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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f56654c4 TM |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * xattr.c | |
6 | * | |
c3cb6827 | 7 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 8 | * |
cf1d6c76 | 9 | * CREDITS: |
c3cb6827 TY |
10 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
11 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
f56654c4 TM |
12 | */ |
13 | ||
cf1d6c76 TY |
14 | #include <linux/capability.h> |
15 | #include <linux/fs.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/highmem.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/uio.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/splice.h> | |
23 | #include <linux/mount.h> | |
24 | #include <linux/writeback.h> | |
25 | #include <linux/falloc.h> | |
01225596 | 26 | #include <linux/sort.h> |
99219aea MF |
27 | #include <linux/init.h> |
28 | #include <linux/module.h> | |
29 | #include <linux/string.h> | |
923f7f31 | 30 | #include <linux/security.h> |
cf1d6c76 | 31 | |
f56654c4 TM |
32 | #include <cluster/masklog.h> |
33 | ||
34 | #include "ocfs2.h" | |
35 | #include "alloc.h" | |
d6b32bbb | 36 | #include "blockcheck.h" |
f56654c4 TM |
37 | #include "dlmglue.h" |
38 | #include "file.h" | |
cf1d6c76 TY |
39 | #include "symlink.h" |
40 | #include "sysfile.h" | |
f56654c4 TM |
41 | #include "inode.h" |
42 | #include "journal.h" | |
43 | #include "ocfs2_fs.h" | |
44 | #include "suballoc.h" | |
45 | #include "uptodate.h" | |
46 | #include "buffer_head_io.h" | |
0c044f0b | 47 | #include "super.h" |
cf1d6c76 | 48 | #include "xattr.h" |
492a8a33 | 49 | #include "refcounttree.h" |
0fe9b66c | 50 | #include "acl.h" |
402b4183 | 51 | #include "ocfs2_trace.h" |
cf1d6c76 TY |
52 | |
53 | struct ocfs2_xattr_def_value_root { | |
54 | struct ocfs2_xattr_value_root xv; | |
55 | struct ocfs2_extent_rec er; | |
56 | }; | |
57 | ||
0c044f0b | 58 | struct ocfs2_xattr_bucket { |
ba937127 JB |
59 | /* The inode these xattrs are associated with */ |
60 | struct inode *bu_inode; | |
61 | ||
62 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 63 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
64 | |
65 | /* How many blocks make up one bucket for this filesystem */ | |
66 | int bu_blocks; | |
0c044f0b TM |
67 | }; |
68 | ||
78f30c31 | 69 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 70 | handle_t *handle; |
78f30c31 TM |
71 | struct ocfs2_alloc_context *meta_ac; |
72 | struct ocfs2_alloc_context *data_ac; | |
73 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
5f5261ac | 74 | int set_abort; |
78f30c31 TM |
75 | }; |
76 | ||
cf1d6c76 TY |
77 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
78 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 79 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
80 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
81 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 82 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
83 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
84 | - sizeof(struct ocfs2_xattr_block) \ | |
85 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 86 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
87 | |
88 | static struct ocfs2_xattr_def_value_root def_xv = { | |
89 | .xv.xr_list.l_count = cpu_to_le16(1), | |
90 | }; | |
91 | ||
537d81ca | 92 | const struct xattr_handler *ocfs2_xattr_handlers[] = { |
cf1d6c76 | 93 | &ocfs2_xattr_user_handler, |
702e5bc6 CH |
94 | &posix_acl_access_xattr_handler, |
95 | &posix_acl_default_xattr_handler, | |
cf1d6c76 | 96 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 97 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
98 | NULL |
99 | }; | |
100 | ||
537d81ca | 101 | static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 102 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 | 103 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
702e5bc6 | 104 | = &posix_acl_access_xattr_handler, |
929fb014 | 105 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] |
702e5bc6 | 106 | = &posix_acl_default_xattr_handler, |
cf1d6c76 | 107 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 108 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
109 | }; |
110 | ||
111 | struct ocfs2_xattr_info { | |
6b240ff6 JB |
112 | int xi_name_index; |
113 | const char *xi_name; | |
18853b95 | 114 | int xi_name_len; |
6b240ff6 JB |
115 | const void *xi_value; |
116 | size_t xi_value_len; | |
cf1d6c76 TY |
117 | }; |
118 | ||
119 | struct ocfs2_xattr_search { | |
120 | struct buffer_head *inode_bh; | |
121 | /* | |
122 | * xattr_bh point to the block buffer head which has extended attribute | |
123 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
124 | */ | |
125 | struct buffer_head *xattr_bh; | |
126 | struct ocfs2_xattr_header *header; | |
ba937127 | 127 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
128 | void *base; |
129 | void *end; | |
130 | struct ocfs2_xattr_entry *here; | |
131 | int not_found; | |
132 | }; | |
133 | ||
11179f2c JB |
134 | /* Operations on struct ocfs2_xa_entry */ |
135 | struct ocfs2_xa_loc; | |
136 | struct ocfs2_xa_loc_operations { | |
cf2bc809 JB |
137 | /* |
138 | * Journal functions | |
139 | */ | |
140 | int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc, | |
141 | int type); | |
142 | void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc); | |
143 | ||
11179f2c JB |
144 | /* |
145 | * Return a pointer to the appropriate buffer in loc->xl_storage | |
146 | * at the given offset from loc->xl_header. | |
147 | */ | |
148 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); | |
149 | ||
69a3e539 JB |
150 | /* Can we reuse the existing entry for the new value? */ |
151 | int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc, | |
152 | struct ocfs2_xattr_info *xi); | |
153 | ||
154 | /* How much space is needed for the new value? */ | |
155 | int (*xlo_check_space)(struct ocfs2_xa_loc *loc, | |
156 | struct ocfs2_xattr_info *xi); | |
157 | ||
158 | /* | |
159 | * Return the offset of the first name+value pair. This is | |
160 | * the start of our downward-filling free space. | |
161 | */ | |
162 | int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc); | |
163 | ||
11179f2c JB |
164 | /* |
165 | * Remove the name+value at this location. Do whatever is | |
166 | * appropriate with the remaining name+value pairs. | |
167 | */ | |
168 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); | |
69a3e539 JB |
169 | |
170 | /* Fill xl_entry with a new entry */ | |
171 | void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash); | |
172 | ||
173 | /* Add name+value storage to an entry */ | |
174 | void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size); | |
3fc12afa JB |
175 | |
176 | /* | |
177 | * Initialize the value buf's access and bh fields for this entry. | |
178 | * ocfs2_xa_fill_value_buf() will handle the xv pointer. | |
179 | */ | |
180 | void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc, | |
181 | struct ocfs2_xattr_value_buf *vb); | |
11179f2c JB |
182 | }; |
183 | ||
184 | /* | |
185 | * Describes an xattr entry location. This is a memory structure | |
186 | * tracking the on-disk structure. | |
187 | */ | |
188 | struct ocfs2_xa_loc { | |
cf2bc809 JB |
189 | /* This xattr belongs to this inode */ |
190 | struct inode *xl_inode; | |
191 | ||
11179f2c JB |
192 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ |
193 | struct ocfs2_xattr_header *xl_header; | |
194 | ||
195 | /* Bytes from xl_header to the end of the storage */ | |
196 | int xl_size; | |
197 | ||
198 | /* | |
199 | * The ocfs2_xattr_entry this location describes. If this is | |
200 | * NULL, this location describes the on-disk structure where it | |
201 | * would have been. | |
202 | */ | |
203 | struct ocfs2_xattr_entry *xl_entry; | |
204 | ||
205 | /* | |
206 | * Internal housekeeping | |
207 | */ | |
208 | ||
209 | /* Buffer(s) containing this entry */ | |
210 | void *xl_storage; | |
211 | ||
212 | /* Operations on the storage backing this location */ | |
213 | const struct ocfs2_xa_loc_operations *xl_ops; | |
214 | }; | |
215 | ||
199799a3 JB |
216 | /* |
217 | * Convenience functions to calculate how much space is needed for a | |
218 | * given name+value pair | |
219 | */ | |
220 | static int namevalue_size(int name_len, uint64_t value_len) | |
221 | { | |
222 | if (value_len > OCFS2_XATTR_INLINE_SIZE) | |
223 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
224 | else | |
225 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
226 | } | |
227 | ||
228 | static int namevalue_size_xi(struct ocfs2_xattr_info *xi) | |
229 | { | |
230 | return namevalue_size(xi->xi_name_len, xi->xi_value_len); | |
231 | } | |
232 | ||
233 | static int namevalue_size_xe(struct ocfs2_xattr_entry *xe) | |
234 | { | |
235 | u64 value_len = le64_to_cpu(xe->xe_value_size); | |
236 | ||
237 | BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) && | |
238 | ocfs2_xattr_is_local(xe)); | |
239 | return namevalue_size(xe->xe_name_len, value_len); | |
240 | } | |
241 | ||
242 | ||
fd68a894 | 243 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
244 | struct ocfs2_xattr_header *xh, |
245 | int index, | |
246 | int *block_off, | |
247 | int *new_offset); | |
248 | ||
54f443f4 JB |
249 | static int ocfs2_xattr_block_find(struct inode *inode, |
250 | int name_index, | |
251 | const char *name, | |
252 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
253 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
254 | struct buffer_head *root_bh, | |
255 | int name_index, | |
256 | const char *name, | |
257 | struct ocfs2_xattr_search *xs); | |
258 | ||
0c044f0b | 259 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 260 | struct buffer_head *blk_bh, |
0c044f0b TM |
261 | char *buffer, |
262 | size_t buffer_size); | |
263 | ||
01225596 | 264 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
265 | struct ocfs2_xattr_search *xs, |
266 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
267 | |
268 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
269 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
270 | struct ocfs2_xattr_search *xs, |
271 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 272 | |
47bca495 TM |
273 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
274 | struct buffer_head *root_bh, | |
275 | u64 blkno, u32 cpos, u32 len, void *para); | |
276 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
277 | struct buffer_head *root_bh, | |
278 | xattr_tree_rec_func *rec_func, | |
279 | void *para); | |
280 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
281 | struct ocfs2_xattr_bucket *bucket, | |
282 | void *para); | |
283 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
284 | struct buffer_head *root_bh, | |
285 | u64 blkno, | |
286 | u32 cpos, | |
287 | u32 len, | |
288 | void *para); | |
289 | ||
c58b6032 JB |
290 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
291 | u64 src_blk, u64 last_blk, u64 to_blk, | |
292 | unsigned int start_bucket, | |
293 | u32 *first_hash); | |
492a8a33 TM |
294 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
295 | struct ocfs2_dinode *di, | |
296 | struct ocfs2_xattr_info *xi, | |
297 | struct ocfs2_xattr_search *xis, | |
298 | struct ocfs2_xattr_search *xbs, | |
299 | struct ocfs2_refcount_tree **ref_tree, | |
300 | int *meta_need, | |
301 | int *credits); | |
ce9c5a54 TM |
302 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
303 | struct ocfs2_xattr_bucket *bucket, | |
304 | int offset, | |
305 | struct ocfs2_xattr_value_root **xv, | |
306 | struct buffer_head **bh); | |
a3944256 | 307 | |
0030e001 TY |
308 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
309 | { | |
310 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
311 | } | |
312 | ||
313 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
314 | { | |
315 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
316 | } | |
317 | ||
9c7759aa | 318 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 319 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 320 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 321 | |
ba937127 | 322 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 323 | { |
ba937127 JB |
324 | struct ocfs2_xattr_bucket *bucket; |
325 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 326 | |
ba937127 JB |
327 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
328 | ||
329 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
330 | if (bucket) { | |
331 | bucket->bu_inode = inode; | |
332 | bucket->bu_blocks = blks; | |
333 | } | |
334 | ||
335 | return bucket; | |
336 | } | |
337 | ||
338 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
339 | { | |
340 | int i; | |
341 | ||
342 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
343 | brelse(bucket->bu_bhs[i]); |
344 | bucket->bu_bhs[i] = NULL; | |
345 | } | |
346 | } | |
347 | ||
ba937127 JB |
348 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
349 | { | |
350 | if (bucket) { | |
351 | ocfs2_xattr_bucket_relse(bucket); | |
352 | bucket->bu_inode = NULL; | |
353 | kfree(bucket); | |
354 | } | |
355 | } | |
356 | ||
784b816a JB |
357 | /* |
358 | * A bucket that has never been written to disk doesn't need to be | |
359 | * read. We just need the buffer_heads. Don't call this for | |
360 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
361 | * them fully. | |
362 | */ | |
ba937127 | 363 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
9c339255 | 364 | u64 xb_blkno, int new) |
784b816a JB |
365 | { |
366 | int i, rc = 0; | |
784b816a | 367 | |
ba937127 JB |
368 | for (i = 0; i < bucket->bu_blocks; i++) { |
369 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
370 | xb_blkno + i); | |
784b816a | 371 | if (!bucket->bu_bhs[i]) { |
7391a294 | 372 | rc = -ENOMEM; |
784b816a JB |
373 | mlog_errno(rc); |
374 | break; | |
375 | } | |
376 | ||
8cb471e8 | 377 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
9c339255 WW |
378 | bucket->bu_bhs[i])) { |
379 | if (new) | |
380 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), | |
381 | bucket->bu_bhs[i]); | |
382 | else { | |
383 | set_buffer_uptodate(bucket->bu_bhs[i]); | |
384 | ocfs2_set_buffer_uptodate(INODE_CACHE(bucket->bu_inode), | |
385 | bucket->bu_bhs[i]); | |
386 | } | |
387 | } | |
784b816a JB |
388 | } |
389 | ||
390 | if (rc) | |
ba937127 | 391 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
392 | return rc; |
393 | } | |
394 | ||
395 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 396 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
397 | u64 xb_blkno) |
398 | { | |
ba937127 | 399 | int rc; |
784b816a | 400 | |
8cb471e8 | 401 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
402 | bucket->bu_blocks, bucket->bu_bhs, 0, |
403 | NULL); | |
4d0e214e | 404 | if (!rc) { |
c8b9cf9a | 405 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
406 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
407 | bucket->bu_bhs, | |
408 | bucket->bu_blocks, | |
409 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 410 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
411 | if (rc) |
412 | mlog_errno(rc); | |
413 | } | |
414 | ||
784b816a | 415 | if (rc) |
ba937127 | 416 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
417 | return rc; |
418 | } | |
419 | ||
1224be02 | 420 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
421 | struct ocfs2_xattr_bucket *bucket, |
422 | int type) | |
423 | { | |
424 | int i, rc = 0; | |
1224be02 | 425 | |
ba937127 | 426 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
427 | rc = ocfs2_journal_access(handle, |
428 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
429 | bucket->bu_bhs[i], type); |
430 | if (rc) { | |
431 | mlog_errno(rc); | |
432 | break; | |
433 | } | |
434 | } | |
435 | ||
436 | return rc; | |
437 | } | |
438 | ||
439 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
440 | struct ocfs2_xattr_bucket *bucket) |
441 | { | |
ba937127 | 442 | int i; |
1224be02 | 443 | |
c8b9cf9a | 444 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
445 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
446 | bucket->bu_bhs, bucket->bu_blocks, | |
447 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 448 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 449 | |
ba937127 | 450 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
451 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
452 | } | |
453 | ||
ba937127 | 454 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
455 | struct ocfs2_xattr_bucket *src) |
456 | { | |
457 | int i; | |
ba937127 JB |
458 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
459 | ||
460 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
461 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 462 | |
ba937127 | 463 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
464 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
465 | blocksize); | |
466 | } | |
467 | } | |
1224be02 | 468 | |
4ae1d69b JB |
469 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
470 | struct buffer_head *bh) | |
471 | { | |
d6b32bbb | 472 | int rc; |
4ae1d69b JB |
473 | struct ocfs2_xattr_block *xb = |
474 | (struct ocfs2_xattr_block *)bh->b_data; | |
475 | ||
402b4183 | 476 | trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr); |
4ae1d69b | 477 | |
d6b32bbb JB |
478 | BUG_ON(!buffer_uptodate(bh)); |
479 | ||
480 | /* | |
481 | * If the ecc fails, we return the error but otherwise | |
482 | * leave the filesystem running. We know any error is | |
483 | * local to this block. | |
484 | */ | |
485 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
486 | if (rc) | |
487 | return rc; | |
488 | ||
489 | /* | |
490 | * Errors after here are fatal | |
491 | */ | |
492 | ||
4ae1d69b | 493 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
17a5b9ab | 494 | return ocfs2_error(sb, |
7ecef14a JP |
495 | "Extended attribute block #%llu has bad signature %.*s\n", |
496 | (unsigned long long)bh->b_blocknr, 7, | |
497 | xb->xb_signature); | |
4ae1d69b JB |
498 | } |
499 | ||
500 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
17a5b9ab | 501 | return ocfs2_error(sb, |
7ecef14a JP |
502 | "Extended attribute block #%llu has an invalid xb_blkno of %llu\n", |
503 | (unsigned long long)bh->b_blocknr, | |
504 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
4ae1d69b JB |
505 | } |
506 | ||
507 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
17a5b9ab | 508 | return ocfs2_error(sb, |
7ecef14a JP |
509 | "Extended attribute block #%llu has an invalid xb_fs_generation of #%u\n", |
510 | (unsigned long long)bh->b_blocknr, | |
511 | le32_to_cpu(xb->xb_fs_generation)); | |
4ae1d69b JB |
512 | } |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
518 | struct buffer_head **bh) | |
519 | { | |
520 | int rc; | |
521 | struct buffer_head *tmp = *bh; | |
522 | ||
8cb471e8 | 523 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 524 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
525 | |
526 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
527 | if (!rc && !*bh) | |
528 | *bh = tmp; | |
529 | ||
530 | return rc; | |
531 | } | |
532 | ||
936b8834 | 533 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 | 534 | { |
537d81ca | 535 | const struct xattr_handler *handler = NULL; |
cf1d6c76 TY |
536 | |
537 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
538 | handler = ocfs2_xattr_handler_map[name_index]; | |
98e9cb57 | 539 | return handler ? xattr_prefix(handler) : NULL; |
cf1d6c76 TY |
540 | } |
541 | ||
40daa16a | 542 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 543 | const char *name, |
40daa16a | 544 | int name_len) |
cf1d6c76 TY |
545 | { |
546 | /* Get hash value of uuid from super block */ | |
547 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
548 | int i; | |
549 | ||
cf1d6c76 TY |
550 | /* hash extended attribute name */ |
551 | for (i = 0; i < name_len; i++) { | |
552 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
553 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
554 | *name++; | |
555 | } | |
556 | ||
557 | return hash; | |
558 | } | |
559 | ||
534eaddd TY |
560 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
561 | { | |
199799a3 JB |
562 | return namevalue_size(name_len, value_len) + |
563 | sizeof(struct ocfs2_xattr_entry); | |
564 | } | |
534eaddd | 565 | |
199799a3 JB |
566 | static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi) |
567 | { | |
568 | return namevalue_size_xi(xi) + | |
569 | sizeof(struct ocfs2_xattr_entry); | |
570 | } | |
534eaddd | 571 | |
199799a3 JB |
572 | static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe) |
573 | { | |
574 | return namevalue_size_xe(xe) + | |
575 | sizeof(struct ocfs2_xattr_entry); | |
534eaddd TY |
576 | } |
577 | ||
578 | int ocfs2_calc_security_init(struct inode *dir, | |
579 | struct ocfs2_security_xattr_info *si, | |
580 | int *want_clusters, | |
581 | int *xattr_credits, | |
582 | struct ocfs2_alloc_context **xattr_ac) | |
583 | { | |
584 | int ret = 0; | |
585 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
586 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
587 | si->value_len); | |
588 | ||
589 | /* | |
590 | * The max space of security xattr taken inline is | |
591 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
592 | * So reserve one metadata block for it is ok. | |
593 | */ | |
594 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
595 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
596 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
597 | if (ret) { | |
598 | mlog_errno(ret); | |
599 | return ret; | |
600 | } | |
601 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
602 | } | |
603 | ||
604 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
605 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
606 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
607 | si->value_len); | |
608 | ||
609 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
610 | new_clusters); | |
611 | *want_clusters += new_clusters; | |
612 | } | |
534eaddd TY |
613 | return ret; |
614 | } | |
615 | ||
89c38bd0 TY |
616 | int ocfs2_calc_xattr_init(struct inode *dir, |
617 | struct buffer_head *dir_bh, | |
67697cbd | 618 | umode_t mode, |
89c38bd0 TY |
619 | struct ocfs2_security_xattr_info *si, |
620 | int *want_clusters, | |
621 | int *xattr_credits, | |
9b7895ef | 622 | int *want_meta) |
89c38bd0 TY |
623 | { |
624 | int ret = 0; | |
625 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 626 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
627 | |
628 | if (si->enable) | |
629 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
630 | si->value_len); | |
631 | ||
632 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
16c8d569 | 633 | down_read(&OCFS2_I(dir)->ip_xattr_sem); |
89c38bd0 TY |
634 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, |
635 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
636 | "", NULL, 0); | |
16c8d569 | 637 | up_read(&OCFS2_I(dir)->ip_xattr_sem); |
89c38bd0 TY |
638 | if (acl_len > 0) { |
639 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
640 | if (S_ISDIR(mode)) | |
641 | a_size <<= 1; | |
642 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
c0a1a6d7 | 643 | ret = acl_len; |
89c38bd0 TY |
644 | mlog_errno(ret); |
645 | return ret; | |
646 | } | |
647 | } | |
648 | ||
649 | if (!(s_size + a_size)) | |
650 | return ret; | |
651 | ||
652 | /* | |
653 | * The max space of security xattr taken inline is | |
654 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
655 | * The max space of acl xattr taken inline is | |
656 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
657 | * when blocksize = 512, may reserve one more cluser for | |
658 | * xattr bucket, otherwise reserve one metadata block | |
659 | * for them is ok. | |
6c9fd1dc TY |
660 | * If this is a new directory with inline data, |
661 | * we choose to reserve the entire inline area for | |
662 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
663 | */ |
664 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 665 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 666 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 667 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
668 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
669 | } | |
670 | ||
671 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
672 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
673 | *want_clusters += 1; | |
674 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
675 | } | |
676 | ||
0e445b6f TY |
677 | /* |
678 | * reserve credits and clusters for xattrs which has large value | |
679 | * and have to be set outside | |
680 | */ | |
681 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
682 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
683 | si->value_len); | |
684 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
685 | new_clusters); | |
686 | *want_clusters += new_clusters; | |
687 | } | |
89c38bd0 TY |
688 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
689 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
690 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
691 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
692 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
693 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
694 | new_clusters); | |
695 | *want_clusters += new_clusters; | |
89c38bd0 TY |
696 | } |
697 | ||
698 | return ret; | |
699 | } | |
700 | ||
f56654c4 TM |
701 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
702 | u32 clusters_to_add, | |
19b801f4 | 703 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 704 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 | 705 | { |
a78f9f46 | 706 | int status = 0, credits; |
85db90e7 | 707 | handle_t *handle = ctxt->handle; |
f56654c4 | 708 | enum ocfs2_alloc_restarted why; |
19b801f4 | 709 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 710 | struct ocfs2_extent_tree et; |
f56654c4 | 711 | |
5e404e9e | 712 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 713 | |
a78f9f46 | 714 | while (clusters_to_add) { |
402b4183 TM |
715 | trace_ocfs2_xattr_extend_allocation(clusters_to_add); |
716 | ||
a78f9f46 TM |
717 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
718 | OCFS2_JOURNAL_ACCESS_WRITE); | |
719 | if (status < 0) { | |
720 | mlog_errno(status); | |
721 | break; | |
722 | } | |
f56654c4 | 723 | |
a78f9f46 TM |
724 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
725 | status = ocfs2_add_clusters_in_btree(handle, | |
726 | &et, | |
727 | &logical_start, | |
728 | clusters_to_add, | |
729 | 0, | |
730 | ctxt->data_ac, | |
731 | ctxt->meta_ac, | |
732 | &why); | |
733 | if ((status < 0) && (status != -EAGAIN)) { | |
734 | if (status != -ENOSPC) | |
735 | mlog_errno(status); | |
736 | break; | |
737 | } | |
f56654c4 | 738 | |
a78f9f46 TM |
739 | ocfs2_journal_dirty(handle, vb->vb_bh); |
740 | ||
741 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - | |
742 | prev_clusters; | |
743 | ||
744 | if (why != RESTART_NONE && clusters_to_add) { | |
745 | /* | |
746 | * We can only fail in case the alloc file doesn't give | |
747 | * up enough clusters. | |
748 | */ | |
749 | BUG_ON(why == RESTART_META); | |
750 | ||
a78f9f46 | 751 | credits = ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 752 | &vb->vb_xv->xr_list); |
a78f9f46 TM |
753 | status = ocfs2_extend_trans(handle, credits); |
754 | if (status < 0) { | |
755 | status = -ENOMEM; | |
756 | mlog_errno(status); | |
757 | break; | |
758 | } | |
759 | } | |
760 | } | |
f56654c4 TM |
761 | |
762 | return status; | |
763 | } | |
764 | ||
765 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 766 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 767 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 768 | unsigned int ext_flags, |
78f30c31 | 769 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
770 | { |
771 | int ret; | |
772 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 773 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
774 | struct ocfs2_extent_tree et; |
775 | ||
5e404e9e | 776 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 777 | |
0cf2f763 | 778 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 779 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
780 | if (ret) { |
781 | mlog_errno(ret); | |
85db90e7 | 782 | goto out; |
f56654c4 TM |
783 | } |
784 | ||
dbdcf6a4 | 785 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 786 | &ctxt->dealloc); |
f56654c4 TM |
787 | if (ret) { |
788 | mlog_errno(ret); | |
85db90e7 | 789 | goto out; |
f56654c4 TM |
790 | } |
791 | ||
d72cc72d | 792 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
ec20cec7 | 793 | ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 | 794 | |
492a8a33 TM |
795 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
796 | ret = ocfs2_decrease_refcount(inode, handle, | |
797 | ocfs2_blocks_to_clusters(inode->i_sb, | |
798 | phys_blkno), | |
799 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
800 | else | |
801 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
802 | phys_blkno, len); | |
f56654c4 TM |
803 | if (ret) |
804 | mlog_errno(ret); | |
805 | ||
f56654c4 | 806 | out: |
f56654c4 TM |
807 | return ret; |
808 | } | |
809 | ||
810 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
811 | u32 old_clusters, | |
812 | u32 new_clusters, | |
19b801f4 | 813 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 814 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
815 | { |
816 | int ret = 0; | |
492a8a33 | 817 | unsigned int ext_flags; |
f56654c4 TM |
818 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
819 | u64 block; | |
f56654c4 TM |
820 | |
821 | if (old_clusters <= new_clusters) | |
822 | return 0; | |
823 | ||
824 | cpos = new_clusters; | |
825 | trunc_len = old_clusters - new_clusters; | |
826 | while (trunc_len) { | |
827 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 828 | &alloc_size, |
492a8a33 | 829 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
830 | if (ret) { |
831 | mlog_errno(ret); | |
832 | goto out; | |
833 | } | |
834 | ||
835 | if (alloc_size > trunc_len) | |
836 | alloc_size = trunc_len; | |
837 | ||
19b801f4 | 838 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 839 | phys_cpos, alloc_size, |
492a8a33 | 840 | ext_flags, ctxt); |
f56654c4 TM |
841 | if (ret) { |
842 | mlog_errno(ret); | |
843 | goto out; | |
844 | } | |
845 | ||
846 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
847 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
848 | block, alloc_size); | |
f56654c4 TM |
849 | cpos += alloc_size; |
850 | trunc_len -= alloc_size; | |
851 | } | |
852 | ||
853 | out: | |
f56654c4 TM |
854 | return ret; |
855 | } | |
856 | ||
857 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 858 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
859 | int len, |
860 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
861 | { |
862 | int ret; | |
863 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 864 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
865 | |
866 | if (new_clusters == old_clusters) | |
867 | return 0; | |
868 | ||
869 | if (new_clusters > old_clusters) | |
870 | ret = ocfs2_xattr_extend_allocation(inode, | |
871 | new_clusters - old_clusters, | |
b3e5d379 | 872 | vb, ctxt); |
f56654c4 TM |
873 | else |
874 | ret = ocfs2_xattr_shrink_size(inode, | |
875 | old_clusters, new_clusters, | |
b3e5d379 | 876 | vb, ctxt); |
f56654c4 TM |
877 | |
878 | return ret; | |
879 | } | |
cf1d6c76 | 880 | |
1046cb11 AG |
881 | static int ocfs2_xattr_list_entry(struct super_block *sb, |
882 | char *buffer, size_t size, | |
883 | size_t *result, int type, | |
936b8834 TM |
884 | const char *name, int name_len) |
885 | { | |
886 | char *p = buffer + *result; | |
1046cb11 AG |
887 | const char *prefix; |
888 | int prefix_len; | |
889 | int total_len; | |
936b8834 | 890 | |
1046cb11 AG |
891 | switch(type) { |
892 | case OCFS2_XATTR_INDEX_USER: | |
893 | if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
894 | return 0; | |
895 | break; | |
896 | ||
897 | case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS: | |
898 | case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT: | |
1751e8a6 | 899 | if (!(sb->s_flags & SB_POSIXACL)) |
1046cb11 AG |
900 | return 0; |
901 | break; | |
902 | ||
903 | case OCFS2_XATTR_INDEX_TRUSTED: | |
904 | if (!capable(CAP_SYS_ADMIN)) | |
905 | return 0; | |
906 | break; | |
907 | } | |
908 | ||
909 | prefix = ocfs2_xattr_prefix(type); | |
910 | if (!prefix) | |
911 | return 0; | |
912 | prefix_len = strlen(prefix); | |
913 | total_len = prefix_len + name_len + 1; | |
936b8834 TM |
914 | *result += total_len; |
915 | ||
916 | /* we are just looking for how big our buffer needs to be */ | |
917 | if (!size) | |
918 | return 0; | |
919 | ||
920 | if (*result > size) | |
921 | return -ERANGE; | |
922 | ||
923 | memcpy(p, prefix, prefix_len); | |
924 | memcpy(p + prefix_len, name, name_len); | |
925 | p[prefix_len + name_len] = '\0'; | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
cf1d6c76 TY |
930 | static int ocfs2_xattr_list_entries(struct inode *inode, |
931 | struct ocfs2_xattr_header *header, | |
932 | char *buffer, size_t buffer_size) | |
933 | { | |
936b8834 TM |
934 | size_t result = 0; |
935 | int i, type, ret; | |
1046cb11 | 936 | const char *name; |
cf1d6c76 TY |
937 | |
938 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
939 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 | 940 | type = ocfs2_xattr_get_type(entry); |
1046cb11 AG |
941 | name = (const char *)header + |
942 | le16_to_cpu(entry->xe_name_offset); | |
936b8834 | 943 | |
1046cb11 AG |
944 | ret = ocfs2_xattr_list_entry(inode->i_sb, |
945 | buffer, buffer_size, | |
946 | &result, type, name, | |
947 | entry->xe_name_len); | |
948 | if (ret) | |
949 | return ret; | |
cf1d6c76 TY |
950 | } |
951 | ||
936b8834 | 952 | return result; |
cf1d6c76 TY |
953 | } |
954 | ||
8b2c0dba TM |
955 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
956 | struct ocfs2_dinode *di) | |
957 | { | |
958 | struct ocfs2_xattr_header *xh; | |
959 | int i; | |
960 | ||
961 | xh = (struct ocfs2_xattr_header *) | |
962 | ((void *)di + inode->i_sb->s_blocksize - | |
963 | le16_to_cpu(di->i_xattr_inline_size)); | |
964 | ||
965 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
966 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
967 | return 1; | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
cf1d6c76 TY |
972 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
973 | struct ocfs2_dinode *di, | |
974 | char *buffer, | |
975 | size_t buffer_size) | |
976 | { | |
977 | struct ocfs2_xattr_header *header = NULL; | |
978 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
979 | int ret = 0; | |
980 | ||
981 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
982 | return ret; | |
983 | ||
984 | header = (struct ocfs2_xattr_header *) | |
985 | ((void *)di + inode->i_sb->s_blocksize - | |
986 | le16_to_cpu(di->i_xattr_inline_size)); | |
987 | ||
988 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
989 | ||
990 | return ret; | |
991 | } | |
992 | ||
993 | static int ocfs2_xattr_block_list(struct inode *inode, | |
994 | struct ocfs2_dinode *di, | |
995 | char *buffer, | |
996 | size_t buffer_size) | |
997 | { | |
998 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 999 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1000 | int ret = 0; |
1001 | ||
1002 | if (!di->i_xattr_loc) | |
1003 | return ret; | |
1004 | ||
4ae1d69b JB |
1005 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
1006 | &blk_bh); | |
cf1d6c76 TY |
1007 | if (ret < 0) { |
1008 | mlog_errno(ret); | |
1009 | return ret; | |
1010 | } | |
cf1d6c76 | 1011 | |
0c044f0b | 1012 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
1013 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1014 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
1015 | ret = ocfs2_xattr_list_entries(inode, header, | |
1016 | buffer, buffer_size); | |
47bca495 TM |
1017 | } else |
1018 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 1019 | buffer, buffer_size); |
4ae1d69b | 1020 | |
cf1d6c76 TY |
1021 | brelse(blk_bh); |
1022 | ||
1023 | return ret; | |
1024 | } | |
1025 | ||
1026 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
1027 | char *buffer, | |
1028 | size_t size) | |
1029 | { | |
1030 | int ret = 0, i_ret = 0, b_ret = 0; | |
1031 | struct buffer_head *di_bh = NULL; | |
1032 | struct ocfs2_dinode *di = NULL; | |
2b0143b5 | 1033 | struct ocfs2_inode_info *oi = OCFS2_I(d_inode(dentry)); |
cf1d6c76 | 1034 | |
8154da3d TY |
1035 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
1036 | return -EOPNOTSUPP; | |
1037 | ||
cf1d6c76 TY |
1038 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1039 | return ret; | |
1040 | ||
2b0143b5 | 1041 | ret = ocfs2_inode_lock(d_inode(dentry), &di_bh, 0); |
cf1d6c76 TY |
1042 | if (ret < 0) { |
1043 | mlog_errno(ret); | |
1044 | return ret; | |
1045 | } | |
1046 | ||
1047 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1048 | ||
1049 | down_read(&oi->ip_xattr_sem); | |
2b0143b5 | 1050 | i_ret = ocfs2_xattr_ibody_list(d_inode(dentry), di, buffer, size); |
cf1d6c76 TY |
1051 | if (i_ret < 0) |
1052 | b_ret = 0; | |
1053 | else { | |
1054 | if (buffer) { | |
1055 | buffer += i_ret; | |
1056 | size -= i_ret; | |
1057 | } | |
2b0143b5 | 1058 | b_ret = ocfs2_xattr_block_list(d_inode(dentry), di, |
cf1d6c76 TY |
1059 | buffer, size); |
1060 | if (b_ret < 0) | |
1061 | i_ret = 0; | |
1062 | } | |
1063 | up_read(&oi->ip_xattr_sem); | |
2b0143b5 | 1064 | ocfs2_inode_unlock(d_inode(dentry), 0); |
cf1d6c76 TY |
1065 | |
1066 | brelse(di_bh); | |
1067 | ||
1068 | return i_ret + b_ret; | |
1069 | } | |
1070 | ||
1071 | static int ocfs2_xattr_find_entry(int name_index, | |
1072 | const char *name, | |
1073 | struct ocfs2_xattr_search *xs) | |
1074 | { | |
1075 | struct ocfs2_xattr_entry *entry; | |
1076 | size_t name_len; | |
1077 | int i, cmp = 1; | |
1078 | ||
1079 | if (name == NULL) | |
1080 | return -EINVAL; | |
1081 | ||
1082 | name_len = strlen(name); | |
1083 | entry = xs->here; | |
1084 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1085 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
1086 | if (!cmp) | |
1087 | cmp = name_len - entry->xe_name_len; | |
1088 | if (!cmp) | |
1089 | cmp = memcmp(name, (xs->base + | |
1090 | le16_to_cpu(entry->xe_name_offset)), | |
1091 | name_len); | |
1092 | if (cmp == 0) | |
1093 | break; | |
1094 | entry += 1; | |
1095 | } | |
1096 | xs->here = entry; | |
1097 | ||
1098 | return cmp ? -ENODATA : 0; | |
1099 | } | |
1100 | ||
1101 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 1102 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
1103 | void *buffer, |
1104 | size_t len) | |
1105 | { | |
1106 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1107 | u64 blkno; | |
1108 | int i, ret = 0; | |
1109 | size_t cplen, blocksize; | |
1110 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1111 | struct ocfs2_extent_list *el; |
1112 | ||
cf1d6c76 TY |
1113 | el = &xv->xr_list; |
1114 | clusters = le32_to_cpu(xv->xr_clusters); | |
1115 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1116 | blocksize = inode->i_sb->s_blocksize; | |
1117 | ||
1118 | cpos = 0; | |
1119 | while (cpos < clusters) { | |
1120 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1121 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1122 | if (ret) { |
1123 | mlog_errno(ret); | |
1124 | goto out; | |
1125 | } | |
1126 | ||
1127 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1128 | /* Copy ocfs2_xattr_value */ | |
1129 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1130 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1131 | &bh, NULL); | |
cf1d6c76 TY |
1132 | if (ret) { |
1133 | mlog_errno(ret); | |
1134 | goto out; | |
1135 | } | |
1136 | ||
1137 | cplen = len >= blocksize ? blocksize : len; | |
1138 | memcpy(buffer, bh->b_data, cplen); | |
1139 | len -= cplen; | |
1140 | buffer += cplen; | |
1141 | ||
1142 | brelse(bh); | |
1143 | bh = NULL; | |
1144 | if (len == 0) | |
1145 | break; | |
1146 | } | |
1147 | cpos += num_clusters; | |
1148 | } | |
1149 | out: | |
1150 | return ret; | |
1151 | } | |
1152 | ||
1153 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1154 | int name_index, | |
1155 | const char *name, | |
1156 | void *buffer, | |
1157 | size_t buffer_size, | |
1158 | struct ocfs2_xattr_search *xs) | |
1159 | { | |
1160 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1161 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1162 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1163 | size_t size; |
1164 | int ret = 0; | |
1165 | ||
1166 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1167 | return -ENODATA; | |
1168 | ||
1169 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1170 | xs->header = (struct ocfs2_xattr_header *) | |
1171 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1172 | xs->base = (void *)xs->header; | |
1173 | xs->here = xs->header->xh_entries; | |
1174 | ||
1175 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1176 | if (ret) | |
1177 | return ret; | |
1178 | size = le64_to_cpu(xs->here->xe_value_size); | |
1179 | if (buffer) { | |
1180 | if (size > buffer_size) | |
1181 | return -ERANGE; | |
1182 | if (ocfs2_xattr_is_local(xs->here)) { | |
1183 | memcpy(buffer, (void *)xs->base + | |
1184 | le16_to_cpu(xs->here->xe_name_offset) + | |
1185 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1186 | } else { | |
589dc260 TM |
1187 | xv = (struct ocfs2_xattr_value_root *) |
1188 | (xs->base + le16_to_cpu( | |
1189 | xs->here->xe_name_offset) + | |
1190 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1191 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1192 | buffer, size); |
1193 | if (ret < 0) { | |
1194 | mlog_errno(ret); | |
1195 | return ret; | |
1196 | } | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | return size; | |
1201 | } | |
1202 | ||
1203 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1204 | int name_index, | |
1205 | const char *name, | |
1206 | void *buffer, | |
1207 | size_t buffer_size, | |
1208 | struct ocfs2_xattr_search *xs) | |
1209 | { | |
cf1d6c76 | 1210 | struct ocfs2_xattr_block *xb; |
589dc260 | 1211 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1212 | size_t size; |
44d8e4e1 | 1213 | int ret = -ENODATA, name_offset, name_len, i; |
3f649ab7 | 1214 | int block_off; |
cf1d6c76 | 1215 | |
ba937127 JB |
1216 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1217 | if (!xs->bucket) { | |
1218 | ret = -ENOMEM; | |
1219 | mlog_errno(ret); | |
1220 | goto cleanup; | |
1221 | } | |
589dc260 | 1222 | |
54f443f4 JB |
1223 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1224 | if (ret) { | |
cf1d6c76 | 1225 | mlog_errno(ret); |
cf1d6c76 TY |
1226 | goto cleanup; |
1227 | } | |
1228 | ||
6c1e183e TY |
1229 | if (xs->not_found) { |
1230 | ret = -ENODATA; | |
1231 | goto cleanup; | |
1232 | } | |
1233 | ||
54f443f4 | 1234 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1235 | size = le64_to_cpu(xs->here->xe_value_size); |
1236 | if (buffer) { | |
1237 | ret = -ERANGE; | |
1238 | if (size > buffer_size) | |
1239 | goto cleanup; | |
589dc260 TM |
1240 | |
1241 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1242 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1243 | i = xs->here - xs->header->xh_entries; | |
1244 | ||
1245 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1246 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1247 | bucket_xh(xs->bucket), |
589dc260 TM |
1248 | i, |
1249 | &block_off, | |
1250 | &name_offset); | |
023d4ea3 JQ |
1251 | if (ret) { |
1252 | mlog_errno(ret); | |
1253 | goto cleanup; | |
1254 | } | |
ba937127 | 1255 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1256 | } |
cf1d6c76 TY |
1257 | if (ocfs2_xattr_is_local(xs->here)) { |
1258 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1259 | name_offset + name_len, size); |
cf1d6c76 | 1260 | } else { |
589dc260 TM |
1261 | xv = (struct ocfs2_xattr_value_root *) |
1262 | (xs->base + name_offset + name_len); | |
1263 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1264 | buffer, size); |
1265 | if (ret < 0) { | |
1266 | mlog_errno(ret); | |
1267 | goto cleanup; | |
1268 | } | |
1269 | } | |
1270 | } | |
1271 | ret = size; | |
1272 | cleanup: | |
ba937127 | 1273 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1274 | |
54f443f4 JB |
1275 | brelse(xs->xattr_bh); |
1276 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1277 | return ret; |
1278 | } | |
1279 | ||
4e3e9d02 TY |
1280 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1281 | struct buffer_head *di_bh, | |
0030e001 TY |
1282 | int name_index, |
1283 | const char *name, | |
1284 | void *buffer, | |
1285 | size_t buffer_size) | |
cf1d6c76 TY |
1286 | { |
1287 | int ret; | |
1288 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1289 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1290 | struct ocfs2_xattr_search xis = { | |
1291 | .not_found = -ENODATA, | |
1292 | }; | |
1293 | struct ocfs2_xattr_search xbs = { | |
1294 | .not_found = -ENODATA, | |
1295 | }; | |
1296 | ||
8154da3d TY |
1297 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1298 | return -EOPNOTSUPP; | |
1299 | ||
cf1d6c76 | 1300 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2b693005 | 1301 | return -ENODATA; |
cf1d6c76 | 1302 | |
cf1d6c76 TY |
1303 | xis.inode_bh = xbs.inode_bh = di_bh; |
1304 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1305 | ||
cf1d6c76 TY |
1306 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, |
1307 | buffer_size, &xis); | |
6c1e183e | 1308 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1309 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1310 | buffer_size, &xbs); | |
4e3e9d02 TY |
1311 | |
1312 | return ret; | |
1313 | } | |
1314 | ||
1315 | /* ocfs2_xattr_get() | |
1316 | * | |
1317 | * Copy an extended attribute into the buffer provided. | |
1318 | * Buffer is NULL to compute the size of buffer required. | |
1319 | */ | |
1320 | static int ocfs2_xattr_get(struct inode *inode, | |
1321 | int name_index, | |
1322 | const char *name, | |
1323 | void *buffer, | |
1324 | size_t buffer_size) | |
1325 | { | |
8818efaa | 1326 | int ret, had_lock; |
4e3e9d02 | 1327 | struct buffer_head *di_bh = NULL; |
8818efaa | 1328 | struct ocfs2_lock_holder oh; |
4e3e9d02 | 1329 | |
8818efaa ER |
1330 | had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh); |
1331 | if (had_lock < 0) { | |
1332 | mlog_errno(had_lock); | |
1333 | return had_lock; | |
4e3e9d02 | 1334 | } |
5e64b0d9 | 1335 | down_read(&OCFS2_I(inode)->ip_xattr_sem); |
4e3e9d02 TY |
1336 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, |
1337 | name, buffer, buffer_size); | |
5e64b0d9 | 1338 | up_read(&OCFS2_I(inode)->ip_xattr_sem); |
4e3e9d02 | 1339 | |
8818efaa | 1340 | ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock); |
cf1d6c76 TY |
1341 | |
1342 | brelse(di_bh); | |
1343 | ||
1344 | return ret; | |
1345 | } | |
1346 | ||
1347 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1348 | handle_t *handle, |
492a8a33 | 1349 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1350 | const void *value, |
1351 | int value_len) | |
1352 | { | |
71d548a6 | 1353 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1354 | u16 blocksize = inode->i_sb->s_blocksize; |
1355 | u32 p_cluster, num_clusters; | |
1356 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1357 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1358 | u64 blkno; | |
1359 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1360 | unsigned int ext_flags; |
1361 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1362 | |
1363 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1364 | ||
cf1d6c76 TY |
1365 | while (cpos < clusters) { |
1366 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1367 | &num_clusters, &xv->xr_list, |
492a8a33 | 1368 | &ext_flags); |
cf1d6c76 TY |
1369 | if (ret) { |
1370 | mlog_errno(ret); | |
85db90e7 | 1371 | goto out; |
cf1d6c76 TY |
1372 | } |
1373 | ||
492a8a33 TM |
1374 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1375 | ||
cf1d6c76 TY |
1376 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1377 | ||
1378 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1379 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1380 | &bh, NULL); | |
cf1d6c76 TY |
1381 | if (ret) { |
1382 | mlog_errno(ret); | |
85db90e7 | 1383 | goto out; |
cf1d6c76 TY |
1384 | } |
1385 | ||
1386 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1387 | INODE_CACHE(inode), |
cf1d6c76 TY |
1388 | bh, |
1389 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1390 | if (ret < 0) { | |
1391 | mlog_errno(ret); | |
85db90e7 | 1392 | goto out; |
cf1d6c76 TY |
1393 | } |
1394 | ||
1395 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1396 | memcpy(bh->b_data, value, cp_len); | |
1397 | value_len -= cp_len; | |
1398 | value += cp_len; | |
1399 | if (cp_len < blocksize) | |
1400 | memset(bh->b_data + cp_len, 0, | |
1401 | blocksize - cp_len); | |
1402 | ||
ec20cec7 | 1403 | ocfs2_journal_dirty(handle, bh); |
cf1d6c76 TY |
1404 | brelse(bh); |
1405 | bh = NULL; | |
1406 | ||
1407 | /* | |
1408 | * XXX: do we need to empty all the following | |
1409 | * blocks in this cluster? | |
1410 | */ | |
1411 | if (!value_len) | |
1412 | break; | |
1413 | } | |
1414 | cpos += num_clusters; | |
1415 | } | |
cf1d6c76 TY |
1416 | out: |
1417 | brelse(bh); | |
1418 | ||
1419 | return ret; | |
1420 | } | |
1421 | ||
69a3e539 JB |
1422 | static int ocfs2_xa_check_space_helper(int needed_space, int free_start, |
1423 | int num_entries) | |
1424 | { | |
1425 | int free_space; | |
1426 | ||
1427 | if (!needed_space) | |
1428 | return 0; | |
1429 | ||
1430 | free_space = free_start - | |
1431 | sizeof(struct ocfs2_xattr_header) - | |
1432 | (num_entries * sizeof(struct ocfs2_xattr_entry)) - | |
1433 | OCFS2_XATTR_HEADER_GAP; | |
1434 | if (free_space < 0) | |
1435 | return -EIO; | |
1436 | if (free_space < needed_space) | |
1437 | return -ENOSPC; | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | ||
cf2bc809 JB |
1442 | static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc, |
1443 | int type) | |
1444 | { | |
1445 | return loc->xl_ops->xlo_journal_access(handle, loc, type); | |
1446 | } | |
1447 | ||
1448 | static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc) | |
1449 | { | |
1450 | loc->xl_ops->xlo_journal_dirty(handle, loc); | |
1451 | } | |
1452 | ||
69a3e539 JB |
1453 | /* Give a pointer into the storage for the given offset */ |
1454 | static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset) | |
1455 | { | |
1456 | BUG_ON(offset >= loc->xl_size); | |
1457 | return loc->xl_ops->xlo_offset_pointer(loc, offset); | |
1458 | } | |
1459 | ||
11179f2c JB |
1460 | /* |
1461 | * Wipe the name+value pair and allow the storage to reclaim it. This | |
1462 | * must be followed by either removal of the entry or a call to | |
1463 | * ocfs2_xa_add_namevalue(). | |
1464 | */ | |
1465 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1466 | { | |
1467 | loc->xl_ops->xlo_wipe_namevalue(loc); | |
1468 | } | |
1469 | ||
69a3e539 JB |
1470 | /* |
1471 | * Find lowest offset to a name+value pair. This is the start of our | |
1472 | * downward-growing free space. | |
1473 | */ | |
1474 | static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc) | |
1475 | { | |
1476 | return loc->xl_ops->xlo_get_free_start(loc); | |
1477 | } | |
1478 | ||
1479 | /* Can we reuse loc->xl_entry for xi? */ | |
1480 | static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc, | |
1481 | struct ocfs2_xattr_info *xi) | |
1482 | { | |
1483 | return loc->xl_ops->xlo_can_reuse(loc, xi); | |
1484 | } | |
1485 | ||
1486 | /* How much free space is needed to set the new value */ | |
1487 | static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc, | |
1488 | struct ocfs2_xattr_info *xi) | |
1489 | { | |
1490 | return loc->xl_ops->xlo_check_space(loc, xi); | |
1491 | } | |
1492 | ||
94b07b6f JQ |
1493 | static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1494 | { | |
1495 | loc->xl_ops->xlo_add_entry(loc, name_hash); | |
1496 | loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash); | |
1497 | /* | |
1498 | * We can't leave the new entry's xe_name_offset at zero or | |
1499 | * add_namevalue() will go nuts. We set it to the size of our | |
1500 | * storage so that it can never be less than any other entry. | |
1501 | */ | |
1502 | loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size); | |
1503 | } | |
1504 | ||
69a3e539 JB |
1505 | static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc, |
1506 | struct ocfs2_xattr_info *xi) | |
1507 | { | |
1508 | int size = namevalue_size_xi(xi); | |
1509 | int nameval_offset; | |
1510 | char *nameval_buf; | |
1511 | ||
1512 | loc->xl_ops->xlo_add_namevalue(loc, size); | |
1513 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
1514 | loc->xl_entry->xe_name_len = xi->xi_name_len; | |
1515 | ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index); | |
1516 | ocfs2_xattr_set_local(loc->xl_entry, | |
1517 | xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE); | |
1518 | ||
1519 | nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1520 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); | |
1521 | memset(nameval_buf, 0, size); | |
1522 | memcpy(nameval_buf, xi->xi_name, xi->xi_name_len); | |
1523 | } | |
1524 | ||
3fc12afa JB |
1525 | static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc, |
1526 | struct ocfs2_xattr_value_buf *vb) | |
1527 | { | |
1528 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1529 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
1530 | ||
1531 | /* Value bufs are for value trees */ | |
73857ee0 | 1532 | BUG_ON(ocfs2_xattr_is_local(loc->xl_entry)); |
3fc12afa JB |
1533 | BUG_ON(namevalue_size_xe(loc->xl_entry) != |
1534 | (name_size + OCFS2_XATTR_ROOT_SIZE)); | |
1535 | ||
1536 | loc->xl_ops->xlo_fill_value_buf(loc, vb); | |
1537 | vb->vb_xv = | |
1538 | (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc, | |
1539 | nameval_offset + | |
1540 | name_size); | |
1541 | } | |
1542 | ||
cf2bc809 JB |
1543 | static int ocfs2_xa_block_journal_access(handle_t *handle, |
1544 | struct ocfs2_xa_loc *loc, int type) | |
1545 | { | |
1546 | struct buffer_head *bh = loc->xl_storage; | |
1547 | ocfs2_journal_access_func access; | |
1548 | ||
1549 | if (loc->xl_size == (bh->b_size - | |
1550 | offsetof(struct ocfs2_xattr_block, | |
1551 | xb_attrs.xb_header))) | |
1552 | access = ocfs2_journal_access_xb; | |
1553 | else | |
1554 | access = ocfs2_journal_access_di; | |
1555 | return access(handle, INODE_CACHE(loc->xl_inode), bh, type); | |
1556 | } | |
1557 | ||
1558 | static void ocfs2_xa_block_journal_dirty(handle_t *handle, | |
1559 | struct ocfs2_xa_loc *loc) | |
1560 | { | |
1561 | struct buffer_head *bh = loc->xl_storage; | |
1562 | ||
1563 | ocfs2_journal_dirty(handle, bh); | |
1564 | } | |
1565 | ||
11179f2c JB |
1566 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, |
1567 | int offset) | |
1568 | { | |
11179f2c JB |
1569 | return (char *)loc->xl_header + offset; |
1570 | } | |
1571 | ||
69a3e539 JB |
1572 | static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc, |
1573 | struct ocfs2_xattr_info *xi) | |
1574 | { | |
1575 | /* | |
1576 | * Block storage is strict. If the sizes aren't exact, we will | |
1577 | * remove the old one and reinsert the new. | |
1578 | */ | |
1579 | return namevalue_size_xe(loc->xl_entry) == | |
1580 | namevalue_size_xi(xi); | |
1581 | } | |
1582 | ||
1583 | static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc) | |
1584 | { | |
1585 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1586 | int i, count = le16_to_cpu(xh->xh_count); | |
1587 | int offset, free_start = loc->xl_size; | |
1588 | ||
1589 | for (i = 0; i < count; i++) { | |
1590 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1591 | if (offset < free_start) | |
1592 | free_start = offset; | |
1593 | } | |
1594 | ||
1595 | return free_start; | |
1596 | } | |
1597 | ||
1598 | static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc, | |
1599 | struct ocfs2_xattr_info *xi) | |
1600 | { | |
1601 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1602 | int free_start = ocfs2_xa_get_free_start(loc); | |
1603 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1604 | ||
1605 | /* | |
1606 | * Block storage will reclaim the original entry before inserting | |
1607 | * the new value, so we only need the difference. If the new | |
1608 | * entry is smaller than the old one, we don't need anything. | |
1609 | */ | |
1610 | if (loc->xl_entry) { | |
1611 | /* Don't need space if we're reusing! */ | |
1612 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1613 | needed_space = 0; | |
1614 | else | |
1615 | needed_space -= ocfs2_xe_entry_usage(loc->xl_entry); | |
1616 | } | |
1617 | if (needed_space < 0) | |
1618 | needed_space = 0; | |
1619 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1620 | } | |
1621 | ||
11179f2c JB |
1622 | /* |
1623 | * Block storage for xattrs keeps the name+value pairs compacted. When | |
1624 | * we remove one, we have to shift any that preceded it towards the end. | |
1625 | */ | |
1626 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1627 | { | |
1628 | int i, offset; | |
1629 | int namevalue_offset, first_namevalue_offset, namevalue_size; | |
1630 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1631 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
11179f2c JB |
1632 | int count = le16_to_cpu(xh->xh_count); |
1633 | ||
1634 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); | |
199799a3 | 1635 | namevalue_size = namevalue_size_xe(entry); |
69a3e539 | 1636 | first_namevalue_offset = ocfs2_xa_get_free_start(loc); |
11179f2c JB |
1637 | |
1638 | /* Shift the name+value pairs */ | |
1639 | memmove((char *)xh + first_namevalue_offset + namevalue_size, | |
1640 | (char *)xh + first_namevalue_offset, | |
1641 | namevalue_offset - first_namevalue_offset); | |
1642 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); | |
1643 | ||
1644 | /* Now tell xh->xh_entries about it */ | |
1645 | for (i = 0; i < count; i++) { | |
1646 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
dfe4d3d6 | 1647 | if (offset <= namevalue_offset) |
11179f2c JB |
1648 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, |
1649 | namevalue_size); | |
1650 | } | |
1651 | ||
1652 | /* | |
1653 | * Note that we don't update xh_free_start or xh_name_value_len | |
1654 | * because they're not used in block-stored xattrs. | |
1655 | */ | |
1656 | } | |
1657 | ||
69a3e539 JB |
1658 | static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1659 | { | |
1660 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1661 | loc->xl_entry = &(loc->xl_header->xh_entries[count]); | |
1662 | le16_add_cpu(&loc->xl_header->xh_count, 1); | |
1663 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1664 | } | |
1665 | ||
1666 | static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1667 | { | |
1668 | int free_start = ocfs2_xa_get_free_start(loc); | |
1669 | ||
1670 | loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size); | |
1671 | } | |
1672 | ||
3fc12afa JB |
1673 | static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc, |
1674 | struct ocfs2_xattr_value_buf *vb) | |
1675 | { | |
1676 | struct buffer_head *bh = loc->xl_storage; | |
1677 | ||
1678 | if (loc->xl_size == (bh->b_size - | |
1679 | offsetof(struct ocfs2_xattr_block, | |
1680 | xb_attrs.xb_header))) | |
1681 | vb->vb_access = ocfs2_journal_access_xb; | |
1682 | else | |
1683 | vb->vb_access = ocfs2_journal_access_di; | |
1684 | vb->vb_bh = bh; | |
1685 | } | |
1686 | ||
11179f2c JB |
1687 | /* |
1688 | * Operations for xattrs stored in blocks. This includes inline inode | |
1689 | * storage and unindexed ocfs2_xattr_blocks. | |
1690 | */ | |
1691 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { | |
cf2bc809 JB |
1692 | .xlo_journal_access = ocfs2_xa_block_journal_access, |
1693 | .xlo_journal_dirty = ocfs2_xa_block_journal_dirty, | |
11179f2c | 1694 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, |
69a3e539 JB |
1695 | .xlo_check_space = ocfs2_xa_block_check_space, |
1696 | .xlo_can_reuse = ocfs2_xa_block_can_reuse, | |
1697 | .xlo_get_free_start = ocfs2_xa_block_get_free_start, | |
11179f2c | 1698 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, |
69a3e539 JB |
1699 | .xlo_add_entry = ocfs2_xa_block_add_entry, |
1700 | .xlo_add_namevalue = ocfs2_xa_block_add_namevalue, | |
3fc12afa | 1701 | .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf, |
11179f2c JB |
1702 | }; |
1703 | ||
cf2bc809 JB |
1704 | static int ocfs2_xa_bucket_journal_access(handle_t *handle, |
1705 | struct ocfs2_xa_loc *loc, int type) | |
1706 | { | |
1707 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1708 | ||
1709 | return ocfs2_xattr_bucket_journal_access(handle, bucket, type); | |
1710 | } | |
1711 | ||
1712 | static void ocfs2_xa_bucket_journal_dirty(handle_t *handle, | |
1713 | struct ocfs2_xa_loc *loc) | |
1714 | { | |
1715 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1716 | ||
1717 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
1718 | } | |
1719 | ||
11179f2c JB |
1720 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, |
1721 | int offset) | |
1722 | { | |
1723 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1724 | int block, block_offset; | |
1725 | ||
11179f2c | 1726 | /* The header is at the front of the bucket */ |
cf2bc809 JB |
1727 | block = offset >> loc->xl_inode->i_sb->s_blocksize_bits; |
1728 | block_offset = offset % loc->xl_inode->i_sb->s_blocksize; | |
11179f2c JB |
1729 | |
1730 | return bucket_block(bucket, block) + block_offset; | |
1731 | } | |
1732 | ||
69a3e539 JB |
1733 | static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc, |
1734 | struct ocfs2_xattr_info *xi) | |
1735 | { | |
1736 | return namevalue_size_xe(loc->xl_entry) >= | |
1737 | namevalue_size_xi(xi); | |
1738 | } | |
1739 | ||
1740 | static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc) | |
1741 | { | |
1742 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1743 | return le16_to_cpu(bucket_xh(bucket)->xh_free_start); | |
1744 | } | |
1745 | ||
1746 | static int ocfs2_bucket_align_free_start(struct super_block *sb, | |
1747 | int free_start, int size) | |
1748 | { | |
1749 | /* | |
1750 | * We need to make sure that the name+value pair fits within | |
1751 | * one block. | |
1752 | */ | |
1753 | if (((free_start - size) >> sb->s_blocksize_bits) != | |
1754 | ((free_start - 1) >> sb->s_blocksize_bits)) | |
1755 | free_start -= free_start % sb->s_blocksize; | |
1756 | ||
1757 | return free_start; | |
1758 | } | |
1759 | ||
1760 | static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc, | |
1761 | struct ocfs2_xattr_info *xi) | |
1762 | { | |
1763 | int rc; | |
1764 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1765 | int free_start = ocfs2_xa_get_free_start(loc); | |
1766 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1767 | int size = namevalue_size_xi(xi); | |
cf2bc809 | 1768 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1769 | |
1770 | /* | |
1771 | * Bucket storage does not reclaim name+value pairs it cannot | |
1772 | * reuse. They live as holes until the bucket fills, and then | |
1773 | * the bucket is defragmented. However, the bucket can reclaim | |
1774 | * the ocfs2_xattr_entry. | |
1775 | */ | |
1776 | if (loc->xl_entry) { | |
1777 | /* Don't need space if we're reusing! */ | |
1778 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1779 | needed_space = 0; | |
1780 | else | |
1781 | needed_space -= sizeof(struct ocfs2_xattr_entry); | |
1782 | } | |
1783 | BUG_ON(needed_space < 0); | |
1784 | ||
1785 | if (free_start < size) { | |
1786 | if (needed_space) | |
1787 | return -ENOSPC; | |
1788 | } else { | |
1789 | /* | |
1790 | * First we check if it would fit in the first place. | |
1791 | * Below, we align the free start to a block. This may | |
1792 | * slide us below the minimum gap. By checking unaligned | |
1793 | * first, we avoid that error. | |
1794 | */ | |
1795 | rc = ocfs2_xa_check_space_helper(needed_space, free_start, | |
1796 | count); | |
1797 | if (rc) | |
1798 | return rc; | |
1799 | free_start = ocfs2_bucket_align_free_start(sb, free_start, | |
1800 | size); | |
1801 | } | |
1802 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1803 | } | |
1804 | ||
11179f2c JB |
1805 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) |
1806 | { | |
199799a3 JB |
1807 | le16_add_cpu(&loc->xl_header->xh_name_value_len, |
1808 | -namevalue_size_xe(loc->xl_entry)); | |
11179f2c JB |
1809 | } |
1810 | ||
69a3e539 JB |
1811 | static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1812 | { | |
1813 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1814 | int count = le16_to_cpu(xh->xh_count); | |
1815 | int low = 0, high = count - 1, tmp; | |
1816 | struct ocfs2_xattr_entry *tmp_xe; | |
1817 | ||
1818 | /* | |
1819 | * We keep buckets sorted by name_hash, so we need to find | |
1820 | * our insert place. | |
1821 | */ | |
1822 | while (low <= high && count) { | |
1823 | tmp = (low + high) / 2; | |
1824 | tmp_xe = &xh->xh_entries[tmp]; | |
1825 | ||
1826 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
1827 | low = tmp + 1; | |
1828 | else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash)) | |
1829 | high = tmp - 1; | |
1830 | else { | |
1831 | low = tmp; | |
1832 | break; | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | if (low != count) | |
1837 | memmove(&xh->xh_entries[low + 1], | |
1838 | &xh->xh_entries[low], | |
1839 | ((count - low) * sizeof(struct ocfs2_xattr_entry))); | |
1840 | ||
1841 | le16_add_cpu(&xh->xh_count, 1); | |
1842 | loc->xl_entry = &xh->xh_entries[low]; | |
1843 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1844 | } | |
1845 | ||
1846 | static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1847 | { | |
1848 | int free_start = ocfs2_xa_get_free_start(loc); | |
1849 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
cf2bc809 | 1850 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1851 | int nameval_offset; |
1852 | ||
1853 | free_start = ocfs2_bucket_align_free_start(sb, free_start, size); | |
1854 | nameval_offset = free_start - size; | |
1855 | loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset); | |
1856 | xh->xh_free_start = cpu_to_le16(nameval_offset); | |
1857 | le16_add_cpu(&xh->xh_name_value_len, size); | |
1858 | ||
1859 | } | |
1860 | ||
3fc12afa JB |
1861 | static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc, |
1862 | struct ocfs2_xattr_value_buf *vb) | |
1863 | { | |
1864 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
cf2bc809 | 1865 | struct super_block *sb = loc->xl_inode->i_sb; |
3fc12afa JB |
1866 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
1867 | int size = namevalue_size_xe(loc->xl_entry); | |
1868 | int block_offset = nameval_offset >> sb->s_blocksize_bits; | |
1869 | ||
1870 | /* Values are not allowed to straddle block boundaries */ | |
1871 | BUG_ON(block_offset != | |
1872 | ((nameval_offset + size - 1) >> sb->s_blocksize_bits)); | |
1873 | /* We expect the bucket to be filled in */ | |
1874 | BUG_ON(!bucket->bu_bhs[block_offset]); | |
1875 | ||
1876 | vb->vb_access = ocfs2_journal_access; | |
1877 | vb->vb_bh = bucket->bu_bhs[block_offset]; | |
1878 | } | |
1879 | ||
11179f2c JB |
1880 | /* Operations for xattrs stored in buckets. */ |
1881 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { | |
cf2bc809 JB |
1882 | .xlo_journal_access = ocfs2_xa_bucket_journal_access, |
1883 | .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty, | |
11179f2c | 1884 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, |
69a3e539 JB |
1885 | .xlo_check_space = ocfs2_xa_bucket_check_space, |
1886 | .xlo_can_reuse = ocfs2_xa_bucket_can_reuse, | |
1887 | .xlo_get_free_start = ocfs2_xa_bucket_get_free_start, | |
11179f2c | 1888 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, |
69a3e539 JB |
1889 | .xlo_add_entry = ocfs2_xa_bucket_add_entry, |
1890 | .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue, | |
3fc12afa | 1891 | .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf, |
11179f2c JB |
1892 | }; |
1893 | ||
399ff3a7 JB |
1894 | static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc) |
1895 | { | |
1896 | struct ocfs2_xattr_value_buf vb; | |
1897 | ||
1898 | if (ocfs2_xattr_is_local(loc->xl_entry)) | |
1899 | return 0; | |
1900 | ||
1901 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1902 | return le32_to_cpu(vb.vb_xv->xr_clusters); | |
1903 | } | |
1904 | ||
73857ee0 JB |
1905 | static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes, |
1906 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1907 | { | |
1908 | int trunc_rc, access_rc; | |
1909 | struct ocfs2_xattr_value_buf vb; | |
1910 | ||
1911 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1912 | trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes, | |
1913 | ctxt); | |
1914 | ||
1915 | /* | |
1916 | * The caller of ocfs2_xa_value_truncate() has already called | |
1917 | * ocfs2_xa_journal_access on the loc. However, The truncate code | |
1918 | * calls ocfs2_extend_trans(). This may commit the previous | |
1919 | * transaction and open a new one. If this is a bucket, truncate | |
1920 | * could leave only vb->vb_bh set up for journaling. Meanwhile, | |
1921 | * the caller is expecting to dirty the entire bucket. So we must | |
1922 | * reset the journal work. We do this even if truncate has failed, | |
1923 | * as it could have failed after committing the extend. | |
1924 | */ | |
1925 | access_rc = ocfs2_xa_journal_access(ctxt->handle, loc, | |
1926 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1927 | ||
1928 | /* Errors in truncate take precedence */ | |
1929 | return trunc_rc ? trunc_rc : access_rc; | |
1930 | } | |
1931 | ||
11179f2c JB |
1932 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) |
1933 | { | |
bde1e540 JB |
1934 | int index, count; |
1935 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1936 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1937 | ||
11179f2c | 1938 | ocfs2_xa_wipe_namevalue(loc); |
bde1e540 JB |
1939 | loc->xl_entry = NULL; |
1940 | ||
1941 | le16_add_cpu(&xh->xh_count, -1); | |
1942 | count = le16_to_cpu(xh->xh_count); | |
1943 | ||
1944 | /* | |
1945 | * Only zero out the entry if there are more remaining. This is | |
1946 | * important for an empty bucket, as it keeps track of the | |
1947 | * bucket's hash value. It doesn't hurt empty block storage. | |
1948 | */ | |
1949 | if (count) { | |
1950 | index = ((char *)entry - (char *)&xh->xh_entries) / | |
1951 | sizeof(struct ocfs2_xattr_entry); | |
1952 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], | |
1953 | (count - index) * sizeof(struct ocfs2_xattr_entry)); | |
1954 | memset(&xh->xh_entries[count], 0, | |
1955 | sizeof(struct ocfs2_xattr_entry)); | |
1956 | } | |
11179f2c JB |
1957 | } |
1958 | ||
399ff3a7 JB |
1959 | /* |
1960 | * If we have a problem adjusting the size of an external value during | |
1961 | * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr | |
1962 | * in an intermediate state. For example, the value may be partially | |
1963 | * truncated. | |
1964 | * | |
1965 | * If the value tree hasn't changed, the extend/truncate went nowhere. | |
1966 | * We have nothing to do. The caller can treat it as a straight error. | |
1967 | * | |
1968 | * If the value tree got partially truncated, we now have a corrupted | |
1969 | * extended attribute. We're going to wipe its entry and leak the | |
1970 | * clusters. Better to leak some storage than leave a corrupt entry. | |
1971 | * | |
1972 | * If the value tree grew, it obviously didn't grow enough for the | |
1973 | * new entry. We're not going to try and reclaim those clusters either. | |
1974 | * If there was already an external value there (orig_clusters != 0), | |
1975 | * the new clusters are attached safely and we can just leave the old | |
1976 | * value in place. If there was no external value there, we remove | |
1977 | * the entry. | |
1978 | * | |
1979 | * This way, the xattr block we store in the journal will be consistent. | |
1980 | * If the size change broke because of the journal, no changes will hit | |
1981 | * disk anyway. | |
1982 | */ | |
1983 | static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc, | |
1984 | const char *what, | |
1985 | unsigned int orig_clusters) | |
1986 | { | |
1987 | unsigned int new_clusters = ocfs2_xa_value_clusters(loc); | |
1988 | char *nameval_buf = ocfs2_xa_offset_pointer(loc, | |
1989 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
1990 | ||
1991 | if (new_clusters < orig_clusters) { | |
1992 | mlog(ML_ERROR, | |
1993 | "Partial truncate while %s xattr %.*s. Leaking " | |
1994 | "%u clusters and removing the entry\n", | |
1995 | what, loc->xl_entry->xe_name_len, nameval_buf, | |
1996 | orig_clusters - new_clusters); | |
1997 | ocfs2_xa_remove_entry(loc); | |
1998 | } else if (!orig_clusters) { | |
1999 | mlog(ML_ERROR, | |
2000 | "Unable to allocate an external value for xattr " | |
2001 | "%.*s safely. Leaking %u clusters and removing the " | |
2002 | "entry\n", | |
2003 | loc->xl_entry->xe_name_len, nameval_buf, | |
2004 | new_clusters - orig_clusters); | |
2005 | ocfs2_xa_remove_entry(loc); | |
2006 | } else if (new_clusters > orig_clusters) | |
2007 | mlog(ML_ERROR, | |
2008 | "Unable to grow xattr %.*s safely. %u new clusters " | |
2009 | "have been added, but the value will not be " | |
2010 | "modified\n", | |
2011 | loc->xl_entry->xe_name_len, nameval_buf, | |
2012 | new_clusters - orig_clusters); | |
2013 | } | |
2014 | ||
73857ee0 JB |
2015 | static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc, |
2016 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2017 | { | |
2018 | int rc = 0; | |
399ff3a7 | 2019 | unsigned int orig_clusters; |
73857ee0 JB |
2020 | |
2021 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { | |
399ff3a7 | 2022 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2023 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2024 | if (rc) { | |
2025 | mlog_errno(rc); | |
399ff3a7 JB |
2026 | /* |
2027 | * Since this is remove, we can return 0 if | |
2028 | * ocfs2_xa_cleanup_value_truncate() is going to | |
2029 | * wipe the entry anyway. So we check the | |
2030 | * cluster count as well. | |
2031 | */ | |
2032 | if (orig_clusters != ocfs2_xa_value_clusters(loc)) | |
2033 | rc = 0; | |
2034 | ocfs2_xa_cleanup_value_truncate(loc, "removing", | |
2035 | orig_clusters); | |
2036 | if (rc) | |
2037 | goto out; | |
73857ee0 JB |
2038 | } |
2039 | } | |
2040 | ||
2041 | ocfs2_xa_remove_entry(loc); | |
2042 | ||
2043 | out: | |
2044 | return rc; | |
2045 | } | |
2046 | ||
2047 | static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc) | |
2048 | { | |
2049 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
2050 | char *nameval_buf; | |
2051 | ||
2052 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2053 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2054 | memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE); | |
2055 | } | |
2056 | ||
2057 | /* | |
2058 | * Take an existing entry and make it ready for the new value. This | |
2059 | * won't allocate space, but it may free space. It should be ready for | |
2060 | * ocfs2_xa_prepare_entry() to finish the work. | |
2061 | */ | |
2062 | static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc, | |
2063 | struct ocfs2_xattr_info *xi, | |
2064 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2065 | { | |
2066 | int rc = 0; | |
2067 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
399ff3a7 | 2068 | unsigned int orig_clusters; |
73857ee0 JB |
2069 | char *nameval_buf; |
2070 | int xe_local = ocfs2_xattr_is_local(loc->xl_entry); | |
2071 | int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE; | |
2072 | ||
2073 | BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) != | |
2074 | name_size); | |
2075 | ||
2076 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2077 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2078 | if (xe_local) { | |
2079 | memset(nameval_buf + name_size, 0, | |
2080 | namevalue_size_xe(loc->xl_entry) - name_size); | |
2081 | if (!xi_local) | |
2082 | ocfs2_xa_install_value_root(loc); | |
2083 | } else { | |
399ff3a7 | 2084 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2085 | if (xi_local) { |
2086 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); | |
399ff3a7 | 2087 | if (rc < 0) |
73857ee0 | 2088 | mlog_errno(rc); |
399ff3a7 JB |
2089 | else |
2090 | memset(nameval_buf + name_size, 0, | |
2091 | namevalue_size_xe(loc->xl_entry) - | |
2092 | name_size); | |
73857ee0 JB |
2093 | } else if (le64_to_cpu(loc->xl_entry->xe_value_size) > |
2094 | xi->xi_value_len) { | |
2095 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, | |
2096 | ctxt); | |
399ff3a7 | 2097 | if (rc < 0) |
73857ee0 | 2098 | mlog_errno(rc); |
399ff3a7 JB |
2099 | } |
2100 | ||
2101 | if (rc) { | |
2102 | ocfs2_xa_cleanup_value_truncate(loc, "reusing", | |
2103 | orig_clusters); | |
2104 | goto out; | |
73857ee0 JB |
2105 | } |
2106 | } | |
2107 | ||
2108 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
2109 | ocfs2_xattr_set_local(loc->xl_entry, xi_local); | |
2110 | ||
2111 | out: | |
2112 | return rc; | |
2113 | } | |
2114 | ||
69a3e539 JB |
2115 | /* |
2116 | * Prepares loc->xl_entry to receive the new xattr. This includes | |
2117 | * properly setting up the name+value pair region. If loc->xl_entry | |
2118 | * already exists, it will take care of modifying it appropriately. | |
69a3e539 JB |
2119 | * |
2120 | * Note that this modifies the data. You did journal_access already, | |
2121 | * right? | |
2122 | */ | |
2123 | static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc, | |
2124 | struct ocfs2_xattr_info *xi, | |
73857ee0 JB |
2125 | u32 name_hash, |
2126 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 JB |
2127 | { |
2128 | int rc = 0; | |
399ff3a7 JB |
2129 | unsigned int orig_clusters; |
2130 | __le64 orig_value_size = 0; | |
69a3e539 | 2131 | |
69a3e539 JB |
2132 | rc = ocfs2_xa_check_space(loc, xi); |
2133 | if (rc) | |
2134 | goto out; | |
2135 | ||
94b07b6f JQ |
2136 | if (loc->xl_entry) { |
2137 | if (ocfs2_xa_can_reuse_entry(loc, xi)) { | |
2138 | orig_value_size = loc->xl_entry->xe_value_size; | |
2139 | rc = ocfs2_xa_reuse_entry(loc, xi, ctxt); | |
2140 | if (rc) | |
2141 | goto out; | |
2142 | goto alloc_value; | |
2143 | } | |
56e94ea1 | 2144 | |
94b07b6f JQ |
2145 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
2146 | orig_clusters = ocfs2_xa_value_clusters(loc); | |
2147 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); | |
2148 | if (rc) { | |
2149 | mlog_errno(rc); | |
2150 | ocfs2_xa_cleanup_value_truncate(loc, | |
2151 | "overwriting", | |
2152 | orig_clusters); | |
2153 | goto out; | |
2154 | } | |
73857ee0 | 2155 | } |
94b07b6f JQ |
2156 | ocfs2_xa_wipe_namevalue(loc); |
2157 | } else | |
2158 | ocfs2_xa_add_entry(loc, name_hash); | |
69a3e539 JB |
2159 | |
2160 | /* | |
2161 | * If we get here, we have a blank entry. Fill it. We grow our | |
2162 | * name+value pair back from the end. | |
2163 | */ | |
2164 | ocfs2_xa_add_namevalue(loc, xi); | |
73857ee0 JB |
2165 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
2166 | ocfs2_xa_install_value_root(loc); | |
2167 | ||
2168 | alloc_value: | |
2169 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { | |
399ff3a7 | 2170 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 | 2171 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt); |
399ff3a7 | 2172 | if (rc < 0) { |
5f5261ac | 2173 | ctxt->set_abort = 1; |
399ff3a7 JB |
2174 | ocfs2_xa_cleanup_value_truncate(loc, "growing", |
2175 | orig_clusters); | |
d5a7df06 TM |
2176 | /* |
2177 | * If we were growing an existing value, | |
2178 | * ocfs2_xa_cleanup_value_truncate() won't remove | |
2179 | * the entry. We need to restore the original value | |
2180 | * size. | |
2181 | */ | |
2182 | if (loc->xl_entry) { | |
2183 | BUG_ON(!orig_value_size); | |
2184 | loc->xl_entry->xe_value_size = orig_value_size; | |
2185 | } | |
73857ee0 | 2186 | mlog_errno(rc); |
399ff3a7 | 2187 | } |
73857ee0 | 2188 | } |
69a3e539 JB |
2189 | |
2190 | out: | |
2191 | return rc; | |
2192 | } | |
2193 | ||
2194 | /* | |
73857ee0 JB |
2195 | * Store the value portion of the name+value pair. This will skip |
2196 | * values that are stored externally. Their tree roots were set up | |
2197 | * by ocfs2_xa_prepare_entry(). | |
69a3e539 | 2198 | */ |
73857ee0 JB |
2199 | static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc, |
2200 | struct ocfs2_xattr_info *xi, | |
2201 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 | 2202 | { |
73857ee0 | 2203 | int rc = 0; |
69a3e539 JB |
2204 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
2205 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
69a3e539 | 2206 | char *nameval_buf; |
73857ee0 | 2207 | struct ocfs2_xattr_value_buf vb; |
69a3e539 | 2208 | |
69a3e539 | 2209 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
73857ee0 JB |
2210 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
2211 | ocfs2_xa_fill_value_buf(loc, &vb); | |
2212 | rc = __ocfs2_xattr_set_value_outside(loc->xl_inode, | |
2213 | ctxt->handle, &vb, | |
2214 | xi->xi_value, | |
2215 | xi->xi_value_len); | |
2216 | } else | |
2217 | memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len); | |
2218 | ||
73857ee0 | 2219 | return rc; |
69a3e539 JB |
2220 | } |
2221 | ||
bca5e9bd JB |
2222 | static int ocfs2_xa_set(struct ocfs2_xa_loc *loc, |
2223 | struct ocfs2_xattr_info *xi, | |
2224 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2225 | { | |
2226 | int ret; | |
2227 | u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name, | |
2228 | xi->xi_name_len); | |
2229 | ||
2230 | ret = ocfs2_xa_journal_access(ctxt->handle, loc, | |
2231 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2232 | if (ret) { | |
2233 | mlog_errno(ret); | |
2234 | goto out; | |
2235 | } | |
2236 | ||
399ff3a7 JB |
2237 | /* |
2238 | * From here on out, everything is going to modify the buffer a | |
2239 | * little. Errors are going to leave the xattr header in a | |
2240 | * sane state. Thus, even with errors we dirty the sucker. | |
2241 | */ | |
2242 | ||
bca5e9bd JB |
2243 | /* Don't worry, we are never called with !xi_value and !xl_entry */ |
2244 | if (!xi->xi_value) { | |
2245 | ret = ocfs2_xa_remove(loc, ctxt); | |
399ff3a7 | 2246 | goto out_dirty; |
bca5e9bd JB |
2247 | } |
2248 | ||
2249 | ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt); | |
2250 | if (ret) { | |
2251 | if (ret != -ENOSPC) | |
2252 | mlog_errno(ret); | |
399ff3a7 | 2253 | goto out_dirty; |
bca5e9bd JB |
2254 | } |
2255 | ||
2256 | ret = ocfs2_xa_store_value(loc, xi, ctxt); | |
399ff3a7 | 2257 | if (ret) |
bca5e9bd | 2258 | mlog_errno(ret); |
bca5e9bd | 2259 | |
399ff3a7 | 2260 | out_dirty: |
bca5e9bd JB |
2261 | ocfs2_xa_journal_dirty(ctxt->handle, loc); |
2262 | ||
2263 | out: | |
2264 | return ret; | |
2265 | } | |
2266 | ||
11179f2c JB |
2267 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, |
2268 | struct inode *inode, | |
2269 | struct buffer_head *bh, | |
2270 | struct ocfs2_xattr_entry *entry) | |
2271 | { | |
2272 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; | |
2273 | ||
139fface JB |
2274 | BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL)); |
2275 | ||
cf2bc809 | 2276 | loc->xl_inode = inode; |
11179f2c JB |
2277 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2278 | loc->xl_storage = bh; | |
2279 | loc->xl_entry = entry; | |
139fface | 2280 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); |
11179f2c JB |
2281 | loc->xl_header = |
2282 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - | |
2283 | loc->xl_size); | |
2284 | } | |
2285 | ||
2286 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, | |
cf2bc809 | 2287 | struct inode *inode, |
11179f2c JB |
2288 | struct buffer_head *bh, |
2289 | struct ocfs2_xattr_entry *entry) | |
2290 | { | |
2291 | struct ocfs2_xattr_block *xb = | |
2292 | (struct ocfs2_xattr_block *)bh->b_data; | |
2293 | ||
2294 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); | |
2295 | ||
cf2bc809 | 2296 | loc->xl_inode = inode; |
11179f2c JB |
2297 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2298 | loc->xl_storage = bh; | |
2299 | loc->xl_header = &(xb->xb_attrs.xb_header); | |
2300 | loc->xl_entry = entry; | |
2301 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, | |
2302 | xb_attrs.xb_header); | |
2303 | } | |
2304 | ||
2305 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, | |
2306 | struct ocfs2_xattr_bucket *bucket, | |
2307 | struct ocfs2_xattr_entry *entry) | |
2308 | { | |
cf2bc809 | 2309 | loc->xl_inode = bucket->bu_inode; |
11179f2c JB |
2310 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; |
2311 | loc->xl_storage = bucket; | |
2312 | loc->xl_header = bucket_xh(bucket); | |
2313 | loc->xl_entry = entry; | |
2314 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; | |
2315 | } | |
2316 | ||
ce9c5a54 TM |
2317 | /* |
2318 | * In xattr remove, if it is stored outside and refcounted, we may have | |
2319 | * the chance to split the refcount tree. So need the allocators. | |
2320 | */ | |
2321 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
2322 | struct ocfs2_xattr_value_root *xv, | |
2323 | struct ocfs2_caching_info *ref_ci, | |
2324 | struct buffer_head *ref_root_bh, | |
2325 | struct ocfs2_alloc_context **meta_ac, | |
2326 | int *ref_credits) | |
2327 | { | |
2328 | int ret, meta_add = 0; | |
2329 | u32 p_cluster, num_clusters; | |
2330 | unsigned int ext_flags; | |
2331 | ||
2332 | *ref_credits = 0; | |
2333 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
2334 | &num_clusters, | |
2335 | &xv->xr_list, | |
2336 | &ext_flags); | |
2337 | if (ret) { | |
2338 | mlog_errno(ret); | |
2339 | goto out; | |
2340 | } | |
2341 | ||
2342 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
2343 | goto out; | |
2344 | ||
2345 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
2346 | ref_root_bh, xv, | |
2347 | &meta_add, ref_credits); | |
2348 | if (ret) { | |
2349 | mlog_errno(ret); | |
2350 | goto out; | |
2351 | } | |
2352 | ||
2353 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
2354 | meta_add, meta_ac); | |
2355 | if (ret) | |
2356 | mlog_errno(ret); | |
2357 | ||
2358 | out: | |
2359 | return ret; | |
2360 | } | |
2361 | ||
cf1d6c76 | 2362 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 2363 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
2364 | struct ocfs2_xattr_header *header, |
2365 | struct ocfs2_caching_info *ref_ci, | |
2366 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 2367 | { |
ce9c5a54 | 2368 | int ret = 0, i, ref_credits; |
78f30c31 TM |
2369 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2370 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 2371 | void *val; |
78f30c31 TM |
2372 | |
2373 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
2374 | |
2375 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
2376 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
2377 | ||
ce9c5a54 TM |
2378 | if (ocfs2_xattr_is_local(entry)) |
2379 | continue; | |
cf1d6c76 | 2380 | |
ce9c5a54 TM |
2381 | val = (void *)header + |
2382 | le16_to_cpu(entry->xe_name_offset); | |
2383 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
2384 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
2385 | ||
2386 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
2387 | ref_ci, ref_root_bh, | |
2388 | &ctxt.meta_ac, | |
2389 | &ref_credits); | |
2390 | ||
2391 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
2392 | ocfs2_remove_extent_credits(osb->sb)); | |
2393 | if (IS_ERR(ctxt.handle)) { | |
2394 | ret = PTR_ERR(ctxt.handle); | |
2395 | mlog_errno(ret); | |
2396 | break; | |
2397 | } | |
2398 | ||
2399 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
ce9c5a54 TM |
2400 | |
2401 | ocfs2_commit_trans(osb, ctxt.handle); | |
2402 | if (ctxt.meta_ac) { | |
2403 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2404 | ctxt.meta_ac = NULL; | |
cf1d6c76 | 2405 | } |
b8a0ae57 WW |
2406 | |
2407 | if (ret < 0) { | |
2408 | mlog_errno(ret); | |
2409 | break; | |
2410 | } | |
2411 | ||
cf1d6c76 TY |
2412 | } |
2413 | ||
ce9c5a54 TM |
2414 | if (ctxt.meta_ac) |
2415 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
2416 | ocfs2_schedule_truncate_log_flush(osb, 1); |
2417 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2418 | return ret; |
2419 | } | |
2420 | ||
2421 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
2422 | struct buffer_head *di_bh, |
2423 | struct ocfs2_caching_info *ref_ci, | |
2424 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2425 | { |
2426 | ||
2427 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2428 | struct ocfs2_xattr_header *header; | |
2429 | int ret; | |
4311901d JB |
2430 | struct ocfs2_xattr_value_buf vb = { |
2431 | .vb_bh = di_bh, | |
2432 | .vb_access = ocfs2_journal_access_di, | |
2433 | }; | |
cf1d6c76 TY |
2434 | |
2435 | header = (struct ocfs2_xattr_header *) | |
2436 | ((void *)di + inode->i_sb->s_blocksize - | |
2437 | le16_to_cpu(di->i_xattr_inline_size)); | |
2438 | ||
ce9c5a54 TM |
2439 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2440 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2441 | |
2442 | return ret; | |
2443 | } | |
2444 | ||
ce9c5a54 TM |
2445 | struct ocfs2_rm_xattr_bucket_para { |
2446 | struct ocfs2_caching_info *ref_ci; | |
2447 | struct buffer_head *ref_root_bh; | |
2448 | }; | |
2449 | ||
cf1d6c76 | 2450 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
2451 | struct buffer_head *blk_bh, |
2452 | struct ocfs2_caching_info *ref_ci, | |
2453 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2454 | { |
2455 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 2456 | int ret = 0; |
4311901d JB |
2457 | struct ocfs2_xattr_value_buf vb = { |
2458 | .vb_bh = blk_bh, | |
2459 | .vb_access = ocfs2_journal_access_xb, | |
2460 | }; | |
ce9c5a54 TM |
2461 | struct ocfs2_rm_xattr_bucket_para args = { |
2462 | .ref_ci = ref_ci, | |
2463 | .ref_root_bh = ref_root_bh, | |
2464 | }; | |
cf1d6c76 TY |
2465 | |
2466 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
2467 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
2468 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
2469 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2470 | ref_ci, ref_root_bh); | |
a3944256 | 2471 | } else |
47bca495 TM |
2472 | ret = ocfs2_iterate_xattr_index_block(inode, |
2473 | blk_bh, | |
2474 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 2475 | &args); |
cf1d6c76 TY |
2476 | |
2477 | return ret; | |
2478 | } | |
2479 | ||
08413899 | 2480 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
2481 | u64 block, |
2482 | struct ocfs2_caching_info *ref_ci, | |
2483 | struct buffer_head *ref_root_bh) | |
08413899 TM |
2484 | { |
2485 | struct inode *xb_alloc_inode; | |
2486 | struct buffer_head *xb_alloc_bh = NULL; | |
2487 | struct buffer_head *blk_bh = NULL; | |
2488 | struct ocfs2_xattr_block *xb; | |
2489 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2490 | handle_t *handle; | |
2491 | int ret = 0; | |
2492 | u64 blk, bg_blkno; | |
2493 | u16 bit; | |
2494 | ||
4ae1d69b | 2495 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
2496 | if (ret < 0) { |
2497 | mlog_errno(ret); | |
2498 | goto out; | |
2499 | } | |
2500 | ||
ce9c5a54 | 2501 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
2502 | if (ret < 0) { |
2503 | mlog_errno(ret); | |
2504 | goto out; | |
2505 | } | |
2506 | ||
4ae1d69b | 2507 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
2508 | blk = le64_to_cpu(xb->xb_blkno); |
2509 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
74380c47 TM |
2510 | if (xb->xb_suballoc_loc) |
2511 | bg_blkno = le64_to_cpu(xb->xb_suballoc_loc); | |
2512 | else | |
2513 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
08413899 TM |
2514 | |
2515 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2516 | EXTENT_ALLOC_SYSTEM_INODE, | |
2517 | le16_to_cpu(xb->xb_suballoc_slot)); | |
2518 | if (!xb_alloc_inode) { | |
2519 | ret = -ENOMEM; | |
2520 | mlog_errno(ret); | |
2521 | goto out; | |
2522 | } | |
5955102c | 2523 | inode_lock(xb_alloc_inode); |
08413899 TM |
2524 | |
2525 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
2526 | if (ret < 0) { | |
2527 | mlog_errno(ret); | |
2528 | goto out_mutex; | |
2529 | } | |
2530 | ||
2531 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
2532 | if (IS_ERR(handle)) { | |
2533 | ret = PTR_ERR(handle); | |
2534 | mlog_errno(ret); | |
2535 | goto out_unlock; | |
2536 | } | |
2537 | ||
2538 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
2539 | bit, bg_blkno, 1); | |
2540 | if (ret < 0) | |
2541 | mlog_errno(ret); | |
2542 | ||
2543 | ocfs2_commit_trans(osb, handle); | |
2544 | out_unlock: | |
2545 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
2546 | brelse(xb_alloc_bh); | |
2547 | out_mutex: | |
5955102c | 2548 | inode_unlock(xb_alloc_inode); |
08413899 TM |
2549 | iput(xb_alloc_inode); |
2550 | out: | |
2551 | brelse(blk_bh); | |
2552 | return ret; | |
2553 | } | |
2554 | ||
cf1d6c76 TY |
2555 | /* |
2556 | * ocfs2_xattr_remove() | |
2557 | * | |
2558 | * Free extended attribute resources associated with this inode. | |
2559 | */ | |
2560 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2561 | { | |
cf1d6c76 TY |
2562 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2563 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2564 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2565 | struct buffer_head *ref_root_bh = NULL; | |
2566 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2567 | handle_t *handle; |
2568 | int ret; | |
2569 | ||
8154da3d TY |
2570 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2571 | return 0; | |
2572 | ||
cf1d6c76 TY |
2573 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2574 | return 0; | |
2575 | ||
84e40080 | 2576 | if (ocfs2_is_refcount_inode(inode)) { |
ce9c5a54 TM |
2577 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), |
2578 | le64_to_cpu(di->i_refcount_loc), | |
2579 | 1, &ref_tree, &ref_root_bh); | |
2580 | if (ret) { | |
2581 | mlog_errno(ret); | |
2582 | goto out; | |
2583 | } | |
2584 | ref_ci = &ref_tree->rf_ci; | |
2585 | ||
2586 | } | |
2587 | ||
cf1d6c76 | 2588 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2589 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2590 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2591 | if (ret < 0) { |
2592 | mlog_errno(ret); | |
2593 | goto out; | |
2594 | } | |
2595 | } | |
cf1d6c76 | 2596 | |
08413899 TM |
2597 | if (di->i_xattr_loc) { |
2598 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2599 | le64_to_cpu(di->i_xattr_loc), |
2600 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2601 | if (ret < 0) { |
2602 | mlog_errno(ret); | |
2603 | goto out; | |
2604 | } | |
2605 | } | |
2606 | ||
2607 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2608 | OCFS2_INODE_UPDATE_CREDITS); | |
2609 | if (IS_ERR(handle)) { | |
2610 | ret = PTR_ERR(handle); | |
2611 | mlog_errno(ret); | |
2612 | goto out; | |
2613 | } | |
0cf2f763 | 2614 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2615 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2616 | if (ret) { |
2617 | mlog_errno(ret); | |
2618 | goto out_commit; | |
2619 | } | |
2620 | ||
08413899 | 2621 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2622 | |
2623 | spin_lock(&oi->ip_lock); | |
2624 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2625 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2626 | spin_unlock(&oi->ip_lock); | |
6fdb702d | 2627 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
cf1d6c76 | 2628 | |
ec20cec7 | 2629 | ocfs2_journal_dirty(handle, di_bh); |
cf1d6c76 TY |
2630 | out_commit: |
2631 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2632 | out: | |
ce9c5a54 TM |
2633 | if (ref_tree) |
2634 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2635 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2636 | return ret; |
2637 | } | |
2638 | ||
2639 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2640 | struct ocfs2_dinode *di) | |
2641 | { | |
2642 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2643 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2644 | int free; | |
2645 | ||
2646 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2647 | return 0; | |
2648 | ||
2649 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2650 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2651 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2652 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2653 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2654 | le64_to_cpu(di->i_size); | |
2655 | } else { | |
2656 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2657 | free = (le16_to_cpu(el->l_count) - | |
2658 | le16_to_cpu(el->l_next_free_rec)) * | |
2659 | sizeof(struct ocfs2_extent_rec); | |
2660 | } | |
2661 | if (free >= xattrsize) | |
2662 | return 1; | |
2663 | ||
2664 | return 0; | |
2665 | } | |
2666 | ||
2667 | /* | |
2668 | * ocfs2_xattr_ibody_find() | |
2669 | * | |
2670 | * Find extended attribute in inode block and | |
2671 | * fill search info into struct ocfs2_xattr_search. | |
2672 | */ | |
2673 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2674 | int name_index, | |
2675 | const char *name, | |
2676 | struct ocfs2_xattr_search *xs) | |
2677 | { | |
2678 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2679 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2680 | int ret; | |
2681 | int has_space = 0; | |
2682 | ||
2683 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2684 | return 0; | |
2685 | ||
2686 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2687 | down_read(&oi->ip_alloc_sem); | |
2688 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2689 | up_read(&oi->ip_alloc_sem); | |
2690 | if (!has_space) | |
2691 | return 0; | |
2692 | } | |
2693 | ||
2694 | xs->xattr_bh = xs->inode_bh; | |
2695 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2696 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2697 | xs->header = (struct ocfs2_xattr_header *) | |
2698 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2699 | else | |
2700 | xs->header = (struct ocfs2_xattr_header *) | |
2701 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2702 | xs->base = (void *)xs->header; | |
2703 | xs->here = xs->header->xh_entries; | |
2704 | ||
2705 | /* Find the named attribute. */ | |
2706 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2707 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2708 | if (ret && ret != -ENODATA) | |
2709 | return ret; | |
2710 | xs->not_found = ret; | |
2711 | } | |
2712 | ||
2713 | return 0; | |
2714 | } | |
2715 | ||
139fface JB |
2716 | static int ocfs2_xattr_ibody_init(struct inode *inode, |
2717 | struct buffer_head *di_bh, | |
2718 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2719 | { | |
2720 | int ret; | |
2721 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2722 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2723 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2724 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
2725 | ||
2726 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2727 | ret = -ENOSPC; | |
2728 | goto out; | |
2729 | } | |
2730 | ||
2731 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh, | |
2732 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2733 | if (ret) { | |
2734 | mlog_errno(ret); | |
2735 | goto out; | |
2736 | } | |
2737 | ||
2738 | /* | |
2739 | * Adjust extent record count or inline data size | |
2740 | * to reserve space for extended attribute. | |
2741 | */ | |
2742 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2743 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2744 | le16_add_cpu(&idata->id_count, -xattrsize); | |
2745 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
2746 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2747 | le16_add_cpu(&el->l_count, -(xattrsize / | |
2748 | sizeof(struct ocfs2_extent_rec))); | |
2749 | } | |
2750 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
2751 | ||
2752 | spin_lock(&oi->ip_lock); | |
2753 | oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL; | |
2754 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2755 | spin_unlock(&oi->ip_lock); | |
2756 | ||
ec20cec7 | 2757 | ocfs2_journal_dirty(ctxt->handle, di_bh); |
139fface JB |
2758 | |
2759 | out: | |
2760 | return ret; | |
2761 | } | |
2762 | ||
cf1d6c76 TY |
2763 | /* |
2764 | * ocfs2_xattr_ibody_set() | |
2765 | * | |
2766 | * Set, replace or remove an extended attribute into inode block. | |
2767 | * | |
2768 | */ | |
2769 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2770 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2771 | struct ocfs2_xattr_search *xs, |
2772 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 | 2773 | { |
139fface | 2774 | int ret; |
cf1d6c76 | 2775 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
139fface | 2776 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2777 | |
2778 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2779 | return -ENOSPC; | |
2780 | ||
2781 | down_write(&oi->ip_alloc_sem); | |
139fface JB |
2782 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
2783 | ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt); | |
2784 | if (ret) { | |
2785 | if (ret != -ENOSPC) | |
2786 | mlog_errno(ret); | |
2787 | goto out; | |
2788 | } | |
2789 | } | |
2790 | ||
2791 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, | |
2792 | xs->not_found ? NULL : xs->here); | |
2793 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
2794 | if (ret) { | |
2795 | if (ret != -ENOSPC) | |
2796 | mlog_errno(ret); | |
2797 | goto out; | |
2798 | } | |
2799 | xs->here = loc.xl_entry; | |
2800 | ||
cf1d6c76 TY |
2801 | out: |
2802 | up_write(&oi->ip_alloc_sem); | |
2803 | ||
2804 | return ret; | |
2805 | } | |
2806 | ||
2807 | /* | |
2808 | * ocfs2_xattr_block_find() | |
2809 | * | |
2810 | * Find extended attribute in external block and | |
2811 | * fill search info into struct ocfs2_xattr_search. | |
2812 | */ | |
2813 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2814 | int name_index, | |
2815 | const char *name, | |
2816 | struct ocfs2_xattr_search *xs) | |
2817 | { | |
2818 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2819 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2820 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2821 | int ret = 0; |
2822 | ||
2823 | if (!di->i_xattr_loc) | |
2824 | return ret; | |
2825 | ||
4ae1d69b JB |
2826 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2827 | &blk_bh); | |
cf1d6c76 TY |
2828 | if (ret < 0) { |
2829 | mlog_errno(ret); | |
2830 | return ret; | |
2831 | } | |
f6087fb7 | 2832 | |
cf1d6c76 | 2833 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2834 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2835 | |
2836 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2837 | xs->header = &xb->xb_attrs.xb_header; | |
2838 | xs->base = (void *)xs->header; | |
2839 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2840 | xs->here = xs->header->xh_entries; | |
2841 | ||
2842 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2843 | } else | |
2844 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2845 | name_index, | |
2846 | name, xs); | |
cf1d6c76 | 2847 | |
cf1d6c76 TY |
2848 | if (ret && ret != -ENODATA) { |
2849 | xs->xattr_bh = NULL; | |
2850 | goto cleanup; | |
2851 | } | |
2852 | xs->not_found = ret; | |
2853 | return 0; | |
cf1d6c76 TY |
2854 | cleanup: |
2855 | brelse(blk_bh); | |
2856 | ||
2857 | return ret; | |
2858 | } | |
2859 | ||
d3981544 | 2860 | static int ocfs2_create_xattr_block(struct inode *inode, |
5aea1f0e | 2861 | struct buffer_head *inode_bh, |
d3981544 JB |
2862 | struct ocfs2_xattr_set_ctxt *ctxt, |
2863 | int indexed, | |
2864 | struct buffer_head **ret_bh) | |
5aea1f0e TM |
2865 | { |
2866 | int ret; | |
2867 | u16 suballoc_bit_start; | |
2868 | u32 num_got; | |
2b6cb576 | 2869 | u64 suballoc_loc, first_blkno; |
5aea1f0e | 2870 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; |
5aea1f0e TM |
2871 | struct buffer_head *new_bh = NULL; |
2872 | struct ocfs2_xattr_block *xblk; | |
2873 | ||
d3981544 JB |
2874 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
2875 | inode_bh, OCFS2_JOURNAL_ACCESS_CREATE); | |
5aea1f0e TM |
2876 | if (ret < 0) { |
2877 | mlog_errno(ret); | |
2878 | goto end; | |
2879 | } | |
2880 | ||
1ed9b777 | 2881 | ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1, |
2b6cb576 JB |
2882 | &suballoc_loc, &suballoc_bit_start, |
2883 | &num_got, &first_blkno); | |
5aea1f0e TM |
2884 | if (ret < 0) { |
2885 | mlog_errno(ret); | |
2886 | goto end; | |
2887 | } | |
2888 | ||
2889 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
58796207 RX |
2890 | if (!new_bh) { |
2891 | ret = -ENOMEM; | |
2892 | mlog_errno(ret); | |
2893 | goto end; | |
2894 | } | |
2895 | ||
5aea1f0e TM |
2896 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); |
2897 | ||
d3981544 | 2898 | ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode), |
5aea1f0e TM |
2899 | new_bh, |
2900 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2901 | if (ret < 0) { | |
2902 | mlog_errno(ret); | |
2903 | goto end; | |
2904 | } | |
2905 | ||
2906 | /* Initialize ocfs2_xattr_block */ | |
2907 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2908 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2909 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
d3981544 | 2910 | xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot); |
2b6cb576 | 2911 | xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc); |
5aea1f0e | 2912 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
1ed9b777 JB |
2913 | xblk->xb_fs_generation = |
2914 | cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation); | |
5aea1f0e | 2915 | xblk->xb_blkno = cpu_to_le64(first_blkno); |
a7fe7a3a TM |
2916 | if (indexed) { |
2917 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2918 | xr->xt_clusters = cpu_to_le32(1); | |
2919 | xr->xt_last_eb_blk = 0; | |
2920 | xr->xt_list.l_tree_depth = 0; | |
2921 | xr->xt_list.l_count = cpu_to_le16( | |
2922 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2923 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2924 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2925 | } | |
d3981544 | 2926 | ocfs2_journal_dirty(ctxt->handle, new_bh); |
a7fe7a3a | 2927 | |
d3981544 | 2928 | /* Add it to the inode */ |
5aea1f0e | 2929 | di->i_xattr_loc = cpu_to_le64(first_blkno); |
d3981544 JB |
2930 | |
2931 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2932 | OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
2933 | di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); | |
2934 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2935 | ||
2936 | ocfs2_journal_dirty(ctxt->handle, inode_bh); | |
5aea1f0e TM |
2937 | |
2938 | *ret_bh = new_bh; | |
2939 | new_bh = NULL; | |
2940 | ||
2941 | end: | |
2942 | brelse(new_bh); | |
2943 | return ret; | |
2944 | } | |
2945 | ||
cf1d6c76 TY |
2946 | /* |
2947 | * ocfs2_xattr_block_set() | |
2948 | * | |
2949 | * Set, replace or remove an extended attribute into external block. | |
2950 | * | |
2951 | */ | |
2952 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2953 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2954 | struct ocfs2_xattr_search *xs, |
2955 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2956 | { |
2957 | struct buffer_head *new_bh = NULL; | |
cf1d6c76 | 2958 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 | 2959 | int ret; |
d3981544 | 2960 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2961 | |
2962 | if (!xs->xattr_bh) { | |
d3981544 JB |
2963 | ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt, |
2964 | 0, &new_bh); | |
5aea1f0e | 2965 | if (ret) { |
cf1d6c76 | 2966 | mlog_errno(ret); |
85db90e7 | 2967 | goto end; |
cf1d6c76 TY |
2968 | } |
2969 | ||
cf1d6c76 | 2970 | xs->xattr_bh = new_bh; |
5aea1f0e | 2971 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2972 | xs->header = &xblk->xb_attrs.xb_header; |
2973 | xs->base = (void *)xs->header; | |
2974 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2975 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2976 | } else |
2977 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2978 | ||
2979 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
d3981544 JB |
2980 | ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh, |
2981 | xs->not_found ? NULL : xs->here); | |
01225596 | 2982 | |
d3981544 JB |
2983 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
2984 | if (!ret) | |
2985 | xs->here = loc.xl_entry; | |
5f5261ac | 2986 | else if ((ret != -ENOSPC) || ctxt->set_abort) |
01225596 | 2987 | goto end; |
d3981544 JB |
2988 | else { |
2989 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); | |
2990 | if (ret) | |
2991 | goto end; | |
2992 | } | |
cf1d6c76 TY |
2993 | } |
2994 | ||
d3981544 JB |
2995 | if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED) |
2996 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); | |
01225596 TM |
2997 | |
2998 | end: | |
cf1d6c76 TY |
2999 | return ret; |
3000 | } | |
3001 | ||
78f30c31 TM |
3002 | /* Check whether the new xattr can be inserted into the inode. */ |
3003 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
3004 | struct ocfs2_xattr_info *xi, | |
3005 | struct ocfs2_xattr_search *xs) | |
3006 | { | |
78f30c31 TM |
3007 | struct ocfs2_xattr_entry *last; |
3008 | int free, i; | |
3009 | size_t min_offs = xs->end - xs->base; | |
3010 | ||
3011 | if (!xs->header) | |
3012 | return 0; | |
3013 | ||
3014 | last = xs->header->xh_entries; | |
3015 | ||
3016 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
3017 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
3018 | if (offs < min_offs) | |
3019 | min_offs = offs; | |
3020 | last += 1; | |
3021 | } | |
3022 | ||
4442f518 | 3023 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
3024 | if (free < 0) |
3025 | return 0; | |
3026 | ||
3027 | BUG_ON(!xs->not_found); | |
3028 | ||
199799a3 | 3029 | if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi))) |
78f30c31 TM |
3030 | return 1; |
3031 | ||
3032 | return 0; | |
3033 | } | |
3034 | ||
3035 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
3036 | struct ocfs2_dinode *di, | |
3037 | struct ocfs2_xattr_info *xi, | |
3038 | struct ocfs2_xattr_search *xis, | |
3039 | struct ocfs2_xattr_search *xbs, | |
3040 | int *clusters_need, | |
85db90e7 TM |
3041 | int *meta_need, |
3042 | int *credits_need) | |
78f30c31 TM |
3043 | { |
3044 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 3045 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
3046 | struct buffer_head *bh = NULL; |
3047 | struct ocfs2_xattr_block *xb = NULL; | |
3048 | struct ocfs2_xattr_entry *xe = NULL; | |
3049 | struct ocfs2_xattr_value_root *xv = NULL; | |
3050 | char *base = NULL; | |
3051 | int name_offset, name_len = 0; | |
3052 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
6b240ff6 | 3053 | xi->xi_value_len); |
78f30c31 TM |
3054 | u64 value_size; |
3055 | ||
71d548a6 TM |
3056 | /* |
3057 | * Calculate the clusters we need to write. | |
3058 | * No matter whether we replace an old one or add a new one, | |
3059 | * we need this for writing. | |
3060 | */ | |
6b240ff6 | 3061 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
71d548a6 TM |
3062 | credits += new_clusters * |
3063 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3064 | ||
78f30c31 | 3065 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
3066 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3067 | ||
6b240ff6 | 3068 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 | 3069 | clusters_add += new_clusters; |
85db90e7 | 3070 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3071 | &def_xv.xv.xr_list); |
85db90e7 | 3072 | } |
78f30c31 TM |
3073 | |
3074 | goto meta_guess; | |
3075 | } | |
3076 | ||
3077 | if (!xis->not_found) { | |
3078 | xe = xis->here; | |
3079 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3080 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3081 | base = xis->base; | |
85db90e7 | 3082 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 3083 | } else { |
970e4936 | 3084 | int i, block_off = 0; |
78f30c31 TM |
3085 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
3086 | xe = xbs->here; | |
3087 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3088 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3089 | i = xbs->here - xbs->header->xh_entries; | |
3090 | old_in_xb = 1; | |
3091 | ||
3092 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 3093 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
3094 | bucket_xh(xbs->bucket), |
3095 | i, &block_off, | |
3096 | &name_offset); | |
3097 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
3098 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3099 | } else { | |
78f30c31 | 3100 | base = xbs->base; |
85db90e7 TM |
3101 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
3102 | } | |
3103 | } | |
3104 | ||
3105 | /* | |
3106 | * delete a xattr doesn't need metadata and cluster allocation. | |
3107 | * so just calculate the credits and return. | |
3108 | * | |
3109 | * The credits for removing the value tree will be extended | |
3110 | * by ocfs2_remove_extent itself. | |
3111 | */ | |
6b240ff6 | 3112 | if (!xi->xi_value) { |
85db90e7 | 3113 | if (!ocfs2_xattr_is_local(xe)) |
a90714c1 | 3114 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
3115 | |
3116 | goto out; | |
78f30c31 TM |
3117 | } |
3118 | ||
3119 | /* do cluster allocation guess first. */ | |
3120 | value_size = le64_to_cpu(xe->xe_value_size); | |
3121 | ||
3122 | if (old_in_xb) { | |
3123 | /* | |
3124 | * In xattr set, we always try to set the xe in inode first, | |
3125 | * so if it can be inserted into inode successfully, the old | |
3126 | * one will be removed from the xattr block, and this xattr | |
3127 | * will be inserted into inode as a new xattr in inode. | |
3128 | */ | |
3129 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
3130 | clusters_add += new_clusters; | |
a90714c1 | 3131 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
3132 | OCFS2_INODE_UPDATE_CREDITS; |
3133 | if (!ocfs2_xattr_is_local(xe)) | |
3134 | credits += ocfs2_calc_extend_credits( | |
3135 | inode->i_sb, | |
06f9da6e | 3136 | &def_xv.xv.xr_list); |
78f30c31 TM |
3137 | goto out; |
3138 | } | |
3139 | } | |
3140 | ||
6b240ff6 | 3141 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 TM |
3142 | /* the new values will be stored outside. */ |
3143 | u32 old_clusters = 0; | |
3144 | ||
3145 | if (!ocfs2_xattr_is_local(xe)) { | |
3146 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
3147 | value_size); | |
3148 | xv = (struct ocfs2_xattr_value_root *) | |
3149 | (base + name_offset + name_len); | |
97aff52a | 3150 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
3151 | } else |
3152 | xv = &def_xv.xv; | |
3153 | ||
85db90e7 | 3154 | if (old_clusters >= new_clusters) { |
a90714c1 | 3155 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 3156 | goto out; |
85db90e7 | 3157 | } else { |
78f30c31 TM |
3158 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
3159 | clusters_add += new_clusters - old_clusters; | |
85db90e7 | 3160 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3161 | &xv->xr_list); |
97aff52a TM |
3162 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
3163 | goto out; | |
78f30c31 TM |
3164 | } |
3165 | } else { | |
3166 | /* | |
3167 | * Now the new value will be stored inside. So if the new | |
3168 | * value is smaller than the size of value root or the old | |
3169 | * value, we don't need any allocation, otherwise we have | |
3170 | * to guess metadata allocation. | |
3171 | */ | |
6b240ff6 JB |
3172 | if ((ocfs2_xattr_is_local(xe) && |
3173 | (value_size >= xi->xi_value_len)) || | |
78f30c31 | 3174 | (!ocfs2_xattr_is_local(xe) && |
6b240ff6 | 3175 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
78f30c31 TM |
3176 | goto out; |
3177 | } | |
3178 | ||
3179 | meta_guess: | |
3180 | /* calculate metadata allocation. */ | |
3181 | if (di->i_xattr_loc) { | |
3182 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
3183 | ret = ocfs2_read_xattr_block(inode, |
3184 | le64_to_cpu(di->i_xattr_loc), | |
3185 | &bh); | |
78f30c31 TM |
3186 | if (ret) { |
3187 | mlog_errno(ret); | |
3188 | goto out; | |
3189 | } | |
3190 | ||
3191 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
3192 | } else | |
3193 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
3194 | ||
90cb546c TM |
3195 | /* |
3196 | * If there is already an xattr tree, good, we can calculate | |
3197 | * like other b-trees. Otherwise we may have the chance of | |
3198 | * create a tree, the credit calculation is borrowed from | |
3199 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
3200 | * new tree will be cluster based, so no meta is needed. | |
3201 | */ | |
78f30c31 TM |
3202 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
3203 | struct ocfs2_extent_list *el = | |
3204 | &xb->xb_attrs.xb_root.xt_list; | |
3205 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 | 3206 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3207 | el); |
90cb546c TM |
3208 | } else |
3209 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
3210 | |
3211 | /* | |
3212 | * This cluster will be used either for new bucket or for | |
3213 | * new xattr block. | |
3214 | * If the cluster size is the same as the bucket size, one | |
3215 | * more is needed since we may need to extend the bucket | |
3216 | * also. | |
3217 | */ | |
3218 | clusters_add += 1; | |
85db90e7 | 3219 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 3220 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
3221 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
3222 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 3223 | clusters_add += 1; |
85db90e7 TM |
3224 | } |
3225 | } else { | |
85db90e7 | 3226 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
3ed2be71 TS |
3227 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
3228 | struct ocfs2_extent_list *el = &def_xv.xv.xr_list; | |
3229 | meta_add += ocfs2_extend_meta_needed(el); | |
3230 | credits += ocfs2_calc_extend_credits(inode->i_sb, | |
3231 | el); | |
3232 | } else { | |
3233 | meta_add += 1; | |
3234 | } | |
85db90e7 | 3235 | } |
78f30c31 TM |
3236 | out: |
3237 | if (clusters_need) | |
3238 | *clusters_need = clusters_add; | |
3239 | if (meta_need) | |
3240 | *meta_need = meta_add; | |
85db90e7 TM |
3241 | if (credits_need) |
3242 | *credits_need = credits; | |
78f30c31 TM |
3243 | brelse(bh); |
3244 | return ret; | |
3245 | } | |
3246 | ||
3247 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
3248 | struct ocfs2_dinode *di, | |
3249 | struct ocfs2_xattr_info *xi, | |
3250 | struct ocfs2_xattr_search *xis, | |
3251 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 3252 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 3253 | int extra_meta, |
85db90e7 | 3254 | int *credits) |
78f30c31 TM |
3255 | { |
3256 | int clusters_add, meta_add, ret; | |
3257 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3258 | ||
3259 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
3260 | ||
3261 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
3262 | ||
3263 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 3264 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
3265 | if (ret) { |
3266 | mlog_errno(ret); | |
3267 | return ret; | |
3268 | } | |
3269 | ||
492a8a33 | 3270 | meta_add += extra_meta; |
402b4183 TM |
3271 | trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add, |
3272 | clusters_add, *credits); | |
78f30c31 TM |
3273 | |
3274 | if (meta_add) { | |
3275 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
3276 | &ctxt->meta_ac); | |
3277 | if (ret) { | |
3278 | mlog_errno(ret); | |
3279 | goto out; | |
3280 | } | |
3281 | } | |
3282 | ||
3283 | if (clusters_add) { | |
3284 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
3285 | if (ret) | |
3286 | mlog_errno(ret); | |
3287 | } | |
3288 | out: | |
3289 | if (ret) { | |
3290 | if (ctxt->meta_ac) { | |
3291 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
3292 | ctxt->meta_ac = NULL; | |
3293 | } | |
3294 | ||
3295 | /* | |
3296 | * We cannot have an error and a non null ctxt->data_ac. | |
3297 | */ | |
3298 | } | |
3299 | ||
3300 | return ret; | |
3301 | } | |
3302 | ||
85db90e7 TM |
3303 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
3304 | struct ocfs2_dinode *di, | |
3305 | struct ocfs2_xattr_info *xi, | |
3306 | struct ocfs2_xattr_search *xis, | |
3307 | struct ocfs2_xattr_search *xbs, | |
3308 | struct ocfs2_xattr_set_ctxt *ctxt) | |
3309 | { | |
9f868f16 | 3310 | int ret = 0, credits, old_found; |
85db90e7 | 3311 | |
6b240ff6 | 3312 | if (!xi->xi_value) { |
85db90e7 TM |
3313 | /* Remove existing extended attribute */ |
3314 | if (!xis->not_found) | |
3315 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3316 | else if (!xbs->not_found) | |
3317 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3318 | } else { | |
3319 | /* We always try to set extended attribute into inode first*/ | |
3320 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3321 | if (!ret && !xbs->not_found) { | |
3322 | /* | |
3323 | * If succeed and that extended attribute existing in | |
3324 | * external block, then we will remove it. | |
3325 | */ | |
6b240ff6 JB |
3326 | xi->xi_value = NULL; |
3327 | xi->xi_value_len = 0; | |
85db90e7 | 3328 | |
9f868f16 | 3329 | old_found = xis->not_found; |
85db90e7 TM |
3330 | xis->not_found = -ENODATA; |
3331 | ret = ocfs2_calc_xattr_set_need(inode, | |
3332 | di, | |
3333 | xi, | |
3334 | xis, | |
3335 | xbs, | |
3336 | NULL, | |
3337 | NULL, | |
3338 | &credits); | |
9f868f16 | 3339 | xis->not_found = old_found; |
85db90e7 TM |
3340 | if (ret) { |
3341 | mlog_errno(ret); | |
3342 | goto out; | |
3343 | } | |
3344 | ||
c901fb00 | 3345 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3346 | if (ret) { |
3347 | mlog_errno(ret); | |
3348 | goto out; | |
3349 | } | |
3350 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
5f5261ac | 3351 | } else if ((ret == -ENOSPC) && !ctxt->set_abort) { |
85db90e7 TM |
3352 | if (di->i_xattr_loc && !xbs->xattr_bh) { |
3353 | ret = ocfs2_xattr_block_find(inode, | |
6b240ff6 JB |
3354 | xi->xi_name_index, |
3355 | xi->xi_name, xbs); | |
85db90e7 TM |
3356 | if (ret) |
3357 | goto out; | |
3358 | ||
9f868f16 | 3359 | old_found = xis->not_found; |
85db90e7 TM |
3360 | xis->not_found = -ENODATA; |
3361 | ret = ocfs2_calc_xattr_set_need(inode, | |
3362 | di, | |
3363 | xi, | |
3364 | xis, | |
3365 | xbs, | |
3366 | NULL, | |
3367 | NULL, | |
3368 | &credits); | |
9f868f16 | 3369 | xis->not_found = old_found; |
85db90e7 TM |
3370 | if (ret) { |
3371 | mlog_errno(ret); | |
3372 | goto out; | |
3373 | } | |
3374 | ||
c901fb00 | 3375 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3376 | if (ret) { |
3377 | mlog_errno(ret); | |
3378 | goto out; | |
3379 | } | |
3380 | } | |
3381 | /* | |
3382 | * If no space in inode, we will set extended attribute | |
3383 | * into external block. | |
3384 | */ | |
3385 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3386 | if (ret) | |
3387 | goto out; | |
3388 | if (!xis->not_found) { | |
3389 | /* | |
3390 | * If succeed and that extended attribute | |
3391 | * existing in inode, we will remove it. | |
3392 | */ | |
6b240ff6 JB |
3393 | xi->xi_value = NULL; |
3394 | xi->xi_value_len = 0; | |
85db90e7 TM |
3395 | xbs->not_found = -ENODATA; |
3396 | ret = ocfs2_calc_xattr_set_need(inode, | |
3397 | di, | |
3398 | xi, | |
3399 | xis, | |
3400 | xbs, | |
3401 | NULL, | |
3402 | NULL, | |
3403 | &credits); | |
3404 | if (ret) { | |
3405 | mlog_errno(ret); | |
3406 | goto out; | |
3407 | } | |
3408 | ||
c901fb00 | 3409 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3410 | if (ret) { |
3411 | mlog_errno(ret); | |
3412 | goto out; | |
3413 | } | |
3414 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
3415 | xis, ctxt); | |
3416 | } | |
3417 | } | |
3418 | } | |
3419 | ||
4b3f6209 TM |
3420 | if (!ret) { |
3421 | /* Update inode ctime. */ | |
0cf2f763 | 3422 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
3423 | xis->inode_bh, |
3424 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
3425 | if (ret) { |
3426 | mlog_errno(ret); | |
3427 | goto out; | |
3428 | } | |
3429 | ||
078cd827 | 3430 | inode->i_ctime = current_time(inode); |
4b3f6209 TM |
3431 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
3432 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
3433 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
3434 | } | |
85db90e7 TM |
3435 | out: |
3436 | return ret; | |
3437 | } | |
3438 | ||
6c3faba4 TY |
3439 | /* |
3440 | * This function only called duing creating inode | |
3441 | * for init security/acl xattrs of the new inode. | |
008aafaf | 3442 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
3443 | */ |
3444 | int ocfs2_xattr_set_handle(handle_t *handle, | |
3445 | struct inode *inode, | |
3446 | struct buffer_head *di_bh, | |
3447 | int name_index, | |
3448 | const char *name, | |
3449 | const void *value, | |
3450 | size_t value_len, | |
3451 | int flags, | |
3452 | struct ocfs2_alloc_context *meta_ac, | |
3453 | struct ocfs2_alloc_context *data_ac) | |
3454 | { | |
3455 | struct ocfs2_dinode *di; | |
3456 | int ret; | |
3457 | ||
3458 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3459 | .xi_name_index = name_index, |
3460 | .xi_name = name, | |
18853b95 | 3461 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3462 | .xi_value = value, |
3463 | .xi_value_len = value_len, | |
6c3faba4 TY |
3464 | }; |
3465 | ||
3466 | struct ocfs2_xattr_search xis = { | |
3467 | .not_found = -ENODATA, | |
3468 | }; | |
3469 | ||
3470 | struct ocfs2_xattr_search xbs = { | |
3471 | .not_found = -ENODATA, | |
3472 | }; | |
3473 | ||
3474 | struct ocfs2_xattr_set_ctxt ctxt = { | |
3475 | .handle = handle, | |
3476 | .meta_ac = meta_ac, | |
3477 | .data_ac = data_ac, | |
3478 | }; | |
3479 | ||
3480 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
3481 | return -EOPNOTSUPP; | |
3482 | ||
008aafaf TY |
3483 | /* |
3484 | * In extreme situation, may need xattr bucket when | |
3485 | * block size is too small. And we have already reserved | |
3486 | * the credits for bucket in mknod. | |
3487 | */ | |
3488 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
3489 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3490 | if (!xbs.bucket) { | |
3491 | mlog_errno(-ENOMEM); | |
3492 | return -ENOMEM; | |
3493 | } | |
3494 | } | |
3495 | ||
6c3faba4 TY |
3496 | xis.inode_bh = xbs.inode_bh = di_bh; |
3497 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3498 | ||
3499 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3500 | ||
3501 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3502 | if (ret) | |
3503 | goto cleanup; | |
3504 | if (xis.not_found) { | |
3505 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3506 | if (ret) | |
3507 | goto cleanup; | |
3508 | } | |
3509 | ||
3510 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3511 | ||
3512 | cleanup: | |
3513 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3514 | brelse(xbs.xattr_bh); | |
008aafaf | 3515 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
3516 | |
3517 | return ret; | |
3518 | } | |
3519 | ||
cf1d6c76 TY |
3520 | /* |
3521 | * ocfs2_xattr_set() | |
3522 | * | |
3523 | * Set, replace or remove an extended attribute for this inode. | |
3524 | * value is NULL to remove an existing extended attribute, else either | |
3525 | * create or replace an extended attribute. | |
3526 | */ | |
3527 | int ocfs2_xattr_set(struct inode *inode, | |
3528 | int name_index, | |
3529 | const char *name, | |
3530 | const void *value, | |
3531 | size_t value_len, | |
3532 | int flags) | |
3533 | { | |
3534 | struct buffer_head *di_bh = NULL; | |
3535 | struct ocfs2_dinode *di; | |
8818efaa | 3536 | int ret, credits, had_lock, ref_meta = 0, ref_credits = 0; |
78f30c31 | 3537 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 3538 | struct inode *tl_inode = osb->osb_tl_inode; |
6ea437a3 | 3539 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, NULL, }; |
492a8a33 | 3540 | struct ocfs2_refcount_tree *ref_tree = NULL; |
8818efaa | 3541 | struct ocfs2_lock_holder oh; |
cf1d6c76 TY |
3542 | |
3543 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3544 | .xi_name_index = name_index, |
3545 | .xi_name = name, | |
18853b95 | 3546 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3547 | .xi_value = value, |
3548 | .xi_value_len = value_len, | |
cf1d6c76 TY |
3549 | }; |
3550 | ||
3551 | struct ocfs2_xattr_search xis = { | |
3552 | .not_found = -ENODATA, | |
3553 | }; | |
3554 | ||
3555 | struct ocfs2_xattr_search xbs = { | |
3556 | .not_found = -ENODATA, | |
3557 | }; | |
3558 | ||
1119d3c0 | 3559 | if (!ocfs2_supports_xattr(osb)) |
8154da3d TY |
3560 | return -EOPNOTSUPP; |
3561 | ||
ba937127 JB |
3562 | /* |
3563 | * Only xbs will be used on indexed trees. xis doesn't need a | |
3564 | * bucket. | |
3565 | */ | |
3566 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3567 | if (!xbs.bucket) { | |
3568 | mlog_errno(-ENOMEM); | |
3569 | return -ENOMEM; | |
3570 | } | |
3571 | ||
8818efaa ER |
3572 | had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 1, &oh); |
3573 | if (had_lock < 0) { | |
3574 | ret = had_lock; | |
cf1d6c76 | 3575 | mlog_errno(ret); |
ba937127 | 3576 | goto cleanup_nolock; |
cf1d6c76 TY |
3577 | } |
3578 | xis.inode_bh = xbs.inode_bh = di_bh; | |
3579 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3580 | ||
3581 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3582 | /* | |
3583 | * Scan inode and external block to find the same name | |
25985edc | 3584 | * extended attribute and collect search information. |
cf1d6c76 TY |
3585 | */ |
3586 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3587 | if (ret) | |
3588 | goto cleanup; | |
3589 | if (xis.not_found) { | |
3590 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3591 | if (ret) | |
3592 | goto cleanup; | |
3593 | } | |
3594 | ||
3595 | if (xis.not_found && xbs.not_found) { | |
3596 | ret = -ENODATA; | |
3597 | if (flags & XATTR_REPLACE) | |
3598 | goto cleanup; | |
3599 | ret = 0; | |
3600 | if (!value) | |
3601 | goto cleanup; | |
3602 | } else { | |
3603 | ret = -EEXIST; | |
3604 | if (flags & XATTR_CREATE) | |
3605 | goto cleanup; | |
3606 | } | |
3607 | ||
25985edc | 3608 | /* Check whether the value is refcounted and do some preparation. */ |
84e40080 | 3609 | if (ocfs2_is_refcount_inode(inode) && |
492a8a33 TM |
3610 | (!xis.not_found || !xbs.not_found)) { |
3611 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
3612 | &xis, &xbs, &ref_tree, | |
3613 | &ref_meta, &ref_credits); | |
3614 | if (ret) { | |
3615 | mlog_errno(ret); | |
3616 | goto cleanup; | |
3617 | } | |
3618 | } | |
85db90e7 | 3619 | |
5955102c | 3620 | inode_lock(tl_inode); |
85db90e7 TM |
3621 | |
3622 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
3623 | ret = __ocfs2_flush_truncate_log(osb); | |
3624 | if (ret < 0) { | |
5955102c | 3625 | inode_unlock(tl_inode); |
85db90e7 TM |
3626 | mlog_errno(ret); |
3627 | goto cleanup; | |
3628 | } | |
3629 | } | |
5955102c | 3630 | inode_unlock(tl_inode); |
85db90e7 TM |
3631 | |
3632 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3633 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3634 | if (ret) { |
3635 | mlog_errno(ret); | |
3636 | goto cleanup; | |
3637 | } | |
3638 | ||
4b3f6209 TM |
3639 | /* we need to update inode's ctime field, so add credit for it. */ |
3640 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3641 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3642 | if (IS_ERR(ctxt.handle)) { |
3643 | ret = PTR_ERR(ctxt.handle); | |
3644 | mlog_errno(ret); | |
6ea437a3 | 3645 | goto out_free_ac; |
cf1d6c76 | 3646 | } |
85db90e7 TM |
3647 | |
3648 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
6fdb702d | 3649 | ocfs2_update_inode_fsync_trans(ctxt.handle, inode, 0); |
85db90e7 TM |
3650 | |
3651 | ocfs2_commit_trans(osb, ctxt.handle); | |
3652 | ||
6ea437a3 | 3653 | out_free_ac: |
78f30c31 TM |
3654 | if (ctxt.data_ac) |
3655 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3656 | if (ctxt.meta_ac) | |
3657 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3658 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3659 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3660 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3661 | |
cf1d6c76 | 3662 | cleanup: |
492a8a33 TM |
3663 | if (ref_tree) |
3664 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3665 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3666 | if (!value && !ret) { |
3667 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3668 | if (ret) | |
3669 | mlog_errno(ret); | |
3670 | } | |
8818efaa | 3671 | ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock); |
ba937127 | 3672 | cleanup_nolock: |
cf1d6c76 TY |
3673 | brelse(di_bh); |
3674 | brelse(xbs.xattr_bh); | |
ba937127 | 3675 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3676 | |
3677 | return ret; | |
3678 | } | |
3679 | ||
0c044f0b TM |
3680 | /* |
3681 | * Find the xattr extent rec which may contains name_hash. | |
3682 | * e_cpos will be the first name hash of the xattr rec. | |
3683 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3684 | */ | |
3685 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3686 | u32 name_hash, | |
3687 | u64 *p_blkno, | |
3688 | u32 *e_cpos, | |
3689 | u32 *num_clusters, | |
3690 | struct ocfs2_extent_list *el) | |
3691 | { | |
3692 | int ret = 0, i; | |
3693 | struct buffer_head *eb_bh = NULL; | |
3694 | struct ocfs2_extent_block *eb; | |
3695 | struct ocfs2_extent_rec *rec = NULL; | |
3696 | u64 e_blkno = 0; | |
3697 | ||
3698 | if (el->l_tree_depth) { | |
facdb77f JB |
3699 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3700 | &eb_bh); | |
0c044f0b TM |
3701 | if (ret) { |
3702 | mlog_errno(ret); | |
3703 | goto out; | |
3704 | } | |
3705 | ||
3706 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3707 | el = &eb->h_list; | |
3708 | ||
3709 | if (el->l_tree_depth) { | |
17a5b9ab | 3710 | ret = ocfs2_error(inode->i_sb, |
7ecef14a JP |
3711 | "Inode %lu has non zero tree depth in xattr tree block %llu\n", |
3712 | inode->i_ino, | |
3713 | (unsigned long long)eb_bh->b_blocknr); | |
0c044f0b TM |
3714 | goto out; |
3715 | } | |
3716 | } | |
3717 | ||
3718 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3719 | rec = &el->l_recs[i]; | |
3720 | ||
3721 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3722 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3723 | break; | |
3724 | } | |
3725 | } | |
3726 | ||
3727 | if (!e_blkno) { | |
7ecef14a JP |
3728 | ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in xattr\n", |
3729 | inode->i_ino, | |
3730 | le32_to_cpu(rec->e_cpos), | |
3731 | ocfs2_rec_clusters(el, rec)); | |
0c044f0b TM |
3732 | goto out; |
3733 | } | |
3734 | ||
3735 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3736 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3737 | if (e_cpos) | |
3738 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3739 | out: | |
3740 | brelse(eb_bh); | |
3741 | return ret; | |
3742 | } | |
3743 | ||
3744 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3745 | struct ocfs2_xattr_bucket *bucket, | |
3746 | void *para); | |
3747 | ||
589dc260 | 3748 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3749 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3750 | int name_index, |
3751 | const char *name, | |
3752 | u32 name_hash, | |
3753 | u16 *xe_index, | |
3754 | int *found) | |
3755 | { | |
3756 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3757 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3758 | size_t name_len = strlen(name); |
3759 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3760 | char *xe_name; |
3761 | ||
3762 | /* | |
3763 | * We don't use binary search in the bucket because there | |
3764 | * may be multiple entries with the same name hash. | |
3765 | */ | |
3766 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3767 | xe = &xh->xh_entries[i]; | |
3768 | ||
3769 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3770 | continue; | |
3771 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3772 | break; | |
3773 | ||
3774 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3775 | if (!cmp) | |
3776 | cmp = name_len - xe->xe_name_len; | |
3777 | if (cmp) | |
3778 | continue; | |
3779 | ||
fd68a894 | 3780 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3781 | xh, |
3782 | i, | |
3783 | &block_off, | |
3784 | &new_offset); | |
3785 | if (ret) { | |
3786 | mlog_errno(ret); | |
3787 | break; | |
3788 | } | |
3789 | ||
970e4936 | 3790 | |
e2356a3f JB |
3791 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3792 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3793 | *xe_index = i; |
3794 | *found = 1; | |
3795 | ret = 0; | |
3796 | break; | |
3797 | } | |
3798 | } | |
3799 | ||
3800 | return ret; | |
3801 | } | |
3802 | ||
3803 | /* | |
3804 | * Find the specified xattr entry in a series of buckets. | |
3805 | * This series start from p_blkno and last for num_clusters. | |
3806 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3807 | * the num of the valid buckets. | |
3808 | * | |
3809 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3810 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3811 | */ | |
3812 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3813 | int name_index, | |
3814 | const char *name, | |
3815 | u32 name_hash, | |
3816 | u64 p_blkno, | |
3817 | u32 first_hash, | |
3818 | u32 num_clusters, | |
3819 | struct ocfs2_xattr_search *xs) | |
3820 | { | |
3821 | int ret, found = 0; | |
589dc260 TM |
3822 | struct ocfs2_xattr_header *xh = NULL; |
3823 | struct ocfs2_xattr_entry *xe = NULL; | |
3824 | u16 index = 0; | |
3825 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3826 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3827 | struct ocfs2_xattr_bucket *search; |
e2356a3f | 3828 | u64 blkno, lower_blkno = 0; |
589dc260 | 3829 | |
e2356a3f JB |
3830 | search = ocfs2_xattr_bucket_new(inode); |
3831 | if (!search) { | |
3832 | ret = -ENOMEM; | |
3833 | mlog_errno(ret); | |
3834 | goto out; | |
3835 | } | |
3836 | ||
3837 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3838 | if (ret) { |
3839 | mlog_errno(ret); | |
3840 | goto out; | |
3841 | } | |
3842 | ||
e2356a3f | 3843 | xh = bucket_xh(search); |
589dc260 | 3844 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3845 | while (low_bucket <= high_bucket) { |
e2356a3f | 3846 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3847 | |
e2356a3f | 3848 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3849 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3850 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3851 | if (ret) { |
3852 | mlog_errno(ret); | |
3853 | goto out; | |
3854 | } | |
3855 | ||
e2356a3f | 3856 | xh = bucket_xh(search); |
589dc260 TM |
3857 | xe = &xh->xh_entries[0]; |
3858 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3859 | high_bucket = bucket - 1; | |
3860 | continue; | |
3861 | } | |
3862 | ||
3863 | /* | |
3864 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3865 | * bucket is larger than the search one. for an empty |
3866 | * bucket, the last one is also the first one. | |
589dc260 | 3867 | */ |
5a095611 TM |
3868 | if (xh->xh_count) |
3869 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3870 | ||
e2356a3f JB |
3871 | /* record lower_blkno which may be the insert place. */ |
3872 | lower_blkno = blkno; | |
589dc260 TM |
3873 | |
3874 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3875 | low_bucket = bucket + 1; | |
3876 | continue; | |
3877 | } | |
3878 | ||
3879 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3880 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3881 | name_index, name, name_hash, |
3882 | &index, &found); | |
3883 | if (ret) { | |
3884 | mlog_errno(ret); | |
3885 | goto out; | |
3886 | } | |
3887 | break; | |
3888 | } | |
3889 | ||
3890 | /* | |
3891 | * Record the bucket we have found. | |
3892 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3893 | * always set it to the previous bucket. | |
3894 | */ | |
e2356a3f JB |
3895 | if (!lower_blkno) |
3896 | lower_blkno = p_blkno; | |
3897 | ||
3898 | /* This should be in cache - we just read it during the search */ | |
3899 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3900 | if (ret) { | |
3901 | mlog_errno(ret); | |
3902 | goto out; | |
589dc260 | 3903 | } |
589dc260 | 3904 | |
ba937127 JB |
3905 | xs->header = bucket_xh(xs->bucket); |
3906 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3907 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3908 | ||
3909 | if (found) { | |
589dc260 | 3910 | xs->here = &xs->header->xh_entries[index]; |
402b4183 TM |
3911 | trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno, |
3912 | name, name_index, name_hash, | |
3913 | (unsigned long long)bucket_blkno(xs->bucket), | |
3914 | index); | |
589dc260 TM |
3915 | } else |
3916 | ret = -ENODATA; | |
3917 | ||
3918 | out: | |
e2356a3f | 3919 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3920 | return ret; |
3921 | } | |
3922 | ||
3923 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3924 | struct buffer_head *root_bh, | |
3925 | int name_index, | |
3926 | const char *name, | |
3927 | struct ocfs2_xattr_search *xs) | |
3928 | { | |
3929 | int ret; | |
3930 | struct ocfs2_xattr_block *xb = | |
3931 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3932 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3933 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3934 | u64 p_blkno = 0; | |
3935 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3936 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3937 | |
3938 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3939 | return -ENODATA; | |
3940 | ||
402b4183 TM |
3941 | trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno, |
3942 | name, name_index, name_hash, | |
3943 | (unsigned long long)root_bh->b_blocknr, | |
3944 | -1); | |
589dc260 TM |
3945 | |
3946 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3947 | &num_clusters, el); | |
3948 | if (ret) { | |
3949 | mlog_errno(ret); | |
3950 | goto out; | |
3951 | } | |
3952 | ||
3953 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3954 | ||
402b4183 TM |
3955 | trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno, |
3956 | name, name_index, first_hash, | |
3957 | (unsigned long long)p_blkno, | |
3958 | num_clusters); | |
589dc260 TM |
3959 | |
3960 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3961 | p_blkno, first_hash, num_clusters, xs); | |
3962 | ||
3963 | out: | |
3964 | return ret; | |
3965 | } | |
3966 | ||
0c044f0b TM |
3967 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3968 | u64 blkno, | |
3969 | u32 clusters, | |
3970 | xattr_bucket_func *func, | |
3971 | void *para) | |
3972 | { | |
6dde41d9 | 3973 | int i, ret = 0; |
0c044f0b TM |
3974 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3975 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3976 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3977 | |
ba937127 JB |
3978 | bucket = ocfs2_xattr_bucket_new(inode); |
3979 | if (!bucket) { | |
3980 | mlog_errno(-ENOMEM); | |
3981 | return -ENOMEM; | |
3982 | } | |
0c044f0b | 3983 | |
402b4183 TM |
3984 | trace_ocfs2_iterate_xattr_buckets( |
3985 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
3986 | (unsigned long long)blkno, clusters); | |
0c044f0b | 3987 | |
ba937127 JB |
3988 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3989 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3990 | if (ret) { |
3991 | mlog_errno(ret); | |
ba937127 | 3992 | break; |
0c044f0b TM |
3993 | } |
3994 | ||
0c044f0b TM |
3995 | /* |
3996 | * The real bucket num in this series of blocks is stored | |
3997 | * in the 1st bucket. | |
3998 | */ | |
3999 | if (i == 0) | |
ba937127 | 4000 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 4001 | |
402b4183 | 4002 | trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno, |
ba937127 | 4003 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 4004 | if (func) { |
ba937127 | 4005 | ret = func(inode, bucket, para); |
a46fa684 | 4006 | if (ret && ret != -ERANGE) |
0c044f0b | 4007 | mlog_errno(ret); |
ba937127 | 4008 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
4009 | } |
4010 | ||
ba937127 JB |
4011 | ocfs2_xattr_bucket_relse(bucket); |
4012 | if (ret) | |
4013 | break; | |
0c044f0b TM |
4014 | } |
4015 | ||
ba937127 | 4016 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
4017 | return ret; |
4018 | } | |
4019 | ||
4020 | struct ocfs2_xattr_tree_list { | |
4021 | char *buffer; | |
4022 | size_t buffer_size; | |
936b8834 | 4023 | size_t result; |
0c044f0b TM |
4024 | }; |
4025 | ||
fd68a894 | 4026 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
4027 | struct ocfs2_xattr_header *xh, |
4028 | int index, | |
4029 | int *block_off, | |
4030 | int *new_offset) | |
4031 | { | |
4032 | u16 name_offset; | |
4033 | ||
4034 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
4035 | return -EINVAL; | |
4036 | ||
4037 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
4038 | ||
fd68a894 TM |
4039 | *block_off = name_offset >> sb->s_blocksize_bits; |
4040 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
4041 | |
4042 | return 0; | |
4043 | } | |
4044 | ||
4045 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
4046 | struct ocfs2_xattr_bucket *bucket, | |
4047 | void *para) | |
4048 | { | |
936b8834 | 4049 | int ret = 0, type; |
0c044f0b | 4050 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 4051 | int i, block_off, new_offset; |
1046cb11 | 4052 | const char *name; |
0c044f0b | 4053 | |
3e632946 JB |
4054 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
4055 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 | 4056 | type = ocfs2_xattr_get_type(entry); |
0c044f0b | 4057 | |
1046cb11 AG |
4058 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
4059 | bucket_xh(bucket), | |
4060 | i, | |
4061 | &block_off, | |
4062 | &new_offset); | |
4063 | if (ret) | |
4064 | break; | |
936b8834 | 4065 | |
1046cb11 AG |
4066 | name = (const char *)bucket_block(bucket, block_off) + |
4067 | new_offset; | |
4068 | ret = ocfs2_xattr_list_entry(inode->i_sb, | |
4069 | xl->buffer, | |
4070 | xl->buffer_size, | |
4071 | &xl->result, | |
4072 | type, name, | |
4073 | entry->xe_name_len); | |
4074 | if (ret) | |
4075 | break; | |
0c044f0b TM |
4076 | } |
4077 | ||
4078 | return ret; | |
4079 | } | |
4080 | ||
47bca495 TM |
4081 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
4082 | struct buffer_head *blk_bh, | |
4083 | xattr_tree_rec_func *rec_func, | |
4084 | void *para) | |
0c044f0b | 4085 | { |
47bca495 TM |
4086 | struct ocfs2_xattr_block *xb = |
4087 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
4088 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
4089 | int ret = 0; |
4090 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
4091 | u64 p_blkno = 0; | |
0c044f0b | 4092 | |
47bca495 | 4093 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
4094 | return 0; |
4095 | ||
4096 | while (name_hash > 0) { | |
4097 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4098 | &e_cpos, &num_clusters, el); | |
4099 | if (ret) { | |
4100 | mlog_errno(ret); | |
47bca495 | 4101 | break; |
0c044f0b TM |
4102 | } |
4103 | ||
47bca495 TM |
4104 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
4105 | num_clusters, para); | |
0c044f0b | 4106 | if (ret) { |
a46fa684 TM |
4107 | if (ret != -ERANGE) |
4108 | mlog_errno(ret); | |
47bca495 | 4109 | break; |
0c044f0b TM |
4110 | } |
4111 | ||
4112 | if (e_cpos == 0) | |
4113 | break; | |
4114 | ||
4115 | name_hash = e_cpos - 1; | |
4116 | } | |
4117 | ||
47bca495 TM |
4118 | return ret; |
4119 | ||
4120 | } | |
4121 | ||
4122 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
4123 | struct buffer_head *root_bh, | |
4124 | u64 blkno, u32 cpos, u32 len, void *para) | |
4125 | { | |
4126 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
4127 | ocfs2_list_xattr_bucket, para); | |
4128 | } | |
4129 | ||
4130 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
4131 | struct buffer_head *blk_bh, | |
4132 | char *buffer, | |
4133 | size_t buffer_size) | |
4134 | { | |
4135 | int ret; | |
4136 | struct ocfs2_xattr_tree_list xl = { | |
4137 | .buffer = buffer, | |
4138 | .buffer_size = buffer_size, | |
4139 | .result = 0, | |
4140 | }; | |
4141 | ||
4142 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
4143 | ocfs2_list_xattr_tree_rec, &xl); | |
4144 | if (ret) { | |
4145 | mlog_errno(ret); | |
4146 | goto out; | |
4147 | } | |
4148 | ||
936b8834 | 4149 | ret = xl.result; |
0c044f0b TM |
4150 | out: |
4151 | return ret; | |
4152 | } | |
01225596 TM |
4153 | |
4154 | static int cmp_xe(const void *a, const void *b) | |
4155 | { | |
4156 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4157 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
4158 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
4159 | ||
4160 | if (l_hash > r_hash) | |
4161 | return 1; | |
4162 | if (l_hash < r_hash) | |
4163 | return -1; | |
4164 | return 0; | |
4165 | } | |
4166 | ||
4167 | static void swap_xe(void *a, void *b, int size) | |
4168 | { | |
4169 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
4170 | ||
4171 | tmp = *l; | |
4172 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
4173 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
4174 | } | |
4175 | ||
4176 | /* | |
4177 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
4178 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
4179 | * The header goes at the start of the bucket, and the names+values are |
4180 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
4181 | * Note: we need to sort the entries since they are not saved in order |
4182 | * in the ocfs2_xattr_block. | |
4183 | */ | |
4184 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
4185 | struct buffer_head *xb_bh, | |
178eeac3 | 4186 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
4187 | { |
4188 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 4189 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
4190 | u16 offset, size, off_change; |
4191 | struct ocfs2_xattr_entry *xe; | |
4192 | struct ocfs2_xattr_block *xb = | |
4193 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4194 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 4195 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4196 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
4197 | char *src = xb_bh->b_data; |
4198 | char *target = bucket_block(bucket, blks - 1); | |
01225596 | 4199 | |
402b4183 TM |
4200 | trace_ocfs2_cp_xattr_block_to_bucket_begin( |
4201 | (unsigned long long)xb_bh->b_blocknr, | |
4202 | (unsigned long long)bucket_blkno(bucket)); | |
178eeac3 JB |
4203 | |
4204 | for (i = 0; i < blks; i++) | |
4205 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 4206 | |
01225596 TM |
4207 | /* |
4208 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
4209 | * there is a offset change corresponding to the change of | |
4210 | * ocfs2_xattr_header's position. | |
4211 | */ | |
4212 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4213 | xe = &xb_xh->xh_entries[count - 1]; | |
4214 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
4215 | size = blocksize - offset; | |
4216 | ||
4217 | /* copy all the names and values. */ | |
01225596 TM |
4218 | memcpy(target + offset, src + offset, size); |
4219 | ||
4220 | /* Init new header now. */ | |
4221 | xh->xh_count = xb_xh->xh_count; | |
4222 | xh->xh_num_buckets = cpu_to_le16(1); | |
4223 | xh->xh_name_value_len = cpu_to_le16(size); | |
4224 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
4225 | ||
4226 | /* copy all the entries. */ | |
178eeac3 | 4227 | target = bucket_block(bucket, 0); |
01225596 TM |
4228 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
4229 | size = count * sizeof(struct ocfs2_xattr_entry); | |
4230 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
4231 | ||
4232 | /* Change the xe offset for all the xe because of the move. */ | |
4233 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
4234 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4235 | for (i = 0; i < count; i++) | |
4236 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
4237 | ||
402b4183 | 4238 | trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change); |
01225596 TM |
4239 | |
4240 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
4241 | cmp_xe, swap_xe); | |
4242 | } | |
4243 | ||
4244 | /* | |
4245 | * After we move xattr from block to index btree, we have to | |
4246 | * update ocfs2_xattr_search to the new xe and base. | |
4247 | * | |
4248 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
4249 | * While if the entry is in index b-tree, "bucket" indicates the | |
4250 | * real place of the xattr. | |
4251 | */ | |
178eeac3 JB |
4252 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
4253 | struct ocfs2_xattr_search *xs, | |
4254 | struct buffer_head *old_bh) | |
01225596 | 4255 | { |
01225596 TM |
4256 | char *buf = old_bh->b_data; |
4257 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
4258 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 4259 | int i; |
01225596 | 4260 | |
ba937127 | 4261 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 4262 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
4263 | xs->end = xs->base + inode->i_sb->s_blocksize; |
4264 | ||
178eeac3 JB |
4265 | if (xs->not_found) |
4266 | return; | |
01225596 | 4267 | |
178eeac3 JB |
4268 | i = xs->here - old_xh->xh_entries; |
4269 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
4270 | } |
4271 | ||
4272 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
4273 | struct ocfs2_xattr_search *xs, |
4274 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4275 | { |
85db90e7 | 4276 | int ret; |
01225596 TM |
4277 | u32 bit_off, len; |
4278 | u64 blkno; | |
85db90e7 | 4279 | handle_t *handle = ctxt->handle; |
01225596 | 4280 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
01225596 TM |
4281 | struct buffer_head *xb_bh = xs->xattr_bh; |
4282 | struct ocfs2_xattr_block *xb = | |
4283 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4284 | struct ocfs2_xattr_tree_root *xr; | |
4285 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 | 4286 | |
402b4183 TM |
4287 | trace_ocfs2_xattr_create_index_block_begin( |
4288 | (unsigned long long)xb_bh->b_blocknr); | |
01225596 TM |
4289 | |
4290 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 4291 | BUG_ON(!xs->bucket); |
01225596 | 4292 | |
01225596 TM |
4293 | /* |
4294 | * XXX: | |
4295 | * We can use this lock for now, and maybe move to a dedicated mutex | |
4296 | * if performance becomes a problem later. | |
4297 | */ | |
4298 | down_write(&oi->ip_alloc_sem); | |
4299 | ||
0cf2f763 | 4300 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 4301 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4302 | if (ret) { |
4303 | mlog_errno(ret); | |
85db90e7 | 4304 | goto out; |
01225596 TM |
4305 | } |
4306 | ||
1ed9b777 | 4307 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, |
78f30c31 | 4308 | 1, 1, &bit_off, &len); |
01225596 TM |
4309 | if (ret) { |
4310 | mlog_errno(ret); | |
85db90e7 | 4311 | goto out; |
01225596 TM |
4312 | } |
4313 | ||
4314 | /* | |
4315 | * The bucket may spread in many blocks, and | |
4316 | * we will only touch the 1st block and the last block | |
4317 | * in the whole bucket(one for entry and one for data). | |
4318 | */ | |
4319 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
4320 | ||
402b4183 | 4321 | trace_ocfs2_xattr_create_index_block((unsigned long long)blkno); |
01225596 | 4322 | |
9c339255 | 4323 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno, 1); |
178eeac3 | 4324 | if (ret) { |
01225596 | 4325 | mlog_errno(ret); |
85db90e7 | 4326 | goto out; |
01225596 TM |
4327 | } |
4328 | ||
178eeac3 JB |
4329 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
4330 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
4331 | if (ret) { |
4332 | mlog_errno(ret); | |
85db90e7 | 4333 | goto out; |
01225596 TM |
4334 | } |
4335 | ||
178eeac3 JB |
4336 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
4337 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 4338 | |
178eeac3 | 4339 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
4340 | |
4341 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
4342 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
4343 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
4344 | ||
4345 | xr = &xb->xb_attrs.xb_root; | |
4346 | xr->xt_clusters = cpu_to_le32(1); | |
4347 | xr->xt_last_eb_blk = 0; | |
4348 | xr->xt_list.l_tree_depth = 0; | |
4349 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
4350 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
4351 | ||
4352 | xr->xt_list.l_recs[0].e_cpos = 0; | |
4353 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
4354 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
4355 | ||
4356 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
4357 | ||
85db90e7 | 4358 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 4359 | |
85db90e7 | 4360 | out: |
01225596 TM |
4361 | up_write(&oi->ip_alloc_sem); |
4362 | ||
01225596 TM |
4363 | return ret; |
4364 | } | |
4365 | ||
4366 | static int cmp_xe_offset(const void *a, const void *b) | |
4367 | { | |
4368 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4369 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
4370 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
4371 | ||
4372 | if (l_name_offset < r_name_offset) | |
4373 | return 1; | |
4374 | if (l_name_offset > r_name_offset) | |
4375 | return -1; | |
4376 | return 0; | |
4377 | } | |
4378 | ||
4379 | /* | |
4380 | * defrag a xattr bucket if we find that the bucket has some | |
4381 | * holes beteen name/value pairs. | |
4382 | * We will move all the name/value pairs to the end of the bucket | |
4383 | * so that we can spare some space for insertion. | |
4384 | */ | |
4385 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 4386 | handle_t *handle, |
01225596 TM |
4387 | struct ocfs2_xattr_bucket *bucket) |
4388 | { | |
4389 | int ret, i; | |
199799a3 | 4390 | size_t end, offset, len; |
01225596 TM |
4391 | struct ocfs2_xattr_header *xh; |
4392 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 4393 | u64 blkno = bucket_blkno(bucket); |
01225596 | 4394 | u16 xh_free_start; |
01225596 | 4395 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 4396 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
4397 | |
4398 | /* | |
4399 | * In order to make the operation more efficient and generic, | |
4400 | * we copy all the blocks into a contiguous memory and do the | |
4401 | * defragment there, so if anything is error, we will not touch | |
4402 | * the real block. | |
4403 | */ | |
4404 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
4405 | if (!bucket_buf) { | |
4406 | ret = -EIO; | |
4407 | goto out; | |
4408 | } | |
4409 | ||
4410 | buf = bucket_buf; | |
1c32a2fd TM |
4411 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4412 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 4413 | |
1c32a2fd | 4414 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
4415 | OCFS2_JOURNAL_ACCESS_WRITE); |
4416 | if (ret < 0) { | |
4417 | mlog_errno(ret); | |
85db90e7 | 4418 | goto out; |
01225596 TM |
4419 | } |
4420 | ||
4421 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
4422 | entries = (char *)xh->xh_entries; | |
4423 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4424 | ||
402b4183 | 4425 | trace_ocfs2_defrag_xattr_bucket( |
de29c085 MF |
4426 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
4427 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
4428 | |
4429 | /* | |
4430 | * sort all the entries by their offset. | |
4431 | * the largest will be the first, so that we can | |
4432 | * move them to the end one by one. | |
4433 | */ | |
4434 | sort(entries, le16_to_cpu(xh->xh_count), | |
4435 | sizeof(struct ocfs2_xattr_entry), | |
4436 | cmp_xe_offset, swap_xe); | |
4437 | ||
4438 | /* Move all name/values to the end of the bucket. */ | |
4439 | xe = xh->xh_entries; | |
4440 | end = OCFS2_XATTR_BUCKET_SIZE; | |
4441 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
4442 | offset = le16_to_cpu(xe->xe_name_offset); | |
199799a3 | 4443 | len = namevalue_size_xe(xe); |
01225596 TM |
4444 | |
4445 | /* | |
4446 | * We must make sure that the name/value pair | |
4447 | * exist in the same block. So adjust end to | |
4448 | * the previous block end if needed. | |
4449 | */ | |
4450 | if (((end - len) / blocksize != | |
4451 | (end - 1) / blocksize)) | |
4452 | end = end - end % blocksize; | |
4453 | ||
4454 | if (end > offset + len) { | |
4455 | memmove(bucket_buf + end - len, | |
4456 | bucket_buf + offset, len); | |
4457 | xe->xe_name_offset = cpu_to_le16(end - len); | |
4458 | } | |
4459 | ||
4460 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
4461 | "bucket %llu\n", (unsigned long long)blkno); | |
4462 | ||
4463 | end -= len; | |
4464 | } | |
4465 | ||
4466 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
4467 | "bucket %llu\n", (unsigned long long)blkno); | |
4468 | ||
4469 | if (xh_free_start == end) | |
85db90e7 | 4470 | goto out; |
01225596 TM |
4471 | |
4472 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
4473 | xh->xh_free_start = cpu_to_le16(end); | |
4474 | ||
4475 | /* sort the entries by their name_hash. */ | |
4476 | sort(entries, le16_to_cpu(xh->xh_count), | |
4477 | sizeof(struct ocfs2_xattr_entry), | |
4478 | cmp_xe, swap_xe); | |
4479 | ||
4480 | buf = bucket_buf; | |
1c32a2fd TM |
4481 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4482 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
4483 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 4484 | |
01225596 | 4485 | out: |
01225596 TM |
4486 | kfree(bucket_buf); |
4487 | return ret; | |
4488 | } | |
4489 | ||
4490 | /* | |
b5c03e74 JB |
4491 | * prev_blkno points to the start of an existing extent. new_blkno |
4492 | * points to a newly allocated extent. Because we know each of our | |
4493 | * clusters contains more than bucket, we can easily split one cluster | |
4494 | * at a bucket boundary. So we take the last cluster of the existing | |
4495 | * extent and split it down the middle. We move the last half of the | |
4496 | * buckets in the last cluster of the existing extent over to the new | |
4497 | * extent. | |
01225596 | 4498 | * |
b5c03e74 JB |
4499 | * first_bh is the buffer at prev_blkno so we can update the existing |
4500 | * extent's bucket count. header_bh is the bucket were we were hoping | |
4501 | * to insert our xattr. If the bucket move places the target in the new | |
4502 | * extent, we'll update first_bh and header_bh after modifying the old | |
4503 | * extent. | |
4504 | * | |
4505 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
4506 | */ |
4507 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
4508 | handle_t *handle, | |
41cb8148 JB |
4509 | struct ocfs2_xattr_bucket *first, |
4510 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4511 | u64 new_blkno, |
01225596 TM |
4512 | u32 num_clusters, |
4513 | u32 *first_hash) | |
4514 | { | |
c58b6032 | 4515 | int ret; |
41cb8148 JB |
4516 | struct super_block *sb = inode->i_sb; |
4517 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
4518 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 4519 | int to_move = num_buckets / 2; |
c58b6032 | 4520 | u64 src_blkno; |
41cb8148 JB |
4521 | u64 last_cluster_blkno = bucket_blkno(first) + |
4522 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 4523 | |
41cb8148 JB |
4524 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
4525 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 4526 | |
402b4183 TM |
4527 | trace_ocfs2_mv_xattr_bucket_cross_cluster( |
4528 | (unsigned long long)last_cluster_blkno, | |
4529 | (unsigned long long)new_blkno); | |
01225596 | 4530 | |
41cb8148 | 4531 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
4532 | last_cluster_blkno, new_blkno, |
4533 | to_move, first_hash); | |
01225596 TM |
4534 | if (ret) { |
4535 | mlog_errno(ret); | |
4536 | goto out; | |
4537 | } | |
4538 | ||
c58b6032 JB |
4539 | /* This is the first bucket that got moved */ |
4540 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 4541 | |
b5c03e74 | 4542 | /* |
c58b6032 | 4543 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 4544 | * update first and target. |
b5c03e74 | 4545 | */ |
41cb8148 | 4546 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
4547 | /* Find the block for the new target bucket */ |
4548 | src_blkno = new_blkno + | |
41cb8148 JB |
4549 | (bucket_blkno(target) - src_blkno); |
4550 | ||
4551 | ocfs2_xattr_bucket_relse(first); | |
4552 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 4553 | |
b5c03e74 | 4554 | /* |
c58b6032 | 4555 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
4556 | * journal from ocfs2_cp_xattr_bucket(). |
4557 | */ | |
41cb8148 | 4558 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
4559 | if (ret) { |
4560 | mlog_errno(ret); | |
4561 | goto out; | |
4562 | } | |
41cb8148 JB |
4563 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
4564 | if (ret) | |
b5c03e74 | 4565 | mlog_errno(ret); |
01225596 | 4566 | |
01225596 TM |
4567 | } |
4568 | ||
01225596 | 4569 | out: |
01225596 TM |
4570 | return ret; |
4571 | } | |
4572 | ||
01225596 | 4573 | /* |
80bcaf34 TM |
4574 | * Find the suitable pos when we divide a bucket into 2. |
4575 | * We have to make sure the xattrs with the same hash value exist | |
4576 | * in the same bucket. | |
4577 | * | |
4578 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
4579 | * place where the hash value changes. Try to find the most even split. | |
4580 | * The most common case is that all entries have different hash values, | |
4581 | * and the first check we make will find a place to split. | |
4582 | */ | |
4583 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
4584 | { | |
4585 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
4586 | int count = le16_to_cpu(xh->xh_count); | |
4587 | int delta, middle = count / 2; | |
4588 | ||
4589 | /* | |
4590 | * We start at the middle. Each step gets farther away in both | |
4591 | * directions. We therefore hit the change in hash value | |
4592 | * nearest to the middle. Note that this loop does not execute for | |
4593 | * count < 2. | |
4594 | */ | |
4595 | for (delta = 0; delta < middle; delta++) { | |
4596 | /* Let's check delta earlier than middle */ | |
4597 | if (cmp_xe(&entries[middle - delta - 1], | |
4598 | &entries[middle - delta])) | |
4599 | return middle - delta; | |
4600 | ||
4601 | /* For even counts, don't walk off the end */ | |
4602 | if ((middle + delta + 1) == count) | |
4603 | continue; | |
4604 | ||
4605 | /* Now try delta past middle */ | |
4606 | if (cmp_xe(&entries[middle + delta], | |
4607 | &entries[middle + delta + 1])) | |
4608 | return middle + delta + 1; | |
4609 | } | |
4610 | ||
4611 | /* Every entry had the same hash */ | |
4612 | return count; | |
4613 | } | |
4614 | ||
4615 | /* | |
4616 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4617 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4618 | * |
4619 | * Normally half of the xattrs will be moved. But we have to make | |
4620 | * sure that the xattrs with the same hash value are stored in the | |
4621 | * same bucket. If all the xattrs in this bucket have the same hash | |
4622 | * value, the new bucket will be initialized as an empty one and the | |
4623 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4624 | */ |
80bcaf34 TM |
4625 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4626 | handle_t *handle, | |
4627 | u64 blk, | |
4628 | u64 new_blk, | |
4629 | u32 *first_hash, | |
4630 | int new_bucket_head) | |
01225596 TM |
4631 | { |
4632 | int ret, i; | |
199799a3 | 4633 | int count, start, len, name_value_len = 0, name_offset = 0; |
ba937127 | 4634 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4635 | struct ocfs2_xattr_header *xh; |
4636 | struct ocfs2_xattr_entry *xe; | |
4637 | int blocksize = inode->i_sb->s_blocksize; | |
4638 | ||
402b4183 TM |
4639 | trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk, |
4640 | (unsigned long long)new_blk); | |
01225596 | 4641 | |
ba937127 JB |
4642 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4643 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4644 | if (!s_bucket || !t_bucket) { | |
4645 | ret = -ENOMEM; | |
4646 | mlog_errno(ret); | |
4647 | goto out; | |
4648 | } | |
01225596 | 4649 | |
ba937127 | 4650 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4651 | if (ret) { |
4652 | mlog_errno(ret); | |
4653 | goto out; | |
4654 | } | |
4655 | ||
ba937127 | 4656 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4657 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4658 | if (ret) { |
4659 | mlog_errno(ret); | |
4660 | goto out; | |
4661 | } | |
4662 | ||
784b816a JB |
4663 | /* |
4664 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4665 | * there's no need to read it. | |
4666 | */ | |
9c339255 | 4667 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk, new_bucket_head); |
01225596 TM |
4668 | if (ret) { |
4669 | mlog_errno(ret); | |
4670 | goto out; | |
4671 | } | |
4672 | ||
2b656c1d JB |
4673 | /* |
4674 | * Hey, if we're overwriting t_bucket, what difference does | |
4675 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4676 | * same part of ocfs2_cp_xattr_bucket(). | |
4677 | */ | |
ba937127 | 4678 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4679 | new_bucket_head ? |
4680 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4681 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4682 | if (ret) { | |
4683 | mlog_errno(ret); | |
4684 | goto out; | |
01225596 TM |
4685 | } |
4686 | ||
ba937127 | 4687 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4688 | count = le16_to_cpu(xh->xh_count); |
4689 | start = ocfs2_xattr_find_divide_pos(xh); | |
4690 | ||
4691 | if (start == count) { | |
4692 | xe = &xh->xh_entries[start-1]; | |
4693 | ||
4694 | /* | |
4695 | * initialized a new empty bucket here. | |
4696 | * The hash value is set as one larger than | |
4697 | * that of the last entry in the previous bucket. | |
4698 | */ | |
ba937127 JB |
4699 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4700 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4701 | |
ba937127 | 4702 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4703 | xh->xh_free_start = cpu_to_le16(blocksize); |
4704 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4705 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4706 | ||
4707 | goto set_num_buckets; | |
4708 | } | |
4709 | ||
01225596 | 4710 | /* copy the whole bucket to the new first. */ |
ba937127 | 4711 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4712 | |
4713 | /* update the new bucket. */ | |
ba937127 | 4714 | xh = bucket_xh(t_bucket); |
01225596 TM |
4715 | |
4716 | /* | |
4717 | * Calculate the total name/value len and xh_free_start for | |
4718 | * the old bucket first. | |
4719 | */ | |
4720 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4721 | name_value_len = 0; | |
4722 | for (i = 0; i < start; i++) { | |
4723 | xe = &xh->xh_entries[i]; | |
199799a3 | 4724 | name_value_len += namevalue_size_xe(xe); |
01225596 TM |
4725 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) |
4726 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4727 | } | |
4728 | ||
4729 | /* | |
4730 | * Now begin the modification to the new bucket. | |
4731 | * | |
4732 | * In the new bucket, We just move the xattr entry to the beginning | |
4733 | * and don't touch the name/value. So there will be some holes in the | |
4734 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4735 | * called. | |
4736 | */ | |
4737 | xe = &xh->xh_entries[start]; | |
4738 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
402b4183 TM |
4739 | trace_ocfs2_divide_xattr_bucket_move(len, |
4740 | (int)((char *)xe - (char *)xh), | |
4741 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4742 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4743 | xe = &xh->xh_entries[count - start]; | |
4744 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4745 | memset((char *)xe, 0, len); | |
4746 | ||
4747 | le16_add_cpu(&xh->xh_count, -start); | |
4748 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4749 | ||
4750 | /* Calculate xh_free_start for the new bucket. */ | |
4751 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4752 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4753 | xe = &xh->xh_entries[i]; | |
01225596 TM |
4754 | if (le16_to_cpu(xe->xe_name_offset) < |
4755 | le16_to_cpu(xh->xh_free_start)) | |
4756 | xh->xh_free_start = xe->xe_name_offset; | |
4757 | } | |
4758 | ||
80bcaf34 | 4759 | set_num_buckets: |
01225596 TM |
4760 | /* set xh->xh_num_buckets for the new xh. */ |
4761 | if (new_bucket_head) | |
4762 | xh->xh_num_buckets = cpu_to_le16(1); | |
4763 | else | |
4764 | xh->xh_num_buckets = 0; | |
4765 | ||
ba937127 | 4766 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4767 | |
4768 | /* store the first_hash of the new bucket. */ | |
4769 | if (first_hash) | |
4770 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4771 | ||
4772 | /* | |
80bcaf34 TM |
4773 | * Now only update the 1st block of the old bucket. If we |
4774 | * just added a new empty bucket, there is no need to modify | |
4775 | * it. | |
01225596 | 4776 | */ |
80bcaf34 TM |
4777 | if (start == count) |
4778 | goto out; | |
4779 | ||
ba937127 | 4780 | xh = bucket_xh(s_bucket); |
01225596 TM |
4781 | memset(&xh->xh_entries[start], 0, |
4782 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4783 | xh->xh_count = cpu_to_le16(start); | |
4784 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4785 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4786 | ||
ba937127 | 4787 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4788 | |
4789 | out: | |
ba937127 JB |
4790 | ocfs2_xattr_bucket_free(s_bucket); |
4791 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4792 | |
4793 | return ret; | |
4794 | } | |
4795 | ||
4796 | /* | |
4797 | * Copy xattr from one bucket to another bucket. | |
4798 | * | |
4799 | * The caller must make sure that the journal transaction | |
4800 | * has enough space for journaling. | |
4801 | */ | |
4802 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4803 | handle_t *handle, | |
4804 | u64 s_blkno, | |
4805 | u64 t_blkno, | |
4806 | int t_is_new) | |
4807 | { | |
4980c6da | 4808 | int ret; |
ba937127 | 4809 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4810 | |
4811 | BUG_ON(s_blkno == t_blkno); | |
4812 | ||
402b4183 TM |
4813 | trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno, |
4814 | (unsigned long long)t_blkno, | |
4815 | t_is_new); | |
01225596 | 4816 | |
ba937127 JB |
4817 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4818 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4819 | if (!s_bucket || !t_bucket) { | |
4820 | ret = -ENOMEM; | |
4821 | mlog_errno(ret); | |
4822 | goto out; | |
4823 | } | |
92de109a | 4824 | |
ba937127 | 4825 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4826 | if (ret) |
4827 | goto out; | |
4828 | ||
784b816a JB |
4829 | /* |
4830 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4831 | * there's no need to read it. | |
4832 | */ | |
9c339255 | 4833 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno, t_is_new); |
01225596 TM |
4834 | if (ret) |
4835 | goto out; | |
4836 | ||
2b656c1d JB |
4837 | /* |
4838 | * Hey, if we're overwriting t_bucket, what difference does | |
4839 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4840 | * cluster to fill, we came here from |
4841 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4842 | * ACCESS_CREATE is required. But we also might have moved data | |
4843 | * out of t_bucket before extending back into it. | |
4844 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4845 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4846 | * and copied out the end of the old extent. Then it re-extends |
4847 | * the old extent back to create space for new xattrs. That's | |
4848 | * how we get here, and the bucket isn't really new. | |
4849 | */ | |
ba937127 | 4850 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4851 | t_is_new ? |
4852 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4853 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4854 | if (ret) | |
4855 | goto out; | |
01225596 | 4856 | |
ba937127 JB |
4857 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4858 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4859 | |
4860 | out: | |
ba937127 JB |
4861 | ocfs2_xattr_bucket_free(t_bucket); |
4862 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4863 | |
4864 | return ret; | |
4865 | } | |
4866 | ||
4867 | /* | |
874d65af JB |
4868 | * src_blk points to the start of an existing extent. last_blk points to |
4869 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4870 | * extent. We copy the buckets from the cluster at last_blk to the new |
4871 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4872 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4873 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4874 | * by the same amount. | |
01225596 | 4875 | */ |
54ecb6b6 JB |
4876 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4877 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4878 | unsigned int start_bucket, | |
4879 | u32 *first_hash) | |
01225596 TM |
4880 | { |
4881 | int i, ret, credits; | |
4882 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4883 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4884 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4885 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4886 | |
402b4183 TM |
4887 | trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk, |
4888 | (unsigned long long)to_blk); | |
01225596 | 4889 | |
54ecb6b6 JB |
4890 | BUG_ON(start_bucket >= num_buckets); |
4891 | if (start_bucket) { | |
4892 | num_buckets -= start_bucket; | |
4893 | last_blk += (start_bucket * blks_per_bucket); | |
4894 | } | |
4895 | ||
15d60929 JB |
4896 | /* The first bucket of the original extent */ |
4897 | old_first = ocfs2_xattr_bucket_new(inode); | |
4898 | /* The first bucket of the new extent */ | |
4899 | new_first = ocfs2_xattr_bucket_new(inode); | |
4900 | if (!old_first || !new_first) { | |
4901 | ret = -ENOMEM; | |
4902 | mlog_errno(ret); | |
4903 | goto out; | |
4904 | } | |
4905 | ||
874d65af | 4906 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4907 | if (ret) { |
4908 | mlog_errno(ret); | |
4909 | goto out; | |
4910 | } | |
4911 | ||
01225596 | 4912 | /* |
54ecb6b6 JB |
4913 | * We need to update the first bucket of the old extent and all |
4914 | * the buckets going to the new extent. | |
01225596 | 4915 | */ |
c901fb00 | 4916 | credits = ((num_buckets + 1) * blks_per_bucket); |
01225596 TM |
4917 | ret = ocfs2_extend_trans(handle, credits); |
4918 | if (ret) { | |
4919 | mlog_errno(ret); | |
4920 | goto out; | |
4921 | } | |
4922 | ||
15d60929 JB |
4923 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4924 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4925 | if (ret) { |
4926 | mlog_errno(ret); | |
4927 | goto out; | |
4928 | } | |
4929 | ||
4930 | for (i = 0; i < num_buckets; i++) { | |
4931 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4932 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4933 | to_blk + (i * blks_per_bucket), |
4934 | 1); | |
01225596 TM |
4935 | if (ret) { |
4936 | mlog_errno(ret); | |
4937 | goto out; | |
4938 | } | |
01225596 TM |
4939 | } |
4940 | ||
15d60929 JB |
4941 | /* |
4942 | * Get the new bucket ready before we dirty anything | |
4943 | * (This actually shouldn't fail, because we already dirtied | |
4944 | * it once in ocfs2_cp_xattr_bucket()). | |
4945 | */ | |
4946 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4947 | if (ret) { | |
01225596 TM |
4948 | mlog_errno(ret); |
4949 | goto out; | |
4950 | } | |
15d60929 JB |
4951 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4952 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4953 | if (ret) { |
4954 | mlog_errno(ret); | |
4955 | goto out; | |
4956 | } | |
4957 | ||
15d60929 JB |
4958 | /* Now update the headers */ |
4959 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4960 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4961 | |
15d60929 JB |
4962 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4963 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4964 | |
4965 | if (first_hash) | |
15d60929 JB |
4966 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4967 | ||
01225596 | 4968 | out: |
15d60929 JB |
4969 | ocfs2_xattr_bucket_free(new_first); |
4970 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4971 | return ret; |
4972 | } | |
4973 | ||
4974 | /* | |
80bcaf34 | 4975 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4976 | * This function should only be called when bucket size == cluster size. |
4977 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4978 | */ | |
80bcaf34 TM |
4979 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4980 | handle_t *handle, | |
4981 | u64 prev_blk, | |
4982 | u64 new_blk, | |
4983 | u32 *first_hash) | |
01225596 TM |
4984 | { |
4985 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
c901fb00 | 4986 | int ret, credits = 2 * blk_per_bucket; |
01225596 TM |
4987 | |
4988 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4989 | ||
4990 | ret = ocfs2_extend_trans(handle, credits); | |
4991 | if (ret) { | |
4992 | mlog_errno(ret); | |
4993 | return ret; | |
4994 | } | |
4995 | ||
4996 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4997 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4998 | new_blk, first_hash, 1); | |
01225596 TM |
4999 | } |
5000 | ||
5001 | /* | |
5002 | * Move some xattrs from the old cluster to the new one since they are not | |
5003 | * contiguous in ocfs2 xattr tree. | |
5004 | * | |
5005 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
5006 | * prev_blk to it. v_start will be set as the first name hash value in this | |
5007 | * new cluster so that it can be used as e_cpos during tree insertion and | |
5008 | * don't collide with our original b-tree operations. first_bh and header_bh | |
5009 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
5010 | * to extend the insert bucket. | |
5011 | * | |
5012 | * The problem is how much xattr should we move to the new one and when should | |
5013 | * we update first_bh and header_bh? | |
5014 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
5015 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
5016 | * update the first_bh and header_bh if the insert bucket has been moved | |
5017 | * to the new cluster. | |
5018 | * 2. If cluster_size == bucket_size: | |
5019 | * a) If the previous extent rec has more than one cluster and the insert | |
5020 | * place isn't in the last cluster, copy the entire last cluster to the | |
5021 | * new one. This time, we don't need to upate the first_bh and header_bh | |
5022 | * since they will not be moved into the new cluster. | |
5023 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
5024 | * the new one. And we set the extend flag to zero if the insert place is | |
5025 | * moved into the new allocated cluster since no extend is needed. | |
5026 | */ | |
5027 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
5028 | handle_t *handle, | |
012ee910 JB |
5029 | struct ocfs2_xattr_bucket *first, |
5030 | struct ocfs2_xattr_bucket *target, | |
01225596 | 5031 | u64 new_blk, |
01225596 TM |
5032 | u32 prev_clusters, |
5033 | u32 *v_start, | |
5034 | int *extend) | |
5035 | { | |
92cf3adf | 5036 | int ret; |
01225596 | 5037 | |
402b4183 TM |
5038 | trace_ocfs2_adjust_xattr_cross_cluster( |
5039 | (unsigned long long)bucket_blkno(first), | |
5040 | (unsigned long long)new_blk, prev_clusters); | |
01225596 | 5041 | |
41cb8148 | 5042 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
5043 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
5044 | handle, | |
41cb8148 | 5045 | first, target, |
01225596 | 5046 | new_blk, |
01225596 TM |
5047 | prev_clusters, |
5048 | v_start); | |
012ee910 | 5049 | if (ret) |
41cb8148 | 5050 | mlog_errno(ret); |
41cb8148 | 5051 | } else { |
92cf3adf JB |
5052 | /* The start of the last cluster in the first extent */ |
5053 | u64 last_blk = bucket_blkno(first) + | |
5054 | ((prev_clusters - 1) * | |
5055 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 5056 | |
012ee910 | 5057 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 5058 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 5059 | bucket_blkno(first), |
54ecb6b6 | 5060 | last_blk, new_blk, 0, |
01225596 | 5061 | v_start); |
012ee910 JB |
5062 | if (ret) |
5063 | mlog_errno(ret); | |
5064 | } else { | |
80bcaf34 TM |
5065 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
5066 | last_blk, new_blk, | |
5067 | v_start); | |
012ee910 JB |
5068 | if (ret) |
5069 | mlog_errno(ret); | |
01225596 | 5070 | |
92cf3adf | 5071 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
5072 | *extend = 0; |
5073 | } | |
5074 | } | |
5075 | ||
5076 | return ret; | |
5077 | } | |
5078 | ||
5079 | /* | |
5080 | * Add a new cluster for xattr storage. | |
5081 | * | |
5082 | * If the new cluster is contiguous with the previous one, it will be | |
5083 | * appended to the same extent record, and num_clusters will be updated. | |
5084 | * If not, we will insert a new extent for it and move some xattrs in | |
5085 | * the last cluster into the new allocated one. | |
5086 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
5087 | * lose the benefits of hashing because we'll have to search large leaves. | |
5088 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
5089 | * if it's bigger). | |
5090 | * | |
5091 | * first_bh is the first block of the previous extent rec and header_bh | |
5092 | * indicates the bucket we will insert the new xattrs. They will be updated | |
5093 | * when the header_bh is moved into the new cluster. | |
5094 | */ | |
5095 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
5096 | struct buffer_head *root_bh, | |
ed29c0ca JB |
5097 | struct ocfs2_xattr_bucket *first, |
5098 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
5099 | u32 *num_clusters, |
5100 | u32 prev_cpos, | |
78f30c31 TM |
5101 | int *extend, |
5102 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5103 | { |
85db90e7 | 5104 | int ret; |
01225596 TM |
5105 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
5106 | u32 prev_clusters = *num_clusters; | |
5107 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
5108 | u64 block; | |
85db90e7 | 5109 | handle_t *handle = ctxt->handle; |
01225596 | 5110 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 5111 | struct ocfs2_extent_tree et; |
01225596 | 5112 | |
402b4183 TM |
5113 | trace_ocfs2_add_new_xattr_cluster_begin( |
5114 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
5115 | (unsigned long long)bucket_blkno(first), | |
5116 | prev_cpos, prev_clusters); | |
01225596 | 5117 | |
5e404e9e | 5118 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 5119 | |
0cf2f763 | 5120 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5121 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5122 | if (ret < 0) { |
5123 | mlog_errno(ret); | |
5124 | goto leave; | |
5125 | } | |
5126 | ||
1ed9b777 | 5127 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1, |
01225596 TM |
5128 | clusters_to_add, &bit_off, &num_bits); |
5129 | if (ret < 0) { | |
5130 | if (ret != -ENOSPC) | |
5131 | mlog_errno(ret); | |
5132 | goto leave; | |
5133 | } | |
5134 | ||
5135 | BUG_ON(num_bits > clusters_to_add); | |
5136 | ||
5137 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
402b4183 | 5138 | trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits); |
01225596 | 5139 | |
ed29c0ca | 5140 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
5141 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
5142 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
5143 | /* | |
5144 | * If this cluster is contiguous with the old one and | |
5145 | * adding this new cluster, we don't surpass the limit of | |
5146 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
5147 | * initialized and used like other buckets in the previous | |
5148 | * cluster. | |
5149 | * So add it as a contiguous one. The caller will handle | |
5150 | * its init process. | |
5151 | */ | |
5152 | v_start = prev_cpos + prev_clusters; | |
5153 | *num_clusters = prev_clusters + num_bits; | |
01225596 TM |
5154 | } else { |
5155 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
5156 | handle, | |
012ee910 JB |
5157 | first, |
5158 | target, | |
01225596 | 5159 | block, |
01225596 TM |
5160 | prev_clusters, |
5161 | &v_start, | |
5162 | extend); | |
5163 | if (ret) { | |
5164 | mlog_errno(ret); | |
5165 | goto leave; | |
5166 | } | |
5167 | } | |
5168 | ||
402b4183 TM |
5169 | trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block, |
5170 | v_start, num_bits); | |
cc79d8c1 | 5171 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 5172 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
5173 | if (ret < 0) { |
5174 | mlog_errno(ret); | |
5175 | goto leave; | |
5176 | } | |
5177 | ||
ec20cec7 | 5178 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5179 | |
5180 | leave: | |
01225596 TM |
5181 | return ret; |
5182 | } | |
5183 | ||
5184 | /* | |
92de109a JB |
5185 | * We are given an extent. 'first' is the bucket at the very front of |
5186 | * the extent. The extent has space for an additional bucket past | |
5187 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
5188 | * of the target bucket. We wish to shift every bucket past the target | |
5189 | * down one, filling in that additional space. When we get back to the | |
5190 | * target, we split the target between itself and the now-empty bucket | |
5191 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
5192 | */ |
5193 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 5194 | handle_t *handle, |
92de109a JB |
5195 | struct ocfs2_xattr_bucket *first, |
5196 | u64 target_blk, | |
01225596 TM |
5197 | u32 num_clusters) |
5198 | { | |
5199 | int ret, credits; | |
5200 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5201 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
5202 | u64 end_blk; |
5203 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 | 5204 | |
402b4183 TM |
5205 | trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk, |
5206 | (unsigned long long)bucket_blkno(first), | |
5207 | num_clusters, new_bucket); | |
01225596 | 5208 | |
92de109a JB |
5209 | /* The extent must have room for an additional bucket */ |
5210 | BUG_ON(new_bucket >= | |
5211 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 5212 | |
92de109a JB |
5213 | /* end_blk points to the last existing bucket */ |
5214 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
5215 | |
5216 | /* | |
92de109a JB |
5217 | * end_blk is the start of the last existing bucket. |
5218 | * Thus, (end_blk - target_blk) covers the target bucket and | |
5219 | * every bucket after it up to, but not including, the last | |
5220 | * existing bucket. Then we add the last existing bucket, the | |
5221 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 5222 | */ |
c901fb00 | 5223 | credits = (end_blk - target_blk) + (3 * blk_per_bucket); |
85db90e7 TM |
5224 | ret = ocfs2_extend_trans(handle, credits); |
5225 | if (ret) { | |
01225596 TM |
5226 | mlog_errno(ret); |
5227 | goto out; | |
5228 | } | |
5229 | ||
92de109a JB |
5230 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
5231 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
5232 | if (ret) { |
5233 | mlog_errno(ret); | |
85db90e7 | 5234 | goto out; |
01225596 TM |
5235 | } |
5236 | ||
92de109a | 5237 | while (end_blk != target_blk) { |
01225596 TM |
5238 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
5239 | end_blk + blk_per_bucket, 0); | |
5240 | if (ret) | |
85db90e7 | 5241 | goto out; |
01225596 TM |
5242 | end_blk -= blk_per_bucket; |
5243 | } | |
5244 | ||
92de109a JB |
5245 | /* Move half of the xattr in target_blkno to the next bucket. */ |
5246 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
5247 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 5248 | |
92de109a JB |
5249 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
5250 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 5251 | |
01225596 TM |
5252 | out: |
5253 | return ret; | |
5254 | } | |
5255 | ||
5256 | /* | |
91f2033f JB |
5257 | * Add new xattr bucket in an extent record and adjust the buckets |
5258 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
5259 | * bucket we want to insert into. | |
01225596 | 5260 | * |
91f2033f JB |
5261 | * In the easy case, we will move all the buckets after target down by |
5262 | * one. Half of target's xattrs will be moved to the next bucket. | |
5263 | * | |
5264 | * If current cluster is full, we'll allocate a new one. This may not | |
5265 | * be contiguous. The underlying calls will make sure that there is | |
5266 | * space for the insert, shifting buckets around if necessary. | |
5267 | * 'target' may be moved by those calls. | |
01225596 TM |
5268 | */ |
5269 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
5270 | struct buffer_head *xb_bh, | |
91f2033f | 5271 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 5272 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 5273 | { |
01225596 TM |
5274 | struct ocfs2_xattr_block *xb = |
5275 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5276 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
5277 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
5278 | u32 name_hash = |
5279 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 5280 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
5281 | int ret, num_buckets, extend = 1; |
5282 | u64 p_blkno; | |
5283 | u32 e_cpos, num_clusters; | |
92de109a | 5284 | /* The bucket at the front of the extent */ |
91f2033f | 5285 | struct ocfs2_xattr_bucket *first; |
01225596 | 5286 | |
402b4183 TM |
5287 | trace_ocfs2_add_new_xattr_bucket( |
5288 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 5289 | |
ed29c0ca | 5290 | /* The first bucket of the original extent */ |
92de109a | 5291 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 5292 | if (!first) { |
92de109a JB |
5293 | ret = -ENOMEM; |
5294 | mlog_errno(ret); | |
5295 | goto out; | |
5296 | } | |
5297 | ||
01225596 TM |
5298 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
5299 | &num_clusters, el); | |
5300 | if (ret) { | |
5301 | mlog_errno(ret); | |
5302 | goto out; | |
5303 | } | |
5304 | ||
ed29c0ca | 5305 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
5306 | if (ret) { |
5307 | mlog_errno(ret); | |
5308 | goto out; | |
5309 | } | |
5310 | ||
ed29c0ca JB |
5311 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
5312 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
5313 | /* | |
5314 | * This can move first+target if the target bucket moves | |
5315 | * to the new extent. | |
5316 | */ | |
01225596 TM |
5317 | ret = ocfs2_add_new_xattr_cluster(inode, |
5318 | xb_bh, | |
ed29c0ca JB |
5319 | first, |
5320 | target, | |
01225596 TM |
5321 | &num_clusters, |
5322 | e_cpos, | |
78f30c31 TM |
5323 | &extend, |
5324 | ctxt); | |
01225596 TM |
5325 | if (ret) { |
5326 | mlog_errno(ret); | |
5327 | goto out; | |
5328 | } | |
5329 | } | |
5330 | ||
92de109a | 5331 | if (extend) { |
01225596 | 5332 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 5333 | ctxt->handle, |
ed29c0ca JB |
5334 | first, |
5335 | bucket_blkno(target), | |
01225596 | 5336 | num_clusters); |
92de109a JB |
5337 | if (ret) |
5338 | mlog_errno(ret); | |
5339 | } | |
5340 | ||
01225596 | 5341 | out: |
92de109a | 5342 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 5343 | |
01225596 TM |
5344 | return ret; |
5345 | } | |
5346 | ||
01225596 TM |
5347 | /* |
5348 | * Truncate the specified xe_off entry in xattr bucket. | |
5349 | * bucket is indicated by header_bh and len is the new length. | |
5350 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
5351 | * | |
5352 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
5353 | */ | |
5354 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 5355 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 5356 | int xe_off, |
78f30c31 TM |
5357 | int len, |
5358 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5359 | { |
5360 | int ret, offset; | |
5361 | u64 value_blk; | |
01225596 | 5362 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 5363 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 5364 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
5365 | struct ocfs2_xattr_value_buf vb = { |
5366 | .vb_access = ocfs2_journal_access, | |
5367 | }; | |
01225596 TM |
5368 | |
5369 | xe = &xh->xh_entries[xe_off]; | |
5370 | ||
5371 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
5372 | ||
5373 | offset = le16_to_cpu(xe->xe_name_offset) + | |
5374 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5375 | ||
5376 | value_blk = offset / blocksize; | |
5377 | ||
5378 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
5379 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 5380 | |
b3e5d379 JB |
5381 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
5382 | BUG_ON(!vb.vb_bh); | |
01225596 | 5383 | |
b3e5d379 JB |
5384 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
5385 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 5386 | |
548b0f22 JB |
5387 | /* |
5388 | * From here on out we have to dirty the bucket. The generic | |
5389 | * value calls only modify one of the bucket's bhs, but we need | |
5390 | * to send the bucket at once. So if they error, they *could* have | |
5391 | * modified something. We have to assume they did, and dirty | |
5392 | * the whole bucket. This leaves us in a consistent state. | |
5393 | */ | |
402b4183 TM |
5394 | trace_ocfs2_xattr_bucket_value_truncate( |
5395 | (unsigned long long)bucket_blkno(bucket), xe_off, len); | |
b3e5d379 | 5396 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
5397 | if (ret) { |
5398 | mlog_errno(ret); | |
554e7f9e TM |
5399 | goto out; |
5400 | } | |
5401 | ||
5402 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5403 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5404 | if (ret) { | |
5405 | mlog_errno(ret); | |
5406 | goto out; | |
01225596 TM |
5407 | } |
5408 | ||
548b0f22 JB |
5409 | xe->xe_value_size = cpu_to_le64(len); |
5410 | ||
548b0f22 JB |
5411 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5412 | ||
01225596 | 5413 | out: |
01225596 TM |
5414 | return ret; |
5415 | } | |
5416 | ||
01225596 TM |
5417 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5418 | struct buffer_head *root_bh, | |
5419 | u64 blkno, | |
5420 | u32 cpos, | |
47bca495 TM |
5421 | u32 len, |
5422 | void *para) | |
01225596 TM |
5423 | { |
5424 | int ret; | |
5425 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5426 | struct inode *tl_inode = osb->osb_tl_inode; | |
5427 | handle_t *handle; | |
5428 | struct ocfs2_xattr_block *xb = | |
5429 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5430 | struct ocfs2_alloc_context *meta_ac = NULL; |
5431 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5432 | struct ocfs2_extent_tree et; |
5433 | ||
47bca495 | 5434 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5435 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5436 | if (ret) { |
5437 | mlog_errno(ret); | |
5438 | return ret; | |
5439 | } | |
5440 | ||
5e404e9e | 5441 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5442 | |
5443 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5444 | ||
402b4183 TM |
5445 | trace_ocfs2_rm_xattr_cluster( |
5446 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
5447 | (unsigned long long)blkno, cpos, len); | |
01225596 | 5448 | |
8cb471e8 JB |
5449 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5450 | len); | |
01225596 | 5451 | |
f99b9b7c | 5452 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5453 | if (ret) { |
5454 | mlog_errno(ret); | |
5455 | return ret; | |
5456 | } | |
5457 | ||
5955102c | 5458 | inode_lock(tl_inode); |
01225596 TM |
5459 | |
5460 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5461 | ret = __ocfs2_flush_truncate_log(osb); | |
5462 | if (ret < 0) { | |
5463 | mlog_errno(ret); | |
5464 | goto out; | |
5465 | } | |
5466 | } | |
5467 | ||
a90714c1 | 5468 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5469 | if (IS_ERR(handle)) { |
01225596 TM |
5470 | ret = -ENOMEM; |
5471 | mlog_errno(ret); | |
5472 | goto out; | |
5473 | } | |
5474 | ||
0cf2f763 | 5475 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5476 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5477 | if (ret) { |
5478 | mlog_errno(ret); | |
5479 | goto out_commit; | |
5480 | } | |
5481 | ||
dbdcf6a4 | 5482 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5483 | &dealloc); |
01225596 TM |
5484 | if (ret) { |
5485 | mlog_errno(ret); | |
5486 | goto out_commit; | |
5487 | } | |
5488 | ||
5489 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
ec20cec7 | 5490 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5491 | |
5492 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5493 | if (ret) | |
5494 | mlog_errno(ret); | |
6fdb702d | 5495 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
01225596 TM |
5496 | |
5497 | out_commit: | |
5498 | ocfs2_commit_trans(osb, handle); | |
5499 | out: | |
5500 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5501 | ||
5955102c | 5502 | inode_unlock(tl_inode); |
01225596 TM |
5503 | |
5504 | if (meta_ac) | |
5505 | ocfs2_free_alloc_context(meta_ac); | |
5506 | ||
5507 | ocfs2_run_deallocs(osb, &dealloc); | |
5508 | ||
5509 | return ret; | |
5510 | } | |
5511 | ||
80bcaf34 TM |
5512 | /* |
5513 | * check whether the xattr bucket is filled up with the same hash value. | |
5514 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5515 | * If we want to insert a xattr with different hash value, go ahead | |
5516 | * and ocfs2_divide_xattr_bucket will handle this. | |
5517 | */ | |
01225596 | 5518 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5519 | struct ocfs2_xattr_bucket *bucket, |
5520 | const char *name) | |
01225596 | 5521 | { |
3e632946 | 5522 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5523 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5524 | ||
5525 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5526 | return 0; | |
01225596 TM |
5527 | |
5528 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5529 | xh->xh_entries[0].xe_name_hash) { | |
5530 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5531 | "hash = %u\n", | |
9c7759aa | 5532 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5533 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5534 | return -ENOSPC; | |
5535 | } | |
5536 | ||
5537 | return 0; | |
5538 | } | |
5539 | ||
c5d95df5 JB |
5540 | /* |
5541 | * Try to set the entry in the current bucket. If we fail, the caller | |
5542 | * will handle getting us another bucket. | |
5543 | */ | |
5544 | static int ocfs2_xattr_set_entry_bucket(struct inode *inode, | |
5545 | struct ocfs2_xattr_info *xi, | |
5546 | struct ocfs2_xattr_search *xs, | |
5547 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5548 | { |
c5d95df5 JB |
5549 | int ret; |
5550 | struct ocfs2_xa_loc loc; | |
01225596 | 5551 | |
402b4183 | 5552 | trace_ocfs2_xattr_set_entry_bucket(xi->xi_name); |
01225596 | 5553 | |
c5d95df5 JB |
5554 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
5555 | xs->not_found ? NULL : xs->here); | |
5556 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
5557 | if (!ret) { | |
5558 | xs->here = loc.xl_entry; | |
5559 | goto out; | |
5560 | } | |
5561 | if (ret != -ENOSPC) { | |
5562 | mlog_errno(ret); | |
5563 | goto out; | |
5564 | } | |
01225596 | 5565 | |
c5d95df5 JB |
5566 | /* Ok, we need space. Let's try defragmenting the bucket. */ |
5567 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, | |
5568 | xs->bucket); | |
5569 | if (ret) { | |
5570 | mlog_errno(ret); | |
5571 | goto out; | |
5572 | } | |
01225596 | 5573 | |
c5d95df5 JB |
5574 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
5575 | if (!ret) { | |
5576 | xs->here = loc.xl_entry; | |
5577 | goto out; | |
01225596 | 5578 | } |
c5d95df5 JB |
5579 | if (ret != -ENOSPC) |
5580 | mlog_errno(ret); | |
01225596 | 5581 | |
01225596 | 5582 | |
c5d95df5 | 5583 | out: |
c5d95df5 JB |
5584 | return ret; |
5585 | } | |
01225596 | 5586 | |
c5d95df5 JB |
5587 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
5588 | struct ocfs2_xattr_info *xi, | |
5589 | struct ocfs2_xattr_search *xs, | |
5590 | struct ocfs2_xattr_set_ctxt *ctxt) | |
5591 | { | |
5592 | int ret; | |
01225596 | 5593 | |
402b4183 | 5594 | trace_ocfs2_xattr_set_entry_index_block(xi->xi_name); |
01225596 | 5595 | |
c5d95df5 JB |
5596 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
5597 | if (!ret) | |
5598 | goto out; | |
5599 | if (ret != -ENOSPC) { | |
5600 | mlog_errno(ret); | |
5601 | goto out; | |
5602 | } | |
01225596 | 5603 | |
c5d95df5 | 5604 | /* Ack, need more space. Let's try to get another bucket! */ |
01225596 | 5605 | |
c5d95df5 JB |
5606 | /* |
5607 | * We do not allow for overlapping ranges between buckets. And | |
5608 | * the maximum number of collisions we will allow for then is | |
5609 | * one bucket's worth, so check it here whether we need to | |
5610 | * add a new bucket for the insert. | |
5611 | */ | |
5612 | ret = ocfs2_check_xattr_bucket_collision(inode, | |
91f2033f | 5613 | xs->bucket, |
c5d95df5 JB |
5614 | xi->xi_name); |
5615 | if (ret) { | |
5616 | mlog_errno(ret); | |
5617 | goto out; | |
5618 | } | |
01225596 | 5619 | |
c5d95df5 JB |
5620 | ret = ocfs2_add_new_xattr_bucket(inode, |
5621 | xs->xattr_bh, | |
5622 | xs->bucket, | |
5623 | ctxt); | |
5624 | if (ret) { | |
5625 | mlog_errno(ret); | |
5626 | goto out; | |
01225596 TM |
5627 | } |
5628 | ||
c5d95df5 JB |
5629 | /* |
5630 | * ocfs2_add_new_xattr_bucket() will have updated | |
5631 | * xs->bucket if it moved, but it will not have updated | |
5632 | * any of the other search fields. Thus, we drop it and | |
5633 | * re-search. Everything should be cached, so it'll be | |
5634 | * quick. | |
5635 | */ | |
5636 | ocfs2_xattr_bucket_relse(xs->bucket); | |
5637 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
5638 | xi->xi_name_index, | |
5639 | xi->xi_name, xs); | |
5640 | if (ret && ret != -ENODATA) | |
5641 | goto out; | |
5642 | xs->not_found = ret; | |
5643 | ||
5644 | /* Ok, we have a new bucket, let's try again */ | |
5645 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); | |
5646 | if (ret && (ret != -ENOSPC)) | |
5647 | mlog_errno(ret); | |
5648 | ||
01225596 | 5649 | out: |
01225596 TM |
5650 | return ret; |
5651 | } | |
a3944256 TM |
5652 | |
5653 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5654 | struct ocfs2_xattr_bucket *bucket, | |
5655 | void *para) | |
5656 | { | |
ce9c5a54 | 5657 | int ret = 0, ref_credits; |
3e632946 | 5658 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5659 | u16 i; |
5660 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5661 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5662 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5663 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5664 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5665 | struct ocfs2_xattr_value_root *xv; |
5666 | struct ocfs2_rm_xattr_bucket_para *args = | |
5667 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5668 | |
5669 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5670 | |
5671 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5672 | xe = &xh->xh_entries[i]; | |
5673 | if (ocfs2_xattr_is_local(xe)) | |
5674 | continue; | |
5675 | ||
ce9c5a54 TM |
5676 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5677 | i, &xv, NULL); | |
023d4ea3 JQ |
5678 | if (ret) { |
5679 | mlog_errno(ret); | |
5680 | break; | |
5681 | } | |
ce9c5a54 TM |
5682 | |
5683 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5684 | args->ref_ci, | |
5685 | args->ref_root_bh, | |
5686 | &ctxt.meta_ac, | |
5687 | &ref_credits); | |
5688 | ||
5689 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5690 | if (IS_ERR(ctxt.handle)) { |
5691 | ret = PTR_ERR(ctxt.handle); | |
5692 | mlog_errno(ret); | |
5693 | break; | |
5694 | } | |
5695 | ||
548b0f22 | 5696 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5697 | i, 0, &ctxt); |
88c3b062 TM |
5698 | |
5699 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5700 | if (ctxt.meta_ac) { |
5701 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5702 | ctxt.meta_ac = NULL; | |
5703 | } | |
a3944256 TM |
5704 | if (ret) { |
5705 | mlog_errno(ret); | |
5706 | break; | |
5707 | } | |
5708 | } | |
5709 | ||
ce9c5a54 TM |
5710 | if (ctxt.meta_ac) |
5711 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5712 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5713 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5714 | return ret; |
5715 | } | |
5716 | ||
492a8a33 TM |
5717 | /* |
5718 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5719 | * or change the extent record flag), we need to recalculate | |
5720 | * the metaecc for the whole bucket. So it is done here. | |
5721 | * | |
5722 | * Note: | |
5723 | * We have to give the extra credits for the caller. | |
5724 | */ | |
5725 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5726 | handle_t *handle, | |
5727 | void *para) | |
5728 | { | |
5729 | int ret; | |
5730 | struct ocfs2_xattr_bucket *bucket = | |
5731 | (struct ocfs2_xattr_bucket *)para; | |
5732 | ||
5733 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5734 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5735 | if (ret) { | |
5736 | mlog_errno(ret); | |
5737 | return ret; | |
5738 | } | |
5739 | ||
5740 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5741 | ||
5742 | return 0; | |
5743 | } | |
5744 | ||
5745 | /* | |
5746 | * Special action we need if the xattr value is refcounted. | |
5747 | * | |
5748 | * 1. If the xattr is refcounted, lock the tree. | |
5749 | * 2. CoW the xattr if we are setting the new value and the value | |
5750 | * will be stored outside. | |
5751 | * 3. In other case, decrease_refcount will work for us, so just | |
5752 | * lock the refcount tree, calculate the meta and credits is OK. | |
5753 | * | |
5754 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5755 | * currently CoW is a completed transaction, while this function | |
5756 | * will also lock the allocators and let us deadlock. So we will | |
5757 | * CoW the whole xattr value. | |
5758 | */ | |
5759 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5760 | struct ocfs2_dinode *di, | |
5761 | struct ocfs2_xattr_info *xi, | |
5762 | struct ocfs2_xattr_search *xis, | |
5763 | struct ocfs2_xattr_search *xbs, | |
5764 | struct ocfs2_refcount_tree **ref_tree, | |
5765 | int *meta_add, | |
5766 | int *credits) | |
5767 | { | |
5768 | int ret = 0; | |
5769 | struct ocfs2_xattr_block *xb; | |
5770 | struct ocfs2_xattr_entry *xe; | |
5771 | char *base; | |
5772 | u32 p_cluster, num_clusters; | |
5773 | unsigned int ext_flags; | |
5774 | int name_offset, name_len; | |
5775 | struct ocfs2_xattr_value_buf vb; | |
5776 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5777 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5778 | struct ocfs2_post_refcount refcount; | |
5779 | struct ocfs2_post_refcount *p = NULL; | |
5780 | struct buffer_head *ref_root_bh = NULL; | |
5781 | ||
5782 | if (!xis->not_found) { | |
5783 | xe = xis->here; | |
5784 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5785 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5786 | base = xis->base; | |
5787 | vb.vb_bh = xis->inode_bh; | |
5788 | vb.vb_access = ocfs2_journal_access_di; | |
5789 | } else { | |
5790 | int i, block_off = 0; | |
5791 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5792 | xe = xbs->here; | |
5793 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5794 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5795 | i = xbs->here - xbs->header->xh_entries; | |
5796 | ||
5797 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5798 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5799 | bucket_xh(xbs->bucket), |
5800 | i, &block_off, | |
5801 | &name_offset); | |
5802 | if (ret) { | |
5803 | mlog_errno(ret); | |
5804 | goto out; | |
5805 | } | |
5806 | base = bucket_block(xbs->bucket, block_off); | |
5807 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5808 | vb.vb_access = ocfs2_journal_access; | |
5809 | ||
5810 | if (ocfs2_meta_ecc(osb)) { | |
5811 | /*create parameters for ocfs2_post_refcount. */ | |
5812 | bucket = xbs->bucket; | |
5813 | refcount.credits = bucket->bu_blocks; | |
5814 | refcount.para = bucket; | |
5815 | refcount.func = | |
5816 | ocfs2_xattr_bucket_post_refcount; | |
5817 | p = &refcount; | |
5818 | } | |
5819 | } else { | |
5820 | base = xbs->base; | |
5821 | vb.vb_bh = xbs->xattr_bh; | |
5822 | vb.vb_access = ocfs2_journal_access_xb; | |
5823 | } | |
5824 | } | |
5825 | ||
5826 | if (ocfs2_xattr_is_local(xe)) | |
5827 | goto out; | |
5828 | ||
5829 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5830 | (base + name_offset + name_len); | |
5831 | ||
5832 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5833 | &num_clusters, &vb.vb_xv->xr_list, | |
5834 | &ext_flags); | |
5835 | if (ret) { | |
5836 | mlog_errno(ret); | |
5837 | goto out; | |
5838 | } | |
5839 | ||
5840 | /* | |
5841 | * We just need to check the 1st extent record, since we always | |
5842 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5843 | * some REFCOUNT extent recs after the 1st one. | |
5844 | */ | |
5845 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5846 | goto out; | |
5847 | ||
5848 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5849 | 1, ref_tree, &ref_root_bh); | |
5850 | if (ret) { | |
5851 | mlog_errno(ret); | |
5852 | goto out; | |
5853 | } | |
5854 | ||
5855 | /* | |
5856 | * If we are deleting the xattr or the new size will be stored inside, | |
5857 | * cool, leave it there, the xattr truncate process will remove them | |
5858 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5859 | * And the worse case is that every cluster truncate will split the | |
5860 | * refcount tree, and make the original extent become 3. So we will need | |
5861 | * 2 * cluster more extent recs at most. | |
5862 | */ | |
6b240ff6 | 5863 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
492a8a33 TM |
5864 | |
5865 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5866 | &(*ref_tree)->rf_ci, | |
5867 | ref_root_bh, vb.vb_xv, | |
5868 | meta_add, credits); | |
5869 | if (ret) | |
5870 | mlog_errno(ret); | |
5871 | goto out; | |
5872 | } | |
5873 | ||
5874 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5875 | *ref_tree, ref_root_bh, 0, | |
5876 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5877 | if (ret) | |
5878 | mlog_errno(ret); | |
5879 | ||
5880 | out: | |
5881 | brelse(ref_root_bh); | |
5882 | return ret; | |
5883 | } | |
5884 | ||
0129241e TM |
5885 | /* |
5886 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5887 | * The physical clusters will be added to refcount tree. | |
5888 | */ | |
5889 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5890 | struct ocfs2_xattr_value_root *xv, | |
5891 | struct ocfs2_extent_tree *value_et, | |
5892 | struct ocfs2_caching_info *ref_ci, | |
5893 | struct buffer_head *ref_root_bh, | |
5894 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5895 | struct ocfs2_post_refcount *refcount) | |
5896 | { | |
5897 | int ret = 0; | |
5898 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5899 | u32 cpos, p_cluster, num_clusters; | |
5900 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5901 | unsigned int ext_flags; | |
5902 | ||
5903 | cpos = 0; | |
5904 | while (cpos < clusters) { | |
5905 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5906 | &num_clusters, el, &ext_flags); | |
17caf955 JQ |
5907 | if (ret) { |
5908 | mlog_errno(ret); | |
5909 | break; | |
5910 | } | |
0129241e TM |
5911 | |
5912 | cpos += num_clusters; | |
5913 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5914 | continue; | |
5915 | ||
5916 | BUG_ON(!p_cluster); | |
5917 | ||
5918 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5919 | ref_ci, ref_root_bh, | |
5920 | cpos - num_clusters, | |
5921 | p_cluster, num_clusters, | |
5922 | dealloc, refcount); | |
5923 | if (ret) { | |
5924 | mlog_errno(ret); | |
5925 | break; | |
5926 | } | |
5927 | } | |
5928 | ||
5929 | return ret; | |
5930 | } | |
5931 | ||
5932 | /* | |
5933 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5934 | * have value stored outside. | |
5935 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5936 | */ | |
5937 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5938 | struct ocfs2_xattr_value_buf *vb, | |
5939 | struct ocfs2_xattr_header *header, | |
5940 | struct ocfs2_caching_info *ref_ci, | |
5941 | struct buffer_head *ref_root_bh, | |
5942 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5943 | { | |
5944 | ||
5945 | struct ocfs2_xattr_entry *xe; | |
5946 | struct ocfs2_xattr_value_root *xv; | |
5947 | struct ocfs2_extent_tree et; | |
5948 | int i, ret = 0; | |
5949 | ||
5950 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5951 | xe = &header->xh_entries[i]; | |
5952 | ||
5953 | if (ocfs2_xattr_is_local(xe)) | |
5954 | continue; | |
5955 | ||
5956 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5957 | le16_to_cpu(xe->xe_name_offset) + | |
5958 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5959 | ||
5960 | vb->vb_xv = xv; | |
5961 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5962 | ||
5963 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5964 | ref_ci, ref_root_bh, | |
5965 | dealloc, NULL); | |
5966 | if (ret) { | |
5967 | mlog_errno(ret); | |
5968 | break; | |
5969 | } | |
5970 | } | |
5971 | ||
5972 | return ret; | |
5973 | } | |
5974 | ||
5975 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5976 | struct buffer_head *fe_bh, | |
5977 | struct ocfs2_caching_info *ref_ci, | |
5978 | struct buffer_head *ref_root_bh, | |
5979 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5980 | { | |
5981 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5982 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5983 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5984 | le16_to_cpu(di->i_xattr_inline_size)); | |
5985 | struct ocfs2_xattr_value_buf vb = { | |
5986 | .vb_bh = fe_bh, | |
5987 | .vb_access = ocfs2_journal_access_di, | |
5988 | }; | |
5989 | ||
5990 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5991 | ref_ci, ref_root_bh, dealloc); | |
5992 | } | |
5993 | ||
5994 | struct ocfs2_xattr_tree_value_refcount_para { | |
5995 | struct ocfs2_caching_info *ref_ci; | |
5996 | struct buffer_head *ref_root_bh; | |
5997 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
5998 | }; | |
5999 | ||
6000 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
6001 | struct ocfs2_xattr_bucket *bucket, | |
6002 | int offset, | |
6003 | struct ocfs2_xattr_value_root **xv, | |
6004 | struct buffer_head **bh) | |
6005 | { | |
6006 | int ret, block_off, name_offset; | |
6007 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
6008 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6009 | void *base; | |
6010 | ||
6011 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
6012 | bucket_xh(bucket), | |
6013 | offset, | |
6014 | &block_off, | |
6015 | &name_offset); | |
6016 | if (ret) { | |
6017 | mlog_errno(ret); | |
6018 | goto out; | |
6019 | } | |
6020 | ||
6021 | base = bucket_block(bucket, block_off); | |
6022 | ||
6023 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
6024 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6025 | ||
6026 | if (bh) | |
6027 | *bh = bucket->bu_bhs[block_off]; | |
6028 | out: | |
6029 | return ret; | |
6030 | } | |
6031 | ||
6032 | /* | |
6033 | * For a given xattr bucket, refcount all the entries which | |
6034 | * have value stored outside. | |
6035 | */ | |
6036 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
6037 | struct ocfs2_xattr_bucket *bucket, | |
6038 | void *para) | |
6039 | { | |
6040 | int i, ret = 0; | |
6041 | struct ocfs2_extent_tree et; | |
6042 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
6043 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
6044 | struct ocfs2_xattr_header *xh = | |
6045 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6046 | struct ocfs2_xattr_entry *xe; | |
6047 | struct ocfs2_xattr_value_buf vb = { | |
6048 | .vb_access = ocfs2_journal_access, | |
6049 | }; | |
6050 | struct ocfs2_post_refcount refcount = { | |
6051 | .credits = bucket->bu_blocks, | |
6052 | .para = bucket, | |
6053 | .func = ocfs2_xattr_bucket_post_refcount, | |
6054 | }; | |
6055 | struct ocfs2_post_refcount *p = NULL; | |
6056 | ||
6057 | /* We only need post_refcount if we support metaecc. */ | |
6058 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
6059 | p = &refcount; | |
6060 | ||
402b4183 TM |
6061 | trace_ocfs2_xattr_bucket_value_refcount( |
6062 | (unsigned long long)bucket_blkno(bucket), | |
6063 | le16_to_cpu(xh->xh_count)); | |
0129241e TM |
6064 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
6065 | xe = &xh->xh_entries[i]; | |
6066 | ||
6067 | if (ocfs2_xattr_is_local(xe)) | |
6068 | continue; | |
6069 | ||
6070 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
6071 | &vb.vb_xv, &vb.vb_bh); | |
6072 | if (ret) { | |
6073 | mlog_errno(ret); | |
6074 | break; | |
6075 | } | |
6076 | ||
6077 | ocfs2_init_xattr_value_extent_tree(&et, | |
6078 | INODE_CACHE(inode), &vb); | |
6079 | ||
6080 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
6081 | &et, ref->ref_ci, | |
6082 | ref->ref_root_bh, | |
6083 | ref->dealloc, p); | |
6084 | if (ret) { | |
6085 | mlog_errno(ret); | |
6086 | break; | |
6087 | } | |
6088 | } | |
6089 | ||
6090 | return ret; | |
6091 | ||
6092 | } | |
6093 | ||
6094 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
6095 | struct buffer_head *root_bh, | |
6096 | u64 blkno, u32 cpos, u32 len, void *para) | |
6097 | { | |
6098 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
6099 | ocfs2_xattr_bucket_value_refcount, | |
6100 | para); | |
6101 | } | |
6102 | ||
6103 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
6104 | struct buffer_head *blk_bh, | |
6105 | struct ocfs2_caching_info *ref_ci, | |
6106 | struct buffer_head *ref_root_bh, | |
6107 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6108 | { | |
6109 | int ret = 0; | |
6110 | struct ocfs2_xattr_block *xb = | |
6111 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6112 | ||
6113 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
6114 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
6115 | struct ocfs2_xattr_value_buf vb = { | |
6116 | .vb_bh = blk_bh, | |
6117 | .vb_access = ocfs2_journal_access_xb, | |
6118 | }; | |
6119 | ||
6120 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6121 | ref_ci, ref_root_bh, | |
6122 | dealloc); | |
6123 | } else { | |
6124 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
6125 | .ref_ci = ref_ci, | |
6126 | .ref_root_bh = ref_root_bh, | |
6127 | .dealloc = dealloc, | |
6128 | }; | |
6129 | ||
6130 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
6131 | ocfs2_refcount_xattr_tree_rec, | |
6132 | ¶); | |
6133 | } | |
6134 | ||
6135 | return ret; | |
6136 | } | |
6137 | ||
6138 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
6139 | struct buffer_head *fe_bh, | |
6140 | struct ocfs2_caching_info *ref_ci, | |
6141 | struct buffer_head *ref_root_bh, | |
6142 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6143 | { | |
6144 | int ret = 0; | |
6145 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
6146 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6147 | struct buffer_head *blk_bh = NULL; | |
6148 | ||
6149 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6150 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
6151 | ref_ci, ref_root_bh, | |
6152 | dealloc); | |
6153 | if (ret) { | |
6154 | mlog_errno(ret); | |
6155 | goto out; | |
6156 | } | |
6157 | } | |
6158 | ||
6159 | if (!di->i_xattr_loc) | |
6160 | goto out; | |
6161 | ||
6162 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
6163 | &blk_bh); | |
6164 | if (ret < 0) { | |
6165 | mlog_errno(ret); | |
6166 | goto out; | |
6167 | } | |
6168 | ||
6169 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
6170 | ref_root_bh, dealloc); | |
6171 | if (ret) | |
6172 | mlog_errno(ret); | |
6173 | ||
6174 | brelse(blk_bh); | |
6175 | out: | |
6176 | ||
6177 | return ret; | |
6178 | } | |
6179 | ||
0fe9b66c | 6180 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6181 | /* |
6182 | * Store the information we need in xattr reflink. | |
6183 | * old_bh and new_bh are inode bh for the old and new inode. | |
6184 | */ | |
6185 | struct ocfs2_xattr_reflink { | |
6186 | struct inode *old_inode; | |
6187 | struct inode *new_inode; | |
6188 | struct buffer_head *old_bh; | |
6189 | struct buffer_head *new_bh; | |
6190 | struct ocfs2_caching_info *ref_ci; | |
6191 | struct buffer_head *ref_root_bh; | |
6192 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6193 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6194 | }; |
6195 | ||
6196 | /* | |
6197 | * Given a xattr header and xe offset, | |
6198 | * return the proper xv and the corresponding bh. | |
6199 | * xattr in inode, block and xattr tree have different implementaions. | |
6200 | */ | |
6201 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6202 | struct buffer_head *bh, | |
6203 | struct ocfs2_xattr_header *xh, | |
6204 | int offset, | |
6205 | struct ocfs2_xattr_value_root **xv, | |
6206 | struct buffer_head **ret_bh, | |
6207 | void *para); | |
6208 | ||
6209 | /* | |
6210 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6211 | * credits we need if we create them from the scratch. | |
6212 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6213 | */ | |
6214 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6215 | struct buffer_head *bh, | |
6216 | struct ocfs2_xattr_header *xh, | |
6217 | int *metas, int *credits, | |
6218 | int *num_recs, | |
6219 | get_xattr_value_root *func, | |
6220 | void *para) | |
6221 | { | |
6222 | int i, ret = 0; | |
6223 | struct ocfs2_xattr_value_root *xv; | |
6224 | struct ocfs2_xattr_entry *xe; | |
6225 | ||
6226 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6227 | xe = &xh->xh_entries[i]; | |
6228 | if (ocfs2_xattr_is_local(xe)) | |
6229 | continue; | |
6230 | ||
6231 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6232 | if (ret) { | |
6233 | mlog_errno(ret); | |
6234 | break; | |
6235 | } | |
6236 | ||
6237 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6238 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6239 | ||
6240 | *credits += ocfs2_calc_extend_credits(sb, | |
06f9da6e | 6241 | &def_xv.xv.xr_list); |
2999d12f TM |
6242 | |
6243 | /* | |
6244 | * If the value is a tree with depth > 1, We don't go deep | |
6245 | * to the extent block, so just calculate a maximum record num. | |
6246 | */ | |
6247 | if (!xv->xr_list.l_tree_depth) | |
8ff6af88 | 6248 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
2999d12f TM |
6249 | else |
6250 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6251 | XATTR_SIZE_MAX); | |
6252 | } | |
6253 | ||
6254 | return ret; | |
6255 | } | |
6256 | ||
6257 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6258 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6259 | struct buffer_head *bh, | |
6260 | struct ocfs2_xattr_header *xh, | |
6261 | int offset, | |
6262 | struct ocfs2_xattr_value_root **xv, | |
6263 | struct buffer_head **ret_bh, | |
6264 | void *para) | |
6265 | { | |
6266 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6267 | ||
6268 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6269 | le16_to_cpu(xe->xe_name_offset) + | |
6270 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6271 | ||
6272 | if (ret_bh) | |
6273 | *ret_bh = bh; | |
6274 | ||
6275 | return 0; | |
6276 | } | |
6277 | ||
6278 | /* | |
6279 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6280 | * It is only used for inline xattr and xattr block. | |
6281 | */ | |
6282 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6283 | struct ocfs2_xattr_header *xh, | |
6284 | struct buffer_head *ref_root_bh, | |
6285 | int *credits, | |
6286 | struct ocfs2_alloc_context **meta_ac) | |
6287 | { | |
6288 | int ret, meta_add = 0, num_recs = 0; | |
6289 | struct ocfs2_refcount_block *rb = | |
6290 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6291 | ||
6292 | *credits = 0; | |
6293 | ||
6294 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6295 | &meta_add, credits, &num_recs, | |
6296 | ocfs2_get_xattr_value_root, | |
6297 | NULL); | |
6298 | if (ret) { | |
6299 | mlog_errno(ret); | |
6300 | goto out; | |
6301 | } | |
6302 | ||
6303 | /* | |
6304 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6305 | * an approximate number we need for refcount tree change. | |
6306 | * Sometimes we need to split the tree, and after split, half recs | |
6307 | * will be moved to the new block, and a new block can only provide | |
6308 | * half number of recs. So we multiple new blocks by 2. | |
6309 | */ | |
6310 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6311 | meta_add += num_recs; | |
6312 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6313 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6314 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6315 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6316 | else | |
6317 | *credits += 1; | |
6318 | ||
6319 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6320 | if (ret) | |
6321 | mlog_errno(ret); | |
6322 | ||
6323 | out: | |
6324 | return ret; | |
6325 | } | |
6326 | ||
6327 | /* | |
6328 | * Given a xattr header, reflink all the xattrs in this container. | |
6329 | * It can be used for inode, block and bucket. | |
6330 | * | |
6331 | * NOTE: | |
6332 | * Before we call this function, the caller has memcpy the xattr in | |
6333 | * old_xh to the new_xh. | |
0fe9b66c TM |
6334 | * |
6335 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6336 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6337 | */ |
6338 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6339 | struct ocfs2_xattr_reflink *args, | |
6340 | struct buffer_head *old_bh, | |
6341 | struct ocfs2_xattr_header *xh, | |
6342 | struct buffer_head *new_bh, | |
6343 | struct ocfs2_xattr_header *new_xh, | |
6344 | struct ocfs2_xattr_value_buf *vb, | |
6345 | struct ocfs2_alloc_context *meta_ac, | |
6346 | get_xattr_value_root *func, | |
6347 | void *para) | |
6348 | { | |
0fe9b66c | 6349 | int ret = 0, i, j; |
2999d12f TM |
6350 | struct super_block *sb = args->old_inode->i_sb; |
6351 | struct buffer_head *value_bh; | |
0fe9b66c | 6352 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6353 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6354 | struct ocfs2_extent_tree data_et; | |
6355 | u32 clusters, cpos, p_cluster, num_clusters; | |
6356 | unsigned int ext_flags = 0; | |
6357 | ||
402b4183 TM |
6358 | trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr, |
6359 | le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6360 | |
6361 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6362 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6363 | xe = &xh->xh_entries[i]; |
6364 | ||
0fe9b66c TM |
6365 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6366 | xe = &new_xh->xh_entries[j]; | |
6367 | ||
6368 | le16_add_cpu(&new_xh->xh_count, -1); | |
6369 | if (new_xh->xh_count) { | |
6370 | memmove(xe, xe + 1, | |
6371 | (void *)last - (void *)xe); | |
6372 | memset(last, 0, | |
6373 | sizeof(struct ocfs2_xattr_entry)); | |
6374 | } | |
6375 | ||
6376 | /* | |
6377 | * We don't want j to increase in the next round since | |
6378 | * it is already moved ahead. | |
6379 | */ | |
6380 | j--; | |
6381 | continue; | |
6382 | } | |
6383 | ||
2999d12f TM |
6384 | if (ocfs2_xattr_is_local(xe)) |
6385 | continue; | |
6386 | ||
6387 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6388 | if (ret) { | |
6389 | mlog_errno(ret); | |
6390 | break; | |
6391 | } | |
6392 | ||
0fe9b66c | 6393 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6394 | if (ret) { |
6395 | mlog_errno(ret); | |
6396 | break; | |
6397 | } | |
6398 | ||
6399 | /* | |
6400 | * For the xattr which has l_tree_depth = 0, all the extent | |
6401 | * recs have already be copied to the new xh with the | |
6402 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6403 | * increase the refount count int the refcount tree. | |
6404 | * | |
6405 | * For the xattr which has l_tree_depth > 0, we need | |
6406 | * to initialize it to the empty default value root, | |
6407 | * and then insert the extents one by one. | |
6408 | */ | |
6409 | if (xv->xr_list.l_tree_depth) { | |
32ed0bd7 | 6410 | memcpy(new_xv, &def_xv, OCFS2_XATTR_ROOT_SIZE); |
2999d12f TM |
6411 | vb->vb_xv = new_xv; |
6412 | vb->vb_bh = value_bh; | |
6413 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6414 | INODE_CACHE(args->new_inode), vb); | |
6415 | } | |
6416 | ||
6417 | clusters = le32_to_cpu(xv->xr_clusters); | |
6418 | cpos = 0; | |
6419 | while (cpos < clusters) { | |
6420 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6421 | cpos, | |
6422 | &p_cluster, | |
6423 | &num_clusters, | |
6424 | &xv->xr_list, | |
6425 | &ext_flags); | |
6426 | if (ret) { | |
6427 | mlog_errno(ret); | |
6428 | goto out; | |
6429 | } | |
6430 | ||
6431 | BUG_ON(!p_cluster); | |
6432 | ||
6433 | if (xv->xr_list.l_tree_depth) { | |
6434 | ret = ocfs2_insert_extent(handle, | |
6435 | &data_et, cpos, | |
6436 | ocfs2_clusters_to_blocks( | |
6437 | args->old_inode->i_sb, | |
6438 | p_cluster), | |
6439 | num_clusters, ext_flags, | |
6440 | meta_ac); | |
6441 | if (ret) { | |
6442 | mlog_errno(ret); | |
6443 | goto out; | |
6444 | } | |
6445 | } | |
6446 | ||
6447 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6448 | args->ref_root_bh, | |
6449 | p_cluster, num_clusters, | |
6450 | meta_ac, args->dealloc); | |
6451 | if (ret) { | |
6452 | mlog_errno(ret); | |
6453 | goto out; | |
6454 | } | |
6455 | ||
6456 | cpos += num_clusters; | |
6457 | } | |
6458 | } | |
6459 | ||
6460 | out: | |
6461 | return ret; | |
6462 | } | |
6463 | ||
6464 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6465 | { | |
6466 | int ret = 0, credits = 0; | |
6467 | handle_t *handle; | |
6468 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6469 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6470 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6471 | int header_off = osb->sb->s_blocksize - inline_size; | |
6472 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6473 | (args->old_bh->b_data + header_off); | |
6474 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6475 | (args->new_bh->b_data + header_off); | |
6476 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6477 | struct ocfs2_inode_info *new_oi; | |
6478 | struct ocfs2_dinode *new_di; | |
6479 | struct ocfs2_xattr_value_buf vb = { | |
6480 | .vb_bh = args->new_bh, | |
6481 | .vb_access = ocfs2_journal_access_di, | |
6482 | }; | |
6483 | ||
6484 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6485 | &credits, &meta_ac); | |
6486 | if (ret) { | |
6487 | mlog_errno(ret); | |
6488 | goto out; | |
6489 | } | |
6490 | ||
6491 | handle = ocfs2_start_trans(osb, credits); | |
6492 | if (IS_ERR(handle)) { | |
6493 | ret = PTR_ERR(handle); | |
6494 | mlog_errno(ret); | |
6495 | goto out; | |
6496 | } | |
6497 | ||
6498 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6499 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6500 | if (ret) { | |
6501 | mlog_errno(ret); | |
6502 | goto out_commit; | |
6503 | } | |
6504 | ||
6505 | memcpy(args->new_bh->b_data + header_off, | |
6506 | args->old_bh->b_data + header_off, inline_size); | |
6507 | ||
6508 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6509 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6510 | ||
6511 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6512 | args->new_bh, new_xh, &vb, meta_ac, | |
6513 | ocfs2_get_xattr_value_root, NULL); | |
6514 | if (ret) { | |
6515 | mlog_errno(ret); | |
6516 | goto out_commit; | |
6517 | } | |
6518 | ||
6519 | new_oi = OCFS2_I(args->new_inode); | |
ef962df0 JB |
6520 | /* |
6521 | * Adjust extent record count to reserve space for extended attribute. | |
6522 | * Inline data count had been adjusted in ocfs2_duplicate_inline_data(). | |
6523 | */ | |
6524 | if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) && | |
6525 | !(ocfs2_inode_is_fast_symlink(args->new_inode))) { | |
6526 | struct ocfs2_extent_list *el = &new_di->id2.i_list; | |
6527 | le16_add_cpu(&el->l_count, -(inline_size / | |
6528 | sizeof(struct ocfs2_extent_rec))); | |
6529 | } | |
2999d12f TM |
6530 | spin_lock(&new_oi->ip_lock); |
6531 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6532 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6533 | spin_unlock(&new_oi->ip_lock); | |
6534 | ||
6535 | ocfs2_journal_dirty(handle, args->new_bh); | |
6536 | ||
6537 | out_commit: | |
6538 | ocfs2_commit_trans(osb, handle); | |
6539 | ||
6540 | out: | |
6541 | if (meta_ac) | |
6542 | ocfs2_free_alloc_context(meta_ac); | |
6543 | return ret; | |
6544 | } | |
6545 | ||
6546 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6547 | struct buffer_head *fe_bh, | |
6548 | struct buffer_head **ret_bh, | |
6549 | int indexed) | |
6550 | { | |
6551 | int ret; | |
2999d12f | 6552 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
b2317968 | 6553 | struct ocfs2_xattr_set_ctxt ctxt; |
2999d12f | 6554 | |
b2317968 TM |
6555 | memset(&ctxt, 0, sizeof(ctxt)); |
6556 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac); | |
2999d12f TM |
6557 | if (ret < 0) { |
6558 | mlog_errno(ret); | |
6559 | return ret; | |
6560 | } | |
6561 | ||
d3981544 JB |
6562 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); |
6563 | if (IS_ERR(ctxt.handle)) { | |
6564 | ret = PTR_ERR(ctxt.handle); | |
2999d12f TM |
6565 | mlog_errno(ret); |
6566 | goto out; | |
6567 | } | |
6568 | ||
402b4183 TM |
6569 | trace_ocfs2_create_empty_xattr_block( |
6570 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
d3981544 JB |
6571 | ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed, |
6572 | ret_bh); | |
2999d12f TM |
6573 | if (ret) |
6574 | mlog_errno(ret); | |
6575 | ||
d3981544 | 6576 | ocfs2_commit_trans(osb, ctxt.handle); |
2999d12f | 6577 | out: |
b2317968 | 6578 | ocfs2_free_alloc_context(ctxt.meta_ac); |
2999d12f TM |
6579 | return ret; |
6580 | } | |
6581 | ||
6582 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6583 | struct buffer_head *blk_bh, | |
6584 | struct buffer_head *new_blk_bh) | |
6585 | { | |
6586 | int ret = 0, credits = 0; | |
6587 | handle_t *handle; | |
6588 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6589 | struct ocfs2_dinode *new_di; | |
6590 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6591 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6592 | struct ocfs2_xattr_block *xb = | |
6593 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6594 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6595 | struct ocfs2_xattr_block *new_xb = | |
6596 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6597 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6598 | struct ocfs2_alloc_context *meta_ac; | |
6599 | struct ocfs2_xattr_value_buf vb = { | |
6600 | .vb_bh = new_blk_bh, | |
6601 | .vb_access = ocfs2_journal_access_xb, | |
6602 | }; | |
6603 | ||
6604 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6605 | &credits, &meta_ac); | |
6606 | if (ret) { | |
6607 | mlog_errno(ret); | |
6608 | return ret; | |
6609 | } | |
6610 | ||
6611 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6612 | handle = ocfs2_start_trans(osb, credits + 1); | |
6613 | if (IS_ERR(handle)) { | |
6614 | ret = PTR_ERR(handle); | |
6615 | mlog_errno(ret); | |
6616 | goto out; | |
6617 | } | |
6618 | ||
6619 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6620 | ret = ocfs2_journal_access_di(handle, | |
6621 | INODE_CACHE(args->new_inode), | |
6622 | args->new_bh, | |
6623 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6624 | if (ret) { | |
6625 | mlog_errno(ret); | |
6626 | goto out_commit; | |
6627 | } | |
6628 | } | |
6629 | ||
6630 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6631 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6632 | if (ret) { | |
6633 | mlog_errno(ret); | |
6634 | goto out_commit; | |
6635 | } | |
6636 | ||
6637 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6638 | osb->sb->s_blocksize - header_off); | |
6639 | ||
6640 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6641 | new_blk_bh, new_xh, &vb, meta_ac, | |
6642 | ocfs2_get_xattr_value_root, NULL); | |
6643 | if (ret) { | |
6644 | mlog_errno(ret); | |
6645 | goto out_commit; | |
6646 | } | |
6647 | ||
6648 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6649 | ||
6650 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6651 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6652 | spin_lock(&new_oi->ip_lock); | |
6653 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6654 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6655 | spin_unlock(&new_oi->ip_lock); | |
6656 | ||
6657 | ocfs2_journal_dirty(handle, args->new_bh); | |
6658 | } | |
6659 | ||
6660 | out_commit: | |
6661 | ocfs2_commit_trans(osb, handle); | |
6662 | ||
6663 | out: | |
6664 | ocfs2_free_alloc_context(meta_ac); | |
6665 | return ret; | |
6666 | } | |
6667 | ||
6668 | struct ocfs2_reflink_xattr_tree_args { | |
6669 | struct ocfs2_xattr_reflink *reflink; | |
6670 | struct buffer_head *old_blk_bh; | |
6671 | struct buffer_head *new_blk_bh; | |
6672 | struct ocfs2_xattr_bucket *old_bucket; | |
6673 | struct ocfs2_xattr_bucket *new_bucket; | |
6674 | }; | |
6675 | ||
6676 | /* | |
6677 | * NOTE: | |
6678 | * We have to handle the case that both old bucket and new bucket | |
6679 | * will call this function to get the right ret_bh. | |
6680 | * So The caller must give us the right bh. | |
6681 | */ | |
6682 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6683 | struct buffer_head *bh, | |
6684 | struct ocfs2_xattr_header *xh, | |
6685 | int offset, | |
6686 | struct ocfs2_xattr_value_root **xv, | |
6687 | struct buffer_head **ret_bh, | |
6688 | void *para) | |
6689 | { | |
6690 | struct ocfs2_reflink_xattr_tree_args *args = | |
6691 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6692 | struct ocfs2_xattr_bucket *bucket; | |
6693 | ||
6694 | if (bh == args->old_bucket->bu_bhs[0]) | |
6695 | bucket = args->old_bucket; | |
6696 | else | |
6697 | bucket = args->new_bucket; | |
6698 | ||
6699 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6700 | xv, ret_bh); | |
6701 | } | |
6702 | ||
6703 | struct ocfs2_value_tree_metas { | |
6704 | int num_metas; | |
6705 | int credits; | |
6706 | int num_recs; | |
6707 | }; | |
6708 | ||
6709 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6710 | struct buffer_head *bh, | |
6711 | struct ocfs2_xattr_header *xh, | |
6712 | int offset, | |
6713 | struct ocfs2_xattr_value_root **xv, | |
6714 | struct buffer_head **ret_bh, | |
6715 | void *para) | |
6716 | { | |
6717 | struct ocfs2_xattr_bucket *bucket = | |
6718 | (struct ocfs2_xattr_bucket *)para; | |
6719 | ||
6720 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6721 | xv, ret_bh); | |
6722 | } | |
6723 | ||
6724 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6725 | struct ocfs2_xattr_bucket *bucket, | |
6726 | void *para) | |
6727 | { | |
6728 | struct ocfs2_value_tree_metas *metas = | |
6729 | (struct ocfs2_value_tree_metas *)para; | |
6730 | struct ocfs2_xattr_header *xh = | |
6731 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6732 | ||
6733 | /* Add the credits for this bucket first. */ | |
6734 | metas->credits += bucket->bu_blocks; | |
6735 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6736 | xh, &metas->num_metas, | |
6737 | &metas->credits, &metas->num_recs, | |
6738 | ocfs2_value_tree_metas_in_bucket, | |
6739 | bucket); | |
6740 | } | |
6741 | ||
6742 | /* | |
6743 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6744 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6745 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6746 | */ | |
6747 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6748 | struct ocfs2_reflink_xattr_tree_args *args, | |
6749 | struct ocfs2_extent_tree *xt_et, | |
6750 | u64 blkno, u32 len, int *credits, | |
6751 | struct ocfs2_alloc_context **meta_ac, | |
6752 | struct ocfs2_alloc_context **data_ac) | |
6753 | { | |
6754 | int ret, num_free_extents; | |
6755 | struct ocfs2_value_tree_metas metas; | |
6756 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6757 | struct ocfs2_refcount_block *rb; | |
6758 | ||
6759 | memset(&metas, 0, sizeof(metas)); | |
6760 | ||
6761 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6762 | ocfs2_calc_value_tree_metas, &metas); | |
6763 | if (ret) { | |
6764 | mlog_errno(ret); | |
6765 | goto out; | |
6766 | } | |
6767 | ||
6768 | *credits = metas.credits; | |
6769 | ||
6770 | /* | |
6771 | * Calculate we need for refcount tree change. | |
6772 | * | |
6773 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6774 | * an approximate number we need for refcount tree change. | |
6775 | * Sometimes we need to split the tree, and after split, half recs | |
6776 | * will be moved to the new block, and a new block can only provide | |
6777 | * half number of recs. So we multiple new blocks by 2. | |
6778 | * In the end, we have to add credits for modifying the already | |
6779 | * existed refcount block. | |
6780 | */ | |
6781 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6782 | metas.num_recs = | |
6783 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6784 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6785 | metas.num_metas += metas.num_recs; | |
6786 | *credits += metas.num_recs + | |
6787 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6788 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6789 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6790 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6791 | else | |
6792 | *credits += 1; | |
6793 | ||
6794 | /* count in the xattr tree change. */ | |
964f14a0 | 6795 | num_free_extents = ocfs2_num_free_extents(xt_et); |
2999d12f TM |
6796 | if (num_free_extents < 0) { |
6797 | ret = num_free_extents; | |
6798 | mlog_errno(ret); | |
6799 | goto out; | |
6800 | } | |
6801 | ||
6802 | if (num_free_extents < len) | |
6803 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6804 | ||
6805 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
06f9da6e | 6806 | xt_et->et_root_el); |
2999d12f TM |
6807 | |
6808 | if (metas.num_metas) { | |
6809 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6810 | meta_ac); | |
6811 | if (ret) { | |
6812 | mlog_errno(ret); | |
6813 | goto out; | |
6814 | } | |
6815 | } | |
6816 | ||
6817 | if (len) { | |
6818 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6819 | if (ret) | |
6820 | mlog_errno(ret); | |
6821 | } | |
6822 | out: | |
6823 | if (ret) { | |
6824 | if (*meta_ac) { | |
6825 | ocfs2_free_alloc_context(*meta_ac); | |
6cae6d31 | 6826 | *meta_ac = NULL; |
2999d12f TM |
6827 | } |
6828 | } | |
6829 | ||
6830 | return ret; | |
6831 | } | |
6832 | ||
121a39bb | 6833 | static int ocfs2_reflink_xattr_bucket(handle_t *handle, |
2999d12f | 6834 | u64 blkno, u64 new_blkno, u32 clusters, |
121a39bb | 6835 | u32 *cpos, int num_buckets, |
2999d12f TM |
6836 | struct ocfs2_alloc_context *meta_ac, |
6837 | struct ocfs2_alloc_context *data_ac, | |
6838 | struct ocfs2_reflink_xattr_tree_args *args) | |
6839 | { | |
6840 | int i, j, ret = 0; | |
6841 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
2999d12f TM |
6842 | int bpb = args->old_bucket->bu_blocks; |
6843 | struct ocfs2_xattr_value_buf vb = { | |
6844 | .vb_access = ocfs2_journal_access, | |
6845 | }; | |
6846 | ||
6847 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6848 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6849 | if (ret) { | |
6850 | mlog_errno(ret); | |
6851 | break; | |
6852 | } | |
6853 | ||
9c339255 | 6854 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno, 1); |
2999d12f TM |
6855 | if (ret) { |
6856 | mlog_errno(ret); | |
6857 | break; | |
6858 | } | |
6859 | ||
2999d12f TM |
6860 | ret = ocfs2_xattr_bucket_journal_access(handle, |
6861 | args->new_bucket, | |
6862 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6863 | if (ret) { | |
6864 | mlog_errno(ret); | |
6865 | break; | |
6866 | } | |
6867 | ||
6868 | for (j = 0; j < bpb; j++) | |
6869 | memcpy(bucket_block(args->new_bucket, j), | |
6870 | bucket_block(args->old_bucket, j), | |
6871 | sb->s_blocksize); | |
6872 | ||
121a39bb TM |
6873 | /* |
6874 | * Record the start cpos so that we can use it to initialize | |
6875 | * our xattr tree we also set the xh_num_bucket for the new | |
6876 | * bucket. | |
6877 | */ | |
6878 | if (i == 0) { | |
6879 | *cpos = le32_to_cpu(bucket_xh(args->new_bucket)-> | |
6880 | xh_entries[0].xe_name_hash); | |
6881 | bucket_xh(args->new_bucket)->xh_num_buckets = | |
6882 | cpu_to_le16(num_buckets); | |
6883 | } | |
6884 | ||
2999d12f TM |
6885 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); |
6886 | ||
6887 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6888 | args->old_bucket->bu_bhs[0], | |
6889 | bucket_xh(args->old_bucket), | |
6890 | args->new_bucket->bu_bhs[0], | |
6891 | bucket_xh(args->new_bucket), | |
6892 | &vb, meta_ac, | |
6893 | ocfs2_get_reflink_xattr_value_root, | |
6894 | args); | |
6895 | if (ret) { | |
6896 | mlog_errno(ret); | |
6897 | break; | |
6898 | } | |
6899 | ||
6900 | /* | |
6901 | * Re-access and dirty the bucket to calculate metaecc. | |
6902 | * Because we may extend the transaction in reflink_xattr_header | |
6903 | * which will let the already accessed block gone. | |
6904 | */ | |
6905 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6906 | args->new_bucket, | |
6907 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6908 | if (ret) { | |
6909 | mlog_errno(ret); | |
6910 | break; | |
6911 | } | |
6912 | ||
6913 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
121a39bb | 6914 | |
2999d12f TM |
6915 | ocfs2_xattr_bucket_relse(args->old_bucket); |
6916 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6917 | } | |
6918 | ||
6919 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6920 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6921 | return ret; | |
6922 | } | |
121a39bb TM |
6923 | |
6924 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6925 | struct inode *inode, | |
6926 | struct ocfs2_reflink_xattr_tree_args *args, | |
6927 | struct ocfs2_extent_tree *et, | |
6928 | struct ocfs2_alloc_context *meta_ac, | |
6929 | struct ocfs2_alloc_context *data_ac, | |
6930 | u64 blkno, u32 cpos, u32 len) | |
6931 | { | |
6932 | int ret, first_inserted = 0; | |
6933 | u32 p_cluster, num_clusters, reflink_cpos = 0; | |
6934 | u64 new_blkno; | |
6935 | unsigned int num_buckets, reflink_buckets; | |
6936 | unsigned int bpc = | |
6937 | ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); | |
6938 | ||
6939 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6940 | if (ret) { | |
6941 | mlog_errno(ret); | |
6942 | goto out; | |
6943 | } | |
6944 | num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets); | |
6945 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6946 | ||
6947 | while (len && num_buckets) { | |
6948 | ret = ocfs2_claim_clusters(handle, data_ac, | |
6949 | 1, &p_cluster, &num_clusters); | |
6950 | if (ret) { | |
6951 | mlog_errno(ret); | |
6952 | goto out; | |
6953 | } | |
6954 | ||
6955 | new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
6956 | reflink_buckets = min(num_buckets, bpc * num_clusters); | |
6957 | ||
6958 | ret = ocfs2_reflink_xattr_bucket(handle, blkno, | |
6959 | new_blkno, num_clusters, | |
6960 | &reflink_cpos, reflink_buckets, | |
6961 | meta_ac, data_ac, args); | |
6962 | if (ret) { | |
6963 | mlog_errno(ret); | |
6964 | goto out; | |
6965 | } | |
6966 | ||
6967 | /* | |
6968 | * For the 1st allocated cluster, we make it use the same cpos | |
6969 | * so that the xattr tree looks the same as the original one | |
6970 | * in the most case. | |
6971 | */ | |
6972 | if (!first_inserted) { | |
6973 | reflink_cpos = cpos; | |
6974 | first_inserted = 1; | |
6975 | } | |
6976 | ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno, | |
6977 | num_clusters, 0, meta_ac); | |
6978 | if (ret) | |
6979 | mlog_errno(ret); | |
6980 | ||
402b4183 TM |
6981 | trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno, |
6982 | num_clusters, reflink_cpos); | |
121a39bb TM |
6983 | |
6984 | len -= num_clusters; | |
6985 | blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters); | |
6986 | num_buckets -= reflink_buckets; | |
6987 | } | |
6988 | out: | |
6989 | return ret; | |
6990 | } | |
6991 | ||
2999d12f TM |
6992 | /* |
6993 | * Create the same xattr extent record in the new inode's xattr tree. | |
6994 | */ | |
6995 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6996 | struct buffer_head *root_bh, | |
6997 | u64 blkno, | |
6998 | u32 cpos, | |
6999 | u32 len, | |
7000 | void *para) | |
7001 | { | |
7002 | int ret, credits = 0; | |
2999d12f TM |
7003 | handle_t *handle; |
7004 | struct ocfs2_reflink_xattr_tree_args *args = | |
7005 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
7006 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7007 | struct ocfs2_alloc_context *meta_ac = NULL; | |
7008 | struct ocfs2_alloc_context *data_ac = NULL; | |
7009 | struct ocfs2_extent_tree et; | |
7010 | ||
402b4183 | 7011 | trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len); |
121a39bb | 7012 | |
2999d12f TM |
7013 | ocfs2_init_xattr_tree_extent_tree(&et, |
7014 | INODE_CACHE(args->reflink->new_inode), | |
7015 | args->new_blk_bh); | |
7016 | ||
7017 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
7018 | len, &credits, | |
7019 | &meta_ac, &data_ac); | |
7020 | if (ret) { | |
7021 | mlog_errno(ret); | |
7022 | goto out; | |
7023 | } | |
7024 | ||
7025 | handle = ocfs2_start_trans(osb, credits); | |
7026 | if (IS_ERR(handle)) { | |
7027 | ret = PTR_ERR(handle); | |
7028 | mlog_errno(ret); | |
7029 | goto out; | |
7030 | } | |
7031 | ||
121a39bb TM |
7032 | ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et, |
7033 | meta_ac, data_ac, | |
7034 | blkno, cpos, len); | |
2999d12f TM |
7035 | if (ret) |
7036 | mlog_errno(ret); | |
7037 | ||
2999d12f TM |
7038 | ocfs2_commit_trans(osb, handle); |
7039 | ||
7040 | out: | |
7041 | if (meta_ac) | |
7042 | ocfs2_free_alloc_context(meta_ac); | |
7043 | if (data_ac) | |
7044 | ocfs2_free_alloc_context(data_ac); | |
7045 | return ret; | |
7046 | } | |
7047 | ||
7048 | /* | |
7049 | * Create reflinked xattr buckets. | |
7050 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
7051 | * if they are stored outside. | |
7052 | */ | |
7053 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
7054 | struct buffer_head *blk_bh, | |
7055 | struct buffer_head *new_blk_bh) | |
7056 | { | |
7057 | int ret; | |
7058 | struct ocfs2_reflink_xattr_tree_args para; | |
7059 | ||
7060 | memset(¶, 0, sizeof(para)); | |
7061 | para.reflink = args; | |
7062 | para.old_blk_bh = blk_bh; | |
7063 | para.new_blk_bh = new_blk_bh; | |
7064 | ||
7065 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
7066 | if (!para.old_bucket) { | |
7067 | mlog_errno(-ENOMEM); | |
7068 | return -ENOMEM; | |
7069 | } | |
7070 | ||
7071 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
7072 | if (!para.new_bucket) { | |
7073 | ret = -ENOMEM; | |
7074 | mlog_errno(ret); | |
7075 | goto out; | |
7076 | } | |
7077 | ||
7078 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
7079 | ocfs2_reflink_xattr_rec, | |
7080 | ¶); | |
7081 | if (ret) | |
7082 | mlog_errno(ret); | |
7083 | ||
7084 | out: | |
7085 | ocfs2_xattr_bucket_free(para.old_bucket); | |
7086 | ocfs2_xattr_bucket_free(para.new_bucket); | |
7087 | return ret; | |
7088 | } | |
7089 | ||
7090 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
7091 | struct buffer_head *blk_bh) | |
7092 | { | |
7093 | int ret, indexed = 0; | |
7094 | struct buffer_head *new_blk_bh = NULL; | |
7095 | struct ocfs2_xattr_block *xb = | |
7096 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
7097 | ||
7098 | ||
7099 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
7100 | indexed = 1; | |
7101 | ||
7102 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
7103 | &new_blk_bh, indexed); | |
7104 | if (ret) { | |
7105 | mlog_errno(ret); | |
7106 | goto out; | |
7107 | } | |
7108 | ||
2decd65a | 7109 | if (!indexed) |
2999d12f TM |
7110 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); |
7111 | else | |
7112 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
7113 | if (ret) | |
7114 | mlog_errno(ret); | |
7115 | ||
7116 | out: | |
7117 | brelse(new_blk_bh); | |
7118 | return ret; | |
7119 | } | |
7120 | ||
0fe9b66c TM |
7121 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
7122 | { | |
7123 | int type = ocfs2_xattr_get_type(xe); | |
7124 | ||
7125 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
7126 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
7127 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
7128 | } | |
7129 | ||
2999d12f TM |
7130 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
7131 | struct buffer_head *old_bh, | |
7132 | struct inode *new_inode, | |
0fe9b66c TM |
7133 | struct buffer_head *new_bh, |
7134 | bool preserve_security) | |
2999d12f TM |
7135 | { |
7136 | int ret; | |
7137 | struct ocfs2_xattr_reflink args; | |
7138 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
7139 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
7140 | struct buffer_head *blk_bh = NULL; | |
7141 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
7142 | struct ocfs2_refcount_tree *ref_tree; | |
7143 | struct buffer_head *ref_root_bh = NULL; | |
7144 | ||
7145 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7146 | le64_to_cpu(di->i_refcount_loc), | |
7147 | 1, &ref_tree, &ref_root_bh); | |
7148 | if (ret) { | |
7149 | mlog_errno(ret); | |
7150 | goto out; | |
7151 | } | |
7152 | ||
7153 | ocfs2_init_dealloc_ctxt(&dealloc); | |
7154 | ||
7155 | args.old_inode = old_inode; | |
7156 | args.new_inode = new_inode; | |
7157 | args.old_bh = old_bh; | |
7158 | args.new_bh = new_bh; | |
7159 | args.ref_ci = &ref_tree->rf_ci; | |
7160 | args.ref_root_bh = ref_root_bh; | |
7161 | args.dealloc = &dealloc; | |
0fe9b66c TM |
7162 | if (preserve_security) |
7163 | args.xattr_reflinked = NULL; | |
7164 | else | |
7165 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
7166 | |
7167 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
7168 | ret = ocfs2_reflink_xattr_inline(&args); | |
7169 | if (ret) { | |
7170 | mlog_errno(ret); | |
7171 | goto out_unlock; | |
7172 | } | |
7173 | } | |
7174 | ||
7175 | if (!di->i_xattr_loc) | |
7176 | goto out_unlock; | |
7177 | ||
7178 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
7179 | &blk_bh); | |
7180 | if (ret < 0) { | |
7181 | mlog_errno(ret); | |
7182 | goto out_unlock; | |
7183 | } | |
7184 | ||
7185 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
7186 | if (ret) | |
7187 | mlog_errno(ret); | |
7188 | ||
7189 | brelse(blk_bh); | |
7190 | ||
7191 | out_unlock: | |
7192 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7193 | ref_tree, 1); | |
7194 | brelse(ref_root_bh); | |
7195 | ||
7196 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
7197 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
7198 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
7199 | } | |
7200 | ||
7201 | out: | |
7202 | return ret; | |
7203 | } | |
7204 | ||
0fe9b66c TM |
7205 | /* |
7206 | * Initialize security and acl for a already created inode. | |
7207 | * Used for reflink a non-preserve-security file. | |
7208 | * | |
7209 | * It uses common api like ocfs2_xattr_set, so the caller | |
7210 | * must not hold any lock expect i_mutex. | |
7211 | */ | |
7212 | int ocfs2_init_security_and_acl(struct inode *dir, | |
2a7dba39 | 7213 | struct inode *inode, |
c25a1e06 | 7214 | const struct qstr *qstr) |
0fe9b66c | 7215 | { |
702e5bc6 | 7216 | int ret = 0; |
c25a1e06 | 7217 | struct buffer_head *dir_bh = NULL; |
0fe9b66c | 7218 | |
9d8f13ba | 7219 | ret = ocfs2_init_security_get(inode, dir, qstr, NULL); |
32918dd9 | 7220 | if (ret) { |
0fe9b66c TM |
7221 | mlog_errno(ret); |
7222 | goto leave; | |
7223 | } | |
7224 | ||
7225 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
7226 | if (ret) { | |
7227 | mlog_errno(ret); | |
7228 | goto leave; | |
7229 | } | |
c25a1e06 JB |
7230 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); |
7231 | if (ret) | |
7232 | mlog_errno(ret); | |
0fe9b66c TM |
7233 | |
7234 | ocfs2_inode_unlock(dir, 0); | |
7235 | brelse(dir_bh); | |
7236 | leave: | |
7237 | return ret; | |
7238 | } | |
1046cb11 | 7239 | |
923f7f31 TY |
7240 | /* |
7241 | * 'security' attributes support | |
7242 | */ | |
d9a82a04 | 7243 | static int ocfs2_xattr_security_get(const struct xattr_handler *handler, |
b296821a AV |
7244 | struct dentry *unused, struct inode *inode, |
7245 | const char *name, void *buffer, size_t size) | |
923f7f31 | 7246 | { |
b296821a | 7247 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, |
431547b3 | 7248 | name, buffer, size); |
923f7f31 TY |
7249 | } |
7250 | ||
d9a82a04 | 7251 | static int ocfs2_xattr_security_set(const struct xattr_handler *handler, |
59301226 AV |
7252 | struct dentry *unused, struct inode *inode, |
7253 | const char *name, const void *value, | |
7254 | size_t size, int flags) | |
923f7f31 | 7255 | { |
59301226 | 7256 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, |
431547b3 | 7257 | name, value, size, flags); |
923f7f31 TY |
7258 | } |
7259 | ||
b519ea6d | 7260 | static int ocfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba MZ |
7261 | void *fs_info) |
7262 | { | |
7263 | const struct xattr *xattr; | |
7264 | int err = 0; | |
7265 | ||
7266 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
7267 | err = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, | |
7268 | xattr->name, xattr->value, | |
7269 | xattr->value_len, XATTR_CREATE); | |
7270 | if (err) | |
7271 | break; | |
7272 | } | |
7273 | return err; | |
7274 | } | |
7275 | ||
534eaddd TY |
7276 | int ocfs2_init_security_get(struct inode *inode, |
7277 | struct inode *dir, | |
2a7dba39 | 7278 | const struct qstr *qstr, |
534eaddd TY |
7279 | struct ocfs2_security_xattr_info *si) |
7280 | { | |
38d59ef6 TY |
7281 | /* check whether ocfs2 support feature xattr */ |
7282 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7283 | return -EOPNOTSUPP; | |
9d8f13ba MZ |
7284 | if (si) |
7285 | return security_old_inode_init_security(inode, dir, qstr, | |
7286 | &si->name, &si->value, | |
7287 | &si->value_len); | |
7288 | ||
7289 | return security_inode_init_security(inode, dir, qstr, | |
7290 | &ocfs2_initxattrs, NULL); | |
534eaddd TY |
7291 | } |
7292 | ||
7293 | int ocfs2_init_security_set(handle_t *handle, | |
7294 | struct inode *inode, | |
7295 | struct buffer_head *di_bh, | |
7296 | struct ocfs2_security_xattr_info *si, | |
7297 | struct ocfs2_alloc_context *xattr_ac, | |
7298 | struct ocfs2_alloc_context *data_ac) | |
7299 | { | |
7300 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7301 | OCFS2_XATTR_INDEX_SECURITY, | |
7302 | si->name, si->value, si->value_len, 0, | |
7303 | xattr_ac, data_ac); | |
7304 | } | |
7305 | ||
537d81ca | 7306 | const struct xattr_handler ocfs2_xattr_security_handler = { |
923f7f31 | 7307 | .prefix = XATTR_SECURITY_PREFIX, |
923f7f31 TY |
7308 | .get = ocfs2_xattr_security_get, |
7309 | .set = ocfs2_xattr_security_set, | |
7310 | }; | |
7311 | ||
99219aea MF |
7312 | /* |
7313 | * 'trusted' attributes support | |
7314 | */ | |
d9a82a04 | 7315 | static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler, |
b296821a AV |
7316 | struct dentry *unused, struct inode *inode, |
7317 | const char *name, void *buffer, size_t size) | |
99219aea | 7318 | { |
b296821a | 7319 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, |
431547b3 | 7320 | name, buffer, size); |
99219aea MF |
7321 | } |
7322 | ||
d9a82a04 | 7323 | static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler, |
59301226 AV |
7324 | struct dentry *unused, struct inode *inode, |
7325 | const char *name, const void *value, | |
7326 | size_t size, int flags) | |
99219aea | 7327 | { |
59301226 | 7328 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, |
431547b3 | 7329 | name, value, size, flags); |
99219aea MF |
7330 | } |
7331 | ||
537d81ca | 7332 | const struct xattr_handler ocfs2_xattr_trusted_handler = { |
99219aea | 7333 | .prefix = XATTR_TRUSTED_PREFIX, |
99219aea MF |
7334 | .get = ocfs2_xattr_trusted_get, |
7335 | .set = ocfs2_xattr_trusted_set, | |
7336 | }; | |
7337 | ||
99219aea MF |
7338 | /* |
7339 | * 'user' attributes support | |
7340 | */ | |
d9a82a04 | 7341 | static int ocfs2_xattr_user_get(const struct xattr_handler *handler, |
84d86e6d | 7342 | struct dentry *unused, struct inode *inode, |
b296821a | 7343 | const char *name, void *buffer, size_t size) |
99219aea | 7344 | { |
b296821a | 7345 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
99219aea | 7346 | |
99219aea MF |
7347 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
7348 | return -EOPNOTSUPP; | |
b296821a | 7349 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, |
99219aea MF |
7350 | buffer, size); |
7351 | } | |
7352 | ||
d9a82a04 | 7353 | static int ocfs2_xattr_user_set(const struct xattr_handler *handler, |
59301226 AV |
7354 | struct dentry *unused, struct inode *inode, |
7355 | const char *name, const void *value, | |
7356 | size_t size, int flags) | |
99219aea | 7357 | { |
59301226 | 7358 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
99219aea | 7359 | |
99219aea MF |
7360 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
7361 | return -EOPNOTSUPP; | |
7362 | ||
59301226 | 7363 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, |
431547b3 | 7364 | name, value, size, flags); |
99219aea MF |
7365 | } |
7366 | ||
537d81ca | 7367 | const struct xattr_handler ocfs2_xattr_user_handler = { |
99219aea | 7368 | .prefix = XATTR_USER_PREFIX, |
99219aea MF |
7369 | .get = ocfs2_xattr_user_get, |
7370 | .set = ocfs2_xattr_user_set, | |
7371 | }; |