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f56654c4 TM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * xattr.c | |
5 | * | |
c3cb6827 | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 7 | * |
cf1d6c76 | 8 | * CREDITS: |
c3cb6827 TY |
9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
cf1d6c76 | 11 | * |
f56654c4 TM |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public | |
c3cb6827 | 14 | * License version 2 as published by the Free Software Foundation. |
f56654c4 TM |
15 | * |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
f56654c4 TM |
20 | */ |
21 | ||
cf1d6c76 TY |
22 | #include <linux/capability.h> |
23 | #include <linux/fs.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/pagemap.h> | |
28 | #include <linux/uio.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/splice.h> | |
31 | #include <linux/mount.h> | |
32 | #include <linux/writeback.h> | |
33 | #include <linux/falloc.h> | |
01225596 | 34 | #include <linux/sort.h> |
99219aea MF |
35 | #include <linux/init.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
923f7f31 | 38 | #include <linux/security.h> |
cf1d6c76 | 39 | |
f56654c4 TM |
40 | #define MLOG_MASK_PREFIX ML_XATTR |
41 | #include <cluster/masklog.h> | |
42 | ||
43 | #include "ocfs2.h" | |
44 | #include "alloc.h" | |
d6b32bbb | 45 | #include "blockcheck.h" |
f56654c4 TM |
46 | #include "dlmglue.h" |
47 | #include "file.h" | |
cf1d6c76 TY |
48 | #include "symlink.h" |
49 | #include "sysfile.h" | |
f56654c4 TM |
50 | #include "inode.h" |
51 | #include "journal.h" | |
52 | #include "ocfs2_fs.h" | |
53 | #include "suballoc.h" | |
54 | #include "uptodate.h" | |
55 | #include "buffer_head_io.h" | |
0c044f0b | 56 | #include "super.h" |
cf1d6c76 | 57 | #include "xattr.h" |
492a8a33 | 58 | #include "refcounttree.h" |
0fe9b66c | 59 | #include "acl.h" |
cf1d6c76 TY |
60 | |
61 | struct ocfs2_xattr_def_value_root { | |
62 | struct ocfs2_xattr_value_root xv; | |
63 | struct ocfs2_extent_rec er; | |
64 | }; | |
65 | ||
0c044f0b | 66 | struct ocfs2_xattr_bucket { |
ba937127 JB |
67 | /* The inode these xattrs are associated with */ |
68 | struct inode *bu_inode; | |
69 | ||
70 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 71 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
72 | |
73 | /* How many blocks make up one bucket for this filesystem */ | |
74 | int bu_blocks; | |
0c044f0b TM |
75 | }; |
76 | ||
78f30c31 | 77 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 78 | handle_t *handle; |
78f30c31 TM |
79 | struct ocfs2_alloc_context *meta_ac; |
80 | struct ocfs2_alloc_context *data_ac; | |
81 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
82 | }; | |
83 | ||
cf1d6c76 TY |
84 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
85 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 86 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
87 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
88 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 89 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
90 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
91 | - sizeof(struct ocfs2_xattr_block) \ | |
92 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 93 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
94 | |
95 | static struct ocfs2_xattr_def_value_root def_xv = { | |
96 | .xv.xr_list.l_count = cpu_to_le16(1), | |
97 | }; | |
98 | ||
99 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
100 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
101 | &ocfs2_xattr_acl_access_handler, |
102 | &ocfs2_xattr_acl_default_handler, | |
cf1d6c76 | 103 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 104 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
105 | NULL |
106 | }; | |
107 | ||
c988fd04 | 108 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 109 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
110 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
111 | = &ocfs2_xattr_acl_access_handler, | |
112 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
113 | = &ocfs2_xattr_acl_default_handler, | |
cf1d6c76 | 114 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 115 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
116 | }; |
117 | ||
118 | struct ocfs2_xattr_info { | |
6b240ff6 JB |
119 | int xi_name_index; |
120 | const char *xi_name; | |
18853b95 | 121 | int xi_name_len; |
6b240ff6 JB |
122 | const void *xi_value; |
123 | size_t xi_value_len; | |
cf1d6c76 TY |
124 | }; |
125 | ||
126 | struct ocfs2_xattr_search { | |
127 | struct buffer_head *inode_bh; | |
128 | /* | |
129 | * xattr_bh point to the block buffer head which has extended attribute | |
130 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
131 | */ | |
132 | struct buffer_head *xattr_bh; | |
133 | struct ocfs2_xattr_header *header; | |
ba937127 | 134 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
135 | void *base; |
136 | void *end; | |
137 | struct ocfs2_xattr_entry *here; | |
138 | int not_found; | |
139 | }; | |
140 | ||
11179f2c JB |
141 | /* Operations on struct ocfs2_xa_entry */ |
142 | struct ocfs2_xa_loc; | |
143 | struct ocfs2_xa_loc_operations { | |
cf2bc809 JB |
144 | /* |
145 | * Journal functions | |
146 | */ | |
147 | int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc, | |
148 | int type); | |
149 | void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc); | |
150 | ||
11179f2c JB |
151 | /* |
152 | * Return a pointer to the appropriate buffer in loc->xl_storage | |
153 | * at the given offset from loc->xl_header. | |
154 | */ | |
155 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); | |
156 | ||
69a3e539 JB |
157 | /* Can we reuse the existing entry for the new value? */ |
158 | int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc, | |
159 | struct ocfs2_xattr_info *xi); | |
160 | ||
161 | /* How much space is needed for the new value? */ | |
162 | int (*xlo_check_space)(struct ocfs2_xa_loc *loc, | |
163 | struct ocfs2_xattr_info *xi); | |
164 | ||
165 | /* | |
166 | * Return the offset of the first name+value pair. This is | |
167 | * the start of our downward-filling free space. | |
168 | */ | |
169 | int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc); | |
170 | ||
11179f2c JB |
171 | /* |
172 | * Remove the name+value at this location. Do whatever is | |
173 | * appropriate with the remaining name+value pairs. | |
174 | */ | |
175 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); | |
69a3e539 JB |
176 | |
177 | /* Fill xl_entry with a new entry */ | |
178 | void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash); | |
179 | ||
180 | /* Add name+value storage to an entry */ | |
181 | void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size); | |
3fc12afa JB |
182 | |
183 | /* | |
184 | * Initialize the value buf's access and bh fields for this entry. | |
185 | * ocfs2_xa_fill_value_buf() will handle the xv pointer. | |
186 | */ | |
187 | void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc, | |
188 | struct ocfs2_xattr_value_buf *vb); | |
11179f2c JB |
189 | }; |
190 | ||
191 | /* | |
192 | * Describes an xattr entry location. This is a memory structure | |
193 | * tracking the on-disk structure. | |
194 | */ | |
195 | struct ocfs2_xa_loc { | |
cf2bc809 JB |
196 | /* This xattr belongs to this inode */ |
197 | struct inode *xl_inode; | |
198 | ||
11179f2c JB |
199 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ |
200 | struct ocfs2_xattr_header *xl_header; | |
201 | ||
202 | /* Bytes from xl_header to the end of the storage */ | |
203 | int xl_size; | |
204 | ||
205 | /* | |
206 | * The ocfs2_xattr_entry this location describes. If this is | |
207 | * NULL, this location describes the on-disk structure where it | |
208 | * would have been. | |
209 | */ | |
210 | struct ocfs2_xattr_entry *xl_entry; | |
211 | ||
212 | /* | |
213 | * Internal housekeeping | |
214 | */ | |
215 | ||
216 | /* Buffer(s) containing this entry */ | |
217 | void *xl_storage; | |
218 | ||
219 | /* Operations on the storage backing this location */ | |
220 | const struct ocfs2_xa_loc_operations *xl_ops; | |
221 | }; | |
222 | ||
199799a3 JB |
223 | /* |
224 | * Convenience functions to calculate how much space is needed for a | |
225 | * given name+value pair | |
226 | */ | |
227 | static int namevalue_size(int name_len, uint64_t value_len) | |
228 | { | |
229 | if (value_len > OCFS2_XATTR_INLINE_SIZE) | |
230 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
231 | else | |
232 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
233 | } | |
234 | ||
235 | static int namevalue_size_xi(struct ocfs2_xattr_info *xi) | |
236 | { | |
237 | return namevalue_size(xi->xi_name_len, xi->xi_value_len); | |
238 | } | |
239 | ||
240 | static int namevalue_size_xe(struct ocfs2_xattr_entry *xe) | |
241 | { | |
242 | u64 value_len = le64_to_cpu(xe->xe_value_size); | |
243 | ||
244 | BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) && | |
245 | ocfs2_xattr_is_local(xe)); | |
246 | return namevalue_size(xe->xe_name_len, value_len); | |
247 | } | |
248 | ||
249 | ||
fd68a894 | 250 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
251 | struct ocfs2_xattr_header *xh, |
252 | int index, | |
253 | int *block_off, | |
254 | int *new_offset); | |
255 | ||
54f443f4 JB |
256 | static int ocfs2_xattr_block_find(struct inode *inode, |
257 | int name_index, | |
258 | const char *name, | |
259 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
260 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
261 | struct buffer_head *root_bh, | |
262 | int name_index, | |
263 | const char *name, | |
264 | struct ocfs2_xattr_search *xs); | |
265 | ||
0c044f0b | 266 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 267 | struct buffer_head *blk_bh, |
0c044f0b TM |
268 | char *buffer, |
269 | size_t buffer_size); | |
270 | ||
01225596 | 271 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
272 | struct ocfs2_xattr_search *xs, |
273 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
274 | |
275 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
276 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
277 | struct ocfs2_xattr_search *xs, |
278 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 279 | |
47bca495 TM |
280 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
281 | struct buffer_head *root_bh, | |
282 | u64 blkno, u32 cpos, u32 len, void *para); | |
283 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
284 | struct buffer_head *root_bh, | |
285 | xattr_tree_rec_func *rec_func, | |
286 | void *para); | |
287 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
288 | struct ocfs2_xattr_bucket *bucket, | |
289 | void *para); | |
290 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
291 | struct buffer_head *root_bh, | |
292 | u64 blkno, | |
293 | u32 cpos, | |
294 | u32 len, | |
295 | void *para); | |
296 | ||
c58b6032 JB |
297 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
298 | u64 src_blk, u64 last_blk, u64 to_blk, | |
299 | unsigned int start_bucket, | |
300 | u32 *first_hash); | |
492a8a33 TM |
301 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
302 | struct ocfs2_dinode *di, | |
303 | struct ocfs2_xattr_info *xi, | |
304 | struct ocfs2_xattr_search *xis, | |
305 | struct ocfs2_xattr_search *xbs, | |
306 | struct ocfs2_refcount_tree **ref_tree, | |
307 | int *meta_need, | |
308 | int *credits); | |
ce9c5a54 TM |
309 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
310 | struct ocfs2_xattr_bucket *bucket, | |
311 | int offset, | |
312 | struct ocfs2_xattr_value_root **xv, | |
313 | struct buffer_head **bh); | |
a3944256 | 314 | |
0030e001 TY |
315 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
316 | { | |
317 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
318 | } | |
319 | ||
320 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
321 | { | |
322 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
323 | } | |
324 | ||
9c7759aa | 325 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 326 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 327 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 328 | |
ba937127 | 329 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 330 | { |
ba937127 JB |
331 | struct ocfs2_xattr_bucket *bucket; |
332 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 333 | |
ba937127 JB |
334 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
335 | ||
336 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
337 | if (bucket) { | |
338 | bucket->bu_inode = inode; | |
339 | bucket->bu_blocks = blks; | |
340 | } | |
341 | ||
342 | return bucket; | |
343 | } | |
344 | ||
345 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
346 | { | |
347 | int i; | |
348 | ||
349 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
350 | brelse(bucket->bu_bhs[i]); |
351 | bucket->bu_bhs[i] = NULL; | |
352 | } | |
353 | } | |
354 | ||
ba937127 JB |
355 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
356 | { | |
357 | if (bucket) { | |
358 | ocfs2_xattr_bucket_relse(bucket); | |
359 | bucket->bu_inode = NULL; | |
360 | kfree(bucket); | |
361 | } | |
362 | } | |
363 | ||
784b816a JB |
364 | /* |
365 | * A bucket that has never been written to disk doesn't need to be | |
366 | * read. We just need the buffer_heads. Don't call this for | |
367 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
368 | * them fully. | |
369 | */ | |
ba937127 | 370 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
371 | u64 xb_blkno) |
372 | { | |
373 | int i, rc = 0; | |
784b816a | 374 | |
ba937127 JB |
375 | for (i = 0; i < bucket->bu_blocks; i++) { |
376 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
377 | xb_blkno + i); | |
784b816a JB |
378 | if (!bucket->bu_bhs[i]) { |
379 | rc = -EIO; | |
380 | mlog_errno(rc); | |
381 | break; | |
382 | } | |
383 | ||
8cb471e8 | 384 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 385 | bucket->bu_bhs[i])) |
8cb471e8 | 386 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 387 | bucket->bu_bhs[i]); |
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 | ||
476 | mlog(0, "Validating xattr block %llu\n", | |
477 | (unsigned long long)bh->b_blocknr); | |
478 | ||
d6b32bbb JB |
479 | BUG_ON(!buffer_uptodate(bh)); |
480 | ||
481 | /* | |
482 | * If the ecc fails, we return the error but otherwise | |
483 | * leave the filesystem running. We know any error is | |
484 | * local to this block. | |
485 | */ | |
486 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
487 | if (rc) | |
488 | return rc; | |
489 | ||
490 | /* | |
491 | * Errors after here are fatal | |
492 | */ | |
493 | ||
4ae1d69b JB |
494 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
495 | ocfs2_error(sb, | |
496 | "Extended attribute block #%llu has bad " | |
497 | "signature %.*s", | |
498 | (unsigned long long)bh->b_blocknr, 7, | |
499 | xb->xb_signature); | |
500 | return -EINVAL; | |
501 | } | |
502 | ||
503 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
504 | ocfs2_error(sb, | |
505 | "Extended attribute block #%llu has an " | |
506 | "invalid xb_blkno of %llu", | |
507 | (unsigned long long)bh->b_blocknr, | |
508 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
509 | return -EINVAL; | |
510 | } | |
511 | ||
512 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
513 | ocfs2_error(sb, | |
514 | "Extended attribute block #%llu has an invalid " | |
515 | "xb_fs_generation of #%u", | |
516 | (unsigned long long)bh->b_blocknr, | |
517 | le32_to_cpu(xb->xb_fs_generation)); | |
518 | return -EINVAL; | |
519 | } | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
524 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
525 | struct buffer_head **bh) | |
526 | { | |
527 | int rc; | |
528 | struct buffer_head *tmp = *bh; | |
529 | ||
8cb471e8 | 530 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 531 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
532 | |
533 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
534 | if (!rc && !*bh) | |
535 | *bh = tmp; | |
536 | ||
537 | return rc; | |
538 | } | |
539 | ||
936b8834 | 540 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
541 | { |
542 | struct xattr_handler *handler = NULL; | |
543 | ||
544 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
545 | handler = ocfs2_xattr_handler_map[name_index]; | |
546 | ||
936b8834 | 547 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
548 | } |
549 | ||
40daa16a | 550 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 551 | const char *name, |
40daa16a | 552 | int name_len) |
cf1d6c76 TY |
553 | { |
554 | /* Get hash value of uuid from super block */ | |
555 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
556 | int i; | |
557 | ||
cf1d6c76 TY |
558 | /* hash extended attribute name */ |
559 | for (i = 0; i < name_len; i++) { | |
560 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
561 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
562 | *name++; | |
563 | } | |
564 | ||
565 | return hash; | |
566 | } | |
567 | ||
534eaddd TY |
568 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
569 | { | |
199799a3 JB |
570 | return namevalue_size(name_len, value_len) + |
571 | sizeof(struct ocfs2_xattr_entry); | |
572 | } | |
534eaddd | 573 | |
199799a3 JB |
574 | static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi) |
575 | { | |
576 | return namevalue_size_xi(xi) + | |
577 | sizeof(struct ocfs2_xattr_entry); | |
578 | } | |
534eaddd | 579 | |
199799a3 JB |
580 | static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe) |
581 | { | |
582 | return namevalue_size_xe(xe) + | |
583 | sizeof(struct ocfs2_xattr_entry); | |
534eaddd TY |
584 | } |
585 | ||
586 | int ocfs2_calc_security_init(struct inode *dir, | |
587 | struct ocfs2_security_xattr_info *si, | |
588 | int *want_clusters, | |
589 | int *xattr_credits, | |
590 | struct ocfs2_alloc_context **xattr_ac) | |
591 | { | |
592 | int ret = 0; | |
593 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
594 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
595 | si->value_len); | |
596 | ||
597 | /* | |
598 | * The max space of security xattr taken inline is | |
599 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
600 | * So reserve one metadata block for it is ok. | |
601 | */ | |
602 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
603 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
604 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
605 | if (ret) { | |
606 | mlog_errno(ret); | |
607 | return ret; | |
608 | } | |
609 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
610 | } | |
611 | ||
612 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
613 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
614 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
615 | si->value_len); | |
616 | ||
617 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
618 | new_clusters); | |
619 | *want_clusters += new_clusters; | |
620 | } | |
534eaddd TY |
621 | return ret; |
622 | } | |
623 | ||
89c38bd0 TY |
624 | int ocfs2_calc_xattr_init(struct inode *dir, |
625 | struct buffer_head *dir_bh, | |
626 | int mode, | |
627 | struct ocfs2_security_xattr_info *si, | |
628 | int *want_clusters, | |
629 | int *xattr_credits, | |
9b7895ef | 630 | int *want_meta) |
89c38bd0 TY |
631 | { |
632 | int ret = 0; | |
633 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 634 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
635 | |
636 | if (si->enable) | |
637 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
638 | si->value_len); | |
639 | ||
640 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
641 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
642 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
643 | "", NULL, 0); | |
644 | if (acl_len > 0) { | |
645 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
646 | if (S_ISDIR(mode)) | |
647 | a_size <<= 1; | |
648 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
649 | mlog_errno(ret); | |
650 | return ret; | |
651 | } | |
652 | } | |
653 | ||
654 | if (!(s_size + a_size)) | |
655 | return ret; | |
656 | ||
657 | /* | |
658 | * The max space of security xattr taken inline is | |
659 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
660 | * The max space of acl xattr taken inline is | |
661 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
662 | * when blocksize = 512, may reserve one more cluser for | |
663 | * xattr bucket, otherwise reserve one metadata block | |
664 | * for them is ok. | |
6c9fd1dc TY |
665 | * If this is a new directory with inline data, |
666 | * we choose to reserve the entire inline area for | |
667 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
668 | */ |
669 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 670 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 671 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 672 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
673 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
674 | } | |
675 | ||
676 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
677 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
678 | *want_clusters += 1; | |
679 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
680 | } | |
681 | ||
0e445b6f TY |
682 | /* |
683 | * reserve credits and clusters for xattrs which has large value | |
684 | * and have to be set outside | |
685 | */ | |
686 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
687 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
688 | si->value_len); | |
689 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
690 | new_clusters); | |
691 | *want_clusters += new_clusters; | |
692 | } | |
89c38bd0 TY |
693 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
694 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
695 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
696 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
697 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
698 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
699 | new_clusters); | |
700 | *want_clusters += new_clusters; | |
89c38bd0 TY |
701 | } |
702 | ||
703 | return ret; | |
704 | } | |
705 | ||
f56654c4 TM |
706 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
707 | u32 clusters_to_add, | |
19b801f4 | 708 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 709 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
710 | { |
711 | int status = 0; | |
85db90e7 | 712 | handle_t *handle = ctxt->handle; |
f56654c4 | 713 | enum ocfs2_alloc_restarted why; |
19b801f4 | 714 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 715 | struct ocfs2_extent_tree et; |
f56654c4 TM |
716 | |
717 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
718 | ||
5e404e9e | 719 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 720 | |
0cf2f763 | 721 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 722 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
723 | if (status < 0) { |
724 | mlog_errno(status); | |
725 | goto leave; | |
726 | } | |
727 | ||
19b801f4 | 728 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
cbee7e1a JB |
729 | status = ocfs2_add_clusters_in_btree(handle, |
730 | &et, | |
f56654c4 TM |
731 | &logical_start, |
732 | clusters_to_add, | |
733 | 0, | |
78f30c31 TM |
734 | ctxt->data_ac, |
735 | ctxt->meta_ac, | |
f99b9b7c | 736 | &why); |
85db90e7 TM |
737 | if (status < 0) { |
738 | mlog_errno(status); | |
f56654c4 TM |
739 | goto leave; |
740 | } | |
741 | ||
19b801f4 | 742 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
743 | if (status < 0) { |
744 | mlog_errno(status); | |
745 | goto leave; | |
746 | } | |
747 | ||
19b801f4 | 748 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 749 | |
85db90e7 TM |
750 | /* |
751 | * We should have already allocated enough space before the transaction, | |
752 | * so no need to restart. | |
753 | */ | |
754 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
755 | |
756 | leave: | |
f56654c4 TM |
757 | |
758 | return status; | |
759 | } | |
760 | ||
761 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 762 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 763 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 764 | unsigned int ext_flags, |
78f30c31 | 765 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
766 | { |
767 | int ret; | |
768 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 769 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
770 | struct ocfs2_extent_tree et; |
771 | ||
5e404e9e | 772 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 773 | |
0cf2f763 | 774 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 775 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
776 | if (ret) { |
777 | mlog_errno(ret); | |
85db90e7 | 778 | goto out; |
f56654c4 TM |
779 | } |
780 | ||
dbdcf6a4 | 781 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 782 | &ctxt->dealloc); |
f56654c4 TM |
783 | if (ret) { |
784 | mlog_errno(ret); | |
85db90e7 | 785 | goto out; |
f56654c4 TM |
786 | } |
787 | ||
d72cc72d | 788 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 789 | |
d72cc72d | 790 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
791 | if (ret) { |
792 | mlog_errno(ret); | |
85db90e7 | 793 | goto out; |
f56654c4 TM |
794 | } |
795 | ||
492a8a33 TM |
796 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
797 | ret = ocfs2_decrease_refcount(inode, handle, | |
798 | ocfs2_blocks_to_clusters(inode->i_sb, | |
799 | phys_blkno), | |
800 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
801 | else | |
802 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
803 | phys_blkno, len); | |
f56654c4 TM |
804 | if (ret) |
805 | mlog_errno(ret); | |
806 | ||
f56654c4 | 807 | out: |
f56654c4 TM |
808 | return ret; |
809 | } | |
810 | ||
811 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
812 | u32 old_clusters, | |
813 | u32 new_clusters, | |
19b801f4 | 814 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 815 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
816 | { |
817 | int ret = 0; | |
492a8a33 | 818 | unsigned int ext_flags; |
f56654c4 TM |
819 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
820 | u64 block; | |
f56654c4 TM |
821 | |
822 | if (old_clusters <= new_clusters) | |
823 | return 0; | |
824 | ||
825 | cpos = new_clusters; | |
826 | trunc_len = old_clusters - new_clusters; | |
827 | while (trunc_len) { | |
828 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 829 | &alloc_size, |
492a8a33 | 830 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
831 | if (ret) { |
832 | mlog_errno(ret); | |
833 | goto out; | |
834 | } | |
835 | ||
836 | if (alloc_size > trunc_len) | |
837 | alloc_size = trunc_len; | |
838 | ||
19b801f4 | 839 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 840 | phys_cpos, alloc_size, |
492a8a33 | 841 | ext_flags, ctxt); |
f56654c4 TM |
842 | if (ret) { |
843 | mlog_errno(ret); | |
844 | goto out; | |
845 | } | |
846 | ||
847 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
848 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
849 | block, alloc_size); | |
f56654c4 TM |
850 | cpos += alloc_size; |
851 | trunc_len -= alloc_size; | |
852 | } | |
853 | ||
854 | out: | |
f56654c4 TM |
855 | return ret; |
856 | } | |
857 | ||
858 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 859 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
860 | int len, |
861 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
862 | { |
863 | int ret; | |
864 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 865 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
866 | |
867 | if (new_clusters == old_clusters) | |
868 | return 0; | |
869 | ||
870 | if (new_clusters > old_clusters) | |
871 | ret = ocfs2_xattr_extend_allocation(inode, | |
872 | new_clusters - old_clusters, | |
b3e5d379 | 873 | vb, ctxt); |
f56654c4 TM |
874 | else |
875 | ret = ocfs2_xattr_shrink_size(inode, | |
876 | old_clusters, new_clusters, | |
b3e5d379 | 877 | vb, ctxt); |
f56654c4 TM |
878 | |
879 | return ret; | |
880 | } | |
cf1d6c76 | 881 | |
936b8834 TM |
882 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
883 | size_t *result, const char *prefix, | |
884 | const char *name, int name_len) | |
885 | { | |
886 | char *p = buffer + *result; | |
887 | int prefix_len = strlen(prefix); | |
888 | int total_len = prefix_len + name_len + 1; | |
889 | ||
890 | *result += total_len; | |
891 | ||
892 | /* we are just looking for how big our buffer needs to be */ | |
893 | if (!size) | |
894 | return 0; | |
895 | ||
896 | if (*result > size) | |
897 | return -ERANGE; | |
898 | ||
899 | memcpy(p, prefix, prefix_len); | |
900 | memcpy(p + prefix_len, name, name_len); | |
901 | p[prefix_len + name_len] = '\0'; | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
cf1d6c76 TY |
906 | static int ocfs2_xattr_list_entries(struct inode *inode, |
907 | struct ocfs2_xattr_header *header, | |
908 | char *buffer, size_t buffer_size) | |
909 | { | |
936b8834 TM |
910 | size_t result = 0; |
911 | int i, type, ret; | |
912 | const char *prefix, *name; | |
cf1d6c76 TY |
913 | |
914 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
915 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
916 | type = ocfs2_xattr_get_type(entry); |
917 | prefix = ocfs2_xattr_prefix(type); | |
918 | ||
919 | if (prefix) { | |
920 | name = (const char *)header + | |
921 | le16_to_cpu(entry->xe_name_offset); | |
922 | ||
923 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
924 | &result, prefix, name, | |
925 | entry->xe_name_len); | |
926 | if (ret) | |
927 | return ret; | |
cf1d6c76 TY |
928 | } |
929 | } | |
930 | ||
936b8834 | 931 | return result; |
cf1d6c76 TY |
932 | } |
933 | ||
8b2c0dba TM |
934 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
935 | struct ocfs2_dinode *di) | |
936 | { | |
937 | struct ocfs2_xattr_header *xh; | |
938 | int i; | |
939 | ||
940 | xh = (struct ocfs2_xattr_header *) | |
941 | ((void *)di + inode->i_sb->s_blocksize - | |
942 | le16_to_cpu(di->i_xattr_inline_size)); | |
943 | ||
944 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
945 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
946 | return 1; | |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
cf1d6c76 TY |
951 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
952 | struct ocfs2_dinode *di, | |
953 | char *buffer, | |
954 | size_t buffer_size) | |
955 | { | |
956 | struct ocfs2_xattr_header *header = NULL; | |
957 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
958 | int ret = 0; | |
959 | ||
960 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
961 | return ret; | |
962 | ||
963 | header = (struct ocfs2_xattr_header *) | |
964 | ((void *)di + inode->i_sb->s_blocksize - | |
965 | le16_to_cpu(di->i_xattr_inline_size)); | |
966 | ||
967 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
968 | ||
969 | return ret; | |
970 | } | |
971 | ||
972 | static int ocfs2_xattr_block_list(struct inode *inode, | |
973 | struct ocfs2_dinode *di, | |
974 | char *buffer, | |
975 | size_t buffer_size) | |
976 | { | |
977 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 978 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
979 | int ret = 0; |
980 | ||
981 | if (!di->i_xattr_loc) | |
982 | return ret; | |
983 | ||
4ae1d69b JB |
984 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
985 | &blk_bh); | |
cf1d6c76 TY |
986 | if (ret < 0) { |
987 | mlog_errno(ret); | |
988 | return ret; | |
989 | } | |
cf1d6c76 | 990 | |
0c044f0b | 991 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
992 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
993 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
994 | ret = ocfs2_xattr_list_entries(inode, header, | |
995 | buffer, buffer_size); | |
47bca495 TM |
996 | } else |
997 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 998 | buffer, buffer_size); |
4ae1d69b | 999 | |
cf1d6c76 TY |
1000 | brelse(blk_bh); |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
1006 | char *buffer, | |
1007 | size_t size) | |
1008 | { | |
1009 | int ret = 0, i_ret = 0, b_ret = 0; | |
1010 | struct buffer_head *di_bh = NULL; | |
1011 | struct ocfs2_dinode *di = NULL; | |
1012 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
1013 | ||
8154da3d TY |
1014 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
1015 | return -EOPNOTSUPP; | |
1016 | ||
cf1d6c76 TY |
1017 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1018 | return ret; | |
1019 | ||
1020 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
1021 | if (ret < 0) { | |
1022 | mlog_errno(ret); | |
1023 | return ret; | |
1024 | } | |
1025 | ||
1026 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1027 | ||
1028 | down_read(&oi->ip_xattr_sem); | |
1029 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
1030 | if (i_ret < 0) | |
1031 | b_ret = 0; | |
1032 | else { | |
1033 | if (buffer) { | |
1034 | buffer += i_ret; | |
1035 | size -= i_ret; | |
1036 | } | |
1037 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
1038 | buffer, size); | |
1039 | if (b_ret < 0) | |
1040 | i_ret = 0; | |
1041 | } | |
1042 | up_read(&oi->ip_xattr_sem); | |
1043 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
1044 | ||
1045 | brelse(di_bh); | |
1046 | ||
1047 | return i_ret + b_ret; | |
1048 | } | |
1049 | ||
1050 | static int ocfs2_xattr_find_entry(int name_index, | |
1051 | const char *name, | |
1052 | struct ocfs2_xattr_search *xs) | |
1053 | { | |
1054 | struct ocfs2_xattr_entry *entry; | |
1055 | size_t name_len; | |
1056 | int i, cmp = 1; | |
1057 | ||
1058 | if (name == NULL) | |
1059 | return -EINVAL; | |
1060 | ||
1061 | name_len = strlen(name); | |
1062 | entry = xs->here; | |
1063 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1064 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
1065 | if (!cmp) | |
1066 | cmp = name_len - entry->xe_name_len; | |
1067 | if (!cmp) | |
1068 | cmp = memcmp(name, (xs->base + | |
1069 | le16_to_cpu(entry->xe_name_offset)), | |
1070 | name_len); | |
1071 | if (cmp == 0) | |
1072 | break; | |
1073 | entry += 1; | |
1074 | } | |
1075 | xs->here = entry; | |
1076 | ||
1077 | return cmp ? -ENODATA : 0; | |
1078 | } | |
1079 | ||
1080 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 1081 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
1082 | void *buffer, |
1083 | size_t len) | |
1084 | { | |
1085 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1086 | u64 blkno; | |
1087 | int i, ret = 0; | |
1088 | size_t cplen, blocksize; | |
1089 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1090 | struct ocfs2_extent_list *el; |
1091 | ||
cf1d6c76 TY |
1092 | el = &xv->xr_list; |
1093 | clusters = le32_to_cpu(xv->xr_clusters); | |
1094 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1095 | blocksize = inode->i_sb->s_blocksize; | |
1096 | ||
1097 | cpos = 0; | |
1098 | while (cpos < clusters) { | |
1099 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1100 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1101 | if (ret) { |
1102 | mlog_errno(ret); | |
1103 | goto out; | |
1104 | } | |
1105 | ||
1106 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1107 | /* Copy ocfs2_xattr_value */ | |
1108 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1109 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1110 | &bh, NULL); | |
cf1d6c76 TY |
1111 | if (ret) { |
1112 | mlog_errno(ret); | |
1113 | goto out; | |
1114 | } | |
1115 | ||
1116 | cplen = len >= blocksize ? blocksize : len; | |
1117 | memcpy(buffer, bh->b_data, cplen); | |
1118 | len -= cplen; | |
1119 | buffer += cplen; | |
1120 | ||
1121 | brelse(bh); | |
1122 | bh = NULL; | |
1123 | if (len == 0) | |
1124 | break; | |
1125 | } | |
1126 | cpos += num_clusters; | |
1127 | } | |
1128 | out: | |
1129 | return ret; | |
1130 | } | |
1131 | ||
1132 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1133 | int name_index, | |
1134 | const char *name, | |
1135 | void *buffer, | |
1136 | size_t buffer_size, | |
1137 | struct ocfs2_xattr_search *xs) | |
1138 | { | |
1139 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1140 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1141 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1142 | size_t size; |
1143 | int ret = 0; | |
1144 | ||
1145 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1146 | return -ENODATA; | |
1147 | ||
1148 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1149 | xs->header = (struct ocfs2_xattr_header *) | |
1150 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1151 | xs->base = (void *)xs->header; | |
1152 | xs->here = xs->header->xh_entries; | |
1153 | ||
1154 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1155 | if (ret) | |
1156 | return ret; | |
1157 | size = le64_to_cpu(xs->here->xe_value_size); | |
1158 | if (buffer) { | |
1159 | if (size > buffer_size) | |
1160 | return -ERANGE; | |
1161 | if (ocfs2_xattr_is_local(xs->here)) { | |
1162 | memcpy(buffer, (void *)xs->base + | |
1163 | le16_to_cpu(xs->here->xe_name_offset) + | |
1164 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1165 | } else { | |
589dc260 TM |
1166 | xv = (struct ocfs2_xattr_value_root *) |
1167 | (xs->base + le16_to_cpu( | |
1168 | xs->here->xe_name_offset) + | |
1169 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1170 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1171 | buffer, size); |
1172 | if (ret < 0) { | |
1173 | mlog_errno(ret); | |
1174 | return ret; | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | return size; | |
1180 | } | |
1181 | ||
1182 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1183 | int name_index, | |
1184 | const char *name, | |
1185 | void *buffer, | |
1186 | size_t buffer_size, | |
1187 | struct ocfs2_xattr_search *xs) | |
1188 | { | |
cf1d6c76 | 1189 | struct ocfs2_xattr_block *xb; |
589dc260 | 1190 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1191 | size_t size; |
44d8e4e1 SM |
1192 | int ret = -ENODATA, name_offset, name_len, i; |
1193 | int uninitialized_var(block_off); | |
cf1d6c76 | 1194 | |
ba937127 JB |
1195 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1196 | if (!xs->bucket) { | |
1197 | ret = -ENOMEM; | |
1198 | mlog_errno(ret); | |
1199 | goto cleanup; | |
1200 | } | |
589dc260 | 1201 | |
54f443f4 JB |
1202 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1203 | if (ret) { | |
cf1d6c76 | 1204 | mlog_errno(ret); |
cf1d6c76 TY |
1205 | goto cleanup; |
1206 | } | |
1207 | ||
6c1e183e TY |
1208 | if (xs->not_found) { |
1209 | ret = -ENODATA; | |
1210 | goto cleanup; | |
1211 | } | |
1212 | ||
54f443f4 | 1213 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1214 | size = le64_to_cpu(xs->here->xe_value_size); |
1215 | if (buffer) { | |
1216 | ret = -ERANGE; | |
1217 | if (size > buffer_size) | |
1218 | goto cleanup; | |
589dc260 TM |
1219 | |
1220 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1221 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1222 | i = xs->here - xs->header->xh_entries; | |
1223 | ||
1224 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1225 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1226 | bucket_xh(xs->bucket), |
589dc260 TM |
1227 | i, |
1228 | &block_off, | |
1229 | &name_offset); | |
ba937127 | 1230 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1231 | } |
cf1d6c76 TY |
1232 | if (ocfs2_xattr_is_local(xs->here)) { |
1233 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1234 | name_offset + name_len, size); |
cf1d6c76 | 1235 | } else { |
589dc260 TM |
1236 | xv = (struct ocfs2_xattr_value_root *) |
1237 | (xs->base + name_offset + name_len); | |
1238 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1239 | buffer, size); |
1240 | if (ret < 0) { | |
1241 | mlog_errno(ret); | |
1242 | goto cleanup; | |
1243 | } | |
1244 | } | |
1245 | } | |
1246 | ret = size; | |
1247 | cleanup: | |
ba937127 | 1248 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1249 | |
54f443f4 JB |
1250 | brelse(xs->xattr_bh); |
1251 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1252 | return ret; |
1253 | } | |
1254 | ||
4e3e9d02 TY |
1255 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1256 | struct buffer_head *di_bh, | |
0030e001 TY |
1257 | int name_index, |
1258 | const char *name, | |
1259 | void *buffer, | |
1260 | size_t buffer_size) | |
cf1d6c76 TY |
1261 | { |
1262 | int ret; | |
1263 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1264 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1265 | struct ocfs2_xattr_search xis = { | |
1266 | .not_found = -ENODATA, | |
1267 | }; | |
1268 | struct ocfs2_xattr_search xbs = { | |
1269 | .not_found = -ENODATA, | |
1270 | }; | |
1271 | ||
8154da3d TY |
1272 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1273 | return -EOPNOTSUPP; | |
1274 | ||
cf1d6c76 TY |
1275 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1276 | ret = -ENODATA; | |
1277 | ||
cf1d6c76 TY |
1278 | xis.inode_bh = xbs.inode_bh = di_bh; |
1279 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1280 | ||
1281 | down_read(&oi->ip_xattr_sem); | |
1282 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1283 | buffer_size, &xis); | |
6c1e183e | 1284 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1285 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1286 | buffer_size, &xbs); | |
1287 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1288 | |
1289 | return ret; | |
1290 | } | |
1291 | ||
1292 | /* ocfs2_xattr_get() | |
1293 | * | |
1294 | * Copy an extended attribute into the buffer provided. | |
1295 | * Buffer is NULL to compute the size of buffer required. | |
1296 | */ | |
1297 | static int ocfs2_xattr_get(struct inode *inode, | |
1298 | int name_index, | |
1299 | const char *name, | |
1300 | void *buffer, | |
1301 | size_t buffer_size) | |
1302 | { | |
1303 | int ret; | |
1304 | struct buffer_head *di_bh = NULL; | |
1305 | ||
1306 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1307 | if (ret < 0) { | |
1308 | mlog_errno(ret); | |
1309 | return ret; | |
1310 | } | |
1311 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1312 | name, buffer, buffer_size); | |
1313 | ||
cf1d6c76 TY |
1314 | ocfs2_inode_unlock(inode, 0); |
1315 | ||
1316 | brelse(di_bh); | |
1317 | ||
1318 | return ret; | |
1319 | } | |
1320 | ||
1321 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1322 | handle_t *handle, |
492a8a33 | 1323 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1324 | const void *value, |
1325 | int value_len) | |
1326 | { | |
71d548a6 | 1327 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1328 | u16 blocksize = inode->i_sb->s_blocksize; |
1329 | u32 p_cluster, num_clusters; | |
1330 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1331 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1332 | u64 blkno; | |
1333 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1334 | unsigned int ext_flags; |
1335 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1336 | |
1337 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1338 | ||
cf1d6c76 TY |
1339 | while (cpos < clusters) { |
1340 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1341 | &num_clusters, &xv->xr_list, |
492a8a33 | 1342 | &ext_flags); |
cf1d6c76 TY |
1343 | if (ret) { |
1344 | mlog_errno(ret); | |
85db90e7 | 1345 | goto out; |
cf1d6c76 TY |
1346 | } |
1347 | ||
492a8a33 TM |
1348 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1349 | ||
cf1d6c76 TY |
1350 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1351 | ||
1352 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1353 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1354 | &bh, NULL); | |
cf1d6c76 TY |
1355 | if (ret) { |
1356 | mlog_errno(ret); | |
85db90e7 | 1357 | goto out; |
cf1d6c76 TY |
1358 | } |
1359 | ||
1360 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1361 | INODE_CACHE(inode), |
cf1d6c76 TY |
1362 | bh, |
1363 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1364 | if (ret < 0) { | |
1365 | mlog_errno(ret); | |
85db90e7 | 1366 | goto out; |
cf1d6c76 TY |
1367 | } |
1368 | ||
1369 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1370 | memcpy(bh->b_data, value, cp_len); | |
1371 | value_len -= cp_len; | |
1372 | value += cp_len; | |
1373 | if (cp_len < blocksize) | |
1374 | memset(bh->b_data + cp_len, 0, | |
1375 | blocksize - cp_len); | |
1376 | ||
1377 | ret = ocfs2_journal_dirty(handle, bh); | |
1378 | if (ret < 0) { | |
1379 | mlog_errno(ret); | |
85db90e7 | 1380 | goto out; |
cf1d6c76 TY |
1381 | } |
1382 | brelse(bh); | |
1383 | bh = NULL; | |
1384 | ||
1385 | /* | |
1386 | * XXX: do we need to empty all the following | |
1387 | * blocks in this cluster? | |
1388 | */ | |
1389 | if (!value_len) | |
1390 | break; | |
1391 | } | |
1392 | cpos += num_clusters; | |
1393 | } | |
cf1d6c76 TY |
1394 | out: |
1395 | brelse(bh); | |
1396 | ||
1397 | return ret; | |
1398 | } | |
1399 | ||
69a3e539 JB |
1400 | static int ocfs2_xa_check_space_helper(int needed_space, int free_start, |
1401 | int num_entries) | |
1402 | { | |
1403 | int free_space; | |
1404 | ||
1405 | if (!needed_space) | |
1406 | return 0; | |
1407 | ||
1408 | free_space = free_start - | |
1409 | sizeof(struct ocfs2_xattr_header) - | |
1410 | (num_entries * sizeof(struct ocfs2_xattr_entry)) - | |
1411 | OCFS2_XATTR_HEADER_GAP; | |
1412 | if (free_space < 0) | |
1413 | return -EIO; | |
1414 | if (free_space < needed_space) | |
1415 | return -ENOSPC; | |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
cf2bc809 JB |
1420 | static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc, |
1421 | int type) | |
1422 | { | |
1423 | return loc->xl_ops->xlo_journal_access(handle, loc, type); | |
1424 | } | |
1425 | ||
1426 | static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc) | |
1427 | { | |
1428 | loc->xl_ops->xlo_journal_dirty(handle, loc); | |
1429 | } | |
1430 | ||
69a3e539 JB |
1431 | /* Give a pointer into the storage for the given offset */ |
1432 | static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset) | |
1433 | { | |
1434 | BUG_ON(offset >= loc->xl_size); | |
1435 | return loc->xl_ops->xlo_offset_pointer(loc, offset); | |
1436 | } | |
1437 | ||
11179f2c JB |
1438 | /* |
1439 | * Wipe the name+value pair and allow the storage to reclaim it. This | |
1440 | * must be followed by either removal of the entry or a call to | |
1441 | * ocfs2_xa_add_namevalue(). | |
1442 | */ | |
1443 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1444 | { | |
1445 | loc->xl_ops->xlo_wipe_namevalue(loc); | |
1446 | } | |
1447 | ||
69a3e539 JB |
1448 | /* |
1449 | * Find lowest offset to a name+value pair. This is the start of our | |
1450 | * downward-growing free space. | |
1451 | */ | |
1452 | static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc) | |
1453 | { | |
1454 | return loc->xl_ops->xlo_get_free_start(loc); | |
1455 | } | |
1456 | ||
1457 | /* Can we reuse loc->xl_entry for xi? */ | |
1458 | static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc, | |
1459 | struct ocfs2_xattr_info *xi) | |
1460 | { | |
1461 | return loc->xl_ops->xlo_can_reuse(loc, xi); | |
1462 | } | |
1463 | ||
1464 | /* How much free space is needed to set the new value */ | |
1465 | static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc, | |
1466 | struct ocfs2_xattr_info *xi) | |
1467 | { | |
1468 | return loc->xl_ops->xlo_check_space(loc, xi); | |
1469 | } | |
1470 | ||
1471 | static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) | |
1472 | { | |
1473 | loc->xl_ops->xlo_add_entry(loc, name_hash); | |
1474 | loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash); | |
1475 | /* | |
1476 | * We can't leave the new entry's xe_name_offset at zero or | |
1477 | * add_namevalue() will go nuts. We set it to the size of our | |
1478 | * storage so that it can never be less than any other entry. | |
1479 | */ | |
1480 | loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size); | |
1481 | } | |
1482 | ||
1483 | static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc, | |
1484 | struct ocfs2_xattr_info *xi) | |
1485 | { | |
1486 | int size = namevalue_size_xi(xi); | |
1487 | int nameval_offset; | |
1488 | char *nameval_buf; | |
1489 | ||
1490 | loc->xl_ops->xlo_add_namevalue(loc, size); | |
1491 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
1492 | loc->xl_entry->xe_name_len = xi->xi_name_len; | |
1493 | ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index); | |
1494 | ocfs2_xattr_set_local(loc->xl_entry, | |
1495 | xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE); | |
1496 | ||
1497 | nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1498 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); | |
1499 | memset(nameval_buf, 0, size); | |
1500 | memcpy(nameval_buf, xi->xi_name, xi->xi_name_len); | |
1501 | } | |
1502 | ||
3fc12afa JB |
1503 | static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc, |
1504 | struct ocfs2_xattr_value_buf *vb) | |
1505 | { | |
1506 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1507 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
1508 | ||
1509 | /* Value bufs are for value trees */ | |
73857ee0 | 1510 | BUG_ON(ocfs2_xattr_is_local(loc->xl_entry)); |
3fc12afa JB |
1511 | BUG_ON(namevalue_size_xe(loc->xl_entry) != |
1512 | (name_size + OCFS2_XATTR_ROOT_SIZE)); | |
1513 | ||
1514 | loc->xl_ops->xlo_fill_value_buf(loc, vb); | |
1515 | vb->vb_xv = | |
1516 | (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc, | |
1517 | nameval_offset + | |
1518 | name_size); | |
1519 | } | |
1520 | ||
cf2bc809 JB |
1521 | static int ocfs2_xa_block_journal_access(handle_t *handle, |
1522 | struct ocfs2_xa_loc *loc, int type) | |
1523 | { | |
1524 | struct buffer_head *bh = loc->xl_storage; | |
1525 | ocfs2_journal_access_func access; | |
1526 | ||
1527 | if (loc->xl_size == (bh->b_size - | |
1528 | offsetof(struct ocfs2_xattr_block, | |
1529 | xb_attrs.xb_header))) | |
1530 | access = ocfs2_journal_access_xb; | |
1531 | else | |
1532 | access = ocfs2_journal_access_di; | |
1533 | return access(handle, INODE_CACHE(loc->xl_inode), bh, type); | |
1534 | } | |
1535 | ||
1536 | static void ocfs2_xa_block_journal_dirty(handle_t *handle, | |
1537 | struct ocfs2_xa_loc *loc) | |
1538 | { | |
1539 | struct buffer_head *bh = loc->xl_storage; | |
1540 | ||
1541 | ocfs2_journal_dirty(handle, bh); | |
1542 | } | |
1543 | ||
11179f2c JB |
1544 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, |
1545 | int offset) | |
1546 | { | |
11179f2c JB |
1547 | return (char *)loc->xl_header + offset; |
1548 | } | |
1549 | ||
69a3e539 JB |
1550 | static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc, |
1551 | struct ocfs2_xattr_info *xi) | |
1552 | { | |
1553 | /* | |
1554 | * Block storage is strict. If the sizes aren't exact, we will | |
1555 | * remove the old one and reinsert the new. | |
1556 | */ | |
1557 | return namevalue_size_xe(loc->xl_entry) == | |
1558 | namevalue_size_xi(xi); | |
1559 | } | |
1560 | ||
1561 | static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc) | |
1562 | { | |
1563 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1564 | int i, count = le16_to_cpu(xh->xh_count); | |
1565 | int offset, free_start = loc->xl_size; | |
1566 | ||
1567 | for (i = 0; i < count; i++) { | |
1568 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1569 | if (offset < free_start) | |
1570 | free_start = offset; | |
1571 | } | |
1572 | ||
1573 | return free_start; | |
1574 | } | |
1575 | ||
1576 | static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc, | |
1577 | struct ocfs2_xattr_info *xi) | |
1578 | { | |
1579 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1580 | int free_start = ocfs2_xa_get_free_start(loc); | |
1581 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1582 | ||
1583 | /* | |
1584 | * Block storage will reclaim the original entry before inserting | |
1585 | * the new value, so we only need the difference. If the new | |
1586 | * entry is smaller than the old one, we don't need anything. | |
1587 | */ | |
1588 | if (loc->xl_entry) { | |
1589 | /* Don't need space if we're reusing! */ | |
1590 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1591 | needed_space = 0; | |
1592 | else | |
1593 | needed_space -= ocfs2_xe_entry_usage(loc->xl_entry); | |
1594 | } | |
1595 | if (needed_space < 0) | |
1596 | needed_space = 0; | |
1597 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1598 | } | |
1599 | ||
11179f2c JB |
1600 | /* |
1601 | * Block storage for xattrs keeps the name+value pairs compacted. When | |
1602 | * we remove one, we have to shift any that preceded it towards the end. | |
1603 | */ | |
1604 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1605 | { | |
1606 | int i, offset; | |
1607 | int namevalue_offset, first_namevalue_offset, namevalue_size; | |
1608 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1609 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
11179f2c JB |
1610 | int count = le16_to_cpu(xh->xh_count); |
1611 | ||
1612 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); | |
199799a3 | 1613 | namevalue_size = namevalue_size_xe(entry); |
69a3e539 | 1614 | first_namevalue_offset = ocfs2_xa_get_free_start(loc); |
11179f2c JB |
1615 | |
1616 | /* Shift the name+value pairs */ | |
1617 | memmove((char *)xh + first_namevalue_offset + namevalue_size, | |
1618 | (char *)xh + first_namevalue_offset, | |
1619 | namevalue_offset - first_namevalue_offset); | |
1620 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); | |
1621 | ||
1622 | /* Now tell xh->xh_entries about it */ | |
1623 | for (i = 0; i < count; i++) { | |
1624 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1625 | if (offset < namevalue_offset) | |
1626 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, | |
1627 | namevalue_size); | |
1628 | } | |
1629 | ||
1630 | /* | |
1631 | * Note that we don't update xh_free_start or xh_name_value_len | |
1632 | * because they're not used in block-stored xattrs. | |
1633 | */ | |
1634 | } | |
1635 | ||
69a3e539 JB |
1636 | static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1637 | { | |
1638 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1639 | loc->xl_entry = &(loc->xl_header->xh_entries[count]); | |
1640 | le16_add_cpu(&loc->xl_header->xh_count, 1); | |
1641 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1642 | } | |
1643 | ||
1644 | static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1645 | { | |
1646 | int free_start = ocfs2_xa_get_free_start(loc); | |
1647 | ||
1648 | loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size); | |
1649 | } | |
1650 | ||
3fc12afa JB |
1651 | static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc, |
1652 | struct ocfs2_xattr_value_buf *vb) | |
1653 | { | |
1654 | struct buffer_head *bh = loc->xl_storage; | |
1655 | ||
1656 | if (loc->xl_size == (bh->b_size - | |
1657 | offsetof(struct ocfs2_xattr_block, | |
1658 | xb_attrs.xb_header))) | |
1659 | vb->vb_access = ocfs2_journal_access_xb; | |
1660 | else | |
1661 | vb->vb_access = ocfs2_journal_access_di; | |
1662 | vb->vb_bh = bh; | |
1663 | } | |
1664 | ||
11179f2c JB |
1665 | /* |
1666 | * Operations for xattrs stored in blocks. This includes inline inode | |
1667 | * storage and unindexed ocfs2_xattr_blocks. | |
1668 | */ | |
1669 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { | |
cf2bc809 JB |
1670 | .xlo_journal_access = ocfs2_xa_block_journal_access, |
1671 | .xlo_journal_dirty = ocfs2_xa_block_journal_dirty, | |
11179f2c | 1672 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, |
69a3e539 JB |
1673 | .xlo_check_space = ocfs2_xa_block_check_space, |
1674 | .xlo_can_reuse = ocfs2_xa_block_can_reuse, | |
1675 | .xlo_get_free_start = ocfs2_xa_block_get_free_start, | |
11179f2c | 1676 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, |
69a3e539 JB |
1677 | .xlo_add_entry = ocfs2_xa_block_add_entry, |
1678 | .xlo_add_namevalue = ocfs2_xa_block_add_namevalue, | |
3fc12afa | 1679 | .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf, |
11179f2c JB |
1680 | }; |
1681 | ||
cf2bc809 JB |
1682 | static int ocfs2_xa_bucket_journal_access(handle_t *handle, |
1683 | struct ocfs2_xa_loc *loc, int type) | |
1684 | { | |
1685 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1686 | ||
1687 | return ocfs2_xattr_bucket_journal_access(handle, bucket, type); | |
1688 | } | |
1689 | ||
1690 | static void ocfs2_xa_bucket_journal_dirty(handle_t *handle, | |
1691 | struct ocfs2_xa_loc *loc) | |
1692 | { | |
1693 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1694 | ||
1695 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
1696 | } | |
1697 | ||
11179f2c JB |
1698 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, |
1699 | int offset) | |
1700 | { | |
1701 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1702 | int block, block_offset; | |
1703 | ||
11179f2c | 1704 | /* The header is at the front of the bucket */ |
cf2bc809 JB |
1705 | block = offset >> loc->xl_inode->i_sb->s_blocksize_bits; |
1706 | block_offset = offset % loc->xl_inode->i_sb->s_blocksize; | |
11179f2c JB |
1707 | |
1708 | return bucket_block(bucket, block) + block_offset; | |
1709 | } | |
1710 | ||
69a3e539 JB |
1711 | static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc, |
1712 | struct ocfs2_xattr_info *xi) | |
1713 | { | |
1714 | return namevalue_size_xe(loc->xl_entry) >= | |
1715 | namevalue_size_xi(xi); | |
1716 | } | |
1717 | ||
1718 | static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc) | |
1719 | { | |
1720 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1721 | return le16_to_cpu(bucket_xh(bucket)->xh_free_start); | |
1722 | } | |
1723 | ||
1724 | static int ocfs2_bucket_align_free_start(struct super_block *sb, | |
1725 | int free_start, int size) | |
1726 | { | |
1727 | /* | |
1728 | * We need to make sure that the name+value pair fits within | |
1729 | * one block. | |
1730 | */ | |
1731 | if (((free_start - size) >> sb->s_blocksize_bits) != | |
1732 | ((free_start - 1) >> sb->s_blocksize_bits)) | |
1733 | free_start -= free_start % sb->s_blocksize; | |
1734 | ||
1735 | return free_start; | |
1736 | } | |
1737 | ||
1738 | static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc, | |
1739 | struct ocfs2_xattr_info *xi) | |
1740 | { | |
1741 | int rc; | |
1742 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1743 | int free_start = ocfs2_xa_get_free_start(loc); | |
1744 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1745 | int size = namevalue_size_xi(xi); | |
cf2bc809 | 1746 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1747 | |
1748 | /* | |
1749 | * Bucket storage does not reclaim name+value pairs it cannot | |
1750 | * reuse. They live as holes until the bucket fills, and then | |
1751 | * the bucket is defragmented. However, the bucket can reclaim | |
1752 | * the ocfs2_xattr_entry. | |
1753 | */ | |
1754 | if (loc->xl_entry) { | |
1755 | /* Don't need space if we're reusing! */ | |
1756 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1757 | needed_space = 0; | |
1758 | else | |
1759 | needed_space -= sizeof(struct ocfs2_xattr_entry); | |
1760 | } | |
1761 | BUG_ON(needed_space < 0); | |
1762 | ||
1763 | if (free_start < size) { | |
1764 | if (needed_space) | |
1765 | return -ENOSPC; | |
1766 | } else { | |
1767 | /* | |
1768 | * First we check if it would fit in the first place. | |
1769 | * Below, we align the free start to a block. This may | |
1770 | * slide us below the minimum gap. By checking unaligned | |
1771 | * first, we avoid that error. | |
1772 | */ | |
1773 | rc = ocfs2_xa_check_space_helper(needed_space, free_start, | |
1774 | count); | |
1775 | if (rc) | |
1776 | return rc; | |
1777 | free_start = ocfs2_bucket_align_free_start(sb, free_start, | |
1778 | size); | |
1779 | } | |
1780 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1781 | } | |
1782 | ||
11179f2c JB |
1783 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) |
1784 | { | |
199799a3 JB |
1785 | le16_add_cpu(&loc->xl_header->xh_name_value_len, |
1786 | -namevalue_size_xe(loc->xl_entry)); | |
11179f2c JB |
1787 | } |
1788 | ||
69a3e539 JB |
1789 | static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1790 | { | |
1791 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1792 | int count = le16_to_cpu(xh->xh_count); | |
1793 | int low = 0, high = count - 1, tmp; | |
1794 | struct ocfs2_xattr_entry *tmp_xe; | |
1795 | ||
1796 | /* | |
1797 | * We keep buckets sorted by name_hash, so we need to find | |
1798 | * our insert place. | |
1799 | */ | |
1800 | while (low <= high && count) { | |
1801 | tmp = (low + high) / 2; | |
1802 | tmp_xe = &xh->xh_entries[tmp]; | |
1803 | ||
1804 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
1805 | low = tmp + 1; | |
1806 | else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash)) | |
1807 | high = tmp - 1; | |
1808 | else { | |
1809 | low = tmp; | |
1810 | break; | |
1811 | } | |
1812 | } | |
1813 | ||
1814 | if (low != count) | |
1815 | memmove(&xh->xh_entries[low + 1], | |
1816 | &xh->xh_entries[low], | |
1817 | ((count - low) * sizeof(struct ocfs2_xattr_entry))); | |
1818 | ||
1819 | le16_add_cpu(&xh->xh_count, 1); | |
1820 | loc->xl_entry = &xh->xh_entries[low]; | |
1821 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1822 | } | |
1823 | ||
1824 | static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1825 | { | |
1826 | int free_start = ocfs2_xa_get_free_start(loc); | |
1827 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
cf2bc809 | 1828 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1829 | int nameval_offset; |
1830 | ||
1831 | free_start = ocfs2_bucket_align_free_start(sb, free_start, size); | |
1832 | nameval_offset = free_start - size; | |
1833 | loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset); | |
1834 | xh->xh_free_start = cpu_to_le16(nameval_offset); | |
1835 | le16_add_cpu(&xh->xh_name_value_len, size); | |
1836 | ||
1837 | } | |
1838 | ||
3fc12afa JB |
1839 | static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc, |
1840 | struct ocfs2_xattr_value_buf *vb) | |
1841 | { | |
1842 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
cf2bc809 | 1843 | struct super_block *sb = loc->xl_inode->i_sb; |
3fc12afa JB |
1844 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
1845 | int size = namevalue_size_xe(loc->xl_entry); | |
1846 | int block_offset = nameval_offset >> sb->s_blocksize_bits; | |
1847 | ||
1848 | /* Values are not allowed to straddle block boundaries */ | |
1849 | BUG_ON(block_offset != | |
1850 | ((nameval_offset + size - 1) >> sb->s_blocksize_bits)); | |
1851 | /* We expect the bucket to be filled in */ | |
1852 | BUG_ON(!bucket->bu_bhs[block_offset]); | |
1853 | ||
1854 | vb->vb_access = ocfs2_journal_access; | |
1855 | vb->vb_bh = bucket->bu_bhs[block_offset]; | |
1856 | } | |
1857 | ||
11179f2c JB |
1858 | /* Operations for xattrs stored in buckets. */ |
1859 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { | |
cf2bc809 JB |
1860 | .xlo_journal_access = ocfs2_xa_bucket_journal_access, |
1861 | .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty, | |
11179f2c | 1862 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, |
69a3e539 JB |
1863 | .xlo_check_space = ocfs2_xa_bucket_check_space, |
1864 | .xlo_can_reuse = ocfs2_xa_bucket_can_reuse, | |
1865 | .xlo_get_free_start = ocfs2_xa_bucket_get_free_start, | |
11179f2c | 1866 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, |
69a3e539 JB |
1867 | .xlo_add_entry = ocfs2_xa_bucket_add_entry, |
1868 | .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue, | |
3fc12afa | 1869 | .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf, |
11179f2c JB |
1870 | }; |
1871 | ||
399ff3a7 JB |
1872 | static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc) |
1873 | { | |
1874 | struct ocfs2_xattr_value_buf vb; | |
1875 | ||
1876 | if (ocfs2_xattr_is_local(loc->xl_entry)) | |
1877 | return 0; | |
1878 | ||
1879 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1880 | return le32_to_cpu(vb.vb_xv->xr_clusters); | |
1881 | } | |
1882 | ||
73857ee0 JB |
1883 | static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes, |
1884 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1885 | { | |
1886 | int trunc_rc, access_rc; | |
1887 | struct ocfs2_xattr_value_buf vb; | |
1888 | ||
1889 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1890 | trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes, | |
1891 | ctxt); | |
1892 | ||
1893 | /* | |
1894 | * The caller of ocfs2_xa_value_truncate() has already called | |
1895 | * ocfs2_xa_journal_access on the loc. However, The truncate code | |
1896 | * calls ocfs2_extend_trans(). This may commit the previous | |
1897 | * transaction and open a new one. If this is a bucket, truncate | |
1898 | * could leave only vb->vb_bh set up for journaling. Meanwhile, | |
1899 | * the caller is expecting to dirty the entire bucket. So we must | |
1900 | * reset the journal work. We do this even if truncate has failed, | |
1901 | * as it could have failed after committing the extend. | |
1902 | */ | |
1903 | access_rc = ocfs2_xa_journal_access(ctxt->handle, loc, | |
1904 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1905 | ||
1906 | /* Errors in truncate take precedence */ | |
1907 | return trunc_rc ? trunc_rc : access_rc; | |
1908 | } | |
1909 | ||
11179f2c JB |
1910 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) |
1911 | { | |
bde1e540 JB |
1912 | int index, count; |
1913 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1914 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1915 | ||
11179f2c | 1916 | ocfs2_xa_wipe_namevalue(loc); |
bde1e540 JB |
1917 | loc->xl_entry = NULL; |
1918 | ||
1919 | le16_add_cpu(&xh->xh_count, -1); | |
1920 | count = le16_to_cpu(xh->xh_count); | |
1921 | ||
1922 | /* | |
1923 | * Only zero out the entry if there are more remaining. This is | |
1924 | * important for an empty bucket, as it keeps track of the | |
1925 | * bucket's hash value. It doesn't hurt empty block storage. | |
1926 | */ | |
1927 | if (count) { | |
1928 | index = ((char *)entry - (char *)&xh->xh_entries) / | |
1929 | sizeof(struct ocfs2_xattr_entry); | |
1930 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], | |
1931 | (count - index) * sizeof(struct ocfs2_xattr_entry)); | |
1932 | memset(&xh->xh_entries[count], 0, | |
1933 | sizeof(struct ocfs2_xattr_entry)); | |
1934 | } | |
11179f2c JB |
1935 | } |
1936 | ||
399ff3a7 JB |
1937 | /* |
1938 | * If we have a problem adjusting the size of an external value during | |
1939 | * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr | |
1940 | * in an intermediate state. For example, the value may be partially | |
1941 | * truncated. | |
1942 | * | |
1943 | * If the value tree hasn't changed, the extend/truncate went nowhere. | |
1944 | * We have nothing to do. The caller can treat it as a straight error. | |
1945 | * | |
1946 | * If the value tree got partially truncated, we now have a corrupted | |
1947 | * extended attribute. We're going to wipe its entry and leak the | |
1948 | * clusters. Better to leak some storage than leave a corrupt entry. | |
1949 | * | |
1950 | * If the value tree grew, it obviously didn't grow enough for the | |
1951 | * new entry. We're not going to try and reclaim those clusters either. | |
1952 | * If there was already an external value there (orig_clusters != 0), | |
1953 | * the new clusters are attached safely and we can just leave the old | |
1954 | * value in place. If there was no external value there, we remove | |
1955 | * the entry. | |
1956 | * | |
1957 | * This way, the xattr block we store in the journal will be consistent. | |
1958 | * If the size change broke because of the journal, no changes will hit | |
1959 | * disk anyway. | |
1960 | */ | |
1961 | static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc, | |
1962 | const char *what, | |
1963 | unsigned int orig_clusters) | |
1964 | { | |
1965 | unsigned int new_clusters = ocfs2_xa_value_clusters(loc); | |
1966 | char *nameval_buf = ocfs2_xa_offset_pointer(loc, | |
1967 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
1968 | ||
1969 | if (new_clusters < orig_clusters) { | |
1970 | mlog(ML_ERROR, | |
1971 | "Partial truncate while %s xattr %.*s. Leaking " | |
1972 | "%u clusters and removing the entry\n", | |
1973 | what, loc->xl_entry->xe_name_len, nameval_buf, | |
1974 | orig_clusters - new_clusters); | |
1975 | ocfs2_xa_remove_entry(loc); | |
1976 | } else if (!orig_clusters) { | |
1977 | mlog(ML_ERROR, | |
1978 | "Unable to allocate an external value for xattr " | |
1979 | "%.*s safely. Leaking %u clusters and removing the " | |
1980 | "entry\n", | |
1981 | loc->xl_entry->xe_name_len, nameval_buf, | |
1982 | new_clusters - orig_clusters); | |
1983 | ocfs2_xa_remove_entry(loc); | |
1984 | } else if (new_clusters > orig_clusters) | |
1985 | mlog(ML_ERROR, | |
1986 | "Unable to grow xattr %.*s safely. %u new clusters " | |
1987 | "have been added, but the value will not be " | |
1988 | "modified\n", | |
1989 | loc->xl_entry->xe_name_len, nameval_buf, | |
1990 | new_clusters - orig_clusters); | |
1991 | } | |
1992 | ||
73857ee0 JB |
1993 | static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc, |
1994 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1995 | { | |
1996 | int rc = 0; | |
399ff3a7 | 1997 | unsigned int orig_clusters; |
73857ee0 JB |
1998 | |
1999 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { | |
399ff3a7 | 2000 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2001 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2002 | if (rc) { | |
2003 | mlog_errno(rc); | |
399ff3a7 JB |
2004 | /* |
2005 | * Since this is remove, we can return 0 if | |
2006 | * ocfs2_xa_cleanup_value_truncate() is going to | |
2007 | * wipe the entry anyway. So we check the | |
2008 | * cluster count as well. | |
2009 | */ | |
2010 | if (orig_clusters != ocfs2_xa_value_clusters(loc)) | |
2011 | rc = 0; | |
2012 | ocfs2_xa_cleanup_value_truncate(loc, "removing", | |
2013 | orig_clusters); | |
2014 | if (rc) | |
2015 | goto out; | |
73857ee0 JB |
2016 | } |
2017 | } | |
2018 | ||
2019 | ocfs2_xa_remove_entry(loc); | |
2020 | ||
2021 | out: | |
2022 | return rc; | |
2023 | } | |
2024 | ||
2025 | static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc) | |
2026 | { | |
2027 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
2028 | char *nameval_buf; | |
2029 | ||
2030 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2031 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2032 | memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE); | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * Take an existing entry and make it ready for the new value. This | |
2037 | * won't allocate space, but it may free space. It should be ready for | |
2038 | * ocfs2_xa_prepare_entry() to finish the work. | |
2039 | */ | |
2040 | static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc, | |
2041 | struct ocfs2_xattr_info *xi, | |
2042 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2043 | { | |
2044 | int rc = 0; | |
2045 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
399ff3a7 | 2046 | unsigned int orig_clusters; |
73857ee0 JB |
2047 | char *nameval_buf; |
2048 | int xe_local = ocfs2_xattr_is_local(loc->xl_entry); | |
2049 | int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE; | |
2050 | ||
2051 | BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) != | |
2052 | name_size); | |
2053 | ||
2054 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2055 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2056 | if (xe_local) { | |
2057 | memset(nameval_buf + name_size, 0, | |
2058 | namevalue_size_xe(loc->xl_entry) - name_size); | |
2059 | if (!xi_local) | |
2060 | ocfs2_xa_install_value_root(loc); | |
2061 | } else { | |
399ff3a7 | 2062 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2063 | if (xi_local) { |
2064 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); | |
399ff3a7 | 2065 | if (rc < 0) |
73857ee0 | 2066 | mlog_errno(rc); |
399ff3a7 JB |
2067 | else |
2068 | memset(nameval_buf + name_size, 0, | |
2069 | namevalue_size_xe(loc->xl_entry) - | |
2070 | name_size); | |
73857ee0 JB |
2071 | } else if (le64_to_cpu(loc->xl_entry->xe_value_size) > |
2072 | xi->xi_value_len) { | |
2073 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, | |
2074 | ctxt); | |
399ff3a7 | 2075 | if (rc < 0) |
73857ee0 | 2076 | mlog_errno(rc); |
399ff3a7 JB |
2077 | } |
2078 | ||
2079 | if (rc) { | |
2080 | ocfs2_xa_cleanup_value_truncate(loc, "reusing", | |
2081 | orig_clusters); | |
2082 | goto out; | |
73857ee0 JB |
2083 | } |
2084 | } | |
2085 | ||
2086 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
2087 | ocfs2_xattr_set_local(loc->xl_entry, xi_local); | |
2088 | ||
2089 | out: | |
2090 | return rc; | |
2091 | } | |
2092 | ||
69a3e539 JB |
2093 | /* |
2094 | * Prepares loc->xl_entry to receive the new xattr. This includes | |
2095 | * properly setting up the name+value pair region. If loc->xl_entry | |
2096 | * already exists, it will take care of modifying it appropriately. | |
69a3e539 JB |
2097 | * |
2098 | * Note that this modifies the data. You did journal_access already, | |
2099 | * right? | |
2100 | */ | |
2101 | static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc, | |
2102 | struct ocfs2_xattr_info *xi, | |
73857ee0 JB |
2103 | u32 name_hash, |
2104 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 JB |
2105 | { |
2106 | int rc = 0; | |
399ff3a7 JB |
2107 | unsigned int orig_clusters; |
2108 | __le64 orig_value_size = 0; | |
69a3e539 | 2109 | |
69a3e539 JB |
2110 | rc = ocfs2_xa_check_space(loc, xi); |
2111 | if (rc) | |
2112 | goto out; | |
2113 | ||
2114 | if (loc->xl_entry) { | |
2115 | if (ocfs2_xa_can_reuse_entry(loc, xi)) { | |
399ff3a7 | 2116 | orig_value_size = loc->xl_entry->xe_value_size; |
73857ee0 JB |
2117 | rc = ocfs2_xa_reuse_entry(loc, xi, ctxt); |
2118 | if (rc) | |
2119 | goto out; | |
2120 | goto alloc_value; | |
69a3e539 JB |
2121 | } |
2122 | ||
73857ee0 | 2123 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
399ff3a7 | 2124 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2125 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2126 | if (rc) { | |
2127 | mlog_errno(rc); | |
399ff3a7 JB |
2128 | ocfs2_xa_cleanup_value_truncate(loc, |
2129 | "overwriting", | |
2130 | orig_clusters); | |
73857ee0 JB |
2131 | goto out; |
2132 | } | |
2133 | } | |
69a3e539 JB |
2134 | ocfs2_xa_wipe_namevalue(loc); |
2135 | } else | |
2136 | ocfs2_xa_add_entry(loc, name_hash); | |
2137 | ||
2138 | /* | |
2139 | * If we get here, we have a blank entry. Fill it. We grow our | |
2140 | * name+value pair back from the end. | |
2141 | */ | |
2142 | ocfs2_xa_add_namevalue(loc, xi); | |
73857ee0 JB |
2143 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
2144 | ocfs2_xa_install_value_root(loc); | |
2145 | ||
2146 | alloc_value: | |
2147 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { | |
399ff3a7 | 2148 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 | 2149 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt); |
399ff3a7 JB |
2150 | if (rc < 0) { |
2151 | /* | |
2152 | * If we tried to grow an existing external value, | |
2153 | * ocfs2_xa_cleanuP-value_truncate() is going to | |
2154 | * let it stand. We have to restore its original | |
2155 | * value size. | |
2156 | */ | |
2157 | loc->xl_entry->xe_value_size = orig_value_size; | |
2158 | ocfs2_xa_cleanup_value_truncate(loc, "growing", | |
2159 | orig_clusters); | |
73857ee0 | 2160 | mlog_errno(rc); |
399ff3a7 | 2161 | } |
73857ee0 | 2162 | } |
69a3e539 JB |
2163 | |
2164 | out: | |
2165 | return rc; | |
2166 | } | |
2167 | ||
2168 | /* | |
73857ee0 JB |
2169 | * Store the value portion of the name+value pair. This will skip |
2170 | * values that are stored externally. Their tree roots were set up | |
2171 | * by ocfs2_xa_prepare_entry(). | |
69a3e539 | 2172 | */ |
73857ee0 JB |
2173 | static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc, |
2174 | struct ocfs2_xattr_info *xi, | |
2175 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 | 2176 | { |
73857ee0 | 2177 | int rc = 0; |
69a3e539 JB |
2178 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
2179 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
69a3e539 | 2180 | char *nameval_buf; |
73857ee0 | 2181 | struct ocfs2_xattr_value_buf vb; |
69a3e539 | 2182 | |
69a3e539 | 2183 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
73857ee0 JB |
2184 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
2185 | ocfs2_xa_fill_value_buf(loc, &vb); | |
2186 | rc = __ocfs2_xattr_set_value_outside(loc->xl_inode, | |
2187 | ctxt->handle, &vb, | |
2188 | xi->xi_value, | |
2189 | xi->xi_value_len); | |
2190 | } else | |
2191 | memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len); | |
2192 | ||
73857ee0 | 2193 | return rc; |
69a3e539 JB |
2194 | } |
2195 | ||
bca5e9bd JB |
2196 | static int ocfs2_xa_set(struct ocfs2_xa_loc *loc, |
2197 | struct ocfs2_xattr_info *xi, | |
2198 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2199 | { | |
2200 | int ret; | |
2201 | u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name, | |
2202 | xi->xi_name_len); | |
2203 | ||
2204 | ret = ocfs2_xa_journal_access(ctxt->handle, loc, | |
2205 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2206 | if (ret) { | |
2207 | mlog_errno(ret); | |
2208 | goto out; | |
2209 | } | |
2210 | ||
399ff3a7 JB |
2211 | /* |
2212 | * From here on out, everything is going to modify the buffer a | |
2213 | * little. Errors are going to leave the xattr header in a | |
2214 | * sane state. Thus, even with errors we dirty the sucker. | |
2215 | */ | |
2216 | ||
bca5e9bd JB |
2217 | /* Don't worry, we are never called with !xi_value and !xl_entry */ |
2218 | if (!xi->xi_value) { | |
2219 | ret = ocfs2_xa_remove(loc, ctxt); | |
399ff3a7 | 2220 | goto out_dirty; |
bca5e9bd JB |
2221 | } |
2222 | ||
2223 | ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt); | |
2224 | if (ret) { | |
2225 | if (ret != -ENOSPC) | |
2226 | mlog_errno(ret); | |
399ff3a7 | 2227 | goto out_dirty; |
bca5e9bd JB |
2228 | } |
2229 | ||
2230 | ret = ocfs2_xa_store_value(loc, xi, ctxt); | |
399ff3a7 | 2231 | if (ret) |
bca5e9bd | 2232 | mlog_errno(ret); |
bca5e9bd | 2233 | |
399ff3a7 | 2234 | out_dirty: |
bca5e9bd JB |
2235 | ocfs2_xa_journal_dirty(ctxt->handle, loc); |
2236 | ||
2237 | out: | |
2238 | return ret; | |
2239 | } | |
2240 | ||
11179f2c JB |
2241 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, |
2242 | struct inode *inode, | |
2243 | struct buffer_head *bh, | |
2244 | struct ocfs2_xattr_entry *entry) | |
2245 | { | |
2246 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; | |
2247 | ||
139fface JB |
2248 | BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL)); |
2249 | ||
cf2bc809 | 2250 | loc->xl_inode = inode; |
11179f2c JB |
2251 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2252 | loc->xl_storage = bh; | |
2253 | loc->xl_entry = entry; | |
139fface | 2254 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); |
11179f2c JB |
2255 | loc->xl_header = |
2256 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - | |
2257 | loc->xl_size); | |
2258 | } | |
2259 | ||
2260 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, | |
cf2bc809 | 2261 | struct inode *inode, |
11179f2c JB |
2262 | struct buffer_head *bh, |
2263 | struct ocfs2_xattr_entry *entry) | |
2264 | { | |
2265 | struct ocfs2_xattr_block *xb = | |
2266 | (struct ocfs2_xattr_block *)bh->b_data; | |
2267 | ||
2268 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); | |
2269 | ||
cf2bc809 | 2270 | loc->xl_inode = inode; |
11179f2c JB |
2271 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2272 | loc->xl_storage = bh; | |
2273 | loc->xl_header = &(xb->xb_attrs.xb_header); | |
2274 | loc->xl_entry = entry; | |
2275 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, | |
2276 | xb_attrs.xb_header); | |
2277 | } | |
2278 | ||
2279 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, | |
2280 | struct ocfs2_xattr_bucket *bucket, | |
2281 | struct ocfs2_xattr_entry *entry) | |
2282 | { | |
cf2bc809 | 2283 | loc->xl_inode = bucket->bu_inode; |
11179f2c JB |
2284 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; |
2285 | loc->xl_storage = bucket; | |
2286 | loc->xl_header = bucket_xh(bucket); | |
2287 | loc->xl_entry = entry; | |
2288 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; | |
2289 | } | |
2290 | ||
ce9c5a54 TM |
2291 | /* |
2292 | * In xattr remove, if it is stored outside and refcounted, we may have | |
2293 | * the chance to split the refcount tree. So need the allocators. | |
2294 | */ | |
2295 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
2296 | struct ocfs2_xattr_value_root *xv, | |
2297 | struct ocfs2_caching_info *ref_ci, | |
2298 | struct buffer_head *ref_root_bh, | |
2299 | struct ocfs2_alloc_context **meta_ac, | |
2300 | int *ref_credits) | |
2301 | { | |
2302 | int ret, meta_add = 0; | |
2303 | u32 p_cluster, num_clusters; | |
2304 | unsigned int ext_flags; | |
2305 | ||
2306 | *ref_credits = 0; | |
2307 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
2308 | &num_clusters, | |
2309 | &xv->xr_list, | |
2310 | &ext_flags); | |
2311 | if (ret) { | |
2312 | mlog_errno(ret); | |
2313 | goto out; | |
2314 | } | |
2315 | ||
2316 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
2317 | goto out; | |
2318 | ||
2319 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
2320 | ref_root_bh, xv, | |
2321 | &meta_add, ref_credits); | |
2322 | if (ret) { | |
2323 | mlog_errno(ret); | |
2324 | goto out; | |
2325 | } | |
2326 | ||
2327 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
2328 | meta_add, meta_ac); | |
2329 | if (ret) | |
2330 | mlog_errno(ret); | |
2331 | ||
2332 | out: | |
2333 | return ret; | |
2334 | } | |
2335 | ||
cf1d6c76 | 2336 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 2337 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
2338 | struct ocfs2_xattr_header *header, |
2339 | struct ocfs2_caching_info *ref_ci, | |
2340 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 2341 | { |
ce9c5a54 | 2342 | int ret = 0, i, ref_credits; |
78f30c31 TM |
2343 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2344 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 2345 | void *val; |
78f30c31 TM |
2346 | |
2347 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
2348 | |
2349 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
2350 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
2351 | ||
ce9c5a54 TM |
2352 | if (ocfs2_xattr_is_local(entry)) |
2353 | continue; | |
cf1d6c76 | 2354 | |
ce9c5a54 TM |
2355 | val = (void *)header + |
2356 | le16_to_cpu(entry->xe_name_offset); | |
2357 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
2358 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
2359 | ||
2360 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
2361 | ref_ci, ref_root_bh, | |
2362 | &ctxt.meta_ac, | |
2363 | &ref_credits); | |
2364 | ||
2365 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
2366 | ocfs2_remove_extent_credits(osb->sb)); | |
2367 | if (IS_ERR(ctxt.handle)) { | |
2368 | ret = PTR_ERR(ctxt.handle); | |
2369 | mlog_errno(ret); | |
2370 | break; | |
2371 | } | |
2372 | ||
2373 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
2374 | if (ret < 0) { | |
2375 | mlog_errno(ret); | |
2376 | break; | |
2377 | } | |
2378 | ||
2379 | ocfs2_commit_trans(osb, ctxt.handle); | |
2380 | if (ctxt.meta_ac) { | |
2381 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2382 | ctxt.meta_ac = NULL; | |
cf1d6c76 TY |
2383 | } |
2384 | } | |
2385 | ||
ce9c5a54 TM |
2386 | if (ctxt.meta_ac) |
2387 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
2388 | ocfs2_schedule_truncate_log_flush(osb, 1); |
2389 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2390 | return ret; |
2391 | } | |
2392 | ||
2393 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
2394 | struct buffer_head *di_bh, |
2395 | struct ocfs2_caching_info *ref_ci, | |
2396 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2397 | { |
2398 | ||
2399 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2400 | struct ocfs2_xattr_header *header; | |
2401 | int ret; | |
4311901d JB |
2402 | struct ocfs2_xattr_value_buf vb = { |
2403 | .vb_bh = di_bh, | |
2404 | .vb_access = ocfs2_journal_access_di, | |
2405 | }; | |
cf1d6c76 TY |
2406 | |
2407 | header = (struct ocfs2_xattr_header *) | |
2408 | ((void *)di + inode->i_sb->s_blocksize - | |
2409 | le16_to_cpu(di->i_xattr_inline_size)); | |
2410 | ||
ce9c5a54 TM |
2411 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2412 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2413 | |
2414 | return ret; | |
2415 | } | |
2416 | ||
ce9c5a54 TM |
2417 | struct ocfs2_rm_xattr_bucket_para { |
2418 | struct ocfs2_caching_info *ref_ci; | |
2419 | struct buffer_head *ref_root_bh; | |
2420 | }; | |
2421 | ||
cf1d6c76 | 2422 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
2423 | struct buffer_head *blk_bh, |
2424 | struct ocfs2_caching_info *ref_ci, | |
2425 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2426 | { |
2427 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 2428 | int ret = 0; |
4311901d JB |
2429 | struct ocfs2_xattr_value_buf vb = { |
2430 | .vb_bh = blk_bh, | |
2431 | .vb_access = ocfs2_journal_access_xb, | |
2432 | }; | |
ce9c5a54 TM |
2433 | struct ocfs2_rm_xattr_bucket_para args = { |
2434 | .ref_ci = ref_ci, | |
2435 | .ref_root_bh = ref_root_bh, | |
2436 | }; | |
cf1d6c76 TY |
2437 | |
2438 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
2439 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
2440 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
2441 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2442 | ref_ci, ref_root_bh); | |
a3944256 | 2443 | } else |
47bca495 TM |
2444 | ret = ocfs2_iterate_xattr_index_block(inode, |
2445 | blk_bh, | |
2446 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 2447 | &args); |
cf1d6c76 TY |
2448 | |
2449 | return ret; | |
2450 | } | |
2451 | ||
08413899 | 2452 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
2453 | u64 block, |
2454 | struct ocfs2_caching_info *ref_ci, | |
2455 | struct buffer_head *ref_root_bh) | |
08413899 TM |
2456 | { |
2457 | struct inode *xb_alloc_inode; | |
2458 | struct buffer_head *xb_alloc_bh = NULL; | |
2459 | struct buffer_head *blk_bh = NULL; | |
2460 | struct ocfs2_xattr_block *xb; | |
2461 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2462 | handle_t *handle; | |
2463 | int ret = 0; | |
2464 | u64 blk, bg_blkno; | |
2465 | u16 bit; | |
2466 | ||
4ae1d69b | 2467 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
2468 | if (ret < 0) { |
2469 | mlog_errno(ret); | |
2470 | goto out; | |
2471 | } | |
2472 | ||
ce9c5a54 | 2473 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
2474 | if (ret < 0) { |
2475 | mlog_errno(ret); | |
2476 | goto out; | |
2477 | } | |
2478 | ||
4ae1d69b | 2479 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
2480 | blk = le64_to_cpu(xb->xb_blkno); |
2481 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
2482 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2483 | ||
2484 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2485 | EXTENT_ALLOC_SYSTEM_INODE, | |
2486 | le16_to_cpu(xb->xb_suballoc_slot)); | |
2487 | if (!xb_alloc_inode) { | |
2488 | ret = -ENOMEM; | |
2489 | mlog_errno(ret); | |
2490 | goto out; | |
2491 | } | |
2492 | mutex_lock(&xb_alloc_inode->i_mutex); | |
2493 | ||
2494 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
2495 | if (ret < 0) { | |
2496 | mlog_errno(ret); | |
2497 | goto out_mutex; | |
2498 | } | |
2499 | ||
2500 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
2501 | if (IS_ERR(handle)) { | |
2502 | ret = PTR_ERR(handle); | |
2503 | mlog_errno(ret); | |
2504 | goto out_unlock; | |
2505 | } | |
2506 | ||
2507 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
2508 | bit, bg_blkno, 1); | |
2509 | if (ret < 0) | |
2510 | mlog_errno(ret); | |
2511 | ||
2512 | ocfs2_commit_trans(osb, handle); | |
2513 | out_unlock: | |
2514 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
2515 | brelse(xb_alloc_bh); | |
2516 | out_mutex: | |
2517 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
2518 | iput(xb_alloc_inode); | |
2519 | out: | |
2520 | brelse(blk_bh); | |
2521 | return ret; | |
2522 | } | |
2523 | ||
cf1d6c76 TY |
2524 | /* |
2525 | * ocfs2_xattr_remove() | |
2526 | * | |
2527 | * Free extended attribute resources associated with this inode. | |
2528 | */ | |
2529 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2530 | { | |
cf1d6c76 TY |
2531 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2532 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2533 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2534 | struct buffer_head *ref_root_bh = NULL; | |
2535 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2536 | handle_t *handle; |
2537 | int ret; | |
2538 | ||
8154da3d TY |
2539 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2540 | return 0; | |
2541 | ||
cf1d6c76 TY |
2542 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2543 | return 0; | |
2544 | ||
ce9c5a54 TM |
2545 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
2546 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), | |
2547 | le64_to_cpu(di->i_refcount_loc), | |
2548 | 1, &ref_tree, &ref_root_bh); | |
2549 | if (ret) { | |
2550 | mlog_errno(ret); | |
2551 | goto out; | |
2552 | } | |
2553 | ref_ci = &ref_tree->rf_ci; | |
2554 | ||
2555 | } | |
2556 | ||
cf1d6c76 | 2557 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2558 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2559 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2560 | if (ret < 0) { |
2561 | mlog_errno(ret); | |
2562 | goto out; | |
2563 | } | |
2564 | } | |
cf1d6c76 | 2565 | |
08413899 TM |
2566 | if (di->i_xattr_loc) { |
2567 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2568 | le64_to_cpu(di->i_xattr_loc), |
2569 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2570 | if (ret < 0) { |
2571 | mlog_errno(ret); | |
2572 | goto out; | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2577 | OCFS2_INODE_UPDATE_CREDITS); | |
2578 | if (IS_ERR(handle)) { | |
2579 | ret = PTR_ERR(handle); | |
2580 | mlog_errno(ret); | |
2581 | goto out; | |
2582 | } | |
0cf2f763 | 2583 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2584 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2585 | if (ret) { |
2586 | mlog_errno(ret); | |
2587 | goto out_commit; | |
2588 | } | |
2589 | ||
08413899 | 2590 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2591 | |
2592 | spin_lock(&oi->ip_lock); | |
2593 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2594 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2595 | spin_unlock(&oi->ip_lock); | |
2596 | ||
2597 | ret = ocfs2_journal_dirty(handle, di_bh); | |
2598 | if (ret < 0) | |
2599 | mlog_errno(ret); | |
2600 | out_commit: | |
2601 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2602 | out: | |
ce9c5a54 TM |
2603 | if (ref_tree) |
2604 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2605 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2606 | return ret; |
2607 | } | |
2608 | ||
2609 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2610 | struct ocfs2_dinode *di) | |
2611 | { | |
2612 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2613 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2614 | int free; | |
2615 | ||
2616 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2617 | return 0; | |
2618 | ||
2619 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2620 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2621 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2622 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2623 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2624 | le64_to_cpu(di->i_size); | |
2625 | } else { | |
2626 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2627 | free = (le16_to_cpu(el->l_count) - | |
2628 | le16_to_cpu(el->l_next_free_rec)) * | |
2629 | sizeof(struct ocfs2_extent_rec); | |
2630 | } | |
2631 | if (free >= xattrsize) | |
2632 | return 1; | |
2633 | ||
2634 | return 0; | |
2635 | } | |
2636 | ||
2637 | /* | |
2638 | * ocfs2_xattr_ibody_find() | |
2639 | * | |
2640 | * Find extended attribute in inode block and | |
2641 | * fill search info into struct ocfs2_xattr_search. | |
2642 | */ | |
2643 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2644 | int name_index, | |
2645 | const char *name, | |
2646 | struct ocfs2_xattr_search *xs) | |
2647 | { | |
2648 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2649 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2650 | int ret; | |
2651 | int has_space = 0; | |
2652 | ||
2653 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2654 | return 0; | |
2655 | ||
2656 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2657 | down_read(&oi->ip_alloc_sem); | |
2658 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2659 | up_read(&oi->ip_alloc_sem); | |
2660 | if (!has_space) | |
2661 | return 0; | |
2662 | } | |
2663 | ||
2664 | xs->xattr_bh = xs->inode_bh; | |
2665 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2666 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2667 | xs->header = (struct ocfs2_xattr_header *) | |
2668 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2669 | else | |
2670 | xs->header = (struct ocfs2_xattr_header *) | |
2671 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2672 | xs->base = (void *)xs->header; | |
2673 | xs->here = xs->header->xh_entries; | |
2674 | ||
2675 | /* Find the named attribute. */ | |
2676 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2677 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2678 | if (ret && ret != -ENODATA) | |
2679 | return ret; | |
2680 | xs->not_found = ret; | |
2681 | } | |
2682 | ||
2683 | return 0; | |
2684 | } | |
2685 | ||
139fface JB |
2686 | static int ocfs2_xattr_ibody_init(struct inode *inode, |
2687 | struct buffer_head *di_bh, | |
2688 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2689 | { | |
2690 | int ret; | |
2691 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2692 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2693 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2694 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
2695 | ||
2696 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2697 | ret = -ENOSPC; | |
2698 | goto out; | |
2699 | } | |
2700 | ||
2701 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh, | |
2702 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2703 | if (ret) { | |
2704 | mlog_errno(ret); | |
2705 | goto out; | |
2706 | } | |
2707 | ||
2708 | /* | |
2709 | * Adjust extent record count or inline data size | |
2710 | * to reserve space for extended attribute. | |
2711 | */ | |
2712 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2713 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2714 | le16_add_cpu(&idata->id_count, -xattrsize); | |
2715 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
2716 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2717 | le16_add_cpu(&el->l_count, -(xattrsize / | |
2718 | sizeof(struct ocfs2_extent_rec))); | |
2719 | } | |
2720 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
2721 | ||
2722 | spin_lock(&oi->ip_lock); | |
2723 | oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL; | |
2724 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2725 | spin_unlock(&oi->ip_lock); | |
2726 | ||
2727 | ret = ocfs2_journal_dirty(ctxt->handle, di_bh); | |
2728 | if (ret < 0) | |
2729 | mlog_errno(ret); | |
2730 | ||
2731 | out: | |
2732 | return ret; | |
2733 | } | |
2734 | ||
cf1d6c76 TY |
2735 | /* |
2736 | * ocfs2_xattr_ibody_set() | |
2737 | * | |
2738 | * Set, replace or remove an extended attribute into inode block. | |
2739 | * | |
2740 | */ | |
2741 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2742 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2743 | struct ocfs2_xattr_search *xs, |
2744 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 | 2745 | { |
139fface | 2746 | int ret; |
cf1d6c76 TY |
2747 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2748 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
139fface | 2749 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2750 | |
2751 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2752 | return -ENOSPC; | |
2753 | ||
2754 | down_write(&oi->ip_alloc_sem); | |
2755 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2756 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2757 | ret = -ENOSPC; | |
2758 | goto out; | |
2759 | } | |
2760 | } | |
2761 | ||
139fface JB |
2762 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
2763 | ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt); | |
2764 | if (ret) { | |
2765 | if (ret != -ENOSPC) | |
2766 | mlog_errno(ret); | |
2767 | goto out; | |
2768 | } | |
2769 | } | |
2770 | ||
2771 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, | |
2772 | xs->not_found ? NULL : xs->here); | |
2773 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
2774 | if (ret) { | |
2775 | if (ret != -ENOSPC) | |
2776 | mlog_errno(ret); | |
2777 | goto out; | |
2778 | } | |
2779 | xs->here = loc.xl_entry; | |
2780 | ||
cf1d6c76 TY |
2781 | out: |
2782 | up_write(&oi->ip_alloc_sem); | |
2783 | ||
2784 | return ret; | |
2785 | } | |
2786 | ||
2787 | /* | |
2788 | * ocfs2_xattr_block_find() | |
2789 | * | |
2790 | * Find extended attribute in external block and | |
2791 | * fill search info into struct ocfs2_xattr_search. | |
2792 | */ | |
2793 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2794 | int name_index, | |
2795 | const char *name, | |
2796 | struct ocfs2_xattr_search *xs) | |
2797 | { | |
2798 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2799 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2800 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2801 | int ret = 0; |
2802 | ||
2803 | if (!di->i_xattr_loc) | |
2804 | return ret; | |
2805 | ||
4ae1d69b JB |
2806 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2807 | &blk_bh); | |
cf1d6c76 TY |
2808 | if (ret < 0) { |
2809 | mlog_errno(ret); | |
2810 | return ret; | |
2811 | } | |
f6087fb7 | 2812 | |
cf1d6c76 | 2813 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2814 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2815 | |
2816 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2817 | xs->header = &xb->xb_attrs.xb_header; | |
2818 | xs->base = (void *)xs->header; | |
2819 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2820 | xs->here = xs->header->xh_entries; | |
2821 | ||
2822 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2823 | } else | |
2824 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2825 | name_index, | |
2826 | name, xs); | |
cf1d6c76 | 2827 | |
cf1d6c76 TY |
2828 | if (ret && ret != -ENODATA) { |
2829 | xs->xattr_bh = NULL; | |
2830 | goto cleanup; | |
2831 | } | |
2832 | xs->not_found = ret; | |
2833 | return 0; | |
cf1d6c76 TY |
2834 | cleanup: |
2835 | brelse(blk_bh); | |
2836 | ||
2837 | return ret; | |
2838 | } | |
2839 | ||
d3981544 | 2840 | static int ocfs2_create_xattr_block(struct inode *inode, |
5aea1f0e | 2841 | struct buffer_head *inode_bh, |
d3981544 JB |
2842 | struct ocfs2_xattr_set_ctxt *ctxt, |
2843 | int indexed, | |
2844 | struct buffer_head **ret_bh) | |
5aea1f0e TM |
2845 | { |
2846 | int ret; | |
2847 | u16 suballoc_bit_start; | |
2848 | u32 num_got; | |
2849 | u64 first_blkno; | |
2850 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; | |
2851 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2852 | struct buffer_head *new_bh = NULL; | |
2853 | struct ocfs2_xattr_block *xblk; | |
2854 | ||
d3981544 JB |
2855 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
2856 | inode_bh, OCFS2_JOURNAL_ACCESS_CREATE); | |
5aea1f0e TM |
2857 | if (ret < 0) { |
2858 | mlog_errno(ret); | |
2859 | goto end; | |
2860 | } | |
2861 | ||
d3981544 | 2862 | ret = ocfs2_claim_metadata(osb, ctxt->handle, ctxt->meta_ac, 1, |
5aea1f0e TM |
2863 | &suballoc_bit_start, &num_got, |
2864 | &first_blkno); | |
2865 | if (ret < 0) { | |
2866 | mlog_errno(ret); | |
2867 | goto end; | |
2868 | } | |
2869 | ||
2870 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2871 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); | |
2872 | ||
d3981544 | 2873 | ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode), |
5aea1f0e TM |
2874 | new_bh, |
2875 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2876 | if (ret < 0) { | |
2877 | mlog_errno(ret); | |
2878 | goto end; | |
2879 | } | |
2880 | ||
2881 | /* Initialize ocfs2_xattr_block */ | |
2882 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2883 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2884 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
d3981544 | 2885 | xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot); |
5aea1f0e TM |
2886 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
2887 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2888 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
a7fe7a3a TM |
2889 | if (indexed) { |
2890 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2891 | xr->xt_clusters = cpu_to_le32(1); | |
2892 | xr->xt_last_eb_blk = 0; | |
2893 | xr->xt_list.l_tree_depth = 0; | |
2894 | xr->xt_list.l_count = cpu_to_le16( | |
2895 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2896 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2897 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2898 | } | |
d3981544 | 2899 | ocfs2_journal_dirty(ctxt->handle, new_bh); |
a7fe7a3a | 2900 | |
d3981544 | 2901 | /* Add it to the inode */ |
5aea1f0e | 2902 | di->i_xattr_loc = cpu_to_le64(first_blkno); |
d3981544 JB |
2903 | |
2904 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2905 | OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
2906 | di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); | |
2907 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2908 | ||
2909 | ocfs2_journal_dirty(ctxt->handle, inode_bh); | |
5aea1f0e TM |
2910 | |
2911 | *ret_bh = new_bh; | |
2912 | new_bh = NULL; | |
2913 | ||
2914 | end: | |
2915 | brelse(new_bh); | |
2916 | return ret; | |
2917 | } | |
2918 | ||
cf1d6c76 TY |
2919 | /* |
2920 | * ocfs2_xattr_block_set() | |
2921 | * | |
2922 | * Set, replace or remove an extended attribute into external block. | |
2923 | * | |
2924 | */ | |
2925 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2926 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2927 | struct ocfs2_xattr_search *xs, |
2928 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2929 | { |
2930 | struct buffer_head *new_bh = NULL; | |
cf1d6c76 | 2931 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 | 2932 | int ret; |
d3981544 | 2933 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2934 | |
2935 | if (!xs->xattr_bh) { | |
d3981544 JB |
2936 | ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt, |
2937 | 0, &new_bh); | |
5aea1f0e | 2938 | if (ret) { |
cf1d6c76 | 2939 | mlog_errno(ret); |
85db90e7 | 2940 | goto end; |
cf1d6c76 TY |
2941 | } |
2942 | ||
cf1d6c76 | 2943 | xs->xattr_bh = new_bh; |
5aea1f0e | 2944 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2945 | xs->header = &xblk->xb_attrs.xb_header; |
2946 | xs->base = (void *)xs->header; | |
2947 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2948 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2949 | } else |
2950 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2951 | ||
2952 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
d3981544 JB |
2953 | ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh, |
2954 | xs->not_found ? NULL : xs->here); | |
01225596 | 2955 | |
d3981544 JB |
2956 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
2957 | if (!ret) | |
2958 | xs->here = loc.xl_entry; | |
2959 | else if (ret != -ENOSPC) | |
01225596 | 2960 | goto end; |
d3981544 JB |
2961 | else { |
2962 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); | |
2963 | if (ret) | |
2964 | goto end; | |
2965 | } | |
cf1d6c76 TY |
2966 | } |
2967 | ||
d3981544 JB |
2968 | if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED) |
2969 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); | |
01225596 TM |
2970 | |
2971 | end: | |
cf1d6c76 TY |
2972 | return ret; |
2973 | } | |
2974 | ||
78f30c31 TM |
2975 | /* Check whether the new xattr can be inserted into the inode. */ |
2976 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2977 | struct ocfs2_xattr_info *xi, | |
2978 | struct ocfs2_xattr_search *xs) | |
2979 | { | |
78f30c31 TM |
2980 | struct ocfs2_xattr_entry *last; |
2981 | int free, i; | |
2982 | size_t min_offs = xs->end - xs->base; | |
2983 | ||
2984 | if (!xs->header) | |
2985 | return 0; | |
2986 | ||
2987 | last = xs->header->xh_entries; | |
2988 | ||
2989 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2990 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2991 | if (offs < min_offs) | |
2992 | min_offs = offs; | |
2993 | last += 1; | |
2994 | } | |
2995 | ||
4442f518 | 2996 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2997 | if (free < 0) |
2998 | return 0; | |
2999 | ||
3000 | BUG_ON(!xs->not_found); | |
3001 | ||
199799a3 | 3002 | if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi))) |
78f30c31 TM |
3003 | return 1; |
3004 | ||
3005 | return 0; | |
3006 | } | |
3007 | ||
3008 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
3009 | struct ocfs2_dinode *di, | |
3010 | struct ocfs2_xattr_info *xi, | |
3011 | struct ocfs2_xattr_search *xis, | |
3012 | struct ocfs2_xattr_search *xbs, | |
3013 | int *clusters_need, | |
85db90e7 TM |
3014 | int *meta_need, |
3015 | int *credits_need) | |
78f30c31 TM |
3016 | { |
3017 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 3018 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
3019 | struct buffer_head *bh = NULL; |
3020 | struct ocfs2_xattr_block *xb = NULL; | |
3021 | struct ocfs2_xattr_entry *xe = NULL; | |
3022 | struct ocfs2_xattr_value_root *xv = NULL; | |
3023 | char *base = NULL; | |
3024 | int name_offset, name_len = 0; | |
3025 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
6b240ff6 | 3026 | xi->xi_value_len); |
78f30c31 TM |
3027 | u64 value_size; |
3028 | ||
71d548a6 TM |
3029 | /* |
3030 | * Calculate the clusters we need to write. | |
3031 | * No matter whether we replace an old one or add a new one, | |
3032 | * we need this for writing. | |
3033 | */ | |
6b240ff6 | 3034 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
71d548a6 TM |
3035 | credits += new_clusters * |
3036 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3037 | ||
78f30c31 | 3038 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
3039 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3040 | ||
6b240ff6 | 3041 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 | 3042 | clusters_add += new_clusters; |
85db90e7 TM |
3043 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
3044 | &def_xv.xv.xr_list, | |
3045 | new_clusters); | |
3046 | } | |
78f30c31 TM |
3047 | |
3048 | goto meta_guess; | |
3049 | } | |
3050 | ||
3051 | if (!xis->not_found) { | |
3052 | xe = xis->here; | |
3053 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3054 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3055 | base = xis->base; | |
85db90e7 | 3056 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 3057 | } else { |
970e4936 | 3058 | int i, block_off = 0; |
78f30c31 TM |
3059 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
3060 | xe = xbs->here; | |
3061 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3062 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3063 | i = xbs->here - xbs->header->xh_entries; | |
3064 | old_in_xb = 1; | |
3065 | ||
3066 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 3067 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
3068 | bucket_xh(xbs->bucket), |
3069 | i, &block_off, | |
3070 | &name_offset); | |
3071 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
3072 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3073 | } else { | |
78f30c31 | 3074 | base = xbs->base; |
85db90e7 TM |
3075 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
3076 | } | |
3077 | } | |
3078 | ||
3079 | /* | |
3080 | * delete a xattr doesn't need metadata and cluster allocation. | |
3081 | * so just calculate the credits and return. | |
3082 | * | |
3083 | * The credits for removing the value tree will be extended | |
3084 | * by ocfs2_remove_extent itself. | |
3085 | */ | |
6b240ff6 | 3086 | if (!xi->xi_value) { |
85db90e7 | 3087 | if (!ocfs2_xattr_is_local(xe)) |
a90714c1 | 3088 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
3089 | |
3090 | goto out; | |
78f30c31 TM |
3091 | } |
3092 | ||
3093 | /* do cluster allocation guess first. */ | |
3094 | value_size = le64_to_cpu(xe->xe_value_size); | |
3095 | ||
3096 | if (old_in_xb) { | |
3097 | /* | |
3098 | * In xattr set, we always try to set the xe in inode first, | |
3099 | * so if it can be inserted into inode successfully, the old | |
3100 | * one will be removed from the xattr block, and this xattr | |
3101 | * will be inserted into inode as a new xattr in inode. | |
3102 | */ | |
3103 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
3104 | clusters_add += new_clusters; | |
a90714c1 | 3105 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
3106 | OCFS2_INODE_UPDATE_CREDITS; |
3107 | if (!ocfs2_xattr_is_local(xe)) | |
3108 | credits += ocfs2_calc_extend_credits( | |
3109 | inode->i_sb, | |
3110 | &def_xv.xv.xr_list, | |
3111 | new_clusters); | |
78f30c31 TM |
3112 | goto out; |
3113 | } | |
3114 | } | |
3115 | ||
6b240ff6 | 3116 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 TM |
3117 | /* the new values will be stored outside. */ |
3118 | u32 old_clusters = 0; | |
3119 | ||
3120 | if (!ocfs2_xattr_is_local(xe)) { | |
3121 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
3122 | value_size); | |
3123 | xv = (struct ocfs2_xattr_value_root *) | |
3124 | (base + name_offset + name_len); | |
97aff52a | 3125 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
3126 | } else |
3127 | xv = &def_xv.xv; | |
3128 | ||
85db90e7 | 3129 | if (old_clusters >= new_clusters) { |
a90714c1 | 3130 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 3131 | goto out; |
85db90e7 | 3132 | } else { |
78f30c31 TM |
3133 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
3134 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
3135 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
3136 | &xv->xr_list, | |
3137 | new_clusters - | |
3138 | old_clusters); | |
97aff52a TM |
3139 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
3140 | goto out; | |
78f30c31 TM |
3141 | } |
3142 | } else { | |
3143 | /* | |
3144 | * Now the new value will be stored inside. So if the new | |
3145 | * value is smaller than the size of value root or the old | |
3146 | * value, we don't need any allocation, otherwise we have | |
3147 | * to guess metadata allocation. | |
3148 | */ | |
6b240ff6 JB |
3149 | if ((ocfs2_xattr_is_local(xe) && |
3150 | (value_size >= xi->xi_value_len)) || | |
78f30c31 | 3151 | (!ocfs2_xattr_is_local(xe) && |
6b240ff6 | 3152 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
78f30c31 TM |
3153 | goto out; |
3154 | } | |
3155 | ||
3156 | meta_guess: | |
3157 | /* calculate metadata allocation. */ | |
3158 | if (di->i_xattr_loc) { | |
3159 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
3160 | ret = ocfs2_read_xattr_block(inode, |
3161 | le64_to_cpu(di->i_xattr_loc), | |
3162 | &bh); | |
78f30c31 TM |
3163 | if (ret) { |
3164 | mlog_errno(ret); | |
3165 | goto out; | |
3166 | } | |
3167 | ||
3168 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
3169 | } else | |
3170 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
3171 | ||
90cb546c TM |
3172 | /* |
3173 | * If there is already an xattr tree, good, we can calculate | |
3174 | * like other b-trees. Otherwise we may have the chance of | |
3175 | * create a tree, the credit calculation is borrowed from | |
3176 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
3177 | * new tree will be cluster based, so no meta is needed. | |
3178 | */ | |
78f30c31 TM |
3179 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
3180 | struct ocfs2_extent_list *el = | |
3181 | &xb->xb_attrs.xb_root.xt_list; | |
3182 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
3183 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
3184 | el, 1); | |
90cb546c TM |
3185 | } else |
3186 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
3187 | |
3188 | /* | |
3189 | * This cluster will be used either for new bucket or for | |
3190 | * new xattr block. | |
3191 | * If the cluster size is the same as the bucket size, one | |
3192 | * more is needed since we may need to extend the bucket | |
3193 | * also. | |
3194 | */ | |
3195 | clusters_add += 1; | |
85db90e7 | 3196 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 3197 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
3198 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
3199 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 3200 | clusters_add += 1; |
85db90e7 TM |
3201 | } |
3202 | } else { | |
78f30c31 | 3203 | meta_add += 1; |
85db90e7 TM |
3204 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
3205 | } | |
78f30c31 TM |
3206 | out: |
3207 | if (clusters_need) | |
3208 | *clusters_need = clusters_add; | |
3209 | if (meta_need) | |
3210 | *meta_need = meta_add; | |
85db90e7 TM |
3211 | if (credits_need) |
3212 | *credits_need = credits; | |
78f30c31 TM |
3213 | brelse(bh); |
3214 | return ret; | |
3215 | } | |
3216 | ||
3217 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
3218 | struct ocfs2_dinode *di, | |
3219 | struct ocfs2_xattr_info *xi, | |
3220 | struct ocfs2_xattr_search *xis, | |
3221 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 3222 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 3223 | int extra_meta, |
85db90e7 | 3224 | int *credits) |
78f30c31 TM |
3225 | { |
3226 | int clusters_add, meta_add, ret; | |
3227 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3228 | ||
3229 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
3230 | ||
3231 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
3232 | ||
3233 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 3234 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
3235 | if (ret) { |
3236 | mlog_errno(ret); | |
3237 | return ret; | |
3238 | } | |
3239 | ||
492a8a33 | 3240 | meta_add += extra_meta; |
85db90e7 | 3241 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
6b240ff6 | 3242 | "credits = %d\n", xi->xi_name, meta_add, clusters_add, *credits); |
78f30c31 TM |
3243 | |
3244 | if (meta_add) { | |
3245 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
3246 | &ctxt->meta_ac); | |
3247 | if (ret) { | |
3248 | mlog_errno(ret); | |
3249 | goto out; | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | if (clusters_add) { | |
3254 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
3255 | if (ret) | |
3256 | mlog_errno(ret); | |
3257 | } | |
3258 | out: | |
3259 | if (ret) { | |
3260 | if (ctxt->meta_ac) { | |
3261 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
3262 | ctxt->meta_ac = NULL; | |
3263 | } | |
3264 | ||
3265 | /* | |
3266 | * We cannot have an error and a non null ctxt->data_ac. | |
3267 | */ | |
3268 | } | |
3269 | ||
3270 | return ret; | |
3271 | } | |
3272 | ||
85db90e7 TM |
3273 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
3274 | struct ocfs2_dinode *di, | |
3275 | struct ocfs2_xattr_info *xi, | |
3276 | struct ocfs2_xattr_search *xis, | |
3277 | struct ocfs2_xattr_search *xbs, | |
3278 | struct ocfs2_xattr_set_ctxt *ctxt) | |
3279 | { | |
9f868f16 | 3280 | int ret = 0, credits, old_found; |
85db90e7 | 3281 | |
6b240ff6 | 3282 | if (!xi->xi_value) { |
85db90e7 TM |
3283 | /* Remove existing extended attribute */ |
3284 | if (!xis->not_found) | |
3285 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3286 | else if (!xbs->not_found) | |
3287 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3288 | } else { | |
3289 | /* We always try to set extended attribute into inode first*/ | |
3290 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3291 | if (!ret && !xbs->not_found) { | |
3292 | /* | |
3293 | * If succeed and that extended attribute existing in | |
3294 | * external block, then we will remove it. | |
3295 | */ | |
6b240ff6 JB |
3296 | xi->xi_value = NULL; |
3297 | xi->xi_value_len = 0; | |
85db90e7 | 3298 | |
9f868f16 | 3299 | old_found = xis->not_found; |
85db90e7 TM |
3300 | xis->not_found = -ENODATA; |
3301 | ret = ocfs2_calc_xattr_set_need(inode, | |
3302 | di, | |
3303 | xi, | |
3304 | xis, | |
3305 | xbs, | |
3306 | NULL, | |
3307 | NULL, | |
3308 | &credits); | |
9f868f16 | 3309 | xis->not_found = old_found; |
85db90e7 TM |
3310 | if (ret) { |
3311 | mlog_errno(ret); | |
3312 | goto out; | |
3313 | } | |
3314 | ||
3315 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
3316 | ctxt->handle->h_buffer_credits); | |
3317 | if (ret) { | |
3318 | mlog_errno(ret); | |
3319 | goto out; | |
3320 | } | |
3321 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3322 | } else if (ret == -ENOSPC) { | |
3323 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
3324 | ret = ocfs2_xattr_block_find(inode, | |
6b240ff6 JB |
3325 | xi->xi_name_index, |
3326 | xi->xi_name, xbs); | |
85db90e7 TM |
3327 | if (ret) |
3328 | goto out; | |
3329 | ||
9f868f16 | 3330 | old_found = xis->not_found; |
85db90e7 TM |
3331 | xis->not_found = -ENODATA; |
3332 | ret = ocfs2_calc_xattr_set_need(inode, | |
3333 | di, | |
3334 | xi, | |
3335 | xis, | |
3336 | xbs, | |
3337 | NULL, | |
3338 | NULL, | |
3339 | &credits); | |
9f868f16 | 3340 | xis->not_found = old_found; |
85db90e7 TM |
3341 | if (ret) { |
3342 | mlog_errno(ret); | |
3343 | goto out; | |
3344 | } | |
3345 | ||
3346 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
3347 | ctxt->handle->h_buffer_credits); | |
3348 | if (ret) { | |
3349 | mlog_errno(ret); | |
3350 | goto out; | |
3351 | } | |
3352 | } | |
3353 | /* | |
3354 | * If no space in inode, we will set extended attribute | |
3355 | * into external block. | |
3356 | */ | |
3357 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3358 | if (ret) | |
3359 | goto out; | |
3360 | if (!xis->not_found) { | |
3361 | /* | |
3362 | * If succeed and that extended attribute | |
3363 | * existing in inode, we will remove it. | |
3364 | */ | |
6b240ff6 JB |
3365 | xi->xi_value = NULL; |
3366 | xi->xi_value_len = 0; | |
85db90e7 TM |
3367 | xbs->not_found = -ENODATA; |
3368 | ret = ocfs2_calc_xattr_set_need(inode, | |
3369 | di, | |
3370 | xi, | |
3371 | xis, | |
3372 | xbs, | |
3373 | NULL, | |
3374 | NULL, | |
3375 | &credits); | |
3376 | if (ret) { | |
3377 | mlog_errno(ret); | |
3378 | goto out; | |
3379 | } | |
3380 | ||
3381 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
3382 | ctxt->handle->h_buffer_credits); | |
3383 | if (ret) { | |
3384 | mlog_errno(ret); | |
3385 | goto out; | |
3386 | } | |
3387 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
3388 | xis, ctxt); | |
3389 | } | |
3390 | } | |
3391 | } | |
3392 | ||
4b3f6209 TM |
3393 | if (!ret) { |
3394 | /* Update inode ctime. */ | |
0cf2f763 | 3395 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
3396 | xis->inode_bh, |
3397 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
3398 | if (ret) { |
3399 | mlog_errno(ret); | |
3400 | goto out; | |
3401 | } | |
3402 | ||
3403 | inode->i_ctime = CURRENT_TIME; | |
3404 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
3405 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
3406 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
3407 | } | |
85db90e7 TM |
3408 | out: |
3409 | return ret; | |
3410 | } | |
3411 | ||
6c3faba4 TY |
3412 | /* |
3413 | * This function only called duing creating inode | |
3414 | * for init security/acl xattrs of the new inode. | |
008aafaf | 3415 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
3416 | */ |
3417 | int ocfs2_xattr_set_handle(handle_t *handle, | |
3418 | struct inode *inode, | |
3419 | struct buffer_head *di_bh, | |
3420 | int name_index, | |
3421 | const char *name, | |
3422 | const void *value, | |
3423 | size_t value_len, | |
3424 | int flags, | |
3425 | struct ocfs2_alloc_context *meta_ac, | |
3426 | struct ocfs2_alloc_context *data_ac) | |
3427 | { | |
3428 | struct ocfs2_dinode *di; | |
3429 | int ret; | |
3430 | ||
3431 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3432 | .xi_name_index = name_index, |
3433 | .xi_name = name, | |
18853b95 | 3434 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3435 | .xi_value = value, |
3436 | .xi_value_len = value_len, | |
6c3faba4 TY |
3437 | }; |
3438 | ||
3439 | struct ocfs2_xattr_search xis = { | |
3440 | .not_found = -ENODATA, | |
3441 | }; | |
3442 | ||
3443 | struct ocfs2_xattr_search xbs = { | |
3444 | .not_found = -ENODATA, | |
3445 | }; | |
3446 | ||
3447 | struct ocfs2_xattr_set_ctxt ctxt = { | |
3448 | .handle = handle, | |
3449 | .meta_ac = meta_ac, | |
3450 | .data_ac = data_ac, | |
3451 | }; | |
3452 | ||
3453 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
3454 | return -EOPNOTSUPP; | |
3455 | ||
008aafaf TY |
3456 | /* |
3457 | * In extreme situation, may need xattr bucket when | |
3458 | * block size is too small. And we have already reserved | |
3459 | * the credits for bucket in mknod. | |
3460 | */ | |
3461 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
3462 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3463 | if (!xbs.bucket) { | |
3464 | mlog_errno(-ENOMEM); | |
3465 | return -ENOMEM; | |
3466 | } | |
3467 | } | |
3468 | ||
6c3faba4 TY |
3469 | xis.inode_bh = xbs.inode_bh = di_bh; |
3470 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3471 | ||
3472 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3473 | ||
3474 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3475 | if (ret) | |
3476 | goto cleanup; | |
3477 | if (xis.not_found) { | |
3478 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3479 | if (ret) | |
3480 | goto cleanup; | |
3481 | } | |
3482 | ||
3483 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3484 | ||
3485 | cleanup: | |
3486 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3487 | brelse(xbs.xattr_bh); | |
008aafaf | 3488 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
3489 | |
3490 | return ret; | |
3491 | } | |
3492 | ||
cf1d6c76 TY |
3493 | /* |
3494 | * ocfs2_xattr_set() | |
3495 | * | |
3496 | * Set, replace or remove an extended attribute for this inode. | |
3497 | * value is NULL to remove an existing extended attribute, else either | |
3498 | * create or replace an extended attribute. | |
3499 | */ | |
3500 | int ocfs2_xattr_set(struct inode *inode, | |
3501 | int name_index, | |
3502 | const char *name, | |
3503 | const void *value, | |
3504 | size_t value_len, | |
3505 | int flags) | |
3506 | { | |
3507 | struct buffer_head *di_bh = NULL; | |
3508 | struct ocfs2_dinode *di; | |
492a8a33 | 3509 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 3510 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 3511 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 3512 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
492a8a33 | 3513 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
3514 | |
3515 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3516 | .xi_name_index = name_index, |
3517 | .xi_name = name, | |
18853b95 | 3518 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3519 | .xi_value = value, |
3520 | .xi_value_len = value_len, | |
cf1d6c76 TY |
3521 | }; |
3522 | ||
3523 | struct ocfs2_xattr_search xis = { | |
3524 | .not_found = -ENODATA, | |
3525 | }; | |
3526 | ||
3527 | struct ocfs2_xattr_search xbs = { | |
3528 | .not_found = -ENODATA, | |
3529 | }; | |
3530 | ||
8154da3d TY |
3531 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
3532 | return -EOPNOTSUPP; | |
3533 | ||
ba937127 JB |
3534 | /* |
3535 | * Only xbs will be used on indexed trees. xis doesn't need a | |
3536 | * bucket. | |
3537 | */ | |
3538 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3539 | if (!xbs.bucket) { | |
3540 | mlog_errno(-ENOMEM); | |
3541 | return -ENOMEM; | |
3542 | } | |
3543 | ||
cf1d6c76 TY |
3544 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
3545 | if (ret < 0) { | |
3546 | mlog_errno(ret); | |
ba937127 | 3547 | goto cleanup_nolock; |
cf1d6c76 TY |
3548 | } |
3549 | xis.inode_bh = xbs.inode_bh = di_bh; | |
3550 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3551 | ||
3552 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3553 | /* | |
3554 | * Scan inode and external block to find the same name | |
3555 | * extended attribute and collect search infomation. | |
3556 | */ | |
3557 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3558 | if (ret) | |
3559 | goto cleanup; | |
3560 | if (xis.not_found) { | |
3561 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3562 | if (ret) | |
3563 | goto cleanup; | |
3564 | } | |
3565 | ||
3566 | if (xis.not_found && xbs.not_found) { | |
3567 | ret = -ENODATA; | |
3568 | if (flags & XATTR_REPLACE) | |
3569 | goto cleanup; | |
3570 | ret = 0; | |
3571 | if (!value) | |
3572 | goto cleanup; | |
3573 | } else { | |
3574 | ret = -EEXIST; | |
3575 | if (flags & XATTR_CREATE) | |
3576 | goto cleanup; | |
3577 | } | |
3578 | ||
492a8a33 TM |
3579 | /* Check whether the value is refcounted and do some prepartion. */ |
3580 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && | |
3581 | (!xis.not_found || !xbs.not_found)) { | |
3582 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
3583 | &xis, &xbs, &ref_tree, | |
3584 | &ref_meta, &ref_credits); | |
3585 | if (ret) { | |
3586 | mlog_errno(ret); | |
3587 | goto cleanup; | |
3588 | } | |
3589 | } | |
85db90e7 TM |
3590 | |
3591 | mutex_lock(&tl_inode->i_mutex); | |
3592 | ||
3593 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
3594 | ret = __ocfs2_flush_truncate_log(osb); | |
3595 | if (ret < 0) { | |
3596 | mutex_unlock(&tl_inode->i_mutex); | |
3597 | mlog_errno(ret); | |
3598 | goto cleanup; | |
3599 | } | |
3600 | } | |
3601 | mutex_unlock(&tl_inode->i_mutex); | |
3602 | ||
3603 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3604 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3605 | if (ret) { |
3606 | mlog_errno(ret); | |
3607 | goto cleanup; | |
3608 | } | |
3609 | ||
4b3f6209 TM |
3610 | /* we need to update inode's ctime field, so add credit for it. */ |
3611 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3612 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3613 | if (IS_ERR(ctxt.handle)) { |
3614 | ret = PTR_ERR(ctxt.handle); | |
3615 | mlog_errno(ret); | |
3616 | goto cleanup; | |
cf1d6c76 | 3617 | } |
85db90e7 TM |
3618 | |
3619 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3620 | ||
3621 | ocfs2_commit_trans(osb, ctxt.handle); | |
3622 | ||
78f30c31 TM |
3623 | if (ctxt.data_ac) |
3624 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3625 | if (ctxt.meta_ac) | |
3626 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3627 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3628 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3629 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3630 | |
cf1d6c76 | 3631 | cleanup: |
492a8a33 TM |
3632 | if (ref_tree) |
3633 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3634 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3635 | if (!value && !ret) { |
3636 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3637 | if (ret) | |
3638 | mlog_errno(ret); | |
3639 | } | |
cf1d6c76 | 3640 | ocfs2_inode_unlock(inode, 1); |
ba937127 | 3641 | cleanup_nolock: |
cf1d6c76 TY |
3642 | brelse(di_bh); |
3643 | brelse(xbs.xattr_bh); | |
ba937127 | 3644 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3645 | |
3646 | return ret; | |
3647 | } | |
3648 | ||
0c044f0b TM |
3649 | /* |
3650 | * Find the xattr extent rec which may contains name_hash. | |
3651 | * e_cpos will be the first name hash of the xattr rec. | |
3652 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3653 | */ | |
3654 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3655 | u32 name_hash, | |
3656 | u64 *p_blkno, | |
3657 | u32 *e_cpos, | |
3658 | u32 *num_clusters, | |
3659 | struct ocfs2_extent_list *el) | |
3660 | { | |
3661 | int ret = 0, i; | |
3662 | struct buffer_head *eb_bh = NULL; | |
3663 | struct ocfs2_extent_block *eb; | |
3664 | struct ocfs2_extent_rec *rec = NULL; | |
3665 | u64 e_blkno = 0; | |
3666 | ||
3667 | if (el->l_tree_depth) { | |
facdb77f JB |
3668 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3669 | &eb_bh); | |
0c044f0b TM |
3670 | if (ret) { |
3671 | mlog_errno(ret); | |
3672 | goto out; | |
3673 | } | |
3674 | ||
3675 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3676 | el = &eb->h_list; | |
3677 | ||
3678 | if (el->l_tree_depth) { | |
3679 | ocfs2_error(inode->i_sb, | |
3680 | "Inode %lu has non zero tree depth in " | |
3681 | "xattr tree block %llu\n", inode->i_ino, | |
3682 | (unsigned long long)eb_bh->b_blocknr); | |
3683 | ret = -EROFS; | |
3684 | goto out; | |
3685 | } | |
3686 | } | |
3687 | ||
3688 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3689 | rec = &el->l_recs[i]; | |
3690 | ||
3691 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3692 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3693 | break; | |
3694 | } | |
3695 | } | |
3696 | ||
3697 | if (!e_blkno) { | |
3698 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
3699 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
3700 | le32_to_cpu(rec->e_cpos), | |
3701 | ocfs2_rec_clusters(el, rec)); | |
3702 | ret = -EROFS; | |
3703 | goto out; | |
3704 | } | |
3705 | ||
3706 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3707 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3708 | if (e_cpos) | |
3709 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3710 | out: | |
3711 | brelse(eb_bh); | |
3712 | return ret; | |
3713 | } | |
3714 | ||
3715 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3716 | struct ocfs2_xattr_bucket *bucket, | |
3717 | void *para); | |
3718 | ||
589dc260 | 3719 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3720 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3721 | int name_index, |
3722 | const char *name, | |
3723 | u32 name_hash, | |
3724 | u16 *xe_index, | |
3725 | int *found) | |
3726 | { | |
3727 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3728 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3729 | size_t name_len = strlen(name); |
3730 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3731 | char *xe_name; |
3732 | ||
3733 | /* | |
3734 | * We don't use binary search in the bucket because there | |
3735 | * may be multiple entries with the same name hash. | |
3736 | */ | |
3737 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3738 | xe = &xh->xh_entries[i]; | |
3739 | ||
3740 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3741 | continue; | |
3742 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3743 | break; | |
3744 | ||
3745 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3746 | if (!cmp) | |
3747 | cmp = name_len - xe->xe_name_len; | |
3748 | if (cmp) | |
3749 | continue; | |
3750 | ||
fd68a894 | 3751 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3752 | xh, |
3753 | i, | |
3754 | &block_off, | |
3755 | &new_offset); | |
3756 | if (ret) { | |
3757 | mlog_errno(ret); | |
3758 | break; | |
3759 | } | |
3760 | ||
970e4936 | 3761 | |
e2356a3f JB |
3762 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3763 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3764 | *xe_index = i; |
3765 | *found = 1; | |
3766 | ret = 0; | |
3767 | break; | |
3768 | } | |
3769 | } | |
3770 | ||
3771 | return ret; | |
3772 | } | |
3773 | ||
3774 | /* | |
3775 | * Find the specified xattr entry in a series of buckets. | |
3776 | * This series start from p_blkno and last for num_clusters. | |
3777 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3778 | * the num of the valid buckets. | |
3779 | * | |
3780 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3781 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3782 | */ | |
3783 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3784 | int name_index, | |
3785 | const char *name, | |
3786 | u32 name_hash, | |
3787 | u64 p_blkno, | |
3788 | u32 first_hash, | |
3789 | u32 num_clusters, | |
3790 | struct ocfs2_xattr_search *xs) | |
3791 | { | |
3792 | int ret, found = 0; | |
589dc260 TM |
3793 | struct ocfs2_xattr_header *xh = NULL; |
3794 | struct ocfs2_xattr_entry *xe = NULL; | |
3795 | u16 index = 0; | |
3796 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3797 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3798 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3799 | u32 last_hash; |
e2356a3f | 3800 | u64 blkno, lower_blkno = 0; |
589dc260 | 3801 | |
e2356a3f JB |
3802 | search = ocfs2_xattr_bucket_new(inode); |
3803 | if (!search) { | |
3804 | ret = -ENOMEM; | |
3805 | mlog_errno(ret); | |
3806 | goto out; | |
3807 | } | |
3808 | ||
3809 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3810 | if (ret) { |
3811 | mlog_errno(ret); | |
3812 | goto out; | |
3813 | } | |
3814 | ||
e2356a3f | 3815 | xh = bucket_xh(search); |
589dc260 | 3816 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3817 | while (low_bucket <= high_bucket) { |
e2356a3f | 3818 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3819 | |
e2356a3f | 3820 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3821 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3822 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3823 | if (ret) { |
3824 | mlog_errno(ret); | |
3825 | goto out; | |
3826 | } | |
3827 | ||
e2356a3f | 3828 | xh = bucket_xh(search); |
589dc260 TM |
3829 | xe = &xh->xh_entries[0]; |
3830 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3831 | high_bucket = bucket - 1; | |
3832 | continue; | |
3833 | } | |
3834 | ||
3835 | /* | |
3836 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3837 | * bucket is larger than the search one. for an empty |
3838 | * bucket, the last one is also the first one. | |
589dc260 | 3839 | */ |
5a095611 TM |
3840 | if (xh->xh_count) |
3841 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3842 | ||
589dc260 TM |
3843 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3844 | ||
e2356a3f JB |
3845 | /* record lower_blkno which may be the insert place. */ |
3846 | lower_blkno = blkno; | |
589dc260 TM |
3847 | |
3848 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3849 | low_bucket = bucket + 1; | |
3850 | continue; | |
3851 | } | |
3852 | ||
3853 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3854 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3855 | name_index, name, name_hash, |
3856 | &index, &found); | |
3857 | if (ret) { | |
3858 | mlog_errno(ret); | |
3859 | goto out; | |
3860 | } | |
3861 | break; | |
3862 | } | |
3863 | ||
3864 | /* | |
3865 | * Record the bucket we have found. | |
3866 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3867 | * always set it to the previous bucket. | |
3868 | */ | |
e2356a3f JB |
3869 | if (!lower_blkno) |
3870 | lower_blkno = p_blkno; | |
3871 | ||
3872 | /* This should be in cache - we just read it during the search */ | |
3873 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3874 | if (ret) { | |
3875 | mlog_errno(ret); | |
3876 | goto out; | |
589dc260 | 3877 | } |
589dc260 | 3878 | |
ba937127 JB |
3879 | xs->header = bucket_xh(xs->bucket); |
3880 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3881 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3882 | ||
3883 | if (found) { | |
589dc260 TM |
3884 | xs->here = &xs->header->xh_entries[index]; |
3885 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3886 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3887 | } else |
3888 | ret = -ENODATA; | |
3889 | ||
3890 | out: | |
e2356a3f | 3891 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3892 | return ret; |
3893 | } | |
3894 | ||
3895 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3896 | struct buffer_head *root_bh, | |
3897 | int name_index, | |
3898 | const char *name, | |
3899 | struct ocfs2_xattr_search *xs) | |
3900 | { | |
3901 | int ret; | |
3902 | struct ocfs2_xattr_block *xb = | |
3903 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3904 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3905 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3906 | u64 p_blkno = 0; | |
3907 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3908 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3909 | |
3910 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3911 | return -ENODATA; | |
3912 | ||
3913 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3914 | name, name_hash, name_index); | |
3915 | ||
3916 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3917 | &num_clusters, el); | |
3918 | if (ret) { | |
3919 | mlog_errno(ret); | |
3920 | goto out; | |
3921 | } | |
3922 | ||
3923 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3924 | ||
3925 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3926 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3927 | first_hash); | |
589dc260 TM |
3928 | |
3929 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3930 | p_blkno, first_hash, num_clusters, xs); | |
3931 | ||
3932 | out: | |
3933 | return ret; | |
3934 | } | |
3935 | ||
0c044f0b TM |
3936 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3937 | u64 blkno, | |
3938 | u32 clusters, | |
3939 | xattr_bucket_func *func, | |
3940 | void *para) | |
3941 | { | |
6dde41d9 | 3942 | int i, ret = 0; |
0c044f0b TM |
3943 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3944 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3945 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3946 | |
ba937127 JB |
3947 | bucket = ocfs2_xattr_bucket_new(inode); |
3948 | if (!bucket) { | |
3949 | mlog_errno(-ENOMEM); | |
3950 | return -ENOMEM; | |
3951 | } | |
0c044f0b TM |
3952 | |
3953 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3954 | clusters, (unsigned long long)blkno); |
0c044f0b | 3955 | |
ba937127 JB |
3956 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3957 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3958 | if (ret) { |
3959 | mlog_errno(ret); | |
ba937127 | 3960 | break; |
0c044f0b TM |
3961 | } |
3962 | ||
0c044f0b TM |
3963 | /* |
3964 | * The real bucket num in this series of blocks is stored | |
3965 | * in the 1st bucket. | |
3966 | */ | |
3967 | if (i == 0) | |
ba937127 | 3968 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3969 | |
de29c085 MF |
3970 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3971 | (unsigned long long)blkno, | |
ba937127 | 3972 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3973 | if (func) { |
ba937127 | 3974 | ret = func(inode, bucket, para); |
a46fa684 | 3975 | if (ret && ret != -ERANGE) |
0c044f0b | 3976 | mlog_errno(ret); |
ba937127 | 3977 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3978 | } |
3979 | ||
ba937127 JB |
3980 | ocfs2_xattr_bucket_relse(bucket); |
3981 | if (ret) | |
3982 | break; | |
0c044f0b TM |
3983 | } |
3984 | ||
ba937127 | 3985 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3986 | return ret; |
3987 | } | |
3988 | ||
3989 | struct ocfs2_xattr_tree_list { | |
3990 | char *buffer; | |
3991 | size_t buffer_size; | |
936b8834 | 3992 | size_t result; |
0c044f0b TM |
3993 | }; |
3994 | ||
fd68a894 | 3995 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
3996 | struct ocfs2_xattr_header *xh, |
3997 | int index, | |
3998 | int *block_off, | |
3999 | int *new_offset) | |
4000 | { | |
4001 | u16 name_offset; | |
4002 | ||
4003 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
4004 | return -EINVAL; | |
4005 | ||
4006 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
4007 | ||
fd68a894 TM |
4008 | *block_off = name_offset >> sb->s_blocksize_bits; |
4009 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
4010 | |
4011 | return 0; | |
4012 | } | |
4013 | ||
4014 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
4015 | struct ocfs2_xattr_bucket *bucket, | |
4016 | void *para) | |
4017 | { | |
936b8834 | 4018 | int ret = 0, type; |
0c044f0b | 4019 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 4020 | int i, block_off, new_offset; |
936b8834 | 4021 | const char *prefix, *name; |
0c044f0b | 4022 | |
3e632946 JB |
4023 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
4024 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
4025 | type = ocfs2_xattr_get_type(entry); |
4026 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 4027 | |
936b8834 | 4028 | if (prefix) { |
fd68a894 | 4029 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 4030 | bucket_xh(bucket), |
0c044f0b TM |
4031 | i, |
4032 | &block_off, | |
4033 | &new_offset); | |
4034 | if (ret) | |
4035 | break; | |
936b8834 | 4036 | |
51def39f | 4037 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
4038 | new_offset; |
4039 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
4040 | xl->buffer_size, | |
4041 | &xl->result, | |
4042 | prefix, name, | |
4043 | entry->xe_name_len); | |
4044 | if (ret) | |
4045 | break; | |
0c044f0b TM |
4046 | } |
4047 | } | |
4048 | ||
4049 | return ret; | |
4050 | } | |
4051 | ||
47bca495 TM |
4052 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
4053 | struct buffer_head *blk_bh, | |
4054 | xattr_tree_rec_func *rec_func, | |
4055 | void *para) | |
0c044f0b | 4056 | { |
47bca495 TM |
4057 | struct ocfs2_xattr_block *xb = |
4058 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
4059 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
4060 | int ret = 0; |
4061 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
4062 | u64 p_blkno = 0; | |
0c044f0b | 4063 | |
47bca495 | 4064 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
4065 | return 0; |
4066 | ||
4067 | while (name_hash > 0) { | |
4068 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4069 | &e_cpos, &num_clusters, el); | |
4070 | if (ret) { | |
4071 | mlog_errno(ret); | |
47bca495 | 4072 | break; |
0c044f0b TM |
4073 | } |
4074 | ||
47bca495 TM |
4075 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
4076 | num_clusters, para); | |
0c044f0b | 4077 | if (ret) { |
a46fa684 TM |
4078 | if (ret != -ERANGE) |
4079 | mlog_errno(ret); | |
47bca495 | 4080 | break; |
0c044f0b TM |
4081 | } |
4082 | ||
4083 | if (e_cpos == 0) | |
4084 | break; | |
4085 | ||
4086 | name_hash = e_cpos - 1; | |
4087 | } | |
4088 | ||
47bca495 TM |
4089 | return ret; |
4090 | ||
4091 | } | |
4092 | ||
4093 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
4094 | struct buffer_head *root_bh, | |
4095 | u64 blkno, u32 cpos, u32 len, void *para) | |
4096 | { | |
4097 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
4098 | ocfs2_list_xattr_bucket, para); | |
4099 | } | |
4100 | ||
4101 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
4102 | struct buffer_head *blk_bh, | |
4103 | char *buffer, | |
4104 | size_t buffer_size) | |
4105 | { | |
4106 | int ret; | |
4107 | struct ocfs2_xattr_tree_list xl = { | |
4108 | .buffer = buffer, | |
4109 | .buffer_size = buffer_size, | |
4110 | .result = 0, | |
4111 | }; | |
4112 | ||
4113 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
4114 | ocfs2_list_xattr_tree_rec, &xl); | |
4115 | if (ret) { | |
4116 | mlog_errno(ret); | |
4117 | goto out; | |
4118 | } | |
4119 | ||
936b8834 | 4120 | ret = xl.result; |
0c044f0b TM |
4121 | out: |
4122 | return ret; | |
4123 | } | |
01225596 TM |
4124 | |
4125 | static int cmp_xe(const void *a, const void *b) | |
4126 | { | |
4127 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4128 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
4129 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
4130 | ||
4131 | if (l_hash > r_hash) | |
4132 | return 1; | |
4133 | if (l_hash < r_hash) | |
4134 | return -1; | |
4135 | return 0; | |
4136 | } | |
4137 | ||
4138 | static void swap_xe(void *a, void *b, int size) | |
4139 | { | |
4140 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
4141 | ||
4142 | tmp = *l; | |
4143 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
4144 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
4145 | } | |
4146 | ||
4147 | /* | |
4148 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
4149 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
4150 | * The header goes at the start of the bucket, and the names+values are |
4151 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
4152 | * Note: we need to sort the entries since they are not saved in order |
4153 | * in the ocfs2_xattr_block. | |
4154 | */ | |
4155 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
4156 | struct buffer_head *xb_bh, | |
178eeac3 | 4157 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
4158 | { |
4159 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 4160 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
4161 | u16 offset, size, off_change; |
4162 | struct ocfs2_xattr_entry *xe; | |
4163 | struct ocfs2_xattr_block *xb = | |
4164 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4165 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 4166 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4167 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
4168 | char *src = xb_bh->b_data; |
4169 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
4170 | |
4171 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
4172 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
4173 | (unsigned long long)bucket_blkno(bucket)); |
4174 | ||
4175 | for (i = 0; i < blks; i++) | |
4176 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 4177 | |
01225596 TM |
4178 | /* |
4179 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
4180 | * there is a offset change corresponding to the change of | |
4181 | * ocfs2_xattr_header's position. | |
4182 | */ | |
4183 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4184 | xe = &xb_xh->xh_entries[count - 1]; | |
4185 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
4186 | size = blocksize - offset; | |
4187 | ||
4188 | /* copy all the names and values. */ | |
01225596 TM |
4189 | memcpy(target + offset, src + offset, size); |
4190 | ||
4191 | /* Init new header now. */ | |
4192 | xh->xh_count = xb_xh->xh_count; | |
4193 | xh->xh_num_buckets = cpu_to_le16(1); | |
4194 | xh->xh_name_value_len = cpu_to_le16(size); | |
4195 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
4196 | ||
4197 | /* copy all the entries. */ | |
178eeac3 | 4198 | target = bucket_block(bucket, 0); |
01225596 TM |
4199 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
4200 | size = count * sizeof(struct ocfs2_xattr_entry); | |
4201 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
4202 | ||
4203 | /* Change the xe offset for all the xe because of the move. */ | |
4204 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
4205 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4206 | for (i = 0; i < count; i++) | |
4207 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
4208 | ||
4209 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
4210 | offset, size, off_change); | |
4211 | ||
4212 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
4213 | cmp_xe, swap_xe); | |
4214 | } | |
4215 | ||
4216 | /* | |
4217 | * After we move xattr from block to index btree, we have to | |
4218 | * update ocfs2_xattr_search to the new xe and base. | |
4219 | * | |
4220 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
4221 | * While if the entry is in index b-tree, "bucket" indicates the | |
4222 | * real place of the xattr. | |
4223 | */ | |
178eeac3 JB |
4224 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
4225 | struct ocfs2_xattr_search *xs, | |
4226 | struct buffer_head *old_bh) | |
01225596 | 4227 | { |
01225596 TM |
4228 | char *buf = old_bh->b_data; |
4229 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
4230 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 4231 | int i; |
01225596 | 4232 | |
ba937127 | 4233 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 4234 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
4235 | xs->end = xs->base + inode->i_sb->s_blocksize; |
4236 | ||
178eeac3 JB |
4237 | if (xs->not_found) |
4238 | return; | |
01225596 | 4239 | |
178eeac3 JB |
4240 | i = xs->here - old_xh->xh_entries; |
4241 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
4242 | } |
4243 | ||
4244 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
4245 | struct ocfs2_xattr_search *xs, |
4246 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4247 | { |
85db90e7 | 4248 | int ret; |
01225596 TM |
4249 | u32 bit_off, len; |
4250 | u64 blkno; | |
85db90e7 | 4251 | handle_t *handle = ctxt->handle; |
01225596 TM |
4252 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
4253 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
4254 | struct buffer_head *xb_bh = xs->xattr_bh; |
4255 | struct ocfs2_xattr_block *xb = | |
4256 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4257 | struct ocfs2_xattr_tree_root *xr; | |
4258 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
4259 | |
4260 | mlog(0, "create xattr index block for %llu\n", | |
4261 | (unsigned long long)xb_bh->b_blocknr); | |
4262 | ||
4263 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 4264 | BUG_ON(!xs->bucket); |
01225596 | 4265 | |
01225596 TM |
4266 | /* |
4267 | * XXX: | |
4268 | * We can use this lock for now, and maybe move to a dedicated mutex | |
4269 | * if performance becomes a problem later. | |
4270 | */ | |
4271 | down_write(&oi->ip_alloc_sem); | |
4272 | ||
0cf2f763 | 4273 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 4274 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4275 | if (ret) { |
4276 | mlog_errno(ret); | |
85db90e7 | 4277 | goto out; |
01225596 TM |
4278 | } |
4279 | ||
78f30c31 TM |
4280 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
4281 | 1, 1, &bit_off, &len); | |
01225596 TM |
4282 | if (ret) { |
4283 | mlog_errno(ret); | |
85db90e7 | 4284 | goto out; |
01225596 TM |
4285 | } |
4286 | ||
4287 | /* | |
4288 | * The bucket may spread in many blocks, and | |
4289 | * we will only touch the 1st block and the last block | |
4290 | * in the whole bucket(one for entry and one for data). | |
4291 | */ | |
4292 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
4293 | ||
de29c085 MF |
4294 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
4295 | (unsigned long long)blkno); | |
01225596 | 4296 | |
178eeac3 JB |
4297 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
4298 | if (ret) { | |
01225596 | 4299 | mlog_errno(ret); |
85db90e7 | 4300 | goto out; |
01225596 TM |
4301 | } |
4302 | ||
178eeac3 JB |
4303 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
4304 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
4305 | if (ret) { |
4306 | mlog_errno(ret); | |
85db90e7 | 4307 | goto out; |
01225596 TM |
4308 | } |
4309 | ||
178eeac3 JB |
4310 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
4311 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 4312 | |
178eeac3 | 4313 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
4314 | |
4315 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
4316 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
4317 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
4318 | ||
4319 | xr = &xb->xb_attrs.xb_root; | |
4320 | xr->xt_clusters = cpu_to_le32(1); | |
4321 | xr->xt_last_eb_blk = 0; | |
4322 | xr->xt_list.l_tree_depth = 0; | |
4323 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
4324 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
4325 | ||
4326 | xr->xt_list.l_recs[0].e_cpos = 0; | |
4327 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
4328 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
4329 | ||
4330 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
4331 | ||
85db90e7 | 4332 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 4333 | |
85db90e7 | 4334 | out: |
01225596 TM |
4335 | up_write(&oi->ip_alloc_sem); |
4336 | ||
01225596 TM |
4337 | return ret; |
4338 | } | |
4339 | ||
4340 | static int cmp_xe_offset(const void *a, const void *b) | |
4341 | { | |
4342 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4343 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
4344 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
4345 | ||
4346 | if (l_name_offset < r_name_offset) | |
4347 | return 1; | |
4348 | if (l_name_offset > r_name_offset) | |
4349 | return -1; | |
4350 | return 0; | |
4351 | } | |
4352 | ||
4353 | /* | |
4354 | * defrag a xattr bucket if we find that the bucket has some | |
4355 | * holes beteen name/value pairs. | |
4356 | * We will move all the name/value pairs to the end of the bucket | |
4357 | * so that we can spare some space for insertion. | |
4358 | */ | |
4359 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 4360 | handle_t *handle, |
01225596 TM |
4361 | struct ocfs2_xattr_bucket *bucket) |
4362 | { | |
4363 | int ret, i; | |
199799a3 | 4364 | size_t end, offset, len; |
01225596 TM |
4365 | struct ocfs2_xattr_header *xh; |
4366 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 4367 | u64 blkno = bucket_blkno(bucket); |
01225596 | 4368 | u16 xh_free_start; |
01225596 | 4369 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 4370 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
4371 | |
4372 | /* | |
4373 | * In order to make the operation more efficient and generic, | |
4374 | * we copy all the blocks into a contiguous memory and do the | |
4375 | * defragment there, so if anything is error, we will not touch | |
4376 | * the real block. | |
4377 | */ | |
4378 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
4379 | if (!bucket_buf) { | |
4380 | ret = -EIO; | |
4381 | goto out; | |
4382 | } | |
4383 | ||
4384 | buf = bucket_buf; | |
1c32a2fd TM |
4385 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4386 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 4387 | |
1c32a2fd | 4388 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
4389 | OCFS2_JOURNAL_ACCESS_WRITE); |
4390 | if (ret < 0) { | |
4391 | mlog_errno(ret); | |
85db90e7 | 4392 | goto out; |
01225596 TM |
4393 | } |
4394 | ||
4395 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
4396 | entries = (char *)xh->xh_entries; | |
4397 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4398 | ||
4399 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
4400 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
4401 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
4402 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
4403 | |
4404 | /* | |
4405 | * sort all the entries by their offset. | |
4406 | * the largest will be the first, so that we can | |
4407 | * move them to the end one by one. | |
4408 | */ | |
4409 | sort(entries, le16_to_cpu(xh->xh_count), | |
4410 | sizeof(struct ocfs2_xattr_entry), | |
4411 | cmp_xe_offset, swap_xe); | |
4412 | ||
4413 | /* Move all name/values to the end of the bucket. */ | |
4414 | xe = xh->xh_entries; | |
4415 | end = OCFS2_XATTR_BUCKET_SIZE; | |
4416 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
4417 | offset = le16_to_cpu(xe->xe_name_offset); | |
199799a3 | 4418 | len = namevalue_size_xe(xe); |
01225596 TM |
4419 | |
4420 | /* | |
4421 | * We must make sure that the name/value pair | |
4422 | * exist in the same block. So adjust end to | |
4423 | * the previous block end if needed. | |
4424 | */ | |
4425 | if (((end - len) / blocksize != | |
4426 | (end - 1) / blocksize)) | |
4427 | end = end - end % blocksize; | |
4428 | ||
4429 | if (end > offset + len) { | |
4430 | memmove(bucket_buf + end - len, | |
4431 | bucket_buf + offset, len); | |
4432 | xe->xe_name_offset = cpu_to_le16(end - len); | |
4433 | } | |
4434 | ||
4435 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
4436 | "bucket %llu\n", (unsigned long long)blkno); | |
4437 | ||
4438 | end -= len; | |
4439 | } | |
4440 | ||
4441 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
4442 | "bucket %llu\n", (unsigned long long)blkno); | |
4443 | ||
4444 | if (xh_free_start == end) | |
85db90e7 | 4445 | goto out; |
01225596 TM |
4446 | |
4447 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
4448 | xh->xh_free_start = cpu_to_le16(end); | |
4449 | ||
4450 | /* sort the entries by their name_hash. */ | |
4451 | sort(entries, le16_to_cpu(xh->xh_count), | |
4452 | sizeof(struct ocfs2_xattr_entry), | |
4453 | cmp_xe, swap_xe); | |
4454 | ||
4455 | buf = bucket_buf; | |
1c32a2fd TM |
4456 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4457 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
4458 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 4459 | |
01225596 | 4460 | out: |
01225596 TM |
4461 | kfree(bucket_buf); |
4462 | return ret; | |
4463 | } | |
4464 | ||
4465 | /* | |
b5c03e74 JB |
4466 | * prev_blkno points to the start of an existing extent. new_blkno |
4467 | * points to a newly allocated extent. Because we know each of our | |
4468 | * clusters contains more than bucket, we can easily split one cluster | |
4469 | * at a bucket boundary. So we take the last cluster of the existing | |
4470 | * extent and split it down the middle. We move the last half of the | |
4471 | * buckets in the last cluster of the existing extent over to the new | |
4472 | * extent. | |
01225596 | 4473 | * |
b5c03e74 JB |
4474 | * first_bh is the buffer at prev_blkno so we can update the existing |
4475 | * extent's bucket count. header_bh is the bucket were we were hoping | |
4476 | * to insert our xattr. If the bucket move places the target in the new | |
4477 | * extent, we'll update first_bh and header_bh after modifying the old | |
4478 | * extent. | |
4479 | * | |
4480 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
4481 | */ |
4482 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
4483 | handle_t *handle, | |
41cb8148 JB |
4484 | struct ocfs2_xattr_bucket *first, |
4485 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4486 | u64 new_blkno, |
01225596 TM |
4487 | u32 num_clusters, |
4488 | u32 *first_hash) | |
4489 | { | |
c58b6032 | 4490 | int ret; |
41cb8148 JB |
4491 | struct super_block *sb = inode->i_sb; |
4492 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
4493 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 4494 | int to_move = num_buckets / 2; |
c58b6032 | 4495 | u64 src_blkno; |
41cb8148 JB |
4496 | u64 last_cluster_blkno = bucket_blkno(first) + |
4497 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 4498 | |
41cb8148 JB |
4499 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
4500 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 4501 | |
01225596 | 4502 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 4503 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 4504 | |
41cb8148 | 4505 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
4506 | last_cluster_blkno, new_blkno, |
4507 | to_move, first_hash); | |
01225596 TM |
4508 | if (ret) { |
4509 | mlog_errno(ret); | |
4510 | goto out; | |
4511 | } | |
4512 | ||
c58b6032 JB |
4513 | /* This is the first bucket that got moved */ |
4514 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 4515 | |
b5c03e74 | 4516 | /* |
c58b6032 | 4517 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 4518 | * update first and target. |
b5c03e74 | 4519 | */ |
41cb8148 | 4520 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
4521 | /* Find the block for the new target bucket */ |
4522 | src_blkno = new_blkno + | |
41cb8148 JB |
4523 | (bucket_blkno(target) - src_blkno); |
4524 | ||
4525 | ocfs2_xattr_bucket_relse(first); | |
4526 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 4527 | |
b5c03e74 | 4528 | /* |
c58b6032 | 4529 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
4530 | * journal from ocfs2_cp_xattr_bucket(). |
4531 | */ | |
41cb8148 | 4532 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
4533 | if (ret) { |
4534 | mlog_errno(ret); | |
4535 | goto out; | |
4536 | } | |
41cb8148 JB |
4537 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
4538 | if (ret) | |
b5c03e74 | 4539 | mlog_errno(ret); |
01225596 | 4540 | |
01225596 TM |
4541 | } |
4542 | ||
01225596 | 4543 | out: |
01225596 TM |
4544 | return ret; |
4545 | } | |
4546 | ||
01225596 | 4547 | /* |
80bcaf34 TM |
4548 | * Find the suitable pos when we divide a bucket into 2. |
4549 | * We have to make sure the xattrs with the same hash value exist | |
4550 | * in the same bucket. | |
4551 | * | |
4552 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
4553 | * place where the hash value changes. Try to find the most even split. | |
4554 | * The most common case is that all entries have different hash values, | |
4555 | * and the first check we make will find a place to split. | |
4556 | */ | |
4557 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
4558 | { | |
4559 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
4560 | int count = le16_to_cpu(xh->xh_count); | |
4561 | int delta, middle = count / 2; | |
4562 | ||
4563 | /* | |
4564 | * We start at the middle. Each step gets farther away in both | |
4565 | * directions. We therefore hit the change in hash value | |
4566 | * nearest to the middle. Note that this loop does not execute for | |
4567 | * count < 2. | |
4568 | */ | |
4569 | for (delta = 0; delta < middle; delta++) { | |
4570 | /* Let's check delta earlier than middle */ | |
4571 | if (cmp_xe(&entries[middle - delta - 1], | |
4572 | &entries[middle - delta])) | |
4573 | return middle - delta; | |
4574 | ||
4575 | /* For even counts, don't walk off the end */ | |
4576 | if ((middle + delta + 1) == count) | |
4577 | continue; | |
4578 | ||
4579 | /* Now try delta past middle */ | |
4580 | if (cmp_xe(&entries[middle + delta], | |
4581 | &entries[middle + delta + 1])) | |
4582 | return middle + delta + 1; | |
4583 | } | |
4584 | ||
4585 | /* Every entry had the same hash */ | |
4586 | return count; | |
4587 | } | |
4588 | ||
4589 | /* | |
4590 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4591 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4592 | * |
4593 | * Normally half of the xattrs will be moved. But we have to make | |
4594 | * sure that the xattrs with the same hash value are stored in the | |
4595 | * same bucket. If all the xattrs in this bucket have the same hash | |
4596 | * value, the new bucket will be initialized as an empty one and the | |
4597 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4598 | */ |
80bcaf34 TM |
4599 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4600 | handle_t *handle, | |
4601 | u64 blk, | |
4602 | u64 new_blk, | |
4603 | u32 *first_hash, | |
4604 | int new_bucket_head) | |
01225596 TM |
4605 | { |
4606 | int ret, i; | |
199799a3 | 4607 | int count, start, len, name_value_len = 0, name_offset = 0; |
ba937127 | 4608 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4609 | struct ocfs2_xattr_header *xh; |
4610 | struct ocfs2_xattr_entry *xe; | |
4611 | int blocksize = inode->i_sb->s_blocksize; | |
4612 | ||
80bcaf34 | 4613 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 4614 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 4615 | |
ba937127 JB |
4616 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4617 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4618 | if (!s_bucket || !t_bucket) { | |
4619 | ret = -ENOMEM; | |
4620 | mlog_errno(ret); | |
4621 | goto out; | |
4622 | } | |
01225596 | 4623 | |
ba937127 | 4624 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4625 | if (ret) { |
4626 | mlog_errno(ret); | |
4627 | goto out; | |
4628 | } | |
4629 | ||
ba937127 | 4630 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4631 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4632 | if (ret) { |
4633 | mlog_errno(ret); | |
4634 | goto out; | |
4635 | } | |
4636 | ||
784b816a JB |
4637 | /* |
4638 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4639 | * there's no need to read it. | |
4640 | */ | |
ba937127 | 4641 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
4642 | if (ret) { |
4643 | mlog_errno(ret); | |
4644 | goto out; | |
4645 | } | |
4646 | ||
2b656c1d JB |
4647 | /* |
4648 | * Hey, if we're overwriting t_bucket, what difference does | |
4649 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4650 | * same part of ocfs2_cp_xattr_bucket(). | |
4651 | */ | |
ba937127 | 4652 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4653 | new_bucket_head ? |
4654 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4655 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4656 | if (ret) { | |
4657 | mlog_errno(ret); | |
4658 | goto out; | |
01225596 TM |
4659 | } |
4660 | ||
ba937127 | 4661 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4662 | count = le16_to_cpu(xh->xh_count); |
4663 | start = ocfs2_xattr_find_divide_pos(xh); | |
4664 | ||
4665 | if (start == count) { | |
4666 | xe = &xh->xh_entries[start-1]; | |
4667 | ||
4668 | /* | |
4669 | * initialized a new empty bucket here. | |
4670 | * The hash value is set as one larger than | |
4671 | * that of the last entry in the previous bucket. | |
4672 | */ | |
ba937127 JB |
4673 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4674 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4675 | |
ba937127 | 4676 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4677 | xh->xh_free_start = cpu_to_le16(blocksize); |
4678 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4679 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4680 | ||
4681 | goto set_num_buckets; | |
4682 | } | |
4683 | ||
01225596 | 4684 | /* copy the whole bucket to the new first. */ |
ba937127 | 4685 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4686 | |
4687 | /* update the new bucket. */ | |
ba937127 | 4688 | xh = bucket_xh(t_bucket); |
01225596 TM |
4689 | |
4690 | /* | |
4691 | * Calculate the total name/value len and xh_free_start for | |
4692 | * the old bucket first. | |
4693 | */ | |
4694 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4695 | name_value_len = 0; | |
4696 | for (i = 0; i < start; i++) { | |
4697 | xe = &xh->xh_entries[i]; | |
199799a3 | 4698 | name_value_len += namevalue_size_xe(xe); |
01225596 TM |
4699 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) |
4700 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4701 | } | |
4702 | ||
4703 | /* | |
4704 | * Now begin the modification to the new bucket. | |
4705 | * | |
4706 | * In the new bucket, We just move the xattr entry to the beginning | |
4707 | * and don't touch the name/value. So there will be some holes in the | |
4708 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4709 | * called. | |
4710 | */ | |
4711 | xe = &xh->xh_entries[start]; | |
4712 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
4713 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
4714 | (int)((char *)xe - (char *)xh), |
4715 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4716 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4717 | xe = &xh->xh_entries[count - start]; | |
4718 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4719 | memset((char *)xe, 0, len); | |
4720 | ||
4721 | le16_add_cpu(&xh->xh_count, -start); | |
4722 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4723 | ||
4724 | /* Calculate xh_free_start for the new bucket. */ | |
4725 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4726 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4727 | xe = &xh->xh_entries[i]; | |
01225596 TM |
4728 | if (le16_to_cpu(xe->xe_name_offset) < |
4729 | le16_to_cpu(xh->xh_free_start)) | |
4730 | xh->xh_free_start = xe->xe_name_offset; | |
4731 | } | |
4732 | ||
80bcaf34 | 4733 | set_num_buckets: |
01225596 TM |
4734 | /* set xh->xh_num_buckets for the new xh. */ |
4735 | if (new_bucket_head) | |
4736 | xh->xh_num_buckets = cpu_to_le16(1); | |
4737 | else | |
4738 | xh->xh_num_buckets = 0; | |
4739 | ||
ba937127 | 4740 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4741 | |
4742 | /* store the first_hash of the new bucket. */ | |
4743 | if (first_hash) | |
4744 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4745 | ||
4746 | /* | |
80bcaf34 TM |
4747 | * Now only update the 1st block of the old bucket. If we |
4748 | * just added a new empty bucket, there is no need to modify | |
4749 | * it. | |
01225596 | 4750 | */ |
80bcaf34 TM |
4751 | if (start == count) |
4752 | goto out; | |
4753 | ||
ba937127 | 4754 | xh = bucket_xh(s_bucket); |
01225596 TM |
4755 | memset(&xh->xh_entries[start], 0, |
4756 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4757 | xh->xh_count = cpu_to_le16(start); | |
4758 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4759 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4760 | ||
ba937127 | 4761 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4762 | |
4763 | out: | |
ba937127 JB |
4764 | ocfs2_xattr_bucket_free(s_bucket); |
4765 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4766 | |
4767 | return ret; | |
4768 | } | |
4769 | ||
4770 | /* | |
4771 | * Copy xattr from one bucket to another bucket. | |
4772 | * | |
4773 | * The caller must make sure that the journal transaction | |
4774 | * has enough space for journaling. | |
4775 | */ | |
4776 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4777 | handle_t *handle, | |
4778 | u64 s_blkno, | |
4779 | u64 t_blkno, | |
4780 | int t_is_new) | |
4781 | { | |
4980c6da | 4782 | int ret; |
ba937127 | 4783 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4784 | |
4785 | BUG_ON(s_blkno == t_blkno); | |
4786 | ||
4787 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
4788 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
4789 | t_is_new); | |
01225596 | 4790 | |
ba937127 JB |
4791 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4792 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4793 | if (!s_bucket || !t_bucket) { | |
4794 | ret = -ENOMEM; | |
4795 | mlog_errno(ret); | |
4796 | goto out; | |
4797 | } | |
92de109a | 4798 | |
ba937127 | 4799 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4800 | if (ret) |
4801 | goto out; | |
4802 | ||
784b816a JB |
4803 | /* |
4804 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4805 | * there's no need to read it. | |
4806 | */ | |
ba937127 | 4807 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
4808 | if (ret) |
4809 | goto out; | |
4810 | ||
2b656c1d JB |
4811 | /* |
4812 | * Hey, if we're overwriting t_bucket, what difference does | |
4813 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4814 | * cluster to fill, we came here from |
4815 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4816 | * ACCESS_CREATE is required. But we also might have moved data | |
4817 | * out of t_bucket before extending back into it. | |
4818 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4819 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4820 | * and copied out the end of the old extent. Then it re-extends |
4821 | * the old extent back to create space for new xattrs. That's | |
4822 | * how we get here, and the bucket isn't really new. | |
4823 | */ | |
ba937127 | 4824 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4825 | t_is_new ? |
4826 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4827 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4828 | if (ret) | |
4829 | goto out; | |
01225596 | 4830 | |
ba937127 JB |
4831 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4832 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4833 | |
4834 | out: | |
ba937127 JB |
4835 | ocfs2_xattr_bucket_free(t_bucket); |
4836 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4837 | |
4838 | return ret; | |
4839 | } | |
4840 | ||
4841 | /* | |
874d65af JB |
4842 | * src_blk points to the start of an existing extent. last_blk points to |
4843 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4844 | * extent. We copy the buckets from the cluster at last_blk to the new |
4845 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4846 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4847 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4848 | * by the same amount. | |
01225596 | 4849 | */ |
54ecb6b6 JB |
4850 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4851 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4852 | unsigned int start_bucket, | |
4853 | u32 *first_hash) | |
01225596 TM |
4854 | { |
4855 | int i, ret, credits; | |
4856 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4857 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4858 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4859 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4860 | |
874d65af JB |
4861 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4862 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4863 | |
54ecb6b6 JB |
4864 | BUG_ON(start_bucket >= num_buckets); |
4865 | if (start_bucket) { | |
4866 | num_buckets -= start_bucket; | |
4867 | last_blk += (start_bucket * blks_per_bucket); | |
4868 | } | |
4869 | ||
15d60929 JB |
4870 | /* The first bucket of the original extent */ |
4871 | old_first = ocfs2_xattr_bucket_new(inode); | |
4872 | /* The first bucket of the new extent */ | |
4873 | new_first = ocfs2_xattr_bucket_new(inode); | |
4874 | if (!old_first || !new_first) { | |
4875 | ret = -ENOMEM; | |
4876 | mlog_errno(ret); | |
4877 | goto out; | |
4878 | } | |
4879 | ||
874d65af | 4880 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4881 | if (ret) { |
4882 | mlog_errno(ret); | |
4883 | goto out; | |
4884 | } | |
4885 | ||
01225596 | 4886 | /* |
54ecb6b6 JB |
4887 | * We need to update the first bucket of the old extent and all |
4888 | * the buckets going to the new extent. | |
01225596 | 4889 | */ |
54ecb6b6 JB |
4890 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4891 | handle->h_buffer_credits; | |
01225596 TM |
4892 | ret = ocfs2_extend_trans(handle, credits); |
4893 | if (ret) { | |
4894 | mlog_errno(ret); | |
4895 | goto out; | |
4896 | } | |
4897 | ||
15d60929 JB |
4898 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4899 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4900 | if (ret) { |
4901 | mlog_errno(ret); | |
4902 | goto out; | |
4903 | } | |
4904 | ||
4905 | for (i = 0; i < num_buckets; i++) { | |
4906 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4907 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4908 | to_blk + (i * blks_per_bucket), |
4909 | 1); | |
01225596 TM |
4910 | if (ret) { |
4911 | mlog_errno(ret); | |
4912 | goto out; | |
4913 | } | |
01225596 TM |
4914 | } |
4915 | ||
15d60929 JB |
4916 | /* |
4917 | * Get the new bucket ready before we dirty anything | |
4918 | * (This actually shouldn't fail, because we already dirtied | |
4919 | * it once in ocfs2_cp_xattr_bucket()). | |
4920 | */ | |
4921 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4922 | if (ret) { | |
01225596 TM |
4923 | mlog_errno(ret); |
4924 | goto out; | |
4925 | } | |
15d60929 JB |
4926 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4927 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4928 | if (ret) { |
4929 | mlog_errno(ret); | |
4930 | goto out; | |
4931 | } | |
4932 | ||
15d60929 JB |
4933 | /* Now update the headers */ |
4934 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4935 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4936 | |
15d60929 JB |
4937 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4938 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4939 | |
4940 | if (first_hash) | |
15d60929 JB |
4941 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4942 | ||
01225596 | 4943 | out: |
15d60929 JB |
4944 | ocfs2_xattr_bucket_free(new_first); |
4945 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4946 | return ret; |
4947 | } | |
4948 | ||
4949 | /* | |
80bcaf34 | 4950 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4951 | * This function should only be called when bucket size == cluster size. |
4952 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4953 | */ | |
80bcaf34 TM |
4954 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4955 | handle_t *handle, | |
4956 | u64 prev_blk, | |
4957 | u64 new_blk, | |
4958 | u32 *first_hash) | |
01225596 TM |
4959 | { |
4960 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4961 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4962 | |
4963 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4964 | ||
4965 | ret = ocfs2_extend_trans(handle, credits); | |
4966 | if (ret) { | |
4967 | mlog_errno(ret); | |
4968 | return ret; | |
4969 | } | |
4970 | ||
4971 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4972 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4973 | new_blk, first_hash, 1); | |
01225596 TM |
4974 | } |
4975 | ||
4976 | /* | |
4977 | * Move some xattrs from the old cluster to the new one since they are not | |
4978 | * contiguous in ocfs2 xattr tree. | |
4979 | * | |
4980 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4981 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4982 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4983 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4984 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4985 | * to extend the insert bucket. | |
4986 | * | |
4987 | * The problem is how much xattr should we move to the new one and when should | |
4988 | * we update first_bh and header_bh? | |
4989 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4990 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4991 | * update the first_bh and header_bh if the insert bucket has been moved | |
4992 | * to the new cluster. | |
4993 | * 2. If cluster_size == bucket_size: | |
4994 | * a) If the previous extent rec has more than one cluster and the insert | |
4995 | * place isn't in the last cluster, copy the entire last cluster to the | |
4996 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4997 | * since they will not be moved into the new cluster. | |
4998 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4999 | * the new one. And we set the extend flag to zero if the insert place is | |
5000 | * moved into the new allocated cluster since no extend is needed. | |
5001 | */ | |
5002 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
5003 | handle_t *handle, | |
012ee910 JB |
5004 | struct ocfs2_xattr_bucket *first, |
5005 | struct ocfs2_xattr_bucket *target, | |
01225596 | 5006 | u64 new_blk, |
01225596 TM |
5007 | u32 prev_clusters, |
5008 | u32 *v_start, | |
5009 | int *extend) | |
5010 | { | |
92cf3adf | 5011 | int ret; |
01225596 TM |
5012 | |
5013 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 5014 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 5015 | (unsigned long long)new_blk); |
01225596 | 5016 | |
41cb8148 | 5017 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
5018 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
5019 | handle, | |
41cb8148 | 5020 | first, target, |
01225596 | 5021 | new_blk, |
01225596 TM |
5022 | prev_clusters, |
5023 | v_start); | |
012ee910 | 5024 | if (ret) |
41cb8148 | 5025 | mlog_errno(ret); |
41cb8148 | 5026 | } else { |
92cf3adf JB |
5027 | /* The start of the last cluster in the first extent */ |
5028 | u64 last_blk = bucket_blkno(first) + | |
5029 | ((prev_clusters - 1) * | |
5030 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 5031 | |
012ee910 | 5032 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 5033 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 5034 | bucket_blkno(first), |
54ecb6b6 | 5035 | last_blk, new_blk, 0, |
01225596 | 5036 | v_start); |
012ee910 JB |
5037 | if (ret) |
5038 | mlog_errno(ret); | |
5039 | } else { | |
80bcaf34 TM |
5040 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
5041 | last_blk, new_blk, | |
5042 | v_start); | |
012ee910 JB |
5043 | if (ret) |
5044 | mlog_errno(ret); | |
01225596 | 5045 | |
92cf3adf | 5046 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
5047 | *extend = 0; |
5048 | } | |
5049 | } | |
5050 | ||
5051 | return ret; | |
5052 | } | |
5053 | ||
5054 | /* | |
5055 | * Add a new cluster for xattr storage. | |
5056 | * | |
5057 | * If the new cluster is contiguous with the previous one, it will be | |
5058 | * appended to the same extent record, and num_clusters will be updated. | |
5059 | * If not, we will insert a new extent for it and move some xattrs in | |
5060 | * the last cluster into the new allocated one. | |
5061 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
5062 | * lose the benefits of hashing because we'll have to search large leaves. | |
5063 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
5064 | * if it's bigger). | |
5065 | * | |
5066 | * first_bh is the first block of the previous extent rec and header_bh | |
5067 | * indicates the bucket we will insert the new xattrs. They will be updated | |
5068 | * when the header_bh is moved into the new cluster. | |
5069 | */ | |
5070 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
5071 | struct buffer_head *root_bh, | |
ed29c0ca JB |
5072 | struct ocfs2_xattr_bucket *first, |
5073 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
5074 | u32 *num_clusters, |
5075 | u32 prev_cpos, | |
78f30c31 TM |
5076 | int *extend, |
5077 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5078 | { |
85db90e7 | 5079 | int ret; |
01225596 TM |
5080 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
5081 | u32 prev_clusters = *num_clusters; | |
5082 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
5083 | u64 block; | |
85db90e7 | 5084 | handle_t *handle = ctxt->handle; |
01225596 | 5085 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 5086 | struct ocfs2_extent_tree et; |
01225596 TM |
5087 | |
5088 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
5089 | "previous xattr blkno = %llu\n", | |
5090 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 5091 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 5092 | |
5e404e9e | 5093 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 5094 | |
0cf2f763 | 5095 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5096 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5097 | if (ret < 0) { |
5098 | mlog_errno(ret); | |
5099 | goto leave; | |
5100 | } | |
5101 | ||
78f30c31 | 5102 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
5103 | clusters_to_add, &bit_off, &num_bits); |
5104 | if (ret < 0) { | |
5105 | if (ret != -ENOSPC) | |
5106 | mlog_errno(ret); | |
5107 | goto leave; | |
5108 | } | |
5109 | ||
5110 | BUG_ON(num_bits > clusters_to_add); | |
5111 | ||
5112 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
5113 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
5114 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
5115 | ||
ed29c0ca | 5116 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
5117 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
5118 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
5119 | /* | |
5120 | * If this cluster is contiguous with the old one and | |
5121 | * adding this new cluster, we don't surpass the limit of | |
5122 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
5123 | * initialized and used like other buckets in the previous | |
5124 | * cluster. | |
5125 | * So add it as a contiguous one. The caller will handle | |
5126 | * its init process. | |
5127 | */ | |
5128 | v_start = prev_cpos + prev_clusters; | |
5129 | *num_clusters = prev_clusters + num_bits; | |
5130 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
5131 | num_bits); | |
5132 | } else { | |
5133 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
5134 | handle, | |
012ee910 JB |
5135 | first, |
5136 | target, | |
01225596 | 5137 | block, |
01225596 TM |
5138 | prev_clusters, |
5139 | &v_start, | |
5140 | extend); | |
5141 | if (ret) { | |
5142 | mlog_errno(ret); | |
5143 | goto leave; | |
5144 | } | |
5145 | } | |
5146 | ||
5147 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 5148 | num_bits, (unsigned long long)block, v_start); |
cc79d8c1 | 5149 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 5150 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
5151 | if (ret < 0) { |
5152 | mlog_errno(ret); | |
5153 | goto leave; | |
5154 | } | |
5155 | ||
5156 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 5157 | if (ret < 0) |
01225596 | 5158 | mlog_errno(ret); |
01225596 TM |
5159 | |
5160 | leave: | |
01225596 TM |
5161 | return ret; |
5162 | } | |
5163 | ||
5164 | /* | |
92de109a JB |
5165 | * We are given an extent. 'first' is the bucket at the very front of |
5166 | * the extent. The extent has space for an additional bucket past | |
5167 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
5168 | * of the target bucket. We wish to shift every bucket past the target | |
5169 | * down one, filling in that additional space. When we get back to the | |
5170 | * target, we split the target between itself and the now-empty bucket | |
5171 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
5172 | */ |
5173 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 5174 | handle_t *handle, |
92de109a JB |
5175 | struct ocfs2_xattr_bucket *first, |
5176 | u64 target_blk, | |
01225596 TM |
5177 | u32 num_clusters) |
5178 | { | |
5179 | int ret, credits; | |
5180 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5181 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
5182 | u64 end_blk; |
5183 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
5184 | |
5185 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
5186 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
5187 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 5188 | |
92de109a JB |
5189 | /* The extent must have room for an additional bucket */ |
5190 | BUG_ON(new_bucket >= | |
5191 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 5192 | |
92de109a JB |
5193 | /* end_blk points to the last existing bucket */ |
5194 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
5195 | |
5196 | /* | |
92de109a JB |
5197 | * end_blk is the start of the last existing bucket. |
5198 | * Thus, (end_blk - target_blk) covers the target bucket and | |
5199 | * every bucket after it up to, but not including, the last | |
5200 | * existing bucket. Then we add the last existing bucket, the | |
5201 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 5202 | */ |
92de109a | 5203 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
5204 | handle->h_buffer_credits; |
5205 | ret = ocfs2_extend_trans(handle, credits); | |
5206 | if (ret) { | |
01225596 TM |
5207 | mlog_errno(ret); |
5208 | goto out; | |
5209 | } | |
5210 | ||
92de109a JB |
5211 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
5212 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
5213 | if (ret) { |
5214 | mlog_errno(ret); | |
85db90e7 | 5215 | goto out; |
01225596 TM |
5216 | } |
5217 | ||
92de109a | 5218 | while (end_blk != target_blk) { |
01225596 TM |
5219 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
5220 | end_blk + blk_per_bucket, 0); | |
5221 | if (ret) | |
85db90e7 | 5222 | goto out; |
01225596 TM |
5223 | end_blk -= blk_per_bucket; |
5224 | } | |
5225 | ||
92de109a JB |
5226 | /* Move half of the xattr in target_blkno to the next bucket. */ |
5227 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
5228 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 5229 | |
92de109a JB |
5230 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
5231 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 5232 | |
01225596 TM |
5233 | out: |
5234 | return ret; | |
5235 | } | |
5236 | ||
5237 | /* | |
91f2033f JB |
5238 | * Add new xattr bucket in an extent record and adjust the buckets |
5239 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
5240 | * bucket we want to insert into. | |
01225596 | 5241 | * |
91f2033f JB |
5242 | * In the easy case, we will move all the buckets after target down by |
5243 | * one. Half of target's xattrs will be moved to the next bucket. | |
5244 | * | |
5245 | * If current cluster is full, we'll allocate a new one. This may not | |
5246 | * be contiguous. The underlying calls will make sure that there is | |
5247 | * space for the insert, shifting buckets around if necessary. | |
5248 | * 'target' may be moved by those calls. | |
01225596 TM |
5249 | */ |
5250 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
5251 | struct buffer_head *xb_bh, | |
91f2033f | 5252 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 5253 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 5254 | { |
01225596 TM |
5255 | struct ocfs2_xattr_block *xb = |
5256 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5257 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
5258 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
5259 | u32 name_hash = |
5260 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 5261 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
5262 | int ret, num_buckets, extend = 1; |
5263 | u64 p_blkno; | |
5264 | u32 e_cpos, num_clusters; | |
92de109a | 5265 | /* The bucket at the front of the extent */ |
91f2033f | 5266 | struct ocfs2_xattr_bucket *first; |
01225596 | 5267 | |
91f2033f JB |
5268 | mlog(0, "Add new xattr bucket starting from %llu\n", |
5269 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 5270 | |
ed29c0ca | 5271 | /* The first bucket of the original extent */ |
92de109a | 5272 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 5273 | if (!first) { |
92de109a JB |
5274 | ret = -ENOMEM; |
5275 | mlog_errno(ret); | |
5276 | goto out; | |
5277 | } | |
5278 | ||
01225596 TM |
5279 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
5280 | &num_clusters, el); | |
5281 | if (ret) { | |
5282 | mlog_errno(ret); | |
5283 | goto out; | |
5284 | } | |
5285 | ||
ed29c0ca | 5286 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
5287 | if (ret) { |
5288 | mlog_errno(ret); | |
5289 | goto out; | |
5290 | } | |
5291 | ||
ed29c0ca JB |
5292 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
5293 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
5294 | /* | |
5295 | * This can move first+target if the target bucket moves | |
5296 | * to the new extent. | |
5297 | */ | |
01225596 TM |
5298 | ret = ocfs2_add_new_xattr_cluster(inode, |
5299 | xb_bh, | |
ed29c0ca JB |
5300 | first, |
5301 | target, | |
01225596 TM |
5302 | &num_clusters, |
5303 | e_cpos, | |
78f30c31 TM |
5304 | &extend, |
5305 | ctxt); | |
01225596 TM |
5306 | if (ret) { |
5307 | mlog_errno(ret); | |
5308 | goto out; | |
5309 | } | |
5310 | } | |
5311 | ||
92de109a | 5312 | if (extend) { |
01225596 | 5313 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 5314 | ctxt->handle, |
ed29c0ca JB |
5315 | first, |
5316 | bucket_blkno(target), | |
01225596 | 5317 | num_clusters); |
92de109a JB |
5318 | if (ret) |
5319 | mlog_errno(ret); | |
5320 | } | |
5321 | ||
01225596 | 5322 | out: |
92de109a | 5323 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 5324 | |
01225596 TM |
5325 | return ret; |
5326 | } | |
5327 | ||
5328 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
5329 | struct ocfs2_xattr_bucket *bucket, | |
5330 | int offs) | |
5331 | { | |
5332 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
5333 | ||
5334 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 5335 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
5336 | } |
5337 | ||
01225596 TM |
5338 | /* |
5339 | * Truncate the specified xe_off entry in xattr bucket. | |
5340 | * bucket is indicated by header_bh and len is the new length. | |
5341 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
5342 | * | |
5343 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
5344 | */ | |
5345 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 5346 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 5347 | int xe_off, |
78f30c31 TM |
5348 | int len, |
5349 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5350 | { |
5351 | int ret, offset; | |
5352 | u64 value_blk; | |
01225596 | 5353 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 5354 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 5355 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
5356 | struct ocfs2_xattr_value_buf vb = { |
5357 | .vb_access = ocfs2_journal_access, | |
5358 | }; | |
01225596 TM |
5359 | |
5360 | xe = &xh->xh_entries[xe_off]; | |
5361 | ||
5362 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
5363 | ||
5364 | offset = le16_to_cpu(xe->xe_name_offset) + | |
5365 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5366 | ||
5367 | value_blk = offset / blocksize; | |
5368 | ||
5369 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
5370 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 5371 | |
b3e5d379 JB |
5372 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
5373 | BUG_ON(!vb.vb_bh); | |
01225596 | 5374 | |
b3e5d379 JB |
5375 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
5376 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 5377 | |
548b0f22 JB |
5378 | /* |
5379 | * From here on out we have to dirty the bucket. The generic | |
5380 | * value calls only modify one of the bucket's bhs, but we need | |
5381 | * to send the bucket at once. So if they error, they *could* have | |
5382 | * modified something. We have to assume they did, and dirty | |
5383 | * the whole bucket. This leaves us in a consistent state. | |
5384 | */ | |
5385 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
5386 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 5387 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
5388 | if (ret) { |
5389 | mlog_errno(ret); | |
554e7f9e TM |
5390 | goto out; |
5391 | } | |
5392 | ||
5393 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5394 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5395 | if (ret) { | |
5396 | mlog_errno(ret); | |
5397 | goto out; | |
01225596 TM |
5398 | } |
5399 | ||
548b0f22 JB |
5400 | xe->xe_value_size = cpu_to_le64(len); |
5401 | ||
548b0f22 JB |
5402 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5403 | ||
01225596 | 5404 | out: |
01225596 TM |
5405 | return ret; |
5406 | } | |
5407 | ||
01225596 TM |
5408 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5409 | struct buffer_head *root_bh, | |
5410 | u64 blkno, | |
5411 | u32 cpos, | |
47bca495 TM |
5412 | u32 len, |
5413 | void *para) | |
01225596 TM |
5414 | { |
5415 | int ret; | |
5416 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5417 | struct inode *tl_inode = osb->osb_tl_inode; | |
5418 | handle_t *handle; | |
5419 | struct ocfs2_xattr_block *xb = | |
5420 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5421 | struct ocfs2_alloc_context *meta_ac = NULL; |
5422 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5423 | struct ocfs2_extent_tree et; |
5424 | ||
47bca495 | 5425 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5426 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5427 | if (ret) { |
5428 | mlog_errno(ret); | |
5429 | return ret; | |
5430 | } | |
5431 | ||
5e404e9e | 5432 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5433 | |
5434 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5435 | ||
5436 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
5437 | cpos, len, (unsigned long long)blkno); | |
5438 | ||
8cb471e8 JB |
5439 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5440 | len); | |
01225596 | 5441 | |
f99b9b7c | 5442 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5443 | if (ret) { |
5444 | mlog_errno(ret); | |
5445 | return ret; | |
5446 | } | |
5447 | ||
5448 | mutex_lock(&tl_inode->i_mutex); | |
5449 | ||
5450 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5451 | ret = __ocfs2_flush_truncate_log(osb); | |
5452 | if (ret < 0) { | |
5453 | mlog_errno(ret); | |
5454 | goto out; | |
5455 | } | |
5456 | } | |
5457 | ||
a90714c1 | 5458 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5459 | if (IS_ERR(handle)) { |
01225596 TM |
5460 | ret = -ENOMEM; |
5461 | mlog_errno(ret); | |
5462 | goto out; | |
5463 | } | |
5464 | ||
0cf2f763 | 5465 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5466 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5467 | if (ret) { |
5468 | mlog_errno(ret); | |
5469 | goto out_commit; | |
5470 | } | |
5471 | ||
dbdcf6a4 | 5472 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5473 | &dealloc); |
01225596 TM |
5474 | if (ret) { |
5475 | mlog_errno(ret); | |
5476 | goto out_commit; | |
5477 | } | |
5478 | ||
5479 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
5480 | ||
5481 | ret = ocfs2_journal_dirty(handle, root_bh); | |
5482 | if (ret) { | |
5483 | mlog_errno(ret); | |
5484 | goto out_commit; | |
5485 | } | |
5486 | ||
5487 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5488 | if (ret) | |
5489 | mlog_errno(ret); | |
5490 | ||
5491 | out_commit: | |
5492 | ocfs2_commit_trans(osb, handle); | |
5493 | out: | |
5494 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5495 | ||
5496 | mutex_unlock(&tl_inode->i_mutex); | |
5497 | ||
5498 | if (meta_ac) | |
5499 | ocfs2_free_alloc_context(meta_ac); | |
5500 | ||
5501 | ocfs2_run_deallocs(osb, &dealloc); | |
5502 | ||
5503 | return ret; | |
5504 | } | |
5505 | ||
80bcaf34 TM |
5506 | /* |
5507 | * check whether the xattr bucket is filled up with the same hash value. | |
5508 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5509 | * If we want to insert a xattr with different hash value, go ahead | |
5510 | * and ocfs2_divide_xattr_bucket will handle this. | |
5511 | */ | |
01225596 | 5512 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5513 | struct ocfs2_xattr_bucket *bucket, |
5514 | const char *name) | |
01225596 | 5515 | { |
3e632946 | 5516 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5517 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5518 | ||
5519 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5520 | return 0; | |
01225596 TM |
5521 | |
5522 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5523 | xh->xh_entries[0].xe_name_hash) { | |
5524 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5525 | "hash = %u\n", | |
9c7759aa | 5526 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5527 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5528 | return -ENOSPC; | |
5529 | } | |
5530 | ||
5531 | return 0; | |
5532 | } | |
5533 | ||
c5d95df5 JB |
5534 | /* |
5535 | * Try to set the entry in the current bucket. If we fail, the caller | |
5536 | * will handle getting us another bucket. | |
5537 | */ | |
5538 | static int ocfs2_xattr_set_entry_bucket(struct inode *inode, | |
5539 | struct ocfs2_xattr_info *xi, | |
5540 | struct ocfs2_xattr_search *xs, | |
5541 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5542 | { |
c5d95df5 JB |
5543 | int ret; |
5544 | struct ocfs2_xa_loc loc; | |
01225596 | 5545 | |
c5d95df5 | 5546 | mlog_entry("Set xattr %s in xattr bucket\n", xi->xi_name); |
01225596 | 5547 | |
c5d95df5 JB |
5548 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
5549 | xs->not_found ? NULL : xs->here); | |
5550 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
5551 | if (!ret) { | |
5552 | xs->here = loc.xl_entry; | |
5553 | goto out; | |
5554 | } | |
5555 | if (ret != -ENOSPC) { | |
5556 | mlog_errno(ret); | |
5557 | goto out; | |
5558 | } | |
01225596 | 5559 | |
c5d95df5 JB |
5560 | /* Ok, we need space. Let's try defragmenting the bucket. */ |
5561 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, | |
5562 | xs->bucket); | |
5563 | if (ret) { | |
5564 | mlog_errno(ret); | |
5565 | goto out; | |
5566 | } | |
01225596 | 5567 | |
c5d95df5 JB |
5568 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
5569 | if (!ret) { | |
5570 | xs->here = loc.xl_entry; | |
5571 | goto out; | |
01225596 | 5572 | } |
c5d95df5 JB |
5573 | if (ret != -ENOSPC) |
5574 | mlog_errno(ret); | |
01225596 | 5575 | |
01225596 | 5576 | |
c5d95df5 JB |
5577 | out: |
5578 | mlog_exit(ret); | |
5579 | return ret; | |
5580 | } | |
01225596 | 5581 | |
c5d95df5 JB |
5582 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
5583 | struct ocfs2_xattr_info *xi, | |
5584 | struct ocfs2_xattr_search *xs, | |
5585 | struct ocfs2_xattr_set_ctxt *ctxt) | |
5586 | { | |
5587 | int ret; | |
01225596 | 5588 | |
c5d95df5 | 5589 | mlog_entry("Set xattr %s in xattr index block\n", xi->xi_name); |
01225596 | 5590 | |
c5d95df5 JB |
5591 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
5592 | if (!ret) | |
5593 | goto out; | |
5594 | if (ret != -ENOSPC) { | |
5595 | mlog_errno(ret); | |
5596 | goto out; | |
5597 | } | |
01225596 | 5598 | |
c5d95df5 | 5599 | /* Ack, need more space. Let's try to get another bucket! */ |
01225596 | 5600 | |
c5d95df5 JB |
5601 | /* |
5602 | * We do not allow for overlapping ranges between buckets. And | |
5603 | * the maximum number of collisions we will allow for then is | |
5604 | * one bucket's worth, so check it here whether we need to | |
5605 | * add a new bucket for the insert. | |
5606 | */ | |
5607 | ret = ocfs2_check_xattr_bucket_collision(inode, | |
91f2033f | 5608 | xs->bucket, |
c5d95df5 JB |
5609 | xi->xi_name); |
5610 | if (ret) { | |
5611 | mlog_errno(ret); | |
5612 | goto out; | |
5613 | } | |
01225596 | 5614 | |
c5d95df5 JB |
5615 | ret = ocfs2_add_new_xattr_bucket(inode, |
5616 | xs->xattr_bh, | |
5617 | xs->bucket, | |
5618 | ctxt); | |
5619 | if (ret) { | |
5620 | mlog_errno(ret); | |
5621 | goto out; | |
01225596 TM |
5622 | } |
5623 | ||
c5d95df5 JB |
5624 | /* |
5625 | * ocfs2_add_new_xattr_bucket() will have updated | |
5626 | * xs->bucket if it moved, but it will not have updated | |
5627 | * any of the other search fields. Thus, we drop it and | |
5628 | * re-search. Everything should be cached, so it'll be | |
5629 | * quick. | |
5630 | */ | |
5631 | ocfs2_xattr_bucket_relse(xs->bucket); | |
5632 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
5633 | xi->xi_name_index, | |
5634 | xi->xi_name, xs); | |
5635 | if (ret && ret != -ENODATA) | |
5636 | goto out; | |
5637 | xs->not_found = ret; | |
5638 | ||
5639 | /* Ok, we have a new bucket, let's try again */ | |
5640 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); | |
5641 | if (ret && (ret != -ENOSPC)) | |
5642 | mlog_errno(ret); | |
5643 | ||
01225596 TM |
5644 | out: |
5645 | mlog_exit(ret); | |
5646 | return ret; | |
5647 | } | |
a3944256 TM |
5648 | |
5649 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5650 | struct ocfs2_xattr_bucket *bucket, | |
5651 | void *para) | |
5652 | { | |
ce9c5a54 | 5653 | int ret = 0, ref_credits; |
3e632946 | 5654 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5655 | u16 i; |
5656 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5657 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5658 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5659 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5660 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5661 | struct ocfs2_xattr_value_root *xv; |
5662 | struct ocfs2_rm_xattr_bucket_para *args = | |
5663 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5664 | |
5665 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5666 | |
5667 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5668 | xe = &xh->xh_entries[i]; | |
5669 | if (ocfs2_xattr_is_local(xe)) | |
5670 | continue; | |
5671 | ||
ce9c5a54 TM |
5672 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5673 | i, &xv, NULL); | |
5674 | ||
5675 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5676 | args->ref_ci, | |
5677 | args->ref_root_bh, | |
5678 | &ctxt.meta_ac, | |
5679 | &ref_credits); | |
5680 | ||
5681 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5682 | if (IS_ERR(ctxt.handle)) { |
5683 | ret = PTR_ERR(ctxt.handle); | |
5684 | mlog_errno(ret); | |
5685 | break; | |
5686 | } | |
5687 | ||
548b0f22 | 5688 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5689 | i, 0, &ctxt); |
88c3b062 TM |
5690 | |
5691 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5692 | if (ctxt.meta_ac) { |
5693 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5694 | ctxt.meta_ac = NULL; | |
5695 | } | |
a3944256 TM |
5696 | if (ret) { |
5697 | mlog_errno(ret); | |
5698 | break; | |
5699 | } | |
5700 | } | |
5701 | ||
ce9c5a54 TM |
5702 | if (ctxt.meta_ac) |
5703 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5704 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5705 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5706 | return ret; |
5707 | } | |
5708 | ||
492a8a33 TM |
5709 | /* |
5710 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5711 | * or change the extent record flag), we need to recalculate | |
5712 | * the metaecc for the whole bucket. So it is done here. | |
5713 | * | |
5714 | * Note: | |
5715 | * We have to give the extra credits for the caller. | |
5716 | */ | |
5717 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5718 | handle_t *handle, | |
5719 | void *para) | |
5720 | { | |
5721 | int ret; | |
5722 | struct ocfs2_xattr_bucket *bucket = | |
5723 | (struct ocfs2_xattr_bucket *)para; | |
5724 | ||
5725 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5726 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5727 | if (ret) { | |
5728 | mlog_errno(ret); | |
5729 | return ret; | |
5730 | } | |
5731 | ||
5732 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5733 | ||
5734 | return 0; | |
5735 | } | |
5736 | ||
5737 | /* | |
5738 | * Special action we need if the xattr value is refcounted. | |
5739 | * | |
5740 | * 1. If the xattr is refcounted, lock the tree. | |
5741 | * 2. CoW the xattr if we are setting the new value and the value | |
5742 | * will be stored outside. | |
5743 | * 3. In other case, decrease_refcount will work for us, so just | |
5744 | * lock the refcount tree, calculate the meta and credits is OK. | |
5745 | * | |
5746 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5747 | * currently CoW is a completed transaction, while this function | |
5748 | * will also lock the allocators and let us deadlock. So we will | |
5749 | * CoW the whole xattr value. | |
5750 | */ | |
5751 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5752 | struct ocfs2_dinode *di, | |
5753 | struct ocfs2_xattr_info *xi, | |
5754 | struct ocfs2_xattr_search *xis, | |
5755 | struct ocfs2_xattr_search *xbs, | |
5756 | struct ocfs2_refcount_tree **ref_tree, | |
5757 | int *meta_add, | |
5758 | int *credits) | |
5759 | { | |
5760 | int ret = 0; | |
5761 | struct ocfs2_xattr_block *xb; | |
5762 | struct ocfs2_xattr_entry *xe; | |
5763 | char *base; | |
5764 | u32 p_cluster, num_clusters; | |
5765 | unsigned int ext_flags; | |
5766 | int name_offset, name_len; | |
5767 | struct ocfs2_xattr_value_buf vb; | |
5768 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5769 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5770 | struct ocfs2_post_refcount refcount; | |
5771 | struct ocfs2_post_refcount *p = NULL; | |
5772 | struct buffer_head *ref_root_bh = NULL; | |
5773 | ||
5774 | if (!xis->not_found) { | |
5775 | xe = xis->here; | |
5776 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5777 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5778 | base = xis->base; | |
5779 | vb.vb_bh = xis->inode_bh; | |
5780 | vb.vb_access = ocfs2_journal_access_di; | |
5781 | } else { | |
5782 | int i, block_off = 0; | |
5783 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5784 | xe = xbs->here; | |
5785 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5786 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5787 | i = xbs->here - xbs->header->xh_entries; | |
5788 | ||
5789 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5790 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5791 | bucket_xh(xbs->bucket), |
5792 | i, &block_off, | |
5793 | &name_offset); | |
5794 | if (ret) { | |
5795 | mlog_errno(ret); | |
5796 | goto out; | |
5797 | } | |
5798 | base = bucket_block(xbs->bucket, block_off); | |
5799 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5800 | vb.vb_access = ocfs2_journal_access; | |
5801 | ||
5802 | if (ocfs2_meta_ecc(osb)) { | |
5803 | /*create parameters for ocfs2_post_refcount. */ | |
5804 | bucket = xbs->bucket; | |
5805 | refcount.credits = bucket->bu_blocks; | |
5806 | refcount.para = bucket; | |
5807 | refcount.func = | |
5808 | ocfs2_xattr_bucket_post_refcount; | |
5809 | p = &refcount; | |
5810 | } | |
5811 | } else { | |
5812 | base = xbs->base; | |
5813 | vb.vb_bh = xbs->xattr_bh; | |
5814 | vb.vb_access = ocfs2_journal_access_xb; | |
5815 | } | |
5816 | } | |
5817 | ||
5818 | if (ocfs2_xattr_is_local(xe)) | |
5819 | goto out; | |
5820 | ||
5821 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5822 | (base + name_offset + name_len); | |
5823 | ||
5824 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5825 | &num_clusters, &vb.vb_xv->xr_list, | |
5826 | &ext_flags); | |
5827 | if (ret) { | |
5828 | mlog_errno(ret); | |
5829 | goto out; | |
5830 | } | |
5831 | ||
5832 | /* | |
5833 | * We just need to check the 1st extent record, since we always | |
5834 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5835 | * some REFCOUNT extent recs after the 1st one. | |
5836 | */ | |
5837 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5838 | goto out; | |
5839 | ||
5840 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5841 | 1, ref_tree, &ref_root_bh); | |
5842 | if (ret) { | |
5843 | mlog_errno(ret); | |
5844 | goto out; | |
5845 | } | |
5846 | ||
5847 | /* | |
5848 | * If we are deleting the xattr or the new size will be stored inside, | |
5849 | * cool, leave it there, the xattr truncate process will remove them | |
5850 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5851 | * And the worse case is that every cluster truncate will split the | |
5852 | * refcount tree, and make the original extent become 3. So we will need | |
5853 | * 2 * cluster more extent recs at most. | |
5854 | */ | |
6b240ff6 | 5855 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
492a8a33 TM |
5856 | |
5857 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5858 | &(*ref_tree)->rf_ci, | |
5859 | ref_root_bh, vb.vb_xv, | |
5860 | meta_add, credits); | |
5861 | if (ret) | |
5862 | mlog_errno(ret); | |
5863 | goto out; | |
5864 | } | |
5865 | ||
5866 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5867 | *ref_tree, ref_root_bh, 0, | |
5868 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5869 | if (ret) | |
5870 | mlog_errno(ret); | |
5871 | ||
5872 | out: | |
5873 | brelse(ref_root_bh); | |
5874 | return ret; | |
5875 | } | |
5876 | ||
0129241e TM |
5877 | /* |
5878 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5879 | * The physical clusters will be added to refcount tree. | |
5880 | */ | |
5881 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5882 | struct ocfs2_xattr_value_root *xv, | |
5883 | struct ocfs2_extent_tree *value_et, | |
5884 | struct ocfs2_caching_info *ref_ci, | |
5885 | struct buffer_head *ref_root_bh, | |
5886 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5887 | struct ocfs2_post_refcount *refcount) | |
5888 | { | |
5889 | int ret = 0; | |
5890 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5891 | u32 cpos, p_cluster, num_clusters; | |
5892 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5893 | unsigned int ext_flags; | |
5894 | ||
5895 | cpos = 0; | |
5896 | while (cpos < clusters) { | |
5897 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5898 | &num_clusters, el, &ext_flags); | |
5899 | ||
5900 | cpos += num_clusters; | |
5901 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5902 | continue; | |
5903 | ||
5904 | BUG_ON(!p_cluster); | |
5905 | ||
5906 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5907 | ref_ci, ref_root_bh, | |
5908 | cpos - num_clusters, | |
5909 | p_cluster, num_clusters, | |
5910 | dealloc, refcount); | |
5911 | if (ret) { | |
5912 | mlog_errno(ret); | |
5913 | break; | |
5914 | } | |
5915 | } | |
5916 | ||
5917 | return ret; | |
5918 | } | |
5919 | ||
5920 | /* | |
5921 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5922 | * have value stored outside. | |
5923 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5924 | */ | |
5925 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5926 | struct ocfs2_xattr_value_buf *vb, | |
5927 | struct ocfs2_xattr_header *header, | |
5928 | struct ocfs2_caching_info *ref_ci, | |
5929 | struct buffer_head *ref_root_bh, | |
5930 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5931 | { | |
5932 | ||
5933 | struct ocfs2_xattr_entry *xe; | |
5934 | struct ocfs2_xattr_value_root *xv; | |
5935 | struct ocfs2_extent_tree et; | |
5936 | int i, ret = 0; | |
5937 | ||
5938 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5939 | xe = &header->xh_entries[i]; | |
5940 | ||
5941 | if (ocfs2_xattr_is_local(xe)) | |
5942 | continue; | |
5943 | ||
5944 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5945 | le16_to_cpu(xe->xe_name_offset) + | |
5946 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5947 | ||
5948 | vb->vb_xv = xv; | |
5949 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5950 | ||
5951 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5952 | ref_ci, ref_root_bh, | |
5953 | dealloc, NULL); | |
5954 | if (ret) { | |
5955 | mlog_errno(ret); | |
5956 | break; | |
5957 | } | |
5958 | } | |
5959 | ||
5960 | return ret; | |
5961 | } | |
5962 | ||
5963 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5964 | struct buffer_head *fe_bh, | |
5965 | struct ocfs2_caching_info *ref_ci, | |
5966 | struct buffer_head *ref_root_bh, | |
5967 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5968 | { | |
5969 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5970 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5971 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5972 | le16_to_cpu(di->i_xattr_inline_size)); | |
5973 | struct ocfs2_xattr_value_buf vb = { | |
5974 | .vb_bh = fe_bh, | |
5975 | .vb_access = ocfs2_journal_access_di, | |
5976 | }; | |
5977 | ||
5978 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5979 | ref_ci, ref_root_bh, dealloc); | |
5980 | } | |
5981 | ||
5982 | struct ocfs2_xattr_tree_value_refcount_para { | |
5983 | struct ocfs2_caching_info *ref_ci; | |
5984 | struct buffer_head *ref_root_bh; | |
5985 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
5986 | }; | |
5987 | ||
5988 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
5989 | struct ocfs2_xattr_bucket *bucket, | |
5990 | int offset, | |
5991 | struct ocfs2_xattr_value_root **xv, | |
5992 | struct buffer_head **bh) | |
5993 | { | |
5994 | int ret, block_off, name_offset; | |
5995 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
5996 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
5997 | void *base; | |
5998 | ||
5999 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
6000 | bucket_xh(bucket), | |
6001 | offset, | |
6002 | &block_off, | |
6003 | &name_offset); | |
6004 | if (ret) { | |
6005 | mlog_errno(ret); | |
6006 | goto out; | |
6007 | } | |
6008 | ||
6009 | base = bucket_block(bucket, block_off); | |
6010 | ||
6011 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
6012 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6013 | ||
6014 | if (bh) | |
6015 | *bh = bucket->bu_bhs[block_off]; | |
6016 | out: | |
6017 | return ret; | |
6018 | } | |
6019 | ||
6020 | /* | |
6021 | * For a given xattr bucket, refcount all the entries which | |
6022 | * have value stored outside. | |
6023 | */ | |
6024 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
6025 | struct ocfs2_xattr_bucket *bucket, | |
6026 | void *para) | |
6027 | { | |
6028 | int i, ret = 0; | |
6029 | struct ocfs2_extent_tree et; | |
6030 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
6031 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
6032 | struct ocfs2_xattr_header *xh = | |
6033 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6034 | struct ocfs2_xattr_entry *xe; | |
6035 | struct ocfs2_xattr_value_buf vb = { | |
6036 | .vb_access = ocfs2_journal_access, | |
6037 | }; | |
6038 | struct ocfs2_post_refcount refcount = { | |
6039 | .credits = bucket->bu_blocks, | |
6040 | .para = bucket, | |
6041 | .func = ocfs2_xattr_bucket_post_refcount, | |
6042 | }; | |
6043 | struct ocfs2_post_refcount *p = NULL; | |
6044 | ||
6045 | /* We only need post_refcount if we support metaecc. */ | |
6046 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
6047 | p = &refcount; | |
6048 | ||
6049 | mlog(0, "refcount bucket %llu, count = %u\n", | |
6050 | (unsigned long long)bucket_blkno(bucket), | |
6051 | le16_to_cpu(xh->xh_count)); | |
6052 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6053 | xe = &xh->xh_entries[i]; | |
6054 | ||
6055 | if (ocfs2_xattr_is_local(xe)) | |
6056 | continue; | |
6057 | ||
6058 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
6059 | &vb.vb_xv, &vb.vb_bh); | |
6060 | if (ret) { | |
6061 | mlog_errno(ret); | |
6062 | break; | |
6063 | } | |
6064 | ||
6065 | ocfs2_init_xattr_value_extent_tree(&et, | |
6066 | INODE_CACHE(inode), &vb); | |
6067 | ||
6068 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
6069 | &et, ref->ref_ci, | |
6070 | ref->ref_root_bh, | |
6071 | ref->dealloc, p); | |
6072 | if (ret) { | |
6073 | mlog_errno(ret); | |
6074 | break; | |
6075 | } | |
6076 | } | |
6077 | ||
6078 | return ret; | |
6079 | ||
6080 | } | |
6081 | ||
6082 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
6083 | struct buffer_head *root_bh, | |
6084 | u64 blkno, u32 cpos, u32 len, void *para) | |
6085 | { | |
6086 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
6087 | ocfs2_xattr_bucket_value_refcount, | |
6088 | para); | |
6089 | } | |
6090 | ||
6091 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
6092 | struct buffer_head *blk_bh, | |
6093 | struct ocfs2_caching_info *ref_ci, | |
6094 | struct buffer_head *ref_root_bh, | |
6095 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6096 | { | |
6097 | int ret = 0; | |
6098 | struct ocfs2_xattr_block *xb = | |
6099 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6100 | ||
6101 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
6102 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
6103 | struct ocfs2_xattr_value_buf vb = { | |
6104 | .vb_bh = blk_bh, | |
6105 | .vb_access = ocfs2_journal_access_xb, | |
6106 | }; | |
6107 | ||
6108 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6109 | ref_ci, ref_root_bh, | |
6110 | dealloc); | |
6111 | } else { | |
6112 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
6113 | .ref_ci = ref_ci, | |
6114 | .ref_root_bh = ref_root_bh, | |
6115 | .dealloc = dealloc, | |
6116 | }; | |
6117 | ||
6118 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
6119 | ocfs2_refcount_xattr_tree_rec, | |
6120 | ¶); | |
6121 | } | |
6122 | ||
6123 | return ret; | |
6124 | } | |
6125 | ||
6126 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
6127 | struct buffer_head *fe_bh, | |
6128 | struct ocfs2_caching_info *ref_ci, | |
6129 | struct buffer_head *ref_root_bh, | |
6130 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6131 | { | |
6132 | int ret = 0; | |
6133 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
6134 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6135 | struct buffer_head *blk_bh = NULL; | |
6136 | ||
6137 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6138 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
6139 | ref_ci, ref_root_bh, | |
6140 | dealloc); | |
6141 | if (ret) { | |
6142 | mlog_errno(ret); | |
6143 | goto out; | |
6144 | } | |
6145 | } | |
6146 | ||
6147 | if (!di->i_xattr_loc) | |
6148 | goto out; | |
6149 | ||
6150 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
6151 | &blk_bh); | |
6152 | if (ret < 0) { | |
6153 | mlog_errno(ret); | |
6154 | goto out; | |
6155 | } | |
6156 | ||
6157 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
6158 | ref_root_bh, dealloc); | |
6159 | if (ret) | |
6160 | mlog_errno(ret); | |
6161 | ||
6162 | brelse(blk_bh); | |
6163 | out: | |
6164 | ||
6165 | return ret; | |
6166 | } | |
6167 | ||
0fe9b66c | 6168 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6169 | /* |
6170 | * Store the information we need in xattr reflink. | |
6171 | * old_bh and new_bh are inode bh for the old and new inode. | |
6172 | */ | |
6173 | struct ocfs2_xattr_reflink { | |
6174 | struct inode *old_inode; | |
6175 | struct inode *new_inode; | |
6176 | struct buffer_head *old_bh; | |
6177 | struct buffer_head *new_bh; | |
6178 | struct ocfs2_caching_info *ref_ci; | |
6179 | struct buffer_head *ref_root_bh; | |
6180 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6181 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6182 | }; |
6183 | ||
6184 | /* | |
6185 | * Given a xattr header and xe offset, | |
6186 | * return the proper xv and the corresponding bh. | |
6187 | * xattr in inode, block and xattr tree have different implementaions. | |
6188 | */ | |
6189 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6190 | struct buffer_head *bh, | |
6191 | struct ocfs2_xattr_header *xh, | |
6192 | int offset, | |
6193 | struct ocfs2_xattr_value_root **xv, | |
6194 | struct buffer_head **ret_bh, | |
6195 | void *para); | |
6196 | ||
6197 | /* | |
6198 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6199 | * credits we need if we create them from the scratch. | |
6200 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6201 | */ | |
6202 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6203 | struct buffer_head *bh, | |
6204 | struct ocfs2_xattr_header *xh, | |
6205 | int *metas, int *credits, | |
6206 | int *num_recs, | |
6207 | get_xattr_value_root *func, | |
6208 | void *para) | |
6209 | { | |
6210 | int i, ret = 0; | |
6211 | struct ocfs2_xattr_value_root *xv; | |
6212 | struct ocfs2_xattr_entry *xe; | |
6213 | ||
6214 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6215 | xe = &xh->xh_entries[i]; | |
6216 | if (ocfs2_xattr_is_local(xe)) | |
6217 | continue; | |
6218 | ||
6219 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6220 | if (ret) { | |
6221 | mlog_errno(ret); | |
6222 | break; | |
6223 | } | |
6224 | ||
6225 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6226 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6227 | ||
6228 | *credits += ocfs2_calc_extend_credits(sb, | |
6229 | &def_xv.xv.xr_list, | |
6230 | le32_to_cpu(xv->xr_clusters)); | |
6231 | ||
6232 | /* | |
6233 | * If the value is a tree with depth > 1, We don't go deep | |
6234 | * to the extent block, so just calculate a maximum record num. | |
6235 | */ | |
6236 | if (!xv->xr_list.l_tree_depth) | |
8ff6af88 | 6237 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
2999d12f TM |
6238 | else |
6239 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6240 | XATTR_SIZE_MAX); | |
6241 | } | |
6242 | ||
6243 | return ret; | |
6244 | } | |
6245 | ||
6246 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6247 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6248 | struct buffer_head *bh, | |
6249 | struct ocfs2_xattr_header *xh, | |
6250 | int offset, | |
6251 | struct ocfs2_xattr_value_root **xv, | |
6252 | struct buffer_head **ret_bh, | |
6253 | void *para) | |
6254 | { | |
6255 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6256 | ||
6257 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6258 | le16_to_cpu(xe->xe_name_offset) + | |
6259 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6260 | ||
6261 | if (ret_bh) | |
6262 | *ret_bh = bh; | |
6263 | ||
6264 | return 0; | |
6265 | } | |
6266 | ||
6267 | /* | |
6268 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6269 | * It is only used for inline xattr and xattr block. | |
6270 | */ | |
6271 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6272 | struct ocfs2_xattr_header *xh, | |
6273 | struct buffer_head *ref_root_bh, | |
6274 | int *credits, | |
6275 | struct ocfs2_alloc_context **meta_ac) | |
6276 | { | |
6277 | int ret, meta_add = 0, num_recs = 0; | |
6278 | struct ocfs2_refcount_block *rb = | |
6279 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6280 | ||
6281 | *credits = 0; | |
6282 | ||
6283 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6284 | &meta_add, credits, &num_recs, | |
6285 | ocfs2_get_xattr_value_root, | |
6286 | NULL); | |
6287 | if (ret) { | |
6288 | mlog_errno(ret); | |
6289 | goto out; | |
6290 | } | |
6291 | ||
6292 | /* | |
6293 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6294 | * an approximate number we need for refcount tree change. | |
6295 | * Sometimes we need to split the tree, and after split, half recs | |
6296 | * will be moved to the new block, and a new block can only provide | |
6297 | * half number of recs. So we multiple new blocks by 2. | |
6298 | */ | |
6299 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6300 | meta_add += num_recs; | |
6301 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6302 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6303 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6304 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6305 | else | |
6306 | *credits += 1; | |
6307 | ||
6308 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6309 | if (ret) | |
6310 | mlog_errno(ret); | |
6311 | ||
6312 | out: | |
6313 | return ret; | |
6314 | } | |
6315 | ||
6316 | /* | |
6317 | * Given a xattr header, reflink all the xattrs in this container. | |
6318 | * It can be used for inode, block and bucket. | |
6319 | * | |
6320 | * NOTE: | |
6321 | * Before we call this function, the caller has memcpy the xattr in | |
6322 | * old_xh to the new_xh. | |
0fe9b66c TM |
6323 | * |
6324 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6325 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6326 | */ |
6327 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6328 | struct ocfs2_xattr_reflink *args, | |
6329 | struct buffer_head *old_bh, | |
6330 | struct ocfs2_xattr_header *xh, | |
6331 | struct buffer_head *new_bh, | |
6332 | struct ocfs2_xattr_header *new_xh, | |
6333 | struct ocfs2_xattr_value_buf *vb, | |
6334 | struct ocfs2_alloc_context *meta_ac, | |
6335 | get_xattr_value_root *func, | |
6336 | void *para) | |
6337 | { | |
0fe9b66c | 6338 | int ret = 0, i, j; |
2999d12f TM |
6339 | struct super_block *sb = args->old_inode->i_sb; |
6340 | struct buffer_head *value_bh; | |
0fe9b66c | 6341 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6342 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6343 | struct ocfs2_extent_tree data_et; | |
6344 | u32 clusters, cpos, p_cluster, num_clusters; | |
6345 | unsigned int ext_flags = 0; | |
6346 | ||
6347 | mlog(0, "reflink xattr in container %llu, count = %u\n", | |
6348 | (unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6349 | |
6350 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6351 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6352 | xe = &xh->xh_entries[i]; |
6353 | ||
0fe9b66c TM |
6354 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6355 | xe = &new_xh->xh_entries[j]; | |
6356 | ||
6357 | le16_add_cpu(&new_xh->xh_count, -1); | |
6358 | if (new_xh->xh_count) { | |
6359 | memmove(xe, xe + 1, | |
6360 | (void *)last - (void *)xe); | |
6361 | memset(last, 0, | |
6362 | sizeof(struct ocfs2_xattr_entry)); | |
6363 | } | |
6364 | ||
6365 | /* | |
6366 | * We don't want j to increase in the next round since | |
6367 | * it is already moved ahead. | |
6368 | */ | |
6369 | j--; | |
6370 | continue; | |
6371 | } | |
6372 | ||
2999d12f TM |
6373 | if (ocfs2_xattr_is_local(xe)) |
6374 | continue; | |
6375 | ||
6376 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6377 | if (ret) { | |
6378 | mlog_errno(ret); | |
6379 | break; | |
6380 | } | |
6381 | ||
0fe9b66c | 6382 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6383 | if (ret) { |
6384 | mlog_errno(ret); | |
6385 | break; | |
6386 | } | |
6387 | ||
6388 | /* | |
6389 | * For the xattr which has l_tree_depth = 0, all the extent | |
6390 | * recs have already be copied to the new xh with the | |
6391 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6392 | * increase the refount count int the refcount tree. | |
6393 | * | |
6394 | * For the xattr which has l_tree_depth > 0, we need | |
6395 | * to initialize it to the empty default value root, | |
6396 | * and then insert the extents one by one. | |
6397 | */ | |
6398 | if (xv->xr_list.l_tree_depth) { | |
6399 | memcpy(new_xv, &def_xv, sizeof(def_xv)); | |
6400 | vb->vb_xv = new_xv; | |
6401 | vb->vb_bh = value_bh; | |
6402 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6403 | INODE_CACHE(args->new_inode), vb); | |
6404 | } | |
6405 | ||
6406 | clusters = le32_to_cpu(xv->xr_clusters); | |
6407 | cpos = 0; | |
6408 | while (cpos < clusters) { | |
6409 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6410 | cpos, | |
6411 | &p_cluster, | |
6412 | &num_clusters, | |
6413 | &xv->xr_list, | |
6414 | &ext_flags); | |
6415 | if (ret) { | |
6416 | mlog_errno(ret); | |
6417 | goto out; | |
6418 | } | |
6419 | ||
6420 | BUG_ON(!p_cluster); | |
6421 | ||
6422 | if (xv->xr_list.l_tree_depth) { | |
6423 | ret = ocfs2_insert_extent(handle, | |
6424 | &data_et, cpos, | |
6425 | ocfs2_clusters_to_blocks( | |
6426 | args->old_inode->i_sb, | |
6427 | p_cluster), | |
6428 | num_clusters, ext_flags, | |
6429 | meta_ac); | |
6430 | if (ret) { | |
6431 | mlog_errno(ret); | |
6432 | goto out; | |
6433 | } | |
6434 | } | |
6435 | ||
6436 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6437 | args->ref_root_bh, | |
6438 | p_cluster, num_clusters, | |
6439 | meta_ac, args->dealloc); | |
6440 | if (ret) { | |
6441 | mlog_errno(ret); | |
6442 | goto out; | |
6443 | } | |
6444 | ||
6445 | cpos += num_clusters; | |
6446 | } | |
6447 | } | |
6448 | ||
6449 | out: | |
6450 | return ret; | |
6451 | } | |
6452 | ||
6453 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6454 | { | |
6455 | int ret = 0, credits = 0; | |
6456 | handle_t *handle; | |
6457 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6458 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6459 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6460 | int header_off = osb->sb->s_blocksize - inline_size; | |
6461 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6462 | (args->old_bh->b_data + header_off); | |
6463 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6464 | (args->new_bh->b_data + header_off); | |
6465 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6466 | struct ocfs2_inode_info *new_oi; | |
6467 | struct ocfs2_dinode *new_di; | |
6468 | struct ocfs2_xattr_value_buf vb = { | |
6469 | .vb_bh = args->new_bh, | |
6470 | .vb_access = ocfs2_journal_access_di, | |
6471 | }; | |
6472 | ||
6473 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6474 | &credits, &meta_ac); | |
6475 | if (ret) { | |
6476 | mlog_errno(ret); | |
6477 | goto out; | |
6478 | } | |
6479 | ||
6480 | handle = ocfs2_start_trans(osb, credits); | |
6481 | if (IS_ERR(handle)) { | |
6482 | ret = PTR_ERR(handle); | |
6483 | mlog_errno(ret); | |
6484 | goto out; | |
6485 | } | |
6486 | ||
6487 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6488 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6489 | if (ret) { | |
6490 | mlog_errno(ret); | |
6491 | goto out_commit; | |
6492 | } | |
6493 | ||
6494 | memcpy(args->new_bh->b_data + header_off, | |
6495 | args->old_bh->b_data + header_off, inline_size); | |
6496 | ||
6497 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6498 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6499 | ||
6500 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6501 | args->new_bh, new_xh, &vb, meta_ac, | |
6502 | ocfs2_get_xattr_value_root, NULL); | |
6503 | if (ret) { | |
6504 | mlog_errno(ret); | |
6505 | goto out_commit; | |
6506 | } | |
6507 | ||
6508 | new_oi = OCFS2_I(args->new_inode); | |
6509 | spin_lock(&new_oi->ip_lock); | |
6510 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6511 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6512 | spin_unlock(&new_oi->ip_lock); | |
6513 | ||
6514 | ocfs2_journal_dirty(handle, args->new_bh); | |
6515 | ||
6516 | out_commit: | |
6517 | ocfs2_commit_trans(osb, handle); | |
6518 | ||
6519 | out: | |
6520 | if (meta_ac) | |
6521 | ocfs2_free_alloc_context(meta_ac); | |
6522 | return ret; | |
6523 | } | |
6524 | ||
6525 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6526 | struct buffer_head *fe_bh, | |
6527 | struct buffer_head **ret_bh, | |
6528 | int indexed) | |
6529 | { | |
6530 | int ret; | |
2999d12f TM |
6531 | struct ocfs2_alloc_context *meta_ac; |
6532 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
d3981544 JB |
6533 | struct ocfs2_xattr_set_ctxt ctxt = { |
6534 | .meta_ac = meta_ac, | |
6535 | }; | |
2999d12f TM |
6536 | |
6537 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
6538 | if (ret < 0) { | |
6539 | mlog_errno(ret); | |
6540 | return ret; | |
6541 | } | |
6542 | ||
d3981544 JB |
6543 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); |
6544 | if (IS_ERR(ctxt.handle)) { | |
6545 | ret = PTR_ERR(ctxt.handle); | |
2999d12f TM |
6546 | mlog_errno(ret); |
6547 | goto out; | |
6548 | } | |
6549 | ||
6550 | mlog(0, "create new xattr block for inode %llu, index = %d\n", | |
6551 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
d3981544 JB |
6552 | ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed, |
6553 | ret_bh); | |
2999d12f TM |
6554 | if (ret) |
6555 | mlog_errno(ret); | |
6556 | ||
d3981544 | 6557 | ocfs2_commit_trans(osb, ctxt.handle); |
2999d12f TM |
6558 | out: |
6559 | ocfs2_free_alloc_context(meta_ac); | |
6560 | return ret; | |
6561 | } | |
6562 | ||
6563 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6564 | struct buffer_head *blk_bh, | |
6565 | struct buffer_head *new_blk_bh) | |
6566 | { | |
6567 | int ret = 0, credits = 0; | |
6568 | handle_t *handle; | |
6569 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6570 | struct ocfs2_dinode *new_di; | |
6571 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6572 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6573 | struct ocfs2_xattr_block *xb = | |
6574 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6575 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6576 | struct ocfs2_xattr_block *new_xb = | |
6577 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6578 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6579 | struct ocfs2_alloc_context *meta_ac; | |
6580 | struct ocfs2_xattr_value_buf vb = { | |
6581 | .vb_bh = new_blk_bh, | |
6582 | .vb_access = ocfs2_journal_access_xb, | |
6583 | }; | |
6584 | ||
6585 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6586 | &credits, &meta_ac); | |
6587 | if (ret) { | |
6588 | mlog_errno(ret); | |
6589 | return ret; | |
6590 | } | |
6591 | ||
6592 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6593 | handle = ocfs2_start_trans(osb, credits + 1); | |
6594 | if (IS_ERR(handle)) { | |
6595 | ret = PTR_ERR(handle); | |
6596 | mlog_errno(ret); | |
6597 | goto out; | |
6598 | } | |
6599 | ||
6600 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6601 | ret = ocfs2_journal_access_di(handle, | |
6602 | INODE_CACHE(args->new_inode), | |
6603 | args->new_bh, | |
6604 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6605 | if (ret) { | |
6606 | mlog_errno(ret); | |
6607 | goto out_commit; | |
6608 | } | |
6609 | } | |
6610 | ||
6611 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6612 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6613 | if (ret) { | |
6614 | mlog_errno(ret); | |
6615 | goto out_commit; | |
6616 | } | |
6617 | ||
6618 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6619 | osb->sb->s_blocksize - header_off); | |
6620 | ||
6621 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6622 | new_blk_bh, new_xh, &vb, meta_ac, | |
6623 | ocfs2_get_xattr_value_root, NULL); | |
6624 | if (ret) { | |
6625 | mlog_errno(ret); | |
6626 | goto out_commit; | |
6627 | } | |
6628 | ||
6629 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6630 | ||
6631 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6632 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6633 | spin_lock(&new_oi->ip_lock); | |
6634 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6635 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6636 | spin_unlock(&new_oi->ip_lock); | |
6637 | ||
6638 | ocfs2_journal_dirty(handle, args->new_bh); | |
6639 | } | |
6640 | ||
6641 | out_commit: | |
6642 | ocfs2_commit_trans(osb, handle); | |
6643 | ||
6644 | out: | |
6645 | ocfs2_free_alloc_context(meta_ac); | |
6646 | return ret; | |
6647 | } | |
6648 | ||
6649 | struct ocfs2_reflink_xattr_tree_args { | |
6650 | struct ocfs2_xattr_reflink *reflink; | |
6651 | struct buffer_head *old_blk_bh; | |
6652 | struct buffer_head *new_blk_bh; | |
6653 | struct ocfs2_xattr_bucket *old_bucket; | |
6654 | struct ocfs2_xattr_bucket *new_bucket; | |
6655 | }; | |
6656 | ||
6657 | /* | |
6658 | * NOTE: | |
6659 | * We have to handle the case that both old bucket and new bucket | |
6660 | * will call this function to get the right ret_bh. | |
6661 | * So The caller must give us the right bh. | |
6662 | */ | |
6663 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6664 | struct buffer_head *bh, | |
6665 | struct ocfs2_xattr_header *xh, | |
6666 | int offset, | |
6667 | struct ocfs2_xattr_value_root **xv, | |
6668 | struct buffer_head **ret_bh, | |
6669 | void *para) | |
6670 | { | |
6671 | struct ocfs2_reflink_xattr_tree_args *args = | |
6672 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6673 | struct ocfs2_xattr_bucket *bucket; | |
6674 | ||
6675 | if (bh == args->old_bucket->bu_bhs[0]) | |
6676 | bucket = args->old_bucket; | |
6677 | else | |
6678 | bucket = args->new_bucket; | |
6679 | ||
6680 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6681 | xv, ret_bh); | |
6682 | } | |
6683 | ||
6684 | struct ocfs2_value_tree_metas { | |
6685 | int num_metas; | |
6686 | int credits; | |
6687 | int num_recs; | |
6688 | }; | |
6689 | ||
6690 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6691 | struct buffer_head *bh, | |
6692 | struct ocfs2_xattr_header *xh, | |
6693 | int offset, | |
6694 | struct ocfs2_xattr_value_root **xv, | |
6695 | struct buffer_head **ret_bh, | |
6696 | void *para) | |
6697 | { | |
6698 | struct ocfs2_xattr_bucket *bucket = | |
6699 | (struct ocfs2_xattr_bucket *)para; | |
6700 | ||
6701 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6702 | xv, ret_bh); | |
6703 | } | |
6704 | ||
6705 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6706 | struct ocfs2_xattr_bucket *bucket, | |
6707 | void *para) | |
6708 | { | |
6709 | struct ocfs2_value_tree_metas *metas = | |
6710 | (struct ocfs2_value_tree_metas *)para; | |
6711 | struct ocfs2_xattr_header *xh = | |
6712 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6713 | ||
6714 | /* Add the credits for this bucket first. */ | |
6715 | metas->credits += bucket->bu_blocks; | |
6716 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6717 | xh, &metas->num_metas, | |
6718 | &metas->credits, &metas->num_recs, | |
6719 | ocfs2_value_tree_metas_in_bucket, | |
6720 | bucket); | |
6721 | } | |
6722 | ||
6723 | /* | |
6724 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6725 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6726 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6727 | */ | |
6728 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6729 | struct ocfs2_reflink_xattr_tree_args *args, | |
6730 | struct ocfs2_extent_tree *xt_et, | |
6731 | u64 blkno, u32 len, int *credits, | |
6732 | struct ocfs2_alloc_context **meta_ac, | |
6733 | struct ocfs2_alloc_context **data_ac) | |
6734 | { | |
6735 | int ret, num_free_extents; | |
6736 | struct ocfs2_value_tree_metas metas; | |
6737 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6738 | struct ocfs2_refcount_block *rb; | |
6739 | ||
6740 | memset(&metas, 0, sizeof(metas)); | |
6741 | ||
6742 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6743 | ocfs2_calc_value_tree_metas, &metas); | |
6744 | if (ret) { | |
6745 | mlog_errno(ret); | |
6746 | goto out; | |
6747 | } | |
6748 | ||
6749 | *credits = metas.credits; | |
6750 | ||
6751 | /* | |
6752 | * Calculate we need for refcount tree change. | |
6753 | * | |
6754 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6755 | * an approximate number we need for refcount tree change. | |
6756 | * Sometimes we need to split the tree, and after split, half recs | |
6757 | * will be moved to the new block, and a new block can only provide | |
6758 | * half number of recs. So we multiple new blocks by 2. | |
6759 | * In the end, we have to add credits for modifying the already | |
6760 | * existed refcount block. | |
6761 | */ | |
6762 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6763 | metas.num_recs = | |
6764 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6765 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6766 | metas.num_metas += metas.num_recs; | |
6767 | *credits += metas.num_recs + | |
6768 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6769 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6770 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6771 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6772 | else | |
6773 | *credits += 1; | |
6774 | ||
6775 | /* count in the xattr tree change. */ | |
6776 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); | |
6777 | if (num_free_extents < 0) { | |
6778 | ret = num_free_extents; | |
6779 | mlog_errno(ret); | |
6780 | goto out; | |
6781 | } | |
6782 | ||
6783 | if (num_free_extents < len) | |
6784 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6785 | ||
6786 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
6787 | xt_et->et_root_el, len); | |
6788 | ||
6789 | if (metas.num_metas) { | |
6790 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6791 | meta_ac); | |
6792 | if (ret) { | |
6793 | mlog_errno(ret); | |
6794 | goto out; | |
6795 | } | |
6796 | } | |
6797 | ||
6798 | if (len) { | |
6799 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6800 | if (ret) | |
6801 | mlog_errno(ret); | |
6802 | } | |
6803 | out: | |
6804 | if (ret) { | |
6805 | if (*meta_ac) { | |
6806 | ocfs2_free_alloc_context(*meta_ac); | |
6807 | meta_ac = NULL; | |
6808 | } | |
6809 | } | |
6810 | ||
6811 | return ret; | |
6812 | } | |
6813 | ||
6814 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6815 | u64 blkno, u64 new_blkno, u32 clusters, | |
6816 | struct ocfs2_alloc_context *meta_ac, | |
6817 | struct ocfs2_alloc_context *data_ac, | |
6818 | struct ocfs2_reflink_xattr_tree_args *args) | |
6819 | { | |
6820 | int i, j, ret = 0; | |
6821 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
6822 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
6823 | u32 num_buckets = clusters * bpc; | |
6824 | int bpb = args->old_bucket->bu_blocks; | |
6825 | struct ocfs2_xattr_value_buf vb = { | |
6826 | .vb_access = ocfs2_journal_access, | |
6827 | }; | |
6828 | ||
6829 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6830 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6831 | if (ret) { | |
6832 | mlog_errno(ret); | |
6833 | break; | |
6834 | } | |
6835 | ||
6836 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno); | |
6837 | if (ret) { | |
6838 | mlog_errno(ret); | |
6839 | break; | |
6840 | } | |
6841 | ||
6842 | /* | |
6843 | * The real bucket num in this series of blocks is stored | |
6844 | * in the 1st bucket. | |
6845 | */ | |
6846 | if (i == 0) | |
6847 | num_buckets = le16_to_cpu( | |
6848 | bucket_xh(args->old_bucket)->xh_num_buckets); | |
6849 | ||
6850 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6851 | args->new_bucket, | |
6852 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6853 | if (ret) { | |
6854 | mlog_errno(ret); | |
6855 | break; | |
6856 | } | |
6857 | ||
6858 | for (j = 0; j < bpb; j++) | |
6859 | memcpy(bucket_block(args->new_bucket, j), | |
6860 | bucket_block(args->old_bucket, j), | |
6861 | sb->s_blocksize); | |
6862 | ||
6863 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6864 | ||
6865 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6866 | args->old_bucket->bu_bhs[0], | |
6867 | bucket_xh(args->old_bucket), | |
6868 | args->new_bucket->bu_bhs[0], | |
6869 | bucket_xh(args->new_bucket), | |
6870 | &vb, meta_ac, | |
6871 | ocfs2_get_reflink_xattr_value_root, | |
6872 | args); | |
6873 | if (ret) { | |
6874 | mlog_errno(ret); | |
6875 | break; | |
6876 | } | |
6877 | ||
6878 | /* | |
6879 | * Re-access and dirty the bucket to calculate metaecc. | |
6880 | * Because we may extend the transaction in reflink_xattr_header | |
6881 | * which will let the already accessed block gone. | |
6882 | */ | |
6883 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6884 | args->new_bucket, | |
6885 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6886 | if (ret) { | |
6887 | mlog_errno(ret); | |
6888 | break; | |
6889 | } | |
6890 | ||
6891 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6892 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6893 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6894 | } | |
6895 | ||
6896 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6897 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6898 | return ret; | |
6899 | } | |
6900 | /* | |
6901 | * Create the same xattr extent record in the new inode's xattr tree. | |
6902 | */ | |
6903 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6904 | struct buffer_head *root_bh, | |
6905 | u64 blkno, | |
6906 | u32 cpos, | |
6907 | u32 len, | |
6908 | void *para) | |
6909 | { | |
6910 | int ret, credits = 0; | |
6911 | u32 p_cluster, num_clusters; | |
6912 | u64 new_blkno; | |
6913 | handle_t *handle; | |
6914 | struct ocfs2_reflink_xattr_tree_args *args = | |
6915 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6916 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6917 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6918 | struct ocfs2_alloc_context *data_ac = NULL; | |
6919 | struct ocfs2_extent_tree et; | |
6920 | ||
6921 | ocfs2_init_xattr_tree_extent_tree(&et, | |
6922 | INODE_CACHE(args->reflink->new_inode), | |
6923 | args->new_blk_bh); | |
6924 | ||
6925 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
6926 | len, &credits, | |
6927 | &meta_ac, &data_ac); | |
6928 | if (ret) { | |
6929 | mlog_errno(ret); | |
6930 | goto out; | |
6931 | } | |
6932 | ||
6933 | handle = ocfs2_start_trans(osb, credits); | |
6934 | if (IS_ERR(handle)) { | |
6935 | ret = PTR_ERR(handle); | |
6936 | mlog_errno(ret); | |
6937 | goto out; | |
6938 | } | |
6939 | ||
6940 | ret = ocfs2_claim_clusters(osb, handle, data_ac, | |
6941 | len, &p_cluster, &num_clusters); | |
6942 | if (ret) { | |
6943 | mlog_errno(ret); | |
6944 | goto out_commit; | |
6945 | } | |
6946 | ||
6947 | new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster); | |
6948 | ||
6949 | mlog(0, "reflink xattr buckets %llu to %llu, len %u\n", | |
6950 | (unsigned long long)blkno, (unsigned long long)new_blkno, len); | |
6951 | ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len, | |
6952 | meta_ac, data_ac, args); | |
6953 | if (ret) { | |
6954 | mlog_errno(ret); | |
6955 | goto out_commit; | |
6956 | } | |
6957 | ||
6958 | mlog(0, "insert new xattr extent rec start %llu len %u to %u\n", | |
6959 | (unsigned long long)new_blkno, len, cpos); | |
6960 | ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno, | |
6961 | len, 0, meta_ac); | |
6962 | if (ret) | |
6963 | mlog_errno(ret); | |
6964 | ||
6965 | out_commit: | |
6966 | ocfs2_commit_trans(osb, handle); | |
6967 | ||
6968 | out: | |
6969 | if (meta_ac) | |
6970 | ocfs2_free_alloc_context(meta_ac); | |
6971 | if (data_ac) | |
6972 | ocfs2_free_alloc_context(data_ac); | |
6973 | return ret; | |
6974 | } | |
6975 | ||
6976 | /* | |
6977 | * Create reflinked xattr buckets. | |
6978 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
6979 | * if they are stored outside. | |
6980 | */ | |
6981 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
6982 | struct buffer_head *blk_bh, | |
6983 | struct buffer_head *new_blk_bh) | |
6984 | { | |
6985 | int ret; | |
6986 | struct ocfs2_reflink_xattr_tree_args para; | |
6987 | ||
6988 | memset(¶, 0, sizeof(para)); | |
6989 | para.reflink = args; | |
6990 | para.old_blk_bh = blk_bh; | |
6991 | para.new_blk_bh = new_blk_bh; | |
6992 | ||
6993 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
6994 | if (!para.old_bucket) { | |
6995 | mlog_errno(-ENOMEM); | |
6996 | return -ENOMEM; | |
6997 | } | |
6998 | ||
6999 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
7000 | if (!para.new_bucket) { | |
7001 | ret = -ENOMEM; | |
7002 | mlog_errno(ret); | |
7003 | goto out; | |
7004 | } | |
7005 | ||
7006 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
7007 | ocfs2_reflink_xattr_rec, | |
7008 | ¶); | |
7009 | if (ret) | |
7010 | mlog_errno(ret); | |
7011 | ||
7012 | out: | |
7013 | ocfs2_xattr_bucket_free(para.old_bucket); | |
7014 | ocfs2_xattr_bucket_free(para.new_bucket); | |
7015 | return ret; | |
7016 | } | |
7017 | ||
7018 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
7019 | struct buffer_head *blk_bh) | |
7020 | { | |
7021 | int ret, indexed = 0; | |
7022 | struct buffer_head *new_blk_bh = NULL; | |
7023 | struct ocfs2_xattr_block *xb = | |
7024 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
7025 | ||
7026 | ||
7027 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
7028 | indexed = 1; | |
7029 | ||
7030 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
7031 | &new_blk_bh, indexed); | |
7032 | if (ret) { | |
7033 | mlog_errno(ret); | |
7034 | goto out; | |
7035 | } | |
7036 | ||
7037 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) | |
7038 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); | |
7039 | else | |
7040 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
7041 | if (ret) | |
7042 | mlog_errno(ret); | |
7043 | ||
7044 | out: | |
7045 | brelse(new_blk_bh); | |
7046 | return ret; | |
7047 | } | |
7048 | ||
0fe9b66c TM |
7049 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
7050 | { | |
7051 | int type = ocfs2_xattr_get_type(xe); | |
7052 | ||
7053 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
7054 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
7055 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
7056 | } | |
7057 | ||
2999d12f TM |
7058 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
7059 | struct buffer_head *old_bh, | |
7060 | struct inode *new_inode, | |
0fe9b66c TM |
7061 | struct buffer_head *new_bh, |
7062 | bool preserve_security) | |
2999d12f TM |
7063 | { |
7064 | int ret; | |
7065 | struct ocfs2_xattr_reflink args; | |
7066 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
7067 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
7068 | struct buffer_head *blk_bh = NULL; | |
7069 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
7070 | struct ocfs2_refcount_tree *ref_tree; | |
7071 | struct buffer_head *ref_root_bh = NULL; | |
7072 | ||
7073 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7074 | le64_to_cpu(di->i_refcount_loc), | |
7075 | 1, &ref_tree, &ref_root_bh); | |
7076 | if (ret) { | |
7077 | mlog_errno(ret); | |
7078 | goto out; | |
7079 | } | |
7080 | ||
7081 | ocfs2_init_dealloc_ctxt(&dealloc); | |
7082 | ||
7083 | args.old_inode = old_inode; | |
7084 | args.new_inode = new_inode; | |
7085 | args.old_bh = old_bh; | |
7086 | args.new_bh = new_bh; | |
7087 | args.ref_ci = &ref_tree->rf_ci; | |
7088 | args.ref_root_bh = ref_root_bh; | |
7089 | args.dealloc = &dealloc; | |
0fe9b66c TM |
7090 | if (preserve_security) |
7091 | args.xattr_reflinked = NULL; | |
7092 | else | |
7093 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
7094 | |
7095 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
7096 | ret = ocfs2_reflink_xattr_inline(&args); | |
7097 | if (ret) { | |
7098 | mlog_errno(ret); | |
7099 | goto out_unlock; | |
7100 | } | |
7101 | } | |
7102 | ||
7103 | if (!di->i_xattr_loc) | |
7104 | goto out_unlock; | |
7105 | ||
7106 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
7107 | &blk_bh); | |
7108 | if (ret < 0) { | |
7109 | mlog_errno(ret); | |
7110 | goto out_unlock; | |
7111 | } | |
7112 | ||
7113 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
7114 | if (ret) | |
7115 | mlog_errno(ret); | |
7116 | ||
7117 | brelse(blk_bh); | |
7118 | ||
7119 | out_unlock: | |
7120 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7121 | ref_tree, 1); | |
7122 | brelse(ref_root_bh); | |
7123 | ||
7124 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
7125 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
7126 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
7127 | } | |
7128 | ||
7129 | out: | |
7130 | return ret; | |
7131 | } | |
7132 | ||
0fe9b66c TM |
7133 | /* |
7134 | * Initialize security and acl for a already created inode. | |
7135 | * Used for reflink a non-preserve-security file. | |
7136 | * | |
7137 | * It uses common api like ocfs2_xattr_set, so the caller | |
7138 | * must not hold any lock expect i_mutex. | |
7139 | */ | |
7140 | int ocfs2_init_security_and_acl(struct inode *dir, | |
7141 | struct inode *inode) | |
7142 | { | |
7143 | int ret = 0; | |
7144 | struct buffer_head *dir_bh = NULL; | |
7145 | struct ocfs2_security_xattr_info si = { | |
7146 | .enable = 1, | |
7147 | }; | |
7148 | ||
7149 | ret = ocfs2_init_security_get(inode, dir, &si); | |
7150 | if (!ret) { | |
431547b3 CH |
7151 | ret = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, |
7152 | si.name, si.value, si.value_len, | |
7153 | XATTR_CREATE); | |
0fe9b66c TM |
7154 | if (ret) { |
7155 | mlog_errno(ret); | |
7156 | goto leave; | |
7157 | } | |
7158 | } else if (ret != -EOPNOTSUPP) { | |
7159 | mlog_errno(ret); | |
7160 | goto leave; | |
7161 | } | |
7162 | ||
7163 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
7164 | if (ret) { | |
7165 | mlog_errno(ret); | |
7166 | goto leave; | |
7167 | } | |
7168 | ||
7169 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); | |
7170 | if (ret) | |
7171 | mlog_errno(ret); | |
7172 | ||
7173 | ocfs2_inode_unlock(dir, 0); | |
7174 | brelse(dir_bh); | |
7175 | leave: | |
7176 | return ret; | |
7177 | } | |
923f7f31 TY |
7178 | /* |
7179 | * 'security' attributes support | |
7180 | */ | |
431547b3 | 7181 | static size_t ocfs2_xattr_security_list(struct dentry *dentry, char *list, |
923f7f31 | 7182 | size_t list_size, const char *name, |
431547b3 | 7183 | size_t name_len, int type) |
923f7f31 TY |
7184 | { |
7185 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
7186 | const size_t total_len = prefix_len + name_len + 1; | |
7187 | ||
7188 | if (list && total_len <= list_size) { | |
7189 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
7190 | memcpy(list + prefix_len, name, name_len); | |
7191 | list[prefix_len + name_len] = '\0'; | |
7192 | } | |
7193 | return total_len; | |
7194 | } | |
7195 | ||
431547b3 CH |
7196 | static int ocfs2_xattr_security_get(struct dentry *dentry, const char *name, |
7197 | void *buffer, size_t size, int type) | |
923f7f31 TY |
7198 | { |
7199 | if (strcmp(name, "") == 0) | |
7200 | return -EINVAL; | |
431547b3 CH |
7201 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
7202 | name, buffer, size); | |
923f7f31 TY |
7203 | } |
7204 | ||
431547b3 CH |
7205 | static int ocfs2_xattr_security_set(struct dentry *dentry, const char *name, |
7206 | const void *value, size_t size, int flags, int type) | |
923f7f31 TY |
7207 | { |
7208 | if (strcmp(name, "") == 0) | |
7209 | return -EINVAL; | |
7210 | ||
431547b3 CH |
7211 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
7212 | name, value, size, flags); | |
923f7f31 TY |
7213 | } |
7214 | ||
534eaddd TY |
7215 | int ocfs2_init_security_get(struct inode *inode, |
7216 | struct inode *dir, | |
7217 | struct ocfs2_security_xattr_info *si) | |
7218 | { | |
38d59ef6 TY |
7219 | /* check whether ocfs2 support feature xattr */ |
7220 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7221 | return -EOPNOTSUPP; | |
534eaddd TY |
7222 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
7223 | &si->value_len); | |
7224 | } | |
7225 | ||
7226 | int ocfs2_init_security_set(handle_t *handle, | |
7227 | struct inode *inode, | |
7228 | struct buffer_head *di_bh, | |
7229 | struct ocfs2_security_xattr_info *si, | |
7230 | struct ocfs2_alloc_context *xattr_ac, | |
7231 | struct ocfs2_alloc_context *data_ac) | |
7232 | { | |
7233 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7234 | OCFS2_XATTR_INDEX_SECURITY, | |
7235 | si->name, si->value, si->value_len, 0, | |
7236 | xattr_ac, data_ac); | |
7237 | } | |
7238 | ||
923f7f31 TY |
7239 | struct xattr_handler ocfs2_xattr_security_handler = { |
7240 | .prefix = XATTR_SECURITY_PREFIX, | |
7241 | .list = ocfs2_xattr_security_list, | |
7242 | .get = ocfs2_xattr_security_get, | |
7243 | .set = ocfs2_xattr_security_set, | |
7244 | }; | |
7245 | ||
99219aea MF |
7246 | /* |
7247 | * 'trusted' attributes support | |
7248 | */ | |
431547b3 | 7249 | static size_t ocfs2_xattr_trusted_list(struct dentry *dentry, char *list, |
99219aea | 7250 | size_t list_size, const char *name, |
431547b3 | 7251 | size_t name_len, int type) |
99219aea | 7252 | { |
ceb1eba3 | 7253 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
7254 | const size_t total_len = prefix_len + name_len + 1; |
7255 | ||
7256 | if (list && total_len <= list_size) { | |
7257 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
7258 | memcpy(list + prefix_len, name, name_len); | |
7259 | list[prefix_len + name_len] = '\0'; | |
7260 | } | |
7261 | return total_len; | |
7262 | } | |
7263 | ||
431547b3 CH |
7264 | static int ocfs2_xattr_trusted_get(struct dentry *dentry, const char *name, |
7265 | void *buffer, size_t size, int type) | |
99219aea MF |
7266 | { |
7267 | if (strcmp(name, "") == 0) | |
7268 | return -EINVAL; | |
431547b3 CH |
7269 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
7270 | name, buffer, size); | |
99219aea MF |
7271 | } |
7272 | ||
431547b3 CH |
7273 | static int ocfs2_xattr_trusted_set(struct dentry *dentry, const char *name, |
7274 | const void *value, size_t size, int flags, int type) | |
99219aea MF |
7275 | { |
7276 | if (strcmp(name, "") == 0) | |
7277 | return -EINVAL; | |
7278 | ||
431547b3 CH |
7279 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
7280 | name, value, size, flags); | |
99219aea MF |
7281 | } |
7282 | ||
7283 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
7284 | .prefix = XATTR_TRUSTED_PREFIX, | |
7285 | .list = ocfs2_xattr_trusted_list, | |
7286 | .get = ocfs2_xattr_trusted_get, | |
7287 | .set = ocfs2_xattr_trusted_set, | |
7288 | }; | |
7289 | ||
99219aea MF |
7290 | /* |
7291 | * 'user' attributes support | |
7292 | */ | |
431547b3 | 7293 | static size_t ocfs2_xattr_user_list(struct dentry *dentry, char *list, |
99219aea | 7294 | size_t list_size, const char *name, |
431547b3 | 7295 | size_t name_len, int type) |
99219aea | 7296 | { |
ceb1eba3 | 7297 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea | 7298 | const size_t total_len = prefix_len + name_len + 1; |
431547b3 | 7299 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7300 | |
7301 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7302 | return 0; | |
7303 | ||
7304 | if (list && total_len <= list_size) { | |
7305 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
7306 | memcpy(list + prefix_len, name, name_len); | |
7307 | list[prefix_len + name_len] = '\0'; | |
7308 | } | |
7309 | return total_len; | |
7310 | } | |
7311 | ||
431547b3 CH |
7312 | static int ocfs2_xattr_user_get(struct dentry *dentry, const char *name, |
7313 | void *buffer, size_t size, int type) | |
99219aea | 7314 | { |
431547b3 | 7315 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7316 | |
7317 | if (strcmp(name, "") == 0) | |
7318 | return -EINVAL; | |
7319 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7320 | return -EOPNOTSUPP; | |
431547b3 | 7321 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_USER, name, |
99219aea MF |
7322 | buffer, size); |
7323 | } | |
7324 | ||
431547b3 CH |
7325 | static int ocfs2_xattr_user_set(struct dentry *dentry, const char *name, |
7326 | const void *value, size_t size, int flags, int type) | |
99219aea | 7327 | { |
431547b3 | 7328 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7329 | |
7330 | if (strcmp(name, "") == 0) | |
7331 | return -EINVAL; | |
7332 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7333 | return -EOPNOTSUPP; | |
7334 | ||
431547b3 CH |
7335 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_USER, |
7336 | name, value, size, flags); | |
99219aea MF |
7337 | } |
7338 | ||
7339 | struct xattr_handler ocfs2_xattr_user_handler = { | |
7340 | .prefix = XATTR_USER_PREFIX, | |
7341 | .list = ocfs2_xattr_user_list, | |
7342 | .get = ocfs2_xattr_user_get, | |
7343 | .set = ocfs2_xattr_user_set, | |
7344 | }; |