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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; | |
5f5261ac | 82 | int set_abort; |
78f30c31 TM |
83 | }; |
84 | ||
cf1d6c76 TY |
85 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
86 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 87 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
88 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
89 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 90 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
91 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
92 | - sizeof(struct ocfs2_xattr_block) \ | |
93 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 94 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
95 | |
96 | static struct ocfs2_xattr_def_value_root def_xv = { | |
97 | .xv.xr_list.l_count = cpu_to_le16(1), | |
98 | }; | |
99 | ||
100 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
101 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
102 | &ocfs2_xattr_acl_access_handler, |
103 | &ocfs2_xattr_acl_default_handler, | |
cf1d6c76 | 104 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 105 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
106 | NULL |
107 | }; | |
108 | ||
c988fd04 | 109 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
111 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
112 | = &ocfs2_xattr_acl_access_handler, | |
113 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
114 | = &ocfs2_xattr_acl_default_handler, | |
cf1d6c76 | 115 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 116 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
117 | }; |
118 | ||
119 | struct ocfs2_xattr_info { | |
6b240ff6 JB |
120 | int xi_name_index; |
121 | const char *xi_name; | |
18853b95 | 122 | int xi_name_len; |
6b240ff6 JB |
123 | const void *xi_value; |
124 | size_t xi_value_len; | |
cf1d6c76 TY |
125 | }; |
126 | ||
127 | struct ocfs2_xattr_search { | |
128 | struct buffer_head *inode_bh; | |
129 | /* | |
130 | * xattr_bh point to the block buffer head which has extended attribute | |
131 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
132 | */ | |
133 | struct buffer_head *xattr_bh; | |
134 | struct ocfs2_xattr_header *header; | |
ba937127 | 135 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
136 | void *base; |
137 | void *end; | |
138 | struct ocfs2_xattr_entry *here; | |
139 | int not_found; | |
140 | }; | |
141 | ||
11179f2c JB |
142 | /* Operations on struct ocfs2_xa_entry */ |
143 | struct ocfs2_xa_loc; | |
144 | struct ocfs2_xa_loc_operations { | |
cf2bc809 JB |
145 | /* |
146 | * Journal functions | |
147 | */ | |
148 | int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc, | |
149 | int type); | |
150 | void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc); | |
151 | ||
11179f2c JB |
152 | /* |
153 | * Return a pointer to the appropriate buffer in loc->xl_storage | |
154 | * at the given offset from loc->xl_header. | |
155 | */ | |
156 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); | |
157 | ||
69a3e539 JB |
158 | /* Can we reuse the existing entry for the new value? */ |
159 | int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc, | |
160 | struct ocfs2_xattr_info *xi); | |
161 | ||
162 | /* How much space is needed for the new value? */ | |
163 | int (*xlo_check_space)(struct ocfs2_xa_loc *loc, | |
164 | struct ocfs2_xattr_info *xi); | |
165 | ||
166 | /* | |
167 | * Return the offset of the first name+value pair. This is | |
168 | * the start of our downward-filling free space. | |
169 | */ | |
170 | int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc); | |
171 | ||
11179f2c JB |
172 | /* |
173 | * Remove the name+value at this location. Do whatever is | |
174 | * appropriate with the remaining name+value pairs. | |
175 | */ | |
176 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); | |
69a3e539 JB |
177 | |
178 | /* Fill xl_entry with a new entry */ | |
179 | void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash); | |
180 | ||
181 | /* Add name+value storage to an entry */ | |
182 | void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size); | |
3fc12afa JB |
183 | |
184 | /* | |
185 | * Initialize the value buf's access and bh fields for this entry. | |
186 | * ocfs2_xa_fill_value_buf() will handle the xv pointer. | |
187 | */ | |
188 | void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc, | |
189 | struct ocfs2_xattr_value_buf *vb); | |
11179f2c JB |
190 | }; |
191 | ||
192 | /* | |
193 | * Describes an xattr entry location. This is a memory structure | |
194 | * tracking the on-disk structure. | |
195 | */ | |
196 | struct ocfs2_xa_loc { | |
cf2bc809 JB |
197 | /* This xattr belongs to this inode */ |
198 | struct inode *xl_inode; | |
199 | ||
11179f2c JB |
200 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ |
201 | struct ocfs2_xattr_header *xl_header; | |
202 | ||
203 | /* Bytes from xl_header to the end of the storage */ | |
204 | int xl_size; | |
205 | ||
206 | /* | |
207 | * The ocfs2_xattr_entry this location describes. If this is | |
208 | * NULL, this location describes the on-disk structure where it | |
209 | * would have been. | |
210 | */ | |
211 | struct ocfs2_xattr_entry *xl_entry; | |
212 | ||
213 | /* | |
214 | * Internal housekeeping | |
215 | */ | |
216 | ||
217 | /* Buffer(s) containing this entry */ | |
218 | void *xl_storage; | |
219 | ||
220 | /* Operations on the storage backing this location */ | |
221 | const struct ocfs2_xa_loc_operations *xl_ops; | |
222 | }; | |
223 | ||
199799a3 JB |
224 | /* |
225 | * Convenience functions to calculate how much space is needed for a | |
226 | * given name+value pair | |
227 | */ | |
228 | static int namevalue_size(int name_len, uint64_t value_len) | |
229 | { | |
230 | if (value_len > OCFS2_XATTR_INLINE_SIZE) | |
231 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
232 | else | |
233 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
234 | } | |
235 | ||
236 | static int namevalue_size_xi(struct ocfs2_xattr_info *xi) | |
237 | { | |
238 | return namevalue_size(xi->xi_name_len, xi->xi_value_len); | |
239 | } | |
240 | ||
241 | static int namevalue_size_xe(struct ocfs2_xattr_entry *xe) | |
242 | { | |
243 | u64 value_len = le64_to_cpu(xe->xe_value_size); | |
244 | ||
245 | BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) && | |
246 | ocfs2_xattr_is_local(xe)); | |
247 | return namevalue_size(xe->xe_name_len, value_len); | |
248 | } | |
249 | ||
250 | ||
fd68a894 | 251 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
252 | struct ocfs2_xattr_header *xh, |
253 | int index, | |
254 | int *block_off, | |
255 | int *new_offset); | |
256 | ||
54f443f4 JB |
257 | static int ocfs2_xattr_block_find(struct inode *inode, |
258 | int name_index, | |
259 | const char *name, | |
260 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
261 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
262 | struct buffer_head *root_bh, | |
263 | int name_index, | |
264 | const char *name, | |
265 | struct ocfs2_xattr_search *xs); | |
266 | ||
0c044f0b | 267 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 268 | struct buffer_head *blk_bh, |
0c044f0b TM |
269 | char *buffer, |
270 | size_t buffer_size); | |
271 | ||
01225596 | 272 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
273 | struct ocfs2_xattr_search *xs, |
274 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
275 | |
276 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
277 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
278 | struct ocfs2_xattr_search *xs, |
279 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 280 | |
47bca495 TM |
281 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
282 | struct buffer_head *root_bh, | |
283 | u64 blkno, u32 cpos, u32 len, void *para); | |
284 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
285 | struct buffer_head *root_bh, | |
286 | xattr_tree_rec_func *rec_func, | |
287 | void *para); | |
288 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
289 | struct ocfs2_xattr_bucket *bucket, | |
290 | void *para); | |
291 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
292 | struct buffer_head *root_bh, | |
293 | u64 blkno, | |
294 | u32 cpos, | |
295 | u32 len, | |
296 | void *para); | |
297 | ||
c58b6032 JB |
298 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
299 | u64 src_blk, u64 last_blk, u64 to_blk, | |
300 | unsigned int start_bucket, | |
301 | u32 *first_hash); | |
492a8a33 TM |
302 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
303 | struct ocfs2_dinode *di, | |
304 | struct ocfs2_xattr_info *xi, | |
305 | struct ocfs2_xattr_search *xis, | |
306 | struct ocfs2_xattr_search *xbs, | |
307 | struct ocfs2_refcount_tree **ref_tree, | |
308 | int *meta_need, | |
309 | int *credits); | |
ce9c5a54 TM |
310 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
311 | struct ocfs2_xattr_bucket *bucket, | |
312 | int offset, | |
313 | struct ocfs2_xattr_value_root **xv, | |
314 | struct buffer_head **bh); | |
a3944256 | 315 | |
0030e001 TY |
316 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
317 | { | |
318 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
319 | } | |
320 | ||
321 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
322 | { | |
323 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
324 | } | |
325 | ||
9c7759aa | 326 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 327 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 328 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 329 | |
ba937127 | 330 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 331 | { |
ba937127 JB |
332 | struct ocfs2_xattr_bucket *bucket; |
333 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 334 | |
ba937127 JB |
335 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
336 | ||
337 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
338 | if (bucket) { | |
339 | bucket->bu_inode = inode; | |
340 | bucket->bu_blocks = blks; | |
341 | } | |
342 | ||
343 | return bucket; | |
344 | } | |
345 | ||
346 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
347 | { | |
348 | int i; | |
349 | ||
350 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
351 | brelse(bucket->bu_bhs[i]); |
352 | bucket->bu_bhs[i] = NULL; | |
353 | } | |
354 | } | |
355 | ||
ba937127 JB |
356 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
357 | { | |
358 | if (bucket) { | |
359 | ocfs2_xattr_bucket_relse(bucket); | |
360 | bucket->bu_inode = NULL; | |
361 | kfree(bucket); | |
362 | } | |
363 | } | |
364 | ||
784b816a JB |
365 | /* |
366 | * A bucket that has never been written to disk doesn't need to be | |
367 | * read. We just need the buffer_heads. Don't call this for | |
368 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
369 | * them fully. | |
370 | */ | |
ba937127 | 371 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
372 | u64 xb_blkno) |
373 | { | |
374 | int i, rc = 0; | |
784b816a | 375 | |
ba937127 JB |
376 | for (i = 0; i < bucket->bu_blocks; i++) { |
377 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
378 | xb_blkno + i); | |
784b816a JB |
379 | if (!bucket->bu_bhs[i]) { |
380 | rc = -EIO; | |
381 | mlog_errno(rc); | |
382 | break; | |
383 | } | |
384 | ||
8cb471e8 | 385 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 386 | bucket->bu_bhs[i])) |
8cb471e8 | 387 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 388 | bucket->bu_bhs[i]); |
784b816a JB |
389 | } |
390 | ||
391 | if (rc) | |
ba937127 | 392 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
393 | return rc; |
394 | } | |
395 | ||
396 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 397 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
398 | u64 xb_blkno) |
399 | { | |
ba937127 | 400 | int rc; |
784b816a | 401 | |
8cb471e8 | 402 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
403 | bucket->bu_blocks, bucket->bu_bhs, 0, |
404 | NULL); | |
4d0e214e | 405 | if (!rc) { |
c8b9cf9a | 406 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
407 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
408 | bucket->bu_bhs, | |
409 | bucket->bu_blocks, | |
410 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 411 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
412 | if (rc) |
413 | mlog_errno(rc); | |
414 | } | |
415 | ||
784b816a | 416 | if (rc) |
ba937127 | 417 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
418 | return rc; |
419 | } | |
420 | ||
1224be02 | 421 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
422 | struct ocfs2_xattr_bucket *bucket, |
423 | int type) | |
424 | { | |
425 | int i, rc = 0; | |
1224be02 | 426 | |
ba937127 | 427 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
428 | rc = ocfs2_journal_access(handle, |
429 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
430 | bucket->bu_bhs[i], type); |
431 | if (rc) { | |
432 | mlog_errno(rc); | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
437 | return rc; | |
438 | } | |
439 | ||
440 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
441 | struct ocfs2_xattr_bucket *bucket) |
442 | { | |
ba937127 | 443 | int i; |
1224be02 | 444 | |
c8b9cf9a | 445 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
446 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
447 | bucket->bu_bhs, bucket->bu_blocks, | |
448 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 449 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 450 | |
ba937127 | 451 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
452 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
453 | } | |
454 | ||
ba937127 | 455 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
456 | struct ocfs2_xattr_bucket *src) |
457 | { | |
458 | int i; | |
ba937127 JB |
459 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
460 | ||
461 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
462 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 463 | |
ba937127 | 464 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
465 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
466 | blocksize); | |
467 | } | |
468 | } | |
1224be02 | 469 | |
4ae1d69b JB |
470 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
471 | struct buffer_head *bh) | |
472 | { | |
d6b32bbb | 473 | int rc; |
4ae1d69b JB |
474 | struct ocfs2_xattr_block *xb = |
475 | (struct ocfs2_xattr_block *)bh->b_data; | |
476 | ||
477 | mlog(0, "Validating xattr block %llu\n", | |
478 | (unsigned long long)bh->b_blocknr); | |
479 | ||
d6b32bbb JB |
480 | BUG_ON(!buffer_uptodate(bh)); |
481 | ||
482 | /* | |
483 | * If the ecc fails, we return the error but otherwise | |
484 | * leave the filesystem running. We know any error is | |
485 | * local to this block. | |
486 | */ | |
487 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
488 | if (rc) | |
489 | return rc; | |
490 | ||
491 | /* | |
492 | * Errors after here are fatal | |
493 | */ | |
494 | ||
4ae1d69b JB |
495 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
496 | ocfs2_error(sb, | |
497 | "Extended attribute block #%llu has bad " | |
498 | "signature %.*s", | |
499 | (unsigned long long)bh->b_blocknr, 7, | |
500 | xb->xb_signature); | |
501 | return -EINVAL; | |
502 | } | |
503 | ||
504 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
505 | ocfs2_error(sb, | |
506 | "Extended attribute block #%llu has an " | |
507 | "invalid xb_blkno of %llu", | |
508 | (unsigned long long)bh->b_blocknr, | |
509 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
510 | return -EINVAL; | |
511 | } | |
512 | ||
513 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
514 | ocfs2_error(sb, | |
515 | "Extended attribute block #%llu has an invalid " | |
516 | "xb_fs_generation of #%u", | |
517 | (unsigned long long)bh->b_blocknr, | |
518 | le32_to_cpu(xb->xb_fs_generation)); | |
519 | return -EINVAL; | |
520 | } | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
526 | struct buffer_head **bh) | |
527 | { | |
528 | int rc; | |
529 | struct buffer_head *tmp = *bh; | |
530 | ||
8cb471e8 | 531 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 532 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
533 | |
534 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
535 | if (!rc && !*bh) | |
536 | *bh = tmp; | |
537 | ||
538 | return rc; | |
539 | } | |
540 | ||
936b8834 | 541 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
542 | { |
543 | struct xattr_handler *handler = NULL; | |
544 | ||
545 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
546 | handler = ocfs2_xattr_handler_map[name_index]; | |
547 | ||
936b8834 | 548 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
549 | } |
550 | ||
40daa16a | 551 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 552 | const char *name, |
40daa16a | 553 | int name_len) |
cf1d6c76 TY |
554 | { |
555 | /* Get hash value of uuid from super block */ | |
556 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
557 | int i; | |
558 | ||
cf1d6c76 TY |
559 | /* hash extended attribute name */ |
560 | for (i = 0; i < name_len; i++) { | |
561 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
562 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
563 | *name++; | |
564 | } | |
565 | ||
566 | return hash; | |
567 | } | |
568 | ||
534eaddd TY |
569 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
570 | { | |
199799a3 JB |
571 | return namevalue_size(name_len, value_len) + |
572 | sizeof(struct ocfs2_xattr_entry); | |
573 | } | |
534eaddd | 574 | |
199799a3 JB |
575 | static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi) |
576 | { | |
577 | return namevalue_size_xi(xi) + | |
578 | sizeof(struct ocfs2_xattr_entry); | |
579 | } | |
534eaddd | 580 | |
199799a3 JB |
581 | static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe) |
582 | { | |
583 | return namevalue_size_xe(xe) + | |
584 | sizeof(struct ocfs2_xattr_entry); | |
534eaddd TY |
585 | } |
586 | ||
587 | int ocfs2_calc_security_init(struct inode *dir, | |
588 | struct ocfs2_security_xattr_info *si, | |
589 | int *want_clusters, | |
590 | int *xattr_credits, | |
591 | struct ocfs2_alloc_context **xattr_ac) | |
592 | { | |
593 | int ret = 0; | |
594 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
595 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
596 | si->value_len); | |
597 | ||
598 | /* | |
599 | * The max space of security xattr taken inline is | |
600 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
601 | * So reserve one metadata block for it is ok. | |
602 | */ | |
603 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
604 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
605 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
606 | if (ret) { | |
607 | mlog_errno(ret); | |
608 | return ret; | |
609 | } | |
610 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
611 | } | |
612 | ||
613 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
614 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
615 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
616 | si->value_len); | |
617 | ||
618 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
619 | new_clusters); | |
620 | *want_clusters += new_clusters; | |
621 | } | |
534eaddd TY |
622 | return ret; |
623 | } | |
624 | ||
89c38bd0 TY |
625 | int ocfs2_calc_xattr_init(struct inode *dir, |
626 | struct buffer_head *dir_bh, | |
627 | int mode, | |
628 | struct ocfs2_security_xattr_info *si, | |
629 | int *want_clusters, | |
630 | int *xattr_credits, | |
9b7895ef | 631 | int *want_meta) |
89c38bd0 TY |
632 | { |
633 | int ret = 0; | |
634 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 635 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
636 | |
637 | if (si->enable) | |
638 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
639 | si->value_len); | |
640 | ||
641 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
642 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
643 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
644 | "", NULL, 0); | |
645 | if (acl_len > 0) { | |
646 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
647 | if (S_ISDIR(mode)) | |
648 | a_size <<= 1; | |
649 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
650 | mlog_errno(ret); | |
651 | return ret; | |
652 | } | |
653 | } | |
654 | ||
655 | if (!(s_size + a_size)) | |
656 | return ret; | |
657 | ||
658 | /* | |
659 | * The max space of security xattr taken inline is | |
660 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
661 | * The max space of acl xattr taken inline is | |
662 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
663 | * when blocksize = 512, may reserve one more cluser for | |
664 | * xattr bucket, otherwise reserve one metadata block | |
665 | * for them is ok. | |
6c9fd1dc TY |
666 | * If this is a new directory with inline data, |
667 | * we choose to reserve the entire inline area for | |
668 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
669 | */ |
670 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 671 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 672 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 673 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
674 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
675 | } | |
676 | ||
677 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
678 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
679 | *want_clusters += 1; | |
680 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
681 | } | |
682 | ||
0e445b6f TY |
683 | /* |
684 | * reserve credits and clusters for xattrs which has large value | |
685 | * and have to be set outside | |
686 | */ | |
687 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
688 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
689 | si->value_len); | |
690 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
691 | new_clusters); | |
692 | *want_clusters += new_clusters; | |
693 | } | |
89c38bd0 TY |
694 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
695 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
696 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
697 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
698 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
699 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
700 | new_clusters); | |
701 | *want_clusters += new_clusters; | |
89c38bd0 TY |
702 | } |
703 | ||
704 | return ret; | |
705 | } | |
706 | ||
f56654c4 TM |
707 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
708 | u32 clusters_to_add, | |
19b801f4 | 709 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 710 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
711 | { |
712 | int status = 0; | |
85db90e7 | 713 | handle_t *handle = ctxt->handle; |
f56654c4 | 714 | enum ocfs2_alloc_restarted why; |
19b801f4 | 715 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 716 | struct ocfs2_extent_tree et; |
f56654c4 TM |
717 | |
718 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
719 | ||
5e404e9e | 720 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 721 | |
0cf2f763 | 722 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 723 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
724 | if (status < 0) { |
725 | mlog_errno(status); | |
726 | goto leave; | |
727 | } | |
728 | ||
19b801f4 | 729 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
cbee7e1a JB |
730 | status = ocfs2_add_clusters_in_btree(handle, |
731 | &et, | |
f56654c4 TM |
732 | &logical_start, |
733 | clusters_to_add, | |
734 | 0, | |
78f30c31 TM |
735 | ctxt->data_ac, |
736 | ctxt->meta_ac, | |
f99b9b7c | 737 | &why); |
85db90e7 TM |
738 | if (status < 0) { |
739 | mlog_errno(status); | |
f56654c4 TM |
740 | goto leave; |
741 | } | |
742 | ||
ec20cec7 | 743 | ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 | 744 | |
19b801f4 | 745 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 746 | |
85db90e7 TM |
747 | /* |
748 | * We should have already allocated enough space before the transaction, | |
749 | * so no need to restart. | |
750 | */ | |
751 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
752 | |
753 | leave: | |
f56654c4 TM |
754 | |
755 | return status; | |
756 | } | |
757 | ||
758 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 759 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 760 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 761 | unsigned int ext_flags, |
78f30c31 | 762 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
763 | { |
764 | int ret; | |
765 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 766 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
767 | struct ocfs2_extent_tree et; |
768 | ||
5e404e9e | 769 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 770 | |
0cf2f763 | 771 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 772 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
773 | if (ret) { |
774 | mlog_errno(ret); | |
85db90e7 | 775 | goto out; |
f56654c4 TM |
776 | } |
777 | ||
dbdcf6a4 | 778 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 779 | &ctxt->dealloc); |
f56654c4 TM |
780 | if (ret) { |
781 | mlog_errno(ret); | |
85db90e7 | 782 | goto out; |
f56654c4 TM |
783 | } |
784 | ||
d72cc72d | 785 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
ec20cec7 | 786 | ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 | 787 | |
492a8a33 TM |
788 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
789 | ret = ocfs2_decrease_refcount(inode, handle, | |
790 | ocfs2_blocks_to_clusters(inode->i_sb, | |
791 | phys_blkno), | |
792 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
793 | else | |
794 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
795 | phys_blkno, len); | |
f56654c4 TM |
796 | if (ret) |
797 | mlog_errno(ret); | |
798 | ||
f56654c4 | 799 | out: |
f56654c4 TM |
800 | return ret; |
801 | } | |
802 | ||
803 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
804 | u32 old_clusters, | |
805 | u32 new_clusters, | |
19b801f4 | 806 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 807 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
808 | { |
809 | int ret = 0; | |
492a8a33 | 810 | unsigned int ext_flags; |
f56654c4 TM |
811 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
812 | u64 block; | |
f56654c4 TM |
813 | |
814 | if (old_clusters <= new_clusters) | |
815 | return 0; | |
816 | ||
817 | cpos = new_clusters; | |
818 | trunc_len = old_clusters - new_clusters; | |
819 | while (trunc_len) { | |
820 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 821 | &alloc_size, |
492a8a33 | 822 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
823 | if (ret) { |
824 | mlog_errno(ret); | |
825 | goto out; | |
826 | } | |
827 | ||
828 | if (alloc_size > trunc_len) | |
829 | alloc_size = trunc_len; | |
830 | ||
19b801f4 | 831 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 832 | phys_cpos, alloc_size, |
492a8a33 | 833 | ext_flags, ctxt); |
f56654c4 TM |
834 | if (ret) { |
835 | mlog_errno(ret); | |
836 | goto out; | |
837 | } | |
838 | ||
839 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
840 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
841 | block, alloc_size); | |
f56654c4 TM |
842 | cpos += alloc_size; |
843 | trunc_len -= alloc_size; | |
844 | } | |
845 | ||
846 | out: | |
f56654c4 TM |
847 | return ret; |
848 | } | |
849 | ||
850 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 851 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
852 | int len, |
853 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
854 | { |
855 | int ret; | |
856 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 857 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
858 | |
859 | if (new_clusters == old_clusters) | |
860 | return 0; | |
861 | ||
862 | if (new_clusters > old_clusters) | |
863 | ret = ocfs2_xattr_extend_allocation(inode, | |
864 | new_clusters - old_clusters, | |
b3e5d379 | 865 | vb, ctxt); |
f56654c4 TM |
866 | else |
867 | ret = ocfs2_xattr_shrink_size(inode, | |
868 | old_clusters, new_clusters, | |
b3e5d379 | 869 | vb, ctxt); |
f56654c4 TM |
870 | |
871 | return ret; | |
872 | } | |
cf1d6c76 | 873 | |
936b8834 TM |
874 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
875 | size_t *result, const char *prefix, | |
876 | const char *name, int name_len) | |
877 | { | |
878 | char *p = buffer + *result; | |
879 | int prefix_len = strlen(prefix); | |
880 | int total_len = prefix_len + name_len + 1; | |
881 | ||
882 | *result += total_len; | |
883 | ||
884 | /* we are just looking for how big our buffer needs to be */ | |
885 | if (!size) | |
886 | return 0; | |
887 | ||
888 | if (*result > size) | |
889 | return -ERANGE; | |
890 | ||
891 | memcpy(p, prefix, prefix_len); | |
892 | memcpy(p + prefix_len, name, name_len); | |
893 | p[prefix_len + name_len] = '\0'; | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
cf1d6c76 TY |
898 | static int ocfs2_xattr_list_entries(struct inode *inode, |
899 | struct ocfs2_xattr_header *header, | |
900 | char *buffer, size_t buffer_size) | |
901 | { | |
936b8834 TM |
902 | size_t result = 0; |
903 | int i, type, ret; | |
904 | const char *prefix, *name; | |
cf1d6c76 TY |
905 | |
906 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
907 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
908 | type = ocfs2_xattr_get_type(entry); |
909 | prefix = ocfs2_xattr_prefix(type); | |
910 | ||
911 | if (prefix) { | |
912 | name = (const char *)header + | |
913 | le16_to_cpu(entry->xe_name_offset); | |
914 | ||
915 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
916 | &result, prefix, name, | |
917 | entry->xe_name_len); | |
918 | if (ret) | |
919 | return ret; | |
cf1d6c76 TY |
920 | } |
921 | } | |
922 | ||
936b8834 | 923 | return result; |
cf1d6c76 TY |
924 | } |
925 | ||
8b2c0dba TM |
926 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
927 | struct ocfs2_dinode *di) | |
928 | { | |
929 | struct ocfs2_xattr_header *xh; | |
930 | int i; | |
931 | ||
932 | xh = (struct ocfs2_xattr_header *) | |
933 | ((void *)di + inode->i_sb->s_blocksize - | |
934 | le16_to_cpu(di->i_xattr_inline_size)); | |
935 | ||
936 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
937 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
938 | return 1; | |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
cf1d6c76 TY |
943 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
944 | struct ocfs2_dinode *di, | |
945 | char *buffer, | |
946 | size_t buffer_size) | |
947 | { | |
948 | struct ocfs2_xattr_header *header = NULL; | |
949 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
950 | int ret = 0; | |
951 | ||
952 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
953 | return ret; | |
954 | ||
955 | header = (struct ocfs2_xattr_header *) | |
956 | ((void *)di + inode->i_sb->s_blocksize - | |
957 | le16_to_cpu(di->i_xattr_inline_size)); | |
958 | ||
959 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
960 | ||
961 | return ret; | |
962 | } | |
963 | ||
964 | static int ocfs2_xattr_block_list(struct inode *inode, | |
965 | struct ocfs2_dinode *di, | |
966 | char *buffer, | |
967 | size_t buffer_size) | |
968 | { | |
969 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 970 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
971 | int ret = 0; |
972 | ||
973 | if (!di->i_xattr_loc) | |
974 | return ret; | |
975 | ||
4ae1d69b JB |
976 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
977 | &blk_bh); | |
cf1d6c76 TY |
978 | if (ret < 0) { |
979 | mlog_errno(ret); | |
980 | return ret; | |
981 | } | |
cf1d6c76 | 982 | |
0c044f0b | 983 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
984 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
985 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
986 | ret = ocfs2_xattr_list_entries(inode, header, | |
987 | buffer, buffer_size); | |
47bca495 TM |
988 | } else |
989 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 990 | buffer, buffer_size); |
4ae1d69b | 991 | |
cf1d6c76 TY |
992 | brelse(blk_bh); |
993 | ||
994 | return ret; | |
995 | } | |
996 | ||
997 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
998 | char *buffer, | |
999 | size_t size) | |
1000 | { | |
1001 | int ret = 0, i_ret = 0, b_ret = 0; | |
1002 | struct buffer_head *di_bh = NULL; | |
1003 | struct ocfs2_dinode *di = NULL; | |
1004 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
1005 | ||
8154da3d TY |
1006 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
1007 | return -EOPNOTSUPP; | |
1008 | ||
cf1d6c76 TY |
1009 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1010 | return ret; | |
1011 | ||
1012 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
1013 | if (ret < 0) { | |
1014 | mlog_errno(ret); | |
1015 | return ret; | |
1016 | } | |
1017 | ||
1018 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1019 | ||
1020 | down_read(&oi->ip_xattr_sem); | |
1021 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
1022 | if (i_ret < 0) | |
1023 | b_ret = 0; | |
1024 | else { | |
1025 | if (buffer) { | |
1026 | buffer += i_ret; | |
1027 | size -= i_ret; | |
1028 | } | |
1029 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
1030 | buffer, size); | |
1031 | if (b_ret < 0) | |
1032 | i_ret = 0; | |
1033 | } | |
1034 | up_read(&oi->ip_xattr_sem); | |
1035 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
1036 | ||
1037 | brelse(di_bh); | |
1038 | ||
1039 | return i_ret + b_ret; | |
1040 | } | |
1041 | ||
1042 | static int ocfs2_xattr_find_entry(int name_index, | |
1043 | const char *name, | |
1044 | struct ocfs2_xattr_search *xs) | |
1045 | { | |
1046 | struct ocfs2_xattr_entry *entry; | |
1047 | size_t name_len; | |
1048 | int i, cmp = 1; | |
1049 | ||
1050 | if (name == NULL) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | name_len = strlen(name); | |
1054 | entry = xs->here; | |
1055 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1056 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
1057 | if (!cmp) | |
1058 | cmp = name_len - entry->xe_name_len; | |
1059 | if (!cmp) | |
1060 | cmp = memcmp(name, (xs->base + | |
1061 | le16_to_cpu(entry->xe_name_offset)), | |
1062 | name_len); | |
1063 | if (cmp == 0) | |
1064 | break; | |
1065 | entry += 1; | |
1066 | } | |
1067 | xs->here = entry; | |
1068 | ||
1069 | return cmp ? -ENODATA : 0; | |
1070 | } | |
1071 | ||
1072 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 1073 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
1074 | void *buffer, |
1075 | size_t len) | |
1076 | { | |
1077 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1078 | u64 blkno; | |
1079 | int i, ret = 0; | |
1080 | size_t cplen, blocksize; | |
1081 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1082 | struct ocfs2_extent_list *el; |
1083 | ||
cf1d6c76 TY |
1084 | el = &xv->xr_list; |
1085 | clusters = le32_to_cpu(xv->xr_clusters); | |
1086 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1087 | blocksize = inode->i_sb->s_blocksize; | |
1088 | ||
1089 | cpos = 0; | |
1090 | while (cpos < clusters) { | |
1091 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1092 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1093 | if (ret) { |
1094 | mlog_errno(ret); | |
1095 | goto out; | |
1096 | } | |
1097 | ||
1098 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1099 | /* Copy ocfs2_xattr_value */ | |
1100 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1101 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1102 | &bh, NULL); | |
cf1d6c76 TY |
1103 | if (ret) { |
1104 | mlog_errno(ret); | |
1105 | goto out; | |
1106 | } | |
1107 | ||
1108 | cplen = len >= blocksize ? blocksize : len; | |
1109 | memcpy(buffer, bh->b_data, cplen); | |
1110 | len -= cplen; | |
1111 | buffer += cplen; | |
1112 | ||
1113 | brelse(bh); | |
1114 | bh = NULL; | |
1115 | if (len == 0) | |
1116 | break; | |
1117 | } | |
1118 | cpos += num_clusters; | |
1119 | } | |
1120 | out: | |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1125 | int name_index, | |
1126 | const char *name, | |
1127 | void *buffer, | |
1128 | size_t buffer_size, | |
1129 | struct ocfs2_xattr_search *xs) | |
1130 | { | |
1131 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1132 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1133 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1134 | size_t size; |
1135 | int ret = 0; | |
1136 | ||
1137 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1138 | return -ENODATA; | |
1139 | ||
1140 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1141 | xs->header = (struct ocfs2_xattr_header *) | |
1142 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1143 | xs->base = (void *)xs->header; | |
1144 | xs->here = xs->header->xh_entries; | |
1145 | ||
1146 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1147 | if (ret) | |
1148 | return ret; | |
1149 | size = le64_to_cpu(xs->here->xe_value_size); | |
1150 | if (buffer) { | |
1151 | if (size > buffer_size) | |
1152 | return -ERANGE; | |
1153 | if (ocfs2_xattr_is_local(xs->here)) { | |
1154 | memcpy(buffer, (void *)xs->base + | |
1155 | le16_to_cpu(xs->here->xe_name_offset) + | |
1156 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1157 | } else { | |
589dc260 TM |
1158 | xv = (struct ocfs2_xattr_value_root *) |
1159 | (xs->base + le16_to_cpu( | |
1160 | xs->here->xe_name_offset) + | |
1161 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1162 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1163 | buffer, size); |
1164 | if (ret < 0) { | |
1165 | mlog_errno(ret); | |
1166 | return ret; | |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | return size; | |
1172 | } | |
1173 | ||
1174 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1175 | int name_index, | |
1176 | const char *name, | |
1177 | void *buffer, | |
1178 | size_t buffer_size, | |
1179 | struct ocfs2_xattr_search *xs) | |
1180 | { | |
cf1d6c76 | 1181 | struct ocfs2_xattr_block *xb; |
589dc260 | 1182 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1183 | size_t size; |
44d8e4e1 SM |
1184 | int ret = -ENODATA, name_offset, name_len, i; |
1185 | int uninitialized_var(block_off); | |
cf1d6c76 | 1186 | |
ba937127 JB |
1187 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1188 | if (!xs->bucket) { | |
1189 | ret = -ENOMEM; | |
1190 | mlog_errno(ret); | |
1191 | goto cleanup; | |
1192 | } | |
589dc260 | 1193 | |
54f443f4 JB |
1194 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1195 | if (ret) { | |
cf1d6c76 | 1196 | mlog_errno(ret); |
cf1d6c76 TY |
1197 | goto cleanup; |
1198 | } | |
1199 | ||
6c1e183e TY |
1200 | if (xs->not_found) { |
1201 | ret = -ENODATA; | |
1202 | goto cleanup; | |
1203 | } | |
1204 | ||
54f443f4 | 1205 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1206 | size = le64_to_cpu(xs->here->xe_value_size); |
1207 | if (buffer) { | |
1208 | ret = -ERANGE; | |
1209 | if (size > buffer_size) | |
1210 | goto cleanup; | |
589dc260 TM |
1211 | |
1212 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1213 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1214 | i = xs->here - xs->header->xh_entries; | |
1215 | ||
1216 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1217 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1218 | bucket_xh(xs->bucket), |
589dc260 TM |
1219 | i, |
1220 | &block_off, | |
1221 | &name_offset); | |
ba937127 | 1222 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1223 | } |
cf1d6c76 TY |
1224 | if (ocfs2_xattr_is_local(xs->here)) { |
1225 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1226 | name_offset + name_len, size); |
cf1d6c76 | 1227 | } else { |
589dc260 TM |
1228 | xv = (struct ocfs2_xattr_value_root *) |
1229 | (xs->base + name_offset + name_len); | |
1230 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1231 | buffer, size); |
1232 | if (ret < 0) { | |
1233 | mlog_errno(ret); | |
1234 | goto cleanup; | |
1235 | } | |
1236 | } | |
1237 | } | |
1238 | ret = size; | |
1239 | cleanup: | |
ba937127 | 1240 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1241 | |
54f443f4 JB |
1242 | brelse(xs->xattr_bh); |
1243 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1244 | return ret; |
1245 | } | |
1246 | ||
4e3e9d02 TY |
1247 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1248 | struct buffer_head *di_bh, | |
0030e001 TY |
1249 | int name_index, |
1250 | const char *name, | |
1251 | void *buffer, | |
1252 | size_t buffer_size) | |
cf1d6c76 TY |
1253 | { |
1254 | int ret; | |
1255 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1256 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1257 | struct ocfs2_xattr_search xis = { | |
1258 | .not_found = -ENODATA, | |
1259 | }; | |
1260 | struct ocfs2_xattr_search xbs = { | |
1261 | .not_found = -ENODATA, | |
1262 | }; | |
1263 | ||
8154da3d TY |
1264 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1265 | return -EOPNOTSUPP; | |
1266 | ||
cf1d6c76 TY |
1267 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1268 | ret = -ENODATA; | |
1269 | ||
cf1d6c76 TY |
1270 | xis.inode_bh = xbs.inode_bh = di_bh; |
1271 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1272 | ||
1273 | down_read(&oi->ip_xattr_sem); | |
1274 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1275 | buffer_size, &xis); | |
6c1e183e | 1276 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1277 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1278 | buffer_size, &xbs); | |
1279 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1280 | |
1281 | return ret; | |
1282 | } | |
1283 | ||
1284 | /* ocfs2_xattr_get() | |
1285 | * | |
1286 | * Copy an extended attribute into the buffer provided. | |
1287 | * Buffer is NULL to compute the size of buffer required. | |
1288 | */ | |
1289 | static int ocfs2_xattr_get(struct inode *inode, | |
1290 | int name_index, | |
1291 | const char *name, | |
1292 | void *buffer, | |
1293 | size_t buffer_size) | |
1294 | { | |
1295 | int ret; | |
1296 | struct buffer_head *di_bh = NULL; | |
1297 | ||
1298 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1299 | if (ret < 0) { | |
1300 | mlog_errno(ret); | |
1301 | return ret; | |
1302 | } | |
1303 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1304 | name, buffer, buffer_size); | |
1305 | ||
cf1d6c76 TY |
1306 | ocfs2_inode_unlock(inode, 0); |
1307 | ||
1308 | brelse(di_bh); | |
1309 | ||
1310 | return ret; | |
1311 | } | |
1312 | ||
1313 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1314 | handle_t *handle, |
492a8a33 | 1315 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1316 | const void *value, |
1317 | int value_len) | |
1318 | { | |
71d548a6 | 1319 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1320 | u16 blocksize = inode->i_sb->s_blocksize; |
1321 | u32 p_cluster, num_clusters; | |
1322 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1323 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1324 | u64 blkno; | |
1325 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1326 | unsigned int ext_flags; |
1327 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1328 | |
1329 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1330 | ||
cf1d6c76 TY |
1331 | while (cpos < clusters) { |
1332 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1333 | &num_clusters, &xv->xr_list, |
492a8a33 | 1334 | &ext_flags); |
cf1d6c76 TY |
1335 | if (ret) { |
1336 | mlog_errno(ret); | |
85db90e7 | 1337 | goto out; |
cf1d6c76 TY |
1338 | } |
1339 | ||
492a8a33 TM |
1340 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1341 | ||
cf1d6c76 TY |
1342 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1343 | ||
1344 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1345 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1346 | &bh, NULL); | |
cf1d6c76 TY |
1347 | if (ret) { |
1348 | mlog_errno(ret); | |
85db90e7 | 1349 | goto out; |
cf1d6c76 TY |
1350 | } |
1351 | ||
1352 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1353 | INODE_CACHE(inode), |
cf1d6c76 TY |
1354 | bh, |
1355 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1356 | if (ret < 0) { | |
1357 | mlog_errno(ret); | |
85db90e7 | 1358 | goto out; |
cf1d6c76 TY |
1359 | } |
1360 | ||
1361 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1362 | memcpy(bh->b_data, value, cp_len); | |
1363 | value_len -= cp_len; | |
1364 | value += cp_len; | |
1365 | if (cp_len < blocksize) | |
1366 | memset(bh->b_data + cp_len, 0, | |
1367 | blocksize - cp_len); | |
1368 | ||
ec20cec7 | 1369 | ocfs2_journal_dirty(handle, bh); |
cf1d6c76 TY |
1370 | brelse(bh); |
1371 | bh = NULL; | |
1372 | ||
1373 | /* | |
1374 | * XXX: do we need to empty all the following | |
1375 | * blocks in this cluster? | |
1376 | */ | |
1377 | if (!value_len) | |
1378 | break; | |
1379 | } | |
1380 | cpos += num_clusters; | |
1381 | } | |
cf1d6c76 TY |
1382 | out: |
1383 | brelse(bh); | |
1384 | ||
1385 | return ret; | |
1386 | } | |
1387 | ||
69a3e539 JB |
1388 | static int ocfs2_xa_check_space_helper(int needed_space, int free_start, |
1389 | int num_entries) | |
1390 | { | |
1391 | int free_space; | |
1392 | ||
1393 | if (!needed_space) | |
1394 | return 0; | |
1395 | ||
1396 | free_space = free_start - | |
1397 | sizeof(struct ocfs2_xattr_header) - | |
1398 | (num_entries * sizeof(struct ocfs2_xattr_entry)) - | |
1399 | OCFS2_XATTR_HEADER_GAP; | |
1400 | if (free_space < 0) | |
1401 | return -EIO; | |
1402 | if (free_space < needed_space) | |
1403 | return -ENOSPC; | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
cf2bc809 JB |
1408 | static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc, |
1409 | int type) | |
1410 | { | |
1411 | return loc->xl_ops->xlo_journal_access(handle, loc, type); | |
1412 | } | |
1413 | ||
1414 | static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc) | |
1415 | { | |
1416 | loc->xl_ops->xlo_journal_dirty(handle, loc); | |
1417 | } | |
1418 | ||
69a3e539 JB |
1419 | /* Give a pointer into the storage for the given offset */ |
1420 | static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset) | |
1421 | { | |
1422 | BUG_ON(offset >= loc->xl_size); | |
1423 | return loc->xl_ops->xlo_offset_pointer(loc, offset); | |
1424 | } | |
1425 | ||
11179f2c JB |
1426 | /* |
1427 | * Wipe the name+value pair and allow the storage to reclaim it. This | |
1428 | * must be followed by either removal of the entry or a call to | |
1429 | * ocfs2_xa_add_namevalue(). | |
1430 | */ | |
1431 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1432 | { | |
1433 | loc->xl_ops->xlo_wipe_namevalue(loc); | |
1434 | } | |
1435 | ||
69a3e539 JB |
1436 | /* |
1437 | * Find lowest offset to a name+value pair. This is the start of our | |
1438 | * downward-growing free space. | |
1439 | */ | |
1440 | static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc) | |
1441 | { | |
1442 | return loc->xl_ops->xlo_get_free_start(loc); | |
1443 | } | |
1444 | ||
1445 | /* Can we reuse loc->xl_entry for xi? */ | |
1446 | static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc, | |
1447 | struct ocfs2_xattr_info *xi) | |
1448 | { | |
1449 | return loc->xl_ops->xlo_can_reuse(loc, xi); | |
1450 | } | |
1451 | ||
1452 | /* How much free space is needed to set the new value */ | |
1453 | static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc, | |
1454 | struct ocfs2_xattr_info *xi) | |
1455 | { | |
1456 | return loc->xl_ops->xlo_check_space(loc, xi); | |
1457 | } | |
1458 | ||
1459 | static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) | |
1460 | { | |
1461 | loc->xl_ops->xlo_add_entry(loc, name_hash); | |
1462 | loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash); | |
1463 | /* | |
1464 | * We can't leave the new entry's xe_name_offset at zero or | |
1465 | * add_namevalue() will go nuts. We set it to the size of our | |
1466 | * storage so that it can never be less than any other entry. | |
1467 | */ | |
1468 | loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size); | |
1469 | } | |
1470 | ||
1471 | static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc, | |
1472 | struct ocfs2_xattr_info *xi) | |
1473 | { | |
1474 | int size = namevalue_size_xi(xi); | |
1475 | int nameval_offset; | |
1476 | char *nameval_buf; | |
1477 | ||
1478 | loc->xl_ops->xlo_add_namevalue(loc, size); | |
1479 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
1480 | loc->xl_entry->xe_name_len = xi->xi_name_len; | |
1481 | ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index); | |
1482 | ocfs2_xattr_set_local(loc->xl_entry, | |
1483 | xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE); | |
1484 | ||
1485 | nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1486 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); | |
1487 | memset(nameval_buf, 0, size); | |
1488 | memcpy(nameval_buf, xi->xi_name, xi->xi_name_len); | |
1489 | } | |
1490 | ||
3fc12afa JB |
1491 | static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc, |
1492 | struct ocfs2_xattr_value_buf *vb) | |
1493 | { | |
1494 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1495 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
1496 | ||
1497 | /* Value bufs are for value trees */ | |
73857ee0 | 1498 | BUG_ON(ocfs2_xattr_is_local(loc->xl_entry)); |
3fc12afa JB |
1499 | BUG_ON(namevalue_size_xe(loc->xl_entry) != |
1500 | (name_size + OCFS2_XATTR_ROOT_SIZE)); | |
1501 | ||
1502 | loc->xl_ops->xlo_fill_value_buf(loc, vb); | |
1503 | vb->vb_xv = | |
1504 | (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc, | |
1505 | nameval_offset + | |
1506 | name_size); | |
1507 | } | |
1508 | ||
cf2bc809 JB |
1509 | static int ocfs2_xa_block_journal_access(handle_t *handle, |
1510 | struct ocfs2_xa_loc *loc, int type) | |
1511 | { | |
1512 | struct buffer_head *bh = loc->xl_storage; | |
1513 | ocfs2_journal_access_func access; | |
1514 | ||
1515 | if (loc->xl_size == (bh->b_size - | |
1516 | offsetof(struct ocfs2_xattr_block, | |
1517 | xb_attrs.xb_header))) | |
1518 | access = ocfs2_journal_access_xb; | |
1519 | else | |
1520 | access = ocfs2_journal_access_di; | |
1521 | return access(handle, INODE_CACHE(loc->xl_inode), bh, type); | |
1522 | } | |
1523 | ||
1524 | static void ocfs2_xa_block_journal_dirty(handle_t *handle, | |
1525 | struct ocfs2_xa_loc *loc) | |
1526 | { | |
1527 | struct buffer_head *bh = loc->xl_storage; | |
1528 | ||
1529 | ocfs2_journal_dirty(handle, bh); | |
1530 | } | |
1531 | ||
11179f2c JB |
1532 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, |
1533 | int offset) | |
1534 | { | |
11179f2c JB |
1535 | return (char *)loc->xl_header + offset; |
1536 | } | |
1537 | ||
69a3e539 JB |
1538 | static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc, |
1539 | struct ocfs2_xattr_info *xi) | |
1540 | { | |
1541 | /* | |
1542 | * Block storage is strict. If the sizes aren't exact, we will | |
1543 | * remove the old one and reinsert the new. | |
1544 | */ | |
1545 | return namevalue_size_xe(loc->xl_entry) == | |
1546 | namevalue_size_xi(xi); | |
1547 | } | |
1548 | ||
1549 | static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc) | |
1550 | { | |
1551 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1552 | int i, count = le16_to_cpu(xh->xh_count); | |
1553 | int offset, free_start = loc->xl_size; | |
1554 | ||
1555 | for (i = 0; i < count; i++) { | |
1556 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1557 | if (offset < free_start) | |
1558 | free_start = offset; | |
1559 | } | |
1560 | ||
1561 | return free_start; | |
1562 | } | |
1563 | ||
1564 | static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc, | |
1565 | struct ocfs2_xattr_info *xi) | |
1566 | { | |
1567 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1568 | int free_start = ocfs2_xa_get_free_start(loc); | |
1569 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1570 | ||
1571 | /* | |
1572 | * Block storage will reclaim the original entry before inserting | |
1573 | * the new value, so we only need the difference. If the new | |
1574 | * entry is smaller than the old one, we don't need anything. | |
1575 | */ | |
1576 | if (loc->xl_entry) { | |
1577 | /* Don't need space if we're reusing! */ | |
1578 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1579 | needed_space = 0; | |
1580 | else | |
1581 | needed_space -= ocfs2_xe_entry_usage(loc->xl_entry); | |
1582 | } | |
1583 | if (needed_space < 0) | |
1584 | needed_space = 0; | |
1585 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1586 | } | |
1587 | ||
11179f2c JB |
1588 | /* |
1589 | * Block storage for xattrs keeps the name+value pairs compacted. When | |
1590 | * we remove one, we have to shift any that preceded it towards the end. | |
1591 | */ | |
1592 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1593 | { | |
1594 | int i, offset; | |
1595 | int namevalue_offset, first_namevalue_offset, namevalue_size; | |
1596 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1597 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
11179f2c JB |
1598 | int count = le16_to_cpu(xh->xh_count); |
1599 | ||
1600 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); | |
199799a3 | 1601 | namevalue_size = namevalue_size_xe(entry); |
69a3e539 | 1602 | first_namevalue_offset = ocfs2_xa_get_free_start(loc); |
11179f2c JB |
1603 | |
1604 | /* Shift the name+value pairs */ | |
1605 | memmove((char *)xh + first_namevalue_offset + namevalue_size, | |
1606 | (char *)xh + first_namevalue_offset, | |
1607 | namevalue_offset - first_namevalue_offset); | |
1608 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); | |
1609 | ||
1610 | /* Now tell xh->xh_entries about it */ | |
1611 | for (i = 0; i < count; i++) { | |
1612 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
dfe4d3d6 | 1613 | if (offset <= namevalue_offset) |
11179f2c JB |
1614 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, |
1615 | namevalue_size); | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * Note that we don't update xh_free_start or xh_name_value_len | |
1620 | * because they're not used in block-stored xattrs. | |
1621 | */ | |
1622 | } | |
1623 | ||
69a3e539 JB |
1624 | static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1625 | { | |
1626 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1627 | loc->xl_entry = &(loc->xl_header->xh_entries[count]); | |
1628 | le16_add_cpu(&loc->xl_header->xh_count, 1); | |
1629 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1630 | } | |
1631 | ||
1632 | static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1633 | { | |
1634 | int free_start = ocfs2_xa_get_free_start(loc); | |
1635 | ||
1636 | loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size); | |
1637 | } | |
1638 | ||
3fc12afa JB |
1639 | static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc, |
1640 | struct ocfs2_xattr_value_buf *vb) | |
1641 | { | |
1642 | struct buffer_head *bh = loc->xl_storage; | |
1643 | ||
1644 | if (loc->xl_size == (bh->b_size - | |
1645 | offsetof(struct ocfs2_xattr_block, | |
1646 | xb_attrs.xb_header))) | |
1647 | vb->vb_access = ocfs2_journal_access_xb; | |
1648 | else | |
1649 | vb->vb_access = ocfs2_journal_access_di; | |
1650 | vb->vb_bh = bh; | |
1651 | } | |
1652 | ||
11179f2c JB |
1653 | /* |
1654 | * Operations for xattrs stored in blocks. This includes inline inode | |
1655 | * storage and unindexed ocfs2_xattr_blocks. | |
1656 | */ | |
1657 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { | |
cf2bc809 JB |
1658 | .xlo_journal_access = ocfs2_xa_block_journal_access, |
1659 | .xlo_journal_dirty = ocfs2_xa_block_journal_dirty, | |
11179f2c | 1660 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, |
69a3e539 JB |
1661 | .xlo_check_space = ocfs2_xa_block_check_space, |
1662 | .xlo_can_reuse = ocfs2_xa_block_can_reuse, | |
1663 | .xlo_get_free_start = ocfs2_xa_block_get_free_start, | |
11179f2c | 1664 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, |
69a3e539 JB |
1665 | .xlo_add_entry = ocfs2_xa_block_add_entry, |
1666 | .xlo_add_namevalue = ocfs2_xa_block_add_namevalue, | |
3fc12afa | 1667 | .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf, |
11179f2c JB |
1668 | }; |
1669 | ||
cf2bc809 JB |
1670 | static int ocfs2_xa_bucket_journal_access(handle_t *handle, |
1671 | struct ocfs2_xa_loc *loc, int type) | |
1672 | { | |
1673 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1674 | ||
1675 | return ocfs2_xattr_bucket_journal_access(handle, bucket, type); | |
1676 | } | |
1677 | ||
1678 | static void ocfs2_xa_bucket_journal_dirty(handle_t *handle, | |
1679 | struct ocfs2_xa_loc *loc) | |
1680 | { | |
1681 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1682 | ||
1683 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
1684 | } | |
1685 | ||
11179f2c JB |
1686 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, |
1687 | int offset) | |
1688 | { | |
1689 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1690 | int block, block_offset; | |
1691 | ||
11179f2c | 1692 | /* The header is at the front of the bucket */ |
cf2bc809 JB |
1693 | block = offset >> loc->xl_inode->i_sb->s_blocksize_bits; |
1694 | block_offset = offset % loc->xl_inode->i_sb->s_blocksize; | |
11179f2c JB |
1695 | |
1696 | return bucket_block(bucket, block) + block_offset; | |
1697 | } | |
1698 | ||
69a3e539 JB |
1699 | static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc, |
1700 | struct ocfs2_xattr_info *xi) | |
1701 | { | |
1702 | return namevalue_size_xe(loc->xl_entry) >= | |
1703 | namevalue_size_xi(xi); | |
1704 | } | |
1705 | ||
1706 | static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc) | |
1707 | { | |
1708 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1709 | return le16_to_cpu(bucket_xh(bucket)->xh_free_start); | |
1710 | } | |
1711 | ||
1712 | static int ocfs2_bucket_align_free_start(struct super_block *sb, | |
1713 | int free_start, int size) | |
1714 | { | |
1715 | /* | |
1716 | * We need to make sure that the name+value pair fits within | |
1717 | * one block. | |
1718 | */ | |
1719 | if (((free_start - size) >> sb->s_blocksize_bits) != | |
1720 | ((free_start - 1) >> sb->s_blocksize_bits)) | |
1721 | free_start -= free_start % sb->s_blocksize; | |
1722 | ||
1723 | return free_start; | |
1724 | } | |
1725 | ||
1726 | static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc, | |
1727 | struct ocfs2_xattr_info *xi) | |
1728 | { | |
1729 | int rc; | |
1730 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1731 | int free_start = ocfs2_xa_get_free_start(loc); | |
1732 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1733 | int size = namevalue_size_xi(xi); | |
cf2bc809 | 1734 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1735 | |
1736 | /* | |
1737 | * Bucket storage does not reclaim name+value pairs it cannot | |
1738 | * reuse. They live as holes until the bucket fills, and then | |
1739 | * the bucket is defragmented. However, the bucket can reclaim | |
1740 | * the ocfs2_xattr_entry. | |
1741 | */ | |
1742 | if (loc->xl_entry) { | |
1743 | /* Don't need space if we're reusing! */ | |
1744 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1745 | needed_space = 0; | |
1746 | else | |
1747 | needed_space -= sizeof(struct ocfs2_xattr_entry); | |
1748 | } | |
1749 | BUG_ON(needed_space < 0); | |
1750 | ||
1751 | if (free_start < size) { | |
1752 | if (needed_space) | |
1753 | return -ENOSPC; | |
1754 | } else { | |
1755 | /* | |
1756 | * First we check if it would fit in the first place. | |
1757 | * Below, we align the free start to a block. This may | |
1758 | * slide us below the minimum gap. By checking unaligned | |
1759 | * first, we avoid that error. | |
1760 | */ | |
1761 | rc = ocfs2_xa_check_space_helper(needed_space, free_start, | |
1762 | count); | |
1763 | if (rc) | |
1764 | return rc; | |
1765 | free_start = ocfs2_bucket_align_free_start(sb, free_start, | |
1766 | size); | |
1767 | } | |
1768 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1769 | } | |
1770 | ||
11179f2c JB |
1771 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) |
1772 | { | |
199799a3 JB |
1773 | le16_add_cpu(&loc->xl_header->xh_name_value_len, |
1774 | -namevalue_size_xe(loc->xl_entry)); | |
11179f2c JB |
1775 | } |
1776 | ||
69a3e539 JB |
1777 | static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1778 | { | |
1779 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1780 | int count = le16_to_cpu(xh->xh_count); | |
1781 | int low = 0, high = count - 1, tmp; | |
1782 | struct ocfs2_xattr_entry *tmp_xe; | |
1783 | ||
1784 | /* | |
1785 | * We keep buckets sorted by name_hash, so we need to find | |
1786 | * our insert place. | |
1787 | */ | |
1788 | while (low <= high && count) { | |
1789 | tmp = (low + high) / 2; | |
1790 | tmp_xe = &xh->xh_entries[tmp]; | |
1791 | ||
1792 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
1793 | low = tmp + 1; | |
1794 | else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash)) | |
1795 | high = tmp - 1; | |
1796 | else { | |
1797 | low = tmp; | |
1798 | break; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | if (low != count) | |
1803 | memmove(&xh->xh_entries[low + 1], | |
1804 | &xh->xh_entries[low], | |
1805 | ((count - low) * sizeof(struct ocfs2_xattr_entry))); | |
1806 | ||
1807 | le16_add_cpu(&xh->xh_count, 1); | |
1808 | loc->xl_entry = &xh->xh_entries[low]; | |
1809 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1810 | } | |
1811 | ||
1812 | static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1813 | { | |
1814 | int free_start = ocfs2_xa_get_free_start(loc); | |
1815 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
cf2bc809 | 1816 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1817 | int nameval_offset; |
1818 | ||
1819 | free_start = ocfs2_bucket_align_free_start(sb, free_start, size); | |
1820 | nameval_offset = free_start - size; | |
1821 | loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset); | |
1822 | xh->xh_free_start = cpu_to_le16(nameval_offset); | |
1823 | le16_add_cpu(&xh->xh_name_value_len, size); | |
1824 | ||
1825 | } | |
1826 | ||
3fc12afa JB |
1827 | static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc, |
1828 | struct ocfs2_xattr_value_buf *vb) | |
1829 | { | |
1830 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
cf2bc809 | 1831 | struct super_block *sb = loc->xl_inode->i_sb; |
3fc12afa JB |
1832 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
1833 | int size = namevalue_size_xe(loc->xl_entry); | |
1834 | int block_offset = nameval_offset >> sb->s_blocksize_bits; | |
1835 | ||
1836 | /* Values are not allowed to straddle block boundaries */ | |
1837 | BUG_ON(block_offset != | |
1838 | ((nameval_offset + size - 1) >> sb->s_blocksize_bits)); | |
1839 | /* We expect the bucket to be filled in */ | |
1840 | BUG_ON(!bucket->bu_bhs[block_offset]); | |
1841 | ||
1842 | vb->vb_access = ocfs2_journal_access; | |
1843 | vb->vb_bh = bucket->bu_bhs[block_offset]; | |
1844 | } | |
1845 | ||
11179f2c JB |
1846 | /* Operations for xattrs stored in buckets. */ |
1847 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { | |
cf2bc809 JB |
1848 | .xlo_journal_access = ocfs2_xa_bucket_journal_access, |
1849 | .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty, | |
11179f2c | 1850 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, |
69a3e539 JB |
1851 | .xlo_check_space = ocfs2_xa_bucket_check_space, |
1852 | .xlo_can_reuse = ocfs2_xa_bucket_can_reuse, | |
1853 | .xlo_get_free_start = ocfs2_xa_bucket_get_free_start, | |
11179f2c | 1854 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, |
69a3e539 JB |
1855 | .xlo_add_entry = ocfs2_xa_bucket_add_entry, |
1856 | .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue, | |
3fc12afa | 1857 | .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf, |
11179f2c JB |
1858 | }; |
1859 | ||
399ff3a7 JB |
1860 | static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc) |
1861 | { | |
1862 | struct ocfs2_xattr_value_buf vb; | |
1863 | ||
1864 | if (ocfs2_xattr_is_local(loc->xl_entry)) | |
1865 | return 0; | |
1866 | ||
1867 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1868 | return le32_to_cpu(vb.vb_xv->xr_clusters); | |
1869 | } | |
1870 | ||
73857ee0 JB |
1871 | static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes, |
1872 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1873 | { | |
1874 | int trunc_rc, access_rc; | |
1875 | struct ocfs2_xattr_value_buf vb; | |
1876 | ||
1877 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1878 | trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes, | |
1879 | ctxt); | |
1880 | ||
1881 | /* | |
1882 | * The caller of ocfs2_xa_value_truncate() has already called | |
1883 | * ocfs2_xa_journal_access on the loc. However, The truncate code | |
1884 | * calls ocfs2_extend_trans(). This may commit the previous | |
1885 | * transaction and open a new one. If this is a bucket, truncate | |
1886 | * could leave only vb->vb_bh set up for journaling. Meanwhile, | |
1887 | * the caller is expecting to dirty the entire bucket. So we must | |
1888 | * reset the journal work. We do this even if truncate has failed, | |
1889 | * as it could have failed after committing the extend. | |
1890 | */ | |
1891 | access_rc = ocfs2_xa_journal_access(ctxt->handle, loc, | |
1892 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1893 | ||
1894 | /* Errors in truncate take precedence */ | |
1895 | return trunc_rc ? trunc_rc : access_rc; | |
1896 | } | |
1897 | ||
11179f2c JB |
1898 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) |
1899 | { | |
bde1e540 JB |
1900 | int index, count; |
1901 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1902 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1903 | ||
11179f2c | 1904 | ocfs2_xa_wipe_namevalue(loc); |
bde1e540 JB |
1905 | loc->xl_entry = NULL; |
1906 | ||
1907 | le16_add_cpu(&xh->xh_count, -1); | |
1908 | count = le16_to_cpu(xh->xh_count); | |
1909 | ||
1910 | /* | |
1911 | * Only zero out the entry if there are more remaining. This is | |
1912 | * important for an empty bucket, as it keeps track of the | |
1913 | * bucket's hash value. It doesn't hurt empty block storage. | |
1914 | */ | |
1915 | if (count) { | |
1916 | index = ((char *)entry - (char *)&xh->xh_entries) / | |
1917 | sizeof(struct ocfs2_xattr_entry); | |
1918 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], | |
1919 | (count - index) * sizeof(struct ocfs2_xattr_entry)); | |
1920 | memset(&xh->xh_entries[count], 0, | |
1921 | sizeof(struct ocfs2_xattr_entry)); | |
1922 | } | |
11179f2c JB |
1923 | } |
1924 | ||
399ff3a7 JB |
1925 | /* |
1926 | * If we have a problem adjusting the size of an external value during | |
1927 | * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr | |
1928 | * in an intermediate state. For example, the value may be partially | |
1929 | * truncated. | |
1930 | * | |
1931 | * If the value tree hasn't changed, the extend/truncate went nowhere. | |
1932 | * We have nothing to do. The caller can treat it as a straight error. | |
1933 | * | |
1934 | * If the value tree got partially truncated, we now have a corrupted | |
1935 | * extended attribute. We're going to wipe its entry and leak the | |
1936 | * clusters. Better to leak some storage than leave a corrupt entry. | |
1937 | * | |
1938 | * If the value tree grew, it obviously didn't grow enough for the | |
1939 | * new entry. We're not going to try and reclaim those clusters either. | |
1940 | * If there was already an external value there (orig_clusters != 0), | |
1941 | * the new clusters are attached safely and we can just leave the old | |
1942 | * value in place. If there was no external value there, we remove | |
1943 | * the entry. | |
1944 | * | |
1945 | * This way, the xattr block we store in the journal will be consistent. | |
1946 | * If the size change broke because of the journal, no changes will hit | |
1947 | * disk anyway. | |
1948 | */ | |
1949 | static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc, | |
1950 | const char *what, | |
1951 | unsigned int orig_clusters) | |
1952 | { | |
1953 | unsigned int new_clusters = ocfs2_xa_value_clusters(loc); | |
1954 | char *nameval_buf = ocfs2_xa_offset_pointer(loc, | |
1955 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
1956 | ||
1957 | if (new_clusters < orig_clusters) { | |
1958 | mlog(ML_ERROR, | |
1959 | "Partial truncate while %s xattr %.*s. Leaking " | |
1960 | "%u clusters and removing the entry\n", | |
1961 | what, loc->xl_entry->xe_name_len, nameval_buf, | |
1962 | orig_clusters - new_clusters); | |
1963 | ocfs2_xa_remove_entry(loc); | |
1964 | } else if (!orig_clusters) { | |
1965 | mlog(ML_ERROR, | |
1966 | "Unable to allocate an external value for xattr " | |
1967 | "%.*s safely. Leaking %u clusters and removing the " | |
1968 | "entry\n", | |
1969 | loc->xl_entry->xe_name_len, nameval_buf, | |
1970 | new_clusters - orig_clusters); | |
1971 | ocfs2_xa_remove_entry(loc); | |
1972 | } else if (new_clusters > orig_clusters) | |
1973 | mlog(ML_ERROR, | |
1974 | "Unable to grow xattr %.*s safely. %u new clusters " | |
1975 | "have been added, but the value will not be " | |
1976 | "modified\n", | |
1977 | loc->xl_entry->xe_name_len, nameval_buf, | |
1978 | new_clusters - orig_clusters); | |
1979 | } | |
1980 | ||
73857ee0 JB |
1981 | static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc, |
1982 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1983 | { | |
1984 | int rc = 0; | |
399ff3a7 | 1985 | unsigned int orig_clusters; |
73857ee0 JB |
1986 | |
1987 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { | |
399ff3a7 | 1988 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
1989 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
1990 | if (rc) { | |
1991 | mlog_errno(rc); | |
399ff3a7 JB |
1992 | /* |
1993 | * Since this is remove, we can return 0 if | |
1994 | * ocfs2_xa_cleanup_value_truncate() is going to | |
1995 | * wipe the entry anyway. So we check the | |
1996 | * cluster count as well. | |
1997 | */ | |
1998 | if (orig_clusters != ocfs2_xa_value_clusters(loc)) | |
1999 | rc = 0; | |
2000 | ocfs2_xa_cleanup_value_truncate(loc, "removing", | |
2001 | orig_clusters); | |
2002 | if (rc) | |
2003 | goto out; | |
73857ee0 JB |
2004 | } |
2005 | } | |
2006 | ||
2007 | ocfs2_xa_remove_entry(loc); | |
2008 | ||
2009 | out: | |
2010 | return rc; | |
2011 | } | |
2012 | ||
2013 | static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc) | |
2014 | { | |
2015 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
2016 | char *nameval_buf; | |
2017 | ||
2018 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2019 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2020 | memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE); | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | * Take an existing entry and make it ready for the new value. This | |
2025 | * won't allocate space, but it may free space. It should be ready for | |
2026 | * ocfs2_xa_prepare_entry() to finish the work. | |
2027 | */ | |
2028 | static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc, | |
2029 | struct ocfs2_xattr_info *xi, | |
2030 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2031 | { | |
2032 | int rc = 0; | |
2033 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
399ff3a7 | 2034 | unsigned int orig_clusters; |
73857ee0 JB |
2035 | char *nameval_buf; |
2036 | int xe_local = ocfs2_xattr_is_local(loc->xl_entry); | |
2037 | int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE; | |
2038 | ||
2039 | BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) != | |
2040 | name_size); | |
2041 | ||
2042 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2043 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2044 | if (xe_local) { | |
2045 | memset(nameval_buf + name_size, 0, | |
2046 | namevalue_size_xe(loc->xl_entry) - name_size); | |
2047 | if (!xi_local) | |
2048 | ocfs2_xa_install_value_root(loc); | |
2049 | } else { | |
399ff3a7 | 2050 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2051 | if (xi_local) { |
2052 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); | |
399ff3a7 | 2053 | if (rc < 0) |
73857ee0 | 2054 | mlog_errno(rc); |
399ff3a7 JB |
2055 | else |
2056 | memset(nameval_buf + name_size, 0, | |
2057 | namevalue_size_xe(loc->xl_entry) - | |
2058 | name_size); | |
73857ee0 JB |
2059 | } else if (le64_to_cpu(loc->xl_entry->xe_value_size) > |
2060 | xi->xi_value_len) { | |
2061 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, | |
2062 | ctxt); | |
399ff3a7 | 2063 | if (rc < 0) |
73857ee0 | 2064 | mlog_errno(rc); |
399ff3a7 JB |
2065 | } |
2066 | ||
2067 | if (rc) { | |
2068 | ocfs2_xa_cleanup_value_truncate(loc, "reusing", | |
2069 | orig_clusters); | |
2070 | goto out; | |
73857ee0 JB |
2071 | } |
2072 | } | |
2073 | ||
2074 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
2075 | ocfs2_xattr_set_local(loc->xl_entry, xi_local); | |
2076 | ||
2077 | out: | |
2078 | return rc; | |
2079 | } | |
2080 | ||
69a3e539 JB |
2081 | /* |
2082 | * Prepares loc->xl_entry to receive the new xattr. This includes | |
2083 | * properly setting up the name+value pair region. If loc->xl_entry | |
2084 | * already exists, it will take care of modifying it appropriately. | |
69a3e539 JB |
2085 | * |
2086 | * Note that this modifies the data. You did journal_access already, | |
2087 | * right? | |
2088 | */ | |
2089 | static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc, | |
2090 | struct ocfs2_xattr_info *xi, | |
73857ee0 JB |
2091 | u32 name_hash, |
2092 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 JB |
2093 | { |
2094 | int rc = 0; | |
399ff3a7 JB |
2095 | unsigned int orig_clusters; |
2096 | __le64 orig_value_size = 0; | |
69a3e539 | 2097 | |
69a3e539 JB |
2098 | rc = ocfs2_xa_check_space(loc, xi); |
2099 | if (rc) | |
2100 | goto out; | |
2101 | ||
2102 | if (loc->xl_entry) { | |
2103 | if (ocfs2_xa_can_reuse_entry(loc, xi)) { | |
399ff3a7 | 2104 | orig_value_size = loc->xl_entry->xe_value_size; |
73857ee0 JB |
2105 | rc = ocfs2_xa_reuse_entry(loc, xi, ctxt); |
2106 | if (rc) | |
2107 | goto out; | |
2108 | goto alloc_value; | |
69a3e539 JB |
2109 | } |
2110 | ||
73857ee0 | 2111 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
399ff3a7 | 2112 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2113 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2114 | if (rc) { | |
2115 | mlog_errno(rc); | |
399ff3a7 JB |
2116 | ocfs2_xa_cleanup_value_truncate(loc, |
2117 | "overwriting", | |
2118 | orig_clusters); | |
73857ee0 JB |
2119 | goto out; |
2120 | } | |
2121 | } | |
69a3e539 JB |
2122 | ocfs2_xa_wipe_namevalue(loc); |
2123 | } else | |
2124 | ocfs2_xa_add_entry(loc, name_hash); | |
2125 | ||
2126 | /* | |
2127 | * If we get here, we have a blank entry. Fill it. We grow our | |
2128 | * name+value pair back from the end. | |
2129 | */ | |
2130 | ocfs2_xa_add_namevalue(loc, xi); | |
73857ee0 JB |
2131 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
2132 | ocfs2_xa_install_value_root(loc); | |
2133 | ||
2134 | alloc_value: | |
2135 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { | |
399ff3a7 | 2136 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 | 2137 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt); |
399ff3a7 | 2138 | if (rc < 0) { |
5f5261ac | 2139 | ctxt->set_abort = 1; |
399ff3a7 JB |
2140 | ocfs2_xa_cleanup_value_truncate(loc, "growing", |
2141 | orig_clusters); | |
d5a7df06 TM |
2142 | /* |
2143 | * If we were growing an existing value, | |
2144 | * ocfs2_xa_cleanup_value_truncate() won't remove | |
2145 | * the entry. We need to restore the original value | |
2146 | * size. | |
2147 | */ | |
2148 | if (loc->xl_entry) { | |
2149 | BUG_ON(!orig_value_size); | |
2150 | loc->xl_entry->xe_value_size = orig_value_size; | |
2151 | } | |
73857ee0 | 2152 | mlog_errno(rc); |
399ff3a7 | 2153 | } |
73857ee0 | 2154 | } |
69a3e539 JB |
2155 | |
2156 | out: | |
2157 | return rc; | |
2158 | } | |
2159 | ||
2160 | /* | |
73857ee0 JB |
2161 | * Store the value portion of the name+value pair. This will skip |
2162 | * values that are stored externally. Their tree roots were set up | |
2163 | * by ocfs2_xa_prepare_entry(). | |
69a3e539 | 2164 | */ |
73857ee0 JB |
2165 | static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc, |
2166 | struct ocfs2_xattr_info *xi, | |
2167 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 | 2168 | { |
73857ee0 | 2169 | int rc = 0; |
69a3e539 JB |
2170 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
2171 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
69a3e539 | 2172 | char *nameval_buf; |
73857ee0 | 2173 | struct ocfs2_xattr_value_buf vb; |
69a3e539 | 2174 | |
69a3e539 | 2175 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
73857ee0 JB |
2176 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
2177 | ocfs2_xa_fill_value_buf(loc, &vb); | |
2178 | rc = __ocfs2_xattr_set_value_outside(loc->xl_inode, | |
2179 | ctxt->handle, &vb, | |
2180 | xi->xi_value, | |
2181 | xi->xi_value_len); | |
2182 | } else | |
2183 | memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len); | |
2184 | ||
73857ee0 | 2185 | return rc; |
69a3e539 JB |
2186 | } |
2187 | ||
bca5e9bd JB |
2188 | static int ocfs2_xa_set(struct ocfs2_xa_loc *loc, |
2189 | struct ocfs2_xattr_info *xi, | |
2190 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2191 | { | |
2192 | int ret; | |
2193 | u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name, | |
2194 | xi->xi_name_len); | |
2195 | ||
2196 | ret = ocfs2_xa_journal_access(ctxt->handle, loc, | |
2197 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2198 | if (ret) { | |
2199 | mlog_errno(ret); | |
2200 | goto out; | |
2201 | } | |
2202 | ||
399ff3a7 JB |
2203 | /* |
2204 | * From here on out, everything is going to modify the buffer a | |
2205 | * little. Errors are going to leave the xattr header in a | |
2206 | * sane state. Thus, even with errors we dirty the sucker. | |
2207 | */ | |
2208 | ||
bca5e9bd JB |
2209 | /* Don't worry, we are never called with !xi_value and !xl_entry */ |
2210 | if (!xi->xi_value) { | |
2211 | ret = ocfs2_xa_remove(loc, ctxt); | |
399ff3a7 | 2212 | goto out_dirty; |
bca5e9bd JB |
2213 | } |
2214 | ||
2215 | ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt); | |
2216 | if (ret) { | |
2217 | if (ret != -ENOSPC) | |
2218 | mlog_errno(ret); | |
399ff3a7 | 2219 | goto out_dirty; |
bca5e9bd JB |
2220 | } |
2221 | ||
2222 | ret = ocfs2_xa_store_value(loc, xi, ctxt); | |
399ff3a7 | 2223 | if (ret) |
bca5e9bd | 2224 | mlog_errno(ret); |
bca5e9bd | 2225 | |
399ff3a7 | 2226 | out_dirty: |
bca5e9bd JB |
2227 | ocfs2_xa_journal_dirty(ctxt->handle, loc); |
2228 | ||
2229 | out: | |
2230 | return ret; | |
2231 | } | |
2232 | ||
11179f2c JB |
2233 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, |
2234 | struct inode *inode, | |
2235 | struct buffer_head *bh, | |
2236 | struct ocfs2_xattr_entry *entry) | |
2237 | { | |
2238 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; | |
2239 | ||
139fface JB |
2240 | BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL)); |
2241 | ||
cf2bc809 | 2242 | loc->xl_inode = inode; |
11179f2c JB |
2243 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2244 | loc->xl_storage = bh; | |
2245 | loc->xl_entry = entry; | |
139fface | 2246 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); |
11179f2c JB |
2247 | loc->xl_header = |
2248 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - | |
2249 | loc->xl_size); | |
2250 | } | |
2251 | ||
2252 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, | |
cf2bc809 | 2253 | struct inode *inode, |
11179f2c JB |
2254 | struct buffer_head *bh, |
2255 | struct ocfs2_xattr_entry *entry) | |
2256 | { | |
2257 | struct ocfs2_xattr_block *xb = | |
2258 | (struct ocfs2_xattr_block *)bh->b_data; | |
2259 | ||
2260 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); | |
2261 | ||
cf2bc809 | 2262 | loc->xl_inode = inode; |
11179f2c JB |
2263 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2264 | loc->xl_storage = bh; | |
2265 | loc->xl_header = &(xb->xb_attrs.xb_header); | |
2266 | loc->xl_entry = entry; | |
2267 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, | |
2268 | xb_attrs.xb_header); | |
2269 | } | |
2270 | ||
2271 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, | |
2272 | struct ocfs2_xattr_bucket *bucket, | |
2273 | struct ocfs2_xattr_entry *entry) | |
2274 | { | |
cf2bc809 | 2275 | loc->xl_inode = bucket->bu_inode; |
11179f2c JB |
2276 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; |
2277 | loc->xl_storage = bucket; | |
2278 | loc->xl_header = bucket_xh(bucket); | |
2279 | loc->xl_entry = entry; | |
2280 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; | |
2281 | } | |
2282 | ||
ce9c5a54 TM |
2283 | /* |
2284 | * In xattr remove, if it is stored outside and refcounted, we may have | |
2285 | * the chance to split the refcount tree. So need the allocators. | |
2286 | */ | |
2287 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
2288 | struct ocfs2_xattr_value_root *xv, | |
2289 | struct ocfs2_caching_info *ref_ci, | |
2290 | struct buffer_head *ref_root_bh, | |
2291 | struct ocfs2_alloc_context **meta_ac, | |
2292 | int *ref_credits) | |
2293 | { | |
2294 | int ret, meta_add = 0; | |
2295 | u32 p_cluster, num_clusters; | |
2296 | unsigned int ext_flags; | |
2297 | ||
2298 | *ref_credits = 0; | |
2299 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
2300 | &num_clusters, | |
2301 | &xv->xr_list, | |
2302 | &ext_flags); | |
2303 | if (ret) { | |
2304 | mlog_errno(ret); | |
2305 | goto out; | |
2306 | } | |
2307 | ||
2308 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
2309 | goto out; | |
2310 | ||
2311 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
2312 | ref_root_bh, xv, | |
2313 | &meta_add, ref_credits); | |
2314 | if (ret) { | |
2315 | mlog_errno(ret); | |
2316 | goto out; | |
2317 | } | |
2318 | ||
2319 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
2320 | meta_add, meta_ac); | |
2321 | if (ret) | |
2322 | mlog_errno(ret); | |
2323 | ||
2324 | out: | |
2325 | return ret; | |
2326 | } | |
2327 | ||
cf1d6c76 | 2328 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 2329 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
2330 | struct ocfs2_xattr_header *header, |
2331 | struct ocfs2_caching_info *ref_ci, | |
2332 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 2333 | { |
ce9c5a54 | 2334 | int ret = 0, i, ref_credits; |
78f30c31 TM |
2335 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2336 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 2337 | void *val; |
78f30c31 TM |
2338 | |
2339 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
2340 | |
2341 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
2342 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
2343 | ||
ce9c5a54 TM |
2344 | if (ocfs2_xattr_is_local(entry)) |
2345 | continue; | |
cf1d6c76 | 2346 | |
ce9c5a54 TM |
2347 | val = (void *)header + |
2348 | le16_to_cpu(entry->xe_name_offset); | |
2349 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
2350 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
2351 | ||
2352 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
2353 | ref_ci, ref_root_bh, | |
2354 | &ctxt.meta_ac, | |
2355 | &ref_credits); | |
2356 | ||
2357 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
2358 | ocfs2_remove_extent_credits(osb->sb)); | |
2359 | if (IS_ERR(ctxt.handle)) { | |
2360 | ret = PTR_ERR(ctxt.handle); | |
2361 | mlog_errno(ret); | |
2362 | break; | |
2363 | } | |
2364 | ||
2365 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
2366 | if (ret < 0) { | |
2367 | mlog_errno(ret); | |
2368 | break; | |
2369 | } | |
2370 | ||
2371 | ocfs2_commit_trans(osb, ctxt.handle); | |
2372 | if (ctxt.meta_ac) { | |
2373 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2374 | ctxt.meta_ac = NULL; | |
cf1d6c76 TY |
2375 | } |
2376 | } | |
2377 | ||
ce9c5a54 TM |
2378 | if (ctxt.meta_ac) |
2379 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
2380 | ocfs2_schedule_truncate_log_flush(osb, 1); |
2381 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2382 | return ret; |
2383 | } | |
2384 | ||
2385 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
2386 | struct buffer_head *di_bh, |
2387 | struct ocfs2_caching_info *ref_ci, | |
2388 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2389 | { |
2390 | ||
2391 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2392 | struct ocfs2_xattr_header *header; | |
2393 | int ret; | |
4311901d JB |
2394 | struct ocfs2_xattr_value_buf vb = { |
2395 | .vb_bh = di_bh, | |
2396 | .vb_access = ocfs2_journal_access_di, | |
2397 | }; | |
cf1d6c76 TY |
2398 | |
2399 | header = (struct ocfs2_xattr_header *) | |
2400 | ((void *)di + inode->i_sb->s_blocksize - | |
2401 | le16_to_cpu(di->i_xattr_inline_size)); | |
2402 | ||
ce9c5a54 TM |
2403 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2404 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2405 | |
2406 | return ret; | |
2407 | } | |
2408 | ||
ce9c5a54 TM |
2409 | struct ocfs2_rm_xattr_bucket_para { |
2410 | struct ocfs2_caching_info *ref_ci; | |
2411 | struct buffer_head *ref_root_bh; | |
2412 | }; | |
2413 | ||
cf1d6c76 | 2414 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
2415 | struct buffer_head *blk_bh, |
2416 | struct ocfs2_caching_info *ref_ci, | |
2417 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2418 | { |
2419 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 2420 | int ret = 0; |
4311901d JB |
2421 | struct ocfs2_xattr_value_buf vb = { |
2422 | .vb_bh = blk_bh, | |
2423 | .vb_access = ocfs2_journal_access_xb, | |
2424 | }; | |
ce9c5a54 TM |
2425 | struct ocfs2_rm_xattr_bucket_para args = { |
2426 | .ref_ci = ref_ci, | |
2427 | .ref_root_bh = ref_root_bh, | |
2428 | }; | |
cf1d6c76 TY |
2429 | |
2430 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
2431 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
2432 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
2433 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2434 | ref_ci, ref_root_bh); | |
a3944256 | 2435 | } else |
47bca495 TM |
2436 | ret = ocfs2_iterate_xattr_index_block(inode, |
2437 | blk_bh, | |
2438 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 2439 | &args); |
cf1d6c76 TY |
2440 | |
2441 | return ret; | |
2442 | } | |
2443 | ||
08413899 | 2444 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
2445 | u64 block, |
2446 | struct ocfs2_caching_info *ref_ci, | |
2447 | struct buffer_head *ref_root_bh) | |
08413899 TM |
2448 | { |
2449 | struct inode *xb_alloc_inode; | |
2450 | struct buffer_head *xb_alloc_bh = NULL; | |
2451 | struct buffer_head *blk_bh = NULL; | |
2452 | struct ocfs2_xattr_block *xb; | |
2453 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2454 | handle_t *handle; | |
2455 | int ret = 0; | |
2456 | u64 blk, bg_blkno; | |
2457 | u16 bit; | |
2458 | ||
4ae1d69b | 2459 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
2460 | if (ret < 0) { |
2461 | mlog_errno(ret); | |
2462 | goto out; | |
2463 | } | |
2464 | ||
ce9c5a54 | 2465 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
2466 | if (ret < 0) { |
2467 | mlog_errno(ret); | |
2468 | goto out; | |
2469 | } | |
2470 | ||
4ae1d69b | 2471 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
2472 | blk = le64_to_cpu(xb->xb_blkno); |
2473 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
74380c47 TM |
2474 | if (xb->xb_suballoc_loc) |
2475 | bg_blkno = le64_to_cpu(xb->xb_suballoc_loc); | |
2476 | else | |
2477 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
08413899 TM |
2478 | |
2479 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2480 | EXTENT_ALLOC_SYSTEM_INODE, | |
2481 | le16_to_cpu(xb->xb_suballoc_slot)); | |
2482 | if (!xb_alloc_inode) { | |
2483 | ret = -ENOMEM; | |
2484 | mlog_errno(ret); | |
2485 | goto out; | |
2486 | } | |
2487 | mutex_lock(&xb_alloc_inode->i_mutex); | |
2488 | ||
2489 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
2490 | if (ret < 0) { | |
2491 | mlog_errno(ret); | |
2492 | goto out_mutex; | |
2493 | } | |
2494 | ||
2495 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
2496 | if (IS_ERR(handle)) { | |
2497 | ret = PTR_ERR(handle); | |
2498 | mlog_errno(ret); | |
2499 | goto out_unlock; | |
2500 | } | |
2501 | ||
2502 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
2503 | bit, bg_blkno, 1); | |
2504 | if (ret < 0) | |
2505 | mlog_errno(ret); | |
2506 | ||
2507 | ocfs2_commit_trans(osb, handle); | |
2508 | out_unlock: | |
2509 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
2510 | brelse(xb_alloc_bh); | |
2511 | out_mutex: | |
2512 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
2513 | iput(xb_alloc_inode); | |
2514 | out: | |
2515 | brelse(blk_bh); | |
2516 | return ret; | |
2517 | } | |
2518 | ||
cf1d6c76 TY |
2519 | /* |
2520 | * ocfs2_xattr_remove() | |
2521 | * | |
2522 | * Free extended attribute resources associated with this inode. | |
2523 | */ | |
2524 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2525 | { | |
cf1d6c76 TY |
2526 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2527 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2528 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2529 | struct buffer_head *ref_root_bh = NULL; | |
2530 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2531 | handle_t *handle; |
2532 | int ret; | |
2533 | ||
8154da3d TY |
2534 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2535 | return 0; | |
2536 | ||
cf1d6c76 TY |
2537 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2538 | return 0; | |
2539 | ||
ce9c5a54 TM |
2540 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
2541 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), | |
2542 | le64_to_cpu(di->i_refcount_loc), | |
2543 | 1, &ref_tree, &ref_root_bh); | |
2544 | if (ret) { | |
2545 | mlog_errno(ret); | |
2546 | goto out; | |
2547 | } | |
2548 | ref_ci = &ref_tree->rf_ci; | |
2549 | ||
2550 | } | |
2551 | ||
cf1d6c76 | 2552 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2553 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2554 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2555 | if (ret < 0) { |
2556 | mlog_errno(ret); | |
2557 | goto out; | |
2558 | } | |
2559 | } | |
cf1d6c76 | 2560 | |
08413899 TM |
2561 | if (di->i_xattr_loc) { |
2562 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2563 | le64_to_cpu(di->i_xattr_loc), |
2564 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2565 | if (ret < 0) { |
2566 | mlog_errno(ret); | |
2567 | goto out; | |
2568 | } | |
2569 | } | |
2570 | ||
2571 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2572 | OCFS2_INODE_UPDATE_CREDITS); | |
2573 | if (IS_ERR(handle)) { | |
2574 | ret = PTR_ERR(handle); | |
2575 | mlog_errno(ret); | |
2576 | goto out; | |
2577 | } | |
0cf2f763 | 2578 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2579 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2580 | if (ret) { |
2581 | mlog_errno(ret); | |
2582 | goto out_commit; | |
2583 | } | |
2584 | ||
08413899 | 2585 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2586 | |
2587 | spin_lock(&oi->ip_lock); | |
2588 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2589 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2590 | spin_unlock(&oi->ip_lock); | |
2591 | ||
ec20cec7 | 2592 | ocfs2_journal_dirty(handle, di_bh); |
cf1d6c76 TY |
2593 | out_commit: |
2594 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2595 | out: | |
ce9c5a54 TM |
2596 | if (ref_tree) |
2597 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2598 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2599 | return ret; |
2600 | } | |
2601 | ||
2602 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2603 | struct ocfs2_dinode *di) | |
2604 | { | |
2605 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2606 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2607 | int free; | |
2608 | ||
2609 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2610 | return 0; | |
2611 | ||
2612 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2613 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2614 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2615 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2616 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2617 | le64_to_cpu(di->i_size); | |
2618 | } else { | |
2619 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2620 | free = (le16_to_cpu(el->l_count) - | |
2621 | le16_to_cpu(el->l_next_free_rec)) * | |
2622 | sizeof(struct ocfs2_extent_rec); | |
2623 | } | |
2624 | if (free >= xattrsize) | |
2625 | return 1; | |
2626 | ||
2627 | return 0; | |
2628 | } | |
2629 | ||
2630 | /* | |
2631 | * ocfs2_xattr_ibody_find() | |
2632 | * | |
2633 | * Find extended attribute in inode block and | |
2634 | * fill search info into struct ocfs2_xattr_search. | |
2635 | */ | |
2636 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2637 | int name_index, | |
2638 | const char *name, | |
2639 | struct ocfs2_xattr_search *xs) | |
2640 | { | |
2641 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2642 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2643 | int ret; | |
2644 | int has_space = 0; | |
2645 | ||
2646 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2647 | return 0; | |
2648 | ||
2649 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2650 | down_read(&oi->ip_alloc_sem); | |
2651 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2652 | up_read(&oi->ip_alloc_sem); | |
2653 | if (!has_space) | |
2654 | return 0; | |
2655 | } | |
2656 | ||
2657 | xs->xattr_bh = xs->inode_bh; | |
2658 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2659 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2660 | xs->header = (struct ocfs2_xattr_header *) | |
2661 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2662 | else | |
2663 | xs->header = (struct ocfs2_xattr_header *) | |
2664 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2665 | xs->base = (void *)xs->header; | |
2666 | xs->here = xs->header->xh_entries; | |
2667 | ||
2668 | /* Find the named attribute. */ | |
2669 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2670 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2671 | if (ret && ret != -ENODATA) | |
2672 | return ret; | |
2673 | xs->not_found = ret; | |
2674 | } | |
2675 | ||
2676 | return 0; | |
2677 | } | |
2678 | ||
139fface JB |
2679 | static int ocfs2_xattr_ibody_init(struct inode *inode, |
2680 | struct buffer_head *di_bh, | |
2681 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2682 | { | |
2683 | int ret; | |
2684 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2685 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2686 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2687 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
2688 | ||
2689 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2690 | ret = -ENOSPC; | |
2691 | goto out; | |
2692 | } | |
2693 | ||
2694 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh, | |
2695 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2696 | if (ret) { | |
2697 | mlog_errno(ret); | |
2698 | goto out; | |
2699 | } | |
2700 | ||
2701 | /* | |
2702 | * Adjust extent record count or inline data size | |
2703 | * to reserve space for extended attribute. | |
2704 | */ | |
2705 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2706 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2707 | le16_add_cpu(&idata->id_count, -xattrsize); | |
2708 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
2709 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2710 | le16_add_cpu(&el->l_count, -(xattrsize / | |
2711 | sizeof(struct ocfs2_extent_rec))); | |
2712 | } | |
2713 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
2714 | ||
2715 | spin_lock(&oi->ip_lock); | |
2716 | oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL; | |
2717 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2718 | spin_unlock(&oi->ip_lock); | |
2719 | ||
ec20cec7 | 2720 | ocfs2_journal_dirty(ctxt->handle, di_bh); |
139fface JB |
2721 | |
2722 | out: | |
2723 | return ret; | |
2724 | } | |
2725 | ||
cf1d6c76 TY |
2726 | /* |
2727 | * ocfs2_xattr_ibody_set() | |
2728 | * | |
2729 | * Set, replace or remove an extended attribute into inode block. | |
2730 | * | |
2731 | */ | |
2732 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2733 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2734 | struct ocfs2_xattr_search *xs, |
2735 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 | 2736 | { |
139fface | 2737 | int ret; |
cf1d6c76 TY |
2738 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2739 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
139fface | 2740 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2741 | |
2742 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2743 | return -ENOSPC; | |
2744 | ||
2745 | down_write(&oi->ip_alloc_sem); | |
2746 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2747 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2748 | ret = -ENOSPC; | |
2749 | goto out; | |
2750 | } | |
2751 | } | |
2752 | ||
139fface JB |
2753 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
2754 | ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt); | |
2755 | if (ret) { | |
2756 | if (ret != -ENOSPC) | |
2757 | mlog_errno(ret); | |
2758 | goto out; | |
2759 | } | |
2760 | } | |
2761 | ||
2762 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, | |
2763 | xs->not_found ? NULL : xs->here); | |
2764 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
2765 | if (ret) { | |
2766 | if (ret != -ENOSPC) | |
2767 | mlog_errno(ret); | |
2768 | goto out; | |
2769 | } | |
2770 | xs->here = loc.xl_entry; | |
2771 | ||
cf1d6c76 TY |
2772 | out: |
2773 | up_write(&oi->ip_alloc_sem); | |
2774 | ||
2775 | return ret; | |
2776 | } | |
2777 | ||
2778 | /* | |
2779 | * ocfs2_xattr_block_find() | |
2780 | * | |
2781 | * Find extended attribute in external block and | |
2782 | * fill search info into struct ocfs2_xattr_search. | |
2783 | */ | |
2784 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2785 | int name_index, | |
2786 | const char *name, | |
2787 | struct ocfs2_xattr_search *xs) | |
2788 | { | |
2789 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2790 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2791 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2792 | int ret = 0; |
2793 | ||
2794 | if (!di->i_xattr_loc) | |
2795 | return ret; | |
2796 | ||
4ae1d69b JB |
2797 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2798 | &blk_bh); | |
cf1d6c76 TY |
2799 | if (ret < 0) { |
2800 | mlog_errno(ret); | |
2801 | return ret; | |
2802 | } | |
f6087fb7 | 2803 | |
cf1d6c76 | 2804 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2805 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2806 | |
2807 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2808 | xs->header = &xb->xb_attrs.xb_header; | |
2809 | xs->base = (void *)xs->header; | |
2810 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2811 | xs->here = xs->header->xh_entries; | |
2812 | ||
2813 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2814 | } else | |
2815 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2816 | name_index, | |
2817 | name, xs); | |
cf1d6c76 | 2818 | |
cf1d6c76 TY |
2819 | if (ret && ret != -ENODATA) { |
2820 | xs->xattr_bh = NULL; | |
2821 | goto cleanup; | |
2822 | } | |
2823 | xs->not_found = ret; | |
2824 | return 0; | |
cf1d6c76 TY |
2825 | cleanup: |
2826 | brelse(blk_bh); | |
2827 | ||
2828 | return ret; | |
2829 | } | |
2830 | ||
d3981544 | 2831 | static int ocfs2_create_xattr_block(struct inode *inode, |
5aea1f0e | 2832 | struct buffer_head *inode_bh, |
d3981544 JB |
2833 | struct ocfs2_xattr_set_ctxt *ctxt, |
2834 | int indexed, | |
2835 | struct buffer_head **ret_bh) | |
5aea1f0e TM |
2836 | { |
2837 | int ret; | |
2838 | u16 suballoc_bit_start; | |
2839 | u32 num_got; | |
2b6cb576 | 2840 | u64 suballoc_loc, first_blkno; |
5aea1f0e | 2841 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; |
5aea1f0e TM |
2842 | struct buffer_head *new_bh = NULL; |
2843 | struct ocfs2_xattr_block *xblk; | |
2844 | ||
d3981544 JB |
2845 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
2846 | inode_bh, OCFS2_JOURNAL_ACCESS_CREATE); | |
5aea1f0e TM |
2847 | if (ret < 0) { |
2848 | mlog_errno(ret); | |
2849 | goto end; | |
2850 | } | |
2851 | ||
1ed9b777 | 2852 | ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1, |
2b6cb576 JB |
2853 | &suballoc_loc, &suballoc_bit_start, |
2854 | &num_got, &first_blkno); | |
5aea1f0e TM |
2855 | if (ret < 0) { |
2856 | mlog_errno(ret); | |
2857 | goto end; | |
2858 | } | |
2859 | ||
2860 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2861 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); | |
2862 | ||
d3981544 | 2863 | ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode), |
5aea1f0e TM |
2864 | new_bh, |
2865 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2866 | if (ret < 0) { | |
2867 | mlog_errno(ret); | |
2868 | goto end; | |
2869 | } | |
2870 | ||
2871 | /* Initialize ocfs2_xattr_block */ | |
2872 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2873 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2874 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
d3981544 | 2875 | xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot); |
2b6cb576 | 2876 | xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc); |
5aea1f0e | 2877 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
1ed9b777 JB |
2878 | xblk->xb_fs_generation = |
2879 | cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation); | |
5aea1f0e | 2880 | xblk->xb_blkno = cpu_to_le64(first_blkno); |
a7fe7a3a TM |
2881 | if (indexed) { |
2882 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2883 | xr->xt_clusters = cpu_to_le32(1); | |
2884 | xr->xt_last_eb_blk = 0; | |
2885 | xr->xt_list.l_tree_depth = 0; | |
2886 | xr->xt_list.l_count = cpu_to_le16( | |
2887 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2888 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2889 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2890 | } | |
d3981544 | 2891 | ocfs2_journal_dirty(ctxt->handle, new_bh); |
a7fe7a3a | 2892 | |
d3981544 | 2893 | /* Add it to the inode */ |
5aea1f0e | 2894 | di->i_xattr_loc = cpu_to_le64(first_blkno); |
d3981544 JB |
2895 | |
2896 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2897 | OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
2898 | di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); | |
2899 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2900 | ||
2901 | ocfs2_journal_dirty(ctxt->handle, inode_bh); | |
5aea1f0e TM |
2902 | |
2903 | *ret_bh = new_bh; | |
2904 | new_bh = NULL; | |
2905 | ||
2906 | end: | |
2907 | brelse(new_bh); | |
2908 | return ret; | |
2909 | } | |
2910 | ||
cf1d6c76 TY |
2911 | /* |
2912 | * ocfs2_xattr_block_set() | |
2913 | * | |
2914 | * Set, replace or remove an extended attribute into external block. | |
2915 | * | |
2916 | */ | |
2917 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2918 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2919 | struct ocfs2_xattr_search *xs, |
2920 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2921 | { |
2922 | struct buffer_head *new_bh = NULL; | |
cf1d6c76 | 2923 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 | 2924 | int ret; |
d3981544 | 2925 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2926 | |
2927 | if (!xs->xattr_bh) { | |
d3981544 JB |
2928 | ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt, |
2929 | 0, &new_bh); | |
5aea1f0e | 2930 | if (ret) { |
cf1d6c76 | 2931 | mlog_errno(ret); |
85db90e7 | 2932 | goto end; |
cf1d6c76 TY |
2933 | } |
2934 | ||
cf1d6c76 | 2935 | xs->xattr_bh = new_bh; |
5aea1f0e | 2936 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2937 | xs->header = &xblk->xb_attrs.xb_header; |
2938 | xs->base = (void *)xs->header; | |
2939 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2940 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2941 | } else |
2942 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2943 | ||
2944 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
d3981544 JB |
2945 | ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh, |
2946 | xs->not_found ? NULL : xs->here); | |
01225596 | 2947 | |
d3981544 JB |
2948 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
2949 | if (!ret) | |
2950 | xs->here = loc.xl_entry; | |
5f5261ac | 2951 | else if ((ret != -ENOSPC) || ctxt->set_abort) |
01225596 | 2952 | goto end; |
d3981544 JB |
2953 | else { |
2954 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); | |
2955 | if (ret) | |
2956 | goto end; | |
2957 | } | |
cf1d6c76 TY |
2958 | } |
2959 | ||
d3981544 JB |
2960 | if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED) |
2961 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); | |
01225596 TM |
2962 | |
2963 | end: | |
cf1d6c76 TY |
2964 | return ret; |
2965 | } | |
2966 | ||
78f30c31 TM |
2967 | /* Check whether the new xattr can be inserted into the inode. */ |
2968 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2969 | struct ocfs2_xattr_info *xi, | |
2970 | struct ocfs2_xattr_search *xs) | |
2971 | { | |
78f30c31 TM |
2972 | struct ocfs2_xattr_entry *last; |
2973 | int free, i; | |
2974 | size_t min_offs = xs->end - xs->base; | |
2975 | ||
2976 | if (!xs->header) | |
2977 | return 0; | |
2978 | ||
2979 | last = xs->header->xh_entries; | |
2980 | ||
2981 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2982 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2983 | if (offs < min_offs) | |
2984 | min_offs = offs; | |
2985 | last += 1; | |
2986 | } | |
2987 | ||
4442f518 | 2988 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2989 | if (free < 0) |
2990 | return 0; | |
2991 | ||
2992 | BUG_ON(!xs->not_found); | |
2993 | ||
199799a3 | 2994 | if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi))) |
78f30c31 TM |
2995 | return 1; |
2996 | ||
2997 | return 0; | |
2998 | } | |
2999 | ||
3000 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
3001 | struct ocfs2_dinode *di, | |
3002 | struct ocfs2_xattr_info *xi, | |
3003 | struct ocfs2_xattr_search *xis, | |
3004 | struct ocfs2_xattr_search *xbs, | |
3005 | int *clusters_need, | |
85db90e7 TM |
3006 | int *meta_need, |
3007 | int *credits_need) | |
78f30c31 TM |
3008 | { |
3009 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 3010 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
3011 | struct buffer_head *bh = NULL; |
3012 | struct ocfs2_xattr_block *xb = NULL; | |
3013 | struct ocfs2_xattr_entry *xe = NULL; | |
3014 | struct ocfs2_xattr_value_root *xv = NULL; | |
3015 | char *base = NULL; | |
3016 | int name_offset, name_len = 0; | |
3017 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
6b240ff6 | 3018 | xi->xi_value_len); |
78f30c31 TM |
3019 | u64 value_size; |
3020 | ||
71d548a6 TM |
3021 | /* |
3022 | * Calculate the clusters we need to write. | |
3023 | * No matter whether we replace an old one or add a new one, | |
3024 | * we need this for writing. | |
3025 | */ | |
6b240ff6 | 3026 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
71d548a6 TM |
3027 | credits += new_clusters * |
3028 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3029 | ||
78f30c31 | 3030 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
3031 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3032 | ||
6b240ff6 | 3033 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 | 3034 | clusters_add += new_clusters; |
85db90e7 TM |
3035 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
3036 | &def_xv.xv.xr_list, | |
3037 | new_clusters); | |
3038 | } | |
78f30c31 TM |
3039 | |
3040 | goto meta_guess; | |
3041 | } | |
3042 | ||
3043 | if (!xis->not_found) { | |
3044 | xe = xis->here; | |
3045 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3046 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3047 | base = xis->base; | |
85db90e7 | 3048 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 3049 | } else { |
970e4936 | 3050 | int i, block_off = 0; |
78f30c31 TM |
3051 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
3052 | xe = xbs->here; | |
3053 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3054 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3055 | i = xbs->here - xbs->header->xh_entries; | |
3056 | old_in_xb = 1; | |
3057 | ||
3058 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 3059 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
3060 | bucket_xh(xbs->bucket), |
3061 | i, &block_off, | |
3062 | &name_offset); | |
3063 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
3064 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3065 | } else { | |
78f30c31 | 3066 | base = xbs->base; |
85db90e7 TM |
3067 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
3068 | } | |
3069 | } | |
3070 | ||
3071 | /* | |
3072 | * delete a xattr doesn't need metadata and cluster allocation. | |
3073 | * so just calculate the credits and return. | |
3074 | * | |
3075 | * The credits for removing the value tree will be extended | |
3076 | * by ocfs2_remove_extent itself. | |
3077 | */ | |
6b240ff6 | 3078 | if (!xi->xi_value) { |
85db90e7 | 3079 | if (!ocfs2_xattr_is_local(xe)) |
a90714c1 | 3080 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
3081 | |
3082 | goto out; | |
78f30c31 TM |
3083 | } |
3084 | ||
3085 | /* do cluster allocation guess first. */ | |
3086 | value_size = le64_to_cpu(xe->xe_value_size); | |
3087 | ||
3088 | if (old_in_xb) { | |
3089 | /* | |
3090 | * In xattr set, we always try to set the xe in inode first, | |
3091 | * so if it can be inserted into inode successfully, the old | |
3092 | * one will be removed from the xattr block, and this xattr | |
3093 | * will be inserted into inode as a new xattr in inode. | |
3094 | */ | |
3095 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
3096 | clusters_add += new_clusters; | |
a90714c1 | 3097 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
3098 | OCFS2_INODE_UPDATE_CREDITS; |
3099 | if (!ocfs2_xattr_is_local(xe)) | |
3100 | credits += ocfs2_calc_extend_credits( | |
3101 | inode->i_sb, | |
3102 | &def_xv.xv.xr_list, | |
3103 | new_clusters); | |
78f30c31 TM |
3104 | goto out; |
3105 | } | |
3106 | } | |
3107 | ||
6b240ff6 | 3108 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 TM |
3109 | /* the new values will be stored outside. */ |
3110 | u32 old_clusters = 0; | |
3111 | ||
3112 | if (!ocfs2_xattr_is_local(xe)) { | |
3113 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
3114 | value_size); | |
3115 | xv = (struct ocfs2_xattr_value_root *) | |
3116 | (base + name_offset + name_len); | |
97aff52a | 3117 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
3118 | } else |
3119 | xv = &def_xv.xv; | |
3120 | ||
85db90e7 | 3121 | if (old_clusters >= new_clusters) { |
a90714c1 | 3122 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 3123 | goto out; |
85db90e7 | 3124 | } else { |
78f30c31 TM |
3125 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
3126 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
3127 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
3128 | &xv->xr_list, | |
3129 | new_clusters - | |
3130 | old_clusters); | |
97aff52a TM |
3131 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
3132 | goto out; | |
78f30c31 TM |
3133 | } |
3134 | } else { | |
3135 | /* | |
3136 | * Now the new value will be stored inside. So if the new | |
3137 | * value is smaller than the size of value root or the old | |
3138 | * value, we don't need any allocation, otherwise we have | |
3139 | * to guess metadata allocation. | |
3140 | */ | |
6b240ff6 JB |
3141 | if ((ocfs2_xattr_is_local(xe) && |
3142 | (value_size >= xi->xi_value_len)) || | |
78f30c31 | 3143 | (!ocfs2_xattr_is_local(xe) && |
6b240ff6 | 3144 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
78f30c31 TM |
3145 | goto out; |
3146 | } | |
3147 | ||
3148 | meta_guess: | |
3149 | /* calculate metadata allocation. */ | |
3150 | if (di->i_xattr_loc) { | |
3151 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
3152 | ret = ocfs2_read_xattr_block(inode, |
3153 | le64_to_cpu(di->i_xattr_loc), | |
3154 | &bh); | |
78f30c31 TM |
3155 | if (ret) { |
3156 | mlog_errno(ret); | |
3157 | goto out; | |
3158 | } | |
3159 | ||
3160 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
3161 | } else | |
3162 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
3163 | ||
90cb546c TM |
3164 | /* |
3165 | * If there is already an xattr tree, good, we can calculate | |
3166 | * like other b-trees. Otherwise we may have the chance of | |
3167 | * create a tree, the credit calculation is borrowed from | |
3168 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
3169 | * new tree will be cluster based, so no meta is needed. | |
3170 | */ | |
78f30c31 TM |
3171 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
3172 | struct ocfs2_extent_list *el = | |
3173 | &xb->xb_attrs.xb_root.xt_list; | |
3174 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
3175 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
3176 | el, 1); | |
90cb546c TM |
3177 | } else |
3178 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
3179 | |
3180 | /* | |
3181 | * This cluster will be used either for new bucket or for | |
3182 | * new xattr block. | |
3183 | * If the cluster size is the same as the bucket size, one | |
3184 | * more is needed since we may need to extend the bucket | |
3185 | * also. | |
3186 | */ | |
3187 | clusters_add += 1; | |
85db90e7 | 3188 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 3189 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
3190 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
3191 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 3192 | clusters_add += 1; |
85db90e7 TM |
3193 | } |
3194 | } else { | |
78f30c31 | 3195 | meta_add += 1; |
85db90e7 TM |
3196 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
3197 | } | |
78f30c31 TM |
3198 | out: |
3199 | if (clusters_need) | |
3200 | *clusters_need = clusters_add; | |
3201 | if (meta_need) | |
3202 | *meta_need = meta_add; | |
85db90e7 TM |
3203 | if (credits_need) |
3204 | *credits_need = credits; | |
78f30c31 TM |
3205 | brelse(bh); |
3206 | return ret; | |
3207 | } | |
3208 | ||
3209 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
3210 | struct ocfs2_dinode *di, | |
3211 | struct ocfs2_xattr_info *xi, | |
3212 | struct ocfs2_xattr_search *xis, | |
3213 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 3214 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 3215 | int extra_meta, |
85db90e7 | 3216 | int *credits) |
78f30c31 TM |
3217 | { |
3218 | int clusters_add, meta_add, ret; | |
3219 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3220 | ||
3221 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
3222 | ||
3223 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
3224 | ||
3225 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 3226 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
3227 | if (ret) { |
3228 | mlog_errno(ret); | |
3229 | return ret; | |
3230 | } | |
3231 | ||
492a8a33 | 3232 | meta_add += extra_meta; |
85db90e7 | 3233 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
6b240ff6 | 3234 | "credits = %d\n", xi->xi_name, meta_add, clusters_add, *credits); |
78f30c31 TM |
3235 | |
3236 | if (meta_add) { | |
3237 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
3238 | &ctxt->meta_ac); | |
3239 | if (ret) { | |
3240 | mlog_errno(ret); | |
3241 | goto out; | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | if (clusters_add) { | |
3246 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
3247 | if (ret) | |
3248 | mlog_errno(ret); | |
3249 | } | |
3250 | out: | |
3251 | if (ret) { | |
3252 | if (ctxt->meta_ac) { | |
3253 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
3254 | ctxt->meta_ac = NULL; | |
3255 | } | |
3256 | ||
3257 | /* | |
3258 | * We cannot have an error and a non null ctxt->data_ac. | |
3259 | */ | |
3260 | } | |
3261 | ||
3262 | return ret; | |
3263 | } | |
3264 | ||
85db90e7 TM |
3265 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
3266 | struct ocfs2_dinode *di, | |
3267 | struct ocfs2_xattr_info *xi, | |
3268 | struct ocfs2_xattr_search *xis, | |
3269 | struct ocfs2_xattr_search *xbs, | |
3270 | struct ocfs2_xattr_set_ctxt *ctxt) | |
3271 | { | |
9f868f16 | 3272 | int ret = 0, credits, old_found; |
85db90e7 | 3273 | |
6b240ff6 | 3274 | if (!xi->xi_value) { |
85db90e7 TM |
3275 | /* Remove existing extended attribute */ |
3276 | if (!xis->not_found) | |
3277 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3278 | else if (!xbs->not_found) | |
3279 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3280 | } else { | |
3281 | /* We always try to set extended attribute into inode first*/ | |
3282 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3283 | if (!ret && !xbs->not_found) { | |
3284 | /* | |
3285 | * If succeed and that extended attribute existing in | |
3286 | * external block, then we will remove it. | |
3287 | */ | |
6b240ff6 JB |
3288 | xi->xi_value = NULL; |
3289 | xi->xi_value_len = 0; | |
85db90e7 | 3290 | |
9f868f16 | 3291 | old_found = xis->not_found; |
85db90e7 TM |
3292 | xis->not_found = -ENODATA; |
3293 | ret = ocfs2_calc_xattr_set_need(inode, | |
3294 | di, | |
3295 | xi, | |
3296 | xis, | |
3297 | xbs, | |
3298 | NULL, | |
3299 | NULL, | |
3300 | &credits); | |
9f868f16 | 3301 | xis->not_found = old_found; |
85db90e7 TM |
3302 | if (ret) { |
3303 | mlog_errno(ret); | |
3304 | goto out; | |
3305 | } | |
3306 | ||
c901fb00 | 3307 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3308 | if (ret) { |
3309 | mlog_errno(ret); | |
3310 | goto out; | |
3311 | } | |
3312 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
5f5261ac | 3313 | } else if ((ret == -ENOSPC) && !ctxt->set_abort) { |
85db90e7 TM |
3314 | if (di->i_xattr_loc && !xbs->xattr_bh) { |
3315 | ret = ocfs2_xattr_block_find(inode, | |
6b240ff6 JB |
3316 | xi->xi_name_index, |
3317 | xi->xi_name, xbs); | |
85db90e7 TM |
3318 | if (ret) |
3319 | goto out; | |
3320 | ||
9f868f16 | 3321 | old_found = xis->not_found; |
85db90e7 TM |
3322 | xis->not_found = -ENODATA; |
3323 | ret = ocfs2_calc_xattr_set_need(inode, | |
3324 | di, | |
3325 | xi, | |
3326 | xis, | |
3327 | xbs, | |
3328 | NULL, | |
3329 | NULL, | |
3330 | &credits); | |
9f868f16 | 3331 | xis->not_found = old_found; |
85db90e7 TM |
3332 | if (ret) { |
3333 | mlog_errno(ret); | |
3334 | goto out; | |
3335 | } | |
3336 | ||
c901fb00 | 3337 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3338 | if (ret) { |
3339 | mlog_errno(ret); | |
3340 | goto out; | |
3341 | } | |
3342 | } | |
3343 | /* | |
3344 | * If no space in inode, we will set extended attribute | |
3345 | * into external block. | |
3346 | */ | |
3347 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3348 | if (ret) | |
3349 | goto out; | |
3350 | if (!xis->not_found) { | |
3351 | /* | |
3352 | * If succeed and that extended attribute | |
3353 | * existing in inode, we will remove it. | |
3354 | */ | |
6b240ff6 JB |
3355 | xi->xi_value = NULL; |
3356 | xi->xi_value_len = 0; | |
85db90e7 TM |
3357 | xbs->not_found = -ENODATA; |
3358 | ret = ocfs2_calc_xattr_set_need(inode, | |
3359 | di, | |
3360 | xi, | |
3361 | xis, | |
3362 | xbs, | |
3363 | NULL, | |
3364 | NULL, | |
3365 | &credits); | |
3366 | if (ret) { | |
3367 | mlog_errno(ret); | |
3368 | goto out; | |
3369 | } | |
3370 | ||
c901fb00 | 3371 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3372 | if (ret) { |
3373 | mlog_errno(ret); | |
3374 | goto out; | |
3375 | } | |
3376 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
3377 | xis, ctxt); | |
3378 | } | |
3379 | } | |
3380 | } | |
3381 | ||
4b3f6209 TM |
3382 | if (!ret) { |
3383 | /* Update inode ctime. */ | |
0cf2f763 | 3384 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
3385 | xis->inode_bh, |
3386 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
3387 | if (ret) { |
3388 | mlog_errno(ret); | |
3389 | goto out; | |
3390 | } | |
3391 | ||
3392 | inode->i_ctime = CURRENT_TIME; | |
3393 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
3394 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
3395 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
3396 | } | |
85db90e7 TM |
3397 | out: |
3398 | return ret; | |
3399 | } | |
3400 | ||
6c3faba4 TY |
3401 | /* |
3402 | * This function only called duing creating inode | |
3403 | * for init security/acl xattrs of the new inode. | |
008aafaf | 3404 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
3405 | */ |
3406 | int ocfs2_xattr_set_handle(handle_t *handle, | |
3407 | struct inode *inode, | |
3408 | struct buffer_head *di_bh, | |
3409 | int name_index, | |
3410 | const char *name, | |
3411 | const void *value, | |
3412 | size_t value_len, | |
3413 | int flags, | |
3414 | struct ocfs2_alloc_context *meta_ac, | |
3415 | struct ocfs2_alloc_context *data_ac) | |
3416 | { | |
3417 | struct ocfs2_dinode *di; | |
3418 | int ret; | |
3419 | ||
3420 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3421 | .xi_name_index = name_index, |
3422 | .xi_name = name, | |
18853b95 | 3423 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3424 | .xi_value = value, |
3425 | .xi_value_len = value_len, | |
6c3faba4 TY |
3426 | }; |
3427 | ||
3428 | struct ocfs2_xattr_search xis = { | |
3429 | .not_found = -ENODATA, | |
3430 | }; | |
3431 | ||
3432 | struct ocfs2_xattr_search xbs = { | |
3433 | .not_found = -ENODATA, | |
3434 | }; | |
3435 | ||
3436 | struct ocfs2_xattr_set_ctxt ctxt = { | |
3437 | .handle = handle, | |
3438 | .meta_ac = meta_ac, | |
3439 | .data_ac = data_ac, | |
3440 | }; | |
3441 | ||
3442 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
3443 | return -EOPNOTSUPP; | |
3444 | ||
008aafaf TY |
3445 | /* |
3446 | * In extreme situation, may need xattr bucket when | |
3447 | * block size is too small. And we have already reserved | |
3448 | * the credits for bucket in mknod. | |
3449 | */ | |
3450 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
3451 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3452 | if (!xbs.bucket) { | |
3453 | mlog_errno(-ENOMEM); | |
3454 | return -ENOMEM; | |
3455 | } | |
3456 | } | |
3457 | ||
6c3faba4 TY |
3458 | xis.inode_bh = xbs.inode_bh = di_bh; |
3459 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3460 | ||
3461 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3462 | ||
3463 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3464 | if (ret) | |
3465 | goto cleanup; | |
3466 | if (xis.not_found) { | |
3467 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3468 | if (ret) | |
3469 | goto cleanup; | |
3470 | } | |
3471 | ||
3472 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3473 | ||
3474 | cleanup: | |
3475 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3476 | brelse(xbs.xattr_bh); | |
008aafaf | 3477 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
3478 | |
3479 | return ret; | |
3480 | } | |
3481 | ||
cf1d6c76 TY |
3482 | /* |
3483 | * ocfs2_xattr_set() | |
3484 | * | |
3485 | * Set, replace or remove an extended attribute for this inode. | |
3486 | * value is NULL to remove an existing extended attribute, else either | |
3487 | * create or replace an extended attribute. | |
3488 | */ | |
3489 | int ocfs2_xattr_set(struct inode *inode, | |
3490 | int name_index, | |
3491 | const char *name, | |
3492 | const void *value, | |
3493 | size_t value_len, | |
3494 | int flags) | |
3495 | { | |
3496 | struct buffer_head *di_bh = NULL; | |
3497 | struct ocfs2_dinode *di; | |
492a8a33 | 3498 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 3499 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 3500 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 3501 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
492a8a33 | 3502 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
3503 | |
3504 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3505 | .xi_name_index = name_index, |
3506 | .xi_name = name, | |
18853b95 | 3507 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3508 | .xi_value = value, |
3509 | .xi_value_len = value_len, | |
cf1d6c76 TY |
3510 | }; |
3511 | ||
3512 | struct ocfs2_xattr_search xis = { | |
3513 | .not_found = -ENODATA, | |
3514 | }; | |
3515 | ||
3516 | struct ocfs2_xattr_search xbs = { | |
3517 | .not_found = -ENODATA, | |
3518 | }; | |
3519 | ||
8154da3d TY |
3520 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
3521 | return -EOPNOTSUPP; | |
3522 | ||
ba937127 JB |
3523 | /* |
3524 | * Only xbs will be used on indexed trees. xis doesn't need a | |
3525 | * bucket. | |
3526 | */ | |
3527 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3528 | if (!xbs.bucket) { | |
3529 | mlog_errno(-ENOMEM); | |
3530 | return -ENOMEM; | |
3531 | } | |
3532 | ||
cf1d6c76 TY |
3533 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
3534 | if (ret < 0) { | |
3535 | mlog_errno(ret); | |
ba937127 | 3536 | goto cleanup_nolock; |
cf1d6c76 TY |
3537 | } |
3538 | xis.inode_bh = xbs.inode_bh = di_bh; | |
3539 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3540 | ||
3541 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3542 | /* | |
3543 | * Scan inode and external block to find the same name | |
3544 | * extended attribute and collect search infomation. | |
3545 | */ | |
3546 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3547 | if (ret) | |
3548 | goto cleanup; | |
3549 | if (xis.not_found) { | |
3550 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3551 | if (ret) | |
3552 | goto cleanup; | |
3553 | } | |
3554 | ||
3555 | if (xis.not_found && xbs.not_found) { | |
3556 | ret = -ENODATA; | |
3557 | if (flags & XATTR_REPLACE) | |
3558 | goto cleanup; | |
3559 | ret = 0; | |
3560 | if (!value) | |
3561 | goto cleanup; | |
3562 | } else { | |
3563 | ret = -EEXIST; | |
3564 | if (flags & XATTR_CREATE) | |
3565 | goto cleanup; | |
3566 | } | |
3567 | ||
492a8a33 TM |
3568 | /* Check whether the value is refcounted and do some prepartion. */ |
3569 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && | |
3570 | (!xis.not_found || !xbs.not_found)) { | |
3571 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
3572 | &xis, &xbs, &ref_tree, | |
3573 | &ref_meta, &ref_credits); | |
3574 | if (ret) { | |
3575 | mlog_errno(ret); | |
3576 | goto cleanup; | |
3577 | } | |
3578 | } | |
85db90e7 TM |
3579 | |
3580 | mutex_lock(&tl_inode->i_mutex); | |
3581 | ||
3582 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
3583 | ret = __ocfs2_flush_truncate_log(osb); | |
3584 | if (ret < 0) { | |
3585 | mutex_unlock(&tl_inode->i_mutex); | |
3586 | mlog_errno(ret); | |
3587 | goto cleanup; | |
3588 | } | |
3589 | } | |
3590 | mutex_unlock(&tl_inode->i_mutex); | |
3591 | ||
3592 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3593 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3594 | if (ret) { |
3595 | mlog_errno(ret); | |
3596 | goto cleanup; | |
3597 | } | |
3598 | ||
4b3f6209 TM |
3599 | /* we need to update inode's ctime field, so add credit for it. */ |
3600 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3601 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3602 | if (IS_ERR(ctxt.handle)) { |
3603 | ret = PTR_ERR(ctxt.handle); | |
3604 | mlog_errno(ret); | |
3605 | goto cleanup; | |
cf1d6c76 | 3606 | } |
85db90e7 TM |
3607 | |
3608 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3609 | ||
3610 | ocfs2_commit_trans(osb, ctxt.handle); | |
3611 | ||
78f30c31 TM |
3612 | if (ctxt.data_ac) |
3613 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3614 | if (ctxt.meta_ac) | |
3615 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3616 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3617 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3618 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3619 | |
cf1d6c76 | 3620 | cleanup: |
492a8a33 TM |
3621 | if (ref_tree) |
3622 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3623 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3624 | if (!value && !ret) { |
3625 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3626 | if (ret) | |
3627 | mlog_errno(ret); | |
3628 | } | |
cf1d6c76 | 3629 | ocfs2_inode_unlock(inode, 1); |
ba937127 | 3630 | cleanup_nolock: |
cf1d6c76 TY |
3631 | brelse(di_bh); |
3632 | brelse(xbs.xattr_bh); | |
ba937127 | 3633 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3634 | |
3635 | return ret; | |
3636 | } | |
3637 | ||
0c044f0b TM |
3638 | /* |
3639 | * Find the xattr extent rec which may contains name_hash. | |
3640 | * e_cpos will be the first name hash of the xattr rec. | |
3641 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3642 | */ | |
3643 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3644 | u32 name_hash, | |
3645 | u64 *p_blkno, | |
3646 | u32 *e_cpos, | |
3647 | u32 *num_clusters, | |
3648 | struct ocfs2_extent_list *el) | |
3649 | { | |
3650 | int ret = 0, i; | |
3651 | struct buffer_head *eb_bh = NULL; | |
3652 | struct ocfs2_extent_block *eb; | |
3653 | struct ocfs2_extent_rec *rec = NULL; | |
3654 | u64 e_blkno = 0; | |
3655 | ||
3656 | if (el->l_tree_depth) { | |
facdb77f JB |
3657 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3658 | &eb_bh); | |
0c044f0b TM |
3659 | if (ret) { |
3660 | mlog_errno(ret); | |
3661 | goto out; | |
3662 | } | |
3663 | ||
3664 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3665 | el = &eb->h_list; | |
3666 | ||
3667 | if (el->l_tree_depth) { | |
3668 | ocfs2_error(inode->i_sb, | |
3669 | "Inode %lu has non zero tree depth in " | |
3670 | "xattr tree block %llu\n", inode->i_ino, | |
3671 | (unsigned long long)eb_bh->b_blocknr); | |
3672 | ret = -EROFS; | |
3673 | goto out; | |
3674 | } | |
3675 | } | |
3676 | ||
3677 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3678 | rec = &el->l_recs[i]; | |
3679 | ||
3680 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3681 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3682 | break; | |
3683 | } | |
3684 | } | |
3685 | ||
3686 | if (!e_blkno) { | |
3687 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
3688 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
3689 | le32_to_cpu(rec->e_cpos), | |
3690 | ocfs2_rec_clusters(el, rec)); | |
3691 | ret = -EROFS; | |
3692 | goto out; | |
3693 | } | |
3694 | ||
3695 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3696 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3697 | if (e_cpos) | |
3698 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3699 | out: | |
3700 | brelse(eb_bh); | |
3701 | return ret; | |
3702 | } | |
3703 | ||
3704 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3705 | struct ocfs2_xattr_bucket *bucket, | |
3706 | void *para); | |
3707 | ||
589dc260 | 3708 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3709 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3710 | int name_index, |
3711 | const char *name, | |
3712 | u32 name_hash, | |
3713 | u16 *xe_index, | |
3714 | int *found) | |
3715 | { | |
3716 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3717 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3718 | size_t name_len = strlen(name); |
3719 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3720 | char *xe_name; |
3721 | ||
3722 | /* | |
3723 | * We don't use binary search in the bucket because there | |
3724 | * may be multiple entries with the same name hash. | |
3725 | */ | |
3726 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3727 | xe = &xh->xh_entries[i]; | |
3728 | ||
3729 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3730 | continue; | |
3731 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3732 | break; | |
3733 | ||
3734 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3735 | if (!cmp) | |
3736 | cmp = name_len - xe->xe_name_len; | |
3737 | if (cmp) | |
3738 | continue; | |
3739 | ||
fd68a894 | 3740 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3741 | xh, |
3742 | i, | |
3743 | &block_off, | |
3744 | &new_offset); | |
3745 | if (ret) { | |
3746 | mlog_errno(ret); | |
3747 | break; | |
3748 | } | |
3749 | ||
970e4936 | 3750 | |
e2356a3f JB |
3751 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3752 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3753 | *xe_index = i; |
3754 | *found = 1; | |
3755 | ret = 0; | |
3756 | break; | |
3757 | } | |
3758 | } | |
3759 | ||
3760 | return ret; | |
3761 | } | |
3762 | ||
3763 | /* | |
3764 | * Find the specified xattr entry in a series of buckets. | |
3765 | * This series start from p_blkno and last for num_clusters. | |
3766 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3767 | * the num of the valid buckets. | |
3768 | * | |
3769 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3770 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3771 | */ | |
3772 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3773 | int name_index, | |
3774 | const char *name, | |
3775 | u32 name_hash, | |
3776 | u64 p_blkno, | |
3777 | u32 first_hash, | |
3778 | u32 num_clusters, | |
3779 | struct ocfs2_xattr_search *xs) | |
3780 | { | |
3781 | int ret, found = 0; | |
589dc260 TM |
3782 | struct ocfs2_xattr_header *xh = NULL; |
3783 | struct ocfs2_xattr_entry *xe = NULL; | |
3784 | u16 index = 0; | |
3785 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3786 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3787 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3788 | u32 last_hash; |
e2356a3f | 3789 | u64 blkno, lower_blkno = 0; |
589dc260 | 3790 | |
e2356a3f JB |
3791 | search = ocfs2_xattr_bucket_new(inode); |
3792 | if (!search) { | |
3793 | ret = -ENOMEM; | |
3794 | mlog_errno(ret); | |
3795 | goto out; | |
3796 | } | |
3797 | ||
3798 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3799 | if (ret) { |
3800 | mlog_errno(ret); | |
3801 | goto out; | |
3802 | } | |
3803 | ||
e2356a3f | 3804 | xh = bucket_xh(search); |
589dc260 | 3805 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3806 | while (low_bucket <= high_bucket) { |
e2356a3f | 3807 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3808 | |
e2356a3f | 3809 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3810 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3811 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3812 | if (ret) { |
3813 | mlog_errno(ret); | |
3814 | goto out; | |
3815 | } | |
3816 | ||
e2356a3f | 3817 | xh = bucket_xh(search); |
589dc260 TM |
3818 | xe = &xh->xh_entries[0]; |
3819 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3820 | high_bucket = bucket - 1; | |
3821 | continue; | |
3822 | } | |
3823 | ||
3824 | /* | |
3825 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3826 | * bucket is larger than the search one. for an empty |
3827 | * bucket, the last one is also the first one. | |
589dc260 | 3828 | */ |
5a095611 TM |
3829 | if (xh->xh_count) |
3830 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3831 | ||
589dc260 TM |
3832 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3833 | ||
e2356a3f JB |
3834 | /* record lower_blkno which may be the insert place. */ |
3835 | lower_blkno = blkno; | |
589dc260 TM |
3836 | |
3837 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3838 | low_bucket = bucket + 1; | |
3839 | continue; | |
3840 | } | |
3841 | ||
3842 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3843 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3844 | name_index, name, name_hash, |
3845 | &index, &found); | |
3846 | if (ret) { | |
3847 | mlog_errno(ret); | |
3848 | goto out; | |
3849 | } | |
3850 | break; | |
3851 | } | |
3852 | ||
3853 | /* | |
3854 | * Record the bucket we have found. | |
3855 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3856 | * always set it to the previous bucket. | |
3857 | */ | |
e2356a3f JB |
3858 | if (!lower_blkno) |
3859 | lower_blkno = p_blkno; | |
3860 | ||
3861 | /* This should be in cache - we just read it during the search */ | |
3862 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3863 | if (ret) { | |
3864 | mlog_errno(ret); | |
3865 | goto out; | |
589dc260 | 3866 | } |
589dc260 | 3867 | |
ba937127 JB |
3868 | xs->header = bucket_xh(xs->bucket); |
3869 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3870 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3871 | ||
3872 | if (found) { | |
589dc260 TM |
3873 | xs->here = &xs->header->xh_entries[index]; |
3874 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3875 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3876 | } else |
3877 | ret = -ENODATA; | |
3878 | ||
3879 | out: | |
e2356a3f | 3880 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3881 | return ret; |
3882 | } | |
3883 | ||
3884 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3885 | struct buffer_head *root_bh, | |
3886 | int name_index, | |
3887 | const char *name, | |
3888 | struct ocfs2_xattr_search *xs) | |
3889 | { | |
3890 | int ret; | |
3891 | struct ocfs2_xattr_block *xb = | |
3892 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3893 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3894 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3895 | u64 p_blkno = 0; | |
3896 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3897 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3898 | |
3899 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3900 | return -ENODATA; | |
3901 | ||
3902 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3903 | name, name_hash, name_index); | |
3904 | ||
3905 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3906 | &num_clusters, el); | |
3907 | if (ret) { | |
3908 | mlog_errno(ret); | |
3909 | goto out; | |
3910 | } | |
3911 | ||
3912 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3913 | ||
3914 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3915 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3916 | first_hash); | |
589dc260 TM |
3917 | |
3918 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3919 | p_blkno, first_hash, num_clusters, xs); | |
3920 | ||
3921 | out: | |
3922 | return ret; | |
3923 | } | |
3924 | ||
0c044f0b TM |
3925 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3926 | u64 blkno, | |
3927 | u32 clusters, | |
3928 | xattr_bucket_func *func, | |
3929 | void *para) | |
3930 | { | |
6dde41d9 | 3931 | int i, ret = 0; |
0c044f0b TM |
3932 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3933 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3934 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3935 | |
ba937127 JB |
3936 | bucket = ocfs2_xattr_bucket_new(inode); |
3937 | if (!bucket) { | |
3938 | mlog_errno(-ENOMEM); | |
3939 | return -ENOMEM; | |
3940 | } | |
0c044f0b TM |
3941 | |
3942 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3943 | clusters, (unsigned long long)blkno); |
0c044f0b | 3944 | |
ba937127 JB |
3945 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3946 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3947 | if (ret) { |
3948 | mlog_errno(ret); | |
ba937127 | 3949 | break; |
0c044f0b TM |
3950 | } |
3951 | ||
0c044f0b TM |
3952 | /* |
3953 | * The real bucket num in this series of blocks is stored | |
3954 | * in the 1st bucket. | |
3955 | */ | |
3956 | if (i == 0) | |
ba937127 | 3957 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3958 | |
de29c085 MF |
3959 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3960 | (unsigned long long)blkno, | |
ba937127 | 3961 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3962 | if (func) { |
ba937127 | 3963 | ret = func(inode, bucket, para); |
a46fa684 | 3964 | if (ret && ret != -ERANGE) |
0c044f0b | 3965 | mlog_errno(ret); |
ba937127 | 3966 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3967 | } |
3968 | ||
ba937127 JB |
3969 | ocfs2_xattr_bucket_relse(bucket); |
3970 | if (ret) | |
3971 | break; | |
0c044f0b TM |
3972 | } |
3973 | ||
ba937127 | 3974 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3975 | return ret; |
3976 | } | |
3977 | ||
3978 | struct ocfs2_xattr_tree_list { | |
3979 | char *buffer; | |
3980 | size_t buffer_size; | |
936b8834 | 3981 | size_t result; |
0c044f0b TM |
3982 | }; |
3983 | ||
fd68a894 | 3984 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
3985 | struct ocfs2_xattr_header *xh, |
3986 | int index, | |
3987 | int *block_off, | |
3988 | int *new_offset) | |
3989 | { | |
3990 | u16 name_offset; | |
3991 | ||
3992 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3993 | return -EINVAL; | |
3994 | ||
3995 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3996 | ||
fd68a894 TM |
3997 | *block_off = name_offset >> sb->s_blocksize_bits; |
3998 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
3999 | |
4000 | return 0; | |
4001 | } | |
4002 | ||
4003 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
4004 | struct ocfs2_xattr_bucket *bucket, | |
4005 | void *para) | |
4006 | { | |
936b8834 | 4007 | int ret = 0, type; |
0c044f0b | 4008 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 4009 | int i, block_off, new_offset; |
936b8834 | 4010 | const char *prefix, *name; |
0c044f0b | 4011 | |
3e632946 JB |
4012 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
4013 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
4014 | type = ocfs2_xattr_get_type(entry); |
4015 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 4016 | |
936b8834 | 4017 | if (prefix) { |
fd68a894 | 4018 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 4019 | bucket_xh(bucket), |
0c044f0b TM |
4020 | i, |
4021 | &block_off, | |
4022 | &new_offset); | |
4023 | if (ret) | |
4024 | break; | |
936b8834 | 4025 | |
51def39f | 4026 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
4027 | new_offset; |
4028 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
4029 | xl->buffer_size, | |
4030 | &xl->result, | |
4031 | prefix, name, | |
4032 | entry->xe_name_len); | |
4033 | if (ret) | |
4034 | break; | |
0c044f0b TM |
4035 | } |
4036 | } | |
4037 | ||
4038 | return ret; | |
4039 | } | |
4040 | ||
47bca495 TM |
4041 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
4042 | struct buffer_head *blk_bh, | |
4043 | xattr_tree_rec_func *rec_func, | |
4044 | void *para) | |
0c044f0b | 4045 | { |
47bca495 TM |
4046 | struct ocfs2_xattr_block *xb = |
4047 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
4048 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
4049 | int ret = 0; |
4050 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
4051 | u64 p_blkno = 0; | |
0c044f0b | 4052 | |
47bca495 | 4053 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
4054 | return 0; |
4055 | ||
4056 | while (name_hash > 0) { | |
4057 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4058 | &e_cpos, &num_clusters, el); | |
4059 | if (ret) { | |
4060 | mlog_errno(ret); | |
47bca495 | 4061 | break; |
0c044f0b TM |
4062 | } |
4063 | ||
47bca495 TM |
4064 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
4065 | num_clusters, para); | |
0c044f0b | 4066 | if (ret) { |
a46fa684 TM |
4067 | if (ret != -ERANGE) |
4068 | mlog_errno(ret); | |
47bca495 | 4069 | break; |
0c044f0b TM |
4070 | } |
4071 | ||
4072 | if (e_cpos == 0) | |
4073 | break; | |
4074 | ||
4075 | name_hash = e_cpos - 1; | |
4076 | } | |
4077 | ||
47bca495 TM |
4078 | return ret; |
4079 | ||
4080 | } | |
4081 | ||
4082 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
4083 | struct buffer_head *root_bh, | |
4084 | u64 blkno, u32 cpos, u32 len, void *para) | |
4085 | { | |
4086 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
4087 | ocfs2_list_xattr_bucket, para); | |
4088 | } | |
4089 | ||
4090 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
4091 | struct buffer_head *blk_bh, | |
4092 | char *buffer, | |
4093 | size_t buffer_size) | |
4094 | { | |
4095 | int ret; | |
4096 | struct ocfs2_xattr_tree_list xl = { | |
4097 | .buffer = buffer, | |
4098 | .buffer_size = buffer_size, | |
4099 | .result = 0, | |
4100 | }; | |
4101 | ||
4102 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
4103 | ocfs2_list_xattr_tree_rec, &xl); | |
4104 | if (ret) { | |
4105 | mlog_errno(ret); | |
4106 | goto out; | |
4107 | } | |
4108 | ||
936b8834 | 4109 | ret = xl.result; |
0c044f0b TM |
4110 | out: |
4111 | return ret; | |
4112 | } | |
01225596 TM |
4113 | |
4114 | static int cmp_xe(const void *a, const void *b) | |
4115 | { | |
4116 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4117 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
4118 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
4119 | ||
4120 | if (l_hash > r_hash) | |
4121 | return 1; | |
4122 | if (l_hash < r_hash) | |
4123 | return -1; | |
4124 | return 0; | |
4125 | } | |
4126 | ||
4127 | static void swap_xe(void *a, void *b, int size) | |
4128 | { | |
4129 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
4130 | ||
4131 | tmp = *l; | |
4132 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
4133 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
4134 | } | |
4135 | ||
4136 | /* | |
4137 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
4138 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
4139 | * The header goes at the start of the bucket, and the names+values are |
4140 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
4141 | * Note: we need to sort the entries since they are not saved in order |
4142 | * in the ocfs2_xattr_block. | |
4143 | */ | |
4144 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
4145 | struct buffer_head *xb_bh, | |
178eeac3 | 4146 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
4147 | { |
4148 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 4149 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
4150 | u16 offset, size, off_change; |
4151 | struct ocfs2_xattr_entry *xe; | |
4152 | struct ocfs2_xattr_block *xb = | |
4153 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4154 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 4155 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4156 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
4157 | char *src = xb_bh->b_data; |
4158 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
4159 | |
4160 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
4161 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
4162 | (unsigned long long)bucket_blkno(bucket)); |
4163 | ||
4164 | for (i = 0; i < blks; i++) | |
4165 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 4166 | |
01225596 TM |
4167 | /* |
4168 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
4169 | * there is a offset change corresponding to the change of | |
4170 | * ocfs2_xattr_header's position. | |
4171 | */ | |
4172 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4173 | xe = &xb_xh->xh_entries[count - 1]; | |
4174 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
4175 | size = blocksize - offset; | |
4176 | ||
4177 | /* copy all the names and values. */ | |
01225596 TM |
4178 | memcpy(target + offset, src + offset, size); |
4179 | ||
4180 | /* Init new header now. */ | |
4181 | xh->xh_count = xb_xh->xh_count; | |
4182 | xh->xh_num_buckets = cpu_to_le16(1); | |
4183 | xh->xh_name_value_len = cpu_to_le16(size); | |
4184 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
4185 | ||
4186 | /* copy all the entries. */ | |
178eeac3 | 4187 | target = bucket_block(bucket, 0); |
01225596 TM |
4188 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
4189 | size = count * sizeof(struct ocfs2_xattr_entry); | |
4190 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
4191 | ||
4192 | /* Change the xe offset for all the xe because of the move. */ | |
4193 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
4194 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4195 | for (i = 0; i < count; i++) | |
4196 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
4197 | ||
4198 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
4199 | offset, size, off_change); | |
4200 | ||
4201 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
4202 | cmp_xe, swap_xe); | |
4203 | } | |
4204 | ||
4205 | /* | |
4206 | * After we move xattr from block to index btree, we have to | |
4207 | * update ocfs2_xattr_search to the new xe and base. | |
4208 | * | |
4209 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
4210 | * While if the entry is in index b-tree, "bucket" indicates the | |
4211 | * real place of the xattr. | |
4212 | */ | |
178eeac3 JB |
4213 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
4214 | struct ocfs2_xattr_search *xs, | |
4215 | struct buffer_head *old_bh) | |
01225596 | 4216 | { |
01225596 TM |
4217 | char *buf = old_bh->b_data; |
4218 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
4219 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 4220 | int i; |
01225596 | 4221 | |
ba937127 | 4222 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 4223 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
4224 | xs->end = xs->base + inode->i_sb->s_blocksize; |
4225 | ||
178eeac3 JB |
4226 | if (xs->not_found) |
4227 | return; | |
01225596 | 4228 | |
178eeac3 JB |
4229 | i = xs->here - old_xh->xh_entries; |
4230 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
4231 | } |
4232 | ||
4233 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
4234 | struct ocfs2_xattr_search *xs, |
4235 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4236 | { |
85db90e7 | 4237 | int ret; |
01225596 TM |
4238 | u32 bit_off, len; |
4239 | u64 blkno; | |
85db90e7 | 4240 | handle_t *handle = ctxt->handle; |
01225596 | 4241 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
01225596 TM |
4242 | struct buffer_head *xb_bh = xs->xattr_bh; |
4243 | struct ocfs2_xattr_block *xb = | |
4244 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4245 | struct ocfs2_xattr_tree_root *xr; | |
4246 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
4247 | |
4248 | mlog(0, "create xattr index block for %llu\n", | |
4249 | (unsigned long long)xb_bh->b_blocknr); | |
4250 | ||
4251 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 4252 | BUG_ON(!xs->bucket); |
01225596 | 4253 | |
01225596 TM |
4254 | /* |
4255 | * XXX: | |
4256 | * We can use this lock for now, and maybe move to a dedicated mutex | |
4257 | * if performance becomes a problem later. | |
4258 | */ | |
4259 | down_write(&oi->ip_alloc_sem); | |
4260 | ||
0cf2f763 | 4261 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 4262 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4263 | if (ret) { |
4264 | mlog_errno(ret); | |
85db90e7 | 4265 | goto out; |
01225596 TM |
4266 | } |
4267 | ||
1ed9b777 | 4268 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, |
78f30c31 | 4269 | 1, 1, &bit_off, &len); |
01225596 TM |
4270 | if (ret) { |
4271 | mlog_errno(ret); | |
85db90e7 | 4272 | goto out; |
01225596 TM |
4273 | } |
4274 | ||
4275 | /* | |
4276 | * The bucket may spread in many blocks, and | |
4277 | * we will only touch the 1st block and the last block | |
4278 | * in the whole bucket(one for entry and one for data). | |
4279 | */ | |
4280 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
4281 | ||
de29c085 MF |
4282 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
4283 | (unsigned long long)blkno); | |
01225596 | 4284 | |
178eeac3 JB |
4285 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
4286 | if (ret) { | |
01225596 | 4287 | mlog_errno(ret); |
85db90e7 | 4288 | goto out; |
01225596 TM |
4289 | } |
4290 | ||
178eeac3 JB |
4291 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
4292 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
4293 | if (ret) { |
4294 | mlog_errno(ret); | |
85db90e7 | 4295 | goto out; |
01225596 TM |
4296 | } |
4297 | ||
178eeac3 JB |
4298 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
4299 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 4300 | |
178eeac3 | 4301 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
4302 | |
4303 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
4304 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
4305 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
4306 | ||
4307 | xr = &xb->xb_attrs.xb_root; | |
4308 | xr->xt_clusters = cpu_to_le32(1); | |
4309 | xr->xt_last_eb_blk = 0; | |
4310 | xr->xt_list.l_tree_depth = 0; | |
4311 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
4312 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
4313 | ||
4314 | xr->xt_list.l_recs[0].e_cpos = 0; | |
4315 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
4316 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
4317 | ||
4318 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
4319 | ||
85db90e7 | 4320 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 4321 | |
85db90e7 | 4322 | out: |
01225596 TM |
4323 | up_write(&oi->ip_alloc_sem); |
4324 | ||
01225596 TM |
4325 | return ret; |
4326 | } | |
4327 | ||
4328 | static int cmp_xe_offset(const void *a, const void *b) | |
4329 | { | |
4330 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4331 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
4332 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
4333 | ||
4334 | if (l_name_offset < r_name_offset) | |
4335 | return 1; | |
4336 | if (l_name_offset > r_name_offset) | |
4337 | return -1; | |
4338 | return 0; | |
4339 | } | |
4340 | ||
4341 | /* | |
4342 | * defrag a xattr bucket if we find that the bucket has some | |
4343 | * holes beteen name/value pairs. | |
4344 | * We will move all the name/value pairs to the end of the bucket | |
4345 | * so that we can spare some space for insertion. | |
4346 | */ | |
4347 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 4348 | handle_t *handle, |
01225596 TM |
4349 | struct ocfs2_xattr_bucket *bucket) |
4350 | { | |
4351 | int ret, i; | |
199799a3 | 4352 | size_t end, offset, len; |
01225596 TM |
4353 | struct ocfs2_xattr_header *xh; |
4354 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 4355 | u64 blkno = bucket_blkno(bucket); |
01225596 | 4356 | u16 xh_free_start; |
01225596 | 4357 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 4358 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
4359 | |
4360 | /* | |
4361 | * In order to make the operation more efficient and generic, | |
4362 | * we copy all the blocks into a contiguous memory and do the | |
4363 | * defragment there, so if anything is error, we will not touch | |
4364 | * the real block. | |
4365 | */ | |
4366 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
4367 | if (!bucket_buf) { | |
4368 | ret = -EIO; | |
4369 | goto out; | |
4370 | } | |
4371 | ||
4372 | buf = bucket_buf; | |
1c32a2fd TM |
4373 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4374 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 4375 | |
1c32a2fd | 4376 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
4377 | OCFS2_JOURNAL_ACCESS_WRITE); |
4378 | if (ret < 0) { | |
4379 | mlog_errno(ret); | |
85db90e7 | 4380 | goto out; |
01225596 TM |
4381 | } |
4382 | ||
4383 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
4384 | entries = (char *)xh->xh_entries; | |
4385 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4386 | ||
4387 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
4388 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
4389 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
4390 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
4391 | |
4392 | /* | |
4393 | * sort all the entries by their offset. | |
4394 | * the largest will be the first, so that we can | |
4395 | * move them to the end one by one. | |
4396 | */ | |
4397 | sort(entries, le16_to_cpu(xh->xh_count), | |
4398 | sizeof(struct ocfs2_xattr_entry), | |
4399 | cmp_xe_offset, swap_xe); | |
4400 | ||
4401 | /* Move all name/values to the end of the bucket. */ | |
4402 | xe = xh->xh_entries; | |
4403 | end = OCFS2_XATTR_BUCKET_SIZE; | |
4404 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
4405 | offset = le16_to_cpu(xe->xe_name_offset); | |
199799a3 | 4406 | len = namevalue_size_xe(xe); |
01225596 TM |
4407 | |
4408 | /* | |
4409 | * We must make sure that the name/value pair | |
4410 | * exist in the same block. So adjust end to | |
4411 | * the previous block end if needed. | |
4412 | */ | |
4413 | if (((end - len) / blocksize != | |
4414 | (end - 1) / blocksize)) | |
4415 | end = end - end % blocksize; | |
4416 | ||
4417 | if (end > offset + len) { | |
4418 | memmove(bucket_buf + end - len, | |
4419 | bucket_buf + offset, len); | |
4420 | xe->xe_name_offset = cpu_to_le16(end - len); | |
4421 | } | |
4422 | ||
4423 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
4424 | "bucket %llu\n", (unsigned long long)blkno); | |
4425 | ||
4426 | end -= len; | |
4427 | } | |
4428 | ||
4429 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
4430 | "bucket %llu\n", (unsigned long long)blkno); | |
4431 | ||
4432 | if (xh_free_start == end) | |
85db90e7 | 4433 | goto out; |
01225596 TM |
4434 | |
4435 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
4436 | xh->xh_free_start = cpu_to_le16(end); | |
4437 | ||
4438 | /* sort the entries by their name_hash. */ | |
4439 | sort(entries, le16_to_cpu(xh->xh_count), | |
4440 | sizeof(struct ocfs2_xattr_entry), | |
4441 | cmp_xe, swap_xe); | |
4442 | ||
4443 | buf = bucket_buf; | |
1c32a2fd TM |
4444 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4445 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
4446 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 4447 | |
01225596 | 4448 | out: |
01225596 TM |
4449 | kfree(bucket_buf); |
4450 | return ret; | |
4451 | } | |
4452 | ||
4453 | /* | |
b5c03e74 JB |
4454 | * prev_blkno points to the start of an existing extent. new_blkno |
4455 | * points to a newly allocated extent. Because we know each of our | |
4456 | * clusters contains more than bucket, we can easily split one cluster | |
4457 | * at a bucket boundary. So we take the last cluster of the existing | |
4458 | * extent and split it down the middle. We move the last half of the | |
4459 | * buckets in the last cluster of the existing extent over to the new | |
4460 | * extent. | |
01225596 | 4461 | * |
b5c03e74 JB |
4462 | * first_bh is the buffer at prev_blkno so we can update the existing |
4463 | * extent's bucket count. header_bh is the bucket were we were hoping | |
4464 | * to insert our xattr. If the bucket move places the target in the new | |
4465 | * extent, we'll update first_bh and header_bh after modifying the old | |
4466 | * extent. | |
4467 | * | |
4468 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
4469 | */ |
4470 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
4471 | handle_t *handle, | |
41cb8148 JB |
4472 | struct ocfs2_xattr_bucket *first, |
4473 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4474 | u64 new_blkno, |
01225596 TM |
4475 | u32 num_clusters, |
4476 | u32 *first_hash) | |
4477 | { | |
c58b6032 | 4478 | int ret; |
41cb8148 JB |
4479 | struct super_block *sb = inode->i_sb; |
4480 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
4481 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 4482 | int to_move = num_buckets / 2; |
c58b6032 | 4483 | u64 src_blkno; |
41cb8148 JB |
4484 | u64 last_cluster_blkno = bucket_blkno(first) + |
4485 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 4486 | |
41cb8148 JB |
4487 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
4488 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 4489 | |
01225596 | 4490 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 4491 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 4492 | |
41cb8148 | 4493 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
4494 | last_cluster_blkno, new_blkno, |
4495 | to_move, first_hash); | |
01225596 TM |
4496 | if (ret) { |
4497 | mlog_errno(ret); | |
4498 | goto out; | |
4499 | } | |
4500 | ||
c58b6032 JB |
4501 | /* This is the first bucket that got moved */ |
4502 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 4503 | |
b5c03e74 | 4504 | /* |
c58b6032 | 4505 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 4506 | * update first and target. |
b5c03e74 | 4507 | */ |
41cb8148 | 4508 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
4509 | /* Find the block for the new target bucket */ |
4510 | src_blkno = new_blkno + | |
41cb8148 JB |
4511 | (bucket_blkno(target) - src_blkno); |
4512 | ||
4513 | ocfs2_xattr_bucket_relse(first); | |
4514 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 4515 | |
b5c03e74 | 4516 | /* |
c58b6032 | 4517 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
4518 | * journal from ocfs2_cp_xattr_bucket(). |
4519 | */ | |
41cb8148 | 4520 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
4521 | if (ret) { |
4522 | mlog_errno(ret); | |
4523 | goto out; | |
4524 | } | |
41cb8148 JB |
4525 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
4526 | if (ret) | |
b5c03e74 | 4527 | mlog_errno(ret); |
01225596 | 4528 | |
01225596 TM |
4529 | } |
4530 | ||
01225596 | 4531 | out: |
01225596 TM |
4532 | return ret; |
4533 | } | |
4534 | ||
01225596 | 4535 | /* |
80bcaf34 TM |
4536 | * Find the suitable pos when we divide a bucket into 2. |
4537 | * We have to make sure the xattrs with the same hash value exist | |
4538 | * in the same bucket. | |
4539 | * | |
4540 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
4541 | * place where the hash value changes. Try to find the most even split. | |
4542 | * The most common case is that all entries have different hash values, | |
4543 | * and the first check we make will find a place to split. | |
4544 | */ | |
4545 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
4546 | { | |
4547 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
4548 | int count = le16_to_cpu(xh->xh_count); | |
4549 | int delta, middle = count / 2; | |
4550 | ||
4551 | /* | |
4552 | * We start at the middle. Each step gets farther away in both | |
4553 | * directions. We therefore hit the change in hash value | |
4554 | * nearest to the middle. Note that this loop does not execute for | |
4555 | * count < 2. | |
4556 | */ | |
4557 | for (delta = 0; delta < middle; delta++) { | |
4558 | /* Let's check delta earlier than middle */ | |
4559 | if (cmp_xe(&entries[middle - delta - 1], | |
4560 | &entries[middle - delta])) | |
4561 | return middle - delta; | |
4562 | ||
4563 | /* For even counts, don't walk off the end */ | |
4564 | if ((middle + delta + 1) == count) | |
4565 | continue; | |
4566 | ||
4567 | /* Now try delta past middle */ | |
4568 | if (cmp_xe(&entries[middle + delta], | |
4569 | &entries[middle + delta + 1])) | |
4570 | return middle + delta + 1; | |
4571 | } | |
4572 | ||
4573 | /* Every entry had the same hash */ | |
4574 | return count; | |
4575 | } | |
4576 | ||
4577 | /* | |
4578 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4579 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4580 | * |
4581 | * Normally half of the xattrs will be moved. But we have to make | |
4582 | * sure that the xattrs with the same hash value are stored in the | |
4583 | * same bucket. If all the xattrs in this bucket have the same hash | |
4584 | * value, the new bucket will be initialized as an empty one and the | |
4585 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4586 | */ |
80bcaf34 TM |
4587 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4588 | handle_t *handle, | |
4589 | u64 blk, | |
4590 | u64 new_blk, | |
4591 | u32 *first_hash, | |
4592 | int new_bucket_head) | |
01225596 TM |
4593 | { |
4594 | int ret, i; | |
199799a3 | 4595 | int count, start, len, name_value_len = 0, name_offset = 0; |
ba937127 | 4596 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4597 | struct ocfs2_xattr_header *xh; |
4598 | struct ocfs2_xattr_entry *xe; | |
4599 | int blocksize = inode->i_sb->s_blocksize; | |
4600 | ||
80bcaf34 | 4601 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 4602 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 4603 | |
ba937127 JB |
4604 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4605 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4606 | if (!s_bucket || !t_bucket) { | |
4607 | ret = -ENOMEM; | |
4608 | mlog_errno(ret); | |
4609 | goto out; | |
4610 | } | |
01225596 | 4611 | |
ba937127 | 4612 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4613 | if (ret) { |
4614 | mlog_errno(ret); | |
4615 | goto out; | |
4616 | } | |
4617 | ||
ba937127 | 4618 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4619 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4620 | if (ret) { |
4621 | mlog_errno(ret); | |
4622 | goto out; | |
4623 | } | |
4624 | ||
784b816a JB |
4625 | /* |
4626 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4627 | * there's no need to read it. | |
4628 | */ | |
ba937127 | 4629 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
4630 | if (ret) { |
4631 | mlog_errno(ret); | |
4632 | goto out; | |
4633 | } | |
4634 | ||
2b656c1d JB |
4635 | /* |
4636 | * Hey, if we're overwriting t_bucket, what difference does | |
4637 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4638 | * same part of ocfs2_cp_xattr_bucket(). | |
4639 | */ | |
ba937127 | 4640 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4641 | new_bucket_head ? |
4642 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4643 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4644 | if (ret) { | |
4645 | mlog_errno(ret); | |
4646 | goto out; | |
01225596 TM |
4647 | } |
4648 | ||
ba937127 | 4649 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4650 | count = le16_to_cpu(xh->xh_count); |
4651 | start = ocfs2_xattr_find_divide_pos(xh); | |
4652 | ||
4653 | if (start == count) { | |
4654 | xe = &xh->xh_entries[start-1]; | |
4655 | ||
4656 | /* | |
4657 | * initialized a new empty bucket here. | |
4658 | * The hash value is set as one larger than | |
4659 | * that of the last entry in the previous bucket. | |
4660 | */ | |
ba937127 JB |
4661 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4662 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4663 | |
ba937127 | 4664 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4665 | xh->xh_free_start = cpu_to_le16(blocksize); |
4666 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4667 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4668 | ||
4669 | goto set_num_buckets; | |
4670 | } | |
4671 | ||
01225596 | 4672 | /* copy the whole bucket to the new first. */ |
ba937127 | 4673 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4674 | |
4675 | /* update the new bucket. */ | |
ba937127 | 4676 | xh = bucket_xh(t_bucket); |
01225596 TM |
4677 | |
4678 | /* | |
4679 | * Calculate the total name/value len and xh_free_start for | |
4680 | * the old bucket first. | |
4681 | */ | |
4682 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4683 | name_value_len = 0; | |
4684 | for (i = 0; i < start; i++) { | |
4685 | xe = &xh->xh_entries[i]; | |
199799a3 | 4686 | name_value_len += namevalue_size_xe(xe); |
01225596 TM |
4687 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) |
4688 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4689 | } | |
4690 | ||
4691 | /* | |
4692 | * Now begin the modification to the new bucket. | |
4693 | * | |
4694 | * In the new bucket, We just move the xattr entry to the beginning | |
4695 | * and don't touch the name/value. So there will be some holes in the | |
4696 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4697 | * called. | |
4698 | */ | |
4699 | xe = &xh->xh_entries[start]; | |
4700 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
4701 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
4702 | (int)((char *)xe - (char *)xh), |
4703 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4704 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4705 | xe = &xh->xh_entries[count - start]; | |
4706 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4707 | memset((char *)xe, 0, len); | |
4708 | ||
4709 | le16_add_cpu(&xh->xh_count, -start); | |
4710 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4711 | ||
4712 | /* Calculate xh_free_start for the new bucket. */ | |
4713 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4714 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4715 | xe = &xh->xh_entries[i]; | |
01225596 TM |
4716 | if (le16_to_cpu(xe->xe_name_offset) < |
4717 | le16_to_cpu(xh->xh_free_start)) | |
4718 | xh->xh_free_start = xe->xe_name_offset; | |
4719 | } | |
4720 | ||
80bcaf34 | 4721 | set_num_buckets: |
01225596 TM |
4722 | /* set xh->xh_num_buckets for the new xh. */ |
4723 | if (new_bucket_head) | |
4724 | xh->xh_num_buckets = cpu_to_le16(1); | |
4725 | else | |
4726 | xh->xh_num_buckets = 0; | |
4727 | ||
ba937127 | 4728 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4729 | |
4730 | /* store the first_hash of the new bucket. */ | |
4731 | if (first_hash) | |
4732 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4733 | ||
4734 | /* | |
80bcaf34 TM |
4735 | * Now only update the 1st block of the old bucket. If we |
4736 | * just added a new empty bucket, there is no need to modify | |
4737 | * it. | |
01225596 | 4738 | */ |
80bcaf34 TM |
4739 | if (start == count) |
4740 | goto out; | |
4741 | ||
ba937127 | 4742 | xh = bucket_xh(s_bucket); |
01225596 TM |
4743 | memset(&xh->xh_entries[start], 0, |
4744 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4745 | xh->xh_count = cpu_to_le16(start); | |
4746 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4747 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4748 | ||
ba937127 | 4749 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4750 | |
4751 | out: | |
ba937127 JB |
4752 | ocfs2_xattr_bucket_free(s_bucket); |
4753 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4754 | |
4755 | return ret; | |
4756 | } | |
4757 | ||
4758 | /* | |
4759 | * Copy xattr from one bucket to another bucket. | |
4760 | * | |
4761 | * The caller must make sure that the journal transaction | |
4762 | * has enough space for journaling. | |
4763 | */ | |
4764 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4765 | handle_t *handle, | |
4766 | u64 s_blkno, | |
4767 | u64 t_blkno, | |
4768 | int t_is_new) | |
4769 | { | |
4980c6da | 4770 | int ret; |
ba937127 | 4771 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4772 | |
4773 | BUG_ON(s_blkno == t_blkno); | |
4774 | ||
4775 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
4776 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
4777 | t_is_new); | |
01225596 | 4778 | |
ba937127 JB |
4779 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4780 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4781 | if (!s_bucket || !t_bucket) { | |
4782 | ret = -ENOMEM; | |
4783 | mlog_errno(ret); | |
4784 | goto out; | |
4785 | } | |
92de109a | 4786 | |
ba937127 | 4787 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4788 | if (ret) |
4789 | goto out; | |
4790 | ||
784b816a JB |
4791 | /* |
4792 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4793 | * there's no need to read it. | |
4794 | */ | |
ba937127 | 4795 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
4796 | if (ret) |
4797 | goto out; | |
4798 | ||
2b656c1d JB |
4799 | /* |
4800 | * Hey, if we're overwriting t_bucket, what difference does | |
4801 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4802 | * cluster to fill, we came here from |
4803 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4804 | * ACCESS_CREATE is required. But we also might have moved data | |
4805 | * out of t_bucket before extending back into it. | |
4806 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4807 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4808 | * and copied out the end of the old extent. Then it re-extends |
4809 | * the old extent back to create space for new xattrs. That's | |
4810 | * how we get here, and the bucket isn't really new. | |
4811 | */ | |
ba937127 | 4812 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4813 | t_is_new ? |
4814 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4815 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4816 | if (ret) | |
4817 | goto out; | |
01225596 | 4818 | |
ba937127 JB |
4819 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4820 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4821 | |
4822 | out: | |
ba937127 JB |
4823 | ocfs2_xattr_bucket_free(t_bucket); |
4824 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4825 | |
4826 | return ret; | |
4827 | } | |
4828 | ||
4829 | /* | |
874d65af JB |
4830 | * src_blk points to the start of an existing extent. last_blk points to |
4831 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4832 | * extent. We copy the buckets from the cluster at last_blk to the new |
4833 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4834 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4835 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4836 | * by the same amount. | |
01225596 | 4837 | */ |
54ecb6b6 JB |
4838 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4839 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4840 | unsigned int start_bucket, | |
4841 | u32 *first_hash) | |
01225596 TM |
4842 | { |
4843 | int i, ret, credits; | |
4844 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4845 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4846 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4847 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4848 | |
874d65af JB |
4849 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4850 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4851 | |
54ecb6b6 JB |
4852 | BUG_ON(start_bucket >= num_buckets); |
4853 | if (start_bucket) { | |
4854 | num_buckets -= start_bucket; | |
4855 | last_blk += (start_bucket * blks_per_bucket); | |
4856 | } | |
4857 | ||
15d60929 JB |
4858 | /* The first bucket of the original extent */ |
4859 | old_first = ocfs2_xattr_bucket_new(inode); | |
4860 | /* The first bucket of the new extent */ | |
4861 | new_first = ocfs2_xattr_bucket_new(inode); | |
4862 | if (!old_first || !new_first) { | |
4863 | ret = -ENOMEM; | |
4864 | mlog_errno(ret); | |
4865 | goto out; | |
4866 | } | |
4867 | ||
874d65af | 4868 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4869 | if (ret) { |
4870 | mlog_errno(ret); | |
4871 | goto out; | |
4872 | } | |
4873 | ||
01225596 | 4874 | /* |
54ecb6b6 JB |
4875 | * We need to update the first bucket of the old extent and all |
4876 | * the buckets going to the new extent. | |
01225596 | 4877 | */ |
c901fb00 | 4878 | credits = ((num_buckets + 1) * blks_per_bucket); |
01225596 TM |
4879 | ret = ocfs2_extend_trans(handle, credits); |
4880 | if (ret) { | |
4881 | mlog_errno(ret); | |
4882 | goto out; | |
4883 | } | |
4884 | ||
15d60929 JB |
4885 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4886 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4887 | if (ret) { |
4888 | mlog_errno(ret); | |
4889 | goto out; | |
4890 | } | |
4891 | ||
4892 | for (i = 0; i < num_buckets; i++) { | |
4893 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4894 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4895 | to_blk + (i * blks_per_bucket), |
4896 | 1); | |
01225596 TM |
4897 | if (ret) { |
4898 | mlog_errno(ret); | |
4899 | goto out; | |
4900 | } | |
01225596 TM |
4901 | } |
4902 | ||
15d60929 JB |
4903 | /* |
4904 | * Get the new bucket ready before we dirty anything | |
4905 | * (This actually shouldn't fail, because we already dirtied | |
4906 | * it once in ocfs2_cp_xattr_bucket()). | |
4907 | */ | |
4908 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4909 | if (ret) { | |
01225596 TM |
4910 | mlog_errno(ret); |
4911 | goto out; | |
4912 | } | |
15d60929 JB |
4913 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4914 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4915 | if (ret) { |
4916 | mlog_errno(ret); | |
4917 | goto out; | |
4918 | } | |
4919 | ||
15d60929 JB |
4920 | /* Now update the headers */ |
4921 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4922 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4923 | |
15d60929 JB |
4924 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4925 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4926 | |
4927 | if (first_hash) | |
15d60929 JB |
4928 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4929 | ||
01225596 | 4930 | out: |
15d60929 JB |
4931 | ocfs2_xattr_bucket_free(new_first); |
4932 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4933 | return ret; |
4934 | } | |
4935 | ||
4936 | /* | |
80bcaf34 | 4937 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4938 | * This function should only be called when bucket size == cluster size. |
4939 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4940 | */ | |
80bcaf34 TM |
4941 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4942 | handle_t *handle, | |
4943 | u64 prev_blk, | |
4944 | u64 new_blk, | |
4945 | u32 *first_hash) | |
01225596 TM |
4946 | { |
4947 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
c901fb00 | 4948 | int ret, credits = 2 * blk_per_bucket; |
01225596 TM |
4949 | |
4950 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4951 | ||
4952 | ret = ocfs2_extend_trans(handle, credits); | |
4953 | if (ret) { | |
4954 | mlog_errno(ret); | |
4955 | return ret; | |
4956 | } | |
4957 | ||
4958 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4959 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4960 | new_blk, first_hash, 1); | |
01225596 TM |
4961 | } |
4962 | ||
4963 | /* | |
4964 | * Move some xattrs from the old cluster to the new one since they are not | |
4965 | * contiguous in ocfs2 xattr tree. | |
4966 | * | |
4967 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4968 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4969 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4970 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4971 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4972 | * to extend the insert bucket. | |
4973 | * | |
4974 | * The problem is how much xattr should we move to the new one and when should | |
4975 | * we update first_bh and header_bh? | |
4976 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4977 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4978 | * update the first_bh and header_bh if the insert bucket has been moved | |
4979 | * to the new cluster. | |
4980 | * 2. If cluster_size == bucket_size: | |
4981 | * a) If the previous extent rec has more than one cluster and the insert | |
4982 | * place isn't in the last cluster, copy the entire last cluster to the | |
4983 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4984 | * since they will not be moved into the new cluster. | |
4985 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4986 | * the new one. And we set the extend flag to zero if the insert place is | |
4987 | * moved into the new allocated cluster since no extend is needed. | |
4988 | */ | |
4989 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4990 | handle_t *handle, | |
012ee910 JB |
4991 | struct ocfs2_xattr_bucket *first, |
4992 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4993 | u64 new_blk, |
01225596 TM |
4994 | u32 prev_clusters, |
4995 | u32 *v_start, | |
4996 | int *extend) | |
4997 | { | |
92cf3adf | 4998 | int ret; |
01225596 TM |
4999 | |
5000 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 5001 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 5002 | (unsigned long long)new_blk); |
01225596 | 5003 | |
41cb8148 | 5004 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
5005 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
5006 | handle, | |
41cb8148 | 5007 | first, target, |
01225596 | 5008 | new_blk, |
01225596 TM |
5009 | prev_clusters, |
5010 | v_start); | |
012ee910 | 5011 | if (ret) |
41cb8148 | 5012 | mlog_errno(ret); |
41cb8148 | 5013 | } else { |
92cf3adf JB |
5014 | /* The start of the last cluster in the first extent */ |
5015 | u64 last_blk = bucket_blkno(first) + | |
5016 | ((prev_clusters - 1) * | |
5017 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 5018 | |
012ee910 | 5019 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 5020 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 5021 | bucket_blkno(first), |
54ecb6b6 | 5022 | last_blk, new_blk, 0, |
01225596 | 5023 | v_start); |
012ee910 JB |
5024 | if (ret) |
5025 | mlog_errno(ret); | |
5026 | } else { | |
80bcaf34 TM |
5027 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
5028 | last_blk, new_blk, | |
5029 | v_start); | |
012ee910 JB |
5030 | if (ret) |
5031 | mlog_errno(ret); | |
01225596 | 5032 | |
92cf3adf | 5033 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
5034 | *extend = 0; |
5035 | } | |
5036 | } | |
5037 | ||
5038 | return ret; | |
5039 | } | |
5040 | ||
5041 | /* | |
5042 | * Add a new cluster for xattr storage. | |
5043 | * | |
5044 | * If the new cluster is contiguous with the previous one, it will be | |
5045 | * appended to the same extent record, and num_clusters will be updated. | |
5046 | * If not, we will insert a new extent for it and move some xattrs in | |
5047 | * the last cluster into the new allocated one. | |
5048 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
5049 | * lose the benefits of hashing because we'll have to search large leaves. | |
5050 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
5051 | * if it's bigger). | |
5052 | * | |
5053 | * first_bh is the first block of the previous extent rec and header_bh | |
5054 | * indicates the bucket we will insert the new xattrs. They will be updated | |
5055 | * when the header_bh is moved into the new cluster. | |
5056 | */ | |
5057 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
5058 | struct buffer_head *root_bh, | |
ed29c0ca JB |
5059 | struct ocfs2_xattr_bucket *first, |
5060 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
5061 | u32 *num_clusters, |
5062 | u32 prev_cpos, | |
78f30c31 TM |
5063 | int *extend, |
5064 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5065 | { |
85db90e7 | 5066 | int ret; |
01225596 TM |
5067 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
5068 | u32 prev_clusters = *num_clusters; | |
5069 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
5070 | u64 block; | |
85db90e7 | 5071 | handle_t *handle = ctxt->handle; |
01225596 | 5072 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 5073 | struct ocfs2_extent_tree et; |
01225596 TM |
5074 | |
5075 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
5076 | "previous xattr blkno = %llu\n", | |
5077 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 5078 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 5079 | |
5e404e9e | 5080 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 5081 | |
0cf2f763 | 5082 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5083 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5084 | if (ret < 0) { |
5085 | mlog_errno(ret); | |
5086 | goto leave; | |
5087 | } | |
5088 | ||
1ed9b777 | 5089 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1, |
01225596 TM |
5090 | clusters_to_add, &bit_off, &num_bits); |
5091 | if (ret < 0) { | |
5092 | if (ret != -ENOSPC) | |
5093 | mlog_errno(ret); | |
5094 | goto leave; | |
5095 | } | |
5096 | ||
5097 | BUG_ON(num_bits > clusters_to_add); | |
5098 | ||
5099 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
5100 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
5101 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
5102 | ||
ed29c0ca | 5103 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
5104 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
5105 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
5106 | /* | |
5107 | * If this cluster is contiguous with the old one and | |
5108 | * adding this new cluster, we don't surpass the limit of | |
5109 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
5110 | * initialized and used like other buckets in the previous | |
5111 | * cluster. | |
5112 | * So add it as a contiguous one. The caller will handle | |
5113 | * its init process. | |
5114 | */ | |
5115 | v_start = prev_cpos + prev_clusters; | |
5116 | *num_clusters = prev_clusters + num_bits; | |
5117 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
5118 | num_bits); | |
5119 | } else { | |
5120 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
5121 | handle, | |
012ee910 JB |
5122 | first, |
5123 | target, | |
01225596 | 5124 | block, |
01225596 TM |
5125 | prev_clusters, |
5126 | &v_start, | |
5127 | extend); | |
5128 | if (ret) { | |
5129 | mlog_errno(ret); | |
5130 | goto leave; | |
5131 | } | |
5132 | } | |
5133 | ||
5134 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 5135 | num_bits, (unsigned long long)block, v_start); |
cc79d8c1 | 5136 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 5137 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
5138 | if (ret < 0) { |
5139 | mlog_errno(ret); | |
5140 | goto leave; | |
5141 | } | |
5142 | ||
ec20cec7 | 5143 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5144 | |
5145 | leave: | |
01225596 TM |
5146 | return ret; |
5147 | } | |
5148 | ||
5149 | /* | |
92de109a JB |
5150 | * We are given an extent. 'first' is the bucket at the very front of |
5151 | * the extent. The extent has space for an additional bucket past | |
5152 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
5153 | * of the target bucket. We wish to shift every bucket past the target | |
5154 | * down one, filling in that additional space. When we get back to the | |
5155 | * target, we split the target between itself and the now-empty bucket | |
5156 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
5157 | */ |
5158 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 5159 | handle_t *handle, |
92de109a JB |
5160 | struct ocfs2_xattr_bucket *first, |
5161 | u64 target_blk, | |
01225596 TM |
5162 | u32 num_clusters) |
5163 | { | |
5164 | int ret, credits; | |
5165 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5166 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
5167 | u64 end_blk; |
5168 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
5169 | |
5170 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
5171 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
5172 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 5173 | |
92de109a JB |
5174 | /* The extent must have room for an additional bucket */ |
5175 | BUG_ON(new_bucket >= | |
5176 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 5177 | |
92de109a JB |
5178 | /* end_blk points to the last existing bucket */ |
5179 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
5180 | |
5181 | /* | |
92de109a JB |
5182 | * end_blk is the start of the last existing bucket. |
5183 | * Thus, (end_blk - target_blk) covers the target bucket and | |
5184 | * every bucket after it up to, but not including, the last | |
5185 | * existing bucket. Then we add the last existing bucket, the | |
5186 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 5187 | */ |
c901fb00 | 5188 | credits = (end_blk - target_blk) + (3 * blk_per_bucket); |
85db90e7 TM |
5189 | ret = ocfs2_extend_trans(handle, credits); |
5190 | if (ret) { | |
01225596 TM |
5191 | mlog_errno(ret); |
5192 | goto out; | |
5193 | } | |
5194 | ||
92de109a JB |
5195 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
5196 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
5197 | if (ret) { |
5198 | mlog_errno(ret); | |
85db90e7 | 5199 | goto out; |
01225596 TM |
5200 | } |
5201 | ||
92de109a | 5202 | while (end_blk != target_blk) { |
01225596 TM |
5203 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
5204 | end_blk + blk_per_bucket, 0); | |
5205 | if (ret) | |
85db90e7 | 5206 | goto out; |
01225596 TM |
5207 | end_blk -= blk_per_bucket; |
5208 | } | |
5209 | ||
92de109a JB |
5210 | /* Move half of the xattr in target_blkno to the next bucket. */ |
5211 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
5212 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 5213 | |
92de109a JB |
5214 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
5215 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 5216 | |
01225596 TM |
5217 | out: |
5218 | return ret; | |
5219 | } | |
5220 | ||
5221 | /* | |
91f2033f JB |
5222 | * Add new xattr bucket in an extent record and adjust the buckets |
5223 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
5224 | * bucket we want to insert into. | |
01225596 | 5225 | * |
91f2033f JB |
5226 | * In the easy case, we will move all the buckets after target down by |
5227 | * one. Half of target's xattrs will be moved to the next bucket. | |
5228 | * | |
5229 | * If current cluster is full, we'll allocate a new one. This may not | |
5230 | * be contiguous. The underlying calls will make sure that there is | |
5231 | * space for the insert, shifting buckets around if necessary. | |
5232 | * 'target' may be moved by those calls. | |
01225596 TM |
5233 | */ |
5234 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
5235 | struct buffer_head *xb_bh, | |
91f2033f | 5236 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 5237 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 5238 | { |
01225596 TM |
5239 | struct ocfs2_xattr_block *xb = |
5240 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5241 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
5242 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
5243 | u32 name_hash = |
5244 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 5245 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
5246 | int ret, num_buckets, extend = 1; |
5247 | u64 p_blkno; | |
5248 | u32 e_cpos, num_clusters; | |
92de109a | 5249 | /* The bucket at the front of the extent */ |
91f2033f | 5250 | struct ocfs2_xattr_bucket *first; |
01225596 | 5251 | |
91f2033f JB |
5252 | mlog(0, "Add new xattr bucket starting from %llu\n", |
5253 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 5254 | |
ed29c0ca | 5255 | /* The first bucket of the original extent */ |
92de109a | 5256 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 5257 | if (!first) { |
92de109a JB |
5258 | ret = -ENOMEM; |
5259 | mlog_errno(ret); | |
5260 | goto out; | |
5261 | } | |
5262 | ||
01225596 TM |
5263 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
5264 | &num_clusters, el); | |
5265 | if (ret) { | |
5266 | mlog_errno(ret); | |
5267 | goto out; | |
5268 | } | |
5269 | ||
ed29c0ca | 5270 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
5271 | if (ret) { |
5272 | mlog_errno(ret); | |
5273 | goto out; | |
5274 | } | |
5275 | ||
ed29c0ca JB |
5276 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
5277 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
5278 | /* | |
5279 | * This can move first+target if the target bucket moves | |
5280 | * to the new extent. | |
5281 | */ | |
01225596 TM |
5282 | ret = ocfs2_add_new_xattr_cluster(inode, |
5283 | xb_bh, | |
ed29c0ca JB |
5284 | first, |
5285 | target, | |
01225596 TM |
5286 | &num_clusters, |
5287 | e_cpos, | |
78f30c31 TM |
5288 | &extend, |
5289 | ctxt); | |
01225596 TM |
5290 | if (ret) { |
5291 | mlog_errno(ret); | |
5292 | goto out; | |
5293 | } | |
5294 | } | |
5295 | ||
92de109a | 5296 | if (extend) { |
01225596 | 5297 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 5298 | ctxt->handle, |
ed29c0ca JB |
5299 | first, |
5300 | bucket_blkno(target), | |
01225596 | 5301 | num_clusters); |
92de109a JB |
5302 | if (ret) |
5303 | mlog_errno(ret); | |
5304 | } | |
5305 | ||
01225596 | 5306 | out: |
92de109a | 5307 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 5308 | |
01225596 TM |
5309 | return ret; |
5310 | } | |
5311 | ||
5312 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
5313 | struct ocfs2_xattr_bucket *bucket, | |
5314 | int offs) | |
5315 | { | |
5316 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
5317 | ||
5318 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 5319 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
5320 | } |
5321 | ||
01225596 TM |
5322 | /* |
5323 | * Truncate the specified xe_off entry in xattr bucket. | |
5324 | * bucket is indicated by header_bh and len is the new length. | |
5325 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
5326 | * | |
5327 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
5328 | */ | |
5329 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 5330 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 5331 | int xe_off, |
78f30c31 TM |
5332 | int len, |
5333 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5334 | { |
5335 | int ret, offset; | |
5336 | u64 value_blk; | |
01225596 | 5337 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 5338 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 5339 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
5340 | struct ocfs2_xattr_value_buf vb = { |
5341 | .vb_access = ocfs2_journal_access, | |
5342 | }; | |
01225596 TM |
5343 | |
5344 | xe = &xh->xh_entries[xe_off]; | |
5345 | ||
5346 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
5347 | ||
5348 | offset = le16_to_cpu(xe->xe_name_offset) + | |
5349 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5350 | ||
5351 | value_blk = offset / blocksize; | |
5352 | ||
5353 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
5354 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 5355 | |
b3e5d379 JB |
5356 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
5357 | BUG_ON(!vb.vb_bh); | |
01225596 | 5358 | |
b3e5d379 JB |
5359 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
5360 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 5361 | |
548b0f22 JB |
5362 | /* |
5363 | * From here on out we have to dirty the bucket. The generic | |
5364 | * value calls only modify one of the bucket's bhs, but we need | |
5365 | * to send the bucket at once. So if they error, they *could* have | |
5366 | * modified something. We have to assume they did, and dirty | |
5367 | * the whole bucket. This leaves us in a consistent state. | |
5368 | */ | |
5369 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
5370 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 5371 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
5372 | if (ret) { |
5373 | mlog_errno(ret); | |
554e7f9e TM |
5374 | goto out; |
5375 | } | |
5376 | ||
5377 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5378 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5379 | if (ret) { | |
5380 | mlog_errno(ret); | |
5381 | goto out; | |
01225596 TM |
5382 | } |
5383 | ||
548b0f22 JB |
5384 | xe->xe_value_size = cpu_to_le64(len); |
5385 | ||
548b0f22 JB |
5386 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5387 | ||
01225596 | 5388 | out: |
01225596 TM |
5389 | return ret; |
5390 | } | |
5391 | ||
01225596 TM |
5392 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5393 | struct buffer_head *root_bh, | |
5394 | u64 blkno, | |
5395 | u32 cpos, | |
47bca495 TM |
5396 | u32 len, |
5397 | void *para) | |
01225596 TM |
5398 | { |
5399 | int ret; | |
5400 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5401 | struct inode *tl_inode = osb->osb_tl_inode; | |
5402 | handle_t *handle; | |
5403 | struct ocfs2_xattr_block *xb = | |
5404 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5405 | struct ocfs2_alloc_context *meta_ac = NULL; |
5406 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5407 | struct ocfs2_extent_tree et; |
5408 | ||
47bca495 | 5409 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5410 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5411 | if (ret) { |
5412 | mlog_errno(ret); | |
5413 | return ret; | |
5414 | } | |
5415 | ||
5e404e9e | 5416 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5417 | |
5418 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5419 | ||
5420 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
5421 | cpos, len, (unsigned long long)blkno); | |
5422 | ||
8cb471e8 JB |
5423 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5424 | len); | |
01225596 | 5425 | |
f99b9b7c | 5426 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5427 | if (ret) { |
5428 | mlog_errno(ret); | |
5429 | return ret; | |
5430 | } | |
5431 | ||
5432 | mutex_lock(&tl_inode->i_mutex); | |
5433 | ||
5434 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5435 | ret = __ocfs2_flush_truncate_log(osb); | |
5436 | if (ret < 0) { | |
5437 | mlog_errno(ret); | |
5438 | goto out; | |
5439 | } | |
5440 | } | |
5441 | ||
a90714c1 | 5442 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5443 | if (IS_ERR(handle)) { |
01225596 TM |
5444 | ret = -ENOMEM; |
5445 | mlog_errno(ret); | |
5446 | goto out; | |
5447 | } | |
5448 | ||
0cf2f763 | 5449 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5450 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5451 | if (ret) { |
5452 | mlog_errno(ret); | |
5453 | goto out_commit; | |
5454 | } | |
5455 | ||
dbdcf6a4 | 5456 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5457 | &dealloc); |
01225596 TM |
5458 | if (ret) { |
5459 | mlog_errno(ret); | |
5460 | goto out_commit; | |
5461 | } | |
5462 | ||
5463 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
ec20cec7 | 5464 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5465 | |
5466 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5467 | if (ret) | |
5468 | mlog_errno(ret); | |
5469 | ||
5470 | out_commit: | |
5471 | ocfs2_commit_trans(osb, handle); | |
5472 | out: | |
5473 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5474 | ||
5475 | mutex_unlock(&tl_inode->i_mutex); | |
5476 | ||
5477 | if (meta_ac) | |
5478 | ocfs2_free_alloc_context(meta_ac); | |
5479 | ||
5480 | ocfs2_run_deallocs(osb, &dealloc); | |
5481 | ||
5482 | return ret; | |
5483 | } | |
5484 | ||
80bcaf34 TM |
5485 | /* |
5486 | * check whether the xattr bucket is filled up with the same hash value. | |
5487 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5488 | * If we want to insert a xattr with different hash value, go ahead | |
5489 | * and ocfs2_divide_xattr_bucket will handle this. | |
5490 | */ | |
01225596 | 5491 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5492 | struct ocfs2_xattr_bucket *bucket, |
5493 | const char *name) | |
01225596 | 5494 | { |
3e632946 | 5495 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5496 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5497 | ||
5498 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5499 | return 0; | |
01225596 TM |
5500 | |
5501 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5502 | xh->xh_entries[0].xe_name_hash) { | |
5503 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5504 | "hash = %u\n", | |
9c7759aa | 5505 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5506 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5507 | return -ENOSPC; | |
5508 | } | |
5509 | ||
5510 | return 0; | |
5511 | } | |
5512 | ||
c5d95df5 JB |
5513 | /* |
5514 | * Try to set the entry in the current bucket. If we fail, the caller | |
5515 | * will handle getting us another bucket. | |
5516 | */ | |
5517 | static int ocfs2_xattr_set_entry_bucket(struct inode *inode, | |
5518 | struct ocfs2_xattr_info *xi, | |
5519 | struct ocfs2_xattr_search *xs, | |
5520 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5521 | { |
c5d95df5 JB |
5522 | int ret; |
5523 | struct ocfs2_xa_loc loc; | |
01225596 | 5524 | |
c5d95df5 | 5525 | mlog_entry("Set xattr %s in xattr bucket\n", xi->xi_name); |
01225596 | 5526 | |
c5d95df5 JB |
5527 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
5528 | xs->not_found ? NULL : xs->here); | |
5529 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
5530 | if (!ret) { | |
5531 | xs->here = loc.xl_entry; | |
5532 | goto out; | |
5533 | } | |
5534 | if (ret != -ENOSPC) { | |
5535 | mlog_errno(ret); | |
5536 | goto out; | |
5537 | } | |
01225596 | 5538 | |
c5d95df5 JB |
5539 | /* Ok, we need space. Let's try defragmenting the bucket. */ |
5540 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, | |
5541 | xs->bucket); | |
5542 | if (ret) { | |
5543 | mlog_errno(ret); | |
5544 | goto out; | |
5545 | } | |
01225596 | 5546 | |
c5d95df5 JB |
5547 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
5548 | if (!ret) { | |
5549 | xs->here = loc.xl_entry; | |
5550 | goto out; | |
01225596 | 5551 | } |
c5d95df5 JB |
5552 | if (ret != -ENOSPC) |
5553 | mlog_errno(ret); | |
01225596 | 5554 | |
01225596 | 5555 | |
c5d95df5 JB |
5556 | out: |
5557 | mlog_exit(ret); | |
5558 | return ret; | |
5559 | } | |
01225596 | 5560 | |
c5d95df5 JB |
5561 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
5562 | struct ocfs2_xattr_info *xi, | |
5563 | struct ocfs2_xattr_search *xs, | |
5564 | struct ocfs2_xattr_set_ctxt *ctxt) | |
5565 | { | |
5566 | int ret; | |
01225596 | 5567 | |
c5d95df5 | 5568 | mlog_entry("Set xattr %s in xattr index block\n", xi->xi_name); |
01225596 | 5569 | |
c5d95df5 JB |
5570 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
5571 | if (!ret) | |
5572 | goto out; | |
5573 | if (ret != -ENOSPC) { | |
5574 | mlog_errno(ret); | |
5575 | goto out; | |
5576 | } | |
01225596 | 5577 | |
c5d95df5 | 5578 | /* Ack, need more space. Let's try to get another bucket! */ |
01225596 | 5579 | |
c5d95df5 JB |
5580 | /* |
5581 | * We do not allow for overlapping ranges between buckets. And | |
5582 | * the maximum number of collisions we will allow for then is | |
5583 | * one bucket's worth, so check it here whether we need to | |
5584 | * add a new bucket for the insert. | |
5585 | */ | |
5586 | ret = ocfs2_check_xattr_bucket_collision(inode, | |
91f2033f | 5587 | xs->bucket, |
c5d95df5 JB |
5588 | xi->xi_name); |
5589 | if (ret) { | |
5590 | mlog_errno(ret); | |
5591 | goto out; | |
5592 | } | |
01225596 | 5593 | |
c5d95df5 JB |
5594 | ret = ocfs2_add_new_xattr_bucket(inode, |
5595 | xs->xattr_bh, | |
5596 | xs->bucket, | |
5597 | ctxt); | |
5598 | if (ret) { | |
5599 | mlog_errno(ret); | |
5600 | goto out; | |
01225596 TM |
5601 | } |
5602 | ||
c5d95df5 JB |
5603 | /* |
5604 | * ocfs2_add_new_xattr_bucket() will have updated | |
5605 | * xs->bucket if it moved, but it will not have updated | |
5606 | * any of the other search fields. Thus, we drop it and | |
5607 | * re-search. Everything should be cached, so it'll be | |
5608 | * quick. | |
5609 | */ | |
5610 | ocfs2_xattr_bucket_relse(xs->bucket); | |
5611 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
5612 | xi->xi_name_index, | |
5613 | xi->xi_name, xs); | |
5614 | if (ret && ret != -ENODATA) | |
5615 | goto out; | |
5616 | xs->not_found = ret; | |
5617 | ||
5618 | /* Ok, we have a new bucket, let's try again */ | |
5619 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); | |
5620 | if (ret && (ret != -ENOSPC)) | |
5621 | mlog_errno(ret); | |
5622 | ||
01225596 TM |
5623 | out: |
5624 | mlog_exit(ret); | |
5625 | return ret; | |
5626 | } | |
a3944256 TM |
5627 | |
5628 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5629 | struct ocfs2_xattr_bucket *bucket, | |
5630 | void *para) | |
5631 | { | |
ce9c5a54 | 5632 | int ret = 0, ref_credits; |
3e632946 | 5633 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5634 | u16 i; |
5635 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5636 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5637 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5638 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5639 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5640 | struct ocfs2_xattr_value_root *xv; |
5641 | struct ocfs2_rm_xattr_bucket_para *args = | |
5642 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5643 | |
5644 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5645 | |
5646 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5647 | xe = &xh->xh_entries[i]; | |
5648 | if (ocfs2_xattr_is_local(xe)) | |
5649 | continue; | |
5650 | ||
ce9c5a54 TM |
5651 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5652 | i, &xv, NULL); | |
5653 | ||
5654 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5655 | args->ref_ci, | |
5656 | args->ref_root_bh, | |
5657 | &ctxt.meta_ac, | |
5658 | &ref_credits); | |
5659 | ||
5660 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5661 | if (IS_ERR(ctxt.handle)) { |
5662 | ret = PTR_ERR(ctxt.handle); | |
5663 | mlog_errno(ret); | |
5664 | break; | |
5665 | } | |
5666 | ||
548b0f22 | 5667 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5668 | i, 0, &ctxt); |
88c3b062 TM |
5669 | |
5670 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5671 | if (ctxt.meta_ac) { |
5672 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5673 | ctxt.meta_ac = NULL; | |
5674 | } | |
a3944256 TM |
5675 | if (ret) { |
5676 | mlog_errno(ret); | |
5677 | break; | |
5678 | } | |
5679 | } | |
5680 | ||
ce9c5a54 TM |
5681 | if (ctxt.meta_ac) |
5682 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5683 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5684 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5685 | return ret; |
5686 | } | |
5687 | ||
492a8a33 TM |
5688 | /* |
5689 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5690 | * or change the extent record flag), we need to recalculate | |
5691 | * the metaecc for the whole bucket. So it is done here. | |
5692 | * | |
5693 | * Note: | |
5694 | * We have to give the extra credits for the caller. | |
5695 | */ | |
5696 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5697 | handle_t *handle, | |
5698 | void *para) | |
5699 | { | |
5700 | int ret; | |
5701 | struct ocfs2_xattr_bucket *bucket = | |
5702 | (struct ocfs2_xattr_bucket *)para; | |
5703 | ||
5704 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5705 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5706 | if (ret) { | |
5707 | mlog_errno(ret); | |
5708 | return ret; | |
5709 | } | |
5710 | ||
5711 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5712 | ||
5713 | return 0; | |
5714 | } | |
5715 | ||
5716 | /* | |
5717 | * Special action we need if the xattr value is refcounted. | |
5718 | * | |
5719 | * 1. If the xattr is refcounted, lock the tree. | |
5720 | * 2. CoW the xattr if we are setting the new value and the value | |
5721 | * will be stored outside. | |
5722 | * 3. In other case, decrease_refcount will work for us, so just | |
5723 | * lock the refcount tree, calculate the meta and credits is OK. | |
5724 | * | |
5725 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5726 | * currently CoW is a completed transaction, while this function | |
5727 | * will also lock the allocators and let us deadlock. So we will | |
5728 | * CoW the whole xattr value. | |
5729 | */ | |
5730 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5731 | struct ocfs2_dinode *di, | |
5732 | struct ocfs2_xattr_info *xi, | |
5733 | struct ocfs2_xattr_search *xis, | |
5734 | struct ocfs2_xattr_search *xbs, | |
5735 | struct ocfs2_refcount_tree **ref_tree, | |
5736 | int *meta_add, | |
5737 | int *credits) | |
5738 | { | |
5739 | int ret = 0; | |
5740 | struct ocfs2_xattr_block *xb; | |
5741 | struct ocfs2_xattr_entry *xe; | |
5742 | char *base; | |
5743 | u32 p_cluster, num_clusters; | |
5744 | unsigned int ext_flags; | |
5745 | int name_offset, name_len; | |
5746 | struct ocfs2_xattr_value_buf vb; | |
5747 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5748 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5749 | struct ocfs2_post_refcount refcount; | |
5750 | struct ocfs2_post_refcount *p = NULL; | |
5751 | struct buffer_head *ref_root_bh = NULL; | |
5752 | ||
5753 | if (!xis->not_found) { | |
5754 | xe = xis->here; | |
5755 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5756 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5757 | base = xis->base; | |
5758 | vb.vb_bh = xis->inode_bh; | |
5759 | vb.vb_access = ocfs2_journal_access_di; | |
5760 | } else { | |
5761 | int i, block_off = 0; | |
5762 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5763 | xe = xbs->here; | |
5764 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5765 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5766 | i = xbs->here - xbs->header->xh_entries; | |
5767 | ||
5768 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5769 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5770 | bucket_xh(xbs->bucket), |
5771 | i, &block_off, | |
5772 | &name_offset); | |
5773 | if (ret) { | |
5774 | mlog_errno(ret); | |
5775 | goto out; | |
5776 | } | |
5777 | base = bucket_block(xbs->bucket, block_off); | |
5778 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5779 | vb.vb_access = ocfs2_journal_access; | |
5780 | ||
5781 | if (ocfs2_meta_ecc(osb)) { | |
5782 | /*create parameters for ocfs2_post_refcount. */ | |
5783 | bucket = xbs->bucket; | |
5784 | refcount.credits = bucket->bu_blocks; | |
5785 | refcount.para = bucket; | |
5786 | refcount.func = | |
5787 | ocfs2_xattr_bucket_post_refcount; | |
5788 | p = &refcount; | |
5789 | } | |
5790 | } else { | |
5791 | base = xbs->base; | |
5792 | vb.vb_bh = xbs->xattr_bh; | |
5793 | vb.vb_access = ocfs2_journal_access_xb; | |
5794 | } | |
5795 | } | |
5796 | ||
5797 | if (ocfs2_xattr_is_local(xe)) | |
5798 | goto out; | |
5799 | ||
5800 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5801 | (base + name_offset + name_len); | |
5802 | ||
5803 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5804 | &num_clusters, &vb.vb_xv->xr_list, | |
5805 | &ext_flags); | |
5806 | if (ret) { | |
5807 | mlog_errno(ret); | |
5808 | goto out; | |
5809 | } | |
5810 | ||
5811 | /* | |
5812 | * We just need to check the 1st extent record, since we always | |
5813 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5814 | * some REFCOUNT extent recs after the 1st one. | |
5815 | */ | |
5816 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5817 | goto out; | |
5818 | ||
5819 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5820 | 1, ref_tree, &ref_root_bh); | |
5821 | if (ret) { | |
5822 | mlog_errno(ret); | |
5823 | goto out; | |
5824 | } | |
5825 | ||
5826 | /* | |
5827 | * If we are deleting the xattr or the new size will be stored inside, | |
5828 | * cool, leave it there, the xattr truncate process will remove them | |
5829 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5830 | * And the worse case is that every cluster truncate will split the | |
5831 | * refcount tree, and make the original extent become 3. So we will need | |
5832 | * 2 * cluster more extent recs at most. | |
5833 | */ | |
6b240ff6 | 5834 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
492a8a33 TM |
5835 | |
5836 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5837 | &(*ref_tree)->rf_ci, | |
5838 | ref_root_bh, vb.vb_xv, | |
5839 | meta_add, credits); | |
5840 | if (ret) | |
5841 | mlog_errno(ret); | |
5842 | goto out; | |
5843 | } | |
5844 | ||
5845 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5846 | *ref_tree, ref_root_bh, 0, | |
5847 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5848 | if (ret) | |
5849 | mlog_errno(ret); | |
5850 | ||
5851 | out: | |
5852 | brelse(ref_root_bh); | |
5853 | return ret; | |
5854 | } | |
5855 | ||
0129241e TM |
5856 | /* |
5857 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5858 | * The physical clusters will be added to refcount tree. | |
5859 | */ | |
5860 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5861 | struct ocfs2_xattr_value_root *xv, | |
5862 | struct ocfs2_extent_tree *value_et, | |
5863 | struct ocfs2_caching_info *ref_ci, | |
5864 | struct buffer_head *ref_root_bh, | |
5865 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5866 | struct ocfs2_post_refcount *refcount) | |
5867 | { | |
5868 | int ret = 0; | |
5869 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5870 | u32 cpos, p_cluster, num_clusters; | |
5871 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5872 | unsigned int ext_flags; | |
5873 | ||
5874 | cpos = 0; | |
5875 | while (cpos < clusters) { | |
5876 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5877 | &num_clusters, el, &ext_flags); | |
5878 | ||
5879 | cpos += num_clusters; | |
5880 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5881 | continue; | |
5882 | ||
5883 | BUG_ON(!p_cluster); | |
5884 | ||
5885 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5886 | ref_ci, ref_root_bh, | |
5887 | cpos - num_clusters, | |
5888 | p_cluster, num_clusters, | |
5889 | dealloc, refcount); | |
5890 | if (ret) { | |
5891 | mlog_errno(ret); | |
5892 | break; | |
5893 | } | |
5894 | } | |
5895 | ||
5896 | return ret; | |
5897 | } | |
5898 | ||
5899 | /* | |
5900 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5901 | * have value stored outside. | |
5902 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5903 | */ | |
5904 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5905 | struct ocfs2_xattr_value_buf *vb, | |
5906 | struct ocfs2_xattr_header *header, | |
5907 | struct ocfs2_caching_info *ref_ci, | |
5908 | struct buffer_head *ref_root_bh, | |
5909 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5910 | { | |
5911 | ||
5912 | struct ocfs2_xattr_entry *xe; | |
5913 | struct ocfs2_xattr_value_root *xv; | |
5914 | struct ocfs2_extent_tree et; | |
5915 | int i, ret = 0; | |
5916 | ||
5917 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5918 | xe = &header->xh_entries[i]; | |
5919 | ||
5920 | if (ocfs2_xattr_is_local(xe)) | |
5921 | continue; | |
5922 | ||
5923 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5924 | le16_to_cpu(xe->xe_name_offset) + | |
5925 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5926 | ||
5927 | vb->vb_xv = xv; | |
5928 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5929 | ||
5930 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5931 | ref_ci, ref_root_bh, | |
5932 | dealloc, NULL); | |
5933 | if (ret) { | |
5934 | mlog_errno(ret); | |
5935 | break; | |
5936 | } | |
5937 | } | |
5938 | ||
5939 | return ret; | |
5940 | } | |
5941 | ||
5942 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5943 | struct buffer_head *fe_bh, | |
5944 | struct ocfs2_caching_info *ref_ci, | |
5945 | struct buffer_head *ref_root_bh, | |
5946 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5947 | { | |
5948 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5949 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5950 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5951 | le16_to_cpu(di->i_xattr_inline_size)); | |
5952 | struct ocfs2_xattr_value_buf vb = { | |
5953 | .vb_bh = fe_bh, | |
5954 | .vb_access = ocfs2_journal_access_di, | |
5955 | }; | |
5956 | ||
5957 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5958 | ref_ci, ref_root_bh, dealloc); | |
5959 | } | |
5960 | ||
5961 | struct ocfs2_xattr_tree_value_refcount_para { | |
5962 | struct ocfs2_caching_info *ref_ci; | |
5963 | struct buffer_head *ref_root_bh; | |
5964 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
5965 | }; | |
5966 | ||
5967 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
5968 | struct ocfs2_xattr_bucket *bucket, | |
5969 | int offset, | |
5970 | struct ocfs2_xattr_value_root **xv, | |
5971 | struct buffer_head **bh) | |
5972 | { | |
5973 | int ret, block_off, name_offset; | |
5974 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
5975 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
5976 | void *base; | |
5977 | ||
5978 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
5979 | bucket_xh(bucket), | |
5980 | offset, | |
5981 | &block_off, | |
5982 | &name_offset); | |
5983 | if (ret) { | |
5984 | mlog_errno(ret); | |
5985 | goto out; | |
5986 | } | |
5987 | ||
5988 | base = bucket_block(bucket, block_off); | |
5989 | ||
5990 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
5991 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5992 | ||
5993 | if (bh) | |
5994 | *bh = bucket->bu_bhs[block_off]; | |
5995 | out: | |
5996 | return ret; | |
5997 | } | |
5998 | ||
5999 | /* | |
6000 | * For a given xattr bucket, refcount all the entries which | |
6001 | * have value stored outside. | |
6002 | */ | |
6003 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
6004 | struct ocfs2_xattr_bucket *bucket, | |
6005 | void *para) | |
6006 | { | |
6007 | int i, ret = 0; | |
6008 | struct ocfs2_extent_tree et; | |
6009 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
6010 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
6011 | struct ocfs2_xattr_header *xh = | |
6012 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6013 | struct ocfs2_xattr_entry *xe; | |
6014 | struct ocfs2_xattr_value_buf vb = { | |
6015 | .vb_access = ocfs2_journal_access, | |
6016 | }; | |
6017 | struct ocfs2_post_refcount refcount = { | |
6018 | .credits = bucket->bu_blocks, | |
6019 | .para = bucket, | |
6020 | .func = ocfs2_xattr_bucket_post_refcount, | |
6021 | }; | |
6022 | struct ocfs2_post_refcount *p = NULL; | |
6023 | ||
6024 | /* We only need post_refcount if we support metaecc. */ | |
6025 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
6026 | p = &refcount; | |
6027 | ||
6028 | mlog(0, "refcount bucket %llu, count = %u\n", | |
6029 | (unsigned long long)bucket_blkno(bucket), | |
6030 | le16_to_cpu(xh->xh_count)); | |
6031 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6032 | xe = &xh->xh_entries[i]; | |
6033 | ||
6034 | if (ocfs2_xattr_is_local(xe)) | |
6035 | continue; | |
6036 | ||
6037 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
6038 | &vb.vb_xv, &vb.vb_bh); | |
6039 | if (ret) { | |
6040 | mlog_errno(ret); | |
6041 | break; | |
6042 | } | |
6043 | ||
6044 | ocfs2_init_xattr_value_extent_tree(&et, | |
6045 | INODE_CACHE(inode), &vb); | |
6046 | ||
6047 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
6048 | &et, ref->ref_ci, | |
6049 | ref->ref_root_bh, | |
6050 | ref->dealloc, p); | |
6051 | if (ret) { | |
6052 | mlog_errno(ret); | |
6053 | break; | |
6054 | } | |
6055 | } | |
6056 | ||
6057 | return ret; | |
6058 | ||
6059 | } | |
6060 | ||
6061 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
6062 | struct buffer_head *root_bh, | |
6063 | u64 blkno, u32 cpos, u32 len, void *para) | |
6064 | { | |
6065 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
6066 | ocfs2_xattr_bucket_value_refcount, | |
6067 | para); | |
6068 | } | |
6069 | ||
6070 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
6071 | struct buffer_head *blk_bh, | |
6072 | struct ocfs2_caching_info *ref_ci, | |
6073 | struct buffer_head *ref_root_bh, | |
6074 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6075 | { | |
6076 | int ret = 0; | |
6077 | struct ocfs2_xattr_block *xb = | |
6078 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6079 | ||
6080 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
6081 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
6082 | struct ocfs2_xattr_value_buf vb = { | |
6083 | .vb_bh = blk_bh, | |
6084 | .vb_access = ocfs2_journal_access_xb, | |
6085 | }; | |
6086 | ||
6087 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6088 | ref_ci, ref_root_bh, | |
6089 | dealloc); | |
6090 | } else { | |
6091 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
6092 | .ref_ci = ref_ci, | |
6093 | .ref_root_bh = ref_root_bh, | |
6094 | .dealloc = dealloc, | |
6095 | }; | |
6096 | ||
6097 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
6098 | ocfs2_refcount_xattr_tree_rec, | |
6099 | ¶); | |
6100 | } | |
6101 | ||
6102 | return ret; | |
6103 | } | |
6104 | ||
6105 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
6106 | struct buffer_head *fe_bh, | |
6107 | struct ocfs2_caching_info *ref_ci, | |
6108 | struct buffer_head *ref_root_bh, | |
6109 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6110 | { | |
6111 | int ret = 0; | |
6112 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
6113 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6114 | struct buffer_head *blk_bh = NULL; | |
6115 | ||
6116 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6117 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
6118 | ref_ci, ref_root_bh, | |
6119 | dealloc); | |
6120 | if (ret) { | |
6121 | mlog_errno(ret); | |
6122 | goto out; | |
6123 | } | |
6124 | } | |
6125 | ||
6126 | if (!di->i_xattr_loc) | |
6127 | goto out; | |
6128 | ||
6129 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
6130 | &blk_bh); | |
6131 | if (ret < 0) { | |
6132 | mlog_errno(ret); | |
6133 | goto out; | |
6134 | } | |
6135 | ||
6136 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
6137 | ref_root_bh, dealloc); | |
6138 | if (ret) | |
6139 | mlog_errno(ret); | |
6140 | ||
6141 | brelse(blk_bh); | |
6142 | out: | |
6143 | ||
6144 | return ret; | |
6145 | } | |
6146 | ||
0fe9b66c | 6147 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6148 | /* |
6149 | * Store the information we need in xattr reflink. | |
6150 | * old_bh and new_bh are inode bh for the old and new inode. | |
6151 | */ | |
6152 | struct ocfs2_xattr_reflink { | |
6153 | struct inode *old_inode; | |
6154 | struct inode *new_inode; | |
6155 | struct buffer_head *old_bh; | |
6156 | struct buffer_head *new_bh; | |
6157 | struct ocfs2_caching_info *ref_ci; | |
6158 | struct buffer_head *ref_root_bh; | |
6159 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6160 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6161 | }; |
6162 | ||
6163 | /* | |
6164 | * Given a xattr header and xe offset, | |
6165 | * return the proper xv and the corresponding bh. | |
6166 | * xattr in inode, block and xattr tree have different implementaions. | |
6167 | */ | |
6168 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6169 | struct buffer_head *bh, | |
6170 | struct ocfs2_xattr_header *xh, | |
6171 | int offset, | |
6172 | struct ocfs2_xattr_value_root **xv, | |
6173 | struct buffer_head **ret_bh, | |
6174 | void *para); | |
6175 | ||
6176 | /* | |
6177 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6178 | * credits we need if we create them from the scratch. | |
6179 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6180 | */ | |
6181 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6182 | struct buffer_head *bh, | |
6183 | struct ocfs2_xattr_header *xh, | |
6184 | int *metas, int *credits, | |
6185 | int *num_recs, | |
6186 | get_xattr_value_root *func, | |
6187 | void *para) | |
6188 | { | |
6189 | int i, ret = 0; | |
6190 | struct ocfs2_xattr_value_root *xv; | |
6191 | struct ocfs2_xattr_entry *xe; | |
6192 | ||
6193 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6194 | xe = &xh->xh_entries[i]; | |
6195 | if (ocfs2_xattr_is_local(xe)) | |
6196 | continue; | |
6197 | ||
6198 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6199 | if (ret) { | |
6200 | mlog_errno(ret); | |
6201 | break; | |
6202 | } | |
6203 | ||
6204 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6205 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6206 | ||
6207 | *credits += ocfs2_calc_extend_credits(sb, | |
6208 | &def_xv.xv.xr_list, | |
6209 | le32_to_cpu(xv->xr_clusters)); | |
6210 | ||
6211 | /* | |
6212 | * If the value is a tree with depth > 1, We don't go deep | |
6213 | * to the extent block, so just calculate a maximum record num. | |
6214 | */ | |
6215 | if (!xv->xr_list.l_tree_depth) | |
8ff6af88 | 6216 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
2999d12f TM |
6217 | else |
6218 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6219 | XATTR_SIZE_MAX); | |
6220 | } | |
6221 | ||
6222 | return ret; | |
6223 | } | |
6224 | ||
6225 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6226 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6227 | struct buffer_head *bh, | |
6228 | struct ocfs2_xattr_header *xh, | |
6229 | int offset, | |
6230 | struct ocfs2_xattr_value_root **xv, | |
6231 | struct buffer_head **ret_bh, | |
6232 | void *para) | |
6233 | { | |
6234 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6235 | ||
6236 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6237 | le16_to_cpu(xe->xe_name_offset) + | |
6238 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6239 | ||
6240 | if (ret_bh) | |
6241 | *ret_bh = bh; | |
6242 | ||
6243 | return 0; | |
6244 | } | |
6245 | ||
6246 | /* | |
6247 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6248 | * It is only used for inline xattr and xattr block. | |
6249 | */ | |
6250 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6251 | struct ocfs2_xattr_header *xh, | |
6252 | struct buffer_head *ref_root_bh, | |
6253 | int *credits, | |
6254 | struct ocfs2_alloc_context **meta_ac) | |
6255 | { | |
6256 | int ret, meta_add = 0, num_recs = 0; | |
6257 | struct ocfs2_refcount_block *rb = | |
6258 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6259 | ||
6260 | *credits = 0; | |
6261 | ||
6262 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6263 | &meta_add, credits, &num_recs, | |
6264 | ocfs2_get_xattr_value_root, | |
6265 | NULL); | |
6266 | if (ret) { | |
6267 | mlog_errno(ret); | |
6268 | goto out; | |
6269 | } | |
6270 | ||
6271 | /* | |
6272 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6273 | * an approximate number we need for refcount tree change. | |
6274 | * Sometimes we need to split the tree, and after split, half recs | |
6275 | * will be moved to the new block, and a new block can only provide | |
6276 | * half number of recs. So we multiple new blocks by 2. | |
6277 | */ | |
6278 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6279 | meta_add += num_recs; | |
6280 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6281 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6282 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6283 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6284 | else | |
6285 | *credits += 1; | |
6286 | ||
6287 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6288 | if (ret) | |
6289 | mlog_errno(ret); | |
6290 | ||
6291 | out: | |
6292 | return ret; | |
6293 | } | |
6294 | ||
6295 | /* | |
6296 | * Given a xattr header, reflink all the xattrs in this container. | |
6297 | * It can be used for inode, block and bucket. | |
6298 | * | |
6299 | * NOTE: | |
6300 | * Before we call this function, the caller has memcpy the xattr in | |
6301 | * old_xh to the new_xh. | |
0fe9b66c TM |
6302 | * |
6303 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6304 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6305 | */ |
6306 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6307 | struct ocfs2_xattr_reflink *args, | |
6308 | struct buffer_head *old_bh, | |
6309 | struct ocfs2_xattr_header *xh, | |
6310 | struct buffer_head *new_bh, | |
6311 | struct ocfs2_xattr_header *new_xh, | |
6312 | struct ocfs2_xattr_value_buf *vb, | |
6313 | struct ocfs2_alloc_context *meta_ac, | |
6314 | get_xattr_value_root *func, | |
6315 | void *para) | |
6316 | { | |
0fe9b66c | 6317 | int ret = 0, i, j; |
2999d12f TM |
6318 | struct super_block *sb = args->old_inode->i_sb; |
6319 | struct buffer_head *value_bh; | |
0fe9b66c | 6320 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6321 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6322 | struct ocfs2_extent_tree data_et; | |
6323 | u32 clusters, cpos, p_cluster, num_clusters; | |
6324 | unsigned int ext_flags = 0; | |
6325 | ||
6326 | mlog(0, "reflink xattr in container %llu, count = %u\n", | |
6327 | (unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6328 | |
6329 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6330 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6331 | xe = &xh->xh_entries[i]; |
6332 | ||
0fe9b66c TM |
6333 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6334 | xe = &new_xh->xh_entries[j]; | |
6335 | ||
6336 | le16_add_cpu(&new_xh->xh_count, -1); | |
6337 | if (new_xh->xh_count) { | |
6338 | memmove(xe, xe + 1, | |
6339 | (void *)last - (void *)xe); | |
6340 | memset(last, 0, | |
6341 | sizeof(struct ocfs2_xattr_entry)); | |
6342 | } | |
6343 | ||
6344 | /* | |
6345 | * We don't want j to increase in the next round since | |
6346 | * it is already moved ahead. | |
6347 | */ | |
6348 | j--; | |
6349 | continue; | |
6350 | } | |
6351 | ||
2999d12f TM |
6352 | if (ocfs2_xattr_is_local(xe)) |
6353 | continue; | |
6354 | ||
6355 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6356 | if (ret) { | |
6357 | mlog_errno(ret); | |
6358 | break; | |
6359 | } | |
6360 | ||
0fe9b66c | 6361 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6362 | if (ret) { |
6363 | mlog_errno(ret); | |
6364 | break; | |
6365 | } | |
6366 | ||
6367 | /* | |
6368 | * For the xattr which has l_tree_depth = 0, all the extent | |
6369 | * recs have already be copied to the new xh with the | |
6370 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6371 | * increase the refount count int the refcount tree. | |
6372 | * | |
6373 | * For the xattr which has l_tree_depth > 0, we need | |
6374 | * to initialize it to the empty default value root, | |
6375 | * and then insert the extents one by one. | |
6376 | */ | |
6377 | if (xv->xr_list.l_tree_depth) { | |
6378 | memcpy(new_xv, &def_xv, sizeof(def_xv)); | |
6379 | vb->vb_xv = new_xv; | |
6380 | vb->vb_bh = value_bh; | |
6381 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6382 | INODE_CACHE(args->new_inode), vb); | |
6383 | } | |
6384 | ||
6385 | clusters = le32_to_cpu(xv->xr_clusters); | |
6386 | cpos = 0; | |
6387 | while (cpos < clusters) { | |
6388 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6389 | cpos, | |
6390 | &p_cluster, | |
6391 | &num_clusters, | |
6392 | &xv->xr_list, | |
6393 | &ext_flags); | |
6394 | if (ret) { | |
6395 | mlog_errno(ret); | |
6396 | goto out; | |
6397 | } | |
6398 | ||
6399 | BUG_ON(!p_cluster); | |
6400 | ||
6401 | if (xv->xr_list.l_tree_depth) { | |
6402 | ret = ocfs2_insert_extent(handle, | |
6403 | &data_et, cpos, | |
6404 | ocfs2_clusters_to_blocks( | |
6405 | args->old_inode->i_sb, | |
6406 | p_cluster), | |
6407 | num_clusters, ext_flags, | |
6408 | meta_ac); | |
6409 | if (ret) { | |
6410 | mlog_errno(ret); | |
6411 | goto out; | |
6412 | } | |
6413 | } | |
6414 | ||
6415 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6416 | args->ref_root_bh, | |
6417 | p_cluster, num_clusters, | |
6418 | meta_ac, args->dealloc); | |
6419 | if (ret) { | |
6420 | mlog_errno(ret); | |
6421 | goto out; | |
6422 | } | |
6423 | ||
6424 | cpos += num_clusters; | |
6425 | } | |
6426 | } | |
6427 | ||
6428 | out: | |
6429 | return ret; | |
6430 | } | |
6431 | ||
6432 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6433 | { | |
6434 | int ret = 0, credits = 0; | |
6435 | handle_t *handle; | |
6436 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6437 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6438 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6439 | int header_off = osb->sb->s_blocksize - inline_size; | |
6440 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6441 | (args->old_bh->b_data + header_off); | |
6442 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6443 | (args->new_bh->b_data + header_off); | |
6444 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6445 | struct ocfs2_inode_info *new_oi; | |
6446 | struct ocfs2_dinode *new_di; | |
6447 | struct ocfs2_xattr_value_buf vb = { | |
6448 | .vb_bh = args->new_bh, | |
6449 | .vb_access = ocfs2_journal_access_di, | |
6450 | }; | |
6451 | ||
6452 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6453 | &credits, &meta_ac); | |
6454 | if (ret) { | |
6455 | mlog_errno(ret); | |
6456 | goto out; | |
6457 | } | |
6458 | ||
6459 | handle = ocfs2_start_trans(osb, credits); | |
6460 | if (IS_ERR(handle)) { | |
6461 | ret = PTR_ERR(handle); | |
6462 | mlog_errno(ret); | |
6463 | goto out; | |
6464 | } | |
6465 | ||
6466 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6467 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6468 | if (ret) { | |
6469 | mlog_errno(ret); | |
6470 | goto out_commit; | |
6471 | } | |
6472 | ||
6473 | memcpy(args->new_bh->b_data + header_off, | |
6474 | args->old_bh->b_data + header_off, inline_size); | |
6475 | ||
6476 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6477 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6478 | ||
6479 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6480 | args->new_bh, new_xh, &vb, meta_ac, | |
6481 | ocfs2_get_xattr_value_root, NULL); | |
6482 | if (ret) { | |
6483 | mlog_errno(ret); | |
6484 | goto out_commit; | |
6485 | } | |
6486 | ||
6487 | new_oi = OCFS2_I(args->new_inode); | |
6488 | spin_lock(&new_oi->ip_lock); | |
6489 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6490 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6491 | spin_unlock(&new_oi->ip_lock); | |
6492 | ||
6493 | ocfs2_journal_dirty(handle, args->new_bh); | |
6494 | ||
6495 | out_commit: | |
6496 | ocfs2_commit_trans(osb, handle); | |
6497 | ||
6498 | out: | |
6499 | if (meta_ac) | |
6500 | ocfs2_free_alloc_context(meta_ac); | |
6501 | return ret; | |
6502 | } | |
6503 | ||
6504 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6505 | struct buffer_head *fe_bh, | |
6506 | struct buffer_head **ret_bh, | |
6507 | int indexed) | |
6508 | { | |
6509 | int ret; | |
2999d12f | 6510 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
b2317968 | 6511 | struct ocfs2_xattr_set_ctxt ctxt; |
2999d12f | 6512 | |
b2317968 TM |
6513 | memset(&ctxt, 0, sizeof(ctxt)); |
6514 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac); | |
2999d12f TM |
6515 | if (ret < 0) { |
6516 | mlog_errno(ret); | |
6517 | return ret; | |
6518 | } | |
6519 | ||
d3981544 JB |
6520 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); |
6521 | if (IS_ERR(ctxt.handle)) { | |
6522 | ret = PTR_ERR(ctxt.handle); | |
2999d12f TM |
6523 | mlog_errno(ret); |
6524 | goto out; | |
6525 | } | |
6526 | ||
6527 | mlog(0, "create new xattr block for inode %llu, index = %d\n", | |
6528 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
d3981544 JB |
6529 | ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed, |
6530 | ret_bh); | |
2999d12f TM |
6531 | if (ret) |
6532 | mlog_errno(ret); | |
6533 | ||
d3981544 | 6534 | ocfs2_commit_trans(osb, ctxt.handle); |
2999d12f | 6535 | out: |
b2317968 | 6536 | ocfs2_free_alloc_context(ctxt.meta_ac); |
2999d12f TM |
6537 | return ret; |
6538 | } | |
6539 | ||
6540 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6541 | struct buffer_head *blk_bh, | |
6542 | struct buffer_head *new_blk_bh) | |
6543 | { | |
6544 | int ret = 0, credits = 0; | |
6545 | handle_t *handle; | |
6546 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6547 | struct ocfs2_dinode *new_di; | |
6548 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6549 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6550 | struct ocfs2_xattr_block *xb = | |
6551 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6552 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6553 | struct ocfs2_xattr_block *new_xb = | |
6554 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6555 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6556 | struct ocfs2_alloc_context *meta_ac; | |
6557 | struct ocfs2_xattr_value_buf vb = { | |
6558 | .vb_bh = new_blk_bh, | |
6559 | .vb_access = ocfs2_journal_access_xb, | |
6560 | }; | |
6561 | ||
6562 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6563 | &credits, &meta_ac); | |
6564 | if (ret) { | |
6565 | mlog_errno(ret); | |
6566 | return ret; | |
6567 | } | |
6568 | ||
6569 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6570 | handle = ocfs2_start_trans(osb, credits + 1); | |
6571 | if (IS_ERR(handle)) { | |
6572 | ret = PTR_ERR(handle); | |
6573 | mlog_errno(ret); | |
6574 | goto out; | |
6575 | } | |
6576 | ||
6577 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6578 | ret = ocfs2_journal_access_di(handle, | |
6579 | INODE_CACHE(args->new_inode), | |
6580 | args->new_bh, | |
6581 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6582 | if (ret) { | |
6583 | mlog_errno(ret); | |
6584 | goto out_commit; | |
6585 | } | |
6586 | } | |
6587 | ||
6588 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6589 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6590 | if (ret) { | |
6591 | mlog_errno(ret); | |
6592 | goto out_commit; | |
6593 | } | |
6594 | ||
6595 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6596 | osb->sb->s_blocksize - header_off); | |
6597 | ||
6598 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6599 | new_blk_bh, new_xh, &vb, meta_ac, | |
6600 | ocfs2_get_xattr_value_root, NULL); | |
6601 | if (ret) { | |
6602 | mlog_errno(ret); | |
6603 | goto out_commit; | |
6604 | } | |
6605 | ||
6606 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6607 | ||
6608 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6609 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6610 | spin_lock(&new_oi->ip_lock); | |
6611 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6612 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6613 | spin_unlock(&new_oi->ip_lock); | |
6614 | ||
6615 | ocfs2_journal_dirty(handle, args->new_bh); | |
6616 | } | |
6617 | ||
6618 | out_commit: | |
6619 | ocfs2_commit_trans(osb, handle); | |
6620 | ||
6621 | out: | |
6622 | ocfs2_free_alloc_context(meta_ac); | |
6623 | return ret; | |
6624 | } | |
6625 | ||
6626 | struct ocfs2_reflink_xattr_tree_args { | |
6627 | struct ocfs2_xattr_reflink *reflink; | |
6628 | struct buffer_head *old_blk_bh; | |
6629 | struct buffer_head *new_blk_bh; | |
6630 | struct ocfs2_xattr_bucket *old_bucket; | |
6631 | struct ocfs2_xattr_bucket *new_bucket; | |
6632 | }; | |
6633 | ||
6634 | /* | |
6635 | * NOTE: | |
6636 | * We have to handle the case that both old bucket and new bucket | |
6637 | * will call this function to get the right ret_bh. | |
6638 | * So The caller must give us the right bh. | |
6639 | */ | |
6640 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6641 | struct buffer_head *bh, | |
6642 | struct ocfs2_xattr_header *xh, | |
6643 | int offset, | |
6644 | struct ocfs2_xattr_value_root **xv, | |
6645 | struct buffer_head **ret_bh, | |
6646 | void *para) | |
6647 | { | |
6648 | struct ocfs2_reflink_xattr_tree_args *args = | |
6649 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6650 | struct ocfs2_xattr_bucket *bucket; | |
6651 | ||
6652 | if (bh == args->old_bucket->bu_bhs[0]) | |
6653 | bucket = args->old_bucket; | |
6654 | else | |
6655 | bucket = args->new_bucket; | |
6656 | ||
6657 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6658 | xv, ret_bh); | |
6659 | } | |
6660 | ||
6661 | struct ocfs2_value_tree_metas { | |
6662 | int num_metas; | |
6663 | int credits; | |
6664 | int num_recs; | |
6665 | }; | |
6666 | ||
6667 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6668 | struct buffer_head *bh, | |
6669 | struct ocfs2_xattr_header *xh, | |
6670 | int offset, | |
6671 | struct ocfs2_xattr_value_root **xv, | |
6672 | struct buffer_head **ret_bh, | |
6673 | void *para) | |
6674 | { | |
6675 | struct ocfs2_xattr_bucket *bucket = | |
6676 | (struct ocfs2_xattr_bucket *)para; | |
6677 | ||
6678 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6679 | xv, ret_bh); | |
6680 | } | |
6681 | ||
6682 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6683 | struct ocfs2_xattr_bucket *bucket, | |
6684 | void *para) | |
6685 | { | |
6686 | struct ocfs2_value_tree_metas *metas = | |
6687 | (struct ocfs2_value_tree_metas *)para; | |
6688 | struct ocfs2_xattr_header *xh = | |
6689 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6690 | ||
6691 | /* Add the credits for this bucket first. */ | |
6692 | metas->credits += bucket->bu_blocks; | |
6693 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6694 | xh, &metas->num_metas, | |
6695 | &metas->credits, &metas->num_recs, | |
6696 | ocfs2_value_tree_metas_in_bucket, | |
6697 | bucket); | |
6698 | } | |
6699 | ||
6700 | /* | |
6701 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6702 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6703 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6704 | */ | |
6705 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6706 | struct ocfs2_reflink_xattr_tree_args *args, | |
6707 | struct ocfs2_extent_tree *xt_et, | |
6708 | u64 blkno, u32 len, int *credits, | |
6709 | struct ocfs2_alloc_context **meta_ac, | |
6710 | struct ocfs2_alloc_context **data_ac) | |
6711 | { | |
6712 | int ret, num_free_extents; | |
6713 | struct ocfs2_value_tree_metas metas; | |
6714 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6715 | struct ocfs2_refcount_block *rb; | |
6716 | ||
6717 | memset(&metas, 0, sizeof(metas)); | |
6718 | ||
6719 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6720 | ocfs2_calc_value_tree_metas, &metas); | |
6721 | if (ret) { | |
6722 | mlog_errno(ret); | |
6723 | goto out; | |
6724 | } | |
6725 | ||
6726 | *credits = metas.credits; | |
6727 | ||
6728 | /* | |
6729 | * Calculate we need for refcount tree change. | |
6730 | * | |
6731 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6732 | * an approximate number we need for refcount tree change. | |
6733 | * Sometimes we need to split the tree, and after split, half recs | |
6734 | * will be moved to the new block, and a new block can only provide | |
6735 | * half number of recs. So we multiple new blocks by 2. | |
6736 | * In the end, we have to add credits for modifying the already | |
6737 | * existed refcount block. | |
6738 | */ | |
6739 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6740 | metas.num_recs = | |
6741 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6742 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6743 | metas.num_metas += metas.num_recs; | |
6744 | *credits += metas.num_recs + | |
6745 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6746 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6747 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6748 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6749 | else | |
6750 | *credits += 1; | |
6751 | ||
6752 | /* count in the xattr tree change. */ | |
6753 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); | |
6754 | if (num_free_extents < 0) { | |
6755 | ret = num_free_extents; | |
6756 | mlog_errno(ret); | |
6757 | goto out; | |
6758 | } | |
6759 | ||
6760 | if (num_free_extents < len) | |
6761 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6762 | ||
6763 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
6764 | xt_et->et_root_el, len); | |
6765 | ||
6766 | if (metas.num_metas) { | |
6767 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6768 | meta_ac); | |
6769 | if (ret) { | |
6770 | mlog_errno(ret); | |
6771 | goto out; | |
6772 | } | |
6773 | } | |
6774 | ||
6775 | if (len) { | |
6776 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6777 | if (ret) | |
6778 | mlog_errno(ret); | |
6779 | } | |
6780 | out: | |
6781 | if (ret) { | |
6782 | if (*meta_ac) { | |
6783 | ocfs2_free_alloc_context(*meta_ac); | |
6784 | meta_ac = NULL; | |
6785 | } | |
6786 | } | |
6787 | ||
6788 | return ret; | |
6789 | } | |
6790 | ||
6791 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6792 | u64 blkno, u64 new_blkno, u32 clusters, | |
6793 | struct ocfs2_alloc_context *meta_ac, | |
6794 | struct ocfs2_alloc_context *data_ac, | |
6795 | struct ocfs2_reflink_xattr_tree_args *args) | |
6796 | { | |
6797 | int i, j, ret = 0; | |
6798 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
6799 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
6800 | u32 num_buckets = clusters * bpc; | |
6801 | int bpb = args->old_bucket->bu_blocks; | |
6802 | struct ocfs2_xattr_value_buf vb = { | |
6803 | .vb_access = ocfs2_journal_access, | |
6804 | }; | |
6805 | ||
6806 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6807 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6808 | if (ret) { | |
6809 | mlog_errno(ret); | |
6810 | break; | |
6811 | } | |
6812 | ||
6813 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno); | |
6814 | if (ret) { | |
6815 | mlog_errno(ret); | |
6816 | break; | |
6817 | } | |
6818 | ||
6819 | /* | |
6820 | * The real bucket num in this series of blocks is stored | |
6821 | * in the 1st bucket. | |
6822 | */ | |
6823 | if (i == 0) | |
6824 | num_buckets = le16_to_cpu( | |
6825 | bucket_xh(args->old_bucket)->xh_num_buckets); | |
6826 | ||
6827 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6828 | args->new_bucket, | |
6829 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6830 | if (ret) { | |
6831 | mlog_errno(ret); | |
6832 | break; | |
6833 | } | |
6834 | ||
6835 | for (j = 0; j < bpb; j++) | |
6836 | memcpy(bucket_block(args->new_bucket, j), | |
6837 | bucket_block(args->old_bucket, j), | |
6838 | sb->s_blocksize); | |
6839 | ||
6840 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6841 | ||
6842 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6843 | args->old_bucket->bu_bhs[0], | |
6844 | bucket_xh(args->old_bucket), | |
6845 | args->new_bucket->bu_bhs[0], | |
6846 | bucket_xh(args->new_bucket), | |
6847 | &vb, meta_ac, | |
6848 | ocfs2_get_reflink_xattr_value_root, | |
6849 | args); | |
6850 | if (ret) { | |
6851 | mlog_errno(ret); | |
6852 | break; | |
6853 | } | |
6854 | ||
6855 | /* | |
6856 | * Re-access and dirty the bucket to calculate metaecc. | |
6857 | * Because we may extend the transaction in reflink_xattr_header | |
6858 | * which will let the already accessed block gone. | |
6859 | */ | |
6860 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6861 | args->new_bucket, | |
6862 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6863 | if (ret) { | |
6864 | mlog_errno(ret); | |
6865 | break; | |
6866 | } | |
6867 | ||
6868 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6869 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6870 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6871 | } | |
6872 | ||
6873 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6874 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6875 | return ret; | |
6876 | } | |
6877 | /* | |
6878 | * Create the same xattr extent record in the new inode's xattr tree. | |
6879 | */ | |
6880 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6881 | struct buffer_head *root_bh, | |
6882 | u64 blkno, | |
6883 | u32 cpos, | |
6884 | u32 len, | |
6885 | void *para) | |
6886 | { | |
6887 | int ret, credits = 0; | |
6888 | u32 p_cluster, num_clusters; | |
6889 | u64 new_blkno; | |
6890 | handle_t *handle; | |
6891 | struct ocfs2_reflink_xattr_tree_args *args = | |
6892 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6893 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6894 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6895 | struct ocfs2_alloc_context *data_ac = NULL; | |
6896 | struct ocfs2_extent_tree et; | |
6897 | ||
6898 | ocfs2_init_xattr_tree_extent_tree(&et, | |
6899 | INODE_CACHE(args->reflink->new_inode), | |
6900 | args->new_blk_bh); | |
6901 | ||
6902 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
6903 | len, &credits, | |
6904 | &meta_ac, &data_ac); | |
6905 | if (ret) { | |
6906 | mlog_errno(ret); | |
6907 | goto out; | |
6908 | } | |
6909 | ||
6910 | handle = ocfs2_start_trans(osb, credits); | |
6911 | if (IS_ERR(handle)) { | |
6912 | ret = PTR_ERR(handle); | |
6913 | mlog_errno(ret); | |
6914 | goto out; | |
6915 | } | |
6916 | ||
1ed9b777 | 6917 | ret = ocfs2_claim_clusters(handle, data_ac, |
2999d12f TM |
6918 | len, &p_cluster, &num_clusters); |
6919 | if (ret) { | |
6920 | mlog_errno(ret); | |
6921 | goto out_commit; | |
6922 | } | |
6923 | ||
6924 | new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster); | |
6925 | ||
6926 | mlog(0, "reflink xattr buckets %llu to %llu, len %u\n", | |
6927 | (unsigned long long)blkno, (unsigned long long)new_blkno, len); | |
6928 | ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len, | |
6929 | meta_ac, data_ac, args); | |
6930 | if (ret) { | |
6931 | mlog_errno(ret); | |
6932 | goto out_commit; | |
6933 | } | |
6934 | ||
6935 | mlog(0, "insert new xattr extent rec start %llu len %u to %u\n", | |
6936 | (unsigned long long)new_blkno, len, cpos); | |
6937 | ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno, | |
6938 | len, 0, meta_ac); | |
6939 | if (ret) | |
6940 | mlog_errno(ret); | |
6941 | ||
6942 | out_commit: | |
6943 | ocfs2_commit_trans(osb, handle); | |
6944 | ||
6945 | out: | |
6946 | if (meta_ac) | |
6947 | ocfs2_free_alloc_context(meta_ac); | |
6948 | if (data_ac) | |
6949 | ocfs2_free_alloc_context(data_ac); | |
6950 | return ret; | |
6951 | } | |
6952 | ||
6953 | /* | |
6954 | * Create reflinked xattr buckets. | |
6955 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
6956 | * if they are stored outside. | |
6957 | */ | |
6958 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
6959 | struct buffer_head *blk_bh, | |
6960 | struct buffer_head *new_blk_bh) | |
6961 | { | |
6962 | int ret; | |
6963 | struct ocfs2_reflink_xattr_tree_args para; | |
6964 | ||
6965 | memset(¶, 0, sizeof(para)); | |
6966 | para.reflink = args; | |
6967 | para.old_blk_bh = blk_bh; | |
6968 | para.new_blk_bh = new_blk_bh; | |
6969 | ||
6970 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
6971 | if (!para.old_bucket) { | |
6972 | mlog_errno(-ENOMEM); | |
6973 | return -ENOMEM; | |
6974 | } | |
6975 | ||
6976 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
6977 | if (!para.new_bucket) { | |
6978 | ret = -ENOMEM; | |
6979 | mlog_errno(ret); | |
6980 | goto out; | |
6981 | } | |
6982 | ||
6983 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
6984 | ocfs2_reflink_xattr_rec, | |
6985 | ¶); | |
6986 | if (ret) | |
6987 | mlog_errno(ret); | |
6988 | ||
6989 | out: | |
6990 | ocfs2_xattr_bucket_free(para.old_bucket); | |
6991 | ocfs2_xattr_bucket_free(para.new_bucket); | |
6992 | return ret; | |
6993 | } | |
6994 | ||
6995 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
6996 | struct buffer_head *blk_bh) | |
6997 | { | |
6998 | int ret, indexed = 0; | |
6999 | struct buffer_head *new_blk_bh = NULL; | |
7000 | struct ocfs2_xattr_block *xb = | |
7001 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
7002 | ||
7003 | ||
7004 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
7005 | indexed = 1; | |
7006 | ||
7007 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
7008 | &new_blk_bh, indexed); | |
7009 | if (ret) { | |
7010 | mlog_errno(ret); | |
7011 | goto out; | |
7012 | } | |
7013 | ||
7014 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) | |
7015 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); | |
7016 | else | |
7017 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
7018 | if (ret) | |
7019 | mlog_errno(ret); | |
7020 | ||
7021 | out: | |
7022 | brelse(new_blk_bh); | |
7023 | return ret; | |
7024 | } | |
7025 | ||
0fe9b66c TM |
7026 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
7027 | { | |
7028 | int type = ocfs2_xattr_get_type(xe); | |
7029 | ||
7030 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
7031 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
7032 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
7033 | } | |
7034 | ||
2999d12f TM |
7035 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
7036 | struct buffer_head *old_bh, | |
7037 | struct inode *new_inode, | |
0fe9b66c TM |
7038 | struct buffer_head *new_bh, |
7039 | bool preserve_security) | |
2999d12f TM |
7040 | { |
7041 | int ret; | |
7042 | struct ocfs2_xattr_reflink args; | |
7043 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
7044 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
7045 | struct buffer_head *blk_bh = NULL; | |
7046 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
7047 | struct ocfs2_refcount_tree *ref_tree; | |
7048 | struct buffer_head *ref_root_bh = NULL; | |
7049 | ||
7050 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7051 | le64_to_cpu(di->i_refcount_loc), | |
7052 | 1, &ref_tree, &ref_root_bh); | |
7053 | if (ret) { | |
7054 | mlog_errno(ret); | |
7055 | goto out; | |
7056 | } | |
7057 | ||
7058 | ocfs2_init_dealloc_ctxt(&dealloc); | |
7059 | ||
7060 | args.old_inode = old_inode; | |
7061 | args.new_inode = new_inode; | |
7062 | args.old_bh = old_bh; | |
7063 | args.new_bh = new_bh; | |
7064 | args.ref_ci = &ref_tree->rf_ci; | |
7065 | args.ref_root_bh = ref_root_bh; | |
7066 | args.dealloc = &dealloc; | |
0fe9b66c TM |
7067 | if (preserve_security) |
7068 | args.xattr_reflinked = NULL; | |
7069 | else | |
7070 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
7071 | |
7072 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
7073 | ret = ocfs2_reflink_xattr_inline(&args); | |
7074 | if (ret) { | |
7075 | mlog_errno(ret); | |
7076 | goto out_unlock; | |
7077 | } | |
7078 | } | |
7079 | ||
7080 | if (!di->i_xattr_loc) | |
7081 | goto out_unlock; | |
7082 | ||
7083 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
7084 | &blk_bh); | |
7085 | if (ret < 0) { | |
7086 | mlog_errno(ret); | |
7087 | goto out_unlock; | |
7088 | } | |
7089 | ||
7090 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
7091 | if (ret) | |
7092 | mlog_errno(ret); | |
7093 | ||
7094 | brelse(blk_bh); | |
7095 | ||
7096 | out_unlock: | |
7097 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7098 | ref_tree, 1); | |
7099 | brelse(ref_root_bh); | |
7100 | ||
7101 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
7102 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
7103 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
7104 | } | |
7105 | ||
7106 | out: | |
7107 | return ret; | |
7108 | } | |
7109 | ||
0fe9b66c TM |
7110 | /* |
7111 | * Initialize security and acl for a already created inode. | |
7112 | * Used for reflink a non-preserve-security file. | |
7113 | * | |
7114 | * It uses common api like ocfs2_xattr_set, so the caller | |
7115 | * must not hold any lock expect i_mutex. | |
7116 | */ | |
7117 | int ocfs2_init_security_and_acl(struct inode *dir, | |
7118 | struct inode *inode) | |
7119 | { | |
7120 | int ret = 0; | |
7121 | struct buffer_head *dir_bh = NULL; | |
7122 | struct ocfs2_security_xattr_info si = { | |
7123 | .enable = 1, | |
7124 | }; | |
7125 | ||
7126 | ret = ocfs2_init_security_get(inode, dir, &si); | |
7127 | if (!ret) { | |
431547b3 CH |
7128 | ret = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, |
7129 | si.name, si.value, si.value_len, | |
7130 | XATTR_CREATE); | |
0fe9b66c TM |
7131 | if (ret) { |
7132 | mlog_errno(ret); | |
7133 | goto leave; | |
7134 | } | |
7135 | } else if (ret != -EOPNOTSUPP) { | |
7136 | mlog_errno(ret); | |
7137 | goto leave; | |
7138 | } | |
7139 | ||
7140 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
7141 | if (ret) { | |
7142 | mlog_errno(ret); | |
7143 | goto leave; | |
7144 | } | |
7145 | ||
7146 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); | |
7147 | if (ret) | |
7148 | mlog_errno(ret); | |
7149 | ||
7150 | ocfs2_inode_unlock(dir, 0); | |
7151 | brelse(dir_bh); | |
7152 | leave: | |
7153 | return ret; | |
7154 | } | |
923f7f31 TY |
7155 | /* |
7156 | * 'security' attributes support | |
7157 | */ | |
431547b3 | 7158 | static size_t ocfs2_xattr_security_list(struct dentry *dentry, char *list, |
923f7f31 | 7159 | size_t list_size, const char *name, |
431547b3 | 7160 | size_t name_len, int type) |
923f7f31 TY |
7161 | { |
7162 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
7163 | const size_t total_len = prefix_len + name_len + 1; | |
7164 | ||
7165 | if (list && total_len <= list_size) { | |
7166 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
7167 | memcpy(list + prefix_len, name, name_len); | |
7168 | list[prefix_len + name_len] = '\0'; | |
7169 | } | |
7170 | return total_len; | |
7171 | } | |
7172 | ||
431547b3 CH |
7173 | static int ocfs2_xattr_security_get(struct dentry *dentry, const char *name, |
7174 | void *buffer, size_t size, int type) | |
923f7f31 TY |
7175 | { |
7176 | if (strcmp(name, "") == 0) | |
7177 | return -EINVAL; | |
431547b3 CH |
7178 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
7179 | name, buffer, size); | |
923f7f31 TY |
7180 | } |
7181 | ||
431547b3 CH |
7182 | static int ocfs2_xattr_security_set(struct dentry *dentry, const char *name, |
7183 | const void *value, size_t size, int flags, int type) | |
923f7f31 TY |
7184 | { |
7185 | if (strcmp(name, "") == 0) | |
7186 | return -EINVAL; | |
7187 | ||
431547b3 CH |
7188 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
7189 | name, value, size, flags); | |
923f7f31 TY |
7190 | } |
7191 | ||
534eaddd TY |
7192 | int ocfs2_init_security_get(struct inode *inode, |
7193 | struct inode *dir, | |
7194 | struct ocfs2_security_xattr_info *si) | |
7195 | { | |
38d59ef6 TY |
7196 | /* check whether ocfs2 support feature xattr */ |
7197 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7198 | return -EOPNOTSUPP; | |
534eaddd TY |
7199 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
7200 | &si->value_len); | |
7201 | } | |
7202 | ||
7203 | int ocfs2_init_security_set(handle_t *handle, | |
7204 | struct inode *inode, | |
7205 | struct buffer_head *di_bh, | |
7206 | struct ocfs2_security_xattr_info *si, | |
7207 | struct ocfs2_alloc_context *xattr_ac, | |
7208 | struct ocfs2_alloc_context *data_ac) | |
7209 | { | |
7210 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7211 | OCFS2_XATTR_INDEX_SECURITY, | |
7212 | si->name, si->value, si->value_len, 0, | |
7213 | xattr_ac, data_ac); | |
7214 | } | |
7215 | ||
923f7f31 TY |
7216 | struct xattr_handler ocfs2_xattr_security_handler = { |
7217 | .prefix = XATTR_SECURITY_PREFIX, | |
7218 | .list = ocfs2_xattr_security_list, | |
7219 | .get = ocfs2_xattr_security_get, | |
7220 | .set = ocfs2_xattr_security_set, | |
7221 | }; | |
7222 | ||
99219aea MF |
7223 | /* |
7224 | * 'trusted' attributes support | |
7225 | */ | |
431547b3 | 7226 | static size_t ocfs2_xattr_trusted_list(struct dentry *dentry, char *list, |
99219aea | 7227 | size_t list_size, const char *name, |
431547b3 | 7228 | size_t name_len, int type) |
99219aea | 7229 | { |
ceb1eba3 | 7230 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
7231 | const size_t total_len = prefix_len + name_len + 1; |
7232 | ||
7233 | if (list && total_len <= list_size) { | |
7234 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
7235 | memcpy(list + prefix_len, name, name_len); | |
7236 | list[prefix_len + name_len] = '\0'; | |
7237 | } | |
7238 | return total_len; | |
7239 | } | |
7240 | ||
431547b3 CH |
7241 | static int ocfs2_xattr_trusted_get(struct dentry *dentry, const char *name, |
7242 | void *buffer, size_t size, int type) | |
99219aea MF |
7243 | { |
7244 | if (strcmp(name, "") == 0) | |
7245 | return -EINVAL; | |
431547b3 CH |
7246 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
7247 | name, buffer, size); | |
99219aea MF |
7248 | } |
7249 | ||
431547b3 CH |
7250 | static int ocfs2_xattr_trusted_set(struct dentry *dentry, const char *name, |
7251 | const void *value, size_t size, int flags, int type) | |
99219aea MF |
7252 | { |
7253 | if (strcmp(name, "") == 0) | |
7254 | return -EINVAL; | |
7255 | ||
431547b3 CH |
7256 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
7257 | name, value, size, flags); | |
99219aea MF |
7258 | } |
7259 | ||
7260 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
7261 | .prefix = XATTR_TRUSTED_PREFIX, | |
7262 | .list = ocfs2_xattr_trusted_list, | |
7263 | .get = ocfs2_xattr_trusted_get, | |
7264 | .set = ocfs2_xattr_trusted_set, | |
7265 | }; | |
7266 | ||
99219aea MF |
7267 | /* |
7268 | * 'user' attributes support | |
7269 | */ | |
431547b3 | 7270 | static size_t ocfs2_xattr_user_list(struct dentry *dentry, char *list, |
99219aea | 7271 | size_t list_size, const char *name, |
431547b3 | 7272 | size_t name_len, int type) |
99219aea | 7273 | { |
ceb1eba3 | 7274 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea | 7275 | const size_t total_len = prefix_len + name_len + 1; |
431547b3 | 7276 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7277 | |
7278 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7279 | return 0; | |
7280 | ||
7281 | if (list && total_len <= list_size) { | |
7282 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
7283 | memcpy(list + prefix_len, name, name_len); | |
7284 | list[prefix_len + name_len] = '\0'; | |
7285 | } | |
7286 | return total_len; | |
7287 | } | |
7288 | ||
431547b3 CH |
7289 | static int ocfs2_xattr_user_get(struct dentry *dentry, const char *name, |
7290 | void *buffer, size_t size, int type) | |
99219aea | 7291 | { |
431547b3 | 7292 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7293 | |
7294 | if (strcmp(name, "") == 0) | |
7295 | return -EINVAL; | |
7296 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7297 | return -EOPNOTSUPP; | |
431547b3 | 7298 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_USER, name, |
99219aea MF |
7299 | buffer, size); |
7300 | } | |
7301 | ||
431547b3 CH |
7302 | static int ocfs2_xattr_user_set(struct dentry *dentry, const char *name, |
7303 | const void *value, size_t size, int flags, int type) | |
99219aea | 7304 | { |
431547b3 | 7305 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7306 | |
7307 | if (strcmp(name, "") == 0) | |
7308 | return -EINVAL; | |
7309 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7310 | return -EOPNOTSUPP; | |
7311 | ||
431547b3 CH |
7312 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_USER, |
7313 | name, value, size, flags); | |
99219aea MF |
7314 | } |
7315 | ||
7316 | struct xattr_handler ocfs2_xattr_user_handler = { | |
7317 | .prefix = XATTR_USER_PREFIX, | |
7318 | .list = ocfs2_xattr_user_list, | |
7319 | .get = ocfs2_xattr_user_get, | |
7320 | .set = ocfs2_xattr_user_set, | |
7321 | }; |