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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> | |
cf1d6c76 | 38 | |
f56654c4 TM |
39 | #define MLOG_MASK_PREFIX ML_XATTR |
40 | #include <cluster/masklog.h> | |
41 | ||
42 | #include "ocfs2.h" | |
43 | #include "alloc.h" | |
44 | #include "dlmglue.h" | |
45 | #include "file.h" | |
cf1d6c76 TY |
46 | #include "symlink.h" |
47 | #include "sysfile.h" | |
f56654c4 TM |
48 | #include "inode.h" |
49 | #include "journal.h" | |
50 | #include "ocfs2_fs.h" | |
51 | #include "suballoc.h" | |
52 | #include "uptodate.h" | |
53 | #include "buffer_head_io.h" | |
0c044f0b | 54 | #include "super.h" |
cf1d6c76 TY |
55 | #include "xattr.h" |
56 | ||
57 | ||
58 | struct ocfs2_xattr_def_value_root { | |
59 | struct ocfs2_xattr_value_root xv; | |
60 | struct ocfs2_extent_rec er; | |
61 | }; | |
62 | ||
0c044f0b TM |
63 | struct ocfs2_xattr_bucket { |
64 | struct buffer_head *bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; | |
65 | struct ocfs2_xattr_header *xh; | |
66 | }; | |
67 | ||
cf1d6c76 TY |
68 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
69 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
70 | ||
71 | static struct ocfs2_xattr_def_value_root def_xv = { | |
72 | .xv.xr_list.l_count = cpu_to_le16(1), | |
73 | }; | |
74 | ||
75 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
76 | &ocfs2_xattr_user_handler, | |
77 | &ocfs2_xattr_trusted_handler, | |
78 | NULL | |
79 | }; | |
80 | ||
81 | static struct xattr_handler *ocfs2_xattr_handler_map[] = { | |
82 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, | |
83 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, | |
84 | }; | |
85 | ||
86 | struct ocfs2_xattr_info { | |
87 | int name_index; | |
88 | const char *name; | |
89 | const void *value; | |
90 | size_t value_len; | |
91 | }; | |
92 | ||
93 | struct ocfs2_xattr_search { | |
94 | struct buffer_head *inode_bh; | |
95 | /* | |
96 | * xattr_bh point to the block buffer head which has extended attribute | |
97 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
98 | */ | |
99 | struct buffer_head *xattr_bh; | |
100 | struct ocfs2_xattr_header *header; | |
589dc260 | 101 | struct ocfs2_xattr_bucket bucket; |
cf1d6c76 TY |
102 | void *base; |
103 | void *end; | |
104 | struct ocfs2_xattr_entry *here; | |
105 | int not_found; | |
106 | }; | |
107 | ||
589dc260 TM |
108 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
109 | struct ocfs2_xattr_header *xh, | |
110 | int index, | |
111 | int *block_off, | |
112 | int *new_offset); | |
113 | ||
114 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
115 | struct buffer_head *root_bh, | |
116 | int name_index, | |
117 | const char *name, | |
118 | struct ocfs2_xattr_search *xs); | |
119 | ||
0c044f0b TM |
120 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
121 | struct ocfs2_xattr_tree_root *xt, | |
122 | char *buffer, | |
123 | size_t buffer_size); | |
124 | ||
01225596 TM |
125 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
126 | struct ocfs2_xattr_search *xs); | |
127 | ||
128 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
129 | struct ocfs2_xattr_info *xi, | |
130 | struct ocfs2_xattr_search *xs); | |
131 | ||
a3944256 TM |
132 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
133 | struct buffer_head *xb_bh); | |
134 | ||
936b8834 | 135 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
136 | { |
137 | struct xattr_handler *handler = NULL; | |
138 | ||
139 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
140 | handler = ocfs2_xattr_handler_map[name_index]; | |
141 | ||
936b8834 | 142 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
143 | } |
144 | ||
40daa16a | 145 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 146 | const char *name, |
40daa16a | 147 | int name_len) |
cf1d6c76 TY |
148 | { |
149 | /* Get hash value of uuid from super block */ | |
150 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
151 | int i; | |
152 | ||
cf1d6c76 TY |
153 | /* hash extended attribute name */ |
154 | for (i = 0; i < name_len; i++) { | |
155 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
156 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
157 | *name++; | |
158 | } | |
159 | ||
160 | return hash; | |
161 | } | |
162 | ||
163 | /* | |
164 | * ocfs2_xattr_hash_entry() | |
165 | * | |
166 | * Compute the hash of an extended attribute. | |
167 | */ | |
168 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
169 | struct ocfs2_xattr_header *header, | |
170 | struct ocfs2_xattr_entry *entry) | |
171 | { | |
172 | u32 hash = 0; | |
cf1d6c76 | 173 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 174 | |
2057e5c6 | 175 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
176 | entry->xe_name_hash = cpu_to_le32(hash); |
177 | ||
178 | return; | |
179 | } | |
f56654c4 TM |
180 | |
181 | static int ocfs2_xattr_extend_allocation(struct inode *inode, | |
182 | u32 clusters_to_add, | |
183 | struct buffer_head *xattr_bh, | |
184 | struct ocfs2_xattr_value_root *xv) | |
185 | { | |
186 | int status = 0; | |
187 | int restart_func = 0; | |
188 | int credits = 0; | |
189 | handle_t *handle = NULL; | |
190 | struct ocfs2_alloc_context *data_ac = NULL; | |
191 | struct ocfs2_alloc_context *meta_ac = NULL; | |
192 | enum ocfs2_alloc_restarted why; | |
193 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 | 194 | u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); |
f99b9b7c | 195 | struct ocfs2_extent_tree et; |
f56654c4 TM |
196 | |
197 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
198 | ||
8d6220d6 | 199 | ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
f99b9b7c | 200 | |
f56654c4 TM |
201 | restart_all: |
202 | ||
f99b9b7c JB |
203 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
204 | &data_ac, &meta_ac); | |
f56654c4 TM |
205 | if (status) { |
206 | mlog_errno(status); | |
207 | goto leave; | |
208 | } | |
209 | ||
f99b9b7c JB |
210 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
211 | clusters_to_add); | |
f56654c4 TM |
212 | handle = ocfs2_start_trans(osb, credits); |
213 | if (IS_ERR(handle)) { | |
214 | status = PTR_ERR(handle); | |
215 | handle = NULL; | |
216 | mlog_errno(status); | |
217 | goto leave; | |
218 | } | |
219 | ||
220 | restarted_transaction: | |
221 | status = ocfs2_journal_access(handle, inode, xattr_bh, | |
222 | OCFS2_JOURNAL_ACCESS_WRITE); | |
223 | if (status < 0) { | |
224 | mlog_errno(status); | |
225 | goto leave; | |
226 | } | |
227 | ||
228 | prev_clusters = le32_to_cpu(xv->xr_clusters); | |
229 | status = ocfs2_add_clusters_in_btree(osb, | |
230 | inode, | |
231 | &logical_start, | |
232 | clusters_to_add, | |
233 | 0, | |
f99b9b7c | 234 | &et, |
f56654c4 TM |
235 | handle, |
236 | data_ac, | |
237 | meta_ac, | |
f99b9b7c | 238 | &why); |
f56654c4 TM |
239 | if ((status < 0) && (status != -EAGAIN)) { |
240 | if (status != -ENOSPC) | |
241 | mlog_errno(status); | |
242 | goto leave; | |
243 | } | |
244 | ||
245 | status = ocfs2_journal_dirty(handle, xattr_bh); | |
246 | if (status < 0) { | |
247 | mlog_errno(status); | |
248 | goto leave; | |
249 | } | |
250 | ||
251 | clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; | |
252 | ||
253 | if (why != RESTART_NONE && clusters_to_add) { | |
254 | if (why == RESTART_META) { | |
255 | mlog(0, "restarting function.\n"); | |
256 | restart_func = 1; | |
257 | } else { | |
258 | BUG_ON(why != RESTART_TRANS); | |
259 | ||
260 | mlog(0, "restarting transaction.\n"); | |
261 | /* TODO: This can be more intelligent. */ | |
262 | credits = ocfs2_calc_extend_credits(osb->sb, | |
f99b9b7c | 263 | et.et_root_el, |
f56654c4 TM |
264 | clusters_to_add); |
265 | status = ocfs2_extend_trans(handle, credits); | |
266 | if (status < 0) { | |
267 | /* handle still has to be committed at | |
268 | * this point. */ | |
269 | status = -ENOMEM; | |
270 | mlog_errno(status); | |
271 | goto leave; | |
272 | } | |
273 | goto restarted_transaction; | |
274 | } | |
275 | } | |
276 | ||
277 | leave: | |
278 | if (handle) { | |
279 | ocfs2_commit_trans(osb, handle); | |
280 | handle = NULL; | |
281 | } | |
282 | if (data_ac) { | |
283 | ocfs2_free_alloc_context(data_ac); | |
284 | data_ac = NULL; | |
285 | } | |
286 | if (meta_ac) { | |
287 | ocfs2_free_alloc_context(meta_ac); | |
288 | meta_ac = NULL; | |
289 | } | |
290 | if ((!status) && restart_func) { | |
291 | restart_func = 0; | |
292 | goto restart_all; | |
293 | } | |
294 | ||
295 | return status; | |
296 | } | |
297 | ||
298 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
299 | struct buffer_head *root_bh, | |
300 | struct ocfs2_xattr_value_root *xv, | |
301 | u32 cpos, u32 phys_cpos, u32 len, | |
302 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
303 | { | |
304 | int ret; | |
305 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
306 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
307 | struct inode *tl_inode = osb->osb_tl_inode; | |
308 | handle_t *handle; | |
309 | struct ocfs2_alloc_context *meta_ac = NULL; | |
f99b9b7c JB |
310 | struct ocfs2_extent_tree et; |
311 | ||
8d6220d6 | 312 | ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
f56654c4 | 313 | |
f99b9b7c | 314 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
f56654c4 TM |
315 | if (ret) { |
316 | mlog_errno(ret); | |
317 | return ret; | |
318 | } | |
319 | ||
320 | mutex_lock(&tl_inode->i_mutex); | |
321 | ||
322 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
323 | ret = __ocfs2_flush_truncate_log(osb); | |
324 | if (ret < 0) { | |
325 | mlog_errno(ret); | |
326 | goto out; | |
327 | } | |
328 | } | |
329 | ||
330 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
331 | if (IS_ERR(handle)) { | |
332 | ret = PTR_ERR(handle); | |
333 | mlog_errno(ret); | |
334 | goto out; | |
335 | } | |
336 | ||
337 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
338 | OCFS2_JOURNAL_ACCESS_WRITE); | |
339 | if (ret) { | |
340 | mlog_errno(ret); | |
341 | goto out_commit; | |
342 | } | |
343 | ||
f99b9b7c JB |
344 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
345 | dealloc); | |
f56654c4 TM |
346 | if (ret) { |
347 | mlog_errno(ret); | |
348 | goto out_commit; | |
349 | } | |
350 | ||
351 | le32_add_cpu(&xv->xr_clusters, -len); | |
352 | ||
353 | ret = ocfs2_journal_dirty(handle, root_bh); | |
354 | if (ret) { | |
355 | mlog_errno(ret); | |
356 | goto out_commit; | |
357 | } | |
358 | ||
359 | ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len); | |
360 | if (ret) | |
361 | mlog_errno(ret); | |
362 | ||
363 | out_commit: | |
364 | ocfs2_commit_trans(osb, handle); | |
365 | out: | |
366 | mutex_unlock(&tl_inode->i_mutex); | |
367 | ||
368 | if (meta_ac) | |
369 | ocfs2_free_alloc_context(meta_ac); | |
370 | ||
371 | return ret; | |
372 | } | |
373 | ||
374 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
375 | u32 old_clusters, | |
376 | u32 new_clusters, | |
377 | struct buffer_head *root_bh, | |
378 | struct ocfs2_xattr_value_root *xv) | |
379 | { | |
380 | int ret = 0; | |
381 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
382 | u64 block; | |
383 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
384 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
385 | ||
386 | ocfs2_init_dealloc_ctxt(&dealloc); | |
387 | ||
388 | if (old_clusters <= new_clusters) | |
389 | return 0; | |
390 | ||
391 | cpos = new_clusters; | |
392 | trunc_len = old_clusters - new_clusters; | |
393 | while (trunc_len) { | |
394 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
395 | &alloc_size, &xv->xr_list); | |
396 | if (ret) { | |
397 | mlog_errno(ret); | |
398 | goto out; | |
399 | } | |
400 | ||
401 | if (alloc_size > trunc_len) | |
402 | alloc_size = trunc_len; | |
403 | ||
404 | ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, | |
405 | phys_cpos, alloc_size, | |
406 | &dealloc); | |
407 | if (ret) { | |
408 | mlog_errno(ret); | |
409 | goto out; | |
410 | } | |
411 | ||
412 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
413 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
414 | alloc_size); | |
415 | cpos += alloc_size; | |
416 | trunc_len -= alloc_size; | |
417 | } | |
418 | ||
419 | out: | |
420 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
421 | ocfs2_run_deallocs(osb, &dealloc); | |
422 | ||
423 | return ret; | |
424 | } | |
425 | ||
426 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
427 | struct buffer_head *root_bh, | |
428 | struct ocfs2_xattr_value_root *xv, | |
429 | int len) | |
430 | { | |
431 | int ret; | |
432 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
433 | u32 old_clusters = le32_to_cpu(xv->xr_clusters); | |
434 | ||
435 | if (new_clusters == old_clusters) | |
436 | return 0; | |
437 | ||
438 | if (new_clusters > old_clusters) | |
439 | ret = ocfs2_xattr_extend_allocation(inode, | |
440 | new_clusters - old_clusters, | |
441 | root_bh, xv); | |
442 | else | |
443 | ret = ocfs2_xattr_shrink_size(inode, | |
444 | old_clusters, new_clusters, | |
445 | root_bh, xv); | |
446 | ||
447 | return ret; | |
448 | } | |
cf1d6c76 | 449 | |
936b8834 TM |
450 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
451 | size_t *result, const char *prefix, | |
452 | const char *name, int name_len) | |
453 | { | |
454 | char *p = buffer + *result; | |
455 | int prefix_len = strlen(prefix); | |
456 | int total_len = prefix_len + name_len + 1; | |
457 | ||
458 | *result += total_len; | |
459 | ||
460 | /* we are just looking for how big our buffer needs to be */ | |
461 | if (!size) | |
462 | return 0; | |
463 | ||
464 | if (*result > size) | |
465 | return -ERANGE; | |
466 | ||
467 | memcpy(p, prefix, prefix_len); | |
468 | memcpy(p + prefix_len, name, name_len); | |
469 | p[prefix_len + name_len] = '\0'; | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
cf1d6c76 TY |
474 | static int ocfs2_xattr_list_entries(struct inode *inode, |
475 | struct ocfs2_xattr_header *header, | |
476 | char *buffer, size_t buffer_size) | |
477 | { | |
936b8834 TM |
478 | size_t result = 0; |
479 | int i, type, ret; | |
480 | const char *prefix, *name; | |
cf1d6c76 TY |
481 | |
482 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
483 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
484 | type = ocfs2_xattr_get_type(entry); |
485 | prefix = ocfs2_xattr_prefix(type); | |
486 | ||
487 | if (prefix) { | |
488 | name = (const char *)header + | |
489 | le16_to_cpu(entry->xe_name_offset); | |
490 | ||
491 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
492 | &result, prefix, name, | |
493 | entry->xe_name_len); | |
494 | if (ret) | |
495 | return ret; | |
cf1d6c76 TY |
496 | } |
497 | } | |
498 | ||
936b8834 | 499 | return result; |
cf1d6c76 TY |
500 | } |
501 | ||
502 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
503 | struct ocfs2_dinode *di, | |
504 | char *buffer, | |
505 | size_t buffer_size) | |
506 | { | |
507 | struct ocfs2_xattr_header *header = NULL; | |
508 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
509 | int ret = 0; | |
510 | ||
511 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
512 | return ret; | |
513 | ||
514 | header = (struct ocfs2_xattr_header *) | |
515 | ((void *)di + inode->i_sb->s_blocksize - | |
516 | le16_to_cpu(di->i_xattr_inline_size)); | |
517 | ||
518 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
519 | ||
520 | return ret; | |
521 | } | |
522 | ||
523 | static int ocfs2_xattr_block_list(struct inode *inode, | |
524 | struct ocfs2_dinode *di, | |
525 | char *buffer, | |
526 | size_t buffer_size) | |
527 | { | |
528 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 529 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
530 | int ret = 0; |
531 | ||
532 | if (!di->i_xattr_loc) | |
533 | return ret; | |
534 | ||
0fcaa56a | 535 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
536 | if (ret < 0) { |
537 | mlog_errno(ret); | |
538 | return ret; | |
539 | } | |
540 | /*Verify the signature of xattr block*/ | |
541 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
542 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
543 | ret = -EFAULT; | |
544 | goto cleanup; | |
545 | } | |
546 | ||
0c044f0b | 547 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
cf1d6c76 | 548 | |
0c044f0b TM |
549 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
550 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
551 | ret = ocfs2_xattr_list_entries(inode, header, | |
552 | buffer, buffer_size); | |
553 | } else { | |
554 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
555 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
556 | buffer, buffer_size); | |
557 | } | |
cf1d6c76 TY |
558 | cleanup: |
559 | brelse(blk_bh); | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
565 | char *buffer, | |
566 | size_t size) | |
567 | { | |
568 | int ret = 0, i_ret = 0, b_ret = 0; | |
569 | struct buffer_head *di_bh = NULL; | |
570 | struct ocfs2_dinode *di = NULL; | |
571 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
572 | ||
8154da3d TY |
573 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
574 | return -EOPNOTSUPP; | |
575 | ||
cf1d6c76 TY |
576 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
577 | return ret; | |
578 | ||
579 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
580 | if (ret < 0) { | |
581 | mlog_errno(ret); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
586 | ||
587 | down_read(&oi->ip_xattr_sem); | |
588 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
589 | if (i_ret < 0) | |
590 | b_ret = 0; | |
591 | else { | |
592 | if (buffer) { | |
593 | buffer += i_ret; | |
594 | size -= i_ret; | |
595 | } | |
596 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
597 | buffer, size); | |
598 | if (b_ret < 0) | |
599 | i_ret = 0; | |
600 | } | |
601 | up_read(&oi->ip_xattr_sem); | |
602 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
603 | ||
604 | brelse(di_bh); | |
605 | ||
606 | return i_ret + b_ret; | |
607 | } | |
608 | ||
609 | static int ocfs2_xattr_find_entry(int name_index, | |
610 | const char *name, | |
611 | struct ocfs2_xattr_search *xs) | |
612 | { | |
613 | struct ocfs2_xattr_entry *entry; | |
614 | size_t name_len; | |
615 | int i, cmp = 1; | |
616 | ||
617 | if (name == NULL) | |
618 | return -EINVAL; | |
619 | ||
620 | name_len = strlen(name); | |
621 | entry = xs->here; | |
622 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
623 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
624 | if (!cmp) | |
625 | cmp = name_len - entry->xe_name_len; | |
626 | if (!cmp) | |
627 | cmp = memcmp(name, (xs->base + | |
628 | le16_to_cpu(entry->xe_name_offset)), | |
629 | name_len); | |
630 | if (cmp == 0) | |
631 | break; | |
632 | entry += 1; | |
633 | } | |
634 | xs->here = entry; | |
635 | ||
636 | return cmp ? -ENODATA : 0; | |
637 | } | |
638 | ||
639 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 640 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
641 | void *buffer, |
642 | size_t len) | |
643 | { | |
644 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
645 | u64 blkno; | |
646 | int i, ret = 0; | |
647 | size_t cplen, blocksize; | |
648 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
649 | struct ocfs2_extent_list *el; |
650 | ||
cf1d6c76 TY |
651 | el = &xv->xr_list; |
652 | clusters = le32_to_cpu(xv->xr_clusters); | |
653 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
654 | blocksize = inode->i_sb->s_blocksize; | |
655 | ||
656 | cpos = 0; | |
657 | while (cpos < clusters) { | |
658 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
659 | &num_clusters, el); | |
660 | if (ret) { | |
661 | mlog_errno(ret); | |
662 | goto out; | |
663 | } | |
664 | ||
665 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
666 | /* Copy ocfs2_xattr_value */ | |
667 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 668 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
669 | if (ret) { |
670 | mlog_errno(ret); | |
671 | goto out; | |
672 | } | |
673 | ||
674 | cplen = len >= blocksize ? blocksize : len; | |
675 | memcpy(buffer, bh->b_data, cplen); | |
676 | len -= cplen; | |
677 | buffer += cplen; | |
678 | ||
679 | brelse(bh); | |
680 | bh = NULL; | |
681 | if (len == 0) | |
682 | break; | |
683 | } | |
684 | cpos += num_clusters; | |
685 | } | |
686 | out: | |
687 | return ret; | |
688 | } | |
689 | ||
690 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
691 | int name_index, | |
692 | const char *name, | |
693 | void *buffer, | |
694 | size_t buffer_size, | |
695 | struct ocfs2_xattr_search *xs) | |
696 | { | |
697 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
698 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 699 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
700 | size_t size; |
701 | int ret = 0; | |
702 | ||
703 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
704 | return -ENODATA; | |
705 | ||
706 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
707 | xs->header = (struct ocfs2_xattr_header *) | |
708 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
709 | xs->base = (void *)xs->header; | |
710 | xs->here = xs->header->xh_entries; | |
711 | ||
712 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
713 | if (ret) | |
714 | return ret; | |
715 | size = le64_to_cpu(xs->here->xe_value_size); | |
716 | if (buffer) { | |
717 | if (size > buffer_size) | |
718 | return -ERANGE; | |
719 | if (ocfs2_xattr_is_local(xs->here)) { | |
720 | memcpy(buffer, (void *)xs->base + | |
721 | le16_to_cpu(xs->here->xe_name_offset) + | |
722 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
723 | } else { | |
589dc260 TM |
724 | xv = (struct ocfs2_xattr_value_root *) |
725 | (xs->base + le16_to_cpu( | |
726 | xs->here->xe_name_offset) + | |
727 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
728 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
729 | buffer, size); |
730 | if (ret < 0) { | |
731 | mlog_errno(ret); | |
732 | return ret; | |
733 | } | |
734 | } | |
735 | } | |
736 | ||
737 | return size; | |
738 | } | |
739 | ||
740 | static int ocfs2_xattr_block_get(struct inode *inode, | |
741 | int name_index, | |
742 | const char *name, | |
743 | void *buffer, | |
744 | size_t buffer_size, | |
745 | struct ocfs2_xattr_search *xs) | |
746 | { | |
747 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
748 | struct buffer_head *blk_bh = NULL; | |
749 | struct ocfs2_xattr_block *xb; | |
589dc260 | 750 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 751 | size_t size; |
589dc260 | 752 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 TY |
753 | |
754 | if (!di->i_xattr_loc) | |
755 | return ret; | |
756 | ||
589dc260 TM |
757 | memset(&xs->bucket, 0, sizeof(xs->bucket)); |
758 | ||
0fcaa56a | 759 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
760 | if (ret < 0) { |
761 | mlog_errno(ret); | |
762 | return ret; | |
763 | } | |
764 | /*Verify the signature of xattr block*/ | |
765 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
766 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
767 | ret = -EFAULT; | |
768 | goto cleanup; | |
769 | } | |
770 | ||
771 | xs->xattr_bh = blk_bh; | |
772 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
cf1d6c76 | 773 | |
589dc260 TM |
774 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
775 | xs->header = &xb->xb_attrs.xb_header; | |
776 | xs->base = (void *)xs->header; | |
777 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
778 | xs->here = xs->header->xh_entries; | |
779 | ||
780 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
781 | } else | |
782 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
783 | name_index, | |
784 | name, xs); | |
785 | ||
cf1d6c76 TY |
786 | if (ret) |
787 | goto cleanup; | |
788 | size = le64_to_cpu(xs->here->xe_value_size); | |
789 | if (buffer) { | |
790 | ret = -ERANGE; | |
791 | if (size > buffer_size) | |
792 | goto cleanup; | |
589dc260 TM |
793 | |
794 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
795 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
796 | i = xs->here - xs->header->xh_entries; | |
797 | ||
798 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
799 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
800 | xs->bucket.xh, | |
801 | i, | |
802 | &block_off, | |
803 | &name_offset); | |
804 | xs->base = xs->bucket.bhs[block_off]->b_data; | |
805 | } | |
cf1d6c76 TY |
806 | if (ocfs2_xattr_is_local(xs->here)) { |
807 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 808 | name_offset + name_len, size); |
cf1d6c76 | 809 | } else { |
589dc260 TM |
810 | xv = (struct ocfs2_xattr_value_root *) |
811 | (xs->base + name_offset + name_len); | |
812 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
813 | buffer, size); |
814 | if (ret < 0) { | |
815 | mlog_errno(ret); | |
816 | goto cleanup; | |
817 | } | |
818 | } | |
819 | } | |
820 | ret = size; | |
821 | cleanup: | |
589dc260 TM |
822 | for (i = 0; i < OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET; i++) |
823 | brelse(xs->bucket.bhs[i]); | |
824 | memset(&xs->bucket, 0, sizeof(xs->bucket)); | |
cf1d6c76 | 825 | |
589dc260 | 826 | brelse(blk_bh); |
cf1d6c76 TY |
827 | return ret; |
828 | } | |
829 | ||
830 | /* ocfs2_xattr_get() | |
831 | * | |
832 | * Copy an extended attribute into the buffer provided. | |
833 | * Buffer is NULL to compute the size of buffer required. | |
834 | */ | |
835 | int ocfs2_xattr_get(struct inode *inode, | |
836 | int name_index, | |
837 | const char *name, | |
838 | void *buffer, | |
839 | size_t buffer_size) | |
840 | { | |
841 | int ret; | |
842 | struct ocfs2_dinode *di = NULL; | |
843 | struct buffer_head *di_bh = NULL; | |
844 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
845 | struct ocfs2_xattr_search xis = { | |
846 | .not_found = -ENODATA, | |
847 | }; | |
848 | struct ocfs2_xattr_search xbs = { | |
849 | .not_found = -ENODATA, | |
850 | }; | |
851 | ||
8154da3d TY |
852 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
853 | return -EOPNOTSUPP; | |
854 | ||
cf1d6c76 TY |
855 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
856 | ret = -ENODATA; | |
857 | ||
858 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
859 | if (ret < 0) { | |
860 | mlog_errno(ret); | |
861 | return ret; | |
862 | } | |
863 | xis.inode_bh = xbs.inode_bh = di_bh; | |
864 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
865 | ||
866 | down_read(&oi->ip_xattr_sem); | |
867 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
868 | buffer_size, &xis); | |
869 | if (ret == -ENODATA) | |
870 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, | |
871 | buffer_size, &xbs); | |
872 | up_read(&oi->ip_xattr_sem); | |
873 | ocfs2_inode_unlock(inode, 0); | |
874 | ||
875 | brelse(di_bh); | |
876 | ||
877 | return ret; | |
878 | } | |
879 | ||
880 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
881 | struct ocfs2_xattr_value_root *xv, | |
882 | const void *value, | |
883 | int value_len) | |
884 | { | |
885 | int ret = 0, i, cp_len, credits; | |
886 | u16 blocksize = inode->i_sb->s_blocksize; | |
887 | u32 p_cluster, num_clusters; | |
888 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
889 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
890 | u64 blkno; | |
891 | struct buffer_head *bh = NULL; | |
892 | handle_t *handle; | |
893 | ||
894 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
895 | ||
896 | credits = clusters * bpc; | |
897 | handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); | |
898 | if (IS_ERR(handle)) { | |
899 | ret = PTR_ERR(handle); | |
900 | mlog_errno(ret); | |
901 | goto out; | |
902 | } | |
903 | ||
904 | while (cpos < clusters) { | |
905 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
906 | &num_clusters, &xv->xr_list); | |
907 | if (ret) { | |
908 | mlog_errno(ret); | |
909 | goto out_commit; | |
910 | } | |
911 | ||
912 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
913 | ||
914 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 915 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
916 | if (ret) { |
917 | mlog_errno(ret); | |
918 | goto out_commit; | |
919 | } | |
920 | ||
921 | ret = ocfs2_journal_access(handle, | |
922 | inode, | |
923 | bh, | |
924 | OCFS2_JOURNAL_ACCESS_WRITE); | |
925 | if (ret < 0) { | |
926 | mlog_errno(ret); | |
927 | goto out_commit; | |
928 | } | |
929 | ||
930 | cp_len = value_len > blocksize ? blocksize : value_len; | |
931 | memcpy(bh->b_data, value, cp_len); | |
932 | value_len -= cp_len; | |
933 | value += cp_len; | |
934 | if (cp_len < blocksize) | |
935 | memset(bh->b_data + cp_len, 0, | |
936 | blocksize - cp_len); | |
937 | ||
938 | ret = ocfs2_journal_dirty(handle, bh); | |
939 | if (ret < 0) { | |
940 | mlog_errno(ret); | |
941 | goto out_commit; | |
942 | } | |
943 | brelse(bh); | |
944 | bh = NULL; | |
945 | ||
946 | /* | |
947 | * XXX: do we need to empty all the following | |
948 | * blocks in this cluster? | |
949 | */ | |
950 | if (!value_len) | |
951 | break; | |
952 | } | |
953 | cpos += num_clusters; | |
954 | } | |
955 | out_commit: | |
956 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
957 | out: | |
958 | brelse(bh); | |
959 | ||
960 | return ret; | |
961 | } | |
962 | ||
963 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
964 | struct ocfs2_xattr_info *xi, | |
965 | struct ocfs2_xattr_search *xs, | |
966 | size_t offs) | |
967 | { | |
968 | handle_t *handle = NULL; | |
969 | int ret = 0; | |
970 | size_t name_len = strlen(xi->name); | |
971 | void *val = xs->base + offs; | |
972 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
973 | ||
974 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
975 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
976 | if (IS_ERR(handle)) { | |
977 | ret = PTR_ERR(handle); | |
978 | mlog_errno(ret); | |
979 | goto out; | |
980 | } | |
981 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
982 | OCFS2_JOURNAL_ACCESS_WRITE); | |
983 | if (ret) { | |
984 | mlog_errno(ret); | |
985 | goto out_commit; | |
986 | } | |
987 | /* Decrease xattr count */ | |
988 | le16_add_cpu(&xs->header->xh_count, -1); | |
989 | /* Remove the xattr entry and tree root which has already be set*/ | |
990 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
991 | memset(val, 0, size); | |
992 | ||
993 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
994 | if (ret < 0) | |
995 | mlog_errno(ret); | |
996 | out_commit: | |
997 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
998 | out: | |
999 | return ret; | |
1000 | } | |
1001 | ||
1002 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
1003 | struct ocfs2_xattr_info *xi, | |
1004 | struct ocfs2_xattr_search *xs, | |
1005 | size_t offs) | |
1006 | { | |
1007 | handle_t *handle = NULL; | |
1008 | int ret = 0; | |
1009 | ||
1010 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1011 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1012 | if (IS_ERR(handle)) { | |
1013 | ret = PTR_ERR(handle); | |
1014 | mlog_errno(ret); | |
1015 | goto out; | |
1016 | } | |
1017 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1018 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1019 | if (ret) { | |
1020 | mlog_errno(ret); | |
1021 | goto out_commit; | |
1022 | } | |
1023 | ||
1024 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1025 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1026 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1027 | ocfs2_xattr_set_local(xs->here, 1); | |
1028 | else | |
1029 | ocfs2_xattr_set_local(xs->here, 0); | |
1030 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1031 | ||
1032 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1033 | if (ret < 0) | |
1034 | mlog_errno(ret); | |
1035 | out_commit: | |
1036 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1037 | out: | |
1038 | return ret; | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * ocfs2_xattr_set_value_outside() | |
1043 | * | |
1044 | * Set large size value in B tree. | |
1045 | */ | |
1046 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1047 | struct ocfs2_xattr_info *xi, | |
1048 | struct ocfs2_xattr_search *xs, | |
1049 | size_t offs) | |
1050 | { | |
1051 | size_t name_len = strlen(xi->name); | |
1052 | void *val = xs->base + offs; | |
1053 | struct ocfs2_xattr_value_root *xv = NULL; | |
1054 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1055 | int ret = 0; | |
1056 | ||
1057 | memset(val, 0, size); | |
1058 | memcpy(val, xi->name, name_len); | |
1059 | xv = (struct ocfs2_xattr_value_root *) | |
1060 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1061 | xv->xr_clusters = 0; | |
1062 | xv->xr_last_eb_blk = 0; | |
1063 | xv->xr_list.l_tree_depth = 0; | |
1064 | xv->xr_list.l_count = cpu_to_le16(1); | |
1065 | xv->xr_list.l_next_free_rec = 0; | |
1066 | ||
1067 | ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
1068 | xi->value_len); | |
1069 | if (ret < 0) { | |
1070 | mlog_errno(ret); | |
1071 | return ret; | |
1072 | } | |
1073 | ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, | |
1074 | xi->value_len); | |
1075 | if (ret < 0) { | |
1076 | mlog_errno(ret); | |
1077 | return ret; | |
1078 | } | |
1079 | ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); | |
1080 | if (ret < 0) | |
1081 | mlog_errno(ret); | |
1082 | ||
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | /* | |
1087 | * ocfs2_xattr_set_entry_local() | |
1088 | * | |
1089 | * Set, replace or remove extended attribute in local. | |
1090 | */ | |
1091 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1092 | struct ocfs2_xattr_info *xi, | |
1093 | struct ocfs2_xattr_search *xs, | |
1094 | struct ocfs2_xattr_entry *last, | |
1095 | size_t min_offs) | |
1096 | { | |
1097 | size_t name_len = strlen(xi->name); | |
1098 | int i; | |
1099 | ||
1100 | if (xi->value && xs->not_found) { | |
1101 | /* Insert the new xattr entry. */ | |
1102 | le16_add_cpu(&xs->header->xh_count, 1); | |
1103 | ocfs2_xattr_set_type(last, xi->name_index); | |
1104 | ocfs2_xattr_set_local(last, 1); | |
1105 | last->xe_name_len = name_len; | |
1106 | } else { | |
1107 | void *first_val; | |
1108 | void *val; | |
1109 | size_t offs, size; | |
1110 | ||
1111 | first_val = xs->base + min_offs; | |
1112 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1113 | val = xs->base + offs; | |
1114 | ||
1115 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1116 | OCFS2_XATTR_INLINE_SIZE) | |
1117 | size = OCFS2_XATTR_SIZE(name_len) + | |
1118 | OCFS2_XATTR_ROOT_SIZE; | |
1119 | else | |
1120 | size = OCFS2_XATTR_SIZE(name_len) + | |
1121 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1122 | ||
1123 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1124 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1125 | /* The old and the new value have the | |
1126 | same size. Just replace the value. */ | |
1127 | ocfs2_xattr_set_local(xs->here, 1); | |
1128 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1129 | /* Clear value bytes. */ | |
1130 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1131 | 0, | |
1132 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1133 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1134 | xi->value, | |
1135 | xi->value_len); | |
1136 | return; | |
1137 | } | |
1138 | /* Remove the old name+value. */ | |
1139 | memmove(first_val + size, first_val, val - first_val); | |
1140 | memset(first_val, 0, size); | |
1141 | xs->here->xe_name_hash = 0; | |
1142 | xs->here->xe_name_offset = 0; | |
1143 | ocfs2_xattr_set_local(xs->here, 1); | |
1144 | xs->here->xe_value_size = 0; | |
1145 | ||
1146 | min_offs += size; | |
1147 | ||
1148 | /* Adjust all value offsets. */ | |
1149 | last = xs->header->xh_entries; | |
1150 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1151 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1152 | ||
1153 | if (o < offs) | |
1154 | last->xe_name_offset = cpu_to_le16(o + size); | |
1155 | last += 1; | |
1156 | } | |
1157 | ||
1158 | if (!xi->value) { | |
1159 | /* Remove the old entry. */ | |
1160 | last -= 1; | |
1161 | memmove(xs->here, xs->here + 1, | |
1162 | (void *)last - (void *)xs->here); | |
1163 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1164 | le16_add_cpu(&xs->header->xh_count, -1); | |
1165 | } | |
1166 | } | |
1167 | if (xi->value) { | |
1168 | /* Insert the new name+value. */ | |
1169 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1170 | OCFS2_XATTR_SIZE(xi->value_len); | |
1171 | void *val = xs->base + min_offs - size; | |
1172 | ||
1173 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1174 | memset(val, 0, size); | |
1175 | memcpy(val, xi->name, name_len); | |
1176 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1177 | xi->value, | |
1178 | xi->value_len); | |
1179 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1180 | ocfs2_xattr_set_local(xs->here, 1); | |
1181 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1182 | } | |
1183 | ||
1184 | return; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * ocfs2_xattr_set_entry() | |
1189 | * | |
1190 | * Set extended attribute entry into inode or block. | |
1191 | * | |
1192 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1193 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1194 | * then set value in B tree with set_value_outside(). | |
1195 | */ | |
1196 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1197 | struct ocfs2_xattr_info *xi, | |
1198 | struct ocfs2_xattr_search *xs, | |
1199 | int flag) | |
1200 | { | |
1201 | struct ocfs2_xattr_entry *last; | |
1202 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1203 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1204 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1205 | size_t size_l = 0; | |
1206 | handle_t *handle = NULL; | |
1207 | int free, i, ret; | |
1208 | struct ocfs2_xattr_info xi_l = { | |
1209 | .name_index = xi->name_index, | |
1210 | .name = xi->name, | |
1211 | .value = xi->value, | |
1212 | .value_len = xi->value_len, | |
1213 | }; | |
1214 | ||
1215 | /* Compute min_offs, last and free space. */ | |
1216 | last = xs->header->xh_entries; | |
1217 | ||
1218 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1219 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1220 | if (offs < min_offs) | |
1221 | min_offs = offs; | |
1222 | last += 1; | |
1223 | } | |
1224 | ||
1225 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1226 | if (free < 0) | |
1227 | return -EFAULT; | |
1228 | ||
1229 | if (!xs->not_found) { | |
1230 | size_t size = 0; | |
1231 | if (ocfs2_xattr_is_local(xs->here)) | |
1232 | size = OCFS2_XATTR_SIZE(name_len) + | |
1233 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1234 | else | |
1235 | size = OCFS2_XATTR_SIZE(name_len) + | |
1236 | OCFS2_XATTR_ROOT_SIZE; | |
1237 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1238 | } | |
1239 | /* Check free space in inode or block */ | |
1240 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1241 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1242 | OCFS2_XATTR_SIZE(name_len) + | |
1243 | OCFS2_XATTR_ROOT_SIZE) { | |
1244 | ret = -ENOSPC; | |
1245 | goto out; | |
1246 | } | |
1247 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1248 | xi_l.value = (void *)&def_xv; | |
1249 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1250 | } else if (xi->value) { | |
1251 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1252 | OCFS2_XATTR_SIZE(name_len) + | |
1253 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1254 | ret = -ENOSPC; | |
1255 | goto out; | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | if (!xs->not_found) { | |
1260 | /* For existing extended attribute */ | |
1261 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1262 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1263 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1264 | void *val = xs->base + offs; | |
1265 | ||
1266 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1267 | /* Replace existing local xattr with tree root */ | |
1268 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
1269 | offs); | |
1270 | if (ret < 0) | |
1271 | mlog_errno(ret); | |
1272 | goto out; | |
1273 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1274 | /* For existing xattr which has value outside */ | |
1275 | struct ocfs2_xattr_value_root *xv = NULL; | |
1276 | xv = (struct ocfs2_xattr_value_root *)(val + | |
1277 | OCFS2_XATTR_SIZE(name_len)); | |
1278 | ||
1279 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1280 | /* | |
1281 | * If new value need set outside also, | |
1282 | * first truncate old value to new value, | |
1283 | * then set new value with set_value_outside(). | |
1284 | */ | |
1285 | ret = ocfs2_xattr_value_truncate(inode, | |
1286 | xs->xattr_bh, | |
1287 | xv, | |
1288 | xi->value_len); | |
1289 | if (ret < 0) { | |
1290 | mlog_errno(ret); | |
1291 | goto out; | |
1292 | } | |
1293 | ||
1294 | ret = __ocfs2_xattr_set_value_outside(inode, | |
1295 | xv, | |
1296 | xi->value, | |
1297 | xi->value_len); | |
1298 | if (ret < 0) { | |
1299 | mlog_errno(ret); | |
1300 | goto out; | |
1301 | } | |
1302 | ||
1303 | ret = ocfs2_xattr_update_entry(inode, | |
1304 | xi, | |
1305 | xs, | |
1306 | offs); | |
1307 | if (ret < 0) | |
1308 | mlog_errno(ret); | |
1309 | goto out; | |
1310 | } else { | |
1311 | /* | |
1312 | * If new value need set in local, | |
1313 | * just trucate old value to zero. | |
1314 | */ | |
1315 | ret = ocfs2_xattr_value_truncate(inode, | |
1316 | xs->xattr_bh, | |
1317 | xv, | |
1318 | 0); | |
1319 | if (ret < 0) | |
1320 | mlog_errno(ret); | |
1321 | } | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1326 | OCFS2_INODE_UPDATE_CREDITS); | |
1327 | if (IS_ERR(handle)) { | |
1328 | ret = PTR_ERR(handle); | |
1329 | mlog_errno(ret); | |
1330 | goto out; | |
1331 | } | |
1332 | ||
1333 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1334 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1335 | if (ret) { | |
1336 | mlog_errno(ret); | |
1337 | goto out_commit; | |
1338 | } | |
1339 | ||
1340 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
28b8ca0b | 1341 | /* set extended attribute in external block. */ |
cf1d6c76 | 1342 | ret = ocfs2_extend_trans(handle, |
28b8ca0b | 1343 | OCFS2_INODE_UPDATE_CREDITS + |
cf1d6c76 TY |
1344 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); |
1345 | if (ret) { | |
1346 | mlog_errno(ret); | |
1347 | goto out_commit; | |
1348 | } | |
1349 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1350 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1351 | if (ret) { | |
1352 | mlog_errno(ret); | |
1353 | goto out_commit; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * Set value in local, include set tree root in local. | |
1359 | * This is the first step for value size >INLINE_SIZE. | |
1360 | */ | |
1361 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1362 | ||
1363 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1364 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1365 | if (ret < 0) { | |
1366 | mlog_errno(ret); | |
1367 | goto out_commit; | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1372 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1373 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1374 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1375 | ||
1376 | /* | |
1377 | * Adjust extent record count or inline data size | |
1378 | * to reserve space for extended attribute. | |
1379 | */ | |
1380 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1381 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1382 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1383 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1384 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1385 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1386 | sizeof(struct ocfs2_extent_rec))); | |
1387 | } | |
1388 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1389 | } | |
1390 | /* Update xattr flag */ | |
1391 | spin_lock(&oi->ip_lock); | |
1392 | oi->ip_dyn_features |= flag; | |
1393 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1394 | spin_unlock(&oi->ip_lock); | |
1395 | /* Update inode ctime */ | |
1396 | inode->i_ctime = CURRENT_TIME; | |
1397 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1398 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1399 | ||
1400 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1401 | if (ret < 0) | |
1402 | mlog_errno(ret); | |
1403 | ||
1404 | out_commit: | |
1405 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1406 | ||
1407 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1408 | /* | |
1409 | * Set value outside in B tree. | |
1410 | * This is the second step for value size > INLINE_SIZE. | |
1411 | */ | |
1412 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1413 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs); | |
1414 | if (ret < 0) { | |
1415 | int ret2; | |
1416 | ||
1417 | mlog_errno(ret); | |
1418 | /* | |
1419 | * If set value outside failed, we have to clean | |
1420 | * the junk tree root we have already set in local. | |
1421 | */ | |
1422 | ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs); | |
1423 | if (ret2 < 0) | |
1424 | mlog_errno(ret2); | |
1425 | } | |
1426 | } | |
1427 | out: | |
1428 | return ret; | |
1429 | ||
1430 | } | |
1431 | ||
cf1d6c76 TY |
1432 | static int ocfs2_remove_value_outside(struct inode*inode, |
1433 | struct buffer_head *bh, | |
1434 | struct ocfs2_xattr_header *header) | |
1435 | { | |
1436 | int ret = 0, i; | |
1437 | ||
1438 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1439 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1440 | ||
1441 | if (!ocfs2_xattr_is_local(entry)) { | |
1442 | struct ocfs2_xattr_value_root *xv; | |
1443 | void *val; | |
1444 | ||
1445 | val = (void *)header + | |
1446 | le16_to_cpu(entry->xe_name_offset); | |
1447 | xv = (struct ocfs2_xattr_value_root *) | |
1448 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1449 | ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0); | |
1450 | if (ret < 0) { | |
1451 | mlog_errno(ret); | |
1452 | return ret; | |
1453 | } | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | return ret; | |
1458 | } | |
1459 | ||
1460 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1461 | struct buffer_head *di_bh) | |
1462 | { | |
1463 | ||
1464 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1465 | struct ocfs2_xattr_header *header; | |
1466 | int ret; | |
1467 | ||
1468 | header = (struct ocfs2_xattr_header *) | |
1469 | ((void *)di + inode->i_sb->s_blocksize - | |
1470 | le16_to_cpu(di->i_xattr_inline_size)); | |
1471 | ||
1472 | ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1473 | ||
1474 | return ret; | |
1475 | } | |
1476 | ||
1477 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1478 | struct buffer_head *blk_bh) | |
1479 | { | |
1480 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 TY |
1481 | int ret = 0; |
1482 | ||
1483 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1484 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1485 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
1486 | ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1487 | } else | |
1488 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1489 | |
1490 | return ret; | |
1491 | } | |
1492 | ||
08413899 TM |
1493 | static int ocfs2_xattr_free_block(struct inode *inode, |
1494 | u64 block) | |
1495 | { | |
1496 | struct inode *xb_alloc_inode; | |
1497 | struct buffer_head *xb_alloc_bh = NULL; | |
1498 | struct buffer_head *blk_bh = NULL; | |
1499 | struct ocfs2_xattr_block *xb; | |
1500 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1501 | handle_t *handle; | |
1502 | int ret = 0; | |
1503 | u64 blk, bg_blkno; | |
1504 | u16 bit; | |
1505 | ||
0fcaa56a | 1506 | ret = ocfs2_read_block(inode, block, &blk_bh); |
08413899 TM |
1507 | if (ret < 0) { |
1508 | mlog_errno(ret); | |
1509 | goto out; | |
1510 | } | |
1511 | ||
1512 | /*Verify the signature of xattr block*/ | |
1513 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
1514 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
1515 | ret = -EFAULT; | |
1516 | goto out; | |
1517 | } | |
1518 | ||
1519 | ret = ocfs2_xattr_block_remove(inode, blk_bh); | |
1520 | if (ret < 0) { | |
1521 | mlog_errno(ret); | |
1522 | goto out; | |
1523 | } | |
1524 | ||
1525 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1526 | blk = le64_to_cpu(xb->xb_blkno); | |
1527 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1528 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1529 | ||
1530 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1531 | EXTENT_ALLOC_SYSTEM_INODE, | |
1532 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1533 | if (!xb_alloc_inode) { | |
1534 | ret = -ENOMEM; | |
1535 | mlog_errno(ret); | |
1536 | goto out; | |
1537 | } | |
1538 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1539 | ||
1540 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1541 | if (ret < 0) { | |
1542 | mlog_errno(ret); | |
1543 | goto out_mutex; | |
1544 | } | |
1545 | ||
1546 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1547 | if (IS_ERR(handle)) { | |
1548 | ret = PTR_ERR(handle); | |
1549 | mlog_errno(ret); | |
1550 | goto out_unlock; | |
1551 | } | |
1552 | ||
1553 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1554 | bit, bg_blkno, 1); | |
1555 | if (ret < 0) | |
1556 | mlog_errno(ret); | |
1557 | ||
1558 | ocfs2_commit_trans(osb, handle); | |
1559 | out_unlock: | |
1560 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1561 | brelse(xb_alloc_bh); | |
1562 | out_mutex: | |
1563 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1564 | iput(xb_alloc_inode); | |
1565 | out: | |
1566 | brelse(blk_bh); | |
1567 | return ret; | |
1568 | } | |
1569 | ||
cf1d6c76 TY |
1570 | /* |
1571 | * ocfs2_xattr_remove() | |
1572 | * | |
1573 | * Free extended attribute resources associated with this inode. | |
1574 | */ | |
1575 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1576 | { | |
cf1d6c76 TY |
1577 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1578 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1579 | handle_t *handle; | |
1580 | int ret; | |
1581 | ||
8154da3d TY |
1582 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1583 | return 0; | |
1584 | ||
cf1d6c76 TY |
1585 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1586 | return 0; | |
1587 | ||
1588 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1589 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1590 | if (ret < 0) { | |
1591 | mlog_errno(ret); | |
1592 | goto out; | |
1593 | } | |
1594 | } | |
cf1d6c76 | 1595 | |
08413899 TM |
1596 | if (di->i_xattr_loc) { |
1597 | ret = ocfs2_xattr_free_block(inode, | |
1598 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1599 | if (ret < 0) { |
1600 | mlog_errno(ret); | |
1601 | goto out; | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1606 | OCFS2_INODE_UPDATE_CREDITS); | |
1607 | if (IS_ERR(handle)) { | |
1608 | ret = PTR_ERR(handle); | |
1609 | mlog_errno(ret); | |
1610 | goto out; | |
1611 | } | |
1612 | ret = ocfs2_journal_access(handle, inode, di_bh, | |
1613 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1614 | if (ret) { | |
1615 | mlog_errno(ret); | |
1616 | goto out_commit; | |
1617 | } | |
1618 | ||
08413899 | 1619 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1620 | |
1621 | spin_lock(&oi->ip_lock); | |
1622 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1623 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1624 | spin_unlock(&oi->ip_lock); | |
1625 | ||
1626 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1627 | if (ret < 0) | |
1628 | mlog_errno(ret); | |
1629 | out_commit: | |
1630 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1631 | out: | |
cf1d6c76 TY |
1632 | return ret; |
1633 | } | |
1634 | ||
1635 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1636 | struct ocfs2_dinode *di) | |
1637 | { | |
1638 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1639 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1640 | int free; | |
1641 | ||
1642 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1643 | return 0; | |
1644 | ||
1645 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1646 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1647 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1648 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1649 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1650 | le64_to_cpu(di->i_size); | |
1651 | } else { | |
1652 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1653 | free = (le16_to_cpu(el->l_count) - | |
1654 | le16_to_cpu(el->l_next_free_rec)) * | |
1655 | sizeof(struct ocfs2_extent_rec); | |
1656 | } | |
1657 | if (free >= xattrsize) | |
1658 | return 1; | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * ocfs2_xattr_ibody_find() | |
1665 | * | |
1666 | * Find extended attribute in inode block and | |
1667 | * fill search info into struct ocfs2_xattr_search. | |
1668 | */ | |
1669 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1670 | int name_index, | |
1671 | const char *name, | |
1672 | struct ocfs2_xattr_search *xs) | |
1673 | { | |
1674 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1675 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1676 | int ret; | |
1677 | int has_space = 0; | |
1678 | ||
1679 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1680 | return 0; | |
1681 | ||
1682 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1683 | down_read(&oi->ip_alloc_sem); | |
1684 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1685 | up_read(&oi->ip_alloc_sem); | |
1686 | if (!has_space) | |
1687 | return 0; | |
1688 | } | |
1689 | ||
1690 | xs->xattr_bh = xs->inode_bh; | |
1691 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1692 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1693 | xs->header = (struct ocfs2_xattr_header *) | |
1694 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1695 | else | |
1696 | xs->header = (struct ocfs2_xattr_header *) | |
1697 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1698 | xs->base = (void *)xs->header; | |
1699 | xs->here = xs->header->xh_entries; | |
1700 | ||
1701 | /* Find the named attribute. */ | |
1702 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1703 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1704 | if (ret && ret != -ENODATA) | |
1705 | return ret; | |
1706 | xs->not_found = ret; | |
1707 | } | |
1708 | ||
1709 | return 0; | |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * ocfs2_xattr_ibody_set() | |
1714 | * | |
1715 | * Set, replace or remove an extended attribute into inode block. | |
1716 | * | |
1717 | */ | |
1718 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
1719 | struct ocfs2_xattr_info *xi, | |
1720 | struct ocfs2_xattr_search *xs) | |
1721 | { | |
1722 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1723 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1724 | int ret; | |
1725 | ||
1726 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1727 | return -ENOSPC; | |
1728 | ||
1729 | down_write(&oi->ip_alloc_sem); | |
1730 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1731 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
1732 | ret = -ENOSPC; | |
1733 | goto out; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | ret = ocfs2_xattr_set_entry(inode, xi, xs, | |
1738 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); | |
1739 | out: | |
1740 | up_write(&oi->ip_alloc_sem); | |
1741 | ||
1742 | return ret; | |
1743 | } | |
1744 | ||
1745 | /* | |
1746 | * ocfs2_xattr_block_find() | |
1747 | * | |
1748 | * Find extended attribute in external block and | |
1749 | * fill search info into struct ocfs2_xattr_search. | |
1750 | */ | |
1751 | static int ocfs2_xattr_block_find(struct inode *inode, | |
1752 | int name_index, | |
1753 | const char *name, | |
1754 | struct ocfs2_xattr_search *xs) | |
1755 | { | |
1756 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1757 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 1758 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1759 | int ret = 0; |
1760 | ||
1761 | if (!di->i_xattr_loc) | |
1762 | return ret; | |
1763 | ||
0fcaa56a | 1764 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
1765 | if (ret < 0) { |
1766 | mlog_errno(ret); | |
1767 | return ret; | |
1768 | } | |
1769 | /*Verify the signature of xattr block*/ | |
1770 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
1771 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
1772 | ret = -EFAULT; | |
1773 | goto cleanup; | |
1774 | } | |
1775 | ||
1776 | xs->xattr_bh = blk_bh; | |
589dc260 TM |
1777 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
1778 | ||
1779 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1780 | xs->header = &xb->xb_attrs.xb_header; | |
1781 | xs->base = (void *)xs->header; | |
1782 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
1783 | xs->here = xs->header->xh_entries; | |
1784 | ||
1785 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1786 | } else | |
1787 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
1788 | name_index, | |
1789 | name, xs); | |
cf1d6c76 | 1790 | |
cf1d6c76 TY |
1791 | if (ret && ret != -ENODATA) { |
1792 | xs->xattr_bh = NULL; | |
1793 | goto cleanup; | |
1794 | } | |
1795 | xs->not_found = ret; | |
1796 | return 0; | |
cf1d6c76 TY |
1797 | cleanup: |
1798 | brelse(blk_bh); | |
1799 | ||
1800 | return ret; | |
1801 | } | |
1802 | ||
01225596 TM |
1803 | /* |
1804 | * When all the xattrs are deleted from index btree, the ocfs2_xattr_tree | |
1805 | * will be erased and ocfs2_xattr_block will have its ocfs2_xattr_header | |
1806 | * re-initialized. | |
1807 | */ | |
1808 | static int ocfs2_restore_xattr_block(struct inode *inode, | |
1809 | struct ocfs2_xattr_search *xs) | |
1810 | { | |
1811 | int ret; | |
1812 | handle_t *handle; | |
1813 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1814 | struct ocfs2_xattr_block *xb = | |
1815 | (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
1816 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
1817 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
1818 | ||
1819 | BUG_ON(!(xb_flags & OCFS2_XATTR_INDEXED) || | |
1820 | le16_to_cpu(el->l_next_free_rec) != 0); | |
1821 | ||
1822 | handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1823 | if (IS_ERR(handle)) { | |
1824 | ret = PTR_ERR(handle); | |
1825 | handle = NULL; | |
1826 | goto out; | |
1827 | } | |
1828 | ||
1829 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1830 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1831 | if (ret < 0) { | |
1832 | mlog_errno(ret); | |
1833 | goto out_commit; | |
1834 | } | |
1835 | ||
1836 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
1837 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
1838 | ||
1839 | xb->xb_flags = cpu_to_le16(xb_flags & ~OCFS2_XATTR_INDEXED); | |
1840 | ||
1841 | ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1842 | ||
1843 | out_commit: | |
1844 | ocfs2_commit_trans(osb, handle); | |
1845 | out: | |
1846 | return ret; | |
1847 | } | |
1848 | ||
cf1d6c76 TY |
1849 | /* |
1850 | * ocfs2_xattr_block_set() | |
1851 | * | |
1852 | * Set, replace or remove an extended attribute into external block. | |
1853 | * | |
1854 | */ | |
1855 | static int ocfs2_xattr_block_set(struct inode *inode, | |
1856 | struct ocfs2_xattr_info *xi, | |
1857 | struct ocfs2_xattr_search *xs) | |
1858 | { | |
1859 | struct buffer_head *new_bh = NULL; | |
1860 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1861 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1862 | struct ocfs2_alloc_context *meta_ac = NULL; | |
1863 | handle_t *handle = NULL; | |
1864 | struct ocfs2_xattr_block *xblk = NULL; | |
1865 | u16 suballoc_bit_start; | |
1866 | u32 num_got; | |
1867 | u64 first_blkno; | |
1868 | int ret; | |
1869 | ||
1870 | if (!xs->xattr_bh) { | |
1871 | /* | |
1872 | * Alloc one external block for extended attribute | |
1873 | * outside of inode. | |
1874 | */ | |
1875 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
1876 | if (ret < 0) { | |
1877 | mlog_errno(ret); | |
1878 | goto out; | |
1879 | } | |
1880 | handle = ocfs2_start_trans(osb, | |
1881 | OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
1882 | if (IS_ERR(handle)) { | |
1883 | ret = PTR_ERR(handle); | |
1884 | mlog_errno(ret); | |
1885 | goto out; | |
1886 | } | |
1887 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1888 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1889 | if (ret < 0) { | |
1890 | mlog_errno(ret); | |
1891 | goto out_commit; | |
1892 | } | |
1893 | ||
1894 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
1895 | &suballoc_bit_start, &num_got, | |
1896 | &first_blkno); | |
1897 | if (ret < 0) { | |
1898 | mlog_errno(ret); | |
1899 | goto out_commit; | |
1900 | } | |
1901 | ||
1902 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
1903 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
1904 | ||
1905 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
1906 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1907 | if (ret < 0) { | |
1908 | mlog_errno(ret); | |
1909 | goto out_commit; | |
1910 | } | |
1911 | ||
1912 | /* Initialize ocfs2_xattr_block */ | |
1913 | xs->xattr_bh = new_bh; | |
1914 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
1915 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
1916 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
1917 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
1918 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
1919 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
1920 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
1921 | ||
1922 | xs->header = &xblk->xb_attrs.xb_header; | |
1923 | xs->base = (void *)xs->header; | |
1924 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
1925 | xs->here = xs->header->xh_entries; | |
1926 | ||
1927 | ||
1928 | ret = ocfs2_journal_dirty(handle, new_bh); | |
1929 | if (ret < 0) { | |
1930 | mlog_errno(ret); | |
1931 | goto out_commit; | |
1932 | } | |
1933 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
1934 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1935 | if (ret < 0) | |
1936 | mlog_errno(ret); | |
1937 | out_commit: | |
1938 | ocfs2_commit_trans(osb, handle); | |
1939 | out: | |
1940 | if (meta_ac) | |
1941 | ocfs2_free_alloc_context(meta_ac); | |
1942 | if (ret < 0) | |
1943 | return ret; | |
01225596 TM |
1944 | } else |
1945 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
1946 | ||
1947 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1948 | /* Set extended attribute into external block */ | |
1949 | ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL); | |
1950 | if (!ret || ret != -ENOSPC) | |
1951 | goto end; | |
1952 | ||
1953 | ret = ocfs2_xattr_create_index_block(inode, xs); | |
1954 | if (ret) | |
1955 | goto end; | |
cf1d6c76 TY |
1956 | } |
1957 | ||
01225596 TM |
1958 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs); |
1959 | if (!ret && xblk->xb_attrs.xb_root.xt_list.l_next_free_rec == 0) | |
1960 | ret = ocfs2_restore_xattr_block(inode, xs); | |
1961 | ||
1962 | end: | |
cf1d6c76 TY |
1963 | |
1964 | return ret; | |
1965 | } | |
1966 | ||
1967 | /* | |
1968 | * ocfs2_xattr_set() | |
1969 | * | |
1970 | * Set, replace or remove an extended attribute for this inode. | |
1971 | * value is NULL to remove an existing extended attribute, else either | |
1972 | * create or replace an extended attribute. | |
1973 | */ | |
1974 | int ocfs2_xattr_set(struct inode *inode, | |
1975 | int name_index, | |
1976 | const char *name, | |
1977 | const void *value, | |
1978 | size_t value_len, | |
1979 | int flags) | |
1980 | { | |
1981 | struct buffer_head *di_bh = NULL; | |
1982 | struct ocfs2_dinode *di; | |
1983 | int ret; | |
01225596 | 1984 | u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
cf1d6c76 TY |
1985 | |
1986 | struct ocfs2_xattr_info xi = { | |
1987 | .name_index = name_index, | |
1988 | .name = name, | |
1989 | .value = value, | |
1990 | .value_len = value_len, | |
1991 | }; | |
1992 | ||
1993 | struct ocfs2_xattr_search xis = { | |
1994 | .not_found = -ENODATA, | |
1995 | }; | |
1996 | ||
1997 | struct ocfs2_xattr_search xbs = { | |
1998 | .not_found = -ENODATA, | |
1999 | }; | |
2000 | ||
8154da3d TY |
2001 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2002 | return -EOPNOTSUPP; | |
2003 | ||
cf1d6c76 TY |
2004 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2005 | if (ret < 0) { | |
2006 | mlog_errno(ret); | |
2007 | return ret; | |
2008 | } | |
2009 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2010 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2011 | ||
2012 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2013 | /* | |
2014 | * Scan inode and external block to find the same name | |
2015 | * extended attribute and collect search infomation. | |
2016 | */ | |
2017 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2018 | if (ret) | |
2019 | goto cleanup; | |
2020 | if (xis.not_found) { | |
2021 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2022 | if (ret) | |
2023 | goto cleanup; | |
2024 | } | |
2025 | ||
2026 | if (xis.not_found && xbs.not_found) { | |
2027 | ret = -ENODATA; | |
2028 | if (flags & XATTR_REPLACE) | |
2029 | goto cleanup; | |
2030 | ret = 0; | |
2031 | if (!value) | |
2032 | goto cleanup; | |
2033 | } else { | |
2034 | ret = -EEXIST; | |
2035 | if (flags & XATTR_CREATE) | |
2036 | goto cleanup; | |
2037 | } | |
2038 | ||
2039 | if (!value) { | |
2040 | /* Remove existing extended attribute */ | |
2041 | if (!xis.not_found) | |
2042 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2043 | else if (!xbs.not_found) | |
2044 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2045 | } else { | |
2046 | /* We always try to set extended attribute into inode first*/ | |
2047 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2048 | if (!ret && !xbs.not_found) { | |
2049 | /* | |
2050 | * If succeed and that extended attribute existing in | |
2051 | * external block, then we will remove it. | |
2052 | */ | |
2053 | xi.value = NULL; | |
2054 | xi.value_len = 0; | |
2055 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2056 | } else if (ret == -ENOSPC) { | |
2057 | if (di->i_xattr_loc && !xbs.xattr_bh) { | |
2058 | ret = ocfs2_xattr_block_find(inode, name_index, | |
2059 | name, &xbs); | |
2060 | if (ret) | |
2061 | goto cleanup; | |
2062 | } | |
2063 | /* | |
2064 | * If no space in inode, we will set extended attribute | |
2065 | * into external block. | |
2066 | */ | |
2067 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2068 | if (ret) | |
2069 | goto cleanup; | |
2070 | if (!xis.not_found) { | |
2071 | /* | |
2072 | * If succeed and that extended attribute | |
2073 | * existing in inode, we will remove it. | |
2074 | */ | |
2075 | xi.value = NULL; | |
2076 | xi.value_len = 0; | |
2077 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2078 | } | |
2079 | } | |
2080 | } | |
2081 | cleanup: | |
2082 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2083 | ocfs2_inode_unlock(inode, 1); | |
2084 | brelse(di_bh); | |
2085 | brelse(xbs.xattr_bh); | |
01225596 TM |
2086 | for (i = 0; i < blk_per_bucket; i++) |
2087 | brelse(xbs.bucket.bhs[i]); | |
cf1d6c76 TY |
2088 | |
2089 | return ret; | |
2090 | } | |
2091 | ||
0c044f0b TM |
2092 | /* |
2093 | * Find the xattr extent rec which may contains name_hash. | |
2094 | * e_cpos will be the first name hash of the xattr rec. | |
2095 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2096 | */ | |
2097 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2098 | u32 name_hash, | |
2099 | u64 *p_blkno, | |
2100 | u32 *e_cpos, | |
2101 | u32 *num_clusters, | |
2102 | struct ocfs2_extent_list *el) | |
2103 | { | |
2104 | int ret = 0, i; | |
2105 | struct buffer_head *eb_bh = NULL; | |
2106 | struct ocfs2_extent_block *eb; | |
2107 | struct ocfs2_extent_rec *rec = NULL; | |
2108 | u64 e_blkno = 0; | |
2109 | ||
2110 | if (el->l_tree_depth) { | |
2111 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2112 | if (ret) { | |
2113 | mlog_errno(ret); | |
2114 | goto out; | |
2115 | } | |
2116 | ||
2117 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2118 | el = &eb->h_list; | |
2119 | ||
2120 | if (el->l_tree_depth) { | |
2121 | ocfs2_error(inode->i_sb, | |
2122 | "Inode %lu has non zero tree depth in " | |
2123 | "xattr tree block %llu\n", inode->i_ino, | |
2124 | (unsigned long long)eb_bh->b_blocknr); | |
2125 | ret = -EROFS; | |
2126 | goto out; | |
2127 | } | |
2128 | } | |
2129 | ||
2130 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2131 | rec = &el->l_recs[i]; | |
2132 | ||
2133 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2134 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2135 | break; | |
2136 | } | |
2137 | } | |
2138 | ||
2139 | if (!e_blkno) { | |
2140 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2141 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2142 | le32_to_cpu(rec->e_cpos), | |
2143 | ocfs2_rec_clusters(el, rec)); | |
2144 | ret = -EROFS; | |
2145 | goto out; | |
2146 | } | |
2147 | ||
2148 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2149 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2150 | if (e_cpos) | |
2151 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2152 | out: | |
2153 | brelse(eb_bh); | |
2154 | return ret; | |
2155 | } | |
2156 | ||
2157 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2158 | struct ocfs2_xattr_bucket *bucket, | |
2159 | void *para); | |
2160 | ||
589dc260 TM |
2161 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
2162 | struct buffer_head *header_bh, | |
2163 | int name_index, | |
2164 | const char *name, | |
2165 | u32 name_hash, | |
2166 | u16 *xe_index, | |
2167 | int *found) | |
2168 | { | |
2169 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
2170 | struct ocfs2_xattr_header *xh = | |
2171 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
2172 | size_t name_len = strlen(name); | |
2173 | struct ocfs2_xattr_entry *xe = NULL; | |
2174 | struct buffer_head *name_bh = NULL; | |
2175 | char *xe_name; | |
2176 | ||
2177 | /* | |
2178 | * We don't use binary search in the bucket because there | |
2179 | * may be multiple entries with the same name hash. | |
2180 | */ | |
2181 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2182 | xe = &xh->xh_entries[i]; | |
2183 | ||
2184 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2185 | continue; | |
2186 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2187 | break; | |
2188 | ||
2189 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2190 | if (!cmp) | |
2191 | cmp = name_len - xe->xe_name_len; | |
2192 | if (cmp) | |
2193 | continue; | |
2194 | ||
2195 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2196 | xh, | |
2197 | i, | |
2198 | &block_off, | |
2199 | &new_offset); | |
2200 | if (ret) { | |
2201 | mlog_errno(ret); | |
2202 | break; | |
2203 | } | |
2204 | ||
0fcaa56a JB |
2205 | ret = ocfs2_read_block(inode, header_bh->b_blocknr + block_off, |
2206 | &name_bh); | |
589dc260 TM |
2207 | if (ret) { |
2208 | mlog_errno(ret); | |
2209 | break; | |
2210 | } | |
2211 | xe_name = name_bh->b_data + new_offset; | |
2212 | ||
2213 | cmp = memcmp(name, xe_name, name_len); | |
2214 | brelse(name_bh); | |
2215 | name_bh = NULL; | |
2216 | ||
2217 | if (cmp == 0) { | |
2218 | *xe_index = i; | |
2219 | *found = 1; | |
2220 | ret = 0; | |
2221 | break; | |
2222 | } | |
2223 | } | |
2224 | ||
2225 | return ret; | |
2226 | } | |
2227 | ||
2228 | /* | |
2229 | * Find the specified xattr entry in a series of buckets. | |
2230 | * This series start from p_blkno and last for num_clusters. | |
2231 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2232 | * the num of the valid buckets. | |
2233 | * | |
2234 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2235 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2236 | */ | |
2237 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2238 | int name_index, | |
2239 | const char *name, | |
2240 | u32 name_hash, | |
2241 | u64 p_blkno, | |
2242 | u32 first_hash, | |
2243 | u32 num_clusters, | |
2244 | struct ocfs2_xattr_search *xs) | |
2245 | { | |
2246 | int ret, found = 0; | |
2247 | struct buffer_head *bh = NULL; | |
2248 | struct buffer_head *lower_bh = NULL; | |
2249 | struct ocfs2_xattr_header *xh = NULL; | |
2250 | struct ocfs2_xattr_entry *xe = NULL; | |
2251 | u16 index = 0; | |
2252 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2253 | int low_bucket = 0, bucket, high_bucket; | |
2254 | u32 last_hash; | |
2255 | u64 blkno; | |
2256 | ||
0fcaa56a | 2257 | ret = ocfs2_read_block(inode, p_blkno, &bh); |
589dc260 TM |
2258 | if (ret) { |
2259 | mlog_errno(ret); | |
2260 | goto out; | |
2261 | } | |
2262 | ||
2263 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
2264 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; | |
2265 | ||
2266 | while (low_bucket <= high_bucket) { | |
2267 | brelse(bh); | |
2268 | bh = NULL; | |
2269 | bucket = (low_bucket + high_bucket) / 2; | |
2270 | ||
2271 | blkno = p_blkno + bucket * blk_per_bucket; | |
2272 | ||
0fcaa56a | 2273 | ret = ocfs2_read_block(inode, blkno, &bh); |
589dc260 TM |
2274 | if (ret) { |
2275 | mlog_errno(ret); | |
2276 | goto out; | |
2277 | } | |
2278 | ||
2279 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
2280 | xe = &xh->xh_entries[0]; | |
2281 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
2282 | high_bucket = bucket - 1; | |
2283 | continue; | |
2284 | } | |
2285 | ||
2286 | /* | |
2287 | * Check whether the hash of the last entry in our | |
5a095611 TM |
2288 | * bucket is larger than the search one. for an empty |
2289 | * bucket, the last one is also the first one. | |
589dc260 | 2290 | */ |
5a095611 TM |
2291 | if (xh->xh_count) |
2292 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
2293 | ||
589dc260 TM |
2294 | last_hash = le32_to_cpu(xe->xe_name_hash); |
2295 | ||
2296 | /* record lower_bh which may be the insert place. */ | |
2297 | brelse(lower_bh); | |
2298 | lower_bh = bh; | |
2299 | bh = NULL; | |
2300 | ||
2301 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
2302 | low_bucket = bucket + 1; | |
2303 | continue; | |
2304 | } | |
2305 | ||
2306 | /* the searched xattr should reside in this bucket if exists. */ | |
2307 | ret = ocfs2_find_xe_in_bucket(inode, lower_bh, | |
2308 | name_index, name, name_hash, | |
2309 | &index, &found); | |
2310 | if (ret) { | |
2311 | mlog_errno(ret); | |
2312 | goto out; | |
2313 | } | |
2314 | break; | |
2315 | } | |
2316 | ||
2317 | /* | |
2318 | * Record the bucket we have found. | |
2319 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
2320 | * always set it to the previous bucket. | |
2321 | */ | |
2322 | if (!lower_bh) { | |
2323 | /* | |
2324 | * We can't find any bucket whose first name_hash is less | |
2325 | * than the find name_hash. | |
2326 | */ | |
2327 | BUG_ON(bh->b_blocknr != p_blkno); | |
2328 | lower_bh = bh; | |
2329 | bh = NULL; | |
2330 | } | |
2331 | xs->bucket.bhs[0] = lower_bh; | |
2332 | xs->bucket.xh = (struct ocfs2_xattr_header *) | |
2333 | xs->bucket.bhs[0]->b_data; | |
2334 | lower_bh = NULL; | |
2335 | ||
2336 | xs->header = xs->bucket.xh; | |
2337 | xs->base = xs->bucket.bhs[0]->b_data; | |
2338 | xs->end = xs->base + inode->i_sb->s_blocksize; | |
2339 | ||
2340 | if (found) { | |
2341 | /* | |
2342 | * If we have found the xattr enty, read all the blocks in | |
2343 | * this bucket. | |
2344 | */ | |
31d33073 | 2345 | ret = ocfs2_read_blocks(inode, xs->bucket.bhs[0]->b_blocknr + 1, |
589dc260 | 2346 | blk_per_bucket - 1, &xs->bucket.bhs[1], |
1efd47f8 | 2347 | 0); |
589dc260 TM |
2348 | if (ret) { |
2349 | mlog_errno(ret); | |
2350 | goto out; | |
2351 | } | |
2352 | ||
2353 | xs->here = &xs->header->xh_entries[index]; | |
2354 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
2355 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr, index); | |
2356 | } else | |
2357 | ret = -ENODATA; | |
2358 | ||
2359 | out: | |
2360 | brelse(bh); | |
2361 | brelse(lower_bh); | |
2362 | return ret; | |
2363 | } | |
2364 | ||
2365 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
2366 | struct buffer_head *root_bh, | |
2367 | int name_index, | |
2368 | const char *name, | |
2369 | struct ocfs2_xattr_search *xs) | |
2370 | { | |
2371 | int ret; | |
2372 | struct ocfs2_xattr_block *xb = | |
2373 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
2374 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
2375 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
2376 | u64 p_blkno = 0; | |
2377 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 2378 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
2379 | |
2380 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2381 | return -ENODATA; | |
2382 | ||
2383 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
2384 | name, name_hash, name_index); | |
2385 | ||
2386 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
2387 | &num_clusters, el); | |
2388 | if (ret) { | |
2389 | mlog_errno(ret); | |
2390 | goto out; | |
2391 | } | |
2392 | ||
2393 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
2394 | ||
2395 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
2396 | "in the rec is %u\n", num_clusters, p_blkno, first_hash); | |
2397 | ||
2398 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
2399 | p_blkno, first_hash, num_clusters, xs); | |
2400 | ||
2401 | out: | |
2402 | return ret; | |
2403 | } | |
2404 | ||
0c044f0b TM |
2405 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
2406 | u64 blkno, | |
2407 | u32 clusters, | |
2408 | xattr_bucket_func *func, | |
2409 | void *para) | |
2410 | { | |
2411 | int i, j, ret = 0; | |
2412 | int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2413 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); | |
2414 | u32 num_buckets = clusters * bpc; | |
2415 | struct ocfs2_xattr_bucket bucket; | |
2416 | ||
2417 | memset(&bucket, 0, sizeof(bucket)); | |
2418 | ||
2419 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
2420 | clusters, blkno); | |
2421 | ||
2422 | for (i = 0; i < num_buckets; i++, blkno += blk_per_bucket) { | |
31d33073 | 2423 | ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket, |
1efd47f8 | 2424 | bucket.bhs, 0); |
0c044f0b TM |
2425 | if (ret) { |
2426 | mlog_errno(ret); | |
2427 | goto out; | |
2428 | } | |
2429 | ||
2430 | bucket.xh = (struct ocfs2_xattr_header *)bucket.bhs[0]->b_data; | |
2431 | /* | |
2432 | * The real bucket num in this series of blocks is stored | |
2433 | * in the 1st bucket. | |
2434 | */ | |
2435 | if (i == 0) | |
2436 | num_buckets = le16_to_cpu(bucket.xh->xh_num_buckets); | |
2437 | ||
5a095611 TM |
2438 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", blkno, |
2439 | le32_to_cpu(bucket.xh->xh_entries[0].xe_name_hash)); | |
0c044f0b TM |
2440 | if (func) { |
2441 | ret = func(inode, &bucket, para); | |
2442 | if (ret) { | |
2443 | mlog_errno(ret); | |
2444 | break; | |
2445 | } | |
2446 | } | |
2447 | ||
2448 | for (j = 0; j < blk_per_bucket; j++) | |
2449 | brelse(bucket.bhs[j]); | |
2450 | memset(&bucket, 0, sizeof(bucket)); | |
2451 | } | |
2452 | ||
2453 | out: | |
2454 | for (j = 0; j < blk_per_bucket; j++) | |
2455 | brelse(bucket.bhs[j]); | |
2456 | ||
2457 | return ret; | |
2458 | } | |
2459 | ||
2460 | struct ocfs2_xattr_tree_list { | |
2461 | char *buffer; | |
2462 | size_t buffer_size; | |
936b8834 | 2463 | size_t result; |
0c044f0b TM |
2464 | }; |
2465 | ||
2466 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
2467 | struct ocfs2_xattr_header *xh, | |
2468 | int index, | |
2469 | int *block_off, | |
2470 | int *new_offset) | |
2471 | { | |
2472 | u16 name_offset; | |
2473 | ||
2474 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
2475 | return -EINVAL; | |
2476 | ||
2477 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
2478 | ||
2479 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
2480 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
2481 | ||
2482 | return 0; | |
2483 | } | |
2484 | ||
2485 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
2486 | struct ocfs2_xattr_bucket *bucket, | |
2487 | void *para) | |
2488 | { | |
936b8834 | 2489 | int ret = 0, type; |
0c044f0b | 2490 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 2491 | int i, block_off, new_offset; |
936b8834 | 2492 | const char *prefix, *name; |
0c044f0b TM |
2493 | |
2494 | for (i = 0 ; i < le16_to_cpu(bucket->xh->xh_count); i++) { | |
2495 | struct ocfs2_xattr_entry *entry = &bucket->xh->xh_entries[i]; | |
936b8834 TM |
2496 | type = ocfs2_xattr_get_type(entry); |
2497 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 2498 | |
936b8834 | 2499 | if (prefix) { |
0c044f0b TM |
2500 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
2501 | bucket->xh, | |
2502 | i, | |
2503 | &block_off, | |
2504 | &new_offset); | |
2505 | if (ret) | |
2506 | break; | |
936b8834 TM |
2507 | |
2508 | name = (const char *)bucket->bhs[block_off]->b_data + | |
2509 | new_offset; | |
2510 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
2511 | xl->buffer_size, | |
2512 | &xl->result, | |
2513 | prefix, name, | |
2514 | entry->xe_name_len); | |
2515 | if (ret) | |
2516 | break; | |
0c044f0b TM |
2517 | } |
2518 | } | |
2519 | ||
2520 | return ret; | |
2521 | } | |
2522 | ||
2523 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
2524 | struct ocfs2_xattr_tree_root *xt, | |
2525 | char *buffer, | |
2526 | size_t buffer_size) | |
2527 | { | |
2528 | struct ocfs2_extent_list *el = &xt->xt_list; | |
2529 | int ret = 0; | |
2530 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
2531 | u64 p_blkno = 0; | |
2532 | struct ocfs2_xattr_tree_list xl = { | |
2533 | .buffer = buffer, | |
2534 | .buffer_size = buffer_size, | |
936b8834 | 2535 | .result = 0, |
0c044f0b TM |
2536 | }; |
2537 | ||
2538 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2539 | return 0; | |
2540 | ||
2541 | while (name_hash > 0) { | |
2542 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
2543 | &e_cpos, &num_clusters, el); | |
2544 | if (ret) { | |
2545 | mlog_errno(ret); | |
2546 | goto out; | |
2547 | } | |
2548 | ||
2549 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
2550 | ocfs2_list_xattr_bucket, | |
2551 | &xl); | |
2552 | if (ret) { | |
2553 | mlog_errno(ret); | |
2554 | goto out; | |
2555 | } | |
2556 | ||
2557 | if (e_cpos == 0) | |
2558 | break; | |
2559 | ||
2560 | name_hash = e_cpos - 1; | |
2561 | } | |
2562 | ||
936b8834 | 2563 | ret = xl.result; |
0c044f0b TM |
2564 | out: |
2565 | return ret; | |
2566 | } | |
01225596 TM |
2567 | |
2568 | static int cmp_xe(const void *a, const void *b) | |
2569 | { | |
2570 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2571 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
2572 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
2573 | ||
2574 | if (l_hash > r_hash) | |
2575 | return 1; | |
2576 | if (l_hash < r_hash) | |
2577 | return -1; | |
2578 | return 0; | |
2579 | } | |
2580 | ||
2581 | static void swap_xe(void *a, void *b, int size) | |
2582 | { | |
2583 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
2584 | ||
2585 | tmp = *l; | |
2586 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
2587 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
2588 | } | |
2589 | ||
2590 | /* | |
2591 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
2592 | * and all the xattr entries will be moved to the new bucket. | |
2593 | * Note: we need to sort the entries since they are not saved in order | |
2594 | * in the ocfs2_xattr_block. | |
2595 | */ | |
2596 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
2597 | struct buffer_head *xb_bh, | |
2598 | struct buffer_head *xh_bh, | |
2599 | struct buffer_head *data_bh) | |
2600 | { | |
2601 | int i, blocksize = inode->i_sb->s_blocksize; | |
2602 | u16 offset, size, off_change; | |
2603 | struct ocfs2_xattr_entry *xe; | |
2604 | struct ocfs2_xattr_block *xb = | |
2605 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2606 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
2607 | struct ocfs2_xattr_header *xh = | |
2608 | (struct ocfs2_xattr_header *)xh_bh->b_data; | |
2609 | u16 count = le16_to_cpu(xb_xh->xh_count); | |
2610 | char *target = xh_bh->b_data, *src = xb_bh->b_data; | |
2611 | ||
2612 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
2613 | (unsigned long long)xb_bh->b_blocknr, | |
2614 | (unsigned long long)xh_bh->b_blocknr); | |
2615 | ||
2616 | memset(xh_bh->b_data, 0, blocksize); | |
2617 | if (data_bh) | |
2618 | memset(data_bh->b_data, 0, blocksize); | |
2619 | /* | |
2620 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
2621 | * there is a offset change corresponding to the change of | |
2622 | * ocfs2_xattr_header's position. | |
2623 | */ | |
2624 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2625 | xe = &xb_xh->xh_entries[count - 1]; | |
2626 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
2627 | size = blocksize - offset; | |
2628 | ||
2629 | /* copy all the names and values. */ | |
2630 | if (data_bh) | |
2631 | target = data_bh->b_data; | |
2632 | memcpy(target + offset, src + offset, size); | |
2633 | ||
2634 | /* Init new header now. */ | |
2635 | xh->xh_count = xb_xh->xh_count; | |
2636 | xh->xh_num_buckets = cpu_to_le16(1); | |
2637 | xh->xh_name_value_len = cpu_to_le16(size); | |
2638 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
2639 | ||
2640 | /* copy all the entries. */ | |
2641 | target = xh_bh->b_data; | |
2642 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); | |
2643 | size = count * sizeof(struct ocfs2_xattr_entry); | |
2644 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
2645 | ||
2646 | /* Change the xe offset for all the xe because of the move. */ | |
2647 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
2648 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2649 | for (i = 0; i < count; i++) | |
2650 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
2651 | ||
2652 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
2653 | offset, size, off_change); | |
2654 | ||
2655 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
2656 | cmp_xe, swap_xe); | |
2657 | } | |
2658 | ||
2659 | /* | |
2660 | * After we move xattr from block to index btree, we have to | |
2661 | * update ocfs2_xattr_search to the new xe and base. | |
2662 | * | |
2663 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
2664 | * While if the entry is in index b-tree, "bucket" indicates the | |
2665 | * real place of the xattr. | |
2666 | */ | |
2667 | static int ocfs2_xattr_update_xattr_search(struct inode *inode, | |
2668 | struct ocfs2_xattr_search *xs, | |
2669 | struct buffer_head *old_bh, | |
2670 | struct buffer_head *new_bh) | |
2671 | { | |
2672 | int ret = 0; | |
2673 | char *buf = old_bh->b_data; | |
2674 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
2675 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
2676 | int i, blocksize = inode->i_sb->s_blocksize; | |
2677 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2678 | ||
2679 | xs->bucket.bhs[0] = new_bh; | |
2680 | get_bh(new_bh); | |
2681 | xs->bucket.xh = (struct ocfs2_xattr_header *)xs->bucket.bhs[0]->b_data; | |
2682 | xs->header = xs->bucket.xh; | |
2683 | ||
2684 | xs->base = new_bh->b_data; | |
2685 | xs->end = xs->base + inode->i_sb->s_blocksize; | |
2686 | ||
2687 | if (!xs->not_found) { | |
2688 | if (OCFS2_XATTR_BUCKET_SIZE != blocksize) { | |
31d33073 | 2689 | ret = ocfs2_read_blocks(inode, |
01225596 TM |
2690 | xs->bucket.bhs[0]->b_blocknr + 1, |
2691 | blk_per_bucket - 1, &xs->bucket.bhs[1], | |
1efd47f8 | 2692 | 0); |
01225596 TM |
2693 | if (ret) { |
2694 | mlog_errno(ret); | |
2695 | return ret; | |
2696 | } | |
2697 | ||
2698 | i = xs->here - old_xh->xh_entries; | |
2699 | xs->here = &xs->header->xh_entries[i]; | |
2700 | } | |
2701 | } | |
2702 | ||
2703 | return ret; | |
2704 | } | |
2705 | ||
2706 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
2707 | struct ocfs2_xattr_search *xs) | |
2708 | { | |
2709 | int ret, credits = OCFS2_SUBALLOC_ALLOC; | |
2710 | u32 bit_off, len; | |
2711 | u64 blkno; | |
2712 | handle_t *handle; | |
2713 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2714 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2715 | struct ocfs2_alloc_context *data_ac; | |
2716 | struct buffer_head *xh_bh = NULL, *data_bh = NULL; | |
2717 | struct buffer_head *xb_bh = xs->xattr_bh; | |
2718 | struct ocfs2_xattr_block *xb = | |
2719 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2720 | struct ocfs2_xattr_tree_root *xr; | |
2721 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
2722 | u16 bpb = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2723 | ||
2724 | mlog(0, "create xattr index block for %llu\n", | |
2725 | (unsigned long long)xb_bh->b_blocknr); | |
2726 | ||
2727 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
2728 | ||
2729 | ret = ocfs2_reserve_clusters(osb, 1, &data_ac); | |
2730 | if (ret) { | |
2731 | mlog_errno(ret); | |
2732 | goto out; | |
2733 | } | |
2734 | ||
2735 | /* | |
2736 | * XXX: | |
2737 | * We can use this lock for now, and maybe move to a dedicated mutex | |
2738 | * if performance becomes a problem later. | |
2739 | */ | |
2740 | down_write(&oi->ip_alloc_sem); | |
2741 | ||
2742 | /* | |
2743 | * 3 more credits, one for xattr block update, one for the 1st block | |
2744 | * of the new xattr bucket and one for the value/data. | |
2745 | */ | |
2746 | credits += 3; | |
2747 | handle = ocfs2_start_trans(osb, credits); | |
2748 | if (IS_ERR(handle)) { | |
2749 | ret = PTR_ERR(handle); | |
2750 | mlog_errno(ret); | |
2751 | goto out_sem; | |
2752 | } | |
2753 | ||
2754 | ret = ocfs2_journal_access(handle, inode, xb_bh, | |
2755 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2756 | if (ret) { | |
2757 | mlog_errno(ret); | |
2758 | goto out_commit; | |
2759 | } | |
2760 | ||
2761 | ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len); | |
2762 | if (ret) { | |
2763 | mlog_errno(ret); | |
2764 | goto out_commit; | |
2765 | } | |
2766 | ||
2767 | /* | |
2768 | * The bucket may spread in many blocks, and | |
2769 | * we will only touch the 1st block and the last block | |
2770 | * in the whole bucket(one for entry and one for data). | |
2771 | */ | |
2772 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
2773 | ||
2774 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", blkno); | |
2775 | ||
2776 | xh_bh = sb_getblk(inode->i_sb, blkno); | |
2777 | if (!xh_bh) { | |
2778 | ret = -EIO; | |
2779 | mlog_errno(ret); | |
2780 | goto out_commit; | |
2781 | } | |
2782 | ||
2783 | ocfs2_set_new_buffer_uptodate(inode, xh_bh); | |
2784 | ||
2785 | ret = ocfs2_journal_access(handle, inode, xh_bh, | |
2786 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2787 | if (ret) { | |
2788 | mlog_errno(ret); | |
2789 | goto out_commit; | |
2790 | } | |
2791 | ||
2792 | if (bpb > 1) { | |
2793 | data_bh = sb_getblk(inode->i_sb, blkno + bpb - 1); | |
2794 | if (!data_bh) { | |
2795 | ret = -EIO; | |
2796 | mlog_errno(ret); | |
2797 | goto out_commit; | |
2798 | } | |
2799 | ||
2800 | ocfs2_set_new_buffer_uptodate(inode, data_bh); | |
2801 | ||
2802 | ret = ocfs2_journal_access(handle, inode, data_bh, | |
2803 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2804 | if (ret) { | |
2805 | mlog_errno(ret); | |
2806 | goto out_commit; | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xh_bh, data_bh); | |
2811 | ||
2812 | ocfs2_journal_dirty(handle, xh_bh); | |
2813 | if (data_bh) | |
2814 | ocfs2_journal_dirty(handle, data_bh); | |
2815 | ||
2816 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh, xh_bh); | |
2817 | ||
2818 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
2819 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
2820 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
2821 | ||
2822 | xr = &xb->xb_attrs.xb_root; | |
2823 | xr->xt_clusters = cpu_to_le32(1); | |
2824 | xr->xt_last_eb_blk = 0; | |
2825 | xr->xt_list.l_tree_depth = 0; | |
2826 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2827 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2828 | ||
2829 | xr->xt_list.l_recs[0].e_cpos = 0; | |
2830 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
2831 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
2832 | ||
2833 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
2834 | ||
2835 | ret = ocfs2_journal_dirty(handle, xb_bh); | |
2836 | if (ret) { | |
2837 | mlog_errno(ret); | |
2838 | goto out_commit; | |
2839 | } | |
2840 | ||
2841 | out_commit: | |
2842 | ocfs2_commit_trans(osb, handle); | |
2843 | ||
2844 | out_sem: | |
2845 | up_write(&oi->ip_alloc_sem); | |
2846 | ||
2847 | out: | |
2848 | if (data_ac) | |
2849 | ocfs2_free_alloc_context(data_ac); | |
2850 | ||
2851 | brelse(xh_bh); | |
2852 | brelse(data_bh); | |
2853 | ||
2854 | return ret; | |
2855 | } | |
2856 | ||
2857 | static int cmp_xe_offset(const void *a, const void *b) | |
2858 | { | |
2859 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2860 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
2861 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
2862 | ||
2863 | if (l_name_offset < r_name_offset) | |
2864 | return 1; | |
2865 | if (l_name_offset > r_name_offset) | |
2866 | return -1; | |
2867 | return 0; | |
2868 | } | |
2869 | ||
2870 | /* | |
2871 | * defrag a xattr bucket if we find that the bucket has some | |
2872 | * holes beteen name/value pairs. | |
2873 | * We will move all the name/value pairs to the end of the bucket | |
2874 | * so that we can spare some space for insertion. | |
2875 | */ | |
2876 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
2877 | struct ocfs2_xattr_bucket *bucket) | |
2878 | { | |
2879 | int ret, i; | |
2880 | size_t end, offset, len, value_len; | |
2881 | struct ocfs2_xattr_header *xh; | |
2882 | char *entries, *buf, *bucket_buf = NULL; | |
2883 | u64 blkno = bucket->bhs[0]->b_blocknr; | |
2884 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2885 | u16 xh_free_start; | |
01225596 TM |
2886 | size_t blocksize = inode->i_sb->s_blocksize; |
2887 | handle_t *handle; | |
2888 | struct buffer_head **bhs; | |
2889 | struct ocfs2_xattr_entry *xe; | |
2890 | ||
2891 | bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
2892 | GFP_NOFS); | |
2893 | if (!bhs) | |
2894 | return -ENOMEM; | |
2895 | ||
1efd47f8 | 2896 | ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket, bhs, 0); |
01225596 TM |
2897 | if (ret) |
2898 | goto out; | |
2899 | ||
2900 | /* | |
2901 | * In order to make the operation more efficient and generic, | |
2902 | * we copy all the blocks into a contiguous memory and do the | |
2903 | * defragment there, so if anything is error, we will not touch | |
2904 | * the real block. | |
2905 | */ | |
2906 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
2907 | if (!bucket_buf) { | |
2908 | ret = -EIO; | |
2909 | goto out; | |
2910 | } | |
2911 | ||
2912 | buf = bucket_buf; | |
2913 | for (i = 0; i < blk_per_bucket; i++, buf += blocksize) | |
2914 | memcpy(buf, bhs[i]->b_data, blocksize); | |
2915 | ||
2916 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), blk_per_bucket); | |
2917 | if (IS_ERR(handle)) { | |
2918 | ret = PTR_ERR(handle); | |
2919 | handle = NULL; | |
2920 | mlog_errno(ret); | |
2921 | goto out; | |
2922 | } | |
2923 | ||
2924 | for (i = 0; i < blk_per_bucket; i++) { | |
2925 | ret = ocfs2_journal_access(handle, inode, bhs[i], | |
2926 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2927 | if (ret < 0) { | |
2928 | mlog_errno(ret); | |
2929 | goto commit; | |
2930 | } | |
2931 | } | |
2932 | ||
2933 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
2934 | entries = (char *)xh->xh_entries; | |
2935 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
2936 | ||
2937 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
2938 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
2939 | blkno, le16_to_cpu(xh->xh_count), xh_free_start, | |
2940 | le16_to_cpu(xh->xh_name_value_len)); | |
2941 | ||
2942 | /* | |
2943 | * sort all the entries by their offset. | |
2944 | * the largest will be the first, so that we can | |
2945 | * move them to the end one by one. | |
2946 | */ | |
2947 | sort(entries, le16_to_cpu(xh->xh_count), | |
2948 | sizeof(struct ocfs2_xattr_entry), | |
2949 | cmp_xe_offset, swap_xe); | |
2950 | ||
2951 | /* Move all name/values to the end of the bucket. */ | |
2952 | xe = xh->xh_entries; | |
2953 | end = OCFS2_XATTR_BUCKET_SIZE; | |
2954 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
2955 | offset = le16_to_cpu(xe->xe_name_offset); | |
2956 | if (ocfs2_xattr_is_local(xe)) | |
2957 | value_len = OCFS2_XATTR_SIZE( | |
2958 | le64_to_cpu(xe->xe_value_size)); | |
2959 | else | |
2960 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
2961 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
2962 | ||
2963 | /* | |
2964 | * We must make sure that the name/value pair | |
2965 | * exist in the same block. So adjust end to | |
2966 | * the previous block end if needed. | |
2967 | */ | |
2968 | if (((end - len) / blocksize != | |
2969 | (end - 1) / blocksize)) | |
2970 | end = end - end % blocksize; | |
2971 | ||
2972 | if (end > offset + len) { | |
2973 | memmove(bucket_buf + end - len, | |
2974 | bucket_buf + offset, len); | |
2975 | xe->xe_name_offset = cpu_to_le16(end - len); | |
2976 | } | |
2977 | ||
2978 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
2979 | "bucket %llu\n", (unsigned long long)blkno); | |
2980 | ||
2981 | end -= len; | |
2982 | } | |
2983 | ||
2984 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
2985 | "bucket %llu\n", (unsigned long long)blkno); | |
2986 | ||
2987 | if (xh_free_start == end) | |
2988 | goto commit; | |
2989 | ||
2990 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
2991 | xh->xh_free_start = cpu_to_le16(end); | |
2992 | ||
2993 | /* sort the entries by their name_hash. */ | |
2994 | sort(entries, le16_to_cpu(xh->xh_count), | |
2995 | sizeof(struct ocfs2_xattr_entry), | |
2996 | cmp_xe, swap_xe); | |
2997 | ||
2998 | buf = bucket_buf; | |
2999 | for (i = 0; i < blk_per_bucket; i++, buf += blocksize) { | |
3000 | memcpy(bhs[i]->b_data, buf, blocksize); | |
3001 | ocfs2_journal_dirty(handle, bhs[i]); | |
3002 | } | |
3003 | ||
3004 | commit: | |
3005 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
3006 | out: | |
3007 | ||
3008 | if (bhs) { | |
3009 | for (i = 0; i < blk_per_bucket; i++) | |
3010 | brelse(bhs[i]); | |
3011 | } | |
3012 | kfree(bhs); | |
3013 | ||
3014 | kfree(bucket_buf); | |
3015 | return ret; | |
3016 | } | |
3017 | ||
3018 | /* | |
3019 | * Move half nums of the xattr bucket in the previous cluster to this new | |
3020 | * cluster. We only touch the last cluster of the previous extend record. | |
3021 | * | |
3022 | * first_bh is the first buffer_head of a series of bucket in the same | |
3023 | * extent rec and header_bh is the header of one bucket in this cluster. | |
3024 | * They will be updated if we move the data header_bh contains to the new | |
3025 | * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. | |
3026 | */ | |
3027 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3028 | handle_t *handle, | |
3029 | struct buffer_head **first_bh, | |
3030 | struct buffer_head **header_bh, | |
3031 | u64 new_blkno, | |
3032 | u64 prev_blkno, | |
3033 | u32 num_clusters, | |
3034 | u32 *first_hash) | |
3035 | { | |
3036 | int i, ret, credits; | |
3037 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3038 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3039 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3040 | int blocksize = inode->i_sb->s_blocksize; | |
3041 | struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; | |
3042 | struct ocfs2_xattr_header *new_xh; | |
3043 | struct ocfs2_xattr_header *xh = | |
3044 | (struct ocfs2_xattr_header *)((*first_bh)->b_data); | |
3045 | ||
3046 | BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); | |
3047 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); | |
3048 | ||
3049 | prev_bh = *first_bh; | |
3050 | get_bh(prev_bh); | |
3051 | xh = (struct ocfs2_xattr_header *)prev_bh->b_data; | |
3052 | ||
3053 | prev_blkno += (num_clusters - 1) * bpc + bpc / 2; | |
3054 | ||
3055 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", | |
3056 | prev_blkno, new_blkno); | |
3057 | ||
3058 | /* | |
3059 | * We need to update the 1st half of the new cluster and | |
3060 | * 1 more for the update of the 1st bucket of the previous | |
3061 | * extent record. | |
3062 | */ | |
3063 | credits = bpc / 2 + 1; | |
3064 | ret = ocfs2_extend_trans(handle, credits); | |
3065 | if (ret) { | |
3066 | mlog_errno(ret); | |
3067 | goto out; | |
3068 | } | |
3069 | ||
3070 | ret = ocfs2_journal_access(handle, inode, prev_bh, | |
3071 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3072 | if (ret) { | |
3073 | mlog_errno(ret); | |
3074 | goto out; | |
3075 | } | |
3076 | ||
3077 | for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { | |
3078 | old_bh = new_bh = NULL; | |
3079 | new_bh = sb_getblk(inode->i_sb, new_blkno); | |
3080 | if (!new_bh) { | |
3081 | ret = -EIO; | |
3082 | mlog_errno(ret); | |
3083 | goto out; | |
3084 | } | |
3085 | ||
3086 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
3087 | ||
3088 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
3089 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3090 | if (ret < 0) { | |
3091 | mlog_errno(ret); | |
3092 | brelse(new_bh); | |
3093 | goto out; | |
3094 | } | |
3095 | ||
0fcaa56a | 3096 | ret = ocfs2_read_block(inode, prev_blkno, &old_bh); |
01225596 TM |
3097 | if (ret < 0) { |
3098 | mlog_errno(ret); | |
3099 | brelse(new_bh); | |
3100 | goto out; | |
3101 | } | |
3102 | ||
3103 | memcpy(new_bh->b_data, old_bh->b_data, blocksize); | |
3104 | ||
3105 | if (i == 0) { | |
3106 | new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; | |
3107 | new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); | |
3108 | ||
3109 | if (first_hash) | |
3110 | *first_hash = le32_to_cpu( | |
3111 | new_xh->xh_entries[0].xe_name_hash); | |
3112 | new_first_bh = new_bh; | |
3113 | get_bh(new_first_bh); | |
3114 | } | |
3115 | ||
3116 | ocfs2_journal_dirty(handle, new_bh); | |
3117 | ||
3118 | if (*header_bh == old_bh) { | |
3119 | brelse(*header_bh); | |
3120 | *header_bh = new_bh; | |
3121 | get_bh(*header_bh); | |
3122 | ||
3123 | brelse(*first_bh); | |
3124 | *first_bh = new_first_bh; | |
3125 | get_bh(*first_bh); | |
3126 | } | |
3127 | brelse(new_bh); | |
3128 | brelse(old_bh); | |
3129 | } | |
3130 | ||
3131 | le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); | |
3132 | ||
3133 | ocfs2_journal_dirty(handle, prev_bh); | |
3134 | out: | |
3135 | brelse(prev_bh); | |
3136 | brelse(new_first_bh); | |
3137 | return ret; | |
3138 | } | |
3139 | ||
3140 | static int ocfs2_read_xattr_bucket(struct inode *inode, | |
3141 | u64 blkno, | |
3142 | struct buffer_head **bhs, | |
3143 | int new) | |
3144 | { | |
3145 | int ret = 0; | |
3146 | u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3147 | ||
3148 | if (!new) | |
31d33073 | 3149 | return ocfs2_read_blocks(inode, blkno, |
1efd47f8 | 3150 | blk_per_bucket, bhs, 0); |
01225596 TM |
3151 | |
3152 | for (i = 0; i < blk_per_bucket; i++) { | |
3153 | bhs[i] = sb_getblk(inode->i_sb, blkno + i); | |
3154 | if (bhs[i] == NULL) { | |
3155 | ret = -EIO; | |
3156 | mlog_errno(ret); | |
3157 | break; | |
3158 | } | |
3159 | ocfs2_set_new_buffer_uptodate(inode, bhs[i]); | |
3160 | } | |
3161 | ||
3162 | return ret; | |
3163 | } | |
3164 | ||
3165 | /* | |
3166 | * Move half num of the xattrs in old bucket(blk) to new bucket(new_blk). | |
3167 | * first_hash will record the 1st hash of the new bucket. | |
3168 | */ | |
3169 | static int ocfs2_half_xattr_bucket(struct inode *inode, | |
3170 | handle_t *handle, | |
3171 | u64 blk, | |
3172 | u64 new_blk, | |
3173 | u32 *first_hash, | |
3174 | int new_bucket_head) | |
3175 | { | |
3176 | int ret, i; | |
3177 | u16 count, start, len, name_value_len, xe_len, name_offset; | |
3178 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3179 | struct buffer_head **s_bhs, **t_bhs = NULL; | |
3180 | struct ocfs2_xattr_header *xh; | |
3181 | struct ocfs2_xattr_entry *xe; | |
3182 | int blocksize = inode->i_sb->s_blocksize; | |
3183 | ||
3184 | mlog(0, "move half of xattrs from bucket %llu to %llu\n", | |
3185 | blk, new_blk); | |
3186 | ||
3187 | s_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); | |
3188 | if (!s_bhs) | |
3189 | return -ENOMEM; | |
3190 | ||
3191 | ret = ocfs2_read_xattr_bucket(inode, blk, s_bhs, 0); | |
3192 | if (ret) { | |
3193 | mlog_errno(ret); | |
3194 | goto out; | |
3195 | } | |
3196 | ||
3197 | ret = ocfs2_journal_access(handle, inode, s_bhs[0], | |
3198 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3199 | if (ret) { | |
3200 | mlog_errno(ret); | |
3201 | goto out; | |
3202 | } | |
3203 | ||
3204 | t_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); | |
3205 | if (!t_bhs) { | |
3206 | ret = -ENOMEM; | |
3207 | goto out; | |
3208 | } | |
3209 | ||
3210 | ret = ocfs2_read_xattr_bucket(inode, new_blk, t_bhs, new_bucket_head); | |
3211 | if (ret) { | |
3212 | mlog_errno(ret); | |
3213 | goto out; | |
3214 | } | |
3215 | ||
3216 | for (i = 0; i < blk_per_bucket; i++) { | |
3217 | ret = ocfs2_journal_access(handle, inode, t_bhs[i], | |
3218 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3219 | if (ret) { | |
3220 | mlog_errno(ret); | |
3221 | goto out; | |
3222 | } | |
3223 | } | |
3224 | ||
3225 | /* copy the whole bucket to the new first. */ | |
3226 | for (i = 0; i < blk_per_bucket; i++) | |
3227 | memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); | |
3228 | ||
3229 | /* update the new bucket. */ | |
3230 | xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data; | |
3231 | count = le16_to_cpu(xh->xh_count); | |
3232 | start = count / 2; | |
3233 | ||
3234 | /* | |
3235 | * Calculate the total name/value len and xh_free_start for | |
3236 | * the old bucket first. | |
3237 | */ | |
3238 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3239 | name_value_len = 0; | |
3240 | for (i = 0; i < start; i++) { | |
3241 | xe = &xh->xh_entries[i]; | |
3242 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3243 | if (ocfs2_xattr_is_local(xe)) | |
3244 | xe_len += | |
3245 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3246 | else | |
3247 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3248 | name_value_len += xe_len; | |
3249 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3250 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3251 | } | |
3252 | ||
3253 | /* | |
3254 | * Now begin the modification to the new bucket. | |
3255 | * | |
3256 | * In the new bucket, We just move the xattr entry to the beginning | |
3257 | * and don't touch the name/value. So there will be some holes in the | |
3258 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3259 | * called. | |
3260 | */ | |
3261 | xe = &xh->xh_entries[start]; | |
3262 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3263 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3264 | (int)((char *)xe - (char *)xh), |
3265 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3266 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3267 | xe = &xh->xh_entries[count - start]; | |
3268 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3269 | memset((char *)xe, 0, len); | |
3270 | ||
3271 | le16_add_cpu(&xh->xh_count, -start); | |
3272 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3273 | ||
3274 | /* Calculate xh_free_start for the new bucket. */ | |
3275 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3276 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3277 | xe = &xh->xh_entries[i]; | |
3278 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3279 | if (ocfs2_xattr_is_local(xe)) | |
3280 | xe_len += | |
3281 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3282 | else | |
3283 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3284 | if (le16_to_cpu(xe->xe_name_offset) < | |
3285 | le16_to_cpu(xh->xh_free_start)) | |
3286 | xh->xh_free_start = xe->xe_name_offset; | |
3287 | } | |
3288 | ||
3289 | /* set xh->xh_num_buckets for the new xh. */ | |
3290 | if (new_bucket_head) | |
3291 | xh->xh_num_buckets = cpu_to_le16(1); | |
3292 | else | |
3293 | xh->xh_num_buckets = 0; | |
3294 | ||
3295 | for (i = 0; i < blk_per_bucket; i++) { | |
3296 | ocfs2_journal_dirty(handle, t_bhs[i]); | |
3297 | if (ret) | |
3298 | mlog_errno(ret); | |
3299 | } | |
3300 | ||
3301 | /* store the first_hash of the new bucket. */ | |
3302 | if (first_hash) | |
3303 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3304 | ||
3305 | /* | |
3306 | * Now only update the 1st block of the old bucket. | |
3307 | * Please note that the entry has been sorted already above. | |
3308 | */ | |
3309 | xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data; | |
3310 | memset(&xh->xh_entries[start], 0, | |
3311 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3312 | xh->xh_count = cpu_to_le16(start); | |
3313 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3314 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3315 | ||
3316 | ocfs2_journal_dirty(handle, s_bhs[0]); | |
3317 | if (ret) | |
3318 | mlog_errno(ret); | |
3319 | ||
3320 | out: | |
3321 | if (s_bhs) { | |
3322 | for (i = 0; i < blk_per_bucket; i++) | |
3323 | brelse(s_bhs[i]); | |
3324 | } | |
3325 | kfree(s_bhs); | |
3326 | ||
3327 | if (t_bhs) { | |
3328 | for (i = 0; i < blk_per_bucket; i++) | |
3329 | brelse(t_bhs[i]); | |
3330 | } | |
3331 | kfree(t_bhs); | |
3332 | ||
3333 | return ret; | |
3334 | } | |
3335 | ||
3336 | /* | |
3337 | * Copy xattr from one bucket to another bucket. | |
3338 | * | |
3339 | * The caller must make sure that the journal transaction | |
3340 | * has enough space for journaling. | |
3341 | */ | |
3342 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3343 | handle_t *handle, | |
3344 | u64 s_blkno, | |
3345 | u64 t_blkno, | |
3346 | int t_is_new) | |
3347 | { | |
3348 | int ret, i; | |
3349 | int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3350 | int blocksize = inode->i_sb->s_blocksize; | |
3351 | struct buffer_head **s_bhs, **t_bhs = NULL; | |
3352 | ||
3353 | BUG_ON(s_blkno == t_blkno); | |
3354 | ||
3355 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
3356 | s_blkno, t_blkno, t_is_new); | |
3357 | ||
3358 | s_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
3359 | GFP_NOFS); | |
3360 | if (!s_bhs) | |
3361 | return -ENOMEM; | |
3362 | ||
3363 | ret = ocfs2_read_xattr_bucket(inode, s_blkno, s_bhs, 0); | |
3364 | if (ret) | |
3365 | goto out; | |
3366 | ||
3367 | t_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
3368 | GFP_NOFS); | |
3369 | if (!t_bhs) { | |
3370 | ret = -ENOMEM; | |
3371 | goto out; | |
3372 | } | |
3373 | ||
3374 | ret = ocfs2_read_xattr_bucket(inode, t_blkno, t_bhs, t_is_new); | |
3375 | if (ret) | |
3376 | goto out; | |
3377 | ||
3378 | for (i = 0; i < blk_per_bucket; i++) { | |
3379 | ret = ocfs2_journal_access(handle, inode, t_bhs[i], | |
3380 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3381 | if (ret) | |
3382 | goto out; | |
3383 | } | |
3384 | ||
3385 | for (i = 0; i < blk_per_bucket; i++) { | |
3386 | memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); | |
3387 | ocfs2_journal_dirty(handle, t_bhs[i]); | |
3388 | } | |
3389 | ||
3390 | out: | |
3391 | if (s_bhs) { | |
3392 | for (i = 0; i < blk_per_bucket; i++) | |
3393 | brelse(s_bhs[i]); | |
3394 | } | |
3395 | kfree(s_bhs); | |
3396 | ||
3397 | if (t_bhs) { | |
3398 | for (i = 0; i < blk_per_bucket; i++) | |
3399 | brelse(t_bhs[i]); | |
3400 | } | |
3401 | kfree(t_bhs); | |
3402 | ||
3403 | return ret; | |
3404 | } | |
3405 | ||
3406 | /* | |
3407 | * Copy one xattr cluster from src_blk to to_blk. | |
3408 | * The to_blk will become the first bucket header of the cluster, so its | |
3409 | * xh_num_buckets will be initialized as the bucket num in the cluster. | |
3410 | */ | |
3411 | static int ocfs2_cp_xattr_cluster(struct inode *inode, | |
3412 | handle_t *handle, | |
3413 | struct buffer_head *first_bh, | |
3414 | u64 src_blk, | |
3415 | u64 to_blk, | |
3416 | u32 *first_hash) | |
3417 | { | |
3418 | int i, ret, credits; | |
3419 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3420 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3421 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3422 | struct buffer_head *bh = NULL; | |
3423 | struct ocfs2_xattr_header *xh; | |
3424 | u64 to_blk_start = to_blk; | |
3425 | ||
3426 | mlog(0, "cp xattrs from cluster %llu to %llu\n", src_blk, to_blk); | |
3427 | ||
3428 | /* | |
3429 | * We need to update the new cluster and 1 more for the update of | |
3430 | * the 1st bucket of the previous extent rec. | |
3431 | */ | |
3432 | credits = bpc + 1; | |
3433 | ret = ocfs2_extend_trans(handle, credits); | |
3434 | if (ret) { | |
3435 | mlog_errno(ret); | |
3436 | goto out; | |
3437 | } | |
3438 | ||
3439 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3440 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3441 | if (ret) { | |
3442 | mlog_errno(ret); | |
3443 | goto out; | |
3444 | } | |
3445 | ||
3446 | for (i = 0; i < num_buckets; i++) { | |
3447 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
3448 | src_blk, to_blk, 1); | |
3449 | if (ret) { | |
3450 | mlog_errno(ret); | |
3451 | goto out; | |
3452 | } | |
3453 | ||
3454 | src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3455 | to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3456 | } | |
3457 | ||
3458 | /* update the old bucket header. */ | |
3459 | xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3460 | le16_add_cpu(&xh->xh_num_buckets, -num_buckets); | |
3461 | ||
3462 | ocfs2_journal_dirty(handle, first_bh); | |
3463 | ||
3464 | /* update the new bucket header. */ | |
0fcaa56a | 3465 | ret = ocfs2_read_block(inode, to_blk_start, &bh); |
01225596 TM |
3466 | if (ret < 0) { |
3467 | mlog_errno(ret); | |
3468 | goto out; | |
3469 | } | |
3470 | ||
3471 | ret = ocfs2_journal_access(handle, inode, bh, | |
3472 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3473 | if (ret) { | |
3474 | mlog_errno(ret); | |
3475 | goto out; | |
3476 | } | |
3477 | ||
3478 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
3479 | xh->xh_num_buckets = cpu_to_le16(num_buckets); | |
3480 | ||
3481 | ocfs2_journal_dirty(handle, bh); | |
3482 | ||
3483 | if (first_hash) | |
3484 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3485 | out: | |
3486 | brelse(bh); | |
3487 | return ret; | |
3488 | } | |
3489 | ||
3490 | /* | |
3491 | * Move half of the xattrs in this cluster to the new cluster. | |
3492 | * This function should only be called when bucket size == cluster size. | |
3493 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
3494 | */ | |
3495 | static int ocfs2_half_xattr_cluster(struct inode *inode, | |
3496 | handle_t *handle, | |
3497 | u64 prev_blk, | |
3498 | u64 new_blk, | |
3499 | u32 *first_hash) | |
3500 | { | |
3501 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3502 | int ret, credits = 2 * blk_per_bucket; | |
3503 | ||
3504 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
3505 | ||
3506 | ret = ocfs2_extend_trans(handle, credits); | |
3507 | if (ret) { | |
3508 | mlog_errno(ret); | |
3509 | return ret; | |
3510 | } | |
3511 | ||
3512 | /* Move half of the xattr in start_blk to the next bucket. */ | |
3513 | return ocfs2_half_xattr_bucket(inode, handle, prev_blk, | |
3514 | new_blk, first_hash, 1); | |
3515 | } | |
3516 | ||
3517 | /* | |
3518 | * Move some xattrs from the old cluster to the new one since they are not | |
3519 | * contiguous in ocfs2 xattr tree. | |
3520 | * | |
3521 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
3522 | * prev_blk to it. v_start will be set as the first name hash value in this | |
3523 | * new cluster so that it can be used as e_cpos during tree insertion and | |
3524 | * don't collide with our original b-tree operations. first_bh and header_bh | |
3525 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
3526 | * to extend the insert bucket. | |
3527 | * | |
3528 | * The problem is how much xattr should we move to the new one and when should | |
3529 | * we update first_bh and header_bh? | |
3530 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
3531 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
3532 | * update the first_bh and header_bh if the insert bucket has been moved | |
3533 | * to the new cluster. | |
3534 | * 2. If cluster_size == bucket_size: | |
3535 | * a) If the previous extent rec has more than one cluster and the insert | |
3536 | * place isn't in the last cluster, copy the entire last cluster to the | |
3537 | * new one. This time, we don't need to upate the first_bh and header_bh | |
3538 | * since they will not be moved into the new cluster. | |
3539 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
3540 | * the new one. And we set the extend flag to zero if the insert place is | |
3541 | * moved into the new allocated cluster since no extend is needed. | |
3542 | */ | |
3543 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
3544 | handle_t *handle, | |
3545 | struct buffer_head **first_bh, | |
3546 | struct buffer_head **header_bh, | |
3547 | u64 new_blk, | |
3548 | u64 prev_blk, | |
3549 | u32 prev_clusters, | |
3550 | u32 *v_start, | |
3551 | int *extend) | |
3552 | { | |
3553 | int ret = 0; | |
3554 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3555 | ||
3556 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
3557 | prev_blk, prev_clusters, new_blk); | |
3558 | ||
3559 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) | |
3560 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, | |
3561 | handle, | |
3562 | first_bh, | |
3563 | header_bh, | |
3564 | new_blk, | |
3565 | prev_blk, | |
3566 | prev_clusters, | |
3567 | v_start); | |
3568 | else { | |
3569 | u64 last_blk = prev_blk + bpc * (prev_clusters - 1); | |
3570 | ||
3571 | if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) | |
3572 | ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, | |
3573 | last_blk, new_blk, | |
3574 | v_start); | |
3575 | else { | |
3576 | ret = ocfs2_half_xattr_cluster(inode, handle, | |
3577 | last_blk, new_blk, | |
3578 | v_start); | |
3579 | ||
3580 | if ((*header_bh)->b_blocknr == last_blk && extend) | |
3581 | *extend = 0; | |
3582 | } | |
3583 | } | |
3584 | ||
3585 | return ret; | |
3586 | } | |
3587 | ||
3588 | /* | |
3589 | * Add a new cluster for xattr storage. | |
3590 | * | |
3591 | * If the new cluster is contiguous with the previous one, it will be | |
3592 | * appended to the same extent record, and num_clusters will be updated. | |
3593 | * If not, we will insert a new extent for it and move some xattrs in | |
3594 | * the last cluster into the new allocated one. | |
3595 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
3596 | * lose the benefits of hashing because we'll have to search large leaves. | |
3597 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
3598 | * if it's bigger). | |
3599 | * | |
3600 | * first_bh is the first block of the previous extent rec and header_bh | |
3601 | * indicates the bucket we will insert the new xattrs. They will be updated | |
3602 | * when the header_bh is moved into the new cluster. | |
3603 | */ | |
3604 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
3605 | struct buffer_head *root_bh, | |
3606 | struct buffer_head **first_bh, | |
3607 | struct buffer_head **header_bh, | |
3608 | u32 *num_clusters, | |
3609 | u32 prev_cpos, | |
3610 | u64 prev_blkno, | |
3611 | int *extend) | |
3612 | { | |
3613 | int ret, credits; | |
3614 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3615 | u32 prev_clusters = *num_clusters; | |
3616 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
3617 | u64 block; | |
3618 | handle_t *handle = NULL; | |
3619 | struct ocfs2_alloc_context *data_ac = NULL; | |
3620 | struct ocfs2_alloc_context *meta_ac = NULL; | |
3621 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 3622 | struct ocfs2_extent_tree et; |
01225596 TM |
3623 | |
3624 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
3625 | "previous xattr blkno = %llu\n", | |
3626 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
3627 | prev_cpos, prev_blkno); | |
3628 | ||
8d6220d6 | 3629 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c JB |
3630 | |
3631 | ret = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, | |
3632 | &data_ac, &meta_ac); | |
01225596 TM |
3633 | if (ret) { |
3634 | mlog_errno(ret); | |
3635 | goto leave; | |
3636 | } | |
3637 | ||
f99b9b7c JB |
3638 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
3639 | clusters_to_add); | |
01225596 TM |
3640 | handle = ocfs2_start_trans(osb, credits); |
3641 | if (IS_ERR(handle)) { | |
3642 | ret = PTR_ERR(handle); | |
3643 | handle = NULL; | |
3644 | mlog_errno(ret); | |
3645 | goto leave; | |
3646 | } | |
3647 | ||
3648 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
3649 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3650 | if (ret < 0) { | |
3651 | mlog_errno(ret); | |
3652 | goto leave; | |
3653 | } | |
3654 | ||
3655 | ret = __ocfs2_claim_clusters(osb, handle, data_ac, 1, | |
3656 | clusters_to_add, &bit_off, &num_bits); | |
3657 | if (ret < 0) { | |
3658 | if (ret != -ENOSPC) | |
3659 | mlog_errno(ret); | |
3660 | goto leave; | |
3661 | } | |
3662 | ||
3663 | BUG_ON(num_bits > clusters_to_add); | |
3664 | ||
3665 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
3666 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
3667 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
3668 | ||
3669 | if (prev_blkno + prev_clusters * bpc == block && | |
3670 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= | |
3671 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
3672 | /* | |
3673 | * If this cluster is contiguous with the old one and | |
3674 | * adding this new cluster, we don't surpass the limit of | |
3675 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
3676 | * initialized and used like other buckets in the previous | |
3677 | * cluster. | |
3678 | * So add it as a contiguous one. The caller will handle | |
3679 | * its init process. | |
3680 | */ | |
3681 | v_start = prev_cpos + prev_clusters; | |
3682 | *num_clusters = prev_clusters + num_bits; | |
3683 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
3684 | num_bits); | |
3685 | } else { | |
3686 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
3687 | handle, | |
3688 | first_bh, | |
3689 | header_bh, | |
3690 | block, | |
3691 | prev_blkno, | |
3692 | prev_clusters, | |
3693 | &v_start, | |
3694 | extend); | |
3695 | if (ret) { | |
3696 | mlog_errno(ret); | |
3697 | goto leave; | |
3698 | } | |
3699 | } | |
3700 | ||
28b8ca0b TM |
3701 | if (handle->h_buffer_credits < credits) { |
3702 | /* | |
3703 | * The journal has been restarted before, and don't | |
3704 | * have enough space for the insertion, so extend it | |
3705 | * here. | |
3706 | */ | |
3707 | ret = ocfs2_extend_trans(handle, credits); | |
3708 | if (ret) { | |
3709 | mlog_errno(ret); | |
3710 | goto leave; | |
3711 | } | |
3712 | } | |
01225596 TM |
3713 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", |
3714 | num_bits, block, v_start); | |
f99b9b7c JB |
3715 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
3716 | num_bits, 0, meta_ac); | |
01225596 TM |
3717 | if (ret < 0) { |
3718 | mlog_errno(ret); | |
3719 | goto leave; | |
3720 | } | |
3721 | ||
3722 | ret = ocfs2_journal_dirty(handle, root_bh); | |
3723 | if (ret < 0) { | |
3724 | mlog_errno(ret); | |
3725 | goto leave; | |
3726 | } | |
3727 | ||
3728 | leave: | |
3729 | if (handle) | |
3730 | ocfs2_commit_trans(osb, handle); | |
3731 | if (data_ac) | |
3732 | ocfs2_free_alloc_context(data_ac); | |
3733 | if (meta_ac) | |
3734 | ocfs2_free_alloc_context(meta_ac); | |
3735 | ||
3736 | return ret; | |
3737 | } | |
3738 | ||
3739 | /* | |
3740 | * Extend a new xattr bucket and move xattrs to the end one by one until | |
3741 | * We meet with start_bh. Only move half of the xattrs to the bucket after it. | |
3742 | */ | |
3743 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
3744 | struct buffer_head *first_bh, | |
3745 | struct buffer_head *start_bh, | |
3746 | u32 num_clusters) | |
3747 | { | |
3748 | int ret, credits; | |
3749 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3750 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3751 | u64 start_blk = start_bh->b_blocknr, end_blk; | |
3752 | u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); | |
3753 | handle_t *handle; | |
3754 | struct ocfs2_xattr_header *first_xh = | |
3755 | (struct ocfs2_xattr_header *)first_bh->b_data; | |
3756 | u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); | |
3757 | ||
3758 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
3759 | "from %llu, len = %u\n", start_blk, | |
3760 | (unsigned long long)first_bh->b_blocknr, num_clusters); | |
3761 | ||
3762 | BUG_ON(bucket >= num_buckets); | |
3763 | ||
3764 | end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; | |
3765 | ||
3766 | /* | |
3767 | * We will touch all the buckets after the start_bh(include it). | |
3768 | * Add one more bucket and modify the first_bh. | |
3769 | */ | |
3770 | credits = end_blk - start_blk + 2 * blk_per_bucket + 1; | |
3771 | handle = ocfs2_start_trans(osb, credits); | |
3772 | if (IS_ERR(handle)) { | |
3773 | ret = PTR_ERR(handle); | |
3774 | handle = NULL; | |
3775 | mlog_errno(ret); | |
3776 | goto out; | |
3777 | } | |
3778 | ||
3779 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3780 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3781 | if (ret) { | |
3782 | mlog_errno(ret); | |
3783 | goto commit; | |
3784 | } | |
3785 | ||
3786 | while (end_blk != start_blk) { | |
3787 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, | |
3788 | end_blk + blk_per_bucket, 0); | |
3789 | if (ret) | |
3790 | goto commit; | |
3791 | end_blk -= blk_per_bucket; | |
3792 | } | |
3793 | ||
3794 | /* Move half of the xattr in start_blk to the next bucket. */ | |
3795 | ret = ocfs2_half_xattr_bucket(inode, handle, start_blk, | |
3796 | start_blk + blk_per_bucket, NULL, 0); | |
3797 | ||
3798 | le16_add_cpu(&first_xh->xh_num_buckets, 1); | |
3799 | ocfs2_journal_dirty(handle, first_bh); | |
3800 | ||
3801 | commit: | |
3802 | ocfs2_commit_trans(osb, handle); | |
3803 | out: | |
3804 | return ret; | |
3805 | } | |
3806 | ||
3807 | /* | |
3808 | * Add new xattr bucket in an extent record and adjust the buckets accordingly. | |
3809 | * xb_bh is the ocfs2_xattr_block. | |
3810 | * We will move all the buckets starting from header_bh to the next place. As | |
3811 | * for this one, half num of its xattrs will be moved to the next one. | |
3812 | * | |
3813 | * We will allocate a new cluster if current cluster is full and adjust | |
3814 | * header_bh and first_bh if the insert place is moved to the new cluster. | |
3815 | */ | |
3816 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
3817 | struct buffer_head *xb_bh, | |
3818 | struct buffer_head *header_bh) | |
3819 | { | |
3820 | struct ocfs2_xattr_header *first_xh = NULL; | |
3821 | struct buffer_head *first_bh = NULL; | |
3822 | struct ocfs2_xattr_block *xb = | |
3823 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3824 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3825 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3826 | struct ocfs2_xattr_header *xh = | |
3827 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
3828 | u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3829 | struct super_block *sb = inode->i_sb; | |
3830 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
3831 | int ret, num_buckets, extend = 1; | |
3832 | u64 p_blkno; | |
3833 | u32 e_cpos, num_clusters; | |
3834 | ||
3835 | mlog(0, "Add new xattr bucket starting form %llu\n", | |
3836 | (unsigned long long)header_bh->b_blocknr); | |
3837 | ||
3838 | /* | |
3839 | * Add refrence for header_bh here because it may be | |
3840 | * changed in ocfs2_add_new_xattr_cluster and we need | |
3841 | * to free it in the end. | |
3842 | */ | |
3843 | get_bh(header_bh); | |
3844 | ||
3845 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, | |
3846 | &num_clusters, el); | |
3847 | if (ret) { | |
3848 | mlog_errno(ret); | |
3849 | goto out; | |
3850 | } | |
3851 | ||
0fcaa56a | 3852 | ret = ocfs2_read_block(inode, p_blkno, &first_bh); |
01225596 TM |
3853 | if (ret) { |
3854 | mlog_errno(ret); | |
3855 | goto out; | |
3856 | } | |
3857 | ||
3858 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; | |
3859 | first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3860 | ||
3861 | if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { | |
3862 | ret = ocfs2_add_new_xattr_cluster(inode, | |
3863 | xb_bh, | |
3864 | &first_bh, | |
3865 | &header_bh, | |
3866 | &num_clusters, | |
3867 | e_cpos, | |
3868 | p_blkno, | |
3869 | &extend); | |
3870 | if (ret) { | |
3871 | mlog_errno(ret); | |
3872 | goto out; | |
3873 | } | |
3874 | } | |
3875 | ||
3876 | if (extend) | |
3877 | ret = ocfs2_extend_xattr_bucket(inode, | |
3878 | first_bh, | |
3879 | header_bh, | |
3880 | num_clusters); | |
3881 | if (ret) | |
3882 | mlog_errno(ret); | |
3883 | out: | |
3884 | brelse(first_bh); | |
3885 | brelse(header_bh); | |
3886 | return ret; | |
3887 | } | |
3888 | ||
3889 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
3890 | struct ocfs2_xattr_bucket *bucket, | |
3891 | int offs) | |
3892 | { | |
3893 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
3894 | ||
3895 | offs = offs % inode->i_sb->s_blocksize; | |
3896 | return bucket->bhs[block_off]->b_data + offs; | |
3897 | } | |
3898 | ||
3899 | /* | |
3900 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
3901 | * |
3902 | * Note: "local" indicates the real data's locality. So we can't | |
3903 | * just its bucket locality by its length. | |
3904 | */ | |
3905 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
3906 | struct ocfs2_xattr_info *xi, | |
3907 | struct ocfs2_xattr_search *xs, | |
3908 | u32 name_hash, | |
5a095611 | 3909 | int local) |
01225596 TM |
3910 | { |
3911 | struct ocfs2_xattr_entry *last, *xe; | |
3912 | int name_len = strlen(xi->name); | |
3913 | struct ocfs2_xattr_header *xh = xs->header; | |
3914 | u16 count = le16_to_cpu(xh->xh_count), start; | |
3915 | size_t blocksize = inode->i_sb->s_blocksize; | |
3916 | char *val; | |
3917 | size_t offs, size, new_size; | |
3918 | ||
3919 | last = &xh->xh_entries[count]; | |
3920 | if (!xs->not_found) { | |
3921 | xe = xs->here; | |
3922 | offs = le16_to_cpu(xe->xe_name_offset); | |
3923 | if (ocfs2_xattr_is_local(xe)) | |
3924 | size = OCFS2_XATTR_SIZE(name_len) + | |
3925 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3926 | else | |
3927 | size = OCFS2_XATTR_SIZE(name_len) + | |
3928 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
3929 | ||
3930 | /* | |
3931 | * If the new value will be stored outside, xi->value has been | |
3932 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
3933 | * goes with xi->value_len, so we can set new_size safely here. | |
3934 | * See ocfs2_xattr_set_in_bucket. | |
3935 | */ | |
3936 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
3937 | OCFS2_XATTR_SIZE(xi->value_len); | |
3938 | ||
3939 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
3940 | if (xi->value) { | |
3941 | if (new_size > size) | |
3942 | goto set_new_name_value; | |
3943 | ||
3944 | /* Now replace the old value with new one. */ | |
3945 | if (local) | |
3946 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
3947 | else | |
3948 | xe->xe_value_size = 0; | |
3949 | ||
3950 | val = ocfs2_xattr_bucket_get_val(inode, | |
3951 | &xs->bucket, offs); | |
3952 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, | |
3953 | size - OCFS2_XATTR_SIZE(name_len)); | |
3954 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
3955 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
3956 | xi->value, xi->value_len); | |
3957 | ||
3958 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
3959 | ocfs2_xattr_set_local(xe, local); | |
3960 | return; | |
3961 | } else { | |
5a095611 TM |
3962 | /* |
3963 | * Remove the old entry if there is more than one. | |
3964 | * We don't remove the last entry so that we can | |
3965 | * use it to indicate the hash value of the empty | |
3966 | * bucket. | |
3967 | */ | |
01225596 | 3968 | last -= 1; |
01225596 | 3969 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
3970 | if (xh->xh_count) { |
3971 | memmove(xe, xe + 1, | |
3972 | (void *)last - (void *)xe); | |
3973 | memset(last, 0, | |
3974 | sizeof(struct ocfs2_xattr_entry)); | |
3975 | } else | |
3976 | xh->xh_free_start = | |
3977 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3978 | ||
01225596 TM |
3979 | return; |
3980 | } | |
3981 | } else { | |
3982 | /* find a new entry for insert. */ | |
3983 | int low = 0, high = count - 1, tmp; | |
3984 | struct ocfs2_xattr_entry *tmp_xe; | |
3985 | ||
5a095611 | 3986 | while (low <= high && count) { |
01225596 TM |
3987 | tmp = (low + high) / 2; |
3988 | tmp_xe = &xh->xh_entries[tmp]; | |
3989 | ||
3990 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
3991 | low = tmp + 1; | |
3992 | else if (name_hash < | |
3993 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
3994 | high = tmp - 1; | |
06b240d8 TM |
3995 | else { |
3996 | low = tmp; | |
01225596 | 3997 | break; |
06b240d8 | 3998 | } |
01225596 TM |
3999 | } |
4000 | ||
4001 | xe = &xh->xh_entries[low]; | |
4002 | if (low != count) | |
4003 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4004 | ||
4005 | le16_add_cpu(&xh->xh_count, 1); | |
4006 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4007 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4008 | xe->xe_name_len = name_len; | |
4009 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4010 | } | |
4011 | ||
4012 | set_new_name_value: | |
4013 | /* Insert the new name+value. */ | |
4014 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4015 | ||
4016 | /* | |
4017 | * We must make sure that the name/value pair | |
4018 | * exists in the same block. | |
4019 | */ | |
4020 | offs = le16_to_cpu(xh->xh_free_start); | |
4021 | start = offs - size; | |
4022 | ||
4023 | if (start >> inode->i_sb->s_blocksize_bits != | |
4024 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4025 | offs = offs - offs % blocksize; | |
4026 | xh->xh_free_start = cpu_to_le16(offs); | |
4027 | } | |
4028 | ||
4029 | val = ocfs2_xattr_bucket_get_val(inode, | |
4030 | &xs->bucket, offs - size); | |
4031 | xe->xe_name_offset = cpu_to_le16(offs - size); | |
4032 | ||
4033 | memset(val, 0, size); | |
4034 | memcpy(val, xi->name, name_len); | |
4035 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4036 | ||
4037 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4038 | ocfs2_xattr_set_local(xe, local); | |
4039 | xs->here = xe; | |
4040 | le16_add_cpu(&xh->xh_free_start, -size); | |
4041 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4042 | ||
4043 | return; | |
4044 | } | |
4045 | ||
4046 | static int ocfs2_xattr_bucket_handle_journal(struct inode *inode, | |
4047 | handle_t *handle, | |
4048 | struct ocfs2_xattr_search *xs, | |
4049 | struct buffer_head **bhs, | |
4050 | u16 bh_num) | |
4051 | { | |
4052 | int ret = 0, off, block_off; | |
4053 | struct ocfs2_xattr_entry *xe = xs->here; | |
4054 | ||
4055 | /* | |
4056 | * First calculate all the blocks we should journal_access | |
4057 | * and journal_dirty. The first block should always be touched. | |
4058 | */ | |
4059 | ret = ocfs2_journal_dirty(handle, bhs[0]); | |
4060 | if (ret) | |
4061 | mlog_errno(ret); | |
4062 | ||
4063 | /* calc the data. */ | |
4064 | off = le16_to_cpu(xe->xe_name_offset); | |
4065 | block_off = off >> inode->i_sb->s_blocksize_bits; | |
4066 | ret = ocfs2_journal_dirty(handle, bhs[block_off]); | |
4067 | if (ret) | |
4068 | mlog_errno(ret); | |
4069 | ||
4070 | return ret; | |
4071 | } | |
4072 | ||
4073 | /* | |
4074 | * Set the xattr entry in the specified bucket. | |
4075 | * The bucket is indicated by xs->bucket and it should have the enough | |
4076 | * space for the xattr insertion. | |
4077 | */ | |
4078 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
4079 | struct ocfs2_xattr_info *xi, | |
4080 | struct ocfs2_xattr_search *xs, | |
4081 | u32 name_hash, | |
5a095611 | 4082 | int local) |
01225596 TM |
4083 | { |
4084 | int i, ret; | |
4085 | handle_t *handle = NULL; | |
4086 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4087 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4088 | ||
ff1ec20e MF |
4089 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4090 | (unsigned long)xi->value_len, xi->name_index, | |
01225596 TM |
4091 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr); |
4092 | ||
4093 | if (!xs->bucket.bhs[1]) { | |
31d33073 | 4094 | ret = ocfs2_read_blocks(inode, |
01225596 TM |
4095 | xs->bucket.bhs[0]->b_blocknr + 1, |
4096 | blk_per_bucket - 1, &xs->bucket.bhs[1], | |
1efd47f8 | 4097 | 0); |
01225596 TM |
4098 | if (ret) { |
4099 | mlog_errno(ret); | |
4100 | goto out; | |
4101 | } | |
4102 | } | |
4103 | ||
4104 | handle = ocfs2_start_trans(osb, blk_per_bucket); | |
4105 | if (IS_ERR(handle)) { | |
4106 | ret = PTR_ERR(handle); | |
4107 | handle = NULL; | |
4108 | mlog_errno(ret); | |
4109 | goto out; | |
4110 | } | |
4111 | ||
4112 | for (i = 0; i < blk_per_bucket; i++) { | |
4113 | ret = ocfs2_journal_access(handle, inode, xs->bucket.bhs[i], | |
4114 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4115 | if (ret < 0) { | |
4116 | mlog_errno(ret); | |
4117 | goto out; | |
4118 | } | |
4119 | } | |
4120 | ||
5a095611 | 4121 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
01225596 TM |
4122 | |
4123 | /*Only dirty the blocks we have touched in set xattr. */ | |
4124 | ret = ocfs2_xattr_bucket_handle_journal(inode, handle, xs, | |
4125 | xs->bucket.bhs, blk_per_bucket); | |
4126 | if (ret) | |
4127 | mlog_errno(ret); | |
4128 | out: | |
4129 | ocfs2_commit_trans(osb, handle); | |
4130 | ||
4131 | return ret; | |
4132 | } | |
4133 | ||
4134 | static int ocfs2_xattr_value_update_size(struct inode *inode, | |
4135 | struct buffer_head *xe_bh, | |
4136 | struct ocfs2_xattr_entry *xe, | |
4137 | u64 new_size) | |
4138 | { | |
4139 | int ret; | |
4140 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4141 | handle_t *handle = NULL; | |
4142 | ||
4143 | handle = ocfs2_start_trans(osb, 1); | |
4144 | if (handle == NULL) { | |
4145 | ret = -ENOMEM; | |
4146 | mlog_errno(ret); | |
4147 | goto out; | |
4148 | } | |
4149 | ||
4150 | ret = ocfs2_journal_access(handle, inode, xe_bh, | |
4151 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4152 | if (ret < 0) { | |
4153 | mlog_errno(ret); | |
4154 | goto out_commit; | |
4155 | } | |
4156 | ||
4157 | xe->xe_value_size = cpu_to_le64(new_size); | |
4158 | ||
4159 | ret = ocfs2_journal_dirty(handle, xe_bh); | |
4160 | if (ret < 0) | |
4161 | mlog_errno(ret); | |
4162 | ||
4163 | out_commit: | |
4164 | ocfs2_commit_trans(osb, handle); | |
4165 | out: | |
4166 | return ret; | |
4167 | } | |
4168 | ||
4169 | /* | |
4170 | * Truncate the specified xe_off entry in xattr bucket. | |
4171 | * bucket is indicated by header_bh and len is the new length. | |
4172 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4173 | * | |
4174 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4175 | */ | |
4176 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
4177 | struct buffer_head *header_bh, | |
4178 | int xe_off, | |
4179 | int len) | |
4180 | { | |
4181 | int ret, offset; | |
4182 | u64 value_blk; | |
4183 | struct buffer_head *value_bh = NULL; | |
4184 | struct ocfs2_xattr_value_root *xv; | |
4185 | struct ocfs2_xattr_entry *xe; | |
4186 | struct ocfs2_xattr_header *xh = | |
4187 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4188 | size_t blocksize = inode->i_sb->s_blocksize; | |
4189 | ||
4190 | xe = &xh->xh_entries[xe_off]; | |
4191 | ||
4192 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4193 | ||
4194 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4195 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4196 | ||
4197 | value_blk = offset / blocksize; | |
4198 | ||
4199 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4200 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
4201 | value_blk += header_bh->b_blocknr; | |
4202 | ||
0fcaa56a | 4203 | ret = ocfs2_read_block(inode, value_blk, &value_bh); |
01225596 TM |
4204 | if (ret) { |
4205 | mlog_errno(ret); | |
4206 | goto out; | |
4207 | } | |
4208 | ||
4209 | xv = (struct ocfs2_xattr_value_root *) | |
4210 | (value_bh->b_data + offset % blocksize); | |
4211 | ||
4212 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4213 | xe_off, (unsigned long long)header_bh->b_blocknr, len); | |
4214 | ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len); | |
4215 | if (ret) { | |
4216 | mlog_errno(ret); | |
4217 | goto out; | |
4218 | } | |
4219 | ||
4220 | ret = ocfs2_xattr_value_update_size(inode, header_bh, xe, len); | |
4221 | if (ret) { | |
4222 | mlog_errno(ret); | |
4223 | goto out; | |
4224 | } | |
4225 | ||
4226 | out: | |
4227 | brelse(value_bh); | |
4228 | return ret; | |
4229 | } | |
4230 | ||
4231 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
4232 | struct ocfs2_xattr_search *xs, | |
4233 | int len) | |
4234 | { | |
4235 | int ret, offset; | |
4236 | struct ocfs2_xattr_entry *xe = xs->here; | |
4237 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4238 | ||
4239 | BUG_ON(!xs->bucket.bhs[0] || !xe || ocfs2_xattr_is_local(xe)); | |
4240 | ||
4241 | offset = xe - xh->xh_entries; | |
4242 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket.bhs[0], | |
4243 | offset, len); | |
4244 | if (ret) | |
4245 | mlog_errno(ret); | |
4246 | ||
4247 | return ret; | |
4248 | } | |
4249 | ||
4250 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
4251 | struct ocfs2_xattr_search *xs, | |
4252 | char *val, | |
4253 | int value_len) | |
4254 | { | |
4255 | int offset; | |
4256 | struct ocfs2_xattr_value_root *xv; | |
4257 | struct ocfs2_xattr_entry *xe = xs->here; | |
4258 | ||
4259 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4260 | ||
4261 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4262 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4263 | ||
4264 | xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); | |
4265 | ||
4266 | return __ocfs2_xattr_set_value_outside(inode, xv, val, value_len); | |
4267 | } | |
4268 | ||
01225596 TM |
4269 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4270 | struct buffer_head *root_bh, | |
4271 | u64 blkno, | |
4272 | u32 cpos, | |
4273 | u32 len) | |
4274 | { | |
4275 | int ret; | |
4276 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4277 | struct inode *tl_inode = osb->osb_tl_inode; | |
4278 | handle_t *handle; | |
4279 | struct ocfs2_xattr_block *xb = | |
4280 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4281 | struct ocfs2_alloc_context *meta_ac = NULL; |
4282 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4283 | struct ocfs2_extent_tree et; |
4284 | ||
8d6220d6 | 4285 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4286 | |
4287 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4288 | ||
4289 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4290 | cpos, len, (unsigned long long)blkno); | |
4291 | ||
4292 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4293 | ||
f99b9b7c | 4294 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4295 | if (ret) { |
4296 | mlog_errno(ret); | |
4297 | return ret; | |
4298 | } | |
4299 | ||
4300 | mutex_lock(&tl_inode->i_mutex); | |
4301 | ||
4302 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4303 | ret = __ocfs2_flush_truncate_log(osb); | |
4304 | if (ret < 0) { | |
4305 | mlog_errno(ret); | |
4306 | goto out; | |
4307 | } | |
4308 | } | |
4309 | ||
4310 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
4311 | if (handle == NULL) { | |
4312 | ret = -ENOMEM; | |
4313 | mlog_errno(ret); | |
4314 | goto out; | |
4315 | } | |
4316 | ||
4317 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
4318 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4319 | if (ret) { | |
4320 | mlog_errno(ret); | |
4321 | goto out_commit; | |
4322 | } | |
4323 | ||
f99b9b7c JB |
4324 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4325 | &dealloc); | |
01225596 TM |
4326 | if (ret) { |
4327 | mlog_errno(ret); | |
4328 | goto out_commit; | |
4329 | } | |
4330 | ||
4331 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4332 | ||
4333 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4334 | if (ret) { | |
4335 | mlog_errno(ret); | |
4336 | goto out_commit; | |
4337 | } | |
4338 | ||
4339 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4340 | if (ret) | |
4341 | mlog_errno(ret); | |
4342 | ||
4343 | out_commit: | |
4344 | ocfs2_commit_trans(osb, handle); | |
4345 | out: | |
4346 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4347 | ||
4348 | mutex_unlock(&tl_inode->i_mutex); | |
4349 | ||
4350 | if (meta_ac) | |
4351 | ocfs2_free_alloc_context(meta_ac); | |
4352 | ||
4353 | ocfs2_run_deallocs(osb, &dealloc); | |
4354 | ||
4355 | return ret; | |
4356 | } | |
4357 | ||
01225596 TM |
4358 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
4359 | struct ocfs2_xattr_search *xs) | |
4360 | { | |
4361 | handle_t *handle = NULL; | |
4362 | struct ocfs2_xattr_header *xh = xs->bucket.xh; | |
4363 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ | |
4364 | le16_to_cpu(xh->xh_count) - 1]; | |
4365 | int ret = 0; | |
4366 | ||
4367 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), 1); | |
4368 | if (IS_ERR(handle)) { | |
4369 | ret = PTR_ERR(handle); | |
4370 | mlog_errno(ret); | |
4371 | return; | |
4372 | } | |
4373 | ||
4374 | ret = ocfs2_journal_access(handle, inode, xs->bucket.bhs[0], | |
4375 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4376 | if (ret) { | |
4377 | mlog_errno(ret); | |
4378 | goto out_commit; | |
4379 | } | |
4380 | ||
4381 | /* Remove the old entry. */ | |
4382 | memmove(xs->here, xs->here + 1, | |
4383 | (void *)last - (void *)xs->here); | |
4384 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4385 | le16_add_cpu(&xh->xh_count, -1); | |
4386 | ||
4387 | ret = ocfs2_journal_dirty(handle, xs->bucket.bhs[0]); | |
4388 | if (ret < 0) | |
4389 | mlog_errno(ret); | |
4390 | out_commit: | |
4391 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
4392 | } | |
4393 | ||
4394 | /* | |
4395 | * Set the xattr name/value in the bucket specified in xs. | |
4396 | * | |
4397 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4398 | * we divide the whole process into 3 steps: | |
4399 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4400 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4401 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4402 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4403 | * to free the xattr we allocated in set. | |
4404 | */ | |
4405 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4406 | struct ocfs2_xattr_info *xi, | |
4407 | struct ocfs2_xattr_search *xs) | |
4408 | { | |
5a095611 | 4409 | int ret, local = 1; |
01225596 TM |
4410 | size_t value_len; |
4411 | char *val = (char *)xi->value; | |
4412 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4413 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4414 | strlen(xi->name)); | |
01225596 TM |
4415 | |
4416 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4417 | /* | |
4418 | * We need to truncate the xattr storage first. | |
4419 | * | |
4420 | * If both the old and new value are stored to | |
4421 | * outside block, we only need to truncate | |
4422 | * the storage and then set the value outside. | |
4423 | * | |
4424 | * If the new value should be stored within block, | |
4425 | * we should free all the outside block first and | |
4426 | * the modification to the xattr block will be done | |
4427 | * by following steps. | |
4428 | */ | |
4429 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4430 | value_len = xi->value_len; | |
4431 | else | |
4432 | value_len = 0; | |
4433 | ||
4434 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4435 | value_len); | |
4436 | if (ret) | |
4437 | goto out; | |
4438 | ||
4439 | if (value_len) | |
4440 | goto set_value_outside; | |
4441 | } | |
4442 | ||
4443 | value_len = xi->value_len; | |
4444 | /* So we have to handle the inside block change now. */ | |
4445 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4446 | /* | |
4447 | * If the new value will be stored outside of block, | |
4448 | * initalize a new empty value root and insert it first. | |
4449 | */ | |
4450 | local = 0; | |
4451 | xi->value = &def_xv; | |
4452 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4453 | } | |
4454 | ||
5a095611 | 4455 | ret = ocfs2_xattr_set_entry_in_bucket(inode, xi, xs, name_hash, local); |
01225596 TM |
4456 | if (ret) { |
4457 | mlog_errno(ret); | |
4458 | goto out; | |
4459 | } | |
4460 | ||
5a095611 TM |
4461 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
4462 | goto out; | |
01225596 | 4463 | |
5a095611 TM |
4464 | /* allocate the space now for the outside block storage. */ |
4465 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4466 | value_len); | |
4467 | if (ret) { | |
4468 | mlog_errno(ret); | |
4469 | ||
4470 | if (xs->not_found) { | |
4471 | /* | |
4472 | * We can't allocate enough clusters for outside | |
4473 | * storage and we have allocated xattr already, | |
4474 | * so need to remove it. | |
4475 | */ | |
4476 | ocfs2_xattr_bucket_remove_xs(inode, xs); | |
01225596 | 4477 | } |
01225596 TM |
4478 | goto out; |
4479 | } | |
4480 | ||
4481 | set_value_outside: | |
4482 | ret = ocfs2_xattr_bucket_set_value_outside(inode, xs, val, value_len); | |
4483 | out: | |
4484 | return ret; | |
4485 | } | |
4486 | ||
4487 | /* check whether the xattr bucket is filled up with the same hash value. */ | |
4488 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, | |
4489 | struct ocfs2_xattr_bucket *bucket) | |
4490 | { | |
4491 | struct ocfs2_xattr_header *xh = bucket->xh; | |
4492 | ||
4493 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
4494 | xh->xh_entries[0].xe_name_hash) { | |
4495 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
4496 | "hash = %u\n", | |
4497 | (unsigned long long)bucket->bhs[0]->b_blocknr, | |
4498 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); | |
4499 | return -ENOSPC; | |
4500 | } | |
4501 | ||
4502 | return 0; | |
4503 | } | |
4504 | ||
4505 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
4506 | struct ocfs2_xattr_info *xi, | |
4507 | struct ocfs2_xattr_search *xs) | |
4508 | { | |
4509 | struct ocfs2_xattr_header *xh; | |
4510 | struct ocfs2_xattr_entry *xe; | |
4511 | u16 count, header_size, xh_free_start; | |
4512 | int i, free, max_free, need, old; | |
4513 | size_t value_size = 0, name_len = strlen(xi->name); | |
4514 | size_t blocksize = inode->i_sb->s_blocksize; | |
4515 | int ret, allocation = 0; | |
4516 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4517 | ||
4518 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
4519 | ||
4520 | try_again: | |
4521 | xh = xs->header; | |
4522 | count = le16_to_cpu(xh->xh_count); | |
4523 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4524 | header_size = sizeof(struct ocfs2_xattr_header) + | |
4525 | count * sizeof(struct ocfs2_xattr_entry); | |
4526 | max_free = OCFS2_XATTR_BUCKET_SIZE - | |
4527 | le16_to_cpu(xh->xh_name_value_len) - header_size; | |
4528 | ||
4529 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
4530 | "of %u which exceed block size\n", | |
4531 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr, | |
4532 | header_size); | |
4533 | ||
4534 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4535 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
4536 | else if (xi->value) | |
4537 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
4538 | ||
4539 | if (xs->not_found) | |
4540 | need = sizeof(struct ocfs2_xattr_entry) + | |
4541 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
4542 | else { | |
4543 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
4544 | ||
4545 | /* | |
4546 | * We only replace the old value if the new length is smaller | |
4547 | * than the old one. Otherwise we will allocate new space in the | |
4548 | * bucket to store it. | |
4549 | */ | |
4550 | xe = xs->here; | |
4551 | if (ocfs2_xattr_is_local(xe)) | |
4552 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4553 | else | |
4554 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4555 | ||
4556 | if (old >= value_size) | |
4557 | need = 0; | |
4558 | } | |
4559 | ||
4560 | free = xh_free_start - header_size; | |
4561 | /* | |
4562 | * We need to make sure the new name/value pair | |
4563 | * can exist in the same block. | |
4564 | */ | |
4565 | if (xh_free_start % blocksize < need) | |
4566 | free -= xh_free_start % blocksize; | |
4567 | ||
4568 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
4569 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
4570 | " %u\n", xs->not_found, | |
4571 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr, | |
4572 | free, need, max_free, le16_to_cpu(xh->xh_free_start), | |
4573 | le16_to_cpu(xh->xh_name_value_len)); | |
4574 | ||
4575 | if (free < need || count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4576 | if (need <= max_free && | |
4577 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4578 | /* | |
4579 | * We can create the space by defragment. Since only the | |
4580 | * name/value will be moved, the xe shouldn't be changed | |
4581 | * in xs. | |
4582 | */ | |
4583 | ret = ocfs2_defrag_xattr_bucket(inode, &xs->bucket); | |
4584 | if (ret) { | |
4585 | mlog_errno(ret); | |
4586 | goto out; | |
4587 | } | |
4588 | ||
4589 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4590 | free = xh_free_start - header_size; | |
4591 | if (xh_free_start % blocksize < need) | |
4592 | free -= xh_free_start % blocksize; | |
4593 | ||
4594 | if (free >= need) | |
4595 | goto xattr_set; | |
4596 | ||
4597 | mlog(0, "Can't get enough space for xattr insert by " | |
4598 | "defragment. Need %u bytes, but we have %d, so " | |
4599 | "allocate new bucket for it.\n", need, free); | |
4600 | } | |
4601 | ||
4602 | /* | |
4603 | * We have to add new buckets or clusters and one | |
4604 | * allocation should leave us enough space for insert. | |
4605 | */ | |
4606 | BUG_ON(allocation); | |
4607 | ||
4608 | /* | |
4609 | * We do not allow for overlapping ranges between buckets. And | |
4610 | * the maximum number of collisions we will allow for then is | |
4611 | * one bucket's worth, so check it here whether we need to | |
4612 | * add a new bucket for the insert. | |
4613 | */ | |
4614 | ret = ocfs2_check_xattr_bucket_collision(inode, &xs->bucket); | |
4615 | if (ret) { | |
4616 | mlog_errno(ret); | |
4617 | goto out; | |
4618 | } | |
4619 | ||
4620 | ret = ocfs2_add_new_xattr_bucket(inode, | |
4621 | xs->xattr_bh, | |
4622 | xs->bucket.bhs[0]); | |
4623 | if (ret) { | |
4624 | mlog_errno(ret); | |
4625 | goto out; | |
4626 | } | |
4627 | ||
4628 | for (i = 0; i < blk_per_bucket; i++) | |
4629 | brelse(xs->bucket.bhs[i]); | |
4630 | ||
4631 | memset(&xs->bucket, 0, sizeof(xs->bucket)); | |
4632 | ||
4633 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
4634 | xi->name_index, | |
4635 | xi->name, xs); | |
4636 | if (ret && ret != -ENODATA) | |
4637 | goto out; | |
4638 | xs->not_found = ret; | |
4639 | allocation = 1; | |
4640 | goto try_again; | |
4641 | } | |
4642 | ||
4643 | xattr_set: | |
4644 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs); | |
4645 | out: | |
4646 | mlog_exit(ret); | |
4647 | return ret; | |
4648 | } | |
a3944256 TM |
4649 | |
4650 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
4651 | struct ocfs2_xattr_bucket *bucket, | |
4652 | void *para) | |
4653 | { | |
4654 | int ret = 0; | |
4655 | struct ocfs2_xattr_header *xh = bucket->xh; | |
4656 | u16 i; | |
4657 | struct ocfs2_xattr_entry *xe; | |
4658 | ||
4659 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4660 | xe = &xh->xh_entries[i]; | |
4661 | if (ocfs2_xattr_is_local(xe)) | |
4662 | continue; | |
4663 | ||
4664 | ret = ocfs2_xattr_bucket_value_truncate(inode, | |
4665 | bucket->bhs[0], | |
4666 | i, 0); | |
4667 | if (ret) { | |
4668 | mlog_errno(ret); | |
4669 | break; | |
4670 | } | |
4671 | } | |
4672 | ||
4673 | return ret; | |
4674 | } | |
4675 | ||
4676 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
4677 | struct buffer_head *xb_bh) | |
4678 | { | |
4679 | struct ocfs2_xattr_block *xb = | |
4680 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4681 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
4682 | int ret = 0; | |
4683 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
4684 | u64 p_blkno; | |
4685 | ||
4686 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
4687 | return 0; | |
4688 | ||
4689 | while (name_hash > 0) { | |
4690 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4691 | &e_cpos, &num_clusters, el); | |
4692 | if (ret) { | |
4693 | mlog_errno(ret); | |
4694 | goto out; | |
4695 | } | |
4696 | ||
4697 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
4698 | ocfs2_delete_xattr_in_bucket, | |
4699 | NULL); | |
4700 | if (ret) { | |
4701 | mlog_errno(ret); | |
4702 | goto out; | |
4703 | } | |
4704 | ||
4705 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
4706 | p_blkno, e_cpos, num_clusters); | |
4707 | if (ret) { | |
4708 | mlog_errno(ret); | |
4709 | break; | |
4710 | } | |
4711 | ||
4712 | if (e_cpos == 0) | |
4713 | break; | |
4714 | ||
4715 | name_hash = e_cpos - 1; | |
4716 | } | |
4717 | ||
4718 | out: | |
4719 | return ret; | |
4720 | } | |
99219aea MF |
4721 | |
4722 | /* | |
4723 | * 'trusted' attributes support | |
4724 | */ | |
4725 | ||
4726 | #define XATTR_TRUSTED_PREFIX "trusted." | |
4727 | ||
4728 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, | |
4729 | size_t list_size, const char *name, | |
4730 | size_t name_len) | |
4731 | { | |
4732 | const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX) - 1; | |
4733 | const size_t total_len = prefix_len + name_len + 1; | |
4734 | ||
4735 | if (list && total_len <= list_size) { | |
4736 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
4737 | memcpy(list + prefix_len, name, name_len); | |
4738 | list[prefix_len + name_len] = '\0'; | |
4739 | } | |
4740 | return total_len; | |
4741 | } | |
4742 | ||
4743 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
4744 | void *buffer, size_t size) | |
4745 | { | |
4746 | if (strcmp(name, "") == 0) | |
4747 | return -EINVAL; | |
4748 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
4749 | buffer, size); | |
4750 | } | |
4751 | ||
4752 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
4753 | const void *value, size_t size, int flags) | |
4754 | { | |
4755 | if (strcmp(name, "") == 0) | |
4756 | return -EINVAL; | |
4757 | ||
4758 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
4759 | size, flags); | |
4760 | } | |
4761 | ||
4762 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
4763 | .prefix = XATTR_TRUSTED_PREFIX, | |
4764 | .list = ocfs2_xattr_trusted_list, | |
4765 | .get = ocfs2_xattr_trusted_get, | |
4766 | .set = ocfs2_xattr_trusted_set, | |
4767 | }; | |
4768 | ||
4769 | ||
4770 | /* | |
4771 | * 'user' attributes support | |
4772 | */ | |
4773 | ||
4774 | #define XATTR_USER_PREFIX "user." | |
4775 | ||
4776 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, | |
4777 | size_t list_size, const char *name, | |
4778 | size_t name_len) | |
4779 | { | |
4780 | const size_t prefix_len = sizeof(XATTR_USER_PREFIX) - 1; | |
4781 | const size_t total_len = prefix_len + name_len + 1; | |
4782 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4783 | ||
4784 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4785 | return 0; | |
4786 | ||
4787 | if (list && total_len <= list_size) { | |
4788 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
4789 | memcpy(list + prefix_len, name, name_len); | |
4790 | list[prefix_len + name_len] = '\0'; | |
4791 | } | |
4792 | return total_len; | |
4793 | } | |
4794 | ||
4795 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
4796 | void *buffer, size_t size) | |
4797 | { | |
4798 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4799 | ||
4800 | if (strcmp(name, "") == 0) | |
4801 | return -EINVAL; | |
4802 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4803 | return -EOPNOTSUPP; | |
4804 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
4805 | buffer, size); | |
4806 | } | |
4807 | ||
4808 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
4809 | const void *value, size_t size, int flags) | |
4810 | { | |
4811 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4812 | ||
4813 | if (strcmp(name, "") == 0) | |
4814 | return -EINVAL; | |
4815 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4816 | return -EOPNOTSUPP; | |
4817 | ||
4818 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
4819 | size, flags); | |
4820 | } | |
4821 | ||
4822 | struct xattr_handler ocfs2_xattr_user_handler = { | |
4823 | .prefix = XATTR_USER_PREFIX, | |
4824 | .list = ocfs2_xattr_user_list, | |
4825 | .get = ocfs2_xattr_user_get, | |
4826 | .set = ocfs2_xattr_user_set, | |
4827 | }; |