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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 | 63 | struct ocfs2_xattr_bucket { |
4ac6032d | 64 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
0c044f0b TM |
65 | }; |
66 | ||
cf1d6c76 TY |
67 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
68 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
69 | ||
70 | static struct ocfs2_xattr_def_value_root def_xv = { | |
71 | .xv.xr_list.l_count = cpu_to_le16(1), | |
72 | }; | |
73 | ||
74 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
75 | &ocfs2_xattr_user_handler, | |
76 | &ocfs2_xattr_trusted_handler, | |
77 | NULL | |
78 | }; | |
79 | ||
c988fd04 | 80 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 TY |
81 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
82 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, | |
83 | }; | |
84 | ||
85 | struct ocfs2_xattr_info { | |
86 | int name_index; | |
87 | const char *name; | |
88 | const void *value; | |
89 | size_t value_len; | |
90 | }; | |
91 | ||
92 | struct ocfs2_xattr_search { | |
93 | struct buffer_head *inode_bh; | |
94 | /* | |
95 | * xattr_bh point to the block buffer head which has extended attribute | |
96 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
97 | */ | |
98 | struct buffer_head *xattr_bh; | |
99 | struct ocfs2_xattr_header *header; | |
589dc260 | 100 | struct ocfs2_xattr_bucket bucket; |
cf1d6c76 TY |
101 | void *base; |
102 | void *end; | |
103 | struct ocfs2_xattr_entry *here; | |
104 | int not_found; | |
105 | }; | |
106 | ||
589dc260 TM |
107 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
108 | struct ocfs2_xattr_header *xh, | |
109 | int index, | |
110 | int *block_off, | |
111 | int *new_offset); | |
112 | ||
54f443f4 JB |
113 | static int ocfs2_xattr_block_find(struct inode *inode, |
114 | int name_index, | |
115 | const char *name, | |
116 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
117 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
118 | struct buffer_head *root_bh, | |
119 | int name_index, | |
120 | const char *name, | |
121 | struct ocfs2_xattr_search *xs); | |
122 | ||
0c044f0b TM |
123 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
124 | struct ocfs2_xattr_tree_root *xt, | |
125 | char *buffer, | |
126 | size_t buffer_size); | |
127 | ||
01225596 TM |
128 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
129 | struct ocfs2_xattr_search *xs); | |
130 | ||
131 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
132 | struct ocfs2_xattr_info *xi, | |
133 | struct ocfs2_xattr_search *xs); | |
134 | ||
a3944256 TM |
135 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
136 | struct buffer_head *xb_bh); | |
137 | ||
0030e001 TY |
138 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
139 | { | |
140 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
141 | } | |
142 | ||
143 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
144 | { | |
145 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
146 | } | |
147 | ||
148 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
149 | { | |
150 | u16 len = sb->s_blocksize - | |
151 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
152 | ||
153 | return len / sizeof(struct ocfs2_xattr_entry); | |
154 | } | |
155 | ||
9c7759aa | 156 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 157 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 158 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 159 | |
936b8834 | 160 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
161 | { |
162 | struct xattr_handler *handler = NULL; | |
163 | ||
164 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
165 | handler = ocfs2_xattr_handler_map[name_index]; | |
166 | ||
936b8834 | 167 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
168 | } |
169 | ||
40daa16a | 170 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 171 | const char *name, |
40daa16a | 172 | int name_len) |
cf1d6c76 TY |
173 | { |
174 | /* Get hash value of uuid from super block */ | |
175 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
176 | int i; | |
177 | ||
cf1d6c76 TY |
178 | /* hash extended attribute name */ |
179 | for (i = 0; i < name_len; i++) { | |
180 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
181 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
182 | *name++; | |
183 | } | |
184 | ||
185 | return hash; | |
186 | } | |
187 | ||
188 | /* | |
189 | * ocfs2_xattr_hash_entry() | |
190 | * | |
191 | * Compute the hash of an extended attribute. | |
192 | */ | |
193 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
194 | struct ocfs2_xattr_header *header, | |
195 | struct ocfs2_xattr_entry *entry) | |
196 | { | |
197 | u32 hash = 0; | |
cf1d6c76 | 198 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 199 | |
2057e5c6 | 200 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
201 | entry->xe_name_hash = cpu_to_le32(hash); |
202 | ||
203 | return; | |
204 | } | |
f56654c4 TM |
205 | |
206 | static int ocfs2_xattr_extend_allocation(struct inode *inode, | |
207 | u32 clusters_to_add, | |
208 | struct buffer_head *xattr_bh, | |
209 | struct ocfs2_xattr_value_root *xv) | |
210 | { | |
211 | int status = 0; | |
212 | int restart_func = 0; | |
213 | int credits = 0; | |
214 | handle_t *handle = NULL; | |
215 | struct ocfs2_alloc_context *data_ac = NULL; | |
216 | struct ocfs2_alloc_context *meta_ac = NULL; | |
217 | enum ocfs2_alloc_restarted why; | |
218 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 | 219 | u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); |
f99b9b7c | 220 | struct ocfs2_extent_tree et; |
f56654c4 TM |
221 | |
222 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
223 | ||
8d6220d6 | 224 | ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
f99b9b7c | 225 | |
f56654c4 TM |
226 | restart_all: |
227 | ||
f99b9b7c JB |
228 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
229 | &data_ac, &meta_ac); | |
f56654c4 TM |
230 | if (status) { |
231 | mlog_errno(status); | |
232 | goto leave; | |
233 | } | |
234 | ||
f99b9b7c JB |
235 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
236 | clusters_to_add); | |
f56654c4 TM |
237 | handle = ocfs2_start_trans(osb, credits); |
238 | if (IS_ERR(handle)) { | |
239 | status = PTR_ERR(handle); | |
240 | handle = NULL; | |
241 | mlog_errno(status); | |
242 | goto leave; | |
243 | } | |
244 | ||
245 | restarted_transaction: | |
246 | status = ocfs2_journal_access(handle, inode, xattr_bh, | |
247 | OCFS2_JOURNAL_ACCESS_WRITE); | |
248 | if (status < 0) { | |
249 | mlog_errno(status); | |
250 | goto leave; | |
251 | } | |
252 | ||
253 | prev_clusters = le32_to_cpu(xv->xr_clusters); | |
254 | status = ocfs2_add_clusters_in_btree(osb, | |
255 | inode, | |
256 | &logical_start, | |
257 | clusters_to_add, | |
258 | 0, | |
f99b9b7c | 259 | &et, |
f56654c4 TM |
260 | handle, |
261 | data_ac, | |
262 | meta_ac, | |
f99b9b7c | 263 | &why); |
f56654c4 TM |
264 | if ((status < 0) && (status != -EAGAIN)) { |
265 | if (status != -ENOSPC) | |
266 | mlog_errno(status); | |
267 | goto leave; | |
268 | } | |
269 | ||
270 | status = ocfs2_journal_dirty(handle, xattr_bh); | |
271 | if (status < 0) { | |
272 | mlog_errno(status); | |
273 | goto leave; | |
274 | } | |
275 | ||
276 | clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; | |
277 | ||
278 | if (why != RESTART_NONE && clusters_to_add) { | |
279 | if (why == RESTART_META) { | |
280 | mlog(0, "restarting function.\n"); | |
281 | restart_func = 1; | |
282 | } else { | |
283 | BUG_ON(why != RESTART_TRANS); | |
284 | ||
285 | mlog(0, "restarting transaction.\n"); | |
286 | /* TODO: This can be more intelligent. */ | |
287 | credits = ocfs2_calc_extend_credits(osb->sb, | |
f99b9b7c | 288 | et.et_root_el, |
f56654c4 TM |
289 | clusters_to_add); |
290 | status = ocfs2_extend_trans(handle, credits); | |
291 | if (status < 0) { | |
292 | /* handle still has to be committed at | |
293 | * this point. */ | |
294 | status = -ENOMEM; | |
295 | mlog_errno(status); | |
296 | goto leave; | |
297 | } | |
298 | goto restarted_transaction; | |
299 | } | |
300 | } | |
301 | ||
302 | leave: | |
303 | if (handle) { | |
304 | ocfs2_commit_trans(osb, handle); | |
305 | handle = NULL; | |
306 | } | |
307 | if (data_ac) { | |
308 | ocfs2_free_alloc_context(data_ac); | |
309 | data_ac = NULL; | |
310 | } | |
311 | if (meta_ac) { | |
312 | ocfs2_free_alloc_context(meta_ac); | |
313 | meta_ac = NULL; | |
314 | } | |
315 | if ((!status) && restart_func) { | |
316 | restart_func = 0; | |
317 | goto restart_all; | |
318 | } | |
319 | ||
320 | return status; | |
321 | } | |
322 | ||
323 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
324 | struct buffer_head *root_bh, | |
325 | struct ocfs2_xattr_value_root *xv, | |
326 | u32 cpos, u32 phys_cpos, u32 len, | |
327 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
328 | { | |
329 | int ret; | |
330 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
331 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
332 | struct inode *tl_inode = osb->osb_tl_inode; | |
333 | handle_t *handle; | |
334 | struct ocfs2_alloc_context *meta_ac = NULL; | |
f99b9b7c JB |
335 | struct ocfs2_extent_tree et; |
336 | ||
8d6220d6 | 337 | ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
f56654c4 | 338 | |
f99b9b7c | 339 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
f56654c4 TM |
340 | if (ret) { |
341 | mlog_errno(ret); | |
342 | return ret; | |
343 | } | |
344 | ||
345 | mutex_lock(&tl_inode->i_mutex); | |
346 | ||
347 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
348 | ret = __ocfs2_flush_truncate_log(osb); | |
349 | if (ret < 0) { | |
350 | mlog_errno(ret); | |
351 | goto out; | |
352 | } | |
353 | } | |
354 | ||
355 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
356 | if (IS_ERR(handle)) { | |
357 | ret = PTR_ERR(handle); | |
358 | mlog_errno(ret); | |
359 | goto out; | |
360 | } | |
361 | ||
362 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
363 | OCFS2_JOURNAL_ACCESS_WRITE); | |
364 | if (ret) { | |
365 | mlog_errno(ret); | |
366 | goto out_commit; | |
367 | } | |
368 | ||
f99b9b7c JB |
369 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
370 | dealloc); | |
f56654c4 TM |
371 | if (ret) { |
372 | mlog_errno(ret); | |
373 | goto out_commit; | |
374 | } | |
375 | ||
376 | le32_add_cpu(&xv->xr_clusters, -len); | |
377 | ||
378 | ret = ocfs2_journal_dirty(handle, root_bh); | |
379 | if (ret) { | |
380 | mlog_errno(ret); | |
381 | goto out_commit; | |
382 | } | |
383 | ||
384 | ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len); | |
385 | if (ret) | |
386 | mlog_errno(ret); | |
387 | ||
388 | out_commit: | |
389 | ocfs2_commit_trans(osb, handle); | |
390 | out: | |
391 | mutex_unlock(&tl_inode->i_mutex); | |
392 | ||
393 | if (meta_ac) | |
394 | ocfs2_free_alloc_context(meta_ac); | |
395 | ||
396 | return ret; | |
397 | } | |
398 | ||
399 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
400 | u32 old_clusters, | |
401 | u32 new_clusters, | |
402 | struct buffer_head *root_bh, | |
403 | struct ocfs2_xattr_value_root *xv) | |
404 | { | |
405 | int ret = 0; | |
406 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
407 | u64 block; | |
408 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
409 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
410 | ||
411 | ocfs2_init_dealloc_ctxt(&dealloc); | |
412 | ||
413 | if (old_clusters <= new_clusters) | |
414 | return 0; | |
415 | ||
416 | cpos = new_clusters; | |
417 | trunc_len = old_clusters - new_clusters; | |
418 | while (trunc_len) { | |
419 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
420 | &alloc_size, &xv->xr_list); | |
421 | if (ret) { | |
422 | mlog_errno(ret); | |
423 | goto out; | |
424 | } | |
425 | ||
426 | if (alloc_size > trunc_len) | |
427 | alloc_size = trunc_len; | |
428 | ||
429 | ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, | |
430 | phys_cpos, alloc_size, | |
431 | &dealloc); | |
432 | if (ret) { | |
433 | mlog_errno(ret); | |
434 | goto out; | |
435 | } | |
436 | ||
437 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
438 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
439 | alloc_size); | |
440 | cpos += alloc_size; | |
441 | trunc_len -= alloc_size; | |
442 | } | |
443 | ||
444 | out: | |
445 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
446 | ocfs2_run_deallocs(osb, &dealloc); | |
447 | ||
448 | return ret; | |
449 | } | |
450 | ||
451 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
452 | struct buffer_head *root_bh, | |
453 | struct ocfs2_xattr_value_root *xv, | |
454 | int len) | |
455 | { | |
456 | int ret; | |
457 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
458 | u32 old_clusters = le32_to_cpu(xv->xr_clusters); | |
459 | ||
460 | if (new_clusters == old_clusters) | |
461 | return 0; | |
462 | ||
463 | if (new_clusters > old_clusters) | |
464 | ret = ocfs2_xattr_extend_allocation(inode, | |
465 | new_clusters - old_clusters, | |
466 | root_bh, xv); | |
467 | else | |
468 | ret = ocfs2_xattr_shrink_size(inode, | |
469 | old_clusters, new_clusters, | |
470 | root_bh, xv); | |
471 | ||
472 | return ret; | |
473 | } | |
cf1d6c76 | 474 | |
936b8834 TM |
475 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
476 | size_t *result, const char *prefix, | |
477 | const char *name, int name_len) | |
478 | { | |
479 | char *p = buffer + *result; | |
480 | int prefix_len = strlen(prefix); | |
481 | int total_len = prefix_len + name_len + 1; | |
482 | ||
483 | *result += total_len; | |
484 | ||
485 | /* we are just looking for how big our buffer needs to be */ | |
486 | if (!size) | |
487 | return 0; | |
488 | ||
489 | if (*result > size) | |
490 | return -ERANGE; | |
491 | ||
492 | memcpy(p, prefix, prefix_len); | |
493 | memcpy(p + prefix_len, name, name_len); | |
494 | p[prefix_len + name_len] = '\0'; | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
cf1d6c76 TY |
499 | static int ocfs2_xattr_list_entries(struct inode *inode, |
500 | struct ocfs2_xattr_header *header, | |
501 | char *buffer, size_t buffer_size) | |
502 | { | |
936b8834 TM |
503 | size_t result = 0; |
504 | int i, type, ret; | |
505 | const char *prefix, *name; | |
cf1d6c76 TY |
506 | |
507 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
508 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
509 | type = ocfs2_xattr_get_type(entry); |
510 | prefix = ocfs2_xattr_prefix(type); | |
511 | ||
512 | if (prefix) { | |
513 | name = (const char *)header + | |
514 | le16_to_cpu(entry->xe_name_offset); | |
515 | ||
516 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
517 | &result, prefix, name, | |
518 | entry->xe_name_len); | |
519 | if (ret) | |
520 | return ret; | |
cf1d6c76 TY |
521 | } |
522 | } | |
523 | ||
936b8834 | 524 | return result; |
cf1d6c76 TY |
525 | } |
526 | ||
527 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
528 | struct ocfs2_dinode *di, | |
529 | char *buffer, | |
530 | size_t buffer_size) | |
531 | { | |
532 | struct ocfs2_xattr_header *header = NULL; | |
533 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
534 | int ret = 0; | |
535 | ||
536 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
537 | return ret; | |
538 | ||
539 | header = (struct ocfs2_xattr_header *) | |
540 | ((void *)di + inode->i_sb->s_blocksize - | |
541 | le16_to_cpu(di->i_xattr_inline_size)); | |
542 | ||
543 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
548 | static int ocfs2_xattr_block_list(struct inode *inode, | |
549 | struct ocfs2_dinode *di, | |
550 | char *buffer, | |
551 | size_t buffer_size) | |
552 | { | |
553 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 554 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
555 | int ret = 0; |
556 | ||
557 | if (!di->i_xattr_loc) | |
558 | return ret; | |
559 | ||
0fcaa56a | 560 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
561 | if (ret < 0) { |
562 | mlog_errno(ret); | |
563 | return ret; | |
564 | } | |
cf1d6c76 | 565 | |
0c044f0b | 566 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
f6087fb7 JB |
567 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
568 | ret = -EIO; | |
569 | goto cleanup; | |
570 | } | |
cf1d6c76 | 571 | |
0c044f0b TM |
572 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
573 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
574 | ret = ocfs2_xattr_list_entries(inode, header, | |
575 | buffer, buffer_size); | |
576 | } else { | |
577 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
578 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
579 | buffer, buffer_size); | |
580 | } | |
cf1d6c76 TY |
581 | cleanup: |
582 | brelse(blk_bh); | |
583 | ||
584 | return ret; | |
585 | } | |
586 | ||
587 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
588 | char *buffer, | |
589 | size_t size) | |
590 | { | |
591 | int ret = 0, i_ret = 0, b_ret = 0; | |
592 | struct buffer_head *di_bh = NULL; | |
593 | struct ocfs2_dinode *di = NULL; | |
594 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
595 | ||
8154da3d TY |
596 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
597 | return -EOPNOTSUPP; | |
598 | ||
cf1d6c76 TY |
599 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
600 | return ret; | |
601 | ||
602 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
603 | if (ret < 0) { | |
604 | mlog_errno(ret); | |
605 | return ret; | |
606 | } | |
607 | ||
608 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
609 | ||
610 | down_read(&oi->ip_xattr_sem); | |
611 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
612 | if (i_ret < 0) | |
613 | b_ret = 0; | |
614 | else { | |
615 | if (buffer) { | |
616 | buffer += i_ret; | |
617 | size -= i_ret; | |
618 | } | |
619 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
620 | buffer, size); | |
621 | if (b_ret < 0) | |
622 | i_ret = 0; | |
623 | } | |
624 | up_read(&oi->ip_xattr_sem); | |
625 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
626 | ||
627 | brelse(di_bh); | |
628 | ||
629 | return i_ret + b_ret; | |
630 | } | |
631 | ||
632 | static int ocfs2_xattr_find_entry(int name_index, | |
633 | const char *name, | |
634 | struct ocfs2_xattr_search *xs) | |
635 | { | |
636 | struct ocfs2_xattr_entry *entry; | |
637 | size_t name_len; | |
638 | int i, cmp = 1; | |
639 | ||
640 | if (name == NULL) | |
641 | return -EINVAL; | |
642 | ||
643 | name_len = strlen(name); | |
644 | entry = xs->here; | |
645 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
646 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
647 | if (!cmp) | |
648 | cmp = name_len - entry->xe_name_len; | |
649 | if (!cmp) | |
650 | cmp = memcmp(name, (xs->base + | |
651 | le16_to_cpu(entry->xe_name_offset)), | |
652 | name_len); | |
653 | if (cmp == 0) | |
654 | break; | |
655 | entry += 1; | |
656 | } | |
657 | xs->here = entry; | |
658 | ||
659 | return cmp ? -ENODATA : 0; | |
660 | } | |
661 | ||
662 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 663 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
664 | void *buffer, |
665 | size_t len) | |
666 | { | |
667 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
668 | u64 blkno; | |
669 | int i, ret = 0; | |
670 | size_t cplen, blocksize; | |
671 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
672 | struct ocfs2_extent_list *el; |
673 | ||
cf1d6c76 TY |
674 | el = &xv->xr_list; |
675 | clusters = le32_to_cpu(xv->xr_clusters); | |
676 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
677 | blocksize = inode->i_sb->s_blocksize; | |
678 | ||
679 | cpos = 0; | |
680 | while (cpos < clusters) { | |
681 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
682 | &num_clusters, el); | |
683 | if (ret) { | |
684 | mlog_errno(ret); | |
685 | goto out; | |
686 | } | |
687 | ||
688 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
689 | /* Copy ocfs2_xattr_value */ | |
690 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 691 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
692 | if (ret) { |
693 | mlog_errno(ret); | |
694 | goto out; | |
695 | } | |
696 | ||
697 | cplen = len >= blocksize ? blocksize : len; | |
698 | memcpy(buffer, bh->b_data, cplen); | |
699 | len -= cplen; | |
700 | buffer += cplen; | |
701 | ||
702 | brelse(bh); | |
703 | bh = NULL; | |
704 | if (len == 0) | |
705 | break; | |
706 | } | |
707 | cpos += num_clusters; | |
708 | } | |
709 | out: | |
710 | return ret; | |
711 | } | |
712 | ||
713 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
714 | int name_index, | |
715 | const char *name, | |
716 | void *buffer, | |
717 | size_t buffer_size, | |
718 | struct ocfs2_xattr_search *xs) | |
719 | { | |
720 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
721 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 722 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
723 | size_t size; |
724 | int ret = 0; | |
725 | ||
726 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
727 | return -ENODATA; | |
728 | ||
729 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
730 | xs->header = (struct ocfs2_xattr_header *) | |
731 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
732 | xs->base = (void *)xs->header; | |
733 | xs->here = xs->header->xh_entries; | |
734 | ||
735 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
736 | if (ret) | |
737 | return ret; | |
738 | size = le64_to_cpu(xs->here->xe_value_size); | |
739 | if (buffer) { | |
740 | if (size > buffer_size) | |
741 | return -ERANGE; | |
742 | if (ocfs2_xattr_is_local(xs->here)) { | |
743 | memcpy(buffer, (void *)xs->base + | |
744 | le16_to_cpu(xs->here->xe_name_offset) + | |
745 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
746 | } else { | |
589dc260 TM |
747 | xv = (struct ocfs2_xattr_value_root *) |
748 | (xs->base + le16_to_cpu( | |
749 | xs->here->xe_name_offset) + | |
750 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
751 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
752 | buffer, size); |
753 | if (ret < 0) { | |
754 | mlog_errno(ret); | |
755 | return ret; | |
756 | } | |
757 | } | |
758 | } | |
759 | ||
760 | return size; | |
761 | } | |
762 | ||
763 | static int ocfs2_xattr_block_get(struct inode *inode, | |
764 | int name_index, | |
765 | const char *name, | |
766 | void *buffer, | |
767 | size_t buffer_size, | |
768 | struct ocfs2_xattr_search *xs) | |
769 | { | |
cf1d6c76 | 770 | struct ocfs2_xattr_block *xb; |
589dc260 | 771 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 772 | size_t size; |
589dc260 | 773 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 | 774 | |
589dc260 TM |
775 | memset(&xs->bucket, 0, sizeof(xs->bucket)); |
776 | ||
54f443f4 JB |
777 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
778 | if (ret) { | |
cf1d6c76 | 779 | mlog_errno(ret); |
cf1d6c76 TY |
780 | goto cleanup; |
781 | } | |
782 | ||
6c1e183e TY |
783 | if (xs->not_found) { |
784 | ret = -ENODATA; | |
785 | goto cleanup; | |
786 | } | |
787 | ||
54f443f4 | 788 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
789 | size = le64_to_cpu(xs->here->xe_value_size); |
790 | if (buffer) { | |
791 | ret = -ERANGE; | |
792 | if (size > buffer_size) | |
793 | goto cleanup; | |
589dc260 TM |
794 | |
795 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
796 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
797 | i = xs->here - xs->header->xh_entries; | |
798 | ||
799 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
800 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
3e632946 | 801 | bucket_xh(&xs->bucket), |
589dc260 TM |
802 | i, |
803 | &block_off, | |
804 | &name_offset); | |
51def39f | 805 | xs->base = bucket_block(&xs->bucket, block_off); |
589dc260 | 806 | } |
cf1d6c76 TY |
807 | if (ocfs2_xattr_is_local(xs->here)) { |
808 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 809 | name_offset + name_len, size); |
cf1d6c76 | 810 | } else { |
589dc260 TM |
811 | xv = (struct ocfs2_xattr_value_root *) |
812 | (xs->base + name_offset + name_len); | |
813 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
814 | buffer, size); |
815 | if (ret < 0) { | |
816 | mlog_errno(ret); | |
817 | goto cleanup; | |
818 | } | |
819 | } | |
820 | } | |
821 | ret = size; | |
822 | cleanup: | |
589dc260 | 823 | for (i = 0; i < OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET; i++) |
4ac6032d | 824 | brelse(xs->bucket.bu_bhs[i]); |
589dc260 | 825 | memset(&xs->bucket, 0, sizeof(xs->bucket)); |
cf1d6c76 | 826 | |
54f443f4 JB |
827 | brelse(xs->xattr_bh); |
828 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
829 | return ret; |
830 | } | |
831 | ||
832 | /* ocfs2_xattr_get() | |
833 | * | |
834 | * Copy an extended attribute into the buffer provided. | |
835 | * Buffer is NULL to compute the size of buffer required. | |
836 | */ | |
0030e001 TY |
837 | static int ocfs2_xattr_get(struct inode *inode, |
838 | int name_index, | |
839 | const char *name, | |
840 | void *buffer, | |
841 | size_t buffer_size) | |
cf1d6c76 TY |
842 | { |
843 | int ret; | |
844 | struct ocfs2_dinode *di = NULL; | |
845 | struct buffer_head *di_bh = NULL; | |
846 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
847 | struct ocfs2_xattr_search xis = { | |
848 | .not_found = -ENODATA, | |
849 | }; | |
850 | struct ocfs2_xattr_search xbs = { | |
851 | .not_found = -ENODATA, | |
852 | }; | |
853 | ||
8154da3d TY |
854 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
855 | return -EOPNOTSUPP; | |
856 | ||
cf1d6c76 TY |
857 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
858 | ret = -ENODATA; | |
859 | ||
860 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
861 | if (ret < 0) { | |
862 | mlog_errno(ret); | |
863 | return ret; | |
864 | } | |
865 | xis.inode_bh = xbs.inode_bh = di_bh; | |
866 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
867 | ||
868 | down_read(&oi->ip_xattr_sem); | |
869 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
870 | buffer_size, &xis); | |
6c1e183e | 871 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
872 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
873 | buffer_size, &xbs); | |
874 | up_read(&oi->ip_xattr_sem); | |
875 | ocfs2_inode_unlock(inode, 0); | |
876 | ||
877 | brelse(di_bh); | |
878 | ||
879 | return ret; | |
880 | } | |
881 | ||
882 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
883 | struct ocfs2_xattr_value_root *xv, | |
884 | const void *value, | |
885 | int value_len) | |
886 | { | |
887 | int ret = 0, i, cp_len, credits; | |
888 | u16 blocksize = inode->i_sb->s_blocksize; | |
889 | u32 p_cluster, num_clusters; | |
890 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
891 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
892 | u64 blkno; | |
893 | struct buffer_head *bh = NULL; | |
894 | handle_t *handle; | |
895 | ||
896 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
897 | ||
898 | credits = clusters * bpc; | |
899 | handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); | |
900 | if (IS_ERR(handle)) { | |
901 | ret = PTR_ERR(handle); | |
902 | mlog_errno(ret); | |
903 | goto out; | |
904 | } | |
905 | ||
906 | while (cpos < clusters) { | |
907 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
908 | &num_clusters, &xv->xr_list); | |
909 | if (ret) { | |
910 | mlog_errno(ret); | |
911 | goto out_commit; | |
912 | } | |
913 | ||
914 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
915 | ||
916 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 917 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
918 | if (ret) { |
919 | mlog_errno(ret); | |
920 | goto out_commit; | |
921 | } | |
922 | ||
923 | ret = ocfs2_journal_access(handle, | |
924 | inode, | |
925 | bh, | |
926 | OCFS2_JOURNAL_ACCESS_WRITE); | |
927 | if (ret < 0) { | |
928 | mlog_errno(ret); | |
929 | goto out_commit; | |
930 | } | |
931 | ||
932 | cp_len = value_len > blocksize ? blocksize : value_len; | |
933 | memcpy(bh->b_data, value, cp_len); | |
934 | value_len -= cp_len; | |
935 | value += cp_len; | |
936 | if (cp_len < blocksize) | |
937 | memset(bh->b_data + cp_len, 0, | |
938 | blocksize - cp_len); | |
939 | ||
940 | ret = ocfs2_journal_dirty(handle, bh); | |
941 | if (ret < 0) { | |
942 | mlog_errno(ret); | |
943 | goto out_commit; | |
944 | } | |
945 | brelse(bh); | |
946 | bh = NULL; | |
947 | ||
948 | /* | |
949 | * XXX: do we need to empty all the following | |
950 | * blocks in this cluster? | |
951 | */ | |
952 | if (!value_len) | |
953 | break; | |
954 | } | |
955 | cpos += num_clusters; | |
956 | } | |
957 | out_commit: | |
958 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
959 | out: | |
960 | brelse(bh); | |
961 | ||
962 | return ret; | |
963 | } | |
964 | ||
965 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
966 | struct ocfs2_xattr_info *xi, | |
967 | struct ocfs2_xattr_search *xs, | |
968 | size_t offs) | |
969 | { | |
970 | handle_t *handle = NULL; | |
971 | int ret = 0; | |
972 | size_t name_len = strlen(xi->name); | |
973 | void *val = xs->base + offs; | |
974 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
975 | ||
976 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
977 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
978 | if (IS_ERR(handle)) { | |
979 | ret = PTR_ERR(handle); | |
980 | mlog_errno(ret); | |
981 | goto out; | |
982 | } | |
983 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
984 | OCFS2_JOURNAL_ACCESS_WRITE); | |
985 | if (ret) { | |
986 | mlog_errno(ret); | |
987 | goto out_commit; | |
988 | } | |
989 | /* Decrease xattr count */ | |
990 | le16_add_cpu(&xs->header->xh_count, -1); | |
991 | /* Remove the xattr entry and tree root which has already be set*/ | |
992 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
993 | memset(val, 0, size); | |
994 | ||
995 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
996 | if (ret < 0) | |
997 | mlog_errno(ret); | |
998 | out_commit: | |
999 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1000 | out: | |
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
1005 | struct ocfs2_xattr_info *xi, | |
1006 | struct ocfs2_xattr_search *xs, | |
1007 | size_t offs) | |
1008 | { | |
1009 | handle_t *handle = NULL; | |
1010 | int ret = 0; | |
1011 | ||
1012 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1013 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1014 | if (IS_ERR(handle)) { | |
1015 | ret = PTR_ERR(handle); | |
1016 | mlog_errno(ret); | |
1017 | goto out; | |
1018 | } | |
1019 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1020 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1021 | if (ret) { | |
1022 | mlog_errno(ret); | |
1023 | goto out_commit; | |
1024 | } | |
1025 | ||
1026 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1027 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1028 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1029 | ocfs2_xattr_set_local(xs->here, 1); | |
1030 | else | |
1031 | ocfs2_xattr_set_local(xs->here, 0); | |
1032 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1033 | ||
1034 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1035 | if (ret < 0) | |
1036 | mlog_errno(ret); | |
1037 | out_commit: | |
1038 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1039 | out: | |
1040 | return ret; | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * ocfs2_xattr_set_value_outside() | |
1045 | * | |
1046 | * Set large size value in B tree. | |
1047 | */ | |
1048 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1049 | struct ocfs2_xattr_info *xi, | |
1050 | struct ocfs2_xattr_search *xs, | |
1051 | size_t offs) | |
1052 | { | |
1053 | size_t name_len = strlen(xi->name); | |
1054 | void *val = xs->base + offs; | |
1055 | struct ocfs2_xattr_value_root *xv = NULL; | |
1056 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1057 | int ret = 0; | |
1058 | ||
1059 | memset(val, 0, size); | |
1060 | memcpy(val, xi->name, name_len); | |
1061 | xv = (struct ocfs2_xattr_value_root *) | |
1062 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1063 | xv->xr_clusters = 0; | |
1064 | xv->xr_last_eb_blk = 0; | |
1065 | xv->xr_list.l_tree_depth = 0; | |
1066 | xv->xr_list.l_count = cpu_to_le16(1); | |
1067 | xv->xr_list.l_next_free_rec = 0; | |
1068 | ||
1069 | ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
1070 | xi->value_len); | |
1071 | if (ret < 0) { | |
1072 | mlog_errno(ret); | |
1073 | return ret; | |
1074 | } | |
1075 | ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, | |
1076 | xi->value_len); | |
1077 | if (ret < 0) { | |
1078 | mlog_errno(ret); | |
1079 | return ret; | |
1080 | } | |
1081 | ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); | |
1082 | if (ret < 0) | |
1083 | mlog_errno(ret); | |
1084 | ||
1085 | return ret; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * ocfs2_xattr_set_entry_local() | |
1090 | * | |
1091 | * Set, replace or remove extended attribute in local. | |
1092 | */ | |
1093 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1094 | struct ocfs2_xattr_info *xi, | |
1095 | struct ocfs2_xattr_search *xs, | |
1096 | struct ocfs2_xattr_entry *last, | |
1097 | size_t min_offs) | |
1098 | { | |
1099 | size_t name_len = strlen(xi->name); | |
1100 | int i; | |
1101 | ||
1102 | if (xi->value && xs->not_found) { | |
1103 | /* Insert the new xattr entry. */ | |
1104 | le16_add_cpu(&xs->header->xh_count, 1); | |
1105 | ocfs2_xattr_set_type(last, xi->name_index); | |
1106 | ocfs2_xattr_set_local(last, 1); | |
1107 | last->xe_name_len = name_len; | |
1108 | } else { | |
1109 | void *first_val; | |
1110 | void *val; | |
1111 | size_t offs, size; | |
1112 | ||
1113 | first_val = xs->base + min_offs; | |
1114 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1115 | val = xs->base + offs; | |
1116 | ||
1117 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1118 | OCFS2_XATTR_INLINE_SIZE) | |
1119 | size = OCFS2_XATTR_SIZE(name_len) + | |
1120 | OCFS2_XATTR_ROOT_SIZE; | |
1121 | else | |
1122 | size = OCFS2_XATTR_SIZE(name_len) + | |
1123 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1124 | ||
1125 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1126 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1127 | /* The old and the new value have the | |
1128 | same size. Just replace the value. */ | |
1129 | ocfs2_xattr_set_local(xs->here, 1); | |
1130 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1131 | /* Clear value bytes. */ | |
1132 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1133 | 0, | |
1134 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1135 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1136 | xi->value, | |
1137 | xi->value_len); | |
1138 | return; | |
1139 | } | |
1140 | /* Remove the old name+value. */ | |
1141 | memmove(first_val + size, first_val, val - first_val); | |
1142 | memset(first_val, 0, size); | |
1143 | xs->here->xe_name_hash = 0; | |
1144 | xs->here->xe_name_offset = 0; | |
1145 | ocfs2_xattr_set_local(xs->here, 1); | |
1146 | xs->here->xe_value_size = 0; | |
1147 | ||
1148 | min_offs += size; | |
1149 | ||
1150 | /* Adjust all value offsets. */ | |
1151 | last = xs->header->xh_entries; | |
1152 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1153 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1154 | ||
1155 | if (o < offs) | |
1156 | last->xe_name_offset = cpu_to_le16(o + size); | |
1157 | last += 1; | |
1158 | } | |
1159 | ||
1160 | if (!xi->value) { | |
1161 | /* Remove the old entry. */ | |
1162 | last -= 1; | |
1163 | memmove(xs->here, xs->here + 1, | |
1164 | (void *)last - (void *)xs->here); | |
1165 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1166 | le16_add_cpu(&xs->header->xh_count, -1); | |
1167 | } | |
1168 | } | |
1169 | if (xi->value) { | |
1170 | /* Insert the new name+value. */ | |
1171 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1172 | OCFS2_XATTR_SIZE(xi->value_len); | |
1173 | void *val = xs->base + min_offs - size; | |
1174 | ||
1175 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1176 | memset(val, 0, size); | |
1177 | memcpy(val, xi->name, name_len); | |
1178 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1179 | xi->value, | |
1180 | xi->value_len); | |
1181 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1182 | ocfs2_xattr_set_local(xs->here, 1); | |
1183 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1184 | } | |
1185 | ||
1186 | return; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * ocfs2_xattr_set_entry() | |
1191 | * | |
1192 | * Set extended attribute entry into inode or block. | |
1193 | * | |
1194 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1195 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1196 | * then set value in B tree with set_value_outside(). | |
1197 | */ | |
1198 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1199 | struct ocfs2_xattr_info *xi, | |
1200 | struct ocfs2_xattr_search *xs, | |
1201 | int flag) | |
1202 | { | |
1203 | struct ocfs2_xattr_entry *last; | |
1204 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1205 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1206 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1207 | size_t size_l = 0; | |
1208 | handle_t *handle = NULL; | |
1209 | int free, i, ret; | |
1210 | struct ocfs2_xattr_info xi_l = { | |
1211 | .name_index = xi->name_index, | |
1212 | .name = xi->name, | |
1213 | .value = xi->value, | |
1214 | .value_len = xi->value_len, | |
1215 | }; | |
1216 | ||
1217 | /* Compute min_offs, last and free space. */ | |
1218 | last = xs->header->xh_entries; | |
1219 | ||
1220 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1221 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1222 | if (offs < min_offs) | |
1223 | min_offs = offs; | |
1224 | last += 1; | |
1225 | } | |
1226 | ||
1227 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1228 | if (free < 0) | |
b37c4d84 | 1229 | return -EIO; |
cf1d6c76 TY |
1230 | |
1231 | if (!xs->not_found) { | |
1232 | size_t size = 0; | |
1233 | if (ocfs2_xattr_is_local(xs->here)) | |
1234 | size = OCFS2_XATTR_SIZE(name_len) + | |
1235 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1236 | else | |
1237 | size = OCFS2_XATTR_SIZE(name_len) + | |
1238 | OCFS2_XATTR_ROOT_SIZE; | |
1239 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1240 | } | |
1241 | /* Check free space in inode or block */ | |
1242 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1243 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1244 | OCFS2_XATTR_SIZE(name_len) + | |
1245 | OCFS2_XATTR_ROOT_SIZE) { | |
1246 | ret = -ENOSPC; | |
1247 | goto out; | |
1248 | } | |
1249 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1250 | xi_l.value = (void *)&def_xv; | |
1251 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1252 | } else if (xi->value) { | |
1253 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1254 | OCFS2_XATTR_SIZE(name_len) + | |
1255 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1256 | ret = -ENOSPC; | |
1257 | goto out; | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | if (!xs->not_found) { | |
1262 | /* For existing extended attribute */ | |
1263 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1264 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1265 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1266 | void *val = xs->base + offs; | |
1267 | ||
1268 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1269 | /* Replace existing local xattr with tree root */ | |
1270 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
1271 | offs); | |
1272 | if (ret < 0) | |
1273 | mlog_errno(ret); | |
1274 | goto out; | |
1275 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1276 | /* For existing xattr which has value outside */ | |
1277 | struct ocfs2_xattr_value_root *xv = NULL; | |
1278 | xv = (struct ocfs2_xattr_value_root *)(val + | |
1279 | OCFS2_XATTR_SIZE(name_len)); | |
1280 | ||
1281 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1282 | /* | |
1283 | * If new value need set outside also, | |
1284 | * first truncate old value to new value, | |
1285 | * then set new value with set_value_outside(). | |
1286 | */ | |
1287 | ret = ocfs2_xattr_value_truncate(inode, | |
1288 | xs->xattr_bh, | |
1289 | xv, | |
1290 | xi->value_len); | |
1291 | if (ret < 0) { | |
1292 | mlog_errno(ret); | |
1293 | goto out; | |
1294 | } | |
1295 | ||
1296 | ret = __ocfs2_xattr_set_value_outside(inode, | |
1297 | xv, | |
1298 | xi->value, | |
1299 | xi->value_len); | |
1300 | if (ret < 0) { | |
1301 | mlog_errno(ret); | |
1302 | goto out; | |
1303 | } | |
1304 | ||
1305 | ret = ocfs2_xattr_update_entry(inode, | |
1306 | xi, | |
1307 | xs, | |
1308 | offs); | |
1309 | if (ret < 0) | |
1310 | mlog_errno(ret); | |
1311 | goto out; | |
1312 | } else { | |
1313 | /* | |
1314 | * If new value need set in local, | |
1315 | * just trucate old value to zero. | |
1316 | */ | |
1317 | ret = ocfs2_xattr_value_truncate(inode, | |
1318 | xs->xattr_bh, | |
1319 | xv, | |
1320 | 0); | |
1321 | if (ret < 0) | |
1322 | mlog_errno(ret); | |
1323 | } | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1328 | OCFS2_INODE_UPDATE_CREDITS); | |
1329 | if (IS_ERR(handle)) { | |
1330 | ret = PTR_ERR(handle); | |
1331 | mlog_errno(ret); | |
1332 | goto out; | |
1333 | } | |
1334 | ||
1335 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1336 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1337 | if (ret) { | |
1338 | mlog_errno(ret); | |
1339 | goto out_commit; | |
1340 | } | |
1341 | ||
1342 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
28b8ca0b | 1343 | /* set extended attribute in external block. */ |
cf1d6c76 | 1344 | ret = ocfs2_extend_trans(handle, |
28b8ca0b | 1345 | OCFS2_INODE_UPDATE_CREDITS + |
cf1d6c76 TY |
1346 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); |
1347 | if (ret) { | |
1348 | mlog_errno(ret); | |
1349 | goto out_commit; | |
1350 | } | |
1351 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1352 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1353 | if (ret) { | |
1354 | mlog_errno(ret); | |
1355 | goto out_commit; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * Set value in local, include set tree root in local. | |
1361 | * This is the first step for value size >INLINE_SIZE. | |
1362 | */ | |
1363 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1364 | ||
1365 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1366 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1367 | if (ret < 0) { | |
1368 | mlog_errno(ret); | |
1369 | goto out_commit; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1374 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1375 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1376 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1377 | ||
1378 | /* | |
1379 | * Adjust extent record count or inline data size | |
1380 | * to reserve space for extended attribute. | |
1381 | */ | |
1382 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1383 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1384 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1385 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1386 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1387 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1388 | sizeof(struct ocfs2_extent_rec))); | |
1389 | } | |
1390 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1391 | } | |
1392 | /* Update xattr flag */ | |
1393 | spin_lock(&oi->ip_lock); | |
1394 | oi->ip_dyn_features |= flag; | |
1395 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1396 | spin_unlock(&oi->ip_lock); | |
1397 | /* Update inode ctime */ | |
1398 | inode->i_ctime = CURRENT_TIME; | |
1399 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1400 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1401 | ||
1402 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1403 | if (ret < 0) | |
1404 | mlog_errno(ret); | |
1405 | ||
1406 | out_commit: | |
1407 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1408 | ||
1409 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1410 | /* | |
1411 | * Set value outside in B tree. | |
1412 | * This is the second step for value size > INLINE_SIZE. | |
1413 | */ | |
1414 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1415 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs); | |
1416 | if (ret < 0) { | |
1417 | int ret2; | |
1418 | ||
1419 | mlog_errno(ret); | |
1420 | /* | |
1421 | * If set value outside failed, we have to clean | |
1422 | * the junk tree root we have already set in local. | |
1423 | */ | |
1424 | ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs); | |
1425 | if (ret2 < 0) | |
1426 | mlog_errno(ret2); | |
1427 | } | |
1428 | } | |
1429 | out: | |
1430 | return ret; | |
1431 | ||
1432 | } | |
1433 | ||
cf1d6c76 TY |
1434 | static int ocfs2_remove_value_outside(struct inode*inode, |
1435 | struct buffer_head *bh, | |
1436 | struct ocfs2_xattr_header *header) | |
1437 | { | |
1438 | int ret = 0, i; | |
1439 | ||
1440 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1441 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1442 | ||
1443 | if (!ocfs2_xattr_is_local(entry)) { | |
1444 | struct ocfs2_xattr_value_root *xv; | |
1445 | void *val; | |
1446 | ||
1447 | val = (void *)header + | |
1448 | le16_to_cpu(entry->xe_name_offset); | |
1449 | xv = (struct ocfs2_xattr_value_root *) | |
1450 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1451 | ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0); | |
1452 | if (ret < 0) { | |
1453 | mlog_errno(ret); | |
1454 | return ret; | |
1455 | } | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | return ret; | |
1460 | } | |
1461 | ||
1462 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1463 | struct buffer_head *di_bh) | |
1464 | { | |
1465 | ||
1466 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1467 | struct ocfs2_xattr_header *header; | |
1468 | int ret; | |
1469 | ||
1470 | header = (struct ocfs2_xattr_header *) | |
1471 | ((void *)di + inode->i_sb->s_blocksize - | |
1472 | le16_to_cpu(di->i_xattr_inline_size)); | |
1473 | ||
1474 | ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1475 | ||
1476 | return ret; | |
1477 | } | |
1478 | ||
1479 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1480 | struct buffer_head *blk_bh) | |
1481 | { | |
1482 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 TY |
1483 | int ret = 0; |
1484 | ||
1485 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1486 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1487 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
1488 | ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1489 | } else | |
1490 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1491 | |
1492 | return ret; | |
1493 | } | |
1494 | ||
08413899 TM |
1495 | static int ocfs2_xattr_free_block(struct inode *inode, |
1496 | u64 block) | |
1497 | { | |
1498 | struct inode *xb_alloc_inode; | |
1499 | struct buffer_head *xb_alloc_bh = NULL; | |
1500 | struct buffer_head *blk_bh = NULL; | |
1501 | struct ocfs2_xattr_block *xb; | |
1502 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1503 | handle_t *handle; | |
1504 | int ret = 0; | |
1505 | u64 blk, bg_blkno; | |
1506 | u16 bit; | |
1507 | ||
0fcaa56a | 1508 | ret = ocfs2_read_block(inode, block, &blk_bh); |
08413899 TM |
1509 | if (ret < 0) { |
1510 | mlog_errno(ret); | |
1511 | goto out; | |
1512 | } | |
1513 | ||
f6087fb7 JB |
1514 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
1515 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
1516 | ret = -EIO; | |
08413899 TM |
1517 | goto out; |
1518 | } | |
1519 | ||
1520 | ret = ocfs2_xattr_block_remove(inode, blk_bh); | |
1521 | if (ret < 0) { | |
1522 | mlog_errno(ret); | |
1523 | goto out; | |
1524 | } | |
1525 | ||
08413899 TM |
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 | } | |
f6087fb7 JB |
1769 | |
1770 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1771 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
1772 | ret = -EIO; | |
1773 | goto cleanup; | |
cf1d6c76 TY |
1774 | } |
1775 | ||
1776 | xs->xattr_bh = blk_bh; | |
589dc260 TM |
1777 | |
1778 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1779 | xs->header = &xb->xb_attrs.xb_header; | |
1780 | xs->base = (void *)xs->header; | |
1781 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
1782 | xs->here = xs->header->xh_entries; | |
1783 | ||
1784 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1785 | } else | |
1786 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
1787 | name_index, | |
1788 | name, xs); | |
cf1d6c76 | 1789 | |
cf1d6c76 TY |
1790 | if (ret && ret != -ENODATA) { |
1791 | xs->xattr_bh = NULL; | |
1792 | goto cleanup; | |
1793 | } | |
1794 | xs->not_found = ret; | |
1795 | return 0; | |
cf1d6c76 TY |
1796 | cleanup: |
1797 | brelse(blk_bh); | |
1798 | ||
1799 | return ret; | |
1800 | } | |
1801 | ||
1802 | /* | |
1803 | * ocfs2_xattr_block_set() | |
1804 | * | |
1805 | * Set, replace or remove an extended attribute into external block. | |
1806 | * | |
1807 | */ | |
1808 | static int ocfs2_xattr_block_set(struct inode *inode, | |
1809 | struct ocfs2_xattr_info *xi, | |
1810 | struct ocfs2_xattr_search *xs) | |
1811 | { | |
1812 | struct buffer_head *new_bh = NULL; | |
1813 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1814 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1815 | struct ocfs2_alloc_context *meta_ac = NULL; | |
1816 | handle_t *handle = NULL; | |
1817 | struct ocfs2_xattr_block *xblk = NULL; | |
1818 | u16 suballoc_bit_start; | |
1819 | u32 num_got; | |
1820 | u64 first_blkno; | |
1821 | int ret; | |
1822 | ||
1823 | if (!xs->xattr_bh) { | |
1824 | /* | |
1825 | * Alloc one external block for extended attribute | |
1826 | * outside of inode. | |
1827 | */ | |
1828 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
1829 | if (ret < 0) { | |
1830 | mlog_errno(ret); | |
1831 | goto out; | |
1832 | } | |
1833 | handle = ocfs2_start_trans(osb, | |
1834 | OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
1835 | if (IS_ERR(handle)) { | |
1836 | ret = PTR_ERR(handle); | |
1837 | mlog_errno(ret); | |
1838 | goto out; | |
1839 | } | |
1840 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1841 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1842 | if (ret < 0) { | |
1843 | mlog_errno(ret); | |
1844 | goto out_commit; | |
1845 | } | |
1846 | ||
1847 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
1848 | &suballoc_bit_start, &num_got, | |
1849 | &first_blkno); | |
1850 | if (ret < 0) { | |
1851 | mlog_errno(ret); | |
1852 | goto out_commit; | |
1853 | } | |
1854 | ||
1855 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
1856 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
1857 | ||
1858 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
1859 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1860 | if (ret < 0) { | |
1861 | mlog_errno(ret); | |
1862 | goto out_commit; | |
1863 | } | |
1864 | ||
1865 | /* Initialize ocfs2_xattr_block */ | |
1866 | xs->xattr_bh = new_bh; | |
1867 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
1868 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
1869 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
1870 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
1871 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
1872 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
1873 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
1874 | ||
1875 | xs->header = &xblk->xb_attrs.xb_header; | |
1876 | xs->base = (void *)xs->header; | |
1877 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
1878 | xs->here = xs->header->xh_entries; | |
1879 | ||
1880 | ||
1881 | ret = ocfs2_journal_dirty(handle, new_bh); | |
1882 | if (ret < 0) { | |
1883 | mlog_errno(ret); | |
1884 | goto out_commit; | |
1885 | } | |
1886 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
1887 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1888 | if (ret < 0) | |
1889 | mlog_errno(ret); | |
1890 | out_commit: | |
1891 | ocfs2_commit_trans(osb, handle); | |
1892 | out: | |
1893 | if (meta_ac) | |
1894 | ocfs2_free_alloc_context(meta_ac); | |
1895 | if (ret < 0) | |
1896 | return ret; | |
01225596 TM |
1897 | } else |
1898 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
1899 | ||
1900 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1901 | /* Set extended attribute into external block */ | |
1902 | ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL); | |
1903 | if (!ret || ret != -ENOSPC) | |
1904 | goto end; | |
1905 | ||
1906 | ret = ocfs2_xattr_create_index_block(inode, xs); | |
1907 | if (ret) | |
1908 | goto end; | |
cf1d6c76 TY |
1909 | } |
1910 | ||
01225596 | 1911 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs); |
01225596 TM |
1912 | |
1913 | end: | |
cf1d6c76 TY |
1914 | |
1915 | return ret; | |
1916 | } | |
1917 | ||
1918 | /* | |
1919 | * ocfs2_xattr_set() | |
1920 | * | |
1921 | * Set, replace or remove an extended attribute for this inode. | |
1922 | * value is NULL to remove an existing extended attribute, else either | |
1923 | * create or replace an extended attribute. | |
1924 | */ | |
1925 | int ocfs2_xattr_set(struct inode *inode, | |
1926 | int name_index, | |
1927 | const char *name, | |
1928 | const void *value, | |
1929 | size_t value_len, | |
1930 | int flags) | |
1931 | { | |
1932 | struct buffer_head *di_bh = NULL; | |
1933 | struct ocfs2_dinode *di; | |
1934 | int ret; | |
01225596 | 1935 | u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
cf1d6c76 TY |
1936 | |
1937 | struct ocfs2_xattr_info xi = { | |
1938 | .name_index = name_index, | |
1939 | .name = name, | |
1940 | .value = value, | |
1941 | .value_len = value_len, | |
1942 | }; | |
1943 | ||
1944 | struct ocfs2_xattr_search xis = { | |
1945 | .not_found = -ENODATA, | |
1946 | }; | |
1947 | ||
1948 | struct ocfs2_xattr_search xbs = { | |
1949 | .not_found = -ENODATA, | |
1950 | }; | |
1951 | ||
8154da3d TY |
1952 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1953 | return -EOPNOTSUPP; | |
1954 | ||
cf1d6c76 TY |
1955 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
1956 | if (ret < 0) { | |
1957 | mlog_errno(ret); | |
1958 | return ret; | |
1959 | } | |
1960 | xis.inode_bh = xbs.inode_bh = di_bh; | |
1961 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1962 | ||
1963 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
1964 | /* | |
1965 | * Scan inode and external block to find the same name | |
1966 | * extended attribute and collect search infomation. | |
1967 | */ | |
1968 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
1969 | if (ret) | |
1970 | goto cleanup; | |
1971 | if (xis.not_found) { | |
1972 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
1973 | if (ret) | |
1974 | goto cleanup; | |
1975 | } | |
1976 | ||
1977 | if (xis.not_found && xbs.not_found) { | |
1978 | ret = -ENODATA; | |
1979 | if (flags & XATTR_REPLACE) | |
1980 | goto cleanup; | |
1981 | ret = 0; | |
1982 | if (!value) | |
1983 | goto cleanup; | |
1984 | } else { | |
1985 | ret = -EEXIST; | |
1986 | if (flags & XATTR_CREATE) | |
1987 | goto cleanup; | |
1988 | } | |
1989 | ||
1990 | if (!value) { | |
1991 | /* Remove existing extended attribute */ | |
1992 | if (!xis.not_found) | |
1993 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
1994 | else if (!xbs.not_found) | |
1995 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
1996 | } else { | |
1997 | /* We always try to set extended attribute into inode first*/ | |
1998 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
1999 | if (!ret && !xbs.not_found) { | |
2000 | /* | |
2001 | * If succeed and that extended attribute existing in | |
2002 | * external block, then we will remove it. | |
2003 | */ | |
2004 | xi.value = NULL; | |
2005 | xi.value_len = 0; | |
2006 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2007 | } else if (ret == -ENOSPC) { | |
2008 | if (di->i_xattr_loc && !xbs.xattr_bh) { | |
2009 | ret = ocfs2_xattr_block_find(inode, name_index, | |
2010 | name, &xbs); | |
2011 | if (ret) | |
2012 | goto cleanup; | |
2013 | } | |
2014 | /* | |
2015 | * If no space in inode, we will set extended attribute | |
2016 | * into external block. | |
2017 | */ | |
2018 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2019 | if (ret) | |
2020 | goto cleanup; | |
2021 | if (!xis.not_found) { | |
2022 | /* | |
2023 | * If succeed and that extended attribute | |
2024 | * existing in inode, we will remove it. | |
2025 | */ | |
2026 | xi.value = NULL; | |
2027 | xi.value_len = 0; | |
2028 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2029 | } | |
2030 | } | |
2031 | } | |
2032 | cleanup: | |
2033 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2034 | ocfs2_inode_unlock(inode, 1); | |
2035 | brelse(di_bh); | |
2036 | brelse(xbs.xattr_bh); | |
01225596 | 2037 | for (i = 0; i < blk_per_bucket; i++) |
4ac6032d | 2038 | brelse(xbs.bucket.bu_bhs[i]); |
cf1d6c76 TY |
2039 | |
2040 | return ret; | |
2041 | } | |
2042 | ||
0c044f0b TM |
2043 | /* |
2044 | * Find the xattr extent rec which may contains name_hash. | |
2045 | * e_cpos will be the first name hash of the xattr rec. | |
2046 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2047 | */ | |
2048 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2049 | u32 name_hash, | |
2050 | u64 *p_blkno, | |
2051 | u32 *e_cpos, | |
2052 | u32 *num_clusters, | |
2053 | struct ocfs2_extent_list *el) | |
2054 | { | |
2055 | int ret = 0, i; | |
2056 | struct buffer_head *eb_bh = NULL; | |
2057 | struct ocfs2_extent_block *eb; | |
2058 | struct ocfs2_extent_rec *rec = NULL; | |
2059 | u64 e_blkno = 0; | |
2060 | ||
2061 | if (el->l_tree_depth) { | |
2062 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2063 | if (ret) { | |
2064 | mlog_errno(ret); | |
2065 | goto out; | |
2066 | } | |
2067 | ||
2068 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2069 | el = &eb->h_list; | |
2070 | ||
2071 | if (el->l_tree_depth) { | |
2072 | ocfs2_error(inode->i_sb, | |
2073 | "Inode %lu has non zero tree depth in " | |
2074 | "xattr tree block %llu\n", inode->i_ino, | |
2075 | (unsigned long long)eb_bh->b_blocknr); | |
2076 | ret = -EROFS; | |
2077 | goto out; | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2082 | rec = &el->l_recs[i]; | |
2083 | ||
2084 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2085 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2086 | break; | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | if (!e_blkno) { | |
2091 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2092 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2093 | le32_to_cpu(rec->e_cpos), | |
2094 | ocfs2_rec_clusters(el, rec)); | |
2095 | ret = -EROFS; | |
2096 | goto out; | |
2097 | } | |
2098 | ||
2099 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2100 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2101 | if (e_cpos) | |
2102 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2103 | out: | |
2104 | brelse(eb_bh); | |
2105 | return ret; | |
2106 | } | |
2107 | ||
2108 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2109 | struct ocfs2_xattr_bucket *bucket, | |
2110 | void *para); | |
2111 | ||
589dc260 TM |
2112 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
2113 | struct buffer_head *header_bh, | |
2114 | int name_index, | |
2115 | const char *name, | |
2116 | u32 name_hash, | |
2117 | u16 *xe_index, | |
2118 | int *found) | |
2119 | { | |
2120 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
2121 | struct ocfs2_xattr_header *xh = | |
2122 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
2123 | size_t name_len = strlen(name); | |
2124 | struct ocfs2_xattr_entry *xe = NULL; | |
2125 | struct buffer_head *name_bh = NULL; | |
2126 | char *xe_name; | |
2127 | ||
2128 | /* | |
2129 | * We don't use binary search in the bucket because there | |
2130 | * may be multiple entries with the same name hash. | |
2131 | */ | |
2132 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2133 | xe = &xh->xh_entries[i]; | |
2134 | ||
2135 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2136 | continue; | |
2137 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2138 | break; | |
2139 | ||
2140 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2141 | if (!cmp) | |
2142 | cmp = name_len - xe->xe_name_len; | |
2143 | if (cmp) | |
2144 | continue; | |
2145 | ||
2146 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2147 | xh, | |
2148 | i, | |
2149 | &block_off, | |
2150 | &new_offset); | |
2151 | if (ret) { | |
2152 | mlog_errno(ret); | |
2153 | break; | |
2154 | } | |
2155 | ||
0fcaa56a JB |
2156 | ret = ocfs2_read_block(inode, header_bh->b_blocknr + block_off, |
2157 | &name_bh); | |
589dc260 TM |
2158 | if (ret) { |
2159 | mlog_errno(ret); | |
2160 | break; | |
2161 | } | |
2162 | xe_name = name_bh->b_data + new_offset; | |
2163 | ||
2164 | cmp = memcmp(name, xe_name, name_len); | |
2165 | brelse(name_bh); | |
2166 | name_bh = NULL; | |
2167 | ||
2168 | if (cmp == 0) { | |
2169 | *xe_index = i; | |
2170 | *found = 1; | |
2171 | ret = 0; | |
2172 | break; | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | return ret; | |
2177 | } | |
2178 | ||
2179 | /* | |
2180 | * Find the specified xattr entry in a series of buckets. | |
2181 | * This series start from p_blkno and last for num_clusters. | |
2182 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2183 | * the num of the valid buckets. | |
2184 | * | |
2185 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2186 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2187 | */ | |
2188 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2189 | int name_index, | |
2190 | const char *name, | |
2191 | u32 name_hash, | |
2192 | u64 p_blkno, | |
2193 | u32 first_hash, | |
2194 | u32 num_clusters, | |
2195 | struct ocfs2_xattr_search *xs) | |
2196 | { | |
2197 | int ret, found = 0; | |
2198 | struct buffer_head *bh = NULL; | |
2199 | struct buffer_head *lower_bh = NULL; | |
2200 | struct ocfs2_xattr_header *xh = NULL; | |
2201 | struct ocfs2_xattr_entry *xe = NULL; | |
2202 | u16 index = 0; | |
2203 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2204 | int low_bucket = 0, bucket, high_bucket; | |
2205 | u32 last_hash; | |
2206 | u64 blkno; | |
2207 | ||
0fcaa56a | 2208 | ret = ocfs2_read_block(inode, p_blkno, &bh); |
589dc260 TM |
2209 | if (ret) { |
2210 | mlog_errno(ret); | |
2211 | goto out; | |
2212 | } | |
2213 | ||
2214 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
2215 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; | |
2216 | ||
2217 | while (low_bucket <= high_bucket) { | |
2218 | brelse(bh); | |
2219 | bh = NULL; | |
2220 | bucket = (low_bucket + high_bucket) / 2; | |
2221 | ||
2222 | blkno = p_blkno + bucket * blk_per_bucket; | |
2223 | ||
0fcaa56a | 2224 | ret = ocfs2_read_block(inode, blkno, &bh); |
589dc260 TM |
2225 | if (ret) { |
2226 | mlog_errno(ret); | |
2227 | goto out; | |
2228 | } | |
2229 | ||
2230 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
2231 | xe = &xh->xh_entries[0]; | |
2232 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
2233 | high_bucket = bucket - 1; | |
2234 | continue; | |
2235 | } | |
2236 | ||
2237 | /* | |
2238 | * Check whether the hash of the last entry in our | |
5a095611 TM |
2239 | * bucket is larger than the search one. for an empty |
2240 | * bucket, the last one is also the first one. | |
589dc260 | 2241 | */ |
5a095611 TM |
2242 | if (xh->xh_count) |
2243 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
2244 | ||
589dc260 TM |
2245 | last_hash = le32_to_cpu(xe->xe_name_hash); |
2246 | ||
2247 | /* record lower_bh which may be the insert place. */ | |
2248 | brelse(lower_bh); | |
2249 | lower_bh = bh; | |
2250 | bh = NULL; | |
2251 | ||
2252 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
2253 | low_bucket = bucket + 1; | |
2254 | continue; | |
2255 | } | |
2256 | ||
2257 | /* the searched xattr should reside in this bucket if exists. */ | |
2258 | ret = ocfs2_find_xe_in_bucket(inode, lower_bh, | |
2259 | name_index, name, name_hash, | |
2260 | &index, &found); | |
2261 | if (ret) { | |
2262 | mlog_errno(ret); | |
2263 | goto out; | |
2264 | } | |
2265 | break; | |
2266 | } | |
2267 | ||
2268 | /* | |
2269 | * Record the bucket we have found. | |
2270 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
2271 | * always set it to the previous bucket. | |
2272 | */ | |
2273 | if (!lower_bh) { | |
2274 | /* | |
2275 | * We can't find any bucket whose first name_hash is less | |
2276 | * than the find name_hash. | |
2277 | */ | |
2278 | BUG_ON(bh->b_blocknr != p_blkno); | |
2279 | lower_bh = bh; | |
2280 | bh = NULL; | |
2281 | } | |
4ac6032d | 2282 | xs->bucket.bu_bhs[0] = lower_bh; |
589dc260 TM |
2283 | lower_bh = NULL; |
2284 | ||
3e632946 | 2285 | xs->header = bucket_xh(&xs->bucket); |
51def39f | 2286 | xs->base = bucket_block(&xs->bucket, 0); |
589dc260 TM |
2287 | xs->end = xs->base + inode->i_sb->s_blocksize; |
2288 | ||
2289 | if (found) { | |
2290 | /* | |
2291 | * If we have found the xattr enty, read all the blocks in | |
2292 | * this bucket. | |
2293 | */ | |
9c7759aa | 2294 | ret = ocfs2_read_blocks(inode, bucket_blkno(&xs->bucket) + 1, |
4ac6032d | 2295 | blk_per_bucket - 1, &xs->bucket.bu_bhs[1], |
1efd47f8 | 2296 | 0); |
589dc260 TM |
2297 | if (ret) { |
2298 | mlog_errno(ret); | |
2299 | goto out; | |
2300 | } | |
2301 | ||
2302 | xs->here = &xs->header->xh_entries[index]; | |
2303 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
9c7759aa | 2304 | (unsigned long long)bucket_blkno(&xs->bucket), index); |
589dc260 TM |
2305 | } else |
2306 | ret = -ENODATA; | |
2307 | ||
2308 | out: | |
2309 | brelse(bh); | |
2310 | brelse(lower_bh); | |
2311 | return ret; | |
2312 | } | |
2313 | ||
2314 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
2315 | struct buffer_head *root_bh, | |
2316 | int name_index, | |
2317 | const char *name, | |
2318 | struct ocfs2_xattr_search *xs) | |
2319 | { | |
2320 | int ret; | |
2321 | struct ocfs2_xattr_block *xb = | |
2322 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
2323 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
2324 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
2325 | u64 p_blkno = 0; | |
2326 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 2327 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
2328 | |
2329 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2330 | return -ENODATA; | |
2331 | ||
2332 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
2333 | name, name_hash, name_index); | |
2334 | ||
2335 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
2336 | &num_clusters, el); | |
2337 | if (ret) { | |
2338 | mlog_errno(ret); | |
2339 | goto out; | |
2340 | } | |
2341 | ||
2342 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
2343 | ||
2344 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
2345 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
2346 | first_hash); | |
589dc260 TM |
2347 | |
2348 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
2349 | p_blkno, first_hash, num_clusters, xs); | |
2350 | ||
2351 | out: | |
2352 | return ret; | |
2353 | } | |
2354 | ||
0c044f0b TM |
2355 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
2356 | u64 blkno, | |
2357 | u32 clusters, | |
2358 | xattr_bucket_func *func, | |
2359 | void *para) | |
2360 | { | |
2361 | int i, j, ret = 0; | |
2362 | int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2363 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); | |
2364 | u32 num_buckets = clusters * bpc; | |
2365 | struct ocfs2_xattr_bucket bucket; | |
2366 | ||
2367 | memset(&bucket, 0, sizeof(bucket)); | |
2368 | ||
2369 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 2370 | clusters, (unsigned long long)blkno); |
0c044f0b TM |
2371 | |
2372 | for (i = 0; i < num_buckets; i++, blkno += blk_per_bucket) { | |
31d33073 | 2373 | ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket, |
4ac6032d | 2374 | bucket.bu_bhs, 0); |
0c044f0b TM |
2375 | if (ret) { |
2376 | mlog_errno(ret); | |
2377 | goto out; | |
2378 | } | |
2379 | ||
0c044f0b TM |
2380 | /* |
2381 | * The real bucket num in this series of blocks is stored | |
2382 | * in the 1st bucket. | |
2383 | */ | |
2384 | if (i == 0) | |
3e632946 | 2385 | num_buckets = le16_to_cpu(bucket_xh(&bucket)->xh_num_buckets); |
0c044f0b | 2386 | |
de29c085 MF |
2387 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
2388 | (unsigned long long)blkno, | |
3e632946 | 2389 | le32_to_cpu(bucket_xh(&bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b TM |
2390 | if (func) { |
2391 | ret = func(inode, &bucket, para); | |
2392 | if (ret) { | |
2393 | mlog_errno(ret); | |
2394 | break; | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | for (j = 0; j < blk_per_bucket; j++) | |
4ac6032d | 2399 | brelse(bucket.bu_bhs[j]); |
0c044f0b TM |
2400 | memset(&bucket, 0, sizeof(bucket)); |
2401 | } | |
2402 | ||
2403 | out: | |
2404 | for (j = 0; j < blk_per_bucket; j++) | |
4ac6032d | 2405 | brelse(bucket.bu_bhs[j]); |
0c044f0b TM |
2406 | |
2407 | return ret; | |
2408 | } | |
2409 | ||
2410 | struct ocfs2_xattr_tree_list { | |
2411 | char *buffer; | |
2412 | size_t buffer_size; | |
936b8834 | 2413 | size_t result; |
0c044f0b TM |
2414 | }; |
2415 | ||
2416 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
2417 | struct ocfs2_xattr_header *xh, | |
2418 | int index, | |
2419 | int *block_off, | |
2420 | int *new_offset) | |
2421 | { | |
2422 | u16 name_offset; | |
2423 | ||
2424 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
2425 | return -EINVAL; | |
2426 | ||
2427 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
2428 | ||
2429 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
2430 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
2431 | ||
2432 | return 0; | |
2433 | } | |
2434 | ||
2435 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
2436 | struct ocfs2_xattr_bucket *bucket, | |
2437 | void *para) | |
2438 | { | |
936b8834 | 2439 | int ret = 0, type; |
0c044f0b | 2440 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 2441 | int i, block_off, new_offset; |
936b8834 | 2442 | const char *prefix, *name; |
0c044f0b | 2443 | |
3e632946 JB |
2444 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
2445 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
2446 | type = ocfs2_xattr_get_type(entry); |
2447 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 2448 | |
936b8834 | 2449 | if (prefix) { |
0c044f0b | 2450 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 2451 | bucket_xh(bucket), |
0c044f0b TM |
2452 | i, |
2453 | &block_off, | |
2454 | &new_offset); | |
2455 | if (ret) | |
2456 | break; | |
936b8834 | 2457 | |
51def39f | 2458 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
2459 | new_offset; |
2460 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
2461 | xl->buffer_size, | |
2462 | &xl->result, | |
2463 | prefix, name, | |
2464 | entry->xe_name_len); | |
2465 | if (ret) | |
2466 | break; | |
0c044f0b TM |
2467 | } |
2468 | } | |
2469 | ||
2470 | return ret; | |
2471 | } | |
2472 | ||
2473 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
2474 | struct ocfs2_xattr_tree_root *xt, | |
2475 | char *buffer, | |
2476 | size_t buffer_size) | |
2477 | { | |
2478 | struct ocfs2_extent_list *el = &xt->xt_list; | |
2479 | int ret = 0; | |
2480 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
2481 | u64 p_blkno = 0; | |
2482 | struct ocfs2_xattr_tree_list xl = { | |
2483 | .buffer = buffer, | |
2484 | .buffer_size = buffer_size, | |
936b8834 | 2485 | .result = 0, |
0c044f0b TM |
2486 | }; |
2487 | ||
2488 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2489 | return 0; | |
2490 | ||
2491 | while (name_hash > 0) { | |
2492 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
2493 | &e_cpos, &num_clusters, el); | |
2494 | if (ret) { | |
2495 | mlog_errno(ret); | |
2496 | goto out; | |
2497 | } | |
2498 | ||
2499 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
2500 | ocfs2_list_xattr_bucket, | |
2501 | &xl); | |
2502 | if (ret) { | |
2503 | mlog_errno(ret); | |
2504 | goto out; | |
2505 | } | |
2506 | ||
2507 | if (e_cpos == 0) | |
2508 | break; | |
2509 | ||
2510 | name_hash = e_cpos - 1; | |
2511 | } | |
2512 | ||
936b8834 | 2513 | ret = xl.result; |
0c044f0b TM |
2514 | out: |
2515 | return ret; | |
2516 | } | |
01225596 TM |
2517 | |
2518 | static int cmp_xe(const void *a, const void *b) | |
2519 | { | |
2520 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2521 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
2522 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
2523 | ||
2524 | if (l_hash > r_hash) | |
2525 | return 1; | |
2526 | if (l_hash < r_hash) | |
2527 | return -1; | |
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | static void swap_xe(void *a, void *b, int size) | |
2532 | { | |
2533 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
2534 | ||
2535 | tmp = *l; | |
2536 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
2537 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
2538 | } | |
2539 | ||
2540 | /* | |
2541 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
2542 | * and all the xattr entries will be moved to the new bucket. | |
2543 | * Note: we need to sort the entries since they are not saved in order | |
2544 | * in the ocfs2_xattr_block. | |
2545 | */ | |
2546 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
2547 | struct buffer_head *xb_bh, | |
2548 | struct buffer_head *xh_bh, | |
2549 | struct buffer_head *data_bh) | |
2550 | { | |
2551 | int i, blocksize = inode->i_sb->s_blocksize; | |
2552 | u16 offset, size, off_change; | |
2553 | struct ocfs2_xattr_entry *xe; | |
2554 | struct ocfs2_xattr_block *xb = | |
2555 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2556 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
2557 | struct ocfs2_xattr_header *xh = | |
2558 | (struct ocfs2_xattr_header *)xh_bh->b_data; | |
2559 | u16 count = le16_to_cpu(xb_xh->xh_count); | |
2560 | char *target = xh_bh->b_data, *src = xb_bh->b_data; | |
2561 | ||
2562 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
2563 | (unsigned long long)xb_bh->b_blocknr, | |
2564 | (unsigned long long)xh_bh->b_blocknr); | |
2565 | ||
2566 | memset(xh_bh->b_data, 0, blocksize); | |
2567 | if (data_bh) | |
2568 | memset(data_bh->b_data, 0, blocksize); | |
2569 | /* | |
2570 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
2571 | * there is a offset change corresponding to the change of | |
2572 | * ocfs2_xattr_header's position. | |
2573 | */ | |
2574 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2575 | xe = &xb_xh->xh_entries[count - 1]; | |
2576 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
2577 | size = blocksize - offset; | |
2578 | ||
2579 | /* copy all the names and values. */ | |
2580 | if (data_bh) | |
2581 | target = data_bh->b_data; | |
2582 | memcpy(target + offset, src + offset, size); | |
2583 | ||
2584 | /* Init new header now. */ | |
2585 | xh->xh_count = xb_xh->xh_count; | |
2586 | xh->xh_num_buckets = cpu_to_le16(1); | |
2587 | xh->xh_name_value_len = cpu_to_le16(size); | |
2588 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
2589 | ||
2590 | /* copy all the entries. */ | |
2591 | target = xh_bh->b_data; | |
2592 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); | |
2593 | size = count * sizeof(struct ocfs2_xattr_entry); | |
2594 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
2595 | ||
2596 | /* Change the xe offset for all the xe because of the move. */ | |
2597 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
2598 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2599 | for (i = 0; i < count; i++) | |
2600 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
2601 | ||
2602 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
2603 | offset, size, off_change); | |
2604 | ||
2605 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
2606 | cmp_xe, swap_xe); | |
2607 | } | |
2608 | ||
2609 | /* | |
2610 | * After we move xattr from block to index btree, we have to | |
2611 | * update ocfs2_xattr_search to the new xe and base. | |
2612 | * | |
2613 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
2614 | * While if the entry is in index b-tree, "bucket" indicates the | |
2615 | * real place of the xattr. | |
2616 | */ | |
2617 | static int ocfs2_xattr_update_xattr_search(struct inode *inode, | |
2618 | struct ocfs2_xattr_search *xs, | |
2619 | struct buffer_head *old_bh, | |
2620 | struct buffer_head *new_bh) | |
2621 | { | |
2622 | int ret = 0; | |
2623 | char *buf = old_bh->b_data; | |
2624 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
2625 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
2626 | int i, blocksize = inode->i_sb->s_blocksize; | |
2627 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2628 | ||
4ac6032d | 2629 | xs->bucket.bu_bhs[0] = new_bh; |
01225596 | 2630 | get_bh(new_bh); |
3e632946 | 2631 | xs->header = bucket_xh(&xs->bucket); |
01225596 TM |
2632 | |
2633 | xs->base = new_bh->b_data; | |
2634 | xs->end = xs->base + inode->i_sb->s_blocksize; | |
2635 | ||
2636 | if (!xs->not_found) { | |
2637 | if (OCFS2_XATTR_BUCKET_SIZE != blocksize) { | |
31d33073 | 2638 | ret = ocfs2_read_blocks(inode, |
9c7759aa | 2639 | bucket_blkno(&xs->bucket) + 1, |
4ac6032d | 2640 | blk_per_bucket - 1, &xs->bucket.bu_bhs[1], |
1efd47f8 | 2641 | 0); |
01225596 TM |
2642 | if (ret) { |
2643 | mlog_errno(ret); | |
2644 | return ret; | |
2645 | } | |
2646 | ||
01225596 | 2647 | } |
83099bc6 TM |
2648 | i = xs->here - old_xh->xh_entries; |
2649 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
2650 | } |
2651 | ||
2652 | return ret; | |
2653 | } | |
2654 | ||
2655 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
2656 | struct ocfs2_xattr_search *xs) | |
2657 | { | |
2658 | int ret, credits = OCFS2_SUBALLOC_ALLOC; | |
2659 | u32 bit_off, len; | |
2660 | u64 blkno; | |
2661 | handle_t *handle; | |
2662 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2663 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2664 | struct ocfs2_alloc_context *data_ac; | |
2665 | struct buffer_head *xh_bh = NULL, *data_bh = NULL; | |
2666 | struct buffer_head *xb_bh = xs->xattr_bh; | |
2667 | struct ocfs2_xattr_block *xb = | |
2668 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2669 | struct ocfs2_xattr_tree_root *xr; | |
2670 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
2671 | u16 bpb = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2672 | ||
2673 | mlog(0, "create xattr index block for %llu\n", | |
2674 | (unsigned long long)xb_bh->b_blocknr); | |
2675 | ||
2676 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
2677 | ||
2678 | ret = ocfs2_reserve_clusters(osb, 1, &data_ac); | |
2679 | if (ret) { | |
2680 | mlog_errno(ret); | |
2681 | goto out; | |
2682 | } | |
2683 | ||
2684 | /* | |
2685 | * XXX: | |
2686 | * We can use this lock for now, and maybe move to a dedicated mutex | |
2687 | * if performance becomes a problem later. | |
2688 | */ | |
2689 | down_write(&oi->ip_alloc_sem); | |
2690 | ||
2691 | /* | |
2692 | * 3 more credits, one for xattr block update, one for the 1st block | |
2693 | * of the new xattr bucket and one for the value/data. | |
2694 | */ | |
2695 | credits += 3; | |
2696 | handle = ocfs2_start_trans(osb, credits); | |
2697 | if (IS_ERR(handle)) { | |
2698 | ret = PTR_ERR(handle); | |
2699 | mlog_errno(ret); | |
2700 | goto out_sem; | |
2701 | } | |
2702 | ||
2703 | ret = ocfs2_journal_access(handle, inode, xb_bh, | |
2704 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2705 | if (ret) { | |
2706 | mlog_errno(ret); | |
2707 | goto out_commit; | |
2708 | } | |
2709 | ||
2710 | ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len); | |
2711 | if (ret) { | |
2712 | mlog_errno(ret); | |
2713 | goto out_commit; | |
2714 | } | |
2715 | ||
2716 | /* | |
2717 | * The bucket may spread in many blocks, and | |
2718 | * we will only touch the 1st block and the last block | |
2719 | * in the whole bucket(one for entry and one for data). | |
2720 | */ | |
2721 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
2722 | ||
de29c085 MF |
2723 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
2724 | (unsigned long long)blkno); | |
01225596 TM |
2725 | |
2726 | xh_bh = sb_getblk(inode->i_sb, blkno); | |
2727 | if (!xh_bh) { | |
2728 | ret = -EIO; | |
2729 | mlog_errno(ret); | |
2730 | goto out_commit; | |
2731 | } | |
2732 | ||
2733 | ocfs2_set_new_buffer_uptodate(inode, xh_bh); | |
2734 | ||
2735 | ret = ocfs2_journal_access(handle, inode, xh_bh, | |
2736 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2737 | if (ret) { | |
2738 | mlog_errno(ret); | |
2739 | goto out_commit; | |
2740 | } | |
2741 | ||
2742 | if (bpb > 1) { | |
2743 | data_bh = sb_getblk(inode->i_sb, blkno + bpb - 1); | |
2744 | if (!data_bh) { | |
2745 | ret = -EIO; | |
2746 | mlog_errno(ret); | |
2747 | goto out_commit; | |
2748 | } | |
2749 | ||
2750 | ocfs2_set_new_buffer_uptodate(inode, data_bh); | |
2751 | ||
2752 | ret = ocfs2_journal_access(handle, inode, data_bh, | |
2753 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2754 | if (ret) { | |
2755 | mlog_errno(ret); | |
2756 | goto out_commit; | |
2757 | } | |
2758 | } | |
2759 | ||
2760 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xh_bh, data_bh); | |
2761 | ||
2762 | ocfs2_journal_dirty(handle, xh_bh); | |
2763 | if (data_bh) | |
2764 | ocfs2_journal_dirty(handle, data_bh); | |
2765 | ||
bd60bd37 JB |
2766 | ret = ocfs2_xattr_update_xattr_search(inode, xs, xb_bh, xh_bh); |
2767 | if (ret) { | |
2768 | mlog_errno(ret); | |
2769 | goto out_commit; | |
2770 | } | |
01225596 TM |
2771 | |
2772 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
2773 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
2774 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
2775 | ||
2776 | xr = &xb->xb_attrs.xb_root; | |
2777 | xr->xt_clusters = cpu_to_le32(1); | |
2778 | xr->xt_last_eb_blk = 0; | |
2779 | xr->xt_list.l_tree_depth = 0; | |
2780 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2781 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2782 | ||
2783 | xr->xt_list.l_recs[0].e_cpos = 0; | |
2784 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
2785 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
2786 | ||
2787 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
2788 | ||
2789 | ret = ocfs2_journal_dirty(handle, xb_bh); | |
2790 | if (ret) { | |
2791 | mlog_errno(ret); | |
2792 | goto out_commit; | |
2793 | } | |
2794 | ||
2795 | out_commit: | |
2796 | ocfs2_commit_trans(osb, handle); | |
2797 | ||
2798 | out_sem: | |
2799 | up_write(&oi->ip_alloc_sem); | |
2800 | ||
2801 | out: | |
2802 | if (data_ac) | |
2803 | ocfs2_free_alloc_context(data_ac); | |
2804 | ||
2805 | brelse(xh_bh); | |
2806 | brelse(data_bh); | |
2807 | ||
2808 | return ret; | |
2809 | } | |
2810 | ||
2811 | static int cmp_xe_offset(const void *a, const void *b) | |
2812 | { | |
2813 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2814 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
2815 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
2816 | ||
2817 | if (l_name_offset < r_name_offset) | |
2818 | return 1; | |
2819 | if (l_name_offset > r_name_offset) | |
2820 | return -1; | |
2821 | return 0; | |
2822 | } | |
2823 | ||
2824 | /* | |
2825 | * defrag a xattr bucket if we find that the bucket has some | |
2826 | * holes beteen name/value pairs. | |
2827 | * We will move all the name/value pairs to the end of the bucket | |
2828 | * so that we can spare some space for insertion. | |
2829 | */ | |
2830 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
2831 | struct ocfs2_xattr_bucket *bucket) | |
2832 | { | |
2833 | int ret, i; | |
2834 | size_t end, offset, len, value_len; | |
2835 | struct ocfs2_xattr_header *xh; | |
2836 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 2837 | u64 blkno = bucket_blkno(bucket); |
01225596 TM |
2838 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2839 | u16 xh_free_start; | |
01225596 TM |
2840 | size_t blocksize = inode->i_sb->s_blocksize; |
2841 | handle_t *handle; | |
2842 | struct buffer_head **bhs; | |
2843 | struct ocfs2_xattr_entry *xe; | |
2844 | ||
2845 | bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
2846 | GFP_NOFS); | |
2847 | if (!bhs) | |
2848 | return -ENOMEM; | |
2849 | ||
1efd47f8 | 2850 | ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket, bhs, 0); |
01225596 TM |
2851 | if (ret) |
2852 | goto out; | |
2853 | ||
2854 | /* | |
2855 | * In order to make the operation more efficient and generic, | |
2856 | * we copy all the blocks into a contiguous memory and do the | |
2857 | * defragment there, so if anything is error, we will not touch | |
2858 | * the real block. | |
2859 | */ | |
2860 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
2861 | if (!bucket_buf) { | |
2862 | ret = -EIO; | |
2863 | goto out; | |
2864 | } | |
2865 | ||
2866 | buf = bucket_buf; | |
2867 | for (i = 0; i < blk_per_bucket; i++, buf += blocksize) | |
2868 | memcpy(buf, bhs[i]->b_data, blocksize); | |
2869 | ||
2870 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), blk_per_bucket); | |
2871 | if (IS_ERR(handle)) { | |
2872 | ret = PTR_ERR(handle); | |
2873 | handle = NULL; | |
2874 | mlog_errno(ret); | |
2875 | goto out; | |
2876 | } | |
2877 | ||
2878 | for (i = 0; i < blk_per_bucket; i++) { | |
2879 | ret = ocfs2_journal_access(handle, inode, bhs[i], | |
2880 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2881 | if (ret < 0) { | |
2882 | mlog_errno(ret); | |
2883 | goto commit; | |
2884 | } | |
2885 | } | |
2886 | ||
2887 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
2888 | entries = (char *)xh->xh_entries; | |
2889 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
2890 | ||
2891 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
2892 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
2893 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
2894 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
2895 | |
2896 | /* | |
2897 | * sort all the entries by their offset. | |
2898 | * the largest will be the first, so that we can | |
2899 | * move them to the end one by one. | |
2900 | */ | |
2901 | sort(entries, le16_to_cpu(xh->xh_count), | |
2902 | sizeof(struct ocfs2_xattr_entry), | |
2903 | cmp_xe_offset, swap_xe); | |
2904 | ||
2905 | /* Move all name/values to the end of the bucket. */ | |
2906 | xe = xh->xh_entries; | |
2907 | end = OCFS2_XATTR_BUCKET_SIZE; | |
2908 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
2909 | offset = le16_to_cpu(xe->xe_name_offset); | |
2910 | if (ocfs2_xattr_is_local(xe)) | |
2911 | value_len = OCFS2_XATTR_SIZE( | |
2912 | le64_to_cpu(xe->xe_value_size)); | |
2913 | else | |
2914 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
2915 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
2916 | ||
2917 | /* | |
2918 | * We must make sure that the name/value pair | |
2919 | * exist in the same block. So adjust end to | |
2920 | * the previous block end if needed. | |
2921 | */ | |
2922 | if (((end - len) / blocksize != | |
2923 | (end - 1) / blocksize)) | |
2924 | end = end - end % blocksize; | |
2925 | ||
2926 | if (end > offset + len) { | |
2927 | memmove(bucket_buf + end - len, | |
2928 | bucket_buf + offset, len); | |
2929 | xe->xe_name_offset = cpu_to_le16(end - len); | |
2930 | } | |
2931 | ||
2932 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
2933 | "bucket %llu\n", (unsigned long long)blkno); | |
2934 | ||
2935 | end -= len; | |
2936 | } | |
2937 | ||
2938 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
2939 | "bucket %llu\n", (unsigned long long)blkno); | |
2940 | ||
2941 | if (xh_free_start == end) | |
2942 | goto commit; | |
2943 | ||
2944 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
2945 | xh->xh_free_start = cpu_to_le16(end); | |
2946 | ||
2947 | /* sort the entries by their name_hash. */ | |
2948 | sort(entries, le16_to_cpu(xh->xh_count), | |
2949 | sizeof(struct ocfs2_xattr_entry), | |
2950 | cmp_xe, swap_xe); | |
2951 | ||
2952 | buf = bucket_buf; | |
2953 | for (i = 0; i < blk_per_bucket; i++, buf += blocksize) { | |
2954 | memcpy(bhs[i]->b_data, buf, blocksize); | |
2955 | ocfs2_journal_dirty(handle, bhs[i]); | |
2956 | } | |
2957 | ||
2958 | commit: | |
2959 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2960 | out: | |
2961 | ||
2962 | if (bhs) { | |
2963 | for (i = 0; i < blk_per_bucket; i++) | |
2964 | brelse(bhs[i]); | |
2965 | } | |
2966 | kfree(bhs); | |
2967 | ||
2968 | kfree(bucket_buf); | |
2969 | return ret; | |
2970 | } | |
2971 | ||
2972 | /* | |
2973 | * Move half nums of the xattr bucket in the previous cluster to this new | |
2974 | * cluster. We only touch the last cluster of the previous extend record. | |
2975 | * | |
2976 | * first_bh is the first buffer_head of a series of bucket in the same | |
2977 | * extent rec and header_bh is the header of one bucket in this cluster. | |
2978 | * They will be updated if we move the data header_bh contains to the new | |
2979 | * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. | |
2980 | */ | |
2981 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
2982 | handle_t *handle, | |
2983 | struct buffer_head **first_bh, | |
2984 | struct buffer_head **header_bh, | |
2985 | u64 new_blkno, | |
2986 | u64 prev_blkno, | |
2987 | u32 num_clusters, | |
2988 | u32 *first_hash) | |
2989 | { | |
2990 | int i, ret, credits; | |
2991 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2992 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2993 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
2994 | int blocksize = inode->i_sb->s_blocksize; | |
2995 | struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; | |
2996 | struct ocfs2_xattr_header *new_xh; | |
2997 | struct ocfs2_xattr_header *xh = | |
2998 | (struct ocfs2_xattr_header *)((*first_bh)->b_data); | |
2999 | ||
3000 | BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); | |
3001 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); | |
3002 | ||
3003 | prev_bh = *first_bh; | |
3004 | get_bh(prev_bh); | |
3005 | xh = (struct ocfs2_xattr_header *)prev_bh->b_data; | |
3006 | ||
3007 | prev_blkno += (num_clusters - 1) * bpc + bpc / 2; | |
3008 | ||
3009 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", | |
de29c085 | 3010 | (unsigned long long)prev_blkno, (unsigned long long)new_blkno); |
01225596 TM |
3011 | |
3012 | /* | |
3013 | * We need to update the 1st half of the new cluster and | |
3014 | * 1 more for the update of the 1st bucket of the previous | |
3015 | * extent record. | |
3016 | */ | |
3017 | credits = bpc / 2 + 1; | |
3018 | ret = ocfs2_extend_trans(handle, credits); | |
3019 | if (ret) { | |
3020 | mlog_errno(ret); | |
3021 | goto out; | |
3022 | } | |
3023 | ||
3024 | ret = ocfs2_journal_access(handle, inode, prev_bh, | |
3025 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3026 | if (ret) { | |
3027 | mlog_errno(ret); | |
3028 | goto out; | |
3029 | } | |
3030 | ||
3031 | for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { | |
3032 | old_bh = new_bh = NULL; | |
3033 | new_bh = sb_getblk(inode->i_sb, new_blkno); | |
3034 | if (!new_bh) { | |
3035 | ret = -EIO; | |
3036 | mlog_errno(ret); | |
3037 | goto out; | |
3038 | } | |
3039 | ||
3040 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
3041 | ||
3042 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
3043 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3044 | if (ret < 0) { | |
3045 | mlog_errno(ret); | |
3046 | brelse(new_bh); | |
3047 | goto out; | |
3048 | } | |
3049 | ||
0fcaa56a | 3050 | ret = ocfs2_read_block(inode, prev_blkno, &old_bh); |
01225596 TM |
3051 | if (ret < 0) { |
3052 | mlog_errno(ret); | |
3053 | brelse(new_bh); | |
3054 | goto out; | |
3055 | } | |
3056 | ||
3057 | memcpy(new_bh->b_data, old_bh->b_data, blocksize); | |
3058 | ||
3059 | if (i == 0) { | |
3060 | new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; | |
3061 | new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); | |
3062 | ||
3063 | if (first_hash) | |
3064 | *first_hash = le32_to_cpu( | |
3065 | new_xh->xh_entries[0].xe_name_hash); | |
3066 | new_first_bh = new_bh; | |
3067 | get_bh(new_first_bh); | |
3068 | } | |
3069 | ||
3070 | ocfs2_journal_dirty(handle, new_bh); | |
3071 | ||
3072 | if (*header_bh == old_bh) { | |
3073 | brelse(*header_bh); | |
3074 | *header_bh = new_bh; | |
3075 | get_bh(*header_bh); | |
3076 | ||
3077 | brelse(*first_bh); | |
3078 | *first_bh = new_first_bh; | |
3079 | get_bh(*first_bh); | |
3080 | } | |
3081 | brelse(new_bh); | |
3082 | brelse(old_bh); | |
3083 | } | |
3084 | ||
3085 | le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); | |
3086 | ||
3087 | ocfs2_journal_dirty(handle, prev_bh); | |
3088 | out: | |
3089 | brelse(prev_bh); | |
3090 | brelse(new_first_bh); | |
3091 | return ret; | |
3092 | } | |
3093 | ||
3094 | static int ocfs2_read_xattr_bucket(struct inode *inode, | |
3095 | u64 blkno, | |
3096 | struct buffer_head **bhs, | |
3097 | int new) | |
3098 | { | |
3099 | int ret = 0; | |
3100 | u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3101 | ||
3102 | if (!new) | |
31d33073 | 3103 | return ocfs2_read_blocks(inode, blkno, |
1efd47f8 | 3104 | blk_per_bucket, bhs, 0); |
01225596 TM |
3105 | |
3106 | for (i = 0; i < blk_per_bucket; i++) { | |
3107 | bhs[i] = sb_getblk(inode->i_sb, blkno + i); | |
3108 | if (bhs[i] == NULL) { | |
3109 | ret = -EIO; | |
3110 | mlog_errno(ret); | |
3111 | break; | |
3112 | } | |
3113 | ocfs2_set_new_buffer_uptodate(inode, bhs[i]); | |
3114 | } | |
3115 | ||
3116 | return ret; | |
3117 | } | |
3118 | ||
3119 | /* | |
80bcaf34 TM |
3120 | * Find the suitable pos when we divide a bucket into 2. |
3121 | * We have to make sure the xattrs with the same hash value exist | |
3122 | * in the same bucket. | |
3123 | * | |
3124 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3125 | * place where the hash value changes. Try to find the most even split. | |
3126 | * The most common case is that all entries have different hash values, | |
3127 | * and the first check we make will find a place to split. | |
3128 | */ | |
3129 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3130 | { | |
3131 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3132 | int count = le16_to_cpu(xh->xh_count); | |
3133 | int delta, middle = count / 2; | |
3134 | ||
3135 | /* | |
3136 | * We start at the middle. Each step gets farther away in both | |
3137 | * directions. We therefore hit the change in hash value | |
3138 | * nearest to the middle. Note that this loop does not execute for | |
3139 | * count < 2. | |
3140 | */ | |
3141 | for (delta = 0; delta < middle; delta++) { | |
3142 | /* Let's check delta earlier than middle */ | |
3143 | if (cmp_xe(&entries[middle - delta - 1], | |
3144 | &entries[middle - delta])) | |
3145 | return middle - delta; | |
3146 | ||
3147 | /* For even counts, don't walk off the end */ | |
3148 | if ((middle + delta + 1) == count) | |
3149 | continue; | |
3150 | ||
3151 | /* Now try delta past middle */ | |
3152 | if (cmp_xe(&entries[middle + delta], | |
3153 | &entries[middle + delta + 1])) | |
3154 | return middle + delta + 1; | |
3155 | } | |
3156 | ||
3157 | /* Every entry had the same hash */ | |
3158 | return count; | |
3159 | } | |
3160 | ||
3161 | /* | |
3162 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3163 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3164 | * |
3165 | * Normally half of the xattrs will be moved. But we have to make | |
3166 | * sure that the xattrs with the same hash value are stored in the | |
3167 | * same bucket. If all the xattrs in this bucket have the same hash | |
3168 | * value, the new bucket will be initialized as an empty one and the | |
3169 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3170 | */ |
80bcaf34 TM |
3171 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3172 | handle_t *handle, | |
3173 | u64 blk, | |
3174 | u64 new_blk, | |
3175 | u32 *first_hash, | |
3176 | int new_bucket_head) | |
01225596 TM |
3177 | { |
3178 | int ret, i; | |
80bcaf34 | 3179 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
01225596 TM |
3180 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3181 | struct buffer_head **s_bhs, **t_bhs = NULL; | |
3182 | struct ocfs2_xattr_header *xh; | |
3183 | struct ocfs2_xattr_entry *xe; | |
3184 | int blocksize = inode->i_sb->s_blocksize; | |
3185 | ||
80bcaf34 | 3186 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3187 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 TM |
3188 | |
3189 | s_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); | |
3190 | if (!s_bhs) | |
3191 | return -ENOMEM; | |
3192 | ||
3193 | ret = ocfs2_read_xattr_bucket(inode, blk, s_bhs, 0); | |
3194 | if (ret) { | |
3195 | mlog_errno(ret); | |
3196 | goto out; | |
3197 | } | |
3198 | ||
3199 | ret = ocfs2_journal_access(handle, inode, s_bhs[0], | |
3200 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3201 | if (ret) { | |
3202 | mlog_errno(ret); | |
3203 | goto out; | |
3204 | } | |
3205 | ||
3206 | t_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); | |
3207 | if (!t_bhs) { | |
3208 | ret = -ENOMEM; | |
3209 | goto out; | |
3210 | } | |
3211 | ||
3212 | ret = ocfs2_read_xattr_bucket(inode, new_blk, t_bhs, new_bucket_head); | |
3213 | if (ret) { | |
3214 | mlog_errno(ret); | |
3215 | goto out; | |
3216 | } | |
3217 | ||
3218 | for (i = 0; i < blk_per_bucket; i++) { | |
3219 | ret = ocfs2_journal_access(handle, inode, t_bhs[i], | |
eb6ff239 JB |
3220 | new_bucket_head ? |
3221 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3222 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
3223 | if (ret) { |
3224 | mlog_errno(ret); | |
3225 | goto out; | |
3226 | } | |
3227 | } | |
3228 | ||
80bcaf34 TM |
3229 | xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data; |
3230 | count = le16_to_cpu(xh->xh_count); | |
3231 | start = ocfs2_xattr_find_divide_pos(xh); | |
3232 | ||
3233 | if (start == count) { | |
3234 | xe = &xh->xh_entries[start-1]; | |
3235 | ||
3236 | /* | |
3237 | * initialized a new empty bucket here. | |
3238 | * The hash value is set as one larger than | |
3239 | * that of the last entry in the previous bucket. | |
3240 | */ | |
3241 | for (i = 0; i < blk_per_bucket; i++) | |
3242 | memset(t_bhs[i]->b_data, 0, blocksize); | |
3243 | ||
3244 | xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data; | |
3245 | xh->xh_free_start = cpu_to_le16(blocksize); | |
3246 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3247 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3248 | ||
3249 | goto set_num_buckets; | |
3250 | } | |
3251 | ||
01225596 TM |
3252 | /* copy the whole bucket to the new first. */ |
3253 | for (i = 0; i < blk_per_bucket; i++) | |
3254 | memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); | |
3255 | ||
3256 | /* update the new bucket. */ | |
3257 | xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data; | |
01225596 TM |
3258 | |
3259 | /* | |
3260 | * Calculate the total name/value len and xh_free_start for | |
3261 | * the old bucket first. | |
3262 | */ | |
3263 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3264 | name_value_len = 0; | |
3265 | for (i = 0; i < start; i++) { | |
3266 | xe = &xh->xh_entries[i]; | |
3267 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3268 | if (ocfs2_xattr_is_local(xe)) | |
3269 | xe_len += | |
3270 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3271 | else | |
3272 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3273 | name_value_len += xe_len; | |
3274 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3275 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3276 | } | |
3277 | ||
3278 | /* | |
3279 | * Now begin the modification to the new bucket. | |
3280 | * | |
3281 | * In the new bucket, We just move the xattr entry to the beginning | |
3282 | * and don't touch the name/value. So there will be some holes in the | |
3283 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3284 | * called. | |
3285 | */ | |
3286 | xe = &xh->xh_entries[start]; | |
3287 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3288 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3289 | (int)((char *)xe - (char *)xh), |
3290 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3291 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3292 | xe = &xh->xh_entries[count - start]; | |
3293 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3294 | memset((char *)xe, 0, len); | |
3295 | ||
3296 | le16_add_cpu(&xh->xh_count, -start); | |
3297 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3298 | ||
3299 | /* Calculate xh_free_start for the new bucket. */ | |
3300 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3301 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3302 | xe = &xh->xh_entries[i]; | |
3303 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3304 | if (ocfs2_xattr_is_local(xe)) | |
3305 | xe_len += | |
3306 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3307 | else | |
3308 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3309 | if (le16_to_cpu(xe->xe_name_offset) < | |
3310 | le16_to_cpu(xh->xh_free_start)) | |
3311 | xh->xh_free_start = xe->xe_name_offset; | |
3312 | } | |
3313 | ||
80bcaf34 | 3314 | set_num_buckets: |
01225596 TM |
3315 | /* set xh->xh_num_buckets for the new xh. */ |
3316 | if (new_bucket_head) | |
3317 | xh->xh_num_buckets = cpu_to_le16(1); | |
3318 | else | |
3319 | xh->xh_num_buckets = 0; | |
3320 | ||
3321 | for (i = 0; i < blk_per_bucket; i++) { | |
3322 | ocfs2_journal_dirty(handle, t_bhs[i]); | |
3323 | if (ret) | |
3324 | mlog_errno(ret); | |
3325 | } | |
3326 | ||
3327 | /* store the first_hash of the new bucket. */ | |
3328 | if (first_hash) | |
3329 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3330 | ||
3331 | /* | |
80bcaf34 TM |
3332 | * Now only update the 1st block of the old bucket. If we |
3333 | * just added a new empty bucket, there is no need to modify | |
3334 | * it. | |
01225596 | 3335 | */ |
80bcaf34 TM |
3336 | if (start == count) |
3337 | goto out; | |
3338 | ||
01225596 TM |
3339 | xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data; |
3340 | memset(&xh->xh_entries[start], 0, | |
3341 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3342 | xh->xh_count = cpu_to_le16(start); | |
3343 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3344 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3345 | ||
3346 | ocfs2_journal_dirty(handle, s_bhs[0]); | |
3347 | if (ret) | |
3348 | mlog_errno(ret); | |
3349 | ||
3350 | out: | |
3351 | if (s_bhs) { | |
3352 | for (i = 0; i < blk_per_bucket; i++) | |
3353 | brelse(s_bhs[i]); | |
3354 | } | |
3355 | kfree(s_bhs); | |
3356 | ||
3357 | if (t_bhs) { | |
3358 | for (i = 0; i < blk_per_bucket; i++) | |
3359 | brelse(t_bhs[i]); | |
3360 | } | |
3361 | kfree(t_bhs); | |
3362 | ||
3363 | return ret; | |
3364 | } | |
3365 | ||
3366 | /* | |
3367 | * Copy xattr from one bucket to another bucket. | |
3368 | * | |
3369 | * The caller must make sure that the journal transaction | |
3370 | * has enough space for journaling. | |
3371 | */ | |
3372 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3373 | handle_t *handle, | |
3374 | u64 s_blkno, | |
3375 | u64 t_blkno, | |
3376 | int t_is_new) | |
3377 | { | |
3378 | int ret, i; | |
3379 | int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3380 | int blocksize = inode->i_sb->s_blocksize; | |
3381 | struct buffer_head **s_bhs, **t_bhs = NULL; | |
3382 | ||
3383 | BUG_ON(s_blkno == t_blkno); | |
3384 | ||
3385 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3386 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3387 | t_is_new); | |
01225596 TM |
3388 | |
3389 | s_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
3390 | GFP_NOFS); | |
3391 | if (!s_bhs) | |
3392 | return -ENOMEM; | |
3393 | ||
3394 | ret = ocfs2_read_xattr_bucket(inode, s_blkno, s_bhs, 0); | |
3395 | if (ret) | |
3396 | goto out; | |
3397 | ||
3398 | t_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
3399 | GFP_NOFS); | |
3400 | if (!t_bhs) { | |
3401 | ret = -ENOMEM; | |
3402 | goto out; | |
3403 | } | |
3404 | ||
3405 | ret = ocfs2_read_xattr_bucket(inode, t_blkno, t_bhs, t_is_new); | |
3406 | if (ret) | |
3407 | goto out; | |
3408 | ||
3409 | for (i = 0; i < blk_per_bucket; i++) { | |
3410 | ret = ocfs2_journal_access(handle, inode, t_bhs[i], | |
eb6ff239 JB |
3411 | t_is_new ? |
3412 | OCFS2_JOURNAL_ACCESS_CREATE : | |
01225596 TM |
3413 | OCFS2_JOURNAL_ACCESS_WRITE); |
3414 | if (ret) | |
3415 | goto out; | |
3416 | } | |
3417 | ||
3418 | for (i = 0; i < blk_per_bucket; i++) { | |
3419 | memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); | |
3420 | ocfs2_journal_dirty(handle, t_bhs[i]); | |
3421 | } | |
3422 | ||
3423 | out: | |
3424 | if (s_bhs) { | |
3425 | for (i = 0; i < blk_per_bucket; i++) | |
3426 | brelse(s_bhs[i]); | |
3427 | } | |
3428 | kfree(s_bhs); | |
3429 | ||
3430 | if (t_bhs) { | |
3431 | for (i = 0; i < blk_per_bucket; i++) | |
3432 | brelse(t_bhs[i]); | |
3433 | } | |
3434 | kfree(t_bhs); | |
3435 | ||
3436 | return ret; | |
3437 | } | |
3438 | ||
3439 | /* | |
3440 | * Copy one xattr cluster from src_blk to to_blk. | |
3441 | * The to_blk will become the first bucket header of the cluster, so its | |
3442 | * xh_num_buckets will be initialized as the bucket num in the cluster. | |
3443 | */ | |
3444 | static int ocfs2_cp_xattr_cluster(struct inode *inode, | |
3445 | handle_t *handle, | |
3446 | struct buffer_head *first_bh, | |
3447 | u64 src_blk, | |
3448 | u64 to_blk, | |
3449 | u32 *first_hash) | |
3450 | { | |
3451 | int i, ret, credits; | |
3452 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3453 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3454 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3455 | struct buffer_head *bh = NULL; | |
3456 | struct ocfs2_xattr_header *xh; | |
3457 | u64 to_blk_start = to_blk; | |
3458 | ||
de29c085 MF |
3459 | mlog(0, "cp xattrs from cluster %llu to %llu\n", |
3460 | (unsigned long long)src_blk, (unsigned long long)to_blk); | |
01225596 TM |
3461 | |
3462 | /* | |
3463 | * We need to update the new cluster and 1 more for the update of | |
3464 | * the 1st bucket of the previous extent rec. | |
3465 | */ | |
3466 | credits = bpc + 1; | |
3467 | ret = ocfs2_extend_trans(handle, credits); | |
3468 | if (ret) { | |
3469 | mlog_errno(ret); | |
3470 | goto out; | |
3471 | } | |
3472 | ||
3473 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3474 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3475 | if (ret) { | |
3476 | mlog_errno(ret); | |
3477 | goto out; | |
3478 | } | |
3479 | ||
3480 | for (i = 0; i < num_buckets; i++) { | |
3481 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
3482 | src_blk, to_blk, 1); | |
3483 | if (ret) { | |
3484 | mlog_errno(ret); | |
3485 | goto out; | |
3486 | } | |
3487 | ||
3488 | src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3489 | to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3490 | } | |
3491 | ||
3492 | /* update the old bucket header. */ | |
3493 | xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3494 | le16_add_cpu(&xh->xh_num_buckets, -num_buckets); | |
3495 | ||
3496 | ocfs2_journal_dirty(handle, first_bh); | |
3497 | ||
3498 | /* update the new bucket header. */ | |
0fcaa56a | 3499 | ret = ocfs2_read_block(inode, to_blk_start, &bh); |
01225596 TM |
3500 | if (ret < 0) { |
3501 | mlog_errno(ret); | |
3502 | goto out; | |
3503 | } | |
3504 | ||
3505 | ret = ocfs2_journal_access(handle, inode, bh, | |
3506 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3507 | if (ret) { | |
3508 | mlog_errno(ret); | |
3509 | goto out; | |
3510 | } | |
3511 | ||
3512 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
3513 | xh->xh_num_buckets = cpu_to_le16(num_buckets); | |
3514 | ||
3515 | ocfs2_journal_dirty(handle, bh); | |
3516 | ||
3517 | if (first_hash) | |
3518 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3519 | out: | |
3520 | brelse(bh); | |
3521 | return ret; | |
3522 | } | |
3523 | ||
3524 | /* | |
80bcaf34 | 3525 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
3526 | * This function should only be called when bucket size == cluster size. |
3527 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
3528 | */ | |
80bcaf34 TM |
3529 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
3530 | handle_t *handle, | |
3531 | u64 prev_blk, | |
3532 | u64 new_blk, | |
3533 | u32 *first_hash) | |
01225596 TM |
3534 | { |
3535 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3536 | int ret, credits = 2 * blk_per_bucket; | |
3537 | ||
3538 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
3539 | ||
3540 | ret = ocfs2_extend_trans(handle, credits); | |
3541 | if (ret) { | |
3542 | mlog_errno(ret); | |
3543 | return ret; | |
3544 | } | |
3545 | ||
3546 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
3547 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
3548 | new_blk, first_hash, 1); | |
01225596 TM |
3549 | } |
3550 | ||
3551 | /* | |
3552 | * Move some xattrs from the old cluster to the new one since they are not | |
3553 | * contiguous in ocfs2 xattr tree. | |
3554 | * | |
3555 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
3556 | * prev_blk to it. v_start will be set as the first name hash value in this | |
3557 | * new cluster so that it can be used as e_cpos during tree insertion and | |
3558 | * don't collide with our original b-tree operations. first_bh and header_bh | |
3559 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
3560 | * to extend the insert bucket. | |
3561 | * | |
3562 | * The problem is how much xattr should we move to the new one and when should | |
3563 | * we update first_bh and header_bh? | |
3564 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
3565 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
3566 | * update the first_bh and header_bh if the insert bucket has been moved | |
3567 | * to the new cluster. | |
3568 | * 2. If cluster_size == bucket_size: | |
3569 | * a) If the previous extent rec has more than one cluster and the insert | |
3570 | * place isn't in the last cluster, copy the entire last cluster to the | |
3571 | * new one. This time, we don't need to upate the first_bh and header_bh | |
3572 | * since they will not be moved into the new cluster. | |
3573 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
3574 | * the new one. And we set the extend flag to zero if the insert place is | |
3575 | * moved into the new allocated cluster since no extend is needed. | |
3576 | */ | |
3577 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
3578 | handle_t *handle, | |
3579 | struct buffer_head **first_bh, | |
3580 | struct buffer_head **header_bh, | |
3581 | u64 new_blk, | |
3582 | u64 prev_blk, | |
3583 | u32 prev_clusters, | |
3584 | u32 *v_start, | |
3585 | int *extend) | |
3586 | { | |
3587 | int ret = 0; | |
3588 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3589 | ||
3590 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
de29c085 MF |
3591 | (unsigned long long)prev_blk, prev_clusters, |
3592 | (unsigned long long)new_blk); | |
01225596 TM |
3593 | |
3594 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) | |
3595 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, | |
3596 | handle, | |
3597 | first_bh, | |
3598 | header_bh, | |
3599 | new_blk, | |
3600 | prev_blk, | |
3601 | prev_clusters, | |
3602 | v_start); | |
3603 | else { | |
3604 | u64 last_blk = prev_blk + bpc * (prev_clusters - 1); | |
3605 | ||
3606 | if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) | |
3607 | ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, | |
3608 | last_blk, new_blk, | |
3609 | v_start); | |
3610 | else { | |
80bcaf34 TM |
3611 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
3612 | last_blk, new_blk, | |
3613 | v_start); | |
01225596 TM |
3614 | |
3615 | if ((*header_bh)->b_blocknr == last_blk && extend) | |
3616 | *extend = 0; | |
3617 | } | |
3618 | } | |
3619 | ||
3620 | return ret; | |
3621 | } | |
3622 | ||
3623 | /* | |
3624 | * Add a new cluster for xattr storage. | |
3625 | * | |
3626 | * If the new cluster is contiguous with the previous one, it will be | |
3627 | * appended to the same extent record, and num_clusters will be updated. | |
3628 | * If not, we will insert a new extent for it and move some xattrs in | |
3629 | * the last cluster into the new allocated one. | |
3630 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
3631 | * lose the benefits of hashing because we'll have to search large leaves. | |
3632 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
3633 | * if it's bigger). | |
3634 | * | |
3635 | * first_bh is the first block of the previous extent rec and header_bh | |
3636 | * indicates the bucket we will insert the new xattrs. They will be updated | |
3637 | * when the header_bh is moved into the new cluster. | |
3638 | */ | |
3639 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
3640 | struct buffer_head *root_bh, | |
3641 | struct buffer_head **first_bh, | |
3642 | struct buffer_head **header_bh, | |
3643 | u32 *num_clusters, | |
3644 | u32 prev_cpos, | |
3645 | u64 prev_blkno, | |
3646 | int *extend) | |
3647 | { | |
3648 | int ret, credits; | |
3649 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3650 | u32 prev_clusters = *num_clusters; | |
3651 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
3652 | u64 block; | |
3653 | handle_t *handle = NULL; | |
3654 | struct ocfs2_alloc_context *data_ac = NULL; | |
3655 | struct ocfs2_alloc_context *meta_ac = NULL; | |
3656 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 3657 | struct ocfs2_extent_tree et; |
01225596 TM |
3658 | |
3659 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
3660 | "previous xattr blkno = %llu\n", | |
3661 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
de29c085 | 3662 | prev_cpos, (unsigned long long)prev_blkno); |
01225596 | 3663 | |
8d6220d6 | 3664 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c JB |
3665 | |
3666 | ret = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, | |
3667 | &data_ac, &meta_ac); | |
01225596 TM |
3668 | if (ret) { |
3669 | mlog_errno(ret); | |
3670 | goto leave; | |
3671 | } | |
3672 | ||
f99b9b7c JB |
3673 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
3674 | clusters_to_add); | |
01225596 TM |
3675 | handle = ocfs2_start_trans(osb, credits); |
3676 | if (IS_ERR(handle)) { | |
3677 | ret = PTR_ERR(handle); | |
3678 | handle = NULL; | |
3679 | mlog_errno(ret); | |
3680 | goto leave; | |
3681 | } | |
3682 | ||
3683 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
3684 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3685 | if (ret < 0) { | |
3686 | mlog_errno(ret); | |
3687 | goto leave; | |
3688 | } | |
3689 | ||
3690 | ret = __ocfs2_claim_clusters(osb, handle, data_ac, 1, | |
3691 | clusters_to_add, &bit_off, &num_bits); | |
3692 | if (ret < 0) { | |
3693 | if (ret != -ENOSPC) | |
3694 | mlog_errno(ret); | |
3695 | goto leave; | |
3696 | } | |
3697 | ||
3698 | BUG_ON(num_bits > clusters_to_add); | |
3699 | ||
3700 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
3701 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
3702 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
3703 | ||
3704 | if (prev_blkno + prev_clusters * bpc == block && | |
3705 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= | |
3706 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
3707 | /* | |
3708 | * If this cluster is contiguous with the old one and | |
3709 | * adding this new cluster, we don't surpass the limit of | |
3710 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
3711 | * initialized and used like other buckets in the previous | |
3712 | * cluster. | |
3713 | * So add it as a contiguous one. The caller will handle | |
3714 | * its init process. | |
3715 | */ | |
3716 | v_start = prev_cpos + prev_clusters; | |
3717 | *num_clusters = prev_clusters + num_bits; | |
3718 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
3719 | num_bits); | |
3720 | } else { | |
3721 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
3722 | handle, | |
3723 | first_bh, | |
3724 | header_bh, | |
3725 | block, | |
3726 | prev_blkno, | |
3727 | prev_clusters, | |
3728 | &v_start, | |
3729 | extend); | |
3730 | if (ret) { | |
3731 | mlog_errno(ret); | |
3732 | goto leave; | |
3733 | } | |
3734 | } | |
3735 | ||
28b8ca0b TM |
3736 | if (handle->h_buffer_credits < credits) { |
3737 | /* | |
3738 | * The journal has been restarted before, and don't | |
3739 | * have enough space for the insertion, so extend it | |
3740 | * here. | |
3741 | */ | |
3742 | ret = ocfs2_extend_trans(handle, credits); | |
3743 | if (ret) { | |
3744 | mlog_errno(ret); | |
3745 | goto leave; | |
3746 | } | |
3747 | } | |
01225596 | 3748 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", |
de29c085 | 3749 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c JB |
3750 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
3751 | num_bits, 0, meta_ac); | |
01225596 TM |
3752 | if (ret < 0) { |
3753 | mlog_errno(ret); | |
3754 | goto leave; | |
3755 | } | |
3756 | ||
3757 | ret = ocfs2_journal_dirty(handle, root_bh); | |
3758 | if (ret < 0) { | |
3759 | mlog_errno(ret); | |
3760 | goto leave; | |
3761 | } | |
3762 | ||
3763 | leave: | |
3764 | if (handle) | |
3765 | ocfs2_commit_trans(osb, handle); | |
3766 | if (data_ac) | |
3767 | ocfs2_free_alloc_context(data_ac); | |
3768 | if (meta_ac) | |
3769 | ocfs2_free_alloc_context(meta_ac); | |
3770 | ||
3771 | return ret; | |
3772 | } | |
3773 | ||
3774 | /* | |
3775 | * Extend a new xattr bucket and move xattrs to the end one by one until | |
3776 | * We meet with start_bh. Only move half of the xattrs to the bucket after it. | |
3777 | */ | |
3778 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
3779 | struct buffer_head *first_bh, | |
3780 | struct buffer_head *start_bh, | |
3781 | u32 num_clusters) | |
3782 | { | |
3783 | int ret, credits; | |
3784 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3785 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3786 | u64 start_blk = start_bh->b_blocknr, end_blk; | |
3787 | u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); | |
3788 | handle_t *handle; | |
3789 | struct ocfs2_xattr_header *first_xh = | |
3790 | (struct ocfs2_xattr_header *)first_bh->b_data; | |
3791 | u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); | |
3792 | ||
3793 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
de29c085 | 3794 | "from %llu, len = %u\n", (unsigned long long)start_blk, |
01225596 TM |
3795 | (unsigned long long)first_bh->b_blocknr, num_clusters); |
3796 | ||
3797 | BUG_ON(bucket >= num_buckets); | |
3798 | ||
3799 | end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; | |
3800 | ||
3801 | /* | |
3802 | * We will touch all the buckets after the start_bh(include it). | |
3803 | * Add one more bucket and modify the first_bh. | |
3804 | */ | |
3805 | credits = end_blk - start_blk + 2 * blk_per_bucket + 1; | |
3806 | handle = ocfs2_start_trans(osb, credits); | |
3807 | if (IS_ERR(handle)) { | |
3808 | ret = PTR_ERR(handle); | |
3809 | handle = NULL; | |
3810 | mlog_errno(ret); | |
3811 | goto out; | |
3812 | } | |
3813 | ||
3814 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3815 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3816 | if (ret) { | |
3817 | mlog_errno(ret); | |
3818 | goto commit; | |
3819 | } | |
3820 | ||
3821 | while (end_blk != start_blk) { | |
3822 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, | |
3823 | end_blk + blk_per_bucket, 0); | |
3824 | if (ret) | |
3825 | goto commit; | |
3826 | end_blk -= blk_per_bucket; | |
3827 | } | |
3828 | ||
3829 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
3830 | ret = ocfs2_divide_xattr_bucket(inode, handle, start_blk, |
3831 | start_blk + blk_per_bucket, NULL, 0); | |
01225596 TM |
3832 | |
3833 | le16_add_cpu(&first_xh->xh_num_buckets, 1); | |
3834 | ocfs2_journal_dirty(handle, first_bh); | |
3835 | ||
3836 | commit: | |
3837 | ocfs2_commit_trans(osb, handle); | |
3838 | out: | |
3839 | return ret; | |
3840 | } | |
3841 | ||
3842 | /* | |
3843 | * Add new xattr bucket in an extent record and adjust the buckets accordingly. | |
3844 | * xb_bh is the ocfs2_xattr_block. | |
3845 | * We will move all the buckets starting from header_bh to the next place. As | |
3846 | * for this one, half num of its xattrs will be moved to the next one. | |
3847 | * | |
3848 | * We will allocate a new cluster if current cluster is full and adjust | |
3849 | * header_bh and first_bh if the insert place is moved to the new cluster. | |
3850 | */ | |
3851 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
3852 | struct buffer_head *xb_bh, | |
3853 | struct buffer_head *header_bh) | |
3854 | { | |
3855 | struct ocfs2_xattr_header *first_xh = NULL; | |
3856 | struct buffer_head *first_bh = NULL; | |
3857 | struct ocfs2_xattr_block *xb = | |
3858 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3859 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3860 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3861 | struct ocfs2_xattr_header *xh = | |
3862 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
3863 | u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3864 | struct super_block *sb = inode->i_sb; | |
3865 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
3866 | int ret, num_buckets, extend = 1; | |
3867 | u64 p_blkno; | |
3868 | u32 e_cpos, num_clusters; | |
3869 | ||
3870 | mlog(0, "Add new xattr bucket starting form %llu\n", | |
3871 | (unsigned long long)header_bh->b_blocknr); | |
3872 | ||
3873 | /* | |
3874 | * Add refrence for header_bh here because it may be | |
3875 | * changed in ocfs2_add_new_xattr_cluster and we need | |
3876 | * to free it in the end. | |
3877 | */ | |
3878 | get_bh(header_bh); | |
3879 | ||
3880 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, | |
3881 | &num_clusters, el); | |
3882 | if (ret) { | |
3883 | mlog_errno(ret); | |
3884 | goto out; | |
3885 | } | |
3886 | ||
0fcaa56a | 3887 | ret = ocfs2_read_block(inode, p_blkno, &first_bh); |
01225596 TM |
3888 | if (ret) { |
3889 | mlog_errno(ret); | |
3890 | goto out; | |
3891 | } | |
3892 | ||
3893 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; | |
3894 | first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3895 | ||
3896 | if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { | |
3897 | ret = ocfs2_add_new_xattr_cluster(inode, | |
3898 | xb_bh, | |
3899 | &first_bh, | |
3900 | &header_bh, | |
3901 | &num_clusters, | |
3902 | e_cpos, | |
3903 | p_blkno, | |
3904 | &extend); | |
3905 | if (ret) { | |
3906 | mlog_errno(ret); | |
3907 | goto out; | |
3908 | } | |
3909 | } | |
3910 | ||
3911 | if (extend) | |
3912 | ret = ocfs2_extend_xattr_bucket(inode, | |
3913 | first_bh, | |
3914 | header_bh, | |
3915 | num_clusters); | |
3916 | if (ret) | |
3917 | mlog_errno(ret); | |
3918 | out: | |
3919 | brelse(first_bh); | |
3920 | brelse(header_bh); | |
3921 | return ret; | |
3922 | } | |
3923 | ||
3924 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
3925 | struct ocfs2_xattr_bucket *bucket, | |
3926 | int offs) | |
3927 | { | |
3928 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
3929 | ||
3930 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 3931 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
3932 | } |
3933 | ||
3934 | /* | |
3935 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
3936 | * |
3937 | * Note: "local" indicates the real data's locality. So we can't | |
3938 | * just its bucket locality by its length. | |
3939 | */ | |
3940 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
3941 | struct ocfs2_xattr_info *xi, | |
3942 | struct ocfs2_xattr_search *xs, | |
3943 | u32 name_hash, | |
5a095611 | 3944 | int local) |
01225596 TM |
3945 | { |
3946 | struct ocfs2_xattr_entry *last, *xe; | |
3947 | int name_len = strlen(xi->name); | |
3948 | struct ocfs2_xattr_header *xh = xs->header; | |
3949 | u16 count = le16_to_cpu(xh->xh_count), start; | |
3950 | size_t blocksize = inode->i_sb->s_blocksize; | |
3951 | char *val; | |
3952 | size_t offs, size, new_size; | |
3953 | ||
3954 | last = &xh->xh_entries[count]; | |
3955 | if (!xs->not_found) { | |
3956 | xe = xs->here; | |
3957 | offs = le16_to_cpu(xe->xe_name_offset); | |
3958 | if (ocfs2_xattr_is_local(xe)) | |
3959 | size = OCFS2_XATTR_SIZE(name_len) + | |
3960 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3961 | else | |
3962 | size = OCFS2_XATTR_SIZE(name_len) + | |
3963 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
3964 | ||
3965 | /* | |
3966 | * If the new value will be stored outside, xi->value has been | |
3967 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
3968 | * goes with xi->value_len, so we can set new_size safely here. | |
3969 | * See ocfs2_xattr_set_in_bucket. | |
3970 | */ | |
3971 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
3972 | OCFS2_XATTR_SIZE(xi->value_len); | |
3973 | ||
3974 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
3975 | if (xi->value) { | |
3976 | if (new_size > size) | |
3977 | goto set_new_name_value; | |
3978 | ||
3979 | /* Now replace the old value with new one. */ | |
3980 | if (local) | |
3981 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
3982 | else | |
3983 | xe->xe_value_size = 0; | |
3984 | ||
3985 | val = ocfs2_xattr_bucket_get_val(inode, | |
3986 | &xs->bucket, offs); | |
3987 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, | |
3988 | size - OCFS2_XATTR_SIZE(name_len)); | |
3989 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
3990 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
3991 | xi->value, xi->value_len); | |
3992 | ||
3993 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
3994 | ocfs2_xattr_set_local(xe, local); | |
3995 | return; | |
3996 | } else { | |
5a095611 TM |
3997 | /* |
3998 | * Remove the old entry if there is more than one. | |
3999 | * We don't remove the last entry so that we can | |
4000 | * use it to indicate the hash value of the empty | |
4001 | * bucket. | |
4002 | */ | |
01225596 | 4003 | last -= 1; |
01225596 | 4004 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4005 | if (xh->xh_count) { |
4006 | memmove(xe, xe + 1, | |
4007 | (void *)last - (void *)xe); | |
4008 | memset(last, 0, | |
4009 | sizeof(struct ocfs2_xattr_entry)); | |
4010 | } else | |
4011 | xh->xh_free_start = | |
4012 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4013 | ||
01225596 TM |
4014 | return; |
4015 | } | |
4016 | } else { | |
4017 | /* find a new entry for insert. */ | |
4018 | int low = 0, high = count - 1, tmp; | |
4019 | struct ocfs2_xattr_entry *tmp_xe; | |
4020 | ||
5a095611 | 4021 | while (low <= high && count) { |
01225596 TM |
4022 | tmp = (low + high) / 2; |
4023 | tmp_xe = &xh->xh_entries[tmp]; | |
4024 | ||
4025 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4026 | low = tmp + 1; | |
4027 | else if (name_hash < | |
4028 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4029 | high = tmp - 1; | |
06b240d8 TM |
4030 | else { |
4031 | low = tmp; | |
01225596 | 4032 | break; |
06b240d8 | 4033 | } |
01225596 TM |
4034 | } |
4035 | ||
4036 | xe = &xh->xh_entries[low]; | |
4037 | if (low != count) | |
4038 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4039 | ||
4040 | le16_add_cpu(&xh->xh_count, 1); | |
4041 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4042 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4043 | xe->xe_name_len = name_len; | |
4044 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4045 | } | |
4046 | ||
4047 | set_new_name_value: | |
4048 | /* Insert the new name+value. */ | |
4049 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4050 | ||
4051 | /* | |
4052 | * We must make sure that the name/value pair | |
4053 | * exists in the same block. | |
4054 | */ | |
4055 | offs = le16_to_cpu(xh->xh_free_start); | |
4056 | start = offs - size; | |
4057 | ||
4058 | if (start >> inode->i_sb->s_blocksize_bits != | |
4059 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4060 | offs = offs - offs % blocksize; | |
4061 | xh->xh_free_start = cpu_to_le16(offs); | |
4062 | } | |
4063 | ||
4064 | val = ocfs2_xattr_bucket_get_val(inode, | |
4065 | &xs->bucket, offs - size); | |
4066 | xe->xe_name_offset = cpu_to_le16(offs - size); | |
4067 | ||
4068 | memset(val, 0, size); | |
4069 | memcpy(val, xi->name, name_len); | |
4070 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4071 | ||
4072 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4073 | ocfs2_xattr_set_local(xe, local); | |
4074 | xs->here = xe; | |
4075 | le16_add_cpu(&xh->xh_free_start, -size); | |
4076 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4077 | ||
4078 | return; | |
4079 | } | |
4080 | ||
4081 | static int ocfs2_xattr_bucket_handle_journal(struct inode *inode, | |
4082 | handle_t *handle, | |
4083 | struct ocfs2_xattr_search *xs, | |
4084 | struct buffer_head **bhs, | |
4085 | u16 bh_num) | |
4086 | { | |
4087 | int ret = 0, off, block_off; | |
4088 | struct ocfs2_xattr_entry *xe = xs->here; | |
4089 | ||
4090 | /* | |
4091 | * First calculate all the blocks we should journal_access | |
4092 | * and journal_dirty. The first block should always be touched. | |
4093 | */ | |
4094 | ret = ocfs2_journal_dirty(handle, bhs[0]); | |
4095 | if (ret) | |
4096 | mlog_errno(ret); | |
4097 | ||
4098 | /* calc the data. */ | |
4099 | off = le16_to_cpu(xe->xe_name_offset); | |
4100 | block_off = off >> inode->i_sb->s_blocksize_bits; | |
4101 | ret = ocfs2_journal_dirty(handle, bhs[block_off]); | |
4102 | if (ret) | |
4103 | mlog_errno(ret); | |
4104 | ||
4105 | return ret; | |
4106 | } | |
4107 | ||
4108 | /* | |
4109 | * Set the xattr entry in the specified bucket. | |
4110 | * The bucket is indicated by xs->bucket and it should have the enough | |
4111 | * space for the xattr insertion. | |
4112 | */ | |
4113 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
4114 | struct ocfs2_xattr_info *xi, | |
4115 | struct ocfs2_xattr_search *xs, | |
4116 | u32 name_hash, | |
5a095611 | 4117 | int local) |
01225596 TM |
4118 | { |
4119 | int i, ret; | |
4120 | handle_t *handle = NULL; | |
4121 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4122 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4123 | ||
ff1ec20e MF |
4124 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4125 | (unsigned long)xi->value_len, xi->name_index, | |
9c7759aa | 4126 | (unsigned long long)bucket_blkno(&xs->bucket)); |
01225596 | 4127 | |
4ac6032d | 4128 | if (!xs->bucket.bu_bhs[1]) { |
31d33073 | 4129 | ret = ocfs2_read_blocks(inode, |
9c7759aa | 4130 | bucket_blkno(&xs->bucket) + 1, |
4ac6032d | 4131 | blk_per_bucket - 1, &xs->bucket.bu_bhs[1], |
1efd47f8 | 4132 | 0); |
01225596 TM |
4133 | if (ret) { |
4134 | mlog_errno(ret); | |
4135 | goto out; | |
4136 | } | |
4137 | } | |
4138 | ||
4139 | handle = ocfs2_start_trans(osb, blk_per_bucket); | |
4140 | if (IS_ERR(handle)) { | |
4141 | ret = PTR_ERR(handle); | |
4142 | handle = NULL; | |
4143 | mlog_errno(ret); | |
4144 | goto out; | |
4145 | } | |
4146 | ||
4147 | for (i = 0; i < blk_per_bucket; i++) { | |
4ac6032d | 4148 | ret = ocfs2_journal_access(handle, inode, xs->bucket.bu_bhs[i], |
01225596 TM |
4149 | OCFS2_JOURNAL_ACCESS_WRITE); |
4150 | if (ret < 0) { | |
4151 | mlog_errno(ret); | |
4152 | goto out; | |
4153 | } | |
4154 | } | |
4155 | ||
5a095611 | 4156 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
01225596 TM |
4157 | |
4158 | /*Only dirty the blocks we have touched in set xattr. */ | |
4159 | ret = ocfs2_xattr_bucket_handle_journal(inode, handle, xs, | |
4ac6032d | 4160 | xs->bucket.bu_bhs, blk_per_bucket); |
01225596 TM |
4161 | if (ret) |
4162 | mlog_errno(ret); | |
4163 | out: | |
4164 | ocfs2_commit_trans(osb, handle); | |
4165 | ||
4166 | return ret; | |
4167 | } | |
4168 | ||
4169 | static int ocfs2_xattr_value_update_size(struct inode *inode, | |
4170 | struct buffer_head *xe_bh, | |
4171 | struct ocfs2_xattr_entry *xe, | |
4172 | u64 new_size) | |
4173 | { | |
4174 | int ret; | |
4175 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4176 | handle_t *handle = NULL; | |
4177 | ||
4178 | handle = ocfs2_start_trans(osb, 1); | |
d3264799 | 4179 | if (IS_ERR(handle)) { |
01225596 TM |
4180 | ret = -ENOMEM; |
4181 | mlog_errno(ret); | |
4182 | goto out; | |
4183 | } | |
4184 | ||
4185 | ret = ocfs2_journal_access(handle, inode, xe_bh, | |
4186 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4187 | if (ret < 0) { | |
4188 | mlog_errno(ret); | |
4189 | goto out_commit; | |
4190 | } | |
4191 | ||
4192 | xe->xe_value_size = cpu_to_le64(new_size); | |
4193 | ||
4194 | ret = ocfs2_journal_dirty(handle, xe_bh); | |
4195 | if (ret < 0) | |
4196 | mlog_errno(ret); | |
4197 | ||
4198 | out_commit: | |
4199 | ocfs2_commit_trans(osb, handle); | |
4200 | out: | |
4201 | return ret; | |
4202 | } | |
4203 | ||
4204 | /* | |
4205 | * Truncate the specified xe_off entry in xattr bucket. | |
4206 | * bucket is indicated by header_bh and len is the new length. | |
4207 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4208 | * | |
4209 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4210 | */ | |
4211 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
4212 | struct buffer_head *header_bh, | |
4213 | int xe_off, | |
4214 | int len) | |
4215 | { | |
4216 | int ret, offset; | |
4217 | u64 value_blk; | |
4218 | struct buffer_head *value_bh = NULL; | |
4219 | struct ocfs2_xattr_value_root *xv; | |
4220 | struct ocfs2_xattr_entry *xe; | |
4221 | struct ocfs2_xattr_header *xh = | |
4222 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4223 | size_t blocksize = inode->i_sb->s_blocksize; | |
4224 | ||
4225 | xe = &xh->xh_entries[xe_off]; | |
4226 | ||
4227 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4228 | ||
4229 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4230 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4231 | ||
4232 | value_blk = offset / blocksize; | |
4233 | ||
4234 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4235 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
4236 | value_blk += header_bh->b_blocknr; | |
4237 | ||
0fcaa56a | 4238 | ret = ocfs2_read_block(inode, value_blk, &value_bh); |
01225596 TM |
4239 | if (ret) { |
4240 | mlog_errno(ret); | |
4241 | goto out; | |
4242 | } | |
4243 | ||
4244 | xv = (struct ocfs2_xattr_value_root *) | |
4245 | (value_bh->b_data + offset % blocksize); | |
4246 | ||
4247 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4248 | xe_off, (unsigned long long)header_bh->b_blocknr, len); | |
4249 | ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len); | |
4250 | if (ret) { | |
4251 | mlog_errno(ret); | |
4252 | goto out; | |
4253 | } | |
4254 | ||
4255 | ret = ocfs2_xattr_value_update_size(inode, header_bh, xe, len); | |
4256 | if (ret) { | |
4257 | mlog_errno(ret); | |
4258 | goto out; | |
4259 | } | |
4260 | ||
4261 | out: | |
4262 | brelse(value_bh); | |
4263 | return ret; | |
4264 | } | |
4265 | ||
4266 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
4267 | struct ocfs2_xattr_search *xs, | |
4268 | int len) | |
4269 | { | |
4270 | int ret, offset; | |
4271 | struct ocfs2_xattr_entry *xe = xs->here; | |
4272 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4273 | ||
4ac6032d | 4274 | BUG_ON(!xs->bucket.bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4275 | |
4276 | offset = xe - xh->xh_entries; | |
4ac6032d | 4277 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket.bu_bhs[0], |
01225596 TM |
4278 | offset, len); |
4279 | if (ret) | |
4280 | mlog_errno(ret); | |
4281 | ||
4282 | return ret; | |
4283 | } | |
4284 | ||
4285 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
4286 | struct ocfs2_xattr_search *xs, | |
4287 | char *val, | |
4288 | int value_len) | |
4289 | { | |
4290 | int offset; | |
4291 | struct ocfs2_xattr_value_root *xv; | |
4292 | struct ocfs2_xattr_entry *xe = xs->here; | |
4293 | ||
4294 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4295 | ||
4296 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4297 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4298 | ||
4299 | xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); | |
4300 | ||
4301 | return __ocfs2_xattr_set_value_outside(inode, xv, val, value_len); | |
4302 | } | |
4303 | ||
01225596 TM |
4304 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4305 | struct buffer_head *root_bh, | |
4306 | u64 blkno, | |
4307 | u32 cpos, | |
4308 | u32 len) | |
4309 | { | |
4310 | int ret; | |
4311 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4312 | struct inode *tl_inode = osb->osb_tl_inode; | |
4313 | handle_t *handle; | |
4314 | struct ocfs2_xattr_block *xb = | |
4315 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4316 | struct ocfs2_alloc_context *meta_ac = NULL; |
4317 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4318 | struct ocfs2_extent_tree et; |
4319 | ||
8d6220d6 | 4320 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4321 | |
4322 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4323 | ||
4324 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4325 | cpos, len, (unsigned long long)blkno); | |
4326 | ||
4327 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4328 | ||
f99b9b7c | 4329 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4330 | if (ret) { |
4331 | mlog_errno(ret); | |
4332 | return ret; | |
4333 | } | |
4334 | ||
4335 | mutex_lock(&tl_inode->i_mutex); | |
4336 | ||
4337 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4338 | ret = __ocfs2_flush_truncate_log(osb); | |
4339 | if (ret < 0) { | |
4340 | mlog_errno(ret); | |
4341 | goto out; | |
4342 | } | |
4343 | } | |
4344 | ||
4345 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
d3264799 | 4346 | if (IS_ERR(handle)) { |
01225596 TM |
4347 | ret = -ENOMEM; |
4348 | mlog_errno(ret); | |
4349 | goto out; | |
4350 | } | |
4351 | ||
4352 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
4353 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4354 | if (ret) { | |
4355 | mlog_errno(ret); | |
4356 | goto out_commit; | |
4357 | } | |
4358 | ||
f99b9b7c JB |
4359 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4360 | &dealloc); | |
01225596 TM |
4361 | if (ret) { |
4362 | mlog_errno(ret); | |
4363 | goto out_commit; | |
4364 | } | |
4365 | ||
4366 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4367 | ||
4368 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4369 | if (ret) { | |
4370 | mlog_errno(ret); | |
4371 | goto out_commit; | |
4372 | } | |
4373 | ||
4374 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4375 | if (ret) | |
4376 | mlog_errno(ret); | |
4377 | ||
4378 | out_commit: | |
4379 | ocfs2_commit_trans(osb, handle); | |
4380 | out: | |
4381 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4382 | ||
4383 | mutex_unlock(&tl_inode->i_mutex); | |
4384 | ||
4385 | if (meta_ac) | |
4386 | ocfs2_free_alloc_context(meta_ac); | |
4387 | ||
4388 | ocfs2_run_deallocs(osb, &dealloc); | |
4389 | ||
4390 | return ret; | |
4391 | } | |
4392 | ||
01225596 TM |
4393 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
4394 | struct ocfs2_xattr_search *xs) | |
4395 | { | |
4396 | handle_t *handle = NULL; | |
3e632946 | 4397 | struct ocfs2_xattr_header *xh = bucket_xh(&xs->bucket); |
01225596 TM |
4398 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4399 | le16_to_cpu(xh->xh_count) - 1]; | |
4400 | int ret = 0; | |
4401 | ||
4402 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), 1); | |
4403 | if (IS_ERR(handle)) { | |
4404 | ret = PTR_ERR(handle); | |
4405 | mlog_errno(ret); | |
4406 | return; | |
4407 | } | |
4408 | ||
4ac6032d | 4409 | ret = ocfs2_journal_access(handle, inode, xs->bucket.bu_bhs[0], |
01225596 TM |
4410 | OCFS2_JOURNAL_ACCESS_WRITE); |
4411 | if (ret) { | |
4412 | mlog_errno(ret); | |
4413 | goto out_commit; | |
4414 | } | |
4415 | ||
4416 | /* Remove the old entry. */ | |
4417 | memmove(xs->here, xs->here + 1, | |
4418 | (void *)last - (void *)xs->here); | |
4419 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4420 | le16_add_cpu(&xh->xh_count, -1); | |
4421 | ||
4ac6032d | 4422 | ret = ocfs2_journal_dirty(handle, xs->bucket.bu_bhs[0]); |
01225596 TM |
4423 | if (ret < 0) |
4424 | mlog_errno(ret); | |
4425 | out_commit: | |
4426 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
4427 | } | |
4428 | ||
4429 | /* | |
4430 | * Set the xattr name/value in the bucket specified in xs. | |
4431 | * | |
4432 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4433 | * we divide the whole process into 3 steps: | |
4434 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4435 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4436 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4437 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4438 | * to free the xattr we allocated in set. | |
4439 | */ | |
4440 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4441 | struct ocfs2_xattr_info *xi, | |
4442 | struct ocfs2_xattr_search *xs) | |
4443 | { | |
5a095611 | 4444 | int ret, local = 1; |
01225596 TM |
4445 | size_t value_len; |
4446 | char *val = (char *)xi->value; | |
4447 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4448 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4449 | strlen(xi->name)); | |
01225596 TM |
4450 | |
4451 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4452 | /* | |
4453 | * We need to truncate the xattr storage first. | |
4454 | * | |
4455 | * If both the old and new value are stored to | |
4456 | * outside block, we only need to truncate | |
4457 | * the storage and then set the value outside. | |
4458 | * | |
4459 | * If the new value should be stored within block, | |
4460 | * we should free all the outside block first and | |
4461 | * the modification to the xattr block will be done | |
4462 | * by following steps. | |
4463 | */ | |
4464 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4465 | value_len = xi->value_len; | |
4466 | else | |
4467 | value_len = 0; | |
4468 | ||
4469 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4470 | value_len); | |
4471 | if (ret) | |
4472 | goto out; | |
4473 | ||
4474 | if (value_len) | |
4475 | goto set_value_outside; | |
4476 | } | |
4477 | ||
4478 | value_len = xi->value_len; | |
4479 | /* So we have to handle the inside block change now. */ | |
4480 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4481 | /* | |
4482 | * If the new value will be stored outside of block, | |
4483 | * initalize a new empty value root and insert it first. | |
4484 | */ | |
4485 | local = 0; | |
4486 | xi->value = &def_xv; | |
4487 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4488 | } | |
4489 | ||
5a095611 | 4490 | ret = ocfs2_xattr_set_entry_in_bucket(inode, xi, xs, name_hash, local); |
01225596 TM |
4491 | if (ret) { |
4492 | mlog_errno(ret); | |
4493 | goto out; | |
4494 | } | |
4495 | ||
5a095611 TM |
4496 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
4497 | goto out; | |
01225596 | 4498 | |
5a095611 TM |
4499 | /* allocate the space now for the outside block storage. */ |
4500 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4501 | value_len); | |
4502 | if (ret) { | |
4503 | mlog_errno(ret); | |
4504 | ||
4505 | if (xs->not_found) { | |
4506 | /* | |
4507 | * We can't allocate enough clusters for outside | |
4508 | * storage and we have allocated xattr already, | |
4509 | * so need to remove it. | |
4510 | */ | |
4511 | ocfs2_xattr_bucket_remove_xs(inode, xs); | |
01225596 | 4512 | } |
01225596 TM |
4513 | goto out; |
4514 | } | |
4515 | ||
4516 | set_value_outside: | |
4517 | ret = ocfs2_xattr_bucket_set_value_outside(inode, xs, val, value_len); | |
4518 | out: | |
4519 | return ret; | |
4520 | } | |
4521 | ||
80bcaf34 TM |
4522 | /* |
4523 | * check whether the xattr bucket is filled up with the same hash value. | |
4524 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
4525 | * If we want to insert a xattr with different hash value, go ahead | |
4526 | * and ocfs2_divide_xattr_bucket will handle this. | |
4527 | */ | |
01225596 | 4528 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
4529 | struct ocfs2_xattr_bucket *bucket, |
4530 | const char *name) | |
01225596 | 4531 | { |
3e632946 | 4532 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
4533 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
4534 | ||
4535 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
4536 | return 0; | |
01225596 TM |
4537 | |
4538 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
4539 | xh->xh_entries[0].xe_name_hash) { | |
4540 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
4541 | "hash = %u\n", | |
9c7759aa | 4542 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
4543 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
4544 | return -ENOSPC; | |
4545 | } | |
4546 | ||
4547 | return 0; | |
4548 | } | |
4549 | ||
4550 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
4551 | struct ocfs2_xattr_info *xi, | |
4552 | struct ocfs2_xattr_search *xs) | |
4553 | { | |
4554 | struct ocfs2_xattr_header *xh; | |
4555 | struct ocfs2_xattr_entry *xe; | |
4556 | u16 count, header_size, xh_free_start; | |
4557 | int i, free, max_free, need, old; | |
4558 | size_t value_size = 0, name_len = strlen(xi->name); | |
4559 | size_t blocksize = inode->i_sb->s_blocksize; | |
4560 | int ret, allocation = 0; | |
4561 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4562 | ||
4563 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
4564 | ||
4565 | try_again: | |
4566 | xh = xs->header; | |
4567 | count = le16_to_cpu(xh->xh_count); | |
4568 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4569 | header_size = sizeof(struct ocfs2_xattr_header) + | |
4570 | count * sizeof(struct ocfs2_xattr_entry); | |
4571 | max_free = OCFS2_XATTR_BUCKET_SIZE - | |
4572 | le16_to_cpu(xh->xh_name_value_len) - header_size; | |
4573 | ||
4574 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
4575 | "of %u which exceed block size\n", | |
9c7759aa | 4576 | (unsigned long long)bucket_blkno(&xs->bucket), |
01225596 TM |
4577 | header_size); |
4578 | ||
4579 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4580 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
4581 | else if (xi->value) | |
4582 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
4583 | ||
4584 | if (xs->not_found) | |
4585 | need = sizeof(struct ocfs2_xattr_entry) + | |
4586 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
4587 | else { | |
4588 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
4589 | ||
4590 | /* | |
4591 | * We only replace the old value if the new length is smaller | |
4592 | * than the old one. Otherwise we will allocate new space in the | |
4593 | * bucket to store it. | |
4594 | */ | |
4595 | xe = xs->here; | |
4596 | if (ocfs2_xattr_is_local(xe)) | |
4597 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4598 | else | |
4599 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4600 | ||
4601 | if (old >= value_size) | |
4602 | need = 0; | |
4603 | } | |
4604 | ||
4605 | free = xh_free_start - header_size; | |
4606 | /* | |
4607 | * We need to make sure the new name/value pair | |
4608 | * can exist in the same block. | |
4609 | */ | |
4610 | if (xh_free_start % blocksize < need) | |
4611 | free -= xh_free_start % blocksize; | |
4612 | ||
4613 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
4614 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
4615 | " %u\n", xs->not_found, | |
9c7759aa | 4616 | (unsigned long long)bucket_blkno(&xs->bucket), |
01225596 TM |
4617 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
4618 | le16_to_cpu(xh->xh_name_value_len)); | |
4619 | ||
4620 | if (free < need || count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4621 | if (need <= max_free && | |
4622 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4623 | /* | |
4624 | * We can create the space by defragment. Since only the | |
4625 | * name/value will be moved, the xe shouldn't be changed | |
4626 | * in xs. | |
4627 | */ | |
4628 | ret = ocfs2_defrag_xattr_bucket(inode, &xs->bucket); | |
4629 | if (ret) { | |
4630 | mlog_errno(ret); | |
4631 | goto out; | |
4632 | } | |
4633 | ||
4634 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4635 | free = xh_free_start - header_size; | |
4636 | if (xh_free_start % blocksize < need) | |
4637 | free -= xh_free_start % blocksize; | |
4638 | ||
4639 | if (free >= need) | |
4640 | goto xattr_set; | |
4641 | ||
4642 | mlog(0, "Can't get enough space for xattr insert by " | |
4643 | "defragment. Need %u bytes, but we have %d, so " | |
4644 | "allocate new bucket for it.\n", need, free); | |
4645 | } | |
4646 | ||
4647 | /* | |
4648 | * We have to add new buckets or clusters and one | |
4649 | * allocation should leave us enough space for insert. | |
4650 | */ | |
4651 | BUG_ON(allocation); | |
4652 | ||
4653 | /* | |
4654 | * We do not allow for overlapping ranges between buckets. And | |
4655 | * the maximum number of collisions we will allow for then is | |
4656 | * one bucket's worth, so check it here whether we need to | |
4657 | * add a new bucket for the insert. | |
4658 | */ | |
80bcaf34 TM |
4659 | ret = ocfs2_check_xattr_bucket_collision(inode, |
4660 | &xs->bucket, | |
4661 | xi->name); | |
01225596 TM |
4662 | if (ret) { |
4663 | mlog_errno(ret); | |
4664 | goto out; | |
4665 | } | |
4666 | ||
4667 | ret = ocfs2_add_new_xattr_bucket(inode, | |
4668 | xs->xattr_bh, | |
4ac6032d | 4669 | xs->bucket.bu_bhs[0]); |
01225596 TM |
4670 | if (ret) { |
4671 | mlog_errno(ret); | |
4672 | goto out; | |
4673 | } | |
4674 | ||
4675 | for (i = 0; i < blk_per_bucket; i++) | |
4ac6032d | 4676 | brelse(xs->bucket.bu_bhs[i]); |
01225596 TM |
4677 | |
4678 | memset(&xs->bucket, 0, sizeof(xs->bucket)); | |
4679 | ||
4680 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
4681 | xi->name_index, | |
4682 | xi->name, xs); | |
4683 | if (ret && ret != -ENODATA) | |
4684 | goto out; | |
4685 | xs->not_found = ret; | |
4686 | allocation = 1; | |
4687 | goto try_again; | |
4688 | } | |
4689 | ||
4690 | xattr_set: | |
4691 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs); | |
4692 | out: | |
4693 | mlog_exit(ret); | |
4694 | return ret; | |
4695 | } | |
a3944256 TM |
4696 | |
4697 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
4698 | struct ocfs2_xattr_bucket *bucket, | |
4699 | void *para) | |
4700 | { | |
4701 | int ret = 0; | |
3e632946 | 4702 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
4703 | u16 i; |
4704 | struct ocfs2_xattr_entry *xe; | |
4705 | ||
4706 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4707 | xe = &xh->xh_entries[i]; | |
4708 | if (ocfs2_xattr_is_local(xe)) | |
4709 | continue; | |
4710 | ||
4711 | ret = ocfs2_xattr_bucket_value_truncate(inode, | |
4ac6032d | 4712 | bucket->bu_bhs[0], |
a3944256 TM |
4713 | i, 0); |
4714 | if (ret) { | |
4715 | mlog_errno(ret); | |
4716 | break; | |
4717 | } | |
4718 | } | |
4719 | ||
4720 | return ret; | |
4721 | } | |
4722 | ||
4723 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
4724 | struct buffer_head *xb_bh) | |
4725 | { | |
4726 | struct ocfs2_xattr_block *xb = | |
4727 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4728 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
4729 | int ret = 0; | |
4730 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
4731 | u64 p_blkno; | |
4732 | ||
4733 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
4734 | return 0; | |
4735 | ||
4736 | while (name_hash > 0) { | |
4737 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4738 | &e_cpos, &num_clusters, el); | |
4739 | if (ret) { | |
4740 | mlog_errno(ret); | |
4741 | goto out; | |
4742 | } | |
4743 | ||
4744 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
4745 | ocfs2_delete_xattr_in_bucket, | |
4746 | NULL); | |
4747 | if (ret) { | |
4748 | mlog_errno(ret); | |
4749 | goto out; | |
4750 | } | |
4751 | ||
4752 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
4753 | p_blkno, e_cpos, num_clusters); | |
4754 | if (ret) { | |
4755 | mlog_errno(ret); | |
4756 | break; | |
4757 | } | |
4758 | ||
4759 | if (e_cpos == 0) | |
4760 | break; | |
4761 | ||
4762 | name_hash = e_cpos - 1; | |
4763 | } | |
4764 | ||
4765 | out: | |
4766 | return ret; | |
4767 | } | |
99219aea MF |
4768 | |
4769 | /* | |
4770 | * 'trusted' attributes support | |
4771 | */ | |
99219aea MF |
4772 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
4773 | size_t list_size, const char *name, | |
4774 | size_t name_len) | |
4775 | { | |
ceb1eba3 | 4776 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
4777 | const size_t total_len = prefix_len + name_len + 1; |
4778 | ||
4779 | if (list && total_len <= list_size) { | |
4780 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
4781 | memcpy(list + prefix_len, name, name_len); | |
4782 | list[prefix_len + name_len] = '\0'; | |
4783 | } | |
4784 | return total_len; | |
4785 | } | |
4786 | ||
4787 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
4788 | void *buffer, size_t size) | |
4789 | { | |
4790 | if (strcmp(name, "") == 0) | |
4791 | return -EINVAL; | |
4792 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
4793 | buffer, size); | |
4794 | } | |
4795 | ||
4796 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
4797 | const void *value, size_t size, int flags) | |
4798 | { | |
4799 | if (strcmp(name, "") == 0) | |
4800 | return -EINVAL; | |
4801 | ||
4802 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
4803 | size, flags); | |
4804 | } | |
4805 | ||
4806 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
4807 | .prefix = XATTR_TRUSTED_PREFIX, | |
4808 | .list = ocfs2_xattr_trusted_list, | |
4809 | .get = ocfs2_xattr_trusted_get, | |
4810 | .set = ocfs2_xattr_trusted_set, | |
4811 | }; | |
4812 | ||
99219aea MF |
4813 | /* |
4814 | * 'user' attributes support | |
4815 | */ | |
99219aea MF |
4816 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
4817 | size_t list_size, const char *name, | |
4818 | size_t name_len) | |
4819 | { | |
ceb1eba3 | 4820 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
4821 | const size_t total_len = prefix_len + name_len + 1; |
4822 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4823 | ||
4824 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4825 | return 0; | |
4826 | ||
4827 | if (list && total_len <= list_size) { | |
4828 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
4829 | memcpy(list + prefix_len, name, name_len); | |
4830 | list[prefix_len + name_len] = '\0'; | |
4831 | } | |
4832 | return total_len; | |
4833 | } | |
4834 | ||
4835 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
4836 | void *buffer, size_t size) | |
4837 | { | |
4838 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4839 | ||
4840 | if (strcmp(name, "") == 0) | |
4841 | return -EINVAL; | |
4842 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4843 | return -EOPNOTSUPP; | |
4844 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
4845 | buffer, size); | |
4846 | } | |
4847 | ||
4848 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
4849 | const void *value, size_t size, int flags) | |
4850 | { | |
4851 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4852 | ||
4853 | if (strcmp(name, "") == 0) | |
4854 | return -EINVAL; | |
4855 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4856 | return -EOPNOTSUPP; | |
4857 | ||
4858 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
4859 | size, flags); | |
4860 | } | |
4861 | ||
4862 | struct xattr_handler ocfs2_xattr_user_handler = { | |
4863 | .prefix = XATTR_USER_PREFIX, | |
4864 | .list = ocfs2_xattr_user_list, | |
4865 | .get = ocfs2_xattr_user_get, | |
4866 | .set = ocfs2_xattr_user_set, | |
4867 | }; |