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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 { |
ba937127 JB |
64 | /* The inode these xattrs are associated with */ |
65 | struct inode *bu_inode; | |
66 | ||
67 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 68 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
69 | |
70 | /* How many blocks make up one bucket for this filesystem */ | |
71 | int bu_blocks; | |
0c044f0b TM |
72 | }; |
73 | ||
cf1d6c76 TY |
74 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
75 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
76 | ||
77 | static struct ocfs2_xattr_def_value_root def_xv = { | |
78 | .xv.xr_list.l_count = cpu_to_le16(1), | |
79 | }; | |
80 | ||
81 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
82 | &ocfs2_xattr_user_handler, | |
83 | &ocfs2_xattr_trusted_handler, | |
84 | NULL | |
85 | }; | |
86 | ||
c988fd04 | 87 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 TY |
88 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
89 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, | |
90 | }; | |
91 | ||
92 | struct ocfs2_xattr_info { | |
93 | int name_index; | |
94 | const char *name; | |
95 | const void *value; | |
96 | size_t value_len; | |
97 | }; | |
98 | ||
99 | struct ocfs2_xattr_search { | |
100 | struct buffer_head *inode_bh; | |
101 | /* | |
102 | * xattr_bh point to the block buffer head which has extended attribute | |
103 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
104 | */ | |
105 | struct buffer_head *xattr_bh; | |
106 | struct ocfs2_xattr_header *header; | |
ba937127 | 107 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
108 | void *base; |
109 | void *end; | |
110 | struct ocfs2_xattr_entry *here; | |
111 | int not_found; | |
112 | }; | |
113 | ||
589dc260 TM |
114 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
115 | struct ocfs2_xattr_header *xh, | |
116 | int index, | |
117 | int *block_off, | |
118 | int *new_offset); | |
119 | ||
54f443f4 JB |
120 | static int ocfs2_xattr_block_find(struct inode *inode, |
121 | int name_index, | |
122 | const char *name, | |
123 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
124 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
125 | struct buffer_head *root_bh, | |
126 | int name_index, | |
127 | const char *name, | |
128 | struct ocfs2_xattr_search *xs); | |
129 | ||
0c044f0b TM |
130 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
131 | struct ocfs2_xattr_tree_root *xt, | |
132 | char *buffer, | |
133 | size_t buffer_size); | |
134 | ||
01225596 TM |
135 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
136 | struct ocfs2_xattr_search *xs); | |
137 | ||
138 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
139 | struct ocfs2_xattr_info *xi, | |
140 | struct ocfs2_xattr_search *xs); | |
141 | ||
a3944256 TM |
142 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
143 | struct buffer_head *xb_bh); | |
144 | ||
0030e001 TY |
145 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
146 | { | |
147 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
148 | } | |
149 | ||
150 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
151 | { | |
152 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
153 | } | |
154 | ||
155 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
156 | { | |
157 | u16 len = sb->s_blocksize - | |
158 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
159 | ||
160 | return len / sizeof(struct ocfs2_xattr_entry); | |
161 | } | |
162 | ||
9c7759aa | 163 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 164 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 165 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 166 | |
ba937127 | 167 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 168 | { |
ba937127 JB |
169 | struct ocfs2_xattr_bucket *bucket; |
170 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 171 | |
ba937127 JB |
172 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
173 | ||
174 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
175 | if (bucket) { | |
176 | bucket->bu_inode = inode; | |
177 | bucket->bu_blocks = blks; | |
178 | } | |
179 | ||
180 | return bucket; | |
181 | } | |
182 | ||
183 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
184 | { | |
185 | int i; | |
186 | ||
187 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
188 | brelse(bucket->bu_bhs[i]); |
189 | bucket->bu_bhs[i] = NULL; | |
190 | } | |
191 | } | |
192 | ||
ba937127 JB |
193 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
194 | { | |
195 | if (bucket) { | |
196 | ocfs2_xattr_bucket_relse(bucket); | |
197 | bucket->bu_inode = NULL; | |
198 | kfree(bucket); | |
199 | } | |
200 | } | |
201 | ||
784b816a JB |
202 | /* |
203 | * A bucket that has never been written to disk doesn't need to be | |
204 | * read. We just need the buffer_heads. Don't call this for | |
205 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
206 | * them fully. | |
207 | */ | |
ba937127 | 208 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
209 | u64 xb_blkno) |
210 | { | |
211 | int i, rc = 0; | |
784b816a | 212 | |
ba937127 JB |
213 | for (i = 0; i < bucket->bu_blocks; i++) { |
214 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
215 | xb_blkno + i); | |
784b816a JB |
216 | if (!bucket->bu_bhs[i]) { |
217 | rc = -EIO; | |
218 | mlog_errno(rc); | |
219 | break; | |
220 | } | |
221 | ||
757055ad TM |
222 | if (!ocfs2_buffer_uptodate(bucket->bu_inode, |
223 | bucket->bu_bhs[i])) | |
224 | ocfs2_set_new_buffer_uptodate(bucket->bu_inode, | |
225 | bucket->bu_bhs[i]); | |
784b816a JB |
226 | } |
227 | ||
228 | if (rc) | |
ba937127 | 229 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
230 | return rc; |
231 | } | |
232 | ||
233 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 234 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
235 | u64 xb_blkno) |
236 | { | |
ba937127 | 237 | int rc; |
784b816a | 238 | |
ba937127 JB |
239 | rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno, |
240 | bucket->bu_blocks, bucket->bu_bhs, 0); | |
784b816a | 241 | if (rc) |
ba937127 | 242 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
243 | return rc; |
244 | } | |
245 | ||
1224be02 | 246 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
247 | struct ocfs2_xattr_bucket *bucket, |
248 | int type) | |
249 | { | |
250 | int i, rc = 0; | |
1224be02 | 251 | |
ba937127 JB |
252 | for (i = 0; i < bucket->bu_blocks; i++) { |
253 | rc = ocfs2_journal_access(handle, bucket->bu_inode, | |
1224be02 JB |
254 | bucket->bu_bhs[i], type); |
255 | if (rc) { | |
256 | mlog_errno(rc); | |
257 | break; | |
258 | } | |
259 | } | |
260 | ||
261 | return rc; | |
262 | } | |
263 | ||
264 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
265 | struct ocfs2_xattr_bucket *bucket) |
266 | { | |
ba937127 | 267 | int i; |
1224be02 | 268 | |
ba937127 | 269 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
270 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
271 | } | |
272 | ||
ba937127 | 273 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
274 | struct ocfs2_xattr_bucket *src) |
275 | { | |
276 | int i; | |
ba937127 JB |
277 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
278 | ||
279 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
280 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 281 | |
ba937127 | 282 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
283 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
284 | blocksize); | |
285 | } | |
286 | } | |
1224be02 | 287 | |
936b8834 | 288 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
289 | { |
290 | struct xattr_handler *handler = NULL; | |
291 | ||
292 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
293 | handler = ocfs2_xattr_handler_map[name_index]; | |
294 | ||
936b8834 | 295 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
296 | } |
297 | ||
40daa16a | 298 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 299 | const char *name, |
40daa16a | 300 | int name_len) |
cf1d6c76 TY |
301 | { |
302 | /* Get hash value of uuid from super block */ | |
303 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
304 | int i; | |
305 | ||
cf1d6c76 TY |
306 | /* hash extended attribute name */ |
307 | for (i = 0; i < name_len; i++) { | |
308 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
309 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
310 | *name++; | |
311 | } | |
312 | ||
313 | return hash; | |
314 | } | |
315 | ||
316 | /* | |
317 | * ocfs2_xattr_hash_entry() | |
318 | * | |
319 | * Compute the hash of an extended attribute. | |
320 | */ | |
321 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
322 | struct ocfs2_xattr_header *header, | |
323 | struct ocfs2_xattr_entry *entry) | |
324 | { | |
325 | u32 hash = 0; | |
cf1d6c76 | 326 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 327 | |
2057e5c6 | 328 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
329 | entry->xe_name_hash = cpu_to_le32(hash); |
330 | ||
331 | return; | |
332 | } | |
f56654c4 TM |
333 | |
334 | static int ocfs2_xattr_extend_allocation(struct inode *inode, | |
335 | u32 clusters_to_add, | |
336 | struct buffer_head *xattr_bh, | |
337 | struct ocfs2_xattr_value_root *xv) | |
338 | { | |
339 | int status = 0; | |
340 | int restart_func = 0; | |
341 | int credits = 0; | |
342 | handle_t *handle = NULL; | |
343 | struct ocfs2_alloc_context *data_ac = NULL; | |
344 | struct ocfs2_alloc_context *meta_ac = NULL; | |
345 | enum ocfs2_alloc_restarted why; | |
346 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 | 347 | u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); |
f99b9b7c | 348 | struct ocfs2_extent_tree et; |
f56654c4 TM |
349 | |
350 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
351 | ||
8d6220d6 | 352 | ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
f99b9b7c | 353 | |
f56654c4 TM |
354 | restart_all: |
355 | ||
f99b9b7c JB |
356 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
357 | &data_ac, &meta_ac); | |
f56654c4 TM |
358 | if (status) { |
359 | mlog_errno(status); | |
360 | goto leave; | |
361 | } | |
362 | ||
f99b9b7c JB |
363 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
364 | clusters_to_add); | |
f56654c4 TM |
365 | handle = ocfs2_start_trans(osb, credits); |
366 | if (IS_ERR(handle)) { | |
367 | status = PTR_ERR(handle); | |
368 | handle = NULL; | |
369 | mlog_errno(status); | |
370 | goto leave; | |
371 | } | |
372 | ||
373 | restarted_transaction: | |
374 | status = ocfs2_journal_access(handle, inode, xattr_bh, | |
375 | OCFS2_JOURNAL_ACCESS_WRITE); | |
376 | if (status < 0) { | |
377 | mlog_errno(status); | |
378 | goto leave; | |
379 | } | |
380 | ||
381 | prev_clusters = le32_to_cpu(xv->xr_clusters); | |
382 | status = ocfs2_add_clusters_in_btree(osb, | |
383 | inode, | |
384 | &logical_start, | |
385 | clusters_to_add, | |
386 | 0, | |
f99b9b7c | 387 | &et, |
f56654c4 TM |
388 | handle, |
389 | data_ac, | |
390 | meta_ac, | |
f99b9b7c | 391 | &why); |
f56654c4 TM |
392 | if ((status < 0) && (status != -EAGAIN)) { |
393 | if (status != -ENOSPC) | |
394 | mlog_errno(status); | |
395 | goto leave; | |
396 | } | |
397 | ||
398 | status = ocfs2_journal_dirty(handle, xattr_bh); | |
399 | if (status < 0) { | |
400 | mlog_errno(status); | |
401 | goto leave; | |
402 | } | |
403 | ||
404 | clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; | |
405 | ||
406 | if (why != RESTART_NONE && clusters_to_add) { | |
407 | if (why == RESTART_META) { | |
408 | mlog(0, "restarting function.\n"); | |
409 | restart_func = 1; | |
410 | } else { | |
411 | BUG_ON(why != RESTART_TRANS); | |
412 | ||
413 | mlog(0, "restarting transaction.\n"); | |
414 | /* TODO: This can be more intelligent. */ | |
415 | credits = ocfs2_calc_extend_credits(osb->sb, | |
f99b9b7c | 416 | et.et_root_el, |
f56654c4 TM |
417 | clusters_to_add); |
418 | status = ocfs2_extend_trans(handle, credits); | |
419 | if (status < 0) { | |
420 | /* handle still has to be committed at | |
421 | * this point. */ | |
422 | status = -ENOMEM; | |
423 | mlog_errno(status); | |
424 | goto leave; | |
425 | } | |
426 | goto restarted_transaction; | |
427 | } | |
428 | } | |
429 | ||
430 | leave: | |
431 | if (handle) { | |
432 | ocfs2_commit_trans(osb, handle); | |
433 | handle = NULL; | |
434 | } | |
435 | if (data_ac) { | |
436 | ocfs2_free_alloc_context(data_ac); | |
437 | data_ac = NULL; | |
438 | } | |
439 | if (meta_ac) { | |
440 | ocfs2_free_alloc_context(meta_ac); | |
441 | meta_ac = NULL; | |
442 | } | |
443 | if ((!status) && restart_func) { | |
444 | restart_func = 0; | |
445 | goto restart_all; | |
446 | } | |
447 | ||
448 | return status; | |
449 | } | |
450 | ||
451 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
452 | struct buffer_head *root_bh, | |
453 | struct ocfs2_xattr_value_root *xv, | |
454 | u32 cpos, u32 phys_cpos, u32 len, | |
455 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
456 | { | |
457 | int ret; | |
458 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
459 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 TM |
460 | handle_t *handle; |
461 | struct ocfs2_alloc_context *meta_ac = NULL; | |
f99b9b7c JB |
462 | struct ocfs2_extent_tree et; |
463 | ||
8d6220d6 | 464 | ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
f56654c4 | 465 | |
f99b9b7c | 466 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
f56654c4 TM |
467 | if (ret) { |
468 | mlog_errno(ret); | |
469 | return ret; | |
470 | } | |
471 | ||
f56654c4 TM |
472 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); |
473 | if (IS_ERR(handle)) { | |
474 | ret = PTR_ERR(handle); | |
475 | mlog_errno(ret); | |
476 | goto out; | |
477 | } | |
478 | ||
479 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
480 | OCFS2_JOURNAL_ACCESS_WRITE); | |
481 | if (ret) { | |
482 | mlog_errno(ret); | |
483 | goto out_commit; | |
484 | } | |
485 | ||
f99b9b7c JB |
486 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
487 | dealloc); | |
f56654c4 TM |
488 | if (ret) { |
489 | mlog_errno(ret); | |
490 | goto out_commit; | |
491 | } | |
492 | ||
493 | le32_add_cpu(&xv->xr_clusters, -len); | |
494 | ||
495 | ret = ocfs2_journal_dirty(handle, root_bh); | |
496 | if (ret) { | |
497 | mlog_errno(ret); | |
498 | goto out_commit; | |
499 | } | |
500 | ||
c73f60f9 | 501 | ret = ocfs2_cache_cluster_dealloc(dealloc, phys_blkno, len); |
f56654c4 TM |
502 | if (ret) |
503 | mlog_errno(ret); | |
504 | ||
505 | out_commit: | |
506 | ocfs2_commit_trans(osb, handle); | |
507 | out: | |
f56654c4 TM |
508 | |
509 | if (meta_ac) | |
510 | ocfs2_free_alloc_context(meta_ac); | |
511 | ||
512 | return ret; | |
513 | } | |
514 | ||
515 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
516 | u32 old_clusters, | |
517 | u32 new_clusters, | |
518 | struct buffer_head *root_bh, | |
519 | struct ocfs2_xattr_value_root *xv) | |
520 | { | |
521 | int ret = 0; | |
522 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
523 | u64 block; | |
524 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
525 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
526 | ||
527 | ocfs2_init_dealloc_ctxt(&dealloc); | |
528 | ||
529 | if (old_clusters <= new_clusters) | |
530 | return 0; | |
531 | ||
532 | cpos = new_clusters; | |
533 | trunc_len = old_clusters - new_clusters; | |
534 | while (trunc_len) { | |
535 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
536 | &alloc_size, &xv->xr_list); | |
537 | if (ret) { | |
538 | mlog_errno(ret); | |
539 | goto out; | |
540 | } | |
541 | ||
542 | if (alloc_size > trunc_len) | |
543 | alloc_size = trunc_len; | |
544 | ||
545 | ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, | |
546 | phys_cpos, alloc_size, | |
547 | &dealloc); | |
548 | if (ret) { | |
549 | mlog_errno(ret); | |
550 | goto out; | |
551 | } | |
552 | ||
553 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
554 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
555 | alloc_size); | |
556 | cpos += alloc_size; | |
557 | trunc_len -= alloc_size; | |
558 | } | |
559 | ||
560 | out: | |
561 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
562 | ocfs2_run_deallocs(osb, &dealloc); | |
563 | ||
564 | return ret; | |
565 | } | |
566 | ||
567 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
568 | struct buffer_head *root_bh, | |
569 | struct ocfs2_xattr_value_root *xv, | |
570 | int len) | |
571 | { | |
572 | int ret; | |
573 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
574 | u32 old_clusters = le32_to_cpu(xv->xr_clusters); | |
575 | ||
576 | if (new_clusters == old_clusters) | |
577 | return 0; | |
578 | ||
579 | if (new_clusters > old_clusters) | |
580 | ret = ocfs2_xattr_extend_allocation(inode, | |
581 | new_clusters - old_clusters, | |
582 | root_bh, xv); | |
583 | else | |
584 | ret = ocfs2_xattr_shrink_size(inode, | |
585 | old_clusters, new_clusters, | |
586 | root_bh, xv); | |
587 | ||
588 | return ret; | |
589 | } | |
cf1d6c76 | 590 | |
936b8834 TM |
591 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
592 | size_t *result, const char *prefix, | |
593 | const char *name, int name_len) | |
594 | { | |
595 | char *p = buffer + *result; | |
596 | int prefix_len = strlen(prefix); | |
597 | int total_len = prefix_len + name_len + 1; | |
598 | ||
599 | *result += total_len; | |
600 | ||
601 | /* we are just looking for how big our buffer needs to be */ | |
602 | if (!size) | |
603 | return 0; | |
604 | ||
605 | if (*result > size) | |
606 | return -ERANGE; | |
607 | ||
608 | memcpy(p, prefix, prefix_len); | |
609 | memcpy(p + prefix_len, name, name_len); | |
610 | p[prefix_len + name_len] = '\0'; | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
cf1d6c76 TY |
615 | static int ocfs2_xattr_list_entries(struct inode *inode, |
616 | struct ocfs2_xattr_header *header, | |
617 | char *buffer, size_t buffer_size) | |
618 | { | |
936b8834 TM |
619 | size_t result = 0; |
620 | int i, type, ret; | |
621 | const char *prefix, *name; | |
cf1d6c76 TY |
622 | |
623 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
624 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
625 | type = ocfs2_xattr_get_type(entry); |
626 | prefix = ocfs2_xattr_prefix(type); | |
627 | ||
628 | if (prefix) { | |
629 | name = (const char *)header + | |
630 | le16_to_cpu(entry->xe_name_offset); | |
631 | ||
632 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
633 | &result, prefix, name, | |
634 | entry->xe_name_len); | |
635 | if (ret) | |
636 | return ret; | |
cf1d6c76 TY |
637 | } |
638 | } | |
639 | ||
936b8834 | 640 | return result; |
cf1d6c76 TY |
641 | } |
642 | ||
643 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
644 | struct ocfs2_dinode *di, | |
645 | char *buffer, | |
646 | size_t buffer_size) | |
647 | { | |
648 | struct ocfs2_xattr_header *header = NULL; | |
649 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
650 | int ret = 0; | |
651 | ||
652 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
653 | return ret; | |
654 | ||
655 | header = (struct ocfs2_xattr_header *) | |
656 | ((void *)di + inode->i_sb->s_blocksize - | |
657 | le16_to_cpu(di->i_xattr_inline_size)); | |
658 | ||
659 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
664 | static int ocfs2_xattr_block_list(struct inode *inode, | |
665 | struct ocfs2_dinode *di, | |
666 | char *buffer, | |
667 | size_t buffer_size) | |
668 | { | |
669 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 670 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
671 | int ret = 0; |
672 | ||
673 | if (!di->i_xattr_loc) | |
674 | return ret; | |
675 | ||
0fcaa56a | 676 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
677 | if (ret < 0) { |
678 | mlog_errno(ret); | |
679 | return ret; | |
680 | } | |
cf1d6c76 | 681 | |
0c044f0b | 682 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
f6087fb7 JB |
683 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
684 | ret = -EIO; | |
685 | goto cleanup; | |
686 | } | |
cf1d6c76 | 687 | |
0c044f0b TM |
688 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
689 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
690 | ret = ocfs2_xattr_list_entries(inode, header, | |
691 | buffer, buffer_size); | |
692 | } else { | |
693 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
694 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
695 | buffer, buffer_size); | |
696 | } | |
cf1d6c76 TY |
697 | cleanup: |
698 | brelse(blk_bh); | |
699 | ||
700 | return ret; | |
701 | } | |
702 | ||
703 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
704 | char *buffer, | |
705 | size_t size) | |
706 | { | |
707 | int ret = 0, i_ret = 0, b_ret = 0; | |
708 | struct buffer_head *di_bh = NULL; | |
709 | struct ocfs2_dinode *di = NULL; | |
710 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
711 | ||
8154da3d TY |
712 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
713 | return -EOPNOTSUPP; | |
714 | ||
cf1d6c76 TY |
715 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
716 | return ret; | |
717 | ||
718 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
719 | if (ret < 0) { | |
720 | mlog_errno(ret); | |
721 | return ret; | |
722 | } | |
723 | ||
724 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
725 | ||
726 | down_read(&oi->ip_xattr_sem); | |
727 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
728 | if (i_ret < 0) | |
729 | b_ret = 0; | |
730 | else { | |
731 | if (buffer) { | |
732 | buffer += i_ret; | |
733 | size -= i_ret; | |
734 | } | |
735 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
736 | buffer, size); | |
737 | if (b_ret < 0) | |
738 | i_ret = 0; | |
739 | } | |
740 | up_read(&oi->ip_xattr_sem); | |
741 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
742 | ||
743 | brelse(di_bh); | |
744 | ||
745 | return i_ret + b_ret; | |
746 | } | |
747 | ||
748 | static int ocfs2_xattr_find_entry(int name_index, | |
749 | const char *name, | |
750 | struct ocfs2_xattr_search *xs) | |
751 | { | |
752 | struct ocfs2_xattr_entry *entry; | |
753 | size_t name_len; | |
754 | int i, cmp = 1; | |
755 | ||
756 | if (name == NULL) | |
757 | return -EINVAL; | |
758 | ||
759 | name_len = strlen(name); | |
760 | entry = xs->here; | |
761 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
762 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
763 | if (!cmp) | |
764 | cmp = name_len - entry->xe_name_len; | |
765 | if (!cmp) | |
766 | cmp = memcmp(name, (xs->base + | |
767 | le16_to_cpu(entry->xe_name_offset)), | |
768 | name_len); | |
769 | if (cmp == 0) | |
770 | break; | |
771 | entry += 1; | |
772 | } | |
773 | xs->here = entry; | |
774 | ||
775 | return cmp ? -ENODATA : 0; | |
776 | } | |
777 | ||
778 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 779 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
780 | void *buffer, |
781 | size_t len) | |
782 | { | |
783 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
784 | u64 blkno; | |
785 | int i, ret = 0; | |
786 | size_t cplen, blocksize; | |
787 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
788 | struct ocfs2_extent_list *el; |
789 | ||
cf1d6c76 TY |
790 | el = &xv->xr_list; |
791 | clusters = le32_to_cpu(xv->xr_clusters); | |
792 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
793 | blocksize = inode->i_sb->s_blocksize; | |
794 | ||
795 | cpos = 0; | |
796 | while (cpos < clusters) { | |
797 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
798 | &num_clusters, el); | |
799 | if (ret) { | |
800 | mlog_errno(ret); | |
801 | goto out; | |
802 | } | |
803 | ||
804 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
805 | /* Copy ocfs2_xattr_value */ | |
806 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 807 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
808 | if (ret) { |
809 | mlog_errno(ret); | |
810 | goto out; | |
811 | } | |
812 | ||
813 | cplen = len >= blocksize ? blocksize : len; | |
814 | memcpy(buffer, bh->b_data, cplen); | |
815 | len -= cplen; | |
816 | buffer += cplen; | |
817 | ||
818 | brelse(bh); | |
819 | bh = NULL; | |
820 | if (len == 0) | |
821 | break; | |
822 | } | |
823 | cpos += num_clusters; | |
824 | } | |
825 | out: | |
826 | return ret; | |
827 | } | |
828 | ||
829 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
830 | int name_index, | |
831 | const char *name, | |
832 | void *buffer, | |
833 | size_t buffer_size, | |
834 | struct ocfs2_xattr_search *xs) | |
835 | { | |
836 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
837 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 838 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
839 | size_t size; |
840 | int ret = 0; | |
841 | ||
842 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
843 | return -ENODATA; | |
844 | ||
845 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
846 | xs->header = (struct ocfs2_xattr_header *) | |
847 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
848 | xs->base = (void *)xs->header; | |
849 | xs->here = xs->header->xh_entries; | |
850 | ||
851 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
852 | if (ret) | |
853 | return ret; | |
854 | size = le64_to_cpu(xs->here->xe_value_size); | |
855 | if (buffer) { | |
856 | if (size > buffer_size) | |
857 | return -ERANGE; | |
858 | if (ocfs2_xattr_is_local(xs->here)) { | |
859 | memcpy(buffer, (void *)xs->base + | |
860 | le16_to_cpu(xs->here->xe_name_offset) + | |
861 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
862 | } else { | |
589dc260 TM |
863 | xv = (struct ocfs2_xattr_value_root *) |
864 | (xs->base + le16_to_cpu( | |
865 | xs->here->xe_name_offset) + | |
866 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
867 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
868 | buffer, size); |
869 | if (ret < 0) { | |
870 | mlog_errno(ret); | |
871 | return ret; | |
872 | } | |
873 | } | |
874 | } | |
875 | ||
876 | return size; | |
877 | } | |
878 | ||
879 | static int ocfs2_xattr_block_get(struct inode *inode, | |
880 | int name_index, | |
881 | const char *name, | |
882 | void *buffer, | |
883 | size_t buffer_size, | |
884 | struct ocfs2_xattr_search *xs) | |
885 | { | |
cf1d6c76 | 886 | struct ocfs2_xattr_block *xb; |
589dc260 | 887 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 888 | size_t size; |
589dc260 | 889 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 | 890 | |
ba937127 JB |
891 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
892 | if (!xs->bucket) { | |
893 | ret = -ENOMEM; | |
894 | mlog_errno(ret); | |
895 | goto cleanup; | |
896 | } | |
589dc260 | 897 | |
54f443f4 JB |
898 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
899 | if (ret) { | |
cf1d6c76 | 900 | mlog_errno(ret); |
cf1d6c76 TY |
901 | goto cleanup; |
902 | } | |
903 | ||
6c1e183e TY |
904 | if (xs->not_found) { |
905 | ret = -ENODATA; | |
906 | goto cleanup; | |
907 | } | |
908 | ||
54f443f4 | 909 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
910 | size = le64_to_cpu(xs->here->xe_value_size); |
911 | if (buffer) { | |
912 | ret = -ERANGE; | |
913 | if (size > buffer_size) | |
914 | goto cleanup; | |
589dc260 TM |
915 | |
916 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
917 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
918 | i = xs->here - xs->header->xh_entries; | |
919 | ||
920 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
921 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 922 | bucket_xh(xs->bucket), |
589dc260 TM |
923 | i, |
924 | &block_off, | |
925 | &name_offset); | |
ba937127 | 926 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 927 | } |
cf1d6c76 TY |
928 | if (ocfs2_xattr_is_local(xs->here)) { |
929 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 930 | name_offset + name_len, size); |
cf1d6c76 | 931 | } else { |
589dc260 TM |
932 | xv = (struct ocfs2_xattr_value_root *) |
933 | (xs->base + name_offset + name_len); | |
934 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
935 | buffer, size); |
936 | if (ret < 0) { | |
937 | mlog_errno(ret); | |
938 | goto cleanup; | |
939 | } | |
940 | } | |
941 | } | |
942 | ret = size; | |
943 | cleanup: | |
ba937127 | 944 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 945 | |
54f443f4 JB |
946 | brelse(xs->xattr_bh); |
947 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
948 | return ret; |
949 | } | |
950 | ||
951 | /* ocfs2_xattr_get() | |
952 | * | |
953 | * Copy an extended attribute into the buffer provided. | |
954 | * Buffer is NULL to compute the size of buffer required. | |
955 | */ | |
0030e001 TY |
956 | static int ocfs2_xattr_get(struct inode *inode, |
957 | int name_index, | |
958 | const char *name, | |
959 | void *buffer, | |
960 | size_t buffer_size) | |
cf1d6c76 TY |
961 | { |
962 | int ret; | |
963 | struct ocfs2_dinode *di = NULL; | |
964 | struct buffer_head *di_bh = NULL; | |
965 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
966 | struct ocfs2_xattr_search xis = { | |
967 | .not_found = -ENODATA, | |
968 | }; | |
969 | struct ocfs2_xattr_search xbs = { | |
970 | .not_found = -ENODATA, | |
971 | }; | |
972 | ||
8154da3d TY |
973 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
974 | return -EOPNOTSUPP; | |
975 | ||
cf1d6c76 TY |
976 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
977 | ret = -ENODATA; | |
978 | ||
979 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
980 | if (ret < 0) { | |
981 | mlog_errno(ret); | |
982 | return ret; | |
983 | } | |
984 | xis.inode_bh = xbs.inode_bh = di_bh; | |
985 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
986 | ||
987 | down_read(&oi->ip_xattr_sem); | |
988 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
989 | buffer_size, &xis); | |
6c1e183e | 990 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
991 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
992 | buffer_size, &xbs); | |
993 | up_read(&oi->ip_xattr_sem); | |
994 | ocfs2_inode_unlock(inode, 0); | |
995 | ||
996 | brelse(di_bh); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
1002 | struct ocfs2_xattr_value_root *xv, | |
1003 | const void *value, | |
1004 | int value_len) | |
1005 | { | |
1006 | int ret = 0, i, cp_len, credits; | |
1007 | u16 blocksize = inode->i_sb->s_blocksize; | |
1008 | u32 p_cluster, num_clusters; | |
1009 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1010 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1011 | u64 blkno; | |
1012 | struct buffer_head *bh = NULL; | |
1013 | handle_t *handle; | |
1014 | ||
1015 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1016 | ||
1017 | credits = clusters * bpc; | |
1018 | handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); | |
1019 | if (IS_ERR(handle)) { | |
1020 | ret = PTR_ERR(handle); | |
1021 | mlog_errno(ret); | |
1022 | goto out; | |
1023 | } | |
1024 | ||
1025 | while (cpos < clusters) { | |
1026 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1027 | &num_clusters, &xv->xr_list); | |
1028 | if (ret) { | |
1029 | mlog_errno(ret); | |
1030 | goto out_commit; | |
1031 | } | |
1032 | ||
1033 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1034 | ||
1035 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 1036 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
1037 | if (ret) { |
1038 | mlog_errno(ret); | |
1039 | goto out_commit; | |
1040 | } | |
1041 | ||
1042 | ret = ocfs2_journal_access(handle, | |
1043 | inode, | |
1044 | bh, | |
1045 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1046 | if (ret < 0) { | |
1047 | mlog_errno(ret); | |
1048 | goto out_commit; | |
1049 | } | |
1050 | ||
1051 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1052 | memcpy(bh->b_data, value, cp_len); | |
1053 | value_len -= cp_len; | |
1054 | value += cp_len; | |
1055 | if (cp_len < blocksize) | |
1056 | memset(bh->b_data + cp_len, 0, | |
1057 | blocksize - cp_len); | |
1058 | ||
1059 | ret = ocfs2_journal_dirty(handle, bh); | |
1060 | if (ret < 0) { | |
1061 | mlog_errno(ret); | |
1062 | goto out_commit; | |
1063 | } | |
1064 | brelse(bh); | |
1065 | bh = NULL; | |
1066 | ||
1067 | /* | |
1068 | * XXX: do we need to empty all the following | |
1069 | * blocks in this cluster? | |
1070 | */ | |
1071 | if (!value_len) | |
1072 | break; | |
1073 | } | |
1074 | cpos += num_clusters; | |
1075 | } | |
1076 | out_commit: | |
1077 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1078 | out: | |
1079 | brelse(bh); | |
1080 | ||
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
1085 | struct ocfs2_xattr_info *xi, | |
1086 | struct ocfs2_xattr_search *xs, | |
1087 | size_t offs) | |
1088 | { | |
1089 | handle_t *handle = NULL; | |
1090 | int ret = 0; | |
1091 | size_t name_len = strlen(xi->name); | |
1092 | void *val = xs->base + offs; | |
1093 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1094 | ||
1095 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1096 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1097 | if (IS_ERR(handle)) { | |
1098 | ret = PTR_ERR(handle); | |
1099 | mlog_errno(ret); | |
1100 | goto out; | |
1101 | } | |
1102 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1103 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1104 | if (ret) { | |
1105 | mlog_errno(ret); | |
1106 | goto out_commit; | |
1107 | } | |
1108 | /* Decrease xattr count */ | |
1109 | le16_add_cpu(&xs->header->xh_count, -1); | |
1110 | /* Remove the xattr entry and tree root which has already be set*/ | |
1111 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1112 | memset(val, 0, size); | |
1113 | ||
1114 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1115 | if (ret < 0) | |
1116 | mlog_errno(ret); | |
1117 | out_commit: | |
1118 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1119 | out: | |
1120 | return ret; | |
1121 | } | |
1122 | ||
1123 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
1124 | struct ocfs2_xattr_info *xi, | |
1125 | struct ocfs2_xattr_search *xs, | |
1126 | size_t offs) | |
1127 | { | |
1128 | handle_t *handle = NULL; | |
1129 | int ret = 0; | |
1130 | ||
1131 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1132 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1133 | if (IS_ERR(handle)) { | |
1134 | ret = PTR_ERR(handle); | |
1135 | mlog_errno(ret); | |
1136 | goto out; | |
1137 | } | |
1138 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1139 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1140 | if (ret) { | |
1141 | mlog_errno(ret); | |
1142 | goto out_commit; | |
1143 | } | |
1144 | ||
1145 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1146 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1147 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1148 | ocfs2_xattr_set_local(xs->here, 1); | |
1149 | else | |
1150 | ocfs2_xattr_set_local(xs->here, 0); | |
1151 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1152 | ||
1153 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1154 | if (ret < 0) | |
1155 | mlog_errno(ret); | |
1156 | out_commit: | |
1157 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1158 | out: | |
1159 | return ret; | |
1160 | } | |
1161 | ||
1162 | /* | |
1163 | * ocfs2_xattr_set_value_outside() | |
1164 | * | |
1165 | * Set large size value in B tree. | |
1166 | */ | |
1167 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1168 | struct ocfs2_xattr_info *xi, | |
1169 | struct ocfs2_xattr_search *xs, | |
1170 | size_t offs) | |
1171 | { | |
1172 | size_t name_len = strlen(xi->name); | |
1173 | void *val = xs->base + offs; | |
1174 | struct ocfs2_xattr_value_root *xv = NULL; | |
1175 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1176 | int ret = 0; | |
1177 | ||
1178 | memset(val, 0, size); | |
1179 | memcpy(val, xi->name, name_len); | |
1180 | xv = (struct ocfs2_xattr_value_root *) | |
1181 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1182 | xv->xr_clusters = 0; | |
1183 | xv->xr_last_eb_blk = 0; | |
1184 | xv->xr_list.l_tree_depth = 0; | |
1185 | xv->xr_list.l_count = cpu_to_le16(1); | |
1186 | xv->xr_list.l_next_free_rec = 0; | |
1187 | ||
1188 | ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
1189 | xi->value_len); | |
1190 | if (ret < 0) { | |
1191 | mlog_errno(ret); | |
1192 | return ret; | |
1193 | } | |
1194 | ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, | |
1195 | xi->value_len); | |
1196 | if (ret < 0) { | |
1197 | mlog_errno(ret); | |
1198 | return ret; | |
1199 | } | |
1200 | ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); | |
1201 | if (ret < 0) | |
1202 | mlog_errno(ret); | |
1203 | ||
1204 | return ret; | |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * ocfs2_xattr_set_entry_local() | |
1209 | * | |
1210 | * Set, replace or remove extended attribute in local. | |
1211 | */ | |
1212 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1213 | struct ocfs2_xattr_info *xi, | |
1214 | struct ocfs2_xattr_search *xs, | |
1215 | struct ocfs2_xattr_entry *last, | |
1216 | size_t min_offs) | |
1217 | { | |
1218 | size_t name_len = strlen(xi->name); | |
1219 | int i; | |
1220 | ||
1221 | if (xi->value && xs->not_found) { | |
1222 | /* Insert the new xattr entry. */ | |
1223 | le16_add_cpu(&xs->header->xh_count, 1); | |
1224 | ocfs2_xattr_set_type(last, xi->name_index); | |
1225 | ocfs2_xattr_set_local(last, 1); | |
1226 | last->xe_name_len = name_len; | |
1227 | } else { | |
1228 | void *first_val; | |
1229 | void *val; | |
1230 | size_t offs, size; | |
1231 | ||
1232 | first_val = xs->base + min_offs; | |
1233 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1234 | val = xs->base + offs; | |
1235 | ||
1236 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1237 | OCFS2_XATTR_INLINE_SIZE) | |
1238 | size = OCFS2_XATTR_SIZE(name_len) + | |
1239 | OCFS2_XATTR_ROOT_SIZE; | |
1240 | else | |
1241 | size = OCFS2_XATTR_SIZE(name_len) + | |
1242 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1243 | ||
1244 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1245 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1246 | /* The old and the new value have the | |
1247 | same size. Just replace the value. */ | |
1248 | ocfs2_xattr_set_local(xs->here, 1); | |
1249 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1250 | /* Clear value bytes. */ | |
1251 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1252 | 0, | |
1253 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1254 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1255 | xi->value, | |
1256 | xi->value_len); | |
1257 | return; | |
1258 | } | |
1259 | /* Remove the old name+value. */ | |
1260 | memmove(first_val + size, first_val, val - first_val); | |
1261 | memset(first_val, 0, size); | |
1262 | xs->here->xe_name_hash = 0; | |
1263 | xs->here->xe_name_offset = 0; | |
1264 | ocfs2_xattr_set_local(xs->here, 1); | |
1265 | xs->here->xe_value_size = 0; | |
1266 | ||
1267 | min_offs += size; | |
1268 | ||
1269 | /* Adjust all value offsets. */ | |
1270 | last = xs->header->xh_entries; | |
1271 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1272 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1273 | ||
1274 | if (o < offs) | |
1275 | last->xe_name_offset = cpu_to_le16(o + size); | |
1276 | last += 1; | |
1277 | } | |
1278 | ||
1279 | if (!xi->value) { | |
1280 | /* Remove the old entry. */ | |
1281 | last -= 1; | |
1282 | memmove(xs->here, xs->here + 1, | |
1283 | (void *)last - (void *)xs->here); | |
1284 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1285 | le16_add_cpu(&xs->header->xh_count, -1); | |
1286 | } | |
1287 | } | |
1288 | if (xi->value) { | |
1289 | /* Insert the new name+value. */ | |
1290 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1291 | OCFS2_XATTR_SIZE(xi->value_len); | |
1292 | void *val = xs->base + min_offs - size; | |
1293 | ||
1294 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1295 | memset(val, 0, size); | |
1296 | memcpy(val, xi->name, name_len); | |
1297 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1298 | xi->value, | |
1299 | xi->value_len); | |
1300 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1301 | ocfs2_xattr_set_local(xs->here, 1); | |
1302 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1303 | } | |
1304 | ||
1305 | return; | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * ocfs2_xattr_set_entry() | |
1310 | * | |
1311 | * Set extended attribute entry into inode or block. | |
1312 | * | |
1313 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1314 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1315 | * then set value in B tree with set_value_outside(). | |
1316 | */ | |
1317 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1318 | struct ocfs2_xattr_info *xi, | |
1319 | struct ocfs2_xattr_search *xs, | |
1320 | int flag) | |
1321 | { | |
1322 | struct ocfs2_xattr_entry *last; | |
1323 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1324 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1325 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1326 | size_t size_l = 0; | |
1327 | handle_t *handle = NULL; | |
1328 | int free, i, ret; | |
1329 | struct ocfs2_xattr_info xi_l = { | |
1330 | .name_index = xi->name_index, | |
1331 | .name = xi->name, | |
1332 | .value = xi->value, | |
1333 | .value_len = xi->value_len, | |
1334 | }; | |
1335 | ||
1336 | /* Compute min_offs, last and free space. */ | |
1337 | last = xs->header->xh_entries; | |
1338 | ||
1339 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1340 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1341 | if (offs < min_offs) | |
1342 | min_offs = offs; | |
1343 | last += 1; | |
1344 | } | |
1345 | ||
1346 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1347 | if (free < 0) | |
b37c4d84 | 1348 | return -EIO; |
cf1d6c76 TY |
1349 | |
1350 | if (!xs->not_found) { | |
1351 | size_t size = 0; | |
1352 | if (ocfs2_xattr_is_local(xs->here)) | |
1353 | size = OCFS2_XATTR_SIZE(name_len) + | |
1354 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1355 | else | |
1356 | size = OCFS2_XATTR_SIZE(name_len) + | |
1357 | OCFS2_XATTR_ROOT_SIZE; | |
1358 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1359 | } | |
1360 | /* Check free space in inode or block */ | |
1361 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1362 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1363 | OCFS2_XATTR_SIZE(name_len) + | |
1364 | OCFS2_XATTR_ROOT_SIZE) { | |
1365 | ret = -ENOSPC; | |
1366 | goto out; | |
1367 | } | |
1368 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1369 | xi_l.value = (void *)&def_xv; | |
1370 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1371 | } else if (xi->value) { | |
1372 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1373 | OCFS2_XATTR_SIZE(name_len) + | |
1374 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1375 | ret = -ENOSPC; | |
1376 | goto out; | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | if (!xs->not_found) { | |
1381 | /* For existing extended attribute */ | |
1382 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1383 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1384 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1385 | void *val = xs->base + offs; | |
1386 | ||
1387 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1388 | /* Replace existing local xattr with tree root */ | |
1389 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
1390 | offs); | |
1391 | if (ret < 0) | |
1392 | mlog_errno(ret); | |
1393 | goto out; | |
1394 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1395 | /* For existing xattr which has value outside */ | |
1396 | struct ocfs2_xattr_value_root *xv = NULL; | |
1397 | xv = (struct ocfs2_xattr_value_root *)(val + | |
1398 | OCFS2_XATTR_SIZE(name_len)); | |
1399 | ||
1400 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1401 | /* | |
1402 | * If new value need set outside also, | |
1403 | * first truncate old value to new value, | |
1404 | * then set new value with set_value_outside(). | |
1405 | */ | |
1406 | ret = ocfs2_xattr_value_truncate(inode, | |
1407 | xs->xattr_bh, | |
1408 | xv, | |
1409 | xi->value_len); | |
1410 | if (ret < 0) { | |
1411 | mlog_errno(ret); | |
1412 | goto out; | |
1413 | } | |
1414 | ||
1415 | ret = __ocfs2_xattr_set_value_outside(inode, | |
1416 | xv, | |
1417 | xi->value, | |
1418 | xi->value_len); | |
1419 | if (ret < 0) { | |
1420 | mlog_errno(ret); | |
1421 | goto out; | |
1422 | } | |
1423 | ||
1424 | ret = ocfs2_xattr_update_entry(inode, | |
1425 | xi, | |
1426 | xs, | |
1427 | offs); | |
1428 | if (ret < 0) | |
1429 | mlog_errno(ret); | |
1430 | goto out; | |
1431 | } else { | |
1432 | /* | |
1433 | * If new value need set in local, | |
1434 | * just trucate old value to zero. | |
1435 | */ | |
1436 | ret = ocfs2_xattr_value_truncate(inode, | |
1437 | xs->xattr_bh, | |
1438 | xv, | |
1439 | 0); | |
1440 | if (ret < 0) | |
1441 | mlog_errno(ret); | |
1442 | } | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1447 | OCFS2_INODE_UPDATE_CREDITS); | |
1448 | if (IS_ERR(handle)) { | |
1449 | ret = PTR_ERR(handle); | |
1450 | mlog_errno(ret); | |
1451 | goto out; | |
1452 | } | |
1453 | ||
1454 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1455 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1456 | if (ret) { | |
1457 | mlog_errno(ret); | |
1458 | goto out_commit; | |
1459 | } | |
1460 | ||
1461 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
28b8ca0b | 1462 | /* set extended attribute in external block. */ |
cf1d6c76 | 1463 | ret = ocfs2_extend_trans(handle, |
28b8ca0b | 1464 | OCFS2_INODE_UPDATE_CREDITS + |
cf1d6c76 TY |
1465 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); |
1466 | if (ret) { | |
1467 | mlog_errno(ret); | |
1468 | goto out_commit; | |
1469 | } | |
1470 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1471 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1472 | if (ret) { | |
1473 | mlog_errno(ret); | |
1474 | goto out_commit; | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | /* | |
1479 | * Set value in local, include set tree root in local. | |
1480 | * This is the first step for value size >INLINE_SIZE. | |
1481 | */ | |
1482 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1483 | ||
1484 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1485 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1486 | if (ret < 0) { | |
1487 | mlog_errno(ret); | |
1488 | goto out_commit; | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1493 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1494 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1495 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1496 | ||
1497 | /* | |
1498 | * Adjust extent record count or inline data size | |
1499 | * to reserve space for extended attribute. | |
1500 | */ | |
1501 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1502 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1503 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1504 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1505 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1506 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1507 | sizeof(struct ocfs2_extent_rec))); | |
1508 | } | |
1509 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1510 | } | |
1511 | /* Update xattr flag */ | |
1512 | spin_lock(&oi->ip_lock); | |
1513 | oi->ip_dyn_features |= flag; | |
1514 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1515 | spin_unlock(&oi->ip_lock); | |
1516 | /* Update inode ctime */ | |
1517 | inode->i_ctime = CURRENT_TIME; | |
1518 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1519 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1520 | ||
1521 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1522 | if (ret < 0) | |
1523 | mlog_errno(ret); | |
1524 | ||
1525 | out_commit: | |
1526 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1527 | ||
1528 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1529 | /* | |
1530 | * Set value outside in B tree. | |
1531 | * This is the second step for value size > INLINE_SIZE. | |
1532 | */ | |
1533 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1534 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs); | |
1535 | if (ret < 0) { | |
1536 | int ret2; | |
1537 | ||
1538 | mlog_errno(ret); | |
1539 | /* | |
1540 | * If set value outside failed, we have to clean | |
1541 | * the junk tree root we have already set in local. | |
1542 | */ | |
1543 | ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs); | |
1544 | if (ret2 < 0) | |
1545 | mlog_errno(ret2); | |
1546 | } | |
1547 | } | |
1548 | out: | |
1549 | return ret; | |
1550 | ||
1551 | } | |
1552 | ||
cf1d6c76 TY |
1553 | static int ocfs2_remove_value_outside(struct inode*inode, |
1554 | struct buffer_head *bh, | |
1555 | struct ocfs2_xattr_header *header) | |
1556 | { | |
1557 | int ret = 0, i; | |
1558 | ||
1559 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1560 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1561 | ||
1562 | if (!ocfs2_xattr_is_local(entry)) { | |
1563 | struct ocfs2_xattr_value_root *xv; | |
1564 | void *val; | |
1565 | ||
1566 | val = (void *)header + | |
1567 | le16_to_cpu(entry->xe_name_offset); | |
1568 | xv = (struct ocfs2_xattr_value_root *) | |
1569 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1570 | ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0); | |
1571 | if (ret < 0) { | |
1572 | mlog_errno(ret); | |
1573 | return ret; | |
1574 | } | |
1575 | } | |
1576 | } | |
1577 | ||
1578 | return ret; | |
1579 | } | |
1580 | ||
1581 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1582 | struct buffer_head *di_bh) | |
1583 | { | |
1584 | ||
1585 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1586 | struct ocfs2_xattr_header *header; | |
1587 | int ret; | |
1588 | ||
1589 | header = (struct ocfs2_xattr_header *) | |
1590 | ((void *)di + inode->i_sb->s_blocksize - | |
1591 | le16_to_cpu(di->i_xattr_inline_size)); | |
1592 | ||
1593 | ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1594 | ||
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1599 | struct buffer_head *blk_bh) | |
1600 | { | |
1601 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 TY |
1602 | int ret = 0; |
1603 | ||
1604 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1605 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1606 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
1607 | ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1608 | } else | |
1609 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1610 | |
1611 | return ret; | |
1612 | } | |
1613 | ||
08413899 TM |
1614 | static int ocfs2_xattr_free_block(struct inode *inode, |
1615 | u64 block) | |
1616 | { | |
1617 | struct inode *xb_alloc_inode; | |
1618 | struct buffer_head *xb_alloc_bh = NULL; | |
1619 | struct buffer_head *blk_bh = NULL; | |
1620 | struct ocfs2_xattr_block *xb; | |
1621 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1622 | handle_t *handle; | |
1623 | int ret = 0; | |
1624 | u64 blk, bg_blkno; | |
1625 | u16 bit; | |
1626 | ||
0fcaa56a | 1627 | ret = ocfs2_read_block(inode, block, &blk_bh); |
08413899 TM |
1628 | if (ret < 0) { |
1629 | mlog_errno(ret); | |
1630 | goto out; | |
1631 | } | |
1632 | ||
f6087fb7 JB |
1633 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
1634 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
1635 | ret = -EIO; | |
08413899 TM |
1636 | goto out; |
1637 | } | |
1638 | ||
1639 | ret = ocfs2_xattr_block_remove(inode, blk_bh); | |
1640 | if (ret < 0) { | |
1641 | mlog_errno(ret); | |
1642 | goto out; | |
1643 | } | |
1644 | ||
08413899 TM |
1645 | blk = le64_to_cpu(xb->xb_blkno); |
1646 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1647 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1648 | ||
1649 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1650 | EXTENT_ALLOC_SYSTEM_INODE, | |
1651 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1652 | if (!xb_alloc_inode) { | |
1653 | ret = -ENOMEM; | |
1654 | mlog_errno(ret); | |
1655 | goto out; | |
1656 | } | |
1657 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1658 | ||
1659 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1660 | if (ret < 0) { | |
1661 | mlog_errno(ret); | |
1662 | goto out_mutex; | |
1663 | } | |
1664 | ||
1665 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1666 | if (IS_ERR(handle)) { | |
1667 | ret = PTR_ERR(handle); | |
1668 | mlog_errno(ret); | |
1669 | goto out_unlock; | |
1670 | } | |
1671 | ||
1672 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1673 | bit, bg_blkno, 1); | |
1674 | if (ret < 0) | |
1675 | mlog_errno(ret); | |
1676 | ||
1677 | ocfs2_commit_trans(osb, handle); | |
1678 | out_unlock: | |
1679 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1680 | brelse(xb_alloc_bh); | |
1681 | out_mutex: | |
1682 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1683 | iput(xb_alloc_inode); | |
1684 | out: | |
1685 | brelse(blk_bh); | |
1686 | return ret; | |
1687 | } | |
1688 | ||
cf1d6c76 TY |
1689 | /* |
1690 | * ocfs2_xattr_remove() | |
1691 | * | |
1692 | * Free extended attribute resources associated with this inode. | |
1693 | */ | |
1694 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1695 | { | |
cf1d6c76 TY |
1696 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1697 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1698 | handle_t *handle; | |
1699 | int ret; | |
1700 | ||
8154da3d TY |
1701 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1702 | return 0; | |
1703 | ||
cf1d6c76 TY |
1704 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1705 | return 0; | |
1706 | ||
1707 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1708 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1709 | if (ret < 0) { | |
1710 | mlog_errno(ret); | |
1711 | goto out; | |
1712 | } | |
1713 | } | |
cf1d6c76 | 1714 | |
08413899 TM |
1715 | if (di->i_xattr_loc) { |
1716 | ret = ocfs2_xattr_free_block(inode, | |
1717 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1718 | if (ret < 0) { |
1719 | mlog_errno(ret); | |
1720 | goto out; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1725 | OCFS2_INODE_UPDATE_CREDITS); | |
1726 | if (IS_ERR(handle)) { | |
1727 | ret = PTR_ERR(handle); | |
1728 | mlog_errno(ret); | |
1729 | goto out; | |
1730 | } | |
1731 | ret = ocfs2_journal_access(handle, inode, di_bh, | |
1732 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1733 | if (ret) { | |
1734 | mlog_errno(ret); | |
1735 | goto out_commit; | |
1736 | } | |
1737 | ||
08413899 | 1738 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1739 | |
1740 | spin_lock(&oi->ip_lock); | |
1741 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1742 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1743 | spin_unlock(&oi->ip_lock); | |
1744 | ||
1745 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1746 | if (ret < 0) | |
1747 | mlog_errno(ret); | |
1748 | out_commit: | |
1749 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1750 | out: | |
cf1d6c76 TY |
1751 | return ret; |
1752 | } | |
1753 | ||
1754 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1755 | struct ocfs2_dinode *di) | |
1756 | { | |
1757 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1758 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1759 | int free; | |
1760 | ||
1761 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1762 | return 0; | |
1763 | ||
1764 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1765 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1766 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1767 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1768 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1769 | le64_to_cpu(di->i_size); | |
1770 | } else { | |
1771 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1772 | free = (le16_to_cpu(el->l_count) - | |
1773 | le16_to_cpu(el->l_next_free_rec)) * | |
1774 | sizeof(struct ocfs2_extent_rec); | |
1775 | } | |
1776 | if (free >= xattrsize) | |
1777 | return 1; | |
1778 | ||
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | /* | |
1783 | * ocfs2_xattr_ibody_find() | |
1784 | * | |
1785 | * Find extended attribute in inode block and | |
1786 | * fill search info into struct ocfs2_xattr_search. | |
1787 | */ | |
1788 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1789 | int name_index, | |
1790 | const char *name, | |
1791 | struct ocfs2_xattr_search *xs) | |
1792 | { | |
1793 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1794 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1795 | int ret; | |
1796 | int has_space = 0; | |
1797 | ||
1798 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1799 | return 0; | |
1800 | ||
1801 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1802 | down_read(&oi->ip_alloc_sem); | |
1803 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1804 | up_read(&oi->ip_alloc_sem); | |
1805 | if (!has_space) | |
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | xs->xattr_bh = xs->inode_bh; | |
1810 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1811 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1812 | xs->header = (struct ocfs2_xattr_header *) | |
1813 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1814 | else | |
1815 | xs->header = (struct ocfs2_xattr_header *) | |
1816 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1817 | xs->base = (void *)xs->header; | |
1818 | xs->here = xs->header->xh_entries; | |
1819 | ||
1820 | /* Find the named attribute. */ | |
1821 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1822 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1823 | if (ret && ret != -ENODATA) | |
1824 | return ret; | |
1825 | xs->not_found = ret; | |
1826 | } | |
1827 | ||
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * ocfs2_xattr_ibody_set() | |
1833 | * | |
1834 | * Set, replace or remove an extended attribute into inode block. | |
1835 | * | |
1836 | */ | |
1837 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
1838 | struct ocfs2_xattr_info *xi, | |
1839 | struct ocfs2_xattr_search *xs) | |
1840 | { | |
1841 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1842 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1843 | int ret; | |
1844 | ||
1845 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1846 | return -ENOSPC; | |
1847 | ||
1848 | down_write(&oi->ip_alloc_sem); | |
1849 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1850 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
1851 | ret = -ENOSPC; | |
1852 | goto out; | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | ret = ocfs2_xattr_set_entry(inode, xi, xs, | |
1857 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); | |
1858 | out: | |
1859 | up_write(&oi->ip_alloc_sem); | |
1860 | ||
1861 | return ret; | |
1862 | } | |
1863 | ||
1864 | /* | |
1865 | * ocfs2_xattr_block_find() | |
1866 | * | |
1867 | * Find extended attribute in external block and | |
1868 | * fill search info into struct ocfs2_xattr_search. | |
1869 | */ | |
1870 | static int ocfs2_xattr_block_find(struct inode *inode, | |
1871 | int name_index, | |
1872 | const char *name, | |
1873 | struct ocfs2_xattr_search *xs) | |
1874 | { | |
1875 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1876 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 1877 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1878 | int ret = 0; |
1879 | ||
1880 | if (!di->i_xattr_loc) | |
1881 | return ret; | |
1882 | ||
0fcaa56a | 1883 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
1884 | if (ret < 0) { |
1885 | mlog_errno(ret); | |
1886 | return ret; | |
1887 | } | |
f6087fb7 JB |
1888 | |
1889 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1890 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
1891 | ret = -EIO; | |
1892 | goto cleanup; | |
cf1d6c76 TY |
1893 | } |
1894 | ||
1895 | xs->xattr_bh = blk_bh; | |
589dc260 TM |
1896 | |
1897 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1898 | xs->header = &xb->xb_attrs.xb_header; | |
1899 | xs->base = (void *)xs->header; | |
1900 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
1901 | xs->here = xs->header->xh_entries; | |
1902 | ||
1903 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1904 | } else | |
1905 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
1906 | name_index, | |
1907 | name, xs); | |
cf1d6c76 | 1908 | |
cf1d6c76 TY |
1909 | if (ret && ret != -ENODATA) { |
1910 | xs->xattr_bh = NULL; | |
1911 | goto cleanup; | |
1912 | } | |
1913 | xs->not_found = ret; | |
1914 | return 0; | |
cf1d6c76 TY |
1915 | cleanup: |
1916 | brelse(blk_bh); | |
1917 | ||
1918 | return ret; | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * ocfs2_xattr_block_set() | |
1923 | * | |
1924 | * Set, replace or remove an extended attribute into external block. | |
1925 | * | |
1926 | */ | |
1927 | static int ocfs2_xattr_block_set(struct inode *inode, | |
1928 | struct ocfs2_xattr_info *xi, | |
1929 | struct ocfs2_xattr_search *xs) | |
1930 | { | |
1931 | struct buffer_head *new_bh = NULL; | |
1932 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1933 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1934 | struct ocfs2_alloc_context *meta_ac = NULL; | |
1935 | handle_t *handle = NULL; | |
1936 | struct ocfs2_xattr_block *xblk = NULL; | |
1937 | u16 suballoc_bit_start; | |
1938 | u32 num_got; | |
1939 | u64 first_blkno; | |
1940 | int ret; | |
1941 | ||
1942 | if (!xs->xattr_bh) { | |
1943 | /* | |
1944 | * Alloc one external block for extended attribute | |
1945 | * outside of inode. | |
1946 | */ | |
1947 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
1948 | if (ret < 0) { | |
1949 | mlog_errno(ret); | |
1950 | goto out; | |
1951 | } | |
1952 | handle = ocfs2_start_trans(osb, | |
1953 | OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
1954 | if (IS_ERR(handle)) { | |
1955 | ret = PTR_ERR(handle); | |
1956 | mlog_errno(ret); | |
1957 | goto out; | |
1958 | } | |
1959 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1960 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1961 | if (ret < 0) { | |
1962 | mlog_errno(ret); | |
1963 | goto out_commit; | |
1964 | } | |
1965 | ||
1966 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
1967 | &suballoc_bit_start, &num_got, | |
1968 | &first_blkno); | |
1969 | if (ret < 0) { | |
1970 | mlog_errno(ret); | |
1971 | goto out_commit; | |
1972 | } | |
1973 | ||
1974 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
1975 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
1976 | ||
1977 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
1978 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1979 | if (ret < 0) { | |
1980 | mlog_errno(ret); | |
1981 | goto out_commit; | |
1982 | } | |
1983 | ||
1984 | /* Initialize ocfs2_xattr_block */ | |
1985 | xs->xattr_bh = new_bh; | |
1986 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
1987 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
1988 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
1989 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
1990 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
1991 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
1992 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
1993 | ||
1994 | xs->header = &xblk->xb_attrs.xb_header; | |
1995 | xs->base = (void *)xs->header; | |
1996 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
1997 | xs->here = xs->header->xh_entries; | |
1998 | ||
1999 | ||
2000 | ret = ocfs2_journal_dirty(handle, new_bh); | |
2001 | if (ret < 0) { | |
2002 | mlog_errno(ret); | |
2003 | goto out_commit; | |
2004 | } | |
2005 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
2006 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
2007 | if (ret < 0) | |
2008 | mlog_errno(ret); | |
2009 | out_commit: | |
2010 | ocfs2_commit_trans(osb, handle); | |
2011 | out: | |
2012 | if (meta_ac) | |
2013 | ocfs2_free_alloc_context(meta_ac); | |
2014 | if (ret < 0) | |
2015 | return ret; | |
01225596 TM |
2016 | } else |
2017 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2018 | ||
2019 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2020 | /* Set extended attribute into external block */ | |
2021 | ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL); | |
2022 | if (!ret || ret != -ENOSPC) | |
2023 | goto end; | |
2024 | ||
2025 | ret = ocfs2_xattr_create_index_block(inode, xs); | |
2026 | if (ret) | |
2027 | goto end; | |
cf1d6c76 TY |
2028 | } |
2029 | ||
01225596 | 2030 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs); |
01225596 TM |
2031 | |
2032 | end: | |
cf1d6c76 TY |
2033 | |
2034 | return ret; | |
2035 | } | |
2036 | ||
2037 | /* | |
2038 | * ocfs2_xattr_set() | |
2039 | * | |
2040 | * Set, replace or remove an extended attribute for this inode. | |
2041 | * value is NULL to remove an existing extended attribute, else either | |
2042 | * create or replace an extended attribute. | |
2043 | */ | |
2044 | int ocfs2_xattr_set(struct inode *inode, | |
2045 | int name_index, | |
2046 | const char *name, | |
2047 | const void *value, | |
2048 | size_t value_len, | |
2049 | int flags) | |
2050 | { | |
2051 | struct buffer_head *di_bh = NULL; | |
2052 | struct ocfs2_dinode *di; | |
2053 | int ret; | |
2054 | ||
2055 | struct ocfs2_xattr_info xi = { | |
2056 | .name_index = name_index, | |
2057 | .name = name, | |
2058 | .value = value, | |
2059 | .value_len = value_len, | |
2060 | }; | |
2061 | ||
2062 | struct ocfs2_xattr_search xis = { | |
2063 | .not_found = -ENODATA, | |
2064 | }; | |
2065 | ||
2066 | struct ocfs2_xattr_search xbs = { | |
2067 | .not_found = -ENODATA, | |
2068 | }; | |
2069 | ||
8154da3d TY |
2070 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2071 | return -EOPNOTSUPP; | |
2072 | ||
ba937127 JB |
2073 | /* |
2074 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2075 | * bucket. | |
2076 | */ | |
2077 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2078 | if (!xbs.bucket) { | |
2079 | mlog_errno(-ENOMEM); | |
2080 | return -ENOMEM; | |
2081 | } | |
2082 | ||
cf1d6c76 TY |
2083 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2084 | if (ret < 0) { | |
2085 | mlog_errno(ret); | |
ba937127 | 2086 | goto cleanup_nolock; |
cf1d6c76 TY |
2087 | } |
2088 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2089 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2090 | ||
2091 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2092 | /* | |
2093 | * Scan inode and external block to find the same name | |
2094 | * extended attribute and collect search infomation. | |
2095 | */ | |
2096 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2097 | if (ret) | |
2098 | goto cleanup; | |
2099 | if (xis.not_found) { | |
2100 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2101 | if (ret) | |
2102 | goto cleanup; | |
2103 | } | |
2104 | ||
2105 | if (xis.not_found && xbs.not_found) { | |
2106 | ret = -ENODATA; | |
2107 | if (flags & XATTR_REPLACE) | |
2108 | goto cleanup; | |
2109 | ret = 0; | |
2110 | if (!value) | |
2111 | goto cleanup; | |
2112 | } else { | |
2113 | ret = -EEXIST; | |
2114 | if (flags & XATTR_CREATE) | |
2115 | goto cleanup; | |
2116 | } | |
2117 | ||
2118 | if (!value) { | |
2119 | /* Remove existing extended attribute */ | |
2120 | if (!xis.not_found) | |
2121 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2122 | else if (!xbs.not_found) | |
2123 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2124 | } else { | |
2125 | /* We always try to set extended attribute into inode first*/ | |
2126 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2127 | if (!ret && !xbs.not_found) { | |
2128 | /* | |
2129 | * If succeed and that extended attribute existing in | |
2130 | * external block, then we will remove it. | |
2131 | */ | |
2132 | xi.value = NULL; | |
2133 | xi.value_len = 0; | |
2134 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2135 | } else if (ret == -ENOSPC) { | |
2136 | if (di->i_xattr_loc && !xbs.xattr_bh) { | |
2137 | ret = ocfs2_xattr_block_find(inode, name_index, | |
2138 | name, &xbs); | |
2139 | if (ret) | |
2140 | goto cleanup; | |
2141 | } | |
2142 | /* | |
2143 | * If no space in inode, we will set extended attribute | |
2144 | * into external block. | |
2145 | */ | |
2146 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2147 | if (ret) | |
2148 | goto cleanup; | |
2149 | if (!xis.not_found) { | |
2150 | /* | |
2151 | * If succeed and that extended attribute | |
2152 | * existing in inode, we will remove it. | |
2153 | */ | |
2154 | xi.value = NULL; | |
2155 | xi.value_len = 0; | |
2156 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2157 | } | |
2158 | } | |
2159 | } | |
2160 | cleanup: | |
2161 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2162 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2163 | cleanup_nolock: |
cf1d6c76 TY |
2164 | brelse(di_bh); |
2165 | brelse(xbs.xattr_bh); | |
ba937127 | 2166 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2167 | |
2168 | return ret; | |
2169 | } | |
2170 | ||
0c044f0b TM |
2171 | /* |
2172 | * Find the xattr extent rec which may contains name_hash. | |
2173 | * e_cpos will be the first name hash of the xattr rec. | |
2174 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2175 | */ | |
2176 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2177 | u32 name_hash, | |
2178 | u64 *p_blkno, | |
2179 | u32 *e_cpos, | |
2180 | u32 *num_clusters, | |
2181 | struct ocfs2_extent_list *el) | |
2182 | { | |
2183 | int ret = 0, i; | |
2184 | struct buffer_head *eb_bh = NULL; | |
2185 | struct ocfs2_extent_block *eb; | |
2186 | struct ocfs2_extent_rec *rec = NULL; | |
2187 | u64 e_blkno = 0; | |
2188 | ||
2189 | if (el->l_tree_depth) { | |
2190 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2191 | if (ret) { | |
2192 | mlog_errno(ret); | |
2193 | goto out; | |
2194 | } | |
2195 | ||
2196 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2197 | el = &eb->h_list; | |
2198 | ||
2199 | if (el->l_tree_depth) { | |
2200 | ocfs2_error(inode->i_sb, | |
2201 | "Inode %lu has non zero tree depth in " | |
2202 | "xattr tree block %llu\n", inode->i_ino, | |
2203 | (unsigned long long)eb_bh->b_blocknr); | |
2204 | ret = -EROFS; | |
2205 | goto out; | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2210 | rec = &el->l_recs[i]; | |
2211 | ||
2212 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2213 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2214 | break; | |
2215 | } | |
2216 | } | |
2217 | ||
2218 | if (!e_blkno) { | |
2219 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2220 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2221 | le32_to_cpu(rec->e_cpos), | |
2222 | ocfs2_rec_clusters(el, rec)); | |
2223 | ret = -EROFS; | |
2224 | goto out; | |
2225 | } | |
2226 | ||
2227 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2228 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2229 | if (e_cpos) | |
2230 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2231 | out: | |
2232 | brelse(eb_bh); | |
2233 | return ret; | |
2234 | } | |
2235 | ||
2236 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2237 | struct ocfs2_xattr_bucket *bucket, | |
2238 | void *para); | |
2239 | ||
589dc260 | 2240 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2241 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2242 | int name_index, |
2243 | const char *name, | |
2244 | u32 name_hash, | |
2245 | u16 *xe_index, | |
2246 | int *found) | |
2247 | { | |
2248 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2249 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2250 | size_t name_len = strlen(name); |
2251 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2252 | char *xe_name; |
2253 | ||
2254 | /* | |
2255 | * We don't use binary search in the bucket because there | |
2256 | * may be multiple entries with the same name hash. | |
2257 | */ | |
2258 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2259 | xe = &xh->xh_entries[i]; | |
2260 | ||
2261 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2262 | continue; | |
2263 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2264 | break; | |
2265 | ||
2266 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2267 | if (!cmp) | |
2268 | cmp = name_len - xe->xe_name_len; | |
2269 | if (cmp) | |
2270 | continue; | |
2271 | ||
2272 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2273 | xh, | |
2274 | i, | |
2275 | &block_off, | |
2276 | &new_offset); | |
2277 | if (ret) { | |
2278 | mlog_errno(ret); | |
2279 | break; | |
2280 | } | |
2281 | ||
e2356a3f JB |
2282 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2283 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2284 | *xe_index = i; |
2285 | *found = 1; | |
2286 | ret = 0; | |
2287 | break; | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | return ret; | |
2292 | } | |
2293 | ||
2294 | /* | |
2295 | * Find the specified xattr entry in a series of buckets. | |
2296 | * This series start from p_blkno and last for num_clusters. | |
2297 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2298 | * the num of the valid buckets. | |
2299 | * | |
2300 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2301 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2302 | */ | |
2303 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2304 | int name_index, | |
2305 | const char *name, | |
2306 | u32 name_hash, | |
2307 | u64 p_blkno, | |
2308 | u32 first_hash, | |
2309 | u32 num_clusters, | |
2310 | struct ocfs2_xattr_search *xs) | |
2311 | { | |
2312 | int ret, found = 0; | |
589dc260 TM |
2313 | struct ocfs2_xattr_header *xh = NULL; |
2314 | struct ocfs2_xattr_entry *xe = NULL; | |
2315 | u16 index = 0; | |
2316 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2317 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2318 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2319 | u32 last_hash; |
e2356a3f | 2320 | u64 blkno, lower_blkno = 0; |
589dc260 | 2321 | |
e2356a3f JB |
2322 | search = ocfs2_xattr_bucket_new(inode); |
2323 | if (!search) { | |
2324 | ret = -ENOMEM; | |
2325 | mlog_errno(ret); | |
2326 | goto out; | |
2327 | } | |
2328 | ||
2329 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2330 | if (ret) { |
2331 | mlog_errno(ret); | |
2332 | goto out; | |
2333 | } | |
2334 | ||
e2356a3f | 2335 | xh = bucket_xh(search); |
589dc260 | 2336 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 2337 | while (low_bucket <= high_bucket) { |
e2356a3f | 2338 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 2339 | |
e2356a3f | 2340 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 2341 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 2342 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
2343 | if (ret) { |
2344 | mlog_errno(ret); | |
2345 | goto out; | |
2346 | } | |
2347 | ||
e2356a3f | 2348 | xh = bucket_xh(search); |
589dc260 TM |
2349 | xe = &xh->xh_entries[0]; |
2350 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
2351 | high_bucket = bucket - 1; | |
2352 | continue; | |
2353 | } | |
2354 | ||
2355 | /* | |
2356 | * Check whether the hash of the last entry in our | |
5a095611 TM |
2357 | * bucket is larger than the search one. for an empty |
2358 | * bucket, the last one is also the first one. | |
589dc260 | 2359 | */ |
5a095611 TM |
2360 | if (xh->xh_count) |
2361 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
2362 | ||
589dc260 TM |
2363 | last_hash = le32_to_cpu(xe->xe_name_hash); |
2364 | ||
e2356a3f JB |
2365 | /* record lower_blkno which may be the insert place. */ |
2366 | lower_blkno = blkno; | |
589dc260 TM |
2367 | |
2368 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
2369 | low_bucket = bucket + 1; | |
2370 | continue; | |
2371 | } | |
2372 | ||
2373 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 2374 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
2375 | name_index, name, name_hash, |
2376 | &index, &found); | |
2377 | if (ret) { | |
2378 | mlog_errno(ret); | |
2379 | goto out; | |
2380 | } | |
2381 | break; | |
2382 | } | |
2383 | ||
2384 | /* | |
2385 | * Record the bucket we have found. | |
2386 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
2387 | * always set it to the previous bucket. | |
2388 | */ | |
e2356a3f JB |
2389 | if (!lower_blkno) |
2390 | lower_blkno = p_blkno; | |
2391 | ||
2392 | /* This should be in cache - we just read it during the search */ | |
2393 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
2394 | if (ret) { | |
2395 | mlog_errno(ret); | |
2396 | goto out; | |
589dc260 | 2397 | } |
589dc260 | 2398 | |
ba937127 JB |
2399 | xs->header = bucket_xh(xs->bucket); |
2400 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
2401 | xs->end = xs->base + inode->i_sb->s_blocksize; |
2402 | ||
2403 | if (found) { | |
589dc260 TM |
2404 | xs->here = &xs->header->xh_entries[index]; |
2405 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 2406 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
2407 | } else |
2408 | ret = -ENODATA; | |
2409 | ||
2410 | out: | |
e2356a3f | 2411 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
2412 | return ret; |
2413 | } | |
2414 | ||
2415 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
2416 | struct buffer_head *root_bh, | |
2417 | int name_index, | |
2418 | const char *name, | |
2419 | struct ocfs2_xattr_search *xs) | |
2420 | { | |
2421 | int ret; | |
2422 | struct ocfs2_xattr_block *xb = | |
2423 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
2424 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
2425 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
2426 | u64 p_blkno = 0; | |
2427 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 2428 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
2429 | |
2430 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2431 | return -ENODATA; | |
2432 | ||
2433 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
2434 | name, name_hash, name_index); | |
2435 | ||
2436 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
2437 | &num_clusters, el); | |
2438 | if (ret) { | |
2439 | mlog_errno(ret); | |
2440 | goto out; | |
2441 | } | |
2442 | ||
2443 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
2444 | ||
2445 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
2446 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
2447 | first_hash); | |
589dc260 TM |
2448 | |
2449 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
2450 | p_blkno, first_hash, num_clusters, xs); | |
2451 | ||
2452 | out: | |
2453 | return ret; | |
2454 | } | |
2455 | ||
0c044f0b TM |
2456 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
2457 | u64 blkno, | |
2458 | u32 clusters, | |
2459 | xattr_bucket_func *func, | |
2460 | void *para) | |
2461 | { | |
6dde41d9 | 2462 | int i, ret = 0; |
0c044f0b TM |
2463 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
2464 | u32 num_buckets = clusters * bpc; | |
ba937127 | 2465 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 2466 | |
ba937127 JB |
2467 | bucket = ocfs2_xattr_bucket_new(inode); |
2468 | if (!bucket) { | |
2469 | mlog_errno(-ENOMEM); | |
2470 | return -ENOMEM; | |
2471 | } | |
0c044f0b TM |
2472 | |
2473 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 2474 | clusters, (unsigned long long)blkno); |
0c044f0b | 2475 | |
ba937127 JB |
2476 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
2477 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
2478 | if (ret) { |
2479 | mlog_errno(ret); | |
ba937127 | 2480 | break; |
0c044f0b TM |
2481 | } |
2482 | ||
0c044f0b TM |
2483 | /* |
2484 | * The real bucket num in this series of blocks is stored | |
2485 | * in the 1st bucket. | |
2486 | */ | |
2487 | if (i == 0) | |
ba937127 | 2488 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 2489 | |
de29c085 MF |
2490 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
2491 | (unsigned long long)blkno, | |
ba937127 | 2492 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 2493 | if (func) { |
ba937127 JB |
2494 | ret = func(inode, bucket, para); |
2495 | if (ret) | |
0c044f0b | 2496 | mlog_errno(ret); |
ba937127 | 2497 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
2498 | } |
2499 | ||
ba937127 JB |
2500 | ocfs2_xattr_bucket_relse(bucket); |
2501 | if (ret) | |
2502 | break; | |
0c044f0b TM |
2503 | } |
2504 | ||
ba937127 | 2505 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
2506 | return ret; |
2507 | } | |
2508 | ||
2509 | struct ocfs2_xattr_tree_list { | |
2510 | char *buffer; | |
2511 | size_t buffer_size; | |
936b8834 | 2512 | size_t result; |
0c044f0b TM |
2513 | }; |
2514 | ||
2515 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
2516 | struct ocfs2_xattr_header *xh, | |
2517 | int index, | |
2518 | int *block_off, | |
2519 | int *new_offset) | |
2520 | { | |
2521 | u16 name_offset; | |
2522 | ||
2523 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
2524 | return -EINVAL; | |
2525 | ||
2526 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
2527 | ||
2528 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
2529 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
2530 | ||
2531 | return 0; | |
2532 | } | |
2533 | ||
2534 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
2535 | struct ocfs2_xattr_bucket *bucket, | |
2536 | void *para) | |
2537 | { | |
936b8834 | 2538 | int ret = 0, type; |
0c044f0b | 2539 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 2540 | int i, block_off, new_offset; |
936b8834 | 2541 | const char *prefix, *name; |
0c044f0b | 2542 | |
3e632946 JB |
2543 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
2544 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
2545 | type = ocfs2_xattr_get_type(entry); |
2546 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 2547 | |
936b8834 | 2548 | if (prefix) { |
0c044f0b | 2549 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 2550 | bucket_xh(bucket), |
0c044f0b TM |
2551 | i, |
2552 | &block_off, | |
2553 | &new_offset); | |
2554 | if (ret) | |
2555 | break; | |
936b8834 | 2556 | |
51def39f | 2557 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
2558 | new_offset; |
2559 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
2560 | xl->buffer_size, | |
2561 | &xl->result, | |
2562 | prefix, name, | |
2563 | entry->xe_name_len); | |
2564 | if (ret) | |
2565 | break; | |
0c044f0b TM |
2566 | } |
2567 | } | |
2568 | ||
2569 | return ret; | |
2570 | } | |
2571 | ||
2572 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
2573 | struct ocfs2_xattr_tree_root *xt, | |
2574 | char *buffer, | |
2575 | size_t buffer_size) | |
2576 | { | |
2577 | struct ocfs2_extent_list *el = &xt->xt_list; | |
2578 | int ret = 0; | |
2579 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
2580 | u64 p_blkno = 0; | |
2581 | struct ocfs2_xattr_tree_list xl = { | |
2582 | .buffer = buffer, | |
2583 | .buffer_size = buffer_size, | |
936b8834 | 2584 | .result = 0, |
0c044f0b TM |
2585 | }; |
2586 | ||
2587 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2588 | return 0; | |
2589 | ||
2590 | while (name_hash > 0) { | |
2591 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
2592 | &e_cpos, &num_clusters, el); | |
2593 | if (ret) { | |
2594 | mlog_errno(ret); | |
2595 | goto out; | |
2596 | } | |
2597 | ||
2598 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
2599 | ocfs2_list_xattr_bucket, | |
2600 | &xl); | |
2601 | if (ret) { | |
2602 | mlog_errno(ret); | |
2603 | goto out; | |
2604 | } | |
2605 | ||
2606 | if (e_cpos == 0) | |
2607 | break; | |
2608 | ||
2609 | name_hash = e_cpos - 1; | |
2610 | } | |
2611 | ||
936b8834 | 2612 | ret = xl.result; |
0c044f0b TM |
2613 | out: |
2614 | return ret; | |
2615 | } | |
01225596 TM |
2616 | |
2617 | static int cmp_xe(const void *a, const void *b) | |
2618 | { | |
2619 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2620 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
2621 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
2622 | ||
2623 | if (l_hash > r_hash) | |
2624 | return 1; | |
2625 | if (l_hash < r_hash) | |
2626 | return -1; | |
2627 | return 0; | |
2628 | } | |
2629 | ||
2630 | static void swap_xe(void *a, void *b, int size) | |
2631 | { | |
2632 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
2633 | ||
2634 | tmp = *l; | |
2635 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
2636 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
2637 | } | |
2638 | ||
2639 | /* | |
2640 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
2641 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
2642 | * The header goes at the start of the bucket, and the names+values are |
2643 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
2644 | * Note: we need to sort the entries since they are not saved in order |
2645 | * in the ocfs2_xattr_block. | |
2646 | */ | |
2647 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
2648 | struct buffer_head *xb_bh, | |
178eeac3 | 2649 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
2650 | { |
2651 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 2652 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
2653 | u16 offset, size, off_change; |
2654 | struct ocfs2_xattr_entry *xe; | |
2655 | struct ocfs2_xattr_block *xb = | |
2656 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2657 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 2658 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 2659 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
2660 | char *src = xb_bh->b_data; |
2661 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
2662 | |
2663 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
2664 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
2665 | (unsigned long long)bucket_blkno(bucket)); |
2666 | ||
2667 | for (i = 0; i < blks; i++) | |
2668 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 2669 | |
01225596 TM |
2670 | /* |
2671 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
2672 | * there is a offset change corresponding to the change of | |
2673 | * ocfs2_xattr_header's position. | |
2674 | */ | |
2675 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2676 | xe = &xb_xh->xh_entries[count - 1]; | |
2677 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
2678 | size = blocksize - offset; | |
2679 | ||
2680 | /* copy all the names and values. */ | |
01225596 TM |
2681 | memcpy(target + offset, src + offset, size); |
2682 | ||
2683 | /* Init new header now. */ | |
2684 | xh->xh_count = xb_xh->xh_count; | |
2685 | xh->xh_num_buckets = cpu_to_le16(1); | |
2686 | xh->xh_name_value_len = cpu_to_le16(size); | |
2687 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
2688 | ||
2689 | /* copy all the entries. */ | |
178eeac3 | 2690 | target = bucket_block(bucket, 0); |
01225596 TM |
2691 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
2692 | size = count * sizeof(struct ocfs2_xattr_entry); | |
2693 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
2694 | ||
2695 | /* Change the xe offset for all the xe because of the move. */ | |
2696 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
2697 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2698 | for (i = 0; i < count; i++) | |
2699 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
2700 | ||
2701 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
2702 | offset, size, off_change); | |
2703 | ||
2704 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
2705 | cmp_xe, swap_xe); | |
2706 | } | |
2707 | ||
2708 | /* | |
2709 | * After we move xattr from block to index btree, we have to | |
2710 | * update ocfs2_xattr_search to the new xe and base. | |
2711 | * | |
2712 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
2713 | * While if the entry is in index b-tree, "bucket" indicates the | |
2714 | * real place of the xattr. | |
2715 | */ | |
178eeac3 JB |
2716 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
2717 | struct ocfs2_xattr_search *xs, | |
2718 | struct buffer_head *old_bh) | |
01225596 | 2719 | { |
01225596 TM |
2720 | char *buf = old_bh->b_data; |
2721 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
2722 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 2723 | int i; |
01225596 | 2724 | |
ba937127 | 2725 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 2726 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
2727 | xs->end = xs->base + inode->i_sb->s_blocksize; |
2728 | ||
178eeac3 JB |
2729 | if (xs->not_found) |
2730 | return; | |
01225596 | 2731 | |
178eeac3 JB |
2732 | i = xs->here - old_xh->xh_entries; |
2733 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
2734 | } |
2735 | ||
2736 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
2737 | struct ocfs2_xattr_search *xs) | |
2738 | { | |
2739 | int ret, credits = OCFS2_SUBALLOC_ALLOC; | |
2740 | u32 bit_off, len; | |
2741 | u64 blkno; | |
2742 | handle_t *handle; | |
2743 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2744 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2745 | struct ocfs2_alloc_context *data_ac; | |
01225596 TM |
2746 | struct buffer_head *xb_bh = xs->xattr_bh; |
2747 | struct ocfs2_xattr_block *xb = | |
2748 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2749 | struct ocfs2_xattr_tree_root *xr; | |
2750 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
2751 | |
2752 | mlog(0, "create xattr index block for %llu\n", | |
2753 | (unsigned long long)xb_bh->b_blocknr); | |
2754 | ||
2755 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 2756 | BUG_ON(!xs->bucket); |
01225596 TM |
2757 | |
2758 | ret = ocfs2_reserve_clusters(osb, 1, &data_ac); | |
2759 | if (ret) { | |
2760 | mlog_errno(ret); | |
2761 | goto out; | |
2762 | } | |
2763 | ||
2764 | /* | |
2765 | * XXX: | |
2766 | * We can use this lock for now, and maybe move to a dedicated mutex | |
2767 | * if performance becomes a problem later. | |
2768 | */ | |
2769 | down_write(&oi->ip_alloc_sem); | |
2770 | ||
2771 | /* | |
178eeac3 JB |
2772 | * We need more credits. One for the xattr block update and one |
2773 | * for each block of the new xattr bucket. | |
01225596 | 2774 | */ |
178eeac3 | 2775 | credits += 1 + ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
2776 | handle = ocfs2_start_trans(osb, credits); |
2777 | if (IS_ERR(handle)) { | |
2778 | ret = PTR_ERR(handle); | |
2779 | mlog_errno(ret); | |
2780 | goto out_sem; | |
2781 | } | |
2782 | ||
2783 | ret = ocfs2_journal_access(handle, inode, xb_bh, | |
2784 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2785 | if (ret) { | |
2786 | mlog_errno(ret); | |
2787 | goto out_commit; | |
2788 | } | |
2789 | ||
2790 | ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len); | |
2791 | if (ret) { | |
2792 | mlog_errno(ret); | |
2793 | goto out_commit; | |
2794 | } | |
2795 | ||
2796 | /* | |
2797 | * The bucket may spread in many blocks, and | |
2798 | * we will only touch the 1st block and the last block | |
2799 | * in the whole bucket(one for entry and one for data). | |
2800 | */ | |
2801 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
2802 | ||
de29c085 MF |
2803 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
2804 | (unsigned long long)blkno); | |
01225596 | 2805 | |
178eeac3 JB |
2806 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
2807 | if (ret) { | |
01225596 TM |
2808 | mlog_errno(ret); |
2809 | goto out_commit; | |
2810 | } | |
2811 | ||
178eeac3 JB |
2812 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
2813 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
2814 | if (ret) { |
2815 | mlog_errno(ret); | |
2816 | goto out_commit; | |
2817 | } | |
2818 | ||
178eeac3 JB |
2819 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
2820 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 2821 | |
178eeac3 | 2822 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
2823 | |
2824 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
2825 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
2826 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
2827 | ||
2828 | xr = &xb->xb_attrs.xb_root; | |
2829 | xr->xt_clusters = cpu_to_le32(1); | |
2830 | xr->xt_last_eb_blk = 0; | |
2831 | xr->xt_list.l_tree_depth = 0; | |
2832 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2833 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2834 | ||
2835 | xr->xt_list.l_recs[0].e_cpos = 0; | |
2836 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
2837 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
2838 | ||
2839 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
2840 | ||
2841 | ret = ocfs2_journal_dirty(handle, xb_bh); | |
2842 | if (ret) { | |
2843 | mlog_errno(ret); | |
2844 | goto out_commit; | |
2845 | } | |
2846 | ||
2847 | out_commit: | |
2848 | ocfs2_commit_trans(osb, handle); | |
2849 | ||
2850 | out_sem: | |
2851 | up_write(&oi->ip_alloc_sem); | |
2852 | ||
2853 | out: | |
2854 | if (data_ac) | |
2855 | ocfs2_free_alloc_context(data_ac); | |
2856 | ||
01225596 TM |
2857 | return ret; |
2858 | } | |
2859 | ||
2860 | static int cmp_xe_offset(const void *a, const void *b) | |
2861 | { | |
2862 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2863 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
2864 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
2865 | ||
2866 | if (l_name_offset < r_name_offset) | |
2867 | return 1; | |
2868 | if (l_name_offset > r_name_offset) | |
2869 | return -1; | |
2870 | return 0; | |
2871 | } | |
2872 | ||
2873 | /* | |
2874 | * defrag a xattr bucket if we find that the bucket has some | |
2875 | * holes beteen name/value pairs. | |
2876 | * We will move all the name/value pairs to the end of the bucket | |
2877 | * so that we can spare some space for insertion. | |
2878 | */ | |
2879 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
2880 | struct ocfs2_xattr_bucket *bucket) | |
2881 | { | |
2882 | int ret, i; | |
2883 | size_t end, offset, len, value_len; | |
2884 | struct ocfs2_xattr_header *xh; | |
2885 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 2886 | u64 blkno = bucket_blkno(bucket); |
01225596 | 2887 | u16 xh_free_start; |
01225596 TM |
2888 | size_t blocksize = inode->i_sb->s_blocksize; |
2889 | handle_t *handle; | |
01225596 | 2890 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
2891 | |
2892 | /* | |
2893 | * In order to make the operation more efficient and generic, | |
2894 | * we copy all the blocks into a contiguous memory and do the | |
2895 | * defragment there, so if anything is error, we will not touch | |
2896 | * the real block. | |
2897 | */ | |
2898 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
2899 | if (!bucket_buf) { | |
2900 | ret = -EIO; | |
2901 | goto out; | |
2902 | } | |
2903 | ||
2904 | buf = bucket_buf; | |
1c32a2fd TM |
2905 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
2906 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 2907 | |
1c32a2fd | 2908 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), bucket->bu_blocks); |
01225596 TM |
2909 | if (IS_ERR(handle)) { |
2910 | ret = PTR_ERR(handle); | |
2911 | handle = NULL; | |
2912 | mlog_errno(ret); | |
2913 | goto out; | |
2914 | } | |
2915 | ||
1c32a2fd | 2916 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
2917 | OCFS2_JOURNAL_ACCESS_WRITE); |
2918 | if (ret < 0) { | |
2919 | mlog_errno(ret); | |
2920 | goto commit; | |
01225596 TM |
2921 | } |
2922 | ||
2923 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
2924 | entries = (char *)xh->xh_entries; | |
2925 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
2926 | ||
2927 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
2928 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
2929 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
2930 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
2931 | |
2932 | /* | |
2933 | * sort all the entries by their offset. | |
2934 | * the largest will be the first, so that we can | |
2935 | * move them to the end one by one. | |
2936 | */ | |
2937 | sort(entries, le16_to_cpu(xh->xh_count), | |
2938 | sizeof(struct ocfs2_xattr_entry), | |
2939 | cmp_xe_offset, swap_xe); | |
2940 | ||
2941 | /* Move all name/values to the end of the bucket. */ | |
2942 | xe = xh->xh_entries; | |
2943 | end = OCFS2_XATTR_BUCKET_SIZE; | |
2944 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
2945 | offset = le16_to_cpu(xe->xe_name_offset); | |
2946 | if (ocfs2_xattr_is_local(xe)) | |
2947 | value_len = OCFS2_XATTR_SIZE( | |
2948 | le64_to_cpu(xe->xe_value_size)); | |
2949 | else | |
2950 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
2951 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
2952 | ||
2953 | /* | |
2954 | * We must make sure that the name/value pair | |
2955 | * exist in the same block. So adjust end to | |
2956 | * the previous block end if needed. | |
2957 | */ | |
2958 | if (((end - len) / blocksize != | |
2959 | (end - 1) / blocksize)) | |
2960 | end = end - end % blocksize; | |
2961 | ||
2962 | if (end > offset + len) { | |
2963 | memmove(bucket_buf + end - len, | |
2964 | bucket_buf + offset, len); | |
2965 | xe->xe_name_offset = cpu_to_le16(end - len); | |
2966 | } | |
2967 | ||
2968 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
2969 | "bucket %llu\n", (unsigned long long)blkno); | |
2970 | ||
2971 | end -= len; | |
2972 | } | |
2973 | ||
2974 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
2975 | "bucket %llu\n", (unsigned long long)blkno); | |
2976 | ||
2977 | if (xh_free_start == end) | |
2978 | goto commit; | |
2979 | ||
2980 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
2981 | xh->xh_free_start = cpu_to_le16(end); | |
2982 | ||
2983 | /* sort the entries by their name_hash. */ | |
2984 | sort(entries, le16_to_cpu(xh->xh_count), | |
2985 | sizeof(struct ocfs2_xattr_entry), | |
2986 | cmp_xe, swap_xe); | |
2987 | ||
2988 | buf = bucket_buf; | |
1c32a2fd TM |
2989 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
2990 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
2991 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 TM |
2992 | |
2993 | commit: | |
2994 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2995 | out: | |
01225596 TM |
2996 | kfree(bucket_buf); |
2997 | return ret; | |
2998 | } | |
2999 | ||
3000 | /* | |
3001 | * Move half nums of the xattr bucket in the previous cluster to this new | |
3002 | * cluster. We only touch the last cluster of the previous extend record. | |
3003 | * | |
3004 | * first_bh is the first buffer_head of a series of bucket in the same | |
3005 | * extent rec and header_bh is the header of one bucket in this cluster. | |
3006 | * They will be updated if we move the data header_bh contains to the new | |
3007 | * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. | |
3008 | */ | |
3009 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3010 | handle_t *handle, | |
3011 | struct buffer_head **first_bh, | |
3012 | struct buffer_head **header_bh, | |
3013 | u64 new_blkno, | |
3014 | u64 prev_blkno, | |
3015 | u32 num_clusters, | |
3016 | u32 *first_hash) | |
3017 | { | |
3018 | int i, ret, credits; | |
3019 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3020 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3021 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3022 | int blocksize = inode->i_sb->s_blocksize; | |
3023 | struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; | |
3024 | struct ocfs2_xattr_header *new_xh; | |
3025 | struct ocfs2_xattr_header *xh = | |
3026 | (struct ocfs2_xattr_header *)((*first_bh)->b_data); | |
3027 | ||
3028 | BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); | |
3029 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); | |
3030 | ||
3031 | prev_bh = *first_bh; | |
3032 | get_bh(prev_bh); | |
3033 | xh = (struct ocfs2_xattr_header *)prev_bh->b_data; | |
3034 | ||
3035 | prev_blkno += (num_clusters - 1) * bpc + bpc / 2; | |
3036 | ||
3037 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", | |
de29c085 | 3038 | (unsigned long long)prev_blkno, (unsigned long long)new_blkno); |
01225596 TM |
3039 | |
3040 | /* | |
3041 | * We need to update the 1st half of the new cluster and | |
3042 | * 1 more for the update of the 1st bucket of the previous | |
3043 | * extent record. | |
3044 | */ | |
3045 | credits = bpc / 2 + 1; | |
3046 | ret = ocfs2_extend_trans(handle, credits); | |
3047 | if (ret) { | |
3048 | mlog_errno(ret); | |
3049 | goto out; | |
3050 | } | |
3051 | ||
3052 | ret = ocfs2_journal_access(handle, inode, prev_bh, | |
3053 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3054 | if (ret) { | |
3055 | mlog_errno(ret); | |
3056 | goto out; | |
3057 | } | |
3058 | ||
3059 | for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { | |
3060 | old_bh = new_bh = NULL; | |
3061 | new_bh = sb_getblk(inode->i_sb, new_blkno); | |
3062 | if (!new_bh) { | |
3063 | ret = -EIO; | |
3064 | mlog_errno(ret); | |
3065 | goto out; | |
3066 | } | |
3067 | ||
3068 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
3069 | ||
3070 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
3071 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3072 | if (ret < 0) { | |
3073 | mlog_errno(ret); | |
3074 | brelse(new_bh); | |
3075 | goto out; | |
3076 | } | |
3077 | ||
0fcaa56a | 3078 | ret = ocfs2_read_block(inode, prev_blkno, &old_bh); |
01225596 TM |
3079 | if (ret < 0) { |
3080 | mlog_errno(ret); | |
3081 | brelse(new_bh); | |
3082 | goto out; | |
3083 | } | |
3084 | ||
3085 | memcpy(new_bh->b_data, old_bh->b_data, blocksize); | |
3086 | ||
3087 | if (i == 0) { | |
3088 | new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; | |
3089 | new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); | |
3090 | ||
3091 | if (first_hash) | |
3092 | *first_hash = le32_to_cpu( | |
3093 | new_xh->xh_entries[0].xe_name_hash); | |
3094 | new_first_bh = new_bh; | |
3095 | get_bh(new_first_bh); | |
3096 | } | |
3097 | ||
3098 | ocfs2_journal_dirty(handle, new_bh); | |
3099 | ||
3100 | if (*header_bh == old_bh) { | |
3101 | brelse(*header_bh); | |
3102 | *header_bh = new_bh; | |
3103 | get_bh(*header_bh); | |
3104 | ||
3105 | brelse(*first_bh); | |
3106 | *first_bh = new_first_bh; | |
3107 | get_bh(*first_bh); | |
3108 | } | |
3109 | brelse(new_bh); | |
3110 | brelse(old_bh); | |
3111 | } | |
3112 | ||
3113 | le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); | |
3114 | ||
3115 | ocfs2_journal_dirty(handle, prev_bh); | |
3116 | out: | |
3117 | brelse(prev_bh); | |
3118 | brelse(new_first_bh); | |
3119 | return ret; | |
3120 | } | |
3121 | ||
01225596 | 3122 | /* |
80bcaf34 TM |
3123 | * Find the suitable pos when we divide a bucket into 2. |
3124 | * We have to make sure the xattrs with the same hash value exist | |
3125 | * in the same bucket. | |
3126 | * | |
3127 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3128 | * place where the hash value changes. Try to find the most even split. | |
3129 | * The most common case is that all entries have different hash values, | |
3130 | * and the first check we make will find a place to split. | |
3131 | */ | |
3132 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3133 | { | |
3134 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3135 | int count = le16_to_cpu(xh->xh_count); | |
3136 | int delta, middle = count / 2; | |
3137 | ||
3138 | /* | |
3139 | * We start at the middle. Each step gets farther away in both | |
3140 | * directions. We therefore hit the change in hash value | |
3141 | * nearest to the middle. Note that this loop does not execute for | |
3142 | * count < 2. | |
3143 | */ | |
3144 | for (delta = 0; delta < middle; delta++) { | |
3145 | /* Let's check delta earlier than middle */ | |
3146 | if (cmp_xe(&entries[middle - delta - 1], | |
3147 | &entries[middle - delta])) | |
3148 | return middle - delta; | |
3149 | ||
3150 | /* For even counts, don't walk off the end */ | |
3151 | if ((middle + delta + 1) == count) | |
3152 | continue; | |
3153 | ||
3154 | /* Now try delta past middle */ | |
3155 | if (cmp_xe(&entries[middle + delta], | |
3156 | &entries[middle + delta + 1])) | |
3157 | return middle + delta + 1; | |
3158 | } | |
3159 | ||
3160 | /* Every entry had the same hash */ | |
3161 | return count; | |
3162 | } | |
3163 | ||
3164 | /* | |
3165 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3166 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3167 | * |
3168 | * Normally half of the xattrs will be moved. But we have to make | |
3169 | * sure that the xattrs with the same hash value are stored in the | |
3170 | * same bucket. If all the xattrs in this bucket have the same hash | |
3171 | * value, the new bucket will be initialized as an empty one and the | |
3172 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3173 | */ |
80bcaf34 TM |
3174 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3175 | handle_t *handle, | |
3176 | u64 blk, | |
3177 | u64 new_blk, | |
3178 | u32 *first_hash, | |
3179 | int new_bucket_head) | |
01225596 TM |
3180 | { |
3181 | int ret, i; | |
80bcaf34 | 3182 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3183 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3184 | struct ocfs2_xattr_header *xh; |
3185 | struct ocfs2_xattr_entry *xe; | |
3186 | int blocksize = inode->i_sb->s_blocksize; | |
3187 | ||
80bcaf34 | 3188 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3189 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3190 | |
ba937127 JB |
3191 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3192 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3193 | if (!s_bucket || !t_bucket) { | |
3194 | ret = -ENOMEM; | |
3195 | mlog_errno(ret); | |
3196 | goto out; | |
3197 | } | |
01225596 | 3198 | |
ba937127 | 3199 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3200 | if (ret) { |
3201 | mlog_errno(ret); | |
3202 | goto out; | |
3203 | } | |
3204 | ||
ba937127 | 3205 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3206 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3207 | if (ret) { |
3208 | mlog_errno(ret); | |
3209 | goto out; | |
3210 | } | |
3211 | ||
784b816a JB |
3212 | /* |
3213 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3214 | * there's no need to read it. | |
3215 | */ | |
ba937127 | 3216 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3217 | if (ret) { |
3218 | mlog_errno(ret); | |
3219 | goto out; | |
3220 | } | |
3221 | ||
ba937127 | 3222 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3223 | new_bucket_head ? |
3224 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3225 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3226 | if (ret) { | |
3227 | mlog_errno(ret); | |
3228 | goto out; | |
01225596 TM |
3229 | } |
3230 | ||
ba937127 | 3231 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3232 | count = le16_to_cpu(xh->xh_count); |
3233 | start = ocfs2_xattr_find_divide_pos(xh); | |
3234 | ||
3235 | if (start == count) { | |
3236 | xe = &xh->xh_entries[start-1]; | |
3237 | ||
3238 | /* | |
3239 | * initialized a new empty bucket here. | |
3240 | * The hash value is set as one larger than | |
3241 | * that of the last entry in the previous bucket. | |
3242 | */ | |
ba937127 JB |
3243 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3244 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3245 | |
ba937127 | 3246 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3247 | xh->xh_free_start = cpu_to_le16(blocksize); |
3248 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3249 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3250 | ||
3251 | goto set_num_buckets; | |
3252 | } | |
3253 | ||
01225596 | 3254 | /* copy the whole bucket to the new first. */ |
ba937127 | 3255 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3256 | |
3257 | /* update the new bucket. */ | |
ba937127 | 3258 | xh = bucket_xh(t_bucket); |
01225596 TM |
3259 | |
3260 | /* | |
3261 | * Calculate the total name/value len and xh_free_start for | |
3262 | * the old bucket first. | |
3263 | */ | |
3264 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3265 | name_value_len = 0; | |
3266 | for (i = 0; i < start; i++) { | |
3267 | xe = &xh->xh_entries[i]; | |
3268 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3269 | if (ocfs2_xattr_is_local(xe)) | |
3270 | xe_len += | |
3271 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3272 | else | |
3273 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3274 | name_value_len += xe_len; | |
3275 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3276 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3277 | } | |
3278 | ||
3279 | /* | |
3280 | * Now begin the modification to the new bucket. | |
3281 | * | |
3282 | * In the new bucket, We just move the xattr entry to the beginning | |
3283 | * and don't touch the name/value. So there will be some holes in the | |
3284 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3285 | * called. | |
3286 | */ | |
3287 | xe = &xh->xh_entries[start]; | |
3288 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3289 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3290 | (int)((char *)xe - (char *)xh), |
3291 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3292 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3293 | xe = &xh->xh_entries[count - start]; | |
3294 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3295 | memset((char *)xe, 0, len); | |
3296 | ||
3297 | le16_add_cpu(&xh->xh_count, -start); | |
3298 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3299 | ||
3300 | /* Calculate xh_free_start for the new bucket. */ | |
3301 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3302 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3303 | xe = &xh->xh_entries[i]; | |
3304 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3305 | if (ocfs2_xattr_is_local(xe)) | |
3306 | xe_len += | |
3307 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3308 | else | |
3309 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3310 | if (le16_to_cpu(xe->xe_name_offset) < | |
3311 | le16_to_cpu(xh->xh_free_start)) | |
3312 | xh->xh_free_start = xe->xe_name_offset; | |
3313 | } | |
3314 | ||
80bcaf34 | 3315 | set_num_buckets: |
01225596 TM |
3316 | /* set xh->xh_num_buckets for the new xh. */ |
3317 | if (new_bucket_head) | |
3318 | xh->xh_num_buckets = cpu_to_le16(1); | |
3319 | else | |
3320 | xh->xh_num_buckets = 0; | |
3321 | ||
ba937127 | 3322 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3323 | |
3324 | /* store the first_hash of the new bucket. */ | |
3325 | if (first_hash) | |
3326 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3327 | ||
3328 | /* | |
80bcaf34 TM |
3329 | * Now only update the 1st block of the old bucket. If we |
3330 | * just added a new empty bucket, there is no need to modify | |
3331 | * it. | |
01225596 | 3332 | */ |
80bcaf34 TM |
3333 | if (start == count) |
3334 | goto out; | |
3335 | ||
ba937127 | 3336 | xh = bucket_xh(s_bucket); |
01225596 TM |
3337 | memset(&xh->xh_entries[start], 0, |
3338 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3339 | xh->xh_count = cpu_to_le16(start); | |
3340 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3341 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3342 | ||
ba937127 | 3343 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3344 | |
3345 | out: | |
ba937127 JB |
3346 | ocfs2_xattr_bucket_free(s_bucket); |
3347 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3348 | |
3349 | return ret; | |
3350 | } | |
3351 | ||
3352 | /* | |
3353 | * Copy xattr from one bucket to another bucket. | |
3354 | * | |
3355 | * The caller must make sure that the journal transaction | |
3356 | * has enough space for journaling. | |
3357 | */ | |
3358 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3359 | handle_t *handle, | |
3360 | u64 s_blkno, | |
3361 | u64 t_blkno, | |
3362 | int t_is_new) | |
3363 | { | |
4980c6da | 3364 | int ret; |
ba937127 | 3365 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3366 | |
3367 | BUG_ON(s_blkno == t_blkno); | |
3368 | ||
3369 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3370 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3371 | t_is_new); | |
01225596 | 3372 | |
ba937127 JB |
3373 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3374 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3375 | if (!s_bucket || !t_bucket) { | |
3376 | ret = -ENOMEM; | |
3377 | mlog_errno(ret); | |
3378 | goto out; | |
3379 | } | |
3380 | ||
3381 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); | |
01225596 TM |
3382 | if (ret) |
3383 | goto out; | |
3384 | ||
784b816a JB |
3385 | /* |
3386 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3387 | * there's no need to read it. | |
3388 | */ | |
ba937127 | 3389 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3390 | if (ret) |
3391 | goto out; | |
3392 | ||
ba937127 | 3393 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3394 | t_is_new ? |
3395 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3396 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3397 | if (ret) | |
3398 | goto out; | |
01225596 | 3399 | |
ba937127 JB |
3400 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
3401 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
3402 | |
3403 | out: | |
ba937127 JB |
3404 | ocfs2_xattr_bucket_free(t_bucket); |
3405 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
3406 | |
3407 | return ret; | |
3408 | } | |
3409 | ||
3410 | /* | |
3411 | * Copy one xattr cluster from src_blk to to_blk. | |
3412 | * The to_blk will become the first bucket header of the cluster, so its | |
3413 | * xh_num_buckets will be initialized as the bucket num in the cluster. | |
3414 | */ | |
3415 | static int ocfs2_cp_xattr_cluster(struct inode *inode, | |
3416 | handle_t *handle, | |
3417 | struct buffer_head *first_bh, | |
3418 | u64 src_blk, | |
3419 | u64 to_blk, | |
3420 | u32 *first_hash) | |
3421 | { | |
3422 | int i, ret, credits; | |
3423 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3424 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3425 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3426 | struct buffer_head *bh = NULL; | |
3427 | struct ocfs2_xattr_header *xh; | |
3428 | u64 to_blk_start = to_blk; | |
3429 | ||
de29c085 MF |
3430 | mlog(0, "cp xattrs from cluster %llu to %llu\n", |
3431 | (unsigned long long)src_blk, (unsigned long long)to_blk); | |
01225596 TM |
3432 | |
3433 | /* | |
3434 | * We need to update the new cluster and 1 more for the update of | |
3435 | * the 1st bucket of the previous extent rec. | |
3436 | */ | |
3437 | credits = bpc + 1; | |
3438 | ret = ocfs2_extend_trans(handle, credits); | |
3439 | if (ret) { | |
3440 | mlog_errno(ret); | |
3441 | goto out; | |
3442 | } | |
3443 | ||
3444 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3445 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3446 | if (ret) { | |
3447 | mlog_errno(ret); | |
3448 | goto out; | |
3449 | } | |
3450 | ||
3451 | for (i = 0; i < num_buckets; i++) { | |
3452 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
3453 | src_blk, to_blk, 1); | |
3454 | if (ret) { | |
3455 | mlog_errno(ret); | |
3456 | goto out; | |
3457 | } | |
3458 | ||
3459 | src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3460 | to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3461 | } | |
3462 | ||
3463 | /* update the old bucket header. */ | |
3464 | xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3465 | le16_add_cpu(&xh->xh_num_buckets, -num_buckets); | |
3466 | ||
3467 | ocfs2_journal_dirty(handle, first_bh); | |
3468 | ||
3469 | /* update the new bucket header. */ | |
0fcaa56a | 3470 | ret = ocfs2_read_block(inode, to_blk_start, &bh); |
01225596 TM |
3471 | if (ret < 0) { |
3472 | mlog_errno(ret); | |
3473 | goto out; | |
3474 | } | |
3475 | ||
3476 | ret = ocfs2_journal_access(handle, inode, bh, | |
3477 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3478 | if (ret) { | |
3479 | mlog_errno(ret); | |
3480 | goto out; | |
3481 | } | |
3482 | ||
3483 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
3484 | xh->xh_num_buckets = cpu_to_le16(num_buckets); | |
3485 | ||
3486 | ocfs2_journal_dirty(handle, bh); | |
3487 | ||
3488 | if (first_hash) | |
3489 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3490 | out: | |
3491 | brelse(bh); | |
3492 | return ret; | |
3493 | } | |
3494 | ||
3495 | /* | |
80bcaf34 | 3496 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
3497 | * This function should only be called when bucket size == cluster size. |
3498 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
3499 | */ | |
80bcaf34 TM |
3500 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
3501 | handle_t *handle, | |
3502 | u64 prev_blk, | |
3503 | u64 new_blk, | |
3504 | u32 *first_hash) | |
01225596 TM |
3505 | { |
3506 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3507 | int ret, credits = 2 * blk_per_bucket; | |
3508 | ||
3509 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
3510 | ||
3511 | ret = ocfs2_extend_trans(handle, credits); | |
3512 | if (ret) { | |
3513 | mlog_errno(ret); | |
3514 | return ret; | |
3515 | } | |
3516 | ||
3517 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
3518 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
3519 | new_blk, first_hash, 1); | |
01225596 TM |
3520 | } |
3521 | ||
3522 | /* | |
3523 | * Move some xattrs from the old cluster to the new one since they are not | |
3524 | * contiguous in ocfs2 xattr tree. | |
3525 | * | |
3526 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
3527 | * prev_blk to it. v_start will be set as the first name hash value in this | |
3528 | * new cluster so that it can be used as e_cpos during tree insertion and | |
3529 | * don't collide with our original b-tree operations. first_bh and header_bh | |
3530 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
3531 | * to extend the insert bucket. | |
3532 | * | |
3533 | * The problem is how much xattr should we move to the new one and when should | |
3534 | * we update first_bh and header_bh? | |
3535 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
3536 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
3537 | * update the first_bh and header_bh if the insert bucket has been moved | |
3538 | * to the new cluster. | |
3539 | * 2. If cluster_size == bucket_size: | |
3540 | * a) If the previous extent rec has more than one cluster and the insert | |
3541 | * place isn't in the last cluster, copy the entire last cluster to the | |
3542 | * new one. This time, we don't need to upate the first_bh and header_bh | |
3543 | * since they will not be moved into the new cluster. | |
3544 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
3545 | * the new one. And we set the extend flag to zero if the insert place is | |
3546 | * moved into the new allocated cluster since no extend is needed. | |
3547 | */ | |
3548 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
3549 | handle_t *handle, | |
3550 | struct buffer_head **first_bh, | |
3551 | struct buffer_head **header_bh, | |
3552 | u64 new_blk, | |
3553 | u64 prev_blk, | |
3554 | u32 prev_clusters, | |
3555 | u32 *v_start, | |
3556 | int *extend) | |
3557 | { | |
3558 | int ret = 0; | |
3559 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3560 | ||
3561 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
de29c085 MF |
3562 | (unsigned long long)prev_blk, prev_clusters, |
3563 | (unsigned long long)new_blk); | |
01225596 TM |
3564 | |
3565 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) | |
3566 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, | |
3567 | handle, | |
3568 | first_bh, | |
3569 | header_bh, | |
3570 | new_blk, | |
3571 | prev_blk, | |
3572 | prev_clusters, | |
3573 | v_start); | |
3574 | else { | |
3575 | u64 last_blk = prev_blk + bpc * (prev_clusters - 1); | |
3576 | ||
3577 | if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) | |
3578 | ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, | |
3579 | last_blk, new_blk, | |
3580 | v_start); | |
3581 | else { | |
80bcaf34 TM |
3582 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
3583 | last_blk, new_blk, | |
3584 | v_start); | |
01225596 TM |
3585 | |
3586 | if ((*header_bh)->b_blocknr == last_blk && extend) | |
3587 | *extend = 0; | |
3588 | } | |
3589 | } | |
3590 | ||
3591 | return ret; | |
3592 | } | |
3593 | ||
3594 | /* | |
3595 | * Add a new cluster for xattr storage. | |
3596 | * | |
3597 | * If the new cluster is contiguous with the previous one, it will be | |
3598 | * appended to the same extent record, and num_clusters will be updated. | |
3599 | * If not, we will insert a new extent for it and move some xattrs in | |
3600 | * the last cluster into the new allocated one. | |
3601 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
3602 | * lose the benefits of hashing because we'll have to search large leaves. | |
3603 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
3604 | * if it's bigger). | |
3605 | * | |
3606 | * first_bh is the first block of the previous extent rec and header_bh | |
3607 | * indicates the bucket we will insert the new xattrs. They will be updated | |
3608 | * when the header_bh is moved into the new cluster. | |
3609 | */ | |
3610 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
3611 | struct buffer_head *root_bh, | |
3612 | struct buffer_head **first_bh, | |
3613 | struct buffer_head **header_bh, | |
3614 | u32 *num_clusters, | |
3615 | u32 prev_cpos, | |
3616 | u64 prev_blkno, | |
3617 | int *extend) | |
3618 | { | |
3619 | int ret, credits; | |
3620 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3621 | u32 prev_clusters = *num_clusters; | |
3622 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
3623 | u64 block; | |
3624 | handle_t *handle = NULL; | |
3625 | struct ocfs2_alloc_context *data_ac = NULL; | |
3626 | struct ocfs2_alloc_context *meta_ac = NULL; | |
3627 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 3628 | struct ocfs2_extent_tree et; |
01225596 TM |
3629 | |
3630 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
3631 | "previous xattr blkno = %llu\n", | |
3632 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
de29c085 | 3633 | prev_cpos, (unsigned long long)prev_blkno); |
01225596 | 3634 | |
8d6220d6 | 3635 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c JB |
3636 | |
3637 | ret = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, | |
3638 | &data_ac, &meta_ac); | |
01225596 TM |
3639 | if (ret) { |
3640 | mlog_errno(ret); | |
3641 | goto leave; | |
3642 | } | |
3643 | ||
f99b9b7c JB |
3644 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
3645 | clusters_to_add); | |
01225596 TM |
3646 | handle = ocfs2_start_trans(osb, credits); |
3647 | if (IS_ERR(handle)) { | |
3648 | ret = PTR_ERR(handle); | |
3649 | handle = NULL; | |
3650 | mlog_errno(ret); | |
3651 | goto leave; | |
3652 | } | |
3653 | ||
3654 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
3655 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3656 | if (ret < 0) { | |
3657 | mlog_errno(ret); | |
3658 | goto leave; | |
3659 | } | |
3660 | ||
3661 | ret = __ocfs2_claim_clusters(osb, handle, data_ac, 1, | |
3662 | clusters_to_add, &bit_off, &num_bits); | |
3663 | if (ret < 0) { | |
3664 | if (ret != -ENOSPC) | |
3665 | mlog_errno(ret); | |
3666 | goto leave; | |
3667 | } | |
3668 | ||
3669 | BUG_ON(num_bits > clusters_to_add); | |
3670 | ||
3671 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
3672 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
3673 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
3674 | ||
3675 | if (prev_blkno + prev_clusters * bpc == block && | |
3676 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= | |
3677 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
3678 | /* | |
3679 | * If this cluster is contiguous with the old one and | |
3680 | * adding this new cluster, we don't surpass the limit of | |
3681 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
3682 | * initialized and used like other buckets in the previous | |
3683 | * cluster. | |
3684 | * So add it as a contiguous one. The caller will handle | |
3685 | * its init process. | |
3686 | */ | |
3687 | v_start = prev_cpos + prev_clusters; | |
3688 | *num_clusters = prev_clusters + num_bits; | |
3689 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
3690 | num_bits); | |
3691 | } else { | |
3692 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
3693 | handle, | |
3694 | first_bh, | |
3695 | header_bh, | |
3696 | block, | |
3697 | prev_blkno, | |
3698 | prev_clusters, | |
3699 | &v_start, | |
3700 | extend); | |
3701 | if (ret) { | |
3702 | mlog_errno(ret); | |
3703 | goto leave; | |
3704 | } | |
3705 | } | |
3706 | ||
28b8ca0b TM |
3707 | if (handle->h_buffer_credits < credits) { |
3708 | /* | |
3709 | * The journal has been restarted before, and don't | |
3710 | * have enough space for the insertion, so extend it | |
3711 | * here. | |
3712 | */ | |
3713 | ret = ocfs2_extend_trans(handle, credits); | |
3714 | if (ret) { | |
3715 | mlog_errno(ret); | |
3716 | goto leave; | |
3717 | } | |
3718 | } | |
01225596 | 3719 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", |
de29c085 | 3720 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c JB |
3721 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
3722 | num_bits, 0, meta_ac); | |
01225596 TM |
3723 | if (ret < 0) { |
3724 | mlog_errno(ret); | |
3725 | goto leave; | |
3726 | } | |
3727 | ||
3728 | ret = ocfs2_journal_dirty(handle, root_bh); | |
3729 | if (ret < 0) { | |
3730 | mlog_errno(ret); | |
3731 | goto leave; | |
3732 | } | |
3733 | ||
3734 | leave: | |
3735 | if (handle) | |
3736 | ocfs2_commit_trans(osb, handle); | |
3737 | if (data_ac) | |
3738 | ocfs2_free_alloc_context(data_ac); | |
3739 | if (meta_ac) | |
3740 | ocfs2_free_alloc_context(meta_ac); | |
3741 | ||
3742 | return ret; | |
3743 | } | |
3744 | ||
3745 | /* | |
3746 | * Extend a new xattr bucket and move xattrs to the end one by one until | |
3747 | * We meet with start_bh. Only move half of the xattrs to the bucket after it. | |
3748 | */ | |
3749 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
3750 | struct buffer_head *first_bh, | |
3751 | struct buffer_head *start_bh, | |
3752 | u32 num_clusters) | |
3753 | { | |
3754 | int ret, credits; | |
3755 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3756 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3757 | u64 start_blk = start_bh->b_blocknr, end_blk; | |
3758 | u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); | |
3759 | handle_t *handle; | |
3760 | struct ocfs2_xattr_header *first_xh = | |
3761 | (struct ocfs2_xattr_header *)first_bh->b_data; | |
3762 | u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); | |
3763 | ||
3764 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
de29c085 | 3765 | "from %llu, len = %u\n", (unsigned long long)start_blk, |
01225596 TM |
3766 | (unsigned long long)first_bh->b_blocknr, num_clusters); |
3767 | ||
3768 | BUG_ON(bucket >= num_buckets); | |
3769 | ||
3770 | end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; | |
3771 | ||
3772 | /* | |
3773 | * We will touch all the buckets after the start_bh(include it). | |
1224be02 | 3774 | * Then we add one more bucket. |
01225596 | 3775 | */ |
1224be02 | 3776 | credits = end_blk - start_blk + 3 * blk_per_bucket + 1; |
01225596 TM |
3777 | handle = ocfs2_start_trans(osb, credits); |
3778 | if (IS_ERR(handle)) { | |
3779 | ret = PTR_ERR(handle); | |
3780 | handle = NULL; | |
3781 | mlog_errno(ret); | |
3782 | goto out; | |
3783 | } | |
3784 | ||
3785 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3786 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3787 | if (ret) { | |
3788 | mlog_errno(ret); | |
3789 | goto commit; | |
3790 | } | |
3791 | ||
3792 | while (end_blk != start_blk) { | |
3793 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, | |
3794 | end_blk + blk_per_bucket, 0); | |
3795 | if (ret) | |
3796 | goto commit; | |
3797 | end_blk -= blk_per_bucket; | |
3798 | } | |
3799 | ||
3800 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
3801 | ret = ocfs2_divide_xattr_bucket(inode, handle, start_blk, |
3802 | start_blk + blk_per_bucket, NULL, 0); | |
01225596 TM |
3803 | |
3804 | le16_add_cpu(&first_xh->xh_num_buckets, 1); | |
3805 | ocfs2_journal_dirty(handle, first_bh); | |
3806 | ||
3807 | commit: | |
3808 | ocfs2_commit_trans(osb, handle); | |
3809 | out: | |
3810 | return ret; | |
3811 | } | |
3812 | ||
3813 | /* | |
3814 | * Add new xattr bucket in an extent record and adjust the buckets accordingly. | |
3815 | * xb_bh is the ocfs2_xattr_block. | |
3816 | * We will move all the buckets starting from header_bh to the next place. As | |
3817 | * for this one, half num of its xattrs will be moved to the next one. | |
3818 | * | |
3819 | * We will allocate a new cluster if current cluster is full and adjust | |
3820 | * header_bh and first_bh if the insert place is moved to the new cluster. | |
3821 | */ | |
3822 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
3823 | struct buffer_head *xb_bh, | |
3824 | struct buffer_head *header_bh) | |
3825 | { | |
3826 | struct ocfs2_xattr_header *first_xh = NULL; | |
3827 | struct buffer_head *first_bh = NULL; | |
3828 | struct ocfs2_xattr_block *xb = | |
3829 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3830 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3831 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3832 | struct ocfs2_xattr_header *xh = | |
3833 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
3834 | u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3835 | struct super_block *sb = inode->i_sb; | |
3836 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
3837 | int ret, num_buckets, extend = 1; | |
3838 | u64 p_blkno; | |
3839 | u32 e_cpos, num_clusters; | |
3840 | ||
3841 | mlog(0, "Add new xattr bucket starting form %llu\n", | |
3842 | (unsigned long long)header_bh->b_blocknr); | |
3843 | ||
3844 | /* | |
3845 | * Add refrence for header_bh here because it may be | |
3846 | * changed in ocfs2_add_new_xattr_cluster and we need | |
3847 | * to free it in the end. | |
3848 | */ | |
3849 | get_bh(header_bh); | |
3850 | ||
3851 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, | |
3852 | &num_clusters, el); | |
3853 | if (ret) { | |
3854 | mlog_errno(ret); | |
3855 | goto out; | |
3856 | } | |
3857 | ||
0fcaa56a | 3858 | ret = ocfs2_read_block(inode, p_blkno, &first_bh); |
01225596 TM |
3859 | if (ret) { |
3860 | mlog_errno(ret); | |
3861 | goto out; | |
3862 | } | |
3863 | ||
3864 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; | |
3865 | first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3866 | ||
3867 | if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { | |
3868 | ret = ocfs2_add_new_xattr_cluster(inode, | |
3869 | xb_bh, | |
3870 | &first_bh, | |
3871 | &header_bh, | |
3872 | &num_clusters, | |
3873 | e_cpos, | |
3874 | p_blkno, | |
3875 | &extend); | |
3876 | if (ret) { | |
3877 | mlog_errno(ret); | |
3878 | goto out; | |
3879 | } | |
3880 | } | |
3881 | ||
3882 | if (extend) | |
3883 | ret = ocfs2_extend_xattr_bucket(inode, | |
3884 | first_bh, | |
3885 | header_bh, | |
3886 | num_clusters); | |
3887 | if (ret) | |
3888 | mlog_errno(ret); | |
3889 | out: | |
3890 | brelse(first_bh); | |
3891 | brelse(header_bh); | |
3892 | return ret; | |
3893 | } | |
3894 | ||
3895 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
3896 | struct ocfs2_xattr_bucket *bucket, | |
3897 | int offs) | |
3898 | { | |
3899 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
3900 | ||
3901 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 3902 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
3903 | } |
3904 | ||
3905 | /* | |
3906 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
3907 | * |
3908 | * Note: "local" indicates the real data's locality. So we can't | |
3909 | * just its bucket locality by its length. | |
3910 | */ | |
3911 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
3912 | struct ocfs2_xattr_info *xi, | |
3913 | struct ocfs2_xattr_search *xs, | |
3914 | u32 name_hash, | |
5a095611 | 3915 | int local) |
01225596 TM |
3916 | { |
3917 | struct ocfs2_xattr_entry *last, *xe; | |
3918 | int name_len = strlen(xi->name); | |
3919 | struct ocfs2_xattr_header *xh = xs->header; | |
3920 | u16 count = le16_to_cpu(xh->xh_count), start; | |
3921 | size_t blocksize = inode->i_sb->s_blocksize; | |
3922 | char *val; | |
3923 | size_t offs, size, new_size; | |
3924 | ||
3925 | last = &xh->xh_entries[count]; | |
3926 | if (!xs->not_found) { | |
3927 | xe = xs->here; | |
3928 | offs = le16_to_cpu(xe->xe_name_offset); | |
3929 | if (ocfs2_xattr_is_local(xe)) | |
3930 | size = OCFS2_XATTR_SIZE(name_len) + | |
3931 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3932 | else | |
3933 | size = OCFS2_XATTR_SIZE(name_len) + | |
3934 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
3935 | ||
3936 | /* | |
3937 | * If the new value will be stored outside, xi->value has been | |
3938 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
3939 | * goes with xi->value_len, so we can set new_size safely here. | |
3940 | * See ocfs2_xattr_set_in_bucket. | |
3941 | */ | |
3942 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
3943 | OCFS2_XATTR_SIZE(xi->value_len); | |
3944 | ||
3945 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
3946 | if (xi->value) { | |
3947 | if (new_size > size) | |
3948 | goto set_new_name_value; | |
3949 | ||
3950 | /* Now replace the old value with new one. */ | |
3951 | if (local) | |
3952 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
3953 | else | |
3954 | xe->xe_value_size = 0; | |
3955 | ||
3956 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 3957 | xs->bucket, offs); |
01225596 TM |
3958 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
3959 | size - OCFS2_XATTR_SIZE(name_len)); | |
3960 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
3961 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
3962 | xi->value, xi->value_len); | |
3963 | ||
3964 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
3965 | ocfs2_xattr_set_local(xe, local); | |
3966 | return; | |
3967 | } else { | |
5a095611 TM |
3968 | /* |
3969 | * Remove the old entry if there is more than one. | |
3970 | * We don't remove the last entry so that we can | |
3971 | * use it to indicate the hash value of the empty | |
3972 | * bucket. | |
3973 | */ | |
01225596 | 3974 | last -= 1; |
01225596 | 3975 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
3976 | if (xh->xh_count) { |
3977 | memmove(xe, xe + 1, | |
3978 | (void *)last - (void *)xe); | |
3979 | memset(last, 0, | |
3980 | sizeof(struct ocfs2_xattr_entry)); | |
3981 | } else | |
3982 | xh->xh_free_start = | |
3983 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3984 | ||
01225596 TM |
3985 | return; |
3986 | } | |
3987 | } else { | |
3988 | /* find a new entry for insert. */ | |
3989 | int low = 0, high = count - 1, tmp; | |
3990 | struct ocfs2_xattr_entry *tmp_xe; | |
3991 | ||
5a095611 | 3992 | while (low <= high && count) { |
01225596 TM |
3993 | tmp = (low + high) / 2; |
3994 | tmp_xe = &xh->xh_entries[tmp]; | |
3995 | ||
3996 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
3997 | low = tmp + 1; | |
3998 | else if (name_hash < | |
3999 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4000 | high = tmp - 1; | |
06b240d8 TM |
4001 | else { |
4002 | low = tmp; | |
01225596 | 4003 | break; |
06b240d8 | 4004 | } |
01225596 TM |
4005 | } |
4006 | ||
4007 | xe = &xh->xh_entries[low]; | |
4008 | if (low != count) | |
4009 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4010 | ||
4011 | le16_add_cpu(&xh->xh_count, 1); | |
4012 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4013 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4014 | xe->xe_name_len = name_len; | |
4015 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4016 | } | |
4017 | ||
4018 | set_new_name_value: | |
4019 | /* Insert the new name+value. */ | |
4020 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4021 | ||
4022 | /* | |
4023 | * We must make sure that the name/value pair | |
4024 | * exists in the same block. | |
4025 | */ | |
4026 | offs = le16_to_cpu(xh->xh_free_start); | |
4027 | start = offs - size; | |
4028 | ||
4029 | if (start >> inode->i_sb->s_blocksize_bits != | |
4030 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4031 | offs = offs - offs % blocksize; | |
4032 | xh->xh_free_start = cpu_to_le16(offs); | |
4033 | } | |
4034 | ||
ba937127 | 4035 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4036 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4037 | ||
4038 | memset(val, 0, size); | |
4039 | memcpy(val, xi->name, name_len); | |
4040 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4041 | ||
4042 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4043 | ocfs2_xattr_set_local(xe, local); | |
4044 | xs->here = xe; | |
4045 | le16_add_cpu(&xh->xh_free_start, -size); | |
4046 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4047 | ||
4048 | return; | |
4049 | } | |
4050 | ||
01225596 TM |
4051 | /* |
4052 | * Set the xattr entry in the specified bucket. | |
4053 | * The bucket is indicated by xs->bucket and it should have the enough | |
4054 | * space for the xattr insertion. | |
4055 | */ | |
4056 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
4057 | struct ocfs2_xattr_info *xi, | |
4058 | struct ocfs2_xattr_search *xs, | |
4059 | u32 name_hash, | |
5a095611 | 4060 | int local) |
01225596 | 4061 | { |
1224be02 | 4062 | int ret; |
01225596 | 4063 | handle_t *handle = NULL; |
01225596 | 4064 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
02dbf38d | 4065 | u64 blkno; |
01225596 | 4066 | |
ff1ec20e MF |
4067 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4068 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4069 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4070 | |
ba937127 | 4071 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4072 | blkno = bucket_blkno(xs->bucket); |
4073 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4074 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4075 | if (ret) { |
4076 | mlog_errno(ret); | |
4077 | goto out; | |
4078 | } | |
4079 | } | |
4080 | ||
02dbf38d | 4081 | handle = ocfs2_start_trans(osb, xs->bucket->bu_blocks); |
01225596 TM |
4082 | if (IS_ERR(handle)) { |
4083 | ret = PTR_ERR(handle); | |
4084 | handle = NULL; | |
4085 | mlog_errno(ret); | |
4086 | goto out; | |
4087 | } | |
4088 | ||
ba937127 | 4089 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4090 | OCFS2_JOURNAL_ACCESS_WRITE); |
4091 | if (ret < 0) { | |
4092 | mlog_errno(ret); | |
4093 | goto out; | |
01225596 TM |
4094 | } |
4095 | ||
5a095611 | 4096 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4097 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4098 | |
01225596 TM |
4099 | out: |
4100 | ocfs2_commit_trans(osb, handle); | |
4101 | ||
4102 | return ret; | |
4103 | } | |
4104 | ||
4105 | static int ocfs2_xattr_value_update_size(struct inode *inode, | |
4106 | struct buffer_head *xe_bh, | |
4107 | struct ocfs2_xattr_entry *xe, | |
4108 | u64 new_size) | |
4109 | { | |
4110 | int ret; | |
4111 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4112 | handle_t *handle = NULL; | |
4113 | ||
4114 | handle = ocfs2_start_trans(osb, 1); | |
d3264799 | 4115 | if (IS_ERR(handle)) { |
01225596 TM |
4116 | ret = -ENOMEM; |
4117 | mlog_errno(ret); | |
4118 | goto out; | |
4119 | } | |
4120 | ||
4121 | ret = ocfs2_journal_access(handle, inode, xe_bh, | |
4122 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4123 | if (ret < 0) { | |
4124 | mlog_errno(ret); | |
4125 | goto out_commit; | |
4126 | } | |
4127 | ||
4128 | xe->xe_value_size = cpu_to_le64(new_size); | |
4129 | ||
4130 | ret = ocfs2_journal_dirty(handle, xe_bh); | |
4131 | if (ret < 0) | |
4132 | mlog_errno(ret); | |
4133 | ||
4134 | out_commit: | |
4135 | ocfs2_commit_trans(osb, handle); | |
4136 | out: | |
4137 | return ret; | |
4138 | } | |
4139 | ||
4140 | /* | |
4141 | * Truncate the specified xe_off entry in xattr bucket. | |
4142 | * bucket is indicated by header_bh and len is the new length. | |
4143 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4144 | * | |
4145 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4146 | */ | |
4147 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
4148 | struct buffer_head *header_bh, | |
4149 | int xe_off, | |
4150 | int len) | |
4151 | { | |
4152 | int ret, offset; | |
4153 | u64 value_blk; | |
4154 | struct buffer_head *value_bh = NULL; | |
4155 | struct ocfs2_xattr_value_root *xv; | |
4156 | struct ocfs2_xattr_entry *xe; | |
4157 | struct ocfs2_xattr_header *xh = | |
4158 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4159 | size_t blocksize = inode->i_sb->s_blocksize; | |
4160 | ||
4161 | xe = &xh->xh_entries[xe_off]; | |
4162 | ||
4163 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4164 | ||
4165 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4166 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4167 | ||
4168 | value_blk = offset / blocksize; | |
4169 | ||
4170 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4171 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
4172 | value_blk += header_bh->b_blocknr; | |
4173 | ||
0fcaa56a | 4174 | ret = ocfs2_read_block(inode, value_blk, &value_bh); |
01225596 TM |
4175 | if (ret) { |
4176 | mlog_errno(ret); | |
4177 | goto out; | |
4178 | } | |
4179 | ||
4180 | xv = (struct ocfs2_xattr_value_root *) | |
4181 | (value_bh->b_data + offset % blocksize); | |
4182 | ||
4183 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4184 | xe_off, (unsigned long long)header_bh->b_blocknr, len); | |
4185 | ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len); | |
4186 | if (ret) { | |
4187 | mlog_errno(ret); | |
4188 | goto out; | |
4189 | } | |
4190 | ||
4191 | ret = ocfs2_xattr_value_update_size(inode, header_bh, xe, len); | |
4192 | if (ret) { | |
4193 | mlog_errno(ret); | |
4194 | goto out; | |
4195 | } | |
4196 | ||
4197 | out: | |
4198 | brelse(value_bh); | |
4199 | return ret; | |
4200 | } | |
4201 | ||
4202 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
4203 | struct ocfs2_xattr_search *xs, | |
4204 | int len) | |
4205 | { | |
4206 | int ret, offset; | |
4207 | struct ocfs2_xattr_entry *xe = xs->here; | |
4208 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4209 | ||
ba937127 | 4210 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4211 | |
4212 | offset = xe - xh->xh_entries; | |
ba937127 | 4213 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket->bu_bhs[0], |
01225596 TM |
4214 | offset, len); |
4215 | if (ret) | |
4216 | mlog_errno(ret); | |
4217 | ||
4218 | return ret; | |
4219 | } | |
4220 | ||
4221 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
4222 | struct ocfs2_xattr_search *xs, | |
4223 | char *val, | |
4224 | int value_len) | |
4225 | { | |
4226 | int offset; | |
4227 | struct ocfs2_xattr_value_root *xv; | |
4228 | struct ocfs2_xattr_entry *xe = xs->here; | |
4229 | ||
4230 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4231 | ||
4232 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4233 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4234 | ||
4235 | xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); | |
4236 | ||
4237 | return __ocfs2_xattr_set_value_outside(inode, xv, val, value_len); | |
4238 | } | |
4239 | ||
01225596 TM |
4240 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4241 | struct buffer_head *root_bh, | |
4242 | u64 blkno, | |
4243 | u32 cpos, | |
4244 | u32 len) | |
4245 | { | |
4246 | int ret; | |
4247 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4248 | struct inode *tl_inode = osb->osb_tl_inode; | |
4249 | handle_t *handle; | |
4250 | struct ocfs2_xattr_block *xb = | |
4251 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4252 | struct ocfs2_alloc_context *meta_ac = NULL; |
4253 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4254 | struct ocfs2_extent_tree et; |
4255 | ||
8d6220d6 | 4256 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4257 | |
4258 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4259 | ||
4260 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4261 | cpos, len, (unsigned long long)blkno); | |
4262 | ||
4263 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4264 | ||
f99b9b7c | 4265 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4266 | if (ret) { |
4267 | mlog_errno(ret); | |
4268 | return ret; | |
4269 | } | |
4270 | ||
4271 | mutex_lock(&tl_inode->i_mutex); | |
4272 | ||
4273 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4274 | ret = __ocfs2_flush_truncate_log(osb); | |
4275 | if (ret < 0) { | |
4276 | mlog_errno(ret); | |
4277 | goto out; | |
4278 | } | |
4279 | } | |
4280 | ||
4281 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
d3264799 | 4282 | if (IS_ERR(handle)) { |
01225596 TM |
4283 | ret = -ENOMEM; |
4284 | mlog_errno(ret); | |
4285 | goto out; | |
4286 | } | |
4287 | ||
4288 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
4289 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4290 | if (ret) { | |
4291 | mlog_errno(ret); | |
4292 | goto out_commit; | |
4293 | } | |
4294 | ||
f99b9b7c JB |
4295 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4296 | &dealloc); | |
01225596 TM |
4297 | if (ret) { |
4298 | mlog_errno(ret); | |
4299 | goto out_commit; | |
4300 | } | |
4301 | ||
4302 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4303 | ||
4304 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4305 | if (ret) { | |
4306 | mlog_errno(ret); | |
4307 | goto out_commit; | |
4308 | } | |
4309 | ||
4310 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4311 | if (ret) | |
4312 | mlog_errno(ret); | |
4313 | ||
4314 | out_commit: | |
4315 | ocfs2_commit_trans(osb, handle); | |
4316 | out: | |
4317 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4318 | ||
4319 | mutex_unlock(&tl_inode->i_mutex); | |
4320 | ||
4321 | if (meta_ac) | |
4322 | ocfs2_free_alloc_context(meta_ac); | |
4323 | ||
4324 | ocfs2_run_deallocs(osb, &dealloc); | |
4325 | ||
4326 | return ret; | |
4327 | } | |
4328 | ||
01225596 TM |
4329 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
4330 | struct ocfs2_xattr_search *xs) | |
4331 | { | |
4332 | handle_t *handle = NULL; | |
ba937127 | 4333 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4334 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4335 | le16_to_cpu(xh->xh_count) - 1]; | |
4336 | int ret = 0; | |
4337 | ||
1224be02 JB |
4338 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), |
4339 | ocfs2_blocks_per_xattr_bucket(inode->i_sb)); | |
01225596 TM |
4340 | if (IS_ERR(handle)) { |
4341 | ret = PTR_ERR(handle); | |
4342 | mlog_errno(ret); | |
4343 | return; | |
4344 | } | |
4345 | ||
ba937127 | 4346 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4347 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4348 | if (ret) { |
4349 | mlog_errno(ret); | |
4350 | goto out_commit; | |
4351 | } | |
4352 | ||
4353 | /* Remove the old entry. */ | |
4354 | memmove(xs->here, xs->here + 1, | |
4355 | (void *)last - (void *)xs->here); | |
4356 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4357 | le16_add_cpu(&xh->xh_count, -1); | |
4358 | ||
ba937127 | 4359 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
1224be02 | 4360 | |
01225596 TM |
4361 | out_commit: |
4362 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
4363 | } | |
4364 | ||
4365 | /* | |
4366 | * Set the xattr name/value in the bucket specified in xs. | |
4367 | * | |
4368 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4369 | * we divide the whole process into 3 steps: | |
4370 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4371 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4372 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4373 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4374 | * to free the xattr we allocated in set. | |
4375 | */ | |
4376 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4377 | struct ocfs2_xattr_info *xi, | |
4378 | struct ocfs2_xattr_search *xs) | |
4379 | { | |
5a095611 | 4380 | int ret, local = 1; |
01225596 TM |
4381 | size_t value_len; |
4382 | char *val = (char *)xi->value; | |
4383 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4384 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4385 | strlen(xi->name)); | |
01225596 TM |
4386 | |
4387 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4388 | /* | |
4389 | * We need to truncate the xattr storage first. | |
4390 | * | |
4391 | * If both the old and new value are stored to | |
4392 | * outside block, we only need to truncate | |
4393 | * the storage and then set the value outside. | |
4394 | * | |
4395 | * If the new value should be stored within block, | |
4396 | * we should free all the outside block first and | |
4397 | * the modification to the xattr block will be done | |
4398 | * by following steps. | |
4399 | */ | |
4400 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4401 | value_len = xi->value_len; | |
4402 | else | |
4403 | value_len = 0; | |
4404 | ||
4405 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4406 | value_len); | |
4407 | if (ret) | |
4408 | goto out; | |
4409 | ||
4410 | if (value_len) | |
4411 | goto set_value_outside; | |
4412 | } | |
4413 | ||
4414 | value_len = xi->value_len; | |
4415 | /* So we have to handle the inside block change now. */ | |
4416 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4417 | /* | |
4418 | * If the new value will be stored outside of block, | |
4419 | * initalize a new empty value root and insert it first. | |
4420 | */ | |
4421 | local = 0; | |
4422 | xi->value = &def_xv; | |
4423 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4424 | } | |
4425 | ||
5a095611 | 4426 | ret = ocfs2_xattr_set_entry_in_bucket(inode, xi, xs, name_hash, local); |
01225596 TM |
4427 | if (ret) { |
4428 | mlog_errno(ret); | |
4429 | goto out; | |
4430 | } | |
4431 | ||
5a095611 TM |
4432 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
4433 | goto out; | |
01225596 | 4434 | |
5a095611 TM |
4435 | /* allocate the space now for the outside block storage. */ |
4436 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4437 | value_len); | |
4438 | if (ret) { | |
4439 | mlog_errno(ret); | |
4440 | ||
4441 | if (xs->not_found) { | |
4442 | /* | |
4443 | * We can't allocate enough clusters for outside | |
4444 | * storage and we have allocated xattr already, | |
4445 | * so need to remove it. | |
4446 | */ | |
4447 | ocfs2_xattr_bucket_remove_xs(inode, xs); | |
01225596 | 4448 | } |
01225596 TM |
4449 | goto out; |
4450 | } | |
4451 | ||
4452 | set_value_outside: | |
4453 | ret = ocfs2_xattr_bucket_set_value_outside(inode, xs, val, value_len); | |
4454 | out: | |
4455 | return ret; | |
4456 | } | |
4457 | ||
80bcaf34 TM |
4458 | /* |
4459 | * check whether the xattr bucket is filled up with the same hash value. | |
4460 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
4461 | * If we want to insert a xattr with different hash value, go ahead | |
4462 | * and ocfs2_divide_xattr_bucket will handle this. | |
4463 | */ | |
01225596 | 4464 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
4465 | struct ocfs2_xattr_bucket *bucket, |
4466 | const char *name) | |
01225596 | 4467 | { |
3e632946 | 4468 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
4469 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
4470 | ||
4471 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
4472 | return 0; | |
01225596 TM |
4473 | |
4474 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
4475 | xh->xh_entries[0].xe_name_hash) { | |
4476 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
4477 | "hash = %u\n", | |
9c7759aa | 4478 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
4479 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
4480 | return -ENOSPC; | |
4481 | } | |
4482 | ||
4483 | return 0; | |
4484 | } | |
4485 | ||
4486 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
4487 | struct ocfs2_xattr_info *xi, | |
4488 | struct ocfs2_xattr_search *xs) | |
4489 | { | |
4490 | struct ocfs2_xattr_header *xh; | |
4491 | struct ocfs2_xattr_entry *xe; | |
4492 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 4493 | int free, max_free, need, old; |
01225596 TM |
4494 | size_t value_size = 0, name_len = strlen(xi->name); |
4495 | size_t blocksize = inode->i_sb->s_blocksize; | |
4496 | int ret, allocation = 0; | |
01225596 TM |
4497 | |
4498 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
4499 | ||
4500 | try_again: | |
4501 | xh = xs->header; | |
4502 | count = le16_to_cpu(xh->xh_count); | |
4503 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4504 | header_size = sizeof(struct ocfs2_xattr_header) + | |
4505 | count * sizeof(struct ocfs2_xattr_entry); | |
4506 | max_free = OCFS2_XATTR_BUCKET_SIZE - | |
4507 | le16_to_cpu(xh->xh_name_value_len) - header_size; | |
4508 | ||
4509 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
4510 | "of %u which exceed block size\n", | |
ba937127 | 4511 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
4512 | header_size); |
4513 | ||
4514 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4515 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
4516 | else if (xi->value) | |
4517 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
4518 | ||
4519 | if (xs->not_found) | |
4520 | need = sizeof(struct ocfs2_xattr_entry) + | |
4521 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
4522 | else { | |
4523 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
4524 | ||
4525 | /* | |
4526 | * We only replace the old value if the new length is smaller | |
4527 | * than the old one. Otherwise we will allocate new space in the | |
4528 | * bucket to store it. | |
4529 | */ | |
4530 | xe = xs->here; | |
4531 | if (ocfs2_xattr_is_local(xe)) | |
4532 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4533 | else | |
4534 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4535 | ||
4536 | if (old >= value_size) | |
4537 | need = 0; | |
4538 | } | |
4539 | ||
4540 | free = xh_free_start - header_size; | |
4541 | /* | |
4542 | * We need to make sure the new name/value pair | |
4543 | * can exist in the same block. | |
4544 | */ | |
4545 | if (xh_free_start % blocksize < need) | |
4546 | free -= xh_free_start % blocksize; | |
4547 | ||
4548 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
4549 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
4550 | " %u\n", xs->not_found, | |
ba937127 | 4551 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
4552 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
4553 | le16_to_cpu(xh->xh_name_value_len)); | |
4554 | ||
976331d8 TM |
4555 | if (free < need || |
4556 | (xs->not_found && | |
4557 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
4558 | if (need <= max_free && |
4559 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4560 | /* | |
4561 | * We can create the space by defragment. Since only the | |
4562 | * name/value will be moved, the xe shouldn't be changed | |
4563 | * in xs. | |
4564 | */ | |
ba937127 | 4565 | ret = ocfs2_defrag_xattr_bucket(inode, xs->bucket); |
01225596 TM |
4566 | if (ret) { |
4567 | mlog_errno(ret); | |
4568 | goto out; | |
4569 | } | |
4570 | ||
4571 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4572 | free = xh_free_start - header_size; | |
4573 | if (xh_free_start % blocksize < need) | |
4574 | free -= xh_free_start % blocksize; | |
4575 | ||
4576 | if (free >= need) | |
4577 | goto xattr_set; | |
4578 | ||
4579 | mlog(0, "Can't get enough space for xattr insert by " | |
4580 | "defragment. Need %u bytes, but we have %d, so " | |
4581 | "allocate new bucket for it.\n", need, free); | |
4582 | } | |
4583 | ||
4584 | /* | |
4585 | * We have to add new buckets or clusters and one | |
4586 | * allocation should leave us enough space for insert. | |
4587 | */ | |
4588 | BUG_ON(allocation); | |
4589 | ||
4590 | /* | |
4591 | * We do not allow for overlapping ranges between buckets. And | |
4592 | * the maximum number of collisions we will allow for then is | |
4593 | * one bucket's worth, so check it here whether we need to | |
4594 | * add a new bucket for the insert. | |
4595 | */ | |
80bcaf34 | 4596 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 4597 | xs->bucket, |
80bcaf34 | 4598 | xi->name); |
01225596 TM |
4599 | if (ret) { |
4600 | mlog_errno(ret); | |
4601 | goto out; | |
4602 | } | |
4603 | ||
4604 | ret = ocfs2_add_new_xattr_bucket(inode, | |
4605 | xs->xattr_bh, | |
ba937127 | 4606 | xs->bucket->bu_bhs[0]); |
01225596 TM |
4607 | if (ret) { |
4608 | mlog_errno(ret); | |
4609 | goto out; | |
4610 | } | |
4611 | ||
ba937127 | 4612 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
4613 | |
4614 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
4615 | xi->name_index, | |
4616 | xi->name, xs); | |
4617 | if (ret && ret != -ENODATA) | |
4618 | goto out; | |
4619 | xs->not_found = ret; | |
4620 | allocation = 1; | |
4621 | goto try_again; | |
4622 | } | |
4623 | ||
4624 | xattr_set: | |
4625 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs); | |
4626 | out: | |
4627 | mlog_exit(ret); | |
4628 | return ret; | |
4629 | } | |
a3944256 TM |
4630 | |
4631 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
4632 | struct ocfs2_xattr_bucket *bucket, | |
4633 | void *para) | |
4634 | { | |
4635 | int ret = 0; | |
3e632946 | 4636 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
4637 | u16 i; |
4638 | struct ocfs2_xattr_entry *xe; | |
4639 | ||
4640 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4641 | xe = &xh->xh_entries[i]; | |
4642 | if (ocfs2_xattr_is_local(xe)) | |
4643 | continue; | |
4644 | ||
4645 | ret = ocfs2_xattr_bucket_value_truncate(inode, | |
4ac6032d | 4646 | bucket->bu_bhs[0], |
a3944256 TM |
4647 | i, 0); |
4648 | if (ret) { | |
4649 | mlog_errno(ret); | |
4650 | break; | |
4651 | } | |
4652 | } | |
4653 | ||
4654 | return ret; | |
4655 | } | |
4656 | ||
4657 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
4658 | struct buffer_head *xb_bh) | |
4659 | { | |
4660 | struct ocfs2_xattr_block *xb = | |
4661 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4662 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
4663 | int ret = 0; | |
4664 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
4665 | u64 p_blkno; | |
4666 | ||
4667 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
4668 | return 0; | |
4669 | ||
4670 | while (name_hash > 0) { | |
4671 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4672 | &e_cpos, &num_clusters, el); | |
4673 | if (ret) { | |
4674 | mlog_errno(ret); | |
4675 | goto out; | |
4676 | } | |
4677 | ||
4678 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
4679 | ocfs2_delete_xattr_in_bucket, | |
4680 | NULL); | |
4681 | if (ret) { | |
4682 | mlog_errno(ret); | |
4683 | goto out; | |
4684 | } | |
4685 | ||
4686 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
4687 | p_blkno, e_cpos, num_clusters); | |
4688 | if (ret) { | |
4689 | mlog_errno(ret); | |
4690 | break; | |
4691 | } | |
4692 | ||
4693 | if (e_cpos == 0) | |
4694 | break; | |
4695 | ||
4696 | name_hash = e_cpos - 1; | |
4697 | } | |
4698 | ||
4699 | out: | |
4700 | return ret; | |
4701 | } | |
99219aea MF |
4702 | |
4703 | /* | |
4704 | * 'trusted' attributes support | |
4705 | */ | |
99219aea MF |
4706 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
4707 | size_t list_size, const char *name, | |
4708 | size_t name_len) | |
4709 | { | |
ceb1eba3 | 4710 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
4711 | const size_t total_len = prefix_len + name_len + 1; |
4712 | ||
4713 | if (list && total_len <= list_size) { | |
4714 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
4715 | memcpy(list + prefix_len, name, name_len); | |
4716 | list[prefix_len + name_len] = '\0'; | |
4717 | } | |
4718 | return total_len; | |
4719 | } | |
4720 | ||
4721 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
4722 | void *buffer, size_t size) | |
4723 | { | |
4724 | if (strcmp(name, "") == 0) | |
4725 | return -EINVAL; | |
4726 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
4727 | buffer, size); | |
4728 | } | |
4729 | ||
4730 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
4731 | const void *value, size_t size, int flags) | |
4732 | { | |
4733 | if (strcmp(name, "") == 0) | |
4734 | return -EINVAL; | |
4735 | ||
4736 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
4737 | size, flags); | |
4738 | } | |
4739 | ||
4740 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
4741 | .prefix = XATTR_TRUSTED_PREFIX, | |
4742 | .list = ocfs2_xattr_trusted_list, | |
4743 | .get = ocfs2_xattr_trusted_get, | |
4744 | .set = ocfs2_xattr_trusted_set, | |
4745 | }; | |
4746 | ||
99219aea MF |
4747 | /* |
4748 | * 'user' attributes support | |
4749 | */ | |
99219aea MF |
4750 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
4751 | size_t list_size, const char *name, | |
4752 | size_t name_len) | |
4753 | { | |
ceb1eba3 | 4754 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
4755 | const size_t total_len = prefix_len + name_len + 1; |
4756 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4757 | ||
4758 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4759 | return 0; | |
4760 | ||
4761 | if (list && total_len <= list_size) { | |
4762 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
4763 | memcpy(list + prefix_len, name, name_len); | |
4764 | list[prefix_len + name_len] = '\0'; | |
4765 | } | |
4766 | return total_len; | |
4767 | } | |
4768 | ||
4769 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
4770 | void *buffer, size_t size) | |
4771 | { | |
4772 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4773 | ||
4774 | if (strcmp(name, "") == 0) | |
4775 | return -EINVAL; | |
4776 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4777 | return -EOPNOTSUPP; | |
4778 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
4779 | buffer, size); | |
4780 | } | |
4781 | ||
4782 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
4783 | const void *value, size_t size, int flags) | |
4784 | { | |
4785 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4786 | ||
4787 | if (strcmp(name, "") == 0) | |
4788 | return -EINVAL; | |
4789 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4790 | return -EOPNOTSUPP; | |
4791 | ||
4792 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
4793 | size, flags); | |
4794 | } | |
4795 | ||
4796 | struct xattr_handler ocfs2_xattr_user_handler = { | |
4797 | .prefix = XATTR_USER_PREFIX, | |
4798 | .list = ocfs2_xattr_user_list, | |
4799 | .get = ocfs2_xattr_user_get, | |
4800 | .set = ocfs2_xattr_user_set, | |
4801 | }; |