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f56654c4 TM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * xattr.c | |
5 | * | |
c3cb6827 | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 7 | * |
cf1d6c76 | 8 | * CREDITS: |
c3cb6827 TY |
9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
cf1d6c76 | 11 | * |
f56654c4 TM |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public | |
c3cb6827 | 14 | * License version 2 as published by the Free Software Foundation. |
f56654c4 TM |
15 | * |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
f56654c4 TM |
20 | */ |
21 | ||
cf1d6c76 TY |
22 | #include <linux/capability.h> |
23 | #include <linux/fs.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/pagemap.h> | |
28 | #include <linux/uio.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/splice.h> | |
31 | #include <linux/mount.h> | |
32 | #include <linux/writeback.h> | |
33 | #include <linux/falloc.h> | |
01225596 | 34 | #include <linux/sort.h> |
99219aea MF |
35 | #include <linux/init.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
923f7f31 | 38 | #include <linux/security.h> |
cf1d6c76 | 39 | |
f56654c4 TM |
40 | #define MLOG_MASK_PREFIX ML_XATTR |
41 | #include <cluster/masklog.h> | |
42 | ||
43 | #include "ocfs2.h" | |
44 | #include "alloc.h" | |
45 | #include "dlmglue.h" | |
46 | #include "file.h" | |
cf1d6c76 TY |
47 | #include "symlink.h" |
48 | #include "sysfile.h" | |
f56654c4 TM |
49 | #include "inode.h" |
50 | #include "journal.h" | |
51 | #include "ocfs2_fs.h" | |
52 | #include "suballoc.h" | |
53 | #include "uptodate.h" | |
54 | #include "buffer_head_io.h" | |
0c044f0b | 55 | #include "super.h" |
cf1d6c76 TY |
56 | #include "xattr.h" |
57 | ||
58 | ||
59 | struct ocfs2_xattr_def_value_root { | |
60 | struct ocfs2_xattr_value_root xv; | |
61 | struct ocfs2_extent_rec er; | |
62 | }; | |
63 | ||
0c044f0b | 64 | struct ocfs2_xattr_bucket { |
ba937127 JB |
65 | /* The inode these xattrs are associated with */ |
66 | struct inode *bu_inode; | |
67 | ||
68 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 69 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
70 | |
71 | /* How many blocks make up one bucket for this filesystem */ | |
72 | int bu_blocks; | |
0c044f0b TM |
73 | }; |
74 | ||
78f30c31 | 75 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 76 | handle_t *handle; |
78f30c31 TM |
77 | struct ocfs2_alloc_context *meta_ac; |
78 | struct ocfs2_alloc_context *data_ac; | |
79 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
80 | }; | |
81 | ||
cf1d6c76 TY |
82 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
83 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
534eaddd TY |
84 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
85 | - sizeof(struct ocfs2_xattr_header) \ | |
86 | - sizeof(__u32)) | |
cf1d6c76 TY |
87 | |
88 | static struct ocfs2_xattr_def_value_root def_xv = { | |
89 | .xv.xr_list.l_count = cpu_to_le16(1), | |
90 | }; | |
91 | ||
92 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
93 | &ocfs2_xattr_user_handler, | |
94 | &ocfs2_xattr_trusted_handler, | |
923f7f31 | 95 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
96 | NULL |
97 | }; | |
98 | ||
c988fd04 | 99 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 TY |
100 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
101 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, | |
923f7f31 | 102 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
103 | }; |
104 | ||
105 | struct ocfs2_xattr_info { | |
106 | int name_index; | |
107 | const char *name; | |
108 | const void *value; | |
109 | size_t value_len; | |
110 | }; | |
111 | ||
112 | struct ocfs2_xattr_search { | |
113 | struct buffer_head *inode_bh; | |
114 | /* | |
115 | * xattr_bh point to the block buffer head which has extended attribute | |
116 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
117 | */ | |
118 | struct buffer_head *xattr_bh; | |
119 | struct ocfs2_xattr_header *header; | |
ba937127 | 120 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
121 | void *base; |
122 | void *end; | |
123 | struct ocfs2_xattr_entry *here; | |
124 | int not_found; | |
125 | }; | |
126 | ||
589dc260 TM |
127 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
128 | struct ocfs2_xattr_header *xh, | |
129 | int index, | |
130 | int *block_off, | |
131 | int *new_offset); | |
132 | ||
54f443f4 JB |
133 | static int ocfs2_xattr_block_find(struct inode *inode, |
134 | int name_index, | |
135 | const char *name, | |
136 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
137 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
138 | struct buffer_head *root_bh, | |
139 | int name_index, | |
140 | const char *name, | |
141 | struct ocfs2_xattr_search *xs); | |
142 | ||
0c044f0b TM |
143 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
144 | struct ocfs2_xattr_tree_root *xt, | |
145 | char *buffer, | |
146 | size_t buffer_size); | |
147 | ||
01225596 | 148 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
149 | struct ocfs2_xattr_search *xs, |
150 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
151 | |
152 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
153 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
154 | struct ocfs2_xattr_search *xs, |
155 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 156 | |
a3944256 TM |
157 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
158 | struct buffer_head *xb_bh); | |
159 | ||
0030e001 TY |
160 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
161 | { | |
162 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
163 | } | |
164 | ||
165 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
166 | { | |
167 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
168 | } | |
169 | ||
170 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
171 | { | |
172 | u16 len = sb->s_blocksize - | |
173 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
174 | ||
175 | return len / sizeof(struct ocfs2_xattr_entry); | |
176 | } | |
177 | ||
9c7759aa | 178 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 179 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 180 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 181 | |
ba937127 | 182 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 183 | { |
ba937127 JB |
184 | struct ocfs2_xattr_bucket *bucket; |
185 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 186 | |
ba937127 JB |
187 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
188 | ||
189 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
190 | if (bucket) { | |
191 | bucket->bu_inode = inode; | |
192 | bucket->bu_blocks = blks; | |
193 | } | |
194 | ||
195 | return bucket; | |
196 | } | |
197 | ||
198 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
199 | { | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
203 | brelse(bucket->bu_bhs[i]); |
204 | bucket->bu_bhs[i] = NULL; | |
205 | } | |
206 | } | |
207 | ||
ba937127 JB |
208 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
209 | { | |
210 | if (bucket) { | |
211 | ocfs2_xattr_bucket_relse(bucket); | |
212 | bucket->bu_inode = NULL; | |
213 | kfree(bucket); | |
214 | } | |
215 | } | |
216 | ||
784b816a JB |
217 | /* |
218 | * A bucket that has never been written to disk doesn't need to be | |
219 | * read. We just need the buffer_heads. Don't call this for | |
220 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
221 | * them fully. | |
222 | */ | |
ba937127 | 223 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
224 | u64 xb_blkno) |
225 | { | |
226 | int i, rc = 0; | |
784b816a | 227 | |
ba937127 JB |
228 | for (i = 0; i < bucket->bu_blocks; i++) { |
229 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
230 | xb_blkno + i); | |
784b816a JB |
231 | if (!bucket->bu_bhs[i]) { |
232 | rc = -EIO; | |
233 | mlog_errno(rc); | |
234 | break; | |
235 | } | |
236 | ||
757055ad TM |
237 | if (!ocfs2_buffer_uptodate(bucket->bu_inode, |
238 | bucket->bu_bhs[i])) | |
239 | ocfs2_set_new_buffer_uptodate(bucket->bu_inode, | |
240 | bucket->bu_bhs[i]); | |
784b816a JB |
241 | } |
242 | ||
243 | if (rc) | |
ba937127 | 244 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
245 | return rc; |
246 | } | |
247 | ||
248 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 249 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
250 | u64 xb_blkno) |
251 | { | |
ba937127 | 252 | int rc; |
784b816a | 253 | |
ba937127 JB |
254 | rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno, |
255 | bucket->bu_blocks, bucket->bu_bhs, 0); | |
784b816a | 256 | if (rc) |
ba937127 | 257 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
258 | return rc; |
259 | } | |
260 | ||
1224be02 | 261 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
262 | struct ocfs2_xattr_bucket *bucket, |
263 | int type) | |
264 | { | |
265 | int i, rc = 0; | |
1224be02 | 266 | |
ba937127 JB |
267 | for (i = 0; i < bucket->bu_blocks; i++) { |
268 | rc = ocfs2_journal_access(handle, bucket->bu_inode, | |
1224be02 JB |
269 | bucket->bu_bhs[i], type); |
270 | if (rc) { | |
271 | mlog_errno(rc); | |
272 | break; | |
273 | } | |
274 | } | |
275 | ||
276 | return rc; | |
277 | } | |
278 | ||
279 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
280 | struct ocfs2_xattr_bucket *bucket) |
281 | { | |
ba937127 | 282 | int i; |
1224be02 | 283 | |
ba937127 | 284 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
285 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
286 | } | |
287 | ||
ba937127 | 288 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
289 | struct ocfs2_xattr_bucket *src) |
290 | { | |
291 | int i; | |
ba937127 JB |
292 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
293 | ||
294 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
295 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 296 | |
ba937127 | 297 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
298 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
299 | blocksize); | |
300 | } | |
301 | } | |
1224be02 | 302 | |
936b8834 | 303 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
304 | { |
305 | struct xattr_handler *handler = NULL; | |
306 | ||
307 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
308 | handler = ocfs2_xattr_handler_map[name_index]; | |
309 | ||
936b8834 | 310 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
311 | } |
312 | ||
40daa16a | 313 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 314 | const char *name, |
40daa16a | 315 | int name_len) |
cf1d6c76 TY |
316 | { |
317 | /* Get hash value of uuid from super block */ | |
318 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
319 | int i; | |
320 | ||
cf1d6c76 TY |
321 | /* hash extended attribute name */ |
322 | for (i = 0; i < name_len; i++) { | |
323 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
324 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
325 | *name++; | |
326 | } | |
327 | ||
328 | return hash; | |
329 | } | |
330 | ||
331 | /* | |
332 | * ocfs2_xattr_hash_entry() | |
333 | * | |
334 | * Compute the hash of an extended attribute. | |
335 | */ | |
336 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
337 | struct ocfs2_xattr_header *header, | |
338 | struct ocfs2_xattr_entry *entry) | |
339 | { | |
340 | u32 hash = 0; | |
cf1d6c76 | 341 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 342 | |
2057e5c6 | 343 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
344 | entry->xe_name_hash = cpu_to_le32(hash); |
345 | ||
346 | return; | |
347 | } | |
f56654c4 | 348 | |
534eaddd TY |
349 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
350 | { | |
351 | int size = 0; | |
352 | ||
353 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
354 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
355 | else | |
356 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
357 | size += sizeof(struct ocfs2_xattr_entry); | |
358 | ||
359 | return size; | |
360 | } | |
361 | ||
362 | int ocfs2_calc_security_init(struct inode *dir, | |
363 | struct ocfs2_security_xattr_info *si, | |
364 | int *want_clusters, | |
365 | int *xattr_credits, | |
366 | struct ocfs2_alloc_context **xattr_ac) | |
367 | { | |
368 | int ret = 0; | |
369 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
370 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
371 | si->value_len); | |
372 | ||
373 | /* | |
374 | * The max space of security xattr taken inline is | |
375 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
376 | * So reserve one metadata block for it is ok. | |
377 | */ | |
378 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
379 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
380 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
381 | if (ret) { | |
382 | mlog_errno(ret); | |
383 | return ret; | |
384 | } | |
385 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
386 | } | |
387 | ||
388 | /* reserve clusters for xattr value which will be set in B tree*/ | |
389 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) | |
390 | *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, | |
391 | si->value_len); | |
392 | return ret; | |
393 | } | |
394 | ||
f56654c4 TM |
395 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
396 | u32 clusters_to_add, | |
397 | struct buffer_head *xattr_bh, | |
78f30c31 TM |
398 | struct ocfs2_xattr_value_root *xv, |
399 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
400 | { |
401 | int status = 0; | |
85db90e7 | 402 | handle_t *handle = ctxt->handle; |
f56654c4 TM |
403 | enum ocfs2_alloc_restarted why; |
404 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 | 405 | u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); |
f99b9b7c | 406 | struct ocfs2_extent_tree et; |
f56654c4 TM |
407 | |
408 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
409 | ||
8d6220d6 | 410 | ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
f99b9b7c | 411 | |
f56654c4 TM |
412 | status = ocfs2_journal_access(handle, inode, xattr_bh, |
413 | OCFS2_JOURNAL_ACCESS_WRITE); | |
414 | if (status < 0) { | |
415 | mlog_errno(status); | |
416 | goto leave; | |
417 | } | |
418 | ||
419 | prev_clusters = le32_to_cpu(xv->xr_clusters); | |
420 | status = ocfs2_add_clusters_in_btree(osb, | |
421 | inode, | |
422 | &logical_start, | |
423 | clusters_to_add, | |
424 | 0, | |
f99b9b7c | 425 | &et, |
f56654c4 | 426 | handle, |
78f30c31 TM |
427 | ctxt->data_ac, |
428 | ctxt->meta_ac, | |
f99b9b7c | 429 | &why); |
85db90e7 TM |
430 | if (status < 0) { |
431 | mlog_errno(status); | |
f56654c4 TM |
432 | goto leave; |
433 | } | |
434 | ||
435 | status = ocfs2_journal_dirty(handle, xattr_bh); | |
436 | if (status < 0) { | |
437 | mlog_errno(status); | |
438 | goto leave; | |
439 | } | |
440 | ||
441 | clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; | |
442 | ||
85db90e7 TM |
443 | /* |
444 | * We should have already allocated enough space before the transaction, | |
445 | * so no need to restart. | |
446 | */ | |
447 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
448 | |
449 | leave: | |
f56654c4 TM |
450 | |
451 | return status; | |
452 | } | |
453 | ||
454 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
455 | struct buffer_head *root_bh, | |
456 | struct ocfs2_xattr_value_root *xv, | |
457 | u32 cpos, u32 phys_cpos, u32 len, | |
78f30c31 | 458 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
459 | { |
460 | int ret; | |
461 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 462 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
463 | struct ocfs2_extent_tree et; |
464 | ||
8d6220d6 | 465 | ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
f56654c4 | 466 | |
f56654c4 TM |
467 | ret = ocfs2_journal_access(handle, inode, root_bh, |
468 | OCFS2_JOURNAL_ACCESS_WRITE); | |
469 | if (ret) { | |
470 | mlog_errno(ret); | |
85db90e7 | 471 | goto out; |
f56654c4 TM |
472 | } |
473 | ||
78f30c31 TM |
474 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, |
475 | &ctxt->dealloc); | |
f56654c4 TM |
476 | if (ret) { |
477 | mlog_errno(ret); | |
85db90e7 | 478 | goto out; |
f56654c4 TM |
479 | } |
480 | ||
481 | le32_add_cpu(&xv->xr_clusters, -len); | |
482 | ||
483 | ret = ocfs2_journal_dirty(handle, root_bh); | |
484 | if (ret) { | |
485 | mlog_errno(ret); | |
85db90e7 | 486 | goto out; |
f56654c4 TM |
487 | } |
488 | ||
78f30c31 | 489 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); |
f56654c4 TM |
490 | if (ret) |
491 | mlog_errno(ret); | |
492 | ||
f56654c4 | 493 | out: |
f56654c4 TM |
494 | return ret; |
495 | } | |
496 | ||
497 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
498 | u32 old_clusters, | |
499 | u32 new_clusters, | |
500 | struct buffer_head *root_bh, | |
78f30c31 TM |
501 | struct ocfs2_xattr_value_root *xv, |
502 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
503 | { |
504 | int ret = 0; | |
505 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
506 | u64 block; | |
f56654c4 TM |
507 | |
508 | if (old_clusters <= new_clusters) | |
509 | return 0; | |
510 | ||
511 | cpos = new_clusters; | |
512 | trunc_len = old_clusters - new_clusters; | |
513 | while (trunc_len) { | |
514 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
515 | &alloc_size, &xv->xr_list); | |
516 | if (ret) { | |
517 | mlog_errno(ret); | |
518 | goto out; | |
519 | } | |
520 | ||
521 | if (alloc_size > trunc_len) | |
522 | alloc_size = trunc_len; | |
523 | ||
524 | ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, | |
525 | phys_cpos, alloc_size, | |
78f30c31 | 526 | ctxt); |
f56654c4 TM |
527 | if (ret) { |
528 | mlog_errno(ret); | |
529 | goto out; | |
530 | } | |
531 | ||
532 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
533 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
534 | alloc_size); | |
535 | cpos += alloc_size; | |
536 | trunc_len -= alloc_size; | |
537 | } | |
538 | ||
539 | out: | |
f56654c4 TM |
540 | return ret; |
541 | } | |
542 | ||
543 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
544 | struct buffer_head *root_bh, | |
545 | struct ocfs2_xattr_value_root *xv, | |
78f30c31 TM |
546 | int len, |
547 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
548 | { |
549 | int ret; | |
550 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
551 | u32 old_clusters = le32_to_cpu(xv->xr_clusters); | |
552 | ||
553 | if (new_clusters == old_clusters) | |
554 | return 0; | |
555 | ||
556 | if (new_clusters > old_clusters) | |
557 | ret = ocfs2_xattr_extend_allocation(inode, | |
558 | new_clusters - old_clusters, | |
78f30c31 | 559 | root_bh, xv, ctxt); |
f56654c4 TM |
560 | else |
561 | ret = ocfs2_xattr_shrink_size(inode, | |
562 | old_clusters, new_clusters, | |
78f30c31 | 563 | root_bh, xv, ctxt); |
f56654c4 TM |
564 | |
565 | return ret; | |
566 | } | |
cf1d6c76 | 567 | |
936b8834 TM |
568 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
569 | size_t *result, const char *prefix, | |
570 | const char *name, int name_len) | |
571 | { | |
572 | char *p = buffer + *result; | |
573 | int prefix_len = strlen(prefix); | |
574 | int total_len = prefix_len + name_len + 1; | |
575 | ||
576 | *result += total_len; | |
577 | ||
578 | /* we are just looking for how big our buffer needs to be */ | |
579 | if (!size) | |
580 | return 0; | |
581 | ||
582 | if (*result > size) | |
583 | return -ERANGE; | |
584 | ||
585 | memcpy(p, prefix, prefix_len); | |
586 | memcpy(p + prefix_len, name, name_len); | |
587 | p[prefix_len + name_len] = '\0'; | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
cf1d6c76 TY |
592 | static int ocfs2_xattr_list_entries(struct inode *inode, |
593 | struct ocfs2_xattr_header *header, | |
594 | char *buffer, size_t buffer_size) | |
595 | { | |
936b8834 TM |
596 | size_t result = 0; |
597 | int i, type, ret; | |
598 | const char *prefix, *name; | |
cf1d6c76 TY |
599 | |
600 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
601 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
602 | type = ocfs2_xattr_get_type(entry); |
603 | prefix = ocfs2_xattr_prefix(type); | |
604 | ||
605 | if (prefix) { | |
606 | name = (const char *)header + | |
607 | le16_to_cpu(entry->xe_name_offset); | |
608 | ||
609 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
610 | &result, prefix, name, | |
611 | entry->xe_name_len); | |
612 | if (ret) | |
613 | return ret; | |
cf1d6c76 TY |
614 | } |
615 | } | |
616 | ||
936b8834 | 617 | return result; |
cf1d6c76 TY |
618 | } |
619 | ||
620 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
621 | struct ocfs2_dinode *di, | |
622 | char *buffer, | |
623 | size_t buffer_size) | |
624 | { | |
625 | struct ocfs2_xattr_header *header = NULL; | |
626 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
627 | int ret = 0; | |
628 | ||
629 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
630 | return ret; | |
631 | ||
632 | header = (struct ocfs2_xattr_header *) | |
633 | ((void *)di + inode->i_sb->s_blocksize - | |
634 | le16_to_cpu(di->i_xattr_inline_size)); | |
635 | ||
636 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
637 | ||
638 | return ret; | |
639 | } | |
640 | ||
641 | static int ocfs2_xattr_block_list(struct inode *inode, | |
642 | struct ocfs2_dinode *di, | |
643 | char *buffer, | |
644 | size_t buffer_size) | |
645 | { | |
646 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 647 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
648 | int ret = 0; |
649 | ||
650 | if (!di->i_xattr_loc) | |
651 | return ret; | |
652 | ||
0fcaa56a | 653 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
654 | if (ret < 0) { |
655 | mlog_errno(ret); | |
656 | return ret; | |
657 | } | |
cf1d6c76 | 658 | |
0c044f0b | 659 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
f6087fb7 JB |
660 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
661 | ret = -EIO; | |
662 | goto cleanup; | |
663 | } | |
cf1d6c76 | 664 | |
0c044f0b TM |
665 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
666 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
667 | ret = ocfs2_xattr_list_entries(inode, header, | |
668 | buffer, buffer_size); | |
669 | } else { | |
670 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
671 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
672 | buffer, buffer_size); | |
673 | } | |
cf1d6c76 TY |
674 | cleanup: |
675 | brelse(blk_bh); | |
676 | ||
677 | return ret; | |
678 | } | |
679 | ||
680 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
681 | char *buffer, | |
682 | size_t size) | |
683 | { | |
684 | int ret = 0, i_ret = 0, b_ret = 0; | |
685 | struct buffer_head *di_bh = NULL; | |
686 | struct ocfs2_dinode *di = NULL; | |
687 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
688 | ||
8154da3d TY |
689 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
690 | return -EOPNOTSUPP; | |
691 | ||
cf1d6c76 TY |
692 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
693 | return ret; | |
694 | ||
695 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
696 | if (ret < 0) { | |
697 | mlog_errno(ret); | |
698 | return ret; | |
699 | } | |
700 | ||
701 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
702 | ||
703 | down_read(&oi->ip_xattr_sem); | |
704 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
705 | if (i_ret < 0) | |
706 | b_ret = 0; | |
707 | else { | |
708 | if (buffer) { | |
709 | buffer += i_ret; | |
710 | size -= i_ret; | |
711 | } | |
712 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
713 | buffer, size); | |
714 | if (b_ret < 0) | |
715 | i_ret = 0; | |
716 | } | |
717 | up_read(&oi->ip_xattr_sem); | |
718 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
719 | ||
720 | brelse(di_bh); | |
721 | ||
722 | return i_ret + b_ret; | |
723 | } | |
724 | ||
725 | static int ocfs2_xattr_find_entry(int name_index, | |
726 | const char *name, | |
727 | struct ocfs2_xattr_search *xs) | |
728 | { | |
729 | struct ocfs2_xattr_entry *entry; | |
730 | size_t name_len; | |
731 | int i, cmp = 1; | |
732 | ||
733 | if (name == NULL) | |
734 | return -EINVAL; | |
735 | ||
736 | name_len = strlen(name); | |
737 | entry = xs->here; | |
738 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
739 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
740 | if (!cmp) | |
741 | cmp = name_len - entry->xe_name_len; | |
742 | if (!cmp) | |
743 | cmp = memcmp(name, (xs->base + | |
744 | le16_to_cpu(entry->xe_name_offset)), | |
745 | name_len); | |
746 | if (cmp == 0) | |
747 | break; | |
748 | entry += 1; | |
749 | } | |
750 | xs->here = entry; | |
751 | ||
752 | return cmp ? -ENODATA : 0; | |
753 | } | |
754 | ||
755 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 756 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
757 | void *buffer, |
758 | size_t len) | |
759 | { | |
760 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
761 | u64 blkno; | |
762 | int i, ret = 0; | |
763 | size_t cplen, blocksize; | |
764 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
765 | struct ocfs2_extent_list *el; |
766 | ||
cf1d6c76 TY |
767 | el = &xv->xr_list; |
768 | clusters = le32_to_cpu(xv->xr_clusters); | |
769 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
770 | blocksize = inode->i_sb->s_blocksize; | |
771 | ||
772 | cpos = 0; | |
773 | while (cpos < clusters) { | |
774 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
775 | &num_clusters, el); | |
776 | if (ret) { | |
777 | mlog_errno(ret); | |
778 | goto out; | |
779 | } | |
780 | ||
781 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
782 | /* Copy ocfs2_xattr_value */ | |
783 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 784 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
785 | if (ret) { |
786 | mlog_errno(ret); | |
787 | goto out; | |
788 | } | |
789 | ||
790 | cplen = len >= blocksize ? blocksize : len; | |
791 | memcpy(buffer, bh->b_data, cplen); | |
792 | len -= cplen; | |
793 | buffer += cplen; | |
794 | ||
795 | brelse(bh); | |
796 | bh = NULL; | |
797 | if (len == 0) | |
798 | break; | |
799 | } | |
800 | cpos += num_clusters; | |
801 | } | |
802 | out: | |
803 | return ret; | |
804 | } | |
805 | ||
806 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
807 | int name_index, | |
808 | const char *name, | |
809 | void *buffer, | |
810 | size_t buffer_size, | |
811 | struct ocfs2_xattr_search *xs) | |
812 | { | |
813 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
814 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 815 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
816 | size_t size; |
817 | int ret = 0; | |
818 | ||
819 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
820 | return -ENODATA; | |
821 | ||
822 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
823 | xs->header = (struct ocfs2_xattr_header *) | |
824 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
825 | xs->base = (void *)xs->header; | |
826 | xs->here = xs->header->xh_entries; | |
827 | ||
828 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
829 | if (ret) | |
830 | return ret; | |
831 | size = le64_to_cpu(xs->here->xe_value_size); | |
832 | if (buffer) { | |
833 | if (size > buffer_size) | |
834 | return -ERANGE; | |
835 | if (ocfs2_xattr_is_local(xs->here)) { | |
836 | memcpy(buffer, (void *)xs->base + | |
837 | le16_to_cpu(xs->here->xe_name_offset) + | |
838 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
839 | } else { | |
589dc260 TM |
840 | xv = (struct ocfs2_xattr_value_root *) |
841 | (xs->base + le16_to_cpu( | |
842 | xs->here->xe_name_offset) + | |
843 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
844 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
845 | buffer, size); |
846 | if (ret < 0) { | |
847 | mlog_errno(ret); | |
848 | return ret; | |
849 | } | |
850 | } | |
851 | } | |
852 | ||
853 | return size; | |
854 | } | |
855 | ||
856 | static int ocfs2_xattr_block_get(struct inode *inode, | |
857 | int name_index, | |
858 | const char *name, | |
859 | void *buffer, | |
860 | size_t buffer_size, | |
861 | struct ocfs2_xattr_search *xs) | |
862 | { | |
cf1d6c76 | 863 | struct ocfs2_xattr_block *xb; |
589dc260 | 864 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 865 | size_t size; |
589dc260 | 866 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 | 867 | |
ba937127 JB |
868 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
869 | if (!xs->bucket) { | |
870 | ret = -ENOMEM; | |
871 | mlog_errno(ret); | |
872 | goto cleanup; | |
873 | } | |
589dc260 | 874 | |
54f443f4 JB |
875 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
876 | if (ret) { | |
cf1d6c76 | 877 | mlog_errno(ret); |
cf1d6c76 TY |
878 | goto cleanup; |
879 | } | |
880 | ||
6c1e183e TY |
881 | if (xs->not_found) { |
882 | ret = -ENODATA; | |
883 | goto cleanup; | |
884 | } | |
885 | ||
54f443f4 | 886 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
887 | size = le64_to_cpu(xs->here->xe_value_size); |
888 | if (buffer) { | |
889 | ret = -ERANGE; | |
890 | if (size > buffer_size) | |
891 | goto cleanup; | |
589dc260 TM |
892 | |
893 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
894 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
895 | i = xs->here - xs->header->xh_entries; | |
896 | ||
897 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
898 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 899 | bucket_xh(xs->bucket), |
589dc260 TM |
900 | i, |
901 | &block_off, | |
902 | &name_offset); | |
ba937127 | 903 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 904 | } |
cf1d6c76 TY |
905 | if (ocfs2_xattr_is_local(xs->here)) { |
906 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 907 | name_offset + name_len, size); |
cf1d6c76 | 908 | } else { |
589dc260 TM |
909 | xv = (struct ocfs2_xattr_value_root *) |
910 | (xs->base + name_offset + name_len); | |
911 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
912 | buffer, size); |
913 | if (ret < 0) { | |
914 | mlog_errno(ret); | |
915 | goto cleanup; | |
916 | } | |
917 | } | |
918 | } | |
919 | ret = size; | |
920 | cleanup: | |
ba937127 | 921 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 922 | |
54f443f4 JB |
923 | brelse(xs->xattr_bh); |
924 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
925 | return ret; |
926 | } | |
927 | ||
928 | /* ocfs2_xattr_get() | |
929 | * | |
930 | * Copy an extended attribute into the buffer provided. | |
931 | * Buffer is NULL to compute the size of buffer required. | |
932 | */ | |
0030e001 TY |
933 | static int ocfs2_xattr_get(struct inode *inode, |
934 | int name_index, | |
935 | const char *name, | |
936 | void *buffer, | |
937 | size_t buffer_size) | |
cf1d6c76 TY |
938 | { |
939 | int ret; | |
940 | struct ocfs2_dinode *di = NULL; | |
941 | struct buffer_head *di_bh = NULL; | |
942 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
943 | struct ocfs2_xattr_search xis = { | |
944 | .not_found = -ENODATA, | |
945 | }; | |
946 | struct ocfs2_xattr_search xbs = { | |
947 | .not_found = -ENODATA, | |
948 | }; | |
949 | ||
8154da3d TY |
950 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
951 | return -EOPNOTSUPP; | |
952 | ||
cf1d6c76 TY |
953 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
954 | ret = -ENODATA; | |
955 | ||
956 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
957 | if (ret < 0) { | |
958 | mlog_errno(ret); | |
959 | return ret; | |
960 | } | |
961 | xis.inode_bh = xbs.inode_bh = di_bh; | |
962 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
963 | ||
964 | down_read(&oi->ip_xattr_sem); | |
965 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
966 | buffer_size, &xis); | |
6c1e183e | 967 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
968 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
969 | buffer_size, &xbs); | |
970 | up_read(&oi->ip_xattr_sem); | |
971 | ocfs2_inode_unlock(inode, 0); | |
972 | ||
973 | brelse(di_bh); | |
974 | ||
975 | return ret; | |
976 | } | |
977 | ||
978 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 979 | handle_t *handle, |
cf1d6c76 TY |
980 | struct ocfs2_xattr_value_root *xv, |
981 | const void *value, | |
982 | int value_len) | |
983 | { | |
984 | int ret = 0, i, cp_len, credits; | |
985 | u16 blocksize = inode->i_sb->s_blocksize; | |
986 | u32 p_cluster, num_clusters; | |
987 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
988 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
989 | u64 blkno; | |
990 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
991 | |
992 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
993 | ||
85db90e7 TM |
994 | /* |
995 | * In __ocfs2_xattr_set_value_outside has already been dirtied, | |
996 | * so we don't need to worry about whether ocfs2_extend_trans | |
997 | * will create a new transactio for us or not. | |
998 | */ | |
cf1d6c76 | 999 | credits = clusters * bpc; |
85db90e7 TM |
1000 | ret = ocfs2_extend_trans(handle, credits); |
1001 | if (ret) { | |
cf1d6c76 TY |
1002 | mlog_errno(ret); |
1003 | goto out; | |
1004 | } | |
1005 | ||
1006 | while (cpos < clusters) { | |
1007 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1008 | &num_clusters, &xv->xr_list); | |
1009 | if (ret) { | |
1010 | mlog_errno(ret); | |
85db90e7 | 1011 | goto out; |
cf1d6c76 TY |
1012 | } |
1013 | ||
1014 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1015 | ||
1016 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 1017 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
1018 | if (ret) { |
1019 | mlog_errno(ret); | |
85db90e7 | 1020 | goto out; |
cf1d6c76 TY |
1021 | } |
1022 | ||
1023 | ret = ocfs2_journal_access(handle, | |
1024 | inode, | |
1025 | bh, | |
1026 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1027 | if (ret < 0) { | |
1028 | mlog_errno(ret); | |
85db90e7 | 1029 | goto out; |
cf1d6c76 TY |
1030 | } |
1031 | ||
1032 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1033 | memcpy(bh->b_data, value, cp_len); | |
1034 | value_len -= cp_len; | |
1035 | value += cp_len; | |
1036 | if (cp_len < blocksize) | |
1037 | memset(bh->b_data + cp_len, 0, | |
1038 | blocksize - cp_len); | |
1039 | ||
1040 | ret = ocfs2_journal_dirty(handle, bh); | |
1041 | if (ret < 0) { | |
1042 | mlog_errno(ret); | |
85db90e7 | 1043 | goto out; |
cf1d6c76 TY |
1044 | } |
1045 | brelse(bh); | |
1046 | bh = NULL; | |
1047 | ||
1048 | /* | |
1049 | * XXX: do we need to empty all the following | |
1050 | * blocks in this cluster? | |
1051 | */ | |
1052 | if (!value_len) | |
1053 | break; | |
1054 | } | |
1055 | cpos += num_clusters; | |
1056 | } | |
cf1d6c76 TY |
1057 | out: |
1058 | brelse(bh); | |
1059 | ||
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1064 | handle_t *handle, |
cf1d6c76 TY |
1065 | struct ocfs2_xattr_info *xi, |
1066 | struct ocfs2_xattr_search *xs, | |
1067 | size_t offs) | |
1068 | { | |
cf1d6c76 TY |
1069 | int ret = 0; |
1070 | size_t name_len = strlen(xi->name); | |
1071 | void *val = xs->base + offs; | |
1072 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1073 | ||
cf1d6c76 TY |
1074 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
1075 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1076 | if (ret) { | |
1077 | mlog_errno(ret); | |
85db90e7 | 1078 | goto out; |
cf1d6c76 TY |
1079 | } |
1080 | /* Decrease xattr count */ | |
1081 | le16_add_cpu(&xs->header->xh_count, -1); | |
1082 | /* Remove the xattr entry and tree root which has already be set*/ | |
1083 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1084 | memset(val, 0, size); | |
1085 | ||
1086 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1087 | if (ret < 0) | |
1088 | mlog_errno(ret); | |
cf1d6c76 TY |
1089 | out: |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1094 | handle_t *handle, |
cf1d6c76 TY |
1095 | struct ocfs2_xattr_info *xi, |
1096 | struct ocfs2_xattr_search *xs, | |
1097 | size_t offs) | |
1098 | { | |
85db90e7 | 1099 | int ret; |
cf1d6c76 | 1100 | |
cf1d6c76 TY |
1101 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
1102 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1103 | if (ret) { | |
1104 | mlog_errno(ret); | |
85db90e7 | 1105 | goto out; |
cf1d6c76 TY |
1106 | } |
1107 | ||
1108 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1109 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1110 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1111 | ocfs2_xattr_set_local(xs->here, 1); | |
1112 | else | |
1113 | ocfs2_xattr_set_local(xs->here, 0); | |
1114 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1115 | ||
1116 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1117 | if (ret < 0) | |
1118 | mlog_errno(ret); | |
cf1d6c76 TY |
1119 | out: |
1120 | return ret; | |
1121 | } | |
1122 | ||
1123 | /* | |
1124 | * ocfs2_xattr_set_value_outside() | |
1125 | * | |
1126 | * Set large size value in B tree. | |
1127 | */ | |
1128 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1129 | struct ocfs2_xattr_info *xi, | |
1130 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1131 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1132 | size_t offs) |
1133 | { | |
1134 | size_t name_len = strlen(xi->name); | |
1135 | void *val = xs->base + offs; | |
1136 | struct ocfs2_xattr_value_root *xv = NULL; | |
1137 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1138 | int ret = 0; | |
1139 | ||
1140 | memset(val, 0, size); | |
1141 | memcpy(val, xi->name, name_len); | |
1142 | xv = (struct ocfs2_xattr_value_root *) | |
1143 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1144 | xv->xr_clusters = 0; | |
1145 | xv->xr_last_eb_blk = 0; | |
1146 | xv->xr_list.l_tree_depth = 0; | |
1147 | xv->xr_list.l_count = cpu_to_le16(1); | |
1148 | xv->xr_list.l_next_free_rec = 0; | |
1149 | ||
1150 | ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
78f30c31 | 1151 | xi->value_len, ctxt); |
cf1d6c76 TY |
1152 | if (ret < 0) { |
1153 | mlog_errno(ret); | |
1154 | return ret; | |
1155 | } | |
85db90e7 | 1156 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, offs); |
cf1d6c76 TY |
1157 | if (ret < 0) { |
1158 | mlog_errno(ret); | |
1159 | return ret; | |
1160 | } | |
85db90e7 TM |
1161 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, xv, |
1162 | xi->value, xi->value_len); | |
cf1d6c76 TY |
1163 | if (ret < 0) |
1164 | mlog_errno(ret); | |
1165 | ||
1166 | return ret; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * ocfs2_xattr_set_entry_local() | |
1171 | * | |
1172 | * Set, replace or remove extended attribute in local. | |
1173 | */ | |
1174 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1175 | struct ocfs2_xattr_info *xi, | |
1176 | struct ocfs2_xattr_search *xs, | |
1177 | struct ocfs2_xattr_entry *last, | |
1178 | size_t min_offs) | |
1179 | { | |
1180 | size_t name_len = strlen(xi->name); | |
1181 | int i; | |
1182 | ||
1183 | if (xi->value && xs->not_found) { | |
1184 | /* Insert the new xattr entry. */ | |
1185 | le16_add_cpu(&xs->header->xh_count, 1); | |
1186 | ocfs2_xattr_set_type(last, xi->name_index); | |
1187 | ocfs2_xattr_set_local(last, 1); | |
1188 | last->xe_name_len = name_len; | |
1189 | } else { | |
1190 | void *first_val; | |
1191 | void *val; | |
1192 | size_t offs, size; | |
1193 | ||
1194 | first_val = xs->base + min_offs; | |
1195 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1196 | val = xs->base + offs; | |
1197 | ||
1198 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1199 | OCFS2_XATTR_INLINE_SIZE) | |
1200 | size = OCFS2_XATTR_SIZE(name_len) + | |
1201 | OCFS2_XATTR_ROOT_SIZE; | |
1202 | else | |
1203 | size = OCFS2_XATTR_SIZE(name_len) + | |
1204 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1205 | ||
1206 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1207 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1208 | /* The old and the new value have the | |
1209 | same size. Just replace the value. */ | |
1210 | ocfs2_xattr_set_local(xs->here, 1); | |
1211 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1212 | /* Clear value bytes. */ | |
1213 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1214 | 0, | |
1215 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1216 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1217 | xi->value, | |
1218 | xi->value_len); | |
1219 | return; | |
1220 | } | |
1221 | /* Remove the old name+value. */ | |
1222 | memmove(first_val + size, first_val, val - first_val); | |
1223 | memset(first_val, 0, size); | |
1224 | xs->here->xe_name_hash = 0; | |
1225 | xs->here->xe_name_offset = 0; | |
1226 | ocfs2_xattr_set_local(xs->here, 1); | |
1227 | xs->here->xe_value_size = 0; | |
1228 | ||
1229 | min_offs += size; | |
1230 | ||
1231 | /* Adjust all value offsets. */ | |
1232 | last = xs->header->xh_entries; | |
1233 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1234 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1235 | ||
1236 | if (o < offs) | |
1237 | last->xe_name_offset = cpu_to_le16(o + size); | |
1238 | last += 1; | |
1239 | } | |
1240 | ||
1241 | if (!xi->value) { | |
1242 | /* Remove the old entry. */ | |
1243 | last -= 1; | |
1244 | memmove(xs->here, xs->here + 1, | |
1245 | (void *)last - (void *)xs->here); | |
1246 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1247 | le16_add_cpu(&xs->header->xh_count, -1); | |
1248 | } | |
1249 | } | |
1250 | if (xi->value) { | |
1251 | /* Insert the new name+value. */ | |
1252 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1253 | OCFS2_XATTR_SIZE(xi->value_len); | |
1254 | void *val = xs->base + min_offs - size; | |
1255 | ||
1256 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1257 | memset(val, 0, size); | |
1258 | memcpy(val, xi->name, name_len); | |
1259 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1260 | xi->value, | |
1261 | xi->value_len); | |
1262 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1263 | ocfs2_xattr_set_local(xs->here, 1); | |
1264 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1265 | } | |
1266 | ||
1267 | return; | |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * ocfs2_xattr_set_entry() | |
1272 | * | |
1273 | * Set extended attribute entry into inode or block. | |
1274 | * | |
1275 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1276 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1277 | * then set value in B tree with set_value_outside(). | |
1278 | */ | |
1279 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1280 | struct ocfs2_xattr_info *xi, | |
1281 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1282 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1283 | int flag) |
1284 | { | |
1285 | struct ocfs2_xattr_entry *last; | |
1286 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1287 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1288 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1289 | size_t size_l = 0; | |
85db90e7 | 1290 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1291 | int free, i, ret; |
1292 | struct ocfs2_xattr_info xi_l = { | |
1293 | .name_index = xi->name_index, | |
1294 | .name = xi->name, | |
1295 | .value = xi->value, | |
1296 | .value_len = xi->value_len, | |
1297 | }; | |
1298 | ||
1299 | /* Compute min_offs, last and free space. */ | |
1300 | last = xs->header->xh_entries; | |
1301 | ||
1302 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1303 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1304 | if (offs < min_offs) | |
1305 | min_offs = offs; | |
1306 | last += 1; | |
1307 | } | |
1308 | ||
1309 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1310 | if (free < 0) | |
b37c4d84 | 1311 | return -EIO; |
cf1d6c76 TY |
1312 | |
1313 | if (!xs->not_found) { | |
1314 | size_t size = 0; | |
1315 | if (ocfs2_xattr_is_local(xs->here)) | |
1316 | size = OCFS2_XATTR_SIZE(name_len) + | |
1317 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1318 | else | |
1319 | size = OCFS2_XATTR_SIZE(name_len) + | |
1320 | OCFS2_XATTR_ROOT_SIZE; | |
1321 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1322 | } | |
1323 | /* Check free space in inode or block */ | |
1324 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1325 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1326 | OCFS2_XATTR_SIZE(name_len) + | |
1327 | OCFS2_XATTR_ROOT_SIZE) { | |
1328 | ret = -ENOSPC; | |
1329 | goto out; | |
1330 | } | |
1331 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1332 | xi_l.value = (void *)&def_xv; | |
1333 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1334 | } else if (xi->value) { | |
1335 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1336 | OCFS2_XATTR_SIZE(name_len) + | |
1337 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1338 | ret = -ENOSPC; | |
1339 | goto out; | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | if (!xs->not_found) { | |
1344 | /* For existing extended attribute */ | |
1345 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1346 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1347 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1348 | void *val = xs->base + offs; | |
1349 | ||
1350 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1351 | /* Replace existing local xattr with tree root */ | |
1352 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
78f30c31 | 1353 | ctxt, offs); |
cf1d6c76 TY |
1354 | if (ret < 0) |
1355 | mlog_errno(ret); | |
1356 | goto out; | |
1357 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1358 | /* For existing xattr which has value outside */ | |
1359 | struct ocfs2_xattr_value_root *xv = NULL; | |
1360 | xv = (struct ocfs2_xattr_value_root *)(val + | |
1361 | OCFS2_XATTR_SIZE(name_len)); | |
1362 | ||
1363 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1364 | /* | |
1365 | * If new value need set outside also, | |
1366 | * first truncate old value to new value, | |
1367 | * then set new value with set_value_outside(). | |
1368 | */ | |
1369 | ret = ocfs2_xattr_value_truncate(inode, | |
1370 | xs->xattr_bh, | |
1371 | xv, | |
78f30c31 TM |
1372 | xi->value_len, |
1373 | ctxt); | |
cf1d6c76 TY |
1374 | if (ret < 0) { |
1375 | mlog_errno(ret); | |
1376 | goto out; | |
1377 | } | |
1378 | ||
85db90e7 TM |
1379 | ret = ocfs2_xattr_update_entry(inode, |
1380 | handle, | |
1381 | xi, | |
1382 | xs, | |
1383 | offs); | |
cf1d6c76 TY |
1384 | if (ret < 0) { |
1385 | mlog_errno(ret); | |
1386 | goto out; | |
1387 | } | |
1388 | ||
85db90e7 TM |
1389 | ret = __ocfs2_xattr_set_value_outside(inode, |
1390 | handle, | |
1391 | xv, | |
1392 | xi->value, | |
1393 | xi->value_len); | |
cf1d6c76 TY |
1394 | if (ret < 0) |
1395 | mlog_errno(ret); | |
1396 | goto out; | |
1397 | } else { | |
1398 | /* | |
1399 | * If new value need set in local, | |
1400 | * just trucate old value to zero. | |
1401 | */ | |
1402 | ret = ocfs2_xattr_value_truncate(inode, | |
85db90e7 TM |
1403 | xs->xattr_bh, |
1404 | xv, | |
1405 | 0, | |
1406 | ctxt); | |
cf1d6c76 TY |
1407 | if (ret < 0) |
1408 | mlog_errno(ret); | |
1409 | } | |
1410 | } | |
1411 | } | |
1412 | ||
cf1d6c76 TY |
1413 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, |
1414 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1415 | if (ret) { | |
1416 | mlog_errno(ret); | |
85db90e7 | 1417 | goto out; |
cf1d6c76 TY |
1418 | } |
1419 | ||
1420 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
cf1d6c76 TY |
1421 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
1422 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1423 | if (ret) { | |
1424 | mlog_errno(ret); | |
85db90e7 | 1425 | goto out; |
cf1d6c76 TY |
1426 | } |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * Set value in local, include set tree root in local. | |
1431 | * This is the first step for value size >INLINE_SIZE. | |
1432 | */ | |
1433 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1434 | ||
1435 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1436 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1437 | if (ret < 0) { | |
1438 | mlog_errno(ret); | |
85db90e7 | 1439 | goto out; |
cf1d6c76 TY |
1440 | } |
1441 | } | |
1442 | ||
1443 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1444 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1445 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1446 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1447 | ||
1448 | /* | |
1449 | * Adjust extent record count or inline data size | |
1450 | * to reserve space for extended attribute. | |
1451 | */ | |
1452 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1453 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1454 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1455 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1456 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1457 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1458 | sizeof(struct ocfs2_extent_rec))); | |
1459 | } | |
1460 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1461 | } | |
1462 | /* Update xattr flag */ | |
1463 | spin_lock(&oi->ip_lock); | |
1464 | oi->ip_dyn_features |= flag; | |
1465 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1466 | spin_unlock(&oi->ip_lock); | |
1467 | /* Update inode ctime */ | |
1468 | inode->i_ctime = CURRENT_TIME; | |
1469 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1470 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1471 | ||
1472 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1473 | if (ret < 0) | |
1474 | mlog_errno(ret); | |
1475 | ||
cf1d6c76 TY |
1476 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1477 | /* | |
1478 | * Set value outside in B tree. | |
1479 | * This is the second step for value size > INLINE_SIZE. | |
1480 | */ | |
1481 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
78f30c31 | 1482 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs); |
cf1d6c76 TY |
1483 | if (ret < 0) { |
1484 | int ret2; | |
1485 | ||
1486 | mlog_errno(ret); | |
1487 | /* | |
1488 | * If set value outside failed, we have to clean | |
1489 | * the junk tree root we have already set in local. | |
1490 | */ | |
85db90e7 TM |
1491 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
1492 | xi, xs, offs); | |
cf1d6c76 TY |
1493 | if (ret2 < 0) |
1494 | mlog_errno(ret2); | |
1495 | } | |
1496 | } | |
1497 | out: | |
1498 | return ret; | |
cf1d6c76 TY |
1499 | } |
1500 | ||
cf1d6c76 TY |
1501 | static int ocfs2_remove_value_outside(struct inode*inode, |
1502 | struct buffer_head *bh, | |
1503 | struct ocfs2_xattr_header *header) | |
1504 | { | |
1505 | int ret = 0, i; | |
78f30c31 TM |
1506 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1507 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
1508 | ||
1509 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 | 1510 | |
85db90e7 TM |
1511 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); |
1512 | if (IS_ERR(ctxt.handle)) { | |
1513 | ret = PTR_ERR(ctxt.handle); | |
1514 | mlog_errno(ret); | |
1515 | goto out; | |
1516 | } | |
1517 | ||
cf1d6c76 TY |
1518 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
1519 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1520 | ||
1521 | if (!ocfs2_xattr_is_local(entry)) { | |
1522 | struct ocfs2_xattr_value_root *xv; | |
1523 | void *val; | |
1524 | ||
1525 | val = (void *)header + | |
1526 | le16_to_cpu(entry->xe_name_offset); | |
1527 | xv = (struct ocfs2_xattr_value_root *) | |
1528 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
78f30c31 TM |
1529 | ret = ocfs2_xattr_value_truncate(inode, bh, xv, |
1530 | 0, &ctxt); | |
cf1d6c76 TY |
1531 | if (ret < 0) { |
1532 | mlog_errno(ret); | |
78f30c31 | 1533 | break; |
cf1d6c76 TY |
1534 | } |
1535 | } | |
1536 | } | |
1537 | ||
85db90e7 | 1538 | ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
1539 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1540 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 1541 | out: |
cf1d6c76 TY |
1542 | return ret; |
1543 | } | |
1544 | ||
1545 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1546 | struct buffer_head *di_bh) | |
1547 | { | |
1548 | ||
1549 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1550 | struct ocfs2_xattr_header *header; | |
1551 | int ret; | |
1552 | ||
1553 | header = (struct ocfs2_xattr_header *) | |
1554 | ((void *)di + inode->i_sb->s_blocksize - | |
1555 | le16_to_cpu(di->i_xattr_inline_size)); | |
1556 | ||
1557 | ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1558 | ||
1559 | return ret; | |
1560 | } | |
1561 | ||
1562 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1563 | struct buffer_head *blk_bh) | |
1564 | { | |
1565 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 TY |
1566 | int ret = 0; |
1567 | ||
1568 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1569 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1570 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
1571 | ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1572 | } else | |
1573 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1574 | |
1575 | return ret; | |
1576 | } | |
1577 | ||
08413899 TM |
1578 | static int ocfs2_xattr_free_block(struct inode *inode, |
1579 | u64 block) | |
1580 | { | |
1581 | struct inode *xb_alloc_inode; | |
1582 | struct buffer_head *xb_alloc_bh = NULL; | |
1583 | struct buffer_head *blk_bh = NULL; | |
1584 | struct ocfs2_xattr_block *xb; | |
1585 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1586 | handle_t *handle; | |
1587 | int ret = 0; | |
1588 | u64 blk, bg_blkno; | |
1589 | u16 bit; | |
1590 | ||
0fcaa56a | 1591 | ret = ocfs2_read_block(inode, block, &blk_bh); |
08413899 TM |
1592 | if (ret < 0) { |
1593 | mlog_errno(ret); | |
1594 | goto out; | |
1595 | } | |
1596 | ||
f6087fb7 JB |
1597 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
1598 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
1599 | ret = -EIO; | |
08413899 TM |
1600 | goto out; |
1601 | } | |
1602 | ||
1603 | ret = ocfs2_xattr_block_remove(inode, blk_bh); | |
1604 | if (ret < 0) { | |
1605 | mlog_errno(ret); | |
1606 | goto out; | |
1607 | } | |
1608 | ||
08413899 TM |
1609 | blk = le64_to_cpu(xb->xb_blkno); |
1610 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1611 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1612 | ||
1613 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1614 | EXTENT_ALLOC_SYSTEM_INODE, | |
1615 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1616 | if (!xb_alloc_inode) { | |
1617 | ret = -ENOMEM; | |
1618 | mlog_errno(ret); | |
1619 | goto out; | |
1620 | } | |
1621 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1622 | ||
1623 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1624 | if (ret < 0) { | |
1625 | mlog_errno(ret); | |
1626 | goto out_mutex; | |
1627 | } | |
1628 | ||
1629 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1630 | if (IS_ERR(handle)) { | |
1631 | ret = PTR_ERR(handle); | |
1632 | mlog_errno(ret); | |
1633 | goto out_unlock; | |
1634 | } | |
1635 | ||
1636 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1637 | bit, bg_blkno, 1); | |
1638 | if (ret < 0) | |
1639 | mlog_errno(ret); | |
1640 | ||
1641 | ocfs2_commit_trans(osb, handle); | |
1642 | out_unlock: | |
1643 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1644 | brelse(xb_alloc_bh); | |
1645 | out_mutex: | |
1646 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1647 | iput(xb_alloc_inode); | |
1648 | out: | |
1649 | brelse(blk_bh); | |
1650 | return ret; | |
1651 | } | |
1652 | ||
cf1d6c76 TY |
1653 | /* |
1654 | * ocfs2_xattr_remove() | |
1655 | * | |
1656 | * Free extended attribute resources associated with this inode. | |
1657 | */ | |
1658 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1659 | { | |
cf1d6c76 TY |
1660 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1661 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1662 | handle_t *handle; | |
1663 | int ret; | |
1664 | ||
8154da3d TY |
1665 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1666 | return 0; | |
1667 | ||
cf1d6c76 TY |
1668 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1669 | return 0; | |
1670 | ||
1671 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1672 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1673 | if (ret < 0) { | |
1674 | mlog_errno(ret); | |
1675 | goto out; | |
1676 | } | |
1677 | } | |
cf1d6c76 | 1678 | |
08413899 TM |
1679 | if (di->i_xattr_loc) { |
1680 | ret = ocfs2_xattr_free_block(inode, | |
1681 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1682 | if (ret < 0) { |
1683 | mlog_errno(ret); | |
1684 | goto out; | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1689 | OCFS2_INODE_UPDATE_CREDITS); | |
1690 | if (IS_ERR(handle)) { | |
1691 | ret = PTR_ERR(handle); | |
1692 | mlog_errno(ret); | |
1693 | goto out; | |
1694 | } | |
1695 | ret = ocfs2_journal_access(handle, inode, di_bh, | |
1696 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1697 | if (ret) { | |
1698 | mlog_errno(ret); | |
1699 | goto out_commit; | |
1700 | } | |
1701 | ||
08413899 | 1702 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1703 | |
1704 | spin_lock(&oi->ip_lock); | |
1705 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1706 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1707 | spin_unlock(&oi->ip_lock); | |
1708 | ||
1709 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1710 | if (ret < 0) | |
1711 | mlog_errno(ret); | |
1712 | out_commit: | |
1713 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1714 | out: | |
cf1d6c76 TY |
1715 | return ret; |
1716 | } | |
1717 | ||
1718 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1719 | struct ocfs2_dinode *di) | |
1720 | { | |
1721 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1722 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1723 | int free; | |
1724 | ||
1725 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1726 | return 0; | |
1727 | ||
1728 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1729 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1730 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1731 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1732 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1733 | le64_to_cpu(di->i_size); | |
1734 | } else { | |
1735 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1736 | free = (le16_to_cpu(el->l_count) - | |
1737 | le16_to_cpu(el->l_next_free_rec)) * | |
1738 | sizeof(struct ocfs2_extent_rec); | |
1739 | } | |
1740 | if (free >= xattrsize) | |
1741 | return 1; | |
1742 | ||
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * ocfs2_xattr_ibody_find() | |
1748 | * | |
1749 | * Find extended attribute in inode block and | |
1750 | * fill search info into struct ocfs2_xattr_search. | |
1751 | */ | |
1752 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1753 | int name_index, | |
1754 | const char *name, | |
1755 | struct ocfs2_xattr_search *xs) | |
1756 | { | |
1757 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1758 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1759 | int ret; | |
1760 | int has_space = 0; | |
1761 | ||
1762 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1763 | return 0; | |
1764 | ||
1765 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1766 | down_read(&oi->ip_alloc_sem); | |
1767 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1768 | up_read(&oi->ip_alloc_sem); | |
1769 | if (!has_space) | |
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | xs->xattr_bh = xs->inode_bh; | |
1774 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1775 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1776 | xs->header = (struct ocfs2_xattr_header *) | |
1777 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1778 | else | |
1779 | xs->header = (struct ocfs2_xattr_header *) | |
1780 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1781 | xs->base = (void *)xs->header; | |
1782 | xs->here = xs->header->xh_entries; | |
1783 | ||
1784 | /* Find the named attribute. */ | |
1785 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1786 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1787 | if (ret && ret != -ENODATA) | |
1788 | return ret; | |
1789 | xs->not_found = ret; | |
1790 | } | |
1791 | ||
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | /* | |
1796 | * ocfs2_xattr_ibody_set() | |
1797 | * | |
1798 | * Set, replace or remove an extended attribute into inode block. | |
1799 | * | |
1800 | */ | |
1801 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
1802 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
1803 | struct ocfs2_xattr_search *xs, |
1804 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
1805 | { |
1806 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1807 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1808 | int ret; | |
1809 | ||
1810 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1811 | return -ENOSPC; | |
1812 | ||
1813 | down_write(&oi->ip_alloc_sem); | |
1814 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1815 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
1816 | ret = -ENOSPC; | |
1817 | goto out; | |
1818 | } | |
1819 | } | |
1820 | ||
78f30c31 | 1821 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
1822 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
1823 | out: | |
1824 | up_write(&oi->ip_alloc_sem); | |
1825 | ||
1826 | return ret; | |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * ocfs2_xattr_block_find() | |
1831 | * | |
1832 | * Find extended attribute in external block and | |
1833 | * fill search info into struct ocfs2_xattr_search. | |
1834 | */ | |
1835 | static int ocfs2_xattr_block_find(struct inode *inode, | |
1836 | int name_index, | |
1837 | const char *name, | |
1838 | struct ocfs2_xattr_search *xs) | |
1839 | { | |
1840 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1841 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 1842 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1843 | int ret = 0; |
1844 | ||
1845 | if (!di->i_xattr_loc) | |
1846 | return ret; | |
1847 | ||
0fcaa56a | 1848 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
1849 | if (ret < 0) { |
1850 | mlog_errno(ret); | |
1851 | return ret; | |
1852 | } | |
f6087fb7 JB |
1853 | |
1854 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1855 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
1856 | ret = -EIO; | |
1857 | goto cleanup; | |
cf1d6c76 TY |
1858 | } |
1859 | ||
1860 | xs->xattr_bh = blk_bh; | |
589dc260 TM |
1861 | |
1862 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1863 | xs->header = &xb->xb_attrs.xb_header; | |
1864 | xs->base = (void *)xs->header; | |
1865 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
1866 | xs->here = xs->header->xh_entries; | |
1867 | ||
1868 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1869 | } else | |
1870 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
1871 | name_index, | |
1872 | name, xs); | |
cf1d6c76 | 1873 | |
cf1d6c76 TY |
1874 | if (ret && ret != -ENODATA) { |
1875 | xs->xattr_bh = NULL; | |
1876 | goto cleanup; | |
1877 | } | |
1878 | xs->not_found = ret; | |
1879 | return 0; | |
cf1d6c76 TY |
1880 | cleanup: |
1881 | brelse(blk_bh); | |
1882 | ||
1883 | return ret; | |
1884 | } | |
1885 | ||
1886 | /* | |
1887 | * ocfs2_xattr_block_set() | |
1888 | * | |
1889 | * Set, replace or remove an extended attribute into external block. | |
1890 | * | |
1891 | */ | |
1892 | static int ocfs2_xattr_block_set(struct inode *inode, | |
1893 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
1894 | struct ocfs2_xattr_search *xs, |
1895 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
1896 | { |
1897 | struct buffer_head *new_bh = NULL; | |
1898 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1899 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
85db90e7 | 1900 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1901 | struct ocfs2_xattr_block *xblk = NULL; |
1902 | u16 suballoc_bit_start; | |
1903 | u32 num_got; | |
1904 | u64 first_blkno; | |
1905 | int ret; | |
1906 | ||
1907 | if (!xs->xattr_bh) { | |
cf1d6c76 TY |
1908 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, |
1909 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1910 | if (ret < 0) { | |
1911 | mlog_errno(ret); | |
85db90e7 | 1912 | goto end; |
cf1d6c76 TY |
1913 | } |
1914 | ||
78f30c31 | 1915 | ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, |
cf1d6c76 TY |
1916 | &suballoc_bit_start, &num_got, |
1917 | &first_blkno); | |
1918 | if (ret < 0) { | |
1919 | mlog_errno(ret); | |
85db90e7 | 1920 | goto end; |
cf1d6c76 TY |
1921 | } |
1922 | ||
1923 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
1924 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
1925 | ||
1926 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
1927 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1928 | if (ret < 0) { | |
1929 | mlog_errno(ret); | |
85db90e7 | 1930 | goto end; |
cf1d6c76 TY |
1931 | } |
1932 | ||
1933 | /* Initialize ocfs2_xattr_block */ | |
1934 | xs->xattr_bh = new_bh; | |
1935 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
1936 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
1937 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
1938 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
1939 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
1940 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
1941 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
1942 | ||
1943 | xs->header = &xblk->xb_attrs.xb_header; | |
1944 | xs->base = (void *)xs->header; | |
1945 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
1946 | xs->here = xs->header->xh_entries; | |
1947 | ||
cf1d6c76 TY |
1948 | ret = ocfs2_journal_dirty(handle, new_bh); |
1949 | if (ret < 0) { | |
1950 | mlog_errno(ret); | |
85db90e7 | 1951 | goto end; |
cf1d6c76 TY |
1952 | } |
1953 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
85db90e7 | 1954 | ocfs2_journal_dirty(handle, xs->inode_bh); |
01225596 TM |
1955 | } else |
1956 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
1957 | ||
1958 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1959 | /* Set extended attribute into external block */ | |
78f30c31 TM |
1960 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
1961 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
1962 | if (!ret || ret != -ENOSPC) |
1963 | goto end; | |
1964 | ||
78f30c31 | 1965 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
1966 | if (ret) |
1967 | goto end; | |
cf1d6c76 TY |
1968 | } |
1969 | ||
78f30c31 | 1970 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
1971 | |
1972 | end: | |
cf1d6c76 TY |
1973 | |
1974 | return ret; | |
1975 | } | |
1976 | ||
78f30c31 TM |
1977 | /* Check whether the new xattr can be inserted into the inode. */ |
1978 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
1979 | struct ocfs2_xattr_info *xi, | |
1980 | struct ocfs2_xattr_search *xs) | |
1981 | { | |
1982 | u64 value_size; | |
1983 | struct ocfs2_xattr_entry *last; | |
1984 | int free, i; | |
1985 | size_t min_offs = xs->end - xs->base; | |
1986 | ||
1987 | if (!xs->header) | |
1988 | return 0; | |
1989 | ||
1990 | last = xs->header->xh_entries; | |
1991 | ||
1992 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1993 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1994 | if (offs < min_offs) | |
1995 | min_offs = offs; | |
1996 | last += 1; | |
1997 | } | |
1998 | ||
1999 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
2000 | if (free < 0) | |
2001 | return 0; | |
2002 | ||
2003 | BUG_ON(!xs->not_found); | |
2004 | ||
2005 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2006 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2007 | else | |
2008 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2009 | ||
2010 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2011 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2012 | return 1; | |
2013 | ||
2014 | return 0; | |
2015 | } | |
2016 | ||
2017 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2018 | struct ocfs2_dinode *di, | |
2019 | struct ocfs2_xattr_info *xi, | |
2020 | struct ocfs2_xattr_search *xis, | |
2021 | struct ocfs2_xattr_search *xbs, | |
2022 | int *clusters_need, | |
85db90e7 TM |
2023 | int *meta_need, |
2024 | int *credits_need) | |
78f30c31 TM |
2025 | { |
2026 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2027 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2028 | struct buffer_head *bh = NULL; |
2029 | struct ocfs2_xattr_block *xb = NULL; | |
2030 | struct ocfs2_xattr_entry *xe = NULL; | |
2031 | struct ocfs2_xattr_value_root *xv = NULL; | |
2032 | char *base = NULL; | |
2033 | int name_offset, name_len = 0; | |
2034 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2035 | xi->value_len); | |
2036 | u64 value_size; | |
2037 | ||
78f30c31 | 2038 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2039 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2040 | ||
2041 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2042 | clusters_add += new_clusters; |
85db90e7 TM |
2043 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2044 | &def_xv.xv.xr_list, | |
2045 | new_clusters); | |
2046 | } | |
78f30c31 TM |
2047 | |
2048 | goto meta_guess; | |
2049 | } | |
2050 | ||
2051 | if (!xis->not_found) { | |
2052 | xe = xis->here; | |
2053 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2054 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2055 | base = xis->base; | |
85db90e7 | 2056 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 TM |
2057 | } else { |
2058 | int i, block_off; | |
2059 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2060 | xe = xbs->here; | |
2061 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2062 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2063 | i = xbs->here - xbs->header->xh_entries; | |
2064 | old_in_xb = 1; | |
2065 | ||
2066 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2067 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2068 | bucket_xh(xbs->bucket), | |
2069 | i, &block_off, | |
2070 | &name_offset); | |
2071 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2072 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2073 | } else { | |
78f30c31 | 2074 | base = xbs->base; |
85db90e7 TM |
2075 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2076 | } | |
2077 | } | |
2078 | ||
2079 | /* | |
2080 | * delete a xattr doesn't need metadata and cluster allocation. | |
2081 | * so just calculate the credits and return. | |
2082 | * | |
2083 | * The credits for removing the value tree will be extended | |
2084 | * by ocfs2_remove_extent itself. | |
2085 | */ | |
2086 | if (!xi->value) { | |
2087 | if (!ocfs2_xattr_is_local(xe)) | |
2088 | credits += OCFS2_REMOVE_EXTENT_CREDITS; | |
2089 | ||
2090 | goto out; | |
78f30c31 TM |
2091 | } |
2092 | ||
2093 | /* do cluster allocation guess first. */ | |
2094 | value_size = le64_to_cpu(xe->xe_value_size); | |
2095 | ||
2096 | if (old_in_xb) { | |
2097 | /* | |
2098 | * In xattr set, we always try to set the xe in inode first, | |
2099 | * so if it can be inserted into inode successfully, the old | |
2100 | * one will be removed from the xattr block, and this xattr | |
2101 | * will be inserted into inode as a new xattr in inode. | |
2102 | */ | |
2103 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2104 | clusters_add += new_clusters; | |
85db90e7 TM |
2105 | credits += OCFS2_REMOVE_EXTENT_CREDITS + |
2106 | OCFS2_INODE_UPDATE_CREDITS; | |
2107 | if (!ocfs2_xattr_is_local(xe)) | |
2108 | credits += ocfs2_calc_extend_credits( | |
2109 | inode->i_sb, | |
2110 | &def_xv.xv.xr_list, | |
2111 | new_clusters); | |
78f30c31 TM |
2112 | goto out; |
2113 | } | |
2114 | } | |
2115 | ||
2116 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2117 | /* the new values will be stored outside. */ | |
2118 | u32 old_clusters = 0; | |
2119 | ||
2120 | if (!ocfs2_xattr_is_local(xe)) { | |
2121 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2122 | value_size); | |
2123 | xv = (struct ocfs2_xattr_value_root *) | |
2124 | (base + name_offset + name_len); | |
2125 | } else | |
2126 | xv = &def_xv.xv; | |
2127 | ||
85db90e7 TM |
2128 | if (old_clusters >= new_clusters) { |
2129 | credits += OCFS2_REMOVE_EXTENT_CREDITS; | |
78f30c31 | 2130 | goto out; |
85db90e7 | 2131 | } else { |
78f30c31 TM |
2132 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2133 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2134 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2135 | &xv->xr_list, | |
2136 | new_clusters - | |
2137 | old_clusters); | |
78f30c31 TM |
2138 | goto out; |
2139 | } | |
2140 | } else { | |
2141 | /* | |
2142 | * Now the new value will be stored inside. So if the new | |
2143 | * value is smaller than the size of value root or the old | |
2144 | * value, we don't need any allocation, otherwise we have | |
2145 | * to guess metadata allocation. | |
2146 | */ | |
2147 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2148 | (!ocfs2_xattr_is_local(xe) && | |
2149 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2150 | goto out; | |
2151 | } | |
2152 | ||
2153 | meta_guess: | |
2154 | /* calculate metadata allocation. */ | |
2155 | if (di->i_xattr_loc) { | |
2156 | if (!xbs->xattr_bh) { | |
2157 | ret = ocfs2_read_block(inode, | |
2158 | le64_to_cpu(di->i_xattr_loc), | |
2159 | &bh); | |
2160 | if (ret) { | |
2161 | mlog_errno(ret); | |
2162 | goto out; | |
2163 | } | |
2164 | ||
2165 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2166 | } else | |
2167 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2168 | ||
2169 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2170 | struct ocfs2_extent_list *el = | |
2171 | &xb->xb_attrs.xb_root.xt_list; | |
2172 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2173 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2174 | el, 1); | |
78f30c31 TM |
2175 | } |
2176 | ||
2177 | /* | |
2178 | * This cluster will be used either for new bucket or for | |
2179 | * new xattr block. | |
2180 | * If the cluster size is the same as the bucket size, one | |
2181 | * more is needed since we may need to extend the bucket | |
2182 | * also. | |
2183 | */ | |
2184 | clusters_add += 1; | |
85db90e7 | 2185 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2186 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2187 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2188 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2189 | clusters_add += 1; |
85db90e7 TM |
2190 | } |
2191 | } else { | |
78f30c31 | 2192 | meta_add += 1; |
85db90e7 TM |
2193 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2194 | } | |
78f30c31 TM |
2195 | out: |
2196 | if (clusters_need) | |
2197 | *clusters_need = clusters_add; | |
2198 | if (meta_need) | |
2199 | *meta_need = meta_add; | |
85db90e7 TM |
2200 | if (credits_need) |
2201 | *credits_need = credits; | |
78f30c31 TM |
2202 | brelse(bh); |
2203 | return ret; | |
2204 | } | |
2205 | ||
2206 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2207 | struct ocfs2_dinode *di, | |
2208 | struct ocfs2_xattr_info *xi, | |
2209 | struct ocfs2_xattr_search *xis, | |
2210 | struct ocfs2_xattr_search *xbs, | |
85db90e7 TM |
2211 | struct ocfs2_xattr_set_ctxt *ctxt, |
2212 | int *credits) | |
78f30c31 TM |
2213 | { |
2214 | int clusters_add, meta_add, ret; | |
2215 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2216 | ||
2217 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2218 | ||
2219 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2220 | ||
2221 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2222 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2223 | if (ret) { |
2224 | mlog_errno(ret); | |
2225 | return ret; | |
2226 | } | |
2227 | ||
85db90e7 TM |
2228 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2229 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2230 | |
2231 | if (meta_add) { | |
2232 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2233 | &ctxt->meta_ac); | |
2234 | if (ret) { | |
2235 | mlog_errno(ret); | |
2236 | goto out; | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | if (clusters_add) { | |
2241 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2242 | if (ret) | |
2243 | mlog_errno(ret); | |
2244 | } | |
2245 | out: | |
2246 | if (ret) { | |
2247 | if (ctxt->meta_ac) { | |
2248 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2249 | ctxt->meta_ac = NULL; | |
2250 | } | |
2251 | ||
2252 | /* | |
2253 | * We cannot have an error and a non null ctxt->data_ac. | |
2254 | */ | |
2255 | } | |
2256 | ||
2257 | return ret; | |
2258 | } | |
2259 | ||
85db90e7 TM |
2260 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2261 | struct ocfs2_dinode *di, | |
2262 | struct ocfs2_xattr_info *xi, | |
2263 | struct ocfs2_xattr_search *xis, | |
2264 | struct ocfs2_xattr_search *xbs, | |
2265 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2266 | { | |
2267 | int ret = 0, credits; | |
2268 | ||
2269 | if (!xi->value) { | |
2270 | /* Remove existing extended attribute */ | |
2271 | if (!xis->not_found) | |
2272 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2273 | else if (!xbs->not_found) | |
2274 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2275 | } else { | |
2276 | /* We always try to set extended attribute into inode first*/ | |
2277 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2278 | if (!ret && !xbs->not_found) { | |
2279 | /* | |
2280 | * If succeed and that extended attribute existing in | |
2281 | * external block, then we will remove it. | |
2282 | */ | |
2283 | xi->value = NULL; | |
2284 | xi->value_len = 0; | |
2285 | ||
2286 | xis->not_found = -ENODATA; | |
2287 | ret = ocfs2_calc_xattr_set_need(inode, | |
2288 | di, | |
2289 | xi, | |
2290 | xis, | |
2291 | xbs, | |
2292 | NULL, | |
2293 | NULL, | |
2294 | &credits); | |
2295 | if (ret) { | |
2296 | mlog_errno(ret); | |
2297 | goto out; | |
2298 | } | |
2299 | ||
2300 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2301 | ctxt->handle->h_buffer_credits); | |
2302 | if (ret) { | |
2303 | mlog_errno(ret); | |
2304 | goto out; | |
2305 | } | |
2306 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2307 | } else if (ret == -ENOSPC) { | |
2308 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2309 | ret = ocfs2_xattr_block_find(inode, | |
2310 | xi->name_index, | |
2311 | xi->name, xbs); | |
2312 | if (ret) | |
2313 | goto out; | |
2314 | ||
2315 | xis->not_found = -ENODATA; | |
2316 | ret = ocfs2_calc_xattr_set_need(inode, | |
2317 | di, | |
2318 | xi, | |
2319 | xis, | |
2320 | xbs, | |
2321 | NULL, | |
2322 | NULL, | |
2323 | &credits); | |
2324 | if (ret) { | |
2325 | mlog_errno(ret); | |
2326 | goto out; | |
2327 | } | |
2328 | ||
2329 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2330 | ctxt->handle->h_buffer_credits); | |
2331 | if (ret) { | |
2332 | mlog_errno(ret); | |
2333 | goto out; | |
2334 | } | |
2335 | } | |
2336 | /* | |
2337 | * If no space in inode, we will set extended attribute | |
2338 | * into external block. | |
2339 | */ | |
2340 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2341 | if (ret) | |
2342 | goto out; | |
2343 | if (!xis->not_found) { | |
2344 | /* | |
2345 | * If succeed and that extended attribute | |
2346 | * existing in inode, we will remove it. | |
2347 | */ | |
2348 | xi->value = NULL; | |
2349 | xi->value_len = 0; | |
2350 | xbs->not_found = -ENODATA; | |
2351 | ret = ocfs2_calc_xattr_set_need(inode, | |
2352 | di, | |
2353 | xi, | |
2354 | xis, | |
2355 | xbs, | |
2356 | NULL, | |
2357 | NULL, | |
2358 | &credits); | |
2359 | if (ret) { | |
2360 | mlog_errno(ret); | |
2361 | goto out; | |
2362 | } | |
2363 | ||
2364 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2365 | ctxt->handle->h_buffer_credits); | |
2366 | if (ret) { | |
2367 | mlog_errno(ret); | |
2368 | goto out; | |
2369 | } | |
2370 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2371 | xis, ctxt); | |
2372 | } | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | out: | |
2377 | return ret; | |
2378 | } | |
2379 | ||
6c3faba4 TY |
2380 | /* |
2381 | * This function only called duing creating inode | |
2382 | * for init security/acl xattrs of the new inode. | |
2383 | * The xattrs could be put into ibody or extent block, | |
2384 | * xattr bucket would not be use in this case. | |
2385 | * transanction credits also be reserved in here. | |
2386 | */ | |
2387 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2388 | struct inode *inode, | |
2389 | struct buffer_head *di_bh, | |
2390 | int name_index, | |
2391 | const char *name, | |
2392 | const void *value, | |
2393 | size_t value_len, | |
2394 | int flags, | |
2395 | struct ocfs2_alloc_context *meta_ac, | |
2396 | struct ocfs2_alloc_context *data_ac) | |
2397 | { | |
2398 | struct ocfs2_dinode *di; | |
2399 | int ret; | |
2400 | ||
2401 | struct ocfs2_xattr_info xi = { | |
2402 | .name_index = name_index, | |
2403 | .name = name, | |
2404 | .value = value, | |
2405 | .value_len = value_len, | |
2406 | }; | |
2407 | ||
2408 | struct ocfs2_xattr_search xis = { | |
2409 | .not_found = -ENODATA, | |
2410 | }; | |
2411 | ||
2412 | struct ocfs2_xattr_search xbs = { | |
2413 | .not_found = -ENODATA, | |
2414 | }; | |
2415 | ||
2416 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2417 | .handle = handle, | |
2418 | .meta_ac = meta_ac, | |
2419 | .data_ac = data_ac, | |
2420 | }; | |
2421 | ||
2422 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2423 | return -EOPNOTSUPP; | |
2424 | ||
2425 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2426 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2427 | ||
2428 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2429 | ||
2430 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2431 | if (ret) | |
2432 | goto cleanup; | |
2433 | if (xis.not_found) { | |
2434 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2435 | if (ret) | |
2436 | goto cleanup; | |
2437 | } | |
2438 | ||
2439 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2440 | ||
2441 | cleanup: | |
2442 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2443 | brelse(xbs.xattr_bh); | |
2444 | ||
2445 | return ret; | |
2446 | } | |
2447 | ||
cf1d6c76 TY |
2448 | /* |
2449 | * ocfs2_xattr_set() | |
2450 | * | |
2451 | * Set, replace or remove an extended attribute for this inode. | |
2452 | * value is NULL to remove an existing extended attribute, else either | |
2453 | * create or replace an extended attribute. | |
2454 | */ | |
2455 | int ocfs2_xattr_set(struct inode *inode, | |
2456 | int name_index, | |
2457 | const char *name, | |
2458 | const void *value, | |
2459 | size_t value_len, | |
2460 | int flags) | |
2461 | { | |
2462 | struct buffer_head *di_bh = NULL; | |
2463 | struct ocfs2_dinode *di; | |
85db90e7 | 2464 | int ret, credits; |
78f30c31 | 2465 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2466 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2467 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
cf1d6c76 TY |
2468 | |
2469 | struct ocfs2_xattr_info xi = { | |
2470 | .name_index = name_index, | |
2471 | .name = name, | |
2472 | .value = value, | |
2473 | .value_len = value_len, | |
2474 | }; | |
2475 | ||
2476 | struct ocfs2_xattr_search xis = { | |
2477 | .not_found = -ENODATA, | |
2478 | }; | |
2479 | ||
2480 | struct ocfs2_xattr_search xbs = { | |
2481 | .not_found = -ENODATA, | |
2482 | }; | |
2483 | ||
8154da3d TY |
2484 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2485 | return -EOPNOTSUPP; | |
2486 | ||
ba937127 JB |
2487 | /* |
2488 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2489 | * bucket. | |
2490 | */ | |
2491 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2492 | if (!xbs.bucket) { | |
2493 | mlog_errno(-ENOMEM); | |
2494 | return -ENOMEM; | |
2495 | } | |
2496 | ||
cf1d6c76 TY |
2497 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2498 | if (ret < 0) { | |
2499 | mlog_errno(ret); | |
ba937127 | 2500 | goto cleanup_nolock; |
cf1d6c76 TY |
2501 | } |
2502 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2503 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2504 | ||
2505 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2506 | /* | |
2507 | * Scan inode and external block to find the same name | |
2508 | * extended attribute and collect search infomation. | |
2509 | */ | |
2510 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2511 | if (ret) | |
2512 | goto cleanup; | |
2513 | if (xis.not_found) { | |
2514 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2515 | if (ret) | |
2516 | goto cleanup; | |
2517 | } | |
2518 | ||
2519 | if (xis.not_found && xbs.not_found) { | |
2520 | ret = -ENODATA; | |
2521 | if (flags & XATTR_REPLACE) | |
2522 | goto cleanup; | |
2523 | ret = 0; | |
2524 | if (!value) | |
2525 | goto cleanup; | |
2526 | } else { | |
2527 | ret = -EEXIST; | |
2528 | if (flags & XATTR_CREATE) | |
2529 | goto cleanup; | |
2530 | } | |
2531 | ||
85db90e7 TM |
2532 | |
2533 | mutex_lock(&tl_inode->i_mutex); | |
2534 | ||
2535 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2536 | ret = __ocfs2_flush_truncate_log(osb); | |
2537 | if (ret < 0) { | |
2538 | mutex_unlock(&tl_inode->i_mutex); | |
2539 | mlog_errno(ret); | |
2540 | goto cleanup; | |
2541 | } | |
2542 | } | |
2543 | mutex_unlock(&tl_inode->i_mutex); | |
2544 | ||
2545 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
2546 | &xbs, &ctxt, &credits); | |
78f30c31 TM |
2547 | if (ret) { |
2548 | mlog_errno(ret); | |
2549 | goto cleanup; | |
2550 | } | |
2551 | ||
85db90e7 TM |
2552 | ctxt.handle = ocfs2_start_trans(osb, credits); |
2553 | if (IS_ERR(ctxt.handle)) { | |
2554 | ret = PTR_ERR(ctxt.handle); | |
2555 | mlog_errno(ret); | |
2556 | goto cleanup; | |
cf1d6c76 | 2557 | } |
85db90e7 TM |
2558 | |
2559 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2560 | ||
2561 | ocfs2_commit_trans(osb, ctxt.handle); | |
2562 | ||
78f30c31 TM |
2563 | if (ctxt.data_ac) |
2564 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2565 | if (ctxt.meta_ac) | |
2566 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2567 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2568 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2569 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2570 | cleanup: |
2571 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2572 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2573 | cleanup_nolock: |
cf1d6c76 TY |
2574 | brelse(di_bh); |
2575 | brelse(xbs.xattr_bh); | |
ba937127 | 2576 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2577 | |
2578 | return ret; | |
2579 | } | |
2580 | ||
0c044f0b TM |
2581 | /* |
2582 | * Find the xattr extent rec which may contains name_hash. | |
2583 | * e_cpos will be the first name hash of the xattr rec. | |
2584 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2585 | */ | |
2586 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2587 | u32 name_hash, | |
2588 | u64 *p_blkno, | |
2589 | u32 *e_cpos, | |
2590 | u32 *num_clusters, | |
2591 | struct ocfs2_extent_list *el) | |
2592 | { | |
2593 | int ret = 0, i; | |
2594 | struct buffer_head *eb_bh = NULL; | |
2595 | struct ocfs2_extent_block *eb; | |
2596 | struct ocfs2_extent_rec *rec = NULL; | |
2597 | u64 e_blkno = 0; | |
2598 | ||
2599 | if (el->l_tree_depth) { | |
2600 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2601 | if (ret) { | |
2602 | mlog_errno(ret); | |
2603 | goto out; | |
2604 | } | |
2605 | ||
2606 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2607 | el = &eb->h_list; | |
2608 | ||
2609 | if (el->l_tree_depth) { | |
2610 | ocfs2_error(inode->i_sb, | |
2611 | "Inode %lu has non zero tree depth in " | |
2612 | "xattr tree block %llu\n", inode->i_ino, | |
2613 | (unsigned long long)eb_bh->b_blocknr); | |
2614 | ret = -EROFS; | |
2615 | goto out; | |
2616 | } | |
2617 | } | |
2618 | ||
2619 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2620 | rec = &el->l_recs[i]; | |
2621 | ||
2622 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2623 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2624 | break; | |
2625 | } | |
2626 | } | |
2627 | ||
2628 | if (!e_blkno) { | |
2629 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2630 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2631 | le32_to_cpu(rec->e_cpos), | |
2632 | ocfs2_rec_clusters(el, rec)); | |
2633 | ret = -EROFS; | |
2634 | goto out; | |
2635 | } | |
2636 | ||
2637 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2638 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2639 | if (e_cpos) | |
2640 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2641 | out: | |
2642 | brelse(eb_bh); | |
2643 | return ret; | |
2644 | } | |
2645 | ||
2646 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2647 | struct ocfs2_xattr_bucket *bucket, | |
2648 | void *para); | |
2649 | ||
589dc260 | 2650 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2651 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2652 | int name_index, |
2653 | const char *name, | |
2654 | u32 name_hash, | |
2655 | u16 *xe_index, | |
2656 | int *found) | |
2657 | { | |
2658 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2659 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2660 | size_t name_len = strlen(name); |
2661 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2662 | char *xe_name; |
2663 | ||
2664 | /* | |
2665 | * We don't use binary search in the bucket because there | |
2666 | * may be multiple entries with the same name hash. | |
2667 | */ | |
2668 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2669 | xe = &xh->xh_entries[i]; | |
2670 | ||
2671 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2672 | continue; | |
2673 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2674 | break; | |
2675 | ||
2676 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2677 | if (!cmp) | |
2678 | cmp = name_len - xe->xe_name_len; | |
2679 | if (cmp) | |
2680 | continue; | |
2681 | ||
2682 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2683 | xh, | |
2684 | i, | |
2685 | &block_off, | |
2686 | &new_offset); | |
2687 | if (ret) { | |
2688 | mlog_errno(ret); | |
2689 | break; | |
2690 | } | |
2691 | ||
e2356a3f JB |
2692 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2693 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2694 | *xe_index = i; |
2695 | *found = 1; | |
2696 | ret = 0; | |
2697 | break; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | return ret; | |
2702 | } | |
2703 | ||
2704 | /* | |
2705 | * Find the specified xattr entry in a series of buckets. | |
2706 | * This series start from p_blkno and last for num_clusters. | |
2707 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2708 | * the num of the valid buckets. | |
2709 | * | |
2710 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2711 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2712 | */ | |
2713 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2714 | int name_index, | |
2715 | const char *name, | |
2716 | u32 name_hash, | |
2717 | u64 p_blkno, | |
2718 | u32 first_hash, | |
2719 | u32 num_clusters, | |
2720 | struct ocfs2_xattr_search *xs) | |
2721 | { | |
2722 | int ret, found = 0; | |
589dc260 TM |
2723 | struct ocfs2_xattr_header *xh = NULL; |
2724 | struct ocfs2_xattr_entry *xe = NULL; | |
2725 | u16 index = 0; | |
2726 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2727 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2728 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2729 | u32 last_hash; |
e2356a3f | 2730 | u64 blkno, lower_blkno = 0; |
589dc260 | 2731 | |
e2356a3f JB |
2732 | search = ocfs2_xattr_bucket_new(inode); |
2733 | if (!search) { | |
2734 | ret = -ENOMEM; | |
2735 | mlog_errno(ret); | |
2736 | goto out; | |
2737 | } | |
2738 | ||
2739 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2740 | if (ret) { |
2741 | mlog_errno(ret); | |
2742 | goto out; | |
2743 | } | |
2744 | ||
e2356a3f | 2745 | xh = bucket_xh(search); |
589dc260 | 2746 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 2747 | while (low_bucket <= high_bucket) { |
e2356a3f | 2748 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 2749 | |
e2356a3f | 2750 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 2751 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 2752 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
2753 | if (ret) { |
2754 | mlog_errno(ret); | |
2755 | goto out; | |
2756 | } | |
2757 | ||
e2356a3f | 2758 | xh = bucket_xh(search); |
589dc260 TM |
2759 | xe = &xh->xh_entries[0]; |
2760 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
2761 | high_bucket = bucket - 1; | |
2762 | continue; | |
2763 | } | |
2764 | ||
2765 | /* | |
2766 | * Check whether the hash of the last entry in our | |
5a095611 TM |
2767 | * bucket is larger than the search one. for an empty |
2768 | * bucket, the last one is also the first one. | |
589dc260 | 2769 | */ |
5a095611 TM |
2770 | if (xh->xh_count) |
2771 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
2772 | ||
589dc260 TM |
2773 | last_hash = le32_to_cpu(xe->xe_name_hash); |
2774 | ||
e2356a3f JB |
2775 | /* record lower_blkno which may be the insert place. */ |
2776 | lower_blkno = blkno; | |
589dc260 TM |
2777 | |
2778 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
2779 | low_bucket = bucket + 1; | |
2780 | continue; | |
2781 | } | |
2782 | ||
2783 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 2784 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
2785 | name_index, name, name_hash, |
2786 | &index, &found); | |
2787 | if (ret) { | |
2788 | mlog_errno(ret); | |
2789 | goto out; | |
2790 | } | |
2791 | break; | |
2792 | } | |
2793 | ||
2794 | /* | |
2795 | * Record the bucket we have found. | |
2796 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
2797 | * always set it to the previous bucket. | |
2798 | */ | |
e2356a3f JB |
2799 | if (!lower_blkno) |
2800 | lower_blkno = p_blkno; | |
2801 | ||
2802 | /* This should be in cache - we just read it during the search */ | |
2803 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
2804 | if (ret) { | |
2805 | mlog_errno(ret); | |
2806 | goto out; | |
589dc260 | 2807 | } |
589dc260 | 2808 | |
ba937127 JB |
2809 | xs->header = bucket_xh(xs->bucket); |
2810 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
2811 | xs->end = xs->base + inode->i_sb->s_blocksize; |
2812 | ||
2813 | if (found) { | |
589dc260 TM |
2814 | xs->here = &xs->header->xh_entries[index]; |
2815 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 2816 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
2817 | } else |
2818 | ret = -ENODATA; | |
2819 | ||
2820 | out: | |
e2356a3f | 2821 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
2822 | return ret; |
2823 | } | |
2824 | ||
2825 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
2826 | struct buffer_head *root_bh, | |
2827 | int name_index, | |
2828 | const char *name, | |
2829 | struct ocfs2_xattr_search *xs) | |
2830 | { | |
2831 | int ret; | |
2832 | struct ocfs2_xattr_block *xb = | |
2833 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
2834 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
2835 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
2836 | u64 p_blkno = 0; | |
2837 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 2838 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
2839 | |
2840 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2841 | return -ENODATA; | |
2842 | ||
2843 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
2844 | name, name_hash, name_index); | |
2845 | ||
2846 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
2847 | &num_clusters, el); | |
2848 | if (ret) { | |
2849 | mlog_errno(ret); | |
2850 | goto out; | |
2851 | } | |
2852 | ||
2853 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
2854 | ||
2855 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
2856 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
2857 | first_hash); | |
589dc260 TM |
2858 | |
2859 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
2860 | p_blkno, first_hash, num_clusters, xs); | |
2861 | ||
2862 | out: | |
2863 | return ret; | |
2864 | } | |
2865 | ||
0c044f0b TM |
2866 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
2867 | u64 blkno, | |
2868 | u32 clusters, | |
2869 | xattr_bucket_func *func, | |
2870 | void *para) | |
2871 | { | |
6dde41d9 | 2872 | int i, ret = 0; |
0c044f0b TM |
2873 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
2874 | u32 num_buckets = clusters * bpc; | |
ba937127 | 2875 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 2876 | |
ba937127 JB |
2877 | bucket = ocfs2_xattr_bucket_new(inode); |
2878 | if (!bucket) { | |
2879 | mlog_errno(-ENOMEM); | |
2880 | return -ENOMEM; | |
2881 | } | |
0c044f0b TM |
2882 | |
2883 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 2884 | clusters, (unsigned long long)blkno); |
0c044f0b | 2885 | |
ba937127 JB |
2886 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
2887 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
2888 | if (ret) { |
2889 | mlog_errno(ret); | |
ba937127 | 2890 | break; |
0c044f0b TM |
2891 | } |
2892 | ||
0c044f0b TM |
2893 | /* |
2894 | * The real bucket num in this series of blocks is stored | |
2895 | * in the 1st bucket. | |
2896 | */ | |
2897 | if (i == 0) | |
ba937127 | 2898 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 2899 | |
de29c085 MF |
2900 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
2901 | (unsigned long long)blkno, | |
ba937127 | 2902 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 2903 | if (func) { |
ba937127 JB |
2904 | ret = func(inode, bucket, para); |
2905 | if (ret) | |
0c044f0b | 2906 | mlog_errno(ret); |
ba937127 | 2907 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
2908 | } |
2909 | ||
ba937127 JB |
2910 | ocfs2_xattr_bucket_relse(bucket); |
2911 | if (ret) | |
2912 | break; | |
0c044f0b TM |
2913 | } |
2914 | ||
ba937127 | 2915 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
2916 | return ret; |
2917 | } | |
2918 | ||
2919 | struct ocfs2_xattr_tree_list { | |
2920 | char *buffer; | |
2921 | size_t buffer_size; | |
936b8834 | 2922 | size_t result; |
0c044f0b TM |
2923 | }; |
2924 | ||
2925 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
2926 | struct ocfs2_xattr_header *xh, | |
2927 | int index, | |
2928 | int *block_off, | |
2929 | int *new_offset) | |
2930 | { | |
2931 | u16 name_offset; | |
2932 | ||
2933 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
2934 | return -EINVAL; | |
2935 | ||
2936 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
2937 | ||
2938 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
2939 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
2940 | ||
2941 | return 0; | |
2942 | } | |
2943 | ||
2944 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
2945 | struct ocfs2_xattr_bucket *bucket, | |
2946 | void *para) | |
2947 | { | |
936b8834 | 2948 | int ret = 0, type; |
0c044f0b | 2949 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 2950 | int i, block_off, new_offset; |
936b8834 | 2951 | const char *prefix, *name; |
0c044f0b | 2952 | |
3e632946 JB |
2953 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
2954 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
2955 | type = ocfs2_xattr_get_type(entry); |
2956 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 2957 | |
936b8834 | 2958 | if (prefix) { |
0c044f0b | 2959 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 2960 | bucket_xh(bucket), |
0c044f0b TM |
2961 | i, |
2962 | &block_off, | |
2963 | &new_offset); | |
2964 | if (ret) | |
2965 | break; | |
936b8834 | 2966 | |
51def39f | 2967 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
2968 | new_offset; |
2969 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
2970 | xl->buffer_size, | |
2971 | &xl->result, | |
2972 | prefix, name, | |
2973 | entry->xe_name_len); | |
2974 | if (ret) | |
2975 | break; | |
0c044f0b TM |
2976 | } |
2977 | } | |
2978 | ||
2979 | return ret; | |
2980 | } | |
2981 | ||
2982 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
2983 | struct ocfs2_xattr_tree_root *xt, | |
2984 | char *buffer, | |
2985 | size_t buffer_size) | |
2986 | { | |
2987 | struct ocfs2_extent_list *el = &xt->xt_list; | |
2988 | int ret = 0; | |
2989 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
2990 | u64 p_blkno = 0; | |
2991 | struct ocfs2_xattr_tree_list xl = { | |
2992 | .buffer = buffer, | |
2993 | .buffer_size = buffer_size, | |
936b8834 | 2994 | .result = 0, |
0c044f0b TM |
2995 | }; |
2996 | ||
2997 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2998 | return 0; | |
2999 | ||
3000 | while (name_hash > 0) { | |
3001 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3002 | &e_cpos, &num_clusters, el); | |
3003 | if (ret) { | |
3004 | mlog_errno(ret); | |
3005 | goto out; | |
3006 | } | |
3007 | ||
3008 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
3009 | ocfs2_list_xattr_bucket, | |
3010 | &xl); | |
3011 | if (ret) { | |
3012 | mlog_errno(ret); | |
3013 | goto out; | |
3014 | } | |
3015 | ||
3016 | if (e_cpos == 0) | |
3017 | break; | |
3018 | ||
3019 | name_hash = e_cpos - 1; | |
3020 | } | |
3021 | ||
936b8834 | 3022 | ret = xl.result; |
0c044f0b TM |
3023 | out: |
3024 | return ret; | |
3025 | } | |
01225596 TM |
3026 | |
3027 | static int cmp_xe(const void *a, const void *b) | |
3028 | { | |
3029 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3030 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3031 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3032 | ||
3033 | if (l_hash > r_hash) | |
3034 | return 1; | |
3035 | if (l_hash < r_hash) | |
3036 | return -1; | |
3037 | return 0; | |
3038 | } | |
3039 | ||
3040 | static void swap_xe(void *a, void *b, int size) | |
3041 | { | |
3042 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3043 | ||
3044 | tmp = *l; | |
3045 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3046 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3047 | } | |
3048 | ||
3049 | /* | |
3050 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3051 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3052 | * The header goes at the start of the bucket, and the names+values are |
3053 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3054 | * Note: we need to sort the entries since they are not saved in order |
3055 | * in the ocfs2_xattr_block. | |
3056 | */ | |
3057 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3058 | struct buffer_head *xb_bh, | |
178eeac3 | 3059 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3060 | { |
3061 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3062 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3063 | u16 offset, size, off_change; |
3064 | struct ocfs2_xattr_entry *xe; | |
3065 | struct ocfs2_xattr_block *xb = | |
3066 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3067 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3068 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3069 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3070 | char *src = xb_bh->b_data; |
3071 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3072 | |
3073 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3074 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3075 | (unsigned long long)bucket_blkno(bucket)); |
3076 | ||
3077 | for (i = 0; i < blks; i++) | |
3078 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3079 | |
01225596 TM |
3080 | /* |
3081 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3082 | * there is a offset change corresponding to the change of | |
3083 | * ocfs2_xattr_header's position. | |
3084 | */ | |
3085 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3086 | xe = &xb_xh->xh_entries[count - 1]; | |
3087 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3088 | size = blocksize - offset; | |
3089 | ||
3090 | /* copy all the names and values. */ | |
01225596 TM |
3091 | memcpy(target + offset, src + offset, size); |
3092 | ||
3093 | /* Init new header now. */ | |
3094 | xh->xh_count = xb_xh->xh_count; | |
3095 | xh->xh_num_buckets = cpu_to_le16(1); | |
3096 | xh->xh_name_value_len = cpu_to_le16(size); | |
3097 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3098 | ||
3099 | /* copy all the entries. */ | |
178eeac3 | 3100 | target = bucket_block(bucket, 0); |
01225596 TM |
3101 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3102 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3103 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3104 | ||
3105 | /* Change the xe offset for all the xe because of the move. */ | |
3106 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3107 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3108 | for (i = 0; i < count; i++) | |
3109 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3110 | ||
3111 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3112 | offset, size, off_change); | |
3113 | ||
3114 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3115 | cmp_xe, swap_xe); | |
3116 | } | |
3117 | ||
3118 | /* | |
3119 | * After we move xattr from block to index btree, we have to | |
3120 | * update ocfs2_xattr_search to the new xe and base. | |
3121 | * | |
3122 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3123 | * While if the entry is in index b-tree, "bucket" indicates the | |
3124 | * real place of the xattr. | |
3125 | */ | |
178eeac3 JB |
3126 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3127 | struct ocfs2_xattr_search *xs, | |
3128 | struct buffer_head *old_bh) | |
01225596 | 3129 | { |
01225596 TM |
3130 | char *buf = old_bh->b_data; |
3131 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3132 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3133 | int i; |
01225596 | 3134 | |
ba937127 | 3135 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3136 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3137 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3138 | ||
178eeac3 JB |
3139 | if (xs->not_found) |
3140 | return; | |
01225596 | 3141 | |
178eeac3 JB |
3142 | i = xs->here - old_xh->xh_entries; |
3143 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3144 | } |
3145 | ||
3146 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3147 | struct ocfs2_xattr_search *xs, |
3148 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3149 | { |
85db90e7 | 3150 | int ret; |
01225596 TM |
3151 | u32 bit_off, len; |
3152 | u64 blkno; | |
85db90e7 | 3153 | handle_t *handle = ctxt->handle; |
01225596 TM |
3154 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3155 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3156 | struct buffer_head *xb_bh = xs->xattr_bh; |
3157 | struct ocfs2_xattr_block *xb = | |
3158 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3159 | struct ocfs2_xattr_tree_root *xr; | |
3160 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3161 | |
3162 | mlog(0, "create xattr index block for %llu\n", | |
3163 | (unsigned long long)xb_bh->b_blocknr); | |
3164 | ||
3165 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3166 | BUG_ON(!xs->bucket); |
01225596 | 3167 | |
01225596 TM |
3168 | /* |
3169 | * XXX: | |
3170 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3171 | * if performance becomes a problem later. | |
3172 | */ | |
3173 | down_write(&oi->ip_alloc_sem); | |
3174 | ||
01225596 TM |
3175 | ret = ocfs2_journal_access(handle, inode, xb_bh, |
3176 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3177 | if (ret) { | |
3178 | mlog_errno(ret); | |
85db90e7 | 3179 | goto out; |
01225596 TM |
3180 | } |
3181 | ||
78f30c31 TM |
3182 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3183 | 1, 1, &bit_off, &len); | |
01225596 TM |
3184 | if (ret) { |
3185 | mlog_errno(ret); | |
85db90e7 | 3186 | goto out; |
01225596 TM |
3187 | } |
3188 | ||
3189 | /* | |
3190 | * The bucket may spread in many blocks, and | |
3191 | * we will only touch the 1st block and the last block | |
3192 | * in the whole bucket(one for entry and one for data). | |
3193 | */ | |
3194 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3195 | ||
de29c085 MF |
3196 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3197 | (unsigned long long)blkno); | |
01225596 | 3198 | |
178eeac3 JB |
3199 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3200 | if (ret) { | |
01225596 | 3201 | mlog_errno(ret); |
85db90e7 | 3202 | goto out; |
01225596 TM |
3203 | } |
3204 | ||
178eeac3 JB |
3205 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3206 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3207 | if (ret) { |
3208 | mlog_errno(ret); | |
85db90e7 | 3209 | goto out; |
01225596 TM |
3210 | } |
3211 | ||
178eeac3 JB |
3212 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3213 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3214 | |
178eeac3 | 3215 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3216 | |
3217 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3218 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3219 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3220 | ||
3221 | xr = &xb->xb_attrs.xb_root; | |
3222 | xr->xt_clusters = cpu_to_le32(1); | |
3223 | xr->xt_last_eb_blk = 0; | |
3224 | xr->xt_list.l_tree_depth = 0; | |
3225 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3226 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3227 | ||
3228 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3229 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3230 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3231 | ||
3232 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3233 | ||
85db90e7 | 3234 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3235 | |
85db90e7 | 3236 | out: |
01225596 TM |
3237 | up_write(&oi->ip_alloc_sem); |
3238 | ||
01225596 TM |
3239 | return ret; |
3240 | } | |
3241 | ||
3242 | static int cmp_xe_offset(const void *a, const void *b) | |
3243 | { | |
3244 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3245 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3246 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3247 | ||
3248 | if (l_name_offset < r_name_offset) | |
3249 | return 1; | |
3250 | if (l_name_offset > r_name_offset) | |
3251 | return -1; | |
3252 | return 0; | |
3253 | } | |
3254 | ||
3255 | /* | |
3256 | * defrag a xattr bucket if we find that the bucket has some | |
3257 | * holes beteen name/value pairs. | |
3258 | * We will move all the name/value pairs to the end of the bucket | |
3259 | * so that we can spare some space for insertion. | |
3260 | */ | |
3261 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3262 | handle_t *handle, |
01225596 TM |
3263 | struct ocfs2_xattr_bucket *bucket) |
3264 | { | |
3265 | int ret, i; | |
3266 | size_t end, offset, len, value_len; | |
3267 | struct ocfs2_xattr_header *xh; | |
3268 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3269 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3270 | u16 xh_free_start; |
01225596 | 3271 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3272 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3273 | |
3274 | /* | |
3275 | * In order to make the operation more efficient and generic, | |
3276 | * we copy all the blocks into a contiguous memory and do the | |
3277 | * defragment there, so if anything is error, we will not touch | |
3278 | * the real block. | |
3279 | */ | |
3280 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3281 | if (!bucket_buf) { | |
3282 | ret = -EIO; | |
3283 | goto out; | |
3284 | } | |
3285 | ||
3286 | buf = bucket_buf; | |
1c32a2fd TM |
3287 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3288 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3289 | |
1c32a2fd | 3290 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3291 | OCFS2_JOURNAL_ACCESS_WRITE); |
3292 | if (ret < 0) { | |
3293 | mlog_errno(ret); | |
85db90e7 | 3294 | goto out; |
01225596 TM |
3295 | } |
3296 | ||
3297 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3298 | entries = (char *)xh->xh_entries; | |
3299 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3300 | ||
3301 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3302 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3303 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3304 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3305 | |
3306 | /* | |
3307 | * sort all the entries by their offset. | |
3308 | * the largest will be the first, so that we can | |
3309 | * move them to the end one by one. | |
3310 | */ | |
3311 | sort(entries, le16_to_cpu(xh->xh_count), | |
3312 | sizeof(struct ocfs2_xattr_entry), | |
3313 | cmp_xe_offset, swap_xe); | |
3314 | ||
3315 | /* Move all name/values to the end of the bucket. */ | |
3316 | xe = xh->xh_entries; | |
3317 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3318 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3319 | offset = le16_to_cpu(xe->xe_name_offset); | |
3320 | if (ocfs2_xattr_is_local(xe)) | |
3321 | value_len = OCFS2_XATTR_SIZE( | |
3322 | le64_to_cpu(xe->xe_value_size)); | |
3323 | else | |
3324 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3325 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3326 | ||
3327 | /* | |
3328 | * We must make sure that the name/value pair | |
3329 | * exist in the same block. So adjust end to | |
3330 | * the previous block end if needed. | |
3331 | */ | |
3332 | if (((end - len) / blocksize != | |
3333 | (end - 1) / blocksize)) | |
3334 | end = end - end % blocksize; | |
3335 | ||
3336 | if (end > offset + len) { | |
3337 | memmove(bucket_buf + end - len, | |
3338 | bucket_buf + offset, len); | |
3339 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3340 | } | |
3341 | ||
3342 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3343 | "bucket %llu\n", (unsigned long long)blkno); | |
3344 | ||
3345 | end -= len; | |
3346 | } | |
3347 | ||
3348 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3349 | "bucket %llu\n", (unsigned long long)blkno); | |
3350 | ||
3351 | if (xh_free_start == end) | |
85db90e7 | 3352 | goto out; |
01225596 TM |
3353 | |
3354 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3355 | xh->xh_free_start = cpu_to_le16(end); | |
3356 | ||
3357 | /* sort the entries by their name_hash. */ | |
3358 | sort(entries, le16_to_cpu(xh->xh_count), | |
3359 | sizeof(struct ocfs2_xattr_entry), | |
3360 | cmp_xe, swap_xe); | |
3361 | ||
3362 | buf = bucket_buf; | |
1c32a2fd TM |
3363 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3364 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3365 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3366 | |
01225596 | 3367 | out: |
01225596 TM |
3368 | kfree(bucket_buf); |
3369 | return ret; | |
3370 | } | |
3371 | ||
3372 | /* | |
3373 | * Move half nums of the xattr bucket in the previous cluster to this new | |
3374 | * cluster. We only touch the last cluster of the previous extend record. | |
3375 | * | |
3376 | * first_bh is the first buffer_head of a series of bucket in the same | |
3377 | * extent rec and header_bh is the header of one bucket in this cluster. | |
3378 | * They will be updated if we move the data header_bh contains to the new | |
3379 | * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. | |
3380 | */ | |
3381 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3382 | handle_t *handle, | |
3383 | struct buffer_head **first_bh, | |
3384 | struct buffer_head **header_bh, | |
3385 | u64 new_blkno, | |
3386 | u64 prev_blkno, | |
3387 | u32 num_clusters, | |
3388 | u32 *first_hash) | |
3389 | { | |
3390 | int i, ret, credits; | |
3391 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3392 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3393 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3394 | int blocksize = inode->i_sb->s_blocksize; | |
3395 | struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; | |
3396 | struct ocfs2_xattr_header *new_xh; | |
3397 | struct ocfs2_xattr_header *xh = | |
3398 | (struct ocfs2_xattr_header *)((*first_bh)->b_data); | |
3399 | ||
3400 | BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); | |
3401 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); | |
3402 | ||
3403 | prev_bh = *first_bh; | |
3404 | get_bh(prev_bh); | |
3405 | xh = (struct ocfs2_xattr_header *)prev_bh->b_data; | |
3406 | ||
3407 | prev_blkno += (num_clusters - 1) * bpc + bpc / 2; | |
3408 | ||
3409 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", | |
de29c085 | 3410 | (unsigned long long)prev_blkno, (unsigned long long)new_blkno); |
01225596 TM |
3411 | |
3412 | /* | |
3413 | * We need to update the 1st half of the new cluster and | |
3414 | * 1 more for the update of the 1st bucket of the previous | |
3415 | * extent record. | |
3416 | */ | |
85db90e7 | 3417 | credits = bpc / 2 + 1 + handle->h_buffer_credits; |
01225596 TM |
3418 | ret = ocfs2_extend_trans(handle, credits); |
3419 | if (ret) { | |
3420 | mlog_errno(ret); | |
3421 | goto out; | |
3422 | } | |
3423 | ||
3424 | ret = ocfs2_journal_access(handle, inode, prev_bh, | |
3425 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3426 | if (ret) { | |
3427 | mlog_errno(ret); | |
3428 | goto out; | |
3429 | } | |
3430 | ||
3431 | for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { | |
3432 | old_bh = new_bh = NULL; | |
3433 | new_bh = sb_getblk(inode->i_sb, new_blkno); | |
3434 | if (!new_bh) { | |
3435 | ret = -EIO; | |
3436 | mlog_errno(ret); | |
3437 | goto out; | |
3438 | } | |
3439 | ||
3440 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
3441 | ||
3442 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
3443 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3444 | if (ret < 0) { | |
3445 | mlog_errno(ret); | |
3446 | brelse(new_bh); | |
3447 | goto out; | |
3448 | } | |
3449 | ||
0fcaa56a | 3450 | ret = ocfs2_read_block(inode, prev_blkno, &old_bh); |
01225596 TM |
3451 | if (ret < 0) { |
3452 | mlog_errno(ret); | |
3453 | brelse(new_bh); | |
3454 | goto out; | |
3455 | } | |
3456 | ||
3457 | memcpy(new_bh->b_data, old_bh->b_data, blocksize); | |
3458 | ||
3459 | if (i == 0) { | |
3460 | new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; | |
3461 | new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); | |
3462 | ||
3463 | if (first_hash) | |
3464 | *first_hash = le32_to_cpu( | |
3465 | new_xh->xh_entries[0].xe_name_hash); | |
3466 | new_first_bh = new_bh; | |
3467 | get_bh(new_first_bh); | |
3468 | } | |
3469 | ||
3470 | ocfs2_journal_dirty(handle, new_bh); | |
3471 | ||
3472 | if (*header_bh == old_bh) { | |
3473 | brelse(*header_bh); | |
3474 | *header_bh = new_bh; | |
3475 | get_bh(*header_bh); | |
3476 | ||
3477 | brelse(*first_bh); | |
3478 | *first_bh = new_first_bh; | |
3479 | get_bh(*first_bh); | |
3480 | } | |
3481 | brelse(new_bh); | |
3482 | brelse(old_bh); | |
3483 | } | |
3484 | ||
3485 | le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); | |
3486 | ||
3487 | ocfs2_journal_dirty(handle, prev_bh); | |
3488 | out: | |
3489 | brelse(prev_bh); | |
3490 | brelse(new_first_bh); | |
3491 | return ret; | |
3492 | } | |
3493 | ||
01225596 | 3494 | /* |
80bcaf34 TM |
3495 | * Find the suitable pos when we divide a bucket into 2. |
3496 | * We have to make sure the xattrs with the same hash value exist | |
3497 | * in the same bucket. | |
3498 | * | |
3499 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3500 | * place where the hash value changes. Try to find the most even split. | |
3501 | * The most common case is that all entries have different hash values, | |
3502 | * and the first check we make will find a place to split. | |
3503 | */ | |
3504 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3505 | { | |
3506 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3507 | int count = le16_to_cpu(xh->xh_count); | |
3508 | int delta, middle = count / 2; | |
3509 | ||
3510 | /* | |
3511 | * We start at the middle. Each step gets farther away in both | |
3512 | * directions. We therefore hit the change in hash value | |
3513 | * nearest to the middle. Note that this loop does not execute for | |
3514 | * count < 2. | |
3515 | */ | |
3516 | for (delta = 0; delta < middle; delta++) { | |
3517 | /* Let's check delta earlier than middle */ | |
3518 | if (cmp_xe(&entries[middle - delta - 1], | |
3519 | &entries[middle - delta])) | |
3520 | return middle - delta; | |
3521 | ||
3522 | /* For even counts, don't walk off the end */ | |
3523 | if ((middle + delta + 1) == count) | |
3524 | continue; | |
3525 | ||
3526 | /* Now try delta past middle */ | |
3527 | if (cmp_xe(&entries[middle + delta], | |
3528 | &entries[middle + delta + 1])) | |
3529 | return middle + delta + 1; | |
3530 | } | |
3531 | ||
3532 | /* Every entry had the same hash */ | |
3533 | return count; | |
3534 | } | |
3535 | ||
3536 | /* | |
3537 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3538 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3539 | * |
3540 | * Normally half of the xattrs will be moved. But we have to make | |
3541 | * sure that the xattrs with the same hash value are stored in the | |
3542 | * same bucket. If all the xattrs in this bucket have the same hash | |
3543 | * value, the new bucket will be initialized as an empty one and the | |
3544 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3545 | */ |
80bcaf34 TM |
3546 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3547 | handle_t *handle, | |
3548 | u64 blk, | |
3549 | u64 new_blk, | |
3550 | u32 *first_hash, | |
3551 | int new_bucket_head) | |
01225596 TM |
3552 | { |
3553 | int ret, i; | |
80bcaf34 | 3554 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3555 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3556 | struct ocfs2_xattr_header *xh; |
3557 | struct ocfs2_xattr_entry *xe; | |
3558 | int blocksize = inode->i_sb->s_blocksize; | |
3559 | ||
80bcaf34 | 3560 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3561 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3562 | |
ba937127 JB |
3563 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3564 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3565 | if (!s_bucket || !t_bucket) { | |
3566 | ret = -ENOMEM; | |
3567 | mlog_errno(ret); | |
3568 | goto out; | |
3569 | } | |
01225596 | 3570 | |
ba937127 | 3571 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3572 | if (ret) { |
3573 | mlog_errno(ret); | |
3574 | goto out; | |
3575 | } | |
3576 | ||
ba937127 | 3577 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3578 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3579 | if (ret) { |
3580 | mlog_errno(ret); | |
3581 | goto out; | |
3582 | } | |
3583 | ||
784b816a JB |
3584 | /* |
3585 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3586 | * there's no need to read it. | |
3587 | */ | |
ba937127 | 3588 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3589 | if (ret) { |
3590 | mlog_errno(ret); | |
3591 | goto out; | |
3592 | } | |
3593 | ||
ba937127 | 3594 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3595 | new_bucket_head ? |
3596 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3597 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3598 | if (ret) { | |
3599 | mlog_errno(ret); | |
3600 | goto out; | |
01225596 TM |
3601 | } |
3602 | ||
ba937127 | 3603 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3604 | count = le16_to_cpu(xh->xh_count); |
3605 | start = ocfs2_xattr_find_divide_pos(xh); | |
3606 | ||
3607 | if (start == count) { | |
3608 | xe = &xh->xh_entries[start-1]; | |
3609 | ||
3610 | /* | |
3611 | * initialized a new empty bucket here. | |
3612 | * The hash value is set as one larger than | |
3613 | * that of the last entry in the previous bucket. | |
3614 | */ | |
ba937127 JB |
3615 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3616 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3617 | |
ba937127 | 3618 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3619 | xh->xh_free_start = cpu_to_le16(blocksize); |
3620 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3621 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3622 | ||
3623 | goto set_num_buckets; | |
3624 | } | |
3625 | ||
01225596 | 3626 | /* copy the whole bucket to the new first. */ |
ba937127 | 3627 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3628 | |
3629 | /* update the new bucket. */ | |
ba937127 | 3630 | xh = bucket_xh(t_bucket); |
01225596 TM |
3631 | |
3632 | /* | |
3633 | * Calculate the total name/value len and xh_free_start for | |
3634 | * the old bucket first. | |
3635 | */ | |
3636 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3637 | name_value_len = 0; | |
3638 | for (i = 0; i < start; i++) { | |
3639 | xe = &xh->xh_entries[i]; | |
3640 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3641 | if (ocfs2_xattr_is_local(xe)) | |
3642 | xe_len += | |
3643 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3644 | else | |
3645 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3646 | name_value_len += xe_len; | |
3647 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3648 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3649 | } | |
3650 | ||
3651 | /* | |
3652 | * Now begin the modification to the new bucket. | |
3653 | * | |
3654 | * In the new bucket, We just move the xattr entry to the beginning | |
3655 | * and don't touch the name/value. So there will be some holes in the | |
3656 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3657 | * called. | |
3658 | */ | |
3659 | xe = &xh->xh_entries[start]; | |
3660 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3661 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3662 | (int)((char *)xe - (char *)xh), |
3663 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3664 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3665 | xe = &xh->xh_entries[count - start]; | |
3666 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3667 | memset((char *)xe, 0, len); | |
3668 | ||
3669 | le16_add_cpu(&xh->xh_count, -start); | |
3670 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3671 | ||
3672 | /* Calculate xh_free_start for the new bucket. */ | |
3673 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3674 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3675 | xe = &xh->xh_entries[i]; | |
3676 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3677 | if (ocfs2_xattr_is_local(xe)) | |
3678 | xe_len += | |
3679 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3680 | else | |
3681 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3682 | if (le16_to_cpu(xe->xe_name_offset) < | |
3683 | le16_to_cpu(xh->xh_free_start)) | |
3684 | xh->xh_free_start = xe->xe_name_offset; | |
3685 | } | |
3686 | ||
80bcaf34 | 3687 | set_num_buckets: |
01225596 TM |
3688 | /* set xh->xh_num_buckets for the new xh. */ |
3689 | if (new_bucket_head) | |
3690 | xh->xh_num_buckets = cpu_to_le16(1); | |
3691 | else | |
3692 | xh->xh_num_buckets = 0; | |
3693 | ||
ba937127 | 3694 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3695 | |
3696 | /* store the first_hash of the new bucket. */ | |
3697 | if (first_hash) | |
3698 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3699 | ||
3700 | /* | |
80bcaf34 TM |
3701 | * Now only update the 1st block of the old bucket. If we |
3702 | * just added a new empty bucket, there is no need to modify | |
3703 | * it. | |
01225596 | 3704 | */ |
80bcaf34 TM |
3705 | if (start == count) |
3706 | goto out; | |
3707 | ||
ba937127 | 3708 | xh = bucket_xh(s_bucket); |
01225596 TM |
3709 | memset(&xh->xh_entries[start], 0, |
3710 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3711 | xh->xh_count = cpu_to_le16(start); | |
3712 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3713 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3714 | ||
ba937127 | 3715 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3716 | |
3717 | out: | |
ba937127 JB |
3718 | ocfs2_xattr_bucket_free(s_bucket); |
3719 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3720 | |
3721 | return ret; | |
3722 | } | |
3723 | ||
3724 | /* | |
3725 | * Copy xattr from one bucket to another bucket. | |
3726 | * | |
3727 | * The caller must make sure that the journal transaction | |
3728 | * has enough space for journaling. | |
3729 | */ | |
3730 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3731 | handle_t *handle, | |
3732 | u64 s_blkno, | |
3733 | u64 t_blkno, | |
3734 | int t_is_new) | |
3735 | { | |
4980c6da | 3736 | int ret; |
ba937127 | 3737 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3738 | |
3739 | BUG_ON(s_blkno == t_blkno); | |
3740 | ||
3741 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3742 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3743 | t_is_new); | |
01225596 | 3744 | |
ba937127 JB |
3745 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3746 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3747 | if (!s_bucket || !t_bucket) { | |
3748 | ret = -ENOMEM; | |
3749 | mlog_errno(ret); | |
3750 | goto out; | |
3751 | } | |
3752 | ||
3753 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); | |
01225596 TM |
3754 | if (ret) |
3755 | goto out; | |
3756 | ||
784b816a JB |
3757 | /* |
3758 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3759 | * there's no need to read it. | |
3760 | */ | |
ba937127 | 3761 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3762 | if (ret) |
3763 | goto out; | |
3764 | ||
ba937127 | 3765 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3766 | t_is_new ? |
3767 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3768 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3769 | if (ret) | |
3770 | goto out; | |
01225596 | 3771 | |
ba937127 JB |
3772 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
3773 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
3774 | |
3775 | out: | |
ba937127 JB |
3776 | ocfs2_xattr_bucket_free(t_bucket); |
3777 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
3778 | |
3779 | return ret; | |
3780 | } | |
3781 | ||
3782 | /* | |
3783 | * Copy one xattr cluster from src_blk to to_blk. | |
3784 | * The to_blk will become the first bucket header of the cluster, so its | |
3785 | * xh_num_buckets will be initialized as the bucket num in the cluster. | |
3786 | */ | |
3787 | static int ocfs2_cp_xattr_cluster(struct inode *inode, | |
3788 | handle_t *handle, | |
3789 | struct buffer_head *first_bh, | |
3790 | u64 src_blk, | |
3791 | u64 to_blk, | |
3792 | u32 *first_hash) | |
3793 | { | |
3794 | int i, ret, credits; | |
3795 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3796 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3797 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3798 | struct buffer_head *bh = NULL; | |
3799 | struct ocfs2_xattr_header *xh; | |
3800 | u64 to_blk_start = to_blk; | |
3801 | ||
de29c085 MF |
3802 | mlog(0, "cp xattrs from cluster %llu to %llu\n", |
3803 | (unsigned long long)src_blk, (unsigned long long)to_blk); | |
01225596 TM |
3804 | |
3805 | /* | |
3806 | * We need to update the new cluster and 1 more for the update of | |
3807 | * the 1st bucket of the previous extent rec. | |
3808 | */ | |
85db90e7 | 3809 | credits = bpc + 1 + handle->h_buffer_credits; |
01225596 TM |
3810 | ret = ocfs2_extend_trans(handle, credits); |
3811 | if (ret) { | |
3812 | mlog_errno(ret); | |
3813 | goto out; | |
3814 | } | |
3815 | ||
3816 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3817 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3818 | if (ret) { | |
3819 | mlog_errno(ret); | |
3820 | goto out; | |
3821 | } | |
3822 | ||
3823 | for (i = 0; i < num_buckets; i++) { | |
3824 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
3825 | src_blk, to_blk, 1); | |
3826 | if (ret) { | |
3827 | mlog_errno(ret); | |
3828 | goto out; | |
3829 | } | |
3830 | ||
3831 | src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3832 | to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3833 | } | |
3834 | ||
3835 | /* update the old bucket header. */ | |
3836 | xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3837 | le16_add_cpu(&xh->xh_num_buckets, -num_buckets); | |
3838 | ||
3839 | ocfs2_journal_dirty(handle, first_bh); | |
3840 | ||
3841 | /* update the new bucket header. */ | |
0fcaa56a | 3842 | ret = ocfs2_read_block(inode, to_blk_start, &bh); |
01225596 TM |
3843 | if (ret < 0) { |
3844 | mlog_errno(ret); | |
3845 | goto out; | |
3846 | } | |
3847 | ||
3848 | ret = ocfs2_journal_access(handle, inode, bh, | |
3849 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3850 | if (ret) { | |
3851 | mlog_errno(ret); | |
3852 | goto out; | |
3853 | } | |
3854 | ||
3855 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
3856 | xh->xh_num_buckets = cpu_to_le16(num_buckets); | |
3857 | ||
3858 | ocfs2_journal_dirty(handle, bh); | |
3859 | ||
3860 | if (first_hash) | |
3861 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3862 | out: | |
3863 | brelse(bh); | |
3864 | return ret; | |
3865 | } | |
3866 | ||
3867 | /* | |
80bcaf34 | 3868 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
3869 | * This function should only be called when bucket size == cluster size. |
3870 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
3871 | */ | |
80bcaf34 TM |
3872 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
3873 | handle_t *handle, | |
3874 | u64 prev_blk, | |
3875 | u64 new_blk, | |
3876 | u32 *first_hash) | |
01225596 TM |
3877 | { |
3878 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 3879 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
3880 | |
3881 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
3882 | ||
3883 | ret = ocfs2_extend_trans(handle, credits); | |
3884 | if (ret) { | |
3885 | mlog_errno(ret); | |
3886 | return ret; | |
3887 | } | |
3888 | ||
3889 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
3890 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
3891 | new_blk, first_hash, 1); | |
01225596 TM |
3892 | } |
3893 | ||
3894 | /* | |
3895 | * Move some xattrs from the old cluster to the new one since they are not | |
3896 | * contiguous in ocfs2 xattr tree. | |
3897 | * | |
3898 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
3899 | * prev_blk to it. v_start will be set as the first name hash value in this | |
3900 | * new cluster so that it can be used as e_cpos during tree insertion and | |
3901 | * don't collide with our original b-tree operations. first_bh and header_bh | |
3902 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
3903 | * to extend the insert bucket. | |
3904 | * | |
3905 | * The problem is how much xattr should we move to the new one and when should | |
3906 | * we update first_bh and header_bh? | |
3907 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
3908 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
3909 | * update the first_bh and header_bh if the insert bucket has been moved | |
3910 | * to the new cluster. | |
3911 | * 2. If cluster_size == bucket_size: | |
3912 | * a) If the previous extent rec has more than one cluster and the insert | |
3913 | * place isn't in the last cluster, copy the entire last cluster to the | |
3914 | * new one. This time, we don't need to upate the first_bh and header_bh | |
3915 | * since they will not be moved into the new cluster. | |
3916 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
3917 | * the new one. And we set the extend flag to zero if the insert place is | |
3918 | * moved into the new allocated cluster since no extend is needed. | |
3919 | */ | |
3920 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
3921 | handle_t *handle, | |
3922 | struct buffer_head **first_bh, | |
3923 | struct buffer_head **header_bh, | |
3924 | u64 new_blk, | |
3925 | u64 prev_blk, | |
3926 | u32 prev_clusters, | |
3927 | u32 *v_start, | |
3928 | int *extend) | |
3929 | { | |
3930 | int ret = 0; | |
3931 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3932 | ||
3933 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
de29c085 MF |
3934 | (unsigned long long)prev_blk, prev_clusters, |
3935 | (unsigned long long)new_blk); | |
01225596 TM |
3936 | |
3937 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) | |
3938 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, | |
3939 | handle, | |
3940 | first_bh, | |
3941 | header_bh, | |
3942 | new_blk, | |
3943 | prev_blk, | |
3944 | prev_clusters, | |
3945 | v_start); | |
3946 | else { | |
3947 | u64 last_blk = prev_blk + bpc * (prev_clusters - 1); | |
3948 | ||
3949 | if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) | |
3950 | ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, | |
3951 | last_blk, new_blk, | |
3952 | v_start); | |
3953 | else { | |
80bcaf34 TM |
3954 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
3955 | last_blk, new_blk, | |
3956 | v_start); | |
01225596 TM |
3957 | |
3958 | if ((*header_bh)->b_blocknr == last_blk && extend) | |
3959 | *extend = 0; | |
3960 | } | |
3961 | } | |
3962 | ||
3963 | return ret; | |
3964 | } | |
3965 | ||
3966 | /* | |
3967 | * Add a new cluster for xattr storage. | |
3968 | * | |
3969 | * If the new cluster is contiguous with the previous one, it will be | |
3970 | * appended to the same extent record, and num_clusters will be updated. | |
3971 | * If not, we will insert a new extent for it and move some xattrs in | |
3972 | * the last cluster into the new allocated one. | |
3973 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
3974 | * lose the benefits of hashing because we'll have to search large leaves. | |
3975 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
3976 | * if it's bigger). | |
3977 | * | |
3978 | * first_bh is the first block of the previous extent rec and header_bh | |
3979 | * indicates the bucket we will insert the new xattrs. They will be updated | |
3980 | * when the header_bh is moved into the new cluster. | |
3981 | */ | |
3982 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
3983 | struct buffer_head *root_bh, | |
3984 | struct buffer_head **first_bh, | |
3985 | struct buffer_head **header_bh, | |
3986 | u32 *num_clusters, | |
3987 | u32 prev_cpos, | |
3988 | u64 prev_blkno, | |
78f30c31 TM |
3989 | int *extend, |
3990 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3991 | { |
85db90e7 | 3992 | int ret; |
01225596 TM |
3993 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
3994 | u32 prev_clusters = *num_clusters; | |
3995 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
3996 | u64 block; | |
85db90e7 | 3997 | handle_t *handle = ctxt->handle; |
01225596 | 3998 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 3999 | struct ocfs2_extent_tree et; |
01225596 TM |
4000 | |
4001 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4002 | "previous xattr blkno = %llu\n", | |
4003 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
de29c085 | 4004 | prev_cpos, (unsigned long long)prev_blkno); |
01225596 | 4005 | |
8d6220d6 | 4006 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c | 4007 | |
01225596 TM |
4008 | ret = ocfs2_journal_access(handle, inode, root_bh, |
4009 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4010 | if (ret < 0) { | |
4011 | mlog_errno(ret); | |
4012 | goto leave; | |
4013 | } | |
4014 | ||
78f30c31 | 4015 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4016 | clusters_to_add, &bit_off, &num_bits); |
4017 | if (ret < 0) { | |
4018 | if (ret != -ENOSPC) | |
4019 | mlog_errno(ret); | |
4020 | goto leave; | |
4021 | } | |
4022 | ||
4023 | BUG_ON(num_bits > clusters_to_add); | |
4024 | ||
4025 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4026 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4027 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4028 | ||
4029 | if (prev_blkno + prev_clusters * bpc == block && | |
4030 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= | |
4031 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4032 | /* | |
4033 | * If this cluster is contiguous with the old one and | |
4034 | * adding this new cluster, we don't surpass the limit of | |
4035 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4036 | * initialized and used like other buckets in the previous | |
4037 | * cluster. | |
4038 | * So add it as a contiguous one. The caller will handle | |
4039 | * its init process. | |
4040 | */ | |
4041 | v_start = prev_cpos + prev_clusters; | |
4042 | *num_clusters = prev_clusters + num_bits; | |
4043 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4044 | num_bits); | |
4045 | } else { | |
4046 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4047 | handle, | |
4048 | first_bh, | |
4049 | header_bh, | |
4050 | block, | |
4051 | prev_blkno, | |
4052 | prev_clusters, | |
4053 | &v_start, | |
4054 | extend); | |
4055 | if (ret) { | |
4056 | mlog_errno(ret); | |
4057 | goto leave; | |
4058 | } | |
4059 | } | |
4060 | ||
4061 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4062 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c | 4063 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
78f30c31 | 4064 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4065 | if (ret < 0) { |
4066 | mlog_errno(ret); | |
4067 | goto leave; | |
4068 | } | |
4069 | ||
4070 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4071 | if (ret < 0) |
01225596 | 4072 | mlog_errno(ret); |
01225596 TM |
4073 | |
4074 | leave: | |
01225596 TM |
4075 | return ret; |
4076 | } | |
4077 | ||
4078 | /* | |
4079 | * Extend a new xattr bucket and move xattrs to the end one by one until | |
4080 | * We meet with start_bh. Only move half of the xattrs to the bucket after it. | |
4081 | */ | |
4082 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4083 | handle_t *handle, |
01225596 TM |
4084 | struct buffer_head *first_bh, |
4085 | struct buffer_head *start_bh, | |
4086 | u32 num_clusters) | |
4087 | { | |
4088 | int ret, credits; | |
4089 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4090 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4091 | u64 start_blk = start_bh->b_blocknr, end_blk; | |
4092 | u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); | |
01225596 TM |
4093 | struct ocfs2_xattr_header *first_xh = |
4094 | (struct ocfs2_xattr_header *)first_bh->b_data; | |
4095 | u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); | |
4096 | ||
4097 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
de29c085 | 4098 | "from %llu, len = %u\n", (unsigned long long)start_blk, |
01225596 TM |
4099 | (unsigned long long)first_bh->b_blocknr, num_clusters); |
4100 | ||
4101 | BUG_ON(bucket >= num_buckets); | |
4102 | ||
4103 | end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; | |
4104 | ||
4105 | /* | |
4106 | * We will touch all the buckets after the start_bh(include it). | |
1224be02 | 4107 | * Then we add one more bucket. |
01225596 | 4108 | */ |
85db90e7 TM |
4109 | credits = end_blk - start_blk + 3 * blk_per_bucket + 1 + |
4110 | handle->h_buffer_credits; | |
4111 | ret = ocfs2_extend_trans(handle, credits); | |
4112 | if (ret) { | |
01225596 TM |
4113 | mlog_errno(ret); |
4114 | goto out; | |
4115 | } | |
4116 | ||
4117 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
4118 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4119 | if (ret) { | |
4120 | mlog_errno(ret); | |
85db90e7 | 4121 | goto out; |
01225596 TM |
4122 | } |
4123 | ||
4124 | while (end_blk != start_blk) { | |
4125 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, | |
4126 | end_blk + blk_per_bucket, 0); | |
4127 | if (ret) | |
85db90e7 | 4128 | goto out; |
01225596 TM |
4129 | end_blk -= blk_per_bucket; |
4130 | } | |
4131 | ||
4132 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4133 | ret = ocfs2_divide_xattr_bucket(inode, handle, start_blk, |
4134 | start_blk + blk_per_bucket, NULL, 0); | |
01225596 TM |
4135 | |
4136 | le16_add_cpu(&first_xh->xh_num_buckets, 1); | |
4137 | ocfs2_journal_dirty(handle, first_bh); | |
4138 | ||
01225596 TM |
4139 | out: |
4140 | return ret; | |
4141 | } | |
4142 | ||
4143 | /* | |
4144 | * Add new xattr bucket in an extent record and adjust the buckets accordingly. | |
4145 | * xb_bh is the ocfs2_xattr_block. | |
4146 | * We will move all the buckets starting from header_bh to the next place. As | |
4147 | * for this one, half num of its xattrs will be moved to the next one. | |
4148 | * | |
4149 | * We will allocate a new cluster if current cluster is full and adjust | |
4150 | * header_bh and first_bh if the insert place is moved to the new cluster. | |
4151 | */ | |
4152 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4153 | struct buffer_head *xb_bh, | |
78f30c31 TM |
4154 | struct buffer_head *header_bh, |
4155 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4156 | { |
4157 | struct ocfs2_xattr_header *first_xh = NULL; | |
4158 | struct buffer_head *first_bh = NULL; | |
4159 | struct ocfs2_xattr_block *xb = | |
4160 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4161 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4162 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
4163 | struct ocfs2_xattr_header *xh = | |
4164 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4165 | u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4166 | struct super_block *sb = inode->i_sb; | |
4167 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
4168 | int ret, num_buckets, extend = 1; | |
4169 | u64 p_blkno; | |
4170 | u32 e_cpos, num_clusters; | |
4171 | ||
4172 | mlog(0, "Add new xattr bucket starting form %llu\n", | |
4173 | (unsigned long long)header_bh->b_blocknr); | |
4174 | ||
4175 | /* | |
4176 | * Add refrence for header_bh here because it may be | |
4177 | * changed in ocfs2_add_new_xattr_cluster and we need | |
4178 | * to free it in the end. | |
4179 | */ | |
4180 | get_bh(header_bh); | |
4181 | ||
4182 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, | |
4183 | &num_clusters, el); | |
4184 | if (ret) { | |
4185 | mlog_errno(ret); | |
4186 | goto out; | |
4187 | } | |
4188 | ||
0fcaa56a | 4189 | ret = ocfs2_read_block(inode, p_blkno, &first_bh); |
01225596 TM |
4190 | if (ret) { |
4191 | mlog_errno(ret); | |
4192 | goto out; | |
4193 | } | |
4194 | ||
4195 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; | |
4196 | first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
4197 | ||
4198 | if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { | |
4199 | ret = ocfs2_add_new_xattr_cluster(inode, | |
4200 | xb_bh, | |
4201 | &first_bh, | |
4202 | &header_bh, | |
4203 | &num_clusters, | |
4204 | e_cpos, | |
4205 | p_blkno, | |
78f30c31 TM |
4206 | &extend, |
4207 | ctxt); | |
01225596 TM |
4208 | if (ret) { |
4209 | mlog_errno(ret); | |
4210 | goto out; | |
4211 | } | |
4212 | } | |
4213 | ||
4214 | if (extend) | |
4215 | ret = ocfs2_extend_xattr_bucket(inode, | |
85db90e7 | 4216 | ctxt->handle, |
01225596 TM |
4217 | first_bh, |
4218 | header_bh, | |
4219 | num_clusters); | |
4220 | if (ret) | |
4221 | mlog_errno(ret); | |
4222 | out: | |
4223 | brelse(first_bh); | |
4224 | brelse(header_bh); | |
4225 | return ret; | |
4226 | } | |
4227 | ||
4228 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4229 | struct ocfs2_xattr_bucket *bucket, | |
4230 | int offs) | |
4231 | { | |
4232 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4233 | ||
4234 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4235 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4236 | } |
4237 | ||
4238 | /* | |
4239 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4240 | * |
4241 | * Note: "local" indicates the real data's locality. So we can't | |
4242 | * just its bucket locality by its length. | |
4243 | */ | |
4244 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4245 | struct ocfs2_xattr_info *xi, | |
4246 | struct ocfs2_xattr_search *xs, | |
4247 | u32 name_hash, | |
5a095611 | 4248 | int local) |
01225596 TM |
4249 | { |
4250 | struct ocfs2_xattr_entry *last, *xe; | |
4251 | int name_len = strlen(xi->name); | |
4252 | struct ocfs2_xattr_header *xh = xs->header; | |
4253 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4254 | size_t blocksize = inode->i_sb->s_blocksize; | |
4255 | char *val; | |
4256 | size_t offs, size, new_size; | |
4257 | ||
4258 | last = &xh->xh_entries[count]; | |
4259 | if (!xs->not_found) { | |
4260 | xe = xs->here; | |
4261 | offs = le16_to_cpu(xe->xe_name_offset); | |
4262 | if (ocfs2_xattr_is_local(xe)) | |
4263 | size = OCFS2_XATTR_SIZE(name_len) + | |
4264 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4265 | else | |
4266 | size = OCFS2_XATTR_SIZE(name_len) + | |
4267 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4268 | ||
4269 | /* | |
4270 | * If the new value will be stored outside, xi->value has been | |
4271 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4272 | * goes with xi->value_len, so we can set new_size safely here. | |
4273 | * See ocfs2_xattr_set_in_bucket. | |
4274 | */ | |
4275 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4276 | OCFS2_XATTR_SIZE(xi->value_len); | |
4277 | ||
4278 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4279 | if (xi->value) { | |
4280 | if (new_size > size) | |
4281 | goto set_new_name_value; | |
4282 | ||
4283 | /* Now replace the old value with new one. */ | |
4284 | if (local) | |
4285 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4286 | else | |
4287 | xe->xe_value_size = 0; | |
4288 | ||
4289 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4290 | xs->bucket, offs); |
01225596 TM |
4291 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4292 | size - OCFS2_XATTR_SIZE(name_len)); | |
4293 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4294 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4295 | xi->value, xi->value_len); | |
4296 | ||
4297 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4298 | ocfs2_xattr_set_local(xe, local); | |
4299 | return; | |
4300 | } else { | |
5a095611 TM |
4301 | /* |
4302 | * Remove the old entry if there is more than one. | |
4303 | * We don't remove the last entry so that we can | |
4304 | * use it to indicate the hash value of the empty | |
4305 | * bucket. | |
4306 | */ | |
01225596 | 4307 | last -= 1; |
01225596 | 4308 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4309 | if (xh->xh_count) { |
4310 | memmove(xe, xe + 1, | |
4311 | (void *)last - (void *)xe); | |
4312 | memset(last, 0, | |
4313 | sizeof(struct ocfs2_xattr_entry)); | |
4314 | } else | |
4315 | xh->xh_free_start = | |
4316 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4317 | ||
01225596 TM |
4318 | return; |
4319 | } | |
4320 | } else { | |
4321 | /* find a new entry for insert. */ | |
4322 | int low = 0, high = count - 1, tmp; | |
4323 | struct ocfs2_xattr_entry *tmp_xe; | |
4324 | ||
5a095611 | 4325 | while (low <= high && count) { |
01225596 TM |
4326 | tmp = (low + high) / 2; |
4327 | tmp_xe = &xh->xh_entries[tmp]; | |
4328 | ||
4329 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4330 | low = tmp + 1; | |
4331 | else if (name_hash < | |
4332 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4333 | high = tmp - 1; | |
06b240d8 TM |
4334 | else { |
4335 | low = tmp; | |
01225596 | 4336 | break; |
06b240d8 | 4337 | } |
01225596 TM |
4338 | } |
4339 | ||
4340 | xe = &xh->xh_entries[low]; | |
4341 | if (low != count) | |
4342 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4343 | ||
4344 | le16_add_cpu(&xh->xh_count, 1); | |
4345 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4346 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4347 | xe->xe_name_len = name_len; | |
4348 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4349 | } | |
4350 | ||
4351 | set_new_name_value: | |
4352 | /* Insert the new name+value. */ | |
4353 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4354 | ||
4355 | /* | |
4356 | * We must make sure that the name/value pair | |
4357 | * exists in the same block. | |
4358 | */ | |
4359 | offs = le16_to_cpu(xh->xh_free_start); | |
4360 | start = offs - size; | |
4361 | ||
4362 | if (start >> inode->i_sb->s_blocksize_bits != | |
4363 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4364 | offs = offs - offs % blocksize; | |
4365 | xh->xh_free_start = cpu_to_le16(offs); | |
4366 | } | |
4367 | ||
ba937127 | 4368 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4369 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4370 | ||
4371 | memset(val, 0, size); | |
4372 | memcpy(val, xi->name, name_len); | |
4373 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4374 | ||
4375 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4376 | ocfs2_xattr_set_local(xe, local); | |
4377 | xs->here = xe; | |
4378 | le16_add_cpu(&xh->xh_free_start, -size); | |
4379 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4380 | ||
4381 | return; | |
4382 | } | |
4383 | ||
01225596 TM |
4384 | /* |
4385 | * Set the xattr entry in the specified bucket. | |
4386 | * The bucket is indicated by xs->bucket and it should have the enough | |
4387 | * space for the xattr insertion. | |
4388 | */ | |
4389 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4390 | handle_t *handle, |
01225596 TM |
4391 | struct ocfs2_xattr_info *xi, |
4392 | struct ocfs2_xattr_search *xs, | |
4393 | u32 name_hash, | |
5a095611 | 4394 | int local) |
01225596 | 4395 | { |
1224be02 | 4396 | int ret; |
02dbf38d | 4397 | u64 blkno; |
01225596 | 4398 | |
ff1ec20e MF |
4399 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4400 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4401 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4402 | |
ba937127 | 4403 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4404 | blkno = bucket_blkno(xs->bucket); |
4405 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4406 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4407 | if (ret) { |
4408 | mlog_errno(ret); | |
4409 | goto out; | |
4410 | } | |
4411 | } | |
4412 | ||
ba937127 | 4413 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4414 | OCFS2_JOURNAL_ACCESS_WRITE); |
4415 | if (ret < 0) { | |
4416 | mlog_errno(ret); | |
4417 | goto out; | |
01225596 TM |
4418 | } |
4419 | ||
5a095611 | 4420 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4421 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4422 | |
01225596 | 4423 | out: |
01225596 TM |
4424 | return ret; |
4425 | } | |
4426 | ||
4427 | static int ocfs2_xattr_value_update_size(struct inode *inode, | |
85db90e7 | 4428 | handle_t *handle, |
01225596 TM |
4429 | struct buffer_head *xe_bh, |
4430 | struct ocfs2_xattr_entry *xe, | |
4431 | u64 new_size) | |
4432 | { | |
4433 | int ret; | |
01225596 TM |
4434 | |
4435 | ret = ocfs2_journal_access(handle, inode, xe_bh, | |
4436 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4437 | if (ret < 0) { | |
4438 | mlog_errno(ret); | |
85db90e7 | 4439 | goto out; |
01225596 TM |
4440 | } |
4441 | ||
4442 | xe->xe_value_size = cpu_to_le64(new_size); | |
4443 | ||
4444 | ret = ocfs2_journal_dirty(handle, xe_bh); | |
4445 | if (ret < 0) | |
4446 | mlog_errno(ret); | |
4447 | ||
01225596 TM |
4448 | out: |
4449 | return ret; | |
4450 | } | |
4451 | ||
4452 | /* | |
4453 | * Truncate the specified xe_off entry in xattr bucket. | |
4454 | * bucket is indicated by header_bh and len is the new length. | |
4455 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4456 | * | |
4457 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4458 | */ | |
4459 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
4460 | struct buffer_head *header_bh, | |
4461 | int xe_off, | |
78f30c31 TM |
4462 | int len, |
4463 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4464 | { |
4465 | int ret, offset; | |
4466 | u64 value_blk; | |
4467 | struct buffer_head *value_bh = NULL; | |
4468 | struct ocfs2_xattr_value_root *xv; | |
4469 | struct ocfs2_xattr_entry *xe; | |
4470 | struct ocfs2_xattr_header *xh = | |
4471 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4472 | size_t blocksize = inode->i_sb->s_blocksize; | |
4473 | ||
4474 | xe = &xh->xh_entries[xe_off]; | |
4475 | ||
4476 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4477 | ||
4478 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4479 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4480 | ||
4481 | value_blk = offset / blocksize; | |
4482 | ||
4483 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4484 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
4485 | value_blk += header_bh->b_blocknr; | |
4486 | ||
0fcaa56a | 4487 | ret = ocfs2_read_block(inode, value_blk, &value_bh); |
01225596 TM |
4488 | if (ret) { |
4489 | mlog_errno(ret); | |
4490 | goto out; | |
4491 | } | |
4492 | ||
4493 | xv = (struct ocfs2_xattr_value_root *) | |
4494 | (value_bh->b_data + offset % blocksize); | |
4495 | ||
4496 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4497 | xe_off, (unsigned long long)header_bh->b_blocknr, len); | |
78f30c31 | 4498 | ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt); |
01225596 TM |
4499 | if (ret) { |
4500 | mlog_errno(ret); | |
4501 | goto out; | |
4502 | } | |
4503 | ||
85db90e7 TM |
4504 | ret = ocfs2_xattr_value_update_size(inode, ctxt->handle, |
4505 | header_bh, xe, len); | |
01225596 TM |
4506 | if (ret) { |
4507 | mlog_errno(ret); | |
4508 | goto out; | |
4509 | } | |
4510 | ||
4511 | out: | |
4512 | brelse(value_bh); | |
4513 | return ret; | |
4514 | } | |
4515 | ||
4516 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4517 | struct ocfs2_xattr_search *xs, |
4518 | int len, | |
4519 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4520 | { |
4521 | int ret, offset; | |
4522 | struct ocfs2_xattr_entry *xe = xs->here; | |
4523 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4524 | ||
ba937127 | 4525 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4526 | |
4527 | offset = xe - xh->xh_entries; | |
ba937127 | 4528 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket->bu_bhs[0], |
78f30c31 | 4529 | offset, len, ctxt); |
01225596 TM |
4530 | if (ret) |
4531 | mlog_errno(ret); | |
4532 | ||
4533 | return ret; | |
4534 | } | |
4535 | ||
4536 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4537 | handle_t *handle, |
01225596 TM |
4538 | struct ocfs2_xattr_search *xs, |
4539 | char *val, | |
4540 | int value_len) | |
4541 | { | |
4542 | int offset; | |
4543 | struct ocfs2_xattr_value_root *xv; | |
4544 | struct ocfs2_xattr_entry *xe = xs->here; | |
4545 | ||
4546 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4547 | ||
4548 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4549 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4550 | ||
4551 | xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); | |
4552 | ||
85db90e7 TM |
4553 | return __ocfs2_xattr_set_value_outside(inode, handle, |
4554 | xv, val, value_len); | |
01225596 TM |
4555 | } |
4556 | ||
01225596 TM |
4557 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4558 | struct buffer_head *root_bh, | |
4559 | u64 blkno, | |
4560 | u32 cpos, | |
4561 | u32 len) | |
4562 | { | |
4563 | int ret; | |
4564 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4565 | struct inode *tl_inode = osb->osb_tl_inode; | |
4566 | handle_t *handle; | |
4567 | struct ocfs2_xattr_block *xb = | |
4568 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4569 | struct ocfs2_alloc_context *meta_ac = NULL; |
4570 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4571 | struct ocfs2_extent_tree et; |
4572 | ||
8d6220d6 | 4573 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4574 | |
4575 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4576 | ||
4577 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4578 | cpos, len, (unsigned long long)blkno); | |
4579 | ||
4580 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4581 | ||
f99b9b7c | 4582 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4583 | if (ret) { |
4584 | mlog_errno(ret); | |
4585 | return ret; | |
4586 | } | |
4587 | ||
4588 | mutex_lock(&tl_inode->i_mutex); | |
4589 | ||
4590 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4591 | ret = __ocfs2_flush_truncate_log(osb); | |
4592 | if (ret < 0) { | |
4593 | mlog_errno(ret); | |
4594 | goto out; | |
4595 | } | |
4596 | } | |
4597 | ||
4598 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
d3264799 | 4599 | if (IS_ERR(handle)) { |
01225596 TM |
4600 | ret = -ENOMEM; |
4601 | mlog_errno(ret); | |
4602 | goto out; | |
4603 | } | |
4604 | ||
4605 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
4606 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4607 | if (ret) { | |
4608 | mlog_errno(ret); | |
4609 | goto out_commit; | |
4610 | } | |
4611 | ||
f99b9b7c JB |
4612 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4613 | &dealloc); | |
01225596 TM |
4614 | if (ret) { |
4615 | mlog_errno(ret); | |
4616 | goto out_commit; | |
4617 | } | |
4618 | ||
4619 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4620 | ||
4621 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4622 | if (ret) { | |
4623 | mlog_errno(ret); | |
4624 | goto out_commit; | |
4625 | } | |
4626 | ||
4627 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4628 | if (ret) | |
4629 | mlog_errno(ret); | |
4630 | ||
4631 | out_commit: | |
4632 | ocfs2_commit_trans(osb, handle); | |
4633 | out: | |
4634 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4635 | ||
4636 | mutex_unlock(&tl_inode->i_mutex); | |
4637 | ||
4638 | if (meta_ac) | |
4639 | ocfs2_free_alloc_context(meta_ac); | |
4640 | ||
4641 | ocfs2_run_deallocs(osb, &dealloc); | |
4642 | ||
4643 | return ret; | |
4644 | } | |
4645 | ||
01225596 | 4646 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 4647 | handle_t *handle, |
01225596 TM |
4648 | struct ocfs2_xattr_search *xs) |
4649 | { | |
ba937127 | 4650 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4651 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4652 | le16_to_cpu(xh->xh_count) - 1]; | |
4653 | int ret = 0; | |
4654 | ||
ba937127 | 4655 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4656 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4657 | if (ret) { |
4658 | mlog_errno(ret); | |
85db90e7 | 4659 | return; |
01225596 TM |
4660 | } |
4661 | ||
4662 | /* Remove the old entry. */ | |
4663 | memmove(xs->here, xs->here + 1, | |
4664 | (void *)last - (void *)xs->here); | |
4665 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4666 | le16_add_cpu(&xh->xh_count, -1); | |
4667 | ||
ba937127 | 4668 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
4669 | } |
4670 | ||
4671 | /* | |
4672 | * Set the xattr name/value in the bucket specified in xs. | |
4673 | * | |
4674 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4675 | * we divide the whole process into 3 steps: | |
4676 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4677 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4678 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4679 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4680 | * to free the xattr we allocated in set. | |
4681 | */ | |
4682 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4683 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4684 | struct ocfs2_xattr_search *xs, |
4685 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4686 | { |
5a095611 | 4687 | int ret, local = 1; |
01225596 TM |
4688 | size_t value_len; |
4689 | char *val = (char *)xi->value; | |
4690 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4691 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4692 | strlen(xi->name)); | |
01225596 TM |
4693 | |
4694 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4695 | /* | |
4696 | * We need to truncate the xattr storage first. | |
4697 | * | |
4698 | * If both the old and new value are stored to | |
4699 | * outside block, we only need to truncate | |
4700 | * the storage and then set the value outside. | |
4701 | * | |
4702 | * If the new value should be stored within block, | |
4703 | * we should free all the outside block first and | |
4704 | * the modification to the xattr block will be done | |
4705 | * by following steps. | |
4706 | */ | |
4707 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4708 | value_len = xi->value_len; | |
4709 | else | |
4710 | value_len = 0; | |
4711 | ||
4712 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
4713 | value_len, |
4714 | ctxt); | |
01225596 TM |
4715 | if (ret) |
4716 | goto out; | |
4717 | ||
4718 | if (value_len) | |
4719 | goto set_value_outside; | |
4720 | } | |
4721 | ||
4722 | value_len = xi->value_len; | |
4723 | /* So we have to handle the inside block change now. */ | |
4724 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4725 | /* | |
4726 | * If the new value will be stored outside of block, | |
4727 | * initalize a new empty value root and insert it first. | |
4728 | */ | |
4729 | local = 0; | |
4730 | xi->value = &def_xv; | |
4731 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4732 | } | |
4733 | ||
85db90e7 TM |
4734 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
4735 | name_hash, local); | |
01225596 TM |
4736 | if (ret) { |
4737 | mlog_errno(ret); | |
4738 | goto out; | |
4739 | } | |
4740 | ||
5a095611 TM |
4741 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
4742 | goto out; | |
01225596 | 4743 | |
5a095611 TM |
4744 | /* allocate the space now for the outside block storage. */ |
4745 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 4746 | value_len, ctxt); |
5a095611 TM |
4747 | if (ret) { |
4748 | mlog_errno(ret); | |
4749 | ||
4750 | if (xs->not_found) { | |
4751 | /* | |
4752 | * We can't allocate enough clusters for outside | |
4753 | * storage and we have allocated xattr already, | |
4754 | * so need to remove it. | |
4755 | */ | |
85db90e7 | 4756 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 4757 | } |
01225596 TM |
4758 | goto out; |
4759 | } | |
4760 | ||
4761 | set_value_outside: | |
85db90e7 TM |
4762 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
4763 | xs, val, value_len); | |
01225596 TM |
4764 | out: |
4765 | return ret; | |
4766 | } | |
4767 | ||
80bcaf34 TM |
4768 | /* |
4769 | * check whether the xattr bucket is filled up with the same hash value. | |
4770 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
4771 | * If we want to insert a xattr with different hash value, go ahead | |
4772 | * and ocfs2_divide_xattr_bucket will handle this. | |
4773 | */ | |
01225596 | 4774 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
4775 | struct ocfs2_xattr_bucket *bucket, |
4776 | const char *name) | |
01225596 | 4777 | { |
3e632946 | 4778 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
4779 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
4780 | ||
4781 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
4782 | return 0; | |
01225596 TM |
4783 | |
4784 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
4785 | xh->xh_entries[0].xe_name_hash) { | |
4786 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
4787 | "hash = %u\n", | |
9c7759aa | 4788 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
4789 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
4790 | return -ENOSPC; | |
4791 | } | |
4792 | ||
4793 | return 0; | |
4794 | } | |
4795 | ||
4796 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
4797 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4798 | struct ocfs2_xattr_search *xs, |
4799 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4800 | { |
4801 | struct ocfs2_xattr_header *xh; | |
4802 | struct ocfs2_xattr_entry *xe; | |
4803 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 4804 | int free, max_free, need, old; |
01225596 TM |
4805 | size_t value_size = 0, name_len = strlen(xi->name); |
4806 | size_t blocksize = inode->i_sb->s_blocksize; | |
4807 | int ret, allocation = 0; | |
01225596 TM |
4808 | |
4809 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
4810 | ||
4811 | try_again: | |
4812 | xh = xs->header; | |
4813 | count = le16_to_cpu(xh->xh_count); | |
4814 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4815 | header_size = sizeof(struct ocfs2_xattr_header) + | |
4816 | count * sizeof(struct ocfs2_xattr_entry); | |
4817 | max_free = OCFS2_XATTR_BUCKET_SIZE - | |
4818 | le16_to_cpu(xh->xh_name_value_len) - header_size; | |
4819 | ||
4820 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
4821 | "of %u which exceed block size\n", | |
ba937127 | 4822 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
4823 | header_size); |
4824 | ||
4825 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4826 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
4827 | else if (xi->value) | |
4828 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
4829 | ||
4830 | if (xs->not_found) | |
4831 | need = sizeof(struct ocfs2_xattr_entry) + | |
4832 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
4833 | else { | |
4834 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
4835 | ||
4836 | /* | |
4837 | * We only replace the old value if the new length is smaller | |
4838 | * than the old one. Otherwise we will allocate new space in the | |
4839 | * bucket to store it. | |
4840 | */ | |
4841 | xe = xs->here; | |
4842 | if (ocfs2_xattr_is_local(xe)) | |
4843 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4844 | else | |
4845 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4846 | ||
4847 | if (old >= value_size) | |
4848 | need = 0; | |
4849 | } | |
4850 | ||
4851 | free = xh_free_start - header_size; | |
4852 | /* | |
4853 | * We need to make sure the new name/value pair | |
4854 | * can exist in the same block. | |
4855 | */ | |
4856 | if (xh_free_start % blocksize < need) | |
4857 | free -= xh_free_start % blocksize; | |
4858 | ||
4859 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
4860 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
4861 | " %u\n", xs->not_found, | |
ba937127 | 4862 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
4863 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
4864 | le16_to_cpu(xh->xh_name_value_len)); | |
4865 | ||
976331d8 TM |
4866 | if (free < need || |
4867 | (xs->not_found && | |
4868 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
4869 | if (need <= max_free && |
4870 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4871 | /* | |
4872 | * We can create the space by defragment. Since only the | |
4873 | * name/value will be moved, the xe shouldn't be changed | |
4874 | * in xs. | |
4875 | */ | |
85db90e7 TM |
4876 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
4877 | xs->bucket); | |
01225596 TM |
4878 | if (ret) { |
4879 | mlog_errno(ret); | |
4880 | goto out; | |
4881 | } | |
4882 | ||
4883 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4884 | free = xh_free_start - header_size; | |
4885 | if (xh_free_start % blocksize < need) | |
4886 | free -= xh_free_start % blocksize; | |
4887 | ||
4888 | if (free >= need) | |
4889 | goto xattr_set; | |
4890 | ||
4891 | mlog(0, "Can't get enough space for xattr insert by " | |
4892 | "defragment. Need %u bytes, but we have %d, so " | |
4893 | "allocate new bucket for it.\n", need, free); | |
4894 | } | |
4895 | ||
4896 | /* | |
4897 | * We have to add new buckets or clusters and one | |
4898 | * allocation should leave us enough space for insert. | |
4899 | */ | |
4900 | BUG_ON(allocation); | |
4901 | ||
4902 | /* | |
4903 | * We do not allow for overlapping ranges between buckets. And | |
4904 | * the maximum number of collisions we will allow for then is | |
4905 | * one bucket's worth, so check it here whether we need to | |
4906 | * add a new bucket for the insert. | |
4907 | */ | |
80bcaf34 | 4908 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 4909 | xs->bucket, |
80bcaf34 | 4910 | xi->name); |
01225596 TM |
4911 | if (ret) { |
4912 | mlog_errno(ret); | |
4913 | goto out; | |
4914 | } | |
4915 | ||
4916 | ret = ocfs2_add_new_xattr_bucket(inode, | |
4917 | xs->xattr_bh, | |
78f30c31 TM |
4918 | xs->bucket->bu_bhs[0], |
4919 | ctxt); | |
01225596 TM |
4920 | if (ret) { |
4921 | mlog_errno(ret); | |
4922 | goto out; | |
4923 | } | |
4924 | ||
ba937127 | 4925 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
4926 | |
4927 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
4928 | xi->name_index, | |
4929 | xi->name, xs); | |
4930 | if (ret && ret != -ENODATA) | |
4931 | goto out; | |
4932 | xs->not_found = ret; | |
4933 | allocation = 1; | |
4934 | goto try_again; | |
4935 | } | |
4936 | ||
4937 | xattr_set: | |
78f30c31 | 4938 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
4939 | out: |
4940 | mlog_exit(ret); | |
4941 | return ret; | |
4942 | } | |
a3944256 TM |
4943 | |
4944 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
4945 | struct ocfs2_xattr_bucket *bucket, | |
4946 | void *para) | |
4947 | { | |
4948 | int ret = 0; | |
3e632946 | 4949 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
4950 | u16 i; |
4951 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
4952 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
4953 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
4954 | ||
4955 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 | 4956 | |
85db90e7 TM |
4957 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); |
4958 | if (IS_ERR(ctxt.handle)) { | |
4959 | ret = PTR_ERR(ctxt.handle); | |
4960 | mlog_errno(ret); | |
4961 | goto out; | |
4962 | } | |
4963 | ||
a3944256 TM |
4964 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
4965 | xe = &xh->xh_entries[i]; | |
4966 | if (ocfs2_xattr_is_local(xe)) | |
4967 | continue; | |
4968 | ||
4969 | ret = ocfs2_xattr_bucket_value_truncate(inode, | |
4ac6032d | 4970 | bucket->bu_bhs[0], |
78f30c31 | 4971 | i, 0, &ctxt); |
a3944256 TM |
4972 | if (ret) { |
4973 | mlog_errno(ret); | |
4974 | break; | |
4975 | } | |
4976 | } | |
4977 | ||
85db90e7 | 4978 | ret = ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
4979 | ocfs2_schedule_truncate_log_flush(osb, 1); |
4980 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 4981 | out: |
a3944256 TM |
4982 | return ret; |
4983 | } | |
4984 | ||
4985 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
4986 | struct buffer_head *xb_bh) | |
4987 | { | |
4988 | struct ocfs2_xattr_block *xb = | |
4989 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4990 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
4991 | int ret = 0; | |
4992 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
4993 | u64 p_blkno; | |
4994 | ||
4995 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
4996 | return 0; | |
4997 | ||
4998 | while (name_hash > 0) { | |
4999 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
5000 | &e_cpos, &num_clusters, el); | |
5001 | if (ret) { | |
5002 | mlog_errno(ret); | |
5003 | goto out; | |
5004 | } | |
5005 | ||
5006 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
5007 | ocfs2_delete_xattr_in_bucket, | |
5008 | NULL); | |
5009 | if (ret) { | |
5010 | mlog_errno(ret); | |
5011 | goto out; | |
5012 | } | |
5013 | ||
5014 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
5015 | p_blkno, e_cpos, num_clusters); | |
5016 | if (ret) { | |
5017 | mlog_errno(ret); | |
5018 | break; | |
5019 | } | |
5020 | ||
5021 | if (e_cpos == 0) | |
5022 | break; | |
5023 | ||
5024 | name_hash = e_cpos - 1; | |
5025 | } | |
5026 | ||
5027 | out: | |
5028 | return ret; | |
5029 | } | |
99219aea | 5030 | |
923f7f31 TY |
5031 | /* |
5032 | * 'security' attributes support | |
5033 | */ | |
5034 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5035 | size_t list_size, const char *name, | |
5036 | size_t name_len) | |
5037 | { | |
5038 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5039 | const size_t total_len = prefix_len + name_len + 1; | |
5040 | ||
5041 | if (list && total_len <= list_size) { | |
5042 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5043 | memcpy(list + prefix_len, name, name_len); | |
5044 | list[prefix_len + name_len] = '\0'; | |
5045 | } | |
5046 | return total_len; | |
5047 | } | |
5048 | ||
5049 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5050 | void *buffer, size_t size) | |
5051 | { | |
5052 | if (strcmp(name, "") == 0) | |
5053 | return -EINVAL; | |
5054 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5055 | buffer, size); | |
5056 | } | |
5057 | ||
5058 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5059 | const void *value, size_t size, int flags) | |
5060 | { | |
5061 | if (strcmp(name, "") == 0) | |
5062 | return -EINVAL; | |
5063 | ||
5064 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5065 | size, flags); | |
5066 | } | |
5067 | ||
534eaddd TY |
5068 | int ocfs2_init_security_get(struct inode *inode, |
5069 | struct inode *dir, | |
5070 | struct ocfs2_security_xattr_info *si) | |
5071 | { | |
5072 | return security_inode_init_security(inode, dir, &si->name, &si->value, | |
5073 | &si->value_len); | |
5074 | } | |
5075 | ||
5076 | int ocfs2_init_security_set(handle_t *handle, | |
5077 | struct inode *inode, | |
5078 | struct buffer_head *di_bh, | |
5079 | struct ocfs2_security_xattr_info *si, | |
5080 | struct ocfs2_alloc_context *xattr_ac, | |
5081 | struct ocfs2_alloc_context *data_ac) | |
5082 | { | |
5083 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5084 | OCFS2_XATTR_INDEX_SECURITY, | |
5085 | si->name, si->value, si->value_len, 0, | |
5086 | xattr_ac, data_ac); | |
5087 | } | |
5088 | ||
923f7f31 TY |
5089 | struct xattr_handler ocfs2_xattr_security_handler = { |
5090 | .prefix = XATTR_SECURITY_PREFIX, | |
5091 | .list = ocfs2_xattr_security_list, | |
5092 | .get = ocfs2_xattr_security_get, | |
5093 | .set = ocfs2_xattr_security_set, | |
5094 | }; | |
5095 | ||
99219aea MF |
5096 | /* |
5097 | * 'trusted' attributes support | |
5098 | */ | |
99219aea MF |
5099 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5100 | size_t list_size, const char *name, | |
5101 | size_t name_len) | |
5102 | { | |
ceb1eba3 | 5103 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5104 | const size_t total_len = prefix_len + name_len + 1; |
5105 | ||
5106 | if (list && total_len <= list_size) { | |
5107 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5108 | memcpy(list + prefix_len, name, name_len); | |
5109 | list[prefix_len + name_len] = '\0'; | |
5110 | } | |
5111 | return total_len; | |
5112 | } | |
5113 | ||
5114 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5115 | void *buffer, size_t size) | |
5116 | { | |
5117 | if (strcmp(name, "") == 0) | |
5118 | return -EINVAL; | |
5119 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5120 | buffer, size); | |
5121 | } | |
5122 | ||
5123 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5124 | const void *value, size_t size, int flags) | |
5125 | { | |
5126 | if (strcmp(name, "") == 0) | |
5127 | return -EINVAL; | |
5128 | ||
5129 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5130 | size, flags); | |
5131 | } | |
5132 | ||
5133 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5134 | .prefix = XATTR_TRUSTED_PREFIX, | |
5135 | .list = ocfs2_xattr_trusted_list, | |
5136 | .get = ocfs2_xattr_trusted_get, | |
5137 | .set = ocfs2_xattr_trusted_set, | |
5138 | }; | |
5139 | ||
99219aea MF |
5140 | /* |
5141 | * 'user' attributes support | |
5142 | */ | |
99219aea MF |
5143 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5144 | size_t list_size, const char *name, | |
5145 | size_t name_len) | |
5146 | { | |
ceb1eba3 | 5147 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5148 | const size_t total_len = prefix_len + name_len + 1; |
5149 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5150 | ||
5151 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5152 | return 0; | |
5153 | ||
5154 | if (list && total_len <= list_size) { | |
5155 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5156 | memcpy(list + prefix_len, name, name_len); | |
5157 | list[prefix_len + name_len] = '\0'; | |
5158 | } | |
5159 | return total_len; | |
5160 | } | |
5161 | ||
5162 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5163 | void *buffer, size_t size) | |
5164 | { | |
5165 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5166 | ||
5167 | if (strcmp(name, "") == 0) | |
5168 | return -EINVAL; | |
5169 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5170 | return -EOPNOTSUPP; | |
5171 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5172 | buffer, size); | |
5173 | } | |
5174 | ||
5175 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5176 | const void *value, size_t size, int flags) | |
5177 | { | |
5178 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5179 | ||
5180 | if (strcmp(name, "") == 0) | |
5181 | return -EINVAL; | |
5182 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5183 | return -EOPNOTSUPP; | |
5184 | ||
5185 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5186 | size, flags); | |
5187 | } | |
5188 | ||
5189 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5190 | .prefix = XATTR_USER_PREFIX, | |
5191 | .list = ocfs2_xattr_user_list, | |
5192 | .get = ocfs2_xattr_user_get, | |
5193 | .set = ocfs2_xattr_user_set, | |
5194 | }; |