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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)) | |
89c38bd0 TY |
87 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
88 | - sizeof(struct ocfs2_xattr_block) \ | |
89 | - sizeof(struct ocfs2_xattr_header) \ | |
90 | - sizeof(__u32)) | |
cf1d6c76 TY |
91 | |
92 | static struct ocfs2_xattr_def_value_root def_xv = { | |
93 | .xv.xr_list.l_count = cpu_to_le16(1), | |
94 | }; | |
95 | ||
96 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
97 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
98 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
99 | &ocfs2_xattr_acl_access_handler, | |
100 | &ocfs2_xattr_acl_default_handler, | |
101 | #endif | |
cf1d6c76 | 102 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 103 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
104 | NULL |
105 | }; | |
106 | ||
c988fd04 | 107 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 108 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
109 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
110 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] | |
111 | = &ocfs2_xattr_acl_access_handler, | |
112 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
113 | = &ocfs2_xattr_acl_default_handler, | |
114 | #endif | |
cf1d6c76 | 115 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 116 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
117 | }; |
118 | ||
119 | struct ocfs2_xattr_info { | |
120 | int name_index; | |
121 | const char *name; | |
122 | const void *value; | |
123 | size_t value_len; | |
124 | }; | |
125 | ||
126 | struct ocfs2_xattr_search { | |
127 | struct buffer_head *inode_bh; | |
128 | /* | |
129 | * xattr_bh point to the block buffer head which has extended attribute | |
130 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
131 | */ | |
132 | struct buffer_head *xattr_bh; | |
133 | struct ocfs2_xattr_header *header; | |
ba937127 | 134 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
135 | void *base; |
136 | void *end; | |
137 | struct ocfs2_xattr_entry *here; | |
138 | int not_found; | |
139 | }; | |
140 | ||
589dc260 TM |
141 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
142 | struct ocfs2_xattr_header *xh, | |
143 | int index, | |
144 | int *block_off, | |
145 | int *new_offset); | |
146 | ||
54f443f4 JB |
147 | static int ocfs2_xattr_block_find(struct inode *inode, |
148 | int name_index, | |
149 | const char *name, | |
150 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
151 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
152 | struct buffer_head *root_bh, | |
153 | int name_index, | |
154 | const char *name, | |
155 | struct ocfs2_xattr_search *xs); | |
156 | ||
0c044f0b TM |
157 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
158 | struct ocfs2_xattr_tree_root *xt, | |
159 | char *buffer, | |
160 | size_t buffer_size); | |
161 | ||
01225596 | 162 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
163 | struct ocfs2_xattr_search *xs, |
164 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
165 | |
166 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
167 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
168 | struct ocfs2_xattr_search *xs, |
169 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 170 | |
a3944256 TM |
171 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
172 | struct buffer_head *xb_bh); | |
173 | ||
0030e001 TY |
174 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
175 | { | |
176 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
177 | } | |
178 | ||
179 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
180 | { | |
181 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
182 | } | |
183 | ||
184 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
185 | { | |
186 | u16 len = sb->s_blocksize - | |
187 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
188 | ||
189 | return len / sizeof(struct ocfs2_xattr_entry); | |
190 | } | |
191 | ||
9c7759aa | 192 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 193 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 194 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 195 | |
ba937127 | 196 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 197 | { |
ba937127 JB |
198 | struct ocfs2_xattr_bucket *bucket; |
199 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 200 | |
ba937127 JB |
201 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
202 | ||
203 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
204 | if (bucket) { | |
205 | bucket->bu_inode = inode; | |
206 | bucket->bu_blocks = blks; | |
207 | } | |
208 | ||
209 | return bucket; | |
210 | } | |
211 | ||
212 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
213 | { | |
214 | int i; | |
215 | ||
216 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
217 | brelse(bucket->bu_bhs[i]); |
218 | bucket->bu_bhs[i] = NULL; | |
219 | } | |
220 | } | |
221 | ||
ba937127 JB |
222 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
223 | { | |
224 | if (bucket) { | |
225 | ocfs2_xattr_bucket_relse(bucket); | |
226 | bucket->bu_inode = NULL; | |
227 | kfree(bucket); | |
228 | } | |
229 | } | |
230 | ||
784b816a JB |
231 | /* |
232 | * A bucket that has never been written to disk doesn't need to be | |
233 | * read. We just need the buffer_heads. Don't call this for | |
234 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
235 | * them fully. | |
236 | */ | |
ba937127 | 237 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
238 | u64 xb_blkno) |
239 | { | |
240 | int i, rc = 0; | |
784b816a | 241 | |
ba937127 JB |
242 | for (i = 0; i < bucket->bu_blocks; i++) { |
243 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
244 | xb_blkno + i); | |
784b816a JB |
245 | if (!bucket->bu_bhs[i]) { |
246 | rc = -EIO; | |
247 | mlog_errno(rc); | |
248 | break; | |
249 | } | |
250 | ||
757055ad TM |
251 | if (!ocfs2_buffer_uptodate(bucket->bu_inode, |
252 | bucket->bu_bhs[i])) | |
253 | ocfs2_set_new_buffer_uptodate(bucket->bu_inode, | |
254 | bucket->bu_bhs[i]); | |
784b816a JB |
255 | } |
256 | ||
257 | if (rc) | |
ba937127 | 258 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
259 | return rc; |
260 | } | |
261 | ||
262 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 263 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
264 | u64 xb_blkno) |
265 | { | |
ba937127 | 266 | int rc; |
784b816a | 267 | |
ba937127 | 268 | rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno, |
970e4936 JB |
269 | bucket->bu_blocks, bucket->bu_bhs, 0, |
270 | NULL); | |
784b816a | 271 | if (rc) |
ba937127 | 272 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
273 | return rc; |
274 | } | |
275 | ||
1224be02 | 276 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
277 | struct ocfs2_xattr_bucket *bucket, |
278 | int type) | |
279 | { | |
280 | int i, rc = 0; | |
1224be02 | 281 | |
ba937127 JB |
282 | for (i = 0; i < bucket->bu_blocks; i++) { |
283 | rc = ocfs2_journal_access(handle, bucket->bu_inode, | |
1224be02 JB |
284 | bucket->bu_bhs[i], type); |
285 | if (rc) { | |
286 | mlog_errno(rc); | |
287 | break; | |
288 | } | |
289 | } | |
290 | ||
291 | return rc; | |
292 | } | |
293 | ||
294 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
295 | struct ocfs2_xattr_bucket *bucket) |
296 | { | |
ba937127 | 297 | int i; |
1224be02 | 298 | |
ba937127 | 299 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
300 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
301 | } | |
302 | ||
ba937127 | 303 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
304 | struct ocfs2_xattr_bucket *src) |
305 | { | |
306 | int i; | |
ba937127 JB |
307 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
308 | ||
309 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
310 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 311 | |
ba937127 | 312 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
313 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
314 | blocksize); | |
315 | } | |
316 | } | |
1224be02 | 317 | |
4ae1d69b JB |
318 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
319 | struct buffer_head *bh) | |
320 | { | |
321 | struct ocfs2_xattr_block *xb = | |
322 | (struct ocfs2_xattr_block *)bh->b_data; | |
323 | ||
324 | mlog(0, "Validating xattr block %llu\n", | |
325 | (unsigned long long)bh->b_blocknr); | |
326 | ||
327 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { | |
328 | ocfs2_error(sb, | |
329 | "Extended attribute block #%llu has bad " | |
330 | "signature %.*s", | |
331 | (unsigned long long)bh->b_blocknr, 7, | |
332 | xb->xb_signature); | |
333 | return -EINVAL; | |
334 | } | |
335 | ||
336 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
337 | ocfs2_error(sb, | |
338 | "Extended attribute block #%llu has an " | |
339 | "invalid xb_blkno of %llu", | |
340 | (unsigned long long)bh->b_blocknr, | |
341 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
346 | ocfs2_error(sb, | |
347 | "Extended attribute block #%llu has an invalid " | |
348 | "xb_fs_generation of #%u", | |
349 | (unsigned long long)bh->b_blocknr, | |
350 | le32_to_cpu(xb->xb_fs_generation)); | |
351 | return -EINVAL; | |
352 | } | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
358 | struct buffer_head **bh) | |
359 | { | |
360 | int rc; | |
361 | struct buffer_head *tmp = *bh; | |
362 | ||
970e4936 JB |
363 | rc = ocfs2_read_block(inode, xb_blkno, &tmp, |
364 | ocfs2_validate_xattr_block); | |
4ae1d69b JB |
365 | |
366 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
367 | if (!rc && !*bh) | |
368 | *bh = tmp; | |
369 | ||
370 | return rc; | |
371 | } | |
372 | ||
936b8834 | 373 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
374 | { |
375 | struct xattr_handler *handler = NULL; | |
376 | ||
377 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
378 | handler = ocfs2_xattr_handler_map[name_index]; | |
379 | ||
936b8834 | 380 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
381 | } |
382 | ||
40daa16a | 383 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 384 | const char *name, |
40daa16a | 385 | int name_len) |
cf1d6c76 TY |
386 | { |
387 | /* Get hash value of uuid from super block */ | |
388 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
389 | int i; | |
390 | ||
cf1d6c76 TY |
391 | /* hash extended attribute name */ |
392 | for (i = 0; i < name_len; i++) { | |
393 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
394 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
395 | *name++; | |
396 | } | |
397 | ||
398 | return hash; | |
399 | } | |
400 | ||
401 | /* | |
402 | * ocfs2_xattr_hash_entry() | |
403 | * | |
404 | * Compute the hash of an extended attribute. | |
405 | */ | |
406 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
407 | struct ocfs2_xattr_header *header, | |
408 | struct ocfs2_xattr_entry *entry) | |
409 | { | |
410 | u32 hash = 0; | |
cf1d6c76 | 411 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 412 | |
2057e5c6 | 413 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
414 | entry->xe_name_hash = cpu_to_le32(hash); |
415 | ||
416 | return; | |
417 | } | |
f56654c4 | 418 | |
534eaddd TY |
419 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
420 | { | |
421 | int size = 0; | |
422 | ||
423 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
424 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
425 | else | |
426 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
427 | size += sizeof(struct ocfs2_xattr_entry); | |
428 | ||
429 | return size; | |
430 | } | |
431 | ||
432 | int ocfs2_calc_security_init(struct inode *dir, | |
433 | struct ocfs2_security_xattr_info *si, | |
434 | int *want_clusters, | |
435 | int *xattr_credits, | |
436 | struct ocfs2_alloc_context **xattr_ac) | |
437 | { | |
438 | int ret = 0; | |
439 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
440 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
441 | si->value_len); | |
442 | ||
443 | /* | |
444 | * The max space of security xattr taken inline is | |
445 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
446 | * So reserve one metadata block for it is ok. | |
447 | */ | |
448 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
449 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
450 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
451 | if (ret) { | |
452 | mlog_errno(ret); | |
453 | return ret; | |
454 | } | |
455 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
456 | } | |
457 | ||
458 | /* reserve clusters for xattr value which will be set in B tree*/ | |
459 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) | |
460 | *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, | |
461 | si->value_len); | |
462 | return ret; | |
463 | } | |
464 | ||
89c38bd0 TY |
465 | int ocfs2_calc_xattr_init(struct inode *dir, |
466 | struct buffer_head *dir_bh, | |
467 | int mode, | |
468 | struct ocfs2_security_xattr_info *si, | |
469 | int *want_clusters, | |
470 | int *xattr_credits, | |
471 | struct ocfs2_alloc_context **xattr_ac) | |
472 | { | |
473 | int ret = 0; | |
474 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
475 | int s_size = 0; | |
476 | int a_size = 0; | |
477 | int acl_len = 0; | |
478 | ||
479 | if (si->enable) | |
480 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
481 | si->value_len); | |
482 | ||
483 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
484 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
485 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
486 | "", NULL, 0); | |
487 | if (acl_len > 0) { | |
488 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
489 | if (S_ISDIR(mode)) | |
490 | a_size <<= 1; | |
491 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
492 | mlog_errno(ret); | |
493 | return ret; | |
494 | } | |
495 | } | |
496 | ||
497 | if (!(s_size + a_size)) | |
498 | return ret; | |
499 | ||
500 | /* | |
501 | * The max space of security xattr taken inline is | |
502 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
503 | * The max space of acl xattr taken inline is | |
504 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
505 | * when blocksize = 512, may reserve one more cluser for | |
506 | * xattr bucket, otherwise reserve one metadata block | |
507 | * for them is ok. | |
508 | */ | |
509 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
510 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { | |
511 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
512 | if (ret) { | |
513 | mlog_errno(ret); | |
514 | return ret; | |
515 | } | |
516 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
517 | } | |
518 | ||
519 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
520 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
521 | *want_clusters += 1; | |
522 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
523 | } | |
524 | ||
525 | /* reserve clusters for xattr value which will be set in B tree*/ | |
526 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) | |
527 | *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, | |
528 | si->value_len); | |
529 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && | |
530 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
531 | *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
532 | if (S_ISDIR(mode)) | |
533 | *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, | |
534 | acl_len); | |
535 | } | |
536 | ||
537 | return ret; | |
538 | } | |
539 | ||
f56654c4 TM |
540 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
541 | u32 clusters_to_add, | |
542 | struct buffer_head *xattr_bh, | |
78f30c31 TM |
543 | struct ocfs2_xattr_value_root *xv, |
544 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
545 | { |
546 | int status = 0; | |
85db90e7 | 547 | handle_t *handle = ctxt->handle; |
f56654c4 TM |
548 | enum ocfs2_alloc_restarted why; |
549 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 | 550 | u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); |
f99b9b7c | 551 | struct ocfs2_extent_tree et; |
f56654c4 TM |
552 | |
553 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
554 | ||
8d6220d6 | 555 | ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
f99b9b7c | 556 | |
f56654c4 TM |
557 | status = ocfs2_journal_access(handle, inode, xattr_bh, |
558 | OCFS2_JOURNAL_ACCESS_WRITE); | |
559 | if (status < 0) { | |
560 | mlog_errno(status); | |
561 | goto leave; | |
562 | } | |
563 | ||
564 | prev_clusters = le32_to_cpu(xv->xr_clusters); | |
565 | status = ocfs2_add_clusters_in_btree(osb, | |
566 | inode, | |
567 | &logical_start, | |
568 | clusters_to_add, | |
569 | 0, | |
f99b9b7c | 570 | &et, |
f56654c4 | 571 | handle, |
78f30c31 TM |
572 | ctxt->data_ac, |
573 | ctxt->meta_ac, | |
f99b9b7c | 574 | &why); |
85db90e7 TM |
575 | if (status < 0) { |
576 | mlog_errno(status); | |
f56654c4 TM |
577 | goto leave; |
578 | } | |
579 | ||
580 | status = ocfs2_journal_dirty(handle, xattr_bh); | |
581 | if (status < 0) { | |
582 | mlog_errno(status); | |
583 | goto leave; | |
584 | } | |
585 | ||
586 | clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; | |
587 | ||
85db90e7 TM |
588 | /* |
589 | * We should have already allocated enough space before the transaction, | |
590 | * so no need to restart. | |
591 | */ | |
592 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
593 | |
594 | leave: | |
f56654c4 TM |
595 | |
596 | return status; | |
597 | } | |
598 | ||
599 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
600 | struct buffer_head *root_bh, | |
601 | struct ocfs2_xattr_value_root *xv, | |
602 | u32 cpos, u32 phys_cpos, u32 len, | |
78f30c31 | 603 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
604 | { |
605 | int ret; | |
606 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 607 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
608 | struct ocfs2_extent_tree et; |
609 | ||
8d6220d6 | 610 | ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
f56654c4 | 611 | |
f56654c4 TM |
612 | ret = ocfs2_journal_access(handle, inode, root_bh, |
613 | OCFS2_JOURNAL_ACCESS_WRITE); | |
614 | if (ret) { | |
615 | mlog_errno(ret); | |
85db90e7 | 616 | goto out; |
f56654c4 TM |
617 | } |
618 | ||
78f30c31 TM |
619 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, |
620 | &ctxt->dealloc); | |
f56654c4 TM |
621 | if (ret) { |
622 | mlog_errno(ret); | |
85db90e7 | 623 | goto out; |
f56654c4 TM |
624 | } |
625 | ||
626 | le32_add_cpu(&xv->xr_clusters, -len); | |
627 | ||
628 | ret = ocfs2_journal_dirty(handle, root_bh); | |
629 | if (ret) { | |
630 | mlog_errno(ret); | |
85db90e7 | 631 | goto out; |
f56654c4 TM |
632 | } |
633 | ||
78f30c31 | 634 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); |
f56654c4 TM |
635 | if (ret) |
636 | mlog_errno(ret); | |
637 | ||
f56654c4 | 638 | out: |
f56654c4 TM |
639 | return ret; |
640 | } | |
641 | ||
642 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
643 | u32 old_clusters, | |
644 | u32 new_clusters, | |
645 | struct buffer_head *root_bh, | |
78f30c31 TM |
646 | struct ocfs2_xattr_value_root *xv, |
647 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
648 | { |
649 | int ret = 0; | |
650 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
651 | u64 block; | |
f56654c4 TM |
652 | |
653 | if (old_clusters <= new_clusters) | |
654 | return 0; | |
655 | ||
656 | cpos = new_clusters; | |
657 | trunc_len = old_clusters - new_clusters; | |
658 | while (trunc_len) { | |
659 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
660 | &alloc_size, &xv->xr_list); | |
661 | if (ret) { | |
662 | mlog_errno(ret); | |
663 | goto out; | |
664 | } | |
665 | ||
666 | if (alloc_size > trunc_len) | |
667 | alloc_size = trunc_len; | |
668 | ||
669 | ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, | |
670 | phys_cpos, alloc_size, | |
78f30c31 | 671 | ctxt); |
f56654c4 TM |
672 | if (ret) { |
673 | mlog_errno(ret); | |
674 | goto out; | |
675 | } | |
676 | ||
677 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
678 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
679 | alloc_size); | |
680 | cpos += alloc_size; | |
681 | trunc_len -= alloc_size; | |
682 | } | |
683 | ||
684 | out: | |
f56654c4 TM |
685 | return ret; |
686 | } | |
687 | ||
688 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
689 | struct buffer_head *root_bh, | |
690 | struct ocfs2_xattr_value_root *xv, | |
78f30c31 TM |
691 | int len, |
692 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
693 | { |
694 | int ret; | |
695 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
696 | u32 old_clusters = le32_to_cpu(xv->xr_clusters); | |
697 | ||
698 | if (new_clusters == old_clusters) | |
699 | return 0; | |
700 | ||
701 | if (new_clusters > old_clusters) | |
702 | ret = ocfs2_xattr_extend_allocation(inode, | |
703 | new_clusters - old_clusters, | |
78f30c31 | 704 | root_bh, xv, ctxt); |
f56654c4 TM |
705 | else |
706 | ret = ocfs2_xattr_shrink_size(inode, | |
707 | old_clusters, new_clusters, | |
78f30c31 | 708 | root_bh, xv, ctxt); |
f56654c4 TM |
709 | |
710 | return ret; | |
711 | } | |
cf1d6c76 | 712 | |
936b8834 TM |
713 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
714 | size_t *result, const char *prefix, | |
715 | const char *name, int name_len) | |
716 | { | |
717 | char *p = buffer + *result; | |
718 | int prefix_len = strlen(prefix); | |
719 | int total_len = prefix_len + name_len + 1; | |
720 | ||
721 | *result += total_len; | |
722 | ||
723 | /* we are just looking for how big our buffer needs to be */ | |
724 | if (!size) | |
725 | return 0; | |
726 | ||
727 | if (*result > size) | |
728 | return -ERANGE; | |
729 | ||
730 | memcpy(p, prefix, prefix_len); | |
731 | memcpy(p + prefix_len, name, name_len); | |
732 | p[prefix_len + name_len] = '\0'; | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
cf1d6c76 TY |
737 | static int ocfs2_xattr_list_entries(struct inode *inode, |
738 | struct ocfs2_xattr_header *header, | |
739 | char *buffer, size_t buffer_size) | |
740 | { | |
936b8834 TM |
741 | size_t result = 0; |
742 | int i, type, ret; | |
743 | const char *prefix, *name; | |
cf1d6c76 TY |
744 | |
745 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
746 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
747 | type = ocfs2_xattr_get_type(entry); |
748 | prefix = ocfs2_xattr_prefix(type); | |
749 | ||
750 | if (prefix) { | |
751 | name = (const char *)header + | |
752 | le16_to_cpu(entry->xe_name_offset); | |
753 | ||
754 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
755 | &result, prefix, name, | |
756 | entry->xe_name_len); | |
757 | if (ret) | |
758 | return ret; | |
cf1d6c76 TY |
759 | } |
760 | } | |
761 | ||
936b8834 | 762 | return result; |
cf1d6c76 TY |
763 | } |
764 | ||
765 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
766 | struct ocfs2_dinode *di, | |
767 | char *buffer, | |
768 | size_t buffer_size) | |
769 | { | |
770 | struct ocfs2_xattr_header *header = NULL; | |
771 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
772 | int ret = 0; | |
773 | ||
774 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
775 | return ret; | |
776 | ||
777 | header = (struct ocfs2_xattr_header *) | |
778 | ((void *)di + inode->i_sb->s_blocksize - | |
779 | le16_to_cpu(di->i_xattr_inline_size)); | |
780 | ||
781 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
782 | ||
783 | return ret; | |
784 | } | |
785 | ||
786 | static int ocfs2_xattr_block_list(struct inode *inode, | |
787 | struct ocfs2_dinode *di, | |
788 | char *buffer, | |
789 | size_t buffer_size) | |
790 | { | |
791 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 792 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
793 | int ret = 0; |
794 | ||
795 | if (!di->i_xattr_loc) | |
796 | return ret; | |
797 | ||
4ae1d69b JB |
798 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
799 | &blk_bh); | |
cf1d6c76 TY |
800 | if (ret < 0) { |
801 | mlog_errno(ret); | |
802 | return ret; | |
803 | } | |
cf1d6c76 | 804 | |
0c044f0b | 805 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
806 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
807 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
808 | ret = ocfs2_xattr_list_entries(inode, header, | |
809 | buffer, buffer_size); | |
810 | } else { | |
811 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
812 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
813 | buffer, buffer_size); | |
814 | } | |
4ae1d69b | 815 | |
cf1d6c76 TY |
816 | brelse(blk_bh); |
817 | ||
818 | return ret; | |
819 | } | |
820 | ||
821 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
822 | char *buffer, | |
823 | size_t size) | |
824 | { | |
825 | int ret = 0, i_ret = 0, b_ret = 0; | |
826 | struct buffer_head *di_bh = NULL; | |
827 | struct ocfs2_dinode *di = NULL; | |
828 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
829 | ||
8154da3d TY |
830 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
831 | return -EOPNOTSUPP; | |
832 | ||
cf1d6c76 TY |
833 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
834 | return ret; | |
835 | ||
836 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
837 | if (ret < 0) { | |
838 | mlog_errno(ret); | |
839 | return ret; | |
840 | } | |
841 | ||
842 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
843 | ||
844 | down_read(&oi->ip_xattr_sem); | |
845 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
846 | if (i_ret < 0) | |
847 | b_ret = 0; | |
848 | else { | |
849 | if (buffer) { | |
850 | buffer += i_ret; | |
851 | size -= i_ret; | |
852 | } | |
853 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
854 | buffer, size); | |
855 | if (b_ret < 0) | |
856 | i_ret = 0; | |
857 | } | |
858 | up_read(&oi->ip_xattr_sem); | |
859 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
860 | ||
861 | brelse(di_bh); | |
862 | ||
863 | return i_ret + b_ret; | |
864 | } | |
865 | ||
866 | static int ocfs2_xattr_find_entry(int name_index, | |
867 | const char *name, | |
868 | struct ocfs2_xattr_search *xs) | |
869 | { | |
870 | struct ocfs2_xattr_entry *entry; | |
871 | size_t name_len; | |
872 | int i, cmp = 1; | |
873 | ||
874 | if (name == NULL) | |
875 | return -EINVAL; | |
876 | ||
877 | name_len = strlen(name); | |
878 | entry = xs->here; | |
879 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
880 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
881 | if (!cmp) | |
882 | cmp = name_len - entry->xe_name_len; | |
883 | if (!cmp) | |
884 | cmp = memcmp(name, (xs->base + | |
885 | le16_to_cpu(entry->xe_name_offset)), | |
886 | name_len); | |
887 | if (cmp == 0) | |
888 | break; | |
889 | entry += 1; | |
890 | } | |
891 | xs->here = entry; | |
892 | ||
893 | return cmp ? -ENODATA : 0; | |
894 | } | |
895 | ||
896 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 897 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
898 | void *buffer, |
899 | size_t len) | |
900 | { | |
901 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
902 | u64 blkno; | |
903 | int i, ret = 0; | |
904 | size_t cplen, blocksize; | |
905 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
906 | struct ocfs2_extent_list *el; |
907 | ||
cf1d6c76 TY |
908 | el = &xv->xr_list; |
909 | clusters = le32_to_cpu(xv->xr_clusters); | |
910 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
911 | blocksize = inode->i_sb->s_blocksize; | |
912 | ||
913 | cpos = 0; | |
914 | while (cpos < clusters) { | |
915 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
916 | &num_clusters, el); | |
917 | if (ret) { | |
918 | mlog_errno(ret); | |
919 | goto out; | |
920 | } | |
921 | ||
922 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
923 | /* Copy ocfs2_xattr_value */ | |
924 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 925 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
926 | if (ret) { |
927 | mlog_errno(ret); | |
928 | goto out; | |
929 | } | |
930 | ||
931 | cplen = len >= blocksize ? blocksize : len; | |
932 | memcpy(buffer, bh->b_data, cplen); | |
933 | len -= cplen; | |
934 | buffer += cplen; | |
935 | ||
936 | brelse(bh); | |
937 | bh = NULL; | |
938 | if (len == 0) | |
939 | break; | |
940 | } | |
941 | cpos += num_clusters; | |
942 | } | |
943 | out: | |
944 | return ret; | |
945 | } | |
946 | ||
947 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
948 | int name_index, | |
949 | const char *name, | |
950 | void *buffer, | |
951 | size_t buffer_size, | |
952 | struct ocfs2_xattr_search *xs) | |
953 | { | |
954 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
955 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 956 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
957 | size_t size; |
958 | int ret = 0; | |
959 | ||
960 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
961 | return -ENODATA; | |
962 | ||
963 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
964 | xs->header = (struct ocfs2_xattr_header *) | |
965 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
966 | xs->base = (void *)xs->header; | |
967 | xs->here = xs->header->xh_entries; | |
968 | ||
969 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
970 | if (ret) | |
971 | return ret; | |
972 | size = le64_to_cpu(xs->here->xe_value_size); | |
973 | if (buffer) { | |
974 | if (size > buffer_size) | |
975 | return -ERANGE; | |
976 | if (ocfs2_xattr_is_local(xs->here)) { | |
977 | memcpy(buffer, (void *)xs->base + | |
978 | le16_to_cpu(xs->here->xe_name_offset) + | |
979 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
980 | } else { | |
589dc260 TM |
981 | xv = (struct ocfs2_xattr_value_root *) |
982 | (xs->base + le16_to_cpu( | |
983 | xs->here->xe_name_offset) + | |
984 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
985 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
986 | buffer, size); |
987 | if (ret < 0) { | |
988 | mlog_errno(ret); | |
989 | return ret; | |
990 | } | |
991 | } | |
992 | } | |
993 | ||
994 | return size; | |
995 | } | |
996 | ||
997 | static int ocfs2_xattr_block_get(struct inode *inode, | |
998 | int name_index, | |
999 | const char *name, | |
1000 | void *buffer, | |
1001 | size_t buffer_size, | |
1002 | struct ocfs2_xattr_search *xs) | |
1003 | { | |
cf1d6c76 | 1004 | struct ocfs2_xattr_block *xb; |
589dc260 | 1005 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1006 | size_t size; |
589dc260 | 1007 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 | 1008 | |
ba937127 JB |
1009 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1010 | if (!xs->bucket) { | |
1011 | ret = -ENOMEM; | |
1012 | mlog_errno(ret); | |
1013 | goto cleanup; | |
1014 | } | |
589dc260 | 1015 | |
54f443f4 JB |
1016 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1017 | if (ret) { | |
cf1d6c76 | 1018 | mlog_errno(ret); |
cf1d6c76 TY |
1019 | goto cleanup; |
1020 | } | |
1021 | ||
6c1e183e TY |
1022 | if (xs->not_found) { |
1023 | ret = -ENODATA; | |
1024 | goto cleanup; | |
1025 | } | |
1026 | ||
54f443f4 | 1027 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1028 | size = le64_to_cpu(xs->here->xe_value_size); |
1029 | if (buffer) { | |
1030 | ret = -ERANGE; | |
1031 | if (size > buffer_size) | |
1032 | goto cleanup; | |
589dc260 TM |
1033 | |
1034 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1035 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1036 | i = xs->here - xs->header->xh_entries; | |
1037 | ||
1038 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
1039 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 1040 | bucket_xh(xs->bucket), |
589dc260 TM |
1041 | i, |
1042 | &block_off, | |
1043 | &name_offset); | |
ba937127 | 1044 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1045 | } |
cf1d6c76 TY |
1046 | if (ocfs2_xattr_is_local(xs->here)) { |
1047 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1048 | name_offset + name_len, size); |
cf1d6c76 | 1049 | } else { |
589dc260 TM |
1050 | xv = (struct ocfs2_xattr_value_root *) |
1051 | (xs->base + name_offset + name_len); | |
1052 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1053 | buffer, size); |
1054 | if (ret < 0) { | |
1055 | mlog_errno(ret); | |
1056 | goto cleanup; | |
1057 | } | |
1058 | } | |
1059 | } | |
1060 | ret = size; | |
1061 | cleanup: | |
ba937127 | 1062 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1063 | |
54f443f4 JB |
1064 | brelse(xs->xattr_bh); |
1065 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1066 | return ret; |
1067 | } | |
1068 | ||
4e3e9d02 TY |
1069 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1070 | struct buffer_head *di_bh, | |
0030e001 TY |
1071 | int name_index, |
1072 | const char *name, | |
1073 | void *buffer, | |
1074 | size_t buffer_size) | |
cf1d6c76 TY |
1075 | { |
1076 | int ret; | |
1077 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1078 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1079 | struct ocfs2_xattr_search xis = { | |
1080 | .not_found = -ENODATA, | |
1081 | }; | |
1082 | struct ocfs2_xattr_search xbs = { | |
1083 | .not_found = -ENODATA, | |
1084 | }; | |
1085 | ||
8154da3d TY |
1086 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1087 | return -EOPNOTSUPP; | |
1088 | ||
cf1d6c76 TY |
1089 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1090 | ret = -ENODATA; | |
1091 | ||
cf1d6c76 TY |
1092 | xis.inode_bh = xbs.inode_bh = di_bh; |
1093 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1094 | ||
1095 | down_read(&oi->ip_xattr_sem); | |
1096 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1097 | buffer_size, &xis); | |
6c1e183e | 1098 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1099 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1100 | buffer_size, &xbs); | |
1101 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1102 | |
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | /* ocfs2_xattr_get() | |
1107 | * | |
1108 | * Copy an extended attribute into the buffer provided. | |
1109 | * Buffer is NULL to compute the size of buffer required. | |
1110 | */ | |
1111 | static int ocfs2_xattr_get(struct inode *inode, | |
1112 | int name_index, | |
1113 | const char *name, | |
1114 | void *buffer, | |
1115 | size_t buffer_size) | |
1116 | { | |
1117 | int ret; | |
1118 | struct buffer_head *di_bh = NULL; | |
1119 | ||
1120 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1121 | if (ret < 0) { | |
1122 | mlog_errno(ret); | |
1123 | return ret; | |
1124 | } | |
1125 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1126 | name, buffer, buffer_size); | |
1127 | ||
cf1d6c76 TY |
1128 | ocfs2_inode_unlock(inode, 0); |
1129 | ||
1130 | brelse(di_bh); | |
1131 | ||
1132 | return ret; | |
1133 | } | |
1134 | ||
1135 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1136 | handle_t *handle, |
cf1d6c76 TY |
1137 | struct ocfs2_xattr_value_root *xv, |
1138 | const void *value, | |
1139 | int value_len) | |
1140 | { | |
1141 | int ret = 0, i, cp_len, credits; | |
1142 | u16 blocksize = inode->i_sb->s_blocksize; | |
1143 | u32 p_cluster, num_clusters; | |
1144 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1145 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1146 | u64 blkno; | |
1147 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1148 | |
1149 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1150 | ||
85db90e7 TM |
1151 | /* |
1152 | * In __ocfs2_xattr_set_value_outside has already been dirtied, | |
1153 | * so we don't need to worry about whether ocfs2_extend_trans | |
1154 | * will create a new transactio for us or not. | |
1155 | */ | |
cf1d6c76 | 1156 | credits = clusters * bpc; |
85db90e7 TM |
1157 | ret = ocfs2_extend_trans(handle, credits); |
1158 | if (ret) { | |
cf1d6c76 TY |
1159 | mlog_errno(ret); |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | while (cpos < clusters) { | |
1164 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1165 | &num_clusters, &xv->xr_list); | |
1166 | if (ret) { | |
1167 | mlog_errno(ret); | |
85db90e7 | 1168 | goto out; |
cf1d6c76 TY |
1169 | } |
1170 | ||
1171 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1172 | ||
1173 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 1174 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
1175 | if (ret) { |
1176 | mlog_errno(ret); | |
85db90e7 | 1177 | goto out; |
cf1d6c76 TY |
1178 | } |
1179 | ||
1180 | ret = ocfs2_journal_access(handle, | |
1181 | inode, | |
1182 | bh, | |
1183 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1184 | if (ret < 0) { | |
1185 | mlog_errno(ret); | |
85db90e7 | 1186 | goto out; |
cf1d6c76 TY |
1187 | } |
1188 | ||
1189 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1190 | memcpy(bh->b_data, value, cp_len); | |
1191 | value_len -= cp_len; | |
1192 | value += cp_len; | |
1193 | if (cp_len < blocksize) | |
1194 | memset(bh->b_data + cp_len, 0, | |
1195 | blocksize - cp_len); | |
1196 | ||
1197 | ret = ocfs2_journal_dirty(handle, bh); | |
1198 | if (ret < 0) { | |
1199 | mlog_errno(ret); | |
85db90e7 | 1200 | goto out; |
cf1d6c76 TY |
1201 | } |
1202 | brelse(bh); | |
1203 | bh = NULL; | |
1204 | ||
1205 | /* | |
1206 | * XXX: do we need to empty all the following | |
1207 | * blocks in this cluster? | |
1208 | */ | |
1209 | if (!value_len) | |
1210 | break; | |
1211 | } | |
1212 | cpos += num_clusters; | |
1213 | } | |
cf1d6c76 TY |
1214 | out: |
1215 | brelse(bh); | |
1216 | ||
1217 | return ret; | |
1218 | } | |
1219 | ||
1220 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1221 | handle_t *handle, |
cf1d6c76 TY |
1222 | struct ocfs2_xattr_info *xi, |
1223 | struct ocfs2_xattr_search *xs, | |
1224 | size_t offs) | |
1225 | { | |
cf1d6c76 TY |
1226 | int ret = 0; |
1227 | size_t name_len = strlen(xi->name); | |
1228 | void *val = xs->base + offs; | |
1229 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1230 | ||
cf1d6c76 TY |
1231 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
1232 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1233 | if (ret) { | |
1234 | mlog_errno(ret); | |
85db90e7 | 1235 | goto out; |
cf1d6c76 TY |
1236 | } |
1237 | /* Decrease xattr count */ | |
1238 | le16_add_cpu(&xs->header->xh_count, -1); | |
1239 | /* Remove the xattr entry and tree root which has already be set*/ | |
1240 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1241 | memset(val, 0, size); | |
1242 | ||
1243 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1244 | if (ret < 0) | |
1245 | mlog_errno(ret); | |
cf1d6c76 TY |
1246 | out: |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1251 | handle_t *handle, |
cf1d6c76 TY |
1252 | struct ocfs2_xattr_info *xi, |
1253 | struct ocfs2_xattr_search *xs, | |
1254 | size_t offs) | |
1255 | { | |
85db90e7 | 1256 | int ret; |
cf1d6c76 | 1257 | |
cf1d6c76 TY |
1258 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
1259 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1260 | if (ret) { | |
1261 | mlog_errno(ret); | |
85db90e7 | 1262 | goto out; |
cf1d6c76 TY |
1263 | } |
1264 | ||
1265 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1266 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1267 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1268 | ocfs2_xattr_set_local(xs->here, 1); | |
1269 | else | |
1270 | ocfs2_xattr_set_local(xs->here, 0); | |
1271 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1272 | ||
1273 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1274 | if (ret < 0) | |
1275 | mlog_errno(ret); | |
cf1d6c76 TY |
1276 | out: |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * ocfs2_xattr_set_value_outside() | |
1282 | * | |
1283 | * Set large size value in B tree. | |
1284 | */ | |
1285 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1286 | struct ocfs2_xattr_info *xi, | |
1287 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1288 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1289 | size_t offs) |
1290 | { | |
1291 | size_t name_len = strlen(xi->name); | |
1292 | void *val = xs->base + offs; | |
1293 | struct ocfs2_xattr_value_root *xv = NULL; | |
1294 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1295 | int ret = 0; | |
1296 | ||
1297 | memset(val, 0, size); | |
1298 | memcpy(val, xi->name, name_len); | |
1299 | xv = (struct ocfs2_xattr_value_root *) | |
1300 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1301 | xv->xr_clusters = 0; | |
1302 | xv->xr_last_eb_blk = 0; | |
1303 | xv->xr_list.l_tree_depth = 0; | |
1304 | xv->xr_list.l_count = cpu_to_le16(1); | |
1305 | xv->xr_list.l_next_free_rec = 0; | |
1306 | ||
1307 | ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
78f30c31 | 1308 | xi->value_len, ctxt); |
cf1d6c76 TY |
1309 | if (ret < 0) { |
1310 | mlog_errno(ret); | |
1311 | return ret; | |
1312 | } | |
85db90e7 | 1313 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, offs); |
cf1d6c76 TY |
1314 | if (ret < 0) { |
1315 | mlog_errno(ret); | |
1316 | return ret; | |
1317 | } | |
85db90e7 TM |
1318 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, xv, |
1319 | xi->value, xi->value_len); | |
cf1d6c76 TY |
1320 | if (ret < 0) |
1321 | mlog_errno(ret); | |
1322 | ||
1323 | return ret; | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * ocfs2_xattr_set_entry_local() | |
1328 | * | |
1329 | * Set, replace or remove extended attribute in local. | |
1330 | */ | |
1331 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1332 | struct ocfs2_xattr_info *xi, | |
1333 | struct ocfs2_xattr_search *xs, | |
1334 | struct ocfs2_xattr_entry *last, | |
1335 | size_t min_offs) | |
1336 | { | |
1337 | size_t name_len = strlen(xi->name); | |
1338 | int i; | |
1339 | ||
1340 | if (xi->value && xs->not_found) { | |
1341 | /* Insert the new xattr entry. */ | |
1342 | le16_add_cpu(&xs->header->xh_count, 1); | |
1343 | ocfs2_xattr_set_type(last, xi->name_index); | |
1344 | ocfs2_xattr_set_local(last, 1); | |
1345 | last->xe_name_len = name_len; | |
1346 | } else { | |
1347 | void *first_val; | |
1348 | void *val; | |
1349 | size_t offs, size; | |
1350 | ||
1351 | first_val = xs->base + min_offs; | |
1352 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1353 | val = xs->base + offs; | |
1354 | ||
1355 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1356 | OCFS2_XATTR_INLINE_SIZE) | |
1357 | size = OCFS2_XATTR_SIZE(name_len) + | |
1358 | OCFS2_XATTR_ROOT_SIZE; | |
1359 | else | |
1360 | size = OCFS2_XATTR_SIZE(name_len) + | |
1361 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1362 | ||
1363 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1364 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1365 | /* The old and the new value have the | |
1366 | same size. Just replace the value. */ | |
1367 | ocfs2_xattr_set_local(xs->here, 1); | |
1368 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1369 | /* Clear value bytes. */ | |
1370 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1371 | 0, | |
1372 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1373 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1374 | xi->value, | |
1375 | xi->value_len); | |
1376 | return; | |
1377 | } | |
1378 | /* Remove the old name+value. */ | |
1379 | memmove(first_val + size, first_val, val - first_val); | |
1380 | memset(first_val, 0, size); | |
1381 | xs->here->xe_name_hash = 0; | |
1382 | xs->here->xe_name_offset = 0; | |
1383 | ocfs2_xattr_set_local(xs->here, 1); | |
1384 | xs->here->xe_value_size = 0; | |
1385 | ||
1386 | min_offs += size; | |
1387 | ||
1388 | /* Adjust all value offsets. */ | |
1389 | last = xs->header->xh_entries; | |
1390 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1391 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1392 | ||
1393 | if (o < offs) | |
1394 | last->xe_name_offset = cpu_to_le16(o + size); | |
1395 | last += 1; | |
1396 | } | |
1397 | ||
1398 | if (!xi->value) { | |
1399 | /* Remove the old entry. */ | |
1400 | last -= 1; | |
1401 | memmove(xs->here, xs->here + 1, | |
1402 | (void *)last - (void *)xs->here); | |
1403 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1404 | le16_add_cpu(&xs->header->xh_count, -1); | |
1405 | } | |
1406 | } | |
1407 | if (xi->value) { | |
1408 | /* Insert the new name+value. */ | |
1409 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1410 | OCFS2_XATTR_SIZE(xi->value_len); | |
1411 | void *val = xs->base + min_offs - size; | |
1412 | ||
1413 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1414 | memset(val, 0, size); | |
1415 | memcpy(val, xi->name, name_len); | |
1416 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1417 | xi->value, | |
1418 | xi->value_len); | |
1419 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1420 | ocfs2_xattr_set_local(xs->here, 1); | |
1421 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1422 | } | |
1423 | ||
1424 | return; | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * ocfs2_xattr_set_entry() | |
1429 | * | |
1430 | * Set extended attribute entry into inode or block. | |
1431 | * | |
1432 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1433 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1434 | * then set value in B tree with set_value_outside(). | |
1435 | */ | |
1436 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1437 | struct ocfs2_xattr_info *xi, | |
1438 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1439 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1440 | int flag) |
1441 | { | |
1442 | struct ocfs2_xattr_entry *last; | |
1443 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1444 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1445 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1446 | size_t size_l = 0; | |
85db90e7 | 1447 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1448 | int free, i, ret; |
1449 | struct ocfs2_xattr_info xi_l = { | |
1450 | .name_index = xi->name_index, | |
1451 | .name = xi->name, | |
1452 | .value = xi->value, | |
1453 | .value_len = xi->value_len, | |
1454 | }; | |
1455 | ||
1456 | /* Compute min_offs, last and free space. */ | |
1457 | last = xs->header->xh_entries; | |
1458 | ||
1459 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1460 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1461 | if (offs < min_offs) | |
1462 | min_offs = offs; | |
1463 | last += 1; | |
1464 | } | |
1465 | ||
1466 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1467 | if (free < 0) | |
b37c4d84 | 1468 | return -EIO; |
cf1d6c76 TY |
1469 | |
1470 | if (!xs->not_found) { | |
1471 | size_t size = 0; | |
1472 | if (ocfs2_xattr_is_local(xs->here)) | |
1473 | size = OCFS2_XATTR_SIZE(name_len) + | |
1474 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1475 | else | |
1476 | size = OCFS2_XATTR_SIZE(name_len) + | |
1477 | OCFS2_XATTR_ROOT_SIZE; | |
1478 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1479 | } | |
1480 | /* Check free space in inode or block */ | |
1481 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1482 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1483 | OCFS2_XATTR_SIZE(name_len) + | |
1484 | OCFS2_XATTR_ROOT_SIZE) { | |
1485 | ret = -ENOSPC; | |
1486 | goto out; | |
1487 | } | |
1488 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1489 | xi_l.value = (void *)&def_xv; | |
1490 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1491 | } else if (xi->value) { | |
1492 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1493 | OCFS2_XATTR_SIZE(name_len) + | |
1494 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1495 | ret = -ENOSPC; | |
1496 | goto out; | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | if (!xs->not_found) { | |
1501 | /* For existing extended attribute */ | |
1502 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1503 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1504 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1505 | void *val = xs->base + offs; | |
1506 | ||
1507 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1508 | /* Replace existing local xattr with tree root */ | |
1509 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
78f30c31 | 1510 | ctxt, offs); |
cf1d6c76 TY |
1511 | if (ret < 0) |
1512 | mlog_errno(ret); | |
1513 | goto out; | |
1514 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1515 | /* For existing xattr which has value outside */ | |
1516 | struct ocfs2_xattr_value_root *xv = NULL; | |
1517 | xv = (struct ocfs2_xattr_value_root *)(val + | |
1518 | OCFS2_XATTR_SIZE(name_len)); | |
1519 | ||
1520 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1521 | /* | |
1522 | * If new value need set outside also, | |
1523 | * first truncate old value to new value, | |
1524 | * then set new value with set_value_outside(). | |
1525 | */ | |
1526 | ret = ocfs2_xattr_value_truncate(inode, | |
1527 | xs->xattr_bh, | |
1528 | xv, | |
78f30c31 TM |
1529 | xi->value_len, |
1530 | ctxt); | |
cf1d6c76 TY |
1531 | if (ret < 0) { |
1532 | mlog_errno(ret); | |
1533 | goto out; | |
1534 | } | |
1535 | ||
85db90e7 TM |
1536 | ret = ocfs2_xattr_update_entry(inode, |
1537 | handle, | |
1538 | xi, | |
1539 | xs, | |
1540 | offs); | |
cf1d6c76 TY |
1541 | if (ret < 0) { |
1542 | mlog_errno(ret); | |
1543 | goto out; | |
1544 | } | |
1545 | ||
85db90e7 TM |
1546 | ret = __ocfs2_xattr_set_value_outside(inode, |
1547 | handle, | |
1548 | xv, | |
1549 | xi->value, | |
1550 | xi->value_len); | |
cf1d6c76 TY |
1551 | if (ret < 0) |
1552 | mlog_errno(ret); | |
1553 | goto out; | |
1554 | } else { | |
1555 | /* | |
1556 | * If new value need set in local, | |
1557 | * just trucate old value to zero. | |
1558 | */ | |
1559 | ret = ocfs2_xattr_value_truncate(inode, | |
85db90e7 TM |
1560 | xs->xattr_bh, |
1561 | xv, | |
1562 | 0, | |
1563 | ctxt); | |
cf1d6c76 TY |
1564 | if (ret < 0) |
1565 | mlog_errno(ret); | |
1566 | } | |
1567 | } | |
1568 | } | |
1569 | ||
cf1d6c76 TY |
1570 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, |
1571 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1572 | if (ret) { | |
1573 | mlog_errno(ret); | |
85db90e7 | 1574 | goto out; |
cf1d6c76 TY |
1575 | } |
1576 | ||
1577 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
cf1d6c76 TY |
1578 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
1579 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1580 | if (ret) { | |
1581 | mlog_errno(ret); | |
85db90e7 | 1582 | goto out; |
cf1d6c76 TY |
1583 | } |
1584 | } | |
1585 | ||
1586 | /* | |
1587 | * Set value in local, include set tree root in local. | |
1588 | * This is the first step for value size >INLINE_SIZE. | |
1589 | */ | |
1590 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1591 | ||
1592 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1593 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1594 | if (ret < 0) { | |
1595 | mlog_errno(ret); | |
85db90e7 | 1596 | goto out; |
cf1d6c76 TY |
1597 | } |
1598 | } | |
1599 | ||
1600 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1601 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1602 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1603 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1604 | ||
1605 | /* | |
1606 | * Adjust extent record count or inline data size | |
1607 | * to reserve space for extended attribute. | |
1608 | */ | |
1609 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1610 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1611 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1612 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1613 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1614 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1615 | sizeof(struct ocfs2_extent_rec))); | |
1616 | } | |
1617 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1618 | } | |
1619 | /* Update xattr flag */ | |
1620 | spin_lock(&oi->ip_lock); | |
1621 | oi->ip_dyn_features |= flag; | |
1622 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1623 | spin_unlock(&oi->ip_lock); | |
1624 | /* Update inode ctime */ | |
1625 | inode->i_ctime = CURRENT_TIME; | |
1626 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1627 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1628 | ||
1629 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1630 | if (ret < 0) | |
1631 | mlog_errno(ret); | |
1632 | ||
cf1d6c76 TY |
1633 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1634 | /* | |
1635 | * Set value outside in B tree. | |
1636 | * This is the second step for value size > INLINE_SIZE. | |
1637 | */ | |
1638 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
78f30c31 | 1639 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs); |
cf1d6c76 TY |
1640 | if (ret < 0) { |
1641 | int ret2; | |
1642 | ||
1643 | mlog_errno(ret); | |
1644 | /* | |
1645 | * If set value outside failed, we have to clean | |
1646 | * the junk tree root we have already set in local. | |
1647 | */ | |
85db90e7 TM |
1648 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
1649 | xi, xs, offs); | |
cf1d6c76 TY |
1650 | if (ret2 < 0) |
1651 | mlog_errno(ret2); | |
1652 | } | |
1653 | } | |
1654 | out: | |
1655 | return ret; | |
cf1d6c76 TY |
1656 | } |
1657 | ||
cf1d6c76 TY |
1658 | static int ocfs2_remove_value_outside(struct inode*inode, |
1659 | struct buffer_head *bh, | |
1660 | struct ocfs2_xattr_header *header) | |
1661 | { | |
1662 | int ret = 0, i; | |
78f30c31 TM |
1663 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1664 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
1665 | ||
1666 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 | 1667 | |
85db90e7 TM |
1668 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); |
1669 | if (IS_ERR(ctxt.handle)) { | |
1670 | ret = PTR_ERR(ctxt.handle); | |
1671 | mlog_errno(ret); | |
1672 | goto out; | |
1673 | } | |
1674 | ||
cf1d6c76 TY |
1675 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
1676 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1677 | ||
1678 | if (!ocfs2_xattr_is_local(entry)) { | |
1679 | struct ocfs2_xattr_value_root *xv; | |
1680 | void *val; | |
1681 | ||
1682 | val = (void *)header + | |
1683 | le16_to_cpu(entry->xe_name_offset); | |
1684 | xv = (struct ocfs2_xattr_value_root *) | |
1685 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
78f30c31 TM |
1686 | ret = ocfs2_xattr_value_truncate(inode, bh, xv, |
1687 | 0, &ctxt); | |
cf1d6c76 TY |
1688 | if (ret < 0) { |
1689 | mlog_errno(ret); | |
78f30c31 | 1690 | break; |
cf1d6c76 TY |
1691 | } |
1692 | } | |
1693 | } | |
1694 | ||
85db90e7 | 1695 | ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
1696 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1697 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 1698 | out: |
cf1d6c76 TY |
1699 | return ret; |
1700 | } | |
1701 | ||
1702 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1703 | struct buffer_head *di_bh) | |
1704 | { | |
1705 | ||
1706 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1707 | struct ocfs2_xattr_header *header; | |
1708 | int ret; | |
1709 | ||
1710 | header = (struct ocfs2_xattr_header *) | |
1711 | ((void *)di + inode->i_sb->s_blocksize - | |
1712 | le16_to_cpu(di->i_xattr_inline_size)); | |
1713 | ||
1714 | ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1715 | ||
1716 | return ret; | |
1717 | } | |
1718 | ||
1719 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1720 | struct buffer_head *blk_bh) | |
1721 | { | |
1722 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 TY |
1723 | int ret = 0; |
1724 | ||
1725 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1726 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1727 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
1728 | ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1729 | } else | |
1730 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1731 | |
1732 | return ret; | |
1733 | } | |
1734 | ||
08413899 TM |
1735 | static int ocfs2_xattr_free_block(struct inode *inode, |
1736 | u64 block) | |
1737 | { | |
1738 | struct inode *xb_alloc_inode; | |
1739 | struct buffer_head *xb_alloc_bh = NULL; | |
1740 | struct buffer_head *blk_bh = NULL; | |
1741 | struct ocfs2_xattr_block *xb; | |
1742 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1743 | handle_t *handle; | |
1744 | int ret = 0; | |
1745 | u64 blk, bg_blkno; | |
1746 | u16 bit; | |
1747 | ||
4ae1d69b | 1748 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1749 | if (ret < 0) { |
1750 | mlog_errno(ret); | |
1751 | goto out; | |
1752 | } | |
1753 | ||
08413899 TM |
1754 | ret = ocfs2_xattr_block_remove(inode, blk_bh); |
1755 | if (ret < 0) { | |
1756 | mlog_errno(ret); | |
1757 | goto out; | |
1758 | } | |
1759 | ||
4ae1d69b | 1760 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1761 | blk = le64_to_cpu(xb->xb_blkno); |
1762 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1763 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1764 | ||
1765 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1766 | EXTENT_ALLOC_SYSTEM_INODE, | |
1767 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1768 | if (!xb_alloc_inode) { | |
1769 | ret = -ENOMEM; | |
1770 | mlog_errno(ret); | |
1771 | goto out; | |
1772 | } | |
1773 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1774 | ||
1775 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1776 | if (ret < 0) { | |
1777 | mlog_errno(ret); | |
1778 | goto out_mutex; | |
1779 | } | |
1780 | ||
1781 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1782 | if (IS_ERR(handle)) { | |
1783 | ret = PTR_ERR(handle); | |
1784 | mlog_errno(ret); | |
1785 | goto out_unlock; | |
1786 | } | |
1787 | ||
1788 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1789 | bit, bg_blkno, 1); | |
1790 | if (ret < 0) | |
1791 | mlog_errno(ret); | |
1792 | ||
1793 | ocfs2_commit_trans(osb, handle); | |
1794 | out_unlock: | |
1795 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1796 | brelse(xb_alloc_bh); | |
1797 | out_mutex: | |
1798 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1799 | iput(xb_alloc_inode); | |
1800 | out: | |
1801 | brelse(blk_bh); | |
1802 | return ret; | |
1803 | } | |
1804 | ||
cf1d6c76 TY |
1805 | /* |
1806 | * ocfs2_xattr_remove() | |
1807 | * | |
1808 | * Free extended attribute resources associated with this inode. | |
1809 | */ | |
1810 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1811 | { | |
cf1d6c76 TY |
1812 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1813 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1814 | handle_t *handle; | |
1815 | int ret; | |
1816 | ||
8154da3d TY |
1817 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1818 | return 0; | |
1819 | ||
cf1d6c76 TY |
1820 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1821 | return 0; | |
1822 | ||
1823 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1824 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1825 | if (ret < 0) { | |
1826 | mlog_errno(ret); | |
1827 | goto out; | |
1828 | } | |
1829 | } | |
cf1d6c76 | 1830 | |
08413899 TM |
1831 | if (di->i_xattr_loc) { |
1832 | ret = ocfs2_xattr_free_block(inode, | |
1833 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1834 | if (ret < 0) { |
1835 | mlog_errno(ret); | |
1836 | goto out; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1841 | OCFS2_INODE_UPDATE_CREDITS); | |
1842 | if (IS_ERR(handle)) { | |
1843 | ret = PTR_ERR(handle); | |
1844 | mlog_errno(ret); | |
1845 | goto out; | |
1846 | } | |
1847 | ret = ocfs2_journal_access(handle, inode, di_bh, | |
1848 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1849 | if (ret) { | |
1850 | mlog_errno(ret); | |
1851 | goto out_commit; | |
1852 | } | |
1853 | ||
08413899 | 1854 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1855 | |
1856 | spin_lock(&oi->ip_lock); | |
1857 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1858 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1859 | spin_unlock(&oi->ip_lock); | |
1860 | ||
1861 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1862 | if (ret < 0) | |
1863 | mlog_errno(ret); | |
1864 | out_commit: | |
1865 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1866 | out: | |
cf1d6c76 TY |
1867 | return ret; |
1868 | } | |
1869 | ||
1870 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1871 | struct ocfs2_dinode *di) | |
1872 | { | |
1873 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1874 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1875 | int free; | |
1876 | ||
1877 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1878 | return 0; | |
1879 | ||
1880 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1881 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1882 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1883 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1884 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1885 | le64_to_cpu(di->i_size); | |
1886 | } else { | |
1887 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1888 | free = (le16_to_cpu(el->l_count) - | |
1889 | le16_to_cpu(el->l_next_free_rec)) * | |
1890 | sizeof(struct ocfs2_extent_rec); | |
1891 | } | |
1892 | if (free >= xattrsize) | |
1893 | return 1; | |
1894 | ||
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * ocfs2_xattr_ibody_find() | |
1900 | * | |
1901 | * Find extended attribute in inode block and | |
1902 | * fill search info into struct ocfs2_xattr_search. | |
1903 | */ | |
1904 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1905 | int name_index, | |
1906 | const char *name, | |
1907 | struct ocfs2_xattr_search *xs) | |
1908 | { | |
1909 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1910 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1911 | int ret; | |
1912 | int has_space = 0; | |
1913 | ||
1914 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1915 | return 0; | |
1916 | ||
1917 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1918 | down_read(&oi->ip_alloc_sem); | |
1919 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1920 | up_read(&oi->ip_alloc_sem); | |
1921 | if (!has_space) | |
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | xs->xattr_bh = xs->inode_bh; | |
1926 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1927 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1928 | xs->header = (struct ocfs2_xattr_header *) | |
1929 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1930 | else | |
1931 | xs->header = (struct ocfs2_xattr_header *) | |
1932 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1933 | xs->base = (void *)xs->header; | |
1934 | xs->here = xs->header->xh_entries; | |
1935 | ||
1936 | /* Find the named attribute. */ | |
1937 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1938 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1939 | if (ret && ret != -ENODATA) | |
1940 | return ret; | |
1941 | xs->not_found = ret; | |
1942 | } | |
1943 | ||
1944 | return 0; | |
1945 | } | |
1946 | ||
1947 | /* | |
1948 | * ocfs2_xattr_ibody_set() | |
1949 | * | |
1950 | * Set, replace or remove an extended attribute into inode block. | |
1951 | * | |
1952 | */ | |
1953 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
1954 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
1955 | struct ocfs2_xattr_search *xs, |
1956 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
1957 | { |
1958 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1959 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1960 | int ret; | |
1961 | ||
1962 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1963 | return -ENOSPC; | |
1964 | ||
1965 | down_write(&oi->ip_alloc_sem); | |
1966 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1967 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
1968 | ret = -ENOSPC; | |
1969 | goto out; | |
1970 | } | |
1971 | } | |
1972 | ||
78f30c31 | 1973 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
1974 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
1975 | out: | |
1976 | up_write(&oi->ip_alloc_sem); | |
1977 | ||
1978 | return ret; | |
1979 | } | |
1980 | ||
1981 | /* | |
1982 | * ocfs2_xattr_block_find() | |
1983 | * | |
1984 | * Find extended attribute in external block and | |
1985 | * fill search info into struct ocfs2_xattr_search. | |
1986 | */ | |
1987 | static int ocfs2_xattr_block_find(struct inode *inode, | |
1988 | int name_index, | |
1989 | const char *name, | |
1990 | struct ocfs2_xattr_search *xs) | |
1991 | { | |
1992 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1993 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 1994 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1995 | int ret = 0; |
1996 | ||
1997 | if (!di->i_xattr_loc) | |
1998 | return ret; | |
1999 | ||
4ae1d69b JB |
2000 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2001 | &blk_bh); | |
cf1d6c76 TY |
2002 | if (ret < 0) { |
2003 | mlog_errno(ret); | |
2004 | return ret; | |
2005 | } | |
f6087fb7 | 2006 | |
cf1d6c76 | 2007 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2008 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2009 | |
2010 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2011 | xs->header = &xb->xb_attrs.xb_header; | |
2012 | xs->base = (void *)xs->header; | |
2013 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2014 | xs->here = xs->header->xh_entries; | |
2015 | ||
2016 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2017 | } else | |
2018 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2019 | name_index, | |
2020 | name, xs); | |
cf1d6c76 | 2021 | |
cf1d6c76 TY |
2022 | if (ret && ret != -ENODATA) { |
2023 | xs->xattr_bh = NULL; | |
2024 | goto cleanup; | |
2025 | } | |
2026 | xs->not_found = ret; | |
2027 | return 0; | |
cf1d6c76 TY |
2028 | cleanup: |
2029 | brelse(blk_bh); | |
2030 | ||
2031 | return ret; | |
2032 | } | |
2033 | ||
2034 | /* | |
2035 | * ocfs2_xattr_block_set() | |
2036 | * | |
2037 | * Set, replace or remove an extended attribute into external block. | |
2038 | * | |
2039 | */ | |
2040 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2041 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2042 | struct ocfs2_xattr_search *xs, |
2043 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2044 | { |
2045 | struct buffer_head *new_bh = NULL; | |
2046 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2047 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
85db90e7 | 2048 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
2049 | struct ocfs2_xattr_block *xblk = NULL; |
2050 | u16 suballoc_bit_start; | |
2051 | u32 num_got; | |
2052 | u64 first_blkno; | |
2053 | int ret; | |
2054 | ||
2055 | if (!xs->xattr_bh) { | |
cf1d6c76 TY |
2056 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, |
2057 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2058 | if (ret < 0) { | |
2059 | mlog_errno(ret); | |
85db90e7 | 2060 | goto end; |
cf1d6c76 TY |
2061 | } |
2062 | ||
78f30c31 | 2063 | ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, |
cf1d6c76 TY |
2064 | &suballoc_bit_start, &num_got, |
2065 | &first_blkno); | |
2066 | if (ret < 0) { | |
2067 | mlog_errno(ret); | |
85db90e7 | 2068 | goto end; |
cf1d6c76 TY |
2069 | } |
2070 | ||
2071 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2072 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
2073 | ||
2074 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
2075 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2076 | if (ret < 0) { | |
2077 | mlog_errno(ret); | |
85db90e7 | 2078 | goto end; |
cf1d6c76 TY |
2079 | } |
2080 | ||
2081 | /* Initialize ocfs2_xattr_block */ | |
2082 | xs->xattr_bh = new_bh; | |
2083 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2084 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2085 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2086 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2087 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2088 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2089 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2090 | ||
2091 | xs->header = &xblk->xb_attrs.xb_header; | |
2092 | xs->base = (void *)xs->header; | |
2093 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2094 | xs->here = xs->header->xh_entries; | |
2095 | ||
cf1d6c76 TY |
2096 | ret = ocfs2_journal_dirty(handle, new_bh); |
2097 | if (ret < 0) { | |
2098 | mlog_errno(ret); | |
85db90e7 | 2099 | goto end; |
cf1d6c76 TY |
2100 | } |
2101 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
85db90e7 | 2102 | ocfs2_journal_dirty(handle, xs->inode_bh); |
01225596 TM |
2103 | } else |
2104 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2105 | ||
2106 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2107 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2108 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2109 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2110 | if (!ret || ret != -ENOSPC) |
2111 | goto end; | |
2112 | ||
78f30c31 | 2113 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2114 | if (ret) |
2115 | goto end; | |
cf1d6c76 TY |
2116 | } |
2117 | ||
78f30c31 | 2118 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2119 | |
2120 | end: | |
cf1d6c76 TY |
2121 | |
2122 | return ret; | |
2123 | } | |
2124 | ||
78f30c31 TM |
2125 | /* Check whether the new xattr can be inserted into the inode. */ |
2126 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2127 | struct ocfs2_xattr_info *xi, | |
2128 | struct ocfs2_xattr_search *xs) | |
2129 | { | |
2130 | u64 value_size; | |
2131 | struct ocfs2_xattr_entry *last; | |
2132 | int free, i; | |
2133 | size_t min_offs = xs->end - xs->base; | |
2134 | ||
2135 | if (!xs->header) | |
2136 | return 0; | |
2137 | ||
2138 | last = xs->header->xh_entries; | |
2139 | ||
2140 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2141 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2142 | if (offs < min_offs) | |
2143 | min_offs = offs; | |
2144 | last += 1; | |
2145 | } | |
2146 | ||
2147 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
2148 | if (free < 0) | |
2149 | return 0; | |
2150 | ||
2151 | BUG_ON(!xs->not_found); | |
2152 | ||
2153 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2154 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2155 | else | |
2156 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2157 | ||
2158 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2159 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2160 | return 1; | |
2161 | ||
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2166 | struct ocfs2_dinode *di, | |
2167 | struct ocfs2_xattr_info *xi, | |
2168 | struct ocfs2_xattr_search *xis, | |
2169 | struct ocfs2_xattr_search *xbs, | |
2170 | int *clusters_need, | |
85db90e7 TM |
2171 | int *meta_need, |
2172 | int *credits_need) | |
78f30c31 TM |
2173 | { |
2174 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2175 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2176 | struct buffer_head *bh = NULL; |
2177 | struct ocfs2_xattr_block *xb = NULL; | |
2178 | struct ocfs2_xattr_entry *xe = NULL; | |
2179 | struct ocfs2_xattr_value_root *xv = NULL; | |
2180 | char *base = NULL; | |
2181 | int name_offset, name_len = 0; | |
2182 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2183 | xi->value_len); | |
2184 | u64 value_size; | |
2185 | ||
78f30c31 | 2186 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2187 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2188 | ||
2189 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2190 | clusters_add += new_clusters; |
85db90e7 TM |
2191 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2192 | &def_xv.xv.xr_list, | |
2193 | new_clusters); | |
2194 | } | |
78f30c31 TM |
2195 | |
2196 | goto meta_guess; | |
2197 | } | |
2198 | ||
2199 | if (!xis->not_found) { | |
2200 | xe = xis->here; | |
2201 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2202 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2203 | base = xis->base; | |
85db90e7 | 2204 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2205 | } else { |
970e4936 | 2206 | int i, block_off = 0; |
78f30c31 TM |
2207 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2208 | xe = xbs->here; | |
2209 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2210 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2211 | i = xbs->here - xbs->header->xh_entries; | |
2212 | old_in_xb = 1; | |
2213 | ||
2214 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2215 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2216 | bucket_xh(xbs->bucket), | |
2217 | i, &block_off, | |
2218 | &name_offset); | |
2219 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2220 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2221 | } else { | |
78f30c31 | 2222 | base = xbs->base; |
85db90e7 TM |
2223 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2224 | } | |
2225 | } | |
2226 | ||
2227 | /* | |
2228 | * delete a xattr doesn't need metadata and cluster allocation. | |
2229 | * so just calculate the credits and return. | |
2230 | * | |
2231 | * The credits for removing the value tree will be extended | |
2232 | * by ocfs2_remove_extent itself. | |
2233 | */ | |
2234 | if (!xi->value) { | |
2235 | if (!ocfs2_xattr_is_local(xe)) | |
2236 | credits += OCFS2_REMOVE_EXTENT_CREDITS; | |
2237 | ||
2238 | goto out; | |
78f30c31 TM |
2239 | } |
2240 | ||
2241 | /* do cluster allocation guess first. */ | |
2242 | value_size = le64_to_cpu(xe->xe_value_size); | |
2243 | ||
2244 | if (old_in_xb) { | |
2245 | /* | |
2246 | * In xattr set, we always try to set the xe in inode first, | |
2247 | * so if it can be inserted into inode successfully, the old | |
2248 | * one will be removed from the xattr block, and this xattr | |
2249 | * will be inserted into inode as a new xattr in inode. | |
2250 | */ | |
2251 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2252 | clusters_add += new_clusters; | |
85db90e7 TM |
2253 | credits += OCFS2_REMOVE_EXTENT_CREDITS + |
2254 | OCFS2_INODE_UPDATE_CREDITS; | |
2255 | if (!ocfs2_xattr_is_local(xe)) | |
2256 | credits += ocfs2_calc_extend_credits( | |
2257 | inode->i_sb, | |
2258 | &def_xv.xv.xr_list, | |
2259 | new_clusters); | |
78f30c31 TM |
2260 | goto out; |
2261 | } | |
2262 | } | |
2263 | ||
2264 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2265 | /* the new values will be stored outside. */ | |
2266 | u32 old_clusters = 0; | |
2267 | ||
2268 | if (!ocfs2_xattr_is_local(xe)) { | |
2269 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2270 | value_size); | |
2271 | xv = (struct ocfs2_xattr_value_root *) | |
2272 | (base + name_offset + name_len); | |
97aff52a | 2273 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2274 | } else |
2275 | xv = &def_xv.xv; | |
2276 | ||
85db90e7 TM |
2277 | if (old_clusters >= new_clusters) { |
2278 | credits += OCFS2_REMOVE_EXTENT_CREDITS; | |
78f30c31 | 2279 | goto out; |
85db90e7 | 2280 | } else { |
78f30c31 TM |
2281 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2282 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2283 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2284 | &xv->xr_list, | |
2285 | new_clusters - | |
2286 | old_clusters); | |
97aff52a TM |
2287 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2288 | goto out; | |
78f30c31 TM |
2289 | } |
2290 | } else { | |
2291 | /* | |
2292 | * Now the new value will be stored inside. So if the new | |
2293 | * value is smaller than the size of value root or the old | |
2294 | * value, we don't need any allocation, otherwise we have | |
2295 | * to guess metadata allocation. | |
2296 | */ | |
2297 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2298 | (!ocfs2_xattr_is_local(xe) && | |
2299 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2300 | goto out; | |
2301 | } | |
2302 | ||
2303 | meta_guess: | |
2304 | /* calculate metadata allocation. */ | |
2305 | if (di->i_xattr_loc) { | |
2306 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2307 | ret = ocfs2_read_xattr_block(inode, |
2308 | le64_to_cpu(di->i_xattr_loc), | |
2309 | &bh); | |
78f30c31 TM |
2310 | if (ret) { |
2311 | mlog_errno(ret); | |
2312 | goto out; | |
2313 | } | |
2314 | ||
2315 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2316 | } else | |
2317 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2318 | ||
2319 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2320 | struct ocfs2_extent_list *el = | |
2321 | &xb->xb_attrs.xb_root.xt_list; | |
2322 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2323 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2324 | el, 1); | |
78f30c31 TM |
2325 | } |
2326 | ||
2327 | /* | |
2328 | * This cluster will be used either for new bucket or for | |
2329 | * new xattr block. | |
2330 | * If the cluster size is the same as the bucket size, one | |
2331 | * more is needed since we may need to extend the bucket | |
2332 | * also. | |
2333 | */ | |
2334 | clusters_add += 1; | |
85db90e7 | 2335 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2336 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2337 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2338 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2339 | clusters_add += 1; |
85db90e7 TM |
2340 | } |
2341 | } else { | |
78f30c31 | 2342 | meta_add += 1; |
85db90e7 TM |
2343 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2344 | } | |
78f30c31 TM |
2345 | out: |
2346 | if (clusters_need) | |
2347 | *clusters_need = clusters_add; | |
2348 | if (meta_need) | |
2349 | *meta_need = meta_add; | |
85db90e7 TM |
2350 | if (credits_need) |
2351 | *credits_need = credits; | |
78f30c31 TM |
2352 | brelse(bh); |
2353 | return ret; | |
2354 | } | |
2355 | ||
2356 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2357 | struct ocfs2_dinode *di, | |
2358 | struct ocfs2_xattr_info *xi, | |
2359 | struct ocfs2_xattr_search *xis, | |
2360 | struct ocfs2_xattr_search *xbs, | |
85db90e7 TM |
2361 | struct ocfs2_xattr_set_ctxt *ctxt, |
2362 | int *credits) | |
78f30c31 TM |
2363 | { |
2364 | int clusters_add, meta_add, ret; | |
2365 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2366 | ||
2367 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2368 | ||
2369 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2370 | ||
2371 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2372 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2373 | if (ret) { |
2374 | mlog_errno(ret); | |
2375 | return ret; | |
2376 | } | |
2377 | ||
85db90e7 TM |
2378 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2379 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2380 | |
2381 | if (meta_add) { | |
2382 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2383 | &ctxt->meta_ac); | |
2384 | if (ret) { | |
2385 | mlog_errno(ret); | |
2386 | goto out; | |
2387 | } | |
2388 | } | |
2389 | ||
2390 | if (clusters_add) { | |
2391 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2392 | if (ret) | |
2393 | mlog_errno(ret); | |
2394 | } | |
2395 | out: | |
2396 | if (ret) { | |
2397 | if (ctxt->meta_ac) { | |
2398 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2399 | ctxt->meta_ac = NULL; | |
2400 | } | |
2401 | ||
2402 | /* | |
2403 | * We cannot have an error and a non null ctxt->data_ac. | |
2404 | */ | |
2405 | } | |
2406 | ||
2407 | return ret; | |
2408 | } | |
2409 | ||
85db90e7 TM |
2410 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2411 | struct ocfs2_dinode *di, | |
2412 | struct ocfs2_xattr_info *xi, | |
2413 | struct ocfs2_xattr_search *xis, | |
2414 | struct ocfs2_xattr_search *xbs, | |
2415 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2416 | { | |
9f868f16 | 2417 | int ret = 0, credits, old_found; |
85db90e7 TM |
2418 | |
2419 | if (!xi->value) { | |
2420 | /* Remove existing extended attribute */ | |
2421 | if (!xis->not_found) | |
2422 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2423 | else if (!xbs->not_found) | |
2424 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2425 | } else { | |
2426 | /* We always try to set extended attribute into inode first*/ | |
2427 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2428 | if (!ret && !xbs->not_found) { | |
2429 | /* | |
2430 | * If succeed and that extended attribute existing in | |
2431 | * external block, then we will remove it. | |
2432 | */ | |
2433 | xi->value = NULL; | |
2434 | xi->value_len = 0; | |
2435 | ||
9f868f16 | 2436 | old_found = xis->not_found; |
85db90e7 TM |
2437 | xis->not_found = -ENODATA; |
2438 | ret = ocfs2_calc_xattr_set_need(inode, | |
2439 | di, | |
2440 | xi, | |
2441 | xis, | |
2442 | xbs, | |
2443 | NULL, | |
2444 | NULL, | |
2445 | &credits); | |
9f868f16 | 2446 | xis->not_found = old_found; |
85db90e7 TM |
2447 | if (ret) { |
2448 | mlog_errno(ret); | |
2449 | goto out; | |
2450 | } | |
2451 | ||
2452 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2453 | ctxt->handle->h_buffer_credits); | |
2454 | if (ret) { | |
2455 | mlog_errno(ret); | |
2456 | goto out; | |
2457 | } | |
2458 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2459 | } else if (ret == -ENOSPC) { | |
2460 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2461 | ret = ocfs2_xattr_block_find(inode, | |
2462 | xi->name_index, | |
2463 | xi->name, xbs); | |
2464 | if (ret) | |
2465 | goto out; | |
2466 | ||
9f868f16 | 2467 | old_found = xis->not_found; |
85db90e7 TM |
2468 | xis->not_found = -ENODATA; |
2469 | ret = ocfs2_calc_xattr_set_need(inode, | |
2470 | di, | |
2471 | xi, | |
2472 | xis, | |
2473 | xbs, | |
2474 | NULL, | |
2475 | NULL, | |
2476 | &credits); | |
9f868f16 | 2477 | xis->not_found = old_found; |
85db90e7 TM |
2478 | if (ret) { |
2479 | mlog_errno(ret); | |
2480 | goto out; | |
2481 | } | |
2482 | ||
2483 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2484 | ctxt->handle->h_buffer_credits); | |
2485 | if (ret) { | |
2486 | mlog_errno(ret); | |
2487 | goto out; | |
2488 | } | |
2489 | } | |
2490 | /* | |
2491 | * If no space in inode, we will set extended attribute | |
2492 | * into external block. | |
2493 | */ | |
2494 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2495 | if (ret) | |
2496 | goto out; | |
2497 | if (!xis->not_found) { | |
2498 | /* | |
2499 | * If succeed and that extended attribute | |
2500 | * existing in inode, we will remove it. | |
2501 | */ | |
2502 | xi->value = NULL; | |
2503 | xi->value_len = 0; | |
2504 | xbs->not_found = -ENODATA; | |
2505 | ret = ocfs2_calc_xattr_set_need(inode, | |
2506 | di, | |
2507 | xi, | |
2508 | xis, | |
2509 | xbs, | |
2510 | NULL, | |
2511 | NULL, | |
2512 | &credits); | |
2513 | if (ret) { | |
2514 | mlog_errno(ret); | |
2515 | goto out; | |
2516 | } | |
2517 | ||
2518 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2519 | ctxt->handle->h_buffer_credits); | |
2520 | if (ret) { | |
2521 | mlog_errno(ret); | |
2522 | goto out; | |
2523 | } | |
2524 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2525 | xis, ctxt); | |
2526 | } | |
2527 | } | |
2528 | } | |
2529 | ||
2530 | out: | |
2531 | return ret; | |
2532 | } | |
2533 | ||
6c3faba4 TY |
2534 | /* |
2535 | * This function only called duing creating inode | |
2536 | * for init security/acl xattrs of the new inode. | |
2537 | * The xattrs could be put into ibody or extent block, | |
2538 | * xattr bucket would not be use in this case. | |
2539 | * transanction credits also be reserved in here. | |
2540 | */ | |
2541 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2542 | struct inode *inode, | |
2543 | struct buffer_head *di_bh, | |
2544 | int name_index, | |
2545 | const char *name, | |
2546 | const void *value, | |
2547 | size_t value_len, | |
2548 | int flags, | |
2549 | struct ocfs2_alloc_context *meta_ac, | |
2550 | struct ocfs2_alloc_context *data_ac) | |
2551 | { | |
2552 | struct ocfs2_dinode *di; | |
2553 | int ret; | |
2554 | ||
2555 | struct ocfs2_xattr_info xi = { | |
2556 | .name_index = name_index, | |
2557 | .name = name, | |
2558 | .value = value, | |
2559 | .value_len = value_len, | |
2560 | }; | |
2561 | ||
2562 | struct ocfs2_xattr_search xis = { | |
2563 | .not_found = -ENODATA, | |
2564 | }; | |
2565 | ||
2566 | struct ocfs2_xattr_search xbs = { | |
2567 | .not_found = -ENODATA, | |
2568 | }; | |
2569 | ||
2570 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2571 | .handle = handle, | |
2572 | .meta_ac = meta_ac, | |
2573 | .data_ac = data_ac, | |
2574 | }; | |
2575 | ||
2576 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2577 | return -EOPNOTSUPP; | |
2578 | ||
2579 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2580 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2581 | ||
2582 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2583 | ||
2584 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2585 | if (ret) | |
2586 | goto cleanup; | |
2587 | if (xis.not_found) { | |
2588 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2589 | if (ret) | |
2590 | goto cleanup; | |
2591 | } | |
2592 | ||
2593 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2594 | ||
2595 | cleanup: | |
2596 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2597 | brelse(xbs.xattr_bh); | |
2598 | ||
2599 | return ret; | |
2600 | } | |
2601 | ||
cf1d6c76 TY |
2602 | /* |
2603 | * ocfs2_xattr_set() | |
2604 | * | |
2605 | * Set, replace or remove an extended attribute for this inode. | |
2606 | * value is NULL to remove an existing extended attribute, else either | |
2607 | * create or replace an extended attribute. | |
2608 | */ | |
2609 | int ocfs2_xattr_set(struct inode *inode, | |
2610 | int name_index, | |
2611 | const char *name, | |
2612 | const void *value, | |
2613 | size_t value_len, | |
2614 | int flags) | |
2615 | { | |
2616 | struct buffer_head *di_bh = NULL; | |
2617 | struct ocfs2_dinode *di; | |
85db90e7 | 2618 | int ret, credits; |
78f30c31 | 2619 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2620 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2621 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
cf1d6c76 TY |
2622 | |
2623 | struct ocfs2_xattr_info xi = { | |
2624 | .name_index = name_index, | |
2625 | .name = name, | |
2626 | .value = value, | |
2627 | .value_len = value_len, | |
2628 | }; | |
2629 | ||
2630 | struct ocfs2_xattr_search xis = { | |
2631 | .not_found = -ENODATA, | |
2632 | }; | |
2633 | ||
2634 | struct ocfs2_xattr_search xbs = { | |
2635 | .not_found = -ENODATA, | |
2636 | }; | |
2637 | ||
8154da3d TY |
2638 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2639 | return -EOPNOTSUPP; | |
2640 | ||
ba937127 JB |
2641 | /* |
2642 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2643 | * bucket. | |
2644 | */ | |
2645 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2646 | if (!xbs.bucket) { | |
2647 | mlog_errno(-ENOMEM); | |
2648 | return -ENOMEM; | |
2649 | } | |
2650 | ||
cf1d6c76 TY |
2651 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2652 | if (ret < 0) { | |
2653 | mlog_errno(ret); | |
ba937127 | 2654 | goto cleanup_nolock; |
cf1d6c76 TY |
2655 | } |
2656 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2657 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2658 | ||
2659 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2660 | /* | |
2661 | * Scan inode and external block to find the same name | |
2662 | * extended attribute and collect search infomation. | |
2663 | */ | |
2664 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2665 | if (ret) | |
2666 | goto cleanup; | |
2667 | if (xis.not_found) { | |
2668 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2669 | if (ret) | |
2670 | goto cleanup; | |
2671 | } | |
2672 | ||
2673 | if (xis.not_found && xbs.not_found) { | |
2674 | ret = -ENODATA; | |
2675 | if (flags & XATTR_REPLACE) | |
2676 | goto cleanup; | |
2677 | ret = 0; | |
2678 | if (!value) | |
2679 | goto cleanup; | |
2680 | } else { | |
2681 | ret = -EEXIST; | |
2682 | if (flags & XATTR_CREATE) | |
2683 | goto cleanup; | |
2684 | } | |
2685 | ||
85db90e7 TM |
2686 | |
2687 | mutex_lock(&tl_inode->i_mutex); | |
2688 | ||
2689 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2690 | ret = __ocfs2_flush_truncate_log(osb); | |
2691 | if (ret < 0) { | |
2692 | mutex_unlock(&tl_inode->i_mutex); | |
2693 | mlog_errno(ret); | |
2694 | goto cleanup; | |
2695 | } | |
2696 | } | |
2697 | mutex_unlock(&tl_inode->i_mutex); | |
2698 | ||
2699 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
2700 | &xbs, &ctxt, &credits); | |
78f30c31 TM |
2701 | if (ret) { |
2702 | mlog_errno(ret); | |
2703 | goto cleanup; | |
2704 | } | |
2705 | ||
85db90e7 TM |
2706 | ctxt.handle = ocfs2_start_trans(osb, credits); |
2707 | if (IS_ERR(ctxt.handle)) { | |
2708 | ret = PTR_ERR(ctxt.handle); | |
2709 | mlog_errno(ret); | |
2710 | goto cleanup; | |
cf1d6c76 | 2711 | } |
85db90e7 TM |
2712 | |
2713 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2714 | ||
2715 | ocfs2_commit_trans(osb, ctxt.handle); | |
2716 | ||
78f30c31 TM |
2717 | if (ctxt.data_ac) |
2718 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2719 | if (ctxt.meta_ac) | |
2720 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2721 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2722 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2723 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2724 | cleanup: |
2725 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2726 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2727 | cleanup_nolock: |
cf1d6c76 TY |
2728 | brelse(di_bh); |
2729 | brelse(xbs.xattr_bh); | |
ba937127 | 2730 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2731 | |
2732 | return ret; | |
2733 | } | |
2734 | ||
0c044f0b TM |
2735 | /* |
2736 | * Find the xattr extent rec which may contains name_hash. | |
2737 | * e_cpos will be the first name hash of the xattr rec. | |
2738 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2739 | */ | |
2740 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2741 | u32 name_hash, | |
2742 | u64 *p_blkno, | |
2743 | u32 *e_cpos, | |
2744 | u32 *num_clusters, | |
2745 | struct ocfs2_extent_list *el) | |
2746 | { | |
2747 | int ret = 0, i; | |
2748 | struct buffer_head *eb_bh = NULL; | |
2749 | struct ocfs2_extent_block *eb; | |
2750 | struct ocfs2_extent_rec *rec = NULL; | |
2751 | u64 e_blkno = 0; | |
2752 | ||
2753 | if (el->l_tree_depth) { | |
2754 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2755 | if (ret) { | |
2756 | mlog_errno(ret); | |
2757 | goto out; | |
2758 | } | |
2759 | ||
2760 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2761 | el = &eb->h_list; | |
2762 | ||
2763 | if (el->l_tree_depth) { | |
2764 | ocfs2_error(inode->i_sb, | |
2765 | "Inode %lu has non zero tree depth in " | |
2766 | "xattr tree block %llu\n", inode->i_ino, | |
2767 | (unsigned long long)eb_bh->b_blocknr); | |
2768 | ret = -EROFS; | |
2769 | goto out; | |
2770 | } | |
2771 | } | |
2772 | ||
2773 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2774 | rec = &el->l_recs[i]; | |
2775 | ||
2776 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2777 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2778 | break; | |
2779 | } | |
2780 | } | |
2781 | ||
2782 | if (!e_blkno) { | |
2783 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2784 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2785 | le32_to_cpu(rec->e_cpos), | |
2786 | ocfs2_rec_clusters(el, rec)); | |
2787 | ret = -EROFS; | |
2788 | goto out; | |
2789 | } | |
2790 | ||
2791 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2792 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2793 | if (e_cpos) | |
2794 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2795 | out: | |
2796 | brelse(eb_bh); | |
2797 | return ret; | |
2798 | } | |
2799 | ||
2800 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2801 | struct ocfs2_xattr_bucket *bucket, | |
2802 | void *para); | |
2803 | ||
589dc260 | 2804 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2805 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2806 | int name_index, |
2807 | const char *name, | |
2808 | u32 name_hash, | |
2809 | u16 *xe_index, | |
2810 | int *found) | |
2811 | { | |
2812 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2813 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2814 | size_t name_len = strlen(name); |
2815 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2816 | char *xe_name; |
2817 | ||
2818 | /* | |
2819 | * We don't use binary search in the bucket because there | |
2820 | * may be multiple entries with the same name hash. | |
2821 | */ | |
2822 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2823 | xe = &xh->xh_entries[i]; | |
2824 | ||
2825 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2826 | continue; | |
2827 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2828 | break; | |
2829 | ||
2830 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2831 | if (!cmp) | |
2832 | cmp = name_len - xe->xe_name_len; | |
2833 | if (cmp) | |
2834 | continue; | |
2835 | ||
2836 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2837 | xh, | |
2838 | i, | |
2839 | &block_off, | |
2840 | &new_offset); | |
2841 | if (ret) { | |
2842 | mlog_errno(ret); | |
2843 | break; | |
2844 | } | |
2845 | ||
970e4936 | 2846 | |
e2356a3f JB |
2847 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2848 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2849 | *xe_index = i; |
2850 | *found = 1; | |
2851 | ret = 0; | |
2852 | break; | |
2853 | } | |
2854 | } | |
2855 | ||
2856 | return ret; | |
2857 | } | |
2858 | ||
2859 | /* | |
2860 | * Find the specified xattr entry in a series of buckets. | |
2861 | * This series start from p_blkno and last for num_clusters. | |
2862 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2863 | * the num of the valid buckets. | |
2864 | * | |
2865 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2866 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2867 | */ | |
2868 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2869 | int name_index, | |
2870 | const char *name, | |
2871 | u32 name_hash, | |
2872 | u64 p_blkno, | |
2873 | u32 first_hash, | |
2874 | u32 num_clusters, | |
2875 | struct ocfs2_xattr_search *xs) | |
2876 | { | |
2877 | int ret, found = 0; | |
589dc260 TM |
2878 | struct ocfs2_xattr_header *xh = NULL; |
2879 | struct ocfs2_xattr_entry *xe = NULL; | |
2880 | u16 index = 0; | |
2881 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2882 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2883 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2884 | u32 last_hash; |
e2356a3f | 2885 | u64 blkno, lower_blkno = 0; |
589dc260 | 2886 | |
e2356a3f JB |
2887 | search = ocfs2_xattr_bucket_new(inode); |
2888 | if (!search) { | |
2889 | ret = -ENOMEM; | |
2890 | mlog_errno(ret); | |
2891 | goto out; | |
2892 | } | |
2893 | ||
2894 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2895 | if (ret) { |
2896 | mlog_errno(ret); | |
2897 | goto out; | |
2898 | } | |
2899 | ||
e2356a3f | 2900 | xh = bucket_xh(search); |
589dc260 | 2901 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 2902 | while (low_bucket <= high_bucket) { |
e2356a3f | 2903 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 2904 | |
e2356a3f | 2905 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 2906 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 2907 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
2908 | if (ret) { |
2909 | mlog_errno(ret); | |
2910 | goto out; | |
2911 | } | |
2912 | ||
e2356a3f | 2913 | xh = bucket_xh(search); |
589dc260 TM |
2914 | xe = &xh->xh_entries[0]; |
2915 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
2916 | high_bucket = bucket - 1; | |
2917 | continue; | |
2918 | } | |
2919 | ||
2920 | /* | |
2921 | * Check whether the hash of the last entry in our | |
5a095611 TM |
2922 | * bucket is larger than the search one. for an empty |
2923 | * bucket, the last one is also the first one. | |
589dc260 | 2924 | */ |
5a095611 TM |
2925 | if (xh->xh_count) |
2926 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
2927 | ||
589dc260 TM |
2928 | last_hash = le32_to_cpu(xe->xe_name_hash); |
2929 | ||
e2356a3f JB |
2930 | /* record lower_blkno which may be the insert place. */ |
2931 | lower_blkno = blkno; | |
589dc260 TM |
2932 | |
2933 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
2934 | low_bucket = bucket + 1; | |
2935 | continue; | |
2936 | } | |
2937 | ||
2938 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 2939 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
2940 | name_index, name, name_hash, |
2941 | &index, &found); | |
2942 | if (ret) { | |
2943 | mlog_errno(ret); | |
2944 | goto out; | |
2945 | } | |
2946 | break; | |
2947 | } | |
2948 | ||
2949 | /* | |
2950 | * Record the bucket we have found. | |
2951 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
2952 | * always set it to the previous bucket. | |
2953 | */ | |
e2356a3f JB |
2954 | if (!lower_blkno) |
2955 | lower_blkno = p_blkno; | |
2956 | ||
2957 | /* This should be in cache - we just read it during the search */ | |
2958 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
2959 | if (ret) { | |
2960 | mlog_errno(ret); | |
2961 | goto out; | |
589dc260 | 2962 | } |
589dc260 | 2963 | |
ba937127 JB |
2964 | xs->header = bucket_xh(xs->bucket); |
2965 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
2966 | xs->end = xs->base + inode->i_sb->s_blocksize; |
2967 | ||
2968 | if (found) { | |
589dc260 TM |
2969 | xs->here = &xs->header->xh_entries[index]; |
2970 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 2971 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
2972 | } else |
2973 | ret = -ENODATA; | |
2974 | ||
2975 | out: | |
e2356a3f | 2976 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
2977 | return ret; |
2978 | } | |
2979 | ||
2980 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
2981 | struct buffer_head *root_bh, | |
2982 | int name_index, | |
2983 | const char *name, | |
2984 | struct ocfs2_xattr_search *xs) | |
2985 | { | |
2986 | int ret; | |
2987 | struct ocfs2_xattr_block *xb = | |
2988 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
2989 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
2990 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
2991 | u64 p_blkno = 0; | |
2992 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 2993 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
2994 | |
2995 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2996 | return -ENODATA; | |
2997 | ||
2998 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
2999 | name, name_hash, name_index); | |
3000 | ||
3001 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3002 | &num_clusters, el); | |
3003 | if (ret) { | |
3004 | mlog_errno(ret); | |
3005 | goto out; | |
3006 | } | |
3007 | ||
3008 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3009 | ||
3010 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3011 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3012 | first_hash); | |
589dc260 TM |
3013 | |
3014 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3015 | p_blkno, first_hash, num_clusters, xs); | |
3016 | ||
3017 | out: | |
3018 | return ret; | |
3019 | } | |
3020 | ||
0c044f0b TM |
3021 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3022 | u64 blkno, | |
3023 | u32 clusters, | |
3024 | xattr_bucket_func *func, | |
3025 | void *para) | |
3026 | { | |
6dde41d9 | 3027 | int i, ret = 0; |
0c044f0b TM |
3028 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3029 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3030 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3031 | |
ba937127 JB |
3032 | bucket = ocfs2_xattr_bucket_new(inode); |
3033 | if (!bucket) { | |
3034 | mlog_errno(-ENOMEM); | |
3035 | return -ENOMEM; | |
3036 | } | |
0c044f0b TM |
3037 | |
3038 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3039 | clusters, (unsigned long long)blkno); |
0c044f0b | 3040 | |
ba937127 JB |
3041 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3042 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3043 | if (ret) { |
3044 | mlog_errno(ret); | |
ba937127 | 3045 | break; |
0c044f0b TM |
3046 | } |
3047 | ||
0c044f0b TM |
3048 | /* |
3049 | * The real bucket num in this series of blocks is stored | |
3050 | * in the 1st bucket. | |
3051 | */ | |
3052 | if (i == 0) | |
ba937127 | 3053 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3054 | |
de29c085 MF |
3055 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3056 | (unsigned long long)blkno, | |
ba937127 | 3057 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3058 | if (func) { |
ba937127 JB |
3059 | ret = func(inode, bucket, para); |
3060 | if (ret) | |
0c044f0b | 3061 | mlog_errno(ret); |
ba937127 | 3062 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3063 | } |
3064 | ||
ba937127 JB |
3065 | ocfs2_xattr_bucket_relse(bucket); |
3066 | if (ret) | |
3067 | break; | |
0c044f0b TM |
3068 | } |
3069 | ||
ba937127 | 3070 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3071 | return ret; |
3072 | } | |
3073 | ||
3074 | struct ocfs2_xattr_tree_list { | |
3075 | char *buffer; | |
3076 | size_t buffer_size; | |
936b8834 | 3077 | size_t result; |
0c044f0b TM |
3078 | }; |
3079 | ||
3080 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
3081 | struct ocfs2_xattr_header *xh, | |
3082 | int index, | |
3083 | int *block_off, | |
3084 | int *new_offset) | |
3085 | { | |
3086 | u16 name_offset; | |
3087 | ||
3088 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3089 | return -EINVAL; | |
3090 | ||
3091 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3092 | ||
3093 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
3094 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
3095 | ||
3096 | return 0; | |
3097 | } | |
3098 | ||
3099 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3100 | struct ocfs2_xattr_bucket *bucket, | |
3101 | void *para) | |
3102 | { | |
936b8834 | 3103 | int ret = 0, type; |
0c044f0b | 3104 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3105 | int i, block_off, new_offset; |
936b8834 | 3106 | const char *prefix, *name; |
0c044f0b | 3107 | |
3e632946 JB |
3108 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3109 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3110 | type = ocfs2_xattr_get_type(entry); |
3111 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3112 | |
936b8834 | 3113 | if (prefix) { |
0c044f0b | 3114 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 3115 | bucket_xh(bucket), |
0c044f0b TM |
3116 | i, |
3117 | &block_off, | |
3118 | &new_offset); | |
3119 | if (ret) | |
3120 | break; | |
936b8834 | 3121 | |
51def39f | 3122 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3123 | new_offset; |
3124 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3125 | xl->buffer_size, | |
3126 | &xl->result, | |
3127 | prefix, name, | |
3128 | entry->xe_name_len); | |
3129 | if (ret) | |
3130 | break; | |
0c044f0b TM |
3131 | } |
3132 | } | |
3133 | ||
3134 | return ret; | |
3135 | } | |
3136 | ||
3137 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3138 | struct ocfs2_xattr_tree_root *xt, | |
3139 | char *buffer, | |
3140 | size_t buffer_size) | |
3141 | { | |
3142 | struct ocfs2_extent_list *el = &xt->xt_list; | |
3143 | int ret = 0; | |
3144 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3145 | u64 p_blkno = 0; | |
3146 | struct ocfs2_xattr_tree_list xl = { | |
3147 | .buffer = buffer, | |
3148 | .buffer_size = buffer_size, | |
936b8834 | 3149 | .result = 0, |
0c044f0b TM |
3150 | }; |
3151 | ||
3152 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3153 | return 0; | |
3154 | ||
3155 | while (name_hash > 0) { | |
3156 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3157 | &e_cpos, &num_clusters, el); | |
3158 | if (ret) { | |
3159 | mlog_errno(ret); | |
3160 | goto out; | |
3161 | } | |
3162 | ||
3163 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
3164 | ocfs2_list_xattr_bucket, | |
3165 | &xl); | |
3166 | if (ret) { | |
3167 | mlog_errno(ret); | |
3168 | goto out; | |
3169 | } | |
3170 | ||
3171 | if (e_cpos == 0) | |
3172 | break; | |
3173 | ||
3174 | name_hash = e_cpos - 1; | |
3175 | } | |
3176 | ||
936b8834 | 3177 | ret = xl.result; |
0c044f0b TM |
3178 | out: |
3179 | return ret; | |
3180 | } | |
01225596 TM |
3181 | |
3182 | static int cmp_xe(const void *a, const void *b) | |
3183 | { | |
3184 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3185 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3186 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3187 | ||
3188 | if (l_hash > r_hash) | |
3189 | return 1; | |
3190 | if (l_hash < r_hash) | |
3191 | return -1; | |
3192 | return 0; | |
3193 | } | |
3194 | ||
3195 | static void swap_xe(void *a, void *b, int size) | |
3196 | { | |
3197 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3198 | ||
3199 | tmp = *l; | |
3200 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3201 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3202 | } | |
3203 | ||
3204 | /* | |
3205 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3206 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3207 | * The header goes at the start of the bucket, and the names+values are |
3208 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3209 | * Note: we need to sort the entries since they are not saved in order |
3210 | * in the ocfs2_xattr_block. | |
3211 | */ | |
3212 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3213 | struct buffer_head *xb_bh, | |
178eeac3 | 3214 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3215 | { |
3216 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3217 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3218 | u16 offset, size, off_change; |
3219 | struct ocfs2_xattr_entry *xe; | |
3220 | struct ocfs2_xattr_block *xb = | |
3221 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3222 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3223 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3224 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3225 | char *src = xb_bh->b_data; |
3226 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3227 | |
3228 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3229 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3230 | (unsigned long long)bucket_blkno(bucket)); |
3231 | ||
3232 | for (i = 0; i < blks; i++) | |
3233 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3234 | |
01225596 TM |
3235 | /* |
3236 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3237 | * there is a offset change corresponding to the change of | |
3238 | * ocfs2_xattr_header's position. | |
3239 | */ | |
3240 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3241 | xe = &xb_xh->xh_entries[count - 1]; | |
3242 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3243 | size = blocksize - offset; | |
3244 | ||
3245 | /* copy all the names and values. */ | |
01225596 TM |
3246 | memcpy(target + offset, src + offset, size); |
3247 | ||
3248 | /* Init new header now. */ | |
3249 | xh->xh_count = xb_xh->xh_count; | |
3250 | xh->xh_num_buckets = cpu_to_le16(1); | |
3251 | xh->xh_name_value_len = cpu_to_le16(size); | |
3252 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3253 | ||
3254 | /* copy all the entries. */ | |
178eeac3 | 3255 | target = bucket_block(bucket, 0); |
01225596 TM |
3256 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3257 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3258 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3259 | ||
3260 | /* Change the xe offset for all the xe because of the move. */ | |
3261 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3262 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3263 | for (i = 0; i < count; i++) | |
3264 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3265 | ||
3266 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3267 | offset, size, off_change); | |
3268 | ||
3269 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3270 | cmp_xe, swap_xe); | |
3271 | } | |
3272 | ||
3273 | /* | |
3274 | * After we move xattr from block to index btree, we have to | |
3275 | * update ocfs2_xattr_search to the new xe and base. | |
3276 | * | |
3277 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3278 | * While if the entry is in index b-tree, "bucket" indicates the | |
3279 | * real place of the xattr. | |
3280 | */ | |
178eeac3 JB |
3281 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3282 | struct ocfs2_xattr_search *xs, | |
3283 | struct buffer_head *old_bh) | |
01225596 | 3284 | { |
01225596 TM |
3285 | char *buf = old_bh->b_data; |
3286 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3287 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3288 | int i; |
01225596 | 3289 | |
ba937127 | 3290 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3291 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3292 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3293 | ||
178eeac3 JB |
3294 | if (xs->not_found) |
3295 | return; | |
01225596 | 3296 | |
178eeac3 JB |
3297 | i = xs->here - old_xh->xh_entries; |
3298 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3299 | } |
3300 | ||
3301 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3302 | struct ocfs2_xattr_search *xs, |
3303 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3304 | { |
85db90e7 | 3305 | int ret; |
01225596 TM |
3306 | u32 bit_off, len; |
3307 | u64 blkno; | |
85db90e7 | 3308 | handle_t *handle = ctxt->handle; |
01225596 TM |
3309 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3310 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3311 | struct buffer_head *xb_bh = xs->xattr_bh; |
3312 | struct ocfs2_xattr_block *xb = | |
3313 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3314 | struct ocfs2_xattr_tree_root *xr; | |
3315 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3316 | |
3317 | mlog(0, "create xattr index block for %llu\n", | |
3318 | (unsigned long long)xb_bh->b_blocknr); | |
3319 | ||
3320 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3321 | BUG_ON(!xs->bucket); |
01225596 | 3322 | |
01225596 TM |
3323 | /* |
3324 | * XXX: | |
3325 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3326 | * if performance becomes a problem later. | |
3327 | */ | |
3328 | down_write(&oi->ip_alloc_sem); | |
3329 | ||
01225596 TM |
3330 | ret = ocfs2_journal_access(handle, inode, xb_bh, |
3331 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3332 | if (ret) { | |
3333 | mlog_errno(ret); | |
85db90e7 | 3334 | goto out; |
01225596 TM |
3335 | } |
3336 | ||
78f30c31 TM |
3337 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3338 | 1, 1, &bit_off, &len); | |
01225596 TM |
3339 | if (ret) { |
3340 | mlog_errno(ret); | |
85db90e7 | 3341 | goto out; |
01225596 TM |
3342 | } |
3343 | ||
3344 | /* | |
3345 | * The bucket may spread in many blocks, and | |
3346 | * we will only touch the 1st block and the last block | |
3347 | * in the whole bucket(one for entry and one for data). | |
3348 | */ | |
3349 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3350 | ||
de29c085 MF |
3351 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3352 | (unsigned long long)blkno); | |
01225596 | 3353 | |
178eeac3 JB |
3354 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3355 | if (ret) { | |
01225596 | 3356 | mlog_errno(ret); |
85db90e7 | 3357 | goto out; |
01225596 TM |
3358 | } |
3359 | ||
178eeac3 JB |
3360 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3361 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3362 | if (ret) { |
3363 | mlog_errno(ret); | |
85db90e7 | 3364 | goto out; |
01225596 TM |
3365 | } |
3366 | ||
178eeac3 JB |
3367 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3368 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3369 | |
178eeac3 | 3370 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3371 | |
3372 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3373 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3374 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3375 | ||
3376 | xr = &xb->xb_attrs.xb_root; | |
3377 | xr->xt_clusters = cpu_to_le32(1); | |
3378 | xr->xt_last_eb_blk = 0; | |
3379 | xr->xt_list.l_tree_depth = 0; | |
3380 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3381 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3382 | ||
3383 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3384 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3385 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3386 | ||
3387 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3388 | ||
85db90e7 | 3389 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3390 | |
85db90e7 | 3391 | out: |
01225596 TM |
3392 | up_write(&oi->ip_alloc_sem); |
3393 | ||
01225596 TM |
3394 | return ret; |
3395 | } | |
3396 | ||
3397 | static int cmp_xe_offset(const void *a, const void *b) | |
3398 | { | |
3399 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3400 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3401 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3402 | ||
3403 | if (l_name_offset < r_name_offset) | |
3404 | return 1; | |
3405 | if (l_name_offset > r_name_offset) | |
3406 | return -1; | |
3407 | return 0; | |
3408 | } | |
3409 | ||
3410 | /* | |
3411 | * defrag a xattr bucket if we find that the bucket has some | |
3412 | * holes beteen name/value pairs. | |
3413 | * We will move all the name/value pairs to the end of the bucket | |
3414 | * so that we can spare some space for insertion. | |
3415 | */ | |
3416 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3417 | handle_t *handle, |
01225596 TM |
3418 | struct ocfs2_xattr_bucket *bucket) |
3419 | { | |
3420 | int ret, i; | |
3421 | size_t end, offset, len, value_len; | |
3422 | struct ocfs2_xattr_header *xh; | |
3423 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3424 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3425 | u16 xh_free_start; |
01225596 | 3426 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3427 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3428 | |
3429 | /* | |
3430 | * In order to make the operation more efficient and generic, | |
3431 | * we copy all the blocks into a contiguous memory and do the | |
3432 | * defragment there, so if anything is error, we will not touch | |
3433 | * the real block. | |
3434 | */ | |
3435 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3436 | if (!bucket_buf) { | |
3437 | ret = -EIO; | |
3438 | goto out; | |
3439 | } | |
3440 | ||
3441 | buf = bucket_buf; | |
1c32a2fd TM |
3442 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3443 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3444 | |
1c32a2fd | 3445 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3446 | OCFS2_JOURNAL_ACCESS_WRITE); |
3447 | if (ret < 0) { | |
3448 | mlog_errno(ret); | |
85db90e7 | 3449 | goto out; |
01225596 TM |
3450 | } |
3451 | ||
3452 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3453 | entries = (char *)xh->xh_entries; | |
3454 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3455 | ||
3456 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3457 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3458 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3459 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3460 | |
3461 | /* | |
3462 | * sort all the entries by their offset. | |
3463 | * the largest will be the first, so that we can | |
3464 | * move them to the end one by one. | |
3465 | */ | |
3466 | sort(entries, le16_to_cpu(xh->xh_count), | |
3467 | sizeof(struct ocfs2_xattr_entry), | |
3468 | cmp_xe_offset, swap_xe); | |
3469 | ||
3470 | /* Move all name/values to the end of the bucket. */ | |
3471 | xe = xh->xh_entries; | |
3472 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3473 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3474 | offset = le16_to_cpu(xe->xe_name_offset); | |
3475 | if (ocfs2_xattr_is_local(xe)) | |
3476 | value_len = OCFS2_XATTR_SIZE( | |
3477 | le64_to_cpu(xe->xe_value_size)); | |
3478 | else | |
3479 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3480 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3481 | ||
3482 | /* | |
3483 | * We must make sure that the name/value pair | |
3484 | * exist in the same block. So adjust end to | |
3485 | * the previous block end if needed. | |
3486 | */ | |
3487 | if (((end - len) / blocksize != | |
3488 | (end - 1) / blocksize)) | |
3489 | end = end - end % blocksize; | |
3490 | ||
3491 | if (end > offset + len) { | |
3492 | memmove(bucket_buf + end - len, | |
3493 | bucket_buf + offset, len); | |
3494 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3495 | } | |
3496 | ||
3497 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3498 | "bucket %llu\n", (unsigned long long)blkno); | |
3499 | ||
3500 | end -= len; | |
3501 | } | |
3502 | ||
3503 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3504 | "bucket %llu\n", (unsigned long long)blkno); | |
3505 | ||
3506 | if (xh_free_start == end) | |
85db90e7 | 3507 | goto out; |
01225596 TM |
3508 | |
3509 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3510 | xh->xh_free_start = cpu_to_le16(end); | |
3511 | ||
3512 | /* sort the entries by their name_hash. */ | |
3513 | sort(entries, le16_to_cpu(xh->xh_count), | |
3514 | sizeof(struct ocfs2_xattr_entry), | |
3515 | cmp_xe, swap_xe); | |
3516 | ||
3517 | buf = bucket_buf; | |
1c32a2fd TM |
3518 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3519 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3520 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3521 | |
01225596 | 3522 | out: |
01225596 TM |
3523 | kfree(bucket_buf); |
3524 | return ret; | |
3525 | } | |
3526 | ||
3527 | /* | |
3528 | * Move half nums of the xattr bucket in the previous cluster to this new | |
3529 | * cluster. We only touch the last cluster of the previous extend record. | |
3530 | * | |
3531 | * first_bh is the first buffer_head of a series of bucket in the same | |
3532 | * extent rec and header_bh is the header of one bucket in this cluster. | |
3533 | * They will be updated if we move the data header_bh contains to the new | |
3534 | * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. | |
3535 | */ | |
3536 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3537 | handle_t *handle, | |
3538 | struct buffer_head **first_bh, | |
3539 | struct buffer_head **header_bh, | |
3540 | u64 new_blkno, | |
3541 | u64 prev_blkno, | |
3542 | u32 num_clusters, | |
3543 | u32 *first_hash) | |
3544 | { | |
3545 | int i, ret, credits; | |
3546 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3547 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3548 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3549 | int blocksize = inode->i_sb->s_blocksize; | |
3550 | struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; | |
3551 | struct ocfs2_xattr_header *new_xh; | |
3552 | struct ocfs2_xattr_header *xh = | |
3553 | (struct ocfs2_xattr_header *)((*first_bh)->b_data); | |
3554 | ||
3555 | BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); | |
3556 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); | |
3557 | ||
3558 | prev_bh = *first_bh; | |
3559 | get_bh(prev_bh); | |
3560 | xh = (struct ocfs2_xattr_header *)prev_bh->b_data; | |
3561 | ||
3562 | prev_blkno += (num_clusters - 1) * bpc + bpc / 2; | |
3563 | ||
3564 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", | |
de29c085 | 3565 | (unsigned long long)prev_blkno, (unsigned long long)new_blkno); |
01225596 TM |
3566 | |
3567 | /* | |
3568 | * We need to update the 1st half of the new cluster and | |
3569 | * 1 more for the update of the 1st bucket of the previous | |
3570 | * extent record. | |
3571 | */ | |
85db90e7 | 3572 | credits = bpc / 2 + 1 + handle->h_buffer_credits; |
01225596 TM |
3573 | ret = ocfs2_extend_trans(handle, credits); |
3574 | if (ret) { | |
3575 | mlog_errno(ret); | |
3576 | goto out; | |
3577 | } | |
3578 | ||
3579 | ret = ocfs2_journal_access(handle, inode, prev_bh, | |
3580 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3581 | if (ret) { | |
3582 | mlog_errno(ret); | |
3583 | goto out; | |
3584 | } | |
3585 | ||
3586 | for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { | |
3587 | old_bh = new_bh = NULL; | |
3588 | new_bh = sb_getblk(inode->i_sb, new_blkno); | |
3589 | if (!new_bh) { | |
3590 | ret = -EIO; | |
3591 | mlog_errno(ret); | |
3592 | goto out; | |
3593 | } | |
3594 | ||
3595 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
3596 | ||
3597 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
3598 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3599 | if (ret < 0) { | |
3600 | mlog_errno(ret); | |
3601 | brelse(new_bh); | |
3602 | goto out; | |
3603 | } | |
3604 | ||
970e4936 | 3605 | ret = ocfs2_read_block(inode, prev_blkno, &old_bh, NULL); |
01225596 TM |
3606 | if (ret < 0) { |
3607 | mlog_errno(ret); | |
3608 | brelse(new_bh); | |
3609 | goto out; | |
3610 | } | |
3611 | ||
3612 | memcpy(new_bh->b_data, old_bh->b_data, blocksize); | |
3613 | ||
3614 | if (i == 0) { | |
3615 | new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; | |
3616 | new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); | |
3617 | ||
3618 | if (first_hash) | |
3619 | *first_hash = le32_to_cpu( | |
3620 | new_xh->xh_entries[0].xe_name_hash); | |
3621 | new_first_bh = new_bh; | |
3622 | get_bh(new_first_bh); | |
3623 | } | |
3624 | ||
3625 | ocfs2_journal_dirty(handle, new_bh); | |
3626 | ||
3627 | if (*header_bh == old_bh) { | |
3628 | brelse(*header_bh); | |
3629 | *header_bh = new_bh; | |
3630 | get_bh(*header_bh); | |
3631 | ||
3632 | brelse(*first_bh); | |
3633 | *first_bh = new_first_bh; | |
3634 | get_bh(*first_bh); | |
3635 | } | |
3636 | brelse(new_bh); | |
3637 | brelse(old_bh); | |
3638 | } | |
3639 | ||
3640 | le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); | |
3641 | ||
3642 | ocfs2_journal_dirty(handle, prev_bh); | |
3643 | out: | |
3644 | brelse(prev_bh); | |
3645 | brelse(new_first_bh); | |
3646 | return ret; | |
3647 | } | |
3648 | ||
01225596 | 3649 | /* |
80bcaf34 TM |
3650 | * Find the suitable pos when we divide a bucket into 2. |
3651 | * We have to make sure the xattrs with the same hash value exist | |
3652 | * in the same bucket. | |
3653 | * | |
3654 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3655 | * place where the hash value changes. Try to find the most even split. | |
3656 | * The most common case is that all entries have different hash values, | |
3657 | * and the first check we make will find a place to split. | |
3658 | */ | |
3659 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3660 | { | |
3661 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3662 | int count = le16_to_cpu(xh->xh_count); | |
3663 | int delta, middle = count / 2; | |
3664 | ||
3665 | /* | |
3666 | * We start at the middle. Each step gets farther away in both | |
3667 | * directions. We therefore hit the change in hash value | |
3668 | * nearest to the middle. Note that this loop does not execute for | |
3669 | * count < 2. | |
3670 | */ | |
3671 | for (delta = 0; delta < middle; delta++) { | |
3672 | /* Let's check delta earlier than middle */ | |
3673 | if (cmp_xe(&entries[middle - delta - 1], | |
3674 | &entries[middle - delta])) | |
3675 | return middle - delta; | |
3676 | ||
3677 | /* For even counts, don't walk off the end */ | |
3678 | if ((middle + delta + 1) == count) | |
3679 | continue; | |
3680 | ||
3681 | /* Now try delta past middle */ | |
3682 | if (cmp_xe(&entries[middle + delta], | |
3683 | &entries[middle + delta + 1])) | |
3684 | return middle + delta + 1; | |
3685 | } | |
3686 | ||
3687 | /* Every entry had the same hash */ | |
3688 | return count; | |
3689 | } | |
3690 | ||
3691 | /* | |
3692 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3693 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3694 | * |
3695 | * Normally half of the xattrs will be moved. But we have to make | |
3696 | * sure that the xattrs with the same hash value are stored in the | |
3697 | * same bucket. If all the xattrs in this bucket have the same hash | |
3698 | * value, the new bucket will be initialized as an empty one and the | |
3699 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3700 | */ |
80bcaf34 TM |
3701 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3702 | handle_t *handle, | |
3703 | u64 blk, | |
3704 | u64 new_blk, | |
3705 | u32 *first_hash, | |
3706 | int new_bucket_head) | |
01225596 TM |
3707 | { |
3708 | int ret, i; | |
80bcaf34 | 3709 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3710 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3711 | struct ocfs2_xattr_header *xh; |
3712 | struct ocfs2_xattr_entry *xe; | |
3713 | int blocksize = inode->i_sb->s_blocksize; | |
3714 | ||
80bcaf34 | 3715 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3716 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3717 | |
ba937127 JB |
3718 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3719 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3720 | if (!s_bucket || !t_bucket) { | |
3721 | ret = -ENOMEM; | |
3722 | mlog_errno(ret); | |
3723 | goto out; | |
3724 | } | |
01225596 | 3725 | |
ba937127 | 3726 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3727 | if (ret) { |
3728 | mlog_errno(ret); | |
3729 | goto out; | |
3730 | } | |
3731 | ||
ba937127 | 3732 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3733 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3734 | if (ret) { |
3735 | mlog_errno(ret); | |
3736 | goto out; | |
3737 | } | |
3738 | ||
784b816a JB |
3739 | /* |
3740 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3741 | * there's no need to read it. | |
3742 | */ | |
ba937127 | 3743 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3744 | if (ret) { |
3745 | mlog_errno(ret); | |
3746 | goto out; | |
3747 | } | |
3748 | ||
ba937127 | 3749 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3750 | new_bucket_head ? |
3751 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3752 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3753 | if (ret) { | |
3754 | mlog_errno(ret); | |
3755 | goto out; | |
01225596 TM |
3756 | } |
3757 | ||
ba937127 | 3758 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3759 | count = le16_to_cpu(xh->xh_count); |
3760 | start = ocfs2_xattr_find_divide_pos(xh); | |
3761 | ||
3762 | if (start == count) { | |
3763 | xe = &xh->xh_entries[start-1]; | |
3764 | ||
3765 | /* | |
3766 | * initialized a new empty bucket here. | |
3767 | * The hash value is set as one larger than | |
3768 | * that of the last entry in the previous bucket. | |
3769 | */ | |
ba937127 JB |
3770 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3771 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3772 | |
ba937127 | 3773 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3774 | xh->xh_free_start = cpu_to_le16(blocksize); |
3775 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3776 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3777 | ||
3778 | goto set_num_buckets; | |
3779 | } | |
3780 | ||
01225596 | 3781 | /* copy the whole bucket to the new first. */ |
ba937127 | 3782 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3783 | |
3784 | /* update the new bucket. */ | |
ba937127 | 3785 | xh = bucket_xh(t_bucket); |
01225596 TM |
3786 | |
3787 | /* | |
3788 | * Calculate the total name/value len and xh_free_start for | |
3789 | * the old bucket first. | |
3790 | */ | |
3791 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3792 | name_value_len = 0; | |
3793 | for (i = 0; i < start; i++) { | |
3794 | xe = &xh->xh_entries[i]; | |
3795 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3796 | if (ocfs2_xattr_is_local(xe)) | |
3797 | xe_len += | |
3798 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3799 | else | |
3800 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3801 | name_value_len += xe_len; | |
3802 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3803 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3804 | } | |
3805 | ||
3806 | /* | |
3807 | * Now begin the modification to the new bucket. | |
3808 | * | |
3809 | * In the new bucket, We just move the xattr entry to the beginning | |
3810 | * and don't touch the name/value. So there will be some holes in the | |
3811 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3812 | * called. | |
3813 | */ | |
3814 | xe = &xh->xh_entries[start]; | |
3815 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3816 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3817 | (int)((char *)xe - (char *)xh), |
3818 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3819 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3820 | xe = &xh->xh_entries[count - start]; | |
3821 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3822 | memset((char *)xe, 0, len); | |
3823 | ||
3824 | le16_add_cpu(&xh->xh_count, -start); | |
3825 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3826 | ||
3827 | /* Calculate xh_free_start for the new bucket. */ | |
3828 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3829 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3830 | xe = &xh->xh_entries[i]; | |
3831 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3832 | if (ocfs2_xattr_is_local(xe)) | |
3833 | xe_len += | |
3834 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3835 | else | |
3836 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3837 | if (le16_to_cpu(xe->xe_name_offset) < | |
3838 | le16_to_cpu(xh->xh_free_start)) | |
3839 | xh->xh_free_start = xe->xe_name_offset; | |
3840 | } | |
3841 | ||
80bcaf34 | 3842 | set_num_buckets: |
01225596 TM |
3843 | /* set xh->xh_num_buckets for the new xh. */ |
3844 | if (new_bucket_head) | |
3845 | xh->xh_num_buckets = cpu_to_le16(1); | |
3846 | else | |
3847 | xh->xh_num_buckets = 0; | |
3848 | ||
ba937127 | 3849 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3850 | |
3851 | /* store the first_hash of the new bucket. */ | |
3852 | if (first_hash) | |
3853 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3854 | ||
3855 | /* | |
80bcaf34 TM |
3856 | * Now only update the 1st block of the old bucket. If we |
3857 | * just added a new empty bucket, there is no need to modify | |
3858 | * it. | |
01225596 | 3859 | */ |
80bcaf34 TM |
3860 | if (start == count) |
3861 | goto out; | |
3862 | ||
ba937127 | 3863 | xh = bucket_xh(s_bucket); |
01225596 TM |
3864 | memset(&xh->xh_entries[start], 0, |
3865 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3866 | xh->xh_count = cpu_to_le16(start); | |
3867 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3868 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3869 | ||
ba937127 | 3870 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3871 | |
3872 | out: | |
ba937127 JB |
3873 | ocfs2_xattr_bucket_free(s_bucket); |
3874 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3875 | |
3876 | return ret; | |
3877 | } | |
3878 | ||
3879 | /* | |
3880 | * Copy xattr from one bucket to another bucket. | |
3881 | * | |
3882 | * The caller must make sure that the journal transaction | |
3883 | * has enough space for journaling. | |
3884 | */ | |
3885 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3886 | handle_t *handle, | |
3887 | u64 s_blkno, | |
3888 | u64 t_blkno, | |
3889 | int t_is_new) | |
3890 | { | |
4980c6da | 3891 | int ret; |
ba937127 | 3892 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3893 | |
3894 | BUG_ON(s_blkno == t_blkno); | |
3895 | ||
3896 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3897 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3898 | t_is_new); | |
01225596 | 3899 | |
ba937127 JB |
3900 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3901 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3902 | if (!s_bucket || !t_bucket) { | |
3903 | ret = -ENOMEM; | |
3904 | mlog_errno(ret); | |
3905 | goto out; | |
3906 | } | |
3907 | ||
3908 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); | |
01225596 TM |
3909 | if (ret) |
3910 | goto out; | |
3911 | ||
784b816a JB |
3912 | /* |
3913 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3914 | * there's no need to read it. | |
3915 | */ | |
ba937127 | 3916 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3917 | if (ret) |
3918 | goto out; | |
3919 | ||
ba937127 | 3920 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3921 | t_is_new ? |
3922 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3923 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3924 | if (ret) | |
3925 | goto out; | |
01225596 | 3926 | |
ba937127 JB |
3927 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
3928 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
3929 | |
3930 | out: | |
ba937127 JB |
3931 | ocfs2_xattr_bucket_free(t_bucket); |
3932 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
3933 | |
3934 | return ret; | |
3935 | } | |
3936 | ||
3937 | /* | |
3938 | * Copy one xattr cluster from src_blk to to_blk. | |
3939 | * The to_blk will become the first bucket header of the cluster, so its | |
3940 | * xh_num_buckets will be initialized as the bucket num in the cluster. | |
3941 | */ | |
3942 | static int ocfs2_cp_xattr_cluster(struct inode *inode, | |
3943 | handle_t *handle, | |
3944 | struct buffer_head *first_bh, | |
3945 | u64 src_blk, | |
3946 | u64 to_blk, | |
3947 | u32 *first_hash) | |
3948 | { | |
3949 | int i, ret, credits; | |
3950 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3951 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3952 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3953 | struct buffer_head *bh = NULL; | |
3954 | struct ocfs2_xattr_header *xh; | |
3955 | u64 to_blk_start = to_blk; | |
3956 | ||
de29c085 MF |
3957 | mlog(0, "cp xattrs from cluster %llu to %llu\n", |
3958 | (unsigned long long)src_blk, (unsigned long long)to_blk); | |
01225596 TM |
3959 | |
3960 | /* | |
3961 | * We need to update the new cluster and 1 more for the update of | |
3962 | * the 1st bucket of the previous extent rec. | |
3963 | */ | |
85db90e7 | 3964 | credits = bpc + 1 + handle->h_buffer_credits; |
01225596 TM |
3965 | ret = ocfs2_extend_trans(handle, credits); |
3966 | if (ret) { | |
3967 | mlog_errno(ret); | |
3968 | goto out; | |
3969 | } | |
3970 | ||
3971 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3972 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3973 | if (ret) { | |
3974 | mlog_errno(ret); | |
3975 | goto out; | |
3976 | } | |
3977 | ||
3978 | for (i = 0; i < num_buckets; i++) { | |
3979 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
3980 | src_blk, to_blk, 1); | |
3981 | if (ret) { | |
3982 | mlog_errno(ret); | |
3983 | goto out; | |
3984 | } | |
3985 | ||
3986 | src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3987 | to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3988 | } | |
3989 | ||
3990 | /* update the old bucket header. */ | |
3991 | xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3992 | le16_add_cpu(&xh->xh_num_buckets, -num_buckets); | |
3993 | ||
3994 | ocfs2_journal_dirty(handle, first_bh); | |
3995 | ||
3996 | /* update the new bucket header. */ | |
970e4936 | 3997 | ret = ocfs2_read_block(inode, to_blk_start, &bh, NULL); |
01225596 TM |
3998 | if (ret < 0) { |
3999 | mlog_errno(ret); | |
4000 | goto out; | |
4001 | } | |
4002 | ||
4003 | ret = ocfs2_journal_access(handle, inode, bh, | |
4004 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4005 | if (ret) { | |
4006 | mlog_errno(ret); | |
4007 | goto out; | |
4008 | } | |
4009 | ||
4010 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
4011 | xh->xh_num_buckets = cpu_to_le16(num_buckets); | |
4012 | ||
4013 | ocfs2_journal_dirty(handle, bh); | |
4014 | ||
4015 | if (first_hash) | |
4016 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4017 | out: | |
4018 | brelse(bh); | |
4019 | return ret; | |
4020 | } | |
4021 | ||
4022 | /* | |
80bcaf34 | 4023 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4024 | * This function should only be called when bucket size == cluster size. |
4025 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4026 | */ | |
80bcaf34 TM |
4027 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4028 | handle_t *handle, | |
4029 | u64 prev_blk, | |
4030 | u64 new_blk, | |
4031 | u32 *first_hash) | |
01225596 TM |
4032 | { |
4033 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4034 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4035 | |
4036 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4037 | ||
4038 | ret = ocfs2_extend_trans(handle, credits); | |
4039 | if (ret) { | |
4040 | mlog_errno(ret); | |
4041 | return ret; | |
4042 | } | |
4043 | ||
4044 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4045 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4046 | new_blk, first_hash, 1); | |
01225596 TM |
4047 | } |
4048 | ||
4049 | /* | |
4050 | * Move some xattrs from the old cluster to the new one since they are not | |
4051 | * contiguous in ocfs2 xattr tree. | |
4052 | * | |
4053 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4054 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4055 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4056 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4057 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4058 | * to extend the insert bucket. | |
4059 | * | |
4060 | * The problem is how much xattr should we move to the new one and when should | |
4061 | * we update first_bh and header_bh? | |
4062 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4063 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4064 | * update the first_bh and header_bh if the insert bucket has been moved | |
4065 | * to the new cluster. | |
4066 | * 2. If cluster_size == bucket_size: | |
4067 | * a) If the previous extent rec has more than one cluster and the insert | |
4068 | * place isn't in the last cluster, copy the entire last cluster to the | |
4069 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4070 | * since they will not be moved into the new cluster. | |
4071 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4072 | * the new one. And we set the extend flag to zero if the insert place is | |
4073 | * moved into the new allocated cluster since no extend is needed. | |
4074 | */ | |
4075 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4076 | handle_t *handle, | |
4077 | struct buffer_head **first_bh, | |
4078 | struct buffer_head **header_bh, | |
4079 | u64 new_blk, | |
4080 | u64 prev_blk, | |
4081 | u32 prev_clusters, | |
4082 | u32 *v_start, | |
4083 | int *extend) | |
4084 | { | |
4085 | int ret = 0; | |
4086 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
4087 | ||
4088 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
de29c085 MF |
4089 | (unsigned long long)prev_blk, prev_clusters, |
4090 | (unsigned long long)new_blk); | |
01225596 TM |
4091 | |
4092 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) | |
4093 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, | |
4094 | handle, | |
4095 | first_bh, | |
4096 | header_bh, | |
4097 | new_blk, | |
4098 | prev_blk, | |
4099 | prev_clusters, | |
4100 | v_start); | |
4101 | else { | |
4102 | u64 last_blk = prev_blk + bpc * (prev_clusters - 1); | |
4103 | ||
4104 | if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) | |
4105 | ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, | |
4106 | last_blk, new_blk, | |
4107 | v_start); | |
4108 | else { | |
80bcaf34 TM |
4109 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4110 | last_blk, new_blk, | |
4111 | v_start); | |
01225596 TM |
4112 | |
4113 | if ((*header_bh)->b_blocknr == last_blk && extend) | |
4114 | *extend = 0; | |
4115 | } | |
4116 | } | |
4117 | ||
4118 | return ret; | |
4119 | } | |
4120 | ||
4121 | /* | |
4122 | * Add a new cluster for xattr storage. | |
4123 | * | |
4124 | * If the new cluster is contiguous with the previous one, it will be | |
4125 | * appended to the same extent record, and num_clusters will be updated. | |
4126 | * If not, we will insert a new extent for it and move some xattrs in | |
4127 | * the last cluster into the new allocated one. | |
4128 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4129 | * lose the benefits of hashing because we'll have to search large leaves. | |
4130 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4131 | * if it's bigger). | |
4132 | * | |
4133 | * first_bh is the first block of the previous extent rec and header_bh | |
4134 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4135 | * when the header_bh is moved into the new cluster. | |
4136 | */ | |
4137 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4138 | struct buffer_head *root_bh, | |
4139 | struct buffer_head **first_bh, | |
4140 | struct buffer_head **header_bh, | |
4141 | u32 *num_clusters, | |
4142 | u32 prev_cpos, | |
4143 | u64 prev_blkno, | |
78f30c31 TM |
4144 | int *extend, |
4145 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4146 | { |
85db90e7 | 4147 | int ret; |
01225596 TM |
4148 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4149 | u32 prev_clusters = *num_clusters; | |
4150 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4151 | u64 block; | |
85db90e7 | 4152 | handle_t *handle = ctxt->handle; |
01225596 | 4153 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4154 | struct ocfs2_extent_tree et; |
01225596 TM |
4155 | |
4156 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4157 | "previous xattr blkno = %llu\n", | |
4158 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
de29c085 | 4159 | prev_cpos, (unsigned long long)prev_blkno); |
01225596 | 4160 | |
8d6220d6 | 4161 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c | 4162 | |
01225596 TM |
4163 | ret = ocfs2_journal_access(handle, inode, root_bh, |
4164 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4165 | if (ret < 0) { | |
4166 | mlog_errno(ret); | |
4167 | goto leave; | |
4168 | } | |
4169 | ||
78f30c31 | 4170 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4171 | clusters_to_add, &bit_off, &num_bits); |
4172 | if (ret < 0) { | |
4173 | if (ret != -ENOSPC) | |
4174 | mlog_errno(ret); | |
4175 | goto leave; | |
4176 | } | |
4177 | ||
4178 | BUG_ON(num_bits > clusters_to_add); | |
4179 | ||
4180 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4181 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4182 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4183 | ||
4184 | if (prev_blkno + prev_clusters * bpc == block && | |
4185 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= | |
4186 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4187 | /* | |
4188 | * If this cluster is contiguous with the old one and | |
4189 | * adding this new cluster, we don't surpass the limit of | |
4190 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4191 | * initialized and used like other buckets in the previous | |
4192 | * cluster. | |
4193 | * So add it as a contiguous one. The caller will handle | |
4194 | * its init process. | |
4195 | */ | |
4196 | v_start = prev_cpos + prev_clusters; | |
4197 | *num_clusters = prev_clusters + num_bits; | |
4198 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4199 | num_bits); | |
4200 | } else { | |
4201 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4202 | handle, | |
4203 | first_bh, | |
4204 | header_bh, | |
4205 | block, | |
4206 | prev_blkno, | |
4207 | prev_clusters, | |
4208 | &v_start, | |
4209 | extend); | |
4210 | if (ret) { | |
4211 | mlog_errno(ret); | |
4212 | goto leave; | |
4213 | } | |
4214 | } | |
4215 | ||
4216 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4217 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c | 4218 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
78f30c31 | 4219 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4220 | if (ret < 0) { |
4221 | mlog_errno(ret); | |
4222 | goto leave; | |
4223 | } | |
4224 | ||
4225 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4226 | if (ret < 0) |
01225596 | 4227 | mlog_errno(ret); |
01225596 TM |
4228 | |
4229 | leave: | |
01225596 TM |
4230 | return ret; |
4231 | } | |
4232 | ||
4233 | /* | |
4234 | * Extend a new xattr bucket and move xattrs to the end one by one until | |
4235 | * We meet with start_bh. Only move half of the xattrs to the bucket after it. | |
4236 | */ | |
4237 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4238 | handle_t *handle, |
01225596 TM |
4239 | struct buffer_head *first_bh, |
4240 | struct buffer_head *start_bh, | |
4241 | u32 num_clusters) | |
4242 | { | |
4243 | int ret, credits; | |
4244 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4245 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4246 | u64 start_blk = start_bh->b_blocknr, end_blk; | |
4247 | u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); | |
01225596 TM |
4248 | struct ocfs2_xattr_header *first_xh = |
4249 | (struct ocfs2_xattr_header *)first_bh->b_data; | |
4250 | u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); | |
4251 | ||
4252 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
de29c085 | 4253 | "from %llu, len = %u\n", (unsigned long long)start_blk, |
01225596 TM |
4254 | (unsigned long long)first_bh->b_blocknr, num_clusters); |
4255 | ||
4256 | BUG_ON(bucket >= num_buckets); | |
4257 | ||
4258 | end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; | |
4259 | ||
4260 | /* | |
4261 | * We will touch all the buckets after the start_bh(include it). | |
1224be02 | 4262 | * Then we add one more bucket. |
01225596 | 4263 | */ |
85db90e7 TM |
4264 | credits = end_blk - start_blk + 3 * blk_per_bucket + 1 + |
4265 | handle->h_buffer_credits; | |
4266 | ret = ocfs2_extend_trans(handle, credits); | |
4267 | if (ret) { | |
01225596 TM |
4268 | mlog_errno(ret); |
4269 | goto out; | |
4270 | } | |
4271 | ||
4272 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
4273 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4274 | if (ret) { | |
4275 | mlog_errno(ret); | |
85db90e7 | 4276 | goto out; |
01225596 TM |
4277 | } |
4278 | ||
4279 | while (end_blk != start_blk) { | |
4280 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, | |
4281 | end_blk + blk_per_bucket, 0); | |
4282 | if (ret) | |
85db90e7 | 4283 | goto out; |
01225596 TM |
4284 | end_blk -= blk_per_bucket; |
4285 | } | |
4286 | ||
4287 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4288 | ret = ocfs2_divide_xattr_bucket(inode, handle, start_blk, |
4289 | start_blk + blk_per_bucket, NULL, 0); | |
01225596 TM |
4290 | |
4291 | le16_add_cpu(&first_xh->xh_num_buckets, 1); | |
4292 | ocfs2_journal_dirty(handle, first_bh); | |
4293 | ||
01225596 TM |
4294 | out: |
4295 | return ret; | |
4296 | } | |
4297 | ||
4298 | /* | |
4299 | * Add new xattr bucket in an extent record and adjust the buckets accordingly. | |
4300 | * xb_bh is the ocfs2_xattr_block. | |
4301 | * We will move all the buckets starting from header_bh to the next place. As | |
4302 | * for this one, half num of its xattrs will be moved to the next one. | |
4303 | * | |
4304 | * We will allocate a new cluster if current cluster is full and adjust | |
4305 | * header_bh and first_bh if the insert place is moved to the new cluster. | |
4306 | */ | |
4307 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4308 | struct buffer_head *xb_bh, | |
78f30c31 TM |
4309 | struct buffer_head *header_bh, |
4310 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4311 | { |
4312 | struct ocfs2_xattr_header *first_xh = NULL; | |
4313 | struct buffer_head *first_bh = NULL; | |
4314 | struct ocfs2_xattr_block *xb = | |
4315 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4316 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4317 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
4318 | struct ocfs2_xattr_header *xh = | |
4319 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4320 | u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4321 | struct super_block *sb = inode->i_sb; | |
4322 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
4323 | int ret, num_buckets, extend = 1; | |
4324 | u64 p_blkno; | |
4325 | u32 e_cpos, num_clusters; | |
4326 | ||
4327 | mlog(0, "Add new xattr bucket starting form %llu\n", | |
4328 | (unsigned long long)header_bh->b_blocknr); | |
4329 | ||
4330 | /* | |
4331 | * Add refrence for header_bh here because it may be | |
4332 | * changed in ocfs2_add_new_xattr_cluster and we need | |
4333 | * to free it in the end. | |
4334 | */ | |
4335 | get_bh(header_bh); | |
4336 | ||
4337 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, | |
4338 | &num_clusters, el); | |
4339 | if (ret) { | |
4340 | mlog_errno(ret); | |
4341 | goto out; | |
4342 | } | |
4343 | ||
970e4936 | 4344 | ret = ocfs2_read_block(inode, p_blkno, &first_bh, NULL); |
01225596 TM |
4345 | if (ret) { |
4346 | mlog_errno(ret); | |
4347 | goto out; | |
4348 | } | |
4349 | ||
4350 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; | |
4351 | first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
4352 | ||
4353 | if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { | |
4354 | ret = ocfs2_add_new_xattr_cluster(inode, | |
4355 | xb_bh, | |
4356 | &first_bh, | |
4357 | &header_bh, | |
4358 | &num_clusters, | |
4359 | e_cpos, | |
4360 | p_blkno, | |
78f30c31 TM |
4361 | &extend, |
4362 | ctxt); | |
01225596 TM |
4363 | if (ret) { |
4364 | mlog_errno(ret); | |
4365 | goto out; | |
4366 | } | |
4367 | } | |
4368 | ||
4369 | if (extend) | |
4370 | ret = ocfs2_extend_xattr_bucket(inode, | |
85db90e7 | 4371 | ctxt->handle, |
01225596 TM |
4372 | first_bh, |
4373 | header_bh, | |
4374 | num_clusters); | |
4375 | if (ret) | |
4376 | mlog_errno(ret); | |
4377 | out: | |
4378 | brelse(first_bh); | |
4379 | brelse(header_bh); | |
4380 | return ret; | |
4381 | } | |
4382 | ||
4383 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4384 | struct ocfs2_xattr_bucket *bucket, | |
4385 | int offs) | |
4386 | { | |
4387 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4388 | ||
4389 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4390 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4391 | } |
4392 | ||
4393 | /* | |
4394 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4395 | * |
4396 | * Note: "local" indicates the real data's locality. So we can't | |
4397 | * just its bucket locality by its length. | |
4398 | */ | |
4399 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4400 | struct ocfs2_xattr_info *xi, | |
4401 | struct ocfs2_xattr_search *xs, | |
4402 | u32 name_hash, | |
5a095611 | 4403 | int local) |
01225596 TM |
4404 | { |
4405 | struct ocfs2_xattr_entry *last, *xe; | |
4406 | int name_len = strlen(xi->name); | |
4407 | struct ocfs2_xattr_header *xh = xs->header; | |
4408 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4409 | size_t blocksize = inode->i_sb->s_blocksize; | |
4410 | char *val; | |
4411 | size_t offs, size, new_size; | |
4412 | ||
4413 | last = &xh->xh_entries[count]; | |
4414 | if (!xs->not_found) { | |
4415 | xe = xs->here; | |
4416 | offs = le16_to_cpu(xe->xe_name_offset); | |
4417 | if (ocfs2_xattr_is_local(xe)) | |
4418 | size = OCFS2_XATTR_SIZE(name_len) + | |
4419 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4420 | else | |
4421 | size = OCFS2_XATTR_SIZE(name_len) + | |
4422 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4423 | ||
4424 | /* | |
4425 | * If the new value will be stored outside, xi->value has been | |
4426 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4427 | * goes with xi->value_len, so we can set new_size safely here. | |
4428 | * See ocfs2_xattr_set_in_bucket. | |
4429 | */ | |
4430 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4431 | OCFS2_XATTR_SIZE(xi->value_len); | |
4432 | ||
4433 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4434 | if (xi->value) { | |
4435 | if (new_size > size) | |
4436 | goto set_new_name_value; | |
4437 | ||
4438 | /* Now replace the old value with new one. */ | |
4439 | if (local) | |
4440 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4441 | else | |
4442 | xe->xe_value_size = 0; | |
4443 | ||
4444 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4445 | xs->bucket, offs); |
01225596 TM |
4446 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4447 | size - OCFS2_XATTR_SIZE(name_len)); | |
4448 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4449 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4450 | xi->value, xi->value_len); | |
4451 | ||
4452 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4453 | ocfs2_xattr_set_local(xe, local); | |
4454 | return; | |
4455 | } else { | |
5a095611 TM |
4456 | /* |
4457 | * Remove the old entry if there is more than one. | |
4458 | * We don't remove the last entry so that we can | |
4459 | * use it to indicate the hash value of the empty | |
4460 | * bucket. | |
4461 | */ | |
01225596 | 4462 | last -= 1; |
01225596 | 4463 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4464 | if (xh->xh_count) { |
4465 | memmove(xe, xe + 1, | |
4466 | (void *)last - (void *)xe); | |
4467 | memset(last, 0, | |
4468 | sizeof(struct ocfs2_xattr_entry)); | |
4469 | } else | |
4470 | xh->xh_free_start = | |
4471 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4472 | ||
01225596 TM |
4473 | return; |
4474 | } | |
4475 | } else { | |
4476 | /* find a new entry for insert. */ | |
4477 | int low = 0, high = count - 1, tmp; | |
4478 | struct ocfs2_xattr_entry *tmp_xe; | |
4479 | ||
5a095611 | 4480 | while (low <= high && count) { |
01225596 TM |
4481 | tmp = (low + high) / 2; |
4482 | tmp_xe = &xh->xh_entries[tmp]; | |
4483 | ||
4484 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4485 | low = tmp + 1; | |
4486 | else if (name_hash < | |
4487 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4488 | high = tmp - 1; | |
06b240d8 TM |
4489 | else { |
4490 | low = tmp; | |
01225596 | 4491 | break; |
06b240d8 | 4492 | } |
01225596 TM |
4493 | } |
4494 | ||
4495 | xe = &xh->xh_entries[low]; | |
4496 | if (low != count) | |
4497 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4498 | ||
4499 | le16_add_cpu(&xh->xh_count, 1); | |
4500 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4501 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4502 | xe->xe_name_len = name_len; | |
4503 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4504 | } | |
4505 | ||
4506 | set_new_name_value: | |
4507 | /* Insert the new name+value. */ | |
4508 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4509 | ||
4510 | /* | |
4511 | * We must make sure that the name/value pair | |
4512 | * exists in the same block. | |
4513 | */ | |
4514 | offs = le16_to_cpu(xh->xh_free_start); | |
4515 | start = offs - size; | |
4516 | ||
4517 | if (start >> inode->i_sb->s_blocksize_bits != | |
4518 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4519 | offs = offs - offs % blocksize; | |
4520 | xh->xh_free_start = cpu_to_le16(offs); | |
4521 | } | |
4522 | ||
ba937127 | 4523 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4524 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4525 | ||
4526 | memset(val, 0, size); | |
4527 | memcpy(val, xi->name, name_len); | |
4528 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4529 | ||
4530 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4531 | ocfs2_xattr_set_local(xe, local); | |
4532 | xs->here = xe; | |
4533 | le16_add_cpu(&xh->xh_free_start, -size); | |
4534 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4535 | ||
4536 | return; | |
4537 | } | |
4538 | ||
01225596 TM |
4539 | /* |
4540 | * Set the xattr entry in the specified bucket. | |
4541 | * The bucket is indicated by xs->bucket and it should have the enough | |
4542 | * space for the xattr insertion. | |
4543 | */ | |
4544 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4545 | handle_t *handle, |
01225596 TM |
4546 | struct ocfs2_xattr_info *xi, |
4547 | struct ocfs2_xattr_search *xs, | |
4548 | u32 name_hash, | |
5a095611 | 4549 | int local) |
01225596 | 4550 | { |
1224be02 | 4551 | int ret; |
02dbf38d | 4552 | u64 blkno; |
01225596 | 4553 | |
ff1ec20e MF |
4554 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4555 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4556 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4557 | |
ba937127 | 4558 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4559 | blkno = bucket_blkno(xs->bucket); |
4560 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4561 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4562 | if (ret) { |
4563 | mlog_errno(ret); | |
4564 | goto out; | |
4565 | } | |
4566 | } | |
4567 | ||
ba937127 | 4568 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4569 | OCFS2_JOURNAL_ACCESS_WRITE); |
4570 | if (ret < 0) { | |
4571 | mlog_errno(ret); | |
4572 | goto out; | |
01225596 TM |
4573 | } |
4574 | ||
5a095611 | 4575 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4576 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4577 | |
01225596 | 4578 | out: |
01225596 TM |
4579 | return ret; |
4580 | } | |
4581 | ||
4582 | static int ocfs2_xattr_value_update_size(struct inode *inode, | |
85db90e7 | 4583 | handle_t *handle, |
01225596 TM |
4584 | struct buffer_head *xe_bh, |
4585 | struct ocfs2_xattr_entry *xe, | |
4586 | u64 new_size) | |
4587 | { | |
4588 | int ret; | |
01225596 TM |
4589 | |
4590 | ret = ocfs2_journal_access(handle, inode, xe_bh, | |
4591 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4592 | if (ret < 0) { | |
4593 | mlog_errno(ret); | |
85db90e7 | 4594 | goto out; |
01225596 TM |
4595 | } |
4596 | ||
4597 | xe->xe_value_size = cpu_to_le64(new_size); | |
4598 | ||
4599 | ret = ocfs2_journal_dirty(handle, xe_bh); | |
4600 | if (ret < 0) | |
4601 | mlog_errno(ret); | |
4602 | ||
01225596 TM |
4603 | out: |
4604 | return ret; | |
4605 | } | |
4606 | ||
4607 | /* | |
4608 | * Truncate the specified xe_off entry in xattr bucket. | |
4609 | * bucket is indicated by header_bh and len is the new length. | |
4610 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4611 | * | |
4612 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4613 | */ | |
4614 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
4615 | struct buffer_head *header_bh, | |
4616 | int xe_off, | |
78f30c31 TM |
4617 | int len, |
4618 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4619 | { |
4620 | int ret, offset; | |
4621 | u64 value_blk; | |
4622 | struct buffer_head *value_bh = NULL; | |
4623 | struct ocfs2_xattr_value_root *xv; | |
4624 | struct ocfs2_xattr_entry *xe; | |
4625 | struct ocfs2_xattr_header *xh = | |
4626 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4627 | size_t blocksize = inode->i_sb->s_blocksize; | |
4628 | ||
4629 | xe = &xh->xh_entries[xe_off]; | |
4630 | ||
4631 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4632 | ||
4633 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4634 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4635 | ||
4636 | value_blk = offset / blocksize; | |
4637 | ||
4638 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4639 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
4640 | value_blk += header_bh->b_blocknr; | |
4641 | ||
970e4936 | 4642 | ret = ocfs2_read_block(inode, value_blk, &value_bh, NULL); |
01225596 TM |
4643 | if (ret) { |
4644 | mlog_errno(ret); | |
4645 | goto out; | |
4646 | } | |
4647 | ||
4648 | xv = (struct ocfs2_xattr_value_root *) | |
4649 | (value_bh->b_data + offset % blocksize); | |
4650 | ||
4651 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4652 | xe_off, (unsigned long long)header_bh->b_blocknr, len); | |
78f30c31 | 4653 | ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt); |
01225596 TM |
4654 | if (ret) { |
4655 | mlog_errno(ret); | |
4656 | goto out; | |
4657 | } | |
4658 | ||
85db90e7 TM |
4659 | ret = ocfs2_xattr_value_update_size(inode, ctxt->handle, |
4660 | header_bh, xe, len); | |
01225596 TM |
4661 | if (ret) { |
4662 | mlog_errno(ret); | |
4663 | goto out; | |
4664 | } | |
4665 | ||
4666 | out: | |
4667 | brelse(value_bh); | |
4668 | return ret; | |
4669 | } | |
4670 | ||
4671 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4672 | struct ocfs2_xattr_search *xs, |
4673 | int len, | |
4674 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4675 | { |
4676 | int ret, offset; | |
4677 | struct ocfs2_xattr_entry *xe = xs->here; | |
4678 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4679 | ||
ba937127 | 4680 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4681 | |
4682 | offset = xe - xh->xh_entries; | |
ba937127 | 4683 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket->bu_bhs[0], |
78f30c31 | 4684 | offset, len, ctxt); |
01225596 TM |
4685 | if (ret) |
4686 | mlog_errno(ret); | |
4687 | ||
4688 | return ret; | |
4689 | } | |
4690 | ||
4691 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4692 | handle_t *handle, |
01225596 TM |
4693 | struct ocfs2_xattr_search *xs, |
4694 | char *val, | |
4695 | int value_len) | |
4696 | { | |
4697 | int offset; | |
4698 | struct ocfs2_xattr_value_root *xv; | |
4699 | struct ocfs2_xattr_entry *xe = xs->here; | |
4700 | ||
4701 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4702 | ||
4703 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4704 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4705 | ||
4706 | xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); | |
4707 | ||
85db90e7 TM |
4708 | return __ocfs2_xattr_set_value_outside(inode, handle, |
4709 | xv, val, value_len); | |
01225596 TM |
4710 | } |
4711 | ||
01225596 TM |
4712 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4713 | struct buffer_head *root_bh, | |
4714 | u64 blkno, | |
4715 | u32 cpos, | |
4716 | u32 len) | |
4717 | { | |
4718 | int ret; | |
4719 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4720 | struct inode *tl_inode = osb->osb_tl_inode; | |
4721 | handle_t *handle; | |
4722 | struct ocfs2_xattr_block *xb = | |
4723 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4724 | struct ocfs2_alloc_context *meta_ac = NULL; |
4725 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4726 | struct ocfs2_extent_tree et; |
4727 | ||
8d6220d6 | 4728 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4729 | |
4730 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4731 | ||
4732 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4733 | cpos, len, (unsigned long long)blkno); | |
4734 | ||
4735 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4736 | ||
f99b9b7c | 4737 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4738 | if (ret) { |
4739 | mlog_errno(ret); | |
4740 | return ret; | |
4741 | } | |
4742 | ||
4743 | mutex_lock(&tl_inode->i_mutex); | |
4744 | ||
4745 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4746 | ret = __ocfs2_flush_truncate_log(osb); | |
4747 | if (ret < 0) { | |
4748 | mlog_errno(ret); | |
4749 | goto out; | |
4750 | } | |
4751 | } | |
4752 | ||
4753 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
d3264799 | 4754 | if (IS_ERR(handle)) { |
01225596 TM |
4755 | ret = -ENOMEM; |
4756 | mlog_errno(ret); | |
4757 | goto out; | |
4758 | } | |
4759 | ||
4760 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
4761 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4762 | if (ret) { | |
4763 | mlog_errno(ret); | |
4764 | goto out_commit; | |
4765 | } | |
4766 | ||
f99b9b7c JB |
4767 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4768 | &dealloc); | |
01225596 TM |
4769 | if (ret) { |
4770 | mlog_errno(ret); | |
4771 | goto out_commit; | |
4772 | } | |
4773 | ||
4774 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4775 | ||
4776 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4777 | if (ret) { | |
4778 | mlog_errno(ret); | |
4779 | goto out_commit; | |
4780 | } | |
4781 | ||
4782 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4783 | if (ret) | |
4784 | mlog_errno(ret); | |
4785 | ||
4786 | out_commit: | |
4787 | ocfs2_commit_trans(osb, handle); | |
4788 | out: | |
4789 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4790 | ||
4791 | mutex_unlock(&tl_inode->i_mutex); | |
4792 | ||
4793 | if (meta_ac) | |
4794 | ocfs2_free_alloc_context(meta_ac); | |
4795 | ||
4796 | ocfs2_run_deallocs(osb, &dealloc); | |
4797 | ||
4798 | return ret; | |
4799 | } | |
4800 | ||
01225596 | 4801 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 4802 | handle_t *handle, |
01225596 TM |
4803 | struct ocfs2_xattr_search *xs) |
4804 | { | |
ba937127 | 4805 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4806 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4807 | le16_to_cpu(xh->xh_count) - 1]; | |
4808 | int ret = 0; | |
4809 | ||
ba937127 | 4810 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4811 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4812 | if (ret) { |
4813 | mlog_errno(ret); | |
85db90e7 | 4814 | return; |
01225596 TM |
4815 | } |
4816 | ||
4817 | /* Remove the old entry. */ | |
4818 | memmove(xs->here, xs->here + 1, | |
4819 | (void *)last - (void *)xs->here); | |
4820 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4821 | le16_add_cpu(&xh->xh_count, -1); | |
4822 | ||
ba937127 | 4823 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
4824 | } |
4825 | ||
4826 | /* | |
4827 | * Set the xattr name/value in the bucket specified in xs. | |
4828 | * | |
4829 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4830 | * we divide the whole process into 3 steps: | |
4831 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4832 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4833 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4834 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4835 | * to free the xattr we allocated in set. | |
4836 | */ | |
4837 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4838 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4839 | struct ocfs2_xattr_search *xs, |
4840 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4841 | { |
5a095611 | 4842 | int ret, local = 1; |
01225596 TM |
4843 | size_t value_len; |
4844 | char *val = (char *)xi->value; | |
4845 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4846 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4847 | strlen(xi->name)); | |
01225596 TM |
4848 | |
4849 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4850 | /* | |
4851 | * We need to truncate the xattr storage first. | |
4852 | * | |
4853 | * If both the old and new value are stored to | |
4854 | * outside block, we only need to truncate | |
4855 | * the storage and then set the value outside. | |
4856 | * | |
4857 | * If the new value should be stored within block, | |
4858 | * we should free all the outside block first and | |
4859 | * the modification to the xattr block will be done | |
4860 | * by following steps. | |
4861 | */ | |
4862 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4863 | value_len = xi->value_len; | |
4864 | else | |
4865 | value_len = 0; | |
4866 | ||
4867 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
4868 | value_len, |
4869 | ctxt); | |
01225596 TM |
4870 | if (ret) |
4871 | goto out; | |
4872 | ||
4873 | if (value_len) | |
4874 | goto set_value_outside; | |
4875 | } | |
4876 | ||
4877 | value_len = xi->value_len; | |
4878 | /* So we have to handle the inside block change now. */ | |
4879 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4880 | /* | |
4881 | * If the new value will be stored outside of block, | |
4882 | * initalize a new empty value root and insert it first. | |
4883 | */ | |
4884 | local = 0; | |
4885 | xi->value = &def_xv; | |
4886 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4887 | } | |
4888 | ||
85db90e7 TM |
4889 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
4890 | name_hash, local); | |
01225596 TM |
4891 | if (ret) { |
4892 | mlog_errno(ret); | |
4893 | goto out; | |
4894 | } | |
4895 | ||
5a095611 TM |
4896 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
4897 | goto out; | |
01225596 | 4898 | |
5a095611 TM |
4899 | /* allocate the space now for the outside block storage. */ |
4900 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 4901 | value_len, ctxt); |
5a095611 TM |
4902 | if (ret) { |
4903 | mlog_errno(ret); | |
4904 | ||
4905 | if (xs->not_found) { | |
4906 | /* | |
4907 | * We can't allocate enough clusters for outside | |
4908 | * storage and we have allocated xattr already, | |
4909 | * so need to remove it. | |
4910 | */ | |
85db90e7 | 4911 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 4912 | } |
01225596 TM |
4913 | goto out; |
4914 | } | |
4915 | ||
4916 | set_value_outside: | |
85db90e7 TM |
4917 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
4918 | xs, val, value_len); | |
01225596 TM |
4919 | out: |
4920 | return ret; | |
4921 | } | |
4922 | ||
80bcaf34 TM |
4923 | /* |
4924 | * check whether the xattr bucket is filled up with the same hash value. | |
4925 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
4926 | * If we want to insert a xattr with different hash value, go ahead | |
4927 | * and ocfs2_divide_xattr_bucket will handle this. | |
4928 | */ | |
01225596 | 4929 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
4930 | struct ocfs2_xattr_bucket *bucket, |
4931 | const char *name) | |
01225596 | 4932 | { |
3e632946 | 4933 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
4934 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
4935 | ||
4936 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
4937 | return 0; | |
01225596 TM |
4938 | |
4939 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
4940 | xh->xh_entries[0].xe_name_hash) { | |
4941 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
4942 | "hash = %u\n", | |
9c7759aa | 4943 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
4944 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
4945 | return -ENOSPC; | |
4946 | } | |
4947 | ||
4948 | return 0; | |
4949 | } | |
4950 | ||
4951 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
4952 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4953 | struct ocfs2_xattr_search *xs, |
4954 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4955 | { |
4956 | struct ocfs2_xattr_header *xh; | |
4957 | struct ocfs2_xattr_entry *xe; | |
4958 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 4959 | int free, max_free, need, old; |
01225596 TM |
4960 | size_t value_size = 0, name_len = strlen(xi->name); |
4961 | size_t blocksize = inode->i_sb->s_blocksize; | |
4962 | int ret, allocation = 0; | |
01225596 TM |
4963 | |
4964 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
4965 | ||
4966 | try_again: | |
4967 | xh = xs->header; | |
4968 | count = le16_to_cpu(xh->xh_count); | |
4969 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4970 | header_size = sizeof(struct ocfs2_xattr_header) + | |
4971 | count * sizeof(struct ocfs2_xattr_entry); | |
4972 | max_free = OCFS2_XATTR_BUCKET_SIZE - | |
4973 | le16_to_cpu(xh->xh_name_value_len) - header_size; | |
4974 | ||
4975 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
4976 | "of %u which exceed block size\n", | |
ba937127 | 4977 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
4978 | header_size); |
4979 | ||
4980 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4981 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
4982 | else if (xi->value) | |
4983 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
4984 | ||
4985 | if (xs->not_found) | |
4986 | need = sizeof(struct ocfs2_xattr_entry) + | |
4987 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
4988 | else { | |
4989 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
4990 | ||
4991 | /* | |
4992 | * We only replace the old value if the new length is smaller | |
4993 | * than the old one. Otherwise we will allocate new space in the | |
4994 | * bucket to store it. | |
4995 | */ | |
4996 | xe = xs->here; | |
4997 | if (ocfs2_xattr_is_local(xe)) | |
4998 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4999 | else | |
5000 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5001 | ||
5002 | if (old >= value_size) | |
5003 | need = 0; | |
5004 | } | |
5005 | ||
5006 | free = xh_free_start - header_size; | |
5007 | /* | |
5008 | * We need to make sure the new name/value pair | |
5009 | * can exist in the same block. | |
5010 | */ | |
5011 | if (xh_free_start % blocksize < need) | |
5012 | free -= xh_free_start % blocksize; | |
5013 | ||
5014 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5015 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5016 | " %u\n", xs->not_found, | |
ba937127 | 5017 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5018 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5019 | le16_to_cpu(xh->xh_name_value_len)); | |
5020 | ||
976331d8 TM |
5021 | if (free < need || |
5022 | (xs->not_found && | |
5023 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5024 | if (need <= max_free && |
5025 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5026 | /* | |
5027 | * We can create the space by defragment. Since only the | |
5028 | * name/value will be moved, the xe shouldn't be changed | |
5029 | * in xs. | |
5030 | */ | |
85db90e7 TM |
5031 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5032 | xs->bucket); | |
01225596 TM |
5033 | if (ret) { |
5034 | mlog_errno(ret); | |
5035 | goto out; | |
5036 | } | |
5037 | ||
5038 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5039 | free = xh_free_start - header_size; | |
5040 | if (xh_free_start % blocksize < need) | |
5041 | free -= xh_free_start % blocksize; | |
5042 | ||
5043 | if (free >= need) | |
5044 | goto xattr_set; | |
5045 | ||
5046 | mlog(0, "Can't get enough space for xattr insert by " | |
5047 | "defragment. Need %u bytes, but we have %d, so " | |
5048 | "allocate new bucket for it.\n", need, free); | |
5049 | } | |
5050 | ||
5051 | /* | |
5052 | * We have to add new buckets or clusters and one | |
5053 | * allocation should leave us enough space for insert. | |
5054 | */ | |
5055 | BUG_ON(allocation); | |
5056 | ||
5057 | /* | |
5058 | * We do not allow for overlapping ranges between buckets. And | |
5059 | * the maximum number of collisions we will allow for then is | |
5060 | * one bucket's worth, so check it here whether we need to | |
5061 | * add a new bucket for the insert. | |
5062 | */ | |
80bcaf34 | 5063 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5064 | xs->bucket, |
80bcaf34 | 5065 | xi->name); |
01225596 TM |
5066 | if (ret) { |
5067 | mlog_errno(ret); | |
5068 | goto out; | |
5069 | } | |
5070 | ||
5071 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5072 | xs->xattr_bh, | |
78f30c31 TM |
5073 | xs->bucket->bu_bhs[0], |
5074 | ctxt); | |
01225596 TM |
5075 | if (ret) { |
5076 | mlog_errno(ret); | |
5077 | goto out; | |
5078 | } | |
5079 | ||
ba937127 | 5080 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5081 | |
5082 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
5083 | xi->name_index, | |
5084 | xi->name, xs); | |
5085 | if (ret && ret != -ENODATA) | |
5086 | goto out; | |
5087 | xs->not_found = ret; | |
5088 | allocation = 1; | |
5089 | goto try_again; | |
5090 | } | |
5091 | ||
5092 | xattr_set: | |
78f30c31 | 5093 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5094 | out: |
5095 | mlog_exit(ret); | |
5096 | return ret; | |
5097 | } | |
a3944256 TM |
5098 | |
5099 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5100 | struct ocfs2_xattr_bucket *bucket, | |
5101 | void *para) | |
5102 | { | |
5103 | int ret = 0; | |
3e632946 | 5104 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5105 | u16 i; |
5106 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5107 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5108 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
5109 | ||
5110 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 | 5111 | |
85db90e7 TM |
5112 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); |
5113 | if (IS_ERR(ctxt.handle)) { | |
5114 | ret = PTR_ERR(ctxt.handle); | |
5115 | mlog_errno(ret); | |
5116 | goto out; | |
5117 | } | |
5118 | ||
a3944256 TM |
5119 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
5120 | xe = &xh->xh_entries[i]; | |
5121 | if (ocfs2_xattr_is_local(xe)) | |
5122 | continue; | |
5123 | ||
5124 | ret = ocfs2_xattr_bucket_value_truncate(inode, | |
4ac6032d | 5125 | bucket->bu_bhs[0], |
78f30c31 | 5126 | i, 0, &ctxt); |
a3944256 TM |
5127 | if (ret) { |
5128 | mlog_errno(ret); | |
5129 | break; | |
5130 | } | |
5131 | } | |
5132 | ||
85db90e7 | 5133 | ret = ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
5134 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5135 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 5136 | out: |
a3944256 TM |
5137 | return ret; |
5138 | } | |
5139 | ||
5140 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
5141 | struct buffer_head *xb_bh) | |
5142 | { | |
5143 | struct ocfs2_xattr_block *xb = | |
5144 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5145 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
5146 | int ret = 0; | |
5147 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
5148 | u64 p_blkno; | |
5149 | ||
5150 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
5151 | return 0; | |
5152 | ||
5153 | while (name_hash > 0) { | |
5154 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
5155 | &e_cpos, &num_clusters, el); | |
5156 | if (ret) { | |
5157 | mlog_errno(ret); | |
5158 | goto out; | |
5159 | } | |
5160 | ||
5161 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
5162 | ocfs2_delete_xattr_in_bucket, | |
5163 | NULL); | |
5164 | if (ret) { | |
5165 | mlog_errno(ret); | |
5166 | goto out; | |
5167 | } | |
5168 | ||
5169 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
5170 | p_blkno, e_cpos, num_clusters); | |
5171 | if (ret) { | |
5172 | mlog_errno(ret); | |
5173 | break; | |
5174 | } | |
5175 | ||
5176 | if (e_cpos == 0) | |
5177 | break; | |
5178 | ||
5179 | name_hash = e_cpos - 1; | |
5180 | } | |
5181 | ||
5182 | out: | |
5183 | return ret; | |
5184 | } | |
99219aea | 5185 | |
923f7f31 TY |
5186 | /* |
5187 | * 'security' attributes support | |
5188 | */ | |
5189 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5190 | size_t list_size, const char *name, | |
5191 | size_t name_len) | |
5192 | { | |
5193 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5194 | const size_t total_len = prefix_len + name_len + 1; | |
5195 | ||
5196 | if (list && total_len <= list_size) { | |
5197 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5198 | memcpy(list + prefix_len, name, name_len); | |
5199 | list[prefix_len + name_len] = '\0'; | |
5200 | } | |
5201 | return total_len; | |
5202 | } | |
5203 | ||
5204 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5205 | void *buffer, size_t size) | |
5206 | { | |
5207 | if (strcmp(name, "") == 0) | |
5208 | return -EINVAL; | |
5209 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5210 | buffer, size); | |
5211 | } | |
5212 | ||
5213 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5214 | const void *value, size_t size, int flags) | |
5215 | { | |
5216 | if (strcmp(name, "") == 0) | |
5217 | return -EINVAL; | |
5218 | ||
5219 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5220 | size, flags); | |
5221 | } | |
5222 | ||
534eaddd TY |
5223 | int ocfs2_init_security_get(struct inode *inode, |
5224 | struct inode *dir, | |
5225 | struct ocfs2_security_xattr_info *si) | |
5226 | { | |
5227 | return security_inode_init_security(inode, dir, &si->name, &si->value, | |
5228 | &si->value_len); | |
5229 | } | |
5230 | ||
5231 | int ocfs2_init_security_set(handle_t *handle, | |
5232 | struct inode *inode, | |
5233 | struct buffer_head *di_bh, | |
5234 | struct ocfs2_security_xattr_info *si, | |
5235 | struct ocfs2_alloc_context *xattr_ac, | |
5236 | struct ocfs2_alloc_context *data_ac) | |
5237 | { | |
5238 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5239 | OCFS2_XATTR_INDEX_SECURITY, | |
5240 | si->name, si->value, si->value_len, 0, | |
5241 | xattr_ac, data_ac); | |
5242 | } | |
5243 | ||
923f7f31 TY |
5244 | struct xattr_handler ocfs2_xattr_security_handler = { |
5245 | .prefix = XATTR_SECURITY_PREFIX, | |
5246 | .list = ocfs2_xattr_security_list, | |
5247 | .get = ocfs2_xattr_security_get, | |
5248 | .set = ocfs2_xattr_security_set, | |
5249 | }; | |
5250 | ||
99219aea MF |
5251 | /* |
5252 | * 'trusted' attributes support | |
5253 | */ | |
99219aea MF |
5254 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5255 | size_t list_size, const char *name, | |
5256 | size_t name_len) | |
5257 | { | |
ceb1eba3 | 5258 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5259 | const size_t total_len = prefix_len + name_len + 1; |
5260 | ||
5261 | if (list && total_len <= list_size) { | |
5262 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5263 | memcpy(list + prefix_len, name, name_len); | |
5264 | list[prefix_len + name_len] = '\0'; | |
5265 | } | |
5266 | return total_len; | |
5267 | } | |
5268 | ||
5269 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5270 | void *buffer, size_t size) | |
5271 | { | |
5272 | if (strcmp(name, "") == 0) | |
5273 | return -EINVAL; | |
5274 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5275 | buffer, size); | |
5276 | } | |
5277 | ||
5278 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5279 | const void *value, size_t size, int flags) | |
5280 | { | |
5281 | if (strcmp(name, "") == 0) | |
5282 | return -EINVAL; | |
5283 | ||
5284 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5285 | size, flags); | |
5286 | } | |
5287 | ||
5288 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5289 | .prefix = XATTR_TRUSTED_PREFIX, | |
5290 | .list = ocfs2_xattr_trusted_list, | |
5291 | .get = ocfs2_xattr_trusted_get, | |
5292 | .set = ocfs2_xattr_trusted_set, | |
5293 | }; | |
5294 | ||
99219aea MF |
5295 | /* |
5296 | * 'user' attributes support | |
5297 | */ | |
99219aea MF |
5298 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5299 | size_t list_size, const char *name, | |
5300 | size_t name_len) | |
5301 | { | |
ceb1eba3 | 5302 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5303 | const size_t total_len = prefix_len + name_len + 1; |
5304 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5305 | ||
5306 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5307 | return 0; | |
5308 | ||
5309 | if (list && total_len <= list_size) { | |
5310 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5311 | memcpy(list + prefix_len, name, name_len); | |
5312 | list[prefix_len + name_len] = '\0'; | |
5313 | } | |
5314 | return total_len; | |
5315 | } | |
5316 | ||
5317 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5318 | void *buffer, size_t size) | |
5319 | { | |
5320 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5321 | ||
5322 | if (strcmp(name, "") == 0) | |
5323 | return -EINVAL; | |
5324 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5325 | return -EOPNOTSUPP; | |
5326 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5327 | buffer, size); | |
5328 | } | |
5329 | ||
5330 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5331 | const void *value, size_t size, int flags) | |
5332 | { | |
5333 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5334 | ||
5335 | if (strcmp(name, "") == 0) | |
5336 | return -EINVAL; | |
5337 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5338 | return -EOPNOTSUPP; | |
5339 | ||
5340 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5341 | size, flags); | |
5342 | } | |
5343 | ||
5344 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5345 | .prefix = XATTR_USER_PREFIX, | |
5346 | .list = ocfs2_xattr_user_list, | |
5347 | .get = ocfs2_xattr_user_get, | |
5348 | .set = ocfs2_xattr_user_set, | |
5349 | }; |