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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" | |
d6b32bbb | 45 | #include "blockcheck.h" |
f56654c4 TM |
46 | #include "dlmglue.h" |
47 | #include "file.h" | |
cf1d6c76 TY |
48 | #include "symlink.h" |
49 | #include "sysfile.h" | |
f56654c4 TM |
50 | #include "inode.h" |
51 | #include "journal.h" | |
52 | #include "ocfs2_fs.h" | |
53 | #include "suballoc.h" | |
54 | #include "uptodate.h" | |
55 | #include "buffer_head_io.h" | |
0c044f0b | 56 | #include "super.h" |
cf1d6c76 TY |
57 | #include "xattr.h" |
58 | ||
59 | ||
60 | struct ocfs2_xattr_def_value_root { | |
61 | struct ocfs2_xattr_value_root xv; | |
62 | struct ocfs2_extent_rec er; | |
63 | }; | |
64 | ||
0c044f0b | 65 | struct ocfs2_xattr_bucket { |
ba937127 JB |
66 | /* The inode these xattrs are associated with */ |
67 | struct inode *bu_inode; | |
68 | ||
69 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 70 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
71 | |
72 | /* How many blocks make up one bucket for this filesystem */ | |
73 | int bu_blocks; | |
0c044f0b TM |
74 | }; |
75 | ||
78f30c31 | 76 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 77 | handle_t *handle; |
78f30c31 TM |
78 | struct ocfs2_alloc_context *meta_ac; |
79 | struct ocfs2_alloc_context *data_ac; | |
80 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
81 | }; | |
82 | ||
cf1d6c76 TY |
83 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
84 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 85 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
86 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
87 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 88 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
89 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
90 | - sizeof(struct ocfs2_xattr_block) \ | |
91 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 92 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
93 | |
94 | static struct ocfs2_xattr_def_value_root def_xv = { | |
95 | .xv.xr_list.l_count = cpu_to_le16(1), | |
96 | }; | |
97 | ||
98 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
99 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
100 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
101 | &ocfs2_xattr_acl_access_handler, | |
102 | &ocfs2_xattr_acl_default_handler, | |
103 | #endif | |
cf1d6c76 | 104 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 105 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
106 | NULL |
107 | }; | |
108 | ||
c988fd04 | 109 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
111 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
112 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] | |
113 | = &ocfs2_xattr_acl_access_handler, | |
114 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
115 | = &ocfs2_xattr_acl_default_handler, | |
116 | #endif | |
cf1d6c76 | 117 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 118 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
119 | }; |
120 | ||
121 | struct ocfs2_xattr_info { | |
122 | int name_index; | |
123 | const char *name; | |
124 | const void *value; | |
125 | size_t value_len; | |
126 | }; | |
127 | ||
128 | struct ocfs2_xattr_search { | |
129 | struct buffer_head *inode_bh; | |
130 | /* | |
131 | * xattr_bh point to the block buffer head which has extended attribute | |
132 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
133 | */ | |
134 | struct buffer_head *xattr_bh; | |
135 | struct ocfs2_xattr_header *header; | |
ba937127 | 136 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
137 | void *base; |
138 | void *end; | |
139 | struct ocfs2_xattr_entry *here; | |
140 | int not_found; | |
141 | }; | |
142 | ||
589dc260 TM |
143 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
144 | struct ocfs2_xattr_header *xh, | |
145 | int index, | |
146 | int *block_off, | |
147 | int *new_offset); | |
148 | ||
54f443f4 JB |
149 | static int ocfs2_xattr_block_find(struct inode *inode, |
150 | int name_index, | |
151 | const char *name, | |
152 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
153 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
154 | struct buffer_head *root_bh, | |
155 | int name_index, | |
156 | const char *name, | |
157 | struct ocfs2_xattr_search *xs); | |
158 | ||
0c044f0b TM |
159 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
160 | struct ocfs2_xattr_tree_root *xt, | |
161 | char *buffer, | |
162 | size_t buffer_size); | |
163 | ||
01225596 | 164 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
165 | struct ocfs2_xattr_search *xs, |
166 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
167 | |
168 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
169 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
170 | struct ocfs2_xattr_search *xs, |
171 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 172 | |
a3944256 TM |
173 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
174 | struct buffer_head *xb_bh); | |
c58b6032 JB |
175 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
176 | u64 src_blk, u64 last_blk, u64 to_blk, | |
177 | unsigned int start_bucket, | |
178 | u32 *first_hash); | |
a3944256 | 179 | |
0030e001 TY |
180 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
181 | { | |
182 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
183 | } | |
184 | ||
185 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
186 | { | |
187 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
188 | } | |
189 | ||
190 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
191 | { | |
192 | u16 len = sb->s_blocksize - | |
193 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
194 | ||
195 | return len / sizeof(struct ocfs2_xattr_entry); | |
196 | } | |
197 | ||
9c7759aa | 198 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 199 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 200 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 201 | |
ba937127 | 202 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 203 | { |
ba937127 JB |
204 | struct ocfs2_xattr_bucket *bucket; |
205 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 206 | |
ba937127 JB |
207 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
208 | ||
209 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
210 | if (bucket) { | |
211 | bucket->bu_inode = inode; | |
212 | bucket->bu_blocks = blks; | |
213 | } | |
214 | ||
215 | return bucket; | |
216 | } | |
217 | ||
218 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
219 | { | |
220 | int i; | |
221 | ||
222 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
223 | brelse(bucket->bu_bhs[i]); |
224 | bucket->bu_bhs[i] = NULL; | |
225 | } | |
226 | } | |
227 | ||
ba937127 JB |
228 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
229 | { | |
230 | if (bucket) { | |
231 | ocfs2_xattr_bucket_relse(bucket); | |
232 | bucket->bu_inode = NULL; | |
233 | kfree(bucket); | |
234 | } | |
235 | } | |
236 | ||
784b816a JB |
237 | /* |
238 | * A bucket that has never been written to disk doesn't need to be | |
239 | * read. We just need the buffer_heads. Don't call this for | |
240 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
241 | * them fully. | |
242 | */ | |
ba937127 | 243 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
244 | u64 xb_blkno) |
245 | { | |
246 | int i, rc = 0; | |
784b816a | 247 | |
ba937127 JB |
248 | for (i = 0; i < bucket->bu_blocks; i++) { |
249 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
250 | xb_blkno + i); | |
784b816a JB |
251 | if (!bucket->bu_bhs[i]) { |
252 | rc = -EIO; | |
253 | mlog_errno(rc); | |
254 | break; | |
255 | } | |
256 | ||
8cb471e8 | 257 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 258 | bucket->bu_bhs[i])) |
8cb471e8 | 259 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 260 | bucket->bu_bhs[i]); |
784b816a JB |
261 | } |
262 | ||
263 | if (rc) | |
ba937127 | 264 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
265 | return rc; |
266 | } | |
267 | ||
268 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 269 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
270 | u64 xb_blkno) |
271 | { | |
ba937127 | 272 | int rc; |
784b816a | 273 | |
8cb471e8 | 274 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
275 | bucket->bu_blocks, bucket->bu_bhs, 0, |
276 | NULL); | |
4d0e214e | 277 | if (!rc) { |
c8b9cf9a | 278 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
279 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
280 | bucket->bu_bhs, | |
281 | bucket->bu_blocks, | |
282 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 283 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
284 | if (rc) |
285 | mlog_errno(rc); | |
286 | } | |
287 | ||
784b816a | 288 | if (rc) |
ba937127 | 289 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
290 | return rc; |
291 | } | |
292 | ||
1224be02 | 293 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
294 | struct ocfs2_xattr_bucket *bucket, |
295 | int type) | |
296 | { | |
297 | int i, rc = 0; | |
1224be02 | 298 | |
ba937127 | 299 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
300 | rc = ocfs2_journal_access(handle, |
301 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
302 | bucket->bu_bhs[i], type); |
303 | if (rc) { | |
304 | mlog_errno(rc); | |
305 | break; | |
306 | } | |
307 | } | |
308 | ||
309 | return rc; | |
310 | } | |
311 | ||
312 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
313 | struct ocfs2_xattr_bucket *bucket) |
314 | { | |
ba937127 | 315 | int i; |
1224be02 | 316 | |
c8b9cf9a | 317 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
318 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
319 | bucket->bu_bhs, bucket->bu_blocks, | |
320 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 321 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 322 | |
ba937127 | 323 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
324 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
325 | } | |
326 | ||
ba937127 | 327 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
328 | struct ocfs2_xattr_bucket *src) |
329 | { | |
330 | int i; | |
ba937127 JB |
331 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
332 | ||
333 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
334 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 335 | |
ba937127 | 336 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
337 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
338 | blocksize); | |
339 | } | |
340 | } | |
1224be02 | 341 | |
4ae1d69b JB |
342 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
343 | struct buffer_head *bh) | |
344 | { | |
d6b32bbb | 345 | int rc; |
4ae1d69b JB |
346 | struct ocfs2_xattr_block *xb = |
347 | (struct ocfs2_xattr_block *)bh->b_data; | |
348 | ||
349 | mlog(0, "Validating xattr block %llu\n", | |
350 | (unsigned long long)bh->b_blocknr); | |
351 | ||
d6b32bbb JB |
352 | BUG_ON(!buffer_uptodate(bh)); |
353 | ||
354 | /* | |
355 | * If the ecc fails, we return the error but otherwise | |
356 | * leave the filesystem running. We know any error is | |
357 | * local to this block. | |
358 | */ | |
359 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
360 | if (rc) | |
361 | return rc; | |
362 | ||
363 | /* | |
364 | * Errors after here are fatal | |
365 | */ | |
366 | ||
4ae1d69b JB |
367 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
368 | ocfs2_error(sb, | |
369 | "Extended attribute block #%llu has bad " | |
370 | "signature %.*s", | |
371 | (unsigned long long)bh->b_blocknr, 7, | |
372 | xb->xb_signature); | |
373 | return -EINVAL; | |
374 | } | |
375 | ||
376 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
377 | ocfs2_error(sb, | |
378 | "Extended attribute block #%llu has an " | |
379 | "invalid xb_blkno of %llu", | |
380 | (unsigned long long)bh->b_blocknr, | |
381 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
382 | return -EINVAL; | |
383 | } | |
384 | ||
385 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
386 | ocfs2_error(sb, | |
387 | "Extended attribute block #%llu has an invalid " | |
388 | "xb_fs_generation of #%u", | |
389 | (unsigned long long)bh->b_blocknr, | |
390 | le32_to_cpu(xb->xb_fs_generation)); | |
391 | return -EINVAL; | |
392 | } | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
398 | struct buffer_head **bh) | |
399 | { | |
400 | int rc; | |
401 | struct buffer_head *tmp = *bh; | |
402 | ||
8cb471e8 | 403 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 404 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
405 | |
406 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
407 | if (!rc && !*bh) | |
408 | *bh = tmp; | |
409 | ||
410 | return rc; | |
411 | } | |
412 | ||
936b8834 | 413 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
414 | { |
415 | struct xattr_handler *handler = NULL; | |
416 | ||
417 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
418 | handler = ocfs2_xattr_handler_map[name_index]; | |
419 | ||
936b8834 | 420 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
421 | } |
422 | ||
40daa16a | 423 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 424 | const char *name, |
40daa16a | 425 | int name_len) |
cf1d6c76 TY |
426 | { |
427 | /* Get hash value of uuid from super block */ | |
428 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
429 | int i; | |
430 | ||
cf1d6c76 TY |
431 | /* hash extended attribute name */ |
432 | for (i = 0; i < name_len; i++) { | |
433 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
434 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
435 | *name++; | |
436 | } | |
437 | ||
438 | return hash; | |
439 | } | |
440 | ||
441 | /* | |
442 | * ocfs2_xattr_hash_entry() | |
443 | * | |
444 | * Compute the hash of an extended attribute. | |
445 | */ | |
446 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
447 | struct ocfs2_xattr_header *header, | |
448 | struct ocfs2_xattr_entry *entry) | |
449 | { | |
450 | u32 hash = 0; | |
cf1d6c76 | 451 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 452 | |
2057e5c6 | 453 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
454 | entry->xe_name_hash = cpu_to_le32(hash); |
455 | ||
456 | return; | |
457 | } | |
f56654c4 | 458 | |
534eaddd TY |
459 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
460 | { | |
461 | int size = 0; | |
462 | ||
463 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
464 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
465 | else | |
466 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
467 | size += sizeof(struct ocfs2_xattr_entry); | |
468 | ||
469 | return size; | |
470 | } | |
471 | ||
472 | int ocfs2_calc_security_init(struct inode *dir, | |
473 | struct ocfs2_security_xattr_info *si, | |
474 | int *want_clusters, | |
475 | int *xattr_credits, | |
476 | struct ocfs2_alloc_context **xattr_ac) | |
477 | { | |
478 | int ret = 0; | |
479 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
480 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
481 | si->value_len); | |
482 | ||
483 | /* | |
484 | * The max space of security xattr taken inline is | |
485 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
486 | * So reserve one metadata block for it is ok. | |
487 | */ | |
488 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
489 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
490 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
491 | if (ret) { | |
492 | mlog_errno(ret); | |
493 | return ret; | |
494 | } | |
495 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
496 | } | |
497 | ||
498 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
499 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
500 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
501 | si->value_len); | |
502 | ||
503 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
504 | new_clusters); | |
505 | *want_clusters += new_clusters; | |
506 | } | |
534eaddd TY |
507 | return ret; |
508 | } | |
509 | ||
89c38bd0 TY |
510 | int ocfs2_calc_xattr_init(struct inode *dir, |
511 | struct buffer_head *dir_bh, | |
512 | int mode, | |
513 | struct ocfs2_security_xattr_info *si, | |
514 | int *want_clusters, | |
515 | int *xattr_credits, | |
9b7895ef | 516 | int *want_meta) |
89c38bd0 TY |
517 | { |
518 | int ret = 0; | |
519 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 520 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
521 | |
522 | if (si->enable) | |
523 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
524 | si->value_len); | |
525 | ||
526 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
527 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
528 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
529 | "", NULL, 0); | |
530 | if (acl_len > 0) { | |
531 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
532 | if (S_ISDIR(mode)) | |
533 | a_size <<= 1; | |
534 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
535 | mlog_errno(ret); | |
536 | return ret; | |
537 | } | |
538 | } | |
539 | ||
540 | if (!(s_size + a_size)) | |
541 | return ret; | |
542 | ||
543 | /* | |
544 | * The max space of security xattr taken inline is | |
545 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
546 | * The max space of acl xattr taken inline is | |
547 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
548 | * when blocksize = 512, may reserve one more cluser for | |
549 | * xattr bucket, otherwise reserve one metadata block | |
550 | * for them is ok. | |
6c9fd1dc TY |
551 | * If this is a new directory with inline data, |
552 | * we choose to reserve the entire inline area for | |
553 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
554 | */ |
555 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 556 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 557 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 558 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
559 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
560 | } | |
561 | ||
562 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
563 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
564 | *want_clusters += 1; | |
565 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
566 | } | |
567 | ||
0e445b6f TY |
568 | /* |
569 | * reserve credits and clusters for xattrs which has large value | |
570 | * and have to be set outside | |
571 | */ | |
572 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
573 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
574 | si->value_len); | |
575 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
576 | new_clusters); | |
577 | *want_clusters += new_clusters; | |
578 | } | |
89c38bd0 TY |
579 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
580 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
581 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
582 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
583 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
584 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
585 | new_clusters); | |
586 | *want_clusters += new_clusters; | |
89c38bd0 TY |
587 | } |
588 | ||
589 | return ret; | |
590 | } | |
591 | ||
f56654c4 TM |
592 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
593 | u32 clusters_to_add, | |
19b801f4 | 594 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 595 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
596 | { |
597 | int status = 0; | |
85db90e7 | 598 | handle_t *handle = ctxt->handle; |
f56654c4 TM |
599 | enum ocfs2_alloc_restarted why; |
600 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
19b801f4 | 601 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 602 | struct ocfs2_extent_tree et; |
f56654c4 TM |
603 | |
604 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
605 | ||
19b801f4 | 606 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f99b9b7c | 607 | |
0cf2f763 | 608 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 609 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
610 | if (status < 0) { |
611 | mlog_errno(status); | |
612 | goto leave; | |
613 | } | |
614 | ||
19b801f4 | 615 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
616 | status = ocfs2_add_clusters_in_btree(osb, |
617 | inode, | |
618 | &logical_start, | |
619 | clusters_to_add, | |
620 | 0, | |
f99b9b7c | 621 | &et, |
f56654c4 | 622 | handle, |
78f30c31 TM |
623 | ctxt->data_ac, |
624 | ctxt->meta_ac, | |
f99b9b7c | 625 | &why); |
85db90e7 TM |
626 | if (status < 0) { |
627 | mlog_errno(status); | |
f56654c4 TM |
628 | goto leave; |
629 | } | |
630 | ||
19b801f4 | 631 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
632 | if (status < 0) { |
633 | mlog_errno(status); | |
634 | goto leave; | |
635 | } | |
636 | ||
19b801f4 | 637 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 638 | |
85db90e7 TM |
639 | /* |
640 | * We should have already allocated enough space before the transaction, | |
641 | * so no need to restart. | |
642 | */ | |
643 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
644 | |
645 | leave: | |
f56654c4 TM |
646 | |
647 | return status; | |
648 | } | |
649 | ||
650 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 651 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 652 | u32 cpos, u32 phys_cpos, u32 len, |
78f30c31 | 653 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
654 | { |
655 | int ret; | |
656 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 657 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
658 | struct ocfs2_extent_tree et; |
659 | ||
d72cc72d | 660 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f56654c4 | 661 | |
0cf2f763 | 662 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 663 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
664 | if (ret) { |
665 | mlog_errno(ret); | |
85db90e7 | 666 | goto out; |
f56654c4 TM |
667 | } |
668 | ||
78f30c31 TM |
669 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, |
670 | &ctxt->dealloc); | |
f56654c4 TM |
671 | if (ret) { |
672 | mlog_errno(ret); | |
85db90e7 | 673 | goto out; |
f56654c4 TM |
674 | } |
675 | ||
d72cc72d | 676 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 677 | |
d72cc72d | 678 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
679 | if (ret) { |
680 | mlog_errno(ret); | |
85db90e7 | 681 | goto out; |
f56654c4 TM |
682 | } |
683 | ||
78f30c31 | 684 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); |
f56654c4 TM |
685 | if (ret) |
686 | mlog_errno(ret); | |
687 | ||
f56654c4 | 688 | out: |
f56654c4 TM |
689 | return ret; |
690 | } | |
691 | ||
692 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
693 | u32 old_clusters, | |
694 | u32 new_clusters, | |
19b801f4 | 695 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 696 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
697 | { |
698 | int ret = 0; | |
699 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
700 | u64 block; | |
f56654c4 TM |
701 | |
702 | if (old_clusters <= new_clusters) | |
703 | return 0; | |
704 | ||
705 | cpos = new_clusters; | |
706 | trunc_len = old_clusters - new_clusters; | |
707 | while (trunc_len) { | |
708 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 709 | &alloc_size, |
19b801f4 | 710 | &vb->vb_xv->xr_list); |
f56654c4 TM |
711 | if (ret) { |
712 | mlog_errno(ret); | |
713 | goto out; | |
714 | } | |
715 | ||
716 | if (alloc_size > trunc_len) | |
717 | alloc_size = trunc_len; | |
718 | ||
19b801f4 | 719 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 720 | phys_cpos, alloc_size, |
78f30c31 | 721 | ctxt); |
f56654c4 TM |
722 | if (ret) { |
723 | mlog_errno(ret); | |
724 | goto out; | |
725 | } | |
726 | ||
727 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
728 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
729 | block, alloc_size); | |
f56654c4 TM |
730 | cpos += alloc_size; |
731 | trunc_len -= alloc_size; | |
732 | } | |
733 | ||
734 | out: | |
f56654c4 TM |
735 | return ret; |
736 | } | |
737 | ||
738 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 739 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
740 | int len, |
741 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
742 | { |
743 | int ret; | |
744 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 745 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
746 | |
747 | if (new_clusters == old_clusters) | |
748 | return 0; | |
749 | ||
750 | if (new_clusters > old_clusters) | |
751 | ret = ocfs2_xattr_extend_allocation(inode, | |
752 | new_clusters - old_clusters, | |
b3e5d379 | 753 | vb, ctxt); |
f56654c4 TM |
754 | else |
755 | ret = ocfs2_xattr_shrink_size(inode, | |
756 | old_clusters, new_clusters, | |
b3e5d379 | 757 | vb, ctxt); |
f56654c4 TM |
758 | |
759 | return ret; | |
760 | } | |
cf1d6c76 | 761 | |
936b8834 TM |
762 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
763 | size_t *result, const char *prefix, | |
764 | const char *name, int name_len) | |
765 | { | |
766 | char *p = buffer + *result; | |
767 | int prefix_len = strlen(prefix); | |
768 | int total_len = prefix_len + name_len + 1; | |
769 | ||
770 | *result += total_len; | |
771 | ||
772 | /* we are just looking for how big our buffer needs to be */ | |
773 | if (!size) | |
774 | return 0; | |
775 | ||
776 | if (*result > size) | |
777 | return -ERANGE; | |
778 | ||
779 | memcpy(p, prefix, prefix_len); | |
780 | memcpy(p + prefix_len, name, name_len); | |
781 | p[prefix_len + name_len] = '\0'; | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
cf1d6c76 TY |
786 | static int ocfs2_xattr_list_entries(struct inode *inode, |
787 | struct ocfs2_xattr_header *header, | |
788 | char *buffer, size_t buffer_size) | |
789 | { | |
936b8834 TM |
790 | size_t result = 0; |
791 | int i, type, ret; | |
792 | const char *prefix, *name; | |
cf1d6c76 TY |
793 | |
794 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
795 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
796 | type = ocfs2_xattr_get_type(entry); |
797 | prefix = ocfs2_xattr_prefix(type); | |
798 | ||
799 | if (prefix) { | |
800 | name = (const char *)header + | |
801 | le16_to_cpu(entry->xe_name_offset); | |
802 | ||
803 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
804 | &result, prefix, name, | |
805 | entry->xe_name_len); | |
806 | if (ret) | |
807 | return ret; | |
cf1d6c76 TY |
808 | } |
809 | } | |
810 | ||
936b8834 | 811 | return result; |
cf1d6c76 TY |
812 | } |
813 | ||
814 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
815 | struct ocfs2_dinode *di, | |
816 | char *buffer, | |
817 | size_t buffer_size) | |
818 | { | |
819 | struct ocfs2_xattr_header *header = NULL; | |
820 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
821 | int ret = 0; | |
822 | ||
823 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
824 | return ret; | |
825 | ||
826 | header = (struct ocfs2_xattr_header *) | |
827 | ((void *)di + inode->i_sb->s_blocksize - | |
828 | le16_to_cpu(di->i_xattr_inline_size)); | |
829 | ||
830 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
831 | ||
832 | return ret; | |
833 | } | |
834 | ||
835 | static int ocfs2_xattr_block_list(struct inode *inode, | |
836 | struct ocfs2_dinode *di, | |
837 | char *buffer, | |
838 | size_t buffer_size) | |
839 | { | |
840 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 841 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
842 | int ret = 0; |
843 | ||
844 | if (!di->i_xattr_loc) | |
845 | return ret; | |
846 | ||
4ae1d69b JB |
847 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
848 | &blk_bh); | |
cf1d6c76 TY |
849 | if (ret < 0) { |
850 | mlog_errno(ret); | |
851 | return ret; | |
852 | } | |
cf1d6c76 | 853 | |
0c044f0b | 854 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
855 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
856 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
857 | ret = ocfs2_xattr_list_entries(inode, header, | |
858 | buffer, buffer_size); | |
859 | } else { | |
860 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
861 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
862 | buffer, buffer_size); | |
863 | } | |
4ae1d69b | 864 | |
cf1d6c76 TY |
865 | brelse(blk_bh); |
866 | ||
867 | return ret; | |
868 | } | |
869 | ||
870 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
871 | char *buffer, | |
872 | size_t size) | |
873 | { | |
874 | int ret = 0, i_ret = 0, b_ret = 0; | |
875 | struct buffer_head *di_bh = NULL; | |
876 | struct ocfs2_dinode *di = NULL; | |
877 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
878 | ||
8154da3d TY |
879 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
880 | return -EOPNOTSUPP; | |
881 | ||
cf1d6c76 TY |
882 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
883 | return ret; | |
884 | ||
885 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
886 | if (ret < 0) { | |
887 | mlog_errno(ret); | |
888 | return ret; | |
889 | } | |
890 | ||
891 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
892 | ||
893 | down_read(&oi->ip_xattr_sem); | |
894 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
895 | if (i_ret < 0) | |
896 | b_ret = 0; | |
897 | else { | |
898 | if (buffer) { | |
899 | buffer += i_ret; | |
900 | size -= i_ret; | |
901 | } | |
902 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
903 | buffer, size); | |
904 | if (b_ret < 0) | |
905 | i_ret = 0; | |
906 | } | |
907 | up_read(&oi->ip_xattr_sem); | |
908 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
909 | ||
910 | brelse(di_bh); | |
911 | ||
912 | return i_ret + b_ret; | |
913 | } | |
914 | ||
915 | static int ocfs2_xattr_find_entry(int name_index, | |
916 | const char *name, | |
917 | struct ocfs2_xattr_search *xs) | |
918 | { | |
919 | struct ocfs2_xattr_entry *entry; | |
920 | size_t name_len; | |
921 | int i, cmp = 1; | |
922 | ||
923 | if (name == NULL) | |
924 | return -EINVAL; | |
925 | ||
926 | name_len = strlen(name); | |
927 | entry = xs->here; | |
928 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
929 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
930 | if (!cmp) | |
931 | cmp = name_len - entry->xe_name_len; | |
932 | if (!cmp) | |
933 | cmp = memcmp(name, (xs->base + | |
934 | le16_to_cpu(entry->xe_name_offset)), | |
935 | name_len); | |
936 | if (cmp == 0) | |
937 | break; | |
938 | entry += 1; | |
939 | } | |
940 | xs->here = entry; | |
941 | ||
942 | return cmp ? -ENODATA : 0; | |
943 | } | |
944 | ||
945 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 946 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
947 | void *buffer, |
948 | size_t len) | |
949 | { | |
950 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
951 | u64 blkno; | |
952 | int i, ret = 0; | |
953 | size_t cplen, blocksize; | |
954 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
955 | struct ocfs2_extent_list *el; |
956 | ||
cf1d6c76 TY |
957 | el = &xv->xr_list; |
958 | clusters = le32_to_cpu(xv->xr_clusters); | |
959 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
960 | blocksize = inode->i_sb->s_blocksize; | |
961 | ||
962 | cpos = 0; | |
963 | while (cpos < clusters) { | |
964 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
965 | &num_clusters, el); | |
966 | if (ret) { | |
967 | mlog_errno(ret); | |
968 | goto out; | |
969 | } | |
970 | ||
971 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
972 | /* Copy ocfs2_xattr_value */ | |
973 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
974 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
975 | &bh, NULL); | |
cf1d6c76 TY |
976 | if (ret) { |
977 | mlog_errno(ret); | |
978 | goto out; | |
979 | } | |
980 | ||
981 | cplen = len >= blocksize ? blocksize : len; | |
982 | memcpy(buffer, bh->b_data, cplen); | |
983 | len -= cplen; | |
984 | buffer += cplen; | |
985 | ||
986 | brelse(bh); | |
987 | bh = NULL; | |
988 | if (len == 0) | |
989 | break; | |
990 | } | |
991 | cpos += num_clusters; | |
992 | } | |
993 | out: | |
994 | return ret; | |
995 | } | |
996 | ||
997 | static int ocfs2_xattr_ibody_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 | { | |
1004 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1005 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1006 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1007 | size_t size; |
1008 | int ret = 0; | |
1009 | ||
1010 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1011 | return -ENODATA; | |
1012 | ||
1013 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1014 | xs->header = (struct ocfs2_xattr_header *) | |
1015 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1016 | xs->base = (void *)xs->header; | |
1017 | xs->here = xs->header->xh_entries; | |
1018 | ||
1019 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1020 | if (ret) | |
1021 | return ret; | |
1022 | size = le64_to_cpu(xs->here->xe_value_size); | |
1023 | if (buffer) { | |
1024 | if (size > buffer_size) | |
1025 | return -ERANGE; | |
1026 | if (ocfs2_xattr_is_local(xs->here)) { | |
1027 | memcpy(buffer, (void *)xs->base + | |
1028 | le16_to_cpu(xs->here->xe_name_offset) + | |
1029 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1030 | } else { | |
589dc260 TM |
1031 | xv = (struct ocfs2_xattr_value_root *) |
1032 | (xs->base + le16_to_cpu( | |
1033 | xs->here->xe_name_offset) + | |
1034 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1035 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1036 | buffer, size); |
1037 | if (ret < 0) { | |
1038 | mlog_errno(ret); | |
1039 | return ret; | |
1040 | } | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | return size; | |
1045 | } | |
1046 | ||
1047 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1048 | int name_index, | |
1049 | const char *name, | |
1050 | void *buffer, | |
1051 | size_t buffer_size, | |
1052 | struct ocfs2_xattr_search *xs) | |
1053 | { | |
cf1d6c76 | 1054 | struct ocfs2_xattr_block *xb; |
589dc260 | 1055 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1056 | size_t size; |
44d8e4e1 SM |
1057 | int ret = -ENODATA, name_offset, name_len, i; |
1058 | int uninitialized_var(block_off); | |
cf1d6c76 | 1059 | |
ba937127 JB |
1060 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1061 | if (!xs->bucket) { | |
1062 | ret = -ENOMEM; | |
1063 | mlog_errno(ret); | |
1064 | goto cleanup; | |
1065 | } | |
589dc260 | 1066 | |
54f443f4 JB |
1067 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1068 | if (ret) { | |
cf1d6c76 | 1069 | mlog_errno(ret); |
cf1d6c76 TY |
1070 | goto cleanup; |
1071 | } | |
1072 | ||
6c1e183e TY |
1073 | if (xs->not_found) { |
1074 | ret = -ENODATA; | |
1075 | goto cleanup; | |
1076 | } | |
1077 | ||
54f443f4 | 1078 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1079 | size = le64_to_cpu(xs->here->xe_value_size); |
1080 | if (buffer) { | |
1081 | ret = -ERANGE; | |
1082 | if (size > buffer_size) | |
1083 | goto cleanup; | |
589dc260 TM |
1084 | |
1085 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1086 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1087 | i = xs->here - xs->header->xh_entries; | |
1088 | ||
1089 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
1090 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 1091 | bucket_xh(xs->bucket), |
589dc260 TM |
1092 | i, |
1093 | &block_off, | |
1094 | &name_offset); | |
ba937127 | 1095 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1096 | } |
cf1d6c76 TY |
1097 | if (ocfs2_xattr_is_local(xs->here)) { |
1098 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1099 | name_offset + name_len, size); |
cf1d6c76 | 1100 | } else { |
589dc260 TM |
1101 | xv = (struct ocfs2_xattr_value_root *) |
1102 | (xs->base + name_offset + name_len); | |
1103 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1104 | buffer, size); |
1105 | if (ret < 0) { | |
1106 | mlog_errno(ret); | |
1107 | goto cleanup; | |
1108 | } | |
1109 | } | |
1110 | } | |
1111 | ret = size; | |
1112 | cleanup: | |
ba937127 | 1113 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1114 | |
54f443f4 JB |
1115 | brelse(xs->xattr_bh); |
1116 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1117 | return ret; |
1118 | } | |
1119 | ||
4e3e9d02 TY |
1120 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1121 | struct buffer_head *di_bh, | |
0030e001 TY |
1122 | int name_index, |
1123 | const char *name, | |
1124 | void *buffer, | |
1125 | size_t buffer_size) | |
cf1d6c76 TY |
1126 | { |
1127 | int ret; | |
1128 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1129 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1130 | struct ocfs2_xattr_search xis = { | |
1131 | .not_found = -ENODATA, | |
1132 | }; | |
1133 | struct ocfs2_xattr_search xbs = { | |
1134 | .not_found = -ENODATA, | |
1135 | }; | |
1136 | ||
8154da3d TY |
1137 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1138 | return -EOPNOTSUPP; | |
1139 | ||
cf1d6c76 TY |
1140 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1141 | ret = -ENODATA; | |
1142 | ||
cf1d6c76 TY |
1143 | xis.inode_bh = xbs.inode_bh = di_bh; |
1144 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1145 | ||
1146 | down_read(&oi->ip_xattr_sem); | |
1147 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1148 | buffer_size, &xis); | |
6c1e183e | 1149 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1150 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1151 | buffer_size, &xbs); | |
1152 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1153 | |
1154 | return ret; | |
1155 | } | |
1156 | ||
1157 | /* ocfs2_xattr_get() | |
1158 | * | |
1159 | * Copy an extended attribute into the buffer provided. | |
1160 | * Buffer is NULL to compute the size of buffer required. | |
1161 | */ | |
1162 | static int ocfs2_xattr_get(struct inode *inode, | |
1163 | int name_index, | |
1164 | const char *name, | |
1165 | void *buffer, | |
1166 | size_t buffer_size) | |
1167 | { | |
1168 | int ret; | |
1169 | struct buffer_head *di_bh = NULL; | |
1170 | ||
1171 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1172 | if (ret < 0) { | |
1173 | mlog_errno(ret); | |
1174 | return ret; | |
1175 | } | |
1176 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1177 | name, buffer, buffer_size); | |
1178 | ||
cf1d6c76 TY |
1179 | ocfs2_inode_unlock(inode, 0); |
1180 | ||
1181 | brelse(di_bh); | |
1182 | ||
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1187 | handle_t *handle, |
cf1d6c76 TY |
1188 | struct ocfs2_xattr_value_root *xv, |
1189 | const void *value, | |
1190 | int value_len) | |
1191 | { | |
71d548a6 | 1192 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1193 | u16 blocksize = inode->i_sb->s_blocksize; |
1194 | u32 p_cluster, num_clusters; | |
1195 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1196 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1197 | u64 blkno; | |
1198 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1199 | |
1200 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1201 | ||
cf1d6c76 TY |
1202 | while (cpos < clusters) { |
1203 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1204 | &num_clusters, &xv->xr_list); | |
1205 | if (ret) { | |
1206 | mlog_errno(ret); | |
85db90e7 | 1207 | goto out; |
cf1d6c76 TY |
1208 | } |
1209 | ||
1210 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1211 | ||
1212 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1213 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1214 | &bh, NULL); | |
cf1d6c76 TY |
1215 | if (ret) { |
1216 | mlog_errno(ret); | |
85db90e7 | 1217 | goto out; |
cf1d6c76 TY |
1218 | } |
1219 | ||
1220 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1221 | INODE_CACHE(inode), |
cf1d6c76 TY |
1222 | bh, |
1223 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1224 | if (ret < 0) { | |
1225 | mlog_errno(ret); | |
85db90e7 | 1226 | goto out; |
cf1d6c76 TY |
1227 | } |
1228 | ||
1229 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1230 | memcpy(bh->b_data, value, cp_len); | |
1231 | value_len -= cp_len; | |
1232 | value += cp_len; | |
1233 | if (cp_len < blocksize) | |
1234 | memset(bh->b_data + cp_len, 0, | |
1235 | blocksize - cp_len); | |
1236 | ||
1237 | ret = ocfs2_journal_dirty(handle, bh); | |
1238 | if (ret < 0) { | |
1239 | mlog_errno(ret); | |
85db90e7 | 1240 | goto out; |
cf1d6c76 TY |
1241 | } |
1242 | brelse(bh); | |
1243 | bh = NULL; | |
1244 | ||
1245 | /* | |
1246 | * XXX: do we need to empty all the following | |
1247 | * blocks in this cluster? | |
1248 | */ | |
1249 | if (!value_len) | |
1250 | break; | |
1251 | } | |
1252 | cpos += num_clusters; | |
1253 | } | |
cf1d6c76 TY |
1254 | out: |
1255 | brelse(bh); | |
1256 | ||
1257 | return ret; | |
1258 | } | |
1259 | ||
1260 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1261 | handle_t *handle, |
cf1d6c76 TY |
1262 | struct ocfs2_xattr_info *xi, |
1263 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1264 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1265 | size_t offs) |
1266 | { | |
cf1d6c76 TY |
1267 | int ret = 0; |
1268 | size_t name_len = strlen(xi->name); | |
1269 | void *val = xs->base + offs; | |
1270 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1271 | ||
0cf2f763 | 1272 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
512620f4 | 1273 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1274 | if (ret) { |
1275 | mlog_errno(ret); | |
85db90e7 | 1276 | goto out; |
cf1d6c76 TY |
1277 | } |
1278 | /* Decrease xattr count */ | |
1279 | le16_add_cpu(&xs->header->xh_count, -1); | |
1280 | /* Remove the xattr entry and tree root which has already be set*/ | |
1281 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1282 | memset(val, 0, size); | |
1283 | ||
512620f4 | 1284 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1285 | if (ret < 0) |
1286 | mlog_errno(ret); | |
cf1d6c76 TY |
1287 | out: |
1288 | return ret; | |
1289 | } | |
1290 | ||
1291 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1292 | handle_t *handle, |
cf1d6c76 TY |
1293 | struct ocfs2_xattr_info *xi, |
1294 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1295 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1296 | size_t offs) |
1297 | { | |
85db90e7 | 1298 | int ret; |
cf1d6c76 | 1299 | |
0cf2f763 | 1300 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
0c748e95 | 1301 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1302 | if (ret) { |
1303 | mlog_errno(ret); | |
85db90e7 | 1304 | goto out; |
cf1d6c76 TY |
1305 | } |
1306 | ||
1307 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1308 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1309 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1310 | ocfs2_xattr_set_local(xs->here, 1); | |
1311 | else | |
1312 | ocfs2_xattr_set_local(xs->here, 0); | |
1313 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1314 | ||
0c748e95 | 1315 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1316 | if (ret < 0) |
1317 | mlog_errno(ret); | |
cf1d6c76 TY |
1318 | out: |
1319 | return ret; | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * ocfs2_xattr_set_value_outside() | |
1324 | * | |
1325 | * Set large size value in B tree. | |
1326 | */ | |
1327 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1328 | struct ocfs2_xattr_info *xi, | |
1329 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1330 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1331 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1332 | size_t offs) |
1333 | { | |
1334 | size_t name_len = strlen(xi->name); | |
1335 | void *val = xs->base + offs; | |
1336 | struct ocfs2_xattr_value_root *xv = NULL; | |
1337 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1338 | int ret = 0; | |
1339 | ||
1340 | memset(val, 0, size); | |
1341 | memcpy(val, xi->name, name_len); | |
1342 | xv = (struct ocfs2_xattr_value_root *) | |
1343 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1344 | xv->xr_clusters = 0; | |
1345 | xv->xr_last_eb_blk = 0; | |
1346 | xv->xr_list.l_tree_depth = 0; | |
1347 | xv->xr_list.l_count = cpu_to_le16(1); | |
1348 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1349 | vb->vb_xv = xv; |
cf1d6c76 | 1350 | |
512620f4 | 1351 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt); |
cf1d6c76 TY |
1352 | if (ret < 0) { |
1353 | mlog_errno(ret); | |
1354 | return ret; | |
1355 | } | |
512620f4 | 1356 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1357 | if (ret < 0) { |
1358 | mlog_errno(ret); | |
1359 | return ret; | |
1360 | } | |
512620f4 | 1361 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb->vb_xv, |
85db90e7 | 1362 | xi->value, xi->value_len); |
cf1d6c76 TY |
1363 | if (ret < 0) |
1364 | mlog_errno(ret); | |
1365 | ||
1366 | return ret; | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * ocfs2_xattr_set_entry_local() | |
1371 | * | |
1372 | * Set, replace or remove extended attribute in local. | |
1373 | */ | |
1374 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1375 | struct ocfs2_xattr_info *xi, | |
1376 | struct ocfs2_xattr_search *xs, | |
1377 | struct ocfs2_xattr_entry *last, | |
1378 | size_t min_offs) | |
1379 | { | |
1380 | size_t name_len = strlen(xi->name); | |
1381 | int i; | |
1382 | ||
1383 | if (xi->value && xs->not_found) { | |
1384 | /* Insert the new xattr entry. */ | |
1385 | le16_add_cpu(&xs->header->xh_count, 1); | |
1386 | ocfs2_xattr_set_type(last, xi->name_index); | |
1387 | ocfs2_xattr_set_local(last, 1); | |
1388 | last->xe_name_len = name_len; | |
1389 | } else { | |
1390 | void *first_val; | |
1391 | void *val; | |
1392 | size_t offs, size; | |
1393 | ||
1394 | first_val = xs->base + min_offs; | |
1395 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1396 | val = xs->base + offs; | |
1397 | ||
1398 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1399 | OCFS2_XATTR_INLINE_SIZE) | |
1400 | size = OCFS2_XATTR_SIZE(name_len) + | |
1401 | OCFS2_XATTR_ROOT_SIZE; | |
1402 | else | |
1403 | size = OCFS2_XATTR_SIZE(name_len) + | |
1404 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1405 | ||
1406 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1407 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1408 | /* The old and the new value have the | |
1409 | same size. Just replace the value. */ | |
1410 | ocfs2_xattr_set_local(xs->here, 1); | |
1411 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1412 | /* Clear value bytes. */ | |
1413 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1414 | 0, | |
1415 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1416 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1417 | xi->value, | |
1418 | xi->value_len); | |
1419 | return; | |
1420 | } | |
1421 | /* Remove the old name+value. */ | |
1422 | memmove(first_val + size, first_val, val - first_val); | |
1423 | memset(first_val, 0, size); | |
1424 | xs->here->xe_name_hash = 0; | |
1425 | xs->here->xe_name_offset = 0; | |
1426 | ocfs2_xattr_set_local(xs->here, 1); | |
1427 | xs->here->xe_value_size = 0; | |
1428 | ||
1429 | min_offs += size; | |
1430 | ||
1431 | /* Adjust all value offsets. */ | |
1432 | last = xs->header->xh_entries; | |
1433 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1434 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1435 | ||
1436 | if (o < offs) | |
1437 | last->xe_name_offset = cpu_to_le16(o + size); | |
1438 | last += 1; | |
1439 | } | |
1440 | ||
1441 | if (!xi->value) { | |
1442 | /* Remove the old entry. */ | |
1443 | last -= 1; | |
1444 | memmove(xs->here, xs->here + 1, | |
1445 | (void *)last - (void *)xs->here); | |
1446 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1447 | le16_add_cpu(&xs->header->xh_count, -1); | |
1448 | } | |
1449 | } | |
1450 | if (xi->value) { | |
1451 | /* Insert the new name+value. */ | |
1452 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1453 | OCFS2_XATTR_SIZE(xi->value_len); | |
1454 | void *val = xs->base + min_offs - size; | |
1455 | ||
1456 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1457 | memset(val, 0, size); | |
1458 | memcpy(val, xi->name, name_len); | |
1459 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1460 | xi->value, | |
1461 | xi->value_len); | |
1462 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1463 | ocfs2_xattr_set_local(xs->here, 1); | |
1464 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1465 | } | |
1466 | ||
1467 | return; | |
1468 | } | |
1469 | ||
1470 | /* | |
1471 | * ocfs2_xattr_set_entry() | |
1472 | * | |
1473 | * Set extended attribute entry into inode or block. | |
1474 | * | |
1475 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1476 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1477 | * then set value in B tree with set_value_outside(). | |
1478 | */ | |
1479 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1480 | struct ocfs2_xattr_info *xi, | |
1481 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1482 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1483 | int flag) |
1484 | { | |
1485 | struct ocfs2_xattr_entry *last; | |
1486 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1487 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1488 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1489 | size_t size_l = 0; | |
85db90e7 | 1490 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1491 | int free, i, ret; |
1492 | struct ocfs2_xattr_info xi_l = { | |
1493 | .name_index = xi->name_index, | |
1494 | .name = xi->name, | |
1495 | .value = xi->value, | |
1496 | .value_len = xi->value_len, | |
1497 | }; | |
512620f4 JB |
1498 | struct ocfs2_xattr_value_buf vb = { |
1499 | .vb_bh = xs->xattr_bh, | |
1500 | .vb_access = ocfs2_journal_access_di, | |
1501 | }; | |
1502 | ||
1503 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1504 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1505 | vb.vb_access = ocfs2_journal_access_xb; | |
1506 | } else | |
1507 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1508 | |
1509 | /* Compute min_offs, last and free space. */ | |
1510 | last = xs->header->xh_entries; | |
1511 | ||
1512 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1513 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1514 | if (offs < min_offs) | |
1515 | min_offs = offs; | |
1516 | last += 1; | |
1517 | } | |
1518 | ||
4442f518 | 1519 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1520 | if (free < 0) |
b37c4d84 | 1521 | return -EIO; |
cf1d6c76 TY |
1522 | |
1523 | if (!xs->not_found) { | |
1524 | size_t size = 0; | |
1525 | if (ocfs2_xattr_is_local(xs->here)) | |
1526 | size = OCFS2_XATTR_SIZE(name_len) + | |
1527 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1528 | else | |
1529 | size = OCFS2_XATTR_SIZE(name_len) + | |
1530 | OCFS2_XATTR_ROOT_SIZE; | |
1531 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1532 | } | |
1533 | /* Check free space in inode or block */ | |
1534 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1535 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1536 | OCFS2_XATTR_SIZE(name_len) + | |
1537 | OCFS2_XATTR_ROOT_SIZE) { | |
1538 | ret = -ENOSPC; | |
1539 | goto out; | |
1540 | } | |
1541 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1542 | xi_l.value = (void *)&def_xv; | |
1543 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1544 | } else if (xi->value) { | |
1545 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1546 | OCFS2_XATTR_SIZE(name_len) + | |
1547 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1548 | ret = -ENOSPC; | |
1549 | goto out; | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | if (!xs->not_found) { | |
1554 | /* For existing extended attribute */ | |
1555 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1556 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1557 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1558 | void *val = xs->base + offs; | |
1559 | ||
1560 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1561 | /* Replace existing local xattr with tree root */ | |
1562 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1563 | ctxt, &vb, offs); |
cf1d6c76 TY |
1564 | if (ret < 0) |
1565 | mlog_errno(ret); | |
1566 | goto out; | |
1567 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1568 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1569 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1570 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 TY |
1571 | |
1572 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1573 | /* | |
1574 | * If new value need set outside also, | |
1575 | * first truncate old value to new value, | |
1576 | * then set new value with set_value_outside(). | |
1577 | */ | |
1578 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1579 | &vb, |
78f30c31 TM |
1580 | xi->value_len, |
1581 | ctxt); | |
cf1d6c76 TY |
1582 | if (ret < 0) { |
1583 | mlog_errno(ret); | |
1584 | goto out; | |
1585 | } | |
1586 | ||
85db90e7 TM |
1587 | ret = ocfs2_xattr_update_entry(inode, |
1588 | handle, | |
1589 | xi, | |
1590 | xs, | |
0c748e95 | 1591 | &vb, |
85db90e7 | 1592 | offs); |
cf1d6c76 TY |
1593 | if (ret < 0) { |
1594 | mlog_errno(ret); | |
1595 | goto out; | |
1596 | } | |
1597 | ||
85db90e7 TM |
1598 | ret = __ocfs2_xattr_set_value_outside(inode, |
1599 | handle, | |
b3e5d379 | 1600 | vb.vb_xv, |
85db90e7 TM |
1601 | xi->value, |
1602 | xi->value_len); | |
cf1d6c76 TY |
1603 | if (ret < 0) |
1604 | mlog_errno(ret); | |
1605 | goto out; | |
1606 | } else { | |
1607 | /* | |
1608 | * If new value need set in local, | |
1609 | * just trucate old value to zero. | |
1610 | */ | |
1611 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1612 | &vb, |
85db90e7 TM |
1613 | 0, |
1614 | ctxt); | |
cf1d6c76 TY |
1615 | if (ret < 0) |
1616 | mlog_errno(ret); | |
1617 | } | |
1618 | } | |
1619 | } | |
1620 | ||
0cf2f763 | 1621 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh, |
512620f4 | 1622 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1623 | if (ret) { |
1624 | mlog_errno(ret); | |
85db90e7 | 1625 | goto out; |
cf1d6c76 TY |
1626 | } |
1627 | ||
1628 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
0cf2f763 | 1629 | ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh, |
512620f4 | 1630 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1631 | if (ret) { |
1632 | mlog_errno(ret); | |
85db90e7 | 1633 | goto out; |
cf1d6c76 TY |
1634 | } |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * Set value in local, include set tree root in local. | |
1639 | * This is the first step for value size >INLINE_SIZE. | |
1640 | */ | |
1641 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1642 | ||
1643 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1644 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1645 | if (ret < 0) { | |
1646 | mlog_errno(ret); | |
85db90e7 | 1647 | goto out; |
cf1d6c76 TY |
1648 | } |
1649 | } | |
1650 | ||
1651 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1652 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1653 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1654 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1655 | ||
1656 | /* | |
1657 | * Adjust extent record count or inline data size | |
1658 | * to reserve space for extended attribute. | |
1659 | */ | |
1660 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1661 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1662 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1663 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1664 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1665 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1666 | sizeof(struct ocfs2_extent_rec))); | |
1667 | } | |
1668 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1669 | } | |
1670 | /* Update xattr flag */ | |
1671 | spin_lock(&oi->ip_lock); | |
1672 | oi->ip_dyn_features |= flag; | |
1673 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1674 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1675 | |
1676 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1677 | if (ret < 0) | |
1678 | mlog_errno(ret); | |
1679 | ||
cf1d6c76 TY |
1680 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1681 | /* | |
1682 | * Set value outside in B tree. | |
1683 | * This is the second step for value size > INLINE_SIZE. | |
1684 | */ | |
1685 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1686 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1687 | &vb, offs); | |
cf1d6c76 TY |
1688 | if (ret < 0) { |
1689 | int ret2; | |
1690 | ||
1691 | mlog_errno(ret); | |
1692 | /* | |
1693 | * If set value outside failed, we have to clean | |
1694 | * the junk tree root we have already set in local. | |
1695 | */ | |
85db90e7 | 1696 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1697 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1698 | if (ret2 < 0) |
1699 | mlog_errno(ret2); | |
1700 | } | |
1701 | } | |
1702 | out: | |
1703 | return ret; | |
cf1d6c76 TY |
1704 | } |
1705 | ||
cf1d6c76 | 1706 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 1707 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1708 | struct ocfs2_xattr_header *header) |
1709 | { | |
1710 | int ret = 0, i; | |
78f30c31 TM |
1711 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1712 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
1713 | ||
1714 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 | 1715 | |
a90714c1 JK |
1716 | ctxt.handle = ocfs2_start_trans(osb, |
1717 | ocfs2_remove_extent_credits(osb->sb)); | |
85db90e7 TM |
1718 | if (IS_ERR(ctxt.handle)) { |
1719 | ret = PTR_ERR(ctxt.handle); | |
1720 | mlog_errno(ret); | |
1721 | goto out; | |
1722 | } | |
1723 | ||
cf1d6c76 TY |
1724 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
1725 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1726 | ||
1727 | if (!ocfs2_xattr_is_local(entry)) { | |
cf1d6c76 TY |
1728 | void *val; |
1729 | ||
1730 | val = (void *)header + | |
1731 | le16_to_cpu(entry->xe_name_offset); | |
4311901d | 1732 | vb->vb_xv = (struct ocfs2_xattr_value_root *) |
cf1d6c76 | 1733 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); |
4311901d | 1734 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); |
cf1d6c76 TY |
1735 | if (ret < 0) { |
1736 | mlog_errno(ret); | |
78f30c31 | 1737 | break; |
cf1d6c76 TY |
1738 | } |
1739 | } | |
1740 | } | |
1741 | ||
85db90e7 | 1742 | ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
1743 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1744 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 1745 | out: |
cf1d6c76 TY |
1746 | return ret; |
1747 | } | |
1748 | ||
1749 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1750 | struct buffer_head *di_bh) | |
1751 | { | |
1752 | ||
1753 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1754 | struct ocfs2_xattr_header *header; | |
1755 | int ret; | |
4311901d JB |
1756 | struct ocfs2_xattr_value_buf vb = { |
1757 | .vb_bh = di_bh, | |
1758 | .vb_access = ocfs2_journal_access_di, | |
1759 | }; | |
cf1d6c76 TY |
1760 | |
1761 | header = (struct ocfs2_xattr_header *) | |
1762 | ((void *)di + inode->i_sb->s_blocksize - | |
1763 | le16_to_cpu(di->i_xattr_inline_size)); | |
1764 | ||
4311901d | 1765 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
cf1d6c76 TY |
1766 | |
1767 | return ret; | |
1768 | } | |
1769 | ||
1770 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1771 | struct buffer_head *blk_bh) | |
1772 | { | |
1773 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 1774 | int ret = 0; |
4311901d JB |
1775 | struct ocfs2_xattr_value_buf vb = { |
1776 | .vb_bh = blk_bh, | |
1777 | .vb_access = ocfs2_journal_access_xb, | |
1778 | }; | |
cf1d6c76 TY |
1779 | |
1780 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1781 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1782 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
4311901d | 1783 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
a3944256 TM |
1784 | } else |
1785 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1786 | |
1787 | return ret; | |
1788 | } | |
1789 | ||
08413899 TM |
1790 | static int ocfs2_xattr_free_block(struct inode *inode, |
1791 | u64 block) | |
1792 | { | |
1793 | struct inode *xb_alloc_inode; | |
1794 | struct buffer_head *xb_alloc_bh = NULL; | |
1795 | struct buffer_head *blk_bh = NULL; | |
1796 | struct ocfs2_xattr_block *xb; | |
1797 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1798 | handle_t *handle; | |
1799 | int ret = 0; | |
1800 | u64 blk, bg_blkno; | |
1801 | u16 bit; | |
1802 | ||
4ae1d69b | 1803 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1804 | if (ret < 0) { |
1805 | mlog_errno(ret); | |
1806 | goto out; | |
1807 | } | |
1808 | ||
08413899 TM |
1809 | ret = ocfs2_xattr_block_remove(inode, blk_bh); |
1810 | if (ret < 0) { | |
1811 | mlog_errno(ret); | |
1812 | goto out; | |
1813 | } | |
1814 | ||
4ae1d69b | 1815 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1816 | blk = le64_to_cpu(xb->xb_blkno); |
1817 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1818 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1819 | ||
1820 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1821 | EXTENT_ALLOC_SYSTEM_INODE, | |
1822 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1823 | if (!xb_alloc_inode) { | |
1824 | ret = -ENOMEM; | |
1825 | mlog_errno(ret); | |
1826 | goto out; | |
1827 | } | |
1828 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1829 | ||
1830 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1831 | if (ret < 0) { | |
1832 | mlog_errno(ret); | |
1833 | goto out_mutex; | |
1834 | } | |
1835 | ||
1836 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1837 | if (IS_ERR(handle)) { | |
1838 | ret = PTR_ERR(handle); | |
1839 | mlog_errno(ret); | |
1840 | goto out_unlock; | |
1841 | } | |
1842 | ||
1843 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1844 | bit, bg_blkno, 1); | |
1845 | if (ret < 0) | |
1846 | mlog_errno(ret); | |
1847 | ||
1848 | ocfs2_commit_trans(osb, handle); | |
1849 | out_unlock: | |
1850 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1851 | brelse(xb_alloc_bh); | |
1852 | out_mutex: | |
1853 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1854 | iput(xb_alloc_inode); | |
1855 | out: | |
1856 | brelse(blk_bh); | |
1857 | return ret; | |
1858 | } | |
1859 | ||
cf1d6c76 TY |
1860 | /* |
1861 | * ocfs2_xattr_remove() | |
1862 | * | |
1863 | * Free extended attribute resources associated with this inode. | |
1864 | */ | |
1865 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1866 | { | |
cf1d6c76 TY |
1867 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1868 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1869 | handle_t *handle; | |
1870 | int ret; | |
1871 | ||
8154da3d TY |
1872 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1873 | return 0; | |
1874 | ||
cf1d6c76 TY |
1875 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1876 | return 0; | |
1877 | ||
1878 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1879 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1880 | if (ret < 0) { | |
1881 | mlog_errno(ret); | |
1882 | goto out; | |
1883 | } | |
1884 | } | |
cf1d6c76 | 1885 | |
08413899 TM |
1886 | if (di->i_xattr_loc) { |
1887 | ret = ocfs2_xattr_free_block(inode, | |
1888 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1889 | if (ret < 0) { |
1890 | mlog_errno(ret); | |
1891 | goto out; | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1896 | OCFS2_INODE_UPDATE_CREDITS); | |
1897 | if (IS_ERR(handle)) { | |
1898 | ret = PTR_ERR(handle); | |
1899 | mlog_errno(ret); | |
1900 | goto out; | |
1901 | } | |
0cf2f763 | 1902 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 1903 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1904 | if (ret) { |
1905 | mlog_errno(ret); | |
1906 | goto out_commit; | |
1907 | } | |
1908 | ||
08413899 | 1909 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1910 | |
1911 | spin_lock(&oi->ip_lock); | |
1912 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1913 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1914 | spin_unlock(&oi->ip_lock); | |
1915 | ||
1916 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1917 | if (ret < 0) | |
1918 | mlog_errno(ret); | |
1919 | out_commit: | |
1920 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1921 | out: | |
cf1d6c76 TY |
1922 | return ret; |
1923 | } | |
1924 | ||
1925 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1926 | struct ocfs2_dinode *di) | |
1927 | { | |
1928 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1929 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1930 | int free; | |
1931 | ||
1932 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1933 | return 0; | |
1934 | ||
1935 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1936 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1937 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1938 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1939 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1940 | le64_to_cpu(di->i_size); | |
1941 | } else { | |
1942 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1943 | free = (le16_to_cpu(el->l_count) - | |
1944 | le16_to_cpu(el->l_next_free_rec)) * | |
1945 | sizeof(struct ocfs2_extent_rec); | |
1946 | } | |
1947 | if (free >= xattrsize) | |
1948 | return 1; | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | /* | |
1954 | * ocfs2_xattr_ibody_find() | |
1955 | * | |
1956 | * Find extended attribute in inode block and | |
1957 | * fill search info into struct ocfs2_xattr_search. | |
1958 | */ | |
1959 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1960 | int name_index, | |
1961 | const char *name, | |
1962 | struct ocfs2_xattr_search *xs) | |
1963 | { | |
1964 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1965 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1966 | int ret; | |
1967 | int has_space = 0; | |
1968 | ||
1969 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1970 | return 0; | |
1971 | ||
1972 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1973 | down_read(&oi->ip_alloc_sem); | |
1974 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1975 | up_read(&oi->ip_alloc_sem); | |
1976 | if (!has_space) | |
1977 | return 0; | |
1978 | } | |
1979 | ||
1980 | xs->xattr_bh = xs->inode_bh; | |
1981 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1982 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1983 | xs->header = (struct ocfs2_xattr_header *) | |
1984 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1985 | else | |
1986 | xs->header = (struct ocfs2_xattr_header *) | |
1987 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1988 | xs->base = (void *)xs->header; | |
1989 | xs->here = xs->header->xh_entries; | |
1990 | ||
1991 | /* Find the named attribute. */ | |
1992 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1993 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1994 | if (ret && ret != -ENODATA) | |
1995 | return ret; | |
1996 | xs->not_found = ret; | |
1997 | } | |
1998 | ||
1999 | return 0; | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * ocfs2_xattr_ibody_set() | |
2004 | * | |
2005 | * Set, replace or remove an extended attribute into inode block. | |
2006 | * | |
2007 | */ | |
2008 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2009 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2010 | struct ocfs2_xattr_search *xs, |
2011 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2012 | { |
2013 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2014 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2015 | int ret; | |
2016 | ||
2017 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2018 | return -ENOSPC; | |
2019 | ||
2020 | down_write(&oi->ip_alloc_sem); | |
2021 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2022 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2023 | ret = -ENOSPC; | |
2024 | goto out; | |
2025 | } | |
2026 | } | |
2027 | ||
78f30c31 | 2028 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2029 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2030 | out: | |
2031 | up_write(&oi->ip_alloc_sem); | |
2032 | ||
2033 | return ret; | |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * ocfs2_xattr_block_find() | |
2038 | * | |
2039 | * Find extended attribute in external block and | |
2040 | * fill search info into struct ocfs2_xattr_search. | |
2041 | */ | |
2042 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2043 | int name_index, | |
2044 | const char *name, | |
2045 | struct ocfs2_xattr_search *xs) | |
2046 | { | |
2047 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2048 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2049 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2050 | int ret = 0; |
2051 | ||
2052 | if (!di->i_xattr_loc) | |
2053 | return ret; | |
2054 | ||
4ae1d69b JB |
2055 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2056 | &blk_bh); | |
cf1d6c76 TY |
2057 | if (ret < 0) { |
2058 | mlog_errno(ret); | |
2059 | return ret; | |
2060 | } | |
f6087fb7 | 2061 | |
cf1d6c76 | 2062 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2063 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2064 | |
2065 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2066 | xs->header = &xb->xb_attrs.xb_header; | |
2067 | xs->base = (void *)xs->header; | |
2068 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2069 | xs->here = xs->header->xh_entries; | |
2070 | ||
2071 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2072 | } else | |
2073 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2074 | name_index, | |
2075 | name, xs); | |
cf1d6c76 | 2076 | |
cf1d6c76 TY |
2077 | if (ret && ret != -ENODATA) { |
2078 | xs->xattr_bh = NULL; | |
2079 | goto cleanup; | |
2080 | } | |
2081 | xs->not_found = ret; | |
2082 | return 0; | |
cf1d6c76 TY |
2083 | cleanup: |
2084 | brelse(blk_bh); | |
2085 | ||
2086 | return ret; | |
2087 | } | |
2088 | ||
2089 | /* | |
2090 | * ocfs2_xattr_block_set() | |
2091 | * | |
2092 | * Set, replace or remove an extended attribute into external block. | |
2093 | * | |
2094 | */ | |
2095 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2096 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2097 | struct ocfs2_xattr_search *xs, |
2098 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2099 | { |
2100 | struct buffer_head *new_bh = NULL; | |
2101 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2102 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
85db90e7 | 2103 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
2104 | struct ocfs2_xattr_block *xblk = NULL; |
2105 | u16 suballoc_bit_start; | |
2106 | u32 num_got; | |
2107 | u64 first_blkno; | |
2108 | int ret; | |
2109 | ||
2110 | if (!xs->xattr_bh) { | |
0cf2f763 JB |
2111 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), |
2112 | xs->inode_bh, | |
84008972 | 2113 | OCFS2_JOURNAL_ACCESS_CREATE); |
cf1d6c76 TY |
2114 | if (ret < 0) { |
2115 | mlog_errno(ret); | |
85db90e7 | 2116 | goto end; |
cf1d6c76 TY |
2117 | } |
2118 | ||
78f30c31 | 2119 | ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, |
cf1d6c76 TY |
2120 | &suballoc_bit_start, &num_got, |
2121 | &first_blkno); | |
2122 | if (ret < 0) { | |
2123 | mlog_errno(ret); | |
85db90e7 | 2124 | goto end; |
cf1d6c76 TY |
2125 | } |
2126 | ||
2127 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
8cb471e8 | 2128 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); |
cf1d6c76 | 2129 | |
0cf2f763 JB |
2130 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), |
2131 | new_bh, | |
84008972 | 2132 | OCFS2_JOURNAL_ACCESS_CREATE); |
cf1d6c76 TY |
2133 | if (ret < 0) { |
2134 | mlog_errno(ret); | |
85db90e7 | 2135 | goto end; |
cf1d6c76 TY |
2136 | } |
2137 | ||
2138 | /* Initialize ocfs2_xattr_block */ | |
2139 | xs->xattr_bh = new_bh; | |
2140 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2141 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2142 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2143 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2144 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2145 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2146 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2147 | ||
2148 | xs->header = &xblk->xb_attrs.xb_header; | |
2149 | xs->base = (void *)xs->header; | |
2150 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2151 | xs->here = xs->header->xh_entries; | |
2152 | ||
cf1d6c76 TY |
2153 | ret = ocfs2_journal_dirty(handle, new_bh); |
2154 | if (ret < 0) { | |
2155 | mlog_errno(ret); | |
85db90e7 | 2156 | goto end; |
cf1d6c76 TY |
2157 | } |
2158 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
85db90e7 | 2159 | ocfs2_journal_dirty(handle, xs->inode_bh); |
01225596 TM |
2160 | } else |
2161 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2162 | ||
2163 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2164 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2165 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2166 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2167 | if (!ret || ret != -ENOSPC) |
2168 | goto end; | |
2169 | ||
78f30c31 | 2170 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2171 | if (ret) |
2172 | goto end; | |
cf1d6c76 TY |
2173 | } |
2174 | ||
78f30c31 | 2175 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2176 | |
2177 | end: | |
cf1d6c76 TY |
2178 | |
2179 | return ret; | |
2180 | } | |
2181 | ||
78f30c31 TM |
2182 | /* Check whether the new xattr can be inserted into the inode. */ |
2183 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2184 | struct ocfs2_xattr_info *xi, | |
2185 | struct ocfs2_xattr_search *xs) | |
2186 | { | |
2187 | u64 value_size; | |
2188 | struct ocfs2_xattr_entry *last; | |
2189 | int free, i; | |
2190 | size_t min_offs = xs->end - xs->base; | |
2191 | ||
2192 | if (!xs->header) | |
2193 | return 0; | |
2194 | ||
2195 | last = xs->header->xh_entries; | |
2196 | ||
2197 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2198 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2199 | if (offs < min_offs) | |
2200 | min_offs = offs; | |
2201 | last += 1; | |
2202 | } | |
2203 | ||
4442f518 | 2204 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2205 | if (free < 0) |
2206 | return 0; | |
2207 | ||
2208 | BUG_ON(!xs->not_found); | |
2209 | ||
2210 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2211 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2212 | else | |
2213 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2214 | ||
2215 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2216 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2217 | return 1; | |
2218 | ||
2219 | return 0; | |
2220 | } | |
2221 | ||
2222 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2223 | struct ocfs2_dinode *di, | |
2224 | struct ocfs2_xattr_info *xi, | |
2225 | struct ocfs2_xattr_search *xis, | |
2226 | struct ocfs2_xattr_search *xbs, | |
2227 | int *clusters_need, | |
85db90e7 TM |
2228 | int *meta_need, |
2229 | int *credits_need) | |
78f30c31 TM |
2230 | { |
2231 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2232 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2233 | struct buffer_head *bh = NULL; |
2234 | struct ocfs2_xattr_block *xb = NULL; | |
2235 | struct ocfs2_xattr_entry *xe = NULL; | |
2236 | struct ocfs2_xattr_value_root *xv = NULL; | |
2237 | char *base = NULL; | |
2238 | int name_offset, name_len = 0; | |
2239 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2240 | xi->value_len); | |
2241 | u64 value_size; | |
2242 | ||
71d548a6 TM |
2243 | /* |
2244 | * Calculate the clusters we need to write. | |
2245 | * No matter whether we replace an old one or add a new one, | |
2246 | * we need this for writing. | |
2247 | */ | |
2248 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2249 | credits += new_clusters * | |
2250 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2251 | ||
78f30c31 | 2252 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2253 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2254 | ||
2255 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2256 | clusters_add += new_clusters; |
85db90e7 TM |
2257 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2258 | &def_xv.xv.xr_list, | |
2259 | new_clusters); | |
2260 | } | |
78f30c31 TM |
2261 | |
2262 | goto meta_guess; | |
2263 | } | |
2264 | ||
2265 | if (!xis->not_found) { | |
2266 | xe = xis->here; | |
2267 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2268 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2269 | base = xis->base; | |
85db90e7 | 2270 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2271 | } else { |
970e4936 | 2272 | int i, block_off = 0; |
78f30c31 TM |
2273 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2274 | xe = xbs->here; | |
2275 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2276 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2277 | i = xbs->here - xbs->header->xh_entries; | |
2278 | old_in_xb = 1; | |
2279 | ||
2280 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2281 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2282 | bucket_xh(xbs->bucket), | |
2283 | i, &block_off, | |
2284 | &name_offset); | |
2285 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2286 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2287 | } else { | |
78f30c31 | 2288 | base = xbs->base; |
85db90e7 TM |
2289 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2290 | } | |
2291 | } | |
2292 | ||
2293 | /* | |
2294 | * delete a xattr doesn't need metadata and cluster allocation. | |
2295 | * so just calculate the credits and return. | |
2296 | * | |
2297 | * The credits for removing the value tree will be extended | |
2298 | * by ocfs2_remove_extent itself. | |
2299 | */ | |
2300 | if (!xi->value) { | |
2301 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2302 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2303 | |
2304 | goto out; | |
78f30c31 TM |
2305 | } |
2306 | ||
2307 | /* do cluster allocation guess first. */ | |
2308 | value_size = le64_to_cpu(xe->xe_value_size); | |
2309 | ||
2310 | if (old_in_xb) { | |
2311 | /* | |
2312 | * In xattr set, we always try to set the xe in inode first, | |
2313 | * so if it can be inserted into inode successfully, the old | |
2314 | * one will be removed from the xattr block, and this xattr | |
2315 | * will be inserted into inode as a new xattr in inode. | |
2316 | */ | |
2317 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2318 | clusters_add += new_clusters; | |
a90714c1 | 2319 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2320 | OCFS2_INODE_UPDATE_CREDITS; |
2321 | if (!ocfs2_xattr_is_local(xe)) | |
2322 | credits += ocfs2_calc_extend_credits( | |
2323 | inode->i_sb, | |
2324 | &def_xv.xv.xr_list, | |
2325 | new_clusters); | |
78f30c31 TM |
2326 | goto out; |
2327 | } | |
2328 | } | |
2329 | ||
2330 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2331 | /* the new values will be stored outside. */ | |
2332 | u32 old_clusters = 0; | |
2333 | ||
2334 | if (!ocfs2_xattr_is_local(xe)) { | |
2335 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2336 | value_size); | |
2337 | xv = (struct ocfs2_xattr_value_root *) | |
2338 | (base + name_offset + name_len); | |
97aff52a | 2339 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2340 | } else |
2341 | xv = &def_xv.xv; | |
2342 | ||
85db90e7 | 2343 | if (old_clusters >= new_clusters) { |
a90714c1 | 2344 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2345 | goto out; |
85db90e7 | 2346 | } else { |
78f30c31 TM |
2347 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2348 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2349 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2350 | &xv->xr_list, | |
2351 | new_clusters - | |
2352 | old_clusters); | |
97aff52a TM |
2353 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2354 | goto out; | |
78f30c31 TM |
2355 | } |
2356 | } else { | |
2357 | /* | |
2358 | * Now the new value will be stored inside. So if the new | |
2359 | * value is smaller than the size of value root or the old | |
2360 | * value, we don't need any allocation, otherwise we have | |
2361 | * to guess metadata allocation. | |
2362 | */ | |
2363 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2364 | (!ocfs2_xattr_is_local(xe) && | |
2365 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2366 | goto out; | |
2367 | } | |
2368 | ||
2369 | meta_guess: | |
2370 | /* calculate metadata allocation. */ | |
2371 | if (di->i_xattr_loc) { | |
2372 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2373 | ret = ocfs2_read_xattr_block(inode, |
2374 | le64_to_cpu(di->i_xattr_loc), | |
2375 | &bh); | |
78f30c31 TM |
2376 | if (ret) { |
2377 | mlog_errno(ret); | |
2378 | goto out; | |
2379 | } | |
2380 | ||
2381 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2382 | } else | |
2383 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2384 | ||
90cb546c TM |
2385 | /* |
2386 | * If there is already an xattr tree, good, we can calculate | |
2387 | * like other b-trees. Otherwise we may have the chance of | |
2388 | * create a tree, the credit calculation is borrowed from | |
2389 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2390 | * new tree will be cluster based, so no meta is needed. | |
2391 | */ | |
78f30c31 TM |
2392 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2393 | struct ocfs2_extent_list *el = | |
2394 | &xb->xb_attrs.xb_root.xt_list; | |
2395 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2396 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2397 | el, 1); | |
90cb546c TM |
2398 | } else |
2399 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2400 | |
2401 | /* | |
2402 | * This cluster will be used either for new bucket or for | |
2403 | * new xattr block. | |
2404 | * If the cluster size is the same as the bucket size, one | |
2405 | * more is needed since we may need to extend the bucket | |
2406 | * also. | |
2407 | */ | |
2408 | clusters_add += 1; | |
85db90e7 | 2409 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2410 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2411 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2412 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2413 | clusters_add += 1; |
85db90e7 TM |
2414 | } |
2415 | } else { | |
78f30c31 | 2416 | meta_add += 1; |
85db90e7 TM |
2417 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2418 | } | |
78f30c31 TM |
2419 | out: |
2420 | if (clusters_need) | |
2421 | *clusters_need = clusters_add; | |
2422 | if (meta_need) | |
2423 | *meta_need = meta_add; | |
85db90e7 TM |
2424 | if (credits_need) |
2425 | *credits_need = credits; | |
78f30c31 TM |
2426 | brelse(bh); |
2427 | return ret; | |
2428 | } | |
2429 | ||
2430 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2431 | struct ocfs2_dinode *di, | |
2432 | struct ocfs2_xattr_info *xi, | |
2433 | struct ocfs2_xattr_search *xis, | |
2434 | struct ocfs2_xattr_search *xbs, | |
85db90e7 TM |
2435 | struct ocfs2_xattr_set_ctxt *ctxt, |
2436 | int *credits) | |
78f30c31 TM |
2437 | { |
2438 | int clusters_add, meta_add, ret; | |
2439 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2440 | ||
2441 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2442 | ||
2443 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2444 | ||
2445 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2446 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2447 | if (ret) { |
2448 | mlog_errno(ret); | |
2449 | return ret; | |
2450 | } | |
2451 | ||
85db90e7 TM |
2452 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2453 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2454 | |
2455 | if (meta_add) { | |
2456 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2457 | &ctxt->meta_ac); | |
2458 | if (ret) { | |
2459 | mlog_errno(ret); | |
2460 | goto out; | |
2461 | } | |
2462 | } | |
2463 | ||
2464 | if (clusters_add) { | |
2465 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2466 | if (ret) | |
2467 | mlog_errno(ret); | |
2468 | } | |
2469 | out: | |
2470 | if (ret) { | |
2471 | if (ctxt->meta_ac) { | |
2472 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2473 | ctxt->meta_ac = NULL; | |
2474 | } | |
2475 | ||
2476 | /* | |
2477 | * We cannot have an error and a non null ctxt->data_ac. | |
2478 | */ | |
2479 | } | |
2480 | ||
2481 | return ret; | |
2482 | } | |
2483 | ||
85db90e7 TM |
2484 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2485 | struct ocfs2_dinode *di, | |
2486 | struct ocfs2_xattr_info *xi, | |
2487 | struct ocfs2_xattr_search *xis, | |
2488 | struct ocfs2_xattr_search *xbs, | |
2489 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2490 | { | |
9f868f16 | 2491 | int ret = 0, credits, old_found; |
85db90e7 TM |
2492 | |
2493 | if (!xi->value) { | |
2494 | /* Remove existing extended attribute */ | |
2495 | if (!xis->not_found) | |
2496 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2497 | else if (!xbs->not_found) | |
2498 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2499 | } else { | |
2500 | /* We always try to set extended attribute into inode first*/ | |
2501 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2502 | if (!ret && !xbs->not_found) { | |
2503 | /* | |
2504 | * If succeed and that extended attribute existing in | |
2505 | * external block, then we will remove it. | |
2506 | */ | |
2507 | xi->value = NULL; | |
2508 | xi->value_len = 0; | |
2509 | ||
9f868f16 | 2510 | old_found = xis->not_found; |
85db90e7 TM |
2511 | xis->not_found = -ENODATA; |
2512 | ret = ocfs2_calc_xattr_set_need(inode, | |
2513 | di, | |
2514 | xi, | |
2515 | xis, | |
2516 | xbs, | |
2517 | NULL, | |
2518 | NULL, | |
2519 | &credits); | |
9f868f16 | 2520 | xis->not_found = old_found; |
85db90e7 TM |
2521 | if (ret) { |
2522 | mlog_errno(ret); | |
2523 | goto out; | |
2524 | } | |
2525 | ||
2526 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2527 | ctxt->handle->h_buffer_credits); | |
2528 | if (ret) { | |
2529 | mlog_errno(ret); | |
2530 | goto out; | |
2531 | } | |
2532 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2533 | } else if (ret == -ENOSPC) { | |
2534 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2535 | ret = ocfs2_xattr_block_find(inode, | |
2536 | xi->name_index, | |
2537 | xi->name, xbs); | |
2538 | if (ret) | |
2539 | goto out; | |
2540 | ||
9f868f16 | 2541 | old_found = xis->not_found; |
85db90e7 TM |
2542 | xis->not_found = -ENODATA; |
2543 | ret = ocfs2_calc_xattr_set_need(inode, | |
2544 | di, | |
2545 | xi, | |
2546 | xis, | |
2547 | xbs, | |
2548 | NULL, | |
2549 | NULL, | |
2550 | &credits); | |
9f868f16 | 2551 | xis->not_found = old_found; |
85db90e7 TM |
2552 | if (ret) { |
2553 | mlog_errno(ret); | |
2554 | goto out; | |
2555 | } | |
2556 | ||
2557 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2558 | ctxt->handle->h_buffer_credits); | |
2559 | if (ret) { | |
2560 | mlog_errno(ret); | |
2561 | goto out; | |
2562 | } | |
2563 | } | |
2564 | /* | |
2565 | * If no space in inode, we will set extended attribute | |
2566 | * into external block. | |
2567 | */ | |
2568 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2569 | if (ret) | |
2570 | goto out; | |
2571 | if (!xis->not_found) { | |
2572 | /* | |
2573 | * If succeed and that extended attribute | |
2574 | * existing in inode, we will remove it. | |
2575 | */ | |
2576 | xi->value = NULL; | |
2577 | xi->value_len = 0; | |
2578 | xbs->not_found = -ENODATA; | |
2579 | ret = ocfs2_calc_xattr_set_need(inode, | |
2580 | di, | |
2581 | xi, | |
2582 | xis, | |
2583 | xbs, | |
2584 | NULL, | |
2585 | NULL, | |
2586 | &credits); | |
2587 | if (ret) { | |
2588 | mlog_errno(ret); | |
2589 | goto out; | |
2590 | } | |
2591 | ||
2592 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2593 | ctxt->handle->h_buffer_credits); | |
2594 | if (ret) { | |
2595 | mlog_errno(ret); | |
2596 | goto out; | |
2597 | } | |
2598 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2599 | xis, ctxt); | |
2600 | } | |
2601 | } | |
2602 | } | |
2603 | ||
4b3f6209 TM |
2604 | if (!ret) { |
2605 | /* Update inode ctime. */ | |
0cf2f763 | 2606 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
2607 | xis->inode_bh, |
2608 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2609 | if (ret) { |
2610 | mlog_errno(ret); | |
2611 | goto out; | |
2612 | } | |
2613 | ||
2614 | inode->i_ctime = CURRENT_TIME; | |
2615 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2616 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2617 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2618 | } | |
85db90e7 TM |
2619 | out: |
2620 | return ret; | |
2621 | } | |
2622 | ||
6c3faba4 TY |
2623 | /* |
2624 | * This function only called duing creating inode | |
2625 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2626 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2627 | */ |
2628 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2629 | struct inode *inode, | |
2630 | struct buffer_head *di_bh, | |
2631 | int name_index, | |
2632 | const char *name, | |
2633 | const void *value, | |
2634 | size_t value_len, | |
2635 | int flags, | |
2636 | struct ocfs2_alloc_context *meta_ac, | |
2637 | struct ocfs2_alloc_context *data_ac) | |
2638 | { | |
2639 | struct ocfs2_dinode *di; | |
2640 | int ret; | |
2641 | ||
2642 | struct ocfs2_xattr_info xi = { | |
2643 | .name_index = name_index, | |
2644 | .name = name, | |
2645 | .value = value, | |
2646 | .value_len = value_len, | |
2647 | }; | |
2648 | ||
2649 | struct ocfs2_xattr_search xis = { | |
2650 | .not_found = -ENODATA, | |
2651 | }; | |
2652 | ||
2653 | struct ocfs2_xattr_search xbs = { | |
2654 | .not_found = -ENODATA, | |
2655 | }; | |
2656 | ||
2657 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2658 | .handle = handle, | |
2659 | .meta_ac = meta_ac, | |
2660 | .data_ac = data_ac, | |
2661 | }; | |
2662 | ||
2663 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2664 | return -EOPNOTSUPP; | |
2665 | ||
008aafaf TY |
2666 | /* |
2667 | * In extreme situation, may need xattr bucket when | |
2668 | * block size is too small. And we have already reserved | |
2669 | * the credits for bucket in mknod. | |
2670 | */ | |
2671 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2672 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2673 | if (!xbs.bucket) { | |
2674 | mlog_errno(-ENOMEM); | |
2675 | return -ENOMEM; | |
2676 | } | |
2677 | } | |
2678 | ||
6c3faba4 TY |
2679 | xis.inode_bh = xbs.inode_bh = di_bh; |
2680 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2681 | ||
2682 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2683 | ||
2684 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2685 | if (ret) | |
2686 | goto cleanup; | |
2687 | if (xis.not_found) { | |
2688 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2689 | if (ret) | |
2690 | goto cleanup; | |
2691 | } | |
2692 | ||
2693 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2694 | ||
2695 | cleanup: | |
2696 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2697 | brelse(xbs.xattr_bh); | |
008aafaf | 2698 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2699 | |
2700 | return ret; | |
2701 | } | |
2702 | ||
cf1d6c76 TY |
2703 | /* |
2704 | * ocfs2_xattr_set() | |
2705 | * | |
2706 | * Set, replace or remove an extended attribute for this inode. | |
2707 | * value is NULL to remove an existing extended attribute, else either | |
2708 | * create or replace an extended attribute. | |
2709 | */ | |
2710 | int ocfs2_xattr_set(struct inode *inode, | |
2711 | int name_index, | |
2712 | const char *name, | |
2713 | const void *value, | |
2714 | size_t value_len, | |
2715 | int flags) | |
2716 | { | |
2717 | struct buffer_head *di_bh = NULL; | |
2718 | struct ocfs2_dinode *di; | |
85db90e7 | 2719 | int ret, credits; |
78f30c31 | 2720 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2721 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2722 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
cf1d6c76 TY |
2723 | |
2724 | struct ocfs2_xattr_info xi = { | |
2725 | .name_index = name_index, | |
2726 | .name = name, | |
2727 | .value = value, | |
2728 | .value_len = value_len, | |
2729 | }; | |
2730 | ||
2731 | struct ocfs2_xattr_search xis = { | |
2732 | .not_found = -ENODATA, | |
2733 | }; | |
2734 | ||
2735 | struct ocfs2_xattr_search xbs = { | |
2736 | .not_found = -ENODATA, | |
2737 | }; | |
2738 | ||
8154da3d TY |
2739 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2740 | return -EOPNOTSUPP; | |
2741 | ||
ba937127 JB |
2742 | /* |
2743 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2744 | * bucket. | |
2745 | */ | |
2746 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2747 | if (!xbs.bucket) { | |
2748 | mlog_errno(-ENOMEM); | |
2749 | return -ENOMEM; | |
2750 | } | |
2751 | ||
cf1d6c76 TY |
2752 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2753 | if (ret < 0) { | |
2754 | mlog_errno(ret); | |
ba937127 | 2755 | goto cleanup_nolock; |
cf1d6c76 TY |
2756 | } |
2757 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2758 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2759 | ||
2760 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2761 | /* | |
2762 | * Scan inode and external block to find the same name | |
2763 | * extended attribute and collect search infomation. | |
2764 | */ | |
2765 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2766 | if (ret) | |
2767 | goto cleanup; | |
2768 | if (xis.not_found) { | |
2769 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2770 | if (ret) | |
2771 | goto cleanup; | |
2772 | } | |
2773 | ||
2774 | if (xis.not_found && xbs.not_found) { | |
2775 | ret = -ENODATA; | |
2776 | if (flags & XATTR_REPLACE) | |
2777 | goto cleanup; | |
2778 | ret = 0; | |
2779 | if (!value) | |
2780 | goto cleanup; | |
2781 | } else { | |
2782 | ret = -EEXIST; | |
2783 | if (flags & XATTR_CREATE) | |
2784 | goto cleanup; | |
2785 | } | |
2786 | ||
85db90e7 TM |
2787 | |
2788 | mutex_lock(&tl_inode->i_mutex); | |
2789 | ||
2790 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2791 | ret = __ocfs2_flush_truncate_log(osb); | |
2792 | if (ret < 0) { | |
2793 | mutex_unlock(&tl_inode->i_mutex); | |
2794 | mlog_errno(ret); | |
2795 | goto cleanup; | |
2796 | } | |
2797 | } | |
2798 | mutex_unlock(&tl_inode->i_mutex); | |
2799 | ||
2800 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
2801 | &xbs, &ctxt, &credits); | |
78f30c31 TM |
2802 | if (ret) { |
2803 | mlog_errno(ret); | |
2804 | goto cleanup; | |
2805 | } | |
2806 | ||
4b3f6209 TM |
2807 | /* we need to update inode's ctime field, so add credit for it. */ |
2808 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
85db90e7 TM |
2809 | ctxt.handle = ocfs2_start_trans(osb, credits); |
2810 | if (IS_ERR(ctxt.handle)) { | |
2811 | ret = PTR_ERR(ctxt.handle); | |
2812 | mlog_errno(ret); | |
2813 | goto cleanup; | |
cf1d6c76 | 2814 | } |
85db90e7 TM |
2815 | |
2816 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2817 | ||
2818 | ocfs2_commit_trans(osb, ctxt.handle); | |
2819 | ||
78f30c31 TM |
2820 | if (ctxt.data_ac) |
2821 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2822 | if (ctxt.meta_ac) | |
2823 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2824 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2825 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2826 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2827 | cleanup: |
2828 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2829 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2830 | cleanup_nolock: |
cf1d6c76 TY |
2831 | brelse(di_bh); |
2832 | brelse(xbs.xattr_bh); | |
ba937127 | 2833 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2834 | |
2835 | return ret; | |
2836 | } | |
2837 | ||
0c044f0b TM |
2838 | /* |
2839 | * Find the xattr extent rec which may contains name_hash. | |
2840 | * e_cpos will be the first name hash of the xattr rec. | |
2841 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2842 | */ | |
2843 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2844 | u32 name_hash, | |
2845 | u64 *p_blkno, | |
2846 | u32 *e_cpos, | |
2847 | u32 *num_clusters, | |
2848 | struct ocfs2_extent_list *el) | |
2849 | { | |
2850 | int ret = 0, i; | |
2851 | struct buffer_head *eb_bh = NULL; | |
2852 | struct ocfs2_extent_block *eb; | |
2853 | struct ocfs2_extent_rec *rec = NULL; | |
2854 | u64 e_blkno = 0; | |
2855 | ||
2856 | if (el->l_tree_depth) { | |
2857 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2858 | if (ret) { | |
2859 | mlog_errno(ret); | |
2860 | goto out; | |
2861 | } | |
2862 | ||
2863 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2864 | el = &eb->h_list; | |
2865 | ||
2866 | if (el->l_tree_depth) { | |
2867 | ocfs2_error(inode->i_sb, | |
2868 | "Inode %lu has non zero tree depth in " | |
2869 | "xattr tree block %llu\n", inode->i_ino, | |
2870 | (unsigned long long)eb_bh->b_blocknr); | |
2871 | ret = -EROFS; | |
2872 | goto out; | |
2873 | } | |
2874 | } | |
2875 | ||
2876 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2877 | rec = &el->l_recs[i]; | |
2878 | ||
2879 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2880 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2881 | break; | |
2882 | } | |
2883 | } | |
2884 | ||
2885 | if (!e_blkno) { | |
2886 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2887 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2888 | le32_to_cpu(rec->e_cpos), | |
2889 | ocfs2_rec_clusters(el, rec)); | |
2890 | ret = -EROFS; | |
2891 | goto out; | |
2892 | } | |
2893 | ||
2894 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2895 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2896 | if (e_cpos) | |
2897 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2898 | out: | |
2899 | brelse(eb_bh); | |
2900 | return ret; | |
2901 | } | |
2902 | ||
2903 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2904 | struct ocfs2_xattr_bucket *bucket, | |
2905 | void *para); | |
2906 | ||
589dc260 | 2907 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2908 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2909 | int name_index, |
2910 | const char *name, | |
2911 | u32 name_hash, | |
2912 | u16 *xe_index, | |
2913 | int *found) | |
2914 | { | |
2915 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2916 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2917 | size_t name_len = strlen(name); |
2918 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2919 | char *xe_name; |
2920 | ||
2921 | /* | |
2922 | * We don't use binary search in the bucket because there | |
2923 | * may be multiple entries with the same name hash. | |
2924 | */ | |
2925 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2926 | xe = &xh->xh_entries[i]; | |
2927 | ||
2928 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2929 | continue; | |
2930 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2931 | break; | |
2932 | ||
2933 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2934 | if (!cmp) | |
2935 | cmp = name_len - xe->xe_name_len; | |
2936 | if (cmp) | |
2937 | continue; | |
2938 | ||
2939 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2940 | xh, | |
2941 | i, | |
2942 | &block_off, | |
2943 | &new_offset); | |
2944 | if (ret) { | |
2945 | mlog_errno(ret); | |
2946 | break; | |
2947 | } | |
2948 | ||
970e4936 | 2949 | |
e2356a3f JB |
2950 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2951 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2952 | *xe_index = i; |
2953 | *found = 1; | |
2954 | ret = 0; | |
2955 | break; | |
2956 | } | |
2957 | } | |
2958 | ||
2959 | return ret; | |
2960 | } | |
2961 | ||
2962 | /* | |
2963 | * Find the specified xattr entry in a series of buckets. | |
2964 | * This series start from p_blkno and last for num_clusters. | |
2965 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2966 | * the num of the valid buckets. | |
2967 | * | |
2968 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2969 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2970 | */ | |
2971 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2972 | int name_index, | |
2973 | const char *name, | |
2974 | u32 name_hash, | |
2975 | u64 p_blkno, | |
2976 | u32 first_hash, | |
2977 | u32 num_clusters, | |
2978 | struct ocfs2_xattr_search *xs) | |
2979 | { | |
2980 | int ret, found = 0; | |
589dc260 TM |
2981 | struct ocfs2_xattr_header *xh = NULL; |
2982 | struct ocfs2_xattr_entry *xe = NULL; | |
2983 | u16 index = 0; | |
2984 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2985 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2986 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2987 | u32 last_hash; |
e2356a3f | 2988 | u64 blkno, lower_blkno = 0; |
589dc260 | 2989 | |
e2356a3f JB |
2990 | search = ocfs2_xattr_bucket_new(inode); |
2991 | if (!search) { | |
2992 | ret = -ENOMEM; | |
2993 | mlog_errno(ret); | |
2994 | goto out; | |
2995 | } | |
2996 | ||
2997 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2998 | if (ret) { |
2999 | mlog_errno(ret); | |
3000 | goto out; | |
3001 | } | |
3002 | ||
e2356a3f | 3003 | xh = bucket_xh(search); |
589dc260 | 3004 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3005 | while (low_bucket <= high_bucket) { |
e2356a3f | 3006 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3007 | |
e2356a3f | 3008 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3009 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3010 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3011 | if (ret) { |
3012 | mlog_errno(ret); | |
3013 | goto out; | |
3014 | } | |
3015 | ||
e2356a3f | 3016 | xh = bucket_xh(search); |
589dc260 TM |
3017 | xe = &xh->xh_entries[0]; |
3018 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3019 | high_bucket = bucket - 1; | |
3020 | continue; | |
3021 | } | |
3022 | ||
3023 | /* | |
3024 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3025 | * bucket is larger than the search one. for an empty |
3026 | * bucket, the last one is also the first one. | |
589dc260 | 3027 | */ |
5a095611 TM |
3028 | if (xh->xh_count) |
3029 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3030 | ||
589dc260 TM |
3031 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3032 | ||
e2356a3f JB |
3033 | /* record lower_blkno which may be the insert place. */ |
3034 | lower_blkno = blkno; | |
589dc260 TM |
3035 | |
3036 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3037 | low_bucket = bucket + 1; | |
3038 | continue; | |
3039 | } | |
3040 | ||
3041 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3042 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3043 | name_index, name, name_hash, |
3044 | &index, &found); | |
3045 | if (ret) { | |
3046 | mlog_errno(ret); | |
3047 | goto out; | |
3048 | } | |
3049 | break; | |
3050 | } | |
3051 | ||
3052 | /* | |
3053 | * Record the bucket we have found. | |
3054 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3055 | * always set it to the previous bucket. | |
3056 | */ | |
e2356a3f JB |
3057 | if (!lower_blkno) |
3058 | lower_blkno = p_blkno; | |
3059 | ||
3060 | /* This should be in cache - we just read it during the search */ | |
3061 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3062 | if (ret) { | |
3063 | mlog_errno(ret); | |
3064 | goto out; | |
589dc260 | 3065 | } |
589dc260 | 3066 | |
ba937127 JB |
3067 | xs->header = bucket_xh(xs->bucket); |
3068 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3069 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3070 | ||
3071 | if (found) { | |
589dc260 TM |
3072 | xs->here = &xs->header->xh_entries[index]; |
3073 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3074 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3075 | } else |
3076 | ret = -ENODATA; | |
3077 | ||
3078 | out: | |
e2356a3f | 3079 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3080 | return ret; |
3081 | } | |
3082 | ||
3083 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3084 | struct buffer_head *root_bh, | |
3085 | int name_index, | |
3086 | const char *name, | |
3087 | struct ocfs2_xattr_search *xs) | |
3088 | { | |
3089 | int ret; | |
3090 | struct ocfs2_xattr_block *xb = | |
3091 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3092 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3093 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3094 | u64 p_blkno = 0; | |
3095 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3096 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3097 | |
3098 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3099 | return -ENODATA; | |
3100 | ||
3101 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3102 | name, name_hash, name_index); | |
3103 | ||
3104 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3105 | &num_clusters, el); | |
3106 | if (ret) { | |
3107 | mlog_errno(ret); | |
3108 | goto out; | |
3109 | } | |
3110 | ||
3111 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3112 | ||
3113 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3114 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3115 | first_hash); | |
589dc260 TM |
3116 | |
3117 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3118 | p_blkno, first_hash, num_clusters, xs); | |
3119 | ||
3120 | out: | |
3121 | return ret; | |
3122 | } | |
3123 | ||
0c044f0b TM |
3124 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3125 | u64 blkno, | |
3126 | u32 clusters, | |
3127 | xattr_bucket_func *func, | |
3128 | void *para) | |
3129 | { | |
6dde41d9 | 3130 | int i, ret = 0; |
0c044f0b TM |
3131 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3132 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3133 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3134 | |
ba937127 JB |
3135 | bucket = ocfs2_xattr_bucket_new(inode); |
3136 | if (!bucket) { | |
3137 | mlog_errno(-ENOMEM); | |
3138 | return -ENOMEM; | |
3139 | } | |
0c044f0b TM |
3140 | |
3141 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3142 | clusters, (unsigned long long)blkno); |
0c044f0b | 3143 | |
ba937127 JB |
3144 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3145 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3146 | if (ret) { |
3147 | mlog_errno(ret); | |
ba937127 | 3148 | break; |
0c044f0b TM |
3149 | } |
3150 | ||
0c044f0b TM |
3151 | /* |
3152 | * The real bucket num in this series of blocks is stored | |
3153 | * in the 1st bucket. | |
3154 | */ | |
3155 | if (i == 0) | |
ba937127 | 3156 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3157 | |
de29c085 MF |
3158 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3159 | (unsigned long long)blkno, | |
ba937127 | 3160 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3161 | if (func) { |
ba937127 | 3162 | ret = func(inode, bucket, para); |
a46fa684 | 3163 | if (ret && ret != -ERANGE) |
0c044f0b | 3164 | mlog_errno(ret); |
ba937127 | 3165 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3166 | } |
3167 | ||
ba937127 JB |
3168 | ocfs2_xattr_bucket_relse(bucket); |
3169 | if (ret) | |
3170 | break; | |
0c044f0b TM |
3171 | } |
3172 | ||
ba937127 | 3173 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3174 | return ret; |
3175 | } | |
3176 | ||
3177 | struct ocfs2_xattr_tree_list { | |
3178 | char *buffer; | |
3179 | size_t buffer_size; | |
936b8834 | 3180 | size_t result; |
0c044f0b TM |
3181 | }; |
3182 | ||
3183 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
3184 | struct ocfs2_xattr_header *xh, | |
3185 | int index, | |
3186 | int *block_off, | |
3187 | int *new_offset) | |
3188 | { | |
3189 | u16 name_offset; | |
3190 | ||
3191 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3192 | return -EINVAL; | |
3193 | ||
3194 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3195 | ||
3196 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
3197 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
3198 | ||
3199 | return 0; | |
3200 | } | |
3201 | ||
3202 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3203 | struct ocfs2_xattr_bucket *bucket, | |
3204 | void *para) | |
3205 | { | |
936b8834 | 3206 | int ret = 0, type; |
0c044f0b | 3207 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3208 | int i, block_off, new_offset; |
936b8834 | 3209 | const char *prefix, *name; |
0c044f0b | 3210 | |
3e632946 JB |
3211 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3212 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3213 | type = ocfs2_xattr_get_type(entry); |
3214 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3215 | |
936b8834 | 3216 | if (prefix) { |
0c044f0b | 3217 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 3218 | bucket_xh(bucket), |
0c044f0b TM |
3219 | i, |
3220 | &block_off, | |
3221 | &new_offset); | |
3222 | if (ret) | |
3223 | break; | |
936b8834 | 3224 | |
51def39f | 3225 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3226 | new_offset; |
3227 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3228 | xl->buffer_size, | |
3229 | &xl->result, | |
3230 | prefix, name, | |
3231 | entry->xe_name_len); | |
3232 | if (ret) | |
3233 | break; | |
0c044f0b TM |
3234 | } |
3235 | } | |
3236 | ||
3237 | return ret; | |
3238 | } | |
3239 | ||
3240 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3241 | struct ocfs2_xattr_tree_root *xt, | |
3242 | char *buffer, | |
3243 | size_t buffer_size) | |
3244 | { | |
3245 | struct ocfs2_extent_list *el = &xt->xt_list; | |
3246 | int ret = 0; | |
3247 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3248 | u64 p_blkno = 0; | |
3249 | struct ocfs2_xattr_tree_list xl = { | |
3250 | .buffer = buffer, | |
3251 | .buffer_size = buffer_size, | |
936b8834 | 3252 | .result = 0, |
0c044f0b TM |
3253 | }; |
3254 | ||
3255 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3256 | return 0; | |
3257 | ||
3258 | while (name_hash > 0) { | |
3259 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3260 | &e_cpos, &num_clusters, el); | |
3261 | if (ret) { | |
3262 | mlog_errno(ret); | |
3263 | goto out; | |
3264 | } | |
3265 | ||
3266 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
3267 | ocfs2_list_xattr_bucket, | |
3268 | &xl); | |
3269 | if (ret) { | |
a46fa684 TM |
3270 | if (ret != -ERANGE) |
3271 | mlog_errno(ret); | |
0c044f0b TM |
3272 | goto out; |
3273 | } | |
3274 | ||
3275 | if (e_cpos == 0) | |
3276 | break; | |
3277 | ||
3278 | name_hash = e_cpos - 1; | |
3279 | } | |
3280 | ||
936b8834 | 3281 | ret = xl.result; |
0c044f0b TM |
3282 | out: |
3283 | return ret; | |
3284 | } | |
01225596 TM |
3285 | |
3286 | static int cmp_xe(const void *a, const void *b) | |
3287 | { | |
3288 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3289 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3290 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3291 | ||
3292 | if (l_hash > r_hash) | |
3293 | return 1; | |
3294 | if (l_hash < r_hash) | |
3295 | return -1; | |
3296 | return 0; | |
3297 | } | |
3298 | ||
3299 | static void swap_xe(void *a, void *b, int size) | |
3300 | { | |
3301 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3302 | ||
3303 | tmp = *l; | |
3304 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3305 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3306 | } | |
3307 | ||
3308 | /* | |
3309 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3310 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3311 | * The header goes at the start of the bucket, and the names+values are |
3312 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3313 | * Note: we need to sort the entries since they are not saved in order |
3314 | * in the ocfs2_xattr_block. | |
3315 | */ | |
3316 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3317 | struct buffer_head *xb_bh, | |
178eeac3 | 3318 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3319 | { |
3320 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3321 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3322 | u16 offset, size, off_change; |
3323 | struct ocfs2_xattr_entry *xe; | |
3324 | struct ocfs2_xattr_block *xb = | |
3325 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3326 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3327 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3328 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3329 | char *src = xb_bh->b_data; |
3330 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3331 | |
3332 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3333 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3334 | (unsigned long long)bucket_blkno(bucket)); |
3335 | ||
3336 | for (i = 0; i < blks; i++) | |
3337 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3338 | |
01225596 TM |
3339 | /* |
3340 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3341 | * there is a offset change corresponding to the change of | |
3342 | * ocfs2_xattr_header's position. | |
3343 | */ | |
3344 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3345 | xe = &xb_xh->xh_entries[count - 1]; | |
3346 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3347 | size = blocksize - offset; | |
3348 | ||
3349 | /* copy all the names and values. */ | |
01225596 TM |
3350 | memcpy(target + offset, src + offset, size); |
3351 | ||
3352 | /* Init new header now. */ | |
3353 | xh->xh_count = xb_xh->xh_count; | |
3354 | xh->xh_num_buckets = cpu_to_le16(1); | |
3355 | xh->xh_name_value_len = cpu_to_le16(size); | |
3356 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3357 | ||
3358 | /* copy all the entries. */ | |
178eeac3 | 3359 | target = bucket_block(bucket, 0); |
01225596 TM |
3360 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3361 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3362 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3363 | ||
3364 | /* Change the xe offset for all the xe because of the move. */ | |
3365 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3366 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3367 | for (i = 0; i < count; i++) | |
3368 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3369 | ||
3370 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3371 | offset, size, off_change); | |
3372 | ||
3373 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3374 | cmp_xe, swap_xe); | |
3375 | } | |
3376 | ||
3377 | /* | |
3378 | * After we move xattr from block to index btree, we have to | |
3379 | * update ocfs2_xattr_search to the new xe and base. | |
3380 | * | |
3381 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3382 | * While if the entry is in index b-tree, "bucket" indicates the | |
3383 | * real place of the xattr. | |
3384 | */ | |
178eeac3 JB |
3385 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3386 | struct ocfs2_xattr_search *xs, | |
3387 | struct buffer_head *old_bh) | |
01225596 | 3388 | { |
01225596 TM |
3389 | char *buf = old_bh->b_data; |
3390 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3391 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3392 | int i; |
01225596 | 3393 | |
ba937127 | 3394 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3395 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3396 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3397 | ||
178eeac3 JB |
3398 | if (xs->not_found) |
3399 | return; | |
01225596 | 3400 | |
178eeac3 JB |
3401 | i = xs->here - old_xh->xh_entries; |
3402 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3403 | } |
3404 | ||
3405 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3406 | struct ocfs2_xattr_search *xs, |
3407 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3408 | { |
85db90e7 | 3409 | int ret; |
01225596 TM |
3410 | u32 bit_off, len; |
3411 | u64 blkno; | |
85db90e7 | 3412 | handle_t *handle = ctxt->handle; |
01225596 TM |
3413 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3414 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3415 | struct buffer_head *xb_bh = xs->xattr_bh; |
3416 | struct ocfs2_xattr_block *xb = | |
3417 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3418 | struct ocfs2_xattr_tree_root *xr; | |
3419 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3420 | |
3421 | mlog(0, "create xattr index block for %llu\n", | |
3422 | (unsigned long long)xb_bh->b_blocknr); | |
3423 | ||
3424 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3425 | BUG_ON(!xs->bucket); |
01225596 | 3426 | |
01225596 TM |
3427 | /* |
3428 | * XXX: | |
3429 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3430 | * if performance becomes a problem later. | |
3431 | */ | |
3432 | down_write(&oi->ip_alloc_sem); | |
3433 | ||
0cf2f763 | 3434 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 3435 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3436 | if (ret) { |
3437 | mlog_errno(ret); | |
85db90e7 | 3438 | goto out; |
01225596 TM |
3439 | } |
3440 | ||
78f30c31 TM |
3441 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3442 | 1, 1, &bit_off, &len); | |
01225596 TM |
3443 | if (ret) { |
3444 | mlog_errno(ret); | |
85db90e7 | 3445 | goto out; |
01225596 TM |
3446 | } |
3447 | ||
3448 | /* | |
3449 | * The bucket may spread in many blocks, and | |
3450 | * we will only touch the 1st block and the last block | |
3451 | * in the whole bucket(one for entry and one for data). | |
3452 | */ | |
3453 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3454 | ||
de29c085 MF |
3455 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3456 | (unsigned long long)blkno); | |
01225596 | 3457 | |
178eeac3 JB |
3458 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3459 | if (ret) { | |
01225596 | 3460 | mlog_errno(ret); |
85db90e7 | 3461 | goto out; |
01225596 TM |
3462 | } |
3463 | ||
178eeac3 JB |
3464 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3465 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3466 | if (ret) { |
3467 | mlog_errno(ret); | |
85db90e7 | 3468 | goto out; |
01225596 TM |
3469 | } |
3470 | ||
178eeac3 JB |
3471 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3472 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3473 | |
178eeac3 | 3474 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3475 | |
3476 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3477 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3478 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3479 | ||
3480 | xr = &xb->xb_attrs.xb_root; | |
3481 | xr->xt_clusters = cpu_to_le32(1); | |
3482 | xr->xt_last_eb_blk = 0; | |
3483 | xr->xt_list.l_tree_depth = 0; | |
3484 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3485 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3486 | ||
3487 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3488 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3489 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3490 | ||
3491 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3492 | ||
85db90e7 | 3493 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3494 | |
85db90e7 | 3495 | out: |
01225596 TM |
3496 | up_write(&oi->ip_alloc_sem); |
3497 | ||
01225596 TM |
3498 | return ret; |
3499 | } | |
3500 | ||
3501 | static int cmp_xe_offset(const void *a, const void *b) | |
3502 | { | |
3503 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3504 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3505 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3506 | ||
3507 | if (l_name_offset < r_name_offset) | |
3508 | return 1; | |
3509 | if (l_name_offset > r_name_offset) | |
3510 | return -1; | |
3511 | return 0; | |
3512 | } | |
3513 | ||
3514 | /* | |
3515 | * defrag a xattr bucket if we find that the bucket has some | |
3516 | * holes beteen name/value pairs. | |
3517 | * We will move all the name/value pairs to the end of the bucket | |
3518 | * so that we can spare some space for insertion. | |
3519 | */ | |
3520 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3521 | handle_t *handle, |
01225596 TM |
3522 | struct ocfs2_xattr_bucket *bucket) |
3523 | { | |
3524 | int ret, i; | |
3525 | size_t end, offset, len, value_len; | |
3526 | struct ocfs2_xattr_header *xh; | |
3527 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3528 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3529 | u16 xh_free_start; |
01225596 | 3530 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3531 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3532 | |
3533 | /* | |
3534 | * In order to make the operation more efficient and generic, | |
3535 | * we copy all the blocks into a contiguous memory and do the | |
3536 | * defragment there, so if anything is error, we will not touch | |
3537 | * the real block. | |
3538 | */ | |
3539 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3540 | if (!bucket_buf) { | |
3541 | ret = -EIO; | |
3542 | goto out; | |
3543 | } | |
3544 | ||
3545 | buf = bucket_buf; | |
1c32a2fd TM |
3546 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3547 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3548 | |
1c32a2fd | 3549 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3550 | OCFS2_JOURNAL_ACCESS_WRITE); |
3551 | if (ret < 0) { | |
3552 | mlog_errno(ret); | |
85db90e7 | 3553 | goto out; |
01225596 TM |
3554 | } |
3555 | ||
3556 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3557 | entries = (char *)xh->xh_entries; | |
3558 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3559 | ||
3560 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3561 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3562 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3563 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3564 | |
3565 | /* | |
3566 | * sort all the entries by their offset. | |
3567 | * the largest will be the first, so that we can | |
3568 | * move them to the end one by one. | |
3569 | */ | |
3570 | sort(entries, le16_to_cpu(xh->xh_count), | |
3571 | sizeof(struct ocfs2_xattr_entry), | |
3572 | cmp_xe_offset, swap_xe); | |
3573 | ||
3574 | /* Move all name/values to the end of the bucket. */ | |
3575 | xe = xh->xh_entries; | |
3576 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3577 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3578 | offset = le16_to_cpu(xe->xe_name_offset); | |
3579 | if (ocfs2_xattr_is_local(xe)) | |
3580 | value_len = OCFS2_XATTR_SIZE( | |
3581 | le64_to_cpu(xe->xe_value_size)); | |
3582 | else | |
3583 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3584 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3585 | ||
3586 | /* | |
3587 | * We must make sure that the name/value pair | |
3588 | * exist in the same block. So adjust end to | |
3589 | * the previous block end if needed. | |
3590 | */ | |
3591 | if (((end - len) / blocksize != | |
3592 | (end - 1) / blocksize)) | |
3593 | end = end - end % blocksize; | |
3594 | ||
3595 | if (end > offset + len) { | |
3596 | memmove(bucket_buf + end - len, | |
3597 | bucket_buf + offset, len); | |
3598 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3599 | } | |
3600 | ||
3601 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3602 | "bucket %llu\n", (unsigned long long)blkno); | |
3603 | ||
3604 | end -= len; | |
3605 | } | |
3606 | ||
3607 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3608 | "bucket %llu\n", (unsigned long long)blkno); | |
3609 | ||
3610 | if (xh_free_start == end) | |
85db90e7 | 3611 | goto out; |
01225596 TM |
3612 | |
3613 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3614 | xh->xh_free_start = cpu_to_le16(end); | |
3615 | ||
3616 | /* sort the entries by their name_hash. */ | |
3617 | sort(entries, le16_to_cpu(xh->xh_count), | |
3618 | sizeof(struct ocfs2_xattr_entry), | |
3619 | cmp_xe, swap_xe); | |
3620 | ||
3621 | buf = bucket_buf; | |
1c32a2fd TM |
3622 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3623 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3624 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3625 | |
01225596 | 3626 | out: |
01225596 TM |
3627 | kfree(bucket_buf); |
3628 | return ret; | |
3629 | } | |
3630 | ||
3631 | /* | |
b5c03e74 JB |
3632 | * prev_blkno points to the start of an existing extent. new_blkno |
3633 | * points to a newly allocated extent. Because we know each of our | |
3634 | * clusters contains more than bucket, we can easily split one cluster | |
3635 | * at a bucket boundary. So we take the last cluster of the existing | |
3636 | * extent and split it down the middle. We move the last half of the | |
3637 | * buckets in the last cluster of the existing extent over to the new | |
3638 | * extent. | |
01225596 | 3639 | * |
b5c03e74 JB |
3640 | * first_bh is the buffer at prev_blkno so we can update the existing |
3641 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3642 | * to insert our xattr. If the bucket move places the target in the new | |
3643 | * extent, we'll update first_bh and header_bh after modifying the old | |
3644 | * extent. | |
3645 | * | |
3646 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3647 | */ |
3648 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3649 | handle_t *handle, | |
41cb8148 JB |
3650 | struct ocfs2_xattr_bucket *first, |
3651 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3652 | u64 new_blkno, |
01225596 TM |
3653 | u32 num_clusters, |
3654 | u32 *first_hash) | |
3655 | { | |
c58b6032 | 3656 | int ret; |
41cb8148 JB |
3657 | struct super_block *sb = inode->i_sb; |
3658 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3659 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3660 | int to_move = num_buckets / 2; |
c58b6032 | 3661 | u64 src_blkno; |
41cb8148 JB |
3662 | u64 last_cluster_blkno = bucket_blkno(first) + |
3663 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3664 | |
41cb8148 JB |
3665 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3666 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3667 | |
01225596 | 3668 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3669 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3670 | |
41cb8148 | 3671 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3672 | last_cluster_blkno, new_blkno, |
3673 | to_move, first_hash); | |
01225596 TM |
3674 | if (ret) { |
3675 | mlog_errno(ret); | |
3676 | goto out; | |
3677 | } | |
3678 | ||
c58b6032 JB |
3679 | /* This is the first bucket that got moved */ |
3680 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3681 | |
b5c03e74 | 3682 | /* |
c58b6032 | 3683 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3684 | * update first and target. |
b5c03e74 | 3685 | */ |
41cb8148 | 3686 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3687 | /* Find the block for the new target bucket */ |
3688 | src_blkno = new_blkno + | |
41cb8148 JB |
3689 | (bucket_blkno(target) - src_blkno); |
3690 | ||
3691 | ocfs2_xattr_bucket_relse(first); | |
3692 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3693 | |
b5c03e74 | 3694 | /* |
c58b6032 | 3695 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3696 | * journal from ocfs2_cp_xattr_bucket(). |
3697 | */ | |
41cb8148 | 3698 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3699 | if (ret) { |
3700 | mlog_errno(ret); | |
3701 | goto out; | |
3702 | } | |
41cb8148 JB |
3703 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3704 | if (ret) | |
b5c03e74 | 3705 | mlog_errno(ret); |
01225596 | 3706 | |
01225596 TM |
3707 | } |
3708 | ||
01225596 | 3709 | out: |
01225596 TM |
3710 | return ret; |
3711 | } | |
3712 | ||
01225596 | 3713 | /* |
80bcaf34 TM |
3714 | * Find the suitable pos when we divide a bucket into 2. |
3715 | * We have to make sure the xattrs with the same hash value exist | |
3716 | * in the same bucket. | |
3717 | * | |
3718 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3719 | * place where the hash value changes. Try to find the most even split. | |
3720 | * The most common case is that all entries have different hash values, | |
3721 | * and the first check we make will find a place to split. | |
3722 | */ | |
3723 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3724 | { | |
3725 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3726 | int count = le16_to_cpu(xh->xh_count); | |
3727 | int delta, middle = count / 2; | |
3728 | ||
3729 | /* | |
3730 | * We start at the middle. Each step gets farther away in both | |
3731 | * directions. We therefore hit the change in hash value | |
3732 | * nearest to the middle. Note that this loop does not execute for | |
3733 | * count < 2. | |
3734 | */ | |
3735 | for (delta = 0; delta < middle; delta++) { | |
3736 | /* Let's check delta earlier than middle */ | |
3737 | if (cmp_xe(&entries[middle - delta - 1], | |
3738 | &entries[middle - delta])) | |
3739 | return middle - delta; | |
3740 | ||
3741 | /* For even counts, don't walk off the end */ | |
3742 | if ((middle + delta + 1) == count) | |
3743 | continue; | |
3744 | ||
3745 | /* Now try delta past middle */ | |
3746 | if (cmp_xe(&entries[middle + delta], | |
3747 | &entries[middle + delta + 1])) | |
3748 | return middle + delta + 1; | |
3749 | } | |
3750 | ||
3751 | /* Every entry had the same hash */ | |
3752 | return count; | |
3753 | } | |
3754 | ||
3755 | /* | |
3756 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3757 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3758 | * |
3759 | * Normally half of the xattrs will be moved. But we have to make | |
3760 | * sure that the xattrs with the same hash value are stored in the | |
3761 | * same bucket. If all the xattrs in this bucket have the same hash | |
3762 | * value, the new bucket will be initialized as an empty one and the | |
3763 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3764 | */ |
80bcaf34 TM |
3765 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3766 | handle_t *handle, | |
3767 | u64 blk, | |
3768 | u64 new_blk, | |
3769 | u32 *first_hash, | |
3770 | int new_bucket_head) | |
01225596 TM |
3771 | { |
3772 | int ret, i; | |
80bcaf34 | 3773 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3774 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3775 | struct ocfs2_xattr_header *xh; |
3776 | struct ocfs2_xattr_entry *xe; | |
3777 | int blocksize = inode->i_sb->s_blocksize; | |
3778 | ||
80bcaf34 | 3779 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3780 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3781 | |
ba937127 JB |
3782 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3783 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3784 | if (!s_bucket || !t_bucket) { | |
3785 | ret = -ENOMEM; | |
3786 | mlog_errno(ret); | |
3787 | goto out; | |
3788 | } | |
01225596 | 3789 | |
ba937127 | 3790 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3791 | if (ret) { |
3792 | mlog_errno(ret); | |
3793 | goto out; | |
3794 | } | |
3795 | ||
ba937127 | 3796 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3797 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3798 | if (ret) { |
3799 | mlog_errno(ret); | |
3800 | goto out; | |
3801 | } | |
3802 | ||
784b816a JB |
3803 | /* |
3804 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3805 | * there's no need to read it. | |
3806 | */ | |
ba937127 | 3807 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3808 | if (ret) { |
3809 | mlog_errno(ret); | |
3810 | goto out; | |
3811 | } | |
3812 | ||
2b656c1d JB |
3813 | /* |
3814 | * Hey, if we're overwriting t_bucket, what difference does | |
3815 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
3816 | * same part of ocfs2_cp_xattr_bucket(). | |
3817 | */ | |
ba937127 | 3818 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3819 | new_bucket_head ? |
3820 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3821 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3822 | if (ret) { | |
3823 | mlog_errno(ret); | |
3824 | goto out; | |
01225596 TM |
3825 | } |
3826 | ||
ba937127 | 3827 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3828 | count = le16_to_cpu(xh->xh_count); |
3829 | start = ocfs2_xattr_find_divide_pos(xh); | |
3830 | ||
3831 | if (start == count) { | |
3832 | xe = &xh->xh_entries[start-1]; | |
3833 | ||
3834 | /* | |
3835 | * initialized a new empty bucket here. | |
3836 | * The hash value is set as one larger than | |
3837 | * that of the last entry in the previous bucket. | |
3838 | */ | |
ba937127 JB |
3839 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3840 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3841 | |
ba937127 | 3842 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3843 | xh->xh_free_start = cpu_to_le16(blocksize); |
3844 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3845 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3846 | ||
3847 | goto set_num_buckets; | |
3848 | } | |
3849 | ||
01225596 | 3850 | /* copy the whole bucket to the new first. */ |
ba937127 | 3851 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3852 | |
3853 | /* update the new bucket. */ | |
ba937127 | 3854 | xh = bucket_xh(t_bucket); |
01225596 TM |
3855 | |
3856 | /* | |
3857 | * Calculate the total name/value len and xh_free_start for | |
3858 | * the old bucket first. | |
3859 | */ | |
3860 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3861 | name_value_len = 0; | |
3862 | for (i = 0; i < start; i++) { | |
3863 | xe = &xh->xh_entries[i]; | |
3864 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3865 | if (ocfs2_xattr_is_local(xe)) | |
3866 | xe_len += | |
3867 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3868 | else | |
3869 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3870 | name_value_len += xe_len; | |
3871 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3872 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3873 | } | |
3874 | ||
3875 | /* | |
3876 | * Now begin the modification to the new bucket. | |
3877 | * | |
3878 | * In the new bucket, We just move the xattr entry to the beginning | |
3879 | * and don't touch the name/value. So there will be some holes in the | |
3880 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3881 | * called. | |
3882 | */ | |
3883 | xe = &xh->xh_entries[start]; | |
3884 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3885 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3886 | (int)((char *)xe - (char *)xh), |
3887 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3888 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3889 | xe = &xh->xh_entries[count - start]; | |
3890 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3891 | memset((char *)xe, 0, len); | |
3892 | ||
3893 | le16_add_cpu(&xh->xh_count, -start); | |
3894 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3895 | ||
3896 | /* Calculate xh_free_start for the new bucket. */ | |
3897 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3898 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3899 | xe = &xh->xh_entries[i]; | |
3900 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3901 | if (ocfs2_xattr_is_local(xe)) | |
3902 | xe_len += | |
3903 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3904 | else | |
3905 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3906 | if (le16_to_cpu(xe->xe_name_offset) < | |
3907 | le16_to_cpu(xh->xh_free_start)) | |
3908 | xh->xh_free_start = xe->xe_name_offset; | |
3909 | } | |
3910 | ||
80bcaf34 | 3911 | set_num_buckets: |
01225596 TM |
3912 | /* set xh->xh_num_buckets for the new xh. */ |
3913 | if (new_bucket_head) | |
3914 | xh->xh_num_buckets = cpu_to_le16(1); | |
3915 | else | |
3916 | xh->xh_num_buckets = 0; | |
3917 | ||
ba937127 | 3918 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3919 | |
3920 | /* store the first_hash of the new bucket. */ | |
3921 | if (first_hash) | |
3922 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3923 | ||
3924 | /* | |
80bcaf34 TM |
3925 | * Now only update the 1st block of the old bucket. If we |
3926 | * just added a new empty bucket, there is no need to modify | |
3927 | * it. | |
01225596 | 3928 | */ |
80bcaf34 TM |
3929 | if (start == count) |
3930 | goto out; | |
3931 | ||
ba937127 | 3932 | xh = bucket_xh(s_bucket); |
01225596 TM |
3933 | memset(&xh->xh_entries[start], 0, |
3934 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3935 | xh->xh_count = cpu_to_le16(start); | |
3936 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3937 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3938 | ||
ba937127 | 3939 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3940 | |
3941 | out: | |
ba937127 JB |
3942 | ocfs2_xattr_bucket_free(s_bucket); |
3943 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3944 | |
3945 | return ret; | |
3946 | } | |
3947 | ||
3948 | /* | |
3949 | * Copy xattr from one bucket to another bucket. | |
3950 | * | |
3951 | * The caller must make sure that the journal transaction | |
3952 | * has enough space for journaling. | |
3953 | */ | |
3954 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3955 | handle_t *handle, | |
3956 | u64 s_blkno, | |
3957 | u64 t_blkno, | |
3958 | int t_is_new) | |
3959 | { | |
4980c6da | 3960 | int ret; |
ba937127 | 3961 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3962 | |
3963 | BUG_ON(s_blkno == t_blkno); | |
3964 | ||
3965 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3966 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3967 | t_is_new); | |
01225596 | 3968 | |
ba937127 JB |
3969 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3970 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3971 | if (!s_bucket || !t_bucket) { | |
3972 | ret = -ENOMEM; | |
3973 | mlog_errno(ret); | |
3974 | goto out; | |
3975 | } | |
92de109a | 3976 | |
ba937127 | 3977 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
3978 | if (ret) |
3979 | goto out; | |
3980 | ||
784b816a JB |
3981 | /* |
3982 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3983 | * there's no need to read it. | |
3984 | */ | |
ba937127 | 3985 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3986 | if (ret) |
3987 | goto out; | |
3988 | ||
2b656c1d JB |
3989 | /* |
3990 | * Hey, if we're overwriting t_bucket, what difference does | |
3991 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
3992 | * cluster to fill, we came here from |
3993 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
3994 | * ACCESS_CREATE is required. But we also might have moved data | |
3995 | * out of t_bucket before extending back into it. | |
3996 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
3997 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
3998 | * and copied out the end of the old extent. Then it re-extends |
3999 | * the old extent back to create space for new xattrs. That's | |
4000 | * how we get here, and the bucket isn't really new. | |
4001 | */ | |
ba937127 | 4002 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4003 | t_is_new ? |
4004 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4005 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4006 | if (ret) | |
4007 | goto out; | |
01225596 | 4008 | |
ba937127 JB |
4009 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4010 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4011 | |
4012 | out: | |
ba937127 JB |
4013 | ocfs2_xattr_bucket_free(t_bucket); |
4014 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4015 | |
4016 | return ret; | |
4017 | } | |
4018 | ||
4019 | /* | |
874d65af JB |
4020 | * src_blk points to the start of an existing extent. last_blk points to |
4021 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4022 | * extent. We copy the buckets from the cluster at last_blk to the new |
4023 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4024 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4025 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4026 | * by the same amount. | |
01225596 | 4027 | */ |
54ecb6b6 JB |
4028 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4029 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4030 | unsigned int start_bucket, | |
4031 | u32 *first_hash) | |
01225596 TM |
4032 | { |
4033 | int i, ret, credits; | |
4034 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4035 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4036 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4037 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4038 | |
874d65af JB |
4039 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4040 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4041 | |
54ecb6b6 JB |
4042 | BUG_ON(start_bucket >= num_buckets); |
4043 | if (start_bucket) { | |
4044 | num_buckets -= start_bucket; | |
4045 | last_blk += (start_bucket * blks_per_bucket); | |
4046 | } | |
4047 | ||
15d60929 JB |
4048 | /* The first bucket of the original extent */ |
4049 | old_first = ocfs2_xattr_bucket_new(inode); | |
4050 | /* The first bucket of the new extent */ | |
4051 | new_first = ocfs2_xattr_bucket_new(inode); | |
4052 | if (!old_first || !new_first) { | |
4053 | ret = -ENOMEM; | |
4054 | mlog_errno(ret); | |
4055 | goto out; | |
4056 | } | |
4057 | ||
874d65af | 4058 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4059 | if (ret) { |
4060 | mlog_errno(ret); | |
4061 | goto out; | |
4062 | } | |
4063 | ||
01225596 | 4064 | /* |
54ecb6b6 JB |
4065 | * We need to update the first bucket of the old extent and all |
4066 | * the buckets going to the new extent. | |
01225596 | 4067 | */ |
54ecb6b6 JB |
4068 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4069 | handle->h_buffer_credits; | |
01225596 TM |
4070 | ret = ocfs2_extend_trans(handle, credits); |
4071 | if (ret) { | |
4072 | mlog_errno(ret); | |
4073 | goto out; | |
4074 | } | |
4075 | ||
15d60929 JB |
4076 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4077 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4078 | if (ret) { |
4079 | mlog_errno(ret); | |
4080 | goto out; | |
4081 | } | |
4082 | ||
4083 | for (i = 0; i < num_buckets; i++) { | |
4084 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4085 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4086 | to_blk + (i * blks_per_bucket), |
4087 | 1); | |
01225596 TM |
4088 | if (ret) { |
4089 | mlog_errno(ret); | |
4090 | goto out; | |
4091 | } | |
01225596 TM |
4092 | } |
4093 | ||
15d60929 JB |
4094 | /* |
4095 | * Get the new bucket ready before we dirty anything | |
4096 | * (This actually shouldn't fail, because we already dirtied | |
4097 | * it once in ocfs2_cp_xattr_bucket()). | |
4098 | */ | |
4099 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4100 | if (ret) { | |
01225596 TM |
4101 | mlog_errno(ret); |
4102 | goto out; | |
4103 | } | |
15d60929 JB |
4104 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4105 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4106 | if (ret) { |
4107 | mlog_errno(ret); | |
4108 | goto out; | |
4109 | } | |
4110 | ||
15d60929 JB |
4111 | /* Now update the headers */ |
4112 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4113 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4114 | |
15d60929 JB |
4115 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4116 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4117 | |
4118 | if (first_hash) | |
15d60929 JB |
4119 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4120 | ||
01225596 | 4121 | out: |
15d60929 JB |
4122 | ocfs2_xattr_bucket_free(new_first); |
4123 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4124 | return ret; |
4125 | } | |
4126 | ||
4127 | /* | |
80bcaf34 | 4128 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4129 | * This function should only be called when bucket size == cluster size. |
4130 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4131 | */ | |
80bcaf34 TM |
4132 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4133 | handle_t *handle, | |
4134 | u64 prev_blk, | |
4135 | u64 new_blk, | |
4136 | u32 *first_hash) | |
01225596 TM |
4137 | { |
4138 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4139 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4140 | |
4141 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4142 | ||
4143 | ret = ocfs2_extend_trans(handle, credits); | |
4144 | if (ret) { | |
4145 | mlog_errno(ret); | |
4146 | return ret; | |
4147 | } | |
4148 | ||
4149 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4150 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4151 | new_blk, first_hash, 1); | |
01225596 TM |
4152 | } |
4153 | ||
4154 | /* | |
4155 | * Move some xattrs from the old cluster to the new one since they are not | |
4156 | * contiguous in ocfs2 xattr tree. | |
4157 | * | |
4158 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4159 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4160 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4161 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4162 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4163 | * to extend the insert bucket. | |
4164 | * | |
4165 | * The problem is how much xattr should we move to the new one and when should | |
4166 | * we update first_bh and header_bh? | |
4167 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4168 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4169 | * update the first_bh and header_bh if the insert bucket has been moved | |
4170 | * to the new cluster. | |
4171 | * 2. If cluster_size == bucket_size: | |
4172 | * a) If the previous extent rec has more than one cluster and the insert | |
4173 | * place isn't in the last cluster, copy the entire last cluster to the | |
4174 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4175 | * since they will not be moved into the new cluster. | |
4176 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4177 | * the new one. And we set the extend flag to zero if the insert place is | |
4178 | * moved into the new allocated cluster since no extend is needed. | |
4179 | */ | |
4180 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4181 | handle_t *handle, | |
012ee910 JB |
4182 | struct ocfs2_xattr_bucket *first, |
4183 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4184 | u64 new_blk, |
01225596 TM |
4185 | u32 prev_clusters, |
4186 | u32 *v_start, | |
4187 | int *extend) | |
4188 | { | |
92cf3adf | 4189 | int ret; |
01225596 TM |
4190 | |
4191 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4192 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4193 | (unsigned long long)new_blk); |
01225596 | 4194 | |
41cb8148 | 4195 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4196 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4197 | handle, | |
41cb8148 | 4198 | first, target, |
01225596 | 4199 | new_blk, |
01225596 TM |
4200 | prev_clusters, |
4201 | v_start); | |
012ee910 | 4202 | if (ret) |
41cb8148 | 4203 | mlog_errno(ret); |
41cb8148 | 4204 | } else { |
92cf3adf JB |
4205 | /* The start of the last cluster in the first extent */ |
4206 | u64 last_blk = bucket_blkno(first) + | |
4207 | ((prev_clusters - 1) * | |
4208 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4209 | |
012ee910 | 4210 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4211 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4212 | bucket_blkno(first), |
54ecb6b6 | 4213 | last_blk, new_blk, 0, |
01225596 | 4214 | v_start); |
012ee910 JB |
4215 | if (ret) |
4216 | mlog_errno(ret); | |
4217 | } else { | |
80bcaf34 TM |
4218 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4219 | last_blk, new_blk, | |
4220 | v_start); | |
012ee910 JB |
4221 | if (ret) |
4222 | mlog_errno(ret); | |
01225596 | 4223 | |
92cf3adf | 4224 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4225 | *extend = 0; |
4226 | } | |
4227 | } | |
4228 | ||
4229 | return ret; | |
4230 | } | |
4231 | ||
4232 | /* | |
4233 | * Add a new cluster for xattr storage. | |
4234 | * | |
4235 | * If the new cluster is contiguous with the previous one, it will be | |
4236 | * appended to the same extent record, and num_clusters will be updated. | |
4237 | * If not, we will insert a new extent for it and move some xattrs in | |
4238 | * the last cluster into the new allocated one. | |
4239 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4240 | * lose the benefits of hashing because we'll have to search large leaves. | |
4241 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4242 | * if it's bigger). | |
4243 | * | |
4244 | * first_bh is the first block of the previous extent rec and header_bh | |
4245 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4246 | * when the header_bh is moved into the new cluster. | |
4247 | */ | |
4248 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4249 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4250 | struct ocfs2_xattr_bucket *first, |
4251 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4252 | u32 *num_clusters, |
4253 | u32 prev_cpos, | |
78f30c31 TM |
4254 | int *extend, |
4255 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4256 | { |
85db90e7 | 4257 | int ret; |
01225596 TM |
4258 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4259 | u32 prev_clusters = *num_clusters; | |
4260 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4261 | u64 block; | |
85db90e7 | 4262 | handle_t *handle = ctxt->handle; |
01225596 | 4263 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4264 | struct ocfs2_extent_tree et; |
01225596 TM |
4265 | |
4266 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4267 | "previous xattr blkno = %llu\n", | |
4268 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4269 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4270 | |
8d6220d6 | 4271 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c | 4272 | |
0cf2f763 | 4273 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4274 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4275 | if (ret < 0) { |
4276 | mlog_errno(ret); | |
4277 | goto leave; | |
4278 | } | |
4279 | ||
78f30c31 | 4280 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4281 | clusters_to_add, &bit_off, &num_bits); |
4282 | if (ret < 0) { | |
4283 | if (ret != -ENOSPC) | |
4284 | mlog_errno(ret); | |
4285 | goto leave; | |
4286 | } | |
4287 | ||
4288 | BUG_ON(num_bits > clusters_to_add); | |
4289 | ||
4290 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4291 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4292 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4293 | ||
ed29c0ca | 4294 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4295 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4296 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4297 | /* | |
4298 | * If this cluster is contiguous with the old one and | |
4299 | * adding this new cluster, we don't surpass the limit of | |
4300 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4301 | * initialized and used like other buckets in the previous | |
4302 | * cluster. | |
4303 | * So add it as a contiguous one. The caller will handle | |
4304 | * its init process. | |
4305 | */ | |
4306 | v_start = prev_cpos + prev_clusters; | |
4307 | *num_clusters = prev_clusters + num_bits; | |
4308 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4309 | num_bits); | |
4310 | } else { | |
4311 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4312 | handle, | |
012ee910 JB |
4313 | first, |
4314 | target, | |
01225596 | 4315 | block, |
01225596 TM |
4316 | prev_clusters, |
4317 | &v_start, | |
4318 | extend); | |
4319 | if (ret) { | |
4320 | mlog_errno(ret); | |
4321 | goto leave; | |
4322 | } | |
4323 | } | |
4324 | ||
4325 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4326 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c | 4327 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
78f30c31 | 4328 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4329 | if (ret < 0) { |
4330 | mlog_errno(ret); | |
4331 | goto leave; | |
4332 | } | |
4333 | ||
4334 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4335 | if (ret < 0) |
01225596 | 4336 | mlog_errno(ret); |
01225596 TM |
4337 | |
4338 | leave: | |
01225596 TM |
4339 | return ret; |
4340 | } | |
4341 | ||
4342 | /* | |
92de109a JB |
4343 | * We are given an extent. 'first' is the bucket at the very front of |
4344 | * the extent. The extent has space for an additional bucket past | |
4345 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4346 | * of the target bucket. We wish to shift every bucket past the target | |
4347 | * down one, filling in that additional space. When we get back to the | |
4348 | * target, we split the target between itself and the now-empty bucket | |
4349 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4350 | */ |
4351 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4352 | handle_t *handle, |
92de109a JB |
4353 | struct ocfs2_xattr_bucket *first, |
4354 | u64 target_blk, | |
01225596 TM |
4355 | u32 num_clusters) |
4356 | { | |
4357 | int ret, credits; | |
4358 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4359 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4360 | u64 end_blk; |
4361 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4362 | |
4363 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4364 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4365 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4366 | |
92de109a JB |
4367 | /* The extent must have room for an additional bucket */ |
4368 | BUG_ON(new_bucket >= | |
4369 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4370 | |
92de109a JB |
4371 | /* end_blk points to the last existing bucket */ |
4372 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4373 | |
4374 | /* | |
92de109a JB |
4375 | * end_blk is the start of the last existing bucket. |
4376 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4377 | * every bucket after it up to, but not including, the last | |
4378 | * existing bucket. Then we add the last existing bucket, the | |
4379 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4380 | */ |
92de109a | 4381 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4382 | handle->h_buffer_credits; |
4383 | ret = ocfs2_extend_trans(handle, credits); | |
4384 | if (ret) { | |
01225596 TM |
4385 | mlog_errno(ret); |
4386 | goto out; | |
4387 | } | |
4388 | ||
92de109a JB |
4389 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4390 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4391 | if (ret) { |
4392 | mlog_errno(ret); | |
85db90e7 | 4393 | goto out; |
01225596 TM |
4394 | } |
4395 | ||
92de109a | 4396 | while (end_blk != target_blk) { |
01225596 TM |
4397 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4398 | end_blk + blk_per_bucket, 0); | |
4399 | if (ret) | |
85db90e7 | 4400 | goto out; |
01225596 TM |
4401 | end_blk -= blk_per_bucket; |
4402 | } | |
4403 | ||
92de109a JB |
4404 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4405 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4406 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4407 | |
92de109a JB |
4408 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4409 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4410 | |
01225596 TM |
4411 | out: |
4412 | return ret; | |
4413 | } | |
4414 | ||
4415 | /* | |
91f2033f JB |
4416 | * Add new xattr bucket in an extent record and adjust the buckets |
4417 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4418 | * bucket we want to insert into. | |
01225596 | 4419 | * |
91f2033f JB |
4420 | * In the easy case, we will move all the buckets after target down by |
4421 | * one. Half of target's xattrs will be moved to the next bucket. | |
4422 | * | |
4423 | * If current cluster is full, we'll allocate a new one. This may not | |
4424 | * be contiguous. The underlying calls will make sure that there is | |
4425 | * space for the insert, shifting buckets around if necessary. | |
4426 | * 'target' may be moved by those calls. | |
01225596 TM |
4427 | */ |
4428 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4429 | struct buffer_head *xb_bh, | |
91f2033f | 4430 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4431 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4432 | { |
01225596 TM |
4433 | struct ocfs2_xattr_block *xb = |
4434 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4435 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4436 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4437 | u32 name_hash = |
4438 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4439 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4440 | int ret, num_buckets, extend = 1; |
4441 | u64 p_blkno; | |
4442 | u32 e_cpos, num_clusters; | |
92de109a | 4443 | /* The bucket at the front of the extent */ |
91f2033f | 4444 | struct ocfs2_xattr_bucket *first; |
01225596 | 4445 | |
91f2033f JB |
4446 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4447 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4448 | |
ed29c0ca | 4449 | /* The first bucket of the original extent */ |
92de109a | 4450 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4451 | if (!first) { |
92de109a JB |
4452 | ret = -ENOMEM; |
4453 | mlog_errno(ret); | |
4454 | goto out; | |
4455 | } | |
4456 | ||
01225596 TM |
4457 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4458 | &num_clusters, el); | |
4459 | if (ret) { | |
4460 | mlog_errno(ret); | |
4461 | goto out; | |
4462 | } | |
4463 | ||
ed29c0ca | 4464 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4465 | if (ret) { |
4466 | mlog_errno(ret); | |
4467 | goto out; | |
4468 | } | |
4469 | ||
ed29c0ca JB |
4470 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4471 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4472 | /* | |
4473 | * This can move first+target if the target bucket moves | |
4474 | * to the new extent. | |
4475 | */ | |
01225596 TM |
4476 | ret = ocfs2_add_new_xattr_cluster(inode, |
4477 | xb_bh, | |
ed29c0ca JB |
4478 | first, |
4479 | target, | |
01225596 TM |
4480 | &num_clusters, |
4481 | e_cpos, | |
78f30c31 TM |
4482 | &extend, |
4483 | ctxt); | |
01225596 TM |
4484 | if (ret) { |
4485 | mlog_errno(ret); | |
4486 | goto out; | |
4487 | } | |
4488 | } | |
4489 | ||
92de109a | 4490 | if (extend) { |
01225596 | 4491 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4492 | ctxt->handle, |
ed29c0ca JB |
4493 | first, |
4494 | bucket_blkno(target), | |
01225596 | 4495 | num_clusters); |
92de109a JB |
4496 | if (ret) |
4497 | mlog_errno(ret); | |
4498 | } | |
4499 | ||
01225596 | 4500 | out: |
92de109a | 4501 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4502 | |
01225596 TM |
4503 | return ret; |
4504 | } | |
4505 | ||
4506 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4507 | struct ocfs2_xattr_bucket *bucket, | |
4508 | int offs) | |
4509 | { | |
4510 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4511 | ||
4512 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4513 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4514 | } |
4515 | ||
4516 | /* | |
4517 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4518 | * |
4519 | * Note: "local" indicates the real data's locality. So we can't | |
4520 | * just its bucket locality by its length. | |
4521 | */ | |
4522 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4523 | struct ocfs2_xattr_info *xi, | |
4524 | struct ocfs2_xattr_search *xs, | |
4525 | u32 name_hash, | |
5a095611 | 4526 | int local) |
01225596 TM |
4527 | { |
4528 | struct ocfs2_xattr_entry *last, *xe; | |
4529 | int name_len = strlen(xi->name); | |
4530 | struct ocfs2_xattr_header *xh = xs->header; | |
4531 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4532 | size_t blocksize = inode->i_sb->s_blocksize; | |
4533 | char *val; | |
4534 | size_t offs, size, new_size; | |
4535 | ||
4536 | last = &xh->xh_entries[count]; | |
4537 | if (!xs->not_found) { | |
4538 | xe = xs->here; | |
4539 | offs = le16_to_cpu(xe->xe_name_offset); | |
4540 | if (ocfs2_xattr_is_local(xe)) | |
4541 | size = OCFS2_XATTR_SIZE(name_len) + | |
4542 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4543 | else | |
4544 | size = OCFS2_XATTR_SIZE(name_len) + | |
4545 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4546 | ||
4547 | /* | |
4548 | * If the new value will be stored outside, xi->value has been | |
4549 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4550 | * goes with xi->value_len, so we can set new_size safely here. | |
4551 | * See ocfs2_xattr_set_in_bucket. | |
4552 | */ | |
4553 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4554 | OCFS2_XATTR_SIZE(xi->value_len); | |
4555 | ||
4556 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4557 | if (xi->value) { | |
4558 | if (new_size > size) | |
4559 | goto set_new_name_value; | |
4560 | ||
4561 | /* Now replace the old value with new one. */ | |
4562 | if (local) | |
4563 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4564 | else | |
4565 | xe->xe_value_size = 0; | |
4566 | ||
4567 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4568 | xs->bucket, offs); |
01225596 TM |
4569 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4570 | size - OCFS2_XATTR_SIZE(name_len)); | |
4571 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4572 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4573 | xi->value, xi->value_len); | |
4574 | ||
4575 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4576 | ocfs2_xattr_set_local(xe, local); | |
4577 | return; | |
4578 | } else { | |
5a095611 TM |
4579 | /* |
4580 | * Remove the old entry if there is more than one. | |
4581 | * We don't remove the last entry so that we can | |
4582 | * use it to indicate the hash value of the empty | |
4583 | * bucket. | |
4584 | */ | |
01225596 | 4585 | last -= 1; |
01225596 | 4586 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4587 | if (xh->xh_count) { |
4588 | memmove(xe, xe + 1, | |
4589 | (void *)last - (void *)xe); | |
4590 | memset(last, 0, | |
4591 | sizeof(struct ocfs2_xattr_entry)); | |
4592 | } else | |
4593 | xh->xh_free_start = | |
4594 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4595 | ||
01225596 TM |
4596 | return; |
4597 | } | |
4598 | } else { | |
4599 | /* find a new entry for insert. */ | |
4600 | int low = 0, high = count - 1, tmp; | |
4601 | struct ocfs2_xattr_entry *tmp_xe; | |
4602 | ||
5a095611 | 4603 | while (low <= high && count) { |
01225596 TM |
4604 | tmp = (low + high) / 2; |
4605 | tmp_xe = &xh->xh_entries[tmp]; | |
4606 | ||
4607 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4608 | low = tmp + 1; | |
4609 | else if (name_hash < | |
4610 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4611 | high = tmp - 1; | |
06b240d8 TM |
4612 | else { |
4613 | low = tmp; | |
01225596 | 4614 | break; |
06b240d8 | 4615 | } |
01225596 TM |
4616 | } |
4617 | ||
4618 | xe = &xh->xh_entries[low]; | |
4619 | if (low != count) | |
4620 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4621 | ||
4622 | le16_add_cpu(&xh->xh_count, 1); | |
4623 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4624 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4625 | xe->xe_name_len = name_len; | |
4626 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4627 | } | |
4628 | ||
4629 | set_new_name_value: | |
4630 | /* Insert the new name+value. */ | |
4631 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4632 | ||
4633 | /* | |
4634 | * We must make sure that the name/value pair | |
4635 | * exists in the same block. | |
4636 | */ | |
4637 | offs = le16_to_cpu(xh->xh_free_start); | |
4638 | start = offs - size; | |
4639 | ||
4640 | if (start >> inode->i_sb->s_blocksize_bits != | |
4641 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4642 | offs = offs - offs % blocksize; | |
4643 | xh->xh_free_start = cpu_to_le16(offs); | |
4644 | } | |
4645 | ||
ba937127 | 4646 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4647 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4648 | ||
4649 | memset(val, 0, size); | |
4650 | memcpy(val, xi->name, name_len); | |
4651 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4652 | ||
4653 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4654 | ocfs2_xattr_set_local(xe, local); | |
4655 | xs->here = xe; | |
4656 | le16_add_cpu(&xh->xh_free_start, -size); | |
4657 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4658 | ||
4659 | return; | |
4660 | } | |
4661 | ||
01225596 TM |
4662 | /* |
4663 | * Set the xattr entry in the specified bucket. | |
4664 | * The bucket is indicated by xs->bucket and it should have the enough | |
4665 | * space for the xattr insertion. | |
4666 | */ | |
4667 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4668 | handle_t *handle, |
01225596 TM |
4669 | struct ocfs2_xattr_info *xi, |
4670 | struct ocfs2_xattr_search *xs, | |
4671 | u32 name_hash, | |
5a095611 | 4672 | int local) |
01225596 | 4673 | { |
1224be02 | 4674 | int ret; |
02dbf38d | 4675 | u64 blkno; |
01225596 | 4676 | |
ff1ec20e MF |
4677 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4678 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4679 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4680 | |
ba937127 | 4681 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4682 | blkno = bucket_blkno(xs->bucket); |
4683 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4684 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4685 | if (ret) { |
4686 | mlog_errno(ret); | |
4687 | goto out; | |
4688 | } | |
4689 | } | |
4690 | ||
ba937127 | 4691 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4692 | OCFS2_JOURNAL_ACCESS_WRITE); |
4693 | if (ret < 0) { | |
4694 | mlog_errno(ret); | |
4695 | goto out; | |
01225596 TM |
4696 | } |
4697 | ||
5a095611 | 4698 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4699 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4700 | |
01225596 | 4701 | out: |
01225596 TM |
4702 | return ret; |
4703 | } | |
4704 | ||
01225596 TM |
4705 | /* |
4706 | * Truncate the specified xe_off entry in xattr bucket. | |
4707 | * bucket is indicated by header_bh and len is the new length. | |
4708 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4709 | * | |
4710 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4711 | */ | |
4712 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4713 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4714 | int xe_off, |
78f30c31 TM |
4715 | int len, |
4716 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4717 | { |
4718 | int ret, offset; | |
4719 | u64 value_blk; | |
01225596 | 4720 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4721 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4722 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4723 | struct ocfs2_xattr_value_buf vb = { |
4724 | .vb_access = ocfs2_journal_access, | |
4725 | }; | |
01225596 TM |
4726 | |
4727 | xe = &xh->xh_entries[xe_off]; | |
4728 | ||
4729 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4730 | ||
4731 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4732 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4733 | ||
4734 | value_blk = offset / blocksize; | |
4735 | ||
4736 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4737 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4738 | |
b3e5d379 JB |
4739 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4740 | BUG_ON(!vb.vb_bh); | |
01225596 | 4741 | |
b3e5d379 JB |
4742 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4743 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4744 | |
548b0f22 JB |
4745 | /* |
4746 | * From here on out we have to dirty the bucket. The generic | |
4747 | * value calls only modify one of the bucket's bhs, but we need | |
4748 | * to send the bucket at once. So if they error, they *could* have | |
4749 | * modified something. We have to assume they did, and dirty | |
4750 | * the whole bucket. This leaves us in a consistent state. | |
4751 | */ | |
4752 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4753 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4754 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4755 | if (ret) { |
4756 | mlog_errno(ret); | |
554e7f9e TM |
4757 | goto out; |
4758 | } | |
4759 | ||
4760 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
4761 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4762 | if (ret) { | |
4763 | mlog_errno(ret); | |
4764 | goto out; | |
01225596 TM |
4765 | } |
4766 | ||
548b0f22 JB |
4767 | xe->xe_value_size = cpu_to_le64(len); |
4768 | ||
548b0f22 JB |
4769 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
4770 | ||
01225596 | 4771 | out: |
01225596 TM |
4772 | return ret; |
4773 | } | |
4774 | ||
4775 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4776 | struct ocfs2_xattr_search *xs, |
4777 | int len, | |
4778 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4779 | { |
4780 | int ret, offset; | |
4781 | struct ocfs2_xattr_entry *xe = xs->here; | |
4782 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4783 | ||
ba937127 | 4784 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4785 | |
4786 | offset = xe - xh->xh_entries; | |
548b0f22 | 4787 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 4788 | offset, len, ctxt); |
01225596 TM |
4789 | if (ret) |
4790 | mlog_errno(ret); | |
4791 | ||
4792 | return ret; | |
4793 | } | |
4794 | ||
4795 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4796 | handle_t *handle, |
01225596 TM |
4797 | struct ocfs2_xattr_search *xs, |
4798 | char *val, | |
4799 | int value_len) | |
4800 | { | |
712e53e4 | 4801 | int ret, offset, block_off; |
01225596 TM |
4802 | struct ocfs2_xattr_value_root *xv; |
4803 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
4804 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
4805 | void *base; | |
01225596 TM |
4806 | |
4807 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4808 | ||
712e53e4 TM |
4809 | ret = ocfs2_xattr_bucket_get_name_value(inode, xh, |
4810 | xe - xh->xh_entries, | |
4811 | &block_off, | |
4812 | &offset); | |
4813 | if (ret) { | |
4814 | mlog_errno(ret); | |
4815 | goto out; | |
4816 | } | |
01225596 | 4817 | |
712e53e4 TM |
4818 | base = bucket_block(xs->bucket, block_off); |
4819 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
4820 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 4821 | |
712e53e4 TM |
4822 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
4823 | xv, val, value_len); | |
4824 | if (ret) | |
4825 | mlog_errno(ret); | |
4826 | out: | |
4827 | return ret; | |
01225596 TM |
4828 | } |
4829 | ||
01225596 TM |
4830 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4831 | struct buffer_head *root_bh, | |
4832 | u64 blkno, | |
4833 | u32 cpos, | |
4834 | u32 len) | |
4835 | { | |
4836 | int ret; | |
4837 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4838 | struct inode *tl_inode = osb->osb_tl_inode; | |
4839 | handle_t *handle; | |
4840 | struct ocfs2_xattr_block *xb = | |
4841 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4842 | struct ocfs2_alloc_context *meta_ac = NULL; |
4843 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4844 | struct ocfs2_extent_tree et; |
4845 | ||
8d6220d6 | 4846 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4847 | |
4848 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4849 | ||
4850 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4851 | cpos, len, (unsigned long long)blkno); | |
4852 | ||
8cb471e8 JB |
4853 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
4854 | len); | |
01225596 | 4855 | |
f99b9b7c | 4856 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4857 | if (ret) { |
4858 | mlog_errno(ret); | |
4859 | return ret; | |
4860 | } | |
4861 | ||
4862 | mutex_lock(&tl_inode->i_mutex); | |
4863 | ||
4864 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4865 | ret = __ocfs2_flush_truncate_log(osb); | |
4866 | if (ret < 0) { | |
4867 | mlog_errno(ret); | |
4868 | goto out; | |
4869 | } | |
4870 | } | |
4871 | ||
a90714c1 | 4872 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 4873 | if (IS_ERR(handle)) { |
01225596 TM |
4874 | ret = -ENOMEM; |
4875 | mlog_errno(ret); | |
4876 | goto out; | |
4877 | } | |
4878 | ||
0cf2f763 | 4879 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4880 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4881 | if (ret) { |
4882 | mlog_errno(ret); | |
4883 | goto out_commit; | |
4884 | } | |
4885 | ||
f99b9b7c JB |
4886 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4887 | &dealloc); | |
01225596 TM |
4888 | if (ret) { |
4889 | mlog_errno(ret); | |
4890 | goto out_commit; | |
4891 | } | |
4892 | ||
4893 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4894 | ||
4895 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4896 | if (ret) { | |
4897 | mlog_errno(ret); | |
4898 | goto out_commit; | |
4899 | } | |
4900 | ||
4901 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4902 | if (ret) | |
4903 | mlog_errno(ret); | |
4904 | ||
4905 | out_commit: | |
4906 | ocfs2_commit_trans(osb, handle); | |
4907 | out: | |
4908 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4909 | ||
4910 | mutex_unlock(&tl_inode->i_mutex); | |
4911 | ||
4912 | if (meta_ac) | |
4913 | ocfs2_free_alloc_context(meta_ac); | |
4914 | ||
4915 | ocfs2_run_deallocs(osb, &dealloc); | |
4916 | ||
4917 | return ret; | |
4918 | } | |
4919 | ||
01225596 | 4920 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 4921 | handle_t *handle, |
01225596 TM |
4922 | struct ocfs2_xattr_search *xs) |
4923 | { | |
ba937127 | 4924 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4925 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4926 | le16_to_cpu(xh->xh_count) - 1]; | |
4927 | int ret = 0; | |
4928 | ||
ba937127 | 4929 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4930 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4931 | if (ret) { |
4932 | mlog_errno(ret); | |
85db90e7 | 4933 | return; |
01225596 TM |
4934 | } |
4935 | ||
4936 | /* Remove the old entry. */ | |
4937 | memmove(xs->here, xs->here + 1, | |
4938 | (void *)last - (void *)xs->here); | |
4939 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4940 | le16_add_cpu(&xh->xh_count, -1); | |
4941 | ||
ba937127 | 4942 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
4943 | } |
4944 | ||
4945 | /* | |
4946 | * Set the xattr name/value in the bucket specified in xs. | |
4947 | * | |
4948 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4949 | * we divide the whole process into 3 steps: | |
4950 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4951 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4952 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4953 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4954 | * to free the xattr we allocated in set. | |
4955 | */ | |
4956 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4957 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4958 | struct ocfs2_xattr_search *xs, |
4959 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4960 | { |
5a095611 | 4961 | int ret, local = 1; |
01225596 TM |
4962 | size_t value_len; |
4963 | char *val = (char *)xi->value; | |
4964 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4965 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4966 | strlen(xi->name)); | |
01225596 TM |
4967 | |
4968 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4969 | /* | |
4970 | * We need to truncate the xattr storage first. | |
4971 | * | |
4972 | * If both the old and new value are stored to | |
4973 | * outside block, we only need to truncate | |
4974 | * the storage and then set the value outside. | |
4975 | * | |
4976 | * If the new value should be stored within block, | |
4977 | * we should free all the outside block first and | |
4978 | * the modification to the xattr block will be done | |
4979 | * by following steps. | |
4980 | */ | |
4981 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4982 | value_len = xi->value_len; | |
4983 | else | |
4984 | value_len = 0; | |
4985 | ||
4986 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
4987 | value_len, |
4988 | ctxt); | |
01225596 TM |
4989 | if (ret) |
4990 | goto out; | |
4991 | ||
4992 | if (value_len) | |
4993 | goto set_value_outside; | |
4994 | } | |
4995 | ||
4996 | value_len = xi->value_len; | |
4997 | /* So we have to handle the inside block change now. */ | |
4998 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4999 | /* | |
5000 | * If the new value will be stored outside of block, | |
5001 | * initalize a new empty value root and insert it first. | |
5002 | */ | |
5003 | local = 0; | |
5004 | xi->value = &def_xv; | |
5005 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
5006 | } | |
5007 | ||
85db90e7 TM |
5008 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5009 | name_hash, local); | |
01225596 TM |
5010 | if (ret) { |
5011 | mlog_errno(ret); | |
5012 | goto out; | |
5013 | } | |
5014 | ||
5a095611 TM |
5015 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5016 | goto out; | |
01225596 | 5017 | |
5a095611 TM |
5018 | /* allocate the space now for the outside block storage. */ |
5019 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5020 | value_len, ctxt); |
5a095611 TM |
5021 | if (ret) { |
5022 | mlog_errno(ret); | |
5023 | ||
5024 | if (xs->not_found) { | |
5025 | /* | |
5026 | * We can't allocate enough clusters for outside | |
5027 | * storage and we have allocated xattr already, | |
5028 | * so need to remove it. | |
5029 | */ | |
85db90e7 | 5030 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5031 | } |
01225596 TM |
5032 | goto out; |
5033 | } | |
5034 | ||
5035 | set_value_outside: | |
85db90e7 TM |
5036 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5037 | xs, val, value_len); | |
01225596 TM |
5038 | out: |
5039 | return ret; | |
5040 | } | |
5041 | ||
80bcaf34 TM |
5042 | /* |
5043 | * check whether the xattr bucket is filled up with the same hash value. | |
5044 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5045 | * If we want to insert a xattr with different hash value, go ahead | |
5046 | * and ocfs2_divide_xattr_bucket will handle this. | |
5047 | */ | |
01225596 | 5048 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5049 | struct ocfs2_xattr_bucket *bucket, |
5050 | const char *name) | |
01225596 | 5051 | { |
3e632946 | 5052 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5053 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5054 | ||
5055 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5056 | return 0; | |
01225596 TM |
5057 | |
5058 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5059 | xh->xh_entries[0].xe_name_hash) { | |
5060 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5061 | "hash = %u\n", | |
9c7759aa | 5062 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5063 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5064 | return -ENOSPC; | |
5065 | } | |
5066 | ||
5067 | return 0; | |
5068 | } | |
5069 | ||
5070 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5071 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5072 | struct ocfs2_xattr_search *xs, |
5073 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5074 | { |
5075 | struct ocfs2_xattr_header *xh; | |
5076 | struct ocfs2_xattr_entry *xe; | |
5077 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5078 | int free, max_free, need, old; |
01225596 TM |
5079 | size_t value_size = 0, name_len = strlen(xi->name); |
5080 | size_t blocksize = inode->i_sb->s_blocksize; | |
5081 | int ret, allocation = 0; | |
01225596 TM |
5082 | |
5083 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5084 | ||
5085 | try_again: | |
5086 | xh = xs->header; | |
5087 | count = le16_to_cpu(xh->xh_count); | |
5088 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5089 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5090 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5091 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5092 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5093 | |
5094 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5095 | "of %u which exceed block size\n", | |
ba937127 | 5096 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5097 | header_size); |
5098 | ||
5099 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5100 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5101 | else if (xi->value) | |
5102 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5103 | ||
5104 | if (xs->not_found) | |
5105 | need = sizeof(struct ocfs2_xattr_entry) + | |
5106 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5107 | else { | |
5108 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5109 | ||
5110 | /* | |
5111 | * We only replace the old value if the new length is smaller | |
5112 | * than the old one. Otherwise we will allocate new space in the | |
5113 | * bucket to store it. | |
5114 | */ | |
5115 | xe = xs->here; | |
5116 | if (ocfs2_xattr_is_local(xe)) | |
5117 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5118 | else | |
5119 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5120 | ||
5121 | if (old >= value_size) | |
5122 | need = 0; | |
5123 | } | |
5124 | ||
4442f518 | 5125 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5126 | /* |
5127 | * We need to make sure the new name/value pair | |
5128 | * can exist in the same block. | |
5129 | */ | |
5130 | if (xh_free_start % blocksize < need) | |
5131 | free -= xh_free_start % blocksize; | |
5132 | ||
5133 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5134 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5135 | " %u\n", xs->not_found, | |
ba937127 | 5136 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5137 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5138 | le16_to_cpu(xh->xh_name_value_len)); | |
5139 | ||
976331d8 TM |
5140 | if (free < need || |
5141 | (xs->not_found && | |
5142 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5143 | if (need <= max_free && |
5144 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5145 | /* | |
5146 | * We can create the space by defragment. Since only the | |
5147 | * name/value will be moved, the xe shouldn't be changed | |
5148 | * in xs. | |
5149 | */ | |
85db90e7 TM |
5150 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5151 | xs->bucket); | |
01225596 TM |
5152 | if (ret) { |
5153 | mlog_errno(ret); | |
5154 | goto out; | |
5155 | } | |
5156 | ||
5157 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5158 | free = xh_free_start - header_size |
5159 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5160 | if (xh_free_start % blocksize < need) |
5161 | free -= xh_free_start % blocksize; | |
5162 | ||
5163 | if (free >= need) | |
5164 | goto xattr_set; | |
5165 | ||
5166 | mlog(0, "Can't get enough space for xattr insert by " | |
5167 | "defragment. Need %u bytes, but we have %d, so " | |
5168 | "allocate new bucket for it.\n", need, free); | |
5169 | } | |
5170 | ||
5171 | /* | |
5172 | * We have to add new buckets or clusters and one | |
5173 | * allocation should leave us enough space for insert. | |
5174 | */ | |
5175 | BUG_ON(allocation); | |
5176 | ||
5177 | /* | |
5178 | * We do not allow for overlapping ranges between buckets. And | |
5179 | * the maximum number of collisions we will allow for then is | |
5180 | * one bucket's worth, so check it here whether we need to | |
5181 | * add a new bucket for the insert. | |
5182 | */ | |
80bcaf34 | 5183 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5184 | xs->bucket, |
80bcaf34 | 5185 | xi->name); |
01225596 TM |
5186 | if (ret) { |
5187 | mlog_errno(ret); | |
5188 | goto out; | |
5189 | } | |
5190 | ||
5191 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5192 | xs->xattr_bh, | |
91f2033f | 5193 | xs->bucket, |
78f30c31 | 5194 | ctxt); |
01225596 TM |
5195 | if (ret) { |
5196 | mlog_errno(ret); | |
5197 | goto out; | |
5198 | } | |
5199 | ||
91f2033f JB |
5200 | /* |
5201 | * ocfs2_add_new_xattr_bucket() will have updated | |
5202 | * xs->bucket if it moved, but it will not have updated | |
5203 | * any of the other search fields. Thus, we drop it and | |
5204 | * re-search. Everything should be cached, so it'll be | |
5205 | * quick. | |
5206 | */ | |
ba937127 | 5207 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5208 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5209 | xi->name_index, | |
5210 | xi->name, xs); | |
5211 | if (ret && ret != -ENODATA) | |
5212 | goto out; | |
5213 | xs->not_found = ret; | |
5214 | allocation = 1; | |
5215 | goto try_again; | |
5216 | } | |
5217 | ||
5218 | xattr_set: | |
78f30c31 | 5219 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5220 | out: |
5221 | mlog_exit(ret); | |
5222 | return ret; | |
5223 | } | |
a3944256 TM |
5224 | |
5225 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5226 | struct ocfs2_xattr_bucket *bucket, | |
5227 | void *para) | |
5228 | { | |
5229 | int ret = 0; | |
3e632946 | 5230 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5231 | u16 i; |
5232 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5233 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5234 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5235 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5236 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
5237 | ||
78f30c31 TM |
5238 | |
5239 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5240 | |
5241 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5242 | xe = &xh->xh_entries[i]; | |
5243 | if (ocfs2_xattr_is_local(xe)) | |
5244 | continue; | |
5245 | ||
88c3b062 TM |
5246 | ctxt.handle = ocfs2_start_trans(osb, credits); |
5247 | if (IS_ERR(ctxt.handle)) { | |
5248 | ret = PTR_ERR(ctxt.handle); | |
5249 | mlog_errno(ret); | |
5250 | break; | |
5251 | } | |
5252 | ||
548b0f22 | 5253 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5254 | i, 0, &ctxt); |
88c3b062 TM |
5255 | |
5256 | ocfs2_commit_trans(osb, ctxt.handle); | |
a3944256 TM |
5257 | if (ret) { |
5258 | mlog_errno(ret); | |
5259 | break; | |
5260 | } | |
5261 | } | |
5262 | ||
78f30c31 TM |
5263 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5264 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5265 | return ret; |
5266 | } | |
5267 | ||
5268 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
5269 | struct buffer_head *xb_bh) | |
5270 | { | |
5271 | struct ocfs2_xattr_block *xb = | |
5272 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5273 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
5274 | int ret = 0; | |
5275 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
5276 | u64 p_blkno; | |
5277 | ||
5278 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
5279 | return 0; | |
5280 | ||
5281 | while (name_hash > 0) { | |
5282 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
5283 | &e_cpos, &num_clusters, el); | |
5284 | if (ret) { | |
5285 | mlog_errno(ret); | |
5286 | goto out; | |
5287 | } | |
5288 | ||
5289 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
5290 | ocfs2_delete_xattr_in_bucket, | |
5291 | NULL); | |
5292 | if (ret) { | |
5293 | mlog_errno(ret); | |
5294 | goto out; | |
5295 | } | |
5296 | ||
5297 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
5298 | p_blkno, e_cpos, num_clusters); | |
5299 | if (ret) { | |
5300 | mlog_errno(ret); | |
5301 | break; | |
5302 | } | |
5303 | ||
5304 | if (e_cpos == 0) | |
5305 | break; | |
5306 | ||
5307 | name_hash = e_cpos - 1; | |
5308 | } | |
5309 | ||
5310 | out: | |
5311 | return ret; | |
5312 | } | |
99219aea | 5313 | |
923f7f31 TY |
5314 | /* |
5315 | * 'security' attributes support | |
5316 | */ | |
5317 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5318 | size_t list_size, const char *name, | |
5319 | size_t name_len) | |
5320 | { | |
5321 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5322 | const size_t total_len = prefix_len + name_len + 1; | |
5323 | ||
5324 | if (list && total_len <= list_size) { | |
5325 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5326 | memcpy(list + prefix_len, name, name_len); | |
5327 | list[prefix_len + name_len] = '\0'; | |
5328 | } | |
5329 | return total_len; | |
5330 | } | |
5331 | ||
5332 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5333 | void *buffer, size_t size) | |
5334 | { | |
5335 | if (strcmp(name, "") == 0) | |
5336 | return -EINVAL; | |
5337 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5338 | buffer, size); | |
5339 | } | |
5340 | ||
5341 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5342 | const void *value, size_t size, int flags) | |
5343 | { | |
5344 | if (strcmp(name, "") == 0) | |
5345 | return -EINVAL; | |
5346 | ||
5347 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5348 | size, flags); | |
5349 | } | |
5350 | ||
534eaddd TY |
5351 | int ocfs2_init_security_get(struct inode *inode, |
5352 | struct inode *dir, | |
5353 | struct ocfs2_security_xattr_info *si) | |
5354 | { | |
38d59ef6 TY |
5355 | /* check whether ocfs2 support feature xattr */ |
5356 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
5357 | return -EOPNOTSUPP; | |
534eaddd TY |
5358 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
5359 | &si->value_len); | |
5360 | } | |
5361 | ||
5362 | int ocfs2_init_security_set(handle_t *handle, | |
5363 | struct inode *inode, | |
5364 | struct buffer_head *di_bh, | |
5365 | struct ocfs2_security_xattr_info *si, | |
5366 | struct ocfs2_alloc_context *xattr_ac, | |
5367 | struct ocfs2_alloc_context *data_ac) | |
5368 | { | |
5369 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5370 | OCFS2_XATTR_INDEX_SECURITY, | |
5371 | si->name, si->value, si->value_len, 0, | |
5372 | xattr_ac, data_ac); | |
5373 | } | |
5374 | ||
923f7f31 TY |
5375 | struct xattr_handler ocfs2_xattr_security_handler = { |
5376 | .prefix = XATTR_SECURITY_PREFIX, | |
5377 | .list = ocfs2_xattr_security_list, | |
5378 | .get = ocfs2_xattr_security_get, | |
5379 | .set = ocfs2_xattr_security_set, | |
5380 | }; | |
5381 | ||
99219aea MF |
5382 | /* |
5383 | * 'trusted' attributes support | |
5384 | */ | |
99219aea MF |
5385 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5386 | size_t list_size, const char *name, | |
5387 | size_t name_len) | |
5388 | { | |
ceb1eba3 | 5389 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5390 | const size_t total_len = prefix_len + name_len + 1; |
5391 | ||
5392 | if (list && total_len <= list_size) { | |
5393 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5394 | memcpy(list + prefix_len, name, name_len); | |
5395 | list[prefix_len + name_len] = '\0'; | |
5396 | } | |
5397 | return total_len; | |
5398 | } | |
5399 | ||
5400 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5401 | void *buffer, size_t size) | |
5402 | { | |
5403 | if (strcmp(name, "") == 0) | |
5404 | return -EINVAL; | |
5405 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5406 | buffer, size); | |
5407 | } | |
5408 | ||
5409 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5410 | const void *value, size_t size, int flags) | |
5411 | { | |
5412 | if (strcmp(name, "") == 0) | |
5413 | return -EINVAL; | |
5414 | ||
5415 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5416 | size, flags); | |
5417 | } | |
5418 | ||
5419 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5420 | .prefix = XATTR_TRUSTED_PREFIX, | |
5421 | .list = ocfs2_xattr_trusted_list, | |
5422 | .get = ocfs2_xattr_trusted_get, | |
5423 | .set = ocfs2_xattr_trusted_set, | |
5424 | }; | |
5425 | ||
99219aea MF |
5426 | /* |
5427 | * 'user' attributes support | |
5428 | */ | |
99219aea MF |
5429 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5430 | size_t list_size, const char *name, | |
5431 | size_t name_len) | |
5432 | { | |
ceb1eba3 | 5433 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5434 | const size_t total_len = prefix_len + name_len + 1; |
5435 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5436 | ||
5437 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5438 | return 0; | |
5439 | ||
5440 | if (list && total_len <= list_size) { | |
5441 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5442 | memcpy(list + prefix_len, name, name_len); | |
5443 | list[prefix_len + name_len] = '\0'; | |
5444 | } | |
5445 | return total_len; | |
5446 | } | |
5447 | ||
5448 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5449 | void *buffer, size_t size) | |
5450 | { | |
5451 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5452 | ||
5453 | if (strcmp(name, "") == 0) | |
5454 | return -EINVAL; | |
5455 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5456 | return -EOPNOTSUPP; | |
5457 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5458 | buffer, size); | |
5459 | } | |
5460 | ||
5461 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5462 | const void *value, size_t size, int flags) | |
5463 | { | |
5464 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5465 | ||
5466 | if (strcmp(name, "") == 0) | |
5467 | return -EINVAL; | |
5468 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5469 | return -EOPNOTSUPP; | |
5470 | ||
5471 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5472 | size, flags); | |
5473 | } | |
5474 | ||
5475 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5476 | .prefix = XATTR_USER_PREFIX, | |
5477 | .list = ocfs2_xattr_user_list, | |
5478 | .get = ocfs2_xattr_user_get, | |
5479 | .set = ocfs2_xattr_user_set, | |
5480 | }; |