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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 | ||
757055ad TM |
257 | if (!ocfs2_buffer_uptodate(bucket->bu_inode, |
258 | bucket->bu_bhs[i])) | |
259 | ocfs2_set_new_buffer_uptodate(bucket->bu_inode, | |
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 | |
ba937127 | 274 | rc = ocfs2_read_blocks(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 JB |
299 | for (i = 0; i < bucket->bu_blocks; i++) { |
300 | rc = ocfs2_journal_access(handle, bucket->bu_inode, | |
1224be02 JB |
301 | bucket->bu_bhs[i], type); |
302 | if (rc) { | |
303 | mlog_errno(rc); | |
304 | break; | |
305 | } | |
306 | } | |
307 | ||
308 | return rc; | |
309 | } | |
310 | ||
311 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
312 | struct ocfs2_xattr_bucket *bucket) |
313 | { | |
ba937127 | 314 | int i; |
1224be02 | 315 | |
c8b9cf9a | 316 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
317 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
318 | bucket->bu_bhs, bucket->bu_blocks, | |
319 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 320 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 321 | |
ba937127 | 322 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
323 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
324 | } | |
325 | ||
ba937127 | 326 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
327 | struct ocfs2_xattr_bucket *src) |
328 | { | |
329 | int i; | |
ba937127 JB |
330 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
331 | ||
332 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
333 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 334 | |
ba937127 | 335 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
336 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
337 | blocksize); | |
338 | } | |
339 | } | |
1224be02 | 340 | |
4ae1d69b JB |
341 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
342 | struct buffer_head *bh) | |
343 | { | |
d6b32bbb | 344 | int rc; |
4ae1d69b JB |
345 | struct ocfs2_xattr_block *xb = |
346 | (struct ocfs2_xattr_block *)bh->b_data; | |
347 | ||
348 | mlog(0, "Validating xattr block %llu\n", | |
349 | (unsigned long long)bh->b_blocknr); | |
350 | ||
d6b32bbb JB |
351 | BUG_ON(!buffer_uptodate(bh)); |
352 | ||
353 | /* | |
354 | * If the ecc fails, we return the error but otherwise | |
355 | * leave the filesystem running. We know any error is | |
356 | * local to this block. | |
357 | */ | |
358 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
359 | if (rc) | |
360 | return rc; | |
361 | ||
362 | /* | |
363 | * Errors after here are fatal | |
364 | */ | |
365 | ||
4ae1d69b JB |
366 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
367 | ocfs2_error(sb, | |
368 | "Extended attribute block #%llu has bad " | |
369 | "signature %.*s", | |
370 | (unsigned long long)bh->b_blocknr, 7, | |
371 | xb->xb_signature); | |
372 | return -EINVAL; | |
373 | } | |
374 | ||
375 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
376 | ocfs2_error(sb, | |
377 | "Extended attribute block #%llu has an " | |
378 | "invalid xb_blkno of %llu", | |
379 | (unsigned long long)bh->b_blocknr, | |
380 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
381 | return -EINVAL; | |
382 | } | |
383 | ||
384 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
385 | ocfs2_error(sb, | |
386 | "Extended attribute block #%llu has an invalid " | |
387 | "xb_fs_generation of #%u", | |
388 | (unsigned long long)bh->b_blocknr, | |
389 | le32_to_cpu(xb->xb_fs_generation)); | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
397 | struct buffer_head **bh) | |
398 | { | |
399 | int rc; | |
400 | struct buffer_head *tmp = *bh; | |
401 | ||
970e4936 JB |
402 | rc = ocfs2_read_block(inode, xb_blkno, &tmp, |
403 | ocfs2_validate_xattr_block); | |
4ae1d69b JB |
404 | |
405 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
406 | if (!rc && !*bh) | |
407 | *bh = tmp; | |
408 | ||
409 | return rc; | |
410 | } | |
411 | ||
936b8834 | 412 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
413 | { |
414 | struct xattr_handler *handler = NULL; | |
415 | ||
416 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
417 | handler = ocfs2_xattr_handler_map[name_index]; | |
418 | ||
936b8834 | 419 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
420 | } |
421 | ||
40daa16a | 422 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 423 | const char *name, |
40daa16a | 424 | int name_len) |
cf1d6c76 TY |
425 | { |
426 | /* Get hash value of uuid from super block */ | |
427 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
428 | int i; | |
429 | ||
cf1d6c76 TY |
430 | /* hash extended attribute name */ |
431 | for (i = 0; i < name_len; i++) { | |
432 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
433 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
434 | *name++; | |
435 | } | |
436 | ||
437 | return hash; | |
438 | } | |
439 | ||
440 | /* | |
441 | * ocfs2_xattr_hash_entry() | |
442 | * | |
443 | * Compute the hash of an extended attribute. | |
444 | */ | |
445 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
446 | struct ocfs2_xattr_header *header, | |
447 | struct ocfs2_xattr_entry *entry) | |
448 | { | |
449 | u32 hash = 0; | |
cf1d6c76 | 450 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 451 | |
2057e5c6 | 452 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
453 | entry->xe_name_hash = cpu_to_le32(hash); |
454 | ||
455 | return; | |
456 | } | |
f56654c4 | 457 | |
534eaddd TY |
458 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
459 | { | |
460 | int size = 0; | |
461 | ||
462 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
463 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
464 | else | |
465 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
466 | size += sizeof(struct ocfs2_xattr_entry); | |
467 | ||
468 | return size; | |
469 | } | |
470 | ||
471 | int ocfs2_calc_security_init(struct inode *dir, | |
472 | struct ocfs2_security_xattr_info *si, | |
473 | int *want_clusters, | |
474 | int *xattr_credits, | |
475 | struct ocfs2_alloc_context **xattr_ac) | |
476 | { | |
477 | int ret = 0; | |
478 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
479 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
480 | si->value_len); | |
481 | ||
482 | /* | |
483 | * The max space of security xattr taken inline is | |
484 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
485 | * So reserve one metadata block for it is ok. | |
486 | */ | |
487 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
488 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
489 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
490 | if (ret) { | |
491 | mlog_errno(ret); | |
492 | return ret; | |
493 | } | |
494 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
495 | } | |
496 | ||
497 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
498 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
499 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
500 | si->value_len); | |
501 | ||
502 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
503 | new_clusters); | |
504 | *want_clusters += new_clusters; | |
505 | } | |
534eaddd TY |
506 | return ret; |
507 | } | |
508 | ||
89c38bd0 TY |
509 | int ocfs2_calc_xattr_init(struct inode *dir, |
510 | struct buffer_head *dir_bh, | |
511 | int mode, | |
512 | struct ocfs2_security_xattr_info *si, | |
513 | int *want_clusters, | |
514 | int *xattr_credits, | |
515 | struct ocfs2_alloc_context **xattr_ac) | |
516 | { | |
517 | int ret = 0; | |
518 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 519 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
520 | |
521 | if (si->enable) | |
522 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
523 | si->value_len); | |
524 | ||
525 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
526 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
527 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
528 | "", NULL, 0); | |
529 | if (acl_len > 0) { | |
530 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
531 | if (S_ISDIR(mode)) | |
532 | a_size <<= 1; | |
533 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
534 | mlog_errno(ret); | |
535 | return ret; | |
536 | } | |
537 | } | |
538 | ||
539 | if (!(s_size + a_size)) | |
540 | return ret; | |
541 | ||
542 | /* | |
543 | * The max space of security xattr taken inline is | |
544 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
545 | * The max space of acl xattr taken inline is | |
546 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
547 | * when blocksize = 512, may reserve one more cluser for | |
548 | * xattr bucket, otherwise reserve one metadata block | |
549 | * for them is ok. | |
6c9fd1dc TY |
550 | * If this is a new directory with inline data, |
551 | * we choose to reserve the entire inline area for | |
552 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
553 | */ |
554 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 555 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 TY |
556 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
557 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
558 | if (ret) { | |
559 | mlog_errno(ret); | |
560 | return ret; | |
561 | } | |
562 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
563 | } | |
564 | ||
565 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
566 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
567 | *want_clusters += 1; | |
568 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
569 | } | |
570 | ||
0e445b6f TY |
571 | /* |
572 | * reserve credits and clusters for xattrs which has large value | |
573 | * and have to be set outside | |
574 | */ | |
575 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
576 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
577 | si->value_len); | |
578 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
579 | new_clusters); | |
580 | *want_clusters += new_clusters; | |
581 | } | |
89c38bd0 TY |
582 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
583 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
584 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
585 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
586 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
587 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
588 | new_clusters); | |
589 | *want_clusters += new_clusters; | |
89c38bd0 TY |
590 | } |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
f56654c4 TM |
595 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
596 | u32 clusters_to_add, | |
19b801f4 | 597 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 598 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
599 | { |
600 | int status = 0; | |
85db90e7 | 601 | handle_t *handle = ctxt->handle; |
f56654c4 TM |
602 | enum ocfs2_alloc_restarted why; |
603 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
19b801f4 | 604 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 605 | struct ocfs2_extent_tree et; |
f56654c4 TM |
606 | |
607 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
608 | ||
19b801f4 | 609 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f99b9b7c | 610 | |
19b801f4 | 611 | status = vb->vb_access(handle, inode, vb->vb_bh, |
2a50a743 | 612 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
613 | if (status < 0) { |
614 | mlog_errno(status); | |
615 | goto leave; | |
616 | } | |
617 | ||
19b801f4 | 618 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
619 | status = ocfs2_add_clusters_in_btree(osb, |
620 | inode, | |
621 | &logical_start, | |
622 | clusters_to_add, | |
623 | 0, | |
f99b9b7c | 624 | &et, |
f56654c4 | 625 | handle, |
78f30c31 TM |
626 | ctxt->data_ac, |
627 | ctxt->meta_ac, | |
f99b9b7c | 628 | &why); |
85db90e7 TM |
629 | if (status < 0) { |
630 | mlog_errno(status); | |
f56654c4 TM |
631 | goto leave; |
632 | } | |
633 | ||
19b801f4 | 634 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
635 | if (status < 0) { |
636 | mlog_errno(status); | |
637 | goto leave; | |
638 | } | |
639 | ||
19b801f4 | 640 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 641 | |
85db90e7 TM |
642 | /* |
643 | * We should have already allocated enough space before the transaction, | |
644 | * so no need to restart. | |
645 | */ | |
646 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
647 | |
648 | leave: | |
f56654c4 TM |
649 | |
650 | return status; | |
651 | } | |
652 | ||
653 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 654 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 655 | u32 cpos, u32 phys_cpos, u32 len, |
78f30c31 | 656 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
657 | { |
658 | int ret; | |
659 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 660 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
661 | struct ocfs2_extent_tree et; |
662 | ||
d72cc72d | 663 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f56654c4 | 664 | |
d72cc72d JB |
665 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
666 | OCFS2_JOURNAL_ACCESS_WRITE); | |
f56654c4 TM |
667 | if (ret) { |
668 | mlog_errno(ret); | |
85db90e7 | 669 | goto out; |
f56654c4 TM |
670 | } |
671 | ||
78f30c31 TM |
672 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, |
673 | &ctxt->dealloc); | |
f56654c4 TM |
674 | if (ret) { |
675 | mlog_errno(ret); | |
85db90e7 | 676 | goto out; |
f56654c4 TM |
677 | } |
678 | ||
d72cc72d | 679 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 680 | |
d72cc72d | 681 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
682 | if (ret) { |
683 | mlog_errno(ret); | |
85db90e7 | 684 | goto out; |
f56654c4 TM |
685 | } |
686 | ||
78f30c31 | 687 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); |
f56654c4 TM |
688 | if (ret) |
689 | mlog_errno(ret); | |
690 | ||
f56654c4 | 691 | out: |
f56654c4 TM |
692 | return ret; |
693 | } | |
694 | ||
695 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
696 | u32 old_clusters, | |
697 | u32 new_clusters, | |
19b801f4 | 698 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 699 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
700 | { |
701 | int ret = 0; | |
702 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
703 | u64 block; | |
f56654c4 TM |
704 | |
705 | if (old_clusters <= new_clusters) | |
706 | return 0; | |
707 | ||
708 | cpos = new_clusters; | |
709 | trunc_len = old_clusters - new_clusters; | |
710 | while (trunc_len) { | |
711 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 712 | &alloc_size, |
19b801f4 | 713 | &vb->vb_xv->xr_list); |
f56654c4 TM |
714 | if (ret) { |
715 | mlog_errno(ret); | |
716 | goto out; | |
717 | } | |
718 | ||
719 | if (alloc_size > trunc_len) | |
720 | alloc_size = trunc_len; | |
721 | ||
19b801f4 | 722 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 723 | phys_cpos, alloc_size, |
78f30c31 | 724 | ctxt); |
f56654c4 TM |
725 | if (ret) { |
726 | mlog_errno(ret); | |
727 | goto out; | |
728 | } | |
729 | ||
730 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
731 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
732 | alloc_size); | |
733 | cpos += alloc_size; | |
734 | trunc_len -= alloc_size; | |
735 | } | |
736 | ||
737 | out: | |
f56654c4 TM |
738 | return ret; |
739 | } | |
740 | ||
741 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 742 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
743 | int len, |
744 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
745 | { |
746 | int ret; | |
747 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 748 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
749 | |
750 | if (new_clusters == old_clusters) | |
751 | return 0; | |
752 | ||
753 | if (new_clusters > old_clusters) | |
754 | ret = ocfs2_xattr_extend_allocation(inode, | |
755 | new_clusters - old_clusters, | |
b3e5d379 | 756 | vb, ctxt); |
f56654c4 TM |
757 | else |
758 | ret = ocfs2_xattr_shrink_size(inode, | |
759 | old_clusters, new_clusters, | |
b3e5d379 | 760 | vb, ctxt); |
f56654c4 TM |
761 | |
762 | return ret; | |
763 | } | |
cf1d6c76 | 764 | |
936b8834 TM |
765 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
766 | size_t *result, const char *prefix, | |
767 | const char *name, int name_len) | |
768 | { | |
769 | char *p = buffer + *result; | |
770 | int prefix_len = strlen(prefix); | |
771 | int total_len = prefix_len + name_len + 1; | |
772 | ||
773 | *result += total_len; | |
774 | ||
775 | /* we are just looking for how big our buffer needs to be */ | |
776 | if (!size) | |
777 | return 0; | |
778 | ||
779 | if (*result > size) | |
780 | return -ERANGE; | |
781 | ||
782 | memcpy(p, prefix, prefix_len); | |
783 | memcpy(p + prefix_len, name, name_len); | |
784 | p[prefix_len + name_len] = '\0'; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
cf1d6c76 TY |
789 | static int ocfs2_xattr_list_entries(struct inode *inode, |
790 | struct ocfs2_xattr_header *header, | |
791 | char *buffer, size_t buffer_size) | |
792 | { | |
936b8834 TM |
793 | size_t result = 0; |
794 | int i, type, ret; | |
795 | const char *prefix, *name; | |
cf1d6c76 TY |
796 | |
797 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
798 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
799 | type = ocfs2_xattr_get_type(entry); |
800 | prefix = ocfs2_xattr_prefix(type); | |
801 | ||
802 | if (prefix) { | |
803 | name = (const char *)header + | |
804 | le16_to_cpu(entry->xe_name_offset); | |
805 | ||
806 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
807 | &result, prefix, name, | |
808 | entry->xe_name_len); | |
809 | if (ret) | |
810 | return ret; | |
cf1d6c76 TY |
811 | } |
812 | } | |
813 | ||
936b8834 | 814 | return result; |
cf1d6c76 TY |
815 | } |
816 | ||
817 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
818 | struct ocfs2_dinode *di, | |
819 | char *buffer, | |
820 | size_t buffer_size) | |
821 | { | |
822 | struct ocfs2_xattr_header *header = NULL; | |
823 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
824 | int ret = 0; | |
825 | ||
826 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
827 | return ret; | |
828 | ||
829 | header = (struct ocfs2_xattr_header *) | |
830 | ((void *)di + inode->i_sb->s_blocksize - | |
831 | le16_to_cpu(di->i_xattr_inline_size)); | |
832 | ||
833 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
838 | static int ocfs2_xattr_block_list(struct inode *inode, | |
839 | struct ocfs2_dinode *di, | |
840 | char *buffer, | |
841 | size_t buffer_size) | |
842 | { | |
843 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 844 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
845 | int ret = 0; |
846 | ||
847 | if (!di->i_xattr_loc) | |
848 | return ret; | |
849 | ||
4ae1d69b JB |
850 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
851 | &blk_bh); | |
cf1d6c76 TY |
852 | if (ret < 0) { |
853 | mlog_errno(ret); | |
854 | return ret; | |
855 | } | |
cf1d6c76 | 856 | |
0c044f0b | 857 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
858 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
859 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
860 | ret = ocfs2_xattr_list_entries(inode, header, | |
861 | buffer, buffer_size); | |
862 | } else { | |
863 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
864 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
865 | buffer, buffer_size); | |
866 | } | |
4ae1d69b | 867 | |
cf1d6c76 TY |
868 | brelse(blk_bh); |
869 | ||
870 | return ret; | |
871 | } | |
872 | ||
873 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
874 | char *buffer, | |
875 | size_t size) | |
876 | { | |
877 | int ret = 0, i_ret = 0, b_ret = 0; | |
878 | struct buffer_head *di_bh = NULL; | |
879 | struct ocfs2_dinode *di = NULL; | |
880 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
881 | ||
8154da3d TY |
882 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
883 | return -EOPNOTSUPP; | |
884 | ||
cf1d6c76 TY |
885 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
886 | return ret; | |
887 | ||
888 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
889 | if (ret < 0) { | |
890 | mlog_errno(ret); | |
891 | return ret; | |
892 | } | |
893 | ||
894 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
895 | ||
896 | down_read(&oi->ip_xattr_sem); | |
897 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
898 | if (i_ret < 0) | |
899 | b_ret = 0; | |
900 | else { | |
901 | if (buffer) { | |
902 | buffer += i_ret; | |
903 | size -= i_ret; | |
904 | } | |
905 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
906 | buffer, size); | |
907 | if (b_ret < 0) | |
908 | i_ret = 0; | |
909 | } | |
910 | up_read(&oi->ip_xattr_sem); | |
911 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
912 | ||
913 | brelse(di_bh); | |
914 | ||
915 | return i_ret + b_ret; | |
916 | } | |
917 | ||
918 | static int ocfs2_xattr_find_entry(int name_index, | |
919 | const char *name, | |
920 | struct ocfs2_xattr_search *xs) | |
921 | { | |
922 | struct ocfs2_xattr_entry *entry; | |
923 | size_t name_len; | |
924 | int i, cmp = 1; | |
925 | ||
926 | if (name == NULL) | |
927 | return -EINVAL; | |
928 | ||
929 | name_len = strlen(name); | |
930 | entry = xs->here; | |
931 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
932 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
933 | if (!cmp) | |
934 | cmp = name_len - entry->xe_name_len; | |
935 | if (!cmp) | |
936 | cmp = memcmp(name, (xs->base + | |
937 | le16_to_cpu(entry->xe_name_offset)), | |
938 | name_len); | |
939 | if (cmp == 0) | |
940 | break; | |
941 | entry += 1; | |
942 | } | |
943 | xs->here = entry; | |
944 | ||
945 | return cmp ? -ENODATA : 0; | |
946 | } | |
947 | ||
948 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 949 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
950 | void *buffer, |
951 | size_t len) | |
952 | { | |
953 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
954 | u64 blkno; | |
955 | int i, ret = 0; | |
956 | size_t cplen, blocksize; | |
957 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
958 | struct ocfs2_extent_list *el; |
959 | ||
cf1d6c76 TY |
960 | el = &xv->xr_list; |
961 | clusters = le32_to_cpu(xv->xr_clusters); | |
962 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
963 | blocksize = inode->i_sb->s_blocksize; | |
964 | ||
965 | cpos = 0; | |
966 | while (cpos < clusters) { | |
967 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
968 | &num_clusters, el); | |
969 | if (ret) { | |
970 | mlog_errno(ret); | |
971 | goto out; | |
972 | } | |
973 | ||
974 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
975 | /* Copy ocfs2_xattr_value */ | |
976 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 977 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
978 | if (ret) { |
979 | mlog_errno(ret); | |
980 | goto out; | |
981 | } | |
982 | ||
983 | cplen = len >= blocksize ? blocksize : len; | |
984 | memcpy(buffer, bh->b_data, cplen); | |
985 | len -= cplen; | |
986 | buffer += cplen; | |
987 | ||
988 | brelse(bh); | |
989 | bh = NULL; | |
990 | if (len == 0) | |
991 | break; | |
992 | } | |
993 | cpos += num_clusters; | |
994 | } | |
995 | out: | |
996 | return ret; | |
997 | } | |
998 | ||
999 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1000 | int name_index, | |
1001 | const char *name, | |
1002 | void *buffer, | |
1003 | size_t buffer_size, | |
1004 | struct ocfs2_xattr_search *xs) | |
1005 | { | |
1006 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1007 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1008 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1009 | size_t size; |
1010 | int ret = 0; | |
1011 | ||
1012 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1013 | return -ENODATA; | |
1014 | ||
1015 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1016 | xs->header = (struct ocfs2_xattr_header *) | |
1017 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1018 | xs->base = (void *)xs->header; | |
1019 | xs->here = xs->header->xh_entries; | |
1020 | ||
1021 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1022 | if (ret) | |
1023 | return ret; | |
1024 | size = le64_to_cpu(xs->here->xe_value_size); | |
1025 | if (buffer) { | |
1026 | if (size > buffer_size) | |
1027 | return -ERANGE; | |
1028 | if (ocfs2_xattr_is_local(xs->here)) { | |
1029 | memcpy(buffer, (void *)xs->base + | |
1030 | le16_to_cpu(xs->here->xe_name_offset) + | |
1031 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1032 | } else { | |
589dc260 TM |
1033 | xv = (struct ocfs2_xattr_value_root *) |
1034 | (xs->base + le16_to_cpu( | |
1035 | xs->here->xe_name_offset) + | |
1036 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1037 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1038 | buffer, size); |
1039 | if (ret < 0) { | |
1040 | mlog_errno(ret); | |
1041 | return ret; | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | return size; | |
1047 | } | |
1048 | ||
1049 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1050 | int name_index, | |
1051 | const char *name, | |
1052 | void *buffer, | |
1053 | size_t buffer_size, | |
1054 | struct ocfs2_xattr_search *xs) | |
1055 | { | |
cf1d6c76 | 1056 | struct ocfs2_xattr_block *xb; |
589dc260 | 1057 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1058 | size_t size; |
589dc260 | 1059 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 | 1060 | |
ba937127 JB |
1061 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1062 | if (!xs->bucket) { | |
1063 | ret = -ENOMEM; | |
1064 | mlog_errno(ret); | |
1065 | goto cleanup; | |
1066 | } | |
589dc260 | 1067 | |
54f443f4 JB |
1068 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1069 | if (ret) { | |
cf1d6c76 | 1070 | mlog_errno(ret); |
cf1d6c76 TY |
1071 | goto cleanup; |
1072 | } | |
1073 | ||
6c1e183e TY |
1074 | if (xs->not_found) { |
1075 | ret = -ENODATA; | |
1076 | goto cleanup; | |
1077 | } | |
1078 | ||
54f443f4 | 1079 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1080 | size = le64_to_cpu(xs->here->xe_value_size); |
1081 | if (buffer) { | |
1082 | ret = -ERANGE; | |
1083 | if (size > buffer_size) | |
1084 | goto cleanup; | |
589dc260 TM |
1085 | |
1086 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1087 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1088 | i = xs->here - xs->header->xh_entries; | |
1089 | ||
1090 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
1091 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 1092 | bucket_xh(xs->bucket), |
589dc260 TM |
1093 | i, |
1094 | &block_off, | |
1095 | &name_offset); | |
ba937127 | 1096 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1097 | } |
cf1d6c76 TY |
1098 | if (ocfs2_xattr_is_local(xs->here)) { |
1099 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1100 | name_offset + name_len, size); |
cf1d6c76 | 1101 | } else { |
589dc260 TM |
1102 | xv = (struct ocfs2_xattr_value_root *) |
1103 | (xs->base + name_offset + name_len); | |
1104 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1105 | buffer, size); |
1106 | if (ret < 0) { | |
1107 | mlog_errno(ret); | |
1108 | goto cleanup; | |
1109 | } | |
1110 | } | |
1111 | } | |
1112 | ret = size; | |
1113 | cleanup: | |
ba937127 | 1114 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1115 | |
54f443f4 JB |
1116 | brelse(xs->xattr_bh); |
1117 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1118 | return ret; |
1119 | } | |
1120 | ||
4e3e9d02 TY |
1121 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1122 | struct buffer_head *di_bh, | |
0030e001 TY |
1123 | int name_index, |
1124 | const char *name, | |
1125 | void *buffer, | |
1126 | size_t buffer_size) | |
cf1d6c76 TY |
1127 | { |
1128 | int ret; | |
1129 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1130 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1131 | struct ocfs2_xattr_search xis = { | |
1132 | .not_found = -ENODATA, | |
1133 | }; | |
1134 | struct ocfs2_xattr_search xbs = { | |
1135 | .not_found = -ENODATA, | |
1136 | }; | |
1137 | ||
8154da3d TY |
1138 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1139 | return -EOPNOTSUPP; | |
1140 | ||
cf1d6c76 TY |
1141 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1142 | ret = -ENODATA; | |
1143 | ||
cf1d6c76 TY |
1144 | xis.inode_bh = xbs.inode_bh = di_bh; |
1145 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1146 | ||
1147 | down_read(&oi->ip_xattr_sem); | |
1148 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1149 | buffer_size, &xis); | |
6c1e183e | 1150 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1151 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1152 | buffer_size, &xbs); | |
1153 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1154 | |
1155 | return ret; | |
1156 | } | |
1157 | ||
1158 | /* ocfs2_xattr_get() | |
1159 | * | |
1160 | * Copy an extended attribute into the buffer provided. | |
1161 | * Buffer is NULL to compute the size of buffer required. | |
1162 | */ | |
1163 | static int ocfs2_xattr_get(struct inode *inode, | |
1164 | int name_index, | |
1165 | const char *name, | |
1166 | void *buffer, | |
1167 | size_t buffer_size) | |
1168 | { | |
1169 | int ret; | |
1170 | struct buffer_head *di_bh = NULL; | |
1171 | ||
1172 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1173 | if (ret < 0) { | |
1174 | mlog_errno(ret); | |
1175 | return ret; | |
1176 | } | |
1177 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1178 | name, buffer, buffer_size); | |
1179 | ||
cf1d6c76 TY |
1180 | ocfs2_inode_unlock(inode, 0); |
1181 | ||
1182 | brelse(di_bh); | |
1183 | ||
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1188 | handle_t *handle, |
cf1d6c76 TY |
1189 | struct ocfs2_xattr_value_root *xv, |
1190 | const void *value, | |
1191 | int value_len) | |
1192 | { | |
71d548a6 | 1193 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1194 | u16 blocksize = inode->i_sb->s_blocksize; |
1195 | u32 p_cluster, num_clusters; | |
1196 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1197 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1198 | u64 blkno; | |
1199 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1200 | |
1201 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1202 | ||
cf1d6c76 TY |
1203 | while (cpos < clusters) { |
1204 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1205 | &num_clusters, &xv->xr_list); | |
1206 | if (ret) { | |
1207 | mlog_errno(ret); | |
85db90e7 | 1208 | goto out; |
cf1d6c76 TY |
1209 | } |
1210 | ||
1211 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1212 | ||
1213 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 1214 | ret = ocfs2_read_block(inode, blkno, &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, | |
1221 | inode, | |
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 | ||
512620f4 JB |
1272 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
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 | |
0c748e95 JB |
1300 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
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 | ||
512620f4 JB |
1621 | ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh, |
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)) { | |
512620f4 JB |
1629 | ret = vb.vb_access(handle, inode, vb.vb_bh, |
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 | } | |
84008972 JB |
1902 | ret = ocfs2_journal_access_di(handle, inode, di_bh, |
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) { | |
84008972 JB |
2111 | ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh, |
2112 | OCFS2_JOURNAL_ACCESS_CREATE); | |
cf1d6c76 TY |
2113 | if (ret < 0) { |
2114 | mlog_errno(ret); | |
85db90e7 | 2115 | goto end; |
cf1d6c76 TY |
2116 | } |
2117 | ||
78f30c31 | 2118 | ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, |
cf1d6c76 TY |
2119 | &suballoc_bit_start, &num_got, |
2120 | &first_blkno); | |
2121 | if (ret < 0) { | |
2122 | mlog_errno(ret); | |
85db90e7 | 2123 | goto end; |
cf1d6c76 TY |
2124 | } |
2125 | ||
2126 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2127 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
2128 | ||
84008972 JB |
2129 | ret = ocfs2_journal_access_xb(handle, inode, new_bh, |
2130 | OCFS2_JOURNAL_ACCESS_CREATE); | |
cf1d6c76 TY |
2131 | if (ret < 0) { |
2132 | mlog_errno(ret); | |
85db90e7 | 2133 | goto end; |
cf1d6c76 TY |
2134 | } |
2135 | ||
2136 | /* Initialize ocfs2_xattr_block */ | |
2137 | xs->xattr_bh = new_bh; | |
2138 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2139 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2140 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2141 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2142 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2143 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2144 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2145 | ||
2146 | xs->header = &xblk->xb_attrs.xb_header; | |
2147 | xs->base = (void *)xs->header; | |
2148 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2149 | xs->here = xs->header->xh_entries; | |
2150 | ||
cf1d6c76 TY |
2151 | ret = ocfs2_journal_dirty(handle, new_bh); |
2152 | if (ret < 0) { | |
2153 | mlog_errno(ret); | |
85db90e7 | 2154 | goto end; |
cf1d6c76 TY |
2155 | } |
2156 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
85db90e7 | 2157 | ocfs2_journal_dirty(handle, xs->inode_bh); |
01225596 TM |
2158 | } else |
2159 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2160 | ||
2161 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2162 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2163 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2164 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2165 | if (!ret || ret != -ENOSPC) |
2166 | goto end; | |
2167 | ||
78f30c31 | 2168 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2169 | if (ret) |
2170 | goto end; | |
cf1d6c76 TY |
2171 | } |
2172 | ||
78f30c31 | 2173 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2174 | |
2175 | end: | |
cf1d6c76 TY |
2176 | |
2177 | return ret; | |
2178 | } | |
2179 | ||
78f30c31 TM |
2180 | /* Check whether the new xattr can be inserted into the inode. */ |
2181 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2182 | struct ocfs2_xattr_info *xi, | |
2183 | struct ocfs2_xattr_search *xs) | |
2184 | { | |
2185 | u64 value_size; | |
2186 | struct ocfs2_xattr_entry *last; | |
2187 | int free, i; | |
2188 | size_t min_offs = xs->end - xs->base; | |
2189 | ||
2190 | if (!xs->header) | |
2191 | return 0; | |
2192 | ||
2193 | last = xs->header->xh_entries; | |
2194 | ||
2195 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2196 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2197 | if (offs < min_offs) | |
2198 | min_offs = offs; | |
2199 | last += 1; | |
2200 | } | |
2201 | ||
4442f518 | 2202 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2203 | if (free < 0) |
2204 | return 0; | |
2205 | ||
2206 | BUG_ON(!xs->not_found); | |
2207 | ||
2208 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2209 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2210 | else | |
2211 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2212 | ||
2213 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2214 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2215 | return 1; | |
2216 | ||
2217 | return 0; | |
2218 | } | |
2219 | ||
2220 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2221 | struct ocfs2_dinode *di, | |
2222 | struct ocfs2_xattr_info *xi, | |
2223 | struct ocfs2_xattr_search *xis, | |
2224 | struct ocfs2_xattr_search *xbs, | |
2225 | int *clusters_need, | |
85db90e7 TM |
2226 | int *meta_need, |
2227 | int *credits_need) | |
78f30c31 TM |
2228 | { |
2229 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2230 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2231 | struct buffer_head *bh = NULL; |
2232 | struct ocfs2_xattr_block *xb = NULL; | |
2233 | struct ocfs2_xattr_entry *xe = NULL; | |
2234 | struct ocfs2_xattr_value_root *xv = NULL; | |
2235 | char *base = NULL; | |
2236 | int name_offset, name_len = 0; | |
2237 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2238 | xi->value_len); | |
2239 | u64 value_size; | |
2240 | ||
71d548a6 TM |
2241 | /* |
2242 | * Calculate the clusters we need to write. | |
2243 | * No matter whether we replace an old one or add a new one, | |
2244 | * we need this for writing. | |
2245 | */ | |
2246 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2247 | credits += new_clusters * | |
2248 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2249 | ||
78f30c31 | 2250 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2251 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2252 | ||
2253 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2254 | clusters_add += new_clusters; |
85db90e7 TM |
2255 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2256 | &def_xv.xv.xr_list, | |
2257 | new_clusters); | |
2258 | } | |
78f30c31 TM |
2259 | |
2260 | goto meta_guess; | |
2261 | } | |
2262 | ||
2263 | if (!xis->not_found) { | |
2264 | xe = xis->here; | |
2265 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2266 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2267 | base = xis->base; | |
85db90e7 | 2268 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2269 | } else { |
970e4936 | 2270 | int i, block_off = 0; |
78f30c31 TM |
2271 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2272 | xe = xbs->here; | |
2273 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2274 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2275 | i = xbs->here - xbs->header->xh_entries; | |
2276 | old_in_xb = 1; | |
2277 | ||
2278 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2279 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2280 | bucket_xh(xbs->bucket), | |
2281 | i, &block_off, | |
2282 | &name_offset); | |
2283 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2284 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2285 | } else { | |
78f30c31 | 2286 | base = xbs->base; |
85db90e7 TM |
2287 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2288 | } | |
2289 | } | |
2290 | ||
2291 | /* | |
2292 | * delete a xattr doesn't need metadata and cluster allocation. | |
2293 | * so just calculate the credits and return. | |
2294 | * | |
2295 | * The credits for removing the value tree will be extended | |
2296 | * by ocfs2_remove_extent itself. | |
2297 | */ | |
2298 | if (!xi->value) { | |
2299 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2300 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2301 | |
2302 | goto out; | |
78f30c31 TM |
2303 | } |
2304 | ||
2305 | /* do cluster allocation guess first. */ | |
2306 | value_size = le64_to_cpu(xe->xe_value_size); | |
2307 | ||
2308 | if (old_in_xb) { | |
2309 | /* | |
2310 | * In xattr set, we always try to set the xe in inode first, | |
2311 | * so if it can be inserted into inode successfully, the old | |
2312 | * one will be removed from the xattr block, and this xattr | |
2313 | * will be inserted into inode as a new xattr in inode. | |
2314 | */ | |
2315 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2316 | clusters_add += new_clusters; | |
a90714c1 | 2317 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2318 | OCFS2_INODE_UPDATE_CREDITS; |
2319 | if (!ocfs2_xattr_is_local(xe)) | |
2320 | credits += ocfs2_calc_extend_credits( | |
2321 | inode->i_sb, | |
2322 | &def_xv.xv.xr_list, | |
2323 | new_clusters); | |
78f30c31 TM |
2324 | goto out; |
2325 | } | |
2326 | } | |
2327 | ||
2328 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2329 | /* the new values will be stored outside. */ | |
2330 | u32 old_clusters = 0; | |
2331 | ||
2332 | if (!ocfs2_xattr_is_local(xe)) { | |
2333 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2334 | value_size); | |
2335 | xv = (struct ocfs2_xattr_value_root *) | |
2336 | (base + name_offset + name_len); | |
97aff52a | 2337 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2338 | } else |
2339 | xv = &def_xv.xv; | |
2340 | ||
85db90e7 | 2341 | if (old_clusters >= new_clusters) { |
a90714c1 | 2342 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2343 | goto out; |
85db90e7 | 2344 | } else { |
78f30c31 TM |
2345 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2346 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2347 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2348 | &xv->xr_list, | |
2349 | new_clusters - | |
2350 | old_clusters); | |
97aff52a TM |
2351 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2352 | goto out; | |
78f30c31 TM |
2353 | } |
2354 | } else { | |
2355 | /* | |
2356 | * Now the new value will be stored inside. So if the new | |
2357 | * value is smaller than the size of value root or the old | |
2358 | * value, we don't need any allocation, otherwise we have | |
2359 | * to guess metadata allocation. | |
2360 | */ | |
2361 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2362 | (!ocfs2_xattr_is_local(xe) && | |
2363 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2364 | goto out; | |
2365 | } | |
2366 | ||
2367 | meta_guess: | |
2368 | /* calculate metadata allocation. */ | |
2369 | if (di->i_xattr_loc) { | |
2370 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2371 | ret = ocfs2_read_xattr_block(inode, |
2372 | le64_to_cpu(di->i_xattr_loc), | |
2373 | &bh); | |
78f30c31 TM |
2374 | if (ret) { |
2375 | mlog_errno(ret); | |
2376 | goto out; | |
2377 | } | |
2378 | ||
2379 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2380 | } else | |
2381 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2382 | ||
90cb546c TM |
2383 | /* |
2384 | * If there is already an xattr tree, good, we can calculate | |
2385 | * like other b-trees. Otherwise we may have the chance of | |
2386 | * create a tree, the credit calculation is borrowed from | |
2387 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2388 | * new tree will be cluster based, so no meta is needed. | |
2389 | */ | |
78f30c31 TM |
2390 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2391 | struct ocfs2_extent_list *el = | |
2392 | &xb->xb_attrs.xb_root.xt_list; | |
2393 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2394 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2395 | el, 1); | |
90cb546c TM |
2396 | } else |
2397 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2398 | |
2399 | /* | |
2400 | * This cluster will be used either for new bucket or for | |
2401 | * new xattr block. | |
2402 | * If the cluster size is the same as the bucket size, one | |
2403 | * more is needed since we may need to extend the bucket | |
2404 | * also. | |
2405 | */ | |
2406 | clusters_add += 1; | |
85db90e7 | 2407 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2408 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2409 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2410 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2411 | clusters_add += 1; |
85db90e7 TM |
2412 | } |
2413 | } else { | |
78f30c31 | 2414 | meta_add += 1; |
85db90e7 TM |
2415 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2416 | } | |
78f30c31 TM |
2417 | out: |
2418 | if (clusters_need) | |
2419 | *clusters_need = clusters_add; | |
2420 | if (meta_need) | |
2421 | *meta_need = meta_add; | |
85db90e7 TM |
2422 | if (credits_need) |
2423 | *credits_need = credits; | |
78f30c31 TM |
2424 | brelse(bh); |
2425 | return ret; | |
2426 | } | |
2427 | ||
2428 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2429 | struct ocfs2_dinode *di, | |
2430 | struct ocfs2_xattr_info *xi, | |
2431 | struct ocfs2_xattr_search *xis, | |
2432 | struct ocfs2_xattr_search *xbs, | |
85db90e7 TM |
2433 | struct ocfs2_xattr_set_ctxt *ctxt, |
2434 | int *credits) | |
78f30c31 TM |
2435 | { |
2436 | int clusters_add, meta_add, ret; | |
2437 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2438 | ||
2439 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2440 | ||
2441 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2442 | ||
2443 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2444 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2445 | if (ret) { |
2446 | mlog_errno(ret); | |
2447 | return ret; | |
2448 | } | |
2449 | ||
85db90e7 TM |
2450 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2451 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2452 | |
2453 | if (meta_add) { | |
2454 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2455 | &ctxt->meta_ac); | |
2456 | if (ret) { | |
2457 | mlog_errno(ret); | |
2458 | goto out; | |
2459 | } | |
2460 | } | |
2461 | ||
2462 | if (clusters_add) { | |
2463 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2464 | if (ret) | |
2465 | mlog_errno(ret); | |
2466 | } | |
2467 | out: | |
2468 | if (ret) { | |
2469 | if (ctxt->meta_ac) { | |
2470 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2471 | ctxt->meta_ac = NULL; | |
2472 | } | |
2473 | ||
2474 | /* | |
2475 | * We cannot have an error and a non null ctxt->data_ac. | |
2476 | */ | |
2477 | } | |
2478 | ||
2479 | return ret; | |
2480 | } | |
2481 | ||
85db90e7 TM |
2482 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2483 | struct ocfs2_dinode *di, | |
2484 | struct ocfs2_xattr_info *xi, | |
2485 | struct ocfs2_xattr_search *xis, | |
2486 | struct ocfs2_xattr_search *xbs, | |
2487 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2488 | { | |
9f868f16 | 2489 | int ret = 0, credits, old_found; |
85db90e7 TM |
2490 | |
2491 | if (!xi->value) { | |
2492 | /* Remove existing extended attribute */ | |
2493 | if (!xis->not_found) | |
2494 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2495 | else if (!xbs->not_found) | |
2496 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2497 | } else { | |
2498 | /* We always try to set extended attribute into inode first*/ | |
2499 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2500 | if (!ret && !xbs->not_found) { | |
2501 | /* | |
2502 | * If succeed and that extended attribute existing in | |
2503 | * external block, then we will remove it. | |
2504 | */ | |
2505 | xi->value = NULL; | |
2506 | xi->value_len = 0; | |
2507 | ||
9f868f16 | 2508 | old_found = xis->not_found; |
85db90e7 TM |
2509 | xis->not_found = -ENODATA; |
2510 | ret = ocfs2_calc_xattr_set_need(inode, | |
2511 | di, | |
2512 | xi, | |
2513 | xis, | |
2514 | xbs, | |
2515 | NULL, | |
2516 | NULL, | |
2517 | &credits); | |
9f868f16 | 2518 | xis->not_found = old_found; |
85db90e7 TM |
2519 | if (ret) { |
2520 | mlog_errno(ret); | |
2521 | goto out; | |
2522 | } | |
2523 | ||
2524 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2525 | ctxt->handle->h_buffer_credits); | |
2526 | if (ret) { | |
2527 | mlog_errno(ret); | |
2528 | goto out; | |
2529 | } | |
2530 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2531 | } else if (ret == -ENOSPC) { | |
2532 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2533 | ret = ocfs2_xattr_block_find(inode, | |
2534 | xi->name_index, | |
2535 | xi->name, xbs); | |
2536 | if (ret) | |
2537 | goto out; | |
2538 | ||
9f868f16 | 2539 | old_found = xis->not_found; |
85db90e7 TM |
2540 | xis->not_found = -ENODATA; |
2541 | ret = ocfs2_calc_xattr_set_need(inode, | |
2542 | di, | |
2543 | xi, | |
2544 | xis, | |
2545 | xbs, | |
2546 | NULL, | |
2547 | NULL, | |
2548 | &credits); | |
9f868f16 | 2549 | xis->not_found = old_found; |
85db90e7 TM |
2550 | if (ret) { |
2551 | mlog_errno(ret); | |
2552 | goto out; | |
2553 | } | |
2554 | ||
2555 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2556 | ctxt->handle->h_buffer_credits); | |
2557 | if (ret) { | |
2558 | mlog_errno(ret); | |
2559 | goto out; | |
2560 | } | |
2561 | } | |
2562 | /* | |
2563 | * If no space in inode, we will set extended attribute | |
2564 | * into external block. | |
2565 | */ | |
2566 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2567 | if (ret) | |
2568 | goto out; | |
2569 | if (!xis->not_found) { | |
2570 | /* | |
2571 | * If succeed and that extended attribute | |
2572 | * existing in inode, we will remove it. | |
2573 | */ | |
2574 | xi->value = NULL; | |
2575 | xi->value_len = 0; | |
2576 | xbs->not_found = -ENODATA; | |
2577 | ret = ocfs2_calc_xattr_set_need(inode, | |
2578 | di, | |
2579 | xi, | |
2580 | xis, | |
2581 | xbs, | |
2582 | NULL, | |
2583 | NULL, | |
2584 | &credits); | |
2585 | if (ret) { | |
2586 | mlog_errno(ret); | |
2587 | goto out; | |
2588 | } | |
2589 | ||
2590 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2591 | ctxt->handle->h_buffer_credits); | |
2592 | if (ret) { | |
2593 | mlog_errno(ret); | |
2594 | goto out; | |
2595 | } | |
2596 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2597 | xis, ctxt); | |
2598 | } | |
2599 | } | |
2600 | } | |
2601 | ||
4b3f6209 TM |
2602 | if (!ret) { |
2603 | /* Update inode ctime. */ | |
89a907af TM |
2604 | ret = ocfs2_journal_access_di(ctxt->handle, inode, |
2605 | xis->inode_bh, | |
2606 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2607 | if (ret) { |
2608 | mlog_errno(ret); | |
2609 | goto out; | |
2610 | } | |
2611 | ||
2612 | inode->i_ctime = CURRENT_TIME; | |
2613 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2614 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2615 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2616 | } | |
85db90e7 TM |
2617 | out: |
2618 | return ret; | |
2619 | } | |
2620 | ||
6c3faba4 TY |
2621 | /* |
2622 | * This function only called duing creating inode | |
2623 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2624 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2625 | */ |
2626 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2627 | struct inode *inode, | |
2628 | struct buffer_head *di_bh, | |
2629 | int name_index, | |
2630 | const char *name, | |
2631 | const void *value, | |
2632 | size_t value_len, | |
2633 | int flags, | |
2634 | struct ocfs2_alloc_context *meta_ac, | |
2635 | struct ocfs2_alloc_context *data_ac) | |
2636 | { | |
2637 | struct ocfs2_dinode *di; | |
2638 | int ret; | |
2639 | ||
2640 | struct ocfs2_xattr_info xi = { | |
2641 | .name_index = name_index, | |
2642 | .name = name, | |
2643 | .value = value, | |
2644 | .value_len = value_len, | |
2645 | }; | |
2646 | ||
2647 | struct ocfs2_xattr_search xis = { | |
2648 | .not_found = -ENODATA, | |
2649 | }; | |
2650 | ||
2651 | struct ocfs2_xattr_search xbs = { | |
2652 | .not_found = -ENODATA, | |
2653 | }; | |
2654 | ||
2655 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2656 | .handle = handle, | |
2657 | .meta_ac = meta_ac, | |
2658 | .data_ac = data_ac, | |
2659 | }; | |
2660 | ||
2661 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2662 | return -EOPNOTSUPP; | |
2663 | ||
008aafaf TY |
2664 | /* |
2665 | * In extreme situation, may need xattr bucket when | |
2666 | * block size is too small. And we have already reserved | |
2667 | * the credits for bucket in mknod. | |
2668 | */ | |
2669 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2670 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2671 | if (!xbs.bucket) { | |
2672 | mlog_errno(-ENOMEM); | |
2673 | return -ENOMEM; | |
2674 | } | |
2675 | } | |
2676 | ||
6c3faba4 TY |
2677 | xis.inode_bh = xbs.inode_bh = di_bh; |
2678 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2679 | ||
2680 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2681 | ||
2682 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2683 | if (ret) | |
2684 | goto cleanup; | |
2685 | if (xis.not_found) { | |
2686 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2687 | if (ret) | |
2688 | goto cleanup; | |
2689 | } | |
2690 | ||
2691 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2692 | ||
2693 | cleanup: | |
2694 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2695 | brelse(xbs.xattr_bh); | |
008aafaf | 2696 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2697 | |
2698 | return ret; | |
2699 | } | |
2700 | ||
cf1d6c76 TY |
2701 | /* |
2702 | * ocfs2_xattr_set() | |
2703 | * | |
2704 | * Set, replace or remove an extended attribute for this inode. | |
2705 | * value is NULL to remove an existing extended attribute, else either | |
2706 | * create or replace an extended attribute. | |
2707 | */ | |
2708 | int ocfs2_xattr_set(struct inode *inode, | |
2709 | int name_index, | |
2710 | const char *name, | |
2711 | const void *value, | |
2712 | size_t value_len, | |
2713 | int flags) | |
2714 | { | |
2715 | struct buffer_head *di_bh = NULL; | |
2716 | struct ocfs2_dinode *di; | |
85db90e7 | 2717 | int ret, credits; |
78f30c31 | 2718 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2719 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2720 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
cf1d6c76 TY |
2721 | |
2722 | struct ocfs2_xattr_info xi = { | |
2723 | .name_index = name_index, | |
2724 | .name = name, | |
2725 | .value = value, | |
2726 | .value_len = value_len, | |
2727 | }; | |
2728 | ||
2729 | struct ocfs2_xattr_search xis = { | |
2730 | .not_found = -ENODATA, | |
2731 | }; | |
2732 | ||
2733 | struct ocfs2_xattr_search xbs = { | |
2734 | .not_found = -ENODATA, | |
2735 | }; | |
2736 | ||
8154da3d TY |
2737 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2738 | return -EOPNOTSUPP; | |
2739 | ||
ba937127 JB |
2740 | /* |
2741 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2742 | * bucket. | |
2743 | */ | |
2744 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2745 | if (!xbs.bucket) { | |
2746 | mlog_errno(-ENOMEM); | |
2747 | return -ENOMEM; | |
2748 | } | |
2749 | ||
cf1d6c76 TY |
2750 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2751 | if (ret < 0) { | |
2752 | mlog_errno(ret); | |
ba937127 | 2753 | goto cleanup_nolock; |
cf1d6c76 TY |
2754 | } |
2755 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2756 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2757 | ||
2758 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2759 | /* | |
2760 | * Scan inode and external block to find the same name | |
2761 | * extended attribute and collect search infomation. | |
2762 | */ | |
2763 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2764 | if (ret) | |
2765 | goto cleanup; | |
2766 | if (xis.not_found) { | |
2767 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2768 | if (ret) | |
2769 | goto cleanup; | |
2770 | } | |
2771 | ||
2772 | if (xis.not_found && xbs.not_found) { | |
2773 | ret = -ENODATA; | |
2774 | if (flags & XATTR_REPLACE) | |
2775 | goto cleanup; | |
2776 | ret = 0; | |
2777 | if (!value) | |
2778 | goto cleanup; | |
2779 | } else { | |
2780 | ret = -EEXIST; | |
2781 | if (flags & XATTR_CREATE) | |
2782 | goto cleanup; | |
2783 | } | |
2784 | ||
85db90e7 TM |
2785 | |
2786 | mutex_lock(&tl_inode->i_mutex); | |
2787 | ||
2788 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2789 | ret = __ocfs2_flush_truncate_log(osb); | |
2790 | if (ret < 0) { | |
2791 | mutex_unlock(&tl_inode->i_mutex); | |
2792 | mlog_errno(ret); | |
2793 | goto cleanup; | |
2794 | } | |
2795 | } | |
2796 | mutex_unlock(&tl_inode->i_mutex); | |
2797 | ||
2798 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
2799 | &xbs, &ctxt, &credits); | |
78f30c31 TM |
2800 | if (ret) { |
2801 | mlog_errno(ret); | |
2802 | goto cleanup; | |
2803 | } | |
2804 | ||
4b3f6209 TM |
2805 | /* we need to update inode's ctime field, so add credit for it. */ |
2806 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
85db90e7 TM |
2807 | ctxt.handle = ocfs2_start_trans(osb, credits); |
2808 | if (IS_ERR(ctxt.handle)) { | |
2809 | ret = PTR_ERR(ctxt.handle); | |
2810 | mlog_errno(ret); | |
2811 | goto cleanup; | |
cf1d6c76 | 2812 | } |
85db90e7 TM |
2813 | |
2814 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2815 | ||
2816 | ocfs2_commit_trans(osb, ctxt.handle); | |
2817 | ||
78f30c31 TM |
2818 | if (ctxt.data_ac) |
2819 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2820 | if (ctxt.meta_ac) | |
2821 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2822 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2823 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2824 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2825 | cleanup: |
2826 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2827 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2828 | cleanup_nolock: |
cf1d6c76 TY |
2829 | brelse(di_bh); |
2830 | brelse(xbs.xattr_bh); | |
ba937127 | 2831 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2832 | |
2833 | return ret; | |
2834 | } | |
2835 | ||
0c044f0b TM |
2836 | /* |
2837 | * Find the xattr extent rec which may contains name_hash. | |
2838 | * e_cpos will be the first name hash of the xattr rec. | |
2839 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2840 | */ | |
2841 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2842 | u32 name_hash, | |
2843 | u64 *p_blkno, | |
2844 | u32 *e_cpos, | |
2845 | u32 *num_clusters, | |
2846 | struct ocfs2_extent_list *el) | |
2847 | { | |
2848 | int ret = 0, i; | |
2849 | struct buffer_head *eb_bh = NULL; | |
2850 | struct ocfs2_extent_block *eb; | |
2851 | struct ocfs2_extent_rec *rec = NULL; | |
2852 | u64 e_blkno = 0; | |
2853 | ||
2854 | if (el->l_tree_depth) { | |
2855 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2856 | if (ret) { | |
2857 | mlog_errno(ret); | |
2858 | goto out; | |
2859 | } | |
2860 | ||
2861 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2862 | el = &eb->h_list; | |
2863 | ||
2864 | if (el->l_tree_depth) { | |
2865 | ocfs2_error(inode->i_sb, | |
2866 | "Inode %lu has non zero tree depth in " | |
2867 | "xattr tree block %llu\n", inode->i_ino, | |
2868 | (unsigned long long)eb_bh->b_blocknr); | |
2869 | ret = -EROFS; | |
2870 | goto out; | |
2871 | } | |
2872 | } | |
2873 | ||
2874 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2875 | rec = &el->l_recs[i]; | |
2876 | ||
2877 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2878 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2879 | break; | |
2880 | } | |
2881 | } | |
2882 | ||
2883 | if (!e_blkno) { | |
2884 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2885 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2886 | le32_to_cpu(rec->e_cpos), | |
2887 | ocfs2_rec_clusters(el, rec)); | |
2888 | ret = -EROFS; | |
2889 | goto out; | |
2890 | } | |
2891 | ||
2892 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2893 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2894 | if (e_cpos) | |
2895 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2896 | out: | |
2897 | brelse(eb_bh); | |
2898 | return ret; | |
2899 | } | |
2900 | ||
2901 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2902 | struct ocfs2_xattr_bucket *bucket, | |
2903 | void *para); | |
2904 | ||
589dc260 | 2905 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2906 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2907 | int name_index, |
2908 | const char *name, | |
2909 | u32 name_hash, | |
2910 | u16 *xe_index, | |
2911 | int *found) | |
2912 | { | |
2913 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2914 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2915 | size_t name_len = strlen(name); |
2916 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2917 | char *xe_name; |
2918 | ||
2919 | /* | |
2920 | * We don't use binary search in the bucket because there | |
2921 | * may be multiple entries with the same name hash. | |
2922 | */ | |
2923 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2924 | xe = &xh->xh_entries[i]; | |
2925 | ||
2926 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2927 | continue; | |
2928 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2929 | break; | |
2930 | ||
2931 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2932 | if (!cmp) | |
2933 | cmp = name_len - xe->xe_name_len; | |
2934 | if (cmp) | |
2935 | continue; | |
2936 | ||
2937 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2938 | xh, | |
2939 | i, | |
2940 | &block_off, | |
2941 | &new_offset); | |
2942 | if (ret) { | |
2943 | mlog_errno(ret); | |
2944 | break; | |
2945 | } | |
2946 | ||
970e4936 | 2947 | |
e2356a3f JB |
2948 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2949 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2950 | *xe_index = i; |
2951 | *found = 1; | |
2952 | ret = 0; | |
2953 | break; | |
2954 | } | |
2955 | } | |
2956 | ||
2957 | return ret; | |
2958 | } | |
2959 | ||
2960 | /* | |
2961 | * Find the specified xattr entry in a series of buckets. | |
2962 | * This series start from p_blkno and last for num_clusters. | |
2963 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2964 | * the num of the valid buckets. | |
2965 | * | |
2966 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2967 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2968 | */ | |
2969 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2970 | int name_index, | |
2971 | const char *name, | |
2972 | u32 name_hash, | |
2973 | u64 p_blkno, | |
2974 | u32 first_hash, | |
2975 | u32 num_clusters, | |
2976 | struct ocfs2_xattr_search *xs) | |
2977 | { | |
2978 | int ret, found = 0; | |
589dc260 TM |
2979 | struct ocfs2_xattr_header *xh = NULL; |
2980 | struct ocfs2_xattr_entry *xe = NULL; | |
2981 | u16 index = 0; | |
2982 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2983 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2984 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2985 | u32 last_hash; |
e2356a3f | 2986 | u64 blkno, lower_blkno = 0; |
589dc260 | 2987 | |
e2356a3f JB |
2988 | search = ocfs2_xattr_bucket_new(inode); |
2989 | if (!search) { | |
2990 | ret = -ENOMEM; | |
2991 | mlog_errno(ret); | |
2992 | goto out; | |
2993 | } | |
2994 | ||
2995 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2996 | if (ret) { |
2997 | mlog_errno(ret); | |
2998 | goto out; | |
2999 | } | |
3000 | ||
e2356a3f | 3001 | xh = bucket_xh(search); |
589dc260 | 3002 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3003 | while (low_bucket <= high_bucket) { |
e2356a3f | 3004 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3005 | |
e2356a3f | 3006 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3007 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3008 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3009 | if (ret) { |
3010 | mlog_errno(ret); | |
3011 | goto out; | |
3012 | } | |
3013 | ||
e2356a3f | 3014 | xh = bucket_xh(search); |
589dc260 TM |
3015 | xe = &xh->xh_entries[0]; |
3016 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3017 | high_bucket = bucket - 1; | |
3018 | continue; | |
3019 | } | |
3020 | ||
3021 | /* | |
3022 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3023 | * bucket is larger than the search one. for an empty |
3024 | * bucket, the last one is also the first one. | |
589dc260 | 3025 | */ |
5a095611 TM |
3026 | if (xh->xh_count) |
3027 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3028 | ||
589dc260 TM |
3029 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3030 | ||
e2356a3f JB |
3031 | /* record lower_blkno which may be the insert place. */ |
3032 | lower_blkno = blkno; | |
589dc260 TM |
3033 | |
3034 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3035 | low_bucket = bucket + 1; | |
3036 | continue; | |
3037 | } | |
3038 | ||
3039 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3040 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3041 | name_index, name, name_hash, |
3042 | &index, &found); | |
3043 | if (ret) { | |
3044 | mlog_errno(ret); | |
3045 | goto out; | |
3046 | } | |
3047 | break; | |
3048 | } | |
3049 | ||
3050 | /* | |
3051 | * Record the bucket we have found. | |
3052 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3053 | * always set it to the previous bucket. | |
3054 | */ | |
e2356a3f JB |
3055 | if (!lower_blkno) |
3056 | lower_blkno = p_blkno; | |
3057 | ||
3058 | /* This should be in cache - we just read it during the search */ | |
3059 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3060 | if (ret) { | |
3061 | mlog_errno(ret); | |
3062 | goto out; | |
589dc260 | 3063 | } |
589dc260 | 3064 | |
ba937127 JB |
3065 | xs->header = bucket_xh(xs->bucket); |
3066 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3067 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3068 | ||
3069 | if (found) { | |
589dc260 TM |
3070 | xs->here = &xs->header->xh_entries[index]; |
3071 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3072 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3073 | } else |
3074 | ret = -ENODATA; | |
3075 | ||
3076 | out: | |
e2356a3f | 3077 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3078 | return ret; |
3079 | } | |
3080 | ||
3081 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3082 | struct buffer_head *root_bh, | |
3083 | int name_index, | |
3084 | const char *name, | |
3085 | struct ocfs2_xattr_search *xs) | |
3086 | { | |
3087 | int ret; | |
3088 | struct ocfs2_xattr_block *xb = | |
3089 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3090 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3091 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3092 | u64 p_blkno = 0; | |
3093 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3094 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3095 | |
3096 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3097 | return -ENODATA; | |
3098 | ||
3099 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3100 | name, name_hash, name_index); | |
3101 | ||
3102 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3103 | &num_clusters, el); | |
3104 | if (ret) { | |
3105 | mlog_errno(ret); | |
3106 | goto out; | |
3107 | } | |
3108 | ||
3109 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3110 | ||
3111 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3112 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3113 | first_hash); | |
589dc260 TM |
3114 | |
3115 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3116 | p_blkno, first_hash, num_clusters, xs); | |
3117 | ||
3118 | out: | |
3119 | return ret; | |
3120 | } | |
3121 | ||
0c044f0b TM |
3122 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3123 | u64 blkno, | |
3124 | u32 clusters, | |
3125 | xattr_bucket_func *func, | |
3126 | void *para) | |
3127 | { | |
6dde41d9 | 3128 | int i, ret = 0; |
0c044f0b TM |
3129 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3130 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3131 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3132 | |
ba937127 JB |
3133 | bucket = ocfs2_xattr_bucket_new(inode); |
3134 | if (!bucket) { | |
3135 | mlog_errno(-ENOMEM); | |
3136 | return -ENOMEM; | |
3137 | } | |
0c044f0b TM |
3138 | |
3139 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3140 | clusters, (unsigned long long)blkno); |
0c044f0b | 3141 | |
ba937127 JB |
3142 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3143 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3144 | if (ret) { |
3145 | mlog_errno(ret); | |
ba937127 | 3146 | break; |
0c044f0b TM |
3147 | } |
3148 | ||
0c044f0b TM |
3149 | /* |
3150 | * The real bucket num in this series of blocks is stored | |
3151 | * in the 1st bucket. | |
3152 | */ | |
3153 | if (i == 0) | |
ba937127 | 3154 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3155 | |
de29c085 MF |
3156 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3157 | (unsigned long long)blkno, | |
ba937127 | 3158 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3159 | if (func) { |
ba937127 JB |
3160 | ret = func(inode, bucket, para); |
3161 | if (ret) | |
0c044f0b | 3162 | mlog_errno(ret); |
ba937127 | 3163 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3164 | } |
3165 | ||
ba937127 JB |
3166 | ocfs2_xattr_bucket_relse(bucket); |
3167 | if (ret) | |
3168 | break; | |
0c044f0b TM |
3169 | } |
3170 | ||
ba937127 | 3171 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3172 | return ret; |
3173 | } | |
3174 | ||
3175 | struct ocfs2_xattr_tree_list { | |
3176 | char *buffer; | |
3177 | size_t buffer_size; | |
936b8834 | 3178 | size_t result; |
0c044f0b TM |
3179 | }; |
3180 | ||
3181 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
3182 | struct ocfs2_xattr_header *xh, | |
3183 | int index, | |
3184 | int *block_off, | |
3185 | int *new_offset) | |
3186 | { | |
3187 | u16 name_offset; | |
3188 | ||
3189 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3190 | return -EINVAL; | |
3191 | ||
3192 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3193 | ||
3194 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
3195 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
3196 | ||
3197 | return 0; | |
3198 | } | |
3199 | ||
3200 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3201 | struct ocfs2_xattr_bucket *bucket, | |
3202 | void *para) | |
3203 | { | |
936b8834 | 3204 | int ret = 0, type; |
0c044f0b | 3205 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3206 | int i, block_off, new_offset; |
936b8834 | 3207 | const char *prefix, *name; |
0c044f0b | 3208 | |
3e632946 JB |
3209 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3210 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3211 | type = ocfs2_xattr_get_type(entry); |
3212 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3213 | |
936b8834 | 3214 | if (prefix) { |
0c044f0b | 3215 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 3216 | bucket_xh(bucket), |
0c044f0b TM |
3217 | i, |
3218 | &block_off, | |
3219 | &new_offset); | |
3220 | if (ret) | |
3221 | break; | |
936b8834 | 3222 | |
51def39f | 3223 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3224 | new_offset; |
3225 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3226 | xl->buffer_size, | |
3227 | &xl->result, | |
3228 | prefix, name, | |
3229 | entry->xe_name_len); | |
3230 | if (ret) | |
3231 | break; | |
0c044f0b TM |
3232 | } |
3233 | } | |
3234 | ||
3235 | return ret; | |
3236 | } | |
3237 | ||
3238 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3239 | struct ocfs2_xattr_tree_root *xt, | |
3240 | char *buffer, | |
3241 | size_t buffer_size) | |
3242 | { | |
3243 | struct ocfs2_extent_list *el = &xt->xt_list; | |
3244 | int ret = 0; | |
3245 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3246 | u64 p_blkno = 0; | |
3247 | struct ocfs2_xattr_tree_list xl = { | |
3248 | .buffer = buffer, | |
3249 | .buffer_size = buffer_size, | |
936b8834 | 3250 | .result = 0, |
0c044f0b TM |
3251 | }; |
3252 | ||
3253 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3254 | return 0; | |
3255 | ||
3256 | while (name_hash > 0) { | |
3257 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3258 | &e_cpos, &num_clusters, el); | |
3259 | if (ret) { | |
3260 | mlog_errno(ret); | |
3261 | goto out; | |
3262 | } | |
3263 | ||
3264 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
3265 | ocfs2_list_xattr_bucket, | |
3266 | &xl); | |
3267 | if (ret) { | |
3268 | mlog_errno(ret); | |
3269 | goto out; | |
3270 | } | |
3271 | ||
3272 | if (e_cpos == 0) | |
3273 | break; | |
3274 | ||
3275 | name_hash = e_cpos - 1; | |
3276 | } | |
3277 | ||
936b8834 | 3278 | ret = xl.result; |
0c044f0b TM |
3279 | out: |
3280 | return ret; | |
3281 | } | |
01225596 TM |
3282 | |
3283 | static int cmp_xe(const void *a, const void *b) | |
3284 | { | |
3285 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3286 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3287 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3288 | ||
3289 | if (l_hash > r_hash) | |
3290 | return 1; | |
3291 | if (l_hash < r_hash) | |
3292 | return -1; | |
3293 | return 0; | |
3294 | } | |
3295 | ||
3296 | static void swap_xe(void *a, void *b, int size) | |
3297 | { | |
3298 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3299 | ||
3300 | tmp = *l; | |
3301 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3302 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3303 | } | |
3304 | ||
3305 | /* | |
3306 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3307 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3308 | * The header goes at the start of the bucket, and the names+values are |
3309 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3310 | * Note: we need to sort the entries since they are not saved in order |
3311 | * in the ocfs2_xattr_block. | |
3312 | */ | |
3313 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3314 | struct buffer_head *xb_bh, | |
178eeac3 | 3315 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3316 | { |
3317 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3318 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3319 | u16 offset, size, off_change; |
3320 | struct ocfs2_xattr_entry *xe; | |
3321 | struct ocfs2_xattr_block *xb = | |
3322 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3323 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3324 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3325 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3326 | char *src = xb_bh->b_data; |
3327 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3328 | |
3329 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3330 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3331 | (unsigned long long)bucket_blkno(bucket)); |
3332 | ||
3333 | for (i = 0; i < blks; i++) | |
3334 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3335 | |
01225596 TM |
3336 | /* |
3337 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3338 | * there is a offset change corresponding to the change of | |
3339 | * ocfs2_xattr_header's position. | |
3340 | */ | |
3341 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3342 | xe = &xb_xh->xh_entries[count - 1]; | |
3343 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3344 | size = blocksize - offset; | |
3345 | ||
3346 | /* copy all the names and values. */ | |
01225596 TM |
3347 | memcpy(target + offset, src + offset, size); |
3348 | ||
3349 | /* Init new header now. */ | |
3350 | xh->xh_count = xb_xh->xh_count; | |
3351 | xh->xh_num_buckets = cpu_to_le16(1); | |
3352 | xh->xh_name_value_len = cpu_to_le16(size); | |
3353 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3354 | ||
3355 | /* copy all the entries. */ | |
178eeac3 | 3356 | target = bucket_block(bucket, 0); |
01225596 TM |
3357 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3358 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3359 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3360 | ||
3361 | /* Change the xe offset for all the xe because of the move. */ | |
3362 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3363 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3364 | for (i = 0; i < count; i++) | |
3365 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3366 | ||
3367 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3368 | offset, size, off_change); | |
3369 | ||
3370 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3371 | cmp_xe, swap_xe); | |
3372 | } | |
3373 | ||
3374 | /* | |
3375 | * After we move xattr from block to index btree, we have to | |
3376 | * update ocfs2_xattr_search to the new xe and base. | |
3377 | * | |
3378 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3379 | * While if the entry is in index b-tree, "bucket" indicates the | |
3380 | * real place of the xattr. | |
3381 | */ | |
178eeac3 JB |
3382 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3383 | struct ocfs2_xattr_search *xs, | |
3384 | struct buffer_head *old_bh) | |
01225596 | 3385 | { |
01225596 TM |
3386 | char *buf = old_bh->b_data; |
3387 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3388 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3389 | int i; |
01225596 | 3390 | |
ba937127 | 3391 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3392 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3393 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3394 | ||
178eeac3 JB |
3395 | if (xs->not_found) |
3396 | return; | |
01225596 | 3397 | |
178eeac3 JB |
3398 | i = xs->here - old_xh->xh_entries; |
3399 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3400 | } |
3401 | ||
3402 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3403 | struct ocfs2_xattr_search *xs, |
3404 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3405 | { |
85db90e7 | 3406 | int ret; |
01225596 TM |
3407 | u32 bit_off, len; |
3408 | u64 blkno; | |
85db90e7 | 3409 | handle_t *handle = ctxt->handle; |
01225596 TM |
3410 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3411 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3412 | struct buffer_head *xb_bh = xs->xattr_bh; |
3413 | struct ocfs2_xattr_block *xb = | |
3414 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3415 | struct ocfs2_xattr_tree_root *xr; | |
3416 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3417 | |
3418 | mlog(0, "create xattr index block for %llu\n", | |
3419 | (unsigned long long)xb_bh->b_blocknr); | |
3420 | ||
3421 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3422 | BUG_ON(!xs->bucket); |
01225596 | 3423 | |
01225596 TM |
3424 | /* |
3425 | * XXX: | |
3426 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3427 | * if performance becomes a problem later. | |
3428 | */ | |
3429 | down_write(&oi->ip_alloc_sem); | |
3430 | ||
84008972 JB |
3431 | ret = ocfs2_journal_access_xb(handle, inode, xb_bh, |
3432 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
3433 | if (ret) { |
3434 | mlog_errno(ret); | |
85db90e7 | 3435 | goto out; |
01225596 TM |
3436 | } |
3437 | ||
78f30c31 TM |
3438 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3439 | 1, 1, &bit_off, &len); | |
01225596 TM |
3440 | if (ret) { |
3441 | mlog_errno(ret); | |
85db90e7 | 3442 | goto out; |
01225596 TM |
3443 | } |
3444 | ||
3445 | /* | |
3446 | * The bucket may spread in many blocks, and | |
3447 | * we will only touch the 1st block and the last block | |
3448 | * in the whole bucket(one for entry and one for data). | |
3449 | */ | |
3450 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3451 | ||
de29c085 MF |
3452 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3453 | (unsigned long long)blkno); | |
01225596 | 3454 | |
178eeac3 JB |
3455 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3456 | if (ret) { | |
01225596 | 3457 | mlog_errno(ret); |
85db90e7 | 3458 | goto out; |
01225596 TM |
3459 | } |
3460 | ||
178eeac3 JB |
3461 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3462 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3463 | if (ret) { |
3464 | mlog_errno(ret); | |
85db90e7 | 3465 | goto out; |
01225596 TM |
3466 | } |
3467 | ||
178eeac3 JB |
3468 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3469 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3470 | |
178eeac3 | 3471 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3472 | |
3473 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3474 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3475 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3476 | ||
3477 | xr = &xb->xb_attrs.xb_root; | |
3478 | xr->xt_clusters = cpu_to_le32(1); | |
3479 | xr->xt_last_eb_blk = 0; | |
3480 | xr->xt_list.l_tree_depth = 0; | |
3481 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3482 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3483 | ||
3484 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3485 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3486 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3487 | ||
3488 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3489 | ||
85db90e7 | 3490 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3491 | |
85db90e7 | 3492 | out: |
01225596 TM |
3493 | up_write(&oi->ip_alloc_sem); |
3494 | ||
01225596 TM |
3495 | return ret; |
3496 | } | |
3497 | ||
3498 | static int cmp_xe_offset(const void *a, const void *b) | |
3499 | { | |
3500 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3501 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3502 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3503 | ||
3504 | if (l_name_offset < r_name_offset) | |
3505 | return 1; | |
3506 | if (l_name_offset > r_name_offset) | |
3507 | return -1; | |
3508 | return 0; | |
3509 | } | |
3510 | ||
3511 | /* | |
3512 | * defrag a xattr bucket if we find that the bucket has some | |
3513 | * holes beteen name/value pairs. | |
3514 | * We will move all the name/value pairs to the end of the bucket | |
3515 | * so that we can spare some space for insertion. | |
3516 | */ | |
3517 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3518 | handle_t *handle, |
01225596 TM |
3519 | struct ocfs2_xattr_bucket *bucket) |
3520 | { | |
3521 | int ret, i; | |
3522 | size_t end, offset, len, value_len; | |
3523 | struct ocfs2_xattr_header *xh; | |
3524 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3525 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3526 | u16 xh_free_start; |
01225596 | 3527 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3528 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3529 | |
3530 | /* | |
3531 | * In order to make the operation more efficient and generic, | |
3532 | * we copy all the blocks into a contiguous memory and do the | |
3533 | * defragment there, so if anything is error, we will not touch | |
3534 | * the real block. | |
3535 | */ | |
3536 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3537 | if (!bucket_buf) { | |
3538 | ret = -EIO; | |
3539 | goto out; | |
3540 | } | |
3541 | ||
3542 | buf = bucket_buf; | |
1c32a2fd TM |
3543 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3544 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3545 | |
1c32a2fd | 3546 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3547 | OCFS2_JOURNAL_ACCESS_WRITE); |
3548 | if (ret < 0) { | |
3549 | mlog_errno(ret); | |
85db90e7 | 3550 | goto out; |
01225596 TM |
3551 | } |
3552 | ||
3553 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3554 | entries = (char *)xh->xh_entries; | |
3555 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3556 | ||
3557 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3558 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3559 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3560 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3561 | |
3562 | /* | |
3563 | * sort all the entries by their offset. | |
3564 | * the largest will be the first, so that we can | |
3565 | * move them to the end one by one. | |
3566 | */ | |
3567 | sort(entries, le16_to_cpu(xh->xh_count), | |
3568 | sizeof(struct ocfs2_xattr_entry), | |
3569 | cmp_xe_offset, swap_xe); | |
3570 | ||
3571 | /* Move all name/values to the end of the bucket. */ | |
3572 | xe = xh->xh_entries; | |
3573 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3574 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3575 | offset = le16_to_cpu(xe->xe_name_offset); | |
3576 | if (ocfs2_xattr_is_local(xe)) | |
3577 | value_len = OCFS2_XATTR_SIZE( | |
3578 | le64_to_cpu(xe->xe_value_size)); | |
3579 | else | |
3580 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3581 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3582 | ||
3583 | /* | |
3584 | * We must make sure that the name/value pair | |
3585 | * exist in the same block. So adjust end to | |
3586 | * the previous block end if needed. | |
3587 | */ | |
3588 | if (((end - len) / blocksize != | |
3589 | (end - 1) / blocksize)) | |
3590 | end = end - end % blocksize; | |
3591 | ||
3592 | if (end > offset + len) { | |
3593 | memmove(bucket_buf + end - len, | |
3594 | bucket_buf + offset, len); | |
3595 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3596 | } | |
3597 | ||
3598 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3599 | "bucket %llu\n", (unsigned long long)blkno); | |
3600 | ||
3601 | end -= len; | |
3602 | } | |
3603 | ||
3604 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3605 | "bucket %llu\n", (unsigned long long)blkno); | |
3606 | ||
3607 | if (xh_free_start == end) | |
85db90e7 | 3608 | goto out; |
01225596 TM |
3609 | |
3610 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3611 | xh->xh_free_start = cpu_to_le16(end); | |
3612 | ||
3613 | /* sort the entries by their name_hash. */ | |
3614 | sort(entries, le16_to_cpu(xh->xh_count), | |
3615 | sizeof(struct ocfs2_xattr_entry), | |
3616 | cmp_xe, swap_xe); | |
3617 | ||
3618 | buf = bucket_buf; | |
1c32a2fd TM |
3619 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3620 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3621 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3622 | |
01225596 | 3623 | out: |
01225596 TM |
3624 | kfree(bucket_buf); |
3625 | return ret; | |
3626 | } | |
3627 | ||
3628 | /* | |
b5c03e74 JB |
3629 | * prev_blkno points to the start of an existing extent. new_blkno |
3630 | * points to a newly allocated extent. Because we know each of our | |
3631 | * clusters contains more than bucket, we can easily split one cluster | |
3632 | * at a bucket boundary. So we take the last cluster of the existing | |
3633 | * extent and split it down the middle. We move the last half of the | |
3634 | * buckets in the last cluster of the existing extent over to the new | |
3635 | * extent. | |
01225596 | 3636 | * |
b5c03e74 JB |
3637 | * first_bh is the buffer at prev_blkno so we can update the existing |
3638 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3639 | * to insert our xattr. If the bucket move places the target in the new | |
3640 | * extent, we'll update first_bh and header_bh after modifying the old | |
3641 | * extent. | |
3642 | * | |
3643 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3644 | */ |
3645 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3646 | handle_t *handle, | |
41cb8148 JB |
3647 | struct ocfs2_xattr_bucket *first, |
3648 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3649 | u64 new_blkno, |
01225596 TM |
3650 | u32 num_clusters, |
3651 | u32 *first_hash) | |
3652 | { | |
c58b6032 | 3653 | int ret; |
41cb8148 JB |
3654 | struct super_block *sb = inode->i_sb; |
3655 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3656 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3657 | int to_move = num_buckets / 2; |
c58b6032 | 3658 | u64 src_blkno; |
41cb8148 JB |
3659 | u64 last_cluster_blkno = bucket_blkno(first) + |
3660 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3661 | |
41cb8148 JB |
3662 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3663 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3664 | |
01225596 | 3665 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3666 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3667 | |
41cb8148 | 3668 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3669 | last_cluster_blkno, new_blkno, |
3670 | to_move, first_hash); | |
01225596 TM |
3671 | if (ret) { |
3672 | mlog_errno(ret); | |
3673 | goto out; | |
3674 | } | |
3675 | ||
c58b6032 JB |
3676 | /* This is the first bucket that got moved */ |
3677 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3678 | |
b5c03e74 | 3679 | /* |
c58b6032 | 3680 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3681 | * update first and target. |
b5c03e74 | 3682 | */ |
41cb8148 | 3683 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3684 | /* Find the block for the new target bucket */ |
3685 | src_blkno = new_blkno + | |
41cb8148 JB |
3686 | (bucket_blkno(target) - src_blkno); |
3687 | ||
3688 | ocfs2_xattr_bucket_relse(first); | |
3689 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3690 | |
b5c03e74 | 3691 | /* |
c58b6032 | 3692 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3693 | * journal from ocfs2_cp_xattr_bucket(). |
3694 | */ | |
41cb8148 | 3695 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3696 | if (ret) { |
3697 | mlog_errno(ret); | |
3698 | goto out; | |
3699 | } | |
41cb8148 JB |
3700 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3701 | if (ret) | |
b5c03e74 | 3702 | mlog_errno(ret); |
01225596 | 3703 | |
01225596 TM |
3704 | } |
3705 | ||
01225596 | 3706 | out: |
01225596 TM |
3707 | return ret; |
3708 | } | |
3709 | ||
01225596 | 3710 | /* |
80bcaf34 TM |
3711 | * Find the suitable pos when we divide a bucket into 2. |
3712 | * We have to make sure the xattrs with the same hash value exist | |
3713 | * in the same bucket. | |
3714 | * | |
3715 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3716 | * place where the hash value changes. Try to find the most even split. | |
3717 | * The most common case is that all entries have different hash values, | |
3718 | * and the first check we make will find a place to split. | |
3719 | */ | |
3720 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3721 | { | |
3722 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3723 | int count = le16_to_cpu(xh->xh_count); | |
3724 | int delta, middle = count / 2; | |
3725 | ||
3726 | /* | |
3727 | * We start at the middle. Each step gets farther away in both | |
3728 | * directions. We therefore hit the change in hash value | |
3729 | * nearest to the middle. Note that this loop does not execute for | |
3730 | * count < 2. | |
3731 | */ | |
3732 | for (delta = 0; delta < middle; delta++) { | |
3733 | /* Let's check delta earlier than middle */ | |
3734 | if (cmp_xe(&entries[middle - delta - 1], | |
3735 | &entries[middle - delta])) | |
3736 | return middle - delta; | |
3737 | ||
3738 | /* For even counts, don't walk off the end */ | |
3739 | if ((middle + delta + 1) == count) | |
3740 | continue; | |
3741 | ||
3742 | /* Now try delta past middle */ | |
3743 | if (cmp_xe(&entries[middle + delta], | |
3744 | &entries[middle + delta + 1])) | |
3745 | return middle + delta + 1; | |
3746 | } | |
3747 | ||
3748 | /* Every entry had the same hash */ | |
3749 | return count; | |
3750 | } | |
3751 | ||
3752 | /* | |
3753 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3754 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3755 | * |
3756 | * Normally half of the xattrs will be moved. But we have to make | |
3757 | * sure that the xattrs with the same hash value are stored in the | |
3758 | * same bucket. If all the xattrs in this bucket have the same hash | |
3759 | * value, the new bucket will be initialized as an empty one and the | |
3760 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3761 | */ |
80bcaf34 TM |
3762 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3763 | handle_t *handle, | |
3764 | u64 blk, | |
3765 | u64 new_blk, | |
3766 | u32 *first_hash, | |
3767 | int new_bucket_head) | |
01225596 TM |
3768 | { |
3769 | int ret, i; | |
80bcaf34 | 3770 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3771 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3772 | struct ocfs2_xattr_header *xh; |
3773 | struct ocfs2_xattr_entry *xe; | |
3774 | int blocksize = inode->i_sb->s_blocksize; | |
3775 | ||
80bcaf34 | 3776 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3777 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3778 | |
ba937127 JB |
3779 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3780 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3781 | if (!s_bucket || !t_bucket) { | |
3782 | ret = -ENOMEM; | |
3783 | mlog_errno(ret); | |
3784 | goto out; | |
3785 | } | |
01225596 | 3786 | |
ba937127 | 3787 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3788 | if (ret) { |
3789 | mlog_errno(ret); | |
3790 | goto out; | |
3791 | } | |
3792 | ||
ba937127 | 3793 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3794 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3795 | if (ret) { |
3796 | mlog_errno(ret); | |
3797 | goto out; | |
3798 | } | |
3799 | ||
784b816a JB |
3800 | /* |
3801 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3802 | * there's no need to read it. | |
3803 | */ | |
ba937127 | 3804 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3805 | if (ret) { |
3806 | mlog_errno(ret); | |
3807 | goto out; | |
3808 | } | |
3809 | ||
2b656c1d JB |
3810 | /* |
3811 | * Hey, if we're overwriting t_bucket, what difference does | |
3812 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
3813 | * same part of ocfs2_cp_xattr_bucket(). | |
3814 | */ | |
ba937127 | 3815 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3816 | new_bucket_head ? |
3817 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3818 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3819 | if (ret) { | |
3820 | mlog_errno(ret); | |
3821 | goto out; | |
01225596 TM |
3822 | } |
3823 | ||
ba937127 | 3824 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3825 | count = le16_to_cpu(xh->xh_count); |
3826 | start = ocfs2_xattr_find_divide_pos(xh); | |
3827 | ||
3828 | if (start == count) { | |
3829 | xe = &xh->xh_entries[start-1]; | |
3830 | ||
3831 | /* | |
3832 | * initialized a new empty bucket here. | |
3833 | * The hash value is set as one larger than | |
3834 | * that of the last entry in the previous bucket. | |
3835 | */ | |
ba937127 JB |
3836 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3837 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3838 | |
ba937127 | 3839 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3840 | xh->xh_free_start = cpu_to_le16(blocksize); |
3841 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3842 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3843 | ||
3844 | goto set_num_buckets; | |
3845 | } | |
3846 | ||
01225596 | 3847 | /* copy the whole bucket to the new first. */ |
ba937127 | 3848 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3849 | |
3850 | /* update the new bucket. */ | |
ba937127 | 3851 | xh = bucket_xh(t_bucket); |
01225596 TM |
3852 | |
3853 | /* | |
3854 | * Calculate the total name/value len and xh_free_start for | |
3855 | * the old bucket first. | |
3856 | */ | |
3857 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3858 | name_value_len = 0; | |
3859 | for (i = 0; i < start; i++) { | |
3860 | xe = &xh->xh_entries[i]; | |
3861 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3862 | if (ocfs2_xattr_is_local(xe)) | |
3863 | xe_len += | |
3864 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3865 | else | |
3866 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3867 | name_value_len += xe_len; | |
3868 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3869 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3870 | } | |
3871 | ||
3872 | /* | |
3873 | * Now begin the modification to the new bucket. | |
3874 | * | |
3875 | * In the new bucket, We just move the xattr entry to the beginning | |
3876 | * and don't touch the name/value. So there will be some holes in the | |
3877 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3878 | * called. | |
3879 | */ | |
3880 | xe = &xh->xh_entries[start]; | |
3881 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3882 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3883 | (int)((char *)xe - (char *)xh), |
3884 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3885 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3886 | xe = &xh->xh_entries[count - start]; | |
3887 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3888 | memset((char *)xe, 0, len); | |
3889 | ||
3890 | le16_add_cpu(&xh->xh_count, -start); | |
3891 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3892 | ||
3893 | /* Calculate xh_free_start for the new bucket. */ | |
3894 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3895 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3896 | xe = &xh->xh_entries[i]; | |
3897 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3898 | if (ocfs2_xattr_is_local(xe)) | |
3899 | xe_len += | |
3900 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3901 | else | |
3902 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3903 | if (le16_to_cpu(xe->xe_name_offset) < | |
3904 | le16_to_cpu(xh->xh_free_start)) | |
3905 | xh->xh_free_start = xe->xe_name_offset; | |
3906 | } | |
3907 | ||
80bcaf34 | 3908 | set_num_buckets: |
01225596 TM |
3909 | /* set xh->xh_num_buckets for the new xh. */ |
3910 | if (new_bucket_head) | |
3911 | xh->xh_num_buckets = cpu_to_le16(1); | |
3912 | else | |
3913 | xh->xh_num_buckets = 0; | |
3914 | ||
ba937127 | 3915 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3916 | |
3917 | /* store the first_hash of the new bucket. */ | |
3918 | if (first_hash) | |
3919 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3920 | ||
3921 | /* | |
80bcaf34 TM |
3922 | * Now only update the 1st block of the old bucket. If we |
3923 | * just added a new empty bucket, there is no need to modify | |
3924 | * it. | |
01225596 | 3925 | */ |
80bcaf34 TM |
3926 | if (start == count) |
3927 | goto out; | |
3928 | ||
ba937127 | 3929 | xh = bucket_xh(s_bucket); |
01225596 TM |
3930 | memset(&xh->xh_entries[start], 0, |
3931 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3932 | xh->xh_count = cpu_to_le16(start); | |
3933 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3934 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3935 | ||
ba937127 | 3936 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3937 | |
3938 | out: | |
ba937127 JB |
3939 | ocfs2_xattr_bucket_free(s_bucket); |
3940 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3941 | |
3942 | return ret; | |
3943 | } | |
3944 | ||
3945 | /* | |
3946 | * Copy xattr from one bucket to another bucket. | |
3947 | * | |
3948 | * The caller must make sure that the journal transaction | |
3949 | * has enough space for journaling. | |
3950 | */ | |
3951 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3952 | handle_t *handle, | |
3953 | u64 s_blkno, | |
3954 | u64 t_blkno, | |
3955 | int t_is_new) | |
3956 | { | |
4980c6da | 3957 | int ret; |
ba937127 | 3958 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3959 | |
3960 | BUG_ON(s_blkno == t_blkno); | |
3961 | ||
3962 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3963 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3964 | t_is_new); | |
01225596 | 3965 | |
ba937127 JB |
3966 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3967 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3968 | if (!s_bucket || !t_bucket) { | |
3969 | ret = -ENOMEM; | |
3970 | mlog_errno(ret); | |
3971 | goto out; | |
3972 | } | |
92de109a | 3973 | |
ba937127 | 3974 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
3975 | if (ret) |
3976 | goto out; | |
3977 | ||
784b816a JB |
3978 | /* |
3979 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3980 | * there's no need to read it. | |
3981 | */ | |
ba937127 | 3982 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3983 | if (ret) |
3984 | goto out; | |
3985 | ||
2b656c1d JB |
3986 | /* |
3987 | * Hey, if we're overwriting t_bucket, what difference does | |
3988 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
3989 | * cluster to fill, we came here from |
3990 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
3991 | * ACCESS_CREATE is required. But we also might have moved data | |
3992 | * out of t_bucket before extending back into it. | |
3993 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
3994 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
3995 | * and copied out the end of the old extent. Then it re-extends |
3996 | * the old extent back to create space for new xattrs. That's | |
3997 | * how we get here, and the bucket isn't really new. | |
3998 | */ | |
ba937127 | 3999 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4000 | t_is_new ? |
4001 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4002 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4003 | if (ret) | |
4004 | goto out; | |
01225596 | 4005 | |
ba937127 JB |
4006 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4007 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4008 | |
4009 | out: | |
ba937127 JB |
4010 | ocfs2_xattr_bucket_free(t_bucket); |
4011 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4012 | |
4013 | return ret; | |
4014 | } | |
4015 | ||
4016 | /* | |
874d65af JB |
4017 | * src_blk points to the start of an existing extent. last_blk points to |
4018 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4019 | * extent. We copy the buckets from the cluster at last_blk to the new |
4020 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4021 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4022 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4023 | * by the same amount. | |
01225596 | 4024 | */ |
54ecb6b6 JB |
4025 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4026 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4027 | unsigned int start_bucket, | |
4028 | u32 *first_hash) | |
01225596 TM |
4029 | { |
4030 | int i, ret, credits; | |
4031 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4032 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4033 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4034 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4035 | |
874d65af JB |
4036 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4037 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4038 | |
54ecb6b6 JB |
4039 | BUG_ON(start_bucket >= num_buckets); |
4040 | if (start_bucket) { | |
4041 | num_buckets -= start_bucket; | |
4042 | last_blk += (start_bucket * blks_per_bucket); | |
4043 | } | |
4044 | ||
15d60929 JB |
4045 | /* The first bucket of the original extent */ |
4046 | old_first = ocfs2_xattr_bucket_new(inode); | |
4047 | /* The first bucket of the new extent */ | |
4048 | new_first = ocfs2_xattr_bucket_new(inode); | |
4049 | if (!old_first || !new_first) { | |
4050 | ret = -ENOMEM; | |
4051 | mlog_errno(ret); | |
4052 | goto out; | |
4053 | } | |
4054 | ||
874d65af | 4055 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4056 | if (ret) { |
4057 | mlog_errno(ret); | |
4058 | goto out; | |
4059 | } | |
4060 | ||
01225596 | 4061 | /* |
54ecb6b6 JB |
4062 | * We need to update the first bucket of the old extent and all |
4063 | * the buckets going to the new extent. | |
01225596 | 4064 | */ |
54ecb6b6 JB |
4065 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4066 | handle->h_buffer_credits; | |
01225596 TM |
4067 | ret = ocfs2_extend_trans(handle, credits); |
4068 | if (ret) { | |
4069 | mlog_errno(ret); | |
4070 | goto out; | |
4071 | } | |
4072 | ||
15d60929 JB |
4073 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4074 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4075 | if (ret) { |
4076 | mlog_errno(ret); | |
4077 | goto out; | |
4078 | } | |
4079 | ||
4080 | for (i = 0; i < num_buckets; i++) { | |
4081 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4082 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4083 | to_blk + (i * blks_per_bucket), |
4084 | 1); | |
01225596 TM |
4085 | if (ret) { |
4086 | mlog_errno(ret); | |
4087 | goto out; | |
4088 | } | |
01225596 TM |
4089 | } |
4090 | ||
15d60929 JB |
4091 | /* |
4092 | * Get the new bucket ready before we dirty anything | |
4093 | * (This actually shouldn't fail, because we already dirtied | |
4094 | * it once in ocfs2_cp_xattr_bucket()). | |
4095 | */ | |
4096 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4097 | if (ret) { | |
01225596 TM |
4098 | mlog_errno(ret); |
4099 | goto out; | |
4100 | } | |
15d60929 JB |
4101 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4102 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4103 | if (ret) { |
4104 | mlog_errno(ret); | |
4105 | goto out; | |
4106 | } | |
4107 | ||
15d60929 JB |
4108 | /* Now update the headers */ |
4109 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4110 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4111 | |
15d60929 JB |
4112 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4113 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4114 | |
4115 | if (first_hash) | |
15d60929 JB |
4116 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4117 | ||
01225596 | 4118 | out: |
15d60929 JB |
4119 | ocfs2_xattr_bucket_free(new_first); |
4120 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4121 | return ret; |
4122 | } | |
4123 | ||
4124 | /* | |
80bcaf34 | 4125 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4126 | * This function should only be called when bucket size == cluster size. |
4127 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4128 | */ | |
80bcaf34 TM |
4129 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4130 | handle_t *handle, | |
4131 | u64 prev_blk, | |
4132 | u64 new_blk, | |
4133 | u32 *first_hash) | |
01225596 TM |
4134 | { |
4135 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4136 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4137 | |
4138 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4139 | ||
4140 | ret = ocfs2_extend_trans(handle, credits); | |
4141 | if (ret) { | |
4142 | mlog_errno(ret); | |
4143 | return ret; | |
4144 | } | |
4145 | ||
4146 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4147 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4148 | new_blk, first_hash, 1); | |
01225596 TM |
4149 | } |
4150 | ||
4151 | /* | |
4152 | * Move some xattrs from the old cluster to the new one since they are not | |
4153 | * contiguous in ocfs2 xattr tree. | |
4154 | * | |
4155 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4156 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4157 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4158 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4159 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4160 | * to extend the insert bucket. | |
4161 | * | |
4162 | * The problem is how much xattr should we move to the new one and when should | |
4163 | * we update first_bh and header_bh? | |
4164 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4165 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4166 | * update the first_bh and header_bh if the insert bucket has been moved | |
4167 | * to the new cluster. | |
4168 | * 2. If cluster_size == bucket_size: | |
4169 | * a) If the previous extent rec has more than one cluster and the insert | |
4170 | * place isn't in the last cluster, copy the entire last cluster to the | |
4171 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4172 | * since they will not be moved into the new cluster. | |
4173 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4174 | * the new one. And we set the extend flag to zero if the insert place is | |
4175 | * moved into the new allocated cluster since no extend is needed. | |
4176 | */ | |
4177 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4178 | handle_t *handle, | |
012ee910 JB |
4179 | struct ocfs2_xattr_bucket *first, |
4180 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4181 | u64 new_blk, |
01225596 TM |
4182 | u32 prev_clusters, |
4183 | u32 *v_start, | |
4184 | int *extend) | |
4185 | { | |
92cf3adf | 4186 | int ret; |
01225596 TM |
4187 | |
4188 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4189 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4190 | (unsigned long long)new_blk); |
01225596 | 4191 | |
41cb8148 | 4192 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4193 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4194 | handle, | |
41cb8148 | 4195 | first, target, |
01225596 | 4196 | new_blk, |
01225596 TM |
4197 | prev_clusters, |
4198 | v_start); | |
012ee910 | 4199 | if (ret) |
41cb8148 | 4200 | mlog_errno(ret); |
41cb8148 | 4201 | } else { |
92cf3adf JB |
4202 | /* The start of the last cluster in the first extent */ |
4203 | u64 last_blk = bucket_blkno(first) + | |
4204 | ((prev_clusters - 1) * | |
4205 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4206 | |
012ee910 | 4207 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4208 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4209 | bucket_blkno(first), |
54ecb6b6 | 4210 | last_blk, new_blk, 0, |
01225596 | 4211 | v_start); |
012ee910 JB |
4212 | if (ret) |
4213 | mlog_errno(ret); | |
4214 | } else { | |
80bcaf34 TM |
4215 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4216 | last_blk, new_blk, | |
4217 | v_start); | |
012ee910 JB |
4218 | if (ret) |
4219 | mlog_errno(ret); | |
01225596 | 4220 | |
92cf3adf | 4221 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4222 | *extend = 0; |
4223 | } | |
4224 | } | |
4225 | ||
4226 | return ret; | |
4227 | } | |
4228 | ||
4229 | /* | |
4230 | * Add a new cluster for xattr storage. | |
4231 | * | |
4232 | * If the new cluster is contiguous with the previous one, it will be | |
4233 | * appended to the same extent record, and num_clusters will be updated. | |
4234 | * If not, we will insert a new extent for it and move some xattrs in | |
4235 | * the last cluster into the new allocated one. | |
4236 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4237 | * lose the benefits of hashing because we'll have to search large leaves. | |
4238 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4239 | * if it's bigger). | |
4240 | * | |
4241 | * first_bh is the first block of the previous extent rec and header_bh | |
4242 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4243 | * when the header_bh is moved into the new cluster. | |
4244 | */ | |
4245 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4246 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4247 | struct ocfs2_xattr_bucket *first, |
4248 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4249 | u32 *num_clusters, |
4250 | u32 prev_cpos, | |
78f30c31 TM |
4251 | int *extend, |
4252 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4253 | { |
85db90e7 | 4254 | int ret; |
01225596 TM |
4255 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4256 | u32 prev_clusters = *num_clusters; | |
4257 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4258 | u64 block; | |
85db90e7 | 4259 | handle_t *handle = ctxt->handle; |
01225596 | 4260 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4261 | struct ocfs2_extent_tree et; |
01225596 TM |
4262 | |
4263 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4264 | "previous xattr blkno = %llu\n", | |
4265 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4266 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4267 | |
8d6220d6 | 4268 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c | 4269 | |
84008972 JB |
4270 | ret = ocfs2_journal_access_xb(handle, inode, root_bh, |
4271 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4272 | if (ret < 0) { |
4273 | mlog_errno(ret); | |
4274 | goto leave; | |
4275 | } | |
4276 | ||
78f30c31 | 4277 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4278 | clusters_to_add, &bit_off, &num_bits); |
4279 | if (ret < 0) { | |
4280 | if (ret != -ENOSPC) | |
4281 | mlog_errno(ret); | |
4282 | goto leave; | |
4283 | } | |
4284 | ||
4285 | BUG_ON(num_bits > clusters_to_add); | |
4286 | ||
4287 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4288 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4289 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4290 | ||
ed29c0ca | 4291 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4292 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4293 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4294 | /* | |
4295 | * If this cluster is contiguous with the old one and | |
4296 | * adding this new cluster, we don't surpass the limit of | |
4297 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4298 | * initialized and used like other buckets in the previous | |
4299 | * cluster. | |
4300 | * So add it as a contiguous one. The caller will handle | |
4301 | * its init process. | |
4302 | */ | |
4303 | v_start = prev_cpos + prev_clusters; | |
4304 | *num_clusters = prev_clusters + num_bits; | |
4305 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4306 | num_bits); | |
4307 | } else { | |
4308 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4309 | handle, | |
012ee910 JB |
4310 | first, |
4311 | target, | |
01225596 | 4312 | block, |
01225596 TM |
4313 | prev_clusters, |
4314 | &v_start, | |
4315 | extend); | |
4316 | if (ret) { | |
4317 | mlog_errno(ret); | |
4318 | goto leave; | |
4319 | } | |
4320 | } | |
4321 | ||
4322 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4323 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c | 4324 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
78f30c31 | 4325 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4326 | if (ret < 0) { |
4327 | mlog_errno(ret); | |
4328 | goto leave; | |
4329 | } | |
4330 | ||
4331 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4332 | if (ret < 0) |
01225596 | 4333 | mlog_errno(ret); |
01225596 TM |
4334 | |
4335 | leave: | |
01225596 TM |
4336 | return ret; |
4337 | } | |
4338 | ||
4339 | /* | |
92de109a JB |
4340 | * We are given an extent. 'first' is the bucket at the very front of |
4341 | * the extent. The extent has space for an additional bucket past | |
4342 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4343 | * of the target bucket. We wish to shift every bucket past the target | |
4344 | * down one, filling in that additional space. When we get back to the | |
4345 | * target, we split the target between itself and the now-empty bucket | |
4346 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4347 | */ |
4348 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4349 | handle_t *handle, |
92de109a JB |
4350 | struct ocfs2_xattr_bucket *first, |
4351 | u64 target_blk, | |
01225596 TM |
4352 | u32 num_clusters) |
4353 | { | |
4354 | int ret, credits; | |
4355 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4356 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4357 | u64 end_blk; |
4358 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4359 | |
4360 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4361 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4362 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4363 | |
92de109a JB |
4364 | /* The extent must have room for an additional bucket */ |
4365 | BUG_ON(new_bucket >= | |
4366 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4367 | |
92de109a JB |
4368 | /* end_blk points to the last existing bucket */ |
4369 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4370 | |
4371 | /* | |
92de109a JB |
4372 | * end_blk is the start of the last existing bucket. |
4373 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4374 | * every bucket after it up to, but not including, the last | |
4375 | * existing bucket. Then we add the last existing bucket, the | |
4376 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4377 | */ |
92de109a | 4378 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4379 | handle->h_buffer_credits; |
4380 | ret = ocfs2_extend_trans(handle, credits); | |
4381 | if (ret) { | |
01225596 TM |
4382 | mlog_errno(ret); |
4383 | goto out; | |
4384 | } | |
4385 | ||
92de109a JB |
4386 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4387 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4388 | if (ret) { |
4389 | mlog_errno(ret); | |
85db90e7 | 4390 | goto out; |
01225596 TM |
4391 | } |
4392 | ||
92de109a | 4393 | while (end_blk != target_blk) { |
01225596 TM |
4394 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4395 | end_blk + blk_per_bucket, 0); | |
4396 | if (ret) | |
85db90e7 | 4397 | goto out; |
01225596 TM |
4398 | end_blk -= blk_per_bucket; |
4399 | } | |
4400 | ||
92de109a JB |
4401 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4402 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4403 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4404 | |
92de109a JB |
4405 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4406 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4407 | |
01225596 TM |
4408 | out: |
4409 | return ret; | |
4410 | } | |
4411 | ||
4412 | /* | |
91f2033f JB |
4413 | * Add new xattr bucket in an extent record and adjust the buckets |
4414 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4415 | * bucket we want to insert into. | |
01225596 | 4416 | * |
91f2033f JB |
4417 | * In the easy case, we will move all the buckets after target down by |
4418 | * one. Half of target's xattrs will be moved to the next bucket. | |
4419 | * | |
4420 | * If current cluster is full, we'll allocate a new one. This may not | |
4421 | * be contiguous. The underlying calls will make sure that there is | |
4422 | * space for the insert, shifting buckets around if necessary. | |
4423 | * 'target' may be moved by those calls. | |
01225596 TM |
4424 | */ |
4425 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4426 | struct buffer_head *xb_bh, | |
91f2033f | 4427 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4428 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4429 | { |
01225596 TM |
4430 | struct ocfs2_xattr_block *xb = |
4431 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4432 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4433 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4434 | u32 name_hash = |
4435 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4436 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4437 | int ret, num_buckets, extend = 1; |
4438 | u64 p_blkno; | |
4439 | u32 e_cpos, num_clusters; | |
92de109a | 4440 | /* The bucket at the front of the extent */ |
91f2033f | 4441 | struct ocfs2_xattr_bucket *first; |
01225596 | 4442 | |
91f2033f JB |
4443 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4444 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4445 | |
ed29c0ca | 4446 | /* The first bucket of the original extent */ |
92de109a | 4447 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4448 | if (!first) { |
92de109a JB |
4449 | ret = -ENOMEM; |
4450 | mlog_errno(ret); | |
4451 | goto out; | |
4452 | } | |
4453 | ||
01225596 TM |
4454 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4455 | &num_clusters, el); | |
4456 | if (ret) { | |
4457 | mlog_errno(ret); | |
4458 | goto out; | |
4459 | } | |
4460 | ||
ed29c0ca | 4461 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4462 | if (ret) { |
4463 | mlog_errno(ret); | |
4464 | goto out; | |
4465 | } | |
4466 | ||
ed29c0ca JB |
4467 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4468 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4469 | /* | |
4470 | * This can move first+target if the target bucket moves | |
4471 | * to the new extent. | |
4472 | */ | |
01225596 TM |
4473 | ret = ocfs2_add_new_xattr_cluster(inode, |
4474 | xb_bh, | |
ed29c0ca JB |
4475 | first, |
4476 | target, | |
01225596 TM |
4477 | &num_clusters, |
4478 | e_cpos, | |
78f30c31 TM |
4479 | &extend, |
4480 | ctxt); | |
01225596 TM |
4481 | if (ret) { |
4482 | mlog_errno(ret); | |
4483 | goto out; | |
4484 | } | |
4485 | } | |
4486 | ||
92de109a | 4487 | if (extend) { |
01225596 | 4488 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4489 | ctxt->handle, |
ed29c0ca JB |
4490 | first, |
4491 | bucket_blkno(target), | |
01225596 | 4492 | num_clusters); |
92de109a JB |
4493 | if (ret) |
4494 | mlog_errno(ret); | |
4495 | } | |
4496 | ||
01225596 | 4497 | out: |
92de109a | 4498 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4499 | |
01225596 TM |
4500 | return ret; |
4501 | } | |
4502 | ||
4503 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4504 | struct ocfs2_xattr_bucket *bucket, | |
4505 | int offs) | |
4506 | { | |
4507 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4508 | ||
4509 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4510 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4511 | } |
4512 | ||
4513 | /* | |
4514 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4515 | * |
4516 | * Note: "local" indicates the real data's locality. So we can't | |
4517 | * just its bucket locality by its length. | |
4518 | */ | |
4519 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4520 | struct ocfs2_xattr_info *xi, | |
4521 | struct ocfs2_xattr_search *xs, | |
4522 | u32 name_hash, | |
5a095611 | 4523 | int local) |
01225596 TM |
4524 | { |
4525 | struct ocfs2_xattr_entry *last, *xe; | |
4526 | int name_len = strlen(xi->name); | |
4527 | struct ocfs2_xattr_header *xh = xs->header; | |
4528 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4529 | size_t blocksize = inode->i_sb->s_blocksize; | |
4530 | char *val; | |
4531 | size_t offs, size, new_size; | |
4532 | ||
4533 | last = &xh->xh_entries[count]; | |
4534 | if (!xs->not_found) { | |
4535 | xe = xs->here; | |
4536 | offs = le16_to_cpu(xe->xe_name_offset); | |
4537 | if (ocfs2_xattr_is_local(xe)) | |
4538 | size = OCFS2_XATTR_SIZE(name_len) + | |
4539 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4540 | else | |
4541 | size = OCFS2_XATTR_SIZE(name_len) + | |
4542 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4543 | ||
4544 | /* | |
4545 | * If the new value will be stored outside, xi->value has been | |
4546 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4547 | * goes with xi->value_len, so we can set new_size safely here. | |
4548 | * See ocfs2_xattr_set_in_bucket. | |
4549 | */ | |
4550 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4551 | OCFS2_XATTR_SIZE(xi->value_len); | |
4552 | ||
4553 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4554 | if (xi->value) { | |
4555 | if (new_size > size) | |
4556 | goto set_new_name_value; | |
4557 | ||
4558 | /* Now replace the old value with new one. */ | |
4559 | if (local) | |
4560 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4561 | else | |
4562 | xe->xe_value_size = 0; | |
4563 | ||
4564 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4565 | xs->bucket, offs); |
01225596 TM |
4566 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4567 | size - OCFS2_XATTR_SIZE(name_len)); | |
4568 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4569 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4570 | xi->value, xi->value_len); | |
4571 | ||
4572 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4573 | ocfs2_xattr_set_local(xe, local); | |
4574 | return; | |
4575 | } else { | |
5a095611 TM |
4576 | /* |
4577 | * Remove the old entry if there is more than one. | |
4578 | * We don't remove the last entry so that we can | |
4579 | * use it to indicate the hash value of the empty | |
4580 | * bucket. | |
4581 | */ | |
01225596 | 4582 | last -= 1; |
01225596 | 4583 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4584 | if (xh->xh_count) { |
4585 | memmove(xe, xe + 1, | |
4586 | (void *)last - (void *)xe); | |
4587 | memset(last, 0, | |
4588 | sizeof(struct ocfs2_xattr_entry)); | |
4589 | } else | |
4590 | xh->xh_free_start = | |
4591 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4592 | ||
01225596 TM |
4593 | return; |
4594 | } | |
4595 | } else { | |
4596 | /* find a new entry for insert. */ | |
4597 | int low = 0, high = count - 1, tmp; | |
4598 | struct ocfs2_xattr_entry *tmp_xe; | |
4599 | ||
5a095611 | 4600 | while (low <= high && count) { |
01225596 TM |
4601 | tmp = (low + high) / 2; |
4602 | tmp_xe = &xh->xh_entries[tmp]; | |
4603 | ||
4604 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4605 | low = tmp + 1; | |
4606 | else if (name_hash < | |
4607 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4608 | high = tmp - 1; | |
06b240d8 TM |
4609 | else { |
4610 | low = tmp; | |
01225596 | 4611 | break; |
06b240d8 | 4612 | } |
01225596 TM |
4613 | } |
4614 | ||
4615 | xe = &xh->xh_entries[low]; | |
4616 | if (low != count) | |
4617 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4618 | ||
4619 | le16_add_cpu(&xh->xh_count, 1); | |
4620 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4621 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4622 | xe->xe_name_len = name_len; | |
4623 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4624 | } | |
4625 | ||
4626 | set_new_name_value: | |
4627 | /* Insert the new name+value. */ | |
4628 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4629 | ||
4630 | /* | |
4631 | * We must make sure that the name/value pair | |
4632 | * exists in the same block. | |
4633 | */ | |
4634 | offs = le16_to_cpu(xh->xh_free_start); | |
4635 | start = offs - size; | |
4636 | ||
4637 | if (start >> inode->i_sb->s_blocksize_bits != | |
4638 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4639 | offs = offs - offs % blocksize; | |
4640 | xh->xh_free_start = cpu_to_le16(offs); | |
4641 | } | |
4642 | ||
ba937127 | 4643 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4644 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4645 | ||
4646 | memset(val, 0, size); | |
4647 | memcpy(val, xi->name, name_len); | |
4648 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4649 | ||
4650 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4651 | ocfs2_xattr_set_local(xe, local); | |
4652 | xs->here = xe; | |
4653 | le16_add_cpu(&xh->xh_free_start, -size); | |
4654 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4655 | ||
4656 | return; | |
4657 | } | |
4658 | ||
01225596 TM |
4659 | /* |
4660 | * Set the xattr entry in the specified bucket. | |
4661 | * The bucket is indicated by xs->bucket and it should have the enough | |
4662 | * space for the xattr insertion. | |
4663 | */ | |
4664 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4665 | handle_t *handle, |
01225596 TM |
4666 | struct ocfs2_xattr_info *xi, |
4667 | struct ocfs2_xattr_search *xs, | |
4668 | u32 name_hash, | |
5a095611 | 4669 | int local) |
01225596 | 4670 | { |
1224be02 | 4671 | int ret; |
02dbf38d | 4672 | u64 blkno; |
01225596 | 4673 | |
ff1ec20e MF |
4674 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4675 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4676 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4677 | |
ba937127 | 4678 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4679 | blkno = bucket_blkno(xs->bucket); |
4680 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4681 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4682 | if (ret) { |
4683 | mlog_errno(ret); | |
4684 | goto out; | |
4685 | } | |
4686 | } | |
4687 | ||
ba937127 | 4688 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4689 | OCFS2_JOURNAL_ACCESS_WRITE); |
4690 | if (ret < 0) { | |
4691 | mlog_errno(ret); | |
4692 | goto out; | |
01225596 TM |
4693 | } |
4694 | ||
5a095611 | 4695 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4696 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4697 | |
01225596 | 4698 | out: |
01225596 TM |
4699 | return ret; |
4700 | } | |
4701 | ||
01225596 TM |
4702 | /* |
4703 | * Truncate the specified xe_off entry in xattr bucket. | |
4704 | * bucket is indicated by header_bh and len is the new length. | |
4705 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4706 | * | |
4707 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4708 | */ | |
4709 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4710 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4711 | int xe_off, |
78f30c31 TM |
4712 | int len, |
4713 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4714 | { |
4715 | int ret, offset; | |
4716 | u64 value_blk; | |
01225596 | 4717 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4718 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4719 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4720 | struct ocfs2_xattr_value_buf vb = { |
4721 | .vb_access = ocfs2_journal_access, | |
4722 | }; | |
01225596 TM |
4723 | |
4724 | xe = &xh->xh_entries[xe_off]; | |
4725 | ||
4726 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4727 | ||
4728 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4729 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4730 | ||
4731 | value_blk = offset / blocksize; | |
4732 | ||
4733 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4734 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4735 | |
b3e5d379 JB |
4736 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4737 | BUG_ON(!vb.vb_bh); | |
01225596 | 4738 | |
b3e5d379 JB |
4739 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4740 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4741 | |
548b0f22 JB |
4742 | /* |
4743 | * From here on out we have to dirty the bucket. The generic | |
4744 | * value calls only modify one of the bucket's bhs, but we need | |
4745 | * to send the bucket at once. So if they error, they *could* have | |
4746 | * modified something. We have to assume they did, and dirty | |
4747 | * the whole bucket. This leaves us in a consistent state. | |
4748 | */ | |
4749 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4750 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4751 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4752 | if (ret) { |
4753 | mlog_errno(ret); | |
554e7f9e TM |
4754 | goto out; |
4755 | } | |
4756 | ||
4757 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
4758 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4759 | if (ret) { | |
4760 | mlog_errno(ret); | |
4761 | goto out; | |
01225596 TM |
4762 | } |
4763 | ||
548b0f22 JB |
4764 | xe->xe_value_size = cpu_to_le64(len); |
4765 | ||
548b0f22 JB |
4766 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
4767 | ||
01225596 | 4768 | out: |
01225596 TM |
4769 | return ret; |
4770 | } | |
4771 | ||
4772 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4773 | struct ocfs2_xattr_search *xs, |
4774 | int len, | |
4775 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4776 | { |
4777 | int ret, offset; | |
4778 | struct ocfs2_xattr_entry *xe = xs->here; | |
4779 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4780 | ||
ba937127 | 4781 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4782 | |
4783 | offset = xe - xh->xh_entries; | |
548b0f22 | 4784 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 4785 | offset, len, ctxt); |
01225596 TM |
4786 | if (ret) |
4787 | mlog_errno(ret); | |
4788 | ||
4789 | return ret; | |
4790 | } | |
4791 | ||
4792 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4793 | handle_t *handle, |
01225596 TM |
4794 | struct ocfs2_xattr_search *xs, |
4795 | char *val, | |
4796 | int value_len) | |
4797 | { | |
712e53e4 | 4798 | int ret, offset, block_off; |
01225596 TM |
4799 | struct ocfs2_xattr_value_root *xv; |
4800 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
4801 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
4802 | void *base; | |
01225596 TM |
4803 | |
4804 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4805 | ||
712e53e4 TM |
4806 | ret = ocfs2_xattr_bucket_get_name_value(inode, xh, |
4807 | xe - xh->xh_entries, | |
4808 | &block_off, | |
4809 | &offset); | |
4810 | if (ret) { | |
4811 | mlog_errno(ret); | |
4812 | goto out; | |
4813 | } | |
01225596 | 4814 | |
712e53e4 TM |
4815 | base = bucket_block(xs->bucket, block_off); |
4816 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
4817 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 4818 | |
712e53e4 TM |
4819 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
4820 | xv, val, value_len); | |
4821 | if (ret) | |
4822 | mlog_errno(ret); | |
4823 | out: | |
4824 | return ret; | |
01225596 TM |
4825 | } |
4826 | ||
01225596 TM |
4827 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4828 | struct buffer_head *root_bh, | |
4829 | u64 blkno, | |
4830 | u32 cpos, | |
4831 | u32 len) | |
4832 | { | |
4833 | int ret; | |
4834 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4835 | struct inode *tl_inode = osb->osb_tl_inode; | |
4836 | handle_t *handle; | |
4837 | struct ocfs2_xattr_block *xb = | |
4838 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4839 | struct ocfs2_alloc_context *meta_ac = NULL; |
4840 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4841 | struct ocfs2_extent_tree et; |
4842 | ||
8d6220d6 | 4843 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4844 | |
4845 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4846 | ||
4847 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4848 | cpos, len, (unsigned long long)blkno); | |
4849 | ||
4850 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4851 | ||
f99b9b7c | 4852 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4853 | if (ret) { |
4854 | mlog_errno(ret); | |
4855 | return ret; | |
4856 | } | |
4857 | ||
4858 | mutex_lock(&tl_inode->i_mutex); | |
4859 | ||
4860 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4861 | ret = __ocfs2_flush_truncate_log(osb); | |
4862 | if (ret < 0) { | |
4863 | mlog_errno(ret); | |
4864 | goto out; | |
4865 | } | |
4866 | } | |
4867 | ||
a90714c1 | 4868 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 4869 | if (IS_ERR(handle)) { |
01225596 TM |
4870 | ret = -ENOMEM; |
4871 | mlog_errno(ret); | |
4872 | goto out; | |
4873 | } | |
4874 | ||
84008972 JB |
4875 | ret = ocfs2_journal_access_xb(handle, inode, root_bh, |
4876 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4877 | if (ret) { |
4878 | mlog_errno(ret); | |
4879 | goto out_commit; | |
4880 | } | |
4881 | ||
f99b9b7c JB |
4882 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4883 | &dealloc); | |
01225596 TM |
4884 | if (ret) { |
4885 | mlog_errno(ret); | |
4886 | goto out_commit; | |
4887 | } | |
4888 | ||
4889 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4890 | ||
4891 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4892 | if (ret) { | |
4893 | mlog_errno(ret); | |
4894 | goto out_commit; | |
4895 | } | |
4896 | ||
4897 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4898 | if (ret) | |
4899 | mlog_errno(ret); | |
4900 | ||
4901 | out_commit: | |
4902 | ocfs2_commit_trans(osb, handle); | |
4903 | out: | |
4904 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4905 | ||
4906 | mutex_unlock(&tl_inode->i_mutex); | |
4907 | ||
4908 | if (meta_ac) | |
4909 | ocfs2_free_alloc_context(meta_ac); | |
4910 | ||
4911 | ocfs2_run_deallocs(osb, &dealloc); | |
4912 | ||
4913 | return ret; | |
4914 | } | |
4915 | ||
01225596 | 4916 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 4917 | handle_t *handle, |
01225596 TM |
4918 | struct ocfs2_xattr_search *xs) |
4919 | { | |
ba937127 | 4920 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4921 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4922 | le16_to_cpu(xh->xh_count) - 1]; | |
4923 | int ret = 0; | |
4924 | ||
ba937127 | 4925 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4926 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4927 | if (ret) { |
4928 | mlog_errno(ret); | |
85db90e7 | 4929 | return; |
01225596 TM |
4930 | } |
4931 | ||
4932 | /* Remove the old entry. */ | |
4933 | memmove(xs->here, xs->here + 1, | |
4934 | (void *)last - (void *)xs->here); | |
4935 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4936 | le16_add_cpu(&xh->xh_count, -1); | |
4937 | ||
ba937127 | 4938 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
4939 | } |
4940 | ||
4941 | /* | |
4942 | * Set the xattr name/value in the bucket specified in xs. | |
4943 | * | |
4944 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4945 | * we divide the whole process into 3 steps: | |
4946 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4947 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4948 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4949 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4950 | * to free the xattr we allocated in set. | |
4951 | */ | |
4952 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4953 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4954 | struct ocfs2_xattr_search *xs, |
4955 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4956 | { |
5a095611 | 4957 | int ret, local = 1; |
01225596 TM |
4958 | size_t value_len; |
4959 | char *val = (char *)xi->value; | |
4960 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4961 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4962 | strlen(xi->name)); | |
01225596 TM |
4963 | |
4964 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4965 | /* | |
4966 | * We need to truncate the xattr storage first. | |
4967 | * | |
4968 | * If both the old and new value are stored to | |
4969 | * outside block, we only need to truncate | |
4970 | * the storage and then set the value outside. | |
4971 | * | |
4972 | * If the new value should be stored within block, | |
4973 | * we should free all the outside block first and | |
4974 | * the modification to the xattr block will be done | |
4975 | * by following steps. | |
4976 | */ | |
4977 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4978 | value_len = xi->value_len; | |
4979 | else | |
4980 | value_len = 0; | |
4981 | ||
4982 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
4983 | value_len, |
4984 | ctxt); | |
01225596 TM |
4985 | if (ret) |
4986 | goto out; | |
4987 | ||
4988 | if (value_len) | |
4989 | goto set_value_outside; | |
4990 | } | |
4991 | ||
4992 | value_len = xi->value_len; | |
4993 | /* So we have to handle the inside block change now. */ | |
4994 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4995 | /* | |
4996 | * If the new value will be stored outside of block, | |
4997 | * initalize a new empty value root and insert it first. | |
4998 | */ | |
4999 | local = 0; | |
5000 | xi->value = &def_xv; | |
5001 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
5002 | } | |
5003 | ||
85db90e7 TM |
5004 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5005 | name_hash, local); | |
01225596 TM |
5006 | if (ret) { |
5007 | mlog_errno(ret); | |
5008 | goto out; | |
5009 | } | |
5010 | ||
5a095611 TM |
5011 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5012 | goto out; | |
01225596 | 5013 | |
5a095611 TM |
5014 | /* allocate the space now for the outside block storage. */ |
5015 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5016 | value_len, ctxt); |
5a095611 TM |
5017 | if (ret) { |
5018 | mlog_errno(ret); | |
5019 | ||
5020 | if (xs->not_found) { | |
5021 | /* | |
5022 | * We can't allocate enough clusters for outside | |
5023 | * storage and we have allocated xattr already, | |
5024 | * so need to remove it. | |
5025 | */ | |
85db90e7 | 5026 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5027 | } |
01225596 TM |
5028 | goto out; |
5029 | } | |
5030 | ||
5031 | set_value_outside: | |
85db90e7 TM |
5032 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5033 | xs, val, value_len); | |
01225596 TM |
5034 | out: |
5035 | return ret; | |
5036 | } | |
5037 | ||
80bcaf34 TM |
5038 | /* |
5039 | * check whether the xattr bucket is filled up with the same hash value. | |
5040 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5041 | * If we want to insert a xattr with different hash value, go ahead | |
5042 | * and ocfs2_divide_xattr_bucket will handle this. | |
5043 | */ | |
01225596 | 5044 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5045 | struct ocfs2_xattr_bucket *bucket, |
5046 | const char *name) | |
01225596 | 5047 | { |
3e632946 | 5048 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5049 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5050 | ||
5051 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5052 | return 0; | |
01225596 TM |
5053 | |
5054 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5055 | xh->xh_entries[0].xe_name_hash) { | |
5056 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5057 | "hash = %u\n", | |
9c7759aa | 5058 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5059 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5060 | return -ENOSPC; | |
5061 | } | |
5062 | ||
5063 | return 0; | |
5064 | } | |
5065 | ||
5066 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5067 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5068 | struct ocfs2_xattr_search *xs, |
5069 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5070 | { |
5071 | struct ocfs2_xattr_header *xh; | |
5072 | struct ocfs2_xattr_entry *xe; | |
5073 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5074 | int free, max_free, need, old; |
01225596 TM |
5075 | size_t value_size = 0, name_len = strlen(xi->name); |
5076 | size_t blocksize = inode->i_sb->s_blocksize; | |
5077 | int ret, allocation = 0; | |
01225596 TM |
5078 | |
5079 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5080 | ||
5081 | try_again: | |
5082 | xh = xs->header; | |
5083 | count = le16_to_cpu(xh->xh_count); | |
5084 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5085 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5086 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5087 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5088 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5089 | |
5090 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5091 | "of %u which exceed block size\n", | |
ba937127 | 5092 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5093 | header_size); |
5094 | ||
5095 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5096 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5097 | else if (xi->value) | |
5098 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5099 | ||
5100 | if (xs->not_found) | |
5101 | need = sizeof(struct ocfs2_xattr_entry) + | |
5102 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5103 | else { | |
5104 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5105 | ||
5106 | /* | |
5107 | * We only replace the old value if the new length is smaller | |
5108 | * than the old one. Otherwise we will allocate new space in the | |
5109 | * bucket to store it. | |
5110 | */ | |
5111 | xe = xs->here; | |
5112 | if (ocfs2_xattr_is_local(xe)) | |
5113 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5114 | else | |
5115 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5116 | ||
5117 | if (old >= value_size) | |
5118 | need = 0; | |
5119 | } | |
5120 | ||
4442f518 | 5121 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5122 | /* |
5123 | * We need to make sure the new name/value pair | |
5124 | * can exist in the same block. | |
5125 | */ | |
5126 | if (xh_free_start % blocksize < need) | |
5127 | free -= xh_free_start % blocksize; | |
5128 | ||
5129 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5130 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5131 | " %u\n", xs->not_found, | |
ba937127 | 5132 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5133 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5134 | le16_to_cpu(xh->xh_name_value_len)); | |
5135 | ||
976331d8 TM |
5136 | if (free < need || |
5137 | (xs->not_found && | |
5138 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5139 | if (need <= max_free && |
5140 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5141 | /* | |
5142 | * We can create the space by defragment. Since only the | |
5143 | * name/value will be moved, the xe shouldn't be changed | |
5144 | * in xs. | |
5145 | */ | |
85db90e7 TM |
5146 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5147 | xs->bucket); | |
01225596 TM |
5148 | if (ret) { |
5149 | mlog_errno(ret); | |
5150 | goto out; | |
5151 | } | |
5152 | ||
5153 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5154 | free = xh_free_start - header_size |
5155 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5156 | if (xh_free_start % blocksize < need) |
5157 | free -= xh_free_start % blocksize; | |
5158 | ||
5159 | if (free >= need) | |
5160 | goto xattr_set; | |
5161 | ||
5162 | mlog(0, "Can't get enough space for xattr insert by " | |
5163 | "defragment. Need %u bytes, but we have %d, so " | |
5164 | "allocate new bucket for it.\n", need, free); | |
5165 | } | |
5166 | ||
5167 | /* | |
5168 | * We have to add new buckets or clusters and one | |
5169 | * allocation should leave us enough space for insert. | |
5170 | */ | |
5171 | BUG_ON(allocation); | |
5172 | ||
5173 | /* | |
5174 | * We do not allow for overlapping ranges between buckets. And | |
5175 | * the maximum number of collisions we will allow for then is | |
5176 | * one bucket's worth, so check it here whether we need to | |
5177 | * add a new bucket for the insert. | |
5178 | */ | |
80bcaf34 | 5179 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5180 | xs->bucket, |
80bcaf34 | 5181 | xi->name); |
01225596 TM |
5182 | if (ret) { |
5183 | mlog_errno(ret); | |
5184 | goto out; | |
5185 | } | |
5186 | ||
5187 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5188 | xs->xattr_bh, | |
91f2033f | 5189 | xs->bucket, |
78f30c31 | 5190 | ctxt); |
01225596 TM |
5191 | if (ret) { |
5192 | mlog_errno(ret); | |
5193 | goto out; | |
5194 | } | |
5195 | ||
91f2033f JB |
5196 | /* |
5197 | * ocfs2_add_new_xattr_bucket() will have updated | |
5198 | * xs->bucket if it moved, but it will not have updated | |
5199 | * any of the other search fields. Thus, we drop it and | |
5200 | * re-search. Everything should be cached, so it'll be | |
5201 | * quick. | |
5202 | */ | |
ba937127 | 5203 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5204 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5205 | xi->name_index, | |
5206 | xi->name, xs); | |
5207 | if (ret && ret != -ENODATA) | |
5208 | goto out; | |
5209 | xs->not_found = ret; | |
5210 | allocation = 1; | |
5211 | goto try_again; | |
5212 | } | |
5213 | ||
5214 | xattr_set: | |
78f30c31 | 5215 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5216 | out: |
5217 | mlog_exit(ret); | |
5218 | return ret; | |
5219 | } | |
a3944256 TM |
5220 | |
5221 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5222 | struct ocfs2_xattr_bucket *bucket, | |
5223 | void *para) | |
5224 | { | |
5225 | int ret = 0; | |
3e632946 | 5226 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5227 | u16 i; |
5228 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5229 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5230 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5231 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5232 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
5233 | ||
78f30c31 TM |
5234 | |
5235 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5236 | |
5237 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5238 | xe = &xh->xh_entries[i]; | |
5239 | if (ocfs2_xattr_is_local(xe)) | |
5240 | continue; | |
5241 | ||
88c3b062 TM |
5242 | ctxt.handle = ocfs2_start_trans(osb, credits); |
5243 | if (IS_ERR(ctxt.handle)) { | |
5244 | ret = PTR_ERR(ctxt.handle); | |
5245 | mlog_errno(ret); | |
5246 | break; | |
5247 | } | |
5248 | ||
548b0f22 | 5249 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5250 | i, 0, &ctxt); |
88c3b062 TM |
5251 | |
5252 | ocfs2_commit_trans(osb, ctxt.handle); | |
a3944256 TM |
5253 | if (ret) { |
5254 | mlog_errno(ret); | |
5255 | break; | |
5256 | } | |
5257 | } | |
5258 | ||
78f30c31 TM |
5259 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5260 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5261 | return ret; |
5262 | } | |
5263 | ||
5264 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
5265 | struct buffer_head *xb_bh) | |
5266 | { | |
5267 | struct ocfs2_xattr_block *xb = | |
5268 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5269 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
5270 | int ret = 0; | |
5271 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
5272 | u64 p_blkno; | |
5273 | ||
5274 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
5275 | return 0; | |
5276 | ||
5277 | while (name_hash > 0) { | |
5278 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
5279 | &e_cpos, &num_clusters, el); | |
5280 | if (ret) { | |
5281 | mlog_errno(ret); | |
5282 | goto out; | |
5283 | } | |
5284 | ||
5285 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
5286 | ocfs2_delete_xattr_in_bucket, | |
5287 | NULL); | |
5288 | if (ret) { | |
5289 | mlog_errno(ret); | |
5290 | goto out; | |
5291 | } | |
5292 | ||
5293 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
5294 | p_blkno, e_cpos, num_clusters); | |
5295 | if (ret) { | |
5296 | mlog_errno(ret); | |
5297 | break; | |
5298 | } | |
5299 | ||
5300 | if (e_cpos == 0) | |
5301 | break; | |
5302 | ||
5303 | name_hash = e_cpos - 1; | |
5304 | } | |
5305 | ||
5306 | out: | |
5307 | return ret; | |
5308 | } | |
99219aea | 5309 | |
923f7f31 TY |
5310 | /* |
5311 | * 'security' attributes support | |
5312 | */ | |
5313 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5314 | size_t list_size, const char *name, | |
5315 | size_t name_len) | |
5316 | { | |
5317 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5318 | const size_t total_len = prefix_len + name_len + 1; | |
5319 | ||
5320 | if (list && total_len <= list_size) { | |
5321 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5322 | memcpy(list + prefix_len, name, name_len); | |
5323 | list[prefix_len + name_len] = '\0'; | |
5324 | } | |
5325 | return total_len; | |
5326 | } | |
5327 | ||
5328 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5329 | void *buffer, size_t size) | |
5330 | { | |
5331 | if (strcmp(name, "") == 0) | |
5332 | return -EINVAL; | |
5333 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5334 | buffer, size); | |
5335 | } | |
5336 | ||
5337 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5338 | const void *value, size_t size, int flags) | |
5339 | { | |
5340 | if (strcmp(name, "") == 0) | |
5341 | return -EINVAL; | |
5342 | ||
5343 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5344 | size, flags); | |
5345 | } | |
5346 | ||
534eaddd TY |
5347 | int ocfs2_init_security_get(struct inode *inode, |
5348 | struct inode *dir, | |
5349 | struct ocfs2_security_xattr_info *si) | |
5350 | { | |
38d59ef6 TY |
5351 | /* check whether ocfs2 support feature xattr */ |
5352 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
5353 | return -EOPNOTSUPP; | |
534eaddd TY |
5354 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
5355 | &si->value_len); | |
5356 | } | |
5357 | ||
5358 | int ocfs2_init_security_set(handle_t *handle, | |
5359 | struct inode *inode, | |
5360 | struct buffer_head *di_bh, | |
5361 | struct ocfs2_security_xattr_info *si, | |
5362 | struct ocfs2_alloc_context *xattr_ac, | |
5363 | struct ocfs2_alloc_context *data_ac) | |
5364 | { | |
5365 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5366 | OCFS2_XATTR_INDEX_SECURITY, | |
5367 | si->name, si->value, si->value_len, 0, | |
5368 | xattr_ac, data_ac); | |
5369 | } | |
5370 | ||
923f7f31 TY |
5371 | struct xattr_handler ocfs2_xattr_security_handler = { |
5372 | .prefix = XATTR_SECURITY_PREFIX, | |
5373 | .list = ocfs2_xattr_security_list, | |
5374 | .get = ocfs2_xattr_security_get, | |
5375 | .set = ocfs2_xattr_security_set, | |
5376 | }; | |
5377 | ||
99219aea MF |
5378 | /* |
5379 | * 'trusted' attributes support | |
5380 | */ | |
99219aea MF |
5381 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5382 | size_t list_size, const char *name, | |
5383 | size_t name_len) | |
5384 | { | |
ceb1eba3 | 5385 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5386 | const size_t total_len = prefix_len + name_len + 1; |
5387 | ||
5388 | if (list && total_len <= list_size) { | |
5389 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5390 | memcpy(list + prefix_len, name, name_len); | |
5391 | list[prefix_len + name_len] = '\0'; | |
5392 | } | |
5393 | return total_len; | |
5394 | } | |
5395 | ||
5396 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5397 | void *buffer, size_t size) | |
5398 | { | |
5399 | if (strcmp(name, "") == 0) | |
5400 | return -EINVAL; | |
5401 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5402 | buffer, size); | |
5403 | } | |
5404 | ||
5405 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5406 | const void *value, size_t size, int flags) | |
5407 | { | |
5408 | if (strcmp(name, "") == 0) | |
5409 | return -EINVAL; | |
5410 | ||
5411 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5412 | size, flags); | |
5413 | } | |
5414 | ||
5415 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5416 | .prefix = XATTR_TRUSTED_PREFIX, | |
5417 | .list = ocfs2_xattr_trusted_list, | |
5418 | .get = ocfs2_xattr_trusted_get, | |
5419 | .set = ocfs2_xattr_trusted_set, | |
5420 | }; | |
5421 | ||
99219aea MF |
5422 | /* |
5423 | * 'user' attributes support | |
5424 | */ | |
99219aea MF |
5425 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5426 | size_t list_size, const char *name, | |
5427 | size_t name_len) | |
5428 | { | |
ceb1eba3 | 5429 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5430 | const size_t total_len = prefix_len + name_len + 1; |
5431 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5432 | ||
5433 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5434 | return 0; | |
5435 | ||
5436 | if (list && total_len <= list_size) { | |
5437 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5438 | memcpy(list + prefix_len, name, name_len); | |
5439 | list[prefix_len + name_len] = '\0'; | |
5440 | } | |
5441 | return total_len; | |
5442 | } | |
5443 | ||
5444 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5445 | void *buffer, size_t size) | |
5446 | { | |
5447 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5448 | ||
5449 | if (strcmp(name, "") == 0) | |
5450 | return -EINVAL; | |
5451 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5452 | return -EOPNOTSUPP; | |
5453 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5454 | buffer, size); | |
5455 | } | |
5456 | ||
5457 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5458 | const void *value, size_t size, int flags) | |
5459 | { | |
5460 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5461 | ||
5462 | if (strcmp(name, "") == 0) | |
5463 | return -EINVAL; | |
5464 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5465 | return -EOPNOTSUPP; | |
5466 | ||
5467 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5468 | size, flags); | |
5469 | } | |
5470 | ||
5471 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5472 | .prefix = XATTR_USER_PREFIX, | |
5473 | .list = ocfs2_xattr_user_list, | |
5474 | .get = ocfs2_xattr_user_get, | |
5475 | .set = ocfs2_xattr_user_set, | |
5476 | }; |