Commit | Line | Data |
---|---|---|
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, | |
9b7895ef | 515 | int *want_meta) |
89c38bd0 TY |
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 | 556 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 557 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
558 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
559 | } | |
560 | ||
561 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
562 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
563 | *want_clusters += 1; | |
564 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
565 | } | |
566 | ||
0e445b6f TY |
567 | /* |
568 | * reserve credits and clusters for xattrs which has large value | |
569 | * and have to be set outside | |
570 | */ | |
571 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
572 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
573 | si->value_len); | |
574 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
575 | new_clusters); | |
576 | *want_clusters += new_clusters; | |
577 | } | |
89c38bd0 TY |
578 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
579 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
580 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
581 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
582 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
583 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
584 | new_clusters); | |
585 | *want_clusters += new_clusters; | |
89c38bd0 TY |
586 | } |
587 | ||
588 | return ret; | |
589 | } | |
590 | ||
f56654c4 TM |
591 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
592 | u32 clusters_to_add, | |
19b801f4 | 593 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 594 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
595 | { |
596 | int status = 0; | |
85db90e7 | 597 | handle_t *handle = ctxt->handle; |
f56654c4 TM |
598 | enum ocfs2_alloc_restarted why; |
599 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
19b801f4 | 600 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 601 | struct ocfs2_extent_tree et; |
f56654c4 TM |
602 | |
603 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
604 | ||
19b801f4 | 605 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f99b9b7c | 606 | |
19b801f4 | 607 | status = vb->vb_access(handle, inode, vb->vb_bh, |
2a50a743 | 608 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
609 | if (status < 0) { |
610 | mlog_errno(status); | |
611 | goto leave; | |
612 | } | |
613 | ||
19b801f4 | 614 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
615 | status = ocfs2_add_clusters_in_btree(osb, |
616 | inode, | |
617 | &logical_start, | |
618 | clusters_to_add, | |
619 | 0, | |
f99b9b7c | 620 | &et, |
f56654c4 | 621 | handle, |
78f30c31 TM |
622 | ctxt->data_ac, |
623 | ctxt->meta_ac, | |
f99b9b7c | 624 | &why); |
85db90e7 TM |
625 | if (status < 0) { |
626 | mlog_errno(status); | |
f56654c4 TM |
627 | goto leave; |
628 | } | |
629 | ||
19b801f4 | 630 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
631 | if (status < 0) { |
632 | mlog_errno(status); | |
633 | goto leave; | |
634 | } | |
635 | ||
19b801f4 | 636 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 637 | |
85db90e7 TM |
638 | /* |
639 | * We should have already allocated enough space before the transaction, | |
640 | * so no need to restart. | |
641 | */ | |
642 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
643 | |
644 | leave: | |
f56654c4 TM |
645 | |
646 | return status; | |
647 | } | |
648 | ||
649 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 650 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 651 | u32 cpos, u32 phys_cpos, u32 len, |
78f30c31 | 652 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
653 | { |
654 | int ret; | |
655 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 656 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
657 | struct ocfs2_extent_tree et; |
658 | ||
d72cc72d | 659 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f56654c4 | 660 | |
d72cc72d JB |
661 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
662 | OCFS2_JOURNAL_ACCESS_WRITE); | |
f56654c4 TM |
663 | if (ret) { |
664 | mlog_errno(ret); | |
85db90e7 | 665 | goto out; |
f56654c4 TM |
666 | } |
667 | ||
78f30c31 TM |
668 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, |
669 | &ctxt->dealloc); | |
f56654c4 TM |
670 | if (ret) { |
671 | mlog_errno(ret); | |
85db90e7 | 672 | goto out; |
f56654c4 TM |
673 | } |
674 | ||
d72cc72d | 675 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 676 | |
d72cc72d | 677 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
678 | if (ret) { |
679 | mlog_errno(ret); | |
85db90e7 | 680 | goto out; |
f56654c4 TM |
681 | } |
682 | ||
78f30c31 | 683 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); |
f56654c4 TM |
684 | if (ret) |
685 | mlog_errno(ret); | |
686 | ||
f56654c4 | 687 | out: |
f56654c4 TM |
688 | return ret; |
689 | } | |
690 | ||
691 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
692 | u32 old_clusters, | |
693 | u32 new_clusters, | |
19b801f4 | 694 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 695 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
696 | { |
697 | int ret = 0; | |
698 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
699 | u64 block; | |
f56654c4 TM |
700 | |
701 | if (old_clusters <= new_clusters) | |
702 | return 0; | |
703 | ||
704 | cpos = new_clusters; | |
705 | trunc_len = old_clusters - new_clusters; | |
706 | while (trunc_len) { | |
707 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 708 | &alloc_size, |
19b801f4 | 709 | &vb->vb_xv->xr_list); |
f56654c4 TM |
710 | if (ret) { |
711 | mlog_errno(ret); | |
712 | goto out; | |
713 | } | |
714 | ||
715 | if (alloc_size > trunc_len) | |
716 | alloc_size = trunc_len; | |
717 | ||
19b801f4 | 718 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 719 | phys_cpos, alloc_size, |
78f30c31 | 720 | ctxt); |
f56654c4 TM |
721 | if (ret) { |
722 | mlog_errno(ret); | |
723 | goto out; | |
724 | } | |
725 | ||
726 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
727 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
728 | alloc_size); | |
729 | cpos += alloc_size; | |
730 | trunc_len -= alloc_size; | |
731 | } | |
732 | ||
733 | out: | |
f56654c4 TM |
734 | return ret; |
735 | } | |
736 | ||
737 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 738 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
739 | int len, |
740 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
741 | { |
742 | int ret; | |
743 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 744 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
745 | |
746 | if (new_clusters == old_clusters) | |
747 | return 0; | |
748 | ||
749 | if (new_clusters > old_clusters) | |
750 | ret = ocfs2_xattr_extend_allocation(inode, | |
751 | new_clusters - old_clusters, | |
b3e5d379 | 752 | vb, ctxt); |
f56654c4 TM |
753 | else |
754 | ret = ocfs2_xattr_shrink_size(inode, | |
755 | old_clusters, new_clusters, | |
b3e5d379 | 756 | vb, ctxt); |
f56654c4 TM |
757 | |
758 | return ret; | |
759 | } | |
cf1d6c76 | 760 | |
936b8834 TM |
761 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
762 | size_t *result, const char *prefix, | |
763 | const char *name, int name_len) | |
764 | { | |
765 | char *p = buffer + *result; | |
766 | int prefix_len = strlen(prefix); | |
767 | int total_len = prefix_len + name_len + 1; | |
768 | ||
769 | *result += total_len; | |
770 | ||
771 | /* we are just looking for how big our buffer needs to be */ | |
772 | if (!size) | |
773 | return 0; | |
774 | ||
775 | if (*result > size) | |
776 | return -ERANGE; | |
777 | ||
778 | memcpy(p, prefix, prefix_len); | |
779 | memcpy(p + prefix_len, name, name_len); | |
780 | p[prefix_len + name_len] = '\0'; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
cf1d6c76 TY |
785 | static int ocfs2_xattr_list_entries(struct inode *inode, |
786 | struct ocfs2_xattr_header *header, | |
787 | char *buffer, size_t buffer_size) | |
788 | { | |
936b8834 TM |
789 | size_t result = 0; |
790 | int i, type, ret; | |
791 | const char *prefix, *name; | |
cf1d6c76 TY |
792 | |
793 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
794 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
795 | type = ocfs2_xattr_get_type(entry); |
796 | prefix = ocfs2_xattr_prefix(type); | |
797 | ||
798 | if (prefix) { | |
799 | name = (const char *)header + | |
800 | le16_to_cpu(entry->xe_name_offset); | |
801 | ||
802 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
803 | &result, prefix, name, | |
804 | entry->xe_name_len); | |
805 | if (ret) | |
806 | return ret; | |
cf1d6c76 TY |
807 | } |
808 | } | |
809 | ||
936b8834 | 810 | return result; |
cf1d6c76 TY |
811 | } |
812 | ||
813 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
814 | struct ocfs2_dinode *di, | |
815 | char *buffer, | |
816 | size_t buffer_size) | |
817 | { | |
818 | struct ocfs2_xattr_header *header = NULL; | |
819 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
820 | int ret = 0; | |
821 | ||
822 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
823 | return ret; | |
824 | ||
825 | header = (struct ocfs2_xattr_header *) | |
826 | ((void *)di + inode->i_sb->s_blocksize - | |
827 | le16_to_cpu(di->i_xattr_inline_size)); | |
828 | ||
829 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
830 | ||
831 | return ret; | |
832 | } | |
833 | ||
834 | static int ocfs2_xattr_block_list(struct inode *inode, | |
835 | struct ocfs2_dinode *di, | |
836 | char *buffer, | |
837 | size_t buffer_size) | |
838 | { | |
839 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 840 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
841 | int ret = 0; |
842 | ||
843 | if (!di->i_xattr_loc) | |
844 | return ret; | |
845 | ||
4ae1d69b JB |
846 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
847 | &blk_bh); | |
cf1d6c76 TY |
848 | if (ret < 0) { |
849 | mlog_errno(ret); | |
850 | return ret; | |
851 | } | |
cf1d6c76 | 852 | |
0c044f0b | 853 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
854 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
855 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
856 | ret = ocfs2_xattr_list_entries(inode, header, | |
857 | buffer, buffer_size); | |
858 | } else { | |
859 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
860 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
861 | buffer, buffer_size); | |
862 | } | |
4ae1d69b | 863 | |
cf1d6c76 TY |
864 | brelse(blk_bh); |
865 | ||
866 | return ret; | |
867 | } | |
868 | ||
869 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
870 | char *buffer, | |
871 | size_t size) | |
872 | { | |
873 | int ret = 0, i_ret = 0, b_ret = 0; | |
874 | struct buffer_head *di_bh = NULL; | |
875 | struct ocfs2_dinode *di = NULL; | |
876 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
877 | ||
8154da3d TY |
878 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
879 | return -EOPNOTSUPP; | |
880 | ||
cf1d6c76 TY |
881 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
882 | return ret; | |
883 | ||
884 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
885 | if (ret < 0) { | |
886 | mlog_errno(ret); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
891 | ||
892 | down_read(&oi->ip_xattr_sem); | |
893 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
894 | if (i_ret < 0) | |
895 | b_ret = 0; | |
896 | else { | |
897 | if (buffer) { | |
898 | buffer += i_ret; | |
899 | size -= i_ret; | |
900 | } | |
901 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
902 | buffer, size); | |
903 | if (b_ret < 0) | |
904 | i_ret = 0; | |
905 | } | |
906 | up_read(&oi->ip_xattr_sem); | |
907 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
908 | ||
909 | brelse(di_bh); | |
910 | ||
911 | return i_ret + b_ret; | |
912 | } | |
913 | ||
914 | static int ocfs2_xattr_find_entry(int name_index, | |
915 | const char *name, | |
916 | struct ocfs2_xattr_search *xs) | |
917 | { | |
918 | struct ocfs2_xattr_entry *entry; | |
919 | size_t name_len; | |
920 | int i, cmp = 1; | |
921 | ||
922 | if (name == NULL) | |
923 | return -EINVAL; | |
924 | ||
925 | name_len = strlen(name); | |
926 | entry = xs->here; | |
927 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
928 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
929 | if (!cmp) | |
930 | cmp = name_len - entry->xe_name_len; | |
931 | if (!cmp) | |
932 | cmp = memcmp(name, (xs->base + | |
933 | le16_to_cpu(entry->xe_name_offset)), | |
934 | name_len); | |
935 | if (cmp == 0) | |
936 | break; | |
937 | entry += 1; | |
938 | } | |
939 | xs->here = entry; | |
940 | ||
941 | return cmp ? -ENODATA : 0; | |
942 | } | |
943 | ||
944 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 945 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
946 | void *buffer, |
947 | size_t len) | |
948 | { | |
949 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
950 | u64 blkno; | |
951 | int i, ret = 0; | |
952 | size_t cplen, blocksize; | |
953 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
954 | struct ocfs2_extent_list *el; |
955 | ||
cf1d6c76 TY |
956 | el = &xv->xr_list; |
957 | clusters = le32_to_cpu(xv->xr_clusters); | |
958 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
959 | blocksize = inode->i_sb->s_blocksize; | |
960 | ||
961 | cpos = 0; | |
962 | while (cpos < clusters) { | |
963 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
964 | &num_clusters, el); | |
965 | if (ret) { | |
966 | mlog_errno(ret); | |
967 | goto out; | |
968 | } | |
969 | ||
970 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
971 | /* Copy ocfs2_xattr_value */ | |
972 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 973 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
974 | if (ret) { |
975 | mlog_errno(ret); | |
976 | goto out; | |
977 | } | |
978 | ||
979 | cplen = len >= blocksize ? blocksize : len; | |
980 | memcpy(buffer, bh->b_data, cplen); | |
981 | len -= cplen; | |
982 | buffer += cplen; | |
983 | ||
984 | brelse(bh); | |
985 | bh = NULL; | |
986 | if (len == 0) | |
987 | break; | |
988 | } | |
989 | cpos += num_clusters; | |
990 | } | |
991 | out: | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
996 | int name_index, | |
997 | const char *name, | |
998 | void *buffer, | |
999 | size_t buffer_size, | |
1000 | struct ocfs2_xattr_search *xs) | |
1001 | { | |
1002 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1003 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1004 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1005 | size_t size; |
1006 | int ret = 0; | |
1007 | ||
1008 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1009 | return -ENODATA; | |
1010 | ||
1011 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1012 | xs->header = (struct ocfs2_xattr_header *) | |
1013 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1014 | xs->base = (void *)xs->header; | |
1015 | xs->here = xs->header->xh_entries; | |
1016 | ||
1017 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1018 | if (ret) | |
1019 | return ret; | |
1020 | size = le64_to_cpu(xs->here->xe_value_size); | |
1021 | if (buffer) { | |
1022 | if (size > buffer_size) | |
1023 | return -ERANGE; | |
1024 | if (ocfs2_xattr_is_local(xs->here)) { | |
1025 | memcpy(buffer, (void *)xs->base + | |
1026 | le16_to_cpu(xs->here->xe_name_offset) + | |
1027 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1028 | } else { | |
589dc260 TM |
1029 | xv = (struct ocfs2_xattr_value_root *) |
1030 | (xs->base + le16_to_cpu( | |
1031 | xs->here->xe_name_offset) + | |
1032 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1033 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1034 | buffer, size); |
1035 | if (ret < 0) { | |
1036 | mlog_errno(ret); | |
1037 | return ret; | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | return size; | |
1043 | } | |
1044 | ||
1045 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1046 | int name_index, | |
1047 | const char *name, | |
1048 | void *buffer, | |
1049 | size_t buffer_size, | |
1050 | struct ocfs2_xattr_search *xs) | |
1051 | { | |
cf1d6c76 | 1052 | struct ocfs2_xattr_block *xb; |
589dc260 | 1053 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1054 | size_t size; |
589dc260 | 1055 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 | 1056 | |
ba937127 JB |
1057 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1058 | if (!xs->bucket) { | |
1059 | ret = -ENOMEM; | |
1060 | mlog_errno(ret); | |
1061 | goto cleanup; | |
1062 | } | |
589dc260 | 1063 | |
54f443f4 JB |
1064 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1065 | if (ret) { | |
cf1d6c76 | 1066 | mlog_errno(ret); |
cf1d6c76 TY |
1067 | goto cleanup; |
1068 | } | |
1069 | ||
6c1e183e TY |
1070 | if (xs->not_found) { |
1071 | ret = -ENODATA; | |
1072 | goto cleanup; | |
1073 | } | |
1074 | ||
54f443f4 | 1075 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1076 | size = le64_to_cpu(xs->here->xe_value_size); |
1077 | if (buffer) { | |
1078 | ret = -ERANGE; | |
1079 | if (size > buffer_size) | |
1080 | goto cleanup; | |
589dc260 TM |
1081 | |
1082 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1083 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1084 | i = xs->here - xs->header->xh_entries; | |
1085 | ||
1086 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
1087 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 1088 | bucket_xh(xs->bucket), |
589dc260 TM |
1089 | i, |
1090 | &block_off, | |
1091 | &name_offset); | |
ba937127 | 1092 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1093 | } |
cf1d6c76 TY |
1094 | if (ocfs2_xattr_is_local(xs->here)) { |
1095 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1096 | name_offset + name_len, size); |
cf1d6c76 | 1097 | } else { |
589dc260 TM |
1098 | xv = (struct ocfs2_xattr_value_root *) |
1099 | (xs->base + name_offset + name_len); | |
1100 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1101 | buffer, size); |
1102 | if (ret < 0) { | |
1103 | mlog_errno(ret); | |
1104 | goto cleanup; | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | ret = size; | |
1109 | cleanup: | |
ba937127 | 1110 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1111 | |
54f443f4 JB |
1112 | brelse(xs->xattr_bh); |
1113 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1114 | return ret; |
1115 | } | |
1116 | ||
4e3e9d02 TY |
1117 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1118 | struct buffer_head *di_bh, | |
0030e001 TY |
1119 | int name_index, |
1120 | const char *name, | |
1121 | void *buffer, | |
1122 | size_t buffer_size) | |
cf1d6c76 TY |
1123 | { |
1124 | int ret; | |
1125 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1126 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1127 | struct ocfs2_xattr_search xis = { | |
1128 | .not_found = -ENODATA, | |
1129 | }; | |
1130 | struct ocfs2_xattr_search xbs = { | |
1131 | .not_found = -ENODATA, | |
1132 | }; | |
1133 | ||
8154da3d TY |
1134 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1135 | return -EOPNOTSUPP; | |
1136 | ||
cf1d6c76 TY |
1137 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1138 | ret = -ENODATA; | |
1139 | ||
cf1d6c76 TY |
1140 | xis.inode_bh = xbs.inode_bh = di_bh; |
1141 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1142 | ||
1143 | down_read(&oi->ip_xattr_sem); | |
1144 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1145 | buffer_size, &xis); | |
6c1e183e | 1146 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1147 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1148 | buffer_size, &xbs); | |
1149 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1150 | |
1151 | return ret; | |
1152 | } | |
1153 | ||
1154 | /* ocfs2_xattr_get() | |
1155 | * | |
1156 | * Copy an extended attribute into the buffer provided. | |
1157 | * Buffer is NULL to compute the size of buffer required. | |
1158 | */ | |
1159 | static int ocfs2_xattr_get(struct inode *inode, | |
1160 | int name_index, | |
1161 | const char *name, | |
1162 | void *buffer, | |
1163 | size_t buffer_size) | |
1164 | { | |
1165 | int ret; | |
1166 | struct buffer_head *di_bh = NULL; | |
1167 | ||
1168 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1169 | if (ret < 0) { | |
1170 | mlog_errno(ret); | |
1171 | return ret; | |
1172 | } | |
1173 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1174 | name, buffer, buffer_size); | |
1175 | ||
cf1d6c76 TY |
1176 | ocfs2_inode_unlock(inode, 0); |
1177 | ||
1178 | brelse(di_bh); | |
1179 | ||
1180 | return ret; | |
1181 | } | |
1182 | ||
1183 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1184 | handle_t *handle, |
cf1d6c76 TY |
1185 | struct ocfs2_xattr_value_root *xv, |
1186 | const void *value, | |
1187 | int value_len) | |
1188 | { | |
71d548a6 | 1189 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1190 | u16 blocksize = inode->i_sb->s_blocksize; |
1191 | u32 p_cluster, num_clusters; | |
1192 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1193 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1194 | u64 blkno; | |
1195 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1196 | |
1197 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1198 | ||
cf1d6c76 TY |
1199 | while (cpos < clusters) { |
1200 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1201 | &num_clusters, &xv->xr_list); | |
1202 | if (ret) { | |
1203 | mlog_errno(ret); | |
85db90e7 | 1204 | goto out; |
cf1d6c76 TY |
1205 | } |
1206 | ||
1207 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1208 | ||
1209 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 1210 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
1211 | if (ret) { |
1212 | mlog_errno(ret); | |
85db90e7 | 1213 | goto out; |
cf1d6c76 TY |
1214 | } |
1215 | ||
1216 | ret = ocfs2_journal_access(handle, | |
1217 | inode, | |
1218 | bh, | |
1219 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1220 | if (ret < 0) { | |
1221 | mlog_errno(ret); | |
85db90e7 | 1222 | goto out; |
cf1d6c76 TY |
1223 | } |
1224 | ||
1225 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1226 | memcpy(bh->b_data, value, cp_len); | |
1227 | value_len -= cp_len; | |
1228 | value += cp_len; | |
1229 | if (cp_len < blocksize) | |
1230 | memset(bh->b_data + cp_len, 0, | |
1231 | blocksize - cp_len); | |
1232 | ||
1233 | ret = ocfs2_journal_dirty(handle, bh); | |
1234 | if (ret < 0) { | |
1235 | mlog_errno(ret); | |
85db90e7 | 1236 | goto out; |
cf1d6c76 TY |
1237 | } |
1238 | brelse(bh); | |
1239 | bh = NULL; | |
1240 | ||
1241 | /* | |
1242 | * XXX: do we need to empty all the following | |
1243 | * blocks in this cluster? | |
1244 | */ | |
1245 | if (!value_len) | |
1246 | break; | |
1247 | } | |
1248 | cpos += num_clusters; | |
1249 | } | |
cf1d6c76 TY |
1250 | out: |
1251 | brelse(bh); | |
1252 | ||
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1257 | handle_t *handle, |
cf1d6c76 TY |
1258 | struct ocfs2_xattr_info *xi, |
1259 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1260 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1261 | size_t offs) |
1262 | { | |
cf1d6c76 TY |
1263 | int ret = 0; |
1264 | size_t name_len = strlen(xi->name); | |
1265 | void *val = xs->base + offs; | |
1266 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1267 | ||
512620f4 JB |
1268 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
1269 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1270 | if (ret) { |
1271 | mlog_errno(ret); | |
85db90e7 | 1272 | goto out; |
cf1d6c76 TY |
1273 | } |
1274 | /* Decrease xattr count */ | |
1275 | le16_add_cpu(&xs->header->xh_count, -1); | |
1276 | /* Remove the xattr entry and tree root which has already be set*/ | |
1277 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1278 | memset(val, 0, size); | |
1279 | ||
512620f4 | 1280 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1281 | if (ret < 0) |
1282 | mlog_errno(ret); | |
cf1d6c76 TY |
1283 | out: |
1284 | return ret; | |
1285 | } | |
1286 | ||
1287 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1288 | handle_t *handle, |
cf1d6c76 TY |
1289 | struct ocfs2_xattr_info *xi, |
1290 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1291 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1292 | size_t offs) |
1293 | { | |
85db90e7 | 1294 | int ret; |
cf1d6c76 | 1295 | |
0c748e95 JB |
1296 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
1297 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1298 | if (ret) { |
1299 | mlog_errno(ret); | |
85db90e7 | 1300 | goto out; |
cf1d6c76 TY |
1301 | } |
1302 | ||
1303 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1304 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1305 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1306 | ocfs2_xattr_set_local(xs->here, 1); | |
1307 | else | |
1308 | ocfs2_xattr_set_local(xs->here, 0); | |
1309 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1310 | ||
0c748e95 | 1311 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1312 | if (ret < 0) |
1313 | mlog_errno(ret); | |
cf1d6c76 TY |
1314 | out: |
1315 | return ret; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * ocfs2_xattr_set_value_outside() | |
1320 | * | |
1321 | * Set large size value in B tree. | |
1322 | */ | |
1323 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1324 | struct ocfs2_xattr_info *xi, | |
1325 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1326 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1327 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1328 | size_t offs) |
1329 | { | |
1330 | size_t name_len = strlen(xi->name); | |
1331 | void *val = xs->base + offs; | |
1332 | struct ocfs2_xattr_value_root *xv = NULL; | |
1333 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1334 | int ret = 0; | |
1335 | ||
1336 | memset(val, 0, size); | |
1337 | memcpy(val, xi->name, name_len); | |
1338 | xv = (struct ocfs2_xattr_value_root *) | |
1339 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1340 | xv->xr_clusters = 0; | |
1341 | xv->xr_last_eb_blk = 0; | |
1342 | xv->xr_list.l_tree_depth = 0; | |
1343 | xv->xr_list.l_count = cpu_to_le16(1); | |
1344 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1345 | vb->vb_xv = xv; |
cf1d6c76 | 1346 | |
512620f4 | 1347 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt); |
cf1d6c76 TY |
1348 | if (ret < 0) { |
1349 | mlog_errno(ret); | |
1350 | return ret; | |
1351 | } | |
512620f4 | 1352 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1353 | if (ret < 0) { |
1354 | mlog_errno(ret); | |
1355 | return ret; | |
1356 | } | |
512620f4 | 1357 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb->vb_xv, |
85db90e7 | 1358 | xi->value, xi->value_len); |
cf1d6c76 TY |
1359 | if (ret < 0) |
1360 | mlog_errno(ret); | |
1361 | ||
1362 | return ret; | |
1363 | } | |
1364 | ||
1365 | /* | |
1366 | * ocfs2_xattr_set_entry_local() | |
1367 | * | |
1368 | * Set, replace or remove extended attribute in local. | |
1369 | */ | |
1370 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1371 | struct ocfs2_xattr_info *xi, | |
1372 | struct ocfs2_xattr_search *xs, | |
1373 | struct ocfs2_xattr_entry *last, | |
1374 | size_t min_offs) | |
1375 | { | |
1376 | size_t name_len = strlen(xi->name); | |
1377 | int i; | |
1378 | ||
1379 | if (xi->value && xs->not_found) { | |
1380 | /* Insert the new xattr entry. */ | |
1381 | le16_add_cpu(&xs->header->xh_count, 1); | |
1382 | ocfs2_xattr_set_type(last, xi->name_index); | |
1383 | ocfs2_xattr_set_local(last, 1); | |
1384 | last->xe_name_len = name_len; | |
1385 | } else { | |
1386 | void *first_val; | |
1387 | void *val; | |
1388 | size_t offs, size; | |
1389 | ||
1390 | first_val = xs->base + min_offs; | |
1391 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1392 | val = xs->base + offs; | |
1393 | ||
1394 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1395 | OCFS2_XATTR_INLINE_SIZE) | |
1396 | size = OCFS2_XATTR_SIZE(name_len) + | |
1397 | OCFS2_XATTR_ROOT_SIZE; | |
1398 | else | |
1399 | size = OCFS2_XATTR_SIZE(name_len) + | |
1400 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1401 | ||
1402 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1403 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1404 | /* The old and the new value have the | |
1405 | same size. Just replace the value. */ | |
1406 | ocfs2_xattr_set_local(xs->here, 1); | |
1407 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1408 | /* Clear value bytes. */ | |
1409 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1410 | 0, | |
1411 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1412 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1413 | xi->value, | |
1414 | xi->value_len); | |
1415 | return; | |
1416 | } | |
1417 | /* Remove the old name+value. */ | |
1418 | memmove(first_val + size, first_val, val - first_val); | |
1419 | memset(first_val, 0, size); | |
1420 | xs->here->xe_name_hash = 0; | |
1421 | xs->here->xe_name_offset = 0; | |
1422 | ocfs2_xattr_set_local(xs->here, 1); | |
1423 | xs->here->xe_value_size = 0; | |
1424 | ||
1425 | min_offs += size; | |
1426 | ||
1427 | /* Adjust all value offsets. */ | |
1428 | last = xs->header->xh_entries; | |
1429 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1430 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1431 | ||
1432 | if (o < offs) | |
1433 | last->xe_name_offset = cpu_to_le16(o + size); | |
1434 | last += 1; | |
1435 | } | |
1436 | ||
1437 | if (!xi->value) { | |
1438 | /* Remove the old entry. */ | |
1439 | last -= 1; | |
1440 | memmove(xs->here, xs->here + 1, | |
1441 | (void *)last - (void *)xs->here); | |
1442 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1443 | le16_add_cpu(&xs->header->xh_count, -1); | |
1444 | } | |
1445 | } | |
1446 | if (xi->value) { | |
1447 | /* Insert the new name+value. */ | |
1448 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1449 | OCFS2_XATTR_SIZE(xi->value_len); | |
1450 | void *val = xs->base + min_offs - size; | |
1451 | ||
1452 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1453 | memset(val, 0, size); | |
1454 | memcpy(val, xi->name, name_len); | |
1455 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1456 | xi->value, | |
1457 | xi->value_len); | |
1458 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1459 | ocfs2_xattr_set_local(xs->here, 1); | |
1460 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1461 | } | |
1462 | ||
1463 | return; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * ocfs2_xattr_set_entry() | |
1468 | * | |
1469 | * Set extended attribute entry into inode or block. | |
1470 | * | |
1471 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1472 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1473 | * then set value in B tree with set_value_outside(). | |
1474 | */ | |
1475 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1476 | struct ocfs2_xattr_info *xi, | |
1477 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1478 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1479 | int flag) |
1480 | { | |
1481 | struct ocfs2_xattr_entry *last; | |
1482 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1483 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1484 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1485 | size_t size_l = 0; | |
85db90e7 | 1486 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1487 | int free, i, ret; |
1488 | struct ocfs2_xattr_info xi_l = { | |
1489 | .name_index = xi->name_index, | |
1490 | .name = xi->name, | |
1491 | .value = xi->value, | |
1492 | .value_len = xi->value_len, | |
1493 | }; | |
512620f4 JB |
1494 | struct ocfs2_xattr_value_buf vb = { |
1495 | .vb_bh = xs->xattr_bh, | |
1496 | .vb_access = ocfs2_journal_access_di, | |
1497 | }; | |
1498 | ||
1499 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1500 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1501 | vb.vb_access = ocfs2_journal_access_xb; | |
1502 | } else | |
1503 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1504 | |
1505 | /* Compute min_offs, last and free space. */ | |
1506 | last = xs->header->xh_entries; | |
1507 | ||
1508 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1509 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1510 | if (offs < min_offs) | |
1511 | min_offs = offs; | |
1512 | last += 1; | |
1513 | } | |
1514 | ||
4442f518 | 1515 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1516 | if (free < 0) |
b37c4d84 | 1517 | return -EIO; |
cf1d6c76 TY |
1518 | |
1519 | if (!xs->not_found) { | |
1520 | size_t size = 0; | |
1521 | if (ocfs2_xattr_is_local(xs->here)) | |
1522 | size = OCFS2_XATTR_SIZE(name_len) + | |
1523 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1524 | else | |
1525 | size = OCFS2_XATTR_SIZE(name_len) + | |
1526 | OCFS2_XATTR_ROOT_SIZE; | |
1527 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1528 | } | |
1529 | /* Check free space in inode or block */ | |
1530 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1531 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1532 | OCFS2_XATTR_SIZE(name_len) + | |
1533 | OCFS2_XATTR_ROOT_SIZE) { | |
1534 | ret = -ENOSPC; | |
1535 | goto out; | |
1536 | } | |
1537 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1538 | xi_l.value = (void *)&def_xv; | |
1539 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1540 | } else if (xi->value) { | |
1541 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1542 | OCFS2_XATTR_SIZE(name_len) + | |
1543 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1544 | ret = -ENOSPC; | |
1545 | goto out; | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | if (!xs->not_found) { | |
1550 | /* For existing extended attribute */ | |
1551 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1552 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1553 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1554 | void *val = xs->base + offs; | |
1555 | ||
1556 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1557 | /* Replace existing local xattr with tree root */ | |
1558 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1559 | ctxt, &vb, offs); |
cf1d6c76 TY |
1560 | if (ret < 0) |
1561 | mlog_errno(ret); | |
1562 | goto out; | |
1563 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1564 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1565 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1566 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 TY |
1567 | |
1568 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1569 | /* | |
1570 | * If new value need set outside also, | |
1571 | * first truncate old value to new value, | |
1572 | * then set new value with set_value_outside(). | |
1573 | */ | |
1574 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1575 | &vb, |
78f30c31 TM |
1576 | xi->value_len, |
1577 | ctxt); | |
cf1d6c76 TY |
1578 | if (ret < 0) { |
1579 | mlog_errno(ret); | |
1580 | goto out; | |
1581 | } | |
1582 | ||
85db90e7 TM |
1583 | ret = ocfs2_xattr_update_entry(inode, |
1584 | handle, | |
1585 | xi, | |
1586 | xs, | |
0c748e95 | 1587 | &vb, |
85db90e7 | 1588 | offs); |
cf1d6c76 TY |
1589 | if (ret < 0) { |
1590 | mlog_errno(ret); | |
1591 | goto out; | |
1592 | } | |
1593 | ||
85db90e7 TM |
1594 | ret = __ocfs2_xattr_set_value_outside(inode, |
1595 | handle, | |
b3e5d379 | 1596 | vb.vb_xv, |
85db90e7 TM |
1597 | xi->value, |
1598 | xi->value_len); | |
cf1d6c76 TY |
1599 | if (ret < 0) |
1600 | mlog_errno(ret); | |
1601 | goto out; | |
1602 | } else { | |
1603 | /* | |
1604 | * If new value need set in local, | |
1605 | * just trucate old value to zero. | |
1606 | */ | |
1607 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1608 | &vb, |
85db90e7 TM |
1609 | 0, |
1610 | ctxt); | |
cf1d6c76 TY |
1611 | if (ret < 0) |
1612 | mlog_errno(ret); | |
1613 | } | |
1614 | } | |
1615 | } | |
1616 | ||
512620f4 JB |
1617 | ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh, |
1618 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1619 | if (ret) { |
1620 | mlog_errno(ret); | |
85db90e7 | 1621 | goto out; |
cf1d6c76 TY |
1622 | } |
1623 | ||
1624 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
512620f4 JB |
1625 | ret = vb.vb_access(handle, inode, vb.vb_bh, |
1626 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1627 | if (ret) { |
1628 | mlog_errno(ret); | |
85db90e7 | 1629 | goto out; |
cf1d6c76 TY |
1630 | } |
1631 | } | |
1632 | ||
1633 | /* | |
1634 | * Set value in local, include set tree root in local. | |
1635 | * This is the first step for value size >INLINE_SIZE. | |
1636 | */ | |
1637 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1638 | ||
1639 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1640 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1641 | if (ret < 0) { | |
1642 | mlog_errno(ret); | |
85db90e7 | 1643 | goto out; |
cf1d6c76 TY |
1644 | } |
1645 | } | |
1646 | ||
1647 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1648 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1649 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1650 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1651 | ||
1652 | /* | |
1653 | * Adjust extent record count or inline data size | |
1654 | * to reserve space for extended attribute. | |
1655 | */ | |
1656 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1657 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1658 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1659 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1660 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1661 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1662 | sizeof(struct ocfs2_extent_rec))); | |
1663 | } | |
1664 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1665 | } | |
1666 | /* Update xattr flag */ | |
1667 | spin_lock(&oi->ip_lock); | |
1668 | oi->ip_dyn_features |= flag; | |
1669 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1670 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1671 | |
1672 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1673 | if (ret < 0) | |
1674 | mlog_errno(ret); | |
1675 | ||
cf1d6c76 TY |
1676 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1677 | /* | |
1678 | * Set value outside in B tree. | |
1679 | * This is the second step for value size > INLINE_SIZE. | |
1680 | */ | |
1681 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1682 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1683 | &vb, offs); | |
cf1d6c76 TY |
1684 | if (ret < 0) { |
1685 | int ret2; | |
1686 | ||
1687 | mlog_errno(ret); | |
1688 | /* | |
1689 | * If set value outside failed, we have to clean | |
1690 | * the junk tree root we have already set in local. | |
1691 | */ | |
85db90e7 | 1692 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1693 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1694 | if (ret2 < 0) |
1695 | mlog_errno(ret2); | |
1696 | } | |
1697 | } | |
1698 | out: | |
1699 | return ret; | |
cf1d6c76 TY |
1700 | } |
1701 | ||
cf1d6c76 | 1702 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 1703 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1704 | struct ocfs2_xattr_header *header) |
1705 | { | |
1706 | int ret = 0, i; | |
78f30c31 TM |
1707 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1708 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
1709 | ||
1710 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 | 1711 | |
a90714c1 JK |
1712 | ctxt.handle = ocfs2_start_trans(osb, |
1713 | ocfs2_remove_extent_credits(osb->sb)); | |
85db90e7 TM |
1714 | if (IS_ERR(ctxt.handle)) { |
1715 | ret = PTR_ERR(ctxt.handle); | |
1716 | mlog_errno(ret); | |
1717 | goto out; | |
1718 | } | |
1719 | ||
cf1d6c76 TY |
1720 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
1721 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1722 | ||
1723 | if (!ocfs2_xattr_is_local(entry)) { | |
cf1d6c76 TY |
1724 | void *val; |
1725 | ||
1726 | val = (void *)header + | |
1727 | le16_to_cpu(entry->xe_name_offset); | |
4311901d | 1728 | vb->vb_xv = (struct ocfs2_xattr_value_root *) |
cf1d6c76 | 1729 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); |
4311901d | 1730 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); |
cf1d6c76 TY |
1731 | if (ret < 0) { |
1732 | mlog_errno(ret); | |
78f30c31 | 1733 | break; |
cf1d6c76 TY |
1734 | } |
1735 | } | |
1736 | } | |
1737 | ||
85db90e7 | 1738 | ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
1739 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1740 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 1741 | out: |
cf1d6c76 TY |
1742 | return ret; |
1743 | } | |
1744 | ||
1745 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1746 | struct buffer_head *di_bh) | |
1747 | { | |
1748 | ||
1749 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1750 | struct ocfs2_xattr_header *header; | |
1751 | int ret; | |
4311901d JB |
1752 | struct ocfs2_xattr_value_buf vb = { |
1753 | .vb_bh = di_bh, | |
1754 | .vb_access = ocfs2_journal_access_di, | |
1755 | }; | |
cf1d6c76 TY |
1756 | |
1757 | header = (struct ocfs2_xattr_header *) | |
1758 | ((void *)di + inode->i_sb->s_blocksize - | |
1759 | le16_to_cpu(di->i_xattr_inline_size)); | |
1760 | ||
4311901d | 1761 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
cf1d6c76 TY |
1762 | |
1763 | return ret; | |
1764 | } | |
1765 | ||
1766 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1767 | struct buffer_head *blk_bh) | |
1768 | { | |
1769 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 1770 | int ret = 0; |
4311901d JB |
1771 | struct ocfs2_xattr_value_buf vb = { |
1772 | .vb_bh = blk_bh, | |
1773 | .vb_access = ocfs2_journal_access_xb, | |
1774 | }; | |
cf1d6c76 TY |
1775 | |
1776 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1777 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1778 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
4311901d | 1779 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
a3944256 TM |
1780 | } else |
1781 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1782 | |
1783 | return ret; | |
1784 | } | |
1785 | ||
08413899 TM |
1786 | static int ocfs2_xattr_free_block(struct inode *inode, |
1787 | u64 block) | |
1788 | { | |
1789 | struct inode *xb_alloc_inode; | |
1790 | struct buffer_head *xb_alloc_bh = NULL; | |
1791 | struct buffer_head *blk_bh = NULL; | |
1792 | struct ocfs2_xattr_block *xb; | |
1793 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1794 | handle_t *handle; | |
1795 | int ret = 0; | |
1796 | u64 blk, bg_blkno; | |
1797 | u16 bit; | |
1798 | ||
4ae1d69b | 1799 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1800 | if (ret < 0) { |
1801 | mlog_errno(ret); | |
1802 | goto out; | |
1803 | } | |
1804 | ||
08413899 TM |
1805 | ret = ocfs2_xattr_block_remove(inode, blk_bh); |
1806 | if (ret < 0) { | |
1807 | mlog_errno(ret); | |
1808 | goto out; | |
1809 | } | |
1810 | ||
4ae1d69b | 1811 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1812 | blk = le64_to_cpu(xb->xb_blkno); |
1813 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1814 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1815 | ||
1816 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1817 | EXTENT_ALLOC_SYSTEM_INODE, | |
1818 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1819 | if (!xb_alloc_inode) { | |
1820 | ret = -ENOMEM; | |
1821 | mlog_errno(ret); | |
1822 | goto out; | |
1823 | } | |
1824 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1825 | ||
1826 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1827 | if (ret < 0) { | |
1828 | mlog_errno(ret); | |
1829 | goto out_mutex; | |
1830 | } | |
1831 | ||
1832 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1833 | if (IS_ERR(handle)) { | |
1834 | ret = PTR_ERR(handle); | |
1835 | mlog_errno(ret); | |
1836 | goto out_unlock; | |
1837 | } | |
1838 | ||
1839 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1840 | bit, bg_blkno, 1); | |
1841 | if (ret < 0) | |
1842 | mlog_errno(ret); | |
1843 | ||
1844 | ocfs2_commit_trans(osb, handle); | |
1845 | out_unlock: | |
1846 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1847 | brelse(xb_alloc_bh); | |
1848 | out_mutex: | |
1849 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1850 | iput(xb_alloc_inode); | |
1851 | out: | |
1852 | brelse(blk_bh); | |
1853 | return ret; | |
1854 | } | |
1855 | ||
cf1d6c76 TY |
1856 | /* |
1857 | * ocfs2_xattr_remove() | |
1858 | * | |
1859 | * Free extended attribute resources associated with this inode. | |
1860 | */ | |
1861 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1862 | { | |
cf1d6c76 TY |
1863 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1864 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1865 | handle_t *handle; | |
1866 | int ret; | |
1867 | ||
8154da3d TY |
1868 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1869 | return 0; | |
1870 | ||
cf1d6c76 TY |
1871 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1872 | return 0; | |
1873 | ||
1874 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1875 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1876 | if (ret < 0) { | |
1877 | mlog_errno(ret); | |
1878 | goto out; | |
1879 | } | |
1880 | } | |
cf1d6c76 | 1881 | |
08413899 TM |
1882 | if (di->i_xattr_loc) { |
1883 | ret = ocfs2_xattr_free_block(inode, | |
1884 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1885 | if (ret < 0) { |
1886 | mlog_errno(ret); | |
1887 | goto out; | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1892 | OCFS2_INODE_UPDATE_CREDITS); | |
1893 | if (IS_ERR(handle)) { | |
1894 | ret = PTR_ERR(handle); | |
1895 | mlog_errno(ret); | |
1896 | goto out; | |
1897 | } | |
84008972 JB |
1898 | ret = ocfs2_journal_access_di(handle, inode, di_bh, |
1899 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1900 | if (ret) { |
1901 | mlog_errno(ret); | |
1902 | goto out_commit; | |
1903 | } | |
1904 | ||
08413899 | 1905 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1906 | |
1907 | spin_lock(&oi->ip_lock); | |
1908 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1909 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1910 | spin_unlock(&oi->ip_lock); | |
1911 | ||
1912 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1913 | if (ret < 0) | |
1914 | mlog_errno(ret); | |
1915 | out_commit: | |
1916 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1917 | out: | |
cf1d6c76 TY |
1918 | return ret; |
1919 | } | |
1920 | ||
1921 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1922 | struct ocfs2_dinode *di) | |
1923 | { | |
1924 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1925 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1926 | int free; | |
1927 | ||
1928 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1929 | return 0; | |
1930 | ||
1931 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1932 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1933 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1934 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1935 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1936 | le64_to_cpu(di->i_size); | |
1937 | } else { | |
1938 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1939 | free = (le16_to_cpu(el->l_count) - | |
1940 | le16_to_cpu(el->l_next_free_rec)) * | |
1941 | sizeof(struct ocfs2_extent_rec); | |
1942 | } | |
1943 | if (free >= xattrsize) | |
1944 | return 1; | |
1945 | ||
1946 | return 0; | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | * ocfs2_xattr_ibody_find() | |
1951 | * | |
1952 | * Find extended attribute in inode block and | |
1953 | * fill search info into struct ocfs2_xattr_search. | |
1954 | */ | |
1955 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1956 | int name_index, | |
1957 | const char *name, | |
1958 | struct ocfs2_xattr_search *xs) | |
1959 | { | |
1960 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1961 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1962 | int ret; | |
1963 | int has_space = 0; | |
1964 | ||
1965 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1966 | return 0; | |
1967 | ||
1968 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1969 | down_read(&oi->ip_alloc_sem); | |
1970 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1971 | up_read(&oi->ip_alloc_sem); | |
1972 | if (!has_space) | |
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | xs->xattr_bh = xs->inode_bh; | |
1977 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1978 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1979 | xs->header = (struct ocfs2_xattr_header *) | |
1980 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1981 | else | |
1982 | xs->header = (struct ocfs2_xattr_header *) | |
1983 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1984 | xs->base = (void *)xs->header; | |
1985 | xs->here = xs->header->xh_entries; | |
1986 | ||
1987 | /* Find the named attribute. */ | |
1988 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1989 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1990 | if (ret && ret != -ENODATA) | |
1991 | return ret; | |
1992 | xs->not_found = ret; | |
1993 | } | |
1994 | ||
1995 | return 0; | |
1996 | } | |
1997 | ||
1998 | /* | |
1999 | * ocfs2_xattr_ibody_set() | |
2000 | * | |
2001 | * Set, replace or remove an extended attribute into inode block. | |
2002 | * | |
2003 | */ | |
2004 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2005 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2006 | struct ocfs2_xattr_search *xs, |
2007 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2008 | { |
2009 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2010 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2011 | int ret; | |
2012 | ||
2013 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2014 | return -ENOSPC; | |
2015 | ||
2016 | down_write(&oi->ip_alloc_sem); | |
2017 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2018 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2019 | ret = -ENOSPC; | |
2020 | goto out; | |
2021 | } | |
2022 | } | |
2023 | ||
78f30c31 | 2024 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2025 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2026 | out: | |
2027 | up_write(&oi->ip_alloc_sem); | |
2028 | ||
2029 | return ret; | |
2030 | } | |
2031 | ||
2032 | /* | |
2033 | * ocfs2_xattr_block_find() | |
2034 | * | |
2035 | * Find extended attribute in external block and | |
2036 | * fill search info into struct ocfs2_xattr_search. | |
2037 | */ | |
2038 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2039 | int name_index, | |
2040 | const char *name, | |
2041 | struct ocfs2_xattr_search *xs) | |
2042 | { | |
2043 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2044 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2045 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2046 | int ret = 0; |
2047 | ||
2048 | if (!di->i_xattr_loc) | |
2049 | return ret; | |
2050 | ||
4ae1d69b JB |
2051 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2052 | &blk_bh); | |
cf1d6c76 TY |
2053 | if (ret < 0) { |
2054 | mlog_errno(ret); | |
2055 | return ret; | |
2056 | } | |
f6087fb7 | 2057 | |
cf1d6c76 | 2058 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2059 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2060 | |
2061 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2062 | xs->header = &xb->xb_attrs.xb_header; | |
2063 | xs->base = (void *)xs->header; | |
2064 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2065 | xs->here = xs->header->xh_entries; | |
2066 | ||
2067 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2068 | } else | |
2069 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2070 | name_index, | |
2071 | name, xs); | |
cf1d6c76 | 2072 | |
cf1d6c76 TY |
2073 | if (ret && ret != -ENODATA) { |
2074 | xs->xattr_bh = NULL; | |
2075 | goto cleanup; | |
2076 | } | |
2077 | xs->not_found = ret; | |
2078 | return 0; | |
cf1d6c76 TY |
2079 | cleanup: |
2080 | brelse(blk_bh); | |
2081 | ||
2082 | return ret; | |
2083 | } | |
2084 | ||
2085 | /* | |
2086 | * ocfs2_xattr_block_set() | |
2087 | * | |
2088 | * Set, replace or remove an extended attribute into external block. | |
2089 | * | |
2090 | */ | |
2091 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2092 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2093 | struct ocfs2_xattr_search *xs, |
2094 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2095 | { |
2096 | struct buffer_head *new_bh = NULL; | |
2097 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2098 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
85db90e7 | 2099 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
2100 | struct ocfs2_xattr_block *xblk = NULL; |
2101 | u16 suballoc_bit_start; | |
2102 | u32 num_got; | |
2103 | u64 first_blkno; | |
2104 | int ret; | |
2105 | ||
2106 | if (!xs->xattr_bh) { | |
84008972 JB |
2107 | ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh, |
2108 | OCFS2_JOURNAL_ACCESS_CREATE); | |
cf1d6c76 TY |
2109 | if (ret < 0) { |
2110 | mlog_errno(ret); | |
85db90e7 | 2111 | goto end; |
cf1d6c76 TY |
2112 | } |
2113 | ||
78f30c31 | 2114 | ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, |
cf1d6c76 TY |
2115 | &suballoc_bit_start, &num_got, |
2116 | &first_blkno); | |
2117 | if (ret < 0) { | |
2118 | mlog_errno(ret); | |
85db90e7 | 2119 | goto end; |
cf1d6c76 TY |
2120 | } |
2121 | ||
2122 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2123 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
2124 | ||
84008972 JB |
2125 | ret = ocfs2_journal_access_xb(handle, inode, new_bh, |
2126 | OCFS2_JOURNAL_ACCESS_CREATE); | |
cf1d6c76 TY |
2127 | if (ret < 0) { |
2128 | mlog_errno(ret); | |
85db90e7 | 2129 | goto end; |
cf1d6c76 TY |
2130 | } |
2131 | ||
2132 | /* Initialize ocfs2_xattr_block */ | |
2133 | xs->xattr_bh = new_bh; | |
2134 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2135 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2136 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2137 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2138 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2139 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2140 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2141 | ||
2142 | xs->header = &xblk->xb_attrs.xb_header; | |
2143 | xs->base = (void *)xs->header; | |
2144 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2145 | xs->here = xs->header->xh_entries; | |
2146 | ||
cf1d6c76 TY |
2147 | ret = ocfs2_journal_dirty(handle, new_bh); |
2148 | if (ret < 0) { | |
2149 | mlog_errno(ret); | |
85db90e7 | 2150 | goto end; |
cf1d6c76 TY |
2151 | } |
2152 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
85db90e7 | 2153 | ocfs2_journal_dirty(handle, xs->inode_bh); |
01225596 TM |
2154 | } else |
2155 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2156 | ||
2157 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2158 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2159 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2160 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2161 | if (!ret || ret != -ENOSPC) |
2162 | goto end; | |
2163 | ||
78f30c31 | 2164 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2165 | if (ret) |
2166 | goto end; | |
cf1d6c76 TY |
2167 | } |
2168 | ||
78f30c31 | 2169 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2170 | |
2171 | end: | |
cf1d6c76 TY |
2172 | |
2173 | return ret; | |
2174 | } | |
2175 | ||
78f30c31 TM |
2176 | /* Check whether the new xattr can be inserted into the inode. */ |
2177 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2178 | struct ocfs2_xattr_info *xi, | |
2179 | struct ocfs2_xattr_search *xs) | |
2180 | { | |
2181 | u64 value_size; | |
2182 | struct ocfs2_xattr_entry *last; | |
2183 | int free, i; | |
2184 | size_t min_offs = xs->end - xs->base; | |
2185 | ||
2186 | if (!xs->header) | |
2187 | return 0; | |
2188 | ||
2189 | last = xs->header->xh_entries; | |
2190 | ||
2191 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2192 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2193 | if (offs < min_offs) | |
2194 | min_offs = offs; | |
2195 | last += 1; | |
2196 | } | |
2197 | ||
4442f518 | 2198 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2199 | if (free < 0) |
2200 | return 0; | |
2201 | ||
2202 | BUG_ON(!xs->not_found); | |
2203 | ||
2204 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2205 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2206 | else | |
2207 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2208 | ||
2209 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2210 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2211 | return 1; | |
2212 | ||
2213 | return 0; | |
2214 | } | |
2215 | ||
2216 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2217 | struct ocfs2_dinode *di, | |
2218 | struct ocfs2_xattr_info *xi, | |
2219 | struct ocfs2_xattr_search *xis, | |
2220 | struct ocfs2_xattr_search *xbs, | |
2221 | int *clusters_need, | |
85db90e7 TM |
2222 | int *meta_need, |
2223 | int *credits_need) | |
78f30c31 TM |
2224 | { |
2225 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2226 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2227 | struct buffer_head *bh = NULL; |
2228 | struct ocfs2_xattr_block *xb = NULL; | |
2229 | struct ocfs2_xattr_entry *xe = NULL; | |
2230 | struct ocfs2_xattr_value_root *xv = NULL; | |
2231 | char *base = NULL; | |
2232 | int name_offset, name_len = 0; | |
2233 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2234 | xi->value_len); | |
2235 | u64 value_size; | |
2236 | ||
71d548a6 TM |
2237 | /* |
2238 | * Calculate the clusters we need to write. | |
2239 | * No matter whether we replace an old one or add a new one, | |
2240 | * we need this for writing. | |
2241 | */ | |
2242 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2243 | credits += new_clusters * | |
2244 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2245 | ||
78f30c31 | 2246 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2247 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2248 | ||
2249 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2250 | clusters_add += new_clusters; |
85db90e7 TM |
2251 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2252 | &def_xv.xv.xr_list, | |
2253 | new_clusters); | |
2254 | } | |
78f30c31 TM |
2255 | |
2256 | goto meta_guess; | |
2257 | } | |
2258 | ||
2259 | if (!xis->not_found) { | |
2260 | xe = xis->here; | |
2261 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2262 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2263 | base = xis->base; | |
85db90e7 | 2264 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2265 | } else { |
970e4936 | 2266 | int i, block_off = 0; |
78f30c31 TM |
2267 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2268 | xe = xbs->here; | |
2269 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2270 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2271 | i = xbs->here - xbs->header->xh_entries; | |
2272 | old_in_xb = 1; | |
2273 | ||
2274 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2275 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2276 | bucket_xh(xbs->bucket), | |
2277 | i, &block_off, | |
2278 | &name_offset); | |
2279 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2280 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2281 | } else { | |
78f30c31 | 2282 | base = xbs->base; |
85db90e7 TM |
2283 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2284 | } | |
2285 | } | |
2286 | ||
2287 | /* | |
2288 | * delete a xattr doesn't need metadata and cluster allocation. | |
2289 | * so just calculate the credits and return. | |
2290 | * | |
2291 | * The credits for removing the value tree will be extended | |
2292 | * by ocfs2_remove_extent itself. | |
2293 | */ | |
2294 | if (!xi->value) { | |
2295 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2296 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2297 | |
2298 | goto out; | |
78f30c31 TM |
2299 | } |
2300 | ||
2301 | /* do cluster allocation guess first. */ | |
2302 | value_size = le64_to_cpu(xe->xe_value_size); | |
2303 | ||
2304 | if (old_in_xb) { | |
2305 | /* | |
2306 | * In xattr set, we always try to set the xe in inode first, | |
2307 | * so if it can be inserted into inode successfully, the old | |
2308 | * one will be removed from the xattr block, and this xattr | |
2309 | * will be inserted into inode as a new xattr in inode. | |
2310 | */ | |
2311 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2312 | clusters_add += new_clusters; | |
a90714c1 | 2313 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2314 | OCFS2_INODE_UPDATE_CREDITS; |
2315 | if (!ocfs2_xattr_is_local(xe)) | |
2316 | credits += ocfs2_calc_extend_credits( | |
2317 | inode->i_sb, | |
2318 | &def_xv.xv.xr_list, | |
2319 | new_clusters); | |
78f30c31 TM |
2320 | goto out; |
2321 | } | |
2322 | } | |
2323 | ||
2324 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2325 | /* the new values will be stored outside. */ | |
2326 | u32 old_clusters = 0; | |
2327 | ||
2328 | if (!ocfs2_xattr_is_local(xe)) { | |
2329 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2330 | value_size); | |
2331 | xv = (struct ocfs2_xattr_value_root *) | |
2332 | (base + name_offset + name_len); | |
97aff52a | 2333 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2334 | } else |
2335 | xv = &def_xv.xv; | |
2336 | ||
85db90e7 | 2337 | if (old_clusters >= new_clusters) { |
a90714c1 | 2338 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2339 | goto out; |
85db90e7 | 2340 | } else { |
78f30c31 TM |
2341 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2342 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2343 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2344 | &xv->xr_list, | |
2345 | new_clusters - | |
2346 | old_clusters); | |
97aff52a TM |
2347 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2348 | goto out; | |
78f30c31 TM |
2349 | } |
2350 | } else { | |
2351 | /* | |
2352 | * Now the new value will be stored inside. So if the new | |
2353 | * value is smaller than the size of value root or the old | |
2354 | * value, we don't need any allocation, otherwise we have | |
2355 | * to guess metadata allocation. | |
2356 | */ | |
2357 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2358 | (!ocfs2_xattr_is_local(xe) && | |
2359 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2360 | goto out; | |
2361 | } | |
2362 | ||
2363 | meta_guess: | |
2364 | /* calculate metadata allocation. */ | |
2365 | if (di->i_xattr_loc) { | |
2366 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2367 | ret = ocfs2_read_xattr_block(inode, |
2368 | le64_to_cpu(di->i_xattr_loc), | |
2369 | &bh); | |
78f30c31 TM |
2370 | if (ret) { |
2371 | mlog_errno(ret); | |
2372 | goto out; | |
2373 | } | |
2374 | ||
2375 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2376 | } else | |
2377 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2378 | ||
90cb546c TM |
2379 | /* |
2380 | * If there is already an xattr tree, good, we can calculate | |
2381 | * like other b-trees. Otherwise we may have the chance of | |
2382 | * create a tree, the credit calculation is borrowed from | |
2383 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2384 | * new tree will be cluster based, so no meta is needed. | |
2385 | */ | |
78f30c31 TM |
2386 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2387 | struct ocfs2_extent_list *el = | |
2388 | &xb->xb_attrs.xb_root.xt_list; | |
2389 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2390 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2391 | el, 1); | |
90cb546c TM |
2392 | } else |
2393 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2394 | |
2395 | /* | |
2396 | * This cluster will be used either for new bucket or for | |
2397 | * new xattr block. | |
2398 | * If the cluster size is the same as the bucket size, one | |
2399 | * more is needed since we may need to extend the bucket | |
2400 | * also. | |
2401 | */ | |
2402 | clusters_add += 1; | |
85db90e7 | 2403 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2404 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2405 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2406 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2407 | clusters_add += 1; |
85db90e7 TM |
2408 | } |
2409 | } else { | |
78f30c31 | 2410 | meta_add += 1; |
85db90e7 TM |
2411 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2412 | } | |
78f30c31 TM |
2413 | out: |
2414 | if (clusters_need) | |
2415 | *clusters_need = clusters_add; | |
2416 | if (meta_need) | |
2417 | *meta_need = meta_add; | |
85db90e7 TM |
2418 | if (credits_need) |
2419 | *credits_need = credits; | |
78f30c31 TM |
2420 | brelse(bh); |
2421 | return ret; | |
2422 | } | |
2423 | ||
2424 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2425 | struct ocfs2_dinode *di, | |
2426 | struct ocfs2_xattr_info *xi, | |
2427 | struct ocfs2_xattr_search *xis, | |
2428 | struct ocfs2_xattr_search *xbs, | |
85db90e7 TM |
2429 | struct ocfs2_xattr_set_ctxt *ctxt, |
2430 | int *credits) | |
78f30c31 TM |
2431 | { |
2432 | int clusters_add, meta_add, ret; | |
2433 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2434 | ||
2435 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2436 | ||
2437 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2438 | ||
2439 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2440 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2441 | if (ret) { |
2442 | mlog_errno(ret); | |
2443 | return ret; | |
2444 | } | |
2445 | ||
85db90e7 TM |
2446 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2447 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2448 | |
2449 | if (meta_add) { | |
2450 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2451 | &ctxt->meta_ac); | |
2452 | if (ret) { | |
2453 | mlog_errno(ret); | |
2454 | goto out; | |
2455 | } | |
2456 | } | |
2457 | ||
2458 | if (clusters_add) { | |
2459 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2460 | if (ret) | |
2461 | mlog_errno(ret); | |
2462 | } | |
2463 | out: | |
2464 | if (ret) { | |
2465 | if (ctxt->meta_ac) { | |
2466 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2467 | ctxt->meta_ac = NULL; | |
2468 | } | |
2469 | ||
2470 | /* | |
2471 | * We cannot have an error and a non null ctxt->data_ac. | |
2472 | */ | |
2473 | } | |
2474 | ||
2475 | return ret; | |
2476 | } | |
2477 | ||
85db90e7 TM |
2478 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2479 | struct ocfs2_dinode *di, | |
2480 | struct ocfs2_xattr_info *xi, | |
2481 | struct ocfs2_xattr_search *xis, | |
2482 | struct ocfs2_xattr_search *xbs, | |
2483 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2484 | { | |
9f868f16 | 2485 | int ret = 0, credits, old_found; |
85db90e7 TM |
2486 | |
2487 | if (!xi->value) { | |
2488 | /* Remove existing extended attribute */ | |
2489 | if (!xis->not_found) | |
2490 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2491 | else if (!xbs->not_found) | |
2492 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2493 | } else { | |
2494 | /* We always try to set extended attribute into inode first*/ | |
2495 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2496 | if (!ret && !xbs->not_found) { | |
2497 | /* | |
2498 | * If succeed and that extended attribute existing in | |
2499 | * external block, then we will remove it. | |
2500 | */ | |
2501 | xi->value = NULL; | |
2502 | xi->value_len = 0; | |
2503 | ||
9f868f16 | 2504 | old_found = xis->not_found; |
85db90e7 TM |
2505 | xis->not_found = -ENODATA; |
2506 | ret = ocfs2_calc_xattr_set_need(inode, | |
2507 | di, | |
2508 | xi, | |
2509 | xis, | |
2510 | xbs, | |
2511 | NULL, | |
2512 | NULL, | |
2513 | &credits); | |
9f868f16 | 2514 | xis->not_found = old_found; |
85db90e7 TM |
2515 | if (ret) { |
2516 | mlog_errno(ret); | |
2517 | goto out; | |
2518 | } | |
2519 | ||
2520 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2521 | ctxt->handle->h_buffer_credits); | |
2522 | if (ret) { | |
2523 | mlog_errno(ret); | |
2524 | goto out; | |
2525 | } | |
2526 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2527 | } else if (ret == -ENOSPC) { | |
2528 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2529 | ret = ocfs2_xattr_block_find(inode, | |
2530 | xi->name_index, | |
2531 | xi->name, xbs); | |
2532 | if (ret) | |
2533 | goto out; | |
2534 | ||
9f868f16 | 2535 | old_found = xis->not_found; |
85db90e7 TM |
2536 | xis->not_found = -ENODATA; |
2537 | ret = ocfs2_calc_xattr_set_need(inode, | |
2538 | di, | |
2539 | xi, | |
2540 | xis, | |
2541 | xbs, | |
2542 | NULL, | |
2543 | NULL, | |
2544 | &credits); | |
9f868f16 | 2545 | xis->not_found = old_found; |
85db90e7 TM |
2546 | if (ret) { |
2547 | mlog_errno(ret); | |
2548 | goto out; | |
2549 | } | |
2550 | ||
2551 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2552 | ctxt->handle->h_buffer_credits); | |
2553 | if (ret) { | |
2554 | mlog_errno(ret); | |
2555 | goto out; | |
2556 | } | |
2557 | } | |
2558 | /* | |
2559 | * If no space in inode, we will set extended attribute | |
2560 | * into external block. | |
2561 | */ | |
2562 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2563 | if (ret) | |
2564 | goto out; | |
2565 | if (!xis->not_found) { | |
2566 | /* | |
2567 | * If succeed and that extended attribute | |
2568 | * existing in inode, we will remove it. | |
2569 | */ | |
2570 | xi->value = NULL; | |
2571 | xi->value_len = 0; | |
2572 | xbs->not_found = -ENODATA; | |
2573 | ret = ocfs2_calc_xattr_set_need(inode, | |
2574 | di, | |
2575 | xi, | |
2576 | xis, | |
2577 | xbs, | |
2578 | NULL, | |
2579 | NULL, | |
2580 | &credits); | |
2581 | if (ret) { | |
2582 | mlog_errno(ret); | |
2583 | goto out; | |
2584 | } | |
2585 | ||
2586 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2587 | ctxt->handle->h_buffer_credits); | |
2588 | if (ret) { | |
2589 | mlog_errno(ret); | |
2590 | goto out; | |
2591 | } | |
2592 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2593 | xis, ctxt); | |
2594 | } | |
2595 | } | |
2596 | } | |
2597 | ||
4b3f6209 TM |
2598 | if (!ret) { |
2599 | /* Update inode ctime. */ | |
89a907af TM |
2600 | ret = ocfs2_journal_access_di(ctxt->handle, inode, |
2601 | xis->inode_bh, | |
2602 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2603 | if (ret) { |
2604 | mlog_errno(ret); | |
2605 | goto out; | |
2606 | } | |
2607 | ||
2608 | inode->i_ctime = CURRENT_TIME; | |
2609 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2610 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2611 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2612 | } | |
85db90e7 TM |
2613 | out: |
2614 | return ret; | |
2615 | } | |
2616 | ||
6c3faba4 TY |
2617 | /* |
2618 | * This function only called duing creating inode | |
2619 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2620 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2621 | */ |
2622 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2623 | struct inode *inode, | |
2624 | struct buffer_head *di_bh, | |
2625 | int name_index, | |
2626 | const char *name, | |
2627 | const void *value, | |
2628 | size_t value_len, | |
2629 | int flags, | |
2630 | struct ocfs2_alloc_context *meta_ac, | |
2631 | struct ocfs2_alloc_context *data_ac) | |
2632 | { | |
2633 | struct ocfs2_dinode *di; | |
2634 | int ret; | |
2635 | ||
2636 | struct ocfs2_xattr_info xi = { | |
2637 | .name_index = name_index, | |
2638 | .name = name, | |
2639 | .value = value, | |
2640 | .value_len = value_len, | |
2641 | }; | |
2642 | ||
2643 | struct ocfs2_xattr_search xis = { | |
2644 | .not_found = -ENODATA, | |
2645 | }; | |
2646 | ||
2647 | struct ocfs2_xattr_search xbs = { | |
2648 | .not_found = -ENODATA, | |
2649 | }; | |
2650 | ||
2651 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2652 | .handle = handle, | |
2653 | .meta_ac = meta_ac, | |
2654 | .data_ac = data_ac, | |
2655 | }; | |
2656 | ||
2657 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2658 | return -EOPNOTSUPP; | |
2659 | ||
008aafaf TY |
2660 | /* |
2661 | * In extreme situation, may need xattr bucket when | |
2662 | * block size is too small. And we have already reserved | |
2663 | * the credits for bucket in mknod. | |
2664 | */ | |
2665 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2666 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2667 | if (!xbs.bucket) { | |
2668 | mlog_errno(-ENOMEM); | |
2669 | return -ENOMEM; | |
2670 | } | |
2671 | } | |
2672 | ||
6c3faba4 TY |
2673 | xis.inode_bh = xbs.inode_bh = di_bh; |
2674 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2675 | ||
2676 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2677 | ||
2678 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2679 | if (ret) | |
2680 | goto cleanup; | |
2681 | if (xis.not_found) { | |
2682 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2683 | if (ret) | |
2684 | goto cleanup; | |
2685 | } | |
2686 | ||
2687 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2688 | ||
2689 | cleanup: | |
2690 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2691 | brelse(xbs.xattr_bh); | |
008aafaf | 2692 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2693 | |
2694 | return ret; | |
2695 | } | |
2696 | ||
cf1d6c76 TY |
2697 | /* |
2698 | * ocfs2_xattr_set() | |
2699 | * | |
2700 | * Set, replace or remove an extended attribute for this inode. | |
2701 | * value is NULL to remove an existing extended attribute, else either | |
2702 | * create or replace an extended attribute. | |
2703 | */ | |
2704 | int ocfs2_xattr_set(struct inode *inode, | |
2705 | int name_index, | |
2706 | const char *name, | |
2707 | const void *value, | |
2708 | size_t value_len, | |
2709 | int flags) | |
2710 | { | |
2711 | struct buffer_head *di_bh = NULL; | |
2712 | struct ocfs2_dinode *di; | |
85db90e7 | 2713 | int ret, credits; |
78f30c31 | 2714 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2715 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2716 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
cf1d6c76 TY |
2717 | |
2718 | struct ocfs2_xattr_info xi = { | |
2719 | .name_index = name_index, | |
2720 | .name = name, | |
2721 | .value = value, | |
2722 | .value_len = value_len, | |
2723 | }; | |
2724 | ||
2725 | struct ocfs2_xattr_search xis = { | |
2726 | .not_found = -ENODATA, | |
2727 | }; | |
2728 | ||
2729 | struct ocfs2_xattr_search xbs = { | |
2730 | .not_found = -ENODATA, | |
2731 | }; | |
2732 | ||
8154da3d TY |
2733 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2734 | return -EOPNOTSUPP; | |
2735 | ||
ba937127 JB |
2736 | /* |
2737 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2738 | * bucket. | |
2739 | */ | |
2740 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2741 | if (!xbs.bucket) { | |
2742 | mlog_errno(-ENOMEM); | |
2743 | return -ENOMEM; | |
2744 | } | |
2745 | ||
cf1d6c76 TY |
2746 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2747 | if (ret < 0) { | |
2748 | mlog_errno(ret); | |
ba937127 | 2749 | goto cleanup_nolock; |
cf1d6c76 TY |
2750 | } |
2751 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2752 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2753 | ||
2754 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2755 | /* | |
2756 | * Scan inode and external block to find the same name | |
2757 | * extended attribute and collect search infomation. | |
2758 | */ | |
2759 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2760 | if (ret) | |
2761 | goto cleanup; | |
2762 | if (xis.not_found) { | |
2763 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2764 | if (ret) | |
2765 | goto cleanup; | |
2766 | } | |
2767 | ||
2768 | if (xis.not_found && xbs.not_found) { | |
2769 | ret = -ENODATA; | |
2770 | if (flags & XATTR_REPLACE) | |
2771 | goto cleanup; | |
2772 | ret = 0; | |
2773 | if (!value) | |
2774 | goto cleanup; | |
2775 | } else { | |
2776 | ret = -EEXIST; | |
2777 | if (flags & XATTR_CREATE) | |
2778 | goto cleanup; | |
2779 | } | |
2780 | ||
85db90e7 TM |
2781 | |
2782 | mutex_lock(&tl_inode->i_mutex); | |
2783 | ||
2784 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2785 | ret = __ocfs2_flush_truncate_log(osb); | |
2786 | if (ret < 0) { | |
2787 | mutex_unlock(&tl_inode->i_mutex); | |
2788 | mlog_errno(ret); | |
2789 | goto cleanup; | |
2790 | } | |
2791 | } | |
2792 | mutex_unlock(&tl_inode->i_mutex); | |
2793 | ||
2794 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
2795 | &xbs, &ctxt, &credits); | |
78f30c31 TM |
2796 | if (ret) { |
2797 | mlog_errno(ret); | |
2798 | goto cleanup; | |
2799 | } | |
2800 | ||
4b3f6209 TM |
2801 | /* we need to update inode's ctime field, so add credit for it. */ |
2802 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
85db90e7 TM |
2803 | ctxt.handle = ocfs2_start_trans(osb, credits); |
2804 | if (IS_ERR(ctxt.handle)) { | |
2805 | ret = PTR_ERR(ctxt.handle); | |
2806 | mlog_errno(ret); | |
2807 | goto cleanup; | |
cf1d6c76 | 2808 | } |
85db90e7 TM |
2809 | |
2810 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2811 | ||
2812 | ocfs2_commit_trans(osb, ctxt.handle); | |
2813 | ||
78f30c31 TM |
2814 | if (ctxt.data_ac) |
2815 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2816 | if (ctxt.meta_ac) | |
2817 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2818 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2819 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2820 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2821 | cleanup: |
2822 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2823 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2824 | cleanup_nolock: |
cf1d6c76 TY |
2825 | brelse(di_bh); |
2826 | brelse(xbs.xattr_bh); | |
ba937127 | 2827 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2828 | |
2829 | return ret; | |
2830 | } | |
2831 | ||
0c044f0b TM |
2832 | /* |
2833 | * Find the xattr extent rec which may contains name_hash. | |
2834 | * e_cpos will be the first name hash of the xattr rec. | |
2835 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2836 | */ | |
2837 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2838 | u32 name_hash, | |
2839 | u64 *p_blkno, | |
2840 | u32 *e_cpos, | |
2841 | u32 *num_clusters, | |
2842 | struct ocfs2_extent_list *el) | |
2843 | { | |
2844 | int ret = 0, i; | |
2845 | struct buffer_head *eb_bh = NULL; | |
2846 | struct ocfs2_extent_block *eb; | |
2847 | struct ocfs2_extent_rec *rec = NULL; | |
2848 | u64 e_blkno = 0; | |
2849 | ||
2850 | if (el->l_tree_depth) { | |
2851 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2852 | if (ret) { | |
2853 | mlog_errno(ret); | |
2854 | goto out; | |
2855 | } | |
2856 | ||
2857 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2858 | el = &eb->h_list; | |
2859 | ||
2860 | if (el->l_tree_depth) { | |
2861 | ocfs2_error(inode->i_sb, | |
2862 | "Inode %lu has non zero tree depth in " | |
2863 | "xattr tree block %llu\n", inode->i_ino, | |
2864 | (unsigned long long)eb_bh->b_blocknr); | |
2865 | ret = -EROFS; | |
2866 | goto out; | |
2867 | } | |
2868 | } | |
2869 | ||
2870 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2871 | rec = &el->l_recs[i]; | |
2872 | ||
2873 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2874 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2875 | break; | |
2876 | } | |
2877 | } | |
2878 | ||
2879 | if (!e_blkno) { | |
2880 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2881 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2882 | le32_to_cpu(rec->e_cpos), | |
2883 | ocfs2_rec_clusters(el, rec)); | |
2884 | ret = -EROFS; | |
2885 | goto out; | |
2886 | } | |
2887 | ||
2888 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2889 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2890 | if (e_cpos) | |
2891 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2892 | out: | |
2893 | brelse(eb_bh); | |
2894 | return ret; | |
2895 | } | |
2896 | ||
2897 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2898 | struct ocfs2_xattr_bucket *bucket, | |
2899 | void *para); | |
2900 | ||
589dc260 | 2901 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2902 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2903 | int name_index, |
2904 | const char *name, | |
2905 | u32 name_hash, | |
2906 | u16 *xe_index, | |
2907 | int *found) | |
2908 | { | |
2909 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2910 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2911 | size_t name_len = strlen(name); |
2912 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2913 | char *xe_name; |
2914 | ||
2915 | /* | |
2916 | * We don't use binary search in the bucket because there | |
2917 | * may be multiple entries with the same name hash. | |
2918 | */ | |
2919 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2920 | xe = &xh->xh_entries[i]; | |
2921 | ||
2922 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2923 | continue; | |
2924 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2925 | break; | |
2926 | ||
2927 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2928 | if (!cmp) | |
2929 | cmp = name_len - xe->xe_name_len; | |
2930 | if (cmp) | |
2931 | continue; | |
2932 | ||
2933 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2934 | xh, | |
2935 | i, | |
2936 | &block_off, | |
2937 | &new_offset); | |
2938 | if (ret) { | |
2939 | mlog_errno(ret); | |
2940 | break; | |
2941 | } | |
2942 | ||
970e4936 | 2943 | |
e2356a3f JB |
2944 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2945 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2946 | *xe_index = i; |
2947 | *found = 1; | |
2948 | ret = 0; | |
2949 | break; | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | return ret; | |
2954 | } | |
2955 | ||
2956 | /* | |
2957 | * Find the specified xattr entry in a series of buckets. | |
2958 | * This series start from p_blkno and last for num_clusters. | |
2959 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2960 | * the num of the valid buckets. | |
2961 | * | |
2962 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2963 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2964 | */ | |
2965 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2966 | int name_index, | |
2967 | const char *name, | |
2968 | u32 name_hash, | |
2969 | u64 p_blkno, | |
2970 | u32 first_hash, | |
2971 | u32 num_clusters, | |
2972 | struct ocfs2_xattr_search *xs) | |
2973 | { | |
2974 | int ret, found = 0; | |
589dc260 TM |
2975 | struct ocfs2_xattr_header *xh = NULL; |
2976 | struct ocfs2_xattr_entry *xe = NULL; | |
2977 | u16 index = 0; | |
2978 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2979 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2980 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2981 | u32 last_hash; |
e2356a3f | 2982 | u64 blkno, lower_blkno = 0; |
589dc260 | 2983 | |
e2356a3f JB |
2984 | search = ocfs2_xattr_bucket_new(inode); |
2985 | if (!search) { | |
2986 | ret = -ENOMEM; | |
2987 | mlog_errno(ret); | |
2988 | goto out; | |
2989 | } | |
2990 | ||
2991 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2992 | if (ret) { |
2993 | mlog_errno(ret); | |
2994 | goto out; | |
2995 | } | |
2996 | ||
e2356a3f | 2997 | xh = bucket_xh(search); |
589dc260 | 2998 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 2999 | while (low_bucket <= high_bucket) { |
e2356a3f | 3000 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3001 | |
e2356a3f | 3002 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3003 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3004 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3005 | if (ret) { |
3006 | mlog_errno(ret); | |
3007 | goto out; | |
3008 | } | |
3009 | ||
e2356a3f | 3010 | xh = bucket_xh(search); |
589dc260 TM |
3011 | xe = &xh->xh_entries[0]; |
3012 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3013 | high_bucket = bucket - 1; | |
3014 | continue; | |
3015 | } | |
3016 | ||
3017 | /* | |
3018 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3019 | * bucket is larger than the search one. for an empty |
3020 | * bucket, the last one is also the first one. | |
589dc260 | 3021 | */ |
5a095611 TM |
3022 | if (xh->xh_count) |
3023 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3024 | ||
589dc260 TM |
3025 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3026 | ||
e2356a3f JB |
3027 | /* record lower_blkno which may be the insert place. */ |
3028 | lower_blkno = blkno; | |
589dc260 TM |
3029 | |
3030 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3031 | low_bucket = bucket + 1; | |
3032 | continue; | |
3033 | } | |
3034 | ||
3035 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3036 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3037 | name_index, name, name_hash, |
3038 | &index, &found); | |
3039 | if (ret) { | |
3040 | mlog_errno(ret); | |
3041 | goto out; | |
3042 | } | |
3043 | break; | |
3044 | } | |
3045 | ||
3046 | /* | |
3047 | * Record the bucket we have found. | |
3048 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3049 | * always set it to the previous bucket. | |
3050 | */ | |
e2356a3f JB |
3051 | if (!lower_blkno) |
3052 | lower_blkno = p_blkno; | |
3053 | ||
3054 | /* This should be in cache - we just read it during the search */ | |
3055 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3056 | if (ret) { | |
3057 | mlog_errno(ret); | |
3058 | goto out; | |
589dc260 | 3059 | } |
589dc260 | 3060 | |
ba937127 JB |
3061 | xs->header = bucket_xh(xs->bucket); |
3062 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3063 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3064 | ||
3065 | if (found) { | |
589dc260 TM |
3066 | xs->here = &xs->header->xh_entries[index]; |
3067 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3068 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3069 | } else |
3070 | ret = -ENODATA; | |
3071 | ||
3072 | out: | |
e2356a3f | 3073 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3074 | return ret; |
3075 | } | |
3076 | ||
3077 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3078 | struct buffer_head *root_bh, | |
3079 | int name_index, | |
3080 | const char *name, | |
3081 | struct ocfs2_xattr_search *xs) | |
3082 | { | |
3083 | int ret; | |
3084 | struct ocfs2_xattr_block *xb = | |
3085 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3086 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3087 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3088 | u64 p_blkno = 0; | |
3089 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3090 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3091 | |
3092 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3093 | return -ENODATA; | |
3094 | ||
3095 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3096 | name, name_hash, name_index); | |
3097 | ||
3098 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3099 | &num_clusters, el); | |
3100 | if (ret) { | |
3101 | mlog_errno(ret); | |
3102 | goto out; | |
3103 | } | |
3104 | ||
3105 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3106 | ||
3107 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3108 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3109 | first_hash); | |
589dc260 TM |
3110 | |
3111 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3112 | p_blkno, first_hash, num_clusters, xs); | |
3113 | ||
3114 | out: | |
3115 | return ret; | |
3116 | } | |
3117 | ||
0c044f0b TM |
3118 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3119 | u64 blkno, | |
3120 | u32 clusters, | |
3121 | xattr_bucket_func *func, | |
3122 | void *para) | |
3123 | { | |
6dde41d9 | 3124 | int i, ret = 0; |
0c044f0b TM |
3125 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3126 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3127 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3128 | |
ba937127 JB |
3129 | bucket = ocfs2_xattr_bucket_new(inode); |
3130 | if (!bucket) { | |
3131 | mlog_errno(-ENOMEM); | |
3132 | return -ENOMEM; | |
3133 | } | |
0c044f0b TM |
3134 | |
3135 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3136 | clusters, (unsigned long long)blkno); |
0c044f0b | 3137 | |
ba937127 JB |
3138 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3139 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3140 | if (ret) { |
3141 | mlog_errno(ret); | |
ba937127 | 3142 | break; |
0c044f0b TM |
3143 | } |
3144 | ||
0c044f0b TM |
3145 | /* |
3146 | * The real bucket num in this series of blocks is stored | |
3147 | * in the 1st bucket. | |
3148 | */ | |
3149 | if (i == 0) | |
ba937127 | 3150 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3151 | |
de29c085 MF |
3152 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3153 | (unsigned long long)blkno, | |
ba937127 | 3154 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3155 | if (func) { |
ba937127 JB |
3156 | ret = func(inode, bucket, para); |
3157 | if (ret) | |
0c044f0b | 3158 | mlog_errno(ret); |
ba937127 | 3159 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3160 | } |
3161 | ||
ba937127 JB |
3162 | ocfs2_xattr_bucket_relse(bucket); |
3163 | if (ret) | |
3164 | break; | |
0c044f0b TM |
3165 | } |
3166 | ||
ba937127 | 3167 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3168 | return ret; |
3169 | } | |
3170 | ||
3171 | struct ocfs2_xattr_tree_list { | |
3172 | char *buffer; | |
3173 | size_t buffer_size; | |
936b8834 | 3174 | size_t result; |
0c044f0b TM |
3175 | }; |
3176 | ||
3177 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
3178 | struct ocfs2_xattr_header *xh, | |
3179 | int index, | |
3180 | int *block_off, | |
3181 | int *new_offset) | |
3182 | { | |
3183 | u16 name_offset; | |
3184 | ||
3185 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3186 | return -EINVAL; | |
3187 | ||
3188 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3189 | ||
3190 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
3191 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
3192 | ||
3193 | return 0; | |
3194 | } | |
3195 | ||
3196 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3197 | struct ocfs2_xattr_bucket *bucket, | |
3198 | void *para) | |
3199 | { | |
936b8834 | 3200 | int ret = 0, type; |
0c044f0b | 3201 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3202 | int i, block_off, new_offset; |
936b8834 | 3203 | const char *prefix, *name; |
0c044f0b | 3204 | |
3e632946 JB |
3205 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3206 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3207 | type = ocfs2_xattr_get_type(entry); |
3208 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3209 | |
936b8834 | 3210 | if (prefix) { |
0c044f0b | 3211 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 3212 | bucket_xh(bucket), |
0c044f0b TM |
3213 | i, |
3214 | &block_off, | |
3215 | &new_offset); | |
3216 | if (ret) | |
3217 | break; | |
936b8834 | 3218 | |
51def39f | 3219 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3220 | new_offset; |
3221 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3222 | xl->buffer_size, | |
3223 | &xl->result, | |
3224 | prefix, name, | |
3225 | entry->xe_name_len); | |
3226 | if (ret) | |
3227 | break; | |
0c044f0b TM |
3228 | } |
3229 | } | |
3230 | ||
3231 | return ret; | |
3232 | } | |
3233 | ||
3234 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3235 | struct ocfs2_xattr_tree_root *xt, | |
3236 | char *buffer, | |
3237 | size_t buffer_size) | |
3238 | { | |
3239 | struct ocfs2_extent_list *el = &xt->xt_list; | |
3240 | int ret = 0; | |
3241 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3242 | u64 p_blkno = 0; | |
3243 | struct ocfs2_xattr_tree_list xl = { | |
3244 | .buffer = buffer, | |
3245 | .buffer_size = buffer_size, | |
936b8834 | 3246 | .result = 0, |
0c044f0b TM |
3247 | }; |
3248 | ||
3249 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3250 | return 0; | |
3251 | ||
3252 | while (name_hash > 0) { | |
3253 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3254 | &e_cpos, &num_clusters, el); | |
3255 | if (ret) { | |
3256 | mlog_errno(ret); | |
3257 | goto out; | |
3258 | } | |
3259 | ||
3260 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
3261 | ocfs2_list_xattr_bucket, | |
3262 | &xl); | |
3263 | if (ret) { | |
3264 | mlog_errno(ret); | |
3265 | goto out; | |
3266 | } | |
3267 | ||
3268 | if (e_cpos == 0) | |
3269 | break; | |
3270 | ||
3271 | name_hash = e_cpos - 1; | |
3272 | } | |
3273 | ||
936b8834 | 3274 | ret = xl.result; |
0c044f0b TM |
3275 | out: |
3276 | return ret; | |
3277 | } | |
01225596 TM |
3278 | |
3279 | static int cmp_xe(const void *a, const void *b) | |
3280 | { | |
3281 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3282 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3283 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3284 | ||
3285 | if (l_hash > r_hash) | |
3286 | return 1; | |
3287 | if (l_hash < r_hash) | |
3288 | return -1; | |
3289 | return 0; | |
3290 | } | |
3291 | ||
3292 | static void swap_xe(void *a, void *b, int size) | |
3293 | { | |
3294 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3295 | ||
3296 | tmp = *l; | |
3297 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3298 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3299 | } | |
3300 | ||
3301 | /* | |
3302 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3303 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3304 | * The header goes at the start of the bucket, and the names+values are |
3305 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3306 | * Note: we need to sort the entries since they are not saved in order |
3307 | * in the ocfs2_xattr_block. | |
3308 | */ | |
3309 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3310 | struct buffer_head *xb_bh, | |
178eeac3 | 3311 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3312 | { |
3313 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3314 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3315 | u16 offset, size, off_change; |
3316 | struct ocfs2_xattr_entry *xe; | |
3317 | struct ocfs2_xattr_block *xb = | |
3318 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3319 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3320 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3321 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3322 | char *src = xb_bh->b_data; |
3323 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3324 | |
3325 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3326 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3327 | (unsigned long long)bucket_blkno(bucket)); |
3328 | ||
3329 | for (i = 0; i < blks; i++) | |
3330 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3331 | |
01225596 TM |
3332 | /* |
3333 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3334 | * there is a offset change corresponding to the change of | |
3335 | * ocfs2_xattr_header's position. | |
3336 | */ | |
3337 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3338 | xe = &xb_xh->xh_entries[count - 1]; | |
3339 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3340 | size = blocksize - offset; | |
3341 | ||
3342 | /* copy all the names and values. */ | |
01225596 TM |
3343 | memcpy(target + offset, src + offset, size); |
3344 | ||
3345 | /* Init new header now. */ | |
3346 | xh->xh_count = xb_xh->xh_count; | |
3347 | xh->xh_num_buckets = cpu_to_le16(1); | |
3348 | xh->xh_name_value_len = cpu_to_le16(size); | |
3349 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3350 | ||
3351 | /* copy all the entries. */ | |
178eeac3 | 3352 | target = bucket_block(bucket, 0); |
01225596 TM |
3353 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3354 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3355 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3356 | ||
3357 | /* Change the xe offset for all the xe because of the move. */ | |
3358 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3359 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3360 | for (i = 0; i < count; i++) | |
3361 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3362 | ||
3363 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3364 | offset, size, off_change); | |
3365 | ||
3366 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3367 | cmp_xe, swap_xe); | |
3368 | } | |
3369 | ||
3370 | /* | |
3371 | * After we move xattr from block to index btree, we have to | |
3372 | * update ocfs2_xattr_search to the new xe and base. | |
3373 | * | |
3374 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3375 | * While if the entry is in index b-tree, "bucket" indicates the | |
3376 | * real place of the xattr. | |
3377 | */ | |
178eeac3 JB |
3378 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3379 | struct ocfs2_xattr_search *xs, | |
3380 | struct buffer_head *old_bh) | |
01225596 | 3381 | { |
01225596 TM |
3382 | char *buf = old_bh->b_data; |
3383 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3384 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3385 | int i; |
01225596 | 3386 | |
ba937127 | 3387 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3388 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3389 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3390 | ||
178eeac3 JB |
3391 | if (xs->not_found) |
3392 | return; | |
01225596 | 3393 | |
178eeac3 JB |
3394 | i = xs->here - old_xh->xh_entries; |
3395 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3396 | } |
3397 | ||
3398 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3399 | struct ocfs2_xattr_search *xs, |
3400 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3401 | { |
85db90e7 | 3402 | int ret; |
01225596 TM |
3403 | u32 bit_off, len; |
3404 | u64 blkno; | |
85db90e7 | 3405 | handle_t *handle = ctxt->handle; |
01225596 TM |
3406 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3407 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3408 | struct buffer_head *xb_bh = xs->xattr_bh; |
3409 | struct ocfs2_xattr_block *xb = | |
3410 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3411 | struct ocfs2_xattr_tree_root *xr; | |
3412 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3413 | |
3414 | mlog(0, "create xattr index block for %llu\n", | |
3415 | (unsigned long long)xb_bh->b_blocknr); | |
3416 | ||
3417 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3418 | BUG_ON(!xs->bucket); |
01225596 | 3419 | |
01225596 TM |
3420 | /* |
3421 | * XXX: | |
3422 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3423 | * if performance becomes a problem later. | |
3424 | */ | |
3425 | down_write(&oi->ip_alloc_sem); | |
3426 | ||
84008972 JB |
3427 | ret = ocfs2_journal_access_xb(handle, inode, xb_bh, |
3428 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
3429 | if (ret) { |
3430 | mlog_errno(ret); | |
85db90e7 | 3431 | goto out; |
01225596 TM |
3432 | } |
3433 | ||
78f30c31 TM |
3434 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3435 | 1, 1, &bit_off, &len); | |
01225596 TM |
3436 | if (ret) { |
3437 | mlog_errno(ret); | |
85db90e7 | 3438 | goto out; |
01225596 TM |
3439 | } |
3440 | ||
3441 | /* | |
3442 | * The bucket may spread in many blocks, and | |
3443 | * we will only touch the 1st block and the last block | |
3444 | * in the whole bucket(one for entry and one for data). | |
3445 | */ | |
3446 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3447 | ||
de29c085 MF |
3448 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3449 | (unsigned long long)blkno); | |
01225596 | 3450 | |
178eeac3 JB |
3451 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3452 | if (ret) { | |
01225596 | 3453 | mlog_errno(ret); |
85db90e7 | 3454 | goto out; |
01225596 TM |
3455 | } |
3456 | ||
178eeac3 JB |
3457 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3458 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3459 | if (ret) { |
3460 | mlog_errno(ret); | |
85db90e7 | 3461 | goto out; |
01225596 TM |
3462 | } |
3463 | ||
178eeac3 JB |
3464 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3465 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3466 | |
178eeac3 | 3467 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3468 | |
3469 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3470 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3471 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3472 | ||
3473 | xr = &xb->xb_attrs.xb_root; | |
3474 | xr->xt_clusters = cpu_to_le32(1); | |
3475 | xr->xt_last_eb_blk = 0; | |
3476 | xr->xt_list.l_tree_depth = 0; | |
3477 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3478 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3479 | ||
3480 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3481 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3482 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3483 | ||
3484 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3485 | ||
85db90e7 | 3486 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3487 | |
85db90e7 | 3488 | out: |
01225596 TM |
3489 | up_write(&oi->ip_alloc_sem); |
3490 | ||
01225596 TM |
3491 | return ret; |
3492 | } | |
3493 | ||
3494 | static int cmp_xe_offset(const void *a, const void *b) | |
3495 | { | |
3496 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3497 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3498 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3499 | ||
3500 | if (l_name_offset < r_name_offset) | |
3501 | return 1; | |
3502 | if (l_name_offset > r_name_offset) | |
3503 | return -1; | |
3504 | return 0; | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | * defrag a xattr bucket if we find that the bucket has some | |
3509 | * holes beteen name/value pairs. | |
3510 | * We will move all the name/value pairs to the end of the bucket | |
3511 | * so that we can spare some space for insertion. | |
3512 | */ | |
3513 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3514 | handle_t *handle, |
01225596 TM |
3515 | struct ocfs2_xattr_bucket *bucket) |
3516 | { | |
3517 | int ret, i; | |
3518 | size_t end, offset, len, value_len; | |
3519 | struct ocfs2_xattr_header *xh; | |
3520 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3521 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3522 | u16 xh_free_start; |
01225596 | 3523 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3524 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3525 | |
3526 | /* | |
3527 | * In order to make the operation more efficient and generic, | |
3528 | * we copy all the blocks into a contiguous memory and do the | |
3529 | * defragment there, so if anything is error, we will not touch | |
3530 | * the real block. | |
3531 | */ | |
3532 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3533 | if (!bucket_buf) { | |
3534 | ret = -EIO; | |
3535 | goto out; | |
3536 | } | |
3537 | ||
3538 | buf = bucket_buf; | |
1c32a2fd TM |
3539 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3540 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3541 | |
1c32a2fd | 3542 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3543 | OCFS2_JOURNAL_ACCESS_WRITE); |
3544 | if (ret < 0) { | |
3545 | mlog_errno(ret); | |
85db90e7 | 3546 | goto out; |
01225596 TM |
3547 | } |
3548 | ||
3549 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3550 | entries = (char *)xh->xh_entries; | |
3551 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3552 | ||
3553 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3554 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3555 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3556 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3557 | |
3558 | /* | |
3559 | * sort all the entries by their offset. | |
3560 | * the largest will be the first, so that we can | |
3561 | * move them to the end one by one. | |
3562 | */ | |
3563 | sort(entries, le16_to_cpu(xh->xh_count), | |
3564 | sizeof(struct ocfs2_xattr_entry), | |
3565 | cmp_xe_offset, swap_xe); | |
3566 | ||
3567 | /* Move all name/values to the end of the bucket. */ | |
3568 | xe = xh->xh_entries; | |
3569 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3570 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3571 | offset = le16_to_cpu(xe->xe_name_offset); | |
3572 | if (ocfs2_xattr_is_local(xe)) | |
3573 | value_len = OCFS2_XATTR_SIZE( | |
3574 | le64_to_cpu(xe->xe_value_size)); | |
3575 | else | |
3576 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3577 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3578 | ||
3579 | /* | |
3580 | * We must make sure that the name/value pair | |
3581 | * exist in the same block. So adjust end to | |
3582 | * the previous block end if needed. | |
3583 | */ | |
3584 | if (((end - len) / blocksize != | |
3585 | (end - 1) / blocksize)) | |
3586 | end = end - end % blocksize; | |
3587 | ||
3588 | if (end > offset + len) { | |
3589 | memmove(bucket_buf + end - len, | |
3590 | bucket_buf + offset, len); | |
3591 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3592 | } | |
3593 | ||
3594 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3595 | "bucket %llu\n", (unsigned long long)blkno); | |
3596 | ||
3597 | end -= len; | |
3598 | } | |
3599 | ||
3600 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3601 | "bucket %llu\n", (unsigned long long)blkno); | |
3602 | ||
3603 | if (xh_free_start == end) | |
85db90e7 | 3604 | goto out; |
01225596 TM |
3605 | |
3606 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3607 | xh->xh_free_start = cpu_to_le16(end); | |
3608 | ||
3609 | /* sort the entries by their name_hash. */ | |
3610 | sort(entries, le16_to_cpu(xh->xh_count), | |
3611 | sizeof(struct ocfs2_xattr_entry), | |
3612 | cmp_xe, swap_xe); | |
3613 | ||
3614 | buf = bucket_buf; | |
1c32a2fd TM |
3615 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3616 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3617 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3618 | |
01225596 | 3619 | out: |
01225596 TM |
3620 | kfree(bucket_buf); |
3621 | return ret; | |
3622 | } | |
3623 | ||
3624 | /* | |
b5c03e74 JB |
3625 | * prev_blkno points to the start of an existing extent. new_blkno |
3626 | * points to a newly allocated extent. Because we know each of our | |
3627 | * clusters contains more than bucket, we can easily split one cluster | |
3628 | * at a bucket boundary. So we take the last cluster of the existing | |
3629 | * extent and split it down the middle. We move the last half of the | |
3630 | * buckets in the last cluster of the existing extent over to the new | |
3631 | * extent. | |
01225596 | 3632 | * |
b5c03e74 JB |
3633 | * first_bh is the buffer at prev_blkno so we can update the existing |
3634 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3635 | * to insert our xattr. If the bucket move places the target in the new | |
3636 | * extent, we'll update first_bh and header_bh after modifying the old | |
3637 | * extent. | |
3638 | * | |
3639 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3640 | */ |
3641 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3642 | handle_t *handle, | |
41cb8148 JB |
3643 | struct ocfs2_xattr_bucket *first, |
3644 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3645 | u64 new_blkno, |
01225596 TM |
3646 | u32 num_clusters, |
3647 | u32 *first_hash) | |
3648 | { | |
c58b6032 | 3649 | int ret; |
41cb8148 JB |
3650 | struct super_block *sb = inode->i_sb; |
3651 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3652 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3653 | int to_move = num_buckets / 2; |
c58b6032 | 3654 | u64 src_blkno; |
41cb8148 JB |
3655 | u64 last_cluster_blkno = bucket_blkno(first) + |
3656 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3657 | |
41cb8148 JB |
3658 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3659 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3660 | |
01225596 | 3661 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3662 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3663 | |
41cb8148 | 3664 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3665 | last_cluster_blkno, new_blkno, |
3666 | to_move, first_hash); | |
01225596 TM |
3667 | if (ret) { |
3668 | mlog_errno(ret); | |
3669 | goto out; | |
3670 | } | |
3671 | ||
c58b6032 JB |
3672 | /* This is the first bucket that got moved */ |
3673 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3674 | |
b5c03e74 | 3675 | /* |
c58b6032 | 3676 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3677 | * update first and target. |
b5c03e74 | 3678 | */ |
41cb8148 | 3679 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3680 | /* Find the block for the new target bucket */ |
3681 | src_blkno = new_blkno + | |
41cb8148 JB |
3682 | (bucket_blkno(target) - src_blkno); |
3683 | ||
3684 | ocfs2_xattr_bucket_relse(first); | |
3685 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3686 | |
b5c03e74 | 3687 | /* |
c58b6032 | 3688 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3689 | * journal from ocfs2_cp_xattr_bucket(). |
3690 | */ | |
41cb8148 | 3691 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3692 | if (ret) { |
3693 | mlog_errno(ret); | |
3694 | goto out; | |
3695 | } | |
41cb8148 JB |
3696 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3697 | if (ret) | |
b5c03e74 | 3698 | mlog_errno(ret); |
01225596 | 3699 | |
01225596 TM |
3700 | } |
3701 | ||
01225596 | 3702 | out: |
01225596 TM |
3703 | return ret; |
3704 | } | |
3705 | ||
01225596 | 3706 | /* |
80bcaf34 TM |
3707 | * Find the suitable pos when we divide a bucket into 2. |
3708 | * We have to make sure the xattrs with the same hash value exist | |
3709 | * in the same bucket. | |
3710 | * | |
3711 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3712 | * place where the hash value changes. Try to find the most even split. | |
3713 | * The most common case is that all entries have different hash values, | |
3714 | * and the first check we make will find a place to split. | |
3715 | */ | |
3716 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3717 | { | |
3718 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3719 | int count = le16_to_cpu(xh->xh_count); | |
3720 | int delta, middle = count / 2; | |
3721 | ||
3722 | /* | |
3723 | * We start at the middle. Each step gets farther away in both | |
3724 | * directions. We therefore hit the change in hash value | |
3725 | * nearest to the middle. Note that this loop does not execute for | |
3726 | * count < 2. | |
3727 | */ | |
3728 | for (delta = 0; delta < middle; delta++) { | |
3729 | /* Let's check delta earlier than middle */ | |
3730 | if (cmp_xe(&entries[middle - delta - 1], | |
3731 | &entries[middle - delta])) | |
3732 | return middle - delta; | |
3733 | ||
3734 | /* For even counts, don't walk off the end */ | |
3735 | if ((middle + delta + 1) == count) | |
3736 | continue; | |
3737 | ||
3738 | /* Now try delta past middle */ | |
3739 | if (cmp_xe(&entries[middle + delta], | |
3740 | &entries[middle + delta + 1])) | |
3741 | return middle + delta + 1; | |
3742 | } | |
3743 | ||
3744 | /* Every entry had the same hash */ | |
3745 | return count; | |
3746 | } | |
3747 | ||
3748 | /* | |
3749 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3750 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3751 | * |
3752 | * Normally half of the xattrs will be moved. But we have to make | |
3753 | * sure that the xattrs with the same hash value are stored in the | |
3754 | * same bucket. If all the xattrs in this bucket have the same hash | |
3755 | * value, the new bucket will be initialized as an empty one and the | |
3756 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3757 | */ |
80bcaf34 TM |
3758 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3759 | handle_t *handle, | |
3760 | u64 blk, | |
3761 | u64 new_blk, | |
3762 | u32 *first_hash, | |
3763 | int new_bucket_head) | |
01225596 TM |
3764 | { |
3765 | int ret, i; | |
80bcaf34 | 3766 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3767 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3768 | struct ocfs2_xattr_header *xh; |
3769 | struct ocfs2_xattr_entry *xe; | |
3770 | int blocksize = inode->i_sb->s_blocksize; | |
3771 | ||
80bcaf34 | 3772 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3773 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3774 | |
ba937127 JB |
3775 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3776 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3777 | if (!s_bucket || !t_bucket) { | |
3778 | ret = -ENOMEM; | |
3779 | mlog_errno(ret); | |
3780 | goto out; | |
3781 | } | |
01225596 | 3782 | |
ba937127 | 3783 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3784 | if (ret) { |
3785 | mlog_errno(ret); | |
3786 | goto out; | |
3787 | } | |
3788 | ||
ba937127 | 3789 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3790 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3791 | if (ret) { |
3792 | mlog_errno(ret); | |
3793 | goto out; | |
3794 | } | |
3795 | ||
784b816a JB |
3796 | /* |
3797 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3798 | * there's no need to read it. | |
3799 | */ | |
ba937127 | 3800 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3801 | if (ret) { |
3802 | mlog_errno(ret); | |
3803 | goto out; | |
3804 | } | |
3805 | ||
2b656c1d JB |
3806 | /* |
3807 | * Hey, if we're overwriting t_bucket, what difference does | |
3808 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
3809 | * same part of ocfs2_cp_xattr_bucket(). | |
3810 | */ | |
ba937127 | 3811 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3812 | new_bucket_head ? |
3813 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3814 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3815 | if (ret) { | |
3816 | mlog_errno(ret); | |
3817 | goto out; | |
01225596 TM |
3818 | } |
3819 | ||
ba937127 | 3820 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3821 | count = le16_to_cpu(xh->xh_count); |
3822 | start = ocfs2_xattr_find_divide_pos(xh); | |
3823 | ||
3824 | if (start == count) { | |
3825 | xe = &xh->xh_entries[start-1]; | |
3826 | ||
3827 | /* | |
3828 | * initialized a new empty bucket here. | |
3829 | * The hash value is set as one larger than | |
3830 | * that of the last entry in the previous bucket. | |
3831 | */ | |
ba937127 JB |
3832 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3833 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3834 | |
ba937127 | 3835 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3836 | xh->xh_free_start = cpu_to_le16(blocksize); |
3837 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3838 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3839 | ||
3840 | goto set_num_buckets; | |
3841 | } | |
3842 | ||
01225596 | 3843 | /* copy the whole bucket to the new first. */ |
ba937127 | 3844 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3845 | |
3846 | /* update the new bucket. */ | |
ba937127 | 3847 | xh = bucket_xh(t_bucket); |
01225596 TM |
3848 | |
3849 | /* | |
3850 | * Calculate the total name/value len and xh_free_start for | |
3851 | * the old bucket first. | |
3852 | */ | |
3853 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3854 | name_value_len = 0; | |
3855 | for (i = 0; i < start; i++) { | |
3856 | xe = &xh->xh_entries[i]; | |
3857 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3858 | if (ocfs2_xattr_is_local(xe)) | |
3859 | xe_len += | |
3860 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3861 | else | |
3862 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3863 | name_value_len += xe_len; | |
3864 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3865 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3866 | } | |
3867 | ||
3868 | /* | |
3869 | * Now begin the modification to the new bucket. | |
3870 | * | |
3871 | * In the new bucket, We just move the xattr entry to the beginning | |
3872 | * and don't touch the name/value. So there will be some holes in the | |
3873 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3874 | * called. | |
3875 | */ | |
3876 | xe = &xh->xh_entries[start]; | |
3877 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3878 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3879 | (int)((char *)xe - (char *)xh), |
3880 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3881 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3882 | xe = &xh->xh_entries[count - start]; | |
3883 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3884 | memset((char *)xe, 0, len); | |
3885 | ||
3886 | le16_add_cpu(&xh->xh_count, -start); | |
3887 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3888 | ||
3889 | /* Calculate xh_free_start for the new bucket. */ | |
3890 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3891 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3892 | xe = &xh->xh_entries[i]; | |
3893 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3894 | if (ocfs2_xattr_is_local(xe)) | |
3895 | xe_len += | |
3896 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3897 | else | |
3898 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3899 | if (le16_to_cpu(xe->xe_name_offset) < | |
3900 | le16_to_cpu(xh->xh_free_start)) | |
3901 | xh->xh_free_start = xe->xe_name_offset; | |
3902 | } | |
3903 | ||
80bcaf34 | 3904 | set_num_buckets: |
01225596 TM |
3905 | /* set xh->xh_num_buckets for the new xh. */ |
3906 | if (new_bucket_head) | |
3907 | xh->xh_num_buckets = cpu_to_le16(1); | |
3908 | else | |
3909 | xh->xh_num_buckets = 0; | |
3910 | ||
ba937127 | 3911 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3912 | |
3913 | /* store the first_hash of the new bucket. */ | |
3914 | if (first_hash) | |
3915 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3916 | ||
3917 | /* | |
80bcaf34 TM |
3918 | * Now only update the 1st block of the old bucket. If we |
3919 | * just added a new empty bucket, there is no need to modify | |
3920 | * it. | |
01225596 | 3921 | */ |
80bcaf34 TM |
3922 | if (start == count) |
3923 | goto out; | |
3924 | ||
ba937127 | 3925 | xh = bucket_xh(s_bucket); |
01225596 TM |
3926 | memset(&xh->xh_entries[start], 0, |
3927 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3928 | xh->xh_count = cpu_to_le16(start); | |
3929 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3930 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3931 | ||
ba937127 | 3932 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3933 | |
3934 | out: | |
ba937127 JB |
3935 | ocfs2_xattr_bucket_free(s_bucket); |
3936 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3937 | |
3938 | return ret; | |
3939 | } | |
3940 | ||
3941 | /* | |
3942 | * Copy xattr from one bucket to another bucket. | |
3943 | * | |
3944 | * The caller must make sure that the journal transaction | |
3945 | * has enough space for journaling. | |
3946 | */ | |
3947 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3948 | handle_t *handle, | |
3949 | u64 s_blkno, | |
3950 | u64 t_blkno, | |
3951 | int t_is_new) | |
3952 | { | |
4980c6da | 3953 | int ret; |
ba937127 | 3954 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3955 | |
3956 | BUG_ON(s_blkno == t_blkno); | |
3957 | ||
3958 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3959 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3960 | t_is_new); | |
01225596 | 3961 | |
ba937127 JB |
3962 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3963 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3964 | if (!s_bucket || !t_bucket) { | |
3965 | ret = -ENOMEM; | |
3966 | mlog_errno(ret); | |
3967 | goto out; | |
3968 | } | |
92de109a | 3969 | |
ba937127 | 3970 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
3971 | if (ret) |
3972 | goto out; | |
3973 | ||
784b816a JB |
3974 | /* |
3975 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3976 | * there's no need to read it. | |
3977 | */ | |
ba937127 | 3978 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3979 | if (ret) |
3980 | goto out; | |
3981 | ||
2b656c1d JB |
3982 | /* |
3983 | * Hey, if we're overwriting t_bucket, what difference does | |
3984 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
3985 | * cluster to fill, we came here from |
3986 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
3987 | * ACCESS_CREATE is required. But we also might have moved data | |
3988 | * out of t_bucket before extending back into it. | |
3989 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
3990 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
3991 | * and copied out the end of the old extent. Then it re-extends |
3992 | * the old extent back to create space for new xattrs. That's | |
3993 | * how we get here, and the bucket isn't really new. | |
3994 | */ | |
ba937127 | 3995 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3996 | t_is_new ? |
3997 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3998 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3999 | if (ret) | |
4000 | goto out; | |
01225596 | 4001 | |
ba937127 JB |
4002 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4003 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4004 | |
4005 | out: | |
ba937127 JB |
4006 | ocfs2_xattr_bucket_free(t_bucket); |
4007 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4008 | |
4009 | return ret; | |
4010 | } | |
4011 | ||
4012 | /* | |
874d65af JB |
4013 | * src_blk points to the start of an existing extent. last_blk points to |
4014 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4015 | * extent. We copy the buckets from the cluster at last_blk to the new |
4016 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4017 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4018 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4019 | * by the same amount. | |
01225596 | 4020 | */ |
54ecb6b6 JB |
4021 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4022 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4023 | unsigned int start_bucket, | |
4024 | u32 *first_hash) | |
01225596 TM |
4025 | { |
4026 | int i, ret, credits; | |
4027 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4028 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4029 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4030 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4031 | |
874d65af JB |
4032 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4033 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4034 | |
54ecb6b6 JB |
4035 | BUG_ON(start_bucket >= num_buckets); |
4036 | if (start_bucket) { | |
4037 | num_buckets -= start_bucket; | |
4038 | last_blk += (start_bucket * blks_per_bucket); | |
4039 | } | |
4040 | ||
15d60929 JB |
4041 | /* The first bucket of the original extent */ |
4042 | old_first = ocfs2_xattr_bucket_new(inode); | |
4043 | /* The first bucket of the new extent */ | |
4044 | new_first = ocfs2_xattr_bucket_new(inode); | |
4045 | if (!old_first || !new_first) { | |
4046 | ret = -ENOMEM; | |
4047 | mlog_errno(ret); | |
4048 | goto out; | |
4049 | } | |
4050 | ||
874d65af | 4051 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4052 | if (ret) { |
4053 | mlog_errno(ret); | |
4054 | goto out; | |
4055 | } | |
4056 | ||
01225596 | 4057 | /* |
54ecb6b6 JB |
4058 | * We need to update the first bucket of the old extent and all |
4059 | * the buckets going to the new extent. | |
01225596 | 4060 | */ |
54ecb6b6 JB |
4061 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4062 | handle->h_buffer_credits; | |
01225596 TM |
4063 | ret = ocfs2_extend_trans(handle, credits); |
4064 | if (ret) { | |
4065 | mlog_errno(ret); | |
4066 | goto out; | |
4067 | } | |
4068 | ||
15d60929 JB |
4069 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4070 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4071 | if (ret) { |
4072 | mlog_errno(ret); | |
4073 | goto out; | |
4074 | } | |
4075 | ||
4076 | for (i = 0; i < num_buckets; i++) { | |
4077 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4078 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4079 | to_blk + (i * blks_per_bucket), |
4080 | 1); | |
01225596 TM |
4081 | if (ret) { |
4082 | mlog_errno(ret); | |
4083 | goto out; | |
4084 | } | |
01225596 TM |
4085 | } |
4086 | ||
15d60929 JB |
4087 | /* |
4088 | * Get the new bucket ready before we dirty anything | |
4089 | * (This actually shouldn't fail, because we already dirtied | |
4090 | * it once in ocfs2_cp_xattr_bucket()). | |
4091 | */ | |
4092 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4093 | if (ret) { | |
01225596 TM |
4094 | mlog_errno(ret); |
4095 | goto out; | |
4096 | } | |
15d60929 JB |
4097 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4098 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4099 | if (ret) { |
4100 | mlog_errno(ret); | |
4101 | goto out; | |
4102 | } | |
4103 | ||
15d60929 JB |
4104 | /* Now update the headers */ |
4105 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4106 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4107 | |
15d60929 JB |
4108 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4109 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4110 | |
4111 | if (first_hash) | |
15d60929 JB |
4112 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4113 | ||
01225596 | 4114 | out: |
15d60929 JB |
4115 | ocfs2_xattr_bucket_free(new_first); |
4116 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4117 | return ret; |
4118 | } | |
4119 | ||
4120 | /* | |
80bcaf34 | 4121 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4122 | * This function should only be called when bucket size == cluster size. |
4123 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4124 | */ | |
80bcaf34 TM |
4125 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4126 | handle_t *handle, | |
4127 | u64 prev_blk, | |
4128 | u64 new_blk, | |
4129 | u32 *first_hash) | |
01225596 TM |
4130 | { |
4131 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4132 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4133 | |
4134 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4135 | ||
4136 | ret = ocfs2_extend_trans(handle, credits); | |
4137 | if (ret) { | |
4138 | mlog_errno(ret); | |
4139 | return ret; | |
4140 | } | |
4141 | ||
4142 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4143 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4144 | new_blk, first_hash, 1); | |
01225596 TM |
4145 | } |
4146 | ||
4147 | /* | |
4148 | * Move some xattrs from the old cluster to the new one since they are not | |
4149 | * contiguous in ocfs2 xattr tree. | |
4150 | * | |
4151 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4152 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4153 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4154 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4155 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4156 | * to extend the insert bucket. | |
4157 | * | |
4158 | * The problem is how much xattr should we move to the new one and when should | |
4159 | * we update first_bh and header_bh? | |
4160 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4161 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4162 | * update the first_bh and header_bh if the insert bucket has been moved | |
4163 | * to the new cluster. | |
4164 | * 2. If cluster_size == bucket_size: | |
4165 | * a) If the previous extent rec has more than one cluster and the insert | |
4166 | * place isn't in the last cluster, copy the entire last cluster to the | |
4167 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4168 | * since they will not be moved into the new cluster. | |
4169 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4170 | * the new one. And we set the extend flag to zero if the insert place is | |
4171 | * moved into the new allocated cluster since no extend is needed. | |
4172 | */ | |
4173 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4174 | handle_t *handle, | |
012ee910 JB |
4175 | struct ocfs2_xattr_bucket *first, |
4176 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4177 | u64 new_blk, |
01225596 TM |
4178 | u32 prev_clusters, |
4179 | u32 *v_start, | |
4180 | int *extend) | |
4181 | { | |
92cf3adf | 4182 | int ret; |
01225596 TM |
4183 | |
4184 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4185 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4186 | (unsigned long long)new_blk); |
01225596 | 4187 | |
41cb8148 | 4188 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4189 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4190 | handle, | |
41cb8148 | 4191 | first, target, |
01225596 | 4192 | new_blk, |
01225596 TM |
4193 | prev_clusters, |
4194 | v_start); | |
012ee910 | 4195 | if (ret) |
41cb8148 | 4196 | mlog_errno(ret); |
41cb8148 | 4197 | } else { |
92cf3adf JB |
4198 | /* The start of the last cluster in the first extent */ |
4199 | u64 last_blk = bucket_blkno(first) + | |
4200 | ((prev_clusters - 1) * | |
4201 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4202 | |
012ee910 | 4203 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4204 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4205 | bucket_blkno(first), |
54ecb6b6 | 4206 | last_blk, new_blk, 0, |
01225596 | 4207 | v_start); |
012ee910 JB |
4208 | if (ret) |
4209 | mlog_errno(ret); | |
4210 | } else { | |
80bcaf34 TM |
4211 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4212 | last_blk, new_blk, | |
4213 | v_start); | |
012ee910 JB |
4214 | if (ret) |
4215 | mlog_errno(ret); | |
01225596 | 4216 | |
92cf3adf | 4217 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4218 | *extend = 0; |
4219 | } | |
4220 | } | |
4221 | ||
4222 | return ret; | |
4223 | } | |
4224 | ||
4225 | /* | |
4226 | * Add a new cluster for xattr storage. | |
4227 | * | |
4228 | * If the new cluster is contiguous with the previous one, it will be | |
4229 | * appended to the same extent record, and num_clusters will be updated. | |
4230 | * If not, we will insert a new extent for it and move some xattrs in | |
4231 | * the last cluster into the new allocated one. | |
4232 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4233 | * lose the benefits of hashing because we'll have to search large leaves. | |
4234 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4235 | * if it's bigger). | |
4236 | * | |
4237 | * first_bh is the first block of the previous extent rec and header_bh | |
4238 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4239 | * when the header_bh is moved into the new cluster. | |
4240 | */ | |
4241 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4242 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4243 | struct ocfs2_xattr_bucket *first, |
4244 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4245 | u32 *num_clusters, |
4246 | u32 prev_cpos, | |
78f30c31 TM |
4247 | int *extend, |
4248 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4249 | { |
85db90e7 | 4250 | int ret; |
01225596 TM |
4251 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4252 | u32 prev_clusters = *num_clusters; | |
4253 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4254 | u64 block; | |
85db90e7 | 4255 | handle_t *handle = ctxt->handle; |
01225596 | 4256 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4257 | struct ocfs2_extent_tree et; |
01225596 TM |
4258 | |
4259 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4260 | "previous xattr blkno = %llu\n", | |
4261 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4262 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4263 | |
8d6220d6 | 4264 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c | 4265 | |
84008972 JB |
4266 | ret = ocfs2_journal_access_xb(handle, inode, root_bh, |
4267 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4268 | if (ret < 0) { |
4269 | mlog_errno(ret); | |
4270 | goto leave; | |
4271 | } | |
4272 | ||
78f30c31 | 4273 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4274 | clusters_to_add, &bit_off, &num_bits); |
4275 | if (ret < 0) { | |
4276 | if (ret != -ENOSPC) | |
4277 | mlog_errno(ret); | |
4278 | goto leave; | |
4279 | } | |
4280 | ||
4281 | BUG_ON(num_bits > clusters_to_add); | |
4282 | ||
4283 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4284 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4285 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4286 | ||
ed29c0ca | 4287 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4288 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4289 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4290 | /* | |
4291 | * If this cluster is contiguous with the old one and | |
4292 | * adding this new cluster, we don't surpass the limit of | |
4293 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4294 | * initialized and used like other buckets in the previous | |
4295 | * cluster. | |
4296 | * So add it as a contiguous one. The caller will handle | |
4297 | * its init process. | |
4298 | */ | |
4299 | v_start = prev_cpos + prev_clusters; | |
4300 | *num_clusters = prev_clusters + num_bits; | |
4301 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4302 | num_bits); | |
4303 | } else { | |
4304 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4305 | handle, | |
012ee910 JB |
4306 | first, |
4307 | target, | |
01225596 | 4308 | block, |
01225596 TM |
4309 | prev_clusters, |
4310 | &v_start, | |
4311 | extend); | |
4312 | if (ret) { | |
4313 | mlog_errno(ret); | |
4314 | goto leave; | |
4315 | } | |
4316 | } | |
4317 | ||
4318 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4319 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c | 4320 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
78f30c31 | 4321 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4322 | if (ret < 0) { |
4323 | mlog_errno(ret); | |
4324 | goto leave; | |
4325 | } | |
4326 | ||
4327 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4328 | if (ret < 0) |
01225596 | 4329 | mlog_errno(ret); |
01225596 TM |
4330 | |
4331 | leave: | |
01225596 TM |
4332 | return ret; |
4333 | } | |
4334 | ||
4335 | /* | |
92de109a JB |
4336 | * We are given an extent. 'first' is the bucket at the very front of |
4337 | * the extent. The extent has space for an additional bucket past | |
4338 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4339 | * of the target bucket. We wish to shift every bucket past the target | |
4340 | * down one, filling in that additional space. When we get back to the | |
4341 | * target, we split the target between itself and the now-empty bucket | |
4342 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4343 | */ |
4344 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4345 | handle_t *handle, |
92de109a JB |
4346 | struct ocfs2_xattr_bucket *first, |
4347 | u64 target_blk, | |
01225596 TM |
4348 | u32 num_clusters) |
4349 | { | |
4350 | int ret, credits; | |
4351 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4352 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4353 | u64 end_blk; |
4354 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4355 | |
4356 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4357 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4358 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4359 | |
92de109a JB |
4360 | /* The extent must have room for an additional bucket */ |
4361 | BUG_ON(new_bucket >= | |
4362 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4363 | |
92de109a JB |
4364 | /* end_blk points to the last existing bucket */ |
4365 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4366 | |
4367 | /* | |
92de109a JB |
4368 | * end_blk is the start of the last existing bucket. |
4369 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4370 | * every bucket after it up to, but not including, the last | |
4371 | * existing bucket. Then we add the last existing bucket, the | |
4372 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4373 | */ |
92de109a | 4374 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4375 | handle->h_buffer_credits; |
4376 | ret = ocfs2_extend_trans(handle, credits); | |
4377 | if (ret) { | |
01225596 TM |
4378 | mlog_errno(ret); |
4379 | goto out; | |
4380 | } | |
4381 | ||
92de109a JB |
4382 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4383 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4384 | if (ret) { |
4385 | mlog_errno(ret); | |
85db90e7 | 4386 | goto out; |
01225596 TM |
4387 | } |
4388 | ||
92de109a | 4389 | while (end_blk != target_blk) { |
01225596 TM |
4390 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4391 | end_blk + blk_per_bucket, 0); | |
4392 | if (ret) | |
85db90e7 | 4393 | goto out; |
01225596 TM |
4394 | end_blk -= blk_per_bucket; |
4395 | } | |
4396 | ||
92de109a JB |
4397 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4398 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4399 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4400 | |
92de109a JB |
4401 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4402 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4403 | |
01225596 TM |
4404 | out: |
4405 | return ret; | |
4406 | } | |
4407 | ||
4408 | /* | |
91f2033f JB |
4409 | * Add new xattr bucket in an extent record and adjust the buckets |
4410 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4411 | * bucket we want to insert into. | |
01225596 | 4412 | * |
91f2033f JB |
4413 | * In the easy case, we will move all the buckets after target down by |
4414 | * one. Half of target's xattrs will be moved to the next bucket. | |
4415 | * | |
4416 | * If current cluster is full, we'll allocate a new one. This may not | |
4417 | * be contiguous. The underlying calls will make sure that there is | |
4418 | * space for the insert, shifting buckets around if necessary. | |
4419 | * 'target' may be moved by those calls. | |
01225596 TM |
4420 | */ |
4421 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4422 | struct buffer_head *xb_bh, | |
91f2033f | 4423 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4424 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4425 | { |
01225596 TM |
4426 | struct ocfs2_xattr_block *xb = |
4427 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4428 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4429 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4430 | u32 name_hash = |
4431 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4432 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4433 | int ret, num_buckets, extend = 1; |
4434 | u64 p_blkno; | |
4435 | u32 e_cpos, num_clusters; | |
92de109a | 4436 | /* The bucket at the front of the extent */ |
91f2033f | 4437 | struct ocfs2_xattr_bucket *first; |
01225596 | 4438 | |
91f2033f JB |
4439 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4440 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4441 | |
ed29c0ca | 4442 | /* The first bucket of the original extent */ |
92de109a | 4443 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4444 | if (!first) { |
92de109a JB |
4445 | ret = -ENOMEM; |
4446 | mlog_errno(ret); | |
4447 | goto out; | |
4448 | } | |
4449 | ||
01225596 TM |
4450 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4451 | &num_clusters, el); | |
4452 | if (ret) { | |
4453 | mlog_errno(ret); | |
4454 | goto out; | |
4455 | } | |
4456 | ||
ed29c0ca | 4457 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4458 | if (ret) { |
4459 | mlog_errno(ret); | |
4460 | goto out; | |
4461 | } | |
4462 | ||
ed29c0ca JB |
4463 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4464 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4465 | /* | |
4466 | * This can move first+target if the target bucket moves | |
4467 | * to the new extent. | |
4468 | */ | |
01225596 TM |
4469 | ret = ocfs2_add_new_xattr_cluster(inode, |
4470 | xb_bh, | |
ed29c0ca JB |
4471 | first, |
4472 | target, | |
01225596 TM |
4473 | &num_clusters, |
4474 | e_cpos, | |
78f30c31 TM |
4475 | &extend, |
4476 | ctxt); | |
01225596 TM |
4477 | if (ret) { |
4478 | mlog_errno(ret); | |
4479 | goto out; | |
4480 | } | |
4481 | } | |
4482 | ||
92de109a | 4483 | if (extend) { |
01225596 | 4484 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4485 | ctxt->handle, |
ed29c0ca JB |
4486 | first, |
4487 | bucket_blkno(target), | |
01225596 | 4488 | num_clusters); |
92de109a JB |
4489 | if (ret) |
4490 | mlog_errno(ret); | |
4491 | } | |
4492 | ||
01225596 | 4493 | out: |
92de109a | 4494 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4495 | |
01225596 TM |
4496 | return ret; |
4497 | } | |
4498 | ||
4499 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4500 | struct ocfs2_xattr_bucket *bucket, | |
4501 | int offs) | |
4502 | { | |
4503 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4504 | ||
4505 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4506 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4507 | } |
4508 | ||
4509 | /* | |
4510 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4511 | * |
4512 | * Note: "local" indicates the real data's locality. So we can't | |
4513 | * just its bucket locality by its length. | |
4514 | */ | |
4515 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4516 | struct ocfs2_xattr_info *xi, | |
4517 | struct ocfs2_xattr_search *xs, | |
4518 | u32 name_hash, | |
5a095611 | 4519 | int local) |
01225596 TM |
4520 | { |
4521 | struct ocfs2_xattr_entry *last, *xe; | |
4522 | int name_len = strlen(xi->name); | |
4523 | struct ocfs2_xattr_header *xh = xs->header; | |
4524 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4525 | size_t blocksize = inode->i_sb->s_blocksize; | |
4526 | char *val; | |
4527 | size_t offs, size, new_size; | |
4528 | ||
4529 | last = &xh->xh_entries[count]; | |
4530 | if (!xs->not_found) { | |
4531 | xe = xs->here; | |
4532 | offs = le16_to_cpu(xe->xe_name_offset); | |
4533 | if (ocfs2_xattr_is_local(xe)) | |
4534 | size = OCFS2_XATTR_SIZE(name_len) + | |
4535 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4536 | else | |
4537 | size = OCFS2_XATTR_SIZE(name_len) + | |
4538 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4539 | ||
4540 | /* | |
4541 | * If the new value will be stored outside, xi->value has been | |
4542 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4543 | * goes with xi->value_len, so we can set new_size safely here. | |
4544 | * See ocfs2_xattr_set_in_bucket. | |
4545 | */ | |
4546 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4547 | OCFS2_XATTR_SIZE(xi->value_len); | |
4548 | ||
4549 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4550 | if (xi->value) { | |
4551 | if (new_size > size) | |
4552 | goto set_new_name_value; | |
4553 | ||
4554 | /* Now replace the old value with new one. */ | |
4555 | if (local) | |
4556 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4557 | else | |
4558 | xe->xe_value_size = 0; | |
4559 | ||
4560 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4561 | xs->bucket, offs); |
01225596 TM |
4562 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4563 | size - OCFS2_XATTR_SIZE(name_len)); | |
4564 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4565 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4566 | xi->value, xi->value_len); | |
4567 | ||
4568 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4569 | ocfs2_xattr_set_local(xe, local); | |
4570 | return; | |
4571 | } else { | |
5a095611 TM |
4572 | /* |
4573 | * Remove the old entry if there is more than one. | |
4574 | * We don't remove the last entry so that we can | |
4575 | * use it to indicate the hash value of the empty | |
4576 | * bucket. | |
4577 | */ | |
01225596 | 4578 | last -= 1; |
01225596 | 4579 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4580 | if (xh->xh_count) { |
4581 | memmove(xe, xe + 1, | |
4582 | (void *)last - (void *)xe); | |
4583 | memset(last, 0, | |
4584 | sizeof(struct ocfs2_xattr_entry)); | |
4585 | } else | |
4586 | xh->xh_free_start = | |
4587 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4588 | ||
01225596 TM |
4589 | return; |
4590 | } | |
4591 | } else { | |
4592 | /* find a new entry for insert. */ | |
4593 | int low = 0, high = count - 1, tmp; | |
4594 | struct ocfs2_xattr_entry *tmp_xe; | |
4595 | ||
5a095611 | 4596 | while (low <= high && count) { |
01225596 TM |
4597 | tmp = (low + high) / 2; |
4598 | tmp_xe = &xh->xh_entries[tmp]; | |
4599 | ||
4600 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4601 | low = tmp + 1; | |
4602 | else if (name_hash < | |
4603 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4604 | high = tmp - 1; | |
06b240d8 TM |
4605 | else { |
4606 | low = tmp; | |
01225596 | 4607 | break; |
06b240d8 | 4608 | } |
01225596 TM |
4609 | } |
4610 | ||
4611 | xe = &xh->xh_entries[low]; | |
4612 | if (low != count) | |
4613 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4614 | ||
4615 | le16_add_cpu(&xh->xh_count, 1); | |
4616 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4617 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4618 | xe->xe_name_len = name_len; | |
4619 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4620 | } | |
4621 | ||
4622 | set_new_name_value: | |
4623 | /* Insert the new name+value. */ | |
4624 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4625 | ||
4626 | /* | |
4627 | * We must make sure that the name/value pair | |
4628 | * exists in the same block. | |
4629 | */ | |
4630 | offs = le16_to_cpu(xh->xh_free_start); | |
4631 | start = offs - size; | |
4632 | ||
4633 | if (start >> inode->i_sb->s_blocksize_bits != | |
4634 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4635 | offs = offs - offs % blocksize; | |
4636 | xh->xh_free_start = cpu_to_le16(offs); | |
4637 | } | |
4638 | ||
ba937127 | 4639 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4640 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4641 | ||
4642 | memset(val, 0, size); | |
4643 | memcpy(val, xi->name, name_len); | |
4644 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4645 | ||
4646 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4647 | ocfs2_xattr_set_local(xe, local); | |
4648 | xs->here = xe; | |
4649 | le16_add_cpu(&xh->xh_free_start, -size); | |
4650 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4651 | ||
4652 | return; | |
4653 | } | |
4654 | ||
01225596 TM |
4655 | /* |
4656 | * Set the xattr entry in the specified bucket. | |
4657 | * The bucket is indicated by xs->bucket and it should have the enough | |
4658 | * space for the xattr insertion. | |
4659 | */ | |
4660 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4661 | handle_t *handle, |
01225596 TM |
4662 | struct ocfs2_xattr_info *xi, |
4663 | struct ocfs2_xattr_search *xs, | |
4664 | u32 name_hash, | |
5a095611 | 4665 | int local) |
01225596 | 4666 | { |
1224be02 | 4667 | int ret; |
02dbf38d | 4668 | u64 blkno; |
01225596 | 4669 | |
ff1ec20e MF |
4670 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4671 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4672 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4673 | |
ba937127 | 4674 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4675 | blkno = bucket_blkno(xs->bucket); |
4676 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4677 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4678 | if (ret) { |
4679 | mlog_errno(ret); | |
4680 | goto out; | |
4681 | } | |
4682 | } | |
4683 | ||
ba937127 | 4684 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4685 | OCFS2_JOURNAL_ACCESS_WRITE); |
4686 | if (ret < 0) { | |
4687 | mlog_errno(ret); | |
4688 | goto out; | |
01225596 TM |
4689 | } |
4690 | ||
5a095611 | 4691 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4692 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4693 | |
01225596 | 4694 | out: |
01225596 TM |
4695 | return ret; |
4696 | } | |
4697 | ||
01225596 TM |
4698 | /* |
4699 | * Truncate the specified xe_off entry in xattr bucket. | |
4700 | * bucket is indicated by header_bh and len is the new length. | |
4701 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4702 | * | |
4703 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4704 | */ | |
4705 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4706 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4707 | int xe_off, |
78f30c31 TM |
4708 | int len, |
4709 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4710 | { |
4711 | int ret, offset; | |
4712 | u64 value_blk; | |
01225596 | 4713 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4714 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4715 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4716 | struct ocfs2_xattr_value_buf vb = { |
4717 | .vb_access = ocfs2_journal_access, | |
4718 | }; | |
01225596 TM |
4719 | |
4720 | xe = &xh->xh_entries[xe_off]; | |
4721 | ||
4722 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4723 | ||
4724 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4725 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4726 | ||
4727 | value_blk = offset / blocksize; | |
4728 | ||
4729 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4730 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4731 | |
b3e5d379 JB |
4732 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4733 | BUG_ON(!vb.vb_bh); | |
01225596 | 4734 | |
b3e5d379 JB |
4735 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4736 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4737 | |
548b0f22 JB |
4738 | /* |
4739 | * From here on out we have to dirty the bucket. The generic | |
4740 | * value calls only modify one of the bucket's bhs, but we need | |
4741 | * to send the bucket at once. So if they error, they *could* have | |
4742 | * modified something. We have to assume they did, and dirty | |
4743 | * the whole bucket. This leaves us in a consistent state. | |
4744 | */ | |
4745 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4746 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4747 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4748 | if (ret) { |
4749 | mlog_errno(ret); | |
554e7f9e TM |
4750 | goto out; |
4751 | } | |
4752 | ||
4753 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
4754 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4755 | if (ret) { | |
4756 | mlog_errno(ret); | |
4757 | goto out; | |
01225596 TM |
4758 | } |
4759 | ||
548b0f22 JB |
4760 | xe->xe_value_size = cpu_to_le64(len); |
4761 | ||
548b0f22 JB |
4762 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
4763 | ||
01225596 | 4764 | out: |
01225596 TM |
4765 | return ret; |
4766 | } | |
4767 | ||
4768 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4769 | struct ocfs2_xattr_search *xs, |
4770 | int len, | |
4771 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4772 | { |
4773 | int ret, offset; | |
4774 | struct ocfs2_xattr_entry *xe = xs->here; | |
4775 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4776 | ||
ba937127 | 4777 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4778 | |
4779 | offset = xe - xh->xh_entries; | |
548b0f22 | 4780 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 4781 | offset, len, ctxt); |
01225596 TM |
4782 | if (ret) |
4783 | mlog_errno(ret); | |
4784 | ||
4785 | return ret; | |
4786 | } | |
4787 | ||
4788 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4789 | handle_t *handle, |
01225596 TM |
4790 | struct ocfs2_xattr_search *xs, |
4791 | char *val, | |
4792 | int value_len) | |
4793 | { | |
712e53e4 | 4794 | int ret, offset, block_off; |
01225596 TM |
4795 | struct ocfs2_xattr_value_root *xv; |
4796 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
4797 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
4798 | void *base; | |
01225596 TM |
4799 | |
4800 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4801 | ||
712e53e4 TM |
4802 | ret = ocfs2_xattr_bucket_get_name_value(inode, xh, |
4803 | xe - xh->xh_entries, | |
4804 | &block_off, | |
4805 | &offset); | |
4806 | if (ret) { | |
4807 | mlog_errno(ret); | |
4808 | goto out; | |
4809 | } | |
01225596 | 4810 | |
712e53e4 TM |
4811 | base = bucket_block(xs->bucket, block_off); |
4812 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
4813 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 4814 | |
712e53e4 TM |
4815 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
4816 | xv, val, value_len); | |
4817 | if (ret) | |
4818 | mlog_errno(ret); | |
4819 | out: | |
4820 | return ret; | |
01225596 TM |
4821 | } |
4822 | ||
01225596 TM |
4823 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4824 | struct buffer_head *root_bh, | |
4825 | u64 blkno, | |
4826 | u32 cpos, | |
4827 | u32 len) | |
4828 | { | |
4829 | int ret; | |
4830 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4831 | struct inode *tl_inode = osb->osb_tl_inode; | |
4832 | handle_t *handle; | |
4833 | struct ocfs2_xattr_block *xb = | |
4834 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4835 | struct ocfs2_alloc_context *meta_ac = NULL; |
4836 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4837 | struct ocfs2_extent_tree et; |
4838 | ||
8d6220d6 | 4839 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4840 | |
4841 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4842 | ||
4843 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4844 | cpos, len, (unsigned long long)blkno); | |
4845 | ||
4846 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4847 | ||
f99b9b7c | 4848 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4849 | if (ret) { |
4850 | mlog_errno(ret); | |
4851 | return ret; | |
4852 | } | |
4853 | ||
4854 | mutex_lock(&tl_inode->i_mutex); | |
4855 | ||
4856 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4857 | ret = __ocfs2_flush_truncate_log(osb); | |
4858 | if (ret < 0) { | |
4859 | mlog_errno(ret); | |
4860 | goto out; | |
4861 | } | |
4862 | } | |
4863 | ||
a90714c1 | 4864 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 4865 | if (IS_ERR(handle)) { |
01225596 TM |
4866 | ret = -ENOMEM; |
4867 | mlog_errno(ret); | |
4868 | goto out; | |
4869 | } | |
4870 | ||
84008972 JB |
4871 | ret = ocfs2_journal_access_xb(handle, inode, root_bh, |
4872 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4873 | if (ret) { |
4874 | mlog_errno(ret); | |
4875 | goto out_commit; | |
4876 | } | |
4877 | ||
f99b9b7c JB |
4878 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4879 | &dealloc); | |
01225596 TM |
4880 | if (ret) { |
4881 | mlog_errno(ret); | |
4882 | goto out_commit; | |
4883 | } | |
4884 | ||
4885 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4886 | ||
4887 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4888 | if (ret) { | |
4889 | mlog_errno(ret); | |
4890 | goto out_commit; | |
4891 | } | |
4892 | ||
4893 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4894 | if (ret) | |
4895 | mlog_errno(ret); | |
4896 | ||
4897 | out_commit: | |
4898 | ocfs2_commit_trans(osb, handle); | |
4899 | out: | |
4900 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4901 | ||
4902 | mutex_unlock(&tl_inode->i_mutex); | |
4903 | ||
4904 | if (meta_ac) | |
4905 | ocfs2_free_alloc_context(meta_ac); | |
4906 | ||
4907 | ocfs2_run_deallocs(osb, &dealloc); | |
4908 | ||
4909 | return ret; | |
4910 | } | |
4911 | ||
01225596 | 4912 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 4913 | handle_t *handle, |
01225596 TM |
4914 | struct ocfs2_xattr_search *xs) |
4915 | { | |
ba937127 | 4916 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4917 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4918 | le16_to_cpu(xh->xh_count) - 1]; | |
4919 | int ret = 0; | |
4920 | ||
ba937127 | 4921 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4922 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4923 | if (ret) { |
4924 | mlog_errno(ret); | |
85db90e7 | 4925 | return; |
01225596 TM |
4926 | } |
4927 | ||
4928 | /* Remove the old entry. */ | |
4929 | memmove(xs->here, xs->here + 1, | |
4930 | (void *)last - (void *)xs->here); | |
4931 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4932 | le16_add_cpu(&xh->xh_count, -1); | |
4933 | ||
ba937127 | 4934 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
4935 | } |
4936 | ||
4937 | /* | |
4938 | * Set the xattr name/value in the bucket specified in xs. | |
4939 | * | |
4940 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4941 | * we divide the whole process into 3 steps: | |
4942 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4943 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4944 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4945 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4946 | * to free the xattr we allocated in set. | |
4947 | */ | |
4948 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4949 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4950 | struct ocfs2_xattr_search *xs, |
4951 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4952 | { |
5a095611 | 4953 | int ret, local = 1; |
01225596 TM |
4954 | size_t value_len; |
4955 | char *val = (char *)xi->value; | |
4956 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4957 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4958 | strlen(xi->name)); | |
01225596 TM |
4959 | |
4960 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4961 | /* | |
4962 | * We need to truncate the xattr storage first. | |
4963 | * | |
4964 | * If both the old and new value are stored to | |
4965 | * outside block, we only need to truncate | |
4966 | * the storage and then set the value outside. | |
4967 | * | |
4968 | * If the new value should be stored within block, | |
4969 | * we should free all the outside block first and | |
4970 | * the modification to the xattr block will be done | |
4971 | * by following steps. | |
4972 | */ | |
4973 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4974 | value_len = xi->value_len; | |
4975 | else | |
4976 | value_len = 0; | |
4977 | ||
4978 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
4979 | value_len, |
4980 | ctxt); | |
01225596 TM |
4981 | if (ret) |
4982 | goto out; | |
4983 | ||
4984 | if (value_len) | |
4985 | goto set_value_outside; | |
4986 | } | |
4987 | ||
4988 | value_len = xi->value_len; | |
4989 | /* So we have to handle the inside block change now. */ | |
4990 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4991 | /* | |
4992 | * If the new value will be stored outside of block, | |
4993 | * initalize a new empty value root and insert it first. | |
4994 | */ | |
4995 | local = 0; | |
4996 | xi->value = &def_xv; | |
4997 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4998 | } | |
4999 | ||
85db90e7 TM |
5000 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5001 | name_hash, local); | |
01225596 TM |
5002 | if (ret) { |
5003 | mlog_errno(ret); | |
5004 | goto out; | |
5005 | } | |
5006 | ||
5a095611 TM |
5007 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5008 | goto out; | |
01225596 | 5009 | |
5a095611 TM |
5010 | /* allocate the space now for the outside block storage. */ |
5011 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5012 | value_len, ctxt); |
5a095611 TM |
5013 | if (ret) { |
5014 | mlog_errno(ret); | |
5015 | ||
5016 | if (xs->not_found) { | |
5017 | /* | |
5018 | * We can't allocate enough clusters for outside | |
5019 | * storage and we have allocated xattr already, | |
5020 | * so need to remove it. | |
5021 | */ | |
85db90e7 | 5022 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5023 | } |
01225596 TM |
5024 | goto out; |
5025 | } | |
5026 | ||
5027 | set_value_outside: | |
85db90e7 TM |
5028 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5029 | xs, val, value_len); | |
01225596 TM |
5030 | out: |
5031 | return ret; | |
5032 | } | |
5033 | ||
80bcaf34 TM |
5034 | /* |
5035 | * check whether the xattr bucket is filled up with the same hash value. | |
5036 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5037 | * If we want to insert a xattr with different hash value, go ahead | |
5038 | * and ocfs2_divide_xattr_bucket will handle this. | |
5039 | */ | |
01225596 | 5040 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5041 | struct ocfs2_xattr_bucket *bucket, |
5042 | const char *name) | |
01225596 | 5043 | { |
3e632946 | 5044 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5045 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5046 | ||
5047 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5048 | return 0; | |
01225596 TM |
5049 | |
5050 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5051 | xh->xh_entries[0].xe_name_hash) { | |
5052 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5053 | "hash = %u\n", | |
9c7759aa | 5054 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5055 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5056 | return -ENOSPC; | |
5057 | } | |
5058 | ||
5059 | return 0; | |
5060 | } | |
5061 | ||
5062 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5063 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5064 | struct ocfs2_xattr_search *xs, |
5065 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5066 | { |
5067 | struct ocfs2_xattr_header *xh; | |
5068 | struct ocfs2_xattr_entry *xe; | |
5069 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5070 | int free, max_free, need, old; |
01225596 TM |
5071 | size_t value_size = 0, name_len = strlen(xi->name); |
5072 | size_t blocksize = inode->i_sb->s_blocksize; | |
5073 | int ret, allocation = 0; | |
01225596 TM |
5074 | |
5075 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5076 | ||
5077 | try_again: | |
5078 | xh = xs->header; | |
5079 | count = le16_to_cpu(xh->xh_count); | |
5080 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5081 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5082 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5083 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5084 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5085 | |
5086 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5087 | "of %u which exceed block size\n", | |
ba937127 | 5088 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5089 | header_size); |
5090 | ||
5091 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5092 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5093 | else if (xi->value) | |
5094 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5095 | ||
5096 | if (xs->not_found) | |
5097 | need = sizeof(struct ocfs2_xattr_entry) + | |
5098 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5099 | else { | |
5100 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5101 | ||
5102 | /* | |
5103 | * We only replace the old value if the new length is smaller | |
5104 | * than the old one. Otherwise we will allocate new space in the | |
5105 | * bucket to store it. | |
5106 | */ | |
5107 | xe = xs->here; | |
5108 | if (ocfs2_xattr_is_local(xe)) | |
5109 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5110 | else | |
5111 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5112 | ||
5113 | if (old >= value_size) | |
5114 | need = 0; | |
5115 | } | |
5116 | ||
4442f518 | 5117 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5118 | /* |
5119 | * We need to make sure the new name/value pair | |
5120 | * can exist in the same block. | |
5121 | */ | |
5122 | if (xh_free_start % blocksize < need) | |
5123 | free -= xh_free_start % blocksize; | |
5124 | ||
5125 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5126 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5127 | " %u\n", xs->not_found, | |
ba937127 | 5128 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5129 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5130 | le16_to_cpu(xh->xh_name_value_len)); | |
5131 | ||
976331d8 TM |
5132 | if (free < need || |
5133 | (xs->not_found && | |
5134 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5135 | if (need <= max_free && |
5136 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5137 | /* | |
5138 | * We can create the space by defragment. Since only the | |
5139 | * name/value will be moved, the xe shouldn't be changed | |
5140 | * in xs. | |
5141 | */ | |
85db90e7 TM |
5142 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5143 | xs->bucket); | |
01225596 TM |
5144 | if (ret) { |
5145 | mlog_errno(ret); | |
5146 | goto out; | |
5147 | } | |
5148 | ||
5149 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5150 | free = xh_free_start - header_size |
5151 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5152 | if (xh_free_start % blocksize < need) |
5153 | free -= xh_free_start % blocksize; | |
5154 | ||
5155 | if (free >= need) | |
5156 | goto xattr_set; | |
5157 | ||
5158 | mlog(0, "Can't get enough space for xattr insert by " | |
5159 | "defragment. Need %u bytes, but we have %d, so " | |
5160 | "allocate new bucket for it.\n", need, free); | |
5161 | } | |
5162 | ||
5163 | /* | |
5164 | * We have to add new buckets or clusters and one | |
5165 | * allocation should leave us enough space for insert. | |
5166 | */ | |
5167 | BUG_ON(allocation); | |
5168 | ||
5169 | /* | |
5170 | * We do not allow for overlapping ranges between buckets. And | |
5171 | * the maximum number of collisions we will allow for then is | |
5172 | * one bucket's worth, so check it here whether we need to | |
5173 | * add a new bucket for the insert. | |
5174 | */ | |
80bcaf34 | 5175 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5176 | xs->bucket, |
80bcaf34 | 5177 | xi->name); |
01225596 TM |
5178 | if (ret) { |
5179 | mlog_errno(ret); | |
5180 | goto out; | |
5181 | } | |
5182 | ||
5183 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5184 | xs->xattr_bh, | |
91f2033f | 5185 | xs->bucket, |
78f30c31 | 5186 | ctxt); |
01225596 TM |
5187 | if (ret) { |
5188 | mlog_errno(ret); | |
5189 | goto out; | |
5190 | } | |
5191 | ||
91f2033f JB |
5192 | /* |
5193 | * ocfs2_add_new_xattr_bucket() will have updated | |
5194 | * xs->bucket if it moved, but it will not have updated | |
5195 | * any of the other search fields. Thus, we drop it and | |
5196 | * re-search. Everything should be cached, so it'll be | |
5197 | * quick. | |
5198 | */ | |
ba937127 | 5199 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5200 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5201 | xi->name_index, | |
5202 | xi->name, xs); | |
5203 | if (ret && ret != -ENODATA) | |
5204 | goto out; | |
5205 | xs->not_found = ret; | |
5206 | allocation = 1; | |
5207 | goto try_again; | |
5208 | } | |
5209 | ||
5210 | xattr_set: | |
78f30c31 | 5211 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5212 | out: |
5213 | mlog_exit(ret); | |
5214 | return ret; | |
5215 | } | |
a3944256 TM |
5216 | |
5217 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5218 | struct ocfs2_xattr_bucket *bucket, | |
5219 | void *para) | |
5220 | { | |
5221 | int ret = 0; | |
3e632946 | 5222 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5223 | u16 i; |
5224 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5225 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5226 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5227 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5228 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
5229 | ||
78f30c31 TM |
5230 | |
5231 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5232 | |
5233 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5234 | xe = &xh->xh_entries[i]; | |
5235 | if (ocfs2_xattr_is_local(xe)) | |
5236 | continue; | |
5237 | ||
88c3b062 TM |
5238 | ctxt.handle = ocfs2_start_trans(osb, credits); |
5239 | if (IS_ERR(ctxt.handle)) { | |
5240 | ret = PTR_ERR(ctxt.handle); | |
5241 | mlog_errno(ret); | |
5242 | break; | |
5243 | } | |
5244 | ||
548b0f22 | 5245 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5246 | i, 0, &ctxt); |
88c3b062 TM |
5247 | |
5248 | ocfs2_commit_trans(osb, ctxt.handle); | |
a3944256 TM |
5249 | if (ret) { |
5250 | mlog_errno(ret); | |
5251 | break; | |
5252 | } | |
5253 | } | |
5254 | ||
78f30c31 TM |
5255 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5256 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5257 | return ret; |
5258 | } | |
5259 | ||
5260 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
5261 | struct buffer_head *xb_bh) | |
5262 | { | |
5263 | struct ocfs2_xattr_block *xb = | |
5264 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5265 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
5266 | int ret = 0; | |
5267 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
5268 | u64 p_blkno; | |
5269 | ||
5270 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
5271 | return 0; | |
5272 | ||
5273 | while (name_hash > 0) { | |
5274 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
5275 | &e_cpos, &num_clusters, el); | |
5276 | if (ret) { | |
5277 | mlog_errno(ret); | |
5278 | goto out; | |
5279 | } | |
5280 | ||
5281 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
5282 | ocfs2_delete_xattr_in_bucket, | |
5283 | NULL); | |
5284 | if (ret) { | |
5285 | mlog_errno(ret); | |
5286 | goto out; | |
5287 | } | |
5288 | ||
5289 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
5290 | p_blkno, e_cpos, num_clusters); | |
5291 | if (ret) { | |
5292 | mlog_errno(ret); | |
5293 | break; | |
5294 | } | |
5295 | ||
5296 | if (e_cpos == 0) | |
5297 | break; | |
5298 | ||
5299 | name_hash = e_cpos - 1; | |
5300 | } | |
5301 | ||
5302 | out: | |
5303 | return ret; | |
5304 | } | |
99219aea | 5305 | |
923f7f31 TY |
5306 | /* |
5307 | * 'security' attributes support | |
5308 | */ | |
5309 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5310 | size_t list_size, const char *name, | |
5311 | size_t name_len) | |
5312 | { | |
5313 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5314 | const size_t total_len = prefix_len + name_len + 1; | |
5315 | ||
5316 | if (list && total_len <= list_size) { | |
5317 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5318 | memcpy(list + prefix_len, name, name_len); | |
5319 | list[prefix_len + name_len] = '\0'; | |
5320 | } | |
5321 | return total_len; | |
5322 | } | |
5323 | ||
5324 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5325 | void *buffer, size_t size) | |
5326 | { | |
5327 | if (strcmp(name, "") == 0) | |
5328 | return -EINVAL; | |
5329 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5330 | buffer, size); | |
5331 | } | |
5332 | ||
5333 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5334 | const void *value, size_t size, int flags) | |
5335 | { | |
5336 | if (strcmp(name, "") == 0) | |
5337 | return -EINVAL; | |
5338 | ||
5339 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5340 | size, flags); | |
5341 | } | |
5342 | ||
534eaddd TY |
5343 | int ocfs2_init_security_get(struct inode *inode, |
5344 | struct inode *dir, | |
5345 | struct ocfs2_security_xattr_info *si) | |
5346 | { | |
38d59ef6 TY |
5347 | /* check whether ocfs2 support feature xattr */ |
5348 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
5349 | return -EOPNOTSUPP; | |
534eaddd TY |
5350 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
5351 | &si->value_len); | |
5352 | } | |
5353 | ||
5354 | int ocfs2_init_security_set(handle_t *handle, | |
5355 | struct inode *inode, | |
5356 | struct buffer_head *di_bh, | |
5357 | struct ocfs2_security_xattr_info *si, | |
5358 | struct ocfs2_alloc_context *xattr_ac, | |
5359 | struct ocfs2_alloc_context *data_ac) | |
5360 | { | |
5361 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5362 | OCFS2_XATTR_INDEX_SECURITY, | |
5363 | si->name, si->value, si->value_len, 0, | |
5364 | xattr_ac, data_ac); | |
5365 | } | |
5366 | ||
923f7f31 TY |
5367 | struct xattr_handler ocfs2_xattr_security_handler = { |
5368 | .prefix = XATTR_SECURITY_PREFIX, | |
5369 | .list = ocfs2_xattr_security_list, | |
5370 | .get = ocfs2_xattr_security_get, | |
5371 | .set = ocfs2_xattr_security_set, | |
5372 | }; | |
5373 | ||
99219aea MF |
5374 | /* |
5375 | * 'trusted' attributes support | |
5376 | */ | |
99219aea MF |
5377 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5378 | size_t list_size, const char *name, | |
5379 | size_t name_len) | |
5380 | { | |
ceb1eba3 | 5381 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5382 | const size_t total_len = prefix_len + name_len + 1; |
5383 | ||
5384 | if (list && total_len <= list_size) { | |
5385 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5386 | memcpy(list + prefix_len, name, name_len); | |
5387 | list[prefix_len + name_len] = '\0'; | |
5388 | } | |
5389 | return total_len; | |
5390 | } | |
5391 | ||
5392 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5393 | void *buffer, size_t size) | |
5394 | { | |
5395 | if (strcmp(name, "") == 0) | |
5396 | return -EINVAL; | |
5397 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5398 | buffer, size); | |
5399 | } | |
5400 | ||
5401 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5402 | const void *value, size_t size, int flags) | |
5403 | { | |
5404 | if (strcmp(name, "") == 0) | |
5405 | return -EINVAL; | |
5406 | ||
5407 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5408 | size, flags); | |
5409 | } | |
5410 | ||
5411 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5412 | .prefix = XATTR_TRUSTED_PREFIX, | |
5413 | .list = ocfs2_xattr_trusted_list, | |
5414 | .get = ocfs2_xattr_trusted_get, | |
5415 | .set = ocfs2_xattr_trusted_set, | |
5416 | }; | |
5417 | ||
99219aea MF |
5418 | /* |
5419 | * 'user' attributes support | |
5420 | */ | |
99219aea MF |
5421 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5422 | size_t list_size, const char *name, | |
5423 | size_t name_len) | |
5424 | { | |
ceb1eba3 | 5425 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5426 | const size_t total_len = prefix_len + name_len + 1; |
5427 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5428 | ||
5429 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5430 | return 0; | |
5431 | ||
5432 | if (list && total_len <= list_size) { | |
5433 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5434 | memcpy(list + prefix_len, name, name_len); | |
5435 | list[prefix_len + name_len] = '\0'; | |
5436 | } | |
5437 | return total_len; | |
5438 | } | |
5439 | ||
5440 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5441 | void *buffer, size_t size) | |
5442 | { | |
5443 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5444 | ||
5445 | if (strcmp(name, "") == 0) | |
5446 | return -EINVAL; | |
5447 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5448 | return -EOPNOTSUPP; | |
5449 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5450 | buffer, size); | |
5451 | } | |
5452 | ||
5453 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5454 | const void *value, size_t size, int flags) | |
5455 | { | |
5456 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5457 | ||
5458 | if (strcmp(name, "") == 0) | |
5459 | return -EINVAL; | |
5460 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5461 | return -EOPNOTSUPP; | |
5462 | ||
5463 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5464 | size, flags); | |
5465 | } | |
5466 | ||
5467 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5468 | .prefix = XATTR_USER_PREFIX, | |
5469 | .list = ocfs2_xattr_user_list, | |
5470 | .get = ocfs2_xattr_user_get, | |
5471 | .set = ocfs2_xattr_user_set, | |
5472 | }; |