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f56654c4 TM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * xattr.c | |
5 | * | |
c3cb6827 | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 7 | * |
cf1d6c76 | 8 | * CREDITS: |
c3cb6827 TY |
9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
cf1d6c76 | 11 | * |
f56654c4 TM |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public | |
c3cb6827 | 14 | * License version 2 as published by the Free Software Foundation. |
f56654c4 TM |
15 | * |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
f56654c4 TM |
20 | */ |
21 | ||
cf1d6c76 TY |
22 | #include <linux/capability.h> |
23 | #include <linux/fs.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/pagemap.h> | |
28 | #include <linux/uio.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/splice.h> | |
31 | #include <linux/mount.h> | |
32 | #include <linux/writeback.h> | |
33 | #include <linux/falloc.h> | |
01225596 | 34 | #include <linux/sort.h> |
99219aea MF |
35 | #include <linux/init.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
923f7f31 | 38 | #include <linux/security.h> |
cf1d6c76 | 39 | |
f56654c4 TM |
40 | #define MLOG_MASK_PREFIX ML_XATTR |
41 | #include <cluster/masklog.h> | |
42 | ||
43 | #include "ocfs2.h" | |
44 | #include "alloc.h" | |
d6b32bbb | 45 | #include "blockcheck.h" |
f56654c4 TM |
46 | #include "dlmglue.h" |
47 | #include "file.h" | |
cf1d6c76 TY |
48 | #include "symlink.h" |
49 | #include "sysfile.h" | |
f56654c4 TM |
50 | #include "inode.h" |
51 | #include "journal.h" | |
52 | #include "ocfs2_fs.h" | |
53 | #include "suballoc.h" | |
54 | #include "uptodate.h" | |
55 | #include "buffer_head_io.h" | |
0c044f0b | 56 | #include "super.h" |
cf1d6c76 | 57 | #include "xattr.h" |
492a8a33 | 58 | #include "refcounttree.h" |
0fe9b66c | 59 | #include "acl.h" |
cf1d6c76 TY |
60 | |
61 | struct ocfs2_xattr_def_value_root { | |
62 | struct ocfs2_xattr_value_root xv; | |
63 | struct ocfs2_extent_rec er; | |
64 | }; | |
65 | ||
0c044f0b | 66 | struct ocfs2_xattr_bucket { |
ba937127 JB |
67 | /* The inode these xattrs are associated with */ |
68 | struct inode *bu_inode; | |
69 | ||
70 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 71 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
72 | |
73 | /* How many blocks make up one bucket for this filesystem */ | |
74 | int bu_blocks; | |
0c044f0b TM |
75 | }; |
76 | ||
78f30c31 | 77 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 78 | handle_t *handle; |
78f30c31 TM |
79 | struct ocfs2_alloc_context *meta_ac; |
80 | struct ocfs2_alloc_context *data_ac; | |
81 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
82 | }; | |
83 | ||
cf1d6c76 TY |
84 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
85 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 86 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
87 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
88 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 89 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
90 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
91 | - sizeof(struct ocfs2_xattr_block) \ | |
92 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 93 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
94 | |
95 | static struct ocfs2_xattr_def_value_root def_xv = { | |
96 | .xv.xr_list.l_count = cpu_to_le16(1), | |
97 | }; | |
98 | ||
99 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
100 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
101 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
102 | &ocfs2_xattr_acl_access_handler, | |
103 | &ocfs2_xattr_acl_default_handler, | |
104 | #endif | |
cf1d6c76 | 105 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 106 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
107 | NULL |
108 | }; | |
109 | ||
c988fd04 | 110 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 111 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
112 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
113 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] | |
114 | = &ocfs2_xattr_acl_access_handler, | |
115 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
116 | = &ocfs2_xattr_acl_default_handler, | |
117 | #endif | |
cf1d6c76 | 118 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 119 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
120 | }; |
121 | ||
122 | struct ocfs2_xattr_info { | |
123 | int name_index; | |
124 | const char *name; | |
125 | const void *value; | |
126 | size_t value_len; | |
127 | }; | |
128 | ||
129 | struct ocfs2_xattr_search { | |
130 | struct buffer_head *inode_bh; | |
131 | /* | |
132 | * xattr_bh point to the block buffer head which has extended attribute | |
133 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
134 | */ | |
135 | struct buffer_head *xattr_bh; | |
136 | struct ocfs2_xattr_header *header; | |
ba937127 | 137 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
138 | void *base; |
139 | void *end; | |
140 | struct ocfs2_xattr_entry *here; | |
141 | int not_found; | |
142 | }; | |
143 | ||
fd68a894 | 144 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
145 | struct ocfs2_xattr_header *xh, |
146 | int index, | |
147 | int *block_off, | |
148 | int *new_offset); | |
149 | ||
54f443f4 JB |
150 | static int ocfs2_xattr_block_find(struct inode *inode, |
151 | int name_index, | |
152 | const char *name, | |
153 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
154 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
155 | struct buffer_head *root_bh, | |
156 | int name_index, | |
157 | const char *name, | |
158 | struct ocfs2_xattr_search *xs); | |
159 | ||
0c044f0b | 160 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 161 | struct buffer_head *blk_bh, |
0c044f0b TM |
162 | char *buffer, |
163 | size_t buffer_size); | |
164 | ||
01225596 | 165 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
166 | struct ocfs2_xattr_search *xs, |
167 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
168 | |
169 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
170 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
171 | struct ocfs2_xattr_search *xs, |
172 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 173 | |
47bca495 TM |
174 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
175 | struct buffer_head *root_bh, | |
176 | u64 blkno, u32 cpos, u32 len, void *para); | |
177 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
178 | struct buffer_head *root_bh, | |
179 | xattr_tree_rec_func *rec_func, | |
180 | void *para); | |
181 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
182 | struct ocfs2_xattr_bucket *bucket, | |
183 | void *para); | |
184 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
185 | struct buffer_head *root_bh, | |
186 | u64 blkno, | |
187 | u32 cpos, | |
188 | u32 len, | |
189 | void *para); | |
190 | ||
c58b6032 JB |
191 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
192 | u64 src_blk, u64 last_blk, u64 to_blk, | |
193 | unsigned int start_bucket, | |
194 | u32 *first_hash); | |
492a8a33 TM |
195 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
196 | struct ocfs2_dinode *di, | |
197 | struct ocfs2_xattr_info *xi, | |
198 | struct ocfs2_xattr_search *xis, | |
199 | struct ocfs2_xattr_search *xbs, | |
200 | struct ocfs2_refcount_tree **ref_tree, | |
201 | int *meta_need, | |
202 | int *credits); | |
ce9c5a54 TM |
203 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
204 | struct ocfs2_xattr_bucket *bucket, | |
205 | int offset, | |
206 | struct ocfs2_xattr_value_root **xv, | |
207 | struct buffer_head **bh); | |
0fe9b66c TM |
208 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, |
209 | const void *value, size_t size, int flags); | |
a3944256 | 210 | |
0030e001 TY |
211 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
212 | { | |
213 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
214 | } | |
215 | ||
216 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
217 | { | |
218 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
219 | } | |
220 | ||
221 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
222 | { | |
223 | u16 len = sb->s_blocksize - | |
224 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
225 | ||
226 | return len / sizeof(struct ocfs2_xattr_entry); | |
227 | } | |
228 | ||
9c7759aa | 229 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 230 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 231 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 232 | |
ba937127 | 233 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 234 | { |
ba937127 JB |
235 | struct ocfs2_xattr_bucket *bucket; |
236 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 237 | |
ba937127 JB |
238 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
239 | ||
240 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
241 | if (bucket) { | |
242 | bucket->bu_inode = inode; | |
243 | bucket->bu_blocks = blks; | |
244 | } | |
245 | ||
246 | return bucket; | |
247 | } | |
248 | ||
249 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
250 | { | |
251 | int i; | |
252 | ||
253 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
254 | brelse(bucket->bu_bhs[i]); |
255 | bucket->bu_bhs[i] = NULL; | |
256 | } | |
257 | } | |
258 | ||
ba937127 JB |
259 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
260 | { | |
261 | if (bucket) { | |
262 | ocfs2_xattr_bucket_relse(bucket); | |
263 | bucket->bu_inode = NULL; | |
264 | kfree(bucket); | |
265 | } | |
266 | } | |
267 | ||
784b816a JB |
268 | /* |
269 | * A bucket that has never been written to disk doesn't need to be | |
270 | * read. We just need the buffer_heads. Don't call this for | |
271 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
272 | * them fully. | |
273 | */ | |
ba937127 | 274 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
275 | u64 xb_blkno) |
276 | { | |
277 | int i, rc = 0; | |
784b816a | 278 | |
ba937127 JB |
279 | for (i = 0; i < bucket->bu_blocks; i++) { |
280 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
281 | xb_blkno + i); | |
784b816a JB |
282 | if (!bucket->bu_bhs[i]) { |
283 | rc = -EIO; | |
284 | mlog_errno(rc); | |
285 | break; | |
286 | } | |
287 | ||
8cb471e8 | 288 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 289 | bucket->bu_bhs[i])) |
8cb471e8 | 290 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 291 | bucket->bu_bhs[i]); |
784b816a JB |
292 | } |
293 | ||
294 | if (rc) | |
ba937127 | 295 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
296 | return rc; |
297 | } | |
298 | ||
299 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 300 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
301 | u64 xb_blkno) |
302 | { | |
ba937127 | 303 | int rc; |
784b816a | 304 | |
8cb471e8 | 305 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
306 | bucket->bu_blocks, bucket->bu_bhs, 0, |
307 | NULL); | |
4d0e214e | 308 | if (!rc) { |
c8b9cf9a | 309 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
310 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
311 | bucket->bu_bhs, | |
312 | bucket->bu_blocks, | |
313 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 314 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
315 | if (rc) |
316 | mlog_errno(rc); | |
317 | } | |
318 | ||
784b816a | 319 | if (rc) |
ba937127 | 320 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
321 | return rc; |
322 | } | |
323 | ||
1224be02 | 324 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
325 | struct ocfs2_xattr_bucket *bucket, |
326 | int type) | |
327 | { | |
328 | int i, rc = 0; | |
1224be02 | 329 | |
ba937127 | 330 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
331 | rc = ocfs2_journal_access(handle, |
332 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
333 | bucket->bu_bhs[i], type); |
334 | if (rc) { | |
335 | mlog_errno(rc); | |
336 | break; | |
337 | } | |
338 | } | |
339 | ||
340 | return rc; | |
341 | } | |
342 | ||
343 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
344 | struct ocfs2_xattr_bucket *bucket) |
345 | { | |
ba937127 | 346 | int i; |
1224be02 | 347 | |
c8b9cf9a | 348 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
349 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
350 | bucket->bu_bhs, bucket->bu_blocks, | |
351 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 352 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 353 | |
ba937127 | 354 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
355 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
356 | } | |
357 | ||
ba937127 | 358 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
359 | struct ocfs2_xattr_bucket *src) |
360 | { | |
361 | int i; | |
ba937127 JB |
362 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
363 | ||
364 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
365 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 366 | |
ba937127 | 367 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
368 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
369 | blocksize); | |
370 | } | |
371 | } | |
1224be02 | 372 | |
4ae1d69b JB |
373 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
374 | struct buffer_head *bh) | |
375 | { | |
d6b32bbb | 376 | int rc; |
4ae1d69b JB |
377 | struct ocfs2_xattr_block *xb = |
378 | (struct ocfs2_xattr_block *)bh->b_data; | |
379 | ||
380 | mlog(0, "Validating xattr block %llu\n", | |
381 | (unsigned long long)bh->b_blocknr); | |
382 | ||
d6b32bbb JB |
383 | BUG_ON(!buffer_uptodate(bh)); |
384 | ||
385 | /* | |
386 | * If the ecc fails, we return the error but otherwise | |
387 | * leave the filesystem running. We know any error is | |
388 | * local to this block. | |
389 | */ | |
390 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
391 | if (rc) | |
392 | return rc; | |
393 | ||
394 | /* | |
395 | * Errors after here are fatal | |
396 | */ | |
397 | ||
4ae1d69b JB |
398 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
399 | ocfs2_error(sb, | |
400 | "Extended attribute block #%llu has bad " | |
401 | "signature %.*s", | |
402 | (unsigned long long)bh->b_blocknr, 7, | |
403 | xb->xb_signature); | |
404 | return -EINVAL; | |
405 | } | |
406 | ||
407 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
408 | ocfs2_error(sb, | |
409 | "Extended attribute block #%llu has an " | |
410 | "invalid xb_blkno of %llu", | |
411 | (unsigned long long)bh->b_blocknr, | |
412 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
417 | ocfs2_error(sb, | |
418 | "Extended attribute block #%llu has an invalid " | |
419 | "xb_fs_generation of #%u", | |
420 | (unsigned long long)bh->b_blocknr, | |
421 | le32_to_cpu(xb->xb_fs_generation)); | |
422 | return -EINVAL; | |
423 | } | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
429 | struct buffer_head **bh) | |
430 | { | |
431 | int rc; | |
432 | struct buffer_head *tmp = *bh; | |
433 | ||
8cb471e8 | 434 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 435 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
436 | |
437 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
438 | if (!rc && !*bh) | |
439 | *bh = tmp; | |
440 | ||
441 | return rc; | |
442 | } | |
443 | ||
936b8834 | 444 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
445 | { |
446 | struct xattr_handler *handler = NULL; | |
447 | ||
448 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
449 | handler = ocfs2_xattr_handler_map[name_index]; | |
450 | ||
936b8834 | 451 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
452 | } |
453 | ||
40daa16a | 454 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 455 | const char *name, |
40daa16a | 456 | int name_len) |
cf1d6c76 TY |
457 | { |
458 | /* Get hash value of uuid from super block */ | |
459 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
460 | int i; | |
461 | ||
cf1d6c76 TY |
462 | /* hash extended attribute name */ |
463 | for (i = 0; i < name_len; i++) { | |
464 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
465 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
466 | *name++; | |
467 | } | |
468 | ||
469 | return hash; | |
470 | } | |
471 | ||
472 | /* | |
473 | * ocfs2_xattr_hash_entry() | |
474 | * | |
475 | * Compute the hash of an extended attribute. | |
476 | */ | |
477 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
478 | struct ocfs2_xattr_header *header, | |
479 | struct ocfs2_xattr_entry *entry) | |
480 | { | |
481 | u32 hash = 0; | |
cf1d6c76 | 482 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 483 | |
2057e5c6 | 484 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
485 | entry->xe_name_hash = cpu_to_le32(hash); |
486 | ||
487 | return; | |
488 | } | |
f56654c4 | 489 | |
534eaddd TY |
490 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
491 | { | |
492 | int size = 0; | |
493 | ||
494 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
495 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
496 | else | |
497 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
498 | size += sizeof(struct ocfs2_xattr_entry); | |
499 | ||
500 | return size; | |
501 | } | |
502 | ||
503 | int ocfs2_calc_security_init(struct inode *dir, | |
504 | struct ocfs2_security_xattr_info *si, | |
505 | int *want_clusters, | |
506 | int *xattr_credits, | |
507 | struct ocfs2_alloc_context **xattr_ac) | |
508 | { | |
509 | int ret = 0; | |
510 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
511 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
512 | si->value_len); | |
513 | ||
514 | /* | |
515 | * The max space of security xattr taken inline is | |
516 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
517 | * So reserve one metadata block for it is ok. | |
518 | */ | |
519 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
520 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
521 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
522 | if (ret) { | |
523 | mlog_errno(ret); | |
524 | return ret; | |
525 | } | |
526 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
527 | } | |
528 | ||
529 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
530 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
531 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
532 | si->value_len); | |
533 | ||
534 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
535 | new_clusters); | |
536 | *want_clusters += new_clusters; | |
537 | } | |
534eaddd TY |
538 | return ret; |
539 | } | |
540 | ||
89c38bd0 TY |
541 | int ocfs2_calc_xattr_init(struct inode *dir, |
542 | struct buffer_head *dir_bh, | |
543 | int mode, | |
544 | struct ocfs2_security_xattr_info *si, | |
545 | int *want_clusters, | |
546 | int *xattr_credits, | |
9b7895ef | 547 | int *want_meta) |
89c38bd0 TY |
548 | { |
549 | int ret = 0; | |
550 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 551 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
552 | |
553 | if (si->enable) | |
554 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
555 | si->value_len); | |
556 | ||
557 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
558 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
559 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
560 | "", NULL, 0); | |
561 | if (acl_len > 0) { | |
562 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
563 | if (S_ISDIR(mode)) | |
564 | a_size <<= 1; | |
565 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
566 | mlog_errno(ret); | |
567 | return ret; | |
568 | } | |
569 | } | |
570 | ||
571 | if (!(s_size + a_size)) | |
572 | return ret; | |
573 | ||
574 | /* | |
575 | * The max space of security xattr taken inline is | |
576 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
577 | * The max space of acl xattr taken inline is | |
578 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
579 | * when blocksize = 512, may reserve one more cluser for | |
580 | * xattr bucket, otherwise reserve one metadata block | |
581 | * for them is ok. | |
6c9fd1dc TY |
582 | * If this is a new directory with inline data, |
583 | * we choose to reserve the entire inline area for | |
584 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
585 | */ |
586 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 587 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 588 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 589 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
590 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
591 | } | |
592 | ||
593 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
594 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
595 | *want_clusters += 1; | |
596 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
597 | } | |
598 | ||
0e445b6f TY |
599 | /* |
600 | * reserve credits and clusters for xattrs which has large value | |
601 | * and have to be set outside | |
602 | */ | |
603 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
604 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
605 | si->value_len); | |
606 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
607 | new_clusters); | |
608 | *want_clusters += new_clusters; | |
609 | } | |
89c38bd0 TY |
610 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
611 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
612 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
613 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
614 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
615 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
616 | new_clusters); | |
617 | *want_clusters += new_clusters; | |
89c38bd0 TY |
618 | } |
619 | ||
620 | return ret; | |
621 | } | |
622 | ||
f56654c4 TM |
623 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
624 | u32 clusters_to_add, | |
19b801f4 | 625 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 626 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
627 | { |
628 | int status = 0; | |
85db90e7 | 629 | handle_t *handle = ctxt->handle; |
f56654c4 | 630 | enum ocfs2_alloc_restarted why; |
19b801f4 | 631 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 632 | struct ocfs2_extent_tree et; |
f56654c4 TM |
633 | |
634 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
635 | ||
5e404e9e | 636 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 637 | |
0cf2f763 | 638 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 639 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
640 | if (status < 0) { |
641 | mlog_errno(status); | |
642 | goto leave; | |
643 | } | |
644 | ||
19b801f4 | 645 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
cbee7e1a JB |
646 | status = ocfs2_add_clusters_in_btree(handle, |
647 | &et, | |
f56654c4 TM |
648 | &logical_start, |
649 | clusters_to_add, | |
650 | 0, | |
78f30c31 TM |
651 | ctxt->data_ac, |
652 | ctxt->meta_ac, | |
f99b9b7c | 653 | &why); |
85db90e7 TM |
654 | if (status < 0) { |
655 | mlog_errno(status); | |
f56654c4 TM |
656 | goto leave; |
657 | } | |
658 | ||
19b801f4 | 659 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
660 | if (status < 0) { |
661 | mlog_errno(status); | |
662 | goto leave; | |
663 | } | |
664 | ||
19b801f4 | 665 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 666 | |
85db90e7 TM |
667 | /* |
668 | * We should have already allocated enough space before the transaction, | |
669 | * so no need to restart. | |
670 | */ | |
671 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
672 | |
673 | leave: | |
f56654c4 TM |
674 | |
675 | return status; | |
676 | } | |
677 | ||
678 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 679 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 680 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 681 | unsigned int ext_flags, |
78f30c31 | 682 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
683 | { |
684 | int ret; | |
685 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 686 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
687 | struct ocfs2_extent_tree et; |
688 | ||
5e404e9e | 689 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 690 | |
0cf2f763 | 691 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 692 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
693 | if (ret) { |
694 | mlog_errno(ret); | |
85db90e7 | 695 | goto out; |
f56654c4 TM |
696 | } |
697 | ||
dbdcf6a4 | 698 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 699 | &ctxt->dealloc); |
f56654c4 TM |
700 | if (ret) { |
701 | mlog_errno(ret); | |
85db90e7 | 702 | goto out; |
f56654c4 TM |
703 | } |
704 | ||
d72cc72d | 705 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 706 | |
d72cc72d | 707 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
708 | if (ret) { |
709 | mlog_errno(ret); | |
85db90e7 | 710 | goto out; |
f56654c4 TM |
711 | } |
712 | ||
492a8a33 TM |
713 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
714 | ret = ocfs2_decrease_refcount(inode, handle, | |
715 | ocfs2_blocks_to_clusters(inode->i_sb, | |
716 | phys_blkno), | |
717 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
718 | else | |
719 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
720 | phys_blkno, len); | |
f56654c4 TM |
721 | if (ret) |
722 | mlog_errno(ret); | |
723 | ||
f56654c4 | 724 | out: |
f56654c4 TM |
725 | return ret; |
726 | } | |
727 | ||
728 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
729 | u32 old_clusters, | |
730 | u32 new_clusters, | |
19b801f4 | 731 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 732 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
733 | { |
734 | int ret = 0; | |
492a8a33 | 735 | unsigned int ext_flags; |
f56654c4 TM |
736 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
737 | u64 block; | |
f56654c4 TM |
738 | |
739 | if (old_clusters <= new_clusters) | |
740 | return 0; | |
741 | ||
742 | cpos = new_clusters; | |
743 | trunc_len = old_clusters - new_clusters; | |
744 | while (trunc_len) { | |
745 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 746 | &alloc_size, |
492a8a33 | 747 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
748 | if (ret) { |
749 | mlog_errno(ret); | |
750 | goto out; | |
751 | } | |
752 | ||
753 | if (alloc_size > trunc_len) | |
754 | alloc_size = trunc_len; | |
755 | ||
19b801f4 | 756 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 757 | phys_cpos, alloc_size, |
492a8a33 | 758 | ext_flags, ctxt); |
f56654c4 TM |
759 | if (ret) { |
760 | mlog_errno(ret); | |
761 | goto out; | |
762 | } | |
763 | ||
764 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
765 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
766 | block, alloc_size); | |
f56654c4 TM |
767 | cpos += alloc_size; |
768 | trunc_len -= alloc_size; | |
769 | } | |
770 | ||
771 | out: | |
f56654c4 TM |
772 | return ret; |
773 | } | |
774 | ||
775 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 776 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
777 | int len, |
778 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
779 | { |
780 | int ret; | |
781 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 782 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
783 | |
784 | if (new_clusters == old_clusters) | |
785 | return 0; | |
786 | ||
787 | if (new_clusters > old_clusters) | |
788 | ret = ocfs2_xattr_extend_allocation(inode, | |
789 | new_clusters - old_clusters, | |
b3e5d379 | 790 | vb, ctxt); |
f56654c4 TM |
791 | else |
792 | ret = ocfs2_xattr_shrink_size(inode, | |
793 | old_clusters, new_clusters, | |
b3e5d379 | 794 | vb, ctxt); |
f56654c4 TM |
795 | |
796 | return ret; | |
797 | } | |
cf1d6c76 | 798 | |
936b8834 TM |
799 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
800 | size_t *result, const char *prefix, | |
801 | const char *name, int name_len) | |
802 | { | |
803 | char *p = buffer + *result; | |
804 | int prefix_len = strlen(prefix); | |
805 | int total_len = prefix_len + name_len + 1; | |
806 | ||
807 | *result += total_len; | |
808 | ||
809 | /* we are just looking for how big our buffer needs to be */ | |
810 | if (!size) | |
811 | return 0; | |
812 | ||
813 | if (*result > size) | |
814 | return -ERANGE; | |
815 | ||
816 | memcpy(p, prefix, prefix_len); | |
817 | memcpy(p + prefix_len, name, name_len); | |
818 | p[prefix_len + name_len] = '\0'; | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
cf1d6c76 TY |
823 | static int ocfs2_xattr_list_entries(struct inode *inode, |
824 | struct ocfs2_xattr_header *header, | |
825 | char *buffer, size_t buffer_size) | |
826 | { | |
936b8834 TM |
827 | size_t result = 0; |
828 | int i, type, ret; | |
829 | const char *prefix, *name; | |
cf1d6c76 TY |
830 | |
831 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
832 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
833 | type = ocfs2_xattr_get_type(entry); |
834 | prefix = ocfs2_xattr_prefix(type); | |
835 | ||
836 | if (prefix) { | |
837 | name = (const char *)header + | |
838 | le16_to_cpu(entry->xe_name_offset); | |
839 | ||
840 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
841 | &result, prefix, name, | |
842 | entry->xe_name_len); | |
843 | if (ret) | |
844 | return ret; | |
cf1d6c76 TY |
845 | } |
846 | } | |
847 | ||
936b8834 | 848 | return result; |
cf1d6c76 TY |
849 | } |
850 | ||
8b2c0dba TM |
851 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
852 | struct ocfs2_dinode *di) | |
853 | { | |
854 | struct ocfs2_xattr_header *xh; | |
855 | int i; | |
856 | ||
857 | xh = (struct ocfs2_xattr_header *) | |
858 | ((void *)di + inode->i_sb->s_blocksize - | |
859 | le16_to_cpu(di->i_xattr_inline_size)); | |
860 | ||
861 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
862 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
863 | return 1; | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
cf1d6c76 TY |
868 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
869 | struct ocfs2_dinode *di, | |
870 | char *buffer, | |
871 | size_t buffer_size) | |
872 | { | |
873 | struct ocfs2_xattr_header *header = NULL; | |
874 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
875 | int ret = 0; | |
876 | ||
877 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
878 | return ret; | |
879 | ||
880 | header = (struct ocfs2_xattr_header *) | |
881 | ((void *)di + inode->i_sb->s_blocksize - | |
882 | le16_to_cpu(di->i_xattr_inline_size)); | |
883 | ||
884 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
885 | ||
886 | return ret; | |
887 | } | |
888 | ||
889 | static int ocfs2_xattr_block_list(struct inode *inode, | |
890 | struct ocfs2_dinode *di, | |
891 | char *buffer, | |
892 | size_t buffer_size) | |
893 | { | |
894 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 895 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
896 | int ret = 0; |
897 | ||
898 | if (!di->i_xattr_loc) | |
899 | return ret; | |
900 | ||
4ae1d69b JB |
901 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
902 | &blk_bh); | |
cf1d6c76 TY |
903 | if (ret < 0) { |
904 | mlog_errno(ret); | |
905 | return ret; | |
906 | } | |
cf1d6c76 | 907 | |
0c044f0b | 908 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
909 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
910 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
911 | ret = ocfs2_xattr_list_entries(inode, header, | |
912 | buffer, buffer_size); | |
47bca495 TM |
913 | } else |
914 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 915 | buffer, buffer_size); |
4ae1d69b | 916 | |
cf1d6c76 TY |
917 | brelse(blk_bh); |
918 | ||
919 | return ret; | |
920 | } | |
921 | ||
922 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
923 | char *buffer, | |
924 | size_t size) | |
925 | { | |
926 | int ret = 0, i_ret = 0, b_ret = 0; | |
927 | struct buffer_head *di_bh = NULL; | |
928 | struct ocfs2_dinode *di = NULL; | |
929 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
930 | ||
8154da3d TY |
931 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
932 | return -EOPNOTSUPP; | |
933 | ||
cf1d6c76 TY |
934 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
935 | return ret; | |
936 | ||
937 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
938 | if (ret < 0) { | |
939 | mlog_errno(ret); | |
940 | return ret; | |
941 | } | |
942 | ||
943 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
944 | ||
945 | down_read(&oi->ip_xattr_sem); | |
946 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
947 | if (i_ret < 0) | |
948 | b_ret = 0; | |
949 | else { | |
950 | if (buffer) { | |
951 | buffer += i_ret; | |
952 | size -= i_ret; | |
953 | } | |
954 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
955 | buffer, size); | |
956 | if (b_ret < 0) | |
957 | i_ret = 0; | |
958 | } | |
959 | up_read(&oi->ip_xattr_sem); | |
960 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
961 | ||
962 | brelse(di_bh); | |
963 | ||
964 | return i_ret + b_ret; | |
965 | } | |
966 | ||
967 | static int ocfs2_xattr_find_entry(int name_index, | |
968 | const char *name, | |
969 | struct ocfs2_xattr_search *xs) | |
970 | { | |
971 | struct ocfs2_xattr_entry *entry; | |
972 | size_t name_len; | |
973 | int i, cmp = 1; | |
974 | ||
975 | if (name == NULL) | |
976 | return -EINVAL; | |
977 | ||
978 | name_len = strlen(name); | |
979 | entry = xs->here; | |
980 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
981 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
982 | if (!cmp) | |
983 | cmp = name_len - entry->xe_name_len; | |
984 | if (!cmp) | |
985 | cmp = memcmp(name, (xs->base + | |
986 | le16_to_cpu(entry->xe_name_offset)), | |
987 | name_len); | |
988 | if (cmp == 0) | |
989 | break; | |
990 | entry += 1; | |
991 | } | |
992 | xs->here = entry; | |
993 | ||
994 | return cmp ? -ENODATA : 0; | |
995 | } | |
996 | ||
997 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 998 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
999 | void *buffer, |
1000 | size_t len) | |
1001 | { | |
1002 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1003 | u64 blkno; | |
1004 | int i, ret = 0; | |
1005 | size_t cplen, blocksize; | |
1006 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1007 | struct ocfs2_extent_list *el; |
1008 | ||
cf1d6c76 TY |
1009 | el = &xv->xr_list; |
1010 | clusters = le32_to_cpu(xv->xr_clusters); | |
1011 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1012 | blocksize = inode->i_sb->s_blocksize; | |
1013 | ||
1014 | cpos = 0; | |
1015 | while (cpos < clusters) { | |
1016 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1017 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1018 | if (ret) { |
1019 | mlog_errno(ret); | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1024 | /* Copy ocfs2_xattr_value */ | |
1025 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1026 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1027 | &bh, NULL); | |
cf1d6c76 TY |
1028 | if (ret) { |
1029 | mlog_errno(ret); | |
1030 | goto out; | |
1031 | } | |
1032 | ||
1033 | cplen = len >= blocksize ? blocksize : len; | |
1034 | memcpy(buffer, bh->b_data, cplen); | |
1035 | len -= cplen; | |
1036 | buffer += cplen; | |
1037 | ||
1038 | brelse(bh); | |
1039 | bh = NULL; | |
1040 | if (len == 0) | |
1041 | break; | |
1042 | } | |
1043 | cpos += num_clusters; | |
1044 | } | |
1045 | out: | |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1050 | int name_index, | |
1051 | const char *name, | |
1052 | void *buffer, | |
1053 | size_t buffer_size, | |
1054 | struct ocfs2_xattr_search *xs) | |
1055 | { | |
1056 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1057 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1058 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1059 | size_t size; |
1060 | int ret = 0; | |
1061 | ||
1062 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1063 | return -ENODATA; | |
1064 | ||
1065 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1066 | xs->header = (struct ocfs2_xattr_header *) | |
1067 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1068 | xs->base = (void *)xs->header; | |
1069 | xs->here = xs->header->xh_entries; | |
1070 | ||
1071 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1072 | if (ret) | |
1073 | return ret; | |
1074 | size = le64_to_cpu(xs->here->xe_value_size); | |
1075 | if (buffer) { | |
1076 | if (size > buffer_size) | |
1077 | return -ERANGE; | |
1078 | if (ocfs2_xattr_is_local(xs->here)) { | |
1079 | memcpy(buffer, (void *)xs->base + | |
1080 | le16_to_cpu(xs->here->xe_name_offset) + | |
1081 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1082 | } else { | |
589dc260 TM |
1083 | xv = (struct ocfs2_xattr_value_root *) |
1084 | (xs->base + le16_to_cpu( | |
1085 | xs->here->xe_name_offset) + | |
1086 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1087 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1088 | buffer, size); |
1089 | if (ret < 0) { | |
1090 | mlog_errno(ret); | |
1091 | return ret; | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | return size; | |
1097 | } | |
1098 | ||
1099 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1100 | int name_index, | |
1101 | const char *name, | |
1102 | void *buffer, | |
1103 | size_t buffer_size, | |
1104 | struct ocfs2_xattr_search *xs) | |
1105 | { | |
cf1d6c76 | 1106 | struct ocfs2_xattr_block *xb; |
589dc260 | 1107 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1108 | size_t size; |
44d8e4e1 SM |
1109 | int ret = -ENODATA, name_offset, name_len, i; |
1110 | int uninitialized_var(block_off); | |
cf1d6c76 | 1111 | |
ba937127 JB |
1112 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1113 | if (!xs->bucket) { | |
1114 | ret = -ENOMEM; | |
1115 | mlog_errno(ret); | |
1116 | goto cleanup; | |
1117 | } | |
589dc260 | 1118 | |
54f443f4 JB |
1119 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1120 | if (ret) { | |
cf1d6c76 | 1121 | mlog_errno(ret); |
cf1d6c76 TY |
1122 | goto cleanup; |
1123 | } | |
1124 | ||
6c1e183e TY |
1125 | if (xs->not_found) { |
1126 | ret = -ENODATA; | |
1127 | goto cleanup; | |
1128 | } | |
1129 | ||
54f443f4 | 1130 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1131 | size = le64_to_cpu(xs->here->xe_value_size); |
1132 | if (buffer) { | |
1133 | ret = -ERANGE; | |
1134 | if (size > buffer_size) | |
1135 | goto cleanup; | |
589dc260 TM |
1136 | |
1137 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1138 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1139 | i = xs->here - xs->header->xh_entries; | |
1140 | ||
1141 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1142 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1143 | bucket_xh(xs->bucket), |
589dc260 TM |
1144 | i, |
1145 | &block_off, | |
1146 | &name_offset); | |
ba937127 | 1147 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1148 | } |
cf1d6c76 TY |
1149 | if (ocfs2_xattr_is_local(xs->here)) { |
1150 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1151 | name_offset + name_len, size); |
cf1d6c76 | 1152 | } else { |
589dc260 TM |
1153 | xv = (struct ocfs2_xattr_value_root *) |
1154 | (xs->base + name_offset + name_len); | |
1155 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1156 | buffer, size); |
1157 | if (ret < 0) { | |
1158 | mlog_errno(ret); | |
1159 | goto cleanup; | |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | ret = size; | |
1164 | cleanup: | |
ba937127 | 1165 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1166 | |
54f443f4 JB |
1167 | brelse(xs->xattr_bh); |
1168 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1169 | return ret; |
1170 | } | |
1171 | ||
4e3e9d02 TY |
1172 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1173 | struct buffer_head *di_bh, | |
0030e001 TY |
1174 | int name_index, |
1175 | const char *name, | |
1176 | void *buffer, | |
1177 | size_t buffer_size) | |
cf1d6c76 TY |
1178 | { |
1179 | int ret; | |
1180 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1181 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1182 | struct ocfs2_xattr_search xis = { | |
1183 | .not_found = -ENODATA, | |
1184 | }; | |
1185 | struct ocfs2_xattr_search xbs = { | |
1186 | .not_found = -ENODATA, | |
1187 | }; | |
1188 | ||
8154da3d TY |
1189 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1190 | return -EOPNOTSUPP; | |
1191 | ||
cf1d6c76 TY |
1192 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1193 | ret = -ENODATA; | |
1194 | ||
cf1d6c76 TY |
1195 | xis.inode_bh = xbs.inode_bh = di_bh; |
1196 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1197 | ||
1198 | down_read(&oi->ip_xattr_sem); | |
1199 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1200 | buffer_size, &xis); | |
6c1e183e | 1201 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1202 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1203 | buffer_size, &xbs); | |
1204 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1205 | |
1206 | return ret; | |
1207 | } | |
1208 | ||
1209 | /* ocfs2_xattr_get() | |
1210 | * | |
1211 | * Copy an extended attribute into the buffer provided. | |
1212 | * Buffer is NULL to compute the size of buffer required. | |
1213 | */ | |
1214 | static int ocfs2_xattr_get(struct inode *inode, | |
1215 | int name_index, | |
1216 | const char *name, | |
1217 | void *buffer, | |
1218 | size_t buffer_size) | |
1219 | { | |
1220 | int ret; | |
1221 | struct buffer_head *di_bh = NULL; | |
1222 | ||
1223 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1224 | if (ret < 0) { | |
1225 | mlog_errno(ret); | |
1226 | return ret; | |
1227 | } | |
1228 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1229 | name, buffer, buffer_size); | |
1230 | ||
cf1d6c76 TY |
1231 | ocfs2_inode_unlock(inode, 0); |
1232 | ||
1233 | brelse(di_bh); | |
1234 | ||
1235 | return ret; | |
1236 | } | |
1237 | ||
1238 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1239 | handle_t *handle, |
492a8a33 | 1240 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1241 | const void *value, |
1242 | int value_len) | |
1243 | { | |
71d548a6 | 1244 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1245 | u16 blocksize = inode->i_sb->s_blocksize; |
1246 | u32 p_cluster, num_clusters; | |
1247 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1248 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1249 | u64 blkno; | |
1250 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1251 | unsigned int ext_flags; |
1252 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1253 | |
1254 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1255 | ||
cf1d6c76 TY |
1256 | while (cpos < clusters) { |
1257 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1258 | &num_clusters, &xv->xr_list, |
492a8a33 | 1259 | &ext_flags); |
cf1d6c76 TY |
1260 | if (ret) { |
1261 | mlog_errno(ret); | |
85db90e7 | 1262 | goto out; |
cf1d6c76 TY |
1263 | } |
1264 | ||
492a8a33 TM |
1265 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1266 | ||
cf1d6c76 TY |
1267 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1268 | ||
1269 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1270 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1271 | &bh, NULL); | |
cf1d6c76 TY |
1272 | if (ret) { |
1273 | mlog_errno(ret); | |
85db90e7 | 1274 | goto out; |
cf1d6c76 TY |
1275 | } |
1276 | ||
1277 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1278 | INODE_CACHE(inode), |
cf1d6c76 TY |
1279 | bh, |
1280 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1281 | if (ret < 0) { | |
1282 | mlog_errno(ret); | |
85db90e7 | 1283 | goto out; |
cf1d6c76 TY |
1284 | } |
1285 | ||
1286 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1287 | memcpy(bh->b_data, value, cp_len); | |
1288 | value_len -= cp_len; | |
1289 | value += cp_len; | |
1290 | if (cp_len < blocksize) | |
1291 | memset(bh->b_data + cp_len, 0, | |
1292 | blocksize - cp_len); | |
1293 | ||
1294 | ret = ocfs2_journal_dirty(handle, bh); | |
1295 | if (ret < 0) { | |
1296 | mlog_errno(ret); | |
85db90e7 | 1297 | goto out; |
cf1d6c76 TY |
1298 | } |
1299 | brelse(bh); | |
1300 | bh = NULL; | |
1301 | ||
1302 | /* | |
1303 | * XXX: do we need to empty all the following | |
1304 | * blocks in this cluster? | |
1305 | */ | |
1306 | if (!value_len) | |
1307 | break; | |
1308 | } | |
1309 | cpos += num_clusters; | |
1310 | } | |
cf1d6c76 TY |
1311 | out: |
1312 | brelse(bh); | |
1313 | ||
1314 | return ret; | |
1315 | } | |
1316 | ||
1317 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1318 | handle_t *handle, |
cf1d6c76 TY |
1319 | struct ocfs2_xattr_info *xi, |
1320 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1321 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1322 | size_t offs) |
1323 | { | |
cf1d6c76 TY |
1324 | int ret = 0; |
1325 | size_t name_len = strlen(xi->name); | |
1326 | void *val = xs->base + offs; | |
1327 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1328 | ||
0cf2f763 | 1329 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
512620f4 | 1330 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1331 | if (ret) { |
1332 | mlog_errno(ret); | |
85db90e7 | 1333 | goto out; |
cf1d6c76 TY |
1334 | } |
1335 | /* Decrease xattr count */ | |
1336 | le16_add_cpu(&xs->header->xh_count, -1); | |
1337 | /* Remove the xattr entry and tree root which has already be set*/ | |
1338 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1339 | memset(val, 0, size); | |
1340 | ||
512620f4 | 1341 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1342 | if (ret < 0) |
1343 | mlog_errno(ret); | |
cf1d6c76 TY |
1344 | out: |
1345 | return ret; | |
1346 | } | |
1347 | ||
1348 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1349 | handle_t *handle, |
cf1d6c76 TY |
1350 | struct ocfs2_xattr_info *xi, |
1351 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1352 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1353 | size_t offs) |
1354 | { | |
85db90e7 | 1355 | int ret; |
cf1d6c76 | 1356 | |
0cf2f763 | 1357 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
0c748e95 | 1358 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1359 | if (ret) { |
1360 | mlog_errno(ret); | |
85db90e7 | 1361 | goto out; |
cf1d6c76 TY |
1362 | } |
1363 | ||
1364 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1365 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1366 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1367 | ocfs2_xattr_set_local(xs->here, 1); | |
1368 | else | |
1369 | ocfs2_xattr_set_local(xs->here, 0); | |
1370 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1371 | ||
0c748e95 | 1372 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1373 | if (ret < 0) |
1374 | mlog_errno(ret); | |
cf1d6c76 TY |
1375 | out: |
1376 | return ret; | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * ocfs2_xattr_set_value_outside() | |
1381 | * | |
1382 | * Set large size value in B tree. | |
1383 | */ | |
1384 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1385 | struct ocfs2_xattr_info *xi, | |
1386 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1387 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1388 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1389 | size_t offs) |
1390 | { | |
1391 | size_t name_len = strlen(xi->name); | |
1392 | void *val = xs->base + offs; | |
1393 | struct ocfs2_xattr_value_root *xv = NULL; | |
1394 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1395 | int ret = 0; | |
1396 | ||
1397 | memset(val, 0, size); | |
1398 | memcpy(val, xi->name, name_len); | |
1399 | xv = (struct ocfs2_xattr_value_root *) | |
1400 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1401 | xv->xr_clusters = 0; | |
1402 | xv->xr_last_eb_blk = 0; | |
1403 | xv->xr_list.l_tree_depth = 0; | |
1404 | xv->xr_list.l_count = cpu_to_le16(1); | |
1405 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1406 | vb->vb_xv = xv; |
cf1d6c76 | 1407 | |
512620f4 | 1408 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt); |
cf1d6c76 TY |
1409 | if (ret < 0) { |
1410 | mlog_errno(ret); | |
1411 | return ret; | |
1412 | } | |
512620f4 | 1413 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1414 | if (ret < 0) { |
1415 | mlog_errno(ret); | |
1416 | return ret; | |
1417 | } | |
492a8a33 | 1418 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb, |
85db90e7 | 1419 | xi->value, xi->value_len); |
cf1d6c76 TY |
1420 | if (ret < 0) |
1421 | mlog_errno(ret); | |
1422 | ||
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | /* | |
1427 | * ocfs2_xattr_set_entry_local() | |
1428 | * | |
1429 | * Set, replace or remove extended attribute in local. | |
1430 | */ | |
1431 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1432 | struct ocfs2_xattr_info *xi, | |
1433 | struct ocfs2_xattr_search *xs, | |
1434 | struct ocfs2_xattr_entry *last, | |
1435 | size_t min_offs) | |
1436 | { | |
1437 | size_t name_len = strlen(xi->name); | |
1438 | int i; | |
1439 | ||
1440 | if (xi->value && xs->not_found) { | |
1441 | /* Insert the new xattr entry. */ | |
1442 | le16_add_cpu(&xs->header->xh_count, 1); | |
1443 | ocfs2_xattr_set_type(last, xi->name_index); | |
1444 | ocfs2_xattr_set_local(last, 1); | |
1445 | last->xe_name_len = name_len; | |
1446 | } else { | |
1447 | void *first_val; | |
1448 | void *val; | |
1449 | size_t offs, size; | |
1450 | ||
1451 | first_val = xs->base + min_offs; | |
1452 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1453 | val = xs->base + offs; | |
1454 | ||
1455 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1456 | OCFS2_XATTR_INLINE_SIZE) | |
1457 | size = OCFS2_XATTR_SIZE(name_len) + | |
1458 | OCFS2_XATTR_ROOT_SIZE; | |
1459 | else | |
1460 | size = OCFS2_XATTR_SIZE(name_len) + | |
1461 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1462 | ||
1463 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1464 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1465 | /* The old and the new value have the | |
1466 | same size. Just replace the value. */ | |
1467 | ocfs2_xattr_set_local(xs->here, 1); | |
1468 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1469 | /* Clear value bytes. */ | |
1470 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1471 | 0, | |
1472 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1473 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1474 | xi->value, | |
1475 | xi->value_len); | |
1476 | return; | |
1477 | } | |
1478 | /* Remove the old name+value. */ | |
1479 | memmove(first_val + size, first_val, val - first_val); | |
1480 | memset(first_val, 0, size); | |
1481 | xs->here->xe_name_hash = 0; | |
1482 | xs->here->xe_name_offset = 0; | |
1483 | ocfs2_xattr_set_local(xs->here, 1); | |
1484 | xs->here->xe_value_size = 0; | |
1485 | ||
1486 | min_offs += size; | |
1487 | ||
1488 | /* Adjust all value offsets. */ | |
1489 | last = xs->header->xh_entries; | |
1490 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1491 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1492 | ||
1493 | if (o < offs) | |
1494 | last->xe_name_offset = cpu_to_le16(o + size); | |
1495 | last += 1; | |
1496 | } | |
1497 | ||
1498 | if (!xi->value) { | |
1499 | /* Remove the old entry. */ | |
1500 | last -= 1; | |
1501 | memmove(xs->here, xs->here + 1, | |
1502 | (void *)last - (void *)xs->here); | |
1503 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1504 | le16_add_cpu(&xs->header->xh_count, -1); | |
1505 | } | |
1506 | } | |
1507 | if (xi->value) { | |
1508 | /* Insert the new name+value. */ | |
1509 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1510 | OCFS2_XATTR_SIZE(xi->value_len); | |
1511 | void *val = xs->base + min_offs - size; | |
1512 | ||
1513 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1514 | memset(val, 0, size); | |
1515 | memcpy(val, xi->name, name_len); | |
1516 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1517 | xi->value, | |
1518 | xi->value_len); | |
1519 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1520 | ocfs2_xattr_set_local(xs->here, 1); | |
1521 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1522 | } | |
1523 | ||
1524 | return; | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * ocfs2_xattr_set_entry() | |
1529 | * | |
1530 | * Set extended attribute entry into inode or block. | |
1531 | * | |
1532 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1533 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1534 | * then set value in B tree with set_value_outside(). | |
1535 | */ | |
1536 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1537 | struct ocfs2_xattr_info *xi, | |
1538 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1539 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1540 | int flag) |
1541 | { | |
1542 | struct ocfs2_xattr_entry *last; | |
1543 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1544 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1545 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1546 | size_t size_l = 0; | |
85db90e7 | 1547 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1548 | int free, i, ret; |
1549 | struct ocfs2_xattr_info xi_l = { | |
1550 | .name_index = xi->name_index, | |
1551 | .name = xi->name, | |
1552 | .value = xi->value, | |
1553 | .value_len = xi->value_len, | |
1554 | }; | |
512620f4 JB |
1555 | struct ocfs2_xattr_value_buf vb = { |
1556 | .vb_bh = xs->xattr_bh, | |
1557 | .vb_access = ocfs2_journal_access_di, | |
1558 | }; | |
1559 | ||
1560 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1561 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1562 | vb.vb_access = ocfs2_journal_access_xb; | |
1563 | } else | |
1564 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1565 | |
1566 | /* Compute min_offs, last and free space. */ | |
1567 | last = xs->header->xh_entries; | |
1568 | ||
1569 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1570 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1571 | if (offs < min_offs) | |
1572 | min_offs = offs; | |
1573 | last += 1; | |
1574 | } | |
1575 | ||
4442f518 | 1576 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1577 | if (free < 0) |
b37c4d84 | 1578 | return -EIO; |
cf1d6c76 TY |
1579 | |
1580 | if (!xs->not_found) { | |
1581 | size_t size = 0; | |
1582 | if (ocfs2_xattr_is_local(xs->here)) | |
1583 | size = OCFS2_XATTR_SIZE(name_len) + | |
1584 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1585 | else | |
1586 | size = OCFS2_XATTR_SIZE(name_len) + | |
1587 | OCFS2_XATTR_ROOT_SIZE; | |
1588 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1589 | } | |
1590 | /* Check free space in inode or block */ | |
1591 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1592 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1593 | OCFS2_XATTR_SIZE(name_len) + | |
1594 | OCFS2_XATTR_ROOT_SIZE) { | |
1595 | ret = -ENOSPC; | |
1596 | goto out; | |
1597 | } | |
1598 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1599 | xi_l.value = (void *)&def_xv; | |
1600 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1601 | } else if (xi->value) { | |
1602 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1603 | OCFS2_XATTR_SIZE(name_len) + | |
1604 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1605 | ret = -ENOSPC; | |
1606 | goto out; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | if (!xs->not_found) { | |
1611 | /* For existing extended attribute */ | |
1612 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1613 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1614 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1615 | void *val = xs->base + offs; | |
1616 | ||
1617 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1618 | /* Replace existing local xattr with tree root */ | |
1619 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1620 | ctxt, &vb, offs); |
cf1d6c76 TY |
1621 | if (ret < 0) |
1622 | mlog_errno(ret); | |
1623 | goto out; | |
1624 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1625 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1626 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1627 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 TY |
1628 | |
1629 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1630 | /* | |
1631 | * If new value need set outside also, | |
1632 | * first truncate old value to new value, | |
1633 | * then set new value with set_value_outside(). | |
1634 | */ | |
1635 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1636 | &vb, |
78f30c31 TM |
1637 | xi->value_len, |
1638 | ctxt); | |
cf1d6c76 TY |
1639 | if (ret < 0) { |
1640 | mlog_errno(ret); | |
1641 | goto out; | |
1642 | } | |
1643 | ||
85db90e7 TM |
1644 | ret = ocfs2_xattr_update_entry(inode, |
1645 | handle, | |
1646 | xi, | |
1647 | xs, | |
0c748e95 | 1648 | &vb, |
85db90e7 | 1649 | offs); |
cf1d6c76 TY |
1650 | if (ret < 0) { |
1651 | mlog_errno(ret); | |
1652 | goto out; | |
1653 | } | |
1654 | ||
85db90e7 TM |
1655 | ret = __ocfs2_xattr_set_value_outside(inode, |
1656 | handle, | |
492a8a33 | 1657 | &vb, |
85db90e7 TM |
1658 | xi->value, |
1659 | xi->value_len); | |
cf1d6c76 TY |
1660 | if (ret < 0) |
1661 | mlog_errno(ret); | |
1662 | goto out; | |
1663 | } else { | |
1664 | /* | |
1665 | * If new value need set in local, | |
1666 | * just trucate old value to zero. | |
1667 | */ | |
1668 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1669 | &vb, |
85db90e7 TM |
1670 | 0, |
1671 | ctxt); | |
cf1d6c76 TY |
1672 | if (ret < 0) |
1673 | mlog_errno(ret); | |
1674 | } | |
1675 | } | |
1676 | } | |
1677 | ||
0cf2f763 | 1678 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh, |
512620f4 | 1679 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1680 | if (ret) { |
1681 | mlog_errno(ret); | |
85db90e7 | 1682 | goto out; |
cf1d6c76 TY |
1683 | } |
1684 | ||
1685 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
0cf2f763 | 1686 | ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh, |
512620f4 | 1687 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1688 | if (ret) { |
1689 | mlog_errno(ret); | |
85db90e7 | 1690 | goto out; |
cf1d6c76 TY |
1691 | } |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * Set value in local, include set tree root in local. | |
1696 | * This is the first step for value size >INLINE_SIZE. | |
1697 | */ | |
1698 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1699 | ||
1700 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1701 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1702 | if (ret < 0) { | |
1703 | mlog_errno(ret); | |
85db90e7 | 1704 | goto out; |
cf1d6c76 TY |
1705 | } |
1706 | } | |
1707 | ||
1708 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1709 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1710 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1711 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1712 | ||
1713 | /* | |
1714 | * Adjust extent record count or inline data size | |
1715 | * to reserve space for extended attribute. | |
1716 | */ | |
1717 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1718 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1719 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1720 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1721 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1722 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1723 | sizeof(struct ocfs2_extent_rec))); | |
1724 | } | |
1725 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1726 | } | |
1727 | /* Update xattr flag */ | |
1728 | spin_lock(&oi->ip_lock); | |
1729 | oi->ip_dyn_features |= flag; | |
1730 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1731 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1732 | |
1733 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1734 | if (ret < 0) | |
1735 | mlog_errno(ret); | |
1736 | ||
cf1d6c76 TY |
1737 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1738 | /* | |
1739 | * Set value outside in B tree. | |
1740 | * This is the second step for value size > INLINE_SIZE. | |
1741 | */ | |
1742 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1743 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1744 | &vb, offs); | |
cf1d6c76 TY |
1745 | if (ret < 0) { |
1746 | int ret2; | |
1747 | ||
1748 | mlog_errno(ret); | |
1749 | /* | |
1750 | * If set value outside failed, we have to clean | |
1751 | * the junk tree root we have already set in local. | |
1752 | */ | |
85db90e7 | 1753 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1754 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1755 | if (ret2 < 0) |
1756 | mlog_errno(ret2); | |
1757 | } | |
1758 | } | |
1759 | out: | |
1760 | return ret; | |
cf1d6c76 TY |
1761 | } |
1762 | ||
ce9c5a54 TM |
1763 | /* |
1764 | * In xattr remove, if it is stored outside and refcounted, we may have | |
1765 | * the chance to split the refcount tree. So need the allocators. | |
1766 | */ | |
1767 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
1768 | struct ocfs2_xattr_value_root *xv, | |
1769 | struct ocfs2_caching_info *ref_ci, | |
1770 | struct buffer_head *ref_root_bh, | |
1771 | struct ocfs2_alloc_context **meta_ac, | |
1772 | int *ref_credits) | |
1773 | { | |
1774 | int ret, meta_add = 0; | |
1775 | u32 p_cluster, num_clusters; | |
1776 | unsigned int ext_flags; | |
1777 | ||
1778 | *ref_credits = 0; | |
1779 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
1780 | &num_clusters, | |
1781 | &xv->xr_list, | |
1782 | &ext_flags); | |
1783 | if (ret) { | |
1784 | mlog_errno(ret); | |
1785 | goto out; | |
1786 | } | |
1787 | ||
1788 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
1789 | goto out; | |
1790 | ||
1791 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
1792 | ref_root_bh, xv, | |
1793 | &meta_add, ref_credits); | |
1794 | if (ret) { | |
1795 | mlog_errno(ret); | |
1796 | goto out; | |
1797 | } | |
1798 | ||
1799 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
1800 | meta_add, meta_ac); | |
1801 | if (ret) | |
1802 | mlog_errno(ret); | |
1803 | ||
1804 | out: | |
1805 | return ret; | |
1806 | } | |
1807 | ||
cf1d6c76 | 1808 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 1809 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
1810 | struct ocfs2_xattr_header *header, |
1811 | struct ocfs2_caching_info *ref_ci, | |
1812 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 1813 | { |
ce9c5a54 | 1814 | int ret = 0, i, ref_credits; |
78f30c31 TM |
1815 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1816 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 1817 | void *val; |
78f30c31 TM |
1818 | |
1819 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
1820 | |
1821 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1822 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1823 | ||
ce9c5a54 TM |
1824 | if (ocfs2_xattr_is_local(entry)) |
1825 | continue; | |
cf1d6c76 | 1826 | |
ce9c5a54 TM |
1827 | val = (void *)header + |
1828 | le16_to_cpu(entry->xe_name_offset); | |
1829 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
1830 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1831 | ||
1832 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
1833 | ref_ci, ref_root_bh, | |
1834 | &ctxt.meta_ac, | |
1835 | &ref_credits); | |
1836 | ||
1837 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
1838 | ocfs2_remove_extent_credits(osb->sb)); | |
1839 | if (IS_ERR(ctxt.handle)) { | |
1840 | ret = PTR_ERR(ctxt.handle); | |
1841 | mlog_errno(ret); | |
1842 | break; | |
1843 | } | |
1844 | ||
1845 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
1846 | if (ret < 0) { | |
1847 | mlog_errno(ret); | |
1848 | break; | |
1849 | } | |
1850 | ||
1851 | ocfs2_commit_trans(osb, ctxt.handle); | |
1852 | if (ctxt.meta_ac) { | |
1853 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
1854 | ctxt.meta_ac = NULL; | |
cf1d6c76 TY |
1855 | } |
1856 | } | |
1857 | ||
ce9c5a54 TM |
1858 | if (ctxt.meta_ac) |
1859 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
1860 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1861 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
1862 | return ret; |
1863 | } | |
1864 | ||
1865 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
1866 | struct buffer_head *di_bh, |
1867 | struct ocfs2_caching_info *ref_ci, | |
1868 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
1869 | { |
1870 | ||
1871 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1872 | struct ocfs2_xattr_header *header; | |
1873 | int ret; | |
4311901d JB |
1874 | struct ocfs2_xattr_value_buf vb = { |
1875 | .vb_bh = di_bh, | |
1876 | .vb_access = ocfs2_journal_access_di, | |
1877 | }; | |
cf1d6c76 TY |
1878 | |
1879 | header = (struct ocfs2_xattr_header *) | |
1880 | ((void *)di + inode->i_sb->s_blocksize - | |
1881 | le16_to_cpu(di->i_xattr_inline_size)); | |
1882 | ||
ce9c5a54 TM |
1883 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
1884 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
1885 | |
1886 | return ret; | |
1887 | } | |
1888 | ||
ce9c5a54 TM |
1889 | struct ocfs2_rm_xattr_bucket_para { |
1890 | struct ocfs2_caching_info *ref_ci; | |
1891 | struct buffer_head *ref_root_bh; | |
1892 | }; | |
1893 | ||
cf1d6c76 | 1894 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
1895 | struct buffer_head *blk_bh, |
1896 | struct ocfs2_caching_info *ref_ci, | |
1897 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
1898 | { |
1899 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 1900 | int ret = 0; |
4311901d JB |
1901 | struct ocfs2_xattr_value_buf vb = { |
1902 | .vb_bh = blk_bh, | |
1903 | .vb_access = ocfs2_journal_access_xb, | |
1904 | }; | |
ce9c5a54 TM |
1905 | struct ocfs2_rm_xattr_bucket_para args = { |
1906 | .ref_ci = ref_ci, | |
1907 | .ref_root_bh = ref_root_bh, | |
1908 | }; | |
cf1d6c76 TY |
1909 | |
1910 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1911 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1912 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
1913 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
1914 | ref_ci, ref_root_bh); | |
a3944256 | 1915 | } else |
47bca495 TM |
1916 | ret = ocfs2_iterate_xattr_index_block(inode, |
1917 | blk_bh, | |
1918 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 1919 | &args); |
cf1d6c76 TY |
1920 | |
1921 | return ret; | |
1922 | } | |
1923 | ||
08413899 | 1924 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
1925 | u64 block, |
1926 | struct ocfs2_caching_info *ref_ci, | |
1927 | struct buffer_head *ref_root_bh) | |
08413899 TM |
1928 | { |
1929 | struct inode *xb_alloc_inode; | |
1930 | struct buffer_head *xb_alloc_bh = NULL; | |
1931 | struct buffer_head *blk_bh = NULL; | |
1932 | struct ocfs2_xattr_block *xb; | |
1933 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1934 | handle_t *handle; | |
1935 | int ret = 0; | |
1936 | u64 blk, bg_blkno; | |
1937 | u16 bit; | |
1938 | ||
4ae1d69b | 1939 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1940 | if (ret < 0) { |
1941 | mlog_errno(ret); | |
1942 | goto out; | |
1943 | } | |
1944 | ||
ce9c5a54 | 1945 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
1946 | if (ret < 0) { |
1947 | mlog_errno(ret); | |
1948 | goto out; | |
1949 | } | |
1950 | ||
4ae1d69b | 1951 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1952 | blk = le64_to_cpu(xb->xb_blkno); |
1953 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1954 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1955 | ||
1956 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1957 | EXTENT_ALLOC_SYSTEM_INODE, | |
1958 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1959 | if (!xb_alloc_inode) { | |
1960 | ret = -ENOMEM; | |
1961 | mlog_errno(ret); | |
1962 | goto out; | |
1963 | } | |
1964 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1965 | ||
1966 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1967 | if (ret < 0) { | |
1968 | mlog_errno(ret); | |
1969 | goto out_mutex; | |
1970 | } | |
1971 | ||
1972 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1973 | if (IS_ERR(handle)) { | |
1974 | ret = PTR_ERR(handle); | |
1975 | mlog_errno(ret); | |
1976 | goto out_unlock; | |
1977 | } | |
1978 | ||
1979 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1980 | bit, bg_blkno, 1); | |
1981 | if (ret < 0) | |
1982 | mlog_errno(ret); | |
1983 | ||
1984 | ocfs2_commit_trans(osb, handle); | |
1985 | out_unlock: | |
1986 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1987 | brelse(xb_alloc_bh); | |
1988 | out_mutex: | |
1989 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1990 | iput(xb_alloc_inode); | |
1991 | out: | |
1992 | brelse(blk_bh); | |
1993 | return ret; | |
1994 | } | |
1995 | ||
cf1d6c76 TY |
1996 | /* |
1997 | * ocfs2_xattr_remove() | |
1998 | * | |
1999 | * Free extended attribute resources associated with this inode. | |
2000 | */ | |
2001 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2002 | { | |
cf1d6c76 TY |
2003 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2004 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2005 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2006 | struct buffer_head *ref_root_bh = NULL; | |
2007 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2008 | handle_t *handle; |
2009 | int ret; | |
2010 | ||
8154da3d TY |
2011 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2012 | return 0; | |
2013 | ||
cf1d6c76 TY |
2014 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2015 | return 0; | |
2016 | ||
ce9c5a54 TM |
2017 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
2018 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), | |
2019 | le64_to_cpu(di->i_refcount_loc), | |
2020 | 1, &ref_tree, &ref_root_bh); | |
2021 | if (ret) { | |
2022 | mlog_errno(ret); | |
2023 | goto out; | |
2024 | } | |
2025 | ref_ci = &ref_tree->rf_ci; | |
2026 | ||
2027 | } | |
2028 | ||
cf1d6c76 | 2029 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2030 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2031 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2032 | if (ret < 0) { |
2033 | mlog_errno(ret); | |
2034 | goto out; | |
2035 | } | |
2036 | } | |
cf1d6c76 | 2037 | |
08413899 TM |
2038 | if (di->i_xattr_loc) { |
2039 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2040 | le64_to_cpu(di->i_xattr_loc), |
2041 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2042 | if (ret < 0) { |
2043 | mlog_errno(ret); | |
2044 | goto out; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2049 | OCFS2_INODE_UPDATE_CREDITS); | |
2050 | if (IS_ERR(handle)) { | |
2051 | ret = PTR_ERR(handle); | |
2052 | mlog_errno(ret); | |
2053 | goto out; | |
2054 | } | |
0cf2f763 | 2055 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2056 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2057 | if (ret) { |
2058 | mlog_errno(ret); | |
2059 | goto out_commit; | |
2060 | } | |
2061 | ||
08413899 | 2062 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2063 | |
2064 | spin_lock(&oi->ip_lock); | |
2065 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2066 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2067 | spin_unlock(&oi->ip_lock); | |
2068 | ||
2069 | ret = ocfs2_journal_dirty(handle, di_bh); | |
2070 | if (ret < 0) | |
2071 | mlog_errno(ret); | |
2072 | out_commit: | |
2073 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2074 | out: | |
ce9c5a54 TM |
2075 | if (ref_tree) |
2076 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2077 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2078 | return ret; |
2079 | } | |
2080 | ||
2081 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2082 | struct ocfs2_dinode *di) | |
2083 | { | |
2084 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2085 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2086 | int free; | |
2087 | ||
2088 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2089 | return 0; | |
2090 | ||
2091 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2092 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2093 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2094 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2095 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2096 | le64_to_cpu(di->i_size); | |
2097 | } else { | |
2098 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2099 | free = (le16_to_cpu(el->l_count) - | |
2100 | le16_to_cpu(el->l_next_free_rec)) * | |
2101 | sizeof(struct ocfs2_extent_rec); | |
2102 | } | |
2103 | if (free >= xattrsize) | |
2104 | return 1; | |
2105 | ||
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | /* | |
2110 | * ocfs2_xattr_ibody_find() | |
2111 | * | |
2112 | * Find extended attribute in inode block and | |
2113 | * fill search info into struct ocfs2_xattr_search. | |
2114 | */ | |
2115 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2116 | int name_index, | |
2117 | const char *name, | |
2118 | struct ocfs2_xattr_search *xs) | |
2119 | { | |
2120 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2121 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2122 | int ret; | |
2123 | int has_space = 0; | |
2124 | ||
2125 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2126 | return 0; | |
2127 | ||
2128 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2129 | down_read(&oi->ip_alloc_sem); | |
2130 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2131 | up_read(&oi->ip_alloc_sem); | |
2132 | if (!has_space) | |
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | xs->xattr_bh = xs->inode_bh; | |
2137 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2138 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2139 | xs->header = (struct ocfs2_xattr_header *) | |
2140 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2141 | else | |
2142 | xs->header = (struct ocfs2_xattr_header *) | |
2143 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2144 | xs->base = (void *)xs->header; | |
2145 | xs->here = xs->header->xh_entries; | |
2146 | ||
2147 | /* Find the named attribute. */ | |
2148 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2149 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2150 | if (ret && ret != -ENODATA) | |
2151 | return ret; | |
2152 | xs->not_found = ret; | |
2153 | } | |
2154 | ||
2155 | return 0; | |
2156 | } | |
2157 | ||
2158 | /* | |
2159 | * ocfs2_xattr_ibody_set() | |
2160 | * | |
2161 | * Set, replace or remove an extended attribute into inode block. | |
2162 | * | |
2163 | */ | |
2164 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2165 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2166 | struct ocfs2_xattr_search *xs, |
2167 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2168 | { |
2169 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2170 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2171 | int ret; | |
2172 | ||
2173 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2174 | return -ENOSPC; | |
2175 | ||
2176 | down_write(&oi->ip_alloc_sem); | |
2177 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2178 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2179 | ret = -ENOSPC; | |
2180 | goto out; | |
2181 | } | |
2182 | } | |
2183 | ||
78f30c31 | 2184 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2185 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2186 | out: | |
2187 | up_write(&oi->ip_alloc_sem); | |
2188 | ||
2189 | return ret; | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * ocfs2_xattr_block_find() | |
2194 | * | |
2195 | * Find extended attribute in external block and | |
2196 | * fill search info into struct ocfs2_xattr_search. | |
2197 | */ | |
2198 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2199 | int name_index, | |
2200 | const char *name, | |
2201 | struct ocfs2_xattr_search *xs) | |
2202 | { | |
2203 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2204 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2205 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2206 | int ret = 0; |
2207 | ||
2208 | if (!di->i_xattr_loc) | |
2209 | return ret; | |
2210 | ||
4ae1d69b JB |
2211 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2212 | &blk_bh); | |
cf1d6c76 TY |
2213 | if (ret < 0) { |
2214 | mlog_errno(ret); | |
2215 | return ret; | |
2216 | } | |
f6087fb7 | 2217 | |
cf1d6c76 | 2218 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2219 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2220 | |
2221 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2222 | xs->header = &xb->xb_attrs.xb_header; | |
2223 | xs->base = (void *)xs->header; | |
2224 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2225 | xs->here = xs->header->xh_entries; | |
2226 | ||
2227 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2228 | } else | |
2229 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2230 | name_index, | |
2231 | name, xs); | |
cf1d6c76 | 2232 | |
cf1d6c76 TY |
2233 | if (ret && ret != -ENODATA) { |
2234 | xs->xattr_bh = NULL; | |
2235 | goto cleanup; | |
2236 | } | |
2237 | xs->not_found = ret; | |
2238 | return 0; | |
cf1d6c76 TY |
2239 | cleanup: |
2240 | brelse(blk_bh); | |
2241 | ||
2242 | return ret; | |
2243 | } | |
2244 | ||
5aea1f0e TM |
2245 | static int ocfs2_create_xattr_block(handle_t *handle, |
2246 | struct inode *inode, | |
2247 | struct buffer_head *inode_bh, | |
2248 | struct ocfs2_alloc_context *meta_ac, | |
a7fe7a3a TM |
2249 | struct buffer_head **ret_bh, |
2250 | int indexed) | |
5aea1f0e TM |
2251 | { |
2252 | int ret; | |
2253 | u16 suballoc_bit_start; | |
2254 | u32 num_got; | |
2255 | u64 first_blkno; | |
2256 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; | |
2257 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2258 | struct buffer_head *new_bh = NULL; | |
2259 | struct ocfs2_xattr_block *xblk; | |
2260 | ||
2261 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), inode_bh, | |
2262 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2263 | if (ret < 0) { | |
2264 | mlog_errno(ret); | |
2265 | goto end; | |
2266 | } | |
2267 | ||
2268 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
2269 | &suballoc_bit_start, &num_got, | |
2270 | &first_blkno); | |
2271 | if (ret < 0) { | |
2272 | mlog_errno(ret); | |
2273 | goto end; | |
2274 | } | |
2275 | ||
2276 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2277 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); | |
2278 | ||
2279 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), | |
2280 | new_bh, | |
2281 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2282 | if (ret < 0) { | |
2283 | mlog_errno(ret); | |
2284 | goto end; | |
2285 | } | |
2286 | ||
2287 | /* Initialize ocfs2_xattr_block */ | |
2288 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2289 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2290 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2291 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2292 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2293 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2294 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2295 | ||
a7fe7a3a TM |
2296 | if (indexed) { |
2297 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2298 | xr->xt_clusters = cpu_to_le32(1); | |
2299 | xr->xt_last_eb_blk = 0; | |
2300 | xr->xt_list.l_tree_depth = 0; | |
2301 | xr->xt_list.l_count = cpu_to_le16( | |
2302 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2303 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2304 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2305 | } | |
2306 | ||
5aea1f0e TM |
2307 | ret = ocfs2_journal_dirty(handle, new_bh); |
2308 | if (ret < 0) { | |
2309 | mlog_errno(ret); | |
2310 | goto end; | |
2311 | } | |
2312 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
2313 | ocfs2_journal_dirty(handle, inode_bh); | |
2314 | ||
2315 | *ret_bh = new_bh; | |
2316 | new_bh = NULL; | |
2317 | ||
2318 | end: | |
2319 | brelse(new_bh); | |
2320 | return ret; | |
2321 | } | |
2322 | ||
cf1d6c76 TY |
2323 | /* |
2324 | * ocfs2_xattr_block_set() | |
2325 | * | |
2326 | * Set, replace or remove an extended attribute into external block. | |
2327 | * | |
2328 | */ | |
2329 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2330 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2331 | struct ocfs2_xattr_search *xs, |
2332 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2333 | { |
2334 | struct buffer_head *new_bh = NULL; | |
85db90e7 | 2335 | handle_t *handle = ctxt->handle; |
cf1d6c76 | 2336 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 TY |
2337 | int ret; |
2338 | ||
2339 | if (!xs->xattr_bh) { | |
5aea1f0e | 2340 | ret = ocfs2_create_xattr_block(handle, inode, xs->inode_bh, |
a7fe7a3a | 2341 | ctxt->meta_ac, &new_bh, 0); |
5aea1f0e | 2342 | if (ret) { |
cf1d6c76 | 2343 | mlog_errno(ret); |
85db90e7 | 2344 | goto end; |
cf1d6c76 TY |
2345 | } |
2346 | ||
cf1d6c76 | 2347 | xs->xattr_bh = new_bh; |
5aea1f0e | 2348 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2349 | xs->header = &xblk->xb_attrs.xb_header; |
2350 | xs->base = (void *)xs->header; | |
2351 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2352 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2353 | } else |
2354 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2355 | ||
2356 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2357 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2358 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2359 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2360 | if (!ret || ret != -ENOSPC) |
2361 | goto end; | |
2362 | ||
78f30c31 | 2363 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2364 | if (ret) |
2365 | goto end; | |
cf1d6c76 TY |
2366 | } |
2367 | ||
78f30c31 | 2368 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2369 | |
2370 | end: | |
cf1d6c76 TY |
2371 | |
2372 | return ret; | |
2373 | } | |
2374 | ||
78f30c31 TM |
2375 | /* Check whether the new xattr can be inserted into the inode. */ |
2376 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2377 | struct ocfs2_xattr_info *xi, | |
2378 | struct ocfs2_xattr_search *xs) | |
2379 | { | |
2380 | u64 value_size; | |
2381 | struct ocfs2_xattr_entry *last; | |
2382 | int free, i; | |
2383 | size_t min_offs = xs->end - xs->base; | |
2384 | ||
2385 | if (!xs->header) | |
2386 | return 0; | |
2387 | ||
2388 | last = xs->header->xh_entries; | |
2389 | ||
2390 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2391 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2392 | if (offs < min_offs) | |
2393 | min_offs = offs; | |
2394 | last += 1; | |
2395 | } | |
2396 | ||
4442f518 | 2397 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2398 | if (free < 0) |
2399 | return 0; | |
2400 | ||
2401 | BUG_ON(!xs->not_found); | |
2402 | ||
2403 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2404 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2405 | else | |
2406 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2407 | ||
2408 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2409 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2410 | return 1; | |
2411 | ||
2412 | return 0; | |
2413 | } | |
2414 | ||
2415 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2416 | struct ocfs2_dinode *di, | |
2417 | struct ocfs2_xattr_info *xi, | |
2418 | struct ocfs2_xattr_search *xis, | |
2419 | struct ocfs2_xattr_search *xbs, | |
2420 | int *clusters_need, | |
85db90e7 TM |
2421 | int *meta_need, |
2422 | int *credits_need) | |
78f30c31 TM |
2423 | { |
2424 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2425 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2426 | struct buffer_head *bh = NULL; |
2427 | struct ocfs2_xattr_block *xb = NULL; | |
2428 | struct ocfs2_xattr_entry *xe = NULL; | |
2429 | struct ocfs2_xattr_value_root *xv = NULL; | |
2430 | char *base = NULL; | |
2431 | int name_offset, name_len = 0; | |
2432 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2433 | xi->value_len); | |
2434 | u64 value_size; | |
2435 | ||
71d548a6 TM |
2436 | /* |
2437 | * Calculate the clusters we need to write. | |
2438 | * No matter whether we replace an old one or add a new one, | |
2439 | * we need this for writing. | |
2440 | */ | |
2441 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2442 | credits += new_clusters * | |
2443 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2444 | ||
78f30c31 | 2445 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2446 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2447 | ||
2448 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2449 | clusters_add += new_clusters; |
85db90e7 TM |
2450 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2451 | &def_xv.xv.xr_list, | |
2452 | new_clusters); | |
2453 | } | |
78f30c31 TM |
2454 | |
2455 | goto meta_guess; | |
2456 | } | |
2457 | ||
2458 | if (!xis->not_found) { | |
2459 | xe = xis->here; | |
2460 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2461 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2462 | base = xis->base; | |
85db90e7 | 2463 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2464 | } else { |
970e4936 | 2465 | int i, block_off = 0; |
78f30c31 TM |
2466 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2467 | xe = xbs->here; | |
2468 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2469 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2470 | i = xbs->here - xbs->header->xh_entries; | |
2471 | old_in_xb = 1; | |
2472 | ||
2473 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 2474 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
2475 | bucket_xh(xbs->bucket), |
2476 | i, &block_off, | |
2477 | &name_offset); | |
2478 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2479 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2480 | } else { | |
78f30c31 | 2481 | base = xbs->base; |
85db90e7 TM |
2482 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2483 | } | |
2484 | } | |
2485 | ||
2486 | /* | |
2487 | * delete a xattr doesn't need metadata and cluster allocation. | |
2488 | * so just calculate the credits and return. | |
2489 | * | |
2490 | * The credits for removing the value tree will be extended | |
2491 | * by ocfs2_remove_extent itself. | |
2492 | */ | |
2493 | if (!xi->value) { | |
2494 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2495 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2496 | |
2497 | goto out; | |
78f30c31 TM |
2498 | } |
2499 | ||
2500 | /* do cluster allocation guess first. */ | |
2501 | value_size = le64_to_cpu(xe->xe_value_size); | |
2502 | ||
2503 | if (old_in_xb) { | |
2504 | /* | |
2505 | * In xattr set, we always try to set the xe in inode first, | |
2506 | * so if it can be inserted into inode successfully, the old | |
2507 | * one will be removed from the xattr block, and this xattr | |
2508 | * will be inserted into inode as a new xattr in inode. | |
2509 | */ | |
2510 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2511 | clusters_add += new_clusters; | |
a90714c1 | 2512 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2513 | OCFS2_INODE_UPDATE_CREDITS; |
2514 | if (!ocfs2_xattr_is_local(xe)) | |
2515 | credits += ocfs2_calc_extend_credits( | |
2516 | inode->i_sb, | |
2517 | &def_xv.xv.xr_list, | |
2518 | new_clusters); | |
78f30c31 TM |
2519 | goto out; |
2520 | } | |
2521 | } | |
2522 | ||
2523 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2524 | /* the new values will be stored outside. */ | |
2525 | u32 old_clusters = 0; | |
2526 | ||
2527 | if (!ocfs2_xattr_is_local(xe)) { | |
2528 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2529 | value_size); | |
2530 | xv = (struct ocfs2_xattr_value_root *) | |
2531 | (base + name_offset + name_len); | |
97aff52a | 2532 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2533 | } else |
2534 | xv = &def_xv.xv; | |
2535 | ||
85db90e7 | 2536 | if (old_clusters >= new_clusters) { |
a90714c1 | 2537 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2538 | goto out; |
85db90e7 | 2539 | } else { |
78f30c31 TM |
2540 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2541 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2542 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2543 | &xv->xr_list, | |
2544 | new_clusters - | |
2545 | old_clusters); | |
97aff52a TM |
2546 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2547 | goto out; | |
78f30c31 TM |
2548 | } |
2549 | } else { | |
2550 | /* | |
2551 | * Now the new value will be stored inside. So if the new | |
2552 | * value is smaller than the size of value root or the old | |
2553 | * value, we don't need any allocation, otherwise we have | |
2554 | * to guess metadata allocation. | |
2555 | */ | |
2556 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2557 | (!ocfs2_xattr_is_local(xe) && | |
2558 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2559 | goto out; | |
2560 | } | |
2561 | ||
2562 | meta_guess: | |
2563 | /* calculate metadata allocation. */ | |
2564 | if (di->i_xattr_loc) { | |
2565 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2566 | ret = ocfs2_read_xattr_block(inode, |
2567 | le64_to_cpu(di->i_xattr_loc), | |
2568 | &bh); | |
78f30c31 TM |
2569 | if (ret) { |
2570 | mlog_errno(ret); | |
2571 | goto out; | |
2572 | } | |
2573 | ||
2574 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2575 | } else | |
2576 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2577 | ||
90cb546c TM |
2578 | /* |
2579 | * If there is already an xattr tree, good, we can calculate | |
2580 | * like other b-trees. Otherwise we may have the chance of | |
2581 | * create a tree, the credit calculation is borrowed from | |
2582 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2583 | * new tree will be cluster based, so no meta is needed. | |
2584 | */ | |
78f30c31 TM |
2585 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2586 | struct ocfs2_extent_list *el = | |
2587 | &xb->xb_attrs.xb_root.xt_list; | |
2588 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2589 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2590 | el, 1); | |
90cb546c TM |
2591 | } else |
2592 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2593 | |
2594 | /* | |
2595 | * This cluster will be used either for new bucket or for | |
2596 | * new xattr block. | |
2597 | * If the cluster size is the same as the bucket size, one | |
2598 | * more is needed since we may need to extend the bucket | |
2599 | * also. | |
2600 | */ | |
2601 | clusters_add += 1; | |
85db90e7 | 2602 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2603 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2604 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2605 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2606 | clusters_add += 1; |
85db90e7 TM |
2607 | } |
2608 | } else { | |
78f30c31 | 2609 | meta_add += 1; |
85db90e7 TM |
2610 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2611 | } | |
78f30c31 TM |
2612 | out: |
2613 | if (clusters_need) | |
2614 | *clusters_need = clusters_add; | |
2615 | if (meta_need) | |
2616 | *meta_need = meta_add; | |
85db90e7 TM |
2617 | if (credits_need) |
2618 | *credits_need = credits; | |
78f30c31 TM |
2619 | brelse(bh); |
2620 | return ret; | |
2621 | } | |
2622 | ||
2623 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2624 | struct ocfs2_dinode *di, | |
2625 | struct ocfs2_xattr_info *xi, | |
2626 | struct ocfs2_xattr_search *xis, | |
2627 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 2628 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 2629 | int extra_meta, |
85db90e7 | 2630 | int *credits) |
78f30c31 TM |
2631 | { |
2632 | int clusters_add, meta_add, ret; | |
2633 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2634 | ||
2635 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2636 | ||
2637 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2638 | ||
2639 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2640 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2641 | if (ret) { |
2642 | mlog_errno(ret); | |
2643 | return ret; | |
2644 | } | |
2645 | ||
492a8a33 | 2646 | meta_add += extra_meta; |
85db90e7 TM |
2647 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2648 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2649 | |
2650 | if (meta_add) { | |
2651 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2652 | &ctxt->meta_ac); | |
2653 | if (ret) { | |
2654 | mlog_errno(ret); | |
2655 | goto out; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | if (clusters_add) { | |
2660 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2661 | if (ret) | |
2662 | mlog_errno(ret); | |
2663 | } | |
2664 | out: | |
2665 | if (ret) { | |
2666 | if (ctxt->meta_ac) { | |
2667 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2668 | ctxt->meta_ac = NULL; | |
2669 | } | |
2670 | ||
2671 | /* | |
2672 | * We cannot have an error and a non null ctxt->data_ac. | |
2673 | */ | |
2674 | } | |
2675 | ||
2676 | return ret; | |
2677 | } | |
2678 | ||
85db90e7 TM |
2679 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2680 | struct ocfs2_dinode *di, | |
2681 | struct ocfs2_xattr_info *xi, | |
2682 | struct ocfs2_xattr_search *xis, | |
2683 | struct ocfs2_xattr_search *xbs, | |
2684 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2685 | { | |
9f868f16 | 2686 | int ret = 0, credits, old_found; |
85db90e7 TM |
2687 | |
2688 | if (!xi->value) { | |
2689 | /* Remove existing extended attribute */ | |
2690 | if (!xis->not_found) | |
2691 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2692 | else if (!xbs->not_found) | |
2693 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2694 | } else { | |
2695 | /* We always try to set extended attribute into inode first*/ | |
2696 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2697 | if (!ret && !xbs->not_found) { | |
2698 | /* | |
2699 | * If succeed and that extended attribute existing in | |
2700 | * external block, then we will remove it. | |
2701 | */ | |
2702 | xi->value = NULL; | |
2703 | xi->value_len = 0; | |
2704 | ||
9f868f16 | 2705 | old_found = xis->not_found; |
85db90e7 TM |
2706 | xis->not_found = -ENODATA; |
2707 | ret = ocfs2_calc_xattr_set_need(inode, | |
2708 | di, | |
2709 | xi, | |
2710 | xis, | |
2711 | xbs, | |
2712 | NULL, | |
2713 | NULL, | |
2714 | &credits); | |
9f868f16 | 2715 | xis->not_found = old_found; |
85db90e7 TM |
2716 | if (ret) { |
2717 | mlog_errno(ret); | |
2718 | goto out; | |
2719 | } | |
2720 | ||
2721 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2722 | ctxt->handle->h_buffer_credits); | |
2723 | if (ret) { | |
2724 | mlog_errno(ret); | |
2725 | goto out; | |
2726 | } | |
2727 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2728 | } else if (ret == -ENOSPC) { | |
2729 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2730 | ret = ocfs2_xattr_block_find(inode, | |
2731 | xi->name_index, | |
2732 | xi->name, xbs); | |
2733 | if (ret) | |
2734 | goto out; | |
2735 | ||
9f868f16 | 2736 | old_found = xis->not_found; |
85db90e7 TM |
2737 | xis->not_found = -ENODATA; |
2738 | ret = ocfs2_calc_xattr_set_need(inode, | |
2739 | di, | |
2740 | xi, | |
2741 | xis, | |
2742 | xbs, | |
2743 | NULL, | |
2744 | NULL, | |
2745 | &credits); | |
9f868f16 | 2746 | xis->not_found = old_found; |
85db90e7 TM |
2747 | if (ret) { |
2748 | mlog_errno(ret); | |
2749 | goto out; | |
2750 | } | |
2751 | ||
2752 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2753 | ctxt->handle->h_buffer_credits); | |
2754 | if (ret) { | |
2755 | mlog_errno(ret); | |
2756 | goto out; | |
2757 | } | |
2758 | } | |
2759 | /* | |
2760 | * If no space in inode, we will set extended attribute | |
2761 | * into external block. | |
2762 | */ | |
2763 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2764 | if (ret) | |
2765 | goto out; | |
2766 | if (!xis->not_found) { | |
2767 | /* | |
2768 | * If succeed and that extended attribute | |
2769 | * existing in inode, we will remove it. | |
2770 | */ | |
2771 | xi->value = NULL; | |
2772 | xi->value_len = 0; | |
2773 | xbs->not_found = -ENODATA; | |
2774 | ret = ocfs2_calc_xattr_set_need(inode, | |
2775 | di, | |
2776 | xi, | |
2777 | xis, | |
2778 | xbs, | |
2779 | NULL, | |
2780 | NULL, | |
2781 | &credits); | |
2782 | if (ret) { | |
2783 | mlog_errno(ret); | |
2784 | goto out; | |
2785 | } | |
2786 | ||
2787 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2788 | ctxt->handle->h_buffer_credits); | |
2789 | if (ret) { | |
2790 | mlog_errno(ret); | |
2791 | goto out; | |
2792 | } | |
2793 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2794 | xis, ctxt); | |
2795 | } | |
2796 | } | |
2797 | } | |
2798 | ||
4b3f6209 TM |
2799 | if (!ret) { |
2800 | /* Update inode ctime. */ | |
0cf2f763 | 2801 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
2802 | xis->inode_bh, |
2803 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2804 | if (ret) { |
2805 | mlog_errno(ret); | |
2806 | goto out; | |
2807 | } | |
2808 | ||
2809 | inode->i_ctime = CURRENT_TIME; | |
2810 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2811 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2812 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2813 | } | |
85db90e7 TM |
2814 | out: |
2815 | return ret; | |
2816 | } | |
2817 | ||
6c3faba4 TY |
2818 | /* |
2819 | * This function only called duing creating inode | |
2820 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2821 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2822 | */ |
2823 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2824 | struct inode *inode, | |
2825 | struct buffer_head *di_bh, | |
2826 | int name_index, | |
2827 | const char *name, | |
2828 | const void *value, | |
2829 | size_t value_len, | |
2830 | int flags, | |
2831 | struct ocfs2_alloc_context *meta_ac, | |
2832 | struct ocfs2_alloc_context *data_ac) | |
2833 | { | |
2834 | struct ocfs2_dinode *di; | |
2835 | int ret; | |
2836 | ||
2837 | struct ocfs2_xattr_info xi = { | |
2838 | .name_index = name_index, | |
2839 | .name = name, | |
2840 | .value = value, | |
2841 | .value_len = value_len, | |
2842 | }; | |
2843 | ||
2844 | struct ocfs2_xattr_search xis = { | |
2845 | .not_found = -ENODATA, | |
2846 | }; | |
2847 | ||
2848 | struct ocfs2_xattr_search xbs = { | |
2849 | .not_found = -ENODATA, | |
2850 | }; | |
2851 | ||
2852 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2853 | .handle = handle, | |
2854 | .meta_ac = meta_ac, | |
2855 | .data_ac = data_ac, | |
2856 | }; | |
2857 | ||
2858 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2859 | return -EOPNOTSUPP; | |
2860 | ||
008aafaf TY |
2861 | /* |
2862 | * In extreme situation, may need xattr bucket when | |
2863 | * block size is too small. And we have already reserved | |
2864 | * the credits for bucket in mknod. | |
2865 | */ | |
2866 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2867 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2868 | if (!xbs.bucket) { | |
2869 | mlog_errno(-ENOMEM); | |
2870 | return -ENOMEM; | |
2871 | } | |
2872 | } | |
2873 | ||
6c3faba4 TY |
2874 | xis.inode_bh = xbs.inode_bh = di_bh; |
2875 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2876 | ||
2877 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2878 | ||
2879 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2880 | if (ret) | |
2881 | goto cleanup; | |
2882 | if (xis.not_found) { | |
2883 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2884 | if (ret) | |
2885 | goto cleanup; | |
2886 | } | |
2887 | ||
2888 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2889 | ||
2890 | cleanup: | |
2891 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2892 | brelse(xbs.xattr_bh); | |
008aafaf | 2893 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2894 | |
2895 | return ret; | |
2896 | } | |
2897 | ||
cf1d6c76 TY |
2898 | /* |
2899 | * ocfs2_xattr_set() | |
2900 | * | |
2901 | * Set, replace or remove an extended attribute for this inode. | |
2902 | * value is NULL to remove an existing extended attribute, else either | |
2903 | * create or replace an extended attribute. | |
2904 | */ | |
2905 | int ocfs2_xattr_set(struct inode *inode, | |
2906 | int name_index, | |
2907 | const char *name, | |
2908 | const void *value, | |
2909 | size_t value_len, | |
2910 | int flags) | |
2911 | { | |
2912 | struct buffer_head *di_bh = NULL; | |
2913 | struct ocfs2_dinode *di; | |
492a8a33 | 2914 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 2915 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2916 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2917 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
492a8a33 | 2918 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
2919 | |
2920 | struct ocfs2_xattr_info xi = { | |
2921 | .name_index = name_index, | |
2922 | .name = name, | |
2923 | .value = value, | |
2924 | .value_len = value_len, | |
2925 | }; | |
2926 | ||
2927 | struct ocfs2_xattr_search xis = { | |
2928 | .not_found = -ENODATA, | |
2929 | }; | |
2930 | ||
2931 | struct ocfs2_xattr_search xbs = { | |
2932 | .not_found = -ENODATA, | |
2933 | }; | |
2934 | ||
8154da3d TY |
2935 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2936 | return -EOPNOTSUPP; | |
2937 | ||
ba937127 JB |
2938 | /* |
2939 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2940 | * bucket. | |
2941 | */ | |
2942 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2943 | if (!xbs.bucket) { | |
2944 | mlog_errno(-ENOMEM); | |
2945 | return -ENOMEM; | |
2946 | } | |
2947 | ||
cf1d6c76 TY |
2948 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2949 | if (ret < 0) { | |
2950 | mlog_errno(ret); | |
ba937127 | 2951 | goto cleanup_nolock; |
cf1d6c76 TY |
2952 | } |
2953 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2954 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2955 | ||
2956 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2957 | /* | |
2958 | * Scan inode and external block to find the same name | |
2959 | * extended attribute and collect search infomation. | |
2960 | */ | |
2961 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2962 | if (ret) | |
2963 | goto cleanup; | |
2964 | if (xis.not_found) { | |
2965 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2966 | if (ret) | |
2967 | goto cleanup; | |
2968 | } | |
2969 | ||
2970 | if (xis.not_found && xbs.not_found) { | |
2971 | ret = -ENODATA; | |
2972 | if (flags & XATTR_REPLACE) | |
2973 | goto cleanup; | |
2974 | ret = 0; | |
2975 | if (!value) | |
2976 | goto cleanup; | |
2977 | } else { | |
2978 | ret = -EEXIST; | |
2979 | if (flags & XATTR_CREATE) | |
2980 | goto cleanup; | |
2981 | } | |
2982 | ||
492a8a33 TM |
2983 | /* Check whether the value is refcounted and do some prepartion. */ |
2984 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && | |
2985 | (!xis.not_found || !xbs.not_found)) { | |
2986 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
2987 | &xis, &xbs, &ref_tree, | |
2988 | &ref_meta, &ref_credits); | |
2989 | if (ret) { | |
2990 | mlog_errno(ret); | |
2991 | goto cleanup; | |
2992 | } | |
2993 | } | |
85db90e7 TM |
2994 | |
2995 | mutex_lock(&tl_inode->i_mutex); | |
2996 | ||
2997 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2998 | ret = __ocfs2_flush_truncate_log(osb); | |
2999 | if (ret < 0) { | |
3000 | mutex_unlock(&tl_inode->i_mutex); | |
3001 | mlog_errno(ret); | |
3002 | goto cleanup; | |
3003 | } | |
3004 | } | |
3005 | mutex_unlock(&tl_inode->i_mutex); | |
3006 | ||
3007 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3008 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3009 | if (ret) { |
3010 | mlog_errno(ret); | |
3011 | goto cleanup; | |
3012 | } | |
3013 | ||
4b3f6209 TM |
3014 | /* we need to update inode's ctime field, so add credit for it. */ |
3015 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3016 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3017 | if (IS_ERR(ctxt.handle)) { |
3018 | ret = PTR_ERR(ctxt.handle); | |
3019 | mlog_errno(ret); | |
3020 | goto cleanup; | |
cf1d6c76 | 3021 | } |
85db90e7 TM |
3022 | |
3023 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3024 | ||
3025 | ocfs2_commit_trans(osb, ctxt.handle); | |
3026 | ||
78f30c31 TM |
3027 | if (ctxt.data_ac) |
3028 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3029 | if (ctxt.meta_ac) | |
3030 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3031 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3032 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3033 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3034 | |
cf1d6c76 | 3035 | cleanup: |
492a8a33 TM |
3036 | if (ref_tree) |
3037 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3038 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3039 | if (!value && !ret) { |
3040 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3041 | if (ret) | |
3042 | mlog_errno(ret); | |
3043 | } | |
cf1d6c76 | 3044 | ocfs2_inode_unlock(inode, 1); |
ba937127 | 3045 | cleanup_nolock: |
cf1d6c76 TY |
3046 | brelse(di_bh); |
3047 | brelse(xbs.xattr_bh); | |
ba937127 | 3048 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3049 | |
3050 | return ret; | |
3051 | } | |
3052 | ||
0c044f0b TM |
3053 | /* |
3054 | * Find the xattr extent rec which may contains name_hash. | |
3055 | * e_cpos will be the first name hash of the xattr rec. | |
3056 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3057 | */ | |
3058 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3059 | u32 name_hash, | |
3060 | u64 *p_blkno, | |
3061 | u32 *e_cpos, | |
3062 | u32 *num_clusters, | |
3063 | struct ocfs2_extent_list *el) | |
3064 | { | |
3065 | int ret = 0, i; | |
3066 | struct buffer_head *eb_bh = NULL; | |
3067 | struct ocfs2_extent_block *eb; | |
3068 | struct ocfs2_extent_rec *rec = NULL; | |
3069 | u64 e_blkno = 0; | |
3070 | ||
3071 | if (el->l_tree_depth) { | |
facdb77f JB |
3072 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3073 | &eb_bh); | |
0c044f0b TM |
3074 | if (ret) { |
3075 | mlog_errno(ret); | |
3076 | goto out; | |
3077 | } | |
3078 | ||
3079 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3080 | el = &eb->h_list; | |
3081 | ||
3082 | if (el->l_tree_depth) { | |
3083 | ocfs2_error(inode->i_sb, | |
3084 | "Inode %lu has non zero tree depth in " | |
3085 | "xattr tree block %llu\n", inode->i_ino, | |
3086 | (unsigned long long)eb_bh->b_blocknr); | |
3087 | ret = -EROFS; | |
3088 | goto out; | |
3089 | } | |
3090 | } | |
3091 | ||
3092 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3093 | rec = &el->l_recs[i]; | |
3094 | ||
3095 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3096 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3097 | break; | |
3098 | } | |
3099 | } | |
3100 | ||
3101 | if (!e_blkno) { | |
3102 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
3103 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
3104 | le32_to_cpu(rec->e_cpos), | |
3105 | ocfs2_rec_clusters(el, rec)); | |
3106 | ret = -EROFS; | |
3107 | goto out; | |
3108 | } | |
3109 | ||
3110 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3111 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3112 | if (e_cpos) | |
3113 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3114 | out: | |
3115 | brelse(eb_bh); | |
3116 | return ret; | |
3117 | } | |
3118 | ||
3119 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3120 | struct ocfs2_xattr_bucket *bucket, | |
3121 | void *para); | |
3122 | ||
589dc260 | 3123 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3124 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3125 | int name_index, |
3126 | const char *name, | |
3127 | u32 name_hash, | |
3128 | u16 *xe_index, | |
3129 | int *found) | |
3130 | { | |
3131 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3132 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3133 | size_t name_len = strlen(name); |
3134 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3135 | char *xe_name; |
3136 | ||
3137 | /* | |
3138 | * We don't use binary search in the bucket because there | |
3139 | * may be multiple entries with the same name hash. | |
3140 | */ | |
3141 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3142 | xe = &xh->xh_entries[i]; | |
3143 | ||
3144 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3145 | continue; | |
3146 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3147 | break; | |
3148 | ||
3149 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3150 | if (!cmp) | |
3151 | cmp = name_len - xe->xe_name_len; | |
3152 | if (cmp) | |
3153 | continue; | |
3154 | ||
fd68a894 | 3155 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3156 | xh, |
3157 | i, | |
3158 | &block_off, | |
3159 | &new_offset); | |
3160 | if (ret) { | |
3161 | mlog_errno(ret); | |
3162 | break; | |
3163 | } | |
3164 | ||
970e4936 | 3165 | |
e2356a3f JB |
3166 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3167 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3168 | *xe_index = i; |
3169 | *found = 1; | |
3170 | ret = 0; | |
3171 | break; | |
3172 | } | |
3173 | } | |
3174 | ||
3175 | return ret; | |
3176 | } | |
3177 | ||
3178 | /* | |
3179 | * Find the specified xattr entry in a series of buckets. | |
3180 | * This series start from p_blkno and last for num_clusters. | |
3181 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3182 | * the num of the valid buckets. | |
3183 | * | |
3184 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3185 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3186 | */ | |
3187 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3188 | int name_index, | |
3189 | const char *name, | |
3190 | u32 name_hash, | |
3191 | u64 p_blkno, | |
3192 | u32 first_hash, | |
3193 | u32 num_clusters, | |
3194 | struct ocfs2_xattr_search *xs) | |
3195 | { | |
3196 | int ret, found = 0; | |
589dc260 TM |
3197 | struct ocfs2_xattr_header *xh = NULL; |
3198 | struct ocfs2_xattr_entry *xe = NULL; | |
3199 | u16 index = 0; | |
3200 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3201 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3202 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3203 | u32 last_hash; |
e2356a3f | 3204 | u64 blkno, lower_blkno = 0; |
589dc260 | 3205 | |
e2356a3f JB |
3206 | search = ocfs2_xattr_bucket_new(inode); |
3207 | if (!search) { | |
3208 | ret = -ENOMEM; | |
3209 | mlog_errno(ret); | |
3210 | goto out; | |
3211 | } | |
3212 | ||
3213 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3214 | if (ret) { |
3215 | mlog_errno(ret); | |
3216 | goto out; | |
3217 | } | |
3218 | ||
e2356a3f | 3219 | xh = bucket_xh(search); |
589dc260 | 3220 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3221 | while (low_bucket <= high_bucket) { |
e2356a3f | 3222 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3223 | |
e2356a3f | 3224 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3225 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3226 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3227 | if (ret) { |
3228 | mlog_errno(ret); | |
3229 | goto out; | |
3230 | } | |
3231 | ||
e2356a3f | 3232 | xh = bucket_xh(search); |
589dc260 TM |
3233 | xe = &xh->xh_entries[0]; |
3234 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3235 | high_bucket = bucket - 1; | |
3236 | continue; | |
3237 | } | |
3238 | ||
3239 | /* | |
3240 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3241 | * bucket is larger than the search one. for an empty |
3242 | * bucket, the last one is also the first one. | |
589dc260 | 3243 | */ |
5a095611 TM |
3244 | if (xh->xh_count) |
3245 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3246 | ||
589dc260 TM |
3247 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3248 | ||
e2356a3f JB |
3249 | /* record lower_blkno which may be the insert place. */ |
3250 | lower_blkno = blkno; | |
589dc260 TM |
3251 | |
3252 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3253 | low_bucket = bucket + 1; | |
3254 | continue; | |
3255 | } | |
3256 | ||
3257 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3258 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3259 | name_index, name, name_hash, |
3260 | &index, &found); | |
3261 | if (ret) { | |
3262 | mlog_errno(ret); | |
3263 | goto out; | |
3264 | } | |
3265 | break; | |
3266 | } | |
3267 | ||
3268 | /* | |
3269 | * Record the bucket we have found. | |
3270 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3271 | * always set it to the previous bucket. | |
3272 | */ | |
e2356a3f JB |
3273 | if (!lower_blkno) |
3274 | lower_blkno = p_blkno; | |
3275 | ||
3276 | /* This should be in cache - we just read it during the search */ | |
3277 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3278 | if (ret) { | |
3279 | mlog_errno(ret); | |
3280 | goto out; | |
589dc260 | 3281 | } |
589dc260 | 3282 | |
ba937127 JB |
3283 | xs->header = bucket_xh(xs->bucket); |
3284 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3285 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3286 | ||
3287 | if (found) { | |
589dc260 TM |
3288 | xs->here = &xs->header->xh_entries[index]; |
3289 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3290 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3291 | } else |
3292 | ret = -ENODATA; | |
3293 | ||
3294 | out: | |
e2356a3f | 3295 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3296 | return ret; |
3297 | } | |
3298 | ||
3299 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3300 | struct buffer_head *root_bh, | |
3301 | int name_index, | |
3302 | const char *name, | |
3303 | struct ocfs2_xattr_search *xs) | |
3304 | { | |
3305 | int ret; | |
3306 | struct ocfs2_xattr_block *xb = | |
3307 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3308 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3309 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3310 | u64 p_blkno = 0; | |
3311 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3312 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3313 | |
3314 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3315 | return -ENODATA; | |
3316 | ||
3317 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3318 | name, name_hash, name_index); | |
3319 | ||
3320 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3321 | &num_clusters, el); | |
3322 | if (ret) { | |
3323 | mlog_errno(ret); | |
3324 | goto out; | |
3325 | } | |
3326 | ||
3327 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3328 | ||
3329 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3330 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3331 | first_hash); | |
589dc260 TM |
3332 | |
3333 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3334 | p_blkno, first_hash, num_clusters, xs); | |
3335 | ||
3336 | out: | |
3337 | return ret; | |
3338 | } | |
3339 | ||
0c044f0b TM |
3340 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3341 | u64 blkno, | |
3342 | u32 clusters, | |
3343 | xattr_bucket_func *func, | |
3344 | void *para) | |
3345 | { | |
6dde41d9 | 3346 | int i, ret = 0; |
0c044f0b TM |
3347 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3348 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3349 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3350 | |
ba937127 JB |
3351 | bucket = ocfs2_xattr_bucket_new(inode); |
3352 | if (!bucket) { | |
3353 | mlog_errno(-ENOMEM); | |
3354 | return -ENOMEM; | |
3355 | } | |
0c044f0b TM |
3356 | |
3357 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3358 | clusters, (unsigned long long)blkno); |
0c044f0b | 3359 | |
ba937127 JB |
3360 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3361 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3362 | if (ret) { |
3363 | mlog_errno(ret); | |
ba937127 | 3364 | break; |
0c044f0b TM |
3365 | } |
3366 | ||
0c044f0b TM |
3367 | /* |
3368 | * The real bucket num in this series of blocks is stored | |
3369 | * in the 1st bucket. | |
3370 | */ | |
3371 | if (i == 0) | |
ba937127 | 3372 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3373 | |
de29c085 MF |
3374 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3375 | (unsigned long long)blkno, | |
ba937127 | 3376 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3377 | if (func) { |
ba937127 | 3378 | ret = func(inode, bucket, para); |
a46fa684 | 3379 | if (ret && ret != -ERANGE) |
0c044f0b | 3380 | mlog_errno(ret); |
ba937127 | 3381 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3382 | } |
3383 | ||
ba937127 JB |
3384 | ocfs2_xattr_bucket_relse(bucket); |
3385 | if (ret) | |
3386 | break; | |
0c044f0b TM |
3387 | } |
3388 | ||
ba937127 | 3389 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3390 | return ret; |
3391 | } | |
3392 | ||
3393 | struct ocfs2_xattr_tree_list { | |
3394 | char *buffer; | |
3395 | size_t buffer_size; | |
936b8834 | 3396 | size_t result; |
0c044f0b TM |
3397 | }; |
3398 | ||
fd68a894 | 3399 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
3400 | struct ocfs2_xattr_header *xh, |
3401 | int index, | |
3402 | int *block_off, | |
3403 | int *new_offset) | |
3404 | { | |
3405 | u16 name_offset; | |
3406 | ||
3407 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3408 | return -EINVAL; | |
3409 | ||
3410 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3411 | ||
fd68a894 TM |
3412 | *block_off = name_offset >> sb->s_blocksize_bits; |
3413 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
3414 | |
3415 | return 0; | |
3416 | } | |
3417 | ||
3418 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3419 | struct ocfs2_xattr_bucket *bucket, | |
3420 | void *para) | |
3421 | { | |
936b8834 | 3422 | int ret = 0, type; |
0c044f0b | 3423 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3424 | int i, block_off, new_offset; |
936b8834 | 3425 | const char *prefix, *name; |
0c044f0b | 3426 | |
3e632946 JB |
3427 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3428 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3429 | type = ocfs2_xattr_get_type(entry); |
3430 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3431 | |
936b8834 | 3432 | if (prefix) { |
fd68a894 | 3433 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 3434 | bucket_xh(bucket), |
0c044f0b TM |
3435 | i, |
3436 | &block_off, | |
3437 | &new_offset); | |
3438 | if (ret) | |
3439 | break; | |
936b8834 | 3440 | |
51def39f | 3441 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3442 | new_offset; |
3443 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3444 | xl->buffer_size, | |
3445 | &xl->result, | |
3446 | prefix, name, | |
3447 | entry->xe_name_len); | |
3448 | if (ret) | |
3449 | break; | |
0c044f0b TM |
3450 | } |
3451 | } | |
3452 | ||
3453 | return ret; | |
3454 | } | |
3455 | ||
47bca495 TM |
3456 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
3457 | struct buffer_head *blk_bh, | |
3458 | xattr_tree_rec_func *rec_func, | |
3459 | void *para) | |
0c044f0b | 3460 | { |
47bca495 TM |
3461 | struct ocfs2_xattr_block *xb = |
3462 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
3463 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
3464 | int ret = 0; |
3465 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3466 | u64 p_blkno = 0; | |
0c044f0b | 3467 | |
47bca495 | 3468 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
3469 | return 0; |
3470 | ||
3471 | while (name_hash > 0) { | |
3472 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3473 | &e_cpos, &num_clusters, el); | |
3474 | if (ret) { | |
3475 | mlog_errno(ret); | |
47bca495 | 3476 | break; |
0c044f0b TM |
3477 | } |
3478 | ||
47bca495 TM |
3479 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
3480 | num_clusters, para); | |
0c044f0b | 3481 | if (ret) { |
a46fa684 TM |
3482 | if (ret != -ERANGE) |
3483 | mlog_errno(ret); | |
47bca495 | 3484 | break; |
0c044f0b TM |
3485 | } |
3486 | ||
3487 | if (e_cpos == 0) | |
3488 | break; | |
3489 | ||
3490 | name_hash = e_cpos - 1; | |
3491 | } | |
3492 | ||
47bca495 TM |
3493 | return ret; |
3494 | ||
3495 | } | |
3496 | ||
3497 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
3498 | struct buffer_head *root_bh, | |
3499 | u64 blkno, u32 cpos, u32 len, void *para) | |
3500 | { | |
3501 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
3502 | ocfs2_list_xattr_bucket, para); | |
3503 | } | |
3504 | ||
3505 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3506 | struct buffer_head *blk_bh, | |
3507 | char *buffer, | |
3508 | size_t buffer_size) | |
3509 | { | |
3510 | int ret; | |
3511 | struct ocfs2_xattr_tree_list xl = { | |
3512 | .buffer = buffer, | |
3513 | .buffer_size = buffer_size, | |
3514 | .result = 0, | |
3515 | }; | |
3516 | ||
3517 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
3518 | ocfs2_list_xattr_tree_rec, &xl); | |
3519 | if (ret) { | |
3520 | mlog_errno(ret); | |
3521 | goto out; | |
3522 | } | |
3523 | ||
936b8834 | 3524 | ret = xl.result; |
0c044f0b TM |
3525 | out: |
3526 | return ret; | |
3527 | } | |
01225596 TM |
3528 | |
3529 | static int cmp_xe(const void *a, const void *b) | |
3530 | { | |
3531 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3532 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3533 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3534 | ||
3535 | if (l_hash > r_hash) | |
3536 | return 1; | |
3537 | if (l_hash < r_hash) | |
3538 | return -1; | |
3539 | return 0; | |
3540 | } | |
3541 | ||
3542 | static void swap_xe(void *a, void *b, int size) | |
3543 | { | |
3544 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3545 | ||
3546 | tmp = *l; | |
3547 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3548 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3549 | } | |
3550 | ||
3551 | /* | |
3552 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3553 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3554 | * The header goes at the start of the bucket, and the names+values are |
3555 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3556 | * Note: we need to sort the entries since they are not saved in order |
3557 | * in the ocfs2_xattr_block. | |
3558 | */ | |
3559 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3560 | struct buffer_head *xb_bh, | |
178eeac3 | 3561 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3562 | { |
3563 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3564 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3565 | u16 offset, size, off_change; |
3566 | struct ocfs2_xattr_entry *xe; | |
3567 | struct ocfs2_xattr_block *xb = | |
3568 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3569 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3570 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3571 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3572 | char *src = xb_bh->b_data; |
3573 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3574 | |
3575 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3576 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3577 | (unsigned long long)bucket_blkno(bucket)); |
3578 | ||
3579 | for (i = 0; i < blks; i++) | |
3580 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3581 | |
01225596 TM |
3582 | /* |
3583 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3584 | * there is a offset change corresponding to the change of | |
3585 | * ocfs2_xattr_header's position. | |
3586 | */ | |
3587 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3588 | xe = &xb_xh->xh_entries[count - 1]; | |
3589 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3590 | size = blocksize - offset; | |
3591 | ||
3592 | /* copy all the names and values. */ | |
01225596 TM |
3593 | memcpy(target + offset, src + offset, size); |
3594 | ||
3595 | /* Init new header now. */ | |
3596 | xh->xh_count = xb_xh->xh_count; | |
3597 | xh->xh_num_buckets = cpu_to_le16(1); | |
3598 | xh->xh_name_value_len = cpu_to_le16(size); | |
3599 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3600 | ||
3601 | /* copy all the entries. */ | |
178eeac3 | 3602 | target = bucket_block(bucket, 0); |
01225596 TM |
3603 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3604 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3605 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3606 | ||
3607 | /* Change the xe offset for all the xe because of the move. */ | |
3608 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3609 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3610 | for (i = 0; i < count; i++) | |
3611 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3612 | ||
3613 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3614 | offset, size, off_change); | |
3615 | ||
3616 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3617 | cmp_xe, swap_xe); | |
3618 | } | |
3619 | ||
3620 | /* | |
3621 | * After we move xattr from block to index btree, we have to | |
3622 | * update ocfs2_xattr_search to the new xe and base. | |
3623 | * | |
3624 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3625 | * While if the entry is in index b-tree, "bucket" indicates the | |
3626 | * real place of the xattr. | |
3627 | */ | |
178eeac3 JB |
3628 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3629 | struct ocfs2_xattr_search *xs, | |
3630 | struct buffer_head *old_bh) | |
01225596 | 3631 | { |
01225596 TM |
3632 | char *buf = old_bh->b_data; |
3633 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3634 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3635 | int i; |
01225596 | 3636 | |
ba937127 | 3637 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3638 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3639 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3640 | ||
178eeac3 JB |
3641 | if (xs->not_found) |
3642 | return; | |
01225596 | 3643 | |
178eeac3 JB |
3644 | i = xs->here - old_xh->xh_entries; |
3645 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3646 | } |
3647 | ||
3648 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3649 | struct ocfs2_xattr_search *xs, |
3650 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3651 | { |
85db90e7 | 3652 | int ret; |
01225596 TM |
3653 | u32 bit_off, len; |
3654 | u64 blkno; | |
85db90e7 | 3655 | handle_t *handle = ctxt->handle; |
01225596 TM |
3656 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3657 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3658 | struct buffer_head *xb_bh = xs->xattr_bh; |
3659 | struct ocfs2_xattr_block *xb = | |
3660 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3661 | struct ocfs2_xattr_tree_root *xr; | |
3662 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3663 | |
3664 | mlog(0, "create xattr index block for %llu\n", | |
3665 | (unsigned long long)xb_bh->b_blocknr); | |
3666 | ||
3667 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3668 | BUG_ON(!xs->bucket); |
01225596 | 3669 | |
01225596 TM |
3670 | /* |
3671 | * XXX: | |
3672 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3673 | * if performance becomes a problem later. | |
3674 | */ | |
3675 | down_write(&oi->ip_alloc_sem); | |
3676 | ||
0cf2f763 | 3677 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 3678 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3679 | if (ret) { |
3680 | mlog_errno(ret); | |
85db90e7 | 3681 | goto out; |
01225596 TM |
3682 | } |
3683 | ||
78f30c31 TM |
3684 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3685 | 1, 1, &bit_off, &len); | |
01225596 TM |
3686 | if (ret) { |
3687 | mlog_errno(ret); | |
85db90e7 | 3688 | goto out; |
01225596 TM |
3689 | } |
3690 | ||
3691 | /* | |
3692 | * The bucket may spread in many blocks, and | |
3693 | * we will only touch the 1st block and the last block | |
3694 | * in the whole bucket(one for entry and one for data). | |
3695 | */ | |
3696 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3697 | ||
de29c085 MF |
3698 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3699 | (unsigned long long)blkno); | |
01225596 | 3700 | |
178eeac3 JB |
3701 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3702 | if (ret) { | |
01225596 | 3703 | mlog_errno(ret); |
85db90e7 | 3704 | goto out; |
01225596 TM |
3705 | } |
3706 | ||
178eeac3 JB |
3707 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3708 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3709 | if (ret) { |
3710 | mlog_errno(ret); | |
85db90e7 | 3711 | goto out; |
01225596 TM |
3712 | } |
3713 | ||
178eeac3 JB |
3714 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3715 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3716 | |
178eeac3 | 3717 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3718 | |
3719 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3720 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3721 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3722 | ||
3723 | xr = &xb->xb_attrs.xb_root; | |
3724 | xr->xt_clusters = cpu_to_le32(1); | |
3725 | xr->xt_last_eb_blk = 0; | |
3726 | xr->xt_list.l_tree_depth = 0; | |
3727 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3728 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3729 | ||
3730 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3731 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3732 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3733 | ||
3734 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3735 | ||
85db90e7 | 3736 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3737 | |
85db90e7 | 3738 | out: |
01225596 TM |
3739 | up_write(&oi->ip_alloc_sem); |
3740 | ||
01225596 TM |
3741 | return ret; |
3742 | } | |
3743 | ||
3744 | static int cmp_xe_offset(const void *a, const void *b) | |
3745 | { | |
3746 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3747 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3748 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3749 | ||
3750 | if (l_name_offset < r_name_offset) | |
3751 | return 1; | |
3752 | if (l_name_offset > r_name_offset) | |
3753 | return -1; | |
3754 | return 0; | |
3755 | } | |
3756 | ||
3757 | /* | |
3758 | * defrag a xattr bucket if we find that the bucket has some | |
3759 | * holes beteen name/value pairs. | |
3760 | * We will move all the name/value pairs to the end of the bucket | |
3761 | * so that we can spare some space for insertion. | |
3762 | */ | |
3763 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3764 | handle_t *handle, |
01225596 TM |
3765 | struct ocfs2_xattr_bucket *bucket) |
3766 | { | |
3767 | int ret, i; | |
3768 | size_t end, offset, len, value_len; | |
3769 | struct ocfs2_xattr_header *xh; | |
3770 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3771 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3772 | u16 xh_free_start; |
01225596 | 3773 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3774 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3775 | |
3776 | /* | |
3777 | * In order to make the operation more efficient and generic, | |
3778 | * we copy all the blocks into a contiguous memory and do the | |
3779 | * defragment there, so if anything is error, we will not touch | |
3780 | * the real block. | |
3781 | */ | |
3782 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3783 | if (!bucket_buf) { | |
3784 | ret = -EIO; | |
3785 | goto out; | |
3786 | } | |
3787 | ||
3788 | buf = bucket_buf; | |
1c32a2fd TM |
3789 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3790 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3791 | |
1c32a2fd | 3792 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3793 | OCFS2_JOURNAL_ACCESS_WRITE); |
3794 | if (ret < 0) { | |
3795 | mlog_errno(ret); | |
85db90e7 | 3796 | goto out; |
01225596 TM |
3797 | } |
3798 | ||
3799 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3800 | entries = (char *)xh->xh_entries; | |
3801 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3802 | ||
3803 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3804 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3805 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3806 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3807 | |
3808 | /* | |
3809 | * sort all the entries by their offset. | |
3810 | * the largest will be the first, so that we can | |
3811 | * move them to the end one by one. | |
3812 | */ | |
3813 | sort(entries, le16_to_cpu(xh->xh_count), | |
3814 | sizeof(struct ocfs2_xattr_entry), | |
3815 | cmp_xe_offset, swap_xe); | |
3816 | ||
3817 | /* Move all name/values to the end of the bucket. */ | |
3818 | xe = xh->xh_entries; | |
3819 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3820 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3821 | offset = le16_to_cpu(xe->xe_name_offset); | |
3822 | if (ocfs2_xattr_is_local(xe)) | |
3823 | value_len = OCFS2_XATTR_SIZE( | |
3824 | le64_to_cpu(xe->xe_value_size)); | |
3825 | else | |
3826 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3827 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3828 | ||
3829 | /* | |
3830 | * We must make sure that the name/value pair | |
3831 | * exist in the same block. So adjust end to | |
3832 | * the previous block end if needed. | |
3833 | */ | |
3834 | if (((end - len) / blocksize != | |
3835 | (end - 1) / blocksize)) | |
3836 | end = end - end % blocksize; | |
3837 | ||
3838 | if (end > offset + len) { | |
3839 | memmove(bucket_buf + end - len, | |
3840 | bucket_buf + offset, len); | |
3841 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3842 | } | |
3843 | ||
3844 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3845 | "bucket %llu\n", (unsigned long long)blkno); | |
3846 | ||
3847 | end -= len; | |
3848 | } | |
3849 | ||
3850 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3851 | "bucket %llu\n", (unsigned long long)blkno); | |
3852 | ||
3853 | if (xh_free_start == end) | |
85db90e7 | 3854 | goto out; |
01225596 TM |
3855 | |
3856 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3857 | xh->xh_free_start = cpu_to_le16(end); | |
3858 | ||
3859 | /* sort the entries by their name_hash. */ | |
3860 | sort(entries, le16_to_cpu(xh->xh_count), | |
3861 | sizeof(struct ocfs2_xattr_entry), | |
3862 | cmp_xe, swap_xe); | |
3863 | ||
3864 | buf = bucket_buf; | |
1c32a2fd TM |
3865 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3866 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3867 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3868 | |
01225596 | 3869 | out: |
01225596 TM |
3870 | kfree(bucket_buf); |
3871 | return ret; | |
3872 | } | |
3873 | ||
3874 | /* | |
b5c03e74 JB |
3875 | * prev_blkno points to the start of an existing extent. new_blkno |
3876 | * points to a newly allocated extent. Because we know each of our | |
3877 | * clusters contains more than bucket, we can easily split one cluster | |
3878 | * at a bucket boundary. So we take the last cluster of the existing | |
3879 | * extent and split it down the middle. We move the last half of the | |
3880 | * buckets in the last cluster of the existing extent over to the new | |
3881 | * extent. | |
01225596 | 3882 | * |
b5c03e74 JB |
3883 | * first_bh is the buffer at prev_blkno so we can update the existing |
3884 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3885 | * to insert our xattr. If the bucket move places the target in the new | |
3886 | * extent, we'll update first_bh and header_bh after modifying the old | |
3887 | * extent. | |
3888 | * | |
3889 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3890 | */ |
3891 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3892 | handle_t *handle, | |
41cb8148 JB |
3893 | struct ocfs2_xattr_bucket *first, |
3894 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3895 | u64 new_blkno, |
01225596 TM |
3896 | u32 num_clusters, |
3897 | u32 *first_hash) | |
3898 | { | |
c58b6032 | 3899 | int ret; |
41cb8148 JB |
3900 | struct super_block *sb = inode->i_sb; |
3901 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3902 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3903 | int to_move = num_buckets / 2; |
c58b6032 | 3904 | u64 src_blkno; |
41cb8148 JB |
3905 | u64 last_cluster_blkno = bucket_blkno(first) + |
3906 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3907 | |
41cb8148 JB |
3908 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3909 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3910 | |
01225596 | 3911 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3912 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3913 | |
41cb8148 | 3914 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3915 | last_cluster_blkno, new_blkno, |
3916 | to_move, first_hash); | |
01225596 TM |
3917 | if (ret) { |
3918 | mlog_errno(ret); | |
3919 | goto out; | |
3920 | } | |
3921 | ||
c58b6032 JB |
3922 | /* This is the first bucket that got moved */ |
3923 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3924 | |
b5c03e74 | 3925 | /* |
c58b6032 | 3926 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3927 | * update first and target. |
b5c03e74 | 3928 | */ |
41cb8148 | 3929 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3930 | /* Find the block for the new target bucket */ |
3931 | src_blkno = new_blkno + | |
41cb8148 JB |
3932 | (bucket_blkno(target) - src_blkno); |
3933 | ||
3934 | ocfs2_xattr_bucket_relse(first); | |
3935 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3936 | |
b5c03e74 | 3937 | /* |
c58b6032 | 3938 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3939 | * journal from ocfs2_cp_xattr_bucket(). |
3940 | */ | |
41cb8148 | 3941 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3942 | if (ret) { |
3943 | mlog_errno(ret); | |
3944 | goto out; | |
3945 | } | |
41cb8148 JB |
3946 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3947 | if (ret) | |
b5c03e74 | 3948 | mlog_errno(ret); |
01225596 | 3949 | |
01225596 TM |
3950 | } |
3951 | ||
01225596 | 3952 | out: |
01225596 TM |
3953 | return ret; |
3954 | } | |
3955 | ||
01225596 | 3956 | /* |
80bcaf34 TM |
3957 | * Find the suitable pos when we divide a bucket into 2. |
3958 | * We have to make sure the xattrs with the same hash value exist | |
3959 | * in the same bucket. | |
3960 | * | |
3961 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3962 | * place where the hash value changes. Try to find the most even split. | |
3963 | * The most common case is that all entries have different hash values, | |
3964 | * and the first check we make will find a place to split. | |
3965 | */ | |
3966 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3967 | { | |
3968 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3969 | int count = le16_to_cpu(xh->xh_count); | |
3970 | int delta, middle = count / 2; | |
3971 | ||
3972 | /* | |
3973 | * We start at the middle. Each step gets farther away in both | |
3974 | * directions. We therefore hit the change in hash value | |
3975 | * nearest to the middle. Note that this loop does not execute for | |
3976 | * count < 2. | |
3977 | */ | |
3978 | for (delta = 0; delta < middle; delta++) { | |
3979 | /* Let's check delta earlier than middle */ | |
3980 | if (cmp_xe(&entries[middle - delta - 1], | |
3981 | &entries[middle - delta])) | |
3982 | return middle - delta; | |
3983 | ||
3984 | /* For even counts, don't walk off the end */ | |
3985 | if ((middle + delta + 1) == count) | |
3986 | continue; | |
3987 | ||
3988 | /* Now try delta past middle */ | |
3989 | if (cmp_xe(&entries[middle + delta], | |
3990 | &entries[middle + delta + 1])) | |
3991 | return middle + delta + 1; | |
3992 | } | |
3993 | ||
3994 | /* Every entry had the same hash */ | |
3995 | return count; | |
3996 | } | |
3997 | ||
3998 | /* | |
3999 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4000 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4001 | * |
4002 | * Normally half of the xattrs will be moved. But we have to make | |
4003 | * sure that the xattrs with the same hash value are stored in the | |
4004 | * same bucket. If all the xattrs in this bucket have the same hash | |
4005 | * value, the new bucket will be initialized as an empty one and the | |
4006 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4007 | */ |
80bcaf34 TM |
4008 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4009 | handle_t *handle, | |
4010 | u64 blk, | |
4011 | u64 new_blk, | |
4012 | u32 *first_hash, | |
4013 | int new_bucket_head) | |
01225596 TM |
4014 | { |
4015 | int ret, i; | |
80bcaf34 | 4016 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 4017 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4018 | struct ocfs2_xattr_header *xh; |
4019 | struct ocfs2_xattr_entry *xe; | |
4020 | int blocksize = inode->i_sb->s_blocksize; | |
4021 | ||
80bcaf34 | 4022 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 4023 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 4024 | |
ba937127 JB |
4025 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4026 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4027 | if (!s_bucket || !t_bucket) { | |
4028 | ret = -ENOMEM; | |
4029 | mlog_errno(ret); | |
4030 | goto out; | |
4031 | } | |
01225596 | 4032 | |
ba937127 | 4033 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4034 | if (ret) { |
4035 | mlog_errno(ret); | |
4036 | goto out; | |
4037 | } | |
4038 | ||
ba937127 | 4039 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4040 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4041 | if (ret) { |
4042 | mlog_errno(ret); | |
4043 | goto out; | |
4044 | } | |
4045 | ||
784b816a JB |
4046 | /* |
4047 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4048 | * there's no need to read it. | |
4049 | */ | |
ba937127 | 4050 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
4051 | if (ret) { |
4052 | mlog_errno(ret); | |
4053 | goto out; | |
4054 | } | |
4055 | ||
2b656c1d JB |
4056 | /* |
4057 | * Hey, if we're overwriting t_bucket, what difference does | |
4058 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4059 | * same part of ocfs2_cp_xattr_bucket(). | |
4060 | */ | |
ba937127 | 4061 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4062 | new_bucket_head ? |
4063 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4064 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4065 | if (ret) { | |
4066 | mlog_errno(ret); | |
4067 | goto out; | |
01225596 TM |
4068 | } |
4069 | ||
ba937127 | 4070 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4071 | count = le16_to_cpu(xh->xh_count); |
4072 | start = ocfs2_xattr_find_divide_pos(xh); | |
4073 | ||
4074 | if (start == count) { | |
4075 | xe = &xh->xh_entries[start-1]; | |
4076 | ||
4077 | /* | |
4078 | * initialized a new empty bucket here. | |
4079 | * The hash value is set as one larger than | |
4080 | * that of the last entry in the previous bucket. | |
4081 | */ | |
ba937127 JB |
4082 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4083 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4084 | |
ba937127 | 4085 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4086 | xh->xh_free_start = cpu_to_le16(blocksize); |
4087 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4088 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4089 | ||
4090 | goto set_num_buckets; | |
4091 | } | |
4092 | ||
01225596 | 4093 | /* copy the whole bucket to the new first. */ |
ba937127 | 4094 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4095 | |
4096 | /* update the new bucket. */ | |
ba937127 | 4097 | xh = bucket_xh(t_bucket); |
01225596 TM |
4098 | |
4099 | /* | |
4100 | * Calculate the total name/value len and xh_free_start for | |
4101 | * the old bucket first. | |
4102 | */ | |
4103 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4104 | name_value_len = 0; | |
4105 | for (i = 0; i < start; i++) { | |
4106 | xe = &xh->xh_entries[i]; | |
4107 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4108 | if (ocfs2_xattr_is_local(xe)) | |
4109 | xe_len += | |
4110 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4111 | else | |
4112 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4113 | name_value_len += xe_len; | |
4114 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
4115 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4116 | } | |
4117 | ||
4118 | /* | |
4119 | * Now begin the modification to the new bucket. | |
4120 | * | |
4121 | * In the new bucket, We just move the xattr entry to the beginning | |
4122 | * and don't touch the name/value. So there will be some holes in the | |
4123 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4124 | * called. | |
4125 | */ | |
4126 | xe = &xh->xh_entries[start]; | |
4127 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
4128 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
4129 | (int)((char *)xe - (char *)xh), |
4130 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4131 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4132 | xe = &xh->xh_entries[count - start]; | |
4133 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4134 | memset((char *)xe, 0, len); | |
4135 | ||
4136 | le16_add_cpu(&xh->xh_count, -start); | |
4137 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4138 | ||
4139 | /* Calculate xh_free_start for the new bucket. */ | |
4140 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4141 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4142 | xe = &xh->xh_entries[i]; | |
4143 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4144 | if (ocfs2_xattr_is_local(xe)) | |
4145 | xe_len += | |
4146 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4147 | else | |
4148 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4149 | if (le16_to_cpu(xe->xe_name_offset) < | |
4150 | le16_to_cpu(xh->xh_free_start)) | |
4151 | xh->xh_free_start = xe->xe_name_offset; | |
4152 | } | |
4153 | ||
80bcaf34 | 4154 | set_num_buckets: |
01225596 TM |
4155 | /* set xh->xh_num_buckets for the new xh. */ |
4156 | if (new_bucket_head) | |
4157 | xh->xh_num_buckets = cpu_to_le16(1); | |
4158 | else | |
4159 | xh->xh_num_buckets = 0; | |
4160 | ||
ba937127 | 4161 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4162 | |
4163 | /* store the first_hash of the new bucket. */ | |
4164 | if (first_hash) | |
4165 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4166 | ||
4167 | /* | |
80bcaf34 TM |
4168 | * Now only update the 1st block of the old bucket. If we |
4169 | * just added a new empty bucket, there is no need to modify | |
4170 | * it. | |
01225596 | 4171 | */ |
80bcaf34 TM |
4172 | if (start == count) |
4173 | goto out; | |
4174 | ||
ba937127 | 4175 | xh = bucket_xh(s_bucket); |
01225596 TM |
4176 | memset(&xh->xh_entries[start], 0, |
4177 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4178 | xh->xh_count = cpu_to_le16(start); | |
4179 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4180 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4181 | ||
ba937127 | 4182 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4183 | |
4184 | out: | |
ba937127 JB |
4185 | ocfs2_xattr_bucket_free(s_bucket); |
4186 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4187 | |
4188 | return ret; | |
4189 | } | |
4190 | ||
4191 | /* | |
4192 | * Copy xattr from one bucket to another bucket. | |
4193 | * | |
4194 | * The caller must make sure that the journal transaction | |
4195 | * has enough space for journaling. | |
4196 | */ | |
4197 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4198 | handle_t *handle, | |
4199 | u64 s_blkno, | |
4200 | u64 t_blkno, | |
4201 | int t_is_new) | |
4202 | { | |
4980c6da | 4203 | int ret; |
ba937127 | 4204 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4205 | |
4206 | BUG_ON(s_blkno == t_blkno); | |
4207 | ||
4208 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
4209 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
4210 | t_is_new); | |
01225596 | 4211 | |
ba937127 JB |
4212 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4213 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4214 | if (!s_bucket || !t_bucket) { | |
4215 | ret = -ENOMEM; | |
4216 | mlog_errno(ret); | |
4217 | goto out; | |
4218 | } | |
92de109a | 4219 | |
ba937127 | 4220 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4221 | if (ret) |
4222 | goto out; | |
4223 | ||
784b816a JB |
4224 | /* |
4225 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4226 | * there's no need to read it. | |
4227 | */ | |
ba937127 | 4228 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
4229 | if (ret) |
4230 | goto out; | |
4231 | ||
2b656c1d JB |
4232 | /* |
4233 | * Hey, if we're overwriting t_bucket, what difference does | |
4234 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4235 | * cluster to fill, we came here from |
4236 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4237 | * ACCESS_CREATE is required. But we also might have moved data | |
4238 | * out of t_bucket before extending back into it. | |
4239 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4240 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4241 | * and copied out the end of the old extent. Then it re-extends |
4242 | * the old extent back to create space for new xattrs. That's | |
4243 | * how we get here, and the bucket isn't really new. | |
4244 | */ | |
ba937127 | 4245 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4246 | t_is_new ? |
4247 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4248 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4249 | if (ret) | |
4250 | goto out; | |
01225596 | 4251 | |
ba937127 JB |
4252 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4253 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4254 | |
4255 | out: | |
ba937127 JB |
4256 | ocfs2_xattr_bucket_free(t_bucket); |
4257 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4258 | |
4259 | return ret; | |
4260 | } | |
4261 | ||
4262 | /* | |
874d65af JB |
4263 | * src_blk points to the start of an existing extent. last_blk points to |
4264 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4265 | * extent. We copy the buckets from the cluster at last_blk to the new |
4266 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4267 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4268 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4269 | * by the same amount. | |
01225596 | 4270 | */ |
54ecb6b6 JB |
4271 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4272 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4273 | unsigned int start_bucket, | |
4274 | u32 *first_hash) | |
01225596 TM |
4275 | { |
4276 | int i, ret, credits; | |
4277 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4278 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4279 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4280 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4281 | |
874d65af JB |
4282 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4283 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4284 | |
54ecb6b6 JB |
4285 | BUG_ON(start_bucket >= num_buckets); |
4286 | if (start_bucket) { | |
4287 | num_buckets -= start_bucket; | |
4288 | last_blk += (start_bucket * blks_per_bucket); | |
4289 | } | |
4290 | ||
15d60929 JB |
4291 | /* The first bucket of the original extent */ |
4292 | old_first = ocfs2_xattr_bucket_new(inode); | |
4293 | /* The first bucket of the new extent */ | |
4294 | new_first = ocfs2_xattr_bucket_new(inode); | |
4295 | if (!old_first || !new_first) { | |
4296 | ret = -ENOMEM; | |
4297 | mlog_errno(ret); | |
4298 | goto out; | |
4299 | } | |
4300 | ||
874d65af | 4301 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4302 | if (ret) { |
4303 | mlog_errno(ret); | |
4304 | goto out; | |
4305 | } | |
4306 | ||
01225596 | 4307 | /* |
54ecb6b6 JB |
4308 | * We need to update the first bucket of the old extent and all |
4309 | * the buckets going to the new extent. | |
01225596 | 4310 | */ |
54ecb6b6 JB |
4311 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4312 | handle->h_buffer_credits; | |
01225596 TM |
4313 | ret = ocfs2_extend_trans(handle, credits); |
4314 | if (ret) { | |
4315 | mlog_errno(ret); | |
4316 | goto out; | |
4317 | } | |
4318 | ||
15d60929 JB |
4319 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4320 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4321 | if (ret) { |
4322 | mlog_errno(ret); | |
4323 | goto out; | |
4324 | } | |
4325 | ||
4326 | for (i = 0; i < num_buckets; i++) { | |
4327 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4328 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4329 | to_blk + (i * blks_per_bucket), |
4330 | 1); | |
01225596 TM |
4331 | if (ret) { |
4332 | mlog_errno(ret); | |
4333 | goto out; | |
4334 | } | |
01225596 TM |
4335 | } |
4336 | ||
15d60929 JB |
4337 | /* |
4338 | * Get the new bucket ready before we dirty anything | |
4339 | * (This actually shouldn't fail, because we already dirtied | |
4340 | * it once in ocfs2_cp_xattr_bucket()). | |
4341 | */ | |
4342 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4343 | if (ret) { | |
01225596 TM |
4344 | mlog_errno(ret); |
4345 | goto out; | |
4346 | } | |
15d60929 JB |
4347 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4348 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4349 | if (ret) { |
4350 | mlog_errno(ret); | |
4351 | goto out; | |
4352 | } | |
4353 | ||
15d60929 JB |
4354 | /* Now update the headers */ |
4355 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4356 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4357 | |
15d60929 JB |
4358 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4359 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4360 | |
4361 | if (first_hash) | |
15d60929 JB |
4362 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4363 | ||
01225596 | 4364 | out: |
15d60929 JB |
4365 | ocfs2_xattr_bucket_free(new_first); |
4366 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4367 | return ret; |
4368 | } | |
4369 | ||
4370 | /* | |
80bcaf34 | 4371 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4372 | * This function should only be called when bucket size == cluster size. |
4373 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4374 | */ | |
80bcaf34 TM |
4375 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4376 | handle_t *handle, | |
4377 | u64 prev_blk, | |
4378 | u64 new_blk, | |
4379 | u32 *first_hash) | |
01225596 TM |
4380 | { |
4381 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4382 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4383 | |
4384 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4385 | ||
4386 | ret = ocfs2_extend_trans(handle, credits); | |
4387 | if (ret) { | |
4388 | mlog_errno(ret); | |
4389 | return ret; | |
4390 | } | |
4391 | ||
4392 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4393 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4394 | new_blk, first_hash, 1); | |
01225596 TM |
4395 | } |
4396 | ||
4397 | /* | |
4398 | * Move some xattrs from the old cluster to the new one since they are not | |
4399 | * contiguous in ocfs2 xattr tree. | |
4400 | * | |
4401 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4402 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4403 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4404 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4405 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4406 | * to extend the insert bucket. | |
4407 | * | |
4408 | * The problem is how much xattr should we move to the new one and when should | |
4409 | * we update first_bh and header_bh? | |
4410 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4411 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4412 | * update the first_bh and header_bh if the insert bucket has been moved | |
4413 | * to the new cluster. | |
4414 | * 2. If cluster_size == bucket_size: | |
4415 | * a) If the previous extent rec has more than one cluster and the insert | |
4416 | * place isn't in the last cluster, copy the entire last cluster to the | |
4417 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4418 | * since they will not be moved into the new cluster. | |
4419 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4420 | * the new one. And we set the extend flag to zero if the insert place is | |
4421 | * moved into the new allocated cluster since no extend is needed. | |
4422 | */ | |
4423 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4424 | handle_t *handle, | |
012ee910 JB |
4425 | struct ocfs2_xattr_bucket *first, |
4426 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4427 | u64 new_blk, |
01225596 TM |
4428 | u32 prev_clusters, |
4429 | u32 *v_start, | |
4430 | int *extend) | |
4431 | { | |
92cf3adf | 4432 | int ret; |
01225596 TM |
4433 | |
4434 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4435 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4436 | (unsigned long long)new_blk); |
01225596 | 4437 | |
41cb8148 | 4438 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4439 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4440 | handle, | |
41cb8148 | 4441 | first, target, |
01225596 | 4442 | new_blk, |
01225596 TM |
4443 | prev_clusters, |
4444 | v_start); | |
012ee910 | 4445 | if (ret) |
41cb8148 | 4446 | mlog_errno(ret); |
41cb8148 | 4447 | } else { |
92cf3adf JB |
4448 | /* The start of the last cluster in the first extent */ |
4449 | u64 last_blk = bucket_blkno(first) + | |
4450 | ((prev_clusters - 1) * | |
4451 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4452 | |
012ee910 | 4453 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4454 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4455 | bucket_blkno(first), |
54ecb6b6 | 4456 | last_blk, new_blk, 0, |
01225596 | 4457 | v_start); |
012ee910 JB |
4458 | if (ret) |
4459 | mlog_errno(ret); | |
4460 | } else { | |
80bcaf34 TM |
4461 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4462 | last_blk, new_blk, | |
4463 | v_start); | |
012ee910 JB |
4464 | if (ret) |
4465 | mlog_errno(ret); | |
01225596 | 4466 | |
92cf3adf | 4467 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4468 | *extend = 0; |
4469 | } | |
4470 | } | |
4471 | ||
4472 | return ret; | |
4473 | } | |
4474 | ||
4475 | /* | |
4476 | * Add a new cluster for xattr storage. | |
4477 | * | |
4478 | * If the new cluster is contiguous with the previous one, it will be | |
4479 | * appended to the same extent record, and num_clusters will be updated. | |
4480 | * If not, we will insert a new extent for it and move some xattrs in | |
4481 | * the last cluster into the new allocated one. | |
4482 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4483 | * lose the benefits of hashing because we'll have to search large leaves. | |
4484 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4485 | * if it's bigger). | |
4486 | * | |
4487 | * first_bh is the first block of the previous extent rec and header_bh | |
4488 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4489 | * when the header_bh is moved into the new cluster. | |
4490 | */ | |
4491 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4492 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4493 | struct ocfs2_xattr_bucket *first, |
4494 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4495 | u32 *num_clusters, |
4496 | u32 prev_cpos, | |
78f30c31 TM |
4497 | int *extend, |
4498 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4499 | { |
85db90e7 | 4500 | int ret; |
01225596 TM |
4501 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4502 | u32 prev_clusters = *num_clusters; | |
4503 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4504 | u64 block; | |
85db90e7 | 4505 | handle_t *handle = ctxt->handle; |
01225596 | 4506 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4507 | struct ocfs2_extent_tree et; |
01225596 TM |
4508 | |
4509 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4510 | "previous xattr blkno = %llu\n", | |
4511 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4512 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4513 | |
5e404e9e | 4514 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 4515 | |
0cf2f763 | 4516 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4517 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4518 | if (ret < 0) { |
4519 | mlog_errno(ret); | |
4520 | goto leave; | |
4521 | } | |
4522 | ||
78f30c31 | 4523 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4524 | clusters_to_add, &bit_off, &num_bits); |
4525 | if (ret < 0) { | |
4526 | if (ret != -ENOSPC) | |
4527 | mlog_errno(ret); | |
4528 | goto leave; | |
4529 | } | |
4530 | ||
4531 | BUG_ON(num_bits > clusters_to_add); | |
4532 | ||
4533 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4534 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4535 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4536 | ||
ed29c0ca | 4537 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4538 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4539 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4540 | /* | |
4541 | * If this cluster is contiguous with the old one and | |
4542 | * adding this new cluster, we don't surpass the limit of | |
4543 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4544 | * initialized and used like other buckets in the previous | |
4545 | * cluster. | |
4546 | * So add it as a contiguous one. The caller will handle | |
4547 | * its init process. | |
4548 | */ | |
4549 | v_start = prev_cpos + prev_clusters; | |
4550 | *num_clusters = prev_clusters + num_bits; | |
4551 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4552 | num_bits); | |
4553 | } else { | |
4554 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4555 | handle, | |
012ee910 JB |
4556 | first, |
4557 | target, | |
01225596 | 4558 | block, |
01225596 TM |
4559 | prev_clusters, |
4560 | &v_start, | |
4561 | extend); | |
4562 | if (ret) { | |
4563 | mlog_errno(ret); | |
4564 | goto leave; | |
4565 | } | |
4566 | } | |
4567 | ||
4568 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4569 | num_bits, (unsigned long long)block, v_start); |
cc79d8c1 | 4570 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 4571 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4572 | if (ret < 0) { |
4573 | mlog_errno(ret); | |
4574 | goto leave; | |
4575 | } | |
4576 | ||
4577 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4578 | if (ret < 0) |
01225596 | 4579 | mlog_errno(ret); |
01225596 TM |
4580 | |
4581 | leave: | |
01225596 TM |
4582 | return ret; |
4583 | } | |
4584 | ||
4585 | /* | |
92de109a JB |
4586 | * We are given an extent. 'first' is the bucket at the very front of |
4587 | * the extent. The extent has space for an additional bucket past | |
4588 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4589 | * of the target bucket. We wish to shift every bucket past the target | |
4590 | * down one, filling in that additional space. When we get back to the | |
4591 | * target, we split the target between itself and the now-empty bucket | |
4592 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4593 | */ |
4594 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4595 | handle_t *handle, |
92de109a JB |
4596 | struct ocfs2_xattr_bucket *first, |
4597 | u64 target_blk, | |
01225596 TM |
4598 | u32 num_clusters) |
4599 | { | |
4600 | int ret, credits; | |
4601 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4602 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4603 | u64 end_blk; |
4604 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4605 | |
4606 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4607 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4608 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4609 | |
92de109a JB |
4610 | /* The extent must have room for an additional bucket */ |
4611 | BUG_ON(new_bucket >= | |
4612 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4613 | |
92de109a JB |
4614 | /* end_blk points to the last existing bucket */ |
4615 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4616 | |
4617 | /* | |
92de109a JB |
4618 | * end_blk is the start of the last existing bucket. |
4619 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4620 | * every bucket after it up to, but not including, the last | |
4621 | * existing bucket. Then we add the last existing bucket, the | |
4622 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4623 | */ |
92de109a | 4624 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4625 | handle->h_buffer_credits; |
4626 | ret = ocfs2_extend_trans(handle, credits); | |
4627 | if (ret) { | |
01225596 TM |
4628 | mlog_errno(ret); |
4629 | goto out; | |
4630 | } | |
4631 | ||
92de109a JB |
4632 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4633 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4634 | if (ret) { |
4635 | mlog_errno(ret); | |
85db90e7 | 4636 | goto out; |
01225596 TM |
4637 | } |
4638 | ||
92de109a | 4639 | while (end_blk != target_blk) { |
01225596 TM |
4640 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4641 | end_blk + blk_per_bucket, 0); | |
4642 | if (ret) | |
85db90e7 | 4643 | goto out; |
01225596 TM |
4644 | end_blk -= blk_per_bucket; |
4645 | } | |
4646 | ||
92de109a JB |
4647 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4648 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4649 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4650 | |
92de109a JB |
4651 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4652 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4653 | |
01225596 TM |
4654 | out: |
4655 | return ret; | |
4656 | } | |
4657 | ||
4658 | /* | |
91f2033f JB |
4659 | * Add new xattr bucket in an extent record and adjust the buckets |
4660 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4661 | * bucket we want to insert into. | |
01225596 | 4662 | * |
91f2033f JB |
4663 | * In the easy case, we will move all the buckets after target down by |
4664 | * one. Half of target's xattrs will be moved to the next bucket. | |
4665 | * | |
4666 | * If current cluster is full, we'll allocate a new one. This may not | |
4667 | * be contiguous. The underlying calls will make sure that there is | |
4668 | * space for the insert, shifting buckets around if necessary. | |
4669 | * 'target' may be moved by those calls. | |
01225596 TM |
4670 | */ |
4671 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4672 | struct buffer_head *xb_bh, | |
91f2033f | 4673 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4674 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4675 | { |
01225596 TM |
4676 | struct ocfs2_xattr_block *xb = |
4677 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4678 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4679 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4680 | u32 name_hash = |
4681 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4682 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4683 | int ret, num_buckets, extend = 1; |
4684 | u64 p_blkno; | |
4685 | u32 e_cpos, num_clusters; | |
92de109a | 4686 | /* The bucket at the front of the extent */ |
91f2033f | 4687 | struct ocfs2_xattr_bucket *first; |
01225596 | 4688 | |
91f2033f JB |
4689 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4690 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4691 | |
ed29c0ca | 4692 | /* The first bucket of the original extent */ |
92de109a | 4693 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4694 | if (!first) { |
92de109a JB |
4695 | ret = -ENOMEM; |
4696 | mlog_errno(ret); | |
4697 | goto out; | |
4698 | } | |
4699 | ||
01225596 TM |
4700 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4701 | &num_clusters, el); | |
4702 | if (ret) { | |
4703 | mlog_errno(ret); | |
4704 | goto out; | |
4705 | } | |
4706 | ||
ed29c0ca | 4707 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4708 | if (ret) { |
4709 | mlog_errno(ret); | |
4710 | goto out; | |
4711 | } | |
4712 | ||
ed29c0ca JB |
4713 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4714 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4715 | /* | |
4716 | * This can move first+target if the target bucket moves | |
4717 | * to the new extent. | |
4718 | */ | |
01225596 TM |
4719 | ret = ocfs2_add_new_xattr_cluster(inode, |
4720 | xb_bh, | |
ed29c0ca JB |
4721 | first, |
4722 | target, | |
01225596 TM |
4723 | &num_clusters, |
4724 | e_cpos, | |
78f30c31 TM |
4725 | &extend, |
4726 | ctxt); | |
01225596 TM |
4727 | if (ret) { |
4728 | mlog_errno(ret); | |
4729 | goto out; | |
4730 | } | |
4731 | } | |
4732 | ||
92de109a | 4733 | if (extend) { |
01225596 | 4734 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4735 | ctxt->handle, |
ed29c0ca JB |
4736 | first, |
4737 | bucket_blkno(target), | |
01225596 | 4738 | num_clusters); |
92de109a JB |
4739 | if (ret) |
4740 | mlog_errno(ret); | |
4741 | } | |
4742 | ||
01225596 | 4743 | out: |
92de109a | 4744 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4745 | |
01225596 TM |
4746 | return ret; |
4747 | } | |
4748 | ||
4749 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4750 | struct ocfs2_xattr_bucket *bucket, | |
4751 | int offs) | |
4752 | { | |
4753 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4754 | ||
4755 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4756 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4757 | } |
4758 | ||
4759 | /* | |
4760 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4761 | * |
4762 | * Note: "local" indicates the real data's locality. So we can't | |
4763 | * just its bucket locality by its length. | |
4764 | */ | |
4765 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4766 | struct ocfs2_xattr_info *xi, | |
4767 | struct ocfs2_xattr_search *xs, | |
4768 | u32 name_hash, | |
5a095611 | 4769 | int local) |
01225596 TM |
4770 | { |
4771 | struct ocfs2_xattr_entry *last, *xe; | |
4772 | int name_len = strlen(xi->name); | |
4773 | struct ocfs2_xattr_header *xh = xs->header; | |
4774 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4775 | size_t blocksize = inode->i_sb->s_blocksize; | |
4776 | char *val; | |
4777 | size_t offs, size, new_size; | |
4778 | ||
4779 | last = &xh->xh_entries[count]; | |
4780 | if (!xs->not_found) { | |
4781 | xe = xs->here; | |
4782 | offs = le16_to_cpu(xe->xe_name_offset); | |
4783 | if (ocfs2_xattr_is_local(xe)) | |
4784 | size = OCFS2_XATTR_SIZE(name_len) + | |
4785 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4786 | else | |
4787 | size = OCFS2_XATTR_SIZE(name_len) + | |
4788 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4789 | ||
4790 | /* | |
4791 | * If the new value will be stored outside, xi->value has been | |
4792 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4793 | * goes with xi->value_len, so we can set new_size safely here. | |
4794 | * See ocfs2_xattr_set_in_bucket. | |
4795 | */ | |
4796 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4797 | OCFS2_XATTR_SIZE(xi->value_len); | |
4798 | ||
4799 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4800 | if (xi->value) { | |
4801 | if (new_size > size) | |
4802 | goto set_new_name_value; | |
4803 | ||
4804 | /* Now replace the old value with new one. */ | |
4805 | if (local) | |
4806 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4807 | else | |
4808 | xe->xe_value_size = 0; | |
4809 | ||
4810 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4811 | xs->bucket, offs); |
01225596 TM |
4812 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4813 | size - OCFS2_XATTR_SIZE(name_len)); | |
4814 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4815 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4816 | xi->value, xi->value_len); | |
4817 | ||
4818 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4819 | ocfs2_xattr_set_local(xe, local); | |
4820 | return; | |
4821 | } else { | |
5a095611 TM |
4822 | /* |
4823 | * Remove the old entry if there is more than one. | |
4824 | * We don't remove the last entry so that we can | |
4825 | * use it to indicate the hash value of the empty | |
4826 | * bucket. | |
4827 | */ | |
01225596 | 4828 | last -= 1; |
01225596 | 4829 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4830 | if (xh->xh_count) { |
4831 | memmove(xe, xe + 1, | |
4832 | (void *)last - (void *)xe); | |
4833 | memset(last, 0, | |
4834 | sizeof(struct ocfs2_xattr_entry)); | |
4835 | } else | |
4836 | xh->xh_free_start = | |
4837 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4838 | ||
01225596 TM |
4839 | return; |
4840 | } | |
4841 | } else { | |
4842 | /* find a new entry for insert. */ | |
4843 | int low = 0, high = count - 1, tmp; | |
4844 | struct ocfs2_xattr_entry *tmp_xe; | |
4845 | ||
5a095611 | 4846 | while (low <= high && count) { |
01225596 TM |
4847 | tmp = (low + high) / 2; |
4848 | tmp_xe = &xh->xh_entries[tmp]; | |
4849 | ||
4850 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4851 | low = tmp + 1; | |
4852 | else if (name_hash < | |
4853 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4854 | high = tmp - 1; | |
06b240d8 TM |
4855 | else { |
4856 | low = tmp; | |
01225596 | 4857 | break; |
06b240d8 | 4858 | } |
01225596 TM |
4859 | } |
4860 | ||
4861 | xe = &xh->xh_entries[low]; | |
4862 | if (low != count) | |
4863 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4864 | ||
4865 | le16_add_cpu(&xh->xh_count, 1); | |
4866 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4867 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4868 | xe->xe_name_len = name_len; | |
4869 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4870 | } | |
4871 | ||
4872 | set_new_name_value: | |
4873 | /* Insert the new name+value. */ | |
4874 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4875 | ||
4876 | /* | |
4877 | * We must make sure that the name/value pair | |
4878 | * exists in the same block. | |
4879 | */ | |
4880 | offs = le16_to_cpu(xh->xh_free_start); | |
4881 | start = offs - size; | |
4882 | ||
4883 | if (start >> inode->i_sb->s_blocksize_bits != | |
4884 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4885 | offs = offs - offs % blocksize; | |
4886 | xh->xh_free_start = cpu_to_le16(offs); | |
4887 | } | |
4888 | ||
ba937127 | 4889 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4890 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4891 | ||
4892 | memset(val, 0, size); | |
4893 | memcpy(val, xi->name, name_len); | |
4894 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4895 | ||
4896 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4897 | ocfs2_xattr_set_local(xe, local); | |
4898 | xs->here = xe; | |
4899 | le16_add_cpu(&xh->xh_free_start, -size); | |
4900 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4901 | ||
4902 | return; | |
4903 | } | |
4904 | ||
01225596 TM |
4905 | /* |
4906 | * Set the xattr entry in the specified bucket. | |
4907 | * The bucket is indicated by xs->bucket and it should have the enough | |
4908 | * space for the xattr insertion. | |
4909 | */ | |
4910 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4911 | handle_t *handle, |
01225596 TM |
4912 | struct ocfs2_xattr_info *xi, |
4913 | struct ocfs2_xattr_search *xs, | |
4914 | u32 name_hash, | |
5a095611 | 4915 | int local) |
01225596 | 4916 | { |
1224be02 | 4917 | int ret; |
02dbf38d | 4918 | u64 blkno; |
01225596 | 4919 | |
ff1ec20e MF |
4920 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4921 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4922 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4923 | |
ba937127 | 4924 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4925 | blkno = bucket_blkno(xs->bucket); |
4926 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4927 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4928 | if (ret) { |
4929 | mlog_errno(ret); | |
4930 | goto out; | |
4931 | } | |
4932 | } | |
4933 | ||
ba937127 | 4934 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4935 | OCFS2_JOURNAL_ACCESS_WRITE); |
4936 | if (ret < 0) { | |
4937 | mlog_errno(ret); | |
4938 | goto out; | |
01225596 TM |
4939 | } |
4940 | ||
5a095611 | 4941 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4942 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4943 | |
01225596 | 4944 | out: |
01225596 TM |
4945 | return ret; |
4946 | } | |
4947 | ||
01225596 TM |
4948 | /* |
4949 | * Truncate the specified xe_off entry in xattr bucket. | |
4950 | * bucket is indicated by header_bh and len is the new length. | |
4951 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4952 | * | |
4953 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4954 | */ | |
4955 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4956 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4957 | int xe_off, |
78f30c31 TM |
4958 | int len, |
4959 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4960 | { |
4961 | int ret, offset; | |
4962 | u64 value_blk; | |
01225596 | 4963 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4964 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4965 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4966 | struct ocfs2_xattr_value_buf vb = { |
4967 | .vb_access = ocfs2_journal_access, | |
4968 | }; | |
01225596 TM |
4969 | |
4970 | xe = &xh->xh_entries[xe_off]; | |
4971 | ||
4972 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4973 | ||
4974 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4975 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4976 | ||
4977 | value_blk = offset / blocksize; | |
4978 | ||
4979 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4980 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4981 | |
b3e5d379 JB |
4982 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4983 | BUG_ON(!vb.vb_bh); | |
01225596 | 4984 | |
b3e5d379 JB |
4985 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4986 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4987 | |
548b0f22 JB |
4988 | /* |
4989 | * From here on out we have to dirty the bucket. The generic | |
4990 | * value calls only modify one of the bucket's bhs, but we need | |
4991 | * to send the bucket at once. So if they error, they *could* have | |
4992 | * modified something. We have to assume they did, and dirty | |
4993 | * the whole bucket. This leaves us in a consistent state. | |
4994 | */ | |
4995 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4996 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4997 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4998 | if (ret) { |
4999 | mlog_errno(ret); | |
554e7f9e TM |
5000 | goto out; |
5001 | } | |
5002 | ||
5003 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5004 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5005 | if (ret) { | |
5006 | mlog_errno(ret); | |
5007 | goto out; | |
01225596 TM |
5008 | } |
5009 | ||
548b0f22 JB |
5010 | xe->xe_value_size = cpu_to_le64(len); |
5011 | ||
548b0f22 JB |
5012 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5013 | ||
01225596 | 5014 | out: |
01225596 TM |
5015 | return ret; |
5016 | } | |
5017 | ||
5018 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
5019 | struct ocfs2_xattr_search *xs, |
5020 | int len, | |
5021 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5022 | { |
5023 | int ret, offset; | |
5024 | struct ocfs2_xattr_entry *xe = xs->here; | |
5025 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
5026 | ||
ba937127 | 5027 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
5028 | |
5029 | offset = xe - xh->xh_entries; | |
548b0f22 | 5030 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 5031 | offset, len, ctxt); |
01225596 TM |
5032 | if (ret) |
5033 | mlog_errno(ret); | |
5034 | ||
5035 | return ret; | |
5036 | } | |
5037 | ||
5038 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 5039 | handle_t *handle, |
01225596 TM |
5040 | struct ocfs2_xattr_search *xs, |
5041 | char *val, | |
5042 | int value_len) | |
5043 | { | |
712e53e4 | 5044 | int ret, offset, block_off; |
01225596 TM |
5045 | struct ocfs2_xattr_value_root *xv; |
5046 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
5047 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
5048 | void *base; | |
492a8a33 TM |
5049 | struct ocfs2_xattr_value_buf vb = { |
5050 | .vb_access = ocfs2_journal_access, | |
5051 | }; | |
01225596 TM |
5052 | |
5053 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
5054 | ||
fd68a894 | 5055 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, xh, |
712e53e4 TM |
5056 | xe - xh->xh_entries, |
5057 | &block_off, | |
5058 | &offset); | |
5059 | if (ret) { | |
5060 | mlog_errno(ret); | |
5061 | goto out; | |
5062 | } | |
01225596 | 5063 | |
712e53e4 TM |
5064 | base = bucket_block(xs->bucket, block_off); |
5065 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
5066 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 5067 | |
492a8a33 TM |
5068 | vb.vb_xv = xv; |
5069 | vb.vb_bh = xs->bucket->bu_bhs[block_off]; | |
712e53e4 | 5070 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
492a8a33 | 5071 | &vb, val, value_len); |
712e53e4 TM |
5072 | if (ret) |
5073 | mlog_errno(ret); | |
5074 | out: | |
5075 | return ret; | |
01225596 TM |
5076 | } |
5077 | ||
01225596 TM |
5078 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5079 | struct buffer_head *root_bh, | |
5080 | u64 blkno, | |
5081 | u32 cpos, | |
47bca495 TM |
5082 | u32 len, |
5083 | void *para) | |
01225596 TM |
5084 | { |
5085 | int ret; | |
5086 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5087 | struct inode *tl_inode = osb->osb_tl_inode; | |
5088 | handle_t *handle; | |
5089 | struct ocfs2_xattr_block *xb = | |
5090 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5091 | struct ocfs2_alloc_context *meta_ac = NULL; |
5092 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5093 | struct ocfs2_extent_tree et; |
5094 | ||
47bca495 | 5095 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5096 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5097 | if (ret) { |
5098 | mlog_errno(ret); | |
5099 | return ret; | |
5100 | } | |
5101 | ||
5e404e9e | 5102 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5103 | |
5104 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5105 | ||
5106 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
5107 | cpos, len, (unsigned long long)blkno); | |
5108 | ||
8cb471e8 JB |
5109 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5110 | len); | |
01225596 | 5111 | |
f99b9b7c | 5112 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5113 | if (ret) { |
5114 | mlog_errno(ret); | |
5115 | return ret; | |
5116 | } | |
5117 | ||
5118 | mutex_lock(&tl_inode->i_mutex); | |
5119 | ||
5120 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5121 | ret = __ocfs2_flush_truncate_log(osb); | |
5122 | if (ret < 0) { | |
5123 | mlog_errno(ret); | |
5124 | goto out; | |
5125 | } | |
5126 | } | |
5127 | ||
a90714c1 | 5128 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5129 | if (IS_ERR(handle)) { |
01225596 TM |
5130 | ret = -ENOMEM; |
5131 | mlog_errno(ret); | |
5132 | goto out; | |
5133 | } | |
5134 | ||
0cf2f763 | 5135 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5136 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5137 | if (ret) { |
5138 | mlog_errno(ret); | |
5139 | goto out_commit; | |
5140 | } | |
5141 | ||
dbdcf6a4 | 5142 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5143 | &dealloc); |
01225596 TM |
5144 | if (ret) { |
5145 | mlog_errno(ret); | |
5146 | goto out_commit; | |
5147 | } | |
5148 | ||
5149 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
5150 | ||
5151 | ret = ocfs2_journal_dirty(handle, root_bh); | |
5152 | if (ret) { | |
5153 | mlog_errno(ret); | |
5154 | goto out_commit; | |
5155 | } | |
5156 | ||
5157 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5158 | if (ret) | |
5159 | mlog_errno(ret); | |
5160 | ||
5161 | out_commit: | |
5162 | ocfs2_commit_trans(osb, handle); | |
5163 | out: | |
5164 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5165 | ||
5166 | mutex_unlock(&tl_inode->i_mutex); | |
5167 | ||
5168 | if (meta_ac) | |
5169 | ocfs2_free_alloc_context(meta_ac); | |
5170 | ||
5171 | ocfs2_run_deallocs(osb, &dealloc); | |
5172 | ||
5173 | return ret; | |
5174 | } | |
5175 | ||
01225596 | 5176 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 5177 | handle_t *handle, |
01225596 TM |
5178 | struct ocfs2_xattr_search *xs) |
5179 | { | |
ba937127 | 5180 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
5181 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
5182 | le16_to_cpu(xh->xh_count) - 1]; | |
5183 | int ret = 0; | |
5184 | ||
ba937127 | 5185 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 5186 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5187 | if (ret) { |
5188 | mlog_errno(ret); | |
85db90e7 | 5189 | return; |
01225596 TM |
5190 | } |
5191 | ||
5192 | /* Remove the old entry. */ | |
5193 | memmove(xs->here, xs->here + 1, | |
5194 | (void *)last - (void *)xs->here); | |
5195 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
5196 | le16_add_cpu(&xh->xh_count, -1); | |
5197 | ||
ba937127 | 5198 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
5199 | } |
5200 | ||
5201 | /* | |
5202 | * Set the xattr name/value in the bucket specified in xs. | |
5203 | * | |
5204 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
5205 | * we divide the whole process into 3 steps: | |
5206 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
5207 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
5208 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
5209 | * 4. If the clusters for the new outside value can't be allocated, we need | |
5210 | * to free the xattr we allocated in set. | |
5211 | */ | |
5212 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
5213 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5214 | struct ocfs2_xattr_search *xs, |
5215 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5216 | { |
5a095611 | 5217 | int ret, local = 1; |
01225596 TM |
5218 | size_t value_len; |
5219 | char *val = (char *)xi->value; | |
5220 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
5221 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
5222 | strlen(xi->name)); | |
01225596 TM |
5223 | |
5224 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
5225 | /* | |
5226 | * We need to truncate the xattr storage first. | |
5227 | * | |
5228 | * If both the old and new value are stored to | |
5229 | * outside block, we only need to truncate | |
5230 | * the storage and then set the value outside. | |
5231 | * | |
5232 | * If the new value should be stored within block, | |
5233 | * we should free all the outside block first and | |
5234 | * the modification to the xattr block will be done | |
5235 | * by following steps. | |
5236 | */ | |
5237 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5238 | value_len = xi->value_len; | |
5239 | else | |
5240 | value_len = 0; | |
5241 | ||
5242 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
5243 | value_len, |
5244 | ctxt); | |
01225596 TM |
5245 | if (ret) |
5246 | goto out; | |
5247 | ||
5248 | if (value_len) | |
5249 | goto set_value_outside; | |
5250 | } | |
5251 | ||
5252 | value_len = xi->value_len; | |
5253 | /* So we have to handle the inside block change now. */ | |
5254 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
5255 | /* | |
5256 | * If the new value will be stored outside of block, | |
5257 | * initalize a new empty value root and insert it first. | |
5258 | */ | |
5259 | local = 0; | |
5260 | xi->value = &def_xv; | |
5261 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
5262 | } | |
5263 | ||
85db90e7 TM |
5264 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5265 | name_hash, local); | |
01225596 TM |
5266 | if (ret) { |
5267 | mlog_errno(ret); | |
5268 | goto out; | |
5269 | } | |
5270 | ||
5a095611 TM |
5271 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5272 | goto out; | |
01225596 | 5273 | |
5a095611 TM |
5274 | /* allocate the space now for the outside block storage. */ |
5275 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5276 | value_len, ctxt); |
5a095611 TM |
5277 | if (ret) { |
5278 | mlog_errno(ret); | |
5279 | ||
5280 | if (xs->not_found) { | |
5281 | /* | |
5282 | * We can't allocate enough clusters for outside | |
5283 | * storage and we have allocated xattr already, | |
5284 | * so need to remove it. | |
5285 | */ | |
85db90e7 | 5286 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5287 | } |
01225596 TM |
5288 | goto out; |
5289 | } | |
5290 | ||
5291 | set_value_outside: | |
85db90e7 TM |
5292 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5293 | xs, val, value_len); | |
01225596 TM |
5294 | out: |
5295 | return ret; | |
5296 | } | |
5297 | ||
80bcaf34 TM |
5298 | /* |
5299 | * check whether the xattr bucket is filled up with the same hash value. | |
5300 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5301 | * If we want to insert a xattr with different hash value, go ahead | |
5302 | * and ocfs2_divide_xattr_bucket will handle this. | |
5303 | */ | |
01225596 | 5304 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5305 | struct ocfs2_xattr_bucket *bucket, |
5306 | const char *name) | |
01225596 | 5307 | { |
3e632946 | 5308 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5309 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5310 | ||
5311 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5312 | return 0; | |
01225596 TM |
5313 | |
5314 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5315 | xh->xh_entries[0].xe_name_hash) { | |
5316 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5317 | "hash = %u\n", | |
9c7759aa | 5318 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5319 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5320 | return -ENOSPC; | |
5321 | } | |
5322 | ||
5323 | return 0; | |
5324 | } | |
5325 | ||
5326 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5327 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5328 | struct ocfs2_xattr_search *xs, |
5329 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5330 | { |
5331 | struct ocfs2_xattr_header *xh; | |
5332 | struct ocfs2_xattr_entry *xe; | |
5333 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5334 | int free, max_free, need, old; |
01225596 TM |
5335 | size_t value_size = 0, name_len = strlen(xi->name); |
5336 | size_t blocksize = inode->i_sb->s_blocksize; | |
5337 | int ret, allocation = 0; | |
01225596 TM |
5338 | |
5339 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5340 | ||
5341 | try_again: | |
5342 | xh = xs->header; | |
5343 | count = le16_to_cpu(xh->xh_count); | |
5344 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5345 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5346 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5347 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5348 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5349 | |
5350 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5351 | "of %u which exceed block size\n", | |
ba937127 | 5352 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5353 | header_size); |
5354 | ||
5355 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5356 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5357 | else if (xi->value) | |
5358 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5359 | ||
5360 | if (xs->not_found) | |
5361 | need = sizeof(struct ocfs2_xattr_entry) + | |
5362 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5363 | else { | |
5364 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5365 | ||
5366 | /* | |
5367 | * We only replace the old value if the new length is smaller | |
5368 | * than the old one. Otherwise we will allocate new space in the | |
5369 | * bucket to store it. | |
5370 | */ | |
5371 | xe = xs->here; | |
5372 | if (ocfs2_xattr_is_local(xe)) | |
5373 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5374 | else | |
5375 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5376 | ||
5377 | if (old >= value_size) | |
5378 | need = 0; | |
5379 | } | |
5380 | ||
4442f518 | 5381 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5382 | /* |
5383 | * We need to make sure the new name/value pair | |
5384 | * can exist in the same block. | |
5385 | */ | |
5386 | if (xh_free_start % blocksize < need) | |
5387 | free -= xh_free_start % blocksize; | |
5388 | ||
5389 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5390 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5391 | " %u\n", xs->not_found, | |
ba937127 | 5392 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5393 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5394 | le16_to_cpu(xh->xh_name_value_len)); | |
5395 | ||
976331d8 TM |
5396 | if (free < need || |
5397 | (xs->not_found && | |
5398 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5399 | if (need <= max_free && |
5400 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5401 | /* | |
5402 | * We can create the space by defragment. Since only the | |
5403 | * name/value will be moved, the xe shouldn't be changed | |
5404 | * in xs. | |
5405 | */ | |
85db90e7 TM |
5406 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5407 | xs->bucket); | |
01225596 TM |
5408 | if (ret) { |
5409 | mlog_errno(ret); | |
5410 | goto out; | |
5411 | } | |
5412 | ||
5413 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5414 | free = xh_free_start - header_size |
5415 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5416 | if (xh_free_start % blocksize < need) |
5417 | free -= xh_free_start % blocksize; | |
5418 | ||
5419 | if (free >= need) | |
5420 | goto xattr_set; | |
5421 | ||
5422 | mlog(0, "Can't get enough space for xattr insert by " | |
5423 | "defragment. Need %u bytes, but we have %d, so " | |
5424 | "allocate new bucket for it.\n", need, free); | |
5425 | } | |
5426 | ||
5427 | /* | |
5428 | * We have to add new buckets or clusters and one | |
5429 | * allocation should leave us enough space for insert. | |
5430 | */ | |
5431 | BUG_ON(allocation); | |
5432 | ||
5433 | /* | |
5434 | * We do not allow for overlapping ranges between buckets. And | |
5435 | * the maximum number of collisions we will allow for then is | |
5436 | * one bucket's worth, so check it here whether we need to | |
5437 | * add a new bucket for the insert. | |
5438 | */ | |
80bcaf34 | 5439 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5440 | xs->bucket, |
80bcaf34 | 5441 | xi->name); |
01225596 TM |
5442 | if (ret) { |
5443 | mlog_errno(ret); | |
5444 | goto out; | |
5445 | } | |
5446 | ||
5447 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5448 | xs->xattr_bh, | |
91f2033f | 5449 | xs->bucket, |
78f30c31 | 5450 | ctxt); |
01225596 TM |
5451 | if (ret) { |
5452 | mlog_errno(ret); | |
5453 | goto out; | |
5454 | } | |
5455 | ||
91f2033f JB |
5456 | /* |
5457 | * ocfs2_add_new_xattr_bucket() will have updated | |
5458 | * xs->bucket if it moved, but it will not have updated | |
5459 | * any of the other search fields. Thus, we drop it and | |
5460 | * re-search. Everything should be cached, so it'll be | |
5461 | * quick. | |
5462 | */ | |
ba937127 | 5463 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5464 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5465 | xi->name_index, | |
5466 | xi->name, xs); | |
5467 | if (ret && ret != -ENODATA) | |
5468 | goto out; | |
5469 | xs->not_found = ret; | |
5470 | allocation = 1; | |
5471 | goto try_again; | |
5472 | } | |
5473 | ||
5474 | xattr_set: | |
78f30c31 | 5475 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5476 | out: |
5477 | mlog_exit(ret); | |
5478 | return ret; | |
5479 | } | |
a3944256 TM |
5480 | |
5481 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5482 | struct ocfs2_xattr_bucket *bucket, | |
5483 | void *para) | |
5484 | { | |
ce9c5a54 | 5485 | int ret = 0, ref_credits; |
3e632946 | 5486 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5487 | u16 i; |
5488 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5489 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5490 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5491 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5492 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5493 | struct ocfs2_xattr_value_root *xv; |
5494 | struct ocfs2_rm_xattr_bucket_para *args = | |
5495 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5496 | |
5497 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5498 | |
5499 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5500 | xe = &xh->xh_entries[i]; | |
5501 | if (ocfs2_xattr_is_local(xe)) | |
5502 | continue; | |
5503 | ||
ce9c5a54 TM |
5504 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5505 | i, &xv, NULL); | |
5506 | ||
5507 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5508 | args->ref_ci, | |
5509 | args->ref_root_bh, | |
5510 | &ctxt.meta_ac, | |
5511 | &ref_credits); | |
5512 | ||
5513 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5514 | if (IS_ERR(ctxt.handle)) { |
5515 | ret = PTR_ERR(ctxt.handle); | |
5516 | mlog_errno(ret); | |
5517 | break; | |
5518 | } | |
5519 | ||
548b0f22 | 5520 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5521 | i, 0, &ctxt); |
88c3b062 TM |
5522 | |
5523 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5524 | if (ctxt.meta_ac) { |
5525 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5526 | ctxt.meta_ac = NULL; | |
5527 | } | |
a3944256 TM |
5528 | if (ret) { |
5529 | mlog_errno(ret); | |
5530 | break; | |
5531 | } | |
5532 | } | |
5533 | ||
ce9c5a54 TM |
5534 | if (ctxt.meta_ac) |
5535 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5536 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5537 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5538 | return ret; |
5539 | } | |
5540 | ||
492a8a33 TM |
5541 | /* |
5542 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5543 | * or change the extent record flag), we need to recalculate | |
5544 | * the metaecc for the whole bucket. So it is done here. | |
5545 | * | |
5546 | * Note: | |
5547 | * We have to give the extra credits for the caller. | |
5548 | */ | |
5549 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5550 | handle_t *handle, | |
5551 | void *para) | |
5552 | { | |
5553 | int ret; | |
5554 | struct ocfs2_xattr_bucket *bucket = | |
5555 | (struct ocfs2_xattr_bucket *)para; | |
5556 | ||
5557 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5558 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5559 | if (ret) { | |
5560 | mlog_errno(ret); | |
5561 | return ret; | |
5562 | } | |
5563 | ||
5564 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5565 | ||
5566 | return 0; | |
5567 | } | |
5568 | ||
5569 | /* | |
5570 | * Special action we need if the xattr value is refcounted. | |
5571 | * | |
5572 | * 1. If the xattr is refcounted, lock the tree. | |
5573 | * 2. CoW the xattr if we are setting the new value and the value | |
5574 | * will be stored outside. | |
5575 | * 3. In other case, decrease_refcount will work for us, so just | |
5576 | * lock the refcount tree, calculate the meta and credits is OK. | |
5577 | * | |
5578 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5579 | * currently CoW is a completed transaction, while this function | |
5580 | * will also lock the allocators and let us deadlock. So we will | |
5581 | * CoW the whole xattr value. | |
5582 | */ | |
5583 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5584 | struct ocfs2_dinode *di, | |
5585 | struct ocfs2_xattr_info *xi, | |
5586 | struct ocfs2_xattr_search *xis, | |
5587 | struct ocfs2_xattr_search *xbs, | |
5588 | struct ocfs2_refcount_tree **ref_tree, | |
5589 | int *meta_add, | |
5590 | int *credits) | |
5591 | { | |
5592 | int ret = 0; | |
5593 | struct ocfs2_xattr_block *xb; | |
5594 | struct ocfs2_xattr_entry *xe; | |
5595 | char *base; | |
5596 | u32 p_cluster, num_clusters; | |
5597 | unsigned int ext_flags; | |
5598 | int name_offset, name_len; | |
5599 | struct ocfs2_xattr_value_buf vb; | |
5600 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5601 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5602 | struct ocfs2_post_refcount refcount; | |
5603 | struct ocfs2_post_refcount *p = NULL; | |
5604 | struct buffer_head *ref_root_bh = NULL; | |
5605 | ||
5606 | if (!xis->not_found) { | |
5607 | xe = xis->here; | |
5608 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5609 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5610 | base = xis->base; | |
5611 | vb.vb_bh = xis->inode_bh; | |
5612 | vb.vb_access = ocfs2_journal_access_di; | |
5613 | } else { | |
5614 | int i, block_off = 0; | |
5615 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5616 | xe = xbs->here; | |
5617 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5618 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5619 | i = xbs->here - xbs->header->xh_entries; | |
5620 | ||
5621 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5622 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5623 | bucket_xh(xbs->bucket), |
5624 | i, &block_off, | |
5625 | &name_offset); | |
5626 | if (ret) { | |
5627 | mlog_errno(ret); | |
5628 | goto out; | |
5629 | } | |
5630 | base = bucket_block(xbs->bucket, block_off); | |
5631 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5632 | vb.vb_access = ocfs2_journal_access; | |
5633 | ||
5634 | if (ocfs2_meta_ecc(osb)) { | |
5635 | /*create parameters for ocfs2_post_refcount. */ | |
5636 | bucket = xbs->bucket; | |
5637 | refcount.credits = bucket->bu_blocks; | |
5638 | refcount.para = bucket; | |
5639 | refcount.func = | |
5640 | ocfs2_xattr_bucket_post_refcount; | |
5641 | p = &refcount; | |
5642 | } | |
5643 | } else { | |
5644 | base = xbs->base; | |
5645 | vb.vb_bh = xbs->xattr_bh; | |
5646 | vb.vb_access = ocfs2_journal_access_xb; | |
5647 | } | |
5648 | } | |
5649 | ||
5650 | if (ocfs2_xattr_is_local(xe)) | |
5651 | goto out; | |
5652 | ||
5653 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5654 | (base + name_offset + name_len); | |
5655 | ||
5656 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5657 | &num_clusters, &vb.vb_xv->xr_list, | |
5658 | &ext_flags); | |
5659 | if (ret) { | |
5660 | mlog_errno(ret); | |
5661 | goto out; | |
5662 | } | |
5663 | ||
5664 | /* | |
5665 | * We just need to check the 1st extent record, since we always | |
5666 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5667 | * some REFCOUNT extent recs after the 1st one. | |
5668 | */ | |
5669 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5670 | goto out; | |
5671 | ||
5672 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5673 | 1, ref_tree, &ref_root_bh); | |
5674 | if (ret) { | |
5675 | mlog_errno(ret); | |
5676 | goto out; | |
5677 | } | |
5678 | ||
5679 | /* | |
5680 | * If we are deleting the xattr or the new size will be stored inside, | |
5681 | * cool, leave it there, the xattr truncate process will remove them | |
5682 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5683 | * And the worse case is that every cluster truncate will split the | |
5684 | * refcount tree, and make the original extent become 3. So we will need | |
5685 | * 2 * cluster more extent recs at most. | |
5686 | */ | |
5687 | if (!xi->value || xi->value_len <= OCFS2_XATTR_INLINE_SIZE) { | |
5688 | ||
5689 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5690 | &(*ref_tree)->rf_ci, | |
5691 | ref_root_bh, vb.vb_xv, | |
5692 | meta_add, credits); | |
5693 | if (ret) | |
5694 | mlog_errno(ret); | |
5695 | goto out; | |
5696 | } | |
5697 | ||
5698 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5699 | *ref_tree, ref_root_bh, 0, | |
5700 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5701 | if (ret) | |
5702 | mlog_errno(ret); | |
5703 | ||
5704 | out: | |
5705 | brelse(ref_root_bh); | |
5706 | return ret; | |
5707 | } | |
5708 | ||
0129241e TM |
5709 | /* |
5710 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5711 | * The physical clusters will be added to refcount tree. | |
5712 | */ | |
5713 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5714 | struct ocfs2_xattr_value_root *xv, | |
5715 | struct ocfs2_extent_tree *value_et, | |
5716 | struct ocfs2_caching_info *ref_ci, | |
5717 | struct buffer_head *ref_root_bh, | |
5718 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5719 | struct ocfs2_post_refcount *refcount) | |
5720 | { | |
5721 | int ret = 0; | |
5722 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5723 | u32 cpos, p_cluster, num_clusters; | |
5724 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5725 | unsigned int ext_flags; | |
5726 | ||
5727 | cpos = 0; | |
5728 | while (cpos < clusters) { | |
5729 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5730 | &num_clusters, el, &ext_flags); | |
5731 | ||
5732 | cpos += num_clusters; | |
5733 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5734 | continue; | |
5735 | ||
5736 | BUG_ON(!p_cluster); | |
5737 | ||
5738 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5739 | ref_ci, ref_root_bh, | |
5740 | cpos - num_clusters, | |
5741 | p_cluster, num_clusters, | |
5742 | dealloc, refcount); | |
5743 | if (ret) { | |
5744 | mlog_errno(ret); | |
5745 | break; | |
5746 | } | |
5747 | } | |
5748 | ||
5749 | return ret; | |
5750 | } | |
5751 | ||
5752 | /* | |
5753 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5754 | * have value stored outside. | |
5755 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5756 | */ | |
5757 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5758 | struct ocfs2_xattr_value_buf *vb, | |
5759 | struct ocfs2_xattr_header *header, | |
5760 | struct ocfs2_caching_info *ref_ci, | |
5761 | struct buffer_head *ref_root_bh, | |
5762 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5763 | { | |
5764 | ||
5765 | struct ocfs2_xattr_entry *xe; | |
5766 | struct ocfs2_xattr_value_root *xv; | |
5767 | struct ocfs2_extent_tree et; | |
5768 | int i, ret = 0; | |
5769 | ||
5770 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5771 | xe = &header->xh_entries[i]; | |
5772 | ||
5773 | if (ocfs2_xattr_is_local(xe)) | |
5774 | continue; | |
5775 | ||
5776 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5777 | le16_to_cpu(xe->xe_name_offset) + | |
5778 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5779 | ||
5780 | vb->vb_xv = xv; | |
5781 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5782 | ||
5783 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5784 | ref_ci, ref_root_bh, | |
5785 | dealloc, NULL); | |
5786 | if (ret) { | |
5787 | mlog_errno(ret); | |
5788 | break; | |
5789 | } | |
5790 | } | |
5791 | ||
5792 | return ret; | |
5793 | } | |
5794 | ||
5795 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5796 | struct buffer_head *fe_bh, | |
5797 | struct ocfs2_caching_info *ref_ci, | |
5798 | struct buffer_head *ref_root_bh, | |
5799 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5800 | { | |
5801 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5802 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5803 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5804 | le16_to_cpu(di->i_xattr_inline_size)); | |
5805 | struct ocfs2_xattr_value_buf vb = { | |
5806 | .vb_bh = fe_bh, | |
5807 | .vb_access = ocfs2_journal_access_di, | |
5808 | }; | |
5809 | ||
5810 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5811 | ref_ci, ref_root_bh, dealloc); | |
5812 | } | |
5813 | ||
5814 | struct ocfs2_xattr_tree_value_refcount_para { | |
5815 | struct ocfs2_caching_info *ref_ci; | |
5816 | struct buffer_head *ref_root_bh; | |
5817 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
5818 | }; | |
5819 | ||
5820 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
5821 | struct ocfs2_xattr_bucket *bucket, | |
5822 | int offset, | |
5823 | struct ocfs2_xattr_value_root **xv, | |
5824 | struct buffer_head **bh) | |
5825 | { | |
5826 | int ret, block_off, name_offset; | |
5827 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
5828 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
5829 | void *base; | |
5830 | ||
5831 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
5832 | bucket_xh(bucket), | |
5833 | offset, | |
5834 | &block_off, | |
5835 | &name_offset); | |
5836 | if (ret) { | |
5837 | mlog_errno(ret); | |
5838 | goto out; | |
5839 | } | |
5840 | ||
5841 | base = bucket_block(bucket, block_off); | |
5842 | ||
5843 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
5844 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5845 | ||
5846 | if (bh) | |
5847 | *bh = bucket->bu_bhs[block_off]; | |
5848 | out: | |
5849 | return ret; | |
5850 | } | |
5851 | ||
5852 | /* | |
5853 | * For a given xattr bucket, refcount all the entries which | |
5854 | * have value stored outside. | |
5855 | */ | |
5856 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
5857 | struct ocfs2_xattr_bucket *bucket, | |
5858 | void *para) | |
5859 | { | |
5860 | int i, ret = 0; | |
5861 | struct ocfs2_extent_tree et; | |
5862 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
5863 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
5864 | struct ocfs2_xattr_header *xh = | |
5865 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
5866 | struct ocfs2_xattr_entry *xe; | |
5867 | struct ocfs2_xattr_value_buf vb = { | |
5868 | .vb_access = ocfs2_journal_access, | |
5869 | }; | |
5870 | struct ocfs2_post_refcount refcount = { | |
5871 | .credits = bucket->bu_blocks, | |
5872 | .para = bucket, | |
5873 | .func = ocfs2_xattr_bucket_post_refcount, | |
5874 | }; | |
5875 | struct ocfs2_post_refcount *p = NULL; | |
5876 | ||
5877 | /* We only need post_refcount if we support metaecc. */ | |
5878 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
5879 | p = &refcount; | |
5880 | ||
5881 | mlog(0, "refcount bucket %llu, count = %u\n", | |
5882 | (unsigned long long)bucket_blkno(bucket), | |
5883 | le16_to_cpu(xh->xh_count)); | |
5884 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5885 | xe = &xh->xh_entries[i]; | |
5886 | ||
5887 | if (ocfs2_xattr_is_local(xe)) | |
5888 | continue; | |
5889 | ||
5890 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
5891 | &vb.vb_xv, &vb.vb_bh); | |
5892 | if (ret) { | |
5893 | mlog_errno(ret); | |
5894 | break; | |
5895 | } | |
5896 | ||
5897 | ocfs2_init_xattr_value_extent_tree(&et, | |
5898 | INODE_CACHE(inode), &vb); | |
5899 | ||
5900 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
5901 | &et, ref->ref_ci, | |
5902 | ref->ref_root_bh, | |
5903 | ref->dealloc, p); | |
5904 | if (ret) { | |
5905 | mlog_errno(ret); | |
5906 | break; | |
5907 | } | |
5908 | } | |
5909 | ||
5910 | return ret; | |
5911 | ||
5912 | } | |
5913 | ||
5914 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
5915 | struct buffer_head *root_bh, | |
5916 | u64 blkno, u32 cpos, u32 len, void *para) | |
5917 | { | |
5918 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
5919 | ocfs2_xattr_bucket_value_refcount, | |
5920 | para); | |
5921 | } | |
5922 | ||
5923 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
5924 | struct buffer_head *blk_bh, | |
5925 | struct ocfs2_caching_info *ref_ci, | |
5926 | struct buffer_head *ref_root_bh, | |
5927 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5928 | { | |
5929 | int ret = 0; | |
5930 | struct ocfs2_xattr_block *xb = | |
5931 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
5932 | ||
5933 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
5934 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
5935 | struct ocfs2_xattr_value_buf vb = { | |
5936 | .vb_bh = blk_bh, | |
5937 | .vb_access = ocfs2_journal_access_xb, | |
5938 | }; | |
5939 | ||
5940 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5941 | ref_ci, ref_root_bh, | |
5942 | dealloc); | |
5943 | } else { | |
5944 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
5945 | .ref_ci = ref_ci, | |
5946 | .ref_root_bh = ref_root_bh, | |
5947 | .dealloc = dealloc, | |
5948 | }; | |
5949 | ||
5950 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
5951 | ocfs2_refcount_xattr_tree_rec, | |
5952 | ¶); | |
5953 | } | |
5954 | ||
5955 | return ret; | |
5956 | } | |
5957 | ||
5958 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
5959 | struct buffer_head *fe_bh, | |
5960 | struct ocfs2_caching_info *ref_ci, | |
5961 | struct buffer_head *ref_root_bh, | |
5962 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5963 | { | |
5964 | int ret = 0; | |
5965 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
5966 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5967 | struct buffer_head *blk_bh = NULL; | |
5968 | ||
5969 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
5970 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
5971 | ref_ci, ref_root_bh, | |
5972 | dealloc); | |
5973 | if (ret) { | |
5974 | mlog_errno(ret); | |
5975 | goto out; | |
5976 | } | |
5977 | } | |
5978 | ||
5979 | if (!di->i_xattr_loc) | |
5980 | goto out; | |
5981 | ||
5982 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
5983 | &blk_bh); | |
5984 | if (ret < 0) { | |
5985 | mlog_errno(ret); | |
5986 | goto out; | |
5987 | } | |
5988 | ||
5989 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
5990 | ref_root_bh, dealloc); | |
5991 | if (ret) | |
5992 | mlog_errno(ret); | |
5993 | ||
5994 | brelse(blk_bh); | |
5995 | out: | |
5996 | ||
5997 | return ret; | |
5998 | } | |
5999 | ||
0fe9b66c | 6000 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6001 | /* |
6002 | * Store the information we need in xattr reflink. | |
6003 | * old_bh and new_bh are inode bh for the old and new inode. | |
6004 | */ | |
6005 | struct ocfs2_xattr_reflink { | |
6006 | struct inode *old_inode; | |
6007 | struct inode *new_inode; | |
6008 | struct buffer_head *old_bh; | |
6009 | struct buffer_head *new_bh; | |
6010 | struct ocfs2_caching_info *ref_ci; | |
6011 | struct buffer_head *ref_root_bh; | |
6012 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6013 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6014 | }; |
6015 | ||
6016 | /* | |
6017 | * Given a xattr header and xe offset, | |
6018 | * return the proper xv and the corresponding bh. | |
6019 | * xattr in inode, block and xattr tree have different implementaions. | |
6020 | */ | |
6021 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6022 | struct buffer_head *bh, | |
6023 | struct ocfs2_xattr_header *xh, | |
6024 | int offset, | |
6025 | struct ocfs2_xattr_value_root **xv, | |
6026 | struct buffer_head **ret_bh, | |
6027 | void *para); | |
6028 | ||
6029 | /* | |
6030 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6031 | * credits we need if we create them from the scratch. | |
6032 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6033 | */ | |
6034 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6035 | struct buffer_head *bh, | |
6036 | struct ocfs2_xattr_header *xh, | |
6037 | int *metas, int *credits, | |
6038 | int *num_recs, | |
6039 | get_xattr_value_root *func, | |
6040 | void *para) | |
6041 | { | |
6042 | int i, ret = 0; | |
6043 | struct ocfs2_xattr_value_root *xv; | |
6044 | struct ocfs2_xattr_entry *xe; | |
6045 | ||
6046 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6047 | xe = &xh->xh_entries[i]; | |
6048 | if (ocfs2_xattr_is_local(xe)) | |
6049 | continue; | |
6050 | ||
6051 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6052 | if (ret) { | |
6053 | mlog_errno(ret); | |
6054 | break; | |
6055 | } | |
6056 | ||
6057 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6058 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6059 | ||
6060 | *credits += ocfs2_calc_extend_credits(sb, | |
6061 | &def_xv.xv.xr_list, | |
6062 | le32_to_cpu(xv->xr_clusters)); | |
6063 | ||
6064 | /* | |
6065 | * If the value is a tree with depth > 1, We don't go deep | |
6066 | * to the extent block, so just calculate a maximum record num. | |
6067 | */ | |
6068 | if (!xv->xr_list.l_tree_depth) | |
6069 | *num_recs += xv->xr_list.l_next_free_rec; | |
6070 | else | |
6071 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6072 | XATTR_SIZE_MAX); | |
6073 | } | |
6074 | ||
6075 | return ret; | |
6076 | } | |
6077 | ||
6078 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6079 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6080 | struct buffer_head *bh, | |
6081 | struct ocfs2_xattr_header *xh, | |
6082 | int offset, | |
6083 | struct ocfs2_xattr_value_root **xv, | |
6084 | struct buffer_head **ret_bh, | |
6085 | void *para) | |
6086 | { | |
6087 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6088 | ||
6089 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6090 | le16_to_cpu(xe->xe_name_offset) + | |
6091 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6092 | ||
6093 | if (ret_bh) | |
6094 | *ret_bh = bh; | |
6095 | ||
6096 | return 0; | |
6097 | } | |
6098 | ||
6099 | /* | |
6100 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6101 | * It is only used for inline xattr and xattr block. | |
6102 | */ | |
6103 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6104 | struct ocfs2_xattr_header *xh, | |
6105 | struct buffer_head *ref_root_bh, | |
6106 | int *credits, | |
6107 | struct ocfs2_alloc_context **meta_ac) | |
6108 | { | |
6109 | int ret, meta_add = 0, num_recs = 0; | |
6110 | struct ocfs2_refcount_block *rb = | |
6111 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6112 | ||
6113 | *credits = 0; | |
6114 | ||
6115 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6116 | &meta_add, credits, &num_recs, | |
6117 | ocfs2_get_xattr_value_root, | |
6118 | NULL); | |
6119 | if (ret) { | |
6120 | mlog_errno(ret); | |
6121 | goto out; | |
6122 | } | |
6123 | ||
6124 | /* | |
6125 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6126 | * an approximate number we need for refcount tree change. | |
6127 | * Sometimes we need to split the tree, and after split, half recs | |
6128 | * will be moved to the new block, and a new block can only provide | |
6129 | * half number of recs. So we multiple new blocks by 2. | |
6130 | */ | |
6131 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6132 | meta_add += num_recs; | |
6133 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6134 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6135 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6136 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6137 | else | |
6138 | *credits += 1; | |
6139 | ||
6140 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6141 | if (ret) | |
6142 | mlog_errno(ret); | |
6143 | ||
6144 | out: | |
6145 | return ret; | |
6146 | } | |
6147 | ||
6148 | /* | |
6149 | * Given a xattr header, reflink all the xattrs in this container. | |
6150 | * It can be used for inode, block and bucket. | |
6151 | * | |
6152 | * NOTE: | |
6153 | * Before we call this function, the caller has memcpy the xattr in | |
6154 | * old_xh to the new_xh. | |
0fe9b66c TM |
6155 | * |
6156 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6157 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6158 | */ |
6159 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6160 | struct ocfs2_xattr_reflink *args, | |
6161 | struct buffer_head *old_bh, | |
6162 | struct ocfs2_xattr_header *xh, | |
6163 | struct buffer_head *new_bh, | |
6164 | struct ocfs2_xattr_header *new_xh, | |
6165 | struct ocfs2_xattr_value_buf *vb, | |
6166 | struct ocfs2_alloc_context *meta_ac, | |
6167 | get_xattr_value_root *func, | |
6168 | void *para) | |
6169 | { | |
0fe9b66c | 6170 | int ret = 0, i, j; |
2999d12f TM |
6171 | struct super_block *sb = args->old_inode->i_sb; |
6172 | struct buffer_head *value_bh; | |
0fe9b66c | 6173 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6174 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6175 | struct ocfs2_extent_tree data_et; | |
6176 | u32 clusters, cpos, p_cluster, num_clusters; | |
6177 | unsigned int ext_flags = 0; | |
6178 | ||
6179 | mlog(0, "reflink xattr in container %llu, count = %u\n", | |
6180 | (unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6181 | |
6182 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6183 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6184 | xe = &xh->xh_entries[i]; |
6185 | ||
0fe9b66c TM |
6186 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6187 | xe = &new_xh->xh_entries[j]; | |
6188 | ||
6189 | le16_add_cpu(&new_xh->xh_count, -1); | |
6190 | if (new_xh->xh_count) { | |
6191 | memmove(xe, xe + 1, | |
6192 | (void *)last - (void *)xe); | |
6193 | memset(last, 0, | |
6194 | sizeof(struct ocfs2_xattr_entry)); | |
6195 | } | |
6196 | ||
6197 | /* | |
6198 | * We don't want j to increase in the next round since | |
6199 | * it is already moved ahead. | |
6200 | */ | |
6201 | j--; | |
6202 | continue; | |
6203 | } | |
6204 | ||
2999d12f TM |
6205 | if (ocfs2_xattr_is_local(xe)) |
6206 | continue; | |
6207 | ||
6208 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6209 | if (ret) { | |
6210 | mlog_errno(ret); | |
6211 | break; | |
6212 | } | |
6213 | ||
0fe9b66c | 6214 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6215 | if (ret) { |
6216 | mlog_errno(ret); | |
6217 | break; | |
6218 | } | |
6219 | ||
6220 | /* | |
6221 | * For the xattr which has l_tree_depth = 0, all the extent | |
6222 | * recs have already be copied to the new xh with the | |
6223 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6224 | * increase the refount count int the refcount tree. | |
6225 | * | |
6226 | * For the xattr which has l_tree_depth > 0, we need | |
6227 | * to initialize it to the empty default value root, | |
6228 | * and then insert the extents one by one. | |
6229 | */ | |
6230 | if (xv->xr_list.l_tree_depth) { | |
6231 | memcpy(new_xv, &def_xv, sizeof(def_xv)); | |
6232 | vb->vb_xv = new_xv; | |
6233 | vb->vb_bh = value_bh; | |
6234 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6235 | INODE_CACHE(args->new_inode), vb); | |
6236 | } | |
6237 | ||
6238 | clusters = le32_to_cpu(xv->xr_clusters); | |
6239 | cpos = 0; | |
6240 | while (cpos < clusters) { | |
6241 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6242 | cpos, | |
6243 | &p_cluster, | |
6244 | &num_clusters, | |
6245 | &xv->xr_list, | |
6246 | &ext_flags); | |
6247 | if (ret) { | |
6248 | mlog_errno(ret); | |
6249 | goto out; | |
6250 | } | |
6251 | ||
6252 | BUG_ON(!p_cluster); | |
6253 | ||
6254 | if (xv->xr_list.l_tree_depth) { | |
6255 | ret = ocfs2_insert_extent(handle, | |
6256 | &data_et, cpos, | |
6257 | ocfs2_clusters_to_blocks( | |
6258 | args->old_inode->i_sb, | |
6259 | p_cluster), | |
6260 | num_clusters, ext_flags, | |
6261 | meta_ac); | |
6262 | if (ret) { | |
6263 | mlog_errno(ret); | |
6264 | goto out; | |
6265 | } | |
6266 | } | |
6267 | ||
6268 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6269 | args->ref_root_bh, | |
6270 | p_cluster, num_clusters, | |
6271 | meta_ac, args->dealloc); | |
6272 | if (ret) { | |
6273 | mlog_errno(ret); | |
6274 | goto out; | |
6275 | } | |
6276 | ||
6277 | cpos += num_clusters; | |
6278 | } | |
6279 | } | |
6280 | ||
6281 | out: | |
6282 | return ret; | |
6283 | } | |
6284 | ||
6285 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6286 | { | |
6287 | int ret = 0, credits = 0; | |
6288 | handle_t *handle; | |
6289 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6290 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6291 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6292 | int header_off = osb->sb->s_blocksize - inline_size; | |
6293 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6294 | (args->old_bh->b_data + header_off); | |
6295 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6296 | (args->new_bh->b_data + header_off); | |
6297 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6298 | struct ocfs2_inode_info *new_oi; | |
6299 | struct ocfs2_dinode *new_di; | |
6300 | struct ocfs2_xattr_value_buf vb = { | |
6301 | .vb_bh = args->new_bh, | |
6302 | .vb_access = ocfs2_journal_access_di, | |
6303 | }; | |
6304 | ||
6305 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6306 | &credits, &meta_ac); | |
6307 | if (ret) { | |
6308 | mlog_errno(ret); | |
6309 | goto out; | |
6310 | } | |
6311 | ||
6312 | handle = ocfs2_start_trans(osb, credits); | |
6313 | if (IS_ERR(handle)) { | |
6314 | ret = PTR_ERR(handle); | |
6315 | mlog_errno(ret); | |
6316 | goto out; | |
6317 | } | |
6318 | ||
6319 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6320 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6321 | if (ret) { | |
6322 | mlog_errno(ret); | |
6323 | goto out_commit; | |
6324 | } | |
6325 | ||
6326 | memcpy(args->new_bh->b_data + header_off, | |
6327 | args->old_bh->b_data + header_off, inline_size); | |
6328 | ||
6329 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6330 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6331 | ||
6332 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6333 | args->new_bh, new_xh, &vb, meta_ac, | |
6334 | ocfs2_get_xattr_value_root, NULL); | |
6335 | if (ret) { | |
6336 | mlog_errno(ret); | |
6337 | goto out_commit; | |
6338 | } | |
6339 | ||
6340 | new_oi = OCFS2_I(args->new_inode); | |
6341 | spin_lock(&new_oi->ip_lock); | |
6342 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6343 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6344 | spin_unlock(&new_oi->ip_lock); | |
6345 | ||
6346 | ocfs2_journal_dirty(handle, args->new_bh); | |
6347 | ||
6348 | out_commit: | |
6349 | ocfs2_commit_trans(osb, handle); | |
6350 | ||
6351 | out: | |
6352 | if (meta_ac) | |
6353 | ocfs2_free_alloc_context(meta_ac); | |
6354 | return ret; | |
6355 | } | |
6356 | ||
6357 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6358 | struct buffer_head *fe_bh, | |
6359 | struct buffer_head **ret_bh, | |
6360 | int indexed) | |
6361 | { | |
6362 | int ret; | |
6363 | handle_t *handle; | |
6364 | struct ocfs2_alloc_context *meta_ac; | |
6365 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6366 | ||
6367 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
6368 | if (ret < 0) { | |
6369 | mlog_errno(ret); | |
6370 | return ret; | |
6371 | } | |
6372 | ||
6373 | handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
6374 | if (IS_ERR(handle)) { | |
6375 | ret = PTR_ERR(handle); | |
6376 | mlog_errno(ret); | |
6377 | goto out; | |
6378 | } | |
6379 | ||
6380 | mlog(0, "create new xattr block for inode %llu, index = %d\n", | |
6381 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
6382 | ret = ocfs2_create_xattr_block(handle, inode, fe_bh, | |
6383 | meta_ac, ret_bh, indexed); | |
6384 | if (ret) | |
6385 | mlog_errno(ret); | |
6386 | ||
6387 | ocfs2_commit_trans(osb, handle); | |
6388 | out: | |
6389 | ocfs2_free_alloc_context(meta_ac); | |
6390 | return ret; | |
6391 | } | |
6392 | ||
6393 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6394 | struct buffer_head *blk_bh, | |
6395 | struct buffer_head *new_blk_bh) | |
6396 | { | |
6397 | int ret = 0, credits = 0; | |
6398 | handle_t *handle; | |
6399 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6400 | struct ocfs2_dinode *new_di; | |
6401 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6402 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6403 | struct ocfs2_xattr_block *xb = | |
6404 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6405 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6406 | struct ocfs2_xattr_block *new_xb = | |
6407 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6408 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6409 | struct ocfs2_alloc_context *meta_ac; | |
6410 | struct ocfs2_xattr_value_buf vb = { | |
6411 | .vb_bh = new_blk_bh, | |
6412 | .vb_access = ocfs2_journal_access_xb, | |
6413 | }; | |
6414 | ||
6415 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6416 | &credits, &meta_ac); | |
6417 | if (ret) { | |
6418 | mlog_errno(ret); | |
6419 | return ret; | |
6420 | } | |
6421 | ||
6422 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6423 | handle = ocfs2_start_trans(osb, credits + 1); | |
6424 | if (IS_ERR(handle)) { | |
6425 | ret = PTR_ERR(handle); | |
6426 | mlog_errno(ret); | |
6427 | goto out; | |
6428 | } | |
6429 | ||
6430 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6431 | ret = ocfs2_journal_access_di(handle, | |
6432 | INODE_CACHE(args->new_inode), | |
6433 | args->new_bh, | |
6434 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6435 | if (ret) { | |
6436 | mlog_errno(ret); | |
6437 | goto out_commit; | |
6438 | } | |
6439 | } | |
6440 | ||
6441 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6442 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6443 | if (ret) { | |
6444 | mlog_errno(ret); | |
6445 | goto out_commit; | |
6446 | } | |
6447 | ||
6448 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6449 | osb->sb->s_blocksize - header_off); | |
6450 | ||
6451 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6452 | new_blk_bh, new_xh, &vb, meta_ac, | |
6453 | ocfs2_get_xattr_value_root, NULL); | |
6454 | if (ret) { | |
6455 | mlog_errno(ret); | |
6456 | goto out_commit; | |
6457 | } | |
6458 | ||
6459 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6460 | ||
6461 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6462 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6463 | spin_lock(&new_oi->ip_lock); | |
6464 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6465 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6466 | spin_unlock(&new_oi->ip_lock); | |
6467 | ||
6468 | ocfs2_journal_dirty(handle, args->new_bh); | |
6469 | } | |
6470 | ||
6471 | out_commit: | |
6472 | ocfs2_commit_trans(osb, handle); | |
6473 | ||
6474 | out: | |
6475 | ocfs2_free_alloc_context(meta_ac); | |
6476 | return ret; | |
6477 | } | |
6478 | ||
6479 | struct ocfs2_reflink_xattr_tree_args { | |
6480 | struct ocfs2_xattr_reflink *reflink; | |
6481 | struct buffer_head *old_blk_bh; | |
6482 | struct buffer_head *new_blk_bh; | |
6483 | struct ocfs2_xattr_bucket *old_bucket; | |
6484 | struct ocfs2_xattr_bucket *new_bucket; | |
6485 | }; | |
6486 | ||
6487 | /* | |
6488 | * NOTE: | |
6489 | * We have to handle the case that both old bucket and new bucket | |
6490 | * will call this function to get the right ret_bh. | |
6491 | * So The caller must give us the right bh. | |
6492 | */ | |
6493 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6494 | struct buffer_head *bh, | |
6495 | struct ocfs2_xattr_header *xh, | |
6496 | int offset, | |
6497 | struct ocfs2_xattr_value_root **xv, | |
6498 | struct buffer_head **ret_bh, | |
6499 | void *para) | |
6500 | { | |
6501 | struct ocfs2_reflink_xattr_tree_args *args = | |
6502 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6503 | struct ocfs2_xattr_bucket *bucket; | |
6504 | ||
6505 | if (bh == args->old_bucket->bu_bhs[0]) | |
6506 | bucket = args->old_bucket; | |
6507 | else | |
6508 | bucket = args->new_bucket; | |
6509 | ||
6510 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6511 | xv, ret_bh); | |
6512 | } | |
6513 | ||
6514 | struct ocfs2_value_tree_metas { | |
6515 | int num_metas; | |
6516 | int credits; | |
6517 | int num_recs; | |
6518 | }; | |
6519 | ||
6520 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6521 | struct buffer_head *bh, | |
6522 | struct ocfs2_xattr_header *xh, | |
6523 | int offset, | |
6524 | struct ocfs2_xattr_value_root **xv, | |
6525 | struct buffer_head **ret_bh, | |
6526 | void *para) | |
6527 | { | |
6528 | struct ocfs2_xattr_bucket *bucket = | |
6529 | (struct ocfs2_xattr_bucket *)para; | |
6530 | ||
6531 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6532 | xv, ret_bh); | |
6533 | } | |
6534 | ||
6535 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6536 | struct ocfs2_xattr_bucket *bucket, | |
6537 | void *para) | |
6538 | { | |
6539 | struct ocfs2_value_tree_metas *metas = | |
6540 | (struct ocfs2_value_tree_metas *)para; | |
6541 | struct ocfs2_xattr_header *xh = | |
6542 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6543 | ||
6544 | /* Add the credits for this bucket first. */ | |
6545 | metas->credits += bucket->bu_blocks; | |
6546 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6547 | xh, &metas->num_metas, | |
6548 | &metas->credits, &metas->num_recs, | |
6549 | ocfs2_value_tree_metas_in_bucket, | |
6550 | bucket); | |
6551 | } | |
6552 | ||
6553 | /* | |
6554 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6555 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6556 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6557 | */ | |
6558 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6559 | struct ocfs2_reflink_xattr_tree_args *args, | |
6560 | struct ocfs2_extent_tree *xt_et, | |
6561 | u64 blkno, u32 len, int *credits, | |
6562 | struct ocfs2_alloc_context **meta_ac, | |
6563 | struct ocfs2_alloc_context **data_ac) | |
6564 | { | |
6565 | int ret, num_free_extents; | |
6566 | struct ocfs2_value_tree_metas metas; | |
6567 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6568 | struct ocfs2_refcount_block *rb; | |
6569 | ||
6570 | memset(&metas, 0, sizeof(metas)); | |
6571 | ||
6572 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6573 | ocfs2_calc_value_tree_metas, &metas); | |
6574 | if (ret) { | |
6575 | mlog_errno(ret); | |
6576 | goto out; | |
6577 | } | |
6578 | ||
6579 | *credits = metas.credits; | |
6580 | ||
6581 | /* | |
6582 | * Calculate we need for refcount tree change. | |
6583 | * | |
6584 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6585 | * an approximate number we need for refcount tree change. | |
6586 | * Sometimes we need to split the tree, and after split, half recs | |
6587 | * will be moved to the new block, and a new block can only provide | |
6588 | * half number of recs. So we multiple new blocks by 2. | |
6589 | * In the end, we have to add credits for modifying the already | |
6590 | * existed refcount block. | |
6591 | */ | |
6592 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6593 | metas.num_recs = | |
6594 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6595 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6596 | metas.num_metas += metas.num_recs; | |
6597 | *credits += metas.num_recs + | |
6598 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6599 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6600 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6601 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6602 | else | |
6603 | *credits += 1; | |
6604 | ||
6605 | /* count in the xattr tree change. */ | |
6606 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); | |
6607 | if (num_free_extents < 0) { | |
6608 | ret = num_free_extents; | |
6609 | mlog_errno(ret); | |
6610 | goto out; | |
6611 | } | |
6612 | ||
6613 | if (num_free_extents < len) | |
6614 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6615 | ||
6616 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
6617 | xt_et->et_root_el, len); | |
6618 | ||
6619 | if (metas.num_metas) { | |
6620 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6621 | meta_ac); | |
6622 | if (ret) { | |
6623 | mlog_errno(ret); | |
6624 | goto out; | |
6625 | } | |
6626 | } | |
6627 | ||
6628 | if (len) { | |
6629 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6630 | if (ret) | |
6631 | mlog_errno(ret); | |
6632 | } | |
6633 | out: | |
6634 | if (ret) { | |
6635 | if (*meta_ac) { | |
6636 | ocfs2_free_alloc_context(*meta_ac); | |
6637 | meta_ac = NULL; | |
6638 | } | |
6639 | } | |
6640 | ||
6641 | return ret; | |
6642 | } | |
6643 | ||
6644 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6645 | u64 blkno, u64 new_blkno, u32 clusters, | |
6646 | struct ocfs2_alloc_context *meta_ac, | |
6647 | struct ocfs2_alloc_context *data_ac, | |
6648 | struct ocfs2_reflink_xattr_tree_args *args) | |
6649 | { | |
6650 | int i, j, ret = 0; | |
6651 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
6652 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
6653 | u32 num_buckets = clusters * bpc; | |
6654 | int bpb = args->old_bucket->bu_blocks; | |
6655 | struct ocfs2_xattr_value_buf vb = { | |
6656 | .vb_access = ocfs2_journal_access, | |
6657 | }; | |
6658 | ||
6659 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6660 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6661 | if (ret) { | |
6662 | mlog_errno(ret); | |
6663 | break; | |
6664 | } | |
6665 | ||
6666 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno); | |
6667 | if (ret) { | |
6668 | mlog_errno(ret); | |
6669 | break; | |
6670 | } | |
6671 | ||
6672 | /* | |
6673 | * The real bucket num in this series of blocks is stored | |
6674 | * in the 1st bucket. | |
6675 | */ | |
6676 | if (i == 0) | |
6677 | num_buckets = le16_to_cpu( | |
6678 | bucket_xh(args->old_bucket)->xh_num_buckets); | |
6679 | ||
6680 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6681 | args->new_bucket, | |
6682 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6683 | if (ret) { | |
6684 | mlog_errno(ret); | |
6685 | break; | |
6686 | } | |
6687 | ||
6688 | for (j = 0; j < bpb; j++) | |
6689 | memcpy(bucket_block(args->new_bucket, j), | |
6690 | bucket_block(args->old_bucket, j), | |
6691 | sb->s_blocksize); | |
6692 | ||
6693 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6694 | ||
6695 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6696 | args->old_bucket->bu_bhs[0], | |
6697 | bucket_xh(args->old_bucket), | |
6698 | args->new_bucket->bu_bhs[0], | |
6699 | bucket_xh(args->new_bucket), | |
6700 | &vb, meta_ac, | |
6701 | ocfs2_get_reflink_xattr_value_root, | |
6702 | args); | |
6703 | if (ret) { | |
6704 | mlog_errno(ret); | |
6705 | break; | |
6706 | } | |
6707 | ||
6708 | /* | |
6709 | * Re-access and dirty the bucket to calculate metaecc. | |
6710 | * Because we may extend the transaction in reflink_xattr_header | |
6711 | * which will let the already accessed block gone. | |
6712 | */ | |
6713 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6714 | args->new_bucket, | |
6715 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6716 | if (ret) { | |
6717 | mlog_errno(ret); | |
6718 | break; | |
6719 | } | |
6720 | ||
6721 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6722 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6723 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6724 | } | |
6725 | ||
6726 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6727 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6728 | return ret; | |
6729 | } | |
6730 | /* | |
6731 | * Create the same xattr extent record in the new inode's xattr tree. | |
6732 | */ | |
6733 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6734 | struct buffer_head *root_bh, | |
6735 | u64 blkno, | |
6736 | u32 cpos, | |
6737 | u32 len, | |
6738 | void *para) | |
6739 | { | |
6740 | int ret, credits = 0; | |
6741 | u32 p_cluster, num_clusters; | |
6742 | u64 new_blkno; | |
6743 | handle_t *handle; | |
6744 | struct ocfs2_reflink_xattr_tree_args *args = | |
6745 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6746 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6747 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6748 | struct ocfs2_alloc_context *data_ac = NULL; | |
6749 | struct ocfs2_extent_tree et; | |
6750 | ||
6751 | ocfs2_init_xattr_tree_extent_tree(&et, | |
6752 | INODE_CACHE(args->reflink->new_inode), | |
6753 | args->new_blk_bh); | |
6754 | ||
6755 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
6756 | len, &credits, | |
6757 | &meta_ac, &data_ac); | |
6758 | if (ret) { | |
6759 | mlog_errno(ret); | |
6760 | goto out; | |
6761 | } | |
6762 | ||
6763 | handle = ocfs2_start_trans(osb, credits); | |
6764 | if (IS_ERR(handle)) { | |
6765 | ret = PTR_ERR(handle); | |
6766 | mlog_errno(ret); | |
6767 | goto out; | |
6768 | } | |
6769 | ||
6770 | ret = ocfs2_claim_clusters(osb, handle, data_ac, | |
6771 | len, &p_cluster, &num_clusters); | |
6772 | if (ret) { | |
6773 | mlog_errno(ret); | |
6774 | goto out_commit; | |
6775 | } | |
6776 | ||
6777 | new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster); | |
6778 | ||
6779 | mlog(0, "reflink xattr buckets %llu to %llu, len %u\n", | |
6780 | (unsigned long long)blkno, (unsigned long long)new_blkno, len); | |
6781 | ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len, | |
6782 | meta_ac, data_ac, args); | |
6783 | if (ret) { | |
6784 | mlog_errno(ret); | |
6785 | goto out_commit; | |
6786 | } | |
6787 | ||
6788 | mlog(0, "insert new xattr extent rec start %llu len %u to %u\n", | |
6789 | (unsigned long long)new_blkno, len, cpos); | |
6790 | ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno, | |
6791 | len, 0, meta_ac); | |
6792 | if (ret) | |
6793 | mlog_errno(ret); | |
6794 | ||
6795 | out_commit: | |
6796 | ocfs2_commit_trans(osb, handle); | |
6797 | ||
6798 | out: | |
6799 | if (meta_ac) | |
6800 | ocfs2_free_alloc_context(meta_ac); | |
6801 | if (data_ac) | |
6802 | ocfs2_free_alloc_context(data_ac); | |
6803 | return ret; | |
6804 | } | |
6805 | ||
6806 | /* | |
6807 | * Create reflinked xattr buckets. | |
6808 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
6809 | * if they are stored outside. | |
6810 | */ | |
6811 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
6812 | struct buffer_head *blk_bh, | |
6813 | struct buffer_head *new_blk_bh) | |
6814 | { | |
6815 | int ret; | |
6816 | struct ocfs2_reflink_xattr_tree_args para; | |
6817 | ||
6818 | memset(¶, 0, sizeof(para)); | |
6819 | para.reflink = args; | |
6820 | para.old_blk_bh = blk_bh; | |
6821 | para.new_blk_bh = new_blk_bh; | |
6822 | ||
6823 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
6824 | if (!para.old_bucket) { | |
6825 | mlog_errno(-ENOMEM); | |
6826 | return -ENOMEM; | |
6827 | } | |
6828 | ||
6829 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
6830 | if (!para.new_bucket) { | |
6831 | ret = -ENOMEM; | |
6832 | mlog_errno(ret); | |
6833 | goto out; | |
6834 | } | |
6835 | ||
6836 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
6837 | ocfs2_reflink_xattr_rec, | |
6838 | ¶); | |
6839 | if (ret) | |
6840 | mlog_errno(ret); | |
6841 | ||
6842 | out: | |
6843 | ocfs2_xattr_bucket_free(para.old_bucket); | |
6844 | ocfs2_xattr_bucket_free(para.new_bucket); | |
6845 | return ret; | |
6846 | } | |
6847 | ||
6848 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
6849 | struct buffer_head *blk_bh) | |
6850 | { | |
6851 | int ret, indexed = 0; | |
6852 | struct buffer_head *new_blk_bh = NULL; | |
6853 | struct ocfs2_xattr_block *xb = | |
6854 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6855 | ||
6856 | ||
6857 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
6858 | indexed = 1; | |
6859 | ||
6860 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
6861 | &new_blk_bh, indexed); | |
6862 | if (ret) { | |
6863 | mlog_errno(ret); | |
6864 | goto out; | |
6865 | } | |
6866 | ||
6867 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) | |
6868 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); | |
6869 | else | |
6870 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
6871 | if (ret) | |
6872 | mlog_errno(ret); | |
6873 | ||
6874 | out: | |
6875 | brelse(new_blk_bh); | |
6876 | return ret; | |
6877 | } | |
6878 | ||
0fe9b66c TM |
6879 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
6880 | { | |
6881 | int type = ocfs2_xattr_get_type(xe); | |
6882 | ||
6883 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
6884 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
6885 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
6886 | } | |
6887 | ||
2999d12f TM |
6888 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
6889 | struct buffer_head *old_bh, | |
6890 | struct inode *new_inode, | |
0fe9b66c TM |
6891 | struct buffer_head *new_bh, |
6892 | bool preserve_security) | |
2999d12f TM |
6893 | { |
6894 | int ret; | |
6895 | struct ocfs2_xattr_reflink args; | |
6896 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
6897 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
6898 | struct buffer_head *blk_bh = NULL; | |
6899 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
6900 | struct ocfs2_refcount_tree *ref_tree; | |
6901 | struct buffer_head *ref_root_bh = NULL; | |
6902 | ||
6903 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
6904 | le64_to_cpu(di->i_refcount_loc), | |
6905 | 1, &ref_tree, &ref_root_bh); | |
6906 | if (ret) { | |
6907 | mlog_errno(ret); | |
6908 | goto out; | |
6909 | } | |
6910 | ||
6911 | ocfs2_init_dealloc_ctxt(&dealloc); | |
6912 | ||
6913 | args.old_inode = old_inode; | |
6914 | args.new_inode = new_inode; | |
6915 | args.old_bh = old_bh; | |
6916 | args.new_bh = new_bh; | |
6917 | args.ref_ci = &ref_tree->rf_ci; | |
6918 | args.ref_root_bh = ref_root_bh; | |
6919 | args.dealloc = &dealloc; | |
0fe9b66c TM |
6920 | if (preserve_security) |
6921 | args.xattr_reflinked = NULL; | |
6922 | else | |
6923 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
6924 | |
6925 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6926 | ret = ocfs2_reflink_xattr_inline(&args); | |
6927 | if (ret) { | |
6928 | mlog_errno(ret); | |
6929 | goto out_unlock; | |
6930 | } | |
6931 | } | |
6932 | ||
6933 | if (!di->i_xattr_loc) | |
6934 | goto out_unlock; | |
6935 | ||
6936 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
6937 | &blk_bh); | |
6938 | if (ret < 0) { | |
6939 | mlog_errno(ret); | |
6940 | goto out_unlock; | |
6941 | } | |
6942 | ||
6943 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
6944 | if (ret) | |
6945 | mlog_errno(ret); | |
6946 | ||
6947 | brelse(blk_bh); | |
6948 | ||
6949 | out_unlock: | |
6950 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
6951 | ref_tree, 1); | |
6952 | brelse(ref_root_bh); | |
6953 | ||
6954 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
6955 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
6956 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
6957 | } | |
6958 | ||
6959 | out: | |
6960 | return ret; | |
6961 | } | |
6962 | ||
0fe9b66c TM |
6963 | /* |
6964 | * Initialize security and acl for a already created inode. | |
6965 | * Used for reflink a non-preserve-security file. | |
6966 | * | |
6967 | * It uses common api like ocfs2_xattr_set, so the caller | |
6968 | * must not hold any lock expect i_mutex. | |
6969 | */ | |
6970 | int ocfs2_init_security_and_acl(struct inode *dir, | |
6971 | struct inode *inode) | |
6972 | { | |
6973 | int ret = 0; | |
6974 | struct buffer_head *dir_bh = NULL; | |
6975 | struct ocfs2_security_xattr_info si = { | |
6976 | .enable = 1, | |
6977 | }; | |
6978 | ||
6979 | ret = ocfs2_init_security_get(inode, dir, &si); | |
6980 | if (!ret) { | |
6981 | ret = ocfs2_xattr_security_set(inode, si.name, | |
6982 | si.value, si.value_len, | |
6983 | XATTR_CREATE); | |
6984 | if (ret) { | |
6985 | mlog_errno(ret); | |
6986 | goto leave; | |
6987 | } | |
6988 | } else if (ret != -EOPNOTSUPP) { | |
6989 | mlog_errno(ret); | |
6990 | goto leave; | |
6991 | } | |
6992 | ||
6993 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
6994 | if (ret) { | |
6995 | mlog_errno(ret); | |
6996 | goto leave; | |
6997 | } | |
6998 | ||
6999 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); | |
7000 | if (ret) | |
7001 | mlog_errno(ret); | |
7002 | ||
7003 | ocfs2_inode_unlock(dir, 0); | |
7004 | brelse(dir_bh); | |
7005 | leave: | |
7006 | return ret; | |
7007 | } | |
923f7f31 TY |
7008 | /* |
7009 | * 'security' attributes support | |
7010 | */ | |
7011 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
7012 | size_t list_size, const char *name, | |
7013 | size_t name_len) | |
7014 | { | |
7015 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
7016 | const size_t total_len = prefix_len + name_len + 1; | |
7017 | ||
7018 | if (list && total_len <= list_size) { | |
7019 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
7020 | memcpy(list + prefix_len, name, name_len); | |
7021 | list[prefix_len + name_len] = '\0'; | |
7022 | } | |
7023 | return total_len; | |
7024 | } | |
7025 | ||
7026 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
7027 | void *buffer, size_t size) | |
7028 | { | |
7029 | if (strcmp(name, "") == 0) | |
7030 | return -EINVAL; | |
7031 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
7032 | buffer, size); | |
7033 | } | |
7034 | ||
7035 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
7036 | const void *value, size_t size, int flags) | |
7037 | { | |
7038 | if (strcmp(name, "") == 0) | |
7039 | return -EINVAL; | |
7040 | ||
7041 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
7042 | size, flags); | |
7043 | } | |
7044 | ||
534eaddd TY |
7045 | int ocfs2_init_security_get(struct inode *inode, |
7046 | struct inode *dir, | |
7047 | struct ocfs2_security_xattr_info *si) | |
7048 | { | |
38d59ef6 TY |
7049 | /* check whether ocfs2 support feature xattr */ |
7050 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7051 | return -EOPNOTSUPP; | |
534eaddd TY |
7052 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
7053 | &si->value_len); | |
7054 | } | |
7055 | ||
7056 | int ocfs2_init_security_set(handle_t *handle, | |
7057 | struct inode *inode, | |
7058 | struct buffer_head *di_bh, | |
7059 | struct ocfs2_security_xattr_info *si, | |
7060 | struct ocfs2_alloc_context *xattr_ac, | |
7061 | struct ocfs2_alloc_context *data_ac) | |
7062 | { | |
7063 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7064 | OCFS2_XATTR_INDEX_SECURITY, | |
7065 | si->name, si->value, si->value_len, 0, | |
7066 | xattr_ac, data_ac); | |
7067 | } | |
7068 | ||
923f7f31 TY |
7069 | struct xattr_handler ocfs2_xattr_security_handler = { |
7070 | .prefix = XATTR_SECURITY_PREFIX, | |
7071 | .list = ocfs2_xattr_security_list, | |
7072 | .get = ocfs2_xattr_security_get, | |
7073 | .set = ocfs2_xattr_security_set, | |
7074 | }; | |
7075 | ||
99219aea MF |
7076 | /* |
7077 | * 'trusted' attributes support | |
7078 | */ | |
99219aea MF |
7079 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
7080 | size_t list_size, const char *name, | |
7081 | size_t name_len) | |
7082 | { | |
ceb1eba3 | 7083 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
7084 | const size_t total_len = prefix_len + name_len + 1; |
7085 | ||
7086 | if (list && total_len <= list_size) { | |
7087 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
7088 | memcpy(list + prefix_len, name, name_len); | |
7089 | list[prefix_len + name_len] = '\0'; | |
7090 | } | |
7091 | return total_len; | |
7092 | } | |
7093 | ||
7094 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
7095 | void *buffer, size_t size) | |
7096 | { | |
7097 | if (strcmp(name, "") == 0) | |
7098 | return -EINVAL; | |
7099 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
7100 | buffer, size); | |
7101 | } | |
7102 | ||
7103 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
7104 | const void *value, size_t size, int flags) | |
7105 | { | |
7106 | if (strcmp(name, "") == 0) | |
7107 | return -EINVAL; | |
7108 | ||
7109 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
7110 | size, flags); | |
7111 | } | |
7112 | ||
7113 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
7114 | .prefix = XATTR_TRUSTED_PREFIX, | |
7115 | .list = ocfs2_xattr_trusted_list, | |
7116 | .get = ocfs2_xattr_trusted_get, | |
7117 | .set = ocfs2_xattr_trusted_set, | |
7118 | }; | |
7119 | ||
99219aea MF |
7120 | /* |
7121 | * 'user' attributes support | |
7122 | */ | |
99219aea MF |
7123 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
7124 | size_t list_size, const char *name, | |
7125 | size_t name_len) | |
7126 | { | |
ceb1eba3 | 7127 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
7128 | const size_t total_len = prefix_len + name_len + 1; |
7129 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7130 | ||
7131 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7132 | return 0; | |
7133 | ||
7134 | if (list && total_len <= list_size) { | |
7135 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
7136 | memcpy(list + prefix_len, name, name_len); | |
7137 | list[prefix_len + name_len] = '\0'; | |
7138 | } | |
7139 | return total_len; | |
7140 | } | |
7141 | ||
7142 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
7143 | void *buffer, size_t size) | |
7144 | { | |
7145 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7146 | ||
7147 | if (strcmp(name, "") == 0) | |
7148 | return -EINVAL; | |
7149 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7150 | return -EOPNOTSUPP; | |
7151 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
7152 | buffer, size); | |
7153 | } | |
7154 | ||
7155 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
7156 | const void *value, size_t size, int flags) | |
7157 | { | |
7158 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7159 | ||
7160 | if (strcmp(name, "") == 0) | |
7161 | return -EINVAL; | |
7162 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7163 | return -EOPNOTSUPP; | |
7164 | ||
7165 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
7166 | size, flags); | |
7167 | } | |
7168 | ||
7169 | struct xattr_handler ocfs2_xattr_user_handler = { | |
7170 | .prefix = XATTR_USER_PREFIX, | |
7171 | .list = ocfs2_xattr_user_list, | |
7172 | .get = ocfs2_xattr_user_get, | |
7173 | .set = ocfs2_xattr_user_set, | |
7174 | }; |