Loading...
Note: File does not exist in v3.5.6.
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * fs/f2fs/xattr.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 *
8 * Portions of this code from linux/fs/ext2/xattr.c
9 *
10 * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de>
11 *
12 * Fix by Harrison Xing <harrison@mountainviewdata.com>.
13 * Extended attributes for symlinks and special files added per
14 * suggestion of Luka Renko <luka.renko@hermes.si>.
15 * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>,
16 * Red Hat Inc.
17 */
18#include <linux/rwsem.h>
19#include <linux/f2fs_fs.h>
20#include <linux/security.h>
21#include <linux/posix_acl_xattr.h>
22#include "f2fs.h"
23#include "xattr.h"
24#include "segment.h"
25
26static void *xattr_alloc(struct f2fs_sb_info *sbi, int size, bool *is_inline)
27{
28 if (likely(size == sbi->inline_xattr_slab_size)) {
29 *is_inline = true;
30 return kmem_cache_zalloc(sbi->inline_xattr_slab, GFP_NOFS);
31 }
32 *is_inline = false;
33 return f2fs_kzalloc(sbi, size, GFP_NOFS);
34}
35
36static void xattr_free(struct f2fs_sb_info *sbi, void *xattr_addr,
37 bool is_inline)
38{
39 if (is_inline)
40 kmem_cache_free(sbi->inline_xattr_slab, xattr_addr);
41 else
42 kfree(xattr_addr);
43}
44
45static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
46 struct dentry *unused, struct inode *inode,
47 const char *name, void *buffer, size_t size)
48{
49 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
50
51 switch (handler->flags) {
52 case F2FS_XATTR_INDEX_USER:
53 if (!test_opt(sbi, XATTR_USER))
54 return -EOPNOTSUPP;
55 break;
56 case F2FS_XATTR_INDEX_TRUSTED:
57 case F2FS_XATTR_INDEX_SECURITY:
58 break;
59 default:
60 return -EINVAL;
61 }
62 return f2fs_getxattr(inode, handler->flags, name,
63 buffer, size, NULL);
64}
65
66static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
67 struct user_namespace *mnt_userns,
68 struct dentry *unused, struct inode *inode,
69 const char *name, const void *value,
70 size_t size, int flags)
71{
72 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
73
74 switch (handler->flags) {
75 case F2FS_XATTR_INDEX_USER:
76 if (!test_opt(sbi, XATTR_USER))
77 return -EOPNOTSUPP;
78 break;
79 case F2FS_XATTR_INDEX_TRUSTED:
80 case F2FS_XATTR_INDEX_SECURITY:
81 break;
82 default:
83 return -EINVAL;
84 }
85 return f2fs_setxattr(inode, handler->flags, name,
86 value, size, NULL, flags);
87}
88
89static bool f2fs_xattr_user_list(struct dentry *dentry)
90{
91 struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
92
93 return test_opt(sbi, XATTR_USER);
94}
95
96static bool f2fs_xattr_trusted_list(struct dentry *dentry)
97{
98 return capable(CAP_SYS_ADMIN);
99}
100
101static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
102 struct dentry *unused, struct inode *inode,
103 const char *name, void *buffer, size_t size)
104{
105 if (buffer)
106 *((char *)buffer) = F2FS_I(inode)->i_advise;
107 return sizeof(char);
108}
109
110static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
111 struct user_namespace *mnt_userns,
112 struct dentry *unused, struct inode *inode,
113 const char *name, const void *value,
114 size_t size, int flags)
115{
116 unsigned char old_advise = F2FS_I(inode)->i_advise;
117 unsigned char new_advise;
118
119 if (!inode_owner_or_capable(&init_user_ns, inode))
120 return -EPERM;
121 if (value == NULL)
122 return -EINVAL;
123
124 new_advise = *(char *)value;
125 if (new_advise & ~FADVISE_MODIFIABLE_BITS)
126 return -EINVAL;
127
128 new_advise = new_advise & FADVISE_MODIFIABLE_BITS;
129 new_advise |= old_advise & ~FADVISE_MODIFIABLE_BITS;
130
131 F2FS_I(inode)->i_advise = new_advise;
132 f2fs_mark_inode_dirty_sync(inode, true);
133 return 0;
134}
135
136#ifdef CONFIG_F2FS_FS_SECURITY
137static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
138 void *page)
139{
140 const struct xattr *xattr;
141 int err = 0;
142
143 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
144 err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
145 xattr->name, xattr->value,
146 xattr->value_len, (struct page *)page, 0);
147 if (err < 0)
148 break;
149 }
150 return err;
151}
152
153int f2fs_init_security(struct inode *inode, struct inode *dir,
154 const struct qstr *qstr, struct page *ipage)
155{
156 return security_inode_init_security(inode, dir, qstr,
157 &f2fs_initxattrs, ipage);
158}
159#endif
160
161const struct xattr_handler f2fs_xattr_user_handler = {
162 .prefix = XATTR_USER_PREFIX,
163 .flags = F2FS_XATTR_INDEX_USER,
164 .list = f2fs_xattr_user_list,
165 .get = f2fs_xattr_generic_get,
166 .set = f2fs_xattr_generic_set,
167};
168
169const struct xattr_handler f2fs_xattr_trusted_handler = {
170 .prefix = XATTR_TRUSTED_PREFIX,
171 .flags = F2FS_XATTR_INDEX_TRUSTED,
172 .list = f2fs_xattr_trusted_list,
173 .get = f2fs_xattr_generic_get,
174 .set = f2fs_xattr_generic_set,
175};
176
177const struct xattr_handler f2fs_xattr_advise_handler = {
178 .name = F2FS_SYSTEM_ADVISE_NAME,
179 .flags = F2FS_XATTR_INDEX_ADVISE,
180 .get = f2fs_xattr_advise_get,
181 .set = f2fs_xattr_advise_set,
182};
183
184const struct xattr_handler f2fs_xattr_security_handler = {
185 .prefix = XATTR_SECURITY_PREFIX,
186 .flags = F2FS_XATTR_INDEX_SECURITY,
187 .get = f2fs_xattr_generic_get,
188 .set = f2fs_xattr_generic_set,
189};
190
191static const struct xattr_handler *f2fs_xattr_handler_map[] = {
192 [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
193#ifdef CONFIG_F2FS_FS_POSIX_ACL
194 [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
195 [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
196#endif
197 [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
198#ifdef CONFIG_F2FS_FS_SECURITY
199 [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
200#endif
201 [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
202};
203
204const struct xattr_handler *f2fs_xattr_handlers[] = {
205 &f2fs_xattr_user_handler,
206#ifdef CONFIG_F2FS_FS_POSIX_ACL
207 &posix_acl_access_xattr_handler,
208 &posix_acl_default_xattr_handler,
209#endif
210 &f2fs_xattr_trusted_handler,
211#ifdef CONFIG_F2FS_FS_SECURITY
212 &f2fs_xattr_security_handler,
213#endif
214 &f2fs_xattr_advise_handler,
215 NULL,
216};
217
218static inline const struct xattr_handler *f2fs_xattr_handler(int index)
219{
220 const struct xattr_handler *handler = NULL;
221
222 if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
223 handler = f2fs_xattr_handler_map[index];
224 return handler;
225}
226
227static struct f2fs_xattr_entry *__find_xattr(void *base_addr,
228 void *last_base_addr, int index,
229 size_t len, const char *name)
230{
231 struct f2fs_xattr_entry *entry;
232
233 list_for_each_xattr(entry, base_addr) {
234 if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
235 (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr)
236 return NULL;
237
238 if (entry->e_name_index != index)
239 continue;
240 if (entry->e_name_len != len)
241 continue;
242 if (!memcmp(entry->e_name, name, len))
243 break;
244 }
245 return entry;
246}
247
248static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
249 void *base_addr, void **last_addr, int index,
250 size_t len, const char *name)
251{
252 struct f2fs_xattr_entry *entry;
253 unsigned int inline_size = inline_xattr_size(inode);
254 void *max_addr = base_addr + inline_size;
255
256 list_for_each_xattr(entry, base_addr) {
257 if ((void *)entry + sizeof(__u32) > max_addr ||
258 (void *)XATTR_NEXT_ENTRY(entry) > max_addr) {
259 *last_addr = entry;
260 return NULL;
261 }
262 if (entry->e_name_index != index)
263 continue;
264 if (entry->e_name_len != len)
265 continue;
266 if (!memcmp(entry->e_name, name, len))
267 break;
268 }
269
270 /* inline xattr header or entry across max inline xattr size */
271 if (IS_XATTR_LAST_ENTRY(entry) &&
272 (void *)entry + sizeof(__u32) > max_addr) {
273 *last_addr = entry;
274 return NULL;
275 }
276 return entry;
277}
278
279static int read_inline_xattr(struct inode *inode, struct page *ipage,
280 void *txattr_addr)
281{
282 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
283 unsigned int inline_size = inline_xattr_size(inode);
284 struct page *page = NULL;
285 void *inline_addr;
286
287 if (ipage) {
288 inline_addr = inline_xattr_addr(inode, ipage);
289 } else {
290 page = f2fs_get_node_page(sbi, inode->i_ino);
291 if (IS_ERR(page))
292 return PTR_ERR(page);
293
294 inline_addr = inline_xattr_addr(inode, page);
295 }
296 memcpy(txattr_addr, inline_addr, inline_size);
297 f2fs_put_page(page, 1);
298
299 return 0;
300}
301
302static int read_xattr_block(struct inode *inode, void *txattr_addr)
303{
304 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
305 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
306 unsigned int inline_size = inline_xattr_size(inode);
307 struct page *xpage;
308 void *xattr_addr;
309
310 /* The inode already has an extended attribute block. */
311 xpage = f2fs_get_node_page(sbi, xnid);
312 if (IS_ERR(xpage))
313 return PTR_ERR(xpage);
314
315 xattr_addr = page_address(xpage);
316 memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE);
317 f2fs_put_page(xpage, 1);
318
319 return 0;
320}
321
322static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
323 unsigned int index, unsigned int len,
324 const char *name, struct f2fs_xattr_entry **xe,
325 void **base_addr, int *base_size,
326 bool *is_inline)
327{
328 void *cur_addr, *txattr_addr, *last_txattr_addr;
329 void *last_addr = NULL;
330 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
331 unsigned int inline_size = inline_xattr_size(inode);
332 int err;
333
334 if (!xnid && !inline_size)
335 return -ENODATA;
336
337 *base_size = XATTR_SIZE(inode) + XATTR_PADDING_SIZE;
338 txattr_addr = xattr_alloc(F2FS_I_SB(inode), *base_size, is_inline);
339 if (!txattr_addr)
340 return -ENOMEM;
341
342 last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(inode);
343
344 /* read from inline xattr */
345 if (inline_size) {
346 err = read_inline_xattr(inode, ipage, txattr_addr);
347 if (err)
348 goto out;
349
350 *xe = __find_inline_xattr(inode, txattr_addr, &last_addr,
351 index, len, name);
352 if (*xe) {
353 *base_size = inline_size;
354 goto check;
355 }
356 }
357
358 /* read from xattr node block */
359 if (xnid) {
360 err = read_xattr_block(inode, txattr_addr);
361 if (err)
362 goto out;
363 }
364
365 if (last_addr)
366 cur_addr = XATTR_HDR(last_addr) - 1;
367 else
368 cur_addr = txattr_addr;
369
370 *xe = __find_xattr(cur_addr, last_txattr_addr, index, len, name);
371 if (!*xe) {
372 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
373 inode->i_ino);
374 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
375 err = -EFSCORRUPTED;
376 goto out;
377 }
378check:
379 if (IS_XATTR_LAST_ENTRY(*xe)) {
380 err = -ENODATA;
381 goto out;
382 }
383
384 *base_addr = txattr_addr;
385 return 0;
386out:
387 xattr_free(F2FS_I_SB(inode), txattr_addr, *is_inline);
388 return err;
389}
390
391static int read_all_xattrs(struct inode *inode, struct page *ipage,
392 void **base_addr)
393{
394 struct f2fs_xattr_header *header;
395 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
396 unsigned int size = VALID_XATTR_BLOCK_SIZE;
397 unsigned int inline_size = inline_xattr_size(inode);
398 void *txattr_addr;
399 int err;
400
401 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode),
402 inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS);
403 if (!txattr_addr)
404 return -ENOMEM;
405
406 /* read from inline xattr */
407 if (inline_size) {
408 err = read_inline_xattr(inode, ipage, txattr_addr);
409 if (err)
410 goto fail;
411 }
412
413 /* read from xattr node block */
414 if (xnid) {
415 err = read_xattr_block(inode, txattr_addr);
416 if (err)
417 goto fail;
418 }
419
420 header = XATTR_HDR(txattr_addr);
421
422 /* never been allocated xattrs */
423 if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
424 header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
425 header->h_refcount = cpu_to_le32(1);
426 }
427 *base_addr = txattr_addr;
428 return 0;
429fail:
430 kfree(txattr_addr);
431 return err;
432}
433
434static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
435 void *txattr_addr, struct page *ipage)
436{
437 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
438 size_t inline_size = inline_xattr_size(inode);
439 struct page *in_page = NULL;
440 void *xattr_addr;
441 void *inline_addr = NULL;
442 struct page *xpage;
443 nid_t new_nid = 0;
444 int err = 0;
445
446 if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
447 if (!f2fs_alloc_nid(sbi, &new_nid))
448 return -ENOSPC;
449
450 /* write to inline xattr */
451 if (inline_size) {
452 if (ipage) {
453 inline_addr = inline_xattr_addr(inode, ipage);
454 } else {
455 in_page = f2fs_get_node_page(sbi, inode->i_ino);
456 if (IS_ERR(in_page)) {
457 f2fs_alloc_nid_failed(sbi, new_nid);
458 return PTR_ERR(in_page);
459 }
460 inline_addr = inline_xattr_addr(inode, in_page);
461 }
462
463 f2fs_wait_on_page_writeback(ipage ? ipage : in_page,
464 NODE, true, true);
465 /* no need to use xattr node block */
466 if (hsize <= inline_size) {
467 err = f2fs_truncate_xattr_node(inode);
468 f2fs_alloc_nid_failed(sbi, new_nid);
469 if (err) {
470 f2fs_put_page(in_page, 1);
471 return err;
472 }
473 memcpy(inline_addr, txattr_addr, inline_size);
474 set_page_dirty(ipage ? ipage : in_page);
475 goto in_page_out;
476 }
477 }
478
479 /* write to xattr node block */
480 if (F2FS_I(inode)->i_xattr_nid) {
481 xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
482 if (IS_ERR(xpage)) {
483 err = PTR_ERR(xpage);
484 f2fs_alloc_nid_failed(sbi, new_nid);
485 goto in_page_out;
486 }
487 f2fs_bug_on(sbi, new_nid);
488 f2fs_wait_on_page_writeback(xpage, NODE, true, true);
489 } else {
490 struct dnode_of_data dn;
491
492 set_new_dnode(&dn, inode, NULL, NULL, new_nid);
493 xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET);
494 if (IS_ERR(xpage)) {
495 err = PTR_ERR(xpage);
496 f2fs_alloc_nid_failed(sbi, new_nid);
497 goto in_page_out;
498 }
499 f2fs_alloc_nid_done(sbi, new_nid);
500 }
501 xattr_addr = page_address(xpage);
502
503 if (inline_size)
504 memcpy(inline_addr, txattr_addr, inline_size);
505 memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
506
507 if (inline_size)
508 set_page_dirty(ipage ? ipage : in_page);
509 set_page_dirty(xpage);
510
511 f2fs_put_page(xpage, 1);
512in_page_out:
513 f2fs_put_page(in_page, 1);
514 return err;
515}
516
517int f2fs_getxattr(struct inode *inode, int index, const char *name,
518 void *buffer, size_t buffer_size, struct page *ipage)
519{
520 struct f2fs_xattr_entry *entry = NULL;
521 int error;
522 unsigned int size, len;
523 void *base_addr = NULL;
524 int base_size;
525 bool is_inline;
526
527 if (name == NULL)
528 return -EINVAL;
529
530 len = strlen(name);
531 if (len > F2FS_NAME_LEN)
532 return -ERANGE;
533
534 down_read(&F2FS_I(inode)->i_xattr_sem);
535 error = lookup_all_xattrs(inode, ipage, index, len, name,
536 &entry, &base_addr, &base_size, &is_inline);
537 up_read(&F2FS_I(inode)->i_xattr_sem);
538 if (error)
539 return error;
540
541 size = le16_to_cpu(entry->e_value_size);
542
543 if (buffer && size > buffer_size) {
544 error = -ERANGE;
545 goto out;
546 }
547
548 if (buffer) {
549 char *pval = entry->e_name + entry->e_name_len;
550
551 if (base_size - (pval - (char *)base_addr) < size) {
552 error = -ERANGE;
553 goto out;
554 }
555 memcpy(buffer, pval, size);
556 }
557 error = size;
558out:
559 xattr_free(F2FS_I_SB(inode), base_addr, is_inline);
560 return error;
561}
562
563ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
564{
565 struct inode *inode = d_inode(dentry);
566 struct f2fs_xattr_entry *entry;
567 void *base_addr, *last_base_addr;
568 int error;
569 size_t rest = buffer_size;
570
571 down_read(&F2FS_I(inode)->i_xattr_sem);
572 error = read_all_xattrs(inode, NULL, &base_addr);
573 up_read(&F2FS_I(inode)->i_xattr_sem);
574 if (error)
575 return error;
576
577 last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
578
579 list_for_each_xattr(entry, base_addr) {
580 const struct xattr_handler *handler =
581 f2fs_xattr_handler(entry->e_name_index);
582 const char *prefix;
583 size_t prefix_len;
584 size_t size;
585
586 if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
587 (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
588 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
589 inode->i_ino);
590 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
591 error = -EFSCORRUPTED;
592 goto cleanup;
593 }
594
595 if (!handler || (handler->list && !handler->list(dentry)))
596 continue;
597
598 prefix = xattr_prefix(handler);
599 prefix_len = strlen(prefix);
600 size = prefix_len + entry->e_name_len + 1;
601 if (buffer) {
602 if (size > rest) {
603 error = -ERANGE;
604 goto cleanup;
605 }
606 memcpy(buffer, prefix, prefix_len);
607 buffer += prefix_len;
608 memcpy(buffer, entry->e_name, entry->e_name_len);
609 buffer += entry->e_name_len;
610 *buffer++ = 0;
611 }
612 rest -= size;
613 }
614 error = buffer_size - rest;
615cleanup:
616 kfree(base_addr);
617 return error;
618}
619
620static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry,
621 const void *value, size_t size)
622{
623 void *pval = entry->e_name + entry->e_name_len;
624
625 return (le16_to_cpu(entry->e_value_size) == size) &&
626 !memcmp(pval, value, size);
627}
628
629static int __f2fs_setxattr(struct inode *inode, int index,
630 const char *name, const void *value, size_t size,
631 struct page *ipage, int flags)
632{
633 struct f2fs_xattr_entry *here, *last;
634 void *base_addr, *last_base_addr;
635 int found, newsize;
636 size_t len;
637 __u32 new_hsize;
638 int error;
639
640 if (name == NULL)
641 return -EINVAL;
642
643 if (value == NULL)
644 size = 0;
645
646 len = strlen(name);
647
648 if (len > F2FS_NAME_LEN)
649 return -ERANGE;
650
651 if (size > MAX_VALUE_LEN(inode))
652 return -E2BIG;
653
654 error = read_all_xattrs(inode, ipage, &base_addr);
655 if (error)
656 return error;
657
658 last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
659
660 /* find entry with wanted name. */
661 here = __find_xattr(base_addr, last_base_addr, index, len, name);
662 if (!here) {
663 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
664 inode->i_ino);
665 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
666 error = -EFSCORRUPTED;
667 goto exit;
668 }
669
670 found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
671
672 if (found) {
673 if ((flags & XATTR_CREATE)) {
674 error = -EEXIST;
675 goto exit;
676 }
677
678 if (value && f2fs_xattr_value_same(here, value, size))
679 goto same;
680 } else if ((flags & XATTR_REPLACE)) {
681 error = -ENODATA;
682 goto exit;
683 }
684
685 last = here;
686 while (!IS_XATTR_LAST_ENTRY(last))
687 last = XATTR_NEXT_ENTRY(last);
688
689 newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
690
691 /* 1. Check space */
692 if (value) {
693 int free;
694 /*
695 * If value is NULL, it is remove operation.
696 * In case of update operation, we calculate free.
697 */
698 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
699 if (found)
700 free = free + ENTRY_SIZE(here);
701
702 if (unlikely(free < newsize)) {
703 error = -E2BIG;
704 goto exit;
705 }
706 }
707
708 /* 2. Remove old entry */
709 if (found) {
710 /*
711 * If entry is found, remove old entry.
712 * If not found, remove operation is not needed.
713 */
714 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
715 int oldsize = ENTRY_SIZE(here);
716
717 memmove(here, next, (char *)last - (char *)next);
718 last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
719 memset(last, 0, oldsize);
720 }
721
722 new_hsize = (char *)last - (char *)base_addr;
723
724 /* 3. Write new entry */
725 if (value) {
726 char *pval;
727 /*
728 * Before we come here, old entry is removed.
729 * We just write new entry.
730 */
731 last->e_name_index = index;
732 last->e_name_len = len;
733 memcpy(last->e_name, name, len);
734 pval = last->e_name + len;
735 memcpy(pval, value, size);
736 last->e_value_size = cpu_to_le16(size);
737 new_hsize += newsize;
738 }
739
740 error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
741 if (error)
742 goto exit;
743
744 if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
745 !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
746 f2fs_set_encrypted_inode(inode);
747 f2fs_mark_inode_dirty_sync(inode, true);
748 if (!error && S_ISDIR(inode->i_mode))
749 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
750
751same:
752 if (is_inode_flag_set(inode, FI_ACL_MODE)) {
753 inode->i_mode = F2FS_I(inode)->i_acl_mode;
754 inode->i_ctime = current_time(inode);
755 clear_inode_flag(inode, FI_ACL_MODE);
756 }
757
758exit:
759 kfree(base_addr);
760 return error;
761}
762
763int f2fs_setxattr(struct inode *inode, int index, const char *name,
764 const void *value, size_t size,
765 struct page *ipage, int flags)
766{
767 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
768 int err;
769
770 if (unlikely(f2fs_cp_error(sbi)))
771 return -EIO;
772 if (!f2fs_is_checkpoint_ready(sbi))
773 return -ENOSPC;
774
775 err = dquot_initialize(inode);
776 if (err)
777 return err;
778
779 /* this case is only from f2fs_init_inode_metadata */
780 if (ipage)
781 return __f2fs_setxattr(inode, index, name, value,
782 size, ipage, flags);
783 f2fs_balance_fs(sbi, true);
784
785 f2fs_lock_op(sbi);
786 down_write(&F2FS_I(inode)->i_xattr_sem);
787 err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
788 up_write(&F2FS_I(inode)->i_xattr_sem);
789 f2fs_unlock_op(sbi);
790
791 f2fs_update_time(sbi, REQ_TIME);
792 return err;
793}
794
795int f2fs_init_xattr_caches(struct f2fs_sb_info *sbi)
796{
797 dev_t dev = sbi->sb->s_bdev->bd_dev;
798 char slab_name[32];
799
800 sprintf(slab_name, "f2fs_xattr_entry-%u:%u", MAJOR(dev), MINOR(dev));
801
802 sbi->inline_xattr_slab_size = F2FS_OPTION(sbi).inline_xattr_size *
803 sizeof(__le32) + XATTR_PADDING_SIZE;
804
805 sbi->inline_xattr_slab = f2fs_kmem_cache_create(slab_name,
806 sbi->inline_xattr_slab_size);
807 if (!sbi->inline_xattr_slab)
808 return -ENOMEM;
809
810 return 0;
811}
812
813void f2fs_destroy_xattr_caches(struct f2fs_sb_info *sbi)
814{
815 kmem_cache_destroy(sbi->inline_xattr_slab);
816}