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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 f2fs_kmem_cache_alloc(sbi->inline_xattr_slab,
31 GFP_F2FS_ZERO, false, sbi);
32 }
33 *is_inline = false;
34 return f2fs_kzalloc(sbi, size, GFP_NOFS);
35}
36
37static void xattr_free(struct f2fs_sb_info *sbi, void *xattr_addr,
38 bool is_inline)
39{
40 if (is_inline)
41 kmem_cache_free(sbi->inline_xattr_slab, xattr_addr);
42 else
43 kfree(xattr_addr);
44}
45
46static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
47 struct dentry *unused, struct inode *inode,
48 const char *name, void *buffer, size_t size)
49{
50 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
51
52 switch (handler->flags) {
53 case F2FS_XATTR_INDEX_USER:
54 if (!test_opt(sbi, XATTR_USER))
55 return -EOPNOTSUPP;
56 break;
57 case F2FS_XATTR_INDEX_TRUSTED:
58 case F2FS_XATTR_INDEX_SECURITY:
59 break;
60 default:
61 return -EINVAL;
62 }
63 return f2fs_getxattr(inode, handler->flags, name,
64 buffer, size, NULL);
65}
66
67static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
68 struct user_namespace *mnt_userns,
69 struct dentry *unused, struct inode *inode,
70 const char *name, const void *value,
71 size_t size, int flags)
72{
73 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
74
75 switch (handler->flags) {
76 case F2FS_XATTR_INDEX_USER:
77 if (!test_opt(sbi, XATTR_USER))
78 return -EOPNOTSUPP;
79 break;
80 case F2FS_XATTR_INDEX_TRUSTED:
81 case F2FS_XATTR_INDEX_SECURITY:
82 break;
83 default:
84 return -EINVAL;
85 }
86 return f2fs_setxattr(inode, handler->flags, name,
87 value, size, NULL, flags);
88}
89
90static bool f2fs_xattr_user_list(struct dentry *dentry)
91{
92 struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
93
94 return test_opt(sbi, XATTR_USER);
95}
96
97static bool f2fs_xattr_trusted_list(struct dentry *dentry)
98{
99 return capable(CAP_SYS_ADMIN);
100}
101
102static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
103 struct dentry *unused, struct inode *inode,
104 const char *name, void *buffer, size_t size)
105{
106 if (buffer)
107 *((char *)buffer) = F2FS_I(inode)->i_advise;
108 return sizeof(char);
109}
110
111static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
112 struct user_namespace *mnt_userns,
113 struct dentry *unused, struct inode *inode,
114 const char *name, const void *value,
115 size_t size, int flags)
116{
117 unsigned char old_advise = F2FS_I(inode)->i_advise;
118 unsigned char new_advise;
119
120 if (!inode_owner_or_capable(&init_user_ns, inode))
121 return -EPERM;
122 if (value == NULL)
123 return -EINVAL;
124
125 new_advise = *(char *)value;
126 if (new_advise & ~FADVISE_MODIFIABLE_BITS)
127 return -EINVAL;
128
129 new_advise = new_advise & FADVISE_MODIFIABLE_BITS;
130 new_advise |= old_advise & ~FADVISE_MODIFIABLE_BITS;
131
132 F2FS_I(inode)->i_advise = new_advise;
133 f2fs_mark_inode_dirty_sync(inode, true);
134 return 0;
135}
136
137#ifdef CONFIG_F2FS_FS_SECURITY
138static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
139 void *page)
140{
141 const struct xattr *xattr;
142 int err = 0;
143
144 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
145 err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
146 xattr->name, xattr->value,
147 xattr->value_len, (struct page *)page, 0);
148 if (err < 0)
149 break;
150 }
151 return err;
152}
153
154int f2fs_init_security(struct inode *inode, struct inode *dir,
155 const struct qstr *qstr, struct page *ipage)
156{
157 return security_inode_init_security(inode, dir, qstr,
158 &f2fs_initxattrs, ipage);
159}
160#endif
161
162const struct xattr_handler f2fs_xattr_user_handler = {
163 .prefix = XATTR_USER_PREFIX,
164 .flags = F2FS_XATTR_INDEX_USER,
165 .list = f2fs_xattr_user_list,
166 .get = f2fs_xattr_generic_get,
167 .set = f2fs_xattr_generic_set,
168};
169
170const struct xattr_handler f2fs_xattr_trusted_handler = {
171 .prefix = XATTR_TRUSTED_PREFIX,
172 .flags = F2FS_XATTR_INDEX_TRUSTED,
173 .list = f2fs_xattr_trusted_list,
174 .get = f2fs_xattr_generic_get,
175 .set = f2fs_xattr_generic_set,
176};
177
178const struct xattr_handler f2fs_xattr_advise_handler = {
179 .name = F2FS_SYSTEM_ADVISE_NAME,
180 .flags = F2FS_XATTR_INDEX_ADVISE,
181 .get = f2fs_xattr_advise_get,
182 .set = f2fs_xattr_advise_set,
183};
184
185const struct xattr_handler f2fs_xattr_security_handler = {
186 .prefix = XATTR_SECURITY_PREFIX,
187 .flags = F2FS_XATTR_INDEX_SECURITY,
188 .get = f2fs_xattr_generic_get,
189 .set = f2fs_xattr_generic_set,
190};
191
192static const struct xattr_handler *f2fs_xattr_handler_map[] = {
193 [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
194#ifdef CONFIG_F2FS_FS_POSIX_ACL
195 [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
196 [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
197#endif
198 [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
199#ifdef CONFIG_F2FS_FS_SECURITY
200 [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
201#endif
202 [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
203};
204
205const struct xattr_handler *f2fs_xattr_handlers[] = {
206 &f2fs_xattr_user_handler,
207#ifdef CONFIG_F2FS_FS_POSIX_ACL
208 &posix_acl_access_xattr_handler,
209 &posix_acl_default_xattr_handler,
210#endif
211 &f2fs_xattr_trusted_handler,
212#ifdef CONFIG_F2FS_FS_SECURITY
213 &f2fs_xattr_security_handler,
214#endif
215 &f2fs_xattr_advise_handler,
216 NULL,
217};
218
219static inline const struct xattr_handler *f2fs_xattr_handler(int index)
220{
221 const struct xattr_handler *handler = NULL;
222
223 if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
224 handler = f2fs_xattr_handler_map[index];
225 return handler;
226}
227
228static struct f2fs_xattr_entry *__find_xattr(void *base_addr,
229 void *last_base_addr, void **last_addr,
230 int index, size_t len, const char *name)
231{
232 struct f2fs_xattr_entry *entry;
233
234 list_for_each_xattr(entry, base_addr) {
235 if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
236 (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
237 if (last_addr)
238 *last_addr = entry;
239 return NULL;
240 }
241
242 if (entry->e_name_index != index)
243 continue;
244 if (entry->e_name_len != len)
245 continue;
246 if (!memcmp(entry->e_name, name, len))
247 break;
248 }
249 return entry;
250}
251
252static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
253 void *base_addr, void **last_addr, int index,
254 size_t len, const char *name)
255{
256 struct f2fs_xattr_entry *entry;
257 unsigned int inline_size = inline_xattr_size(inode);
258 void *max_addr = base_addr + inline_size;
259
260 entry = __find_xattr(base_addr, max_addr, last_addr, index, len, name);
261 if (!entry)
262 return NULL;
263
264 /* inline xattr header or entry across max inline xattr size */
265 if (IS_XATTR_LAST_ENTRY(entry) &&
266 (void *)entry + sizeof(__u32) > max_addr) {
267 *last_addr = entry;
268 return NULL;
269 }
270 return entry;
271}
272
273static int read_inline_xattr(struct inode *inode, struct page *ipage,
274 void *txattr_addr)
275{
276 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
277 unsigned int inline_size = inline_xattr_size(inode);
278 struct page *page = NULL;
279 void *inline_addr;
280
281 if (ipage) {
282 inline_addr = inline_xattr_addr(inode, ipage);
283 } else {
284 page = f2fs_get_node_page(sbi, inode->i_ino);
285 if (IS_ERR(page))
286 return PTR_ERR(page);
287
288 inline_addr = inline_xattr_addr(inode, page);
289 }
290 memcpy(txattr_addr, inline_addr, inline_size);
291 f2fs_put_page(page, 1);
292
293 return 0;
294}
295
296static int read_xattr_block(struct inode *inode, void *txattr_addr)
297{
298 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
299 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
300 unsigned int inline_size = inline_xattr_size(inode);
301 struct page *xpage;
302 void *xattr_addr;
303
304 /* The inode already has an extended attribute block. */
305 xpage = f2fs_get_node_page(sbi, xnid);
306 if (IS_ERR(xpage))
307 return PTR_ERR(xpage);
308
309 xattr_addr = page_address(xpage);
310 memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE);
311 f2fs_put_page(xpage, 1);
312
313 return 0;
314}
315
316static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
317 unsigned int index, unsigned int len,
318 const char *name, struct f2fs_xattr_entry **xe,
319 void **base_addr, int *base_size,
320 bool *is_inline)
321{
322 void *cur_addr, *txattr_addr, *last_txattr_addr;
323 void *last_addr = NULL;
324 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
325 unsigned int inline_size = inline_xattr_size(inode);
326 int err;
327
328 if (!xnid && !inline_size)
329 return -ENODATA;
330
331 *base_size = XATTR_SIZE(inode) + XATTR_PADDING_SIZE;
332 txattr_addr = xattr_alloc(F2FS_I_SB(inode), *base_size, is_inline);
333 if (!txattr_addr)
334 return -ENOMEM;
335
336 last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(inode);
337
338 /* read from inline xattr */
339 if (inline_size) {
340 err = read_inline_xattr(inode, ipage, txattr_addr);
341 if (err)
342 goto out;
343
344 *xe = __find_inline_xattr(inode, txattr_addr, &last_addr,
345 index, len, name);
346 if (*xe) {
347 *base_size = inline_size;
348 goto check;
349 }
350 }
351
352 /* read from xattr node block */
353 if (xnid) {
354 err = read_xattr_block(inode, txattr_addr);
355 if (err)
356 goto out;
357 }
358
359 if (last_addr)
360 cur_addr = XATTR_HDR(last_addr) - 1;
361 else
362 cur_addr = txattr_addr;
363
364 *xe = __find_xattr(cur_addr, last_txattr_addr, NULL, index, len, name);
365 if (!*xe) {
366 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
367 inode->i_ino);
368 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
369 err = -EFSCORRUPTED;
370 f2fs_handle_error(F2FS_I_SB(inode),
371 ERROR_CORRUPTED_XATTR);
372 goto out;
373 }
374check:
375 if (IS_XATTR_LAST_ENTRY(*xe)) {
376 err = -ENODATA;
377 goto out;
378 }
379
380 *base_addr = txattr_addr;
381 return 0;
382out:
383 xattr_free(F2FS_I_SB(inode), txattr_addr, *is_inline);
384 return err;
385}
386
387static int read_all_xattrs(struct inode *inode, struct page *ipage,
388 void **base_addr)
389{
390 struct f2fs_xattr_header *header;
391 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
392 unsigned int size = VALID_XATTR_BLOCK_SIZE;
393 unsigned int inline_size = inline_xattr_size(inode);
394 void *txattr_addr;
395 int err;
396
397 txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode),
398 inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS);
399 if (!txattr_addr)
400 return -ENOMEM;
401
402 /* read from inline xattr */
403 if (inline_size) {
404 err = read_inline_xattr(inode, ipage, txattr_addr);
405 if (err)
406 goto fail;
407 }
408
409 /* read from xattr node block */
410 if (xnid) {
411 err = read_xattr_block(inode, txattr_addr);
412 if (err)
413 goto fail;
414 }
415
416 header = XATTR_HDR(txattr_addr);
417
418 /* never been allocated xattrs */
419 if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
420 header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
421 header->h_refcount = cpu_to_le32(1);
422 }
423 *base_addr = txattr_addr;
424 return 0;
425fail:
426 kfree(txattr_addr);
427 return err;
428}
429
430static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
431 void *txattr_addr, struct page *ipage)
432{
433 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
434 size_t inline_size = inline_xattr_size(inode);
435 struct page *in_page = NULL;
436 void *xattr_addr;
437 void *inline_addr = NULL;
438 struct page *xpage;
439 nid_t new_nid = 0;
440 int err = 0;
441
442 if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
443 if (!f2fs_alloc_nid(sbi, &new_nid))
444 return -ENOSPC;
445
446 /* write to inline xattr */
447 if (inline_size) {
448 if (ipage) {
449 inline_addr = inline_xattr_addr(inode, ipage);
450 } else {
451 in_page = f2fs_get_node_page(sbi, inode->i_ino);
452 if (IS_ERR(in_page)) {
453 f2fs_alloc_nid_failed(sbi, new_nid);
454 return PTR_ERR(in_page);
455 }
456 inline_addr = inline_xattr_addr(inode, in_page);
457 }
458
459 f2fs_wait_on_page_writeback(ipage ? ipage : in_page,
460 NODE, true, true);
461 /* no need to use xattr node block */
462 if (hsize <= inline_size) {
463 err = f2fs_truncate_xattr_node(inode);
464 f2fs_alloc_nid_failed(sbi, new_nid);
465 if (err) {
466 f2fs_put_page(in_page, 1);
467 return err;
468 }
469 memcpy(inline_addr, txattr_addr, inline_size);
470 set_page_dirty(ipage ? ipage : in_page);
471 goto in_page_out;
472 }
473 }
474
475 /* write to xattr node block */
476 if (F2FS_I(inode)->i_xattr_nid) {
477 xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
478 if (IS_ERR(xpage)) {
479 err = PTR_ERR(xpage);
480 f2fs_alloc_nid_failed(sbi, new_nid);
481 goto in_page_out;
482 }
483 f2fs_bug_on(sbi, new_nid);
484 f2fs_wait_on_page_writeback(xpage, NODE, true, true);
485 } else {
486 struct dnode_of_data dn;
487
488 set_new_dnode(&dn, inode, NULL, NULL, new_nid);
489 xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET);
490 if (IS_ERR(xpage)) {
491 err = PTR_ERR(xpage);
492 f2fs_alloc_nid_failed(sbi, new_nid);
493 goto in_page_out;
494 }
495 f2fs_alloc_nid_done(sbi, new_nid);
496 }
497 xattr_addr = page_address(xpage);
498
499 if (inline_size)
500 memcpy(inline_addr, txattr_addr, inline_size);
501 memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
502
503 if (inline_size)
504 set_page_dirty(ipage ? ipage : in_page);
505 set_page_dirty(xpage);
506
507 f2fs_put_page(xpage, 1);
508in_page_out:
509 f2fs_put_page(in_page, 1);
510 return err;
511}
512
513int f2fs_getxattr(struct inode *inode, int index, const char *name,
514 void *buffer, size_t buffer_size, struct page *ipage)
515{
516 struct f2fs_xattr_entry *entry = NULL;
517 int error;
518 unsigned int size, len;
519 void *base_addr = NULL;
520 int base_size;
521 bool is_inline;
522
523 if (name == NULL)
524 return -EINVAL;
525
526 len = strlen(name);
527 if (len > F2FS_NAME_LEN)
528 return -ERANGE;
529
530 f2fs_down_read(&F2FS_I(inode)->i_xattr_sem);
531 error = lookup_all_xattrs(inode, ipage, index, len, name,
532 &entry, &base_addr, &base_size, &is_inline);
533 f2fs_up_read(&F2FS_I(inode)->i_xattr_sem);
534 if (error)
535 return error;
536
537 size = le16_to_cpu(entry->e_value_size);
538
539 if (buffer && size > buffer_size) {
540 error = -ERANGE;
541 goto out;
542 }
543
544 if (buffer) {
545 char *pval = entry->e_name + entry->e_name_len;
546
547 if (base_size - (pval - (char *)base_addr) < size) {
548 error = -ERANGE;
549 goto out;
550 }
551 memcpy(buffer, pval, size);
552 }
553 error = size;
554out:
555 xattr_free(F2FS_I_SB(inode), base_addr, is_inline);
556 return error;
557}
558
559ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
560{
561 struct inode *inode = d_inode(dentry);
562 struct f2fs_xattr_entry *entry;
563 void *base_addr, *last_base_addr;
564 int error;
565 size_t rest = buffer_size;
566
567 f2fs_down_read(&F2FS_I(inode)->i_xattr_sem);
568 error = read_all_xattrs(inode, NULL, &base_addr);
569 f2fs_up_read(&F2FS_I(inode)->i_xattr_sem);
570 if (error)
571 return error;
572
573 last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
574
575 list_for_each_xattr(entry, base_addr) {
576 const struct xattr_handler *handler =
577 f2fs_xattr_handler(entry->e_name_index);
578 const char *prefix;
579 size_t prefix_len;
580 size_t size;
581
582 if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
583 (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
584 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
585 inode->i_ino);
586 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
587 error = -EFSCORRUPTED;
588 f2fs_handle_error(F2FS_I_SB(inode),
589 ERROR_CORRUPTED_XATTR);
590 goto cleanup;
591 }
592
593 if (!handler || (handler->list && !handler->list(dentry)))
594 continue;
595
596 prefix = xattr_prefix(handler);
597 prefix_len = strlen(prefix);
598 size = prefix_len + entry->e_name_len + 1;
599 if (buffer) {
600 if (size > rest) {
601 error = -ERANGE;
602 goto cleanup;
603 }
604 memcpy(buffer, prefix, prefix_len);
605 buffer += prefix_len;
606 memcpy(buffer, entry->e_name, entry->e_name_len);
607 buffer += entry->e_name_len;
608 *buffer++ = 0;
609 }
610 rest -= size;
611 }
612 error = buffer_size - rest;
613cleanup:
614 kfree(base_addr);
615 return error;
616}
617
618static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry,
619 const void *value, size_t size)
620{
621 void *pval = entry->e_name + entry->e_name_len;
622
623 return (le16_to_cpu(entry->e_value_size) == size) &&
624 !memcmp(pval, value, size);
625}
626
627static int __f2fs_setxattr(struct inode *inode, int index,
628 const char *name, const void *value, size_t size,
629 struct page *ipage, int flags)
630{
631 struct f2fs_xattr_entry *here, *last;
632 void *base_addr, *last_base_addr;
633 int found, newsize;
634 size_t len;
635 __u32 new_hsize;
636 int error;
637
638 if (name == NULL)
639 return -EINVAL;
640
641 if (value == NULL)
642 size = 0;
643
644 len = strlen(name);
645
646 if (len > F2FS_NAME_LEN)
647 return -ERANGE;
648
649 if (size > MAX_VALUE_LEN(inode))
650 return -E2BIG;
651
652 error = read_all_xattrs(inode, ipage, &base_addr);
653 if (error)
654 return error;
655
656 last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
657
658 /* find entry with wanted name. */
659 here = __find_xattr(base_addr, last_base_addr, NULL, index, len, name);
660 if (!here) {
661 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
662 inode->i_ino);
663 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
664 error = -EFSCORRUPTED;
665 f2fs_handle_error(F2FS_I_SB(inode),
666 ERROR_CORRUPTED_XATTR);
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 if ((void *)(last) + sizeof(__u32) > last_base_addr ||
688 (void *)XATTR_NEXT_ENTRY(last) > last_base_addr) {
689 f2fs_err(F2FS_I_SB(inode), "inode (%lu) has invalid last xattr entry, entry_size: %zu",
690 inode->i_ino, ENTRY_SIZE(last));
691 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
692 error = -EFSCORRUPTED;
693 f2fs_handle_error(F2FS_I_SB(inode),
694 ERROR_CORRUPTED_XATTR);
695 goto exit;
696 }
697 last = XATTR_NEXT_ENTRY(last);
698 }
699
700 newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
701
702 /* 1. Check space */
703 if (value) {
704 int free;
705 /*
706 * If value is NULL, it is remove operation.
707 * In case of update operation, we calculate free.
708 */
709 free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
710 if (found)
711 free = free + ENTRY_SIZE(here);
712
713 if (unlikely(free < newsize)) {
714 error = -E2BIG;
715 goto exit;
716 }
717 }
718
719 /* 2. Remove old entry */
720 if (found) {
721 /*
722 * If entry is found, remove old entry.
723 * If not found, remove operation is not needed.
724 */
725 struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
726 int oldsize = ENTRY_SIZE(here);
727
728 memmove(here, next, (char *)last - (char *)next);
729 last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
730 memset(last, 0, oldsize);
731 }
732
733 new_hsize = (char *)last - (char *)base_addr;
734
735 /* 3. Write new entry */
736 if (value) {
737 char *pval;
738 /*
739 * Before we come here, old entry is removed.
740 * We just write new entry.
741 */
742 last->e_name_index = index;
743 last->e_name_len = len;
744 memcpy(last->e_name, name, len);
745 pval = last->e_name + len;
746 memcpy(pval, value, size);
747 last->e_value_size = cpu_to_le16(size);
748 new_hsize += newsize;
749 }
750
751 error = write_all_xattrs(inode, new_hsize, base_addr, ipage);
752 if (error)
753 goto exit;
754
755 if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
756 !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
757 f2fs_set_encrypted_inode(inode);
758 f2fs_mark_inode_dirty_sync(inode, true);
759 if (!error && S_ISDIR(inode->i_mode))
760 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
761
762same:
763 if (is_inode_flag_set(inode, FI_ACL_MODE)) {
764 inode->i_mode = F2FS_I(inode)->i_acl_mode;
765 inode->i_ctime = current_time(inode);
766 clear_inode_flag(inode, FI_ACL_MODE);
767 }
768
769exit:
770 kfree(base_addr);
771 return error;
772}
773
774int f2fs_setxattr(struct inode *inode, int index, const char *name,
775 const void *value, size_t size,
776 struct page *ipage, int flags)
777{
778 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
779 int err;
780
781 if (unlikely(f2fs_cp_error(sbi)))
782 return -EIO;
783 if (!f2fs_is_checkpoint_ready(sbi))
784 return -ENOSPC;
785
786 err = f2fs_dquot_initialize(inode);
787 if (err)
788 return err;
789
790 /* this case is only from f2fs_init_inode_metadata */
791 if (ipage)
792 return __f2fs_setxattr(inode, index, name, value,
793 size, ipage, flags);
794 f2fs_balance_fs(sbi, true);
795
796 f2fs_lock_op(sbi);
797 f2fs_down_write(&F2FS_I(inode)->i_xattr_sem);
798 err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags);
799 f2fs_up_write(&F2FS_I(inode)->i_xattr_sem);
800 f2fs_unlock_op(sbi);
801
802 f2fs_update_time(sbi, REQ_TIME);
803 return err;
804}
805
806int f2fs_init_xattr_caches(struct f2fs_sb_info *sbi)
807{
808 dev_t dev = sbi->sb->s_bdev->bd_dev;
809 char slab_name[32];
810
811 sprintf(slab_name, "f2fs_xattr_entry-%u:%u", MAJOR(dev), MINOR(dev));
812
813 sbi->inline_xattr_slab_size = F2FS_OPTION(sbi).inline_xattr_size *
814 sizeof(__le32) + XATTR_PADDING_SIZE;
815
816 sbi->inline_xattr_slab = f2fs_kmem_cache_create(slab_name,
817 sbi->inline_xattr_slab_size);
818 if (!sbi->inline_xattr_slab)
819 return -ENOMEM;
820
821 return 0;
822}
823
824void f2fs_destroy_xattr_caches(struct f2fs_sb_info *sbi)
825{
826 kmem_cache_destroy(sbi->inline_xattr_slab);
827}