Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
af48b85b JK |
2 | * fs/f2fs/xattr.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * Portions of this code from linux/fs/ext2/xattr.c | |
8 | * | |
9 | * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de> | |
10 | * | |
11 | * Fix by Harrison Xing <harrison@mountainviewdata.com>. | |
12 | * Extended attributes for symlinks and special files added per | |
13 | * suggestion of Luka Renko <luka.renko@hermes.si>. | |
14 | * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>, | |
15 | * Red Hat Inc. | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License version 2 as | |
19 | * published by the Free Software Foundation. | |
20 | */ | |
21 | #include <linux/rwsem.h> | |
22 | #include <linux/f2fs_fs.h> | |
8ae8f162 | 23 | #include <linux/security.h> |
af48b85b JK |
24 | #include "f2fs.h" |
25 | #include "xattr.h" | |
26 | ||
27 | static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list, | |
28 | size_t list_size, const char *name, size_t name_len, int type) | |
29 | { | |
30 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); | |
31 | int total_len, prefix_len = 0; | |
32 | const char *prefix = NULL; | |
33 | ||
34 | switch (type) { | |
35 | case F2FS_XATTR_INDEX_USER: | |
36 | if (!test_opt(sbi, XATTR_USER)) | |
37 | return -EOPNOTSUPP; | |
38 | prefix = XATTR_USER_PREFIX; | |
39 | prefix_len = XATTR_USER_PREFIX_LEN; | |
40 | break; | |
41 | case F2FS_XATTR_INDEX_TRUSTED: | |
42 | if (!capable(CAP_SYS_ADMIN)) | |
43 | return -EPERM; | |
44 | prefix = XATTR_TRUSTED_PREFIX; | |
45 | prefix_len = XATTR_TRUSTED_PREFIX_LEN; | |
46 | break; | |
8ae8f162 JK |
47 | case F2FS_XATTR_INDEX_SECURITY: |
48 | prefix = XATTR_SECURITY_PREFIX; | |
49 | prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
50 | break; | |
af48b85b JK |
51 | default: |
52 | return -EINVAL; | |
53 | } | |
54 | ||
55 | total_len = prefix_len + name_len + 1; | |
56 | if (list && total_len <= list_size) { | |
57 | memcpy(list, prefix, prefix_len); | |
8ae8f162 | 58 | memcpy(list + prefix_len, name, name_len); |
af48b85b JK |
59 | list[prefix_len + name_len] = '\0'; |
60 | } | |
61 | return total_len; | |
62 | } | |
63 | ||
64 | static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name, | |
65 | void *buffer, size_t size, int type) | |
66 | { | |
67 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); | |
68 | ||
69 | switch (type) { | |
70 | case F2FS_XATTR_INDEX_USER: | |
71 | if (!test_opt(sbi, XATTR_USER)) | |
72 | return -EOPNOTSUPP; | |
73 | break; | |
74 | case F2FS_XATTR_INDEX_TRUSTED: | |
75 | if (!capable(CAP_SYS_ADMIN)) | |
76 | return -EPERM; | |
77 | break; | |
8ae8f162 JK |
78 | case F2FS_XATTR_INDEX_SECURITY: |
79 | break; | |
af48b85b JK |
80 | default: |
81 | return -EINVAL; | |
82 | } | |
83 | if (strcmp(name, "") == 0) | |
84 | return -EINVAL; | |
8ae8f162 | 85 | return f2fs_getxattr(dentry->d_inode, type, name, buffer, size); |
af48b85b JK |
86 | } |
87 | ||
88 | static int f2fs_xattr_generic_set(struct dentry *dentry, const char *name, | |
89 | const void *value, size_t size, int flags, int type) | |
90 | { | |
91 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); | |
92 | ||
93 | switch (type) { | |
94 | case F2FS_XATTR_INDEX_USER: | |
95 | if (!test_opt(sbi, XATTR_USER)) | |
96 | return -EOPNOTSUPP; | |
97 | break; | |
98 | case F2FS_XATTR_INDEX_TRUSTED: | |
99 | if (!capable(CAP_SYS_ADMIN)) | |
100 | return -EPERM; | |
101 | break; | |
8ae8f162 JK |
102 | case F2FS_XATTR_INDEX_SECURITY: |
103 | break; | |
af48b85b JK |
104 | default: |
105 | return -EINVAL; | |
106 | } | |
107 | if (strcmp(name, "") == 0) | |
108 | return -EINVAL; | |
109 | ||
8ae8f162 | 110 | return f2fs_setxattr(dentry->d_inode, type, name, value, size, NULL); |
af48b85b JK |
111 | } |
112 | ||
573ea5fc JK |
113 | static size_t f2fs_xattr_advise_list(struct dentry *dentry, char *list, |
114 | size_t list_size, const char *name, size_t name_len, int type) | |
115 | { | |
116 | const char *xname = F2FS_SYSTEM_ADVISE_PREFIX; | |
117 | size_t size; | |
118 | ||
119 | if (type != F2FS_XATTR_INDEX_ADVISE) | |
120 | return 0; | |
121 | ||
122 | size = strlen(xname) + 1; | |
123 | if (list && size <= list_size) | |
124 | memcpy(list, xname, size); | |
125 | return size; | |
126 | } | |
127 | ||
128 | static int f2fs_xattr_advise_get(struct dentry *dentry, const char *name, | |
129 | void *buffer, size_t size, int type) | |
130 | { | |
131 | struct inode *inode = dentry->d_inode; | |
132 | ||
133 | if (strcmp(name, "") != 0) | |
134 | return -EINVAL; | |
135 | ||
136 | *((char *)buffer) = F2FS_I(inode)->i_advise; | |
137 | return sizeof(char); | |
138 | } | |
139 | ||
140 | static int f2fs_xattr_advise_set(struct dentry *dentry, const char *name, | |
141 | const void *value, size_t size, int flags, int type) | |
142 | { | |
143 | struct inode *inode = dentry->d_inode; | |
144 | ||
145 | if (strcmp(name, "") != 0) | |
146 | return -EINVAL; | |
147 | if (!inode_owner_or_capable(inode)) | |
148 | return -EPERM; | |
149 | if (value == NULL) | |
150 | return -EINVAL; | |
151 | ||
152 | F2FS_I(inode)->i_advise |= *(char *)value; | |
153 | return 0; | |
154 | } | |
155 | ||
8ae8f162 JK |
156 | #ifdef CONFIG_F2FS_FS_SECURITY |
157 | static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array, | |
158 | void *page) | |
159 | { | |
160 | const struct xattr *xattr; | |
161 | int err = 0; | |
162 | ||
163 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
164 | err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY, | |
165 | xattr->name, xattr->value, | |
166 | xattr->value_len, (struct page *)page); | |
167 | if (err < 0) | |
168 | break; | |
169 | } | |
170 | return err; | |
171 | } | |
172 | ||
173 | int f2fs_init_security(struct inode *inode, struct inode *dir, | |
174 | const struct qstr *qstr, struct page *ipage) | |
175 | { | |
176 | return security_inode_init_security(inode, dir, qstr, | |
177 | &f2fs_initxattrs, ipage); | |
178 | } | |
179 | #endif | |
180 | ||
af48b85b JK |
181 | const struct xattr_handler f2fs_xattr_user_handler = { |
182 | .prefix = XATTR_USER_PREFIX, | |
183 | .flags = F2FS_XATTR_INDEX_USER, | |
184 | .list = f2fs_xattr_generic_list, | |
185 | .get = f2fs_xattr_generic_get, | |
186 | .set = f2fs_xattr_generic_set, | |
187 | }; | |
188 | ||
189 | const struct xattr_handler f2fs_xattr_trusted_handler = { | |
190 | .prefix = XATTR_TRUSTED_PREFIX, | |
191 | .flags = F2FS_XATTR_INDEX_TRUSTED, | |
192 | .list = f2fs_xattr_generic_list, | |
193 | .get = f2fs_xattr_generic_get, | |
194 | .set = f2fs_xattr_generic_set, | |
195 | }; | |
196 | ||
573ea5fc JK |
197 | const struct xattr_handler f2fs_xattr_advise_handler = { |
198 | .prefix = F2FS_SYSTEM_ADVISE_PREFIX, | |
199 | .flags = F2FS_XATTR_INDEX_ADVISE, | |
200 | .list = f2fs_xattr_advise_list, | |
201 | .get = f2fs_xattr_advise_get, | |
202 | .set = f2fs_xattr_advise_set, | |
203 | }; | |
204 | ||
8ae8f162 JK |
205 | const struct xattr_handler f2fs_xattr_security_handler = { |
206 | .prefix = XATTR_SECURITY_PREFIX, | |
207 | .flags = F2FS_XATTR_INDEX_SECURITY, | |
208 | .list = f2fs_xattr_generic_list, | |
209 | .get = f2fs_xattr_generic_get, | |
210 | .set = f2fs_xattr_generic_set, | |
211 | }; | |
212 | ||
af48b85b JK |
213 | static const struct xattr_handler *f2fs_xattr_handler_map[] = { |
214 | [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler, | |
215 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
216 | [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &f2fs_xattr_acl_access_handler, | |
217 | [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &f2fs_xattr_acl_default_handler, | |
218 | #endif | |
219 | [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler, | |
8ae8f162 JK |
220 | #ifdef CONFIG_F2FS_FS_SECURITY |
221 | [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler, | |
222 | #endif | |
af48b85b JK |
223 | [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler, |
224 | }; | |
225 | ||
226 | const struct xattr_handler *f2fs_xattr_handlers[] = { | |
227 | &f2fs_xattr_user_handler, | |
228 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
229 | &f2fs_xattr_acl_access_handler, | |
230 | &f2fs_xattr_acl_default_handler, | |
231 | #endif | |
232 | &f2fs_xattr_trusted_handler, | |
8ae8f162 JK |
233 | #ifdef CONFIG_F2FS_FS_SECURITY |
234 | &f2fs_xattr_security_handler, | |
235 | #endif | |
af48b85b JK |
236 | &f2fs_xattr_advise_handler, |
237 | NULL, | |
238 | }; | |
239 | ||
240 | static inline const struct xattr_handler *f2fs_xattr_handler(int name_index) | |
241 | { | |
242 | const struct xattr_handler *handler = NULL; | |
243 | ||
244 | if (name_index > 0 && name_index < ARRAY_SIZE(f2fs_xattr_handler_map)) | |
245 | handler = f2fs_xattr_handler_map[name_index]; | |
246 | return handler; | |
247 | } | |
248 | ||
dd9cfe23 JK |
249 | static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int name_index, |
250 | size_t name_len, const char *name) | |
251 | { | |
252 | struct f2fs_xattr_entry *entry; | |
253 | ||
254 | list_for_each_xattr(entry, base_addr) { | |
255 | if (entry->e_name_index != name_index) | |
256 | continue; | |
257 | if (entry->e_name_len != name_len) | |
258 | continue; | |
259 | if (!memcmp(entry->e_name, name, name_len)) | |
260 | break; | |
261 | } | |
262 | return entry; | |
263 | } | |
264 | ||
65985d93 JK |
265 | static void *read_all_xattrs(struct inode *inode, struct page *ipage) |
266 | { | |
267 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
268 | struct f2fs_xattr_header *header; | |
269 | size_t size = PAGE_SIZE, inline_size = 0; | |
270 | void *txattr_addr; | |
271 | ||
272 | inline_size = inline_xattr_size(inode); | |
273 | ||
274 | txattr_addr = kzalloc(inline_size + size, GFP_KERNEL); | |
275 | if (!txattr_addr) | |
276 | return NULL; | |
277 | ||
278 | /* read from inline xattr */ | |
279 | if (inline_size) { | |
280 | struct page *page = NULL; | |
281 | void *inline_addr; | |
282 | ||
283 | if (ipage) { | |
284 | inline_addr = inline_xattr_addr(ipage); | |
285 | } else { | |
286 | page = get_node_page(sbi, inode->i_ino); | |
287 | if (IS_ERR(page)) | |
288 | goto fail; | |
289 | inline_addr = inline_xattr_addr(page); | |
290 | } | |
291 | memcpy(txattr_addr, inline_addr, inline_size); | |
292 | f2fs_put_page(page, 1); | |
293 | } | |
294 | ||
295 | /* read from xattr node block */ | |
296 | if (F2FS_I(inode)->i_xattr_nid) { | |
297 | struct page *xpage; | |
298 | void *xattr_addr; | |
299 | ||
300 | /* The inode already has an extended attribute block. */ | |
301 | xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); | |
302 | if (IS_ERR(xpage)) | |
303 | goto fail; | |
304 | ||
305 | xattr_addr = page_address(xpage); | |
306 | memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE); | |
307 | f2fs_put_page(xpage, 1); | |
308 | } | |
309 | ||
310 | header = XATTR_HDR(txattr_addr); | |
311 | ||
312 | /* never been allocated xattrs */ | |
313 | if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { | |
314 | header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); | |
315 | header->h_refcount = cpu_to_le32(1); | |
316 | } | |
317 | return txattr_addr; | |
318 | fail: | |
319 | kzfree(txattr_addr); | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | static inline int write_all_xattrs(struct inode *inode, __u32 hsize, | |
324 | void *txattr_addr, struct page *ipage) | |
325 | { | |
326 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
327 | size_t inline_size = 0; | |
328 | void *xattr_addr; | |
329 | struct page *xpage; | |
330 | nid_t new_nid = 0; | |
331 | int err; | |
332 | ||
333 | inline_size = inline_xattr_size(inode); | |
334 | ||
335 | if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) | |
336 | if (!alloc_nid(sbi, &new_nid)) | |
337 | return -ENOSPC; | |
338 | ||
339 | /* write to inline xattr */ | |
340 | if (inline_size) { | |
341 | struct page *page = NULL; | |
342 | void *inline_addr; | |
343 | ||
344 | if (ipage) { | |
345 | inline_addr = inline_xattr_addr(ipage); | |
346 | } else { | |
347 | page = get_node_page(sbi, inode->i_ino); | |
348 | if (IS_ERR(page)) { | |
349 | alloc_nid_failed(sbi, new_nid); | |
350 | return PTR_ERR(page); | |
351 | } | |
352 | inline_addr = inline_xattr_addr(page); | |
353 | } | |
354 | memcpy(inline_addr, txattr_addr, inline_size); | |
355 | f2fs_put_page(page, 1); | |
356 | ||
357 | /* no need to use xattr node block */ | |
358 | if (hsize <= inline_size) { | |
359 | err = truncate_xattr_node(inode, ipage); | |
360 | alloc_nid_failed(sbi, new_nid); | |
361 | return err; | |
362 | } | |
363 | } | |
364 | ||
365 | /* write to xattr node block */ | |
366 | if (F2FS_I(inode)->i_xattr_nid) { | |
367 | xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); | |
368 | if (IS_ERR(xpage)) { | |
369 | alloc_nid_failed(sbi, new_nid); | |
370 | return PTR_ERR(xpage); | |
371 | } | |
372 | BUG_ON(new_nid); | |
373 | } else { | |
374 | struct dnode_of_data dn; | |
375 | set_new_dnode(&dn, inode, NULL, NULL, new_nid); | |
376 | xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage); | |
377 | if (IS_ERR(xpage)) { | |
378 | alloc_nid_failed(sbi, new_nid); | |
379 | return PTR_ERR(xpage); | |
380 | } | |
381 | alloc_nid_done(sbi, new_nid); | |
382 | } | |
383 | ||
384 | xattr_addr = page_address(xpage); | |
385 | memcpy(xattr_addr, txattr_addr + inline_size, PAGE_SIZE - | |
386 | sizeof(struct node_footer)); | |
387 | set_page_dirty(xpage); | |
388 | f2fs_put_page(xpage, 1); | |
389 | ||
390 | /* need to checkpoint during fsync */ | |
391 | F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); | |
392 | return 0; | |
393 | } | |
394 | ||
af48b85b JK |
395 | int f2fs_getxattr(struct inode *inode, int name_index, const char *name, |
396 | void *buffer, size_t buffer_size) | |
397 | { | |
af48b85b | 398 | struct f2fs_xattr_entry *entry; |
65985d93 | 399 | void *base_addr; |
dd9cfe23 | 400 | int error = 0; |
9836b8b9 | 401 | size_t value_len, name_len; |
af48b85b JK |
402 | |
403 | if (name == NULL) | |
404 | return -EINVAL; | |
405 | name_len = strlen(name); | |
406 | ||
65985d93 JK |
407 | base_addr = read_all_xattrs(inode, NULL); |
408 | if (!base_addr) | |
409 | return -ENOMEM; | |
af48b85b | 410 | |
65985d93 | 411 | entry = __find_xattr(base_addr, name_index, name_len, name); |
dd9cfe23 | 412 | if (IS_XATTR_LAST_ENTRY(entry)) { |
af48b85b JK |
413 | error = -ENODATA; |
414 | goto cleanup; | |
415 | } | |
416 | ||
417 | value_len = le16_to_cpu(entry->e_value_size); | |
418 | ||
419 | if (buffer && value_len > buffer_size) { | |
420 | error = -ERANGE; | |
421 | goto cleanup; | |
422 | } | |
423 | ||
424 | if (buffer) { | |
425 | char *pval = entry->e_name + entry->e_name_len; | |
426 | memcpy(buffer, pval, value_len); | |
427 | } | |
428 | error = value_len; | |
429 | ||
430 | cleanup: | |
65985d93 | 431 | kzfree(base_addr); |
af48b85b JK |
432 | return error; |
433 | } | |
434 | ||
435 | ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) | |
436 | { | |
437 | struct inode *inode = dentry->d_inode; | |
af48b85b | 438 | struct f2fs_xattr_entry *entry; |
af48b85b JK |
439 | void *base_addr; |
440 | int error = 0; | |
441 | size_t rest = buffer_size; | |
442 | ||
65985d93 JK |
443 | base_addr = read_all_xattrs(inode, NULL); |
444 | if (!base_addr) | |
445 | return -ENOMEM; | |
af48b85b JK |
446 | |
447 | list_for_each_xattr(entry, base_addr) { | |
448 | const struct xattr_handler *handler = | |
449 | f2fs_xattr_handler(entry->e_name_index); | |
450 | size_t size; | |
451 | ||
452 | if (!handler) | |
453 | continue; | |
454 | ||
455 | size = handler->list(dentry, buffer, rest, entry->e_name, | |
456 | entry->e_name_len, handler->flags); | |
457 | if (buffer && size > rest) { | |
458 | error = -ERANGE; | |
459 | goto cleanup; | |
460 | } | |
461 | ||
462 | if (buffer) | |
463 | buffer += size; | |
464 | rest -= size; | |
465 | } | |
466 | error = buffer_size - rest; | |
467 | cleanup: | |
65985d93 | 468 | kzfree(base_addr); |
af48b85b JK |
469 | return error; |
470 | } | |
471 | ||
472 | int f2fs_setxattr(struct inode *inode, int name_index, const char *name, | |
8ae8f162 | 473 | const void *value, size_t value_len, struct page *ipage) |
af48b85b JK |
474 | { |
475 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
476 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
af48b85b | 477 | struct f2fs_xattr_entry *here, *last; |
af48b85b | 478 | void *base_addr; |
65985d93 | 479 | int found, newsize; |
9836b8b9 | 480 | size_t name_len; |
39936837 | 481 | int ilock; |
65985d93 JK |
482 | __u32 new_hsize; |
483 | int error = -ENOMEM; | |
af48b85b JK |
484 | |
485 | if (name == NULL) | |
486 | return -EINVAL; | |
af48b85b JK |
487 | |
488 | if (value == NULL) | |
489 | value_len = 0; | |
490 | ||
7c909772 NJ |
491 | name_len = strlen(name); |
492 | ||
65985d93 | 493 | if (name_len > F2FS_NAME_LEN || value_len > MAX_VALUE_LEN(inode)) |
af48b85b JK |
494 | return -ERANGE; |
495 | ||
7d82db83 JK |
496 | f2fs_balance_fs(sbi); |
497 | ||
39936837 JK |
498 | ilock = mutex_lock_op(sbi); |
499 | ||
65985d93 JK |
500 | base_addr = read_all_xattrs(inode, ipage); |
501 | if (!base_addr) | |
502 | goto exit; | |
af48b85b JK |
503 | |
504 | /* find entry with wanted name. */ | |
dd9cfe23 | 505 | here = __find_xattr(base_addr, name_index, name_len, name); |
af48b85b | 506 | |
dd9cfe23 | 507 | found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; |
af48b85b JK |
508 | last = here; |
509 | ||
510 | while (!IS_XATTR_LAST_ENTRY(last)) | |
511 | last = XATTR_NEXT_ENTRY(last); | |
512 | ||
513 | newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + | |
514 | name_len + value_len); | |
515 | ||
516 | /* 1. Check space */ | |
517 | if (value) { | |
65985d93 JK |
518 | int free; |
519 | /* | |
520 | * If value is NULL, it is remove operation. | |
af48b85b JK |
521 | * In case of update operation, we caculate free. |
522 | */ | |
65985d93 | 523 | free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); |
af48b85b JK |
524 | if (found) |
525 | free = free - ENTRY_SIZE(here); | |
526 | ||
527 | if (free < newsize) { | |
528 | error = -ENOSPC; | |
65985d93 | 529 | goto exit; |
af48b85b JK |
530 | } |
531 | } | |
532 | ||
533 | /* 2. Remove old entry */ | |
534 | if (found) { | |
65985d93 JK |
535 | /* |
536 | * If entry is found, remove old entry. | |
af48b85b JK |
537 | * If not found, remove operation is not needed. |
538 | */ | |
539 | struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); | |
540 | int oldsize = ENTRY_SIZE(here); | |
541 | ||
542 | memmove(here, next, (char *)last - (char *)next); | |
543 | last = (struct f2fs_xattr_entry *)((char *)last - oldsize); | |
544 | memset(last, 0, oldsize); | |
545 | } | |
546 | ||
65985d93 JK |
547 | new_hsize = (char *)last - (char *)base_addr; |
548 | ||
af48b85b JK |
549 | /* 3. Write new entry */ |
550 | if (value) { | |
65985d93 JK |
551 | char *pval; |
552 | /* | |
553 | * Before we come here, old entry is removed. | |
554 | * We just write new entry. | |
555 | */ | |
af48b85b JK |
556 | memset(last, 0, newsize); |
557 | last->e_name_index = name_index; | |
558 | last->e_name_len = name_len; | |
559 | memcpy(last->e_name, name, name_len); | |
560 | pval = last->e_name + name_len; | |
561 | memcpy(pval, value, value_len); | |
562 | last->e_value_size = cpu_to_le16(value_len); | |
65985d93 | 563 | new_hsize += newsize; |
af48b85b JK |
564 | } |
565 | ||
65985d93 JK |
566 | error = write_all_xattrs(inode, new_hsize, base_addr, ipage); |
567 | if (error) | |
568 | goto exit; | |
af48b85b JK |
569 | |
570 | if (is_inode_flag_set(fi, FI_ACL_MODE)) { | |
571 | inode->i_mode = fi->i_acl_mode; | |
572 | inode->i_ctime = CURRENT_TIME; | |
573 | clear_inode_flag(fi, FI_ACL_MODE); | |
574 | } | |
e518ff81 | 575 | |
8ae8f162 JK |
576 | if (ipage) |
577 | update_inode(inode, ipage); | |
578 | else | |
579 | update_inode_page(inode); | |
7c909772 | 580 | exit: |
39936837 | 581 | mutex_unlock_op(sbi, ilock); |
65985d93 | 582 | kzfree(base_addr); |
af48b85b JK |
583 | return error; |
584 | } |