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> |
a6dda0e6 | 24 | #include <linux/posix_acl_xattr.h> |
af48b85b JK |
25 | #include "f2fs.h" |
26 | #include "xattr.h" | |
27 | ||
28 | static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list, | |
e1123268 | 29 | size_t list_size, const char *name, size_t len, int type) |
af48b85b JK |
30 | { |
31 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); | |
32 | int total_len, prefix_len = 0; | |
33 | const char *prefix = NULL; | |
34 | ||
35 | switch (type) { | |
36 | case F2FS_XATTR_INDEX_USER: | |
37 | if (!test_opt(sbi, XATTR_USER)) | |
38 | return -EOPNOTSUPP; | |
39 | prefix = XATTR_USER_PREFIX; | |
40 | prefix_len = XATTR_USER_PREFIX_LEN; | |
41 | break; | |
42 | case F2FS_XATTR_INDEX_TRUSTED: | |
43 | if (!capable(CAP_SYS_ADMIN)) | |
44 | return -EPERM; | |
45 | prefix = XATTR_TRUSTED_PREFIX; | |
46 | prefix_len = XATTR_TRUSTED_PREFIX_LEN; | |
47 | break; | |
8ae8f162 JK |
48 | case F2FS_XATTR_INDEX_SECURITY: |
49 | prefix = XATTR_SECURITY_PREFIX; | |
50 | prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
51 | break; | |
af48b85b JK |
52 | default: |
53 | return -EINVAL; | |
54 | } | |
55 | ||
e1123268 | 56 | total_len = prefix_len + len + 1; |
af48b85b JK |
57 | if (list && total_len <= list_size) { |
58 | memcpy(list, prefix, prefix_len); | |
e1123268 JK |
59 | memcpy(list + prefix_len, name, len); |
60 | list[prefix_len + len] = '\0'; | |
af48b85b JK |
61 | } |
62 | return total_len; | |
63 | } | |
64 | ||
65 | static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name, | |
66 | void *buffer, size_t size, int type) | |
67 | { | |
68 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); | |
69 | ||
70 | switch (type) { | |
71 | case F2FS_XATTR_INDEX_USER: | |
72 | if (!test_opt(sbi, XATTR_USER)) | |
73 | return -EOPNOTSUPP; | |
74 | break; | |
75 | case F2FS_XATTR_INDEX_TRUSTED: | |
76 | if (!capable(CAP_SYS_ADMIN)) | |
77 | return -EPERM; | |
78 | break; | |
8ae8f162 JK |
79 | case F2FS_XATTR_INDEX_SECURITY: |
80 | break; | |
af48b85b JK |
81 | default: |
82 | return -EINVAL; | |
83 | } | |
84 | if (strcmp(name, "") == 0) | |
85 | return -EINVAL; | |
8ae8f162 | 86 | return f2fs_getxattr(dentry->d_inode, type, name, buffer, size); |
af48b85b JK |
87 | } |
88 | ||
89 | static int f2fs_xattr_generic_set(struct dentry *dentry, const char *name, | |
90 | const void *value, size_t size, int flags, int type) | |
91 | { | |
92 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); | |
93 | ||
94 | switch (type) { | |
95 | case F2FS_XATTR_INDEX_USER: | |
96 | if (!test_opt(sbi, XATTR_USER)) | |
97 | return -EOPNOTSUPP; | |
98 | break; | |
99 | case F2FS_XATTR_INDEX_TRUSTED: | |
100 | if (!capable(CAP_SYS_ADMIN)) | |
101 | return -EPERM; | |
102 | break; | |
8ae8f162 JK |
103 | case F2FS_XATTR_INDEX_SECURITY: |
104 | break; | |
af48b85b JK |
105 | default: |
106 | return -EINVAL; | |
107 | } | |
108 | if (strcmp(name, "") == 0) | |
109 | return -EINVAL; | |
110 | ||
c02745ef JK |
111 | return f2fs_setxattr(dentry->d_inode, type, name, |
112 | value, size, NULL, flags); | |
af48b85b JK |
113 | } |
114 | ||
573ea5fc | 115 | static size_t f2fs_xattr_advise_list(struct dentry *dentry, char *list, |
e1123268 | 116 | size_t list_size, const char *name, size_t len, int type) |
573ea5fc JK |
117 | { |
118 | const char *xname = F2FS_SYSTEM_ADVISE_PREFIX; | |
119 | size_t size; | |
120 | ||
121 | if (type != F2FS_XATTR_INDEX_ADVISE) | |
122 | return 0; | |
123 | ||
124 | size = strlen(xname) + 1; | |
125 | if (list && size <= list_size) | |
126 | memcpy(list, xname, size); | |
127 | return size; | |
128 | } | |
129 | ||
130 | static int f2fs_xattr_advise_get(struct dentry *dentry, const char *name, | |
131 | void *buffer, size_t size, int type) | |
132 | { | |
133 | struct inode *inode = dentry->d_inode; | |
134 | ||
135 | if (strcmp(name, "") != 0) | |
136 | return -EINVAL; | |
137 | ||
138 | *((char *)buffer) = F2FS_I(inode)->i_advise; | |
139 | return sizeof(char); | |
140 | } | |
141 | ||
142 | static int f2fs_xattr_advise_set(struct dentry *dentry, const char *name, | |
143 | const void *value, size_t size, int flags, int type) | |
144 | { | |
145 | struct inode *inode = dentry->d_inode; | |
146 | ||
147 | if (strcmp(name, "") != 0) | |
148 | return -EINVAL; | |
149 | if (!inode_owner_or_capable(inode)) | |
150 | return -EPERM; | |
151 | if (value == NULL) | |
152 | return -EINVAL; | |
153 | ||
154 | F2FS_I(inode)->i_advise |= *(char *)value; | |
155 | return 0; | |
156 | } | |
157 | ||
8ae8f162 | 158 | #ifdef CONFIG_F2FS_FS_SECURITY |
e1123268 JK |
159 | static int __f2fs_setxattr(struct inode *inode, int index, |
160 | const char *name, const void *value, size_t size, | |
c02745ef | 161 | struct page *ipage, int); |
e1123268 | 162 | |
8ae8f162 JK |
163 | static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
164 | void *page) | |
165 | { | |
166 | const struct xattr *xattr; | |
167 | int err = 0; | |
168 | ||
169 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
52ab9560 | 170 | err = __f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY, |
8ae8f162 | 171 | xattr->name, xattr->value, |
c02745ef | 172 | xattr->value_len, (struct page *)page, 0); |
8ae8f162 JK |
173 | if (err < 0) |
174 | break; | |
175 | } | |
176 | return err; | |
177 | } | |
178 | ||
179 | int f2fs_init_security(struct inode *inode, struct inode *dir, | |
180 | const struct qstr *qstr, struct page *ipage) | |
181 | { | |
182 | return security_inode_init_security(inode, dir, qstr, | |
183 | &f2fs_initxattrs, ipage); | |
184 | } | |
185 | #endif | |
186 | ||
af48b85b JK |
187 | const struct xattr_handler f2fs_xattr_user_handler = { |
188 | .prefix = XATTR_USER_PREFIX, | |
189 | .flags = F2FS_XATTR_INDEX_USER, | |
190 | .list = f2fs_xattr_generic_list, | |
191 | .get = f2fs_xattr_generic_get, | |
192 | .set = f2fs_xattr_generic_set, | |
193 | }; | |
194 | ||
195 | const struct xattr_handler f2fs_xattr_trusted_handler = { | |
196 | .prefix = XATTR_TRUSTED_PREFIX, | |
197 | .flags = F2FS_XATTR_INDEX_TRUSTED, | |
198 | .list = f2fs_xattr_generic_list, | |
199 | .get = f2fs_xattr_generic_get, | |
200 | .set = f2fs_xattr_generic_set, | |
201 | }; | |
202 | ||
573ea5fc JK |
203 | const struct xattr_handler f2fs_xattr_advise_handler = { |
204 | .prefix = F2FS_SYSTEM_ADVISE_PREFIX, | |
205 | .flags = F2FS_XATTR_INDEX_ADVISE, | |
206 | .list = f2fs_xattr_advise_list, | |
207 | .get = f2fs_xattr_advise_get, | |
208 | .set = f2fs_xattr_advise_set, | |
209 | }; | |
210 | ||
8ae8f162 JK |
211 | const struct xattr_handler f2fs_xattr_security_handler = { |
212 | .prefix = XATTR_SECURITY_PREFIX, | |
213 | .flags = F2FS_XATTR_INDEX_SECURITY, | |
214 | .list = f2fs_xattr_generic_list, | |
215 | .get = f2fs_xattr_generic_get, | |
216 | .set = f2fs_xattr_generic_set, | |
217 | }; | |
218 | ||
af48b85b JK |
219 | static const struct xattr_handler *f2fs_xattr_handler_map[] = { |
220 | [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler, | |
221 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
a6dda0e6 CH |
222 | [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler, |
223 | [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler, | |
af48b85b JK |
224 | #endif |
225 | [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler, | |
8ae8f162 JK |
226 | #ifdef CONFIG_F2FS_FS_SECURITY |
227 | [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler, | |
228 | #endif | |
af48b85b JK |
229 | [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler, |
230 | }; | |
231 | ||
232 | const struct xattr_handler *f2fs_xattr_handlers[] = { | |
233 | &f2fs_xattr_user_handler, | |
234 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
a6dda0e6 CH |
235 | &posix_acl_access_xattr_handler, |
236 | &posix_acl_default_xattr_handler, | |
af48b85b JK |
237 | #endif |
238 | &f2fs_xattr_trusted_handler, | |
8ae8f162 JK |
239 | #ifdef CONFIG_F2FS_FS_SECURITY |
240 | &f2fs_xattr_security_handler, | |
241 | #endif | |
af48b85b JK |
242 | &f2fs_xattr_advise_handler, |
243 | NULL, | |
244 | }; | |
245 | ||
e1123268 | 246 | static inline const struct xattr_handler *f2fs_xattr_handler(int index) |
af48b85b JK |
247 | { |
248 | const struct xattr_handler *handler = NULL; | |
249 | ||
e1123268 JK |
250 | if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map)) |
251 | handler = f2fs_xattr_handler_map[index]; | |
af48b85b JK |
252 | return handler; |
253 | } | |
254 | ||
e1123268 JK |
255 | static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index, |
256 | size_t len, const char *name) | |
dd9cfe23 JK |
257 | { |
258 | struct f2fs_xattr_entry *entry; | |
259 | ||
260 | list_for_each_xattr(entry, base_addr) { | |
e1123268 | 261 | if (entry->e_name_index != index) |
dd9cfe23 | 262 | continue; |
e1123268 | 263 | if (entry->e_name_len != len) |
dd9cfe23 | 264 | continue; |
e1123268 | 265 | if (!memcmp(entry->e_name, name, len)) |
dd9cfe23 JK |
266 | break; |
267 | } | |
268 | return entry; | |
269 | } | |
270 | ||
65985d93 JK |
271 | static void *read_all_xattrs(struct inode *inode, struct page *ipage) |
272 | { | |
273 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
274 | struct f2fs_xattr_header *header; | |
275 | size_t size = PAGE_SIZE, inline_size = 0; | |
276 | void *txattr_addr; | |
277 | ||
278 | inline_size = inline_xattr_size(inode); | |
279 | ||
808a1d74 | 280 | txattr_addr = kzalloc(inline_size + size, GFP_F2FS_ZERO); |
65985d93 JK |
281 | if (!txattr_addr) |
282 | return NULL; | |
283 | ||
284 | /* read from inline xattr */ | |
285 | if (inline_size) { | |
286 | struct page *page = NULL; | |
287 | void *inline_addr; | |
288 | ||
289 | if (ipage) { | |
290 | inline_addr = inline_xattr_addr(ipage); | |
291 | } else { | |
292 | page = get_node_page(sbi, inode->i_ino); | |
293 | if (IS_ERR(page)) | |
294 | goto fail; | |
295 | inline_addr = inline_xattr_addr(page); | |
296 | } | |
297 | memcpy(txattr_addr, inline_addr, inline_size); | |
298 | f2fs_put_page(page, 1); | |
299 | } | |
300 | ||
301 | /* read from xattr node block */ | |
302 | if (F2FS_I(inode)->i_xattr_nid) { | |
303 | struct page *xpage; | |
304 | void *xattr_addr; | |
305 | ||
306 | /* The inode already has an extended attribute block. */ | |
307 | xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); | |
308 | if (IS_ERR(xpage)) | |
309 | goto fail; | |
310 | ||
311 | xattr_addr = page_address(xpage); | |
312 | memcpy(txattr_addr + inline_size, xattr_addr, PAGE_SIZE); | |
313 | f2fs_put_page(xpage, 1); | |
314 | } | |
315 | ||
316 | header = XATTR_HDR(txattr_addr); | |
317 | ||
318 | /* never been allocated xattrs */ | |
319 | if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { | |
320 | header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); | |
321 | header->h_refcount = cpu_to_le32(1); | |
322 | } | |
323 | return txattr_addr; | |
324 | fail: | |
325 | kzfree(txattr_addr); | |
326 | return NULL; | |
327 | } | |
328 | ||
329 | static inline int write_all_xattrs(struct inode *inode, __u32 hsize, | |
330 | void *txattr_addr, struct page *ipage) | |
331 | { | |
332 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
333 | size_t inline_size = 0; | |
334 | void *xattr_addr; | |
335 | struct page *xpage; | |
336 | nid_t new_nid = 0; | |
337 | int err; | |
338 | ||
339 | inline_size = inline_xattr_size(inode); | |
340 | ||
341 | if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) | |
342 | if (!alloc_nid(sbi, &new_nid)) | |
343 | return -ENOSPC; | |
344 | ||
345 | /* write to inline xattr */ | |
346 | if (inline_size) { | |
347 | struct page *page = NULL; | |
348 | void *inline_addr; | |
349 | ||
350 | if (ipage) { | |
351 | inline_addr = inline_xattr_addr(ipage); | |
54b591df | 352 | f2fs_wait_on_page_writeback(ipage, NODE); |
65985d93 JK |
353 | } else { |
354 | page = get_node_page(sbi, inode->i_ino); | |
355 | if (IS_ERR(page)) { | |
356 | alloc_nid_failed(sbi, new_nid); | |
357 | return PTR_ERR(page); | |
358 | } | |
359 | inline_addr = inline_xattr_addr(page); | |
54b591df | 360 | f2fs_wait_on_page_writeback(page, NODE); |
65985d93 JK |
361 | } |
362 | memcpy(inline_addr, txattr_addr, inline_size); | |
363 | f2fs_put_page(page, 1); | |
364 | ||
365 | /* no need to use xattr node block */ | |
366 | if (hsize <= inline_size) { | |
367 | err = truncate_xattr_node(inode, ipage); | |
368 | alloc_nid_failed(sbi, new_nid); | |
369 | return err; | |
370 | } | |
371 | } | |
372 | ||
373 | /* write to xattr node block */ | |
374 | if (F2FS_I(inode)->i_xattr_nid) { | |
375 | xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); | |
376 | if (IS_ERR(xpage)) { | |
377 | alloc_nid_failed(sbi, new_nid); | |
378 | return PTR_ERR(xpage); | |
379 | } | |
5d56b671 | 380 | f2fs_bug_on(new_nid); |
54b591df | 381 | f2fs_wait_on_page_writeback(xpage, NODE); |
65985d93 JK |
382 | } else { |
383 | struct dnode_of_data dn; | |
384 | set_new_dnode(&dn, inode, NULL, NULL, new_nid); | |
385 | xpage = new_node_page(&dn, XATTR_NODE_OFFSET, ipage); | |
386 | if (IS_ERR(xpage)) { | |
387 | alloc_nid_failed(sbi, new_nid); | |
388 | return PTR_ERR(xpage); | |
389 | } | |
390 | alloc_nid_done(sbi, new_nid); | |
391 | } | |
392 | ||
393 | xattr_addr = page_address(xpage); | |
394 | memcpy(xattr_addr, txattr_addr + inline_size, PAGE_SIZE - | |
395 | sizeof(struct node_footer)); | |
396 | set_page_dirty(xpage); | |
397 | f2fs_put_page(xpage, 1); | |
398 | ||
399 | /* need to checkpoint during fsync */ | |
400 | F2FS_I(inode)->xattr_ver = cur_cp_version(F2FS_CKPT(sbi)); | |
401 | return 0; | |
402 | } | |
403 | ||
e1123268 | 404 | int f2fs_getxattr(struct inode *inode, int index, const char *name, |
af48b85b JK |
405 | void *buffer, size_t buffer_size) |
406 | { | |
af48b85b | 407 | struct f2fs_xattr_entry *entry; |
65985d93 | 408 | void *base_addr; |
dd9cfe23 | 409 | int error = 0; |
e1123268 | 410 | size_t size, len; |
af48b85b JK |
411 | |
412 | if (name == NULL) | |
413 | return -EINVAL; | |
e1123268 JK |
414 | |
415 | len = strlen(name); | |
416 | if (len > F2FS_NAME_LEN) | |
6e452d69 | 417 | return -ERANGE; |
af48b85b | 418 | |
65985d93 JK |
419 | base_addr = read_all_xattrs(inode, NULL); |
420 | if (!base_addr) | |
421 | return -ENOMEM; | |
af48b85b | 422 | |
e1123268 | 423 | entry = __find_xattr(base_addr, index, len, name); |
dd9cfe23 | 424 | if (IS_XATTR_LAST_ENTRY(entry)) { |
af48b85b JK |
425 | error = -ENODATA; |
426 | goto cleanup; | |
427 | } | |
428 | ||
e1123268 | 429 | size = le16_to_cpu(entry->e_value_size); |
af48b85b | 430 | |
e1123268 | 431 | if (buffer && size > buffer_size) { |
af48b85b JK |
432 | error = -ERANGE; |
433 | goto cleanup; | |
434 | } | |
435 | ||
436 | if (buffer) { | |
437 | char *pval = entry->e_name + entry->e_name_len; | |
e1123268 | 438 | memcpy(buffer, pval, size); |
af48b85b | 439 | } |
e1123268 | 440 | error = size; |
af48b85b JK |
441 | |
442 | cleanup: | |
65985d93 | 443 | kzfree(base_addr); |
af48b85b JK |
444 | return error; |
445 | } | |
446 | ||
447 | ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) | |
448 | { | |
449 | struct inode *inode = dentry->d_inode; | |
af48b85b | 450 | struct f2fs_xattr_entry *entry; |
af48b85b JK |
451 | void *base_addr; |
452 | int error = 0; | |
453 | size_t rest = buffer_size; | |
454 | ||
65985d93 JK |
455 | base_addr = read_all_xattrs(inode, NULL); |
456 | if (!base_addr) | |
457 | return -ENOMEM; | |
af48b85b JK |
458 | |
459 | list_for_each_xattr(entry, base_addr) { | |
460 | const struct xattr_handler *handler = | |
461 | f2fs_xattr_handler(entry->e_name_index); | |
462 | size_t size; | |
463 | ||
464 | if (!handler) | |
465 | continue; | |
466 | ||
467 | size = handler->list(dentry, buffer, rest, entry->e_name, | |
468 | entry->e_name_len, handler->flags); | |
469 | if (buffer && size > rest) { | |
470 | error = -ERANGE; | |
471 | goto cleanup; | |
472 | } | |
473 | ||
474 | if (buffer) | |
475 | buffer += size; | |
476 | rest -= size; | |
477 | } | |
478 | error = buffer_size - rest; | |
479 | cleanup: | |
65985d93 | 480 | kzfree(base_addr); |
af48b85b JK |
481 | return error; |
482 | } | |
483 | ||
e1123268 JK |
484 | static int __f2fs_setxattr(struct inode *inode, int index, |
485 | const char *name, const void *value, size_t size, | |
c02745ef | 486 | struct page *ipage, int flags) |
af48b85b | 487 | { |
af48b85b | 488 | struct f2fs_inode_info *fi = F2FS_I(inode); |
af48b85b | 489 | struct f2fs_xattr_entry *here, *last; |
af48b85b | 490 | void *base_addr; |
65985d93 | 491 | int found, newsize; |
e1123268 | 492 | size_t len; |
65985d93 JK |
493 | __u32 new_hsize; |
494 | int error = -ENOMEM; | |
af48b85b JK |
495 | |
496 | if (name == NULL) | |
497 | return -EINVAL; | |
af48b85b JK |
498 | |
499 | if (value == NULL) | |
e1123268 | 500 | size = 0; |
af48b85b | 501 | |
e1123268 | 502 | len = strlen(name); |
7c909772 | 503 | |
e1123268 | 504 | if (len > F2FS_NAME_LEN || size > MAX_VALUE_LEN(inode)) |
af48b85b JK |
505 | return -ERANGE; |
506 | ||
65985d93 JK |
507 | base_addr = read_all_xattrs(inode, ipage); |
508 | if (!base_addr) | |
509 | goto exit; | |
af48b85b JK |
510 | |
511 | /* find entry with wanted name. */ | |
e1123268 | 512 | here = __find_xattr(base_addr, index, len, name); |
af48b85b | 513 | |
dd9cfe23 | 514 | found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; |
af48b85b | 515 | |
916decbf JK |
516 | if ((flags & XATTR_REPLACE) && !found) { |
517 | error = -ENODATA; | |
518 | goto exit; | |
519 | } else if ((flags & XATTR_CREATE) && found) { | |
520 | error = -EEXIST; | |
521 | goto exit; | |
522 | } | |
523 | ||
524 | last = here; | |
af48b85b JK |
525 | while (!IS_XATTR_LAST_ENTRY(last)) |
526 | last = XATTR_NEXT_ENTRY(last); | |
527 | ||
e1123268 | 528 | newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size); |
af48b85b JK |
529 | |
530 | /* 1. Check space */ | |
531 | if (value) { | |
65985d93 JK |
532 | int free; |
533 | /* | |
534 | * If value is NULL, it is remove operation. | |
af48b85b JK |
535 | * In case of update operation, we caculate free. |
536 | */ | |
65985d93 | 537 | free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); |
af48b85b | 538 | if (found) |
cc3de6a3 | 539 | free = free + ENTRY_SIZE(here); |
af48b85b | 540 | |
6bacf52f | 541 | if (unlikely(free < newsize)) { |
af48b85b | 542 | error = -ENOSPC; |
65985d93 | 543 | goto exit; |
af48b85b JK |
544 | } |
545 | } | |
546 | ||
547 | /* 2. Remove old entry */ | |
548 | if (found) { | |
65985d93 JK |
549 | /* |
550 | * If entry is found, remove old entry. | |
af48b85b JK |
551 | * If not found, remove operation is not needed. |
552 | */ | |
553 | struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); | |
554 | int oldsize = ENTRY_SIZE(here); | |
555 | ||
556 | memmove(here, next, (char *)last - (char *)next); | |
557 | last = (struct f2fs_xattr_entry *)((char *)last - oldsize); | |
558 | memset(last, 0, oldsize); | |
559 | } | |
560 | ||
65985d93 JK |
561 | new_hsize = (char *)last - (char *)base_addr; |
562 | ||
af48b85b JK |
563 | /* 3. Write new entry */ |
564 | if (value) { | |
65985d93 JK |
565 | char *pval; |
566 | /* | |
567 | * Before we come here, old entry is removed. | |
568 | * We just write new entry. | |
569 | */ | |
af48b85b | 570 | memset(last, 0, newsize); |
e1123268 JK |
571 | last->e_name_index = index; |
572 | last->e_name_len = len; | |
573 | memcpy(last->e_name, name, len); | |
574 | pval = last->e_name + len; | |
575 | memcpy(pval, value, size); | |
576 | last->e_value_size = cpu_to_le16(size); | |
65985d93 | 577 | new_hsize += newsize; |
af48b85b JK |
578 | } |
579 | ||
65985d93 JK |
580 | error = write_all_xattrs(inode, new_hsize, base_addr, ipage); |
581 | if (error) | |
582 | goto exit; | |
af48b85b JK |
583 | |
584 | if (is_inode_flag_set(fi, FI_ACL_MODE)) { | |
585 | inode->i_mode = fi->i_acl_mode; | |
586 | inode->i_ctime = CURRENT_TIME; | |
587 | clear_inode_flag(fi, FI_ACL_MODE); | |
588 | } | |
e518ff81 | 589 | |
8ae8f162 JK |
590 | if (ipage) |
591 | update_inode(inode, ipage); | |
592 | else | |
593 | update_inode_page(inode); | |
7c909772 | 594 | exit: |
65985d93 | 595 | kzfree(base_addr); |
af48b85b JK |
596 | return error; |
597 | } | |
52ab9560 | 598 | |
e1123268 JK |
599 | int f2fs_setxattr(struct inode *inode, int index, const char *name, |
600 | const void *value, size_t size, | |
c02745ef | 601 | struct page *ipage, int flags) |
52ab9560 RK |
602 | { |
603 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
52ab9560 RK |
604 | int err; |
605 | ||
606 | f2fs_balance_fs(sbi); | |
607 | ||
e479556b | 608 | f2fs_lock_op(sbi); |
d928bfbf JK |
609 | /* protect xattr_ver */ |
610 | down_write(&F2FS_I(inode)->i_sem); | |
c02745ef | 611 | err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags); |
d928bfbf | 612 | up_write(&F2FS_I(inode)->i_sem); |
e479556b | 613 | f2fs_unlock_op(sbi); |
52ab9560 RK |
614 | |
615 | return err; | |
616 | } |