Commit | Line | Data |
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7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
af48b85b JK |
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. | |
af48b85b JK |
17 | */ |
18 | #include <linux/rwsem.h> | |
19 | #include <linux/f2fs_fs.h> | |
8ae8f162 | 20 | #include <linux/security.h> |
a6dda0e6 | 21 | #include <linux/posix_acl_xattr.h> |
af48b85b JK |
22 | #include "f2fs.h" |
23 | #include "xattr.h" | |
955ebcd3 | 24 | #include "segment.h" |
af48b85b | 25 | |
a999150f CY |
26 | static 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; | |
32410577 CY |
30 | return f2fs_kmem_cache_alloc(sbi->inline_xattr_slab, |
31 | GFP_F2FS_ZERO, false, sbi); | |
a999150f CY |
32 | } |
33 | *is_inline = false; | |
34 | return f2fs_kzalloc(sbi, size, GFP_NOFS); | |
35 | } | |
36 | ||
37 | static 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 | |
c8eb7024 | 43 | kfree(xattr_addr); |
a999150f CY |
44 | } |
45 | ||
d9a82a04 | 46 | static int f2fs_xattr_generic_get(const struct xattr_handler *handler, |
b296821a AV |
47 | struct dentry *unused, struct inode *inode, |
48 | const char *name, void *buffer, size_t size) | |
af48b85b | 49 | { |
b296821a | 50 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
af48b85b | 51 | |
d9a82a04 | 52 | switch (handler->flags) { |
af48b85b JK |
53 | case F2FS_XATTR_INDEX_USER: |
54 | if (!test_opt(sbi, XATTR_USER)) | |
55 | return -EOPNOTSUPP; | |
56 | break; | |
57 | case F2FS_XATTR_INDEX_TRUSTED: | |
8ae8f162 JK |
58 | case F2FS_XATTR_INDEX_SECURITY: |
59 | break; | |
af48b85b JK |
60 | default: |
61 | return -EINVAL; | |
62 | } | |
b296821a | 63 | return f2fs_getxattr(inode, handler->flags, name, |
d9a82a04 | 64 | buffer, size, NULL); |
af48b85b JK |
65 | } |
66 | ||
d9a82a04 | 67 | static int f2fs_xattr_generic_set(const struct xattr_handler *handler, |
e65ce2a5 | 68 | struct user_namespace *mnt_userns, |
59301226 AV |
69 | struct dentry *unused, struct inode *inode, |
70 | const char *name, const void *value, | |
d9a82a04 | 71 | size_t size, int flags) |
af48b85b | 72 | { |
59301226 | 73 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
af48b85b | 74 | |
d9a82a04 | 75 | switch (handler->flags) { |
af48b85b JK |
76 | case F2FS_XATTR_INDEX_USER: |
77 | if (!test_opt(sbi, XATTR_USER)) | |
78 | return -EOPNOTSUPP; | |
79 | break; | |
80 | case F2FS_XATTR_INDEX_TRUSTED: | |
8ae8f162 JK |
81 | case F2FS_XATTR_INDEX_SECURITY: |
82 | break; | |
af48b85b JK |
83 | default: |
84 | return -EINVAL; | |
85 | } | |
59301226 | 86 | return f2fs_setxattr(inode, handler->flags, name, |
c02745ef | 87 | value, size, NULL, flags); |
af48b85b JK |
88 | } |
89 | ||
764a5c6b | 90 | static bool f2fs_xattr_user_list(struct dentry *dentry) |
573ea5fc | 91 | { |
764a5c6b AG |
92 | struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); |
93 | ||
94 | return test_opt(sbi, XATTR_USER); | |
95 | } | |
573ea5fc | 96 | |
764a5c6b AG |
97 | static bool f2fs_xattr_trusted_list(struct dentry *dentry) |
98 | { | |
99 | return capable(CAP_SYS_ADMIN); | |
573ea5fc JK |
100 | } |
101 | ||
d9a82a04 | 102 | static int f2fs_xattr_advise_get(const struct xattr_handler *handler, |
b296821a AV |
103 | struct dentry *unused, struct inode *inode, |
104 | const char *name, void *buffer, size_t size) | |
573ea5fc | 105 | { |
84e97c27 CY |
106 | if (buffer) |
107 | *((char *)buffer) = F2FS_I(inode)->i_advise; | |
573ea5fc JK |
108 | return sizeof(char); |
109 | } | |
110 | ||
d9a82a04 | 111 | static int f2fs_xattr_advise_set(const struct xattr_handler *handler, |
e65ce2a5 | 112 | struct user_namespace *mnt_userns, |
59301226 AV |
113 | struct dentry *unused, struct inode *inode, |
114 | const char *name, const void *value, | |
d9a82a04 | 115 | size_t size, int flags) |
573ea5fc | 116 | { |
797c1cb5 CY |
117 | unsigned char old_advise = F2FS_I(inode)->i_advise; |
118 | unsigned char new_advise; | |
119 | ||
21cb47be | 120 | if (!inode_owner_or_capable(&init_user_ns, inode)) |
573ea5fc JK |
121 | return -EPERM; |
122 | if (value == NULL) | |
123 | return -EINVAL; | |
124 | ||
797c1cb5 CY |
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; | |
7c45729a | 133 | f2fs_mark_inode_dirty_sync(inode, true); |
573ea5fc JK |
134 | return 0; |
135 | } | |
136 | ||
8ae8f162 JK |
137 | #ifdef CONFIG_F2FS_FS_SECURITY |
138 | static 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++) { | |
d631abda | 145 | err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY, |
8ae8f162 | 146 | xattr->name, xattr->value, |
c02745ef | 147 | xattr->value_len, (struct page *)page, 0); |
8ae8f162 JK |
148 | if (err < 0) |
149 | break; | |
150 | } | |
151 | return err; | |
152 | } | |
153 | ||
154 | int 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 | ||
af48b85b JK |
162 | const struct xattr_handler f2fs_xattr_user_handler = { |
163 | .prefix = XATTR_USER_PREFIX, | |
164 | .flags = F2FS_XATTR_INDEX_USER, | |
764a5c6b | 165 | .list = f2fs_xattr_user_list, |
af48b85b JK |
166 | .get = f2fs_xattr_generic_get, |
167 | .set = f2fs_xattr_generic_set, | |
168 | }; | |
169 | ||
170 | const struct xattr_handler f2fs_xattr_trusted_handler = { | |
171 | .prefix = XATTR_TRUSTED_PREFIX, | |
172 | .flags = F2FS_XATTR_INDEX_TRUSTED, | |
764a5c6b | 173 | .list = f2fs_xattr_trusted_list, |
af48b85b JK |
174 | .get = f2fs_xattr_generic_get, |
175 | .set = f2fs_xattr_generic_set, | |
176 | }; | |
177 | ||
573ea5fc | 178 | const struct xattr_handler f2fs_xattr_advise_handler = { |
98e9cb57 | 179 | .name = F2FS_SYSTEM_ADVISE_NAME, |
573ea5fc | 180 | .flags = F2FS_XATTR_INDEX_ADVISE, |
a87aff1d JQ |
181 | .get = f2fs_xattr_advise_get, |
182 | .set = f2fs_xattr_advise_set, | |
573ea5fc JK |
183 | }; |
184 | ||
8ae8f162 JK |
185 | const struct xattr_handler f2fs_xattr_security_handler = { |
186 | .prefix = XATTR_SECURITY_PREFIX, | |
187 | .flags = F2FS_XATTR_INDEX_SECURITY, | |
8ae8f162 JK |
188 | .get = f2fs_xattr_generic_get, |
189 | .set = f2fs_xattr_generic_set, | |
190 | }; | |
191 | ||
af48b85b JK |
192 | static const struct xattr_handler *f2fs_xattr_handler_map[] = { |
193 | [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler, | |
194 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
a6dda0e6 CH |
195 | [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler, |
196 | [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler, | |
af48b85b JK |
197 | #endif |
198 | [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler, | |
8ae8f162 JK |
199 | #ifdef CONFIG_F2FS_FS_SECURITY |
200 | [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler, | |
201 | #endif | |
af48b85b JK |
202 | [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler, |
203 | }; | |
204 | ||
205 | const struct xattr_handler *f2fs_xattr_handlers[] = { | |
206 | &f2fs_xattr_user_handler, | |
207 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
a6dda0e6 CH |
208 | &posix_acl_access_xattr_handler, |
209 | &posix_acl_default_xattr_handler, | |
af48b85b JK |
210 | #endif |
211 | &f2fs_xattr_trusted_handler, | |
8ae8f162 JK |
212 | #ifdef CONFIG_F2FS_FS_SECURITY |
213 | &f2fs_xattr_security_handler, | |
214 | #endif | |
af48b85b JK |
215 | &f2fs_xattr_advise_handler, |
216 | NULL, | |
217 | }; | |
218 | ||
e1123268 | 219 | static inline const struct xattr_handler *f2fs_xattr_handler(int index) |
af48b85b JK |
220 | { |
221 | const struct xattr_handler *handler = NULL; | |
222 | ||
e1123268 JK |
223 | if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map)) |
224 | handler = f2fs_xattr_handler_map[index]; | |
af48b85b JK |
225 | return handler; |
226 | } | |
227 | ||
2777e654 RH |
228 | static struct f2fs_xattr_entry *__find_xattr(void *base_addr, |
229 | void *last_base_addr, int index, | |
230 | size_t len, const char *name) | |
dd9cfe23 JK |
231 | { |
232 | struct f2fs_xattr_entry *entry; | |
233 | ||
234 | list_for_each_xattr(entry, base_addr) { | |
2777e654 RH |
235 | if ((void *)(entry) + sizeof(__u32) > last_base_addr || |
236 | (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) | |
237 | return NULL; | |
238 | ||
e1123268 | 239 | if (entry->e_name_index != index) |
dd9cfe23 | 240 | continue; |
e1123268 | 241 | if (entry->e_name_len != len) |
dd9cfe23 | 242 | continue; |
e1123268 | 243 | if (!memcmp(entry->e_name, name, len)) |
dd9cfe23 JK |
244 | break; |
245 | } | |
246 | return entry; | |
247 | } | |
248 | ||
6afc662e CY |
249 | static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode, |
250 | void *base_addr, void **last_addr, int index, | |
251 | size_t len, const char *name) | |
ba38c27e CY |
252 | { |
253 | struct f2fs_xattr_entry *entry; | |
6afc662e | 254 | unsigned int inline_size = inline_xattr_size(inode); |
2c28aba8 | 255 | void *max_addr = base_addr + inline_size; |
ba38c27e CY |
256 | |
257 | list_for_each_xattr(entry, base_addr) { | |
2c28aba8 CY |
258 | if ((void *)entry + sizeof(__u32) > max_addr || |
259 | (void *)XATTR_NEXT_ENTRY(entry) > max_addr) { | |
ba38c27e CY |
260 | *last_addr = entry; |
261 | return NULL; | |
262 | } | |
263 | if (entry->e_name_index != index) | |
264 | continue; | |
265 | if (entry->e_name_len != len) | |
266 | continue; | |
267 | if (!memcmp(entry->e_name, name, len)) | |
268 | break; | |
269 | } | |
2c28aba8 CY |
270 | |
271 | /* inline xattr header or entry across max inline xattr size */ | |
272 | if (IS_XATTR_LAST_ENTRY(entry) && | |
273 | (void *)entry + sizeof(__u32) > max_addr) { | |
274 | *last_addr = entry; | |
275 | return NULL; | |
276 | } | |
ba38c27e CY |
277 | return entry; |
278 | } | |
279 | ||
a5f433f7 CY |
280 | static int read_inline_xattr(struct inode *inode, struct page *ipage, |
281 | void *txattr_addr) | |
282 | { | |
283 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
284 | unsigned int inline_size = inline_xattr_size(inode); | |
285 | struct page *page = NULL; | |
286 | void *inline_addr; | |
287 | ||
288 | if (ipage) { | |
6afc662e | 289 | inline_addr = inline_xattr_addr(inode, ipage); |
a5f433f7 | 290 | } else { |
4d57b86d | 291 | page = f2fs_get_node_page(sbi, inode->i_ino); |
a5f433f7 CY |
292 | if (IS_ERR(page)) |
293 | return PTR_ERR(page); | |
294 | ||
6afc662e | 295 | inline_addr = inline_xattr_addr(inode, page); |
a5f433f7 CY |
296 | } |
297 | memcpy(txattr_addr, inline_addr, inline_size); | |
298 | f2fs_put_page(page, 1); | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
63840695 CY |
303 | static int read_xattr_block(struct inode *inode, void *txattr_addr) |
304 | { | |
305 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
306 | nid_t xnid = F2FS_I(inode)->i_xattr_nid; | |
307 | unsigned int inline_size = inline_xattr_size(inode); | |
308 | struct page *xpage; | |
309 | void *xattr_addr; | |
310 | ||
311 | /* The inode already has an extended attribute block. */ | |
4d57b86d | 312 | xpage = f2fs_get_node_page(sbi, xnid); |
63840695 CY |
313 | if (IS_ERR(xpage)) |
314 | return PTR_ERR(xpage); | |
315 | ||
316 | xattr_addr = page_address(xpage); | |
317 | memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE); | |
318 | f2fs_put_page(xpage, 1); | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
ba38c27e CY |
323 | static int lookup_all_xattrs(struct inode *inode, struct page *ipage, |
324 | unsigned int index, unsigned int len, | |
325 | const char *name, struct f2fs_xattr_entry **xe, | |
a999150f CY |
326 | void **base_addr, int *base_size, |
327 | bool *is_inline) | |
ba38c27e | 328 | { |
2777e654 RH |
329 | void *cur_addr, *txattr_addr, *last_txattr_addr; |
330 | void *last_addr = NULL; | |
ba38c27e | 331 | nid_t xnid = F2FS_I(inode)->i_xattr_nid; |
89e9eabd | 332 | unsigned int inline_size = inline_xattr_size(inode); |
2e0cd472 | 333 | int err; |
ba38c27e | 334 | |
2777e654 | 335 | if (!xnid && !inline_size) |
ba38c27e CY |
336 | return -ENODATA; |
337 | ||
ba3b583c | 338 | *base_size = XATTR_SIZE(inode) + XATTR_PADDING_SIZE; |
a999150f | 339 | txattr_addr = xattr_alloc(F2FS_I_SB(inode), *base_size, is_inline); |
ba38c27e CY |
340 | if (!txattr_addr) |
341 | return -ENOMEM; | |
342 | ||
ba3b583c | 343 | last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(inode); |
2777e654 | 344 | |
ba38c27e CY |
345 | /* read from inline xattr */ |
346 | if (inline_size) { | |
a5f433f7 CY |
347 | err = read_inline_xattr(inode, ipage, txattr_addr); |
348 | if (err) | |
349 | goto out; | |
ba38c27e | 350 | |
6afc662e | 351 | *xe = __find_inline_xattr(inode, txattr_addr, &last_addr, |
ba38c27e | 352 | index, len, name); |
64beba05 JK |
353 | if (*xe) { |
354 | *base_size = inline_size; | |
ba38c27e | 355 | goto check; |
64beba05 | 356 | } |
ba38c27e CY |
357 | } |
358 | ||
359 | /* read from xattr node block */ | |
360 | if (xnid) { | |
63840695 CY |
361 | err = read_xattr_block(inode, txattr_addr); |
362 | if (err) | |
ba38c27e | 363 | goto out; |
ba38c27e CY |
364 | } |
365 | ||
366 | if (last_addr) | |
367 | cur_addr = XATTR_HDR(last_addr) - 1; | |
368 | else | |
369 | cur_addr = txattr_addr; | |
370 | ||
2777e654 RH |
371 | *xe = __find_xattr(cur_addr, last_txattr_addr, index, len, name); |
372 | if (!*xe) { | |
c83414ae CY |
373 | f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr", |
374 | inode->i_ino); | |
375 | set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); | |
10f966bb | 376 | err = -EFSCORRUPTED; |
2777e654 RH |
377 | goto out; |
378 | } | |
ba38c27e CY |
379 | check: |
380 | if (IS_XATTR_LAST_ENTRY(*xe)) { | |
381 | err = -ENODATA; | |
382 | goto out; | |
383 | } | |
384 | ||
385 | *base_addr = txattr_addr; | |
386 | return 0; | |
387 | out: | |
a999150f | 388 | xattr_free(F2FS_I_SB(inode), txattr_addr, *is_inline); |
ba38c27e CY |
389 | return err; |
390 | } | |
391 | ||
86696966 CY |
392 | static int read_all_xattrs(struct inode *inode, struct page *ipage, |
393 | void **base_addr) | |
65985d93 | 394 | { |
65985d93 | 395 | struct f2fs_xattr_header *header; |
89e9eabd CY |
396 | nid_t xnid = F2FS_I(inode)->i_xattr_nid; |
397 | unsigned int size = VALID_XATTR_BLOCK_SIZE; | |
398 | unsigned int inline_size = inline_xattr_size(inode); | |
65985d93 | 399 | void *txattr_addr; |
86696966 | 400 | int err; |
65985d93 | 401 | |
acbf054d CY |
402 | txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), |
403 | inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS); | |
65985d93 | 404 | if (!txattr_addr) |
86696966 | 405 | return -ENOMEM; |
65985d93 JK |
406 | |
407 | /* read from inline xattr */ | |
408 | if (inline_size) { | |
a5f433f7 CY |
409 | err = read_inline_xattr(inode, ipage, txattr_addr); |
410 | if (err) | |
411 | goto fail; | |
65985d93 JK |
412 | } |
413 | ||
414 | /* read from xattr node block */ | |
89e9eabd | 415 | if (xnid) { |
63840695 CY |
416 | err = read_xattr_block(inode, txattr_addr); |
417 | if (err) | |
65985d93 | 418 | goto fail; |
65985d93 JK |
419 | } |
420 | ||
421 | header = XATTR_HDR(txattr_addr); | |
422 | ||
423 | /* never been allocated xattrs */ | |
424 | if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { | |
425 | header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); | |
426 | header->h_refcount = cpu_to_le32(1); | |
427 | } | |
86696966 CY |
428 | *base_addr = txattr_addr; |
429 | return 0; | |
65985d93 | 430 | fail: |
c8eb7024 | 431 | kfree(txattr_addr); |
86696966 | 432 | return err; |
65985d93 JK |
433 | } |
434 | ||
435 | static inline int write_all_xattrs(struct inode *inode, __u32 hsize, | |
436 | void *txattr_addr, struct page *ipage) | |
437 | { | |
4081363f | 438 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
89e9eabd | 439 | size_t inline_size = inline_xattr_size(inode); |
bf9c1427 | 440 | struct page *in_page = NULL; |
65985d93 | 441 | void *xattr_addr; |
bf9c1427 | 442 | void *inline_addr = NULL; |
65985d93 JK |
443 | struct page *xpage; |
444 | nid_t new_nid = 0; | |
bf9c1427 | 445 | int err = 0; |
65985d93 | 446 | |
65985d93 | 447 | if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) |
4d57b86d | 448 | if (!f2fs_alloc_nid(sbi, &new_nid)) |
65985d93 JK |
449 | return -ENOSPC; |
450 | ||
451 | /* write to inline xattr */ | |
452 | if (inline_size) { | |
65985d93 | 453 | if (ipage) { |
6afc662e | 454 | inline_addr = inline_xattr_addr(inode, ipage); |
65985d93 | 455 | } else { |
4d57b86d | 456 | in_page = f2fs_get_node_page(sbi, inode->i_ino); |
bf9c1427 | 457 | if (IS_ERR(in_page)) { |
4d57b86d | 458 | f2fs_alloc_nid_failed(sbi, new_nid); |
bf9c1427 | 459 | return PTR_ERR(in_page); |
65985d93 | 460 | } |
bf9c1427 | 461 | inline_addr = inline_xattr_addr(inode, in_page); |
65985d93 | 462 | } |
65985d93 | 463 | |
bf9c1427 | 464 | f2fs_wait_on_page_writeback(ipage ? ipage : in_page, |
bae0ee7a | 465 | NODE, true, true); |
65985d93 JK |
466 | /* no need to use xattr node block */ |
467 | if (hsize <= inline_size) { | |
4d57b86d CY |
468 | err = f2fs_truncate_xattr_node(inode); |
469 | f2fs_alloc_nid_failed(sbi, new_nid); | |
bf9c1427 JK |
470 | if (err) { |
471 | f2fs_put_page(in_page, 1); | |
472 | return err; | |
473 | } | |
474 | memcpy(inline_addr, txattr_addr, inline_size); | |
475 | set_page_dirty(ipage ? ipage : in_page); | |
476 | goto in_page_out; | |
65985d93 JK |
477 | } |
478 | } | |
479 | ||
480 | /* write to xattr node block */ | |
481 | if (F2FS_I(inode)->i_xattr_nid) { | |
4d57b86d | 482 | xpage = f2fs_get_node_page(sbi, F2FS_I(inode)->i_xattr_nid); |
65985d93 | 483 | if (IS_ERR(xpage)) { |
d620439f | 484 | err = PTR_ERR(xpage); |
4d57b86d | 485 | f2fs_alloc_nid_failed(sbi, new_nid); |
bf9c1427 | 486 | goto in_page_out; |
65985d93 | 487 | } |
9850cf4a | 488 | f2fs_bug_on(sbi, new_nid); |
bae0ee7a | 489 | f2fs_wait_on_page_writeback(xpage, NODE, true, true); |
65985d93 JK |
490 | } else { |
491 | struct dnode_of_data dn; | |
5f029c04 | 492 | |
65985d93 | 493 | set_new_dnode(&dn, inode, NULL, NULL, new_nid); |
4d57b86d | 494 | xpage = f2fs_new_node_page(&dn, XATTR_NODE_OFFSET); |
65985d93 | 495 | if (IS_ERR(xpage)) { |
d620439f | 496 | err = PTR_ERR(xpage); |
4d57b86d | 497 | f2fs_alloc_nid_failed(sbi, new_nid); |
bf9c1427 | 498 | goto in_page_out; |
65985d93 | 499 | } |
4d57b86d | 500 | f2fs_alloc_nid_done(sbi, new_nid); |
65985d93 | 501 | } |
65985d93 | 502 | xattr_addr = page_address(xpage); |
bf9c1427 JK |
503 | |
504 | if (inline_size) | |
505 | memcpy(inline_addr, txattr_addr, inline_size); | |
22588f87 | 506 | memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE); |
bf9c1427 JK |
507 | |
508 | if (inline_size) | |
509 | set_page_dirty(ipage ? ipage : in_page); | |
65985d93 | 510 | set_page_dirty(xpage); |
65985d93 | 511 | |
bf9c1427 JK |
512 | f2fs_put_page(xpage, 1); |
513 | in_page_out: | |
514 | f2fs_put_page(in_page, 1); | |
515 | return err; | |
65985d93 JK |
516 | } |
517 | ||
e1123268 | 518 | int f2fs_getxattr(struct inode *inode, int index, const char *name, |
bce8d112 | 519 | void *buffer, size_t buffer_size, struct page *ipage) |
af48b85b | 520 | { |
ba38c27e | 521 | struct f2fs_xattr_entry *entry = NULL; |
2e0cd472 | 522 | int error; |
ba38c27e | 523 | unsigned int size, len; |
ba38c27e | 524 | void *base_addr = NULL; |
64beba05 | 525 | int base_size; |
a999150f | 526 | bool is_inline; |
af48b85b JK |
527 | |
528 | if (name == NULL) | |
529 | return -EINVAL; | |
e1123268 JK |
530 | |
531 | len = strlen(name); | |
532 | if (len > F2FS_NAME_LEN) | |
6e452d69 | 533 | return -ERANGE; |
af48b85b | 534 | |
27161f13 | 535 | down_read(&F2FS_I(inode)->i_xattr_sem); |
ba38c27e | 536 | error = lookup_all_xattrs(inode, ipage, index, len, name, |
a999150f | 537 | &entry, &base_addr, &base_size, &is_inline); |
27161f13 | 538 | up_read(&F2FS_I(inode)->i_xattr_sem); |
86696966 CY |
539 | if (error) |
540 | return error; | |
af48b85b | 541 | |
e1123268 | 542 | size = le16_to_cpu(entry->e_value_size); |
af48b85b | 543 | |
e1123268 | 544 | if (buffer && size > buffer_size) { |
af48b85b | 545 | error = -ERANGE; |
ba38c27e | 546 | goto out; |
af48b85b JK |
547 | } |
548 | ||
549 | if (buffer) { | |
550 | char *pval = entry->e_name + entry->e_name_len; | |
64beba05 JK |
551 | |
552 | if (base_size - (pval - (char *)base_addr) < size) { | |
553 | error = -ERANGE; | |
554 | goto out; | |
555 | } | |
e1123268 | 556 | memcpy(buffer, pval, size); |
af48b85b | 557 | } |
e1123268 | 558 | error = size; |
ba38c27e | 559 | out: |
a999150f | 560 | xattr_free(F2FS_I_SB(inode), base_addr, is_inline); |
af48b85b JK |
561 | return error; |
562 | } | |
563 | ||
564 | ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) | |
565 | { | |
2b0143b5 | 566 | struct inode *inode = d_inode(dentry); |
af48b85b | 567 | struct f2fs_xattr_entry *entry; |
688078e7 | 568 | void *base_addr, *last_base_addr; |
2e0cd472 | 569 | int error; |
af48b85b JK |
570 | size_t rest = buffer_size; |
571 | ||
27161f13 | 572 | down_read(&F2FS_I(inode)->i_xattr_sem); |
86696966 | 573 | error = read_all_xattrs(inode, NULL, &base_addr); |
27161f13 | 574 | up_read(&F2FS_I(inode)->i_xattr_sem); |
86696966 CY |
575 | if (error) |
576 | return error; | |
af48b85b | 577 | |
ba3b583c | 578 | last_base_addr = (void *)base_addr + XATTR_SIZE(inode); |
688078e7 | 579 | |
af48b85b JK |
580 | list_for_each_xattr(entry, base_addr) { |
581 | const struct xattr_handler *handler = | |
582 | f2fs_xattr_handler(entry->e_name_index); | |
764a5c6b AG |
583 | const char *prefix; |
584 | size_t prefix_len; | |
af48b85b JK |
585 | size_t size; |
586 | ||
688078e7 RH |
587 | if ((void *)(entry) + sizeof(__u32) > last_base_addr || |
588 | (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) { | |
589 | f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr", | |
590 | inode->i_ino); | |
591 | set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); | |
592 | error = -EFSCORRUPTED; | |
593 | goto cleanup; | |
594 | } | |
595 | ||
764a5c6b | 596 | if (!handler || (handler->list && !handler->list(dentry))) |
af48b85b JK |
597 | continue; |
598 | ||
eecfa427 | 599 | prefix = xattr_prefix(handler); |
764a5c6b AG |
600 | prefix_len = strlen(prefix); |
601 | size = prefix_len + entry->e_name_len + 1; | |
602 | if (buffer) { | |
603 | if (size > rest) { | |
604 | error = -ERANGE; | |
605 | goto cleanup; | |
606 | } | |
607 | memcpy(buffer, prefix, prefix_len); | |
608 | buffer += prefix_len; | |
609 | memcpy(buffer, entry->e_name, entry->e_name_len); | |
610 | buffer += entry->e_name_len; | |
611 | *buffer++ = 0; | |
af48b85b | 612 | } |
af48b85b JK |
613 | rest -= size; |
614 | } | |
615 | error = buffer_size - rest; | |
616 | cleanup: | |
c8eb7024 | 617 | kfree(base_addr); |
af48b85b JK |
618 | return error; |
619 | } | |
620 | ||
5f35a2cd KM |
621 | static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry, |
622 | const void *value, size_t size) | |
623 | { | |
624 | void *pval = entry->e_name + entry->e_name_len; | |
b71deadb JK |
625 | |
626 | return (le16_to_cpu(entry->e_value_size) == size) && | |
627 | !memcmp(pval, value, size); | |
5f35a2cd KM |
628 | } |
629 | ||
e1123268 JK |
630 | static int __f2fs_setxattr(struct inode *inode, int index, |
631 | const char *name, const void *value, size_t size, | |
c02745ef | 632 | struct page *ipage, int flags) |
af48b85b | 633 | { |
af48b85b | 634 | struct f2fs_xattr_entry *here, *last; |
2777e654 | 635 | void *base_addr, *last_base_addr; |
65985d93 | 636 | int found, newsize; |
e1123268 | 637 | size_t len; |
65985d93 | 638 | __u32 new_hsize; |
2e0cd472 | 639 | int error; |
af48b85b JK |
640 | |
641 | if (name == NULL) | |
642 | return -EINVAL; | |
af48b85b JK |
643 | |
644 | if (value == NULL) | |
e1123268 | 645 | size = 0; |
af48b85b | 646 | |
e1123268 | 647 | len = strlen(name); |
7c909772 | 648 | |
037fe70c | 649 | if (len > F2FS_NAME_LEN) |
af48b85b JK |
650 | return -ERANGE; |
651 | ||
037fe70c CY |
652 | if (size > MAX_VALUE_LEN(inode)) |
653 | return -E2BIG; | |
654 | ||
86696966 CY |
655 | error = read_all_xattrs(inode, ipage, &base_addr); |
656 | if (error) | |
657 | return error; | |
af48b85b | 658 | |
ba3b583c | 659 | last_base_addr = (void *)base_addr + XATTR_SIZE(inode); |
2777e654 | 660 | |
af48b85b | 661 | /* find entry with wanted name. */ |
2777e654 RH |
662 | here = __find_xattr(base_addr, last_base_addr, index, len, name); |
663 | if (!here) { | |
c83414ae CY |
664 | f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr", |
665 | inode->i_ino); | |
666 | set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); | |
10f966bb | 667 | error = -EFSCORRUPTED; |
2777e654 RH |
668 | goto exit; |
669 | } | |
af48b85b | 670 | |
dd9cfe23 | 671 | found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; |
af48b85b | 672 | |
5f35a2cd KM |
673 | if (found) { |
674 | if ((flags & XATTR_CREATE)) { | |
675 | error = -EEXIST; | |
676 | goto exit; | |
677 | } | |
678 | ||
b2c4692b | 679 | if (value && f2fs_xattr_value_same(here, value, size)) |
17232e83 | 680 | goto same; |
5f35a2cd | 681 | } else if ((flags & XATTR_REPLACE)) { |
916decbf JK |
682 | error = -ENODATA; |
683 | goto exit; | |
916decbf JK |
684 | } |
685 | ||
686 | last = here; | |
af48b85b JK |
687 | while (!IS_XATTR_LAST_ENTRY(last)) |
688 | last = XATTR_NEXT_ENTRY(last); | |
689 | ||
e1123268 | 690 | newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size); |
af48b85b JK |
691 | |
692 | /* 1. Check space */ | |
693 | if (value) { | |
65985d93 JK |
694 | int free; |
695 | /* | |
696 | * If value is NULL, it is remove operation. | |
e1c42045 | 697 | * In case of update operation, we calculate free. |
af48b85b | 698 | */ |
65985d93 | 699 | free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); |
af48b85b | 700 | if (found) |
cc3de6a3 | 701 | free = free + ENTRY_SIZE(here); |
af48b85b | 702 | |
6bacf52f | 703 | if (unlikely(free < newsize)) { |
58457f1c | 704 | error = -E2BIG; |
65985d93 | 705 | goto exit; |
af48b85b JK |
706 | } |
707 | } | |
708 | ||
709 | /* 2. Remove old entry */ | |
710 | if (found) { | |
65985d93 JK |
711 | /* |
712 | * If entry is found, remove old entry. | |
af48b85b JK |
713 | * If not found, remove operation is not needed. |
714 | */ | |
715 | struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); | |
716 | int oldsize = ENTRY_SIZE(here); | |
717 | ||
718 | memmove(here, next, (char *)last - (char *)next); | |
719 | last = (struct f2fs_xattr_entry *)((char *)last - oldsize); | |
720 | memset(last, 0, oldsize); | |
721 | } | |
722 | ||
65985d93 JK |
723 | new_hsize = (char *)last - (char *)base_addr; |
724 | ||
af48b85b JK |
725 | /* 3. Write new entry */ |
726 | if (value) { | |
65985d93 JK |
727 | char *pval; |
728 | /* | |
729 | * Before we come here, old entry is removed. | |
730 | * We just write new entry. | |
731 | */ | |
e1123268 JK |
732 | last->e_name_index = index; |
733 | last->e_name_len = len; | |
734 | memcpy(last->e_name, name, len); | |
735 | pval = last->e_name + len; | |
736 | memcpy(pval, value, size); | |
737 | last->e_value_size = cpu_to_le16(size); | |
65985d93 | 738 | new_hsize += newsize; |
af48b85b JK |
739 | } |
740 | ||
65985d93 JK |
741 | error = write_all_xattrs(inode, new_hsize, base_addr, ipage); |
742 | if (error) | |
743 | goto exit; | |
af48b85b | 744 | |
f424f664 JK |
745 | if (index == F2FS_XATTR_INDEX_ENCRYPTION && |
746 | !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT)) | |
747 | f2fs_set_encrypted_inode(inode); | |
7c45729a | 748 | f2fs_mark_inode_dirty_sync(inode, true); |
bbf156f7 JK |
749 | if (!error && S_ISDIR(inode->i_mode)) |
750 | set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP); | |
17232e83 CY |
751 | |
752 | same: | |
753 | if (is_inode_flag_set(inode, FI_ACL_MODE)) { | |
754 | inode->i_mode = F2FS_I(inode)->i_acl_mode; | |
755 | inode->i_ctime = current_time(inode); | |
756 | clear_inode_flag(inode, FI_ACL_MODE); | |
757 | } | |
758 | ||
7c909772 | 759 | exit: |
c8eb7024 | 760 | kfree(base_addr); |
af48b85b JK |
761 | return error; |
762 | } | |
52ab9560 | 763 | |
e1123268 JK |
764 | int f2fs_setxattr(struct inode *inode, int index, const char *name, |
765 | const void *value, size_t size, | |
c02745ef | 766 | struct page *ipage, int flags) |
52ab9560 | 767 | { |
4081363f | 768 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
52ab9560 RK |
769 | int err; |
770 | ||
a25c2cdc CY |
771 | if (unlikely(f2fs_cp_error(sbi))) |
772 | return -EIO; | |
00e09c0b CY |
773 | if (!f2fs_is_checkpoint_ready(sbi)) |
774 | return -ENOSPC; | |
955ebcd3 | 775 | |
d8d1389e JK |
776 | err = dquot_initialize(inode); |
777 | if (err) | |
778 | return err; | |
779 | ||
4d57b86d | 780 | /* this case is only from f2fs_init_inode_metadata */ |
d631abda JK |
781 | if (ipage) |
782 | return __f2fs_setxattr(inode, index, name, value, | |
783 | size, ipage, flags); | |
2c4db1a6 | 784 | f2fs_balance_fs(sbi, true); |
52ab9560 | 785 | |
e479556b | 786 | f2fs_lock_op(sbi); |
27161f13 | 787 | down_write(&F2FS_I(inode)->i_xattr_sem); |
c02745ef | 788 | err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags); |
27161f13 | 789 | up_write(&F2FS_I(inode)->i_xattr_sem); |
e479556b | 790 | f2fs_unlock_op(sbi); |
52ab9560 | 791 | |
d0239e1b | 792 | f2fs_update_time(sbi, REQ_TIME); |
52ab9560 RK |
793 | return err; |
794 | } | |
a999150f CY |
795 | |
796 | int f2fs_init_xattr_caches(struct f2fs_sb_info *sbi) | |
797 | { | |
798 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
799 | char slab_name[32]; | |
800 | ||
801 | sprintf(slab_name, "f2fs_xattr_entry-%u:%u", MAJOR(dev), MINOR(dev)); | |
802 | ||
803 | sbi->inline_xattr_slab_size = F2FS_OPTION(sbi).inline_xattr_size * | |
804 | sizeof(__le32) + XATTR_PADDING_SIZE; | |
805 | ||
806 | sbi->inline_xattr_slab = f2fs_kmem_cache_create(slab_name, | |
807 | sbi->inline_xattr_slab_size); | |
808 | if (!sbi->inline_xattr_slab) | |
809 | return -ENOMEM; | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
814 | void f2fs_destroy_xattr_caches(struct f2fs_sb_info *sbi) | |
815 | { | |
816 | kmem_cache_destroy(sbi->inline_xattr_slab); | |
817 | } |