Root/
1 | /** |
2 | * eCryptfs: Linux filesystem encryption layer |
3 | * |
4 | * Copyright (C) 1997-2004 Erez Zadok |
5 | * Copyright (C) 2001-2004 Stony Brook University |
6 | * Copyright (C) 2004-2007 International Business Machines Corp. |
7 | * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> |
8 | * Michael C. Thompsion <mcthomps@us.ibm.com> |
9 | * |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public License as |
12 | * published by the Free Software Foundation; either version 2 of the |
13 | * License, or (at your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, but |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | * General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program; if not, write to the Free Software |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
23 | * 02111-1307, USA. |
24 | */ |
25 | |
26 | #include <linux/file.h> |
27 | #include <linux/vmalloc.h> |
28 | #include <linux/pagemap.h> |
29 | #include <linux/dcache.h> |
30 | #include <linux/namei.h> |
31 | #include <linux/mount.h> |
32 | #include <linux/crypto.h> |
33 | #include <linux/fs_stack.h> |
34 | #include <asm/unaligned.h> |
35 | #include "ecryptfs_kernel.h" |
36 | |
37 | static struct dentry *lock_parent(struct dentry *dentry) |
38 | { |
39 | struct dentry *dir; |
40 | |
41 | dir = dget_parent(dentry); |
42 | mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT); |
43 | return dir; |
44 | } |
45 | |
46 | static void unlock_dir(struct dentry *dir) |
47 | { |
48 | mutex_unlock(&dir->d_inode->i_mutex); |
49 | dput(dir); |
50 | } |
51 | |
52 | /** |
53 | * ecryptfs_create_underlying_file |
54 | * @lower_dir_inode: inode of the parent in the lower fs of the new file |
55 | * @dentry: New file's dentry |
56 | * @mode: The mode of the new file |
57 | * @nd: nameidata of ecryptfs' parent's dentry & vfsmount |
58 | * |
59 | * Creates the file in the lower file system. |
60 | * |
61 | * Returns zero on success; non-zero on error condition |
62 | */ |
63 | static int |
64 | ecryptfs_create_underlying_file(struct inode *lower_dir_inode, |
65 | struct dentry *dentry, int mode, |
66 | struct nameidata *nd) |
67 | { |
68 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); |
69 | struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); |
70 | struct dentry *dentry_save; |
71 | struct vfsmount *vfsmount_save; |
72 | int rc; |
73 | |
74 | dentry_save = nd->path.dentry; |
75 | vfsmount_save = nd->path.mnt; |
76 | nd->path.dentry = lower_dentry; |
77 | nd->path.mnt = lower_mnt; |
78 | rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); |
79 | nd->path.dentry = dentry_save; |
80 | nd->path.mnt = vfsmount_save; |
81 | return rc; |
82 | } |
83 | |
84 | /** |
85 | * ecryptfs_do_create |
86 | * @directory_inode: inode of the new file's dentry's parent in ecryptfs |
87 | * @ecryptfs_dentry: New file's dentry in ecryptfs |
88 | * @mode: The mode of the new file |
89 | * @nd: nameidata of ecryptfs' parent's dentry & vfsmount |
90 | * |
91 | * Creates the underlying file and the eCryptfs inode which will link to |
92 | * it. It will also update the eCryptfs directory inode to mimic the |
93 | * stat of the lower directory inode. |
94 | * |
95 | * Returns zero on success; non-zero on error condition |
96 | */ |
97 | static int |
98 | ecryptfs_do_create(struct inode *directory_inode, |
99 | struct dentry *ecryptfs_dentry, int mode, |
100 | struct nameidata *nd) |
101 | { |
102 | int rc; |
103 | struct dentry *lower_dentry; |
104 | struct dentry *lower_dir_dentry; |
105 | |
106 | lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); |
107 | lower_dir_dentry = lock_parent(lower_dentry); |
108 | if (IS_ERR(lower_dir_dentry)) { |
109 | ecryptfs_printk(KERN_ERR, "Error locking directory of " |
110 | "dentry\n"); |
111 | rc = PTR_ERR(lower_dir_dentry); |
112 | goto out; |
113 | } |
114 | rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode, |
115 | ecryptfs_dentry, mode, nd); |
116 | if (rc) { |
117 | printk(KERN_ERR "%s: Failure to create dentry in lower fs; " |
118 | "rc = [%d]\n", __func__, rc); |
119 | goto out_lock; |
120 | } |
121 | rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, |
122 | directory_inode->i_sb, 0); |
123 | if (rc) { |
124 | ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n"); |
125 | goto out_lock; |
126 | } |
127 | fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode); |
128 | fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode); |
129 | out_lock: |
130 | unlock_dir(lower_dir_dentry); |
131 | out: |
132 | return rc; |
133 | } |
134 | |
135 | /** |
136 | * grow_file |
137 | * @ecryptfs_dentry: the eCryptfs dentry |
138 | * |
139 | * This is the code which will grow the file to its correct size. |
140 | */ |
141 | static int grow_file(struct dentry *ecryptfs_dentry) |
142 | { |
143 | struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode; |
144 | struct file fake_file; |
145 | struct ecryptfs_file_info tmp_file_info; |
146 | char zero_virt[] = { 0x00 }; |
147 | int rc = 0; |
148 | |
149 | memset(&fake_file, 0, sizeof(fake_file)); |
150 | fake_file.f_path.dentry = ecryptfs_dentry; |
151 | memset(&tmp_file_info, 0, sizeof(tmp_file_info)); |
152 | ecryptfs_set_file_private(&fake_file, &tmp_file_info); |
153 | ecryptfs_set_file_lower( |
154 | &fake_file, |
155 | ecryptfs_inode_to_private(ecryptfs_inode)->lower_file); |
156 | rc = ecryptfs_write(&fake_file, zero_virt, 0, 1); |
157 | i_size_write(ecryptfs_inode, 0); |
158 | rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode); |
159 | ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat.flags |= |
160 | ECRYPTFS_NEW_FILE; |
161 | return rc; |
162 | } |
163 | |
164 | /** |
165 | * ecryptfs_initialize_file |
166 | * |
167 | * Cause the file to be changed from a basic empty file to an ecryptfs |
168 | * file with a header and first data page. |
169 | * |
170 | * Returns zero on success |
171 | */ |
172 | static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry) |
173 | { |
174 | struct ecryptfs_crypt_stat *crypt_stat = |
175 | &ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat; |
176 | int rc = 0; |
177 | |
178 | if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) { |
179 | ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); |
180 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
181 | goto out; |
182 | } |
183 | crypt_stat->flags |= ECRYPTFS_NEW_FILE; |
184 | ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n"); |
185 | rc = ecryptfs_new_file_context(ecryptfs_dentry); |
186 | if (rc) { |
187 | ecryptfs_printk(KERN_ERR, "Error creating new file " |
188 | "context; rc = [%d]\n", rc); |
189 | goto out; |
190 | } |
191 | if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) { |
192 | rc = ecryptfs_init_persistent_file(ecryptfs_dentry); |
193 | if (rc) { |
194 | printk(KERN_ERR "%s: Error attempting to initialize " |
195 | "the persistent file for the dentry with name " |
196 | "[%s]; rc = [%d]\n", __func__, |
197 | ecryptfs_dentry->d_name.name, rc); |
198 | goto out; |
199 | } |
200 | } |
201 | rc = ecryptfs_write_metadata(ecryptfs_dentry); |
202 | if (rc) { |
203 | printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc); |
204 | goto out; |
205 | } |
206 | rc = grow_file(ecryptfs_dentry); |
207 | if (rc) |
208 | printk(KERN_ERR "Error growing file; rc = [%d]\n", rc); |
209 | out: |
210 | return rc; |
211 | } |
212 | |
213 | /** |
214 | * ecryptfs_create |
215 | * @dir: The inode of the directory in which to create the file. |
216 | * @dentry: The eCryptfs dentry |
217 | * @mode: The mode of the new file. |
218 | * @nd: nameidata |
219 | * |
220 | * Creates a new file. |
221 | * |
222 | * Returns zero on success; non-zero on error condition |
223 | */ |
224 | static int |
225 | ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, |
226 | int mode, struct nameidata *nd) |
227 | { |
228 | int rc; |
229 | |
230 | /* ecryptfs_do_create() calls ecryptfs_interpose() */ |
231 | rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd); |
232 | if (unlikely(rc)) { |
233 | ecryptfs_printk(KERN_WARNING, "Failed to create file in" |
234 | "lower filesystem\n"); |
235 | goto out; |
236 | } |
237 | /* At this point, a file exists on "disk"; we need to make sure |
238 | * that this on disk file is prepared to be an ecryptfs file */ |
239 | rc = ecryptfs_initialize_file(ecryptfs_dentry); |
240 | out: |
241 | return rc; |
242 | } |
243 | |
244 | /** |
245 | * ecryptfs_lookup_and_interpose_lower - Perform a lookup |
246 | */ |
247 | int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, |
248 | struct dentry *lower_dentry, |
249 | struct inode *ecryptfs_dir_inode, |
250 | struct nameidata *ecryptfs_nd) |
251 | { |
252 | struct dentry *lower_dir_dentry; |
253 | struct vfsmount *lower_mnt; |
254 | struct inode *lower_inode; |
255 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
256 | struct ecryptfs_crypt_stat *crypt_stat; |
257 | char *page_virt = NULL; |
258 | u64 file_size; |
259 | int rc = 0; |
260 | |
261 | lower_dir_dentry = lower_dentry->d_parent; |
262 | lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt( |
263 | ecryptfs_dentry->d_parent)); |
264 | lower_inode = lower_dentry->d_inode; |
265 | fsstack_copy_attr_atime(ecryptfs_dir_inode, lower_dir_dentry->d_inode); |
266 | BUG_ON(!atomic_read(&lower_dentry->d_count)); |
267 | ecryptfs_set_dentry_private(ecryptfs_dentry, |
268 | kmem_cache_alloc(ecryptfs_dentry_info_cache, |
269 | GFP_KERNEL)); |
270 | if (!ecryptfs_dentry_to_private(ecryptfs_dentry)) { |
271 | rc = -ENOMEM; |
272 | printk(KERN_ERR "%s: Out of memory whilst attempting " |
273 | "to allocate ecryptfs_dentry_info struct\n", |
274 | __func__); |
275 | goto out_dput; |
276 | } |
277 | ecryptfs_set_dentry_lower(ecryptfs_dentry, lower_dentry); |
278 | ecryptfs_set_dentry_lower_mnt(ecryptfs_dentry, lower_mnt); |
279 | if (!lower_dentry->d_inode) { |
280 | /* We want to add because we couldn't find in lower */ |
281 | d_add(ecryptfs_dentry, NULL); |
282 | goto out; |
283 | } |
284 | rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, |
285 | ecryptfs_dir_inode->i_sb, 1); |
286 | if (rc) { |
287 | printk(KERN_ERR "%s: Error interposing; rc = [%d]\n", |
288 | __func__, rc); |
289 | goto out; |
290 | } |
291 | if (S_ISDIR(lower_inode->i_mode)) |
292 | goto out; |
293 | if (S_ISLNK(lower_inode->i_mode)) |
294 | goto out; |
295 | if (special_file(lower_inode->i_mode)) |
296 | goto out; |
297 | if (!ecryptfs_nd) |
298 | goto out; |
299 | /* Released in this function */ |
300 | page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, GFP_USER); |
301 | if (!page_virt) { |
302 | printk(KERN_ERR "%s: Cannot kmem_cache_zalloc() a page\n", |
303 | __func__); |
304 | rc = -ENOMEM; |
305 | goto out; |
306 | } |
307 | if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) { |
308 | rc = ecryptfs_init_persistent_file(ecryptfs_dentry); |
309 | if (rc) { |
310 | printk(KERN_ERR "%s: Error attempting to initialize " |
311 | "the persistent file for the dentry with name " |
312 | "[%s]; rc = [%d]\n", __func__, |
313 | ecryptfs_dentry->d_name.name, rc); |
314 | goto out_free_kmem; |
315 | } |
316 | } |
317 | crypt_stat = &ecryptfs_inode_to_private( |
318 | ecryptfs_dentry->d_inode)->crypt_stat; |
319 | /* TODO: lock for crypt_stat comparison */ |
320 | if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) |
321 | ecryptfs_set_default_sizes(crypt_stat); |
322 | rc = ecryptfs_read_and_validate_header_region(page_virt, |
323 | ecryptfs_dentry->d_inode); |
324 | if (rc) { |
325 | rc = ecryptfs_read_and_validate_xattr_region(page_virt, |
326 | ecryptfs_dentry); |
327 | if (rc) { |
328 | rc = 0; |
329 | goto out_free_kmem; |
330 | } |
331 | crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR; |
332 | } |
333 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
334 | ecryptfs_dentry->d_sb)->mount_crypt_stat; |
335 | if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) { |
336 | if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) |
337 | file_size = (crypt_stat->num_header_bytes_at_front |
338 | + i_size_read(lower_dentry->d_inode)); |
339 | else |
340 | file_size = i_size_read(lower_dentry->d_inode); |
341 | } else { |
342 | file_size = get_unaligned_be64(page_virt); |
343 | } |
344 | i_size_write(ecryptfs_dentry->d_inode, (loff_t)file_size); |
345 | out_free_kmem: |
346 | kmem_cache_free(ecryptfs_header_cache_2, page_virt); |
347 | goto out; |
348 | out_dput: |
349 | dput(lower_dentry); |
350 | d_drop(ecryptfs_dentry); |
351 | out: |
352 | return rc; |
353 | } |
354 | |
355 | /** |
356 | * ecryptfs_lookup |
357 | * @ecryptfs_dir_inode: The eCryptfs directory inode |
358 | * @ecryptfs_dentry: The eCryptfs dentry that we are looking up |
359 | * @ecryptfs_nd: nameidata; may be NULL |
360 | * |
361 | * Find a file on disk. If the file does not exist, then we'll add it to the |
362 | * dentry cache and continue on to read it from the disk. |
363 | */ |
364 | static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, |
365 | struct dentry *ecryptfs_dentry, |
366 | struct nameidata *ecryptfs_nd) |
367 | { |
368 | char *encrypted_and_encoded_name = NULL; |
369 | size_t encrypted_and_encoded_name_size; |
370 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL; |
371 | struct dentry *lower_dir_dentry, *lower_dentry; |
372 | int rc = 0; |
373 | |
374 | ecryptfs_dentry->d_op = &ecryptfs_dops; |
375 | if ((ecryptfs_dentry->d_name.len == 1 |
376 | && !strcmp(ecryptfs_dentry->d_name.name, ".")) |
377 | || (ecryptfs_dentry->d_name.len == 2 |
378 | && !strcmp(ecryptfs_dentry->d_name.name, ".."))) { |
379 | goto out_d_drop; |
380 | } |
381 | lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent); |
382 | mutex_lock(&lower_dir_dentry->d_inode->i_mutex); |
383 | lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name, |
384 | lower_dir_dentry, |
385 | ecryptfs_dentry->d_name.len); |
386 | mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); |
387 | if (IS_ERR(lower_dentry)) { |
388 | rc = PTR_ERR(lower_dentry); |
389 | printk(KERN_ERR "%s: lookup_one_len() returned [%d] on " |
390 | "lower_dentry = [%s]\n", __func__, rc, |
391 | ecryptfs_dentry->d_name.name); |
392 | goto out_d_drop; |
393 | } |
394 | if (lower_dentry->d_inode) |
395 | goto lookup_and_interpose; |
396 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
397 | ecryptfs_dentry->d_sb)->mount_crypt_stat; |
398 | if (!(mount_crypt_stat |
399 | && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES))) |
400 | goto lookup_and_interpose; |
401 | dput(lower_dentry); |
402 | rc = ecryptfs_encrypt_and_encode_filename( |
403 | &encrypted_and_encoded_name, &encrypted_and_encoded_name_size, |
404 | NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name, |
405 | ecryptfs_dentry->d_name.len); |
406 | if (rc) { |
407 | printk(KERN_ERR "%s: Error attempting to encrypt and encode " |
408 | "filename; rc = [%d]\n", __func__, rc); |
409 | goto out_d_drop; |
410 | } |
411 | mutex_lock(&lower_dir_dentry->d_inode->i_mutex); |
412 | lower_dentry = lookup_one_len(encrypted_and_encoded_name, |
413 | lower_dir_dentry, |
414 | encrypted_and_encoded_name_size - 1); |
415 | mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); |
416 | if (IS_ERR(lower_dentry)) { |
417 | rc = PTR_ERR(lower_dentry); |
418 | printk(KERN_ERR "%s: lookup_one_len() returned [%d] on " |
419 | "lower_dentry = [%s]\n", __func__, rc, |
420 | encrypted_and_encoded_name); |
421 | goto out_d_drop; |
422 | } |
423 | lookup_and_interpose: |
424 | rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry, |
425 | ecryptfs_dir_inode, |
426 | ecryptfs_nd); |
427 | goto out; |
428 | out_d_drop: |
429 | d_drop(ecryptfs_dentry); |
430 | out: |
431 | kfree(encrypted_and_encoded_name); |
432 | return ERR_PTR(rc); |
433 | } |
434 | |
435 | static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, |
436 | struct dentry *new_dentry) |
437 | { |
438 | struct dentry *lower_old_dentry; |
439 | struct dentry *lower_new_dentry; |
440 | struct dentry *lower_dir_dentry; |
441 | u64 file_size_save; |
442 | int rc; |
443 | |
444 | file_size_save = i_size_read(old_dentry->d_inode); |
445 | lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); |
446 | lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); |
447 | dget(lower_old_dentry); |
448 | dget(lower_new_dentry); |
449 | lower_dir_dentry = lock_parent(lower_new_dentry); |
450 | rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, |
451 | lower_new_dentry); |
452 | if (rc || !lower_new_dentry->d_inode) |
453 | goto out_lock; |
454 | rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0); |
455 | if (rc) |
456 | goto out_lock; |
457 | fsstack_copy_attr_times(dir, lower_new_dentry->d_inode); |
458 | fsstack_copy_inode_size(dir, lower_new_dentry->d_inode); |
459 | old_dentry->d_inode->i_nlink = |
460 | ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink; |
461 | i_size_write(new_dentry->d_inode, file_size_save); |
462 | out_lock: |
463 | unlock_dir(lower_dir_dentry); |
464 | dput(lower_new_dentry); |
465 | dput(lower_old_dentry); |
466 | d_drop(lower_old_dentry); |
467 | d_drop(new_dentry); |
468 | d_drop(old_dentry); |
469 | return rc; |
470 | } |
471 | |
472 | static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) |
473 | { |
474 | int rc = 0; |
475 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); |
476 | struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); |
477 | struct dentry *lower_dir_dentry; |
478 | |
479 | lower_dir_dentry = lock_parent(lower_dentry); |
480 | rc = vfs_unlink(lower_dir_inode, lower_dentry); |
481 | if (rc) { |
482 | printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc); |
483 | goto out_unlock; |
484 | } |
485 | fsstack_copy_attr_times(dir, lower_dir_inode); |
486 | dentry->d_inode->i_nlink = |
487 | ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; |
488 | dentry->d_inode->i_ctime = dir->i_ctime; |
489 | d_drop(dentry); |
490 | out_unlock: |
491 | unlock_dir(lower_dir_dentry); |
492 | return rc; |
493 | } |
494 | |
495 | static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, |
496 | const char *symname) |
497 | { |
498 | int rc; |
499 | struct dentry *lower_dentry; |
500 | struct dentry *lower_dir_dentry; |
501 | char *encoded_symname; |
502 | size_t encoded_symlen; |
503 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL; |
504 | |
505 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
506 | dget(lower_dentry); |
507 | lower_dir_dentry = lock_parent(lower_dentry); |
508 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
509 | dir->i_sb)->mount_crypt_stat; |
510 | rc = ecryptfs_encrypt_and_encode_filename(&encoded_symname, |
511 | &encoded_symlen, |
512 | NULL, |
513 | mount_crypt_stat, symname, |
514 | strlen(symname)); |
515 | if (rc) |
516 | goto out_lock; |
517 | rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, |
518 | encoded_symname); |
519 | kfree(encoded_symname); |
520 | if (rc || !lower_dentry->d_inode) |
521 | goto out_lock; |
522 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); |
523 | if (rc) |
524 | goto out_lock; |
525 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
526 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
527 | out_lock: |
528 | unlock_dir(lower_dir_dentry); |
529 | dput(lower_dentry); |
530 | if (!dentry->d_inode) |
531 | d_drop(dentry); |
532 | return rc; |
533 | } |
534 | |
535 | static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
536 | { |
537 | int rc; |
538 | struct dentry *lower_dentry; |
539 | struct dentry *lower_dir_dentry; |
540 | |
541 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
542 | lower_dir_dentry = lock_parent(lower_dentry); |
543 | rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); |
544 | if (rc || !lower_dentry->d_inode) |
545 | goto out; |
546 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); |
547 | if (rc) |
548 | goto out; |
549 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
550 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
551 | dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; |
552 | out: |
553 | unlock_dir(lower_dir_dentry); |
554 | if (!dentry->d_inode) |
555 | d_drop(dentry); |
556 | return rc; |
557 | } |
558 | |
559 | static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) |
560 | { |
561 | struct dentry *lower_dentry; |
562 | struct dentry *lower_dir_dentry; |
563 | int rc; |
564 | |
565 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
566 | dget(dentry); |
567 | lower_dir_dentry = lock_parent(lower_dentry); |
568 | dget(lower_dentry); |
569 | rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); |
570 | dput(lower_dentry); |
571 | if (!rc) |
572 | d_delete(lower_dentry); |
573 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
574 | dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; |
575 | unlock_dir(lower_dir_dentry); |
576 | if (!rc) |
577 | d_drop(dentry); |
578 | dput(dentry); |
579 | return rc; |
580 | } |
581 | |
582 | static int |
583 | ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) |
584 | { |
585 | int rc; |
586 | struct dentry *lower_dentry; |
587 | struct dentry *lower_dir_dentry; |
588 | |
589 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
590 | lower_dir_dentry = lock_parent(lower_dentry); |
591 | rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); |
592 | if (rc || !lower_dentry->d_inode) |
593 | goto out; |
594 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); |
595 | if (rc) |
596 | goto out; |
597 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
598 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
599 | out: |
600 | unlock_dir(lower_dir_dentry); |
601 | if (!dentry->d_inode) |
602 | d_drop(dentry); |
603 | return rc; |
604 | } |
605 | |
606 | static int |
607 | ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
608 | struct inode *new_dir, struct dentry *new_dentry) |
609 | { |
610 | int rc; |
611 | struct dentry *lower_old_dentry; |
612 | struct dentry *lower_new_dentry; |
613 | struct dentry *lower_old_dir_dentry; |
614 | struct dentry *lower_new_dir_dentry; |
615 | |
616 | lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); |
617 | lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); |
618 | dget(lower_old_dentry); |
619 | dget(lower_new_dentry); |
620 | lower_old_dir_dentry = dget_parent(lower_old_dentry); |
621 | lower_new_dir_dentry = dget_parent(lower_new_dentry); |
622 | lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); |
623 | rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, |
624 | lower_new_dir_dentry->d_inode, lower_new_dentry); |
625 | if (rc) |
626 | goto out_lock; |
627 | fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL); |
628 | if (new_dir != old_dir) |
629 | fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL); |
630 | out_lock: |
631 | unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); |
632 | dput(lower_new_dentry->d_parent); |
633 | dput(lower_old_dentry->d_parent); |
634 | dput(lower_new_dentry); |
635 | dput(lower_old_dentry); |
636 | return rc; |
637 | } |
638 | |
639 | static int |
640 | ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz) |
641 | { |
642 | char *lower_buf; |
643 | size_t lower_bufsiz; |
644 | struct dentry *lower_dentry; |
645 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
646 | char *plaintext_name; |
647 | size_t plaintext_name_size; |
648 | mm_segment_t old_fs; |
649 | int rc; |
650 | |
651 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
652 | if (!lower_dentry->d_inode->i_op->readlink) { |
653 | rc = -EINVAL; |
654 | goto out; |
655 | } |
656 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
657 | dentry->d_sb)->mount_crypt_stat; |
658 | /* |
659 | * If the lower filename is encrypted, it will result in a significantly |
660 | * longer name. If needed, truncate the name after decode and decrypt. |
661 | */ |
662 | if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) |
663 | lower_bufsiz = PATH_MAX; |
664 | else |
665 | lower_bufsiz = bufsiz; |
666 | /* Released in this function */ |
667 | lower_buf = kmalloc(lower_bufsiz, GFP_KERNEL); |
668 | if (lower_buf == NULL) { |
669 | printk(KERN_ERR "%s: Out of memory whilst attempting to " |
670 | "kmalloc [%zd] bytes\n", __func__, lower_bufsiz); |
671 | rc = -ENOMEM; |
672 | goto out; |
673 | } |
674 | old_fs = get_fs(); |
675 | set_fs(get_ds()); |
676 | rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, |
677 | (char __user *)lower_buf, |
678 | lower_bufsiz); |
679 | set_fs(old_fs); |
680 | if (rc >= 0) { |
681 | rc = ecryptfs_decode_and_decrypt_filename(&plaintext_name, |
682 | &plaintext_name_size, |
683 | dentry, lower_buf, |
684 | rc); |
685 | if (rc) { |
686 | printk(KERN_ERR "%s: Error attempting to decode and " |
687 | "decrypt filename; rc = [%d]\n", __func__, |
688 | rc); |
689 | goto out_free_lower_buf; |
690 | } |
691 | /* Check for bufsiz <= 0 done in sys_readlinkat() */ |
692 | rc = copy_to_user(buf, plaintext_name, |
693 | min((size_t) bufsiz, plaintext_name_size)); |
694 | if (rc) |
695 | rc = -EFAULT; |
696 | else |
697 | rc = plaintext_name_size; |
698 | kfree(plaintext_name); |
699 | fsstack_copy_attr_atime(dentry->d_inode, lower_dentry->d_inode); |
700 | } |
701 | out_free_lower_buf: |
702 | kfree(lower_buf); |
703 | out: |
704 | return rc; |
705 | } |
706 | |
707 | static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
708 | { |
709 | char *buf; |
710 | int len = PAGE_SIZE, rc; |
711 | mm_segment_t old_fs; |
712 | |
713 | /* Released in ecryptfs_put_link(); only release here on error */ |
714 | buf = kmalloc(len, GFP_KERNEL); |
715 | if (!buf) { |
716 | rc = -ENOMEM; |
717 | goto out; |
718 | } |
719 | old_fs = get_fs(); |
720 | set_fs(get_ds()); |
721 | rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len); |
722 | set_fs(old_fs); |
723 | if (rc < 0) |
724 | goto out_free; |
725 | else |
726 | buf[rc] = '\0'; |
727 | rc = 0; |
728 | nd_set_link(nd, buf); |
729 | goto out; |
730 | out_free: |
731 | kfree(buf); |
732 | out: |
733 | return ERR_PTR(rc); |
734 | } |
735 | |
736 | static void |
737 | ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) |
738 | { |
739 | /* Free the char* */ |
740 | kfree(nd_get_link(nd)); |
741 | } |
742 | |
743 | /** |
744 | * upper_size_to_lower_size |
745 | * @crypt_stat: Crypt_stat associated with file |
746 | * @upper_size: Size of the upper file |
747 | * |
748 | * Calculate the required size of the lower file based on the |
749 | * specified size of the upper file. This calculation is based on the |
750 | * number of headers in the underlying file and the extent size. |
751 | * |
752 | * Returns Calculated size of the lower file. |
753 | */ |
754 | static loff_t |
755 | upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, |
756 | loff_t upper_size) |
757 | { |
758 | loff_t lower_size; |
759 | |
760 | lower_size = crypt_stat->num_header_bytes_at_front; |
761 | if (upper_size != 0) { |
762 | loff_t num_extents; |
763 | |
764 | num_extents = upper_size >> crypt_stat->extent_shift; |
765 | if (upper_size & ~crypt_stat->extent_mask) |
766 | num_extents++; |
767 | lower_size += (num_extents * crypt_stat->extent_size); |
768 | } |
769 | return lower_size; |
770 | } |
771 | |
772 | /** |
773 | * ecryptfs_truncate |
774 | * @dentry: The ecryptfs layer dentry |
775 | * @new_length: The length to expand the file to |
776 | * |
777 | * Function to handle truncations modifying the size of the file. Note |
778 | * that the file sizes are interpolated. When expanding, we are simply |
779 | * writing strings of 0's out. When truncating, we need to modify the |
780 | * underlying file size according to the page index interpolations. |
781 | * |
782 | * Returns zero on success; non-zero otherwise |
783 | */ |
784 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) |
785 | { |
786 | int rc = 0; |
787 | struct inode *inode = dentry->d_inode; |
788 | struct dentry *lower_dentry; |
789 | struct file fake_ecryptfs_file; |
790 | struct ecryptfs_crypt_stat *crypt_stat; |
791 | loff_t i_size = i_size_read(inode); |
792 | loff_t lower_size_before_truncate; |
793 | loff_t lower_size_after_truncate; |
794 | |
795 | if (unlikely((new_length == i_size))) |
796 | goto out; |
797 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; |
798 | /* Set up a fake ecryptfs file, this is used to interface with |
799 | * the file in the underlying filesystem so that the |
800 | * truncation has an effect there as well. */ |
801 | memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file)); |
802 | fake_ecryptfs_file.f_path.dentry = dentry; |
803 | /* Released at out_free: label */ |
804 | ecryptfs_set_file_private(&fake_ecryptfs_file, |
805 | kmem_cache_alloc(ecryptfs_file_info_cache, |
806 | GFP_KERNEL)); |
807 | if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) { |
808 | rc = -ENOMEM; |
809 | goto out; |
810 | } |
811 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
812 | ecryptfs_set_file_lower( |
813 | &fake_ecryptfs_file, |
814 | ecryptfs_inode_to_private(dentry->d_inode)->lower_file); |
815 | /* Switch on growing or shrinking file */ |
816 | if (new_length > i_size) { |
817 | char zero[] = { 0x00 }; |
818 | |
819 | /* Write a single 0 at the last position of the file; |
820 | * this triggers code that will fill in 0's throughout |
821 | * the intermediate portion of the previous end of the |
822 | * file and the new and of the file */ |
823 | rc = ecryptfs_write(&fake_ecryptfs_file, zero, |
824 | (new_length - 1), 1); |
825 | } else { /* new_length < i_size_read(inode) */ |
826 | /* We're chopping off all the pages down do the page |
827 | * in which new_length is located. Fill in the end of |
828 | * that page from (new_length & ~PAGE_CACHE_MASK) to |
829 | * PAGE_CACHE_SIZE with zeros. */ |
830 | size_t num_zeros = (PAGE_CACHE_SIZE |
831 | - (new_length & ~PAGE_CACHE_MASK)); |
832 | |
833 | if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { |
834 | rc = vmtruncate(inode, new_length); |
835 | if (rc) |
836 | goto out_free; |
837 | rc = vmtruncate(lower_dentry->d_inode, new_length); |
838 | goto out_free; |
839 | } |
840 | if (num_zeros) { |
841 | char *zeros_virt; |
842 | |
843 | zeros_virt = kzalloc(num_zeros, GFP_KERNEL); |
844 | if (!zeros_virt) { |
845 | rc = -ENOMEM; |
846 | goto out_free; |
847 | } |
848 | rc = ecryptfs_write(&fake_ecryptfs_file, zeros_virt, |
849 | new_length, num_zeros); |
850 | kfree(zeros_virt); |
851 | if (rc) { |
852 | printk(KERN_ERR "Error attempting to zero out " |
853 | "the remainder of the end page on " |
854 | "reducing truncate; rc = [%d]\n", rc); |
855 | goto out_free; |
856 | } |
857 | } |
858 | vmtruncate(inode, new_length); |
859 | rc = ecryptfs_write_inode_size_to_metadata(inode); |
860 | if (rc) { |
861 | printk(KERN_ERR "Problem with " |
862 | "ecryptfs_write_inode_size_to_metadata; " |
863 | "rc = [%d]\n", rc); |
864 | goto out_free; |
865 | } |
866 | /* We are reducing the size of the ecryptfs file, and need to |
867 | * know if we need to reduce the size of the lower file. */ |
868 | lower_size_before_truncate = |
869 | upper_size_to_lower_size(crypt_stat, i_size); |
870 | lower_size_after_truncate = |
871 | upper_size_to_lower_size(crypt_stat, new_length); |
872 | if (lower_size_after_truncate < lower_size_before_truncate) |
873 | vmtruncate(lower_dentry->d_inode, |
874 | lower_size_after_truncate); |
875 | } |
876 | out_free: |
877 | if (ecryptfs_file_to_private(&fake_ecryptfs_file)) |
878 | kmem_cache_free(ecryptfs_file_info_cache, |
879 | ecryptfs_file_to_private(&fake_ecryptfs_file)); |
880 | out: |
881 | return rc; |
882 | } |
883 | |
884 | static int |
885 | ecryptfs_permission(struct inode *inode, int mask) |
886 | { |
887 | return inode_permission(ecryptfs_inode_to_lower(inode), mask); |
888 | } |
889 | |
890 | /** |
891 | * ecryptfs_setattr |
892 | * @dentry: dentry handle to the inode to modify |
893 | * @ia: Structure with flags of what to change and values |
894 | * |
895 | * Updates the metadata of an inode. If the update is to the size |
896 | * i.e. truncation, then ecryptfs_truncate will handle the size modification |
897 | * of both the ecryptfs inode and the lower inode. |
898 | * |
899 | * All other metadata changes will be passed right to the lower filesystem, |
900 | * and we will just update our inode to look like the lower. |
901 | */ |
902 | static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) |
903 | { |
904 | int rc = 0; |
905 | struct dentry *lower_dentry; |
906 | struct inode *inode; |
907 | struct inode *lower_inode; |
908 | struct ecryptfs_crypt_stat *crypt_stat; |
909 | |
910 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; |
911 | if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) |
912 | ecryptfs_init_crypt_stat(crypt_stat); |
913 | inode = dentry->d_inode; |
914 | lower_inode = ecryptfs_inode_to_lower(inode); |
915 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
916 | mutex_lock(&crypt_stat->cs_mutex); |
917 | if (S_ISDIR(dentry->d_inode->i_mode)) |
918 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
919 | else if (S_ISREG(dentry->d_inode->i_mode) |
920 | && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED) |
921 | || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) { |
922 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
923 | |
924 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
925 | dentry->d_sb)->mount_crypt_stat; |
926 | rc = ecryptfs_read_metadata(dentry); |
927 | if (rc) { |
928 | if (!(mount_crypt_stat->flags |
929 | & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) { |
930 | rc = -EIO; |
931 | printk(KERN_WARNING "Either the lower file " |
932 | "is not in a valid eCryptfs format, " |
933 | "or the key could not be retrieved. " |
934 | "Plaintext passthrough mode is not " |
935 | "enabled; returning -EIO\n"); |
936 | mutex_unlock(&crypt_stat->cs_mutex); |
937 | goto out; |
938 | } |
939 | rc = 0; |
940 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
941 | } |
942 | } |
943 | mutex_unlock(&crypt_stat->cs_mutex); |
944 | if (ia->ia_valid & ATTR_SIZE) { |
945 | ecryptfs_printk(KERN_DEBUG, |
946 | "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n", |
947 | ia->ia_valid, ATTR_SIZE); |
948 | rc = ecryptfs_truncate(dentry, ia->ia_size); |
949 | /* ecryptfs_truncate handles resizing of the lower file */ |
950 | ia->ia_valid &= ~ATTR_SIZE; |
951 | ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n", |
952 | ia->ia_valid); |
953 | if (rc < 0) |
954 | goto out; |
955 | } |
956 | |
957 | /* |
958 | * mode change is for clearing setuid/setgid bits. Allow lower fs |
959 | * to interpret this in its own way. |
960 | */ |
961 | if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
962 | ia->ia_valid &= ~ATTR_MODE; |
963 | |
964 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
965 | rc = notify_change(lower_dentry, ia); |
966 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
967 | out: |
968 | fsstack_copy_attr_all(inode, lower_inode, NULL); |
969 | return rc; |
970 | } |
971 | |
972 | int |
973 | ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, |
974 | size_t size, int flags) |
975 | { |
976 | int rc = 0; |
977 | struct dentry *lower_dentry; |
978 | |
979 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
980 | if (!lower_dentry->d_inode->i_op->setxattr) { |
981 | rc = -ENOSYS; |
982 | goto out; |
983 | } |
984 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
985 | rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, |
986 | size, flags); |
987 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
988 | out: |
989 | return rc; |
990 | } |
991 | |
992 | ssize_t |
993 | ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, |
994 | void *value, size_t size) |
995 | { |
996 | int rc = 0; |
997 | |
998 | if (!lower_dentry->d_inode->i_op->getxattr) { |
999 | rc = -ENOSYS; |
1000 | goto out; |
1001 | } |
1002 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
1003 | rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, |
1004 | size); |
1005 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
1006 | out: |
1007 | return rc; |
1008 | } |
1009 | |
1010 | static ssize_t |
1011 | ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, |
1012 | size_t size) |
1013 | { |
1014 | return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name, |
1015 | value, size); |
1016 | } |
1017 | |
1018 | static ssize_t |
1019 | ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) |
1020 | { |
1021 | int rc = 0; |
1022 | struct dentry *lower_dentry; |
1023 | |
1024 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
1025 | if (!lower_dentry->d_inode->i_op->listxattr) { |
1026 | rc = -ENOSYS; |
1027 | goto out; |
1028 | } |
1029 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
1030 | rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size); |
1031 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
1032 | out: |
1033 | return rc; |
1034 | } |
1035 | |
1036 | static int ecryptfs_removexattr(struct dentry *dentry, const char *name) |
1037 | { |
1038 | int rc = 0; |
1039 | struct dentry *lower_dentry; |
1040 | |
1041 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
1042 | if (!lower_dentry->d_inode->i_op->removexattr) { |
1043 | rc = -ENOSYS; |
1044 | goto out; |
1045 | } |
1046 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
1047 | rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); |
1048 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
1049 | out: |
1050 | return rc; |
1051 | } |
1052 | |
1053 | int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode) |
1054 | { |
1055 | if ((ecryptfs_inode_to_lower(inode) |
1056 | == (struct inode *)candidate_lower_inode)) |
1057 | return 1; |
1058 | else |
1059 | return 0; |
1060 | } |
1061 | |
1062 | int ecryptfs_inode_set(struct inode *inode, void *lower_inode) |
1063 | { |
1064 | ecryptfs_init_inode(inode, (struct inode *)lower_inode); |
1065 | return 0; |
1066 | } |
1067 | |
1068 | const struct inode_operations ecryptfs_symlink_iops = { |
1069 | .readlink = ecryptfs_readlink, |
1070 | .follow_link = ecryptfs_follow_link, |
1071 | .put_link = ecryptfs_put_link, |
1072 | .permission = ecryptfs_permission, |
1073 | .setattr = ecryptfs_setattr, |
1074 | .setxattr = ecryptfs_setxattr, |
1075 | .getxattr = ecryptfs_getxattr, |
1076 | .listxattr = ecryptfs_listxattr, |
1077 | .removexattr = ecryptfs_removexattr |
1078 | }; |
1079 | |
1080 | const struct inode_operations ecryptfs_dir_iops = { |
1081 | .create = ecryptfs_create, |
1082 | .lookup = ecryptfs_lookup, |
1083 | .link = ecryptfs_link, |
1084 | .unlink = ecryptfs_unlink, |
1085 | .symlink = ecryptfs_symlink, |
1086 | .mkdir = ecryptfs_mkdir, |
1087 | .rmdir = ecryptfs_rmdir, |
1088 | .mknod = ecryptfs_mknod, |
1089 | .rename = ecryptfs_rename, |
1090 | .permission = ecryptfs_permission, |
1091 | .setattr = ecryptfs_setattr, |
1092 | .setxattr = ecryptfs_setxattr, |
1093 | .getxattr = ecryptfs_getxattr, |
1094 | .listxattr = ecryptfs_listxattr, |
1095 | .removexattr = ecryptfs_removexattr |
1096 | }; |
1097 | |
1098 | const struct inode_operations ecryptfs_main_iops = { |
1099 | .permission = ecryptfs_permission, |
1100 | .setattr = ecryptfs_setattr, |
1101 | .setxattr = ecryptfs_setxattr, |
1102 | .getxattr = ecryptfs_getxattr, |
1103 | .listxattr = ecryptfs_listxattr, |
1104 | .removexattr = ecryptfs_removexattr |
1105 | }; |
1106 |
Branches:
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ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9