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237fead6 MH |
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) 2004-2006 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 "ecryptfs_kernel.h" | |
34 | ||
35 | static struct dentry *lock_parent(struct dentry *dentry) | |
36 | { | |
37 | struct dentry *dir; | |
38 | ||
39 | dir = dget(dentry->d_parent); | |
40 | mutex_lock(&(dir->d_inode->i_mutex)); | |
41 | return dir; | |
42 | } | |
43 | ||
44 | static void unlock_parent(struct dentry *dentry) | |
45 | { | |
46 | mutex_unlock(&(dentry->d_parent->d_inode->i_mutex)); | |
47 | dput(dentry->d_parent); | |
48 | } | |
49 | ||
50 | static void unlock_dir(struct dentry *dir) | |
51 | { | |
52 | mutex_unlock(&dir->d_inode->i_mutex); | |
53 | dput(dir); | |
54 | } | |
55 | ||
56 | void ecryptfs_copy_inode_size(struct inode *dst, const struct inode *src) | |
57 | { | |
58 | i_size_write(dst, i_size_read((struct inode *)src)); | |
59 | dst->i_blocks = src->i_blocks; | |
60 | } | |
61 | ||
62 | void ecryptfs_copy_attr_atime(struct inode *dest, const struct inode *src) | |
63 | { | |
64 | dest->i_atime = src->i_atime; | |
65 | } | |
66 | ||
67 | static void ecryptfs_copy_attr_times(struct inode *dest, | |
68 | const struct inode *src) | |
69 | { | |
70 | dest->i_atime = src->i_atime; | |
71 | dest->i_mtime = src->i_mtime; | |
72 | dest->i_ctime = src->i_ctime; | |
73 | } | |
74 | ||
75 | static void ecryptfs_copy_attr_timesizes(struct inode *dest, | |
76 | const struct inode *src) | |
77 | { | |
78 | dest->i_atime = src->i_atime; | |
79 | dest->i_mtime = src->i_mtime; | |
80 | dest->i_ctime = src->i_ctime; | |
81 | ecryptfs_copy_inode_size(dest, src); | |
82 | } | |
83 | ||
84 | void ecryptfs_copy_attr_all(struct inode *dest, const struct inode *src) | |
85 | { | |
86 | dest->i_mode = src->i_mode; | |
87 | dest->i_nlink = src->i_nlink; | |
88 | dest->i_uid = src->i_uid; | |
89 | dest->i_gid = src->i_gid; | |
90 | dest->i_rdev = src->i_rdev; | |
91 | dest->i_atime = src->i_atime; | |
92 | dest->i_mtime = src->i_mtime; | |
93 | dest->i_ctime = src->i_ctime; | |
94 | dest->i_blkbits = src->i_blkbits; | |
95 | dest->i_flags = src->i_flags; | |
96 | } | |
97 | ||
98 | /** | |
99 | * ecryptfs_create_underlying_file | |
100 | * @lower_dir_inode: inode of the parent in the lower fs of the new file | |
101 | * @lower_dentry: New file's dentry in the lower fs | |
102 | * @ecryptfs_dentry: New file's dentry in ecryptfs | |
103 | * @mode: The mode of the new file | |
104 | * @nd: nameidata of ecryptfs' parent's dentry & vfsmount | |
105 | * | |
106 | * Creates the file in the lower file system. | |
107 | * | |
108 | * Returns zero on success; non-zero on error condition | |
109 | */ | |
110 | static int | |
111 | ecryptfs_create_underlying_file(struct inode *lower_dir_inode, | |
112 | struct dentry *dentry, int mode, | |
113 | struct nameidata *nd) | |
114 | { | |
115 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
116 | struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); | |
117 | struct dentry *dentry_save; | |
118 | struct vfsmount *vfsmount_save; | |
119 | int rc; | |
120 | ||
121 | dentry_save = nd->dentry; | |
122 | vfsmount_save = nd->mnt; | |
123 | nd->dentry = lower_dentry; | |
124 | nd->mnt = lower_mnt; | |
125 | rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); | |
126 | nd->dentry = dentry_save; | |
127 | nd->mnt = vfsmount_save; | |
128 | return rc; | |
129 | } | |
130 | ||
131 | /** | |
132 | * ecryptfs_do_create | |
133 | * @directory_inode: inode of the new file's dentry's parent in ecryptfs | |
134 | * @ecryptfs_dentry: New file's dentry in ecryptfs | |
135 | * @mode: The mode of the new file | |
136 | * @nd: nameidata of ecryptfs' parent's dentry & vfsmount | |
137 | * | |
138 | * Creates the underlying file and the eCryptfs inode which will link to | |
139 | * it. It will also update the eCryptfs directory inode to mimic the | |
140 | * stat of the lower directory inode. | |
141 | * | |
142 | * Returns zero on success; non-zero on error condition | |
143 | */ | |
144 | static int | |
145 | ecryptfs_do_create(struct inode *directory_inode, | |
146 | struct dentry *ecryptfs_dentry, int mode, | |
147 | struct nameidata *nd) | |
148 | { | |
149 | int rc; | |
150 | struct dentry *lower_dentry; | |
151 | struct dentry *lower_dir_dentry; | |
152 | ||
153 | lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); | |
154 | lower_dir_dentry = lock_parent(lower_dentry); | |
155 | if (unlikely(IS_ERR(lower_dir_dentry))) { | |
156 | ecryptfs_printk(KERN_ERR, "Error locking directory of " | |
157 | "dentry\n"); | |
158 | rc = PTR_ERR(lower_dir_dentry); | |
159 | goto out; | |
160 | } | |
161 | rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode, | |
162 | ecryptfs_dentry, mode, nd); | |
163 | if (unlikely(rc)) { | |
164 | ecryptfs_printk(KERN_ERR, | |
165 | "Failure to create underlying file\n"); | |
166 | goto out_lock; | |
167 | } | |
168 | rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, | |
169 | directory_inode->i_sb, 0); | |
170 | if (rc) { | |
171 | ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n"); | |
172 | goto out_lock; | |
173 | } | |
174 | ecryptfs_copy_attr_timesizes(directory_inode, | |
175 | lower_dir_dentry->d_inode); | |
176 | out_lock: | |
177 | unlock_dir(lower_dir_dentry); | |
178 | out: | |
179 | return rc; | |
180 | } | |
181 | ||
182 | /** | |
183 | * grow_file | |
184 | * @ecryptfs_dentry: the ecryptfs dentry | |
185 | * @lower_file: The lower file | |
186 | * @inode: The ecryptfs inode | |
187 | * @lower_inode: The lower inode | |
188 | * | |
189 | * This is the code which will grow the file to its correct size. | |
190 | */ | |
191 | static int grow_file(struct dentry *ecryptfs_dentry, struct file *lower_file, | |
192 | struct inode *inode, struct inode *lower_inode) | |
193 | { | |
194 | int rc = 0; | |
195 | struct file fake_file; | |
196 | struct ecryptfs_file_info tmp_file_info; | |
197 | ||
198 | memset(&fake_file, 0, sizeof(fake_file)); | |
199 | fake_file.f_dentry = ecryptfs_dentry; | |
200 | memset(&tmp_file_info, 0, sizeof(tmp_file_info)); | |
201 | ecryptfs_set_file_private(&fake_file, &tmp_file_info); | |
202 | ecryptfs_set_file_lower(&fake_file, lower_file); | |
203 | rc = ecryptfs_fill_zeros(&fake_file, 1); | |
204 | if (rc) { | |
205 | ECRYPTFS_SET_FLAG( | |
206 | ecryptfs_inode_to_private(inode)->crypt_stat.flags, | |
207 | ECRYPTFS_SECURITY_WARNING); | |
208 | ecryptfs_printk(KERN_WARNING, "Error attempting to fill zeros " | |
209 | "in file; rc = [%d]\n", rc); | |
210 | goto out; | |
211 | } | |
212 | i_size_write(inode, 0); | |
213 | ecryptfs_write_inode_size_to_header(lower_file, lower_inode, inode); | |
214 | ECRYPTFS_SET_FLAG(ecryptfs_inode_to_private(inode)->crypt_stat.flags, | |
215 | ECRYPTFS_NEW_FILE); | |
216 | out: | |
217 | return rc; | |
218 | } | |
219 | ||
220 | /** | |
221 | * ecryptfs_initialize_file | |
222 | * | |
223 | * Cause the file to be changed from a basic empty file to an ecryptfs | |
224 | * file with a header and first data page. | |
225 | * | |
226 | * Returns zero on success | |
227 | */ | |
228 | static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry) | |
229 | { | |
230 | int rc = 0; | |
231 | int lower_flags; | |
232 | struct ecryptfs_crypt_stat *crypt_stat; | |
233 | struct dentry *lower_dentry; | |
237fead6 MH |
234 | struct file *lower_file; |
235 | struct inode *inode, *lower_inode; | |
236 | struct vfsmount *lower_mnt; | |
237 | ||
238 | lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); | |
239 | ecryptfs_printk(KERN_DEBUG, "lower_dentry->d_name.name = [%s]\n", | |
240 | lower_dentry->d_name.name); | |
241 | inode = ecryptfs_dentry->d_inode; | |
242 | crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; | |
237fead6 MH |
243 | lower_flags = ((O_CREAT | O_WRONLY | O_TRUNC) & O_ACCMODE) | O_RDWR; |
244 | #if BITS_PER_LONG != 32 | |
245 | lower_flags |= O_LARGEFILE; | |
246 | #endif | |
247 | lower_mnt = ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry); | |
237fead6 | 248 | /* Corresponding fput() at end of this function */ |
7ff1d74f MH |
249 | if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt, |
250 | lower_flags))) { | |
237fead6 MH |
251 | ecryptfs_printk(KERN_ERR, |
252 | "Error opening dentry; rc = [%i]\n", rc); | |
253 | goto out; | |
254 | } | |
7ff1d74f | 255 | lower_inode = lower_dentry->d_inode; |
237fead6 MH |
256 | if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) { |
257 | ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); | |
258 | ECRYPTFS_CLEAR_FLAG(crypt_stat->flags, ECRYPTFS_ENCRYPTED); | |
259 | goto out_fput; | |
260 | } | |
261 | ECRYPTFS_SET_FLAG(crypt_stat->flags, ECRYPTFS_NEW_FILE); | |
262 | ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n"); | |
263 | rc = ecryptfs_new_file_context(ecryptfs_dentry); | |
264 | if (rc) { | |
265 | ecryptfs_printk(KERN_DEBUG, "Error creating new file " | |
266 | "context\n"); | |
267 | goto out_fput; | |
268 | } | |
269 | rc = ecryptfs_write_headers(ecryptfs_dentry, lower_file); | |
270 | if (rc) { | |
271 | ecryptfs_printk(KERN_DEBUG, "Error writing headers\n"); | |
272 | goto out_fput; | |
273 | } | |
274 | rc = grow_file(ecryptfs_dentry, lower_file, inode, lower_inode); | |
275 | out_fput: | |
7ff1d74f MH |
276 | if ((rc = ecryptfs_close_lower_file(lower_file))) |
277 | printk(KERN_ERR "Error closing lower_file\n"); | |
237fead6 MH |
278 | out: |
279 | return rc; | |
280 | } | |
281 | ||
282 | /** | |
283 | * ecryptfs_create | |
284 | * @dir: The inode of the directory in which to create the file. | |
285 | * @dentry: The eCryptfs dentry | |
286 | * @mode: The mode of the new file. | |
287 | * @nd: nameidata | |
288 | * | |
289 | * Creates a new file. | |
290 | * | |
291 | * Returns zero on success; non-zero on error condition | |
292 | */ | |
293 | static int | |
294 | ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, | |
295 | int mode, struct nameidata *nd) | |
296 | { | |
297 | int rc; | |
298 | ||
299 | rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd); | |
300 | if (unlikely(rc)) { | |
301 | ecryptfs_printk(KERN_WARNING, "Failed to create file in" | |
302 | "lower filesystem\n"); | |
303 | goto out; | |
304 | } | |
305 | /* At this point, a file exists on "disk"; we need to make sure | |
306 | * that this on disk file is prepared to be an ecryptfs file */ | |
307 | rc = ecryptfs_initialize_file(ecryptfs_dentry); | |
308 | out: | |
309 | return rc; | |
310 | } | |
311 | ||
312 | /** | |
313 | * ecryptfs_lookup | |
314 | * @dir: inode | |
315 | * @dentry: The dentry | |
316 | * @nd: nameidata, may be NULL | |
317 | * | |
318 | * Find a file on disk. If the file does not exist, then we'll add it to the | |
319 | * dentry cache and continue on to read it from the disk. | |
320 | */ | |
321 | static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry, | |
322 | struct nameidata *nd) | |
323 | { | |
324 | int rc = 0; | |
325 | struct dentry *lower_dir_dentry; | |
326 | struct dentry *lower_dentry; | |
327 | struct vfsmount *lower_mnt; | |
328 | struct dentry *tlower_dentry = NULL; | |
329 | char *encoded_name; | |
330 | unsigned int encoded_namelen; | |
331 | struct ecryptfs_crypt_stat *crypt_stat = NULL; | |
332 | char *page_virt = NULL; | |
333 | struct inode *lower_inode; | |
334 | u64 file_size; | |
335 | ||
336 | lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent); | |
337 | dentry->d_op = &ecryptfs_dops; | |
338 | if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, ".")) | |
339 | || (dentry->d_name.len == 2 && !strcmp(dentry->d_name.name, ".."))) | |
340 | goto out_drop; | |
341 | encoded_namelen = ecryptfs_encode_filename(crypt_stat, | |
342 | dentry->d_name.name, | |
343 | dentry->d_name.len, | |
344 | &encoded_name); | |
345 | if (encoded_namelen < 0) { | |
346 | rc = encoded_namelen; | |
347 | goto out_drop; | |
348 | } | |
349 | ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen " | |
350 | "= [%d]\n", encoded_name, encoded_namelen); | |
351 | lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry, | |
352 | encoded_namelen - 1); | |
353 | kfree(encoded_name); | |
354 | lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); | |
355 | if (IS_ERR(lower_dentry)) { | |
356 | ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n"); | |
357 | rc = PTR_ERR(lower_dentry); | |
358 | goto out_drop; | |
359 | } | |
360 | ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->" | |
361 | "d_name.name = [%s]\n", lower_dentry, | |
362 | lower_dentry->d_name.name); | |
363 | lower_inode = lower_dentry->d_inode; | |
364 | ecryptfs_copy_attr_atime(dir, lower_dir_dentry->d_inode); | |
365 | BUG_ON(!atomic_read(&lower_dentry->d_count)); | |
366 | ecryptfs_set_dentry_private(dentry, | |
367 | kmem_cache_alloc(ecryptfs_dentry_info_cache, | |
368 | SLAB_KERNEL)); | |
369 | if (!ecryptfs_dentry_to_private(dentry)) { | |
370 | rc = -ENOMEM; | |
371 | ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting " | |
372 | "to allocate ecryptfs_dentry_info struct\n"); | |
373 | goto out_dput; | |
374 | } | |
375 | ecryptfs_set_dentry_lower(dentry, lower_dentry); | |
376 | ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); | |
377 | if (!lower_dentry->d_inode) { | |
378 | /* We want to add because we couldn't find in lower */ | |
379 | d_add(dentry, NULL); | |
380 | goto out; | |
381 | } | |
382 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1); | |
383 | if (rc) { | |
384 | ecryptfs_printk(KERN_ERR, "Error interposing\n"); | |
385 | goto out_dput; | |
386 | } | |
387 | if (S_ISDIR(lower_inode->i_mode)) { | |
388 | ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n"); | |
389 | goto out; | |
390 | } | |
391 | if (S_ISLNK(lower_inode->i_mode)) { | |
392 | ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n"); | |
393 | goto out; | |
394 | } | |
395 | if (!nd) { | |
396 | ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave" | |
397 | "as we *think* we are about to unlink\n"); | |
398 | goto out; | |
399 | } | |
400 | tlower_dentry = dget(lower_dentry); | |
401 | if (!tlower_dentry || IS_ERR(tlower_dentry)) { | |
402 | rc = -ENOMEM; | |
403 | ecryptfs_printk(KERN_ERR, "Cannot dget lower_dentry\n"); | |
404 | goto out_dput; | |
405 | } | |
406 | /* Released in this function */ | |
407 | page_virt = | |
408 | (char *)kmem_cache_alloc(ecryptfs_header_cache_2, | |
409 | SLAB_USER); | |
410 | if (!page_virt) { | |
411 | rc = -ENOMEM; | |
412 | ecryptfs_printk(KERN_ERR, | |
413 | "Cannot ecryptfs_kmalloc a page\n"); | |
414 | goto out_dput; | |
415 | } | |
416 | memset(page_virt, 0, PAGE_CACHE_SIZE); | |
417 | rc = ecryptfs_read_header_region(page_virt, tlower_dentry, nd->mnt); | |
418 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; | |
419 | if (!ECRYPTFS_CHECK_FLAG(crypt_stat->flags, ECRYPTFS_POLICY_APPLIED)) | |
420 | ecryptfs_set_default_sizes(crypt_stat); | |
421 | if (rc) { | |
422 | rc = 0; | |
423 | ecryptfs_printk(KERN_WARNING, "Error reading header region;" | |
424 | " assuming unencrypted\n"); | |
425 | } else { | |
426 | if (!contains_ecryptfs_marker(page_virt | |
427 | + ECRYPTFS_FILE_SIZE_BYTES)) { | |
428 | kmem_cache_free(ecryptfs_header_cache_2, page_virt); | |
429 | goto out; | |
430 | } | |
431 | memcpy(&file_size, page_virt, sizeof(file_size)); | |
432 | file_size = be64_to_cpu(file_size); | |
433 | i_size_write(dentry->d_inode, (loff_t)file_size); | |
434 | } | |
435 | kmem_cache_free(ecryptfs_header_cache_2, page_virt); | |
436 | goto out; | |
437 | ||
438 | out_dput: | |
439 | dput(lower_dentry); | |
440 | if (tlower_dentry) | |
441 | dput(tlower_dentry); | |
442 | out_drop: | |
443 | d_drop(dentry); | |
444 | out: | |
445 | return ERR_PTR(rc); | |
446 | } | |
447 | ||
448 | static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, | |
449 | struct dentry *new_dentry) | |
450 | { | |
451 | struct dentry *lower_old_dentry; | |
452 | struct dentry *lower_new_dentry; | |
453 | struct dentry *lower_dir_dentry; | |
454 | u64 file_size_save; | |
455 | int rc; | |
456 | ||
457 | file_size_save = i_size_read(old_dentry->d_inode); | |
458 | lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); | |
459 | lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); | |
460 | dget(lower_old_dentry); | |
461 | dget(lower_new_dentry); | |
462 | lower_dir_dentry = lock_parent(lower_new_dentry); | |
463 | rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, | |
464 | lower_new_dentry); | |
465 | if (rc || !lower_new_dentry->d_inode) | |
466 | goto out_lock; | |
467 | rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0); | |
468 | if (rc) | |
469 | goto out_lock; | |
470 | ecryptfs_copy_attr_timesizes(dir, lower_new_dentry->d_inode); | |
471 | old_dentry->d_inode->i_nlink = | |
472 | ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink; | |
473 | i_size_write(new_dentry->d_inode, file_size_save); | |
474 | out_lock: | |
475 | unlock_dir(lower_dir_dentry); | |
476 | dput(lower_new_dentry); | |
477 | dput(lower_old_dentry); | |
478 | if (!new_dentry->d_inode) | |
479 | d_drop(new_dentry); | |
480 | return rc; | |
481 | } | |
482 | ||
483 | static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) | |
484 | { | |
485 | int rc = 0; | |
486 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
487 | struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); | |
488 | ||
489 | lock_parent(lower_dentry); | |
490 | rc = vfs_unlink(lower_dir_inode, lower_dentry); | |
491 | if (rc) { | |
492 | ecryptfs_printk(KERN_ERR, "Error in vfs_unlink\n"); | |
493 | goto out_unlock; | |
494 | } | |
495 | ecryptfs_copy_attr_times(dir, lower_dir_inode); | |
496 | dentry->d_inode->i_nlink = | |
497 | ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; | |
498 | dentry->d_inode->i_ctime = dir->i_ctime; | |
499 | out_unlock: | |
500 | unlock_parent(lower_dentry); | |
501 | return rc; | |
502 | } | |
503 | ||
504 | static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, | |
505 | const char *symname) | |
506 | { | |
507 | int rc; | |
508 | struct dentry *lower_dentry; | |
509 | struct dentry *lower_dir_dentry; | |
510 | umode_t mode; | |
511 | char *encoded_symname; | |
512 | unsigned int encoded_symlen; | |
513 | struct ecryptfs_crypt_stat *crypt_stat = NULL; | |
514 | ||
515 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
516 | dget(lower_dentry); | |
517 | lower_dir_dentry = lock_parent(lower_dentry); | |
518 | mode = S_IALLUGO; | |
519 | encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname, | |
520 | strlen(symname), | |
521 | &encoded_symname); | |
522 | if (encoded_symlen < 0) { | |
523 | rc = encoded_symlen; | |
524 | goto out_lock; | |
525 | } | |
526 | rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, | |
527 | encoded_symname, mode); | |
528 | kfree(encoded_symname); | |
529 | if (rc || !lower_dentry->d_inode) | |
530 | goto out_lock; | |
531 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); | |
532 | if (rc) | |
533 | goto out_lock; | |
534 | ecryptfs_copy_attr_timesizes(dir, lower_dir_dentry->d_inode); | |
535 | out_lock: | |
536 | unlock_dir(lower_dir_dentry); | |
537 | dput(lower_dentry); | |
538 | if (!dentry->d_inode) | |
539 | d_drop(dentry); | |
540 | return rc; | |
541 | } | |
542 | ||
543 | static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
544 | { | |
545 | int rc; | |
546 | struct dentry *lower_dentry; | |
547 | struct dentry *lower_dir_dentry; | |
548 | ||
549 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
550 | lower_dir_dentry = lock_parent(lower_dentry); | |
551 | rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); | |
552 | if (rc || !lower_dentry->d_inode) | |
553 | goto out; | |
554 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); | |
555 | if (rc) | |
556 | goto out; | |
557 | ecryptfs_copy_attr_timesizes(dir, lower_dir_dentry->d_inode); | |
558 | dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; | |
559 | out: | |
560 | unlock_dir(lower_dir_dentry); | |
561 | if (!dentry->d_inode) | |
562 | d_drop(dentry); | |
563 | return rc; | |
564 | } | |
565 | ||
566 | static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) | |
567 | { | |
568 | int rc = 0; | |
569 | struct dentry *tdentry = NULL; | |
570 | struct dentry *lower_dentry; | |
571 | struct dentry *tlower_dentry = NULL; | |
572 | struct dentry *lower_dir_dentry; | |
573 | ||
574 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
575 | if (!(tdentry = dget(dentry))) { | |
576 | rc = -EINVAL; | |
577 | ecryptfs_printk(KERN_ERR, "Error dget'ing dentry [%p]\n", | |
578 | dentry); | |
579 | goto out; | |
580 | } | |
581 | lower_dir_dentry = lock_parent(lower_dentry); | |
582 | if (!(tlower_dentry = dget(lower_dentry))) { | |
583 | rc = -EINVAL; | |
584 | ecryptfs_printk(KERN_ERR, "Error dget'ing lower_dentry " | |
585 | "[%p]\n", lower_dentry); | |
586 | goto out; | |
587 | } | |
588 | rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); | |
589 | if (!rc) { | |
590 | d_delete(tlower_dentry); | |
591 | tlower_dentry = NULL; | |
592 | } | |
593 | ecryptfs_copy_attr_times(dir, lower_dir_dentry->d_inode); | |
594 | dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; | |
595 | unlock_dir(lower_dir_dentry); | |
596 | if (!rc) | |
597 | d_drop(dentry); | |
598 | out: | |
599 | if (tdentry) | |
600 | dput(tdentry); | |
601 | if (tlower_dentry) | |
602 | dput(tlower_dentry); | |
603 | return rc; | |
604 | } | |
605 | ||
606 | static int | |
607 | ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) | |
608 | { | |
609 | int rc; | |
610 | struct dentry *lower_dentry; | |
611 | struct dentry *lower_dir_dentry; | |
612 | ||
613 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
614 | lower_dir_dentry = lock_parent(lower_dentry); | |
615 | rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); | |
616 | if (rc || !lower_dentry->d_inode) | |
617 | goto out; | |
618 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); | |
619 | if (rc) | |
620 | goto out; | |
621 | ecryptfs_copy_attr_timesizes(dir, lower_dir_dentry->d_inode); | |
622 | out: | |
623 | unlock_dir(lower_dir_dentry); | |
624 | if (!dentry->d_inode) | |
625 | d_drop(dentry); | |
626 | return rc; | |
627 | } | |
628 | ||
629 | static int | |
630 | ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
631 | struct inode *new_dir, struct dentry *new_dentry) | |
632 | { | |
633 | int rc; | |
634 | struct dentry *lower_old_dentry; | |
635 | struct dentry *lower_new_dentry; | |
636 | struct dentry *lower_old_dir_dentry; | |
637 | struct dentry *lower_new_dir_dentry; | |
638 | ||
639 | lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); | |
640 | lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); | |
641 | dget(lower_old_dentry); | |
642 | dget(lower_new_dentry); | |
643 | lower_old_dir_dentry = dget_parent(lower_old_dentry); | |
644 | lower_new_dir_dentry = dget_parent(lower_new_dentry); | |
645 | lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); | |
646 | rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, | |
647 | lower_new_dir_dentry->d_inode, lower_new_dentry); | |
648 | if (rc) | |
649 | goto out_lock; | |
650 | ecryptfs_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode); | |
651 | if (new_dir != old_dir) | |
652 | ecryptfs_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode); | |
653 | out_lock: | |
654 | unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); | |
655 | dput(lower_new_dentry); | |
656 | dput(lower_old_dentry); | |
657 | return rc; | |
658 | } | |
659 | ||
660 | static int | |
661 | ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz) | |
662 | { | |
663 | int rc; | |
664 | struct dentry *lower_dentry; | |
665 | char *decoded_name; | |
666 | char *lower_buf; | |
667 | mm_segment_t old_fs; | |
668 | struct ecryptfs_crypt_stat *crypt_stat; | |
669 | ||
670 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
671 | if (!lower_dentry->d_inode->i_op || | |
672 | !lower_dentry->d_inode->i_op->readlink) { | |
673 | rc = -EINVAL; | |
674 | goto out; | |
675 | } | |
676 | /* Released in this function */ | |
677 | lower_buf = kmalloc(bufsiz, GFP_KERNEL); | |
678 | if (lower_buf == NULL) { | |
679 | ecryptfs_printk(KERN_ERR, "Out of memory\n"); | |
680 | rc = -ENOMEM; | |
681 | goto out; | |
682 | } | |
683 | old_fs = get_fs(); | |
684 | set_fs(get_ds()); | |
685 | ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " | |
686 | "lower_dentry->d_name.name = [%s]\n", | |
687 | lower_dentry->d_name.name); | |
688 | rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, | |
689 | (char __user *)lower_buf, | |
690 | bufsiz); | |
691 | set_fs(old_fs); | |
692 | if (rc >= 0) { | |
693 | crypt_stat = NULL; | |
694 | rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc, | |
695 | &decoded_name); | |
696 | if (rc == -ENOMEM) | |
697 | goto out_free_lower_buf; | |
698 | if (rc > 0) { | |
699 | ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes " | |
700 | "to userspace: [%*s]\n", rc, | |
701 | decoded_name); | |
702 | if (copy_to_user(buf, decoded_name, rc)) | |
703 | rc = -EFAULT; | |
704 | } | |
705 | kfree(decoded_name); | |
706 | ecryptfs_copy_attr_atime(dentry->d_inode, | |
707 | lower_dentry->d_inode); | |
708 | } | |
709 | out_free_lower_buf: | |
710 | kfree(lower_buf); | |
711 | out: | |
712 | return rc; | |
713 | } | |
714 | ||
715 | static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
716 | { | |
717 | char *buf; | |
718 | int len = PAGE_SIZE, rc; | |
719 | mm_segment_t old_fs; | |
720 | ||
721 | /* Released in ecryptfs_put_link(); only release here on error */ | |
722 | buf = kmalloc(len, GFP_KERNEL); | |
723 | if (!buf) { | |
724 | rc = -ENOMEM; | |
725 | goto out; | |
726 | } | |
727 | old_fs = get_fs(); | |
728 | set_fs(get_ds()); | |
729 | ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " | |
730 | "dentry->d_name.name = [%s]\n", dentry->d_name.name); | |
731 | rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len); | |
732 | buf[rc] = '\0'; | |
733 | set_fs(old_fs); | |
734 | if (rc < 0) | |
735 | goto out_free; | |
736 | rc = 0; | |
737 | nd_set_link(nd, buf); | |
738 | goto out; | |
739 | out_free: | |
740 | kfree(buf); | |
741 | out: | |
742 | return ERR_PTR(rc); | |
743 | } | |
744 | ||
745 | static void | |
746 | ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) | |
747 | { | |
748 | /* Free the char* */ | |
749 | kfree(nd_get_link(nd)); | |
750 | } | |
751 | ||
752 | /** | |
753 | * upper_size_to_lower_size | |
754 | * @crypt_stat: Crypt_stat associated with file | |
755 | * @upper_size: Size of the upper file | |
756 | * | |
757 | * Calculate the requried size of the lower file based on the | |
758 | * specified size of the upper file. This calculation is based on the | |
759 | * number of headers in the underlying file and the extent size. | |
760 | * | |
761 | * Returns Calculated size of the lower file. | |
762 | */ | |
763 | static loff_t | |
764 | upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, | |
765 | loff_t upper_size) | |
766 | { | |
767 | loff_t lower_size; | |
768 | ||
769 | lower_size = ( crypt_stat->header_extent_size | |
770 | * crypt_stat->num_header_extents_at_front ); | |
771 | if (upper_size != 0) { | |
772 | loff_t num_extents; | |
773 | ||
774 | num_extents = upper_size >> crypt_stat->extent_shift; | |
775 | if (upper_size & ~crypt_stat->extent_mask) | |
776 | num_extents++; | |
777 | lower_size += (num_extents * crypt_stat->extent_size); | |
778 | } | |
779 | return lower_size; | |
780 | } | |
781 | ||
782 | /** | |
783 | * ecryptfs_truncate | |
784 | * @dentry: The ecryptfs layer dentry | |
785 | * @new_length: The length to expand the file to | |
786 | * | |
787 | * Function to handle truncations modifying the size of the file. Note | |
788 | * that the file sizes are interpolated. When expanding, we are simply | |
789 | * writing strings of 0's out. When truncating, we need to modify the | |
790 | * underlying file size according to the page index interpolations. | |
791 | * | |
792 | * Returns zero on success; non-zero otherwise | |
793 | */ | |
794 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) | |
795 | { | |
796 | int rc = 0; | |
797 | struct inode *inode = dentry->d_inode; | |
798 | struct dentry *lower_dentry; | |
799 | struct vfsmount *lower_mnt; | |
800 | struct file fake_ecryptfs_file, *lower_file = NULL; | |
801 | struct ecryptfs_crypt_stat *crypt_stat; | |
802 | loff_t i_size = i_size_read(inode); | |
803 | loff_t lower_size_before_truncate; | |
804 | loff_t lower_size_after_truncate; | |
805 | ||
806 | if (unlikely((new_length == i_size))) | |
807 | goto out; | |
808 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; | |
809 | /* Set up a fake ecryptfs file, this is used to interface with | |
810 | * the file in the underlying filesystem so that the | |
811 | * truncation has an effect there as well. */ | |
812 | memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file)); | |
813 | fake_ecryptfs_file.f_dentry = dentry; | |
814 | /* Released at out_free: label */ | |
815 | ecryptfs_set_file_private(&fake_ecryptfs_file, | |
816 | kmem_cache_alloc(ecryptfs_file_info_cache, | |
817 | SLAB_KERNEL)); | |
818 | if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) { | |
819 | rc = -ENOMEM; | |
820 | goto out; | |
821 | } | |
822 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
823 | /* This dget & mntget is released through fput at out_fput: */ | |
237fead6 | 824 | lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); |
7ff1d74f MH |
825 | if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt, |
826 | O_RDWR))) { | |
827 | ecryptfs_printk(KERN_ERR, | |
828 | "Error opening dentry; rc = [%i]\n", rc); | |
237fead6 MH |
829 | goto out_free; |
830 | } | |
831 | ecryptfs_set_file_lower(&fake_ecryptfs_file, lower_file); | |
832 | /* Switch on growing or shrinking file */ | |
833 | if (new_length > i_size) { | |
834 | rc = ecryptfs_fill_zeros(&fake_ecryptfs_file, new_length); | |
835 | if (rc) { | |
836 | ecryptfs_printk(KERN_ERR, | |
837 | "Problem with fill_zeros\n"); | |
838 | goto out_fput; | |
839 | } | |
840 | i_size_write(inode, new_length); | |
841 | rc = ecryptfs_write_inode_size_to_header(lower_file, | |
842 | lower_dentry->d_inode, | |
843 | inode); | |
844 | if (rc) { | |
845 | ecryptfs_printk(KERN_ERR, | |
846 | "Problem with ecryptfs_write" | |
847 | "_inode_size\n"); | |
848 | goto out_fput; | |
849 | } | |
850 | } else { /* new_length < i_size_read(inode) */ | |
851 | vmtruncate(inode, new_length); | |
852 | ecryptfs_write_inode_size_to_header(lower_file, | |
853 | lower_dentry->d_inode, | |
854 | inode); | |
855 | /* We are reducing the size of the ecryptfs file, and need to | |
856 | * know if we need to reduce the size of the lower file. */ | |
857 | lower_size_before_truncate = | |
858 | upper_size_to_lower_size(crypt_stat, i_size); | |
859 | lower_size_after_truncate = | |
860 | upper_size_to_lower_size(crypt_stat, new_length); | |
861 | if (lower_size_after_truncate < lower_size_before_truncate) | |
862 | vmtruncate(lower_dentry->d_inode, | |
863 | lower_size_after_truncate); | |
864 | } | |
865 | /* Update the access times */ | |
866 | lower_dentry->d_inode->i_mtime = lower_dentry->d_inode->i_ctime | |
867 | = CURRENT_TIME; | |
868 | mark_inode_dirty_sync(inode); | |
869 | out_fput: | |
7ff1d74f MH |
870 | if ((rc = ecryptfs_close_lower_file(lower_file))) |
871 | printk(KERN_ERR "Error closing lower_file\n"); | |
237fead6 MH |
872 | out_free: |
873 | if (ecryptfs_file_to_private(&fake_ecryptfs_file)) | |
874 | kmem_cache_free(ecryptfs_file_info_cache, | |
875 | ecryptfs_file_to_private(&fake_ecryptfs_file)); | |
876 | out: | |
877 | return rc; | |
878 | } | |
879 | ||
880 | static int | |
881 | ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd) | |
882 | { | |
883 | int rc; | |
884 | ||
885 | if (nd) { | |
886 | struct vfsmount *vfsmnt_save = nd->mnt; | |
887 | struct dentry *dentry_save = nd->dentry; | |
888 | ||
889 | nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry); | |
890 | nd->dentry = ecryptfs_dentry_to_lower(nd->dentry); | |
891 | rc = permission(ecryptfs_inode_to_lower(inode), mask, nd); | |
892 | nd->mnt = vfsmnt_save; | |
893 | nd->dentry = dentry_save; | |
894 | } else | |
895 | rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL); | |
896 | return rc; | |
897 | } | |
898 | ||
899 | /** | |
900 | * ecryptfs_setattr | |
901 | * @dentry: dentry handle to the inode to modify | |
902 | * @ia: Structure with flags of what to change and values | |
903 | * | |
904 | * Updates the metadata of an inode. If the update is to the size | |
905 | * i.e. truncation, then ecryptfs_truncate will handle the size modification | |
906 | * of both the ecryptfs inode and the lower inode. | |
907 | * | |
908 | * All other metadata changes will be passed right to the lower filesystem, | |
909 | * and we will just update our inode to look like the lower. | |
910 | */ | |
911 | static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) | |
912 | { | |
913 | int rc = 0; | |
914 | struct dentry *lower_dentry; | |
915 | struct inode *inode; | |
916 | struct inode *lower_inode; | |
917 | struct ecryptfs_crypt_stat *crypt_stat; | |
918 | ||
919 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; | |
920 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
921 | inode = dentry->d_inode; | |
922 | lower_inode = ecryptfs_inode_to_lower(inode); | |
923 | if (ia->ia_valid & ATTR_SIZE) { | |
924 | ecryptfs_printk(KERN_DEBUG, | |
925 | "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n", | |
926 | ia->ia_valid, ATTR_SIZE); | |
927 | rc = ecryptfs_truncate(dentry, ia->ia_size); | |
928 | /* ecryptfs_truncate handles resizing of the lower file */ | |
929 | ia->ia_valid &= ~ATTR_SIZE; | |
930 | ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n", | |
931 | ia->ia_valid); | |
932 | if (rc < 0) | |
933 | goto out; | |
934 | } | |
935 | rc = notify_change(lower_dentry, ia); | |
936 | out: | |
937 | ecryptfs_copy_attr_all(inode, lower_inode); | |
938 | return rc; | |
939 | } | |
940 | ||
941 | static int | |
942 | ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, | |
943 | size_t size, int flags) | |
944 | { | |
945 | int rc = 0; | |
946 | struct dentry *lower_dentry; | |
947 | ||
948 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
949 | if (!lower_dentry->d_inode->i_op->setxattr) { | |
950 | rc = -ENOSYS; | |
951 | goto out; | |
952 | } | |
953 | mutex_lock(&lower_dentry->d_inode->i_mutex); | |
954 | rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, | |
955 | size, flags); | |
956 | mutex_unlock(&lower_dentry->d_inode->i_mutex); | |
957 | out: | |
958 | return rc; | |
959 | } | |
960 | ||
961 | static ssize_t | |
962 | ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, | |
963 | size_t size) | |
964 | { | |
965 | int rc = 0; | |
966 | struct dentry *lower_dentry; | |
967 | ||
968 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
969 | if (!lower_dentry->d_inode->i_op->getxattr) { | |
970 | rc = -ENOSYS; | |
971 | goto out; | |
972 | } | |
973 | mutex_lock(&lower_dentry->d_inode->i_mutex); | |
974 | rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, | |
975 | size); | |
976 | mutex_unlock(&lower_dentry->d_inode->i_mutex); | |
977 | out: | |
978 | return rc; | |
979 | } | |
980 | ||
981 | static ssize_t | |
982 | ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) | |
983 | { | |
984 | int rc = 0; | |
985 | struct dentry *lower_dentry; | |
986 | ||
987 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
988 | if (!lower_dentry->d_inode->i_op->listxattr) { | |
989 | rc = -ENOSYS; | |
990 | goto out; | |
991 | } | |
992 | mutex_lock(&lower_dentry->d_inode->i_mutex); | |
993 | rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size); | |
994 | mutex_unlock(&lower_dentry->d_inode->i_mutex); | |
995 | out: | |
996 | return rc; | |
997 | } | |
998 | ||
999 | static int ecryptfs_removexattr(struct dentry *dentry, const char *name) | |
1000 | { | |
1001 | int rc = 0; | |
1002 | struct dentry *lower_dentry; | |
1003 | ||
1004 | lower_dentry = ecryptfs_dentry_to_lower(dentry); | |
1005 | if (!lower_dentry->d_inode->i_op->removexattr) { | |
1006 | rc = -ENOSYS; | |
1007 | goto out; | |
1008 | } | |
1009 | mutex_lock(&lower_dentry->d_inode->i_mutex); | |
1010 | rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); | |
1011 | mutex_unlock(&lower_dentry->d_inode->i_mutex); | |
1012 | out: | |
1013 | return rc; | |
1014 | } | |
1015 | ||
1016 | int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode) | |
1017 | { | |
1018 | if ((ecryptfs_inode_to_lower(inode) | |
1019 | == (struct inode *)candidate_lower_inode)) | |
1020 | return 1; | |
1021 | else | |
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | int ecryptfs_inode_set(struct inode *inode, void *lower_inode) | |
1026 | { | |
1027 | ecryptfs_init_inode(inode, (struct inode *)lower_inode); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | struct inode_operations ecryptfs_symlink_iops = { | |
1032 | .readlink = ecryptfs_readlink, | |
1033 | .follow_link = ecryptfs_follow_link, | |
1034 | .put_link = ecryptfs_put_link, | |
1035 | .permission = ecryptfs_permission, | |
1036 | .setattr = ecryptfs_setattr, | |
1037 | .setxattr = ecryptfs_setxattr, | |
1038 | .getxattr = ecryptfs_getxattr, | |
1039 | .listxattr = ecryptfs_listxattr, | |
1040 | .removexattr = ecryptfs_removexattr | |
1041 | }; | |
1042 | ||
1043 | struct inode_operations ecryptfs_dir_iops = { | |
1044 | .create = ecryptfs_create, | |
1045 | .lookup = ecryptfs_lookup, | |
1046 | .link = ecryptfs_link, | |
1047 | .unlink = ecryptfs_unlink, | |
1048 | .symlink = ecryptfs_symlink, | |
1049 | .mkdir = ecryptfs_mkdir, | |
1050 | .rmdir = ecryptfs_rmdir, | |
1051 | .mknod = ecryptfs_mknod, | |
1052 | .rename = ecryptfs_rename, | |
1053 | .permission = ecryptfs_permission, | |
1054 | .setattr = ecryptfs_setattr, | |
1055 | .setxattr = ecryptfs_setxattr, | |
1056 | .getxattr = ecryptfs_getxattr, | |
1057 | .listxattr = ecryptfs_listxattr, | |
1058 | .removexattr = ecryptfs_removexattr | |
1059 | }; | |
1060 | ||
1061 | struct inode_operations ecryptfs_main_iops = { | |
1062 | .permission = ecryptfs_permission, | |
1063 | .setattr = ecryptfs_setattr, | |
1064 | .setxattr = ecryptfs_setxattr, | |
1065 | .getxattr = ecryptfs_getxattr, | |
1066 | .listxattr = ecryptfs_listxattr, | |
1067 | .removexattr = ecryptfs_removexattr | |
1068 | }; |