blob: 9fa7e0b27a96ee57ae08187e17b6872b79d39fd4 [file] [log] [blame]
Michael Halcrow237fead2006-10-04 02:16:22 -07001/**
2 * eCryptfs: Linux filesystem encryption layer
3 *
4 * Copyright (C) 1997-2004 Erez Zadok
5 * Copyright (C) 2001-2004 Stony Brook University
Michael Halcrowdd2a3b72007-02-12 00:53:46 -08006 * Copyright (C) 2004-2007 International Business Machines Corp.
Michael Halcrow237fead2006-10-04 02:16:22 -07007 * 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>
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -080033#include <linux/fs_stack.h>
Michael Halcrow237fead2006-10-04 02:16:22 -070034#include "ecryptfs_kernel.h"
35
36static struct dentry *lock_parent(struct dentry *dentry)
37{
38 struct dentry *dir;
39
40 dir = dget(dentry->d_parent);
41 mutex_lock(&(dir->d_inode->i_mutex));
42 return dir;
43}
44
45static void unlock_parent(struct dentry *dentry)
46{
47 mutex_unlock(&(dentry->d_parent->d_inode->i_mutex));
48 dput(dentry->d_parent);
49}
50
51static void unlock_dir(struct dentry *dir)
52{
53 mutex_unlock(&dir->d_inode->i_mutex);
54 dput(dir);
55}
56
Michael Halcrow237fead2006-10-04 02:16:22 -070057/**
58 * ecryptfs_create_underlying_file
59 * @lower_dir_inode: inode of the parent in the lower fs of the new file
60 * @lower_dentry: New file's dentry in the lower fs
61 * @ecryptfs_dentry: New file's dentry in ecryptfs
62 * @mode: The mode of the new file
63 * @nd: nameidata of ecryptfs' parent's dentry & vfsmount
64 *
65 * Creates the file in the lower file system.
66 *
67 * Returns zero on success; non-zero on error condition
68 */
69static int
70ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
71 struct dentry *dentry, int mode,
72 struct nameidata *nd)
73{
74 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
75 struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
76 struct dentry *dentry_save;
77 struct vfsmount *vfsmount_save;
78 int rc;
79
80 dentry_save = nd->dentry;
81 vfsmount_save = nd->mnt;
82 nd->dentry = lower_dentry;
83 nd->mnt = lower_mnt;
84 rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
85 nd->dentry = dentry_save;
86 nd->mnt = vfsmount_save;
87 return rc;
88}
89
90/**
91 * ecryptfs_do_create
92 * @directory_inode: inode of the new file's dentry's parent in ecryptfs
93 * @ecryptfs_dentry: New file's dentry in ecryptfs
94 * @mode: The mode of the new file
95 * @nd: nameidata of ecryptfs' parent's dentry & vfsmount
96 *
97 * Creates the underlying file and the eCryptfs inode which will link to
98 * it. It will also update the eCryptfs directory inode to mimic the
99 * stat of the lower directory inode.
100 *
101 * Returns zero on success; non-zero on error condition
102 */
103static int
104ecryptfs_do_create(struct inode *directory_inode,
105 struct dentry *ecryptfs_dentry, int mode,
106 struct nameidata *nd)
107{
108 int rc;
109 struct dentry *lower_dentry;
110 struct dentry *lower_dir_dentry;
111
112 lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
113 lower_dir_dentry = lock_parent(lower_dentry);
114 if (unlikely(IS_ERR(lower_dir_dentry))) {
115 ecryptfs_printk(KERN_ERR, "Error locking directory of "
116 "dentry\n");
117 rc = PTR_ERR(lower_dir_dentry);
118 goto out;
119 }
120 rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode,
121 ecryptfs_dentry, mode, nd);
122 if (unlikely(rc)) {
123 ecryptfs_printk(KERN_ERR,
124 "Failure to create underlying file\n");
125 goto out_lock;
126 }
127 rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry,
128 directory_inode->i_sb, 0);
129 if (rc) {
130 ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n");
131 goto out_lock;
132 }
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800133 fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode);
134 fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700135out_lock:
136 unlock_dir(lower_dir_dentry);
137out:
138 return rc;
139}
140
141/**
142 * grow_file
143 * @ecryptfs_dentry: the ecryptfs dentry
144 * @lower_file: The lower file
145 * @inode: The ecryptfs inode
146 * @lower_inode: The lower inode
147 *
148 * This is the code which will grow the file to its correct size.
149 */
150static int grow_file(struct dentry *ecryptfs_dentry, struct file *lower_file,
151 struct inode *inode, struct inode *lower_inode)
152{
153 int rc = 0;
154 struct file fake_file;
155 struct ecryptfs_file_info tmp_file_info;
156
157 memset(&fake_file, 0, sizeof(fake_file));
Josef "Jeff" Sipekbd243a42006-12-08 02:36:48 -0800158 fake_file.f_path.dentry = ecryptfs_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700159 memset(&tmp_file_info, 0, sizeof(tmp_file_info));
160 ecryptfs_set_file_private(&fake_file, &tmp_file_info);
161 ecryptfs_set_file_lower(&fake_file, lower_file);
162 rc = ecryptfs_fill_zeros(&fake_file, 1);
163 if (rc) {
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800164 ecryptfs_inode_to_private(inode)->crypt_stat.flags |=
165 ECRYPTFS_SECURITY_WARNING;
Michael Halcrow237fead2006-10-04 02:16:22 -0700166 ecryptfs_printk(KERN_WARNING, "Error attempting to fill zeros "
167 "in file; rc = [%d]\n", rc);
168 goto out;
169 }
170 i_size_write(inode, 0);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800171 ecryptfs_write_inode_size_to_metadata(lower_file, lower_inode, inode,
172 ecryptfs_dentry,
173 ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800174 ecryptfs_inode_to_private(inode)->crypt_stat.flags |= ECRYPTFS_NEW_FILE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700175out:
176 return rc;
177}
178
179/**
180 * ecryptfs_initialize_file
181 *
182 * Cause the file to be changed from a basic empty file to an ecryptfs
183 * file with a header and first data page.
184 *
185 * Returns zero on success
186 */
187static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry)
188{
189 int rc = 0;
190 int lower_flags;
191 struct ecryptfs_crypt_stat *crypt_stat;
192 struct dentry *lower_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700193 struct file *lower_file;
194 struct inode *inode, *lower_inode;
195 struct vfsmount *lower_mnt;
196
197 lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
198 ecryptfs_printk(KERN_DEBUG, "lower_dentry->d_name.name = [%s]\n",
199 lower_dentry->d_name.name);
200 inode = ecryptfs_dentry->d_inode;
201 crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
Michael Halcrow70456602007-02-12 00:53:48 -0800202 lower_flags = ((O_CREAT | O_TRUNC) & O_ACCMODE) | O_RDWR;
Michael Halcrow237fead2006-10-04 02:16:22 -0700203#if BITS_PER_LONG != 32
204 lower_flags |= O_LARGEFILE;
205#endif
206 lower_mnt = ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700207 /* Corresponding fput() at end of this function */
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800208 if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
209 lower_flags))) {
Michael Halcrow237fead2006-10-04 02:16:22 -0700210 ecryptfs_printk(KERN_ERR,
211 "Error opening dentry; rc = [%i]\n", rc);
212 goto out;
213 }
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800214 lower_inode = lower_dentry->d_inode;
Michael Halcrow237fead2006-10-04 02:16:22 -0700215 if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
216 ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800217 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
Michael Halcrow237fead2006-10-04 02:16:22 -0700218 goto out_fput;
219 }
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800220 crypt_stat->flags |= ECRYPTFS_NEW_FILE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700221 ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n");
222 rc = ecryptfs_new_file_context(ecryptfs_dentry);
223 if (rc) {
224 ecryptfs_printk(KERN_DEBUG, "Error creating new file "
225 "context\n");
226 goto out_fput;
227 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800228 rc = ecryptfs_write_metadata(ecryptfs_dentry, lower_file);
Michael Halcrow237fead2006-10-04 02:16:22 -0700229 if (rc) {
230 ecryptfs_printk(KERN_DEBUG, "Error writing headers\n");
231 goto out_fput;
232 }
233 rc = grow_file(ecryptfs_dentry, lower_file, inode, lower_inode);
234out_fput:
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800235 if ((rc = ecryptfs_close_lower_file(lower_file)))
236 printk(KERN_ERR "Error closing lower_file\n");
Michael Halcrow237fead2006-10-04 02:16:22 -0700237out:
238 return rc;
239}
240
241/**
242 * ecryptfs_create
243 * @dir: The inode of the directory in which to create the file.
244 * @dentry: The eCryptfs dentry
245 * @mode: The mode of the new file.
246 * @nd: nameidata
247 *
248 * Creates a new file.
249 *
250 * Returns zero on success; non-zero on error condition
251 */
252static int
253ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
254 int mode, struct nameidata *nd)
255{
256 int rc;
257
258 rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd);
259 if (unlikely(rc)) {
260 ecryptfs_printk(KERN_WARNING, "Failed to create file in"
261 "lower filesystem\n");
262 goto out;
263 }
264 /* At this point, a file exists on "disk"; we need to make sure
265 * that this on disk file is prepared to be an ecryptfs file */
266 rc = ecryptfs_initialize_file(ecryptfs_dentry);
267out:
268 return rc;
269}
270
271/**
272 * ecryptfs_lookup
273 * @dir: inode
274 * @dentry: The dentry
275 * @nd: nameidata, may be NULL
276 *
277 * Find a file on disk. If the file does not exist, then we'll add it to the
278 * dentry cache and continue on to read it from the disk.
279 */
280static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
281 struct nameidata *nd)
282{
283 int rc = 0;
284 struct dentry *lower_dir_dentry;
285 struct dentry *lower_dentry;
286 struct vfsmount *lower_mnt;
Michael Halcrow237fead2006-10-04 02:16:22 -0700287 char *encoded_name;
288 unsigned int encoded_namelen;
289 struct ecryptfs_crypt_stat *crypt_stat = NULL;
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800290 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
Michael Halcrow237fead2006-10-04 02:16:22 -0700291 char *page_virt = NULL;
292 struct inode *lower_inode;
293 u64 file_size;
294
295 lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent);
296 dentry->d_op = &ecryptfs_dops;
297 if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, "."))
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800298 || (dentry->d_name.len == 2
299 && !strcmp(dentry->d_name.name, ".."))) {
300 d_drop(dentry);
301 goto out;
302 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700303 encoded_namelen = ecryptfs_encode_filename(crypt_stat,
304 dentry->d_name.name,
305 dentry->d_name.len,
306 &encoded_name);
307 if (encoded_namelen < 0) {
308 rc = encoded_namelen;
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800309 d_drop(dentry);
310 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700311 }
312 ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen "
313 "= [%d]\n", encoded_name, encoded_namelen);
314 lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry,
315 encoded_namelen - 1);
316 kfree(encoded_name);
Michael Halcrow237fead2006-10-04 02:16:22 -0700317 if (IS_ERR(lower_dentry)) {
318 ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n");
319 rc = PTR_ERR(lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800320 d_drop(dentry);
321 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700322 }
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800323 lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
Michael Halcrow237fead2006-10-04 02:16:22 -0700324 ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->"
325 "d_name.name = [%s]\n", lower_dentry,
326 lower_dentry->d_name.name);
327 lower_inode = lower_dentry->d_inode;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800328 fsstack_copy_attr_atime(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700329 BUG_ON(!atomic_read(&lower_dentry->d_count));
330 ecryptfs_set_dentry_private(dentry,
331 kmem_cache_alloc(ecryptfs_dentry_info_cache,
Christoph Lametere94b1762006-12-06 20:33:17 -0800332 GFP_KERNEL));
Michael Halcrow237fead2006-10-04 02:16:22 -0700333 if (!ecryptfs_dentry_to_private(dentry)) {
334 rc = -ENOMEM;
335 ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting "
336 "to allocate ecryptfs_dentry_info struct\n");
337 goto out_dput;
338 }
339 ecryptfs_set_dentry_lower(dentry, lower_dentry);
340 ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt);
341 if (!lower_dentry->d_inode) {
342 /* We want to add because we couldn't find in lower */
343 d_add(dentry, NULL);
344 goto out;
345 }
346 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1);
347 if (rc) {
348 ecryptfs_printk(KERN_ERR, "Error interposing\n");
349 goto out_dput;
350 }
351 if (S_ISDIR(lower_inode->i_mode)) {
352 ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n");
353 goto out;
354 }
355 if (S_ISLNK(lower_inode->i_mode)) {
356 ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n");
357 goto out;
358 }
359 if (!nd) {
360 ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave"
361 "as we *think* we are about to unlink\n");
362 goto out;
363 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700364 /* Released in this function */
Robert P. J. Dayc3762222007-02-10 01:45:03 -0800365 page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2,
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800366 GFP_USER);
Michael Halcrow237fead2006-10-04 02:16:22 -0700367 if (!page_virt) {
368 rc = -ENOMEM;
369 ecryptfs_printk(KERN_ERR,
370 "Cannot ecryptfs_kmalloc a page\n");
371 goto out_dput;
372 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700373 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800374 if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
Michael Halcrow237fead2006-10-04 02:16:22 -0700375 ecryptfs_set_default_sizes(crypt_stat);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800376 rc = ecryptfs_read_and_validate_header_region(page_virt, lower_dentry,
377 nd->mnt);
Michael Halcrow237fead2006-10-04 02:16:22 -0700378 if (rc) {
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800379 rc = ecryptfs_read_and_validate_xattr_region(page_virt, dentry);
380 if (rc) {
381 printk(KERN_DEBUG "Valid metadata not found in header "
382 "region or xattr region; treating file as "
383 "unencrypted\n");
384 rc = 0;
Michael Halcrow237fead2006-10-04 02:16:22 -0700385 kmem_cache_free(ecryptfs_header_cache_2, page_virt);
386 goto out;
387 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800388 crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR;
Michael Halcrow237fead2006-10-04 02:16:22 -0700389 }
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800390 mount_crypt_stat = &ecryptfs_superblock_to_private(
391 dentry->d_sb)->mount_crypt_stat;
392 if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) {
393 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
394 file_size = (crypt_stat->header_extent_size
395 + i_size_read(lower_dentry->d_inode));
396 else
397 file_size = i_size_read(lower_dentry->d_inode);
398 } else {
399 memcpy(&file_size, page_virt, sizeof(file_size));
400 file_size = be64_to_cpu(file_size);
401 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800402 i_size_write(dentry->d_inode, (loff_t)file_size);
Michael Halcrow237fead2006-10-04 02:16:22 -0700403 kmem_cache_free(ecryptfs_header_cache_2, page_virt);
404 goto out;
405
406out_dput:
407 dput(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700408 d_drop(dentry);
409out:
410 return ERR_PTR(rc);
411}
412
413static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,
414 struct dentry *new_dentry)
415{
416 struct dentry *lower_old_dentry;
417 struct dentry *lower_new_dentry;
418 struct dentry *lower_dir_dentry;
419 u64 file_size_save;
420 int rc;
421
422 file_size_save = i_size_read(old_dentry->d_inode);
423 lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
424 lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
425 dget(lower_old_dentry);
426 dget(lower_new_dentry);
427 lower_dir_dentry = lock_parent(lower_new_dentry);
428 rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
429 lower_new_dentry);
430 if (rc || !lower_new_dentry->d_inode)
431 goto out_lock;
432 rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0);
433 if (rc)
434 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800435 fsstack_copy_attr_times(dir, lower_new_dentry->d_inode);
436 fsstack_copy_inode_size(dir, lower_new_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700437 old_dentry->d_inode->i_nlink =
438 ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink;
439 i_size_write(new_dentry->d_inode, file_size_save);
440out_lock:
441 unlock_dir(lower_dir_dentry);
442 dput(lower_new_dentry);
443 dput(lower_old_dentry);
Michael Halcrowae56fb12006-11-16 01:19:30 -0800444 d_drop(lower_old_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800445 d_drop(new_dentry);
446 d_drop(old_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700447 return rc;
448}
449
450static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)
451{
452 int rc = 0;
453 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
454 struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
455
456 lock_parent(lower_dentry);
457 rc = vfs_unlink(lower_dir_inode, lower_dentry);
458 if (rc) {
Michael Halcrowae56fb12006-11-16 01:19:30 -0800459 printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700460 goto out_unlock;
461 }
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800462 fsstack_copy_attr_times(dir, lower_dir_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700463 dentry->d_inode->i_nlink =
464 ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink;
465 dentry->d_inode->i_ctime = dir->i_ctime;
466out_unlock:
467 unlock_parent(lower_dentry);
468 return rc;
469}
470
471static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
472 const char *symname)
473{
474 int rc;
475 struct dentry *lower_dentry;
476 struct dentry *lower_dir_dentry;
477 umode_t mode;
478 char *encoded_symname;
479 unsigned int encoded_symlen;
480 struct ecryptfs_crypt_stat *crypt_stat = NULL;
481
482 lower_dentry = ecryptfs_dentry_to_lower(dentry);
483 dget(lower_dentry);
484 lower_dir_dentry = lock_parent(lower_dentry);
485 mode = S_IALLUGO;
486 encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname,
487 strlen(symname),
488 &encoded_symname);
489 if (encoded_symlen < 0) {
490 rc = encoded_symlen;
491 goto out_lock;
492 }
493 rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
494 encoded_symname, mode);
495 kfree(encoded_symname);
496 if (rc || !lower_dentry->d_inode)
497 goto out_lock;
498 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
499 if (rc)
500 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800501 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
502 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700503out_lock:
504 unlock_dir(lower_dir_dentry);
505 dput(lower_dentry);
506 if (!dentry->d_inode)
507 d_drop(dentry);
508 return rc;
509}
510
511static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
512{
513 int rc;
514 struct dentry *lower_dentry;
515 struct dentry *lower_dir_dentry;
516
517 lower_dentry = ecryptfs_dentry_to_lower(dentry);
518 lower_dir_dentry = lock_parent(lower_dentry);
519 rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode);
520 if (rc || !lower_dentry->d_inode)
521 goto out;
522 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
523 if (rc)
524 goto out;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800525 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
526 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700527 dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
528out:
529 unlock_dir(lower_dir_dentry);
530 if (!dentry->d_inode)
531 d_drop(dentry);
532 return rc;
533}
534
535static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
536{
Michael Halcrow237fead2006-10-04 02:16:22 -0700537 struct dentry *lower_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700538 struct dentry *lower_dir_dentry;
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800539 int rc;
Michael Halcrow237fead2006-10-04 02:16:22 -0700540
541 lower_dentry = ecryptfs_dentry_to_lower(dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800542 dget(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700543 lower_dir_dentry = lock_parent(lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800544 dget(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700545 rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800546 dput(lower_dentry);
547 if (!rc)
548 d_delete(lower_dentry);
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800549 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700550 dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
551 unlock_dir(lower_dir_dentry);
552 if (!rc)
553 d_drop(dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800554 dput(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700555 return rc;
556}
557
558static int
559ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
560{
561 int rc;
562 struct dentry *lower_dentry;
563 struct dentry *lower_dir_dentry;
564
565 lower_dentry = ecryptfs_dentry_to_lower(dentry);
566 lower_dir_dentry = lock_parent(lower_dentry);
567 rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev);
568 if (rc || !lower_dentry->d_inode)
569 goto out;
570 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
571 if (rc)
572 goto out;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800573 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
574 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700575out:
576 unlock_dir(lower_dir_dentry);
577 if (!dentry->d_inode)
578 d_drop(dentry);
579 return rc;
580}
581
582static int
583ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
584 struct inode *new_dir, struct dentry *new_dentry)
585{
586 int rc;
587 struct dentry *lower_old_dentry;
588 struct dentry *lower_new_dentry;
589 struct dentry *lower_old_dir_dentry;
590 struct dentry *lower_new_dir_dentry;
591
592 lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
593 lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
594 dget(lower_old_dentry);
595 dget(lower_new_dentry);
596 lower_old_dir_dentry = dget_parent(lower_old_dentry);
597 lower_new_dir_dentry = dget_parent(lower_new_dentry);
598 lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
599 rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry,
600 lower_new_dir_dentry->d_inode, lower_new_dentry);
601 if (rc)
602 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800603 fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700604 if (new_dir != old_dir)
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800605 fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700606out_lock:
607 unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
Michael Halcrowa9083082006-11-16 01:19:16 -0800608 dput(lower_new_dentry->d_parent);
609 dput(lower_old_dentry->d_parent);
Michael Halcrow237fead2006-10-04 02:16:22 -0700610 dput(lower_new_dentry);
611 dput(lower_old_dentry);
612 return rc;
613}
614
615static int
616ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz)
617{
618 int rc;
619 struct dentry *lower_dentry;
620 char *decoded_name;
621 char *lower_buf;
622 mm_segment_t old_fs;
623 struct ecryptfs_crypt_stat *crypt_stat;
624
625 lower_dentry = ecryptfs_dentry_to_lower(dentry);
626 if (!lower_dentry->d_inode->i_op ||
627 !lower_dentry->d_inode->i_op->readlink) {
628 rc = -EINVAL;
629 goto out;
630 }
631 /* Released in this function */
632 lower_buf = kmalloc(bufsiz, GFP_KERNEL);
633 if (lower_buf == NULL) {
634 ecryptfs_printk(KERN_ERR, "Out of memory\n");
635 rc = -ENOMEM;
636 goto out;
637 }
638 old_fs = get_fs();
639 set_fs(get_ds());
640 ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ "
641 "lower_dentry->d_name.name = [%s]\n",
642 lower_dentry->d_name.name);
643 rc = lower_dentry->d_inode->i_op->readlink(lower_dentry,
644 (char __user *)lower_buf,
645 bufsiz);
646 set_fs(old_fs);
647 if (rc >= 0) {
648 crypt_stat = NULL;
649 rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc,
650 &decoded_name);
651 if (rc == -ENOMEM)
652 goto out_free_lower_buf;
653 if (rc > 0) {
654 ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes "
655 "to userspace: [%*s]\n", rc,
656 decoded_name);
657 if (copy_to_user(buf, decoded_name, rc))
658 rc = -EFAULT;
659 }
660 kfree(decoded_name);
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800661 fsstack_copy_attr_atime(dentry->d_inode,
662 lower_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700663 }
664out_free_lower_buf:
665 kfree(lower_buf);
666out:
667 return rc;
668}
669
670static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd)
671{
672 char *buf;
673 int len = PAGE_SIZE, rc;
674 mm_segment_t old_fs;
675
676 /* Released in ecryptfs_put_link(); only release here on error */
677 buf = kmalloc(len, GFP_KERNEL);
678 if (!buf) {
679 rc = -ENOMEM;
680 goto out;
681 }
682 old_fs = get_fs();
683 set_fs(get_ds());
684 ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ "
685 "dentry->d_name.name = [%s]\n", dentry->d_name.name);
686 rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len);
687 buf[rc] = '\0';
688 set_fs(old_fs);
689 if (rc < 0)
690 goto out_free;
691 rc = 0;
692 nd_set_link(nd, buf);
693 goto out;
694out_free:
695 kfree(buf);
696out:
697 return ERR_PTR(rc);
698}
699
700static void
701ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
702{
703 /* Free the char* */
704 kfree(nd_get_link(nd));
705}
706
707/**
708 * upper_size_to_lower_size
709 * @crypt_stat: Crypt_stat associated with file
710 * @upper_size: Size of the upper file
711 *
712 * Calculate the requried size of the lower file based on the
713 * specified size of the upper file. This calculation is based on the
714 * number of headers in the underlying file and the extent size.
715 *
716 * Returns Calculated size of the lower file.
717 */
718static loff_t
719upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat,
720 loff_t upper_size)
721{
722 loff_t lower_size;
723
724 lower_size = ( crypt_stat->header_extent_size
725 * crypt_stat->num_header_extents_at_front );
726 if (upper_size != 0) {
727 loff_t num_extents;
728
729 num_extents = upper_size >> crypt_stat->extent_shift;
730 if (upper_size & ~crypt_stat->extent_mask)
731 num_extents++;
732 lower_size += (num_extents * crypt_stat->extent_size);
733 }
734 return lower_size;
735}
736
737/**
738 * ecryptfs_truncate
739 * @dentry: The ecryptfs layer dentry
740 * @new_length: The length to expand the file to
741 *
742 * Function to handle truncations modifying the size of the file. Note
743 * that the file sizes are interpolated. When expanding, we are simply
744 * writing strings of 0's out. When truncating, we need to modify the
745 * underlying file size according to the page index interpolations.
746 *
747 * Returns zero on success; non-zero otherwise
748 */
749int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
750{
751 int rc = 0;
752 struct inode *inode = dentry->d_inode;
753 struct dentry *lower_dentry;
754 struct vfsmount *lower_mnt;
755 struct file fake_ecryptfs_file, *lower_file = NULL;
756 struct ecryptfs_crypt_stat *crypt_stat;
757 loff_t i_size = i_size_read(inode);
758 loff_t lower_size_before_truncate;
759 loff_t lower_size_after_truncate;
760
761 if (unlikely((new_length == i_size)))
762 goto out;
763 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
764 /* Set up a fake ecryptfs file, this is used to interface with
765 * the file in the underlying filesystem so that the
766 * truncation has an effect there as well. */
767 memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file));
Josef "Jeff" Sipekbd243a42006-12-08 02:36:48 -0800768 fake_ecryptfs_file.f_path.dentry = dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700769 /* Released at out_free: label */
770 ecryptfs_set_file_private(&fake_ecryptfs_file,
771 kmem_cache_alloc(ecryptfs_file_info_cache,
Christoph Lametere94b1762006-12-06 20:33:17 -0800772 GFP_KERNEL));
Michael Halcrow237fead2006-10-04 02:16:22 -0700773 if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) {
774 rc = -ENOMEM;
775 goto out;
776 }
777 lower_dentry = ecryptfs_dentry_to_lower(dentry);
778 /* This dget & mntget is released through fput at out_fput: */
Michael Halcrow237fead2006-10-04 02:16:22 -0700779 lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800780 if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
781 O_RDWR))) {
782 ecryptfs_printk(KERN_ERR,
783 "Error opening dentry; rc = [%i]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700784 goto out_free;
785 }
786 ecryptfs_set_file_lower(&fake_ecryptfs_file, lower_file);
787 /* Switch on growing or shrinking file */
788 if (new_length > i_size) {
789 rc = ecryptfs_fill_zeros(&fake_ecryptfs_file, new_length);
790 if (rc) {
791 ecryptfs_printk(KERN_ERR,
792 "Problem with fill_zeros\n");
793 goto out_fput;
794 }
795 i_size_write(inode, new_length);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800796 rc = ecryptfs_write_inode_size_to_metadata(
797 lower_file, lower_dentry->d_inode, inode, dentry,
798 ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
Michael Halcrow237fead2006-10-04 02:16:22 -0700799 if (rc) {
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800800 printk(KERN_ERR "Problem with "
801 "ecryptfs_write_inode_size_to_metadata; "
802 "rc = [%d]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700803 goto out_fput;
804 }
805 } else { /* new_length < i_size_read(inode) */
806 vmtruncate(inode, new_length);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800807 rc = ecryptfs_write_inode_size_to_metadata(
808 lower_file, lower_dentry->d_inode, inode, dentry,
809 ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
810 if (rc) {
811 printk(KERN_ERR "Problem with "
812 "ecryptfs_write_inode_size_to_metadata; "
813 "rc = [%d]\n", rc);
814 goto out_fput;
815 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700816 /* We are reducing the size of the ecryptfs file, and need to
817 * know if we need to reduce the size of the lower file. */
818 lower_size_before_truncate =
819 upper_size_to_lower_size(crypt_stat, i_size);
820 lower_size_after_truncate =
821 upper_size_to_lower_size(crypt_stat, new_length);
822 if (lower_size_after_truncate < lower_size_before_truncate)
823 vmtruncate(lower_dentry->d_inode,
824 lower_size_after_truncate);
825 }
826 /* Update the access times */
827 lower_dentry->d_inode->i_mtime = lower_dentry->d_inode->i_ctime
828 = CURRENT_TIME;
829 mark_inode_dirty_sync(inode);
830out_fput:
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800831 if ((rc = ecryptfs_close_lower_file(lower_file)))
832 printk(KERN_ERR "Error closing lower_file\n");
Michael Halcrow237fead2006-10-04 02:16:22 -0700833out_free:
834 if (ecryptfs_file_to_private(&fake_ecryptfs_file))
835 kmem_cache_free(ecryptfs_file_info_cache,
836 ecryptfs_file_to_private(&fake_ecryptfs_file));
837out:
838 return rc;
839}
840
841static int
842ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
843{
844 int rc;
845
846 if (nd) {
847 struct vfsmount *vfsmnt_save = nd->mnt;
848 struct dentry *dentry_save = nd->dentry;
849
850 nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry);
851 nd->dentry = ecryptfs_dentry_to_lower(nd->dentry);
852 rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
853 nd->mnt = vfsmnt_save;
854 nd->dentry = dentry_save;
855 } else
856 rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
857 return rc;
858}
859
860/**
861 * ecryptfs_setattr
862 * @dentry: dentry handle to the inode to modify
863 * @ia: Structure with flags of what to change and values
864 *
865 * Updates the metadata of an inode. If the update is to the size
866 * i.e. truncation, then ecryptfs_truncate will handle the size modification
867 * of both the ecryptfs inode and the lower inode.
868 *
869 * All other metadata changes will be passed right to the lower filesystem,
870 * and we will just update our inode to look like the lower.
871 */
872static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
873{
874 int rc = 0;
875 struct dentry *lower_dentry;
876 struct inode *inode;
877 struct inode *lower_inode;
878 struct ecryptfs_crypt_stat *crypt_stat;
879
880 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
881 lower_dentry = ecryptfs_dentry_to_lower(dentry);
882 inode = dentry->d_inode;
883 lower_inode = ecryptfs_inode_to_lower(inode);
884 if (ia->ia_valid & ATTR_SIZE) {
885 ecryptfs_printk(KERN_DEBUG,
886 "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n",
887 ia->ia_valid, ATTR_SIZE);
888 rc = ecryptfs_truncate(dentry, ia->ia_size);
889 /* ecryptfs_truncate handles resizing of the lower file */
890 ia->ia_valid &= ~ATTR_SIZE;
891 ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n",
892 ia->ia_valid);
893 if (rc < 0)
894 goto out;
895 }
896 rc = notify_change(lower_dentry, ia);
897out:
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800898 fsstack_copy_attr_all(inode, lower_inode, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700899 return rc;
900}
901
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800902int
Michael Halcrow237fead2006-10-04 02:16:22 -0700903ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
904 size_t size, int flags)
905{
906 int rc = 0;
907 struct dentry *lower_dentry;
908
909 lower_dentry = ecryptfs_dentry_to_lower(dentry);
910 if (!lower_dentry->d_inode->i_op->setxattr) {
911 rc = -ENOSYS;
912 goto out;
913 }
914 mutex_lock(&lower_dentry->d_inode->i_mutex);
915 rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value,
916 size, flags);
917 mutex_unlock(&lower_dentry->d_inode->i_mutex);
918out:
919 return rc;
920}
921
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800922ssize_t
Michael Halcrow237fead2006-10-04 02:16:22 -0700923ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value,
924 size_t size)
925{
926 int rc = 0;
927 struct dentry *lower_dentry;
928
929 lower_dentry = ecryptfs_dentry_to_lower(dentry);
930 if (!lower_dentry->d_inode->i_op->getxattr) {
931 rc = -ENOSYS;
932 goto out;
933 }
934 mutex_lock(&lower_dentry->d_inode->i_mutex);
935 rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value,
936 size);
937 mutex_unlock(&lower_dentry->d_inode->i_mutex);
938out:
939 return rc;
940}
941
942static ssize_t
943ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size)
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->listxattr) {
950 rc = -ENOSYS;
951 goto out;
952 }
953 mutex_lock(&lower_dentry->d_inode->i_mutex);
954 rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size);
955 mutex_unlock(&lower_dentry->d_inode->i_mutex);
956out:
957 return rc;
958}
959
960static int ecryptfs_removexattr(struct dentry *dentry, const char *name)
961{
962 int rc = 0;
963 struct dentry *lower_dentry;
964
965 lower_dentry = ecryptfs_dentry_to_lower(dentry);
966 if (!lower_dentry->d_inode->i_op->removexattr) {
967 rc = -ENOSYS;
968 goto out;
969 }
970 mutex_lock(&lower_dentry->d_inode->i_mutex);
971 rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name);
972 mutex_unlock(&lower_dentry->d_inode->i_mutex);
973out:
974 return rc;
975}
976
977int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode)
978{
979 if ((ecryptfs_inode_to_lower(inode)
980 == (struct inode *)candidate_lower_inode))
981 return 1;
982 else
983 return 0;
984}
985
986int ecryptfs_inode_set(struct inode *inode, void *lower_inode)
987{
988 ecryptfs_init_inode(inode, (struct inode *)lower_inode);
989 return 0;
990}
991
Arjan van de Ven754661f2007-02-12 00:55:38 -0800992const struct inode_operations ecryptfs_symlink_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -0700993 .readlink = ecryptfs_readlink,
994 .follow_link = ecryptfs_follow_link,
995 .put_link = ecryptfs_put_link,
996 .permission = ecryptfs_permission,
997 .setattr = ecryptfs_setattr,
998 .setxattr = ecryptfs_setxattr,
999 .getxattr = ecryptfs_getxattr,
1000 .listxattr = ecryptfs_listxattr,
1001 .removexattr = ecryptfs_removexattr
1002};
1003
Arjan van de Ven754661f2007-02-12 00:55:38 -08001004const struct inode_operations ecryptfs_dir_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001005 .create = ecryptfs_create,
1006 .lookup = ecryptfs_lookup,
1007 .link = ecryptfs_link,
1008 .unlink = ecryptfs_unlink,
1009 .symlink = ecryptfs_symlink,
1010 .mkdir = ecryptfs_mkdir,
1011 .rmdir = ecryptfs_rmdir,
1012 .mknod = ecryptfs_mknod,
1013 .rename = ecryptfs_rename,
1014 .permission = ecryptfs_permission,
1015 .setattr = ecryptfs_setattr,
1016 .setxattr = ecryptfs_setxattr,
1017 .getxattr = ecryptfs_getxattr,
1018 .listxattr = ecryptfs_listxattr,
1019 .removexattr = ecryptfs_removexattr
1020};
1021
Arjan van de Ven754661f2007-02-12 00:55:38 -08001022const struct inode_operations ecryptfs_main_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001023 .permission = ecryptfs_permission,
1024 .setattr = ecryptfs_setattr,
1025 .setxattr = ecryptfs_setxattr,
1026 .getxattr = ecryptfs_getxattr,
1027 .listxattr = ecryptfs_listxattr,
1028 .removexattr = ecryptfs_removexattr
1029};