blob: 0981ae35ea164531ae0f127dbb6de120d7a7f56c [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);
Peter Zijlstra908e0a82007-03-07 20:41:30 -080041 mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT);
Michael Halcrow237fead2006-10-04 02:16:22 -070042 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);
Dmitriy Monakhovad5f1192007-03-05 00:30:12 -0800171 rc = ecryptfs_write_inode_size_to_metadata(lower_file, lower_inode,
172 inode, 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 lower_mnt = ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700204 /* Corresponding fput() at end of this function */
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800205 if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
206 lower_flags))) {
Michael Halcrow237fead2006-10-04 02:16:22 -0700207 ecryptfs_printk(KERN_ERR,
208 "Error opening dentry; rc = [%i]\n", rc);
209 goto out;
210 }
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800211 lower_inode = lower_dentry->d_inode;
Michael Halcrow237fead2006-10-04 02:16:22 -0700212 if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
213 ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800214 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
Michael Halcrow237fead2006-10-04 02:16:22 -0700215 goto out_fput;
216 }
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800217 crypt_stat->flags |= ECRYPTFS_NEW_FILE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700218 ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n");
219 rc = ecryptfs_new_file_context(ecryptfs_dentry);
220 if (rc) {
221 ecryptfs_printk(KERN_DEBUG, "Error creating new file "
222 "context\n");
223 goto out_fput;
224 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800225 rc = ecryptfs_write_metadata(ecryptfs_dentry, lower_file);
Michael Halcrow237fead2006-10-04 02:16:22 -0700226 if (rc) {
227 ecryptfs_printk(KERN_DEBUG, "Error writing headers\n");
228 goto out_fput;
229 }
230 rc = grow_file(ecryptfs_dentry, lower_file, inode, lower_inode);
231out_fput:
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800232 if ((rc = ecryptfs_close_lower_file(lower_file)))
233 printk(KERN_ERR "Error closing lower_file\n");
Michael Halcrow237fead2006-10-04 02:16:22 -0700234out:
235 return rc;
236}
237
238/**
239 * ecryptfs_create
240 * @dir: The inode of the directory in which to create the file.
241 * @dentry: The eCryptfs dentry
242 * @mode: The mode of the new file.
243 * @nd: nameidata
244 *
245 * Creates a new file.
246 *
247 * Returns zero on success; non-zero on error condition
248 */
249static int
250ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
251 int mode, struct nameidata *nd)
252{
253 int rc;
254
255 rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd);
256 if (unlikely(rc)) {
257 ecryptfs_printk(KERN_WARNING, "Failed to create file in"
258 "lower filesystem\n");
259 goto out;
260 }
261 /* At this point, a file exists on "disk"; we need to make sure
262 * that this on disk file is prepared to be an ecryptfs file */
263 rc = ecryptfs_initialize_file(ecryptfs_dentry);
264out:
265 return rc;
266}
267
268/**
269 * ecryptfs_lookup
270 * @dir: inode
271 * @dentry: The dentry
272 * @nd: nameidata, may be NULL
273 *
274 * Find a file on disk. If the file does not exist, then we'll add it to the
275 * dentry cache and continue on to read it from the disk.
276 */
277static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
278 struct nameidata *nd)
279{
280 int rc = 0;
281 struct dentry *lower_dir_dentry;
282 struct dentry *lower_dentry;
283 struct vfsmount *lower_mnt;
Michael Halcrow237fead2006-10-04 02:16:22 -0700284 char *encoded_name;
285 unsigned int encoded_namelen;
286 struct ecryptfs_crypt_stat *crypt_stat = NULL;
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800287 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
Michael Halcrow237fead2006-10-04 02:16:22 -0700288 char *page_virt = NULL;
289 struct inode *lower_inode;
290 u64 file_size;
291
292 lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent);
293 dentry->d_op = &ecryptfs_dops;
294 if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, "."))
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800295 || (dentry->d_name.len == 2
296 && !strcmp(dentry->d_name.name, ".."))) {
297 d_drop(dentry);
298 goto out;
299 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700300 encoded_namelen = ecryptfs_encode_filename(crypt_stat,
301 dentry->d_name.name,
302 dentry->d_name.len,
303 &encoded_name);
304 if (encoded_namelen < 0) {
305 rc = encoded_namelen;
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800306 d_drop(dentry);
307 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700308 }
309 ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen "
310 "= [%d]\n", encoded_name, encoded_namelen);
311 lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry,
312 encoded_namelen - 1);
313 kfree(encoded_name);
Michael Halcrow237fead2006-10-04 02:16:22 -0700314 if (IS_ERR(lower_dentry)) {
315 ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n");
316 rc = PTR_ERR(lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800317 d_drop(dentry);
318 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700319 }
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800320 lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
Michael Halcrow237fead2006-10-04 02:16:22 -0700321 ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->"
322 "d_name.name = [%s]\n", lower_dentry,
323 lower_dentry->d_name.name);
324 lower_inode = lower_dentry->d_inode;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800325 fsstack_copy_attr_atime(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700326 BUG_ON(!atomic_read(&lower_dentry->d_count));
327 ecryptfs_set_dentry_private(dentry,
328 kmem_cache_alloc(ecryptfs_dentry_info_cache,
Christoph Lametere94b1762006-12-06 20:33:17 -0800329 GFP_KERNEL));
Michael Halcrow237fead2006-10-04 02:16:22 -0700330 if (!ecryptfs_dentry_to_private(dentry)) {
331 rc = -ENOMEM;
332 ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting "
333 "to allocate ecryptfs_dentry_info struct\n");
334 goto out_dput;
335 }
336 ecryptfs_set_dentry_lower(dentry, lower_dentry);
337 ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt);
338 if (!lower_dentry->d_inode) {
339 /* We want to add because we couldn't find in lower */
340 d_add(dentry, NULL);
341 goto out;
342 }
343 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1);
344 if (rc) {
345 ecryptfs_printk(KERN_ERR, "Error interposing\n");
346 goto out_dput;
347 }
348 if (S_ISDIR(lower_inode->i_mode)) {
349 ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n");
350 goto out;
351 }
352 if (S_ISLNK(lower_inode->i_mode)) {
353 ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n");
354 goto out;
355 }
356 if (!nd) {
357 ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave"
358 "as we *think* we are about to unlink\n");
359 goto out;
360 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700361 /* Released in this function */
Robert P. J. Dayc3762222007-02-10 01:45:03 -0800362 page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2,
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800363 GFP_USER);
Michael Halcrow237fead2006-10-04 02:16:22 -0700364 if (!page_virt) {
365 rc = -ENOMEM;
366 ecryptfs_printk(KERN_ERR,
367 "Cannot ecryptfs_kmalloc a page\n");
368 goto out_dput;
369 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700370 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800371 if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
Michael Halcrow237fead2006-10-04 02:16:22 -0700372 ecryptfs_set_default_sizes(crypt_stat);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800373 rc = ecryptfs_read_and_validate_header_region(page_virt, lower_dentry,
374 nd->mnt);
Michael Halcrow237fead2006-10-04 02:16:22 -0700375 if (rc) {
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800376 rc = ecryptfs_read_and_validate_xattr_region(page_virt, dentry);
377 if (rc) {
378 printk(KERN_DEBUG "Valid metadata not found in header "
379 "region or xattr region; treating file as "
380 "unencrypted\n");
381 rc = 0;
Michael Halcrow237fead2006-10-04 02:16:22 -0700382 kmem_cache_free(ecryptfs_header_cache_2, page_virt);
383 goto out;
384 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800385 crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR;
Michael Halcrow237fead2006-10-04 02:16:22 -0700386 }
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800387 mount_crypt_stat = &ecryptfs_superblock_to_private(
388 dentry->d_sb)->mount_crypt_stat;
389 if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) {
390 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
391 file_size = (crypt_stat->header_extent_size
392 + i_size_read(lower_dentry->d_inode));
393 else
394 file_size = i_size_read(lower_dentry->d_inode);
395 } else {
396 memcpy(&file_size, page_virt, sizeof(file_size));
397 file_size = be64_to_cpu(file_size);
398 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800399 i_size_write(dentry->d_inode, (loff_t)file_size);
Michael Halcrow237fead2006-10-04 02:16:22 -0700400 kmem_cache_free(ecryptfs_header_cache_2, page_virt);
401 goto out;
402
403out_dput:
404 dput(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700405 d_drop(dentry);
406out:
407 return ERR_PTR(rc);
408}
409
410static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,
411 struct dentry *new_dentry)
412{
413 struct dentry *lower_old_dentry;
414 struct dentry *lower_new_dentry;
415 struct dentry *lower_dir_dentry;
416 u64 file_size_save;
417 int rc;
418
419 file_size_save = i_size_read(old_dentry->d_inode);
420 lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
421 lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
422 dget(lower_old_dentry);
423 dget(lower_new_dentry);
424 lower_dir_dentry = lock_parent(lower_new_dentry);
425 rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
426 lower_new_dentry);
427 if (rc || !lower_new_dentry->d_inode)
428 goto out_lock;
429 rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0);
430 if (rc)
431 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800432 fsstack_copy_attr_times(dir, lower_new_dentry->d_inode);
433 fsstack_copy_inode_size(dir, lower_new_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700434 old_dentry->d_inode->i_nlink =
435 ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink;
436 i_size_write(new_dentry->d_inode, file_size_save);
437out_lock:
438 unlock_dir(lower_dir_dentry);
439 dput(lower_new_dentry);
440 dput(lower_old_dentry);
Michael Halcrowae56fb12006-11-16 01:19:30 -0800441 d_drop(lower_old_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800442 d_drop(new_dentry);
443 d_drop(old_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700444 return rc;
445}
446
447static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)
448{
449 int rc = 0;
450 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
451 struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
452
453 lock_parent(lower_dentry);
454 rc = vfs_unlink(lower_dir_inode, lower_dentry);
455 if (rc) {
Michael Halcrowae56fb12006-11-16 01:19:30 -0800456 printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700457 goto out_unlock;
458 }
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800459 fsstack_copy_attr_times(dir, lower_dir_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700460 dentry->d_inode->i_nlink =
461 ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink;
462 dentry->d_inode->i_ctime = dir->i_ctime;
463out_unlock:
464 unlock_parent(lower_dentry);
465 return rc;
466}
467
468static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
469 const char *symname)
470{
471 int rc;
472 struct dentry *lower_dentry;
473 struct dentry *lower_dir_dentry;
474 umode_t mode;
475 char *encoded_symname;
476 unsigned int encoded_symlen;
477 struct ecryptfs_crypt_stat *crypt_stat = NULL;
478
479 lower_dentry = ecryptfs_dentry_to_lower(dentry);
480 dget(lower_dentry);
481 lower_dir_dentry = lock_parent(lower_dentry);
482 mode = S_IALLUGO;
483 encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname,
484 strlen(symname),
485 &encoded_symname);
486 if (encoded_symlen < 0) {
487 rc = encoded_symlen;
488 goto out_lock;
489 }
490 rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
491 encoded_symname, mode);
492 kfree(encoded_symname);
493 if (rc || !lower_dentry->d_inode)
494 goto out_lock;
495 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
496 if (rc)
497 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800498 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
499 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700500out_lock:
501 unlock_dir(lower_dir_dentry);
502 dput(lower_dentry);
503 if (!dentry->d_inode)
504 d_drop(dentry);
505 return rc;
506}
507
508static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
509{
510 int rc;
511 struct dentry *lower_dentry;
512 struct dentry *lower_dir_dentry;
513
514 lower_dentry = ecryptfs_dentry_to_lower(dentry);
515 lower_dir_dentry = lock_parent(lower_dentry);
516 rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode);
517 if (rc || !lower_dentry->d_inode)
518 goto out;
519 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
520 if (rc)
521 goto out;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800522 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
523 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700524 dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
525out:
526 unlock_dir(lower_dir_dentry);
527 if (!dentry->d_inode)
528 d_drop(dentry);
529 return rc;
530}
531
532static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
533{
Michael Halcrow237fead2006-10-04 02:16:22 -0700534 struct dentry *lower_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700535 struct dentry *lower_dir_dentry;
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800536 int rc;
Michael Halcrow237fead2006-10-04 02:16:22 -0700537
538 lower_dentry = ecryptfs_dentry_to_lower(dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800539 dget(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700540 lower_dir_dentry = lock_parent(lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800541 dget(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700542 rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800543 dput(lower_dentry);
544 if (!rc)
545 d_delete(lower_dentry);
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800546 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700547 dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
548 unlock_dir(lower_dir_dentry);
549 if (!rc)
550 d_drop(dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800551 dput(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700552 return rc;
553}
554
555static int
556ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
557{
558 int rc;
559 struct dentry *lower_dentry;
560 struct dentry *lower_dir_dentry;
561
562 lower_dentry = ecryptfs_dentry_to_lower(dentry);
563 lower_dir_dentry = lock_parent(lower_dentry);
564 rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev);
565 if (rc || !lower_dentry->d_inode)
566 goto out;
567 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
568 if (rc)
569 goto out;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800570 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
571 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700572out:
573 unlock_dir(lower_dir_dentry);
574 if (!dentry->d_inode)
575 d_drop(dentry);
576 return rc;
577}
578
579static int
580ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
581 struct inode *new_dir, struct dentry *new_dentry)
582{
583 int rc;
584 struct dentry *lower_old_dentry;
585 struct dentry *lower_new_dentry;
586 struct dentry *lower_old_dir_dentry;
587 struct dentry *lower_new_dir_dentry;
588
589 lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
590 lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
591 dget(lower_old_dentry);
592 dget(lower_new_dentry);
593 lower_old_dir_dentry = dget_parent(lower_old_dentry);
594 lower_new_dir_dentry = dget_parent(lower_new_dentry);
595 lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
596 rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry,
597 lower_new_dir_dentry->d_inode, lower_new_dentry);
598 if (rc)
599 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800600 fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700601 if (new_dir != old_dir)
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800602 fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700603out_lock:
604 unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
Michael Halcrowa9083082006-11-16 01:19:16 -0800605 dput(lower_new_dentry->d_parent);
606 dput(lower_old_dentry->d_parent);
Michael Halcrow237fead2006-10-04 02:16:22 -0700607 dput(lower_new_dentry);
608 dput(lower_old_dentry);
609 return rc;
610}
611
612static int
613ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz)
614{
615 int rc;
616 struct dentry *lower_dentry;
617 char *decoded_name;
618 char *lower_buf;
619 mm_segment_t old_fs;
620 struct ecryptfs_crypt_stat *crypt_stat;
621
622 lower_dentry = ecryptfs_dentry_to_lower(dentry);
623 if (!lower_dentry->d_inode->i_op ||
624 !lower_dentry->d_inode->i_op->readlink) {
625 rc = -EINVAL;
626 goto out;
627 }
628 /* Released in this function */
629 lower_buf = kmalloc(bufsiz, GFP_KERNEL);
630 if (lower_buf == NULL) {
631 ecryptfs_printk(KERN_ERR, "Out of memory\n");
632 rc = -ENOMEM;
633 goto out;
634 }
635 old_fs = get_fs();
636 set_fs(get_ds());
637 ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ "
638 "lower_dentry->d_name.name = [%s]\n",
639 lower_dentry->d_name.name);
640 rc = lower_dentry->d_inode->i_op->readlink(lower_dentry,
641 (char __user *)lower_buf,
642 bufsiz);
643 set_fs(old_fs);
644 if (rc >= 0) {
645 crypt_stat = NULL;
646 rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc,
647 &decoded_name);
648 if (rc == -ENOMEM)
649 goto out_free_lower_buf;
650 if (rc > 0) {
651 ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes "
652 "to userspace: [%*s]\n", rc,
653 decoded_name);
654 if (copy_to_user(buf, decoded_name, rc))
655 rc = -EFAULT;
656 }
657 kfree(decoded_name);
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800658 fsstack_copy_attr_atime(dentry->d_inode,
659 lower_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700660 }
661out_free_lower_buf:
662 kfree(lower_buf);
663out:
664 return rc;
665}
666
667static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd)
668{
669 char *buf;
670 int len = PAGE_SIZE, rc;
671 mm_segment_t old_fs;
672
673 /* Released in ecryptfs_put_link(); only release here on error */
674 buf = kmalloc(len, GFP_KERNEL);
675 if (!buf) {
676 rc = -ENOMEM;
677 goto out;
678 }
679 old_fs = get_fs();
680 set_fs(get_ds());
681 ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ "
682 "dentry->d_name.name = [%s]\n", dentry->d_name.name);
683 rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len);
684 buf[rc] = '\0';
685 set_fs(old_fs);
686 if (rc < 0)
687 goto out_free;
688 rc = 0;
689 nd_set_link(nd, buf);
690 goto out;
691out_free:
692 kfree(buf);
693out:
694 return ERR_PTR(rc);
695}
696
697static void
698ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
699{
700 /* Free the char* */
701 kfree(nd_get_link(nd));
702}
703
704/**
705 * upper_size_to_lower_size
706 * @crypt_stat: Crypt_stat associated with file
707 * @upper_size: Size of the upper file
708 *
709 * Calculate the requried size of the lower file based on the
710 * specified size of the upper file. This calculation is based on the
711 * number of headers in the underlying file and the extent size.
712 *
713 * Returns Calculated size of the lower file.
714 */
715static loff_t
716upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat,
717 loff_t upper_size)
718{
719 loff_t lower_size;
720
721 lower_size = ( crypt_stat->header_extent_size
722 * crypt_stat->num_header_extents_at_front );
723 if (upper_size != 0) {
724 loff_t num_extents;
725
726 num_extents = upper_size >> crypt_stat->extent_shift;
727 if (upper_size & ~crypt_stat->extent_mask)
728 num_extents++;
729 lower_size += (num_extents * crypt_stat->extent_size);
730 }
731 return lower_size;
732}
733
734/**
735 * ecryptfs_truncate
736 * @dentry: The ecryptfs layer dentry
737 * @new_length: The length to expand the file to
738 *
739 * Function to handle truncations modifying the size of the file. Note
740 * that the file sizes are interpolated. When expanding, we are simply
741 * writing strings of 0's out. When truncating, we need to modify the
742 * underlying file size according to the page index interpolations.
743 *
744 * Returns zero on success; non-zero otherwise
745 */
746int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
747{
748 int rc = 0;
749 struct inode *inode = dentry->d_inode;
750 struct dentry *lower_dentry;
751 struct vfsmount *lower_mnt;
752 struct file fake_ecryptfs_file, *lower_file = NULL;
753 struct ecryptfs_crypt_stat *crypt_stat;
754 loff_t i_size = i_size_read(inode);
755 loff_t lower_size_before_truncate;
756 loff_t lower_size_after_truncate;
757
758 if (unlikely((new_length == i_size)))
759 goto out;
760 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
761 /* Set up a fake ecryptfs file, this is used to interface with
762 * the file in the underlying filesystem so that the
763 * truncation has an effect there as well. */
764 memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file));
Josef "Jeff" Sipekbd243a42006-12-08 02:36:48 -0800765 fake_ecryptfs_file.f_path.dentry = dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700766 /* Released at out_free: label */
767 ecryptfs_set_file_private(&fake_ecryptfs_file,
768 kmem_cache_alloc(ecryptfs_file_info_cache,
Christoph Lametere94b1762006-12-06 20:33:17 -0800769 GFP_KERNEL));
Michael Halcrow237fead2006-10-04 02:16:22 -0700770 if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) {
771 rc = -ENOMEM;
772 goto out;
773 }
774 lower_dentry = ecryptfs_dentry_to_lower(dentry);
775 /* This dget & mntget is released through fput at out_fput: */
Michael Halcrow237fead2006-10-04 02:16:22 -0700776 lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800777 if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
778 O_RDWR))) {
779 ecryptfs_printk(KERN_ERR,
780 "Error opening dentry; rc = [%i]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700781 goto out_free;
782 }
783 ecryptfs_set_file_lower(&fake_ecryptfs_file, lower_file);
784 /* Switch on growing or shrinking file */
785 if (new_length > i_size) {
786 rc = ecryptfs_fill_zeros(&fake_ecryptfs_file, new_length);
787 if (rc) {
788 ecryptfs_printk(KERN_ERR,
789 "Problem with fill_zeros\n");
790 goto out_fput;
791 }
792 i_size_write(inode, new_length);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800793 rc = ecryptfs_write_inode_size_to_metadata(
794 lower_file, lower_dentry->d_inode, inode, dentry,
795 ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
Michael Halcrow237fead2006-10-04 02:16:22 -0700796 if (rc) {
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800797 printk(KERN_ERR "Problem with "
798 "ecryptfs_write_inode_size_to_metadata; "
799 "rc = [%d]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700800 goto out_fput;
801 }
802 } else { /* new_length < i_size_read(inode) */
Michael Halcrow240e2df2007-06-27 14:09:44 -0700803 pgoff_t index = 0;
804 int end_pos_in_page = -1;
805
806 if (new_length != 0) {
807 index = ((new_length - 1) >> PAGE_CACHE_SHIFT);
808 end_pos_in_page = ((new_length - 1) & ~PAGE_CACHE_MASK);
809 }
810 if (end_pos_in_page != (PAGE_CACHE_SIZE - 1)) {
811 if ((rc = ecryptfs_write_zeros(&fake_ecryptfs_file,
812 index,
813 (end_pos_in_page + 1),
814 ((PAGE_CACHE_SIZE - 1)
815 - end_pos_in_page)))) {
816 printk(KERN_ERR "Error attempting to zero out "
817 "the remainder of the end page on "
818 "reducing truncate; rc = [%d]\n", rc);
819 goto out_fput;
820 }
821 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700822 vmtruncate(inode, new_length);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800823 rc = ecryptfs_write_inode_size_to_metadata(
824 lower_file, lower_dentry->d_inode, inode, dentry,
825 ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
826 if (rc) {
827 printk(KERN_ERR "Problem with "
828 "ecryptfs_write_inode_size_to_metadata; "
829 "rc = [%d]\n", rc);
830 goto out_fput;
831 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700832 /* We are reducing the size of the ecryptfs file, and need to
833 * know if we need to reduce the size of the lower file. */
834 lower_size_before_truncate =
835 upper_size_to_lower_size(crypt_stat, i_size);
836 lower_size_after_truncate =
837 upper_size_to_lower_size(crypt_stat, new_length);
838 if (lower_size_after_truncate < lower_size_before_truncate)
839 vmtruncate(lower_dentry->d_inode,
840 lower_size_after_truncate);
841 }
842 /* Update the access times */
843 lower_dentry->d_inode->i_mtime = lower_dentry->d_inode->i_ctime
844 = CURRENT_TIME;
845 mark_inode_dirty_sync(inode);
846out_fput:
Michael Halcrow7ff1d742006-10-30 22:07:19 -0800847 if ((rc = ecryptfs_close_lower_file(lower_file)))
848 printk(KERN_ERR "Error closing lower_file\n");
Michael Halcrow237fead2006-10-04 02:16:22 -0700849out_free:
850 if (ecryptfs_file_to_private(&fake_ecryptfs_file))
851 kmem_cache_free(ecryptfs_file_info_cache,
852 ecryptfs_file_to_private(&fake_ecryptfs_file));
853out:
854 return rc;
855}
856
857static int
858ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
859{
860 int rc;
861
862 if (nd) {
863 struct vfsmount *vfsmnt_save = nd->mnt;
864 struct dentry *dentry_save = nd->dentry;
865
866 nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry);
867 nd->dentry = ecryptfs_dentry_to_lower(nd->dentry);
868 rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
869 nd->mnt = vfsmnt_save;
870 nd->dentry = dentry_save;
871 } else
872 rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
873 return rc;
874}
875
876/**
877 * ecryptfs_setattr
878 * @dentry: dentry handle to the inode to modify
879 * @ia: Structure with flags of what to change and values
880 *
881 * Updates the metadata of an inode. If the update is to the size
882 * i.e. truncation, then ecryptfs_truncate will handle the size modification
883 * of both the ecryptfs inode and the lower inode.
884 *
885 * All other metadata changes will be passed right to the lower filesystem,
886 * and we will just update our inode to look like the lower.
887 */
888static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
889{
890 int rc = 0;
891 struct dentry *lower_dentry;
892 struct inode *inode;
893 struct inode *lower_inode;
894 struct ecryptfs_crypt_stat *crypt_stat;
895
896 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
897 lower_dentry = ecryptfs_dentry_to_lower(dentry);
898 inode = dentry->d_inode;
899 lower_inode = ecryptfs_inode_to_lower(inode);
900 if (ia->ia_valid & ATTR_SIZE) {
901 ecryptfs_printk(KERN_DEBUG,
902 "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n",
903 ia->ia_valid, ATTR_SIZE);
904 rc = ecryptfs_truncate(dentry, ia->ia_size);
905 /* ecryptfs_truncate handles resizing of the lower file */
906 ia->ia_valid &= ~ATTR_SIZE;
907 ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n",
908 ia->ia_valid);
909 if (rc < 0)
910 goto out;
911 }
912 rc = notify_change(lower_dentry, ia);
913out:
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800914 fsstack_copy_attr_all(inode, lower_inode, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700915 return rc;
916}
917
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800918int
Michael Halcrow237fead2006-10-04 02:16:22 -0700919ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
920 size_t size, int flags)
921{
922 int rc = 0;
923 struct dentry *lower_dentry;
924
925 lower_dentry = ecryptfs_dentry_to_lower(dentry);
926 if (!lower_dentry->d_inode->i_op->setxattr) {
927 rc = -ENOSYS;
928 goto out;
929 }
930 mutex_lock(&lower_dentry->d_inode->i_mutex);
931 rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value,
932 size, flags);
933 mutex_unlock(&lower_dentry->d_inode->i_mutex);
934out:
935 return rc;
936}
937
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800938ssize_t
Michael Halcrow237fead2006-10-04 02:16:22 -0700939ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value,
940 size_t size)
941{
942 int rc = 0;
943 struct dentry *lower_dentry;
944
945 lower_dentry = ecryptfs_dentry_to_lower(dentry);
946 if (!lower_dentry->d_inode->i_op->getxattr) {
947 rc = -ENOSYS;
948 goto out;
949 }
950 mutex_lock(&lower_dentry->d_inode->i_mutex);
951 rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value,
952 size);
953 mutex_unlock(&lower_dentry->d_inode->i_mutex);
954out:
955 return rc;
956}
957
958static ssize_t
959ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size)
960{
961 int rc = 0;
962 struct dentry *lower_dentry;
963
964 lower_dentry = ecryptfs_dentry_to_lower(dentry);
965 if (!lower_dentry->d_inode->i_op->listxattr) {
966 rc = -ENOSYS;
967 goto out;
968 }
969 mutex_lock(&lower_dentry->d_inode->i_mutex);
970 rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size);
971 mutex_unlock(&lower_dentry->d_inode->i_mutex);
972out:
973 return rc;
974}
975
976static int ecryptfs_removexattr(struct dentry *dentry, const char *name)
977{
978 int rc = 0;
979 struct dentry *lower_dentry;
980
981 lower_dentry = ecryptfs_dentry_to_lower(dentry);
982 if (!lower_dentry->d_inode->i_op->removexattr) {
983 rc = -ENOSYS;
984 goto out;
985 }
986 mutex_lock(&lower_dentry->d_inode->i_mutex);
987 rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name);
988 mutex_unlock(&lower_dentry->d_inode->i_mutex);
989out:
990 return rc;
991}
992
993int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode)
994{
995 if ((ecryptfs_inode_to_lower(inode)
996 == (struct inode *)candidate_lower_inode))
997 return 1;
998 else
999 return 0;
1000}
1001
1002int ecryptfs_inode_set(struct inode *inode, void *lower_inode)
1003{
1004 ecryptfs_init_inode(inode, (struct inode *)lower_inode);
1005 return 0;
1006}
1007
Arjan van de Ven754661f2007-02-12 00:55:38 -08001008const struct inode_operations ecryptfs_symlink_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001009 .readlink = ecryptfs_readlink,
1010 .follow_link = ecryptfs_follow_link,
1011 .put_link = ecryptfs_put_link,
1012 .permission = ecryptfs_permission,
1013 .setattr = ecryptfs_setattr,
1014 .setxattr = ecryptfs_setxattr,
1015 .getxattr = ecryptfs_getxattr,
1016 .listxattr = ecryptfs_listxattr,
1017 .removexattr = ecryptfs_removexattr
1018};
1019
Arjan van de Ven754661f2007-02-12 00:55:38 -08001020const struct inode_operations ecryptfs_dir_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001021 .create = ecryptfs_create,
1022 .lookup = ecryptfs_lookup,
1023 .link = ecryptfs_link,
1024 .unlink = ecryptfs_unlink,
1025 .symlink = ecryptfs_symlink,
1026 .mkdir = ecryptfs_mkdir,
1027 .rmdir = ecryptfs_rmdir,
1028 .mknod = ecryptfs_mknod,
1029 .rename = ecryptfs_rename,
1030 .permission = ecryptfs_permission,
1031 .setattr = ecryptfs_setattr,
1032 .setxattr = ecryptfs_setxattr,
1033 .getxattr = ecryptfs_getxattr,
1034 .listxattr = ecryptfs_listxattr,
1035 .removexattr = ecryptfs_removexattr
1036};
1037
Arjan van de Ven754661f2007-02-12 00:55:38 -08001038const struct inode_operations ecryptfs_main_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001039 .permission = ecryptfs_permission,
1040 .setattr = ecryptfs_setattr,
1041 .setxattr = ecryptfs_setxattr,
1042 .getxattr = ecryptfs_getxattr,
1043 .listxattr = ecryptfs_listxattr,
1044 .removexattr = ecryptfs_removexattr
1045};