blob: 3fbc94203380acf8e6095627ee610ff058df5f38 [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090034#include <linux/slab.h>
Harvey Harrison0a688ad2008-07-23 21:30:07 -070035#include <asm/unaligned.h>
Michael Halcrow237fead2006-10-04 02:16:22 -070036#include "ecryptfs_kernel.h"
37
38static struct dentry *lock_parent(struct dentry *dentry)
39{
40 struct dentry *dir;
41
Miklos Szeredi8dc4e372008-05-12 14:02:04 -070042 dir = dget_parent(dentry);
Peter Zijlstra908e0a82007-03-07 20:41:30 -080043 mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT);
Michael Halcrow237fead2006-10-04 02:16:22 -070044 return dir;
45}
46
Michael Halcrow237fead2006-10-04 02:16:22 -070047static void unlock_dir(struct dentry *dir)
48{
49 mutex_unlock(&dir->d_inode->i_mutex);
50 dput(dir);
51}
52
Michael Halcrow237fead2006-10-04 02:16:22 -070053/**
54 * ecryptfs_create_underlying_file
55 * @lower_dir_inode: inode of the parent in the lower fs of the new file
Qinghuang Fengf70f5822009-01-06 14:42:05 -080056 * @dentry: New file's dentry
Michael Halcrow237fead2006-10-04 02:16:22 -070057 * @mode: The mode of the new file
58 * @nd: nameidata of ecryptfs' parent's dentry & vfsmount
59 *
60 * Creates the file in the lower file system.
61 *
62 * Returns zero on success; non-zero on error condition
63 */
64static int
65ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
66 struct dentry *dentry, int mode,
67 struct nameidata *nd)
68{
69 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
70 struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
71 struct dentry *dentry_save;
72 struct vfsmount *vfsmount_save;
73 int rc;
74
Jan Blunck4ac91372008-02-14 19:34:32 -080075 dentry_save = nd->path.dentry;
76 vfsmount_save = nd->path.mnt;
77 nd->path.dentry = lower_dentry;
78 nd->path.mnt = lower_mnt;
Michael Halcrow237fead2006-10-04 02:16:22 -070079 rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
Jan Blunck4ac91372008-02-14 19:34:32 -080080 nd->path.dentry = dentry_save;
81 nd->path.mnt = vfsmount_save;
Michael Halcrow237fead2006-10-04 02:16:22 -070082 return rc;
83}
84
85/**
86 * ecryptfs_do_create
87 * @directory_inode: inode of the new file's dentry's parent in ecryptfs
88 * @ecryptfs_dentry: New file's dentry in ecryptfs
89 * @mode: The mode of the new file
90 * @nd: nameidata of ecryptfs' parent's dentry & vfsmount
91 *
92 * Creates the underlying file and the eCryptfs inode which will link to
93 * it. It will also update the eCryptfs directory inode to mimic the
94 * stat of the lower directory inode.
95 *
96 * Returns zero on success; non-zero on error condition
97 */
98static int
99ecryptfs_do_create(struct inode *directory_inode,
100 struct dentry *ecryptfs_dentry, int mode,
101 struct nameidata *nd)
102{
103 int rc;
104 struct dentry *lower_dentry;
105 struct dentry *lower_dir_dentry;
106
107 lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
108 lower_dir_dentry = lock_parent(lower_dentry);
Hirofumi Nakagawa801678c2008-04-29 01:03:09 -0700109 if (IS_ERR(lower_dir_dentry)) {
Michael Halcrow237fead2006-10-04 02:16:22 -0700110 ecryptfs_printk(KERN_ERR, "Error locking directory of "
111 "dentry\n");
112 rc = PTR_ERR(lower_dir_dentry);
113 goto out;
114 }
115 rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode,
116 ecryptfs_dentry, mode, nd);
Michael Halcrow4981e082007-10-16 01:28:09 -0700117 if (rc) {
Michael Halcrowcaeeeec2008-01-08 15:33:02 -0800118 printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
Harvey Harrison18d1dbf2008-04-29 00:59:48 -0700119 "rc = [%d]\n", __func__, rc);
Michael Halcrowcaeeeec2008-01-08 15:33:02 -0800120 goto out_lock;
Michael Halcrow237fead2006-10-04 02:16:22 -0700121 }
122 rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry,
123 directory_inode->i_sb, 0);
124 if (rc) {
125 ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n");
126 goto out_lock;
127 }
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800128 fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode);
129 fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700130out_lock:
131 unlock_dir(lower_dir_dentry);
132out:
133 return rc;
134}
135
136/**
137 * grow_file
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700138 * @ecryptfs_dentry: the eCryptfs dentry
Michael Halcrow237fead2006-10-04 02:16:22 -0700139 *
140 * This is the code which will grow the file to its correct size.
141 */
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700142static int grow_file(struct dentry *ecryptfs_dentry)
Michael Halcrow237fead2006-10-04 02:16:22 -0700143{
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700144 struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode;
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700145 char zero_virt[] = { 0x00 };
146 int rc = 0;
Michael Halcrow237fead2006-10-04 02:16:22 -0700147
Al Viro48c1e442010-05-21 11:09:58 -0400148 rc = ecryptfs_write(ecryptfs_inode, zero_virt, 0, 1);
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700149 i_size_write(ecryptfs_inode, 0);
150 rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode);
151 ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat.flags |=
152 ECRYPTFS_NEW_FILE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700153 return rc;
154}
155
156/**
157 * ecryptfs_initialize_file
158 *
159 * Cause the file to be changed from a basic empty file to an ecryptfs
160 * file with a header and first data page.
161 *
162 * Returns zero on success
163 */
164static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry)
165{
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700166 struct ecryptfs_crypt_stat *crypt_stat =
167 &ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat;
Michael Halcrow237fead2006-10-04 02:16:22 -0700168 int rc = 0;
Michael Halcrow237fead2006-10-04 02:16:22 -0700169
Michael Halcrow237fead2006-10-04 02:16:22 -0700170 if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
171 ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800172 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700173 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700174 }
Michael Halcrowe2bd99e2007-02-12 00:53:49 -0800175 crypt_stat->flags |= ECRYPTFS_NEW_FILE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700176 ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n");
177 rc = ecryptfs_new_file_context(ecryptfs_dentry);
178 if (rc) {
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700179 ecryptfs_printk(KERN_ERR, "Error creating new file "
180 "context; rc = [%d]\n", rc);
181 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700182 }
Michael Halcrow391b52f2008-07-23 21:30:08 -0700183 if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) {
184 rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
185 if (rc) {
186 printk(KERN_ERR "%s: Error attempting to initialize "
187 "the persistent file for the dentry with name "
188 "[%s]; rc = [%d]\n", __func__,
189 ecryptfs_dentry->d_name.name, rc);
190 goto out;
191 }
192 }
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700193 rc = ecryptfs_write_metadata(ecryptfs_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700194 if (rc) {
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700195 printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc);
196 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700197 }
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700198 rc = grow_file(ecryptfs_dentry);
Michael Halcrow5dda6992007-10-16 01:28:06 -0700199 if (rc)
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700200 printk(KERN_ERR "Error growing file; rc = [%d]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700201out:
202 return rc;
203}
204
205/**
206 * ecryptfs_create
207 * @dir: The inode of the directory in which to create the file.
208 * @dentry: The eCryptfs dentry
209 * @mode: The mode of the new file.
210 * @nd: nameidata
211 *
212 * Creates a new file.
213 *
214 * Returns zero on success; non-zero on error condition
215 */
216static int
217ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
218 int mode, struct nameidata *nd)
219{
220 int rc;
221
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800222 /* ecryptfs_do_create() calls ecryptfs_interpose() */
Michael Halcrow237fead2006-10-04 02:16:22 -0700223 rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd);
224 if (unlikely(rc)) {
225 ecryptfs_printk(KERN_WARNING, "Failed to create file in"
226 "lower filesystem\n");
227 goto out;
228 }
229 /* At this point, a file exists on "disk"; we need to make sure
230 * that this on disk file is prepared to be an ecryptfs file */
231 rc = ecryptfs_initialize_file(ecryptfs_dentry);
232out:
233 return rc;
234}
235
236/**
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800237 * ecryptfs_lookup_and_interpose_lower - Perform a lookup
Michael Halcrow237fead2006-10-04 02:16:22 -0700238 */
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800239int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
240 struct dentry *lower_dentry,
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800241 struct inode *ecryptfs_dir_inode,
242 struct nameidata *ecryptfs_nd)
Michael Halcrow237fead2006-10-04 02:16:22 -0700243{
Michael Halcrow237fead2006-10-04 02:16:22 -0700244 struct dentry *lower_dir_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700245 struct vfsmount *lower_mnt;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800246 struct inode *lower_inode;
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800247 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
Tyler Hicks2aac0cf2009-03-20 02:23:57 -0500248 struct ecryptfs_crypt_stat *crypt_stat;
Michael Halcrow237fead2006-10-04 02:16:22 -0700249 char *page_virt = NULL;
Michael Halcrow237fead2006-10-04 02:16:22 -0700250 u64 file_size;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800251 int rc = 0;
Michael Halcrow237fead2006-10-04 02:16:22 -0700252
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800253 lower_dir_dentry = lower_dentry->d_parent;
254 lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(
255 ecryptfs_dentry->d_parent));
Michael Halcrow237fead2006-10-04 02:16:22 -0700256 lower_inode = lower_dentry->d_inode;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800257 fsstack_copy_attr_atime(ecryptfs_dir_inode, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700258 BUG_ON(!atomic_read(&lower_dentry->d_count));
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800259 ecryptfs_set_dentry_private(ecryptfs_dentry,
Michael Halcrow237fead2006-10-04 02:16:22 -0700260 kmem_cache_alloc(ecryptfs_dentry_info_cache,
Christoph Lametere94b1762006-12-06 20:33:17 -0800261 GFP_KERNEL));
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800262 if (!ecryptfs_dentry_to_private(ecryptfs_dentry)) {
Michael Halcrow237fead2006-10-04 02:16:22 -0700263 rc = -ENOMEM;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800264 printk(KERN_ERR "%s: Out of memory whilst attempting "
265 "to allocate ecryptfs_dentry_info struct\n",
266 __func__);
Lino Sanfilippo31f73be2010-07-29 13:01:36 +0200267 goto out_put;
Michael Halcrow237fead2006-10-04 02:16:22 -0700268 }
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800269 ecryptfs_set_dentry_lower(ecryptfs_dentry, lower_dentry);
270 ecryptfs_set_dentry_lower_mnt(ecryptfs_dentry, lower_mnt);
Michael Halcrow237fead2006-10-04 02:16:22 -0700271 if (!lower_dentry->d_inode) {
272 /* We want to add because we couldn't find in lower */
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800273 d_add(ecryptfs_dentry, NULL);
Michael Halcrow237fead2006-10-04 02:16:22 -0700274 goto out;
275 }
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800276 rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry,
Erez Zadok3469b572009-12-06 18:51:15 -0500277 ecryptfs_dir_inode->i_sb,
278 ECRYPTFS_INTERPOSE_FLAG_D_ADD);
Michael Halcrow237fead2006-10-04 02:16:22 -0700279 if (rc) {
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800280 printk(KERN_ERR "%s: Error interposing; rc = [%d]\n",
281 __func__, rc);
Michael Halcrow391b52f2008-07-23 21:30:08 -0700282 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700283 }
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800284 if (S_ISDIR(lower_inode->i_mode))
Michael Halcrow237fead2006-10-04 02:16:22 -0700285 goto out;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800286 if (S_ISLNK(lower_inode->i_mode))
Michael Halcrow237fead2006-10-04 02:16:22 -0700287 goto out;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800288 if (special_file(lower_inode->i_mode))
Ryusuke Konishi202a21d2007-08-10 13:00:51 -0700289 goto out;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800290 if (!ecryptfs_nd)
Michael Halcrow237fead2006-10-04 02:16:22 -0700291 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700292 /* Released in this function */
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800293 page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, GFP_USER);
Michael Halcrow237fead2006-10-04 02:16:22 -0700294 if (!page_virt) {
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800295 printk(KERN_ERR "%s: Cannot kmem_cache_zalloc() a page\n",
296 __func__);
Michael Halcrow237fead2006-10-04 02:16:22 -0700297 rc = -ENOMEM;
Michael Halcrow391b52f2008-07-23 21:30:08 -0700298 goto out;
Michael Halcrow237fead2006-10-04 02:16:22 -0700299 }
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800300 if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) {
301 rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
Michael Halcrow391b52f2008-07-23 21:30:08 -0700302 if (rc) {
303 printk(KERN_ERR "%s: Error attempting to initialize "
304 "the persistent file for the dentry with name "
305 "[%s]; rc = [%d]\n", __func__,
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800306 ecryptfs_dentry->d_name.name, rc);
307 goto out_free_kmem;
Michael Halcrow391b52f2008-07-23 21:30:08 -0700308 }
309 }
Tyler Hicks2aac0cf2009-03-20 02:23:57 -0500310 crypt_stat = &ecryptfs_inode_to_private(
311 ecryptfs_dentry->d_inode)->crypt_stat;
312 /* TODO: lock for crypt_stat comparison */
313 if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
314 ecryptfs_set_default_sizes(crypt_stat);
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -0700315 rc = ecryptfs_read_and_validate_header_region(page_virt,
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800316 ecryptfs_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700317 if (rc) {
Tyler Hicks1984c232010-02-10 23:17:44 -0600318 memset(page_virt, 0, PAGE_CACHE_SIZE);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800319 rc = ecryptfs_read_and_validate_xattr_region(page_virt,
320 ecryptfs_dentry);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800321 if (rc) {
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800322 rc = 0;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800323 goto out_free_kmem;
Michael Halcrow237fead2006-10-04 02:16:22 -0700324 }
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800325 crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR;
Michael Halcrow237fead2006-10-04 02:16:22 -0700326 }
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800327 mount_crypt_stat = &ecryptfs_superblock_to_private(
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800328 ecryptfs_dentry->d_sb)->mount_crypt_stat;
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800329 if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) {
330 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
Tyler Hicksfa3ef1c2010-02-11 05:09:14 -0600331 file_size = (crypt_stat->metadata_size
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800332 + i_size_read(lower_dentry->d_inode));
333 else
334 file_size = i_size_read(lower_dentry->d_inode);
335 } else {
Harvey Harrison0a688ad2008-07-23 21:30:07 -0700336 file_size = get_unaligned_be64(page_virt);
Michael Halcrowe77a56d2007-02-12 00:53:47 -0800337 }
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800338 i_size_write(ecryptfs_dentry->d_inode, (loff_t)file_size);
339out_free_kmem:
Michael Halcrow237fead2006-10-04 02:16:22 -0700340 kmem_cache_free(ecryptfs_header_cache_2, page_virt);
341 goto out;
Lino Sanfilippo31f73be2010-07-29 13:01:36 +0200342out_put:
Michael Halcrow237fead2006-10-04 02:16:22 -0700343 dput(lower_dentry);
Lino Sanfilippo31f73be2010-07-29 13:01:36 +0200344 mntput(lower_mnt);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800345 d_drop(ecryptfs_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700346out:
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800347 return rc;
348}
349
350/**
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200351 * ecryptfs_new_lower_dentry
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500352 * @name: The name of the new dentry.
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200353 * @lower_dir_dentry: Parent directory of the new dentry.
354 * @nd: nameidata from last lookup.
355 *
356 * Create a new dentry or get it from lower parent dir.
357 */
358static struct dentry *
359ecryptfs_new_lower_dentry(struct qstr *name, struct dentry *lower_dir_dentry,
360 struct nameidata *nd)
361{
362 struct dentry *new_dentry;
363 struct dentry *tmp;
364 struct inode *lower_dir_inode;
365
366 lower_dir_inode = lower_dir_dentry->d_inode;
367
368 tmp = d_alloc(lower_dir_dentry, name);
369 if (!tmp)
370 return ERR_PTR(-ENOMEM);
371
372 mutex_lock(&lower_dir_inode->i_mutex);
373 new_dentry = lower_dir_inode->i_op->lookup(lower_dir_inode, tmp, nd);
374 mutex_unlock(&lower_dir_inode->i_mutex);
375
376 if (!new_dentry)
377 new_dentry = tmp;
378 else
379 dput(tmp);
380
381 return new_dentry;
382}
383
384
385/**
386 * ecryptfs_lookup_one_lower
387 * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
388 * @lower_dir_dentry: lower parent directory
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500389 * @name: lower file name
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200390 *
391 * Get the lower dentry from vfs. If lower dentry does not exist yet,
392 * create it.
393 */
394static struct dentry *
395ecryptfs_lookup_one_lower(struct dentry *ecryptfs_dentry,
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500396 struct dentry *lower_dir_dentry, struct qstr *name)
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200397{
398 struct nameidata nd;
399 struct vfsmount *lower_mnt;
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200400 int err;
401
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200402 lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(
403 ecryptfs_dentry->d_parent));
404 err = vfs_path_lookup(lower_dir_dentry, lower_mnt, name->name , 0, &nd);
405 mntput(lower_mnt);
406
407 if (!err) {
408 /* we dont need the mount */
409 mntput(nd.path.mnt);
410 return nd.path.dentry;
411 }
412 if (err != -ENOENT)
413 return ERR_PTR(err);
414
415 /* create a new lower dentry */
416 return ecryptfs_new_lower_dentry(name, lower_dir_dentry, &nd);
417}
418
419/**
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800420 * ecryptfs_lookup
421 * @ecryptfs_dir_inode: The eCryptfs directory inode
422 * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
423 * @ecryptfs_nd: nameidata; may be NULL
424 *
425 * Find a file on disk. If the file does not exist, then we'll add it to the
426 * dentry cache and continue on to read it from the disk.
427 */
428static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
429 struct dentry *ecryptfs_dentry,
430 struct nameidata *ecryptfs_nd)
431{
432 char *encrypted_and_encoded_name = NULL;
Michael Halcrowa8f12862009-01-06 14:42:03 -0800433 size_t encrypted_and_encoded_name_size;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800434 struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800435 struct dentry *lower_dir_dentry, *lower_dentry;
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500436 struct qstr lower_name;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800437 int rc = 0;
438
439 ecryptfs_dentry->d_op = &ecryptfs_dops;
440 if ((ecryptfs_dentry->d_name.len == 1
441 && !strcmp(ecryptfs_dentry->d_name.name, "."))
442 || (ecryptfs_dentry->d_name.len == 2
443 && !strcmp(ecryptfs_dentry->d_name.name, ".."))) {
444 goto out_d_drop;
445 }
446 lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500447 lower_name.name = ecryptfs_dentry->d_name.name;
448 lower_name.len = ecryptfs_dentry->d_name.len;
449 lower_name.hash = ecryptfs_dentry->d_name.hash;
450 if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
451 rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
452 &lower_name);
453 if (rc < 0)
454 goto out_d_drop;
455 }
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200456 lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500457 lower_dir_dentry, &lower_name);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800458 if (IS_ERR(lower_dentry)) {
459 rc = PTR_ERR(lower_dentry);
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200460 ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
Tyler Hicks9f376222010-03-25 11:16:56 -0500461 "[%d] on lower_dentry = [%s]\n", __func__, rc,
462 encrypted_and_encoded_name);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800463 goto out_d_drop;
464 }
465 if (lower_dentry->d_inode)
466 goto lookup_and_interpose;
Tyler Hicks2aac0cf2009-03-20 02:23:57 -0500467 mount_crypt_stat = &ecryptfs_superblock_to_private(
468 ecryptfs_dentry->d_sb)->mount_crypt_stat;
469 if (!(mount_crypt_stat
470 && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800471 goto lookup_and_interpose;
472 dput(lower_dentry);
473 rc = ecryptfs_encrypt_and_encode_filename(
474 &encrypted_and_encoded_name, &encrypted_and_encoded_name_size,
Tyler Hicks2aac0cf2009-03-20 02:23:57 -0500475 NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name,
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800476 ecryptfs_dentry->d_name.len);
477 if (rc) {
478 printk(KERN_ERR "%s: Error attempting to encrypt and encode "
479 "filename; rc = [%d]\n", __func__, rc);
480 goto out_d_drop;
481 }
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500482 lower_name.name = encrypted_and_encoded_name;
483 lower_name.len = encrypted_and_encoded_name_size;
484 lower_name.hash = full_name_hash(lower_name.name, lower_name.len);
485 if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
486 rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
487 &lower_name);
488 if (rc < 0)
489 goto out_d_drop;
490 }
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200491 lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
Tyler Hicks93c3fe42010-08-25 10:26:37 -0500492 lower_dir_dentry, &lower_name);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800493 if (IS_ERR(lower_dentry)) {
494 rc = PTR_ERR(lower_dentry);
Lino Sanfilippo21edad32010-07-15 15:11:55 +0200495 ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
Tyler Hicks9f376222010-03-25 11:16:56 -0500496 "[%d] on lower_dentry = [%s]\n", __func__, rc,
497 encrypted_and_encoded_name);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800498 goto out_d_drop;
499 }
500lookup_and_interpose:
501 rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry,
Tyler Hicks2aac0cf2009-03-20 02:23:57 -0500502 ecryptfs_dir_inode,
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800503 ecryptfs_nd);
504 goto out;
505out_d_drop:
506 d_drop(ecryptfs_dentry);
507out:
508 kfree(encrypted_and_encoded_name);
Michael Halcrow237fead2006-10-04 02:16:22 -0700509 return ERR_PTR(rc);
510}
511
512static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,
513 struct dentry *new_dentry)
514{
515 struct dentry *lower_old_dentry;
516 struct dentry *lower_new_dentry;
517 struct dentry *lower_dir_dentry;
518 u64 file_size_save;
519 int rc;
520
521 file_size_save = i_size_read(old_dentry->d_inode);
522 lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
523 lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
524 dget(lower_old_dentry);
525 dget(lower_new_dentry);
526 lower_dir_dentry = lock_parent(lower_new_dentry);
527 rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
528 lower_new_dentry);
529 if (rc || !lower_new_dentry->d_inode)
530 goto out_lock;
531 rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0);
532 if (rc)
533 goto out_lock;
Tyler Hicks3a8380c2010-03-23 18:09:02 -0500534 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
535 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700536 old_dentry->d_inode->i_nlink =
537 ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink;
538 i_size_write(new_dentry->d_inode, file_size_save);
539out_lock:
540 unlock_dir(lower_dir_dentry);
541 dput(lower_new_dentry);
542 dput(lower_old_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700543 return rc;
544}
545
546static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)
547{
548 int rc = 0;
549 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
550 struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
Miklos Szeredi8dc4e372008-05-12 14:02:04 -0700551 struct dentry *lower_dir_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700552
Tyler Hicks9c2d2052009-09-22 12:52:17 -0500553 dget(lower_dentry);
Miklos Szeredi8dc4e372008-05-12 14:02:04 -0700554 lower_dir_dentry = lock_parent(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700555 rc = vfs_unlink(lower_dir_inode, lower_dentry);
556 if (rc) {
Michael Halcrowae56fb12006-11-16 01:19:30 -0800557 printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
Michael Halcrow237fead2006-10-04 02:16:22 -0700558 goto out_unlock;
559 }
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800560 fsstack_copy_attr_times(dir, lower_dir_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700561 dentry->d_inode->i_nlink =
562 ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink;
563 dentry->d_inode->i_ctime = dir->i_ctime;
Michael Halcrowcaeeeec2008-01-08 15:33:02 -0800564 d_drop(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700565out_unlock:
Miklos Szeredi8dc4e372008-05-12 14:02:04 -0700566 unlock_dir(lower_dir_dentry);
Tyler Hicks9c2d2052009-09-22 12:52:17 -0500567 dput(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700568 return rc;
569}
570
571static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
572 const char *symname)
573{
574 int rc;
575 struct dentry *lower_dentry;
576 struct dentry *lower_dir_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700577 char *encoded_symname;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800578 size_t encoded_symlen;
579 struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
Michael Halcrow237fead2006-10-04 02:16:22 -0700580
581 lower_dentry = ecryptfs_dentry_to_lower(dentry);
582 dget(lower_dentry);
583 lower_dir_dentry = lock_parent(lower_dentry);
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800584 mount_crypt_stat = &ecryptfs_superblock_to_private(
585 dir->i_sb)->mount_crypt_stat;
586 rc = ecryptfs_encrypt_and_encode_filename(&encoded_symname,
587 &encoded_symlen,
588 NULL,
589 mount_crypt_stat, symname,
590 strlen(symname));
591 if (rc)
Michael Halcrow237fead2006-10-04 02:16:22 -0700592 goto out_lock;
Michael Halcrow237fead2006-10-04 02:16:22 -0700593 rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
Miklos Szeredidb2e7472008-06-24 16:50:16 +0200594 encoded_symname);
Michael Halcrow237fead2006-10-04 02:16:22 -0700595 kfree(encoded_symname);
596 if (rc || !lower_dentry->d_inode)
597 goto out_lock;
598 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
599 if (rc)
600 goto out_lock;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800601 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
602 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700603out_lock:
604 unlock_dir(lower_dir_dentry);
605 dput(lower_dentry);
606 if (!dentry->d_inode)
607 d_drop(dentry);
608 return rc;
609}
610
611static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
612{
613 int rc;
614 struct dentry *lower_dentry;
615 struct dentry *lower_dir_dentry;
616
617 lower_dentry = ecryptfs_dentry_to_lower(dentry);
618 lower_dir_dentry = lock_parent(lower_dentry);
619 rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode);
620 if (rc || !lower_dentry->d_inode)
621 goto out;
622 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
623 if (rc)
624 goto out;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800625 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
626 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700627 dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
628out:
629 unlock_dir(lower_dir_dentry);
630 if (!dentry->d_inode)
631 d_drop(dentry);
632 return rc;
633}
634
635static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
636{
Michael Halcrow237fead2006-10-04 02:16:22 -0700637 struct dentry *lower_dentry;
Michael Halcrow237fead2006-10-04 02:16:22 -0700638 struct dentry *lower_dir_dentry;
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800639 int rc;
Michael Halcrow237fead2006-10-04 02:16:22 -0700640
641 lower_dentry = ecryptfs_dentry_to_lower(dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800642 dget(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700643 lower_dir_dentry = lock_parent(lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800644 dget(lower_dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700645 rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800646 dput(lower_dentry);
647 if (!rc)
648 d_delete(lower_dentry);
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800649 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700650 dir->i_nlink = lower_dir_dentry->d_inode->i_nlink;
651 unlock_dir(lower_dir_dentry);
652 if (!rc)
653 d_drop(dentry);
Michael Halcrow45ec4aba2006-10-30 22:07:20 -0800654 dput(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700655 return rc;
656}
657
658static int
659ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
660{
661 int rc;
662 struct dentry *lower_dentry;
663 struct dentry *lower_dir_dentry;
664
665 lower_dentry = ecryptfs_dentry_to_lower(dentry);
666 lower_dir_dentry = lock_parent(lower_dentry);
667 rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev);
668 if (rc || !lower_dentry->d_inode)
669 goto out;
Michael Halcrow391b52f2008-07-23 21:30:08 -0700670 rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
Michael Halcrow237fead2006-10-04 02:16:22 -0700671 if (rc)
672 goto out;
Josef "Jeff" Sipek0cc72dc2006-12-08 02:36:31 -0800673 fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
674 fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700675out:
676 unlock_dir(lower_dir_dentry);
677 if (!dentry->d_inode)
678 d_drop(dentry);
679 return rc;
680}
681
682static int
683ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
684 struct inode *new_dir, struct dentry *new_dentry)
685{
686 int rc;
687 struct dentry *lower_old_dentry;
688 struct dentry *lower_new_dentry;
689 struct dentry *lower_old_dir_dentry;
690 struct dentry *lower_new_dir_dentry;
Erez Zadok0d132f72009-12-05 21:17:09 -0500691 struct dentry *trap = NULL;
Michael Halcrow237fead2006-10-04 02:16:22 -0700692
693 lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
694 lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
695 dget(lower_old_dentry);
696 dget(lower_new_dentry);
697 lower_old_dir_dentry = dget_parent(lower_old_dentry);
698 lower_new_dir_dentry = dget_parent(lower_new_dentry);
Erez Zadok0d132f72009-12-05 21:17:09 -0500699 trap = lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
700 /* source should not be ancestor of target */
701 if (trap == lower_old_dentry) {
702 rc = -EINVAL;
703 goto out_lock;
704 }
705 /* target should not be ancestor of source */
706 if (trap == lower_new_dentry) {
707 rc = -ENOTEMPTY;
708 goto out_lock;
709 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700710 rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry,
711 lower_new_dir_dentry->d_inode, lower_new_dentry);
712 if (rc)
713 goto out_lock;
Erez Zadok9afa2fb2009-12-02 19:51:54 -0500714 fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700715 if (new_dir != old_dir)
Erez Zadok9afa2fb2009-12-02 19:51:54 -0500716 fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700717out_lock:
718 unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
Michael Halcrowa9083082006-11-16 01:19:16 -0800719 dput(lower_new_dentry->d_parent);
720 dput(lower_old_dentry->d_parent);
Michael Halcrow237fead2006-10-04 02:16:22 -0700721 dput(lower_new_dentry);
722 dput(lower_old_dentry);
723 return rc;
724}
725
Tyler Hicks3a60a162010-03-22 00:41:35 -0500726static int ecryptfs_readlink_lower(struct dentry *dentry, char **buf,
727 size_t *bufsiz)
Michael Halcrow237fead2006-10-04 02:16:22 -0700728{
Tyler Hicks3a60a162010-03-22 00:41:35 -0500729 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
Michael Halcrow237fead2006-10-04 02:16:22 -0700730 char *lower_buf;
Tyler Hicks3a60a162010-03-22 00:41:35 -0500731 size_t lower_bufsiz = PATH_MAX;
Michael Halcrowaddd65ad2009-01-06 14:42:00 -0800732 mm_segment_t old_fs;
733 int rc;
Michael Halcrow237fead2006-10-04 02:16:22 -0700734
Tyler Hicks3a6b42c2009-04-16 18:35:37 -0500735 lower_buf = kmalloc(lower_bufsiz, GFP_KERNEL);
Tyler Hicks3a60a162010-03-22 00:41:35 -0500736 if (!lower_buf) {
Michael Halcrow237fead2006-10-04 02:16:22 -0700737 rc = -ENOMEM;
738 goto out;
739 }
740 old_fs = get_fs();
741 set_fs(get_ds());
Michael Halcrow237fead2006-10-04 02:16:22 -0700742 rc = lower_dentry->d_inode->i_op->readlink(lower_dentry,
743 (char __user *)lower_buf,
Tyler Hicks3a6b42c2009-04-16 18:35:37 -0500744 lower_bufsiz);
Michael Halcrow237fead2006-10-04 02:16:22 -0700745 set_fs(old_fs);
Tyler Hicks3a60a162010-03-22 00:41:35 -0500746 if (rc < 0)
747 goto out;
748 lower_bufsiz = rc;
749 rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry,
750 lower_buf, lower_bufsiz);
751out:
Michael Halcrow237fead2006-10-04 02:16:22 -0700752 kfree(lower_buf);
Tyler Hicks3a60a162010-03-22 00:41:35 -0500753 return rc;
754}
755
756static int
757ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
758{
759 char *kbuf;
760 size_t kbufsiz, copied;
761 int rc;
762
763 rc = ecryptfs_readlink_lower(dentry, &kbuf, &kbufsiz);
764 if (rc)
765 goto out;
766 copied = min_t(size_t, bufsiz, kbufsiz);
767 rc = copy_to_user(buf, kbuf, copied) ? -EFAULT : copied;
768 kfree(kbuf);
769 fsstack_copy_attr_atime(dentry->d_inode,
770 ecryptfs_dentry_to_lower(dentry)->d_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -0700771out:
772 return rc;
773}
774
775static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd)
776{
777 char *buf;
778 int len = PAGE_SIZE, rc;
779 mm_segment_t old_fs;
780
781 /* Released in ecryptfs_put_link(); only release here on error */
782 buf = kmalloc(len, GFP_KERNEL);
783 if (!buf) {
OGAWA Hirofumi806892e2010-01-12 03:36:14 +0900784 buf = ERR_PTR(-ENOMEM);
Michael Halcrow237fead2006-10-04 02:16:22 -0700785 goto out;
786 }
787 old_fs = get_fs();
788 set_fs(get_ds());
Michael Halcrow237fead2006-10-04 02:16:22 -0700789 rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len);
Michael Halcrow237fead2006-10-04 02:16:22 -0700790 set_fs(old_fs);
OGAWA Hirofumi806892e2010-01-12 03:36:14 +0900791 if (rc < 0) {
792 kfree(buf);
793 buf = ERR_PTR(rc);
794 } else
Duane Griffina17d5232008-12-19 20:47:10 +0000795 buf[rc] = '\0';
Michael Halcrow237fead2006-10-04 02:16:22 -0700796out:
OGAWA Hirofumi806892e2010-01-12 03:36:14 +0900797 nd_set_link(nd, buf);
798 return NULL;
Michael Halcrow237fead2006-10-04 02:16:22 -0700799}
800
801static void
802ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
803{
OGAWA Hirofumi806892e2010-01-12 03:36:14 +0900804 char *buf = nd_get_link(nd);
805 if (!IS_ERR(buf)) {
806 /* Free the char* */
807 kfree(buf);
808 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700809}
810
811/**
812 * upper_size_to_lower_size
813 * @crypt_stat: Crypt_stat associated with file
814 * @upper_size: Size of the upper file
815 *
Michael Halcrowcc11bef2008-02-06 01:38:32 -0800816 * Calculate the required size of the lower file based on the
Michael Halcrow237fead2006-10-04 02:16:22 -0700817 * specified size of the upper file. This calculation is based on the
818 * number of headers in the underlying file and the extent size.
819 *
820 * Returns Calculated size of the lower file.
821 */
822static loff_t
823upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat,
824 loff_t upper_size)
825{
826 loff_t lower_size;
827
Tyler Hicks157f1072010-02-11 07:10:38 -0600828 lower_size = ecryptfs_lower_header_size(crypt_stat);
Michael Halcrow237fead2006-10-04 02:16:22 -0700829 if (upper_size != 0) {
830 loff_t num_extents;
831
832 num_extents = upper_size >> crypt_stat->extent_shift;
833 if (upper_size & ~crypt_stat->extent_mask)
834 num_extents++;
835 lower_size += (num_extents * crypt_stat->extent_size);
836 }
837 return lower_size;
838}
839
840/**
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500841 * truncate_upper
Michael Halcrow237fead2006-10-04 02:16:22 -0700842 * @dentry: The ecryptfs layer dentry
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500843 * @ia: Address of the ecryptfs inode's attributes
844 * @lower_ia: Address of the lower inode's attributes
Michael Halcrow237fead2006-10-04 02:16:22 -0700845 *
846 * Function to handle truncations modifying the size of the file. Note
847 * that the file sizes are interpolated. When expanding, we are simply
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500848 * writing strings of 0's out. When truncating, we truncate the upper
849 * inode and update the lower_ia according to the page index
850 * interpolations. If ATTR_SIZE is set in lower_ia->ia_valid upon return,
851 * the caller must use lower_ia in a call to notify_change() to perform
852 * the truncation of the lower inode.
Michael Halcrow237fead2006-10-04 02:16:22 -0700853 *
854 * Returns zero on success; non-zero otherwise
855 */
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500856static int truncate_upper(struct dentry *dentry, struct iattr *ia,
857 struct iattr *lower_ia)
Michael Halcrow237fead2006-10-04 02:16:22 -0700858{
859 int rc = 0;
860 struct inode *inode = dentry->d_inode;
Michael Halcrow237fead2006-10-04 02:16:22 -0700861 struct ecryptfs_crypt_stat *crypt_stat;
862 loff_t i_size = i_size_read(inode);
863 loff_t lower_size_before_truncate;
864 loff_t lower_size_after_truncate;
865
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500866 if (unlikely((ia->ia_size == i_size))) {
867 lower_ia->ia_valid &= ~ATTR_SIZE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700868 goto out;
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500869 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700870 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
Michael Halcrow237fead2006-10-04 02:16:22 -0700871 /* Switch on growing or shrinking file */
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500872 if (ia->ia_size > i_size) {
Michael Halcrow2ed92552007-10-16 01:28:10 -0700873 char zero[] = { 0x00 };
Michael Halcrow240e2df2007-06-27 14:09:44 -0700874
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500875 lower_ia->ia_valid &= ~ATTR_SIZE;
Michael Halcrow2ed92552007-10-16 01:28:10 -0700876 /* Write a single 0 at the last position of the file;
877 * this triggers code that will fill in 0's throughout
878 * the intermediate portion of the previous end of the
879 * file and the new and of the file */
Al Viro48c1e442010-05-21 11:09:58 -0400880 rc = ecryptfs_write(inode, zero,
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500881 (ia->ia_size - 1), 1);
882 } else { /* ia->ia_size < i_size_read(inode) */
883 /* We're chopping off all the pages down to the page
884 * in which ia->ia_size is located. Fill in the end of
885 * that page from (ia->ia_size & ~PAGE_CACHE_MASK) to
Michael Halcrow2ed92552007-10-16 01:28:10 -0700886 * PAGE_CACHE_SIZE with zeros. */
887 size_t num_zeros = (PAGE_CACHE_SIZE
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500888 - (ia->ia_size & ~PAGE_CACHE_MASK));
Michael Halcrow2ed92552007-10-16 01:28:10 -0700889
Christoph Hellwig2c27c652010-06-04 11:30:04 +0200890
891 /*
892 * XXX(truncate) this should really happen at the begginning
893 * of ->setattr. But the code is too messy to that as part
894 * of a larger patch. ecryptfs is also totally missing out
895 * on the inode_change_ok check at the beginning of
896 * ->setattr while would include this.
897 */
898 rc = inode_newsize_ok(inode, ia->ia_size);
899 if (rc)
900 goto out;
901
Tyler Hicks13a791b2009-04-13 15:29:27 -0500902 if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
Christoph Hellwig2c27c652010-06-04 11:30:04 +0200903 truncate_setsize(inode, ia->ia_size);
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500904 lower_ia->ia_size = ia->ia_size;
905 lower_ia->ia_valid |= ATTR_SIZE;
Al Viro48c1e442010-05-21 11:09:58 -0400906 goto out;
Tyler Hicks13a791b2009-04-13 15:29:27 -0500907 }
Michael Halcrow2ed92552007-10-16 01:28:10 -0700908 if (num_zeros) {
909 char *zeros_virt;
910
911 zeros_virt = kzalloc(num_zeros, GFP_KERNEL);
912 if (!zeros_virt) {
913 rc = -ENOMEM;
Al Viro48c1e442010-05-21 11:09:58 -0400914 goto out;
Michael Halcrow2ed92552007-10-16 01:28:10 -0700915 }
Al Viro48c1e442010-05-21 11:09:58 -0400916 rc = ecryptfs_write(inode, zeros_virt,
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500917 ia->ia_size, num_zeros);
Michael Halcrow2ed92552007-10-16 01:28:10 -0700918 kfree(zeros_virt);
Michael Halcrow5dda6992007-10-16 01:28:06 -0700919 if (rc) {
Michael Halcrow240e2df2007-06-27 14:09:44 -0700920 printk(KERN_ERR "Error attempting to zero out "
921 "the remainder of the end page on "
922 "reducing truncate; rc = [%d]\n", rc);
Al Viro48c1e442010-05-21 11:09:58 -0400923 goto out;
Michael Halcrow240e2df2007-06-27 14:09:44 -0700924 }
925 }
Christoph Hellwig2c27c652010-06-04 11:30:04 +0200926 truncate_setsize(inode, ia->ia_size);
Michael Halcrow0216f7f2007-10-16 01:28:08 -0700927 rc = ecryptfs_write_inode_size_to_metadata(inode);
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800928 if (rc) {
929 printk(KERN_ERR "Problem with "
930 "ecryptfs_write_inode_size_to_metadata; "
931 "rc = [%d]\n", rc);
Al Viro48c1e442010-05-21 11:09:58 -0400932 goto out;
Michael Halcrowdd2a3b72007-02-12 00:53:46 -0800933 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700934 /* We are reducing the size of the ecryptfs file, and need to
935 * know if we need to reduce the size of the lower file. */
936 lower_size_before_truncate =
937 upper_size_to_lower_size(crypt_stat, i_size);
938 lower_size_after_truncate =
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500939 upper_size_to_lower_size(crypt_stat, ia->ia_size);
940 if (lower_size_after_truncate < lower_size_before_truncate) {
941 lower_ia->ia_size = lower_size_after_truncate;
942 lower_ia->ia_valid |= ATTR_SIZE;
943 } else
944 lower_ia->ia_valid &= ~ATTR_SIZE;
Michael Halcrow237fead2006-10-04 02:16:22 -0700945 }
Michael Halcrow237fead2006-10-04 02:16:22 -0700946out:
947 return rc;
948}
949
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500950/**
951 * ecryptfs_truncate
952 * @dentry: The ecryptfs layer dentry
953 * @new_length: The length to expand the file to
954 *
955 * Simple function that handles the truncation of an eCryptfs inode and
956 * its corresponding lower inode.
957 *
958 * Returns zero on success; non-zero otherwise
959 */
960int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
961{
962 struct iattr ia = { .ia_valid = ATTR_SIZE, .ia_size = new_length };
963 struct iattr lower_ia = { .ia_valid = 0 };
964 int rc;
965
966 rc = truncate_upper(dentry, &ia, &lower_ia);
967 if (!rc && lower_ia.ia_valid & ATTR_SIZE) {
968 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
969
970 mutex_lock(&lower_dentry->d_inode->i_mutex);
971 rc = notify_change(lower_dentry, &lower_ia);
972 mutex_unlock(&lower_dentry->d_inode->i_mutex);
973 }
974 return rc;
975}
976
Michael Halcrow237fead2006-10-04 02:16:22 -0700977static int
Al Viroe6305c42008-07-15 21:03:57 -0400978ecryptfs_permission(struct inode *inode, int mask)
Michael Halcrow237fead2006-10-04 02:16:22 -0700979{
Al Virof419a2e2008-07-22 00:07:17 -0400980 return inode_permission(ecryptfs_inode_to_lower(inode), mask);
Michael Halcrow237fead2006-10-04 02:16:22 -0700981}
982
983/**
984 * ecryptfs_setattr
985 * @dentry: dentry handle to the inode to modify
986 * @ia: Structure with flags of what to change and values
987 *
988 * Updates the metadata of an inode. If the update is to the size
989 * i.e. truncation, then ecryptfs_truncate will handle the size modification
990 * of both the ecryptfs inode and the lower inode.
991 *
992 * All other metadata changes will be passed right to the lower filesystem,
993 * and we will just update our inode to look like the lower.
994 */
995static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
996{
997 int rc = 0;
998 struct dentry *lower_dentry;
Tyler Hicks5f3ef642009-10-14 16:18:27 -0500999 struct iattr lower_ia;
Michael Halcrow237fead2006-10-04 02:16:22 -07001000 struct inode *inode;
1001 struct inode *lower_inode;
1002 struct ecryptfs_crypt_stat *crypt_stat;
1003
1004 crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
Michael Halcrowe10f2812007-06-27 14:09:44 -07001005 if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED))
1006 ecryptfs_init_crypt_stat(crypt_stat);
Michael Halcrow237fead2006-10-04 02:16:22 -07001007 inode = dentry->d_inode;
1008 lower_inode = ecryptfs_inode_to_lower(inode);
Michael Halcrowe10f2812007-06-27 14:09:44 -07001009 lower_dentry = ecryptfs_dentry_to_lower(dentry);
1010 mutex_lock(&crypt_stat->cs_mutex);
1011 if (S_ISDIR(dentry->d_inode->i_mode))
1012 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
Michael Halcrow64ee4802007-07-19 01:47:54 -07001013 else if (S_ISREG(dentry->d_inode->i_mode)
1014 && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)
1015 || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) {
Michael Halcrowe10f2812007-06-27 14:09:44 -07001016 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
Michael Halcrowe10f2812007-06-27 14:09:44 -07001017
Michael Halcrowe10f2812007-06-27 14:09:44 -07001018 mount_crypt_stat = &ecryptfs_superblock_to_private(
1019 dentry->d_sb)->mount_crypt_stat;
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -07001020 rc = ecryptfs_read_metadata(dentry);
Michael Halcrow5dda6992007-10-16 01:28:06 -07001021 if (rc) {
Michael Halcrowe10f2812007-06-27 14:09:44 -07001022 if (!(mount_crypt_stat->flags
1023 & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) {
1024 rc = -EIO;
Michael Halcrow25bd8172008-02-06 01:38:35 -08001025 printk(KERN_WARNING "Either the lower file "
Michael Halcrowe10f2812007-06-27 14:09:44 -07001026 "is not in a valid eCryptfs format, "
Michael Halcrow25bd8172008-02-06 01:38:35 -08001027 "or the key could not be retrieved. "
1028 "Plaintext passthrough mode is not "
Michael Halcrowe10f2812007-06-27 14:09:44 -07001029 "enabled; returning -EIO\n");
Michael Halcrowe10f2812007-06-27 14:09:44 -07001030 mutex_unlock(&crypt_stat->cs_mutex);
Michael Halcrowe10f2812007-06-27 14:09:44 -07001031 goto out;
1032 }
1033 rc = 0;
1034 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
Michael Halcrowe10f2812007-06-27 14:09:44 -07001035 }
Michael Halcrowe10f2812007-06-27 14:09:44 -07001036 }
1037 mutex_unlock(&crypt_stat->cs_mutex);
Tyler Hicks5f3ef642009-10-14 16:18:27 -05001038 memcpy(&lower_ia, ia, sizeof(lower_ia));
1039 if (ia->ia_valid & ATTR_FILE)
1040 lower_ia.ia_file = ecryptfs_file_to_lower(ia->ia_file);
Michael Halcrow237fead2006-10-04 02:16:22 -07001041 if (ia->ia_valid & ATTR_SIZE) {
Tyler Hicks5f3ef642009-10-14 16:18:27 -05001042 rc = truncate_upper(dentry, ia, &lower_ia);
Michael Halcrow237fead2006-10-04 02:16:22 -07001043 if (rc < 0)
1044 goto out;
1045 }
Jeff Layton1ac564e2007-10-18 03:05:17 -07001046
1047 /*
1048 * mode change is for clearing setuid/setgid bits. Allow lower fs
1049 * to interpret this in its own way.
1050 */
Tyler Hicks5f3ef642009-10-14 16:18:27 -05001051 if (lower_ia.ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
1052 lower_ia.ia_valid &= ~ATTR_MODE;
Jeff Layton1ac564e2007-10-18 03:05:17 -07001053
Miklos Szeredi9c3580a2008-04-29 00:59:48 -07001054 mutex_lock(&lower_dentry->d_inode->i_mutex);
Tyler Hicks5f3ef642009-10-14 16:18:27 -05001055 rc = notify_change(lower_dentry, &lower_ia);
Miklos Szeredi9c3580a2008-04-29 00:59:48 -07001056 mutex_unlock(&lower_dentry->d_inode->i_mutex);
Michael Halcrow237fead2006-10-04 02:16:22 -07001057out:
Erez Zadok9afa2fb2009-12-02 19:51:54 -05001058 fsstack_copy_attr_all(inode, lower_inode);
Michael Halcrow237fead2006-10-04 02:16:22 -07001059 return rc;
1060}
1061
Tyler Hicks3a60a162010-03-22 00:41:35 -05001062int ecryptfs_getattr_link(struct vfsmount *mnt, struct dentry *dentry,
1063 struct kstat *stat)
1064{
1065 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
1066 int rc = 0;
1067
1068 mount_crypt_stat = &ecryptfs_superblock_to_private(
1069 dentry->d_sb)->mount_crypt_stat;
1070 generic_fillattr(dentry->d_inode, stat);
1071 if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) {
1072 char *target;
1073 size_t targetsiz;
1074
1075 rc = ecryptfs_readlink_lower(dentry, &target, &targetsiz);
1076 if (!rc) {
1077 kfree(target);
1078 stat->size = targetsiz;
1079 }
1080 }
1081 return rc;
1082}
1083
Tyler Hicksf8f484d2009-11-04 02:48:01 -06001084int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1085 struct kstat *stat)
1086{
1087 struct kstat lower_stat;
1088 int rc;
1089
1090 rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),
1091 ecryptfs_dentry_to_lower(dentry), &lower_stat);
1092 if (!rc) {
1093 generic_fillattr(dentry->d_inode, stat);
1094 stat->blocks = lower_stat.blocks;
1095 }
1096 return rc;
1097}
1098
Michael Halcrowdd2a3b72007-02-12 00:53:46 -08001099int
Michael Halcrow237fead2006-10-04 02:16:22 -07001100ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
1101 size_t size, int flags)
1102{
1103 int rc = 0;
1104 struct dentry *lower_dentry;
1105
1106 lower_dentry = ecryptfs_dentry_to_lower(dentry);
1107 if (!lower_dentry->d_inode->i_op->setxattr) {
Christian Pulvermachercfce08c2010-03-23 11:51:38 -05001108 rc = -EOPNOTSUPP;
Michael Halcrow237fead2006-10-04 02:16:22 -07001109 goto out;
1110 }
1111 mutex_lock(&lower_dentry->d_inode->i_mutex);
1112 rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value,
1113 size, flags);
1114 mutex_unlock(&lower_dentry->d_inode->i_mutex);
1115out:
1116 return rc;
1117}
1118
Michael Halcrowdd2a3b72007-02-12 00:53:46 -08001119ssize_t
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -07001120ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
1121 void *value, size_t size)
1122{
1123 int rc = 0;
1124
1125 if (!lower_dentry->d_inode->i_op->getxattr) {
Christian Pulvermachercfce08c2010-03-23 11:51:38 -05001126 rc = -EOPNOTSUPP;
Michael Halcrowd7cdc5f2007-10-16 01:28:10 -07001127 goto out;
1128 }
1129 mutex_lock(&lower_dentry->d_inode->i_mutex);
1130 rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value,
1131 size);
1132 mutex_unlock(&lower_dentry->d_inode->i_mutex);
1133out:
1134 return rc;
1135}
1136
Adrian Bunk7896b632008-02-06 01:38:32 -08001137static ssize_t
Michael Halcrow237fead2006-10-04 02:16:22 -07001138ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value,
1139 size_t size)
1140{
Michael Halcrow2ed92552007-10-16 01:28:10 -07001141 return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name,
1142 value, size);
Michael Halcrow237fead2006-10-04 02:16:22 -07001143}
1144
1145static ssize_t
1146ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size)
1147{
1148 int rc = 0;
1149 struct dentry *lower_dentry;
1150
1151 lower_dentry = ecryptfs_dentry_to_lower(dentry);
1152 if (!lower_dentry->d_inode->i_op->listxattr) {
Christian Pulvermachercfce08c2010-03-23 11:51:38 -05001153 rc = -EOPNOTSUPP;
Michael Halcrow237fead2006-10-04 02:16:22 -07001154 goto out;
1155 }
1156 mutex_lock(&lower_dentry->d_inode->i_mutex);
1157 rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size);
1158 mutex_unlock(&lower_dentry->d_inode->i_mutex);
1159out:
1160 return rc;
1161}
1162
1163static int ecryptfs_removexattr(struct dentry *dentry, const char *name)
1164{
1165 int rc = 0;
1166 struct dentry *lower_dentry;
1167
1168 lower_dentry = ecryptfs_dentry_to_lower(dentry);
1169 if (!lower_dentry->d_inode->i_op->removexattr) {
Christian Pulvermachercfce08c2010-03-23 11:51:38 -05001170 rc = -EOPNOTSUPP;
Michael Halcrow237fead2006-10-04 02:16:22 -07001171 goto out;
1172 }
1173 mutex_lock(&lower_dentry->d_inode->i_mutex);
1174 rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name);
1175 mutex_unlock(&lower_dentry->d_inode->i_mutex);
1176out:
1177 return rc;
1178}
1179
1180int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode)
1181{
1182 if ((ecryptfs_inode_to_lower(inode)
1183 == (struct inode *)candidate_lower_inode))
1184 return 1;
1185 else
1186 return 0;
1187}
1188
1189int ecryptfs_inode_set(struct inode *inode, void *lower_inode)
1190{
1191 ecryptfs_init_inode(inode, (struct inode *)lower_inode);
1192 return 0;
1193}
1194
Arjan van de Ven754661f2007-02-12 00:55:38 -08001195const struct inode_operations ecryptfs_symlink_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001196 .readlink = ecryptfs_readlink,
1197 .follow_link = ecryptfs_follow_link,
1198 .put_link = ecryptfs_put_link,
1199 .permission = ecryptfs_permission,
1200 .setattr = ecryptfs_setattr,
Tyler Hicks3a60a162010-03-22 00:41:35 -05001201 .getattr = ecryptfs_getattr_link,
Michael Halcrow237fead2006-10-04 02:16:22 -07001202 .setxattr = ecryptfs_setxattr,
1203 .getxattr = ecryptfs_getxattr,
1204 .listxattr = ecryptfs_listxattr,
1205 .removexattr = ecryptfs_removexattr
1206};
1207
Arjan van de Ven754661f2007-02-12 00:55:38 -08001208const struct inode_operations ecryptfs_dir_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001209 .create = ecryptfs_create,
1210 .lookup = ecryptfs_lookup,
1211 .link = ecryptfs_link,
1212 .unlink = ecryptfs_unlink,
1213 .symlink = ecryptfs_symlink,
1214 .mkdir = ecryptfs_mkdir,
1215 .rmdir = ecryptfs_rmdir,
1216 .mknod = ecryptfs_mknod,
1217 .rename = ecryptfs_rename,
1218 .permission = ecryptfs_permission,
1219 .setattr = ecryptfs_setattr,
1220 .setxattr = ecryptfs_setxattr,
1221 .getxattr = ecryptfs_getxattr,
1222 .listxattr = ecryptfs_listxattr,
1223 .removexattr = ecryptfs_removexattr
1224};
1225
Arjan van de Ven754661f2007-02-12 00:55:38 -08001226const struct inode_operations ecryptfs_main_iops = {
Michael Halcrow237fead2006-10-04 02:16:22 -07001227 .permission = ecryptfs_permission,
1228 .setattr = ecryptfs_setattr,
Tyler Hicksf8f484d2009-11-04 02:48:01 -06001229 .getattr = ecryptfs_getattr,
Michael Halcrow237fead2006-10-04 02:16:22 -07001230 .setxattr = ecryptfs_setxattr,
1231 .getxattr = ecryptfs_getxattr,
1232 .listxattr = ecryptfs_listxattr,
1233 .removexattr = ecryptfs_removexattr
1234};