Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1 | /** |
| 2 | * eCryptfs: Linux filesystem encryption layer |
| 3 | * |
| 4 | * Copyright (C) 1997-2004 Erez Zadok |
| 5 | * Copyright (C) 2001-2004 Stony Brook University |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 6 | * Copyright (C) 2004-2007 International Business Machines Corp. |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 7 | * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> |
| 8 | * Michael C. Thompsion <mcthomps@us.ibm.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License as |
| 12 | * published by the Free Software Foundation; either version 2 of the |
| 13 | * License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 23 | * 02111-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/file.h> |
| 27 | #include <linux/vmalloc.h> |
| 28 | #include <linux/pagemap.h> |
| 29 | #include <linux/dcache.h> |
| 30 | #include <linux/namei.h> |
| 31 | #include <linux/mount.h> |
| 32 | #include <linux/crypto.h> |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 33 | #include <linux/fs_stack.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
Roberto Sassu | 48b512e | 2010-10-05 18:53:45 +0200 | [diff] [blame] | 35 | #include <linux/xattr.h> |
Harvey Harrison | 0a688ad | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 36 | #include <asm/unaligned.h> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 37 | #include "ecryptfs_kernel.h" |
| 38 | |
| 39 | static struct dentry *lock_parent(struct dentry *dentry) |
| 40 | { |
| 41 | struct dentry *dir; |
| 42 | |
Miklos Szeredi | 8dc4e37 | 2008-05-12 14:02:04 -0700 | [diff] [blame] | 43 | dir = dget_parent(dentry); |
Peter Zijlstra | 908e0a8 | 2007-03-07 20:41:30 -0800 | [diff] [blame] | 44 | mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 45 | return dir; |
| 46 | } |
| 47 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 48 | static void unlock_dir(struct dentry *dir) |
| 49 | { |
| 50 | mutex_unlock(&dir->d_inode->i_mutex); |
| 51 | dput(dir); |
| 52 | } |
| 53 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 54 | static int ecryptfs_inode_test(struct inode *inode, void *lower_inode) |
| 55 | { |
| 56 | if (ecryptfs_inode_to_lower(inode) == (struct inode *)lower_inode) |
| 57 | return 1; |
| 58 | return 0; |
| 59 | } |
| 60 | |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 61 | static int ecryptfs_inode_set(struct inode *inode, void *opaque) |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 62 | { |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 63 | struct inode *lower_inode = opaque; |
| 64 | |
| 65 | ecryptfs_set_inode_lower(inode, lower_inode); |
| 66 | fsstack_copy_attr_all(inode, lower_inode); |
| 67 | /* i_size will be overwritten for encrypted regular files */ |
| 68 | fsstack_copy_inode_size(inode, lower_inode); |
| 69 | inode->i_ino = lower_inode->i_ino; |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 70 | inode->i_version++; |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 71 | inode->i_mapping->a_ops = &ecryptfs_aops; |
Thieu Le | 985ca0e | 2011-07-26 16:15:10 -0700 | [diff] [blame] | 72 | inode->i_mapping->backing_dev_info = inode->i_sb->s_bdi; |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 73 | |
| 74 | if (S_ISLNK(inode->i_mode)) |
| 75 | inode->i_op = &ecryptfs_symlink_iops; |
| 76 | else if (S_ISDIR(inode->i_mode)) |
| 77 | inode->i_op = &ecryptfs_dir_iops; |
| 78 | else |
| 79 | inode->i_op = &ecryptfs_main_iops; |
| 80 | |
| 81 | if (S_ISDIR(inode->i_mode)) |
| 82 | inode->i_fop = &ecryptfs_dir_fops; |
| 83 | else if (special_file(inode->i_mode)) |
| 84 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 85 | else |
| 86 | inode->i_fop = &ecryptfs_main_fops; |
| 87 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 88 | return 0; |
| 89 | } |
| 90 | |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 91 | static struct inode *__ecryptfs_get_inode(struct inode *lower_inode, |
| 92 | struct super_block *sb) |
| 93 | { |
| 94 | struct inode *inode; |
| 95 | |
| 96 | if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb)) |
| 97 | return ERR_PTR(-EXDEV); |
| 98 | if (!igrab(lower_inode)) |
| 99 | return ERR_PTR(-ESTALE); |
| 100 | inode = iget5_locked(sb, (unsigned long)lower_inode, |
| 101 | ecryptfs_inode_test, ecryptfs_inode_set, |
| 102 | lower_inode); |
| 103 | if (!inode) { |
| 104 | iput(lower_inode); |
| 105 | return ERR_PTR(-EACCES); |
| 106 | } |
| 107 | if (!(inode->i_state & I_NEW)) |
| 108 | iput(lower_inode); |
| 109 | |
| 110 | return inode; |
| 111 | } |
| 112 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 113 | struct inode *ecryptfs_get_inode(struct inode *lower_inode, |
| 114 | struct super_block *sb) |
| 115 | { |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 116 | struct inode *inode = __ecryptfs_get_inode(lower_inode, sb); |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 117 | |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 118 | if (!IS_ERR(inode) && (inode->i_state & I_NEW)) |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 119 | unlock_new_inode(inode); |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 120 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 121 | return inode; |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 122 | } |
| 123 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 124 | /** |
| 125 | * ecryptfs_interpose |
| 126 | * @lower_dentry: Existing dentry in the lower filesystem |
| 127 | * @dentry: ecryptfs' dentry |
| 128 | * @sb: ecryptfs's super_block |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 129 | * |
| 130 | * Interposes upper and lower dentries. |
| 131 | * |
| 132 | * Returns zero on success; non-zero otherwise |
| 133 | */ |
| 134 | static int ecryptfs_interpose(struct dentry *lower_dentry, |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 135 | struct dentry *dentry, struct super_block *sb) |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 136 | { |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 137 | struct inode *inode = ecryptfs_get_inode(lower_dentry->d_inode, sb); |
| 138 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 139 | if (IS_ERR(inode)) |
| 140 | return PTR_ERR(inode); |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 141 | d_instantiate(dentry, inode); |
| 142 | |
Tyler Hicks | c4f7907 | 2011-05-23 21:18:20 -0500 | [diff] [blame] | 143 | return 0; |
| 144 | } |
| 145 | |
Tyler Hicks | 8bc2d3c | 2012-05-22 15:09:50 -0500 | [diff] [blame] | 146 | static int ecryptfs_do_unlink(struct inode *dir, struct dentry *dentry, |
| 147 | struct inode *inode) |
| 148 | { |
| 149 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 150 | struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); |
| 151 | struct dentry *lower_dir_dentry; |
| 152 | int rc; |
| 153 | |
| 154 | dget(lower_dentry); |
| 155 | lower_dir_dentry = lock_parent(lower_dentry); |
| 156 | rc = vfs_unlink(lower_dir_inode, lower_dentry); |
| 157 | if (rc) { |
| 158 | printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc); |
| 159 | goto out_unlock; |
| 160 | } |
| 161 | fsstack_copy_attr_times(dir, lower_dir_inode); |
| 162 | set_nlink(inode, ecryptfs_inode_to_lower(inode)->i_nlink); |
| 163 | inode->i_ctime = dir->i_ctime; |
| 164 | d_drop(dentry); |
| 165 | out_unlock: |
| 166 | unlock_dir(lower_dir_dentry); |
| 167 | dput(lower_dentry); |
| 168 | return rc; |
| 169 | } |
| 170 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 171 | /** |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 172 | * ecryptfs_do_create |
| 173 | * @directory_inode: inode of the new file's dentry's parent in ecryptfs |
| 174 | * @ecryptfs_dentry: New file's dentry in ecryptfs |
| 175 | * @mode: The mode of the new file |
| 176 | * @nd: nameidata of ecryptfs' parent's dentry & vfsmount |
| 177 | * |
| 178 | * Creates the underlying file and the eCryptfs inode which will link to |
| 179 | * it. It will also update the eCryptfs directory inode to mimic the |
| 180 | * stat of the lower directory inode. |
| 181 | * |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 182 | * Returns the new eCryptfs inode on success; an ERR_PTR on error condition |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 183 | */ |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 184 | static struct inode * |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 185 | ecryptfs_do_create(struct inode *directory_inode, |
Al Viro | 175a4eb | 2011-07-26 03:30:54 -0400 | [diff] [blame] | 186 | struct dentry *ecryptfs_dentry, umode_t mode) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 187 | { |
| 188 | int rc; |
| 189 | struct dentry *lower_dentry; |
| 190 | struct dentry *lower_dir_dentry; |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 191 | struct inode *inode; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 192 | |
| 193 | lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); |
| 194 | lower_dir_dentry = lock_parent(lower_dentry); |
Hirofumi Nakagawa | 801678c | 2008-04-29 01:03:09 -0700 | [diff] [blame] | 195 | if (IS_ERR(lower_dir_dentry)) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 196 | ecryptfs_printk(KERN_ERR, "Error locking directory of " |
| 197 | "dentry\n"); |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 198 | inode = ERR_CAST(lower_dir_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 199 | goto out; |
| 200 | } |
Al Viro | 312b63f | 2012-06-10 18:09:36 -0400 | [diff] [blame] | 201 | rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, true); |
Michael Halcrow | 4981e08 | 2007-10-16 01:28:09 -0700 | [diff] [blame] | 202 | if (rc) { |
Michael Halcrow | caeeeec | 2008-01-08 15:33:02 -0800 | [diff] [blame] | 203 | printk(KERN_ERR "%s: Failure to create dentry in lower fs; " |
Harvey Harrison | 18d1dbf | 2008-04-29 00:59:48 -0700 | [diff] [blame] | 204 | "rc = [%d]\n", __func__, rc); |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 205 | inode = ERR_PTR(rc); |
Michael Halcrow | caeeeec | 2008-01-08 15:33:02 -0800 | [diff] [blame] | 206 | goto out_lock; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 207 | } |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 208 | inode = __ecryptfs_get_inode(lower_dentry->d_inode, |
| 209 | directory_inode->i_sb); |
Tyler Hicks | 8bc2d3c | 2012-05-22 15:09:50 -0500 | [diff] [blame] | 210 | if (IS_ERR(inode)) { |
| 211 | vfs_unlink(lower_dir_dentry->d_inode, lower_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 212 | goto out_lock; |
Tyler Hicks | 8bc2d3c | 2012-05-22 15:09:50 -0500 | [diff] [blame] | 213 | } |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 214 | fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode); |
| 215 | fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 216 | out_lock: |
| 217 | unlock_dir(lower_dir_dentry); |
| 218 | out: |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 219 | return inode; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | /** |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 223 | * ecryptfs_initialize_file |
| 224 | * |
| 225 | * Cause the file to be changed from a basic empty file to an ecryptfs |
| 226 | * file with a header and first data page. |
| 227 | * |
| 228 | * Returns zero on success |
| 229 | */ |
Tyler Hicks | e3ccaa9 | 2012-06-20 23:50:59 -0700 | [diff] [blame] | 230 | int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry, |
| 231 | struct inode *ecryptfs_inode) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 232 | { |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 233 | struct ecryptfs_crypt_stat *crypt_stat = |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 234 | &ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 235 | int rc = 0; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 236 | |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 237 | if (S_ISDIR(ecryptfs_inode->i_mode)) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 238 | ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 239 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 240 | goto out; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 241 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 242 | ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n"); |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 243 | rc = ecryptfs_new_file_context(ecryptfs_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 244 | if (rc) { |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 245 | ecryptfs_printk(KERN_ERR, "Error creating new file " |
| 246 | "context; rc = [%d]\n", rc); |
| 247 | goto out; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 248 | } |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 249 | rc = ecryptfs_get_lower_file(ecryptfs_dentry, ecryptfs_inode); |
Roberto Sassu | 2799289 | 2010-11-03 11:11:28 +0100 | [diff] [blame] | 250 | if (rc) { |
| 251 | printk(KERN_ERR "%s: Error attempting to initialize " |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 252 | "the lower file for the dentry with name " |
Roberto Sassu | 2799289 | 2010-11-03 11:11:28 +0100 | [diff] [blame] | 253 | "[%s]; rc = [%d]\n", __func__, |
| 254 | ecryptfs_dentry->d_name.name, rc); |
| 255 | goto out; |
Michael Halcrow | 391b52f | 2008-07-23 21:30:08 -0700 | [diff] [blame] | 256 | } |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 257 | rc = ecryptfs_write_metadata(ecryptfs_dentry, ecryptfs_inode); |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 258 | if (rc) |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 259 | printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc); |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 260 | ecryptfs_put_lower_file(ecryptfs_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 261 | out: |
| 262 | return rc; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * ecryptfs_create |
| 267 | * @dir: The inode of the directory in which to create the file. |
| 268 | * @dentry: The eCryptfs dentry |
| 269 | * @mode: The mode of the new file. |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 270 | * |
| 271 | * Creates a new file. |
| 272 | * |
| 273 | * Returns zero on success; non-zero on error condition |
| 274 | */ |
| 275 | static int |
| 276 | ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 277 | umode_t mode, bool excl) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 278 | { |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 279 | struct inode *ecryptfs_inode; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 280 | int rc; |
| 281 | |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 282 | ecryptfs_inode = ecryptfs_do_create(directory_inode, ecryptfs_dentry, |
| 283 | mode); |
| 284 | if (unlikely(IS_ERR(ecryptfs_inode))) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 285 | ecryptfs_printk(KERN_WARNING, "Failed to create file in" |
| 286 | "lower filesystem\n"); |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 287 | rc = PTR_ERR(ecryptfs_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 288 | goto out; |
| 289 | } |
| 290 | /* At this point, a file exists on "disk"; we need to make sure |
| 291 | * that this on disk file is prepared to be an ecryptfs file */ |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 292 | rc = ecryptfs_initialize_file(ecryptfs_dentry, ecryptfs_inode); |
| 293 | if (rc) { |
Tyler Hicks | 8bc2d3c | 2012-05-22 15:09:50 -0500 | [diff] [blame] | 294 | ecryptfs_do_unlink(directory_inode, ecryptfs_dentry, |
| 295 | ecryptfs_inode); |
| 296 | make_bad_inode(ecryptfs_inode); |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 297 | unlock_new_inode(ecryptfs_inode); |
| 298 | iput(ecryptfs_inode); |
| 299 | goto out; |
| 300 | } |
Tyler Hicks | b59db43 | 2011-11-21 17:31:02 -0600 | [diff] [blame] | 301 | unlock_new_inode(ecryptfs_inode); |
Al Viro | 8fc37ec | 2012-07-19 09:18:15 +0400 | [diff] [blame] | 302 | d_instantiate(ecryptfs_dentry, ecryptfs_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 303 | out: |
| 304 | return rc; |
| 305 | } |
| 306 | |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 307 | static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 308 | { |
Tyler Hicks | 2aac0cf | 2009-03-20 02:23:57 -0500 | [diff] [blame] | 309 | struct ecryptfs_crypt_stat *crypt_stat; |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 310 | int rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 311 | |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 312 | rc = ecryptfs_get_lower_file(dentry, inode); |
Roberto Sassu | 2799289 | 2010-11-03 11:11:28 +0100 | [diff] [blame] | 313 | if (rc) { |
| 314 | printk(KERN_ERR "%s: Error attempting to initialize " |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 315 | "the lower file for the dentry with name " |
Roberto Sassu | 2799289 | 2010-11-03 11:11:28 +0100 | [diff] [blame] | 316 | "[%s]; rc = [%d]\n", __func__, |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 317 | dentry->d_name.name, rc); |
| 318 | return rc; |
Michael Halcrow | 391b52f | 2008-07-23 21:30:08 -0700 | [diff] [blame] | 319 | } |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 320 | |
Tyler Hicks | 3b06b3e | 2011-05-24 03:49:02 -0500 | [diff] [blame] | 321 | crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; |
Tyler Hicks | 2aac0cf | 2009-03-20 02:23:57 -0500 | [diff] [blame] | 322 | /* TODO: lock for crypt_stat comparison */ |
| 323 | if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 324 | ecryptfs_set_default_sizes(crypt_stat); |
| 325 | |
| 326 | rc = ecryptfs_read_and_validate_header_region(inode); |
| 327 | ecryptfs_put_lower_file(inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 328 | if (rc) { |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 329 | rc = ecryptfs_read_and_validate_xattr_region(dentry, inode); |
| 330 | if (!rc) |
| 331 | crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 332 | } |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 333 | |
| 334 | /* Must return 0 to allow non-eCryptfs files to be looked up, too */ |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * ecryptfs_lookup_interpose - Dentry interposition for a lookup |
| 340 | */ |
| 341 | static int ecryptfs_lookup_interpose(struct dentry *dentry, |
| 342 | struct dentry *lower_dentry, |
| 343 | struct inode *dir_inode) |
| 344 | { |
| 345 | struct inode *inode, *lower_inode = lower_dentry->d_inode; |
| 346 | struct ecryptfs_dentry_info *dentry_info; |
| 347 | struct vfsmount *lower_mnt; |
| 348 | int rc = 0; |
| 349 | |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 350 | dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL); |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 351 | if (!dentry_info) { |
| 352 | printk(KERN_ERR "%s: Out of memory whilst attempting " |
| 353 | "to allocate ecryptfs_dentry_info struct\n", |
| 354 | __func__); |
| 355 | dput(lower_dentry); |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 356 | return -ENOMEM; |
| 357 | } |
Al Viro | 0b1d901 | 2012-07-20 12:09:19 +0400 | [diff] [blame] | 358 | |
| 359 | lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); |
| 360 | fsstack_copy_attr_atime(dir_inode, lower_dentry->d_parent->d_inode); |
Al Viro | 84d08fa | 2013-07-05 18:59:33 +0400 | [diff] [blame] | 361 | BUG_ON(!d_count(lower_dentry)); |
Al Viro | 0b1d901 | 2012-07-20 12:09:19 +0400 | [diff] [blame] | 362 | |
| 363 | ecryptfs_set_dentry_private(dentry, dentry_info); |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 364 | ecryptfs_set_dentry_lower(dentry, lower_dentry); |
| 365 | ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); |
| 366 | |
| 367 | if (!lower_dentry->d_inode) { |
| 368 | /* We want to add because we couldn't find in lower */ |
| 369 | d_add(dentry, NULL); |
| 370 | return 0; |
| 371 | } |
| 372 | inode = __ecryptfs_get_inode(lower_inode, dir_inode->i_sb); |
| 373 | if (IS_ERR(inode)) { |
| 374 | printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n", |
| 375 | __func__, PTR_ERR(inode)); |
| 376 | return PTR_ERR(inode); |
| 377 | } |
| 378 | if (S_ISREG(inode->i_mode)) { |
| 379 | rc = ecryptfs_i_size_read(dentry, inode); |
| 380 | if (rc) { |
| 381 | make_bad_inode(inode); |
| 382 | return rc; |
| 383 | } |
| 384 | } |
| 385 | |
Tyler Hicks | 3b06b3e | 2011-05-24 03:49:02 -0500 | [diff] [blame] | 386 | if (inode->i_state & I_NEW) |
| 387 | unlock_new_inode(inode); |
Tyler Hicks | 778aeb4 | 2011-05-24 04:56:23 -0500 | [diff] [blame] | 388 | d_add(dentry, inode); |
| 389 | |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 390 | return rc; |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * ecryptfs_lookup |
| 395 | * @ecryptfs_dir_inode: The eCryptfs directory inode |
| 396 | * @ecryptfs_dentry: The eCryptfs dentry that we are looking up |
| 397 | * @ecryptfs_nd: nameidata; may be NULL |
| 398 | * |
| 399 | * Find a file on disk. If the file does not exist, then we'll add it to the |
| 400 | * dentry cache and continue on to read it from the disk. |
| 401 | */ |
| 402 | static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, |
| 403 | struct dentry *ecryptfs_dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 404 | unsigned int flags) |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 405 | { |
| 406 | char *encrypted_and_encoded_name = NULL; |
Michael Halcrow | a8f1286 | 2009-01-06 14:42:03 -0800 | [diff] [blame] | 407 | size_t encrypted_and_encoded_name_size; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 408 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 409 | struct dentry *lower_dir_dentry, *lower_dentry; |
| 410 | int rc = 0; |
| 411 | |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 412 | lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent); |
Tyler Hicks | 8787c7a | 2011-02-17 18:51:24 -0600 | [diff] [blame] | 413 | mutex_lock(&lower_dir_dentry->d_inode->i_mutex); |
| 414 | lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name, |
| 415 | lower_dir_dentry, |
| 416 | ecryptfs_dentry->d_name.len); |
| 417 | mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 418 | if (IS_ERR(lower_dentry)) { |
| 419 | rc = PTR_ERR(lower_dentry); |
Tyler Hicks | 8787c7a | 2011-02-17 18:51:24 -0600 | [diff] [blame] | 420 | ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " |
Tyler Hicks | 9f37622 | 2010-03-25 11:16:56 -0500 | [diff] [blame] | 421 | "[%d] on lower_dentry = [%s]\n", __func__, rc, |
Al Viro | bc65a12 | 2012-07-20 12:03:41 +0400 | [diff] [blame] | 422 | ecryptfs_dentry->d_name.name); |
| 423 | goto out; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 424 | } |
| 425 | if (lower_dentry->d_inode) |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 426 | goto interpose; |
Tyler Hicks | 2aac0cf | 2009-03-20 02:23:57 -0500 | [diff] [blame] | 427 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
| 428 | ecryptfs_dentry->d_sb)->mount_crypt_stat; |
| 429 | if (!(mount_crypt_stat |
| 430 | && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES))) |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 431 | goto interpose; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 432 | dput(lower_dentry); |
| 433 | rc = ecryptfs_encrypt_and_encode_filename( |
| 434 | &encrypted_and_encoded_name, &encrypted_and_encoded_name_size, |
Tyler Hicks | 2aac0cf | 2009-03-20 02:23:57 -0500 | [diff] [blame] | 435 | NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name, |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 436 | ecryptfs_dentry->d_name.len); |
| 437 | if (rc) { |
| 438 | printk(KERN_ERR "%s: Error attempting to encrypt and encode " |
| 439 | "filename; rc = [%d]\n", __func__, rc); |
Al Viro | bc65a12 | 2012-07-20 12:03:41 +0400 | [diff] [blame] | 440 | goto out; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 441 | } |
Tyler Hicks | 8787c7a | 2011-02-17 18:51:24 -0600 | [diff] [blame] | 442 | mutex_lock(&lower_dir_dentry->d_inode->i_mutex); |
| 443 | lower_dentry = lookup_one_len(encrypted_and_encoded_name, |
| 444 | lower_dir_dentry, |
| 445 | encrypted_and_encoded_name_size); |
| 446 | mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 447 | if (IS_ERR(lower_dentry)) { |
| 448 | rc = PTR_ERR(lower_dentry); |
Tyler Hicks | 8787c7a | 2011-02-17 18:51:24 -0600 | [diff] [blame] | 449 | ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " |
Tyler Hicks | 9f37622 | 2010-03-25 11:16:56 -0500 | [diff] [blame] | 450 | "[%d] on lower_dentry = [%s]\n", __func__, rc, |
| 451 | encrypted_and_encoded_name); |
Al Viro | bc65a12 | 2012-07-20 12:03:41 +0400 | [diff] [blame] | 452 | goto out; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 453 | } |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 454 | interpose: |
| 455 | rc = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry, |
| 456 | ecryptfs_dir_inode); |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 457 | out: |
| 458 | kfree(encrypted_and_encoded_name); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 459 | return ERR_PTR(rc); |
| 460 | } |
| 461 | |
| 462 | static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, |
| 463 | struct dentry *new_dentry) |
| 464 | { |
| 465 | struct dentry *lower_old_dentry; |
| 466 | struct dentry *lower_new_dentry; |
| 467 | struct dentry *lower_dir_dentry; |
| 468 | u64 file_size_save; |
| 469 | int rc; |
| 470 | |
| 471 | file_size_save = i_size_read(old_dentry->d_inode); |
| 472 | lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); |
| 473 | lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); |
| 474 | dget(lower_old_dentry); |
| 475 | dget(lower_new_dentry); |
| 476 | lower_dir_dentry = lock_parent(lower_new_dentry); |
| 477 | rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, |
| 478 | lower_new_dentry); |
| 479 | if (rc || !lower_new_dentry->d_inode) |
| 480 | goto out_lock; |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 481 | rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 482 | if (rc) |
| 483 | goto out_lock; |
Tyler Hicks | 3a8380c | 2010-03-23 18:09:02 -0500 | [diff] [blame] | 484 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
| 485 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 486 | set_nlink(old_dentry->d_inode, |
| 487 | ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 488 | i_size_write(new_dentry->d_inode, file_size_save); |
| 489 | out_lock: |
| 490 | unlock_dir(lower_dir_dentry); |
| 491 | dput(lower_new_dentry); |
| 492 | dput(lower_old_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 493 | return rc; |
| 494 | } |
| 495 | |
| 496 | static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) |
| 497 | { |
Tyler Hicks | 8bc2d3c | 2012-05-22 15:09:50 -0500 | [diff] [blame] | 498 | return ecryptfs_do_unlink(dir, dentry, dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, |
| 502 | const char *symname) |
| 503 | { |
| 504 | int rc; |
| 505 | struct dentry *lower_dentry; |
| 506 | struct dentry *lower_dir_dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 507 | char *encoded_symname; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 508 | size_t encoded_symlen; |
| 509 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 510 | |
| 511 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 512 | dget(lower_dentry); |
| 513 | lower_dir_dentry = lock_parent(lower_dentry); |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 514 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
| 515 | dir->i_sb)->mount_crypt_stat; |
| 516 | rc = ecryptfs_encrypt_and_encode_filename(&encoded_symname, |
| 517 | &encoded_symlen, |
| 518 | NULL, |
| 519 | mount_crypt_stat, symname, |
| 520 | strlen(symname)); |
| 521 | if (rc) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 522 | goto out_lock; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 523 | rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, |
Miklos Szeredi | db2e747 | 2008-06-24 16:50:16 +0200 | [diff] [blame] | 524 | encoded_symname); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 525 | kfree(encoded_symname); |
| 526 | if (rc || !lower_dentry->d_inode) |
| 527 | goto out_lock; |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 528 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 529 | if (rc) |
| 530 | goto out_lock; |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 531 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
| 532 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 533 | out_lock: |
| 534 | unlock_dir(lower_dir_dentry); |
| 535 | dput(lower_dentry); |
| 536 | if (!dentry->d_inode) |
| 537 | d_drop(dentry); |
| 538 | return rc; |
| 539 | } |
| 540 | |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 541 | static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 542 | { |
| 543 | int rc; |
| 544 | struct dentry *lower_dentry; |
| 545 | struct dentry *lower_dir_dentry; |
| 546 | |
| 547 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 548 | lower_dir_dentry = lock_parent(lower_dentry); |
| 549 | rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); |
| 550 | if (rc || !lower_dentry->d_inode) |
| 551 | goto out; |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 552 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 553 | if (rc) |
| 554 | goto out; |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 555 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
| 556 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 557 | set_nlink(dir, lower_dir_dentry->d_inode->i_nlink); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 558 | out: |
| 559 | unlock_dir(lower_dir_dentry); |
| 560 | if (!dentry->d_inode) |
| 561 | d_drop(dentry); |
| 562 | return rc; |
| 563 | } |
| 564 | |
| 565 | static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) |
| 566 | { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 567 | struct dentry *lower_dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 568 | struct dentry *lower_dir_dentry; |
Michael Halcrow | 45ec4aba | 2006-10-30 22:07:20 -0800 | [diff] [blame] | 569 | int rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 570 | |
| 571 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
Michael Halcrow | 45ec4aba | 2006-10-30 22:07:20 -0800 | [diff] [blame] | 572 | dget(dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 573 | lower_dir_dentry = lock_parent(lower_dentry); |
Michael Halcrow | 45ec4aba | 2006-10-30 22:07:20 -0800 | [diff] [blame] | 574 | dget(lower_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 575 | rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); |
Michael Halcrow | 45ec4aba | 2006-10-30 22:07:20 -0800 | [diff] [blame] | 576 | dput(lower_dentry); |
Tyler Hicks | 0785055 | 2011-04-29 16:26:27 -0500 | [diff] [blame] | 577 | if (!rc && dentry->d_inode) |
| 578 | clear_nlink(dentry->d_inode); |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 579 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 580 | set_nlink(dir, lower_dir_dentry->d_inode->i_nlink); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 581 | unlock_dir(lower_dir_dentry); |
| 582 | if (!rc) |
| 583 | d_drop(dentry); |
Michael Halcrow | 45ec4aba | 2006-10-30 22:07:20 -0800 | [diff] [blame] | 584 | dput(dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 585 | return rc; |
| 586 | } |
| 587 | |
| 588 | static int |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 589 | ecryptfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 590 | { |
| 591 | int rc; |
| 592 | struct dentry *lower_dentry; |
| 593 | struct dentry *lower_dir_dentry; |
| 594 | |
| 595 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 596 | lower_dir_dentry = lock_parent(lower_dentry); |
| 597 | rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); |
| 598 | if (rc || !lower_dentry->d_inode) |
| 599 | goto out; |
Tyler Hicks | 5ccf920 | 2011-05-24 02:16:51 -0500 | [diff] [blame] | 600 | rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 601 | if (rc) |
| 602 | goto out; |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 603 | fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); |
| 604 | fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 605 | out: |
| 606 | unlock_dir(lower_dir_dentry); |
| 607 | if (!dentry->d_inode) |
| 608 | d_drop(dentry); |
| 609 | return rc; |
| 610 | } |
| 611 | |
| 612 | static int |
| 613 | ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 614 | struct inode *new_dir, struct dentry *new_dentry) |
| 615 | { |
| 616 | int rc; |
| 617 | struct dentry *lower_old_dentry; |
| 618 | struct dentry *lower_new_dentry; |
| 619 | struct dentry *lower_old_dir_dentry; |
| 620 | struct dentry *lower_new_dir_dentry; |
Erez Zadok | 0d132f7 | 2009-12-05 21:17:09 -0500 | [diff] [blame] | 621 | struct dentry *trap = NULL; |
Tyler Hicks | 8335eaf | 2012-09-13 12:00:56 -0700 | [diff] [blame] | 622 | struct inode *target_inode; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 623 | |
| 624 | lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); |
| 625 | lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); |
| 626 | dget(lower_old_dentry); |
| 627 | dget(lower_new_dentry); |
| 628 | lower_old_dir_dentry = dget_parent(lower_old_dentry); |
| 629 | lower_new_dir_dentry = dget_parent(lower_new_dentry); |
Tyler Hicks | 8335eaf | 2012-09-13 12:00:56 -0700 | [diff] [blame] | 630 | target_inode = new_dentry->d_inode; |
Erez Zadok | 0d132f7 | 2009-12-05 21:17:09 -0500 | [diff] [blame] | 631 | trap = lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); |
| 632 | /* source should not be ancestor of target */ |
| 633 | if (trap == lower_old_dentry) { |
| 634 | rc = -EINVAL; |
| 635 | goto out_lock; |
| 636 | } |
| 637 | /* target should not be ancestor of source */ |
| 638 | if (trap == lower_new_dentry) { |
| 639 | rc = -ENOTEMPTY; |
| 640 | goto out_lock; |
| 641 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 642 | rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, |
| 643 | lower_new_dir_dentry->d_inode, lower_new_dentry); |
| 644 | if (rc) |
| 645 | goto out_lock; |
Tyler Hicks | 8335eaf | 2012-09-13 12:00:56 -0700 | [diff] [blame] | 646 | if (target_inode) |
| 647 | fsstack_copy_attr_all(target_inode, |
| 648 | ecryptfs_inode_to_lower(target_inode)); |
Erez Zadok | 9afa2fb | 2009-12-02 19:51:54 -0500 | [diff] [blame] | 649 | fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 650 | if (new_dir != old_dir) |
Erez Zadok | 9afa2fb | 2009-12-02 19:51:54 -0500 | [diff] [blame] | 651 | fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 652 | out_lock: |
| 653 | unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); |
Tyler Hicks | dd55c89 | 2011-04-12 11:23:09 -0500 | [diff] [blame] | 654 | dput(lower_new_dir_dentry); |
| 655 | dput(lower_old_dir_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 656 | dput(lower_new_dentry); |
| 657 | dput(lower_old_dentry); |
| 658 | return rc; |
| 659 | } |
| 660 | |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 661 | static int ecryptfs_readlink_lower(struct dentry *dentry, char **buf, |
| 662 | size_t *bufsiz) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 663 | { |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 664 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 665 | char *lower_buf; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 666 | mm_segment_t old_fs; |
| 667 | int rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 668 | |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 669 | lower_buf = kmalloc(PATH_MAX, GFP_KERNEL); |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 670 | if (!lower_buf) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 671 | rc = -ENOMEM; |
| 672 | goto out; |
| 673 | } |
| 674 | old_fs = get_fs(); |
| 675 | set_fs(get_ds()); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 676 | rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, |
| 677 | (char __user *)lower_buf, |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 678 | PATH_MAX); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 679 | set_fs(old_fs); |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 680 | if (rc < 0) |
| 681 | goto out; |
Al Viro | 0747fdb | 2013-06-16 20:05:38 +0400 | [diff] [blame] | 682 | rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry->d_sb, |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 683 | lower_buf, rc); |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 684 | out: |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 685 | kfree(lower_buf); |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 686 | return rc; |
| 687 | } |
| 688 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 689 | static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 690 | { |
| 691 | char *buf; |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 692 | size_t len = PATH_MAX; |
| 693 | int rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 694 | |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 695 | rc = ecryptfs_readlink_lower(dentry, &buf, &len); |
| 696 | if (rc) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 697 | goto out; |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 698 | fsstack_copy_attr_atime(dentry->d_inode, |
| 699 | ecryptfs_dentry_to_lower(dentry)->d_inode); |
| 700 | buf[len] = '\0'; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 701 | out: |
OGAWA Hirofumi | 806892e | 2010-01-12 03:36:14 +0900 | [diff] [blame] | 702 | nd_set_link(nd, buf); |
| 703 | return NULL; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 704 | } |
| 705 | |
| 706 | static void |
| 707 | ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) |
| 708 | { |
OGAWA Hirofumi | 806892e | 2010-01-12 03:36:14 +0900 | [diff] [blame] | 709 | char *buf = nd_get_link(nd); |
| 710 | if (!IS_ERR(buf)) { |
| 711 | /* Free the char* */ |
| 712 | kfree(buf); |
| 713 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 714 | } |
| 715 | |
| 716 | /** |
| 717 | * upper_size_to_lower_size |
| 718 | * @crypt_stat: Crypt_stat associated with file |
| 719 | * @upper_size: Size of the upper file |
| 720 | * |
Michael Halcrow | cc11bef | 2008-02-06 01:38:32 -0800 | [diff] [blame] | 721 | * Calculate the required size of the lower file based on the |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 722 | * specified size of the upper file. This calculation is based on the |
| 723 | * number of headers in the underlying file and the extent size. |
| 724 | * |
| 725 | * Returns Calculated size of the lower file. |
| 726 | */ |
| 727 | static loff_t |
| 728 | upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, |
| 729 | loff_t upper_size) |
| 730 | { |
| 731 | loff_t lower_size; |
| 732 | |
Tyler Hicks | 157f107 | 2010-02-11 07:10:38 -0600 | [diff] [blame] | 733 | lower_size = ecryptfs_lower_header_size(crypt_stat); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 734 | if (upper_size != 0) { |
| 735 | loff_t num_extents; |
| 736 | |
| 737 | num_extents = upper_size >> crypt_stat->extent_shift; |
| 738 | if (upper_size & ~crypt_stat->extent_mask) |
| 739 | num_extents++; |
| 740 | lower_size += (num_extents * crypt_stat->extent_size); |
| 741 | } |
| 742 | return lower_size; |
| 743 | } |
| 744 | |
| 745 | /** |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 746 | * truncate_upper |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 747 | * @dentry: The ecryptfs layer dentry |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 748 | * @ia: Address of the ecryptfs inode's attributes |
| 749 | * @lower_ia: Address of the lower inode's attributes |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 750 | * |
| 751 | * Function to handle truncations modifying the size of the file. Note |
| 752 | * that the file sizes are interpolated. When expanding, we are simply |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 753 | * writing strings of 0's out. When truncating, we truncate the upper |
| 754 | * inode and update the lower_ia according to the page index |
| 755 | * interpolations. If ATTR_SIZE is set in lower_ia->ia_valid upon return, |
| 756 | * the caller must use lower_ia in a call to notify_change() to perform |
| 757 | * the truncation of the lower inode. |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 758 | * |
| 759 | * Returns zero on success; non-zero otherwise |
| 760 | */ |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 761 | static int truncate_upper(struct dentry *dentry, struct iattr *ia, |
| 762 | struct iattr *lower_ia) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 763 | { |
| 764 | int rc = 0; |
| 765 | struct inode *inode = dentry->d_inode; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 766 | struct ecryptfs_crypt_stat *crypt_stat; |
| 767 | loff_t i_size = i_size_read(inode); |
| 768 | loff_t lower_size_before_truncate; |
| 769 | loff_t lower_size_after_truncate; |
| 770 | |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 771 | if (unlikely((ia->ia_size == i_size))) { |
| 772 | lower_ia->ia_valid &= ~ATTR_SIZE; |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 773 | return 0; |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 774 | } |
Tyler Hicks | 3b06b3e | 2011-05-24 03:49:02 -0500 | [diff] [blame] | 775 | rc = ecryptfs_get_lower_file(dentry, inode); |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 776 | if (rc) |
| 777 | return rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 778 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 779 | /* Switch on growing or shrinking file */ |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 780 | if (ia->ia_size > i_size) { |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 781 | char zero[] = { 0x00 }; |
Michael Halcrow | 240e2df | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 782 | |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 783 | lower_ia->ia_valid &= ~ATTR_SIZE; |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 784 | /* Write a single 0 at the last position of the file; |
| 785 | * this triggers code that will fill in 0's throughout |
| 786 | * the intermediate portion of the previous end of the |
| 787 | * file and the new and of the file */ |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 788 | rc = ecryptfs_write(inode, zero, |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 789 | (ia->ia_size - 1), 1); |
| 790 | } else { /* ia->ia_size < i_size_read(inode) */ |
| 791 | /* We're chopping off all the pages down to the page |
| 792 | * in which ia->ia_size is located. Fill in the end of |
| 793 | * that page from (ia->ia_size & ~PAGE_CACHE_MASK) to |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 794 | * PAGE_CACHE_SIZE with zeros. */ |
| 795 | size_t num_zeros = (PAGE_CACHE_SIZE |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 796 | - (ia->ia_size & ~PAGE_CACHE_MASK)); |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 797 | |
Tyler Hicks | 13a791b | 2009-04-13 15:29:27 -0500 | [diff] [blame] | 798 | if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { |
Christoph Hellwig | 2c27c65 | 2010-06-04 11:30:04 +0200 | [diff] [blame] | 799 | truncate_setsize(inode, ia->ia_size); |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 800 | lower_ia->ia_size = ia->ia_size; |
| 801 | lower_ia->ia_valid |= ATTR_SIZE; |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 802 | goto out; |
Tyler Hicks | 13a791b | 2009-04-13 15:29:27 -0500 | [diff] [blame] | 803 | } |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 804 | if (num_zeros) { |
| 805 | char *zeros_virt; |
| 806 | |
| 807 | zeros_virt = kzalloc(num_zeros, GFP_KERNEL); |
| 808 | if (!zeros_virt) { |
| 809 | rc = -ENOMEM; |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 810 | goto out; |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 811 | } |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 812 | rc = ecryptfs_write(inode, zeros_virt, |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 813 | ia->ia_size, num_zeros); |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 814 | kfree(zeros_virt); |
Michael Halcrow | 5dda699 | 2007-10-16 01:28:06 -0700 | [diff] [blame] | 815 | if (rc) { |
Michael Halcrow | 240e2df | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 816 | printk(KERN_ERR "Error attempting to zero out " |
| 817 | "the remainder of the end page on " |
| 818 | "reducing truncate; rc = [%d]\n", rc); |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 819 | goto out; |
Michael Halcrow | 240e2df | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 820 | } |
| 821 | } |
Christoph Hellwig | 2c27c65 | 2010-06-04 11:30:04 +0200 | [diff] [blame] | 822 | truncate_setsize(inode, ia->ia_size); |
Michael Halcrow | 0216f7f | 2007-10-16 01:28:08 -0700 | [diff] [blame] | 823 | rc = ecryptfs_write_inode_size_to_metadata(inode); |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 824 | if (rc) { |
| 825 | printk(KERN_ERR "Problem with " |
| 826 | "ecryptfs_write_inode_size_to_metadata; " |
| 827 | "rc = [%d]\n", rc); |
Al Viro | 48c1e44 | 2010-05-21 11:09:58 -0400 | [diff] [blame] | 828 | goto out; |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 829 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 830 | /* We are reducing the size of the ecryptfs file, and need to |
| 831 | * know if we need to reduce the size of the lower file. */ |
| 832 | lower_size_before_truncate = |
| 833 | upper_size_to_lower_size(crypt_stat, i_size); |
| 834 | lower_size_after_truncate = |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 835 | upper_size_to_lower_size(crypt_stat, ia->ia_size); |
| 836 | if (lower_size_after_truncate < lower_size_before_truncate) { |
| 837 | lower_ia->ia_size = lower_size_after_truncate; |
| 838 | lower_ia->ia_valid |= ATTR_SIZE; |
| 839 | } else |
| 840 | lower_ia->ia_valid &= ~ATTR_SIZE; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 841 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 842 | out: |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 843 | ecryptfs_put_lower_file(inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 844 | return rc; |
| 845 | } |
| 846 | |
Tyler Hicks | a261a03 | 2012-01-19 20:33:44 -0600 | [diff] [blame] | 847 | static int ecryptfs_inode_newsize_ok(struct inode *inode, loff_t offset) |
| 848 | { |
| 849 | struct ecryptfs_crypt_stat *crypt_stat; |
| 850 | loff_t lower_oldsize, lower_newsize; |
| 851 | |
| 852 | crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; |
| 853 | lower_oldsize = upper_size_to_lower_size(crypt_stat, |
| 854 | i_size_read(inode)); |
| 855 | lower_newsize = upper_size_to_lower_size(crypt_stat, offset); |
| 856 | if (lower_newsize > lower_oldsize) { |
| 857 | /* |
| 858 | * The eCryptfs inode and the new *lower* size are mixed here |
| 859 | * because we may not have the lower i_mutex held and/or it may |
| 860 | * not be appropriate to call inode_newsize_ok() with inodes |
| 861 | * from other filesystems. |
| 862 | */ |
| 863 | return inode_newsize_ok(inode, lower_newsize); |
| 864 | } |
| 865 | |
| 866 | return 0; |
| 867 | } |
| 868 | |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 869 | /** |
| 870 | * ecryptfs_truncate |
| 871 | * @dentry: The ecryptfs layer dentry |
| 872 | * @new_length: The length to expand the file to |
| 873 | * |
| 874 | * Simple function that handles the truncation of an eCryptfs inode and |
| 875 | * its corresponding lower inode. |
| 876 | * |
| 877 | * Returns zero on success; non-zero otherwise |
| 878 | */ |
| 879 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) |
| 880 | { |
| 881 | struct iattr ia = { .ia_valid = ATTR_SIZE, .ia_size = new_length }; |
| 882 | struct iattr lower_ia = { .ia_valid = 0 }; |
| 883 | int rc; |
| 884 | |
Tyler Hicks | a261a03 | 2012-01-19 20:33:44 -0600 | [diff] [blame] | 885 | rc = ecryptfs_inode_newsize_ok(dentry->d_inode, new_length); |
| 886 | if (rc) |
| 887 | return rc; |
| 888 | |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 889 | rc = truncate_upper(dentry, &ia, &lower_ia); |
| 890 | if (!rc && lower_ia.ia_valid & ATTR_SIZE) { |
| 891 | struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 892 | |
| 893 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
| 894 | rc = notify_change(lower_dentry, &lower_ia); |
| 895 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
| 896 | } |
| 897 | return rc; |
| 898 | } |
| 899 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 900 | static int |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 901 | ecryptfs_permission(struct inode *inode, int mask) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 902 | { |
Al Viro | f419a2e | 2008-07-22 00:07:17 -0400 | [diff] [blame] | 903 | return inode_permission(ecryptfs_inode_to_lower(inode), mask); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | /** |
| 907 | * ecryptfs_setattr |
| 908 | * @dentry: dentry handle to the inode to modify |
| 909 | * @ia: Structure with flags of what to change and values |
| 910 | * |
| 911 | * Updates the metadata of an inode. If the update is to the size |
| 912 | * i.e. truncation, then ecryptfs_truncate will handle the size modification |
| 913 | * of both the ecryptfs inode and the lower inode. |
| 914 | * |
| 915 | * All other metadata changes will be passed right to the lower filesystem, |
| 916 | * and we will just update our inode to look like the lower. |
| 917 | */ |
| 918 | static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) |
| 919 | { |
| 920 | int rc = 0; |
| 921 | struct dentry *lower_dentry; |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 922 | struct iattr lower_ia; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 923 | struct inode *inode; |
| 924 | struct inode *lower_inode; |
| 925 | struct ecryptfs_crypt_stat *crypt_stat; |
| 926 | |
| 927 | crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 928 | if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) |
| 929 | ecryptfs_init_crypt_stat(crypt_stat); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 930 | inode = dentry->d_inode; |
| 931 | lower_inode = ecryptfs_inode_to_lower(inode); |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 932 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 933 | mutex_lock(&crypt_stat->cs_mutex); |
| 934 | if (S_ISDIR(dentry->d_inode->i_mode)) |
| 935 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
Michael Halcrow | 64ee480 | 2007-07-19 01:47:54 -0700 | [diff] [blame] | 936 | else if (S_ISREG(dentry->d_inode->i_mode) |
| 937 | && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED) |
| 938 | || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) { |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 939 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 940 | |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 941 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
| 942 | dentry->d_sb)->mount_crypt_stat; |
Tyler Hicks | 3b06b3e | 2011-05-24 03:49:02 -0500 | [diff] [blame] | 943 | rc = ecryptfs_get_lower_file(dentry, inode); |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 944 | if (rc) { |
| 945 | mutex_unlock(&crypt_stat->cs_mutex); |
| 946 | goto out; |
| 947 | } |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 948 | rc = ecryptfs_read_metadata(dentry); |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 949 | ecryptfs_put_lower_file(inode); |
Michael Halcrow | 5dda699 | 2007-10-16 01:28:06 -0700 | [diff] [blame] | 950 | if (rc) { |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 951 | if (!(mount_crypt_stat->flags |
| 952 | & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) { |
| 953 | rc = -EIO; |
Michael Halcrow | 25bd817 | 2008-02-06 01:38:35 -0800 | [diff] [blame] | 954 | printk(KERN_WARNING "Either the lower file " |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 955 | "is not in a valid eCryptfs format, " |
Michael Halcrow | 25bd817 | 2008-02-06 01:38:35 -0800 | [diff] [blame] | 956 | "or the key could not be retrieved. " |
| 957 | "Plaintext passthrough mode is not " |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 958 | "enabled; returning -EIO\n"); |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 959 | mutex_unlock(&crypt_stat->cs_mutex); |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 960 | goto out; |
| 961 | } |
| 962 | rc = 0; |
Tyler Hicks | 3aeb86e | 2011-03-15 14:54:00 -0500 | [diff] [blame] | 963 | crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED |
| 964 | | ECRYPTFS_ENCRYPTED); |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 965 | } |
Michael Halcrow | e10f281 | 2007-06-27 14:09:44 -0700 | [diff] [blame] | 966 | } |
| 967 | mutex_unlock(&crypt_stat->cs_mutex); |
Tyler Hicks | a261a03 | 2012-01-19 20:33:44 -0600 | [diff] [blame] | 968 | |
| 969 | rc = inode_change_ok(inode, ia); |
| 970 | if (rc) |
| 971 | goto out; |
| 972 | if (ia->ia_valid & ATTR_SIZE) { |
| 973 | rc = ecryptfs_inode_newsize_ok(inode, ia->ia_size); |
| 974 | if (rc) |
| 975 | goto out; |
| 976 | } |
| 977 | |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 978 | memcpy(&lower_ia, ia, sizeof(lower_ia)); |
| 979 | if (ia->ia_valid & ATTR_FILE) |
| 980 | lower_ia.ia_file = ecryptfs_file_to_lower(ia->ia_file); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 981 | if (ia->ia_valid & ATTR_SIZE) { |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 982 | rc = truncate_upper(dentry, ia, &lower_ia); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 983 | if (rc < 0) |
| 984 | goto out; |
| 985 | } |
Jeff Layton | 1ac564e | 2007-10-18 03:05:17 -0700 | [diff] [blame] | 986 | |
| 987 | /* |
| 988 | * mode change is for clearing setuid/setgid bits. Allow lower fs |
| 989 | * to interpret this in its own way. |
| 990 | */ |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 991 | if (lower_ia.ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 992 | lower_ia.ia_valid &= ~ATTR_MODE; |
Jeff Layton | 1ac564e | 2007-10-18 03:05:17 -0700 | [diff] [blame] | 993 | |
Miklos Szeredi | 9c3580a | 2008-04-29 00:59:48 -0700 | [diff] [blame] | 994 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
Tyler Hicks | 5f3ef64f | 2009-10-14 16:18:27 -0500 | [diff] [blame] | 995 | rc = notify_change(lower_dentry, &lower_ia); |
Miklos Szeredi | 9c3580a | 2008-04-29 00:59:48 -0700 | [diff] [blame] | 996 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 997 | out: |
Erez Zadok | 9afa2fb | 2009-12-02 19:51:54 -0500 | [diff] [blame] | 998 | fsstack_copy_attr_all(inode, lower_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 999 | return rc; |
| 1000 | } |
| 1001 | |
Tyler Hicks | 111d61a | 2013-01-17 12:19:35 -0800 | [diff] [blame] | 1002 | static int ecryptfs_getattr_link(struct vfsmount *mnt, struct dentry *dentry, |
| 1003 | struct kstat *stat) |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 1004 | { |
| 1005 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
| 1006 | int rc = 0; |
| 1007 | |
| 1008 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
| 1009 | dentry->d_sb)->mount_crypt_stat; |
| 1010 | generic_fillattr(dentry->d_inode, stat); |
| 1011 | if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) { |
| 1012 | char *target; |
| 1013 | size_t targetsiz; |
| 1014 | |
| 1015 | rc = ecryptfs_readlink_lower(dentry, &target, &targetsiz); |
| 1016 | if (!rc) { |
| 1017 | kfree(target); |
| 1018 | stat->size = targetsiz; |
| 1019 | } |
| 1020 | } |
| 1021 | return rc; |
| 1022 | } |
| 1023 | |
Tyler Hicks | 111d61a | 2013-01-17 12:19:35 -0800 | [diff] [blame] | 1024 | static int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1025 | struct kstat *stat) |
Tyler Hicks | f8f484d | 2009-11-04 02:48:01 -0600 | [diff] [blame] | 1026 | { |
| 1027 | struct kstat lower_stat; |
| 1028 | int rc; |
| 1029 | |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 1030 | rc = vfs_getattr(ecryptfs_dentry_to_lower_path(dentry), &lower_stat); |
Tyler Hicks | f8f484d | 2009-11-04 02:48:01 -0600 | [diff] [blame] | 1031 | if (!rc) { |
Tyler Hicks | 55f9cf6 | 2011-01-11 12:43:42 -0600 | [diff] [blame] | 1032 | fsstack_copy_attr_all(dentry->d_inode, |
| 1033 | ecryptfs_inode_to_lower(dentry->d_inode)); |
Tyler Hicks | f8f484d | 2009-11-04 02:48:01 -0600 | [diff] [blame] | 1034 | generic_fillattr(dentry->d_inode, stat); |
| 1035 | stat->blocks = lower_stat.blocks; |
| 1036 | } |
| 1037 | return rc; |
| 1038 | } |
| 1039 | |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 1040 | int |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1041 | ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, |
| 1042 | size_t size, int flags) |
| 1043 | { |
| 1044 | int rc = 0; |
| 1045 | struct dentry *lower_dentry; |
| 1046 | |
| 1047 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 1048 | if (!lower_dentry->d_inode->i_op->setxattr) { |
Christian Pulvermacher | cfce08c | 2010-03-23 11:51:38 -0500 | [diff] [blame] | 1049 | rc = -EOPNOTSUPP; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1050 | goto out; |
| 1051 | } |
Roberto Sassu | 48b512e | 2010-10-05 18:53:45 +0200 | [diff] [blame] | 1052 | |
| 1053 | rc = vfs_setxattr(lower_dentry, name, value, size, flags); |
Tyler Hicks | 545d680 | 2012-02-07 17:55:40 -0600 | [diff] [blame] | 1054 | if (!rc) |
| 1055 | fsstack_copy_attr_all(dentry->d_inode, lower_dentry->d_inode); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1056 | out: |
| 1057 | return rc; |
| 1058 | } |
| 1059 | |
Michael Halcrow | dd2a3b7 | 2007-02-12 00:53:46 -0800 | [diff] [blame] | 1060 | ssize_t |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 1061 | ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, |
| 1062 | void *value, size_t size) |
| 1063 | { |
| 1064 | int rc = 0; |
| 1065 | |
| 1066 | if (!lower_dentry->d_inode->i_op->getxattr) { |
Christian Pulvermacher | cfce08c | 2010-03-23 11:51:38 -0500 | [diff] [blame] | 1067 | rc = -EOPNOTSUPP; |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 1068 | goto out; |
| 1069 | } |
| 1070 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
| 1071 | rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, |
| 1072 | size); |
| 1073 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
| 1074 | out: |
| 1075 | return rc; |
| 1076 | } |
| 1077 | |
Adrian Bunk | 7896b63 | 2008-02-06 01:38:32 -0800 | [diff] [blame] | 1078 | static ssize_t |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1079 | ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, |
| 1080 | size_t size) |
| 1081 | { |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 1082 | return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name, |
| 1083 | value, size); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | static ssize_t |
| 1087 | ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) |
| 1088 | { |
| 1089 | int rc = 0; |
| 1090 | struct dentry *lower_dentry; |
| 1091 | |
| 1092 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 1093 | if (!lower_dentry->d_inode->i_op->listxattr) { |
Christian Pulvermacher | cfce08c | 2010-03-23 11:51:38 -0500 | [diff] [blame] | 1094 | rc = -EOPNOTSUPP; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1095 | goto out; |
| 1096 | } |
| 1097 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
| 1098 | rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size); |
| 1099 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
| 1100 | out: |
| 1101 | return rc; |
| 1102 | } |
| 1103 | |
| 1104 | static int ecryptfs_removexattr(struct dentry *dentry, const char *name) |
| 1105 | { |
| 1106 | int rc = 0; |
| 1107 | struct dentry *lower_dentry; |
| 1108 | |
| 1109 | lower_dentry = ecryptfs_dentry_to_lower(dentry); |
| 1110 | if (!lower_dentry->d_inode->i_op->removexattr) { |
Christian Pulvermacher | cfce08c | 2010-03-23 11:51:38 -0500 | [diff] [blame] | 1111 | rc = -EOPNOTSUPP; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1112 | goto out; |
| 1113 | } |
| 1114 | mutex_lock(&lower_dentry->d_inode->i_mutex); |
| 1115 | rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); |
| 1116 | mutex_unlock(&lower_dentry->d_inode->i_mutex); |
| 1117 | out: |
| 1118 | return rc; |
| 1119 | } |
| 1120 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1121 | const struct inode_operations ecryptfs_symlink_iops = { |
Al Viro | 408bd62 | 2012-05-03 09:34:20 -0400 | [diff] [blame] | 1122 | .readlink = generic_readlink, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1123 | .follow_link = ecryptfs_follow_link, |
| 1124 | .put_link = ecryptfs_put_link, |
| 1125 | .permission = ecryptfs_permission, |
| 1126 | .setattr = ecryptfs_setattr, |
Tyler Hicks | 3a60a16 | 2010-03-22 00:41:35 -0500 | [diff] [blame] | 1127 | .getattr = ecryptfs_getattr_link, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1128 | .setxattr = ecryptfs_setxattr, |
| 1129 | .getxattr = ecryptfs_getxattr, |
| 1130 | .listxattr = ecryptfs_listxattr, |
| 1131 | .removexattr = ecryptfs_removexattr |
| 1132 | }; |
| 1133 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1134 | const struct inode_operations ecryptfs_dir_iops = { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1135 | .create = ecryptfs_create, |
| 1136 | .lookup = ecryptfs_lookup, |
| 1137 | .link = ecryptfs_link, |
| 1138 | .unlink = ecryptfs_unlink, |
| 1139 | .symlink = ecryptfs_symlink, |
| 1140 | .mkdir = ecryptfs_mkdir, |
| 1141 | .rmdir = ecryptfs_rmdir, |
| 1142 | .mknod = ecryptfs_mknod, |
| 1143 | .rename = ecryptfs_rename, |
| 1144 | .permission = ecryptfs_permission, |
| 1145 | .setattr = ecryptfs_setattr, |
| 1146 | .setxattr = ecryptfs_setxattr, |
| 1147 | .getxattr = ecryptfs_getxattr, |
| 1148 | .listxattr = ecryptfs_listxattr, |
| 1149 | .removexattr = ecryptfs_removexattr |
| 1150 | }; |
| 1151 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1152 | const struct inode_operations ecryptfs_main_iops = { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1153 | .permission = ecryptfs_permission, |
| 1154 | .setattr = ecryptfs_setattr, |
Tyler Hicks | f8f484d | 2009-11-04 02:48:01 -0600 | [diff] [blame] | 1155 | .getattr = ecryptfs_getattr, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 1156 | .setxattr = ecryptfs_setxattr, |
| 1157 | .getxattr = ecryptfs_getxattr, |
| 1158 | .listxattr = ecryptfs_listxattr, |
| 1159 | .removexattr = ecryptfs_removexattr |
| 1160 | }; |