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 <mhalcrow@us.ibm.com> |
| 8 | * Michael C. Thompson <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/poll.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 29 | #include <linux/mount.h> |
| 30 | #include <linux/pagemap.h> |
| 31 | #include <linux/security.h> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 32 | #include <linux/compat.h> |
Josef "Jeff" Sipek | 0cc72dc | 2006-12-08 02:36:31 -0800 | [diff] [blame] | 33 | #include <linux/fs_stack.h> |
Jonathan Corbet | dda6445 | 2008-06-19 16:18:25 -0600 | [diff] [blame] | 34 | #include <linux/smp_lock.h> |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 35 | #include "ecryptfs_kernel.h" |
| 36 | |
| 37 | /** |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 38 | * ecryptfs_read_update_atime |
| 39 | * |
| 40 | * generic_file_read updates the atime of upper layer inode. But, it |
| 41 | * doesn't give us a chance to update the atime of the lower layer |
| 42 | * inode. This function is a wrapper to generic_file_read. It |
| 43 | * updates the atime of the lower level inode if generic_file_read |
| 44 | * returns without any errors. This is to be used only for file reads. |
| 45 | * The function to be used for directory reads is ecryptfs_read. |
| 46 | */ |
| 47 | static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb, |
| 48 | const struct iovec *iov, |
| 49 | unsigned long nr_segs, loff_t pos) |
| 50 | { |
| 51 | int rc; |
| 52 | struct dentry *lower_dentry; |
| 53 | struct vfsmount *lower_vfsmount; |
| 54 | struct file *file = iocb->ki_filp; |
| 55 | |
| 56 | rc = generic_file_aio_read(iocb, iov, nr_segs, pos); |
| 57 | /* |
| 58 | * Even though this is a async interface, we need to wait |
| 59 | * for IO to finish to update atime |
| 60 | */ |
| 61 | if (-EIOCBQUEUED == rc) |
| 62 | rc = wait_on_sync_kiocb(iocb); |
| 63 | if (rc >= 0) { |
Josef "Jeff" Sipek | bd243a4 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 64 | lower_dentry = ecryptfs_dentry_to_lower(file->f_path.dentry); |
| 65 | lower_vfsmount = ecryptfs_dentry_to_lower_mnt(file->f_path.dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 66 | touch_atime(lower_vfsmount, lower_dentry); |
| 67 | } |
| 68 | return rc; |
| 69 | } |
| 70 | |
| 71 | struct ecryptfs_getdents_callback { |
| 72 | void *dirent; |
| 73 | struct dentry *dentry; |
| 74 | filldir_t filldir; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 75 | int filldir_called; |
| 76 | int entries_written; |
| 77 | }; |
| 78 | |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 79 | /* Inspired by generic filldir in fs/readdir.c */ |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 80 | static int |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 81 | ecryptfs_filldir(void *dirent, const char *lower_name, int lower_namelen, |
| 82 | loff_t offset, u64 ino, unsigned int d_type) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 83 | { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 84 | struct ecryptfs_getdents_callback *buf = |
| 85 | (struct ecryptfs_getdents_callback *)dirent; |
Michael Halcrow | a8f1286 | 2009-01-06 14:42:03 -0800 | [diff] [blame] | 86 | size_t name_size; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 87 | char *name; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 88 | int rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 89 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 90 | buf->filldir_called++; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 91 | rc = ecryptfs_decode_and_decrypt_filename(&name, &name_size, |
| 92 | buf->dentry, lower_name, |
| 93 | lower_namelen); |
| 94 | if (rc) { |
| 95 | printk(KERN_ERR "%s: Error attempting to decode and decrypt " |
| 96 | "filename [%s]; rc = [%d]\n", __func__, lower_name, |
| 97 | rc); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 98 | goto out; |
| 99 | } |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 100 | rc = buf->filldir(buf->dirent, name, name_size, offset, ino, d_type); |
| 101 | kfree(name); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 102 | if (rc >= 0) |
| 103 | buf->entries_written++; |
| 104 | out: |
| 105 | return rc; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * ecryptfs_readdir |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 110 | * @file: The eCryptfs directory file |
| 111 | * @dirent: Directory entry handle |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 112 | * @filldir: The filldir callback function |
| 113 | */ |
| 114 | static int ecryptfs_readdir(struct file *file, void *dirent, filldir_t filldir) |
| 115 | { |
| 116 | int rc; |
| 117 | struct file *lower_file; |
| 118 | struct inode *inode; |
| 119 | struct ecryptfs_getdents_callback buf; |
| 120 | |
| 121 | lower_file = ecryptfs_file_to_lower(file); |
| 122 | lower_file->f_pos = file->f_pos; |
Josef "Jeff" Sipek | bd243a4 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 123 | inode = file->f_path.dentry->d_inode; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 124 | memset(&buf, 0, sizeof(buf)); |
| 125 | buf.dirent = dirent; |
Josef "Jeff" Sipek | bd243a4 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 126 | buf.dentry = file->f_path.dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 127 | buf.filldir = filldir; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 128 | buf.filldir_called = 0; |
| 129 | buf.entries_written = 0; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 130 | rc = vfs_readdir(lower_file, ecryptfs_filldir, (void *)&buf); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 131 | file->f_pos = lower_file->f_pos; |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 132 | if (rc < 0) |
| 133 | goto out; |
| 134 | if (buf.filldir_called && !buf.entries_written) |
| 135 | goto out; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 136 | if (rc >= 0) |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 137 | fsstack_copy_attr_atime(inode, |
| 138 | lower_file->f_path.dentry->d_inode); |
| 139 | out: |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 140 | return rc; |
| 141 | } |
| 142 | |
| 143 | struct kmem_cache *ecryptfs_file_info_cache; |
| 144 | |
| 145 | /** |
| 146 | * ecryptfs_open |
| 147 | * @inode: inode speciying file to open |
| 148 | * @file: Structure to return filled in |
| 149 | * |
| 150 | * Opens the file specified by inode. |
| 151 | * |
| 152 | * Returns zero on success; non-zero otherwise |
| 153 | */ |
| 154 | static int ecryptfs_open(struct inode *inode, struct file *file) |
| 155 | { |
| 156 | int rc = 0; |
| 157 | struct ecryptfs_crypt_stat *crypt_stat = NULL; |
| 158 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
Josef "Jeff" Sipek | bd243a4 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 159 | struct dentry *ecryptfs_dentry = file->f_path.dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 160 | /* Private value of ecryptfs_dentry allocated in |
| 161 | * ecryptfs_lookup() */ |
Julia Lawall | 4aa25bc | 2010-01-16 17:00:26 +0100 | [diff] [blame] | 162 | struct dentry *lower_dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 163 | struct ecryptfs_file_info *file_info; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 164 | |
Michael Halcrow | e77a56d | 2007-02-12 00:53:47 -0800 | [diff] [blame] | 165 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
| 166 | ecryptfs_dentry->d_sb)->mount_crypt_stat; |
| 167 | if ((mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) |
| 168 | && ((file->f_flags & O_WRONLY) || (file->f_flags & O_RDWR) |
| 169 | || (file->f_flags & O_CREAT) || (file->f_flags & O_TRUNC) |
| 170 | || (file->f_flags & O_APPEND))) { |
| 171 | printk(KERN_WARNING "Mount has encrypted view enabled; " |
| 172 | "files may only be read\n"); |
| 173 | rc = -EPERM; |
| 174 | goto out; |
| 175 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 176 | /* Released in ecryptfs_release or end of function if failure */ |
Robert P. J. Day | c376222 | 2007-02-10 01:45:03 -0800 | [diff] [blame] | 177 | file_info = kmem_cache_zalloc(ecryptfs_file_info_cache, GFP_KERNEL); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 178 | ecryptfs_set_file_private(file, file_info); |
| 179 | if (!file_info) { |
| 180 | ecryptfs_printk(KERN_ERR, |
| 181 | "Error attempting to allocate memory\n"); |
| 182 | rc = -ENOMEM; |
| 183 | goto out; |
| 184 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 185 | lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); |
| 186 | crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 187 | mutex_lock(&crypt_stat->cs_mutex); |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 188 | if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 189 | ecryptfs_printk(KERN_DEBUG, "Setting flags for stat...\n"); |
| 190 | /* Policy code enabled in future release */ |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 191 | crypt_stat->flags |= (ECRYPTFS_POLICY_APPLIED |
| 192 | | ECRYPTFS_ENCRYPTED); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 193 | } |
| 194 | mutex_unlock(&crypt_stat->cs_mutex); |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 195 | if (!ecryptfs_inode_to_private(inode)->lower_file) { |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 196 | rc = ecryptfs_init_persistent_file(ecryptfs_dentry); |
| 197 | if (rc) { |
| 198 | printk(KERN_ERR "%s: Error attempting to initialize " |
| 199 | "the persistent file for the dentry with name " |
| 200 | "[%s]; rc = [%d]\n", __func__, |
| 201 | ecryptfs_dentry->d_name.name, rc); |
Julia Lawall | ceeab92 | 2010-08-06 22:58:49 +0200 | [diff] [blame] | 202 | goto out_free; |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 203 | } |
| 204 | } |
Erez Zadok | e27759d | 2009-12-03 13:35:27 -0500 | [diff] [blame] | 205 | if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_RDONLY) |
| 206 | && !(file->f_flags & O_RDONLY)) { |
| 207 | rc = -EPERM; |
| 208 | printk(KERN_WARNING "%s: Lower persistent file is RO; eCryptfs " |
| 209 | "file must hence be opened RO\n", __func__); |
Julia Lawall | ceeab92 | 2010-08-06 22:58:49 +0200 | [diff] [blame] | 210 | goto out_free; |
Erez Zadok | e27759d | 2009-12-03 13:35:27 -0500 | [diff] [blame] | 211 | } |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 212 | ecryptfs_set_file_lower( |
| 213 | file, ecryptfs_inode_to_private(inode)->lower_file); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 214 | if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) { |
| 215 | ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); |
Michael Halcrow | 2f9b12a | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 216 | mutex_lock(&crypt_stat->cs_mutex); |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 217 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
Michael Halcrow | 2f9b12a | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 218 | mutex_unlock(&crypt_stat->cs_mutex); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 219 | rc = 0; |
| 220 | goto out; |
| 221 | } |
| 222 | mutex_lock(&crypt_stat->cs_mutex); |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 223 | if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED) |
| 224 | || !(crypt_stat->flags & ECRYPTFS_KEY_VALID)) { |
Michael Halcrow | d7cdc5f | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 225 | rc = ecryptfs_read_metadata(ecryptfs_dentry); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 226 | if (rc) { |
| 227 | ecryptfs_printk(KERN_DEBUG, |
| 228 | "Valid headers not found\n"); |
| 229 | if (!(mount_crypt_stat->flags |
| 230 | & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) { |
| 231 | rc = -EIO; |
Michael Halcrow | 25bd817 | 2008-02-06 01:38:35 -0800 | [diff] [blame] | 232 | printk(KERN_WARNING "Either the lower file " |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 233 | "is not in a valid eCryptfs format, " |
Michael Halcrow | 25bd817 | 2008-02-06 01:38:35 -0800 | [diff] [blame] | 234 | "or the key could not be retrieved. " |
| 235 | "Plaintext passthrough mode is not " |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 236 | "enabled; returning -EIO\n"); |
| 237 | mutex_unlock(&crypt_stat->cs_mutex); |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 238 | goto out_free; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 239 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 240 | rc = 0; |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 241 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 242 | mutex_unlock(&crypt_stat->cs_mutex); |
| 243 | goto out; |
| 244 | } |
| 245 | } |
| 246 | mutex_unlock(&crypt_stat->cs_mutex); |
| 247 | ecryptfs_printk(KERN_DEBUG, "inode w/ addr = [0x%p], i_ino = [0x%.16x] " |
| 248 | "size: [0x%.16x]\n", inode, inode->i_ino, |
| 249 | i_size_read(inode)); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 250 | goto out; |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 251 | out_free: |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 252 | kmem_cache_free(ecryptfs_file_info_cache, |
| 253 | ecryptfs_file_to_private(file)); |
| 254 | out: |
| 255 | return rc; |
| 256 | } |
| 257 | |
| 258 | static int ecryptfs_flush(struct file *file, fl_owner_t td) |
| 259 | { |
| 260 | int rc = 0; |
| 261 | struct file *lower_file = NULL; |
| 262 | |
| 263 | lower_file = ecryptfs_file_to_lower(file); |
| 264 | if (lower_file->f_op && lower_file->f_op->flush) |
| 265 | rc = lower_file->f_op->flush(lower_file, td); |
| 266 | return rc; |
| 267 | } |
| 268 | |
| 269 | static int ecryptfs_release(struct inode *inode, struct file *file) |
| 270 | { |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 271 | kmem_cache_free(ecryptfs_file_info_cache, |
| 272 | ecryptfs_file_to_private(file)); |
| 273 | return 0; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | static int |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 277 | ecryptfs_fsync(struct file *file, int datasync) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 278 | { |
Christoph Hellwig | 8018ab0 | 2010-03-22 17:32:25 +0100 | [diff] [blame] | 279 | return vfs_fsync(ecryptfs_file_to_lower(file), datasync); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | static int ecryptfs_fasync(int fd, struct file *file, int flag) |
| 283 | { |
| 284 | int rc = 0; |
| 285 | struct file *lower_file = NULL; |
| 286 | |
Jonathan Corbet | dda6445 | 2008-06-19 16:18:25 -0600 | [diff] [blame] | 287 | lock_kernel(); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 288 | lower_file = ecryptfs_file_to_lower(file); |
| 289 | if (lower_file->f_op && lower_file->f_op->fasync) |
| 290 | rc = lower_file->f_op->fasync(fd, lower_file, flag); |
Jonathan Corbet | dda6445 | 2008-06-19 16:18:25 -0600 | [diff] [blame] | 291 | unlock_kernel(); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 292 | return rc; |
| 293 | } |
| 294 | |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 295 | static long |
| 296 | ecryptfs_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 297 | { |
| 298 | struct file *lower_file = NULL; |
| 299 | long rc = -ENOTTY; |
| 300 | |
| 301 | if (ecryptfs_file_to_private(file)) |
| 302 | lower_file = ecryptfs_file_to_lower(file); |
| 303 | if (lower_file && lower_file->f_op && lower_file->f_op->unlocked_ioctl) |
| 304 | rc = lower_file->f_op->unlocked_ioctl(lower_file, cmd, arg); |
| 305 | return rc; |
| 306 | } |
| 307 | |
| 308 | #ifdef CONFIG_COMPAT |
| 309 | static long |
| 310 | ecryptfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 311 | { |
| 312 | struct file *lower_file = NULL; |
| 313 | long rc = -ENOIOCTLCMD; |
| 314 | |
| 315 | if (ecryptfs_file_to_private(file)) |
| 316 | lower_file = ecryptfs_file_to_lower(file); |
| 317 | if (lower_file && lower_file->f_op && lower_file->f_op->compat_ioctl) |
| 318 | rc = lower_file->f_op->compat_ioctl(lower_file, cmd, arg); |
| 319 | return rc; |
| 320 | } |
| 321 | #endif |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 322 | |
| 323 | const struct file_operations ecryptfs_dir_fops = { |
| 324 | .readdir = ecryptfs_readdir, |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 325 | .unlocked_ioctl = ecryptfs_unlocked_ioctl, |
| 326 | #ifdef CONFIG_COMPAT |
| 327 | .compat_ioctl = ecryptfs_compat_ioctl, |
| 328 | #endif |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 329 | .open = ecryptfs_open, |
| 330 | .flush = ecryptfs_flush, |
| 331 | .release = ecryptfs_release, |
| 332 | .fsync = ecryptfs_fsync, |
| 333 | .fasync = ecryptfs_fasync, |
Michael Halcrow | e9f6a99 | 2007-10-16 01:28:04 -0700 | [diff] [blame] | 334 | .splice_read = generic_file_splice_read, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame^] | 335 | .llseek = default_llseek, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 336 | }; |
| 337 | |
| 338 | const struct file_operations ecryptfs_main_fops = { |
Michael Halcrow | 53a2731 | 2007-05-23 13:58:15 -0700 | [diff] [blame] | 339 | .llseek = generic_file_llseek, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 340 | .read = do_sync_read, |
| 341 | .aio_read = ecryptfs_read_update_atime, |
| 342 | .write = do_sync_write, |
| 343 | .aio_write = generic_file_aio_write, |
| 344 | .readdir = ecryptfs_readdir, |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 345 | .unlocked_ioctl = ecryptfs_unlocked_ioctl, |
| 346 | #ifdef CONFIG_COMPAT |
| 347 | .compat_ioctl = ecryptfs_compat_ioctl, |
| 348 | #endif |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 349 | .mmap = generic_file_mmap, |
| 350 | .open = ecryptfs_open, |
| 351 | .flush = ecryptfs_flush, |
| 352 | .release = ecryptfs_release, |
| 353 | .fsync = ecryptfs_fsync, |
| 354 | .fasync = ecryptfs_fasync, |
Michael Halcrow | e9f6a99 | 2007-10-16 01:28:04 -0700 | [diff] [blame] | 355 | .splice_read = generic_file_splice_read, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 356 | }; |