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> |
Kent Overstreet | a27bb33 | 2013-05-07 16:19:08 -0700 | [diff] [blame] | 34 | #include <linux/aio.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, |
Al Viro | 0279782 | 2014-04-02 14:40:38 -0400 | [diff] [blame] | 48 | struct iov_iter *to) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 49 | { |
Edward Shishkin | 38a708d | 2010-10-30 00:11:50 +0200 | [diff] [blame] | 50 | ssize_t rc; |
Matthew Wilcox | cc18ec3 | 2013-06-15 07:55:59 -0400 | [diff] [blame] | 51 | struct path *path; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 52 | struct file *file = iocb->ki_filp; |
| 53 | |
Al Viro | 0279782 | 2014-04-02 14:40:38 -0400 | [diff] [blame] | 54 | rc = generic_file_read_iter(iocb, to); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 55 | /* |
| 56 | * Even though this is a async interface, we need to wait |
| 57 | * for IO to finish to update atime |
| 58 | */ |
| 59 | if (-EIOCBQUEUED == rc) |
| 60 | rc = wait_on_sync_kiocb(iocb); |
| 61 | if (rc >= 0) { |
Matthew Wilcox | cc18ec3 | 2013-06-15 07:55:59 -0400 | [diff] [blame] | 62 | path = ecryptfs_dentry_to_lower_path(file->f_path.dentry); |
| 63 | touch_atime(path); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 64 | } |
| 65 | return rc; |
| 66 | } |
| 67 | |
| 68 | struct ecryptfs_getdents_callback { |
Al Viro | 5c0ba4e | 2013-05-15 13:52:59 -0400 | [diff] [blame] | 69 | struct dir_context ctx; |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 70 | struct dir_context *caller; |
Al Viro | 0747fdb | 2013-06-16 20:05:38 +0400 | [diff] [blame] | 71 | struct super_block *sb; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 72 | int filldir_called; |
| 73 | int entries_written; |
| 74 | }; |
| 75 | |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 76 | /* Inspired by generic filldir in fs/readdir.c */ |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 77 | static int |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 78 | ecryptfs_filldir(struct dir_context *ctx, const char *lower_name, |
| 79 | int lower_namelen, loff_t offset, u64 ino, unsigned int d_type) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 80 | { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 81 | struct ecryptfs_getdents_callback *buf = |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 82 | container_of(ctx, struct ecryptfs_getdents_callback, ctx); |
Michael Halcrow | a8f1286 | 2009-01-06 14:42:03 -0800 | [diff] [blame] | 83 | size_t name_size; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 84 | char *name; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 85 | int rc; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 86 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 87 | buf->filldir_called++; |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 88 | rc = ecryptfs_decode_and_decrypt_filename(&name, &name_size, |
Al Viro | 0747fdb | 2013-06-16 20:05:38 +0400 | [diff] [blame] | 89 | buf->sb, lower_name, |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 90 | lower_namelen); |
| 91 | if (rc) { |
| 92 | printk(KERN_ERR "%s: Error attempting to decode and decrypt " |
| 93 | "filename [%s]; rc = [%d]\n", __func__, lower_name, |
| 94 | rc); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 95 | goto out; |
| 96 | } |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 97 | buf->caller->pos = buf->ctx.pos; |
| 98 | rc = !dir_emit(buf->caller, name, name_size, ino, d_type); |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 99 | kfree(name); |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 100 | if (!rc) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 101 | buf->entries_written++; |
| 102 | out: |
| 103 | return rc; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * ecryptfs_readdir |
Michael Halcrow | addd65ad | 2009-01-06 14:42:00 -0800 | [diff] [blame] | 108 | * @file: The eCryptfs directory file |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 109 | * @ctx: The actor to feed the entries to |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 110 | */ |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 111 | static int ecryptfs_readdir(struct file *file, struct dir_context *ctx) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 112 | { |
| 113 | int rc; |
| 114 | struct file *lower_file; |
Al Viro | 0747fdb | 2013-06-16 20:05:38 +0400 | [diff] [blame] | 115 | struct inode *inode = file_inode(file); |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 116 | struct ecryptfs_getdents_callback buf = { |
| 117 | .ctx.actor = ecryptfs_filldir, |
| 118 | .caller = ctx, |
Al Viro | 0747fdb | 2013-06-16 20:05:38 +0400 | [diff] [blame] | 119 | .sb = inode->i_sb, |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 120 | }; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 121 | lower_file = ecryptfs_file_to_lower(file); |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 122 | lower_file->f_pos = ctx->pos; |
Al Viro | 5c0ba4e | 2013-05-15 13:52:59 -0400 | [diff] [blame] | 123 | rc = iterate_dir(lower_file, &buf.ctx); |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 124 | ctx->pos = buf.ctx.pos; |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 125 | if (rc < 0) |
| 126 | goto out; |
| 127 | if (buf.filldir_called && !buf.entries_written) |
| 128 | goto out; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 129 | if (rc >= 0) |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 130 | fsstack_copy_attr_atime(inode, |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 131 | file_inode(lower_file)); |
Michael Halcrow | 7d6c704 | 2008-10-15 22:02:49 -0700 | [diff] [blame] | 132 | out: |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 133 | return rc; |
| 134 | } |
| 135 | |
| 136 | struct kmem_cache *ecryptfs_file_info_cache; |
| 137 | |
Tyler Hicks | e3ccaa9 | 2012-06-20 23:50:59 -0700 | [diff] [blame] | 138 | static int read_or_initialize_metadata(struct dentry *dentry) |
| 139 | { |
| 140 | struct inode *inode = dentry->d_inode; |
| 141 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
| 142 | struct ecryptfs_crypt_stat *crypt_stat; |
| 143 | int rc; |
| 144 | |
| 145 | crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; |
| 146 | mount_crypt_stat = &ecryptfs_superblock_to_private( |
| 147 | inode->i_sb)->mount_crypt_stat; |
| 148 | mutex_lock(&crypt_stat->cs_mutex); |
| 149 | |
| 150 | if (crypt_stat->flags & ECRYPTFS_POLICY_APPLIED && |
| 151 | crypt_stat->flags & ECRYPTFS_KEY_VALID) { |
| 152 | rc = 0; |
| 153 | goto out; |
| 154 | } |
| 155 | |
| 156 | rc = ecryptfs_read_metadata(dentry); |
| 157 | if (!rc) |
| 158 | goto out; |
| 159 | |
| 160 | if (mount_crypt_stat->flags & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED) { |
| 161 | crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED |
| 162 | | ECRYPTFS_ENCRYPTED); |
| 163 | rc = 0; |
| 164 | goto out; |
| 165 | } |
| 166 | |
| 167 | if (!(mount_crypt_stat->flags & ECRYPTFS_XATTR_METADATA_ENABLED) && |
| 168 | !i_size_read(ecryptfs_inode_to_lower(inode))) { |
| 169 | rc = ecryptfs_initialize_file(dentry, inode); |
| 170 | if (!rc) |
| 171 | goto out; |
| 172 | } |
| 173 | |
| 174 | rc = -EIO; |
| 175 | out: |
| 176 | mutex_unlock(&crypt_stat->cs_mutex); |
| 177 | return rc; |
| 178 | } |
| 179 | |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 180 | /** |
| 181 | * ecryptfs_open |
| 182 | * @inode: inode speciying file to open |
| 183 | * @file: Structure to return filled in |
| 184 | * |
| 185 | * Opens the file specified by inode. |
| 186 | * |
| 187 | * Returns zero on success; non-zero otherwise |
| 188 | */ |
| 189 | static int ecryptfs_open(struct inode *inode, struct file *file) |
| 190 | { |
| 191 | int rc = 0; |
| 192 | struct ecryptfs_crypt_stat *crypt_stat = NULL; |
Josef "Jeff" Sipek | bd243a4 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 193 | struct dentry *ecryptfs_dentry = file->f_path.dentry; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 194 | /* Private value of ecryptfs_dentry allocated in |
| 195 | * ecryptfs_lookup() */ |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 196 | struct ecryptfs_file_info *file_info; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 197 | |
| 198 | /* Released in ecryptfs_release or end of function if failure */ |
Robert P. J. Day | c376222 | 2007-02-10 01:45:03 -0800 | [diff] [blame] | 199 | file_info = kmem_cache_zalloc(ecryptfs_file_info_cache, GFP_KERNEL); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 200 | ecryptfs_set_file_private(file, file_info); |
| 201 | if (!file_info) { |
| 202 | ecryptfs_printk(KERN_ERR, |
| 203 | "Error attempting to allocate memory\n"); |
| 204 | rc = -ENOMEM; |
| 205 | goto out; |
| 206 | } |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 207 | crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 208 | mutex_lock(&crypt_stat->cs_mutex); |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 209 | if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 210 | ecryptfs_printk(KERN_DEBUG, "Setting flags for stat...\n"); |
| 211 | /* Policy code enabled in future release */ |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 212 | crypt_stat->flags |= (ECRYPTFS_POLICY_APPLIED |
| 213 | | ECRYPTFS_ENCRYPTED); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 214 | } |
| 215 | mutex_unlock(&crypt_stat->cs_mutex); |
Tyler Hicks | 3b06b3e | 2011-05-24 03:49:02 -0500 | [diff] [blame] | 216 | rc = ecryptfs_get_lower_file(ecryptfs_dentry, inode); |
Roberto Sassu | 2799289 | 2010-11-03 11:11:28 +0100 | [diff] [blame] | 217 | if (rc) { |
| 218 | printk(KERN_ERR "%s: Error attempting to initialize " |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 219 | "the lower file for the dentry with name " |
David Howells | 9e78d14 | 2013-12-10 15:26:48 +0000 | [diff] [blame] | 220 | "[%pd]; rc = [%d]\n", __func__, |
| 221 | ecryptfs_dentry, rc); |
Roberto Sassu | 2799289 | 2010-11-03 11:11:28 +0100 | [diff] [blame] | 222 | goto out_free; |
Michael Halcrow | 72b55ff | 2008-07-23 21:30:07 -0700 | [diff] [blame] | 223 | } |
Roberto Sassu | 0abe116 | 2010-11-03 11:11:34 +0100 | [diff] [blame] | 224 | if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_ACCMODE) |
| 225 | == O_RDONLY && (file->f_flags & O_ACCMODE) != O_RDONLY) { |
Erez Zadok | e27759d | 2009-12-03 13:35:27 -0500 | [diff] [blame] | 226 | rc = -EPERM; |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 227 | printk(KERN_WARNING "%s: Lower file is RO; eCryptfs " |
Erez Zadok | e27759d | 2009-12-03 13:35:27 -0500 | [diff] [blame] | 228 | "file must hence be opened RO\n", __func__); |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 229 | goto out_put; |
Erez Zadok | e27759d | 2009-12-03 13:35:27 -0500 | [diff] [blame] | 230 | } |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 231 | ecryptfs_set_file_lower( |
| 232 | file, ecryptfs_inode_to_private(inode)->lower_file); |
David Howells | e36cb0b | 2015-01-29 12:02:35 +0000 | [diff] [blame^] | 233 | if (d_is_dir(ecryptfs_dentry)) { |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 234 | ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); |
Michael Halcrow | 2f9b12a | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 235 | mutex_lock(&crypt_stat->cs_mutex); |
Michael Halcrow | e2bd99e | 2007-02-12 00:53:49 -0800 | [diff] [blame] | 236 | crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); |
Michael Halcrow | 2f9b12a | 2008-04-29 00:59:52 -0700 | [diff] [blame] | 237 | mutex_unlock(&crypt_stat->cs_mutex); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 238 | rc = 0; |
| 239 | goto out; |
| 240 | } |
Tyler Hicks | e3ccaa9 | 2012-06-20 23:50:59 -0700 | [diff] [blame] | 241 | rc = read_or_initialize_metadata(ecryptfs_dentry); |
| 242 | if (rc) |
| 243 | goto out_put; |
Joe Perches | 888d57b | 2010-11-10 15:46:16 -0800 | [diff] [blame] | 244 | ecryptfs_printk(KERN_DEBUG, "inode w/ addr = [0x%p], i_ino = " |
| 245 | "[0x%.16lx] size: [0x%.16llx]\n", inode, inode->i_ino, |
| 246 | (unsigned long long)i_size_read(inode)); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 247 | goto out; |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 248 | out_put: |
| 249 | ecryptfs_put_lower_file(inode); |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 250 | out_free: |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 251 | kmem_cache_free(ecryptfs_file_info_cache, |
| 252 | ecryptfs_file_to_private(file)); |
| 253 | out: |
| 254 | return rc; |
| 255 | } |
| 256 | |
| 257 | static int ecryptfs_flush(struct file *file, fl_owner_t td) |
| 258 | { |
Tyler Hicks | 64e6651 | 2012-09-12 18:38:00 -0700 | [diff] [blame] | 259 | struct file *lower_file = ecryptfs_file_to_lower(file); |
| 260 | |
Al Viro | 72c2d53 | 2013-09-22 16:27:52 -0400 | [diff] [blame] | 261 | if (lower_file->f_op->flush) { |
Tyler Hicks | 64e6651 | 2012-09-12 18:38:00 -0700 | [diff] [blame] | 262 | filemap_write_and_wait(file->f_mapping); |
| 263 | return lower_file->f_op->flush(lower_file, td); |
| 264 | } |
| 265 | |
| 266 | return 0; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | static int ecryptfs_release(struct inode *inode, struct file *file) |
| 270 | { |
Tyler Hicks | 332ab16 | 2011-04-14 15:35:11 -0500 | [diff] [blame] | 271 | ecryptfs_put_lower_file(inode); |
Michael Halcrow | 2ed9255 | 2007-10-16 01:28:10 -0700 | [diff] [blame] | 272 | kmem_cache_free(ecryptfs_file_info_cache, |
| 273 | ecryptfs_file_to_private(file)); |
| 274 | return 0; |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | static int |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 278 | ecryptfs_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 279 | { |
Tyler Hicks | bc5abcf | 2013-06-04 10:24:56 -0700 | [diff] [blame] | 280 | int rc; |
| 281 | |
| 282 | rc = filemap_write_and_wait(file->f_mapping); |
| 283 | if (rc) |
| 284 | return rc; |
| 285 | |
Tyler Hicks | 821f749 | 2012-07-03 16:50:57 -0700 | [diff] [blame] | 286 | return vfs_fsync(ecryptfs_file_to_lower(file), datasync); |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static int ecryptfs_fasync(int fd, struct file *file, int flag) |
| 290 | { |
| 291 | int rc = 0; |
| 292 | struct file *lower_file = NULL; |
| 293 | |
| 294 | lower_file = ecryptfs_file_to_lower(file); |
Al Viro | 72c2d53 | 2013-09-22 16:27:52 -0400 | [diff] [blame] | 295 | if (lower_file->f_op->fasync) |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 296 | rc = lower_file->f_op->fasync(fd, lower_file, flag); |
| 297 | return rc; |
| 298 | } |
| 299 | |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 300 | static long |
| 301 | ecryptfs_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 302 | { |
Tyler Hicks | 2000f5b | 2013-11-13 10:09:42 -0800 | [diff] [blame] | 303 | struct file *lower_file = ecryptfs_file_to_lower(file); |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 304 | long rc = -ENOTTY; |
| 305 | |
Al Viro | bdd3536 | 2013-11-09 22:19:48 -0500 | [diff] [blame] | 306 | if (lower_file->f_op->unlocked_ioctl) |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 307 | rc = lower_file->f_op->unlocked_ioctl(lower_file, cmd, arg); |
| 308 | return rc; |
| 309 | } |
| 310 | |
| 311 | #ifdef CONFIG_COMPAT |
| 312 | static long |
| 313 | ecryptfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 314 | { |
Tyler Hicks | 2000f5b | 2013-11-13 10:09:42 -0800 | [diff] [blame] | 315 | struct file *lower_file = ecryptfs_file_to_lower(file); |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 316 | long rc = -ENOIOCTLCMD; |
| 317 | |
Al Viro | c2e3f5d | 2014-09-02 17:31:28 -0400 | [diff] [blame] | 318 | if (lower_file->f_op->compat_ioctl) |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 319 | rc = lower_file->f_op->compat_ioctl(lower_file, cmd, arg); |
| 320 | return rc; |
| 321 | } |
| 322 | #endif |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 323 | |
| 324 | const struct file_operations ecryptfs_dir_fops = { |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 325 | .iterate = ecryptfs_readdir, |
Andy Whitcroft | 323ef68 | 2011-02-16 04:49:59 +0000 | [diff] [blame] | 326 | .read = generic_read_dir, |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 327 | .unlocked_ioctl = ecryptfs_unlocked_ioctl, |
| 328 | #ifdef CONFIG_COMPAT |
| 329 | .compat_ioctl = ecryptfs_compat_ioctl, |
| 330 | #endif |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 331 | .open = ecryptfs_open, |
| 332 | .flush = ecryptfs_flush, |
| 333 | .release = ecryptfs_release, |
| 334 | .fsync = ecryptfs_fsync, |
| 335 | .fasync = ecryptfs_fasync, |
Michael Halcrow | e9f6a99 | 2007-10-16 01:28:04 -0700 | [diff] [blame] | 336 | .splice_read = generic_file_splice_read, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 337 | .llseek = default_llseek, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 338 | }; |
| 339 | |
| 340 | const struct file_operations ecryptfs_main_fops = { |
Michael Halcrow | 53a2731 | 2007-05-23 13:58:15 -0700 | [diff] [blame] | 341 | .llseek = generic_file_llseek, |
Al Viro | 0279782 | 2014-04-02 14:40:38 -0400 | [diff] [blame] | 342 | .read = new_sync_read, |
| 343 | .read_iter = ecryptfs_read_update_atime, |
Al Viro | 8174202 | 2014-04-03 03:17:43 -0400 | [diff] [blame] | 344 | .write = new_sync_write, |
| 345 | .write_iter = generic_file_write_iter, |
Al Viro | 2de5f05 | 2013-05-22 21:23:40 -0400 | [diff] [blame] | 346 | .iterate = ecryptfs_readdir, |
Tyler Hicks | c43f7b8 | 2009-11-03 11:45:11 -0600 | [diff] [blame] | 347 | .unlocked_ioctl = ecryptfs_unlocked_ioctl, |
| 348 | #ifdef CONFIG_COMPAT |
| 349 | .compat_ioctl = ecryptfs_compat_ioctl, |
| 350 | #endif |
Tyler Hicks | 821f749 | 2012-07-03 16:50:57 -0700 | [diff] [blame] | 351 | .mmap = generic_file_mmap, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 352 | .open = ecryptfs_open, |
| 353 | .flush = ecryptfs_flush, |
| 354 | .release = ecryptfs_release, |
| 355 | .fsync = ecryptfs_fsync, |
| 356 | .fasync = ecryptfs_fasync, |
Michael Halcrow | e9f6a99 | 2007-10-16 01:28:04 -0700 | [diff] [blame] | 357 | .splice_read = generic_file_splice_read, |
Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 358 | }; |