1237fead6SMichael Halcrow /** 2237fead6SMichael Halcrow * eCryptfs: Linux filesystem encryption layer 3237fead6SMichael Halcrow * 4237fead6SMichael Halcrow * Copyright (C) 1997-2004 Erez Zadok 5237fead6SMichael Halcrow * Copyright (C) 2001-2004 Stony Brook University 6dd2a3b7aSMichael Halcrow * Copyright (C) 2004-2007 International Business Machines Corp. 7237fead6SMichael Halcrow * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> 8237fead6SMichael Halcrow * Michael C. Thompsion <mcthomps@us.ibm.com> 9237fead6SMichael Halcrow * 10237fead6SMichael Halcrow * This program is free software; you can redistribute it and/or 11237fead6SMichael Halcrow * modify it under the terms of the GNU General Public License as 12237fead6SMichael Halcrow * published by the Free Software Foundation; either version 2 of the 13237fead6SMichael Halcrow * License, or (at your option) any later version. 14237fead6SMichael Halcrow * 15237fead6SMichael Halcrow * This program is distributed in the hope that it will be useful, but 16237fead6SMichael Halcrow * WITHOUT ANY WARRANTY; without even the implied warranty of 17237fead6SMichael Halcrow * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18237fead6SMichael Halcrow * General Public License for more details. 19237fead6SMichael Halcrow * 20237fead6SMichael Halcrow * You should have received a copy of the GNU General Public License 21237fead6SMichael Halcrow * along with this program; if not, write to the Free Software 22237fead6SMichael Halcrow * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 23237fead6SMichael Halcrow * 02111-1307, USA. 24237fead6SMichael Halcrow */ 25237fead6SMichael Halcrow 26237fead6SMichael Halcrow #include <linux/file.h> 27237fead6SMichael Halcrow #include <linux/vmalloc.h> 28237fead6SMichael Halcrow #include <linux/pagemap.h> 29237fead6SMichael Halcrow #include <linux/dcache.h> 30237fead6SMichael Halcrow #include <linux/namei.h> 31237fead6SMichael Halcrow #include <linux/mount.h> 32237fead6SMichael Halcrow #include <linux/crypto.h> 330cc72dc7SJosef "Jeff" Sipek #include <linux/fs_stack.h> 340a688ad7SHarvey Harrison #include <asm/unaligned.h> 35237fead6SMichael Halcrow #include "ecryptfs_kernel.h" 36237fead6SMichael Halcrow 37237fead6SMichael Halcrow static struct dentry *lock_parent(struct dentry *dentry) 38237fead6SMichael Halcrow { 39237fead6SMichael Halcrow struct dentry *dir; 40237fead6SMichael Halcrow 418dc4e373SMiklos Szeredi dir = dget_parent(dentry); 42908e0a8aSPeter Zijlstra mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT); 43237fead6SMichael Halcrow return dir; 44237fead6SMichael Halcrow } 45237fead6SMichael Halcrow 46237fead6SMichael Halcrow static void unlock_dir(struct dentry *dir) 47237fead6SMichael Halcrow { 48237fead6SMichael Halcrow mutex_unlock(&dir->d_inode->i_mutex); 49237fead6SMichael Halcrow dput(dir); 50237fead6SMichael Halcrow } 51237fead6SMichael Halcrow 52237fead6SMichael Halcrow /** 53237fead6SMichael Halcrow * ecryptfs_create_underlying_file 54237fead6SMichael Halcrow * @lower_dir_inode: inode of the parent in the lower fs of the new file 55237fead6SMichael Halcrow * @lower_dentry: New file's dentry in the lower fs 56237fead6SMichael Halcrow * @ecryptfs_dentry: New file's dentry in ecryptfs 57237fead6SMichael Halcrow * @mode: The mode of the new file 58237fead6SMichael Halcrow * @nd: nameidata of ecryptfs' parent's dentry & vfsmount 59237fead6SMichael Halcrow * 60237fead6SMichael Halcrow * Creates the file in the lower file system. 61237fead6SMichael Halcrow * 62237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 63237fead6SMichael Halcrow */ 64237fead6SMichael Halcrow static int 65237fead6SMichael Halcrow ecryptfs_create_underlying_file(struct inode *lower_dir_inode, 66237fead6SMichael Halcrow struct dentry *dentry, int mode, 67237fead6SMichael Halcrow struct nameidata *nd) 68237fead6SMichael Halcrow { 69237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 70237fead6SMichael Halcrow struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); 71237fead6SMichael Halcrow struct dentry *dentry_save; 72237fead6SMichael Halcrow struct vfsmount *vfsmount_save; 73237fead6SMichael Halcrow int rc; 74237fead6SMichael Halcrow 754ac91378SJan Blunck dentry_save = nd->path.dentry; 764ac91378SJan Blunck vfsmount_save = nd->path.mnt; 774ac91378SJan Blunck nd->path.dentry = lower_dentry; 784ac91378SJan Blunck nd->path.mnt = lower_mnt; 79237fead6SMichael Halcrow rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); 804ac91378SJan Blunck nd->path.dentry = dentry_save; 814ac91378SJan Blunck nd->path.mnt = vfsmount_save; 82237fead6SMichael Halcrow return rc; 83237fead6SMichael Halcrow } 84237fead6SMichael Halcrow 85237fead6SMichael Halcrow /** 86237fead6SMichael Halcrow * ecryptfs_do_create 87237fead6SMichael Halcrow * @directory_inode: inode of the new file's dentry's parent in ecryptfs 88237fead6SMichael Halcrow * @ecryptfs_dentry: New file's dentry in ecryptfs 89237fead6SMichael Halcrow * @mode: The mode of the new file 90237fead6SMichael Halcrow * @nd: nameidata of ecryptfs' parent's dentry & vfsmount 91237fead6SMichael Halcrow * 92237fead6SMichael Halcrow * Creates the underlying file and the eCryptfs inode which will link to 93237fead6SMichael Halcrow * it. It will also update the eCryptfs directory inode to mimic the 94237fead6SMichael Halcrow * stat of the lower directory inode. 95237fead6SMichael Halcrow * 96237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 97237fead6SMichael Halcrow */ 98237fead6SMichael Halcrow static int 99237fead6SMichael Halcrow ecryptfs_do_create(struct inode *directory_inode, 100237fead6SMichael Halcrow struct dentry *ecryptfs_dentry, int mode, 101237fead6SMichael Halcrow struct nameidata *nd) 102237fead6SMichael Halcrow { 103237fead6SMichael Halcrow int rc; 104237fead6SMichael Halcrow struct dentry *lower_dentry; 105237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 106237fead6SMichael Halcrow 107237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); 108237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 109801678c5SHirofumi Nakagawa if (IS_ERR(lower_dir_dentry)) { 110237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error locking directory of " 111237fead6SMichael Halcrow "dentry\n"); 112237fead6SMichael Halcrow rc = PTR_ERR(lower_dir_dentry); 113237fead6SMichael Halcrow goto out; 114237fead6SMichael Halcrow } 115237fead6SMichael Halcrow rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode, 116237fead6SMichael Halcrow ecryptfs_dentry, mode, nd); 1174981e081SMichael Halcrow if (rc) { 118caeeeecfSMichael Halcrow printk(KERN_ERR "%s: Failure to create dentry in lower fs; " 11918d1dbf1SHarvey Harrison "rc = [%d]\n", __func__, rc); 120237fead6SMichael Halcrow goto out_lock; 121237fead6SMichael Halcrow } 122237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, 123237fead6SMichael Halcrow directory_inode->i_sb, 0); 124237fead6SMichael Halcrow if (rc) { 125237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n"); 126237fead6SMichael Halcrow goto out_lock; 127237fead6SMichael Halcrow } 1280cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode); 1290cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode); 130237fead6SMichael Halcrow out_lock: 131237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 132237fead6SMichael Halcrow out: 133237fead6SMichael Halcrow return rc; 134237fead6SMichael Halcrow } 135237fead6SMichael Halcrow 136237fead6SMichael Halcrow /** 137237fead6SMichael Halcrow * grow_file 138d7cdc5feSMichael Halcrow * @ecryptfs_dentry: the eCryptfs dentry 139237fead6SMichael Halcrow * 140237fead6SMichael Halcrow * This is the code which will grow the file to its correct size. 141237fead6SMichael Halcrow */ 142d7cdc5feSMichael Halcrow static int grow_file(struct dentry *ecryptfs_dentry) 143237fead6SMichael Halcrow { 144d7cdc5feSMichael Halcrow struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode; 145237fead6SMichael Halcrow struct file fake_file; 146237fead6SMichael Halcrow struct ecryptfs_file_info tmp_file_info; 147d7cdc5feSMichael Halcrow char zero_virt[] = { 0x00 }; 148d7cdc5feSMichael Halcrow int rc = 0; 149237fead6SMichael Halcrow 150237fead6SMichael Halcrow memset(&fake_file, 0, sizeof(fake_file)); 151bd243a4bSJosef "Jeff" Sipek fake_file.f_path.dentry = ecryptfs_dentry; 152237fead6SMichael Halcrow memset(&tmp_file_info, 0, sizeof(tmp_file_info)); 153237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_file, &tmp_file_info); 154d7cdc5feSMichael Halcrow ecryptfs_set_file_lower( 155d7cdc5feSMichael Halcrow &fake_file, 156d7cdc5feSMichael Halcrow ecryptfs_inode_to_private(ecryptfs_inode)->lower_file); 157d7cdc5feSMichael Halcrow rc = ecryptfs_write(&fake_file, zero_virt, 0, 1); 158d7cdc5feSMichael Halcrow i_size_write(ecryptfs_inode, 0); 159d7cdc5feSMichael Halcrow rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode); 160d7cdc5feSMichael Halcrow ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat.flags |= 161d7cdc5feSMichael Halcrow ECRYPTFS_NEW_FILE; 162237fead6SMichael Halcrow return rc; 163237fead6SMichael Halcrow } 164237fead6SMichael Halcrow 165237fead6SMichael Halcrow /** 166237fead6SMichael Halcrow * ecryptfs_initialize_file 167237fead6SMichael Halcrow * 168237fead6SMichael Halcrow * Cause the file to be changed from a basic empty file to an ecryptfs 169237fead6SMichael Halcrow * file with a header and first data page. 170237fead6SMichael Halcrow * 171237fead6SMichael Halcrow * Returns zero on success 172237fead6SMichael Halcrow */ 173237fead6SMichael Halcrow static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry) 174237fead6SMichael Halcrow { 175d7cdc5feSMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = 176d7cdc5feSMichael Halcrow &ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat; 177237fead6SMichael Halcrow int rc = 0; 178237fead6SMichael Halcrow 179237fead6SMichael Halcrow if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) { 180237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); 181e2bd99ecSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 182d7cdc5feSMichael Halcrow goto out; 183237fead6SMichael Halcrow } 184e2bd99ecSMichael Halcrow crypt_stat->flags |= ECRYPTFS_NEW_FILE; 185237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n"); 186237fead6SMichael Halcrow rc = ecryptfs_new_file_context(ecryptfs_dentry); 187237fead6SMichael Halcrow if (rc) { 188d7cdc5feSMichael Halcrow ecryptfs_printk(KERN_ERR, "Error creating new file " 189d7cdc5feSMichael Halcrow "context; rc = [%d]\n", rc); 190d7cdc5feSMichael Halcrow goto out; 191237fead6SMichael Halcrow } 192d7cdc5feSMichael Halcrow rc = ecryptfs_write_metadata(ecryptfs_dentry); 193237fead6SMichael Halcrow if (rc) { 194d7cdc5feSMichael Halcrow printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc); 195d7cdc5feSMichael Halcrow goto out; 196237fead6SMichael Halcrow } 197d7cdc5feSMichael Halcrow rc = grow_file(ecryptfs_dentry); 1985dda6992SMichael Halcrow if (rc) 199d7cdc5feSMichael Halcrow printk(KERN_ERR "Error growing file; rc = [%d]\n", rc); 200237fead6SMichael Halcrow out: 201237fead6SMichael Halcrow return rc; 202237fead6SMichael Halcrow } 203237fead6SMichael Halcrow 204237fead6SMichael Halcrow /** 205237fead6SMichael Halcrow * ecryptfs_create 206237fead6SMichael Halcrow * @dir: The inode of the directory in which to create the file. 207237fead6SMichael Halcrow * @dentry: The eCryptfs dentry 208237fead6SMichael Halcrow * @mode: The mode of the new file. 209237fead6SMichael Halcrow * @nd: nameidata 210237fead6SMichael Halcrow * 211237fead6SMichael Halcrow * Creates a new file. 212237fead6SMichael Halcrow * 213237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 214237fead6SMichael Halcrow */ 215237fead6SMichael Halcrow static int 216237fead6SMichael Halcrow ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, 217237fead6SMichael Halcrow int mode, struct nameidata *nd) 218237fead6SMichael Halcrow { 219237fead6SMichael Halcrow int rc; 220237fead6SMichael Halcrow 2214981e081SMichael Halcrow /* ecryptfs_do_create() calls ecryptfs_interpose(), which opens 2224981e081SMichael Halcrow * the crypt_stat->lower_file (persistent file) */ 223237fead6SMichael Halcrow rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd); 224237fead6SMichael Halcrow if (unlikely(rc)) { 225237fead6SMichael Halcrow ecryptfs_printk(KERN_WARNING, "Failed to create file in" 226237fead6SMichael Halcrow "lower filesystem\n"); 227237fead6SMichael Halcrow goto out; 228237fead6SMichael Halcrow } 229237fead6SMichael Halcrow /* At this point, a file exists on "disk"; we need to make sure 230237fead6SMichael Halcrow * that this on disk file is prepared to be an ecryptfs file */ 231237fead6SMichael Halcrow rc = ecryptfs_initialize_file(ecryptfs_dentry); 232237fead6SMichael Halcrow out: 233237fead6SMichael Halcrow return rc; 234237fead6SMichael Halcrow } 235237fead6SMichael Halcrow 236237fead6SMichael Halcrow /** 237237fead6SMichael Halcrow * ecryptfs_lookup 238237fead6SMichael Halcrow * @dir: inode 239237fead6SMichael Halcrow * @dentry: The dentry 240237fead6SMichael Halcrow * @nd: nameidata, may be NULL 241237fead6SMichael Halcrow * 242237fead6SMichael Halcrow * Find a file on disk. If the file does not exist, then we'll add it to the 243237fead6SMichael Halcrow * dentry cache and continue on to read it from the disk. 244237fead6SMichael Halcrow */ 245237fead6SMichael Halcrow static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry, 246237fead6SMichael Halcrow struct nameidata *nd) 247237fead6SMichael Halcrow { 248237fead6SMichael Halcrow int rc = 0; 249237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 250237fead6SMichael Halcrow struct dentry *lower_dentry; 251237fead6SMichael Halcrow struct vfsmount *lower_mnt; 252237fead6SMichael Halcrow char *encoded_name; 253c381bfcfSMika Kukkonen int encoded_namelen; 254237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 255e77a56ddSMichael Halcrow struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 256237fead6SMichael Halcrow char *page_virt = NULL; 257237fead6SMichael Halcrow struct inode *lower_inode; 258237fead6SMichael Halcrow u64 file_size; 259237fead6SMichael Halcrow 260237fead6SMichael Halcrow lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent); 261237fead6SMichael Halcrow dentry->d_op = &ecryptfs_dops; 262237fead6SMichael Halcrow if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, ".")) 26345ec4abaSMichael Halcrow || (dentry->d_name.len == 2 26445ec4abaSMichael Halcrow && !strcmp(dentry->d_name.name, ".."))) { 26545ec4abaSMichael Halcrow d_drop(dentry); 26645ec4abaSMichael Halcrow goto out; 26745ec4abaSMichael Halcrow } 268237fead6SMichael Halcrow encoded_namelen = ecryptfs_encode_filename(crypt_stat, 269237fead6SMichael Halcrow dentry->d_name.name, 270237fead6SMichael Halcrow dentry->d_name.len, 271237fead6SMichael Halcrow &encoded_name); 272237fead6SMichael Halcrow if (encoded_namelen < 0) { 273237fead6SMichael Halcrow rc = encoded_namelen; 27445ec4abaSMichael Halcrow d_drop(dentry); 27545ec4abaSMichael Halcrow goto out; 276237fead6SMichael Halcrow } 277237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen " 278237fead6SMichael Halcrow "= [%d]\n", encoded_name, encoded_namelen); 279237fead6SMichael Halcrow lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry, 280237fead6SMichael Halcrow encoded_namelen - 1); 281237fead6SMichael Halcrow kfree(encoded_name); 282237fead6SMichael Halcrow if (IS_ERR(lower_dentry)) { 283237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n"); 284237fead6SMichael Halcrow rc = PTR_ERR(lower_dentry); 28545ec4abaSMichael Halcrow d_drop(dentry); 28645ec4abaSMichael Halcrow goto out; 287237fead6SMichael Halcrow } 28845ec4abaSMichael Halcrow lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); 289237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->" 290237fead6SMichael Halcrow "d_name.name = [%s]\n", lower_dentry, 291237fead6SMichael Halcrow lower_dentry->d_name.name); 292237fead6SMichael Halcrow lower_inode = lower_dentry->d_inode; 2930cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_atime(dir, lower_dir_dentry->d_inode); 294237fead6SMichael Halcrow BUG_ON(!atomic_read(&lower_dentry->d_count)); 295237fead6SMichael Halcrow ecryptfs_set_dentry_private(dentry, 296237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_dentry_info_cache, 297e94b1766SChristoph Lameter GFP_KERNEL)); 298237fead6SMichael Halcrow if (!ecryptfs_dentry_to_private(dentry)) { 299237fead6SMichael Halcrow rc = -ENOMEM; 300237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting " 301237fead6SMichael Halcrow "to allocate ecryptfs_dentry_info struct\n"); 302237fead6SMichael Halcrow goto out_dput; 303237fead6SMichael Halcrow } 304237fead6SMichael Halcrow ecryptfs_set_dentry_lower(dentry, lower_dentry); 305237fead6SMichael Halcrow ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); 306237fead6SMichael Halcrow if (!lower_dentry->d_inode) { 307237fead6SMichael Halcrow /* We want to add because we couldn't find in lower */ 308237fead6SMichael Halcrow d_add(dentry, NULL); 309237fead6SMichael Halcrow goto out; 310237fead6SMichael Halcrow } 311237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1); 312237fead6SMichael Halcrow if (rc) { 313237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error interposing\n"); 314237fead6SMichael Halcrow goto out_dput; 315237fead6SMichael Halcrow } 316237fead6SMichael Halcrow if (S_ISDIR(lower_inode->i_mode)) { 317237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n"); 318237fead6SMichael Halcrow goto out; 319237fead6SMichael Halcrow } 320237fead6SMichael Halcrow if (S_ISLNK(lower_inode->i_mode)) { 321237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n"); 322237fead6SMichael Halcrow goto out; 323237fead6SMichael Halcrow } 324202a21d6SRyusuke Konishi if (special_file(lower_inode->i_mode)) { 325202a21d6SRyusuke Konishi ecryptfs_printk(KERN_DEBUG, "Is a special file; returning\n"); 326202a21d6SRyusuke Konishi goto out; 327202a21d6SRyusuke Konishi } 328237fead6SMichael Halcrow if (!nd) { 329237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave" 330237fead6SMichael Halcrow "as we *think* we are about to unlink\n"); 331237fead6SMichael Halcrow goto out; 332237fead6SMichael Halcrow } 333237fead6SMichael Halcrow /* Released in this function */ 334c3762229SRobert P. J. Day page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, 335f7267c0cSChristoph Lameter GFP_USER); 336237fead6SMichael Halcrow if (!page_virt) { 337237fead6SMichael Halcrow rc = -ENOMEM; 338237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 339237fead6SMichael Halcrow "Cannot ecryptfs_kmalloc a page\n"); 340237fead6SMichael Halcrow goto out_dput; 341237fead6SMichael Halcrow } 342237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 343e2bd99ecSMichael Halcrow if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) 344237fead6SMichael Halcrow ecryptfs_set_default_sizes(crypt_stat); 345d7cdc5feSMichael Halcrow rc = ecryptfs_read_and_validate_header_region(page_virt, 346d7cdc5feSMichael Halcrow dentry->d_inode); 347237fead6SMichael Halcrow if (rc) { 348dd2a3b7aSMichael Halcrow rc = ecryptfs_read_and_validate_xattr_region(page_virt, dentry); 349dd2a3b7aSMichael Halcrow if (rc) { 350dd2a3b7aSMichael Halcrow printk(KERN_DEBUG "Valid metadata not found in header " 351dd2a3b7aSMichael Halcrow "region or xattr region; treating file as " 352dd2a3b7aSMichael Halcrow "unencrypted\n"); 353237fead6SMichael Halcrow rc = 0; 354237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 355237fead6SMichael Halcrow goto out; 356237fead6SMichael Halcrow } 357dd2a3b7aSMichael Halcrow crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR; 358dd2a3b7aSMichael Halcrow } 359e77a56ddSMichael Halcrow mount_crypt_stat = &ecryptfs_superblock_to_private( 360e77a56ddSMichael Halcrow dentry->d_sb)->mount_crypt_stat; 361e77a56ddSMichael Halcrow if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) { 362e77a56ddSMichael Halcrow if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) 363cc11beffSMichael Halcrow file_size = (crypt_stat->num_header_bytes_at_front 364e77a56ddSMichael Halcrow + i_size_read(lower_dentry->d_inode)); 365e77a56ddSMichael Halcrow else 366e77a56ddSMichael Halcrow file_size = i_size_read(lower_dentry->d_inode); 367e77a56ddSMichael Halcrow } else { 3680a688ad7SHarvey Harrison file_size = get_unaligned_be64(page_virt); 369e77a56ddSMichael Halcrow } 370237fead6SMichael Halcrow i_size_write(dentry->d_inode, (loff_t)file_size); 371237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 372237fead6SMichael Halcrow goto out; 373237fead6SMichael Halcrow 374237fead6SMichael Halcrow out_dput: 375237fead6SMichael Halcrow dput(lower_dentry); 376237fead6SMichael Halcrow d_drop(dentry); 377237fead6SMichael Halcrow out: 378237fead6SMichael Halcrow return ERR_PTR(rc); 379237fead6SMichael Halcrow } 380237fead6SMichael Halcrow 381237fead6SMichael Halcrow static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, 382237fead6SMichael Halcrow struct dentry *new_dentry) 383237fead6SMichael Halcrow { 384237fead6SMichael Halcrow struct dentry *lower_old_dentry; 385237fead6SMichael Halcrow struct dentry *lower_new_dentry; 386237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 387237fead6SMichael Halcrow u64 file_size_save; 388237fead6SMichael Halcrow int rc; 389237fead6SMichael Halcrow 390237fead6SMichael Halcrow file_size_save = i_size_read(old_dentry->d_inode); 391237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 392237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 393237fead6SMichael Halcrow dget(lower_old_dentry); 394237fead6SMichael Halcrow dget(lower_new_dentry); 395237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_new_dentry); 396237fead6SMichael Halcrow rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, 397237fead6SMichael Halcrow lower_new_dentry); 398237fead6SMichael Halcrow if (rc || !lower_new_dentry->d_inode) 399237fead6SMichael Halcrow goto out_lock; 400237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0); 401237fead6SMichael Halcrow if (rc) 402237fead6SMichael Halcrow goto out_lock; 4030cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_new_dentry->d_inode); 4040cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_new_dentry->d_inode); 405237fead6SMichael Halcrow old_dentry->d_inode->i_nlink = 406237fead6SMichael Halcrow ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink; 407237fead6SMichael Halcrow i_size_write(new_dentry->d_inode, file_size_save); 408237fead6SMichael Halcrow out_lock: 409237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 410237fead6SMichael Halcrow dput(lower_new_dentry); 411237fead6SMichael Halcrow dput(lower_old_dentry); 412ae56fb16SMichael Halcrow d_drop(lower_old_dentry); 413237fead6SMichael Halcrow d_drop(new_dentry); 41445ec4abaSMichael Halcrow d_drop(old_dentry); 415237fead6SMichael Halcrow return rc; 416237fead6SMichael Halcrow } 417237fead6SMichael Halcrow 418237fead6SMichael Halcrow static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) 419237fead6SMichael Halcrow { 420237fead6SMichael Halcrow int rc = 0; 421237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 422237fead6SMichael Halcrow struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); 4238dc4e373SMiklos Szeredi struct dentry *lower_dir_dentry; 424237fead6SMichael Halcrow 4258dc4e373SMiklos Szeredi lower_dir_dentry = lock_parent(lower_dentry); 426237fead6SMichael Halcrow rc = vfs_unlink(lower_dir_inode, lower_dentry); 427237fead6SMichael Halcrow if (rc) { 428ae56fb16SMichael Halcrow printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc); 429237fead6SMichael Halcrow goto out_unlock; 430237fead6SMichael Halcrow } 4310cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_inode); 432237fead6SMichael Halcrow dentry->d_inode->i_nlink = 433237fead6SMichael Halcrow ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; 434237fead6SMichael Halcrow dentry->d_inode->i_ctime = dir->i_ctime; 435caeeeecfSMichael Halcrow d_drop(dentry); 436237fead6SMichael Halcrow out_unlock: 4378dc4e373SMiklos Szeredi unlock_dir(lower_dir_dentry); 438237fead6SMichael Halcrow return rc; 439237fead6SMichael Halcrow } 440237fead6SMichael Halcrow 441237fead6SMichael Halcrow static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, 442237fead6SMichael Halcrow const char *symname) 443237fead6SMichael Halcrow { 444237fead6SMichael Halcrow int rc; 445237fead6SMichael Halcrow struct dentry *lower_dentry; 446237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 447237fead6SMichael Halcrow umode_t mode; 448237fead6SMichael Halcrow char *encoded_symname; 449c381bfcfSMika Kukkonen int encoded_symlen; 450237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 451237fead6SMichael Halcrow 452237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 453237fead6SMichael Halcrow dget(lower_dentry); 454237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 455237fead6SMichael Halcrow mode = S_IALLUGO; 456237fead6SMichael Halcrow encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname, 457237fead6SMichael Halcrow strlen(symname), 458237fead6SMichael Halcrow &encoded_symname); 459237fead6SMichael Halcrow if (encoded_symlen < 0) { 460237fead6SMichael Halcrow rc = encoded_symlen; 461237fead6SMichael Halcrow goto out_lock; 462237fead6SMichael Halcrow } 463237fead6SMichael Halcrow rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, 464237fead6SMichael Halcrow encoded_symname, mode); 465237fead6SMichael Halcrow kfree(encoded_symname); 466237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 467237fead6SMichael Halcrow goto out_lock; 468237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 469237fead6SMichael Halcrow if (rc) 470237fead6SMichael Halcrow goto out_lock; 4710cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 4720cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 473237fead6SMichael Halcrow out_lock: 474237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 475237fead6SMichael Halcrow dput(lower_dentry); 476237fead6SMichael Halcrow if (!dentry->d_inode) 477237fead6SMichael Halcrow d_drop(dentry); 478237fead6SMichael Halcrow return rc; 479237fead6SMichael Halcrow } 480237fead6SMichael Halcrow 481237fead6SMichael Halcrow static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 482237fead6SMichael Halcrow { 483237fead6SMichael Halcrow int rc; 484237fead6SMichael Halcrow struct dentry *lower_dentry; 485237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 486237fead6SMichael Halcrow 487237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 488237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 489237fead6SMichael Halcrow rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); 490237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 491237fead6SMichael Halcrow goto out; 492237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 493237fead6SMichael Halcrow if (rc) 494237fead6SMichael Halcrow goto out; 4950cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 4960cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 497237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 498237fead6SMichael Halcrow out: 499237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 500237fead6SMichael Halcrow if (!dentry->d_inode) 501237fead6SMichael Halcrow d_drop(dentry); 502237fead6SMichael Halcrow return rc; 503237fead6SMichael Halcrow } 504237fead6SMichael Halcrow 505237fead6SMichael Halcrow static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) 506237fead6SMichael Halcrow { 507237fead6SMichael Halcrow struct dentry *lower_dentry; 508237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 50945ec4abaSMichael Halcrow int rc; 510237fead6SMichael Halcrow 511237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 51245ec4abaSMichael Halcrow dget(dentry); 513237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 51445ec4abaSMichael Halcrow dget(lower_dentry); 515237fead6SMichael Halcrow rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); 51645ec4abaSMichael Halcrow dput(lower_dentry); 51745ec4abaSMichael Halcrow if (!rc) 51845ec4abaSMichael Halcrow d_delete(lower_dentry); 5190cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 520237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 521237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 522237fead6SMichael Halcrow if (!rc) 523237fead6SMichael Halcrow d_drop(dentry); 52445ec4abaSMichael Halcrow dput(dentry); 525237fead6SMichael Halcrow return rc; 526237fead6SMichael Halcrow } 527237fead6SMichael Halcrow 528237fead6SMichael Halcrow static int 529237fead6SMichael Halcrow ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) 530237fead6SMichael Halcrow { 531237fead6SMichael Halcrow int rc; 532237fead6SMichael Halcrow struct dentry *lower_dentry; 533237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 534237fead6SMichael Halcrow 535237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 536237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 537237fead6SMichael Halcrow rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); 538237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 539237fead6SMichael Halcrow goto out; 540237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 541237fead6SMichael Halcrow if (rc) 542237fead6SMichael Halcrow goto out; 5430cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 5440cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 545237fead6SMichael Halcrow out: 546237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 547237fead6SMichael Halcrow if (!dentry->d_inode) 548237fead6SMichael Halcrow d_drop(dentry); 549237fead6SMichael Halcrow return rc; 550237fead6SMichael Halcrow } 551237fead6SMichael Halcrow 552237fead6SMichael Halcrow static int 553237fead6SMichael Halcrow ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, 554237fead6SMichael Halcrow struct inode *new_dir, struct dentry *new_dentry) 555237fead6SMichael Halcrow { 556237fead6SMichael Halcrow int rc; 557237fead6SMichael Halcrow struct dentry *lower_old_dentry; 558237fead6SMichael Halcrow struct dentry *lower_new_dentry; 559237fead6SMichael Halcrow struct dentry *lower_old_dir_dentry; 560237fead6SMichael Halcrow struct dentry *lower_new_dir_dentry; 561237fead6SMichael Halcrow 562237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 563237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 564237fead6SMichael Halcrow dget(lower_old_dentry); 565237fead6SMichael Halcrow dget(lower_new_dentry); 566237fead6SMichael Halcrow lower_old_dir_dentry = dget_parent(lower_old_dentry); 567237fead6SMichael Halcrow lower_new_dir_dentry = dget_parent(lower_new_dentry); 568237fead6SMichael Halcrow lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 569237fead6SMichael Halcrow rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, 570237fead6SMichael Halcrow lower_new_dir_dentry->d_inode, lower_new_dentry); 571237fead6SMichael Halcrow if (rc) 572237fead6SMichael Halcrow goto out_lock; 5730cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL); 574237fead6SMichael Halcrow if (new_dir != old_dir) 5750cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL); 576237fead6SMichael Halcrow out_lock: 577237fead6SMichael Halcrow unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 578a9083081SMichael Halcrow dput(lower_new_dentry->d_parent); 579a9083081SMichael Halcrow dput(lower_old_dentry->d_parent); 580237fead6SMichael Halcrow dput(lower_new_dentry); 581237fead6SMichael Halcrow dput(lower_old_dentry); 582237fead6SMichael Halcrow return rc; 583237fead6SMichael Halcrow } 584237fead6SMichael Halcrow 585237fead6SMichael Halcrow static int 586237fead6SMichael Halcrow ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz) 587237fead6SMichael Halcrow { 588237fead6SMichael Halcrow int rc; 589237fead6SMichael Halcrow struct dentry *lower_dentry; 590237fead6SMichael Halcrow char *decoded_name; 591237fead6SMichael Halcrow char *lower_buf; 592237fead6SMichael Halcrow mm_segment_t old_fs; 593237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 594237fead6SMichael Halcrow 595237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 596237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op || 597237fead6SMichael Halcrow !lower_dentry->d_inode->i_op->readlink) { 598237fead6SMichael Halcrow rc = -EINVAL; 599237fead6SMichael Halcrow goto out; 600237fead6SMichael Halcrow } 601237fead6SMichael Halcrow /* Released in this function */ 602237fead6SMichael Halcrow lower_buf = kmalloc(bufsiz, GFP_KERNEL); 603237fead6SMichael Halcrow if (lower_buf == NULL) { 604237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory\n"); 605237fead6SMichael Halcrow rc = -ENOMEM; 606237fead6SMichael Halcrow goto out; 607237fead6SMichael Halcrow } 608237fead6SMichael Halcrow old_fs = get_fs(); 609237fead6SMichael Halcrow set_fs(get_ds()); 610237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 611237fead6SMichael Halcrow "lower_dentry->d_name.name = [%s]\n", 612237fead6SMichael Halcrow lower_dentry->d_name.name); 613237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, 614237fead6SMichael Halcrow (char __user *)lower_buf, 615237fead6SMichael Halcrow bufsiz); 616237fead6SMichael Halcrow set_fs(old_fs); 617237fead6SMichael Halcrow if (rc >= 0) { 618237fead6SMichael Halcrow crypt_stat = NULL; 619237fead6SMichael Halcrow rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc, 620237fead6SMichael Halcrow &decoded_name); 621237fead6SMichael Halcrow if (rc == -ENOMEM) 622237fead6SMichael Halcrow goto out_free_lower_buf; 623237fead6SMichael Halcrow if (rc > 0) { 624237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes " 625237fead6SMichael Halcrow "to userspace: [%*s]\n", rc, 626237fead6SMichael Halcrow decoded_name); 627237fead6SMichael Halcrow if (copy_to_user(buf, decoded_name, rc)) 628237fead6SMichael Halcrow rc = -EFAULT; 629237fead6SMichael Halcrow } 630237fead6SMichael Halcrow kfree(decoded_name); 6310cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_atime(dentry->d_inode, 632237fead6SMichael Halcrow lower_dentry->d_inode); 633237fead6SMichael Halcrow } 634237fead6SMichael Halcrow out_free_lower_buf: 635237fead6SMichael Halcrow kfree(lower_buf); 636237fead6SMichael Halcrow out: 637237fead6SMichael Halcrow return rc; 638237fead6SMichael Halcrow } 639237fead6SMichael Halcrow 640237fead6SMichael Halcrow static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) 641237fead6SMichael Halcrow { 642237fead6SMichael Halcrow char *buf; 643237fead6SMichael Halcrow int len = PAGE_SIZE, rc; 644237fead6SMichael Halcrow mm_segment_t old_fs; 645237fead6SMichael Halcrow 646237fead6SMichael Halcrow /* Released in ecryptfs_put_link(); only release here on error */ 647237fead6SMichael Halcrow buf = kmalloc(len, GFP_KERNEL); 648237fead6SMichael Halcrow if (!buf) { 649237fead6SMichael Halcrow rc = -ENOMEM; 650237fead6SMichael Halcrow goto out; 651237fead6SMichael Halcrow } 652237fead6SMichael Halcrow old_fs = get_fs(); 653237fead6SMichael Halcrow set_fs(get_ds()); 654237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 655237fead6SMichael Halcrow "dentry->d_name.name = [%s]\n", dentry->d_name.name); 656237fead6SMichael Halcrow rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len); 657237fead6SMichael Halcrow buf[rc] = '\0'; 658237fead6SMichael Halcrow set_fs(old_fs); 659237fead6SMichael Halcrow if (rc < 0) 660237fead6SMichael Halcrow goto out_free; 661237fead6SMichael Halcrow rc = 0; 662237fead6SMichael Halcrow nd_set_link(nd, buf); 663237fead6SMichael Halcrow goto out; 664237fead6SMichael Halcrow out_free: 665237fead6SMichael Halcrow kfree(buf); 666237fead6SMichael Halcrow out: 667237fead6SMichael Halcrow return ERR_PTR(rc); 668237fead6SMichael Halcrow } 669237fead6SMichael Halcrow 670237fead6SMichael Halcrow static void 671237fead6SMichael Halcrow ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) 672237fead6SMichael Halcrow { 673237fead6SMichael Halcrow /* Free the char* */ 674237fead6SMichael Halcrow kfree(nd_get_link(nd)); 675237fead6SMichael Halcrow } 676237fead6SMichael Halcrow 677237fead6SMichael Halcrow /** 678237fead6SMichael Halcrow * upper_size_to_lower_size 679237fead6SMichael Halcrow * @crypt_stat: Crypt_stat associated with file 680237fead6SMichael Halcrow * @upper_size: Size of the upper file 681237fead6SMichael Halcrow * 682cc11beffSMichael Halcrow * Calculate the required size of the lower file based on the 683237fead6SMichael Halcrow * specified size of the upper file. This calculation is based on the 684237fead6SMichael Halcrow * number of headers in the underlying file and the extent size. 685237fead6SMichael Halcrow * 686237fead6SMichael Halcrow * Returns Calculated size of the lower file. 687237fead6SMichael Halcrow */ 688237fead6SMichael Halcrow static loff_t 689237fead6SMichael Halcrow upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, 690237fead6SMichael Halcrow loff_t upper_size) 691237fead6SMichael Halcrow { 692237fead6SMichael Halcrow loff_t lower_size; 693237fead6SMichael Halcrow 694cc11beffSMichael Halcrow lower_size = crypt_stat->num_header_bytes_at_front; 695237fead6SMichael Halcrow if (upper_size != 0) { 696237fead6SMichael Halcrow loff_t num_extents; 697237fead6SMichael Halcrow 698237fead6SMichael Halcrow num_extents = upper_size >> crypt_stat->extent_shift; 699237fead6SMichael Halcrow if (upper_size & ~crypt_stat->extent_mask) 700237fead6SMichael Halcrow num_extents++; 701237fead6SMichael Halcrow lower_size += (num_extents * crypt_stat->extent_size); 702237fead6SMichael Halcrow } 703237fead6SMichael Halcrow return lower_size; 704237fead6SMichael Halcrow } 705237fead6SMichael Halcrow 706237fead6SMichael Halcrow /** 707237fead6SMichael Halcrow * ecryptfs_truncate 708237fead6SMichael Halcrow * @dentry: The ecryptfs layer dentry 709237fead6SMichael Halcrow * @new_length: The length to expand the file to 710237fead6SMichael Halcrow * 711237fead6SMichael Halcrow * Function to handle truncations modifying the size of the file. Note 712237fead6SMichael Halcrow * that the file sizes are interpolated. When expanding, we are simply 713237fead6SMichael Halcrow * writing strings of 0's out. When truncating, we need to modify the 714237fead6SMichael Halcrow * underlying file size according to the page index interpolations. 715237fead6SMichael Halcrow * 716237fead6SMichael Halcrow * Returns zero on success; non-zero otherwise 717237fead6SMichael Halcrow */ 718237fead6SMichael Halcrow int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) 719237fead6SMichael Halcrow { 720237fead6SMichael Halcrow int rc = 0; 721237fead6SMichael Halcrow struct inode *inode = dentry->d_inode; 722237fead6SMichael Halcrow struct dentry *lower_dentry; 7232ed92554SMichael Halcrow struct file fake_ecryptfs_file; 724237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 725237fead6SMichael Halcrow loff_t i_size = i_size_read(inode); 726237fead6SMichael Halcrow loff_t lower_size_before_truncate; 727237fead6SMichael Halcrow loff_t lower_size_after_truncate; 728237fead6SMichael Halcrow 729237fead6SMichael Halcrow if (unlikely((new_length == i_size))) 730237fead6SMichael Halcrow goto out; 731237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 732237fead6SMichael Halcrow /* Set up a fake ecryptfs file, this is used to interface with 733237fead6SMichael Halcrow * the file in the underlying filesystem so that the 734237fead6SMichael Halcrow * truncation has an effect there as well. */ 735237fead6SMichael Halcrow memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file)); 736bd243a4bSJosef "Jeff" Sipek fake_ecryptfs_file.f_path.dentry = dentry; 737237fead6SMichael Halcrow /* Released at out_free: label */ 738237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_ecryptfs_file, 739237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_file_info_cache, 740e94b1766SChristoph Lameter GFP_KERNEL)); 741237fead6SMichael Halcrow if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) { 742237fead6SMichael Halcrow rc = -ENOMEM; 743237fead6SMichael Halcrow goto out; 744237fead6SMichael Halcrow } 745237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 7462ed92554SMichael Halcrow ecryptfs_set_file_lower( 7472ed92554SMichael Halcrow &fake_ecryptfs_file, 7482ed92554SMichael Halcrow ecryptfs_inode_to_private(dentry->d_inode)->lower_file); 749237fead6SMichael Halcrow /* Switch on growing or shrinking file */ 750237fead6SMichael Halcrow if (new_length > i_size) { 7512ed92554SMichael Halcrow char zero[] = { 0x00 }; 752240e2df5SMichael Halcrow 7532ed92554SMichael Halcrow /* Write a single 0 at the last position of the file; 7542ed92554SMichael Halcrow * this triggers code that will fill in 0's throughout 7552ed92554SMichael Halcrow * the intermediate portion of the previous end of the 7562ed92554SMichael Halcrow * file and the new and of the file */ 7572ed92554SMichael Halcrow rc = ecryptfs_write(&fake_ecryptfs_file, zero, 7582ed92554SMichael Halcrow (new_length - 1), 1); 7592ed92554SMichael Halcrow } else { /* new_length < i_size_read(inode) */ 7602ed92554SMichael Halcrow /* We're chopping off all the pages down do the page 7612ed92554SMichael Halcrow * in which new_length is located. Fill in the end of 7622ed92554SMichael Halcrow * that page from (new_length & ~PAGE_CACHE_MASK) to 7632ed92554SMichael Halcrow * PAGE_CACHE_SIZE with zeros. */ 7642ed92554SMichael Halcrow size_t num_zeros = (PAGE_CACHE_SIZE 7652ed92554SMichael Halcrow - (new_length & ~PAGE_CACHE_MASK)); 7662ed92554SMichael Halcrow 7672ed92554SMichael Halcrow if (num_zeros) { 7682ed92554SMichael Halcrow char *zeros_virt; 7692ed92554SMichael Halcrow 7702ed92554SMichael Halcrow zeros_virt = kzalloc(num_zeros, GFP_KERNEL); 7712ed92554SMichael Halcrow if (!zeros_virt) { 7722ed92554SMichael Halcrow rc = -ENOMEM; 7732ed92554SMichael Halcrow goto out_free; 774240e2df5SMichael Halcrow } 7752ed92554SMichael Halcrow rc = ecryptfs_write(&fake_ecryptfs_file, zeros_virt, 7762ed92554SMichael Halcrow new_length, num_zeros); 7772ed92554SMichael Halcrow kfree(zeros_virt); 7785dda6992SMichael Halcrow if (rc) { 779240e2df5SMichael Halcrow printk(KERN_ERR "Error attempting to zero out " 780240e2df5SMichael Halcrow "the remainder of the end page on " 781240e2df5SMichael Halcrow "reducing truncate; rc = [%d]\n", rc); 7822ed92554SMichael Halcrow goto out_free; 783240e2df5SMichael Halcrow } 784240e2df5SMichael Halcrow } 785237fead6SMichael Halcrow vmtruncate(inode, new_length); 7860216f7f7SMichael Halcrow rc = ecryptfs_write_inode_size_to_metadata(inode); 787dd2a3b7aSMichael Halcrow if (rc) { 788dd2a3b7aSMichael Halcrow printk(KERN_ERR "Problem with " 789dd2a3b7aSMichael Halcrow "ecryptfs_write_inode_size_to_metadata; " 790dd2a3b7aSMichael Halcrow "rc = [%d]\n", rc); 7912ed92554SMichael Halcrow goto out_free; 792dd2a3b7aSMichael Halcrow } 793237fead6SMichael Halcrow /* We are reducing the size of the ecryptfs file, and need to 794237fead6SMichael Halcrow * know if we need to reduce the size of the lower file. */ 795237fead6SMichael Halcrow lower_size_before_truncate = 796237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, i_size); 797237fead6SMichael Halcrow lower_size_after_truncate = 798237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, new_length); 799237fead6SMichael Halcrow if (lower_size_after_truncate < lower_size_before_truncate) 800237fead6SMichael Halcrow vmtruncate(lower_dentry->d_inode, 801237fead6SMichael Halcrow lower_size_after_truncate); 802237fead6SMichael Halcrow } 803237fead6SMichael Halcrow out_free: 804237fead6SMichael Halcrow if (ecryptfs_file_to_private(&fake_ecryptfs_file)) 805237fead6SMichael Halcrow kmem_cache_free(ecryptfs_file_info_cache, 806237fead6SMichael Halcrow ecryptfs_file_to_private(&fake_ecryptfs_file)); 807237fead6SMichael Halcrow out: 808237fead6SMichael Halcrow return rc; 809237fead6SMichael Halcrow } 810237fead6SMichael Halcrow 811237fead6SMichael Halcrow static int 812237fead6SMichael Halcrow ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd) 813237fead6SMichael Halcrow { 814237fead6SMichael Halcrow int rc; 815237fead6SMichael Halcrow 816237fead6SMichael Halcrow if (nd) { 8174ac91378SJan Blunck struct vfsmount *vfsmnt_save = nd->path.mnt; 8184ac91378SJan Blunck struct dentry *dentry_save = nd->path.dentry; 819237fead6SMichael Halcrow 8204ac91378SJan Blunck nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry); 8214ac91378SJan Blunck nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry); 822237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, nd); 8234ac91378SJan Blunck nd->path.mnt = vfsmnt_save; 8244ac91378SJan Blunck nd->path.dentry = dentry_save; 825237fead6SMichael Halcrow } else 826237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL); 827237fead6SMichael Halcrow return rc; 828237fead6SMichael Halcrow } 829237fead6SMichael Halcrow 830237fead6SMichael Halcrow /** 831237fead6SMichael Halcrow * ecryptfs_setattr 832237fead6SMichael Halcrow * @dentry: dentry handle to the inode to modify 833237fead6SMichael Halcrow * @ia: Structure with flags of what to change and values 834237fead6SMichael Halcrow * 835237fead6SMichael Halcrow * Updates the metadata of an inode. If the update is to the size 836237fead6SMichael Halcrow * i.e. truncation, then ecryptfs_truncate will handle the size modification 837237fead6SMichael Halcrow * of both the ecryptfs inode and the lower inode. 838237fead6SMichael Halcrow * 839237fead6SMichael Halcrow * All other metadata changes will be passed right to the lower filesystem, 840237fead6SMichael Halcrow * and we will just update our inode to look like the lower. 841237fead6SMichael Halcrow */ 842237fead6SMichael Halcrow static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) 843237fead6SMichael Halcrow { 844237fead6SMichael Halcrow int rc = 0; 845237fead6SMichael Halcrow struct dentry *lower_dentry; 846237fead6SMichael Halcrow struct inode *inode; 847237fead6SMichael Halcrow struct inode *lower_inode; 848237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 849237fead6SMichael Halcrow 850237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 851e10f281bSMichael Halcrow if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) 852e10f281bSMichael Halcrow ecryptfs_init_crypt_stat(crypt_stat); 853237fead6SMichael Halcrow inode = dentry->d_inode; 854237fead6SMichael Halcrow lower_inode = ecryptfs_inode_to_lower(inode); 855e10f281bSMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 856e10f281bSMichael Halcrow mutex_lock(&crypt_stat->cs_mutex); 857e10f281bSMichael Halcrow if (S_ISDIR(dentry->d_inode->i_mode)) 858e10f281bSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 85964ee4808SMichael Halcrow else if (S_ISREG(dentry->d_inode->i_mode) 86064ee4808SMichael Halcrow && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED) 86164ee4808SMichael Halcrow || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) { 862e10f281bSMichael Halcrow struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 863e10f281bSMichael Halcrow 864e10f281bSMichael Halcrow mount_crypt_stat = &ecryptfs_superblock_to_private( 865e10f281bSMichael Halcrow dentry->d_sb)->mount_crypt_stat; 866d7cdc5feSMichael Halcrow rc = ecryptfs_read_metadata(dentry); 8675dda6992SMichael Halcrow if (rc) { 868e10f281bSMichael Halcrow if (!(mount_crypt_stat->flags 869e10f281bSMichael Halcrow & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) { 870e10f281bSMichael Halcrow rc = -EIO; 87125bd8174SMichael Halcrow printk(KERN_WARNING "Either the lower file " 872e10f281bSMichael Halcrow "is not in a valid eCryptfs format, " 87325bd8174SMichael Halcrow "or the key could not be retrieved. " 87425bd8174SMichael Halcrow "Plaintext passthrough mode is not " 875e10f281bSMichael Halcrow "enabled; returning -EIO\n"); 876e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 877e10f281bSMichael Halcrow goto out; 878e10f281bSMichael Halcrow } 879e10f281bSMichael Halcrow rc = 0; 880e10f281bSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 881e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 882e10f281bSMichael Halcrow goto out; 883e10f281bSMichael Halcrow } 884e10f281bSMichael Halcrow } 885e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 886237fead6SMichael Halcrow if (ia->ia_valid & ATTR_SIZE) { 887237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, 888237fead6SMichael Halcrow "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n", 889237fead6SMichael Halcrow ia->ia_valid, ATTR_SIZE); 890237fead6SMichael Halcrow rc = ecryptfs_truncate(dentry, ia->ia_size); 891237fead6SMichael Halcrow /* ecryptfs_truncate handles resizing of the lower file */ 892237fead6SMichael Halcrow ia->ia_valid &= ~ATTR_SIZE; 893237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n", 894237fead6SMichael Halcrow ia->ia_valid); 895237fead6SMichael Halcrow if (rc < 0) 896237fead6SMichael Halcrow goto out; 897237fead6SMichael Halcrow } 8981ac564ecSJeff Layton 8991ac564ecSJeff Layton /* 9001ac564ecSJeff Layton * mode change is for clearing setuid/setgid bits. Allow lower fs 9011ac564ecSJeff Layton * to interpret this in its own way. 9021ac564ecSJeff Layton */ 9031ac564ecSJeff Layton if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) 9041ac564ecSJeff Layton ia->ia_valid &= ~ATTR_MODE; 9051ac564ecSJeff Layton 9069c3580aaSMiklos Szeredi mutex_lock(&lower_dentry->d_inode->i_mutex); 907237fead6SMichael Halcrow rc = notify_change(lower_dentry, ia); 9089c3580aaSMiklos Szeredi mutex_unlock(&lower_dentry->d_inode->i_mutex); 909237fead6SMichael Halcrow out: 9100cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(inode, lower_inode, NULL); 911237fead6SMichael Halcrow return rc; 912237fead6SMichael Halcrow } 913237fead6SMichael Halcrow 914dd2a3b7aSMichael Halcrow int 915237fead6SMichael Halcrow ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, 916237fead6SMichael Halcrow size_t size, int flags) 917237fead6SMichael Halcrow { 918237fead6SMichael Halcrow int rc = 0; 919237fead6SMichael Halcrow struct dentry *lower_dentry; 920237fead6SMichael Halcrow 921237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 922237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->setxattr) { 923237fead6SMichael Halcrow rc = -ENOSYS; 924237fead6SMichael Halcrow goto out; 925237fead6SMichael Halcrow } 926237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 927237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, 928237fead6SMichael Halcrow size, flags); 929237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 930237fead6SMichael Halcrow out: 931237fead6SMichael Halcrow return rc; 932237fead6SMichael Halcrow } 933237fead6SMichael Halcrow 934dd2a3b7aSMichael Halcrow ssize_t 935d7cdc5feSMichael Halcrow ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, 936d7cdc5feSMichael Halcrow void *value, size_t size) 937d7cdc5feSMichael Halcrow { 938d7cdc5feSMichael Halcrow int rc = 0; 939d7cdc5feSMichael Halcrow 940d7cdc5feSMichael Halcrow if (!lower_dentry->d_inode->i_op->getxattr) { 941d7cdc5feSMichael Halcrow rc = -ENOSYS; 942d7cdc5feSMichael Halcrow goto out; 943d7cdc5feSMichael Halcrow } 944d7cdc5feSMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 945d7cdc5feSMichael Halcrow rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, 946d7cdc5feSMichael Halcrow size); 947d7cdc5feSMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 948d7cdc5feSMichael Halcrow out: 949d7cdc5feSMichael Halcrow return rc; 950d7cdc5feSMichael Halcrow } 951d7cdc5feSMichael Halcrow 9527896b631SAdrian Bunk static ssize_t 953237fead6SMichael Halcrow ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, 954237fead6SMichael Halcrow size_t size) 955237fead6SMichael Halcrow { 9562ed92554SMichael Halcrow return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name, 9572ed92554SMichael Halcrow value, size); 958237fead6SMichael Halcrow } 959237fead6SMichael Halcrow 960237fead6SMichael Halcrow static ssize_t 961237fead6SMichael Halcrow ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) 962237fead6SMichael Halcrow { 963237fead6SMichael Halcrow int rc = 0; 964237fead6SMichael Halcrow struct dentry *lower_dentry; 965237fead6SMichael Halcrow 966237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 967237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->listxattr) { 968237fead6SMichael Halcrow rc = -ENOSYS; 969237fead6SMichael Halcrow goto out; 970237fead6SMichael Halcrow } 971237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 972237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size); 973237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 974237fead6SMichael Halcrow out: 975237fead6SMichael Halcrow return rc; 976237fead6SMichael Halcrow } 977237fead6SMichael Halcrow 978237fead6SMichael Halcrow static int ecryptfs_removexattr(struct dentry *dentry, const char *name) 979237fead6SMichael Halcrow { 980237fead6SMichael Halcrow int rc = 0; 981237fead6SMichael Halcrow struct dentry *lower_dentry; 982237fead6SMichael Halcrow 983237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 984237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->removexattr) { 985237fead6SMichael Halcrow rc = -ENOSYS; 986237fead6SMichael Halcrow goto out; 987237fead6SMichael Halcrow } 988237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 989237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); 990237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 991237fead6SMichael Halcrow out: 992237fead6SMichael Halcrow return rc; 993237fead6SMichael Halcrow } 994237fead6SMichael Halcrow 995237fead6SMichael Halcrow int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode) 996237fead6SMichael Halcrow { 997237fead6SMichael Halcrow if ((ecryptfs_inode_to_lower(inode) 998237fead6SMichael Halcrow == (struct inode *)candidate_lower_inode)) 999237fead6SMichael Halcrow return 1; 1000237fead6SMichael Halcrow else 1001237fead6SMichael Halcrow return 0; 1002237fead6SMichael Halcrow } 1003237fead6SMichael Halcrow 1004237fead6SMichael Halcrow int ecryptfs_inode_set(struct inode *inode, void *lower_inode) 1005237fead6SMichael Halcrow { 1006237fead6SMichael Halcrow ecryptfs_init_inode(inode, (struct inode *)lower_inode); 1007237fead6SMichael Halcrow return 0; 1008237fead6SMichael Halcrow } 1009237fead6SMichael Halcrow 1010754661f1SArjan van de Ven const struct inode_operations ecryptfs_symlink_iops = { 1011237fead6SMichael Halcrow .readlink = ecryptfs_readlink, 1012237fead6SMichael Halcrow .follow_link = ecryptfs_follow_link, 1013237fead6SMichael Halcrow .put_link = ecryptfs_put_link, 1014237fead6SMichael Halcrow .permission = ecryptfs_permission, 1015237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1016237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1017237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1018237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1019237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1020237fead6SMichael Halcrow }; 1021237fead6SMichael Halcrow 1022754661f1SArjan van de Ven const struct inode_operations ecryptfs_dir_iops = { 1023237fead6SMichael Halcrow .create = ecryptfs_create, 1024237fead6SMichael Halcrow .lookup = ecryptfs_lookup, 1025237fead6SMichael Halcrow .link = ecryptfs_link, 1026237fead6SMichael Halcrow .unlink = ecryptfs_unlink, 1027237fead6SMichael Halcrow .symlink = ecryptfs_symlink, 1028237fead6SMichael Halcrow .mkdir = ecryptfs_mkdir, 1029237fead6SMichael Halcrow .rmdir = ecryptfs_rmdir, 1030237fead6SMichael Halcrow .mknod = ecryptfs_mknod, 1031237fead6SMichael Halcrow .rename = ecryptfs_rename, 1032237fead6SMichael Halcrow .permission = ecryptfs_permission, 1033237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1034237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1035237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1036237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1037237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1038237fead6SMichael Halcrow }; 1039237fead6SMichael Halcrow 1040754661f1SArjan van de Ven const struct inode_operations ecryptfs_main_iops = { 1041237fead6SMichael Halcrow .permission = ecryptfs_permission, 1042237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1043237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1044237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1045237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1046237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1047237fead6SMichael Halcrow }; 1048