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 } 192391b52f9SMichael Halcrow if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) { 193391b52f9SMichael Halcrow rc = ecryptfs_init_persistent_file(ecryptfs_dentry); 194391b52f9SMichael Halcrow if (rc) { 195391b52f9SMichael Halcrow printk(KERN_ERR "%s: Error attempting to initialize " 196391b52f9SMichael Halcrow "the persistent file for the dentry with name " 197391b52f9SMichael Halcrow "[%s]; rc = [%d]\n", __func__, 198391b52f9SMichael Halcrow ecryptfs_dentry->d_name.name, rc); 199391b52f9SMichael Halcrow goto out; 200391b52f9SMichael Halcrow } 201391b52f9SMichael Halcrow } 202d7cdc5feSMichael Halcrow rc = ecryptfs_write_metadata(ecryptfs_dentry); 203237fead6SMichael Halcrow if (rc) { 204d7cdc5feSMichael Halcrow printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc); 205d7cdc5feSMichael Halcrow goto out; 206237fead6SMichael Halcrow } 207d7cdc5feSMichael Halcrow rc = grow_file(ecryptfs_dentry); 2085dda6992SMichael Halcrow if (rc) 209d7cdc5feSMichael Halcrow printk(KERN_ERR "Error growing file; rc = [%d]\n", rc); 210237fead6SMichael Halcrow out: 211237fead6SMichael Halcrow return rc; 212237fead6SMichael Halcrow } 213237fead6SMichael Halcrow 214237fead6SMichael Halcrow /** 215237fead6SMichael Halcrow * ecryptfs_create 216237fead6SMichael Halcrow * @dir: The inode of the directory in which to create the file. 217237fead6SMichael Halcrow * @dentry: The eCryptfs dentry 218237fead6SMichael Halcrow * @mode: The mode of the new file. 219237fead6SMichael Halcrow * @nd: nameidata 220237fead6SMichael Halcrow * 221237fead6SMichael Halcrow * Creates a new file. 222237fead6SMichael Halcrow * 223237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 224237fead6SMichael Halcrow */ 225237fead6SMichael Halcrow static int 226237fead6SMichael Halcrow ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, 227237fead6SMichael Halcrow int mode, struct nameidata *nd) 228237fead6SMichael Halcrow { 229237fead6SMichael Halcrow int rc; 230237fead6SMichael Halcrow 2314981e081SMichael Halcrow /* ecryptfs_do_create() calls ecryptfs_interpose(), which opens 2324981e081SMichael Halcrow * the crypt_stat->lower_file (persistent file) */ 233237fead6SMichael Halcrow rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd); 234237fead6SMichael Halcrow if (unlikely(rc)) { 235237fead6SMichael Halcrow ecryptfs_printk(KERN_WARNING, "Failed to create file in" 236237fead6SMichael Halcrow "lower filesystem\n"); 237237fead6SMichael Halcrow goto out; 238237fead6SMichael Halcrow } 239237fead6SMichael Halcrow /* At this point, a file exists on "disk"; we need to make sure 240237fead6SMichael Halcrow * that this on disk file is prepared to be an ecryptfs file */ 241237fead6SMichael Halcrow rc = ecryptfs_initialize_file(ecryptfs_dentry); 242237fead6SMichael Halcrow out: 243237fead6SMichael Halcrow return rc; 244237fead6SMichael Halcrow } 245237fead6SMichael Halcrow 246237fead6SMichael Halcrow /** 247237fead6SMichael Halcrow * ecryptfs_lookup 248237fead6SMichael Halcrow * @dir: inode 249237fead6SMichael Halcrow * @dentry: The dentry 250237fead6SMichael Halcrow * @nd: nameidata, may be NULL 251237fead6SMichael Halcrow * 252237fead6SMichael Halcrow * Find a file on disk. If the file does not exist, then we'll add it to the 253237fead6SMichael Halcrow * dentry cache and continue on to read it from the disk. 254237fead6SMichael Halcrow */ 255237fead6SMichael Halcrow static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry, 256237fead6SMichael Halcrow struct nameidata *nd) 257237fead6SMichael Halcrow { 258237fead6SMichael Halcrow int rc = 0; 259237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 260237fead6SMichael Halcrow struct dentry *lower_dentry; 261237fead6SMichael Halcrow struct vfsmount *lower_mnt; 262237fead6SMichael Halcrow char *encoded_name; 263c381bfcfSMika Kukkonen int encoded_namelen; 264237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 265e77a56ddSMichael Halcrow struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 266237fead6SMichael Halcrow char *page_virt = NULL; 267237fead6SMichael Halcrow struct inode *lower_inode; 268237fead6SMichael Halcrow u64 file_size; 269237fead6SMichael Halcrow 270237fead6SMichael Halcrow lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent); 271237fead6SMichael Halcrow dentry->d_op = &ecryptfs_dops; 272237fead6SMichael Halcrow if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, ".")) 27345ec4abaSMichael Halcrow || (dentry->d_name.len == 2 27445ec4abaSMichael Halcrow && !strcmp(dentry->d_name.name, ".."))) { 27545ec4abaSMichael Halcrow d_drop(dentry); 27645ec4abaSMichael Halcrow goto out; 27745ec4abaSMichael Halcrow } 278237fead6SMichael Halcrow encoded_namelen = ecryptfs_encode_filename(crypt_stat, 279237fead6SMichael Halcrow dentry->d_name.name, 280237fead6SMichael Halcrow dentry->d_name.len, 281237fead6SMichael Halcrow &encoded_name); 282237fead6SMichael Halcrow if (encoded_namelen < 0) { 283237fead6SMichael Halcrow rc = encoded_namelen; 28445ec4abaSMichael Halcrow d_drop(dentry); 28545ec4abaSMichael Halcrow goto out; 286237fead6SMichael Halcrow } 287237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen " 288237fead6SMichael Halcrow "= [%d]\n", encoded_name, encoded_namelen); 289237fead6SMichael Halcrow lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry, 290237fead6SMichael Halcrow encoded_namelen - 1); 291237fead6SMichael Halcrow kfree(encoded_name); 292237fead6SMichael Halcrow if (IS_ERR(lower_dentry)) { 293237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n"); 294237fead6SMichael Halcrow rc = PTR_ERR(lower_dentry); 29545ec4abaSMichael Halcrow d_drop(dentry); 29645ec4abaSMichael Halcrow goto out; 297237fead6SMichael Halcrow } 29845ec4abaSMichael Halcrow lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); 299237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->" 300237fead6SMichael Halcrow "d_name.name = [%s]\n", lower_dentry, 301237fead6SMichael Halcrow lower_dentry->d_name.name); 302237fead6SMichael Halcrow lower_inode = lower_dentry->d_inode; 3030cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_atime(dir, lower_dir_dentry->d_inode); 304237fead6SMichael Halcrow BUG_ON(!atomic_read(&lower_dentry->d_count)); 305237fead6SMichael Halcrow ecryptfs_set_dentry_private(dentry, 306237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_dentry_info_cache, 307e94b1766SChristoph Lameter GFP_KERNEL)); 308237fead6SMichael Halcrow if (!ecryptfs_dentry_to_private(dentry)) { 309237fead6SMichael Halcrow rc = -ENOMEM; 310237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting " 311237fead6SMichael Halcrow "to allocate ecryptfs_dentry_info struct\n"); 312237fead6SMichael Halcrow goto out_dput; 313237fead6SMichael Halcrow } 314237fead6SMichael Halcrow ecryptfs_set_dentry_lower(dentry, lower_dentry); 315237fead6SMichael Halcrow ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); 316237fead6SMichael Halcrow if (!lower_dentry->d_inode) { 317237fead6SMichael Halcrow /* We want to add because we couldn't find in lower */ 318237fead6SMichael Halcrow d_add(dentry, NULL); 319237fead6SMichael Halcrow goto out; 320237fead6SMichael Halcrow } 32172b55fffSMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 32272b55fffSMichael Halcrow ECRYPTFS_INTERPOSE_FLAG_D_ADD); 323237fead6SMichael Halcrow if (rc) { 324237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error interposing\n"); 325391b52f9SMichael Halcrow goto out; 326237fead6SMichael Halcrow } 327237fead6SMichael Halcrow if (S_ISDIR(lower_inode->i_mode)) { 328237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n"); 329237fead6SMichael Halcrow goto out; 330237fead6SMichael Halcrow } 331237fead6SMichael Halcrow if (S_ISLNK(lower_inode->i_mode)) { 332237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n"); 333237fead6SMichael Halcrow goto out; 334237fead6SMichael Halcrow } 335202a21d6SRyusuke Konishi if (special_file(lower_inode->i_mode)) { 336202a21d6SRyusuke Konishi ecryptfs_printk(KERN_DEBUG, "Is a special file; returning\n"); 337202a21d6SRyusuke Konishi goto out; 338202a21d6SRyusuke Konishi } 339237fead6SMichael Halcrow if (!nd) { 340237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave" 341237fead6SMichael Halcrow "as we *think* we are about to unlink\n"); 342237fead6SMichael Halcrow goto out; 343237fead6SMichael Halcrow } 344237fead6SMichael Halcrow /* Released in this function */ 345c3762229SRobert P. J. Day page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, 346f7267c0cSChristoph Lameter GFP_USER); 347237fead6SMichael Halcrow if (!page_virt) { 348237fead6SMichael Halcrow rc = -ENOMEM; 349237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 350237fead6SMichael Halcrow "Cannot ecryptfs_kmalloc a page\n"); 351391b52f9SMichael Halcrow goto out; 352237fead6SMichael Halcrow } 353237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 354e2bd99ecSMichael Halcrow if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) 355237fead6SMichael Halcrow ecryptfs_set_default_sizes(crypt_stat); 356391b52f9SMichael Halcrow if (!ecryptfs_inode_to_private(dentry->d_inode)->lower_file) { 357391b52f9SMichael Halcrow rc = ecryptfs_init_persistent_file(dentry); 358391b52f9SMichael Halcrow if (rc) { 359391b52f9SMichael Halcrow printk(KERN_ERR "%s: Error attempting to initialize " 360391b52f9SMichael Halcrow "the persistent file for the dentry with name " 361391b52f9SMichael Halcrow "[%s]; rc = [%d]\n", __func__, 362391b52f9SMichael Halcrow dentry->d_name.name, rc); 363391b52f9SMichael Halcrow goto out; 364391b52f9SMichael Halcrow } 365391b52f9SMichael Halcrow } 366d7cdc5feSMichael Halcrow rc = ecryptfs_read_and_validate_header_region(page_virt, 367d7cdc5feSMichael Halcrow dentry->d_inode); 368237fead6SMichael Halcrow if (rc) { 369dd2a3b7aSMichael Halcrow rc = ecryptfs_read_and_validate_xattr_region(page_virt, dentry); 370dd2a3b7aSMichael Halcrow if (rc) { 371dd2a3b7aSMichael Halcrow printk(KERN_DEBUG "Valid metadata not found in header " 372dd2a3b7aSMichael Halcrow "region or xattr region; treating file as " 373dd2a3b7aSMichael Halcrow "unencrypted\n"); 374237fead6SMichael Halcrow rc = 0; 375237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 376237fead6SMichael Halcrow goto out; 377237fead6SMichael Halcrow } 378dd2a3b7aSMichael Halcrow crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR; 379dd2a3b7aSMichael Halcrow } 380e77a56ddSMichael Halcrow mount_crypt_stat = &ecryptfs_superblock_to_private( 381e77a56ddSMichael Halcrow dentry->d_sb)->mount_crypt_stat; 382e77a56ddSMichael Halcrow if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) { 383e77a56ddSMichael Halcrow if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) 384cc11beffSMichael Halcrow file_size = (crypt_stat->num_header_bytes_at_front 385e77a56ddSMichael Halcrow + i_size_read(lower_dentry->d_inode)); 386e77a56ddSMichael Halcrow else 387e77a56ddSMichael Halcrow file_size = i_size_read(lower_dentry->d_inode); 388e77a56ddSMichael Halcrow } else { 3890a688ad7SHarvey Harrison file_size = get_unaligned_be64(page_virt); 390e77a56ddSMichael Halcrow } 391237fead6SMichael Halcrow i_size_write(dentry->d_inode, (loff_t)file_size); 392237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 393237fead6SMichael Halcrow goto out; 394237fead6SMichael Halcrow 395237fead6SMichael Halcrow out_dput: 396237fead6SMichael Halcrow dput(lower_dentry); 397237fead6SMichael Halcrow d_drop(dentry); 398237fead6SMichael Halcrow out: 399237fead6SMichael Halcrow return ERR_PTR(rc); 400237fead6SMichael Halcrow } 401237fead6SMichael Halcrow 402237fead6SMichael Halcrow static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, 403237fead6SMichael Halcrow struct dentry *new_dentry) 404237fead6SMichael Halcrow { 405237fead6SMichael Halcrow struct dentry *lower_old_dentry; 406237fead6SMichael Halcrow struct dentry *lower_new_dentry; 407237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 408237fead6SMichael Halcrow u64 file_size_save; 409237fead6SMichael Halcrow int rc; 410237fead6SMichael Halcrow 411237fead6SMichael Halcrow file_size_save = i_size_read(old_dentry->d_inode); 412237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 413237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 414237fead6SMichael Halcrow dget(lower_old_dentry); 415237fead6SMichael Halcrow dget(lower_new_dentry); 416237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_new_dentry); 417237fead6SMichael Halcrow rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, 418237fead6SMichael Halcrow lower_new_dentry); 419237fead6SMichael Halcrow if (rc || !lower_new_dentry->d_inode) 420237fead6SMichael Halcrow goto out_lock; 421237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0); 422237fead6SMichael Halcrow if (rc) 423237fead6SMichael Halcrow goto out_lock; 4240cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_new_dentry->d_inode); 4250cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_new_dentry->d_inode); 426237fead6SMichael Halcrow old_dentry->d_inode->i_nlink = 427237fead6SMichael Halcrow ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink; 428237fead6SMichael Halcrow i_size_write(new_dentry->d_inode, file_size_save); 429237fead6SMichael Halcrow out_lock: 430237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 431237fead6SMichael Halcrow dput(lower_new_dentry); 432237fead6SMichael Halcrow dput(lower_old_dentry); 433ae56fb16SMichael Halcrow d_drop(lower_old_dentry); 434237fead6SMichael Halcrow d_drop(new_dentry); 43545ec4abaSMichael Halcrow d_drop(old_dentry); 436237fead6SMichael Halcrow return rc; 437237fead6SMichael Halcrow } 438237fead6SMichael Halcrow 439237fead6SMichael Halcrow static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) 440237fead6SMichael Halcrow { 441237fead6SMichael Halcrow int rc = 0; 442237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 443237fead6SMichael Halcrow struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); 4448dc4e373SMiklos Szeredi struct dentry *lower_dir_dentry; 445237fead6SMichael Halcrow 4468dc4e373SMiklos Szeredi lower_dir_dentry = lock_parent(lower_dentry); 447237fead6SMichael Halcrow rc = vfs_unlink(lower_dir_inode, lower_dentry); 448237fead6SMichael Halcrow if (rc) { 449ae56fb16SMichael Halcrow printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc); 450237fead6SMichael Halcrow goto out_unlock; 451237fead6SMichael Halcrow } 4520cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_inode); 453237fead6SMichael Halcrow dentry->d_inode->i_nlink = 454237fead6SMichael Halcrow ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; 455237fead6SMichael Halcrow dentry->d_inode->i_ctime = dir->i_ctime; 456caeeeecfSMichael Halcrow d_drop(dentry); 457237fead6SMichael Halcrow out_unlock: 4588dc4e373SMiklos Szeredi unlock_dir(lower_dir_dentry); 459237fead6SMichael Halcrow return rc; 460237fead6SMichael Halcrow } 461237fead6SMichael Halcrow 462237fead6SMichael Halcrow static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, 463237fead6SMichael Halcrow const char *symname) 464237fead6SMichael Halcrow { 465237fead6SMichael Halcrow int rc; 466237fead6SMichael Halcrow struct dentry *lower_dentry; 467237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 468237fead6SMichael Halcrow umode_t mode; 469237fead6SMichael Halcrow char *encoded_symname; 470c381bfcfSMika Kukkonen int encoded_symlen; 471237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 472237fead6SMichael Halcrow 473237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 474237fead6SMichael Halcrow dget(lower_dentry); 475237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 476237fead6SMichael Halcrow mode = S_IALLUGO; 477237fead6SMichael Halcrow encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname, 478237fead6SMichael Halcrow strlen(symname), 479237fead6SMichael Halcrow &encoded_symname); 480237fead6SMichael Halcrow if (encoded_symlen < 0) { 481237fead6SMichael Halcrow rc = encoded_symlen; 482237fead6SMichael Halcrow goto out_lock; 483237fead6SMichael Halcrow } 484237fead6SMichael Halcrow rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, 485237fead6SMichael Halcrow encoded_symname, mode); 486237fead6SMichael Halcrow kfree(encoded_symname); 487237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 488237fead6SMichael Halcrow goto out_lock; 489237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 490237fead6SMichael Halcrow if (rc) 491237fead6SMichael Halcrow goto out_lock; 4920cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 4930cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 494237fead6SMichael Halcrow out_lock: 495237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 496237fead6SMichael Halcrow dput(lower_dentry); 497237fead6SMichael Halcrow if (!dentry->d_inode) 498237fead6SMichael Halcrow d_drop(dentry); 499237fead6SMichael Halcrow return rc; 500237fead6SMichael Halcrow } 501237fead6SMichael Halcrow 502237fead6SMichael Halcrow static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 503237fead6SMichael Halcrow { 504237fead6SMichael Halcrow int rc; 505237fead6SMichael Halcrow struct dentry *lower_dentry; 506237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 507237fead6SMichael Halcrow 508237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 509237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 510237fead6SMichael Halcrow rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); 511237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 512237fead6SMichael Halcrow goto out; 513237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 514237fead6SMichael Halcrow if (rc) 515237fead6SMichael Halcrow goto out; 5160cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 5170cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 518237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 519237fead6SMichael Halcrow out: 520237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 521237fead6SMichael Halcrow if (!dentry->d_inode) 522237fead6SMichael Halcrow d_drop(dentry); 523237fead6SMichael Halcrow return rc; 524237fead6SMichael Halcrow } 525237fead6SMichael Halcrow 526237fead6SMichael Halcrow static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) 527237fead6SMichael Halcrow { 528237fead6SMichael Halcrow struct dentry *lower_dentry; 529237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 53045ec4abaSMichael Halcrow int rc; 531237fead6SMichael Halcrow 532237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 53345ec4abaSMichael Halcrow dget(dentry); 534237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 53545ec4abaSMichael Halcrow dget(lower_dentry); 536237fead6SMichael Halcrow rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); 53745ec4abaSMichael Halcrow dput(lower_dentry); 53845ec4abaSMichael Halcrow if (!rc) 53945ec4abaSMichael Halcrow d_delete(lower_dentry); 5400cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 541237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 542237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 543237fead6SMichael Halcrow if (!rc) 544237fead6SMichael Halcrow d_drop(dentry); 54545ec4abaSMichael Halcrow dput(dentry); 546237fead6SMichael Halcrow return rc; 547237fead6SMichael Halcrow } 548237fead6SMichael Halcrow 549237fead6SMichael Halcrow static int 550237fead6SMichael Halcrow ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) 551237fead6SMichael Halcrow { 552237fead6SMichael Halcrow int rc; 553237fead6SMichael Halcrow struct dentry *lower_dentry; 554237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 555237fead6SMichael Halcrow 556237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 557237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 558237fead6SMichael Halcrow rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); 559237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 560237fead6SMichael Halcrow goto out; 561391b52f9SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 562237fead6SMichael Halcrow if (rc) 563237fead6SMichael Halcrow goto out; 5640cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 5650cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 566237fead6SMichael Halcrow out: 567237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 568237fead6SMichael Halcrow if (!dentry->d_inode) 569237fead6SMichael Halcrow d_drop(dentry); 570237fead6SMichael Halcrow return rc; 571237fead6SMichael Halcrow } 572237fead6SMichael Halcrow 573237fead6SMichael Halcrow static int 574237fead6SMichael Halcrow ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, 575237fead6SMichael Halcrow struct inode *new_dir, struct dentry *new_dentry) 576237fead6SMichael Halcrow { 577237fead6SMichael Halcrow int rc; 578237fead6SMichael Halcrow struct dentry *lower_old_dentry; 579237fead6SMichael Halcrow struct dentry *lower_new_dentry; 580237fead6SMichael Halcrow struct dentry *lower_old_dir_dentry; 581237fead6SMichael Halcrow struct dentry *lower_new_dir_dentry; 582237fead6SMichael Halcrow 583237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 584237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 585237fead6SMichael Halcrow dget(lower_old_dentry); 586237fead6SMichael Halcrow dget(lower_new_dentry); 587237fead6SMichael Halcrow lower_old_dir_dentry = dget_parent(lower_old_dentry); 588237fead6SMichael Halcrow lower_new_dir_dentry = dget_parent(lower_new_dentry); 589237fead6SMichael Halcrow lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 590237fead6SMichael Halcrow rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, 591237fead6SMichael Halcrow lower_new_dir_dentry->d_inode, lower_new_dentry); 592237fead6SMichael Halcrow if (rc) 593237fead6SMichael Halcrow goto out_lock; 5940cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL); 595237fead6SMichael Halcrow if (new_dir != old_dir) 5960cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL); 597237fead6SMichael Halcrow out_lock: 598237fead6SMichael Halcrow unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 599a9083081SMichael Halcrow dput(lower_new_dentry->d_parent); 600a9083081SMichael Halcrow dput(lower_old_dentry->d_parent); 601237fead6SMichael Halcrow dput(lower_new_dentry); 602237fead6SMichael Halcrow dput(lower_old_dentry); 603237fead6SMichael Halcrow return rc; 604237fead6SMichael Halcrow } 605237fead6SMichael Halcrow 606237fead6SMichael Halcrow static int 607237fead6SMichael Halcrow ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz) 608237fead6SMichael Halcrow { 609237fead6SMichael Halcrow int rc; 610237fead6SMichael Halcrow struct dentry *lower_dentry; 611237fead6SMichael Halcrow char *decoded_name; 612237fead6SMichael Halcrow char *lower_buf; 613237fead6SMichael Halcrow mm_segment_t old_fs; 614237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 615237fead6SMichael Halcrow 616237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 617237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op || 618237fead6SMichael Halcrow !lower_dentry->d_inode->i_op->readlink) { 619237fead6SMichael Halcrow rc = -EINVAL; 620237fead6SMichael Halcrow goto out; 621237fead6SMichael Halcrow } 622237fead6SMichael Halcrow /* Released in this function */ 623237fead6SMichael Halcrow lower_buf = kmalloc(bufsiz, GFP_KERNEL); 624237fead6SMichael Halcrow if (lower_buf == NULL) { 625237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory\n"); 626237fead6SMichael Halcrow rc = -ENOMEM; 627237fead6SMichael Halcrow goto out; 628237fead6SMichael Halcrow } 629237fead6SMichael Halcrow old_fs = get_fs(); 630237fead6SMichael Halcrow set_fs(get_ds()); 631237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 632237fead6SMichael Halcrow "lower_dentry->d_name.name = [%s]\n", 633237fead6SMichael Halcrow lower_dentry->d_name.name); 634237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, 635237fead6SMichael Halcrow (char __user *)lower_buf, 636237fead6SMichael Halcrow bufsiz); 637237fead6SMichael Halcrow set_fs(old_fs); 638237fead6SMichael Halcrow if (rc >= 0) { 639237fead6SMichael Halcrow crypt_stat = NULL; 640237fead6SMichael Halcrow rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc, 641237fead6SMichael Halcrow &decoded_name); 642237fead6SMichael Halcrow if (rc == -ENOMEM) 643237fead6SMichael Halcrow goto out_free_lower_buf; 644237fead6SMichael Halcrow if (rc > 0) { 645237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes " 646237fead6SMichael Halcrow "to userspace: [%*s]\n", rc, 647237fead6SMichael Halcrow decoded_name); 648237fead6SMichael Halcrow if (copy_to_user(buf, decoded_name, rc)) 649237fead6SMichael Halcrow rc = -EFAULT; 650237fead6SMichael Halcrow } 651237fead6SMichael Halcrow kfree(decoded_name); 6520cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_atime(dentry->d_inode, 653237fead6SMichael Halcrow lower_dentry->d_inode); 654237fead6SMichael Halcrow } 655237fead6SMichael Halcrow out_free_lower_buf: 656237fead6SMichael Halcrow kfree(lower_buf); 657237fead6SMichael Halcrow out: 658237fead6SMichael Halcrow return rc; 659237fead6SMichael Halcrow } 660237fead6SMichael Halcrow 661237fead6SMichael Halcrow static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) 662237fead6SMichael Halcrow { 663237fead6SMichael Halcrow char *buf; 664237fead6SMichael Halcrow int len = PAGE_SIZE, rc; 665237fead6SMichael Halcrow mm_segment_t old_fs; 666237fead6SMichael Halcrow 667237fead6SMichael Halcrow /* Released in ecryptfs_put_link(); only release here on error */ 668237fead6SMichael Halcrow buf = kmalloc(len, GFP_KERNEL); 669237fead6SMichael Halcrow if (!buf) { 670237fead6SMichael Halcrow rc = -ENOMEM; 671237fead6SMichael Halcrow goto out; 672237fead6SMichael Halcrow } 673237fead6SMichael Halcrow old_fs = get_fs(); 674237fead6SMichael Halcrow set_fs(get_ds()); 675237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 676237fead6SMichael Halcrow "dentry->d_name.name = [%s]\n", dentry->d_name.name); 677237fead6SMichael Halcrow rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len); 678237fead6SMichael Halcrow buf[rc] = '\0'; 679237fead6SMichael Halcrow set_fs(old_fs); 680237fead6SMichael Halcrow if (rc < 0) 681237fead6SMichael Halcrow goto out_free; 682237fead6SMichael Halcrow rc = 0; 683237fead6SMichael Halcrow nd_set_link(nd, buf); 684237fead6SMichael Halcrow goto out; 685237fead6SMichael Halcrow out_free: 686237fead6SMichael Halcrow kfree(buf); 687237fead6SMichael Halcrow out: 688237fead6SMichael Halcrow return ERR_PTR(rc); 689237fead6SMichael Halcrow } 690237fead6SMichael Halcrow 691237fead6SMichael Halcrow static void 692237fead6SMichael Halcrow ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) 693237fead6SMichael Halcrow { 694237fead6SMichael Halcrow /* Free the char* */ 695237fead6SMichael Halcrow kfree(nd_get_link(nd)); 696237fead6SMichael Halcrow } 697237fead6SMichael Halcrow 698237fead6SMichael Halcrow /** 699237fead6SMichael Halcrow * upper_size_to_lower_size 700237fead6SMichael Halcrow * @crypt_stat: Crypt_stat associated with file 701237fead6SMichael Halcrow * @upper_size: Size of the upper file 702237fead6SMichael Halcrow * 703cc11beffSMichael Halcrow * Calculate the required size of the lower file based on the 704237fead6SMichael Halcrow * specified size of the upper file. This calculation is based on the 705237fead6SMichael Halcrow * number of headers in the underlying file and the extent size. 706237fead6SMichael Halcrow * 707237fead6SMichael Halcrow * Returns Calculated size of the lower file. 708237fead6SMichael Halcrow */ 709237fead6SMichael Halcrow static loff_t 710237fead6SMichael Halcrow upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, 711237fead6SMichael Halcrow loff_t upper_size) 712237fead6SMichael Halcrow { 713237fead6SMichael Halcrow loff_t lower_size; 714237fead6SMichael Halcrow 715cc11beffSMichael Halcrow lower_size = crypt_stat->num_header_bytes_at_front; 716237fead6SMichael Halcrow if (upper_size != 0) { 717237fead6SMichael Halcrow loff_t num_extents; 718237fead6SMichael Halcrow 719237fead6SMichael Halcrow num_extents = upper_size >> crypt_stat->extent_shift; 720237fead6SMichael Halcrow if (upper_size & ~crypt_stat->extent_mask) 721237fead6SMichael Halcrow num_extents++; 722237fead6SMichael Halcrow lower_size += (num_extents * crypt_stat->extent_size); 723237fead6SMichael Halcrow } 724237fead6SMichael Halcrow return lower_size; 725237fead6SMichael Halcrow } 726237fead6SMichael Halcrow 727237fead6SMichael Halcrow /** 728237fead6SMichael Halcrow * ecryptfs_truncate 729237fead6SMichael Halcrow * @dentry: The ecryptfs layer dentry 730237fead6SMichael Halcrow * @new_length: The length to expand the file to 731237fead6SMichael Halcrow * 732237fead6SMichael Halcrow * Function to handle truncations modifying the size of the file. Note 733237fead6SMichael Halcrow * that the file sizes are interpolated. When expanding, we are simply 734237fead6SMichael Halcrow * writing strings of 0's out. When truncating, we need to modify the 735237fead6SMichael Halcrow * underlying file size according to the page index interpolations. 736237fead6SMichael Halcrow * 737237fead6SMichael Halcrow * Returns zero on success; non-zero otherwise 738237fead6SMichael Halcrow */ 739237fead6SMichael Halcrow int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) 740237fead6SMichael Halcrow { 741237fead6SMichael Halcrow int rc = 0; 742237fead6SMichael Halcrow struct inode *inode = dentry->d_inode; 743237fead6SMichael Halcrow struct dentry *lower_dentry; 7442ed92554SMichael Halcrow struct file fake_ecryptfs_file; 745237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 746237fead6SMichael Halcrow loff_t i_size = i_size_read(inode); 747237fead6SMichael Halcrow loff_t lower_size_before_truncate; 748237fead6SMichael Halcrow loff_t lower_size_after_truncate; 749237fead6SMichael Halcrow 750237fead6SMichael Halcrow if (unlikely((new_length == i_size))) 751237fead6SMichael Halcrow goto out; 752237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 753237fead6SMichael Halcrow /* Set up a fake ecryptfs file, this is used to interface with 754237fead6SMichael Halcrow * the file in the underlying filesystem so that the 755237fead6SMichael Halcrow * truncation has an effect there as well. */ 756237fead6SMichael Halcrow memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file)); 757bd243a4bSJosef "Jeff" Sipek fake_ecryptfs_file.f_path.dentry = dentry; 758237fead6SMichael Halcrow /* Released at out_free: label */ 759237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_ecryptfs_file, 760237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_file_info_cache, 761e94b1766SChristoph Lameter GFP_KERNEL)); 762237fead6SMichael Halcrow if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) { 763237fead6SMichael Halcrow rc = -ENOMEM; 764237fead6SMichael Halcrow goto out; 765237fead6SMichael Halcrow } 766237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 7672ed92554SMichael Halcrow ecryptfs_set_file_lower( 7682ed92554SMichael Halcrow &fake_ecryptfs_file, 7692ed92554SMichael Halcrow ecryptfs_inode_to_private(dentry->d_inode)->lower_file); 770237fead6SMichael Halcrow /* Switch on growing or shrinking file */ 771237fead6SMichael Halcrow if (new_length > i_size) { 7722ed92554SMichael Halcrow char zero[] = { 0x00 }; 773240e2df5SMichael Halcrow 7742ed92554SMichael Halcrow /* Write a single 0 at the last position of the file; 7752ed92554SMichael Halcrow * this triggers code that will fill in 0's throughout 7762ed92554SMichael Halcrow * the intermediate portion of the previous end of the 7772ed92554SMichael Halcrow * file and the new and of the file */ 7782ed92554SMichael Halcrow rc = ecryptfs_write(&fake_ecryptfs_file, zero, 7792ed92554SMichael Halcrow (new_length - 1), 1); 7802ed92554SMichael Halcrow } else { /* new_length < i_size_read(inode) */ 7812ed92554SMichael Halcrow /* We're chopping off all the pages down do the page 7822ed92554SMichael Halcrow * in which new_length is located. Fill in the end of 7832ed92554SMichael Halcrow * that page from (new_length & ~PAGE_CACHE_MASK) to 7842ed92554SMichael Halcrow * PAGE_CACHE_SIZE with zeros. */ 7852ed92554SMichael Halcrow size_t num_zeros = (PAGE_CACHE_SIZE 7862ed92554SMichael Halcrow - (new_length & ~PAGE_CACHE_MASK)); 7872ed92554SMichael Halcrow 7882ed92554SMichael Halcrow if (num_zeros) { 7892ed92554SMichael Halcrow char *zeros_virt; 7902ed92554SMichael Halcrow 7912ed92554SMichael Halcrow zeros_virt = kzalloc(num_zeros, GFP_KERNEL); 7922ed92554SMichael Halcrow if (!zeros_virt) { 7932ed92554SMichael Halcrow rc = -ENOMEM; 7942ed92554SMichael Halcrow goto out_free; 795240e2df5SMichael Halcrow } 7962ed92554SMichael Halcrow rc = ecryptfs_write(&fake_ecryptfs_file, zeros_virt, 7972ed92554SMichael Halcrow new_length, num_zeros); 7982ed92554SMichael Halcrow kfree(zeros_virt); 7995dda6992SMichael Halcrow if (rc) { 800240e2df5SMichael Halcrow printk(KERN_ERR "Error attempting to zero out " 801240e2df5SMichael Halcrow "the remainder of the end page on " 802240e2df5SMichael Halcrow "reducing truncate; rc = [%d]\n", rc); 8032ed92554SMichael Halcrow goto out_free; 804240e2df5SMichael Halcrow } 805240e2df5SMichael Halcrow } 806237fead6SMichael Halcrow vmtruncate(inode, new_length); 8070216f7f7SMichael Halcrow rc = ecryptfs_write_inode_size_to_metadata(inode); 808dd2a3b7aSMichael Halcrow if (rc) { 809dd2a3b7aSMichael Halcrow printk(KERN_ERR "Problem with " 810dd2a3b7aSMichael Halcrow "ecryptfs_write_inode_size_to_metadata; " 811dd2a3b7aSMichael Halcrow "rc = [%d]\n", rc); 8122ed92554SMichael Halcrow goto out_free; 813dd2a3b7aSMichael Halcrow } 814237fead6SMichael Halcrow /* We are reducing the size of the ecryptfs file, and need to 815237fead6SMichael Halcrow * know if we need to reduce the size of the lower file. */ 816237fead6SMichael Halcrow lower_size_before_truncate = 817237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, i_size); 818237fead6SMichael Halcrow lower_size_after_truncate = 819237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, new_length); 820237fead6SMichael Halcrow if (lower_size_after_truncate < lower_size_before_truncate) 821237fead6SMichael Halcrow vmtruncate(lower_dentry->d_inode, 822237fead6SMichael Halcrow lower_size_after_truncate); 823237fead6SMichael Halcrow } 824237fead6SMichael Halcrow out_free: 825237fead6SMichael Halcrow if (ecryptfs_file_to_private(&fake_ecryptfs_file)) 826237fead6SMichael Halcrow kmem_cache_free(ecryptfs_file_info_cache, 827237fead6SMichael Halcrow ecryptfs_file_to_private(&fake_ecryptfs_file)); 828237fead6SMichael Halcrow out: 829237fead6SMichael Halcrow return rc; 830237fead6SMichael Halcrow } 831237fead6SMichael Halcrow 832237fead6SMichael Halcrow static int 833237fead6SMichael Halcrow ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd) 834237fead6SMichael Halcrow { 835237fead6SMichael Halcrow int rc; 836237fead6SMichael Halcrow 837237fead6SMichael Halcrow if (nd) { 8384ac91378SJan Blunck struct vfsmount *vfsmnt_save = nd->path.mnt; 8394ac91378SJan Blunck struct dentry *dentry_save = nd->path.dentry; 840237fead6SMichael Halcrow 8414ac91378SJan Blunck nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry); 8424ac91378SJan Blunck nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry); 843237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, nd); 8444ac91378SJan Blunck nd->path.mnt = vfsmnt_save; 8454ac91378SJan Blunck nd->path.dentry = dentry_save; 846237fead6SMichael Halcrow } else 847237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL); 848237fead6SMichael Halcrow return rc; 849237fead6SMichael Halcrow } 850237fead6SMichael Halcrow 851237fead6SMichael Halcrow /** 852237fead6SMichael Halcrow * ecryptfs_setattr 853237fead6SMichael Halcrow * @dentry: dentry handle to the inode to modify 854237fead6SMichael Halcrow * @ia: Structure with flags of what to change and values 855237fead6SMichael Halcrow * 856237fead6SMichael Halcrow * Updates the metadata of an inode. If the update is to the size 857237fead6SMichael Halcrow * i.e. truncation, then ecryptfs_truncate will handle the size modification 858237fead6SMichael Halcrow * of both the ecryptfs inode and the lower inode. 859237fead6SMichael Halcrow * 860237fead6SMichael Halcrow * All other metadata changes will be passed right to the lower filesystem, 861237fead6SMichael Halcrow * and we will just update our inode to look like the lower. 862237fead6SMichael Halcrow */ 863237fead6SMichael Halcrow static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) 864237fead6SMichael Halcrow { 865237fead6SMichael Halcrow int rc = 0; 866237fead6SMichael Halcrow struct dentry *lower_dentry; 867237fead6SMichael Halcrow struct inode *inode; 868237fead6SMichael Halcrow struct inode *lower_inode; 869237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 870237fead6SMichael Halcrow 871237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 872e10f281bSMichael Halcrow if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) 873e10f281bSMichael Halcrow ecryptfs_init_crypt_stat(crypt_stat); 874237fead6SMichael Halcrow inode = dentry->d_inode; 875237fead6SMichael Halcrow lower_inode = ecryptfs_inode_to_lower(inode); 876e10f281bSMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 877e10f281bSMichael Halcrow mutex_lock(&crypt_stat->cs_mutex); 878e10f281bSMichael Halcrow if (S_ISDIR(dentry->d_inode->i_mode)) 879e10f281bSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 88064ee4808SMichael Halcrow else if (S_ISREG(dentry->d_inode->i_mode) 88164ee4808SMichael Halcrow && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED) 88264ee4808SMichael Halcrow || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) { 883e10f281bSMichael Halcrow struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 884e10f281bSMichael Halcrow 885e10f281bSMichael Halcrow mount_crypt_stat = &ecryptfs_superblock_to_private( 886e10f281bSMichael Halcrow dentry->d_sb)->mount_crypt_stat; 887d7cdc5feSMichael Halcrow rc = ecryptfs_read_metadata(dentry); 8885dda6992SMichael Halcrow if (rc) { 889e10f281bSMichael Halcrow if (!(mount_crypt_stat->flags 890e10f281bSMichael Halcrow & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) { 891e10f281bSMichael Halcrow rc = -EIO; 89225bd8174SMichael Halcrow printk(KERN_WARNING "Either the lower file " 893e10f281bSMichael Halcrow "is not in a valid eCryptfs format, " 89425bd8174SMichael Halcrow "or the key could not be retrieved. " 89525bd8174SMichael Halcrow "Plaintext passthrough mode is not " 896e10f281bSMichael Halcrow "enabled; returning -EIO\n"); 897e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 898e10f281bSMichael Halcrow goto out; 899e10f281bSMichael Halcrow } 900e10f281bSMichael Halcrow rc = 0; 901e10f281bSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 902e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 903e10f281bSMichael Halcrow goto out; 904e10f281bSMichael Halcrow } 905e10f281bSMichael Halcrow } 906e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 907237fead6SMichael Halcrow if (ia->ia_valid & ATTR_SIZE) { 908237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, 909237fead6SMichael Halcrow "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n", 910237fead6SMichael Halcrow ia->ia_valid, ATTR_SIZE); 911237fead6SMichael Halcrow rc = ecryptfs_truncate(dentry, ia->ia_size); 912237fead6SMichael Halcrow /* ecryptfs_truncate handles resizing of the lower file */ 913237fead6SMichael Halcrow ia->ia_valid &= ~ATTR_SIZE; 914237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n", 915237fead6SMichael Halcrow ia->ia_valid); 916237fead6SMichael Halcrow if (rc < 0) 917237fead6SMichael Halcrow goto out; 918237fead6SMichael Halcrow } 9191ac564ecSJeff Layton 9201ac564ecSJeff Layton /* 9211ac564ecSJeff Layton * mode change is for clearing setuid/setgid bits. Allow lower fs 9221ac564ecSJeff Layton * to interpret this in its own way. 9231ac564ecSJeff Layton */ 9241ac564ecSJeff Layton if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) 9251ac564ecSJeff Layton ia->ia_valid &= ~ATTR_MODE; 9261ac564ecSJeff Layton 9279c3580aaSMiklos Szeredi mutex_lock(&lower_dentry->d_inode->i_mutex); 928237fead6SMichael Halcrow rc = notify_change(lower_dentry, ia); 9299c3580aaSMiklos Szeredi mutex_unlock(&lower_dentry->d_inode->i_mutex); 930237fead6SMichael Halcrow out: 9310cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(inode, lower_inode, NULL); 932237fead6SMichael Halcrow return rc; 933237fead6SMichael Halcrow } 934237fead6SMichael Halcrow 935dd2a3b7aSMichael Halcrow int 936237fead6SMichael Halcrow ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, 937237fead6SMichael Halcrow size_t size, int flags) 938237fead6SMichael Halcrow { 939237fead6SMichael Halcrow int rc = 0; 940237fead6SMichael Halcrow struct dentry *lower_dentry; 941237fead6SMichael Halcrow 942237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 943237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->setxattr) { 944237fead6SMichael Halcrow rc = -ENOSYS; 945237fead6SMichael Halcrow goto out; 946237fead6SMichael Halcrow } 947237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 948237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, 949237fead6SMichael Halcrow size, flags); 950237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 951237fead6SMichael Halcrow out: 952237fead6SMichael Halcrow return rc; 953237fead6SMichael Halcrow } 954237fead6SMichael Halcrow 955dd2a3b7aSMichael Halcrow ssize_t 956d7cdc5feSMichael Halcrow ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, 957d7cdc5feSMichael Halcrow void *value, size_t size) 958d7cdc5feSMichael Halcrow { 959d7cdc5feSMichael Halcrow int rc = 0; 960d7cdc5feSMichael Halcrow 961d7cdc5feSMichael Halcrow if (!lower_dentry->d_inode->i_op->getxattr) { 962d7cdc5feSMichael Halcrow rc = -ENOSYS; 963d7cdc5feSMichael Halcrow goto out; 964d7cdc5feSMichael Halcrow } 965d7cdc5feSMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 966d7cdc5feSMichael Halcrow rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, 967d7cdc5feSMichael Halcrow size); 968d7cdc5feSMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 969d7cdc5feSMichael Halcrow out: 970d7cdc5feSMichael Halcrow return rc; 971d7cdc5feSMichael Halcrow } 972d7cdc5feSMichael Halcrow 9737896b631SAdrian Bunk static ssize_t 974237fead6SMichael Halcrow ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, 975237fead6SMichael Halcrow size_t size) 976237fead6SMichael Halcrow { 9772ed92554SMichael Halcrow return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name, 9782ed92554SMichael Halcrow value, size); 979237fead6SMichael Halcrow } 980237fead6SMichael Halcrow 981237fead6SMichael Halcrow static ssize_t 982237fead6SMichael Halcrow ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) 983237fead6SMichael Halcrow { 984237fead6SMichael Halcrow int rc = 0; 985237fead6SMichael Halcrow struct dentry *lower_dentry; 986237fead6SMichael Halcrow 987237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 988237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->listxattr) { 989237fead6SMichael Halcrow rc = -ENOSYS; 990237fead6SMichael Halcrow goto out; 991237fead6SMichael Halcrow } 992237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 993237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size); 994237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 995237fead6SMichael Halcrow out: 996237fead6SMichael Halcrow return rc; 997237fead6SMichael Halcrow } 998237fead6SMichael Halcrow 999237fead6SMichael Halcrow static int ecryptfs_removexattr(struct dentry *dentry, const char *name) 1000237fead6SMichael Halcrow { 1001237fead6SMichael Halcrow int rc = 0; 1002237fead6SMichael Halcrow struct dentry *lower_dentry; 1003237fead6SMichael Halcrow 1004237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 1005237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->removexattr) { 1006237fead6SMichael Halcrow rc = -ENOSYS; 1007237fead6SMichael Halcrow goto out; 1008237fead6SMichael Halcrow } 1009237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 1010237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); 1011237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 1012237fead6SMichael Halcrow out: 1013237fead6SMichael Halcrow return rc; 1014237fead6SMichael Halcrow } 1015237fead6SMichael Halcrow 1016237fead6SMichael Halcrow int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode) 1017237fead6SMichael Halcrow { 1018237fead6SMichael Halcrow if ((ecryptfs_inode_to_lower(inode) 1019237fead6SMichael Halcrow == (struct inode *)candidate_lower_inode)) 1020237fead6SMichael Halcrow return 1; 1021237fead6SMichael Halcrow else 1022237fead6SMichael Halcrow return 0; 1023237fead6SMichael Halcrow } 1024237fead6SMichael Halcrow 1025237fead6SMichael Halcrow int ecryptfs_inode_set(struct inode *inode, void *lower_inode) 1026237fead6SMichael Halcrow { 1027237fead6SMichael Halcrow ecryptfs_init_inode(inode, (struct inode *)lower_inode); 1028237fead6SMichael Halcrow return 0; 1029237fead6SMichael Halcrow } 1030237fead6SMichael Halcrow 1031754661f1SArjan van de Ven const struct inode_operations ecryptfs_symlink_iops = { 1032237fead6SMichael Halcrow .readlink = ecryptfs_readlink, 1033237fead6SMichael Halcrow .follow_link = ecryptfs_follow_link, 1034237fead6SMichael Halcrow .put_link = ecryptfs_put_link, 1035237fead6SMichael Halcrow .permission = ecryptfs_permission, 1036237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1037237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1038237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1039237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1040237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1041237fead6SMichael Halcrow }; 1042237fead6SMichael Halcrow 1043754661f1SArjan van de Ven const struct inode_operations ecryptfs_dir_iops = { 1044237fead6SMichael Halcrow .create = ecryptfs_create, 1045237fead6SMichael Halcrow .lookup = ecryptfs_lookup, 1046237fead6SMichael Halcrow .link = ecryptfs_link, 1047237fead6SMichael Halcrow .unlink = ecryptfs_unlink, 1048237fead6SMichael Halcrow .symlink = ecryptfs_symlink, 1049237fead6SMichael Halcrow .mkdir = ecryptfs_mkdir, 1050237fead6SMichael Halcrow .rmdir = ecryptfs_rmdir, 1051237fead6SMichael Halcrow .mknod = ecryptfs_mknod, 1052237fead6SMichael Halcrow .rename = ecryptfs_rename, 1053237fead6SMichael Halcrow .permission = ecryptfs_permission, 1054237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1055237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1056237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1057237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1058237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1059237fead6SMichael Halcrow }; 1060237fead6SMichael Halcrow 1061754661f1SArjan van de Ven const struct inode_operations ecryptfs_main_iops = { 1062237fead6SMichael Halcrow .permission = ecryptfs_permission, 1063237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1064237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1065237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1066237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1067237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1068237fead6SMichael Halcrow }; 1069