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> 34237fead6SMichael Halcrow #include "ecryptfs_kernel.h" 35237fead6SMichael Halcrow 36237fead6SMichael Halcrow static struct dentry *lock_parent(struct dentry *dentry) 37237fead6SMichael Halcrow { 38237fead6SMichael Halcrow struct dentry *dir; 39237fead6SMichael Halcrow 40237fead6SMichael Halcrow dir = dget(dentry->d_parent); 41908e0a8aSPeter Zijlstra mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT); 42237fead6SMichael Halcrow return dir; 43237fead6SMichael Halcrow } 44237fead6SMichael Halcrow 45237fead6SMichael Halcrow static void unlock_parent(struct dentry *dentry) 46237fead6SMichael Halcrow { 47237fead6SMichael Halcrow mutex_unlock(&(dentry->d_parent->d_inode->i_mutex)); 48237fead6SMichael Halcrow dput(dentry->d_parent); 49237fead6SMichael Halcrow } 50237fead6SMichael Halcrow 51237fead6SMichael Halcrow static void unlock_dir(struct dentry *dir) 52237fead6SMichael Halcrow { 53237fead6SMichael Halcrow mutex_unlock(&dir->d_inode->i_mutex); 54237fead6SMichael Halcrow dput(dir); 55237fead6SMichael Halcrow } 56237fead6SMichael Halcrow 57237fead6SMichael Halcrow /** 58237fead6SMichael Halcrow * ecryptfs_create_underlying_file 59237fead6SMichael Halcrow * @lower_dir_inode: inode of the parent in the lower fs of the new file 60237fead6SMichael Halcrow * @lower_dentry: New file's dentry in the lower fs 61237fead6SMichael Halcrow * @ecryptfs_dentry: New file's dentry in ecryptfs 62237fead6SMichael Halcrow * @mode: The mode of the new file 63237fead6SMichael Halcrow * @nd: nameidata of ecryptfs' parent's dentry & vfsmount 64237fead6SMichael Halcrow * 65237fead6SMichael Halcrow * Creates the file in the lower file system. 66237fead6SMichael Halcrow * 67237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 68237fead6SMichael Halcrow */ 69237fead6SMichael Halcrow static int 70237fead6SMichael Halcrow ecryptfs_create_underlying_file(struct inode *lower_dir_inode, 71237fead6SMichael Halcrow struct dentry *dentry, int mode, 72237fead6SMichael Halcrow struct nameidata *nd) 73237fead6SMichael Halcrow { 74237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 75237fead6SMichael Halcrow struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); 76237fead6SMichael Halcrow struct dentry *dentry_save; 77237fead6SMichael Halcrow struct vfsmount *vfsmount_save; 78237fead6SMichael Halcrow int rc; 79237fead6SMichael Halcrow 80237fead6SMichael Halcrow dentry_save = nd->dentry; 81237fead6SMichael Halcrow vfsmount_save = nd->mnt; 82237fead6SMichael Halcrow nd->dentry = lower_dentry; 83237fead6SMichael Halcrow nd->mnt = lower_mnt; 84237fead6SMichael Halcrow rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); 85237fead6SMichael Halcrow nd->dentry = dentry_save; 86237fead6SMichael Halcrow nd->mnt = vfsmount_save; 87237fead6SMichael Halcrow return rc; 88237fead6SMichael Halcrow } 89237fead6SMichael Halcrow 90237fead6SMichael Halcrow /** 91237fead6SMichael Halcrow * ecryptfs_do_create 92237fead6SMichael Halcrow * @directory_inode: inode of the new file's dentry's parent in ecryptfs 93237fead6SMichael Halcrow * @ecryptfs_dentry: New file's dentry in ecryptfs 94237fead6SMichael Halcrow * @mode: The mode of the new file 95237fead6SMichael Halcrow * @nd: nameidata of ecryptfs' parent's dentry & vfsmount 96237fead6SMichael Halcrow * 97237fead6SMichael Halcrow * Creates the underlying file and the eCryptfs inode which will link to 98237fead6SMichael Halcrow * it. It will also update the eCryptfs directory inode to mimic the 99237fead6SMichael Halcrow * stat of the lower directory inode. 100237fead6SMichael Halcrow * 101237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 102237fead6SMichael Halcrow */ 103237fead6SMichael Halcrow static int 104237fead6SMichael Halcrow ecryptfs_do_create(struct inode *directory_inode, 105237fead6SMichael Halcrow struct dentry *ecryptfs_dentry, int mode, 106237fead6SMichael Halcrow struct nameidata *nd) 107237fead6SMichael Halcrow { 108237fead6SMichael Halcrow int rc; 109237fead6SMichael Halcrow struct dentry *lower_dentry; 110237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 111237fead6SMichael Halcrow 112237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); 113237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 114237fead6SMichael Halcrow if (unlikely(IS_ERR(lower_dir_dentry))) { 115237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error locking directory of " 116237fead6SMichael Halcrow "dentry\n"); 117237fead6SMichael Halcrow rc = PTR_ERR(lower_dir_dentry); 118237fead6SMichael Halcrow goto out; 119237fead6SMichael Halcrow } 120237fead6SMichael Halcrow rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode, 121237fead6SMichael Halcrow ecryptfs_dentry, mode, nd); 1224981e081SMichael Halcrow if (rc) { 1234981e081SMichael Halcrow struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode; 1244981e081SMichael Halcrow struct ecryptfs_inode_info *inode_info = 1254981e081SMichael Halcrow ecryptfs_inode_to_private(ecryptfs_inode); 1264981e081SMichael Halcrow 1274981e081SMichael Halcrow printk(KERN_WARNING "%s: Error creating underlying file; " 1284981e081SMichael Halcrow "rc = [%d]; checking for existing\n", __FUNCTION__, rc); 1294981e081SMichael Halcrow if (inode_info) { 1304981e081SMichael Halcrow mutex_lock(&inode_info->lower_file_mutex); 1314981e081SMichael Halcrow if (!inode_info->lower_file) { 1324981e081SMichael Halcrow mutex_unlock(&inode_info->lower_file_mutex); 1334981e081SMichael Halcrow printk(KERN_ERR "%s: Failure to set underlying " 1344981e081SMichael Halcrow "file; rc = [%d]\n", __FUNCTION__, rc); 135237fead6SMichael Halcrow goto out_lock; 136237fead6SMichael Halcrow } 1374981e081SMichael Halcrow mutex_unlock(&inode_info->lower_file_mutex); 1384981e081SMichael Halcrow } 1394981e081SMichael Halcrow } 140237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, 141237fead6SMichael Halcrow directory_inode->i_sb, 0); 142237fead6SMichael Halcrow if (rc) { 143237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n"); 144237fead6SMichael Halcrow goto out_lock; 145237fead6SMichael Halcrow } 1460cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode); 1470cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode); 148237fead6SMichael Halcrow out_lock: 149237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 150237fead6SMichael Halcrow out: 151237fead6SMichael Halcrow return rc; 152237fead6SMichael Halcrow } 153237fead6SMichael Halcrow 154237fead6SMichael Halcrow /** 155237fead6SMichael Halcrow * grow_file 156d7cdc5feSMichael Halcrow * @ecryptfs_dentry: the eCryptfs dentry 157237fead6SMichael Halcrow * 158237fead6SMichael Halcrow * This is the code which will grow the file to its correct size. 159237fead6SMichael Halcrow */ 160d7cdc5feSMichael Halcrow static int grow_file(struct dentry *ecryptfs_dentry) 161237fead6SMichael Halcrow { 162d7cdc5feSMichael Halcrow struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode; 163237fead6SMichael Halcrow struct file fake_file; 164237fead6SMichael Halcrow struct ecryptfs_file_info tmp_file_info; 165d7cdc5feSMichael Halcrow char zero_virt[] = { 0x00 }; 166d7cdc5feSMichael Halcrow int rc = 0; 167237fead6SMichael Halcrow 168237fead6SMichael Halcrow memset(&fake_file, 0, sizeof(fake_file)); 169bd243a4bSJosef "Jeff" Sipek fake_file.f_path.dentry = ecryptfs_dentry; 170237fead6SMichael Halcrow memset(&tmp_file_info, 0, sizeof(tmp_file_info)); 171237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_file, &tmp_file_info); 172d7cdc5feSMichael Halcrow ecryptfs_set_file_lower( 173d7cdc5feSMichael Halcrow &fake_file, 174d7cdc5feSMichael Halcrow ecryptfs_inode_to_private(ecryptfs_inode)->lower_file); 175d7cdc5feSMichael Halcrow rc = ecryptfs_write(&fake_file, zero_virt, 0, 1); 176d7cdc5feSMichael Halcrow i_size_write(ecryptfs_inode, 0); 177d7cdc5feSMichael Halcrow rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode); 178d7cdc5feSMichael Halcrow ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat.flags |= 179d7cdc5feSMichael Halcrow ECRYPTFS_NEW_FILE; 180237fead6SMichael Halcrow return rc; 181237fead6SMichael Halcrow } 182237fead6SMichael Halcrow 183237fead6SMichael Halcrow /** 184237fead6SMichael Halcrow * ecryptfs_initialize_file 185237fead6SMichael Halcrow * 186237fead6SMichael Halcrow * Cause the file to be changed from a basic empty file to an ecryptfs 187237fead6SMichael Halcrow * file with a header and first data page. 188237fead6SMichael Halcrow * 189237fead6SMichael Halcrow * Returns zero on success 190237fead6SMichael Halcrow */ 191237fead6SMichael Halcrow static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry) 192237fead6SMichael Halcrow { 193d7cdc5feSMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = 194d7cdc5feSMichael Halcrow &ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat; 195237fead6SMichael Halcrow int rc = 0; 196237fead6SMichael Halcrow 197237fead6SMichael Halcrow if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) { 198237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); 199e2bd99ecSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 200d7cdc5feSMichael Halcrow goto out; 201237fead6SMichael Halcrow } 202e2bd99ecSMichael Halcrow crypt_stat->flags |= ECRYPTFS_NEW_FILE; 203237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n"); 204237fead6SMichael Halcrow rc = ecryptfs_new_file_context(ecryptfs_dentry); 205237fead6SMichael Halcrow if (rc) { 206d7cdc5feSMichael Halcrow ecryptfs_printk(KERN_ERR, "Error creating new file " 207d7cdc5feSMichael Halcrow "context; rc = [%d]\n", rc); 208d7cdc5feSMichael Halcrow goto out; 209237fead6SMichael Halcrow } 210d7cdc5feSMichael Halcrow rc = ecryptfs_write_metadata(ecryptfs_dentry); 211237fead6SMichael Halcrow if (rc) { 212d7cdc5feSMichael Halcrow printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc); 213d7cdc5feSMichael Halcrow goto out; 214237fead6SMichael Halcrow } 215d7cdc5feSMichael Halcrow rc = grow_file(ecryptfs_dentry); 2165dda6992SMichael Halcrow if (rc) 217d7cdc5feSMichael Halcrow printk(KERN_ERR "Error growing file; rc = [%d]\n", rc); 218237fead6SMichael Halcrow out: 219237fead6SMichael Halcrow return rc; 220237fead6SMichael Halcrow } 221237fead6SMichael Halcrow 222237fead6SMichael Halcrow /** 223237fead6SMichael Halcrow * ecryptfs_create 224237fead6SMichael Halcrow * @dir: The inode of the directory in which to create the file. 225237fead6SMichael Halcrow * @dentry: The eCryptfs dentry 226237fead6SMichael Halcrow * @mode: The mode of the new file. 227237fead6SMichael Halcrow * @nd: nameidata 228237fead6SMichael Halcrow * 229237fead6SMichael Halcrow * Creates a new file. 230237fead6SMichael Halcrow * 231237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 232237fead6SMichael Halcrow */ 233237fead6SMichael Halcrow static int 234237fead6SMichael Halcrow ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, 235237fead6SMichael Halcrow int mode, struct nameidata *nd) 236237fead6SMichael Halcrow { 237237fead6SMichael Halcrow int rc; 238237fead6SMichael Halcrow 2394981e081SMichael Halcrow /* ecryptfs_do_create() calls ecryptfs_interpose(), which opens 2404981e081SMichael Halcrow * the crypt_stat->lower_file (persistent file) */ 241237fead6SMichael Halcrow rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd); 242237fead6SMichael Halcrow if (unlikely(rc)) { 243237fead6SMichael Halcrow ecryptfs_printk(KERN_WARNING, "Failed to create file in" 244237fead6SMichael Halcrow "lower filesystem\n"); 245237fead6SMichael Halcrow goto out; 246237fead6SMichael Halcrow } 247237fead6SMichael Halcrow /* At this point, a file exists on "disk"; we need to make sure 248237fead6SMichael Halcrow * that this on disk file is prepared to be an ecryptfs file */ 249237fead6SMichael Halcrow rc = ecryptfs_initialize_file(ecryptfs_dentry); 250237fead6SMichael Halcrow out: 251237fead6SMichael Halcrow return rc; 252237fead6SMichael Halcrow } 253237fead6SMichael Halcrow 254237fead6SMichael Halcrow /** 255237fead6SMichael Halcrow * ecryptfs_lookup 256237fead6SMichael Halcrow * @dir: inode 257237fead6SMichael Halcrow * @dentry: The dentry 258237fead6SMichael Halcrow * @nd: nameidata, may be NULL 259237fead6SMichael Halcrow * 260237fead6SMichael Halcrow * Find a file on disk. If the file does not exist, then we'll add it to the 261237fead6SMichael Halcrow * dentry cache and continue on to read it from the disk. 262237fead6SMichael Halcrow */ 263237fead6SMichael Halcrow static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry, 264237fead6SMichael Halcrow struct nameidata *nd) 265237fead6SMichael Halcrow { 266237fead6SMichael Halcrow int rc = 0; 267237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 268237fead6SMichael Halcrow struct dentry *lower_dentry; 269237fead6SMichael Halcrow struct vfsmount *lower_mnt; 270237fead6SMichael Halcrow char *encoded_name; 271c381bfcfSMika Kukkonen int encoded_namelen; 272237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 273e77a56ddSMichael Halcrow struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 274237fead6SMichael Halcrow char *page_virt = NULL; 275237fead6SMichael Halcrow struct inode *lower_inode; 276237fead6SMichael Halcrow u64 file_size; 277237fead6SMichael Halcrow 278237fead6SMichael Halcrow lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent); 279237fead6SMichael Halcrow dentry->d_op = &ecryptfs_dops; 280237fead6SMichael Halcrow if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, ".")) 28145ec4abaSMichael Halcrow || (dentry->d_name.len == 2 28245ec4abaSMichael Halcrow && !strcmp(dentry->d_name.name, ".."))) { 28345ec4abaSMichael Halcrow d_drop(dentry); 28445ec4abaSMichael Halcrow goto out; 28545ec4abaSMichael Halcrow } 286237fead6SMichael Halcrow encoded_namelen = ecryptfs_encode_filename(crypt_stat, 287237fead6SMichael Halcrow dentry->d_name.name, 288237fead6SMichael Halcrow dentry->d_name.len, 289237fead6SMichael Halcrow &encoded_name); 290237fead6SMichael Halcrow if (encoded_namelen < 0) { 291237fead6SMichael Halcrow rc = encoded_namelen; 29245ec4abaSMichael Halcrow d_drop(dentry); 29345ec4abaSMichael Halcrow goto out; 294237fead6SMichael Halcrow } 295237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen " 296237fead6SMichael Halcrow "= [%d]\n", encoded_name, encoded_namelen); 297237fead6SMichael Halcrow lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry, 298237fead6SMichael Halcrow encoded_namelen - 1); 299237fead6SMichael Halcrow kfree(encoded_name); 300237fead6SMichael Halcrow if (IS_ERR(lower_dentry)) { 301237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n"); 302237fead6SMichael Halcrow rc = PTR_ERR(lower_dentry); 30345ec4abaSMichael Halcrow d_drop(dentry); 30445ec4abaSMichael Halcrow goto out; 305237fead6SMichael Halcrow } 30645ec4abaSMichael Halcrow lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); 307237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->" 308237fead6SMichael Halcrow "d_name.name = [%s]\n", lower_dentry, 309237fead6SMichael Halcrow lower_dentry->d_name.name); 310237fead6SMichael Halcrow lower_inode = lower_dentry->d_inode; 3110cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_atime(dir, lower_dir_dentry->d_inode); 312237fead6SMichael Halcrow BUG_ON(!atomic_read(&lower_dentry->d_count)); 313237fead6SMichael Halcrow ecryptfs_set_dentry_private(dentry, 314237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_dentry_info_cache, 315e94b1766SChristoph Lameter GFP_KERNEL)); 316237fead6SMichael Halcrow if (!ecryptfs_dentry_to_private(dentry)) { 317237fead6SMichael Halcrow rc = -ENOMEM; 318237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting " 319237fead6SMichael Halcrow "to allocate ecryptfs_dentry_info struct\n"); 320237fead6SMichael Halcrow goto out_dput; 321237fead6SMichael Halcrow } 322237fead6SMichael Halcrow ecryptfs_set_dentry_lower(dentry, lower_dentry); 323237fead6SMichael Halcrow ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); 324237fead6SMichael Halcrow if (!lower_dentry->d_inode) { 325237fead6SMichael Halcrow /* We want to add because we couldn't find in lower */ 326237fead6SMichael Halcrow d_add(dentry, NULL); 327237fead6SMichael Halcrow goto out; 328237fead6SMichael Halcrow } 329237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1); 330237fead6SMichael Halcrow if (rc) { 331237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error interposing\n"); 332237fead6SMichael Halcrow goto out_dput; 333237fead6SMichael Halcrow } 334237fead6SMichael Halcrow if (S_ISDIR(lower_inode->i_mode)) { 335237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n"); 336237fead6SMichael Halcrow goto out; 337237fead6SMichael Halcrow } 338237fead6SMichael Halcrow if (S_ISLNK(lower_inode->i_mode)) { 339237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n"); 340237fead6SMichael Halcrow goto out; 341237fead6SMichael Halcrow } 342202a21d6SRyusuke Konishi if (special_file(lower_inode->i_mode)) { 343202a21d6SRyusuke Konishi ecryptfs_printk(KERN_DEBUG, "Is a special file; returning\n"); 344202a21d6SRyusuke Konishi goto out; 345202a21d6SRyusuke Konishi } 346237fead6SMichael Halcrow if (!nd) { 347237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave" 348237fead6SMichael Halcrow "as we *think* we are about to unlink\n"); 349237fead6SMichael Halcrow goto out; 350237fead6SMichael Halcrow } 351237fead6SMichael Halcrow /* Released in this function */ 352c3762229SRobert P. J. Day page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, 353f7267c0cSChristoph Lameter GFP_USER); 354237fead6SMichael Halcrow if (!page_virt) { 355237fead6SMichael Halcrow rc = -ENOMEM; 356237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 357237fead6SMichael Halcrow "Cannot ecryptfs_kmalloc a page\n"); 358237fead6SMichael Halcrow goto out_dput; 359237fead6SMichael Halcrow } 360237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 361e2bd99ecSMichael Halcrow if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) 362237fead6SMichael Halcrow ecryptfs_set_default_sizes(crypt_stat); 363d7cdc5feSMichael Halcrow rc = ecryptfs_read_and_validate_header_region(page_virt, 364d7cdc5feSMichael Halcrow dentry->d_inode); 365237fead6SMichael Halcrow if (rc) { 366dd2a3b7aSMichael Halcrow rc = ecryptfs_read_and_validate_xattr_region(page_virt, dentry); 367dd2a3b7aSMichael Halcrow if (rc) { 368dd2a3b7aSMichael Halcrow printk(KERN_DEBUG "Valid metadata not found in header " 369dd2a3b7aSMichael Halcrow "region or xattr region; treating file as " 370dd2a3b7aSMichael Halcrow "unencrypted\n"); 371237fead6SMichael Halcrow rc = 0; 372237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 373237fead6SMichael Halcrow goto out; 374237fead6SMichael Halcrow } 375dd2a3b7aSMichael Halcrow crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR; 376dd2a3b7aSMichael Halcrow } 377e77a56ddSMichael Halcrow mount_crypt_stat = &ecryptfs_superblock_to_private( 378e77a56ddSMichael Halcrow dentry->d_sb)->mount_crypt_stat; 379e77a56ddSMichael Halcrow if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) { 380e77a56ddSMichael Halcrow if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) 38145eaab79SMichael Halcrow file_size = ((crypt_stat->extent_size 38245eaab79SMichael Halcrow * crypt_stat->num_header_extents_at_front) 383e77a56ddSMichael Halcrow + i_size_read(lower_dentry->d_inode)); 384e77a56ddSMichael Halcrow else 385e77a56ddSMichael Halcrow file_size = i_size_read(lower_dentry->d_inode); 386e77a56ddSMichael Halcrow } else { 387237fead6SMichael Halcrow memcpy(&file_size, page_virt, sizeof(file_size)); 388237fead6SMichael Halcrow file_size = be64_to_cpu(file_size); 389e77a56ddSMichael Halcrow } 390237fead6SMichael Halcrow i_size_write(dentry->d_inode, (loff_t)file_size); 391237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 392237fead6SMichael Halcrow goto out; 393237fead6SMichael Halcrow 394237fead6SMichael Halcrow out_dput: 395237fead6SMichael Halcrow dput(lower_dentry); 396237fead6SMichael Halcrow d_drop(dentry); 397237fead6SMichael Halcrow out: 398237fead6SMichael Halcrow return ERR_PTR(rc); 399237fead6SMichael Halcrow } 400237fead6SMichael Halcrow 401237fead6SMichael Halcrow static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, 402237fead6SMichael Halcrow struct dentry *new_dentry) 403237fead6SMichael Halcrow { 404237fead6SMichael Halcrow struct dentry *lower_old_dentry; 405237fead6SMichael Halcrow struct dentry *lower_new_dentry; 406237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 407237fead6SMichael Halcrow u64 file_size_save; 408237fead6SMichael Halcrow int rc; 409237fead6SMichael Halcrow 410237fead6SMichael Halcrow file_size_save = i_size_read(old_dentry->d_inode); 411237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 412237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 413237fead6SMichael Halcrow dget(lower_old_dentry); 414237fead6SMichael Halcrow dget(lower_new_dentry); 415237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_new_dentry); 416237fead6SMichael Halcrow rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, 417237fead6SMichael Halcrow lower_new_dentry); 418237fead6SMichael Halcrow if (rc || !lower_new_dentry->d_inode) 419237fead6SMichael Halcrow goto out_lock; 420237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0); 421237fead6SMichael Halcrow if (rc) 422237fead6SMichael Halcrow goto out_lock; 4230cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_new_dentry->d_inode); 4240cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_new_dentry->d_inode); 425237fead6SMichael Halcrow old_dentry->d_inode->i_nlink = 426237fead6SMichael Halcrow ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink; 427237fead6SMichael Halcrow i_size_write(new_dentry->d_inode, file_size_save); 428237fead6SMichael Halcrow out_lock: 429237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 430237fead6SMichael Halcrow dput(lower_new_dentry); 431237fead6SMichael Halcrow dput(lower_old_dentry); 432ae56fb16SMichael Halcrow d_drop(lower_old_dentry); 433237fead6SMichael Halcrow d_drop(new_dentry); 43445ec4abaSMichael Halcrow d_drop(old_dentry); 435237fead6SMichael Halcrow return rc; 436237fead6SMichael Halcrow } 437237fead6SMichael Halcrow 438237fead6SMichael Halcrow static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) 439237fead6SMichael Halcrow { 440237fead6SMichael Halcrow int rc = 0; 441237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 442237fead6SMichael Halcrow struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); 443237fead6SMichael Halcrow 444237fead6SMichael Halcrow lock_parent(lower_dentry); 445237fead6SMichael Halcrow rc = vfs_unlink(lower_dir_inode, lower_dentry); 446237fead6SMichael Halcrow if (rc) { 447ae56fb16SMichael Halcrow printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc); 448237fead6SMichael Halcrow goto out_unlock; 449237fead6SMichael Halcrow } 4500cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_inode); 451237fead6SMichael Halcrow dentry->d_inode->i_nlink = 452237fead6SMichael Halcrow ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; 453237fead6SMichael Halcrow dentry->d_inode->i_ctime = dir->i_ctime; 454237fead6SMichael Halcrow out_unlock: 455237fead6SMichael Halcrow unlock_parent(lower_dentry); 456237fead6SMichael Halcrow return rc; 457237fead6SMichael Halcrow } 458237fead6SMichael Halcrow 459237fead6SMichael Halcrow static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, 460237fead6SMichael Halcrow const char *symname) 461237fead6SMichael Halcrow { 462237fead6SMichael Halcrow int rc; 463237fead6SMichael Halcrow struct dentry *lower_dentry; 464237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 465237fead6SMichael Halcrow umode_t mode; 466237fead6SMichael Halcrow char *encoded_symname; 467c381bfcfSMika Kukkonen int encoded_symlen; 468237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 469237fead6SMichael Halcrow 470237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 471237fead6SMichael Halcrow dget(lower_dentry); 472237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 473237fead6SMichael Halcrow mode = S_IALLUGO; 474237fead6SMichael Halcrow encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname, 475237fead6SMichael Halcrow strlen(symname), 476237fead6SMichael Halcrow &encoded_symname); 477237fead6SMichael Halcrow if (encoded_symlen < 0) { 478237fead6SMichael Halcrow rc = encoded_symlen; 479237fead6SMichael Halcrow goto out_lock; 480237fead6SMichael Halcrow } 481237fead6SMichael Halcrow rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, 482237fead6SMichael Halcrow encoded_symname, mode); 483237fead6SMichael Halcrow kfree(encoded_symname); 484237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 485237fead6SMichael Halcrow goto out_lock; 486237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 487237fead6SMichael Halcrow if (rc) 488237fead6SMichael Halcrow goto out_lock; 4890cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 4900cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 491237fead6SMichael Halcrow out_lock: 492237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 493237fead6SMichael Halcrow dput(lower_dentry); 494237fead6SMichael Halcrow if (!dentry->d_inode) 495237fead6SMichael Halcrow d_drop(dentry); 496237fead6SMichael Halcrow return rc; 497237fead6SMichael Halcrow } 498237fead6SMichael Halcrow 499237fead6SMichael Halcrow static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 500237fead6SMichael Halcrow { 501237fead6SMichael Halcrow int rc; 502237fead6SMichael Halcrow struct dentry *lower_dentry; 503237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 504237fead6SMichael Halcrow 505237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 506237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 507237fead6SMichael Halcrow rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); 508237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 509237fead6SMichael Halcrow goto out; 510237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 511237fead6SMichael Halcrow if (rc) 512237fead6SMichael Halcrow goto out; 5130cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 5140cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 515237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 516237fead6SMichael Halcrow out: 517237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 518237fead6SMichael Halcrow if (!dentry->d_inode) 519237fead6SMichael Halcrow d_drop(dentry); 520237fead6SMichael Halcrow return rc; 521237fead6SMichael Halcrow } 522237fead6SMichael Halcrow 523237fead6SMichael Halcrow static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) 524237fead6SMichael Halcrow { 525237fead6SMichael Halcrow struct dentry *lower_dentry; 526237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 52745ec4abaSMichael Halcrow int rc; 528237fead6SMichael Halcrow 529237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 53045ec4abaSMichael Halcrow dget(dentry); 531237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 53245ec4abaSMichael Halcrow dget(lower_dentry); 533237fead6SMichael Halcrow rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); 53445ec4abaSMichael Halcrow dput(lower_dentry); 53545ec4abaSMichael Halcrow if (!rc) 53645ec4abaSMichael Halcrow d_delete(lower_dentry); 5370cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 538237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 539237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 540237fead6SMichael Halcrow if (!rc) 541237fead6SMichael Halcrow d_drop(dentry); 54245ec4abaSMichael Halcrow dput(dentry); 543237fead6SMichael Halcrow return rc; 544237fead6SMichael Halcrow } 545237fead6SMichael Halcrow 546237fead6SMichael Halcrow static int 547237fead6SMichael Halcrow ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) 548237fead6SMichael Halcrow { 549237fead6SMichael Halcrow int rc; 550237fead6SMichael Halcrow struct dentry *lower_dentry; 551237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 552237fead6SMichael Halcrow 553237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 554237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 555237fead6SMichael Halcrow rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); 556237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 557237fead6SMichael Halcrow goto out; 558237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 559237fead6SMichael Halcrow if (rc) 560237fead6SMichael Halcrow goto out; 5610cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode); 5620cc72dc7SJosef "Jeff" Sipek fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode); 563237fead6SMichael Halcrow out: 564237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 565237fead6SMichael Halcrow if (!dentry->d_inode) 566237fead6SMichael Halcrow d_drop(dentry); 567237fead6SMichael Halcrow return rc; 568237fead6SMichael Halcrow } 569237fead6SMichael Halcrow 570237fead6SMichael Halcrow static int 571237fead6SMichael Halcrow ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, 572237fead6SMichael Halcrow struct inode *new_dir, struct dentry *new_dentry) 573237fead6SMichael Halcrow { 574237fead6SMichael Halcrow int rc; 575237fead6SMichael Halcrow struct dentry *lower_old_dentry; 576237fead6SMichael Halcrow struct dentry *lower_new_dentry; 577237fead6SMichael Halcrow struct dentry *lower_old_dir_dentry; 578237fead6SMichael Halcrow struct dentry *lower_new_dir_dentry; 579237fead6SMichael Halcrow 580237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 581237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 582237fead6SMichael Halcrow dget(lower_old_dentry); 583237fead6SMichael Halcrow dget(lower_new_dentry); 584237fead6SMichael Halcrow lower_old_dir_dentry = dget_parent(lower_old_dentry); 585237fead6SMichael Halcrow lower_new_dir_dentry = dget_parent(lower_new_dentry); 586237fead6SMichael Halcrow lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 587237fead6SMichael Halcrow rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, 588237fead6SMichael Halcrow lower_new_dir_dentry->d_inode, lower_new_dentry); 589237fead6SMichael Halcrow if (rc) 590237fead6SMichael Halcrow goto out_lock; 5910cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL); 592237fead6SMichael Halcrow if (new_dir != old_dir) 5930cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL); 594237fead6SMichael Halcrow out_lock: 595237fead6SMichael Halcrow unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 596a9083081SMichael Halcrow dput(lower_new_dentry->d_parent); 597a9083081SMichael Halcrow dput(lower_old_dentry->d_parent); 598237fead6SMichael Halcrow dput(lower_new_dentry); 599237fead6SMichael Halcrow dput(lower_old_dentry); 600237fead6SMichael Halcrow return rc; 601237fead6SMichael Halcrow } 602237fead6SMichael Halcrow 603237fead6SMichael Halcrow static int 604237fead6SMichael Halcrow ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz) 605237fead6SMichael Halcrow { 606237fead6SMichael Halcrow int rc; 607237fead6SMichael Halcrow struct dentry *lower_dentry; 608237fead6SMichael Halcrow char *decoded_name; 609237fead6SMichael Halcrow char *lower_buf; 610237fead6SMichael Halcrow mm_segment_t old_fs; 611237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 612237fead6SMichael Halcrow 613237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 614237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op || 615237fead6SMichael Halcrow !lower_dentry->d_inode->i_op->readlink) { 616237fead6SMichael Halcrow rc = -EINVAL; 617237fead6SMichael Halcrow goto out; 618237fead6SMichael Halcrow } 619237fead6SMichael Halcrow /* Released in this function */ 620237fead6SMichael Halcrow lower_buf = kmalloc(bufsiz, GFP_KERNEL); 621237fead6SMichael Halcrow if (lower_buf == NULL) { 622237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory\n"); 623237fead6SMichael Halcrow rc = -ENOMEM; 624237fead6SMichael Halcrow goto out; 625237fead6SMichael Halcrow } 626237fead6SMichael Halcrow old_fs = get_fs(); 627237fead6SMichael Halcrow set_fs(get_ds()); 628237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 629237fead6SMichael Halcrow "lower_dentry->d_name.name = [%s]\n", 630237fead6SMichael Halcrow lower_dentry->d_name.name); 631237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, 632237fead6SMichael Halcrow (char __user *)lower_buf, 633237fead6SMichael Halcrow bufsiz); 634237fead6SMichael Halcrow set_fs(old_fs); 635237fead6SMichael Halcrow if (rc >= 0) { 636237fead6SMichael Halcrow crypt_stat = NULL; 637237fead6SMichael Halcrow rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc, 638237fead6SMichael Halcrow &decoded_name); 639237fead6SMichael Halcrow if (rc == -ENOMEM) 640237fead6SMichael Halcrow goto out_free_lower_buf; 641237fead6SMichael Halcrow if (rc > 0) { 642237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes " 643237fead6SMichael Halcrow "to userspace: [%*s]\n", rc, 644237fead6SMichael Halcrow decoded_name); 645237fead6SMichael Halcrow if (copy_to_user(buf, decoded_name, rc)) 646237fead6SMichael Halcrow rc = -EFAULT; 647237fead6SMichael Halcrow } 648237fead6SMichael Halcrow kfree(decoded_name); 6490cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_atime(dentry->d_inode, 650237fead6SMichael Halcrow lower_dentry->d_inode); 651237fead6SMichael Halcrow } 652237fead6SMichael Halcrow out_free_lower_buf: 653237fead6SMichael Halcrow kfree(lower_buf); 654237fead6SMichael Halcrow out: 655237fead6SMichael Halcrow return rc; 656237fead6SMichael Halcrow } 657237fead6SMichael Halcrow 658237fead6SMichael Halcrow static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) 659237fead6SMichael Halcrow { 660237fead6SMichael Halcrow char *buf; 661237fead6SMichael Halcrow int len = PAGE_SIZE, rc; 662237fead6SMichael Halcrow mm_segment_t old_fs; 663237fead6SMichael Halcrow 664237fead6SMichael Halcrow /* Released in ecryptfs_put_link(); only release here on error */ 665237fead6SMichael Halcrow buf = kmalloc(len, GFP_KERNEL); 666237fead6SMichael Halcrow if (!buf) { 667237fead6SMichael Halcrow rc = -ENOMEM; 668237fead6SMichael Halcrow goto out; 669237fead6SMichael Halcrow } 670237fead6SMichael Halcrow old_fs = get_fs(); 671237fead6SMichael Halcrow set_fs(get_ds()); 672237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 673237fead6SMichael Halcrow "dentry->d_name.name = [%s]\n", dentry->d_name.name); 674237fead6SMichael Halcrow rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len); 675237fead6SMichael Halcrow buf[rc] = '\0'; 676237fead6SMichael Halcrow set_fs(old_fs); 677237fead6SMichael Halcrow if (rc < 0) 678237fead6SMichael Halcrow goto out_free; 679237fead6SMichael Halcrow rc = 0; 680237fead6SMichael Halcrow nd_set_link(nd, buf); 681237fead6SMichael Halcrow goto out; 682237fead6SMichael Halcrow out_free: 683237fead6SMichael Halcrow kfree(buf); 684237fead6SMichael Halcrow out: 685237fead6SMichael Halcrow return ERR_PTR(rc); 686237fead6SMichael Halcrow } 687237fead6SMichael Halcrow 688237fead6SMichael Halcrow static void 689237fead6SMichael Halcrow ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) 690237fead6SMichael Halcrow { 691237fead6SMichael Halcrow /* Free the char* */ 692237fead6SMichael Halcrow kfree(nd_get_link(nd)); 693237fead6SMichael Halcrow } 694237fead6SMichael Halcrow 695237fead6SMichael Halcrow /** 696237fead6SMichael Halcrow * upper_size_to_lower_size 697237fead6SMichael Halcrow * @crypt_stat: Crypt_stat associated with file 698237fead6SMichael Halcrow * @upper_size: Size of the upper file 699237fead6SMichael Halcrow * 700237fead6SMichael Halcrow * Calculate the requried size of the lower file based on the 701237fead6SMichael Halcrow * specified size of the upper file. This calculation is based on the 702237fead6SMichael Halcrow * number of headers in the underlying file and the extent size. 703237fead6SMichael Halcrow * 704237fead6SMichael Halcrow * Returns Calculated size of the lower file. 705237fead6SMichael Halcrow */ 706237fead6SMichael Halcrow static loff_t 707237fead6SMichael Halcrow upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, 708237fead6SMichael Halcrow loff_t upper_size) 709237fead6SMichael Halcrow { 710237fead6SMichael Halcrow loff_t lower_size; 711237fead6SMichael Halcrow 71245eaab79SMichael Halcrow lower_size = (crypt_stat->extent_size 713237fead6SMichael Halcrow * crypt_stat->num_header_extents_at_front); 714237fead6SMichael Halcrow if (upper_size != 0) { 715237fead6SMichael Halcrow loff_t num_extents; 716237fead6SMichael Halcrow 717237fead6SMichael Halcrow num_extents = upper_size >> crypt_stat->extent_shift; 718237fead6SMichael Halcrow if (upper_size & ~crypt_stat->extent_mask) 719237fead6SMichael Halcrow num_extents++; 720237fead6SMichael Halcrow lower_size += (num_extents * crypt_stat->extent_size); 721237fead6SMichael Halcrow } 722237fead6SMichael Halcrow return lower_size; 723237fead6SMichael Halcrow } 724237fead6SMichael Halcrow 725237fead6SMichael Halcrow /** 726237fead6SMichael Halcrow * ecryptfs_truncate 727237fead6SMichael Halcrow * @dentry: The ecryptfs layer dentry 728237fead6SMichael Halcrow * @new_length: The length to expand the file to 729237fead6SMichael Halcrow * 730237fead6SMichael Halcrow * Function to handle truncations modifying the size of the file. Note 731237fead6SMichael Halcrow * that the file sizes are interpolated. When expanding, we are simply 732237fead6SMichael Halcrow * writing strings of 0's out. When truncating, we need to modify the 733237fead6SMichael Halcrow * underlying file size according to the page index interpolations. 734237fead6SMichael Halcrow * 735237fead6SMichael Halcrow * Returns zero on success; non-zero otherwise 736237fead6SMichael Halcrow */ 737237fead6SMichael Halcrow int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) 738237fead6SMichael Halcrow { 739237fead6SMichael Halcrow int rc = 0; 740237fead6SMichael Halcrow struct inode *inode = dentry->d_inode; 741237fead6SMichael Halcrow struct dentry *lower_dentry; 7422ed92554SMichael Halcrow struct file fake_ecryptfs_file; 743237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 744237fead6SMichael Halcrow loff_t i_size = i_size_read(inode); 745237fead6SMichael Halcrow loff_t lower_size_before_truncate; 746237fead6SMichael Halcrow loff_t lower_size_after_truncate; 747237fead6SMichael Halcrow 748237fead6SMichael Halcrow if (unlikely((new_length == i_size))) 749237fead6SMichael Halcrow goto out; 750237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 751237fead6SMichael Halcrow /* Set up a fake ecryptfs file, this is used to interface with 752237fead6SMichael Halcrow * the file in the underlying filesystem so that the 753237fead6SMichael Halcrow * truncation has an effect there as well. */ 754237fead6SMichael Halcrow memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file)); 755bd243a4bSJosef "Jeff" Sipek fake_ecryptfs_file.f_path.dentry = dentry; 756237fead6SMichael Halcrow /* Released at out_free: label */ 757237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_ecryptfs_file, 758237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_file_info_cache, 759e94b1766SChristoph Lameter GFP_KERNEL)); 760237fead6SMichael Halcrow if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) { 761237fead6SMichael Halcrow rc = -ENOMEM; 762237fead6SMichael Halcrow goto out; 763237fead6SMichael Halcrow } 764237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 7652ed92554SMichael Halcrow ecryptfs_set_file_lower( 7662ed92554SMichael Halcrow &fake_ecryptfs_file, 7672ed92554SMichael Halcrow ecryptfs_inode_to_private(dentry->d_inode)->lower_file); 768237fead6SMichael Halcrow /* Switch on growing or shrinking file */ 769237fead6SMichael Halcrow if (new_length > i_size) { 7702ed92554SMichael Halcrow char zero[] = { 0x00 }; 771240e2df5SMichael Halcrow 7722ed92554SMichael Halcrow /* Write a single 0 at the last position of the file; 7732ed92554SMichael Halcrow * this triggers code that will fill in 0's throughout 7742ed92554SMichael Halcrow * the intermediate portion of the previous end of the 7752ed92554SMichael Halcrow * file and the new and of the file */ 7762ed92554SMichael Halcrow rc = ecryptfs_write(&fake_ecryptfs_file, zero, 7772ed92554SMichael Halcrow (new_length - 1), 1); 7782ed92554SMichael Halcrow } else { /* new_length < i_size_read(inode) */ 7792ed92554SMichael Halcrow /* We're chopping off all the pages down do the page 7802ed92554SMichael Halcrow * in which new_length is located. Fill in the end of 7812ed92554SMichael Halcrow * that page from (new_length & ~PAGE_CACHE_MASK) to 7822ed92554SMichael Halcrow * PAGE_CACHE_SIZE with zeros. */ 7832ed92554SMichael Halcrow size_t num_zeros = (PAGE_CACHE_SIZE 7842ed92554SMichael Halcrow - (new_length & ~PAGE_CACHE_MASK)); 7852ed92554SMichael Halcrow 7862ed92554SMichael Halcrow if (num_zeros) { 7872ed92554SMichael Halcrow char *zeros_virt; 7882ed92554SMichael Halcrow 7892ed92554SMichael Halcrow zeros_virt = kzalloc(num_zeros, GFP_KERNEL); 7902ed92554SMichael Halcrow if (!zeros_virt) { 7912ed92554SMichael Halcrow rc = -ENOMEM; 7922ed92554SMichael Halcrow goto out_free; 793240e2df5SMichael Halcrow } 7942ed92554SMichael Halcrow rc = ecryptfs_write(&fake_ecryptfs_file, zeros_virt, 7952ed92554SMichael Halcrow new_length, num_zeros); 7962ed92554SMichael Halcrow kfree(zeros_virt); 7975dda6992SMichael Halcrow if (rc) { 798240e2df5SMichael Halcrow printk(KERN_ERR "Error attempting to zero out " 799240e2df5SMichael Halcrow "the remainder of the end page on " 800240e2df5SMichael Halcrow "reducing truncate; rc = [%d]\n", rc); 8012ed92554SMichael Halcrow goto out_free; 802240e2df5SMichael Halcrow } 803240e2df5SMichael Halcrow } 804237fead6SMichael Halcrow vmtruncate(inode, new_length); 8050216f7f7SMichael Halcrow rc = ecryptfs_write_inode_size_to_metadata(inode); 806dd2a3b7aSMichael Halcrow if (rc) { 807dd2a3b7aSMichael Halcrow printk(KERN_ERR "Problem with " 808dd2a3b7aSMichael Halcrow "ecryptfs_write_inode_size_to_metadata; " 809dd2a3b7aSMichael Halcrow "rc = [%d]\n", rc); 8102ed92554SMichael Halcrow goto out_free; 811dd2a3b7aSMichael Halcrow } 812237fead6SMichael Halcrow /* We are reducing the size of the ecryptfs file, and need to 813237fead6SMichael Halcrow * know if we need to reduce the size of the lower file. */ 814237fead6SMichael Halcrow lower_size_before_truncate = 815237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, i_size); 816237fead6SMichael Halcrow lower_size_after_truncate = 817237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, new_length); 818237fead6SMichael Halcrow if (lower_size_after_truncate < lower_size_before_truncate) 819237fead6SMichael Halcrow vmtruncate(lower_dentry->d_inode, 820237fead6SMichael Halcrow lower_size_after_truncate); 821237fead6SMichael Halcrow } 822237fead6SMichael Halcrow out_free: 823237fead6SMichael Halcrow if (ecryptfs_file_to_private(&fake_ecryptfs_file)) 824237fead6SMichael Halcrow kmem_cache_free(ecryptfs_file_info_cache, 825237fead6SMichael Halcrow ecryptfs_file_to_private(&fake_ecryptfs_file)); 826237fead6SMichael Halcrow out: 827237fead6SMichael Halcrow return rc; 828237fead6SMichael Halcrow } 829237fead6SMichael Halcrow 830237fead6SMichael Halcrow static int 831237fead6SMichael Halcrow ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd) 832237fead6SMichael Halcrow { 833237fead6SMichael Halcrow int rc; 834237fead6SMichael Halcrow 835237fead6SMichael Halcrow if (nd) { 836237fead6SMichael Halcrow struct vfsmount *vfsmnt_save = nd->mnt; 837237fead6SMichael Halcrow struct dentry *dentry_save = nd->dentry; 838237fead6SMichael Halcrow 839237fead6SMichael Halcrow nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry); 840237fead6SMichael Halcrow nd->dentry = ecryptfs_dentry_to_lower(nd->dentry); 841237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, nd); 842237fead6SMichael Halcrow nd->mnt = vfsmnt_save; 843237fead6SMichael Halcrow nd->dentry = dentry_save; 844237fead6SMichael Halcrow } else 845237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL); 846237fead6SMichael Halcrow return rc; 847237fead6SMichael Halcrow } 848237fead6SMichael Halcrow 849237fead6SMichael Halcrow /** 850237fead6SMichael Halcrow * ecryptfs_setattr 851237fead6SMichael Halcrow * @dentry: dentry handle to the inode to modify 852237fead6SMichael Halcrow * @ia: Structure with flags of what to change and values 853237fead6SMichael Halcrow * 854237fead6SMichael Halcrow * Updates the metadata of an inode. If the update is to the size 855237fead6SMichael Halcrow * i.e. truncation, then ecryptfs_truncate will handle the size modification 856237fead6SMichael Halcrow * of both the ecryptfs inode and the lower inode. 857237fead6SMichael Halcrow * 858237fead6SMichael Halcrow * All other metadata changes will be passed right to the lower filesystem, 859237fead6SMichael Halcrow * and we will just update our inode to look like the lower. 860237fead6SMichael Halcrow */ 861237fead6SMichael Halcrow static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) 862237fead6SMichael Halcrow { 863237fead6SMichael Halcrow int rc = 0; 864237fead6SMichael Halcrow struct dentry *lower_dentry; 865237fead6SMichael Halcrow struct inode *inode; 866237fead6SMichael Halcrow struct inode *lower_inode; 867237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 868237fead6SMichael Halcrow 869237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 870e10f281bSMichael Halcrow if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) 871e10f281bSMichael Halcrow ecryptfs_init_crypt_stat(crypt_stat); 872237fead6SMichael Halcrow inode = dentry->d_inode; 873237fead6SMichael Halcrow lower_inode = ecryptfs_inode_to_lower(inode); 874e10f281bSMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 875e10f281bSMichael Halcrow mutex_lock(&crypt_stat->cs_mutex); 876e10f281bSMichael Halcrow if (S_ISDIR(dentry->d_inode->i_mode)) 877e10f281bSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 87864ee4808SMichael Halcrow else if (S_ISREG(dentry->d_inode->i_mode) 87964ee4808SMichael Halcrow && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED) 88064ee4808SMichael Halcrow || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) { 881e10f281bSMichael Halcrow struct ecryptfs_mount_crypt_stat *mount_crypt_stat; 882e10f281bSMichael Halcrow 883e10f281bSMichael Halcrow mount_crypt_stat = &ecryptfs_superblock_to_private( 884e10f281bSMichael Halcrow dentry->d_sb)->mount_crypt_stat; 885d7cdc5feSMichael Halcrow rc = ecryptfs_read_metadata(dentry); 8865dda6992SMichael Halcrow if (rc) { 887e10f281bSMichael Halcrow if (!(mount_crypt_stat->flags 888e10f281bSMichael Halcrow & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) { 889e10f281bSMichael Halcrow rc = -EIO; 890e10f281bSMichael Halcrow printk(KERN_WARNING "Attempt to read file that " 891e10f281bSMichael Halcrow "is not in a valid eCryptfs format, " 892e10f281bSMichael Halcrow "and plaintext passthrough mode is not " 893e10f281bSMichael Halcrow "enabled; returning -EIO\n"); 894e10f281bSMichael Halcrow 895e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 896e10f281bSMichael Halcrow goto out; 897e10f281bSMichael Halcrow } 898e10f281bSMichael Halcrow rc = 0; 899e10f281bSMichael Halcrow crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); 900e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 901e10f281bSMichael Halcrow goto out; 902e10f281bSMichael Halcrow } 903e10f281bSMichael Halcrow } 904e10f281bSMichael Halcrow mutex_unlock(&crypt_stat->cs_mutex); 905237fead6SMichael Halcrow if (ia->ia_valid & ATTR_SIZE) { 906237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, 907237fead6SMichael Halcrow "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n", 908237fead6SMichael Halcrow ia->ia_valid, ATTR_SIZE); 909237fead6SMichael Halcrow rc = ecryptfs_truncate(dentry, ia->ia_size); 910237fead6SMichael Halcrow /* ecryptfs_truncate handles resizing of the lower file */ 911237fead6SMichael Halcrow ia->ia_valid &= ~ATTR_SIZE; 912237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n", 913237fead6SMichael Halcrow ia->ia_valid); 914237fead6SMichael Halcrow if (rc < 0) 915237fead6SMichael Halcrow goto out; 916237fead6SMichael Halcrow } 9171ac564ecSJeff Layton 9181ac564ecSJeff Layton /* 9191ac564ecSJeff Layton * mode change is for clearing setuid/setgid bits. Allow lower fs 9201ac564ecSJeff Layton * to interpret this in its own way. 9211ac564ecSJeff Layton */ 9221ac564ecSJeff Layton if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) 9231ac564ecSJeff Layton ia->ia_valid &= ~ATTR_MODE; 9241ac564ecSJeff Layton 925237fead6SMichael Halcrow rc = notify_change(lower_dentry, ia); 926237fead6SMichael Halcrow out: 9270cc72dc7SJosef "Jeff" Sipek fsstack_copy_attr_all(inode, lower_inode, NULL); 928237fead6SMichael Halcrow return rc; 929237fead6SMichael Halcrow } 930237fead6SMichael Halcrow 931dd2a3b7aSMichael Halcrow int 932237fead6SMichael Halcrow ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, 933237fead6SMichael Halcrow size_t size, int flags) 934237fead6SMichael Halcrow { 935237fead6SMichael Halcrow int rc = 0; 936237fead6SMichael Halcrow struct dentry *lower_dentry; 937237fead6SMichael Halcrow 938237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 939237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->setxattr) { 940237fead6SMichael Halcrow rc = -ENOSYS; 941237fead6SMichael Halcrow goto out; 942237fead6SMichael Halcrow } 943237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 944237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, 945237fead6SMichael Halcrow size, flags); 946237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 947237fead6SMichael Halcrow out: 948237fead6SMichael Halcrow return rc; 949237fead6SMichael Halcrow } 950237fead6SMichael Halcrow 951dd2a3b7aSMichael Halcrow ssize_t 952d7cdc5feSMichael Halcrow ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, 953d7cdc5feSMichael Halcrow void *value, size_t size) 954d7cdc5feSMichael Halcrow { 955d7cdc5feSMichael Halcrow int rc = 0; 956d7cdc5feSMichael Halcrow 957d7cdc5feSMichael Halcrow if (!lower_dentry->d_inode->i_op->getxattr) { 958d7cdc5feSMichael Halcrow rc = -ENOSYS; 959d7cdc5feSMichael Halcrow goto out; 960d7cdc5feSMichael Halcrow } 961d7cdc5feSMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 962d7cdc5feSMichael Halcrow rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, 963d7cdc5feSMichael Halcrow size); 964d7cdc5feSMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 965d7cdc5feSMichael Halcrow out: 966d7cdc5feSMichael Halcrow return rc; 967d7cdc5feSMichael Halcrow } 968d7cdc5feSMichael Halcrow 969d7cdc5feSMichael Halcrow ssize_t 970237fead6SMichael Halcrow ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, 971237fead6SMichael Halcrow size_t size) 972237fead6SMichael Halcrow { 9732ed92554SMichael Halcrow return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name, 9742ed92554SMichael Halcrow value, size); 975237fead6SMichael Halcrow } 976237fead6SMichael Halcrow 977237fead6SMichael Halcrow static ssize_t 978237fead6SMichael Halcrow ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) 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->listxattr) { 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->listxattr(lower_dentry, list, size); 990237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 991237fead6SMichael Halcrow out: 992237fead6SMichael Halcrow return rc; 993237fead6SMichael Halcrow } 994237fead6SMichael Halcrow 995237fead6SMichael Halcrow static int ecryptfs_removexattr(struct dentry *dentry, const char *name) 996237fead6SMichael Halcrow { 997237fead6SMichael Halcrow int rc = 0; 998237fead6SMichael Halcrow struct dentry *lower_dentry; 999237fead6SMichael Halcrow 1000237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 1001237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->removexattr) { 1002237fead6SMichael Halcrow rc = -ENOSYS; 1003237fead6SMichael Halcrow goto out; 1004237fead6SMichael Halcrow } 1005237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 1006237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); 1007237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 1008237fead6SMichael Halcrow out: 1009237fead6SMichael Halcrow return rc; 1010237fead6SMichael Halcrow } 1011237fead6SMichael Halcrow 1012237fead6SMichael Halcrow int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode) 1013237fead6SMichael Halcrow { 1014237fead6SMichael Halcrow if ((ecryptfs_inode_to_lower(inode) 1015237fead6SMichael Halcrow == (struct inode *)candidate_lower_inode)) 1016237fead6SMichael Halcrow return 1; 1017237fead6SMichael Halcrow else 1018237fead6SMichael Halcrow return 0; 1019237fead6SMichael Halcrow } 1020237fead6SMichael Halcrow 1021237fead6SMichael Halcrow int ecryptfs_inode_set(struct inode *inode, void *lower_inode) 1022237fead6SMichael Halcrow { 1023237fead6SMichael Halcrow ecryptfs_init_inode(inode, (struct inode *)lower_inode); 1024237fead6SMichael Halcrow return 0; 1025237fead6SMichael Halcrow } 1026237fead6SMichael Halcrow 1027754661f1SArjan van de Ven const struct inode_operations ecryptfs_symlink_iops = { 1028237fead6SMichael Halcrow .readlink = ecryptfs_readlink, 1029237fead6SMichael Halcrow .follow_link = ecryptfs_follow_link, 1030237fead6SMichael Halcrow .put_link = ecryptfs_put_link, 1031237fead6SMichael Halcrow .permission = ecryptfs_permission, 1032237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1033237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1034237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1035237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1036237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1037237fead6SMichael Halcrow }; 1038237fead6SMichael Halcrow 1039754661f1SArjan van de Ven const struct inode_operations ecryptfs_dir_iops = { 1040237fead6SMichael Halcrow .create = ecryptfs_create, 1041237fead6SMichael Halcrow .lookup = ecryptfs_lookup, 1042237fead6SMichael Halcrow .link = ecryptfs_link, 1043237fead6SMichael Halcrow .unlink = ecryptfs_unlink, 1044237fead6SMichael Halcrow .symlink = ecryptfs_symlink, 1045237fead6SMichael Halcrow .mkdir = ecryptfs_mkdir, 1046237fead6SMichael Halcrow .rmdir = ecryptfs_rmdir, 1047237fead6SMichael Halcrow .mknod = ecryptfs_mknod, 1048237fead6SMichael Halcrow .rename = ecryptfs_rename, 1049237fead6SMichael Halcrow .permission = ecryptfs_permission, 1050237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1051237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1052237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1053237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1054237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1055237fead6SMichael Halcrow }; 1056237fead6SMichael Halcrow 1057754661f1SArjan van de Ven const struct inode_operations ecryptfs_main_iops = { 1058237fead6SMichael Halcrow .permission = ecryptfs_permission, 1059237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1060237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1061237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1062237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1063237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1064237fead6SMichael Halcrow }; 1065