fs/ecryptfs/inode.c

   1 /**
   2  * eCryptfs: Linux filesystem encryption layer
   3  *
   4  * Copyright (C) 1997-2004 Erez Zadok
   5  * Copyright (C) 2001-2004 Stony Brook University
   6  * Copyright (C) 2004-2007 International Business Machines Corp.
   7  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
   8  *              Michael C. Thompsion <mcthomps@us.ibm.com>
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of the
  13  * License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  23  * 02111-1307, USA.
  24  */
  25
  26 #include <linux/file.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/pagemap.h>
  29 #include <linux/dcache.h>
  30 #include <linux/namei.h>
  31 #include <linux/mount.h>
  32 #include <linux/crypto.h>
  33 #include <linux/fs_stack.h>
  34 #include <linux/slab.h>
  35 #include <linux/xattr.h>
  36 #include <asm/unaligned.h>
  37 #include "ecryptfs_kernel.h"
  38
  39 static struct dentry *lock_parent(struct dentry *dentry)
  40 {
  41         struct dentry *dir;
  42
  43         dir = dget_parent(dentry);
  44         mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT);
  45         return dir;
  46 }
  47
  48 static void unlock_dir(struct dentry *dir)
  49 {
  50         mutex_unlock(&dir->d_inode->i_mutex);
  51         dput(dir);
  52 }
  53
  54 static int ecryptfs_inode_test(struct inode *inode, void *lower_inode)
  55 {
  56         if (ecryptfs_inode_to_lower(inode) == (struct inode *)lower_inode)
  57                 return 1;
  58         return 0;
  59 }
  60
  61 static int ecryptfs_inode_set(struct inode *inode, void *opaque)
  62 {
  63         struct inode *lower_inode = opaque;
  64
  65         ecryptfs_set_inode_lower(inode, lower_inode);
  66         fsstack_copy_attr_all(inode, lower_inode);
  67         /* i_size will be overwritten for encrypted regular files */
  68         fsstack_copy_inode_size(inode, lower_inode);
  69         inode->i_ino = lower_inode->i_ino;
  70         inode->i_version++;
  71         inode->i_mapping->a_ops = &ecryptfs_aops;
  72         inode->i_mapping->backing_dev_info = inode->i_sb->s_bdi;
  73
  74         if (S_ISLNK(inode->i_mode))
  75                 inode->i_op = &ecryptfs_symlink_iops;
  76         else if (S_ISDIR(inode->i_mode))
  77                 inode->i_op = &ecryptfs_dir_iops;
  78         else
  79                 inode->i_op = &ecryptfs_main_iops;
  80
  81         if (S_ISDIR(inode->i_mode))
  82                 inode->i_fop = &ecryptfs_dir_fops;
  83         else if (special_file(inode->i_mode))
  84                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
  85         else
  86                 inode->i_fop = &ecryptfs_main_fops;
  87
  88         return 0;
  89 }
  90
  91 static struct inode *__ecryptfs_get_inode(struct inode *lower_inode,
  92                                           struct super_block *sb)
  93 {
  94         struct inode *inode;
  95
  96         if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb))
  97                 return ERR_PTR(-EXDEV);
  98         if (!igrab(lower_inode))
  99                 return ERR_PTR(-ESTALE);
 100         inode = iget5_locked(sb, (unsigned long)lower_inode,
 101                              ecryptfs_inode_test, ecryptfs_inode_set,
 102                              lower_inode);
 103         if (!inode) {
 104                 iput(lower_inode);
 105                 return ERR_PTR(-EACCES);
 106         }
 107         if (!(inode->i_state & I_NEW))
 108                 iput(lower_inode);
 109
 110         return inode;
 111 }
 112
 113 struct inode *ecryptfs_get_inode(struct inode *lower_inode,
 114                                  struct super_block *sb)
 115 {
 116         struct inode *inode = __ecryptfs_get_inode(lower_inode, sb);
 117
 118         if (!IS_ERR(inode) && (inode->i_state & I_NEW))
 119                 unlock_new_inode(inode);
 120
 121         return inode;
 122 }
 123
 124 /**
 125  * ecryptfs_interpose
 126  * @lower_dentry: Existing dentry in the lower filesystem
 127  * @dentry: ecryptfs' dentry
 128  * @sb: ecryptfs's super_block
 129  *
 130  * Interposes upper and lower dentries.
 131  *
 132  * Returns zero on success; non-zero otherwise
 133  */
 134 static int ecryptfs_interpose(struct dentry *lower_dentry,
 135                               struct dentry *dentry, struct super_block *sb)
 136 {
 137         struct inode *inode = ecryptfs_get_inode(lower_dentry->d_inode, sb);
 138
 139         if (IS_ERR(inode))
 140                 return PTR_ERR(inode);
 141         d_instantiate(dentry, inode);
 142
 143         return 0;
 144 }
 145
 146 static int ecryptfs_do_unlink(struct inode *dir, struct dentry *dentry,
 147                               struct inode *inode)
 148 {
 149         struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
 150         struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
 151         struct dentry *lower_dir_dentry;
 152         int rc;
 153
 154         dget(lower_dentry);
 155         lower_dir_dentry = lock_parent(lower_dentry);
 156         rc = vfs_unlink(lower_dir_inode, lower_dentry);
 157         if (rc) {
 158                 printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
 159                 goto out_unlock;
 160         }
 161         fsstack_copy_attr_times(dir, lower_dir_inode);
 162         set_nlink(inode, ecryptfs_inode_to_lower(inode)->i_nlink);
 163         inode->i_ctime = dir->i_ctime;
 164         d_drop(dentry);
 165 out_unlock:
 166         unlock_dir(lower_dir_dentry);
 167         dput(lower_dentry);
 168         return rc;
 169 }
 170
 171 /**
 172  * ecryptfs_do_create
 173  * @directory_inode: inode of the new file's dentry's parent in ecryptfs
 174  * @ecryptfs_dentry: New file's dentry in ecryptfs
 175  * @mode: The mode of the new file
 176  * @nd: nameidata of ecryptfs' parent's dentry & vfsmount
 177  *
 178  * Creates the underlying file and the eCryptfs inode which will link to
 179  * it. It will also update the eCryptfs directory inode to mimic the
 180  * stat of the lower directory inode.
 181  *
 182  * Returns the new eCryptfs inode on success; an ERR_PTR on error condition
 183  */
 184 static struct inode *
 185 ecryptfs_do_create(struct inode *directory_inode,
 186                    struct dentry *ecryptfs_dentry, umode_t mode)
 187 {
 188         int rc;
 189         struct dentry *lower_dentry;
 190         struct dentry *lower_dir_dentry;
 191         struct inode *inode;
 192
 193         lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
 194         lower_dir_dentry = lock_parent(lower_dentry);
 195         if (IS_ERR(lower_dir_dentry)) {
 196                 ecryptfs_printk(KERN_ERR, "Error locking directory of "
 197                                 "dentry\n");
 198                 inode = ERR_CAST(lower_dir_dentry);
 199                 goto out;
 200         }
 201         rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, NULL);
 202         if (rc) {
 203                 printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
 204                        "rc = [%d]\n", __func__, rc);
 205                 inode = ERR_PTR(rc);
 206                 goto out_lock;
 207         }
 208         inode = __ecryptfs_get_inode(lower_dentry->d_inode,
 209                                      directory_inode->i_sb);
 210         if (IS_ERR(inode)) {
 211                 vfs_unlink(lower_dir_dentry->d_inode, lower_dentry);
 212                 goto out_lock;
 213         }
 214         fsstack_copy_attr_times(directory_inode, lower_dir_dentry->d_inode);
 215         fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode);
 216 out_lock:
 217         unlock_dir(lower_dir_dentry);
 218 out:
 219         return inode;
 220 }
 221
 222 /**
 223  * ecryptfs_initialize_file
 224  *
 225  * Cause the file to be changed from a basic empty file to an ecryptfs
 226  * file with a header and first data page.
 227  *
 228  * Returns zero on success
 229  */
 230 int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
 231                              struct inode *ecryptfs_inode)
 232 {
 233         struct ecryptfs_crypt_stat *crypt_stat =
 234                 &ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat;
 235         int rc = 0;
 236
 237         if (S_ISDIR(ecryptfs_inode->i_mode)) {
 238                 ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
 239                 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
 240                 goto out;
 241         }
 242         ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n");
 243         rc = ecryptfs_new_file_context(ecryptfs_inode);
 244         if (rc) {
 245                 ecryptfs_printk(KERN_ERR, "Error creating new file "
 246                                 "context; rc = [%d]\n", rc);
 247                 goto out;
 248         }
 249         rc = ecryptfs_get_lower_file(ecryptfs_dentry, ecryptfs_inode);
 250         if (rc) {
 251                 printk(KERN_ERR "%s: Error attempting to initialize "
 252                         "the lower file for the dentry with name "
 253                         "[%s]; rc = [%d]\n", __func__,
 254                         ecryptfs_dentry->d_name.name, rc);
 255                 goto out;
 256         }
 257         rc = ecryptfs_write_metadata(ecryptfs_dentry, ecryptfs_inode);
 258         if (rc)
 259                 printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc);
 260         ecryptfs_put_lower_file(ecryptfs_inode);
 261 out:
 262         return rc;
 263 }
 264
 265 /**
 266  * ecryptfs_create
 267  * @dir: The inode of the directory in which to create the file.
 268  * @dentry: The eCryptfs dentry
 269  * @mode: The mode of the new file.
 270  * @nd: nameidata
 271  *
 272  * Creates a new file.
 273  *
 274  * Returns zero on success; non-zero on error condition
 275  */
 276 static int
 277 ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
 278                 umode_t mode, struct nameidata *nd)
 279 {
 280         struct inode *ecryptfs_inode;
 281         int rc;
 282
 283         ecryptfs_inode = ecryptfs_do_create(directory_inode, ecryptfs_dentry,
 284                                             mode);
 285         if (unlikely(IS_ERR(ecryptfs_inode))) {
 286                 ecryptfs_printk(KERN_WARNING, "Failed to create file in"
 287                                 "lower filesystem\n");
 288                 rc = PTR_ERR(ecryptfs_inode);
 289                 goto out;
 290         }
 291         /* At this point, a file exists on "disk"; we need to make sure
 292          * that this on disk file is prepared to be an ecryptfs file */
 293         rc = ecryptfs_initialize_file(ecryptfs_dentry, ecryptfs_inode);
 294         if (rc) {
 295                 ecryptfs_do_unlink(directory_inode, ecryptfs_dentry,
 296                                    ecryptfs_inode);
 297                 make_bad_inode(ecryptfs_inode);
 298                 unlock_new_inode(ecryptfs_inode);
 299                 iput(ecryptfs_inode);
 300                 goto out;
 301         }
 302         d_instantiate(ecryptfs_dentry, ecryptfs_inode);
 303         unlock_new_inode(ecryptfs_inode);
 304 out:
 305         return rc;
 306 }
 307
 308 static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode)
 309 {
 310         struct ecryptfs_crypt_stat *crypt_stat;
 311         int rc;
 312
 313         rc = ecryptfs_get_lower_file(dentry, inode);
 314         if (rc) {
 315                 printk(KERN_ERR "%s: Error attempting to initialize "
 316                         "the lower file for the dentry with name "
 317                         "[%s]; rc = [%d]\n", __func__,
 318                         dentry->d_name.name, rc);
 319                 return rc;
 320         }
 321
 322         crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
 323         /* TODO: lock for crypt_stat comparison */
 324         if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
 325                 ecryptfs_set_default_sizes(crypt_stat);
 326
 327         rc = ecryptfs_read_and_validate_header_region(inode);
 328         ecryptfs_put_lower_file(inode);
 329         if (rc) {
 330                 rc = ecryptfs_read_and_validate_xattr_region(dentry, inode);
 331                 if (!rc)
 332                         crypt_stat->flags |= ECRYPTFS_METADATA_IN_XATTR;
 333         }
 334
 335         /* Must return 0 to allow non-eCryptfs files to be looked up, too */
 336         return 0;
 337 }
 338
 339 /**
 340  * ecryptfs_lookup_interpose - Dentry interposition for a lookup
 341  */
 342 static int ecryptfs_lookup_interpose(struct dentry *dentry,
 343                                      struct dentry *lower_dentry,
 344                                      struct inode *dir_inode)
 345 {
 346         struct inode *inode, *lower_inode = lower_dentry->d_inode;
 347         struct ecryptfs_dentry_info *dentry_info;
 348         struct vfsmount *lower_mnt;
 349         int rc = 0;
 350
 351         lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
 352         fsstack_copy_attr_atime(dir_inode, lower_dentry->d_parent->d_inode);
 353         BUG_ON(!lower_dentry->d_count);
 354
 355         dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
 356         ecryptfs_set_dentry_private(dentry, dentry_info);
 357         if (!dentry_info) {
 358                 printk(KERN_ERR "%s: Out of memory whilst attempting "
 359                        "to allocate ecryptfs_dentry_info struct\n",
 360                         __func__);
 361                 dput(lower_dentry);
 362                 mntput(lower_mnt);
 363                 d_drop(dentry);
 364                 return -ENOMEM;
 365         }
 366         ecryptfs_set_dentry_lower(dentry, lower_dentry);
 367         ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt);
 368
 369         if (!lower_dentry->d_inode) {
 370                 /* We want to add because we couldn't find in lower */
 371                 d_add(dentry, NULL);
 372                 return 0;
 373         }
 374         inode = __ecryptfs_get_inode(lower_inode, dir_inode->i_sb);
 375         if (IS_ERR(inode)) {
 376                 printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n",
 377                        __func__, PTR_ERR(inode));
 378                 return PTR_ERR(inode);
 379         }
 380         if (S_ISREG(inode->i_mode)) {
 381                 rc = ecryptfs_i_size_read(dentry, inode);
 382                 if (rc) {
 383                         make_bad_inode(inode);
 384                         return rc;
 385                 }
 386         }
 387
 388         if (inode->i_state & I_NEW)
 389                 unlock_new_inode(inode);
 390         d_add(dentry, inode);
 391
 392         return rc;
 393 }
 394
 395 /**
 396  * ecryptfs_lookup
 397  * @ecryptfs_dir_inode: The eCryptfs directory inode
 398  * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
 399  * @ecryptfs_nd: nameidata; may be NULL
 400  *
 401  * Find a file on disk. If the file does not exist, then we'll add it to the
 402  * dentry cache and continue on to read it from the disk.
 403  */
 404 static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
 405                                       struct dentry *ecryptfs_dentry,
 406                                       struct nameidata *ecryptfs_nd)
 407 {
 408         char *encrypted_and_encoded_name = NULL;
 409         size_t encrypted_and_encoded_name_size;
 410         struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
 411         struct dentry *lower_dir_dentry, *lower_dentry;
 412         int rc = 0;
 413
 414         if ((ecryptfs_dentry->d_name.len == 1
 415              && !strcmp(ecryptfs_dentry->d_name.name, "."))
 416             || (ecryptfs_dentry->d_name.len == 2
 417                 && !strcmp(ecryptfs_dentry->d_name.name, ".."))) {
 418                 goto out_d_drop;
 419         }
 420         lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
 421         mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
 422         lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name,
 423                                       lower_dir_dentry,
 424                                       ecryptfs_dentry->d_name.len);
 425         mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
 426         if (IS_ERR(lower_dentry)) {
 427                 rc = PTR_ERR(lower_dentry);
 428                 ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
 429                                 "[%d] on lower_dentry = [%s]\n", __func__, rc,
 430                                 encrypted_and_encoded_name);
 431                 goto out_d_drop;
 432         }
 433         if (lower_dentry->d_inode)
 434                 goto interpose;
 435         mount_crypt_stat = &ecryptfs_superblock_to_private(
 436                                 ecryptfs_dentry->d_sb)->mount_crypt_stat;
 437         if (!(mount_crypt_stat
 438             && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
 439                 goto interpose;
 440         dput(lower_dentry);
 441         rc = ecryptfs_encrypt_and_encode_filename(
 442                 &encrypted_and_encoded_name, &encrypted_and_encoded_name_size,
 443                 NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name,
 444                 ecryptfs_dentry->d_name.len);
 445         if (rc) {
 446                 printk(KERN_ERR "%s: Error attempting to encrypt and encode "
 447                        "filename; rc = [%d]\n", __func__, rc);
 448                 goto out_d_drop;
 449         }
 450         mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
 451         lower_dentry = lookup_one_len(encrypted_and_encoded_name,
 452                                       lower_dir_dentry,
 453                                       encrypted_and_encoded_name_size);
 454         mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
 455         if (IS_ERR(lower_dentry)) {
 456                 rc = PTR_ERR(lower_dentry);
 457                 ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
 458                                 "[%d] on lower_dentry = [%s]\n", __func__, rc,
 459                                 encrypted_and_encoded_name);
 460                 goto out_d_drop;
 461         }
 462 interpose:
 463         rc = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry,
 464                                        ecryptfs_dir_inode);
 465         goto out;
 466 out_d_drop:
 467         d_drop(ecryptfs_dentry);
 468 out:
 469         kfree(encrypted_and_encoded_name);
 470         return ERR_PTR(rc);
 471 }
 472
 473 static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,
 474                          struct dentry *new_dentry)
 475 {
 476         struct dentry *lower_old_dentry;
 477         struct dentry *lower_new_dentry;
 478         struct dentry *lower_dir_dentry;
 479         u64 file_size_save;
 480         int rc;
 481
 482         file_size_save = i_size_read(old_dentry->d_inode);
 483         lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
 484         lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
 485         dget(lower_old_dentry);
 486         dget(lower_new_dentry);
 487         lower_dir_dentry = lock_parent(lower_new_dentry);
 488         rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
 489                       lower_new_dentry);
 490         if (rc || !lower_new_dentry->d_inode)
 491                 goto out_lock;
 492         rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb);
 493         if (rc)
 494                 goto out_lock;
 495         fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
 496         fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
 497         set_nlink(old_dentry->d_inode,
 498                   ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink);
 499         i_size_write(new_dentry->d_inode, file_size_save);
 500 out_lock:
 501         unlock_dir(lower_dir_dentry);
 502         dput(lower_new_dentry);
 503         dput(lower_old_dentry);
 504         return rc;
 505 }
 506
 507 static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)
 508 {
 509         return ecryptfs_do_unlink(dir, dentry, dentry->d_inode);
 510 }
 511
 512 static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
 513                             const char *symname)
 514 {
 515         int rc;
 516         struct dentry *lower_dentry;
 517         struct dentry *lower_dir_dentry;
 518         char *encoded_symname;
 519         size_t encoded_symlen;
 520         struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
 521
 522         lower_dentry = ecryptfs_dentry_to_lower(dentry);
 523         dget(lower_dentry);
 524         lower_dir_dentry = lock_parent(lower_dentry);
 525         mount_crypt_stat = &ecryptfs_superblock_to_private(
 526                 dir->i_sb)->mount_crypt_stat;
 527         rc = ecryptfs_encrypt_and_encode_filename(&encoded_symname,
 528                                                   &encoded_symlen,
 529                                                   NULL,
 530                                                   mount_crypt_stat, symname,
 531                                                   strlen(symname));
 532         if (rc)
 533                 goto out_lock;
 534         rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
 535                          encoded_symname);
 536         kfree(encoded_symname);
 537         if (rc || !lower_dentry->d_inode)
 538                 goto out_lock;
 539         rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
 540         if (rc)
 541                 goto out_lock;
 542         fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
 543         fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
 544 out_lock:
 545         unlock_dir(lower_dir_dentry);
 546         dput(lower_dentry);
 547         if (!dentry->d_inode)
 548                 d_drop(dentry);
 549         return rc;
 550 }
 551
 552 static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 553 {
 554         int rc;
 555         struct dentry *lower_dentry;
 556         struct dentry *lower_dir_dentry;
 557
 558         lower_dentry = ecryptfs_dentry_to_lower(dentry);
 559         lower_dir_dentry = lock_parent(lower_dentry);
 560         rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode);
 561         if (rc || !lower_dentry->d_inode)
 562                 goto out;
 563         rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
 564         if (rc)
 565                 goto out;
 566         fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
 567         fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
 568         set_nlink(dir, lower_dir_dentry->d_inode->i_nlink);
 569 out:
 570         unlock_dir(lower_dir_dentry);
 571         if (!dentry->d_inode)
 572                 d_drop(dentry);
 573         return rc;
 574 }
 575
 576 static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)
 577 {
 578         struct dentry *lower_dentry;
 579         struct dentry *lower_dir_dentry;
 580         int rc;
 581
 582         lower_dentry = ecryptfs_dentry_to_lower(dentry);
 583         dget(dentry);
 584         lower_dir_dentry = lock_parent(lower_dentry);
 585         dget(lower_dentry);
 586         rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry);
 587         dput(lower_dentry);
 588         if (!rc && dentry->d_inode)
 589                 clear_nlink(dentry->d_inode);
 590         fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
 591         set_nlink(dir, lower_dir_dentry->d_inode->i_nlink);
 592         unlock_dir(lower_dir_dentry);
 593         if (!rc)
 594                 d_drop(dentry);
 595         dput(dentry);
 596         return rc;
 597 }
 598
 599 static int
 600 ecryptfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
 601 {
 602         int rc;
 603         struct dentry *lower_dentry;
 604         struct dentry *lower_dir_dentry;
 605
 606         lower_dentry = ecryptfs_dentry_to_lower(dentry);
 607         lower_dir_dentry = lock_parent(lower_dentry);
 608         rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev);
 609         if (rc || !lower_dentry->d_inode)
 610                 goto out;
 611         rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
 612         if (rc)
 613                 goto out;
 614         fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
 615         fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
 616 out:
 617         unlock_dir(lower_dir_dentry);
 618         if (!dentry->d_inode)
 619                 d_drop(dentry);
 620         return rc;
 621 }
 622
 623 static int
 624 ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 625                 struct inode *new_dir, struct dentry *new_dentry)
 626 {
 627         int rc;
 628         struct dentry *lower_old_dentry;
 629         struct dentry *lower_new_dentry;
 630         struct dentry *lower_old_dir_dentry;
 631         struct dentry *lower_new_dir_dentry;
 632         struct dentry *trap = NULL;
 633
 634         lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
 635         lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
 636         dget(lower_old_dentry);
 637         dget(lower_new_dentry);
 638         lower_old_dir_dentry = dget_parent(lower_old_dentry);
 639         lower_new_dir_dentry = dget_parent(lower_new_dentry);
 640         trap = lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
 641         /* source should not be ancestor of target */
 642         if (trap == lower_old_dentry) {
 643                 rc = -EINVAL;
 644                 goto out_lock;
 645         }
 646         /* target should not be ancestor of source */
 647         if (trap == lower_new_dentry) {
 648                 rc = -ENOTEMPTY;
 649                 goto out_lock;
 650         }
 651         rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry,
 652                         lower_new_dir_dentry->d_inode, lower_new_dentry);
 653         if (rc)
 654                 goto out_lock;
 655         fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode);
 656         if (new_dir != old_dir)
 657                 fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode);
 658 out_lock:
 659         unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
 660         dput(lower_new_dir_dentry);
 661         dput(lower_old_dir_dentry);
 662         dput(lower_new_dentry);
 663         dput(lower_old_dentry);
 664         return rc;
 665 }
 666
 667 static int ecryptfs_readlink_lower(struct dentry *dentry, char **buf,
 668                                    size_t *bufsiz)
 669 {
 670         struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
 671         char *lower_buf;
 672         mm_segment_t old_fs;
 673         int rc;
 674
 675         lower_buf = kmalloc(PATH_MAX, GFP_KERNEL);
 676         if (!lower_buf) {
 677                 rc = -ENOMEM;
 678                 goto out;
 679         }
 680         old_fs = get_fs();
 681         set_fs(get_ds());
 682         rc = lower_dentry->d_inode->i_op->readlink(lower_dentry,
 683                                                    (char __user *)lower_buf,
 684                                                    PATH_MAX);
 685         set_fs(old_fs);
 686         if (rc < 0)
 687                 goto out;
 688         rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry,
 689                                                   lower_buf, rc);
 690 out:
 691         kfree(lower_buf);
 692         return rc;
 693 }
 694
 695 static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 696 {
 697         char *buf;
 698         size_t len = PATH_MAX;
 699         int rc;
 700
 701         rc = ecryptfs_readlink_lower(dentry, &buf, &len);
 702         if (rc)
 703                 goto out;
 704         fsstack_copy_attr_atime(dentry->d_inode,
 705                                 ecryptfs_dentry_to_lower(dentry)->d_inode);
 706         buf[len] = '\0';
 707 out:
 708         nd_set_link(nd, buf);
 709         return NULL;
 710 }
 711
 712 static void
 713 ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
 714 {
 715         char *buf = nd_get_link(nd);
 716         if (!IS_ERR(buf)) {
 717                 /* Free the char* */
 718                 kfree(buf);
 719         }
 720 }
 721
 722 /**
 723  * upper_size_to_lower_size
 724  * @crypt_stat: Crypt_stat associated with file
 725  * @upper_size: Size of the upper file
 726  *
 727  * Calculate the required size of the lower file based on the
 728  * specified size of the upper file. This calculation is based on the
 729  * number of headers in the underlying file and the extent size.
 730  *
 731  * Returns Calculated size of the lower file.
 732  */
 733 static loff_t
 734 upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat,
 735                          loff_t upper_size)
 736 {
 737         loff_t lower_size;
 738
 739         lower_size = ecryptfs_lower_header_size(crypt_stat);
 740         if (upper_size != 0) {
 741                 loff_t num_extents;
 742
 743                 num_extents = upper_size >> crypt_stat->extent_shift;
 744                 if (upper_size & ~crypt_stat->extent_mask)
 745                         num_extents++;
 746                 lower_size += (num_extents * crypt_stat->extent_size);
 747         }
 748         return lower_size;
 749 }
 750
 751 /**
 752  * truncate_upper
 753  * @dentry: The ecryptfs layer dentry
 754  * @ia: Address of the ecryptfs inode's attributes
 755  * @lower_ia: Address of the lower inode's attributes
 756  *
 757  * Function to handle truncations modifying the size of the file. Note
 758  * that the file sizes are interpolated. When expanding, we are simply
 759  * writing strings of 0's out. When truncating, we truncate the upper
 760  * inode and update the lower_ia according to the page index
 761  * interpolations. If ATTR_SIZE is set in lower_ia->ia_valid upon return,
 762  * the caller must use lower_ia in a call to notify_change() to perform
 763  * the truncation of the lower inode.
 764  *
 765  * Returns zero on success; non-zero otherwise
 766  */
 767 static int truncate_upper(struct dentry *dentry, struct iattr *ia,
 768                           struct iattr *lower_ia)
 769 {
 770         int rc = 0;
 771         struct inode *inode = dentry->d_inode;
 772         struct ecryptfs_crypt_stat *crypt_stat;
 773         loff_t i_size = i_size_read(inode);
 774         loff_t lower_size_before_truncate;
 775         loff_t lower_size_after_truncate;
 776
 777         if (unlikely((ia->ia_size == i_size))) {
 778                 lower_ia->ia_valid &= ~ATTR_SIZE;
 779                 return 0;
 780         }
 781         rc = ecryptfs_get_lower_file(dentry, inode);
 782         if (rc)
 783                 return rc;
 784         crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
 785         /* Switch on growing or shrinking file */
 786         if (ia->ia_size > i_size) {
 787                 char zero[] = { 0x00 };
 788
 789                 lower_ia->ia_valid &= ~ATTR_SIZE;
 790                 /* Write a single 0 at the last position of the file;
 791                  * this triggers code that will fill in 0's throughout
 792                  * the intermediate portion of the previous end of the
 793                  * file and the new and of the file */
 794                 rc = ecryptfs_write(inode, zero,
 795                                     (ia->ia_size - 1), 1);
 796         } else { /* ia->ia_size < i_size_read(inode) */
 797                 /* We're chopping off all the pages down to the page
 798                  * in which ia->ia_size is located. Fill in the end of
 799                  * that page from (ia->ia_size & ~PAGE_CACHE_MASK) to
 800                  * PAGE_CACHE_SIZE with zeros. */
 801                 size_t num_zeros = (PAGE_CACHE_SIZE
 802                                     - (ia->ia_size & ~PAGE_CACHE_MASK));
 803
 804                 if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
 805                         truncate_setsize(inode, ia->ia_size);
 806                         lower_ia->ia_size = ia->ia_size;
 807                         lower_ia->ia_valid |= ATTR_SIZE;
 808                         goto out;
 809                 }
 810                 if (num_zeros) {
 811                         char *zeros_virt;
 812
 813                         zeros_virt = kzalloc(num_zeros, GFP_KERNEL);
 814                         if (!zeros_virt) {
 815                                 rc = -ENOMEM;
 816                                 goto out;
 817                         }
 818                         rc = ecryptfs_write(inode, zeros_virt,
 819                                             ia->ia_size, num_zeros);
 820                         kfree(zeros_virt);
 821                         if (rc) {
 822                                 printk(KERN_ERR "Error attempting to zero out "
 823                                        "the remainder of the end page on "
 824                                        "reducing truncate; rc = [%d]\n", rc);
 825                                 goto out;
 826                         }
 827                 }
 828                 truncate_setsize(inode, ia->ia_size);
 829                 rc = ecryptfs_write_inode_size_to_metadata(inode);
 830                 if (rc) {
 831                         printk(KERN_ERR "Problem with "
 832                                "ecryptfs_write_inode_size_to_metadata; "
 833                                "rc = [%d]\n", rc);
 834                         goto out;
 835                 }
 836                 /* We are reducing the size of the ecryptfs file, and need to
 837                  * know if we need to reduce the size of the lower file. */
 838                 lower_size_before_truncate =
 839                     upper_size_to_lower_size(crypt_stat, i_size);
 840                 lower_size_after_truncate =
 841                     upper_size_to_lower_size(crypt_stat, ia->ia_size);
 842                 if (lower_size_after_truncate < lower_size_before_truncate) {
 843                         lower_ia->ia_size = lower_size_after_truncate;
 844                         lower_ia->ia_valid |= ATTR_SIZE;
 845                 } else
 846                         lower_ia->ia_valid &= ~ATTR_SIZE;
 847         }
 848 out:
 849         ecryptfs_put_lower_file(inode);
 850         return rc;
 851 }
 852
 853 static int ecryptfs_inode_newsize_ok(struct inode *inode, loff_t offset)
 854 {
 855         struct ecryptfs_crypt_stat *crypt_stat;
 856         loff_t lower_oldsize, lower_newsize;
 857
 858         crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
 859         lower_oldsize = upper_size_to_lower_size(crypt_stat,
 860                                                  i_size_read(inode));
 861         lower_newsize = upper_size_to_lower_size(crypt_stat, offset);
 862         if (lower_newsize > lower_oldsize) {
 863                 /*
 864                  * The eCryptfs inode and the new *lower* size are mixed here
 865                  * because we may not have the lower i_mutex held and/or it may
 866                  * not be appropriate to call inode_newsize_ok() with inodes
 867                  * from other filesystems.
 868                  */
 869                 return inode_newsize_ok(inode, lower_newsize);
 870         }
 871
 872         return 0;
 873 }
 874
 875 /**
 876  * ecryptfs_truncate
 877  * @dentry: The ecryptfs layer dentry
 878  * @new_length: The length to expand the file to
 879  *
 880  * Simple function that handles the truncation of an eCryptfs inode and
 881  * its corresponding lower inode.
 882  *
 883  * Returns zero on success; non-zero otherwise
 884  */
 885 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
 886 {
 887         struct iattr ia = { .ia_valid = ATTR_SIZE, .ia_size = new_length };
 888         struct iattr lower_ia = { .ia_valid = 0 };
 889         int rc;
 890
 891         rc = ecryptfs_inode_newsize_ok(dentry->d_inode, new_length);
 892         if (rc)
 893                 return rc;
 894
 895         rc = truncate_upper(dentry, &ia, &lower_ia);
 896         if (!rc && lower_ia.ia_valid & ATTR_SIZE) {
 897                 struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
 898
 899                 mutex_lock(&lower_dentry->d_inode->i_mutex);
 900                 rc = notify_change(lower_dentry, &lower_ia);
 901                 mutex_unlock(&lower_dentry->d_inode->i_mutex);
 902         }
 903         return rc;
 904 }
 905
 906 static int
 907 ecryptfs_permission(struct inode *inode, int mask)
 908 {
 909         return inode_permission(ecryptfs_inode_to_lower(inode), mask);
 910 }
 911
 912 /**
 913  * ecryptfs_setattr
 914  * @dentry: dentry handle to the inode to modify
 915  * @ia: Structure with flags of what to change and values
 916  *
 917  * Updates the metadata of an inode. If the update is to the size
 918  * i.e. truncation, then ecryptfs_truncate will handle the size modification
 919  * of both the ecryptfs inode and the lower inode.
 920  *
 921  * All other metadata changes will be passed right to the lower filesystem,
 922  * and we will just update our inode to look like the lower.
 923  */
 924 static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 925 {
 926         int rc = 0;
 927         struct dentry *lower_dentry;
 928         struct iattr lower_ia;
 929         struct inode *inode;
 930         struct inode *lower_inode;
 931         struct ecryptfs_crypt_stat *crypt_stat;
 932
 933         crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
 934         if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED))
 935                 ecryptfs_init_crypt_stat(crypt_stat);
 936         inode = dentry->d_inode;
 937         lower_inode = ecryptfs_inode_to_lower(inode);
 938         lower_dentry = ecryptfs_dentry_to_lower(dentry);
 939         mutex_lock(&crypt_stat->cs_mutex);
 940         if (S_ISDIR(dentry->d_inode->i_mode))
 941                 crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
 942         else if (S_ISREG(dentry->d_inode->i_mode)
 943                  && (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)
 944                      || !(crypt_stat->flags & ECRYPTFS_KEY_VALID))) {
 945                 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
 946
 947                 mount_crypt_stat = &ecryptfs_superblock_to_private(
 948                         dentry->d_sb)->mount_crypt_stat;
 949                 rc = ecryptfs_get_lower_file(dentry, inode);
 950                 if (rc) {
 951                         mutex_unlock(&crypt_stat->cs_mutex);
 952                         goto out;
 953                 }
 954                 rc = ecryptfs_read_metadata(dentry);
 955                 ecryptfs_put_lower_file(inode);
 956                 if (rc) {
 957                         if (!(mount_crypt_stat->flags
 958                               & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) {
 959                                 rc = -EIO;
 960                                 printk(KERN_WARNING "Either the lower file "
 961                                        "is not in a valid eCryptfs format, "
 962                                        "or the key could not be retrieved. "
 963                                        "Plaintext passthrough mode is not "
 964                                        "enabled; returning -EIO\n");
 965                                 mutex_unlock(&crypt_stat->cs_mutex);
 966                                 goto out;
 967                         }
 968                         rc = 0;
 969                         crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED
 970                                                | ECRYPTFS_ENCRYPTED);
 971                 }
 972         }
 973         mutex_unlock(&crypt_stat->cs_mutex);
 974
 975         rc = inode_change_ok(inode, ia);
 976         if (rc)
 977                 goto out;
 978         if (ia->ia_valid & ATTR_SIZE) {
 979                 rc = ecryptfs_inode_newsize_ok(inode, ia->ia_size);
 980                 if (rc)
 981                         goto out;
 982         }
 983
 984         memcpy(&lower_ia, ia, sizeof(lower_ia));
 985         if (ia->ia_valid & ATTR_FILE)
 986                 lower_ia.ia_file = ecryptfs_file_to_lower(ia->ia_file);
 987         if (ia->ia_valid & ATTR_SIZE) {
 988                 rc = truncate_upper(dentry, ia, &lower_ia);
 989                 if (rc < 0)
 990                         goto out;
 991         }
 992
 993         /*
 994          * mode change is for clearing setuid/setgid bits. Allow lower fs
 995          * to interpret this in its own way.
 996          */
 997         if (lower_ia.ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
 998                 lower_ia.ia_valid &= ~ATTR_MODE;
 999
1000         mutex_lock(&lower_dentry->d_inode->i_mutex);
1001         rc = notify_change(lower_dentry, &lower_ia);
1002         mutex_unlock(&lower_dentry->d_inode->i_mutex);
1003 out:
1004         fsstack_copy_attr_all(inode, lower_inode);
1005         return rc;
1006 }
1007
1008 int ecryptfs_getattr_link(struct vfsmount *mnt, struct dentry *dentry,
1009                           struct kstat *stat)
1010 {
1011         struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
1012         int rc = 0;
1013
1014         mount_crypt_stat = &ecryptfs_superblock_to_private(
1015                                                 dentry->d_sb)->mount_crypt_stat;
1016         generic_fillattr(dentry->d_inode, stat);
1017         if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) {
1018                 char *target;
1019                 size_t targetsiz;
1020
1021                 rc = ecryptfs_readlink_lower(dentry, &target, &targetsiz);
1022                 if (!rc) {
1023                         kfree(target);
1024                         stat->size = targetsiz;
1025                 }
1026         }
1027         return rc;
1028 }
1029
1030 int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1031                      struct kstat *stat)
1032 {
1033         struct kstat lower_stat;
1034         int rc;
1035
1036         rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),
1037                          ecryptfs_dentry_to_lower(dentry), &lower_stat);
1038         if (!rc) {
1039                 fsstack_copy_attr_all(dentry->d_inode,
1040                                       ecryptfs_inode_to_lower(dentry->d_inode));
1041                 generic_fillattr(dentry->d_inode, stat);
1042                 stat->blocks = lower_stat.blocks;
1043         }
1044         return rc;
1045 }
1046
1047 int
1048 ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
1049                   size_t size, int flags)
1050 {
1051         int rc = 0;
1052         struct dentry *lower_dentry;
1053
1054         lower_dentry = ecryptfs_dentry_to_lower(dentry);
1055         if (!lower_dentry->d_inode->i_op->setxattr) {
1056                 rc = -EOPNOTSUPP;
1057                 goto out;
1058         }
1059
1060         rc = vfs_setxattr(lower_dentry, name, value, size, flags);
1061         if (!rc)
1062                 fsstack_copy_attr_all(dentry->d_inode, lower_dentry->d_inode);
1063 out:
1064         return rc;
1065 }
1066
1067 ssize_t
1068 ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
1069                         void *value, size_t size)
1070 {
1071         int rc = 0;
1072
1073         if (!lower_dentry->d_inode->i_op->getxattr) {
1074                 rc = -EOPNOTSUPP;
1075                 goto out;
1076         }
1077         mutex_lock(&lower_dentry->d_inode->i_mutex);
1078         rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value,
1079                                                    size);
1080         mutex_unlock(&lower_dentry->d_inode->i_mutex);
1081 out:
1082         return rc;
1083 }
1084
1085 static ssize_t
1086 ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value,
1087                   size_t size)
1088 {
1089         return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name,
1090                                        value, size);
1091 }
1092
1093 static ssize_t
1094 ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size)
1095 {
1096         int rc = 0;
1097         struct dentry *lower_dentry;
1098
1099         lower_dentry = ecryptfs_dentry_to_lower(dentry);
1100         if (!lower_dentry->d_inode->i_op->listxattr) {
1101                 rc = -EOPNOTSUPP;
1102                 goto out;
1103         }
1104         mutex_lock(&lower_dentry->d_inode->i_mutex);
1105         rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size);
1106         mutex_unlock(&lower_dentry->d_inode->i_mutex);
1107 out:
1108         return rc;
1109 }
1110
1111 static int ecryptfs_removexattr(struct dentry *dentry, const char *name)
1112 {
1113         int rc = 0;
1114         struct dentry *lower_dentry;
1115
1116         lower_dentry = ecryptfs_dentry_to_lower(dentry);
1117         if (!lower_dentry->d_inode->i_op->removexattr) {
1118                 rc = -EOPNOTSUPP;
1119                 goto out;
1120         }
1121         mutex_lock(&lower_dentry->d_inode->i_mutex);
1122         rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name);
1123         mutex_unlock(&lower_dentry->d_inode->i_mutex);
1124 out:
1125         return rc;
1126 }
1127
1128 const struct inode_operations ecryptfs_symlink_iops = {
1129         .readlink = generic_readlink,
1130         .follow_link = ecryptfs_follow_link,
1131         .put_link = ecryptfs_put_link,
1132         .permission = ecryptfs_permission,
1133         .setattr = ecryptfs_setattr,
1134         .getattr = ecryptfs_getattr_link,
1135         .setxattr = ecryptfs_setxattr,
1136         .getxattr = ecryptfs_getxattr,
1137         .listxattr = ecryptfs_listxattr,
1138         .removexattr = ecryptfs_removexattr
1139 };
1140
1141 const struct inode_operations ecryptfs_dir_iops = {
1142         .create = ecryptfs_create,
1143         .lookup = ecryptfs_lookup,
1144         .link = ecryptfs_link,
1145         .unlink = ecryptfs_unlink,
1146         .symlink = ecryptfs_symlink,
1147         .mkdir = ecryptfs_mkdir,
1148         .rmdir = ecryptfs_rmdir,
1149         .mknod = ecryptfs_mknod,
1150         .rename = ecryptfs_rename,
1151         .permission = ecryptfs_permission,
1152         .setattr = ecryptfs_setattr,
1153         .setxattr = ecryptfs_setxattr,
1154         .getxattr = ecryptfs_getxattr,
1155         .listxattr = ecryptfs_listxattr,
1156         .removexattr = ecryptfs_removexattr
1157 };
1158
1159 const struct inode_operations ecryptfs_main_iops = {
1160         .permission = ecryptfs_permission,
1161         .setattr = ecryptfs_setattr,
1162         .getattr = ecryptfs_getattr,
1163         .setxattr = ecryptfs_setxattr,
1164         .getxattr = ecryptfs_getxattr,
1165         .listxattr = ecryptfs_listxattr,
1166         .removexattr = ecryptfs_removexattr
1167 };