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 6237fead6SMichael Halcrow * Copyright (C) 2004-2006 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> 33237fead6SMichael Halcrow #include "ecryptfs_kernel.h" 34237fead6SMichael Halcrow 35237fead6SMichael Halcrow static struct dentry *lock_parent(struct dentry *dentry) 36237fead6SMichael Halcrow { 37237fead6SMichael Halcrow struct dentry *dir; 38237fead6SMichael Halcrow 39237fead6SMichael Halcrow dir = dget(dentry->d_parent); 40237fead6SMichael Halcrow mutex_lock(&(dir->d_inode->i_mutex)); 41237fead6SMichael Halcrow return dir; 42237fead6SMichael Halcrow } 43237fead6SMichael Halcrow 44237fead6SMichael Halcrow static void unlock_parent(struct dentry *dentry) 45237fead6SMichael Halcrow { 46237fead6SMichael Halcrow mutex_unlock(&(dentry->d_parent->d_inode->i_mutex)); 47237fead6SMichael Halcrow dput(dentry->d_parent); 48237fead6SMichael Halcrow } 49237fead6SMichael Halcrow 50237fead6SMichael Halcrow static void unlock_dir(struct dentry *dir) 51237fead6SMichael Halcrow { 52237fead6SMichael Halcrow mutex_unlock(&dir->d_inode->i_mutex); 53237fead6SMichael Halcrow dput(dir); 54237fead6SMichael Halcrow } 55237fead6SMichael Halcrow 56237fead6SMichael Halcrow void ecryptfs_copy_inode_size(struct inode *dst, const struct inode *src) 57237fead6SMichael Halcrow { 58237fead6SMichael Halcrow i_size_write(dst, i_size_read((struct inode *)src)); 59237fead6SMichael Halcrow dst->i_blocks = src->i_blocks; 60237fead6SMichael Halcrow } 61237fead6SMichael Halcrow 62237fead6SMichael Halcrow void ecryptfs_copy_attr_atime(struct inode *dest, const struct inode *src) 63237fead6SMichael Halcrow { 64237fead6SMichael Halcrow dest->i_atime = src->i_atime; 65237fead6SMichael Halcrow } 66237fead6SMichael Halcrow 67237fead6SMichael Halcrow static void ecryptfs_copy_attr_times(struct inode *dest, 68237fead6SMichael Halcrow const struct inode *src) 69237fead6SMichael Halcrow { 70237fead6SMichael Halcrow dest->i_atime = src->i_atime; 71237fead6SMichael Halcrow dest->i_mtime = src->i_mtime; 72237fead6SMichael Halcrow dest->i_ctime = src->i_ctime; 73237fead6SMichael Halcrow } 74237fead6SMichael Halcrow 75237fead6SMichael Halcrow static void ecryptfs_copy_attr_timesizes(struct inode *dest, 76237fead6SMichael Halcrow const struct inode *src) 77237fead6SMichael Halcrow { 78237fead6SMichael Halcrow dest->i_atime = src->i_atime; 79237fead6SMichael Halcrow dest->i_mtime = src->i_mtime; 80237fead6SMichael Halcrow dest->i_ctime = src->i_ctime; 81237fead6SMichael Halcrow ecryptfs_copy_inode_size(dest, src); 82237fead6SMichael Halcrow } 83237fead6SMichael Halcrow 84237fead6SMichael Halcrow void ecryptfs_copy_attr_all(struct inode *dest, const struct inode *src) 85237fead6SMichael Halcrow { 86237fead6SMichael Halcrow dest->i_mode = src->i_mode; 87237fead6SMichael Halcrow dest->i_nlink = src->i_nlink; 88237fead6SMichael Halcrow dest->i_uid = src->i_uid; 89237fead6SMichael Halcrow dest->i_gid = src->i_gid; 90237fead6SMichael Halcrow dest->i_rdev = src->i_rdev; 91237fead6SMichael Halcrow dest->i_atime = src->i_atime; 92237fead6SMichael Halcrow dest->i_mtime = src->i_mtime; 93237fead6SMichael Halcrow dest->i_ctime = src->i_ctime; 94237fead6SMichael Halcrow dest->i_blkbits = src->i_blkbits; 95237fead6SMichael Halcrow dest->i_flags = src->i_flags; 96237fead6SMichael Halcrow } 97237fead6SMichael Halcrow 98237fead6SMichael Halcrow /** 99237fead6SMichael Halcrow * ecryptfs_create_underlying_file 100237fead6SMichael Halcrow * @lower_dir_inode: inode of the parent in the lower fs of the new file 101237fead6SMichael Halcrow * @lower_dentry: New file's dentry in the lower fs 102237fead6SMichael Halcrow * @ecryptfs_dentry: New file's dentry in ecryptfs 103237fead6SMichael Halcrow * @mode: The mode of the new file 104237fead6SMichael Halcrow * @nd: nameidata of ecryptfs' parent's dentry & vfsmount 105237fead6SMichael Halcrow * 106237fead6SMichael Halcrow * Creates the file in the lower file system. 107237fead6SMichael Halcrow * 108237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 109237fead6SMichael Halcrow */ 110237fead6SMichael Halcrow static int 111237fead6SMichael Halcrow ecryptfs_create_underlying_file(struct inode *lower_dir_inode, 112237fead6SMichael Halcrow struct dentry *dentry, int mode, 113237fead6SMichael Halcrow struct nameidata *nd) 114237fead6SMichael Halcrow { 115237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 116237fead6SMichael Halcrow struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); 117237fead6SMichael Halcrow struct dentry *dentry_save; 118237fead6SMichael Halcrow struct vfsmount *vfsmount_save; 119237fead6SMichael Halcrow int rc; 120237fead6SMichael Halcrow 121237fead6SMichael Halcrow dentry_save = nd->dentry; 122237fead6SMichael Halcrow vfsmount_save = nd->mnt; 123237fead6SMichael Halcrow nd->dentry = lower_dentry; 124237fead6SMichael Halcrow nd->mnt = lower_mnt; 125237fead6SMichael Halcrow rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); 126237fead6SMichael Halcrow nd->dentry = dentry_save; 127237fead6SMichael Halcrow nd->mnt = vfsmount_save; 128237fead6SMichael Halcrow return rc; 129237fead6SMichael Halcrow } 130237fead6SMichael Halcrow 131237fead6SMichael Halcrow /** 132237fead6SMichael Halcrow * ecryptfs_do_create 133237fead6SMichael Halcrow * @directory_inode: inode of the new file's dentry's parent in ecryptfs 134237fead6SMichael Halcrow * @ecryptfs_dentry: New file's dentry in ecryptfs 135237fead6SMichael Halcrow * @mode: The mode of the new file 136237fead6SMichael Halcrow * @nd: nameidata of ecryptfs' parent's dentry & vfsmount 137237fead6SMichael Halcrow * 138237fead6SMichael Halcrow * Creates the underlying file and the eCryptfs inode which will link to 139237fead6SMichael Halcrow * it. It will also update the eCryptfs directory inode to mimic the 140237fead6SMichael Halcrow * stat of the lower directory inode. 141237fead6SMichael Halcrow * 142237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 143237fead6SMichael Halcrow */ 144237fead6SMichael Halcrow static int 145237fead6SMichael Halcrow ecryptfs_do_create(struct inode *directory_inode, 146237fead6SMichael Halcrow struct dentry *ecryptfs_dentry, int mode, 147237fead6SMichael Halcrow struct nameidata *nd) 148237fead6SMichael Halcrow { 149237fead6SMichael Halcrow int rc; 150237fead6SMichael Halcrow struct dentry *lower_dentry; 151237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 152237fead6SMichael Halcrow 153237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); 154237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 155237fead6SMichael Halcrow if (unlikely(IS_ERR(lower_dir_dentry))) { 156237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error locking directory of " 157237fead6SMichael Halcrow "dentry\n"); 158237fead6SMichael Halcrow rc = PTR_ERR(lower_dir_dentry); 159237fead6SMichael Halcrow goto out; 160237fead6SMichael Halcrow } 161237fead6SMichael Halcrow rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode, 162237fead6SMichael Halcrow ecryptfs_dentry, mode, nd); 163237fead6SMichael Halcrow if (unlikely(rc)) { 164237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 165237fead6SMichael Halcrow "Failure to create underlying file\n"); 166237fead6SMichael Halcrow goto out_lock; 167237fead6SMichael Halcrow } 168237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, ecryptfs_dentry, 169237fead6SMichael Halcrow directory_inode->i_sb, 0); 170237fead6SMichael Halcrow if (rc) { 171237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Failure in ecryptfs_interpose\n"); 172237fead6SMichael Halcrow goto out_lock; 173237fead6SMichael Halcrow } 174237fead6SMichael Halcrow ecryptfs_copy_attr_timesizes(directory_inode, 175237fead6SMichael Halcrow lower_dir_dentry->d_inode); 176237fead6SMichael Halcrow out_lock: 177237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 178237fead6SMichael Halcrow out: 179237fead6SMichael Halcrow return rc; 180237fead6SMichael Halcrow } 181237fead6SMichael Halcrow 182237fead6SMichael Halcrow /** 183237fead6SMichael Halcrow * grow_file 184237fead6SMichael Halcrow * @ecryptfs_dentry: the ecryptfs dentry 185237fead6SMichael Halcrow * @lower_file: The lower file 186237fead6SMichael Halcrow * @inode: The ecryptfs inode 187237fead6SMichael Halcrow * @lower_inode: The lower inode 188237fead6SMichael Halcrow * 189237fead6SMichael Halcrow * This is the code which will grow the file to its correct size. 190237fead6SMichael Halcrow */ 191237fead6SMichael Halcrow static int grow_file(struct dentry *ecryptfs_dentry, struct file *lower_file, 192237fead6SMichael Halcrow struct inode *inode, struct inode *lower_inode) 193237fead6SMichael Halcrow { 194237fead6SMichael Halcrow int rc = 0; 195237fead6SMichael Halcrow struct file fake_file; 196237fead6SMichael Halcrow struct ecryptfs_file_info tmp_file_info; 197237fead6SMichael Halcrow 198237fead6SMichael Halcrow memset(&fake_file, 0, sizeof(fake_file)); 199237fead6SMichael Halcrow fake_file.f_dentry = ecryptfs_dentry; 200237fead6SMichael Halcrow memset(&tmp_file_info, 0, sizeof(tmp_file_info)); 201237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_file, &tmp_file_info); 202237fead6SMichael Halcrow ecryptfs_set_file_lower(&fake_file, lower_file); 203237fead6SMichael Halcrow rc = ecryptfs_fill_zeros(&fake_file, 1); 204237fead6SMichael Halcrow if (rc) { 205237fead6SMichael Halcrow ECRYPTFS_SET_FLAG( 206237fead6SMichael Halcrow ecryptfs_inode_to_private(inode)->crypt_stat.flags, 207237fead6SMichael Halcrow ECRYPTFS_SECURITY_WARNING); 208237fead6SMichael Halcrow ecryptfs_printk(KERN_WARNING, "Error attempting to fill zeros " 209237fead6SMichael Halcrow "in file; rc = [%d]\n", rc); 210237fead6SMichael Halcrow goto out; 211237fead6SMichael Halcrow } 212237fead6SMichael Halcrow i_size_write(inode, 0); 213237fead6SMichael Halcrow ecryptfs_write_inode_size_to_header(lower_file, lower_inode, inode); 214237fead6SMichael Halcrow ECRYPTFS_SET_FLAG(ecryptfs_inode_to_private(inode)->crypt_stat.flags, 215237fead6SMichael Halcrow ECRYPTFS_NEW_FILE); 216237fead6SMichael Halcrow out: 217237fead6SMichael Halcrow return rc; 218237fead6SMichael Halcrow } 219237fead6SMichael Halcrow 220237fead6SMichael Halcrow /** 221237fead6SMichael Halcrow * ecryptfs_initialize_file 222237fead6SMichael Halcrow * 223237fead6SMichael Halcrow * Cause the file to be changed from a basic empty file to an ecryptfs 224237fead6SMichael Halcrow * file with a header and first data page. 225237fead6SMichael Halcrow * 226237fead6SMichael Halcrow * Returns zero on success 227237fead6SMichael Halcrow */ 228237fead6SMichael Halcrow static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry) 229237fead6SMichael Halcrow { 230237fead6SMichael Halcrow int rc = 0; 231237fead6SMichael Halcrow int lower_flags; 232237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 233237fead6SMichael Halcrow struct dentry *lower_dentry; 234237fead6SMichael Halcrow struct dentry *tlower_dentry = NULL; 235237fead6SMichael Halcrow struct file *lower_file; 236237fead6SMichael Halcrow struct inode *inode, *lower_inode; 237237fead6SMichael Halcrow struct vfsmount *lower_mnt; 238237fead6SMichael Halcrow 239237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); 240237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "lower_dentry->d_name.name = [%s]\n", 241237fead6SMichael Halcrow lower_dentry->d_name.name); 242237fead6SMichael Halcrow inode = ecryptfs_dentry->d_inode; 243237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; 244237fead6SMichael Halcrow tlower_dentry = dget(lower_dentry); 245237fead6SMichael Halcrow if (!tlower_dentry) { 246237fead6SMichael Halcrow rc = -ENOMEM; 247237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error dget'ing lower_dentry\n"); 248237fead6SMichael Halcrow goto out; 249237fead6SMichael Halcrow } 250237fead6SMichael Halcrow lower_flags = ((O_CREAT | O_WRONLY | O_TRUNC) & O_ACCMODE) | O_RDWR; 251237fead6SMichael Halcrow #if BITS_PER_LONG != 32 252237fead6SMichael Halcrow lower_flags |= O_LARGEFILE; 253237fead6SMichael Halcrow #endif 254237fead6SMichael Halcrow lower_mnt = ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry); 255237fead6SMichael Halcrow mntget(lower_mnt); 256237fead6SMichael Halcrow /* Corresponding fput() at end of this function */ 257237fead6SMichael Halcrow lower_file = dentry_open(tlower_dentry, lower_mnt, lower_flags); 258237fead6SMichael Halcrow if (IS_ERR(lower_file)) { 259237fead6SMichael Halcrow rc = PTR_ERR(lower_file); 260237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 261237fead6SMichael Halcrow "Error opening dentry; rc = [%i]\n", rc); 262237fead6SMichael Halcrow goto out; 263237fead6SMichael Halcrow } 264237fead6SMichael Halcrow /* fput(lower_file) should handle the puts if we do this */ 265237fead6SMichael Halcrow lower_file->f_dentry = tlower_dentry; 266237fead6SMichael Halcrow lower_file->f_vfsmnt = lower_mnt; 267237fead6SMichael Halcrow lower_inode = tlower_dentry->d_inode; 268237fead6SMichael Halcrow if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) { 269237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "This is a directory\n"); 270237fead6SMichael Halcrow ECRYPTFS_CLEAR_FLAG(crypt_stat->flags, ECRYPTFS_ENCRYPTED); 271237fead6SMichael Halcrow goto out_fput; 272237fead6SMichael Halcrow } 273237fead6SMichael Halcrow ECRYPTFS_SET_FLAG(crypt_stat->flags, ECRYPTFS_NEW_FILE); 274237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Initializing crypto context\n"); 275237fead6SMichael Halcrow rc = ecryptfs_new_file_context(ecryptfs_dentry); 276237fead6SMichael Halcrow if (rc) { 277237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Error creating new file " 278237fead6SMichael Halcrow "context\n"); 279237fead6SMichael Halcrow goto out_fput; 280237fead6SMichael Halcrow } 281237fead6SMichael Halcrow rc = ecryptfs_write_headers(ecryptfs_dentry, lower_file); 282237fead6SMichael Halcrow if (rc) { 283237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Error writing headers\n"); 284237fead6SMichael Halcrow goto out_fput; 285237fead6SMichael Halcrow } 286237fead6SMichael Halcrow rc = grow_file(ecryptfs_dentry, lower_file, inode, lower_inode); 287237fead6SMichael Halcrow out_fput: 288237fead6SMichael Halcrow fput(lower_file); 289237fead6SMichael Halcrow out: 290237fead6SMichael Halcrow return rc; 291237fead6SMichael Halcrow } 292237fead6SMichael Halcrow 293237fead6SMichael Halcrow /** 294237fead6SMichael Halcrow * ecryptfs_create 295237fead6SMichael Halcrow * @dir: The inode of the directory in which to create the file. 296237fead6SMichael Halcrow * @dentry: The eCryptfs dentry 297237fead6SMichael Halcrow * @mode: The mode of the new file. 298237fead6SMichael Halcrow * @nd: nameidata 299237fead6SMichael Halcrow * 300237fead6SMichael Halcrow * Creates a new file. 301237fead6SMichael Halcrow * 302237fead6SMichael Halcrow * Returns zero on success; non-zero on error condition 303237fead6SMichael Halcrow */ 304237fead6SMichael Halcrow static int 305237fead6SMichael Halcrow ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry, 306237fead6SMichael Halcrow int mode, struct nameidata *nd) 307237fead6SMichael Halcrow { 308237fead6SMichael Halcrow int rc; 309237fead6SMichael Halcrow 310237fead6SMichael Halcrow rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd); 311237fead6SMichael Halcrow if (unlikely(rc)) { 312237fead6SMichael Halcrow ecryptfs_printk(KERN_WARNING, "Failed to create file in" 313237fead6SMichael Halcrow "lower filesystem\n"); 314237fead6SMichael Halcrow goto out; 315237fead6SMichael Halcrow } 316237fead6SMichael Halcrow /* At this point, a file exists on "disk"; we need to make sure 317237fead6SMichael Halcrow * that this on disk file is prepared to be an ecryptfs file */ 318237fead6SMichael Halcrow rc = ecryptfs_initialize_file(ecryptfs_dentry); 319237fead6SMichael Halcrow out: 320237fead6SMichael Halcrow return rc; 321237fead6SMichael Halcrow } 322237fead6SMichael Halcrow 323237fead6SMichael Halcrow /** 324237fead6SMichael Halcrow * ecryptfs_lookup 325237fead6SMichael Halcrow * @dir: inode 326237fead6SMichael Halcrow * @dentry: The dentry 327237fead6SMichael Halcrow * @nd: nameidata, may be NULL 328237fead6SMichael Halcrow * 329237fead6SMichael Halcrow * Find a file on disk. If the file does not exist, then we'll add it to the 330237fead6SMichael Halcrow * dentry cache and continue on to read it from the disk. 331237fead6SMichael Halcrow */ 332237fead6SMichael Halcrow static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry, 333237fead6SMichael Halcrow struct nameidata *nd) 334237fead6SMichael Halcrow { 335237fead6SMichael Halcrow int rc = 0; 336237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 337237fead6SMichael Halcrow struct dentry *lower_dentry; 338237fead6SMichael Halcrow struct vfsmount *lower_mnt; 339237fead6SMichael Halcrow struct dentry *tlower_dentry = NULL; 340237fead6SMichael Halcrow char *encoded_name; 341237fead6SMichael Halcrow unsigned int encoded_namelen; 342237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 343237fead6SMichael Halcrow char *page_virt = NULL; 344237fead6SMichael Halcrow struct inode *lower_inode; 345237fead6SMichael Halcrow u64 file_size; 346237fead6SMichael Halcrow 347237fead6SMichael Halcrow lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent); 348237fead6SMichael Halcrow dentry->d_op = &ecryptfs_dops; 349237fead6SMichael Halcrow if ((dentry->d_name.len == 1 && !strcmp(dentry->d_name.name, ".")) 350237fead6SMichael Halcrow || (dentry->d_name.len == 2 && !strcmp(dentry->d_name.name, ".."))) 351237fead6SMichael Halcrow goto out_drop; 352237fead6SMichael Halcrow encoded_namelen = ecryptfs_encode_filename(crypt_stat, 353237fead6SMichael Halcrow dentry->d_name.name, 354237fead6SMichael Halcrow dentry->d_name.len, 355237fead6SMichael Halcrow &encoded_name); 356237fead6SMichael Halcrow if (encoded_namelen < 0) { 357237fead6SMichael Halcrow rc = encoded_namelen; 358237fead6SMichael Halcrow goto out_drop; 359237fead6SMichael Halcrow } 360237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "encoded_name = [%s]; encoded_namelen " 361237fead6SMichael Halcrow "= [%d]\n", encoded_name, encoded_namelen); 362237fead6SMichael Halcrow lower_dentry = lookup_one_len(encoded_name, lower_dir_dentry, 363237fead6SMichael Halcrow encoded_namelen - 1); 364237fead6SMichael Halcrow kfree(encoded_name); 365237fead6SMichael Halcrow lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); 366237fead6SMichael Halcrow if (IS_ERR(lower_dentry)) { 367237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "ERR from lower_dentry\n"); 368237fead6SMichael Halcrow rc = PTR_ERR(lower_dentry); 369237fead6SMichael Halcrow goto out_drop; 370237fead6SMichael Halcrow } 371237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "lower_dentry = [%p]; lower_dentry->" 372237fead6SMichael Halcrow "d_name.name = [%s]\n", lower_dentry, 373237fead6SMichael Halcrow lower_dentry->d_name.name); 374237fead6SMichael Halcrow lower_inode = lower_dentry->d_inode; 375237fead6SMichael Halcrow ecryptfs_copy_attr_atime(dir, lower_dir_dentry->d_inode); 376237fead6SMichael Halcrow BUG_ON(!atomic_read(&lower_dentry->d_count)); 377237fead6SMichael Halcrow ecryptfs_set_dentry_private(dentry, 378237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_dentry_info_cache, 379237fead6SMichael Halcrow SLAB_KERNEL)); 380237fead6SMichael Halcrow if (!ecryptfs_dentry_to_private(dentry)) { 381237fead6SMichael Halcrow rc = -ENOMEM; 382237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory whilst attempting " 383237fead6SMichael Halcrow "to allocate ecryptfs_dentry_info struct\n"); 384237fead6SMichael Halcrow goto out_dput; 385237fead6SMichael Halcrow } 386237fead6SMichael Halcrow ecryptfs_set_dentry_lower(dentry, lower_dentry); 387237fead6SMichael Halcrow ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt); 388237fead6SMichael Halcrow if (!lower_dentry->d_inode) { 389237fead6SMichael Halcrow /* We want to add because we couldn't find in lower */ 390237fead6SMichael Halcrow d_add(dentry, NULL); 391237fead6SMichael Halcrow goto out; 392237fead6SMichael Halcrow } 393237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1); 394237fead6SMichael Halcrow if (rc) { 395237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error interposing\n"); 396237fead6SMichael Halcrow goto out_dput; 397237fead6SMichael Halcrow } 398237fead6SMichael Halcrow if (S_ISDIR(lower_inode->i_mode)) { 399237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n"); 400237fead6SMichael Halcrow goto out; 401237fead6SMichael Halcrow } 402237fead6SMichael Halcrow if (S_ISLNK(lower_inode->i_mode)) { 403237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n"); 404237fead6SMichael Halcrow goto out; 405237fead6SMichael Halcrow } 406237fead6SMichael Halcrow if (!nd) { 407237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave" 408237fead6SMichael Halcrow "as we *think* we are about to unlink\n"); 409237fead6SMichael Halcrow goto out; 410237fead6SMichael Halcrow } 411237fead6SMichael Halcrow tlower_dentry = dget(lower_dentry); 412237fead6SMichael Halcrow if (!tlower_dentry || IS_ERR(tlower_dentry)) { 413237fead6SMichael Halcrow rc = -ENOMEM; 414237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Cannot dget lower_dentry\n"); 415237fead6SMichael Halcrow goto out_dput; 416237fead6SMichael Halcrow } 417237fead6SMichael Halcrow /* Released in this function */ 418237fead6SMichael Halcrow page_virt = 419237fead6SMichael Halcrow (char *)kmem_cache_alloc(ecryptfs_header_cache_2, 420237fead6SMichael Halcrow SLAB_USER); 421237fead6SMichael Halcrow if (!page_virt) { 422237fead6SMichael Halcrow rc = -ENOMEM; 423237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 424237fead6SMichael Halcrow "Cannot ecryptfs_kmalloc a page\n"); 425237fead6SMichael Halcrow goto out_dput; 426237fead6SMichael Halcrow } 427237fead6SMichael Halcrow memset(page_virt, 0, PAGE_CACHE_SIZE); 428237fead6SMichael Halcrow rc = ecryptfs_read_header_region(page_virt, tlower_dentry, nd->mnt); 429237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 430237fead6SMichael Halcrow if (!ECRYPTFS_CHECK_FLAG(crypt_stat->flags, ECRYPTFS_POLICY_APPLIED)) 431237fead6SMichael Halcrow ecryptfs_set_default_sizes(crypt_stat); 432237fead6SMichael Halcrow if (rc) { 433237fead6SMichael Halcrow rc = 0; 434237fead6SMichael Halcrow ecryptfs_printk(KERN_WARNING, "Error reading header region;" 435237fead6SMichael Halcrow " assuming unencrypted\n"); 436237fead6SMichael Halcrow } else { 437237fead6SMichael Halcrow if (!contains_ecryptfs_marker(page_virt 438237fead6SMichael Halcrow + ECRYPTFS_FILE_SIZE_BYTES)) { 439237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 440237fead6SMichael Halcrow goto out; 441237fead6SMichael Halcrow } 442237fead6SMichael Halcrow memcpy(&file_size, page_virt, sizeof(file_size)); 443237fead6SMichael Halcrow file_size = be64_to_cpu(file_size); 444237fead6SMichael Halcrow i_size_write(dentry->d_inode, (loff_t)file_size); 445237fead6SMichael Halcrow } 446237fead6SMichael Halcrow kmem_cache_free(ecryptfs_header_cache_2, page_virt); 447237fead6SMichael Halcrow goto out; 448237fead6SMichael Halcrow 449237fead6SMichael Halcrow out_dput: 450237fead6SMichael Halcrow dput(lower_dentry); 451237fead6SMichael Halcrow if (tlower_dentry) 452237fead6SMichael Halcrow dput(tlower_dentry); 453237fead6SMichael Halcrow out_drop: 454237fead6SMichael Halcrow d_drop(dentry); 455237fead6SMichael Halcrow out: 456237fead6SMichael Halcrow return ERR_PTR(rc); 457237fead6SMichael Halcrow } 458237fead6SMichael Halcrow 459237fead6SMichael Halcrow static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, 460237fead6SMichael Halcrow struct dentry *new_dentry) 461237fead6SMichael Halcrow { 462237fead6SMichael Halcrow struct dentry *lower_old_dentry; 463237fead6SMichael Halcrow struct dentry *lower_new_dentry; 464237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 465237fead6SMichael Halcrow u64 file_size_save; 466237fead6SMichael Halcrow int rc; 467237fead6SMichael Halcrow 468237fead6SMichael Halcrow file_size_save = i_size_read(old_dentry->d_inode); 469237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 470237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 471237fead6SMichael Halcrow dget(lower_old_dentry); 472237fead6SMichael Halcrow dget(lower_new_dentry); 473237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_new_dentry); 474237fead6SMichael Halcrow rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode, 475237fead6SMichael Halcrow lower_new_dentry); 476237fead6SMichael Halcrow if (rc || !lower_new_dentry->d_inode) 477237fead6SMichael Halcrow goto out_lock; 478237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0); 479237fead6SMichael Halcrow if (rc) 480237fead6SMichael Halcrow goto out_lock; 481237fead6SMichael Halcrow ecryptfs_copy_attr_timesizes(dir, lower_new_dentry->d_inode); 482237fead6SMichael Halcrow old_dentry->d_inode->i_nlink = 483237fead6SMichael Halcrow ecryptfs_inode_to_lower(old_dentry->d_inode)->i_nlink; 484237fead6SMichael Halcrow i_size_write(new_dentry->d_inode, file_size_save); 485237fead6SMichael Halcrow out_lock: 486237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 487237fead6SMichael Halcrow dput(lower_new_dentry); 488237fead6SMichael Halcrow dput(lower_old_dentry); 489237fead6SMichael Halcrow if (!new_dentry->d_inode) 490237fead6SMichael Halcrow d_drop(new_dentry); 491237fead6SMichael Halcrow return rc; 492237fead6SMichael Halcrow } 493237fead6SMichael Halcrow 494237fead6SMichael Halcrow static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry) 495237fead6SMichael Halcrow { 496237fead6SMichael Halcrow int rc = 0; 497237fead6SMichael Halcrow struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); 498237fead6SMichael Halcrow struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir); 499237fead6SMichael Halcrow 500237fead6SMichael Halcrow lock_parent(lower_dentry); 501237fead6SMichael Halcrow rc = vfs_unlink(lower_dir_inode, lower_dentry); 502237fead6SMichael Halcrow if (rc) { 503237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error in vfs_unlink\n"); 504237fead6SMichael Halcrow goto out_unlock; 505237fead6SMichael Halcrow } 506237fead6SMichael Halcrow ecryptfs_copy_attr_times(dir, lower_dir_inode); 507237fead6SMichael Halcrow dentry->d_inode->i_nlink = 508237fead6SMichael Halcrow ecryptfs_inode_to_lower(dentry->d_inode)->i_nlink; 509237fead6SMichael Halcrow dentry->d_inode->i_ctime = dir->i_ctime; 510237fead6SMichael Halcrow out_unlock: 511237fead6SMichael Halcrow unlock_parent(lower_dentry); 512237fead6SMichael Halcrow return rc; 513237fead6SMichael Halcrow } 514237fead6SMichael Halcrow 515237fead6SMichael Halcrow static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry, 516237fead6SMichael Halcrow const char *symname) 517237fead6SMichael Halcrow { 518237fead6SMichael Halcrow int rc; 519237fead6SMichael Halcrow struct dentry *lower_dentry; 520237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 521237fead6SMichael Halcrow umode_t mode; 522237fead6SMichael Halcrow char *encoded_symname; 523237fead6SMichael Halcrow unsigned int encoded_symlen; 524237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat = NULL; 525237fead6SMichael Halcrow 526237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 527237fead6SMichael Halcrow dget(lower_dentry); 528237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 529237fead6SMichael Halcrow mode = S_IALLUGO; 530237fead6SMichael Halcrow encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname, 531237fead6SMichael Halcrow strlen(symname), 532237fead6SMichael Halcrow &encoded_symname); 533237fead6SMichael Halcrow if (encoded_symlen < 0) { 534237fead6SMichael Halcrow rc = encoded_symlen; 535237fead6SMichael Halcrow goto out_lock; 536237fead6SMichael Halcrow } 537237fead6SMichael Halcrow rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry, 538237fead6SMichael Halcrow encoded_symname, mode); 539237fead6SMichael Halcrow kfree(encoded_symname); 540237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 541237fead6SMichael Halcrow goto out_lock; 542237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 543237fead6SMichael Halcrow if (rc) 544237fead6SMichael Halcrow goto out_lock; 545237fead6SMichael Halcrow ecryptfs_copy_attr_timesizes(dir, lower_dir_dentry->d_inode); 546237fead6SMichael Halcrow out_lock: 547237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 548237fead6SMichael Halcrow dput(lower_dentry); 549237fead6SMichael Halcrow if (!dentry->d_inode) 550237fead6SMichael Halcrow d_drop(dentry); 551237fead6SMichael Halcrow return rc; 552237fead6SMichael Halcrow } 553237fead6SMichael Halcrow 554237fead6SMichael Halcrow static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 555237fead6SMichael Halcrow { 556237fead6SMichael Halcrow int rc; 557237fead6SMichael Halcrow struct dentry *lower_dentry; 558237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 559237fead6SMichael Halcrow 560237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 561237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 562237fead6SMichael Halcrow rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode); 563237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 564237fead6SMichael Halcrow goto out; 565237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 566237fead6SMichael Halcrow if (rc) 567237fead6SMichael Halcrow goto out; 568237fead6SMichael Halcrow ecryptfs_copy_attr_timesizes(dir, lower_dir_dentry->d_inode); 569237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 570237fead6SMichael Halcrow out: 571237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 572237fead6SMichael Halcrow if (!dentry->d_inode) 573237fead6SMichael Halcrow d_drop(dentry); 574237fead6SMichael Halcrow return rc; 575237fead6SMichael Halcrow } 576237fead6SMichael Halcrow 577237fead6SMichael Halcrow static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry) 578237fead6SMichael Halcrow { 579237fead6SMichael Halcrow int rc = 0; 580237fead6SMichael Halcrow struct dentry *tdentry = NULL; 581237fead6SMichael Halcrow struct dentry *lower_dentry; 582237fead6SMichael Halcrow struct dentry *tlower_dentry = NULL; 583237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 584237fead6SMichael Halcrow 585237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 586237fead6SMichael Halcrow if (!(tdentry = dget(dentry))) { 587237fead6SMichael Halcrow rc = -EINVAL; 588237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error dget'ing dentry [%p]\n", 589237fead6SMichael Halcrow dentry); 590237fead6SMichael Halcrow goto out; 591237fead6SMichael Halcrow } 592237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 593237fead6SMichael Halcrow if (!(tlower_dentry = dget(lower_dentry))) { 594237fead6SMichael Halcrow rc = -EINVAL; 595237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Error dget'ing lower_dentry " 596237fead6SMichael Halcrow "[%p]\n", lower_dentry); 597237fead6SMichael Halcrow goto out; 598237fead6SMichael Halcrow } 599237fead6SMichael Halcrow rc = vfs_rmdir(lower_dir_dentry->d_inode, lower_dentry); 600237fead6SMichael Halcrow if (!rc) { 601237fead6SMichael Halcrow d_delete(tlower_dentry); 602237fead6SMichael Halcrow tlower_dentry = NULL; 603237fead6SMichael Halcrow } 604237fead6SMichael Halcrow ecryptfs_copy_attr_times(dir, lower_dir_dentry->d_inode); 605237fead6SMichael Halcrow dir->i_nlink = lower_dir_dentry->d_inode->i_nlink; 606237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 607237fead6SMichael Halcrow if (!rc) 608237fead6SMichael Halcrow d_drop(dentry); 609237fead6SMichael Halcrow out: 610237fead6SMichael Halcrow if (tdentry) 611237fead6SMichael Halcrow dput(tdentry); 612237fead6SMichael Halcrow if (tlower_dentry) 613237fead6SMichael Halcrow dput(tlower_dentry); 614237fead6SMichael Halcrow return rc; 615237fead6SMichael Halcrow } 616237fead6SMichael Halcrow 617237fead6SMichael Halcrow static int 618237fead6SMichael Halcrow ecryptfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) 619237fead6SMichael Halcrow { 620237fead6SMichael Halcrow int rc; 621237fead6SMichael Halcrow struct dentry *lower_dentry; 622237fead6SMichael Halcrow struct dentry *lower_dir_dentry; 623237fead6SMichael Halcrow 624237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 625237fead6SMichael Halcrow lower_dir_dentry = lock_parent(lower_dentry); 626237fead6SMichael Halcrow rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev); 627237fead6SMichael Halcrow if (rc || !lower_dentry->d_inode) 628237fead6SMichael Halcrow goto out; 629237fead6SMichael Halcrow rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0); 630237fead6SMichael Halcrow if (rc) 631237fead6SMichael Halcrow goto out; 632237fead6SMichael Halcrow ecryptfs_copy_attr_timesizes(dir, lower_dir_dentry->d_inode); 633237fead6SMichael Halcrow out: 634237fead6SMichael Halcrow unlock_dir(lower_dir_dentry); 635237fead6SMichael Halcrow if (!dentry->d_inode) 636237fead6SMichael Halcrow d_drop(dentry); 637237fead6SMichael Halcrow return rc; 638237fead6SMichael Halcrow } 639237fead6SMichael Halcrow 640237fead6SMichael Halcrow static int 641237fead6SMichael Halcrow ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry, 642237fead6SMichael Halcrow struct inode *new_dir, struct dentry *new_dentry) 643237fead6SMichael Halcrow { 644237fead6SMichael Halcrow int rc; 645237fead6SMichael Halcrow struct dentry *lower_old_dentry; 646237fead6SMichael Halcrow struct dentry *lower_new_dentry; 647237fead6SMichael Halcrow struct dentry *lower_old_dir_dentry; 648237fead6SMichael Halcrow struct dentry *lower_new_dir_dentry; 649237fead6SMichael Halcrow 650237fead6SMichael Halcrow lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry); 651237fead6SMichael Halcrow lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry); 652237fead6SMichael Halcrow dget(lower_old_dentry); 653237fead6SMichael Halcrow dget(lower_new_dentry); 654237fead6SMichael Halcrow lower_old_dir_dentry = dget_parent(lower_old_dentry); 655237fead6SMichael Halcrow lower_new_dir_dentry = dget_parent(lower_new_dentry); 656237fead6SMichael Halcrow lock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 657237fead6SMichael Halcrow rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry, 658237fead6SMichael Halcrow lower_new_dir_dentry->d_inode, lower_new_dentry); 659237fead6SMichael Halcrow if (rc) 660237fead6SMichael Halcrow goto out_lock; 661237fead6SMichael Halcrow ecryptfs_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode); 662237fead6SMichael Halcrow if (new_dir != old_dir) 663237fead6SMichael Halcrow ecryptfs_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode); 664237fead6SMichael Halcrow out_lock: 665237fead6SMichael Halcrow unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry); 666237fead6SMichael Halcrow dput(lower_new_dentry); 667237fead6SMichael Halcrow dput(lower_old_dentry); 668237fead6SMichael Halcrow return rc; 669237fead6SMichael Halcrow } 670237fead6SMichael Halcrow 671237fead6SMichael Halcrow static int 672237fead6SMichael Halcrow ecryptfs_readlink(struct dentry *dentry, char __user * buf, int bufsiz) 673237fead6SMichael Halcrow { 674237fead6SMichael Halcrow int rc; 675237fead6SMichael Halcrow struct dentry *lower_dentry; 676237fead6SMichael Halcrow char *decoded_name; 677237fead6SMichael Halcrow char *lower_buf; 678237fead6SMichael Halcrow mm_segment_t old_fs; 679237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 680237fead6SMichael Halcrow 681237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 682237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op || 683237fead6SMichael Halcrow !lower_dentry->d_inode->i_op->readlink) { 684237fead6SMichael Halcrow rc = -EINVAL; 685237fead6SMichael Halcrow goto out; 686237fead6SMichael Halcrow } 687237fead6SMichael Halcrow /* Released in this function */ 688237fead6SMichael Halcrow lower_buf = kmalloc(bufsiz, GFP_KERNEL); 689237fead6SMichael Halcrow if (lower_buf == NULL) { 690237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, "Out of memory\n"); 691237fead6SMichael Halcrow rc = -ENOMEM; 692237fead6SMichael Halcrow goto out; 693237fead6SMichael Halcrow } 694237fead6SMichael Halcrow old_fs = get_fs(); 695237fead6SMichael Halcrow set_fs(get_ds()); 696237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 697237fead6SMichael Halcrow "lower_dentry->d_name.name = [%s]\n", 698237fead6SMichael Halcrow lower_dentry->d_name.name); 699237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, 700237fead6SMichael Halcrow (char __user *)lower_buf, 701237fead6SMichael Halcrow bufsiz); 702237fead6SMichael Halcrow set_fs(old_fs); 703237fead6SMichael Halcrow if (rc >= 0) { 704237fead6SMichael Halcrow crypt_stat = NULL; 705237fead6SMichael Halcrow rc = ecryptfs_decode_filename(crypt_stat, lower_buf, rc, 706237fead6SMichael Halcrow &decoded_name); 707237fead6SMichael Halcrow if (rc == -ENOMEM) 708237fead6SMichael Halcrow goto out_free_lower_buf; 709237fead6SMichael Halcrow if (rc > 0) { 710237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Copying [%d] bytes " 711237fead6SMichael Halcrow "to userspace: [%*s]\n", rc, 712237fead6SMichael Halcrow decoded_name); 713237fead6SMichael Halcrow if (copy_to_user(buf, decoded_name, rc)) 714237fead6SMichael Halcrow rc = -EFAULT; 715237fead6SMichael Halcrow } 716237fead6SMichael Halcrow kfree(decoded_name); 717237fead6SMichael Halcrow ecryptfs_copy_attr_atime(dentry->d_inode, 718237fead6SMichael Halcrow lower_dentry->d_inode); 719237fead6SMichael Halcrow } 720237fead6SMichael Halcrow out_free_lower_buf: 721237fead6SMichael Halcrow kfree(lower_buf); 722237fead6SMichael Halcrow out: 723237fead6SMichael Halcrow return rc; 724237fead6SMichael Halcrow } 725237fead6SMichael Halcrow 726237fead6SMichael Halcrow static void *ecryptfs_follow_link(struct dentry *dentry, struct nameidata *nd) 727237fead6SMichael Halcrow { 728237fead6SMichael Halcrow char *buf; 729237fead6SMichael Halcrow int len = PAGE_SIZE, rc; 730237fead6SMichael Halcrow mm_segment_t old_fs; 731237fead6SMichael Halcrow 732237fead6SMichael Halcrow /* Released in ecryptfs_put_link(); only release here on error */ 733237fead6SMichael Halcrow buf = kmalloc(len, GFP_KERNEL); 734237fead6SMichael Halcrow if (!buf) { 735237fead6SMichael Halcrow rc = -ENOMEM; 736237fead6SMichael Halcrow goto out; 737237fead6SMichael Halcrow } 738237fead6SMichael Halcrow old_fs = get_fs(); 739237fead6SMichael Halcrow set_fs(get_ds()); 740237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "Calling readlink w/ " 741237fead6SMichael Halcrow "dentry->d_name.name = [%s]\n", dentry->d_name.name); 742237fead6SMichael Halcrow rc = dentry->d_inode->i_op->readlink(dentry, (char __user *)buf, len); 743237fead6SMichael Halcrow buf[rc] = '\0'; 744237fead6SMichael Halcrow set_fs(old_fs); 745237fead6SMichael Halcrow if (rc < 0) 746237fead6SMichael Halcrow goto out_free; 747237fead6SMichael Halcrow rc = 0; 748237fead6SMichael Halcrow nd_set_link(nd, buf); 749237fead6SMichael Halcrow goto out; 750237fead6SMichael Halcrow out_free: 751237fead6SMichael Halcrow kfree(buf); 752237fead6SMichael Halcrow out: 753237fead6SMichael Halcrow return ERR_PTR(rc); 754237fead6SMichael Halcrow } 755237fead6SMichael Halcrow 756237fead6SMichael Halcrow static void 757237fead6SMichael Halcrow ecryptfs_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr) 758237fead6SMichael Halcrow { 759237fead6SMichael Halcrow /* Free the char* */ 760237fead6SMichael Halcrow kfree(nd_get_link(nd)); 761237fead6SMichael Halcrow } 762237fead6SMichael Halcrow 763237fead6SMichael Halcrow /** 764237fead6SMichael Halcrow * upper_size_to_lower_size 765237fead6SMichael Halcrow * @crypt_stat: Crypt_stat associated with file 766237fead6SMichael Halcrow * @upper_size: Size of the upper file 767237fead6SMichael Halcrow * 768237fead6SMichael Halcrow * Calculate the requried size of the lower file based on the 769237fead6SMichael Halcrow * specified size of the upper file. This calculation is based on the 770237fead6SMichael Halcrow * number of headers in the underlying file and the extent size. 771237fead6SMichael Halcrow * 772237fead6SMichael Halcrow * Returns Calculated size of the lower file. 773237fead6SMichael Halcrow */ 774237fead6SMichael Halcrow static loff_t 775237fead6SMichael Halcrow upper_size_to_lower_size(struct ecryptfs_crypt_stat *crypt_stat, 776237fead6SMichael Halcrow loff_t upper_size) 777237fead6SMichael Halcrow { 778237fead6SMichael Halcrow loff_t lower_size; 779237fead6SMichael Halcrow 780237fead6SMichael Halcrow lower_size = ( crypt_stat->header_extent_size 781237fead6SMichael Halcrow * crypt_stat->num_header_extents_at_front ); 782237fead6SMichael Halcrow if (upper_size != 0) { 783237fead6SMichael Halcrow loff_t num_extents; 784237fead6SMichael Halcrow 785237fead6SMichael Halcrow num_extents = upper_size >> crypt_stat->extent_shift; 786237fead6SMichael Halcrow if (upper_size & ~crypt_stat->extent_mask) 787237fead6SMichael Halcrow num_extents++; 788237fead6SMichael Halcrow lower_size += (num_extents * crypt_stat->extent_size); 789237fead6SMichael Halcrow } 790237fead6SMichael Halcrow return lower_size; 791237fead6SMichael Halcrow } 792237fead6SMichael Halcrow 793237fead6SMichael Halcrow /** 794237fead6SMichael Halcrow * ecryptfs_truncate 795237fead6SMichael Halcrow * @dentry: The ecryptfs layer dentry 796237fead6SMichael Halcrow * @new_length: The length to expand the file to 797237fead6SMichael Halcrow * 798237fead6SMichael Halcrow * Function to handle truncations modifying the size of the file. Note 799237fead6SMichael Halcrow * that the file sizes are interpolated. When expanding, we are simply 800237fead6SMichael Halcrow * writing strings of 0's out. When truncating, we need to modify the 801237fead6SMichael Halcrow * underlying file size according to the page index interpolations. 802237fead6SMichael Halcrow * 803237fead6SMichael Halcrow * Returns zero on success; non-zero otherwise 804237fead6SMichael Halcrow */ 805237fead6SMichael Halcrow int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) 806237fead6SMichael Halcrow { 807237fead6SMichael Halcrow int rc = 0; 808237fead6SMichael Halcrow struct inode *inode = dentry->d_inode; 809237fead6SMichael Halcrow struct dentry *lower_dentry; 810237fead6SMichael Halcrow struct vfsmount *lower_mnt; 811237fead6SMichael Halcrow struct file fake_ecryptfs_file, *lower_file = NULL; 812237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 813237fead6SMichael Halcrow loff_t i_size = i_size_read(inode); 814237fead6SMichael Halcrow loff_t lower_size_before_truncate; 815237fead6SMichael Halcrow loff_t lower_size_after_truncate; 816237fead6SMichael Halcrow 817237fead6SMichael Halcrow if (unlikely((new_length == i_size))) 818237fead6SMichael Halcrow goto out; 819237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 820237fead6SMichael Halcrow /* Set up a fake ecryptfs file, this is used to interface with 821237fead6SMichael Halcrow * the file in the underlying filesystem so that the 822237fead6SMichael Halcrow * truncation has an effect there as well. */ 823237fead6SMichael Halcrow memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file)); 824237fead6SMichael Halcrow fake_ecryptfs_file.f_dentry = dentry; 825237fead6SMichael Halcrow /* Released at out_free: label */ 826237fead6SMichael Halcrow ecryptfs_set_file_private(&fake_ecryptfs_file, 827237fead6SMichael Halcrow kmem_cache_alloc(ecryptfs_file_info_cache, 828237fead6SMichael Halcrow SLAB_KERNEL)); 829237fead6SMichael Halcrow if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) { 830237fead6SMichael Halcrow rc = -ENOMEM; 831237fead6SMichael Halcrow goto out; 832237fead6SMichael Halcrow } 833237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 834237fead6SMichael Halcrow /* This dget & mntget is released through fput at out_fput: */ 835237fead6SMichael Halcrow dget(lower_dentry); 836237fead6SMichael Halcrow lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); 837237fead6SMichael Halcrow mntget(lower_mnt); 838237fead6SMichael Halcrow lower_file = dentry_open(lower_dentry, lower_mnt, O_RDWR); 839237fead6SMichael Halcrow if (unlikely(IS_ERR(lower_file))) { 840237fead6SMichael Halcrow rc = PTR_ERR(lower_file); 841237fead6SMichael Halcrow goto out_free; 842237fead6SMichael Halcrow } 843237fead6SMichael Halcrow ecryptfs_set_file_lower(&fake_ecryptfs_file, lower_file); 844237fead6SMichael Halcrow /* Switch on growing or shrinking file */ 845237fead6SMichael Halcrow if (new_length > i_size) { 846237fead6SMichael Halcrow rc = ecryptfs_fill_zeros(&fake_ecryptfs_file, new_length); 847237fead6SMichael Halcrow if (rc) { 848237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 849237fead6SMichael Halcrow "Problem with fill_zeros\n"); 850237fead6SMichael Halcrow goto out_fput; 851237fead6SMichael Halcrow } 852237fead6SMichael Halcrow i_size_write(inode, new_length); 853237fead6SMichael Halcrow rc = ecryptfs_write_inode_size_to_header(lower_file, 854237fead6SMichael Halcrow lower_dentry->d_inode, 855237fead6SMichael Halcrow inode); 856237fead6SMichael Halcrow if (rc) { 857237fead6SMichael Halcrow ecryptfs_printk(KERN_ERR, 858237fead6SMichael Halcrow "Problem with ecryptfs_write" 859237fead6SMichael Halcrow "_inode_size\n"); 860237fead6SMichael Halcrow goto out_fput; 861237fead6SMichael Halcrow } 862237fead6SMichael Halcrow } else { /* new_length < i_size_read(inode) */ 863237fead6SMichael Halcrow vmtruncate(inode, new_length); 864237fead6SMichael Halcrow ecryptfs_write_inode_size_to_header(lower_file, 865237fead6SMichael Halcrow lower_dentry->d_inode, 866237fead6SMichael Halcrow inode); 867237fead6SMichael Halcrow /* We are reducing the size of the ecryptfs file, and need to 868237fead6SMichael Halcrow * know if we need to reduce the size of the lower file. */ 869237fead6SMichael Halcrow lower_size_before_truncate = 870237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, i_size); 871237fead6SMichael Halcrow lower_size_after_truncate = 872237fead6SMichael Halcrow upper_size_to_lower_size(crypt_stat, new_length); 873237fead6SMichael Halcrow if (lower_size_after_truncate < lower_size_before_truncate) 874237fead6SMichael Halcrow vmtruncate(lower_dentry->d_inode, 875237fead6SMichael Halcrow lower_size_after_truncate); 876237fead6SMichael Halcrow } 877237fead6SMichael Halcrow /* Update the access times */ 878237fead6SMichael Halcrow lower_dentry->d_inode->i_mtime = lower_dentry->d_inode->i_ctime 879237fead6SMichael Halcrow = CURRENT_TIME; 880237fead6SMichael Halcrow mark_inode_dirty_sync(inode); 881237fead6SMichael Halcrow out_fput: 882237fead6SMichael Halcrow fput(lower_file); 883237fead6SMichael Halcrow out_free: 884237fead6SMichael Halcrow if (ecryptfs_file_to_private(&fake_ecryptfs_file)) 885237fead6SMichael Halcrow kmem_cache_free(ecryptfs_file_info_cache, 886237fead6SMichael Halcrow ecryptfs_file_to_private(&fake_ecryptfs_file)); 887237fead6SMichael Halcrow out: 888237fead6SMichael Halcrow return rc; 889237fead6SMichael Halcrow } 890237fead6SMichael Halcrow 891237fead6SMichael Halcrow static int 892237fead6SMichael Halcrow ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd) 893237fead6SMichael Halcrow { 894237fead6SMichael Halcrow int rc; 895237fead6SMichael Halcrow 896237fead6SMichael Halcrow if (nd) { 897237fead6SMichael Halcrow struct vfsmount *vfsmnt_save = nd->mnt; 898237fead6SMichael Halcrow struct dentry *dentry_save = nd->dentry; 899237fead6SMichael Halcrow 900237fead6SMichael Halcrow nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry); 901237fead6SMichael Halcrow nd->dentry = ecryptfs_dentry_to_lower(nd->dentry); 902237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, nd); 903237fead6SMichael Halcrow nd->mnt = vfsmnt_save; 904237fead6SMichael Halcrow nd->dentry = dentry_save; 905237fead6SMichael Halcrow } else 906237fead6SMichael Halcrow rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL); 907237fead6SMichael Halcrow return rc; 908237fead6SMichael Halcrow } 909237fead6SMichael Halcrow 910237fead6SMichael Halcrow /** 911237fead6SMichael Halcrow * ecryptfs_setattr 912237fead6SMichael Halcrow * @dentry: dentry handle to the inode to modify 913237fead6SMichael Halcrow * @ia: Structure with flags of what to change and values 914237fead6SMichael Halcrow * 915237fead6SMichael Halcrow * Updates the metadata of an inode. If the update is to the size 916237fead6SMichael Halcrow * i.e. truncation, then ecryptfs_truncate will handle the size modification 917237fead6SMichael Halcrow * of both the ecryptfs inode and the lower inode. 918237fead6SMichael Halcrow * 919237fead6SMichael Halcrow * All other metadata changes will be passed right to the lower filesystem, 920237fead6SMichael Halcrow * and we will just update our inode to look like the lower. 921237fead6SMichael Halcrow */ 922237fead6SMichael Halcrow static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) 923237fead6SMichael Halcrow { 924237fead6SMichael Halcrow int rc = 0; 925237fead6SMichael Halcrow struct dentry *lower_dentry; 926237fead6SMichael Halcrow struct inode *inode; 927237fead6SMichael Halcrow struct inode *lower_inode; 928237fead6SMichael Halcrow struct ecryptfs_crypt_stat *crypt_stat; 929237fead6SMichael Halcrow 930237fead6SMichael Halcrow crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; 931237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 932237fead6SMichael Halcrow inode = dentry->d_inode; 933237fead6SMichael Halcrow lower_inode = ecryptfs_inode_to_lower(inode); 934237fead6SMichael Halcrow if (ia->ia_valid & ATTR_SIZE) { 935237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, 936237fead6SMichael Halcrow "ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n", 937237fead6SMichael Halcrow ia->ia_valid, ATTR_SIZE); 938237fead6SMichael Halcrow rc = ecryptfs_truncate(dentry, ia->ia_size); 939237fead6SMichael Halcrow /* ecryptfs_truncate handles resizing of the lower file */ 940237fead6SMichael Halcrow ia->ia_valid &= ~ATTR_SIZE; 941237fead6SMichael Halcrow ecryptfs_printk(KERN_DEBUG, "ia->ia_valid = [%x]\n", 942237fead6SMichael Halcrow ia->ia_valid); 943237fead6SMichael Halcrow if (rc < 0) 944237fead6SMichael Halcrow goto out; 945237fead6SMichael Halcrow } 946237fead6SMichael Halcrow rc = notify_change(lower_dentry, ia); 947237fead6SMichael Halcrow out: 948237fead6SMichael Halcrow ecryptfs_copy_attr_all(inode, lower_inode); 949237fead6SMichael Halcrow return rc; 950237fead6SMichael Halcrow } 951237fead6SMichael Halcrow 952237fead6SMichael Halcrow static int 953237fead6SMichael Halcrow ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, 954237fead6SMichael Halcrow size_t size, int flags) 955237fead6SMichael Halcrow { 956237fead6SMichael Halcrow int rc = 0; 957237fead6SMichael Halcrow struct dentry *lower_dentry; 958237fead6SMichael Halcrow 959237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 960237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->setxattr) { 961237fead6SMichael Halcrow rc = -ENOSYS; 962237fead6SMichael Halcrow goto out; 963237fead6SMichael Halcrow } 964237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 965237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, 966237fead6SMichael Halcrow size, flags); 967237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 968237fead6SMichael Halcrow out: 969237fead6SMichael Halcrow return rc; 970237fead6SMichael Halcrow } 971237fead6SMichael Halcrow 972237fead6SMichael Halcrow static ssize_t 973237fead6SMichael Halcrow ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, 974237fead6SMichael Halcrow size_t size) 975237fead6SMichael Halcrow { 976237fead6SMichael Halcrow int rc = 0; 977237fead6SMichael Halcrow struct dentry *lower_dentry; 978237fead6SMichael Halcrow 979237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 980237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->getxattr) { 981237fead6SMichael Halcrow rc = -ENOSYS; 982237fead6SMichael Halcrow goto out; 983237fead6SMichael Halcrow } 984237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 985237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value, 986237fead6SMichael Halcrow size); 987237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 988237fead6SMichael Halcrow out: 989237fead6SMichael Halcrow return rc; 990237fead6SMichael Halcrow } 991237fead6SMichael Halcrow 992237fead6SMichael Halcrow static ssize_t 993237fead6SMichael Halcrow ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size) 994237fead6SMichael Halcrow { 995237fead6SMichael Halcrow int rc = 0; 996237fead6SMichael Halcrow struct dentry *lower_dentry; 997237fead6SMichael Halcrow 998237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 999237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->listxattr) { 1000237fead6SMichael Halcrow rc = -ENOSYS; 1001237fead6SMichael Halcrow goto out; 1002237fead6SMichael Halcrow } 1003237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 1004237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size); 1005237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 1006237fead6SMichael Halcrow out: 1007237fead6SMichael Halcrow return rc; 1008237fead6SMichael Halcrow } 1009237fead6SMichael Halcrow 1010237fead6SMichael Halcrow static int ecryptfs_removexattr(struct dentry *dentry, const char *name) 1011237fead6SMichael Halcrow { 1012237fead6SMichael Halcrow int rc = 0; 1013237fead6SMichael Halcrow struct dentry *lower_dentry; 1014237fead6SMichael Halcrow 1015237fead6SMichael Halcrow lower_dentry = ecryptfs_dentry_to_lower(dentry); 1016237fead6SMichael Halcrow if (!lower_dentry->d_inode->i_op->removexattr) { 1017237fead6SMichael Halcrow rc = -ENOSYS; 1018237fead6SMichael Halcrow goto out; 1019237fead6SMichael Halcrow } 1020237fead6SMichael Halcrow mutex_lock(&lower_dentry->d_inode->i_mutex); 1021237fead6SMichael Halcrow rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name); 1022237fead6SMichael Halcrow mutex_unlock(&lower_dentry->d_inode->i_mutex); 1023237fead6SMichael Halcrow out: 1024237fead6SMichael Halcrow return rc; 1025237fead6SMichael Halcrow } 1026237fead6SMichael Halcrow 1027237fead6SMichael Halcrow int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode) 1028237fead6SMichael Halcrow { 1029237fead6SMichael Halcrow if ((ecryptfs_inode_to_lower(inode) 1030237fead6SMichael Halcrow == (struct inode *)candidate_lower_inode)) 1031237fead6SMichael Halcrow return 1; 1032237fead6SMichael Halcrow else 1033237fead6SMichael Halcrow return 0; 1034237fead6SMichael Halcrow } 1035237fead6SMichael Halcrow 1036237fead6SMichael Halcrow int ecryptfs_inode_set(struct inode *inode, void *lower_inode) 1037237fead6SMichael Halcrow { 1038237fead6SMichael Halcrow ecryptfs_init_inode(inode, (struct inode *)lower_inode); 1039237fead6SMichael Halcrow return 0; 1040237fead6SMichael Halcrow } 1041237fead6SMichael Halcrow 1042237fead6SMichael Halcrow struct inode_operations ecryptfs_symlink_iops = { 1043237fead6SMichael Halcrow .readlink = ecryptfs_readlink, 1044237fead6SMichael Halcrow .follow_link = ecryptfs_follow_link, 1045237fead6SMichael Halcrow .put_link = ecryptfs_put_link, 1046237fead6SMichael Halcrow .permission = ecryptfs_permission, 1047237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1048237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1049237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1050237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1051237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1052237fead6SMichael Halcrow }; 1053237fead6SMichael Halcrow 1054237fead6SMichael Halcrow struct inode_operations ecryptfs_dir_iops = { 1055237fead6SMichael Halcrow .create = ecryptfs_create, 1056237fead6SMichael Halcrow .lookup = ecryptfs_lookup, 1057237fead6SMichael Halcrow .link = ecryptfs_link, 1058237fead6SMichael Halcrow .unlink = ecryptfs_unlink, 1059237fead6SMichael Halcrow .symlink = ecryptfs_symlink, 1060237fead6SMichael Halcrow .mkdir = ecryptfs_mkdir, 1061237fead6SMichael Halcrow .rmdir = ecryptfs_rmdir, 1062237fead6SMichael Halcrow .mknod = ecryptfs_mknod, 1063237fead6SMichael Halcrow .rename = ecryptfs_rename, 1064237fead6SMichael Halcrow .permission = ecryptfs_permission, 1065237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1066237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1067237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1068237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1069237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1070237fead6SMichael Halcrow }; 1071237fead6SMichael Halcrow 1072237fead6SMichael Halcrow struct inode_operations ecryptfs_main_iops = { 1073237fead6SMichael Halcrow .permission = ecryptfs_permission, 1074237fead6SMichael Halcrow .setattr = ecryptfs_setattr, 1075237fead6SMichael Halcrow .setxattr = ecryptfs_setxattr, 1076237fead6SMichael Halcrow .getxattr = ecryptfs_getxattr, 1077237fead6SMichael Halcrow .listxattr = ecryptfs_listxattr, 1078237fead6SMichael Halcrow .removexattr = ecryptfs_removexattr 1079237fead6SMichael Halcrow }; 1080