Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
| 2 | * inode.c - NTFS kernel inode handling. Part of the Linux-NTFS project. |
| 3 | * |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 4 | * Copyright (c) 2001-2007 Anton Altaparmakov |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program/include file is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as published |
| 8 | * by the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program/include file is distributed in the hope that it will be |
| 12 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| 13 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program (in the main directory of the Linux-NTFS |
| 18 | * distribution in the file COPYING); if not, write to the Free Software |
| 19 | * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/buffer_head.h> |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 23 | #include <linux/fs.h> |
| 24 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/mount.h> |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 27 | #include <linux/pagemap.h> |
| 28 | #include <linux/quotaops.h> |
| 29 | #include <linux/slab.h> |
Robert P. J. Day | 02d5341 | 2009-06-16 15:33:35 -0700 | [diff] [blame] | 30 | #include <linux/log2.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | #include "aops.h" |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 33 | #include "attrib.h" |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 34 | #include "bitmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "dir.h" |
| 36 | #include "debug.h" |
| 37 | #include "inode.h" |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 38 | #include "lcnalloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "malloc.h" |
| 40 | #include "mft.h" |
| 41 | #include "time.h" |
| 42 | #include "ntfs.h" |
| 43 | |
| 44 | /** |
| 45 | * ntfs_test_inode - compare two (possibly fake) inodes for equality |
| 46 | * @vi: vfs inode which to test |
| 47 | * @na: ntfs attribute which is being tested with |
| 48 | * |
| 49 | * Compare the ntfs attribute embedded in the ntfs specific part of the vfs |
| 50 | * inode @vi for equality with the ntfs attribute @na. |
| 51 | * |
| 52 | * If searching for the normal file/directory inode, set @na->type to AT_UNUSED. |
| 53 | * @na->name and @na->name_len are then ignored. |
| 54 | * |
| 55 | * Return 1 if the attributes match and 0 if not. |
| 56 | * |
Dave Chinner | 67a23c4 | 2011-03-22 22:23:42 +1100 | [diff] [blame] | 57 | * NOTE: This function runs with the inode->i_lock spin lock held so it is not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | * allowed to sleep. |
| 59 | */ |
| 60 | int ntfs_test_inode(struct inode *vi, ntfs_attr *na) |
| 61 | { |
| 62 | ntfs_inode *ni; |
| 63 | |
| 64 | if (vi->i_ino != na->mft_no) |
| 65 | return 0; |
| 66 | ni = NTFS_I(vi); |
| 67 | /* If !NInoAttr(ni), @vi is a normal file or directory inode. */ |
| 68 | if (likely(!NInoAttr(ni))) { |
| 69 | /* If not looking for a normal inode this is a mismatch. */ |
| 70 | if (unlikely(na->type != AT_UNUSED)) |
| 71 | return 0; |
| 72 | } else { |
| 73 | /* A fake inode describing an attribute. */ |
| 74 | if (ni->type != na->type) |
| 75 | return 0; |
| 76 | if (ni->name_len != na->name_len) |
| 77 | return 0; |
| 78 | if (na->name_len && memcmp(ni->name, na->name, |
| 79 | na->name_len * sizeof(ntfschar))) |
| 80 | return 0; |
| 81 | } |
| 82 | /* Match! */ |
| 83 | return 1; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * ntfs_init_locked_inode - initialize an inode |
| 88 | * @vi: vfs inode to initialize |
| 89 | * @na: ntfs attribute which to initialize @vi to |
| 90 | * |
| 91 | * Initialize the vfs inode @vi with the values from the ntfs attribute @na in |
| 92 | * order to enable ntfs_test_inode() to do its work. |
| 93 | * |
| 94 | * If initializing the normal file/directory inode, set @na->type to AT_UNUSED. |
| 95 | * In that case, @na->name and @na->name_len should be set to NULL and 0, |
| 96 | * respectively. Although that is not strictly necessary as |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 97 | * ntfs_read_locked_inode() will fill them in later. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | * |
| 99 | * Return 0 on success and -errno on error. |
| 100 | * |
Dave Chinner | 67a23c4 | 2011-03-22 22:23:42 +1100 | [diff] [blame] | 101 | * NOTE: This function runs with the inode->i_lock spin lock held so it is not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | * allowed to sleep. (Hence the GFP_ATOMIC allocation.) |
| 103 | */ |
| 104 | static int ntfs_init_locked_inode(struct inode *vi, ntfs_attr *na) |
| 105 | { |
| 106 | ntfs_inode *ni = NTFS_I(vi); |
| 107 | |
| 108 | vi->i_ino = na->mft_no; |
| 109 | |
| 110 | ni->type = na->type; |
| 111 | if (na->type == AT_INDEX_ALLOCATION) |
| 112 | NInoSetMstProtected(ni); |
| 113 | |
| 114 | ni->name = na->name; |
| 115 | ni->name_len = na->name_len; |
| 116 | |
| 117 | /* If initializing a normal inode, we are done. */ |
| 118 | if (likely(na->type == AT_UNUSED)) { |
| 119 | BUG_ON(na->name); |
| 120 | BUG_ON(na->name_len); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /* It is a fake inode. */ |
| 125 | NInoSetAttr(ni); |
| 126 | |
| 127 | /* |
| 128 | * We have I30 global constant as an optimization as it is the name |
| 129 | * in >99.9% of named attributes! The other <0.1% incur a GFP_ATOMIC |
| 130 | * allocation but that is ok. And most attributes are unnamed anyway, |
| 131 | * thus the fraction of named attributes with name != I30 is actually |
| 132 | * absolutely tiny. |
| 133 | */ |
| 134 | if (na->name_len && na->name != I30) { |
| 135 | unsigned int i; |
| 136 | |
| 137 | BUG_ON(!na->name); |
| 138 | i = na->name_len * sizeof(ntfschar); |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 139 | ni->name = kmalloc(i + sizeof(ntfschar), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | if (!ni->name) |
| 141 | return -ENOMEM; |
| 142 | memcpy(ni->name, na->name, i); |
Andrew Morton | 1fc799e | 2007-05-31 00:40:49 -0700 | [diff] [blame] | 143 | ni->name[na->name_len] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | typedef int (*set_t)(struct inode *, void *); |
| 149 | static int ntfs_read_locked_inode(struct inode *vi); |
| 150 | static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi); |
| 151 | static int ntfs_read_locked_index_inode(struct inode *base_vi, |
| 152 | struct inode *vi); |
| 153 | |
| 154 | /** |
| 155 | * ntfs_iget - obtain a struct inode corresponding to a specific normal inode |
| 156 | * @sb: super block of mounted volume |
| 157 | * @mft_no: mft record number / inode number to obtain |
| 158 | * |
| 159 | * Obtain the struct inode corresponding to a specific normal inode (i.e. a |
| 160 | * file or directory). |
| 161 | * |
| 162 | * If the inode is in the cache, it is just returned with an increased |
| 163 | * reference count. Otherwise, a new struct inode is allocated and initialized, |
| 164 | * and finally ntfs_read_locked_inode() is called to read in the inode and |
| 165 | * fill in the remainder of the inode structure. |
| 166 | * |
| 167 | * Return the struct inode on success. Check the return value with IS_ERR() and |
| 168 | * if true, the function failed and the error code is obtained from PTR_ERR(). |
| 169 | */ |
| 170 | struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no) |
| 171 | { |
| 172 | struct inode *vi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | int err; |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 174 | ntfs_attr na; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | na.mft_no = mft_no; |
| 177 | na.type = AT_UNUSED; |
| 178 | na.name = NULL; |
| 179 | na.name_len = 0; |
| 180 | |
| 181 | vi = iget5_locked(sb, mft_no, (test_t)ntfs_test_inode, |
| 182 | (set_t)ntfs_init_locked_inode, &na); |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 183 | if (unlikely(!vi)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | return ERR_PTR(-ENOMEM); |
| 185 | |
| 186 | err = 0; |
| 187 | |
| 188 | /* If this is a freshly allocated inode, need to read it now. */ |
| 189 | if (vi->i_state & I_NEW) { |
| 190 | err = ntfs_read_locked_inode(vi); |
| 191 | unlock_new_inode(vi); |
| 192 | } |
| 193 | /* |
| 194 | * There is no point in keeping bad inodes around if the failure was |
| 195 | * due to ENOMEM. We want to be able to retry again later. |
| 196 | */ |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 197 | if (unlikely(err == -ENOMEM)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | iput(vi); |
| 199 | vi = ERR_PTR(err); |
| 200 | } |
| 201 | return vi; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * ntfs_attr_iget - obtain a struct inode corresponding to an attribute |
| 206 | * @base_vi: vfs base inode containing the attribute |
| 207 | * @type: attribute type |
| 208 | * @name: Unicode name of the attribute (NULL if unnamed) |
| 209 | * @name_len: length of @name in Unicode characters (0 if unnamed) |
| 210 | * |
| 211 | * Obtain the (fake) struct inode corresponding to the attribute specified by |
| 212 | * @type, @name, and @name_len, which is present in the base mft record |
| 213 | * specified by the vfs inode @base_vi. |
| 214 | * |
| 215 | * If the attribute inode is in the cache, it is just returned with an |
| 216 | * increased reference count. Otherwise, a new struct inode is allocated and |
| 217 | * initialized, and finally ntfs_read_locked_attr_inode() is called to read the |
| 218 | * attribute and fill in the inode structure. |
| 219 | * |
| 220 | * Note, for index allocation attributes, you need to use ntfs_index_iget() |
| 221 | * instead of ntfs_attr_iget() as working with indices is a lot more complex. |
| 222 | * |
| 223 | * Return the struct inode of the attribute inode on success. Check the return |
| 224 | * value with IS_ERR() and if true, the function failed and the error code is |
| 225 | * obtained from PTR_ERR(). |
| 226 | */ |
| 227 | struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPE type, |
| 228 | ntfschar *name, u32 name_len) |
| 229 | { |
| 230 | struct inode *vi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | int err; |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 232 | ntfs_attr na; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | /* Make sure no one calls ntfs_attr_iget() for indices. */ |
| 235 | BUG_ON(type == AT_INDEX_ALLOCATION); |
| 236 | |
| 237 | na.mft_no = base_vi->i_ino; |
| 238 | na.type = type; |
| 239 | na.name = name; |
| 240 | na.name_len = name_len; |
| 241 | |
| 242 | vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode, |
| 243 | (set_t)ntfs_init_locked_inode, &na); |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 244 | if (unlikely(!vi)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | return ERR_PTR(-ENOMEM); |
| 246 | |
| 247 | err = 0; |
| 248 | |
| 249 | /* If this is a freshly allocated inode, need to read it now. */ |
| 250 | if (vi->i_state & I_NEW) { |
| 251 | err = ntfs_read_locked_attr_inode(base_vi, vi); |
| 252 | unlock_new_inode(vi); |
| 253 | } |
| 254 | /* |
| 255 | * There is no point in keeping bad attribute inodes around. This also |
| 256 | * simplifies things in that we never need to check for bad attribute |
| 257 | * inodes elsewhere. |
| 258 | */ |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 259 | if (unlikely(err)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | iput(vi); |
| 261 | vi = ERR_PTR(err); |
| 262 | } |
| 263 | return vi; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * ntfs_index_iget - obtain a struct inode corresponding to an index |
| 268 | * @base_vi: vfs base inode containing the index related attributes |
| 269 | * @name: Unicode name of the index |
| 270 | * @name_len: length of @name in Unicode characters |
| 271 | * |
| 272 | * Obtain the (fake) struct inode corresponding to the index specified by @name |
| 273 | * and @name_len, which is present in the base mft record specified by the vfs |
| 274 | * inode @base_vi. |
| 275 | * |
| 276 | * If the index inode is in the cache, it is just returned with an increased |
| 277 | * reference count. Otherwise, a new struct inode is allocated and |
| 278 | * initialized, and finally ntfs_read_locked_index_inode() is called to read |
| 279 | * the index related attributes and fill in the inode structure. |
| 280 | * |
| 281 | * Return the struct inode of the index inode on success. Check the return |
| 282 | * value with IS_ERR() and if true, the function failed and the error code is |
| 283 | * obtained from PTR_ERR(). |
| 284 | */ |
| 285 | struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name, |
| 286 | u32 name_len) |
| 287 | { |
| 288 | struct inode *vi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | int err; |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 290 | ntfs_attr na; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | na.mft_no = base_vi->i_ino; |
| 293 | na.type = AT_INDEX_ALLOCATION; |
| 294 | na.name = name; |
| 295 | na.name_len = name_len; |
| 296 | |
| 297 | vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode, |
| 298 | (set_t)ntfs_init_locked_inode, &na); |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 299 | if (unlikely(!vi)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | return ERR_PTR(-ENOMEM); |
| 301 | |
| 302 | err = 0; |
| 303 | |
| 304 | /* If this is a freshly allocated inode, need to read it now. */ |
| 305 | if (vi->i_state & I_NEW) { |
| 306 | err = ntfs_read_locked_index_inode(base_vi, vi); |
| 307 | unlock_new_inode(vi); |
| 308 | } |
| 309 | /* |
| 310 | * There is no point in keeping bad index inodes around. This also |
| 311 | * simplifies things in that we never need to check for bad index |
| 312 | * inodes elsewhere. |
| 313 | */ |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 314 | if (unlikely(err)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | iput(vi); |
| 316 | vi = ERR_PTR(err); |
| 317 | } |
| 318 | return vi; |
| 319 | } |
| 320 | |
| 321 | struct inode *ntfs_alloc_big_inode(struct super_block *sb) |
| 322 | { |
| 323 | ntfs_inode *ni; |
| 324 | |
| 325 | ntfs_debug("Entering."); |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 326 | ni = kmem_cache_alloc(ntfs_big_inode_cache, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | if (likely(ni != NULL)) { |
| 328 | ni->state = 0; |
| 329 | return VFS_I(ni); |
| 330 | } |
| 331 | ntfs_error(sb, "Allocation of NTFS big inode structure failed."); |
| 332 | return NULL; |
| 333 | } |
| 334 | |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 335 | static void ntfs_i_callback(struct rcu_head *head) |
| 336 | { |
| 337 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 338 | INIT_LIST_HEAD(&inode->i_dentry); |
| 339 | kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode)); |
| 340 | } |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | void ntfs_destroy_big_inode(struct inode *inode) |
| 343 | { |
| 344 | ntfs_inode *ni = NTFS_I(inode); |
| 345 | |
| 346 | ntfs_debug("Entering."); |
| 347 | BUG_ON(ni->page); |
| 348 | if (!atomic_dec_and_test(&ni->count)) |
| 349 | BUG(); |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 350 | call_rcu(&inode->i_rcu, ntfs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | static inline ntfs_inode *ntfs_alloc_extent_inode(void) |
| 354 | { |
| 355 | ntfs_inode *ni; |
| 356 | |
| 357 | ntfs_debug("Entering."); |
Christoph Lameter | e6b4f8d | 2006-12-06 20:33:14 -0800 | [diff] [blame] | 358 | ni = kmem_cache_alloc(ntfs_inode_cache, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | if (likely(ni != NULL)) { |
| 360 | ni->state = 0; |
| 361 | return ni; |
| 362 | } |
| 363 | ntfs_error(NULL, "Allocation of NTFS inode structure failed."); |
| 364 | return NULL; |
| 365 | } |
| 366 | |
| 367 | static void ntfs_destroy_extent_inode(ntfs_inode *ni) |
| 368 | { |
| 369 | ntfs_debug("Entering."); |
| 370 | BUG_ON(ni->page); |
| 371 | if (!atomic_dec_and_test(&ni->count)) |
| 372 | BUG(); |
| 373 | kmem_cache_free(ntfs_inode_cache, ni); |
| 374 | } |
| 375 | |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 376 | /* |
| 377 | * The attribute runlist lock has separate locking rules from the |
| 378 | * normal runlist lock, so split the two lock-classes: |
| 379 | */ |
| 380 | static struct lock_class_key attr_list_rl_lock_class; |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /** |
| 383 | * __ntfs_init_inode - initialize ntfs specific part of an inode |
| 384 | * @sb: super block of mounted volume |
| 385 | * @ni: freshly allocated ntfs inode which to initialize |
| 386 | * |
| 387 | * Initialize an ntfs inode to defaults. |
| 388 | * |
| 389 | * NOTE: ni->mft_no, ni->state, ni->type, ni->name, and ni->name_len are left |
| 390 | * untouched. Make sure to initialize them elsewhere. |
| 391 | * |
| 392 | * Return zero on success and -ENOMEM on error. |
| 393 | */ |
| 394 | void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni) |
| 395 | { |
| 396 | ntfs_debug("Entering."); |
Anton Altaparmakov | 3676367 | 2004-11-18 13:46:45 +0000 | [diff] [blame] | 397 | rwlock_init(&ni->size_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | ni->initialized_size = ni->allocated_size = 0; |
| 399 | ni->seq_no = 0; |
| 400 | atomic_set(&ni->count, 1); |
| 401 | ni->vol = NTFS_SB(sb); |
| 402 | ntfs_init_runlist(&ni->runlist); |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 403 | mutex_init(&ni->mrec_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | ni->page = NULL; |
| 405 | ni->page_ofs = 0; |
| 406 | ni->attr_list_size = 0; |
| 407 | ni->attr_list = NULL; |
| 408 | ntfs_init_runlist(&ni->attr_list_rl); |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 409 | lockdep_set_class(&ni->attr_list_rl.lock, |
| 410 | &attr_list_rl_lock_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | ni->itype.index.block_size = 0; |
| 412 | ni->itype.index.vcn_size = 0; |
| 413 | ni->itype.index.collation_rule = 0; |
| 414 | ni->itype.index.block_size_bits = 0; |
| 415 | ni->itype.index.vcn_size_bits = 0; |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 416 | mutex_init(&ni->extent_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | ni->nr_extents = 0; |
| 418 | ni->ext.base_ntfs_ino = NULL; |
| 419 | } |
| 420 | |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 421 | /* |
| 422 | * Extent inodes get MFT-mapped in a nested way, while the base inode |
| 423 | * is still mapped. Teach this nesting to the lock validator by creating |
| 424 | * a separate class for nested inode's mrec_lock's: |
| 425 | */ |
| 426 | static struct lock_class_key extent_inode_mrec_lock_key; |
| 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb, |
| 429 | unsigned long mft_no) |
| 430 | { |
| 431 | ntfs_inode *ni = ntfs_alloc_extent_inode(); |
| 432 | |
| 433 | ntfs_debug("Entering."); |
| 434 | if (likely(ni != NULL)) { |
| 435 | __ntfs_init_inode(sb, ni); |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 436 | lockdep_set_class(&ni->mrec_lock, &extent_inode_mrec_lock_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | ni->mft_no = mft_no; |
| 438 | ni->type = AT_UNUSED; |
| 439 | ni->name = NULL; |
| 440 | ni->name_len = 0; |
| 441 | } |
| 442 | return ni; |
| 443 | } |
| 444 | |
| 445 | /** |
| 446 | * ntfs_is_extended_system_file - check if a file is in the $Extend directory |
| 447 | * @ctx: initialized attribute search context |
| 448 | * |
| 449 | * Search all file name attributes in the inode described by the attribute |
| 450 | * search context @ctx and check if any of the names are in the $Extend system |
| 451 | * directory. |
| 452 | * |
| 453 | * Return values: |
| 454 | * 1: file is in $Extend directory |
| 455 | * 0: file is not in $Extend directory |
| 456 | * -errno: failed to determine if the file is in the $Extend directory |
| 457 | */ |
| 458 | static int ntfs_is_extended_system_file(ntfs_attr_search_ctx *ctx) |
| 459 | { |
| 460 | int nr_links, err; |
| 461 | |
| 462 | /* Restart search. */ |
| 463 | ntfs_attr_reinit_search_ctx(ctx); |
| 464 | |
| 465 | /* Get number of hard links. */ |
| 466 | nr_links = le16_to_cpu(ctx->mrec->link_count); |
| 467 | |
| 468 | /* Loop through all hard links. */ |
| 469 | while (!(err = ntfs_attr_lookup(AT_FILE_NAME, NULL, 0, 0, 0, NULL, 0, |
| 470 | ctx))) { |
| 471 | FILE_NAME_ATTR *file_name_attr; |
| 472 | ATTR_RECORD *attr = ctx->attr; |
| 473 | u8 *p, *p2; |
| 474 | |
| 475 | nr_links--; |
| 476 | /* |
| 477 | * Maximum sanity checking as we are called on an inode that |
| 478 | * we suspect might be corrupt. |
| 479 | */ |
| 480 | p = (u8*)attr + le32_to_cpu(attr->length); |
| 481 | if (p < (u8*)ctx->mrec || (u8*)p > (u8*)ctx->mrec + |
| 482 | le32_to_cpu(ctx->mrec->bytes_in_use)) { |
| 483 | err_corrupt_attr: |
| 484 | ntfs_error(ctx->ntfs_ino->vol->sb, "Corrupt file name " |
| 485 | "attribute. You should run chkdsk."); |
| 486 | return -EIO; |
| 487 | } |
| 488 | if (attr->non_resident) { |
| 489 | ntfs_error(ctx->ntfs_ino->vol->sb, "Non-resident file " |
| 490 | "name. You should run chkdsk."); |
| 491 | return -EIO; |
| 492 | } |
| 493 | if (attr->flags) { |
| 494 | ntfs_error(ctx->ntfs_ino->vol->sb, "File name with " |
| 495 | "invalid flags. You should run " |
| 496 | "chkdsk."); |
| 497 | return -EIO; |
| 498 | } |
| 499 | if (!(attr->data.resident.flags & RESIDENT_ATTR_IS_INDEXED)) { |
| 500 | ntfs_error(ctx->ntfs_ino->vol->sb, "Unindexed file " |
| 501 | "name. You should run chkdsk."); |
| 502 | return -EIO; |
| 503 | } |
| 504 | file_name_attr = (FILE_NAME_ATTR*)((u8*)attr + |
| 505 | le16_to_cpu(attr->data.resident.value_offset)); |
| 506 | p2 = (u8*)attr + le32_to_cpu(attr->data.resident.value_length); |
| 507 | if (p2 < (u8*)attr || p2 > p) |
| 508 | goto err_corrupt_attr; |
| 509 | /* This attribute is ok, but is it in the $Extend directory? */ |
| 510 | if (MREF_LE(file_name_attr->parent_directory) == FILE_Extend) |
| 511 | return 1; /* YES, it's an extended system file. */ |
| 512 | } |
| 513 | if (unlikely(err != -ENOENT)) |
| 514 | return err; |
| 515 | if (unlikely(nr_links)) { |
| 516 | ntfs_error(ctx->ntfs_ino->vol->sb, "Inode hard link count " |
| 517 | "doesn't match number of name attributes. You " |
| 518 | "should run chkdsk."); |
| 519 | return -EIO; |
| 520 | } |
| 521 | return 0; /* NO, it is not an extended system file. */ |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * ntfs_read_locked_inode - read an inode from its device |
| 526 | * @vi: inode to read |
| 527 | * |
| 528 | * ntfs_read_locked_inode() is called from ntfs_iget() to read the inode |
| 529 | * described by @vi into memory from the device. |
| 530 | * |
| 531 | * The only fields in @vi that we need to/can look at when the function is |
| 532 | * called are i_sb, pointing to the mounted device's super block, and i_ino, |
| 533 | * the number of the inode to load. |
| 534 | * |
| 535 | * ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino |
| 536 | * for reading and sets up the necessary @vi fields as well as initializing |
| 537 | * the ntfs inode. |
| 538 | * |
| 539 | * Q: What locks are held when the function is called? |
Christoph Hellwig | eaff807 | 2009-12-17 14:25:01 +0100 | [diff] [blame] | 540 | * A: i_state has I_NEW set, hence the inode is locked, also |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | * i_count is set to 1, so it is not going to go away |
| 542 | * i_flags is set to 0 and we have no business touching it. Only an ioctl() |
| 543 | * is allowed to write to them. We should of course be honouring them but |
| 544 | * we need to do that using the IS_* macros defined in include/linux/fs.h. |
| 545 | * In any case ntfs_read_locked_inode() has nothing to do with i_flags. |
| 546 | * |
| 547 | * Return 0 on success and -errno on error. In the error case, the inode will |
| 548 | * have had make_bad_inode() executed on it. |
| 549 | */ |
| 550 | static int ntfs_read_locked_inode(struct inode *vi) |
| 551 | { |
| 552 | ntfs_volume *vol = NTFS_SB(vi->i_sb); |
| 553 | ntfs_inode *ni; |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 554 | struct inode *bvi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | MFT_RECORD *m; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 556 | ATTR_RECORD *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | STANDARD_INFORMATION *si; |
| 558 | ntfs_attr_search_ctx *ctx; |
| 559 | int err = 0; |
| 560 | |
| 561 | ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino); |
| 562 | |
| 563 | /* Setup the generic vfs inode parts now. */ |
| 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | /* |
| 566 | * This is for checking whether an inode has changed w.r.t. a file so |
| 567 | * that the file can be updated if necessary (compare with f_version). |
| 568 | */ |
| 569 | vi->i_version = 1; |
| 570 | |
| 571 | vi->i_uid = vol->uid; |
| 572 | vi->i_gid = vol->gid; |
| 573 | vi->i_mode = 0; |
| 574 | |
| 575 | /* |
| 576 | * Initialize the ntfs specific part of @vi special casing |
| 577 | * FILE_MFT which we need to do at mount time. |
| 578 | */ |
| 579 | if (vi->i_ino != FILE_MFT) |
| 580 | ntfs_init_big_inode(vi); |
| 581 | ni = NTFS_I(vi); |
| 582 | |
| 583 | m = map_mft_record(ni); |
| 584 | if (IS_ERR(m)) { |
| 585 | err = PTR_ERR(m); |
| 586 | goto err_out; |
| 587 | } |
| 588 | ctx = ntfs_attr_get_search_ctx(ni, m); |
| 589 | if (!ctx) { |
| 590 | err = -ENOMEM; |
| 591 | goto unm_err_out; |
| 592 | } |
| 593 | |
| 594 | if (!(m->flags & MFT_RECORD_IN_USE)) { |
| 595 | ntfs_error(vi->i_sb, "Inode is not in use!"); |
| 596 | goto unm_err_out; |
| 597 | } |
| 598 | if (m->base_mft_record) { |
| 599 | ntfs_error(vi->i_sb, "Inode is an extent inode!"); |
| 600 | goto unm_err_out; |
| 601 | } |
| 602 | |
| 603 | /* Transfer information from mft record into vfs and ntfs inodes. */ |
| 604 | vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number); |
| 605 | |
| 606 | /* |
| 607 | * FIXME: Keep in mind that link_count is two for files which have both |
| 608 | * a long file name and a short file name as separate entries, so if |
| 609 | * we are hiding short file names this will be too high. Either we need |
| 610 | * to account for the short file names by subtracting them or we need |
| 611 | * to make sure we delete files even though i_nlink is not zero which |
| 612 | * might be tricky due to vfs interactions. Need to think about this |
| 613 | * some more when implementing the unlink command. |
| 614 | */ |
| 615 | vi->i_nlink = le16_to_cpu(m->link_count); |
| 616 | /* |
| 617 | * FIXME: Reparse points can have the directory bit set even though |
| 618 | * they would be S_IFLNK. Need to deal with this further below when we |
| 619 | * implement reparse points / symbolic links but it will do for now. |
| 620 | * Also if not a directory, it could be something else, rather than |
| 621 | * a regular file. But again, will do for now. |
| 622 | */ |
| 623 | /* Everyone gets all permissions. */ |
| 624 | vi->i_mode |= S_IRWXUGO; |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 625 | /* If read-only, no one gets write permissions. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | if (IS_RDONLY(vi)) |
| 627 | vi->i_mode &= ~S_IWUGO; |
| 628 | if (m->flags & MFT_RECORD_IS_DIRECTORY) { |
| 629 | vi->i_mode |= S_IFDIR; |
| 630 | /* |
| 631 | * Apply the directory permissions mask set in the mount |
| 632 | * options. |
| 633 | */ |
| 634 | vi->i_mode &= ~vol->dmask; |
| 635 | /* Things break without this kludge! */ |
| 636 | if (vi->i_nlink > 1) |
| 637 | vi->i_nlink = 1; |
| 638 | } else { |
| 639 | vi->i_mode |= S_IFREG; |
| 640 | /* Apply the file permissions mask set in the mount options. */ |
| 641 | vi->i_mode &= ~vol->fmask; |
| 642 | } |
| 643 | /* |
| 644 | * Find the standard information attribute in the mft record. At this |
| 645 | * stage we haven't setup the attribute list stuff yet, so this could |
| 646 | * in fact fail if the standard information is in an extent record, but |
| 647 | * I don't think this actually ever happens. |
| 648 | */ |
| 649 | err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0, 0, 0, NULL, 0, |
| 650 | ctx); |
| 651 | if (unlikely(err)) { |
| 652 | if (err == -ENOENT) { |
| 653 | /* |
| 654 | * TODO: We should be performing a hot fix here (if the |
| 655 | * recover mount option is set) by creating a new |
| 656 | * attribute. |
| 657 | */ |
| 658 | ntfs_error(vi->i_sb, "$STANDARD_INFORMATION attribute " |
| 659 | "is missing."); |
| 660 | } |
| 661 | goto unm_err_out; |
| 662 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 663 | a = ctx->attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | /* Get the standard information attribute value. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 665 | si = (STANDARD_INFORMATION*)((u8*)a + |
| 666 | le16_to_cpu(a->data.resident.value_offset)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
| 668 | /* Transfer information from the standard information into vi. */ |
| 669 | /* |
| 670 | * Note: The i_?times do not quite map perfectly onto the NTFS times, |
| 671 | * but they are close enough, and in the end it doesn't really matter |
| 672 | * that much... |
| 673 | */ |
| 674 | /* |
| 675 | * mtime is the last change of the data within the file. Not changed |
| 676 | * when only metadata is changed, e.g. a rename doesn't affect mtime. |
| 677 | */ |
| 678 | vi->i_mtime = ntfs2utc(si->last_data_change_time); |
| 679 | /* |
| 680 | * ctime is the last change of the metadata of the file. This obviously |
| 681 | * always changes, when mtime is changed. ctime can be changed on its |
| 682 | * own, mtime is then not changed, e.g. when a file is renamed. |
| 683 | */ |
| 684 | vi->i_ctime = ntfs2utc(si->last_mft_change_time); |
| 685 | /* |
| 686 | * Last access to the data within the file. Not changed during a rename |
| 687 | * for example but changed whenever the file is written to. |
| 688 | */ |
| 689 | vi->i_atime = ntfs2utc(si->last_access_time); |
| 690 | |
| 691 | /* Find the attribute list attribute if present. */ |
| 692 | ntfs_attr_reinit_search_ctx(ctx); |
| 693 | err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx); |
| 694 | if (err) { |
| 695 | if (unlikely(err != -ENOENT)) { |
| 696 | ntfs_error(vi->i_sb, "Failed to lookup attribute list " |
| 697 | "attribute."); |
| 698 | goto unm_err_out; |
| 699 | } |
| 700 | } else /* if (!err) */ { |
| 701 | if (vi->i_ino == FILE_MFT) |
| 702 | goto skip_attr_list_load; |
| 703 | ntfs_debug("Attribute list found in inode 0x%lx.", vi->i_ino); |
| 704 | NInoSetAttrList(ni); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 705 | a = ctx->attr; |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 706 | if (a->flags & ATTR_COMPRESSION_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | ntfs_error(vi->i_sb, "Attribute list attribute is " |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 708 | "compressed."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | goto unm_err_out; |
| 710 | } |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 711 | if (a->flags & ATTR_IS_ENCRYPTED || |
| 712 | a->flags & ATTR_IS_SPARSE) { |
| 713 | if (a->non_resident) { |
| 714 | ntfs_error(vi->i_sb, "Non-resident attribute " |
| 715 | "list attribute is encrypted/" |
| 716 | "sparse."); |
| 717 | goto unm_err_out; |
| 718 | } |
| 719 | ntfs_warning(vi->i_sb, "Resident attribute list " |
| 720 | "attribute in inode 0x%lx is marked " |
| 721 | "encrypted/sparse which is not true. " |
| 722 | "However, Windows allows this and " |
| 723 | "chkdsk does not detect or correct it " |
| 724 | "so we will just ignore the invalid " |
| 725 | "flags and pretend they are not set.", |
| 726 | vi->i_ino); |
| 727 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | /* Now allocate memory for the attribute list. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 729 | ni->attr_list_size = (u32)ntfs_attr_size(a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size); |
| 731 | if (!ni->attr_list) { |
| 732 | ntfs_error(vi->i_sb, "Not enough memory to allocate " |
| 733 | "buffer for attribute list."); |
| 734 | err = -ENOMEM; |
| 735 | goto unm_err_out; |
| 736 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 737 | if (a->non_resident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | NInoSetAttrListNonResident(ni); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 739 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | ntfs_error(vi->i_sb, "Attribute list has non " |
| 741 | "zero lowest_vcn."); |
| 742 | goto unm_err_out; |
| 743 | } |
| 744 | /* |
| 745 | * Setup the runlist. No need for locking as we have |
| 746 | * exclusive access to the inode at this time. |
| 747 | */ |
| 748 | ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol, |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 749 | a, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | if (IS_ERR(ni->attr_list_rl.rl)) { |
| 751 | err = PTR_ERR(ni->attr_list_rl.rl); |
| 752 | ni->attr_list_rl.rl = NULL; |
| 753 | ntfs_error(vi->i_sb, "Mapping pairs " |
| 754 | "decompression failed."); |
| 755 | goto unm_err_out; |
| 756 | } |
| 757 | /* Now load the attribute list. */ |
| 758 | if ((err = load_attribute_list(vol, &ni->attr_list_rl, |
| 759 | ni->attr_list, ni->attr_list_size, |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 760 | sle64_to_cpu(a->data.non_resident. |
| 761 | initialized_size)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | ntfs_error(vi->i_sb, "Failed to load " |
| 763 | "attribute list attribute."); |
| 764 | goto unm_err_out; |
| 765 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 766 | } else /* if (!a->non_resident) */ { |
| 767 | if ((u8*)a + le16_to_cpu(a->data.resident.value_offset) |
| 768 | + le32_to_cpu( |
| 769 | a->data.resident.value_length) > |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | (u8*)ctx->mrec + vol->mft_record_size) { |
| 771 | ntfs_error(vi->i_sb, "Corrupt attribute list " |
| 772 | "in inode."); |
| 773 | goto unm_err_out; |
| 774 | } |
| 775 | /* Now copy the attribute list. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 776 | memcpy(ni->attr_list, (u8*)a + le16_to_cpu( |
| 777 | a->data.resident.value_offset), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | le32_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 779 | a->data.resident.value_length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | } |
| 781 | } |
| 782 | skip_attr_list_load: |
| 783 | /* |
| 784 | * If an attribute list is present we now have the attribute list value |
| 785 | * in ntfs_ino->attr_list and it is ntfs_ino->attr_list_size bytes. |
| 786 | */ |
| 787 | if (S_ISDIR(vi->i_mode)) { |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 788 | loff_t bvi_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | ntfs_inode *bni; |
| 790 | INDEX_ROOT *ir; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 791 | u8 *ir_end, *index_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
| 793 | /* It is a directory, find index root attribute. */ |
| 794 | ntfs_attr_reinit_search_ctx(ctx); |
| 795 | err = ntfs_attr_lookup(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE, |
| 796 | 0, NULL, 0, ctx); |
| 797 | if (unlikely(err)) { |
| 798 | if (err == -ENOENT) { |
| 799 | // FIXME: File is corrupt! Hot-fix with empty |
| 800 | // index root attribute if recovery option is |
| 801 | // set. |
| 802 | ntfs_error(vi->i_sb, "$INDEX_ROOT attribute " |
| 803 | "is missing."); |
| 804 | } |
| 805 | goto unm_err_out; |
| 806 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 807 | a = ctx->attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | /* Set up the state. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 809 | if (unlikely(a->non_resident)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | ntfs_error(vol->sb, "$INDEX_ROOT attribute is not " |
| 811 | "resident."); |
| 812 | goto unm_err_out; |
| 813 | } |
| 814 | /* Ensure the attribute name is placed before the value. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 815 | if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >= |
| 816 | le16_to_cpu(a->data.resident.value_offset)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | ntfs_error(vol->sb, "$INDEX_ROOT attribute name is " |
| 818 | "placed after the attribute value."); |
| 819 | goto unm_err_out; |
| 820 | } |
| 821 | /* |
| 822 | * Compressed/encrypted index root just means that the newly |
| 823 | * created files in that directory should be created compressed/ |
| 824 | * encrypted. However index root cannot be both compressed and |
| 825 | * encrypted. |
| 826 | */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 827 | if (a->flags & ATTR_COMPRESSION_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | NInoSetCompressed(ni); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 829 | if (a->flags & ATTR_IS_ENCRYPTED) { |
| 830 | if (a->flags & ATTR_COMPRESSION_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | ntfs_error(vi->i_sb, "Found encrypted and " |
| 832 | "compressed attribute."); |
| 833 | goto unm_err_out; |
| 834 | } |
| 835 | NInoSetEncrypted(ni); |
| 836 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 837 | if (a->flags & ATTR_IS_SPARSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | NInoSetSparse(ni); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 839 | ir = (INDEX_ROOT*)((u8*)a + |
| 840 | le16_to_cpu(a->data.resident.value_offset)); |
| 841 | ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length); |
| 842 | if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is " |
| 844 | "corrupt."); |
| 845 | goto unm_err_out; |
| 846 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 847 | index_end = (u8*)&ir->index + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | le32_to_cpu(ir->index.index_length); |
| 849 | if (index_end > ir_end) { |
| 850 | ntfs_error(vi->i_sb, "Directory index is corrupt."); |
| 851 | goto unm_err_out; |
| 852 | } |
| 853 | if (ir->type != AT_FILE_NAME) { |
| 854 | ntfs_error(vi->i_sb, "Indexed attribute is not " |
| 855 | "$FILE_NAME."); |
| 856 | goto unm_err_out; |
| 857 | } |
| 858 | if (ir->collation_rule != COLLATION_FILE_NAME) { |
| 859 | ntfs_error(vi->i_sb, "Index collation rule is not " |
| 860 | "COLLATION_FILE_NAME."); |
| 861 | goto unm_err_out; |
| 862 | } |
| 863 | ni->itype.index.collation_rule = ir->collation_rule; |
| 864 | ni->itype.index.block_size = le32_to_cpu(ir->index_block_size); |
| 865 | if (ni->itype.index.block_size & |
| 866 | (ni->itype.index.block_size - 1)) { |
| 867 | ntfs_error(vi->i_sb, "Index block size (%u) is not a " |
| 868 | "power of two.", |
| 869 | ni->itype.index.block_size); |
| 870 | goto unm_err_out; |
| 871 | } |
| 872 | if (ni->itype.index.block_size > PAGE_CACHE_SIZE) { |
| 873 | ntfs_error(vi->i_sb, "Index block size (%u) > " |
| 874 | "PAGE_CACHE_SIZE (%ld) is not " |
| 875 | "supported. Sorry.", |
| 876 | ni->itype.index.block_size, |
| 877 | PAGE_CACHE_SIZE); |
| 878 | err = -EOPNOTSUPP; |
| 879 | goto unm_err_out; |
| 880 | } |
| 881 | if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) { |
| 882 | ntfs_error(vi->i_sb, "Index block size (%u) < " |
| 883 | "NTFS_BLOCK_SIZE (%i) is not " |
| 884 | "supported. Sorry.", |
| 885 | ni->itype.index.block_size, |
| 886 | NTFS_BLOCK_SIZE); |
| 887 | err = -EOPNOTSUPP; |
| 888 | goto unm_err_out; |
| 889 | } |
| 890 | ni->itype.index.block_size_bits = |
| 891 | ffs(ni->itype.index.block_size) - 1; |
| 892 | /* Determine the size of a vcn in the directory index. */ |
| 893 | if (vol->cluster_size <= ni->itype.index.block_size) { |
| 894 | ni->itype.index.vcn_size = vol->cluster_size; |
| 895 | ni->itype.index.vcn_size_bits = vol->cluster_size_bits; |
| 896 | } else { |
| 897 | ni->itype.index.vcn_size = vol->sector_size; |
| 898 | ni->itype.index.vcn_size_bits = vol->sector_size_bits; |
| 899 | } |
| 900 | |
| 901 | /* Setup the index allocation attribute, even if not present. */ |
| 902 | NInoSetMstProtected(ni); |
| 903 | ni->type = AT_INDEX_ALLOCATION; |
| 904 | ni->name = I30; |
| 905 | ni->name_len = 4; |
| 906 | |
| 907 | if (!(ir->index.flags & LARGE_INDEX)) { |
| 908 | /* No index allocation. */ |
| 909 | vi->i_size = ni->initialized_size = |
| 910 | ni->allocated_size = 0; |
| 911 | /* We are done with the mft record, so we release it. */ |
| 912 | ntfs_attr_put_search_ctx(ctx); |
| 913 | unmap_mft_record(ni); |
| 914 | m = NULL; |
| 915 | ctx = NULL; |
| 916 | goto skip_large_dir_stuff; |
| 917 | } /* LARGE_INDEX: Index allocation present. Setup state. */ |
| 918 | NInoSetIndexAllocPresent(ni); |
| 919 | /* Find index allocation attribute. */ |
| 920 | ntfs_attr_reinit_search_ctx(ctx); |
| 921 | err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, I30, 4, |
| 922 | CASE_SENSITIVE, 0, NULL, 0, ctx); |
| 923 | if (unlikely(err)) { |
| 924 | if (err == -ENOENT) |
| 925 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION " |
| 926 | "attribute is not present but " |
| 927 | "$INDEX_ROOT indicated it is."); |
| 928 | else |
| 929 | ntfs_error(vi->i_sb, "Failed to lookup " |
| 930 | "$INDEX_ALLOCATION " |
| 931 | "attribute."); |
| 932 | goto unm_err_out; |
| 933 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 934 | a = ctx->attr; |
| 935 | if (!a->non_resident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute " |
| 937 | "is resident."); |
| 938 | goto unm_err_out; |
| 939 | } |
| 940 | /* |
| 941 | * Ensure the attribute name is placed before the mapping pairs |
| 942 | * array. |
| 943 | */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 944 | if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >= |
| 945 | le16_to_cpu( |
| 946 | a->data.non_resident.mapping_pairs_offset)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name " |
| 948 | "is placed after the mapping pairs " |
| 949 | "array."); |
| 950 | goto unm_err_out; |
| 951 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 952 | if (a->flags & ATTR_IS_ENCRYPTED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute " |
| 954 | "is encrypted."); |
| 955 | goto unm_err_out; |
| 956 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 957 | if (a->flags & ATTR_IS_SPARSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute " |
| 959 | "is sparse."); |
| 960 | goto unm_err_out; |
| 961 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 962 | if (a->flags & ATTR_COMPRESSION_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute " |
| 964 | "is compressed."); |
| 965 | goto unm_err_out; |
| 966 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 967 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | ntfs_error(vi->i_sb, "First extent of " |
| 969 | "$INDEX_ALLOCATION attribute has non " |
| 970 | "zero lowest_vcn."); |
| 971 | goto unm_err_out; |
| 972 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 973 | vi->i_size = sle64_to_cpu(a->data.non_resident.data_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | ni->initialized_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 975 | a->data.non_resident.initialized_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | ni->allocated_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 977 | a->data.non_resident.allocated_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | /* |
| 979 | * We are done with the mft record, so we release it. Otherwise |
| 980 | * we would deadlock in ntfs_attr_iget(). |
| 981 | */ |
| 982 | ntfs_attr_put_search_ctx(ctx); |
| 983 | unmap_mft_record(ni); |
| 984 | m = NULL; |
| 985 | ctx = NULL; |
| 986 | /* Get the index bitmap attribute inode. */ |
| 987 | bvi = ntfs_attr_iget(vi, AT_BITMAP, I30, 4); |
| 988 | if (IS_ERR(bvi)) { |
| 989 | ntfs_error(vi->i_sb, "Failed to get bitmap attribute."); |
| 990 | err = PTR_ERR(bvi); |
| 991 | goto unm_err_out; |
| 992 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | bni = NTFS_I(bvi); |
| 994 | if (NInoCompressed(bni) || NInoEncrypted(bni) || |
| 995 | NInoSparse(bni)) { |
| 996 | ntfs_error(vi->i_sb, "$BITMAP attribute is compressed " |
| 997 | "and/or encrypted and/or sparse."); |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 998 | goto iput_unm_err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | /* Consistency check bitmap size vs. index allocation size. */ |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 1001 | bvi_size = i_size_read(bvi); |
| 1002 | if ((bvi_size << 3) < (vi->i_size >> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | ni->itype.index.block_size_bits)) { |
| 1004 | ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) " |
| 1005 | "for index allocation (0x%llx).", |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 1006 | bvi_size << 3, vi->i_size); |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 1007 | goto iput_unm_err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 1009 | /* No longer need the bitmap attribute inode. */ |
| 1010 | iput(bvi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | skip_large_dir_stuff: |
| 1012 | /* Setup the operations for this inode. */ |
| 1013 | vi->i_op = &ntfs_dir_inode_ops; |
| 1014 | vi->i_fop = &ntfs_dir_ops; |
| 1015 | } else { |
| 1016 | /* It is a file. */ |
| 1017 | ntfs_attr_reinit_search_ctx(ctx); |
| 1018 | |
| 1019 | /* Setup the data attribute, even if not present. */ |
| 1020 | ni->type = AT_DATA; |
| 1021 | ni->name = NULL; |
| 1022 | ni->name_len = 0; |
| 1023 | |
| 1024 | /* Find first extent of the unnamed data attribute. */ |
| 1025 | err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx); |
| 1026 | if (unlikely(err)) { |
| 1027 | vi->i_size = ni->initialized_size = |
| 1028 | ni->allocated_size = 0; |
| 1029 | if (err != -ENOENT) { |
| 1030 | ntfs_error(vi->i_sb, "Failed to lookup $DATA " |
| 1031 | "attribute."); |
| 1032 | goto unm_err_out; |
| 1033 | } |
| 1034 | /* |
| 1035 | * FILE_Secure does not have an unnamed $DATA |
| 1036 | * attribute, so we special case it here. |
| 1037 | */ |
| 1038 | if (vi->i_ino == FILE_Secure) |
| 1039 | goto no_data_attr_special_case; |
| 1040 | /* |
| 1041 | * Most if not all the system files in the $Extend |
| 1042 | * system directory do not have unnamed data |
| 1043 | * attributes so we need to check if the parent |
| 1044 | * directory of the file is FILE_Extend and if it is |
| 1045 | * ignore this error. To do this we need to get the |
| 1046 | * name of this inode from the mft record as the name |
| 1047 | * contains the back reference to the parent directory. |
| 1048 | */ |
| 1049 | if (ntfs_is_extended_system_file(ctx) > 0) |
| 1050 | goto no_data_attr_special_case; |
| 1051 | // FIXME: File is corrupt! Hot-fix with empty data |
| 1052 | // attribute if recovery option is set. |
| 1053 | ntfs_error(vi->i_sb, "$DATA attribute is missing."); |
| 1054 | goto unm_err_out; |
| 1055 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1056 | a = ctx->attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | /* Setup the state. */ |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1058 | if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) { |
| 1059 | if (a->flags & ATTR_COMPRESSION_MASK) { |
| 1060 | NInoSetCompressed(ni); |
| 1061 | if (vol->cluster_size > 4096) { |
| 1062 | ntfs_error(vi->i_sb, "Found " |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1063 | "compressed data but " |
| 1064 | "compression is " |
| 1065 | "disabled due to " |
| 1066 | "cluster size (%i) > " |
| 1067 | "4kiB.", |
| 1068 | vol->cluster_size); |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1069 | goto unm_err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | } |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1071 | if ((a->flags & ATTR_COMPRESSION_MASK) |
| 1072 | != ATTR_IS_COMPRESSED) { |
| 1073 | ntfs_error(vi->i_sb, "Found unknown " |
| 1074 | "compression method " |
| 1075 | "or corrupt file."); |
| 1076 | goto unm_err_out; |
| 1077 | } |
| 1078 | } |
| 1079 | if (a->flags & ATTR_IS_SPARSE) |
| 1080 | NInoSetSparse(ni); |
| 1081 | } |
| 1082 | if (a->flags & ATTR_IS_ENCRYPTED) { |
| 1083 | if (NInoCompressed(ni)) { |
| 1084 | ntfs_error(vi->i_sb, "Found encrypted and " |
| 1085 | "compressed data."); |
| 1086 | goto unm_err_out; |
| 1087 | } |
| 1088 | NInoSetEncrypted(ni); |
| 1089 | } |
| 1090 | if (a->non_resident) { |
| 1091 | NInoSetNonResident(ni); |
| 1092 | if (NInoCompressed(ni) || NInoSparse(ni)) { |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 1093 | if (NInoCompressed(ni) && a->data.non_resident. |
| 1094 | compression_unit != 4) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | ntfs_error(vi->i_sb, "Found " |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 1096 | "non-standard " |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1097 | "compression unit (%u " |
| 1098 | "instead of 4). " |
| 1099 | "Cannot handle this.", |
| 1100 | a->data.non_resident. |
| 1101 | compression_unit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | err = -EOPNOTSUPP; |
| 1103 | goto unm_err_out; |
| 1104 | } |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 1105 | if (a->data.non_resident.compression_unit) { |
| 1106 | ni->itype.compressed.block_size = 1U << |
| 1107 | (a->data.non_resident. |
| 1108 | compression_unit + |
| 1109 | vol->cluster_size_bits); |
| 1110 | ni->itype.compressed.block_size_bits = |
| 1111 | ffs(ni->itype. |
| 1112 | compressed. |
| 1113 | block_size) - 1; |
| 1114 | ni->itype.compressed.block_clusters = |
| 1115 | 1U << a->data. |
| 1116 | non_resident. |
| 1117 | compression_unit; |
| 1118 | } else { |
| 1119 | ni->itype.compressed.block_size = 0; |
| 1120 | ni->itype.compressed.block_size_bits = |
| 1121 | 0; |
| 1122 | ni->itype.compressed.block_clusters = |
| 1123 | 0; |
| 1124 | } |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1125 | ni->itype.compressed.size = sle64_to_cpu( |
| 1126 | a->data.non_resident. |
| 1127 | compressed_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1129 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | ntfs_error(vi->i_sb, "First extent of $DATA " |
| 1131 | "attribute has non zero " |
| 1132 | "lowest_vcn."); |
| 1133 | goto unm_err_out; |
| 1134 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | vi->i_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1136 | a->data.non_resident.data_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | ni->initialized_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1138 | a->data.non_resident.initialized_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | ni->allocated_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1140 | a->data.non_resident.allocated_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | } else { /* Resident attribute. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1142 | vi->i_size = ni->initialized_size = le32_to_cpu( |
| 1143 | a->data.resident.value_length); |
| 1144 | ni->allocated_size = le32_to_cpu(a->length) - |
| 1145 | le16_to_cpu( |
| 1146 | a->data.resident.value_offset); |
| 1147 | if (vi->i_size > ni->allocated_size) { |
| 1148 | ntfs_error(vi->i_sb, "Resident data attribute " |
| 1149 | "is corrupt (size exceeds " |
| 1150 | "allocation)."); |
| 1151 | goto unm_err_out; |
| 1152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | } |
| 1154 | no_data_attr_special_case: |
| 1155 | /* We are done with the mft record, so we release it. */ |
| 1156 | ntfs_attr_put_search_ctx(ctx); |
| 1157 | unmap_mft_record(ni); |
| 1158 | m = NULL; |
| 1159 | ctx = NULL; |
| 1160 | /* Setup the operations for this inode. */ |
| 1161 | vi->i_op = &ntfs_file_inode_ops; |
| 1162 | vi->i_fop = &ntfs_file_ops; |
| 1163 | } |
| 1164 | if (NInoMstProtected(ni)) |
| 1165 | vi->i_mapping->a_ops = &ntfs_mst_aops; |
| 1166 | else |
| 1167 | vi->i_mapping->a_ops = &ntfs_aops; |
| 1168 | /* |
| 1169 | * The number of 512-byte blocks used on disk (for stat). This is in so |
| 1170 | * far inaccurate as it doesn't account for any named streams or other |
| 1171 | * special non-resident attributes, but that is how Windows works, too, |
| 1172 | * so we are at least consistent with Windows, if not entirely |
| 1173 | * consistent with the Linux Way. Doing it the Linux Way would cause a |
| 1174 | * significant slowdown as it would involve iterating over all |
| 1175 | * attributes in the mft record and adding the allocated/compressed |
| 1176 | * sizes of all non-resident attributes present to give us the Linux |
| 1177 | * correct size that should go into i_blocks (after division by 512). |
| 1178 | */ |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1179 | if (S_ISREG(vi->i_mode) && (NInoCompressed(ni) || NInoSparse(ni))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | vi->i_blocks = ni->itype.compressed.size >> 9; |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1181 | else |
| 1182 | vi->i_blocks = ni->allocated_size >> 9; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | ntfs_debug("Done."); |
| 1184 | return 0; |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 1185 | iput_unm_err_out: |
| 1186 | iput(bvi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | unm_err_out: |
| 1188 | if (!err) |
| 1189 | err = -EIO; |
| 1190 | if (ctx) |
| 1191 | ntfs_attr_put_search_ctx(ctx); |
| 1192 | if (m) |
| 1193 | unmap_mft_record(ni); |
| 1194 | err_out: |
| 1195 | ntfs_error(vol->sb, "Failed with error code %i. Marking corrupt " |
| 1196 | "inode 0x%lx as bad. Run chkdsk.", err, vi->i_ino); |
| 1197 | make_bad_inode(vi); |
| 1198 | if (err != -EOPNOTSUPP && err != -ENOMEM) |
| 1199 | NVolSetErrors(vol); |
| 1200 | return err; |
| 1201 | } |
| 1202 | |
| 1203 | /** |
| 1204 | * ntfs_read_locked_attr_inode - read an attribute inode from its base inode |
| 1205 | * @base_vi: base inode |
| 1206 | * @vi: attribute inode to read |
| 1207 | * |
| 1208 | * ntfs_read_locked_attr_inode() is called from ntfs_attr_iget() to read the |
| 1209 | * attribute inode described by @vi into memory from the base mft record |
| 1210 | * described by @base_ni. |
| 1211 | * |
| 1212 | * ntfs_read_locked_attr_inode() maps, pins and locks the base inode for |
| 1213 | * reading and looks up the attribute described by @vi before setting up the |
| 1214 | * necessary fields in @vi as well as initializing the ntfs inode. |
| 1215 | * |
| 1216 | * Q: What locks are held when the function is called? |
Christoph Hellwig | eaff807 | 2009-12-17 14:25:01 +0100 | [diff] [blame] | 1217 | * A: i_state has I_NEW set, hence the inode is locked, also |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | * i_count is set to 1, so it is not going to go away |
| 1219 | * |
| 1220 | * Return 0 on success and -errno on error. In the error case, the inode will |
| 1221 | * have had make_bad_inode() executed on it. |
Anton Altaparmakov | f6098cf | 2005-09-19 09:41:39 +0100 | [diff] [blame] | 1222 | * |
| 1223 | * Note this cannot be called for AT_INDEX_ALLOCATION. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | */ |
| 1225 | static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi) |
| 1226 | { |
| 1227 | ntfs_volume *vol = NTFS_SB(vi->i_sb); |
| 1228 | ntfs_inode *ni, *base_ni; |
| 1229 | MFT_RECORD *m; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1230 | ATTR_RECORD *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | ntfs_attr_search_ctx *ctx; |
| 1232 | int err = 0; |
| 1233 | |
| 1234 | ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino); |
| 1235 | |
| 1236 | ntfs_init_big_inode(vi); |
| 1237 | |
| 1238 | ni = NTFS_I(vi); |
| 1239 | base_ni = NTFS_I(base_vi); |
| 1240 | |
| 1241 | /* Just mirror the values from the base inode. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | vi->i_version = base_vi->i_version; |
| 1243 | vi->i_uid = base_vi->i_uid; |
| 1244 | vi->i_gid = base_vi->i_gid; |
| 1245 | vi->i_nlink = base_vi->i_nlink; |
| 1246 | vi->i_mtime = base_vi->i_mtime; |
| 1247 | vi->i_ctime = base_vi->i_ctime; |
| 1248 | vi->i_atime = base_vi->i_atime; |
| 1249 | vi->i_generation = ni->seq_no = base_ni->seq_no; |
| 1250 | |
| 1251 | /* Set inode type to zero but preserve permissions. */ |
| 1252 | vi->i_mode = base_vi->i_mode & ~S_IFMT; |
| 1253 | |
| 1254 | m = map_mft_record(base_ni); |
| 1255 | if (IS_ERR(m)) { |
| 1256 | err = PTR_ERR(m); |
| 1257 | goto err_out; |
| 1258 | } |
| 1259 | ctx = ntfs_attr_get_search_ctx(base_ni, m); |
| 1260 | if (!ctx) { |
| 1261 | err = -ENOMEM; |
| 1262 | goto unm_err_out; |
| 1263 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | /* Find the attribute. */ |
| 1265 | err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, |
| 1266 | CASE_SENSITIVE, 0, NULL, 0, ctx); |
| 1267 | if (unlikely(err)) |
| 1268 | goto unm_err_out; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1269 | a = ctx->attr; |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1270 | if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) { |
| 1271 | if (a->flags & ATTR_COMPRESSION_MASK) { |
| 1272 | NInoSetCompressed(ni); |
| 1273 | if ((ni->type != AT_DATA) || (ni->type == AT_DATA && |
| 1274 | ni->name_len)) { |
| 1275 | ntfs_error(vi->i_sb, "Found compressed " |
| 1276 | "non-data or named data " |
| 1277 | "attribute. Please report " |
| 1278 | "you saw this message to " |
| 1279 | "linux-ntfs-dev@lists." |
| 1280 | "sourceforge.net"); |
| 1281 | goto unm_err_out; |
| 1282 | } |
| 1283 | if (vol->cluster_size > 4096) { |
| 1284 | ntfs_error(vi->i_sb, "Found compressed " |
| 1285 | "attribute but compression is " |
| 1286 | "disabled due to cluster size " |
| 1287 | "(%i) > 4kiB.", |
| 1288 | vol->cluster_size); |
| 1289 | goto unm_err_out; |
| 1290 | } |
| 1291 | if ((a->flags & ATTR_COMPRESSION_MASK) != |
| 1292 | ATTR_IS_COMPRESSED) { |
| 1293 | ntfs_error(vi->i_sb, "Found unknown " |
| 1294 | "compression method."); |
| 1295 | goto unm_err_out; |
| 1296 | } |
| 1297 | } |
| 1298 | /* |
Anton Altaparmakov | f6098cf | 2005-09-19 09:41:39 +0100 | [diff] [blame] | 1299 | * The compressed/sparse flag set in an index root just means |
| 1300 | * to compress all files. |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1301 | */ |
| 1302 | if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) { |
| 1303 | ntfs_error(vi->i_sb, "Found mst protected attribute " |
| 1304 | "but the attribute is %s. Please " |
| 1305 | "report you saw this message to " |
| 1306 | "linux-ntfs-dev@lists.sourceforge.net", |
| 1307 | NInoCompressed(ni) ? "compressed" : |
| 1308 | "sparse"); |
| 1309 | goto unm_err_out; |
| 1310 | } |
| 1311 | if (a->flags & ATTR_IS_SPARSE) |
| 1312 | NInoSetSparse(ni); |
| 1313 | } |
| 1314 | if (a->flags & ATTR_IS_ENCRYPTED) { |
| 1315 | if (NInoCompressed(ni)) { |
| 1316 | ntfs_error(vi->i_sb, "Found encrypted and compressed " |
| 1317 | "data."); |
| 1318 | goto unm_err_out; |
| 1319 | } |
| 1320 | /* |
| 1321 | * The encryption flag set in an index root just means to |
| 1322 | * encrypt all files. |
| 1323 | */ |
| 1324 | if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) { |
| 1325 | ntfs_error(vi->i_sb, "Found mst protected attribute " |
| 1326 | "but the attribute is encrypted. " |
| 1327 | "Please report you saw this message " |
| 1328 | "to linux-ntfs-dev@lists.sourceforge." |
| 1329 | "net"); |
| 1330 | goto unm_err_out; |
| 1331 | } |
| 1332 | if (ni->type != AT_DATA) { |
| 1333 | ntfs_error(vi->i_sb, "Found encrypted non-data " |
| 1334 | "attribute."); |
| 1335 | goto unm_err_out; |
| 1336 | } |
| 1337 | NInoSetEncrypted(ni); |
| 1338 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1339 | if (!a->non_resident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | /* Ensure the attribute name is placed before the value. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1341 | if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >= |
| 1342 | le16_to_cpu(a->data.resident.value_offset)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | ntfs_error(vol->sb, "Attribute name is placed after " |
| 1344 | "the attribute value."); |
| 1345 | goto unm_err_out; |
| 1346 | } |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1347 | if (NInoMstProtected(ni)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | ntfs_error(vi->i_sb, "Found mst protected attribute " |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1349 | "but the attribute is resident. " |
| 1350 | "Please report you saw this message to " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | "linux-ntfs-dev@lists.sourceforge.net"); |
| 1352 | goto unm_err_out; |
| 1353 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1354 | vi->i_size = ni->initialized_size = le32_to_cpu( |
| 1355 | a->data.resident.value_length); |
| 1356 | ni->allocated_size = le32_to_cpu(a->length) - |
| 1357 | le16_to_cpu(a->data.resident.value_offset); |
| 1358 | if (vi->i_size > ni->allocated_size) { |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1359 | ntfs_error(vi->i_sb, "Resident attribute is corrupt " |
| 1360 | "(size exceeds allocation)."); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1361 | goto unm_err_out; |
| 1362 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | } else { |
| 1364 | NInoSetNonResident(ni); |
| 1365 | /* |
| 1366 | * Ensure the attribute name is placed before the mapping pairs |
| 1367 | * array. |
| 1368 | */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1369 | if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >= |
| 1370 | le16_to_cpu( |
| 1371 | a->data.non_resident.mapping_pairs_offset)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | ntfs_error(vol->sb, "Attribute name is placed after " |
| 1373 | "the mapping pairs array."); |
| 1374 | goto unm_err_out; |
| 1375 | } |
Anton Altaparmakov | f6098cf | 2005-09-19 09:41:39 +0100 | [diff] [blame] | 1376 | if (NInoCompressed(ni) || NInoSparse(ni)) { |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 1377 | if (NInoCompressed(ni) && a->data.non_resident. |
| 1378 | compression_unit != 4) { |
| 1379 | ntfs_error(vi->i_sb, "Found non-standard " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | "compression unit (%u instead " |
| 1381 | "of 4). Cannot handle this.", |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1382 | a->data.non_resident. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | compression_unit); |
| 1384 | err = -EOPNOTSUPP; |
| 1385 | goto unm_err_out; |
| 1386 | } |
Anton Altaparmakov | a0646a1 | 2006-03-23 15:53:03 +0000 | [diff] [blame] | 1387 | if (a->data.non_resident.compression_unit) { |
| 1388 | ni->itype.compressed.block_size = 1U << |
| 1389 | (a->data.non_resident. |
| 1390 | compression_unit + |
| 1391 | vol->cluster_size_bits); |
| 1392 | ni->itype.compressed.block_size_bits = |
| 1393 | ffs(ni->itype.compressed. |
| 1394 | block_size) - 1; |
| 1395 | ni->itype.compressed.block_clusters = 1U << |
| 1396 | a->data.non_resident. |
| 1397 | compression_unit; |
| 1398 | } else { |
| 1399 | ni->itype.compressed.block_size = 0; |
| 1400 | ni->itype.compressed.block_size_bits = 0; |
| 1401 | ni->itype.compressed.block_clusters = 0; |
| 1402 | } |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1403 | ni->itype.compressed.size = sle64_to_cpu( |
| 1404 | a->data.non_resident.compressed_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1406 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | ntfs_error(vi->i_sb, "First extent of attribute has " |
| 1408 | "non-zero lowest_vcn."); |
| 1409 | goto unm_err_out; |
| 1410 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1411 | vi->i_size = sle64_to_cpu(a->data.non_resident.data_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | ni->initialized_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1413 | a->data.non_resident.initialized_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | ni->allocated_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1415 | a->data.non_resident.allocated_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | if (NInoMstProtected(ni)) |
| 1418 | vi->i_mapping->a_ops = &ntfs_mst_aops; |
| 1419 | else |
| 1420 | vi->i_mapping->a_ops = &ntfs_aops; |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1421 | if ((NInoCompressed(ni) || NInoSparse(ni)) && ni->type != AT_INDEX_ROOT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | vi->i_blocks = ni->itype.compressed.size >> 9; |
Anton Altaparmakov | 9451f85 | 2005-03-03 14:43:43 +0000 | [diff] [blame] | 1423 | else |
| 1424 | vi->i_blocks = ni->allocated_size >> 9; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | /* |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1426 | * Make sure the base inode does not go away and attach it to the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | * attribute inode. |
| 1428 | */ |
| 1429 | igrab(base_vi); |
| 1430 | ni->ext.base_ntfs_ino = base_ni; |
| 1431 | ni->nr_extents = -1; |
| 1432 | |
| 1433 | ntfs_attr_put_search_ctx(ctx); |
| 1434 | unmap_mft_record(base_ni); |
| 1435 | |
| 1436 | ntfs_debug("Done."); |
| 1437 | return 0; |
| 1438 | |
| 1439 | unm_err_out: |
| 1440 | if (!err) |
| 1441 | err = -EIO; |
| 1442 | if (ctx) |
| 1443 | ntfs_attr_put_search_ctx(ctx); |
| 1444 | unmap_mft_record(base_ni); |
| 1445 | err_out: |
| 1446 | ntfs_error(vol->sb, "Failed with error code %i while reading attribute " |
| 1447 | "inode (mft_no 0x%lx, type 0x%x, name_len %i). " |
| 1448 | "Marking corrupt inode and base inode 0x%lx as bad. " |
| 1449 | "Run chkdsk.", err, vi->i_ino, ni->type, ni->name_len, |
| 1450 | base_vi->i_ino); |
| 1451 | make_bad_inode(vi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | if (err != -ENOMEM) |
| 1453 | NVolSetErrors(vol); |
| 1454 | return err; |
| 1455 | } |
| 1456 | |
| 1457 | /** |
| 1458 | * ntfs_read_locked_index_inode - read an index inode from its base inode |
| 1459 | * @base_vi: base inode |
| 1460 | * @vi: index inode to read |
| 1461 | * |
| 1462 | * ntfs_read_locked_index_inode() is called from ntfs_index_iget() to read the |
| 1463 | * index inode described by @vi into memory from the base mft record described |
| 1464 | * by @base_ni. |
| 1465 | * |
| 1466 | * ntfs_read_locked_index_inode() maps, pins and locks the base inode for |
| 1467 | * reading and looks up the attributes relating to the index described by @vi |
| 1468 | * before setting up the necessary fields in @vi as well as initializing the |
| 1469 | * ntfs inode. |
| 1470 | * |
| 1471 | * Note, index inodes are essentially attribute inodes (NInoAttr() is true) |
| 1472 | * with the attribute type set to AT_INDEX_ALLOCATION. Apart from that, they |
| 1473 | * are setup like directory inodes since directories are a special case of |
| 1474 | * indices ao they need to be treated in much the same way. Most importantly, |
| 1475 | * for small indices the index allocation attribute might not actually exist. |
| 1476 | * However, the index root attribute always exists but this does not need to |
| 1477 | * have an inode associated with it and this is why we define a new inode type |
| 1478 | * index. Also, like for directories, we need to have an attribute inode for |
| 1479 | * the bitmap attribute corresponding to the index allocation attribute and we |
| 1480 | * can store this in the appropriate field of the inode, just like we do for |
| 1481 | * normal directory inodes. |
| 1482 | * |
| 1483 | * Q: What locks are held when the function is called? |
Christoph Hellwig | eaff807 | 2009-12-17 14:25:01 +0100 | [diff] [blame] | 1484 | * A: i_state has I_NEW set, hence the inode is locked, also |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | * i_count is set to 1, so it is not going to go away |
| 1486 | * |
| 1487 | * Return 0 on success and -errno on error. In the error case, the inode will |
| 1488 | * have had make_bad_inode() executed on it. |
| 1489 | */ |
| 1490 | static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi) |
| 1491 | { |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 1492 | loff_t bvi_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | ntfs_volume *vol = NTFS_SB(vi->i_sb); |
| 1494 | ntfs_inode *ni, *base_ni, *bni; |
| 1495 | struct inode *bvi; |
| 1496 | MFT_RECORD *m; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1497 | ATTR_RECORD *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | ntfs_attr_search_ctx *ctx; |
| 1499 | INDEX_ROOT *ir; |
| 1500 | u8 *ir_end, *index_end; |
| 1501 | int err = 0; |
| 1502 | |
| 1503 | ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino); |
| 1504 | ntfs_init_big_inode(vi); |
| 1505 | ni = NTFS_I(vi); |
| 1506 | base_ni = NTFS_I(base_vi); |
| 1507 | /* Just mirror the values from the base inode. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | vi->i_version = base_vi->i_version; |
| 1509 | vi->i_uid = base_vi->i_uid; |
| 1510 | vi->i_gid = base_vi->i_gid; |
| 1511 | vi->i_nlink = base_vi->i_nlink; |
| 1512 | vi->i_mtime = base_vi->i_mtime; |
| 1513 | vi->i_ctime = base_vi->i_ctime; |
| 1514 | vi->i_atime = base_vi->i_atime; |
| 1515 | vi->i_generation = ni->seq_no = base_ni->seq_no; |
| 1516 | /* Set inode type to zero but preserve permissions. */ |
| 1517 | vi->i_mode = base_vi->i_mode & ~S_IFMT; |
| 1518 | /* Map the mft record for the base inode. */ |
| 1519 | m = map_mft_record(base_ni); |
| 1520 | if (IS_ERR(m)) { |
| 1521 | err = PTR_ERR(m); |
| 1522 | goto err_out; |
| 1523 | } |
| 1524 | ctx = ntfs_attr_get_search_ctx(base_ni, m); |
| 1525 | if (!ctx) { |
| 1526 | err = -ENOMEM; |
| 1527 | goto unm_err_out; |
| 1528 | } |
| 1529 | /* Find the index root attribute. */ |
| 1530 | err = ntfs_attr_lookup(AT_INDEX_ROOT, ni->name, ni->name_len, |
| 1531 | CASE_SENSITIVE, 0, NULL, 0, ctx); |
| 1532 | if (unlikely(err)) { |
| 1533 | if (err == -ENOENT) |
| 1534 | ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is " |
| 1535 | "missing."); |
| 1536 | goto unm_err_out; |
| 1537 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1538 | a = ctx->attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | /* Set up the state. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1540 | if (unlikely(a->non_resident)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | ntfs_error(vol->sb, "$INDEX_ROOT attribute is not resident."); |
| 1542 | goto unm_err_out; |
| 1543 | } |
| 1544 | /* Ensure the attribute name is placed before the value. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1545 | if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >= |
| 1546 | le16_to_cpu(a->data.resident.value_offset)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | ntfs_error(vol->sb, "$INDEX_ROOT attribute name is placed " |
| 1548 | "after the attribute value."); |
| 1549 | goto unm_err_out; |
| 1550 | } |
Anton Altaparmakov | 67bb103 | 2005-09-08 21:19:45 +0100 | [diff] [blame] | 1551 | /* |
| 1552 | * Compressed/encrypted/sparse index root is not allowed, except for |
| 1553 | * directories of course but those are not dealt with here. |
| 1554 | */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1555 | if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | ATTR_IS_SPARSE)) { |
| 1557 | ntfs_error(vi->i_sb, "Found compressed/encrypted/sparse index " |
| 1558 | "root attribute."); |
| 1559 | goto unm_err_out; |
| 1560 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1561 | ir = (INDEX_ROOT*)((u8*)a + le16_to_cpu(a->data.resident.value_offset)); |
| 1562 | ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) { |
| 1564 | ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is corrupt."); |
| 1565 | goto unm_err_out; |
| 1566 | } |
| 1567 | index_end = (u8*)&ir->index + le32_to_cpu(ir->index.index_length); |
| 1568 | if (index_end > ir_end) { |
| 1569 | ntfs_error(vi->i_sb, "Index is corrupt."); |
| 1570 | goto unm_err_out; |
| 1571 | } |
| 1572 | if (ir->type) { |
| 1573 | ntfs_error(vi->i_sb, "Index type is not 0 (type is 0x%x).", |
| 1574 | le32_to_cpu(ir->type)); |
| 1575 | goto unm_err_out; |
| 1576 | } |
| 1577 | ni->itype.index.collation_rule = ir->collation_rule; |
| 1578 | ntfs_debug("Index collation rule is 0x%x.", |
| 1579 | le32_to_cpu(ir->collation_rule)); |
| 1580 | ni->itype.index.block_size = le32_to_cpu(ir->index_block_size); |
Robert P. J. Day | 02d5341 | 2009-06-16 15:33:35 -0700 | [diff] [blame] | 1581 | if (!is_power_of_2(ni->itype.index.block_size)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | ntfs_error(vi->i_sb, "Index block size (%u) is not a power of " |
| 1583 | "two.", ni->itype.index.block_size); |
| 1584 | goto unm_err_out; |
| 1585 | } |
| 1586 | if (ni->itype.index.block_size > PAGE_CACHE_SIZE) { |
| 1587 | ntfs_error(vi->i_sb, "Index block size (%u) > PAGE_CACHE_SIZE " |
| 1588 | "(%ld) is not supported. Sorry.", |
| 1589 | ni->itype.index.block_size, PAGE_CACHE_SIZE); |
| 1590 | err = -EOPNOTSUPP; |
| 1591 | goto unm_err_out; |
| 1592 | } |
| 1593 | if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) { |
| 1594 | ntfs_error(vi->i_sb, "Index block size (%u) < NTFS_BLOCK_SIZE " |
| 1595 | "(%i) is not supported. Sorry.", |
| 1596 | ni->itype.index.block_size, NTFS_BLOCK_SIZE); |
| 1597 | err = -EOPNOTSUPP; |
| 1598 | goto unm_err_out; |
| 1599 | } |
| 1600 | ni->itype.index.block_size_bits = ffs(ni->itype.index.block_size) - 1; |
| 1601 | /* Determine the size of a vcn in the index. */ |
| 1602 | if (vol->cluster_size <= ni->itype.index.block_size) { |
| 1603 | ni->itype.index.vcn_size = vol->cluster_size; |
| 1604 | ni->itype.index.vcn_size_bits = vol->cluster_size_bits; |
| 1605 | } else { |
| 1606 | ni->itype.index.vcn_size = vol->sector_size; |
| 1607 | ni->itype.index.vcn_size_bits = vol->sector_size_bits; |
| 1608 | } |
| 1609 | /* Check for presence of index allocation attribute. */ |
| 1610 | if (!(ir->index.flags & LARGE_INDEX)) { |
| 1611 | /* No index allocation. */ |
| 1612 | vi->i_size = ni->initialized_size = ni->allocated_size = 0; |
| 1613 | /* We are done with the mft record, so we release it. */ |
| 1614 | ntfs_attr_put_search_ctx(ctx); |
| 1615 | unmap_mft_record(base_ni); |
| 1616 | m = NULL; |
| 1617 | ctx = NULL; |
| 1618 | goto skip_large_index_stuff; |
| 1619 | } /* LARGE_INDEX: Index allocation present. Setup state. */ |
| 1620 | NInoSetIndexAllocPresent(ni); |
| 1621 | /* Find index allocation attribute. */ |
| 1622 | ntfs_attr_reinit_search_ctx(ctx); |
| 1623 | err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, ni->name, ni->name_len, |
| 1624 | CASE_SENSITIVE, 0, NULL, 0, ctx); |
| 1625 | if (unlikely(err)) { |
| 1626 | if (err == -ENOENT) |
| 1627 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is " |
| 1628 | "not present but $INDEX_ROOT " |
| 1629 | "indicated it is."); |
| 1630 | else |
| 1631 | ntfs_error(vi->i_sb, "Failed to lookup " |
| 1632 | "$INDEX_ALLOCATION attribute."); |
| 1633 | goto unm_err_out; |
| 1634 | } |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 1635 | a = ctx->attr; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1636 | if (!a->non_resident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is " |
| 1638 | "resident."); |
| 1639 | goto unm_err_out; |
| 1640 | } |
| 1641 | /* |
| 1642 | * Ensure the attribute name is placed before the mapping pairs array. |
| 1643 | */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1644 | if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >= |
| 1645 | le16_to_cpu( |
| 1646 | a->data.non_resident.mapping_pairs_offset)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name is " |
| 1648 | "placed after the mapping pairs array."); |
| 1649 | goto unm_err_out; |
| 1650 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1651 | if (a->flags & ATTR_IS_ENCRYPTED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is " |
| 1653 | "encrypted."); |
| 1654 | goto unm_err_out; |
| 1655 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1656 | if (a->flags & ATTR_IS_SPARSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is sparse."); |
| 1658 | goto unm_err_out; |
| 1659 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1660 | if (a->flags & ATTR_COMPRESSION_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is " |
| 1662 | "compressed."); |
| 1663 | goto unm_err_out; |
| 1664 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1665 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | ntfs_error(vi->i_sb, "First extent of $INDEX_ALLOCATION " |
| 1667 | "attribute has non zero lowest_vcn."); |
| 1668 | goto unm_err_out; |
| 1669 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1670 | vi->i_size = sle64_to_cpu(a->data.non_resident.data_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | ni->initialized_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1672 | a->data.non_resident.initialized_size); |
| 1673 | ni->allocated_size = sle64_to_cpu(a->data.non_resident.allocated_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | /* |
| 1675 | * We are done with the mft record, so we release it. Otherwise |
| 1676 | * we would deadlock in ntfs_attr_iget(). |
| 1677 | */ |
| 1678 | ntfs_attr_put_search_ctx(ctx); |
| 1679 | unmap_mft_record(base_ni); |
| 1680 | m = NULL; |
| 1681 | ctx = NULL; |
| 1682 | /* Get the index bitmap attribute inode. */ |
| 1683 | bvi = ntfs_attr_iget(base_vi, AT_BITMAP, ni->name, ni->name_len); |
| 1684 | if (IS_ERR(bvi)) { |
| 1685 | ntfs_error(vi->i_sb, "Failed to get bitmap attribute."); |
| 1686 | err = PTR_ERR(bvi); |
| 1687 | goto unm_err_out; |
| 1688 | } |
| 1689 | bni = NTFS_I(bvi); |
| 1690 | if (NInoCompressed(bni) || NInoEncrypted(bni) || |
| 1691 | NInoSparse(bni)) { |
| 1692 | ntfs_error(vi->i_sb, "$BITMAP attribute is compressed and/or " |
| 1693 | "encrypted and/or sparse."); |
| 1694 | goto iput_unm_err_out; |
| 1695 | } |
| 1696 | /* Consistency check bitmap size vs. index allocation size. */ |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 1697 | bvi_size = i_size_read(bvi); |
| 1698 | if ((bvi_size << 3) < (vi->i_size >> ni->itype.index.block_size_bits)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) for " |
Anton Altaparmakov | f50f3ac | 2004-11-19 22:16:00 +0000 | [diff] [blame] | 1700 | "index allocation (0x%llx).", bvi_size << 3, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | vi->i_size); |
| 1702 | goto iput_unm_err_out; |
| 1703 | } |
Anton Altaparmakov | 8331191 | 2007-01-18 09:42:48 +0000 | [diff] [blame] | 1704 | iput(bvi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | skip_large_index_stuff: |
| 1706 | /* Setup the operations for this index inode. */ |
| 1707 | vi->i_op = NULL; |
| 1708 | vi->i_fop = NULL; |
| 1709 | vi->i_mapping->a_ops = &ntfs_mst_aops; |
| 1710 | vi->i_blocks = ni->allocated_size >> 9; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | /* |
| 1712 | * Make sure the base inode doesn't go away and attach it to the |
| 1713 | * index inode. |
| 1714 | */ |
| 1715 | igrab(base_vi); |
| 1716 | ni->ext.base_ntfs_ino = base_ni; |
| 1717 | ni->nr_extents = -1; |
| 1718 | |
| 1719 | ntfs_debug("Done."); |
| 1720 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | iput_unm_err_out: |
| 1722 | iput(bvi); |
| 1723 | unm_err_out: |
| 1724 | if (!err) |
| 1725 | err = -EIO; |
| 1726 | if (ctx) |
| 1727 | ntfs_attr_put_search_ctx(ctx); |
| 1728 | if (m) |
| 1729 | unmap_mft_record(base_ni); |
| 1730 | err_out: |
| 1731 | ntfs_error(vi->i_sb, "Failed with error code %i while reading index " |
| 1732 | "inode (mft_no 0x%lx, name_len %i.", err, vi->i_ino, |
| 1733 | ni->name_len); |
| 1734 | make_bad_inode(vi); |
| 1735 | if (err != -EOPNOTSUPP && err != -ENOMEM) |
| 1736 | NVolSetErrors(vol); |
| 1737 | return err; |
| 1738 | } |
| 1739 | |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 1740 | /* |
| 1741 | * The MFT inode has special locking, so teach the lock validator |
| 1742 | * about this by splitting off the locking rules of the MFT from |
| 1743 | * the locking rules of other inodes. The MFT inode can never be |
| 1744 | * accessed from the VFS side (or even internally), only by the |
| 1745 | * map_mft functions. |
| 1746 | */ |
| 1747 | static struct lock_class_key mft_ni_runlist_lock_key, mft_ni_mrec_lock_key; |
| 1748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | /** |
| 1750 | * ntfs_read_inode_mount - special read_inode for mount time use only |
| 1751 | * @vi: inode to read |
| 1752 | * |
| 1753 | * Read inode FILE_MFT at mount time, only called with super_block lock |
| 1754 | * held from within the read_super() code path. |
| 1755 | * |
| 1756 | * This function exists because when it is called the page cache for $MFT/$DATA |
| 1757 | * is not initialized and hence we cannot get at the contents of mft records |
| 1758 | * by calling map_mft_record*(). |
| 1759 | * |
| 1760 | * Further it needs to cope with the circular references problem, i.e. cannot |
| 1761 | * load any attributes other than $ATTRIBUTE_LIST until $DATA is loaded, because |
| 1762 | * we do not know where the other extent mft records are yet and again, because |
| 1763 | * we cannot call map_mft_record*() yet. Obviously this applies only when an |
| 1764 | * attribute list is actually present in $MFT inode. |
| 1765 | * |
| 1766 | * We solve these problems by starting with the $DATA attribute before anything |
| 1767 | * else and iterating using ntfs_attr_lookup($DATA) over all extents. As each |
| 1768 | * extent is found, we ntfs_mapping_pairs_decompress() including the implied |
| 1769 | * ntfs_runlists_merge(). Each step of the iteration necessarily provides |
| 1770 | * sufficient information for the next step to complete. |
| 1771 | * |
| 1772 | * This should work but there are two possible pit falls (see inline comments |
| 1773 | * below), but only time will tell if they are real pits or just smoke... |
| 1774 | */ |
| 1775 | int ntfs_read_inode_mount(struct inode *vi) |
| 1776 | { |
| 1777 | VCN next_vcn, last_vcn, highest_vcn; |
| 1778 | s64 block; |
| 1779 | struct super_block *sb = vi->i_sb; |
| 1780 | ntfs_volume *vol = NTFS_SB(sb); |
| 1781 | struct buffer_head *bh; |
| 1782 | ntfs_inode *ni; |
| 1783 | MFT_RECORD *m = NULL; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1784 | ATTR_RECORD *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | ntfs_attr_search_ctx *ctx; |
| 1786 | unsigned int i, nr_blocks; |
| 1787 | int err; |
| 1788 | |
| 1789 | ntfs_debug("Entering."); |
| 1790 | |
| 1791 | /* Initialize the ntfs specific part of @vi. */ |
| 1792 | ntfs_init_big_inode(vi); |
| 1793 | |
| 1794 | ni = NTFS_I(vi); |
| 1795 | |
| 1796 | /* Setup the data attribute. It is special as it is mst protected. */ |
| 1797 | NInoSetNonResident(ni); |
| 1798 | NInoSetMstProtected(ni); |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 1799 | NInoSetSparseDisabled(ni); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | ni->type = AT_DATA; |
| 1801 | ni->name = NULL; |
| 1802 | ni->name_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | /* |
| 1804 | * This sets up our little cheat allowing us to reuse the async read io |
| 1805 | * completion handler for directories. |
| 1806 | */ |
| 1807 | ni->itype.index.block_size = vol->mft_record_size; |
| 1808 | ni->itype.index.block_size_bits = vol->mft_record_size_bits; |
| 1809 | |
| 1810 | /* Very important! Needed to be able to call map_mft_record*(). */ |
| 1811 | vol->mft_ino = vi; |
| 1812 | |
| 1813 | /* Allocate enough memory to read the first mft record. */ |
| 1814 | if (vol->mft_record_size > 64 * 1024) { |
| 1815 | ntfs_error(sb, "Unsupported mft record size %i (max 64kiB).", |
| 1816 | vol->mft_record_size); |
| 1817 | goto err_out; |
| 1818 | } |
| 1819 | i = vol->mft_record_size; |
| 1820 | if (i < sb->s_blocksize) |
| 1821 | i = sb->s_blocksize; |
| 1822 | m = (MFT_RECORD*)ntfs_malloc_nofs(i); |
| 1823 | if (!m) { |
| 1824 | ntfs_error(sb, "Failed to allocate buffer for $MFT record 0."); |
| 1825 | goto err_out; |
| 1826 | } |
| 1827 | |
| 1828 | /* Determine the first block of the $MFT/$DATA attribute. */ |
| 1829 | block = vol->mft_lcn << vol->cluster_size_bits >> |
| 1830 | sb->s_blocksize_bits; |
| 1831 | nr_blocks = vol->mft_record_size >> sb->s_blocksize_bits; |
| 1832 | if (!nr_blocks) |
| 1833 | nr_blocks = 1; |
| 1834 | |
| 1835 | /* Load $MFT/$DATA's first mft record. */ |
| 1836 | for (i = 0; i < nr_blocks; i++) { |
| 1837 | bh = sb_bread(sb, block++); |
| 1838 | if (!bh) { |
| 1839 | ntfs_error(sb, "Device read failed."); |
| 1840 | goto err_out; |
| 1841 | } |
| 1842 | memcpy((char*)m + (i << sb->s_blocksize_bits), bh->b_data, |
| 1843 | sb->s_blocksize); |
| 1844 | brelse(bh); |
| 1845 | } |
| 1846 | |
| 1847 | /* Apply the mst fixups. */ |
| 1848 | if (post_read_mst_fixup((NTFS_RECORD*)m, vol->mft_record_size)) { |
| 1849 | /* FIXME: Try to use the $MFTMirr now. */ |
| 1850 | ntfs_error(sb, "MST fixup failed. $MFT is corrupt."); |
| 1851 | goto err_out; |
| 1852 | } |
| 1853 | |
| 1854 | /* Need this to sanity check attribute list references to $MFT. */ |
| 1855 | vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number); |
| 1856 | |
| 1857 | /* Provides readpage() and sync_page() for map_mft_record(). */ |
| 1858 | vi->i_mapping->a_ops = &ntfs_mst_aops; |
| 1859 | |
| 1860 | ctx = ntfs_attr_get_search_ctx(ni, m); |
| 1861 | if (!ctx) { |
| 1862 | err = -ENOMEM; |
| 1863 | goto err_out; |
| 1864 | } |
| 1865 | |
| 1866 | /* Find the attribute list attribute if present. */ |
| 1867 | err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx); |
| 1868 | if (err) { |
| 1869 | if (unlikely(err != -ENOENT)) { |
| 1870 | ntfs_error(sb, "Failed to lookup attribute list " |
| 1871 | "attribute. You should run chkdsk."); |
| 1872 | goto put_err_out; |
| 1873 | } |
| 1874 | } else /* if (!err) */ { |
| 1875 | ATTR_LIST_ENTRY *al_entry, *next_al_entry; |
| 1876 | u8 *al_end; |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 1877 | static const char *es = " Not allowed. $MFT is corrupt. " |
| 1878 | "You should run chkdsk."; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | |
| 1880 | ntfs_debug("Attribute list attribute found in $MFT."); |
| 1881 | NInoSetAttrList(ni); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1882 | a = ctx->attr; |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 1883 | if (a->flags & ATTR_COMPRESSION_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | ntfs_error(sb, "Attribute list attribute is " |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 1885 | "compressed.%s", es); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | goto put_err_out; |
| 1887 | } |
Anton Altaparmakov | 3672b63 | 2006-02-24 09:55:07 +0000 | [diff] [blame] | 1888 | if (a->flags & ATTR_IS_ENCRYPTED || |
| 1889 | a->flags & ATTR_IS_SPARSE) { |
| 1890 | if (a->non_resident) { |
| 1891 | ntfs_error(sb, "Non-resident attribute list " |
| 1892 | "attribute is encrypted/" |
| 1893 | "sparse.%s", es); |
| 1894 | goto put_err_out; |
| 1895 | } |
| 1896 | ntfs_warning(sb, "Resident attribute list attribute " |
| 1897 | "in $MFT system file is marked " |
| 1898 | "encrypted/sparse which is not true. " |
| 1899 | "However, Windows allows this and " |
| 1900 | "chkdsk does not detect or correct it " |
| 1901 | "so we will just ignore the invalid " |
| 1902 | "flags and pretend they are not set."); |
| 1903 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | /* Now allocate memory for the attribute list. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1905 | ni->attr_list_size = (u32)ntfs_attr_size(a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size); |
| 1907 | if (!ni->attr_list) { |
| 1908 | ntfs_error(sb, "Not enough memory to allocate buffer " |
| 1909 | "for attribute list."); |
| 1910 | goto put_err_out; |
| 1911 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1912 | if (a->non_resident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | NInoSetAttrListNonResident(ni); |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1914 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | ntfs_error(sb, "Attribute list has non zero " |
| 1916 | "lowest_vcn. $MFT is corrupt. " |
| 1917 | "You should run chkdsk."); |
| 1918 | goto put_err_out; |
| 1919 | } |
| 1920 | /* Setup the runlist. */ |
| 1921 | ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol, |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1922 | a, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | if (IS_ERR(ni->attr_list_rl.rl)) { |
| 1924 | err = PTR_ERR(ni->attr_list_rl.rl); |
| 1925 | ni->attr_list_rl.rl = NULL; |
| 1926 | ntfs_error(sb, "Mapping pairs decompression " |
| 1927 | "failed with error code %i.", |
| 1928 | -err); |
| 1929 | goto put_err_out; |
| 1930 | } |
| 1931 | /* Now load the attribute list. */ |
| 1932 | if ((err = load_attribute_list(vol, &ni->attr_list_rl, |
| 1933 | ni->attr_list, ni->attr_list_size, |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1934 | sle64_to_cpu(a->data. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | non_resident.initialized_size)))) { |
| 1936 | ntfs_error(sb, "Failed to load attribute list " |
| 1937 | "attribute with error code %i.", |
| 1938 | -err); |
| 1939 | goto put_err_out; |
| 1940 | } |
| 1941 | } else /* if (!ctx.attr->non_resident) */ { |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1942 | if ((u8*)a + le16_to_cpu( |
| 1943 | a->data.resident.value_offset) + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | le32_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1945 | a->data.resident.value_length) > |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | (u8*)ctx->mrec + vol->mft_record_size) { |
| 1947 | ntfs_error(sb, "Corrupt attribute list " |
| 1948 | "attribute."); |
| 1949 | goto put_err_out; |
| 1950 | } |
| 1951 | /* Now copy the attribute list. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1952 | memcpy(ni->attr_list, (u8*)a + le16_to_cpu( |
| 1953 | a->data.resident.value_offset), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | le32_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 1955 | a->data.resident.value_length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | } |
| 1957 | /* The attribute list is now setup in memory. */ |
| 1958 | /* |
| 1959 | * FIXME: I don't know if this case is actually possible. |
| 1960 | * According to logic it is not possible but I have seen too |
| 1961 | * many weird things in MS software to rely on logic... Thus we |
| 1962 | * perform a manual search and make sure the first $MFT/$DATA |
| 1963 | * extent is in the base inode. If it is not we abort with an |
| 1964 | * error and if we ever see a report of this error we will need |
| 1965 | * to do some magic in order to have the necessary mft record |
| 1966 | * loaded and in the right place in the page cache. But |
| 1967 | * hopefully logic will prevail and this never happens... |
| 1968 | */ |
| 1969 | al_entry = (ATTR_LIST_ENTRY*)ni->attr_list; |
| 1970 | al_end = (u8*)al_entry + ni->attr_list_size; |
| 1971 | for (;; al_entry = next_al_entry) { |
| 1972 | /* Out of bounds check. */ |
| 1973 | if ((u8*)al_entry < ni->attr_list || |
| 1974 | (u8*)al_entry > al_end) |
| 1975 | goto em_put_err_out; |
| 1976 | /* Catch the end of the attribute list. */ |
| 1977 | if ((u8*)al_entry == al_end) |
| 1978 | goto em_put_err_out; |
| 1979 | if (!al_entry->length) |
| 1980 | goto em_put_err_out; |
| 1981 | if ((u8*)al_entry + 6 > al_end || (u8*)al_entry + |
| 1982 | le16_to_cpu(al_entry->length) > al_end) |
| 1983 | goto em_put_err_out; |
| 1984 | next_al_entry = (ATTR_LIST_ENTRY*)((u8*)al_entry + |
| 1985 | le16_to_cpu(al_entry->length)); |
Harvey Harrison | 63cd885 | 2009-03-31 15:23:52 -0700 | [diff] [blame] | 1986 | if (le32_to_cpu(al_entry->type) > le32_to_cpu(AT_DATA)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | goto em_put_err_out; |
| 1988 | if (AT_DATA != al_entry->type) |
| 1989 | continue; |
| 1990 | /* We want an unnamed attribute. */ |
| 1991 | if (al_entry->name_length) |
| 1992 | goto em_put_err_out; |
| 1993 | /* Want the first entry, i.e. lowest_vcn == 0. */ |
| 1994 | if (al_entry->lowest_vcn) |
| 1995 | goto em_put_err_out; |
| 1996 | /* First entry has to be in the base mft record. */ |
| 1997 | if (MREF_LE(al_entry->mft_reference) != vi->i_ino) { |
| 1998 | /* MFT references do not match, logic fails. */ |
| 1999 | ntfs_error(sb, "BUG: The first $DATA extent " |
| 2000 | "of $MFT is not in the base " |
| 2001 | "mft record. Please report " |
| 2002 | "you saw this message to " |
| 2003 | "linux-ntfs-dev@lists." |
| 2004 | "sourceforge.net"); |
| 2005 | goto put_err_out; |
| 2006 | } else { |
| 2007 | /* Sequence numbers must match. */ |
| 2008 | if (MSEQNO_LE(al_entry->mft_reference) != |
| 2009 | ni->seq_no) |
| 2010 | goto em_put_err_out; |
| 2011 | /* Got it. All is ok. We can stop now. */ |
| 2012 | break; |
| 2013 | } |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | ntfs_attr_reinit_search_ctx(ctx); |
| 2018 | |
| 2019 | /* Now load all attribute extents. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2020 | a = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | next_vcn = last_vcn = highest_vcn = 0; |
| 2022 | while (!(err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, next_vcn, NULL, 0, |
| 2023 | ctx))) { |
| 2024 | runlist_element *nrl; |
| 2025 | |
| 2026 | /* Cache the current attribute. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2027 | a = ctx->attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | /* $MFT must be non-resident. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2029 | if (!a->non_resident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | ntfs_error(sb, "$MFT must be non-resident but a " |
| 2031 | "resident extent was found. $MFT is " |
| 2032 | "corrupt. Run chkdsk."); |
| 2033 | goto put_err_out; |
| 2034 | } |
| 2035 | /* $MFT must be uncompressed and unencrypted. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2036 | if (a->flags & ATTR_COMPRESSION_MASK || |
| 2037 | a->flags & ATTR_IS_ENCRYPTED || |
| 2038 | a->flags & ATTR_IS_SPARSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | ntfs_error(sb, "$MFT must be uncompressed, " |
| 2040 | "non-sparse, and unencrypted but a " |
| 2041 | "compressed/sparse/encrypted extent " |
| 2042 | "was found. $MFT is corrupt. Run " |
| 2043 | "chkdsk."); |
| 2044 | goto put_err_out; |
| 2045 | } |
| 2046 | /* |
| 2047 | * Decompress the mapping pairs array of this extent and merge |
| 2048 | * the result into the existing runlist. No need for locking |
| 2049 | * as we have exclusive access to the inode at this time and we |
| 2050 | * are a mount in progress task, too. |
| 2051 | */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2052 | nrl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | if (IS_ERR(nrl)) { |
| 2054 | ntfs_error(sb, "ntfs_mapping_pairs_decompress() " |
| 2055 | "failed with error code %ld. $MFT is " |
| 2056 | "corrupt.", PTR_ERR(nrl)); |
| 2057 | goto put_err_out; |
| 2058 | } |
| 2059 | ni->runlist.rl = nrl; |
| 2060 | |
| 2061 | /* Are we in the first extent? */ |
| 2062 | if (!next_vcn) { |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2063 | if (a->data.non_resident.lowest_vcn) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | ntfs_error(sb, "First extent of $DATA " |
| 2065 | "attribute has non zero " |
| 2066 | "lowest_vcn. $MFT is corrupt. " |
| 2067 | "You should run chkdsk."); |
| 2068 | goto put_err_out; |
| 2069 | } |
| 2070 | /* Get the last vcn in the $DATA attribute. */ |
| 2071 | last_vcn = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2072 | a->data.non_resident.allocated_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | >> vol->cluster_size_bits; |
| 2074 | /* Fill in the inode size. */ |
| 2075 | vi->i_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2076 | a->data.non_resident.data_size); |
| 2077 | ni->initialized_size = sle64_to_cpu( |
| 2078 | a->data.non_resident.initialized_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | ni->allocated_size = sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2080 | a->data.non_resident.allocated_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | /* |
| 2082 | * Verify the number of mft records does not exceed |
| 2083 | * 2^32 - 1. |
| 2084 | */ |
| 2085 | if ((vi->i_size >> vol->mft_record_size_bits) >= |
| 2086 | (1ULL << 32)) { |
| 2087 | ntfs_error(sb, "$MFT is too big! Aborting."); |
| 2088 | goto put_err_out; |
| 2089 | } |
| 2090 | /* |
| 2091 | * We have got the first extent of the runlist for |
| 2092 | * $MFT which means it is now relatively safe to call |
| 2093 | * the normal ntfs_read_inode() function. |
| 2094 | * Complete reading the inode, this will actually |
| 2095 | * re-read the mft record for $MFT, this time entering |
| 2096 | * it into the page cache with which we complete the |
| 2097 | * kick start of the volume. It should be safe to do |
| 2098 | * this now as the first extent of $MFT/$DATA is |
| 2099 | * already known and we would hope that we don't need |
| 2100 | * further extents in order to find the other |
| 2101 | * attributes belonging to $MFT. Only time will tell if |
| 2102 | * this is really the case. If not we will have to play |
| 2103 | * magic at this point, possibly duplicating a lot of |
| 2104 | * ntfs_read_inode() at this point. We will need to |
| 2105 | * ensure we do enough of its work to be able to call |
| 2106 | * ntfs_read_inode() on extents of $MFT/$DATA. But lets |
| 2107 | * hope this never happens... |
| 2108 | */ |
| 2109 | ntfs_read_locked_inode(vi); |
| 2110 | if (is_bad_inode(vi)) { |
| 2111 | ntfs_error(sb, "ntfs_read_inode() of $MFT " |
| 2112 | "failed. BUG or corrupt $MFT. " |
| 2113 | "Run chkdsk and if no errors " |
| 2114 | "are found, please report you " |
| 2115 | "saw this message to " |
| 2116 | "linux-ntfs-dev@lists." |
| 2117 | "sourceforge.net"); |
| 2118 | ntfs_attr_put_search_ctx(ctx); |
| 2119 | /* Revert to the safe super operations. */ |
| 2120 | ntfs_free(m); |
| 2121 | return -1; |
| 2122 | } |
| 2123 | /* |
| 2124 | * Re-initialize some specifics about $MFT's inode as |
| 2125 | * ntfs_read_inode() will have set up the default ones. |
| 2126 | */ |
| 2127 | /* Set uid and gid to root. */ |
| 2128 | vi->i_uid = vi->i_gid = 0; |
| 2129 | /* Regular file. No access for anyone. */ |
| 2130 | vi->i_mode = S_IFREG; |
| 2131 | /* No VFS initiated operations allowed for $MFT. */ |
| 2132 | vi->i_op = &ntfs_empty_inode_ops; |
| 2133 | vi->i_fop = &ntfs_empty_file_ops; |
| 2134 | } |
| 2135 | |
| 2136 | /* Get the lowest vcn for the next extent. */ |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2137 | highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | next_vcn = highest_vcn + 1; |
| 2139 | |
| 2140 | /* Only one extent or error, which we catch below. */ |
| 2141 | if (next_vcn <= 0) |
| 2142 | break; |
| 2143 | |
| 2144 | /* Avoid endless loops due to corruption. */ |
| 2145 | if (next_vcn < sle64_to_cpu( |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2146 | a->data.non_resident.lowest_vcn)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | ntfs_error(sb, "$MFT has corrupt attribute list " |
| 2148 | "attribute. Run chkdsk."); |
| 2149 | goto put_err_out; |
| 2150 | } |
| 2151 | } |
| 2152 | if (err != -ENOENT) { |
| 2153 | ntfs_error(sb, "Failed to lookup $MFT/$DATA attribute extent. " |
| 2154 | "$MFT is corrupt. Run chkdsk."); |
| 2155 | goto put_err_out; |
| 2156 | } |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2157 | if (!a) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | ntfs_error(sb, "$MFT/$DATA attribute not found. $MFT is " |
| 2159 | "corrupt. Run chkdsk."); |
| 2160 | goto put_err_out; |
| 2161 | } |
| 2162 | if (highest_vcn && highest_vcn != last_vcn - 1) { |
| 2163 | ntfs_error(sb, "Failed to load the complete runlist for " |
| 2164 | "$MFT/$DATA. Driver bug or corrupt $MFT. " |
| 2165 | "Run chkdsk."); |
| 2166 | ntfs_debug("highest_vcn = 0x%llx, last_vcn - 1 = 0x%llx", |
| 2167 | (unsigned long long)highest_vcn, |
| 2168 | (unsigned long long)last_vcn - 1); |
| 2169 | goto put_err_out; |
| 2170 | } |
| 2171 | ntfs_attr_put_search_ctx(ctx); |
| 2172 | ntfs_debug("Done."); |
| 2173 | ntfs_free(m); |
Ingo Molnar | 5934537 | 2006-07-03 00:25:18 -0700 | [diff] [blame] | 2174 | |
| 2175 | /* |
| 2176 | * Split the locking rules of the MFT inode from the |
| 2177 | * locking rules of other inodes: |
| 2178 | */ |
| 2179 | lockdep_set_class(&ni->runlist.lock, &mft_ni_runlist_lock_key); |
| 2180 | lockdep_set_class(&ni->mrec_lock, &mft_ni_mrec_lock_key); |
| 2181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | return 0; |
| 2183 | |
| 2184 | em_put_err_out: |
| 2185 | ntfs_error(sb, "Couldn't find first extent of $DATA attribute in " |
| 2186 | "attribute list. $MFT is corrupt. Run chkdsk."); |
| 2187 | put_err_out: |
| 2188 | ntfs_attr_put_search_ctx(ctx); |
| 2189 | err_out: |
| 2190 | ntfs_error(sb, "Failed. Marking inode as bad."); |
| 2191 | make_bad_inode(vi); |
| 2192 | ntfs_free(m); |
| 2193 | return -1; |
| 2194 | } |
| 2195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | static void __ntfs_clear_inode(ntfs_inode *ni) |
| 2197 | { |
| 2198 | /* Free all alocated memory. */ |
| 2199 | down_write(&ni->runlist.lock); |
| 2200 | if (ni->runlist.rl) { |
| 2201 | ntfs_free(ni->runlist.rl); |
| 2202 | ni->runlist.rl = NULL; |
| 2203 | } |
| 2204 | up_write(&ni->runlist.lock); |
| 2205 | |
| 2206 | if (ni->attr_list) { |
| 2207 | ntfs_free(ni->attr_list); |
| 2208 | ni->attr_list = NULL; |
| 2209 | } |
| 2210 | |
| 2211 | down_write(&ni->attr_list_rl.lock); |
| 2212 | if (ni->attr_list_rl.rl) { |
| 2213 | ntfs_free(ni->attr_list_rl.rl); |
| 2214 | ni->attr_list_rl.rl = NULL; |
| 2215 | } |
| 2216 | up_write(&ni->attr_list_rl.lock); |
| 2217 | |
| 2218 | if (ni->name_len && ni->name != I30) { |
| 2219 | /* Catch bugs... */ |
| 2220 | BUG_ON(!ni->name); |
| 2221 | kfree(ni->name); |
| 2222 | } |
| 2223 | } |
| 2224 | |
| 2225 | void ntfs_clear_extent_inode(ntfs_inode *ni) |
| 2226 | { |
| 2227 | ntfs_debug("Entering for inode 0x%lx.", ni->mft_no); |
| 2228 | |
| 2229 | BUG_ON(NInoAttr(ni)); |
| 2230 | BUG_ON(ni->nr_extents != -1); |
| 2231 | |
| 2232 | #ifdef NTFS_RW |
| 2233 | if (NInoDirty(ni)) { |
| 2234 | if (!is_bad_inode(VFS_I(ni->ext.base_ntfs_ino))) |
| 2235 | ntfs_error(ni->vol->sb, "Clearing dirty extent inode! " |
| 2236 | "Losing data! This is a BUG!!!"); |
| 2237 | // FIXME: Do something!!! |
| 2238 | } |
| 2239 | #endif /* NTFS_RW */ |
| 2240 | |
| 2241 | __ntfs_clear_inode(ni); |
| 2242 | |
| 2243 | /* Bye, bye... */ |
| 2244 | ntfs_destroy_extent_inode(ni); |
| 2245 | } |
| 2246 | |
| 2247 | /** |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 2248 | * ntfs_evict_big_inode - clean up the ntfs specific part of an inode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | * @vi: vfs inode pending annihilation |
| 2250 | * |
| 2251 | * When the VFS is going to remove an inode from memory, ntfs_clear_big_inode() |
| 2252 | * is called, which deallocates all memory belonging to the NTFS specific part |
| 2253 | * of the inode and returns. |
| 2254 | * |
| 2255 | * If the MFT record is dirty, we commit it before doing anything else. |
| 2256 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 2257 | void ntfs_evict_big_inode(struct inode *vi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | { |
| 2259 | ntfs_inode *ni = NTFS_I(vi); |
| 2260 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 2261 | truncate_inode_pages(&vi->i_data, 0); |
| 2262 | end_writeback(vi); |
| 2263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | #ifdef NTFS_RW |
| 2265 | if (NInoDirty(ni)) { |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 2266 | bool was_bad = (is_bad_inode(vi)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | |
| 2268 | /* Committing the inode also commits all extent inodes. */ |
| 2269 | ntfs_commit_inode(vi); |
| 2270 | |
| 2271 | if (!was_bad && (is_bad_inode(vi) || NInoDirty(ni))) { |
| 2272 | ntfs_error(vi->i_sb, "Failed to commit dirty inode " |
| 2273 | "0x%lx. Losing data!", vi->i_ino); |
| 2274 | // FIXME: Do something!!! |
| 2275 | } |
| 2276 | } |
| 2277 | #endif /* NTFS_RW */ |
| 2278 | |
| 2279 | /* No need to lock at this stage as no one else has a reference. */ |
| 2280 | if (ni->nr_extents > 0) { |
| 2281 | int i; |
| 2282 | |
| 2283 | for (i = 0; i < ni->nr_extents; i++) |
| 2284 | ntfs_clear_extent_inode(ni->ext.extent_ntfs_inos[i]); |
| 2285 | kfree(ni->ext.extent_ntfs_inos); |
| 2286 | } |
| 2287 | |
| 2288 | __ntfs_clear_inode(ni); |
| 2289 | |
| 2290 | if (NInoAttr(ni)) { |
| 2291 | /* Release the base inode if we are holding it. */ |
| 2292 | if (ni->nr_extents == -1) { |
| 2293 | iput(VFS_I(ni->ext.base_ntfs_ino)); |
| 2294 | ni->nr_extents = 0; |
| 2295 | ni->ext.base_ntfs_ino = NULL; |
| 2296 | } |
| 2297 | } |
| 2298 | return; |
| 2299 | } |
| 2300 | |
| 2301 | /** |
| 2302 | * ntfs_show_options - show mount options in /proc/mounts |
| 2303 | * @sf: seq_file in which to write our mount options |
| 2304 | * @mnt: vfs mount whose mount options to display |
| 2305 | * |
| 2306 | * Called by the VFS once for each mounted ntfs volume when someone reads |
| 2307 | * /proc/mounts in order to display the NTFS specific mount options of each |
| 2308 | * mount. The mount options of the vfs mount @mnt are written to the seq file |
| 2309 | * @sf and success is returned. |
| 2310 | */ |
| 2311 | int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt) |
| 2312 | { |
| 2313 | ntfs_volume *vol = NTFS_SB(mnt->mnt_sb); |
| 2314 | int i; |
| 2315 | |
| 2316 | seq_printf(sf, ",uid=%i", vol->uid); |
| 2317 | seq_printf(sf, ",gid=%i", vol->gid); |
| 2318 | if (vol->fmask == vol->dmask) |
| 2319 | seq_printf(sf, ",umask=0%o", vol->fmask); |
| 2320 | else { |
| 2321 | seq_printf(sf, ",fmask=0%o", vol->fmask); |
| 2322 | seq_printf(sf, ",dmask=0%o", vol->dmask); |
| 2323 | } |
| 2324 | seq_printf(sf, ",nls=%s", vol->nls_map->charset); |
| 2325 | if (NVolCaseSensitive(vol)) |
| 2326 | seq_printf(sf, ",case_sensitive"); |
| 2327 | if (NVolShowSystemFiles(vol)) |
| 2328 | seq_printf(sf, ",show_sys_files"); |
Anton Altaparmakov | c002f42 | 2005-02-03 12:02:56 +0000 | [diff] [blame] | 2329 | if (!NVolSparseEnabled(vol)) |
| 2330 | seq_printf(sf, ",disable_sparse"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | for (i = 0; on_errors_arr[i].val; i++) { |
| 2332 | if (on_errors_arr[i].val & vol->on_errors) |
| 2333 | seq_printf(sf, ",errors=%s", on_errors_arr[i].str); |
| 2334 | } |
| 2335 | seq_printf(sf, ",mft_zone_multiplier=%i", vol->mft_zone_multiplier); |
| 2336 | return 0; |
| 2337 | } |
| 2338 | |
| 2339 | #ifdef NTFS_RW |
| 2340 | |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2341 | static const char *es = " Leaving inconsistent metadata. Unmount and run " |
| 2342 | "chkdsk."; |
| 2343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | /** |
| 2345 | * ntfs_truncate - called when the i_size of an ntfs inode is changed |
| 2346 | * @vi: inode for which the i_size was changed |
| 2347 | * |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2348 | * We only support i_size changes for normal files at present, i.e. not |
| 2349 | * compressed and not encrypted. This is enforced in ntfs_setattr(), see |
| 2350 | * below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | * |
| 2352 | * The kernel guarantees that @vi is a regular file (S_ISREG() is true) and |
| 2353 | * that the change is allowed. |
| 2354 | * |
| 2355 | * This implies for us that @vi is a file inode rather than a directory, index, |
| 2356 | * or attribute inode as well as that @vi is a base inode. |
| 2357 | * |
| 2358 | * Returns 0 on success or -errno on error. |
| 2359 | * |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2360 | * Called with ->i_mutex held. In all but one case ->i_alloc_sem is held for |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2361 | * writing. The only case in the kernel where ->i_alloc_sem is not held is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | * mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2363 | * with the current i_size as the offset. The analogous place in NTFS is in |
| 2364 | * fs/ntfs/file.c::ntfs_file_buffered_write() where we call vmtruncate() again |
| 2365 | * without holding ->i_alloc_sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | */ |
| 2367 | int ntfs_truncate(struct inode *vi) |
| 2368 | { |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2369 | s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size; |
| 2370 | VCN highest_vcn; |
| 2371 | unsigned long flags; |
| 2372 | ntfs_inode *base_ni, *ni = NTFS_I(vi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | ntfs_volume *vol = ni->vol; |
| 2374 | ntfs_attr_search_ctx *ctx; |
| 2375 | MFT_RECORD *m; |
Anton Altaparmakov | 5ae9fcf | 2005-03-02 17:03:24 +0000 | [diff] [blame] | 2376 | ATTR_RECORD *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | const char *te = " Leaving file length out of sync with i_size."; |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2378 | int err, mp_size, size_change, alloc_change; |
| 2379 | u32 attr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | |
| 2381 | ntfs_debug("Entering for inode 0x%lx.", vi->i_ino); |
| 2382 | BUG_ON(NInoAttr(ni)); |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2383 | BUG_ON(S_ISDIR(vi->i_mode)); |
| 2384 | BUG_ON(NInoMstProtected(ni)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | BUG_ON(ni->nr_extents < 0); |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2386 | retry_truncate: |
| 2387 | /* |
| 2388 | * Lock the runlist for writing and map the mft record to ensure it is |
| 2389 | * safe to mess with the attribute runlist and sizes. |
| 2390 | */ |
| 2391 | down_write(&ni->runlist.lock); |
| 2392 | if (!NInoAttr(ni)) |
| 2393 | base_ni = ni; |
| 2394 | else |
| 2395 | base_ni = ni->ext.base_ntfs_ino; |
| 2396 | m = map_mft_record(base_ni); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | if (IS_ERR(m)) { |
| 2398 | err = PTR_ERR(m); |
| 2399 | ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx " |
| 2400 | "(error code %d).%s", vi->i_ino, err, te); |
| 2401 | ctx = NULL; |
| 2402 | m = NULL; |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2403 | goto old_bad_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | } |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2405 | ctx = ntfs_attr_get_search_ctx(base_ni, m); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | if (unlikely(!ctx)) { |
| 2407 | ntfs_error(vi->i_sb, "Failed to allocate a search context for " |
| 2408 | "inode 0x%lx (not enough memory).%s", |
| 2409 | vi->i_ino, te); |
| 2410 | err = -ENOMEM; |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2411 | goto old_bad_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | } |
| 2413 | err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, |
| 2414 | CASE_SENSITIVE, 0, NULL, 0, ctx); |
| 2415 | if (unlikely(err)) { |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2416 | if (err == -ENOENT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | ntfs_error(vi->i_sb, "Open attribute is missing from " |
| 2418 | "mft record. Inode 0x%lx is corrupt. " |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2419 | "Run chkdsk.%s", vi->i_ino, te); |
| 2420 | err = -EIO; |
| 2421 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | ntfs_error(vi->i_sb, "Failed to lookup attribute in " |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2423 | "inode 0x%lx (error code %d).%s", |
| 2424 | vi->i_ino, err, te); |
| 2425 | goto old_bad_out; |
| 2426 | } |
| 2427 | m = ctx->mrec; |
| 2428 | a = ctx->attr; |
| 2429 | /* |
| 2430 | * The i_size of the vfs inode is the new size for the attribute value. |
| 2431 | */ |
| 2432 | new_size = i_size_read(vi); |
| 2433 | /* The current size of the attribute value is the old size. */ |
| 2434 | old_size = ntfs_attr_size(a); |
| 2435 | /* Calculate the new allocated size. */ |
| 2436 | if (NInoNonResident(ni)) |
| 2437 | new_alloc_size = (new_size + vol->cluster_size - 1) & |
| 2438 | ~(s64)vol->cluster_size_mask; |
| 2439 | else |
| 2440 | new_alloc_size = (new_size + 7) & ~7; |
| 2441 | /* The current allocated size is the old allocated size. */ |
| 2442 | read_lock_irqsave(&ni->size_lock, flags); |
| 2443 | old_alloc_size = ni->allocated_size; |
| 2444 | read_unlock_irqrestore(&ni->size_lock, flags); |
| 2445 | /* |
| 2446 | * The change in the file size. This will be 0 if no change, >0 if the |
| 2447 | * size is growing, and <0 if the size is shrinking. |
| 2448 | */ |
| 2449 | size_change = -1; |
| 2450 | if (new_size - old_size >= 0) { |
| 2451 | size_change = 1; |
| 2452 | if (new_size == old_size) |
| 2453 | size_change = 0; |
| 2454 | } |
| 2455 | /* As above for the allocated size. */ |
| 2456 | alloc_change = -1; |
| 2457 | if (new_alloc_size - old_alloc_size >= 0) { |
| 2458 | alloc_change = 1; |
| 2459 | if (new_alloc_size == old_alloc_size) |
| 2460 | alloc_change = 0; |
| 2461 | } |
| 2462 | /* |
| 2463 | * If neither the size nor the allocation are being changed there is |
| 2464 | * nothing to do. |
| 2465 | */ |
| 2466 | if (!size_change && !alloc_change) |
| 2467 | goto unm_done; |
| 2468 | /* If the size is changing, check if new size is allowed in $AttrDef. */ |
| 2469 | if (size_change) { |
| 2470 | err = ntfs_attr_size_bounds_check(vol, ni->type, new_size); |
| 2471 | if (unlikely(err)) { |
| 2472 | if (err == -ERANGE) { |
| 2473 | ntfs_error(vol->sb, "Truncate would cause the " |
| 2474 | "inode 0x%lx to %simum size " |
| 2475 | "for its attribute type " |
| 2476 | "(0x%x). Aborting truncate.", |
| 2477 | vi->i_ino, |
| 2478 | new_size > old_size ? "exceed " |
| 2479 | "the max" : "go under the min", |
| 2480 | le32_to_cpu(ni->type)); |
| 2481 | err = -EFBIG; |
| 2482 | } else { |
| 2483 | ntfs_error(vol->sb, "Inode 0x%lx has unknown " |
| 2484 | "attribute type 0x%x. " |
| 2485 | "Aborting truncate.", |
| 2486 | vi->i_ino, |
| 2487 | le32_to_cpu(ni->type)); |
| 2488 | err = -EIO; |
| 2489 | } |
| 2490 | /* Reset the vfs inode size to the old size. */ |
| 2491 | i_size_write(vi, old_size); |
| 2492 | goto err_out; |
| 2493 | } |
| 2494 | } |
| 2495 | if (NInoCompressed(ni) || NInoEncrypted(ni)) { |
| 2496 | ntfs_warning(vi->i_sb, "Changes in inode size are not " |
| 2497 | "supported yet for %s files, ignoring.", |
| 2498 | NInoCompressed(ni) ? "compressed" : |
| 2499 | "encrypted"); |
| 2500 | err = -EOPNOTSUPP; |
| 2501 | goto bad_out; |
| 2502 | } |
| 2503 | if (a->non_resident) |
| 2504 | goto do_non_resident_truncate; |
| 2505 | BUG_ON(NInoNonResident(ni)); |
| 2506 | /* Resize the attribute record to best fit the new attribute size. */ |
| 2507 | if (new_size < vol->mft_record_size && |
| 2508 | !ntfs_resident_attr_value_resize(m, a, new_size)) { |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2509 | /* The resize succeeded! */ |
| 2510 | flush_dcache_mft_record_page(ctx->ntfs_ino); |
| 2511 | mark_mft_record_dirty(ctx->ntfs_ino); |
| 2512 | write_lock_irqsave(&ni->size_lock, flags); |
| 2513 | /* Update the sizes in the ntfs inode and all is done. */ |
| 2514 | ni->allocated_size = le32_to_cpu(a->length) - |
| 2515 | le16_to_cpu(a->data.resident.value_offset); |
| 2516 | /* |
| 2517 | * Note ntfs_resident_attr_value_resize() has already done any |
| 2518 | * necessary data clearing in the attribute record. When the |
| 2519 | * file is being shrunk vmtruncate() will already have cleared |
| 2520 | * the top part of the last partial page, i.e. since this is |
| 2521 | * the resident case this is the page with index 0. However, |
| 2522 | * when the file is being expanded, the page cache page data |
| 2523 | * between the old data_size, i.e. old_size, and the new_size |
| 2524 | * has not been zeroed. Fortunately, we do not need to zero it |
| 2525 | * either since on one hand it will either already be zero due |
| 2526 | * to both readpage and writepage clearing partial page data |
| 2527 | * beyond i_size in which case there is nothing to do or in the |
| 2528 | * case of the file being mmap()ped at the same time, POSIX |
| 2529 | * specifies that the behaviour is unspecified thus we do not |
| 2530 | * have to do anything. This means that in our implementation |
| 2531 | * in the rare case that the file is mmap()ped and a write |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2532 | * occurred into the mmap()ped region just beyond the file size |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2533 | * and writepage has not yet been called to write out the page |
| 2534 | * (which would clear the area beyond the file size) and we now |
| 2535 | * extend the file size to incorporate this dirty region |
| 2536 | * outside the file size, a write of the page would result in |
| 2537 | * this data being written to disk instead of being cleared. |
| 2538 | * Given both POSIX and the Linux mmap(2) man page specify that |
| 2539 | * this corner case is undefined, we choose to leave it like |
| 2540 | * that as this is much simpler for us as we cannot lock the |
| 2541 | * relevant page now since we are holding too many ntfs locks |
| 2542 | * which would result in a lock reversal deadlock. |
| 2543 | */ |
| 2544 | ni->initialized_size = new_size; |
| 2545 | write_unlock_irqrestore(&ni->size_lock, flags); |
| 2546 | goto unm_done; |
| 2547 | } |
| 2548 | /* If the above resize failed, this must be an attribute extension. */ |
| 2549 | BUG_ON(size_change < 0); |
| 2550 | /* |
| 2551 | * We have to drop all the locks so we can call |
| 2552 | * ntfs_attr_make_non_resident(). This could be optimised by try- |
| 2553 | * locking the first page cache page and only if that fails dropping |
| 2554 | * the locks, locking the page, and redoing all the locking and |
| 2555 | * lookups. While this would be a huge optimisation, it is not worth |
| 2556 | * it as this is definitely a slow code path as it only ever can happen |
| 2557 | * once for any given file. |
| 2558 | */ |
| 2559 | ntfs_attr_put_search_ctx(ctx); |
| 2560 | unmap_mft_record(base_ni); |
| 2561 | up_write(&ni->runlist.lock); |
| 2562 | /* |
| 2563 | * Not enough space in the mft record, try to make the attribute |
| 2564 | * non-resident and if successful restart the truncation process. |
| 2565 | */ |
| 2566 | err = ntfs_attr_make_non_resident(ni, old_size); |
| 2567 | if (likely(!err)) |
| 2568 | goto retry_truncate; |
| 2569 | /* |
| 2570 | * Could not make non-resident. If this is due to this not being |
| 2571 | * permitted for this attribute type or there not being enough space, |
| 2572 | * try to make other attributes non-resident. Otherwise fail. |
| 2573 | */ |
| 2574 | if (unlikely(err != -EPERM && err != -ENOSPC)) { |
| 2575 | ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute " |
| 2576 | "type 0x%x, because the conversion from " |
| 2577 | "resident to non-resident attribute failed " |
| 2578 | "with error code %i.", vi->i_ino, |
| 2579 | (unsigned)le32_to_cpu(ni->type), err); |
| 2580 | if (err != -ENOMEM) |
| 2581 | err = -EIO; |
| 2582 | goto conv_err_out; |
| 2583 | } |
| 2584 | /* TODO: Not implemented from here, abort. */ |
| 2585 | if (err == -ENOSPC) |
| 2586 | ntfs_error(vol->sb, "Not enough space in the mft record/on " |
| 2587 | "disk for the non-resident attribute value. " |
| 2588 | "This case is not implemented yet."); |
| 2589 | else /* if (err == -EPERM) */ |
| 2590 | ntfs_error(vol->sb, "This attribute type may not be " |
| 2591 | "non-resident. This case is not implemented " |
| 2592 | "yet."); |
| 2593 | err = -EOPNOTSUPP; |
| 2594 | goto conv_err_out; |
| 2595 | #if 0 |
| 2596 | // TODO: Attempt to make other attributes non-resident. |
| 2597 | if (!err) |
| 2598 | goto do_resident_extend; |
| 2599 | /* |
| 2600 | * Both the attribute list attribute and the standard information |
| 2601 | * attribute must remain in the base inode. Thus, if this is one of |
| 2602 | * these attributes, we have to try to move other attributes out into |
| 2603 | * extent mft records instead. |
| 2604 | */ |
| 2605 | if (ni->type == AT_ATTRIBUTE_LIST || |
| 2606 | ni->type == AT_STANDARD_INFORMATION) { |
| 2607 | // TODO: Attempt to move other attributes into extent mft |
| 2608 | // records. |
| 2609 | err = -EOPNOTSUPP; |
| 2610 | if (!err) |
| 2611 | goto do_resident_extend; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | goto err_out; |
| 2613 | } |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2614 | // TODO: Attempt to move this attribute to an extent mft record, but |
| 2615 | // only if it is not already the only attribute in an mft record in |
| 2616 | // which case there would be nothing to gain. |
| 2617 | err = -EOPNOTSUPP; |
| 2618 | if (!err) |
| 2619 | goto do_resident_extend; |
| 2620 | /* There is nothing we can do to make enough space. )-: */ |
| 2621 | goto err_out; |
| 2622 | #endif |
| 2623 | do_non_resident_truncate: |
| 2624 | BUG_ON(!NInoNonResident(ni)); |
| 2625 | if (alloc_change < 0) { |
| 2626 | highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn); |
| 2627 | if (highest_vcn > 0 && |
| 2628 | old_alloc_size >> vol->cluster_size_bits > |
| 2629 | highest_vcn + 1) { |
| 2630 | /* |
| 2631 | * This attribute has multiple extents. Not yet |
| 2632 | * supported. |
| 2633 | */ |
| 2634 | ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, " |
| 2635 | "attribute type 0x%x, because the " |
| 2636 | "attribute is highly fragmented (it " |
| 2637 | "consists of multiple extents) and " |
| 2638 | "this case is not implemented yet.", |
| 2639 | vi->i_ino, |
| 2640 | (unsigned)le32_to_cpu(ni->type)); |
| 2641 | err = -EOPNOTSUPP; |
| 2642 | goto bad_out; |
| 2643 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | } |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2645 | /* |
| 2646 | * If the size is shrinking, need to reduce the initialized_size and |
| 2647 | * the data_size before reducing the allocation. |
| 2648 | */ |
| 2649 | if (size_change < 0) { |
| 2650 | /* |
| 2651 | * Make the valid size smaller (i_size is already up-to-date). |
| 2652 | */ |
| 2653 | write_lock_irqsave(&ni->size_lock, flags); |
| 2654 | if (new_size < ni->initialized_size) { |
| 2655 | ni->initialized_size = new_size; |
| 2656 | a->data.non_resident.initialized_size = |
| 2657 | cpu_to_sle64(new_size); |
| 2658 | } |
| 2659 | a->data.non_resident.data_size = cpu_to_sle64(new_size); |
| 2660 | write_unlock_irqrestore(&ni->size_lock, flags); |
| 2661 | flush_dcache_mft_record_page(ctx->ntfs_ino); |
| 2662 | mark_mft_record_dirty(ctx->ntfs_ino); |
| 2663 | /* If the allocated size is not changing, we are done. */ |
| 2664 | if (!alloc_change) |
| 2665 | goto unm_done; |
| 2666 | /* |
| 2667 | * If the size is shrinking it makes no sense for the |
| 2668 | * allocation to be growing. |
| 2669 | */ |
| 2670 | BUG_ON(alloc_change > 0); |
| 2671 | } else /* if (size_change >= 0) */ { |
| 2672 | /* |
| 2673 | * The file size is growing or staying the same but the |
| 2674 | * allocation can be shrinking, growing or staying the same. |
| 2675 | */ |
| 2676 | if (alloc_change > 0) { |
| 2677 | /* |
| 2678 | * We need to extend the allocation and possibly update |
| 2679 | * the data size. If we are updating the data size, |
| 2680 | * since we are not touching the initialized_size we do |
| 2681 | * not need to worry about the actual data on disk. |
| 2682 | * And as far as the page cache is concerned, there |
| 2683 | * will be no pages beyond the old data size and any |
| 2684 | * partial region in the last page between the old and |
| 2685 | * new data size (or the end of the page if the new |
| 2686 | * data size is outside the page) does not need to be |
| 2687 | * modified as explained above for the resident |
| 2688 | * attribute truncate case. To do this, we simply drop |
| 2689 | * the locks we hold and leave all the work to our |
| 2690 | * friendly helper ntfs_attr_extend_allocation(). |
| 2691 | */ |
| 2692 | ntfs_attr_put_search_ctx(ctx); |
| 2693 | unmap_mft_record(base_ni); |
| 2694 | up_write(&ni->runlist.lock); |
| 2695 | err = ntfs_attr_extend_allocation(ni, new_size, |
| 2696 | size_change > 0 ? new_size : -1, -1); |
| 2697 | /* |
| 2698 | * ntfs_attr_extend_allocation() will have done error |
| 2699 | * output already. |
| 2700 | */ |
| 2701 | goto done; |
| 2702 | } |
| 2703 | if (!alloc_change) |
| 2704 | goto alloc_done; |
| 2705 | } |
| 2706 | /* alloc_change < 0 */ |
| 2707 | /* Free the clusters. */ |
| 2708 | nr_freed = ntfs_cluster_free(ni, new_alloc_size >> |
| 2709 | vol->cluster_size_bits, -1, ctx); |
| 2710 | m = ctx->mrec; |
| 2711 | a = ctx->attr; |
| 2712 | if (unlikely(nr_freed < 0)) { |
| 2713 | ntfs_error(vol->sb, "Failed to release cluster(s) (error code " |
| 2714 | "%lli). Unmount and run chkdsk to recover " |
| 2715 | "the lost cluster(s).", (long long)nr_freed); |
| 2716 | NVolSetErrors(vol); |
| 2717 | nr_freed = 0; |
| 2718 | } |
| 2719 | /* Truncate the runlist. */ |
| 2720 | err = ntfs_rl_truncate_nolock(vol, &ni->runlist, |
| 2721 | new_alloc_size >> vol->cluster_size_bits); |
| 2722 | /* |
| 2723 | * If the runlist truncation failed and/or the search context is no |
| 2724 | * longer valid, we cannot resize the attribute record or build the |
| 2725 | * mapping pairs array thus we mark the inode bad so that no access to |
| 2726 | * the freed clusters can happen. |
| 2727 | */ |
| 2728 | if (unlikely(err || IS_ERR(m))) { |
| 2729 | ntfs_error(vol->sb, "Failed to %s (error code %li).%s", |
| 2730 | IS_ERR(m) ? |
| 2731 | "restore attribute search context" : |
| 2732 | "truncate attribute runlist", |
| 2733 | IS_ERR(m) ? PTR_ERR(m) : err, es); |
| 2734 | err = -EIO; |
| 2735 | goto bad_out; |
| 2736 | } |
| 2737 | /* Get the size for the shrunk mapping pairs array for the runlist. */ |
| 2738 | mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1); |
| 2739 | if (unlikely(mp_size <= 0)) { |
| 2740 | ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, " |
| 2741 | "attribute type 0x%x, because determining the " |
| 2742 | "size for the mapping pairs failed with error " |
| 2743 | "code %i.%s", vi->i_ino, |
| 2744 | (unsigned)le32_to_cpu(ni->type), mp_size, es); |
| 2745 | err = -EIO; |
| 2746 | goto bad_out; |
| 2747 | } |
| 2748 | /* |
| 2749 | * Shrink the attribute record for the new mapping pairs array. Note, |
| 2750 | * this cannot fail since we are making the attribute smaller thus by |
| 2751 | * definition there is enough space to do so. |
| 2752 | */ |
| 2753 | attr_len = le32_to_cpu(a->length); |
| 2754 | err = ntfs_attr_record_resize(m, a, mp_size + |
| 2755 | le16_to_cpu(a->data.non_resident.mapping_pairs_offset)); |
| 2756 | BUG_ON(err); |
| 2757 | /* |
| 2758 | * Generate the mapping pairs array directly into the attribute record. |
| 2759 | */ |
| 2760 | err = ntfs_mapping_pairs_build(vol, (u8*)a + |
| 2761 | le16_to_cpu(a->data.non_resident.mapping_pairs_offset), |
| 2762 | mp_size, ni->runlist.rl, 0, -1, NULL); |
| 2763 | if (unlikely(err)) { |
| 2764 | ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, " |
| 2765 | "attribute type 0x%x, because building the " |
| 2766 | "mapping pairs failed with error code %i.%s", |
| 2767 | vi->i_ino, (unsigned)le32_to_cpu(ni->type), |
| 2768 | err, es); |
| 2769 | err = -EIO; |
| 2770 | goto bad_out; |
| 2771 | } |
| 2772 | /* Update the allocated/compressed size as well as the highest vcn. */ |
| 2773 | a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >> |
| 2774 | vol->cluster_size_bits) - 1); |
| 2775 | write_lock_irqsave(&ni->size_lock, flags); |
| 2776 | ni->allocated_size = new_alloc_size; |
| 2777 | a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size); |
| 2778 | if (NInoSparse(ni) || NInoCompressed(ni)) { |
| 2779 | if (nr_freed) { |
| 2780 | ni->itype.compressed.size -= nr_freed << |
| 2781 | vol->cluster_size_bits; |
| 2782 | BUG_ON(ni->itype.compressed.size < 0); |
| 2783 | a->data.non_resident.compressed_size = cpu_to_sle64( |
| 2784 | ni->itype.compressed.size); |
| 2785 | vi->i_blocks = ni->itype.compressed.size >> 9; |
| 2786 | } |
| 2787 | } else |
| 2788 | vi->i_blocks = new_alloc_size >> 9; |
| 2789 | write_unlock_irqrestore(&ni->size_lock, flags); |
| 2790 | /* |
| 2791 | * We have shrunk the allocation. If this is a shrinking truncate we |
| 2792 | * have already dealt with the initialized_size and the data_size above |
| 2793 | * and we are done. If the truncate is only changing the allocation |
| 2794 | * and not the data_size, we are also done. If this is an extending |
| 2795 | * truncate, need to extend the data_size now which is ensured by the |
| 2796 | * fact that @size_change is positive. |
| 2797 | */ |
| 2798 | alloc_done: |
| 2799 | /* |
| 2800 | * If the size is growing, need to update it now. If it is shrinking, |
| 2801 | * we have already updated it above (before the allocation change). |
| 2802 | */ |
| 2803 | if (size_change > 0) |
| 2804 | a->data.non_resident.data_size = cpu_to_sle64(new_size); |
| 2805 | /* Ensure the modified mft record is written out. */ |
| 2806 | flush_dcache_mft_record_page(ctx->ntfs_ino); |
| 2807 | mark_mft_record_dirty(ctx->ntfs_ino); |
| 2808 | unm_done: |
| 2809 | ntfs_attr_put_search_ctx(ctx); |
| 2810 | unmap_mft_record(base_ni); |
| 2811 | up_write(&ni->runlist.lock); |
| 2812 | done: |
| 2813 | /* Update the mtime and ctime on the base inode. */ |
Christoph Hellwig | 870f481 | 2006-01-09 20:52:01 -0800 | [diff] [blame] | 2814 | /* normally ->truncate shouldn't update ctime or mtime, |
| 2815 | * but ntfs did before so it got a copy & paste version |
| 2816 | * of file_update_time. one day someone should fix this |
| 2817 | * for real. |
| 2818 | */ |
| 2819 | if (!IS_NOCMTIME(VFS_I(base_ni)) && !IS_RDONLY(VFS_I(base_ni))) { |
| 2820 | struct timespec now = current_fs_time(VFS_I(base_ni)->i_sb); |
| 2821 | int sync_it = 0; |
| 2822 | |
| 2823 | if (!timespec_equal(&VFS_I(base_ni)->i_mtime, &now) || |
| 2824 | !timespec_equal(&VFS_I(base_ni)->i_ctime, &now)) |
| 2825 | sync_it = 1; |
| 2826 | VFS_I(base_ni)->i_mtime = now; |
| 2827 | VFS_I(base_ni)->i_ctime = now; |
| 2828 | |
| 2829 | if (sync_it) |
| 2830 | mark_inode_dirty_sync(VFS_I(base_ni)); |
| 2831 | } |
| 2832 | |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2833 | if (likely(!err)) { |
| 2834 | NInoClearTruncateFailed(ni); |
| 2835 | ntfs_debug("Done."); |
| 2836 | } |
| 2837 | return err; |
| 2838 | old_bad_out: |
| 2839 | old_size = -1; |
| 2840 | bad_out: |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 2841 | if (err != -ENOMEM && err != -EOPNOTSUPP) |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2842 | NVolSetErrors(vol); |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2843 | if (err != -EOPNOTSUPP) |
| 2844 | NInoSetTruncateFailed(ni); |
| 2845 | else if (old_size >= 0) |
| 2846 | i_size_write(vi, old_size); |
| 2847 | err_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | if (ctx) |
| 2849 | ntfs_attr_put_search_ctx(ctx); |
| 2850 | if (m) |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2851 | unmap_mft_record(base_ni); |
| 2852 | up_write(&ni->runlist.lock); |
| 2853 | out: |
| 2854 | ntfs_debug("Failed. Returning error code %i.", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | return err; |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2856 | conv_err_out: |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 2857 | if (err != -ENOMEM && err != -EOPNOTSUPP) |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2858 | NVolSetErrors(vol); |
Anton Altaparmakov | dd07233 | 2005-10-04 15:39:02 +0100 | [diff] [blame] | 2859 | if (err != -EOPNOTSUPP) |
| 2860 | NInoSetTruncateFailed(ni); |
| 2861 | else |
| 2862 | i_size_write(vi, old_size); |
| 2863 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2864 | } |
| 2865 | |
| 2866 | /** |
| 2867 | * ntfs_truncate_vfs - wrapper for ntfs_truncate() that has no return value |
| 2868 | * @vi: inode for which the i_size was changed |
| 2869 | * |
| 2870 | * Wrapper for ntfs_truncate() that has no return value. |
| 2871 | * |
| 2872 | * See ntfs_truncate() description above for details. |
| 2873 | */ |
| 2874 | void ntfs_truncate_vfs(struct inode *vi) { |
| 2875 | ntfs_truncate(vi); |
| 2876 | } |
| 2877 | |
| 2878 | /** |
| 2879 | * ntfs_setattr - called from notify_change() when an attribute is being changed |
| 2880 | * @dentry: dentry whose attributes to change |
| 2881 | * @attr: structure describing the attributes and the changes |
| 2882 | * |
| 2883 | * We have to trap VFS attempts to truncate the file described by @dentry as |
| 2884 | * soon as possible, because we do not implement changes in i_size yet. So we |
| 2885 | * abort all i_size changes here. |
| 2886 | * |
| 2887 | * We also abort all changes of user, group, and mode as we do not implement |
| 2888 | * the NTFS ACLs yet. |
| 2889 | * |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2890 | * Called with ->i_mutex held. For the ATTR_SIZE (i.e. ->truncate) case, also |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | * called with ->i_alloc_sem held for writing. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2892 | */ |
| 2893 | int ntfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 2894 | { |
| 2895 | struct inode *vi = dentry->d_inode; |
| 2896 | int err; |
| 2897 | unsigned int ia_valid = attr->ia_valid; |
| 2898 | |
| 2899 | err = inode_change_ok(vi, attr); |
| 2900 | if (err) |
Anton Altaparmakov | e943825 | 2005-10-04 16:01:06 +0100 | [diff] [blame] | 2901 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2902 | /* We do not support NTFS ACLs yet. */ |
| 2903 | if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) { |
| 2904 | ntfs_warning(vi->i_sb, "Changes in user/group/mode are not " |
| 2905 | "supported yet, ignoring."); |
| 2906 | err = -EOPNOTSUPP; |
| 2907 | goto out; |
| 2908 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | if (ia_valid & ATTR_SIZE) { |
| 2910 | if (attr->ia_size != i_size_read(vi)) { |
Anton Altaparmakov | e943825 | 2005-10-04 16:01:06 +0100 | [diff] [blame] | 2911 | ntfs_inode *ni = NTFS_I(vi); |
| 2912 | /* |
| 2913 | * FIXME: For now we do not support resizing of |
| 2914 | * compressed or encrypted files yet. |
| 2915 | */ |
| 2916 | if (NInoCompressed(ni) || NInoEncrypted(ni)) { |
| 2917 | ntfs_warning(vi->i_sb, "Changes in inode size " |
| 2918 | "are not supported yet for " |
| 2919 | "%s files, ignoring.", |
| 2920 | NInoCompressed(ni) ? |
| 2921 | "compressed" : "encrypted"); |
| 2922 | err = -EOPNOTSUPP; |
| 2923 | } else |
| 2924 | err = vmtruncate(vi, attr->ia_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | if (err || ia_valid == ATTR_SIZE) |
| 2926 | goto out; |
| 2927 | } else { |
| 2928 | /* |
| 2929 | * We skipped the truncate but must still update |
| 2930 | * timestamps. |
| 2931 | */ |
Anton Altaparmakov | 1c7d469 | 2005-09-08 21:15:09 +0100 | [diff] [blame] | 2932 | ia_valid |= ATTR_MTIME | ATTR_CTIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | } |
| 2934 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | if (ia_valid & ATTR_ATIME) |
Anton Altaparmakov | 1c7d469 | 2005-09-08 21:15:09 +0100 | [diff] [blame] | 2936 | vi->i_atime = timespec_trunc(attr->ia_atime, |
| 2937 | vi->i_sb->s_time_gran); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2938 | if (ia_valid & ATTR_MTIME) |
Anton Altaparmakov | 1c7d469 | 2005-09-08 21:15:09 +0100 | [diff] [blame] | 2939 | vi->i_mtime = timespec_trunc(attr->ia_mtime, |
| 2940 | vi->i_sb->s_time_gran); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2941 | if (ia_valid & ATTR_CTIME) |
Anton Altaparmakov | 1c7d469 | 2005-09-08 21:15:09 +0100 | [diff] [blame] | 2942 | vi->i_ctime = timespec_trunc(attr->ia_ctime, |
| 2943 | vi->i_sb->s_time_gran); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2944 | mark_inode_dirty(vi); |
| 2945 | out: |
| 2946 | return err; |
| 2947 | } |
| 2948 | |
| 2949 | /** |
| 2950 | * ntfs_write_inode - write out a dirty inode |
| 2951 | * @vi: inode to write out |
| 2952 | * @sync: if true, write out synchronously |
| 2953 | * |
| 2954 | * Write out a dirty inode to disk including any extent inodes if present. |
| 2955 | * |
| 2956 | * If @sync is true, commit the inode to disk and wait for io completion. This |
| 2957 | * is done using write_mft_record(). |
| 2958 | * |
| 2959 | * If @sync is false, just schedule the write to happen but do not wait for i/o |
| 2960 | * completion. In 2.6 kernels, scheduling usually happens just by virtue of |
| 2961 | * marking the page (and in this case mft record) dirty but we do not implement |
| 2962 | * this yet as write_mft_record() largely ignores the @sync parameter and |
| 2963 | * always performs synchronous writes. |
| 2964 | * |
| 2965 | * Return 0 on success and -errno on error. |
| 2966 | */ |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 2967 | int __ntfs_write_inode(struct inode *vi, int sync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2968 | { |
| 2969 | sle64 nt; |
| 2970 | ntfs_inode *ni = NTFS_I(vi); |
| 2971 | ntfs_attr_search_ctx *ctx; |
| 2972 | MFT_RECORD *m; |
| 2973 | STANDARD_INFORMATION *si; |
| 2974 | int err = 0; |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 2975 | bool modified = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2976 | |
| 2977 | ntfs_debug("Entering for %sinode 0x%lx.", NInoAttr(ni) ? "attr " : "", |
| 2978 | vi->i_ino); |
| 2979 | /* |
| 2980 | * Dirty attribute inodes are written via their real inodes so just |
| 2981 | * clean them here. Access time updates are taken care off when the |
| 2982 | * real inode is written. |
| 2983 | */ |
| 2984 | if (NInoAttr(ni)) { |
| 2985 | NInoClearDirty(ni); |
| 2986 | ntfs_debug("Done."); |
| 2987 | return 0; |
| 2988 | } |
| 2989 | /* Map, pin, and lock the mft record belonging to the inode. */ |
| 2990 | m = map_mft_record(ni); |
| 2991 | if (IS_ERR(m)) { |
| 2992 | err = PTR_ERR(m); |
| 2993 | goto err_out; |
| 2994 | } |
| 2995 | /* Update the access times in the standard information attribute. */ |
| 2996 | ctx = ntfs_attr_get_search_ctx(ni, m); |
| 2997 | if (unlikely(!ctx)) { |
| 2998 | err = -ENOMEM; |
| 2999 | goto unm_err_out; |
| 3000 | } |
| 3001 | err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0, |
| 3002 | CASE_SENSITIVE, 0, NULL, 0, ctx); |
| 3003 | if (unlikely(err)) { |
| 3004 | ntfs_attr_put_search_ctx(ctx); |
| 3005 | goto unm_err_out; |
| 3006 | } |
| 3007 | si = (STANDARD_INFORMATION*)((u8*)ctx->attr + |
| 3008 | le16_to_cpu(ctx->attr->data.resident.value_offset)); |
| 3009 | /* Update the access times if they have changed. */ |
| 3010 | nt = utc2ntfs(vi->i_mtime); |
| 3011 | if (si->last_data_change_time != nt) { |
| 3012 | ntfs_debug("Updating mtime for inode 0x%lx: old = 0x%llx, " |
Randy Dunlap | 8907547 | 2005-03-03 11:19:53 +0000 | [diff] [blame] | 3013 | "new = 0x%llx", vi->i_ino, (long long) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | sle64_to_cpu(si->last_data_change_time), |
Randy Dunlap | 8907547 | 2005-03-03 11:19:53 +0000 | [diff] [blame] | 3015 | (long long)sle64_to_cpu(nt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3016 | si->last_data_change_time = nt; |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 3017 | modified = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | } |
| 3019 | nt = utc2ntfs(vi->i_ctime); |
| 3020 | if (si->last_mft_change_time != nt) { |
| 3021 | ntfs_debug("Updating ctime for inode 0x%lx: old = 0x%llx, " |
Randy Dunlap | 8907547 | 2005-03-03 11:19:53 +0000 | [diff] [blame] | 3022 | "new = 0x%llx", vi->i_ino, (long long) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | sle64_to_cpu(si->last_mft_change_time), |
Randy Dunlap | 8907547 | 2005-03-03 11:19:53 +0000 | [diff] [blame] | 3024 | (long long)sle64_to_cpu(nt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | si->last_mft_change_time = nt; |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 3026 | modified = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | } |
| 3028 | nt = utc2ntfs(vi->i_atime); |
| 3029 | if (si->last_access_time != nt) { |
| 3030 | ntfs_debug("Updating atime for inode 0x%lx: old = 0x%llx, " |
| 3031 | "new = 0x%llx", vi->i_ino, |
Randy Dunlap | 8907547 | 2005-03-03 11:19:53 +0000 | [diff] [blame] | 3032 | (long long)sle64_to_cpu(si->last_access_time), |
| 3033 | (long long)sle64_to_cpu(nt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | si->last_access_time = nt; |
Richard Knutsson | c49c311 | 2006-09-30 23:27:12 -0700 | [diff] [blame] | 3035 | modified = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | } |
| 3037 | /* |
| 3038 | * If we just modified the standard information attribute we need to |
| 3039 | * mark the mft record it is in dirty. We do this manually so that |
| 3040 | * mark_inode_dirty() is not called which would redirty the inode and |
| 3041 | * hence result in an infinite loop of trying to write the inode. |
| 3042 | * There is no need to mark the base inode nor the base mft record |
| 3043 | * dirty, since we are going to write this mft record below in any case |
| 3044 | * and the base mft record may actually not have been modified so it |
| 3045 | * might not need to be written out. |
| 3046 | * NOTE: It is not a problem when the inode for $MFT itself is being |
| 3047 | * written out as mark_ntfs_record_dirty() will only set I_DIRTY_PAGES |
| 3048 | * on the $MFT inode and hence ntfs_write_inode() will not be |
| 3049 | * re-invoked because of it which in turn is ok since the dirtied mft |
| 3050 | * record will be cleaned and written out to disk below, i.e. before |
| 3051 | * this function returns. |
| 3052 | */ |
Anton Altaparmakov | 20fdcf1 | 2006-03-23 16:21:02 +0000 | [diff] [blame] | 3053 | if (modified) { |
| 3054 | flush_dcache_mft_record_page(ctx->ntfs_ino); |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 3055 | if (!NInoTestSetDirty(ctx->ntfs_ino)) |
Anton Altaparmakov | 20fdcf1 | 2006-03-23 16:21:02 +0000 | [diff] [blame] | 3056 | mark_ntfs_record_dirty(ctx->ntfs_ino->page, |
| 3057 | ctx->ntfs_ino->page_ofs); |
| 3058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3059 | ntfs_attr_put_search_ctx(ctx); |
| 3060 | /* Now the access times are updated, write the base mft record. */ |
| 3061 | if (NInoDirty(ni)) |
| 3062 | err = write_mft_record(ni, m, sync); |
| 3063 | /* Write all attached extent mft records. */ |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 3064 | mutex_lock(&ni->extent_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3065 | if (ni->nr_extents > 0) { |
| 3066 | ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos; |
| 3067 | int i; |
| 3068 | |
| 3069 | ntfs_debug("Writing %i extent inodes.", ni->nr_extents); |
| 3070 | for (i = 0; i < ni->nr_extents; i++) { |
| 3071 | ntfs_inode *tni = extent_nis[i]; |
| 3072 | |
| 3073 | if (NInoDirty(tni)) { |
| 3074 | MFT_RECORD *tm = map_mft_record(tni); |
| 3075 | int ret; |
| 3076 | |
| 3077 | if (IS_ERR(tm)) { |
| 3078 | if (!err || err == -ENOMEM) |
| 3079 | err = PTR_ERR(tm); |
| 3080 | continue; |
| 3081 | } |
| 3082 | ret = write_mft_record(tni, tm, sync); |
| 3083 | unmap_mft_record(tni); |
| 3084 | if (unlikely(ret)) { |
| 3085 | if (!err || err == -ENOMEM) |
| 3086 | err = ret; |
| 3087 | } |
| 3088 | } |
| 3089 | } |
| 3090 | } |
Ingo Molnar | 4e5e529 | 2006-03-23 16:57:48 +0000 | [diff] [blame] | 3091 | mutex_unlock(&ni->extent_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3092 | unmap_mft_record(ni); |
| 3093 | if (unlikely(err)) |
| 3094 | goto err_out; |
| 3095 | ntfs_debug("Done."); |
| 3096 | return 0; |
| 3097 | unm_err_out: |
| 3098 | unmap_mft_record(ni); |
| 3099 | err_out: |
| 3100 | if (err == -ENOMEM) { |
| 3101 | ntfs_warning(vi->i_sb, "Not enough memory to write inode. " |
| 3102 | "Marking the inode dirty again, so the VFS " |
| 3103 | "retries later."); |
| 3104 | mark_inode_dirty(vi); |
| 3105 | } else { |
Anton Altaparmakov | a778f21 | 2006-03-23 16:18:23 +0000 | [diff] [blame] | 3106 | ntfs_error(vi->i_sb, "Failed (error %i): Run chkdsk.", -err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3107 | NVolSetErrors(ni->vol); |
| 3108 | } |
| 3109 | return err; |
| 3110 | } |
| 3111 | |
| 3112 | #endif /* NTFS_RW */ |