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a1d312de | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * super.c - NTFS kernel super block handling. Part of the Linux-NTFS project. | |
4 | * | |
0e375795 | 5 | * Copyright (c) 2001-2012 Anton Altaparmakov and Tuxera Inc. |
1da177e4 | 6 | * Copyright (c) 2001,2002 Richard Russon |
1da177e4 | 7 | */ |
87c1b497 | 8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
1da177e4 LT |
9 | |
10 | #include <linux/stddef.h> | |
11 | #include <linux/init.h> | |
78af34f0 | 12 | #include <linux/slab.h> |
1da177e4 LT |
13 | #include <linux/string.h> |
14 | #include <linux/spinlock.h> | |
e1defc4f | 15 | #include <linux/blkdev.h> /* For bdev_logical_block_size(). */ |
1da177e4 LT |
16 | #include <linux/backing-dev.h> |
17 | #include <linux/buffer_head.h> | |
18 | #include <linux/vfs.h> | |
19 | #include <linux/moduleparam.h> | |
c4af9644 | 20 | #include <linux/bitmap.h> |
1da177e4 LT |
21 | |
22 | #include "sysctl.h" | |
23 | #include "logfile.h" | |
24 | #include "quota.h" | |
3f2faef0 | 25 | #include "usnjrnl.h" |
1da177e4 LT |
26 | #include "dir.h" |
27 | #include "debug.h" | |
28 | #include "index.h" | |
a9185b41 | 29 | #include "inode.h" |
1da177e4 | 30 | #include "aops.h" |
b0d2374d | 31 | #include "layout.h" |
1da177e4 LT |
32 | #include "malloc.h" |
33 | #include "ntfs.h" | |
34 | ||
c002f425 | 35 | /* Number of mounted filesystems which have compression enabled. */ |
1da177e4 LT |
36 | static unsigned long ntfs_nr_compression_users; |
37 | ||
38 | /* A global default upcase table and a corresponding reference count. */ | |
504e0e2f FF |
39 | static ntfschar *default_upcase; |
40 | static unsigned long ntfs_nr_upcase_users; | |
1da177e4 LT |
41 | |
42 | /* Error constants/strings used in inode.c::ntfs_show_options(). */ | |
43 | typedef enum { | |
44 | /* One of these must be present, default is ON_ERRORS_CONTINUE. */ | |
45 | ON_ERRORS_PANIC = 0x01, | |
46 | ON_ERRORS_REMOUNT_RO = 0x02, | |
47 | ON_ERRORS_CONTINUE = 0x04, | |
48 | /* Optional, can be combined with any of the above. */ | |
49 | ON_ERRORS_RECOVER = 0x10, | |
50 | } ON_ERRORS_ACTIONS; | |
51 | ||
52 | const option_t on_errors_arr[] = { | |
53 | { ON_ERRORS_PANIC, "panic" }, | |
54 | { ON_ERRORS_REMOUNT_RO, "remount-ro", }, | |
55 | { ON_ERRORS_CONTINUE, "continue", }, | |
56 | { ON_ERRORS_RECOVER, "recover" }, | |
57 | { 0, NULL } | |
58 | }; | |
59 | ||
60 | /** | |
61 | * simple_getbool - | |
62 | * | |
63 | * Copied from old ntfs driver (which copied from vfat driver). | |
64 | */ | |
c49c3111 | 65 | static int simple_getbool(char *s, bool *setval) |
1da177e4 LT |
66 | { |
67 | if (s) { | |
68 | if (!strcmp(s, "1") || !strcmp(s, "yes") || !strcmp(s, "true")) | |
c49c3111 | 69 | *setval = true; |
1da177e4 LT |
70 | else if (!strcmp(s, "0") || !strcmp(s, "no") || |
71 | !strcmp(s, "false")) | |
c49c3111 | 72 | *setval = false; |
1da177e4 LT |
73 | else |
74 | return 0; | |
75 | } else | |
c49c3111 | 76 | *setval = true; |
1da177e4 LT |
77 | return 1; |
78 | } | |
79 | ||
80 | /** | |
81 | * parse_options - parse the (re)mount options | |
82 | * @vol: ntfs volume | |
83 | * @opt: string containing the (re)mount options | |
84 | * | |
85 | * Parse the recognized options in @opt for the ntfs volume described by @vol. | |
86 | */ | |
c49c3111 | 87 | static bool parse_options(ntfs_volume *vol, char *opt) |
1da177e4 LT |
88 | { |
89 | char *p, *v, *ov; | |
90 | static char *utf8 = "utf8"; | |
91 | int errors = 0, sloppy = 0; | |
b29f7751 EB |
92 | kuid_t uid = INVALID_UID; |
93 | kgid_t gid = INVALID_GID; | |
d0c00d06 | 94 | umode_t fmask = (umode_t)-1, dmask = (umode_t)-1; |
1da177e4 | 95 | int mft_zone_multiplier = -1, on_errors = -1; |
c002f425 | 96 | int show_sys_files = -1, case_sensitive = -1, disable_sparse = -1; |
1da177e4 LT |
97 | struct nls_table *nls_map = NULL, *old_nls; |
98 | ||
99 | /* I am lazy... (-8 */ | |
100 | #define NTFS_GETOPT_WITH_DEFAULT(option, variable, default_value) \ | |
101 | if (!strcmp(p, option)) { \ | |
102 | if (!v || !*v) \ | |
103 | variable = default_value; \ | |
104 | else { \ | |
105 | variable = simple_strtoul(ov = v, &v, 0); \ | |
106 | if (*v) \ | |
107 | goto needs_val; \ | |
108 | } \ | |
109 | } | |
110 | #define NTFS_GETOPT(option, variable) \ | |
111 | if (!strcmp(p, option)) { \ | |
112 | if (!v || !*v) \ | |
113 | goto needs_arg; \ | |
114 | variable = simple_strtoul(ov = v, &v, 0); \ | |
115 | if (*v) \ | |
116 | goto needs_val; \ | |
117 | } | |
b29f7751 EB |
118 | #define NTFS_GETOPT_UID(option, variable) \ |
119 | if (!strcmp(p, option)) { \ | |
120 | uid_t uid_value; \ | |
121 | if (!v || !*v) \ | |
122 | goto needs_arg; \ | |
123 | uid_value = simple_strtoul(ov = v, &v, 0); \ | |
124 | if (*v) \ | |
125 | goto needs_val; \ | |
126 | variable = make_kuid(current_user_ns(), uid_value); \ | |
127 | if (!uid_valid(variable)) \ | |
128 | goto needs_val; \ | |
129 | } | |
130 | #define NTFS_GETOPT_GID(option, variable) \ | |
131 | if (!strcmp(p, option)) { \ | |
132 | gid_t gid_value; \ | |
133 | if (!v || !*v) \ | |
134 | goto needs_arg; \ | |
135 | gid_value = simple_strtoul(ov = v, &v, 0); \ | |
136 | if (*v) \ | |
137 | goto needs_val; \ | |
138 | variable = make_kgid(current_user_ns(), gid_value); \ | |
139 | if (!gid_valid(variable)) \ | |
140 | goto needs_val; \ | |
141 | } | |
5d46770f AA |
142 | #define NTFS_GETOPT_OCTAL(option, variable) \ |
143 | if (!strcmp(p, option)) { \ | |
144 | if (!v || !*v) \ | |
145 | goto needs_arg; \ | |
146 | variable = simple_strtoul(ov = v, &v, 8); \ | |
147 | if (*v) \ | |
148 | goto needs_val; \ | |
149 | } | |
1da177e4 LT |
150 | #define NTFS_GETOPT_BOOL(option, variable) \ |
151 | if (!strcmp(p, option)) { \ | |
c49c3111 | 152 | bool val; \ |
1da177e4 LT |
153 | if (!simple_getbool(v, &val)) \ |
154 | goto needs_bool; \ | |
155 | variable = val; \ | |
156 | } | |
157 | #define NTFS_GETOPT_OPTIONS_ARRAY(option, variable, opt_array) \ | |
158 | if (!strcmp(p, option)) { \ | |
159 | int _i; \ | |
160 | if (!v || !*v) \ | |
161 | goto needs_arg; \ | |
162 | ov = v; \ | |
163 | if (variable == -1) \ | |
164 | variable = 0; \ | |
165 | for (_i = 0; opt_array[_i].str && *opt_array[_i].str; _i++) \ | |
166 | if (!strcmp(opt_array[_i].str, v)) { \ | |
167 | variable |= opt_array[_i].val; \ | |
168 | break; \ | |
169 | } \ | |
170 | if (!opt_array[_i].str || !*opt_array[_i].str) \ | |
171 | goto needs_val; \ | |
172 | } | |
173 | if (!opt || !*opt) | |
174 | goto no_mount_options; | |
175 | ntfs_debug("Entering with mount options string: %s", opt); | |
176 | while ((p = strsep(&opt, ","))) { | |
177 | if ((v = strchr(p, '='))) | |
178 | *v++ = 0; | |
b29f7751 EB |
179 | NTFS_GETOPT_UID("uid", uid) |
180 | else NTFS_GETOPT_GID("gid", gid) | |
5d46770f AA |
181 | else NTFS_GETOPT_OCTAL("umask", fmask = dmask) |
182 | else NTFS_GETOPT_OCTAL("fmask", fmask) | |
183 | else NTFS_GETOPT_OCTAL("dmask", dmask) | |
1da177e4 | 184 | else NTFS_GETOPT("mft_zone_multiplier", mft_zone_multiplier) |
c49c3111 | 185 | else NTFS_GETOPT_WITH_DEFAULT("sloppy", sloppy, true) |
1da177e4 LT |
186 | else NTFS_GETOPT_BOOL("show_sys_files", show_sys_files) |
187 | else NTFS_GETOPT_BOOL("case_sensitive", case_sensitive) | |
c002f425 | 188 | else NTFS_GETOPT_BOOL("disable_sparse", disable_sparse) |
1da177e4 LT |
189 | else NTFS_GETOPT_OPTIONS_ARRAY("errors", on_errors, |
190 | on_errors_arr) | |
191 | else if (!strcmp(p, "posix") || !strcmp(p, "show_inodes")) | |
192 | ntfs_warning(vol->sb, "Ignoring obsolete option %s.", | |
193 | p); | |
194 | else if (!strcmp(p, "nls") || !strcmp(p, "iocharset")) { | |
195 | if (!strcmp(p, "iocharset")) | |
196 | ntfs_warning(vol->sb, "Option iocharset is " | |
197 | "deprecated. Please use " | |
198 | "option nls=<charsetname> in " | |
199 | "the future."); | |
200 | if (!v || !*v) | |
201 | goto needs_arg; | |
202 | use_utf8: | |
203 | old_nls = nls_map; | |
204 | nls_map = load_nls(v); | |
205 | if (!nls_map) { | |
206 | if (!old_nls) { | |
207 | ntfs_error(vol->sb, "NLS character set " | |
208 | "%s not found.", v); | |
c49c3111 | 209 | return false; |
1da177e4 LT |
210 | } |
211 | ntfs_error(vol->sb, "NLS character set %s not " | |
212 | "found. Using previous one %s.", | |
213 | v, old_nls->charset); | |
214 | nls_map = old_nls; | |
215 | } else /* nls_map */ { | |
6d729e44 | 216 | unload_nls(old_nls); |
1da177e4 LT |
217 | } |
218 | } else if (!strcmp(p, "utf8")) { | |
c49c3111 | 219 | bool val = false; |
1da177e4 LT |
220 | ntfs_warning(vol->sb, "Option utf8 is no longer " |
221 | "supported, using option nls=utf8. Please " | |
222 | "use option nls=utf8 in the future and " | |
223 | "make sure utf8 is compiled either as a " | |
224 | "module or into the kernel."); | |
225 | if (!v || !*v) | |
c49c3111 | 226 | val = true; |
1da177e4 LT |
227 | else if (!simple_getbool(v, &val)) |
228 | goto needs_bool; | |
229 | if (val) { | |
230 | v = utf8; | |
231 | goto use_utf8; | |
232 | } | |
233 | } else { | |
234 | ntfs_error(vol->sb, "Unrecognized mount option %s.", p); | |
235 | if (errors < INT_MAX) | |
236 | errors++; | |
237 | } | |
238 | #undef NTFS_GETOPT_OPTIONS_ARRAY | |
239 | #undef NTFS_GETOPT_BOOL | |
240 | #undef NTFS_GETOPT | |
241 | #undef NTFS_GETOPT_WITH_DEFAULT | |
242 | } | |
243 | no_mount_options: | |
244 | if (errors && !sloppy) | |
c49c3111 | 245 | return false; |
1da177e4 LT |
246 | if (sloppy) |
247 | ntfs_warning(vol->sb, "Sloppy option given. Ignoring " | |
248 | "unrecognized mount option(s) and continuing."); | |
249 | /* Keep this first! */ | |
250 | if (on_errors != -1) { | |
251 | if (!on_errors) { | |
252 | ntfs_error(vol->sb, "Invalid errors option argument " | |
253 | "or bug in options parser."); | |
c49c3111 | 254 | return false; |
1da177e4 LT |
255 | } |
256 | } | |
257 | if (nls_map) { | |
258 | if (vol->nls_map && vol->nls_map != nls_map) { | |
259 | ntfs_error(vol->sb, "Cannot change NLS character set " | |
260 | "on remount."); | |
c49c3111 | 261 | return false; |
1da177e4 LT |
262 | } /* else (!vol->nls_map) */ |
263 | ntfs_debug("Using NLS character set %s.", nls_map->charset); | |
264 | vol->nls_map = nls_map; | |
265 | } else /* (!nls_map) */ { | |
266 | if (!vol->nls_map) { | |
267 | vol->nls_map = load_nls_default(); | |
268 | if (!vol->nls_map) { | |
269 | ntfs_error(vol->sb, "Failed to load default " | |
270 | "NLS character set."); | |
c49c3111 | 271 | return false; |
1da177e4 LT |
272 | } |
273 | ntfs_debug("Using default NLS character set (%s).", | |
274 | vol->nls_map->charset); | |
275 | } | |
276 | } | |
277 | if (mft_zone_multiplier != -1) { | |
278 | if (vol->mft_zone_multiplier && vol->mft_zone_multiplier != | |
279 | mft_zone_multiplier) { | |
280 | ntfs_error(vol->sb, "Cannot change mft_zone_multiplier " | |
281 | "on remount."); | |
c49c3111 | 282 | return false; |
1da177e4 LT |
283 | } |
284 | if (mft_zone_multiplier < 1 || mft_zone_multiplier > 4) { | |
285 | ntfs_error(vol->sb, "Invalid mft_zone_multiplier. " | |
286 | "Using default value, i.e. 1."); | |
287 | mft_zone_multiplier = 1; | |
288 | } | |
289 | vol->mft_zone_multiplier = mft_zone_multiplier; | |
290 | } | |
291 | if (!vol->mft_zone_multiplier) | |
292 | vol->mft_zone_multiplier = 1; | |
293 | if (on_errors != -1) | |
294 | vol->on_errors = on_errors; | |
295 | if (!vol->on_errors || vol->on_errors == ON_ERRORS_RECOVER) | |
296 | vol->on_errors |= ON_ERRORS_CONTINUE; | |
b29f7751 | 297 | if (uid_valid(uid)) |
1da177e4 | 298 | vol->uid = uid; |
b29f7751 | 299 | if (gid_valid(gid)) |
1da177e4 | 300 | vol->gid = gid; |
d0c00d06 | 301 | if (fmask != (umode_t)-1) |
1da177e4 | 302 | vol->fmask = fmask; |
d0c00d06 | 303 | if (dmask != (umode_t)-1) |
1da177e4 LT |
304 | vol->dmask = dmask; |
305 | if (show_sys_files != -1) { | |
306 | if (show_sys_files) | |
307 | NVolSetShowSystemFiles(vol); | |
308 | else | |
309 | NVolClearShowSystemFiles(vol); | |
310 | } | |
311 | if (case_sensitive != -1) { | |
312 | if (case_sensitive) | |
313 | NVolSetCaseSensitive(vol); | |
314 | else | |
315 | NVolClearCaseSensitive(vol); | |
316 | } | |
c002f425 AA |
317 | if (disable_sparse != -1) { |
318 | if (disable_sparse) | |
319 | NVolClearSparseEnabled(vol); | |
320 | else { | |
321 | if (!NVolSparseEnabled(vol) && | |
322 | vol->major_ver && vol->major_ver < 3) | |
323 | ntfs_warning(vol->sb, "Not enabling sparse " | |
324 | "support due to NTFS volume " | |
325 | "version %i.%i (need at least " | |
326 | "version 3.0).", vol->major_ver, | |
327 | vol->minor_ver); | |
328 | else | |
329 | NVolSetSparseEnabled(vol); | |
330 | } | |
331 | } | |
c49c3111 | 332 | return true; |
1da177e4 LT |
333 | needs_arg: |
334 | ntfs_error(vol->sb, "The %s option requires an argument.", p); | |
c49c3111 | 335 | return false; |
1da177e4 LT |
336 | needs_bool: |
337 | ntfs_error(vol->sb, "The %s option requires a boolean argument.", p); | |
c49c3111 | 338 | return false; |
1da177e4 LT |
339 | needs_val: |
340 | ntfs_error(vol->sb, "Invalid %s option argument: %s", p, ov); | |
c49c3111 | 341 | return false; |
1da177e4 LT |
342 | } |
343 | ||
344 | #ifdef NTFS_RW | |
345 | ||
346 | /** | |
347 | * ntfs_write_volume_flags - write new flags to the volume information flags | |
348 | * @vol: ntfs volume on which to modify the flags | |
349 | * @flags: new flags value for the volume information flags | |
350 | * | |
351 | * Internal function. You probably want to use ntfs_{set,clear}_volume_flags() | |
352 | * instead (see below). | |
353 | * | |
354 | * Replace the volume information flags on the volume @vol with the value | |
355 | * supplied in @flags. Note, this overwrites the volume information flags, so | |
356 | * make sure to combine the flags you want to modify with the old flags and use | |
357 | * the result when calling ntfs_write_volume_flags(). | |
358 | * | |
359 | * Return 0 on success and -errno on error. | |
360 | */ | |
361 | static int ntfs_write_volume_flags(ntfs_volume *vol, const VOLUME_FLAGS flags) | |
362 | { | |
363 | ntfs_inode *ni = NTFS_I(vol->vol_ino); | |
364 | MFT_RECORD *m; | |
365 | VOLUME_INFORMATION *vi; | |
366 | ntfs_attr_search_ctx *ctx; | |
367 | int err; | |
368 | ||
369 | ntfs_debug("Entering, old flags = 0x%x, new flags = 0x%x.", | |
370 | le16_to_cpu(vol->vol_flags), le16_to_cpu(flags)); | |
371 | if (vol->vol_flags == flags) | |
372 | goto done; | |
373 | BUG_ON(!ni); | |
374 | m = map_mft_record(ni); | |
375 | if (IS_ERR(m)) { | |
376 | err = PTR_ERR(m); | |
377 | goto err_out; | |
378 | } | |
379 | ctx = ntfs_attr_get_search_ctx(ni, m); | |
380 | if (!ctx) { | |
381 | err = -ENOMEM; | |
382 | goto put_unm_err_out; | |
383 | } | |
384 | err = ntfs_attr_lookup(AT_VOLUME_INFORMATION, NULL, 0, 0, 0, NULL, 0, | |
385 | ctx); | |
386 | if (err) | |
387 | goto put_unm_err_out; | |
388 | vi = (VOLUME_INFORMATION*)((u8*)ctx->attr + | |
389 | le16_to_cpu(ctx->attr->data.resident.value_offset)); | |
390 | vol->vol_flags = vi->flags = flags; | |
391 | flush_dcache_mft_record_page(ctx->ntfs_ino); | |
392 | mark_mft_record_dirty(ctx->ntfs_ino); | |
393 | ntfs_attr_put_search_ctx(ctx); | |
394 | unmap_mft_record(ni); | |
395 | done: | |
396 | ntfs_debug("Done."); | |
397 | return 0; | |
398 | put_unm_err_out: | |
399 | if (ctx) | |
400 | ntfs_attr_put_search_ctx(ctx); | |
401 | unmap_mft_record(ni); | |
402 | err_out: | |
403 | ntfs_error(vol->sb, "Failed with error code %i.", -err); | |
404 | return err; | |
405 | } | |
406 | ||
407 | /** | |
408 | * ntfs_set_volume_flags - set bits in the volume information flags | |
409 | * @vol: ntfs volume on which to modify the flags | |
410 | * @flags: flags to set on the volume | |
411 | * | |
412 | * Set the bits in @flags in the volume information flags on the volume @vol. | |
413 | * | |
414 | * Return 0 on success and -errno on error. | |
415 | */ | |
416 | static inline int ntfs_set_volume_flags(ntfs_volume *vol, VOLUME_FLAGS flags) | |
417 | { | |
418 | flags &= VOLUME_FLAGS_MASK; | |
419 | return ntfs_write_volume_flags(vol, vol->vol_flags | flags); | |
420 | } | |
421 | ||
422 | /** | |
423 | * ntfs_clear_volume_flags - clear bits in the volume information flags | |
424 | * @vol: ntfs volume on which to modify the flags | |
425 | * @flags: flags to clear on the volume | |
426 | * | |
427 | * Clear the bits in @flags in the volume information flags on the volume @vol. | |
428 | * | |
429 | * Return 0 on success and -errno on error. | |
430 | */ | |
431 | static inline int ntfs_clear_volume_flags(ntfs_volume *vol, VOLUME_FLAGS flags) | |
432 | { | |
433 | flags &= VOLUME_FLAGS_MASK; | |
434 | flags = vol->vol_flags & cpu_to_le16(~le16_to_cpu(flags)); | |
435 | return ntfs_write_volume_flags(vol, flags); | |
436 | } | |
437 | ||
438 | #endif /* NTFS_RW */ | |
439 | ||
440 | /** | |
441 | * ntfs_remount - change the mount options of a mounted ntfs filesystem | |
442 | * @sb: superblock of mounted ntfs filesystem | |
443 | * @flags: remount flags | |
444 | * @opt: remount options string | |
445 | * | |
446 | * Change the mount options of an already mounted ntfs filesystem. | |
447 | * | |
448 | * NOTE: The VFS sets the @sb->s_flags remount flags to @flags after | |
449 | * ntfs_remount() returns successfully (i.e. returns 0). Otherwise, | |
450 | * @sb->s_flags are not changed. | |
451 | */ | |
452 | static int ntfs_remount(struct super_block *sb, int *flags, char *opt) | |
453 | { | |
454 | ntfs_volume *vol = NTFS_SB(sb); | |
455 | ||
456 | ntfs_debug("Entering with remount options string: %s", opt); | |
337eb00a | 457 | |
02b9984d TT |
458 | sync_filesystem(sb); |
459 | ||
1da177e4 | 460 | #ifndef NTFS_RW |
24a44dca | 461 | /* For read-only compiled driver, enforce read-only flag. */ |
1751e8a6 | 462 | *flags |= SB_RDONLY; |
1da177e4 LT |
463 | #else /* NTFS_RW */ |
464 | /* | |
465 | * For the read-write compiled driver, if we are remounting read-write, | |
466 | * make sure there are no volume errors and that no unsupported volume | |
467 | * flags are set. Also, empty the logfile journal as it would become | |
468 | * stale as soon as something is written to the volume and mark the | |
469 | * volume dirty so that chkdsk is run if the volume is not umounted | |
470 | * cleanly. Finally, mark the quotas out of date so Windows rescans | |
471 | * the volume on boot and updates them. | |
472 | * | |
473 | * When remounting read-only, mark the volume clean if no volume errors | |
25985edc | 474 | * have occurred. |
1da177e4 | 475 | */ |
1751e8a6 | 476 | if (sb_rdonly(sb) && !(*flags & SB_RDONLY)) { |
1da177e4 LT |
477 | static const char *es = ". Cannot remount read-write."; |
478 | ||
479 | /* Remounting read-write. */ | |
480 | if (NVolErrors(vol)) { | |
481 | ntfs_error(sb, "Volume has errors and is read-only%s", | |
482 | es); | |
483 | return -EROFS; | |
484 | } | |
485 | if (vol->vol_flags & VOLUME_IS_DIRTY) { | |
486 | ntfs_error(sb, "Volume is dirty and read-only%s", es); | |
487 | return -EROFS; | |
488 | } | |
1cf3109f AA |
489 | if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) { |
490 | ntfs_error(sb, "Volume has been modified by chkdsk " | |
491 | "and is read-only%s", es); | |
492 | return -EROFS; | |
493 | } | |
1da177e4 | 494 | if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) { |
1cf3109f AA |
495 | ntfs_error(sb, "Volume has unsupported flags set " |
496 | "(0x%x) and is read-only%s", | |
497 | (unsigned)le16_to_cpu(vol->vol_flags), | |
498 | es); | |
1da177e4 LT |
499 | return -EROFS; |
500 | } | |
501 | if (ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) { | |
502 | ntfs_error(sb, "Failed to set dirty bit in volume " | |
503 | "information flags%s", es); | |
504 | return -EROFS; | |
505 | } | |
506 | #if 0 | |
507 | // TODO: Enable this code once we start modifying anything that | |
508 | // is different between NTFS 1.2 and 3.x... | |
509 | /* Set NT4 compatibility flag on newer NTFS version volumes. */ | |
510 | if ((vol->major_ver > 1)) { | |
511 | if (ntfs_set_volume_flags(vol, VOLUME_MOUNTED_ON_NT4)) { | |
512 | ntfs_error(sb, "Failed to set NT4 " | |
513 | "compatibility flag%s", es); | |
514 | NVolSetErrors(vol); | |
515 | return -EROFS; | |
516 | } | |
517 | } | |
518 | #endif | |
519 | if (!ntfs_empty_logfile(vol->logfile_ino)) { | |
520 | ntfs_error(sb, "Failed to empty journal $LogFile%s", | |
521 | es); | |
522 | NVolSetErrors(vol); | |
523 | return -EROFS; | |
524 | } | |
525 | if (!ntfs_mark_quotas_out_of_date(vol)) { | |
526 | ntfs_error(sb, "Failed to mark quotas out of date%s", | |
527 | es); | |
528 | NVolSetErrors(vol); | |
529 | return -EROFS; | |
530 | } | |
3f2faef0 | 531 | if (!ntfs_stamp_usnjrnl(vol)) { |
d31e7717 | 532 | ntfs_error(sb, "Failed to stamp transaction log " |
3f2faef0 AA |
533 | "($UsnJrnl)%s", es); |
534 | NVolSetErrors(vol); | |
535 | return -EROFS; | |
536 | } | |
1751e8a6 | 537 | } else if (!sb_rdonly(sb) && (*flags & SB_RDONLY)) { |
1da177e4 LT |
538 | /* Remounting read-only. */ |
539 | if (!NVolErrors(vol)) { | |
540 | if (ntfs_clear_volume_flags(vol, VOLUME_IS_DIRTY)) | |
541 | ntfs_warning(sb, "Failed to clear dirty bit " | |
542 | "in volume information " | |
543 | "flags. Run chkdsk."); | |
544 | } | |
545 | } | |
546 | #endif /* NTFS_RW */ | |
547 | ||
548 | // TODO: Deal with *flags. | |
549 | ||
efdffb54 | 550 | if (!parse_options(vol, opt)) |
1da177e4 | 551 | return -EINVAL; |
efdffb54 | 552 | |
1da177e4 LT |
553 | ntfs_debug("Done."); |
554 | return 0; | |
555 | } | |
556 | ||
557 | /** | |
558 | * is_boot_sector_ntfs - check whether a boot sector is a valid NTFS boot sector | |
559 | * @sb: Super block of the device to which @b belongs. | |
560 | * @b: Boot sector of device @sb to check. | |
c49c3111 | 561 | * @silent: If 'true', all output will be silenced. |
1da177e4 LT |
562 | * |
563 | * is_boot_sector_ntfs() checks whether the boot sector @b is a valid NTFS boot | |
c49c3111 | 564 | * sector. Returns 'true' if it is valid and 'false' if not. |
1da177e4 LT |
565 | * |
566 | * @sb is only needed for warning/error output, i.e. it can be NULL when silent | |
c49c3111 | 567 | * is 'true'. |
1da177e4 | 568 | */ |
c49c3111 RK |
569 | static bool is_boot_sector_ntfs(const struct super_block *sb, |
570 | const NTFS_BOOT_SECTOR *b, const bool silent) | |
1da177e4 LT |
571 | { |
572 | /* | |
573 | * Check that checksum == sum of u32 values from b to the checksum | |
b0d2374d AA |
574 | * field. If checksum is zero, no checking is done. We will work when |
575 | * the checksum test fails, since some utilities update the boot sector | |
576 | * ignoring the checksum which leaves the checksum out-of-date. We | |
577 | * report a warning if this is the case. | |
1da177e4 | 578 | */ |
b0d2374d | 579 | if ((void*)b < (void*)&b->checksum && b->checksum && !silent) { |
1da177e4 LT |
580 | le32 *u; |
581 | u32 i; | |
582 | ||
583 | for (i = 0, u = (le32*)b; u < (le32*)(&b->checksum); ++u) | |
584 | i += le32_to_cpup(u); | |
585 | if (le32_to_cpu(b->checksum) != i) | |
b0d2374d | 586 | ntfs_warning(sb, "Invalid boot sector checksum."); |
1da177e4 LT |
587 | } |
588 | /* Check OEMidentifier is "NTFS " */ | |
589 | if (b->oem_id != magicNTFS) | |
590 | goto not_ntfs; | |
591 | /* Check bytes per sector value is between 256 and 4096. */ | |
592 | if (le16_to_cpu(b->bpb.bytes_per_sector) < 0x100 || | |
593 | le16_to_cpu(b->bpb.bytes_per_sector) > 0x1000) | |
594 | goto not_ntfs; | |
595 | /* Check sectors per cluster value is valid. */ | |
596 | switch (b->bpb.sectors_per_cluster) { | |
597 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: case 128: | |
598 | break; | |
599 | default: | |
600 | goto not_ntfs; | |
601 | } | |
7fafb8b6 | 602 | /* Check the cluster size is not above the maximum (64kiB). */ |
1da177e4 | 603 | if ((u32)le16_to_cpu(b->bpb.bytes_per_sector) * |
7fafb8b6 | 604 | b->bpb.sectors_per_cluster > NTFS_MAX_CLUSTER_SIZE) |
1da177e4 LT |
605 | goto not_ntfs; |
606 | /* Check reserved/unused fields are really zero. */ | |
607 | if (le16_to_cpu(b->bpb.reserved_sectors) || | |
608 | le16_to_cpu(b->bpb.root_entries) || | |
609 | le16_to_cpu(b->bpb.sectors) || | |
610 | le16_to_cpu(b->bpb.sectors_per_fat) || | |
611 | le32_to_cpu(b->bpb.large_sectors) || b->bpb.fats) | |
612 | goto not_ntfs; | |
613 | /* Check clusters per file mft record value is valid. */ | |
614 | if ((u8)b->clusters_per_mft_record < 0xe1 || | |
615 | (u8)b->clusters_per_mft_record > 0xf7) | |
616 | switch (b->clusters_per_mft_record) { | |
617 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: | |
618 | break; | |
619 | default: | |
620 | goto not_ntfs; | |
621 | } | |
622 | /* Check clusters per index block value is valid. */ | |
623 | if ((u8)b->clusters_per_index_record < 0xe1 || | |
624 | (u8)b->clusters_per_index_record > 0xf7) | |
625 | switch (b->clusters_per_index_record) { | |
626 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: | |
627 | break; | |
628 | default: | |
629 | goto not_ntfs; | |
630 | } | |
631 | /* | |
632 | * Check for valid end of sector marker. We will work without it, but | |
633 | * many BIOSes will refuse to boot from a bootsector if the magic is | |
634 | * incorrect, so we emit a warning. | |
635 | */ | |
63cd8854 | 636 | if (!silent && b->end_of_sector_marker != cpu_to_le16(0xaa55)) |
1da177e4 | 637 | ntfs_warning(sb, "Invalid end of sector marker."); |
c49c3111 | 638 | return true; |
1da177e4 | 639 | not_ntfs: |
c49c3111 | 640 | return false; |
1da177e4 LT |
641 | } |
642 | ||
643 | /** | |
644 | * read_ntfs_boot_sector - read the NTFS boot sector of a device | |
645 | * @sb: super block of device to read the boot sector from | |
646 | * @silent: if true, suppress all output | |
647 | * | |
648 | * Reads the boot sector from the device and validates it. If that fails, tries | |
649 | * to read the backup boot sector, first from the end of the device a-la NT4 and | |
650 | * later and then from the middle of the device a-la NT3.51 and before. | |
651 | * | |
652 | * If a valid boot sector is found but it is not the primary boot sector, we | |
653 | * repair the primary boot sector silently (unless the device is read-only or | |
654 | * the primary boot sector is not accessible). | |
655 | * | |
656 | * NOTE: To call this function, @sb must have the fields s_dev, the ntfs super | |
657 | * block (u.ntfs_sb), nr_blocks and the device flags (s_flags) initialized | |
658 | * to their respective values. | |
659 | * | |
660 | * Return the unlocked buffer head containing the boot sector or NULL on error. | |
661 | */ | |
662 | static struct buffer_head *read_ntfs_boot_sector(struct super_block *sb, | |
663 | const int silent) | |
664 | { | |
665 | const char *read_err_str = "Unable to read %s boot sector."; | |
666 | struct buffer_head *bh_primary, *bh_backup; | |
78af34f0 | 667 | sector_t nr_blocks = NTFS_SB(sb)->nr_blocks; |
1da177e4 LT |
668 | |
669 | /* Try to read primary boot sector. */ | |
670 | if ((bh_primary = sb_bread(sb, 0))) { | |
671 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) | |
672 | bh_primary->b_data, silent)) | |
673 | return bh_primary; | |
674 | if (!silent) | |
675 | ntfs_error(sb, "Primary boot sector is invalid."); | |
676 | } else if (!silent) | |
677 | ntfs_error(sb, read_err_str, "primary"); | |
678 | if (!(NTFS_SB(sb)->on_errors & ON_ERRORS_RECOVER)) { | |
679 | if (bh_primary) | |
680 | brelse(bh_primary); | |
681 | if (!silent) | |
682 | ntfs_error(sb, "Mount option errors=recover not used. " | |
683 | "Aborting without trying to recover."); | |
684 | return NULL; | |
685 | } | |
686 | /* Try to read NT4+ backup boot sector. */ | |
687 | if ((bh_backup = sb_bread(sb, nr_blocks - 1))) { | |
688 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) | |
689 | bh_backup->b_data, silent)) | |
690 | goto hotfix_primary_boot_sector; | |
691 | brelse(bh_backup); | |
692 | } else if (!silent) | |
693 | ntfs_error(sb, read_err_str, "backup"); | |
694 | /* Try to read NT3.51- backup boot sector. */ | |
695 | if ((bh_backup = sb_bread(sb, nr_blocks >> 1))) { | |
696 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) | |
697 | bh_backup->b_data, silent)) | |
698 | goto hotfix_primary_boot_sector; | |
699 | if (!silent) | |
700 | ntfs_error(sb, "Could not find a valid backup boot " | |
701 | "sector."); | |
702 | brelse(bh_backup); | |
703 | } else if (!silent) | |
704 | ntfs_error(sb, read_err_str, "backup"); | |
705 | /* We failed. Cleanup and return. */ | |
706 | if (bh_primary) | |
707 | brelse(bh_primary); | |
708 | return NULL; | |
709 | hotfix_primary_boot_sector: | |
710 | if (bh_primary) { | |
711 | /* | |
712 | * If we managed to read sector zero and the volume is not | |
713 | * read-only, copy the found, valid backup boot sector to the | |
78af34f0 AA |
714 | * primary boot sector. Note we only copy the actual boot |
715 | * sector structure, not the actual whole device sector as that | |
716 | * may be bigger and would potentially damage the $Boot system | |
717 | * file (FIXME: Would be nice to know if the backup boot sector | |
718 | * on a large sector device contains the whole boot loader or | |
719 | * just the first 512 bytes). | |
1da177e4 | 720 | */ |
bc98a42c | 721 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
722 | ntfs_warning(sb, "Hot-fix: Recovering invalid primary " |
723 | "boot sector from backup copy."); | |
724 | memcpy(bh_primary->b_data, bh_backup->b_data, | |
78af34f0 | 725 | NTFS_BLOCK_SIZE); |
1da177e4 LT |
726 | mark_buffer_dirty(bh_primary); |
727 | sync_dirty_buffer(bh_primary); | |
728 | if (buffer_uptodate(bh_primary)) { | |
729 | brelse(bh_backup); | |
730 | return bh_primary; | |
731 | } | |
732 | ntfs_error(sb, "Hot-fix: Device write error while " | |
733 | "recovering primary boot sector."); | |
734 | } else { | |
735 | ntfs_warning(sb, "Hot-fix: Recovery of primary boot " | |
736 | "sector failed: Read-only mount."); | |
737 | } | |
738 | brelse(bh_primary); | |
739 | } | |
740 | ntfs_warning(sb, "Using backup boot sector."); | |
741 | return bh_backup; | |
742 | } | |
743 | ||
744 | /** | |
745 | * parse_ntfs_boot_sector - parse the boot sector and store the data in @vol | |
746 | * @vol: volume structure to initialise with data from boot sector | |
747 | * @b: boot sector to parse | |
748 | * | |
749 | * Parse the ntfs boot sector @b and store all imporant information therein in | |
c49c3111 | 750 | * the ntfs super block @vol. Return 'true' on success and 'false' on error. |
1da177e4 | 751 | */ |
c49c3111 | 752 | static bool parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b) |
1da177e4 LT |
753 | { |
754 | unsigned int sectors_per_cluster_bits, nr_hidden_sects; | |
755 | int clusters_per_mft_record, clusters_per_index_record; | |
756 | s64 ll; | |
757 | ||
758 | vol->sector_size = le16_to_cpu(b->bpb.bytes_per_sector); | |
759 | vol->sector_size_bits = ffs(vol->sector_size) - 1; | |
760 | ntfs_debug("vol->sector_size = %i (0x%x)", vol->sector_size, | |
761 | vol->sector_size); | |
762 | ntfs_debug("vol->sector_size_bits = %i (0x%x)", vol->sector_size_bits, | |
763 | vol->sector_size_bits); | |
78af34f0 AA |
764 | if (vol->sector_size < vol->sb->s_blocksize) { |
765 | ntfs_error(vol->sb, "Sector size (%i) is smaller than the " | |
766 | "device block size (%lu). This is not " | |
767 | "supported. Sorry.", vol->sector_size, | |
768 | vol->sb->s_blocksize); | |
c49c3111 | 769 | return false; |
78af34f0 | 770 | } |
1da177e4 LT |
771 | ntfs_debug("sectors_per_cluster = 0x%x", b->bpb.sectors_per_cluster); |
772 | sectors_per_cluster_bits = ffs(b->bpb.sectors_per_cluster) - 1; | |
773 | ntfs_debug("sectors_per_cluster_bits = 0x%x", | |
774 | sectors_per_cluster_bits); | |
775 | nr_hidden_sects = le32_to_cpu(b->bpb.hidden_sectors); | |
776 | ntfs_debug("number of hidden sectors = 0x%x", nr_hidden_sects); | |
777 | vol->cluster_size = vol->sector_size << sectors_per_cluster_bits; | |
778 | vol->cluster_size_mask = vol->cluster_size - 1; | |
779 | vol->cluster_size_bits = ffs(vol->cluster_size) - 1; | |
780 | ntfs_debug("vol->cluster_size = %i (0x%x)", vol->cluster_size, | |
781 | vol->cluster_size); | |
782 | ntfs_debug("vol->cluster_size_mask = 0x%x", vol->cluster_size_mask); | |
78af34f0 AA |
783 | ntfs_debug("vol->cluster_size_bits = %i", vol->cluster_size_bits); |
784 | if (vol->cluster_size < vol->sector_size) { | |
785 | ntfs_error(vol->sb, "Cluster size (%i) is smaller than the " | |
786 | "sector size (%i). This is not supported. " | |
787 | "Sorry.", vol->cluster_size, vol->sector_size); | |
c49c3111 | 788 | return false; |
1da177e4 LT |
789 | } |
790 | clusters_per_mft_record = b->clusters_per_mft_record; | |
791 | ntfs_debug("clusters_per_mft_record = %i (0x%x)", | |
792 | clusters_per_mft_record, clusters_per_mft_record); | |
793 | if (clusters_per_mft_record > 0) | |
794 | vol->mft_record_size = vol->cluster_size << | |
795 | (ffs(clusters_per_mft_record) - 1); | |
796 | else | |
797 | /* | |
798 | * When mft_record_size < cluster_size, clusters_per_mft_record | |
799 | * = -log2(mft_record_size) bytes. mft_record_size normaly is | |
800 | * 1024 bytes, which is encoded as 0xF6 (-10 in decimal). | |
801 | */ | |
802 | vol->mft_record_size = 1 << -clusters_per_mft_record; | |
803 | vol->mft_record_size_mask = vol->mft_record_size - 1; | |
804 | vol->mft_record_size_bits = ffs(vol->mft_record_size) - 1; | |
805 | ntfs_debug("vol->mft_record_size = %i (0x%x)", vol->mft_record_size, | |
806 | vol->mft_record_size); | |
807 | ntfs_debug("vol->mft_record_size_mask = 0x%x", | |
808 | vol->mft_record_size_mask); | |
809 | ntfs_debug("vol->mft_record_size_bits = %i (0x%x)", | |
810 | vol->mft_record_size_bits, vol->mft_record_size_bits); | |
811 | /* | |
ea1754a0 | 812 | * We cannot support mft record sizes above the PAGE_SIZE since |
1da177e4 LT |
813 | * we store $MFT/$DATA, the table of mft records in the page cache. |
814 | */ | |
09cbfeaf | 815 | if (vol->mft_record_size > PAGE_SIZE) { |
78af34f0 | 816 | ntfs_error(vol->sb, "Mft record size (%i) exceeds the " |
ea1754a0 | 817 | "PAGE_SIZE on your system (%lu). " |
1da177e4 | 818 | "This is not supported. Sorry.", |
09cbfeaf | 819 | vol->mft_record_size, PAGE_SIZE); |
c49c3111 | 820 | return false; |
78af34f0 AA |
821 | } |
822 | /* We cannot support mft record sizes below the sector size. */ | |
823 | if (vol->mft_record_size < vol->sector_size) { | |
824 | ntfs_error(vol->sb, "Mft record size (%i) is smaller than the " | |
825 | "sector size (%i). This is not supported. " | |
826 | "Sorry.", vol->mft_record_size, | |
827 | vol->sector_size); | |
c49c3111 | 828 | return false; |
1da177e4 LT |
829 | } |
830 | clusters_per_index_record = b->clusters_per_index_record; | |
831 | ntfs_debug("clusters_per_index_record = %i (0x%x)", | |
832 | clusters_per_index_record, clusters_per_index_record); | |
833 | if (clusters_per_index_record > 0) | |
834 | vol->index_record_size = vol->cluster_size << | |
835 | (ffs(clusters_per_index_record) - 1); | |
836 | else | |
837 | /* | |
838 | * When index_record_size < cluster_size, | |
839 | * clusters_per_index_record = -log2(index_record_size) bytes. | |
840 | * index_record_size normaly equals 4096 bytes, which is | |
841 | * encoded as 0xF4 (-12 in decimal). | |
842 | */ | |
843 | vol->index_record_size = 1 << -clusters_per_index_record; | |
844 | vol->index_record_size_mask = vol->index_record_size - 1; | |
845 | vol->index_record_size_bits = ffs(vol->index_record_size) - 1; | |
846 | ntfs_debug("vol->index_record_size = %i (0x%x)", | |
847 | vol->index_record_size, vol->index_record_size); | |
848 | ntfs_debug("vol->index_record_size_mask = 0x%x", | |
849 | vol->index_record_size_mask); | |
850 | ntfs_debug("vol->index_record_size_bits = %i (0x%x)", | |
851 | vol->index_record_size_bits, | |
852 | vol->index_record_size_bits); | |
78af34f0 AA |
853 | /* We cannot support index record sizes below the sector size. */ |
854 | if (vol->index_record_size < vol->sector_size) { | |
855 | ntfs_error(vol->sb, "Index record size (%i) is smaller than " | |
856 | "the sector size (%i). This is not " | |
857 | "supported. Sorry.", vol->index_record_size, | |
858 | vol->sector_size); | |
c49c3111 | 859 | return false; |
78af34f0 | 860 | } |
1da177e4 LT |
861 | /* |
862 | * Get the size of the volume in clusters and check for 64-bit-ness. | |
863 | * Windows currently only uses 32 bits to save the clusters so we do | |
864 | * the same as it is much faster on 32-bit CPUs. | |
865 | */ | |
866 | ll = sle64_to_cpu(b->number_of_sectors) >> sectors_per_cluster_bits; | |
867 | if ((u64)ll >= 1ULL << 32) { | |
868 | ntfs_error(vol->sb, "Cannot handle 64-bit clusters. Sorry."); | |
c49c3111 | 869 | return false; |
1da177e4 LT |
870 | } |
871 | vol->nr_clusters = ll; | |
872 | ntfs_debug("vol->nr_clusters = 0x%llx", (long long)vol->nr_clusters); | |
873 | /* | |
874 | * On an architecture where unsigned long is 32-bits, we restrict the | |
875 | * volume size to 2TiB (2^41). On a 64-bit architecture, the compiler | |
876 | * will hopefully optimize the whole check away. | |
877 | */ | |
878 | if (sizeof(unsigned long) < 8) { | |
879 | if ((ll << vol->cluster_size_bits) >= (1ULL << 41)) { | |
880 | ntfs_error(vol->sb, "Volume size (%lluTiB) is too " | |
881 | "large for this architecture. " | |
882 | "Maximum supported is 2TiB. Sorry.", | |
883 | (unsigned long long)ll >> (40 - | |
884 | vol->cluster_size_bits)); | |
c49c3111 | 885 | return false; |
1da177e4 LT |
886 | } |
887 | } | |
888 | ll = sle64_to_cpu(b->mft_lcn); | |
889 | if (ll >= vol->nr_clusters) { | |
78af34f0 AA |
890 | ntfs_error(vol->sb, "MFT LCN (%lli, 0x%llx) is beyond end of " |
891 | "volume. Weird.", (unsigned long long)ll, | |
892 | (unsigned long long)ll); | |
c49c3111 | 893 | return false; |
1da177e4 LT |
894 | } |
895 | vol->mft_lcn = ll; | |
896 | ntfs_debug("vol->mft_lcn = 0x%llx", (long long)vol->mft_lcn); | |
897 | ll = sle64_to_cpu(b->mftmirr_lcn); | |
898 | if (ll >= vol->nr_clusters) { | |
78af34f0 AA |
899 | ntfs_error(vol->sb, "MFTMirr LCN (%lli, 0x%llx) is beyond end " |
900 | "of volume. Weird.", (unsigned long long)ll, | |
901 | (unsigned long long)ll); | |
c49c3111 | 902 | return false; |
1da177e4 LT |
903 | } |
904 | vol->mftmirr_lcn = ll; | |
905 | ntfs_debug("vol->mftmirr_lcn = 0x%llx", (long long)vol->mftmirr_lcn); | |
906 | #ifdef NTFS_RW | |
907 | /* | |
908 | * Work out the size of the mft mirror in number of mft records. If the | |
909 | * cluster size is less than or equal to the size taken by four mft | |
910 | * records, the mft mirror stores the first four mft records. If the | |
911 | * cluster size is bigger than the size taken by four mft records, the | |
912 | * mft mirror contains as many mft records as will fit into one | |
913 | * cluster. | |
914 | */ | |
915 | if (vol->cluster_size <= (4 << vol->mft_record_size_bits)) | |
916 | vol->mftmirr_size = 4; | |
917 | else | |
918 | vol->mftmirr_size = vol->cluster_size >> | |
919 | vol->mft_record_size_bits; | |
920 | ntfs_debug("vol->mftmirr_size = %i", vol->mftmirr_size); | |
921 | #endif /* NTFS_RW */ | |
922 | vol->serial_no = le64_to_cpu(b->volume_serial_number); | |
923 | ntfs_debug("vol->serial_no = 0x%llx", | |
924 | (unsigned long long)vol->serial_no); | |
c49c3111 | 925 | return true; |
1da177e4 LT |
926 | } |
927 | ||
928 | /** | |
929 | * ntfs_setup_allocators - initialize the cluster and mft allocators | |
930 | * @vol: volume structure for which to setup the allocators | |
931 | * | |
932 | * Setup the cluster (lcn) and mft allocators to the starting values. | |
933 | */ | |
934 | static void ntfs_setup_allocators(ntfs_volume *vol) | |
935 | { | |
936 | #ifdef NTFS_RW | |
937 | LCN mft_zone_size, mft_lcn; | |
938 | #endif /* NTFS_RW */ | |
939 | ||
940 | ntfs_debug("vol->mft_zone_multiplier = 0x%x", | |
941 | vol->mft_zone_multiplier); | |
942 | #ifdef NTFS_RW | |
943 | /* Determine the size of the MFT zone. */ | |
944 | mft_zone_size = vol->nr_clusters; | |
945 | switch (vol->mft_zone_multiplier) { /* % of volume size in clusters */ | |
946 | case 4: | |
947 | mft_zone_size >>= 1; /* 50% */ | |
948 | break; | |
949 | case 3: | |
950 | mft_zone_size = (mft_zone_size + | |
951 | (mft_zone_size >> 1)) >> 2; /* 37.5% */ | |
952 | break; | |
953 | case 2: | |
954 | mft_zone_size >>= 2; /* 25% */ | |
955 | break; | |
956 | /* case 1: */ | |
957 | default: | |
958 | mft_zone_size >>= 3; /* 12.5% */ | |
959 | break; | |
960 | } | |
961 | /* Setup the mft zone. */ | |
962 | vol->mft_zone_start = vol->mft_zone_pos = vol->mft_lcn; | |
963 | ntfs_debug("vol->mft_zone_pos = 0x%llx", | |
964 | (unsigned long long)vol->mft_zone_pos); | |
965 | /* | |
966 | * Calculate the mft_lcn for an unmodified NTFS volume (see mkntfs | |
967 | * source) and if the actual mft_lcn is in the expected place or even | |
968 | * further to the front of the volume, extend the mft_zone to cover the | |
969 | * beginning of the volume as well. This is in order to protect the | |
970 | * area reserved for the mft bitmap as well within the mft_zone itself. | |
971 | * On non-standard volumes we do not protect it as the overhead would | |
972 | * be higher than the speed increase we would get by doing it. | |
973 | */ | |
974 | mft_lcn = (8192 + 2 * vol->cluster_size - 1) / vol->cluster_size; | |
975 | if (mft_lcn * vol->cluster_size < 16 * 1024) | |
976 | mft_lcn = (16 * 1024 + vol->cluster_size - 1) / | |
977 | vol->cluster_size; | |
978 | if (vol->mft_zone_start <= mft_lcn) | |
979 | vol->mft_zone_start = 0; | |
980 | ntfs_debug("vol->mft_zone_start = 0x%llx", | |
981 | (unsigned long long)vol->mft_zone_start); | |
982 | /* | |
983 | * Need to cap the mft zone on non-standard volumes so that it does | |
984 | * not point outside the boundaries of the volume. We do this by | |
985 | * halving the zone size until we are inside the volume. | |
986 | */ | |
987 | vol->mft_zone_end = vol->mft_lcn + mft_zone_size; | |
988 | while (vol->mft_zone_end >= vol->nr_clusters) { | |
989 | mft_zone_size >>= 1; | |
990 | vol->mft_zone_end = vol->mft_lcn + mft_zone_size; | |
991 | } | |
992 | ntfs_debug("vol->mft_zone_end = 0x%llx", | |
993 | (unsigned long long)vol->mft_zone_end); | |
994 | /* | |
995 | * Set the current position within each data zone to the start of the | |
996 | * respective zone. | |
997 | */ | |
998 | vol->data1_zone_pos = vol->mft_zone_end; | |
999 | ntfs_debug("vol->data1_zone_pos = 0x%llx", | |
1000 | (unsigned long long)vol->data1_zone_pos); | |
1001 | vol->data2_zone_pos = 0; | |
1002 | ntfs_debug("vol->data2_zone_pos = 0x%llx", | |
1003 | (unsigned long long)vol->data2_zone_pos); | |
1004 | ||
1005 | /* Set the mft data allocation position to mft record 24. */ | |
1006 | vol->mft_data_pos = 24; | |
1007 | ntfs_debug("vol->mft_data_pos = 0x%llx", | |
1008 | (unsigned long long)vol->mft_data_pos); | |
1009 | #endif /* NTFS_RW */ | |
1010 | } | |
1011 | ||
1012 | #ifdef NTFS_RW | |
1013 | ||
1014 | /** | |
1015 | * load_and_init_mft_mirror - load and setup the mft mirror inode for a volume | |
1016 | * @vol: ntfs super block describing device whose mft mirror to load | |
1017 | * | |
c49c3111 | 1018 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1019 | */ |
c49c3111 | 1020 | static bool load_and_init_mft_mirror(ntfs_volume *vol) |
1da177e4 LT |
1021 | { |
1022 | struct inode *tmp_ino; | |
1023 | ntfs_inode *tmp_ni; | |
1024 | ||
1025 | ntfs_debug("Entering."); | |
1026 | /* Get mft mirror inode. */ | |
1027 | tmp_ino = ntfs_iget(vol->sb, FILE_MFTMirr); | |
1028 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { | |
1029 | if (!IS_ERR(tmp_ino)) | |
1030 | iput(tmp_ino); | |
1031 | /* Caller will display error message. */ | |
c49c3111 | 1032 | return false; |
1da177e4 LT |
1033 | } |
1034 | /* | |
1035 | * Re-initialize some specifics about $MFTMirr's inode as | |
1036 | * ntfs_read_inode() will have set up the default ones. | |
1037 | */ | |
1038 | /* Set uid and gid to root. */ | |
b29f7751 EB |
1039 | tmp_ino->i_uid = GLOBAL_ROOT_UID; |
1040 | tmp_ino->i_gid = GLOBAL_ROOT_GID; | |
1da177e4 LT |
1041 | /* Regular file. No access for anyone. */ |
1042 | tmp_ino->i_mode = S_IFREG; | |
1043 | /* No VFS initiated operations allowed for $MFTMirr. */ | |
1044 | tmp_ino->i_op = &ntfs_empty_inode_ops; | |
1045 | tmp_ino->i_fop = &ntfs_empty_file_ops; | |
1046 | /* Put in our special address space operations. */ | |
1047 | tmp_ino->i_mapping->a_ops = &ntfs_mst_aops; | |
1048 | tmp_ni = NTFS_I(tmp_ino); | |
1049 | /* The $MFTMirr, like the $MFT is multi sector transfer protected. */ | |
1050 | NInoSetMstProtected(tmp_ni); | |
c002f425 | 1051 | NInoSetSparseDisabled(tmp_ni); |
1da177e4 LT |
1052 | /* |
1053 | * Set up our little cheat allowing us to reuse the async read io | |
1054 | * completion handler for directories. | |
1055 | */ | |
1056 | tmp_ni->itype.index.block_size = vol->mft_record_size; | |
1057 | tmp_ni->itype.index.block_size_bits = vol->mft_record_size_bits; | |
1058 | vol->mftmirr_ino = tmp_ino; | |
1059 | ntfs_debug("Done."); | |
c49c3111 | 1060 | return true; |
1da177e4 LT |
1061 | } |
1062 | ||
1063 | /** | |
1064 | * check_mft_mirror - compare contents of the mft mirror with the mft | |
1065 | * @vol: ntfs super block describing device whose mft mirror to check | |
1066 | * | |
c49c3111 | 1067 | * Return 'true' on success or 'false' on error. |
1da177e4 LT |
1068 | * |
1069 | * Note, this function also results in the mft mirror runlist being completely | |
1070 | * mapped into memory. The mft mirror write code requires this and will BUG() | |
1071 | * should it find an unmapped runlist element. | |
1072 | */ | |
c49c3111 | 1073 | static bool check_mft_mirror(ntfs_volume *vol) |
1da177e4 | 1074 | { |
1da177e4 LT |
1075 | struct super_block *sb = vol->sb; |
1076 | ntfs_inode *mirr_ni; | |
1077 | struct page *mft_page, *mirr_page; | |
1078 | u8 *kmft, *kmirr; | |
1079 | runlist_element *rl, rl2[2]; | |
218357ff | 1080 | pgoff_t index; |
1da177e4 LT |
1081 | int mrecs_per_page, i; |
1082 | ||
1083 | ntfs_debug("Entering."); | |
1084 | /* Compare contents of $MFT and $MFTMirr. */ | |
09cbfeaf | 1085 | mrecs_per_page = PAGE_SIZE / vol->mft_record_size; |
1da177e4 LT |
1086 | BUG_ON(!mrecs_per_page); |
1087 | BUG_ON(!vol->mftmirr_size); | |
1088 | mft_page = mirr_page = NULL; | |
1089 | kmft = kmirr = NULL; | |
1090 | index = i = 0; | |
1091 | do { | |
1092 | u32 bytes; | |
1093 | ||
1094 | /* Switch pages if necessary. */ | |
1095 | if (!(i % mrecs_per_page)) { | |
1096 | if (index) { | |
1097 | ntfs_unmap_page(mft_page); | |
1098 | ntfs_unmap_page(mirr_page); | |
1099 | } | |
1100 | /* Get the $MFT page. */ | |
1101 | mft_page = ntfs_map_page(vol->mft_ino->i_mapping, | |
1102 | index); | |
1103 | if (IS_ERR(mft_page)) { | |
1104 | ntfs_error(sb, "Failed to read $MFT."); | |
c49c3111 | 1105 | return false; |
1da177e4 LT |
1106 | } |
1107 | kmft = page_address(mft_page); | |
1108 | /* Get the $MFTMirr page. */ | |
1109 | mirr_page = ntfs_map_page(vol->mftmirr_ino->i_mapping, | |
1110 | index); | |
1111 | if (IS_ERR(mirr_page)) { | |
1112 | ntfs_error(sb, "Failed to read $MFTMirr."); | |
1113 | goto mft_unmap_out; | |
1114 | } | |
1115 | kmirr = page_address(mirr_page); | |
1116 | ++index; | |
1117 | } | |
949763b2 AA |
1118 | /* Do not check the record if it is not in use. */ |
1119 | if (((MFT_RECORD*)kmft)->flags & MFT_RECORD_IN_USE) { | |
1120 | /* Make sure the record is ok. */ | |
1121 | if (ntfs_is_baad_recordp((le32*)kmft)) { | |
1122 | ntfs_error(sb, "Incomplete multi sector " | |
1123 | "transfer detected in mft " | |
1124 | "record %i.", i); | |
1da177e4 | 1125 | mm_unmap_out: |
949763b2 | 1126 | ntfs_unmap_page(mirr_page); |
1da177e4 | 1127 | mft_unmap_out: |
949763b2 | 1128 | ntfs_unmap_page(mft_page); |
c49c3111 | 1129 | return false; |
949763b2 | 1130 | } |
1da177e4 | 1131 | } |
949763b2 AA |
1132 | /* Do not check the mirror record if it is not in use. */ |
1133 | if (((MFT_RECORD*)kmirr)->flags & MFT_RECORD_IN_USE) { | |
1134 | if (ntfs_is_baad_recordp((le32*)kmirr)) { | |
1135 | ntfs_error(sb, "Incomplete multi sector " | |
1136 | "transfer detected in mft " | |
1137 | "mirror record %i.", i); | |
1138 | goto mm_unmap_out; | |
1139 | } | |
1da177e4 LT |
1140 | } |
1141 | /* Get the amount of data in the current record. */ | |
1142 | bytes = le32_to_cpu(((MFT_RECORD*)kmft)->bytes_in_use); | |
949763b2 AA |
1143 | if (bytes < sizeof(MFT_RECORD_OLD) || |
1144 | bytes > vol->mft_record_size || | |
1145 | ntfs_is_baad_recordp((le32*)kmft)) { | |
1da177e4 | 1146 | bytes = le32_to_cpu(((MFT_RECORD*)kmirr)->bytes_in_use); |
949763b2 AA |
1147 | if (bytes < sizeof(MFT_RECORD_OLD) || |
1148 | bytes > vol->mft_record_size || | |
1149 | ntfs_is_baad_recordp((le32*)kmirr)) | |
1da177e4 LT |
1150 | bytes = vol->mft_record_size; |
1151 | } | |
1152 | /* Compare the two records. */ | |
1153 | if (memcmp(kmft, kmirr, bytes)) { | |
1154 | ntfs_error(sb, "$MFT and $MFTMirr (record %i) do not " | |
1155 | "match. Run ntfsfix or chkdsk.", i); | |
1156 | goto mm_unmap_out; | |
1157 | } | |
1158 | kmft += vol->mft_record_size; | |
1159 | kmirr += vol->mft_record_size; | |
1160 | } while (++i < vol->mftmirr_size); | |
1161 | /* Release the last pages. */ | |
1162 | ntfs_unmap_page(mft_page); | |
1163 | ntfs_unmap_page(mirr_page); | |
1164 | ||
1165 | /* Construct the mft mirror runlist by hand. */ | |
1166 | rl2[0].vcn = 0; | |
1167 | rl2[0].lcn = vol->mftmirr_lcn; | |
1168 | rl2[0].length = (vol->mftmirr_size * vol->mft_record_size + | |
1169 | vol->cluster_size - 1) / vol->cluster_size; | |
1170 | rl2[1].vcn = rl2[0].length; | |
1171 | rl2[1].lcn = LCN_ENOENT; | |
1172 | rl2[1].length = 0; | |
1173 | /* | |
1174 | * Because we have just read all of the mft mirror, we know we have | |
1175 | * mapped the full runlist for it. | |
1176 | */ | |
1177 | mirr_ni = NTFS_I(vol->mftmirr_ino); | |
1178 | down_read(&mirr_ni->runlist.lock); | |
1179 | rl = mirr_ni->runlist.rl; | |
1180 | /* Compare the two runlists. They must be identical. */ | |
1181 | i = 0; | |
1182 | do { | |
1183 | if (rl2[i].vcn != rl[i].vcn || rl2[i].lcn != rl[i].lcn || | |
1184 | rl2[i].length != rl[i].length) { | |
1185 | ntfs_error(sb, "$MFTMirr location mismatch. " | |
1186 | "Run chkdsk."); | |
1187 | up_read(&mirr_ni->runlist.lock); | |
c49c3111 | 1188 | return false; |
1da177e4 LT |
1189 | } |
1190 | } while (rl2[i++].length); | |
1191 | up_read(&mirr_ni->runlist.lock); | |
1192 | ntfs_debug("Done."); | |
c49c3111 | 1193 | return true; |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | /** | |
1197 | * load_and_check_logfile - load and check the logfile inode for a volume | |
1198 | * @vol: ntfs super block describing device whose logfile to load | |
1199 | * | |
c49c3111 | 1200 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1201 | */ |
c49c3111 | 1202 | static bool load_and_check_logfile(ntfs_volume *vol, |
e7a1033b | 1203 | RESTART_PAGE_HEADER **rp) |
1da177e4 LT |
1204 | { |
1205 | struct inode *tmp_ino; | |
1206 | ||
1207 | ntfs_debug("Entering."); | |
1208 | tmp_ino = ntfs_iget(vol->sb, FILE_LogFile); | |
1209 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { | |
1210 | if (!IS_ERR(tmp_ino)) | |
1211 | iput(tmp_ino); | |
1212 | /* Caller will display error message. */ | |
c49c3111 | 1213 | return false; |
1da177e4 | 1214 | } |
e7a1033b | 1215 | if (!ntfs_check_logfile(tmp_ino, rp)) { |
1da177e4 LT |
1216 | iput(tmp_ino); |
1217 | /* ntfs_check_logfile() will have displayed error output. */ | |
c49c3111 | 1218 | return false; |
1da177e4 | 1219 | } |
c002f425 | 1220 | NInoSetSparseDisabled(NTFS_I(tmp_ino)); |
1da177e4 LT |
1221 | vol->logfile_ino = tmp_ino; |
1222 | ntfs_debug("Done."); | |
c49c3111 | 1223 | return true; |
1da177e4 LT |
1224 | } |
1225 | ||
ca8fd7a0 AA |
1226 | #define NTFS_HIBERFIL_HEADER_SIZE 4096 |
1227 | ||
1228 | /** | |
1229 | * check_windows_hibernation_status - check if Windows is suspended on a volume | |
1230 | * @vol: ntfs super block of device to check | |
1231 | * | |
1232 | * Check if Windows is hibernated on the ntfs volume @vol. This is done by | |
1233 | * looking for the file hiberfil.sys in the root directory of the volume. If | |
1234 | * the file is not present Windows is definitely not suspended. | |
1235 | * | |
1236 | * If hiberfil.sys exists and is less than 4kiB in size it means Windows is | |
1237 | * definitely suspended (this volume is not the system volume). Caveat: on a | |
1238 | * system with many volumes it is possible that the < 4kiB check is bogus but | |
1239 | * for now this should do fine. | |
1240 | * | |
1241 | * If hiberfil.sys exists and is larger than 4kiB in size, we need to read the | |
1242 | * hiberfil header (which is the first 4kiB). If this begins with "hibr", | |
1243 | * Windows is definitely suspended. If it is completely full of zeroes, | |
1244 | * Windows is definitely not hibernated. Any other case is treated as if | |
1245 | * Windows is suspended. This caters for the above mentioned caveat of a | |
1246 | * system with many volumes where no "hibr" magic would be present and there is | |
1247 | * no zero header. | |
1248 | * | |
1249 | * Return 0 if Windows is not hibernated on the volume, >0 if Windows is | |
1250 | * hibernated on the volume, and -errno on error. | |
1251 | */ | |
1252 | static int check_windows_hibernation_status(ntfs_volume *vol) | |
1253 | { | |
1254 | MFT_REF mref; | |
1255 | struct inode *vi; | |
ca8fd7a0 AA |
1256 | struct page *page; |
1257 | u32 *kaddr, *kend; | |
1258 | ntfs_name *name = NULL; | |
1259 | int ret = 1; | |
63cd8854 HH |
1260 | static const ntfschar hiberfil[13] = { cpu_to_le16('h'), |
1261 | cpu_to_le16('i'), cpu_to_le16('b'), | |
1262 | cpu_to_le16('e'), cpu_to_le16('r'), | |
1263 | cpu_to_le16('f'), cpu_to_le16('i'), | |
1264 | cpu_to_le16('l'), cpu_to_le16('.'), | |
1265 | cpu_to_le16('s'), cpu_to_le16('y'), | |
1266 | cpu_to_le16('s'), 0 }; | |
ca8fd7a0 AA |
1267 | |
1268 | ntfs_debug("Entering."); | |
1269 | /* | |
1270 | * Find the inode number for the hibernation file by looking up the | |
1271 | * filename hiberfil.sys in the root directory. | |
1272 | */ | |
5955102c | 1273 | inode_lock(vol->root_ino); |
ca8fd7a0 AA |
1274 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->root_ino), hiberfil, 12, |
1275 | &name); | |
5955102c | 1276 | inode_unlock(vol->root_ino); |
ca8fd7a0 AA |
1277 | if (IS_ERR_MREF(mref)) { |
1278 | ret = MREF_ERR(mref); | |
1279 | /* If the file does not exist, Windows is not hibernated. */ | |
1280 | if (ret == -ENOENT) { | |
1281 | ntfs_debug("hiberfil.sys not present. Windows is not " | |
1282 | "hibernated on the volume."); | |
1283 | return 0; | |
1284 | } | |
25985edc | 1285 | /* A real error occurred. */ |
ca8fd7a0 AA |
1286 | ntfs_error(vol->sb, "Failed to find inode number for " |
1287 | "hiberfil.sys."); | |
1288 | return ret; | |
1289 | } | |
1290 | /* We do not care for the type of match that was found. */ | |
1291 | kfree(name); | |
1292 | /* Get the inode. */ | |
1293 | vi = ntfs_iget(vol->sb, MREF(mref)); | |
1294 | if (IS_ERR(vi) || is_bad_inode(vi)) { | |
1295 | if (!IS_ERR(vi)) | |
1296 | iput(vi); | |
1297 | ntfs_error(vol->sb, "Failed to load hiberfil.sys."); | |
1298 | return IS_ERR(vi) ? PTR_ERR(vi) : -EIO; | |
1299 | } | |
1300 | if (unlikely(i_size_read(vi) < NTFS_HIBERFIL_HEADER_SIZE)) { | |
1301 | ntfs_debug("hiberfil.sys is smaller than 4kiB (0x%llx). " | |
1302 | "Windows is hibernated on the volume. This " | |
1303 | "is not the system volume.", i_size_read(vi)); | |
1304 | goto iput_out; | |
1305 | } | |
ca8fd7a0 AA |
1306 | page = ntfs_map_page(vi->i_mapping, 0); |
1307 | if (IS_ERR(page)) { | |
1308 | ntfs_error(vol->sb, "Failed to read from hiberfil.sys."); | |
1309 | ret = PTR_ERR(page); | |
1310 | goto iput_out; | |
1311 | } | |
1312 | kaddr = (u32*)page_address(page); | |
63cd8854 | 1313 | if (*(le32*)kaddr == cpu_to_le32(0x72626968)/*'hibr'*/) { |
ca8fd7a0 AA |
1314 | ntfs_debug("Magic \"hibr\" found in hiberfil.sys. Windows is " |
1315 | "hibernated on the volume. This is the " | |
1316 | "system volume."); | |
1317 | goto unm_iput_out; | |
1318 | } | |
1319 | kend = kaddr + NTFS_HIBERFIL_HEADER_SIZE/sizeof(*kaddr); | |
1320 | do { | |
1321 | if (unlikely(*kaddr)) { | |
1322 | ntfs_debug("hiberfil.sys is larger than 4kiB " | |
1323 | "(0x%llx), does not contain the " | |
1324 | "\"hibr\" magic, and does not have a " | |
1325 | "zero header. Windows is hibernated " | |
1326 | "on the volume. This is not the " | |
1327 | "system volume.", i_size_read(vi)); | |
1328 | goto unm_iput_out; | |
1329 | } | |
1330 | } while (++kaddr < kend); | |
1331 | ntfs_debug("hiberfil.sys contains a zero header. Windows is not " | |
1332 | "hibernated on the volume. This is the system " | |
1333 | "volume."); | |
1334 | ret = 0; | |
1335 | unm_iput_out: | |
1336 | ntfs_unmap_page(page); | |
1337 | iput_out: | |
1338 | iput(vi); | |
1339 | return ret; | |
1340 | } | |
1341 | ||
1da177e4 LT |
1342 | /** |
1343 | * load_and_init_quota - load and setup the quota file for a volume if present | |
1344 | * @vol: ntfs super block describing device whose quota file to load | |
1345 | * | |
c49c3111 | 1346 | * Return 'true' on success or 'false' on error. If $Quota is not present, we |
1da177e4 LT |
1347 | * leave vol->quota_ino as NULL and return success. |
1348 | */ | |
c49c3111 | 1349 | static bool load_and_init_quota(ntfs_volume *vol) |
1da177e4 LT |
1350 | { |
1351 | MFT_REF mref; | |
1352 | struct inode *tmp_ino; | |
1353 | ntfs_name *name = NULL; | |
63cd8854 HH |
1354 | static const ntfschar Quota[7] = { cpu_to_le16('$'), |
1355 | cpu_to_le16('Q'), cpu_to_le16('u'), | |
1356 | cpu_to_le16('o'), cpu_to_le16('t'), | |
1357 | cpu_to_le16('a'), 0 }; | |
1358 | static ntfschar Q[3] = { cpu_to_le16('$'), | |
1359 | cpu_to_le16('Q'), 0 }; | |
1da177e4 LT |
1360 | |
1361 | ntfs_debug("Entering."); | |
1362 | /* | |
1363 | * Find the inode number for the quota file by looking up the filename | |
1364 | * $Quota in the extended system files directory $Extend. | |
1365 | */ | |
5955102c | 1366 | inode_lock(vol->extend_ino); |
1da177e4 LT |
1367 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), Quota, 6, |
1368 | &name); | |
5955102c | 1369 | inode_unlock(vol->extend_ino); |
1da177e4 LT |
1370 | if (IS_ERR_MREF(mref)) { |
1371 | /* | |
1372 | * If the file does not exist, quotas are disabled and have | |
1373 | * never been enabled on this volume, just return success. | |
1374 | */ | |
1375 | if (MREF_ERR(mref) == -ENOENT) { | |
1376 | ntfs_debug("$Quota not present. Volume does not have " | |
1377 | "quotas enabled."); | |
1378 | /* | |
1379 | * No need to try to set quotas out of date if they are | |
1380 | * not enabled. | |
1381 | */ | |
1382 | NVolSetQuotaOutOfDate(vol); | |
c49c3111 | 1383 | return true; |
1da177e4 | 1384 | } |
25985edc | 1385 | /* A real error occurred. */ |
1da177e4 | 1386 | ntfs_error(vol->sb, "Failed to find inode number for $Quota."); |
c49c3111 | 1387 | return false; |
1da177e4 LT |
1388 | } |
1389 | /* We do not care for the type of match that was found. */ | |
251c8427 | 1390 | kfree(name); |
1da177e4 LT |
1391 | /* Get the inode. */ |
1392 | tmp_ino = ntfs_iget(vol->sb, MREF(mref)); | |
1393 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { | |
1394 | if (!IS_ERR(tmp_ino)) | |
1395 | iput(tmp_ino); | |
1396 | ntfs_error(vol->sb, "Failed to load $Quota."); | |
c49c3111 | 1397 | return false; |
1da177e4 LT |
1398 | } |
1399 | vol->quota_ino = tmp_ino; | |
1400 | /* Get the $Q index allocation attribute. */ | |
1401 | tmp_ino = ntfs_index_iget(vol->quota_ino, Q, 2); | |
1402 | if (IS_ERR(tmp_ino)) { | |
1403 | ntfs_error(vol->sb, "Failed to load $Quota/$Q index."); | |
c49c3111 | 1404 | return false; |
1da177e4 LT |
1405 | } |
1406 | vol->quota_q_ino = tmp_ino; | |
1407 | ntfs_debug("Done."); | |
c49c3111 | 1408 | return true; |
1da177e4 LT |
1409 | } |
1410 | ||
3f2faef0 AA |
1411 | /** |
1412 | * load_and_init_usnjrnl - load and setup the transaction log if present | |
1413 | * @vol: ntfs super block describing device whose usnjrnl file to load | |
1414 | * | |
c49c3111 | 1415 | * Return 'true' on success or 'false' on error. |
3f2faef0 AA |
1416 | * |
1417 | * If $UsnJrnl is not present or in the process of being disabled, we set | |
1418 | * NVolUsnJrnlStamped() and return success. | |
1419 | * | |
1420 | * If the $UsnJrnl $DATA/$J attribute has a size equal to the lowest valid usn, | |
1421 | * i.e. transaction logging has only just been enabled or the journal has been | |
1422 | * stamped and nothing has been logged since, we also set NVolUsnJrnlStamped() | |
1423 | * and return success. | |
1424 | */ | |
c49c3111 | 1425 | static bool load_and_init_usnjrnl(ntfs_volume *vol) |
3f2faef0 AA |
1426 | { |
1427 | MFT_REF mref; | |
1428 | struct inode *tmp_ino; | |
1429 | ntfs_inode *tmp_ni; | |
1430 | struct page *page; | |
1431 | ntfs_name *name = NULL; | |
1432 | USN_HEADER *uh; | |
63cd8854 HH |
1433 | static const ntfschar UsnJrnl[9] = { cpu_to_le16('$'), |
1434 | cpu_to_le16('U'), cpu_to_le16('s'), | |
1435 | cpu_to_le16('n'), cpu_to_le16('J'), | |
1436 | cpu_to_le16('r'), cpu_to_le16('n'), | |
1437 | cpu_to_le16('l'), 0 }; | |
1438 | static ntfschar Max[5] = { cpu_to_le16('$'), | |
1439 | cpu_to_le16('M'), cpu_to_le16('a'), | |
1440 | cpu_to_le16('x'), 0 }; | |
1441 | static ntfschar J[3] = { cpu_to_le16('$'), | |
1442 | cpu_to_le16('J'), 0 }; | |
3f2faef0 AA |
1443 | |
1444 | ntfs_debug("Entering."); | |
1445 | /* | |
1446 | * Find the inode number for the transaction log file by looking up the | |
1447 | * filename $UsnJrnl in the extended system files directory $Extend. | |
1448 | */ | |
5955102c | 1449 | inode_lock(vol->extend_ino); |
3f2faef0 AA |
1450 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), UsnJrnl, 8, |
1451 | &name); | |
5955102c | 1452 | inode_unlock(vol->extend_ino); |
3f2faef0 AA |
1453 | if (IS_ERR_MREF(mref)) { |
1454 | /* | |
1455 | * If the file does not exist, transaction logging is disabled, | |
1456 | * just return success. | |
1457 | */ | |
1458 | if (MREF_ERR(mref) == -ENOENT) { | |
1459 | ntfs_debug("$UsnJrnl not present. Volume does not " | |
1460 | "have transaction logging enabled."); | |
1461 | not_enabled: | |
1462 | /* | |
1463 | * No need to try to stamp the transaction log if | |
1464 | * transaction logging is not enabled. | |
1465 | */ | |
1466 | NVolSetUsnJrnlStamped(vol); | |
c49c3111 | 1467 | return true; |
3f2faef0 | 1468 | } |
25985edc | 1469 | /* A real error occurred. */ |
3f2faef0 AA |
1470 | ntfs_error(vol->sb, "Failed to find inode number for " |
1471 | "$UsnJrnl."); | |
c49c3111 | 1472 | return false; |
3f2faef0 AA |
1473 | } |
1474 | /* We do not care for the type of match that was found. */ | |
1475 | kfree(name); | |
1476 | /* Get the inode. */ | |
1477 | tmp_ino = ntfs_iget(vol->sb, MREF(mref)); | |
cc22c800 | 1478 | if (IS_ERR(tmp_ino) || unlikely(is_bad_inode(tmp_ino))) { |
3f2faef0 AA |
1479 | if (!IS_ERR(tmp_ino)) |
1480 | iput(tmp_ino); | |
1481 | ntfs_error(vol->sb, "Failed to load $UsnJrnl."); | |
c49c3111 | 1482 | return false; |
3f2faef0 AA |
1483 | } |
1484 | vol->usnjrnl_ino = tmp_ino; | |
1485 | /* | |
1486 | * If the transaction log is in the process of being deleted, we can | |
1487 | * ignore it. | |
1488 | */ | |
1489 | if (unlikely(vol->vol_flags & VOLUME_DELETE_USN_UNDERWAY)) { | |
1490 | ntfs_debug("$UsnJrnl in the process of being disabled. " | |
1491 | "Volume does not have transaction logging " | |
1492 | "enabled."); | |
1493 | goto not_enabled; | |
1494 | } | |
1495 | /* Get the $DATA/$Max attribute. */ | |
1496 | tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, Max, 4); | |
1497 | if (IS_ERR(tmp_ino)) { | |
1498 | ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$Max " | |
1499 | "attribute."); | |
c49c3111 | 1500 | return false; |
3f2faef0 AA |
1501 | } |
1502 | vol->usnjrnl_max_ino = tmp_ino; | |
1503 | if (unlikely(i_size_read(tmp_ino) < sizeof(USN_HEADER))) { | |
1504 | ntfs_error(vol->sb, "Found corrupt $UsnJrnl/$DATA/$Max " | |
1505 | "attribute (size is 0x%llx but should be at " | |
d04bd1fb | 1506 | "least 0x%zx bytes).", i_size_read(tmp_ino), |
3f2faef0 | 1507 | sizeof(USN_HEADER)); |
c49c3111 | 1508 | return false; |
3f2faef0 AA |
1509 | } |
1510 | /* Get the $DATA/$J attribute. */ | |
1511 | tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, J, 2); | |
1512 | if (IS_ERR(tmp_ino)) { | |
1513 | ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$J " | |
1514 | "attribute."); | |
c49c3111 | 1515 | return false; |
3f2faef0 AA |
1516 | } |
1517 | vol->usnjrnl_j_ino = tmp_ino; | |
1518 | /* Verify $J is non-resident and sparse. */ | |
1519 | tmp_ni = NTFS_I(vol->usnjrnl_j_ino); | |
1520 | if (unlikely(!NInoNonResident(tmp_ni) || !NInoSparse(tmp_ni))) { | |
1521 | ntfs_error(vol->sb, "$UsnJrnl/$DATA/$J attribute is resident " | |
1522 | "and/or not sparse."); | |
c49c3111 | 1523 | return false; |
3f2faef0 AA |
1524 | } |
1525 | /* Read the USN_HEADER from $DATA/$Max. */ | |
1526 | page = ntfs_map_page(vol->usnjrnl_max_ino->i_mapping, 0); | |
1527 | if (IS_ERR(page)) { | |
1528 | ntfs_error(vol->sb, "Failed to read from $UsnJrnl/$DATA/$Max " | |
1529 | "attribute."); | |
c49c3111 | 1530 | return false; |
3f2faef0 AA |
1531 | } |
1532 | uh = (USN_HEADER*)page_address(page); | |
1533 | /* Sanity check the $Max. */ | |
1534 | if (unlikely(sle64_to_cpu(uh->allocation_delta) > | |
1535 | sle64_to_cpu(uh->maximum_size))) { | |
1536 | ntfs_error(vol->sb, "Allocation delta (0x%llx) exceeds " | |
1537 | "maximum size (0x%llx). $UsnJrnl is corrupt.", | |
1538 | (long long)sle64_to_cpu(uh->allocation_delta), | |
1539 | (long long)sle64_to_cpu(uh->maximum_size)); | |
1540 | ntfs_unmap_page(page); | |
c49c3111 | 1541 | return false; |
3f2faef0 AA |
1542 | } |
1543 | /* | |
1544 | * If the transaction log has been stamped and nothing has been written | |
1545 | * to it since, we do not need to stamp it. | |
1546 | */ | |
1547 | if (unlikely(sle64_to_cpu(uh->lowest_valid_usn) >= | |
1548 | i_size_read(vol->usnjrnl_j_ino))) { | |
1549 | if (likely(sle64_to_cpu(uh->lowest_valid_usn) == | |
1550 | i_size_read(vol->usnjrnl_j_ino))) { | |
1551 | ntfs_unmap_page(page); | |
1552 | ntfs_debug("$UsnJrnl is enabled but nothing has been " | |
1553 | "logged since it was last stamped. " | |
1554 | "Treating this as if the volume does " | |
1555 | "not have transaction logging " | |
1556 | "enabled."); | |
1557 | goto not_enabled; | |
1558 | } | |
1559 | ntfs_error(vol->sb, "$UsnJrnl has lowest valid usn (0x%llx) " | |
1560 | "which is out of bounds (0x%llx). $UsnJrnl " | |
1561 | "is corrupt.", | |
1562 | (long long)sle64_to_cpu(uh->lowest_valid_usn), | |
1563 | i_size_read(vol->usnjrnl_j_ino)); | |
1564 | ntfs_unmap_page(page); | |
c49c3111 | 1565 | return false; |
3f2faef0 AA |
1566 | } |
1567 | ntfs_unmap_page(page); | |
1568 | ntfs_debug("Done."); | |
c49c3111 | 1569 | return true; |
3f2faef0 AA |
1570 | } |
1571 | ||
1da177e4 LT |
1572 | /** |
1573 | * load_and_init_attrdef - load the attribute definitions table for a volume | |
1574 | * @vol: ntfs super block describing device whose attrdef to load | |
1575 | * | |
c49c3111 | 1576 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1577 | */ |
c49c3111 | 1578 | static bool load_and_init_attrdef(ntfs_volume *vol) |
1da177e4 | 1579 | { |
218357ff | 1580 | loff_t i_size; |
1da177e4 LT |
1581 | struct super_block *sb = vol->sb; |
1582 | struct inode *ino; | |
1583 | struct page *page; | |
218357ff | 1584 | pgoff_t index, max_index; |
1da177e4 LT |
1585 | unsigned int size; |
1586 | ||
1587 | ntfs_debug("Entering."); | |
1588 | /* Read attrdef table and setup vol->attrdef and vol->attrdef_size. */ | |
1589 | ino = ntfs_iget(sb, FILE_AttrDef); | |
1590 | if (IS_ERR(ino) || is_bad_inode(ino)) { | |
1591 | if (!IS_ERR(ino)) | |
1592 | iput(ino); | |
1593 | goto failed; | |
1594 | } | |
c002f425 | 1595 | NInoSetSparseDisabled(NTFS_I(ino)); |
1da177e4 | 1596 | /* The size of FILE_AttrDef must be above 0 and fit inside 31 bits. */ |
218357ff AA |
1597 | i_size = i_size_read(ino); |
1598 | if (i_size <= 0 || i_size > 0x7fffffff) | |
1da177e4 | 1599 | goto iput_failed; |
218357ff | 1600 | vol->attrdef = (ATTR_DEF*)ntfs_malloc_nofs(i_size); |
1da177e4 LT |
1601 | if (!vol->attrdef) |
1602 | goto iput_failed; | |
1603 | index = 0; | |
09cbfeaf KS |
1604 | max_index = i_size >> PAGE_SHIFT; |
1605 | size = PAGE_SIZE; | |
1da177e4 LT |
1606 | while (index < max_index) { |
1607 | /* Read the attrdef table and copy it into the linear buffer. */ | |
1608 | read_partial_attrdef_page: | |
1609 | page = ntfs_map_page(ino->i_mapping, index); | |
1610 | if (IS_ERR(page)) | |
1611 | goto free_iput_failed; | |
09cbfeaf | 1612 | memcpy((u8*)vol->attrdef + (index++ << PAGE_SHIFT), |
1da177e4 LT |
1613 | page_address(page), size); |
1614 | ntfs_unmap_page(page); | |
1615 | }; | |
09cbfeaf KS |
1616 | if (size == PAGE_SIZE) { |
1617 | size = i_size & ~PAGE_MASK; | |
1da177e4 LT |
1618 | if (size) |
1619 | goto read_partial_attrdef_page; | |
1620 | } | |
218357ff AA |
1621 | vol->attrdef_size = i_size; |
1622 | ntfs_debug("Read %llu bytes from $AttrDef.", i_size); | |
1da177e4 | 1623 | iput(ino); |
c49c3111 | 1624 | return true; |
1da177e4 LT |
1625 | free_iput_failed: |
1626 | ntfs_free(vol->attrdef); | |
1627 | vol->attrdef = NULL; | |
1628 | iput_failed: | |
1629 | iput(ino); | |
1630 | failed: | |
1631 | ntfs_error(sb, "Failed to initialize attribute definition table."); | |
c49c3111 | 1632 | return false; |
1da177e4 LT |
1633 | } |
1634 | ||
1635 | #endif /* NTFS_RW */ | |
1636 | ||
1637 | /** | |
1638 | * load_and_init_upcase - load the upcase table for an ntfs volume | |
1639 | * @vol: ntfs super block describing device whose upcase to load | |
1640 | * | |
c49c3111 | 1641 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1642 | */ |
c49c3111 | 1643 | static bool load_and_init_upcase(ntfs_volume *vol) |
1da177e4 | 1644 | { |
218357ff | 1645 | loff_t i_size; |
1da177e4 LT |
1646 | struct super_block *sb = vol->sb; |
1647 | struct inode *ino; | |
1648 | struct page *page; | |
218357ff | 1649 | pgoff_t index, max_index; |
1da177e4 LT |
1650 | unsigned int size; |
1651 | int i, max; | |
1652 | ||
1653 | ntfs_debug("Entering."); | |
1654 | /* Read upcase table and setup vol->upcase and vol->upcase_len. */ | |
1655 | ino = ntfs_iget(sb, FILE_UpCase); | |
1656 | if (IS_ERR(ino) || is_bad_inode(ino)) { | |
1657 | if (!IS_ERR(ino)) | |
1658 | iput(ino); | |
1659 | goto upcase_failed; | |
1660 | } | |
1661 | /* | |
1662 | * The upcase size must not be above 64k Unicode characters, must not | |
1663 | * be zero and must be a multiple of sizeof(ntfschar). | |
1664 | */ | |
218357ff AA |
1665 | i_size = i_size_read(ino); |
1666 | if (!i_size || i_size & (sizeof(ntfschar) - 1) || | |
1667 | i_size > 64ULL * 1024 * sizeof(ntfschar)) | |
1da177e4 | 1668 | goto iput_upcase_failed; |
218357ff | 1669 | vol->upcase = (ntfschar*)ntfs_malloc_nofs(i_size); |
1da177e4 LT |
1670 | if (!vol->upcase) |
1671 | goto iput_upcase_failed; | |
1672 | index = 0; | |
09cbfeaf KS |
1673 | max_index = i_size >> PAGE_SHIFT; |
1674 | size = PAGE_SIZE; | |
1da177e4 LT |
1675 | while (index < max_index) { |
1676 | /* Read the upcase table and copy it into the linear buffer. */ | |
1677 | read_partial_upcase_page: | |
1678 | page = ntfs_map_page(ino->i_mapping, index); | |
1679 | if (IS_ERR(page)) | |
1680 | goto iput_upcase_failed; | |
09cbfeaf | 1681 | memcpy((char*)vol->upcase + (index++ << PAGE_SHIFT), |
1da177e4 LT |
1682 | page_address(page), size); |
1683 | ntfs_unmap_page(page); | |
1684 | }; | |
09cbfeaf KS |
1685 | if (size == PAGE_SIZE) { |
1686 | size = i_size & ~PAGE_MASK; | |
1da177e4 LT |
1687 | if (size) |
1688 | goto read_partial_upcase_page; | |
1689 | } | |
218357ff | 1690 | vol->upcase_len = i_size >> UCHAR_T_SIZE_BITS; |
1da177e4 | 1691 | ntfs_debug("Read %llu bytes from $UpCase (expected %zu bytes).", |
218357ff | 1692 | i_size, 64 * 1024 * sizeof(ntfschar)); |
1da177e4 | 1693 | iput(ino); |
4e5e529a | 1694 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
1695 | if (!default_upcase) { |
1696 | ntfs_debug("Using volume specified $UpCase since default is " | |
1697 | "not present."); | |
4e5e529a | 1698 | mutex_unlock(&ntfs_lock); |
c49c3111 | 1699 | return true; |
1da177e4 LT |
1700 | } |
1701 | max = default_upcase_len; | |
1702 | if (max > vol->upcase_len) | |
1703 | max = vol->upcase_len; | |
1704 | for (i = 0; i < max; i++) | |
1705 | if (vol->upcase[i] != default_upcase[i]) | |
1706 | break; | |
1707 | if (i == max) { | |
1708 | ntfs_free(vol->upcase); | |
1709 | vol->upcase = default_upcase; | |
1710 | vol->upcase_len = max; | |
1711 | ntfs_nr_upcase_users++; | |
4e5e529a | 1712 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
1713 | ntfs_debug("Volume specified $UpCase matches default. Using " |
1714 | "default."); | |
c49c3111 | 1715 | return true; |
1da177e4 | 1716 | } |
4e5e529a | 1717 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
1718 | ntfs_debug("Using volume specified $UpCase since it does not match " |
1719 | "the default."); | |
c49c3111 | 1720 | return true; |
1da177e4 LT |
1721 | iput_upcase_failed: |
1722 | iput(ino); | |
1723 | ntfs_free(vol->upcase); | |
1724 | vol->upcase = NULL; | |
1725 | upcase_failed: | |
4e5e529a | 1726 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
1727 | if (default_upcase) { |
1728 | vol->upcase = default_upcase; | |
1729 | vol->upcase_len = default_upcase_len; | |
1730 | ntfs_nr_upcase_users++; | |
4e5e529a | 1731 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
1732 | ntfs_error(sb, "Failed to load $UpCase from the volume. Using " |
1733 | "default."); | |
c49c3111 | 1734 | return true; |
1da177e4 | 1735 | } |
4e5e529a | 1736 | mutex_unlock(&ntfs_lock); |
1da177e4 | 1737 | ntfs_error(sb, "Failed to initialize upcase table."); |
c49c3111 | 1738 | return false; |
1da177e4 LT |
1739 | } |
1740 | ||
59345374 IM |
1741 | /* |
1742 | * The lcn and mft bitmap inodes are NTFS-internal inodes with | |
1743 | * their own special locking rules: | |
1744 | */ | |
1745 | static struct lock_class_key | |
1746 | lcnbmp_runlist_lock_key, lcnbmp_mrec_lock_key, | |
1747 | mftbmp_runlist_lock_key, mftbmp_mrec_lock_key; | |
1748 | ||
1da177e4 LT |
1749 | /** |
1750 | * load_system_files - open the system files using normal functions | |
1751 | * @vol: ntfs super block describing device whose system files to load | |
1752 | * | |
1753 | * Open the system files with normal access functions and complete setting up | |
1754 | * the ntfs super block @vol. | |
1755 | * | |
c49c3111 | 1756 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1757 | */ |
c49c3111 | 1758 | static bool load_system_files(ntfs_volume *vol) |
1da177e4 LT |
1759 | { |
1760 | struct super_block *sb = vol->sb; | |
1761 | MFT_RECORD *m; | |
1762 | VOLUME_INFORMATION *vi; | |
1763 | ntfs_attr_search_ctx *ctx; | |
ca8fd7a0 | 1764 | #ifdef NTFS_RW |
7d333d6c | 1765 | RESTART_PAGE_HEADER *rp; |
ca8fd7a0 AA |
1766 | int err; |
1767 | #endif /* NTFS_RW */ | |
1da177e4 LT |
1768 | |
1769 | ntfs_debug("Entering."); | |
1770 | #ifdef NTFS_RW | |
1771 | /* Get mft mirror inode compare the contents of $MFT and $MFTMirr. */ | |
1772 | if (!load_and_init_mft_mirror(vol) || !check_mft_mirror(vol)) { | |
1773 | static const char *es1 = "Failed to load $MFTMirr"; | |
1774 | static const char *es2 = "$MFTMirr does not match $MFT"; | |
1775 | static const char *es3 = ". Run ntfsfix and/or chkdsk."; | |
1776 | ||
1777 | /* If a read-write mount, convert it to a read-only mount. */ | |
bc98a42c | 1778 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
1779 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
1780 | ON_ERRORS_CONTINUE))) { | |
1781 | ntfs_error(sb, "%s and neither on_errors=" | |
1782 | "continue nor on_errors=" | |
1783 | "remount-ro was specified%s", | |
1784 | !vol->mftmirr_ino ? es1 : es2, | |
1785 | es3); | |
1786 | goto iput_mirr_err_out; | |
1787 | } | |
1751e8a6 | 1788 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
1789 | ntfs_error(sb, "%s. Mounting read-only%s", |
1790 | !vol->mftmirr_ino ? es1 : es2, es3); | |
1791 | } else | |
1792 | ntfs_warning(sb, "%s. Will not be able to remount " | |
1793 | "read-write%s", | |
1794 | !vol->mftmirr_ino ? es1 : es2, es3); | |
1795 | /* This will prevent a read-write remount. */ | |
1796 | NVolSetErrors(vol); | |
1797 | } | |
1798 | #endif /* NTFS_RW */ | |
1799 | /* Get mft bitmap attribute inode. */ | |
1800 | vol->mftbmp_ino = ntfs_attr_iget(vol->mft_ino, AT_BITMAP, NULL, 0); | |
1801 | if (IS_ERR(vol->mftbmp_ino)) { | |
1802 | ntfs_error(sb, "Failed to load $MFT/$BITMAP attribute."); | |
1803 | goto iput_mirr_err_out; | |
1804 | } | |
59345374 IM |
1805 | lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->runlist.lock, |
1806 | &mftbmp_runlist_lock_key); | |
1807 | lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->mrec_lock, | |
1808 | &mftbmp_mrec_lock_key); | |
1da177e4 LT |
1809 | /* Read upcase table and setup @vol->upcase and @vol->upcase_len. */ |
1810 | if (!load_and_init_upcase(vol)) | |
1811 | goto iput_mftbmp_err_out; | |
1812 | #ifdef NTFS_RW | |
1813 | /* | |
1814 | * Read attribute definitions table and setup @vol->attrdef and | |
1815 | * @vol->attrdef_size. | |
1816 | */ | |
1817 | if (!load_and_init_attrdef(vol)) | |
1818 | goto iput_upcase_err_out; | |
1819 | #endif /* NTFS_RW */ | |
1820 | /* | |
1821 | * Get the cluster allocation bitmap inode and verify the size, no | |
1822 | * need for any locking at this stage as we are already running | |
1823 | * exclusively as we are mount in progress task. | |
1824 | */ | |
1825 | vol->lcnbmp_ino = ntfs_iget(sb, FILE_Bitmap); | |
1826 | if (IS_ERR(vol->lcnbmp_ino) || is_bad_inode(vol->lcnbmp_ino)) { | |
1827 | if (!IS_ERR(vol->lcnbmp_ino)) | |
1828 | iput(vol->lcnbmp_ino); | |
1829 | goto bitmap_failed; | |
1830 | } | |
59345374 IM |
1831 | lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->runlist.lock, |
1832 | &lcnbmp_runlist_lock_key); | |
1833 | lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->mrec_lock, | |
1834 | &lcnbmp_mrec_lock_key); | |
1835 | ||
c002f425 | 1836 | NInoSetSparseDisabled(NTFS_I(vol->lcnbmp_ino)); |
218357ff | 1837 | if ((vol->nr_clusters + 7) >> 3 > i_size_read(vol->lcnbmp_ino)) { |
1da177e4 LT |
1838 | iput(vol->lcnbmp_ino); |
1839 | bitmap_failed: | |
1840 | ntfs_error(sb, "Failed to load $Bitmap."); | |
1841 | goto iput_attrdef_err_out; | |
1842 | } | |
1843 | /* | |
1844 | * Get the volume inode and setup our cache of the volume flags and | |
1845 | * version. | |
1846 | */ | |
1847 | vol->vol_ino = ntfs_iget(sb, FILE_Volume); | |
1848 | if (IS_ERR(vol->vol_ino) || is_bad_inode(vol->vol_ino)) { | |
1849 | if (!IS_ERR(vol->vol_ino)) | |
1850 | iput(vol->vol_ino); | |
1851 | volume_failed: | |
1852 | ntfs_error(sb, "Failed to load $Volume."); | |
1853 | goto iput_lcnbmp_err_out; | |
1854 | } | |
1855 | m = map_mft_record(NTFS_I(vol->vol_ino)); | |
1856 | if (IS_ERR(m)) { | |
1857 | iput_volume_failed: | |
1858 | iput(vol->vol_ino); | |
1859 | goto volume_failed; | |
1860 | } | |
1861 | if (!(ctx = ntfs_attr_get_search_ctx(NTFS_I(vol->vol_ino), m))) { | |
1862 | ntfs_error(sb, "Failed to get attribute search context."); | |
1863 | goto get_ctx_vol_failed; | |
1864 | } | |
1865 | if (ntfs_attr_lookup(AT_VOLUME_INFORMATION, NULL, 0, 0, 0, NULL, 0, | |
1866 | ctx) || ctx->attr->non_resident || ctx->attr->flags) { | |
1867 | err_put_vol: | |
1868 | ntfs_attr_put_search_ctx(ctx); | |
1869 | get_ctx_vol_failed: | |
1870 | unmap_mft_record(NTFS_I(vol->vol_ino)); | |
1871 | goto iput_volume_failed; | |
1872 | } | |
1873 | vi = (VOLUME_INFORMATION*)((char*)ctx->attr + | |
1874 | le16_to_cpu(ctx->attr->data.resident.value_offset)); | |
1875 | /* Some bounds checks. */ | |
1876 | if ((u8*)vi < (u8*)ctx->attr || (u8*)vi + | |
1877 | le32_to_cpu(ctx->attr->data.resident.value_length) > | |
1878 | (u8*)ctx->attr + le32_to_cpu(ctx->attr->length)) | |
1879 | goto err_put_vol; | |
1880 | /* Copy the volume flags and version to the ntfs_volume structure. */ | |
1881 | vol->vol_flags = vi->flags; | |
1882 | vol->major_ver = vi->major_ver; | |
1883 | vol->minor_ver = vi->minor_ver; | |
1884 | ntfs_attr_put_search_ctx(ctx); | |
1885 | unmap_mft_record(NTFS_I(vol->vol_ino)); | |
87c1b497 | 1886 | pr_info("volume version %i.%i.\n", vol->major_ver, |
1da177e4 | 1887 | vol->minor_ver); |
c002f425 AA |
1888 | if (vol->major_ver < 3 && NVolSparseEnabled(vol)) { |
1889 | ntfs_warning(vol->sb, "Disabling sparse support due to NTFS " | |
1890 | "volume version %i.%i (need at least version " | |
1891 | "3.0).", vol->major_ver, vol->minor_ver); | |
1892 | NVolClearSparseEnabled(vol); | |
1893 | } | |
1da177e4 LT |
1894 | #ifdef NTFS_RW |
1895 | /* Make sure that no unsupported volume flags are set. */ | |
1896 | if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) { | |
1897 | static const char *es1a = "Volume is dirty"; | |
1cf3109f AA |
1898 | static const char *es1b = "Volume has been modified by chkdsk"; |
1899 | static const char *es1c = "Volume has unsupported flags set"; | |
1900 | static const char *es2a = ". Run chkdsk and mount in Windows."; | |
1901 | static const char *es2b = ". Mount in Windows."; | |
1902 | const char *es1, *es2; | |
1903 | ||
1904 | es2 = es2a; | |
1905 | if (vol->vol_flags & VOLUME_IS_DIRTY) | |
1906 | es1 = es1a; | |
1907 | else if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) { | |
1908 | es1 = es1b; | |
1909 | es2 = es2b; | |
1910 | } else { | |
1911 | es1 = es1c; | |
1912 | ntfs_warning(sb, "Unsupported volume flags 0x%x " | |
1913 | "encountered.", | |
1914 | (unsigned)le16_to_cpu(vol->vol_flags)); | |
1915 | } | |
1da177e4 | 1916 | /* If a read-write mount, convert it to a read-only mount. */ |
bc98a42c | 1917 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
1918 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
1919 | ON_ERRORS_CONTINUE))) { | |
1920 | ntfs_error(sb, "%s and neither on_errors=" | |
1921 | "continue nor on_errors=" | |
1922 | "remount-ro was specified%s", | |
1923 | es1, es2); | |
1924 | goto iput_vol_err_out; | |
1925 | } | |
1751e8a6 | 1926 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
1927 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
1928 | } else | |
1929 | ntfs_warning(sb, "%s. Will not be able to remount " | |
1930 | "read-write%s", es1, es2); | |
1931 | /* | |
1932 | * Do not set NVolErrors() because ntfs_remount() re-checks the | |
1933 | * flags which we need to do in case any flags have changed. | |
1934 | */ | |
1935 | } | |
1936 | /* | |
1937 | * Get the inode for the logfile, check it and determine if the volume | |
1938 | * was shutdown cleanly. | |
1939 | */ | |
e7a1033b AA |
1940 | rp = NULL; |
1941 | if (!load_and_check_logfile(vol, &rp) || | |
1942 | !ntfs_is_logfile_clean(vol->logfile_ino, rp)) { | |
1da177e4 LT |
1943 | static const char *es1a = "Failed to load $LogFile"; |
1944 | static const char *es1b = "$LogFile is not clean"; | |
1945 | static const char *es2 = ". Mount in Windows."; | |
1946 | const char *es1; | |
1947 | ||
1948 | es1 = !vol->logfile_ino ? es1a : es1b; | |
1949 | /* If a read-write mount, convert it to a read-only mount. */ | |
bc98a42c | 1950 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
1951 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
1952 | ON_ERRORS_CONTINUE))) { | |
1953 | ntfs_error(sb, "%s and neither on_errors=" | |
1954 | "continue nor on_errors=" | |
1955 | "remount-ro was specified%s", | |
1956 | es1, es2); | |
e7a1033b AA |
1957 | if (vol->logfile_ino) { |
1958 | BUG_ON(!rp); | |
1959 | ntfs_free(rp); | |
1960 | } | |
1da177e4 LT |
1961 | goto iput_logfile_err_out; |
1962 | } | |
1751e8a6 | 1963 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
1964 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
1965 | } else | |
1966 | ntfs_warning(sb, "%s. Will not be able to remount " | |
1967 | "read-write%s", es1, es2); | |
1968 | /* This will prevent a read-write remount. */ | |
1969 | NVolSetErrors(vol); | |
1970 | } | |
e7a1033b | 1971 | ntfs_free(rp); |
ca8fd7a0 AA |
1972 | #endif /* NTFS_RW */ |
1973 | /* Get the root directory inode so we can do path lookups. */ | |
1974 | vol->root_ino = ntfs_iget(sb, FILE_root); | |
1975 | if (IS_ERR(vol->root_ino) || is_bad_inode(vol->root_ino)) { | |
1976 | if (!IS_ERR(vol->root_ino)) | |
1977 | iput(vol->root_ino); | |
1978 | ntfs_error(sb, "Failed to load root directory."); | |
1979 | goto iput_logfile_err_out; | |
1980 | } | |
1981 | #ifdef NTFS_RW | |
1982 | /* | |
1983 | * Check if Windows is suspended to disk on the target volume. If it | |
1984 | * is hibernated, we must not write *anything* to the disk so set | |
1985 | * NVolErrors() without setting the dirty volume flag and mount | |
1986 | * read-only. This will prevent read-write remounting and it will also | |
1987 | * prevent all writes. | |
1988 | */ | |
1989 | err = check_windows_hibernation_status(vol); | |
1990 | if (unlikely(err)) { | |
1991 | static const char *es1a = "Failed to determine if Windows is " | |
1992 | "hibernated"; | |
1993 | static const char *es1b = "Windows is hibernated"; | |
1994 | static const char *es2 = ". Run chkdsk."; | |
1995 | const char *es1; | |
1996 | ||
1997 | es1 = err < 0 ? es1a : es1b; | |
1998 | /* If a read-write mount, convert it to a read-only mount. */ | |
bc98a42c | 1999 | if (!sb_rdonly(sb)) { |
ca8fd7a0 AA |
2000 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
2001 | ON_ERRORS_CONTINUE))) { | |
2002 | ntfs_error(sb, "%s and neither on_errors=" | |
2003 | "continue nor on_errors=" | |
2004 | "remount-ro was specified%s", | |
2005 | es1, es2); | |
2006 | goto iput_root_err_out; | |
2007 | } | |
1751e8a6 | 2008 | sb->s_flags |= SB_RDONLY; |
ca8fd7a0 AA |
2009 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
2010 | } else | |
2011 | ntfs_warning(sb, "%s. Will not be able to remount " | |
2012 | "read-write%s", es1, es2); | |
2013 | /* This will prevent a read-write remount. */ | |
2014 | NVolSetErrors(vol); | |
2015 | } | |
1da177e4 | 2016 | /* If (still) a read-write mount, mark the volume dirty. */ |
bc98a42c | 2017 | if (!sb_rdonly(sb) && ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) { |
1da177e4 LT |
2018 | static const char *es1 = "Failed to set dirty bit in volume " |
2019 | "information flags"; | |
2020 | static const char *es2 = ". Run chkdsk."; | |
2021 | ||
2022 | /* Convert to a read-only mount. */ | |
2023 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2024 | ON_ERRORS_CONTINUE))) { | |
2025 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2026 | "on_errors=remount-ro was specified%s", | |
2027 | es1, es2); | |
ca8fd7a0 | 2028 | goto iput_root_err_out; |
1da177e4 LT |
2029 | } |
2030 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
1751e8a6 | 2031 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
2032 | /* |
2033 | * Do not set NVolErrors() because ntfs_remount() might manage | |
2034 | * to set the dirty flag in which case all would be well. | |
2035 | */ | |
2036 | } | |
2037 | #if 0 | |
2038 | // TODO: Enable this code once we start modifying anything that is | |
2039 | // different between NTFS 1.2 and 3.x... | |
2040 | /* | |
2041 | * If (still) a read-write mount, set the NT4 compatibility flag on | |
2042 | * newer NTFS version volumes. | |
2043 | */ | |
1751e8a6 | 2044 | if (!(sb->s_flags & SB_RDONLY) && (vol->major_ver > 1) && |
1da177e4 LT |
2045 | ntfs_set_volume_flags(vol, VOLUME_MOUNTED_ON_NT4)) { |
2046 | static const char *es1 = "Failed to set NT4 compatibility flag"; | |
2047 | static const char *es2 = ". Run chkdsk."; | |
2048 | ||
2049 | /* Convert to a read-only mount. */ | |
2050 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2051 | ON_ERRORS_CONTINUE))) { | |
2052 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2053 | "on_errors=remount-ro was specified%s", | |
2054 | es1, es2); | |
ca8fd7a0 | 2055 | goto iput_root_err_out; |
1da177e4 LT |
2056 | } |
2057 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
1751e8a6 | 2058 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
2059 | NVolSetErrors(vol); |
2060 | } | |
2061 | #endif | |
2062 | /* If (still) a read-write mount, empty the logfile. */ | |
bc98a42c | 2063 | if (!sb_rdonly(sb) && !ntfs_empty_logfile(vol->logfile_ino)) { |
1da177e4 LT |
2064 | static const char *es1 = "Failed to empty $LogFile"; |
2065 | static const char *es2 = ". Mount in Windows."; | |
2066 | ||
2067 | /* Convert to a read-only mount. */ | |
2068 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2069 | ON_ERRORS_CONTINUE))) { | |
2070 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2071 | "on_errors=remount-ro was specified%s", | |
2072 | es1, es2); | |
ca8fd7a0 | 2073 | goto iput_root_err_out; |
1da177e4 LT |
2074 | } |
2075 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
1751e8a6 | 2076 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
2077 | NVolSetErrors(vol); |
2078 | } | |
2079 | #endif /* NTFS_RW */ | |
1da177e4 | 2080 | /* If on NTFS versions before 3.0, we are done. */ |
3f2faef0 | 2081 | if (unlikely(vol->major_ver < 3)) |
c49c3111 | 2082 | return true; |
1da177e4 LT |
2083 | /* NTFS 3.0+ specific initialization. */ |
2084 | /* Get the security descriptors inode. */ | |
2085 | vol->secure_ino = ntfs_iget(sb, FILE_Secure); | |
2086 | if (IS_ERR(vol->secure_ino) || is_bad_inode(vol->secure_ino)) { | |
2087 | if (!IS_ERR(vol->secure_ino)) | |
2088 | iput(vol->secure_ino); | |
2089 | ntfs_error(sb, "Failed to load $Secure."); | |
2090 | goto iput_root_err_out; | |
2091 | } | |
3f2faef0 | 2092 | // TODO: Initialize security. |
1da177e4 LT |
2093 | /* Get the extended system files' directory inode. */ |
2094 | vol->extend_ino = ntfs_iget(sb, FILE_Extend); | |
2095 | if (IS_ERR(vol->extend_ino) || is_bad_inode(vol->extend_ino)) { | |
2096 | if (!IS_ERR(vol->extend_ino)) | |
2097 | iput(vol->extend_ino); | |
2098 | ntfs_error(sb, "Failed to load $Extend."); | |
2099 | goto iput_sec_err_out; | |
2100 | } | |
2101 | #ifdef NTFS_RW | |
2102 | /* Find the quota file, load it if present, and set it up. */ | |
2103 | if (!load_and_init_quota(vol)) { | |
2104 | static const char *es1 = "Failed to load $Quota"; | |
2105 | static const char *es2 = ". Run chkdsk."; | |
2106 | ||
2107 | /* If a read-write mount, convert it to a read-only mount. */ | |
bc98a42c | 2108 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
2109 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
2110 | ON_ERRORS_CONTINUE))) { | |
2111 | ntfs_error(sb, "%s and neither on_errors=" | |
2112 | "continue nor on_errors=" | |
2113 | "remount-ro was specified%s", | |
2114 | es1, es2); | |
2115 | goto iput_quota_err_out; | |
2116 | } | |
1751e8a6 | 2117 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
2118 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
2119 | } else | |
2120 | ntfs_warning(sb, "%s. Will not be able to remount " | |
2121 | "read-write%s", es1, es2); | |
2122 | /* This will prevent a read-write remount. */ | |
2123 | NVolSetErrors(vol); | |
2124 | } | |
2125 | /* If (still) a read-write mount, mark the quotas out of date. */ | |
bc98a42c | 2126 | if (!sb_rdonly(sb) && !ntfs_mark_quotas_out_of_date(vol)) { |
1da177e4 LT |
2127 | static const char *es1 = "Failed to mark quotas out of date"; |
2128 | static const char *es2 = ". Run chkdsk."; | |
2129 | ||
2130 | /* Convert to a read-only mount. */ | |
2131 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2132 | ON_ERRORS_CONTINUE))) { | |
2133 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2134 | "on_errors=remount-ro was specified%s", | |
2135 | es1, es2); | |
2136 | goto iput_quota_err_out; | |
2137 | } | |
2138 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
1751e8a6 | 2139 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
2140 | NVolSetErrors(vol); |
2141 | } | |
3f2faef0 AA |
2142 | /* |
2143 | * Find the transaction log file ($UsnJrnl), load it if present, check | |
2144 | * it, and set it up. | |
2145 | */ | |
2146 | if (!load_and_init_usnjrnl(vol)) { | |
2147 | static const char *es1 = "Failed to load $UsnJrnl"; | |
2148 | static const char *es2 = ". Run chkdsk."; | |
2149 | ||
2150 | /* If a read-write mount, convert it to a read-only mount. */ | |
bc98a42c | 2151 | if (!sb_rdonly(sb)) { |
3f2faef0 AA |
2152 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | |
2153 | ON_ERRORS_CONTINUE))) { | |
2154 | ntfs_error(sb, "%s and neither on_errors=" | |
2155 | "continue nor on_errors=" | |
2156 | "remount-ro was specified%s", | |
2157 | es1, es2); | |
2158 | goto iput_usnjrnl_err_out; | |
2159 | } | |
1751e8a6 | 2160 | sb->s_flags |= SB_RDONLY; |
3f2faef0 AA |
2161 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
2162 | } else | |
2163 | ntfs_warning(sb, "%s. Will not be able to remount " | |
2164 | "read-write%s", es1, es2); | |
2165 | /* This will prevent a read-write remount. */ | |
2166 | NVolSetErrors(vol); | |
2167 | } | |
2168 | /* If (still) a read-write mount, stamp the transaction log. */ | |
bc98a42c | 2169 | if (!sb_rdonly(sb) && !ntfs_stamp_usnjrnl(vol)) { |
3f2faef0 AA |
2170 | static const char *es1 = "Failed to stamp transaction log " |
2171 | "($UsnJrnl)"; | |
2172 | static const char *es2 = ". Run chkdsk."; | |
2173 | ||
2174 | /* Convert to a read-only mount. */ | |
2175 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2176 | ON_ERRORS_CONTINUE))) { | |
2177 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2178 | "on_errors=remount-ro was specified%s", | |
2179 | es1, es2); | |
2180 | goto iput_usnjrnl_err_out; | |
2181 | } | |
2182 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
1751e8a6 | 2183 | sb->s_flags |= SB_RDONLY; |
3f2faef0 AA |
2184 | NVolSetErrors(vol); |
2185 | } | |
1da177e4 | 2186 | #endif /* NTFS_RW */ |
c49c3111 | 2187 | return true; |
1da177e4 | 2188 | #ifdef NTFS_RW |
3f2faef0 | 2189 | iput_usnjrnl_err_out: |
917520e1 SME |
2190 | iput(vol->usnjrnl_j_ino); |
2191 | iput(vol->usnjrnl_max_ino); | |
2192 | iput(vol->usnjrnl_ino); | |
1da177e4 | 2193 | iput_quota_err_out: |
917520e1 SME |
2194 | iput(vol->quota_q_ino); |
2195 | iput(vol->quota_ino); | |
1da177e4 LT |
2196 | iput(vol->extend_ino); |
2197 | #endif /* NTFS_RW */ | |
2198 | iput_sec_err_out: | |
2199 | iput(vol->secure_ino); | |
2200 | iput_root_err_out: | |
2201 | iput(vol->root_ino); | |
2202 | iput_logfile_err_out: | |
2203 | #ifdef NTFS_RW | |
917520e1 | 2204 | iput(vol->logfile_ino); |
1da177e4 LT |
2205 | iput_vol_err_out: |
2206 | #endif /* NTFS_RW */ | |
2207 | iput(vol->vol_ino); | |
2208 | iput_lcnbmp_err_out: | |
2209 | iput(vol->lcnbmp_ino); | |
2210 | iput_attrdef_err_out: | |
2211 | vol->attrdef_size = 0; | |
2212 | if (vol->attrdef) { | |
2213 | ntfs_free(vol->attrdef); | |
2214 | vol->attrdef = NULL; | |
2215 | } | |
2216 | #ifdef NTFS_RW | |
2217 | iput_upcase_err_out: | |
2218 | #endif /* NTFS_RW */ | |
2219 | vol->upcase_len = 0; | |
4e5e529a | 2220 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2221 | if (vol->upcase == default_upcase) { |
2222 | ntfs_nr_upcase_users--; | |
2223 | vol->upcase = NULL; | |
2224 | } | |
4e5e529a | 2225 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2226 | if (vol->upcase) { |
2227 | ntfs_free(vol->upcase); | |
2228 | vol->upcase = NULL; | |
2229 | } | |
2230 | iput_mftbmp_err_out: | |
2231 | iput(vol->mftbmp_ino); | |
2232 | iput_mirr_err_out: | |
2233 | #ifdef NTFS_RW | |
917520e1 | 2234 | iput(vol->mftmirr_ino); |
1da177e4 | 2235 | #endif /* NTFS_RW */ |
c49c3111 | 2236 | return false; |
1da177e4 LT |
2237 | } |
2238 | ||
2239 | /** | |
2240 | * ntfs_put_super - called by the vfs to unmount a volume | |
2241 | * @sb: vfs superblock of volume to unmount | |
2242 | * | |
2243 | * ntfs_put_super() is called by the VFS (from fs/super.c::do_umount()) when | |
2244 | * the volume is being unmounted (umount system call has been invoked) and it | |
2245 | * releases all inodes and memory belonging to the NTFS specific part of the | |
2246 | * super block. | |
2247 | */ | |
2248 | static void ntfs_put_super(struct super_block *sb) | |
2249 | { | |
2250 | ntfs_volume *vol = NTFS_SB(sb); | |
2251 | ||
2252 | ntfs_debug("Entering."); | |
6cfd0148 | 2253 | |
1da177e4 LT |
2254 | #ifdef NTFS_RW |
2255 | /* | |
2256 | * Commit all inodes while they are still open in case some of them | |
2257 | * cause others to be dirtied. | |
2258 | */ | |
2259 | ntfs_commit_inode(vol->vol_ino); | |
2260 | ||
2261 | /* NTFS 3.0+ specific. */ | |
2262 | if (vol->major_ver >= 3) { | |
3f2faef0 AA |
2263 | if (vol->usnjrnl_j_ino) |
2264 | ntfs_commit_inode(vol->usnjrnl_j_ino); | |
2265 | if (vol->usnjrnl_max_ino) | |
2266 | ntfs_commit_inode(vol->usnjrnl_max_ino); | |
2267 | if (vol->usnjrnl_ino) | |
2268 | ntfs_commit_inode(vol->usnjrnl_ino); | |
1da177e4 LT |
2269 | if (vol->quota_q_ino) |
2270 | ntfs_commit_inode(vol->quota_q_ino); | |
2271 | if (vol->quota_ino) | |
2272 | ntfs_commit_inode(vol->quota_ino); | |
2273 | if (vol->extend_ino) | |
2274 | ntfs_commit_inode(vol->extend_ino); | |
2275 | if (vol->secure_ino) | |
2276 | ntfs_commit_inode(vol->secure_ino); | |
2277 | } | |
2278 | ||
2279 | ntfs_commit_inode(vol->root_ino); | |
2280 | ||
2281 | down_write(&vol->lcnbmp_lock); | |
2282 | ntfs_commit_inode(vol->lcnbmp_ino); | |
2283 | up_write(&vol->lcnbmp_lock); | |
2284 | ||
2285 | down_write(&vol->mftbmp_lock); | |
2286 | ntfs_commit_inode(vol->mftbmp_ino); | |
2287 | up_write(&vol->mftbmp_lock); | |
2288 | ||
2289 | if (vol->logfile_ino) | |
2290 | ntfs_commit_inode(vol->logfile_ino); | |
2291 | ||
2292 | if (vol->mftmirr_ino) | |
2293 | ntfs_commit_inode(vol->mftmirr_ino); | |
2294 | ntfs_commit_inode(vol->mft_ino); | |
2295 | ||
2296 | /* | |
25985edc | 2297 | * If a read-write mount and no volume errors have occurred, mark the |
1da177e4 LT |
2298 | * volume clean. Also, re-commit all affected inodes. |
2299 | */ | |
bc98a42c | 2300 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
2301 | if (!NVolErrors(vol)) { |
2302 | if (ntfs_clear_volume_flags(vol, VOLUME_IS_DIRTY)) | |
2303 | ntfs_warning(sb, "Failed to clear dirty bit " | |
2304 | "in volume information " | |
2305 | "flags. Run chkdsk."); | |
2306 | ntfs_commit_inode(vol->vol_ino); | |
2307 | ntfs_commit_inode(vol->root_ino); | |
2308 | if (vol->mftmirr_ino) | |
2309 | ntfs_commit_inode(vol->mftmirr_ino); | |
2310 | ntfs_commit_inode(vol->mft_ino); | |
2311 | } else { | |
2312 | ntfs_warning(sb, "Volume has errors. Leaving volume " | |
2313 | "marked dirty. Run chkdsk."); | |
2314 | } | |
2315 | } | |
2316 | #endif /* NTFS_RW */ | |
2317 | ||
2318 | iput(vol->vol_ino); | |
2319 | vol->vol_ino = NULL; | |
2320 | ||
2321 | /* NTFS 3.0+ specific clean up. */ | |
2322 | if (vol->major_ver >= 3) { | |
2323 | #ifdef NTFS_RW | |
3f2faef0 AA |
2324 | if (vol->usnjrnl_j_ino) { |
2325 | iput(vol->usnjrnl_j_ino); | |
2326 | vol->usnjrnl_j_ino = NULL; | |
2327 | } | |
2328 | if (vol->usnjrnl_max_ino) { | |
2329 | iput(vol->usnjrnl_max_ino); | |
2330 | vol->usnjrnl_max_ino = NULL; | |
2331 | } | |
2332 | if (vol->usnjrnl_ino) { | |
2333 | iput(vol->usnjrnl_ino); | |
2334 | vol->usnjrnl_ino = NULL; | |
2335 | } | |
1da177e4 LT |
2336 | if (vol->quota_q_ino) { |
2337 | iput(vol->quota_q_ino); | |
2338 | vol->quota_q_ino = NULL; | |
2339 | } | |
2340 | if (vol->quota_ino) { | |
2341 | iput(vol->quota_ino); | |
2342 | vol->quota_ino = NULL; | |
2343 | } | |
2344 | #endif /* NTFS_RW */ | |
2345 | if (vol->extend_ino) { | |
2346 | iput(vol->extend_ino); | |
2347 | vol->extend_ino = NULL; | |
2348 | } | |
2349 | if (vol->secure_ino) { | |
2350 | iput(vol->secure_ino); | |
2351 | vol->secure_ino = NULL; | |
2352 | } | |
2353 | } | |
2354 | ||
2355 | iput(vol->root_ino); | |
2356 | vol->root_ino = NULL; | |
2357 | ||
2358 | down_write(&vol->lcnbmp_lock); | |
2359 | iput(vol->lcnbmp_ino); | |
2360 | vol->lcnbmp_ino = NULL; | |
2361 | up_write(&vol->lcnbmp_lock); | |
2362 | ||
2363 | down_write(&vol->mftbmp_lock); | |
2364 | iput(vol->mftbmp_ino); | |
2365 | vol->mftbmp_ino = NULL; | |
2366 | up_write(&vol->mftbmp_lock); | |
2367 | ||
2368 | #ifdef NTFS_RW | |
2369 | if (vol->logfile_ino) { | |
2370 | iput(vol->logfile_ino); | |
2371 | vol->logfile_ino = NULL; | |
2372 | } | |
2373 | if (vol->mftmirr_ino) { | |
2374 | /* Re-commit the mft mirror and mft just in case. */ | |
2375 | ntfs_commit_inode(vol->mftmirr_ino); | |
2376 | ntfs_commit_inode(vol->mft_ino); | |
2377 | iput(vol->mftmirr_ino); | |
2378 | vol->mftmirr_ino = NULL; | |
2379 | } | |
2380 | /* | |
13205fb9 JA |
2381 | * We should have no dirty inodes left, due to |
2382 | * mft.c::ntfs_mft_writepage() cleaning all the dirty pages as | |
2383 | * the underlying mft records are written out and cleaned. | |
1da177e4 LT |
2384 | */ |
2385 | ntfs_commit_inode(vol->mft_ino); | |
2386 | write_inode_now(vol->mft_ino, 1); | |
1da177e4 LT |
2387 | #endif /* NTFS_RW */ |
2388 | ||
2389 | iput(vol->mft_ino); | |
2390 | vol->mft_ino = NULL; | |
2391 | ||
2392 | /* Throw away the table of attribute definitions. */ | |
2393 | vol->attrdef_size = 0; | |
2394 | if (vol->attrdef) { | |
2395 | ntfs_free(vol->attrdef); | |
2396 | vol->attrdef = NULL; | |
2397 | } | |
2398 | vol->upcase_len = 0; | |
2399 | /* | |
2400 | * Destroy the global default upcase table if necessary. Also decrease | |
2401 | * the number of upcase users if we are a user. | |
2402 | */ | |
4e5e529a | 2403 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2404 | if (vol->upcase == default_upcase) { |
2405 | ntfs_nr_upcase_users--; | |
2406 | vol->upcase = NULL; | |
2407 | } | |
2408 | if (!ntfs_nr_upcase_users && default_upcase) { | |
2409 | ntfs_free(default_upcase); | |
2410 | default_upcase = NULL; | |
2411 | } | |
2412 | if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users) | |
2413 | free_compression_buffers(); | |
4e5e529a | 2414 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2415 | if (vol->upcase) { |
2416 | ntfs_free(vol->upcase); | |
2417 | vol->upcase = NULL; | |
2418 | } | |
6d729e44 TG |
2419 | |
2420 | unload_nls(vol->nls_map); | |
2421 | ||
1da177e4 LT |
2422 | sb->s_fs_info = NULL; |
2423 | kfree(vol); | |
1da177e4 LT |
2424 | } |
2425 | ||
2426 | /** | |
2427 | * get_nr_free_clusters - return the number of free clusters on a volume | |
2428 | * @vol: ntfs volume for which to obtain free cluster count | |
2429 | * | |
2430 | * Calculate the number of free clusters on the mounted NTFS volume @vol. We | |
2431 | * actually calculate the number of clusters in use instead because this | |
2432 | * allows us to not care about partial pages as these will be just zero filled | |
2433 | * and hence not be counted as allocated clusters. | |
2434 | * | |
2435 | * The only particularity is that clusters beyond the end of the logical ntfs | |
2436 | * volume will be marked as allocated to prevent errors which means we have to | |
2437 | * discount those at the end. This is important as the cluster bitmap always | |
2438 | * has a size in multiples of 8 bytes, i.e. up to 63 clusters could be outside | |
2439 | * the logical volume and marked in use when they are not as they do not exist. | |
2440 | * | |
2441 | * If any pages cannot be read we assume all clusters in the erroring pages are | |
2442 | * in use. This means we return an underestimate on errors which is better than | |
2443 | * an overestimate. | |
2444 | */ | |
2445 | static s64 get_nr_free_clusters(ntfs_volume *vol) | |
2446 | { | |
2447 | s64 nr_free = vol->nr_clusters; | |
1da177e4 | 2448 | struct address_space *mapping = vol->lcnbmp_ino->i_mapping; |
1da177e4 | 2449 | struct page *page; |
218357ff | 2450 | pgoff_t index, max_index; |
1da177e4 LT |
2451 | |
2452 | ntfs_debug("Entering."); | |
2453 | /* Serialize accesses to the cluster bitmap. */ | |
2454 | down_read(&vol->lcnbmp_lock); | |
2455 | /* | |
2456 | * Convert the number of bits into bytes rounded up, then convert into | |
ea1754a0 | 2457 | * multiples of PAGE_SIZE, rounding up so that if we have one |
1da177e4 LT |
2458 | * full and one partial page max_index = 2. |
2459 | */ | |
09cbfeaf KS |
2460 | max_index = (((vol->nr_clusters + 7) >> 3) + PAGE_SIZE - 1) >> |
2461 | PAGE_SHIFT; | |
ea1754a0 | 2462 | /* Use multiples of 4 bytes, thus max_size is PAGE_SIZE / 4. */ |
218357ff | 2463 | ntfs_debug("Reading $Bitmap, max_index = 0x%lx, max_size = 0x%lx.", |
09cbfeaf | 2464 | max_index, PAGE_SIZE / 4); |
218357ff | 2465 | for (index = 0; index < max_index; index++) { |
c4af9644 AM |
2466 | unsigned long *kaddr; |
2467 | ||
1da177e4 LT |
2468 | /* |
2469 | * Read the page from page cache, getting it from backing store | |
2470 | * if necessary, and increment the use count. | |
2471 | */ | |
6fe6900e | 2472 | page = read_mapping_page(mapping, index, NULL); |
1da177e4 LT |
2473 | /* Ignore pages which errored synchronously. */ |
2474 | if (IS_ERR(page)) { | |
6fe6900e | 2475 | ntfs_debug("read_mapping_page() error. Skipping " |
1da177e4 | 2476 | "page (index 0x%lx).", index); |
09cbfeaf | 2477 | nr_free -= PAGE_SIZE * 8; |
1da177e4 LT |
2478 | continue; |
2479 | } | |
a3ac1414 | 2480 | kaddr = kmap_atomic(page); |
1da177e4 | 2481 | /* |
c4af9644 | 2482 | * Subtract the number of set bits. If this |
1da177e4 LT |
2483 | * is the last page and it is partial we don't really care as |
2484 | * it just means we do a little extra work but it won't affect | |
2485 | * the result as all out of range bytes are set to zero by | |
2486 | * ntfs_readpage(). | |
2487 | */ | |
c4af9644 | 2488 | nr_free -= bitmap_weight(kaddr, |
09cbfeaf | 2489 | PAGE_SIZE * BITS_PER_BYTE); |
a3ac1414 | 2490 | kunmap_atomic(kaddr); |
09cbfeaf | 2491 | put_page(page); |
1da177e4 LT |
2492 | } |
2493 | ntfs_debug("Finished reading $Bitmap, last index = 0x%lx.", index - 1); | |
2494 | /* | |
2495 | * Fixup for eventual bits outside logical ntfs volume (see function | |
2496 | * description above). | |
2497 | */ | |
2498 | if (vol->nr_clusters & 63) | |
2499 | nr_free += 64 - (vol->nr_clusters & 63); | |
2500 | up_read(&vol->lcnbmp_lock); | |
25985edc | 2501 | /* If errors occurred we may well have gone below zero, fix this. */ |
1da177e4 LT |
2502 | if (nr_free < 0) |
2503 | nr_free = 0; | |
2504 | ntfs_debug("Exiting."); | |
2505 | return nr_free; | |
2506 | } | |
2507 | ||
2508 | /** | |
2509 | * __get_nr_free_mft_records - return the number of free inodes on a volume | |
2510 | * @vol: ntfs volume for which to obtain free inode count | |
c002f425 | 2511 | * @nr_free: number of mft records in filesystem |
218357ff | 2512 | * @max_index: maximum number of pages containing set bits |
1da177e4 LT |
2513 | * |
2514 | * Calculate the number of free mft records (inodes) on the mounted NTFS | |
2515 | * volume @vol. We actually calculate the number of mft records in use instead | |
2516 | * because this allows us to not care about partial pages as these will be just | |
2517 | * zero filled and hence not be counted as allocated mft record. | |
2518 | * | |
2519 | * If any pages cannot be read we assume all mft records in the erroring pages | |
2520 | * are in use. This means we return an underestimate on errors which is better | |
2521 | * than an overestimate. | |
2522 | * | |
2523 | * NOTE: Caller must hold mftbmp_lock rw_semaphore for reading or writing. | |
2524 | */ | |
218357ff AA |
2525 | static unsigned long __get_nr_free_mft_records(ntfs_volume *vol, |
2526 | s64 nr_free, const pgoff_t max_index) | |
1da177e4 | 2527 | { |
1da177e4 | 2528 | struct address_space *mapping = vol->mftbmp_ino->i_mapping; |
1da177e4 | 2529 | struct page *page; |
218357ff | 2530 | pgoff_t index; |
1da177e4 LT |
2531 | |
2532 | ntfs_debug("Entering."); | |
ea1754a0 | 2533 | /* Use multiples of 4 bytes, thus max_size is PAGE_SIZE / 4. */ |
1da177e4 | 2534 | ntfs_debug("Reading $MFT/$BITMAP, max_index = 0x%lx, max_size = " |
09cbfeaf | 2535 | "0x%lx.", max_index, PAGE_SIZE / 4); |
218357ff | 2536 | for (index = 0; index < max_index; index++) { |
c4af9644 AM |
2537 | unsigned long *kaddr; |
2538 | ||
1da177e4 LT |
2539 | /* |
2540 | * Read the page from page cache, getting it from backing store | |
2541 | * if necessary, and increment the use count. | |
2542 | */ | |
6fe6900e | 2543 | page = read_mapping_page(mapping, index, NULL); |
1da177e4 LT |
2544 | /* Ignore pages which errored synchronously. */ |
2545 | if (IS_ERR(page)) { | |
6fe6900e | 2546 | ntfs_debug("read_mapping_page() error. Skipping " |
1da177e4 | 2547 | "page (index 0x%lx).", index); |
09cbfeaf | 2548 | nr_free -= PAGE_SIZE * 8; |
1da177e4 LT |
2549 | continue; |
2550 | } | |
a3ac1414 | 2551 | kaddr = kmap_atomic(page); |
1da177e4 | 2552 | /* |
c4af9644 | 2553 | * Subtract the number of set bits. If this |
1da177e4 LT |
2554 | * is the last page and it is partial we don't really care as |
2555 | * it just means we do a little extra work but it won't affect | |
2556 | * the result as all out of range bytes are set to zero by | |
2557 | * ntfs_readpage(). | |
2558 | */ | |
c4af9644 | 2559 | nr_free -= bitmap_weight(kaddr, |
09cbfeaf | 2560 | PAGE_SIZE * BITS_PER_BYTE); |
a3ac1414 | 2561 | kunmap_atomic(kaddr); |
09cbfeaf | 2562 | put_page(page); |
1da177e4 LT |
2563 | } |
2564 | ntfs_debug("Finished reading $MFT/$BITMAP, last index = 0x%lx.", | |
2565 | index - 1); | |
25985edc | 2566 | /* If errors occurred we may well have gone below zero, fix this. */ |
1da177e4 LT |
2567 | if (nr_free < 0) |
2568 | nr_free = 0; | |
2569 | ntfs_debug("Exiting."); | |
2570 | return nr_free; | |
2571 | } | |
2572 | ||
2573 | /** | |
2574 | * ntfs_statfs - return information about mounted NTFS volume | |
726c3342 | 2575 | * @dentry: dentry from mounted volume |
1da177e4 LT |
2576 | * @sfs: statfs structure in which to return the information |
2577 | * | |
726c3342 | 2578 | * Return information about the mounted NTFS volume @dentry in the statfs structure |
1da177e4 LT |
2579 | * pointed to by @sfs (this is initialized with zeros before ntfs_statfs is |
2580 | * called). We interpret the values to be correct of the moment in time at | |
2581 | * which we are called. Most values are variable otherwise and this isn't just | |
2582 | * the free values but the totals as well. For example we can increase the | |
2583 | * total number of file nodes if we run out and we can keep doing this until | |
2584 | * there is no more space on the volume left at all. | |
2585 | * | |
2586 | * Called from vfs_statfs which is used to handle the statfs, fstatfs, and | |
2587 | * ustat system calls. | |
2588 | * | |
2589 | * Return 0 on success or -errno on error. | |
2590 | */ | |
726c3342 | 2591 | static int ntfs_statfs(struct dentry *dentry, struct kstatfs *sfs) |
1da177e4 | 2592 | { |
726c3342 | 2593 | struct super_block *sb = dentry->d_sb; |
1da177e4 | 2594 | s64 size; |
218357ff AA |
2595 | ntfs_volume *vol = NTFS_SB(sb); |
2596 | ntfs_inode *mft_ni = NTFS_I(vol->mft_ino); | |
2597 | pgoff_t max_index; | |
2598 | unsigned long flags; | |
1da177e4 LT |
2599 | |
2600 | ntfs_debug("Entering."); | |
2601 | /* Type of filesystem. */ | |
2602 | sfs->f_type = NTFS_SB_MAGIC; | |
2603 | /* Optimal transfer block size. */ | |
09cbfeaf | 2604 | sfs->f_bsize = PAGE_SIZE; |
1da177e4 | 2605 | /* |
c002f425 | 2606 | * Total data blocks in filesystem in units of f_bsize and since |
1da177e4 LT |
2607 | * inodes are also stored in data blocs ($MFT is a file) this is just |
2608 | * the total clusters. | |
2609 | */ | |
2610 | sfs->f_blocks = vol->nr_clusters << vol->cluster_size_bits >> | |
09cbfeaf | 2611 | PAGE_SHIFT; |
c002f425 | 2612 | /* Free data blocks in filesystem in units of f_bsize. */ |
1da177e4 | 2613 | size = get_nr_free_clusters(vol) << vol->cluster_size_bits >> |
09cbfeaf | 2614 | PAGE_SHIFT; |
1da177e4 LT |
2615 | if (size < 0LL) |
2616 | size = 0LL; | |
2617 | /* Free blocks avail to non-superuser, same as above on NTFS. */ | |
2618 | sfs->f_bavail = sfs->f_bfree = size; | |
2619 | /* Serialize accesses to the inode bitmap. */ | |
2620 | down_read(&vol->mftbmp_lock); | |
218357ff AA |
2621 | read_lock_irqsave(&mft_ni->size_lock, flags); |
2622 | size = i_size_read(vol->mft_ino) >> vol->mft_record_size_bits; | |
2623 | /* | |
2624 | * Convert the maximum number of set bits into bytes rounded up, then | |
ea1754a0 | 2625 | * convert into multiples of PAGE_SIZE, rounding up so that if we |
218357ff AA |
2626 | * have one full and one partial page max_index = 2. |
2627 | */ | |
2628 | max_index = ((((mft_ni->initialized_size >> vol->mft_record_size_bits) | |
09cbfeaf | 2629 | + 7) >> 3) + PAGE_SIZE - 1) >> PAGE_SHIFT; |
218357ff | 2630 | read_unlock_irqrestore(&mft_ni->size_lock, flags); |
c002f425 | 2631 | /* Number of inodes in filesystem (at this point in time). */ |
218357ff | 2632 | sfs->f_files = size; |
1da177e4 | 2633 | /* Free inodes in fs (based on current total count). */ |
218357ff | 2634 | sfs->f_ffree = __get_nr_free_mft_records(vol, size, max_index); |
1da177e4 LT |
2635 | up_read(&vol->mftbmp_lock); |
2636 | /* | |
2637 | * File system id. This is extremely *nix flavour dependent and even | |
2638 | * within Linux itself all fs do their own thing. I interpret this to | |
2639 | * mean a unique id associated with the mounted fs and not the id | |
c002f425 AA |
2640 | * associated with the filesystem driver, the latter is already given |
2641 | * by the filesystem type in sfs->f_type. Thus we use the 64-bit | |
1da177e4 LT |
2642 | * volume serial number splitting it into two 32-bit parts. We enter |
2643 | * the least significant 32-bits in f_fsid[0] and the most significant | |
2644 | * 32-bits in f_fsid[1]. | |
2645 | */ | |
2646 | sfs->f_fsid.val[0] = vol->serial_no & 0xffffffff; | |
2647 | sfs->f_fsid.val[1] = (vol->serial_no >> 32) & 0xffffffff; | |
2648 | /* Maximum length of filenames. */ | |
2649 | sfs->f_namelen = NTFS_MAX_NAME_LEN; | |
2650 | return 0; | |
2651 | } | |
2652 | ||
a9185b41 CH |
2653 | #ifdef NTFS_RW |
2654 | static int ntfs_write_inode(struct inode *vi, struct writeback_control *wbc) | |
2655 | { | |
2656 | return __ntfs_write_inode(vi, wbc->sync_mode == WB_SYNC_ALL); | |
2657 | } | |
2658 | #endif | |
2659 | ||
1da177e4 LT |
2660 | /** |
2661 | * The complete super operations. | |
2662 | */ | |
ee9b6d61 | 2663 | static const struct super_operations ntfs_sops = { |
1da177e4 | 2664 | .alloc_inode = ntfs_alloc_big_inode, /* VFS: Allocate new inode. */ |
a2b757fe | 2665 | .free_inode = ntfs_free_big_inode, /* VFS: Deallocate inode. */ |
1da177e4 | 2666 | #ifdef NTFS_RW |
1da177e4 LT |
2667 | .write_inode = ntfs_write_inode, /* VFS: Write dirty inode to |
2668 | disk. */ | |
1da177e4 LT |
2669 | #endif /* NTFS_RW */ |
2670 | .put_super = ntfs_put_super, /* Syscall: umount. */ | |
2671 | .statfs = ntfs_statfs, /* Syscall: statfs */ | |
2672 | .remount_fs = ntfs_remount, /* Syscall: mount -o remount. */ | |
b57922d9 | 2673 | .evict_inode = ntfs_evict_big_inode, /* VFS: Called when an inode is |
1da177e4 | 2674 | removed from memory. */ |
1da177e4 LT |
2675 | .show_options = ntfs_show_options, /* Show mount options in |
2676 | proc. */ | |
2677 | }; | |
2678 | ||
1da177e4 | 2679 | /** |
c002f425 AA |
2680 | * ntfs_fill_super - mount an ntfs filesystem |
2681 | * @sb: super block of ntfs filesystem to mount | |
1da177e4 LT |
2682 | * @opt: string containing the mount options |
2683 | * @silent: silence error output | |
2684 | * | |
2685 | * ntfs_fill_super() is called by the VFS to mount the device described by @sb | |
c002f425 | 2686 | * with the mount otions in @data with the NTFS filesystem. |
1da177e4 LT |
2687 | * |
2688 | * If @silent is true, remain silent even if errors are detected. This is used | |
c002f425 AA |
2689 | * during bootup, when the kernel tries to mount the root filesystem with all |
2690 | * registered filesystems one after the other until one succeeds. This implies | |
2691 | * that all filesystems except the correct one will quite correctly and | |
1da177e4 LT |
2692 | * expectedly return an error, but nobody wants to see error messages when in |
2693 | * fact this is what is supposed to happen. | |
2694 | * | |
2695 | * NOTE: @sb->s_flags contains the mount options flags. | |
2696 | */ | |
2697 | static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) | |
2698 | { | |
2699 | ntfs_volume *vol; | |
2700 | struct buffer_head *bh; | |
2701 | struct inode *tmp_ino; | |
78af34f0 | 2702 | int blocksize, result; |
1da177e4 | 2703 | |
59345374 IM |
2704 | /* |
2705 | * We do a pretty difficult piece of bootstrap by reading the | |
2706 | * MFT (and other metadata) from disk into memory. We'll only | |
2707 | * release this metadata during umount, so the locking patterns | |
2708 | * observed during bootstrap do not count. So turn off the | |
2709 | * observation of locking patterns (strictly for this context | |
2710 | * only) while mounting NTFS. [The validator is still active | |
2711 | * otherwise, even for this context: it will for example record | |
2712 | * lock class registrations.] | |
2713 | */ | |
2714 | lockdep_off(); | |
1da177e4 LT |
2715 | ntfs_debug("Entering."); |
2716 | #ifndef NTFS_RW | |
1751e8a6 | 2717 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
2718 | #endif /* ! NTFS_RW */ |
2719 | /* Allocate a new ntfs_volume and place it in sb->s_fs_info. */ | |
2720 | sb->s_fs_info = kmalloc(sizeof(ntfs_volume), GFP_NOFS); | |
2721 | vol = NTFS_SB(sb); | |
2722 | if (!vol) { | |
2723 | if (!silent) | |
2724 | ntfs_error(sb, "Allocation of NTFS volume structure " | |
2725 | "failed. Aborting mount..."); | |
59345374 | 2726 | lockdep_on(); |
1da177e4 LT |
2727 | return -ENOMEM; |
2728 | } | |
2729 | /* Initialize ntfs_volume structure. */ | |
442d207e AA |
2730 | *vol = (ntfs_volume) { |
2731 | .sb = sb, | |
2732 | /* | |
2733 | * Default is group and other don't have any access to files or | |
2734 | * directories while owner has full access. Further, files by | |
2735 | * default are not executable but directories are of course | |
2736 | * browseable. | |
2737 | */ | |
2738 | .fmask = 0177, | |
2739 | .dmask = 0077, | |
2740 | }; | |
1da177e4 | 2741 | init_rwsem(&vol->mftbmp_lock); |
1da177e4 | 2742 | init_rwsem(&vol->lcnbmp_lock); |
1da177e4 | 2743 | |
c002f425 AA |
2744 | /* By default, enable sparse support. */ |
2745 | NVolSetSparseEnabled(vol); | |
2746 | ||
1da177e4 LT |
2747 | /* Important to get the mount options dealt with now. */ |
2748 | if (!parse_options(vol, (char*)opt)) | |
2749 | goto err_out_now; | |
2750 | ||
ea1754a0 | 2751 | /* We support sector sizes up to the PAGE_SIZE. */ |
09cbfeaf | 2752 | if (bdev_logical_block_size(sb->s_bdev) > PAGE_SIZE) { |
78af34f0 AA |
2753 | if (!silent) |
2754 | ntfs_error(sb, "Device has unsupported sector size " | |
2755 | "(%i). The maximum supported sector " | |
2756 | "size on this architecture is %lu " | |
2757 | "bytes.", | |
e1defc4f | 2758 | bdev_logical_block_size(sb->s_bdev), |
09cbfeaf | 2759 | PAGE_SIZE); |
78af34f0 AA |
2760 | goto err_out_now; |
2761 | } | |
1da177e4 | 2762 | /* |
78af34f0 AA |
2763 | * Setup the device access block size to NTFS_BLOCK_SIZE or the hard |
2764 | * sector size, whichever is bigger. | |
1da177e4 | 2765 | */ |
78af34f0 AA |
2766 | blocksize = sb_min_blocksize(sb, NTFS_BLOCK_SIZE); |
2767 | if (blocksize < NTFS_BLOCK_SIZE) { | |
1da177e4 | 2768 | if (!silent) |
78af34f0 | 2769 | ntfs_error(sb, "Unable to set device block size."); |
1da177e4 LT |
2770 | goto err_out_now; |
2771 | } | |
78af34f0 AA |
2772 | BUG_ON(blocksize != sb->s_blocksize); |
2773 | ntfs_debug("Set device block size to %i bytes (block size bits %i).", | |
2774 | blocksize, sb->s_blocksize_bits); | |
2775 | /* Determine the size of the device in units of block_size bytes. */ | |
2776 | if (!i_size_read(sb->s_bdev->bd_inode)) { | |
1da177e4 | 2777 | if (!silent) |
78af34f0 | 2778 | ntfs_error(sb, "Unable to determine device size."); |
1da177e4 LT |
2779 | goto err_out_now; |
2780 | } | |
218357ff | 2781 | vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >> |
78af34f0 | 2782 | sb->s_blocksize_bits; |
1da177e4 LT |
2783 | /* Read the boot sector and return unlocked buffer head to it. */ |
2784 | if (!(bh = read_ntfs_boot_sector(sb, silent))) { | |
2785 | if (!silent) | |
2786 | ntfs_error(sb, "Not an NTFS volume."); | |
2787 | goto err_out_now; | |
2788 | } | |
1da177e4 | 2789 | /* |
78af34f0 | 2790 | * Extract the data from the boot sector and setup the ntfs volume |
1da177e4 LT |
2791 | * using it. |
2792 | */ | |
2793 | result = parse_ntfs_boot_sector(vol, (NTFS_BOOT_SECTOR*)bh->b_data); | |
1da177e4 | 2794 | brelse(bh); |
1da177e4 LT |
2795 | if (!result) { |
2796 | if (!silent) | |
2797 | ntfs_error(sb, "Unsupported NTFS filesystem."); | |
2798 | goto err_out_now; | |
2799 | } | |
1da177e4 | 2800 | /* |
78af34f0 AA |
2801 | * If the boot sector indicates a sector size bigger than the current |
2802 | * device block size, switch the device block size to the sector size. | |
2803 | * TODO: It may be possible to support this case even when the set | |
2804 | * below fails, we would just be breaking up the i/o for each sector | |
2805 | * into multiple blocks for i/o purposes but otherwise it should just | |
2806 | * work. However it is safer to leave disabled until someone hits this | |
2807 | * error message and then we can get them to try it without the setting | |
2808 | * so we know for sure that it works. | |
1da177e4 | 2809 | */ |
78af34f0 AA |
2810 | if (vol->sector_size > blocksize) { |
2811 | blocksize = sb_set_blocksize(sb, vol->sector_size); | |
2812 | if (blocksize != vol->sector_size) { | |
2813 | if (!silent) | |
2814 | ntfs_error(sb, "Unable to set device block " | |
2815 | "size to sector size (%i).", | |
2816 | vol->sector_size); | |
2817 | goto err_out_now; | |
2818 | } | |
2819 | BUG_ON(blocksize != sb->s_blocksize); | |
2820 | vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >> | |
2821 | sb->s_blocksize_bits; | |
2822 | ntfs_debug("Changed device block size to %i bytes (block size " | |
2823 | "bits %i) to match volume sector size.", | |
2824 | blocksize, sb->s_blocksize_bits); | |
2825 | } | |
2826 | /* Initialize the cluster and mft allocators. */ | |
2827 | ntfs_setup_allocators(vol); | |
1da177e4 LT |
2828 | /* Setup remaining fields in the super block. */ |
2829 | sb->s_magic = NTFS_SB_MAGIC; | |
1da177e4 LT |
2830 | /* |
2831 | * Ntfs allows 63 bits for the file size, i.e. correct would be: | |
2832 | * sb->s_maxbytes = ~0ULL >> 1; | |
2833 | * But the kernel uses a long as the page cache page index which on | |
2834 | * 32-bit architectures is only 32-bits. MAX_LFS_FILESIZE is kernel | |
2835 | * defined to the maximum the page cache page index can cope with | |
2836 | * without overflowing the index or to 2^63 - 1, whichever is smaller. | |
2837 | */ | |
2838 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
78af34f0 | 2839 | /* Ntfs measures time in 100ns intervals. */ |
1da177e4 | 2840 | sb->s_time_gran = 100; |
1da177e4 LT |
2841 | /* |
2842 | * Now load the metadata required for the page cache and our address | |
2843 | * space operations to function. We do this by setting up a specialised | |
2844 | * read_inode method and then just calling the normal iget() to obtain | |
2845 | * the inode for $MFT which is sufficient to allow our normal inode | |
2846 | * operations and associated address space operations to function. | |
2847 | */ | |
2848 | sb->s_op = &ntfs_sops; | |
2849 | tmp_ino = new_inode(sb); | |
2850 | if (!tmp_ino) { | |
2851 | if (!silent) | |
2852 | ntfs_error(sb, "Failed to load essential metadata."); | |
2853 | goto err_out_now; | |
2854 | } | |
2855 | tmp_ino->i_ino = FILE_MFT; | |
2856 | insert_inode_hash(tmp_ino); | |
2857 | if (ntfs_read_inode_mount(tmp_ino) < 0) { | |
2858 | if (!silent) | |
2859 | ntfs_error(sb, "Failed to load essential metadata."); | |
2860 | goto iput_tmp_ino_err_out_now; | |
2861 | } | |
4e5e529a | 2862 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2863 | /* |
2864 | * The current mount is a compression user if the cluster size is | |
2865 | * less than or equal 4kiB. | |
2866 | */ | |
2867 | if (vol->cluster_size <= 4096 && !ntfs_nr_compression_users++) { | |
2868 | result = allocate_compression_buffers(); | |
2869 | if (result) { | |
2870 | ntfs_error(NULL, "Failed to allocate buffers " | |
2871 | "for compression engine."); | |
2872 | ntfs_nr_compression_users--; | |
4e5e529a | 2873 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2874 | goto iput_tmp_ino_err_out_now; |
2875 | } | |
2876 | } | |
2877 | /* | |
2878 | * Generate the global default upcase table if necessary. Also | |
2879 | * temporarily increment the number of upcase users to avoid race | |
2880 | * conditions with concurrent (u)mounts. | |
2881 | */ | |
2882 | if (!default_upcase) | |
2883 | default_upcase = generate_default_upcase(); | |
2884 | ntfs_nr_upcase_users++; | |
4e5e529a | 2885 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2886 | /* |
2887 | * From now on, ignore @silent parameter. If we fail below this line, | |
2888 | * it will be due to a corrupt fs or a system error, so we report it. | |
2889 | */ | |
2890 | /* | |
2891 | * Open the system files with normal access functions and complete | |
2892 | * setting up the ntfs super block. | |
2893 | */ | |
2894 | if (!load_system_files(vol)) { | |
2895 | ntfs_error(sb, "Failed to load system files."); | |
2896 | goto unl_upcase_iput_tmp_ino_err_out_now; | |
2897 | } | |
ea29c695 AV |
2898 | |
2899 | /* We grab a reference, simulating an ntfs_iget(). */ | |
2900 | ihold(vol->root_ino); | |
2901 | if ((sb->s_root = d_make_root(vol->root_ino))) { | |
1da177e4 LT |
2902 | ntfs_debug("Exiting, status successful."); |
2903 | /* Release the default upcase if it has no users. */ | |
4e5e529a | 2904 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2905 | if (!--ntfs_nr_upcase_users && default_upcase) { |
2906 | ntfs_free(default_upcase); | |
2907 | default_upcase = NULL; | |
2908 | } | |
4e5e529a | 2909 | mutex_unlock(&ntfs_lock); |
1da177e4 | 2910 | sb->s_export_op = &ntfs_export_ops; |
59345374 | 2911 | lockdep_on(); |
1da177e4 LT |
2912 | return 0; |
2913 | } | |
2914 | ntfs_error(sb, "Failed to allocate root directory."); | |
2915 | /* Clean up after the successful load_system_files() call from above. */ | |
2916 | // TODO: Use ntfs_put_super() instead of repeating all this code... | |
2917 | // FIXME: Should mark the volume clean as the error is most likely | |
2918 | // -ENOMEM. | |
2919 | iput(vol->vol_ino); | |
2920 | vol->vol_ino = NULL; | |
2921 | /* NTFS 3.0+ specific clean up. */ | |
2922 | if (vol->major_ver >= 3) { | |
2923 | #ifdef NTFS_RW | |
3f2faef0 AA |
2924 | if (vol->usnjrnl_j_ino) { |
2925 | iput(vol->usnjrnl_j_ino); | |
2926 | vol->usnjrnl_j_ino = NULL; | |
2927 | } | |
2928 | if (vol->usnjrnl_max_ino) { | |
2929 | iput(vol->usnjrnl_max_ino); | |
2930 | vol->usnjrnl_max_ino = NULL; | |
2931 | } | |
2932 | if (vol->usnjrnl_ino) { | |
2933 | iput(vol->usnjrnl_ino); | |
2934 | vol->usnjrnl_ino = NULL; | |
2935 | } | |
1da177e4 LT |
2936 | if (vol->quota_q_ino) { |
2937 | iput(vol->quota_q_ino); | |
2938 | vol->quota_q_ino = NULL; | |
2939 | } | |
2940 | if (vol->quota_ino) { | |
2941 | iput(vol->quota_ino); | |
2942 | vol->quota_ino = NULL; | |
2943 | } | |
2944 | #endif /* NTFS_RW */ | |
2945 | if (vol->extend_ino) { | |
2946 | iput(vol->extend_ino); | |
2947 | vol->extend_ino = NULL; | |
2948 | } | |
2949 | if (vol->secure_ino) { | |
2950 | iput(vol->secure_ino); | |
2951 | vol->secure_ino = NULL; | |
2952 | } | |
2953 | } | |
2954 | iput(vol->root_ino); | |
2955 | vol->root_ino = NULL; | |
2956 | iput(vol->lcnbmp_ino); | |
2957 | vol->lcnbmp_ino = NULL; | |
2958 | iput(vol->mftbmp_ino); | |
2959 | vol->mftbmp_ino = NULL; | |
2960 | #ifdef NTFS_RW | |
2961 | if (vol->logfile_ino) { | |
2962 | iput(vol->logfile_ino); | |
2963 | vol->logfile_ino = NULL; | |
2964 | } | |
2965 | if (vol->mftmirr_ino) { | |
2966 | iput(vol->mftmirr_ino); | |
2967 | vol->mftmirr_ino = NULL; | |
2968 | } | |
2969 | #endif /* NTFS_RW */ | |
2970 | /* Throw away the table of attribute definitions. */ | |
2971 | vol->attrdef_size = 0; | |
2972 | if (vol->attrdef) { | |
2973 | ntfs_free(vol->attrdef); | |
2974 | vol->attrdef = NULL; | |
2975 | } | |
2976 | vol->upcase_len = 0; | |
4e5e529a | 2977 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2978 | if (vol->upcase == default_upcase) { |
2979 | ntfs_nr_upcase_users--; | |
2980 | vol->upcase = NULL; | |
2981 | } | |
4e5e529a | 2982 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2983 | if (vol->upcase) { |
2984 | ntfs_free(vol->upcase); | |
2985 | vol->upcase = NULL; | |
2986 | } | |
2987 | if (vol->nls_map) { | |
2988 | unload_nls(vol->nls_map); | |
2989 | vol->nls_map = NULL; | |
2990 | } | |
2991 | /* Error exit code path. */ | |
2992 | unl_upcase_iput_tmp_ino_err_out_now: | |
2993 | /* | |
2994 | * Decrease the number of upcase users and destroy the global default | |
2995 | * upcase table if necessary. | |
2996 | */ | |
4e5e529a | 2997 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2998 | if (!--ntfs_nr_upcase_users && default_upcase) { |
2999 | ntfs_free(default_upcase); | |
3000 | default_upcase = NULL; | |
3001 | } | |
3002 | if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users) | |
3003 | free_compression_buffers(); | |
4e5e529a | 3004 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
3005 | iput_tmp_ino_err_out_now: |
3006 | iput(tmp_ino); | |
3007 | if (vol->mft_ino && vol->mft_ino != tmp_ino) | |
3008 | iput(vol->mft_ino); | |
3009 | vol->mft_ino = NULL; | |
1da177e4 LT |
3010 | /* Errors at this stage are irrelevant. */ |
3011 | err_out_now: | |
1da177e4 LT |
3012 | sb->s_fs_info = NULL; |
3013 | kfree(vol); | |
3014 | ntfs_debug("Failed, returning -EINVAL."); | |
59345374 | 3015 | lockdep_on(); |
1da177e4 LT |
3016 | return -EINVAL; |
3017 | } | |
3018 | ||
3019 | /* | |
3020 | * This is a slab cache to optimize allocations and deallocations of Unicode | |
3021 | * strings of the maximum length allowed by NTFS, which is NTFS_MAX_NAME_LEN | |
3022 | * (255) Unicode characters + a terminating NULL Unicode character. | |
3023 | */ | |
64419d93 | 3024 | struct kmem_cache *ntfs_name_cache; |
1da177e4 | 3025 | |
7fafb8b6 | 3026 | /* Slab caches for efficient allocation/deallocation of inodes. */ |
64419d93 PE |
3027 | struct kmem_cache *ntfs_inode_cache; |
3028 | struct kmem_cache *ntfs_big_inode_cache; | |
1da177e4 LT |
3029 | |
3030 | /* Init once constructor for the inode slab cache. */ | |
51cc5068 | 3031 | static void ntfs_big_inode_init_once(void *foo) |
1da177e4 LT |
3032 | { |
3033 | ntfs_inode *ni = (ntfs_inode *)foo; | |
3034 | ||
a35afb83 | 3035 | inode_init_once(VFS_I(ni)); |
1da177e4 LT |
3036 | } |
3037 | ||
3038 | /* | |
3039 | * Slab caches to optimize allocations and deallocations of attribute search | |
3040 | * contexts and index contexts, respectively. | |
3041 | */ | |
64419d93 PE |
3042 | struct kmem_cache *ntfs_attr_ctx_cache; |
3043 | struct kmem_cache *ntfs_index_ctx_cache; | |
1da177e4 | 3044 | |
e750d1c7 | 3045 | /* Driver wide mutex. */ |
4e5e529a | 3046 | DEFINE_MUTEX(ntfs_lock); |
1da177e4 | 3047 | |
152a0836 AV |
3048 | static struct dentry *ntfs_mount(struct file_system_type *fs_type, |
3049 | int flags, const char *dev_name, void *data) | |
1da177e4 | 3050 | { |
152a0836 | 3051 | return mount_bdev(fs_type, flags, dev_name, data, ntfs_fill_super); |
1da177e4 LT |
3052 | } |
3053 | ||
3054 | static struct file_system_type ntfs_fs_type = { | |
3055 | .owner = THIS_MODULE, | |
3056 | .name = "ntfs", | |
152a0836 | 3057 | .mount = ntfs_mount, |
1da177e4 LT |
3058 | .kill_sb = kill_block_super, |
3059 | .fs_flags = FS_REQUIRES_DEV, | |
3060 | }; | |
7f78e035 | 3061 | MODULE_ALIAS_FS("ntfs"); |
1da177e4 LT |
3062 | |
3063 | /* Stable names for the slab caches. */ | |
3064 | static const char ntfs_index_ctx_cache_name[] = "ntfs_index_ctx_cache"; | |
3065 | static const char ntfs_attr_ctx_cache_name[] = "ntfs_attr_ctx_cache"; | |
3066 | static const char ntfs_name_cache_name[] = "ntfs_name_cache"; | |
3067 | static const char ntfs_inode_cache_name[] = "ntfs_inode_cache"; | |
3068 | static const char ntfs_big_inode_cache_name[] = "ntfs_big_inode_cache"; | |
3069 | ||
3070 | static int __init init_ntfs_fs(void) | |
3071 | { | |
3072 | int err = 0; | |
3073 | ||
3074 | /* This may be ugly but it results in pretty output so who cares. (-8 */ | |
87c1b497 | 3075 | pr_info("driver " NTFS_VERSION " [Flags: R/" |
1da177e4 LT |
3076 | #ifdef NTFS_RW |
3077 | "W" | |
3078 | #else | |
3079 | "O" | |
3080 | #endif | |
3081 | #ifdef DEBUG | |
3082 | " DEBUG" | |
3083 | #endif | |
3084 | #ifdef MODULE | |
3085 | " MODULE" | |
3086 | #endif | |
3087 | "].\n"); | |
3088 | ||
3089 | ntfs_debug("Debug messages are enabled."); | |
3090 | ||
3091 | ntfs_index_ctx_cache = kmem_cache_create(ntfs_index_ctx_cache_name, | |
3092 | sizeof(ntfs_index_context), 0 /* offset */, | |
20c2df83 | 3093 | SLAB_HWCACHE_ALIGN, NULL /* ctor */); |
1da177e4 | 3094 | if (!ntfs_index_ctx_cache) { |
87c1b497 | 3095 | pr_crit("Failed to create %s!\n", ntfs_index_ctx_cache_name); |
1da177e4 LT |
3096 | goto ictx_err_out; |
3097 | } | |
3098 | ntfs_attr_ctx_cache = kmem_cache_create(ntfs_attr_ctx_cache_name, | |
3099 | sizeof(ntfs_attr_search_ctx), 0 /* offset */, | |
20c2df83 | 3100 | SLAB_HWCACHE_ALIGN, NULL /* ctor */); |
1da177e4 | 3101 | if (!ntfs_attr_ctx_cache) { |
87c1b497 FF |
3102 | pr_crit("NTFS: Failed to create %s!\n", |
3103 | ntfs_attr_ctx_cache_name); | |
1da177e4 LT |
3104 | goto actx_err_out; |
3105 | } | |
3106 | ||
3107 | ntfs_name_cache = kmem_cache_create(ntfs_name_cache_name, | |
3108 | (NTFS_MAX_NAME_LEN+1) * sizeof(ntfschar), 0, | |
20c2df83 | 3109 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 | 3110 | if (!ntfs_name_cache) { |
87c1b497 | 3111 | pr_crit("Failed to create %s!\n", ntfs_name_cache_name); |
1da177e4 LT |
3112 | goto name_err_out; |
3113 | } | |
3114 | ||
3115 | ntfs_inode_cache = kmem_cache_create(ntfs_inode_cache_name, | |
3116 | sizeof(ntfs_inode), 0, | |
20c2df83 | 3117 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); |
1da177e4 | 3118 | if (!ntfs_inode_cache) { |
87c1b497 | 3119 | pr_crit("Failed to create %s!\n", ntfs_inode_cache_name); |
1da177e4 LT |
3120 | goto inode_err_out; |
3121 | } | |
3122 | ||
3123 | ntfs_big_inode_cache = kmem_cache_create(ntfs_big_inode_cache_name, | |
3124 | sizeof(big_ntfs_inode), 0, | |
5d097056 VD |
3125 | SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
3126 | SLAB_ACCOUNT, ntfs_big_inode_init_once); | |
1da177e4 | 3127 | if (!ntfs_big_inode_cache) { |
87c1b497 | 3128 | pr_crit("Failed to create %s!\n", ntfs_big_inode_cache_name); |
1da177e4 LT |
3129 | goto big_inode_err_out; |
3130 | } | |
3131 | ||
3132 | /* Register the ntfs sysctls. */ | |
3133 | err = ntfs_sysctl(1); | |
3134 | if (err) { | |
87c1b497 | 3135 | pr_crit("Failed to register NTFS sysctls!\n"); |
1da177e4 LT |
3136 | goto sysctl_err_out; |
3137 | } | |
3138 | ||
3139 | err = register_filesystem(&ntfs_fs_type); | |
3140 | if (!err) { | |
3141 | ntfs_debug("NTFS driver registered successfully."); | |
3142 | return 0; /* Success! */ | |
3143 | } | |
87c1b497 | 3144 | pr_crit("Failed to register NTFS filesystem driver!\n"); |
1da177e4 | 3145 | |
f4c5499d AV |
3146 | /* Unregister the ntfs sysctls. */ |
3147 | ntfs_sysctl(0); | |
1da177e4 LT |
3148 | sysctl_err_out: |
3149 | kmem_cache_destroy(ntfs_big_inode_cache); | |
3150 | big_inode_err_out: | |
3151 | kmem_cache_destroy(ntfs_inode_cache); | |
3152 | inode_err_out: | |
3153 | kmem_cache_destroy(ntfs_name_cache); | |
3154 | name_err_out: | |
3155 | kmem_cache_destroy(ntfs_attr_ctx_cache); | |
3156 | actx_err_out: | |
3157 | kmem_cache_destroy(ntfs_index_ctx_cache); | |
3158 | ictx_err_out: | |
3159 | if (!err) { | |
87c1b497 | 3160 | pr_crit("Aborting NTFS filesystem driver registration...\n"); |
1da177e4 LT |
3161 | err = -ENOMEM; |
3162 | } | |
3163 | return err; | |
3164 | } | |
3165 | ||
3166 | static void __exit exit_ntfs_fs(void) | |
3167 | { | |
1da177e4 LT |
3168 | ntfs_debug("Unregistering NTFS driver."); |
3169 | ||
3170 | unregister_filesystem(&ntfs_fs_type); | |
8c0a8537 KS |
3171 | |
3172 | /* | |
3173 | * Make sure all delayed rcu free inodes are flushed before we | |
3174 | * destroy cache. | |
3175 | */ | |
3176 | rcu_barrier(); | |
1a1d92c1 AD |
3177 | kmem_cache_destroy(ntfs_big_inode_cache); |
3178 | kmem_cache_destroy(ntfs_inode_cache); | |
3179 | kmem_cache_destroy(ntfs_name_cache); | |
3180 | kmem_cache_destroy(ntfs_attr_ctx_cache); | |
3181 | kmem_cache_destroy(ntfs_index_ctx_cache); | |
1da177e4 LT |
3182 | /* Unregister the ntfs sysctls. */ |
3183 | ntfs_sysctl(0); | |
3184 | } | |
3185 | ||
2818ef50 | 3186 | MODULE_AUTHOR("Anton Altaparmakov <anton@tuxera.com>"); |
5272d036 | 3187 | MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc."); |
1da177e4 LT |
3188 | MODULE_VERSION(NTFS_VERSION); |
3189 | MODULE_LICENSE("GPL"); | |
3190 | #ifdef DEBUG | |
69116f27 | 3191 | module_param(debug_msgs, bint, 0); |
1da177e4 LT |
3192 | MODULE_PARM_DESC(debug_msgs, "Enable debug messages."); |
3193 | #endif | |
3194 | ||
3195 | module_init(init_ntfs_fs) | |
3196 | module_exit(exit_ntfs_fs) |