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82cae269 KK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * | |
4 | * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. | |
5 | * | |
6 | * | |
7 | * terminology | |
8 | * | |
9 | * cluster - allocation unit - 512,1K,2K,4K,...,2M | |
e8b8e97f KA |
10 | * vcn - virtual cluster number - Offset inside the file in clusters. |
11 | * vbo - virtual byte offset - Offset inside the file in bytes. | |
12 | * lcn - logical cluster number - 0 based cluster in clusters heap. | |
13 | * lbo - logical byte offset - Absolute position inside volume. | |
14 | * run - maps VCN to LCN - Stored in attributes in packed form. | |
15 | * attr - attribute segment - std/name/data etc records inside MFT. | |
16 | * mi - MFT inode - One MFT record(usually 1024 bytes or 4K), consists of attributes. | |
17 | * ni - NTFS inode - Extends linux inode. consists of one or more mft inodes. | |
18 | * index - unit inside directory - 2K, 4K, <=page size, does not depend on cluster size. | |
82cae269 KK |
19 | * |
20 | * WSL - Windows Subsystem for Linux | |
21 | * https://docs.microsoft.com/en-us/windows/wsl/file-permissions | |
22 | * It stores uid/gid/mode/dev in xattr | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/backing-dev.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/buffer_head.h> | |
29 | #include <linux/exportfs.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/iversion.h> | |
528c9b3d | 32 | #include <linux/log2.h> |
82cae269 KK |
33 | #include <linux/module.h> |
34 | #include <linux/nls.h> | |
35 | #include <linux/parser.h> | |
36 | #include <linux/seq_file.h> | |
37 | #include <linux/statfs.h> | |
38 | ||
39 | #include "debug.h" | |
40 | #include "ntfs.h" | |
41 | #include "ntfs_fs.h" | |
42 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
43 | #include "lib/lib.h" | |
44 | #endif | |
45 | ||
46 | #ifdef CONFIG_PRINTK | |
47 | /* | |
e8b8e97f KA |
48 | * ntfs_printk - Trace warnings/notices/errors. |
49 | * | |
82cae269 KK |
50 | * Thanks Joe Perches <joe@perches.com> for implementation |
51 | */ | |
52 | void ntfs_printk(const struct super_block *sb, const char *fmt, ...) | |
53 | { | |
54 | struct va_format vaf; | |
55 | va_list args; | |
56 | int level; | |
57 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
58 | ||
e8b8e97f | 59 | /* Should we use different ratelimits for warnings/notices/errors? */ |
82cae269 KK |
60 | if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) |
61 | return; | |
62 | ||
63 | va_start(args, fmt); | |
64 | ||
65 | level = printk_get_level(fmt); | |
66 | vaf.fmt = printk_skip_level(fmt); | |
67 | vaf.va = &args; | |
68 | printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); | |
69 | ||
70 | va_end(args); | |
71 | } | |
72 | ||
73 | static char s_name_buf[512]; | |
e8b8e97f | 74 | static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'. |
82cae269 | 75 | |
e8b8e97f KA |
76 | /* |
77 | * ntfs_inode_printk | |
78 | * | |
79 | * Print warnings/notices/errors about inode using name or inode number. | |
80 | */ | |
82cae269 KK |
81 | void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) |
82 | { | |
83 | struct super_block *sb = inode->i_sb; | |
84 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
85 | char *name; | |
86 | va_list args; | |
87 | struct va_format vaf; | |
88 | int level; | |
89 | ||
90 | if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) | |
91 | return; | |
92 | ||
e8b8e97f | 93 | /* Use static allocated buffer, if possible. */ |
82cae269 KK |
94 | name = atomic_dec_and_test(&s_name_buf_cnt) |
95 | ? s_name_buf | |
96 | : kmalloc(sizeof(s_name_buf), GFP_NOFS); | |
97 | ||
98 | if (name) { | |
99 | struct dentry *de = d_find_alias(inode); | |
100 | const u32 name_len = ARRAY_SIZE(s_name_buf) - 1; | |
101 | ||
102 | if (de) { | |
103 | spin_lock(&de->d_lock); | |
104 | snprintf(name, name_len, " \"%s\"", de->d_name.name); | |
105 | spin_unlock(&de->d_lock); | |
e8b8e97f | 106 | name[name_len] = 0; /* To be sure. */ |
82cae269 KK |
107 | } else { |
108 | name[0] = 0; | |
109 | } | |
e8b8e97f | 110 | dput(de); /* Cocci warns if placed in branch "if (de)" */ |
82cae269 KK |
111 | } |
112 | ||
113 | va_start(args, fmt); | |
114 | ||
115 | level = printk_get_level(fmt); | |
116 | vaf.fmt = printk_skip_level(fmt); | |
117 | vaf.va = &args; | |
118 | ||
119 | printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level, | |
120 | sb->s_id, inode->i_ino, name ? name : "", &vaf); | |
121 | ||
122 | va_end(args); | |
123 | ||
124 | atomic_inc(&s_name_buf_cnt); | |
125 | if (name != s_name_buf) | |
126 | kfree(name); | |
127 | } | |
128 | #endif | |
129 | ||
130 | /* | |
131 | * Shared memory struct. | |
132 | * | |
e8b8e97f KA |
133 | * On-disk ntfs's upcase table is created by ntfs formatter. |
134 | * 'upcase' table is 128K bytes of memory. | |
135 | * We should read it into memory when mounting. | |
136 | * Several ntfs volumes likely use the same 'upcase' table. | |
137 | * It is good idea to share in-memory 'upcase' table between different volumes. | |
138 | * Unfortunately winxp/vista/win7 use different upcase tables. | |
82cae269 KK |
139 | */ |
140 | static DEFINE_SPINLOCK(s_shared_lock); | |
141 | ||
142 | static struct { | |
143 | void *ptr; | |
144 | u32 len; | |
145 | int cnt; | |
146 | } s_shared[8]; | |
147 | ||
148 | /* | |
149 | * ntfs_set_shared | |
150 | * | |
e8b8e97f KA |
151 | * Return: |
152 | * * @ptr - If pointer was saved in shared memory. | |
153 | * * NULL - If pointer was not shared. | |
82cae269 KK |
154 | */ |
155 | void *ntfs_set_shared(void *ptr, u32 bytes) | |
156 | { | |
157 | void *ret = NULL; | |
158 | int i, j = -1; | |
159 | ||
160 | spin_lock(&s_shared_lock); | |
161 | for (i = 0; i < ARRAY_SIZE(s_shared); i++) { | |
162 | if (!s_shared[i].cnt) { | |
163 | j = i; | |
164 | } else if (bytes == s_shared[i].len && | |
165 | !memcmp(s_shared[i].ptr, ptr, bytes)) { | |
166 | s_shared[i].cnt += 1; | |
167 | ret = s_shared[i].ptr; | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
172 | if (!ret && j != -1) { | |
173 | s_shared[j].ptr = ptr; | |
174 | s_shared[j].len = bytes; | |
175 | s_shared[j].cnt = 1; | |
176 | ret = ptr; | |
177 | } | |
178 | spin_unlock(&s_shared_lock); | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | /* | |
184 | * ntfs_put_shared | |
185 | * | |
e8b8e97f KA |
186 | * Return: |
187 | * * @ptr - If pointer is not shared anymore. | |
188 | * * NULL - If pointer is still shared. | |
82cae269 KK |
189 | */ |
190 | void *ntfs_put_shared(void *ptr) | |
191 | { | |
192 | void *ret = ptr; | |
193 | int i; | |
194 | ||
195 | spin_lock(&s_shared_lock); | |
196 | for (i = 0; i < ARRAY_SIZE(s_shared); i++) { | |
197 | if (s_shared[i].cnt && s_shared[i].ptr == ptr) { | |
198 | if (--s_shared[i].cnt) | |
199 | ret = NULL; | |
200 | break; | |
201 | } | |
202 | } | |
203 | spin_unlock(&s_shared_lock); | |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
208 | static inline void clear_mount_options(struct ntfs_mount_options *options) | |
209 | { | |
210 | unload_nls(options->nls); | |
211 | } | |
212 | ||
213 | enum Opt { | |
214 | Opt_uid, | |
215 | Opt_gid, | |
216 | Opt_umask, | |
217 | Opt_dmask, | |
218 | Opt_fmask, | |
219 | Opt_immutable, | |
220 | Opt_discard, | |
221 | Opt_force, | |
222 | Opt_sparse, | |
223 | Opt_nohidden, | |
224 | Opt_showmeta, | |
225 | Opt_acl, | |
226 | Opt_noatime, | |
227 | Opt_nls, | |
228 | Opt_prealloc, | |
229 | Opt_no_acs_rules, | |
230 | Opt_err, | |
231 | }; | |
232 | ||
233 | static const match_table_t ntfs_tokens = { | |
234 | { Opt_uid, "uid=%u" }, | |
235 | { Opt_gid, "gid=%u" }, | |
236 | { Opt_umask, "umask=%o" }, | |
237 | { Opt_dmask, "dmask=%o" }, | |
238 | { Opt_fmask, "fmask=%o" }, | |
239 | { Opt_immutable, "sys_immutable" }, | |
240 | { Opt_discard, "discard" }, | |
241 | { Opt_force, "force" }, | |
242 | { Opt_sparse, "sparse" }, | |
243 | { Opt_nohidden, "nohidden" }, | |
244 | { Opt_acl, "acl" }, | |
245 | { Opt_noatime, "noatime" }, | |
246 | { Opt_showmeta, "showmeta" }, | |
247 | { Opt_nls, "nls=%s" }, | |
248 | { Opt_prealloc, "prealloc" }, | |
249 | { Opt_no_acs_rules, "no_acs_rules" }, | |
250 | { Opt_err, NULL }, | |
251 | }; | |
252 | ||
253 | static noinline int ntfs_parse_options(struct super_block *sb, char *options, | |
254 | int silent, | |
255 | struct ntfs_mount_options *opts) | |
256 | { | |
257 | char *p; | |
258 | substring_t args[MAX_OPT_ARGS]; | |
259 | int option; | |
260 | char nls_name[30]; | |
261 | struct nls_table *nls; | |
262 | ||
263 | opts->fs_uid = current_uid(); | |
264 | opts->fs_gid = current_gid(); | |
265 | opts->fs_fmask_inv = opts->fs_dmask_inv = ~current_umask(); | |
266 | nls_name[0] = 0; | |
267 | ||
268 | if (!options) | |
269 | goto out; | |
270 | ||
271 | while ((p = strsep(&options, ","))) { | |
272 | int token; | |
273 | ||
274 | if (!*p) | |
275 | continue; | |
276 | ||
277 | token = match_token(p, ntfs_tokens, args); | |
278 | switch (token) { | |
279 | case Opt_immutable: | |
280 | opts->sys_immutable = 1; | |
281 | break; | |
282 | case Opt_uid: | |
283 | if (match_int(&args[0], &option)) | |
284 | return -EINVAL; | |
285 | opts->fs_uid = make_kuid(current_user_ns(), option); | |
286 | if (!uid_valid(opts->fs_uid)) | |
287 | return -EINVAL; | |
288 | opts->uid = 1; | |
289 | break; | |
290 | case Opt_gid: | |
291 | if (match_int(&args[0], &option)) | |
292 | return -EINVAL; | |
293 | opts->fs_gid = make_kgid(current_user_ns(), option); | |
294 | if (!gid_valid(opts->fs_gid)) | |
295 | return -EINVAL; | |
296 | opts->gid = 1; | |
297 | break; | |
298 | case Opt_umask: | |
299 | if (match_octal(&args[0], &option)) | |
300 | return -EINVAL; | |
301 | opts->fs_fmask_inv = opts->fs_dmask_inv = ~option; | |
302 | opts->fmask = opts->dmask = 1; | |
303 | break; | |
304 | case Opt_dmask: | |
305 | if (match_octal(&args[0], &option)) | |
306 | return -EINVAL; | |
307 | opts->fs_dmask_inv = ~option; | |
308 | opts->dmask = 1; | |
309 | break; | |
310 | case Opt_fmask: | |
311 | if (match_octal(&args[0], &option)) | |
312 | return -EINVAL; | |
313 | opts->fs_fmask_inv = ~option; | |
314 | opts->fmask = 1; | |
315 | break; | |
316 | case Opt_discard: | |
317 | opts->discard = 1; | |
318 | break; | |
319 | case Opt_force: | |
320 | opts->force = 1; | |
321 | break; | |
322 | case Opt_sparse: | |
323 | opts->sparse = 1; | |
324 | break; | |
325 | case Opt_nohidden: | |
326 | opts->nohidden = 1; | |
327 | break; | |
328 | case Opt_acl: | |
329 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL | |
330 | sb->s_flags |= SB_POSIXACL; | |
331 | break; | |
332 | #else | |
333 | ntfs_err(sb, "support for ACL not compiled in!"); | |
334 | return -EINVAL; | |
335 | #endif | |
336 | case Opt_noatime: | |
337 | sb->s_flags |= SB_NOATIME; | |
338 | break; | |
339 | case Opt_showmeta: | |
340 | opts->showmeta = 1; | |
341 | break; | |
342 | case Opt_nls: | |
343 | match_strlcpy(nls_name, &args[0], sizeof(nls_name)); | |
344 | break; | |
345 | case Opt_prealloc: | |
346 | opts->prealloc = 1; | |
347 | break; | |
348 | case Opt_no_acs_rules: | |
349 | opts->no_acs_rules = 1; | |
350 | break; | |
351 | default: | |
352 | if (!silent) | |
353 | ntfs_err( | |
354 | sb, | |
355 | "Unrecognized mount option \"%s\" or missing value", | |
356 | p); | |
357 | //return -EINVAL; | |
358 | } | |
359 | } | |
360 | ||
361 | out: | |
362 | if (!strcmp(nls_name[0] ? nls_name : CONFIG_NLS_DEFAULT, "utf8")) { | |
e8b8e97f KA |
363 | /* |
364 | * For UTF-8 use utf16s_to_utf8s()/utf8s_to_utf16s() | |
365 | * instead of NLS. | |
366 | */ | |
82cae269 KK |
367 | nls = NULL; |
368 | } else if (nls_name[0]) { | |
369 | nls = load_nls(nls_name); | |
370 | if (!nls) { | |
371 | ntfs_err(sb, "failed to load \"%s\"", nls_name); | |
372 | return -EINVAL; | |
373 | } | |
374 | } else { | |
375 | nls = load_nls_default(); | |
376 | if (!nls) { | |
377 | ntfs_err(sb, "failed to load default nls"); | |
378 | return -EINVAL; | |
379 | } | |
380 | } | |
381 | opts->nls = nls; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | static int ntfs_remount(struct super_block *sb, int *flags, char *data) | |
387 | { | |
388 | int err, ro_rw; | |
389 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
390 | struct ntfs_mount_options old_opts; | |
391 | char *orig_data = kstrdup(data, GFP_KERNEL); | |
392 | ||
393 | if (data && !orig_data) | |
394 | return -ENOMEM; | |
395 | ||
e8b8e97f | 396 | /* Store original options. */ |
82cae269 KK |
397 | memcpy(&old_opts, &sbi->options, sizeof(old_opts)); |
398 | clear_mount_options(&sbi->options); | |
399 | memset(&sbi->options, 0, sizeof(sbi->options)); | |
400 | ||
401 | err = ntfs_parse_options(sb, data, 0, &sbi->options); | |
402 | if (err) | |
403 | goto restore_opts; | |
404 | ||
405 | ro_rw = sb_rdonly(sb) && !(*flags & SB_RDONLY); | |
406 | if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { | |
407 | ntfs_warn( | |
408 | sb, | |
409 | "Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); | |
410 | err = -EINVAL; | |
411 | goto restore_opts; | |
412 | } | |
413 | ||
414 | sync_filesystem(sb); | |
415 | ||
416 | if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && | |
417 | !sbi->options.force) { | |
418 | ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); | |
419 | err = -EINVAL; | |
420 | goto restore_opts; | |
421 | } | |
422 | ||
423 | clear_mount_options(&old_opts); | |
424 | ||
425 | *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME) | | |
426 | SB_NODIRATIME | SB_NOATIME; | |
427 | ntfs_info(sb, "re-mounted. Opts: %s", orig_data); | |
428 | err = 0; | |
429 | goto out; | |
430 | ||
431 | restore_opts: | |
432 | clear_mount_options(&sbi->options); | |
433 | memcpy(&sbi->options, &old_opts, sizeof(old_opts)); | |
434 | ||
435 | out: | |
436 | kfree(orig_data); | |
437 | return err; | |
438 | } | |
439 | ||
440 | static struct kmem_cache *ntfs_inode_cachep; | |
441 | ||
442 | static struct inode *ntfs_alloc_inode(struct super_block *sb) | |
443 | { | |
444 | struct ntfs_inode *ni = kmem_cache_alloc(ntfs_inode_cachep, GFP_NOFS); | |
445 | ||
446 | if (!ni) | |
447 | return NULL; | |
448 | ||
449 | memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode)); | |
450 | ||
451 | mutex_init(&ni->ni_lock); | |
452 | ||
453 | return &ni->vfs_inode; | |
454 | } | |
455 | ||
456 | static void ntfs_i_callback(struct rcu_head *head) | |
457 | { | |
458 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
459 | struct ntfs_inode *ni = ntfs_i(inode); | |
460 | ||
461 | mutex_destroy(&ni->ni_lock); | |
462 | ||
463 | kmem_cache_free(ntfs_inode_cachep, ni); | |
464 | } | |
465 | ||
466 | static void ntfs_destroy_inode(struct inode *inode) | |
467 | { | |
468 | call_rcu(&inode->i_rcu, ntfs_i_callback); | |
469 | } | |
470 | ||
471 | static void init_once(void *foo) | |
472 | { | |
473 | struct ntfs_inode *ni = foo; | |
474 | ||
475 | inode_init_once(&ni->vfs_inode); | |
476 | } | |
477 | ||
e8b8e97f KA |
478 | /* |
479 | * put_ntfs - Noinline to reduce binary size. | |
480 | */ | |
82cae269 KK |
481 | static noinline void put_ntfs(struct ntfs_sb_info *sbi) |
482 | { | |
195c52bd KA |
483 | kfree(sbi->new_rec); |
484 | kvfree(ntfs_put_shared(sbi->upcase)); | |
485 | kfree(sbi->def_table); | |
82cae269 KK |
486 | |
487 | wnd_close(&sbi->mft.bitmap); | |
488 | wnd_close(&sbi->used.bitmap); | |
489 | ||
490 | if (sbi->mft.ni) | |
491 | iput(&sbi->mft.ni->vfs_inode); | |
492 | ||
493 | if (sbi->security.ni) | |
494 | iput(&sbi->security.ni->vfs_inode); | |
495 | ||
496 | if (sbi->reparse.ni) | |
497 | iput(&sbi->reparse.ni->vfs_inode); | |
498 | ||
499 | if (sbi->objid.ni) | |
500 | iput(&sbi->objid.ni->vfs_inode); | |
501 | ||
502 | if (sbi->volume.ni) | |
503 | iput(&sbi->volume.ni->vfs_inode); | |
504 | ||
505 | ntfs_update_mftmirr(sbi, 0); | |
506 | ||
507 | indx_clear(&sbi->security.index_sii); | |
508 | indx_clear(&sbi->security.index_sdh); | |
509 | indx_clear(&sbi->reparse.index_r); | |
510 | indx_clear(&sbi->objid.index_o); | |
195c52bd | 511 | kfree(sbi->compress.lznt); |
82cae269 KK |
512 | #ifdef CONFIG_NTFS3_LZX_XPRESS |
513 | xpress_free_decompressor(sbi->compress.xpress); | |
514 | lzx_free_decompressor(sbi->compress.lzx); | |
515 | #endif | |
516 | clear_mount_options(&sbi->options); | |
517 | ||
195c52bd | 518 | kfree(sbi); |
82cae269 KK |
519 | } |
520 | ||
521 | static void ntfs_put_super(struct super_block *sb) | |
522 | { | |
523 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
524 | ||
e8b8e97f | 525 | /* Mark rw ntfs as clear, if possible. */ |
82cae269 KK |
526 | ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); |
527 | ||
528 | put_ntfs(sbi); | |
529 | ||
530 | sync_blockdev(sb->s_bdev); | |
531 | } | |
532 | ||
533 | static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
534 | { | |
535 | struct super_block *sb = dentry->d_sb; | |
536 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
537 | struct wnd_bitmap *wnd = &sbi->used.bitmap; | |
538 | ||
539 | buf->f_type = sb->s_magic; | |
540 | buf->f_bsize = sbi->cluster_size; | |
541 | buf->f_blocks = wnd->nbits; | |
542 | ||
543 | buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd); | |
544 | buf->f_fsid.val[0] = sbi->volume.ser_num; | |
545 | buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32); | |
546 | buf->f_namelen = NTFS_NAME_LEN; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | static int ntfs_show_options(struct seq_file *m, struct dentry *root) | |
552 | { | |
553 | struct super_block *sb = root->d_sb; | |
554 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
555 | struct ntfs_mount_options *opts = &sbi->options; | |
556 | struct user_namespace *user_ns = seq_user_ns(m); | |
557 | ||
558 | if (opts->uid) | |
559 | seq_printf(m, ",uid=%u", | |
560 | from_kuid_munged(user_ns, opts->fs_uid)); | |
561 | if (opts->gid) | |
562 | seq_printf(m, ",gid=%u", | |
563 | from_kgid_munged(user_ns, opts->fs_gid)); | |
564 | if (opts->fmask) | |
565 | seq_printf(m, ",fmask=%04o", ~opts->fs_fmask_inv); | |
566 | if (opts->dmask) | |
567 | seq_printf(m, ",dmask=%04o", ~opts->fs_dmask_inv); | |
568 | if (opts->nls) | |
569 | seq_printf(m, ",nls=%s", opts->nls->charset); | |
570 | else | |
571 | seq_puts(m, ",nls=utf8"); | |
572 | if (opts->sys_immutable) | |
573 | seq_puts(m, ",sys_immutable"); | |
574 | if (opts->discard) | |
575 | seq_puts(m, ",discard"); | |
576 | if (opts->sparse) | |
577 | seq_puts(m, ",sparse"); | |
578 | if (opts->showmeta) | |
579 | seq_puts(m, ",showmeta"); | |
580 | if (opts->nohidden) | |
581 | seq_puts(m, ",nohidden"); | |
582 | if (opts->force) | |
583 | seq_puts(m, ",force"); | |
584 | if (opts->no_acs_rules) | |
585 | seq_puts(m, ",no_acs_rules"); | |
586 | if (opts->prealloc) | |
587 | seq_puts(m, ",prealloc"); | |
588 | if (sb->s_flags & SB_POSIXACL) | |
589 | seq_puts(m, ",acl"); | |
590 | if (sb->s_flags & SB_NOATIME) | |
591 | seq_puts(m, ",noatime"); | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
e8b8e97f KA |
596 | /* |
597 | * ntfs_sync_fs - super_operations::sync_fs | |
598 | */ | |
82cae269 KK |
599 | static int ntfs_sync_fs(struct super_block *sb, int wait) |
600 | { | |
601 | int err = 0, err2; | |
602 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
603 | struct ntfs_inode *ni; | |
604 | struct inode *inode; | |
605 | ||
606 | ni = sbi->security.ni; | |
607 | if (ni) { | |
608 | inode = &ni->vfs_inode; | |
609 | err2 = _ni_write_inode(inode, wait); | |
610 | if (err2 && !err) | |
611 | err = err2; | |
612 | } | |
613 | ||
614 | ni = sbi->objid.ni; | |
615 | if (ni) { | |
616 | inode = &ni->vfs_inode; | |
617 | err2 = _ni_write_inode(inode, wait); | |
618 | if (err2 && !err) | |
619 | err = err2; | |
620 | } | |
621 | ||
622 | ni = sbi->reparse.ni; | |
623 | if (ni) { | |
624 | inode = &ni->vfs_inode; | |
625 | err2 = _ni_write_inode(inode, wait); | |
626 | if (err2 && !err) | |
627 | err = err2; | |
628 | } | |
629 | ||
630 | if (!err) | |
631 | ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); | |
632 | ||
633 | ntfs_update_mftmirr(sbi, wait); | |
634 | ||
635 | return err; | |
636 | } | |
637 | ||
638 | static const struct super_operations ntfs_sops = { | |
639 | .alloc_inode = ntfs_alloc_inode, | |
640 | .destroy_inode = ntfs_destroy_inode, | |
641 | .evict_inode = ntfs_evict_inode, | |
642 | .put_super = ntfs_put_super, | |
643 | .statfs = ntfs_statfs, | |
644 | .show_options = ntfs_show_options, | |
645 | .sync_fs = ntfs_sync_fs, | |
646 | .remount_fs = ntfs_remount, | |
647 | .write_inode = ntfs3_write_inode, | |
648 | }; | |
649 | ||
650 | static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino, | |
651 | u32 generation) | |
652 | { | |
653 | struct MFT_REF ref; | |
654 | struct inode *inode; | |
655 | ||
656 | ref.low = cpu_to_le32(ino); | |
657 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
658 | ref.high = cpu_to_le16(ino >> 32); | |
659 | #else | |
660 | ref.high = 0; | |
661 | #endif | |
662 | ref.seq = cpu_to_le16(generation); | |
663 | ||
664 | inode = ntfs_iget5(sb, &ref, NULL); | |
665 | if (!IS_ERR(inode) && is_bad_inode(inode)) { | |
666 | iput(inode); | |
667 | inode = ERR_PTR(-ESTALE); | |
668 | } | |
669 | ||
670 | return inode; | |
671 | } | |
672 | ||
673 | static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
674 | int fh_len, int fh_type) | |
675 | { | |
676 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
677 | ntfs_export_get_inode); | |
678 | } | |
679 | ||
680 | static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
681 | int fh_len, int fh_type) | |
682 | { | |
683 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
684 | ntfs_export_get_inode); | |
685 | } | |
686 | ||
687 | /* TODO: == ntfs_sync_inode */ | |
688 | static int ntfs_nfs_commit_metadata(struct inode *inode) | |
689 | { | |
690 | return _ni_write_inode(inode, 1); | |
691 | } | |
692 | ||
693 | static const struct export_operations ntfs_export_ops = { | |
694 | .fh_to_dentry = ntfs_fh_to_dentry, | |
695 | .fh_to_parent = ntfs_fh_to_parent, | |
696 | .get_parent = ntfs3_get_parent, | |
697 | .commit_metadata = ntfs_nfs_commit_metadata, | |
698 | }; | |
699 | ||
e8b8e97f KA |
700 | /* |
701 | * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb". | |
702 | */ | |
82cae269 KK |
703 | static u32 format_size_gb(const u64 bytes, u32 *mb) |
704 | { | |
e8b8e97f | 705 | /* Do simple right 30 bit shift of 64 bit value. */ |
82cae269 KK |
706 | u64 kbytes = bytes >> 10; |
707 | u32 kbytes32 = kbytes; | |
708 | ||
709 | *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20; | |
710 | if (*mb >= 100) | |
711 | *mb = 99; | |
712 | ||
713 | return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12); | |
714 | } | |
715 | ||
716 | static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot) | |
717 | { | |
718 | return boot->sectors_per_clusters <= 0x80 | |
719 | ? boot->sectors_per_clusters | |
720 | : (1u << (0 - boot->sectors_per_clusters)); | |
721 | } | |
722 | ||
e8b8e97f KA |
723 | /* |
724 | * ntfs_init_from_boot - Init internal info from on-disk boot sector. | |
725 | */ | |
82cae269 KK |
726 | static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, |
727 | u64 dev_size) | |
728 | { | |
729 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
730 | int err; | |
731 | u32 mb, gb, boot_sector_size, sct_per_clst, record_size; | |
732 | u64 sectors, clusters, fs_size, mlcn, mlcn2; | |
733 | struct NTFS_BOOT *boot; | |
734 | struct buffer_head *bh; | |
735 | struct MFT_REC *rec; | |
736 | u16 fn, ao; | |
737 | ||
738 | sbi->volume.blocks = dev_size >> PAGE_SHIFT; | |
739 | ||
740 | bh = ntfs_bread(sb, 0); | |
741 | if (!bh) | |
742 | return -EIO; | |
743 | ||
744 | err = -EINVAL; | |
745 | boot = (struct NTFS_BOOT *)bh->b_data; | |
746 | ||
747 | if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) | |
748 | goto out; | |
749 | ||
750 | /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/ | |
751 | /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1]) | |
752 | * goto out; | |
753 | */ | |
754 | ||
755 | boot_sector_size = (u32)boot->bytes_per_sector[1] << 8; | |
756 | if (boot->bytes_per_sector[0] || boot_sector_size < SECTOR_SIZE || | |
528c9b3d | 757 | !is_power_of_2(boot_sector_size)) { |
82cae269 KK |
758 | goto out; |
759 | } | |
760 | ||
761 | /* cluster size: 512, 1K, 2K, 4K, ... 2M */ | |
762 | sct_per_clst = true_sectors_per_clst(boot); | |
528c9b3d | 763 | if (!is_power_of_2(sct_per_clst)) |
82cae269 KK |
764 | goto out; |
765 | ||
766 | mlcn = le64_to_cpu(boot->mft_clst); | |
767 | mlcn2 = le64_to_cpu(boot->mft2_clst); | |
768 | sectors = le64_to_cpu(boot->sectors_per_volume); | |
769 | ||
770 | if (mlcn * sct_per_clst >= sectors) | |
771 | goto out; | |
772 | ||
773 | if (mlcn2 * sct_per_clst >= sectors) | |
774 | goto out; | |
775 | ||
e8b8e97f | 776 | /* Check MFT record size. */ |
82cae269 KK |
777 | if ((boot->record_size < 0 && |
778 | SECTOR_SIZE > (2U << (-boot->record_size))) || | |
528c9b3d | 779 | (boot->record_size >= 0 && !is_power_of_2(boot->record_size))) { |
82cae269 KK |
780 | goto out; |
781 | } | |
782 | ||
e8b8e97f | 783 | /* Check index record size. */ |
82cae269 KK |
784 | if ((boot->index_size < 0 && |
785 | SECTOR_SIZE > (2U << (-boot->index_size))) || | |
528c9b3d | 786 | (boot->index_size >= 0 && !is_power_of_2(boot->index_size))) { |
82cae269 KK |
787 | goto out; |
788 | } | |
789 | ||
790 | sbi->sector_size = boot_sector_size; | |
791 | sbi->sector_bits = blksize_bits(boot_sector_size); | |
792 | fs_size = (sectors + 1) << sbi->sector_bits; | |
793 | ||
794 | gb = format_size_gb(fs_size, &mb); | |
795 | ||
796 | /* | |
e8b8e97f KA |
797 | * - Volume formatted and mounted with the same sector size. |
798 | * - Volume formatted 4K and mounted as 512. | |
799 | * - Volume formatted 512 and mounted as 4K. | |
82cae269 KK |
800 | */ |
801 | if (sbi->sector_size != sector_size) { | |
802 | ntfs_warn(sb, | |
803 | "Different NTFS' sector size and media sector size"); | |
804 | dev_size += sector_size - 1; | |
805 | } | |
806 | ||
807 | sbi->cluster_size = boot_sector_size * sct_per_clst; | |
808 | sbi->cluster_bits = blksize_bits(sbi->cluster_size); | |
809 | ||
810 | sbi->mft.lbo = mlcn << sbi->cluster_bits; | |
811 | sbi->mft.lbo2 = mlcn2 << sbi->cluster_bits; | |
812 | ||
813 | if (sbi->cluster_size < sbi->sector_size) | |
814 | goto out; | |
815 | ||
816 | sbi->cluster_mask = sbi->cluster_size - 1; | |
817 | sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; | |
818 | sbi->record_size = record_size = boot->record_size < 0 | |
819 | ? 1 << (-boot->record_size) | |
820 | : (u32)boot->record_size | |
821 | << sbi->cluster_bits; | |
822 | ||
823 | if (record_size > MAXIMUM_BYTES_PER_MFT) | |
824 | goto out; | |
825 | ||
826 | sbi->record_bits = blksize_bits(record_size); | |
827 | sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes | |
828 | ||
829 | sbi->max_bytes_per_attr = | |
fa3cacf5 KA |
830 | record_size - ALIGN(MFTRECORD_FIXUP_OFFSET_1, 8) - |
831 | ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) - | |
832 | ALIGN(sizeof(enum ATTR_TYPE), 8); | |
82cae269 KK |
833 | |
834 | sbi->index_size = boot->index_size < 0 | |
835 | ? 1u << (-boot->index_size) | |
836 | : (u32)boot->index_size << sbi->cluster_bits; | |
837 | ||
838 | sbi->volume.ser_num = le64_to_cpu(boot->serial_num); | |
839 | sbi->volume.size = sectors << sbi->sector_bits; | |
840 | ||
e8b8e97f | 841 | /* Warning if RAW volume. */ |
82cae269 KK |
842 | if (dev_size < fs_size) { |
843 | u32 mb0, gb0; | |
844 | ||
845 | gb0 = format_size_gb(dev_size, &mb0); | |
846 | ntfs_warn( | |
847 | sb, | |
848 | "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only", | |
849 | gb, mb, gb0, mb0); | |
850 | sb->s_flags |= SB_RDONLY; | |
851 | } | |
852 | ||
853 | clusters = sbi->volume.size >> sbi->cluster_bits; | |
854 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER | |
e8b8e97f | 855 | /* 32 bits per cluster. */ |
82cae269 KK |
856 | if (clusters >> 32) { |
857 | ntfs_notice( | |
858 | sb, | |
859 | "NTFS %u.%02u Gb is too big to use 32 bits per cluster", | |
860 | gb, mb); | |
861 | goto out; | |
862 | } | |
863 | #elif BITS_PER_LONG < 64 | |
864 | #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS" | |
865 | #endif | |
866 | ||
867 | sbi->used.bitmap.nbits = clusters; | |
868 | ||
195c52bd | 869 | rec = kzalloc(record_size, GFP_NOFS); |
82cae269 KK |
870 | if (!rec) { |
871 | err = -ENOMEM; | |
872 | goto out; | |
873 | } | |
874 | ||
875 | sbi->new_rec = rec; | |
876 | rec->rhdr.sign = NTFS_FILE_SIGNATURE; | |
877 | rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET_1); | |
878 | fn = (sbi->record_size >> SECTOR_SHIFT) + 1; | |
879 | rec->rhdr.fix_num = cpu_to_le16(fn); | |
fa3cacf5 | 880 | ao = ALIGN(MFTRECORD_FIXUP_OFFSET_1 + sizeof(short) * fn, 8); |
82cae269 | 881 | rec->attr_off = cpu_to_le16(ao); |
fa3cacf5 | 882 | rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8)); |
82cae269 KK |
883 | rec->total = cpu_to_le32(sbi->record_size); |
884 | ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END; | |
885 | ||
886 | if (sbi->cluster_size < PAGE_SIZE) | |
887 | sb_set_blocksize(sb, sbi->cluster_size); | |
888 | ||
889 | sbi->block_mask = sb->s_blocksize - 1; | |
890 | sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; | |
891 | sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; | |
892 | ||
e8b8e97f | 893 | /* Maximum size for normal files. */ |
82cae269 KK |
894 | sbi->maxbytes = (clusters << sbi->cluster_bits) - 1; |
895 | ||
896 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
897 | if (clusters >= (1ull << (64 - sbi->cluster_bits))) | |
898 | sbi->maxbytes = -1; | |
899 | sbi->maxbytes_sparse = -1; | |
900 | #else | |
e8b8e97f | 901 | /* Maximum size for sparse file. */ |
82cae269 KK |
902 | sbi->maxbytes_sparse = (1ull << (sbi->cluster_bits + 32)) - 1; |
903 | #endif | |
904 | ||
905 | err = 0; | |
906 | ||
907 | out: | |
908 | brelse(bh); | |
909 | ||
910 | return err; | |
911 | } | |
912 | ||
e8b8e97f KA |
913 | /* |
914 | * ntfs_fill_super - Try to mount. | |
915 | */ | |
82cae269 KK |
916 | static int ntfs_fill_super(struct super_block *sb, void *data, int silent) |
917 | { | |
918 | int err; | |
919 | struct ntfs_sb_info *sbi; | |
920 | struct block_device *bdev = sb->s_bdev; | |
921 | struct inode *bd_inode = bdev->bd_inode; | |
922 | struct request_queue *rq = bdev_get_queue(bdev); | |
923 | struct inode *inode = NULL; | |
924 | struct ntfs_inode *ni; | |
925 | size_t i, tt; | |
926 | CLST vcn, lcn, len; | |
927 | struct ATTRIB *attr; | |
928 | const struct VOLUME_INFO *info; | |
929 | u32 idx, done, bytes; | |
930 | struct ATTR_DEF_ENTRY *t; | |
931 | u16 *upcase = NULL; | |
932 | u16 *shared; | |
933 | bool is_ro; | |
934 | struct MFT_REF ref; | |
935 | ||
936 | ref.high = 0; | |
937 | ||
195c52bd | 938 | sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS); |
82cae269 KK |
939 | if (!sbi) |
940 | return -ENOMEM; | |
941 | ||
942 | sb->s_fs_info = sbi; | |
943 | sbi->sb = sb; | |
944 | sb->s_flags |= SB_NODIRATIME; | |
945 | sb->s_magic = 0x7366746e; // "ntfs" | |
946 | sb->s_op = &ntfs_sops; | |
947 | sb->s_export_op = &ntfs_export_ops; | |
948 | sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec | |
949 | sb->s_xattr = ntfs_xattr_handlers; | |
950 | ||
951 | ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, | |
952 | DEFAULT_RATELIMIT_BURST); | |
953 | ||
954 | err = ntfs_parse_options(sb, data, silent, &sbi->options); | |
955 | if (err) | |
956 | goto out; | |
957 | ||
958 | if (!rq || !blk_queue_discard(rq) || !rq->limits.discard_granularity) { | |
959 | ; | |
960 | } else { | |
961 | sbi->discard_granularity = rq->limits.discard_granularity; | |
962 | sbi->discard_granularity_mask_inv = | |
963 | ~(u64)(sbi->discard_granularity - 1); | |
964 | } | |
965 | ||
966 | sb_set_blocksize(sb, PAGE_SIZE); | |
967 | ||
e8b8e97f | 968 | /* Parse boot. */ |
82cae269 KK |
969 | err = ntfs_init_from_boot(sb, rq ? queue_logical_block_size(rq) : 512, |
970 | bd_inode->i_size); | |
971 | if (err) | |
972 | goto out; | |
973 | ||
974 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
975 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
976 | #else | |
977 | sb->s_maxbytes = 0xFFFFFFFFull << sbi->cluster_bits; | |
978 | #endif | |
979 | ||
980 | mutex_init(&sbi->compress.mtx_lznt); | |
981 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
982 | mutex_init(&sbi->compress.mtx_xpress); | |
983 | mutex_init(&sbi->compress.mtx_lzx); | |
984 | #endif | |
985 | ||
986 | /* | |
e8b8e97f KA |
987 | * Load $Volume. This should be done before $LogFile |
988 | * 'cause 'sbi->volume.ni' is used 'ntfs_set_state'. | |
82cae269 KK |
989 | */ |
990 | ref.low = cpu_to_le32(MFT_REC_VOL); | |
991 | ref.seq = cpu_to_le16(MFT_REC_VOL); | |
992 | inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); | |
993 | if (IS_ERR(inode)) { | |
994 | err = PTR_ERR(inode); | |
995 | ntfs_err(sb, "Failed to load $Volume."); | |
996 | inode = NULL; | |
997 | goto out; | |
998 | } | |
999 | ||
1000 | ni = ntfs_i(inode); | |
1001 | ||
e8b8e97f | 1002 | /* Load and save label (not necessary). */ |
82cae269 KK |
1003 | attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); |
1004 | ||
1005 | if (!attr) { | |
1006 | /* It is ok if no ATTR_LABEL */ | |
1007 | } else if (!attr->non_res && !is_attr_ext(attr)) { | |
e8b8e97f | 1008 | /* $AttrDef allows labels to be up to 128 symbols. */ |
82cae269 KK |
1009 | err = utf16s_to_utf8s(resident_data(attr), |
1010 | le32_to_cpu(attr->res.data_size) >> 1, | |
1011 | UTF16_LITTLE_ENDIAN, sbi->volume.label, | |
1012 | sizeof(sbi->volume.label)); | |
1013 | if (err < 0) | |
1014 | sbi->volume.label[0] = 0; | |
1015 | } else { | |
e8b8e97f | 1016 | /* Should we break mounting here? */ |
82cae269 KK |
1017 | //err = -EINVAL; |
1018 | //goto out; | |
1019 | } | |
1020 | ||
1021 | attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); | |
1022 | if (!attr || is_attr_ext(attr)) { | |
1023 | err = -EINVAL; | |
1024 | goto out; | |
1025 | } | |
1026 | ||
1027 | info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO); | |
1028 | if (!info) { | |
1029 | err = -EINVAL; | |
1030 | goto out; | |
1031 | } | |
1032 | ||
1033 | sbi->volume.major_ver = info->major_ver; | |
1034 | sbi->volume.minor_ver = info->minor_ver; | |
1035 | sbi->volume.flags = info->flags; | |
1036 | ||
1037 | sbi->volume.ni = ni; | |
1038 | inode = NULL; | |
1039 | ||
e8b8e97f | 1040 | /* Load $MFTMirr to estimate recs_mirr. */ |
82cae269 KK |
1041 | ref.low = cpu_to_le32(MFT_REC_MIRR); |
1042 | ref.seq = cpu_to_le16(MFT_REC_MIRR); | |
1043 | inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); | |
1044 | if (IS_ERR(inode)) { | |
1045 | err = PTR_ERR(inode); | |
1046 | ntfs_err(sb, "Failed to load $MFTMirr."); | |
1047 | inode = NULL; | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | sbi->mft.recs_mirr = | |
1052 | ntfs_up_cluster(sbi, inode->i_size) >> sbi->record_bits; | |
1053 | ||
1054 | iput(inode); | |
1055 | ||
e8b8e97f | 1056 | /* Load $LogFile to replay. */ |
82cae269 KK |
1057 | ref.low = cpu_to_le32(MFT_REC_LOG); |
1058 | ref.seq = cpu_to_le16(MFT_REC_LOG); | |
1059 | inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); | |
1060 | if (IS_ERR(inode)) { | |
1061 | err = PTR_ERR(inode); | |
1062 | ntfs_err(sb, "Failed to load \x24LogFile."); | |
1063 | inode = NULL; | |
1064 | goto out; | |
1065 | } | |
1066 | ||
1067 | ni = ntfs_i(inode); | |
1068 | ||
1069 | err = ntfs_loadlog_and_replay(ni, sbi); | |
1070 | if (err) | |
1071 | goto out; | |
1072 | ||
1073 | iput(inode); | |
1074 | inode = NULL; | |
1075 | ||
1076 | is_ro = sb_rdonly(sbi->sb); | |
1077 | ||
1078 | if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) { | |
1079 | if (!is_ro) { | |
1080 | ntfs_warn(sb, | |
1081 | "failed to replay log file. Can't mount rw!"); | |
1082 | err = -EINVAL; | |
1083 | goto out; | |
1084 | } | |
1085 | } else if (sbi->volume.flags & VOLUME_FLAG_DIRTY) { | |
1086 | if (!is_ro && !sbi->options.force) { | |
1087 | ntfs_warn( | |
1088 | sb, | |
1089 | "volume is dirty and \"force\" flag is not set!"); | |
1090 | err = -EINVAL; | |
1091 | goto out; | |
1092 | } | |
1093 | } | |
1094 | ||
e8b8e97f | 1095 | /* Load $MFT. */ |
82cae269 KK |
1096 | ref.low = cpu_to_le32(MFT_REC_MFT); |
1097 | ref.seq = cpu_to_le16(1); | |
1098 | ||
1099 | inode = ntfs_iget5(sb, &ref, &NAME_MFT); | |
1100 | if (IS_ERR(inode)) { | |
1101 | err = PTR_ERR(inode); | |
1102 | ntfs_err(sb, "Failed to load $MFT."); | |
1103 | inode = NULL; | |
1104 | goto out; | |
1105 | } | |
1106 | ||
1107 | ni = ntfs_i(inode); | |
1108 | ||
1109 | sbi->mft.used = ni->i_valid >> sbi->record_bits; | |
1110 | tt = inode->i_size >> sbi->record_bits; | |
1111 | sbi->mft.next_free = MFT_REC_USER; | |
1112 | ||
1113 | err = wnd_init(&sbi->mft.bitmap, sb, tt); | |
1114 | if (err) | |
1115 | goto out; | |
1116 | ||
1117 | err = ni_load_all_mi(ni); | |
1118 | if (err) | |
1119 | goto out; | |
1120 | ||
1121 | sbi->mft.ni = ni; | |
1122 | ||
e8b8e97f | 1123 | /* Load $BadClus. */ |
82cae269 KK |
1124 | ref.low = cpu_to_le32(MFT_REC_BADCLUST); |
1125 | ref.seq = cpu_to_le16(MFT_REC_BADCLUST); | |
1126 | inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); | |
1127 | if (IS_ERR(inode)) { | |
1128 | err = PTR_ERR(inode); | |
1129 | ntfs_err(sb, "Failed to load $BadClus."); | |
1130 | inode = NULL; | |
1131 | goto out; | |
1132 | } | |
1133 | ||
1134 | ni = ntfs_i(inode); | |
1135 | ||
1136 | for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { | |
1137 | if (lcn == SPARSE_LCN) | |
1138 | continue; | |
1139 | ||
1140 | if (!sbi->bad_clusters) | |
1141 | ntfs_notice(sb, "Volume contains bad blocks"); | |
1142 | ||
1143 | sbi->bad_clusters += len; | |
1144 | } | |
1145 | ||
1146 | iput(inode); | |
1147 | ||
e8b8e97f | 1148 | /* Load $Bitmap. */ |
82cae269 KK |
1149 | ref.low = cpu_to_le32(MFT_REC_BITMAP); |
1150 | ref.seq = cpu_to_le16(MFT_REC_BITMAP); | |
1151 | inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); | |
1152 | if (IS_ERR(inode)) { | |
1153 | err = PTR_ERR(inode); | |
1154 | ntfs_err(sb, "Failed to load $Bitmap."); | |
1155 | inode = NULL; | |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | ni = ntfs_i(inode); | |
1160 | ||
1161 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER | |
1162 | if (inode->i_size >> 32) { | |
1163 | err = -EINVAL; | |
1164 | goto out; | |
1165 | } | |
1166 | #endif | |
1167 | ||
e8b8e97f | 1168 | /* Check bitmap boundary. */ |
82cae269 KK |
1169 | tt = sbi->used.bitmap.nbits; |
1170 | if (inode->i_size < bitmap_size(tt)) { | |
1171 | err = -EINVAL; | |
1172 | goto out; | |
1173 | } | |
1174 | ||
e8b8e97f | 1175 | /* Not necessary. */ |
82cae269 KK |
1176 | sbi->used.bitmap.set_tail = true; |
1177 | err = wnd_init(&sbi->used.bitmap, sbi->sb, tt); | |
1178 | if (err) | |
1179 | goto out; | |
1180 | ||
1181 | iput(inode); | |
1182 | ||
e8b8e97f | 1183 | /* Compute the MFT zone. */ |
82cae269 KK |
1184 | err = ntfs_refresh_zone(sbi); |
1185 | if (err) | |
1186 | goto out; | |
1187 | ||
e8b8e97f | 1188 | /* Load $AttrDef. */ |
82cae269 KK |
1189 | ref.low = cpu_to_le32(MFT_REC_ATTR); |
1190 | ref.seq = cpu_to_le16(MFT_REC_ATTR); | |
1191 | inode = ntfs_iget5(sbi->sb, &ref, &NAME_ATTRDEF); | |
1192 | if (IS_ERR(inode)) { | |
1193 | err = PTR_ERR(inode); | |
1194 | ntfs_err(sb, "Failed to load $AttrDef -> %d", err); | |
1195 | inode = NULL; | |
1196 | goto out; | |
1197 | } | |
1198 | ||
1199 | if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY)) { | |
1200 | err = -EINVAL; | |
1201 | goto out; | |
1202 | } | |
1203 | bytes = inode->i_size; | |
195c52bd | 1204 | sbi->def_table = t = kmalloc(bytes, GFP_NOFS); |
82cae269 KK |
1205 | if (!t) { |
1206 | err = -ENOMEM; | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) { | |
1211 | unsigned long tail = bytes - done; | |
1212 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1213 | ||
1214 | if (IS_ERR(page)) { | |
1215 | err = PTR_ERR(page); | |
1216 | goto out; | |
1217 | } | |
1218 | memcpy(Add2Ptr(t, done), page_address(page), | |
1219 | min(PAGE_SIZE, tail)); | |
1220 | ntfs_unmap_page(page); | |
1221 | ||
1222 | if (!idx && ATTR_STD != t->type) { | |
1223 | err = -EINVAL; | |
1224 | goto out; | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | t += 1; | |
1229 | sbi->def_entries = 1; | |
1230 | done = sizeof(struct ATTR_DEF_ENTRY); | |
1231 | sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE; | |
f8d87ed9 | 1232 | sbi->ea_max_size = 0x10000; /* default formatter value */ |
82cae269 KK |
1233 | |
1234 | while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { | |
1235 | u32 t32 = le32_to_cpu(t->type); | |
1236 | u64 sz = le64_to_cpu(t->max_sz); | |
1237 | ||
1238 | if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) | |
1239 | break; | |
1240 | ||
1241 | if (t->type == ATTR_REPARSE) | |
1242 | sbi->reparse.max_size = sz; | |
1243 | else if (t->type == ATTR_EA) | |
1244 | sbi->ea_max_size = sz; | |
1245 | ||
1246 | done += sizeof(struct ATTR_DEF_ENTRY); | |
1247 | t += 1; | |
1248 | sbi->def_entries += 1; | |
1249 | } | |
1250 | iput(inode); | |
1251 | ||
e8b8e97f | 1252 | /* Load $UpCase. */ |
82cae269 KK |
1253 | ref.low = cpu_to_le32(MFT_REC_UPCASE); |
1254 | ref.seq = cpu_to_le16(MFT_REC_UPCASE); | |
1255 | inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); | |
1256 | if (IS_ERR(inode)) { | |
1257 | err = PTR_ERR(inode); | |
1258 | ntfs_err(sb, "Failed to load \x24LogFile."); | |
1259 | inode = NULL; | |
1260 | goto out; | |
1261 | } | |
1262 | ||
1263 | ni = ntfs_i(inode); | |
1264 | ||
1265 | if (inode->i_size != 0x10000 * sizeof(short)) { | |
1266 | err = -EINVAL; | |
1267 | goto out; | |
1268 | } | |
1269 | ||
195c52bd | 1270 | sbi->upcase = upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL); |
82cae269 KK |
1271 | if (!upcase) { |
1272 | err = -ENOMEM; | |
1273 | goto out; | |
1274 | } | |
1275 | ||
1276 | for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) { | |
1277 | const __le16 *src; | |
1278 | u16 *dst = Add2Ptr(upcase, idx << PAGE_SHIFT); | |
1279 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1280 | ||
1281 | if (IS_ERR(page)) { | |
1282 | err = PTR_ERR(page); | |
1283 | goto out; | |
1284 | } | |
1285 | ||
1286 | src = page_address(page); | |
1287 | ||
1288 | #ifdef __BIG_ENDIAN | |
1289 | for (i = 0; i < PAGE_SIZE / sizeof(u16); i++) | |
1290 | *dst++ = le16_to_cpu(*src++); | |
1291 | #else | |
1292 | memcpy(dst, src, PAGE_SIZE); | |
1293 | #endif | |
1294 | ntfs_unmap_page(page); | |
1295 | } | |
1296 | ||
1297 | shared = ntfs_set_shared(upcase, 0x10000 * sizeof(short)); | |
1298 | if (shared && upcase != shared) { | |
1299 | sbi->upcase = shared; | |
195c52bd | 1300 | kvfree(upcase); |
82cae269 KK |
1301 | } |
1302 | ||
1303 | iput(inode); | |
1304 | inode = NULL; | |
1305 | ||
1306 | if (is_ntfs3(sbi)) { | |
e8b8e97f | 1307 | /* Load $Secure. */ |
82cae269 KK |
1308 | err = ntfs_security_init(sbi); |
1309 | if (err) | |
1310 | goto out; | |
1311 | ||
e8b8e97f | 1312 | /* Load $Extend. */ |
82cae269 KK |
1313 | err = ntfs_extend_init(sbi); |
1314 | if (err) | |
1315 | goto load_root; | |
1316 | ||
e8b8e97f | 1317 | /* Load $Extend\$Reparse. */ |
82cae269 KK |
1318 | err = ntfs_reparse_init(sbi); |
1319 | if (err) | |
1320 | goto load_root; | |
1321 | ||
e8b8e97f | 1322 | /* Load $Extend\$ObjId. */ |
82cae269 KK |
1323 | err = ntfs_objid_init(sbi); |
1324 | if (err) | |
1325 | goto load_root; | |
1326 | } | |
1327 | ||
1328 | load_root: | |
e8b8e97f | 1329 | /* Load root. */ |
82cae269 KK |
1330 | ref.low = cpu_to_le32(MFT_REC_ROOT); |
1331 | ref.seq = cpu_to_le16(MFT_REC_ROOT); | |
1332 | inode = ntfs_iget5(sb, &ref, &NAME_ROOT); | |
1333 | if (IS_ERR(inode)) { | |
1334 | err = PTR_ERR(inode); | |
1335 | ntfs_err(sb, "Failed to load root."); | |
1336 | inode = NULL; | |
1337 | goto out; | |
1338 | } | |
1339 | ||
1340 | ni = ntfs_i(inode); | |
1341 | ||
1342 | sb->s_root = d_make_root(inode); | |
1343 | ||
1344 | if (!sb->s_root) { | |
1345 | err = -EINVAL; | |
1346 | goto out; | |
1347 | } | |
1348 | ||
1349 | return 0; | |
1350 | ||
1351 | out: | |
1352 | iput(inode); | |
1353 | ||
1354 | if (sb->s_root) { | |
1355 | d_drop(sb->s_root); | |
1356 | sb->s_root = NULL; | |
1357 | } | |
1358 | ||
1359 | put_ntfs(sbi); | |
1360 | ||
1361 | sb->s_fs_info = NULL; | |
1362 | return err; | |
1363 | } | |
1364 | ||
1365 | void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) | |
1366 | { | |
1367 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1368 | struct block_device *bdev = sb->s_bdev; | |
1369 | sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; | |
1370 | unsigned long blocks = (u64)len * sbi->blocks_per_cluster; | |
1371 | unsigned long cnt = 0; | |
1372 | unsigned long limit = global_zone_page_state(NR_FREE_PAGES) | |
1373 | << (PAGE_SHIFT - sb->s_blocksize_bits); | |
1374 | ||
1375 | if (limit >= 0x2000) | |
1376 | limit -= 0x1000; | |
1377 | else if (limit < 32) | |
1378 | limit = 32; | |
1379 | else | |
1380 | limit >>= 1; | |
1381 | ||
1382 | while (blocks--) { | |
1383 | clean_bdev_aliases(bdev, devblock++, 1); | |
1384 | if (cnt++ >= limit) { | |
1385 | sync_blockdev(bdev); | |
1386 | cnt = 0; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | /* | |
e8b8e97f | 1392 | * ntfs_discard - Issue a discard request (trim for SSD). |
82cae269 KK |
1393 | */ |
1394 | int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) | |
1395 | { | |
1396 | int err; | |
1397 | u64 lbo, bytes, start, end; | |
1398 | struct super_block *sb; | |
1399 | ||
1400 | if (sbi->used.next_free_lcn == lcn + len) | |
1401 | sbi->used.next_free_lcn = lcn; | |
1402 | ||
1403 | if (sbi->flags & NTFS_FLAGS_NODISCARD) | |
1404 | return -EOPNOTSUPP; | |
1405 | ||
1406 | if (!sbi->options.discard) | |
1407 | return -EOPNOTSUPP; | |
1408 | ||
1409 | lbo = (u64)lcn << sbi->cluster_bits; | |
1410 | bytes = (u64)len << sbi->cluster_bits; | |
1411 | ||
e8b8e97f | 1412 | /* Align up 'start' on discard_granularity. */ |
82cae269 KK |
1413 | start = (lbo + sbi->discard_granularity - 1) & |
1414 | sbi->discard_granularity_mask_inv; | |
e8b8e97f | 1415 | /* Align down 'end' on discard_granularity. */ |
82cae269 KK |
1416 | end = (lbo + bytes) & sbi->discard_granularity_mask_inv; |
1417 | ||
1418 | sb = sbi->sb; | |
1419 | if (start >= end) | |
1420 | return 0; | |
1421 | ||
1422 | err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, | |
1423 | GFP_NOFS, 0); | |
1424 | ||
1425 | if (err == -EOPNOTSUPP) | |
1426 | sbi->flags |= NTFS_FLAGS_NODISCARD; | |
1427 | ||
1428 | return err; | |
1429 | } | |
1430 | ||
1431 | static struct dentry *ntfs_mount(struct file_system_type *fs_type, int flags, | |
1432 | const char *dev_name, void *data) | |
1433 | { | |
1434 | return mount_bdev(fs_type, flags, dev_name, data, ntfs_fill_super); | |
1435 | } | |
1436 | ||
1437 | // clang-format off | |
1438 | static struct file_system_type ntfs_fs_type = { | |
1439 | .owner = THIS_MODULE, | |
1440 | .name = "ntfs3", | |
1441 | .mount = ntfs_mount, | |
1442 | .kill_sb = kill_block_super, | |
1443 | .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, | |
1444 | }; | |
1445 | // clang-format on | |
1446 | ||
1447 | static int __init init_ntfs_fs(void) | |
1448 | { | |
1449 | int err; | |
1450 | ||
1451 | pr_notice("ntfs3: Index binary search\n"); | |
1452 | pr_notice("ntfs3: Hot fix free clusters\n"); | |
1453 | pr_notice("ntfs3: Max link count %u\n", NTFS_LINK_MAX); | |
1454 | ||
1455 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL | |
1456 | pr_notice("ntfs3: Enabled Linux POSIX ACLs support\n"); | |
1457 | #endif | |
1458 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
1459 | pr_notice("ntfs3: Activated 64 bits per cluster\n"); | |
1460 | #else | |
1461 | pr_notice("ntfs3: Activated 32 bits per cluster\n"); | |
1462 | #endif | |
1463 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
e8b8e97f | 1464 | pr_notice("ntfs3: Read-only LZX/Xpress compression included\n"); |
82cae269 KK |
1465 | #endif |
1466 | ||
1467 | err = ntfs3_init_bitmap(); | |
1468 | if (err) | |
1469 | return err; | |
1470 | ||
1471 | ntfs_inode_cachep = kmem_cache_create( | |
1472 | "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, | |
1473 | (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT), | |
1474 | init_once); | |
1475 | if (!ntfs_inode_cachep) { | |
1476 | err = -ENOMEM; | |
1477 | goto out1; | |
1478 | } | |
1479 | ||
1480 | err = register_filesystem(&ntfs_fs_type); | |
1481 | if (err) | |
1482 | goto out; | |
1483 | ||
1484 | return 0; | |
1485 | out: | |
1486 | kmem_cache_destroy(ntfs_inode_cachep); | |
1487 | out1: | |
1488 | ntfs3_exit_bitmap(); | |
1489 | return err; | |
1490 | } | |
1491 | ||
1492 | static void __exit exit_ntfs_fs(void) | |
1493 | { | |
1494 | if (ntfs_inode_cachep) { | |
1495 | rcu_barrier(); | |
1496 | kmem_cache_destroy(ntfs_inode_cachep); | |
1497 | } | |
1498 | ||
1499 | unregister_filesystem(&ntfs_fs_type); | |
1500 | ntfs3_exit_bitmap(); | |
1501 | } | |
1502 | ||
1503 | MODULE_LICENSE("GPL"); | |
1504 | MODULE_DESCRIPTION("ntfs3 read/write filesystem"); | |
1505 | MODULE_INFO(behaviour, "Index binary search"); | |
1506 | MODULE_INFO(behaviour, "Hot fix free clusters"); | |
1507 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL | |
1508 | MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); | |
1509 | #endif | |
1510 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
1511 | MODULE_INFO(cluster, "Activated 64 bits per cluster"); | |
1512 | #else | |
1513 | MODULE_INFO(cluster, "Activated 32 bits per cluster"); | |
1514 | #endif | |
1515 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1516 | MODULE_INFO(compression, "Read-only lzx/xpress compression included"); | |
1517 | #endif | |
1518 | ||
1519 | MODULE_AUTHOR("Konstantin Komarov"); | |
1520 | MODULE_ALIAS_FS("ntfs3"); | |
1521 | ||
1522 | module_init(init_ntfs_fs); | |
1523 | module_exit(exit_ntfs_fs); |