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