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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 | * | |
bd6ae049 KK |
24 | * ntfs allows up to 2^64 clusters per volume. |
25 | * It means you should use 64 bits lcn to operate with ntfs. | |
26 | * Implementation of ntfs.sys uses only 32 bits lcn. | |
27 | * Default ntfs3 uses 32 bits lcn too. | |
28 | * ntfs3 built with CONFIG_NTFS3_64BIT_CLUSTER (ntfs3_64) uses 64 bits per lcn. | |
29 | * | |
30 | * | |
31 | * ntfs limits, cluster size is 4K (2^12) | |
32 | * ----------------------------------------------------------------------------- | |
33 | * | Volume size | Clusters | ntfs.sys | ntfs3 | ntfs3_64 | mkntfs | chkdsk | | |
34 | * ----------------------------------------------------------------------------- | |
35 | * | < 16T, 2^44 | < 2^32 | yes | yes | yes | yes | yes | | |
36 | * | > 16T, 2^44 | > 2^32 | no | no | yes | yes | yes | | |
37 | * ----------------------------------------------------------|------------------ | |
38 | * | |
39 | * To mount large volumes as ntfs one should use large cluster size (up to 2M) | |
40 | * The maximum volume size in this case is 2^32 * 2^21 = 2^53 = 8P | |
41 | * | |
96de65a9 | 42 | * ntfs limits, cluster size is 2M (2^21) |
bd6ae049 | 43 | * ----------------------------------------------------------------------------- |
96de65a9 KK |
44 | * | < 8P, 2^53 | < 2^32 | yes | yes | yes | yes | yes | |
45 | * | > 8P, 2^53 | > 2^32 | no | no | yes | yes | yes | | |
bd6ae049 KK |
46 | * ----------------------------------------------------------|------------------ |
47 | * | |
82cae269 KK |
48 | */ |
49 | ||
82cae269 KK |
50 | #include <linux/blkdev.h> |
51 | #include <linux/buffer_head.h> | |
52 | #include <linux/exportfs.h> | |
53 | #include <linux/fs.h> | |
610f8f5a KA |
54 | #include <linux/fs_context.h> |
55 | #include <linux/fs_parser.h> | |
528c9b3d | 56 | #include <linux/log2.h> |
cd39981f | 57 | #include <linux/minmax.h> |
82cae269 KK |
58 | #include <linux/module.h> |
59 | #include <linux/nls.h> | |
82cae269 KK |
60 | #include <linux/seq_file.h> |
61 | #include <linux/statfs.h> | |
62 | ||
63 | #include "debug.h" | |
64 | #include "ntfs.h" | |
65 | #include "ntfs_fs.h" | |
66 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
67 | #include "lib/lib.h" | |
68 | #endif | |
69 | ||
70 | #ifdef CONFIG_PRINTK | |
71 | /* | |
e8b8e97f KA |
72 | * ntfs_printk - Trace warnings/notices/errors. |
73 | * | |
82cae269 KK |
74 | * Thanks Joe Perches <joe@perches.com> for implementation |
75 | */ | |
76 | void ntfs_printk(const struct super_block *sb, const char *fmt, ...) | |
77 | { | |
78 | struct va_format vaf; | |
79 | va_list args; | |
80 | int level; | |
81 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
82 | ||
e8b8e97f | 83 | /* Should we use different ratelimits for warnings/notices/errors? */ |
82cae269 KK |
84 | if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) |
85 | return; | |
86 | ||
87 | va_start(args, fmt); | |
88 | ||
89 | level = printk_get_level(fmt); | |
90 | vaf.fmt = printk_skip_level(fmt); | |
91 | vaf.va = &args; | |
92 | printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); | |
93 | ||
94 | va_end(args); | |
95 | } | |
96 | ||
97 | static char s_name_buf[512]; | |
e8b8e97f | 98 | static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'. |
82cae269 | 99 | |
e8b8e97f KA |
100 | /* |
101 | * ntfs_inode_printk | |
102 | * | |
103 | * Print warnings/notices/errors about inode using name or inode number. | |
104 | */ | |
82cae269 KK |
105 | void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) |
106 | { | |
107 | struct super_block *sb = inode->i_sb; | |
108 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
109 | char *name; | |
110 | va_list args; | |
111 | struct va_format vaf; | |
112 | int level; | |
113 | ||
114 | if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) | |
115 | return; | |
116 | ||
e8b8e97f | 117 | /* Use static allocated buffer, if possible. */ |
96de65a9 KK |
118 | name = atomic_dec_and_test(&s_name_buf_cnt) ? |
119 | s_name_buf : | |
120 | kmalloc(sizeof(s_name_buf), GFP_NOFS); | |
82cae269 KK |
121 | |
122 | if (name) { | |
123 | struct dentry *de = d_find_alias(inode); | |
124 | const u32 name_len = ARRAY_SIZE(s_name_buf) - 1; | |
125 | ||
126 | if (de) { | |
127 | spin_lock(&de->d_lock); | |
128 | snprintf(name, name_len, " \"%s\"", de->d_name.name); | |
129 | spin_unlock(&de->d_lock); | |
e8b8e97f | 130 | name[name_len] = 0; /* To be sure. */ |
82cae269 KK |
131 | } else { |
132 | name[0] = 0; | |
133 | } | |
e8b8e97f | 134 | dput(de); /* Cocci warns if placed in branch "if (de)" */ |
82cae269 KK |
135 | } |
136 | ||
137 | va_start(args, fmt); | |
138 | ||
139 | level = printk_get_level(fmt); | |
140 | vaf.fmt = printk_skip_level(fmt); | |
141 | vaf.va = &args; | |
142 | ||
143 | printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level, | |
144 | sb->s_id, inode->i_ino, name ? name : "", &vaf); | |
145 | ||
146 | va_end(args); | |
147 | ||
148 | atomic_inc(&s_name_buf_cnt); | |
149 | if (name != s_name_buf) | |
150 | kfree(name); | |
151 | } | |
152 | #endif | |
153 | ||
154 | /* | |
155 | * Shared memory struct. | |
156 | * | |
e8b8e97f KA |
157 | * On-disk ntfs's upcase table is created by ntfs formatter. |
158 | * 'upcase' table is 128K bytes of memory. | |
159 | * We should read it into memory when mounting. | |
160 | * Several ntfs volumes likely use the same 'upcase' table. | |
161 | * It is good idea to share in-memory 'upcase' table between different volumes. | |
162 | * Unfortunately winxp/vista/win7 use different upcase tables. | |
82cae269 KK |
163 | */ |
164 | static DEFINE_SPINLOCK(s_shared_lock); | |
165 | ||
166 | static struct { | |
167 | void *ptr; | |
168 | u32 len; | |
169 | int cnt; | |
170 | } s_shared[8]; | |
171 | ||
172 | /* | |
173 | * ntfs_set_shared | |
174 | * | |
e8b8e97f KA |
175 | * Return: |
176 | * * @ptr - If pointer was saved in shared memory. | |
177 | * * NULL - If pointer was not shared. | |
82cae269 KK |
178 | */ |
179 | void *ntfs_set_shared(void *ptr, u32 bytes) | |
180 | { | |
181 | void *ret = NULL; | |
182 | int i, j = -1; | |
183 | ||
184 | spin_lock(&s_shared_lock); | |
185 | for (i = 0; i < ARRAY_SIZE(s_shared); i++) { | |
186 | if (!s_shared[i].cnt) { | |
187 | j = i; | |
188 | } else if (bytes == s_shared[i].len && | |
189 | !memcmp(s_shared[i].ptr, ptr, bytes)) { | |
190 | s_shared[i].cnt += 1; | |
191 | ret = s_shared[i].ptr; | |
192 | break; | |
193 | } | |
194 | } | |
195 | ||
196 | if (!ret && j != -1) { | |
197 | s_shared[j].ptr = ptr; | |
198 | s_shared[j].len = bytes; | |
199 | s_shared[j].cnt = 1; | |
200 | ret = ptr; | |
201 | } | |
202 | spin_unlock(&s_shared_lock); | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | /* | |
208 | * ntfs_put_shared | |
209 | * | |
e8b8e97f KA |
210 | * Return: |
211 | * * @ptr - If pointer is not shared anymore. | |
212 | * * NULL - If pointer is still shared. | |
82cae269 KK |
213 | */ |
214 | void *ntfs_put_shared(void *ptr) | |
215 | { | |
216 | void *ret = ptr; | |
217 | int i; | |
218 | ||
219 | spin_lock(&s_shared_lock); | |
220 | for (i = 0; i < ARRAY_SIZE(s_shared); i++) { | |
221 | if (s_shared[i].cnt && s_shared[i].ptr == ptr) { | |
222 | if (--s_shared[i].cnt) | |
223 | ret = NULL; | |
224 | break; | |
225 | } | |
226 | } | |
227 | spin_unlock(&s_shared_lock); | |
228 | ||
229 | return ret; | |
230 | } | |
231 | ||
610f8f5a | 232 | static inline void put_mount_options(struct ntfs_mount_options *options) |
82cae269 | 233 | { |
610f8f5a | 234 | kfree(options->nls_name); |
82cae269 | 235 | unload_nls(options->nls); |
610f8f5a | 236 | kfree(options); |
82cae269 KK |
237 | } |
238 | ||
239 | enum Opt { | |
240 | Opt_uid, | |
241 | Opt_gid, | |
242 | Opt_umask, | |
243 | Opt_dmask, | |
244 | Opt_fmask, | |
245 | Opt_immutable, | |
246 | Opt_discard, | |
247 | Opt_force, | |
248 | Opt_sparse, | |
249 | Opt_nohidden, | |
098250db | 250 | Opt_hide_dot_files, |
1d07a9df | 251 | Opt_windows_names, |
82cae269 KK |
252 | Opt_showmeta, |
253 | Opt_acl, | |
e274cde8 | 254 | Opt_iocharset, |
82cae269 | 255 | Opt_prealloc, |
a3a956c7 | 256 | Opt_nocase, |
82cae269 KK |
257 | Opt_err, |
258 | }; | |
259 | ||
610f8f5a KA |
260 | static const struct fs_parameter_spec ntfs_fs_parameters[] = { |
261 | fsparam_u32("uid", Opt_uid), | |
262 | fsparam_u32("gid", Opt_gid), | |
263 | fsparam_u32oct("umask", Opt_umask), | |
264 | fsparam_u32oct("dmask", Opt_dmask), | |
265 | fsparam_u32oct("fmask", Opt_fmask), | |
266 | fsparam_flag_no("sys_immutable", Opt_immutable), | |
267 | fsparam_flag_no("discard", Opt_discard), | |
268 | fsparam_flag_no("force", Opt_force), | |
269 | fsparam_flag_no("sparse", Opt_sparse), | |
9d1939f4 | 270 | fsparam_flag_no("hidden", Opt_nohidden), |
dc0fcc99 | 271 | fsparam_flag_no("hide_dot_files", Opt_hide_dot_files), |
1d07a9df | 272 | fsparam_flag_no("windows_names", Opt_windows_names), |
610f8f5a | 273 | fsparam_flag_no("showmeta", Opt_showmeta), |
16b3dbfb KK |
274 | fsparam_flag_no("acl", Opt_acl), |
275 | fsparam_string("iocharset", Opt_iocharset), | |
610f8f5a | 276 | fsparam_flag_no("prealloc", Opt_prealloc), |
a3a956c7 | 277 | fsparam_flag_no("nocase", Opt_nocase), |
610f8f5a | 278 | {} |
82cae269 KK |
279 | }; |
280 | ||
610f8f5a KA |
281 | /* |
282 | * Load nls table or if @nls is utf8 then return NULL. | |
283 | */ | |
284 | static struct nls_table *ntfs_load_nls(char *nls) | |
82cae269 | 285 | { |
610f8f5a | 286 | struct nls_table *ret; |
82cae269 | 287 | |
610f8f5a KA |
288 | if (!nls) |
289 | nls = CONFIG_NLS_DEFAULT; | |
82cae269 | 290 | |
610f8f5a KA |
291 | if (strcmp(nls, "utf8") == 0) |
292 | return NULL; | |
82cae269 | 293 | |
610f8f5a KA |
294 | if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0) |
295 | return load_nls_default(); | |
82cae269 | 296 | |
610f8f5a KA |
297 | ret = load_nls(nls); |
298 | if (ret) | |
299 | return ret; | |
82cae269 | 300 | |
610f8f5a KA |
301 | return ERR_PTR(-EINVAL); |
302 | } | |
303 | ||
304 | static int ntfs_fs_parse_param(struct fs_context *fc, | |
305 | struct fs_parameter *param) | |
306 | { | |
307 | struct ntfs_mount_options *opts = fc->fs_private; | |
308 | struct fs_parse_result result; | |
309 | int opt; | |
310 | ||
311 | opt = fs_parse(fc, ntfs_fs_parameters, param, &result); | |
312 | if (opt < 0) | |
313 | return opt; | |
314 | ||
315 | switch (opt) { | |
316 | case Opt_uid: | |
317 | opts->fs_uid = make_kuid(current_user_ns(), result.uint_32); | |
318 | if (!uid_valid(opts->fs_uid)) | |
319 | return invalf(fc, "ntfs3: Invalid value for uid."); | |
610f8f5a KA |
320 | break; |
321 | case Opt_gid: | |
322 | opts->fs_gid = make_kgid(current_user_ns(), result.uint_32); | |
323 | if (!gid_valid(opts->fs_gid)) | |
324 | return invalf(fc, "ntfs3: Invalid value for gid."); | |
610f8f5a KA |
325 | break; |
326 | case Opt_umask: | |
327 | if (result.uint_32 & ~07777) | |
328 | return invalf(fc, "ntfs3: Invalid value for umask."); | |
329 | opts->fs_fmask_inv = ~result.uint_32; | |
330 | opts->fs_dmask_inv = ~result.uint_32; | |
331 | opts->fmask = 1; | |
332 | opts->dmask = 1; | |
333 | break; | |
334 | case Opt_dmask: | |
335 | if (result.uint_32 & ~07777) | |
336 | return invalf(fc, "ntfs3: Invalid value for dmask."); | |
337 | opts->fs_dmask_inv = ~result.uint_32; | |
338 | opts->dmask = 1; | |
339 | break; | |
340 | case Opt_fmask: | |
341 | if (result.uint_32 & ~07777) | |
342 | return invalf(fc, "ntfs3: Invalid value for fmask."); | |
343 | opts->fs_fmask_inv = ~result.uint_32; | |
344 | opts->fmask = 1; | |
345 | break; | |
346 | case Opt_immutable: | |
347 | opts->sys_immutable = result.negated ? 0 : 1; | |
348 | break; | |
349 | case Opt_discard: | |
350 | opts->discard = result.negated ? 0 : 1; | |
351 | break; | |
352 | case Opt_force: | |
353 | opts->force = result.negated ? 0 : 1; | |
354 | break; | |
355 | case Opt_sparse: | |
356 | opts->sparse = result.negated ? 0 : 1; | |
357 | break; | |
358 | case Opt_nohidden: | |
9d1939f4 | 359 | opts->nohidden = result.negated ? 1 : 0; |
610f8f5a | 360 | break; |
098250db | 361 | case Opt_hide_dot_files: |
4c9ba192 | 362 | opts->hide_dot_files = result.negated ? 0 : 1; |
098250db | 363 | break; |
1d07a9df DP |
364 | case Opt_windows_names: |
365 | opts->windows_names = result.negated ? 0 : 1; | |
366 | break; | |
16b3dbfb KK |
367 | case Opt_showmeta: |
368 | opts->showmeta = result.negated ? 0 : 1; | |
369 | break; | |
610f8f5a KA |
370 | case Opt_acl: |
371 | if (!result.negated) | |
82cae269 | 372 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL |
610f8f5a | 373 | fc->sb_flags |= SB_POSIXACL; |
82cae269 | 374 | #else |
96de65a9 KK |
375 | return invalf( |
376 | fc, "ntfs3: Support for ACL not compiled in!"); | |
82cae269 | 377 | #endif |
610f8f5a KA |
378 | else |
379 | fc->sb_flags &= ~SB_POSIXACL; | |
380 | break; | |
e274cde8 | 381 | case Opt_iocharset: |
610f8f5a KA |
382 | kfree(opts->nls_name); |
383 | opts->nls_name = param->string; | |
384 | param->string = NULL; | |
385 | break; | |
386 | case Opt_prealloc: | |
387 | opts->prealloc = result.negated ? 0 : 1; | |
388 | break; | |
a3a956c7 KK |
389 | case Opt_nocase: |
390 | opts->nocase = result.negated ? 1 : 0; | |
391 | break; | |
610f8f5a KA |
392 | default: |
393 | /* Should not be here unless we forget add case. */ | |
394 | return -EINVAL; | |
82cae269 | 395 | } |
82cae269 KK |
396 | return 0; |
397 | } | |
398 | ||
610f8f5a | 399 | static int ntfs_fs_reconfigure(struct fs_context *fc) |
82cae269 | 400 | { |
610f8f5a | 401 | struct super_block *sb = fc->root->d_sb; |
82cae269 | 402 | struct ntfs_sb_info *sbi = sb->s_fs_info; |
610f8f5a KA |
403 | struct ntfs_mount_options *new_opts = fc->fs_private; |
404 | int ro_rw; | |
82cae269 | 405 | |
610f8f5a | 406 | ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY); |
82cae269 | 407 | if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { |
96de65a9 KK |
408 | errorf(fc, |
409 | "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); | |
610f8f5a KA |
410 | return -EINVAL; |
411 | } | |
412 | ||
413 | new_opts->nls = ntfs_load_nls(new_opts->nls_name); | |
414 | if (IS_ERR(new_opts->nls)) { | |
415 | new_opts->nls = NULL; | |
96de65a9 KK |
416 | errorf(fc, "ntfs3: Cannot load iocharset %s", |
417 | new_opts->nls_name); | |
610f8f5a | 418 | return -EINVAL; |
82cae269 | 419 | } |
610f8f5a | 420 | if (new_opts->nls != sbi->options->nls) |
96de65a9 KK |
421 | return invalf( |
422 | fc, | |
423 | "ntfs3: Cannot use different iocharset when remounting!"); | |
82cae269 KK |
424 | |
425 | sync_filesystem(sb); | |
426 | ||
427 | if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && | |
610f8f5a | 428 | !new_opts->force) { |
96de65a9 KK |
429 | errorf(fc, |
430 | "ntfs3: Volume is dirty and \"force\" flag is not set!"); | |
610f8f5a | 431 | return -EINVAL; |
82cae269 KK |
432 | } |
433 | ||
cd39981f | 434 | swap(sbi->options, fc->fs_private); |
82cae269 | 435 | |
610f8f5a | 436 | return 0; |
82cae269 KK |
437 | } |
438 | ||
439 | static struct kmem_cache *ntfs_inode_cachep; | |
440 | ||
441 | static struct inode *ntfs_alloc_inode(struct super_block *sb) | |
442 | { | |
fd60b288 | 443 | struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS); |
82cae269 KK |
444 | |
445 | if (!ni) | |
446 | return NULL; | |
447 | ||
448 | memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode)); | |
82cae269 | 449 | mutex_init(&ni->ni_lock); |
82cae269 KK |
450 | return &ni->vfs_inode; |
451 | } | |
452 | ||
ae6b47b5 | 453 | static void ntfs_free_inode(struct inode *inode) |
82cae269 | 454 | { |
82cae269 KK |
455 | struct ntfs_inode *ni = ntfs_i(inode); |
456 | ||
457 | mutex_destroy(&ni->ni_lock); | |
82cae269 KK |
458 | kmem_cache_free(ntfs_inode_cachep, ni); |
459 | } | |
460 | ||
82cae269 KK |
461 | static void init_once(void *foo) |
462 | { | |
463 | struct ntfs_inode *ni = foo; | |
464 | ||
465 | inode_init_once(&ni->vfs_inode); | |
466 | } | |
467 | ||
e8b8e97f KA |
468 | /* |
469 | * put_ntfs - Noinline to reduce binary size. | |
470 | */ | |
82cae269 KK |
471 | static noinline void put_ntfs(struct ntfs_sb_info *sbi) |
472 | { | |
195c52bd KA |
473 | kfree(sbi->new_rec); |
474 | kvfree(ntfs_put_shared(sbi->upcase)); | |
475 | kfree(sbi->def_table); | |
82cae269 KK |
476 | |
477 | wnd_close(&sbi->mft.bitmap); | |
478 | wnd_close(&sbi->used.bitmap); | |
479 | ||
480 | if (sbi->mft.ni) | |
481 | iput(&sbi->mft.ni->vfs_inode); | |
482 | ||
483 | if (sbi->security.ni) | |
484 | iput(&sbi->security.ni->vfs_inode); | |
485 | ||
486 | if (sbi->reparse.ni) | |
487 | iput(&sbi->reparse.ni->vfs_inode); | |
488 | ||
489 | if (sbi->objid.ni) | |
490 | iput(&sbi->objid.ni->vfs_inode); | |
491 | ||
492 | if (sbi->volume.ni) | |
493 | iput(&sbi->volume.ni->vfs_inode); | |
494 | ||
495 | ntfs_update_mftmirr(sbi, 0); | |
496 | ||
497 | indx_clear(&sbi->security.index_sii); | |
498 | indx_clear(&sbi->security.index_sdh); | |
499 | indx_clear(&sbi->reparse.index_r); | |
500 | indx_clear(&sbi->objid.index_o); | |
195c52bd | 501 | kfree(sbi->compress.lznt); |
82cae269 KK |
502 | #ifdef CONFIG_NTFS3_LZX_XPRESS |
503 | xpress_free_decompressor(sbi->compress.xpress); | |
504 | lzx_free_decompressor(sbi->compress.lzx); | |
505 | #endif | |
195c52bd | 506 | kfree(sbi); |
82cae269 KK |
507 | } |
508 | ||
509 | static void ntfs_put_super(struct super_block *sb) | |
510 | { | |
511 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
512 | ||
e8b8e97f | 513 | /* Mark rw ntfs as clear, if possible. */ |
82cae269 KK |
514 | ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); |
515 | ||
610f8f5a | 516 | put_mount_options(sbi->options); |
82cae269 | 517 | put_ntfs(sbi); |
610f8f5a | 518 | sb->s_fs_info = NULL; |
82cae269 KK |
519 | |
520 | sync_blockdev(sb->s_bdev); | |
521 | } | |
522 | ||
523 | static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
524 | { | |
525 | struct super_block *sb = dentry->d_sb; | |
526 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
527 | struct wnd_bitmap *wnd = &sbi->used.bitmap; | |
528 | ||
529 | buf->f_type = sb->s_magic; | |
530 | buf->f_bsize = sbi->cluster_size; | |
531 | buf->f_blocks = wnd->nbits; | |
532 | ||
533 | buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd); | |
534 | buf->f_fsid.val[0] = sbi->volume.ser_num; | |
535 | buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32); | |
536 | buf->f_namelen = NTFS_NAME_LEN; | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | static int ntfs_show_options(struct seq_file *m, struct dentry *root) | |
542 | { | |
543 | struct super_block *sb = root->d_sb; | |
544 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
564c97bd | 545 | struct ntfs_mount_options *opts = sbi->options; |
82cae269 KK |
546 | struct user_namespace *user_ns = seq_user_ns(m); |
547 | ||
96de65a9 KK |
548 | seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid)); |
549 | seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid)); | |
82cae269 | 550 | if (opts->dmask) |
f27b92ec | 551 | seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff); |
16b3dbfb KK |
552 | if (opts->fmask) |
553 | seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff); | |
82cae269 KK |
554 | if (opts->sys_immutable) |
555 | seq_puts(m, ",sys_immutable"); | |
556 | if (opts->discard) | |
557 | seq_puts(m, ",discard"); | |
16b3dbfb KK |
558 | if (opts->force) |
559 | seq_puts(m, ",force"); | |
82cae269 KK |
560 | if (opts->sparse) |
561 | seq_puts(m, ",sparse"); | |
82cae269 KK |
562 | if (opts->nohidden) |
563 | seq_puts(m, ",nohidden"); | |
19b42450 | 564 | if (opts->hide_dot_files) |
dc0fcc99 | 565 | seq_puts(m, ",hide_dot_files"); |
16b3dbfb KK |
566 | if (opts->windows_names) |
567 | seq_puts(m, ",windows_names"); | |
568 | if (opts->showmeta) | |
569 | seq_puts(m, ",showmeta"); | |
82cae269 KK |
570 | if (sb->s_flags & SB_POSIXACL) |
571 | seq_puts(m, ",acl"); | |
16b3dbfb KK |
572 | if (opts->nls) |
573 | seq_printf(m, ",iocharset=%s", opts->nls->charset); | |
574 | else | |
575 | seq_puts(m, ",iocharset=utf8"); | |
576 | if (opts->prealloc) | |
577 | seq_puts(m, ",prealloc"); | |
578 | if (opts->nocase) | |
579 | seq_puts(m, ",nocase"); | |
82cae269 KK |
580 | |
581 | return 0; | |
582 | } | |
583 | ||
e8b8e97f KA |
584 | /* |
585 | * ntfs_sync_fs - super_operations::sync_fs | |
586 | */ | |
82cae269 KK |
587 | static int ntfs_sync_fs(struct super_block *sb, int wait) |
588 | { | |
589 | int err = 0, err2; | |
590 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
591 | struct ntfs_inode *ni; | |
592 | struct inode *inode; | |
593 | ||
594 | ni = sbi->security.ni; | |
595 | if (ni) { | |
596 | inode = &ni->vfs_inode; | |
597 | err2 = _ni_write_inode(inode, wait); | |
598 | if (err2 && !err) | |
599 | err = err2; | |
600 | } | |
601 | ||
602 | ni = sbi->objid.ni; | |
603 | if (ni) { | |
604 | inode = &ni->vfs_inode; | |
605 | err2 = _ni_write_inode(inode, wait); | |
606 | if (err2 && !err) | |
607 | err = err2; | |
608 | } | |
609 | ||
610 | ni = sbi->reparse.ni; | |
611 | if (ni) { | |
612 | inode = &ni->vfs_inode; | |
613 | err2 = _ni_write_inode(inode, wait); | |
614 | if (err2 && !err) | |
615 | err = err2; | |
616 | } | |
617 | ||
618 | if (!err) | |
619 | ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); | |
620 | ||
621 | ntfs_update_mftmirr(sbi, wait); | |
622 | ||
623 | return err; | |
624 | } | |
625 | ||
626 | static const struct super_operations ntfs_sops = { | |
627 | .alloc_inode = ntfs_alloc_inode, | |
ae6b47b5 | 628 | .free_inode = ntfs_free_inode, |
82cae269 KK |
629 | .evict_inode = ntfs_evict_inode, |
630 | .put_super = ntfs_put_super, | |
631 | .statfs = ntfs_statfs, | |
632 | .show_options = ntfs_show_options, | |
633 | .sync_fs = ntfs_sync_fs, | |
82cae269 KK |
634 | .write_inode = ntfs3_write_inode, |
635 | }; | |
636 | ||
637 | static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino, | |
638 | u32 generation) | |
639 | { | |
640 | struct MFT_REF ref; | |
641 | struct inode *inode; | |
642 | ||
643 | ref.low = cpu_to_le32(ino); | |
644 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
645 | ref.high = cpu_to_le16(ino >> 32); | |
646 | #else | |
647 | ref.high = 0; | |
648 | #endif | |
649 | ref.seq = cpu_to_le16(generation); | |
650 | ||
651 | inode = ntfs_iget5(sb, &ref, NULL); | |
652 | if (!IS_ERR(inode) && is_bad_inode(inode)) { | |
653 | iput(inode); | |
654 | inode = ERR_PTR(-ESTALE); | |
655 | } | |
656 | ||
657 | return inode; | |
658 | } | |
659 | ||
660 | static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
661 | int fh_len, int fh_type) | |
662 | { | |
663 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
664 | ntfs_export_get_inode); | |
665 | } | |
666 | ||
667 | static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
668 | int fh_len, int fh_type) | |
669 | { | |
670 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
671 | ntfs_export_get_inode); | |
672 | } | |
673 | ||
674 | /* TODO: == ntfs_sync_inode */ | |
675 | static int ntfs_nfs_commit_metadata(struct inode *inode) | |
676 | { | |
677 | return _ni_write_inode(inode, 1); | |
678 | } | |
679 | ||
680 | static const struct export_operations ntfs_export_ops = { | |
681 | .fh_to_dentry = ntfs_fh_to_dentry, | |
682 | .fh_to_parent = ntfs_fh_to_parent, | |
683 | .get_parent = ntfs3_get_parent, | |
684 | .commit_metadata = ntfs_nfs_commit_metadata, | |
685 | }; | |
686 | ||
e8b8e97f KA |
687 | /* |
688 | * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb". | |
689 | */ | |
82cae269 KK |
690 | static u32 format_size_gb(const u64 bytes, u32 *mb) |
691 | { | |
e8b8e97f | 692 | /* Do simple right 30 bit shift of 64 bit value. */ |
82cae269 KK |
693 | u64 kbytes = bytes >> 10; |
694 | u32 kbytes32 = kbytes; | |
695 | ||
696 | *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20; | |
697 | if (*mb >= 100) | |
698 | *mb = 99; | |
699 | ||
700 | return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12); | |
701 | } | |
702 | ||
703 | static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot) | |
704 | { | |
a3b77434 RD |
705 | if (boot->sectors_per_clusters <= 0x80) |
706 | return boot->sectors_per_clusters; | |
707 | if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */ | |
96de65a9 | 708 | return 1U << (-(s8)boot->sectors_per_clusters); |
a3b77434 | 709 | return -EINVAL; |
82cae269 KK |
710 | } |
711 | ||
e8b8e97f KA |
712 | /* |
713 | * ntfs_init_from_boot - Init internal info from on-disk boot sector. | |
714 | */ | |
82cae269 KK |
715 | static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, |
716 | u64 dev_size) | |
717 | { | |
718 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
719 | int err; | |
720 | u32 mb, gb, boot_sector_size, sct_per_clst, record_size; | |
dbf59e2a | 721 | u64 sectors, clusters, mlcn, mlcn2; |
82cae269 KK |
722 | struct NTFS_BOOT *boot; |
723 | struct buffer_head *bh; | |
724 | struct MFT_REC *rec; | |
725 | u16 fn, ao; | |
96de65a9 | 726 | u8 cluster_bits; |
82cae269 KK |
727 | |
728 | sbi->volume.blocks = dev_size >> PAGE_SHIFT; | |
729 | ||
730 | bh = ntfs_bread(sb, 0); | |
731 | if (!bh) | |
732 | return -EIO; | |
733 | ||
734 | err = -EINVAL; | |
735 | boot = (struct NTFS_BOOT *)bh->b_data; | |
736 | ||
e43f6ec2 KK |
737 | if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) { |
738 | ntfs_err(sb, "Boot's signature is not NTFS."); | |
82cae269 | 739 | goto out; |
e43f6ec2 | 740 | } |
82cae269 KK |
741 | |
742 | /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/ | |
743 | /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1]) | |
744 | * goto out; | |
745 | */ | |
746 | ||
e43f6ec2 KK |
747 | boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) | |
748 | boot->bytes_per_sector[0]; | |
749 | if (boot_sector_size < SECTOR_SIZE || | |
528c9b3d | 750 | !is_power_of_2(boot_sector_size)) { |
e43f6ec2 | 751 | ntfs_err(sb, "Invalid bytes per sector %u.", boot_sector_size); |
82cae269 KK |
752 | goto out; |
753 | } | |
754 | ||
755 | /* cluster size: 512, 1K, 2K, 4K, ... 2M */ | |
756 | sct_per_clst = true_sectors_per_clst(boot); | |
e43f6ec2 KK |
757 | if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) { |
758 | ntfs_err(sb, "Invalid sectors per cluster %u.", sct_per_clst); | |
82cae269 | 759 | goto out; |
e43f6ec2 KK |
760 | } |
761 | ||
762 | sbi->cluster_size = boot_sector_size * sct_per_clst; | |
763 | sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size); | |
764 | sbi->cluster_mask = sbi->cluster_size - 1; | |
765 | sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; | |
82cae269 KK |
766 | |
767 | mlcn = le64_to_cpu(boot->mft_clst); | |
768 | mlcn2 = le64_to_cpu(boot->mft2_clst); | |
769 | sectors = le64_to_cpu(boot->sectors_per_volume); | |
770 | ||
e43f6ec2 KK |
771 | if (mlcn * sct_per_clst >= sectors || mlcn2 * sct_per_clst >= sectors) { |
772 | ntfs_err( | |
773 | sb, | |
774 | "Start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", | |
775 | mlcn, mlcn2, sectors); | |
82cae269 | 776 | goto out; |
e43f6ec2 | 777 | } |
82cae269 | 778 | |
e43f6ec2 KK |
779 | sbi->record_size = record_size = |
780 | boot->record_size < 0 ? 1 << (-boot->record_size) : | |
781 | (u32)boot->record_size << cluster_bits; | |
782 | sbi->record_bits = blksize_bits(record_size); | |
783 | sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes | |
82cae269 | 784 | |
e8b8e97f | 785 | /* Check MFT record size. */ |
e43f6ec2 KK |
786 | if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) { |
787 | ntfs_err(sb, "Invalid bytes per MFT record %u (%d).", | |
788 | record_size, boot->record_size); | |
789 | goto out; | |
790 | } | |
791 | ||
792 | if (record_size > MAXIMUM_BYTES_PER_MFT) { | |
793 | ntfs_err(sb, "Unsupported bytes per MFT record %u.", | |
794 | record_size); | |
82cae269 KK |
795 | goto out; |
796 | } | |
797 | ||
e43f6ec2 KK |
798 | sbi->index_size = boot->index_size < 0 ? |
799 | 1u << (-boot->index_size) : | |
800 | (u32)boot->index_size << cluster_bits; | |
801 | ||
e8b8e97f | 802 | /* Check index record size. */ |
e43f6ec2 KK |
803 | if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) { |
804 | ntfs_err(sb, "Invalid bytes per index %u(%d).", sbi->index_size, | |
805 | boot->index_size); | |
806 | goto out; | |
807 | } | |
808 | ||
809 | if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) { | |
810 | ntfs_err(sb, "Unsupported bytes per index %u.", | |
811 | sbi->index_size); | |
82cae269 KK |
812 | goto out; |
813 | } | |
814 | ||
dbf59e2a | 815 | sbi->volume.size = sectors * boot_sector_size; |
82cae269 | 816 | |
dbf59e2a | 817 | gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb); |
82cae269 KK |
818 | |
819 | /* | |
e8b8e97f KA |
820 | * - Volume formatted and mounted with the same sector size. |
821 | * - Volume formatted 4K and mounted as 512. | |
822 | * - Volume formatted 512 and mounted as 4K. | |
82cae269 | 823 | */ |
dbf59e2a KK |
824 | if (boot_sector_size != sector_size) { |
825 | ntfs_warn( | |
826 | sb, | |
96de65a9 | 827 | "Different NTFS sector size (%u) and media sector size (%u).", |
dbf59e2a | 828 | boot_sector_size, sector_size); |
82cae269 KK |
829 | dev_size += sector_size - 1; |
830 | } | |
831 | ||
96de65a9 KK |
832 | sbi->mft.lbo = mlcn << cluster_bits; |
833 | sbi->mft.lbo2 = mlcn2 << cluster_bits; | |
82cae269 | 834 | |
09f7c338 | 835 | /* Compare boot's cluster and sector. */ |
e43f6ec2 KK |
836 | if (sbi->cluster_size < boot_sector_size) { |
837 | ntfs_err(sb, "Invalid bytes per cluster (%u).", | |
838 | sbi->cluster_size); | |
82cae269 | 839 | goto out; |
e43f6ec2 | 840 | } |
82cae269 | 841 | |
09f7c338 KK |
842 | /* Compare boot's cluster and media sector. */ |
843 | if (sbi->cluster_size < sector_size) { | |
844 | /* No way to use ntfs_get_block in this case. */ | |
845 | ntfs_err( | |
846 | sb, | |
96de65a9 | 847 | "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).", |
09f7c338 KK |
848 | sbi->cluster_size, sector_size); |
849 | goto out; | |
850 | } | |
851 | ||
82cae269 | 852 | sbi->max_bytes_per_attr = |
fa3cacf5 KA |
853 | record_size - ALIGN(MFTRECORD_FIXUP_OFFSET_1, 8) - |
854 | ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) - | |
855 | ALIGN(sizeof(enum ATTR_TYPE), 8); | |
82cae269 | 856 | |
82cae269 | 857 | sbi->volume.ser_num = le64_to_cpu(boot->serial_num); |
82cae269 | 858 | |
e8b8e97f | 859 | /* Warning if RAW volume. */ |
dbf59e2a | 860 | if (dev_size < sbi->volume.size + boot_sector_size) { |
82cae269 KK |
861 | u32 mb0, gb0; |
862 | ||
863 | gb0 = format_size_gb(dev_size, &mb0); | |
864 | ntfs_warn( | |
865 | sb, | |
96de65a9 | 866 | "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.", |
82cae269 KK |
867 | gb, mb, gb0, mb0); |
868 | sb->s_flags |= SB_RDONLY; | |
869 | } | |
870 | ||
96de65a9 | 871 | clusters = sbi->volume.size >> cluster_bits; |
82cae269 | 872 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER |
e8b8e97f | 873 | /* 32 bits per cluster. */ |
82cae269 KK |
874 | if (clusters >> 32) { |
875 | ntfs_notice( | |
876 | sb, | |
96de65a9 | 877 | "NTFS %u.%02u Gb is too big to use 32 bits per cluster.", |
82cae269 KK |
878 | gb, mb); |
879 | goto out; | |
880 | } | |
881 | #elif BITS_PER_LONG < 64 | |
882 | #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS" | |
883 | #endif | |
884 | ||
885 | sbi->used.bitmap.nbits = clusters; | |
886 | ||
195c52bd | 887 | rec = kzalloc(record_size, GFP_NOFS); |
82cae269 KK |
888 | if (!rec) { |
889 | err = -ENOMEM; | |
890 | goto out; | |
891 | } | |
892 | ||
893 | sbi->new_rec = rec; | |
894 | rec->rhdr.sign = NTFS_FILE_SIGNATURE; | |
895 | rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET_1); | |
896 | fn = (sbi->record_size >> SECTOR_SHIFT) + 1; | |
897 | rec->rhdr.fix_num = cpu_to_le16(fn); | |
fa3cacf5 | 898 | ao = ALIGN(MFTRECORD_FIXUP_OFFSET_1 + sizeof(short) * fn, 8); |
82cae269 | 899 | rec->attr_off = cpu_to_le16(ao); |
fa3cacf5 | 900 | rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8)); |
82cae269 KK |
901 | rec->total = cpu_to_le32(sbi->record_size); |
902 | ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END; | |
903 | ||
28861e3b | 904 | sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE)); |
82cae269 KK |
905 | |
906 | sbi->block_mask = sb->s_blocksize - 1; | |
907 | sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; | |
908 | sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; | |
909 | ||
e8b8e97f | 910 | /* Maximum size for normal files. */ |
96de65a9 | 911 | sbi->maxbytes = (clusters << cluster_bits) - 1; |
82cae269 KK |
912 | |
913 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
96de65a9 | 914 | if (clusters >= (1ull << (64 - cluster_bits))) |
82cae269 KK |
915 | sbi->maxbytes = -1; |
916 | sbi->maxbytes_sparse = -1; | |
28861e3b | 917 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
82cae269 | 918 | #else |
e8b8e97f | 919 | /* Maximum size for sparse file. */ |
96de65a9 KK |
920 | sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1; |
921 | sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits; | |
82cae269 KK |
922 | #endif |
923 | ||
8335ebe1 KK |
924 | /* |
925 | * Compute the MFT zone at two steps. | |
926 | * It would be nice if we are able to allocate 1/8 of | |
927 | * total clusters for MFT but not more then 512 MB. | |
928 | */ | |
96de65a9 | 929 | sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3); |
8335ebe1 | 930 | |
82cae269 KK |
931 | err = 0; |
932 | ||
933 | out: | |
934 | brelse(bh); | |
935 | ||
936 | return err; | |
937 | } | |
938 | ||
e8b8e97f KA |
939 | /* |
940 | * ntfs_fill_super - Try to mount. | |
941 | */ | |
610f8f5a | 942 | static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) |
82cae269 KK |
943 | { |
944 | int err; | |
610f8f5a | 945 | struct ntfs_sb_info *sbi = sb->s_fs_info; |
82cae269 | 946 | struct block_device *bdev = sb->s_bdev; |
e43f6ec2 | 947 | struct ntfs_mount_options *options; |
10b4f12c | 948 | struct inode *inode; |
82cae269 | 949 | struct ntfs_inode *ni; |
ec5fc720 | 950 | size_t i, tt, bad_len, bad_frags; |
82cae269 KK |
951 | CLST vcn, lcn, len; |
952 | struct ATTRIB *attr; | |
953 | const struct VOLUME_INFO *info; | |
954 | u32 idx, done, bytes; | |
955 | struct ATTR_DEF_ENTRY *t; | |
82cae269 | 956 | u16 *shared; |
82cae269 KK |
957 | struct MFT_REF ref; |
958 | ||
959 | ref.high = 0; | |
960 | ||
82cae269 | 961 | sbi->sb = sb; |
e43f6ec2 | 962 | sbi->options = options = fc->fs_private; |
cd39981f | 963 | fc->fs_private = NULL; |
82cae269 KK |
964 | sb->s_flags |= SB_NODIRATIME; |
965 | sb->s_magic = 0x7366746e; // "ntfs" | |
966 | sb->s_op = &ntfs_sops; | |
967 | sb->s_export_op = &ntfs_export_ops; | |
968 | sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec | |
969 | sb->s_xattr = ntfs_xattr_handlers; | |
e43f6ec2 | 970 | sb->s_d_op = options->nocase ? &ntfs_dentry_ops : NULL; |
82cae269 | 971 | |
e43f6ec2 KK |
972 | options->nls = ntfs_load_nls(options->nls_name); |
973 | if (IS_ERR(options->nls)) { | |
974 | options->nls = NULL; | |
975 | errorf(fc, "Cannot load nls %s", options->nls_name); | |
9b75450d KK |
976 | err = -EINVAL; |
977 | goto out; | |
610f8f5a | 978 | } |
82cae269 | 979 | |
7b47ef52 CH |
980 | if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) { |
981 | sbi->discard_granularity = bdev_discard_granularity(bdev); | |
82cae269 KK |
982 | sbi->discard_granularity_mask_inv = |
983 | ~(u64)(sbi->discard_granularity - 1); | |
984 | } | |
985 | ||
e8b8e97f | 986 | /* Parse boot. */ |
f09dac9a | 987 | err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev), |
d54f13a8 | 988 | bdev_nr_bytes(bdev)); |
82cae269 | 989 | if (err) |
9b75450d | 990 | goto out; |
82cae269 | 991 | |
82cae269 | 992 | /* |
e8b8e97f KA |
993 | * Load $Volume. This should be done before $LogFile |
994 | * 'cause 'sbi->volume.ni' is used 'ntfs_set_state'. | |
82cae269 KK |
995 | */ |
996 | ref.low = cpu_to_le32(MFT_REC_VOL); | |
997 | ref.seq = cpu_to_le16(MFT_REC_VOL); | |
998 | inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); | |
999 | if (IS_ERR(inode)) { | |
9b75450d | 1000 | err = PTR_ERR(inode); |
e43f6ec2 | 1001 | ntfs_err(sb, "Failed to load $Volume (%d).", err); |
9b75450d | 1002 | goto out; |
82cae269 KK |
1003 | } |
1004 | ||
1005 | ni = ntfs_i(inode); | |
1006 | ||
e8b8e97f | 1007 | /* Load and save label (not necessary). */ |
82cae269 KK |
1008 | attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); |
1009 | ||
1010 | if (!attr) { | |
1011 | /* It is ok if no ATTR_LABEL */ | |
1012 | } else if (!attr->non_res && !is_attr_ext(attr)) { | |
e8b8e97f | 1013 | /* $AttrDef allows labels to be up to 128 symbols. */ |
82cae269 KK |
1014 | err = utf16s_to_utf8s(resident_data(attr), |
1015 | le32_to_cpu(attr->res.data_size) >> 1, | |
1016 | UTF16_LITTLE_ENDIAN, sbi->volume.label, | |
1017 | sizeof(sbi->volume.label)); | |
1018 | if (err < 0) | |
1019 | sbi->volume.label[0] = 0; | |
1020 | } else { | |
e8b8e97f | 1021 | /* Should we break mounting here? */ |
82cae269 | 1022 | //err = -EINVAL; |
9b75450d | 1023 | //goto put_inode_out; |
82cae269 KK |
1024 | } |
1025 | ||
1026 | attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); | |
e43f6ec2 KK |
1027 | if (!attr || is_attr_ext(attr) || |
1028 | !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) { | |
1029 | ntfs_err(sb, "$Volume is corrupted."); | |
82cae269 | 1030 | err = -EINVAL; |
9b75450d | 1031 | goto put_inode_out; |
82cae269 KK |
1032 | } |
1033 | ||
1034 | sbi->volume.major_ver = info->major_ver; | |
1035 | sbi->volume.minor_ver = info->minor_ver; | |
1036 | sbi->volume.flags = info->flags; | |
82cae269 | 1037 | sbi->volume.ni = ni; |
82cae269 | 1038 | |
e8b8e97f | 1039 | /* Load $MFTMirr to estimate recs_mirr. */ |
82cae269 KK |
1040 | ref.low = cpu_to_le32(MFT_REC_MIRR); |
1041 | ref.seq = cpu_to_le16(MFT_REC_MIRR); | |
1042 | inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); | |
1043 | if (IS_ERR(inode)) { | |
9b75450d | 1044 | err = PTR_ERR(inode); |
e43f6ec2 | 1045 | ntfs_err(sb, "Failed to load $MFTMirr (%d).", err); |
9b75450d | 1046 | goto out; |
82cae269 KK |
1047 | } |
1048 | ||
e43f6ec2 KK |
1049 | sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >> |
1050 | sbi->record_bits; | |
82cae269 KK |
1051 | |
1052 | iput(inode); | |
1053 | ||
d3624466 | 1054 | /* Load LogFile to replay. */ |
82cae269 KK |
1055 | ref.low = cpu_to_le32(MFT_REC_LOG); |
1056 | ref.seq = cpu_to_le16(MFT_REC_LOG); | |
1057 | inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); | |
1058 | if (IS_ERR(inode)) { | |
9b75450d | 1059 | err = PTR_ERR(inode); |
e43f6ec2 | 1060 | ntfs_err(sb, "Failed to load \x24LogFile (%d).", err); |
9b75450d | 1061 | goto out; |
82cae269 KK |
1062 | } |
1063 | ||
1064 | ni = ntfs_i(inode); | |
1065 | ||
1066 | err = ntfs_loadlog_and_replay(ni, sbi); | |
1067 | if (err) | |
9b75450d | 1068 | goto put_inode_out; |
82cae269 KK |
1069 | |
1070 | iput(inode); | |
82cae269 | 1071 | |
82cae269 | 1072 | if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) { |
0cde7e81 | 1073 | if (!sb_rdonly(sb)) { |
82cae269 KK |
1074 | ntfs_warn(sb, |
1075 | "failed to replay log file. Can't mount rw!"); | |
9b75450d KK |
1076 | err = -EINVAL; |
1077 | goto out; | |
82cae269 KK |
1078 | } |
1079 | } else if (sbi->volume.flags & VOLUME_FLAG_DIRTY) { | |
e43f6ec2 | 1080 | if (!sb_rdonly(sb) && !options->force) { |
82cae269 KK |
1081 | ntfs_warn( |
1082 | sb, | |
1083 | "volume is dirty and \"force\" flag is not set!"); | |
9b75450d KK |
1084 | err = -EINVAL; |
1085 | goto out; | |
82cae269 KK |
1086 | } |
1087 | } | |
1088 | ||
e8b8e97f | 1089 | /* Load $MFT. */ |
82cae269 KK |
1090 | ref.low = cpu_to_le32(MFT_REC_MFT); |
1091 | ref.seq = cpu_to_le16(1); | |
1092 | ||
1093 | inode = ntfs_iget5(sb, &ref, &NAME_MFT); | |
1094 | if (IS_ERR(inode)) { | |
9b75450d | 1095 | err = PTR_ERR(inode); |
e43f6ec2 | 1096 | ntfs_err(sb, "Failed to load $MFT (%d).", err); |
9b75450d | 1097 | goto out; |
82cae269 KK |
1098 | } |
1099 | ||
1100 | ni = ntfs_i(inode); | |
1101 | ||
1102 | sbi->mft.used = ni->i_valid >> sbi->record_bits; | |
1103 | tt = inode->i_size >> sbi->record_bits; | |
1104 | sbi->mft.next_free = MFT_REC_USER; | |
1105 | ||
1106 | err = wnd_init(&sbi->mft.bitmap, sb, tt); | |
1107 | if (err) | |
9b75450d | 1108 | goto put_inode_out; |
82cae269 KK |
1109 | |
1110 | err = ni_load_all_mi(ni); | |
e43f6ec2 KK |
1111 | if (err) { |
1112 | ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err); | |
9b75450d | 1113 | goto put_inode_out; |
e43f6ec2 | 1114 | } |
82cae269 KK |
1115 | |
1116 | sbi->mft.ni = ni; | |
1117 | ||
e8b8e97f | 1118 | /* Load $Bitmap. */ |
82cae269 KK |
1119 | ref.low = cpu_to_le32(MFT_REC_BITMAP); |
1120 | ref.seq = cpu_to_le16(MFT_REC_BITMAP); | |
1121 | inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); | |
1122 | if (IS_ERR(inode)) { | |
9b75450d | 1123 | err = PTR_ERR(inode); |
e43f6ec2 | 1124 | ntfs_err(sb, "Failed to load $Bitmap (%d).", err); |
9b75450d | 1125 | goto out; |
82cae269 KK |
1126 | } |
1127 | ||
82cae269 KK |
1128 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER |
1129 | if (inode->i_size >> 32) { | |
1130 | err = -EINVAL; | |
9b75450d | 1131 | goto put_inode_out; |
82cae269 KK |
1132 | } |
1133 | #endif | |
1134 | ||
e8b8e97f | 1135 | /* Check bitmap boundary. */ |
82cae269 KK |
1136 | tt = sbi->used.bitmap.nbits; |
1137 | if (inode->i_size < bitmap_size(tt)) { | |
e43f6ec2 | 1138 | ntfs_err(sb, "$Bitmap is corrupted."); |
82cae269 | 1139 | err = -EINVAL; |
9b75450d | 1140 | goto put_inode_out; |
82cae269 KK |
1141 | } |
1142 | ||
b4f110d6 | 1143 | err = wnd_init(&sbi->used.bitmap, sb, tt); |
e43f6ec2 KK |
1144 | if (err) { |
1145 | ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err); | |
9b75450d | 1146 | goto put_inode_out; |
e43f6ec2 | 1147 | } |
82cae269 KK |
1148 | |
1149 | iput(inode); | |
1150 | ||
e8b8e97f | 1151 | /* Compute the MFT zone. */ |
82cae269 | 1152 | err = ntfs_refresh_zone(sbi); |
e43f6ec2 KK |
1153 | if (err) { |
1154 | ntfs_err(sb, "Failed to initialize MFT zone (%d).", err); | |
9b75450d | 1155 | goto out; |
e43f6ec2 | 1156 | } |
82cae269 | 1157 | |
ec5fc720 KK |
1158 | /* Load $BadClus. */ |
1159 | ref.low = cpu_to_le32(MFT_REC_BADCLUST); | |
1160 | ref.seq = cpu_to_le16(MFT_REC_BADCLUST); | |
1161 | inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); | |
1162 | if (IS_ERR(inode)) { | |
1163 | err = PTR_ERR(inode); | |
1164 | ntfs_err(sb, "Failed to load $BadClus (%d).", err); | |
1165 | goto out; | |
1166 | } | |
1167 | ||
1168 | ni = ntfs_i(inode); | |
1169 | bad_len = bad_frags = 0; | |
1170 | for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { | |
1171 | if (lcn == SPARSE_LCN) | |
1172 | continue; | |
1173 | ||
1174 | bad_len += len; | |
1175 | bad_frags += 1; | |
1176 | if (sb_rdonly(sb)) | |
1177 | continue; | |
1178 | ||
1179 | if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) { | |
1180 | /* Bad blocks marked as free in bitmap. */ | |
1181 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
1182 | } | |
1183 | } | |
1184 | if (bad_len) { | |
1185 | /* | |
1186 | * Notice about bad blocks. | |
1187 | * In normal cases these blocks are marked as used in bitmap. | |
1188 | * And we never allocate space in it. | |
1189 | */ | |
1190 | ntfs_notice(sb, | |
1191 | "Volume contains %zu bad blocks in %zu fragments.", | |
1192 | bad_len, bad_frags); | |
1193 | } | |
1194 | iput(inode); | |
1195 | ||
e8b8e97f | 1196 | /* Load $AttrDef. */ |
82cae269 KK |
1197 | ref.low = cpu_to_le32(MFT_REC_ATTR); |
1198 | ref.seq = cpu_to_le16(MFT_REC_ATTR); | |
b4f110d6 | 1199 | inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF); |
82cae269 | 1200 | if (IS_ERR(inode)) { |
9b75450d | 1201 | err = PTR_ERR(inode); |
e43f6ec2 | 1202 | ntfs_err(sb, "Failed to load $AttrDef (%d)", err); |
9b75450d | 1203 | goto out; |
82cae269 KK |
1204 | } |
1205 | ||
318d016e KK |
1206 | /* |
1207 | * Typical $AttrDef contains up to 20 entries. | |
30200ef8 | 1208 | * Check for extremely large/small size. |
318d016e KK |
1209 | */ |
1210 | if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) || | |
1211 | inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) { | |
1212 | ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).", | |
1213 | inode->i_size); | |
82cae269 | 1214 | err = -EINVAL; |
9b75450d | 1215 | goto put_inode_out; |
82cae269 | 1216 | } |
318d016e | 1217 | |
82cae269 | 1218 | bytes = inode->i_size; |
59bfd7a4 | 1219 | sbi->def_table = t = kmalloc(bytes, GFP_NOFS | __GFP_NOWARN); |
82cae269 KK |
1220 | if (!t) { |
1221 | err = -ENOMEM; | |
9b75450d | 1222 | goto put_inode_out; |
82cae269 KK |
1223 | } |
1224 | ||
1225 | for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) { | |
1226 | unsigned long tail = bytes - done; | |
1227 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1228 | ||
1229 | if (IS_ERR(page)) { | |
1230 | err = PTR_ERR(page); | |
e43f6ec2 | 1231 | ntfs_err(sb, "Failed to read $AttrDef (%d).", err); |
9b75450d | 1232 | goto put_inode_out; |
82cae269 KK |
1233 | } |
1234 | memcpy(Add2Ptr(t, done), page_address(page), | |
1235 | min(PAGE_SIZE, tail)); | |
1236 | ntfs_unmap_page(page); | |
1237 | ||
1238 | if (!idx && ATTR_STD != t->type) { | |
e43f6ec2 | 1239 | ntfs_err(sb, "$AttrDef is corrupted."); |
82cae269 | 1240 | err = -EINVAL; |
9b75450d | 1241 | goto put_inode_out; |
82cae269 KK |
1242 | } |
1243 | } | |
1244 | ||
1245 | t += 1; | |
1246 | sbi->def_entries = 1; | |
1247 | done = sizeof(struct ATTR_DEF_ENTRY); | |
1248 | sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE; | |
f8d87ed9 | 1249 | sbi->ea_max_size = 0x10000; /* default formatter value */ |
82cae269 KK |
1250 | |
1251 | while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { | |
1252 | u32 t32 = le32_to_cpu(t->type); | |
1253 | u64 sz = le64_to_cpu(t->max_sz); | |
1254 | ||
1255 | if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) | |
1256 | break; | |
1257 | ||
1258 | if (t->type == ATTR_REPARSE) | |
1259 | sbi->reparse.max_size = sz; | |
1260 | else if (t->type == ATTR_EA) | |
1261 | sbi->ea_max_size = sz; | |
1262 | ||
1263 | done += sizeof(struct ATTR_DEF_ENTRY); | |
1264 | t += 1; | |
1265 | sbi->def_entries += 1; | |
1266 | } | |
1267 | iput(inode); | |
1268 | ||
e8b8e97f | 1269 | /* Load $UpCase. */ |
82cae269 KK |
1270 | ref.low = cpu_to_le32(MFT_REC_UPCASE); |
1271 | ref.seq = cpu_to_le16(MFT_REC_UPCASE); | |
1272 | inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); | |
1273 | if (IS_ERR(inode)) { | |
9b75450d | 1274 | err = PTR_ERR(inode); |
e43f6ec2 | 1275 | ntfs_err(sb, "Failed to load $UpCase (%d).", err); |
9b75450d | 1276 | goto out; |
82cae269 KK |
1277 | } |
1278 | ||
82cae269 KK |
1279 | if (inode->i_size != 0x10000 * sizeof(short)) { |
1280 | err = -EINVAL; | |
e43f6ec2 | 1281 | ntfs_err(sb, "$UpCase is corrupted."); |
9b75450d | 1282 | goto put_inode_out; |
82cae269 KK |
1283 | } |
1284 | ||
82cae269 KK |
1285 | for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) { |
1286 | const __le16 *src; | |
0056b273 | 1287 | u16 *dst = Add2Ptr(sbi->upcase, idx << PAGE_SHIFT); |
82cae269 KK |
1288 | struct page *page = ntfs_map_page(inode->i_mapping, idx); |
1289 | ||
1290 | if (IS_ERR(page)) { | |
1291 | err = PTR_ERR(page); | |
e43f6ec2 | 1292 | ntfs_err(sb, "Failed to read $UpCase (%d).", err); |
9b75450d | 1293 | goto put_inode_out; |
82cae269 KK |
1294 | } |
1295 | ||
1296 | src = page_address(page); | |
1297 | ||
1298 | #ifdef __BIG_ENDIAN | |
1299 | for (i = 0; i < PAGE_SIZE / sizeof(u16); i++) | |
1300 | *dst++ = le16_to_cpu(*src++); | |
1301 | #else | |
1302 | memcpy(dst, src, PAGE_SIZE); | |
1303 | #endif | |
1304 | ntfs_unmap_page(page); | |
1305 | } | |
1306 | ||
0056b273 KA |
1307 | shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); |
1308 | if (shared && sbi->upcase != shared) { | |
1309 | kvfree(sbi->upcase); | |
82cae269 | 1310 | sbi->upcase = shared; |
82cae269 KK |
1311 | } |
1312 | ||
1313 | iput(inode); | |
82cae269 KK |
1314 | |
1315 | if (is_ntfs3(sbi)) { | |
e8b8e97f | 1316 | /* Load $Secure. */ |
82cae269 | 1317 | err = ntfs_security_init(sbi); |
e43f6ec2 KK |
1318 | if (err) { |
1319 | ntfs_err(sb, "Failed to initialize $Secure (%d).", err); | |
9b75450d | 1320 | goto out; |
e43f6ec2 | 1321 | } |
82cae269 | 1322 | |
e8b8e97f | 1323 | /* Load $Extend. */ |
82cae269 | 1324 | err = ntfs_extend_init(sbi); |
e43f6ec2 KK |
1325 | if (err) { |
1326 | ntfs_warn(sb, "Failed to initialize $Extend."); | |
82cae269 | 1327 | goto load_root; |
e43f6ec2 | 1328 | } |
82cae269 | 1329 | |
e43f6ec2 | 1330 | /* Load $Extend/$Reparse. */ |
82cae269 | 1331 | err = ntfs_reparse_init(sbi); |
e43f6ec2 KK |
1332 | if (err) { |
1333 | ntfs_warn(sb, "Failed to initialize $Extend/$Reparse."); | |
82cae269 | 1334 | goto load_root; |
e43f6ec2 | 1335 | } |
82cae269 | 1336 | |
e43f6ec2 | 1337 | /* Load $Extend/$ObjId. */ |
82cae269 | 1338 | err = ntfs_objid_init(sbi); |
e43f6ec2 KK |
1339 | if (err) { |
1340 | ntfs_warn(sb, "Failed to initialize $Extend/$ObjId."); | |
82cae269 | 1341 | goto load_root; |
e43f6ec2 | 1342 | } |
82cae269 KK |
1343 | } |
1344 | ||
1345 | load_root: | |
e8b8e97f | 1346 | /* Load root. */ |
82cae269 KK |
1347 | ref.low = cpu_to_le32(MFT_REC_ROOT); |
1348 | ref.seq = cpu_to_le16(MFT_REC_ROOT); | |
1349 | inode = ntfs_iget5(sb, &ref, &NAME_ROOT); | |
788ee160 | 1350 | if (IS_ERR(inode)) { |
e43f6ec2 KK |
1351 | err = PTR_ERR(inode); |
1352 | ntfs_err(sb, "Failed to load root (%d).", err); | |
9b75450d | 1353 | goto out; |
82cae269 KK |
1354 | } |
1355 | ||
788ee160 KK |
1356 | /* |
1357 | * Final check. Looks like this case should never occurs. | |
1358 | */ | |
1359 | if (!inode->i_op) { | |
1360 | err = -EINVAL; | |
1361 | ntfs_err(sb, "Failed to load root (%d).", err); | |
1362 | goto put_inode_out; | |
1363 | } | |
1364 | ||
82cae269 | 1365 | sb->s_root = d_make_root(inode); |
9b75450d KK |
1366 | if (!sb->s_root) { |
1367 | err = -ENOMEM; | |
1368 | goto put_inode_out; | |
1369 | } | |
82cae269 KK |
1370 | |
1371 | return 0; | |
9b75450d KK |
1372 | |
1373 | put_inode_out: | |
82cae269 | 1374 | iput(inode); |
9b75450d KK |
1375 | out: |
1376 | /* | |
1377 | * Free resources here. | |
1378 | * ntfs_fs_free will be called with fc->s_fs_info = NULL | |
1379 | */ | |
51e76a23 | 1380 | put_mount_options(sbi->options); |
9b75450d KK |
1381 | put_ntfs(sbi); |
1382 | sb->s_fs_info = NULL; | |
1383 | ||
82cae269 KK |
1384 | return err; |
1385 | } | |
1386 | ||
1387 | void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) | |
1388 | { | |
1389 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1390 | struct block_device *bdev = sb->s_bdev; | |
1391 | sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; | |
1392 | unsigned long blocks = (u64)len * sbi->blocks_per_cluster; | |
1393 | unsigned long cnt = 0; | |
1394 | unsigned long limit = global_zone_page_state(NR_FREE_PAGES) | |
1395 | << (PAGE_SHIFT - sb->s_blocksize_bits); | |
1396 | ||
1397 | if (limit >= 0x2000) | |
1398 | limit -= 0x1000; | |
1399 | else if (limit < 32) | |
1400 | limit = 32; | |
1401 | else | |
1402 | limit >>= 1; | |
1403 | ||
1404 | while (blocks--) { | |
1405 | clean_bdev_aliases(bdev, devblock++, 1); | |
1406 | if (cnt++ >= limit) { | |
1407 | sync_blockdev(bdev); | |
1408 | cnt = 0; | |
1409 | } | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | /* | |
e8b8e97f | 1414 | * ntfs_discard - Issue a discard request (trim for SSD). |
82cae269 KK |
1415 | */ |
1416 | int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) | |
1417 | { | |
1418 | int err; | |
1419 | u64 lbo, bytes, start, end; | |
1420 | struct super_block *sb; | |
1421 | ||
1422 | if (sbi->used.next_free_lcn == lcn + len) | |
1423 | sbi->used.next_free_lcn = lcn; | |
1424 | ||
1425 | if (sbi->flags & NTFS_FLAGS_NODISCARD) | |
1426 | return -EOPNOTSUPP; | |
1427 | ||
564c97bd | 1428 | if (!sbi->options->discard) |
82cae269 KK |
1429 | return -EOPNOTSUPP; |
1430 | ||
1431 | lbo = (u64)lcn << sbi->cluster_bits; | |
1432 | bytes = (u64)len << sbi->cluster_bits; | |
1433 | ||
e8b8e97f | 1434 | /* Align up 'start' on discard_granularity. */ |
82cae269 KK |
1435 | start = (lbo + sbi->discard_granularity - 1) & |
1436 | sbi->discard_granularity_mask_inv; | |
e8b8e97f | 1437 | /* Align down 'end' on discard_granularity. */ |
82cae269 KK |
1438 | end = (lbo + bytes) & sbi->discard_granularity_mask_inv; |
1439 | ||
1440 | sb = sbi->sb; | |
1441 | if (start >= end) | |
1442 | return 0; | |
1443 | ||
1444 | err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, | |
44abff2c | 1445 | GFP_NOFS); |
82cae269 KK |
1446 | |
1447 | if (err == -EOPNOTSUPP) | |
1448 | sbi->flags |= NTFS_FLAGS_NODISCARD; | |
1449 | ||
1450 | return err; | |
1451 | } | |
1452 | ||
610f8f5a KA |
1453 | static int ntfs_fs_get_tree(struct fs_context *fc) |
1454 | { | |
1455 | return get_tree_bdev(fc, ntfs_fill_super); | |
1456 | } | |
1457 | ||
1458 | /* | |
1459 | * ntfs_fs_free - Free fs_context. | |
1460 | * | |
1461 | * Note that this will be called after fill_super and reconfigure | |
1462 | * even when they pass. So they have to take pointers if they pass. | |
1463 | */ | |
1464 | static void ntfs_fs_free(struct fs_context *fc) | |
1465 | { | |
1466 | struct ntfs_mount_options *opts = fc->fs_private; | |
1467 | struct ntfs_sb_info *sbi = fc->s_fs_info; | |
1468 | ||
1469 | if (sbi) | |
1470 | put_ntfs(sbi); | |
1471 | ||
1472 | if (opts) | |
1473 | put_mount_options(opts); | |
1474 | } | |
1475 | ||
1476 | static const struct fs_context_operations ntfs_context_ops = { | |
1477 | .parse_param = ntfs_fs_parse_param, | |
1478 | .get_tree = ntfs_fs_get_tree, | |
1479 | .reconfigure = ntfs_fs_reconfigure, | |
1480 | .free = ntfs_fs_free, | |
1481 | }; | |
1482 | ||
1483 | /* | |
96de65a9 | 1484 | * ntfs_init_fs_context - Initialize sbi and opts |
610f8f5a | 1485 | * |
6700eabb | 1486 | * This will called when mount/remount. We will first initialize |
610f8f5a KA |
1487 | * options so that if remount we can use just that. |
1488 | */ | |
1489 | static int ntfs_init_fs_context(struct fs_context *fc) | |
82cae269 | 1490 | { |
610f8f5a KA |
1491 | struct ntfs_mount_options *opts; |
1492 | struct ntfs_sb_info *sbi; | |
1493 | ||
1494 | opts = kzalloc(sizeof(struct ntfs_mount_options), GFP_NOFS); | |
1495 | if (!opts) | |
1496 | return -ENOMEM; | |
1497 | ||
1498 | /* Default options. */ | |
1499 | opts->fs_uid = current_uid(); | |
1500 | opts->fs_gid = current_gid(); | |
1501 | opts->fs_fmask_inv = ~current_umask(); | |
1502 | opts->fs_dmask_inv = ~current_umask(); | |
1503 | ||
1504 | if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) | |
1505 | goto ok; | |
1506 | ||
1507 | sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS); | |
27fac777 KA |
1508 | if (!sbi) |
1509 | goto free_opts; | |
1510 | ||
1511 | sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL); | |
1512 | if (!sbi->upcase) | |
1513 | goto free_sbi; | |
1514 | ||
1515 | ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, | |
1516 | DEFAULT_RATELIMIT_BURST); | |
1517 | ||
1518 | mutex_init(&sbi->compress.mtx_lznt); | |
1519 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1520 | mutex_init(&sbi->compress.mtx_xpress); | |
1521 | mutex_init(&sbi->compress.mtx_lzx); | |
1522 | #endif | |
610f8f5a | 1523 | |
610f8f5a KA |
1524 | fc->s_fs_info = sbi; |
1525 | ok: | |
1526 | fc->fs_private = opts; | |
1527 | fc->ops = &ntfs_context_ops; | |
1528 | ||
1529 | return 0; | |
27fac777 KA |
1530 | free_sbi: |
1531 | kfree(sbi); | |
880301bb CIK |
1532 | free_opts: |
1533 | kfree(opts); | |
27fac777 | 1534 | return -ENOMEM; |
82cae269 KK |
1535 | } |
1536 | ||
1537 | // clang-format off | |
1538 | static struct file_system_type ntfs_fs_type = { | |
610f8f5a KA |
1539 | .owner = THIS_MODULE, |
1540 | .name = "ntfs3", | |
1541 | .init_fs_context = ntfs_init_fs_context, | |
1542 | .parameters = ntfs_fs_parameters, | |
1543 | .kill_sb = kill_block_super, | |
1544 | .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, | |
82cae269 KK |
1545 | }; |
1546 | // clang-format on | |
1547 | ||
1548 | static int __init init_ntfs_fs(void) | |
1549 | { | |
1550 | int err; | |
1551 | ||
2e3a51b5 | 1552 | pr_info("ntfs3: Max link count %u\n", NTFS_LINK_MAX); |
82cae269 | 1553 | |
2e3a51b5 KA |
1554 | if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL)) |
1555 | pr_info("ntfs3: Enabled Linux POSIX ACLs support\n"); | |
1556 | if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER)) | |
96de65a9 KK |
1557 | pr_notice( |
1558 | "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n"); | |
2e3a51b5 KA |
1559 | if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS)) |
1560 | pr_info("ntfs3: Read-only LZX/Xpress compression included\n"); | |
82cae269 KK |
1561 | |
1562 | err = ntfs3_init_bitmap(); | |
1563 | if (err) | |
1564 | return err; | |
1565 | ||
1566 | ntfs_inode_cachep = kmem_cache_create( | |
1567 | "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, | |
1568 | (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT), | |
1569 | init_once); | |
1570 | if (!ntfs_inode_cachep) { | |
1571 | err = -ENOMEM; | |
1572 | goto out1; | |
1573 | } | |
1574 | ||
1575 | err = register_filesystem(&ntfs_fs_type); | |
1576 | if (err) | |
1577 | goto out; | |
1578 | ||
1579 | return 0; | |
1580 | out: | |
1581 | kmem_cache_destroy(ntfs_inode_cachep); | |
1582 | out1: | |
1583 | ntfs3_exit_bitmap(); | |
1584 | return err; | |
1585 | } | |
1586 | ||
1587 | static void __exit exit_ntfs_fs(void) | |
1588 | { | |
ae6b47b5 KK |
1589 | rcu_barrier(); |
1590 | kmem_cache_destroy(ntfs_inode_cachep); | |
82cae269 KK |
1591 | unregister_filesystem(&ntfs_fs_type); |
1592 | ntfs3_exit_bitmap(); | |
1593 | } | |
1594 | ||
1595 | MODULE_LICENSE("GPL"); | |
1596 | MODULE_DESCRIPTION("ntfs3 read/write filesystem"); | |
82cae269 KK |
1597 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL |
1598 | MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); | |
1599 | #endif | |
1600 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
96de65a9 KK |
1601 | MODULE_INFO( |
1602 | cluster, | |
1603 | "Warning: Activated 64 bits per cluster. Windows does not support this"); | |
82cae269 KK |
1604 | #endif |
1605 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1606 | MODULE_INFO(compression, "Read-only lzx/xpress compression included"); | |
1607 | #endif | |
1608 | ||
1609 | MODULE_AUTHOR("Konstantin Komarov"); | |
1610 | MODULE_ALIAS_FS("ntfs3"); | |
1611 | ||
1612 | module_init(init_ntfs_fs); | |
1613 | module_exit(exit_ntfs_fs); |