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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> | |
7832e123 | 60 | #include <linux/proc_fs.h> |
82cae269 KK |
61 | #include <linux/seq_file.h> |
62 | #include <linux/statfs.h> | |
63 | ||
64 | #include "debug.h" | |
65 | #include "ntfs.h" | |
66 | #include "ntfs_fs.h" | |
67 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
68 | #include "lib/lib.h" | |
69 | #endif | |
70 | ||
71 | #ifdef CONFIG_PRINTK | |
72 | /* | |
e8b8e97f KA |
73 | * ntfs_printk - Trace warnings/notices/errors. |
74 | * | |
82cae269 KK |
75 | * Thanks Joe Perches <joe@perches.com> for implementation |
76 | */ | |
77 | void ntfs_printk(const struct super_block *sb, const char *fmt, ...) | |
78 | { | |
79 | struct va_format vaf; | |
80 | va_list args; | |
81 | int level; | |
82 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
83 | ||
e8b8e97f | 84 | /* Should we use different ratelimits for warnings/notices/errors? */ |
82cae269 KK |
85 | if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) |
86 | return; | |
87 | ||
88 | va_start(args, fmt); | |
89 | ||
90 | level = printk_get_level(fmt); | |
91 | vaf.fmt = printk_skip_level(fmt); | |
92 | vaf.va = &args; | |
93 | printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); | |
94 | ||
95 | va_end(args); | |
96 | } | |
97 | ||
98 | static char s_name_buf[512]; | |
e8b8e97f | 99 | static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'. |
82cae269 | 100 | |
e8b8e97f KA |
101 | /* |
102 | * ntfs_inode_printk | |
103 | * | |
104 | * Print warnings/notices/errors about inode using name or inode number. | |
105 | */ | |
82cae269 KK |
106 | void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) |
107 | { | |
108 | struct super_block *sb = inode->i_sb; | |
109 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
110 | char *name; | |
111 | va_list args; | |
112 | struct va_format vaf; | |
113 | int level; | |
114 | ||
115 | if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3")) | |
116 | return; | |
117 | ||
e8b8e97f | 118 | /* Use static allocated buffer, if possible. */ |
96de65a9 | 119 | name = atomic_dec_and_test(&s_name_buf_cnt) ? |
f0377761 KK |
120 | s_name_buf : |
121 | kmalloc(sizeof(s_name_buf), GFP_NOFS); | |
82cae269 KK |
122 | |
123 | if (name) { | |
124 | struct dentry *de = d_find_alias(inode); | |
82cae269 KK |
125 | |
126 | if (de) { | |
127 | spin_lock(&de->d_lock); | |
622cd3da CJ |
128 | snprintf(name, sizeof(s_name_buf), " \"%s\"", |
129 | de->d_name.name); | |
82cae269 | 130 | spin_unlock(&de->d_lock); |
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 | ||
f0377761 | 260 | // clang-format off |
610f8f5a KA |
261 | static const struct fs_parameter_spec ntfs_fs_parameters[] = { |
262 | fsparam_u32("uid", Opt_uid), | |
263 | fsparam_u32("gid", Opt_gid), | |
264 | fsparam_u32oct("umask", Opt_umask), | |
265 | fsparam_u32oct("dmask", Opt_dmask), | |
266 | fsparam_u32oct("fmask", Opt_fmask), | |
267 | fsparam_flag_no("sys_immutable", Opt_immutable), | |
268 | fsparam_flag_no("discard", Opt_discard), | |
269 | fsparam_flag_no("force", Opt_force), | |
270 | fsparam_flag_no("sparse", Opt_sparse), | |
9d1939f4 | 271 | fsparam_flag_no("hidden", Opt_nohidden), |
dc0fcc99 | 272 | fsparam_flag_no("hide_dot_files", Opt_hide_dot_files), |
1d07a9df | 273 | fsparam_flag_no("windows_names", Opt_windows_names), |
610f8f5a | 274 | fsparam_flag_no("showmeta", Opt_showmeta), |
16b3dbfb KK |
275 | fsparam_flag_no("acl", Opt_acl), |
276 | fsparam_string("iocharset", Opt_iocharset), | |
610f8f5a | 277 | fsparam_flag_no("prealloc", Opt_prealloc), |
a3a956c7 | 278 | fsparam_flag_no("nocase", Opt_nocase), |
610f8f5a | 279 | {} |
82cae269 | 280 | }; |
f0377761 | 281 | // clang-format on |
82cae269 | 282 | |
610f8f5a KA |
283 | /* |
284 | * Load nls table or if @nls is utf8 then return NULL. | |
f0377761 KK |
285 | * |
286 | * It is good idea to use here "const char *nls". | |
287 | * But load_nls accepts "char*". | |
610f8f5a KA |
288 | */ |
289 | static struct nls_table *ntfs_load_nls(char *nls) | |
82cae269 | 290 | { |
610f8f5a | 291 | struct nls_table *ret; |
82cae269 | 292 | |
610f8f5a KA |
293 | if (!nls) |
294 | nls = CONFIG_NLS_DEFAULT; | |
82cae269 | 295 | |
610f8f5a KA |
296 | if (strcmp(nls, "utf8") == 0) |
297 | return NULL; | |
82cae269 | 298 | |
610f8f5a KA |
299 | if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0) |
300 | return load_nls_default(); | |
82cae269 | 301 | |
610f8f5a KA |
302 | ret = load_nls(nls); |
303 | if (ret) | |
304 | return ret; | |
82cae269 | 305 | |
610f8f5a KA |
306 | return ERR_PTR(-EINVAL); |
307 | } | |
308 | ||
309 | static int ntfs_fs_parse_param(struct fs_context *fc, | |
310 | struct fs_parameter *param) | |
311 | { | |
312 | struct ntfs_mount_options *opts = fc->fs_private; | |
313 | struct fs_parse_result result; | |
314 | int opt; | |
315 | ||
316 | opt = fs_parse(fc, ntfs_fs_parameters, param, &result); | |
317 | if (opt < 0) | |
318 | return opt; | |
319 | ||
320 | switch (opt) { | |
321 | case Opt_uid: | |
322 | opts->fs_uid = make_kuid(current_user_ns(), result.uint_32); | |
323 | if (!uid_valid(opts->fs_uid)) | |
324 | return invalf(fc, "ntfs3: Invalid value for uid."); | |
610f8f5a KA |
325 | break; |
326 | case Opt_gid: | |
327 | opts->fs_gid = make_kgid(current_user_ns(), result.uint_32); | |
328 | if (!gid_valid(opts->fs_gid)) | |
329 | return invalf(fc, "ntfs3: Invalid value for gid."); | |
610f8f5a KA |
330 | break; |
331 | case Opt_umask: | |
332 | if (result.uint_32 & ~07777) | |
333 | return invalf(fc, "ntfs3: Invalid value for umask."); | |
334 | opts->fs_fmask_inv = ~result.uint_32; | |
335 | opts->fs_dmask_inv = ~result.uint_32; | |
336 | opts->fmask = 1; | |
337 | opts->dmask = 1; | |
338 | break; | |
339 | case Opt_dmask: | |
340 | if (result.uint_32 & ~07777) | |
341 | return invalf(fc, "ntfs3: Invalid value for dmask."); | |
342 | opts->fs_dmask_inv = ~result.uint_32; | |
343 | opts->dmask = 1; | |
344 | break; | |
345 | case Opt_fmask: | |
346 | if (result.uint_32 & ~07777) | |
347 | return invalf(fc, "ntfs3: Invalid value for fmask."); | |
348 | opts->fs_fmask_inv = ~result.uint_32; | |
349 | opts->fmask = 1; | |
350 | break; | |
351 | case Opt_immutable: | |
352 | opts->sys_immutable = result.negated ? 0 : 1; | |
353 | break; | |
354 | case Opt_discard: | |
355 | opts->discard = result.negated ? 0 : 1; | |
356 | break; | |
357 | case Opt_force: | |
358 | opts->force = result.negated ? 0 : 1; | |
359 | break; | |
360 | case Opt_sparse: | |
361 | opts->sparse = result.negated ? 0 : 1; | |
362 | break; | |
363 | case Opt_nohidden: | |
9d1939f4 | 364 | opts->nohidden = result.negated ? 1 : 0; |
610f8f5a | 365 | break; |
098250db | 366 | case Opt_hide_dot_files: |
4c9ba192 | 367 | opts->hide_dot_files = result.negated ? 0 : 1; |
098250db | 368 | break; |
1d07a9df DP |
369 | case Opt_windows_names: |
370 | opts->windows_names = result.negated ? 0 : 1; | |
371 | break; | |
16b3dbfb KK |
372 | case Opt_showmeta: |
373 | opts->showmeta = result.negated ? 0 : 1; | |
374 | break; | |
610f8f5a KA |
375 | case Opt_acl: |
376 | if (!result.negated) | |
82cae269 | 377 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL |
610f8f5a | 378 | fc->sb_flags |= SB_POSIXACL; |
82cae269 | 379 | #else |
96de65a9 KK |
380 | return invalf( |
381 | fc, "ntfs3: Support for ACL not compiled in!"); | |
82cae269 | 382 | #endif |
610f8f5a KA |
383 | else |
384 | fc->sb_flags &= ~SB_POSIXACL; | |
385 | break; | |
e274cde8 | 386 | case Opt_iocharset: |
610f8f5a KA |
387 | kfree(opts->nls_name); |
388 | opts->nls_name = param->string; | |
389 | param->string = NULL; | |
390 | break; | |
391 | case Opt_prealloc: | |
392 | opts->prealloc = result.negated ? 0 : 1; | |
393 | break; | |
a3a956c7 KK |
394 | case Opt_nocase: |
395 | opts->nocase = result.negated ? 1 : 0; | |
396 | break; | |
610f8f5a KA |
397 | default: |
398 | /* Should not be here unless we forget add case. */ | |
399 | return -EINVAL; | |
82cae269 | 400 | } |
82cae269 KK |
401 | return 0; |
402 | } | |
403 | ||
610f8f5a | 404 | static int ntfs_fs_reconfigure(struct fs_context *fc) |
82cae269 | 405 | { |
610f8f5a | 406 | struct super_block *sb = fc->root->d_sb; |
82cae269 | 407 | struct ntfs_sb_info *sbi = sb->s_fs_info; |
610f8f5a KA |
408 | struct ntfs_mount_options *new_opts = fc->fs_private; |
409 | int ro_rw; | |
82cae269 | 410 | |
610f8f5a | 411 | ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY); |
82cae269 | 412 | if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { |
96de65a9 KK |
413 | errorf(fc, |
414 | "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); | |
610f8f5a KA |
415 | return -EINVAL; |
416 | } | |
417 | ||
418 | new_opts->nls = ntfs_load_nls(new_opts->nls_name); | |
419 | if (IS_ERR(new_opts->nls)) { | |
420 | new_opts->nls = NULL; | |
96de65a9 KK |
421 | errorf(fc, "ntfs3: Cannot load iocharset %s", |
422 | new_opts->nls_name); | |
610f8f5a | 423 | return -EINVAL; |
82cae269 | 424 | } |
610f8f5a | 425 | if (new_opts->nls != sbi->options->nls) |
96de65a9 KK |
426 | return invalf( |
427 | fc, | |
428 | "ntfs3: Cannot use different iocharset when remounting!"); | |
82cae269 KK |
429 | |
430 | sync_filesystem(sb); | |
431 | ||
432 | if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && | |
610f8f5a | 433 | !new_opts->force) { |
96de65a9 KK |
434 | errorf(fc, |
435 | "ntfs3: Volume is dirty and \"force\" flag is not set!"); | |
610f8f5a | 436 | return -EINVAL; |
82cae269 KK |
437 | } |
438 | ||
cd39981f | 439 | swap(sbi->options, fc->fs_private); |
82cae269 | 440 | |
610f8f5a | 441 | return 0; |
82cae269 KK |
442 | } |
443 | ||
7832e123 KK |
444 | #ifdef CONFIG_PROC_FS |
445 | static struct proc_dir_entry *proc_info_root; | |
446 | ||
447 | /* | |
448 | * ntfs3_volinfo: | |
449 | * | |
450 | * The content of /proc/fs/ntfs3/<dev>/volinfo | |
451 | * | |
452 | * ntfs3.1 | |
453 | * cluster size | |
454 | * number of clusters | |
d27e202b KK |
455 | * total number of mft records |
456 | * number of used mft records ~= number of files + folders | |
457 | * real state of ntfs "dirty"/"clean" | |
458 | * current state of ntfs "dirty"/"clean" | |
7832e123 KK |
459 | */ |
460 | static int ntfs3_volinfo(struct seq_file *m, void *o) | |
461 | { | |
462 | struct super_block *sb = m->private; | |
463 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
464 | ||
d27e202b KK |
465 | seq_printf(m, "ntfs%d.%d\n%u\n%zu\n\%zu\n%zu\n%s\n%s\n", |
466 | sbi->volume.major_ver, sbi->volume.minor_ver, | |
467 | sbi->cluster_size, sbi->used.bitmap.nbits, | |
468 | sbi->mft.bitmap.nbits, | |
469 | sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap), | |
470 | sbi->volume.real_dirty ? "dirty" : "clean", | |
471 | (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean"); | |
7832e123 KK |
472 | |
473 | return 0; | |
474 | } | |
475 | ||
476 | static int ntfs3_volinfo_open(struct inode *inode, struct file *file) | |
477 | { | |
478 | return single_open(file, ntfs3_volinfo, pde_data(inode)); | |
479 | } | |
480 | ||
481 | /* read /proc/fs/ntfs3/<dev>/label */ | |
482 | static int ntfs3_label_show(struct seq_file *m, void *o) | |
483 | { | |
484 | struct super_block *sb = m->private; | |
485 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
486 | ||
487 | seq_printf(m, "%s\n", sbi->volume.label); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | /* write /proc/fs/ntfs3/<dev>/label */ | |
493 | static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer, | |
494 | size_t count, loff_t *ppos) | |
495 | { | |
496 | int err; | |
497 | struct super_block *sb = pde_data(file_inode(file)); | |
7832e123 | 498 | ssize_t ret = count; |
e52dce61 KK |
499 | u8 *label; |
500 | ||
501 | if (sb_rdonly(sb)) | |
502 | return -EROFS; | |
503 | ||
504 | label = kmalloc(count, GFP_NOFS); | |
7832e123 KK |
505 | |
506 | if (!label) | |
507 | return -ENOMEM; | |
508 | ||
509 | if (copy_from_user(label, buffer, ret)) { | |
510 | ret = -EFAULT; | |
511 | goto out; | |
512 | } | |
513 | while (ret > 0 && label[ret - 1] == '\n') | |
514 | ret -= 1; | |
515 | ||
f684073c | 516 | err = ntfs_set_label(sb->s_fs_info, label, ret); |
7832e123 KK |
517 | |
518 | if (err < 0) { | |
519 | ntfs_err(sb, "failed (%d) to write label", err); | |
520 | ret = err; | |
521 | goto out; | |
522 | } | |
523 | ||
524 | *ppos += count; | |
525 | ret = count; | |
526 | out: | |
527 | kfree(label); | |
528 | return ret; | |
529 | } | |
530 | ||
531 | static int ntfs3_label_open(struct inode *inode, struct file *file) | |
532 | { | |
533 | return single_open(file, ntfs3_label_show, pde_data(inode)); | |
534 | } | |
535 | ||
536 | static const struct proc_ops ntfs3_volinfo_fops = { | |
537 | .proc_read = seq_read, | |
538 | .proc_lseek = seq_lseek, | |
539 | .proc_release = single_release, | |
540 | .proc_open = ntfs3_volinfo_open, | |
541 | }; | |
542 | ||
543 | static const struct proc_ops ntfs3_label_fops = { | |
544 | .proc_read = seq_read, | |
545 | .proc_lseek = seq_lseek, | |
546 | .proc_release = single_release, | |
547 | .proc_open = ntfs3_label_open, | |
548 | .proc_write = ntfs3_label_write, | |
549 | }; | |
550 | ||
551 | #endif | |
552 | ||
82cae269 KK |
553 | static struct kmem_cache *ntfs_inode_cachep; |
554 | ||
555 | static struct inode *ntfs_alloc_inode(struct super_block *sb) | |
556 | { | |
fd60b288 | 557 | struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS); |
82cae269 KK |
558 | |
559 | if (!ni) | |
560 | return NULL; | |
561 | ||
562 | memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode)); | |
82cae269 | 563 | mutex_init(&ni->ni_lock); |
82cae269 KK |
564 | return &ni->vfs_inode; |
565 | } | |
566 | ||
ae6b47b5 | 567 | static void ntfs_free_inode(struct inode *inode) |
82cae269 | 568 | { |
82cae269 KK |
569 | struct ntfs_inode *ni = ntfs_i(inode); |
570 | ||
571 | mutex_destroy(&ni->ni_lock); | |
82cae269 KK |
572 | kmem_cache_free(ntfs_inode_cachep, ni); |
573 | } | |
574 | ||
82cae269 KK |
575 | static void init_once(void *foo) |
576 | { | |
577 | struct ntfs_inode *ni = foo; | |
578 | ||
579 | inode_init_once(&ni->vfs_inode); | |
580 | } | |
581 | ||
e8b8e97f | 582 | /* |
126dbf8a | 583 | * Noinline to reduce binary size. |
e8b8e97f | 584 | */ |
78a06688 | 585 | static noinline void ntfs3_put_sbi(struct ntfs_sb_info *sbi) |
82cae269 | 586 | { |
82cae269 KK |
587 | wnd_close(&sbi->mft.bitmap); |
588 | wnd_close(&sbi->used.bitmap); | |
589 | ||
4ad5c924 | 590 | if (sbi->mft.ni) { |
82cae269 | 591 | iput(&sbi->mft.ni->vfs_inode); |
4ad5c924 KK |
592 | sbi->mft.ni = NULL; |
593 | } | |
82cae269 | 594 | |
4ad5c924 | 595 | if (sbi->security.ni) { |
82cae269 | 596 | iput(&sbi->security.ni->vfs_inode); |
4ad5c924 KK |
597 | sbi->security.ni = NULL; |
598 | } | |
82cae269 | 599 | |
4ad5c924 | 600 | if (sbi->reparse.ni) { |
82cae269 | 601 | iput(&sbi->reparse.ni->vfs_inode); |
4ad5c924 KK |
602 | sbi->reparse.ni = NULL; |
603 | } | |
82cae269 | 604 | |
4ad5c924 | 605 | if (sbi->objid.ni) { |
82cae269 | 606 | iput(&sbi->objid.ni->vfs_inode); |
4ad5c924 KK |
607 | sbi->objid.ni = NULL; |
608 | } | |
82cae269 | 609 | |
4ad5c924 | 610 | if (sbi->volume.ni) { |
82cae269 | 611 | iput(&sbi->volume.ni->vfs_inode); |
4ad5c924 KK |
612 | sbi->volume.ni = NULL; |
613 | } | |
82cae269 KK |
614 | |
615 | ntfs_update_mftmirr(sbi, 0); | |
616 | ||
617 | indx_clear(&sbi->security.index_sii); | |
618 | indx_clear(&sbi->security.index_sdh); | |
619 | indx_clear(&sbi->reparse.index_r); | |
620 | indx_clear(&sbi->objid.index_o); | |
78a06688 CB |
621 | } |
622 | ||
623 | static void ntfs3_free_sbi(struct ntfs_sb_info *sbi) | |
624 | { | |
625 | kfree(sbi->new_rec); | |
626 | kvfree(ntfs_put_shared(sbi->upcase)); | |
ddb17dc8 | 627 | kvfree(sbi->def_table); |
195c52bd | 628 | kfree(sbi->compress.lznt); |
82cae269 KK |
629 | #ifdef CONFIG_NTFS3_LZX_XPRESS |
630 | xpress_free_decompressor(sbi->compress.xpress); | |
631 | lzx_free_decompressor(sbi->compress.lzx); | |
632 | #endif | |
195c52bd | 633 | kfree(sbi); |
82cae269 KK |
634 | } |
635 | ||
636 | static void ntfs_put_super(struct super_block *sb) | |
637 | { | |
638 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
639 | ||
7832e123 KK |
640 | #ifdef CONFIG_PROC_FS |
641 | // Remove /proc/fs/ntfs3/.. | |
642 | if (sbi->procdir) { | |
643 | remove_proc_entry("label", sbi->procdir); | |
644 | remove_proc_entry("volinfo", sbi->procdir); | |
645 | remove_proc_entry(sb->s_id, proc_info_root); | |
646 | sbi->procdir = NULL; | |
647 | } | |
648 | #endif | |
649 | ||
e8b8e97f | 650 | /* Mark rw ntfs as clear, if possible. */ |
82cae269 | 651 | ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); |
78a06688 | 652 | ntfs3_put_sbi(sbi); |
82cae269 KK |
653 | } |
654 | ||
655 | static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
656 | { | |
657 | struct super_block *sb = dentry->d_sb; | |
658 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
659 | struct wnd_bitmap *wnd = &sbi->used.bitmap; | |
660 | ||
661 | buf->f_type = sb->s_magic; | |
662 | buf->f_bsize = sbi->cluster_size; | |
663 | buf->f_blocks = wnd->nbits; | |
664 | ||
665 | buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd); | |
666 | buf->f_fsid.val[0] = sbi->volume.ser_num; | |
667 | buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32); | |
668 | buf->f_namelen = NTFS_NAME_LEN; | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | static int ntfs_show_options(struct seq_file *m, struct dentry *root) | |
674 | { | |
675 | struct super_block *sb = root->d_sb; | |
676 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
564c97bd | 677 | struct ntfs_mount_options *opts = sbi->options; |
82cae269 KK |
678 | struct user_namespace *user_ns = seq_user_ns(m); |
679 | ||
96de65a9 KK |
680 | seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid)); |
681 | seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid)); | |
82cae269 | 682 | if (opts->dmask) |
f27b92ec | 683 | seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff); |
16b3dbfb KK |
684 | if (opts->fmask) |
685 | seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff); | |
82cae269 KK |
686 | if (opts->sys_immutable) |
687 | seq_puts(m, ",sys_immutable"); | |
688 | if (opts->discard) | |
689 | seq_puts(m, ",discard"); | |
16b3dbfb KK |
690 | if (opts->force) |
691 | seq_puts(m, ",force"); | |
82cae269 KK |
692 | if (opts->sparse) |
693 | seq_puts(m, ",sparse"); | |
82cae269 KK |
694 | if (opts->nohidden) |
695 | seq_puts(m, ",nohidden"); | |
19b42450 | 696 | if (opts->hide_dot_files) |
dc0fcc99 | 697 | seq_puts(m, ",hide_dot_files"); |
16b3dbfb KK |
698 | if (opts->windows_names) |
699 | seq_puts(m, ",windows_names"); | |
700 | if (opts->showmeta) | |
701 | seq_puts(m, ",showmeta"); | |
82cae269 KK |
702 | if (sb->s_flags & SB_POSIXACL) |
703 | seq_puts(m, ",acl"); | |
16b3dbfb KK |
704 | if (opts->nls) |
705 | seq_printf(m, ",iocharset=%s", opts->nls->charset); | |
706 | else | |
707 | seq_puts(m, ",iocharset=utf8"); | |
708 | if (opts->prealloc) | |
709 | seq_puts(m, ",prealloc"); | |
710 | if (opts->nocase) | |
711 | seq_puts(m, ",nocase"); | |
82cae269 KK |
712 | |
713 | return 0; | |
714 | } | |
715 | ||
6c3684e7 KK |
716 | /* |
717 | * ntfs_shutdown - super_operations::shutdown | |
718 | */ | |
719 | static void ntfs_shutdown(struct super_block *sb) | |
720 | { | |
97ec56d3 | 721 | set_bit(NTFS_FLAGS_SHUTDOWN_BIT, &ntfs_sb(sb)->flags); |
6c3684e7 KK |
722 | } |
723 | ||
e8b8e97f KA |
724 | /* |
725 | * ntfs_sync_fs - super_operations::sync_fs | |
726 | */ | |
82cae269 KK |
727 | static int ntfs_sync_fs(struct super_block *sb, int wait) |
728 | { | |
729 | int err = 0, err2; | |
730 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
731 | struct ntfs_inode *ni; | |
732 | struct inode *inode; | |
733 | ||
6c3684e7 KK |
734 | if (unlikely(ntfs3_forced_shutdown(sb))) |
735 | return -EIO; | |
736 | ||
82cae269 KK |
737 | ni = sbi->security.ni; |
738 | if (ni) { | |
739 | inode = &ni->vfs_inode; | |
740 | err2 = _ni_write_inode(inode, wait); | |
741 | if (err2 && !err) | |
742 | err = err2; | |
743 | } | |
744 | ||
745 | ni = sbi->objid.ni; | |
746 | if (ni) { | |
747 | inode = &ni->vfs_inode; | |
748 | err2 = _ni_write_inode(inode, wait); | |
749 | if (err2 && !err) | |
750 | err = err2; | |
751 | } | |
752 | ||
753 | ni = sbi->reparse.ni; | |
754 | if (ni) { | |
755 | inode = &ni->vfs_inode; | |
756 | err2 = _ni_write_inode(inode, wait); | |
757 | if (err2 && !err) | |
758 | err = err2; | |
759 | } | |
760 | ||
761 | if (!err) | |
762 | ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); | |
763 | ||
764 | ntfs_update_mftmirr(sbi, wait); | |
765 | ||
766 | return err; | |
767 | } | |
768 | ||
769 | static const struct super_operations ntfs_sops = { | |
770 | .alloc_inode = ntfs_alloc_inode, | |
ae6b47b5 | 771 | .free_inode = ntfs_free_inode, |
82cae269 KK |
772 | .evict_inode = ntfs_evict_inode, |
773 | .put_super = ntfs_put_super, | |
774 | .statfs = ntfs_statfs, | |
775 | .show_options = ntfs_show_options, | |
6c3684e7 | 776 | .shutdown = ntfs_shutdown, |
82cae269 | 777 | .sync_fs = ntfs_sync_fs, |
82cae269 KK |
778 | .write_inode = ntfs3_write_inode, |
779 | }; | |
780 | ||
781 | static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino, | |
782 | u32 generation) | |
783 | { | |
784 | struct MFT_REF ref; | |
785 | struct inode *inode; | |
786 | ||
787 | ref.low = cpu_to_le32(ino); | |
788 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
789 | ref.high = cpu_to_le16(ino >> 32); | |
790 | #else | |
791 | ref.high = 0; | |
792 | #endif | |
793 | ref.seq = cpu_to_le16(generation); | |
794 | ||
795 | inode = ntfs_iget5(sb, &ref, NULL); | |
796 | if (!IS_ERR(inode) && is_bad_inode(inode)) { | |
797 | iput(inode); | |
798 | inode = ERR_PTR(-ESTALE); | |
799 | } | |
800 | ||
801 | return inode; | |
802 | } | |
803 | ||
804 | static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
805 | int fh_len, int fh_type) | |
806 | { | |
807 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
808 | ntfs_export_get_inode); | |
809 | } | |
810 | ||
811 | static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
812 | int fh_len, int fh_type) | |
813 | { | |
814 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
815 | ntfs_export_get_inode); | |
816 | } | |
817 | ||
818 | /* TODO: == ntfs_sync_inode */ | |
819 | static int ntfs_nfs_commit_metadata(struct inode *inode) | |
820 | { | |
821 | return _ni_write_inode(inode, 1); | |
822 | } | |
823 | ||
824 | static const struct export_operations ntfs_export_ops = { | |
e21fc203 | 825 | .encode_fh = generic_encode_ino32_fh, |
82cae269 KK |
826 | .fh_to_dentry = ntfs_fh_to_dentry, |
827 | .fh_to_parent = ntfs_fh_to_parent, | |
828 | .get_parent = ntfs3_get_parent, | |
829 | .commit_metadata = ntfs_nfs_commit_metadata, | |
830 | }; | |
831 | ||
e8b8e97f KA |
832 | /* |
833 | * format_size_gb - Return Gb,Mb to print with "%u.%02u Gb". | |
834 | */ | |
82cae269 KK |
835 | static u32 format_size_gb(const u64 bytes, u32 *mb) |
836 | { | |
e8b8e97f | 837 | /* Do simple right 30 bit shift of 64 bit value. */ |
82cae269 KK |
838 | u64 kbytes = bytes >> 10; |
839 | u32 kbytes32 = kbytes; | |
840 | ||
841 | *mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20; | |
842 | if (*mb >= 100) | |
843 | *mb = 99; | |
844 | ||
845 | return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12); | |
846 | } | |
847 | ||
848 | static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot) | |
849 | { | |
a3b77434 RD |
850 | if (boot->sectors_per_clusters <= 0x80) |
851 | return boot->sectors_per_clusters; | |
852 | if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */ | |
96de65a9 | 853 | return 1U << (-(s8)boot->sectors_per_clusters); |
a3b77434 | 854 | return -EINVAL; |
82cae269 KK |
855 | } |
856 | ||
e8b8e97f KA |
857 | /* |
858 | * ntfs_init_from_boot - Init internal info from on-disk boot sector. | |
f1d325b8 KK |
859 | * |
860 | * NTFS mount begins from boot - special formatted 512 bytes. | |
861 | * There are two boots: the first and the last 512 bytes of volume. | |
862 | * The content of boot is not changed during ntfs life. | |
863 | * | |
864 | * NOTE: ntfs.sys checks only first (primary) boot. | |
865 | * chkdsk checks both boots. | |
e8b8e97f | 866 | */ |
82cae269 | 867 | static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, |
f1d325b8 | 868 | u64 dev_size, struct NTFS_BOOT **boot2) |
82cae269 KK |
869 | { |
870 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
871 | int err; | |
872 | u32 mb, gb, boot_sector_size, sct_per_clst, record_size; | |
dcc852e5 | 873 | u64 sectors, clusters, mlcn, mlcn2, dev_size0; |
82cae269 KK |
874 | struct NTFS_BOOT *boot; |
875 | struct buffer_head *bh; | |
876 | struct MFT_REC *rec; | |
877 | u16 fn, ao; | |
96de65a9 | 878 | u8 cluster_bits; |
6a4cd3ea | 879 | u32 boot_off = 0; |
c39de951 | 880 | sector_t boot_block = 0; |
6a4cd3ea | 881 | const char *hint = "Primary boot"; |
82cae269 | 882 | |
dcc852e5 KK |
883 | /* Save original dev_size. Used with alternative boot. */ |
884 | dev_size0 = dev_size; | |
885 | ||
82cae269 KK |
886 | sbi->volume.blocks = dev_size >> PAGE_SHIFT; |
887 | ||
c39de951 KK |
888 | read_boot: |
889 | bh = ntfs_bread(sb, boot_block); | |
82cae269 | 890 | if (!bh) |
c39de951 | 891 | return boot_block ? -EINVAL : -EIO; |
82cae269 KK |
892 | |
893 | err = -EINVAL; | |
34e6552a PS |
894 | |
895 | /* Corrupted image; do not read OOB */ | |
896 | if (bh->b_size - sizeof(*boot) < boot_off) | |
897 | goto out; | |
898 | ||
6a4cd3ea | 899 | boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off); |
82cae269 | 900 | |
e43f6ec2 | 901 | if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) { |
6a4cd3ea | 902 | ntfs_err(sb, "%s signature is not NTFS.", hint); |
82cae269 | 903 | goto out; |
e43f6ec2 | 904 | } |
82cae269 KK |
905 | |
906 | /* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/ | |
907 | /*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1]) | |
908 | * goto out; | |
909 | */ | |
910 | ||
e43f6ec2 KK |
911 | boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) | |
912 | boot->bytes_per_sector[0]; | |
913 | if (boot_sector_size < SECTOR_SIZE || | |
528c9b3d | 914 | !is_power_of_2(boot_sector_size)) { |
6a4cd3ea KK |
915 | ntfs_err(sb, "%s: invalid bytes per sector %u.", hint, |
916 | boot_sector_size); | |
82cae269 KK |
917 | goto out; |
918 | } | |
919 | ||
920 | /* cluster size: 512, 1K, 2K, 4K, ... 2M */ | |
921 | sct_per_clst = true_sectors_per_clst(boot); | |
e43f6ec2 | 922 | if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) { |
6a4cd3ea KK |
923 | ntfs_err(sb, "%s: invalid sectors per cluster %u.", hint, |
924 | sct_per_clst); | |
82cae269 | 925 | goto out; |
e43f6ec2 KK |
926 | } |
927 | ||
928 | sbi->cluster_size = boot_sector_size * sct_per_clst; | |
929 | sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size); | |
930 | sbi->cluster_mask = sbi->cluster_size - 1; | |
931 | sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; | |
82cae269 KK |
932 | |
933 | mlcn = le64_to_cpu(boot->mft_clst); | |
934 | mlcn2 = le64_to_cpu(boot->mft2_clst); | |
935 | sectors = le64_to_cpu(boot->sectors_per_volume); | |
936 | ||
e43f6ec2 KK |
937 | if (mlcn * sct_per_clst >= sectors || mlcn2 * sct_per_clst >= sectors) { |
938 | ntfs_err( | |
939 | sb, | |
6a4cd3ea KK |
940 | "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", |
941 | hint, mlcn, mlcn2, sectors); | |
82cae269 | 942 | goto out; |
e43f6ec2 | 943 | } |
82cae269 | 944 | |
91a4b1ee KK |
945 | if (boot->record_size >= 0) { |
946 | record_size = (u32)boot->record_size << cluster_bits; | |
947 | } else if (-boot->record_size <= MAXIMUM_SHIFT_BYTES_PER_MFT) { | |
948 | record_size = 1u << (-boot->record_size); | |
949 | } else { | |
950 | ntfs_err(sb, "%s: invalid record size %d.", hint, | |
951 | boot->record_size); | |
952 | goto out; | |
953 | } | |
954 | ||
955 | sbi->record_size = record_size; | |
e43f6ec2 KK |
956 | sbi->record_bits = blksize_bits(record_size); |
957 | sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes | |
82cae269 | 958 | |
e8b8e97f | 959 | /* Check MFT record size. */ |
e43f6ec2 | 960 | if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) { |
6a4cd3ea | 961 | ntfs_err(sb, "%s: invalid bytes per MFT record %u (%d).", hint, |
e43f6ec2 KK |
962 | record_size, boot->record_size); |
963 | goto out; | |
964 | } | |
965 | ||
966 | if (record_size > MAXIMUM_BYTES_PER_MFT) { | |
967 | ntfs_err(sb, "Unsupported bytes per MFT record %u.", | |
968 | record_size); | |
82cae269 KK |
969 | goto out; |
970 | } | |
971 | ||
91a4b1ee KK |
972 | if (boot->index_size >= 0) { |
973 | sbi->index_size = (u32)boot->index_size << cluster_bits; | |
974 | } else if (-boot->index_size <= MAXIMUM_SHIFT_BYTES_PER_INDEX) { | |
975 | sbi->index_size = 1u << (-boot->index_size); | |
976 | } else { | |
977 | ntfs_err(sb, "%s: invalid index size %d.", hint, | |
978 | boot->index_size); | |
979 | goto out; | |
980 | } | |
e43f6ec2 | 981 | |
e8b8e97f | 982 | /* Check index record size. */ |
e43f6ec2 | 983 | if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) { |
6a4cd3ea KK |
984 | ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint, |
985 | sbi->index_size, boot->index_size); | |
e43f6ec2 KK |
986 | goto out; |
987 | } | |
988 | ||
989 | if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) { | |
6a4cd3ea | 990 | ntfs_err(sb, "%s: unsupported bytes per index %u.", hint, |
e43f6ec2 | 991 | sbi->index_size); |
82cae269 KK |
992 | goto out; |
993 | } | |
994 | ||
dbf59e2a | 995 | sbi->volume.size = sectors * boot_sector_size; |
82cae269 | 996 | |
dbf59e2a | 997 | gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb); |
82cae269 KK |
998 | |
999 | /* | |
e8b8e97f KA |
1000 | * - Volume formatted and mounted with the same sector size. |
1001 | * - Volume formatted 4K and mounted as 512. | |
1002 | * - Volume formatted 512 and mounted as 4K. | |
82cae269 | 1003 | */ |
dbf59e2a KK |
1004 | if (boot_sector_size != sector_size) { |
1005 | ntfs_warn( | |
1006 | sb, | |
96de65a9 | 1007 | "Different NTFS sector size (%u) and media sector size (%u).", |
dbf59e2a | 1008 | boot_sector_size, sector_size); |
82cae269 KK |
1009 | dev_size += sector_size - 1; |
1010 | } | |
1011 | ||
96de65a9 KK |
1012 | sbi->mft.lbo = mlcn << cluster_bits; |
1013 | sbi->mft.lbo2 = mlcn2 << cluster_bits; | |
82cae269 | 1014 | |
09f7c338 | 1015 | /* Compare boot's cluster and sector. */ |
e43f6ec2 | 1016 | if (sbi->cluster_size < boot_sector_size) { |
6a4cd3ea | 1017 | ntfs_err(sb, "%s: invalid bytes per cluster (%u).", hint, |
e43f6ec2 | 1018 | sbi->cluster_size); |
82cae269 | 1019 | goto out; |
e43f6ec2 | 1020 | } |
82cae269 | 1021 | |
09f7c338 KK |
1022 | /* Compare boot's cluster and media sector. */ |
1023 | if (sbi->cluster_size < sector_size) { | |
1024 | /* No way to use ntfs_get_block in this case. */ | |
1025 | ntfs_err( | |
1026 | sb, | |
96de65a9 | 1027 | "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).", |
09f7c338 KK |
1028 | sbi->cluster_size, sector_size); |
1029 | goto out; | |
1030 | } | |
1031 | ||
82cae269 | 1032 | sbi->max_bytes_per_attr = |
33e70701 | 1033 | record_size - ALIGN(MFTRECORD_FIXUP_OFFSET, 8) - |
fa3cacf5 KA |
1034 | ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) - |
1035 | ALIGN(sizeof(enum ATTR_TYPE), 8); | |
82cae269 | 1036 | |
82cae269 | 1037 | sbi->volume.ser_num = le64_to_cpu(boot->serial_num); |
82cae269 | 1038 | |
e8b8e97f | 1039 | /* Warning if RAW volume. */ |
dbf59e2a | 1040 | if (dev_size < sbi->volume.size + boot_sector_size) { |
82cae269 KK |
1041 | u32 mb0, gb0; |
1042 | ||
1043 | gb0 = format_size_gb(dev_size, &mb0); | |
1044 | ntfs_warn( | |
1045 | sb, | |
96de65a9 | 1046 | "RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.", |
82cae269 KK |
1047 | gb, mb, gb0, mb0); |
1048 | sb->s_flags |= SB_RDONLY; | |
1049 | } | |
1050 | ||
96de65a9 | 1051 | clusters = sbi->volume.size >> cluster_bits; |
82cae269 | 1052 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER |
e8b8e97f | 1053 | /* 32 bits per cluster. */ |
82cae269 KK |
1054 | if (clusters >> 32) { |
1055 | ntfs_notice( | |
1056 | sb, | |
96de65a9 | 1057 | "NTFS %u.%02u Gb is too big to use 32 bits per cluster.", |
82cae269 KK |
1058 | gb, mb); |
1059 | goto out; | |
1060 | } | |
1061 | #elif BITS_PER_LONG < 64 | |
1062 | #error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS" | |
1063 | #endif | |
1064 | ||
1065 | sbi->used.bitmap.nbits = clusters; | |
1066 | ||
195c52bd | 1067 | rec = kzalloc(record_size, GFP_NOFS); |
82cae269 KK |
1068 | if (!rec) { |
1069 | err = -ENOMEM; | |
1070 | goto out; | |
1071 | } | |
1072 | ||
1073 | sbi->new_rec = rec; | |
1074 | rec->rhdr.sign = NTFS_FILE_SIGNATURE; | |
33e70701 | 1075 | rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET); |
82cae269 KK |
1076 | fn = (sbi->record_size >> SECTOR_SHIFT) + 1; |
1077 | rec->rhdr.fix_num = cpu_to_le16(fn); | |
33e70701 | 1078 | ao = ALIGN(MFTRECORD_FIXUP_OFFSET + sizeof(short) * fn, 8); |
82cae269 | 1079 | rec->attr_off = cpu_to_le16(ao); |
fa3cacf5 | 1080 | rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8)); |
82cae269 KK |
1081 | rec->total = cpu_to_le32(sbi->record_size); |
1082 | ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END; | |
1083 | ||
28861e3b | 1084 | sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE)); |
82cae269 KK |
1085 | |
1086 | sbi->block_mask = sb->s_blocksize - 1; | |
1087 | sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits; | |
1088 | sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits; | |
1089 | ||
e8b8e97f | 1090 | /* Maximum size for normal files. */ |
96de65a9 | 1091 | sbi->maxbytes = (clusters << cluster_bits) - 1; |
82cae269 KK |
1092 | |
1093 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
96de65a9 | 1094 | if (clusters >= (1ull << (64 - cluster_bits))) |
82cae269 KK |
1095 | sbi->maxbytes = -1; |
1096 | sbi->maxbytes_sparse = -1; | |
28861e3b | 1097 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
82cae269 | 1098 | #else |
e8b8e97f | 1099 | /* Maximum size for sparse file. */ |
96de65a9 KK |
1100 | sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1; |
1101 | sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits; | |
82cae269 KK |
1102 | #endif |
1103 | ||
8335ebe1 KK |
1104 | /* |
1105 | * Compute the MFT zone at two steps. | |
1106 | * It would be nice if we are able to allocate 1/8 of | |
1107 | * total clusters for MFT but not more then 512 MB. | |
1108 | */ | |
96de65a9 | 1109 | sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3); |
8335ebe1 | 1110 | |
82cae269 KK |
1111 | err = 0; |
1112 | ||
6a4cd3ea KK |
1113 | if (bh->b_blocknr && !sb_rdonly(sb)) { |
1114 | /* | |
f684073c KK |
1115 | * Alternative boot is ok but primary is not ok. |
1116 | * Do not update primary boot here 'cause it may be faked boot. | |
1117 | * Let ntfs to be mounted and update boot later. | |
1118 | */ | |
f1d325b8 | 1119 | *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN); |
6a4cd3ea KK |
1120 | } |
1121 | ||
82cae269 | 1122 | out: |
c39de951 KK |
1123 | brelse(bh); |
1124 | ||
1125 | if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) { | |
6a4cd3ea | 1126 | u32 block_size = min_t(u32, sector_size, PAGE_SIZE); |
dcc852e5 | 1127 | u64 lbo = dev_size0 - sizeof(*boot); |
6a4cd3ea | 1128 | |
c39de951 | 1129 | boot_block = lbo >> blksize_bits(block_size); |
6a4cd3ea | 1130 | boot_off = lbo & (block_size - 1); |
c39de951 KK |
1131 | if (boot_block && block_size >= boot_off + sizeof(*boot)) { |
1132 | /* | |
1133 | * Try alternative boot (last sector) | |
1134 | */ | |
1135 | sb_set_blocksize(sb, block_size); | |
1136 | hint = "Alternative boot"; | |
1137 | dev_size = dev_size0; /* restore original size. */ | |
1138 | goto read_boot; | |
1139 | } | |
6a4cd3ea | 1140 | } |
82cae269 KK |
1141 | |
1142 | return err; | |
1143 | } | |
1144 | ||
e8b8e97f KA |
1145 | /* |
1146 | * ntfs_fill_super - Try to mount. | |
1147 | */ | |
610f8f5a | 1148 | static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) |
82cae269 KK |
1149 | { |
1150 | int err; | |
610f8f5a | 1151 | struct ntfs_sb_info *sbi = sb->s_fs_info; |
82cae269 | 1152 | struct block_device *bdev = sb->s_bdev; |
e43f6ec2 | 1153 | struct ntfs_mount_options *options; |
10b4f12c | 1154 | struct inode *inode; |
82cae269 | 1155 | struct ntfs_inode *ni; |
ec5fc720 | 1156 | size_t i, tt, bad_len, bad_frags; |
82cae269 KK |
1157 | CLST vcn, lcn, len; |
1158 | struct ATTRIB *attr; | |
1159 | const struct VOLUME_INFO *info; | |
1160 | u32 idx, done, bytes; | |
1161 | struct ATTR_DEF_ENTRY *t; | |
82cae269 | 1162 | u16 *shared; |
82cae269 | 1163 | struct MFT_REF ref; |
6a4cd3ea | 1164 | bool ro = sb_rdonly(sb); |
f1d325b8 | 1165 | struct NTFS_BOOT *boot2 = NULL; |
82cae269 KK |
1166 | |
1167 | ref.high = 0; | |
1168 | ||
82cae269 | 1169 | sbi->sb = sb; |
e43f6ec2 | 1170 | sbi->options = options = fc->fs_private; |
cd39981f | 1171 | fc->fs_private = NULL; |
82cae269 KK |
1172 | sb->s_flags |= SB_NODIRATIME; |
1173 | sb->s_magic = 0x7366746e; // "ntfs" | |
1174 | sb->s_op = &ntfs_sops; | |
1175 | sb->s_export_op = &ntfs_export_ops; | |
1176 | sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec | |
1177 | sb->s_xattr = ntfs_xattr_handlers; | |
e43f6ec2 | 1178 | sb->s_d_op = options->nocase ? &ntfs_dentry_ops : NULL; |
82cae269 | 1179 | |
e43f6ec2 KK |
1180 | options->nls = ntfs_load_nls(options->nls_name); |
1181 | if (IS_ERR(options->nls)) { | |
1182 | options->nls = NULL; | |
1183 | errorf(fc, "Cannot load nls %s", options->nls_name); | |
9b75450d KK |
1184 | err = -EINVAL; |
1185 | goto out; | |
610f8f5a | 1186 | } |
82cae269 | 1187 | |
7b47ef52 CH |
1188 | if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) { |
1189 | sbi->discard_granularity = bdev_discard_granularity(bdev); | |
82cae269 KK |
1190 | sbi->discard_granularity_mask_inv = |
1191 | ~(u64)(sbi->discard_granularity - 1); | |
1192 | } | |
1193 | ||
e8b8e97f | 1194 | /* Parse boot. */ |
f09dac9a | 1195 | err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev), |
f1d325b8 | 1196 | bdev_nr_bytes(bdev), &boot2); |
82cae269 | 1197 | if (err) |
9b75450d | 1198 | goto out; |
82cae269 | 1199 | |
82cae269 | 1200 | /* |
e8b8e97f KA |
1201 | * Load $Volume. This should be done before $LogFile |
1202 | * 'cause 'sbi->volume.ni' is used 'ntfs_set_state'. | |
82cae269 KK |
1203 | */ |
1204 | ref.low = cpu_to_le32(MFT_REC_VOL); | |
1205 | ref.seq = cpu_to_le16(MFT_REC_VOL); | |
1206 | inode = ntfs_iget5(sb, &ref, &NAME_VOLUME); | |
1207 | if (IS_ERR(inode)) { | |
9b75450d | 1208 | err = PTR_ERR(inode); |
e43f6ec2 | 1209 | ntfs_err(sb, "Failed to load $Volume (%d).", err); |
9b75450d | 1210 | goto out; |
82cae269 KK |
1211 | } |
1212 | ||
1213 | ni = ntfs_i(inode); | |
1214 | ||
e8b8e97f | 1215 | /* Load and save label (not necessary). */ |
82cae269 KK |
1216 | attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL); |
1217 | ||
1218 | if (!attr) { | |
1219 | /* It is ok if no ATTR_LABEL */ | |
1220 | } else if (!attr->non_res && !is_attr_ext(attr)) { | |
e8b8e97f | 1221 | /* $AttrDef allows labels to be up to 128 symbols. */ |
82cae269 KK |
1222 | err = utf16s_to_utf8s(resident_data(attr), |
1223 | le32_to_cpu(attr->res.data_size) >> 1, | |
1224 | UTF16_LITTLE_ENDIAN, sbi->volume.label, | |
1225 | sizeof(sbi->volume.label)); | |
1226 | if (err < 0) | |
1227 | sbi->volume.label[0] = 0; | |
1228 | } else { | |
e8b8e97f | 1229 | /* Should we break mounting here? */ |
82cae269 | 1230 | //err = -EINVAL; |
9b75450d | 1231 | //goto put_inode_out; |
82cae269 KK |
1232 | } |
1233 | ||
1234 | attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL); | |
e43f6ec2 KK |
1235 | if (!attr || is_attr_ext(attr) || |
1236 | !(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) { | |
1237 | ntfs_err(sb, "$Volume is corrupted."); | |
82cae269 | 1238 | err = -EINVAL; |
9b75450d | 1239 | goto put_inode_out; |
82cae269 KK |
1240 | } |
1241 | ||
1242 | sbi->volume.major_ver = info->major_ver; | |
1243 | sbi->volume.minor_ver = info->minor_ver; | |
1244 | sbi->volume.flags = info->flags; | |
82cae269 | 1245 | sbi->volume.ni = ni; |
6a4cd3ea KK |
1246 | if (info->flags & VOLUME_FLAG_DIRTY) { |
1247 | sbi->volume.real_dirty = true; | |
1248 | ntfs_info(sb, "It is recommened to use chkdsk."); | |
1249 | } | |
82cae269 | 1250 | |
e8b8e97f | 1251 | /* Load $MFTMirr to estimate recs_mirr. */ |
82cae269 KK |
1252 | ref.low = cpu_to_le32(MFT_REC_MIRR); |
1253 | ref.seq = cpu_to_le16(MFT_REC_MIRR); | |
1254 | inode = ntfs_iget5(sb, &ref, &NAME_MIRROR); | |
1255 | if (IS_ERR(inode)) { | |
9b75450d | 1256 | err = PTR_ERR(inode); |
e43f6ec2 | 1257 | ntfs_err(sb, "Failed to load $MFTMirr (%d).", err); |
9b75450d | 1258 | goto out; |
82cae269 KK |
1259 | } |
1260 | ||
e43f6ec2 KK |
1261 | sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >> |
1262 | sbi->record_bits; | |
82cae269 KK |
1263 | |
1264 | iput(inode); | |
1265 | ||
d3624466 | 1266 | /* Load LogFile to replay. */ |
82cae269 KK |
1267 | ref.low = cpu_to_le32(MFT_REC_LOG); |
1268 | ref.seq = cpu_to_le16(MFT_REC_LOG); | |
1269 | inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); | |
1270 | if (IS_ERR(inode)) { | |
9b75450d | 1271 | err = PTR_ERR(inode); |
e43f6ec2 | 1272 | ntfs_err(sb, "Failed to load \x24LogFile (%d).", err); |
9b75450d | 1273 | goto out; |
82cae269 KK |
1274 | } |
1275 | ||
1276 | ni = ntfs_i(inode); | |
1277 | ||
1278 | err = ntfs_loadlog_and_replay(ni, sbi); | |
1279 | if (err) | |
9b75450d | 1280 | goto put_inode_out; |
82cae269 KK |
1281 | |
1282 | iput(inode); | |
82cae269 | 1283 | |
6a4cd3ea KK |
1284 | if ((sbi->flags & NTFS_FLAGS_NEED_REPLAY) && !ro) { |
1285 | ntfs_warn(sb, "failed to replay log file. Can't mount rw!"); | |
1286 | err = -EINVAL; | |
1287 | goto out; | |
1288 | } | |
1289 | ||
1290 | if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !options->force) { | |
1291 | ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!"); | |
1292 | err = -EINVAL; | |
1293 | goto out; | |
82cae269 KK |
1294 | } |
1295 | ||
e8b8e97f | 1296 | /* Load $MFT. */ |
82cae269 KK |
1297 | ref.low = cpu_to_le32(MFT_REC_MFT); |
1298 | ref.seq = cpu_to_le16(1); | |
1299 | ||
1300 | inode = ntfs_iget5(sb, &ref, &NAME_MFT); | |
1301 | if (IS_ERR(inode)) { | |
9b75450d | 1302 | err = PTR_ERR(inode); |
e43f6ec2 | 1303 | ntfs_err(sb, "Failed to load $MFT (%d).", err); |
9b75450d | 1304 | goto out; |
82cae269 KK |
1305 | } |
1306 | ||
1307 | ni = ntfs_i(inode); | |
1308 | ||
1309 | sbi->mft.used = ni->i_valid >> sbi->record_bits; | |
1310 | tt = inode->i_size >> sbi->record_bits; | |
1311 | sbi->mft.next_free = MFT_REC_USER; | |
1312 | ||
1313 | err = wnd_init(&sbi->mft.bitmap, sb, tt); | |
1314 | if (err) | |
9b75450d | 1315 | goto put_inode_out; |
82cae269 KK |
1316 | |
1317 | err = ni_load_all_mi(ni); | |
e43f6ec2 KK |
1318 | if (err) { |
1319 | ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err); | |
9b75450d | 1320 | goto put_inode_out; |
e43f6ec2 | 1321 | } |
82cae269 KK |
1322 | |
1323 | sbi->mft.ni = ni; | |
1324 | ||
e8b8e97f | 1325 | /* Load $Bitmap. */ |
82cae269 KK |
1326 | ref.low = cpu_to_le32(MFT_REC_BITMAP); |
1327 | ref.seq = cpu_to_le16(MFT_REC_BITMAP); | |
1328 | inode = ntfs_iget5(sb, &ref, &NAME_BITMAP); | |
1329 | if (IS_ERR(inode)) { | |
9b75450d | 1330 | err = PTR_ERR(inode); |
e43f6ec2 | 1331 | ntfs_err(sb, "Failed to load $Bitmap (%d).", err); |
9b75450d | 1332 | goto out; |
82cae269 KK |
1333 | } |
1334 | ||
82cae269 KK |
1335 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER |
1336 | if (inode->i_size >> 32) { | |
1337 | err = -EINVAL; | |
9b75450d | 1338 | goto put_inode_out; |
82cae269 KK |
1339 | } |
1340 | #endif | |
1341 | ||
e8b8e97f | 1342 | /* Check bitmap boundary. */ |
82cae269 KK |
1343 | tt = sbi->used.bitmap.nbits; |
1344 | if (inode->i_size < bitmap_size(tt)) { | |
e43f6ec2 | 1345 | ntfs_err(sb, "$Bitmap is corrupted."); |
82cae269 | 1346 | err = -EINVAL; |
9b75450d | 1347 | goto put_inode_out; |
82cae269 KK |
1348 | } |
1349 | ||
b4f110d6 | 1350 | err = wnd_init(&sbi->used.bitmap, sb, tt); |
e43f6ec2 KK |
1351 | if (err) { |
1352 | ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err); | |
9b75450d | 1353 | goto put_inode_out; |
e43f6ec2 | 1354 | } |
82cae269 KK |
1355 | |
1356 | iput(inode); | |
1357 | ||
e8b8e97f | 1358 | /* Compute the MFT zone. */ |
82cae269 | 1359 | err = ntfs_refresh_zone(sbi); |
e43f6ec2 KK |
1360 | if (err) { |
1361 | ntfs_err(sb, "Failed to initialize MFT zone (%d).", err); | |
9b75450d | 1362 | goto out; |
e43f6ec2 | 1363 | } |
82cae269 | 1364 | |
ec5fc720 KK |
1365 | /* Load $BadClus. */ |
1366 | ref.low = cpu_to_le32(MFT_REC_BADCLUST); | |
1367 | ref.seq = cpu_to_le16(MFT_REC_BADCLUST); | |
1368 | inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS); | |
1369 | if (IS_ERR(inode)) { | |
1370 | err = PTR_ERR(inode); | |
1371 | ntfs_err(sb, "Failed to load $BadClus (%d).", err); | |
1372 | goto out; | |
1373 | } | |
1374 | ||
1375 | ni = ntfs_i(inode); | |
1376 | bad_len = bad_frags = 0; | |
1377 | for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) { | |
1378 | if (lcn == SPARSE_LCN) | |
1379 | continue; | |
1380 | ||
1381 | bad_len += len; | |
1382 | bad_frags += 1; | |
6a4cd3ea | 1383 | if (ro) |
ec5fc720 KK |
1384 | continue; |
1385 | ||
1386 | if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) { | |
1387 | /* Bad blocks marked as free in bitmap. */ | |
1388 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
1389 | } | |
1390 | } | |
1391 | if (bad_len) { | |
1392 | /* | |
1393 | * Notice about bad blocks. | |
1394 | * In normal cases these blocks are marked as used in bitmap. | |
1395 | * And we never allocate space in it. | |
1396 | */ | |
1397 | ntfs_notice(sb, | |
1398 | "Volume contains %zu bad blocks in %zu fragments.", | |
1399 | bad_len, bad_frags); | |
1400 | } | |
1401 | iput(inode); | |
1402 | ||
e8b8e97f | 1403 | /* Load $AttrDef. */ |
82cae269 KK |
1404 | ref.low = cpu_to_le32(MFT_REC_ATTR); |
1405 | ref.seq = cpu_to_le16(MFT_REC_ATTR); | |
b4f110d6 | 1406 | inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF); |
82cae269 | 1407 | if (IS_ERR(inode)) { |
9b75450d | 1408 | err = PTR_ERR(inode); |
e43f6ec2 | 1409 | ntfs_err(sb, "Failed to load $AttrDef (%d)", err); |
9b75450d | 1410 | goto out; |
82cae269 KK |
1411 | } |
1412 | ||
318d016e KK |
1413 | /* |
1414 | * Typical $AttrDef contains up to 20 entries. | |
30200ef8 | 1415 | * Check for extremely large/small size. |
318d016e KK |
1416 | */ |
1417 | if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) || | |
1418 | inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) { | |
1419 | ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).", | |
1420 | inode->i_size); | |
82cae269 | 1421 | err = -EINVAL; |
9b75450d | 1422 | goto put_inode_out; |
82cae269 | 1423 | } |
318d016e | 1424 | |
82cae269 | 1425 | bytes = inode->i_size; |
fc471e39 | 1426 | sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL); |
82cae269 KK |
1427 | if (!t) { |
1428 | err = -ENOMEM; | |
9b75450d | 1429 | goto put_inode_out; |
82cae269 KK |
1430 | } |
1431 | ||
1432 | for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) { | |
1433 | unsigned long tail = bytes - done; | |
1434 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1435 | ||
1436 | if (IS_ERR(page)) { | |
1437 | err = PTR_ERR(page); | |
e43f6ec2 | 1438 | ntfs_err(sb, "Failed to read $AttrDef (%d).", err); |
9b75450d | 1439 | goto put_inode_out; |
82cae269 KK |
1440 | } |
1441 | memcpy(Add2Ptr(t, done), page_address(page), | |
1442 | min(PAGE_SIZE, tail)); | |
1443 | ntfs_unmap_page(page); | |
1444 | ||
1445 | if (!idx && ATTR_STD != t->type) { | |
e43f6ec2 | 1446 | ntfs_err(sb, "$AttrDef is corrupted."); |
82cae269 | 1447 | err = -EINVAL; |
9b75450d | 1448 | goto put_inode_out; |
82cae269 KK |
1449 | } |
1450 | } | |
1451 | ||
1452 | t += 1; | |
1453 | sbi->def_entries = 1; | |
1454 | done = sizeof(struct ATTR_DEF_ENTRY); | |
1455 | sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE; | |
f8d87ed9 | 1456 | sbi->ea_max_size = 0x10000; /* default formatter value */ |
82cae269 KK |
1457 | |
1458 | while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) { | |
1459 | u32 t32 = le32_to_cpu(t->type); | |
1460 | u64 sz = le64_to_cpu(t->max_sz); | |
1461 | ||
1462 | if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32) | |
1463 | break; | |
1464 | ||
1465 | if (t->type == ATTR_REPARSE) | |
1466 | sbi->reparse.max_size = sz; | |
1467 | else if (t->type == ATTR_EA) | |
1468 | sbi->ea_max_size = sz; | |
1469 | ||
1470 | done += sizeof(struct ATTR_DEF_ENTRY); | |
1471 | t += 1; | |
1472 | sbi->def_entries += 1; | |
1473 | } | |
1474 | iput(inode); | |
1475 | ||
e8b8e97f | 1476 | /* Load $UpCase. */ |
82cae269 KK |
1477 | ref.low = cpu_to_le32(MFT_REC_UPCASE); |
1478 | ref.seq = cpu_to_le16(MFT_REC_UPCASE); | |
1479 | inode = ntfs_iget5(sb, &ref, &NAME_UPCASE); | |
1480 | if (IS_ERR(inode)) { | |
9b75450d | 1481 | err = PTR_ERR(inode); |
e43f6ec2 | 1482 | ntfs_err(sb, "Failed to load $UpCase (%d).", err); |
9b75450d | 1483 | goto out; |
82cae269 KK |
1484 | } |
1485 | ||
82cae269 KK |
1486 | if (inode->i_size != 0x10000 * sizeof(short)) { |
1487 | err = -EINVAL; | |
e43f6ec2 | 1488 | ntfs_err(sb, "$UpCase is corrupted."); |
9b75450d | 1489 | goto put_inode_out; |
82cae269 KK |
1490 | } |
1491 | ||
82cae269 KK |
1492 | for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) { |
1493 | const __le16 *src; | |
0056b273 | 1494 | u16 *dst = Add2Ptr(sbi->upcase, idx << PAGE_SHIFT); |
82cae269 KK |
1495 | struct page *page = ntfs_map_page(inode->i_mapping, idx); |
1496 | ||
1497 | if (IS_ERR(page)) { | |
1498 | err = PTR_ERR(page); | |
e43f6ec2 | 1499 | ntfs_err(sb, "Failed to read $UpCase (%d).", err); |
9b75450d | 1500 | goto put_inode_out; |
82cae269 KK |
1501 | } |
1502 | ||
1503 | src = page_address(page); | |
1504 | ||
1505 | #ifdef __BIG_ENDIAN | |
1506 | for (i = 0; i < PAGE_SIZE / sizeof(u16); i++) | |
1507 | *dst++ = le16_to_cpu(*src++); | |
1508 | #else | |
1509 | memcpy(dst, src, PAGE_SIZE); | |
1510 | #endif | |
1511 | ntfs_unmap_page(page); | |
1512 | } | |
1513 | ||
0056b273 KA |
1514 | shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); |
1515 | if (shared && sbi->upcase != shared) { | |
1516 | kvfree(sbi->upcase); | |
82cae269 | 1517 | sbi->upcase = shared; |
82cae269 KK |
1518 | } |
1519 | ||
1520 | iput(inode); | |
82cae269 KK |
1521 | |
1522 | if (is_ntfs3(sbi)) { | |
e8b8e97f | 1523 | /* Load $Secure. */ |
82cae269 | 1524 | err = ntfs_security_init(sbi); |
e43f6ec2 KK |
1525 | if (err) { |
1526 | ntfs_err(sb, "Failed to initialize $Secure (%d).", err); | |
9b75450d | 1527 | goto out; |
e43f6ec2 | 1528 | } |
82cae269 | 1529 | |
e8b8e97f | 1530 | /* Load $Extend. */ |
82cae269 | 1531 | err = ntfs_extend_init(sbi); |
e43f6ec2 KK |
1532 | if (err) { |
1533 | ntfs_warn(sb, "Failed to initialize $Extend."); | |
82cae269 | 1534 | goto load_root; |
e43f6ec2 | 1535 | } |
82cae269 | 1536 | |
e43f6ec2 | 1537 | /* Load $Extend/$Reparse. */ |
82cae269 | 1538 | err = ntfs_reparse_init(sbi); |
e43f6ec2 KK |
1539 | if (err) { |
1540 | ntfs_warn(sb, "Failed to initialize $Extend/$Reparse."); | |
82cae269 | 1541 | goto load_root; |
e43f6ec2 | 1542 | } |
82cae269 | 1543 | |
e43f6ec2 | 1544 | /* Load $Extend/$ObjId. */ |
82cae269 | 1545 | err = ntfs_objid_init(sbi); |
e43f6ec2 KK |
1546 | if (err) { |
1547 | ntfs_warn(sb, "Failed to initialize $Extend/$ObjId."); | |
82cae269 | 1548 | goto load_root; |
e43f6ec2 | 1549 | } |
82cae269 KK |
1550 | } |
1551 | ||
1552 | load_root: | |
e8b8e97f | 1553 | /* Load root. */ |
82cae269 KK |
1554 | ref.low = cpu_to_le32(MFT_REC_ROOT); |
1555 | ref.seq = cpu_to_le16(MFT_REC_ROOT); | |
1556 | inode = ntfs_iget5(sb, &ref, &NAME_ROOT); | |
788ee160 | 1557 | if (IS_ERR(inode)) { |
e43f6ec2 KK |
1558 | err = PTR_ERR(inode); |
1559 | ntfs_err(sb, "Failed to load root (%d).", err); | |
9b75450d | 1560 | goto out; |
82cae269 KK |
1561 | } |
1562 | ||
788ee160 KK |
1563 | /* |
1564 | * Final check. Looks like this case should never occurs. | |
1565 | */ | |
1566 | if (!inode->i_op) { | |
1567 | err = -EINVAL; | |
1568 | ntfs_err(sb, "Failed to load root (%d).", err); | |
1569 | goto put_inode_out; | |
1570 | } | |
1571 | ||
82cae269 | 1572 | sb->s_root = d_make_root(inode); |
9b75450d KK |
1573 | if (!sb->s_root) { |
1574 | err = -ENOMEM; | |
1575 | goto put_inode_out; | |
1576 | } | |
82cae269 | 1577 | |
f1d325b8 KK |
1578 | if (boot2) { |
1579 | /* | |
f684073c KK |
1580 | * Alternative boot is ok but primary is not ok. |
1581 | * Volume is recognized as NTFS. Update primary boot. | |
1582 | */ | |
f1d325b8 KK |
1583 | struct buffer_head *bh0 = sb_getblk(sb, 0); |
1584 | if (bh0) { | |
1585 | if (buffer_locked(bh0)) | |
1586 | __wait_on_buffer(bh0); | |
1587 | ||
1588 | lock_buffer(bh0); | |
1589 | memcpy(bh0->b_data, boot2, sizeof(*boot2)); | |
1590 | set_buffer_uptodate(bh0); | |
1591 | mark_buffer_dirty(bh0); | |
1592 | unlock_buffer(bh0); | |
1593 | if (!sync_dirty_buffer(bh0)) | |
1594 | ntfs_warn(sb, "primary boot is updated"); | |
1595 | put_bh(bh0); | |
1596 | } | |
1597 | ||
1598 | kfree(boot2); | |
1599 | } | |
1600 | ||
7832e123 KK |
1601 | #ifdef CONFIG_PROC_FS |
1602 | /* Create /proc/fs/ntfs3/.. */ | |
1603 | if (proc_info_root) { | |
1604 | struct proc_dir_entry *e = proc_mkdir(sb->s_id, proc_info_root); | |
44b4494d | 1605 | static_assert((S_IRUGO | S_IWUSR) == 0644); |
7832e123 | 1606 | if (e) { |
44b4494d | 1607 | proc_create_data("volinfo", S_IRUGO, e, |
7832e123 | 1608 | &ntfs3_volinfo_fops, sb); |
44b4494d KK |
1609 | proc_create_data("label", S_IRUGO | S_IWUSR, e, |
1610 | &ntfs3_label_fops, sb); | |
7832e123 KK |
1611 | sbi->procdir = e; |
1612 | } | |
1613 | } | |
1614 | #endif | |
1615 | ||
82cae269 | 1616 | return 0; |
9b75450d KK |
1617 | |
1618 | put_inode_out: | |
82cae269 | 1619 | iput(inode); |
9b75450d | 1620 | out: |
493c7192 | 1621 | ntfs3_put_sbi(sbi); |
f1d325b8 | 1622 | kfree(boot2); |
4ad5c924 | 1623 | ntfs3_put_sbi(sbi); |
82cae269 KK |
1624 | return err; |
1625 | } | |
1626 | ||
1627 | void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len) | |
1628 | { | |
1629 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1630 | struct block_device *bdev = sb->s_bdev; | |
1631 | sector_t devblock = (u64)lcn * sbi->blocks_per_cluster; | |
1632 | unsigned long blocks = (u64)len * sbi->blocks_per_cluster; | |
1633 | unsigned long cnt = 0; | |
1634 | unsigned long limit = global_zone_page_state(NR_FREE_PAGES) | |
1635 | << (PAGE_SHIFT - sb->s_blocksize_bits); | |
1636 | ||
1637 | if (limit >= 0x2000) | |
1638 | limit -= 0x1000; | |
1639 | else if (limit < 32) | |
1640 | limit = 32; | |
1641 | else | |
1642 | limit >>= 1; | |
1643 | ||
1644 | while (blocks--) { | |
1645 | clean_bdev_aliases(bdev, devblock++, 1); | |
1646 | if (cnt++ >= limit) { | |
1647 | sync_blockdev(bdev); | |
1648 | cnt = 0; | |
1649 | } | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | /* | |
e8b8e97f | 1654 | * ntfs_discard - Issue a discard request (trim for SSD). |
82cae269 KK |
1655 | */ |
1656 | int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len) | |
1657 | { | |
1658 | int err; | |
1659 | u64 lbo, bytes, start, end; | |
1660 | struct super_block *sb; | |
1661 | ||
1662 | if (sbi->used.next_free_lcn == lcn + len) | |
1663 | sbi->used.next_free_lcn = lcn; | |
1664 | ||
1665 | if (sbi->flags & NTFS_FLAGS_NODISCARD) | |
1666 | return -EOPNOTSUPP; | |
1667 | ||
564c97bd | 1668 | if (!sbi->options->discard) |
82cae269 KK |
1669 | return -EOPNOTSUPP; |
1670 | ||
1671 | lbo = (u64)lcn << sbi->cluster_bits; | |
1672 | bytes = (u64)len << sbi->cluster_bits; | |
1673 | ||
e8b8e97f | 1674 | /* Align up 'start' on discard_granularity. */ |
82cae269 KK |
1675 | start = (lbo + sbi->discard_granularity - 1) & |
1676 | sbi->discard_granularity_mask_inv; | |
e8b8e97f | 1677 | /* Align down 'end' on discard_granularity. */ |
82cae269 KK |
1678 | end = (lbo + bytes) & sbi->discard_granularity_mask_inv; |
1679 | ||
1680 | sb = sbi->sb; | |
1681 | if (start >= end) | |
1682 | return 0; | |
1683 | ||
1684 | err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9, | |
44abff2c | 1685 | GFP_NOFS); |
82cae269 KK |
1686 | |
1687 | if (err == -EOPNOTSUPP) | |
1688 | sbi->flags |= NTFS_FLAGS_NODISCARD; | |
1689 | ||
1690 | return err; | |
1691 | } | |
1692 | ||
610f8f5a KA |
1693 | static int ntfs_fs_get_tree(struct fs_context *fc) |
1694 | { | |
1695 | return get_tree_bdev(fc, ntfs_fill_super); | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | * ntfs_fs_free - Free fs_context. | |
1700 | * | |
1701 | * Note that this will be called after fill_super and reconfigure | |
1702 | * even when they pass. So they have to take pointers if they pass. | |
1703 | */ | |
1704 | static void ntfs_fs_free(struct fs_context *fc) | |
1705 | { | |
1706 | struct ntfs_mount_options *opts = fc->fs_private; | |
1707 | struct ntfs_sb_info *sbi = fc->s_fs_info; | |
1708 | ||
78a06688 CB |
1709 | if (sbi) { |
1710 | ntfs3_put_sbi(sbi); | |
126dbf8a | 1711 | ntfs3_free_sbi(sbi); |
78a06688 | 1712 | } |
610f8f5a KA |
1713 | |
1714 | if (opts) | |
1715 | put_mount_options(opts); | |
1716 | } | |
1717 | ||
f0377761 | 1718 | // clang-format off |
610f8f5a KA |
1719 | static const struct fs_context_operations ntfs_context_ops = { |
1720 | .parse_param = ntfs_fs_parse_param, | |
1721 | .get_tree = ntfs_fs_get_tree, | |
1722 | .reconfigure = ntfs_fs_reconfigure, | |
1723 | .free = ntfs_fs_free, | |
1724 | }; | |
f0377761 | 1725 | // clang-format on |
610f8f5a KA |
1726 | |
1727 | /* | |
96de65a9 | 1728 | * ntfs_init_fs_context - Initialize sbi and opts |
610f8f5a | 1729 | * |
6700eabb | 1730 | * This will called when mount/remount. We will first initialize |
610f8f5a KA |
1731 | * options so that if remount we can use just that. |
1732 | */ | |
1733 | static int ntfs_init_fs_context(struct fs_context *fc) | |
82cae269 | 1734 | { |
610f8f5a KA |
1735 | struct ntfs_mount_options *opts; |
1736 | struct ntfs_sb_info *sbi; | |
1737 | ||
1738 | opts = kzalloc(sizeof(struct ntfs_mount_options), GFP_NOFS); | |
1739 | if (!opts) | |
1740 | return -ENOMEM; | |
1741 | ||
1742 | /* Default options. */ | |
1743 | opts->fs_uid = current_uid(); | |
1744 | opts->fs_gid = current_gid(); | |
1745 | opts->fs_fmask_inv = ~current_umask(); | |
1746 | opts->fs_dmask_inv = ~current_umask(); | |
1747 | ||
1748 | if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) | |
1749 | goto ok; | |
1750 | ||
1751 | sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS); | |
27fac777 KA |
1752 | if (!sbi) |
1753 | goto free_opts; | |
1754 | ||
1755 | sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL); | |
1756 | if (!sbi->upcase) | |
1757 | goto free_sbi; | |
1758 | ||
1759 | ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL, | |
1760 | DEFAULT_RATELIMIT_BURST); | |
1761 | ||
1762 | mutex_init(&sbi->compress.mtx_lznt); | |
1763 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1764 | mutex_init(&sbi->compress.mtx_xpress); | |
1765 | mutex_init(&sbi->compress.mtx_lzx); | |
1766 | #endif | |
610f8f5a | 1767 | |
610f8f5a KA |
1768 | fc->s_fs_info = sbi; |
1769 | ok: | |
1770 | fc->fs_private = opts; | |
1771 | fc->ops = &ntfs_context_ops; | |
1772 | ||
1773 | return 0; | |
27fac777 KA |
1774 | free_sbi: |
1775 | kfree(sbi); | |
880301bb CIK |
1776 | free_opts: |
1777 | kfree(opts); | |
27fac777 | 1778 | return -ENOMEM; |
82cae269 KK |
1779 | } |
1780 | ||
a4f64a30 CH |
1781 | static void ntfs3_kill_sb(struct super_block *sb) |
1782 | { | |
1783 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1784 | ||
1785 | kill_block_super(sb); | |
1786 | ||
1787 | if (sbi->options) | |
1788 | put_mount_options(sbi->options); | |
1789 | ntfs3_free_sbi(sbi); | |
1790 | } | |
1791 | ||
82cae269 KK |
1792 | // clang-format off |
1793 | static struct file_system_type ntfs_fs_type = { | |
610f8f5a KA |
1794 | .owner = THIS_MODULE, |
1795 | .name = "ntfs3", | |
1796 | .init_fs_context = ntfs_init_fs_context, | |
1797 | .parameters = ntfs_fs_parameters, | |
a4f64a30 | 1798 | .kill_sb = ntfs3_kill_sb, |
610f8f5a | 1799 | .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, |
82cae269 KK |
1800 | }; |
1801 | // clang-format on | |
1802 | ||
1803 | static int __init init_ntfs_fs(void) | |
1804 | { | |
1805 | int err; | |
1806 | ||
2e3a51b5 | 1807 | pr_info("ntfs3: Max link count %u\n", NTFS_LINK_MAX); |
82cae269 | 1808 | |
2e3a51b5 KA |
1809 | if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL)) |
1810 | pr_info("ntfs3: Enabled Linux POSIX ACLs support\n"); | |
1811 | if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER)) | |
96de65a9 KK |
1812 | pr_notice( |
1813 | "ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n"); | |
2e3a51b5 KA |
1814 | if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS)) |
1815 | pr_info("ntfs3: Read-only LZX/Xpress compression included\n"); | |
82cae269 | 1816 | |
7832e123 KK |
1817 | #ifdef CONFIG_PROC_FS |
1818 | /* Create "/proc/fs/ntfs3" */ | |
1819 | proc_info_root = proc_mkdir("fs/ntfs3", NULL); | |
1820 | #endif | |
1821 | ||
82cae269 KK |
1822 | err = ntfs3_init_bitmap(); |
1823 | if (err) | |
1824 | return err; | |
1825 | ||
1826 | ntfs_inode_cachep = kmem_cache_create( | |
1827 | "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, | |
f88c3fb8 | 1828 | (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), |
82cae269 KK |
1829 | init_once); |
1830 | if (!ntfs_inode_cachep) { | |
1831 | err = -ENOMEM; | |
1832 | goto out1; | |
1833 | } | |
1834 | ||
1835 | err = register_filesystem(&ntfs_fs_type); | |
1836 | if (err) | |
1837 | goto out; | |
1838 | ||
1839 | return 0; | |
1840 | out: | |
1841 | kmem_cache_destroy(ntfs_inode_cachep); | |
1842 | out1: | |
1843 | ntfs3_exit_bitmap(); | |
1844 | return err; | |
1845 | } | |
1846 | ||
1847 | static void __exit exit_ntfs_fs(void) | |
1848 | { | |
ae6b47b5 KK |
1849 | rcu_barrier(); |
1850 | kmem_cache_destroy(ntfs_inode_cachep); | |
82cae269 KK |
1851 | unregister_filesystem(&ntfs_fs_type); |
1852 | ntfs3_exit_bitmap(); | |
7832e123 KK |
1853 | |
1854 | #ifdef CONFIG_PROC_FS | |
1855 | if (proc_info_root) | |
1856 | remove_proc_entry("fs/ntfs3", NULL); | |
1857 | #endif | |
82cae269 KK |
1858 | } |
1859 | ||
1860 | MODULE_LICENSE("GPL"); | |
1861 | MODULE_DESCRIPTION("ntfs3 read/write filesystem"); | |
82cae269 KK |
1862 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL |
1863 | MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support"); | |
1864 | #endif | |
1865 | #ifdef CONFIG_NTFS3_64BIT_CLUSTER | |
96de65a9 KK |
1866 | MODULE_INFO( |
1867 | cluster, | |
1868 | "Warning: Activated 64 bits per cluster. Windows does not support this"); | |
82cae269 KK |
1869 | #endif |
1870 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1871 | MODULE_INFO(compression, "Read-only lzx/xpress compression included"); | |
1872 | #endif | |
1873 | ||
1874 | MODULE_AUTHOR("Konstantin Komarov"); | |
1875 | MODULE_ALIAS_FS("ntfs3"); | |
1876 | ||
1877 | module_init(init_ntfs_fs); | |
1878 | module_exit(exit_ntfs_fs); |