Commit | Line | Data |
---|---|---|
09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/fs/affs/inode.c | |
4 | * | |
5 | * (c) 1996 Hans-Joachim Widmaier - Rewritten | |
6 | * | |
7 | * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. | |
8 | * | |
9 | * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem. | |
10 | * | |
11 | * (C) 1991 Linus Torvalds - minix filesystem | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/statfs.h> | |
17 | #include <linux/parser.h> | |
e18fa700 | 18 | #include <linux/magic.h> |
e8edc6e0 | 19 | #include <linux/sched.h> |
5b825c3a | 20 | #include <linux/cred.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
3dd84782 | 22 | #include <linux/writeback.h> |
e852d82a | 23 | #include <linux/blkdev.h> |
26a7655e | 24 | #include <linux/seq_file.h> |
9dffe569 | 25 | #include <linux/iversion.h> |
1da177e4 LT |
26 | #include "affs.h" |
27 | ||
726c3342 | 28 | static int affs_statfs(struct dentry *dentry, struct kstatfs *buf); |
26a7655e | 29 | static int affs_show_options(struct seq_file *m, struct dentry *root); |
1da177e4 LT |
30 | static int affs_remount (struct super_block *sb, int *flags, char *data); |
31 | ||
e2896436 | 32 | static void |
bc86256d | 33 | affs_commit_super(struct super_block *sb, int wait) |
e2896436 CH |
34 | { |
35 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
36 | struct buffer_head *bh = sbi->s_root_bh; | |
37 | struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh); | |
38 | ||
a8371074 | 39 | lock_buffer(bh); |
c1618208 | 40 | affs_secs_to_datestamp(ktime_get_real_seconds(), &tail->disk_change); |
e2896436 | 41 | affs_fix_checksum(sb, bh); |
a8371074 AB |
42 | unlock_buffer(bh); |
43 | ||
e2896436 | 44 | mark_buffer_dirty(bh); |
7435d506 AB |
45 | if (wait) |
46 | sync_dirty_buffer(bh); | |
e2896436 CH |
47 | } |
48 | ||
1da177e4 LT |
49 | static void |
50 | affs_put_super(struct super_block *sb) | |
51 | { | |
52 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
9606d9aa | 53 | pr_debug("%s()\n", __func__); |
1da177e4 | 54 | |
3dd84782 | 55 | cancel_delayed_work_sync(&sbi->sb_work); |
1da177e4 LT |
56 | } |
57 | ||
e2896436 CH |
58 | static int |
59 | affs_sync_fs(struct super_block *sb, int wait) | |
60 | { | |
bc86256d | 61 | affs_commit_super(sb, wait); |
e2896436 CH |
62 | return 0; |
63 | } | |
64 | ||
3dd84782 AB |
65 | static void flush_superblock(struct work_struct *work) |
66 | { | |
67 | struct affs_sb_info *sbi; | |
68 | struct super_block *sb; | |
69 | ||
70 | sbi = container_of(work, struct affs_sb_info, sb_work.work); | |
71 | sb = sbi->sb; | |
72 | ||
73 | spin_lock(&sbi->work_lock); | |
74 | sbi->work_queued = 0; | |
75 | spin_unlock(&sbi->work_lock); | |
76 | ||
77 | affs_commit_super(sb, 1); | |
78 | } | |
79 | ||
80 | void affs_mark_sb_dirty(struct super_block *sb) | |
81 | { | |
82 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
83 | unsigned long delay; | |
84 | ||
bc98a42c | 85 | if (sb_rdonly(sb)) |
3dd84782 AB |
86 | return; |
87 | ||
88 | spin_lock(&sbi->work_lock); | |
89 | if (!sbi->work_queued) { | |
90 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
91 | queue_delayed_work(system_long_wq, &sbi->sb_work, delay); | |
92 | sbi->work_queued = 1; | |
93 | } | |
94 | spin_unlock(&sbi->work_lock); | |
95 | } | |
96 | ||
e18b890b | 97 | static struct kmem_cache * affs_inode_cachep; |
1da177e4 LT |
98 | |
99 | static struct inode *affs_alloc_inode(struct super_block *sb) | |
100 | { | |
dca3c336 RZ |
101 | struct affs_inode_info *i; |
102 | ||
103 | i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL); | |
104 | if (!i) | |
1da177e4 | 105 | return NULL; |
dca3c336 | 106 | |
9dffe569 | 107 | inode_set_iversion(&i->vfs_inode, 1); |
dca3c336 RZ |
108 | i->i_lc = NULL; |
109 | i->i_ext_bh = NULL; | |
110 | i->i_pa_cnt = 0; | |
111 | ||
112 | return &i->vfs_inode; | |
1da177e4 LT |
113 | } |
114 | ||
312a6791 | 115 | static void affs_free_inode(struct inode *inode) |
1da177e4 LT |
116 | { |
117 | kmem_cache_free(affs_inode_cachep, AFFS_I(inode)); | |
118 | } | |
119 | ||
51cc5068 | 120 | static void init_once(void *foo) |
1da177e4 LT |
121 | { |
122 | struct affs_inode_info *ei = (struct affs_inode_info *) foo; | |
123 | ||
756b0322 TG |
124 | sema_init(&ei->i_link_lock, 1); |
125 | sema_init(&ei->i_ext_lock, 1); | |
a35afb83 | 126 | inode_init_once(&ei->vfs_inode); |
1da177e4 LT |
127 | } |
128 | ||
adbd319e | 129 | static int __init init_inodecache(void) |
1da177e4 LT |
130 | { |
131 | affs_inode_cachep = kmem_cache_create("affs_inode_cache", | |
132 | sizeof(struct affs_inode_info), | |
fffb60f9 | 133 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 134 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 135 | init_once); |
1da177e4 LT |
136 | if (affs_inode_cachep == NULL) |
137 | return -ENOMEM; | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static void destroy_inodecache(void) | |
142 | { | |
8c0a8537 KS |
143 | /* |
144 | * Make sure all delayed rcu free inodes are flushed before we | |
145 | * destroy cache. | |
146 | */ | |
147 | rcu_barrier(); | |
1a1d92c1 | 148 | kmem_cache_destroy(affs_inode_cachep); |
1da177e4 LT |
149 | } |
150 | ||
ee9b6d61 | 151 | static const struct super_operations affs_sops = { |
1da177e4 | 152 | .alloc_inode = affs_alloc_inode, |
312a6791 | 153 | .free_inode = affs_free_inode, |
1da177e4 | 154 | .write_inode = affs_write_inode, |
f053ddde | 155 | .evict_inode = affs_evict_inode, |
1da177e4 | 156 | .put_super = affs_put_super, |
e2896436 | 157 | .sync_fs = affs_sync_fs, |
1da177e4 LT |
158 | .statfs = affs_statfs, |
159 | .remount_fs = affs_remount, | |
26a7655e | 160 | .show_options = affs_show_options, |
1da177e4 LT |
161 | }; |
162 | ||
163 | enum { | |
8ca57722 | 164 | Opt_bs, Opt_mode, Opt_mufs, Opt_notruncate, Opt_prefix, Opt_protect, |
1da177e4 LT |
165 | Opt_reserved, Opt_root, Opt_setgid, Opt_setuid, |
166 | Opt_verbose, Opt_volume, Opt_ignore, Opt_err, | |
167 | }; | |
168 | ||
a447c093 | 169 | static const match_table_t tokens = { |
1da177e4 LT |
170 | {Opt_bs, "bs=%u"}, |
171 | {Opt_mode, "mode=%o"}, | |
172 | {Opt_mufs, "mufs"}, | |
8ca57722 | 173 | {Opt_notruncate, "nofilenametruncate"}, |
1da177e4 LT |
174 | {Opt_prefix, "prefix=%s"}, |
175 | {Opt_protect, "protect"}, | |
176 | {Opt_reserved, "reserved=%u"}, | |
177 | {Opt_root, "root=%u"}, | |
178 | {Opt_setgid, "setgid=%u"}, | |
179 | {Opt_setuid, "setuid=%u"}, | |
180 | {Opt_verbose, "verbose"}, | |
181 | {Opt_volume, "volume=%s"}, | |
182 | {Opt_ignore, "grpquota"}, | |
183 | {Opt_ignore, "noquota"}, | |
184 | {Opt_ignore, "quota"}, | |
185 | {Opt_ignore, "usrquota"}, | |
186 | {Opt_err, NULL}, | |
187 | }; | |
188 | ||
189 | static int | |
8fed10be | 190 | parse_options(char *options, kuid_t *uid, kgid_t *gid, int *mode, int *reserved, s32 *root, |
1da177e4 LT |
191 | int *blocksize, char **prefix, char *volume, unsigned long *mount_opts) |
192 | { | |
193 | char *p; | |
194 | substring_t args[MAX_OPT_ARGS]; | |
195 | ||
196 | /* Fill in defaults */ | |
197 | ||
21559981 DH |
198 | *uid = current_uid(); |
199 | *gid = current_gid(); | |
1da177e4 LT |
200 | *reserved = 2; |
201 | *root = -1; | |
202 | *blocksize = -1; | |
203 | volume[0] = ':'; | |
204 | volume[1] = 0; | |
205 | *mount_opts = 0; | |
206 | if (!options) | |
207 | return 1; | |
208 | ||
209 | while ((p = strsep(&options, ",")) != NULL) { | |
210 | int token, n, option; | |
211 | if (!*p) | |
212 | continue; | |
213 | ||
214 | token = match_token(p, tokens, args); | |
215 | switch (token) { | |
216 | case Opt_bs: | |
217 | if (match_int(&args[0], &n)) | |
217686e9 | 218 | return 0; |
1da177e4 LT |
219 | if (n != 512 && n != 1024 && n != 2048 |
220 | && n != 4096) { | |
0158de12 | 221 | pr_warn("Invalid blocksize (512, 1024, 2048, 4096 allowed)\n"); |
1da177e4 LT |
222 | return 0; |
223 | } | |
224 | *blocksize = n; | |
225 | break; | |
226 | case Opt_mode: | |
227 | if (match_octal(&args[0], &option)) | |
217686e9 | 228 | return 0; |
1da177e4 | 229 | *mode = option & 0777; |
34f24835 | 230 | affs_set_opt(*mount_opts, SF_SETMODE); |
1da177e4 LT |
231 | break; |
232 | case Opt_mufs: | |
34f24835 | 233 | affs_set_opt(*mount_opts, SF_MUFS); |
1da177e4 | 234 | break; |
8ca57722 | 235 | case Opt_notruncate: |
34f24835 | 236 | affs_set_opt(*mount_opts, SF_NO_TRUNCATE); |
8ca57722 | 237 | break; |
1da177e4 | 238 | case Opt_prefix: |
84ae6f82 | 239 | kfree(*prefix); |
1da177e4 LT |
240 | *prefix = match_strdup(&args[0]); |
241 | if (!*prefix) | |
242 | return 0; | |
34f24835 | 243 | affs_set_opt(*mount_opts, SF_PREFIX); |
1da177e4 LT |
244 | break; |
245 | case Opt_protect: | |
34f24835 | 246 | affs_set_opt(*mount_opts, SF_IMMUTABLE); |
1da177e4 LT |
247 | break; |
248 | case Opt_reserved: | |
249 | if (match_int(&args[0], reserved)) | |
217686e9 | 250 | return 0; |
1da177e4 LT |
251 | break; |
252 | case Opt_root: | |
253 | if (match_int(&args[0], root)) | |
217686e9 | 254 | return 0; |
1da177e4 LT |
255 | break; |
256 | case Opt_setgid: | |
257 | if (match_int(&args[0], &option)) | |
217686e9 | 258 | return 0; |
8fed10be EB |
259 | *gid = make_kgid(current_user_ns(), option); |
260 | if (!gid_valid(*gid)) | |
261 | return 0; | |
34f24835 | 262 | affs_set_opt(*mount_opts, SF_SETGID); |
1da177e4 LT |
263 | break; |
264 | case Opt_setuid: | |
265 | if (match_int(&args[0], &option)) | |
217686e9 | 266 | return 0; |
8fed10be EB |
267 | *uid = make_kuid(current_user_ns(), option); |
268 | if (!uid_valid(*uid)) | |
269 | return 0; | |
34f24835 | 270 | affs_set_opt(*mount_opts, SF_SETUID); |
1da177e4 LT |
271 | break; |
272 | case Opt_verbose: | |
34f24835 | 273 | affs_set_opt(*mount_opts, SF_VERBOSE); |
1da177e4 LT |
274 | break; |
275 | case Opt_volume: { | |
276 | char *vol = match_strdup(&args[0]); | |
6db27dd9 JM |
277 | if (!vol) |
278 | return 0; | |
1da177e4 LT |
279 | strlcpy(volume, vol, 32); |
280 | kfree(vol); | |
281 | break; | |
282 | } | |
283 | case Opt_ignore: | |
284 | /* Silently ignore the quota options */ | |
285 | break; | |
286 | default: | |
0158de12 FF |
287 | pr_warn("Unrecognized mount option \"%s\" or missing value\n", |
288 | p); | |
1da177e4 LT |
289 | return 0; |
290 | } | |
291 | } | |
292 | return 1; | |
293 | } | |
294 | ||
26a7655e DH |
295 | static int affs_show_options(struct seq_file *m, struct dentry *root) |
296 | { | |
297 | struct super_block *sb = root->d_sb; | |
298 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
299 | ||
300 | if (sb->s_blocksize) | |
301 | seq_printf(m, ",bs=%lu", sb->s_blocksize); | |
302 | if (affs_test_opt(sbi->s_flags, SF_SETMODE)) | |
303 | seq_printf(m, ",mode=%o", sbi->s_mode); | |
304 | if (affs_test_opt(sbi->s_flags, SF_MUFS)) | |
305 | seq_puts(m, ",mufs"); | |
306 | if (affs_test_opt(sbi->s_flags, SF_NO_TRUNCATE)) | |
307 | seq_puts(m, ",nofilenametruncate"); | |
308 | if (affs_test_opt(sbi->s_flags, SF_PREFIX)) | |
309 | seq_printf(m, ",prefix=%s", sbi->s_prefix); | |
310 | if (affs_test_opt(sbi->s_flags, SF_IMMUTABLE)) | |
311 | seq_puts(m, ",protect"); | |
312 | if (sbi->s_reserved != 2) | |
313 | seq_printf(m, ",reserved=%u", sbi->s_reserved); | |
314 | if (sbi->s_root_block != (sbi->s_reserved + sbi->s_partition_size - 1) / 2) | |
315 | seq_printf(m, ",root=%u", sbi->s_root_block); | |
316 | if (affs_test_opt(sbi->s_flags, SF_SETGID)) | |
317 | seq_printf(m, ",setgid=%u", | |
318 | from_kgid_munged(&init_user_ns, sbi->s_gid)); | |
319 | if (affs_test_opt(sbi->s_flags, SF_SETUID)) | |
320 | seq_printf(m, ",setuid=%u", | |
321 | from_kuid_munged(&init_user_ns, sbi->s_uid)); | |
322 | if (affs_test_opt(sbi->s_flags, SF_VERBOSE)) | |
323 | seq_puts(m, ",verbose"); | |
324 | if (sbi->s_volume[0]) | |
325 | seq_printf(m, ",volume=%s", sbi->s_volume); | |
326 | return 0; | |
327 | } | |
328 | ||
1da177e4 LT |
329 | /* This function definitely needs to be split up. Some fine day I'll |
330 | * hopefully have the guts to do so. Until then: sorry for the mess. | |
331 | */ | |
332 | ||
333 | static int affs_fill_super(struct super_block *sb, void *data, int silent) | |
334 | { | |
335 | struct affs_sb_info *sbi; | |
336 | struct buffer_head *root_bh = NULL; | |
337 | struct buffer_head *boot_bh; | |
338 | struct inode *root_inode = NULL; | |
339 | s32 root_block; | |
340 | int size, blocksize; | |
341 | u32 chksum; | |
342 | int num_bm; | |
343 | int i, j; | |
8fed10be EB |
344 | kuid_t uid; |
345 | kgid_t gid; | |
1da177e4 LT |
346 | int reserved; |
347 | unsigned long mount_flags; | |
348 | int tmp_flags; /* fix remount prototype... */ | |
2b943cf0 | 349 | u8 sig[4]; |
842a859d | 350 | int ret; |
1da177e4 | 351 | |
9606d9aa | 352 | pr_debug("read_super(%s)\n", data ? (const char *)data : "no options"); |
1da177e4 LT |
353 | |
354 | sb->s_magic = AFFS_SUPER_MAGIC; | |
355 | sb->s_op = &affs_sops; | |
1751e8a6 | 356 | sb->s_flags |= SB_NODIRATIME; |
1da177e4 | 357 | |
f8314dc6 | 358 | sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL); |
1da177e4 LT |
359 | if (!sbi) |
360 | return -ENOMEM; | |
74c41429 | 361 | |
1da177e4 | 362 | sb->s_fs_info = sbi; |
a215fef7 | 363 | sbi->sb = sb; |
7d135a5d | 364 | mutex_init(&sbi->s_bmlock); |
29333920 | 365 | spin_lock_init(&sbi->symlink_lock); |
3dd84782 AB |
366 | spin_lock_init(&sbi->work_lock); |
367 | INIT_DELAYED_WORK(&sbi->sb_work, flush_superblock); | |
1da177e4 LT |
368 | |
369 | if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, | |
370 | &blocksize,&sbi->s_prefix, | |
371 | sbi->s_volume, &mount_flags)) { | |
0158de12 | 372 | pr_err("Error parsing options\n"); |
1da177e4 LT |
373 | return -EINVAL; |
374 | } | |
375 | /* N.B. after this point s_prefix must be released */ | |
376 | ||
377 | sbi->s_flags = mount_flags; | |
378 | sbi->s_mode = i; | |
379 | sbi->s_uid = uid; | |
380 | sbi->s_gid = gid; | |
381 | sbi->s_reserved= reserved; | |
382 | ||
383 | /* Get the size of the device in 512-byte blocks. | |
384 | * If we later see that the partition uses bigger | |
385 | * blocks, we will have to change it. | |
386 | */ | |
387 | ||
e852d82a | 388 | size = i_size_read(sb->s_bdev->bd_inode) >> 9; |
9606d9aa | 389 | pr_debug("initial blocksize=%d, #blocks=%d\n", 512, size); |
1da177e4 LT |
390 | |
391 | affs_set_blocksize(sb, PAGE_SIZE); | |
392 | /* Try to find root block. Its location depends on the block size. */ | |
393 | ||
e852d82a PKS |
394 | i = bdev_logical_block_size(sb->s_bdev); |
395 | j = PAGE_SIZE; | |
1da177e4 LT |
396 | if (blocksize > 0) { |
397 | i = j = blocksize; | |
398 | size = size / (blocksize / 512); | |
399 | } | |
e852d82a | 400 | |
1e907f4f | 401 | for (blocksize = i; blocksize <= j; blocksize <<= 1, size >>= 1) { |
1da177e4 LT |
402 | sbi->s_root_block = root_block; |
403 | if (root_block < 0) | |
404 | sbi->s_root_block = (reserved + size - 1) / 2; | |
9606d9aa | 405 | pr_debug("setting blocksize to %d\n", blocksize); |
1da177e4 LT |
406 | affs_set_blocksize(sb, blocksize); |
407 | sbi->s_partition_size = size; | |
408 | ||
409 | /* The root block location that was calculated above is not | |
410 | * correct if the partition size is an odd number of 512- | |
411 | * byte blocks, which will be rounded down to a number of | |
412 | * 1024-byte blocks, and if there were an even number of | |
413 | * reserved blocks. Ideally, all partition checkers should | |
414 | * report the real number of blocks of the real blocksize, | |
415 | * but since this just cannot be done, we have to try to | |
416 | * find the root block anyways. In the above case, it is one | |
417 | * block behind the calculated one. So we check this one, too. | |
418 | */ | |
419 | for (num_bm = 0; num_bm < 2; num_bm++) { | |
9606d9aa | 420 | pr_debug("Dev %s, trying root=%u, bs=%d, " |
1da177e4 LT |
421 | "size=%d, reserved=%d\n", |
422 | sb->s_id, | |
423 | sbi->s_root_block + num_bm, | |
424 | blocksize, size, reserved); | |
425 | root_bh = affs_bread(sb, sbi->s_root_block + num_bm); | |
426 | if (!root_bh) | |
427 | continue; | |
428 | if (!affs_checksum_block(sb, root_bh) && | |
429 | be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT && | |
430 | be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) { | |
431 | sbi->s_hashsize = blocksize / 4 - 56; | |
432 | sbi->s_root_block += num_bm; | |
1da177e4 LT |
433 | goto got_root; |
434 | } | |
435 | affs_brelse(root_bh); | |
436 | root_bh = NULL; | |
437 | } | |
438 | } | |
439 | if (!silent) | |
0158de12 | 440 | pr_err("No valid root block on device %s\n", sb->s_id); |
842a859d | 441 | return -EINVAL; |
1da177e4 LT |
442 | |
443 | /* N.B. after this point bh must be released */ | |
444 | got_root: | |
842a859d AV |
445 | /* Keep super block in cache */ |
446 | sbi->s_root_bh = root_bh; | |
1da177e4 LT |
447 | root_block = sbi->s_root_block; |
448 | ||
449 | /* Find out which kind of FS we have */ | |
450 | boot_bh = sb_bread(sb, 0); | |
451 | if (!boot_bh) { | |
0158de12 | 452 | pr_err("Cannot read boot block\n"); |
842a859d | 453 | return -EINVAL; |
1da177e4 | 454 | } |
2b943cf0 | 455 | memcpy(sig, boot_bh->b_data, 4); |
1da177e4 | 456 | brelse(boot_bh); |
2b943cf0 | 457 | chksum = be32_to_cpu(*(__be32 *)sig); |
1da177e4 LT |
458 | |
459 | /* Dircache filesystems are compatible with non-dircache ones | |
460 | * when reading. As long as they aren't supported, writing is | |
461 | * not recommended. | |
462 | */ | |
463 | if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS | |
bc98a42c | 464 | || chksum == MUFS_DCOFS) && !sb_rdonly(sb)) { |
0158de12 | 465 | pr_notice("Dircache FS - mounting %s read only\n", sb->s_id); |
1751e8a6 | 466 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
467 | } |
468 | switch (chksum) { | |
0445f01a FF |
469 | case MUFS_FS: |
470 | case MUFS_INTLFFS: | |
471 | case MUFS_DCFFS: | |
34f24835 | 472 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0445f01a FF |
473 | /* fall thru */ |
474 | case FS_INTLFFS: | |
475 | case FS_DCFFS: | |
34f24835 | 476 | affs_set_opt(sbi->s_flags, SF_INTL); |
0445f01a FF |
477 | break; |
478 | case MUFS_FFS: | |
34f24835 | 479 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0445f01a FF |
480 | break; |
481 | case FS_FFS: | |
482 | break; | |
483 | case MUFS_OFS: | |
34f24835 | 484 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0a4c9265 | 485 | /* fall through */ |
0445f01a | 486 | case FS_OFS: |
34f24835 | 487 | affs_set_opt(sbi->s_flags, SF_OFS); |
1751e8a6 | 488 | sb->s_flags |= SB_NOEXEC; |
0445f01a FF |
489 | break; |
490 | case MUFS_DCOFS: | |
491 | case MUFS_INTLOFS: | |
34f24835 | 492 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0a4c9265 | 493 | /* fall through */ |
0445f01a FF |
494 | case FS_DCOFS: |
495 | case FS_INTLOFS: | |
34f24835 FF |
496 | affs_set_opt(sbi->s_flags, SF_INTL); |
497 | affs_set_opt(sbi->s_flags, SF_OFS); | |
1751e8a6 | 498 | sb->s_flags |= SB_NOEXEC; |
0445f01a FF |
499 | break; |
500 | default: | |
501 | pr_err("Unknown filesystem on device %s: %08X\n", | |
502 | sb->s_id, chksum); | |
503 | return -EINVAL; | |
1da177e4 LT |
504 | } |
505 | ||
79bda4d5 | 506 | if (affs_test_opt(mount_flags, SF_VERBOSE)) { |
2b943cf0 | 507 | u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0]; |
0158de12 | 508 | pr_notice("Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n", |
2b943cf0 | 509 | len > 31 ? 31 : len, |
1da177e4 | 510 | AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1, |
2b943cf0 | 511 | sig, sig[3] + '0', blocksize); |
1da177e4 LT |
512 | } |
513 | ||
1751e8a6 | 514 | sb->s_flags |= SB_NODEV | SB_NOSUID; |
1da177e4 LT |
515 | |
516 | sbi->s_data_blksize = sb->s_blocksize; | |
79bda4d5 | 517 | if (affs_test_opt(sbi->s_flags, SF_OFS)) |
1da177e4 LT |
518 | sbi->s_data_blksize -= 24; |
519 | ||
1da177e4 | 520 | tmp_flags = sb->s_flags; |
842a859d AV |
521 | ret = affs_init_bitmap(sb, &tmp_flags); |
522 | if (ret) | |
523 | return ret; | |
1da177e4 LT |
524 | sb->s_flags = tmp_flags; |
525 | ||
526 | /* set up enough so that it can read an inode */ | |
527 | ||
210f8559 | 528 | root_inode = affs_iget(sb, root_block); |
842a859d AV |
529 | if (IS_ERR(root_inode)) |
530 | return PTR_ERR(root_inode); | |
210f8559 | 531 | |
79bda4d5 | 532 | if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_INTL)) |
a129880d AV |
533 | sb->s_d_op = &affs_intl_dentry_operations; |
534 | else | |
535 | sb->s_d_op = &affs_dentry_operations; | |
536 | ||
48fde701 | 537 | sb->s_root = d_make_root(root_inode); |
1da177e4 | 538 | if (!sb->s_root) { |
0158de12 | 539 | pr_err("AFFS: Get root inode failed\n"); |
842a859d | 540 | return -ENOMEM; |
1da177e4 | 541 | } |
1da177e4 | 542 | |
ed4433d7 | 543 | sb->s_export_op = &affs_export_ops; |
9606d9aa | 544 | pr_debug("s_flags=%lX\n", sb->s_flags); |
1da177e4 | 545 | return 0; |
1da177e4 LT |
546 | } |
547 | ||
548 | static int | |
549 | affs_remount(struct super_block *sb, int *flags, char *data) | |
550 | { | |
551 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
552 | int blocksize; | |
8fed10be EB |
553 | kuid_t uid; |
554 | kgid_t gid; | |
1da177e4 LT |
555 | int mode; |
556 | int reserved; | |
557 | int root_block; | |
558 | unsigned long mount_flags; | |
559 | int res = 0; | |
c8f33d0b | 560 | char *new_opts; |
29333920 AV |
561 | char volume[32]; |
562 | char *prefix = NULL; | |
1da177e4 | 563 | |
c8f33d0b | 564 | new_opts = kstrdup(data, GFP_KERNEL); |
01d6e087 | 565 | if (data && !new_opts) |
c8f33d0b SK |
566 | return -ENOMEM; |
567 | ||
9606d9aa | 568 | pr_debug("%s(flags=0x%x,opts=\"%s\")\n", __func__, *flags, data); |
1da177e4 | 569 | |
02b9984d | 570 | sync_filesystem(sb); |
1751e8a6 | 571 | *flags |= SB_NODIRATIME; |
1da177e4 | 572 | |
29333920 | 573 | memcpy(volume, sbi->s_volume, 32); |
e9b3961b | 574 | if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block, |
29333920 | 575 | &blocksize, &prefix, volume, |
e9b3961b | 576 | &mount_flags)) { |
29333920 | 577 | kfree(prefix); |
e9b3961b | 578 | kfree(new_opts); |
1da177e4 | 579 | return -EINVAL; |
e9b3961b | 580 | } |
74c41429 | 581 | |
43829731 | 582 | flush_delayed_work(&sbi->sb_work); |
e9b3961b | 583 | |
1da177e4 LT |
584 | sbi->s_flags = mount_flags; |
585 | sbi->s_mode = mode; | |
586 | sbi->s_uid = uid; | |
587 | sbi->s_gid = gid; | |
29333920 AV |
588 | /* protect against readers */ |
589 | spin_lock(&sbi->symlink_lock); | |
590 | if (prefix) { | |
591 | kfree(sbi->s_prefix); | |
592 | sbi->s_prefix = prefix; | |
593 | } | |
594 | memcpy(sbi->s_volume, volume, 32); | |
595 | spin_unlock(&sbi->symlink_lock); | |
1da177e4 | 596 | |
1751e8a6 | 597 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
1da177e4 | 598 | return 0; |
74c41429 | 599 | |
1751e8a6 | 600 | if (*flags & SB_RDONLY) |
1da177e4 | 601 | affs_free_bitmap(sb); |
0164b1a3 | 602 | else |
1da177e4 LT |
603 | res = affs_init_bitmap(sb, flags); |
604 | ||
605 | return res; | |
606 | } | |
607 | ||
608 | static int | |
726c3342 | 609 | affs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 610 | { |
726c3342 | 611 | struct super_block *sb = dentry->d_sb; |
1da177e4 | 612 | int free; |
a6a2a73c | 613 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4 | 614 | |
9606d9aa FF |
615 | pr_debug("%s() partsize=%d, reserved=%d\n", |
616 | __func__, AFFS_SB(sb)->s_partition_size, | |
617 | AFFS_SB(sb)->s_reserved); | |
1da177e4 LT |
618 | |
619 | free = affs_count_free_blocks(sb); | |
620 | buf->f_type = AFFS_SUPER_MAGIC; | |
621 | buf->f_bsize = sb->s_blocksize; | |
622 | buf->f_blocks = AFFS_SB(sb)->s_partition_size - AFFS_SB(sb)->s_reserved; | |
623 | buf->f_bfree = free; | |
624 | buf->f_bavail = free; | |
a6a2a73c CL |
625 | buf->f_fsid.val[0] = (u32)id; |
626 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
f157853e | 627 | buf->f_namelen = AFFSNAMEMAX; |
1da177e4 LT |
628 | return 0; |
629 | } | |
630 | ||
152a0836 AV |
631 | static struct dentry *affs_mount(struct file_system_type *fs_type, |
632 | int flags, const char *dev_name, void *data) | |
1da177e4 | 633 | { |
152a0836 | 634 | return mount_bdev(fs_type, flags, dev_name, data, affs_fill_super); |
1da177e4 LT |
635 | } |
636 | ||
842a859d AV |
637 | static void affs_kill_sb(struct super_block *sb) |
638 | { | |
639 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
640 | kill_block_super(sb); | |
641 | if (sbi) { | |
642 | affs_free_bitmap(sb); | |
643 | affs_brelse(sbi->s_root_bh); | |
644 | kfree(sbi->s_prefix); | |
4d29e571 | 645 | mutex_destroy(&sbi->s_bmlock); |
842a859d AV |
646 | kfree(sbi); |
647 | } | |
648 | } | |
649 | ||
1da177e4 LT |
650 | static struct file_system_type affs_fs_type = { |
651 | .owner = THIS_MODULE, | |
652 | .name = "affs", | |
152a0836 | 653 | .mount = affs_mount, |
842a859d | 654 | .kill_sb = affs_kill_sb, |
1da177e4 LT |
655 | .fs_flags = FS_REQUIRES_DEV, |
656 | }; | |
7f78e035 | 657 | MODULE_ALIAS_FS("affs"); |
1da177e4 LT |
658 | |
659 | static int __init init_affs_fs(void) | |
660 | { | |
661 | int err = init_inodecache(); | |
662 | if (err) | |
663 | goto out1; | |
664 | err = register_filesystem(&affs_fs_type); | |
665 | if (err) | |
666 | goto out; | |
667 | return 0; | |
668 | out: | |
669 | destroy_inodecache(); | |
670 | out1: | |
671 | return err; | |
672 | } | |
673 | ||
674 | static void __exit exit_affs_fs(void) | |
675 | { | |
676 | unregister_filesystem(&affs_fs_type); | |
677 | destroy_inodecache(); | |
678 | } | |
679 | ||
680 | MODULE_DESCRIPTION("Amiga filesystem support for Linux"); | |
681 | MODULE_LICENSE("GPL"); | |
682 | ||
683 | module_init(init_affs_fs) | |
684 | module_exit(exit_affs_fs) |