Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/affs/inode.c | |
3 | * | |
4 | * (c) 1996 Hans-Joachim Widmaier - Rewritten | |
5 | * | |
6 | * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. | |
7 | * | |
8 | * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem. | |
9 | * | |
10 | * (C) 1991 Linus Torvalds - minix filesystem | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/statfs.h> | |
16 | #include <linux/parser.h> | |
e18fa700 | 17 | #include <linux/magic.h> |
e8edc6e0 | 18 | #include <linux/sched.h> |
5b825c3a | 19 | #include <linux/cred.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
3dd84782 | 21 | #include <linux/writeback.h> |
e852d82a | 22 | #include <linux/blkdev.h> |
26a7655e | 23 | #include <linux/seq_file.h> |
9dffe569 | 24 | #include <linux/iversion.h> |
1da177e4 LT |
25 | #include "affs.h" |
26 | ||
726c3342 | 27 | static int affs_statfs(struct dentry *dentry, struct kstatfs *buf); |
26a7655e | 28 | static int affs_show_options(struct seq_file *m, struct dentry *root); |
1da177e4 LT |
29 | static int affs_remount (struct super_block *sb, int *flags, char *data); |
30 | ||
e2896436 | 31 | static void |
bc86256d | 32 | affs_commit_super(struct super_block *sb, int wait) |
e2896436 CH |
33 | { |
34 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
35 | struct buffer_head *bh = sbi->s_root_bh; | |
36 | struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh); | |
37 | ||
a8371074 | 38 | lock_buffer(bh); |
c1618208 | 39 | affs_secs_to_datestamp(ktime_get_real_seconds(), &tail->disk_change); |
e2896436 | 40 | affs_fix_checksum(sb, bh); |
a8371074 AB |
41 | unlock_buffer(bh); |
42 | ||
e2896436 | 43 | mark_buffer_dirty(bh); |
7435d506 AB |
44 | if (wait) |
45 | sync_dirty_buffer(bh); | |
e2896436 CH |
46 | } |
47 | ||
1da177e4 LT |
48 | static void |
49 | affs_put_super(struct super_block *sb) | |
50 | { | |
51 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
9606d9aa | 52 | pr_debug("%s()\n", __func__); |
1da177e4 | 53 | |
3dd84782 | 54 | cancel_delayed_work_sync(&sbi->sb_work); |
1da177e4 LT |
55 | } |
56 | ||
e2896436 CH |
57 | static int |
58 | affs_sync_fs(struct super_block *sb, int wait) | |
59 | { | |
bc86256d | 60 | affs_commit_super(sb, wait); |
e2896436 CH |
61 | return 0; |
62 | } | |
63 | ||
3dd84782 AB |
64 | static void flush_superblock(struct work_struct *work) |
65 | { | |
66 | struct affs_sb_info *sbi; | |
67 | struct super_block *sb; | |
68 | ||
69 | sbi = container_of(work, struct affs_sb_info, sb_work.work); | |
70 | sb = sbi->sb; | |
71 | ||
72 | spin_lock(&sbi->work_lock); | |
73 | sbi->work_queued = 0; | |
74 | spin_unlock(&sbi->work_lock); | |
75 | ||
76 | affs_commit_super(sb, 1); | |
77 | } | |
78 | ||
79 | void affs_mark_sb_dirty(struct super_block *sb) | |
80 | { | |
81 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
82 | unsigned long delay; | |
83 | ||
bc98a42c | 84 | if (sb_rdonly(sb)) |
3dd84782 AB |
85 | return; |
86 | ||
87 | spin_lock(&sbi->work_lock); | |
88 | if (!sbi->work_queued) { | |
89 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
90 | queue_delayed_work(system_long_wq, &sbi->sb_work, delay); | |
91 | sbi->work_queued = 1; | |
92 | } | |
93 | spin_unlock(&sbi->work_lock); | |
94 | } | |
95 | ||
e18b890b | 96 | static struct kmem_cache * affs_inode_cachep; |
1da177e4 LT |
97 | |
98 | static struct inode *affs_alloc_inode(struct super_block *sb) | |
99 | { | |
dca3c336 RZ |
100 | struct affs_inode_info *i; |
101 | ||
102 | i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL); | |
103 | if (!i) | |
1da177e4 | 104 | return NULL; |
dca3c336 | 105 | |
9dffe569 | 106 | inode_set_iversion(&i->vfs_inode, 1); |
dca3c336 RZ |
107 | i->i_lc = NULL; |
108 | i->i_ext_bh = NULL; | |
109 | i->i_pa_cnt = 0; | |
110 | ||
111 | return &i->vfs_inode; | |
1da177e4 LT |
112 | } |
113 | ||
fa0d7e3d | 114 | static void affs_i_callback(struct rcu_head *head) |
1da177e4 | 115 | { |
fa0d7e3d | 116 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
117 | kmem_cache_free(affs_inode_cachep, AFFS_I(inode)); |
118 | } | |
119 | ||
fa0d7e3d NP |
120 | static void affs_destroy_inode(struct inode *inode) |
121 | { | |
122 | call_rcu(&inode->i_rcu, affs_i_callback); | |
123 | } | |
124 | ||
51cc5068 | 125 | static void init_once(void *foo) |
1da177e4 LT |
126 | { |
127 | struct affs_inode_info *ei = (struct affs_inode_info *) foo; | |
128 | ||
756b0322 TG |
129 | sema_init(&ei->i_link_lock, 1); |
130 | sema_init(&ei->i_ext_lock, 1); | |
a35afb83 | 131 | inode_init_once(&ei->vfs_inode); |
1da177e4 LT |
132 | } |
133 | ||
adbd319e | 134 | static int __init init_inodecache(void) |
1da177e4 LT |
135 | { |
136 | affs_inode_cachep = kmem_cache_create("affs_inode_cache", | |
137 | sizeof(struct affs_inode_info), | |
fffb60f9 | 138 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 139 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 140 | init_once); |
1da177e4 LT |
141 | if (affs_inode_cachep == NULL) |
142 | return -ENOMEM; | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static void destroy_inodecache(void) | |
147 | { | |
8c0a8537 KS |
148 | /* |
149 | * Make sure all delayed rcu free inodes are flushed before we | |
150 | * destroy cache. | |
151 | */ | |
152 | rcu_barrier(); | |
1a1d92c1 | 153 | kmem_cache_destroy(affs_inode_cachep); |
1da177e4 LT |
154 | } |
155 | ||
ee9b6d61 | 156 | static const struct super_operations affs_sops = { |
1da177e4 LT |
157 | .alloc_inode = affs_alloc_inode, |
158 | .destroy_inode = affs_destroy_inode, | |
1da177e4 | 159 | .write_inode = affs_write_inode, |
f053ddde | 160 | .evict_inode = affs_evict_inode, |
1da177e4 | 161 | .put_super = affs_put_super, |
e2896436 | 162 | .sync_fs = affs_sync_fs, |
1da177e4 LT |
163 | .statfs = affs_statfs, |
164 | .remount_fs = affs_remount, | |
26a7655e | 165 | .show_options = affs_show_options, |
1da177e4 LT |
166 | }; |
167 | ||
168 | enum { | |
8ca57722 | 169 | Opt_bs, Opt_mode, Opt_mufs, Opt_notruncate, Opt_prefix, Opt_protect, |
1da177e4 LT |
170 | Opt_reserved, Opt_root, Opt_setgid, Opt_setuid, |
171 | Opt_verbose, Opt_volume, Opt_ignore, Opt_err, | |
172 | }; | |
173 | ||
a447c093 | 174 | static const match_table_t tokens = { |
1da177e4 LT |
175 | {Opt_bs, "bs=%u"}, |
176 | {Opt_mode, "mode=%o"}, | |
177 | {Opt_mufs, "mufs"}, | |
8ca57722 | 178 | {Opt_notruncate, "nofilenametruncate"}, |
1da177e4 LT |
179 | {Opt_prefix, "prefix=%s"}, |
180 | {Opt_protect, "protect"}, | |
181 | {Opt_reserved, "reserved=%u"}, | |
182 | {Opt_root, "root=%u"}, | |
183 | {Opt_setgid, "setgid=%u"}, | |
184 | {Opt_setuid, "setuid=%u"}, | |
185 | {Opt_verbose, "verbose"}, | |
186 | {Opt_volume, "volume=%s"}, | |
187 | {Opt_ignore, "grpquota"}, | |
188 | {Opt_ignore, "noquota"}, | |
189 | {Opt_ignore, "quota"}, | |
190 | {Opt_ignore, "usrquota"}, | |
191 | {Opt_err, NULL}, | |
192 | }; | |
193 | ||
194 | static int | |
8fed10be | 195 | parse_options(char *options, kuid_t *uid, kgid_t *gid, int *mode, int *reserved, s32 *root, |
1da177e4 LT |
196 | int *blocksize, char **prefix, char *volume, unsigned long *mount_opts) |
197 | { | |
198 | char *p; | |
199 | substring_t args[MAX_OPT_ARGS]; | |
200 | ||
201 | /* Fill in defaults */ | |
202 | ||
21559981 DH |
203 | *uid = current_uid(); |
204 | *gid = current_gid(); | |
1da177e4 LT |
205 | *reserved = 2; |
206 | *root = -1; | |
207 | *blocksize = -1; | |
208 | volume[0] = ':'; | |
209 | volume[1] = 0; | |
210 | *mount_opts = 0; | |
211 | if (!options) | |
212 | return 1; | |
213 | ||
214 | while ((p = strsep(&options, ",")) != NULL) { | |
215 | int token, n, option; | |
216 | if (!*p) | |
217 | continue; | |
218 | ||
219 | token = match_token(p, tokens, args); | |
220 | switch (token) { | |
221 | case Opt_bs: | |
222 | if (match_int(&args[0], &n)) | |
217686e9 | 223 | return 0; |
1da177e4 LT |
224 | if (n != 512 && n != 1024 && n != 2048 |
225 | && n != 4096) { | |
0158de12 | 226 | pr_warn("Invalid blocksize (512, 1024, 2048, 4096 allowed)\n"); |
1da177e4 LT |
227 | return 0; |
228 | } | |
229 | *blocksize = n; | |
230 | break; | |
231 | case Opt_mode: | |
232 | if (match_octal(&args[0], &option)) | |
217686e9 | 233 | return 0; |
1da177e4 | 234 | *mode = option & 0777; |
34f24835 | 235 | affs_set_opt(*mount_opts, SF_SETMODE); |
1da177e4 LT |
236 | break; |
237 | case Opt_mufs: | |
34f24835 | 238 | affs_set_opt(*mount_opts, SF_MUFS); |
1da177e4 | 239 | break; |
8ca57722 | 240 | case Opt_notruncate: |
34f24835 | 241 | affs_set_opt(*mount_opts, SF_NO_TRUNCATE); |
8ca57722 | 242 | break; |
1da177e4 | 243 | case Opt_prefix: |
1da177e4 LT |
244 | *prefix = match_strdup(&args[0]); |
245 | if (!*prefix) | |
246 | return 0; | |
34f24835 | 247 | affs_set_opt(*mount_opts, SF_PREFIX); |
1da177e4 LT |
248 | break; |
249 | case Opt_protect: | |
34f24835 | 250 | affs_set_opt(*mount_opts, SF_IMMUTABLE); |
1da177e4 LT |
251 | break; |
252 | case Opt_reserved: | |
253 | if (match_int(&args[0], reserved)) | |
217686e9 | 254 | return 0; |
1da177e4 LT |
255 | break; |
256 | case Opt_root: | |
257 | if (match_int(&args[0], root)) | |
217686e9 | 258 | return 0; |
1da177e4 LT |
259 | break; |
260 | case Opt_setgid: | |
261 | if (match_int(&args[0], &option)) | |
217686e9 | 262 | return 0; |
8fed10be EB |
263 | *gid = make_kgid(current_user_ns(), option); |
264 | if (!gid_valid(*gid)) | |
265 | return 0; | |
34f24835 | 266 | affs_set_opt(*mount_opts, SF_SETGID); |
1da177e4 LT |
267 | break; |
268 | case Opt_setuid: | |
269 | if (match_int(&args[0], &option)) | |
217686e9 | 270 | return 0; |
8fed10be EB |
271 | *uid = make_kuid(current_user_ns(), option); |
272 | if (!uid_valid(*uid)) | |
273 | return 0; | |
34f24835 | 274 | affs_set_opt(*mount_opts, SF_SETUID); |
1da177e4 LT |
275 | break; |
276 | case Opt_verbose: | |
34f24835 | 277 | affs_set_opt(*mount_opts, SF_VERBOSE); |
1da177e4 LT |
278 | break; |
279 | case Opt_volume: { | |
280 | char *vol = match_strdup(&args[0]); | |
6db27dd9 JM |
281 | if (!vol) |
282 | return 0; | |
1da177e4 LT |
283 | strlcpy(volume, vol, 32); |
284 | kfree(vol); | |
285 | break; | |
286 | } | |
287 | case Opt_ignore: | |
288 | /* Silently ignore the quota options */ | |
289 | break; | |
290 | default: | |
0158de12 FF |
291 | pr_warn("Unrecognized mount option \"%s\" or missing value\n", |
292 | p); | |
1da177e4 LT |
293 | return 0; |
294 | } | |
295 | } | |
296 | return 1; | |
297 | } | |
298 | ||
26a7655e DH |
299 | static int affs_show_options(struct seq_file *m, struct dentry *root) |
300 | { | |
301 | struct super_block *sb = root->d_sb; | |
302 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
303 | ||
304 | if (sb->s_blocksize) | |
305 | seq_printf(m, ",bs=%lu", sb->s_blocksize); | |
306 | if (affs_test_opt(sbi->s_flags, SF_SETMODE)) | |
307 | seq_printf(m, ",mode=%o", sbi->s_mode); | |
308 | if (affs_test_opt(sbi->s_flags, SF_MUFS)) | |
309 | seq_puts(m, ",mufs"); | |
310 | if (affs_test_opt(sbi->s_flags, SF_NO_TRUNCATE)) | |
311 | seq_puts(m, ",nofilenametruncate"); | |
312 | if (affs_test_opt(sbi->s_flags, SF_PREFIX)) | |
313 | seq_printf(m, ",prefix=%s", sbi->s_prefix); | |
314 | if (affs_test_opt(sbi->s_flags, SF_IMMUTABLE)) | |
315 | seq_puts(m, ",protect"); | |
316 | if (sbi->s_reserved != 2) | |
317 | seq_printf(m, ",reserved=%u", sbi->s_reserved); | |
318 | if (sbi->s_root_block != (sbi->s_reserved + sbi->s_partition_size - 1) / 2) | |
319 | seq_printf(m, ",root=%u", sbi->s_root_block); | |
320 | if (affs_test_opt(sbi->s_flags, SF_SETGID)) | |
321 | seq_printf(m, ",setgid=%u", | |
322 | from_kgid_munged(&init_user_ns, sbi->s_gid)); | |
323 | if (affs_test_opt(sbi->s_flags, SF_SETUID)) | |
324 | seq_printf(m, ",setuid=%u", | |
325 | from_kuid_munged(&init_user_ns, sbi->s_uid)); | |
326 | if (affs_test_opt(sbi->s_flags, SF_VERBOSE)) | |
327 | seq_puts(m, ",verbose"); | |
328 | if (sbi->s_volume[0]) | |
329 | seq_printf(m, ",volume=%s", sbi->s_volume); | |
330 | return 0; | |
331 | } | |
332 | ||
1da177e4 LT |
333 | /* This function definitely needs to be split up. Some fine day I'll |
334 | * hopefully have the guts to do so. Until then: sorry for the mess. | |
335 | */ | |
336 | ||
337 | static int affs_fill_super(struct super_block *sb, void *data, int silent) | |
338 | { | |
339 | struct affs_sb_info *sbi; | |
340 | struct buffer_head *root_bh = NULL; | |
341 | struct buffer_head *boot_bh; | |
342 | struct inode *root_inode = NULL; | |
343 | s32 root_block; | |
344 | int size, blocksize; | |
345 | u32 chksum; | |
346 | int num_bm; | |
347 | int i, j; | |
8fed10be EB |
348 | kuid_t uid; |
349 | kgid_t gid; | |
1da177e4 LT |
350 | int reserved; |
351 | unsigned long mount_flags; | |
352 | int tmp_flags; /* fix remount prototype... */ | |
2b943cf0 | 353 | u8 sig[4]; |
842a859d | 354 | int ret; |
1da177e4 | 355 | |
9606d9aa | 356 | pr_debug("read_super(%s)\n", data ? (const char *)data : "no options"); |
1da177e4 LT |
357 | |
358 | sb->s_magic = AFFS_SUPER_MAGIC; | |
359 | sb->s_op = &affs_sops; | |
1751e8a6 | 360 | sb->s_flags |= SB_NODIRATIME; |
1da177e4 | 361 | |
f8314dc6 | 362 | sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL); |
1da177e4 LT |
363 | if (!sbi) |
364 | return -ENOMEM; | |
74c41429 | 365 | |
1da177e4 | 366 | sb->s_fs_info = sbi; |
a215fef7 | 367 | sbi->sb = sb; |
7d135a5d | 368 | mutex_init(&sbi->s_bmlock); |
29333920 | 369 | spin_lock_init(&sbi->symlink_lock); |
3dd84782 AB |
370 | spin_lock_init(&sbi->work_lock); |
371 | INIT_DELAYED_WORK(&sbi->sb_work, flush_superblock); | |
1da177e4 LT |
372 | |
373 | if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, | |
374 | &blocksize,&sbi->s_prefix, | |
375 | sbi->s_volume, &mount_flags)) { | |
0158de12 | 376 | pr_err("Error parsing options\n"); |
1da177e4 LT |
377 | return -EINVAL; |
378 | } | |
379 | /* N.B. after this point s_prefix must be released */ | |
380 | ||
381 | sbi->s_flags = mount_flags; | |
382 | sbi->s_mode = i; | |
383 | sbi->s_uid = uid; | |
384 | sbi->s_gid = gid; | |
385 | sbi->s_reserved= reserved; | |
386 | ||
387 | /* Get the size of the device in 512-byte blocks. | |
388 | * If we later see that the partition uses bigger | |
389 | * blocks, we will have to change it. | |
390 | */ | |
391 | ||
e852d82a | 392 | size = i_size_read(sb->s_bdev->bd_inode) >> 9; |
9606d9aa | 393 | pr_debug("initial blocksize=%d, #blocks=%d\n", 512, size); |
1da177e4 LT |
394 | |
395 | affs_set_blocksize(sb, PAGE_SIZE); | |
396 | /* Try to find root block. Its location depends on the block size. */ | |
397 | ||
e852d82a PKS |
398 | i = bdev_logical_block_size(sb->s_bdev); |
399 | j = PAGE_SIZE; | |
1da177e4 LT |
400 | if (blocksize > 0) { |
401 | i = j = blocksize; | |
402 | size = size / (blocksize / 512); | |
403 | } | |
e852d82a | 404 | |
1e907f4f | 405 | for (blocksize = i; blocksize <= j; blocksize <<= 1, size >>= 1) { |
1da177e4 LT |
406 | sbi->s_root_block = root_block; |
407 | if (root_block < 0) | |
408 | sbi->s_root_block = (reserved + size - 1) / 2; | |
9606d9aa | 409 | pr_debug("setting blocksize to %d\n", blocksize); |
1da177e4 LT |
410 | affs_set_blocksize(sb, blocksize); |
411 | sbi->s_partition_size = size; | |
412 | ||
413 | /* The root block location that was calculated above is not | |
414 | * correct if the partition size is an odd number of 512- | |
415 | * byte blocks, which will be rounded down to a number of | |
416 | * 1024-byte blocks, and if there were an even number of | |
417 | * reserved blocks. Ideally, all partition checkers should | |
418 | * report the real number of blocks of the real blocksize, | |
419 | * but since this just cannot be done, we have to try to | |
420 | * find the root block anyways. In the above case, it is one | |
421 | * block behind the calculated one. So we check this one, too. | |
422 | */ | |
423 | for (num_bm = 0; num_bm < 2; num_bm++) { | |
9606d9aa | 424 | pr_debug("Dev %s, trying root=%u, bs=%d, " |
1da177e4 LT |
425 | "size=%d, reserved=%d\n", |
426 | sb->s_id, | |
427 | sbi->s_root_block + num_bm, | |
428 | blocksize, size, reserved); | |
429 | root_bh = affs_bread(sb, sbi->s_root_block + num_bm); | |
430 | if (!root_bh) | |
431 | continue; | |
432 | if (!affs_checksum_block(sb, root_bh) && | |
433 | be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT && | |
434 | be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) { | |
435 | sbi->s_hashsize = blocksize / 4 - 56; | |
436 | sbi->s_root_block += num_bm; | |
1da177e4 LT |
437 | goto got_root; |
438 | } | |
439 | affs_brelse(root_bh); | |
440 | root_bh = NULL; | |
441 | } | |
442 | } | |
443 | if (!silent) | |
0158de12 | 444 | pr_err("No valid root block on device %s\n", sb->s_id); |
842a859d | 445 | return -EINVAL; |
1da177e4 LT |
446 | |
447 | /* N.B. after this point bh must be released */ | |
448 | got_root: | |
842a859d AV |
449 | /* Keep super block in cache */ |
450 | sbi->s_root_bh = root_bh; | |
1da177e4 LT |
451 | root_block = sbi->s_root_block; |
452 | ||
453 | /* Find out which kind of FS we have */ | |
454 | boot_bh = sb_bread(sb, 0); | |
455 | if (!boot_bh) { | |
0158de12 | 456 | pr_err("Cannot read boot block\n"); |
842a859d | 457 | return -EINVAL; |
1da177e4 | 458 | } |
2b943cf0 | 459 | memcpy(sig, boot_bh->b_data, 4); |
1da177e4 | 460 | brelse(boot_bh); |
2b943cf0 | 461 | chksum = be32_to_cpu(*(__be32 *)sig); |
1da177e4 LT |
462 | |
463 | /* Dircache filesystems are compatible with non-dircache ones | |
464 | * when reading. As long as they aren't supported, writing is | |
465 | * not recommended. | |
466 | */ | |
467 | if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS | |
bc98a42c | 468 | || chksum == MUFS_DCOFS) && !sb_rdonly(sb)) { |
0158de12 | 469 | pr_notice("Dircache FS - mounting %s read only\n", sb->s_id); |
1751e8a6 | 470 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
471 | } |
472 | switch (chksum) { | |
0445f01a FF |
473 | case MUFS_FS: |
474 | case MUFS_INTLFFS: | |
475 | case MUFS_DCFFS: | |
34f24835 | 476 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0445f01a FF |
477 | /* fall thru */ |
478 | case FS_INTLFFS: | |
479 | case FS_DCFFS: | |
34f24835 | 480 | affs_set_opt(sbi->s_flags, SF_INTL); |
0445f01a FF |
481 | break; |
482 | case MUFS_FFS: | |
34f24835 | 483 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0445f01a FF |
484 | break; |
485 | case FS_FFS: | |
486 | break; | |
487 | case MUFS_OFS: | |
34f24835 | 488 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0445f01a FF |
489 | /* fall thru */ |
490 | case FS_OFS: | |
34f24835 | 491 | affs_set_opt(sbi->s_flags, SF_OFS); |
1751e8a6 | 492 | sb->s_flags |= SB_NOEXEC; |
0445f01a FF |
493 | break; |
494 | case MUFS_DCOFS: | |
495 | case MUFS_INTLOFS: | |
34f24835 | 496 | affs_set_opt(sbi->s_flags, SF_MUFS); |
0445f01a FF |
497 | case FS_DCOFS: |
498 | case FS_INTLOFS: | |
34f24835 FF |
499 | affs_set_opt(sbi->s_flags, SF_INTL); |
500 | affs_set_opt(sbi->s_flags, SF_OFS); | |
1751e8a6 | 501 | sb->s_flags |= SB_NOEXEC; |
0445f01a FF |
502 | break; |
503 | default: | |
504 | pr_err("Unknown filesystem on device %s: %08X\n", | |
505 | sb->s_id, chksum); | |
506 | return -EINVAL; | |
1da177e4 LT |
507 | } |
508 | ||
79bda4d5 | 509 | if (affs_test_opt(mount_flags, SF_VERBOSE)) { |
2b943cf0 | 510 | u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0]; |
0158de12 | 511 | pr_notice("Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n", |
2b943cf0 | 512 | len > 31 ? 31 : len, |
1da177e4 | 513 | AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1, |
2b943cf0 | 514 | sig, sig[3] + '0', blocksize); |
1da177e4 LT |
515 | } |
516 | ||
1751e8a6 | 517 | sb->s_flags |= SB_NODEV | SB_NOSUID; |
1da177e4 LT |
518 | |
519 | sbi->s_data_blksize = sb->s_blocksize; | |
79bda4d5 | 520 | if (affs_test_opt(sbi->s_flags, SF_OFS)) |
1da177e4 LT |
521 | sbi->s_data_blksize -= 24; |
522 | ||
1da177e4 | 523 | tmp_flags = sb->s_flags; |
842a859d AV |
524 | ret = affs_init_bitmap(sb, &tmp_flags); |
525 | if (ret) | |
526 | return ret; | |
1da177e4 LT |
527 | sb->s_flags = tmp_flags; |
528 | ||
529 | /* set up enough so that it can read an inode */ | |
530 | ||
210f8559 | 531 | root_inode = affs_iget(sb, root_block); |
842a859d AV |
532 | if (IS_ERR(root_inode)) |
533 | return PTR_ERR(root_inode); | |
210f8559 | 534 | |
79bda4d5 | 535 | if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_INTL)) |
a129880d AV |
536 | sb->s_d_op = &affs_intl_dentry_operations; |
537 | else | |
538 | sb->s_d_op = &affs_dentry_operations; | |
539 | ||
48fde701 | 540 | sb->s_root = d_make_root(root_inode); |
1da177e4 | 541 | if (!sb->s_root) { |
0158de12 | 542 | pr_err("AFFS: Get root inode failed\n"); |
842a859d | 543 | return -ENOMEM; |
1da177e4 | 544 | } |
1da177e4 | 545 | |
ed4433d7 | 546 | sb->s_export_op = &affs_export_ops; |
9606d9aa | 547 | pr_debug("s_flags=%lX\n", sb->s_flags); |
1da177e4 | 548 | return 0; |
1da177e4 LT |
549 | } |
550 | ||
551 | static int | |
552 | affs_remount(struct super_block *sb, int *flags, char *data) | |
553 | { | |
554 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
555 | int blocksize; | |
8fed10be EB |
556 | kuid_t uid; |
557 | kgid_t gid; | |
1da177e4 LT |
558 | int mode; |
559 | int reserved; | |
560 | int root_block; | |
561 | unsigned long mount_flags; | |
562 | int res = 0; | |
c8f33d0b | 563 | char *new_opts; |
29333920 AV |
564 | char volume[32]; |
565 | char *prefix = NULL; | |
1da177e4 | 566 | |
c8f33d0b | 567 | new_opts = kstrdup(data, GFP_KERNEL); |
01d6e087 | 568 | if (data && !new_opts) |
c8f33d0b SK |
569 | return -ENOMEM; |
570 | ||
9606d9aa | 571 | pr_debug("%s(flags=0x%x,opts=\"%s\")\n", __func__, *flags, data); |
1da177e4 | 572 | |
02b9984d | 573 | sync_filesystem(sb); |
1751e8a6 | 574 | *flags |= SB_NODIRATIME; |
1da177e4 | 575 | |
29333920 | 576 | memcpy(volume, sbi->s_volume, 32); |
e9b3961b | 577 | if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block, |
29333920 | 578 | &blocksize, &prefix, volume, |
e9b3961b | 579 | &mount_flags)) { |
29333920 | 580 | kfree(prefix); |
e9b3961b | 581 | kfree(new_opts); |
1da177e4 | 582 | return -EINVAL; |
e9b3961b | 583 | } |
74c41429 | 584 | |
43829731 | 585 | flush_delayed_work(&sbi->sb_work); |
e9b3961b | 586 | |
1da177e4 LT |
587 | sbi->s_flags = mount_flags; |
588 | sbi->s_mode = mode; | |
589 | sbi->s_uid = uid; | |
590 | sbi->s_gid = gid; | |
29333920 AV |
591 | /* protect against readers */ |
592 | spin_lock(&sbi->symlink_lock); | |
593 | if (prefix) { | |
594 | kfree(sbi->s_prefix); | |
595 | sbi->s_prefix = prefix; | |
596 | } | |
597 | memcpy(sbi->s_volume, volume, 32); | |
598 | spin_unlock(&sbi->symlink_lock); | |
1da177e4 | 599 | |
1751e8a6 | 600 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
1da177e4 | 601 | return 0; |
74c41429 | 602 | |
1751e8a6 | 603 | if (*flags & SB_RDONLY) |
1da177e4 | 604 | affs_free_bitmap(sb); |
0164b1a3 | 605 | else |
1da177e4 LT |
606 | res = affs_init_bitmap(sb, flags); |
607 | ||
608 | return res; | |
609 | } | |
610 | ||
611 | static int | |
726c3342 | 612 | affs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 613 | { |
726c3342 | 614 | struct super_block *sb = dentry->d_sb; |
1da177e4 | 615 | int free; |
a6a2a73c | 616 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4 | 617 | |
9606d9aa FF |
618 | pr_debug("%s() partsize=%d, reserved=%d\n", |
619 | __func__, AFFS_SB(sb)->s_partition_size, | |
620 | AFFS_SB(sb)->s_reserved); | |
1da177e4 LT |
621 | |
622 | free = affs_count_free_blocks(sb); | |
623 | buf->f_type = AFFS_SUPER_MAGIC; | |
624 | buf->f_bsize = sb->s_blocksize; | |
625 | buf->f_blocks = AFFS_SB(sb)->s_partition_size - AFFS_SB(sb)->s_reserved; | |
626 | buf->f_bfree = free; | |
627 | buf->f_bavail = free; | |
a6a2a73c CL |
628 | buf->f_fsid.val[0] = (u32)id; |
629 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
f157853e | 630 | buf->f_namelen = AFFSNAMEMAX; |
1da177e4 LT |
631 | return 0; |
632 | } | |
633 | ||
152a0836 AV |
634 | static struct dentry *affs_mount(struct file_system_type *fs_type, |
635 | int flags, const char *dev_name, void *data) | |
1da177e4 | 636 | { |
152a0836 | 637 | return mount_bdev(fs_type, flags, dev_name, data, affs_fill_super); |
1da177e4 LT |
638 | } |
639 | ||
842a859d AV |
640 | static void affs_kill_sb(struct super_block *sb) |
641 | { | |
642 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
643 | kill_block_super(sb); | |
644 | if (sbi) { | |
645 | affs_free_bitmap(sb); | |
646 | affs_brelse(sbi->s_root_bh); | |
647 | kfree(sbi->s_prefix); | |
4d29e571 | 648 | mutex_destroy(&sbi->s_bmlock); |
842a859d AV |
649 | kfree(sbi); |
650 | } | |
651 | } | |
652 | ||
1da177e4 LT |
653 | static struct file_system_type affs_fs_type = { |
654 | .owner = THIS_MODULE, | |
655 | .name = "affs", | |
152a0836 | 656 | .mount = affs_mount, |
842a859d | 657 | .kill_sb = affs_kill_sb, |
1da177e4 LT |
658 | .fs_flags = FS_REQUIRES_DEV, |
659 | }; | |
7f78e035 | 660 | MODULE_ALIAS_FS("affs"); |
1da177e4 LT |
661 | |
662 | static int __init init_affs_fs(void) | |
663 | { | |
664 | int err = init_inodecache(); | |
665 | if (err) | |
666 | goto out1; | |
667 | err = register_filesystem(&affs_fs_type); | |
668 | if (err) | |
669 | goto out; | |
670 | return 0; | |
671 | out: | |
672 | destroy_inodecache(); | |
673 | out1: | |
674 | return err; | |
675 | } | |
676 | ||
677 | static void __exit exit_affs_fs(void) | |
678 | { | |
679 | unregister_filesystem(&affs_fs_type); | |
680 | destroy_inodecache(); | |
681 | } | |
682 | ||
683 | MODULE_DESCRIPTION("Amiga filesystem support for Linux"); | |
684 | MODULE_LICENSE("GPL"); | |
685 | ||
686 | module_init(init_affs_fs) | |
687 | module_exit(exit_affs_fs) |