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