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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> |
1da177e4 LT |
19 | #include "affs.h" |
20 | ||
21 | extern struct timezone sys_tz; | |
22 | ||
726c3342 | 23 | static int affs_statfs(struct dentry *dentry, struct kstatfs *buf); |
1da177e4 LT |
24 | static int affs_remount (struct super_block *sb, int *flags, char *data); |
25 | ||
26 | static void | |
27 | affs_put_super(struct super_block *sb) | |
28 | { | |
29 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
30 | pr_debug("AFFS: put_super()\n"); | |
31 | ||
32 | if (!(sb->s_flags & MS_RDONLY)) { | |
33 | AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(1); | |
34 | secs_to_datestamp(get_seconds(), | |
35 | &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change); | |
36 | affs_fix_checksum(sb, sbi->s_root_bh); | |
37 | mark_buffer_dirty(sbi->s_root_bh); | |
38 | } | |
39 | ||
f99d49ad | 40 | kfree(sbi->s_prefix); |
1da177e4 LT |
41 | affs_free_bitmap(sb); |
42 | affs_brelse(sbi->s_root_bh); | |
43 | kfree(sbi); | |
44 | sb->s_fs_info = NULL; | |
45 | return; | |
46 | } | |
47 | ||
48 | static void | |
49 | affs_write_super(struct super_block *sb) | |
50 | { | |
51 | int clean = 2; | |
52 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
53 | ||
54 | if (!(sb->s_flags & MS_RDONLY)) { | |
55 | // if (sbi->s_bitmap[i].bm_bh) { | |
56 | // if (buffer_dirty(sbi->s_bitmap[i].bm_bh)) { | |
57 | // clean = 0; | |
58 | AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(clean); | |
59 | secs_to_datestamp(get_seconds(), | |
60 | &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change); | |
61 | affs_fix_checksum(sb, sbi->s_root_bh); | |
62 | mark_buffer_dirty(sbi->s_root_bh); | |
63 | sb->s_dirt = !clean; /* redo until bitmap synced */ | |
64 | } else | |
65 | sb->s_dirt = 0; | |
66 | ||
67 | pr_debug("AFFS: write_super() at %lu, clean=%d\n", get_seconds(), clean); | |
68 | } | |
69 | ||
e18b890b | 70 | static struct kmem_cache * affs_inode_cachep; |
1da177e4 LT |
71 | |
72 | static struct inode *affs_alloc_inode(struct super_block *sb) | |
73 | { | |
dca3c336 RZ |
74 | struct affs_inode_info *i; |
75 | ||
76 | i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL); | |
77 | if (!i) | |
1da177e4 | 78 | return NULL; |
dca3c336 RZ |
79 | |
80 | i->vfs_inode.i_version = 1; | |
81 | i->i_lc = NULL; | |
82 | i->i_ext_bh = NULL; | |
83 | i->i_pa_cnt = 0; | |
84 | ||
85 | return &i->vfs_inode; | |
1da177e4 LT |
86 | } |
87 | ||
88 | static void affs_destroy_inode(struct inode *inode) | |
89 | { | |
90 | kmem_cache_free(affs_inode_cachep, AFFS_I(inode)); | |
91 | } | |
92 | ||
51cc5068 | 93 | static void init_once(void *foo) |
1da177e4 LT |
94 | { |
95 | struct affs_inode_info *ei = (struct affs_inode_info *) foo; | |
96 | ||
a35afb83 CL |
97 | init_MUTEX(&ei->i_link_lock); |
98 | init_MUTEX(&ei->i_ext_lock); | |
99 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
100 | } |
101 | ||
102 | static int init_inodecache(void) | |
103 | { | |
104 | affs_inode_cachep = kmem_cache_create("affs_inode_cache", | |
105 | sizeof(struct affs_inode_info), | |
fffb60f9 PJ |
106 | 0, (SLAB_RECLAIM_ACCOUNT| |
107 | SLAB_MEM_SPREAD), | |
20c2df83 | 108 | init_once); |
1da177e4 LT |
109 | if (affs_inode_cachep == NULL) |
110 | return -ENOMEM; | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static void destroy_inodecache(void) | |
115 | { | |
1a1d92c1 | 116 | kmem_cache_destroy(affs_inode_cachep); |
1da177e4 LT |
117 | } |
118 | ||
ee9b6d61 | 119 | static const struct super_operations affs_sops = { |
1da177e4 LT |
120 | .alloc_inode = affs_alloc_inode, |
121 | .destroy_inode = affs_destroy_inode, | |
1da177e4 | 122 | .write_inode = affs_write_inode, |
1da177e4 LT |
123 | .delete_inode = affs_delete_inode, |
124 | .clear_inode = affs_clear_inode, | |
125 | .put_super = affs_put_super, | |
126 | .write_super = affs_write_super, | |
127 | .statfs = affs_statfs, | |
128 | .remount_fs = affs_remount, | |
e9b3961b | 129 | .show_options = generic_show_options, |
1da177e4 LT |
130 | }; |
131 | ||
132 | enum { | |
133 | Opt_bs, Opt_mode, Opt_mufs, Opt_prefix, Opt_protect, | |
134 | Opt_reserved, Opt_root, Opt_setgid, Opt_setuid, | |
135 | Opt_verbose, Opt_volume, Opt_ignore, Opt_err, | |
136 | }; | |
137 | ||
a447c093 | 138 | static const match_table_t tokens = { |
1da177e4 LT |
139 | {Opt_bs, "bs=%u"}, |
140 | {Opt_mode, "mode=%o"}, | |
141 | {Opt_mufs, "mufs"}, | |
142 | {Opt_prefix, "prefix=%s"}, | |
143 | {Opt_protect, "protect"}, | |
144 | {Opt_reserved, "reserved=%u"}, | |
145 | {Opt_root, "root=%u"}, | |
146 | {Opt_setgid, "setgid=%u"}, | |
147 | {Opt_setuid, "setuid=%u"}, | |
148 | {Opt_verbose, "verbose"}, | |
149 | {Opt_volume, "volume=%s"}, | |
150 | {Opt_ignore, "grpquota"}, | |
151 | {Opt_ignore, "noquota"}, | |
152 | {Opt_ignore, "quota"}, | |
153 | {Opt_ignore, "usrquota"}, | |
154 | {Opt_err, NULL}, | |
155 | }; | |
156 | ||
157 | static int | |
158 | parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s32 *root, | |
159 | int *blocksize, char **prefix, char *volume, unsigned long *mount_opts) | |
160 | { | |
161 | char *p; | |
162 | substring_t args[MAX_OPT_ARGS]; | |
163 | ||
164 | /* Fill in defaults */ | |
165 | ||
21559981 DH |
166 | *uid = current_uid(); |
167 | *gid = current_gid(); | |
1da177e4 LT |
168 | *reserved = 2; |
169 | *root = -1; | |
170 | *blocksize = -1; | |
171 | volume[0] = ':'; | |
172 | volume[1] = 0; | |
173 | *mount_opts = 0; | |
174 | if (!options) | |
175 | return 1; | |
176 | ||
177 | while ((p = strsep(&options, ",")) != NULL) { | |
178 | int token, n, option; | |
179 | if (!*p) | |
180 | continue; | |
181 | ||
182 | token = match_token(p, tokens, args); | |
183 | switch (token) { | |
184 | case Opt_bs: | |
185 | if (match_int(&args[0], &n)) | |
186 | return -EINVAL; | |
187 | if (n != 512 && n != 1024 && n != 2048 | |
188 | && n != 4096) { | |
189 | printk ("AFFS: Invalid blocksize (512, 1024, 2048, 4096 allowed)\n"); | |
190 | return 0; | |
191 | } | |
192 | *blocksize = n; | |
193 | break; | |
194 | case Opt_mode: | |
195 | if (match_octal(&args[0], &option)) | |
196 | return 1; | |
197 | *mode = option & 0777; | |
198 | *mount_opts |= SF_SETMODE; | |
199 | break; | |
200 | case Opt_mufs: | |
201 | *mount_opts |= SF_MUFS; | |
202 | break; | |
203 | case Opt_prefix: | |
f99d49ad JJ |
204 | /* Free any previous prefix */ |
205 | kfree(*prefix); | |
1da177e4 LT |
206 | *prefix = match_strdup(&args[0]); |
207 | if (!*prefix) | |
208 | return 0; | |
209 | *mount_opts |= SF_PREFIX; | |
210 | break; | |
211 | case Opt_protect: | |
212 | *mount_opts |= SF_IMMUTABLE; | |
213 | break; | |
214 | case Opt_reserved: | |
215 | if (match_int(&args[0], reserved)) | |
216 | return 1; | |
217 | break; | |
218 | case Opt_root: | |
219 | if (match_int(&args[0], root)) | |
220 | return 1; | |
221 | break; | |
222 | case Opt_setgid: | |
223 | if (match_int(&args[0], &option)) | |
224 | return 1; | |
225 | *gid = option; | |
226 | *mount_opts |= SF_SETGID; | |
227 | break; | |
228 | case Opt_setuid: | |
229 | if (match_int(&args[0], &option)) | |
230 | return -EINVAL; | |
231 | *uid = option; | |
232 | *mount_opts |= SF_SETUID; | |
233 | break; | |
234 | case Opt_verbose: | |
235 | *mount_opts |= SF_VERBOSE; | |
236 | break; | |
237 | case Opt_volume: { | |
238 | char *vol = match_strdup(&args[0]); | |
6db27dd9 JM |
239 | if (!vol) |
240 | return 0; | |
1da177e4 LT |
241 | strlcpy(volume, vol, 32); |
242 | kfree(vol); | |
243 | break; | |
244 | } | |
245 | case Opt_ignore: | |
246 | /* Silently ignore the quota options */ | |
247 | break; | |
248 | default: | |
249 | printk("AFFS: Unrecognized mount option \"%s\" " | |
250 | "or missing value\n", p); | |
251 | return 0; | |
252 | } | |
253 | } | |
254 | return 1; | |
255 | } | |
256 | ||
257 | /* This function definitely needs to be split up. Some fine day I'll | |
258 | * hopefully have the guts to do so. Until then: sorry for the mess. | |
259 | */ | |
260 | ||
261 | static int affs_fill_super(struct super_block *sb, void *data, int silent) | |
262 | { | |
263 | struct affs_sb_info *sbi; | |
264 | struct buffer_head *root_bh = NULL; | |
265 | struct buffer_head *boot_bh; | |
266 | struct inode *root_inode = NULL; | |
267 | s32 root_block; | |
268 | int size, blocksize; | |
269 | u32 chksum; | |
270 | int num_bm; | |
271 | int i, j; | |
272 | s32 key; | |
273 | uid_t uid; | |
274 | gid_t gid; | |
275 | int reserved; | |
276 | unsigned long mount_flags; | |
277 | int tmp_flags; /* fix remount prototype... */ | |
2b943cf0 | 278 | u8 sig[4]; |
210f8559 | 279 | int ret = -EINVAL; |
1da177e4 | 280 | |
e9b3961b MS |
281 | save_mount_options(sb, data); |
282 | ||
1da177e4 LT |
283 | pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options"); |
284 | ||
285 | sb->s_magic = AFFS_SUPER_MAGIC; | |
286 | sb->s_op = &affs_sops; | |
287 | sb->s_flags |= MS_NODIRATIME; | |
288 | ||
f8314dc6 | 289 | sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL); |
1da177e4 LT |
290 | if (!sbi) |
291 | return -ENOMEM; | |
292 | sb->s_fs_info = sbi; | |
7d135a5d | 293 | mutex_init(&sbi->s_bmlock); |
1da177e4 LT |
294 | |
295 | if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, | |
296 | &blocksize,&sbi->s_prefix, | |
297 | sbi->s_volume, &mount_flags)) { | |
298 | printk(KERN_ERR "AFFS: Error parsing options\n"); | |
299 | return -EINVAL; | |
300 | } | |
301 | /* N.B. after this point s_prefix must be released */ | |
302 | ||
303 | sbi->s_flags = mount_flags; | |
304 | sbi->s_mode = i; | |
305 | sbi->s_uid = uid; | |
306 | sbi->s_gid = gid; | |
307 | sbi->s_reserved= reserved; | |
308 | ||
309 | /* Get the size of the device in 512-byte blocks. | |
310 | * If we later see that the partition uses bigger | |
311 | * blocks, we will have to change it. | |
312 | */ | |
313 | ||
314 | size = sb->s_bdev->bd_inode->i_size >> 9; | |
315 | pr_debug("AFFS: initial blocksize=%d, #blocks=%d\n", 512, size); | |
316 | ||
317 | affs_set_blocksize(sb, PAGE_SIZE); | |
318 | /* Try to find root block. Its location depends on the block size. */ | |
319 | ||
320 | i = 512; | |
321 | j = 4096; | |
322 | if (blocksize > 0) { | |
323 | i = j = blocksize; | |
324 | size = size / (blocksize / 512); | |
325 | } | |
326 | for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) { | |
327 | sbi->s_root_block = root_block; | |
328 | if (root_block < 0) | |
329 | sbi->s_root_block = (reserved + size - 1) / 2; | |
330 | pr_debug("AFFS: setting blocksize to %d\n", blocksize); | |
331 | affs_set_blocksize(sb, blocksize); | |
332 | sbi->s_partition_size = size; | |
333 | ||
334 | /* The root block location that was calculated above is not | |
335 | * correct if the partition size is an odd number of 512- | |
336 | * byte blocks, which will be rounded down to a number of | |
337 | * 1024-byte blocks, and if there were an even number of | |
338 | * reserved blocks. Ideally, all partition checkers should | |
339 | * report the real number of blocks of the real blocksize, | |
340 | * but since this just cannot be done, we have to try to | |
341 | * find the root block anyways. In the above case, it is one | |
342 | * block behind the calculated one. So we check this one, too. | |
343 | */ | |
344 | for (num_bm = 0; num_bm < 2; num_bm++) { | |
345 | pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, " | |
346 | "size=%d, reserved=%d\n", | |
347 | sb->s_id, | |
348 | sbi->s_root_block + num_bm, | |
349 | blocksize, size, reserved); | |
350 | root_bh = affs_bread(sb, sbi->s_root_block + num_bm); | |
351 | if (!root_bh) | |
352 | continue; | |
353 | if (!affs_checksum_block(sb, root_bh) && | |
354 | be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT && | |
355 | be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) { | |
356 | sbi->s_hashsize = blocksize / 4 - 56; | |
357 | sbi->s_root_block += num_bm; | |
358 | key = 1; | |
359 | goto got_root; | |
360 | } | |
361 | affs_brelse(root_bh); | |
362 | root_bh = NULL; | |
363 | } | |
364 | } | |
365 | if (!silent) | |
366 | printk(KERN_ERR "AFFS: No valid root block on device %s\n", | |
367 | sb->s_id); | |
368 | goto out_error; | |
369 | ||
370 | /* N.B. after this point bh must be released */ | |
371 | got_root: | |
372 | root_block = sbi->s_root_block; | |
373 | ||
374 | /* Find out which kind of FS we have */ | |
375 | boot_bh = sb_bread(sb, 0); | |
376 | if (!boot_bh) { | |
377 | printk(KERN_ERR "AFFS: Cannot read boot block\n"); | |
378 | goto out_error; | |
379 | } | |
2b943cf0 | 380 | memcpy(sig, boot_bh->b_data, 4); |
1da177e4 | 381 | brelse(boot_bh); |
2b943cf0 | 382 | chksum = be32_to_cpu(*(__be32 *)sig); |
1da177e4 LT |
383 | |
384 | /* Dircache filesystems are compatible with non-dircache ones | |
385 | * when reading. As long as they aren't supported, writing is | |
386 | * not recommended. | |
387 | */ | |
388 | if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS | |
389 | || chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) { | |
390 | printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n", | |
391 | sb->s_id); | |
392 | sb->s_flags |= MS_RDONLY; | |
393 | } | |
394 | switch (chksum) { | |
395 | case MUFS_FS: | |
396 | case MUFS_INTLFFS: | |
397 | case MUFS_DCFFS: | |
398 | sbi->s_flags |= SF_MUFS; | |
399 | /* fall thru */ | |
400 | case FS_INTLFFS: | |
401 | case FS_DCFFS: | |
402 | sbi->s_flags |= SF_INTL; | |
403 | break; | |
404 | case MUFS_FFS: | |
405 | sbi->s_flags |= SF_MUFS; | |
406 | break; | |
407 | case FS_FFS: | |
408 | break; | |
409 | case MUFS_OFS: | |
410 | sbi->s_flags |= SF_MUFS; | |
411 | /* fall thru */ | |
412 | case FS_OFS: | |
413 | sbi->s_flags |= SF_OFS; | |
414 | sb->s_flags |= MS_NOEXEC; | |
415 | break; | |
416 | case MUFS_DCOFS: | |
417 | case MUFS_INTLOFS: | |
418 | sbi->s_flags |= SF_MUFS; | |
419 | case FS_DCOFS: | |
420 | case FS_INTLOFS: | |
421 | sbi->s_flags |= SF_INTL | SF_OFS; | |
422 | sb->s_flags |= MS_NOEXEC; | |
423 | break; | |
424 | default: | |
425 | printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n", | |
426 | sb->s_id, chksum); | |
427 | goto out_error; | |
428 | } | |
429 | ||
430 | if (mount_flags & SF_VERBOSE) { | |
2b943cf0 AV |
431 | u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0]; |
432 | printk(KERN_NOTICE "AFFS: Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n", | |
433 | len > 31 ? 31 : len, | |
1da177e4 | 434 | AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1, |
2b943cf0 | 435 | sig, sig[3] + '0', blocksize); |
1da177e4 LT |
436 | } |
437 | ||
438 | sb->s_flags |= MS_NODEV | MS_NOSUID; | |
439 | ||
440 | sbi->s_data_blksize = sb->s_blocksize; | |
441 | if (sbi->s_flags & SF_OFS) | |
442 | sbi->s_data_blksize -= 24; | |
443 | ||
444 | /* Keep super block in cache */ | |
445 | sbi->s_root_bh = root_bh; | |
446 | /* N.B. after this point s_root_bh must be released */ | |
447 | ||
448 | tmp_flags = sb->s_flags; | |
449 | if (affs_init_bitmap(sb, &tmp_flags)) | |
450 | goto out_error; | |
451 | sb->s_flags = tmp_flags; | |
452 | ||
453 | /* set up enough so that it can read an inode */ | |
454 | ||
210f8559 DH |
455 | root_inode = affs_iget(sb, root_block); |
456 | if (IS_ERR(root_inode)) { | |
457 | ret = PTR_ERR(root_inode); | |
458 | goto out_error_noinode; | |
459 | } | |
460 | ||
1da177e4 LT |
461 | sb->s_root = d_alloc_root(root_inode); |
462 | if (!sb->s_root) { | |
463 | printk(KERN_ERR "AFFS: Get root inode failed\n"); | |
464 | goto out_error; | |
465 | } | |
466 | sb->s_root->d_op = &affs_dentry_operations; | |
467 | ||
468 | pr_debug("AFFS: s_flags=%lX\n",sb->s_flags); | |
469 | return 0; | |
470 | ||
471 | /* | |
472 | * Begin the cascaded cleanup ... | |
473 | */ | |
474 | out_error: | |
475 | if (root_inode) | |
476 | iput(root_inode); | |
210f8559 | 477 | out_error_noinode: |
f99d49ad | 478 | kfree(sbi->s_bitmap); |
1da177e4 | 479 | affs_brelse(root_bh); |
f99d49ad | 480 | kfree(sbi->s_prefix); |
1da177e4 LT |
481 | kfree(sbi); |
482 | sb->s_fs_info = NULL; | |
210f8559 | 483 | return ret; |
1da177e4 LT |
484 | } |
485 | ||
486 | static int | |
487 | affs_remount(struct super_block *sb, int *flags, char *data) | |
488 | { | |
489 | struct affs_sb_info *sbi = AFFS_SB(sb); | |
490 | int blocksize; | |
491 | uid_t uid; | |
492 | gid_t gid; | |
493 | int mode; | |
494 | int reserved; | |
495 | int root_block; | |
496 | unsigned long mount_flags; | |
497 | int res = 0; | |
e9b3961b | 498 | char *new_opts = kstrdup(data, GFP_KERNEL); |
1da177e4 LT |
499 | |
500 | pr_debug("AFFS: remount(flags=0x%x,opts=\"%s\")\n",*flags,data); | |
501 | ||
502 | *flags |= MS_NODIRATIME; | |
503 | ||
e9b3961b MS |
504 | if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block, |
505 | &blocksize, &sbi->s_prefix, sbi->s_volume, | |
506 | &mount_flags)) { | |
507 | kfree(new_opts); | |
1da177e4 | 508 | return -EINVAL; |
e9b3961b MS |
509 | } |
510 | kfree(sb->s_options); | |
511 | sb->s_options = new_opts; | |
512 | ||
1da177e4 LT |
513 | sbi->s_flags = mount_flags; |
514 | sbi->s_mode = mode; | |
515 | sbi->s_uid = uid; | |
516 | sbi->s_gid = gid; | |
517 | ||
518 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
519 | return 0; | |
520 | if (*flags & MS_RDONLY) { | |
521 | sb->s_dirt = 1; | |
522 | while (sb->s_dirt) | |
523 | affs_write_super(sb); | |
524 | affs_free_bitmap(sb); | |
525 | } else | |
526 | res = affs_init_bitmap(sb, flags); | |
527 | ||
528 | return res; | |
529 | } | |
530 | ||
531 | static int | |
726c3342 | 532 | affs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 533 | { |
726c3342 | 534 | struct super_block *sb = dentry->d_sb; |
1da177e4 LT |
535 | int free; |
536 | ||
537 | pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size, | |
538 | AFFS_SB(sb)->s_reserved); | |
539 | ||
540 | free = affs_count_free_blocks(sb); | |
541 | buf->f_type = AFFS_SUPER_MAGIC; | |
542 | buf->f_bsize = sb->s_blocksize; | |
543 | buf->f_blocks = AFFS_SB(sb)->s_partition_size - AFFS_SB(sb)->s_reserved; | |
544 | buf->f_bfree = free; | |
545 | buf->f_bavail = free; | |
546 | return 0; | |
547 | } | |
548 | ||
454e2398 DH |
549 | static int affs_get_sb(struct file_system_type *fs_type, |
550 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 551 | { |
454e2398 DH |
552 | return get_sb_bdev(fs_type, flags, dev_name, data, affs_fill_super, |
553 | mnt); | |
1da177e4 LT |
554 | } |
555 | ||
556 | static struct file_system_type affs_fs_type = { | |
557 | .owner = THIS_MODULE, | |
558 | .name = "affs", | |
559 | .get_sb = affs_get_sb, | |
560 | .kill_sb = kill_block_super, | |
561 | .fs_flags = FS_REQUIRES_DEV, | |
562 | }; | |
563 | ||
564 | static int __init init_affs_fs(void) | |
565 | { | |
566 | int err = init_inodecache(); | |
567 | if (err) | |
568 | goto out1; | |
569 | err = register_filesystem(&affs_fs_type); | |
570 | if (err) | |
571 | goto out; | |
572 | return 0; | |
573 | out: | |
574 | destroy_inodecache(); | |
575 | out1: | |
576 | return err; | |
577 | } | |
578 | ||
579 | static void __exit exit_affs_fs(void) | |
580 | { | |
581 | unregister_filesystem(&affs_fs_type); | |
582 | destroy_inodecache(); | |
583 | } | |
584 | ||
585 | MODULE_DESCRIPTION("Amiga filesystem support for Linux"); | |
586 | MODULE_LICENSE("GPL"); | |
587 | ||
588 | module_init(init_affs_fs) | |
589 | module_exit(exit_affs_fs) |