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Commit | Line | Data |
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555e3775 BC |
1 | /* |
2 | * Optimized MPEG FS - inode and super operations. | |
3 | * Copyright (C) 2006 Bob Copeland <me@bobcopeland.com> | |
4 | * Released under GPL v2. | |
5 | */ | |
555e3775 BC |
6 | #include <linux/module.h> |
7 | #include <linux/sched.h> | |
5a0e3ad6 | 8 | #include <linux/slab.h> |
555e3775 BC |
9 | #include <linux/fs.h> |
10 | #include <linux/vfs.h> | |
11 | #include <linux/parser.h> | |
12 | #include <linux/buffer_head.h> | |
13 | #include <linux/vmalloc.h> | |
a9185b41 | 14 | #include <linux/writeback.h> |
555e3775 BC |
15 | #include <linux/crc-itu-t.h> |
16 | #include "omfs.h" | |
17 | ||
18 | MODULE_AUTHOR("Bob Copeland <me@bobcopeland.com>"); | |
19 | MODULE_DESCRIPTION("OMFS (ReplayTV/Karma) Filesystem for Linux"); | |
20 | MODULE_LICENSE("GPL"); | |
21 | ||
f068272c BC |
22 | struct buffer_head *omfs_bread(struct super_block *sb, sector_t block) |
23 | { | |
24 | struct omfs_sb_info *sbi = OMFS_SB(sb); | |
25 | if (block >= sbi->s_num_blocks) | |
26 | return NULL; | |
27 | ||
28 | return sb_bread(sb, clus_to_blk(sbi, block)); | |
29 | } | |
30 | ||
555e3775 BC |
31 | struct inode *omfs_new_inode(struct inode *dir, int mode) |
32 | { | |
33 | struct inode *inode; | |
34 | u64 new_block; | |
35 | int err; | |
36 | int len; | |
37 | struct omfs_sb_info *sbi = OMFS_SB(dir->i_sb); | |
38 | ||
39 | inode = new_inode(dir->i_sb); | |
40 | if (!inode) | |
41 | return ERR_PTR(-ENOMEM); | |
42 | ||
43 | err = omfs_allocate_range(dir->i_sb, sbi->s_mirrors, sbi->s_mirrors, | |
44 | &new_block, &len); | |
45 | if (err) | |
46 | goto fail; | |
47 | ||
48 | inode->i_ino = new_block; | |
6a9e652c | 49 | inode_init_owner(inode, NULL, mode); |
555e3775 BC |
50 | inode->i_mapping->a_ops = &omfs_aops; |
51 | ||
52 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
53 | switch (mode & S_IFMT) { | |
54 | case S_IFDIR: | |
55 | inode->i_op = &omfs_dir_inops; | |
56 | inode->i_fop = &omfs_dir_operations; | |
57 | inode->i_size = sbi->s_sys_blocksize; | |
58 | inc_nlink(inode); | |
59 | break; | |
60 | case S_IFREG: | |
61 | inode->i_op = &omfs_file_inops; | |
62 | inode->i_fop = &omfs_file_operations; | |
63 | inode->i_size = 0; | |
64 | break; | |
65 | } | |
66 | ||
67 | insert_inode_hash(inode); | |
68 | mark_inode_dirty(inode); | |
69 | return inode; | |
70 | fail: | |
71 | make_bad_inode(inode); | |
72 | iput(inode); | |
73 | return ERR_PTR(err); | |
74 | } | |
75 | ||
76 | /* | |
77 | * Update the header checksums for a dirty inode based on its contents. | |
78 | * Caller is expected to hold the buffer head underlying oi and mark it | |
79 | * dirty. | |
80 | */ | |
81 | static void omfs_update_checksums(struct omfs_inode *oi) | |
82 | { | |
83 | int xor, i, ofs = 0, count; | |
84 | u16 crc = 0; | |
85 | unsigned char *ptr = (unsigned char *) oi; | |
86 | ||
87 | count = be32_to_cpu(oi->i_head.h_body_size); | |
88 | ofs = sizeof(struct omfs_header); | |
89 | ||
90 | crc = crc_itu_t(crc, ptr + ofs, count); | |
91 | oi->i_head.h_crc = cpu_to_be16(crc); | |
92 | ||
93 | xor = ptr[0]; | |
94 | for (i = 1; i < OMFS_XOR_COUNT; i++) | |
95 | xor ^= ptr[i]; | |
96 | ||
97 | oi->i_head.h_check_xor = xor; | |
98 | } | |
99 | ||
a9185b41 | 100 | static int __omfs_write_inode(struct inode *inode, int wait) |
555e3775 BC |
101 | { |
102 | struct omfs_inode *oi; | |
103 | struct omfs_sb_info *sbi = OMFS_SB(inode->i_sb); | |
104 | struct buffer_head *bh, *bh2; | |
555e3775 BC |
105 | u64 ctime; |
106 | int i; | |
107 | int ret = -EIO; | |
108 | int sync_failed = 0; | |
109 | ||
110 | /* get current inode since we may have written sibling ptrs etc. */ | |
f068272c | 111 | bh = omfs_bread(inode->i_sb, inode->i_ino); |
555e3775 BC |
112 | if (!bh) |
113 | goto out; | |
114 | ||
115 | oi = (struct omfs_inode *) bh->b_data; | |
116 | ||
117 | oi->i_head.h_self = cpu_to_be64(inode->i_ino); | |
118 | if (S_ISDIR(inode->i_mode)) | |
119 | oi->i_type = OMFS_DIR; | |
120 | else if (S_ISREG(inode->i_mode)) | |
121 | oi->i_type = OMFS_FILE; | |
122 | else { | |
123 | printk(KERN_WARNING "omfs: unknown file type: %d\n", | |
124 | inode->i_mode); | |
125 | goto out_brelse; | |
126 | } | |
127 | ||
128 | oi->i_head.h_body_size = cpu_to_be32(sbi->s_sys_blocksize - | |
129 | sizeof(struct omfs_header)); | |
130 | oi->i_head.h_version = 1; | |
131 | oi->i_head.h_type = OMFS_INODE_NORMAL; | |
132 | oi->i_head.h_magic = OMFS_IMAGIC; | |
133 | oi->i_size = cpu_to_be64(inode->i_size); | |
134 | ||
135 | ctime = inode->i_ctime.tv_sec * 1000LL + | |
136 | ((inode->i_ctime.tv_nsec + 999)/1000); | |
137 | oi->i_ctime = cpu_to_be64(ctime); | |
138 | ||
139 | omfs_update_checksums(oi); | |
140 | ||
141 | mark_buffer_dirty(bh); | |
142 | if (wait) { | |
143 | sync_dirty_buffer(bh); | |
144 | if (buffer_req(bh) && !buffer_uptodate(bh)) | |
145 | sync_failed = 1; | |
146 | } | |
147 | ||
148 | /* if mirroring writes, copy to next fsblock */ | |
149 | for (i = 1; i < sbi->s_mirrors; i++) { | |
f068272c | 150 | bh2 = omfs_bread(inode->i_sb, inode->i_ino + i); |
555e3775 BC |
151 | if (!bh2) |
152 | goto out_brelse; | |
153 | ||
154 | memcpy(bh2->b_data, bh->b_data, bh->b_size); | |
155 | mark_buffer_dirty(bh2); | |
156 | if (wait) { | |
157 | sync_dirty_buffer(bh2); | |
158 | if (buffer_req(bh2) && !buffer_uptodate(bh2)) | |
159 | sync_failed = 1; | |
160 | } | |
161 | brelse(bh2); | |
162 | } | |
163 | ret = (sync_failed) ? -EIO : 0; | |
164 | out_brelse: | |
165 | brelse(bh); | |
166 | out: | |
167 | return ret; | |
168 | } | |
169 | ||
a9185b41 CH |
170 | static int omfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
171 | { | |
172 | return __omfs_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); | |
173 | } | |
174 | ||
555e3775 BC |
175 | int omfs_sync_inode(struct inode *inode) |
176 | { | |
a9185b41 | 177 | return __omfs_write_inode(inode, 1); |
555e3775 BC |
178 | } |
179 | ||
180 | /* | |
181 | * called when an entry is deleted, need to clear the bits in the | |
182 | * bitmaps. | |
183 | */ | |
184 | static void omfs_delete_inode(struct inode *inode) | |
185 | { | |
186 | truncate_inode_pages(&inode->i_data, 0); | |
187 | ||
188 | if (S_ISREG(inode->i_mode)) { | |
189 | inode->i_size = 0; | |
190 | omfs_shrink_inode(inode); | |
191 | } | |
192 | ||
193 | omfs_clear_range(inode->i_sb, inode->i_ino, 2); | |
194 | clear_inode(inode); | |
195 | } | |
196 | ||
197 | struct inode *omfs_iget(struct super_block *sb, ino_t ino) | |
198 | { | |
199 | struct omfs_sb_info *sbi = OMFS_SB(sb); | |
200 | struct omfs_inode *oi; | |
201 | struct buffer_head *bh; | |
555e3775 BC |
202 | u64 ctime; |
203 | unsigned long nsecs; | |
204 | struct inode *inode; | |
205 | ||
206 | inode = iget_locked(sb, ino); | |
207 | if (!inode) | |
208 | return ERR_PTR(-ENOMEM); | |
209 | if (!(inode->i_state & I_NEW)) | |
210 | return inode; | |
211 | ||
f068272c | 212 | bh = omfs_bread(inode->i_sb, ino); |
555e3775 BC |
213 | if (!bh) |
214 | goto iget_failed; | |
215 | ||
216 | oi = (struct omfs_inode *)bh->b_data; | |
217 | ||
218 | /* check self */ | |
219 | if (ino != be64_to_cpu(oi->i_head.h_self)) | |
220 | goto fail_bh; | |
221 | ||
222 | inode->i_uid = sbi->s_uid; | |
223 | inode->i_gid = sbi->s_gid; | |
224 | ||
225 | ctime = be64_to_cpu(oi->i_ctime); | |
226 | nsecs = do_div(ctime, 1000) * 1000L; | |
227 | ||
228 | inode->i_atime.tv_sec = ctime; | |
229 | inode->i_mtime.tv_sec = ctime; | |
230 | inode->i_ctime.tv_sec = ctime; | |
231 | inode->i_atime.tv_nsec = nsecs; | |
232 | inode->i_mtime.tv_nsec = nsecs; | |
233 | inode->i_ctime.tv_nsec = nsecs; | |
234 | ||
235 | inode->i_mapping->a_ops = &omfs_aops; | |
236 | ||
237 | switch (oi->i_type) { | |
238 | case OMFS_DIR: | |
239 | inode->i_mode = S_IFDIR | (S_IRWXUGO & ~sbi->s_dmask); | |
240 | inode->i_op = &omfs_dir_inops; | |
241 | inode->i_fop = &omfs_dir_operations; | |
c963343a | 242 | inode->i_size = sbi->s_sys_blocksize; |
555e3775 BC |
243 | inc_nlink(inode); |
244 | break; | |
245 | case OMFS_FILE: | |
246 | inode->i_mode = S_IFREG | (S_IRWXUGO & ~sbi->s_fmask); | |
247 | inode->i_fop = &omfs_file_operations; | |
248 | inode->i_size = be64_to_cpu(oi->i_size); | |
249 | break; | |
250 | } | |
251 | brelse(bh); | |
252 | unlock_new_inode(inode); | |
253 | return inode; | |
254 | fail_bh: | |
255 | brelse(bh); | |
256 | iget_failed: | |
257 | iget_failed(inode); | |
258 | return ERR_PTR(-EIO); | |
259 | } | |
260 | ||
261 | static void omfs_put_super(struct super_block *sb) | |
262 | { | |
263 | struct omfs_sb_info *sbi = OMFS_SB(sb); | |
264 | kfree(sbi->s_imap); | |
265 | kfree(sbi); | |
266 | sb->s_fs_info = NULL; | |
267 | } | |
268 | ||
269 | static int omfs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
270 | { | |
271 | struct super_block *s = dentry->d_sb; | |
272 | struct omfs_sb_info *sbi = OMFS_SB(s); | |
197e671e CL |
273 | u64 id = huge_encode_dev(s->s_bdev->bd_dev); |
274 | ||
555e3775 BC |
275 | buf->f_type = OMFS_MAGIC; |
276 | buf->f_bsize = sbi->s_blocksize; | |
277 | buf->f_blocks = sbi->s_num_blocks; | |
278 | buf->f_files = sbi->s_num_blocks; | |
279 | buf->f_namelen = OMFS_NAMELEN; | |
197e671e CL |
280 | buf->f_fsid.val[0] = (u32)id; |
281 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
555e3775 BC |
282 | |
283 | buf->f_bfree = buf->f_bavail = buf->f_ffree = | |
284 | omfs_count_free(s); | |
197e671e | 285 | |
555e3775 BC |
286 | return 0; |
287 | } | |
288 | ||
b87221de | 289 | static const struct super_operations omfs_sops = { |
555e3775 BC |
290 | .write_inode = omfs_write_inode, |
291 | .delete_inode = omfs_delete_inode, | |
292 | .put_super = omfs_put_super, | |
293 | .statfs = omfs_statfs, | |
294 | .show_options = generic_show_options, | |
295 | }; | |
296 | ||
297 | /* | |
298 | * For Rio Karma, there is an on-disk free bitmap whose location is | |
299 | * stored in the root block. For ReplayTV, there is no such free bitmap | |
300 | * so we have to walk the tree. Both inodes and file data are allocated | |
301 | * from the same map. This array can be big (300k) so we allocate | |
302 | * in units of the blocksize. | |
303 | */ | |
304 | static int omfs_get_imap(struct super_block *sb) | |
305 | { | |
306 | int bitmap_size; | |
307 | int array_size; | |
308 | int count; | |
309 | struct omfs_sb_info *sbi = OMFS_SB(sb); | |
310 | struct buffer_head *bh; | |
311 | unsigned long **ptr; | |
312 | sector_t block; | |
313 | ||
314 | bitmap_size = DIV_ROUND_UP(sbi->s_num_blocks, 8); | |
315 | array_size = DIV_ROUND_UP(bitmap_size, sb->s_blocksize); | |
316 | ||
317 | if (sbi->s_bitmap_ino == ~0ULL) | |
318 | goto out; | |
319 | ||
320 | sbi->s_imap_size = array_size; | |
321 | sbi->s_imap = kzalloc(array_size * sizeof(unsigned long *), GFP_KERNEL); | |
322 | if (!sbi->s_imap) | |
323 | goto nomem; | |
324 | ||
325 | block = clus_to_blk(sbi, sbi->s_bitmap_ino); | |
f068272c BC |
326 | if (block >= sbi->s_num_blocks) |
327 | goto nomem; | |
328 | ||
555e3775 BC |
329 | ptr = sbi->s_imap; |
330 | for (count = bitmap_size; count > 0; count -= sb->s_blocksize) { | |
331 | bh = sb_bread(sb, block++); | |
332 | if (!bh) | |
333 | goto nomem_free; | |
334 | *ptr = kmalloc(sb->s_blocksize, GFP_KERNEL); | |
335 | if (!*ptr) { | |
336 | brelse(bh); | |
337 | goto nomem_free; | |
338 | } | |
339 | memcpy(*ptr, bh->b_data, sb->s_blocksize); | |
340 | if (count < sb->s_blocksize) | |
341 | memset((void *)*ptr + count, 0xff, | |
342 | sb->s_blocksize - count); | |
343 | brelse(bh); | |
344 | ptr++; | |
345 | } | |
346 | out: | |
347 | return 0; | |
348 | ||
349 | nomem_free: | |
350 | for (count = 0; count < array_size; count++) | |
351 | kfree(sbi->s_imap[count]); | |
352 | ||
353 | kfree(sbi->s_imap); | |
354 | nomem: | |
355 | sbi->s_imap = NULL; | |
356 | sbi->s_imap_size = 0; | |
357 | return -ENOMEM; | |
358 | } | |
359 | ||
360 | enum { | |
361 | Opt_uid, Opt_gid, Opt_umask, Opt_dmask, Opt_fmask | |
362 | }; | |
363 | ||
a447c093 | 364 | static const match_table_t tokens = { |
555e3775 BC |
365 | {Opt_uid, "uid=%u"}, |
366 | {Opt_gid, "gid=%u"}, | |
367 | {Opt_umask, "umask=%o"}, | |
368 | {Opt_dmask, "dmask=%o"}, | |
369 | {Opt_fmask, "fmask=%o"}, | |
370 | }; | |
371 | ||
372 | static int parse_options(char *options, struct omfs_sb_info *sbi) | |
373 | { | |
374 | char *p; | |
375 | substring_t args[MAX_OPT_ARGS]; | |
376 | int option; | |
377 | ||
378 | if (!options) | |
379 | return 1; | |
380 | ||
381 | while ((p = strsep(&options, ",")) != NULL) { | |
382 | int token; | |
383 | if (!*p) | |
384 | continue; | |
385 | ||
386 | token = match_token(p, tokens, args); | |
387 | switch (token) { | |
388 | case Opt_uid: | |
389 | if (match_int(&args[0], &option)) | |
390 | return 0; | |
391 | sbi->s_uid = option; | |
392 | break; | |
393 | case Opt_gid: | |
394 | if (match_int(&args[0], &option)) | |
395 | return 0; | |
396 | sbi->s_gid = option; | |
397 | break; | |
398 | case Opt_umask: | |
399 | if (match_octal(&args[0], &option)) | |
400 | return 0; | |
401 | sbi->s_fmask = sbi->s_dmask = option; | |
402 | break; | |
403 | case Opt_dmask: | |
404 | if (match_octal(&args[0], &option)) | |
405 | return 0; | |
406 | sbi->s_dmask = option; | |
407 | break; | |
408 | case Opt_fmask: | |
409 | if (match_octal(&args[0], &option)) | |
410 | return 0; | |
411 | sbi->s_fmask = option; | |
412 | break; | |
413 | default: | |
414 | return 0; | |
415 | } | |
416 | } | |
417 | return 1; | |
418 | } | |
419 | ||
420 | static int omfs_fill_super(struct super_block *sb, void *data, int silent) | |
421 | { | |
422 | struct buffer_head *bh, *bh2; | |
423 | struct omfs_super_block *omfs_sb; | |
424 | struct omfs_root_block *omfs_rb; | |
425 | struct omfs_sb_info *sbi; | |
426 | struct inode *root; | |
555e3775 BC |
427 | int ret = -EINVAL; |
428 | ||
429 | save_mount_options(sb, (char *) data); | |
430 | ||
431 | sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL); | |
432 | if (!sbi) | |
433 | return -ENOMEM; | |
434 | ||
435 | sb->s_fs_info = sbi; | |
436 | ||
c222d53e DH |
437 | sbi->s_uid = current_uid(); |
438 | sbi->s_gid = current_gid(); | |
ce3b0f8d | 439 | sbi->s_dmask = sbi->s_fmask = current_umask(); |
555e3775 BC |
440 | |
441 | if (!parse_options((char *) data, sbi)) | |
442 | goto end; | |
443 | ||
444 | sb->s_maxbytes = 0xffffffff; | |
445 | ||
446 | sb_set_blocksize(sb, 0x200); | |
447 | ||
448 | bh = sb_bread(sb, 0); | |
449 | if (!bh) | |
450 | goto end; | |
451 | ||
452 | omfs_sb = (struct omfs_super_block *)bh->b_data; | |
453 | ||
454 | if (omfs_sb->s_magic != cpu_to_be32(OMFS_MAGIC)) { | |
455 | if (!silent) | |
456 | printk(KERN_ERR "omfs: Invalid superblock (%x)\n", | |
457 | omfs_sb->s_magic); | |
458 | goto out_brelse_bh; | |
459 | } | |
460 | sb->s_magic = OMFS_MAGIC; | |
461 | ||
462 | sbi->s_num_blocks = be64_to_cpu(omfs_sb->s_num_blocks); | |
463 | sbi->s_blocksize = be32_to_cpu(omfs_sb->s_blocksize); | |
464 | sbi->s_mirrors = be32_to_cpu(omfs_sb->s_mirrors); | |
465 | sbi->s_root_ino = be64_to_cpu(omfs_sb->s_root_block); | |
466 | sbi->s_sys_blocksize = be32_to_cpu(omfs_sb->s_sys_blocksize); | |
467 | mutex_init(&sbi->s_bitmap_lock); | |
468 | ||
469 | if (sbi->s_sys_blocksize > PAGE_SIZE) { | |
470 | printk(KERN_ERR "omfs: sysblock size (%d) is out of range\n", | |
471 | sbi->s_sys_blocksize); | |
472 | goto out_brelse_bh; | |
473 | } | |
474 | ||
475 | if (sbi->s_blocksize < sbi->s_sys_blocksize || | |
476 | sbi->s_blocksize > OMFS_MAX_BLOCK_SIZE) { | |
477 | printk(KERN_ERR "omfs: block size (%d) is out of range\n", | |
478 | sbi->s_blocksize); | |
479 | goto out_brelse_bh; | |
480 | } | |
481 | ||
482 | /* | |
483 | * Use sys_blocksize as the fs block since it is smaller than a | |
484 | * page while the fs blocksize can be larger. | |
485 | */ | |
486 | sb_set_blocksize(sb, sbi->s_sys_blocksize); | |
487 | ||
488 | /* | |
489 | * ...and the difference goes into a shift. sys_blocksize is always | |
490 | * a power of two factor of blocksize. | |
491 | */ | |
492 | sbi->s_block_shift = get_bitmask_order(sbi->s_blocksize) - | |
493 | get_bitmask_order(sbi->s_sys_blocksize); | |
494 | ||
f068272c | 495 | bh2 = omfs_bread(sb, be64_to_cpu(omfs_sb->s_root_block)); |
555e3775 BC |
496 | if (!bh2) |
497 | goto out_brelse_bh; | |
498 | ||
499 | omfs_rb = (struct omfs_root_block *)bh2->b_data; | |
500 | ||
501 | sbi->s_bitmap_ino = be64_to_cpu(omfs_rb->r_bitmap); | |
502 | sbi->s_clustersize = be32_to_cpu(omfs_rb->r_clustersize); | |
503 | ||
504 | if (sbi->s_num_blocks != be64_to_cpu(omfs_rb->r_num_blocks)) { | |
505 | printk(KERN_ERR "omfs: block count discrepancy between " | |
506 | "super and root blocks (%llx, %llx)\n", | |
dc60bf1d AB |
507 | (unsigned long long)sbi->s_num_blocks, |
508 | (unsigned long long)be64_to_cpu(omfs_rb->r_num_blocks)); | |
555e3775 BC |
509 | goto out_brelse_bh2; |
510 | } | |
511 | ||
512 | ret = omfs_get_imap(sb); | |
513 | if (ret) | |
514 | goto out_brelse_bh2; | |
515 | ||
516 | sb->s_op = &omfs_sops; | |
517 | ||
518 | root = omfs_iget(sb, be64_to_cpu(omfs_rb->r_root_dir)); | |
519 | if (IS_ERR(root)) { | |
520 | ret = PTR_ERR(root); | |
521 | goto out_brelse_bh2; | |
522 | } | |
523 | ||
524 | sb->s_root = d_alloc_root(root); | |
525 | if (!sb->s_root) { | |
526 | iput(root); | |
527 | goto out_brelse_bh2; | |
528 | } | |
529 | printk(KERN_DEBUG "omfs: Mounted volume %s\n", omfs_rb->r_name); | |
530 | ||
531 | ret = 0; | |
532 | out_brelse_bh2: | |
533 | brelse(bh2); | |
534 | out_brelse_bh: | |
535 | brelse(bh); | |
536 | end: | |
70d9e384 DB |
537 | if (ret) |
538 | kfree(sbi); | |
555e3775 BC |
539 | return ret; |
540 | } | |
541 | ||
542 | static int omfs_get_sb(struct file_system_type *fs_type, | |
543 | int flags, const char *dev_name, | |
544 | void *data, struct vfsmount *m) | |
545 | { | |
546 | return get_sb_bdev(fs_type, flags, dev_name, data, omfs_fill_super, m); | |
547 | } | |
548 | ||
549 | static struct file_system_type omfs_fs_type = { | |
550 | .owner = THIS_MODULE, | |
551 | .name = "omfs", | |
552 | .get_sb = omfs_get_sb, | |
553 | .kill_sb = kill_block_super, | |
554 | .fs_flags = FS_REQUIRES_DEV, | |
555 | }; | |
556 | ||
557 | static int __init init_omfs_fs(void) | |
558 | { | |
559 | return register_filesystem(&omfs_fs_type); | |
560 | } | |
561 | ||
562 | static void __exit exit_omfs_fs(void) | |
563 | { | |
564 | unregister_filesystem(&omfs_fs_type); | |
565 | } | |
566 | ||
567 | module_init(init_omfs_fs); | |
568 | module_exit(exit_omfs_fs); |