Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/bfs/inode.c | |
3 | * BFS superblock and inode operations. | |
69688262 | 4 | * Copyright (C) 1999-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk> |
1da177e4 | 5 | * From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds. |
fac92bec AS |
6 | * |
7 | * Made endianness-clean by Andrew Stribblehill <ads@wompom.org>, 2005. | |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/smp_lock.h> | |
16 | #include <linux/buffer_head.h> | |
17 | #include <linux/vfs.h> | |
a9185b41 | 18 | #include <linux/writeback.h> |
1da177e4 LT |
19 | #include <asm/uaccess.h> |
20 | #include "bfs.h" | |
21 | ||
69688262 | 22 | MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); |
1da177e4 LT |
23 | MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux"); |
24 | MODULE_LICENSE("GPL"); | |
25 | ||
26 | #undef DEBUG | |
27 | ||
28 | #ifdef DEBUG | |
29 | #define dprintf(x...) printf(x) | |
30 | #else | |
31 | #define dprintf(x...) | |
32 | #endif | |
33 | ||
f433dc56 | 34 | void dump_imap(const char *prefix, struct super_block *s); |
1da177e4 | 35 | |
e33ab086 | 36 | struct inode *bfs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 37 | { |
f433dc56 | 38 | struct bfs_inode *di; |
e33ab086 | 39 | struct inode *inode; |
f433dc56 | 40 | struct buffer_head *bh; |
1da177e4 LT |
41 | int block, off; |
42 | ||
e33ab086 DH |
43 | inode = iget_locked(sb, ino); |
44 | if (IS_ERR(inode)) | |
45 | return ERR_PTR(-ENOMEM); | |
46 | if (!(inode->i_state & I_NEW)) | |
47 | return inode; | |
48 | ||
f433dc56 | 49 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) { |
1da177e4 | 50 | printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino); |
e33ab086 | 51 | goto error; |
1da177e4 LT |
52 | } |
53 | ||
f433dc56 | 54 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
1da177e4 LT |
55 | bh = sb_bread(inode->i_sb, block); |
56 | if (!bh) { | |
f433dc56 DV |
57 | printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, |
58 | ino); | |
e33ab086 | 59 | goto error; |
1da177e4 LT |
60 | } |
61 | ||
62 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; | |
63 | di = (struct bfs_inode *)bh->b_data + off; | |
64 | ||
f433dc56 | 65 | inode->i_mode = 0x0000FFFF & le32_to_cpu(di->i_mode); |
fac92bec | 66 | if (le32_to_cpu(di->i_vtype) == BFS_VDIR) { |
1da177e4 LT |
67 | inode->i_mode |= S_IFDIR; |
68 | inode->i_op = &bfs_dir_inops; | |
69 | inode->i_fop = &bfs_dir_operations; | |
fac92bec | 70 | } else if (le32_to_cpu(di->i_vtype) == BFS_VREG) { |
1da177e4 LT |
71 | inode->i_mode |= S_IFREG; |
72 | inode->i_op = &bfs_file_inops; | |
73 | inode->i_fop = &bfs_file_operations; | |
74 | inode->i_mapping->a_ops = &bfs_aops; | |
75 | } | |
76 | ||
fac92bec AS |
77 | BFS_I(inode)->i_sblock = le32_to_cpu(di->i_sblock); |
78 | BFS_I(inode)->i_eblock = le32_to_cpu(di->i_eblock); | |
f433dc56 | 79 | BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino); |
fac92bec AS |
80 | inode->i_uid = le32_to_cpu(di->i_uid); |
81 | inode->i_gid = le32_to_cpu(di->i_gid); | |
82 | inode->i_nlink = le32_to_cpu(di->i_nlink); | |
1da177e4 LT |
83 | inode->i_size = BFS_FILESIZE(di); |
84 | inode->i_blocks = BFS_FILEBLOCKS(di); | |
fac92bec AS |
85 | inode->i_atime.tv_sec = le32_to_cpu(di->i_atime); |
86 | inode->i_mtime.tv_sec = le32_to_cpu(di->i_mtime); | |
87 | inode->i_ctime.tv_sec = le32_to_cpu(di->i_ctime); | |
1da177e4 LT |
88 | inode->i_atime.tv_nsec = 0; |
89 | inode->i_mtime.tv_nsec = 0; | |
90 | inode->i_ctime.tv_nsec = 0; | |
1da177e4 LT |
91 | |
92 | brelse(bh); | |
e33ab086 DH |
93 | unlock_new_inode(inode); |
94 | return inode; | |
95 | ||
96 | error: | |
97 | iget_failed(inode); | |
98 | return ERR_PTR(-EIO); | |
1da177e4 LT |
99 | } |
100 | ||
9df2f851 AV |
101 | static struct bfs_inode *find_inode(struct super_block *sb, u16 ino, struct buffer_head **p) |
102 | { | |
103 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(sb)->si_lasti)) { | |
104 | printf("Bad inode number %s:%08x\n", sb->s_id, ino); | |
105 | return ERR_PTR(-EIO); | |
106 | } | |
107 | ||
108 | ino -= BFS_ROOT_INO; | |
109 | ||
110 | *p = sb_bread(sb, 1 + ino / BFS_INODES_PER_BLOCK); | |
111 | if (!*p) { | |
112 | printf("Unable to read inode %s:%08x\n", sb->s_id, ino); | |
113 | return ERR_PTR(-EIO); | |
114 | } | |
115 | ||
116 | return (struct bfs_inode *)(*p)->b_data + ino % BFS_INODES_PER_BLOCK; | |
117 | } | |
118 | ||
a9185b41 | 119 | static int bfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 120 | { |
4427f0c3 | 121 | struct bfs_sb_info *info = BFS_SB(inode->i_sb); |
fac92bec AS |
122 | unsigned int ino = (u16)inode->i_ino; |
123 | unsigned long i_sblock; | |
f433dc56 DV |
124 | struct bfs_inode *di; |
125 | struct buffer_head *bh; | |
4427f0c3 | 126 | int err = 0; |
1da177e4 | 127 | |
fac92bec AS |
128 | dprintf("ino=%08x\n", ino); |
129 | ||
9df2f851 AV |
130 | di = find_inode(inode->i_sb, ino, &bh); |
131 | if (IS_ERR(di)) | |
132 | return PTR_ERR(di); | |
1da177e4 | 133 | |
3f165e4c | 134 | mutex_lock(&info->bfs_lock); |
1da177e4 | 135 | |
fac92bec AS |
136 | if (ino == BFS_ROOT_INO) |
137 | di->i_vtype = cpu_to_le32(BFS_VDIR); | |
1da177e4 | 138 | else |
fac92bec AS |
139 | di->i_vtype = cpu_to_le32(BFS_VREG); |
140 | ||
141 | di->i_ino = cpu_to_le16(ino); | |
142 | di->i_mode = cpu_to_le32(inode->i_mode); | |
143 | di->i_uid = cpu_to_le32(inode->i_uid); | |
144 | di->i_gid = cpu_to_le32(inode->i_gid); | |
145 | di->i_nlink = cpu_to_le32(inode->i_nlink); | |
146 | di->i_atime = cpu_to_le32(inode->i_atime.tv_sec); | |
147 | di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); | |
148 | di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); | |
149 | i_sblock = BFS_I(inode)->i_sblock; | |
150 | di->i_sblock = cpu_to_le32(i_sblock); | |
151 | di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock); | |
152 | di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1); | |
1da177e4 LT |
153 | |
154 | mark_buffer_dirty(bh); | |
a9185b41 | 155 | if (wbc->sync_mode == WB_SYNC_ALL) { |
4427f0c3 AV |
156 | sync_dirty_buffer(bh); |
157 | if (buffer_req(bh) && !buffer_uptodate(bh)) | |
158 | err = -EIO; | |
159 | } | |
1da177e4 | 160 | brelse(bh); |
3f165e4c | 161 | mutex_unlock(&info->bfs_lock); |
4427f0c3 | 162 | return err; |
1da177e4 LT |
163 | } |
164 | ||
9df2f851 | 165 | static void bfs_evict_inode(struct inode *inode) |
1da177e4 LT |
166 | { |
167 | unsigned long ino = inode->i_ino; | |
f433dc56 DV |
168 | struct bfs_inode *di; |
169 | struct buffer_head *bh; | |
f433dc56 DV |
170 | struct super_block *s = inode->i_sb; |
171 | struct bfs_sb_info *info = BFS_SB(s); | |
172 | struct bfs_inode_info *bi = BFS_I(inode); | |
1da177e4 | 173 | |
fac92bec | 174 | dprintf("ino=%08lx\n", ino); |
1da177e4 | 175 | |
fef26658 | 176 | truncate_inode_pages(&inode->i_data, 0); |
9df2f851 AV |
177 | invalidate_inode_buffers(inode); |
178 | end_writeback(inode); | |
fef26658 | 179 | |
9df2f851 | 180 | if (inode->i_nlink) |
1da177e4 | 181 | return; |
f433dc56 | 182 | |
9df2f851 AV |
183 | di = find_inode(s, inode->i_ino, &bh); |
184 | if (IS_ERR(di)) | |
1da177e4 | 185 | return; |
9df2f851 AV |
186 | |
187 | mutex_lock(&info->bfs_lock); | |
188 | /* clear on-disk inode */ | |
189 | memset(di, 0, sizeof(struct bfs_inode)); | |
f433dc56 DV |
190 | mark_buffer_dirty(bh); |
191 | brelse(bh); | |
192 | ||
fac92bec | 193 | if (bi->i_dsk_ino) { |
7e46aa5c AV |
194 | if (bi->i_sblock) |
195 | info->si_freeb += bi->i_eblock + 1 - bi->i_sblock; | |
1da177e4 | 196 | info->si_freei++; |
fac92bec | 197 | clear_bit(ino, info->si_imap); |
1da177e4 | 198 | dump_imap("delete_inode", s); |
fac92bec | 199 | } |
1da177e4 | 200 | |
f433dc56 DV |
201 | /* |
202 | * If this was the last file, make the previous block | |
203 | * "last block of the last file" even if there is no | |
204 | * real file there, saves us 1 gap. | |
205 | */ | |
4e29d50a | 206 | if (info->si_lf_eblk == bi->i_eblock) |
f433dc56 | 207 | info->si_lf_eblk = bi->i_sblock - 1; |
3f165e4c | 208 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
209 | } |
210 | ||
211 | static void bfs_put_super(struct super_block *s) | |
212 | { | |
213 | struct bfs_sb_info *info = BFS_SB(s); | |
3f165e4c | 214 | |
e1f89ec9 ES |
215 | if (!info) |
216 | return; | |
217 | ||
6cfd0148 CH |
218 | lock_kernel(); |
219 | ||
3f165e4c | 220 | mutex_destroy(&info->bfs_lock); |
1da177e4 LT |
221 | kfree(info->si_imap); |
222 | kfree(info); | |
223 | s->s_fs_info = NULL; | |
6cfd0148 CH |
224 | |
225 | unlock_kernel(); | |
1da177e4 LT |
226 | } |
227 | ||
726c3342 | 228 | static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 229 | { |
726c3342 | 230 | struct super_block *s = dentry->d_sb; |
1da177e4 LT |
231 | struct bfs_sb_info *info = BFS_SB(s); |
232 | u64 id = huge_encode_dev(s->s_bdev->bd_dev); | |
233 | buf->f_type = BFS_MAGIC; | |
234 | buf->f_bsize = s->s_blocksize; | |
235 | buf->f_blocks = info->si_blocks; | |
236 | buf->f_bfree = buf->f_bavail = info->si_freeb; | |
237 | buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO; | |
238 | buf->f_ffree = info->si_freei; | |
239 | buf->f_fsid.val[0] = (u32)id; | |
240 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
241 | buf->f_namelen = BFS_NAMELEN; | |
242 | return 0; | |
243 | } | |
244 | ||
f433dc56 | 245 | static struct kmem_cache *bfs_inode_cachep; |
1da177e4 LT |
246 | |
247 | static struct inode *bfs_alloc_inode(struct super_block *sb) | |
248 | { | |
249 | struct bfs_inode_info *bi; | |
e94b1766 | 250 | bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
251 | if (!bi) |
252 | return NULL; | |
253 | return &bi->vfs_inode; | |
254 | } | |
255 | ||
256 | static void bfs_destroy_inode(struct inode *inode) | |
257 | { | |
258 | kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); | |
259 | } | |
260 | ||
51cc5068 | 261 | static void init_once(void *foo) |
1da177e4 LT |
262 | { |
263 | struct bfs_inode_info *bi = foo; | |
264 | ||
a35afb83 | 265 | inode_init_once(&bi->vfs_inode); |
1da177e4 | 266 | } |
20c2df83 | 267 | |
1da177e4 LT |
268 | static int init_inodecache(void) |
269 | { | |
270 | bfs_inode_cachep = kmem_cache_create("bfs_inode_cache", | |
271 | sizeof(struct bfs_inode_info), | |
fffb60f9 PJ |
272 | 0, (SLAB_RECLAIM_ACCOUNT| |
273 | SLAB_MEM_SPREAD), | |
20c2df83 | 274 | init_once); |
1da177e4 LT |
275 | if (bfs_inode_cachep == NULL) |
276 | return -ENOMEM; | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static void destroy_inodecache(void) | |
281 | { | |
1a1d92c1 | 282 | kmem_cache_destroy(bfs_inode_cachep); |
1da177e4 LT |
283 | } |
284 | ||
ee9b6d61 | 285 | static const struct super_operations bfs_sops = { |
1da177e4 LT |
286 | .alloc_inode = bfs_alloc_inode, |
287 | .destroy_inode = bfs_destroy_inode, | |
1da177e4 | 288 | .write_inode = bfs_write_inode, |
9df2f851 | 289 | .evict_inode = bfs_evict_inode, |
1da177e4 | 290 | .put_super = bfs_put_super, |
1da177e4 LT |
291 | .statfs = bfs_statfs, |
292 | }; | |
293 | ||
f433dc56 | 294 | void dump_imap(const char *prefix, struct super_block *s) |
1da177e4 | 295 | { |
fac92bec | 296 | #ifdef DEBUG |
1da177e4 LT |
297 | int i; |
298 | char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL); | |
299 | ||
300 | if (!tmpbuf) | |
301 | return; | |
f433dc56 DV |
302 | for (i = BFS_SB(s)->si_lasti; i >= 0; i--) { |
303 | if (i > PAGE_SIZE - 100) break; | |
1da177e4 LT |
304 | if (test_bit(i, BFS_SB(s)->si_imap)) |
305 | strcat(tmpbuf, "1"); | |
306 | else | |
307 | strcat(tmpbuf, "0"); | |
308 | } | |
f433dc56 DV |
309 | printf("BFS-fs: %s: lasti=%08lx <%s>\n", |
310 | prefix, BFS_SB(s)->si_lasti, tmpbuf); | |
1da177e4 LT |
311 | free_page((unsigned long)tmpbuf); |
312 | #endif | |
313 | } | |
314 | ||
315 | static int bfs_fill_super(struct super_block *s, void *data, int silent) | |
316 | { | |
4e29d50a | 317 | struct buffer_head *bh, *sbh; |
f433dc56 DV |
318 | struct bfs_super_block *bfs_sb; |
319 | struct inode *inode; | |
fac92bec | 320 | unsigned i, imap_len; |
f433dc56 | 321 | struct bfs_sb_info *info; |
5998649f | 322 | int ret = -EINVAL; |
e1f89ec9 | 323 | unsigned long i_sblock, i_eblock, i_eoff, s_size; |
1da177e4 | 324 | |
f8314dc6 | 325 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
326 | if (!info) |
327 | return -ENOMEM; | |
5998649f | 328 | mutex_init(&info->bfs_lock); |
1da177e4 | 329 | s->s_fs_info = info; |
1da177e4 LT |
330 | |
331 | sb_set_blocksize(s, BFS_BSIZE); | |
332 | ||
4e29d50a AB |
333 | sbh = sb_bread(s, 0); |
334 | if (!sbh) | |
1da177e4 | 335 | goto out; |
4e29d50a | 336 | bfs_sb = (struct bfs_super_block *)sbh->b_data; |
fac92bec | 337 | if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) { |
1da177e4 LT |
338 | if (!silent) |
339 | printf("No BFS filesystem on %s (magic=%08x)\n", | |
fac92bec | 340 | s->s_id, le32_to_cpu(bfs_sb->s_magic)); |
5998649f | 341 | goto out1; |
1da177e4 LT |
342 | } |
343 | if (BFS_UNCLEAN(bfs_sb, s) && !silent) | |
344 | printf("%s is unclean, continuing\n", s->s_id); | |
345 | ||
346 | s->s_magic = BFS_MAGIC; | |
e1f89ec9 ES |
347 | |
348 | if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end)) { | |
349 | printf("Superblock is corrupted\n"); | |
5998649f | 350 | goto out1; |
e1f89ec9 ES |
351 | } |
352 | ||
f433dc56 DV |
353 | info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / |
354 | sizeof(struct bfs_inode) | |
355 | + BFS_ROOT_INO - 1; | |
356 | imap_len = (info->si_lasti / 8) + 1; | |
f8314dc6 | 357 | info->si_imap = kzalloc(imap_len, GFP_KERNEL); |
1da177e4 | 358 | if (!info->si_imap) |
5998649f | 359 | goto out1; |
f433dc56 | 360 | for (i = 0; i < BFS_ROOT_INO; i++) |
1da177e4 LT |
361 | set_bit(i, info->si_imap); |
362 | ||
363 | s->s_op = &bfs_sops; | |
e33ab086 DH |
364 | inode = bfs_iget(s, BFS_ROOT_INO); |
365 | if (IS_ERR(inode)) { | |
366 | ret = PTR_ERR(inode); | |
5998649f | 367 | goto out2; |
1da177e4 LT |
368 | } |
369 | s->s_root = d_alloc_root(inode); | |
370 | if (!s->s_root) { | |
371 | iput(inode); | |
e33ab086 | 372 | ret = -ENOMEM; |
5998649f | 373 | goto out2; |
1da177e4 LT |
374 | } |
375 | ||
f433dc56 DV |
376 | info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS; |
377 | info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 | |
378 | - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS; | |
1da177e4 LT |
379 | info->si_freei = 0; |
380 | info->si_lf_eblk = 0; | |
50682bb4 ES |
381 | |
382 | /* can we read the last block? */ | |
383 | bh = sb_bread(s, info->si_blocks - 1); | |
384 | if (!bh) { | |
385 | printf("Last block not available: %lu\n", info->si_blocks - 1); | |
50682bb4 | 386 | ret = -EIO; |
5998649f | 387 | goto out3; |
50682bb4 ES |
388 | } |
389 | brelse(bh); | |
390 | ||
c2b513df | 391 | bh = NULL; |
f433dc56 | 392 | for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) { |
c2b513df | 393 | struct bfs_inode *di; |
f433dc56 | 394 | int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
c2b513df | 395 | int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
75b25b4c | 396 | unsigned long eblock; |
c2b513df AV |
397 | |
398 | if (!off) { | |
399 | brelse(bh); | |
400 | bh = sb_bread(s, block); | |
401 | } | |
402 | ||
403 | if (!bh) | |
404 | continue; | |
405 | ||
406 | di = (struct bfs_inode *)bh->b_data + off; | |
407 | ||
e1f89ec9 ES |
408 | /* test if filesystem is not corrupted */ |
409 | ||
410 | i_eoff = le32_to_cpu(di->i_eoffset); | |
411 | i_sblock = le32_to_cpu(di->i_sblock); | |
412 | i_eblock = le32_to_cpu(di->i_eblock); | |
413 | s_size = le32_to_cpu(bfs_sb->s_end); | |
414 | ||
415 | if (i_sblock > info->si_blocks || | |
416 | i_eblock > info->si_blocks || | |
417 | i_sblock > i_eblock || | |
418 | i_eoff > s_size || | |
419 | i_sblock * BFS_BSIZE > i_eoff) { | |
420 | ||
421 | printf("Inode 0x%08x corrupted\n", i); | |
422 | ||
423 | brelse(bh); | |
5998649f AV |
424 | ret = -EIO; |
425 | goto out3; | |
e1f89ec9 ES |
426 | } |
427 | ||
c2b513df | 428 | if (!di->i_ino) { |
1da177e4 | 429 | info->si_freei++; |
c2b513df AV |
430 | continue; |
431 | } | |
432 | set_bit(i, info->si_imap); | |
433 | info->si_freeb -= BFS_FILEBLOCKS(di); | |
434 | ||
c2b513df | 435 | eblock = le32_to_cpu(di->i_eblock); |
f433dc56 | 436 | if (eblock > info->si_lf_eblk) |
c2b513df | 437 | info->si_lf_eblk = eblock; |
1da177e4 | 438 | } |
c2b513df | 439 | brelse(bh); |
4e29d50a | 440 | brelse(sbh); |
1da177e4 LT |
441 | dump_imap("read_super", s); |
442 | return 0; | |
443 | ||
5998649f AV |
444 | out3: |
445 | dput(s->s_root); | |
446 | s->s_root = NULL; | |
447 | out2: | |
448 | kfree(info->si_imap); | |
449 | out1: | |
4e29d50a | 450 | brelse(sbh); |
1da177e4 | 451 | out: |
5998649f | 452 | mutex_destroy(&info->bfs_lock); |
1da177e4 LT |
453 | kfree(info); |
454 | s->s_fs_info = NULL; | |
e33ab086 | 455 | return ret; |
1da177e4 LT |
456 | } |
457 | ||
454e2398 DH |
458 | static int bfs_get_sb(struct file_system_type *fs_type, |
459 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 460 | { |
454e2398 | 461 | return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super, mnt); |
1da177e4 LT |
462 | } |
463 | ||
464 | static struct file_system_type bfs_fs_type = { | |
465 | .owner = THIS_MODULE, | |
466 | .name = "bfs", | |
467 | .get_sb = bfs_get_sb, | |
468 | .kill_sb = kill_block_super, | |
469 | .fs_flags = FS_REQUIRES_DEV, | |
470 | }; | |
471 | ||
472 | static int __init init_bfs_fs(void) | |
473 | { | |
474 | int err = init_inodecache(); | |
475 | if (err) | |
476 | goto out1; | |
477 | err = register_filesystem(&bfs_fs_type); | |
478 | if (err) | |
479 | goto out; | |
480 | return 0; | |
481 | out: | |
482 | destroy_inodecache(); | |
483 | out1: | |
484 | return err; | |
485 | } | |
486 | ||
487 | static void __exit exit_bfs_fs(void) | |
488 | { | |
489 | unregister_filesystem(&bfs_fs_type); | |
490 | destroy_inodecache(); | |
491 | } | |
492 | ||
493 | module_init(init_bfs_fs) | |
494 | module_exit(exit_bfs_fs) |