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Commit | Line | Data |
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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> | |
1da177e4 LT |
15 | #include <linux/buffer_head.h> |
16 | #include <linux/vfs.h> | |
a9185b41 | 17 | #include <linux/writeback.h> |
1da177e4 LT |
18 | #include <asm/uaccess.h> |
19 | #include "bfs.h" | |
20 | ||
69688262 | 21 | MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); |
1da177e4 LT |
22 | MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux"); |
23 | MODULE_LICENSE("GPL"); | |
24 | ||
25 | #undef DEBUG | |
26 | ||
27 | #ifdef DEBUG | |
28 | #define dprintf(x...) printf(x) | |
29 | #else | |
30 | #define dprintf(x...) | |
31 | #endif | |
32 | ||
e33ab086 | 33 | struct inode *bfs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 34 | { |
f433dc56 | 35 | struct bfs_inode *di; |
e33ab086 | 36 | struct inode *inode; |
f433dc56 | 37 | struct buffer_head *bh; |
1da177e4 LT |
38 | int block, off; |
39 | ||
e33ab086 | 40 | inode = iget_locked(sb, ino); |
821ff77c | 41 | if (!inode) |
e33ab086 DH |
42 | return ERR_PTR(-ENOMEM); |
43 | if (!(inode->i_state & I_NEW)) | |
44 | return inode; | |
45 | ||
f433dc56 | 46 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) { |
1da177e4 | 47 | printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino); |
e33ab086 | 48 | goto error; |
1da177e4 LT |
49 | } |
50 | ||
f433dc56 | 51 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
1da177e4 LT |
52 | bh = sb_bread(inode->i_sb, block); |
53 | if (!bh) { | |
f433dc56 DV |
54 | printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, |
55 | ino); | |
e33ab086 | 56 | goto error; |
1da177e4 LT |
57 | } |
58 | ||
59 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; | |
60 | di = (struct bfs_inode *)bh->b_data + off; | |
61 | ||
f433dc56 | 62 | inode->i_mode = 0x0000FFFF & le32_to_cpu(di->i_mode); |
fac92bec | 63 | if (le32_to_cpu(di->i_vtype) == BFS_VDIR) { |
1da177e4 LT |
64 | inode->i_mode |= S_IFDIR; |
65 | inode->i_op = &bfs_dir_inops; | |
66 | inode->i_fop = &bfs_dir_operations; | |
fac92bec | 67 | } else if (le32_to_cpu(di->i_vtype) == BFS_VREG) { |
1da177e4 LT |
68 | inode->i_mode |= S_IFREG; |
69 | inode->i_op = &bfs_file_inops; | |
70 | inode->i_fop = &bfs_file_operations; | |
71 | inode->i_mapping->a_ops = &bfs_aops; | |
72 | } | |
73 | ||
fac92bec AS |
74 | BFS_I(inode)->i_sblock = le32_to_cpu(di->i_sblock); |
75 | BFS_I(inode)->i_eblock = le32_to_cpu(di->i_eblock); | |
f433dc56 | 76 | BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino); |
7f5b82b8 EB |
77 | i_uid_write(inode, le32_to_cpu(di->i_uid)); |
78 | i_gid_write(inode, le32_to_cpu(di->i_gid)); | |
bfe86848 | 79 | set_nlink(inode, le32_to_cpu(di->i_nlink)); |
1da177e4 LT |
80 | inode->i_size = BFS_FILESIZE(di); |
81 | inode->i_blocks = BFS_FILEBLOCKS(di); | |
fac92bec AS |
82 | inode->i_atime.tv_sec = le32_to_cpu(di->i_atime); |
83 | inode->i_mtime.tv_sec = le32_to_cpu(di->i_mtime); | |
84 | inode->i_ctime.tv_sec = le32_to_cpu(di->i_ctime); | |
1da177e4 LT |
85 | inode->i_atime.tv_nsec = 0; |
86 | inode->i_mtime.tv_nsec = 0; | |
87 | inode->i_ctime.tv_nsec = 0; | |
1da177e4 LT |
88 | |
89 | brelse(bh); | |
e33ab086 DH |
90 | unlock_new_inode(inode); |
91 | return inode; | |
92 | ||
93 | error: | |
94 | iget_failed(inode); | |
95 | return ERR_PTR(-EIO); | |
1da177e4 LT |
96 | } |
97 | ||
9df2f851 AV |
98 | static struct bfs_inode *find_inode(struct super_block *sb, u16 ino, struct buffer_head **p) |
99 | { | |
100 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(sb)->si_lasti)) { | |
101 | printf("Bad inode number %s:%08x\n", sb->s_id, ino); | |
102 | return ERR_PTR(-EIO); | |
103 | } | |
104 | ||
105 | ino -= BFS_ROOT_INO; | |
106 | ||
107 | *p = sb_bread(sb, 1 + ino / BFS_INODES_PER_BLOCK); | |
108 | if (!*p) { | |
109 | printf("Unable to read inode %s:%08x\n", sb->s_id, ino); | |
110 | return ERR_PTR(-EIO); | |
111 | } | |
112 | ||
113 | return (struct bfs_inode *)(*p)->b_data + ino % BFS_INODES_PER_BLOCK; | |
114 | } | |
115 | ||
a9185b41 | 116 | static int bfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 117 | { |
4427f0c3 | 118 | struct bfs_sb_info *info = BFS_SB(inode->i_sb); |
fac92bec AS |
119 | unsigned int ino = (u16)inode->i_ino; |
120 | unsigned long i_sblock; | |
f433dc56 DV |
121 | struct bfs_inode *di; |
122 | struct buffer_head *bh; | |
4427f0c3 | 123 | int err = 0; |
1da177e4 | 124 | |
fac92bec AS |
125 | dprintf("ino=%08x\n", ino); |
126 | ||
9df2f851 AV |
127 | di = find_inode(inode->i_sb, ino, &bh); |
128 | if (IS_ERR(di)) | |
129 | return PTR_ERR(di); | |
1da177e4 | 130 | |
3f165e4c | 131 | mutex_lock(&info->bfs_lock); |
1da177e4 | 132 | |
fac92bec AS |
133 | if (ino == BFS_ROOT_INO) |
134 | di->i_vtype = cpu_to_le32(BFS_VDIR); | |
1da177e4 | 135 | else |
fac92bec AS |
136 | di->i_vtype = cpu_to_le32(BFS_VREG); |
137 | ||
138 | di->i_ino = cpu_to_le16(ino); | |
139 | di->i_mode = cpu_to_le32(inode->i_mode); | |
7f5b82b8 EB |
140 | di->i_uid = cpu_to_le32(i_uid_read(inode)); |
141 | di->i_gid = cpu_to_le32(i_gid_read(inode)); | |
fac92bec AS |
142 | di->i_nlink = cpu_to_le32(inode->i_nlink); |
143 | di->i_atime = cpu_to_le32(inode->i_atime.tv_sec); | |
144 | di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); | |
145 | di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); | |
146 | i_sblock = BFS_I(inode)->i_sblock; | |
147 | di->i_sblock = cpu_to_le32(i_sblock); | |
148 | di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock); | |
149 | di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1); | |
1da177e4 LT |
150 | |
151 | mark_buffer_dirty(bh); | |
a9185b41 | 152 | if (wbc->sync_mode == WB_SYNC_ALL) { |
4427f0c3 AV |
153 | sync_dirty_buffer(bh); |
154 | if (buffer_req(bh) && !buffer_uptodate(bh)) | |
155 | err = -EIO; | |
156 | } | |
1da177e4 | 157 | brelse(bh); |
3f165e4c | 158 | mutex_unlock(&info->bfs_lock); |
4427f0c3 | 159 | return err; |
1da177e4 LT |
160 | } |
161 | ||
9df2f851 | 162 | static void bfs_evict_inode(struct inode *inode) |
1da177e4 LT |
163 | { |
164 | unsigned long ino = inode->i_ino; | |
f433dc56 DV |
165 | struct bfs_inode *di; |
166 | struct buffer_head *bh; | |
f433dc56 DV |
167 | struct super_block *s = inode->i_sb; |
168 | struct bfs_sb_info *info = BFS_SB(s); | |
169 | struct bfs_inode_info *bi = BFS_I(inode); | |
1da177e4 | 170 | |
fac92bec | 171 | dprintf("ino=%08lx\n", ino); |
1da177e4 | 172 | |
91b0abe3 | 173 | truncate_inode_pages_final(&inode->i_data); |
9df2f851 | 174 | invalidate_inode_buffers(inode); |
dbd5768f | 175 | clear_inode(inode); |
fef26658 | 176 | |
9df2f851 | 177 | if (inode->i_nlink) |
1da177e4 | 178 | return; |
f433dc56 | 179 | |
9df2f851 AV |
180 | di = find_inode(s, inode->i_ino, &bh); |
181 | if (IS_ERR(di)) | |
1da177e4 | 182 | return; |
9df2f851 AV |
183 | |
184 | mutex_lock(&info->bfs_lock); | |
185 | /* clear on-disk inode */ | |
186 | memset(di, 0, sizeof(struct bfs_inode)); | |
f433dc56 DV |
187 | mark_buffer_dirty(bh); |
188 | brelse(bh); | |
189 | ||
fac92bec | 190 | if (bi->i_dsk_ino) { |
7e46aa5c AV |
191 | if (bi->i_sblock) |
192 | info->si_freeb += bi->i_eblock + 1 - bi->i_sblock; | |
1da177e4 | 193 | info->si_freei++; |
fac92bec | 194 | clear_bit(ino, info->si_imap); |
1da85fdf | 195 | bfs_dump_imap("delete_inode", s); |
fac92bec | 196 | } |
1da177e4 | 197 | |
f433dc56 DV |
198 | /* |
199 | * If this was the last file, make the previous block | |
200 | * "last block of the last file" even if there is no | |
201 | * real file there, saves us 1 gap. | |
202 | */ | |
4e29d50a | 203 | if (info->si_lf_eblk == bi->i_eblock) |
f433dc56 | 204 | info->si_lf_eblk = bi->i_sblock - 1; |
3f165e4c | 205 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
206 | } |
207 | ||
208 | static void bfs_put_super(struct super_block *s) | |
209 | { | |
210 | struct bfs_sb_info *info = BFS_SB(s); | |
3f165e4c | 211 | |
e1f89ec9 ES |
212 | if (!info) |
213 | return; | |
214 | ||
3f165e4c | 215 | mutex_destroy(&info->bfs_lock); |
1da177e4 LT |
216 | kfree(info->si_imap); |
217 | kfree(info); | |
218 | s->s_fs_info = NULL; | |
219 | } | |
220 | ||
726c3342 | 221 | static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 222 | { |
726c3342 | 223 | struct super_block *s = dentry->d_sb; |
1da177e4 LT |
224 | struct bfs_sb_info *info = BFS_SB(s); |
225 | u64 id = huge_encode_dev(s->s_bdev->bd_dev); | |
226 | buf->f_type = BFS_MAGIC; | |
227 | buf->f_bsize = s->s_blocksize; | |
228 | buf->f_blocks = info->si_blocks; | |
229 | buf->f_bfree = buf->f_bavail = info->si_freeb; | |
230 | buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO; | |
231 | buf->f_ffree = info->si_freei; | |
232 | buf->f_fsid.val[0] = (u32)id; | |
233 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
234 | buf->f_namelen = BFS_NAMELEN; | |
235 | return 0; | |
236 | } | |
237 | ||
f433dc56 | 238 | static struct kmem_cache *bfs_inode_cachep; |
1da177e4 LT |
239 | |
240 | static struct inode *bfs_alloc_inode(struct super_block *sb) | |
241 | { | |
242 | struct bfs_inode_info *bi; | |
e94b1766 | 243 | bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
244 | if (!bi) |
245 | return NULL; | |
246 | return &bi->vfs_inode; | |
247 | } | |
248 | ||
fa0d7e3d | 249 | static void bfs_i_callback(struct rcu_head *head) |
1da177e4 | 250 | { |
fa0d7e3d | 251 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
252 | kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); |
253 | } | |
254 | ||
fa0d7e3d NP |
255 | static void bfs_destroy_inode(struct inode *inode) |
256 | { | |
257 | call_rcu(&inode->i_rcu, bfs_i_callback); | |
258 | } | |
259 | ||
51cc5068 | 260 | static void init_once(void *foo) |
1da177e4 LT |
261 | { |
262 | struct bfs_inode_info *bi = foo; | |
263 | ||
a35afb83 | 264 | inode_init_once(&bi->vfs_inode); |
1da177e4 | 265 | } |
20c2df83 | 266 | |
758b4440 | 267 | static int __init init_inodecache(void) |
1da177e4 LT |
268 | { |
269 | bfs_inode_cachep = kmem_cache_create("bfs_inode_cache", | |
270 | sizeof(struct bfs_inode_info), | |
fffb60f9 PJ |
271 | 0, (SLAB_RECLAIM_ACCOUNT| |
272 | SLAB_MEM_SPREAD), | |
20c2df83 | 273 | init_once); |
1da177e4 LT |
274 | if (bfs_inode_cachep == NULL) |
275 | return -ENOMEM; | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static void destroy_inodecache(void) | |
280 | { | |
8c0a8537 KS |
281 | /* |
282 | * Make sure all delayed rcu free inodes are flushed before we | |
283 | * destroy cache. | |
284 | */ | |
285 | rcu_barrier(); | |
1a1d92c1 | 286 | kmem_cache_destroy(bfs_inode_cachep); |
1da177e4 LT |
287 | } |
288 | ||
ee9b6d61 | 289 | static const struct super_operations bfs_sops = { |
1da177e4 LT |
290 | .alloc_inode = bfs_alloc_inode, |
291 | .destroy_inode = bfs_destroy_inode, | |
1da177e4 | 292 | .write_inode = bfs_write_inode, |
9df2f851 | 293 | .evict_inode = bfs_evict_inode, |
1da177e4 | 294 | .put_super = bfs_put_super, |
1da177e4 LT |
295 | .statfs = bfs_statfs, |
296 | }; | |
297 | ||
1da85fdf | 298 | void bfs_dump_imap(const char *prefix, struct super_block *s) |
1da177e4 | 299 | { |
fac92bec | 300 | #ifdef DEBUG |
1da177e4 LT |
301 | int i; |
302 | char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL); | |
303 | ||
304 | if (!tmpbuf) | |
305 | return; | |
f433dc56 DV |
306 | for (i = BFS_SB(s)->si_lasti; i >= 0; i--) { |
307 | if (i > PAGE_SIZE - 100) break; | |
1da177e4 LT |
308 | if (test_bit(i, BFS_SB(s)->si_imap)) |
309 | strcat(tmpbuf, "1"); | |
310 | else | |
311 | strcat(tmpbuf, "0"); | |
312 | } | |
f433dc56 DV |
313 | printf("BFS-fs: %s: lasti=%08lx <%s>\n", |
314 | prefix, BFS_SB(s)->si_lasti, tmpbuf); | |
1da177e4 LT |
315 | free_page((unsigned long)tmpbuf); |
316 | #endif | |
317 | } | |
318 | ||
319 | static int bfs_fill_super(struct super_block *s, void *data, int silent) | |
320 | { | |
4e29d50a | 321 | struct buffer_head *bh, *sbh; |
f433dc56 DV |
322 | struct bfs_super_block *bfs_sb; |
323 | struct inode *inode; | |
fac92bec | 324 | unsigned i, imap_len; |
f433dc56 | 325 | struct bfs_sb_info *info; |
5998649f | 326 | int ret = -EINVAL; |
e1f89ec9 | 327 | unsigned long i_sblock, i_eblock, i_eoff, s_size; |
1da177e4 | 328 | |
f8314dc6 | 329 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
ba13d597 | 330 | if (!info) |
1da177e4 | 331 | return -ENOMEM; |
5998649f | 332 | mutex_init(&info->bfs_lock); |
1da177e4 | 333 | s->s_fs_info = info; |
1da177e4 LT |
334 | |
335 | sb_set_blocksize(s, BFS_BSIZE); | |
336 | ||
4e29d50a AB |
337 | sbh = sb_bread(s, 0); |
338 | if (!sbh) | |
1da177e4 | 339 | goto out; |
4e29d50a | 340 | bfs_sb = (struct bfs_super_block *)sbh->b_data; |
fac92bec | 341 | if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) { |
1da177e4 LT |
342 | if (!silent) |
343 | printf("No BFS filesystem on %s (magic=%08x)\n", | |
fac92bec | 344 | s->s_id, le32_to_cpu(bfs_sb->s_magic)); |
5998649f | 345 | goto out1; |
1da177e4 LT |
346 | } |
347 | if (BFS_UNCLEAN(bfs_sb, s) && !silent) | |
348 | printf("%s is unclean, continuing\n", s->s_id); | |
349 | ||
350 | s->s_magic = BFS_MAGIC; | |
e1f89ec9 ES |
351 | |
352 | if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end)) { | |
353 | printf("Superblock is corrupted\n"); | |
5998649f | 354 | goto out1; |
e1f89ec9 ES |
355 | } |
356 | ||
f433dc56 DV |
357 | info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / |
358 | sizeof(struct bfs_inode) | |
359 | + BFS_ROOT_INO - 1; | |
360 | imap_len = (info->si_lasti / 8) + 1; | |
f8314dc6 | 361 | info->si_imap = kzalloc(imap_len, GFP_KERNEL); |
1da177e4 | 362 | if (!info->si_imap) |
5998649f | 363 | goto out1; |
f433dc56 | 364 | for (i = 0; i < BFS_ROOT_INO; i++) |
1da177e4 LT |
365 | set_bit(i, info->si_imap); |
366 | ||
367 | s->s_op = &bfs_sops; | |
e33ab086 DH |
368 | inode = bfs_iget(s, BFS_ROOT_INO); |
369 | if (IS_ERR(inode)) { | |
370 | ret = PTR_ERR(inode); | |
5998649f | 371 | goto out2; |
1da177e4 | 372 | } |
48fde701 | 373 | s->s_root = d_make_root(inode); |
1da177e4 | 374 | if (!s->s_root) { |
e33ab086 | 375 | ret = -ENOMEM; |
5998649f | 376 | goto out2; |
1da177e4 LT |
377 | } |
378 | ||
f433dc56 DV |
379 | info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS; |
380 | info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 | |
381 | - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS; | |
1da177e4 LT |
382 | info->si_freei = 0; |
383 | info->si_lf_eblk = 0; | |
50682bb4 ES |
384 | |
385 | /* can we read the last block? */ | |
386 | bh = sb_bread(s, info->si_blocks - 1); | |
387 | if (!bh) { | |
388 | printf("Last block not available: %lu\n", info->si_blocks - 1); | |
50682bb4 | 389 | ret = -EIO; |
5998649f | 390 | goto out3; |
50682bb4 ES |
391 | } |
392 | brelse(bh); | |
393 | ||
c2b513df | 394 | bh = NULL; |
f433dc56 | 395 | for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) { |
c2b513df | 396 | struct bfs_inode *di; |
f433dc56 | 397 | int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
c2b513df | 398 | int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
75b25b4c | 399 | unsigned long eblock; |
c2b513df AV |
400 | |
401 | if (!off) { | |
402 | brelse(bh); | |
403 | bh = sb_bread(s, block); | |
404 | } | |
405 | ||
406 | if (!bh) | |
407 | continue; | |
408 | ||
409 | di = (struct bfs_inode *)bh->b_data + off; | |
410 | ||
e1f89ec9 ES |
411 | /* test if filesystem is not corrupted */ |
412 | ||
413 | i_eoff = le32_to_cpu(di->i_eoffset); | |
414 | i_sblock = le32_to_cpu(di->i_sblock); | |
415 | i_eblock = le32_to_cpu(di->i_eblock); | |
416 | s_size = le32_to_cpu(bfs_sb->s_end); | |
417 | ||
418 | if (i_sblock > info->si_blocks || | |
419 | i_eblock > info->si_blocks || | |
420 | i_sblock > i_eblock || | |
421 | i_eoff > s_size || | |
422 | i_sblock * BFS_BSIZE > i_eoff) { | |
423 | ||
424 | printf("Inode 0x%08x corrupted\n", i); | |
425 | ||
426 | brelse(bh); | |
5998649f AV |
427 | ret = -EIO; |
428 | goto out3; | |
e1f89ec9 ES |
429 | } |
430 | ||
c2b513df | 431 | if (!di->i_ino) { |
1da177e4 | 432 | info->si_freei++; |
c2b513df AV |
433 | continue; |
434 | } | |
435 | set_bit(i, info->si_imap); | |
436 | info->si_freeb -= BFS_FILEBLOCKS(di); | |
437 | ||
c2b513df | 438 | eblock = le32_to_cpu(di->i_eblock); |
f433dc56 | 439 | if (eblock > info->si_lf_eblk) |
c2b513df | 440 | info->si_lf_eblk = eblock; |
1da177e4 | 441 | } |
c2b513df | 442 | brelse(bh); |
4e29d50a | 443 | brelse(sbh); |
1da85fdf | 444 | bfs_dump_imap("read_super", s); |
1da177e4 LT |
445 | return 0; |
446 | ||
5998649f AV |
447 | out3: |
448 | dput(s->s_root); | |
449 | s->s_root = NULL; | |
450 | out2: | |
451 | kfree(info->si_imap); | |
452 | out1: | |
4e29d50a | 453 | brelse(sbh); |
1da177e4 | 454 | out: |
5998649f | 455 | mutex_destroy(&info->bfs_lock); |
1da177e4 LT |
456 | kfree(info); |
457 | s->s_fs_info = NULL; | |
e33ab086 | 458 | return ret; |
1da177e4 LT |
459 | } |
460 | ||
152a0836 AV |
461 | static struct dentry *bfs_mount(struct file_system_type *fs_type, |
462 | int flags, const char *dev_name, void *data) | |
1da177e4 | 463 | { |
152a0836 | 464 | return mount_bdev(fs_type, flags, dev_name, data, bfs_fill_super); |
1da177e4 LT |
465 | } |
466 | ||
467 | static struct file_system_type bfs_fs_type = { | |
468 | .owner = THIS_MODULE, | |
469 | .name = "bfs", | |
152a0836 | 470 | .mount = bfs_mount, |
1da177e4 LT |
471 | .kill_sb = kill_block_super, |
472 | .fs_flags = FS_REQUIRES_DEV, | |
473 | }; | |
7f78e035 | 474 | MODULE_ALIAS_FS("bfs"); |
1da177e4 LT |
475 | |
476 | static int __init init_bfs_fs(void) | |
477 | { | |
478 | int err = init_inodecache(); | |
479 | if (err) | |
480 | goto out1; | |
481 | err = register_filesystem(&bfs_fs_type); | |
482 | if (err) | |
483 | goto out; | |
484 | return 0; | |
485 | out: | |
486 | destroy_inodecache(); | |
487 | out1: | |
488 | return err; | |
489 | } | |
490 | ||
491 | static void __exit exit_bfs_fs(void) | |
492 | { | |
493 | unregister_filesystem(&bfs_fs_type); | |
494 | destroy_inodecache(); | |
495 | } | |
496 | ||
497 | module_init(init_bfs_fs) | |
498 | module_exit(exit_bfs_fs) |