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> | |
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 | ||
8c85e125 | 33 | static void bfs_write_super(struct super_block *s); |
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 | ||
4427f0c3 | 101 | static int bfs_write_inode(struct inode *inode, int wait) |
1da177e4 | 102 | { |
4427f0c3 | 103 | struct bfs_sb_info *info = BFS_SB(inode->i_sb); |
fac92bec AS |
104 | unsigned int ino = (u16)inode->i_ino; |
105 | unsigned long i_sblock; | |
f433dc56 DV |
106 | struct bfs_inode *di; |
107 | struct buffer_head *bh; | |
1da177e4 | 108 | int block, off; |
4427f0c3 | 109 | int err = 0; |
1da177e4 | 110 | |
fac92bec AS |
111 | dprintf("ino=%08x\n", ino); |
112 | ||
f433dc56 | 113 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) { |
fac92bec | 114 | printf("Bad inode number %s:%08x\n", inode->i_sb->s_id, ino); |
1da177e4 LT |
115 | return -EIO; |
116 | } | |
117 | ||
3f165e4c | 118 | mutex_lock(&info->bfs_lock); |
f433dc56 | 119 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
1da177e4 LT |
120 | bh = sb_bread(inode->i_sb, block); |
121 | if (!bh) { | |
f433dc56 DV |
122 | printf("Unable to read inode %s:%08x\n", |
123 | inode->i_sb->s_id, ino); | |
3f165e4c | 124 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
125 | return -EIO; |
126 | } | |
127 | ||
f433dc56 | 128 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
1da177e4 LT |
129 | di = (struct bfs_inode *)bh->b_data + off; |
130 | ||
fac92bec AS |
131 | if (ino == BFS_ROOT_INO) |
132 | di->i_vtype = cpu_to_le32(BFS_VDIR); | |
1da177e4 | 133 | else |
fac92bec AS |
134 | di->i_vtype = cpu_to_le32(BFS_VREG); |
135 | ||
136 | di->i_ino = cpu_to_le16(ino); | |
137 | di->i_mode = cpu_to_le32(inode->i_mode); | |
138 | di->i_uid = cpu_to_le32(inode->i_uid); | |
139 | di->i_gid = cpu_to_le32(inode->i_gid); | |
140 | di->i_nlink = cpu_to_le32(inode->i_nlink); | |
141 | di->i_atime = cpu_to_le32(inode->i_atime.tv_sec); | |
142 | di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); | |
143 | di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); | |
144 | i_sblock = BFS_I(inode)->i_sblock; | |
145 | di->i_sblock = cpu_to_le32(i_sblock); | |
146 | di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock); | |
147 | di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1); | |
1da177e4 LT |
148 | |
149 | mark_buffer_dirty(bh); | |
4427f0c3 AV |
150 | if (wait) { |
151 | sync_dirty_buffer(bh); | |
152 | if (buffer_req(bh) && !buffer_uptodate(bh)) | |
153 | err = -EIO; | |
154 | } | |
1da177e4 | 155 | brelse(bh); |
3f165e4c | 156 | mutex_unlock(&info->bfs_lock); |
4427f0c3 | 157 | return err; |
1da177e4 LT |
158 | } |
159 | ||
f433dc56 | 160 | static void bfs_delete_inode(struct inode *inode) |
1da177e4 LT |
161 | { |
162 | unsigned long ino = inode->i_ino; | |
f433dc56 DV |
163 | struct bfs_inode *di; |
164 | struct buffer_head *bh; | |
1da177e4 | 165 | int block, off; |
f433dc56 DV |
166 | struct super_block *s = inode->i_sb; |
167 | struct bfs_sb_info *info = BFS_SB(s); | |
168 | struct bfs_inode_info *bi = BFS_I(inode); | |
1da177e4 | 169 | |
fac92bec | 170 | dprintf("ino=%08lx\n", ino); |
1da177e4 | 171 | |
fef26658 MF |
172 | truncate_inode_pages(&inode->i_data, 0); |
173 | ||
f433dc56 | 174 | if ((ino < BFS_ROOT_INO) || (ino > info->si_lasti)) { |
fac92bec | 175 | printf("invalid ino=%08lx\n", ino); |
1da177e4 LT |
176 | return; |
177 | } | |
178 | ||
179 | inode->i_size = 0; | |
180 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
3f165e4c | 181 | mutex_lock(&info->bfs_lock); |
1da177e4 | 182 | mark_inode_dirty(inode); |
f433dc56 DV |
183 | |
184 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; | |
1da177e4 LT |
185 | bh = sb_bread(s, block); |
186 | if (!bh) { | |
f433dc56 DV |
187 | printf("Unable to read inode %s:%08lx\n", |
188 | inode->i_sb->s_id, ino); | |
3f165e4c | 189 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
190 | return; |
191 | } | |
f433dc56 DV |
192 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
193 | di = (struct bfs_inode *)bh->b_data + off; | |
194 | memset((void *)di, 0, sizeof(struct bfs_inode)); | |
195 | mark_buffer_dirty(bh); | |
196 | brelse(bh); | |
197 | ||
fac92bec | 198 | if (bi->i_dsk_ino) { |
7e46aa5c AV |
199 | if (bi->i_sblock) |
200 | info->si_freeb += bi->i_eblock + 1 - bi->i_sblock; | |
1da177e4 | 201 | info->si_freei++; |
fac92bec | 202 | clear_bit(ino, info->si_imap); |
1da177e4 | 203 | dump_imap("delete_inode", s); |
fac92bec | 204 | } |
1da177e4 | 205 | |
f433dc56 DV |
206 | /* |
207 | * If this was the last file, make the previous block | |
208 | * "last block of the last file" even if there is no | |
209 | * real file there, saves us 1 gap. | |
210 | */ | |
211 | if (info->si_lf_eblk == bi->i_eblock) { | |
212 | info->si_lf_eblk = bi->i_sblock - 1; | |
1da177e4 LT |
213 | mark_buffer_dirty(info->si_sbh); |
214 | } | |
3f165e4c | 215 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
216 | clear_inode(inode); |
217 | } | |
218 | ||
561e47ce CH |
219 | static int bfs_sync_fs(struct super_block *sb, int wait) |
220 | { | |
221 | struct bfs_sb_info *info = BFS_SB(sb); | |
222 | ||
223 | mutex_lock(&info->bfs_lock); | |
224 | mark_buffer_dirty(info->si_sbh); | |
225 | sb->s_dirt = 0; | |
226 | mutex_unlock(&info->bfs_lock); | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static void bfs_write_super(struct super_block *sb) | |
232 | { | |
233 | if (!(sb->s_flags & MS_RDONLY)) | |
234 | bfs_sync_fs(sb, 1); | |
235 | else | |
236 | sb->s_dirt = 0; | |
237 | } | |
238 | ||
1da177e4 LT |
239 | static void bfs_put_super(struct super_block *s) |
240 | { | |
241 | struct bfs_sb_info *info = BFS_SB(s); | |
3f165e4c | 242 | |
e1f89ec9 ES |
243 | if (!info) |
244 | return; | |
245 | ||
6cfd0148 CH |
246 | lock_kernel(); |
247 | ||
8c85e125 CH |
248 | if (s->s_dirt) |
249 | bfs_write_super(s); | |
250 | ||
1da177e4 | 251 | brelse(info->si_sbh); |
3f165e4c | 252 | mutex_destroy(&info->bfs_lock); |
1da177e4 LT |
253 | kfree(info->si_imap); |
254 | kfree(info); | |
255 | s->s_fs_info = NULL; | |
6cfd0148 CH |
256 | |
257 | unlock_kernel(); | |
1da177e4 LT |
258 | } |
259 | ||
726c3342 | 260 | static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 261 | { |
726c3342 | 262 | struct super_block *s = dentry->d_sb; |
1da177e4 LT |
263 | struct bfs_sb_info *info = BFS_SB(s); |
264 | u64 id = huge_encode_dev(s->s_bdev->bd_dev); | |
265 | buf->f_type = BFS_MAGIC; | |
266 | buf->f_bsize = s->s_blocksize; | |
267 | buf->f_blocks = info->si_blocks; | |
268 | buf->f_bfree = buf->f_bavail = info->si_freeb; | |
269 | buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO; | |
270 | buf->f_ffree = info->si_freei; | |
271 | buf->f_fsid.val[0] = (u32)id; | |
272 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
273 | buf->f_namelen = BFS_NAMELEN; | |
274 | return 0; | |
275 | } | |
276 | ||
f433dc56 | 277 | static struct kmem_cache *bfs_inode_cachep; |
1da177e4 LT |
278 | |
279 | static struct inode *bfs_alloc_inode(struct super_block *sb) | |
280 | { | |
281 | struct bfs_inode_info *bi; | |
e94b1766 | 282 | bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
283 | if (!bi) |
284 | return NULL; | |
285 | return &bi->vfs_inode; | |
286 | } | |
287 | ||
288 | static void bfs_destroy_inode(struct inode *inode) | |
289 | { | |
290 | kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); | |
291 | } | |
292 | ||
51cc5068 | 293 | static void init_once(void *foo) |
1da177e4 LT |
294 | { |
295 | struct bfs_inode_info *bi = foo; | |
296 | ||
a35afb83 | 297 | inode_init_once(&bi->vfs_inode); |
1da177e4 | 298 | } |
20c2df83 | 299 | |
1da177e4 LT |
300 | static int init_inodecache(void) |
301 | { | |
302 | bfs_inode_cachep = kmem_cache_create("bfs_inode_cache", | |
303 | sizeof(struct bfs_inode_info), | |
fffb60f9 PJ |
304 | 0, (SLAB_RECLAIM_ACCOUNT| |
305 | SLAB_MEM_SPREAD), | |
20c2df83 | 306 | init_once); |
1da177e4 LT |
307 | if (bfs_inode_cachep == NULL) |
308 | return -ENOMEM; | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static void destroy_inodecache(void) | |
313 | { | |
1a1d92c1 | 314 | kmem_cache_destroy(bfs_inode_cachep); |
1da177e4 LT |
315 | } |
316 | ||
ee9b6d61 | 317 | static const struct super_operations bfs_sops = { |
1da177e4 LT |
318 | .alloc_inode = bfs_alloc_inode, |
319 | .destroy_inode = bfs_destroy_inode, | |
1da177e4 LT |
320 | .write_inode = bfs_write_inode, |
321 | .delete_inode = bfs_delete_inode, | |
322 | .put_super = bfs_put_super, | |
323 | .write_super = bfs_write_super, | |
561e47ce | 324 | .sync_fs = bfs_sync_fs, |
1da177e4 LT |
325 | .statfs = bfs_statfs, |
326 | }; | |
327 | ||
f433dc56 | 328 | void dump_imap(const char *prefix, struct super_block *s) |
1da177e4 | 329 | { |
fac92bec | 330 | #ifdef DEBUG |
1da177e4 LT |
331 | int i; |
332 | char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL); | |
333 | ||
334 | if (!tmpbuf) | |
335 | return; | |
f433dc56 DV |
336 | for (i = BFS_SB(s)->si_lasti; i >= 0; i--) { |
337 | if (i > PAGE_SIZE - 100) break; | |
1da177e4 LT |
338 | if (test_bit(i, BFS_SB(s)->si_imap)) |
339 | strcat(tmpbuf, "1"); | |
340 | else | |
341 | strcat(tmpbuf, "0"); | |
342 | } | |
f433dc56 DV |
343 | printf("BFS-fs: %s: lasti=%08lx <%s>\n", |
344 | prefix, BFS_SB(s)->si_lasti, tmpbuf); | |
1da177e4 LT |
345 | free_page((unsigned long)tmpbuf); |
346 | #endif | |
347 | } | |
348 | ||
349 | static int bfs_fill_super(struct super_block *s, void *data, int silent) | |
350 | { | |
f433dc56 DV |
351 | struct buffer_head *bh; |
352 | struct bfs_super_block *bfs_sb; | |
353 | struct inode *inode; | |
fac92bec | 354 | unsigned i, imap_len; |
f433dc56 | 355 | struct bfs_sb_info *info; |
e33ab086 | 356 | long ret = -EINVAL; |
e1f89ec9 | 357 | unsigned long i_sblock, i_eblock, i_eoff, s_size; |
1da177e4 | 358 | |
f8314dc6 | 359 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
360 | if (!info) |
361 | return -ENOMEM; | |
362 | s->s_fs_info = info; | |
1da177e4 LT |
363 | |
364 | sb_set_blocksize(s, BFS_BSIZE); | |
365 | ||
366 | bh = sb_bread(s, 0); | |
367 | if(!bh) | |
368 | goto out; | |
369 | bfs_sb = (struct bfs_super_block *)bh->b_data; | |
fac92bec | 370 | if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) { |
1da177e4 LT |
371 | if (!silent) |
372 | printf("No BFS filesystem on %s (magic=%08x)\n", | |
fac92bec | 373 | s->s_id, le32_to_cpu(bfs_sb->s_magic)); |
1da177e4 LT |
374 | goto out; |
375 | } | |
376 | if (BFS_UNCLEAN(bfs_sb, s) && !silent) | |
377 | printf("%s is unclean, continuing\n", s->s_id); | |
378 | ||
379 | s->s_magic = BFS_MAGIC; | |
1da177e4 | 380 | info->si_sbh = bh; |
e1f89ec9 ES |
381 | |
382 | if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end)) { | |
383 | printf("Superblock is corrupted\n"); | |
384 | goto out; | |
385 | } | |
386 | ||
f433dc56 DV |
387 | info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / |
388 | sizeof(struct bfs_inode) | |
389 | + BFS_ROOT_INO - 1; | |
390 | imap_len = (info->si_lasti / 8) + 1; | |
f8314dc6 | 391 | info->si_imap = kzalloc(imap_len, GFP_KERNEL); |
1da177e4 LT |
392 | if (!info->si_imap) |
393 | goto out; | |
f433dc56 | 394 | for (i = 0; i < BFS_ROOT_INO; i++) |
1da177e4 LT |
395 | set_bit(i, info->si_imap); |
396 | ||
397 | s->s_op = &bfs_sops; | |
e33ab086 DH |
398 | inode = bfs_iget(s, BFS_ROOT_INO); |
399 | if (IS_ERR(inode)) { | |
400 | ret = PTR_ERR(inode); | |
1da177e4 LT |
401 | kfree(info->si_imap); |
402 | goto out; | |
403 | } | |
404 | s->s_root = d_alloc_root(inode); | |
405 | if (!s->s_root) { | |
406 | iput(inode); | |
e33ab086 | 407 | ret = -ENOMEM; |
1da177e4 LT |
408 | kfree(info->si_imap); |
409 | goto out; | |
410 | } | |
411 | ||
f433dc56 DV |
412 | info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS; |
413 | info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 | |
414 | - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS; | |
1da177e4 LT |
415 | info->si_freei = 0; |
416 | info->si_lf_eblk = 0; | |
50682bb4 ES |
417 | |
418 | /* can we read the last block? */ | |
419 | bh = sb_bread(s, info->si_blocks - 1); | |
420 | if (!bh) { | |
421 | printf("Last block not available: %lu\n", info->si_blocks - 1); | |
422 | iput(inode); | |
423 | ret = -EIO; | |
424 | kfree(info->si_imap); | |
425 | goto out; | |
426 | } | |
427 | brelse(bh); | |
428 | ||
c2b513df | 429 | bh = NULL; |
f433dc56 | 430 | for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) { |
c2b513df | 431 | struct bfs_inode *di; |
f433dc56 | 432 | int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
c2b513df | 433 | int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
75b25b4c | 434 | unsigned long eblock; |
c2b513df AV |
435 | |
436 | if (!off) { | |
437 | brelse(bh); | |
438 | bh = sb_bread(s, block); | |
439 | } | |
440 | ||
441 | if (!bh) | |
442 | continue; | |
443 | ||
444 | di = (struct bfs_inode *)bh->b_data + off; | |
445 | ||
e1f89ec9 ES |
446 | /* test if filesystem is not corrupted */ |
447 | ||
448 | i_eoff = le32_to_cpu(di->i_eoffset); | |
449 | i_sblock = le32_to_cpu(di->i_sblock); | |
450 | i_eblock = le32_to_cpu(di->i_eblock); | |
451 | s_size = le32_to_cpu(bfs_sb->s_end); | |
452 | ||
453 | if (i_sblock > info->si_blocks || | |
454 | i_eblock > info->si_blocks || | |
455 | i_sblock > i_eblock || | |
456 | i_eoff > s_size || | |
457 | i_sblock * BFS_BSIZE > i_eoff) { | |
458 | ||
459 | printf("Inode 0x%08x corrupted\n", i); | |
460 | ||
461 | brelse(bh); | |
462 | s->s_root = NULL; | |
463 | kfree(info->si_imap); | |
464 | kfree(info); | |
465 | s->s_fs_info = NULL; | |
466 | return -EIO; | |
467 | } | |
468 | ||
c2b513df | 469 | if (!di->i_ino) { |
1da177e4 | 470 | info->si_freei++; |
c2b513df AV |
471 | continue; |
472 | } | |
473 | set_bit(i, info->si_imap); | |
474 | info->si_freeb -= BFS_FILEBLOCKS(di); | |
475 | ||
c2b513df | 476 | eblock = le32_to_cpu(di->i_eblock); |
f433dc56 | 477 | if (eblock > info->si_lf_eblk) |
c2b513df | 478 | info->si_lf_eblk = eblock; |
1da177e4 | 479 | } |
c2b513df | 480 | brelse(bh); |
1da177e4 | 481 | if (!(s->s_flags & MS_RDONLY)) { |
c2b513df | 482 | mark_buffer_dirty(info->si_sbh); |
1da177e4 LT |
483 | s->s_dirt = 1; |
484 | } | |
485 | dump_imap("read_super", s); | |
3f165e4c | 486 | mutex_init(&info->bfs_lock); |
1da177e4 LT |
487 | return 0; |
488 | ||
489 | out: | |
490 | brelse(bh); | |
491 | kfree(info); | |
492 | s->s_fs_info = NULL; | |
e33ab086 | 493 | return ret; |
1da177e4 LT |
494 | } |
495 | ||
454e2398 DH |
496 | static int bfs_get_sb(struct file_system_type *fs_type, |
497 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 498 | { |
454e2398 | 499 | return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super, mnt); |
1da177e4 LT |
500 | } |
501 | ||
502 | static struct file_system_type bfs_fs_type = { | |
503 | .owner = THIS_MODULE, | |
504 | .name = "bfs", | |
505 | .get_sb = bfs_get_sb, | |
506 | .kill_sb = kill_block_super, | |
507 | .fs_flags = FS_REQUIRES_DEV, | |
508 | }; | |
509 | ||
510 | static int __init init_bfs_fs(void) | |
511 | { | |
512 | int err = init_inodecache(); | |
513 | if (err) | |
514 | goto out1; | |
515 | err = register_filesystem(&bfs_fs_type); | |
516 | if (err) | |
517 | goto out; | |
518 | return 0; | |
519 | out: | |
520 | destroy_inodecache(); | |
521 | out1: | |
522 | return err; | |
523 | } | |
524 | ||
525 | static void __exit exit_bfs_fs(void) | |
526 | { | |
527 | unregister_filesystem(&bfs_fs_type); | |
528 | destroy_inodecache(); | |
529 | } | |
530 | ||
531 | module_init(init_bfs_fs) | |
532 | module_exit(exit_bfs_fs) |