Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * QNX4 file system, Linux implementation. | |
3 | * | |
4 | * Version : 0.2.1 | |
5 | * | |
6 | * Using parts of the xiafs filesystem. | |
7 | * | |
8 | * History : | |
9 | * | |
10 | * 01-06-1998 by Richard Frowijn : first release. | |
11 | * 20-06-1998 by Frank Denis : Linux 2.1.99+ support, boot signature, misc. | |
12 | * 30-06-1998 by Frank Denis : first step to write inodes. | |
13 | */ | |
14 | ||
1da177e4 | 15 | #include <linux/module.h> |
1da177e4 | 16 | #include <linux/init.h> |
964f5369 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/highuid.h> |
19 | #include <linux/smp_lock.h> | |
20 | #include <linux/pagemap.h> | |
21 | #include <linux/buffer_head.h> | |
79d25767 | 22 | #include <linux/writeback.h> |
964f5369 AV |
23 | #include <linux/statfs.h> |
24 | #include "qnx4.h" | |
1da177e4 LT |
25 | |
26 | #define QNX4_VERSION 4 | |
27 | #define QNX4_BMNAME ".bitmap" | |
28 | ||
ee9b6d61 | 29 | static const struct super_operations qnx4_sops; |
1da177e4 | 30 | |
1da177e4 LT |
31 | static void qnx4_put_super(struct super_block *sb); |
32 | static struct inode *qnx4_alloc_inode(struct super_block *sb); | |
33 | static void qnx4_destroy_inode(struct inode *inode); | |
1da177e4 | 34 | static int qnx4_remount(struct super_block *sb, int *flags, char *data); |
726c3342 | 35 | static int qnx4_statfs(struct dentry *, struct kstatfs *); |
1da177e4 | 36 | |
ee9b6d61 | 37 | static const struct super_operations qnx4_sops = |
1da177e4 LT |
38 | { |
39 | .alloc_inode = qnx4_alloc_inode, | |
40 | .destroy_inode = qnx4_destroy_inode, | |
1da177e4 LT |
41 | .put_super = qnx4_put_super, |
42 | .statfs = qnx4_statfs, | |
43 | .remount_fs = qnx4_remount, | |
1da177e4 LT |
44 | }; |
45 | ||
46 | static int qnx4_remount(struct super_block *sb, int *flags, char *data) | |
47 | { | |
48 | struct qnx4_sb_info *qs; | |
49 | ||
50 | qs = qnx4_sb(sb); | |
51 | qs->Version = QNX4_VERSION; | |
1da177e4 | 52 | *flags |= MS_RDONLY; |
1da177e4 LT |
53 | return 0; |
54 | } | |
55 | ||
56 | static struct buffer_head *qnx4_getblk(struct inode *inode, int nr, | |
57 | int create) | |
58 | { | |
59 | struct buffer_head *result = NULL; | |
60 | ||
61 | if ( nr >= 0 ) | |
62 | nr = qnx4_block_map( inode, nr ); | |
63 | if (nr) { | |
64 | result = sb_getblk(inode->i_sb, nr); | |
65 | return result; | |
66 | } | |
ca120b20 | 67 | return NULL; |
1da177e4 LT |
68 | } |
69 | ||
70 | struct buffer_head *qnx4_bread(struct inode *inode, int block, int create) | |
71 | { | |
72 | struct buffer_head *bh; | |
73 | ||
74 | bh = qnx4_getblk(inode, block, create); | |
75 | if (!bh || buffer_uptodate(bh)) { | |
76 | return bh; | |
77 | } | |
78 | ll_rw_block(READ, 1, &bh); | |
79 | wait_on_buffer(bh); | |
80 | if (buffer_uptodate(bh)) { | |
81 | return bh; | |
82 | } | |
83 | brelse(bh); | |
84 | ||
85 | return NULL; | |
86 | } | |
87 | ||
88 | static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create ) | |
89 | { | |
90 | unsigned long phys; | |
91 | ||
891ddb95 | 92 | QNX4DEBUG((KERN_INFO "qnx4: qnx4_get_block inode=[%ld] iblock=[%ld]\n",inode->i_ino,iblock)); |
1da177e4 LT |
93 | |
94 | phys = qnx4_block_map( inode, iblock ); | |
95 | if ( phys ) { | |
96 | // logical block is before EOF | |
97 | map_bh(bh, inode->i_sb, phys); | |
1da177e4 LT |
98 | } |
99 | return 0; | |
100 | } | |
101 | ||
102 | unsigned long qnx4_block_map( struct inode *inode, long iblock ) | |
103 | { | |
104 | int ix; | |
105 | long offset, i_xblk; | |
106 | unsigned long block = 0; | |
107 | struct buffer_head *bh = NULL; | |
108 | struct qnx4_xblk *xblk = NULL; | |
109 | struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode); | |
75043cb5 | 110 | u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts); |
1da177e4 LT |
111 | |
112 | if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) { | |
113 | // iblock is in the first extent. This is easy. | |
114 | block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1; | |
115 | } else { | |
116 | // iblock is beyond first extent. We have to follow the extent chain. | |
117 | i_xblk = le32_to_cpu(qnx4_inode->di_xblk); | |
118 | offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size); | |
119 | ix = 0; | |
120 | while ( --nxtnt > 0 ) { | |
121 | if ( ix == 0 ) { | |
122 | // read next xtnt block. | |
123 | bh = sb_bread(inode->i_sb, i_xblk - 1); | |
124 | if ( !bh ) { | |
891ddb95 | 125 | QNX4DEBUG((KERN_ERR "qnx4: I/O error reading xtnt block [%ld])\n", i_xblk - 1)); |
1da177e4 LT |
126 | return -EIO; |
127 | } | |
128 | xblk = (struct qnx4_xblk*)bh->b_data; | |
129 | if ( memcmp( xblk->xblk_signature, "IamXblk", 7 ) ) { | |
891ddb95 | 130 | QNX4DEBUG((KERN_ERR "qnx4: block at %ld is not a valid xtnt\n", qnx4_inode->i_xblk)); |
1da177e4 LT |
131 | return -EIO; |
132 | } | |
133 | } | |
134 | if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) { | |
135 | // got it! | |
136 | block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1; | |
137 | break; | |
138 | } | |
139 | offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size); | |
140 | if ( ++ix >= xblk->xblk_num_xtnts ) { | |
141 | i_xblk = le32_to_cpu(xblk->xblk_next_xblk); | |
142 | ix = 0; | |
143 | brelse( bh ); | |
144 | bh = NULL; | |
145 | } | |
146 | } | |
147 | if ( bh ) | |
148 | brelse( bh ); | |
149 | } | |
150 | ||
891ddb95 | 151 | QNX4DEBUG((KERN_INFO "qnx4: mapping block %ld of inode %ld = %ld\n",iblock,inode->i_ino,block)); |
1da177e4 LT |
152 | return block; |
153 | } | |
154 | ||
726c3342 | 155 | static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 156 | { |
726c3342 | 157 | struct super_block *sb = dentry->d_sb; |
5b76dc06 | 158 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 159 | |
1da177e4 LT |
160 | lock_kernel(); |
161 | ||
162 | buf->f_type = sb->s_magic; | |
163 | buf->f_bsize = sb->s_blocksize; | |
164 | buf->f_blocks = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8; | |
165 | buf->f_bfree = qnx4_count_free_blocks(sb); | |
166 | buf->f_bavail = buf->f_bfree; | |
167 | buf->f_namelen = QNX4_NAME_MAX; | |
5b76dc06 CL |
168 | buf->f_fsid.val[0] = (u32)id; |
169 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
170 | |
171 | unlock_kernel(); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Check the root directory of the filesystem to make sure | |
178 | * it really _is_ a qnx4 filesystem, and to check the size | |
179 | * of the directory entry. | |
180 | */ | |
181 | static const char *qnx4_checkroot(struct super_block *sb) | |
182 | { | |
183 | struct buffer_head *bh; | |
184 | struct qnx4_inode_entry *rootdir; | |
185 | int rd, rl; | |
186 | int i, j; | |
187 | int found = 0; | |
188 | ||
189 | if (*(qnx4_sb(sb)->sb->RootDir.di_fname) != '/') { | |
190 | return "no qnx4 filesystem (no root dir)."; | |
191 | } else { | |
891ddb95 | 192 | QNX4DEBUG((KERN_NOTICE "QNX4 filesystem found on dev %s.\n", sb->s_id)); |
1da177e4 LT |
193 | rd = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_blk) - 1; |
194 | rl = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_size); | |
195 | for (j = 0; j < rl; j++) { | |
196 | bh = sb_bread(sb, rd + j); /* root dir, first block */ | |
197 | if (bh == NULL) { | |
198 | return "unable to read root entry."; | |
199 | } | |
200 | for (i = 0; i < QNX4_INODES_PER_BLOCK; i++) { | |
201 | rootdir = (struct qnx4_inode_entry *) (bh->b_data + i * QNX4_DIR_ENTRY_SIZE); | |
202 | if (rootdir->di_fname != NULL) { | |
891ddb95 | 203 | QNX4DEBUG((KERN_INFO "rootdir entry found : [%s]\n", rootdir->di_fname)); |
7e2a1083 JL |
204 | if (!strcmp(rootdir->di_fname, |
205 | QNX4_BMNAME)) { | |
1da177e4 LT |
206 | found = 1; |
207 | qnx4_sb(sb)->BitMap = kmalloc( sizeof( struct qnx4_inode_entry ), GFP_KERNEL ); | |
208 | if (!qnx4_sb(sb)->BitMap) { | |
209 | brelse (bh); | |
210 | return "not enough memory for bitmap inode"; | |
211 | } | |
212 | memcpy( qnx4_sb(sb)->BitMap, rootdir, sizeof( struct qnx4_inode_entry ) ); /* keep bitmap inode known */ | |
213 | break; | |
214 | } | |
215 | } | |
216 | } | |
217 | brelse(bh); | |
218 | if (found != 0) { | |
219 | break; | |
220 | } | |
221 | } | |
222 | if (found == 0) { | |
223 | return "bitmap file not found."; | |
224 | } | |
225 | } | |
226 | return NULL; | |
227 | } | |
228 | ||
229 | static int qnx4_fill_super(struct super_block *s, void *data, int silent) | |
230 | { | |
231 | struct buffer_head *bh; | |
232 | struct inode *root; | |
233 | const char *errmsg; | |
234 | struct qnx4_sb_info *qs; | |
2b7e5bcb | 235 | int ret = -EINVAL; |
1da177e4 | 236 | |
db719222 JB |
237 | lock_kernel(); |
238 | ||
f8314dc6 | 239 | qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL); |
db719222 JB |
240 | if (!qs) { |
241 | unlock_kernel(); | |
1da177e4 | 242 | return -ENOMEM; |
db719222 | 243 | } |
1da177e4 | 244 | s->s_fs_info = qs; |
1da177e4 LT |
245 | |
246 | sb_set_blocksize(s, QNX4_BLOCK_SIZE); | |
247 | ||
248 | /* Check the superblock signature. Since the qnx4 code is | |
249 | dangerous, we should leave as quickly as possible | |
250 | if we don't belong here... */ | |
251 | bh = sb_bread(s, 1); | |
252 | if (!bh) { | |
891ddb95 | 253 | printk(KERN_ERR "qnx4: unable to read the superblock\n"); |
1da177e4 LT |
254 | goto outnobh; |
255 | } | |
75043cb5 | 256 | if ( le32_to_cpup((__le32*) bh->b_data) != QNX4_SUPER_MAGIC ) { |
1da177e4 | 257 | if (!silent) |
891ddb95 | 258 | printk(KERN_ERR "qnx4: wrong fsid in superblock.\n"); |
1da177e4 LT |
259 | goto out; |
260 | } | |
261 | s->s_op = &qnx4_sops; | |
262 | s->s_magic = QNX4_SUPER_MAGIC; | |
1da177e4 | 263 | s->s_flags |= MS_RDONLY; /* Yup, read-only yet */ |
1da177e4 LT |
264 | qnx4_sb(s)->sb_buf = bh; |
265 | qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data; | |
266 | ||
267 | ||
268 | /* check before allocating dentries, inodes, .. */ | |
269 | errmsg = qnx4_checkroot(s); | |
270 | if (errmsg != NULL) { | |
271 | if (!silent) | |
891ddb95 | 272 | printk(KERN_ERR "qnx4: %s\n", errmsg); |
1da177e4 LT |
273 | goto out; |
274 | } | |
275 | ||
276 | /* does root not have inode number QNX4_ROOT_INO ?? */ | |
2b7e5bcb DH |
277 | root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK); |
278 | if (IS_ERR(root)) { | |
891ddb95 | 279 | printk(KERN_ERR "qnx4: get inode failed\n"); |
2b7e5bcb | 280 | ret = PTR_ERR(root); |
1da177e4 LT |
281 | goto out; |
282 | } | |
283 | ||
2b7e5bcb | 284 | ret = -ENOMEM; |
1da177e4 LT |
285 | s->s_root = d_alloc_root(root); |
286 | if (s->s_root == NULL) | |
287 | goto outi; | |
288 | ||
289 | brelse(bh); | |
290 | ||
db719222 | 291 | unlock_kernel(); |
1da177e4 LT |
292 | return 0; |
293 | ||
294 | outi: | |
295 | iput(root); | |
296 | out: | |
297 | brelse(bh); | |
298 | outnobh: | |
299 | kfree(qs); | |
300 | s->s_fs_info = NULL; | |
db719222 | 301 | unlock_kernel(); |
2b7e5bcb | 302 | return ret; |
1da177e4 LT |
303 | } |
304 | ||
305 | static void qnx4_put_super(struct super_block *sb) | |
306 | { | |
307 | struct qnx4_sb_info *qs = qnx4_sb(sb); | |
308 | kfree( qs->BitMap ); | |
309 | kfree( qs ); | |
310 | sb->s_fs_info = NULL; | |
311 | return; | |
312 | } | |
313 | ||
314 | static int qnx4_writepage(struct page *page, struct writeback_control *wbc) | |
315 | { | |
316 | return block_write_full_page(page,qnx4_get_block, wbc); | |
317 | } | |
f8706184 | 318 | |
1da177e4 LT |
319 | static int qnx4_readpage(struct file *file, struct page *page) |
320 | { | |
321 | return block_read_full_page(page,qnx4_get_block); | |
322 | } | |
f8706184 NP |
323 | |
324 | static int qnx4_write_begin(struct file *file, struct address_space *mapping, | |
325 | loff_t pos, unsigned len, unsigned flags, | |
326 | struct page **pagep, void **fsdata) | |
1da177e4 | 327 | { |
f8706184 | 328 | struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host); |
282dc178 CH |
329 | int ret; |
330 | ||
f8706184 | 331 | *pagep = NULL; |
282dc178 | 332 | ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, |
f8706184 NP |
333 | qnx4_get_block, |
334 | &qnx4_inode->mmu_private); | |
282dc178 CH |
335 | if (unlikely(ret)) { |
336 | loff_t isize = mapping->host->i_size; | |
337 | if (pos + len > isize) | |
338 | vmtruncate(mapping->host, isize); | |
339 | } | |
340 | ||
341 | return ret; | |
1da177e4 LT |
342 | } |
343 | static sector_t qnx4_bmap(struct address_space *mapping, sector_t block) | |
344 | { | |
345 | return generic_block_bmap(mapping,block,qnx4_get_block); | |
346 | } | |
f5e54d6e | 347 | static const struct address_space_operations qnx4_aops = { |
1da177e4 LT |
348 | .readpage = qnx4_readpage, |
349 | .writepage = qnx4_writepage, | |
350 | .sync_page = block_sync_page, | |
f8706184 NP |
351 | .write_begin = qnx4_write_begin, |
352 | .write_end = generic_write_end, | |
1da177e4 LT |
353 | .bmap = qnx4_bmap |
354 | }; | |
355 | ||
2b7e5bcb | 356 | struct inode *qnx4_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
357 | { |
358 | struct buffer_head *bh; | |
359 | struct qnx4_inode_entry *raw_inode; | |
2b7e5bcb DH |
360 | int block; |
361 | struct qnx4_inode_entry *qnx4_inode; | |
362 | struct inode *inode; | |
1da177e4 | 363 | |
2b7e5bcb DH |
364 | inode = iget_locked(sb, ino); |
365 | if (!inode) | |
366 | return ERR_PTR(-ENOMEM); | |
367 | if (!(inode->i_state & I_NEW)) | |
368 | return inode; | |
369 | ||
370 | qnx4_inode = qnx4_raw_inode(inode); | |
1da177e4 LT |
371 | inode->i_mode = 0; |
372 | ||
891ddb95 | 373 | QNX4DEBUG((KERN_INFO "reading inode : [%d]\n", ino)); |
1da177e4 | 374 | if (!ino) { |
2b7e5bcb DH |
375 | printk(KERN_ERR "qnx4: bad inode number on dev %s: %lu is " |
376 | "out of range\n", | |
1da177e4 | 377 | sb->s_id, ino); |
2b7e5bcb DH |
378 | iget_failed(inode); |
379 | return ERR_PTR(-EIO); | |
1da177e4 LT |
380 | } |
381 | block = ino / QNX4_INODES_PER_BLOCK; | |
382 | ||
383 | if (!(bh = sb_bread(sb, block))) { | |
891ddb95 | 384 | printk(KERN_ERR "qnx4: major problem: unable to read inode from dev " |
1da177e4 | 385 | "%s\n", sb->s_id); |
2b7e5bcb DH |
386 | iget_failed(inode); |
387 | return ERR_PTR(-EIO); | |
1da177e4 LT |
388 | } |
389 | raw_inode = ((struct qnx4_inode_entry *) bh->b_data) + | |
390 | (ino % QNX4_INODES_PER_BLOCK); | |
391 | ||
392 | inode->i_mode = le16_to_cpu(raw_inode->di_mode); | |
393 | inode->i_uid = (uid_t)le16_to_cpu(raw_inode->di_uid); | |
394 | inode->i_gid = (gid_t)le16_to_cpu(raw_inode->di_gid); | |
395 | inode->i_nlink = le16_to_cpu(raw_inode->di_nlink); | |
396 | inode->i_size = le32_to_cpu(raw_inode->di_size); | |
397 | inode->i_mtime.tv_sec = le32_to_cpu(raw_inode->di_mtime); | |
398 | inode->i_mtime.tv_nsec = 0; | |
399 | inode->i_atime.tv_sec = le32_to_cpu(raw_inode->di_atime); | |
400 | inode->i_atime.tv_nsec = 0; | |
401 | inode->i_ctime.tv_sec = le32_to_cpu(raw_inode->di_ctime); | |
402 | inode->i_ctime.tv_nsec = 0; | |
403 | inode->i_blocks = le32_to_cpu(raw_inode->di_first_xtnt.xtnt_size); | |
1da177e4 LT |
404 | |
405 | memcpy(qnx4_inode, raw_inode, QNX4_DIR_ENTRY_SIZE); | |
406 | if (S_ISREG(inode->i_mode)) { | |
945ffe54 | 407 | inode->i_fop = &generic_ro_fops; |
1da177e4 LT |
408 | inode->i_mapping->a_ops = &qnx4_aops; |
409 | qnx4_i(inode)->mmu_private = inode->i_size; | |
410 | } else if (S_ISDIR(inode->i_mode)) { | |
411 | inode->i_op = &qnx4_dir_inode_operations; | |
412 | inode->i_fop = &qnx4_dir_operations; | |
413 | } else if (S_ISLNK(inode->i_mode)) { | |
414 | inode->i_op = &page_symlink_inode_operations; | |
415 | inode->i_mapping->a_ops = &qnx4_aops; | |
416 | qnx4_i(inode)->mmu_private = inode->i_size; | |
2b7e5bcb DH |
417 | } else { |
418 | printk(KERN_ERR "qnx4: bad inode %lu on dev %s\n", | |
419 | ino, sb->s_id); | |
420 | iget_failed(inode); | |
421 | brelse(bh); | |
422 | return ERR_PTR(-EIO); | |
423 | } | |
1da177e4 | 424 | brelse(bh); |
2b7e5bcb DH |
425 | unlock_new_inode(inode); |
426 | return inode; | |
1da177e4 LT |
427 | } |
428 | ||
e18b890b | 429 | static struct kmem_cache *qnx4_inode_cachep; |
1da177e4 LT |
430 | |
431 | static struct inode *qnx4_alloc_inode(struct super_block *sb) | |
432 | { | |
433 | struct qnx4_inode_info *ei; | |
e94b1766 | 434 | ei = kmem_cache_alloc(qnx4_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
435 | if (!ei) |
436 | return NULL; | |
437 | return &ei->vfs_inode; | |
438 | } | |
439 | ||
440 | static void qnx4_destroy_inode(struct inode *inode) | |
441 | { | |
442 | kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode)); | |
443 | } | |
444 | ||
51cc5068 | 445 | static void init_once(void *foo) |
1da177e4 LT |
446 | { |
447 | struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo; | |
448 | ||
a35afb83 | 449 | inode_init_once(&ei->vfs_inode); |
1da177e4 LT |
450 | } |
451 | ||
452 | static int init_inodecache(void) | |
453 | { | |
454 | qnx4_inode_cachep = kmem_cache_create("qnx4_inode_cache", | |
455 | sizeof(struct qnx4_inode_info), | |
fffb60f9 PJ |
456 | 0, (SLAB_RECLAIM_ACCOUNT| |
457 | SLAB_MEM_SPREAD), | |
20c2df83 | 458 | init_once); |
1da177e4 LT |
459 | if (qnx4_inode_cachep == NULL) |
460 | return -ENOMEM; | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static void destroy_inodecache(void) | |
465 | { | |
1a1d92c1 | 466 | kmem_cache_destroy(qnx4_inode_cachep); |
1da177e4 LT |
467 | } |
468 | ||
454e2398 DH |
469 | static int qnx4_get_sb(struct file_system_type *fs_type, |
470 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 471 | { |
454e2398 DH |
472 | return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super, |
473 | mnt); | |
1da177e4 LT |
474 | } |
475 | ||
476 | static struct file_system_type qnx4_fs_type = { | |
477 | .owner = THIS_MODULE, | |
478 | .name = "qnx4", | |
479 | .get_sb = qnx4_get_sb, | |
480 | .kill_sb = kill_block_super, | |
481 | .fs_flags = FS_REQUIRES_DEV, | |
482 | }; | |
483 | ||
484 | static int __init init_qnx4_fs(void) | |
485 | { | |
486 | int err; | |
487 | ||
488 | err = init_inodecache(); | |
489 | if (err) | |
490 | return err; | |
491 | ||
492 | err = register_filesystem(&qnx4_fs_type); | |
493 | if (err) { | |
494 | destroy_inodecache(); | |
495 | return err; | |
496 | } | |
497 | ||
891ddb95 | 498 | printk(KERN_INFO "QNX4 filesystem 0.2.3 registered.\n"); |
1da177e4 LT |
499 | return 0; |
500 | } | |
501 | ||
502 | static void __exit exit_qnx4_fs(void) | |
503 | { | |
504 | unregister_filesystem(&qnx4_fs_type); | |
505 | destroy_inodecache(); | |
506 | } | |
507 | ||
508 | module_init(init_qnx4_fs) | |
509 | module_exit(exit_qnx4_fs) | |
510 | MODULE_LICENSE("GPL"); | |
511 |