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Commit | Line | Data |
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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 LT |
15 | #include <linux/module.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/fs.h> | |
21 | #include <linux/qnx4_fs.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/highuid.h> | |
24 | #include <linux/smp_lock.h> | |
25 | #include <linux/pagemap.h> | |
26 | #include <linux/buffer_head.h> | |
79d25767 | 27 | #include <linux/writeback.h> |
1da177e4 LT |
28 | #include <linux/vfs.h> |
29 | #include <asm/uaccess.h> | |
30 | ||
31 | #define QNX4_VERSION 4 | |
32 | #define QNX4_BMNAME ".bitmap" | |
33 | ||
ee9b6d61 | 34 | static const struct super_operations qnx4_sops; |
1da177e4 LT |
35 | |
36 | #ifdef CONFIG_QNX4FS_RW | |
37 | ||
1da177e4 LT |
38 | static void qnx4_delete_inode(struct inode *inode) |
39 | { | |
40 | QNX4DEBUG(("qnx4: deleting inode [%lu]\n", (unsigned long) inode->i_ino)); | |
fef26658 | 41 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
42 | inode->i_size = 0; |
43 | qnx4_truncate(inode); | |
44 | lock_kernel(); | |
45 | qnx4_free_inode(inode); | |
46 | unlock_kernel(); | |
47 | } | |
48 | ||
79d25767 | 49 | static int qnx4_write_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
50 | { |
51 | struct qnx4_inode_entry *raw_inode; | |
52 | int block, ino; | |
53 | struct buffer_head *bh; | |
54 | ino = inode->i_ino; | |
55 | ||
56 | QNX4DEBUG(("qnx4: write inode 1.\n")); | |
57 | if (inode->i_nlink == 0) { | |
58 | return 0; | |
59 | } | |
60 | if (!ino) { | |
61 | printk("qnx4: bad inode number on dev %s: %d is out of range\n", | |
62 | inode->i_sb->s_id, ino); | |
63 | return -EIO; | |
64 | } | |
65 | QNX4DEBUG(("qnx4: write inode 2.\n")); | |
66 | block = ino / QNX4_INODES_PER_BLOCK; | |
67 | lock_kernel(); | |
68 | if (!(bh = sb_bread(inode->i_sb, block))) { | |
69 | printk("qnx4: major problem: unable to read inode from dev " | |
70 | "%s\n", inode->i_sb->s_id); | |
71 | unlock_kernel(); | |
72 | return -EIO; | |
73 | } | |
74 | raw_inode = ((struct qnx4_inode_entry *) bh->b_data) + | |
75 | (ino % QNX4_INODES_PER_BLOCK); | |
76 | raw_inode->di_mode = cpu_to_le16(inode->i_mode); | |
77 | raw_inode->di_uid = cpu_to_le16(fs_high2lowuid(inode->i_uid)); | |
78 | raw_inode->di_gid = cpu_to_le16(fs_high2lowgid(inode->i_gid)); | |
79 | raw_inode->di_nlink = cpu_to_le16(inode->i_nlink); | |
80 | raw_inode->di_size = cpu_to_le32(inode->i_size); | |
81 | raw_inode->di_mtime = cpu_to_le32(inode->i_mtime.tv_sec); | |
82 | raw_inode->di_atime = cpu_to_le32(inode->i_atime.tv_sec); | |
83 | raw_inode->di_ctime = cpu_to_le32(inode->i_ctime.tv_sec); | |
84 | raw_inode->di_first_xtnt.xtnt_size = cpu_to_le32(inode->i_blocks); | |
85 | mark_buffer_dirty(bh); | |
79d25767 AV |
86 | if (do_sync) { |
87 | sync_dirty_buffer(bh); | |
88 | if (buffer_req(bh) && !buffer_uptodate(bh)) { | |
89 | printk("qnx4: IO error syncing inode [%s:%08x]\n", | |
90 | inode->i_sb->s_id, ino); | |
91 | brelse(bh); | |
92 | unlock_kernel(); | |
93 | return -EIO; | |
94 | } | |
95 | } | |
1da177e4 LT |
96 | brelse(bh); |
97 | unlock_kernel(); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | #endif | |
102 | ||
103 | static void qnx4_put_super(struct super_block *sb); | |
104 | static struct inode *qnx4_alloc_inode(struct super_block *sb); | |
105 | static void qnx4_destroy_inode(struct inode *inode); | |
1da177e4 | 106 | static int qnx4_remount(struct super_block *sb, int *flags, char *data); |
726c3342 | 107 | static int qnx4_statfs(struct dentry *, struct kstatfs *); |
1da177e4 | 108 | |
ee9b6d61 | 109 | static const struct super_operations qnx4_sops = |
1da177e4 LT |
110 | { |
111 | .alloc_inode = qnx4_alloc_inode, | |
112 | .destroy_inode = qnx4_destroy_inode, | |
1da177e4 LT |
113 | .put_super = qnx4_put_super, |
114 | .statfs = qnx4_statfs, | |
115 | .remount_fs = qnx4_remount, | |
116 | #ifdef CONFIG_QNX4FS_RW | |
117 | .write_inode = qnx4_write_inode, | |
118 | .delete_inode = qnx4_delete_inode, | |
1da177e4 LT |
119 | #endif |
120 | }; | |
121 | ||
122 | static int qnx4_remount(struct super_block *sb, int *flags, char *data) | |
123 | { | |
124 | struct qnx4_sb_info *qs; | |
125 | ||
126 | qs = qnx4_sb(sb); | |
127 | qs->Version = QNX4_VERSION; | |
128 | #ifndef CONFIG_QNX4FS_RW | |
129 | *flags |= MS_RDONLY; | |
130 | #endif | |
131 | if (*flags & MS_RDONLY) { | |
132 | return 0; | |
133 | } | |
134 | ||
135 | mark_buffer_dirty(qs->sb_buf); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static struct buffer_head *qnx4_getblk(struct inode *inode, int nr, | |
141 | int create) | |
142 | { | |
143 | struct buffer_head *result = NULL; | |
144 | ||
145 | if ( nr >= 0 ) | |
146 | nr = qnx4_block_map( inode, nr ); | |
147 | if (nr) { | |
148 | result = sb_getblk(inode->i_sb, nr); | |
149 | return result; | |
150 | } | |
151 | if (!create) { | |
152 | return NULL; | |
153 | } | |
154 | #if 0 | |
155 | tmp = qnx4_new_block(inode->i_sb); | |
156 | if (!tmp) { | |
157 | return NULL; | |
158 | } | |
159 | result = sb_getblk(inode->i_sb, tmp); | |
160 | if (tst) { | |
161 | qnx4_free_block(inode->i_sb, tmp); | |
162 | brelse(result); | |
163 | goto repeat; | |
164 | } | |
165 | tst = tmp; | |
166 | #endif | |
167 | inode->i_ctime = CURRENT_TIME_SEC; | |
168 | mark_inode_dirty(inode); | |
169 | return result; | |
170 | } | |
171 | ||
172 | struct buffer_head *qnx4_bread(struct inode *inode, int block, int create) | |
173 | { | |
174 | struct buffer_head *bh; | |
175 | ||
176 | bh = qnx4_getblk(inode, block, create); | |
177 | if (!bh || buffer_uptodate(bh)) { | |
178 | return bh; | |
179 | } | |
180 | ll_rw_block(READ, 1, &bh); | |
181 | wait_on_buffer(bh); | |
182 | if (buffer_uptodate(bh)) { | |
183 | return bh; | |
184 | } | |
185 | brelse(bh); | |
186 | ||
187 | return NULL; | |
188 | } | |
189 | ||
190 | static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create ) | |
191 | { | |
192 | unsigned long phys; | |
193 | ||
194 | QNX4DEBUG(("qnx4: qnx4_get_block inode=[%ld] iblock=[%ld]\n",inode->i_ino,iblock)); | |
195 | ||
196 | phys = qnx4_block_map( inode, iblock ); | |
197 | if ( phys ) { | |
198 | // logical block is before EOF | |
199 | map_bh(bh, inode->i_sb, phys); | |
200 | } else if ( create ) { | |
201 | // to be done. | |
202 | } | |
203 | return 0; | |
204 | } | |
205 | ||
206 | unsigned long qnx4_block_map( struct inode *inode, long iblock ) | |
207 | { | |
208 | int ix; | |
209 | long offset, i_xblk; | |
210 | unsigned long block = 0; | |
211 | struct buffer_head *bh = NULL; | |
212 | struct qnx4_xblk *xblk = NULL; | |
213 | struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode); | |
75043cb5 | 214 | u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts); |
1da177e4 LT |
215 | |
216 | if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) { | |
217 | // iblock is in the first extent. This is easy. | |
218 | block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1; | |
219 | } else { | |
220 | // iblock is beyond first extent. We have to follow the extent chain. | |
221 | i_xblk = le32_to_cpu(qnx4_inode->di_xblk); | |
222 | offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size); | |
223 | ix = 0; | |
224 | while ( --nxtnt > 0 ) { | |
225 | if ( ix == 0 ) { | |
226 | // read next xtnt block. | |
227 | bh = sb_bread(inode->i_sb, i_xblk - 1); | |
228 | if ( !bh ) { | |
229 | QNX4DEBUG(("qnx4: I/O error reading xtnt block [%ld])\n", i_xblk - 1)); | |
230 | return -EIO; | |
231 | } | |
232 | xblk = (struct qnx4_xblk*)bh->b_data; | |
233 | if ( memcmp( xblk->xblk_signature, "IamXblk", 7 ) ) { | |
234 | QNX4DEBUG(("qnx4: block at %ld is not a valid xtnt\n", qnx4_inode->i_xblk)); | |
235 | return -EIO; | |
236 | } | |
237 | } | |
238 | if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) { | |
239 | // got it! | |
240 | block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1; | |
241 | break; | |
242 | } | |
243 | offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size); | |
244 | if ( ++ix >= xblk->xblk_num_xtnts ) { | |
245 | i_xblk = le32_to_cpu(xblk->xblk_next_xblk); | |
246 | ix = 0; | |
247 | brelse( bh ); | |
248 | bh = NULL; | |
249 | } | |
250 | } | |
251 | if ( bh ) | |
252 | brelse( bh ); | |
253 | } | |
254 | ||
255 | QNX4DEBUG(("qnx4: mapping block %ld of inode %ld = %ld\n",iblock,inode->i_ino,block)); | |
256 | return block; | |
257 | } | |
258 | ||
726c3342 | 259 | static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 260 | { |
726c3342 | 261 | struct super_block *sb = dentry->d_sb; |
5b76dc06 | 262 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 263 | |
1da177e4 LT |
264 | lock_kernel(); |
265 | ||
266 | buf->f_type = sb->s_magic; | |
267 | buf->f_bsize = sb->s_blocksize; | |
268 | buf->f_blocks = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8; | |
269 | buf->f_bfree = qnx4_count_free_blocks(sb); | |
270 | buf->f_bavail = buf->f_bfree; | |
271 | buf->f_namelen = QNX4_NAME_MAX; | |
5b76dc06 CL |
272 | buf->f_fsid.val[0] = (u32)id; |
273 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
274 | |
275 | unlock_kernel(); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | /* | |
281 | * Check the root directory of the filesystem to make sure | |
282 | * it really _is_ a qnx4 filesystem, and to check the size | |
283 | * of the directory entry. | |
284 | */ | |
285 | static const char *qnx4_checkroot(struct super_block *sb) | |
286 | { | |
287 | struct buffer_head *bh; | |
288 | struct qnx4_inode_entry *rootdir; | |
289 | int rd, rl; | |
290 | int i, j; | |
291 | int found = 0; | |
292 | ||
293 | if (*(qnx4_sb(sb)->sb->RootDir.di_fname) != '/') { | |
294 | return "no qnx4 filesystem (no root dir)."; | |
295 | } else { | |
296 | QNX4DEBUG(("QNX4 filesystem found on dev %s.\n", sb->s_id)); | |
297 | rd = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_blk) - 1; | |
298 | rl = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_size); | |
299 | for (j = 0; j < rl; j++) { | |
300 | bh = sb_bread(sb, rd + j); /* root dir, first block */ | |
301 | if (bh == NULL) { | |
302 | return "unable to read root entry."; | |
303 | } | |
304 | for (i = 0; i < QNX4_INODES_PER_BLOCK; i++) { | |
305 | rootdir = (struct qnx4_inode_entry *) (bh->b_data + i * QNX4_DIR_ENTRY_SIZE); | |
306 | if (rootdir->di_fname != NULL) { | |
307 | QNX4DEBUG(("Rootdir entry found : [%s]\n", rootdir->di_fname)); | |
308 | if (!strncmp(rootdir->di_fname, QNX4_BMNAME, sizeof QNX4_BMNAME)) { | |
309 | found = 1; | |
310 | qnx4_sb(sb)->BitMap = kmalloc( sizeof( struct qnx4_inode_entry ), GFP_KERNEL ); | |
311 | if (!qnx4_sb(sb)->BitMap) { | |
312 | brelse (bh); | |
313 | return "not enough memory for bitmap inode"; | |
314 | } | |
315 | memcpy( qnx4_sb(sb)->BitMap, rootdir, sizeof( struct qnx4_inode_entry ) ); /* keep bitmap inode known */ | |
316 | break; | |
317 | } | |
318 | } | |
319 | } | |
320 | brelse(bh); | |
321 | if (found != 0) { | |
322 | break; | |
323 | } | |
324 | } | |
325 | if (found == 0) { | |
326 | return "bitmap file not found."; | |
327 | } | |
328 | } | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | static int qnx4_fill_super(struct super_block *s, void *data, int silent) | |
333 | { | |
334 | struct buffer_head *bh; | |
335 | struct inode *root; | |
336 | const char *errmsg; | |
337 | struct qnx4_sb_info *qs; | |
2b7e5bcb | 338 | int ret = -EINVAL; |
1da177e4 | 339 | |
f8314dc6 | 340 | qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL); |
1da177e4 LT |
341 | if (!qs) |
342 | return -ENOMEM; | |
343 | s->s_fs_info = qs; | |
1da177e4 LT |
344 | |
345 | sb_set_blocksize(s, QNX4_BLOCK_SIZE); | |
346 | ||
347 | /* Check the superblock signature. Since the qnx4 code is | |
348 | dangerous, we should leave as quickly as possible | |
349 | if we don't belong here... */ | |
350 | bh = sb_bread(s, 1); | |
351 | if (!bh) { | |
352 | printk("qnx4: unable to read the superblock\n"); | |
353 | goto outnobh; | |
354 | } | |
75043cb5 | 355 | if ( le32_to_cpup((__le32*) bh->b_data) != QNX4_SUPER_MAGIC ) { |
1da177e4 LT |
356 | if (!silent) |
357 | printk("qnx4: wrong fsid in superblock.\n"); | |
358 | goto out; | |
359 | } | |
360 | s->s_op = &qnx4_sops; | |
361 | s->s_magic = QNX4_SUPER_MAGIC; | |
362 | #ifndef CONFIG_QNX4FS_RW | |
363 | s->s_flags |= MS_RDONLY; /* Yup, read-only yet */ | |
364 | #endif | |
365 | qnx4_sb(s)->sb_buf = bh; | |
366 | qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data; | |
367 | ||
368 | ||
369 | /* check before allocating dentries, inodes, .. */ | |
370 | errmsg = qnx4_checkroot(s); | |
371 | if (errmsg != NULL) { | |
372 | if (!silent) | |
373 | printk("qnx4: %s\n", errmsg); | |
374 | goto out; | |
375 | } | |
376 | ||
377 | /* does root not have inode number QNX4_ROOT_INO ?? */ | |
2b7e5bcb DH |
378 | root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK); |
379 | if (IS_ERR(root)) { | |
1da177e4 | 380 | printk("qnx4: get inode failed\n"); |
2b7e5bcb | 381 | ret = PTR_ERR(root); |
1da177e4 LT |
382 | goto out; |
383 | } | |
384 | ||
2b7e5bcb | 385 | ret = -ENOMEM; |
1da177e4 LT |
386 | s->s_root = d_alloc_root(root); |
387 | if (s->s_root == NULL) | |
388 | goto outi; | |
389 | ||
390 | brelse(bh); | |
391 | ||
392 | return 0; | |
393 | ||
394 | outi: | |
395 | iput(root); | |
396 | out: | |
397 | brelse(bh); | |
398 | outnobh: | |
399 | kfree(qs); | |
400 | s->s_fs_info = NULL; | |
2b7e5bcb | 401 | return ret; |
1da177e4 LT |
402 | } |
403 | ||
404 | static void qnx4_put_super(struct super_block *sb) | |
405 | { | |
406 | struct qnx4_sb_info *qs = qnx4_sb(sb); | |
407 | kfree( qs->BitMap ); | |
408 | kfree( qs ); | |
409 | sb->s_fs_info = NULL; | |
410 | return; | |
411 | } | |
412 | ||
413 | static int qnx4_writepage(struct page *page, struct writeback_control *wbc) | |
414 | { | |
415 | return block_write_full_page(page,qnx4_get_block, wbc); | |
416 | } | |
f8706184 | 417 | |
1da177e4 LT |
418 | static int qnx4_readpage(struct file *file, struct page *page) |
419 | { | |
420 | return block_read_full_page(page,qnx4_get_block); | |
421 | } | |
f8706184 NP |
422 | |
423 | static int qnx4_write_begin(struct file *file, struct address_space *mapping, | |
424 | loff_t pos, unsigned len, unsigned flags, | |
425 | struct page **pagep, void **fsdata) | |
1da177e4 | 426 | { |
f8706184 NP |
427 | struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host); |
428 | *pagep = NULL; | |
429 | return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
430 | qnx4_get_block, | |
431 | &qnx4_inode->mmu_private); | |
1da177e4 LT |
432 | } |
433 | static sector_t qnx4_bmap(struct address_space *mapping, sector_t block) | |
434 | { | |
435 | return generic_block_bmap(mapping,block,qnx4_get_block); | |
436 | } | |
f5e54d6e | 437 | static const struct address_space_operations qnx4_aops = { |
1da177e4 LT |
438 | .readpage = qnx4_readpage, |
439 | .writepage = qnx4_writepage, | |
440 | .sync_page = block_sync_page, | |
f8706184 NP |
441 | .write_begin = qnx4_write_begin, |
442 | .write_end = generic_write_end, | |
1da177e4 LT |
443 | .bmap = qnx4_bmap |
444 | }; | |
445 | ||
2b7e5bcb | 446 | struct inode *qnx4_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
447 | { |
448 | struct buffer_head *bh; | |
449 | struct qnx4_inode_entry *raw_inode; | |
2b7e5bcb DH |
450 | int block; |
451 | struct qnx4_inode_entry *qnx4_inode; | |
452 | struct inode *inode; | |
1da177e4 | 453 | |
2b7e5bcb DH |
454 | inode = iget_locked(sb, ino); |
455 | if (!inode) | |
456 | return ERR_PTR(-ENOMEM); | |
457 | if (!(inode->i_state & I_NEW)) | |
458 | return inode; | |
459 | ||
460 | qnx4_inode = qnx4_raw_inode(inode); | |
1da177e4 LT |
461 | inode->i_mode = 0; |
462 | ||
463 | QNX4DEBUG(("Reading inode : [%d]\n", ino)); | |
464 | if (!ino) { | |
2b7e5bcb DH |
465 | printk(KERN_ERR "qnx4: bad inode number on dev %s: %lu is " |
466 | "out of range\n", | |
1da177e4 | 467 | sb->s_id, ino); |
2b7e5bcb DH |
468 | iget_failed(inode); |
469 | return ERR_PTR(-EIO); | |
1da177e4 LT |
470 | } |
471 | block = ino / QNX4_INODES_PER_BLOCK; | |
472 | ||
473 | if (!(bh = sb_bread(sb, block))) { | |
474 | printk("qnx4: major problem: unable to read inode from dev " | |
475 | "%s\n", sb->s_id); | |
2b7e5bcb DH |
476 | iget_failed(inode); |
477 | return ERR_PTR(-EIO); | |
1da177e4 LT |
478 | } |
479 | raw_inode = ((struct qnx4_inode_entry *) bh->b_data) + | |
480 | (ino % QNX4_INODES_PER_BLOCK); | |
481 | ||
482 | inode->i_mode = le16_to_cpu(raw_inode->di_mode); | |
483 | inode->i_uid = (uid_t)le16_to_cpu(raw_inode->di_uid); | |
484 | inode->i_gid = (gid_t)le16_to_cpu(raw_inode->di_gid); | |
485 | inode->i_nlink = le16_to_cpu(raw_inode->di_nlink); | |
486 | inode->i_size = le32_to_cpu(raw_inode->di_size); | |
487 | inode->i_mtime.tv_sec = le32_to_cpu(raw_inode->di_mtime); | |
488 | inode->i_mtime.tv_nsec = 0; | |
489 | inode->i_atime.tv_sec = le32_to_cpu(raw_inode->di_atime); | |
490 | inode->i_atime.tv_nsec = 0; | |
491 | inode->i_ctime.tv_sec = le32_to_cpu(raw_inode->di_ctime); | |
492 | inode->i_ctime.tv_nsec = 0; | |
493 | inode->i_blocks = le32_to_cpu(raw_inode->di_first_xtnt.xtnt_size); | |
1da177e4 LT |
494 | |
495 | memcpy(qnx4_inode, raw_inode, QNX4_DIR_ENTRY_SIZE); | |
496 | if (S_ISREG(inode->i_mode)) { | |
497 | inode->i_op = &qnx4_file_inode_operations; | |
498 | inode->i_fop = &qnx4_file_operations; | |
499 | inode->i_mapping->a_ops = &qnx4_aops; | |
500 | qnx4_i(inode)->mmu_private = inode->i_size; | |
501 | } else if (S_ISDIR(inode->i_mode)) { | |
502 | inode->i_op = &qnx4_dir_inode_operations; | |
503 | inode->i_fop = &qnx4_dir_operations; | |
504 | } else if (S_ISLNK(inode->i_mode)) { | |
505 | inode->i_op = &page_symlink_inode_operations; | |
506 | inode->i_mapping->a_ops = &qnx4_aops; | |
507 | qnx4_i(inode)->mmu_private = inode->i_size; | |
2b7e5bcb DH |
508 | } else { |
509 | printk(KERN_ERR "qnx4: bad inode %lu on dev %s\n", | |
510 | ino, sb->s_id); | |
511 | iget_failed(inode); | |
512 | brelse(bh); | |
513 | return ERR_PTR(-EIO); | |
514 | } | |
1da177e4 | 515 | brelse(bh); |
2b7e5bcb DH |
516 | unlock_new_inode(inode); |
517 | return inode; | |
1da177e4 LT |
518 | } |
519 | ||
e18b890b | 520 | static struct kmem_cache *qnx4_inode_cachep; |
1da177e4 LT |
521 | |
522 | static struct inode *qnx4_alloc_inode(struct super_block *sb) | |
523 | { | |
524 | struct qnx4_inode_info *ei; | |
e94b1766 | 525 | ei = kmem_cache_alloc(qnx4_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
526 | if (!ei) |
527 | return NULL; | |
528 | return &ei->vfs_inode; | |
529 | } | |
530 | ||
531 | static void qnx4_destroy_inode(struct inode *inode) | |
532 | { | |
533 | kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode)); | |
534 | } | |
535 | ||
51cc5068 | 536 | static void init_once(void *foo) |
1da177e4 LT |
537 | { |
538 | struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo; | |
539 | ||
a35afb83 | 540 | inode_init_once(&ei->vfs_inode); |
1da177e4 LT |
541 | } |
542 | ||
543 | static int init_inodecache(void) | |
544 | { | |
545 | qnx4_inode_cachep = kmem_cache_create("qnx4_inode_cache", | |
546 | sizeof(struct qnx4_inode_info), | |
fffb60f9 PJ |
547 | 0, (SLAB_RECLAIM_ACCOUNT| |
548 | SLAB_MEM_SPREAD), | |
20c2df83 | 549 | init_once); |
1da177e4 LT |
550 | if (qnx4_inode_cachep == NULL) |
551 | return -ENOMEM; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | static void destroy_inodecache(void) | |
556 | { | |
1a1d92c1 | 557 | kmem_cache_destroy(qnx4_inode_cachep); |
1da177e4 LT |
558 | } |
559 | ||
454e2398 DH |
560 | static int qnx4_get_sb(struct file_system_type *fs_type, |
561 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 562 | { |
454e2398 DH |
563 | return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super, |
564 | mnt); | |
1da177e4 LT |
565 | } |
566 | ||
567 | static struct file_system_type qnx4_fs_type = { | |
568 | .owner = THIS_MODULE, | |
569 | .name = "qnx4", | |
570 | .get_sb = qnx4_get_sb, | |
571 | .kill_sb = kill_block_super, | |
572 | .fs_flags = FS_REQUIRES_DEV, | |
573 | }; | |
574 | ||
575 | static int __init init_qnx4_fs(void) | |
576 | { | |
577 | int err; | |
578 | ||
579 | err = init_inodecache(); | |
580 | if (err) | |
581 | return err; | |
582 | ||
583 | err = register_filesystem(&qnx4_fs_type); | |
584 | if (err) { | |
585 | destroy_inodecache(); | |
586 | return err; | |
587 | } | |
588 | ||
589 | printk("QNX4 filesystem 0.2.3 registered.\n"); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static void __exit exit_qnx4_fs(void) | |
594 | { | |
595 | unregister_filesystem(&qnx4_fs_type); | |
596 | destroy_inodecache(); | |
597 | } | |
598 | ||
599 | module_init(init_qnx4_fs) | |
600 | module_exit(exit_qnx4_fs) | |
601 | MODULE_LICENSE("GPL"); | |
602 |