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