1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * QNX6 file system, Linux implementation. |
4 | * |
5 | * Version : 1.0.0 |
6 | * |
7 | * History : |
8 | * |
9 | * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. |
10 | * 16-02-2012 pagemap extension by Al Viro |
11 | * |
12 | */ |
13 | |
14 | #include <linux/module.h> |
15 | #include <linux/init.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/highuid.h> |
18 | #include <linux/pagemap.h> |
19 | #include <linux/buffer_head.h> |
20 | #include <linux/writeback.h> |
21 | #include <linux/statfs.h> |
22 | #include <linux/parser.h> |
23 | #include <linux/seq_file.h> |
24 | #include <linux/mount.h> |
25 | #include <linux/crc32.h> |
26 | #include <linux/mpage.h> |
27 | #include "qnx6.h" |
28 | |
29 | static const struct super_operations qnx6_sops; |
30 | |
31 | static void qnx6_put_super(struct super_block *sb); |
32 | static struct inode *qnx6_alloc_inode(struct super_block *sb); |
33 | static void qnx6_free_inode(struct inode *inode); |
34 | static int qnx6_remount(struct super_block *sb, int *flags, char *data); |
35 | static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf); |
36 | static int qnx6_show_options(struct seq_file *seq, struct dentry *root); |
37 | |
38 | static const struct super_operations qnx6_sops = { |
39 | .alloc_inode = qnx6_alloc_inode, |
40 | .free_inode = qnx6_free_inode, |
41 | .put_super = qnx6_put_super, |
42 | .statfs = qnx6_statfs, |
43 | .remount_fs = qnx6_remount, |
44 | .show_options = qnx6_show_options, |
45 | }; |
46 | |
47 | static int qnx6_show_options(struct seq_file *seq, struct dentry *root) |
48 | { |
49 | struct super_block *sb = root->d_sb; |
50 | struct qnx6_sb_info *sbi = QNX6_SB(sb); |
51 | |
52 | if (sbi->s_mount_opt & QNX6_MOUNT_MMI_FS) |
53 | seq_puts(m: seq, s: ",mmi_fs" ); |
54 | return 0; |
55 | } |
56 | |
57 | static int qnx6_remount(struct super_block *sb, int *flags, char *data) |
58 | { |
59 | sync_filesystem(sb); |
60 | *flags |= SB_RDONLY; |
61 | return 0; |
62 | } |
63 | |
64 | static unsigned qnx6_get_devblock(struct super_block *sb, __fs32 block) |
65 | { |
66 | struct qnx6_sb_info *sbi = QNX6_SB(sb); |
67 | return fs32_to_cpu(sbi, n: block) + sbi->s_blks_off; |
68 | } |
69 | |
70 | static unsigned qnx6_block_map(struct inode *inode, unsigned iblock); |
71 | |
72 | static int qnx6_get_block(struct inode *inode, sector_t iblock, |
73 | struct buffer_head *bh, int create) |
74 | { |
75 | unsigned phys; |
76 | |
77 | pr_debug("qnx6_get_block inode=[%ld] iblock=[%ld]\n" , |
78 | inode->i_ino, (unsigned long)iblock); |
79 | |
80 | phys = qnx6_block_map(inode, iblock); |
81 | if (phys) { |
82 | /* logical block is before EOF */ |
83 | map_bh(bh, sb: inode->i_sb, block: phys); |
84 | } |
85 | return 0; |
86 | } |
87 | |
88 | static int qnx6_check_blockptr(__fs32 ptr) |
89 | { |
90 | if (ptr == ~(__fs32)0) { |
91 | pr_err("hit unused blockpointer.\n" ); |
92 | return 0; |
93 | } |
94 | return 1; |
95 | } |
96 | |
97 | static int qnx6_read_folio(struct file *file, struct folio *folio) |
98 | { |
99 | return mpage_read_folio(folio, get_block: qnx6_get_block); |
100 | } |
101 | |
102 | static void qnx6_readahead(struct readahead_control *rac) |
103 | { |
104 | mpage_readahead(rac, get_block: qnx6_get_block); |
105 | } |
106 | |
107 | /* |
108 | * returns the block number for the no-th element in the tree |
109 | * inodebits requred as there are multiple inodes in one inode block |
110 | */ |
111 | static unsigned qnx6_block_map(struct inode *inode, unsigned no) |
112 | { |
113 | struct super_block *s = inode->i_sb; |
114 | struct qnx6_sb_info *sbi = QNX6_SB(sb: s); |
115 | struct qnx6_inode_info *ei = QNX6_I(inode); |
116 | unsigned block = 0; |
117 | struct buffer_head *bh; |
118 | __fs32 ptr; |
119 | int levelptr; |
120 | int ptrbits = sbi->s_ptrbits; |
121 | int bitdelta; |
122 | u32 mask = (1 << ptrbits) - 1; |
123 | int depth = ei->di_filelevels; |
124 | int i; |
125 | |
126 | bitdelta = ptrbits * depth; |
127 | levelptr = no >> bitdelta; |
128 | |
129 | if (levelptr > QNX6_NO_DIRECT_POINTERS - 1) { |
130 | pr_err("Requested file block number (%u) too big." , no); |
131 | return 0; |
132 | } |
133 | |
134 | block = qnx6_get_devblock(sb: s, block: ei->di_block_ptr[levelptr]); |
135 | |
136 | for (i = 0; i < depth; i++) { |
137 | bh = sb_bread(sb: s, block); |
138 | if (!bh) { |
139 | pr_err("Error reading block (%u)\n" , block); |
140 | return 0; |
141 | } |
142 | bitdelta -= ptrbits; |
143 | levelptr = (no >> bitdelta) & mask; |
144 | ptr = ((__fs32 *)bh->b_data)[levelptr]; |
145 | |
146 | if (!qnx6_check_blockptr(ptr)) |
147 | return 0; |
148 | |
149 | block = qnx6_get_devblock(sb: s, block: ptr); |
150 | brelse(bh); |
151 | } |
152 | return block; |
153 | } |
154 | |
155 | static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf) |
156 | { |
157 | struct super_block *sb = dentry->d_sb; |
158 | struct qnx6_sb_info *sbi = QNX6_SB(sb); |
159 | u64 id = huge_encode_dev(dev: sb->s_bdev->bd_dev); |
160 | |
161 | buf->f_type = sb->s_magic; |
162 | buf->f_bsize = sb->s_blocksize; |
163 | buf->f_blocks = fs32_to_cpu(sbi, n: sbi->sb->sb_num_blocks); |
164 | buf->f_bfree = fs32_to_cpu(sbi, n: sbi->sb->sb_free_blocks); |
165 | buf->f_files = fs32_to_cpu(sbi, n: sbi->sb->sb_num_inodes); |
166 | buf->f_ffree = fs32_to_cpu(sbi, n: sbi->sb->sb_free_inodes); |
167 | buf->f_bavail = buf->f_bfree; |
168 | buf->f_namelen = QNX6_LONG_NAME_MAX; |
169 | buf->f_fsid = u64_to_fsid(v: id); |
170 | |
171 | return 0; |
172 | } |
173 | |
174 | /* |
175 | * Check the root directory of the filesystem to make sure |
176 | * it really _is_ a qnx6 filesystem, and to check the size |
177 | * of the directory entry. |
178 | */ |
179 | static const char *qnx6_checkroot(struct super_block *s) |
180 | { |
181 | static char match_root[2][3] = {".\0\0" , "..\0" }; |
182 | int i, error = 0; |
183 | struct qnx6_dir_entry *dir_entry; |
184 | struct inode *root = d_inode(dentry: s->s_root); |
185 | struct address_space *mapping = root->i_mapping; |
186 | struct page *page = read_mapping_page(mapping, index: 0, NULL); |
187 | if (IS_ERR(ptr: page)) |
188 | return "error reading root directory" ; |
189 | kmap(page); |
190 | dir_entry = page_address(page); |
191 | for (i = 0; i < 2; i++) { |
192 | /* maximum 3 bytes - due to match_root limitation */ |
193 | if (strncmp(dir_entry[i].de_fname, match_root[i], 3)) |
194 | error = 1; |
195 | } |
196 | qnx6_put_page(page); |
197 | if (error) |
198 | return "error reading root directory." ; |
199 | return NULL; |
200 | } |
201 | |
202 | #ifdef CONFIG_QNX6FS_DEBUG |
203 | void qnx6_superblock_debug(struct qnx6_super_block *sb, struct super_block *s) |
204 | { |
205 | struct qnx6_sb_info *sbi = QNX6_SB(sb: s); |
206 | |
207 | pr_debug("magic: %08x\n" , fs32_to_cpu(sbi, sb->sb_magic)); |
208 | pr_debug("checksum: %08x\n" , fs32_to_cpu(sbi, sb->sb_checksum)); |
209 | pr_debug("serial: %llx\n" , fs64_to_cpu(sbi, sb->sb_serial)); |
210 | pr_debug("flags: %08x\n" , fs32_to_cpu(sbi, sb->sb_flags)); |
211 | pr_debug("blocksize: %08x\n" , fs32_to_cpu(sbi, sb->sb_blocksize)); |
212 | pr_debug("num_inodes: %08x\n" , fs32_to_cpu(sbi, sb->sb_num_inodes)); |
213 | pr_debug("free_inodes: %08x\n" , fs32_to_cpu(sbi, sb->sb_free_inodes)); |
214 | pr_debug("num_blocks: %08x\n" , fs32_to_cpu(sbi, sb->sb_num_blocks)); |
215 | pr_debug("free_blocks: %08x\n" , fs32_to_cpu(sbi, sb->sb_free_blocks)); |
216 | pr_debug("inode_levels: %02x\n" , sb->Inode.levels); |
217 | } |
218 | #endif |
219 | |
220 | enum { |
221 | Opt_mmifs, |
222 | Opt_err |
223 | }; |
224 | |
225 | static const match_table_t tokens = { |
226 | {Opt_mmifs, "mmi_fs" }, |
227 | {Opt_err, NULL} |
228 | }; |
229 | |
230 | static int qnx6_parse_options(char *options, struct super_block *sb) |
231 | { |
232 | char *p; |
233 | struct qnx6_sb_info *sbi = QNX6_SB(sb); |
234 | substring_t args[MAX_OPT_ARGS]; |
235 | |
236 | if (!options) |
237 | return 1; |
238 | |
239 | while ((p = strsep(&options, "," )) != NULL) { |
240 | int token; |
241 | if (!*p) |
242 | continue; |
243 | |
244 | token = match_token(p, table: tokens, args); |
245 | switch (token) { |
246 | case Opt_mmifs: |
247 | set_opt(sbi->s_mount_opt, MMI_FS); |
248 | break; |
249 | default: |
250 | return 0; |
251 | } |
252 | } |
253 | return 1; |
254 | } |
255 | |
256 | static struct buffer_head *qnx6_check_first_superblock(struct super_block *s, |
257 | int offset, int silent) |
258 | { |
259 | struct qnx6_sb_info *sbi = QNX6_SB(sb: s); |
260 | struct buffer_head *bh; |
261 | struct qnx6_super_block *sb; |
262 | |
263 | /* Check the superblock signatures |
264 | start with the first superblock */ |
265 | bh = sb_bread(sb: s, block: offset); |
266 | if (!bh) { |
267 | pr_err("unable to read the first superblock\n" ); |
268 | return NULL; |
269 | } |
270 | sb = (struct qnx6_super_block *)bh->b_data; |
271 | if (fs32_to_cpu(sbi, n: sb->sb_magic) != QNX6_SUPER_MAGIC) { |
272 | sbi->s_bytesex = BYTESEX_BE; |
273 | if (fs32_to_cpu(sbi, n: sb->sb_magic) == QNX6_SUPER_MAGIC) { |
274 | /* we got a big endian fs */ |
275 | pr_debug("fs got different endianness.\n" ); |
276 | return bh; |
277 | } else |
278 | sbi->s_bytesex = BYTESEX_LE; |
279 | if (!silent) { |
280 | if (offset == 0) { |
281 | pr_err("wrong signature (magic) in superblock #1.\n" ); |
282 | } else { |
283 | pr_info("wrong signature (magic) at position (0x%lx) - will try alternative position (0x0000).\n" , |
284 | offset * s->s_blocksize); |
285 | } |
286 | } |
287 | brelse(bh); |
288 | return NULL; |
289 | } |
290 | return bh; |
291 | } |
292 | |
293 | static struct inode *qnx6_private_inode(struct super_block *s, |
294 | struct qnx6_root_node *p); |
295 | |
296 | static int qnx6_fill_super(struct super_block *s, void *data, int silent) |
297 | { |
298 | struct buffer_head *bh1 = NULL, *bh2 = NULL; |
299 | struct qnx6_super_block *sb1 = NULL, *sb2 = NULL; |
300 | struct qnx6_sb_info *sbi; |
301 | struct inode *root; |
302 | const char *errmsg; |
303 | struct qnx6_sb_info *qs; |
304 | int ret = -EINVAL; |
305 | u64 offset; |
306 | int bootblock_offset = QNX6_BOOTBLOCK_SIZE; |
307 | |
308 | qs = kzalloc(size: sizeof(struct qnx6_sb_info), GFP_KERNEL); |
309 | if (!qs) |
310 | return -ENOMEM; |
311 | s->s_fs_info = qs; |
312 | |
313 | /* Superblock always is 512 Byte long */ |
314 | if (!sb_set_blocksize(s, QNX6_SUPERBLOCK_SIZE)) { |
315 | pr_err("unable to set blocksize\n" ); |
316 | goto outnobh; |
317 | } |
318 | |
319 | /* parse the mount-options */ |
320 | if (!qnx6_parse_options(options: (char *) data, sb: s)) { |
321 | pr_err("invalid mount options.\n" ); |
322 | goto outnobh; |
323 | } |
324 | if (test_opt(s, MMI_FS)) { |
325 | sb1 = qnx6_mmi_fill_super(s, silent); |
326 | if (sb1) |
327 | goto mmi_success; |
328 | else |
329 | goto outnobh; |
330 | } |
331 | sbi = QNX6_SB(sb: s); |
332 | sbi->s_bytesex = BYTESEX_LE; |
333 | /* Check the superblock signatures |
334 | start with the first superblock */ |
335 | bh1 = qnx6_check_first_superblock(s, |
336 | offset: bootblock_offset / QNX6_SUPERBLOCK_SIZE, silent); |
337 | if (!bh1) { |
338 | /* try again without bootblock offset */ |
339 | bh1 = qnx6_check_first_superblock(s, offset: 0, silent); |
340 | if (!bh1) { |
341 | pr_err("unable to read the first superblock\n" ); |
342 | goto outnobh; |
343 | } |
344 | /* seems that no bootblock at partition start */ |
345 | bootblock_offset = 0; |
346 | } |
347 | sb1 = (struct qnx6_super_block *)bh1->b_data; |
348 | |
349 | #ifdef CONFIG_QNX6FS_DEBUG |
350 | qnx6_superblock_debug(sb: sb1, s); |
351 | #endif |
352 | |
353 | /* checksum check - start at byte 8 and end at byte 512 */ |
354 | if (fs32_to_cpu(sbi, n: sb1->sb_checksum) != |
355 | crc32_be(crc: 0, p: (char *)(bh1->b_data + 8), len: 504)) { |
356 | pr_err("superblock #1 checksum error\n" ); |
357 | goto out; |
358 | } |
359 | |
360 | /* set new blocksize */ |
361 | if (!sb_set_blocksize(s, fs32_to_cpu(sbi, n: sb1->sb_blocksize))) { |
362 | pr_err("unable to set blocksize\n" ); |
363 | goto out; |
364 | } |
365 | /* blocksize invalidates bh - pull it back in */ |
366 | brelse(bh: bh1); |
367 | bh1 = sb_bread(sb: s, block: bootblock_offset >> s->s_blocksize_bits); |
368 | if (!bh1) |
369 | goto outnobh; |
370 | sb1 = (struct qnx6_super_block *)bh1->b_data; |
371 | |
372 | /* calculate second superblock blocknumber */ |
373 | offset = fs32_to_cpu(sbi, n: sb1->sb_num_blocks) + |
374 | (bootblock_offset >> s->s_blocksize_bits) + |
375 | (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); |
376 | |
377 | /* set bootblock offset */ |
378 | sbi->s_blks_off = (bootblock_offset >> s->s_blocksize_bits) + |
379 | (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); |
380 | |
381 | /* next the second superblock */ |
382 | bh2 = sb_bread(sb: s, block: offset); |
383 | if (!bh2) { |
384 | pr_err("unable to read the second superblock\n" ); |
385 | goto out; |
386 | } |
387 | sb2 = (struct qnx6_super_block *)bh2->b_data; |
388 | if (fs32_to_cpu(sbi, n: sb2->sb_magic) != QNX6_SUPER_MAGIC) { |
389 | if (!silent) |
390 | pr_err("wrong signature (magic) in superblock #2.\n" ); |
391 | goto out; |
392 | } |
393 | |
394 | /* checksum check - start at byte 8 and end at byte 512 */ |
395 | if (fs32_to_cpu(sbi, n: sb2->sb_checksum) != |
396 | crc32_be(crc: 0, p: (char *)(bh2->b_data + 8), len: 504)) { |
397 | pr_err("superblock #2 checksum error\n" ); |
398 | goto out; |
399 | } |
400 | |
401 | if (fs64_to_cpu(sbi, n: sb1->sb_serial) >= |
402 | fs64_to_cpu(sbi, n: sb2->sb_serial)) { |
403 | /* superblock #1 active */ |
404 | sbi->sb_buf = bh1; |
405 | sbi->sb = (struct qnx6_super_block *)bh1->b_data; |
406 | brelse(bh: bh2); |
407 | pr_info("superblock #1 active\n" ); |
408 | } else { |
409 | /* superblock #2 active */ |
410 | sbi->sb_buf = bh2; |
411 | sbi->sb = (struct qnx6_super_block *)bh2->b_data; |
412 | brelse(bh: bh1); |
413 | pr_info("superblock #2 active\n" ); |
414 | } |
415 | mmi_success: |
416 | /* sanity check - limit maximum indirect pointer levels */ |
417 | if (sb1->Inode.levels > QNX6_PTR_MAX_LEVELS) { |
418 | pr_err("too many inode levels (max %i, sb %i)\n" , |
419 | QNX6_PTR_MAX_LEVELS, sb1->Inode.levels); |
420 | goto out; |
421 | } |
422 | if (sb1->Longfile.levels > QNX6_PTR_MAX_LEVELS) { |
423 | pr_err("too many longfilename levels (max %i, sb %i)\n" , |
424 | QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels); |
425 | goto out; |
426 | } |
427 | s->s_op = &qnx6_sops; |
428 | s->s_magic = QNX6_SUPER_MAGIC; |
429 | s->s_flags |= SB_RDONLY; /* Yup, read-only yet */ |
430 | s->s_time_min = 0; |
431 | s->s_time_max = U32_MAX; |
432 | |
433 | /* ease the later tree level calculations */ |
434 | sbi = QNX6_SB(sb: s); |
435 | sbi->s_ptrbits = ilog2(s->s_blocksize / 4); |
436 | sbi->inodes = qnx6_private_inode(s, p: &sb1->Inode); |
437 | if (!sbi->inodes) |
438 | goto out; |
439 | sbi->longfile = qnx6_private_inode(s, p: &sb1->Longfile); |
440 | if (!sbi->longfile) |
441 | goto out1; |
442 | |
443 | /* prefetch root inode */ |
444 | root = qnx6_iget(sb: s, QNX6_ROOT_INO); |
445 | if (IS_ERR(ptr: root)) { |
446 | pr_err("get inode failed\n" ); |
447 | ret = PTR_ERR(ptr: root); |
448 | goto out2; |
449 | } |
450 | |
451 | ret = -ENOMEM; |
452 | s->s_root = d_make_root(root); |
453 | if (!s->s_root) |
454 | goto out2; |
455 | |
456 | ret = -EINVAL; |
457 | errmsg = qnx6_checkroot(s); |
458 | if (errmsg != NULL) { |
459 | if (!silent) |
460 | pr_err("%s\n" , errmsg); |
461 | goto out3; |
462 | } |
463 | return 0; |
464 | |
465 | out3: |
466 | dput(s->s_root); |
467 | s->s_root = NULL; |
468 | out2: |
469 | iput(sbi->longfile); |
470 | out1: |
471 | iput(sbi->inodes); |
472 | out: |
473 | brelse(bh: bh1); |
474 | brelse(bh: bh2); |
475 | outnobh: |
476 | kfree(objp: qs); |
477 | s->s_fs_info = NULL; |
478 | return ret; |
479 | } |
480 | |
481 | static void qnx6_put_super(struct super_block *sb) |
482 | { |
483 | struct qnx6_sb_info *qs = QNX6_SB(sb); |
484 | brelse(bh: qs->sb_buf); |
485 | iput(qs->longfile); |
486 | iput(qs->inodes); |
487 | kfree(objp: qs); |
488 | sb->s_fs_info = NULL; |
489 | return; |
490 | } |
491 | |
492 | static sector_t qnx6_bmap(struct address_space *mapping, sector_t block) |
493 | { |
494 | return generic_block_bmap(mapping, block, qnx6_get_block); |
495 | } |
496 | static const struct address_space_operations qnx6_aops = { |
497 | .read_folio = qnx6_read_folio, |
498 | .readahead = qnx6_readahead, |
499 | .bmap = qnx6_bmap |
500 | }; |
501 | |
502 | static struct inode *qnx6_private_inode(struct super_block *s, |
503 | struct qnx6_root_node *p) |
504 | { |
505 | struct inode *inode = new_inode(sb: s); |
506 | if (inode) { |
507 | struct qnx6_inode_info *ei = QNX6_I(inode); |
508 | struct qnx6_sb_info *sbi = QNX6_SB(sb: s); |
509 | inode->i_size = fs64_to_cpu(sbi, n: p->size); |
510 | memcpy(ei->di_block_ptr, p->ptr, sizeof(p->ptr)); |
511 | ei->di_filelevels = p->levels; |
512 | inode->i_mode = S_IFREG | S_IRUSR; /* probably wrong */ |
513 | inode->i_mapping->a_ops = &qnx6_aops; |
514 | } |
515 | return inode; |
516 | } |
517 | |
518 | struct inode *qnx6_iget(struct super_block *sb, unsigned ino) |
519 | { |
520 | struct qnx6_sb_info *sbi = QNX6_SB(sb); |
521 | struct qnx6_inode_entry *raw_inode; |
522 | struct inode *inode; |
523 | struct qnx6_inode_info *ei; |
524 | struct address_space *mapping; |
525 | struct page *page; |
526 | u32 n, offs; |
527 | |
528 | inode = iget_locked(sb, ino); |
529 | if (!inode) |
530 | return ERR_PTR(error: -ENOMEM); |
531 | if (!(inode->i_state & I_NEW)) |
532 | return inode; |
533 | |
534 | ei = QNX6_I(inode); |
535 | |
536 | inode->i_mode = 0; |
537 | |
538 | if (ino == 0) { |
539 | pr_err("bad inode number on dev %s: %u is out of range\n" , |
540 | sb->s_id, ino); |
541 | iget_failed(inode); |
542 | return ERR_PTR(error: -EIO); |
543 | } |
544 | n = (ino - 1) >> (PAGE_SHIFT - QNX6_INODE_SIZE_BITS); |
545 | offs = (ino - 1) & (~PAGE_MASK >> QNX6_INODE_SIZE_BITS); |
546 | mapping = sbi->inodes->i_mapping; |
547 | page = read_mapping_page(mapping, index: n, NULL); |
548 | if (IS_ERR(ptr: page)) { |
549 | pr_err("major problem: unable to read inode from dev %s\n" , |
550 | sb->s_id); |
551 | iget_failed(inode); |
552 | return ERR_CAST(ptr: page); |
553 | } |
554 | kmap(page); |
555 | raw_inode = ((struct qnx6_inode_entry *)page_address(page)) + offs; |
556 | |
557 | inode->i_mode = fs16_to_cpu(sbi, n: raw_inode->di_mode); |
558 | i_uid_write(inode, uid: (uid_t)fs32_to_cpu(sbi, n: raw_inode->di_uid)); |
559 | i_gid_write(inode, gid: (gid_t)fs32_to_cpu(sbi, n: raw_inode->di_gid)); |
560 | inode->i_size = fs64_to_cpu(sbi, n: raw_inode->di_size); |
561 | inode_set_mtime(inode, sec: fs32_to_cpu(sbi, n: raw_inode->di_mtime), nsec: 0); |
562 | inode_set_atime(inode, sec: fs32_to_cpu(sbi, n: raw_inode->di_atime), nsec: 0); |
563 | inode_set_ctime(inode, sec: fs32_to_cpu(sbi, n: raw_inode->di_ctime), nsec: 0); |
564 | |
565 | /* calc blocks based on 512 byte blocksize */ |
566 | inode->i_blocks = (inode->i_size + 511) >> 9; |
567 | |
568 | memcpy(&ei->di_block_ptr, &raw_inode->di_block_ptr, |
569 | sizeof(raw_inode->di_block_ptr)); |
570 | ei->di_filelevels = raw_inode->di_filelevels; |
571 | |
572 | if (S_ISREG(inode->i_mode)) { |
573 | inode->i_fop = &generic_ro_fops; |
574 | inode->i_mapping->a_ops = &qnx6_aops; |
575 | } else if (S_ISDIR(inode->i_mode)) { |
576 | inode->i_op = &qnx6_dir_inode_operations; |
577 | inode->i_fop = &qnx6_dir_operations; |
578 | inode->i_mapping->a_ops = &qnx6_aops; |
579 | } else if (S_ISLNK(inode->i_mode)) { |
580 | inode->i_op = &page_symlink_inode_operations; |
581 | inode_nohighmem(inode); |
582 | inode->i_mapping->a_ops = &qnx6_aops; |
583 | } else |
584 | init_special_inode(inode, inode->i_mode, 0); |
585 | qnx6_put_page(page); |
586 | unlock_new_inode(inode); |
587 | return inode; |
588 | } |
589 | |
590 | static struct kmem_cache *qnx6_inode_cachep; |
591 | |
592 | static struct inode *qnx6_alloc_inode(struct super_block *sb) |
593 | { |
594 | struct qnx6_inode_info *ei; |
595 | ei = alloc_inode_sb(sb, cache: qnx6_inode_cachep, GFP_KERNEL); |
596 | if (!ei) |
597 | return NULL; |
598 | return &ei->vfs_inode; |
599 | } |
600 | |
601 | static void qnx6_free_inode(struct inode *inode) |
602 | { |
603 | kmem_cache_free(s: qnx6_inode_cachep, objp: QNX6_I(inode)); |
604 | } |
605 | |
606 | static void init_once(void *foo) |
607 | { |
608 | struct qnx6_inode_info *ei = (struct qnx6_inode_info *) foo; |
609 | |
610 | inode_init_once(&ei->vfs_inode); |
611 | } |
612 | |
613 | static int init_inodecache(void) |
614 | { |
615 | qnx6_inode_cachep = kmem_cache_create(name: "qnx6_inode_cache" , |
616 | size: sizeof(struct qnx6_inode_info), |
617 | align: 0, flags: (SLAB_RECLAIM_ACCOUNT| |
618 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
619 | ctor: init_once); |
620 | if (!qnx6_inode_cachep) |
621 | return -ENOMEM; |
622 | return 0; |
623 | } |
624 | |
625 | static void destroy_inodecache(void) |
626 | { |
627 | /* |
628 | * Make sure all delayed rcu free inodes are flushed before we |
629 | * destroy cache. |
630 | */ |
631 | rcu_barrier(); |
632 | kmem_cache_destroy(s: qnx6_inode_cachep); |
633 | } |
634 | |
635 | static struct dentry *qnx6_mount(struct file_system_type *fs_type, |
636 | int flags, const char *dev_name, void *data) |
637 | { |
638 | return mount_bdev(fs_type, flags, dev_name, data, fill_super: qnx6_fill_super); |
639 | } |
640 | |
641 | static struct file_system_type qnx6_fs_type = { |
642 | .owner = THIS_MODULE, |
643 | .name = "qnx6" , |
644 | .mount = qnx6_mount, |
645 | .kill_sb = kill_block_super, |
646 | .fs_flags = FS_REQUIRES_DEV, |
647 | }; |
648 | MODULE_ALIAS_FS("qnx6" ); |
649 | |
650 | static int __init init_qnx6_fs(void) |
651 | { |
652 | int err; |
653 | |
654 | err = init_inodecache(); |
655 | if (err) |
656 | return err; |
657 | |
658 | err = register_filesystem(&qnx6_fs_type); |
659 | if (err) { |
660 | destroy_inodecache(); |
661 | return err; |
662 | } |
663 | |
664 | pr_info("QNX6 filesystem 1.0.0 registered.\n" ); |
665 | return 0; |
666 | } |
667 | |
668 | static void __exit exit_qnx6_fs(void) |
669 | { |
670 | unregister_filesystem(&qnx6_fs_type); |
671 | destroy_inodecache(); |
672 | } |
673 | |
674 | module_init(init_qnx6_fs) |
675 | module_exit(exit_qnx6_fs) |
676 | MODULE_LICENSE("GPL" ); |
677 | |