Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/minix/inode.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | * | |
6 | * Copyright (C) 1996 Gertjan van Wingerde (gertjan@cs.vu.nl) | |
7 | * Minix V2 fs support. | |
8 | * | |
9 | * Modified for 680x0 by Andreas Schwab | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include "minix.h" | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/highuid.h> | |
18 | #include <linux/vfs.h> | |
19 | ||
20 | static void minix_read_inode(struct inode * inode); | |
21 | static int minix_write_inode(struct inode * inode, int wait); | |
22 | static int minix_statfs(struct super_block *sb, struct kstatfs *buf); | |
23 | static int minix_remount (struct super_block * sb, int * flags, char * data); | |
24 | ||
25 | static void minix_delete_inode(struct inode *inode) | |
26 | { | |
fef26658 | 27 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
28 | inode->i_size = 0; |
29 | minix_truncate(inode); | |
30 | minix_free_inode(inode); | |
31 | } | |
32 | ||
33 | static void minix_put_super(struct super_block *sb) | |
34 | { | |
35 | int i; | |
36 | struct minix_sb_info *sbi = minix_sb(sb); | |
37 | ||
38 | if (!(sb->s_flags & MS_RDONLY)) { | |
39 | sbi->s_ms->s_state = sbi->s_mount_state; | |
40 | mark_buffer_dirty(sbi->s_sbh); | |
41 | } | |
42 | for (i = 0; i < sbi->s_imap_blocks; i++) | |
43 | brelse(sbi->s_imap[i]); | |
44 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
45 | brelse(sbi->s_zmap[i]); | |
46 | brelse (sbi->s_sbh); | |
47 | kfree(sbi->s_imap); | |
48 | sb->s_fs_info = NULL; | |
49 | kfree(sbi); | |
50 | ||
51 | return; | |
52 | } | |
53 | ||
54 | static kmem_cache_t * minix_inode_cachep; | |
55 | ||
56 | static struct inode *minix_alloc_inode(struct super_block *sb) | |
57 | { | |
58 | struct minix_inode_info *ei; | |
59 | ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, SLAB_KERNEL); | |
60 | if (!ei) | |
61 | return NULL; | |
62 | return &ei->vfs_inode; | |
63 | } | |
64 | ||
65 | static void minix_destroy_inode(struct inode *inode) | |
66 | { | |
67 | kmem_cache_free(minix_inode_cachep, minix_i(inode)); | |
68 | } | |
69 | ||
70 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
71 | { | |
72 | struct minix_inode_info *ei = (struct minix_inode_info *) foo; | |
73 | ||
74 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
75 | SLAB_CTOR_CONSTRUCTOR) | |
76 | inode_init_once(&ei->vfs_inode); | |
77 | } | |
78 | ||
79 | static int init_inodecache(void) | |
80 | { | |
81 | minix_inode_cachep = kmem_cache_create("minix_inode_cache", | |
82 | sizeof(struct minix_inode_info), | |
4b6a9316 | 83 | 0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
1da177e4 LT |
84 | init_once, NULL); |
85 | if (minix_inode_cachep == NULL) | |
86 | return -ENOMEM; | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static void destroy_inodecache(void) | |
91 | { | |
92 | if (kmem_cache_destroy(minix_inode_cachep)) | |
93 | printk(KERN_INFO "minix_inode_cache: not all structures were freed\n"); | |
94 | } | |
95 | ||
96 | static struct super_operations minix_sops = { | |
97 | .alloc_inode = minix_alloc_inode, | |
98 | .destroy_inode = minix_destroy_inode, | |
99 | .read_inode = minix_read_inode, | |
100 | .write_inode = minix_write_inode, | |
101 | .delete_inode = minix_delete_inode, | |
102 | .put_super = minix_put_super, | |
103 | .statfs = minix_statfs, | |
104 | .remount_fs = minix_remount, | |
105 | }; | |
106 | ||
107 | static int minix_remount (struct super_block * sb, int * flags, char * data) | |
108 | { | |
109 | struct minix_sb_info * sbi = minix_sb(sb); | |
110 | struct minix_super_block * ms; | |
111 | ||
112 | ms = sbi->s_ms; | |
113 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
114 | return 0; | |
115 | if (*flags & MS_RDONLY) { | |
116 | if (ms->s_state & MINIX_VALID_FS || | |
117 | !(sbi->s_mount_state & MINIX_VALID_FS)) | |
118 | return 0; | |
119 | /* Mounting a rw partition read-only. */ | |
120 | ms->s_state = sbi->s_mount_state; | |
121 | mark_buffer_dirty(sbi->s_sbh); | |
122 | } else { | |
123 | /* Mount a partition which is read-only, read-write. */ | |
124 | sbi->s_mount_state = ms->s_state; | |
125 | ms->s_state &= ~MINIX_VALID_FS; | |
126 | mark_buffer_dirty(sbi->s_sbh); | |
127 | ||
128 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
129 | printk ("MINIX-fs warning: remounting unchecked fs, " | |
130 | "running fsck is recommended.\n"); | |
131 | else if ((sbi->s_mount_state & MINIX_ERROR_FS)) | |
132 | printk ("MINIX-fs warning: remounting fs with errors, " | |
133 | "running fsck is recommended.\n"); | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int minix_fill_super(struct super_block *s, void *data, int silent) | |
139 | { | |
140 | struct buffer_head *bh; | |
141 | struct buffer_head **map; | |
142 | struct minix_super_block *ms; | |
143 | int i, block; | |
144 | struct inode *root_inode; | |
145 | struct minix_sb_info *sbi; | |
146 | ||
147 | sbi = kmalloc(sizeof(struct minix_sb_info), GFP_KERNEL); | |
148 | if (!sbi) | |
149 | return -ENOMEM; | |
150 | s->s_fs_info = sbi; | |
151 | memset(sbi, 0, sizeof(struct minix_sb_info)); | |
152 | ||
153 | /* N.B. These should be compile-time tests. | |
154 | Unfortunately that is impossible. */ | |
155 | if (32 != sizeof (struct minix_inode)) | |
156 | panic("bad V1 i-node size"); | |
157 | if (64 != sizeof(struct minix2_inode)) | |
158 | panic("bad V2 i-node size"); | |
159 | ||
160 | if (!sb_set_blocksize(s, BLOCK_SIZE)) | |
161 | goto out_bad_hblock; | |
162 | ||
163 | if (!(bh = sb_bread(s, 1))) | |
164 | goto out_bad_sb; | |
165 | ||
166 | ms = (struct minix_super_block *) bh->b_data; | |
167 | sbi->s_ms = ms; | |
168 | sbi->s_sbh = bh; | |
169 | sbi->s_mount_state = ms->s_state; | |
170 | sbi->s_ninodes = ms->s_ninodes; | |
171 | sbi->s_nzones = ms->s_nzones; | |
172 | sbi->s_imap_blocks = ms->s_imap_blocks; | |
173 | sbi->s_zmap_blocks = ms->s_zmap_blocks; | |
174 | sbi->s_firstdatazone = ms->s_firstdatazone; | |
175 | sbi->s_log_zone_size = ms->s_log_zone_size; | |
176 | sbi->s_max_size = ms->s_max_size; | |
177 | s->s_magic = ms->s_magic; | |
178 | if (s->s_magic == MINIX_SUPER_MAGIC) { | |
179 | sbi->s_version = MINIX_V1; | |
180 | sbi->s_dirsize = 16; | |
181 | sbi->s_namelen = 14; | |
182 | sbi->s_link_max = MINIX_LINK_MAX; | |
183 | } else if (s->s_magic == MINIX_SUPER_MAGIC2) { | |
184 | sbi->s_version = MINIX_V1; | |
185 | sbi->s_dirsize = 32; | |
186 | sbi->s_namelen = 30; | |
187 | sbi->s_link_max = MINIX_LINK_MAX; | |
188 | } else if (s->s_magic == MINIX2_SUPER_MAGIC) { | |
189 | sbi->s_version = MINIX_V2; | |
190 | sbi->s_nzones = ms->s_zones; | |
191 | sbi->s_dirsize = 16; | |
192 | sbi->s_namelen = 14; | |
193 | sbi->s_link_max = MINIX2_LINK_MAX; | |
194 | } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { | |
195 | sbi->s_version = MINIX_V2; | |
196 | sbi->s_nzones = ms->s_zones; | |
197 | sbi->s_dirsize = 32; | |
198 | sbi->s_namelen = 30; | |
199 | sbi->s_link_max = MINIX2_LINK_MAX; | |
200 | } else | |
201 | goto out_no_fs; | |
202 | ||
203 | /* | |
204 | * Allocate the buffer map to keep the superblock small. | |
205 | */ | |
206 | i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); | |
207 | map = kmalloc(i, GFP_KERNEL); | |
208 | if (!map) | |
209 | goto out_no_map; | |
210 | memset(map, 0, i); | |
211 | sbi->s_imap = &map[0]; | |
212 | sbi->s_zmap = &map[sbi->s_imap_blocks]; | |
213 | ||
214 | block=2; | |
215 | for (i=0 ; i < sbi->s_imap_blocks ; i++) { | |
216 | if (!(sbi->s_imap[i]=sb_bread(s, block))) | |
217 | goto out_no_bitmap; | |
218 | block++; | |
219 | } | |
220 | for (i=0 ; i < sbi->s_zmap_blocks ; i++) { | |
221 | if (!(sbi->s_zmap[i]=sb_bread(s, block))) | |
222 | goto out_no_bitmap; | |
223 | block++; | |
224 | } | |
225 | ||
226 | minix_set_bit(0,sbi->s_imap[0]->b_data); | |
227 | minix_set_bit(0,sbi->s_zmap[0]->b_data); | |
228 | ||
229 | /* set up enough so that it can read an inode */ | |
230 | s->s_op = &minix_sops; | |
231 | root_inode = iget(s, MINIX_ROOT_INO); | |
232 | if (!root_inode || is_bad_inode(root_inode)) | |
233 | goto out_no_root; | |
234 | ||
235 | s->s_root = d_alloc_root(root_inode); | |
236 | if (!s->s_root) | |
237 | goto out_iput; | |
238 | ||
239 | if (!NO_TRUNCATE) | |
240 | s->s_root->d_op = &minix_dentry_operations; | |
241 | ||
242 | if (!(s->s_flags & MS_RDONLY)) { | |
243 | ms->s_state &= ~MINIX_VALID_FS; | |
244 | mark_buffer_dirty(bh); | |
245 | } | |
246 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
247 | printk ("MINIX-fs: mounting unchecked file system, " | |
248 | "running fsck is recommended.\n"); | |
249 | else if (sbi->s_mount_state & MINIX_ERROR_FS) | |
250 | printk ("MINIX-fs: mounting file system with errors, " | |
251 | "running fsck is recommended.\n"); | |
252 | return 0; | |
253 | ||
254 | out_iput: | |
255 | iput(root_inode); | |
256 | goto out_freemap; | |
257 | ||
258 | out_no_root: | |
259 | if (!silent) | |
260 | printk("MINIX-fs: get root inode failed\n"); | |
261 | goto out_freemap; | |
262 | ||
263 | out_no_bitmap: | |
264 | printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); | |
265 | out_freemap: | |
266 | for (i = 0; i < sbi->s_imap_blocks; i++) | |
267 | brelse(sbi->s_imap[i]); | |
268 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
269 | brelse(sbi->s_zmap[i]); | |
270 | kfree(sbi->s_imap); | |
271 | goto out_release; | |
272 | ||
273 | out_no_map: | |
274 | if (!silent) | |
275 | printk ("MINIX-fs: can't allocate map\n"); | |
276 | goto out_release; | |
277 | ||
278 | out_no_fs: | |
279 | if (!silent) | |
280 | printk("VFS: Can't find a Minix or Minix V2 filesystem on device " | |
281 | "%s.\n", s->s_id); | |
282 | out_release: | |
283 | brelse(bh); | |
284 | goto out; | |
285 | ||
286 | out_bad_hblock: | |
287 | printk("MINIX-fs: blocksize too small for device.\n"); | |
288 | goto out; | |
289 | ||
290 | out_bad_sb: | |
291 | printk("MINIX-fs: unable to read superblock\n"); | |
292 | out: | |
293 | s->s_fs_info = NULL; | |
294 | kfree(sbi); | |
295 | return -EINVAL; | |
296 | } | |
297 | ||
298 | static int minix_statfs(struct super_block *sb, struct kstatfs *buf) | |
299 | { | |
300 | struct minix_sb_info *sbi = minix_sb(sb); | |
301 | buf->f_type = sb->s_magic; | |
302 | buf->f_bsize = sb->s_blocksize; | |
303 | buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; | |
304 | buf->f_bfree = minix_count_free_blocks(sbi); | |
305 | buf->f_bavail = buf->f_bfree; | |
306 | buf->f_files = sbi->s_ninodes; | |
307 | buf->f_ffree = minix_count_free_inodes(sbi); | |
308 | buf->f_namelen = sbi->s_namelen; | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int minix_get_block(struct inode *inode, sector_t block, | |
313 | struct buffer_head *bh_result, int create) | |
314 | { | |
315 | if (INODE_VERSION(inode) == MINIX_V1) | |
316 | return V1_minix_get_block(inode, block, bh_result, create); | |
317 | else | |
318 | return V2_minix_get_block(inode, block, bh_result, create); | |
319 | } | |
320 | ||
321 | static int minix_writepage(struct page *page, struct writeback_control *wbc) | |
322 | { | |
323 | return block_write_full_page(page, minix_get_block, wbc); | |
324 | } | |
325 | static int minix_readpage(struct file *file, struct page *page) | |
326 | { | |
327 | return block_read_full_page(page,minix_get_block); | |
328 | } | |
329 | static int minix_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
330 | { | |
331 | return block_prepare_write(page,from,to,minix_get_block); | |
332 | } | |
333 | static sector_t minix_bmap(struct address_space *mapping, sector_t block) | |
334 | { | |
335 | return generic_block_bmap(mapping,block,minix_get_block); | |
336 | } | |
337 | static struct address_space_operations minix_aops = { | |
338 | .readpage = minix_readpage, | |
339 | .writepage = minix_writepage, | |
340 | .sync_page = block_sync_page, | |
341 | .prepare_write = minix_prepare_write, | |
342 | .commit_write = generic_commit_write, | |
343 | .bmap = minix_bmap | |
344 | }; | |
345 | ||
346 | static struct inode_operations minix_symlink_inode_operations = { | |
347 | .readlink = generic_readlink, | |
348 | .follow_link = page_follow_link_light, | |
349 | .put_link = page_put_link, | |
350 | .getattr = minix_getattr, | |
351 | }; | |
352 | ||
353 | void minix_set_inode(struct inode *inode, dev_t rdev) | |
354 | { | |
355 | if (S_ISREG(inode->i_mode)) { | |
356 | inode->i_op = &minix_file_inode_operations; | |
357 | inode->i_fop = &minix_file_operations; | |
358 | inode->i_mapping->a_ops = &minix_aops; | |
359 | } else if (S_ISDIR(inode->i_mode)) { | |
360 | inode->i_op = &minix_dir_inode_operations; | |
361 | inode->i_fop = &minix_dir_operations; | |
362 | inode->i_mapping->a_ops = &minix_aops; | |
363 | } else if (S_ISLNK(inode->i_mode)) { | |
364 | inode->i_op = &minix_symlink_inode_operations; | |
365 | inode->i_mapping->a_ops = &minix_aops; | |
366 | } else | |
367 | init_special_inode(inode, inode->i_mode, rdev); | |
368 | } | |
369 | ||
370 | /* | |
371 | * The minix V1 function to read an inode. | |
372 | */ | |
373 | static void V1_minix_read_inode(struct inode * inode) | |
374 | { | |
375 | struct buffer_head * bh; | |
376 | struct minix_inode * raw_inode; | |
377 | struct minix_inode_info *minix_inode = minix_i(inode); | |
378 | int i; | |
379 | ||
380 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
381 | if (!raw_inode) { | |
382 | make_bad_inode(inode); | |
383 | return; | |
384 | } | |
385 | inode->i_mode = raw_inode->i_mode; | |
386 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
387 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
388 | inode->i_nlink = raw_inode->i_nlinks; | |
389 | inode->i_size = raw_inode->i_size; | |
390 | inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; | |
391 | inode->i_mtime.tv_nsec = 0; | |
392 | inode->i_atime.tv_nsec = 0; | |
393 | inode->i_ctime.tv_nsec = 0; | |
394 | inode->i_blocks = inode->i_blksize = 0; | |
395 | for (i = 0; i < 9; i++) | |
396 | minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; | |
397 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
398 | brelse(bh); | |
399 | } | |
400 | ||
401 | /* | |
402 | * The minix V2 function to read an inode. | |
403 | */ | |
404 | static void V2_minix_read_inode(struct inode * inode) | |
405 | { | |
406 | struct buffer_head * bh; | |
407 | struct minix2_inode * raw_inode; | |
408 | struct minix_inode_info *minix_inode = minix_i(inode); | |
409 | int i; | |
410 | ||
411 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
412 | if (!raw_inode) { | |
413 | make_bad_inode(inode); | |
414 | return; | |
415 | } | |
416 | inode->i_mode = raw_inode->i_mode; | |
417 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
418 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
419 | inode->i_nlink = raw_inode->i_nlinks; | |
420 | inode->i_size = raw_inode->i_size; | |
421 | inode->i_mtime.tv_sec = raw_inode->i_mtime; | |
422 | inode->i_atime.tv_sec = raw_inode->i_atime; | |
423 | inode->i_ctime.tv_sec = raw_inode->i_ctime; | |
424 | inode->i_mtime.tv_nsec = 0; | |
425 | inode->i_atime.tv_nsec = 0; | |
426 | inode->i_ctime.tv_nsec = 0; | |
427 | inode->i_blocks = inode->i_blksize = 0; | |
428 | for (i = 0; i < 10; i++) | |
429 | minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; | |
430 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
431 | brelse(bh); | |
432 | } | |
433 | ||
434 | /* | |
435 | * The global function to read an inode. | |
436 | */ | |
437 | static void minix_read_inode(struct inode * inode) | |
438 | { | |
439 | if (INODE_VERSION(inode) == MINIX_V1) | |
440 | V1_minix_read_inode(inode); | |
441 | else | |
442 | V2_minix_read_inode(inode); | |
443 | } | |
444 | ||
445 | /* | |
446 | * The minix V1 function to synchronize an inode. | |
447 | */ | |
448 | static struct buffer_head * V1_minix_update_inode(struct inode * inode) | |
449 | { | |
450 | struct buffer_head * bh; | |
451 | struct minix_inode * raw_inode; | |
452 | struct minix_inode_info *minix_inode = minix_i(inode); | |
453 | int i; | |
454 | ||
455 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
456 | if (!raw_inode) | |
457 | return NULL; | |
458 | raw_inode->i_mode = inode->i_mode; | |
459 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
460 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
461 | raw_inode->i_nlinks = inode->i_nlink; | |
462 | raw_inode->i_size = inode->i_size; | |
463 | raw_inode->i_time = inode->i_mtime.tv_sec; | |
464 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
465 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
466 | else for (i = 0; i < 9; i++) | |
467 | raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; | |
468 | mark_buffer_dirty(bh); | |
469 | return bh; | |
470 | } | |
471 | ||
472 | /* | |
473 | * The minix V2 function to synchronize an inode. | |
474 | */ | |
475 | static struct buffer_head * V2_minix_update_inode(struct inode * inode) | |
476 | { | |
477 | struct buffer_head * bh; | |
478 | struct minix2_inode * raw_inode; | |
479 | struct minix_inode_info *minix_inode = minix_i(inode); | |
480 | int i; | |
481 | ||
482 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
483 | if (!raw_inode) | |
484 | return NULL; | |
485 | raw_inode->i_mode = inode->i_mode; | |
486 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
487 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
488 | raw_inode->i_nlinks = inode->i_nlink; | |
489 | raw_inode->i_size = inode->i_size; | |
490 | raw_inode->i_mtime = inode->i_mtime.tv_sec; | |
491 | raw_inode->i_atime = inode->i_atime.tv_sec; | |
492 | raw_inode->i_ctime = inode->i_ctime.tv_sec; | |
493 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
494 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
495 | else for (i = 0; i < 10; i++) | |
496 | raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; | |
497 | mark_buffer_dirty(bh); | |
498 | return bh; | |
499 | } | |
500 | ||
501 | static struct buffer_head *minix_update_inode(struct inode *inode) | |
502 | { | |
503 | if (INODE_VERSION(inode) == MINIX_V1) | |
504 | return V1_minix_update_inode(inode); | |
505 | else | |
506 | return V2_minix_update_inode(inode); | |
507 | } | |
508 | ||
509 | static int minix_write_inode(struct inode * inode, int wait) | |
510 | { | |
511 | brelse(minix_update_inode(inode)); | |
512 | return 0; | |
513 | } | |
514 | ||
515 | int minix_sync_inode(struct inode * inode) | |
516 | { | |
517 | int err = 0; | |
518 | struct buffer_head *bh; | |
519 | ||
520 | bh = minix_update_inode(inode); | |
521 | if (bh && buffer_dirty(bh)) | |
522 | { | |
523 | sync_dirty_buffer(bh); | |
524 | if (buffer_req(bh) && !buffer_uptodate(bh)) | |
525 | { | |
526 | printk ("IO error syncing minix inode [%s:%08lx]\n", | |
527 | inode->i_sb->s_id, inode->i_ino); | |
528 | err = -1; | |
529 | } | |
530 | } | |
531 | else if (!bh) | |
532 | err = -1; | |
533 | brelse (bh); | |
534 | return err; | |
535 | } | |
536 | ||
537 | int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
538 | { | |
539 | generic_fillattr(dentry->d_inode, stat); | |
540 | if (INODE_VERSION(dentry->d_inode) == MINIX_V1) | |
541 | stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size); | |
542 | else | |
543 | stat->blocks = (BLOCK_SIZE / 512) * V2_minix_blocks(stat->size); | |
544 | stat->blksize = BLOCK_SIZE; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | /* | |
549 | * The function that is called for file truncation. | |
550 | */ | |
551 | void minix_truncate(struct inode * inode) | |
552 | { | |
553 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) | |
554 | return; | |
555 | if (INODE_VERSION(inode) == MINIX_V1) | |
556 | V1_minix_truncate(inode); | |
557 | else | |
558 | V2_minix_truncate(inode); | |
559 | } | |
560 | ||
561 | static struct super_block *minix_get_sb(struct file_system_type *fs_type, | |
562 | int flags, const char *dev_name, void *data) | |
563 | { | |
564 | return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super); | |
565 | } | |
566 | ||
567 | static struct file_system_type minix_fs_type = { | |
568 | .owner = THIS_MODULE, | |
569 | .name = "minix", | |
570 | .get_sb = minix_get_sb, | |
571 | .kill_sb = kill_block_super, | |
572 | .fs_flags = FS_REQUIRES_DEV, | |
573 | }; | |
574 | ||
575 | static int __init init_minix_fs(void) | |
576 | { | |
577 | int err = init_inodecache(); | |
578 | if (err) | |
579 | goto out1; | |
580 | err = register_filesystem(&minix_fs_type); | |
581 | if (err) | |
582 | goto out; | |
583 | return 0; | |
584 | out: | |
585 | destroy_inodecache(); | |
586 | out1: | |
587 | return err; | |
588 | } | |
589 | ||
590 | static void __exit exit_minix_fs(void) | |
591 | { | |
592 | unregister_filesystem(&minix_fs_type); | |
593 | destroy_inodecache(); | |
594 | } | |
595 | ||
596 | module_init(init_minix_fs) | |
597 | module_exit(exit_minix_fs) | |
598 | MODULE_LICENSE("GPL"); | |
599 |