Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/minix/inode.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | * | |
f762dd68 | 6 | * Copyright (C) 1996 Gertjan van Wingerde |
1da177e4 LT |
7 | * Minix V2 fs support. |
8 | * | |
9 | * Modified for 680x0 by Andreas Schwab | |
939b00df | 10 | * Updated to filesystem version 3 by Daniel Aragones |
1da177e4 LT |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include "minix.h" | |
15 | #include <linux/buffer_head.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/highuid.h> | |
19 | #include <linux/vfs.h> | |
a9185b41 | 20 | #include <linux/writeback.h> |
1da177e4 | 21 | |
a9185b41 CH |
22 | static int minix_write_inode(struct inode *inode, |
23 | struct writeback_control *wbc); | |
726c3342 | 24 | static int minix_statfs(struct dentry *dentry, struct kstatfs *buf); |
1da177e4 LT |
25 | static int minix_remount (struct super_block * sb, int * flags, char * data); |
26 | ||
27 | static void minix_delete_inode(struct inode *inode) | |
28 | { | |
fef26658 | 29 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
30 | inode->i_size = 0; |
31 | minix_truncate(inode); | |
32 | minix_free_inode(inode); | |
33 | } | |
34 | ||
35 | static void minix_put_super(struct super_block *sb) | |
36 | { | |
37 | int i; | |
38 | struct minix_sb_info *sbi = minix_sb(sb); | |
39 | ||
40 | if (!(sb->s_flags & MS_RDONLY)) { | |
939b00df AB |
41 | if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ |
42 | sbi->s_ms->s_state = sbi->s_mount_state; | |
1da177e4 LT |
43 | mark_buffer_dirty(sbi->s_sbh); |
44 | } | |
45 | for (i = 0; i < sbi->s_imap_blocks; i++) | |
46 | brelse(sbi->s_imap[i]); | |
47 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
48 | brelse(sbi->s_zmap[i]); | |
49 | brelse (sbi->s_sbh); | |
50 | kfree(sbi->s_imap); | |
51 | sb->s_fs_info = NULL; | |
52 | kfree(sbi); | |
1da177e4 LT |
53 | } |
54 | ||
e18b890b | 55 | static struct kmem_cache * minix_inode_cachep; |
1da177e4 LT |
56 | |
57 | static struct inode *minix_alloc_inode(struct super_block *sb) | |
58 | { | |
59 | struct minix_inode_info *ei; | |
e94b1766 | 60 | ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
61 | if (!ei) |
62 | return NULL; | |
63 | return &ei->vfs_inode; | |
64 | } | |
65 | ||
66 | static void minix_destroy_inode(struct inode *inode) | |
67 | { | |
68 | kmem_cache_free(minix_inode_cachep, minix_i(inode)); | |
69 | } | |
70 | ||
51cc5068 | 71 | static void init_once(void *foo) |
1da177e4 LT |
72 | { |
73 | struct minix_inode_info *ei = (struct minix_inode_info *) foo; | |
74 | ||
a35afb83 | 75 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 76 | } |
20c2df83 | 77 | |
1da177e4 LT |
78 | static int init_inodecache(void) |
79 | { | |
80 | minix_inode_cachep = kmem_cache_create("minix_inode_cache", | |
81 | sizeof(struct minix_inode_info), | |
fffb60f9 PJ |
82 | 0, (SLAB_RECLAIM_ACCOUNT| |
83 | SLAB_MEM_SPREAD), | |
20c2df83 | 84 | init_once); |
1da177e4 LT |
85 | if (minix_inode_cachep == NULL) |
86 | return -ENOMEM; | |
87 | return 0; | |
88 | } | |
89 | ||
90 | static void destroy_inodecache(void) | |
91 | { | |
1a1d92c1 | 92 | kmem_cache_destroy(minix_inode_cachep); |
1da177e4 LT |
93 | } |
94 | ||
ee9b6d61 | 95 | static const struct super_operations minix_sops = { |
1da177e4 LT |
96 | .alloc_inode = minix_alloc_inode, |
97 | .destroy_inode = minix_destroy_inode, | |
1da177e4 LT |
98 | .write_inode = minix_write_inode, |
99 | .delete_inode = minix_delete_inode, | |
100 | .put_super = minix_put_super, | |
101 | .statfs = minix_statfs, | |
102 | .remount_fs = minix_remount, | |
103 | }; | |
104 | ||
105 | static int minix_remount (struct super_block * sb, int * flags, char * data) | |
106 | { | |
107 | struct minix_sb_info * sbi = minix_sb(sb); | |
108 | struct minix_super_block * ms; | |
109 | ||
110 | ms = sbi->s_ms; | |
111 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
112 | return 0; | |
113 | if (*flags & MS_RDONLY) { | |
114 | if (ms->s_state & MINIX_VALID_FS || | |
115 | !(sbi->s_mount_state & MINIX_VALID_FS)) | |
116 | return 0; | |
117 | /* Mounting a rw partition read-only. */ | |
939b00df AB |
118 | if (sbi->s_version != MINIX_V3) |
119 | ms->s_state = sbi->s_mount_state; | |
1da177e4 LT |
120 | mark_buffer_dirty(sbi->s_sbh); |
121 | } else { | |
122 | /* Mount a partition which is read-only, read-write. */ | |
939b00df AB |
123 | if (sbi->s_version != MINIX_V3) { |
124 | sbi->s_mount_state = ms->s_state; | |
125 | ms->s_state &= ~MINIX_VALID_FS; | |
126 | } else { | |
127 | sbi->s_mount_state = MINIX_VALID_FS; | |
128 | } | |
1da177e4 LT |
129 | mark_buffer_dirty(sbi->s_sbh); |
130 | ||
131 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
11b84487 DV |
132 | printk("MINIX-fs warning: remounting unchecked fs, " |
133 | "running fsck is recommended\n"); | |
1da177e4 | 134 | else if ((sbi->s_mount_state & MINIX_ERROR_FS)) |
11b84487 DV |
135 | printk("MINIX-fs warning: remounting fs with errors, " |
136 | "running fsck is recommended\n"); | |
1da177e4 LT |
137 | } |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int minix_fill_super(struct super_block *s, void *data, int silent) | |
142 | { | |
143 | struct buffer_head *bh; | |
144 | struct buffer_head **map; | |
145 | struct minix_super_block *ms; | |
939b00df AB |
146 | struct minix3_super_block *m3s = NULL; |
147 | unsigned long i, block; | |
1da177e4 LT |
148 | struct inode *root_inode; |
149 | struct minix_sb_info *sbi; | |
a90a0880 | 150 | int ret = -EINVAL; |
1da177e4 | 151 | |
f8314dc6 | 152 | sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL); |
1da177e4 LT |
153 | if (!sbi) |
154 | return -ENOMEM; | |
155 | s->s_fs_info = sbi; | |
1da177e4 | 156 | |
2ecd05ae AD |
157 | BUILD_BUG_ON(32 != sizeof (struct minix_inode)); |
158 | BUILD_BUG_ON(64 != sizeof(struct minix2_inode)); | |
1da177e4 LT |
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; | |
939b00df AB |
200 | } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { |
201 | m3s = (struct minix3_super_block *) bh->b_data; | |
202 | s->s_magic = m3s->s_magic; | |
203 | sbi->s_imap_blocks = m3s->s_imap_blocks; | |
204 | sbi->s_zmap_blocks = m3s->s_zmap_blocks; | |
205 | sbi->s_firstdatazone = m3s->s_firstdatazone; | |
206 | sbi->s_log_zone_size = m3s->s_log_zone_size; | |
207 | sbi->s_max_size = m3s->s_max_size; | |
208 | sbi->s_ninodes = m3s->s_ninodes; | |
209 | sbi->s_nzones = m3s->s_zones; | |
210 | sbi->s_dirsize = 64; | |
211 | sbi->s_namelen = 60; | |
212 | sbi->s_version = MINIX_V3; | |
213 | sbi->s_link_max = MINIX2_LINK_MAX; | |
214 | sbi->s_mount_state = MINIX_VALID_FS; | |
215 | sb_set_blocksize(s, m3s->s_blocksize); | |
1da177e4 LT |
216 | } else |
217 | goto out_no_fs; | |
218 | ||
219 | /* | |
220 | * Allocate the buffer map to keep the superblock small. | |
221 | */ | |
f5fb09fa AB |
222 | if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0) |
223 | goto out_illegal_sb; | |
1da177e4 | 224 | i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); |
f8314dc6 | 225 | map = kzalloc(i, GFP_KERNEL); |
1da177e4 LT |
226 | if (!map) |
227 | goto out_no_map; | |
1da177e4 LT |
228 | sbi->s_imap = &map[0]; |
229 | sbi->s_zmap = &map[sbi->s_imap_blocks]; | |
230 | ||
231 | block=2; | |
232 | for (i=0 ; i < sbi->s_imap_blocks ; i++) { | |
233 | if (!(sbi->s_imap[i]=sb_bread(s, block))) | |
234 | goto out_no_bitmap; | |
235 | block++; | |
236 | } | |
237 | for (i=0 ; i < sbi->s_zmap_blocks ; i++) { | |
238 | if (!(sbi->s_zmap[i]=sb_bread(s, block))) | |
239 | goto out_no_bitmap; | |
240 | block++; | |
241 | } | |
242 | ||
243 | minix_set_bit(0,sbi->s_imap[0]->b_data); | |
244 | minix_set_bit(0,sbi->s_zmap[0]->b_data); | |
245 | ||
246 | /* set up enough so that it can read an inode */ | |
247 | s->s_op = &minix_sops; | |
a90a0880 DH |
248 | root_inode = minix_iget(s, MINIX_ROOT_INO); |
249 | if (IS_ERR(root_inode)) { | |
250 | ret = PTR_ERR(root_inode); | |
1da177e4 | 251 | goto out_no_root; |
a90a0880 | 252 | } |
1da177e4 | 253 | |
a90a0880 | 254 | ret = -ENOMEM; |
1da177e4 LT |
255 | s->s_root = d_alloc_root(root_inode); |
256 | if (!s->s_root) | |
257 | goto out_iput; | |
258 | ||
1da177e4 | 259 | if (!(s->s_flags & MS_RDONLY)) { |
939b00df AB |
260 | if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ |
261 | ms->s_state &= ~MINIX_VALID_FS; | |
1da177e4 LT |
262 | mark_buffer_dirty(bh); |
263 | } | |
264 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
11b84487 DV |
265 | printk("MINIX-fs: mounting unchecked file system, " |
266 | "running fsck is recommended\n"); | |
1da177e4 | 267 | else if (sbi->s_mount_state & MINIX_ERROR_FS) |
11b84487 DV |
268 | printk("MINIX-fs: mounting file system with errors, " |
269 | "running fsck is recommended\n"); | |
1da177e4 LT |
270 | return 0; |
271 | ||
272 | out_iput: | |
273 | iput(root_inode); | |
274 | goto out_freemap; | |
275 | ||
276 | out_no_root: | |
277 | if (!silent) | |
278 | printk("MINIX-fs: get root inode failed\n"); | |
279 | goto out_freemap; | |
280 | ||
281 | out_no_bitmap: | |
282 | printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); | |
f5fb09fa | 283 | out_freemap: |
1da177e4 LT |
284 | for (i = 0; i < sbi->s_imap_blocks; i++) |
285 | brelse(sbi->s_imap[i]); | |
286 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
287 | brelse(sbi->s_zmap[i]); | |
288 | kfree(sbi->s_imap); | |
289 | goto out_release; | |
290 | ||
291 | out_no_map: | |
a90a0880 | 292 | ret = -ENOMEM; |
1da177e4 | 293 | if (!silent) |
11b84487 | 294 | printk("MINIX-fs: can't allocate map\n"); |
1da177e4 LT |
295 | goto out_release; |
296 | ||
f5fb09fa AB |
297 | out_illegal_sb: |
298 | if (!silent) | |
299 | printk("MINIX-fs: bad superblock\n"); | |
300 | goto out_release; | |
301 | ||
1da177e4 LT |
302 | out_no_fs: |
303 | if (!silent) | |
939b00df AB |
304 | printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " |
305 | "on device %s.\n", s->s_id); | |
f5fb09fa | 306 | out_release: |
1da177e4 LT |
307 | brelse(bh); |
308 | goto out; | |
309 | ||
310 | out_bad_hblock: | |
11b84487 | 311 | printk("MINIX-fs: blocksize too small for device\n"); |
1da177e4 LT |
312 | goto out; |
313 | ||
314 | out_bad_sb: | |
315 | printk("MINIX-fs: unable to read superblock\n"); | |
f5fb09fa | 316 | out: |
1da177e4 LT |
317 | s->s_fs_info = NULL; |
318 | kfree(sbi); | |
a90a0880 | 319 | return ret; |
1da177e4 LT |
320 | } |
321 | ||
726c3342 | 322 | static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 323 | { |
054475d2 CL |
324 | struct super_block *sb = dentry->d_sb; |
325 | struct minix_sb_info *sbi = minix_sb(sb); | |
326 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
327 | buf->f_type = sb->s_magic; | |
328 | buf->f_bsize = sb->s_blocksize; | |
1da177e4 LT |
329 | buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; |
330 | buf->f_bfree = minix_count_free_blocks(sbi); | |
331 | buf->f_bavail = buf->f_bfree; | |
332 | buf->f_files = sbi->s_ninodes; | |
333 | buf->f_ffree = minix_count_free_inodes(sbi); | |
334 | buf->f_namelen = sbi->s_namelen; | |
054475d2 CL |
335 | buf->f_fsid.val[0] = (u32)id; |
336 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
337 | ||
1da177e4 LT |
338 | return 0; |
339 | } | |
340 | ||
341 | static int minix_get_block(struct inode *inode, sector_t block, | |
342 | struct buffer_head *bh_result, int create) | |
343 | { | |
344 | if (INODE_VERSION(inode) == MINIX_V1) | |
345 | return V1_minix_get_block(inode, block, bh_result, create); | |
346 | else | |
347 | return V2_minix_get_block(inode, block, bh_result, create); | |
348 | } | |
349 | ||
350 | static int minix_writepage(struct page *page, struct writeback_control *wbc) | |
351 | { | |
352 | return block_write_full_page(page, minix_get_block, wbc); | |
353 | } | |
4a66af9e | 354 | |
1da177e4 LT |
355 | static int minix_readpage(struct file *file, struct page *page) |
356 | { | |
357 | return block_read_full_page(page,minix_get_block); | |
358 | } | |
4a66af9e | 359 | |
f4e420dc | 360 | int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 361 | { |
6e1db88d | 362 | return __block_write_begin(page, pos, len, minix_get_block); |
1da177e4 | 363 | } |
4a66af9e NP |
364 | |
365 | static int minix_write_begin(struct file *file, struct address_space *mapping, | |
366 | loff_t pos, unsigned len, unsigned flags, | |
367 | struct page **pagep, void **fsdata) | |
368 | { | |
155130a4 CH |
369 | int ret; |
370 | ||
371 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 372 | minix_get_block); |
155130a4 CH |
373 | if (unlikely(ret)) { |
374 | loff_t isize = mapping->host->i_size; | |
375 | if (pos + len > isize) | |
376 | vmtruncate(mapping->host, isize); | |
377 | } | |
378 | ||
379 | return ret; | |
4a66af9e NP |
380 | } |
381 | ||
1da177e4 LT |
382 | static sector_t minix_bmap(struct address_space *mapping, sector_t block) |
383 | { | |
384 | return generic_block_bmap(mapping,block,minix_get_block); | |
385 | } | |
4a66af9e | 386 | |
f5e54d6e | 387 | static const struct address_space_operations minix_aops = { |
1da177e4 LT |
388 | .readpage = minix_readpage, |
389 | .writepage = minix_writepage, | |
390 | .sync_page = block_sync_page, | |
4a66af9e NP |
391 | .write_begin = minix_write_begin, |
392 | .write_end = generic_write_end, | |
1da177e4 LT |
393 | .bmap = minix_bmap |
394 | }; | |
395 | ||
92e1d5be | 396 | static const struct inode_operations minix_symlink_inode_operations = { |
1da177e4 LT |
397 | .readlink = generic_readlink, |
398 | .follow_link = page_follow_link_light, | |
399 | .put_link = page_put_link, | |
400 | .getattr = minix_getattr, | |
401 | }; | |
402 | ||
403 | void minix_set_inode(struct inode *inode, dev_t rdev) | |
404 | { | |
405 | if (S_ISREG(inode->i_mode)) { | |
406 | inode->i_op = &minix_file_inode_operations; | |
407 | inode->i_fop = &minix_file_operations; | |
408 | inode->i_mapping->a_ops = &minix_aops; | |
409 | } else if (S_ISDIR(inode->i_mode)) { | |
410 | inode->i_op = &minix_dir_inode_operations; | |
411 | inode->i_fop = &minix_dir_operations; | |
412 | inode->i_mapping->a_ops = &minix_aops; | |
413 | } else if (S_ISLNK(inode->i_mode)) { | |
414 | inode->i_op = &minix_symlink_inode_operations; | |
415 | inode->i_mapping->a_ops = &minix_aops; | |
416 | } else | |
417 | init_special_inode(inode, inode->i_mode, rdev); | |
418 | } | |
419 | ||
420 | /* | |
421 | * The minix V1 function to read an inode. | |
422 | */ | |
a90a0880 | 423 | static struct inode *V1_minix_iget(struct inode *inode) |
1da177e4 LT |
424 | { |
425 | struct buffer_head * bh; | |
426 | struct minix_inode * raw_inode; | |
427 | struct minix_inode_info *minix_inode = minix_i(inode); | |
428 | int i; | |
429 | ||
430 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
431 | if (!raw_inode) { | |
a90a0880 DH |
432 | iget_failed(inode); |
433 | return ERR_PTR(-EIO); | |
1da177e4 LT |
434 | } |
435 | inode->i_mode = raw_inode->i_mode; | |
436 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
437 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
438 | inode->i_nlink = raw_inode->i_nlinks; | |
439 | inode->i_size = raw_inode->i_size; | |
440 | inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; | |
441 | inode->i_mtime.tv_nsec = 0; | |
442 | inode->i_atime.tv_nsec = 0; | |
443 | inode->i_ctime.tv_nsec = 0; | |
ba52de12 | 444 | inode->i_blocks = 0; |
1da177e4 LT |
445 | for (i = 0; i < 9; i++) |
446 | minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; | |
447 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
448 | brelse(bh); | |
a90a0880 DH |
449 | unlock_new_inode(inode); |
450 | return inode; | |
1da177e4 LT |
451 | } |
452 | ||
453 | /* | |
454 | * The minix V2 function to read an inode. | |
455 | */ | |
a90a0880 | 456 | static struct inode *V2_minix_iget(struct inode *inode) |
1da177e4 LT |
457 | { |
458 | struct buffer_head * bh; | |
459 | struct minix2_inode * raw_inode; | |
460 | struct minix_inode_info *minix_inode = minix_i(inode); | |
461 | int i; | |
462 | ||
463 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
464 | if (!raw_inode) { | |
a90a0880 DH |
465 | iget_failed(inode); |
466 | return ERR_PTR(-EIO); | |
1da177e4 LT |
467 | } |
468 | inode->i_mode = raw_inode->i_mode; | |
469 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
470 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
471 | inode->i_nlink = raw_inode->i_nlinks; | |
472 | inode->i_size = raw_inode->i_size; | |
473 | inode->i_mtime.tv_sec = raw_inode->i_mtime; | |
474 | inode->i_atime.tv_sec = raw_inode->i_atime; | |
475 | inode->i_ctime.tv_sec = raw_inode->i_ctime; | |
476 | inode->i_mtime.tv_nsec = 0; | |
477 | inode->i_atime.tv_nsec = 0; | |
478 | inode->i_ctime.tv_nsec = 0; | |
ba52de12 | 479 | inode->i_blocks = 0; |
1da177e4 LT |
480 | for (i = 0; i < 10; i++) |
481 | minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; | |
482 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
483 | brelse(bh); | |
a90a0880 DH |
484 | unlock_new_inode(inode); |
485 | return inode; | |
1da177e4 LT |
486 | } |
487 | ||
488 | /* | |
489 | * The global function to read an inode. | |
490 | */ | |
a90a0880 | 491 | struct inode *minix_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 492 | { |
a90a0880 DH |
493 | struct inode *inode; |
494 | ||
495 | inode = iget_locked(sb, ino); | |
496 | if (!inode) | |
497 | return ERR_PTR(-ENOMEM); | |
498 | if (!(inode->i_state & I_NEW)) | |
499 | return inode; | |
500 | ||
1da177e4 | 501 | if (INODE_VERSION(inode) == MINIX_V1) |
a90a0880 | 502 | return V1_minix_iget(inode); |
1da177e4 | 503 | else |
a90a0880 | 504 | return V2_minix_iget(inode); |
1da177e4 LT |
505 | } |
506 | ||
507 | /* | |
508 | * The minix V1 function to synchronize an inode. | |
509 | */ | |
510 | static struct buffer_head * V1_minix_update_inode(struct inode * inode) | |
511 | { | |
512 | struct buffer_head * bh; | |
513 | struct minix_inode * raw_inode; | |
514 | struct minix_inode_info *minix_inode = minix_i(inode); | |
515 | int i; | |
516 | ||
517 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
518 | if (!raw_inode) | |
519 | return NULL; | |
520 | raw_inode->i_mode = inode->i_mode; | |
521 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
522 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
523 | raw_inode->i_nlinks = inode->i_nlink; | |
524 | raw_inode->i_size = inode->i_size; | |
525 | raw_inode->i_time = inode->i_mtime.tv_sec; | |
526 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
527 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
528 | else for (i = 0; i < 9; i++) | |
529 | raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; | |
530 | mark_buffer_dirty(bh); | |
531 | return bh; | |
532 | } | |
533 | ||
534 | /* | |
535 | * The minix V2 function to synchronize an inode. | |
536 | */ | |
537 | static struct buffer_head * V2_minix_update_inode(struct inode * inode) | |
538 | { | |
539 | struct buffer_head * bh; | |
540 | struct minix2_inode * raw_inode; | |
541 | struct minix_inode_info *minix_inode = minix_i(inode); | |
542 | int i; | |
543 | ||
544 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
545 | if (!raw_inode) | |
546 | return NULL; | |
547 | raw_inode->i_mode = inode->i_mode; | |
548 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
549 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
550 | raw_inode->i_nlinks = inode->i_nlink; | |
551 | raw_inode->i_size = inode->i_size; | |
552 | raw_inode->i_mtime = inode->i_mtime.tv_sec; | |
553 | raw_inode->i_atime = inode->i_atime.tv_sec; | |
554 | raw_inode->i_ctime = inode->i_ctime.tv_sec; | |
555 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
556 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
557 | else for (i = 0; i < 10; i++) | |
558 | raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; | |
559 | mark_buffer_dirty(bh); | |
560 | return bh; | |
561 | } | |
562 | ||
a9185b41 | 563 | static int minix_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
564 | { |
565 | int err = 0; | |
566 | struct buffer_head *bh; | |
567 | ||
0d7916d7 AV |
568 | if (INODE_VERSION(inode) == MINIX_V1) |
569 | bh = V1_minix_update_inode(inode); | |
570 | else | |
571 | bh = V2_minix_update_inode(inode); | |
572 | if (!bh) | |
573 | return -EIO; | |
a9185b41 | 574 | if (wbc->sync_mode == WB_SYNC_ALL && buffer_dirty(bh)) { |
1da177e4 | 575 | sync_dirty_buffer(bh); |
0d7916d7 | 576 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
11b84487 | 577 | printk("IO error syncing minix inode [%s:%08lx]\n", |
1da177e4 | 578 | inode->i_sb->s_id, inode->i_ino); |
0d7916d7 | 579 | err = -EIO; |
1da177e4 LT |
580 | } |
581 | } | |
1da177e4 LT |
582 | brelse (bh); |
583 | return err; | |
584 | } | |
585 | ||
586 | int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
587 | { | |
939b00df AB |
588 | struct inode *dir = dentry->d_parent->d_inode; |
589 | struct super_block *sb = dir->i_sb; | |
1da177e4 LT |
590 | generic_fillattr(dentry->d_inode, stat); |
591 | if (INODE_VERSION(dentry->d_inode) == MINIX_V1) | |
939b00df | 592 | stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb); |
1da177e4 | 593 | else |
939b00df AB |
594 | stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb); |
595 | stat->blksize = sb->s_blocksize; | |
1da177e4 LT |
596 | return 0; |
597 | } | |
598 | ||
599 | /* | |
600 | * The function that is called for file truncation. | |
601 | */ | |
602 | void minix_truncate(struct inode * inode) | |
603 | { | |
604 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) | |
605 | return; | |
606 | if (INODE_VERSION(inode) == MINIX_V1) | |
607 | V1_minix_truncate(inode); | |
608 | else | |
609 | V2_minix_truncate(inode); | |
610 | } | |
611 | ||
454e2398 DH |
612 | static int minix_get_sb(struct file_system_type *fs_type, |
613 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 614 | { |
454e2398 DH |
615 | return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super, |
616 | mnt); | |
1da177e4 LT |
617 | } |
618 | ||
619 | static struct file_system_type minix_fs_type = { | |
620 | .owner = THIS_MODULE, | |
621 | .name = "minix", | |
622 | .get_sb = minix_get_sb, | |
623 | .kill_sb = kill_block_super, | |
624 | .fs_flags = FS_REQUIRES_DEV, | |
625 | }; | |
626 | ||
627 | static int __init init_minix_fs(void) | |
628 | { | |
629 | int err = init_inodecache(); | |
630 | if (err) | |
631 | goto out1; | |
632 | err = register_filesystem(&minix_fs_type); | |
633 | if (err) | |
634 | goto out; | |
635 | return 0; | |
636 | out: | |
637 | destroy_inodecache(); | |
638 | out1: | |
639 | return err; | |
640 | } | |
641 | ||
642 | static void __exit exit_minix_fs(void) | |
643 | { | |
644 | unregister_filesystem(&minix_fs_type); | |
645 | destroy_inodecache(); | |
646 | } | |
647 | ||
648 | module_init(init_minix_fs) | |
649 | module_exit(exit_minix_fs) | |
650 | MODULE_LICENSE("GPL"); | |
651 |