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 | ||
5ccb4a78 | 27 | static void minix_evict_inode(struct inode *inode) |
1da177e4 | 28 | { |
fef26658 | 29 | truncate_inode_pages(&inode->i_data, 0); |
5ccb4a78 AV |
30 | if (!inode->i_nlink) { |
31 | inode->i_size = 0; | |
32 | minix_truncate(inode); | |
33 | } | |
34 | invalidate_inode_buffers(inode); | |
35 | end_writeback(inode); | |
36 | if (!inode->i_nlink) | |
37 | minix_free_inode(inode); | |
1da177e4 LT |
38 | } |
39 | ||
40 | static void minix_put_super(struct super_block *sb) | |
41 | { | |
42 | int i; | |
43 | struct minix_sb_info *sbi = minix_sb(sb); | |
44 | ||
45 | if (!(sb->s_flags & MS_RDONLY)) { | |
939b00df AB |
46 | if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ |
47 | sbi->s_ms->s_state = sbi->s_mount_state; | |
1da177e4 LT |
48 | mark_buffer_dirty(sbi->s_sbh); |
49 | } | |
50 | for (i = 0; i < sbi->s_imap_blocks; i++) | |
51 | brelse(sbi->s_imap[i]); | |
52 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
53 | brelse(sbi->s_zmap[i]); | |
54 | brelse (sbi->s_sbh); | |
55 | kfree(sbi->s_imap); | |
56 | sb->s_fs_info = NULL; | |
57 | kfree(sbi); | |
1da177e4 LT |
58 | } |
59 | ||
e18b890b | 60 | static struct kmem_cache * minix_inode_cachep; |
1da177e4 LT |
61 | |
62 | static struct inode *minix_alloc_inode(struct super_block *sb) | |
63 | { | |
64 | struct minix_inode_info *ei; | |
e94b1766 | 65 | ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
66 | if (!ei) |
67 | return NULL; | |
68 | return &ei->vfs_inode; | |
69 | } | |
70 | ||
71 | static void minix_destroy_inode(struct inode *inode) | |
72 | { | |
73 | kmem_cache_free(minix_inode_cachep, minix_i(inode)); | |
74 | } | |
75 | ||
51cc5068 | 76 | static void init_once(void *foo) |
1da177e4 LT |
77 | { |
78 | struct minix_inode_info *ei = (struct minix_inode_info *) foo; | |
79 | ||
a35afb83 | 80 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 81 | } |
20c2df83 | 82 | |
1da177e4 LT |
83 | static int init_inodecache(void) |
84 | { | |
85 | minix_inode_cachep = kmem_cache_create("minix_inode_cache", | |
86 | sizeof(struct minix_inode_info), | |
fffb60f9 PJ |
87 | 0, (SLAB_RECLAIM_ACCOUNT| |
88 | SLAB_MEM_SPREAD), | |
20c2df83 | 89 | init_once); |
1da177e4 LT |
90 | if (minix_inode_cachep == NULL) |
91 | return -ENOMEM; | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static void destroy_inodecache(void) | |
96 | { | |
1a1d92c1 | 97 | kmem_cache_destroy(minix_inode_cachep); |
1da177e4 LT |
98 | } |
99 | ||
ee9b6d61 | 100 | static const struct super_operations minix_sops = { |
1da177e4 LT |
101 | .alloc_inode = minix_alloc_inode, |
102 | .destroy_inode = minix_destroy_inode, | |
1da177e4 | 103 | .write_inode = minix_write_inode, |
5ccb4a78 | 104 | .evict_inode = minix_evict_inode, |
1da177e4 LT |
105 | .put_super = minix_put_super, |
106 | .statfs = minix_statfs, | |
107 | .remount_fs = minix_remount, | |
108 | }; | |
109 | ||
110 | static int minix_remount (struct super_block * sb, int * flags, char * data) | |
111 | { | |
112 | struct minix_sb_info * sbi = minix_sb(sb); | |
113 | struct minix_super_block * ms; | |
114 | ||
115 | ms = sbi->s_ms; | |
116 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
117 | return 0; | |
118 | if (*flags & MS_RDONLY) { | |
119 | if (ms->s_state & MINIX_VALID_FS || | |
120 | !(sbi->s_mount_state & MINIX_VALID_FS)) | |
121 | return 0; | |
122 | /* Mounting a rw partition read-only. */ | |
939b00df AB |
123 | if (sbi->s_version != MINIX_V3) |
124 | ms->s_state = sbi->s_mount_state; | |
1da177e4 LT |
125 | mark_buffer_dirty(sbi->s_sbh); |
126 | } else { | |
127 | /* Mount a partition which is read-only, read-write. */ | |
939b00df AB |
128 | if (sbi->s_version != MINIX_V3) { |
129 | sbi->s_mount_state = ms->s_state; | |
130 | ms->s_state &= ~MINIX_VALID_FS; | |
131 | } else { | |
132 | sbi->s_mount_state = MINIX_VALID_FS; | |
133 | } | |
1da177e4 LT |
134 | mark_buffer_dirty(sbi->s_sbh); |
135 | ||
136 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
11b84487 DV |
137 | printk("MINIX-fs warning: remounting unchecked fs, " |
138 | "running fsck is recommended\n"); | |
1da177e4 | 139 | else if ((sbi->s_mount_state & MINIX_ERROR_FS)) |
11b84487 DV |
140 | printk("MINIX-fs warning: remounting fs with errors, " |
141 | "running fsck is recommended\n"); | |
1da177e4 LT |
142 | } |
143 | return 0; | |
144 | } | |
145 | ||
146 | static int minix_fill_super(struct super_block *s, void *data, int silent) | |
147 | { | |
148 | struct buffer_head *bh; | |
149 | struct buffer_head **map; | |
150 | struct minix_super_block *ms; | |
939b00df AB |
151 | struct minix3_super_block *m3s = NULL; |
152 | unsigned long i, block; | |
1da177e4 LT |
153 | struct inode *root_inode; |
154 | struct minix_sb_info *sbi; | |
a90a0880 | 155 | int ret = -EINVAL; |
1da177e4 | 156 | |
f8314dc6 | 157 | sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL); |
1da177e4 LT |
158 | if (!sbi) |
159 | return -ENOMEM; | |
160 | s->s_fs_info = sbi; | |
1da177e4 | 161 | |
2ecd05ae AD |
162 | BUILD_BUG_ON(32 != sizeof (struct minix_inode)); |
163 | BUILD_BUG_ON(64 != sizeof(struct minix2_inode)); | |
1da177e4 LT |
164 | |
165 | if (!sb_set_blocksize(s, BLOCK_SIZE)) | |
166 | goto out_bad_hblock; | |
167 | ||
168 | if (!(bh = sb_bread(s, 1))) | |
169 | goto out_bad_sb; | |
170 | ||
171 | ms = (struct minix_super_block *) bh->b_data; | |
172 | sbi->s_ms = ms; | |
173 | sbi->s_sbh = bh; | |
174 | sbi->s_mount_state = ms->s_state; | |
175 | sbi->s_ninodes = ms->s_ninodes; | |
176 | sbi->s_nzones = ms->s_nzones; | |
177 | sbi->s_imap_blocks = ms->s_imap_blocks; | |
178 | sbi->s_zmap_blocks = ms->s_zmap_blocks; | |
179 | sbi->s_firstdatazone = ms->s_firstdatazone; | |
180 | sbi->s_log_zone_size = ms->s_log_zone_size; | |
181 | sbi->s_max_size = ms->s_max_size; | |
182 | s->s_magic = ms->s_magic; | |
183 | if (s->s_magic == MINIX_SUPER_MAGIC) { | |
184 | sbi->s_version = MINIX_V1; | |
185 | sbi->s_dirsize = 16; | |
186 | sbi->s_namelen = 14; | |
187 | sbi->s_link_max = MINIX_LINK_MAX; | |
188 | } else if (s->s_magic == MINIX_SUPER_MAGIC2) { | |
189 | sbi->s_version = MINIX_V1; | |
190 | sbi->s_dirsize = 32; | |
191 | sbi->s_namelen = 30; | |
192 | sbi->s_link_max = MINIX_LINK_MAX; | |
193 | } else if (s->s_magic == MINIX2_SUPER_MAGIC) { | |
194 | sbi->s_version = MINIX_V2; | |
195 | sbi->s_nzones = ms->s_zones; | |
196 | sbi->s_dirsize = 16; | |
197 | sbi->s_namelen = 14; | |
198 | sbi->s_link_max = MINIX2_LINK_MAX; | |
199 | } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { | |
200 | sbi->s_version = MINIX_V2; | |
201 | sbi->s_nzones = ms->s_zones; | |
202 | sbi->s_dirsize = 32; | |
203 | sbi->s_namelen = 30; | |
204 | sbi->s_link_max = MINIX2_LINK_MAX; | |
939b00df AB |
205 | } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { |
206 | m3s = (struct minix3_super_block *) bh->b_data; | |
207 | s->s_magic = m3s->s_magic; | |
208 | sbi->s_imap_blocks = m3s->s_imap_blocks; | |
209 | sbi->s_zmap_blocks = m3s->s_zmap_blocks; | |
210 | sbi->s_firstdatazone = m3s->s_firstdatazone; | |
211 | sbi->s_log_zone_size = m3s->s_log_zone_size; | |
212 | sbi->s_max_size = m3s->s_max_size; | |
213 | sbi->s_ninodes = m3s->s_ninodes; | |
214 | sbi->s_nzones = m3s->s_zones; | |
215 | sbi->s_dirsize = 64; | |
216 | sbi->s_namelen = 60; | |
217 | sbi->s_version = MINIX_V3; | |
218 | sbi->s_link_max = MINIX2_LINK_MAX; | |
219 | sbi->s_mount_state = MINIX_VALID_FS; | |
220 | sb_set_blocksize(s, m3s->s_blocksize); | |
1da177e4 LT |
221 | } else |
222 | goto out_no_fs; | |
223 | ||
224 | /* | |
225 | * Allocate the buffer map to keep the superblock small. | |
226 | */ | |
f5fb09fa AB |
227 | if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0) |
228 | goto out_illegal_sb; | |
1da177e4 | 229 | i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); |
f8314dc6 | 230 | map = kzalloc(i, GFP_KERNEL); |
1da177e4 LT |
231 | if (!map) |
232 | goto out_no_map; | |
1da177e4 LT |
233 | sbi->s_imap = &map[0]; |
234 | sbi->s_zmap = &map[sbi->s_imap_blocks]; | |
235 | ||
236 | block=2; | |
237 | for (i=0 ; i < sbi->s_imap_blocks ; i++) { | |
238 | if (!(sbi->s_imap[i]=sb_bread(s, block))) | |
239 | goto out_no_bitmap; | |
240 | block++; | |
241 | } | |
242 | for (i=0 ; i < sbi->s_zmap_blocks ; i++) { | |
243 | if (!(sbi->s_zmap[i]=sb_bread(s, block))) | |
244 | goto out_no_bitmap; | |
245 | block++; | |
246 | } | |
247 | ||
248 | minix_set_bit(0,sbi->s_imap[0]->b_data); | |
249 | minix_set_bit(0,sbi->s_zmap[0]->b_data); | |
250 | ||
251 | /* set up enough so that it can read an inode */ | |
252 | s->s_op = &minix_sops; | |
a90a0880 DH |
253 | root_inode = minix_iget(s, MINIX_ROOT_INO); |
254 | if (IS_ERR(root_inode)) { | |
255 | ret = PTR_ERR(root_inode); | |
1da177e4 | 256 | goto out_no_root; |
a90a0880 | 257 | } |
1da177e4 | 258 | |
a90a0880 | 259 | ret = -ENOMEM; |
1da177e4 LT |
260 | s->s_root = d_alloc_root(root_inode); |
261 | if (!s->s_root) | |
262 | goto out_iput; | |
263 | ||
1da177e4 | 264 | if (!(s->s_flags & MS_RDONLY)) { |
939b00df AB |
265 | if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ |
266 | ms->s_state &= ~MINIX_VALID_FS; | |
1da177e4 LT |
267 | mark_buffer_dirty(bh); |
268 | } | |
269 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
11b84487 DV |
270 | printk("MINIX-fs: mounting unchecked file system, " |
271 | "running fsck is recommended\n"); | |
1da177e4 | 272 | else if (sbi->s_mount_state & MINIX_ERROR_FS) |
11b84487 DV |
273 | printk("MINIX-fs: mounting file system with errors, " |
274 | "running fsck is recommended\n"); | |
1da177e4 LT |
275 | return 0; |
276 | ||
277 | out_iput: | |
278 | iput(root_inode); | |
279 | goto out_freemap; | |
280 | ||
281 | out_no_root: | |
282 | if (!silent) | |
283 | printk("MINIX-fs: get root inode failed\n"); | |
284 | goto out_freemap; | |
285 | ||
286 | out_no_bitmap: | |
287 | printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); | |
f5fb09fa | 288 | out_freemap: |
1da177e4 LT |
289 | for (i = 0; i < sbi->s_imap_blocks; i++) |
290 | brelse(sbi->s_imap[i]); | |
291 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
292 | brelse(sbi->s_zmap[i]); | |
293 | kfree(sbi->s_imap); | |
294 | goto out_release; | |
295 | ||
296 | out_no_map: | |
a90a0880 | 297 | ret = -ENOMEM; |
1da177e4 | 298 | if (!silent) |
11b84487 | 299 | printk("MINIX-fs: can't allocate map\n"); |
1da177e4 LT |
300 | goto out_release; |
301 | ||
f5fb09fa AB |
302 | out_illegal_sb: |
303 | if (!silent) | |
304 | printk("MINIX-fs: bad superblock\n"); | |
305 | goto out_release; | |
306 | ||
1da177e4 LT |
307 | out_no_fs: |
308 | if (!silent) | |
939b00df AB |
309 | printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " |
310 | "on device %s.\n", s->s_id); | |
f5fb09fa | 311 | out_release: |
1da177e4 LT |
312 | brelse(bh); |
313 | goto out; | |
314 | ||
315 | out_bad_hblock: | |
11b84487 | 316 | printk("MINIX-fs: blocksize too small for device\n"); |
1da177e4 LT |
317 | goto out; |
318 | ||
319 | out_bad_sb: | |
320 | printk("MINIX-fs: unable to read superblock\n"); | |
f5fb09fa | 321 | out: |
1da177e4 LT |
322 | s->s_fs_info = NULL; |
323 | kfree(sbi); | |
a90a0880 | 324 | return ret; |
1da177e4 LT |
325 | } |
326 | ||
726c3342 | 327 | static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 328 | { |
054475d2 CL |
329 | struct super_block *sb = dentry->d_sb; |
330 | struct minix_sb_info *sbi = minix_sb(sb); | |
331 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
332 | buf->f_type = sb->s_magic; | |
333 | buf->f_bsize = sb->s_blocksize; | |
1da177e4 LT |
334 | buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; |
335 | buf->f_bfree = minix_count_free_blocks(sbi); | |
336 | buf->f_bavail = buf->f_bfree; | |
337 | buf->f_files = sbi->s_ninodes; | |
338 | buf->f_ffree = minix_count_free_inodes(sbi); | |
339 | buf->f_namelen = sbi->s_namelen; | |
054475d2 CL |
340 | buf->f_fsid.val[0] = (u32)id; |
341 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
342 | ||
1da177e4 LT |
343 | return 0; |
344 | } | |
345 | ||
346 | static int minix_get_block(struct inode *inode, sector_t block, | |
347 | struct buffer_head *bh_result, int create) | |
348 | { | |
349 | if (INODE_VERSION(inode) == MINIX_V1) | |
350 | return V1_minix_get_block(inode, block, bh_result, create); | |
351 | else | |
352 | return V2_minix_get_block(inode, block, bh_result, create); | |
353 | } | |
354 | ||
355 | static int minix_writepage(struct page *page, struct writeback_control *wbc) | |
356 | { | |
357 | return block_write_full_page(page, minix_get_block, wbc); | |
358 | } | |
4a66af9e | 359 | |
1da177e4 LT |
360 | static int minix_readpage(struct file *file, struct page *page) |
361 | { | |
362 | return block_read_full_page(page,minix_get_block); | |
363 | } | |
4a66af9e | 364 | |
f4e420dc | 365 | int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 366 | { |
6e1db88d | 367 | return __block_write_begin(page, pos, len, minix_get_block); |
1da177e4 | 368 | } |
4a66af9e NP |
369 | |
370 | static int minix_write_begin(struct file *file, struct address_space *mapping, | |
371 | loff_t pos, unsigned len, unsigned flags, | |
372 | struct page **pagep, void **fsdata) | |
373 | { | |
155130a4 CH |
374 | int ret; |
375 | ||
376 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 377 | minix_get_block); |
155130a4 CH |
378 | if (unlikely(ret)) { |
379 | loff_t isize = mapping->host->i_size; | |
380 | if (pos + len > isize) | |
381 | vmtruncate(mapping->host, isize); | |
382 | } | |
383 | ||
384 | return ret; | |
4a66af9e NP |
385 | } |
386 | ||
1da177e4 LT |
387 | static sector_t minix_bmap(struct address_space *mapping, sector_t block) |
388 | { | |
389 | return generic_block_bmap(mapping,block,minix_get_block); | |
390 | } | |
4a66af9e | 391 | |
f5e54d6e | 392 | static const struct address_space_operations minix_aops = { |
1da177e4 LT |
393 | .readpage = minix_readpage, |
394 | .writepage = minix_writepage, | |
395 | .sync_page = block_sync_page, | |
4a66af9e NP |
396 | .write_begin = minix_write_begin, |
397 | .write_end = generic_write_end, | |
1da177e4 LT |
398 | .bmap = minix_bmap |
399 | }; | |
400 | ||
92e1d5be | 401 | static const struct inode_operations minix_symlink_inode_operations = { |
1da177e4 LT |
402 | .readlink = generic_readlink, |
403 | .follow_link = page_follow_link_light, | |
404 | .put_link = page_put_link, | |
405 | .getattr = minix_getattr, | |
406 | }; | |
407 | ||
408 | void minix_set_inode(struct inode *inode, dev_t rdev) | |
409 | { | |
410 | if (S_ISREG(inode->i_mode)) { | |
411 | inode->i_op = &minix_file_inode_operations; | |
412 | inode->i_fop = &minix_file_operations; | |
413 | inode->i_mapping->a_ops = &minix_aops; | |
414 | } else if (S_ISDIR(inode->i_mode)) { | |
415 | inode->i_op = &minix_dir_inode_operations; | |
416 | inode->i_fop = &minix_dir_operations; | |
417 | inode->i_mapping->a_ops = &minix_aops; | |
418 | } else if (S_ISLNK(inode->i_mode)) { | |
419 | inode->i_op = &minix_symlink_inode_operations; | |
420 | inode->i_mapping->a_ops = &minix_aops; | |
421 | } else | |
422 | init_special_inode(inode, inode->i_mode, rdev); | |
423 | } | |
424 | ||
425 | /* | |
426 | * The minix V1 function to read an inode. | |
427 | */ | |
a90a0880 | 428 | static struct inode *V1_minix_iget(struct inode *inode) |
1da177e4 LT |
429 | { |
430 | struct buffer_head * bh; | |
431 | struct minix_inode * raw_inode; | |
432 | struct minix_inode_info *minix_inode = minix_i(inode); | |
433 | int i; | |
434 | ||
435 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
436 | if (!raw_inode) { | |
a90a0880 DH |
437 | iget_failed(inode); |
438 | return ERR_PTR(-EIO); | |
1da177e4 LT |
439 | } |
440 | inode->i_mode = raw_inode->i_mode; | |
441 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
442 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
443 | inode->i_nlink = raw_inode->i_nlinks; | |
444 | inode->i_size = raw_inode->i_size; | |
445 | inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; | |
446 | inode->i_mtime.tv_nsec = 0; | |
447 | inode->i_atime.tv_nsec = 0; | |
448 | inode->i_ctime.tv_nsec = 0; | |
ba52de12 | 449 | inode->i_blocks = 0; |
1da177e4 LT |
450 | for (i = 0; i < 9; i++) |
451 | minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; | |
452 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
453 | brelse(bh); | |
a90a0880 DH |
454 | unlock_new_inode(inode); |
455 | return inode; | |
1da177e4 LT |
456 | } |
457 | ||
458 | /* | |
459 | * The minix V2 function to read an inode. | |
460 | */ | |
a90a0880 | 461 | static struct inode *V2_minix_iget(struct inode *inode) |
1da177e4 LT |
462 | { |
463 | struct buffer_head * bh; | |
464 | struct minix2_inode * raw_inode; | |
465 | struct minix_inode_info *minix_inode = minix_i(inode); | |
466 | int i; | |
467 | ||
468 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
469 | if (!raw_inode) { | |
a90a0880 DH |
470 | iget_failed(inode); |
471 | return ERR_PTR(-EIO); | |
1da177e4 LT |
472 | } |
473 | inode->i_mode = raw_inode->i_mode; | |
474 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
475 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
476 | inode->i_nlink = raw_inode->i_nlinks; | |
477 | inode->i_size = raw_inode->i_size; | |
478 | inode->i_mtime.tv_sec = raw_inode->i_mtime; | |
479 | inode->i_atime.tv_sec = raw_inode->i_atime; | |
480 | inode->i_ctime.tv_sec = raw_inode->i_ctime; | |
481 | inode->i_mtime.tv_nsec = 0; | |
482 | inode->i_atime.tv_nsec = 0; | |
483 | inode->i_ctime.tv_nsec = 0; | |
ba52de12 | 484 | inode->i_blocks = 0; |
1da177e4 LT |
485 | for (i = 0; i < 10; i++) |
486 | minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; | |
487 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
488 | brelse(bh); | |
a90a0880 DH |
489 | unlock_new_inode(inode); |
490 | return inode; | |
1da177e4 LT |
491 | } |
492 | ||
493 | /* | |
494 | * The global function to read an inode. | |
495 | */ | |
a90a0880 | 496 | struct inode *minix_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 497 | { |
a90a0880 DH |
498 | struct inode *inode; |
499 | ||
500 | inode = iget_locked(sb, ino); | |
501 | if (!inode) | |
502 | return ERR_PTR(-ENOMEM); | |
503 | if (!(inode->i_state & I_NEW)) | |
504 | return inode; | |
505 | ||
1da177e4 | 506 | if (INODE_VERSION(inode) == MINIX_V1) |
a90a0880 | 507 | return V1_minix_iget(inode); |
1da177e4 | 508 | else |
a90a0880 | 509 | return V2_minix_iget(inode); |
1da177e4 LT |
510 | } |
511 | ||
512 | /* | |
513 | * The minix V1 function to synchronize an inode. | |
514 | */ | |
515 | static struct buffer_head * V1_minix_update_inode(struct inode * inode) | |
516 | { | |
517 | struct buffer_head * bh; | |
518 | struct minix_inode * raw_inode; | |
519 | struct minix_inode_info *minix_inode = minix_i(inode); | |
520 | int i; | |
521 | ||
522 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
523 | if (!raw_inode) | |
524 | return NULL; | |
525 | raw_inode->i_mode = inode->i_mode; | |
526 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
527 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
528 | raw_inode->i_nlinks = inode->i_nlink; | |
529 | raw_inode->i_size = inode->i_size; | |
530 | raw_inode->i_time = inode->i_mtime.tv_sec; | |
531 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
532 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
533 | else for (i = 0; i < 9; i++) | |
534 | raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; | |
535 | mark_buffer_dirty(bh); | |
536 | return bh; | |
537 | } | |
538 | ||
539 | /* | |
540 | * The minix V2 function to synchronize an inode. | |
541 | */ | |
542 | static struct buffer_head * V2_minix_update_inode(struct inode * inode) | |
543 | { | |
544 | struct buffer_head * bh; | |
545 | struct minix2_inode * raw_inode; | |
546 | struct minix_inode_info *minix_inode = minix_i(inode); | |
547 | int i; | |
548 | ||
549 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
550 | if (!raw_inode) | |
551 | return NULL; | |
552 | raw_inode->i_mode = inode->i_mode; | |
553 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
554 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
555 | raw_inode->i_nlinks = inode->i_nlink; | |
556 | raw_inode->i_size = inode->i_size; | |
557 | raw_inode->i_mtime = inode->i_mtime.tv_sec; | |
558 | raw_inode->i_atime = inode->i_atime.tv_sec; | |
559 | raw_inode->i_ctime = inode->i_ctime.tv_sec; | |
560 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
561 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
562 | else for (i = 0; i < 10; i++) | |
563 | raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; | |
564 | mark_buffer_dirty(bh); | |
565 | return bh; | |
566 | } | |
567 | ||
a9185b41 | 568 | static int minix_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
569 | { |
570 | int err = 0; | |
571 | struct buffer_head *bh; | |
572 | ||
0d7916d7 AV |
573 | if (INODE_VERSION(inode) == MINIX_V1) |
574 | bh = V1_minix_update_inode(inode); | |
575 | else | |
576 | bh = V2_minix_update_inode(inode); | |
577 | if (!bh) | |
578 | return -EIO; | |
a9185b41 | 579 | if (wbc->sync_mode == WB_SYNC_ALL && buffer_dirty(bh)) { |
1da177e4 | 580 | sync_dirty_buffer(bh); |
0d7916d7 | 581 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
11b84487 | 582 | printk("IO error syncing minix inode [%s:%08lx]\n", |
1da177e4 | 583 | inode->i_sb->s_id, inode->i_ino); |
0d7916d7 | 584 | err = -EIO; |
1da177e4 LT |
585 | } |
586 | } | |
1da177e4 LT |
587 | brelse (bh); |
588 | return err; | |
589 | } | |
590 | ||
591 | int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
592 | { | |
939b00df AB |
593 | struct inode *dir = dentry->d_parent->d_inode; |
594 | struct super_block *sb = dir->i_sb; | |
1da177e4 LT |
595 | generic_fillattr(dentry->d_inode, stat); |
596 | if (INODE_VERSION(dentry->d_inode) == MINIX_V1) | |
939b00df | 597 | stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb); |
1da177e4 | 598 | else |
939b00df AB |
599 | stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb); |
600 | stat->blksize = sb->s_blocksize; | |
1da177e4 LT |
601 | return 0; |
602 | } | |
603 | ||
604 | /* | |
605 | * The function that is called for file truncation. | |
606 | */ | |
607 | void minix_truncate(struct inode * inode) | |
608 | { | |
609 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) | |
610 | return; | |
611 | if (INODE_VERSION(inode) == MINIX_V1) | |
612 | V1_minix_truncate(inode); | |
613 | else | |
614 | V2_minix_truncate(inode); | |
615 | } | |
616 | ||
152a0836 AV |
617 | static struct dentry *minix_mount(struct file_system_type *fs_type, |
618 | int flags, const char *dev_name, void *data) | |
1da177e4 | 619 | { |
152a0836 | 620 | return mount_bdev(fs_type, flags, dev_name, data, minix_fill_super); |
1da177e4 LT |
621 | } |
622 | ||
623 | static struct file_system_type minix_fs_type = { | |
624 | .owner = THIS_MODULE, | |
625 | .name = "minix", | |
152a0836 | 626 | .mount = minix_mount, |
1da177e4 LT |
627 | .kill_sb = kill_block_super, |
628 | .fs_flags = FS_REQUIRES_DEV, | |
629 | }; | |
630 | ||
631 | static int __init init_minix_fs(void) | |
632 | { | |
633 | int err = init_inodecache(); | |
634 | if (err) | |
635 | goto out1; | |
636 | err = register_filesystem(&minix_fs_type); | |
637 | if (err) | |
638 | goto out; | |
639 | return 0; | |
640 | out: | |
641 | destroy_inodecache(); | |
642 | out1: | |
643 | return err; | |
644 | } | |
645 | ||
646 | static void __exit exit_minix_fs(void) | |
647 | { | |
648 | unregister_filesystem(&minix_fs_type); | |
649 | destroy_inodecache(); | |
650 | } | |
651 | ||
652 | module_init(init_minix_fs) | |
653 | module_exit(exit_minix_fs) | |
654 | MODULE_LICENSE("GPL"); | |
655 |