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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 | * | |
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 | ||
fa0d7e3d | 71 | static void minix_i_callback(struct rcu_head *head) |
1da177e4 | 72 | { |
fa0d7e3d NP |
73 | struct inode *inode = container_of(head, struct inode, i_rcu); |
74 | INIT_LIST_HEAD(&inode->i_dentry); | |
1da177e4 LT |
75 | kmem_cache_free(minix_inode_cachep, minix_i(inode)); |
76 | } | |
77 | ||
fa0d7e3d NP |
78 | static void minix_destroy_inode(struct inode *inode) |
79 | { | |
80 | call_rcu(&inode->i_rcu, minix_i_callback); | |
81 | } | |
82 | ||
51cc5068 | 83 | static void init_once(void *foo) |
1da177e4 LT |
84 | { |
85 | struct minix_inode_info *ei = (struct minix_inode_info *) foo; | |
86 | ||
a35afb83 | 87 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 88 | } |
20c2df83 | 89 | |
1da177e4 LT |
90 | static int init_inodecache(void) |
91 | { | |
92 | minix_inode_cachep = kmem_cache_create("minix_inode_cache", | |
93 | sizeof(struct minix_inode_info), | |
fffb60f9 PJ |
94 | 0, (SLAB_RECLAIM_ACCOUNT| |
95 | SLAB_MEM_SPREAD), | |
20c2df83 | 96 | init_once); |
1da177e4 LT |
97 | if (minix_inode_cachep == NULL) |
98 | return -ENOMEM; | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static void destroy_inodecache(void) | |
103 | { | |
1a1d92c1 | 104 | kmem_cache_destroy(minix_inode_cachep); |
1da177e4 LT |
105 | } |
106 | ||
ee9b6d61 | 107 | static const struct super_operations minix_sops = { |
1da177e4 LT |
108 | .alloc_inode = minix_alloc_inode, |
109 | .destroy_inode = minix_destroy_inode, | |
1da177e4 | 110 | .write_inode = minix_write_inode, |
5ccb4a78 | 111 | .evict_inode = minix_evict_inode, |
1da177e4 LT |
112 | .put_super = minix_put_super, |
113 | .statfs = minix_statfs, | |
114 | .remount_fs = minix_remount, | |
115 | }; | |
116 | ||
117 | static int minix_remount (struct super_block * sb, int * flags, char * data) | |
118 | { | |
119 | struct minix_sb_info * sbi = minix_sb(sb); | |
120 | struct minix_super_block * ms; | |
121 | ||
122 | ms = sbi->s_ms; | |
123 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
124 | return 0; | |
125 | if (*flags & MS_RDONLY) { | |
126 | if (ms->s_state & MINIX_VALID_FS || | |
127 | !(sbi->s_mount_state & MINIX_VALID_FS)) | |
128 | return 0; | |
129 | /* Mounting a rw partition read-only. */ | |
939b00df AB |
130 | if (sbi->s_version != MINIX_V3) |
131 | ms->s_state = sbi->s_mount_state; | |
1da177e4 LT |
132 | mark_buffer_dirty(sbi->s_sbh); |
133 | } else { | |
134 | /* Mount a partition which is read-only, read-write. */ | |
939b00df AB |
135 | if (sbi->s_version != MINIX_V3) { |
136 | sbi->s_mount_state = ms->s_state; | |
137 | ms->s_state &= ~MINIX_VALID_FS; | |
138 | } else { | |
139 | sbi->s_mount_state = MINIX_VALID_FS; | |
140 | } | |
1da177e4 LT |
141 | mark_buffer_dirty(sbi->s_sbh); |
142 | ||
143 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
11b84487 DV |
144 | printk("MINIX-fs warning: remounting unchecked fs, " |
145 | "running fsck is recommended\n"); | |
1da177e4 | 146 | else if ((sbi->s_mount_state & MINIX_ERROR_FS)) |
11b84487 DV |
147 | printk("MINIX-fs warning: remounting fs with errors, " |
148 | "running fsck is recommended\n"); | |
1da177e4 LT |
149 | } |
150 | return 0; | |
151 | } | |
152 | ||
153 | static int minix_fill_super(struct super_block *s, void *data, int silent) | |
154 | { | |
155 | struct buffer_head *bh; | |
156 | struct buffer_head **map; | |
157 | struct minix_super_block *ms; | |
939b00df AB |
158 | struct minix3_super_block *m3s = NULL; |
159 | unsigned long i, block; | |
1da177e4 LT |
160 | struct inode *root_inode; |
161 | struct minix_sb_info *sbi; | |
a90a0880 | 162 | int ret = -EINVAL; |
1da177e4 | 163 | |
f8314dc6 | 164 | sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL); |
1da177e4 LT |
165 | if (!sbi) |
166 | return -ENOMEM; | |
167 | s->s_fs_info = sbi; | |
1da177e4 | 168 | |
2ecd05ae AD |
169 | BUILD_BUG_ON(32 != sizeof (struct minix_inode)); |
170 | BUILD_BUG_ON(64 != sizeof(struct minix2_inode)); | |
1da177e4 LT |
171 | |
172 | if (!sb_set_blocksize(s, BLOCK_SIZE)) | |
173 | goto out_bad_hblock; | |
174 | ||
175 | if (!(bh = sb_bread(s, 1))) | |
176 | goto out_bad_sb; | |
177 | ||
178 | ms = (struct minix_super_block *) bh->b_data; | |
179 | sbi->s_ms = ms; | |
180 | sbi->s_sbh = bh; | |
181 | sbi->s_mount_state = ms->s_state; | |
182 | sbi->s_ninodes = ms->s_ninodes; | |
183 | sbi->s_nzones = ms->s_nzones; | |
184 | sbi->s_imap_blocks = ms->s_imap_blocks; | |
185 | sbi->s_zmap_blocks = ms->s_zmap_blocks; | |
186 | sbi->s_firstdatazone = ms->s_firstdatazone; | |
187 | sbi->s_log_zone_size = ms->s_log_zone_size; | |
188 | sbi->s_max_size = ms->s_max_size; | |
189 | s->s_magic = ms->s_magic; | |
190 | if (s->s_magic == MINIX_SUPER_MAGIC) { | |
191 | sbi->s_version = MINIX_V1; | |
192 | sbi->s_dirsize = 16; | |
193 | sbi->s_namelen = 14; | |
194 | sbi->s_link_max = MINIX_LINK_MAX; | |
195 | } else if (s->s_magic == MINIX_SUPER_MAGIC2) { | |
196 | sbi->s_version = MINIX_V1; | |
197 | sbi->s_dirsize = 32; | |
198 | sbi->s_namelen = 30; | |
199 | sbi->s_link_max = MINIX_LINK_MAX; | |
200 | } else if (s->s_magic == MINIX2_SUPER_MAGIC) { | |
201 | sbi->s_version = MINIX_V2; | |
202 | sbi->s_nzones = ms->s_zones; | |
203 | sbi->s_dirsize = 16; | |
204 | sbi->s_namelen = 14; | |
205 | sbi->s_link_max = MINIX2_LINK_MAX; | |
206 | } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { | |
207 | sbi->s_version = MINIX_V2; | |
208 | sbi->s_nzones = ms->s_zones; | |
209 | sbi->s_dirsize = 32; | |
210 | sbi->s_namelen = 30; | |
211 | sbi->s_link_max = MINIX2_LINK_MAX; | |
939b00df AB |
212 | } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { |
213 | m3s = (struct minix3_super_block *) bh->b_data; | |
214 | s->s_magic = m3s->s_magic; | |
215 | sbi->s_imap_blocks = m3s->s_imap_blocks; | |
216 | sbi->s_zmap_blocks = m3s->s_zmap_blocks; | |
217 | sbi->s_firstdatazone = m3s->s_firstdatazone; | |
218 | sbi->s_log_zone_size = m3s->s_log_zone_size; | |
219 | sbi->s_max_size = m3s->s_max_size; | |
220 | sbi->s_ninodes = m3s->s_ninodes; | |
221 | sbi->s_nzones = m3s->s_zones; | |
222 | sbi->s_dirsize = 64; | |
223 | sbi->s_namelen = 60; | |
224 | sbi->s_version = MINIX_V3; | |
225 | sbi->s_link_max = MINIX2_LINK_MAX; | |
226 | sbi->s_mount_state = MINIX_VALID_FS; | |
227 | sb_set_blocksize(s, m3s->s_blocksize); | |
1da177e4 LT |
228 | } else |
229 | goto out_no_fs; | |
230 | ||
231 | /* | |
232 | * Allocate the buffer map to keep the superblock small. | |
233 | */ | |
f5fb09fa AB |
234 | if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0) |
235 | goto out_illegal_sb; | |
1da177e4 | 236 | i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); |
f8314dc6 | 237 | map = kzalloc(i, GFP_KERNEL); |
1da177e4 LT |
238 | if (!map) |
239 | goto out_no_map; | |
1da177e4 LT |
240 | sbi->s_imap = &map[0]; |
241 | sbi->s_zmap = &map[sbi->s_imap_blocks]; | |
242 | ||
243 | block=2; | |
244 | for (i=0 ; i < sbi->s_imap_blocks ; i++) { | |
245 | if (!(sbi->s_imap[i]=sb_bread(s, block))) | |
246 | goto out_no_bitmap; | |
247 | block++; | |
248 | } | |
249 | for (i=0 ; i < sbi->s_zmap_blocks ; i++) { | |
250 | if (!(sbi->s_zmap[i]=sb_bread(s, block))) | |
251 | goto out_no_bitmap; | |
252 | block++; | |
253 | } | |
254 | ||
255 | minix_set_bit(0,sbi->s_imap[0]->b_data); | |
256 | minix_set_bit(0,sbi->s_zmap[0]->b_data); | |
257 | ||
258 | /* set up enough so that it can read an inode */ | |
259 | s->s_op = &minix_sops; | |
a90a0880 DH |
260 | root_inode = minix_iget(s, MINIX_ROOT_INO); |
261 | if (IS_ERR(root_inode)) { | |
262 | ret = PTR_ERR(root_inode); | |
1da177e4 | 263 | goto out_no_root; |
a90a0880 | 264 | } |
1da177e4 | 265 | |
a90a0880 | 266 | ret = -ENOMEM; |
1da177e4 LT |
267 | s->s_root = d_alloc_root(root_inode); |
268 | if (!s->s_root) | |
269 | goto out_iput; | |
270 | ||
1da177e4 | 271 | if (!(s->s_flags & MS_RDONLY)) { |
939b00df AB |
272 | if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ |
273 | ms->s_state &= ~MINIX_VALID_FS; | |
1da177e4 LT |
274 | mark_buffer_dirty(bh); |
275 | } | |
276 | if (!(sbi->s_mount_state & MINIX_VALID_FS)) | |
11b84487 DV |
277 | printk("MINIX-fs: mounting unchecked file system, " |
278 | "running fsck is recommended\n"); | |
1da177e4 | 279 | else if (sbi->s_mount_state & MINIX_ERROR_FS) |
11b84487 DV |
280 | printk("MINIX-fs: mounting file system with errors, " |
281 | "running fsck is recommended\n"); | |
1da177e4 LT |
282 | return 0; |
283 | ||
284 | out_iput: | |
285 | iput(root_inode); | |
286 | goto out_freemap; | |
287 | ||
288 | out_no_root: | |
289 | if (!silent) | |
290 | printk("MINIX-fs: get root inode failed\n"); | |
291 | goto out_freemap; | |
292 | ||
293 | out_no_bitmap: | |
294 | printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); | |
f5fb09fa | 295 | out_freemap: |
1da177e4 LT |
296 | for (i = 0; i < sbi->s_imap_blocks; i++) |
297 | brelse(sbi->s_imap[i]); | |
298 | for (i = 0; i < sbi->s_zmap_blocks; i++) | |
299 | brelse(sbi->s_zmap[i]); | |
300 | kfree(sbi->s_imap); | |
301 | goto out_release; | |
302 | ||
303 | out_no_map: | |
a90a0880 | 304 | ret = -ENOMEM; |
1da177e4 | 305 | if (!silent) |
11b84487 | 306 | printk("MINIX-fs: can't allocate map\n"); |
1da177e4 LT |
307 | goto out_release; |
308 | ||
f5fb09fa AB |
309 | out_illegal_sb: |
310 | if (!silent) | |
311 | printk("MINIX-fs: bad superblock\n"); | |
312 | goto out_release; | |
313 | ||
1da177e4 LT |
314 | out_no_fs: |
315 | if (!silent) | |
939b00df AB |
316 | printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " |
317 | "on device %s.\n", s->s_id); | |
f5fb09fa | 318 | out_release: |
1da177e4 LT |
319 | brelse(bh); |
320 | goto out; | |
321 | ||
322 | out_bad_hblock: | |
11b84487 | 323 | printk("MINIX-fs: blocksize too small for device\n"); |
1da177e4 LT |
324 | goto out; |
325 | ||
326 | out_bad_sb: | |
327 | printk("MINIX-fs: unable to read superblock\n"); | |
f5fb09fa | 328 | out: |
1da177e4 LT |
329 | s->s_fs_info = NULL; |
330 | kfree(sbi); | |
a90a0880 | 331 | return ret; |
1da177e4 LT |
332 | } |
333 | ||
726c3342 | 334 | static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 335 | { |
054475d2 CL |
336 | struct super_block *sb = dentry->d_sb; |
337 | struct minix_sb_info *sbi = minix_sb(sb); | |
338 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
339 | buf->f_type = sb->s_magic; | |
340 | buf->f_bsize = sb->s_blocksize; | |
1da177e4 LT |
341 | buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; |
342 | buf->f_bfree = minix_count_free_blocks(sbi); | |
343 | buf->f_bavail = buf->f_bfree; | |
344 | buf->f_files = sbi->s_ninodes; | |
345 | buf->f_ffree = minix_count_free_inodes(sbi); | |
346 | buf->f_namelen = sbi->s_namelen; | |
054475d2 CL |
347 | buf->f_fsid.val[0] = (u32)id; |
348 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
349 | ||
1da177e4 LT |
350 | return 0; |
351 | } | |
352 | ||
353 | static int minix_get_block(struct inode *inode, sector_t block, | |
354 | struct buffer_head *bh_result, int create) | |
355 | { | |
356 | if (INODE_VERSION(inode) == MINIX_V1) | |
357 | return V1_minix_get_block(inode, block, bh_result, create); | |
358 | else | |
359 | return V2_minix_get_block(inode, block, bh_result, create); | |
360 | } | |
361 | ||
362 | static int minix_writepage(struct page *page, struct writeback_control *wbc) | |
363 | { | |
364 | return block_write_full_page(page, minix_get_block, wbc); | |
365 | } | |
4a66af9e | 366 | |
1da177e4 LT |
367 | static int minix_readpage(struct file *file, struct page *page) |
368 | { | |
369 | return block_read_full_page(page,minix_get_block); | |
370 | } | |
4a66af9e | 371 | |
f4e420dc | 372 | int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) |
1da177e4 | 373 | { |
6e1db88d | 374 | return __block_write_begin(page, pos, len, minix_get_block); |
1da177e4 | 375 | } |
4a66af9e NP |
376 | |
377 | static int minix_write_begin(struct file *file, struct address_space *mapping, | |
378 | loff_t pos, unsigned len, unsigned flags, | |
379 | struct page **pagep, void **fsdata) | |
380 | { | |
155130a4 CH |
381 | int ret; |
382 | ||
383 | ret = block_write_begin(mapping, pos, len, flags, pagep, | |
f4e420dc | 384 | minix_get_block); |
155130a4 CH |
385 | if (unlikely(ret)) { |
386 | loff_t isize = mapping->host->i_size; | |
387 | if (pos + len > isize) | |
388 | vmtruncate(mapping->host, isize); | |
389 | } | |
390 | ||
391 | return ret; | |
4a66af9e NP |
392 | } |
393 | ||
1da177e4 LT |
394 | static sector_t minix_bmap(struct address_space *mapping, sector_t block) |
395 | { | |
396 | return generic_block_bmap(mapping,block,minix_get_block); | |
397 | } | |
4a66af9e | 398 | |
f5e54d6e | 399 | static const struct address_space_operations minix_aops = { |
1da177e4 LT |
400 | .readpage = minix_readpage, |
401 | .writepage = minix_writepage, | |
4a66af9e NP |
402 | .write_begin = minix_write_begin, |
403 | .write_end = generic_write_end, | |
1da177e4 LT |
404 | .bmap = minix_bmap |
405 | }; | |
406 | ||
92e1d5be | 407 | static const struct inode_operations minix_symlink_inode_operations = { |
1da177e4 LT |
408 | .readlink = generic_readlink, |
409 | .follow_link = page_follow_link_light, | |
410 | .put_link = page_put_link, | |
411 | .getattr = minix_getattr, | |
412 | }; | |
413 | ||
414 | void minix_set_inode(struct inode *inode, dev_t rdev) | |
415 | { | |
416 | if (S_ISREG(inode->i_mode)) { | |
417 | inode->i_op = &minix_file_inode_operations; | |
418 | inode->i_fop = &minix_file_operations; | |
419 | inode->i_mapping->a_ops = &minix_aops; | |
420 | } else if (S_ISDIR(inode->i_mode)) { | |
421 | inode->i_op = &minix_dir_inode_operations; | |
422 | inode->i_fop = &minix_dir_operations; | |
423 | inode->i_mapping->a_ops = &minix_aops; | |
424 | } else if (S_ISLNK(inode->i_mode)) { | |
425 | inode->i_op = &minix_symlink_inode_operations; | |
426 | inode->i_mapping->a_ops = &minix_aops; | |
427 | } else | |
428 | init_special_inode(inode, inode->i_mode, rdev); | |
429 | } | |
430 | ||
431 | /* | |
432 | * The minix V1 function to read an inode. | |
433 | */ | |
a90a0880 | 434 | static struct inode *V1_minix_iget(struct inode *inode) |
1da177e4 LT |
435 | { |
436 | struct buffer_head * bh; | |
437 | struct minix_inode * raw_inode; | |
438 | struct minix_inode_info *minix_inode = minix_i(inode); | |
439 | int i; | |
440 | ||
441 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
442 | if (!raw_inode) { | |
a90a0880 DH |
443 | iget_failed(inode); |
444 | return ERR_PTR(-EIO); | |
1da177e4 LT |
445 | } |
446 | inode->i_mode = raw_inode->i_mode; | |
447 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
448 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
449 | inode->i_nlink = raw_inode->i_nlinks; | |
450 | inode->i_size = raw_inode->i_size; | |
451 | inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; | |
452 | inode->i_mtime.tv_nsec = 0; | |
453 | inode->i_atime.tv_nsec = 0; | |
454 | inode->i_ctime.tv_nsec = 0; | |
ba52de12 | 455 | inode->i_blocks = 0; |
1da177e4 LT |
456 | for (i = 0; i < 9; i++) |
457 | minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; | |
458 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
459 | brelse(bh); | |
a90a0880 DH |
460 | unlock_new_inode(inode); |
461 | return inode; | |
1da177e4 LT |
462 | } |
463 | ||
464 | /* | |
465 | * The minix V2 function to read an inode. | |
466 | */ | |
a90a0880 | 467 | static struct inode *V2_minix_iget(struct inode *inode) |
1da177e4 LT |
468 | { |
469 | struct buffer_head * bh; | |
470 | struct minix2_inode * raw_inode; | |
471 | struct minix_inode_info *minix_inode = minix_i(inode); | |
472 | int i; | |
473 | ||
474 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
475 | if (!raw_inode) { | |
a90a0880 DH |
476 | iget_failed(inode); |
477 | return ERR_PTR(-EIO); | |
1da177e4 LT |
478 | } |
479 | inode->i_mode = raw_inode->i_mode; | |
480 | inode->i_uid = (uid_t)raw_inode->i_uid; | |
481 | inode->i_gid = (gid_t)raw_inode->i_gid; | |
482 | inode->i_nlink = raw_inode->i_nlinks; | |
483 | inode->i_size = raw_inode->i_size; | |
484 | inode->i_mtime.tv_sec = raw_inode->i_mtime; | |
485 | inode->i_atime.tv_sec = raw_inode->i_atime; | |
486 | inode->i_ctime.tv_sec = raw_inode->i_ctime; | |
487 | inode->i_mtime.tv_nsec = 0; | |
488 | inode->i_atime.tv_nsec = 0; | |
489 | inode->i_ctime.tv_nsec = 0; | |
ba52de12 | 490 | inode->i_blocks = 0; |
1da177e4 LT |
491 | for (i = 0; i < 10; i++) |
492 | minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; | |
493 | minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); | |
494 | brelse(bh); | |
a90a0880 DH |
495 | unlock_new_inode(inode); |
496 | return inode; | |
1da177e4 LT |
497 | } |
498 | ||
499 | /* | |
500 | * The global function to read an inode. | |
501 | */ | |
a90a0880 | 502 | struct inode *minix_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 503 | { |
a90a0880 DH |
504 | struct inode *inode; |
505 | ||
506 | inode = iget_locked(sb, ino); | |
507 | if (!inode) | |
508 | return ERR_PTR(-ENOMEM); | |
509 | if (!(inode->i_state & I_NEW)) | |
510 | return inode; | |
511 | ||
1da177e4 | 512 | if (INODE_VERSION(inode) == MINIX_V1) |
a90a0880 | 513 | return V1_minix_iget(inode); |
1da177e4 | 514 | else |
a90a0880 | 515 | return V2_minix_iget(inode); |
1da177e4 LT |
516 | } |
517 | ||
518 | /* | |
519 | * The minix V1 function to synchronize an inode. | |
520 | */ | |
521 | static struct buffer_head * V1_minix_update_inode(struct inode * inode) | |
522 | { | |
523 | struct buffer_head * bh; | |
524 | struct minix_inode * raw_inode; | |
525 | struct minix_inode_info *minix_inode = minix_i(inode); | |
526 | int i; | |
527 | ||
528 | raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
529 | if (!raw_inode) | |
530 | return NULL; | |
531 | raw_inode->i_mode = inode->i_mode; | |
532 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
533 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
534 | raw_inode->i_nlinks = inode->i_nlink; | |
535 | raw_inode->i_size = inode->i_size; | |
536 | raw_inode->i_time = inode->i_mtime.tv_sec; | |
537 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
538 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
539 | else for (i = 0; i < 9; i++) | |
540 | raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; | |
541 | mark_buffer_dirty(bh); | |
542 | return bh; | |
543 | } | |
544 | ||
545 | /* | |
546 | * The minix V2 function to synchronize an inode. | |
547 | */ | |
548 | static struct buffer_head * V2_minix_update_inode(struct inode * inode) | |
549 | { | |
550 | struct buffer_head * bh; | |
551 | struct minix2_inode * raw_inode; | |
552 | struct minix_inode_info *minix_inode = minix_i(inode); | |
553 | int i; | |
554 | ||
555 | raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); | |
556 | if (!raw_inode) | |
557 | return NULL; | |
558 | raw_inode->i_mode = inode->i_mode; | |
559 | raw_inode->i_uid = fs_high2lowuid(inode->i_uid); | |
560 | raw_inode->i_gid = fs_high2lowgid(inode->i_gid); | |
561 | raw_inode->i_nlinks = inode->i_nlink; | |
562 | raw_inode->i_size = inode->i_size; | |
563 | raw_inode->i_mtime = inode->i_mtime.tv_sec; | |
564 | raw_inode->i_atime = inode->i_atime.tv_sec; | |
565 | raw_inode->i_ctime = inode->i_ctime.tv_sec; | |
566 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
567 | raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); | |
568 | else for (i = 0; i < 10; i++) | |
569 | raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; | |
570 | mark_buffer_dirty(bh); | |
571 | return bh; | |
572 | } | |
573 | ||
a9185b41 | 574 | static int minix_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
575 | { |
576 | int err = 0; | |
577 | struct buffer_head *bh; | |
578 | ||
0d7916d7 AV |
579 | if (INODE_VERSION(inode) == MINIX_V1) |
580 | bh = V1_minix_update_inode(inode); | |
581 | else | |
582 | bh = V2_minix_update_inode(inode); | |
583 | if (!bh) | |
584 | return -EIO; | |
a9185b41 | 585 | if (wbc->sync_mode == WB_SYNC_ALL && buffer_dirty(bh)) { |
1da177e4 | 586 | sync_dirty_buffer(bh); |
0d7916d7 | 587 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
11b84487 | 588 | printk("IO error syncing minix inode [%s:%08lx]\n", |
1da177e4 | 589 | inode->i_sb->s_id, inode->i_ino); |
0d7916d7 | 590 | err = -EIO; |
1da177e4 LT |
591 | } |
592 | } | |
1da177e4 LT |
593 | brelse (bh); |
594 | return err; | |
595 | } | |
596 | ||
597 | int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) | |
598 | { | |
939b00df AB |
599 | struct inode *dir = dentry->d_parent->d_inode; |
600 | struct super_block *sb = dir->i_sb; | |
1da177e4 LT |
601 | generic_fillattr(dentry->d_inode, stat); |
602 | if (INODE_VERSION(dentry->d_inode) == MINIX_V1) | |
939b00df | 603 | stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb); |
1da177e4 | 604 | else |
939b00df AB |
605 | stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb); |
606 | stat->blksize = sb->s_blocksize; | |
1da177e4 LT |
607 | return 0; |
608 | } | |
609 | ||
610 | /* | |
611 | * The function that is called for file truncation. | |
612 | */ | |
613 | void minix_truncate(struct inode * inode) | |
614 | { | |
615 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) | |
616 | return; | |
617 | if (INODE_VERSION(inode) == MINIX_V1) | |
618 | V1_minix_truncate(inode); | |
619 | else | |
620 | V2_minix_truncate(inode); | |
621 | } | |
622 | ||
152a0836 AV |
623 | static struct dentry *minix_mount(struct file_system_type *fs_type, |
624 | int flags, const char *dev_name, void *data) | |
1da177e4 | 625 | { |
152a0836 | 626 | return mount_bdev(fs_type, flags, dev_name, data, minix_fill_super); |
1da177e4 LT |
627 | } |
628 | ||
629 | static struct file_system_type minix_fs_type = { | |
630 | .owner = THIS_MODULE, | |
631 | .name = "minix", | |
152a0836 | 632 | .mount = minix_mount, |
1da177e4 LT |
633 | .kill_sb = kill_block_super, |
634 | .fs_flags = FS_REQUIRES_DEV, | |
635 | }; | |
636 | ||
637 | static int __init init_minix_fs(void) | |
638 | { | |
639 | int err = init_inodecache(); | |
640 | if (err) | |
641 | goto out1; | |
642 | err = register_filesystem(&minix_fs_type); | |
643 | if (err) | |
644 | goto out; | |
645 | return 0; | |
646 | out: | |
647 | destroy_inodecache(); | |
648 | out1: | |
649 | return err; | |
650 | } | |
651 | ||
652 | static void __exit exit_minix_fs(void) | |
653 | { | |
654 | unregister_filesystem(&minix_fs_type); | |
655 | destroy_inodecache(); | |
656 | } | |
657 | ||
658 | module_init(init_minix_fs) | |
659 | module_exit(exit_minix_fs) | |
660 | MODULE_LICENSE("GPL"); | |
661 |