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1 | /* |
2 | * linux/fs/sysv/inode.c |
3 | * |
4 | * minix/inode.c |
5 | * Copyright (C) 1991, 1992 Linus Torvalds |
6 | * |
7 | * xenix/inode.c |
8 | * Copyright (C) 1992 Doug Evans |
9 | * |
10 | * coh/inode.c |
11 | * Copyright (C) 1993 Pascal Haible, Bruno Haible |
12 | * |
13 | * sysv/inode.c |
14 | * Copyright (C) 1993 Paul B. Monday |
15 | * |
16 | * sysv/inode.c |
17 | * Copyright (C) 1993 Bruno Haible |
18 | * Copyright (C) 1997, 1998 Krzysztof G. Baranowski |
19 | * |
20 | * This file contains code for read/parsing the superblock. |
21 | */ |
22 | |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/buffer_head.h> |
27 | #include "sysv.h" |
28 | |
29 | /* |
30 | * The following functions try to recognize specific filesystems. |
31 | * |
32 | * We recognize: |
33 | * - Xenix FS by its magic number. |
34 | * - SystemV FS by its magic number. |
35 | * - Coherent FS by its funny fname/fpack field. |
36 | * - SCO AFS by s_nfree == 0xffff |
37 | * - V7 FS has no distinguishing features. |
38 | * |
39 | * We discriminate among SystemV4 and SystemV2 FS by the assumption that |
40 | * the time stamp is not < 01-01-1980. |
41 | */ |
42 | |
43 | enum { |
44 | JAN_1_1980 = (10*365 + 2) * 24 * 60 * 60 |
45 | }; |
46 | |
47 | static void detected_xenix(struct sysv_sb_info *sbi) |
48 | { |
49 | struct buffer_head *bh1 = sbi->s_bh1; |
50 | struct buffer_head *bh2 = sbi->s_bh2; |
51 | struct xenix_super_block * sbd1; |
52 | struct xenix_super_block * sbd2; |
53 | |
54 | if (bh1 != bh2) |
55 | sbd1 = sbd2 = (struct xenix_super_block *) bh1->b_data; |
56 | else { |
57 | /* block size = 512, so bh1 != bh2 */ |
58 | sbd1 = (struct xenix_super_block *) bh1->b_data; |
59 | sbd2 = (struct xenix_super_block *) (bh2->b_data - 512); |
60 | } |
61 | |
62 | sbi->s_link_max = XENIX_LINK_MAX; |
63 | sbi->s_fic_size = XENIX_NICINOD; |
64 | sbi->s_flc_size = XENIX_NICFREE; |
65 | sbi->s_sbd1 = (char *)sbd1; |
66 | sbi->s_sbd2 = (char *)sbd2; |
67 | sbi->s_sb_fic_count = &sbd1->s_ninode; |
68 | sbi->s_sb_fic_inodes = &sbd1->s_inode[0]; |
69 | sbi->s_sb_total_free_inodes = &sbd2->s_tinode; |
70 | sbi->s_bcache_count = &sbd1->s_nfree; |
71 | sbi->s_bcache = &sbd1->s_free[0]; |
72 | sbi->s_free_blocks = &sbd2->s_tfree; |
73 | sbi->s_sb_time = &sbd2->s_time; |
74 | sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd1->s_isize); |
75 | sbi->s_nzones = fs32_to_cpu(sbi, sbd1->s_fsize); |
76 | } |
77 | |
78 | static void detected_sysv4(struct sysv_sb_info *sbi) |
79 | { |
80 | struct sysv4_super_block * sbd; |
81 | struct buffer_head *bh1 = sbi->s_bh1; |
82 | struct buffer_head *bh2 = sbi->s_bh2; |
83 | |
84 | if (bh1 == bh2) |
85 | sbd = (struct sysv4_super_block *) (bh1->b_data + BLOCK_SIZE/2); |
86 | else |
87 | sbd = (struct sysv4_super_block *) bh2->b_data; |
88 | |
89 | sbi->s_link_max = SYSV_LINK_MAX; |
90 | sbi->s_fic_size = SYSV_NICINOD; |
91 | sbi->s_flc_size = SYSV_NICFREE; |
92 | sbi->s_sbd1 = (char *)sbd; |
93 | sbi->s_sbd2 = (char *)sbd; |
94 | sbi->s_sb_fic_count = &sbd->s_ninode; |
95 | sbi->s_sb_fic_inodes = &sbd->s_inode[0]; |
96 | sbi->s_sb_total_free_inodes = &sbd->s_tinode; |
97 | sbi->s_bcache_count = &sbd->s_nfree; |
98 | sbi->s_bcache = &sbd->s_free[0]; |
99 | sbi->s_free_blocks = &sbd->s_tfree; |
100 | sbi->s_sb_time = &sbd->s_time; |
101 | sbi->s_sb_state = &sbd->s_state; |
102 | sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize); |
103 | sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); |
104 | } |
105 | |
106 | static void detected_sysv2(struct sysv_sb_info *sbi) |
107 | { |
108 | struct sysv2_super_block *sbd; |
109 | struct buffer_head *bh1 = sbi->s_bh1; |
110 | struct buffer_head *bh2 = sbi->s_bh2; |
111 | |
112 | if (bh1 == bh2) |
113 | sbd = (struct sysv2_super_block *) (bh1->b_data + BLOCK_SIZE/2); |
114 | else |
115 | sbd = (struct sysv2_super_block *) bh2->b_data; |
116 | |
117 | sbi->s_link_max = SYSV_LINK_MAX; |
118 | sbi->s_fic_size = SYSV_NICINOD; |
119 | sbi->s_flc_size = SYSV_NICFREE; |
120 | sbi->s_sbd1 = (char *)sbd; |
121 | sbi->s_sbd2 = (char *)sbd; |
122 | sbi->s_sb_fic_count = &sbd->s_ninode; |
123 | sbi->s_sb_fic_inodes = &sbd->s_inode[0]; |
124 | sbi->s_sb_total_free_inodes = &sbd->s_tinode; |
125 | sbi->s_bcache_count = &sbd->s_nfree; |
126 | sbi->s_bcache = &sbd->s_free[0]; |
127 | sbi->s_free_blocks = &sbd->s_tfree; |
128 | sbi->s_sb_time = &sbd->s_time; |
129 | sbi->s_sb_state = &sbd->s_state; |
130 | sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize); |
131 | sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); |
132 | } |
133 | |
134 | static void detected_coherent(struct sysv_sb_info *sbi) |
135 | { |
136 | struct coh_super_block * sbd; |
137 | struct buffer_head *bh1 = sbi->s_bh1; |
138 | |
139 | sbd = (struct coh_super_block *) bh1->b_data; |
140 | |
141 | sbi->s_link_max = COH_LINK_MAX; |
142 | sbi->s_fic_size = COH_NICINOD; |
143 | sbi->s_flc_size = COH_NICFREE; |
144 | sbi->s_sbd1 = (char *)sbd; |
145 | sbi->s_sbd2 = (char *)sbd; |
146 | sbi->s_sb_fic_count = &sbd->s_ninode; |
147 | sbi->s_sb_fic_inodes = &sbd->s_inode[0]; |
148 | sbi->s_sb_total_free_inodes = &sbd->s_tinode; |
149 | sbi->s_bcache_count = &sbd->s_nfree; |
150 | sbi->s_bcache = &sbd->s_free[0]; |
151 | sbi->s_free_blocks = &sbd->s_tfree; |
152 | sbi->s_sb_time = &sbd->s_time; |
153 | sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize); |
154 | sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); |
155 | } |
156 | |
157 | static void detected_v7(struct sysv_sb_info *sbi) |
158 | { |
159 | struct buffer_head *bh2 = sbi->s_bh2; |
160 | struct v7_super_block *sbd = (struct v7_super_block *)bh2->b_data; |
161 | |
162 | sbi->s_link_max = V7_LINK_MAX; |
163 | sbi->s_fic_size = V7_NICINOD; |
164 | sbi->s_flc_size = V7_NICFREE; |
165 | sbi->s_sbd1 = (char *)sbd; |
166 | sbi->s_sbd2 = (char *)sbd; |
167 | sbi->s_sb_fic_count = &sbd->s_ninode; |
168 | sbi->s_sb_fic_inodes = &sbd->s_inode[0]; |
169 | sbi->s_sb_total_free_inodes = &sbd->s_tinode; |
170 | sbi->s_bcache_count = &sbd->s_nfree; |
171 | sbi->s_bcache = &sbd->s_free[0]; |
172 | sbi->s_free_blocks = &sbd->s_tfree; |
173 | sbi->s_sb_time = &sbd->s_time; |
174 | sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize); |
175 | sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize); |
176 | } |
177 | |
178 | static int detect_xenix(struct sysv_sb_info *sbi, struct buffer_head *bh) |
179 | { |
180 | struct xenix_super_block *sbd = (struct xenix_super_block *)bh->b_data; |
181 | if (*(__le32 *)&sbd->s_magic == cpu_to_le32(0x2b5544)) |
182 | sbi->s_bytesex = BYTESEX_LE; |
183 | else if (*(__be32 *)&sbd->s_magic == cpu_to_be32(0x2b5544)) |
184 | sbi->s_bytesex = BYTESEX_BE; |
185 | else |
186 | return 0; |
187 | switch (fs32_to_cpu(sbi, sbd->s_type)) { |
188 | case 1: |
189 | sbi->s_type = FSTYPE_XENIX; |
190 | return 1; |
191 | case 2: |
192 | sbi->s_type = FSTYPE_XENIX; |
193 | return 2; |
194 | default: |
195 | return 0; |
196 | } |
197 | } |
198 | |
199 | static int detect_sysv(struct sysv_sb_info *sbi, struct buffer_head *bh) |
200 | { |
201 | struct super_block *sb = sbi->s_sb; |
202 | /* All relevant fields are at the same offsets in R2 and R4 */ |
203 | struct sysv4_super_block * sbd; |
204 | u32 type; |
205 | |
206 | sbd = (struct sysv4_super_block *) (bh->b_data + BLOCK_SIZE/2); |
207 | if (*(__le32 *)&sbd->s_magic == cpu_to_le32(0xfd187e20)) |
208 | sbi->s_bytesex = BYTESEX_LE; |
209 | else if (*(__be32 *)&sbd->s_magic == cpu_to_be32(0xfd187e20)) |
210 | sbi->s_bytesex = BYTESEX_BE; |
211 | else |
212 | return 0; |
213 | |
214 | type = fs32_to_cpu(sbi, sbd->s_type); |
215 | |
216 | if (fs16_to_cpu(sbi, sbd->s_nfree) == 0xffff) { |
217 | sbi->s_type = FSTYPE_AFS; |
218 | sbi->s_forced_ro = 1; |
219 | if (!(sb->s_flags & MS_RDONLY)) { |
220 | printk("SysV FS: SCO EAFS on %s detected, " |
221 | "forcing read-only mode.\n", |
222 | sb->s_id); |
223 | } |
224 | return type; |
225 | } |
226 | |
227 | if (fs32_to_cpu(sbi, sbd->s_time) < JAN_1_1980) { |
228 | /* this is likely to happen on SystemV2 FS */ |
229 | if (type > 3 || type < 1) |
230 | return 0; |
231 | sbi->s_type = FSTYPE_SYSV2; |
232 | return type; |
233 | } |
234 | if ((type > 3 || type < 1) && (type > 0x30 || type < 0x10)) |
235 | return 0; |
236 | |
237 | /* On Interactive Unix (ISC) Version 4.0/3.x s_type field = 0x10, |
238 | 0x20 or 0x30 indicates that symbolic links and the 14-character |
239 | filename limit is gone. Due to lack of information about this |
240 | feature read-only mode seems to be a reasonable approach... -KGB */ |
241 | |
242 | if (type >= 0x10) { |
243 | printk("SysV FS: can't handle long file names on %s, " |
244 | "forcing read-only mode.\n", sb->s_id); |
245 | sbi->s_forced_ro = 1; |
246 | } |
247 | |
248 | sbi->s_type = FSTYPE_SYSV4; |
249 | return type >= 0x10 ? type >> 4 : type; |
250 | } |
251 | |
252 | static int detect_coherent(struct sysv_sb_info *sbi, struct buffer_head *bh) |
253 | { |
254 | struct coh_super_block * sbd; |
255 | |
256 | sbd = (struct coh_super_block *) (bh->b_data + BLOCK_SIZE/2); |
257 | if ((memcmp(sbd->s_fname,"noname",6) && memcmp(sbd->s_fname,"xxxxx ",6)) |
258 | || (memcmp(sbd->s_fpack,"nopack",6) && memcmp(sbd->s_fpack,"xxxxx\n",6))) |
259 | return 0; |
260 | sbi->s_bytesex = BYTESEX_PDP; |
261 | sbi->s_type = FSTYPE_COH; |
262 | return 1; |
263 | } |
264 | |
265 | static int detect_sysv_odd(struct sysv_sb_info *sbi, struct buffer_head *bh) |
266 | { |
267 | int size = detect_sysv(sbi, bh); |
268 | |
269 | return size>2 ? 0 : size; |
270 | } |
271 | |
272 | static struct { |
273 | int block; |
274 | int (*test)(struct sysv_sb_info *, struct buffer_head *); |
275 | } flavours[] = { |
276 | {1, detect_xenix}, |
277 | {0, detect_sysv}, |
278 | {0, detect_coherent}, |
279 | {9, detect_sysv_odd}, |
280 | {15,detect_sysv_odd}, |
281 | {18,detect_sysv}, |
282 | }; |
283 | |
284 | static char *flavour_names[] = { |
285 | [FSTYPE_XENIX] = "Xenix", |
286 | [FSTYPE_SYSV4] = "SystemV", |
287 | [FSTYPE_SYSV2] = "SystemV Release 2", |
288 | [FSTYPE_COH] = "Coherent", |
289 | [FSTYPE_V7] = "V7", |
290 | [FSTYPE_AFS] = "AFS", |
291 | }; |
292 | |
293 | static void (*flavour_setup[])(struct sysv_sb_info *) = { |
294 | [FSTYPE_XENIX] = detected_xenix, |
295 | [FSTYPE_SYSV4] = detected_sysv4, |
296 | [FSTYPE_SYSV2] = detected_sysv2, |
297 | [FSTYPE_COH] = detected_coherent, |
298 | [FSTYPE_V7] = detected_v7, |
299 | [FSTYPE_AFS] = detected_sysv4, |
300 | }; |
301 | |
302 | static int complete_read_super(struct super_block *sb, int silent, int size) |
303 | { |
304 | struct sysv_sb_info *sbi = SYSV_SB(sb); |
305 | struct inode *root_inode; |
306 | char *found = flavour_names[sbi->s_type]; |
307 | u_char n_bits = size+8; |
308 | int bsize = 1 << n_bits; |
309 | int bsize_4 = bsize >> 2; |
310 | |
311 | sbi->s_firstinodezone = 2; |
312 | |
313 | flavour_setup[sbi->s_type](sbi); |
314 | |
315 | sbi->s_truncate = 1; |
316 | sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone; |
317 | sbi->s_inodes_per_block = bsize >> 6; |
318 | sbi->s_inodes_per_block_1 = (bsize >> 6)-1; |
319 | sbi->s_inodes_per_block_bits = n_bits-6; |
320 | sbi->s_ind_per_block = bsize_4; |
321 | sbi->s_ind_per_block_2 = bsize_4*bsize_4; |
322 | sbi->s_toobig_block = 10 + bsize_4 * (1 + bsize_4 * (1 + bsize_4)); |
323 | sbi->s_ind_per_block_bits = n_bits-2; |
324 | |
325 | sbi->s_ninodes = (sbi->s_firstdatazone - sbi->s_firstinodezone) |
326 | << sbi->s_inodes_per_block_bits; |
327 | |
328 | if (!silent) |
329 | printk("VFS: Found a %s FS (block size = %ld) on device %s\n", |
330 | found, sb->s_blocksize, sb->s_id); |
331 | |
332 | sb->s_magic = SYSV_MAGIC_BASE + sbi->s_type; |
333 | /* set up enough so that it can read an inode */ |
334 | sb->s_op = &sysv_sops; |
335 | if (sbi->s_forced_ro) |
336 | sb->s_flags |= MS_RDONLY; |
337 | if (sbi->s_truncate) |
338 | sb->s_d_op = &sysv_dentry_operations; |
339 | root_inode = sysv_iget(sb, SYSV_ROOT_INO); |
340 | if (IS_ERR(root_inode)) { |
341 | printk("SysV FS: get root inode failed\n"); |
342 | return 0; |
343 | } |
344 | sb->s_root = d_alloc_root(root_inode); |
345 | if (!sb->s_root) { |
346 | iput(root_inode); |
347 | printk("SysV FS: get root dentry failed\n"); |
348 | return 0; |
349 | } |
350 | return 1; |
351 | } |
352 | |
353 | static int sysv_fill_super(struct super_block *sb, void *data, int silent) |
354 | { |
355 | struct buffer_head *bh1, *bh = NULL; |
356 | struct sysv_sb_info *sbi; |
357 | unsigned long blocknr; |
358 | int size = 0, i; |
359 | |
360 | BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block)); |
361 | BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block)); |
362 | BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block)); |
363 | BUILD_BUG_ON(500 != sizeof (struct coh_super_block)); |
364 | BUILD_BUG_ON(64 != sizeof (struct sysv_inode)); |
365 | |
366 | sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL); |
367 | if (!sbi) |
368 | return -ENOMEM; |
369 | |
370 | sbi->s_sb = sb; |
371 | sbi->s_block_base = 0; |
372 | sb->s_fs_info = sbi; |
373 | |
374 | sb_set_blocksize(sb, BLOCK_SIZE); |
375 | |
376 | for (i = 0; i < ARRAY_SIZE(flavours) && !size; i++) { |
377 | brelse(bh); |
378 | bh = sb_bread(sb, flavours[i].block); |
379 | if (!bh) |
380 | continue; |
381 | size = flavours[i].test(SYSV_SB(sb), bh); |
382 | } |
383 | |
384 | if (!size) |
385 | goto Eunknown; |
386 | |
387 | switch (size) { |
388 | case 1: |
389 | blocknr = bh->b_blocknr << 1; |
390 | brelse(bh); |
391 | sb_set_blocksize(sb, 512); |
392 | bh1 = sb_bread(sb, blocknr); |
393 | bh = sb_bread(sb, blocknr + 1); |
394 | break; |
395 | case 2: |
396 | bh1 = bh; |
397 | break; |
398 | case 3: |
399 | blocknr = bh->b_blocknr >> 1; |
400 | brelse(bh); |
401 | sb_set_blocksize(sb, 2048); |
402 | bh1 = bh = sb_bread(sb, blocknr); |
403 | break; |
404 | default: |
405 | goto Ebadsize; |
406 | } |
407 | |
408 | if (bh && bh1) { |
409 | sbi->s_bh1 = bh1; |
410 | sbi->s_bh2 = bh; |
411 | if (complete_read_super(sb, silent, size)) |
412 | return 0; |
413 | } |
414 | |
415 | brelse(bh1); |
416 | brelse(bh); |
417 | sb_set_blocksize(sb, BLOCK_SIZE); |
418 | printk("oldfs: cannot read superblock\n"); |
419 | failed: |
420 | kfree(sbi); |
421 | return -EINVAL; |
422 | |
423 | Eunknown: |
424 | brelse(bh); |
425 | if (!silent) |
426 | printk("VFS: unable to find oldfs superblock on device %s\n", |
427 | sb->s_id); |
428 | goto failed; |
429 | Ebadsize: |
430 | brelse(bh); |
431 | if (!silent) |
432 | printk("VFS: oldfs: unsupported block size (%dKb)\n", |
433 | 1<<(size-2)); |
434 | goto failed; |
435 | } |
436 | |
437 | static int v7_sanity_check(struct super_block *sb, struct buffer_head *bh) |
438 | { |
439 | struct v7_super_block *v7sb; |
440 | struct sysv_inode *v7i; |
441 | struct buffer_head *bh2; |
442 | struct sysv_sb_info *sbi; |
443 | |
444 | sbi = sb->s_fs_info; |
445 | |
446 | /* plausibility check on superblock */ |
447 | v7sb = (struct v7_super_block *) bh->b_data; |
448 | if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE || |
449 | fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD || |
450 | fs32_to_cpu(sbi, v7sb->s_fsize) > V7_MAXSIZE) |
451 | return 0; |
452 | |
453 | /* plausibility check on root inode: it is a directory, |
454 | with a nonzero size that is a multiple of 16 */ |
455 | bh2 = sb_bread(sb, 2); |
456 | if (bh2 == NULL) |
457 | return 0; |
458 | |
459 | v7i = (struct sysv_inode *)(bh2->b_data + 64); |
460 | if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR || |
461 | (fs32_to_cpu(sbi, v7i->i_size) == 0) || |
462 | (fs32_to_cpu(sbi, v7i->i_size) & 017) || |
463 | (fs32_to_cpu(sbi, v7i->i_size) > V7_NFILES * |
464 | sizeof(struct sysv_dir_entry))) { |
465 | brelse(bh2); |
466 | return 0; |
467 | } |
468 | |
469 | brelse(bh2); |
470 | return 1; |
471 | } |
472 | |
473 | static int v7_fill_super(struct super_block *sb, void *data, int silent) |
474 | { |
475 | struct sysv_sb_info *sbi; |
476 | struct buffer_head *bh; |
477 | |
478 | if (440 != sizeof (struct v7_super_block)) |
479 | panic("V7 FS: bad super-block size"); |
480 | if (64 != sizeof (struct sysv_inode)) |
481 | panic("sysv fs: bad i-node size"); |
482 | |
483 | sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL); |
484 | if (!sbi) |
485 | return -ENOMEM; |
486 | |
487 | sbi->s_sb = sb; |
488 | sbi->s_block_base = 0; |
489 | sbi->s_type = FSTYPE_V7; |
490 | sb->s_fs_info = sbi; |
491 | |
492 | sb_set_blocksize(sb, 512); |
493 | |
494 | if ((bh = sb_bread(sb, 1)) == NULL) { |
495 | if (!silent) |
496 | printk("VFS: unable to read V7 FS superblock on " |
497 | "device %s.\n", sb->s_id); |
498 | goto failed; |
499 | } |
500 | |
501 | /* Try PDP-11 UNIX */ |
502 | sbi->s_bytesex = BYTESEX_PDP; |
503 | if (v7_sanity_check(sb, bh)) |
504 | goto detected; |
505 | |
506 | /* Try PC/IX, v7/x86 */ |
507 | sbi->s_bytesex = BYTESEX_LE; |
508 | if (v7_sanity_check(sb, bh)) |
509 | goto detected; |
510 | |
511 | goto failed; |
512 | |
513 | detected: |
514 | sbi->s_bh1 = bh; |
515 | sbi->s_bh2 = bh; |
516 | if (complete_read_super(sb, silent, 1)) |
517 | return 0; |
518 | |
519 | failed: |
520 | printk(KERN_ERR "VFS: could not find a valid V7 on %s.\n", |
521 | sb->s_id); |
522 | brelse(bh); |
523 | kfree(sbi); |
524 | return -EINVAL; |
525 | } |
526 | |
527 | /* Every kernel module contains stuff like this. */ |
528 | |
529 | static struct dentry *sysv_mount(struct file_system_type *fs_type, |
530 | int flags, const char *dev_name, void *data) |
531 | { |
532 | return mount_bdev(fs_type, flags, dev_name, data, sysv_fill_super); |
533 | } |
534 | |
535 | static struct dentry *v7_mount(struct file_system_type *fs_type, |
536 | int flags, const char *dev_name, void *data) |
537 | { |
538 | return mount_bdev(fs_type, flags, dev_name, data, v7_fill_super); |
539 | } |
540 | |
541 | static struct file_system_type sysv_fs_type = { |
542 | .owner = THIS_MODULE, |
543 | .name = "sysv", |
544 | .mount = sysv_mount, |
545 | .kill_sb = kill_block_super, |
546 | .fs_flags = FS_REQUIRES_DEV, |
547 | }; |
548 | |
549 | static struct file_system_type v7_fs_type = { |
550 | .owner = THIS_MODULE, |
551 | .name = "v7", |
552 | .mount = v7_mount, |
553 | .kill_sb = kill_block_super, |
554 | .fs_flags = FS_REQUIRES_DEV, |
555 | }; |
556 | |
557 | static int __init init_sysv_fs(void) |
558 | { |
559 | int error; |
560 | |
561 | error = sysv_init_icache(); |
562 | if (error) |
563 | goto out; |
564 | error = register_filesystem(&sysv_fs_type); |
565 | if (error) |
566 | goto destroy_icache; |
567 | error = register_filesystem(&v7_fs_type); |
568 | if (error) |
569 | goto unregister; |
570 | return 0; |
571 | |
572 | unregister: |
573 | unregister_filesystem(&sysv_fs_type); |
574 | destroy_icache: |
575 | sysv_destroy_icache(); |
576 | out: |
577 | return error; |
578 | } |
579 | |
580 | static void __exit exit_sysv_fs(void) |
581 | { |
582 | unregister_filesystem(&sysv_fs_type); |
583 | unregister_filesystem(&v7_fs_type); |
584 | sysv_destroy_icache(); |
585 | } |
586 | |
587 | module_init(init_sysv_fs) |
588 | module_exit(exit_sysv_fs) |
589 | MODULE_ALIAS("v7"); |
590 | MODULE_LICENSE("GPL"); |
591 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9