Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/adfs/super.c | |
3 | * | |
4 | * Copyright (C) 1997-1999 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/module.h> | |
1da177e4 | 11 | #include <linux/init.h> |
1da177e4 | 12 | #include <linux/parser.h> |
e11400b0 MS |
13 | #include <linux/mount.h> |
14 | #include <linux/seq_file.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
608ba50b | 16 | #include <linux/statfs.h> |
c010d1ff | 17 | #include <linux/user_namespace.h> |
1da177e4 LT |
18 | #include "adfs.h" |
19 | #include "dir_f.h" | |
20 | #include "dir_fplus.h" | |
21 | ||
421d3c0f RK |
22 | #define ADFS_SB_FLAGS SB_NOATIME |
23 | ||
e11400b0 MS |
24 | #define ADFS_DEFAULT_OWNER_MASK S_IRWXU |
25 | #define ADFS_DEFAULT_OTHER_MASK (S_IRWXG | S_IRWXO) | |
26 | ||
1da177e4 LT |
27 | void __adfs_error(struct super_block *sb, const char *function, const char *fmt, ...) |
28 | { | |
2e67080d | 29 | struct va_format vaf; |
1da177e4 LT |
30 | va_list args; |
31 | ||
32 | va_start(args, fmt); | |
2e67080d RK |
33 | vaf.fmt = fmt; |
34 | vaf.va = &args; | |
1da177e4 | 35 | |
2e67080d | 36 | printk(KERN_CRIT "ADFS-fs error (device %s)%s%s: %pV\n", |
1da177e4 | 37 | sb->s_id, function ? ": " : "", |
2e67080d RK |
38 | function ? function : "", &vaf); |
39 | ||
40 | va_end(args); | |
1da177e4 LT |
41 | } |
42 | ||
ceb3b106 RK |
43 | void adfs_msg(struct super_block *sb, const char *pfx, const char *fmt, ...) |
44 | { | |
45 | struct va_format vaf; | |
46 | va_list args; | |
47 | ||
48 | va_start(args, fmt); | |
49 | vaf.fmt = fmt; | |
50 | vaf.va = &args; | |
51 | printk("%sADFS-fs (%s): %pV\n", pfx, sb->s_id, &vaf); | |
52 | va_end(args); | |
53 | } | |
54 | ||
1da177e4 LT |
55 | static int adfs_checkdiscrecord(struct adfs_discrecord *dr) |
56 | { | |
57 | int i; | |
58 | ||
59 | /* sector size must be 256, 512 or 1024 bytes */ | |
60 | if (dr->log2secsize != 8 && | |
61 | dr->log2secsize != 9 && | |
62 | dr->log2secsize != 10) | |
63 | return 1; | |
64 | ||
65 | /* idlen must be at least log2secsize + 3 */ | |
66 | if (dr->idlen < dr->log2secsize + 3) | |
67 | return 1; | |
68 | ||
69 | /* we cannot have such a large disc that we | |
70 | * are unable to represent sector offsets in | |
71 | * 32 bits. This works out at 2.0 TB. | |
72 | */ | |
73 | if (le32_to_cpu(dr->disc_size_high) >> dr->log2secsize) | |
74 | return 1; | |
75 | ||
76 | /* idlen must be no greater than 19 v2 [1.0] */ | |
77 | if (dr->idlen > 19) | |
78 | return 1; | |
79 | ||
80 | /* reserved bytes should be zero */ | |
81 | for (i = 0; i < sizeof(dr->unused52); i++) | |
82 | if (dr->unused52[i] != 0) | |
83 | return 1; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | static unsigned char adfs_calczonecheck(struct super_block *sb, unsigned char *map) | |
89 | { | |
90 | unsigned int v0, v1, v2, v3; | |
91 | int i; | |
92 | ||
93 | v0 = v1 = v2 = v3 = 0; | |
94 | for (i = sb->s_blocksize - 4; i; i -= 4) { | |
95 | v0 += map[i] + (v3 >> 8); | |
96 | v3 &= 0xff; | |
97 | v1 += map[i + 1] + (v0 >> 8); | |
98 | v0 &= 0xff; | |
99 | v2 += map[i + 2] + (v1 >> 8); | |
100 | v1 &= 0xff; | |
101 | v3 += map[i + 3] + (v2 >> 8); | |
102 | v2 &= 0xff; | |
103 | } | |
104 | v0 += v3 >> 8; | |
105 | v1 += map[1] + (v0 >> 8); | |
106 | v2 += map[2] + (v1 >> 8); | |
107 | v3 += map[3] + (v2 >> 8); | |
108 | ||
109 | return v0 ^ v1 ^ v2 ^ v3; | |
110 | } | |
111 | ||
112 | static int adfs_checkmap(struct super_block *sb, struct adfs_discmap *dm) | |
113 | { | |
114 | unsigned char crosscheck = 0, zonecheck = 1; | |
115 | int i; | |
116 | ||
117 | for (i = 0; i < ADFS_SB(sb)->s_map_size; i++) { | |
118 | unsigned char *map; | |
119 | ||
120 | map = dm[i].dm_bh->b_data; | |
121 | ||
122 | if (adfs_calczonecheck(sb, map) != map[0]) { | |
123 | adfs_error(sb, "zone %d fails zonecheck", i); | |
124 | zonecheck = 0; | |
125 | } | |
126 | crosscheck ^= map[3]; | |
127 | } | |
128 | if (crosscheck != 0xff) | |
129 | adfs_error(sb, "crosscheck != 0xff"); | |
130 | return crosscheck == 0xff && zonecheck; | |
131 | } | |
132 | ||
133 | static void adfs_put_super(struct super_block *sb) | |
134 | { | |
135 | int i; | |
136 | struct adfs_sb_info *asb = ADFS_SB(sb); | |
137 | ||
138 | for (i = 0; i < asb->s_map_size; i++) | |
139 | brelse(asb->s_map[i].dm_bh); | |
140 | kfree(asb->s_map); | |
2d1d9b5b | 141 | kfree_rcu(asb, rcu); |
1da177e4 LT |
142 | } |
143 | ||
34c80b1d | 144 | static int adfs_show_options(struct seq_file *seq, struct dentry *root) |
e11400b0 | 145 | { |
34c80b1d | 146 | struct adfs_sb_info *asb = ADFS_SB(root->d_sb); |
e11400b0 | 147 | |
c010d1ff EB |
148 | if (!uid_eq(asb->s_uid, GLOBAL_ROOT_UID)) |
149 | seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, asb->s_uid)); | |
150 | if (!gid_eq(asb->s_gid, GLOBAL_ROOT_GID)) | |
151 | seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, asb->s_gid)); | |
e11400b0 MS |
152 | if (asb->s_owner_mask != ADFS_DEFAULT_OWNER_MASK) |
153 | seq_printf(seq, ",ownmask=%o", asb->s_owner_mask); | |
154 | if (asb->s_other_mask != ADFS_DEFAULT_OTHER_MASK) | |
155 | seq_printf(seq, ",othmask=%o", asb->s_other_mask); | |
da23ef05 SS |
156 | if (asb->s_ftsuffix != 0) |
157 | seq_printf(seq, ",ftsuffix=%u", asb->s_ftsuffix); | |
e11400b0 MS |
158 | |
159 | return 0; | |
160 | } | |
161 | ||
da23ef05 | 162 | enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_ftsuffix, Opt_err}; |
1da177e4 | 163 | |
a447c093 | 164 | static const match_table_t tokens = { |
1da177e4 LT |
165 | {Opt_uid, "uid=%u"}, |
166 | {Opt_gid, "gid=%u"}, | |
167 | {Opt_ownmask, "ownmask=%o"}, | |
168 | {Opt_othmask, "othmask=%o"}, | |
da23ef05 | 169 | {Opt_ftsuffix, "ftsuffix=%u"}, |
1da177e4 LT |
170 | {Opt_err, NULL} |
171 | }; | |
172 | ||
173 | static int parse_options(struct super_block *sb, char *options) | |
174 | { | |
175 | char *p; | |
176 | struct adfs_sb_info *asb = ADFS_SB(sb); | |
177 | int option; | |
178 | ||
179 | if (!options) | |
180 | return 0; | |
181 | ||
182 | while ((p = strsep(&options, ",")) != NULL) { | |
183 | substring_t args[MAX_OPT_ARGS]; | |
184 | int token; | |
185 | if (!*p) | |
186 | continue; | |
187 | ||
188 | token = match_token(p, tokens, args); | |
189 | switch (token) { | |
190 | case Opt_uid: | |
191 | if (match_int(args, &option)) | |
192 | return -EINVAL; | |
c010d1ff EB |
193 | asb->s_uid = make_kuid(current_user_ns(), option); |
194 | if (!uid_valid(asb->s_uid)) | |
195 | return -EINVAL; | |
1da177e4 LT |
196 | break; |
197 | case Opt_gid: | |
198 | if (match_int(args, &option)) | |
199 | return -EINVAL; | |
c010d1ff EB |
200 | asb->s_gid = make_kgid(current_user_ns(), option); |
201 | if (!gid_valid(asb->s_gid)) | |
202 | return -EINVAL; | |
1da177e4 LT |
203 | break; |
204 | case Opt_ownmask: | |
205 | if (match_octal(args, &option)) | |
206 | return -EINVAL; | |
207 | asb->s_owner_mask = option; | |
208 | break; | |
209 | case Opt_othmask: | |
210 | if (match_octal(args, &option)) | |
211 | return -EINVAL; | |
212 | asb->s_other_mask = option; | |
213 | break; | |
da23ef05 SS |
214 | case Opt_ftsuffix: |
215 | if (match_int(args, &option)) | |
216 | return -EINVAL; | |
217 | asb->s_ftsuffix = option; | |
218 | break; | |
1da177e4 | 219 | default: |
ceb3b106 RK |
220 | adfs_msg(sb, KERN_ERR, |
221 | "unrecognised mount option \"%s\" or missing value", | |
222 | p); | |
1da177e4 LT |
223 | return -EINVAL; |
224 | } | |
225 | } | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int adfs_remount(struct super_block *sb, int *flags, char *data) | |
230 | { | |
02b9984d | 231 | sync_filesystem(sb); |
421d3c0f | 232 | *flags |= ADFS_SB_FLAGS; |
1da177e4 LT |
233 | return parse_options(sb, data); |
234 | } | |
235 | ||
726c3342 | 236 | static int adfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 237 | { |
accb4012 CL |
238 | struct super_block *sb = dentry->d_sb; |
239 | struct adfs_sb_info *sbi = ADFS_SB(sb); | |
275f5b99 | 240 | struct adfs_discrecord *dr = adfs_map_discrecord(sbi->s_map); |
accb4012 | 241 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4 LT |
242 | |
243 | buf->f_type = ADFS_SUPER_MAGIC; | |
accb4012 CL |
244 | buf->f_namelen = sbi->s_namelen; |
245 | buf->f_bsize = sb->s_blocksize; | |
275f5b99 | 246 | buf->f_blocks = adfs_disc_size(dr) >> sb->s_blocksize_bits; |
accb4012 | 247 | buf->f_files = sbi->s_ids_per_zone * sbi->s_map_size; |
1da177e4 | 248 | buf->f_bavail = |
accb4012 | 249 | buf->f_bfree = adfs_map_free(sb); |
1da177e4 | 250 | buf->f_ffree = (long)(buf->f_bfree * buf->f_files) / (long)buf->f_blocks; |
accb4012 CL |
251 | buf->f_fsid.val[0] = (u32)id; |
252 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
253 | |
254 | return 0; | |
255 | } | |
256 | ||
e18b890b | 257 | static struct kmem_cache *adfs_inode_cachep; |
1da177e4 LT |
258 | |
259 | static struct inode *adfs_alloc_inode(struct super_block *sb) | |
260 | { | |
261 | struct adfs_inode_info *ei; | |
d96f1845 | 262 | ei = kmem_cache_alloc(adfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
263 | if (!ei) |
264 | return NULL; | |
265 | return &ei->vfs_inode; | |
266 | } | |
267 | ||
8f05a795 | 268 | static void adfs_free_inode(struct inode *inode) |
1da177e4 LT |
269 | { |
270 | kmem_cache_free(adfs_inode_cachep, ADFS_I(inode)); | |
271 | } | |
272 | ||
51cc5068 | 273 | static void init_once(void *foo) |
1da177e4 LT |
274 | { |
275 | struct adfs_inode_info *ei = (struct adfs_inode_info *) foo; | |
276 | ||
a35afb83 | 277 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 278 | } |
20c2df83 | 279 | |
894122db | 280 | static int __init init_inodecache(void) |
1da177e4 LT |
281 | { |
282 | adfs_inode_cachep = kmem_cache_create("adfs_inode_cache", | |
283 | sizeof(struct adfs_inode_info), | |
fffb60f9 | 284 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 285 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 286 | init_once); |
1da177e4 LT |
287 | if (adfs_inode_cachep == NULL) |
288 | return -ENOMEM; | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static void destroy_inodecache(void) | |
293 | { | |
8c0a8537 KS |
294 | /* |
295 | * Make sure all delayed rcu free inodes are flushed before we | |
296 | * destroy cache. | |
297 | */ | |
298 | rcu_barrier(); | |
1a1d92c1 | 299 | kmem_cache_destroy(adfs_inode_cachep); |
1da177e4 LT |
300 | } |
301 | ||
ee9b6d61 | 302 | static const struct super_operations adfs_sops = { |
1da177e4 | 303 | .alloc_inode = adfs_alloc_inode, |
8f05a795 | 304 | .free_inode = adfs_free_inode, |
d8e78da8 | 305 | .drop_inode = generic_delete_inode, |
1da177e4 LT |
306 | .write_inode = adfs_write_inode, |
307 | .put_super = adfs_put_super, | |
308 | .statfs = adfs_statfs, | |
309 | .remount_fs = adfs_remount, | |
e11400b0 | 310 | .show_options = adfs_show_options, |
1da177e4 LT |
311 | }; |
312 | ||
313 | static struct adfs_discmap *adfs_read_map(struct super_block *sb, struct adfs_discrecord *dr) | |
314 | { | |
315 | struct adfs_discmap *dm; | |
316 | unsigned int map_addr, zone_size, nzones; | |
317 | int i, zone; | |
318 | struct adfs_sb_info *asb = ADFS_SB(sb); | |
319 | ||
320 | nzones = asb->s_map_size; | |
321 | zone_size = (8 << dr->log2secsize) - le16_to_cpu(dr->zone_spare); | |
322 | map_addr = (nzones >> 1) * zone_size - | |
323 | ((nzones > 1) ? ADFS_DR_SIZE_BITS : 0); | |
324 | map_addr = signed_asl(map_addr, asb->s_map2blk); | |
325 | ||
326 | asb->s_ids_per_zone = zone_size / (asb->s_idlen + 1); | |
327 | ||
6da2ec56 | 328 | dm = kmalloc_array(nzones, sizeof(*dm), GFP_KERNEL); |
1da177e4 LT |
329 | if (dm == NULL) { |
330 | adfs_error(sb, "not enough memory"); | |
b7964106 | 331 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
332 | } |
333 | ||
334 | for (zone = 0; zone < nzones; zone++, map_addr++) { | |
335 | dm[zone].dm_startbit = 0; | |
336 | dm[zone].dm_endbit = zone_size; | |
337 | dm[zone].dm_startblk = zone * zone_size - ADFS_DR_SIZE_BITS; | |
338 | dm[zone].dm_bh = sb_bread(sb, map_addr); | |
339 | ||
340 | if (!dm[zone].dm_bh) { | |
341 | adfs_error(sb, "unable to read map"); | |
342 | goto error_free; | |
343 | } | |
344 | } | |
345 | ||
346 | /* adjust the limits for the first and last map zones */ | |
347 | i = zone - 1; | |
348 | dm[0].dm_startblk = 0; | |
349 | dm[0].dm_startbit = ADFS_DR_SIZE_BITS; | |
275f5b99 | 350 | dm[i].dm_endbit = (adfs_disc_size(dr) >> dr->log2bpmb) + |
1da177e4 LT |
351 | (ADFS_DR_SIZE_BITS - i * zone_size); |
352 | ||
353 | if (adfs_checkmap(sb, dm)) | |
354 | return dm; | |
355 | ||
1725cd0a | 356 | adfs_error(sb, "map corrupted"); |
1da177e4 LT |
357 | |
358 | error_free: | |
359 | while (--zone >= 0) | |
360 | brelse(dm[zone].dm_bh); | |
361 | ||
362 | kfree(dm); | |
b7964106 | 363 | return ERR_PTR(-EIO); |
1da177e4 LT |
364 | } |
365 | ||
1da177e4 LT |
366 | static int adfs_fill_super(struct super_block *sb, void *data, int silent) |
367 | { | |
368 | struct adfs_discrecord *dr; | |
369 | struct buffer_head *bh; | |
370 | struct object_info root_obj; | |
371 | unsigned char *b_data; | |
372 | struct adfs_sb_info *asb; | |
373 | struct inode *root; | |
b7964106 | 374 | int ret = -EINVAL; |
1da177e4 | 375 | |
421d3c0f | 376 | sb->s_flags |= ADFS_SB_FLAGS; |
1da177e4 | 377 | |
f8314dc6 | 378 | asb = kzalloc(sizeof(*asb), GFP_KERNEL); |
4688a066 | 379 | if (!asb) |
1da177e4 LT |
380 | return -ENOMEM; |
381 | sb->s_fs_info = asb; | |
1da177e4 LT |
382 | |
383 | /* set default options */ | |
c010d1ff EB |
384 | asb->s_uid = GLOBAL_ROOT_UID; |
385 | asb->s_gid = GLOBAL_ROOT_GID; | |
e11400b0 MS |
386 | asb->s_owner_mask = ADFS_DEFAULT_OWNER_MASK; |
387 | asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK; | |
da23ef05 | 388 | asb->s_ftsuffix = 0; |
1da177e4 LT |
389 | |
390 | if (parse_options(sb, data)) | |
391 | goto error; | |
392 | ||
393 | sb_set_blocksize(sb, BLOCK_SIZE); | |
394 | if (!(bh = sb_bread(sb, ADFS_DISCRECORD / BLOCK_SIZE))) { | |
ceb3b106 | 395 | adfs_msg(sb, KERN_ERR, "error: unable to read superblock"); |
b7964106 | 396 | ret = -EIO; |
1da177e4 LT |
397 | goto error; |
398 | } | |
399 | ||
400 | b_data = bh->b_data + (ADFS_DISCRECORD % BLOCK_SIZE); | |
401 | ||
402 | if (adfs_checkbblk(b_data)) { | |
b7964106 | 403 | ret = -EINVAL; |
ceb3b106 | 404 | goto error_badfs; |
1da177e4 LT |
405 | } |
406 | ||
407 | dr = (struct adfs_discrecord *)(b_data + ADFS_DR_OFFSET); | |
408 | ||
409 | /* | |
410 | * Do some sanity checks on the ADFS disc record | |
411 | */ | |
412 | if (adfs_checkdiscrecord(dr)) { | |
b7964106 | 413 | ret = -EINVAL; |
ceb3b106 | 414 | goto error_badfs; |
1da177e4 LT |
415 | } |
416 | ||
417 | brelse(bh); | |
418 | if (sb_set_blocksize(sb, 1 << dr->log2secsize)) { | |
419 | bh = sb_bread(sb, ADFS_DISCRECORD / sb->s_blocksize); | |
420 | if (!bh) { | |
ceb3b106 RK |
421 | adfs_msg(sb, KERN_ERR, |
422 | "error: couldn't read superblock on 2nd try."); | |
b7964106 | 423 | ret = -EIO; |
1da177e4 LT |
424 | goto error; |
425 | } | |
426 | b_data = bh->b_data + (ADFS_DISCRECORD % sb->s_blocksize); | |
427 | if (adfs_checkbblk(b_data)) { | |
ceb3b106 RK |
428 | adfs_msg(sb, KERN_ERR, |
429 | "error: disc record mismatch, very weird!"); | |
b7964106 | 430 | ret = -EINVAL; |
1da177e4 LT |
431 | goto error_free_bh; |
432 | } | |
433 | dr = (struct adfs_discrecord *)(b_data + ADFS_DR_OFFSET); | |
434 | } else { | |
435 | if (!silent) | |
ceb3b106 RK |
436 | adfs_msg(sb, KERN_ERR, |
437 | "error: unsupported blocksize"); | |
b7964106 | 438 | ret = -EINVAL; |
1da177e4 LT |
439 | goto error; |
440 | } | |
441 | ||
442 | /* | |
443 | * blocksize on this device should now be set to the ADFS log2secsize | |
444 | */ | |
445 | ||
446 | sb->s_magic = ADFS_SUPER_MAGIC; | |
447 | asb->s_idlen = dr->idlen; | |
448 | asb->s_map_size = dr->nzones | (dr->nzones_high << 8); | |
449 | asb->s_map2blk = dr->log2bpmb - dr->log2secsize; | |
1da177e4 | 450 | asb->s_log2sharesize = dr->log2sharesize; |
b7964106 | 451 | |
1da177e4 | 452 | asb->s_map = adfs_read_map(sb, dr); |
b7964106 SK |
453 | if (IS_ERR(asb->s_map)) { |
454 | ret = PTR_ERR(asb->s_map); | |
1da177e4 | 455 | goto error_free_bh; |
b7964106 | 456 | } |
1da177e4 LT |
457 | |
458 | brelse(bh); | |
459 | ||
460 | /* | |
461 | * set up enough so that we can read an inode | |
462 | */ | |
463 | sb->s_op = &adfs_sops; | |
464 | ||
1dfdfc94 | 465 | dr = adfs_map_discrecord(asb->s_map); |
1da177e4 | 466 | |
5ed70bb4 | 467 | root_obj.parent_id = root_obj.indaddr = le32_to_cpu(dr->root); |
1da177e4 | 468 | root_obj.name_len = 0; |
da23ef05 SS |
469 | /* Set root object date as 01 Jan 1987 00:00:00 */ |
470 | root_obj.loadaddr = 0xfff0003f; | |
471 | root_obj.execaddr = 0xec22c000; | |
1da177e4 LT |
472 | root_obj.size = ADFS_NEWDIR_SIZE; |
473 | root_obj.attr = ADFS_NDA_DIRECTORY | ADFS_NDA_OWNER_READ | | |
474 | ADFS_NDA_OWNER_WRITE | ADFS_NDA_PUBLIC_READ; | |
da23ef05 | 475 | root_obj.filetype = -1; |
1da177e4 LT |
476 | |
477 | /* | |
478 | * If this is a F+ disk with variable length directories, | |
479 | * get the root_size from the disc record. | |
480 | */ | |
cb88b5a3 | 481 | if (dr->format_version) { |
1da177e4 LT |
482 | root_obj.size = le32_to_cpu(dr->root_size); |
483 | asb->s_dir = &adfs_fplus_dir_ops; | |
484 | asb->s_namelen = ADFS_FPLUS_NAME_LEN; | |
485 | } else { | |
486 | asb->s_dir = &adfs_f_dir_ops; | |
487 | asb->s_namelen = ADFS_F_NAME_LEN; | |
488 | } | |
da23ef05 SS |
489 | /* |
490 | * ,xyz hex filetype suffix may be added by driver | |
491 | * to files that have valid RISC OS filetype | |
492 | */ | |
493 | if (asb->s_ftsuffix) | |
494 | asb->s_namelen += 4; | |
1da177e4 | 495 | |
96e13914 | 496 | sb->s_d_op = &adfs_dentry_operations; |
1da177e4 | 497 | root = adfs_iget(sb, &root_obj); |
48fde701 | 498 | sb->s_root = d_make_root(root); |
1da177e4 LT |
499 | if (!sb->s_root) { |
500 | int i; | |
1da177e4 LT |
501 | for (i = 0; i < asb->s_map_size; i++) |
502 | brelse(asb->s_map[i].dm_bh); | |
503 | kfree(asb->s_map); | |
504 | adfs_error(sb, "get root inode failed\n"); | |
b7964106 | 505 | ret = -EIO; |
1da177e4 | 506 | goto error; |
96e13914 | 507 | } |
1da177e4 LT |
508 | return 0; |
509 | ||
ceb3b106 RK |
510 | error_badfs: |
511 | if (!silent) | |
512 | adfs_msg(sb, KERN_ERR, | |
513 | "error: can't find an ADFS filesystem on dev %s.", | |
514 | sb->s_id); | |
1da177e4 LT |
515 | error_free_bh: |
516 | brelse(bh); | |
517 | error: | |
518 | sb->s_fs_info = NULL; | |
519 | kfree(asb); | |
b7964106 | 520 | return ret; |
1da177e4 LT |
521 | } |
522 | ||
152a0836 AV |
523 | static struct dentry *adfs_mount(struct file_system_type *fs_type, |
524 | int flags, const char *dev_name, void *data) | |
1da177e4 | 525 | { |
152a0836 | 526 | return mount_bdev(fs_type, flags, dev_name, data, adfs_fill_super); |
1da177e4 LT |
527 | } |
528 | ||
529 | static struct file_system_type adfs_fs_type = { | |
530 | .owner = THIS_MODULE, | |
531 | .name = "adfs", | |
152a0836 | 532 | .mount = adfs_mount, |
1da177e4 LT |
533 | .kill_sb = kill_block_super, |
534 | .fs_flags = FS_REQUIRES_DEV, | |
535 | }; | |
7f78e035 | 536 | MODULE_ALIAS_FS("adfs"); |
1da177e4 LT |
537 | |
538 | static int __init init_adfs_fs(void) | |
539 | { | |
540 | int err = init_inodecache(); | |
541 | if (err) | |
542 | goto out1; | |
543 | err = register_filesystem(&adfs_fs_type); | |
544 | if (err) | |
545 | goto out; | |
546 | return 0; | |
547 | out: | |
548 | destroy_inodecache(); | |
549 | out1: | |
550 | return err; | |
551 | } | |
552 | ||
553 | static void __exit exit_adfs_fs(void) | |
554 | { | |
555 | unregister_filesystem(&adfs_fs_type); | |
556 | destroy_inodecache(); | |
557 | } | |
558 | ||
559 | module_init(init_adfs_fs) | |
560 | module_exit(exit_adfs_fs) | |
608ba50b | 561 | MODULE_LICENSE("GPL"); |