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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/befs/linuxvfs.c | |
3 | * | |
4 | * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com | |
5 | * | |
6 | */ | |
7 | ||
dac52fc1 FF |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/slab.h> | |
12 | #include <linux/fs.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/stat.h> | |
15 | #include <linux/nls.h> | |
16 | #include <linux/buffer_head.h> | |
17 | #include <linux/vfs.h> | |
18 | #include <linux/parser.h> | |
19 | #include <linux/namei.h> | |
31aba059 | 20 | #include <linux/sched.h> |
5b825c3a | 21 | #include <linux/cred.h> |
ac632f5b | 22 | #include <linux/exportfs.h> |
1da177e4 LT |
23 | |
24 | #include "befs.h" | |
25 | #include "btree.h" | |
26 | #include "inode.h" | |
27 | #include "datastream.h" | |
28 | #include "super.h" | |
29 | #include "io.h" | |
1da177e4 LT |
30 | |
31 | MODULE_DESCRIPTION("BeOS File System (BeFS) driver"); | |
32 | MODULE_AUTHOR("Will Dyson"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | ||
35 | /* The units the vfs expects inode->i_blocks to be in */ | |
36 | #define VFS_BLOCK_SIZE 512 | |
37 | ||
f0f49ef5 | 38 | static int befs_readdir(struct file *, struct dir_context *); |
1da177e4 LT |
39 | static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int); |
40 | static int befs_readpage(struct file *file, struct page *page); | |
41 | static sector_t befs_bmap(struct address_space *mapping, sector_t block); | |
62b80719 LB |
42 | static struct dentry *befs_lookup(struct inode *, struct dentry *, |
43 | unsigned int); | |
96eb5419 | 44 | static struct inode *befs_iget(struct super_block *, unsigned long); |
1da177e4 LT |
45 | static struct inode *befs_alloc_inode(struct super_block *sb); |
46 | static void befs_destroy_inode(struct inode *inode); | |
1da177e4 | 47 | static void befs_destroy_inodecache(void); |
11803f97 | 48 | static int befs_symlink_readpage(struct file *, struct page *); |
1da177e4 LT |
49 | static int befs_utf2nls(struct super_block *sb, const char *in, int in_len, |
50 | char **out, int *out_len); | |
51 | static int befs_nls2utf(struct super_block *sb, const char *in, int in_len, | |
52 | char **out, int *out_len); | |
53 | static void befs_put_super(struct super_block *); | |
54 | static int befs_remount(struct super_block *, int *, char *); | |
726c3342 | 55 | static int befs_statfs(struct dentry *, struct kstatfs *); |
09ad0eae | 56 | static int parse_options(char *, struct befs_mount_options *); |
ac632f5b LB |
57 | static struct dentry *befs_fh_to_dentry(struct super_block *sb, |
58 | struct fid *fid, int fh_len, int fh_type); | |
59 | static struct dentry *befs_fh_to_parent(struct super_block *sb, | |
60 | struct fid *fid, int fh_len, int fh_type); | |
dcfd9b21 | 61 | static struct dentry *befs_get_parent(struct dentry *child); |
1da177e4 LT |
62 | |
63 | static const struct super_operations befs_sops = { | |
1da177e4 LT |
64 | .alloc_inode = befs_alloc_inode, /* allocate a new inode */ |
65 | .destroy_inode = befs_destroy_inode, /* deallocate an inode */ | |
66 | .put_super = befs_put_super, /* uninit super */ | |
67 | .statfs = befs_statfs, /* statfs */ | |
68 | .remount_fs = befs_remount, | |
552c3c6c | 69 | .show_options = generic_show_options, |
1da177e4 LT |
70 | }; |
71 | ||
72 | /* slab cache for befs_inode_info objects */ | |
e18b890b | 73 | static struct kmem_cache *befs_inode_cachep; |
1da177e4 | 74 | |
4b6f5d20 | 75 | static const struct file_operations befs_dir_operations = { |
1da177e4 | 76 | .read = generic_read_dir, |
e23e9aa7 | 77 | .iterate_shared = befs_readdir, |
59af1584 | 78 | .llseek = generic_file_llseek, |
1da177e4 LT |
79 | }; |
80 | ||
754661f1 | 81 | static const struct inode_operations befs_dir_inode_operations = { |
1da177e4 LT |
82 | .lookup = befs_lookup, |
83 | }; | |
84 | ||
f5e54d6e | 85 | static const struct address_space_operations befs_aops = { |
1da177e4 | 86 | .readpage = befs_readpage, |
1da177e4 LT |
87 | .bmap = befs_bmap, |
88 | }; | |
89 | ||
11803f97 AV |
90 | static const struct address_space_operations befs_symlink_aops = { |
91 | .readpage = befs_symlink_readpage, | |
1da177e4 LT |
92 | }; |
93 | ||
ac632f5b LB |
94 | static const struct export_operations befs_export_operations = { |
95 | .fh_to_dentry = befs_fh_to_dentry, | |
96 | .fh_to_parent = befs_fh_to_parent, | |
dcfd9b21 | 97 | .get_parent = befs_get_parent, |
ac632f5b LB |
98 | }; |
99 | ||
e60f749b | 100 | /* |
1da177e4 | 101 | * Called by generic_file_read() to read a page of data |
e60f749b | 102 | * |
1da177e4 LT |
103 | * In turn, simply calls a generic block read function and |
104 | * passes it the address of befs_get_block, for mapping file | |
105 | * positions to disk blocks. | |
106 | */ | |
107 | static int | |
108 | befs_readpage(struct file *file, struct page *page) | |
109 | { | |
110 | return block_read_full_page(page, befs_get_block); | |
111 | } | |
112 | ||
113 | static sector_t | |
114 | befs_bmap(struct address_space *mapping, sector_t block) | |
115 | { | |
116 | return generic_block_bmap(mapping, block, befs_get_block); | |
117 | } | |
118 | ||
e60f749b LB |
119 | /* |
120 | * Generic function to map a file position (block) to a | |
1da177e4 LT |
121 | * disk offset (passed back in bh_result). |
122 | * | |
123 | * Used by many higher level functions. | |
124 | * | |
125 | * Calls befs_fblock2brun() in datastream.c to do the real work. | |
1da177e4 LT |
126 | */ |
127 | ||
128 | static int | |
129 | befs_get_block(struct inode *inode, sector_t block, | |
130 | struct buffer_head *bh_result, int create) | |
131 | { | |
132 | struct super_block *sb = inode->i_sb; | |
133 | befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; | |
134 | befs_block_run run = BAD_IADDR; | |
abcf9116 | 135 | int res; |
1da177e4 LT |
136 | ulong disk_off; |
137 | ||
138 | befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", | |
dac52fc1 | 139 | (unsigned long)inode->i_ino, (long)block); |
1da177e4 LT |
140 | if (create) { |
141 | befs_error(sb, "befs_get_block() was asked to write to " | |
dac52fc1 FF |
142 | "block %ld in inode %lu", (long)block, |
143 | (unsigned long)inode->i_ino); | |
1da177e4 LT |
144 | return -EPERM; |
145 | } | |
146 | ||
147 | res = befs_fblock2brun(sb, ds, block, &run); | |
148 | if (res != BEFS_OK) { | |
149 | befs_error(sb, | |
dac52fc1 FF |
150 | "<--- %s for inode %lu, block %ld ERROR", |
151 | __func__, (unsigned long)inode->i_ino, | |
152 | (long)block); | |
1da177e4 LT |
153 | return -EFBIG; |
154 | } | |
155 | ||
156 | disk_off = (ulong) iaddr2blockno(sb, &run); | |
157 | ||
158 | map_bh(bh_result, inode->i_sb, disk_off); | |
159 | ||
dac52fc1 FF |
160 | befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu", |
161 | __func__, (unsigned long)inode->i_ino, (long)block, | |
162 | (unsigned long)disk_off); | |
1da177e4 LT |
163 | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static struct dentry * | |
00cd8dd3 | 168 | befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
1da177e4 | 169 | { |
c9408763 | 170 | struct inode *inode; |
1da177e4 | 171 | struct super_block *sb = dir->i_sb; |
22341d8f | 172 | const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; |
1da177e4 LT |
173 | befs_off_t offset; |
174 | int ret; | |
175 | int utfnamelen; | |
176 | char *utfname; | |
177 | const char *name = dentry->d_name.name; | |
178 | ||
a455589f AV |
179 | befs_debug(sb, "---> %s name %pd inode %ld", __func__, |
180 | dentry, dir->i_ino); | |
1da177e4 LT |
181 | |
182 | /* Convert to UTF-8 */ | |
183 | if (BEFS_SB(sb)->nls) { | |
184 | ret = | |
185 | befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); | |
186 | if (ret < 0) { | |
dac52fc1 | 187 | befs_debug(sb, "<--- %s ERROR", __func__); |
1da177e4 LT |
188 | return ERR_PTR(ret); |
189 | } | |
190 | ret = befs_btree_find(sb, ds, utfname, &offset); | |
191 | kfree(utfname); | |
192 | ||
193 | } else { | |
f7769f9c | 194 | ret = befs_btree_find(sb, ds, name, &offset); |
1da177e4 LT |
195 | } |
196 | ||
197 | if (ret == BEFS_BT_NOT_FOUND) { | |
a455589f | 198 | befs_debug(sb, "<--- %s %pd not found", __func__, dentry); |
a26bc1ad | 199 | d_add(dentry, NULL); |
1da177e4 LT |
200 | return ERR_PTR(-ENOENT); |
201 | ||
202 | } else if (ret != BEFS_OK || offset == 0) { | |
4c3897cc | 203 | befs_error(sb, "<--- %s Error", __func__); |
1da177e4 LT |
204 | return ERR_PTR(-ENODATA); |
205 | } | |
206 | ||
96eb5419 DH |
207 | inode = befs_iget(dir->i_sb, (ino_t) offset); |
208 | if (IS_ERR(inode)) | |
209 | return ERR_CAST(inode); | |
1da177e4 LT |
210 | |
211 | d_add(dentry, inode); | |
212 | ||
dac52fc1 | 213 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
214 | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | static int | |
f0f49ef5 | 219 | befs_readdir(struct file *file, struct dir_context *ctx) |
1da177e4 | 220 | { |
f0f49ef5 | 221 | struct inode *inode = file_inode(file); |
1da177e4 | 222 | struct super_block *sb = inode->i_sb; |
22341d8f | 223 | const befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; |
1da177e4 LT |
224 | befs_off_t value; |
225 | int result; | |
226 | size_t keysize; | |
1da177e4 | 227 | char keybuf[BEFS_NAME_LEN + 1]; |
1da177e4 | 228 | |
a455589f AV |
229 | befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld", |
230 | __func__, file, inode->i_ino, ctx->pos); | |
1da177e4 | 231 | |
9ae51a32 LB |
232 | while (1) { |
233 | result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1, | |
234 | keybuf, &keysize, &value); | |
1da177e4 | 235 | |
9ae51a32 | 236 | if (result == BEFS_ERR) { |
dac52fc1 | 237 | befs_debug(sb, "<--- %s ERROR", __func__); |
9ae51a32 LB |
238 | befs_error(sb, "IO error reading %pD (inode %lu)", |
239 | file, inode->i_ino); | |
240 | return -EIO; | |
1da177e4 | 241 | |
9ae51a32 LB |
242 | } else if (result == BEFS_BT_END) { |
243 | befs_debug(sb, "<--- %s END", __func__); | |
244 | return 0; | |
1da177e4 | 245 | |
9ae51a32 LB |
246 | } else if (result == BEFS_BT_EMPTY) { |
247 | befs_debug(sb, "<--- %s Empty directory", __func__); | |
248 | return 0; | |
1da177e4 | 249 | } |
9ae51a32 LB |
250 | |
251 | /* Convert to NLS */ | |
252 | if (BEFS_SB(sb)->nls) { | |
253 | char *nlsname; | |
254 | int nlsnamelen; | |
255 | ||
256 | result = | |
257 | befs_utf2nls(sb, keybuf, keysize, &nlsname, | |
258 | &nlsnamelen); | |
259 | if (result < 0) { | |
260 | befs_debug(sb, "<--- %s ERROR", __func__); | |
261 | return result; | |
262 | } | |
263 | if (!dir_emit(ctx, nlsname, nlsnamelen, | |
264 | (ino_t) value, DT_UNKNOWN)) { | |
265 | kfree(nlsname); | |
266 | return 0; | |
267 | } | |
f0f49ef5 | 268 | kfree(nlsname); |
9ae51a32 LB |
269 | } else { |
270 | if (!dir_emit(ctx, keybuf, keysize, | |
271 | (ino_t) value, DT_UNKNOWN)) | |
272 | return 0; | |
f0f49ef5 | 273 | } |
9ae51a32 | 274 | ctx->pos++; |
1da177e4 | 275 | } |
1da177e4 LT |
276 | } |
277 | ||
278 | static struct inode * | |
279 | befs_alloc_inode(struct super_block *sb) | |
280 | { | |
111d639d FF |
281 | struct befs_inode_info *bi; |
282 | ||
283 | bi = kmem_cache_alloc(befs_inode_cachep, GFP_KERNEL); | |
62b80719 LB |
284 | if (!bi) |
285 | return NULL; | |
286 | return &bi->vfs_inode; | |
1da177e4 LT |
287 | } |
288 | ||
fa0d7e3d | 289 | static void befs_i_callback(struct rcu_head *head) |
1da177e4 | 290 | { |
fa0d7e3d | 291 | struct inode *inode = container_of(head, struct inode, i_rcu); |
62b80719 | 292 | kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); |
1da177e4 LT |
293 | } |
294 | ||
fa0d7e3d NP |
295 | static void befs_destroy_inode(struct inode *inode) |
296 | { | |
297 | call_rcu(&inode->i_rcu, befs_i_callback); | |
298 | } | |
299 | ||
51cc5068 | 300 | static void init_once(void *foo) |
1da177e4 | 301 | { |
62b80719 | 302 | struct befs_inode_info *bi = (struct befs_inode_info *) foo; |
a35afb83 CL |
303 | |
304 | inode_init_once(&bi->vfs_inode); | |
1da177e4 LT |
305 | } |
306 | ||
96eb5419 | 307 | static struct inode *befs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 308 | { |
e4c7f5b1 | 309 | struct buffer_head *bh; |
44ad8098 | 310 | befs_inode *raw_inode; |
038428fc | 311 | struct befs_sb_info *befs_sb = BEFS_SB(sb); |
d6e02033 | 312 | struct befs_inode_info *befs_ino; |
96eb5419 | 313 | struct inode *inode; |
1da177e4 | 314 | |
dac52fc1 | 315 | befs_debug(sb, "---> %s inode = %lu", __func__, ino); |
96eb5419 DH |
316 | |
317 | inode = iget_locked(sb, ino); | |
ac34a1b3 RP |
318 | if (!inode) |
319 | return ERR_PTR(-ENOMEM); | |
96eb5419 DH |
320 | if (!(inode->i_state & I_NEW)) |
321 | return inode; | |
1da177e4 LT |
322 | |
323 | befs_ino = BEFS_I(inode); | |
324 | ||
325 | /* convert from vfs's inode number to befs's inode number */ | |
326 | befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino); | |
327 | ||
328 | befs_debug(sb, " real inode number [%u, %hu, %hu]", | |
329 | befs_ino->i_inode_num.allocation_group, | |
330 | befs_ino->i_inode_num.start, befs_ino->i_inode_num.len); | |
331 | ||
f7f67540 | 332 | bh = sb_bread(sb, inode->i_ino); |
1da177e4 LT |
333 | if (!bh) { |
334 | befs_error(sb, "unable to read inode block - " | |
335 | "inode = %lu", inode->i_ino); | |
0418726b | 336 | goto unacquire_none; |
1da177e4 LT |
337 | } |
338 | ||
339 | raw_inode = (befs_inode *) bh->b_data; | |
340 | ||
341 | befs_dump_inode(sb, raw_inode); | |
342 | ||
343 | if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) { | |
344 | befs_error(sb, "Bad inode: %lu", inode->i_ino); | |
0418726b | 345 | goto unacquire_bh; |
1da177e4 LT |
346 | } |
347 | ||
348 | inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode); | |
349 | ||
350 | /* | |
351 | * set uid and gid. But since current BeOS is single user OS, so | |
352 | * you can change by "uid" or "gid" options. | |
e60f749b | 353 | */ |
1da177e4 LT |
354 | |
355 | inode->i_uid = befs_sb->mount_opts.use_uid ? | |
31aba059 EB |
356 | befs_sb->mount_opts.uid : |
357 | make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid)); | |
1da177e4 | 358 | inode->i_gid = befs_sb->mount_opts.use_gid ? |
31aba059 EB |
359 | befs_sb->mount_opts.gid : |
360 | make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid)); | |
1da177e4 | 361 | |
bfe86848 | 362 | set_nlink(inode, 1); |
1da177e4 LT |
363 | |
364 | /* | |
365 | * BEFS's time is 64 bits, but current VFS is 32 bits... | |
366 | * BEFS don't have access time. Nor inode change time. VFS | |
367 | * doesn't have creation time. | |
e60f749b | 368 | * Also, the lower 16 bits of the last_modified_time and |
1da177e4 LT |
369 | * create_time are just a counter to help ensure uniqueness |
370 | * for indexing purposes. (PFD, page 54) | |
371 | */ | |
372 | ||
373 | inode->i_mtime.tv_sec = | |
374 | fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16; | |
e60f749b | 375 | inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */ |
1da177e4 LT |
376 | inode->i_ctime = inode->i_mtime; |
377 | inode->i_atime = inode->i_mtime; | |
1da177e4 LT |
378 | |
379 | befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num); | |
380 | befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent); | |
381 | befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes); | |
382 | befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags); | |
383 | ||
384 | if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){ | |
385 | inode->i_size = 0; | |
386 | inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE; | |
39d7a29f FF |
387 | strlcpy(befs_ino->i_data.symlink, raw_inode->data.symlink, |
388 | BEFS_SYMLINK_LEN); | |
1da177e4 LT |
389 | } else { |
390 | int num_blks; | |
391 | ||
392 | befs_ino->i_data.ds = | |
e0e3d32b | 393 | fsds_to_cpu(sb, &raw_inode->data.datastream); |
1da177e4 LT |
394 | |
395 | num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); | |
396 | inode->i_blocks = | |
397 | num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE); | |
398 | inode->i_size = befs_ino->i_data.ds.size; | |
399 | } | |
400 | ||
401 | inode->i_mapping->a_ops = &befs_aops; | |
402 | ||
403 | if (S_ISREG(inode->i_mode)) { | |
2cf06916 | 404 | inode->i_fop = &generic_ro_fops; |
1da177e4 LT |
405 | } else if (S_ISDIR(inode->i_mode)) { |
406 | inode->i_op = &befs_dir_inode_operations; | |
407 | inode->i_fop = &befs_dir_operations; | |
408 | } else if (S_ISLNK(inode->i_mode)) { | |
d0deec19 | 409 | if (befs_ino->i_flags & BEFS_LONG_SYMLINK) { |
11803f97 | 410 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 411 | inode_nohighmem(inode); |
11803f97 | 412 | inode->i_mapping->a_ops = &befs_symlink_aops; |
d0deec19 AV |
413 | } else { |
414 | inode->i_link = befs_ino->i_data.symlink; | |
415 | inode->i_op = &simple_symlink_inode_operations; | |
416 | } | |
1da177e4 LT |
417 | } else { |
418 | befs_error(sb, "Inode %lu is not a regular file, " | |
419 | "directory or symlink. THAT IS WRONG! BeFS has no " | |
420 | "on disk special files", inode->i_ino); | |
0418726b | 421 | goto unacquire_bh; |
1da177e4 LT |
422 | } |
423 | ||
424 | brelse(bh); | |
dac52fc1 | 425 | befs_debug(sb, "<--- %s", __func__); |
96eb5419 DH |
426 | unlock_new_inode(inode); |
427 | return inode; | |
1da177e4 | 428 | |
62b80719 | 429 | unacquire_bh: |
1da177e4 LT |
430 | brelse(bh); |
431 | ||
62b80719 | 432 | unacquire_none: |
96eb5419 | 433 | iget_failed(inode); |
dac52fc1 | 434 | befs_debug(sb, "<--- %s - Bad inode", __func__); |
33c712b4 | 435 | return ERR_PTR(-EIO); |
1da177e4 LT |
436 | } |
437 | ||
438 | /* Initialize the inode cache. Called at fs setup. | |
20c2df83 | 439 | * |
1da177e4 LT |
440 | * Taken from NFS implementation by Al Viro. |
441 | */ | |
91a52ab7 | 442 | static int __init |
1da177e4 LT |
443 | befs_init_inodecache(void) |
444 | { | |
445 | befs_inode_cachep = kmem_cache_create("befs_inode_cache", | |
446 | sizeof (struct befs_inode_info), | |
fffb60f9 | 447 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 448 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 449 | init_once); |
c08f1cb6 | 450 | if (befs_inode_cachep == NULL) |
1da177e4 | 451 | return -ENOMEM; |
c08f1cb6 | 452 | |
1da177e4 LT |
453 | return 0; |
454 | } | |
455 | ||
456 | /* Called at fs teardown. | |
e60f749b | 457 | * |
1da177e4 LT |
458 | * Taken from NFS implementation by Al Viro. |
459 | */ | |
460 | static void | |
461 | befs_destroy_inodecache(void) | |
462 | { | |
8c0a8537 KS |
463 | /* |
464 | * Make sure all delayed rcu free inodes are flushed before we | |
465 | * destroy cache. | |
466 | */ | |
467 | rcu_barrier(); | |
1a1d92c1 | 468 | kmem_cache_destroy(befs_inode_cachep); |
1da177e4 LT |
469 | } |
470 | ||
471 | /* | |
472 | * The inode of symbolic link is different to data stream. | |
473 | * The data stream become link name. Unless the LONG_SYMLINK | |
474 | * flag is set. | |
475 | */ | |
11803f97 | 476 | static int befs_symlink_readpage(struct file *unused, struct page *page) |
1da177e4 | 477 | { |
11803f97 AV |
478 | struct inode *inode = page->mapping->host; |
479 | struct super_block *sb = inode->i_sb; | |
480 | struct befs_inode_info *befs_ino = BEFS_I(inode); | |
48bc06e7 AV |
481 | befs_data_stream *data = &befs_ino->i_data.ds; |
482 | befs_off_t len = data->size; | |
21fc61c7 | 483 | char *link = page_address(page); |
1da177e4 | 484 | |
11803f97 | 485 | if (len == 0 || len > PAGE_SIZE) { |
48bc06e7 | 486 | befs_error(sb, "Long symlink with illegal length"); |
11803f97 | 487 | goto fail; |
1da177e4 | 488 | } |
680baacb AV |
489 | befs_debug(sb, "Follow long symlink"); |
490 | ||
680baacb | 491 | if (befs_read_lsymlink(sb, data, link, len) != len) { |
680baacb | 492 | befs_error(sb, "Failed to read entire long symlink"); |
11803f97 | 493 | goto fail; |
680baacb AV |
494 | } |
495 | link[len - 1] = '\0'; | |
11803f97 | 496 | SetPageUptodate(page); |
11803f97 AV |
497 | unlock_page(page); |
498 | return 0; | |
499 | fail: | |
500 | SetPageError(page); | |
11803f97 AV |
501 | unlock_page(page); |
502 | return -EIO; | |
1da177e4 LT |
503 | } |
504 | ||
1da177e4 | 505 | /* |
1ca7087e | 506 | * UTF-8 to NLS charset convert routine |
e60f749b | 507 | * |
1ca7087e | 508 | * Uses uni2char() / char2uni() rather than the nls tables directly |
1da177e4 | 509 | */ |
1da177e4 LT |
510 | static int |
511 | befs_utf2nls(struct super_block *sb, const char *in, | |
512 | int in_len, char **out, int *out_len) | |
513 | { | |
514 | struct nls_table *nls = BEFS_SB(sb)->nls; | |
515 | int i, o; | |
74675a58 | 516 | unicode_t uni; |
1da177e4 LT |
517 | int unilen, utflen; |
518 | char *result; | |
94f563c4 DC |
519 | /* The utf8->nls conversion won't make the final nls string bigger |
520 | * than the utf one, but if the string is pure ascii they'll have the | |
521 | * same width and an extra char is needed to save the additional \0 | |
522 | */ | |
523 | int maxlen = in_len + 1; | |
1da177e4 | 524 | |
dac52fc1 | 525 | befs_debug(sb, "---> %s", __func__); |
1da177e4 LT |
526 | |
527 | if (!nls) { | |
dac52fc1 | 528 | befs_error(sb, "%s called with no NLS table loaded", __func__); |
1da177e4 LT |
529 | return -EINVAL; |
530 | } | |
531 | ||
532 | *out = result = kmalloc(maxlen, GFP_NOFS); | |
62b80719 | 533 | if (!*out) |
1da177e4 | 534 | return -ENOMEM; |
1da177e4 LT |
535 | |
536 | for (i = o = 0; i < in_len; i += utflen, o += unilen) { | |
537 | ||
538 | /* convert from UTF-8 to Unicode */ | |
74675a58 AS |
539 | utflen = utf8_to_utf32(&in[i], in_len - i, &uni); |
540 | if (utflen < 0) | |
1da177e4 | 541 | goto conv_err; |
1da177e4 LT |
542 | |
543 | /* convert from Unicode to nls */ | |
74675a58 AS |
544 | if (uni > MAX_WCHAR_T) |
545 | goto conv_err; | |
1da177e4 | 546 | unilen = nls->uni2char(uni, &result[o], in_len - o); |
74675a58 | 547 | if (unilen < 0) |
1da177e4 | 548 | goto conv_err; |
1da177e4 LT |
549 | } |
550 | result[o] = '\0'; | |
551 | *out_len = o; | |
552 | ||
dac52fc1 | 553 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
554 | |
555 | return o; | |
556 | ||
62b80719 | 557 | conv_err: |
1da177e4 LT |
558 | befs_error(sb, "Name using character set %s contains a character that " |
559 | "cannot be converted to unicode.", nls->charset); | |
dac52fc1 | 560 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
561 | kfree(result); |
562 | return -EILSEQ; | |
563 | } | |
564 | ||
565 | /** | |
566 | * befs_nls2utf - Convert NLS string to utf8 encodeing | |
567 | * @sb: Superblock | |
817e1d90 FF |
568 | * @in: Input string buffer in NLS format |
569 | * @in_len: Length of input string in bytes | |
570 | * @out: The output string in UTF-8 format | |
571 | * @out_len: Length of the output buffer | |
e60f749b | 572 | * |
817e1d90 | 573 | * Converts input string @in, which is in the format of the loaded NLS map, |
1da177e4 | 574 | * into a utf8 string. |
e60f749b | 575 | * |
817e1d90 | 576 | * The destination string @out is allocated by this function and the caller is |
1da177e4 | 577 | * responsible for freeing it with kfree() |
e60f749b | 578 | * |
817e1d90 | 579 | * On return, *@out_len is the length of @out in bytes. |
1da177e4 LT |
580 | * |
581 | * On success, the return value is the number of utf8 characters written to | |
817e1d90 | 582 | * the output buffer @out. |
e60f749b | 583 | * |
1da177e4 LT |
584 | * On Failure, a negative number coresponding to the error code is returned. |
585 | */ | |
586 | ||
587 | static int | |
588 | befs_nls2utf(struct super_block *sb, const char *in, | |
589 | int in_len, char **out, int *out_len) | |
590 | { | |
591 | struct nls_table *nls = BEFS_SB(sb)->nls; | |
592 | int i, o; | |
593 | wchar_t uni; | |
594 | int unilen, utflen; | |
595 | char *result; | |
1ca7087e LB |
596 | /* |
597 | * There are nls characters that will translate to 3-chars-wide UTF-8 | |
598 | * characters, an additional byte is needed to save the final \0 | |
62b80719 LB |
599 | * in special cases |
600 | */ | |
94f563c4 | 601 | int maxlen = (3 * in_len) + 1; |
1da177e4 | 602 | |
dac52fc1 | 603 | befs_debug(sb, "---> %s\n", __func__); |
1da177e4 LT |
604 | |
605 | if (!nls) { | |
dac52fc1 FF |
606 | befs_error(sb, "%s called with no NLS table loaded.", |
607 | __func__); | |
1da177e4 LT |
608 | return -EINVAL; |
609 | } | |
610 | ||
611 | *out = result = kmalloc(maxlen, GFP_NOFS); | |
612 | if (!*out) { | |
1da177e4 LT |
613 | *out_len = 0; |
614 | return -ENOMEM; | |
615 | } | |
616 | ||
617 | for (i = o = 0; i < in_len; i += unilen, o += utflen) { | |
618 | ||
619 | /* convert from nls to unicode */ | |
620 | unilen = nls->char2uni(&in[i], in_len - i, &uni); | |
74675a58 | 621 | if (unilen < 0) |
1da177e4 | 622 | goto conv_err; |
1da177e4 LT |
623 | |
624 | /* convert from unicode to UTF-8 */ | |
74675a58 AS |
625 | utflen = utf32_to_utf8(uni, &result[o], 3); |
626 | if (utflen <= 0) | |
1da177e4 | 627 | goto conv_err; |
1da177e4 LT |
628 | } |
629 | ||
630 | result[o] = '\0'; | |
631 | *out_len = o; | |
632 | ||
dac52fc1 | 633 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
634 | |
635 | return i; | |
636 | ||
62b80719 | 637 | conv_err: |
1ca7087e | 638 | befs_error(sb, "Name using character set %s contains a character that " |
1da177e4 | 639 | "cannot be converted to unicode.", nls->charset); |
dac52fc1 | 640 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
641 | kfree(result); |
642 | return -EILSEQ; | |
643 | } | |
644 | ||
ac632f5b LB |
645 | static struct inode *befs_nfs_get_inode(struct super_block *sb, uint64_t ino, |
646 | uint32_t generation) | |
647 | { | |
648 | /* No need to handle i_generation */ | |
649 | return befs_iget(sb, ino); | |
650 | } | |
651 | ||
652 | /* | |
653 | * Map a NFS file handle to a corresponding dentry | |
654 | */ | |
655 | static struct dentry *befs_fh_to_dentry(struct super_block *sb, | |
656 | struct fid *fid, int fh_len, int fh_type) | |
657 | { | |
658 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
659 | befs_nfs_get_inode); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Find the parent for a file specified by NFS handle | |
664 | */ | |
665 | static struct dentry *befs_fh_to_parent(struct super_block *sb, | |
666 | struct fid *fid, int fh_len, int fh_type) | |
667 | { | |
668 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
669 | befs_nfs_get_inode); | |
670 | } | |
671 | ||
dcfd9b21 FF |
672 | static struct dentry *befs_get_parent(struct dentry *child) |
673 | { | |
674 | struct inode *parent; | |
675 | struct befs_inode_info *befs_ino = BEFS_I(d_inode(child)); | |
676 | ||
677 | parent = befs_iget(child->d_sb, | |
678 | (unsigned long)befs_ino->i_parent.start); | |
679 | if (IS_ERR(parent)) | |
680 | return ERR_CAST(parent); | |
681 | ||
682 | return d_obtain_alias(parent); | |
683 | } | |
684 | ||
1da177e4 LT |
685 | enum { |
686 | Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err, | |
687 | }; | |
688 | ||
a447c093 | 689 | static const match_table_t befs_tokens = { |
1da177e4 LT |
690 | {Opt_uid, "uid=%d"}, |
691 | {Opt_gid, "gid=%d"}, | |
692 | {Opt_charset, "iocharset=%s"}, | |
693 | {Opt_debug, "debug"}, | |
694 | {Opt_err, NULL} | |
695 | }; | |
696 | ||
697 | static int | |
09ad0eae | 698 | parse_options(char *options, struct befs_mount_options *opts) |
1da177e4 LT |
699 | { |
700 | char *p; | |
701 | substring_t args[MAX_OPT_ARGS]; | |
702 | int option; | |
31aba059 EB |
703 | kuid_t uid; |
704 | kgid_t gid; | |
1da177e4 LT |
705 | |
706 | /* Initialize options */ | |
31aba059 EB |
707 | opts->uid = GLOBAL_ROOT_UID; |
708 | opts->gid = GLOBAL_ROOT_GID; | |
1da177e4 LT |
709 | opts->use_uid = 0; |
710 | opts->use_gid = 0; | |
711 | opts->iocharset = NULL; | |
712 | opts->debug = 0; | |
713 | ||
714 | if (!options) | |
715 | return 1; | |
716 | ||
717 | while ((p = strsep(&options, ",")) != NULL) { | |
718 | int token; | |
62b80719 | 719 | |
1da177e4 LT |
720 | if (!*p) |
721 | continue; | |
722 | ||
723 | token = match_token(p, befs_tokens, args); | |
724 | switch (token) { | |
725 | case Opt_uid: | |
726 | if (match_int(&args[0], &option)) | |
727 | return 0; | |
31aba059 EB |
728 | uid = INVALID_UID; |
729 | if (option >= 0) | |
730 | uid = make_kuid(current_user_ns(), option); | |
731 | if (!uid_valid(uid)) { | |
dac52fc1 FF |
732 | pr_err("Invalid uid %d, " |
733 | "using default\n", option); | |
1da177e4 LT |
734 | break; |
735 | } | |
31aba059 | 736 | opts->uid = uid; |
1da177e4 LT |
737 | opts->use_uid = 1; |
738 | break; | |
739 | case Opt_gid: | |
740 | if (match_int(&args[0], &option)) | |
741 | return 0; | |
31aba059 EB |
742 | gid = INVALID_GID; |
743 | if (option >= 0) | |
744 | gid = make_kgid(current_user_ns(), option); | |
745 | if (!gid_valid(gid)) { | |
dac52fc1 FF |
746 | pr_err("Invalid gid %d, " |
747 | "using default\n", option); | |
1da177e4 LT |
748 | break; |
749 | } | |
31aba059 | 750 | opts->gid = gid; |
1da177e4 LT |
751 | opts->use_gid = 1; |
752 | break; | |
753 | case Opt_charset: | |
754 | kfree(opts->iocharset); | |
755 | opts->iocharset = match_strdup(&args[0]); | |
756 | if (!opts->iocharset) { | |
dac52fc1 FF |
757 | pr_err("allocation failure for " |
758 | "iocharset string\n"); | |
1da177e4 LT |
759 | return 0; |
760 | } | |
761 | break; | |
762 | case Opt_debug: | |
763 | opts->debug = 1; | |
764 | break; | |
765 | default: | |
dac52fc1 FF |
766 | pr_err("Unrecognized mount option \"%s\" " |
767 | "or missing value\n", p); | |
1da177e4 LT |
768 | return 0; |
769 | } | |
770 | } | |
771 | return 1; | |
772 | } | |
773 | ||
774 | /* This function has the responsibiltiy of getting the | |
e60f749b | 775 | * filesystem ready for unmounting. |
25985edc | 776 | * Basically, we free everything that we allocated in |
1da177e4 LT |
777 | * befs_read_inode |
778 | */ | |
779 | static void | |
780 | befs_put_super(struct super_block *sb) | |
781 | { | |
f99d49ad JJ |
782 | kfree(BEFS_SB(sb)->mount_opts.iocharset); |
783 | BEFS_SB(sb)->mount_opts.iocharset = NULL; | |
6d729e44 | 784 | unload_nls(BEFS_SB(sb)->nls); |
f99d49ad JJ |
785 | kfree(sb->s_fs_info); |
786 | sb->s_fs_info = NULL; | |
1da177e4 LT |
787 | } |
788 | ||
789 | /* Allocate private field of the superblock, fill it. | |
790 | * | |
791 | * Finish filling the public superblock fields | |
792 | * Make the root directory | |
793 | * Load a set of NLS translations if needed. | |
794 | */ | |
795 | static int | |
796 | befs_fill_super(struct super_block *sb, void *data, int silent) | |
797 | { | |
798 | struct buffer_head *bh; | |
038428fc | 799 | struct befs_sb_info *befs_sb; |
1da177e4 LT |
800 | befs_super_block *disk_sb; |
801 | struct inode *root; | |
96eb5419 | 802 | long ret = -EINVAL; |
1da177e4 LT |
803 | const unsigned long sb_block = 0; |
804 | const off_t x86_sb_off = 512; | |
173b066f | 805 | int blocksize; |
1da177e4 | 806 | |
552c3c6c MS |
807 | save_mount_options(sb, data); |
808 | ||
2d4319ef | 809 | sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL); |
c625426f | 810 | if (sb->s_fs_info == NULL) |
0418726b | 811 | goto unacquire_none; |
c625426f | 812 | |
1da177e4 | 813 | befs_sb = BEFS_SB(sb); |
1da177e4 LT |
814 | |
815 | if (!parse_options((char *) data, &befs_sb->mount_opts)) { | |
dceee2e2 ST |
816 | if (!silent) |
817 | befs_error(sb, "cannot parse mount options"); | |
0418726b | 818 | goto unacquire_priv_sbp; |
1da177e4 LT |
819 | } |
820 | ||
dac52fc1 | 821 | befs_debug(sb, "---> %s", __func__); |
1da177e4 | 822 | |
1da177e4 LT |
823 | if (!(sb->s_flags & MS_RDONLY)) { |
824 | befs_warning(sb, | |
825 | "No write support. Marking filesystem read-only"); | |
826 | sb->s_flags |= MS_RDONLY; | |
827 | } | |
1da177e4 LT |
828 | |
829 | /* | |
830 | * Set dummy blocksize to read super block. | |
831 | * Will be set to real fs blocksize later. | |
832 | * | |
833 | * Linux 2.4.10 and later refuse to read blocks smaller than | |
a441b0d0 | 834 | * the logical block size for the device. But we also need to read at |
1da177e4 | 835 | * least 1k to get the second 512 bytes of the volume. |
e60f749b | 836 | */ |
173b066f LB |
837 | blocksize = sb_min_blocksize(sb, 1024); |
838 | if (!blocksize) { | |
a6499850 LB |
839 | if (!silent) |
840 | befs_error(sb, "unable to set blocksize"); | |
173b066f LB |
841 | goto unacquire_priv_sbp; |
842 | } | |
1da177e4 | 843 | |
62b80719 LB |
844 | bh = sb_bread(sb, sb_block); |
845 | if (!bh) { | |
dceee2e2 ST |
846 | if (!silent) |
847 | befs_error(sb, "unable to read superblock"); | |
0418726b | 848 | goto unacquire_priv_sbp; |
1da177e4 LT |
849 | } |
850 | ||
851 | /* account for offset of super block on x86 */ | |
852 | disk_sb = (befs_super_block *) bh->b_data; | |
152b95a1 HH |
853 | if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) || |
854 | (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) { | |
1da177e4 LT |
855 | befs_debug(sb, "Using PPC superblock location"); |
856 | } else { | |
857 | befs_debug(sb, "Using x86 superblock location"); | |
858 | disk_sb = | |
859 | (befs_super_block *) ((void *) bh->b_data + x86_sb_off); | |
860 | } | |
861 | ||
8e19189e FF |
862 | if ((befs_load_sb(sb, disk_sb) != BEFS_OK) || |
863 | (befs_check_sb(sb) != BEFS_OK)) | |
0418726b | 864 | goto unacquire_bh; |
1da177e4 LT |
865 | |
866 | befs_dump_super_block(sb, disk_sb); | |
867 | ||
868 | brelse(bh); | |
869 | ||
62b80719 | 870 | if (befs_sb->num_blocks > ~((sector_t)0)) { |
dceee2e2 ST |
871 | if (!silent) |
872 | befs_error(sb, "blocks count: %llu is larger than the host can use", | |
873 | befs_sb->num_blocks); | |
0418726b | 874 | goto unacquire_priv_sbp; |
1da177e4 LT |
875 | } |
876 | ||
877 | /* | |
878 | * set up enough so that it can read an inode | |
879 | * Fill in kernel superblock fields from private sb | |
880 | */ | |
881 | sb->s_magic = BEFS_SUPER_MAGIC; | |
882 | /* Set real blocksize of fs */ | |
883 | sb_set_blocksize(sb, (ulong) befs_sb->block_size); | |
b87221de | 884 | sb->s_op = &befs_sops; |
ac632f5b | 885 | sb->s_export_op = &befs_export_operations; |
96eb5419 DH |
886 | root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir))); |
887 | if (IS_ERR(root)) { | |
888 | ret = PTR_ERR(root); | |
889 | goto unacquire_priv_sbp; | |
890 | } | |
48fde701 | 891 | sb->s_root = d_make_root(root); |
1da177e4 | 892 | if (!sb->s_root) { |
dceee2e2 ST |
893 | if (!silent) |
894 | befs_error(sb, "get root inode failed"); | |
0418726b | 895 | goto unacquire_priv_sbp; |
1da177e4 LT |
896 | } |
897 | ||
898 | /* load nls library */ | |
899 | if (befs_sb->mount_opts.iocharset) { | |
900 | befs_debug(sb, "Loading nls: %s", | |
901 | befs_sb->mount_opts.iocharset); | |
902 | befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset); | |
903 | if (!befs_sb->nls) { | |
904 | befs_warning(sb, "Cannot load nls %s" | |
905 | " loading default nls", | |
906 | befs_sb->mount_opts.iocharset); | |
907 | befs_sb->nls = load_nls_default(); | |
908 | } | |
909 | /* load default nls if none is specified in mount options */ | |
910 | } else { | |
911 | befs_debug(sb, "Loading default nls"); | |
912 | befs_sb->nls = load_nls_default(); | |
913 | } | |
914 | ||
915 | return 0; | |
62b80719 LB |
916 | |
917 | unacquire_bh: | |
1da177e4 LT |
918 | brelse(bh); |
919 | ||
62b80719 | 920 | unacquire_priv_sbp: |
8dd5ca53 | 921 | kfree(befs_sb->mount_opts.iocharset); |
1da177e4 | 922 | kfree(sb->s_fs_info); |
30982583 | 923 | sb->s_fs_info = NULL; |
1da177e4 | 924 | |
62b80719 | 925 | unacquire_none: |
96eb5419 | 926 | return ret; |
1da177e4 LT |
927 | } |
928 | ||
929 | static int | |
930 | befs_remount(struct super_block *sb, int *flags, char *data) | |
931 | { | |
02b9984d | 932 | sync_filesystem(sb); |
1da177e4 LT |
933 | if (!(*flags & MS_RDONLY)) |
934 | return -EINVAL; | |
935 | return 0; | |
936 | } | |
937 | ||
938 | static int | |
726c3342 | 939 | befs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 940 | { |
726c3342 | 941 | struct super_block *sb = dentry->d_sb; |
8587246a | 942 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4 | 943 | |
dac52fc1 | 944 | befs_debug(sb, "---> %s", __func__); |
1da177e4 LT |
945 | |
946 | buf->f_type = BEFS_SUPER_MAGIC; | |
947 | buf->f_bsize = sb->s_blocksize; | |
948 | buf->f_blocks = BEFS_SB(sb)->num_blocks; | |
949 | buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks; | |
950 | buf->f_bavail = buf->f_bfree; | |
951 | buf->f_files = 0; /* UNKNOWN */ | |
952 | buf->f_ffree = 0; /* UNKNOWN */ | |
8587246a CL |
953 | buf->f_fsid.val[0] = (u32)id; |
954 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
955 | buf->f_namelen = BEFS_NAME_LEN; |
956 | ||
dac52fc1 | 957 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
958 | |
959 | return 0; | |
960 | } | |
961 | ||
152a0836 AV |
962 | static struct dentry * |
963 | befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, | |
964 | void *data) | |
1da177e4 | 965 | { |
152a0836 | 966 | return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super); |
1da177e4 LT |
967 | } |
968 | ||
969 | static struct file_system_type befs_fs_type = { | |
970 | .owner = THIS_MODULE, | |
971 | .name = "befs", | |
152a0836 | 972 | .mount = befs_mount, |
1da177e4 | 973 | .kill_sb = kill_block_super, |
e60f749b | 974 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 | 975 | }; |
7f78e035 | 976 | MODULE_ALIAS_FS("befs"); |
1da177e4 LT |
977 | |
978 | static int __init | |
979 | init_befs_fs(void) | |
980 | { | |
981 | int err; | |
982 | ||
dac52fc1 | 983 | pr_info("version: %s\n", BEFS_VERSION); |
1da177e4 LT |
984 | |
985 | err = befs_init_inodecache(); | |
986 | if (err) | |
0418726b | 987 | goto unacquire_none; |
1da177e4 LT |
988 | |
989 | err = register_filesystem(&befs_fs_type); | |
990 | if (err) | |
0418726b | 991 | goto unacquire_inodecache; |
1da177e4 LT |
992 | |
993 | return 0; | |
994 | ||
0418726b | 995 | unacquire_inodecache: |
1da177e4 LT |
996 | befs_destroy_inodecache(); |
997 | ||
0418726b | 998 | unacquire_none: |
1da177e4 LT |
999 | return err; |
1000 | } | |
1001 | ||
1002 | static void __exit | |
1003 | exit_befs_fs(void) | |
1004 | { | |
1005 | befs_destroy_inodecache(); | |
1006 | ||
1007 | unregister_filesystem(&befs_fs_type); | |
1008 | } | |
1009 | ||
1010 | /* | |
62b80719 LB |
1011 | * Macros that typecheck the init and exit functions, |
1012 | * ensures that they are called at init and cleanup, | |
1013 | * and eliminates warnings about unused functions. | |
1014 | */ | |
1da177e4 LT |
1015 | module_init(init_befs_fs) |
1016 | module_exit(exit_befs_fs) |