Commit | Line | Data |
---|---|---|
09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/fs/befs/linuxvfs.c | |
4 | * | |
5 | * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com | |
6 | * | |
7 | */ | |
8 | ||
dac52fc1 FF |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/slab.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/stat.h> | |
16 | #include <linux/nls.h> | |
17 | #include <linux/buffer_head.h> | |
18 | #include <linux/vfs.h> | |
19 | #include <linux/parser.h> | |
20 | #include <linux/namei.h> | |
31aba059 | 21 | #include <linux/sched.h> |
5b825c3a | 22 | #include <linux/cred.h> |
ac632f5b | 23 | #include <linux/exportfs.h> |
3ab7947a | 24 | #include <linux/seq_file.h> |
1da177e4 LT |
25 | |
26 | #include "befs.h" | |
27 | #include "btree.h" | |
28 | #include "inode.h" | |
29 | #include "datastream.h" | |
30 | #include "super.h" | |
31 | #include "io.h" | |
1da177e4 LT |
32 | |
33 | MODULE_DESCRIPTION("BeOS File System (BeFS) driver"); | |
34 | MODULE_AUTHOR("Will Dyson"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | /* The units the vfs expects inode->i_blocks to be in */ | |
38 | #define VFS_BLOCK_SIZE 512 | |
39 | ||
f0f49ef5 | 40 | static int befs_readdir(struct file *, struct dir_context *); |
1da177e4 LT |
41 | static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int); |
42 | static int befs_readpage(struct file *file, struct page *page); | |
43 | static sector_t befs_bmap(struct address_space *mapping, sector_t block); | |
62b80719 LB |
44 | static struct dentry *befs_lookup(struct inode *, struct dentry *, |
45 | unsigned int); | |
96eb5419 | 46 | static struct inode *befs_iget(struct super_block *, unsigned long); |
1da177e4 | 47 | static struct inode *befs_alloc_inode(struct super_block *sb); |
49f82a80 | 48 | static void befs_free_inode(struct inode *inode); |
1da177e4 | 49 | static void befs_destroy_inodecache(void); |
11803f97 | 50 | static int befs_symlink_readpage(struct file *, struct page *); |
1da177e4 LT |
51 | static int befs_utf2nls(struct super_block *sb, const char *in, int in_len, |
52 | char **out, int *out_len); | |
53 | static int befs_nls2utf(struct super_block *sb, const char *in, int in_len, | |
54 | char **out, int *out_len); | |
55 | static void befs_put_super(struct super_block *); | |
56 | static int befs_remount(struct super_block *, int *, char *); | |
726c3342 | 57 | static int befs_statfs(struct dentry *, struct kstatfs *); |
3ab7947a | 58 | static int befs_show_options(struct seq_file *, struct dentry *); |
09ad0eae | 59 | static int parse_options(char *, struct befs_mount_options *); |
ac632f5b LB |
60 | static struct dentry *befs_fh_to_dentry(struct super_block *sb, |
61 | struct fid *fid, int fh_len, int fh_type); | |
62 | static struct dentry *befs_fh_to_parent(struct super_block *sb, | |
63 | struct fid *fid, int fh_len, int fh_type); | |
dcfd9b21 | 64 | static struct dentry *befs_get_parent(struct dentry *child); |
1da177e4 LT |
65 | |
66 | static const struct super_operations befs_sops = { | |
1da177e4 | 67 | .alloc_inode = befs_alloc_inode, /* allocate a new inode */ |
49f82a80 | 68 | .free_inode = befs_free_inode, /* deallocate an inode */ |
1da177e4 LT |
69 | .put_super = befs_put_super, /* uninit super */ |
70 | .statfs = befs_statfs, /* statfs */ | |
71 | .remount_fs = befs_remount, | |
3ab7947a | 72 | .show_options = befs_show_options, |
1da177e4 LT |
73 | }; |
74 | ||
75 | /* slab cache for befs_inode_info objects */ | |
e18b890b | 76 | static struct kmem_cache *befs_inode_cachep; |
1da177e4 | 77 | |
4b6f5d20 | 78 | static const struct file_operations befs_dir_operations = { |
1da177e4 | 79 | .read = generic_read_dir, |
e23e9aa7 | 80 | .iterate_shared = befs_readdir, |
59af1584 | 81 | .llseek = generic_file_llseek, |
1da177e4 LT |
82 | }; |
83 | ||
754661f1 | 84 | static const struct inode_operations befs_dir_inode_operations = { |
1da177e4 LT |
85 | .lookup = befs_lookup, |
86 | }; | |
87 | ||
f5e54d6e | 88 | static const struct address_space_operations befs_aops = { |
1da177e4 | 89 | .readpage = befs_readpage, |
1da177e4 LT |
90 | .bmap = befs_bmap, |
91 | }; | |
92 | ||
11803f97 AV |
93 | static const struct address_space_operations befs_symlink_aops = { |
94 | .readpage = befs_symlink_readpage, | |
1da177e4 LT |
95 | }; |
96 | ||
ac632f5b LB |
97 | static const struct export_operations befs_export_operations = { |
98 | .fh_to_dentry = befs_fh_to_dentry, | |
99 | .fh_to_parent = befs_fh_to_parent, | |
dcfd9b21 | 100 | .get_parent = befs_get_parent, |
ac632f5b LB |
101 | }; |
102 | ||
e60f749b | 103 | /* |
1da177e4 | 104 | * Called by generic_file_read() to read a page of data |
e60f749b | 105 | * |
1da177e4 LT |
106 | * In turn, simply calls a generic block read function and |
107 | * passes it the address of befs_get_block, for mapping file | |
108 | * positions to disk blocks. | |
109 | */ | |
110 | static int | |
111 | befs_readpage(struct file *file, struct page *page) | |
112 | { | |
113 | return block_read_full_page(page, befs_get_block); | |
114 | } | |
115 | ||
116 | static sector_t | |
117 | befs_bmap(struct address_space *mapping, sector_t block) | |
118 | { | |
119 | return generic_block_bmap(mapping, block, befs_get_block); | |
120 | } | |
121 | ||
e60f749b LB |
122 | /* |
123 | * Generic function to map a file position (block) to a | |
1da177e4 LT |
124 | * disk offset (passed back in bh_result). |
125 | * | |
126 | * Used by many higher level functions. | |
127 | * | |
128 | * Calls befs_fblock2brun() in datastream.c to do the real work. | |
1da177e4 LT |
129 | */ |
130 | ||
131 | static int | |
132 | befs_get_block(struct inode *inode, sector_t block, | |
133 | struct buffer_head *bh_result, int create) | |
134 | { | |
135 | struct super_block *sb = inode->i_sb; | |
136 | befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; | |
137 | befs_block_run run = BAD_IADDR; | |
abcf9116 | 138 | int res; |
1da177e4 LT |
139 | ulong disk_off; |
140 | ||
141 | befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", | |
dac52fc1 | 142 | (unsigned long)inode->i_ino, (long)block); |
1da177e4 LT |
143 | if (create) { |
144 | befs_error(sb, "befs_get_block() was asked to write to " | |
dac52fc1 FF |
145 | "block %ld in inode %lu", (long)block, |
146 | (unsigned long)inode->i_ino); | |
1da177e4 LT |
147 | return -EPERM; |
148 | } | |
149 | ||
150 | res = befs_fblock2brun(sb, ds, block, &run); | |
151 | if (res != BEFS_OK) { | |
152 | befs_error(sb, | |
dac52fc1 FF |
153 | "<--- %s for inode %lu, block %ld ERROR", |
154 | __func__, (unsigned long)inode->i_ino, | |
155 | (long)block); | |
1da177e4 LT |
156 | return -EFBIG; |
157 | } | |
158 | ||
159 | disk_off = (ulong) iaddr2blockno(sb, &run); | |
160 | ||
161 | map_bh(bh_result, inode->i_sb, disk_off); | |
162 | ||
dac52fc1 FF |
163 | befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu", |
164 | __func__, (unsigned long)inode->i_ino, (long)block, | |
165 | (unsigned long)disk_off); | |
1da177e4 LT |
166 | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static struct dentry * | |
00cd8dd3 | 171 | befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
1da177e4 | 172 | { |
c9408763 | 173 | struct inode *inode; |
1da177e4 | 174 | struct super_block *sb = dir->i_sb; |
22341d8f | 175 | const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; |
1da177e4 LT |
176 | befs_off_t offset; |
177 | int ret; | |
178 | int utfnamelen; | |
179 | char *utfname; | |
180 | const char *name = dentry->d_name.name; | |
181 | ||
a455589f AV |
182 | befs_debug(sb, "---> %s name %pd inode %ld", __func__, |
183 | dentry, dir->i_ino); | |
1da177e4 LT |
184 | |
185 | /* Convert to UTF-8 */ | |
186 | if (BEFS_SB(sb)->nls) { | |
187 | ret = | |
188 | befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); | |
189 | if (ret < 0) { | |
dac52fc1 | 190 | befs_debug(sb, "<--- %s ERROR", __func__); |
1da177e4 LT |
191 | return ERR_PTR(ret); |
192 | } | |
193 | ret = befs_btree_find(sb, ds, utfname, &offset); | |
194 | kfree(utfname); | |
195 | ||
196 | } else { | |
f7769f9c | 197 | ret = befs_btree_find(sb, ds, name, &offset); |
1da177e4 LT |
198 | } |
199 | ||
200 | if (ret == BEFS_BT_NOT_FOUND) { | |
a455589f | 201 | befs_debug(sb, "<--- %s %pd not found", __func__, dentry); |
f4e4d434 | 202 | inode = NULL; |
1da177e4 | 203 | } else if (ret != BEFS_OK || offset == 0) { |
4c3897cc | 204 | befs_error(sb, "<--- %s Error", __func__); |
f4e4d434 AV |
205 | inode = ERR_PTR(-ENODATA); |
206 | } else { | |
207 | inode = befs_iget(dir->i_sb, (ino_t) offset); | |
1da177e4 | 208 | } |
dac52fc1 | 209 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 | 210 | |
f4e4d434 | 211 | return d_splice_alias(inode, dentry); |
1da177e4 LT |
212 | } |
213 | ||
214 | static int | |
f0f49ef5 | 215 | befs_readdir(struct file *file, struct dir_context *ctx) |
1da177e4 | 216 | { |
f0f49ef5 | 217 | struct inode *inode = file_inode(file); |
1da177e4 | 218 | struct super_block *sb = inode->i_sb; |
22341d8f | 219 | const befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; |
1da177e4 LT |
220 | befs_off_t value; |
221 | int result; | |
222 | size_t keysize; | |
1da177e4 | 223 | char keybuf[BEFS_NAME_LEN + 1]; |
1da177e4 | 224 | |
a455589f AV |
225 | befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld", |
226 | __func__, file, inode->i_ino, ctx->pos); | |
1da177e4 | 227 | |
9ae51a32 LB |
228 | while (1) { |
229 | result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1, | |
230 | keybuf, &keysize, &value); | |
1da177e4 | 231 | |
9ae51a32 | 232 | if (result == BEFS_ERR) { |
dac52fc1 | 233 | befs_debug(sb, "<--- %s ERROR", __func__); |
9ae51a32 LB |
234 | befs_error(sb, "IO error reading %pD (inode %lu)", |
235 | file, inode->i_ino); | |
236 | return -EIO; | |
1da177e4 | 237 | |
9ae51a32 LB |
238 | } else if (result == BEFS_BT_END) { |
239 | befs_debug(sb, "<--- %s END", __func__); | |
240 | return 0; | |
1da177e4 | 241 | |
9ae51a32 LB |
242 | } else if (result == BEFS_BT_EMPTY) { |
243 | befs_debug(sb, "<--- %s Empty directory", __func__); | |
244 | return 0; | |
1da177e4 | 245 | } |
9ae51a32 LB |
246 | |
247 | /* Convert to NLS */ | |
248 | if (BEFS_SB(sb)->nls) { | |
249 | char *nlsname; | |
250 | int nlsnamelen; | |
251 | ||
252 | result = | |
253 | befs_utf2nls(sb, keybuf, keysize, &nlsname, | |
254 | &nlsnamelen); | |
255 | if (result < 0) { | |
256 | befs_debug(sb, "<--- %s ERROR", __func__); | |
257 | return result; | |
258 | } | |
259 | if (!dir_emit(ctx, nlsname, nlsnamelen, | |
260 | (ino_t) value, DT_UNKNOWN)) { | |
261 | kfree(nlsname); | |
262 | return 0; | |
263 | } | |
f0f49ef5 | 264 | kfree(nlsname); |
9ae51a32 LB |
265 | } else { |
266 | if (!dir_emit(ctx, keybuf, keysize, | |
267 | (ino_t) value, DT_UNKNOWN)) | |
268 | return 0; | |
f0f49ef5 | 269 | } |
9ae51a32 | 270 | ctx->pos++; |
1da177e4 | 271 | } |
1da177e4 LT |
272 | } |
273 | ||
274 | static struct inode * | |
275 | befs_alloc_inode(struct super_block *sb) | |
276 | { | |
111d639d FF |
277 | struct befs_inode_info *bi; |
278 | ||
279 | bi = kmem_cache_alloc(befs_inode_cachep, GFP_KERNEL); | |
62b80719 LB |
280 | if (!bi) |
281 | return NULL; | |
282 | return &bi->vfs_inode; | |
1da177e4 LT |
283 | } |
284 | ||
49f82a80 | 285 | static void befs_free_inode(struct inode *inode) |
1da177e4 | 286 | { |
62b80719 | 287 | kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); |
1da177e4 LT |
288 | } |
289 | ||
51cc5068 | 290 | static void init_once(void *foo) |
1da177e4 | 291 | { |
62b80719 | 292 | struct befs_inode_info *bi = (struct befs_inode_info *) foo; |
a35afb83 CL |
293 | |
294 | inode_init_once(&bi->vfs_inode); | |
1da177e4 LT |
295 | } |
296 | ||
96eb5419 | 297 | static struct inode *befs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 298 | { |
e4c7f5b1 | 299 | struct buffer_head *bh; |
44ad8098 | 300 | befs_inode *raw_inode; |
038428fc | 301 | struct befs_sb_info *befs_sb = BEFS_SB(sb); |
d6e02033 | 302 | struct befs_inode_info *befs_ino; |
96eb5419 | 303 | struct inode *inode; |
1da177e4 | 304 | |
dac52fc1 | 305 | befs_debug(sb, "---> %s inode = %lu", __func__, ino); |
96eb5419 DH |
306 | |
307 | inode = iget_locked(sb, ino); | |
ac34a1b3 RP |
308 | if (!inode) |
309 | return ERR_PTR(-ENOMEM); | |
96eb5419 DH |
310 | if (!(inode->i_state & I_NEW)) |
311 | return inode; | |
1da177e4 LT |
312 | |
313 | befs_ino = BEFS_I(inode); | |
314 | ||
315 | /* convert from vfs's inode number to befs's inode number */ | |
316 | befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino); | |
317 | ||
318 | befs_debug(sb, " real inode number [%u, %hu, %hu]", | |
319 | befs_ino->i_inode_num.allocation_group, | |
320 | befs_ino->i_inode_num.start, befs_ino->i_inode_num.len); | |
321 | ||
f7f67540 | 322 | bh = sb_bread(sb, inode->i_ino); |
1da177e4 LT |
323 | if (!bh) { |
324 | befs_error(sb, "unable to read inode block - " | |
325 | "inode = %lu", inode->i_ino); | |
0418726b | 326 | goto unacquire_none; |
1da177e4 LT |
327 | } |
328 | ||
329 | raw_inode = (befs_inode *) bh->b_data; | |
330 | ||
331 | befs_dump_inode(sb, raw_inode); | |
332 | ||
333 | if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) { | |
334 | befs_error(sb, "Bad inode: %lu", inode->i_ino); | |
0418726b | 335 | goto unacquire_bh; |
1da177e4 LT |
336 | } |
337 | ||
338 | inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode); | |
339 | ||
340 | /* | |
341 | * set uid and gid. But since current BeOS is single user OS, so | |
342 | * you can change by "uid" or "gid" options. | |
e60f749b | 343 | */ |
1da177e4 LT |
344 | |
345 | inode->i_uid = befs_sb->mount_opts.use_uid ? | |
31aba059 EB |
346 | befs_sb->mount_opts.uid : |
347 | make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid)); | |
1da177e4 | 348 | inode->i_gid = befs_sb->mount_opts.use_gid ? |
31aba059 EB |
349 | befs_sb->mount_opts.gid : |
350 | make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid)); | |
1da177e4 | 351 | |
bfe86848 | 352 | set_nlink(inode, 1); |
1da177e4 LT |
353 | |
354 | /* | |
355 | * BEFS's time is 64 bits, but current VFS is 32 bits... | |
356 | * BEFS don't have access time. Nor inode change time. VFS | |
357 | * doesn't have creation time. | |
e60f749b | 358 | * Also, the lower 16 bits of the last_modified_time and |
1da177e4 LT |
359 | * create_time are just a counter to help ensure uniqueness |
360 | * for indexing purposes. (PFD, page 54) | |
361 | */ | |
362 | ||
363 | inode->i_mtime.tv_sec = | |
364 | fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16; | |
e60f749b | 365 | inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */ |
1da177e4 LT |
366 | inode->i_ctime = inode->i_mtime; |
367 | inode->i_atime = inode->i_mtime; | |
1da177e4 LT |
368 | |
369 | befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num); | |
370 | befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent); | |
371 | befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes); | |
372 | befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags); | |
373 | ||
374 | if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){ | |
375 | inode->i_size = 0; | |
376 | inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE; | |
39d7a29f FF |
377 | strlcpy(befs_ino->i_data.symlink, raw_inode->data.symlink, |
378 | BEFS_SYMLINK_LEN); | |
1da177e4 LT |
379 | } else { |
380 | int num_blks; | |
381 | ||
382 | befs_ino->i_data.ds = | |
e0e3d32b | 383 | fsds_to_cpu(sb, &raw_inode->data.datastream); |
1da177e4 LT |
384 | |
385 | num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); | |
386 | inode->i_blocks = | |
387 | num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE); | |
388 | inode->i_size = befs_ino->i_data.ds.size; | |
389 | } | |
390 | ||
391 | inode->i_mapping->a_ops = &befs_aops; | |
392 | ||
393 | if (S_ISREG(inode->i_mode)) { | |
2cf06916 | 394 | inode->i_fop = &generic_ro_fops; |
1da177e4 LT |
395 | } else if (S_ISDIR(inode->i_mode)) { |
396 | inode->i_op = &befs_dir_inode_operations; | |
397 | inode->i_fop = &befs_dir_operations; | |
398 | } else if (S_ISLNK(inode->i_mode)) { | |
d0deec19 | 399 | if (befs_ino->i_flags & BEFS_LONG_SYMLINK) { |
11803f97 | 400 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 401 | inode_nohighmem(inode); |
11803f97 | 402 | inode->i_mapping->a_ops = &befs_symlink_aops; |
d0deec19 AV |
403 | } else { |
404 | inode->i_link = befs_ino->i_data.symlink; | |
405 | inode->i_op = &simple_symlink_inode_operations; | |
406 | } | |
1da177e4 LT |
407 | } else { |
408 | befs_error(sb, "Inode %lu is not a regular file, " | |
409 | "directory or symlink. THAT IS WRONG! BeFS has no " | |
410 | "on disk special files", inode->i_ino); | |
0418726b | 411 | goto unacquire_bh; |
1da177e4 LT |
412 | } |
413 | ||
414 | brelse(bh); | |
dac52fc1 | 415 | befs_debug(sb, "<--- %s", __func__); |
96eb5419 DH |
416 | unlock_new_inode(inode); |
417 | return inode; | |
1da177e4 | 418 | |
62b80719 | 419 | unacquire_bh: |
1da177e4 LT |
420 | brelse(bh); |
421 | ||
62b80719 | 422 | unacquire_none: |
96eb5419 | 423 | iget_failed(inode); |
dac52fc1 | 424 | befs_debug(sb, "<--- %s - Bad inode", __func__); |
33c712b4 | 425 | return ERR_PTR(-EIO); |
1da177e4 LT |
426 | } |
427 | ||
428 | /* Initialize the inode cache. Called at fs setup. | |
20c2df83 | 429 | * |
1da177e4 LT |
430 | * Taken from NFS implementation by Al Viro. |
431 | */ | |
91a52ab7 | 432 | static int __init |
1da177e4 LT |
433 | befs_init_inodecache(void) |
434 | { | |
0fc256d3 DW |
435 | befs_inode_cachep = kmem_cache_create_usercopy("befs_inode_cache", |
436 | sizeof(struct befs_inode_info), 0, | |
437 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| | |
438 | SLAB_ACCOUNT), | |
439 | offsetof(struct befs_inode_info, | |
440 | i_data.symlink), | |
441 | sizeof_field(struct befs_inode_info, | |
442 | i_data.symlink), | |
443 | init_once); | |
c08f1cb6 | 444 | if (befs_inode_cachep == NULL) |
1da177e4 | 445 | return -ENOMEM; |
c08f1cb6 | 446 | |
1da177e4 LT |
447 | return 0; |
448 | } | |
449 | ||
450 | /* Called at fs teardown. | |
e60f749b | 451 | * |
1da177e4 LT |
452 | * Taken from NFS implementation by Al Viro. |
453 | */ | |
454 | static void | |
455 | befs_destroy_inodecache(void) | |
456 | { | |
8c0a8537 KS |
457 | /* |
458 | * Make sure all delayed rcu free inodes are flushed before we | |
459 | * destroy cache. | |
460 | */ | |
461 | rcu_barrier(); | |
1a1d92c1 | 462 | kmem_cache_destroy(befs_inode_cachep); |
1da177e4 LT |
463 | } |
464 | ||
465 | /* | |
466 | * The inode of symbolic link is different to data stream. | |
467 | * The data stream become link name. Unless the LONG_SYMLINK | |
468 | * flag is set. | |
469 | */ | |
11803f97 | 470 | static int befs_symlink_readpage(struct file *unused, struct page *page) |
1da177e4 | 471 | { |
11803f97 AV |
472 | struct inode *inode = page->mapping->host; |
473 | struct super_block *sb = inode->i_sb; | |
474 | struct befs_inode_info *befs_ino = BEFS_I(inode); | |
48bc06e7 AV |
475 | befs_data_stream *data = &befs_ino->i_data.ds; |
476 | befs_off_t len = data->size; | |
21fc61c7 | 477 | char *link = page_address(page); |
1da177e4 | 478 | |
11803f97 | 479 | if (len == 0 || len > PAGE_SIZE) { |
48bc06e7 | 480 | befs_error(sb, "Long symlink with illegal length"); |
11803f97 | 481 | goto fail; |
1da177e4 | 482 | } |
680baacb AV |
483 | befs_debug(sb, "Follow long symlink"); |
484 | ||
680baacb | 485 | if (befs_read_lsymlink(sb, data, link, len) != len) { |
680baacb | 486 | befs_error(sb, "Failed to read entire long symlink"); |
11803f97 | 487 | goto fail; |
680baacb AV |
488 | } |
489 | link[len - 1] = '\0'; | |
11803f97 | 490 | SetPageUptodate(page); |
11803f97 AV |
491 | unlock_page(page); |
492 | return 0; | |
493 | fail: | |
494 | SetPageError(page); | |
11803f97 AV |
495 | unlock_page(page); |
496 | return -EIO; | |
1da177e4 LT |
497 | } |
498 | ||
1da177e4 | 499 | /* |
1ca7087e | 500 | * UTF-8 to NLS charset convert routine |
e60f749b | 501 | * |
1ca7087e | 502 | * Uses uni2char() / char2uni() rather than the nls tables directly |
1da177e4 | 503 | */ |
1da177e4 LT |
504 | static int |
505 | befs_utf2nls(struct super_block *sb, const char *in, | |
506 | int in_len, char **out, int *out_len) | |
507 | { | |
508 | struct nls_table *nls = BEFS_SB(sb)->nls; | |
509 | int i, o; | |
74675a58 | 510 | unicode_t uni; |
1da177e4 LT |
511 | int unilen, utflen; |
512 | char *result; | |
94f563c4 DC |
513 | /* The utf8->nls conversion won't make the final nls string bigger |
514 | * than the utf one, but if the string is pure ascii they'll have the | |
515 | * same width and an extra char is needed to save the additional \0 | |
516 | */ | |
517 | int maxlen = in_len + 1; | |
1da177e4 | 518 | |
dac52fc1 | 519 | befs_debug(sb, "---> %s", __func__); |
1da177e4 LT |
520 | |
521 | if (!nls) { | |
dac52fc1 | 522 | befs_error(sb, "%s called with no NLS table loaded", __func__); |
1da177e4 LT |
523 | return -EINVAL; |
524 | } | |
525 | ||
526 | *out = result = kmalloc(maxlen, GFP_NOFS); | |
62b80719 | 527 | if (!*out) |
1da177e4 | 528 | return -ENOMEM; |
1da177e4 LT |
529 | |
530 | for (i = o = 0; i < in_len; i += utflen, o += unilen) { | |
531 | ||
532 | /* convert from UTF-8 to Unicode */ | |
74675a58 AS |
533 | utflen = utf8_to_utf32(&in[i], in_len - i, &uni); |
534 | if (utflen < 0) | |
1da177e4 | 535 | goto conv_err; |
1da177e4 LT |
536 | |
537 | /* convert from Unicode to nls */ | |
74675a58 AS |
538 | if (uni > MAX_WCHAR_T) |
539 | goto conv_err; | |
1da177e4 | 540 | unilen = nls->uni2char(uni, &result[o], in_len - o); |
74675a58 | 541 | if (unilen < 0) |
1da177e4 | 542 | goto conv_err; |
1da177e4 LT |
543 | } |
544 | result[o] = '\0'; | |
545 | *out_len = o; | |
546 | ||
dac52fc1 | 547 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
548 | |
549 | return o; | |
550 | ||
62b80719 | 551 | conv_err: |
1da177e4 LT |
552 | befs_error(sb, "Name using character set %s contains a character that " |
553 | "cannot be converted to unicode.", nls->charset); | |
dac52fc1 | 554 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
555 | kfree(result); |
556 | return -EILSEQ; | |
557 | } | |
558 | ||
559 | /** | |
560 | * befs_nls2utf - Convert NLS string to utf8 encodeing | |
561 | * @sb: Superblock | |
817e1d90 FF |
562 | * @in: Input string buffer in NLS format |
563 | * @in_len: Length of input string in bytes | |
564 | * @out: The output string in UTF-8 format | |
565 | * @out_len: Length of the output buffer | |
e60f749b | 566 | * |
817e1d90 | 567 | * Converts input string @in, which is in the format of the loaded NLS map, |
1da177e4 | 568 | * into a utf8 string. |
e60f749b | 569 | * |
817e1d90 | 570 | * The destination string @out is allocated by this function and the caller is |
1da177e4 | 571 | * responsible for freeing it with kfree() |
e60f749b | 572 | * |
817e1d90 | 573 | * On return, *@out_len is the length of @out in bytes. |
1da177e4 LT |
574 | * |
575 | * On success, the return value is the number of utf8 characters written to | |
817e1d90 | 576 | * the output buffer @out. |
e60f749b | 577 | * |
1da177e4 LT |
578 | * On Failure, a negative number coresponding to the error code is returned. |
579 | */ | |
580 | ||
581 | static int | |
582 | befs_nls2utf(struct super_block *sb, const char *in, | |
583 | int in_len, char **out, int *out_len) | |
584 | { | |
585 | struct nls_table *nls = BEFS_SB(sb)->nls; | |
586 | int i, o; | |
587 | wchar_t uni; | |
588 | int unilen, utflen; | |
589 | char *result; | |
1ca7087e LB |
590 | /* |
591 | * There are nls characters that will translate to 3-chars-wide UTF-8 | |
592 | * characters, an additional byte is needed to save the final \0 | |
62b80719 LB |
593 | * in special cases |
594 | */ | |
94f563c4 | 595 | int maxlen = (3 * in_len) + 1; |
1da177e4 | 596 | |
dac52fc1 | 597 | befs_debug(sb, "---> %s\n", __func__); |
1da177e4 LT |
598 | |
599 | if (!nls) { | |
dac52fc1 FF |
600 | befs_error(sb, "%s called with no NLS table loaded.", |
601 | __func__); | |
1da177e4 LT |
602 | return -EINVAL; |
603 | } | |
604 | ||
605 | *out = result = kmalloc(maxlen, GFP_NOFS); | |
606 | if (!*out) { | |
1da177e4 LT |
607 | *out_len = 0; |
608 | return -ENOMEM; | |
609 | } | |
610 | ||
611 | for (i = o = 0; i < in_len; i += unilen, o += utflen) { | |
612 | ||
613 | /* convert from nls to unicode */ | |
614 | unilen = nls->char2uni(&in[i], in_len - i, &uni); | |
74675a58 | 615 | if (unilen < 0) |
1da177e4 | 616 | goto conv_err; |
1da177e4 LT |
617 | |
618 | /* convert from unicode to UTF-8 */ | |
74675a58 AS |
619 | utflen = utf32_to_utf8(uni, &result[o], 3); |
620 | if (utflen <= 0) | |
1da177e4 | 621 | goto conv_err; |
1da177e4 LT |
622 | } |
623 | ||
624 | result[o] = '\0'; | |
625 | *out_len = o; | |
626 | ||
dac52fc1 | 627 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
628 | |
629 | return i; | |
630 | ||
62b80719 | 631 | conv_err: |
1ca7087e | 632 | befs_error(sb, "Name using character set %s contains a character that " |
1da177e4 | 633 | "cannot be converted to unicode.", nls->charset); |
dac52fc1 | 634 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
635 | kfree(result); |
636 | return -EILSEQ; | |
637 | } | |
638 | ||
ac632f5b LB |
639 | static struct inode *befs_nfs_get_inode(struct super_block *sb, uint64_t ino, |
640 | uint32_t generation) | |
641 | { | |
642 | /* No need to handle i_generation */ | |
643 | return befs_iget(sb, ino); | |
644 | } | |
645 | ||
646 | /* | |
647 | * Map a NFS file handle to a corresponding dentry | |
648 | */ | |
649 | static struct dentry *befs_fh_to_dentry(struct super_block *sb, | |
650 | struct fid *fid, int fh_len, int fh_type) | |
651 | { | |
652 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
653 | befs_nfs_get_inode); | |
654 | } | |
655 | ||
656 | /* | |
657 | * Find the parent for a file specified by NFS handle | |
658 | */ | |
659 | static struct dentry *befs_fh_to_parent(struct super_block *sb, | |
660 | struct fid *fid, int fh_len, int fh_type) | |
661 | { | |
662 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
663 | befs_nfs_get_inode); | |
664 | } | |
665 | ||
dcfd9b21 FF |
666 | static struct dentry *befs_get_parent(struct dentry *child) |
667 | { | |
668 | struct inode *parent; | |
669 | struct befs_inode_info *befs_ino = BEFS_I(d_inode(child)); | |
670 | ||
671 | parent = befs_iget(child->d_sb, | |
672 | (unsigned long)befs_ino->i_parent.start); | |
673 | if (IS_ERR(parent)) | |
674 | return ERR_CAST(parent); | |
675 | ||
676 | return d_obtain_alias(parent); | |
677 | } | |
678 | ||
1da177e4 LT |
679 | enum { |
680 | Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err, | |
681 | }; | |
682 | ||
a447c093 | 683 | static const match_table_t befs_tokens = { |
1da177e4 LT |
684 | {Opt_uid, "uid=%d"}, |
685 | {Opt_gid, "gid=%d"}, | |
686 | {Opt_charset, "iocharset=%s"}, | |
687 | {Opt_debug, "debug"}, | |
688 | {Opt_err, NULL} | |
689 | }; | |
690 | ||
691 | static int | |
09ad0eae | 692 | parse_options(char *options, struct befs_mount_options *opts) |
1da177e4 LT |
693 | { |
694 | char *p; | |
695 | substring_t args[MAX_OPT_ARGS]; | |
696 | int option; | |
31aba059 EB |
697 | kuid_t uid; |
698 | kgid_t gid; | |
1da177e4 LT |
699 | |
700 | /* Initialize options */ | |
31aba059 EB |
701 | opts->uid = GLOBAL_ROOT_UID; |
702 | opts->gid = GLOBAL_ROOT_GID; | |
1da177e4 LT |
703 | opts->use_uid = 0; |
704 | opts->use_gid = 0; | |
705 | opts->iocharset = NULL; | |
706 | opts->debug = 0; | |
707 | ||
708 | if (!options) | |
709 | return 1; | |
710 | ||
711 | while ((p = strsep(&options, ",")) != NULL) { | |
712 | int token; | |
62b80719 | 713 | |
1da177e4 LT |
714 | if (!*p) |
715 | continue; | |
716 | ||
717 | token = match_token(p, befs_tokens, args); | |
718 | switch (token) { | |
719 | case Opt_uid: | |
720 | if (match_int(&args[0], &option)) | |
721 | return 0; | |
31aba059 EB |
722 | uid = INVALID_UID; |
723 | if (option >= 0) | |
724 | uid = make_kuid(current_user_ns(), option); | |
725 | if (!uid_valid(uid)) { | |
dac52fc1 FF |
726 | pr_err("Invalid uid %d, " |
727 | "using default\n", option); | |
1da177e4 LT |
728 | break; |
729 | } | |
31aba059 | 730 | opts->uid = uid; |
1da177e4 LT |
731 | opts->use_uid = 1; |
732 | break; | |
733 | case Opt_gid: | |
734 | if (match_int(&args[0], &option)) | |
735 | return 0; | |
31aba059 EB |
736 | gid = INVALID_GID; |
737 | if (option >= 0) | |
738 | gid = make_kgid(current_user_ns(), option); | |
739 | if (!gid_valid(gid)) { | |
dac52fc1 FF |
740 | pr_err("Invalid gid %d, " |
741 | "using default\n", option); | |
1da177e4 LT |
742 | break; |
743 | } | |
31aba059 | 744 | opts->gid = gid; |
1da177e4 LT |
745 | opts->use_gid = 1; |
746 | break; | |
747 | case Opt_charset: | |
748 | kfree(opts->iocharset); | |
749 | opts->iocharset = match_strdup(&args[0]); | |
750 | if (!opts->iocharset) { | |
dac52fc1 FF |
751 | pr_err("allocation failure for " |
752 | "iocharset string\n"); | |
1da177e4 LT |
753 | return 0; |
754 | } | |
755 | break; | |
756 | case Opt_debug: | |
757 | opts->debug = 1; | |
758 | break; | |
759 | default: | |
dac52fc1 FF |
760 | pr_err("Unrecognized mount option \"%s\" " |
761 | "or missing value\n", p); | |
1da177e4 LT |
762 | return 0; |
763 | } | |
764 | } | |
765 | return 1; | |
766 | } | |
767 | ||
3ab7947a DH |
768 | static int befs_show_options(struct seq_file *m, struct dentry *root) |
769 | { | |
770 | struct befs_sb_info *befs_sb = BEFS_SB(root->d_sb); | |
771 | struct befs_mount_options *opts = &befs_sb->mount_opts; | |
772 | ||
773 | if (!uid_eq(opts->uid, GLOBAL_ROOT_UID)) | |
774 | seq_printf(m, ",uid=%u", | |
775 | from_kuid_munged(&init_user_ns, opts->uid)); | |
776 | if (!gid_eq(opts->gid, GLOBAL_ROOT_GID)) | |
777 | seq_printf(m, ",gid=%u", | |
778 | from_kgid_munged(&init_user_ns, opts->gid)); | |
779 | if (opts->iocharset) | |
780 | seq_printf(m, ",charset=%s", opts->iocharset); | |
781 | if (opts->debug) | |
782 | seq_puts(m, ",debug"); | |
783 | return 0; | |
784 | } | |
785 | ||
1da177e4 | 786 | /* This function has the responsibiltiy of getting the |
e60f749b | 787 | * filesystem ready for unmounting. |
25985edc | 788 | * Basically, we free everything that we allocated in |
1da177e4 LT |
789 | * befs_read_inode |
790 | */ | |
791 | static void | |
792 | befs_put_super(struct super_block *sb) | |
793 | { | |
f99d49ad JJ |
794 | kfree(BEFS_SB(sb)->mount_opts.iocharset); |
795 | BEFS_SB(sb)->mount_opts.iocharset = NULL; | |
6d729e44 | 796 | unload_nls(BEFS_SB(sb)->nls); |
f99d49ad JJ |
797 | kfree(sb->s_fs_info); |
798 | sb->s_fs_info = NULL; | |
1da177e4 LT |
799 | } |
800 | ||
801 | /* Allocate private field of the superblock, fill it. | |
802 | * | |
803 | * Finish filling the public superblock fields | |
804 | * Make the root directory | |
805 | * Load a set of NLS translations if needed. | |
806 | */ | |
807 | static int | |
808 | befs_fill_super(struct super_block *sb, void *data, int silent) | |
809 | { | |
810 | struct buffer_head *bh; | |
038428fc | 811 | struct befs_sb_info *befs_sb; |
1da177e4 LT |
812 | befs_super_block *disk_sb; |
813 | struct inode *root; | |
96eb5419 | 814 | long ret = -EINVAL; |
1da177e4 LT |
815 | const unsigned long sb_block = 0; |
816 | const off_t x86_sb_off = 512; | |
173b066f | 817 | int blocksize; |
1da177e4 | 818 | |
2d4319ef | 819 | sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL); |
c625426f | 820 | if (sb->s_fs_info == NULL) |
0418726b | 821 | goto unacquire_none; |
c625426f | 822 | |
1da177e4 | 823 | befs_sb = BEFS_SB(sb); |
1da177e4 LT |
824 | |
825 | if (!parse_options((char *) data, &befs_sb->mount_opts)) { | |
dceee2e2 ST |
826 | if (!silent) |
827 | befs_error(sb, "cannot parse mount options"); | |
0418726b | 828 | goto unacquire_priv_sbp; |
1da177e4 LT |
829 | } |
830 | ||
dac52fc1 | 831 | befs_debug(sb, "---> %s", __func__); |
1da177e4 | 832 | |
bc98a42c | 833 | if (!sb_rdonly(sb)) { |
1da177e4 LT |
834 | befs_warning(sb, |
835 | "No write support. Marking filesystem read-only"); | |
1751e8a6 | 836 | sb->s_flags |= SB_RDONLY; |
1da177e4 | 837 | } |
1da177e4 LT |
838 | |
839 | /* | |
840 | * Set dummy blocksize to read super block. | |
841 | * Will be set to real fs blocksize later. | |
842 | * | |
843 | * Linux 2.4.10 and later refuse to read blocks smaller than | |
a441b0d0 | 844 | * the logical block size for the device. But we also need to read at |
1da177e4 | 845 | * least 1k to get the second 512 bytes of the volume. |
e60f749b | 846 | */ |
173b066f LB |
847 | blocksize = sb_min_blocksize(sb, 1024); |
848 | if (!blocksize) { | |
a6499850 LB |
849 | if (!silent) |
850 | befs_error(sb, "unable to set blocksize"); | |
173b066f LB |
851 | goto unacquire_priv_sbp; |
852 | } | |
1da177e4 | 853 | |
62b80719 LB |
854 | bh = sb_bread(sb, sb_block); |
855 | if (!bh) { | |
dceee2e2 ST |
856 | if (!silent) |
857 | befs_error(sb, "unable to read superblock"); | |
0418726b | 858 | goto unacquire_priv_sbp; |
1da177e4 LT |
859 | } |
860 | ||
861 | /* account for offset of super block on x86 */ | |
862 | disk_sb = (befs_super_block *) bh->b_data; | |
152b95a1 HH |
863 | if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) || |
864 | (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) { | |
1da177e4 LT |
865 | befs_debug(sb, "Using PPC superblock location"); |
866 | } else { | |
867 | befs_debug(sb, "Using x86 superblock location"); | |
868 | disk_sb = | |
869 | (befs_super_block *) ((void *) bh->b_data + x86_sb_off); | |
870 | } | |
871 | ||
8e19189e FF |
872 | if ((befs_load_sb(sb, disk_sb) != BEFS_OK) || |
873 | (befs_check_sb(sb) != BEFS_OK)) | |
0418726b | 874 | goto unacquire_bh; |
1da177e4 LT |
875 | |
876 | befs_dump_super_block(sb, disk_sb); | |
877 | ||
878 | brelse(bh); | |
879 | ||
62b80719 | 880 | if (befs_sb->num_blocks > ~((sector_t)0)) { |
dceee2e2 ST |
881 | if (!silent) |
882 | befs_error(sb, "blocks count: %llu is larger than the host can use", | |
883 | befs_sb->num_blocks); | |
0418726b | 884 | goto unacquire_priv_sbp; |
1da177e4 LT |
885 | } |
886 | ||
887 | /* | |
888 | * set up enough so that it can read an inode | |
889 | * Fill in kernel superblock fields from private sb | |
890 | */ | |
891 | sb->s_magic = BEFS_SUPER_MAGIC; | |
892 | /* Set real blocksize of fs */ | |
893 | sb_set_blocksize(sb, (ulong) befs_sb->block_size); | |
b87221de | 894 | sb->s_op = &befs_sops; |
ac632f5b | 895 | sb->s_export_op = &befs_export_operations; |
22b13969 DD |
896 | sb->s_time_min = 0; |
897 | sb->s_time_max = 0xffffffffffffll; | |
96eb5419 DH |
898 | root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir))); |
899 | if (IS_ERR(root)) { | |
900 | ret = PTR_ERR(root); | |
901 | goto unacquire_priv_sbp; | |
902 | } | |
48fde701 | 903 | sb->s_root = d_make_root(root); |
1da177e4 | 904 | if (!sb->s_root) { |
dceee2e2 ST |
905 | if (!silent) |
906 | befs_error(sb, "get root inode failed"); | |
0418726b | 907 | goto unacquire_priv_sbp; |
1da177e4 LT |
908 | } |
909 | ||
910 | /* load nls library */ | |
911 | if (befs_sb->mount_opts.iocharset) { | |
912 | befs_debug(sb, "Loading nls: %s", | |
913 | befs_sb->mount_opts.iocharset); | |
914 | befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset); | |
915 | if (!befs_sb->nls) { | |
916 | befs_warning(sb, "Cannot load nls %s" | |
917 | " loading default nls", | |
918 | befs_sb->mount_opts.iocharset); | |
919 | befs_sb->nls = load_nls_default(); | |
920 | } | |
921 | /* load default nls if none is specified in mount options */ | |
922 | } else { | |
923 | befs_debug(sb, "Loading default nls"); | |
924 | befs_sb->nls = load_nls_default(); | |
925 | } | |
926 | ||
927 | return 0; | |
62b80719 LB |
928 | |
929 | unacquire_bh: | |
1da177e4 LT |
930 | brelse(bh); |
931 | ||
62b80719 | 932 | unacquire_priv_sbp: |
8dd5ca53 | 933 | kfree(befs_sb->mount_opts.iocharset); |
1da177e4 | 934 | kfree(sb->s_fs_info); |
30982583 | 935 | sb->s_fs_info = NULL; |
1da177e4 | 936 | |
62b80719 | 937 | unacquire_none: |
96eb5419 | 938 | return ret; |
1da177e4 LT |
939 | } |
940 | ||
941 | static int | |
942 | befs_remount(struct super_block *sb, int *flags, char *data) | |
943 | { | |
02b9984d | 944 | sync_filesystem(sb); |
1751e8a6 | 945 | if (!(*flags & SB_RDONLY)) |
1da177e4 LT |
946 | return -EINVAL; |
947 | return 0; | |
948 | } | |
949 | ||
950 | static int | |
726c3342 | 951 | befs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 952 | { |
726c3342 | 953 | struct super_block *sb = dentry->d_sb; |
8587246a | 954 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
1da177e4 | 955 | |
dac52fc1 | 956 | befs_debug(sb, "---> %s", __func__); |
1da177e4 LT |
957 | |
958 | buf->f_type = BEFS_SUPER_MAGIC; | |
959 | buf->f_bsize = sb->s_blocksize; | |
960 | buf->f_blocks = BEFS_SB(sb)->num_blocks; | |
961 | buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks; | |
962 | buf->f_bavail = buf->f_bfree; | |
963 | buf->f_files = 0; /* UNKNOWN */ | |
964 | buf->f_ffree = 0; /* UNKNOWN */ | |
8587246a CL |
965 | buf->f_fsid.val[0] = (u32)id; |
966 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
967 | buf->f_namelen = BEFS_NAME_LEN; |
968 | ||
dac52fc1 | 969 | befs_debug(sb, "<--- %s", __func__); |
1da177e4 LT |
970 | |
971 | return 0; | |
972 | } | |
973 | ||
152a0836 AV |
974 | static struct dentry * |
975 | befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, | |
976 | void *data) | |
1da177e4 | 977 | { |
152a0836 | 978 | return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super); |
1da177e4 LT |
979 | } |
980 | ||
981 | static struct file_system_type befs_fs_type = { | |
982 | .owner = THIS_MODULE, | |
983 | .name = "befs", | |
152a0836 | 984 | .mount = befs_mount, |
1da177e4 | 985 | .kill_sb = kill_block_super, |
e60f749b | 986 | .fs_flags = FS_REQUIRES_DEV, |
1da177e4 | 987 | }; |
7f78e035 | 988 | MODULE_ALIAS_FS("befs"); |
1da177e4 LT |
989 | |
990 | static int __init | |
991 | init_befs_fs(void) | |
992 | { | |
993 | int err; | |
994 | ||
dac52fc1 | 995 | pr_info("version: %s\n", BEFS_VERSION); |
1da177e4 LT |
996 | |
997 | err = befs_init_inodecache(); | |
998 | if (err) | |
0418726b | 999 | goto unacquire_none; |
1da177e4 LT |
1000 | |
1001 | err = register_filesystem(&befs_fs_type); | |
1002 | if (err) | |
0418726b | 1003 | goto unacquire_inodecache; |
1da177e4 LT |
1004 | |
1005 | return 0; | |
1006 | ||
0418726b | 1007 | unacquire_inodecache: |
1da177e4 LT |
1008 | befs_destroy_inodecache(); |
1009 | ||
0418726b | 1010 | unacquire_none: |
1da177e4 LT |
1011 | return err; |
1012 | } | |
1013 | ||
1014 | static void __exit | |
1015 | exit_befs_fs(void) | |
1016 | { | |
1017 | befs_destroy_inodecache(); | |
1018 | ||
1019 | unregister_filesystem(&befs_fs_type); | |
1020 | } | |
1021 | ||
1022 | /* | |
62b80719 LB |
1023 | * Macros that typecheck the init and exit functions, |
1024 | * ensures that they are called at init and cleanup, | |
1025 | * and eliminates warnings about unused functions. | |
1026 | */ | |
1da177e4 LT |
1027 | module_init(init_befs_fs) |
1028 | module_exit(exit_befs_fs) |