2 * linux/fs/befs/linuxvfs.c
4 * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/slab.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>
20 #include <linux/sched.h>
25 #include "datastream.h"
29 MODULE_DESCRIPTION("BeOS File System (BeFS) driver");
30 MODULE_AUTHOR("Will Dyson");
31 MODULE_LICENSE("GPL");
33 /* The units the vfs expects inode->i_blocks to be in */
34 #define VFS_BLOCK_SIZE 512
36 static int befs_readdir(struct file *, struct dir_context *);
37 static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int);
38 static int befs_readpage(struct file *file, struct page *page);
39 static sector_t befs_bmap(struct address_space *mapping, sector_t block);
40 static struct dentry *befs_lookup(struct inode *, struct dentry *, unsigned int);
41 static struct inode *befs_iget(struct super_block *, unsigned long);
42 static struct inode *befs_alloc_inode(struct super_block *sb);
43 static void befs_destroy_inode(struct inode *inode);
44 static void befs_destroy_inodecache(void);
45 static const char *befs_follow_link(struct dentry *, void **);
46 static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
47 char **out, int *out_len);
48 static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
49 char **out, int *out_len);
50 static void befs_put_super(struct super_block *);
51 static int befs_remount(struct super_block *, int *, char *);
52 static int befs_statfs(struct dentry *, struct kstatfs *);
53 static int parse_options(char *, struct befs_mount_options *);
55 static const struct super_operations befs_sops = {
56 .alloc_inode = befs_alloc_inode, /* allocate a new inode */
57 .destroy_inode = befs_destroy_inode, /* deallocate an inode */
58 .put_super = befs_put_super, /* uninit super */
59 .statfs = befs_statfs, /* statfs */
60 .remount_fs = befs_remount,
61 .show_options = generic_show_options,
64 /* slab cache for befs_inode_info objects */
65 static struct kmem_cache *befs_inode_cachep;
67 static const struct file_operations befs_dir_operations = {
68 .read = generic_read_dir,
69 .iterate = befs_readdir,
70 .llseek = generic_file_llseek,
73 static const struct inode_operations befs_dir_inode_operations = {
74 .lookup = befs_lookup,
77 static const struct address_space_operations befs_aops = {
78 .readpage = befs_readpage,
82 static const struct inode_operations befs_symlink_inode_operations = {
83 .readlink = generic_readlink,
84 .follow_link = befs_follow_link,
85 .put_link = kfree_put_link,
89 * Called by generic_file_read() to read a page of data
91 * In turn, simply calls a generic block read function and
92 * passes it the address of befs_get_block, for mapping file
93 * positions to disk blocks.
96 befs_readpage(struct file *file, struct page *page)
98 return block_read_full_page(page, befs_get_block);
102 befs_bmap(struct address_space *mapping, sector_t block)
104 return generic_block_bmap(mapping, block, befs_get_block);
108 * Generic function to map a file position (block) to a
109 * disk offset (passed back in bh_result).
111 * Used by many higher level functions.
113 * Calls befs_fblock2brun() in datastream.c to do the real work.
119 befs_get_block(struct inode *inode, sector_t block,
120 struct buffer_head *bh_result, int create)
122 struct super_block *sb = inode->i_sb;
123 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
124 befs_block_run run = BAD_IADDR;
128 befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld",
129 (unsigned long)inode->i_ino, (long)block);
131 befs_error(sb, "befs_get_block() was asked to write to "
132 "block %ld in inode %lu", (long)block,
133 (unsigned long)inode->i_ino);
137 res = befs_fblock2brun(sb, ds, block, &run);
138 if (res != BEFS_OK) {
140 "<--- %s for inode %lu, block %ld ERROR",
141 __func__, (unsigned long)inode->i_ino,
146 disk_off = (ulong) iaddr2blockno(sb, &run);
148 map_bh(bh_result, inode->i_sb, disk_off);
150 befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu",
151 __func__, (unsigned long)inode->i_ino, (long)block,
152 (unsigned long)disk_off);
157 static struct dentry *
158 befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
160 struct inode *inode = NULL;
161 struct super_block *sb = dir->i_sb;
162 befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
167 const char *name = dentry->d_name.name;
169 befs_debug(sb, "---> %s name %pd inode %ld", __func__,
172 /* Convert to UTF-8 */
173 if (BEFS_SB(sb)->nls) {
175 befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen);
177 befs_debug(sb, "<--- %s ERROR", __func__);
180 ret = befs_btree_find(sb, ds, utfname, &offset);
184 ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset);
187 if (ret == BEFS_BT_NOT_FOUND) {
188 befs_debug(sb, "<--- %s %pd not found", __func__, dentry);
189 return ERR_PTR(-ENOENT);
191 } else if (ret != BEFS_OK || offset == 0) {
192 befs_warning(sb, "<--- %s Error", __func__);
193 return ERR_PTR(-ENODATA);
196 inode = befs_iget(dir->i_sb, (ino_t) offset);
198 return ERR_CAST(inode);
200 d_add(dentry, inode);
202 befs_debug(sb, "<--- %s", __func__);
208 befs_readdir(struct file *file, struct dir_context *ctx)
210 struct inode *inode = file_inode(file);
211 struct super_block *sb = inode->i_sb;
212 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
216 unsigned char d_type;
217 char keybuf[BEFS_NAME_LEN + 1];
219 befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld",
220 __func__, file, inode->i_ino, ctx->pos);
223 result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1,
224 keybuf, &keysize, &value);
226 if (result == BEFS_ERR) {
227 befs_debug(sb, "<--- %s ERROR", __func__);
228 befs_error(sb, "IO error reading %pD (inode %lu)",
232 } else if (result == BEFS_BT_END) {
233 befs_debug(sb, "<--- %s END", __func__);
236 } else if (result == BEFS_BT_EMPTY) {
237 befs_debug(sb, "<--- %s Empty directory", __func__);
244 if (BEFS_SB(sb)->nls) {
248 befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen);
250 befs_debug(sb, "<--- %s ERROR", __func__);
253 if (!dir_emit(ctx, nlsname, nlsnamelen,
254 (ino_t) value, d_type)) {
260 if (!dir_emit(ctx, keybuf, keysize,
261 (ino_t) value, d_type))
268 static struct inode *
269 befs_alloc_inode(struct super_block *sb)
271 struct befs_inode_info *bi;
273 bi = kmem_cache_alloc(befs_inode_cachep, GFP_KERNEL);
276 return &bi->vfs_inode;
279 static void befs_i_callback(struct rcu_head *head)
281 struct inode *inode = container_of(head, struct inode, i_rcu);
282 kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
285 static void befs_destroy_inode(struct inode *inode)
287 call_rcu(&inode->i_rcu, befs_i_callback);
290 static void init_once(void *foo)
292 struct befs_inode_info *bi = (struct befs_inode_info *) foo;
294 inode_init_once(&bi->vfs_inode);
297 static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
299 struct buffer_head *bh = NULL;
300 befs_inode *raw_inode = NULL;
301 struct befs_sb_info *befs_sb = BEFS_SB(sb);
302 struct befs_inode_info *befs_ino = NULL;
306 befs_debug(sb, "---> %s inode = %lu", __func__, ino);
308 inode = iget_locked(sb, ino);
310 return ERR_PTR(-ENOMEM);
311 if (!(inode->i_state & I_NEW))
314 befs_ino = BEFS_I(inode);
316 /* convert from vfs's inode number to befs's inode number */
317 befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino);
319 befs_debug(sb, " real inode number [%u, %hu, %hu]",
320 befs_ino->i_inode_num.allocation_group,
321 befs_ino->i_inode_num.start, befs_ino->i_inode_num.len);
323 bh = befs_bread(sb, inode->i_ino);
325 befs_error(sb, "unable to read inode block - "
326 "inode = %lu", inode->i_ino);
330 raw_inode = (befs_inode *) bh->b_data;
332 befs_dump_inode(sb, raw_inode);
334 if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) {
335 befs_error(sb, "Bad inode: %lu", inode->i_ino);
339 inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode);
342 * set uid and gid. But since current BeOS is single user OS, so
343 * you can change by "uid" or "gid" options.
346 inode->i_uid = befs_sb->mount_opts.use_uid ?
347 befs_sb->mount_opts.uid :
348 make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid));
349 inode->i_gid = befs_sb->mount_opts.use_gid ?
350 befs_sb->mount_opts.gid :
351 make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid));
356 * BEFS's time is 64 bits, but current VFS is 32 bits...
357 * BEFS don't have access time. Nor inode change time. VFS
358 * doesn't have creation time.
359 * Also, the lower 16 bits of the last_modified_time and
360 * create_time are just a counter to help ensure uniqueness
361 * for indexing purposes. (PFD, page 54)
364 inode->i_mtime.tv_sec =
365 fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16;
366 inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */
367 inode->i_ctime = inode->i_mtime;
368 inode->i_atime = inode->i_mtime;
370 befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num);
371 befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent);
372 befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes);
373 befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags);
375 if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){
377 inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE;
378 strlcpy(befs_ino->i_data.symlink, raw_inode->data.symlink,
383 befs_ino->i_data.ds =
384 fsds_to_cpu(sb, &raw_inode->data.datastream);
386 num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds);
388 num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE);
389 inode->i_size = befs_ino->i_data.ds.size;
392 inode->i_mapping->a_ops = &befs_aops;
394 if (S_ISREG(inode->i_mode)) {
395 inode->i_fop = &generic_ro_fops;
396 } else if (S_ISDIR(inode->i_mode)) {
397 inode->i_op = &befs_dir_inode_operations;
398 inode->i_fop = &befs_dir_operations;
399 } else if (S_ISLNK(inode->i_mode)) {
400 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
401 inode->i_op = &befs_symlink_inode_operations;
403 inode->i_link = befs_ino->i_data.symlink;
404 inode->i_op = &simple_symlink_inode_operations;
407 befs_error(sb, "Inode %lu is not a regular file, "
408 "directory or symlink. THAT IS WRONG! BeFS has no "
409 "on disk special files", inode->i_ino);
414 befs_debug(sb, "<--- %s", __func__);
415 unlock_new_inode(inode);
423 befs_debug(sb, "<--- %s - Bad inode", __func__);
427 /* Initialize the inode cache. Called at fs setup.
429 * Taken from NFS implementation by Al Viro.
432 befs_init_inodecache(void)
434 befs_inode_cachep = kmem_cache_create("befs_inode_cache",
435 sizeof (struct befs_inode_info),
436 0, (SLAB_RECLAIM_ACCOUNT|
439 if (befs_inode_cachep == NULL) {
440 pr_err("%s: Couldn't initialize inode slabcache\n", __func__);
446 /* Called at fs teardown.
448 * Taken from NFS implementation by Al Viro.
451 befs_destroy_inodecache(void)
454 * Make sure all delayed rcu free inodes are flushed before we
458 kmem_cache_destroy(befs_inode_cachep);
462 * The inode of symbolic link is different to data stream.
463 * The data stream become link name. Unless the LONG_SYMLINK
467 befs_follow_link(struct dentry *dentry, void **cookie)
469 struct super_block *sb = dentry->d_sb;
470 struct befs_inode_info *befs_ino = BEFS_I(d_inode(dentry));
471 befs_data_stream *data = &befs_ino->i_data.ds;
472 befs_off_t len = data->size;
476 befs_error(sb, "Long symlink with illegal length");
477 return ERR_PTR(-EIO);
479 befs_debug(sb, "Follow long symlink");
481 link = kmalloc(len, GFP_NOFS);
483 return ERR_PTR(-ENOMEM);
484 if (befs_read_lsymlink(sb, data, link, len) != len) {
486 befs_error(sb, "Failed to read entire long symlink");
487 return ERR_PTR(-EIO);
489 link[len - 1] = '\0';
490 return *cookie = link;
494 * UTF-8 to NLS charset convert routine
497 * Changed 8/10/01 by Will Dyson. Now use uni2char() / char2uni() rather than
498 * the nls tables directly
502 befs_utf2nls(struct super_block *sb, const char *in,
503 int in_len, char **out, int *out_len)
505 struct nls_table *nls = BEFS_SB(sb)->nls;
510 /* The utf8->nls conversion won't make the final nls string bigger
511 * than the utf one, but if the string is pure ascii they'll have the
512 * same width and an extra char is needed to save the additional \0
514 int maxlen = in_len + 1;
516 befs_debug(sb, "---> %s", __func__);
519 befs_error(sb, "%s called with no NLS table loaded", __func__);
523 *out = result = kmalloc(maxlen, GFP_NOFS);
525 befs_error(sb, "%s cannot allocate memory", __func__);
530 for (i = o = 0; i < in_len; i += utflen, o += unilen) {
532 /* convert from UTF-8 to Unicode */
533 utflen = utf8_to_utf32(&in[i], in_len - i, &uni);
537 /* convert from Unicode to nls */
538 if (uni > MAX_WCHAR_T)
540 unilen = nls->uni2char(uni, &result[o], in_len - o);
547 befs_debug(sb, "<--- %s", __func__);
552 befs_error(sb, "Name using character set %s contains a character that "
553 "cannot be converted to unicode.", nls->charset);
554 befs_debug(sb, "<--- %s", __func__);
560 * befs_nls2utf - Convert NLS string to utf8 encodeing
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
567 * Converts input string @in, which is in the format of the loaded NLS map,
568 * into a utf8 string.
570 * The destination string @out is allocated by this function and the caller is
571 * responsible for freeing it with kfree()
573 * On return, *@out_len is the length of @out in bytes.
575 * On success, the return value is the number of utf8 characters written to
576 * the output buffer @out.
578 * On Failure, a negative number coresponding to the error code is returned.
582 befs_nls2utf(struct super_block *sb, const char *in,
583 int in_len, char **out, int *out_len)
585 struct nls_table *nls = BEFS_SB(sb)->nls;
590 /* There're nls characters that will translate to 3-chars-wide UTF-8
591 * characters, a additional byte is needed to save the final \0
592 * in special cases */
593 int maxlen = (3 * in_len) + 1;
595 befs_debug(sb, "---> %s\n", __func__);
598 befs_error(sb, "%s called with no NLS table loaded.",
603 *out = result = kmalloc(maxlen, GFP_NOFS);
605 befs_error(sb, "%s cannot allocate memory", __func__);
610 for (i = o = 0; i < in_len; i += unilen, o += utflen) {
612 /* convert from nls to unicode */
613 unilen = nls->char2uni(&in[i], in_len - i, &uni);
617 /* convert from unicode to UTF-8 */
618 utflen = utf32_to_utf8(uni, &result[o], 3);
626 befs_debug(sb, "<--- %s", __func__);
631 befs_error(sb, "Name using charecter set %s contains a charecter that "
632 "cannot be converted to unicode.", nls->charset);
633 befs_debug(sb, "<--- %s", __func__);
643 Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
646 static const match_table_t befs_tokens = {
649 {Opt_charset, "iocharset=%s"},
650 {Opt_debug, "debug"},
655 parse_options(char *options, struct befs_mount_options *opts)
658 substring_t args[MAX_OPT_ARGS];
663 /* Initialize options */
664 opts->uid = GLOBAL_ROOT_UID;
665 opts->gid = GLOBAL_ROOT_GID;
668 opts->iocharset = NULL;
674 while ((p = strsep(&options, ",")) != NULL) {
679 token = match_token(p, befs_tokens, args);
682 if (match_int(&args[0], &option))
686 uid = make_kuid(current_user_ns(), option);
687 if (!uid_valid(uid)) {
688 pr_err("Invalid uid %d, "
689 "using default\n", option);
696 if (match_int(&args[0], &option))
700 gid = make_kgid(current_user_ns(), option);
701 if (!gid_valid(gid)) {
702 pr_err("Invalid gid %d, "
703 "using default\n", option);
710 kfree(opts->iocharset);
711 opts->iocharset = match_strdup(&args[0]);
712 if (!opts->iocharset) {
713 pr_err("allocation failure for "
714 "iocharset string\n");
722 pr_err("Unrecognized mount option \"%s\" "
723 "or missing value\n", p);
730 /* This function has the responsibiltiy of getting the
731 * filesystem ready for unmounting.
732 * Basically, we free everything that we allocated in
736 befs_put_super(struct super_block *sb)
738 kfree(BEFS_SB(sb)->mount_opts.iocharset);
739 BEFS_SB(sb)->mount_opts.iocharset = NULL;
740 unload_nls(BEFS_SB(sb)->nls);
741 kfree(sb->s_fs_info);
742 sb->s_fs_info = NULL;
745 /* Allocate private field of the superblock, fill it.
747 * Finish filling the public superblock fields
748 * Make the root directory
749 * Load a set of NLS translations if needed.
752 befs_fill_super(struct super_block *sb, void *data, int silent)
754 struct buffer_head *bh;
755 struct befs_sb_info *befs_sb;
756 befs_super_block *disk_sb;
759 const unsigned long sb_block = 0;
760 const off_t x86_sb_off = 512;
762 save_mount_options(sb, data);
764 sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL);
765 if (sb->s_fs_info == NULL) {
766 pr_err("(%s): Unable to allocate memory for private "
767 "portion of superblock. Bailing.\n", sb->s_id);
770 befs_sb = BEFS_SB(sb);
772 if (!parse_options((char *) data, &befs_sb->mount_opts)) {
773 befs_error(sb, "cannot parse mount options");
774 goto unacquire_priv_sbp;
777 befs_debug(sb, "---> %s", __func__);
779 if (!(sb->s_flags & MS_RDONLY)) {
781 "No write support. Marking filesystem read-only");
782 sb->s_flags |= MS_RDONLY;
786 * Set dummy blocksize to read super block.
787 * Will be set to real fs blocksize later.
789 * Linux 2.4.10 and later refuse to read blocks smaller than
790 * the hardsect size for the device. But we also need to read at
791 * least 1k to get the second 512 bytes of the volume.
794 sb_min_blocksize(sb, 1024);
796 if (!(bh = sb_bread(sb, sb_block))) {
797 befs_error(sb, "unable to read superblock");
798 goto unacquire_priv_sbp;
801 /* account for offset of super block on x86 */
802 disk_sb = (befs_super_block *) bh->b_data;
803 if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) ||
804 (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) {
805 befs_debug(sb, "Using PPC superblock location");
807 befs_debug(sb, "Using x86 superblock location");
809 (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
812 if ((befs_load_sb(sb, disk_sb) != BEFS_OK) ||
813 (befs_check_sb(sb) != BEFS_OK))
816 befs_dump_super_block(sb, disk_sb);
820 if( befs_sb->num_blocks > ~((sector_t)0) ) {
821 befs_error(sb, "blocks count: %llu "
822 "is larger than the host can use",
823 befs_sb->num_blocks);
824 goto unacquire_priv_sbp;
828 * set up enough so that it can read an inode
829 * Fill in kernel superblock fields from private sb
831 sb->s_magic = BEFS_SUPER_MAGIC;
832 /* Set real blocksize of fs */
833 sb_set_blocksize(sb, (ulong) befs_sb->block_size);
834 sb->s_op = &befs_sops;
835 root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
838 goto unacquire_priv_sbp;
840 sb->s_root = d_make_root(root);
842 befs_error(sb, "get root inode failed");
843 goto unacquire_priv_sbp;
846 /* load nls library */
847 if (befs_sb->mount_opts.iocharset) {
848 befs_debug(sb, "Loading nls: %s",
849 befs_sb->mount_opts.iocharset);
850 befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
852 befs_warning(sb, "Cannot load nls %s"
853 " loading default nls",
854 befs_sb->mount_opts.iocharset);
855 befs_sb->nls = load_nls_default();
857 /* load default nls if none is specified in mount options */
859 befs_debug(sb, "Loading default nls");
860 befs_sb->nls = load_nls_default();
869 kfree(befs_sb->mount_opts.iocharset);
870 kfree(sb->s_fs_info);
873 sb->s_fs_info = NULL;
878 befs_remount(struct super_block *sb, int *flags, char *data)
881 if (!(*flags & MS_RDONLY))
887 befs_statfs(struct dentry *dentry, struct kstatfs *buf)
889 struct super_block *sb = dentry->d_sb;
890 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
892 befs_debug(sb, "---> %s", __func__);
894 buf->f_type = BEFS_SUPER_MAGIC;
895 buf->f_bsize = sb->s_blocksize;
896 buf->f_blocks = BEFS_SB(sb)->num_blocks;
897 buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks;
898 buf->f_bavail = buf->f_bfree;
899 buf->f_files = 0; /* UNKNOWN */
900 buf->f_ffree = 0; /* UNKNOWN */
901 buf->f_fsid.val[0] = (u32)id;
902 buf->f_fsid.val[1] = (u32)(id >> 32);
903 buf->f_namelen = BEFS_NAME_LEN;
905 befs_debug(sb, "<--- %s", __func__);
910 static struct dentry *
911 befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name,
914 return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super);
917 static struct file_system_type befs_fs_type = {
918 .owner = THIS_MODULE,
921 .kill_sb = kill_block_super,
922 .fs_flags = FS_REQUIRES_DEV,
924 MODULE_ALIAS_FS("befs");
931 pr_info("version: %s\n", BEFS_VERSION);
933 err = befs_init_inodecache();
937 err = register_filesystem(&befs_fs_type);
939 goto unacquire_inodecache;
943 unacquire_inodecache:
944 befs_destroy_inodecache();
953 befs_destroy_inodecache();
955 unregister_filesystem(&befs_fs_type);
959 Macros that typecheck the init and exit functions,
960 ensures that they are called at init and cleanup,
961 and eliminates warnings about unused functions.
963 module_init(init_befs_fs)
964 module_exit(exit_befs_fs)