2 * linux/fs/befs/linuxvfs.c
4 * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com
8 #include <linux/module.h>
9 #include <linux/slab.h>
11 #include <linux/errno.h>
12 #include <linux/stat.h>
13 #include <linux/nls.h>
14 #include <linux/buffer_head.h>
15 #include <linux/vfs.h>
16 #include <linux/parser.h>
17 #include <linux/namei.h>
22 #include "datastream.h"
26 MODULE_DESCRIPTION("BeOS File System (BeFS) driver");
27 MODULE_AUTHOR("Will Dyson");
28 MODULE_LICENSE("GPL");
30 /* The units the vfs expects inode->i_blocks to be in */
31 #define VFS_BLOCK_SIZE 512
33 static int befs_readdir(struct file *, void *, filldir_t);
34 static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int);
35 static int befs_readpage(struct file *file, struct page *page);
36 static sector_t befs_bmap(struct address_space *mapping, sector_t block);
37 static struct dentry *befs_lookup(struct inode *, struct dentry *, struct nameidata *);
38 static void befs_read_inode(struct inode *ino);
39 static struct inode *befs_alloc_inode(struct super_block *sb);
40 static void befs_destroy_inode(struct inode *inode);
41 static int befs_init_inodecache(void);
42 static void befs_destroy_inodecache(void);
43 static void *befs_follow_link(struct dentry *, struct nameidata *);
44 static void befs_put_link(struct dentry *, struct nameidata *, void *);
45 static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
46 char **out, int *out_len);
47 static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
48 char **out, int *out_len);
49 static void befs_put_super(struct super_block *);
50 static int befs_remount(struct super_block *, int *, char *);
51 static int befs_statfs(struct dentry *, struct kstatfs *);
52 static int parse_options(char *, befs_mount_options *);
54 static const struct super_operations befs_sops = {
55 .read_inode = befs_read_inode, /* initialize & read inode */
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,
63 /* slab cache for befs_inode_info objects */
64 static struct kmem_cache *befs_inode_cachep;
66 static const struct file_operations befs_dir_operations = {
67 .read = generic_read_dir,
68 .readdir = befs_readdir,
71 static struct inode_operations befs_dir_inode_operations = {
72 .lookup = befs_lookup,
75 static const struct address_space_operations befs_aops = {
76 .readpage = befs_readpage,
77 .sync_page = block_sync_page,
81 static struct inode_operations befs_symlink_inode_operations = {
82 .readlink = generic_readlink,
83 .follow_link = befs_follow_link,
84 .put_link = befs_put_link,
88 * Called by generic_file_read() to read a page of data
90 * In turn, simply calls a generic block read function and
91 * passes it the address of befs_get_block, for mapping file
92 * positions to disk blocks.
95 befs_readpage(struct file *file, struct page *page)
97 return block_read_full_page(page, befs_get_block);
101 befs_bmap(struct address_space *mapping, sector_t block)
103 return generic_block_bmap(mapping, block, befs_get_block);
107 * Generic function to map a file position (block) to a
108 * disk offset (passed back in bh_result).
110 * Used by many higher level functions.
112 * Calls befs_fblock2brun() in datastream.c to do the real work.
118 befs_get_block(struct inode *inode, sector_t block,
119 struct buffer_head *bh_result, int create)
121 struct super_block *sb = inode->i_sb;
122 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
123 befs_block_run run = BAD_IADDR;
127 befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld",
128 inode->i_ino, block);
131 befs_error(sb, "befs_get_block() was asked for a block "
132 "number less than zero: block %ld in inode %lu",
133 block, inode->i_ino);
138 befs_error(sb, "befs_get_block() was asked to write to "
139 "block %ld in inode %lu", block, inode->i_ino);
143 res = befs_fblock2brun(sb, ds, block, &run);
144 if (res != BEFS_OK) {
146 "<--- befs_get_block() for inode %lu, block "
147 "%ld ERROR", inode->i_ino, block);
151 disk_off = (ulong) iaddr2blockno(sb, &run);
153 map_bh(bh_result, inode->i_sb, disk_off);
155 befs_debug(sb, "<--- befs_get_block() for inode %lu, block %ld, "
156 "disk address %lu", inode->i_ino, block, disk_off);
161 static struct dentry *
162 befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
164 struct inode *inode = NULL;
165 struct super_block *sb = dir->i_sb;
166 befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
171 const char *name = dentry->d_name.name;
173 befs_debug(sb, "---> befs_lookup() "
174 "name %s inode %ld", dentry->d_name.name, dir->i_ino);
176 /* Convert to UTF-8 */
177 if (BEFS_SB(sb)->nls) {
179 befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen);
181 befs_debug(sb, "<--- befs_lookup() ERROR");
184 ret = befs_btree_find(sb, ds, utfname, &offset);
188 ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset);
191 if (ret == BEFS_BT_NOT_FOUND) {
192 befs_debug(sb, "<--- befs_lookup() %s not found",
193 dentry->d_name.name);
194 return ERR_PTR(-ENOENT);
196 } else if (ret != BEFS_OK || offset == 0) {
197 befs_warning(sb, "<--- befs_lookup() Error");
198 return ERR_PTR(-ENODATA);
201 inode = iget(dir->i_sb, (ino_t) offset);
203 return ERR_PTR(-EACCES);
205 d_add(dentry, inode);
207 befs_debug(sb, "<--- befs_lookup()");
213 befs_readdir(struct file *filp, void *dirent, filldir_t filldir)
215 struct inode *inode = filp->f_path.dentry->d_inode;
216 struct super_block *sb = inode->i_sb;
217 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
221 unsigned char d_type;
222 char keybuf[BEFS_NAME_LEN + 1];
225 const char *dirname = filp->f_path.dentry->d_name.name;
227 befs_debug(sb, "---> befs_readdir() "
228 "name %s, inode %ld, filp->f_pos %Ld",
229 dirname, inode->i_ino, filp->f_pos);
231 result = befs_btree_read(sb, ds, filp->f_pos, BEFS_NAME_LEN + 1,
232 keybuf, &keysize, &value);
234 if (result == BEFS_ERR) {
235 befs_debug(sb, "<--- befs_readdir() ERROR");
236 befs_error(sb, "IO error reading %s (inode %lu)",
237 dirname, inode->i_ino);
240 } else if (result == BEFS_BT_END) {
241 befs_debug(sb, "<--- befs_readdir() END");
244 } else if (result == BEFS_BT_EMPTY) {
245 befs_debug(sb, "<--- befs_readdir() Empty directory");
252 if (BEFS_SB(sb)->nls) {
254 befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen);
256 befs_debug(sb, "<--- befs_readdir() ERROR");
259 result = filldir(dirent, nlsname, nlsnamelen, filp->f_pos,
260 (ino_t) value, d_type);
264 result = filldir(dirent, keybuf, keysize, filp->f_pos,
265 (ino_t) value, d_type);
270 befs_debug(sb, "<--- befs_readdir() filp->f_pos %Ld", filp->f_pos);
275 static struct inode *
276 befs_alloc_inode(struct super_block *sb)
278 struct befs_inode_info *bi;
279 bi = (struct befs_inode_info *)kmem_cache_alloc(befs_inode_cachep,
283 return &bi->vfs_inode;
287 befs_destroy_inode(struct inode *inode)
289 kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
292 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
294 struct befs_inode_info *bi = (struct befs_inode_info *) foo;
296 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
297 SLAB_CTOR_CONSTRUCTOR) {
298 inode_init_once(&bi->vfs_inode);
303 befs_read_inode(struct inode *inode)
305 struct buffer_head *bh = NULL;
306 befs_inode *raw_inode = NULL;
308 struct super_block *sb = inode->i_sb;
309 befs_sb_info *befs_sb = BEFS_SB(sb);
310 befs_inode_info *befs_ino = NULL;
312 befs_debug(sb, "---> befs_read_inode() " "inode = %lu", inode->i_ino);
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 : (uid_t) fs32_to_cpu(sb, raw_inode->uid);
348 inode->i_gid = befs_sb->mount_opts.use_gid ?
349 befs_sb->mount_opts.gid : (gid_t) fs32_to_cpu(sb, raw_inode->gid);
354 * BEFS's time is 64 bits, but current VFS is 32 bits...
355 * BEFS don't have access time. Nor inode change time. VFS
356 * doesn't have creation time.
357 * Also, the lower 16 bits of the last_modified_time and
358 * create_time are just a counter to help ensure uniqueness
359 * for indexing purposes. (PFD, page 54)
362 inode->i_mtime.tv_sec =
363 fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16;
364 inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */
365 inode->i_ctime = inode->i_mtime;
366 inode->i_atime = inode->i_mtime;
368 befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num);
369 befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent);
370 befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes);
371 befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags);
373 if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){
375 inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE;
376 strncpy(befs_ino->i_data.symlink, raw_inode->data.symlink,
381 befs_ino->i_data.ds =
382 fsds_to_cpu(sb, raw_inode->data.datastream);
384 num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds);
386 num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE);
387 inode->i_size = befs_ino->i_data.ds.size;
390 inode->i_mapping->a_ops = &befs_aops;
392 if (S_ISREG(inode->i_mode)) {
393 inode->i_fop = &generic_ro_fops;
394 } else if (S_ISDIR(inode->i_mode)) {
395 inode->i_op = &befs_dir_inode_operations;
396 inode->i_fop = &befs_dir_operations;
397 } else if (S_ISLNK(inode->i_mode)) {
398 inode->i_op = &befs_symlink_inode_operations;
400 befs_error(sb, "Inode %lu is not a regular file, "
401 "directory or symlink. THAT IS WRONG! BeFS has no "
402 "on disk special files", inode->i_ino);
407 befs_debug(sb, "<--- befs_read_inode()");
414 make_bad_inode(inode);
415 befs_debug(sb, "<--- befs_read_inode() - Bad inode");
419 /* Initialize the inode cache. Called at fs setup.
421 * Taken from NFS implementation by Al Viro.
424 befs_init_inodecache(void)
426 befs_inode_cachep = kmem_cache_create("befs_inode_cache",
427 sizeof (struct befs_inode_info),
428 0, (SLAB_RECLAIM_ACCOUNT|
431 if (befs_inode_cachep == NULL) {
432 printk(KERN_ERR "befs_init_inodecache: "
433 "Couldn't initalize inode slabcache\n");
440 /* Called at fs teardown.
442 * Taken from NFS implementation by Al Viro.
445 befs_destroy_inodecache(void)
447 kmem_cache_destroy(befs_inode_cachep);
451 * The inode of symbolic link is different to data stream.
452 * The data stream become link name. Unless the LONG_SYMLINK
456 befs_follow_link(struct dentry *dentry, struct nameidata *nd)
458 befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
461 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
462 struct super_block *sb = dentry->d_sb;
463 befs_data_stream *data = &befs_ino->i_data.ds;
464 befs_off_t len = data->size;
466 befs_debug(sb, "Follow long symlink");
468 link = kmalloc(len, GFP_NOFS);
470 link = ERR_PTR(-ENOMEM);
471 } else if (befs_read_lsymlink(sb, data, link, len) != len) {
473 befs_error(sb, "Failed to read entire long symlink");
474 link = ERR_PTR(-EIO);
477 link = befs_ino->i_data.symlink;
480 nd_set_link(nd, link);
484 static void befs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
486 befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
487 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
488 char *p = nd_get_link(nd);
495 * UTF-8 to NLS charset convert routine
498 * Changed 8/10/01 by Will Dyson. Now use uni2char() / char2uni() rather than
499 * the nls tables directly
503 befs_utf2nls(struct super_block *sb, const char *in,
504 int in_len, char **out, int *out_len)
506 struct nls_table *nls = BEFS_SB(sb)->nls;
511 /* The utf8->nls conversion won't make the final nls string bigger
512 * than the utf one, but if the string is pure ascii they'll have the
513 * same width and an extra char is needed to save the additional \0
515 int maxlen = in_len + 1;
517 befs_debug(sb, "---> utf2nls()");
520 befs_error(sb, "befs_utf2nls called with no NLS table loaded");
524 *out = result = kmalloc(maxlen, GFP_NOFS);
526 befs_error(sb, "befs_utf2nls() cannot allocate memory");
531 for (i = o = 0; i < in_len; i += utflen, o += unilen) {
533 /* convert from UTF-8 to Unicode */
534 utflen = utf8_mbtowc(&uni, &in[i], in_len - i);
539 /* convert from Unicode to nls */
540 unilen = nls->uni2char(uni, &result[o], in_len - o);
548 befs_debug(sb, "<--- utf2nls()");
553 befs_error(sb, "Name using character set %s contains a character that "
554 "cannot be converted to unicode.", nls->charset);
555 befs_debug(sb, "<--- utf2nls()");
561 * befs_nls2utf - Convert NLS string to utf8 encodeing
563 * @src: Input string buffer in NLS format
564 * @srclen: Length of input string in bytes
565 * @dest: The output string in UTF-8 format
566 * @destlen: Length of the output buffer
568 * Converts input string @src, which is in the format of the loaded NLS map,
569 * into a utf8 string.
571 * The destination string @dest is allocated by this function and the caller is
572 * responsible for freeing it with kfree()
574 * On return, *@destlen is the length of @dest in bytes.
576 * On success, the return value is the number of utf8 characters written to
577 * the output buffer @dest.
579 * On Failure, a negative number coresponding to the error code is returned.
583 befs_nls2utf(struct super_block *sb, const char *in,
584 int in_len, char **out, int *out_len)
586 struct nls_table *nls = BEFS_SB(sb)->nls;
591 /* There're nls characters that will translate to 3-chars-wide UTF-8
592 * characters, a additional byte is needed to save the final \0
593 * in special cases */
594 int maxlen = (3 * in_len) + 1;
596 befs_debug(sb, "---> nls2utf()\n");
599 befs_error(sb, "befs_nls2utf called with no NLS table loaded.");
603 *out = result = kmalloc(maxlen, GFP_NOFS);
605 befs_error(sb, "befs_nls2utf() cannot allocate memory");
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);
618 /* convert from unicode to UTF-8 */
619 utflen = utf8_wctomb(&result[o], uni, 3);
628 befs_debug(sb, "<--- nls2utf()");
633 befs_error(sb, "Name using charecter set %s contains a charecter that "
634 "cannot be converted to unicode.", nls->charset);
635 befs_debug(sb, "<--- nls2utf()");
645 Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
648 static match_table_t befs_tokens = {
651 {Opt_charset, "iocharset=%s"},
652 {Opt_debug, "debug"},
657 parse_options(char *options, befs_mount_options * opts)
660 substring_t args[MAX_OPT_ARGS];
663 /* Initialize options */
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))
685 printk(KERN_ERR "BeFS: Invalid uid %d, "
686 "using default\n", option);
693 if (match_int(&args[0], &option))
696 printk(KERN_ERR "BeFS: Invalid gid %d, "
697 "using default\n", option);
704 kfree(opts->iocharset);
705 opts->iocharset = match_strdup(&args[0]);
706 if (!opts->iocharset) {
707 printk(KERN_ERR "BeFS: allocation failure for "
708 "iocharset string\n");
716 printk(KERN_ERR "BeFS: Unrecognized mount option \"%s\" "
717 "or missing value\n", p);
724 /* This function has the responsibiltiy of getting the
725 * filesystem ready for unmounting.
726 * Basicly, we free everything that we allocated in
730 befs_put_super(struct super_block *sb)
732 kfree(BEFS_SB(sb)->mount_opts.iocharset);
733 BEFS_SB(sb)->mount_opts.iocharset = NULL;
735 if (BEFS_SB(sb)->nls) {
736 unload_nls(BEFS_SB(sb)->nls);
737 BEFS_SB(sb)->nls = NULL;
740 kfree(sb->s_fs_info);
741 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 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 sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
763 if (sb->s_fs_info == NULL) {
765 "BeFS(%s): Unable to allocate memory for private "
766 "portion of superblock. Bailing.\n", sb->s_id);
769 befs_sb = BEFS_SB(sb);
770 memset(befs_sb, 0, sizeof(befs_sb_info));
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, "---> befs_fill_super()");
779 #ifndef CONFIG_BEFS_RW
780 if (!(sb->s_flags & MS_RDONLY)) {
782 "No write support. Marking filesystem read-only");
783 sb->s_flags |= MS_RDONLY;
785 #endif /* CONFIG_BEFS_RW */
788 * Set dummy blocksize to read super block.
789 * Will be set to real fs blocksize later.
791 * Linux 2.4.10 and later refuse to read blocks smaller than
792 * the hardsect size for the device. But we also need to read at
793 * least 1k to get the second 512 bytes of the volume.
796 sb_min_blocksize(sb, 1024);
798 if (!(bh = sb_bread(sb, sb_block))) {
799 befs_error(sb, "unable to read superblock");
800 goto unacquire_priv_sbp;
803 /* account for offset of super block on x86 */
804 disk_sb = (befs_super_block *) bh->b_data;
805 if ((le32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1) ||
806 (be32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1)) {
807 befs_debug(sb, "Using PPC superblock location");
809 befs_debug(sb, "Using x86 superblock location");
811 (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
814 if (befs_load_sb(sb, disk_sb) != BEFS_OK)
817 befs_dump_super_block(sb, disk_sb);
821 if (befs_check_sb(sb) != BEFS_OK)
822 goto unacquire_priv_sbp;
824 if( befs_sb->num_blocks > ~((sector_t)0) ) {
825 befs_error(sb, "blocks count: %Lu "
826 "is larger than the host can use",
827 befs_sb->num_blocks);
828 goto unacquire_priv_sbp;
832 * set up enough so that it can read an inode
833 * Fill in kernel superblock fields from private sb
835 sb->s_magic = BEFS_SUPER_MAGIC;
836 /* Set real blocksize of fs */
837 sb_set_blocksize(sb, (ulong) befs_sb->block_size);
838 sb->s_op = (struct super_operations *) &befs_sops;
839 root = iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
840 sb->s_root = d_alloc_root(root);
843 befs_error(sb, "get root inode failed");
844 goto unacquire_priv_sbp;
847 /* load nls library */
848 if (befs_sb->mount_opts.iocharset) {
849 befs_debug(sb, "Loading nls: %s",
850 befs_sb->mount_opts.iocharset);
851 befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
853 befs_warning(sb, "Cannot load nls %s"
854 " loading default nls",
855 befs_sb->mount_opts.iocharset);
856 befs_sb->nls = load_nls_default();
858 /* load default nls if none is specified in mount options */
860 befs_debug(sb, "Loading default nls");
861 befs_sb->nls = load_nls_default();
870 kfree(sb->s_fs_info);
873 sb->s_fs_info = NULL;
878 befs_remount(struct super_block *sb, int *flags, char *data)
880 if (!(*flags & MS_RDONLY))
886 befs_statfs(struct dentry *dentry, struct kstatfs *buf)
888 struct super_block *sb = dentry->d_sb;
890 befs_debug(sb, "---> befs_statfs()");
892 buf->f_type = BEFS_SUPER_MAGIC;
893 buf->f_bsize = sb->s_blocksize;
894 buf->f_blocks = BEFS_SB(sb)->num_blocks;
895 buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks;
896 buf->f_bavail = buf->f_bfree;
897 buf->f_files = 0; /* UNKNOWN */
898 buf->f_ffree = 0; /* UNKNOWN */
899 buf->f_namelen = BEFS_NAME_LEN;
901 befs_debug(sb, "<--- befs_statfs()");
907 befs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name,
908 void *data, struct vfsmount *mnt)
910 return get_sb_bdev(fs_type, flags, dev_name, data, befs_fill_super,
914 static struct file_system_type befs_fs_type = {
915 .owner = THIS_MODULE,
917 .get_sb = befs_get_sb,
918 .kill_sb = kill_block_super,
919 .fs_flags = FS_REQUIRES_DEV,
927 printk(KERN_INFO "BeFS version: %s\n", BEFS_VERSION);
929 err = befs_init_inodecache();
933 err = register_filesystem(&befs_fs_type);
935 goto unacquire_inodecache;
939 unacquire_inodecache:
940 befs_destroy_inodecache();
949 befs_destroy_inodecache();
951 unregister_filesystem(&befs_fs_type);
955 Macros that typecheck the init and exit functions,
956 ensures that they are called at init and cleanup,
957 and eliminates warnings about unused functions.
959 module_init(init_befs_fs)
960 module_exit(exit_befs_fs)