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 struct inode *befs_iget(struct super_block *, unsigned long);
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 .alloc_inode = befs_alloc_inode, /* allocate a new inode */
56 .destroy_inode = befs_destroy_inode, /* deallocate an inode */
57 .put_super = befs_put_super, /* uninit super */
58 .statfs = befs_statfs, /* statfs */
59 .remount_fs = befs_remount,
60 .show_options = generic_show_options,
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,
69 .llseek = generic_file_llseek,
72 static const struct inode_operations befs_dir_inode_operations = {
73 .lookup = befs_lookup,
76 static const struct address_space_operations befs_aops = {
77 .readpage = befs_readpage,
78 .sync_page = block_sync_page,
82 static const struct inode_operations befs_symlink_inode_operations = {
83 .readlink = generic_readlink,
84 .follow_link = befs_follow_link,
85 .put_link = befs_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 inode->i_ino, block);
132 befs_error(sb, "befs_get_block() was asked for a block "
133 "number less than zero: block %ld in inode %lu",
134 block, inode->i_ino);
139 befs_error(sb, "befs_get_block() was asked to write to "
140 "block %ld in inode %lu", block, inode->i_ino);
144 res = befs_fblock2brun(sb, ds, block, &run);
145 if (res != BEFS_OK) {
147 "<--- befs_get_block() for inode %lu, block "
148 "%ld ERROR", inode->i_ino, block);
152 disk_off = (ulong) iaddr2blockno(sb, &run);
154 map_bh(bh_result, inode->i_sb, disk_off);
156 befs_debug(sb, "<--- befs_get_block() for inode %lu, block %ld, "
157 "disk address %lu", inode->i_ino, block, disk_off);
162 static struct dentry *
163 befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
165 struct inode *inode = NULL;
166 struct super_block *sb = dir->i_sb;
167 befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
172 const char *name = dentry->d_name.name;
174 befs_debug(sb, "---> befs_lookup() "
175 "name %s inode %ld", dentry->d_name.name, dir->i_ino);
177 /* Convert to UTF-8 */
178 if (BEFS_SB(sb)->nls) {
180 befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen);
182 befs_debug(sb, "<--- befs_lookup() ERROR");
185 ret = befs_btree_find(sb, ds, utfname, &offset);
189 ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset);
192 if (ret == BEFS_BT_NOT_FOUND) {
193 befs_debug(sb, "<--- befs_lookup() %s not found",
194 dentry->d_name.name);
195 return ERR_PTR(-ENOENT);
197 } else if (ret != BEFS_OK || offset == 0) {
198 befs_warning(sb, "<--- befs_lookup() Error");
199 return ERR_PTR(-ENODATA);
202 inode = befs_iget(dir->i_sb, (ino_t) offset);
204 return ERR_CAST(inode);
206 d_add(dentry, inode);
208 befs_debug(sb, "<--- befs_lookup()");
214 befs_readdir(struct file *filp, void *dirent, filldir_t filldir)
216 struct inode *inode = filp->f_path.dentry->d_inode;
217 struct super_block *sb = inode->i_sb;
218 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
222 unsigned char d_type;
223 char keybuf[BEFS_NAME_LEN + 1];
226 const char *dirname = filp->f_path.dentry->d_name.name;
228 befs_debug(sb, "---> befs_readdir() "
229 "name %s, inode %ld, filp->f_pos %Ld",
230 dirname, inode->i_ino, filp->f_pos);
232 result = befs_btree_read(sb, ds, filp->f_pos, BEFS_NAME_LEN + 1,
233 keybuf, &keysize, &value);
235 if (result == BEFS_ERR) {
236 befs_debug(sb, "<--- befs_readdir() ERROR");
237 befs_error(sb, "IO error reading %s (inode %lu)",
238 dirname, inode->i_ino);
241 } else if (result == BEFS_BT_END) {
242 befs_debug(sb, "<--- befs_readdir() END");
245 } else if (result == BEFS_BT_EMPTY) {
246 befs_debug(sb, "<--- befs_readdir() Empty directory");
253 if (BEFS_SB(sb)->nls) {
255 befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen);
257 befs_debug(sb, "<--- befs_readdir() ERROR");
260 result = filldir(dirent, nlsname, nlsnamelen, filp->f_pos,
261 (ino_t) value, d_type);
265 result = filldir(dirent, keybuf, keysize, filp->f_pos,
266 (ino_t) value, d_type);
271 befs_debug(sb, "<--- befs_readdir() filp->f_pos %Ld", filp->f_pos);
276 static struct inode *
277 befs_alloc_inode(struct super_block *sb)
279 struct befs_inode_info *bi;
280 bi = (struct befs_inode_info *)kmem_cache_alloc(befs_inode_cachep,
284 return &bi->vfs_inode;
288 befs_destroy_inode(struct inode *inode)
290 kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
293 static void init_once(void *foo)
295 struct befs_inode_info *bi = (struct befs_inode_info *) foo;
297 inode_init_once(&bi->vfs_inode);
300 static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
302 struct buffer_head *bh = NULL;
303 befs_inode *raw_inode = NULL;
305 befs_sb_info *befs_sb = BEFS_SB(sb);
306 befs_inode_info *befs_ino = NULL;
310 befs_debug(sb, "---> befs_read_inode() " "inode = %lu", ino);
312 inode = iget_locked(sb, ino);
315 if (!(inode->i_state & I_NEW))
318 befs_ino = BEFS_I(inode);
320 /* convert from vfs's inode number to befs's inode number */
321 befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino);
323 befs_debug(sb, " real inode number [%u, %hu, %hu]",
324 befs_ino->i_inode_num.allocation_group,
325 befs_ino->i_inode_num.start, befs_ino->i_inode_num.len);
327 bh = befs_bread(sb, inode->i_ino);
329 befs_error(sb, "unable to read inode block - "
330 "inode = %lu", inode->i_ino);
334 raw_inode = (befs_inode *) bh->b_data;
336 befs_dump_inode(sb, raw_inode);
338 if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) {
339 befs_error(sb, "Bad inode: %lu", inode->i_ino);
343 inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode);
346 * set uid and gid. But since current BeOS is single user OS, so
347 * you can change by "uid" or "gid" options.
350 inode->i_uid = befs_sb->mount_opts.use_uid ?
351 befs_sb->mount_opts.uid : (uid_t) fs32_to_cpu(sb, raw_inode->uid);
352 inode->i_gid = befs_sb->mount_opts.use_gid ?
353 befs_sb->mount_opts.gid : (gid_t) fs32_to_cpu(sb, raw_inode->gid);
358 * BEFS's time is 64 bits, but current VFS is 32 bits...
359 * BEFS don't have access time. Nor inode change time. VFS
360 * doesn't have creation time.
361 * Also, the lower 16 bits of the last_modified_time and
362 * create_time are just a counter to help ensure uniqueness
363 * for indexing purposes. (PFD, page 54)
366 inode->i_mtime.tv_sec =
367 fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16;
368 inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */
369 inode->i_ctime = inode->i_mtime;
370 inode->i_atime = inode->i_mtime;
372 befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num);
373 befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent);
374 befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes);
375 befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags);
377 if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){
379 inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE;
380 strncpy(befs_ino->i_data.symlink, raw_inode->data.symlink,
381 BEFS_SYMLINK_LEN - 1);
382 befs_ino->i_data.symlink[BEFS_SYMLINK_LEN - 1] = '\0';
386 befs_ino->i_data.ds =
387 fsds_to_cpu(sb, raw_inode->data.datastream);
389 num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds);
391 num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE);
392 inode->i_size = befs_ino->i_data.ds.size;
395 inode->i_mapping->a_ops = &befs_aops;
397 if (S_ISREG(inode->i_mode)) {
398 inode->i_fop = &generic_ro_fops;
399 } else if (S_ISDIR(inode->i_mode)) {
400 inode->i_op = &befs_dir_inode_operations;
401 inode->i_fop = &befs_dir_operations;
402 } else if (S_ISLNK(inode->i_mode)) {
403 inode->i_op = &befs_symlink_inode_operations;
405 befs_error(sb, "Inode %lu is not a regular file, "
406 "directory or symlink. THAT IS WRONG! BeFS has no "
407 "on disk special files", inode->i_ino);
412 befs_debug(sb, "<--- befs_read_inode()");
413 unlock_new_inode(inode);
421 befs_debug(sb, "<--- befs_read_inode() - Bad inode");
425 /* Initialize the inode cache. Called at fs setup.
427 * Taken from NFS implementation by Al Viro.
430 befs_init_inodecache(void)
432 befs_inode_cachep = kmem_cache_create("befs_inode_cache",
433 sizeof (struct befs_inode_info),
434 0, (SLAB_RECLAIM_ACCOUNT|
437 if (befs_inode_cachep == NULL) {
438 printk(KERN_ERR "befs_init_inodecache: "
439 "Couldn't initalize inode slabcache\n");
446 /* Called at fs teardown.
448 * Taken from NFS implementation by Al Viro.
451 befs_destroy_inodecache(void)
453 kmem_cache_destroy(befs_inode_cachep);
457 * The inode of symbolic link is different to data stream.
458 * The data stream become link name. Unless the LONG_SYMLINK
462 befs_follow_link(struct dentry *dentry, struct nameidata *nd)
464 befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
467 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
468 struct super_block *sb = dentry->d_sb;
469 befs_data_stream *data = &befs_ino->i_data.ds;
470 befs_off_t len = data->size;
472 befs_debug(sb, "Follow long symlink");
474 link = kmalloc(len, GFP_NOFS);
476 link = ERR_PTR(-ENOMEM);
477 } else if (befs_read_lsymlink(sb, data, link, len) != len) {
479 befs_error(sb, "Failed to read entire long symlink");
480 link = ERR_PTR(-EIO);
482 link[len - 1] = '\0';
485 link = befs_ino->i_data.symlink;
488 nd_set_link(nd, link);
492 static void befs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
494 befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
495 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
496 char *link = nd_get_link(nd);
503 * UTF-8 to NLS charset convert routine
506 * Changed 8/10/01 by Will Dyson. Now use uni2char() / char2uni() rather than
507 * the nls tables directly
511 befs_utf2nls(struct super_block *sb, const char *in,
512 int in_len, char **out, int *out_len)
514 struct nls_table *nls = BEFS_SB(sb)->nls;
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
523 int maxlen = in_len + 1;
525 befs_debug(sb, "---> utf2nls()");
528 befs_error(sb, "befs_utf2nls called with no NLS table loaded");
532 *out = result = kmalloc(maxlen, GFP_NOFS);
534 befs_error(sb, "befs_utf2nls() cannot allocate memory");
539 for (i = o = 0; i < in_len; i += utflen, o += unilen) {
541 /* convert from UTF-8 to Unicode */
542 utflen = utf8_mbtowc(&uni, &in[i], in_len - i);
547 /* convert from Unicode to nls */
548 unilen = nls->uni2char(uni, &result[o], in_len - o);
556 befs_debug(sb, "<--- utf2nls()");
561 befs_error(sb, "Name using character set %s contains a character that "
562 "cannot be converted to unicode.", nls->charset);
563 befs_debug(sb, "<--- utf2nls()");
569 * befs_nls2utf - Convert NLS string to utf8 encodeing
571 * @src: Input string buffer in NLS format
572 * @srclen: Length of input string in bytes
573 * @dest: The output string in UTF-8 format
574 * @destlen: Length of the output buffer
576 * Converts input string @src, which is in the format of the loaded NLS map,
577 * into a utf8 string.
579 * The destination string @dest is allocated by this function and the caller is
580 * responsible for freeing it with kfree()
582 * On return, *@destlen is the length of @dest in bytes.
584 * On success, the return value is the number of utf8 characters written to
585 * the output buffer @dest.
587 * On Failure, a negative number coresponding to the error code is returned.
591 befs_nls2utf(struct super_block *sb, const char *in,
592 int in_len, char **out, int *out_len)
594 struct nls_table *nls = BEFS_SB(sb)->nls;
599 /* There're nls characters that will translate to 3-chars-wide UTF-8
600 * characters, a additional byte is needed to save the final \0
601 * in special cases */
602 int maxlen = (3 * in_len) + 1;
604 befs_debug(sb, "---> nls2utf()\n");
607 befs_error(sb, "befs_nls2utf called with no NLS table loaded.");
611 *out = result = kmalloc(maxlen, GFP_NOFS);
613 befs_error(sb, "befs_nls2utf() cannot allocate memory");
618 for (i = o = 0; i < in_len; i += unilen, o += utflen) {
620 /* convert from nls to unicode */
621 unilen = nls->char2uni(&in[i], in_len - i, &uni);
626 /* convert from unicode to UTF-8 */
627 utflen = utf8_wctomb(&result[o], uni, 3);
636 befs_debug(sb, "<--- nls2utf()");
641 befs_error(sb, "Name using charecter set %s contains a charecter that "
642 "cannot be converted to unicode.", nls->charset);
643 befs_debug(sb, "<--- nls2utf()");
653 Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
656 static const match_table_t befs_tokens = {
659 {Opt_charset, "iocharset=%s"},
660 {Opt_debug, "debug"},
665 parse_options(char *options, befs_mount_options * opts)
668 substring_t args[MAX_OPT_ARGS];
671 /* Initialize options */
676 opts->iocharset = NULL;
682 while ((p = strsep(&options, ",")) != NULL) {
687 token = match_token(p, befs_tokens, args);
690 if (match_int(&args[0], &option))
693 printk(KERN_ERR "BeFS: Invalid uid %d, "
694 "using default\n", option);
701 if (match_int(&args[0], &option))
704 printk(KERN_ERR "BeFS: Invalid gid %d, "
705 "using default\n", option);
712 kfree(opts->iocharset);
713 opts->iocharset = match_strdup(&args[0]);
714 if (!opts->iocharset) {
715 printk(KERN_ERR "BeFS: allocation failure for "
716 "iocharset string\n");
724 printk(KERN_ERR "BeFS: Unrecognized mount option \"%s\" "
725 "or missing value\n", p);
732 /* This function has the responsibiltiy of getting the
733 * filesystem ready for unmounting.
734 * Basicly, we free everything that we allocated in
738 befs_put_super(struct super_block *sb)
740 kfree(BEFS_SB(sb)->mount_opts.iocharset);
741 BEFS_SB(sb)->mount_opts.iocharset = NULL;
743 if (BEFS_SB(sb)->nls) {
744 unload_nls(BEFS_SB(sb)->nls);
745 BEFS_SB(sb)->nls = NULL;
748 kfree(sb->s_fs_info);
749 sb->s_fs_info = NULL;
753 /* Allocate private field of the superblock, fill it.
755 * Finish filling the public superblock fields
756 * Make the root directory
757 * Load a set of NLS translations if needed.
760 befs_fill_super(struct super_block *sb, void *data, int silent)
762 struct buffer_head *bh;
763 befs_sb_info *befs_sb;
764 befs_super_block *disk_sb;
767 const unsigned long sb_block = 0;
768 const off_t x86_sb_off = 512;
770 save_mount_options(sb, data);
772 sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
773 if (sb->s_fs_info == NULL) {
775 "BeFS(%s): Unable to allocate memory for private "
776 "portion of superblock. Bailing.\n", sb->s_id);
779 befs_sb = BEFS_SB(sb);
780 memset(befs_sb, 0, sizeof(befs_sb_info));
782 if (!parse_options((char *) data, &befs_sb->mount_opts)) {
783 befs_error(sb, "cannot parse mount options");
784 goto unacquire_priv_sbp;
787 befs_debug(sb, "---> befs_fill_super()");
789 #ifndef CONFIG_BEFS_RW
790 if (!(sb->s_flags & MS_RDONLY)) {
792 "No write support. Marking filesystem read-only");
793 sb->s_flags |= MS_RDONLY;
795 #endif /* CONFIG_BEFS_RW */
798 * Set dummy blocksize to read super block.
799 * Will be set to real fs blocksize later.
801 * Linux 2.4.10 and later refuse to read blocks smaller than
802 * the hardsect size for the device. But we also need to read at
803 * least 1k to get the second 512 bytes of the volume.
806 sb_min_blocksize(sb, 1024);
808 if (!(bh = sb_bread(sb, sb_block))) {
809 befs_error(sb, "unable to read superblock");
810 goto unacquire_priv_sbp;
813 /* account for offset of super block on x86 */
814 disk_sb = (befs_super_block *) bh->b_data;
815 if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) ||
816 (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) {
817 befs_debug(sb, "Using PPC superblock location");
819 befs_debug(sb, "Using x86 superblock location");
821 (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
824 if (befs_load_sb(sb, disk_sb) != BEFS_OK)
827 befs_dump_super_block(sb, disk_sb);
831 if (befs_check_sb(sb) != BEFS_OK)
832 goto unacquire_priv_sbp;
834 if( befs_sb->num_blocks > ~((sector_t)0) ) {
835 befs_error(sb, "blocks count: %Lu "
836 "is larger than the host can use",
837 befs_sb->num_blocks);
838 goto unacquire_priv_sbp;
842 * set up enough so that it can read an inode
843 * Fill in kernel superblock fields from private sb
845 sb->s_magic = BEFS_SUPER_MAGIC;
846 /* Set real blocksize of fs */
847 sb_set_blocksize(sb, (ulong) befs_sb->block_size);
848 sb->s_op = (struct super_operations *) &befs_sops;
849 root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
852 goto unacquire_priv_sbp;
854 sb->s_root = d_alloc_root(root);
857 befs_error(sb, "get root inode failed");
858 goto unacquire_priv_sbp;
861 /* load nls library */
862 if (befs_sb->mount_opts.iocharset) {
863 befs_debug(sb, "Loading nls: %s",
864 befs_sb->mount_opts.iocharset);
865 befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
867 befs_warning(sb, "Cannot load nls %s"
868 " loading default nls",
869 befs_sb->mount_opts.iocharset);
870 befs_sb->nls = load_nls_default();
872 /* load default nls if none is specified in mount options */
874 befs_debug(sb, "Loading default nls");
875 befs_sb->nls = load_nls_default();
884 kfree(sb->s_fs_info);
887 sb->s_fs_info = NULL;
892 befs_remount(struct super_block *sb, int *flags, char *data)
894 if (!(*flags & MS_RDONLY))
900 befs_statfs(struct dentry *dentry, struct kstatfs *buf)
902 struct super_block *sb = dentry->d_sb;
903 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
905 befs_debug(sb, "---> befs_statfs()");
907 buf->f_type = BEFS_SUPER_MAGIC;
908 buf->f_bsize = sb->s_blocksize;
909 buf->f_blocks = BEFS_SB(sb)->num_blocks;
910 buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks;
911 buf->f_bavail = buf->f_bfree;
912 buf->f_files = 0; /* UNKNOWN */
913 buf->f_ffree = 0; /* UNKNOWN */
914 buf->f_fsid.val[0] = (u32)id;
915 buf->f_fsid.val[1] = (u32)(id >> 32);
916 buf->f_namelen = BEFS_NAME_LEN;
918 befs_debug(sb, "<--- befs_statfs()");
924 befs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name,
925 void *data, struct vfsmount *mnt)
927 return get_sb_bdev(fs_type, flags, dev_name, data, befs_fill_super,
931 static struct file_system_type befs_fs_type = {
932 .owner = THIS_MODULE,
934 .get_sb = befs_get_sb,
935 .kill_sb = kill_block_super,
936 .fs_flags = FS_REQUIRES_DEV,
944 printk(KERN_INFO "BeFS version: %s\n", BEFS_VERSION);
946 err = befs_init_inodecache();
950 err = register_filesystem(&befs_fs_type);
952 goto unacquire_inodecache;
956 unacquire_inodecache:
957 befs_destroy_inodecache();
966 befs_destroy_inodecache();
968 unregister_filesystem(&befs_fs_type);
972 Macros that typecheck the init and exit functions,
973 ensures that they are called at init and cleanup,
974 and eliminates warnings about unused functions.
976 module_init(init_befs_fs)
977 module_exit(exit_befs_fs)