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>
21 #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 int befs_readlink(struct dentry *, char __user *, int);
44 static int befs_follow_link(struct dentry *, struct nameidata *nd);
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 super_block *, 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 kmem_cache_t *befs_inode_cachep;
66 struct file_operations befs_dir_operations = {
67 .read = generic_read_dir,
68 .readdir = befs_readdir,
71 struct inode_operations befs_dir_inode_operations = {
72 .lookup = befs_lookup,
75 struct file_operations befs_file_operations = {
76 .llseek = default_llseek,
77 .read = generic_file_read,
78 .mmap = generic_file_readonly_mmap,
81 struct address_space_operations befs_aops = {
82 .readpage = befs_readpage,
83 .sync_page = block_sync_page,
87 static struct inode_operations befs_symlink_inode_operations = {
88 .readlink = befs_readlink,
89 .follow_link = befs_follow_link,
93 * Called by generic_file_read() to read a page of data
95 * In turn, simply calls a generic block read function and
96 * passes it the address of befs_get_block, for mapping file
97 * positions to disk blocks.
100 befs_readpage(struct file *file, struct page *page)
102 return block_read_full_page(page, befs_get_block);
106 befs_bmap(struct address_space *mapping, sector_t block)
108 return generic_block_bmap(mapping, block, befs_get_block);
112 * Generic function to map a file position (block) to a
113 * disk offset (passed back in bh_result).
115 * Used by many higher level functions.
117 * Calls befs_fblock2brun() in datastream.c to do the real work.
123 befs_get_block(struct inode *inode, sector_t block,
124 struct buffer_head *bh_result, int create)
126 struct super_block *sb = inode->i_sb;
127 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
128 befs_block_run run = BAD_IADDR;
132 befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld",
133 inode->i_ino, block);
136 befs_error(sb, "befs_get_block() was asked for a block "
137 "number less than zero: block %ld in inode %lu",
138 block, inode->i_ino);
143 befs_error(sb, "befs_get_block() was asked to write to "
144 "block %ld in inode %lu", block, inode->i_ino);
148 res = befs_fblock2brun(sb, ds, block, &run);
149 if (res != BEFS_OK) {
151 "<--- befs_get_block() for inode %lu, block "
152 "%ld ERROR", inode->i_ino, block);
156 disk_off = (ulong) iaddr2blockno(sb, &run);
158 map_bh(bh_result, inode->i_sb, disk_off);
160 befs_debug(sb, "<--- befs_get_block() for inode %lu, block %ld, "
161 "disk address %lu", inode->i_ino, block, disk_off);
166 static struct dentry *
167 befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
169 struct inode *inode = NULL;
170 struct super_block *sb = dir->i_sb;
171 befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
176 const char *name = dentry->d_name.name;
178 befs_debug(sb, "---> befs_lookup() "
179 "name %s inode %ld", dentry->d_name.name, dir->i_ino);
181 /* Convert to UTF-8 */
182 if (BEFS_SB(sb)->nls) {
184 befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen);
186 befs_debug(sb, "<--- befs_lookup() ERROR");
189 ret = befs_btree_find(sb, ds, utfname, &offset);
193 ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset);
196 if (ret == BEFS_BT_NOT_FOUND) {
197 befs_debug(sb, "<--- befs_lookup() %s not found",
198 dentry->d_name.name);
199 return ERR_PTR(-ENOENT);
201 } else if (ret != BEFS_OK || offset == 0) {
202 befs_warning(sb, "<--- befs_lookup() Error");
203 return ERR_PTR(-ENODATA);
206 inode = iget(dir->i_sb, (ino_t) offset);
208 return ERR_PTR(-EACCES);
210 d_add(dentry, inode);
212 befs_debug(sb, "<--- befs_lookup()");
218 befs_readdir(struct file *filp, void *dirent, filldir_t filldir)
220 struct inode *inode = filp->f_dentry->d_inode;
221 struct super_block *sb = inode->i_sb;
222 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
226 unsigned char d_type;
227 char keybuf[BEFS_NAME_LEN + 1];
230 const char *dirname = filp->f_dentry->d_name.name;
232 befs_debug(sb, "---> befs_readdir() "
233 "name %s, inode %ld, filp->f_pos %Ld",
234 dirname, inode->i_ino, filp->f_pos);
236 result = befs_btree_read(sb, ds, filp->f_pos, BEFS_NAME_LEN + 1,
237 keybuf, &keysize, &value);
239 if (result == BEFS_ERR) {
240 befs_debug(sb, "<--- befs_readdir() ERROR");
241 befs_error(sb, "IO error reading %s (inode %lu)",
242 dirname, inode->i_ino);
245 } else if (result == BEFS_BT_END) {
246 befs_debug(sb, "<--- befs_readdir() END");
249 } else if (result == BEFS_BT_EMPTY) {
250 befs_debug(sb, "<--- befs_readdir() Empty directory");
257 if (BEFS_SB(sb)->nls) {
259 befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen);
261 befs_debug(sb, "<--- befs_readdir() ERROR");
264 result = filldir(dirent, nlsname, nlsnamelen, filp->f_pos,
265 (ino_t) value, d_type);
269 result = filldir(dirent, keybuf, keysize, filp->f_pos,
270 (ino_t) value, d_type);
275 befs_debug(sb, "<--- befs_readdir() filp->f_pos %Ld", filp->f_pos);
280 static struct inode *
281 befs_alloc_inode(struct super_block *sb)
283 struct befs_inode_info *bi;
284 bi = (struct befs_inode_info *)kmem_cache_alloc(befs_inode_cachep,
288 return &bi->vfs_inode;
292 befs_destroy_inode(struct inode *inode)
294 kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
297 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
299 struct befs_inode_info *bi = (struct befs_inode_info *) foo;
301 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
302 SLAB_CTOR_CONSTRUCTOR) {
303 inode_init_once(&bi->vfs_inode);
308 befs_read_inode(struct inode *inode)
310 struct buffer_head *bh = NULL;
311 befs_inode *raw_inode = NULL;
313 struct super_block *sb = inode->i_sb;
314 befs_sb_info *befs_sb = BEFS_SB(sb);
315 befs_inode_info *befs_ino = NULL;
317 befs_debug(sb, "---> befs_read_inode() " "inode = %lu", inode->i_ino);
319 befs_ino = BEFS_I(inode);
321 /* convert from vfs's inode number to befs's inode number */
322 befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino);
324 befs_debug(sb, " real inode number [%u, %hu, %hu]",
325 befs_ino->i_inode_num.allocation_group,
326 befs_ino->i_inode_num.start, befs_ino->i_inode_num.len);
328 bh = befs_bread(sb, inode->i_ino);
330 befs_error(sb, "unable to read inode block - "
331 "inode = %lu", inode->i_ino);
335 raw_inode = (befs_inode *) bh->b_data;
337 befs_dump_inode(sb, raw_inode);
339 if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) {
340 befs_error(sb, "Bad inode: %lu", inode->i_ino);
344 inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode);
347 * set uid and gid. But since current BeOS is single user OS, so
348 * you can change by "uid" or "gid" options.
351 inode->i_uid = befs_sb->mount_opts.use_uid ?
352 befs_sb->mount_opts.uid : (uid_t) fs32_to_cpu(sb, raw_inode->uid);
353 inode->i_gid = befs_sb->mount_opts.use_gid ?
354 befs_sb->mount_opts.gid : (gid_t) fs32_to_cpu(sb, raw_inode->gid);
359 * BEFS's time is 64 bits, but current VFS is 32 bits...
360 * BEFS don't have access time. Nor inode change time. VFS
361 * doesn't have creation time.
362 * Also, the lower 16 bits of the last_modified_time and
363 * create_time are just a counter to help ensure uniqueness
364 * for indexing purposes. (PFD, page 54)
367 inode->i_mtime.tv_sec =
368 fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16;
369 inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */
370 inode->i_ctime = inode->i_mtime;
371 inode->i_atime = inode->i_mtime;
372 inode->i_blksize = befs_sb->block_size;
374 befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num);
375 befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent);
376 befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes);
377 befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags);
379 if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){
381 inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE;
382 strncpy(befs_ino->i_data.symlink, raw_inode->data.symlink,
387 befs_ino->i_data.ds =
388 fsds_to_cpu(sb, raw_inode->data.datastream);
390 num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds);
392 num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE);
393 inode->i_size = befs_ino->i_data.ds.size;
396 inode->i_mapping->a_ops = &befs_aops;
398 if (S_ISREG(inode->i_mode)) {
399 inode->i_fop = &befs_file_operations;
400 } else if (S_ISDIR(inode->i_mode)) {
401 inode->i_op = &befs_dir_inode_operations;
402 inode->i_fop = &befs_dir_operations;
403 } else if (S_ISLNK(inode->i_mode)) {
404 inode->i_op = &befs_symlink_inode_operations;
406 befs_error(sb, "Inode %lu is not a regular file, "
407 "directory or symlink. THAT IS WRONG! BeFS has no "
408 "on disk special files", inode->i_ino);
413 befs_debug(sb, "<--- befs_read_inode()");
420 make_bad_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_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
436 if (befs_inode_cachep == NULL) {
437 printk(KERN_ERR "befs_init_inodecache: "
438 "Couldn't initalize inode slabcache\n");
445 /* Called at fs teardown.
447 * Taken from NFS implementation by Al Viro.
450 befs_destroy_inodecache(void)
452 if (kmem_cache_destroy(befs_inode_cachep))
453 printk(KERN_ERR "befs_destroy_inodecache: "
454 "not all structures were freed\n");
458 * The inode of symbolic link is different to data stream.
459 * The data stream become link name. Unless the LONG_SYMLINK
463 befs_follow_link(struct dentry *dentry, struct nameidata *nd)
465 struct super_block *sb = dentry->d_sb;
466 befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
470 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
471 befs_data_stream *data = &befs_ino->i_data.ds;
472 befs_off_t linklen = data->size;
474 befs_debug(sb, "Follow long symlink");
476 link = kmalloc(linklen, GFP_NOFS);
480 if (befs_read_lsymlink(sb, data, link, linklen) != linklen) {
482 befs_error(sb, "Failed to read entire long symlink");
486 res = vfs_follow_link(nd, link);
490 link = befs_ino->i_data.symlink;
491 res = vfs_follow_link(nd, link);
498 befs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
500 struct super_block *sb = dentry->d_sb;
501 befs_inode_info *befs_ino = BEFS_I(dentry->d_inode);
505 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
506 befs_data_stream *data = &befs_ino->i_data.ds;
507 befs_off_t linklen = data->size;
509 befs_debug(sb, "Read long symlink");
511 link = kmalloc(linklen, GFP_NOFS);
515 if (befs_read_lsymlink(sb, data, link, linklen) != linklen) {
517 befs_error(sb, "Failed to read entire long symlink");
521 res = vfs_readlink(dentry, buffer, buflen, link);
525 link = befs_ino->i_data.symlink;
526 res = vfs_readlink(dentry, buffer, buflen, link);
533 * UTF-8 to NLS charset convert routine
536 * Changed 8/10/01 by Will Dyson. Now use uni2char() / char2uni() rather than
537 * the nls tables directly
541 befs_utf2nls(struct super_block *sb, const char *in,
542 int in_len, char **out, int *out_len)
544 struct nls_table *nls = BEFS_SB(sb)->nls;
549 int maxlen = in_len; /* The utf8->nls conversion can't make more chars */
551 befs_debug(sb, "---> utf2nls()");
554 befs_error(sb, "befs_utf2nls called with no NLS table loaded");
558 *out = result = kmalloc(maxlen, GFP_NOFS);
560 befs_error(sb, "befs_utf2nls() cannot allocate memory");
565 for (i = o = 0; i < in_len; i += utflen, o += unilen) {
567 /* convert from UTF-8 to Unicode */
568 utflen = utf8_mbtowc(&uni, &in[i], in_len - i);
573 /* convert from Unicode to nls */
574 unilen = nls->uni2char(uni, &result[o], in_len - o);
582 befs_debug(sb, "<--- utf2nls()");
587 befs_error(sb, "Name using character set %s contains a character that "
588 "cannot be converted to unicode.", nls->charset);
589 befs_debug(sb, "<--- utf2nls()");
595 * befs_nls2utf - Convert NLS string to utf8 encodeing
597 * @src: Input string buffer in NLS format
598 * @srclen: Length of input string in bytes
599 * @dest: The output string in UTF8 format
600 * @destlen: Length of the output buffer
602 * Converts input string @src, which is in the format of the loaded NLS map,
603 * into a utf8 string.
605 * The destination string @dest is allocated by this function and the caller is
606 * responsible for freeing it with kfree()
608 * On return, *@destlen is the length of @dest in bytes.
610 * On success, the return value is the number of utf8 characters written to
611 * the output buffer @dest.
613 * On Failure, a negative number coresponding to the error code is returned.
617 befs_nls2utf(struct super_block *sb, const char *in,
618 int in_len, char **out, int *out_len)
620 struct nls_table *nls = BEFS_SB(sb)->nls;
625 int maxlen = 3 * in_len;
627 befs_debug(sb, "---> nls2utf()\n");
630 befs_error(sb, "befs_nls2utf called with no NLS table loaded.");
634 *out = result = kmalloc(maxlen, GFP_NOFS);
636 befs_error(sb, "befs_nls2utf() cannot allocate memory");
641 for (i = o = 0; i < in_len; i += unilen, o += utflen) {
643 /* convert from nls to unicode */
644 unilen = nls->char2uni(&in[i], in_len - i, &uni);
649 /* convert from unicode to UTF-8 */
650 utflen = utf8_wctomb(&result[o], uni, 3);
659 befs_debug(sb, "<--- nls2utf()");
664 befs_error(sb, "Name using charecter set %s contains a charecter that "
665 "cannot be converted to unicode.", nls->charset);
666 befs_debug(sb, "<--- nls2utf()");
676 Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
679 static match_table_t befs_tokens = {
682 {Opt_charset, "iocharset=%s"},
683 {Opt_debug, "debug"},
688 parse_options(char *options, befs_mount_options * opts)
691 substring_t args[MAX_OPT_ARGS];
694 /* Initialize options */
699 opts->iocharset = NULL;
705 while ((p = strsep(&options, ",")) != NULL) {
710 token = match_token(p, befs_tokens, args);
713 if (match_int(&args[0], &option))
716 printk(KERN_ERR "BeFS: Invalid uid %d, "
717 "using default\n", option);
724 if (match_int(&args[0], &option))
727 printk(KERN_ERR "BeFS: Invalid gid %d, "
728 "using default\n", option);
735 kfree(opts->iocharset);
736 opts->iocharset = match_strdup(&args[0]);
737 if (!opts->iocharset) {
738 printk(KERN_ERR "BeFS: allocation failure for "
739 "iocharset string\n");
747 printk(KERN_ERR "BeFS: Unrecognized mount option \"%s\" "
748 "or missing value\n", p);
755 /* This function has the responsibiltiy of getting the
756 * filesystem ready for unmounting.
757 * Basicly, we free everything that we allocated in
761 befs_put_super(struct super_block *sb)
763 if (BEFS_SB(sb)->mount_opts.iocharset) {
764 kfree(BEFS_SB(sb)->mount_opts.iocharset);
765 BEFS_SB(sb)->mount_opts.iocharset = NULL;
768 if (BEFS_SB(sb)->nls) {
769 unload_nls(BEFS_SB(sb)->nls);
770 BEFS_SB(sb)->nls = NULL;
774 kfree(sb->s_fs_info);
775 sb->s_fs_info = NULL;
780 /* Allocate private field of the superblock, fill it.
782 * Finish filling the public superblock fields
783 * Make the root directory
784 * Load a set of NLS translations if needed.
787 befs_fill_super(struct super_block *sb, void *data, int silent)
789 struct buffer_head *bh;
790 befs_sb_info *befs_sb;
791 befs_super_block *disk_sb;
794 const unsigned long sb_block = 0;
795 const off_t x86_sb_off = 512;
797 sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
798 if (sb->s_fs_info == NULL) {
800 "BeFS(%s): Unable to allocate memory for private "
801 "portion of superblock. Bailing.\n", sb->s_id);
804 befs_sb = BEFS_SB(sb);
805 memset(befs_sb, 0, sizeof(befs_sb_info));
807 if (!parse_options((char *) data, &befs_sb->mount_opts)) {
808 befs_error(sb, "cannot parse mount options");
809 goto unaquire_priv_sbp;
812 befs_debug(sb, "---> befs_fill_super()");
814 #ifndef CONFIG_BEFS_RW
815 if (!(sb->s_flags & MS_RDONLY)) {
817 "No write support. Marking filesystem read-only");
818 sb->s_flags |= MS_RDONLY;
820 #endif /* CONFIG_BEFS_RW */
823 * Set dummy blocksize to read super block.
824 * Will be set to real fs blocksize later.
826 * Linux 2.4.10 and later refuse to read blocks smaller than
827 * the hardsect size for the device. But we also need to read at
828 * least 1k to get the second 512 bytes of the volume.
831 sb_min_blocksize(sb, 1024);
833 if (!(bh = sb_bread(sb, sb_block))) {
834 befs_error(sb, "unable to read superblock");
835 goto unaquire_priv_sbp;
838 /* account for offset of super block on x86 */
839 disk_sb = (befs_super_block *) bh->b_data;
840 if ((le32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1) ||
841 (be32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1)) {
842 befs_debug(sb, "Using PPC superblock location");
844 befs_debug(sb, "Using x86 superblock location");
846 (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
849 if (befs_load_sb(sb, disk_sb) != BEFS_OK)
852 befs_dump_super_block(sb, disk_sb);
856 if (befs_check_sb(sb) != BEFS_OK)
857 goto unaquire_priv_sbp;
859 if( befs_sb->num_blocks > ~((sector_t)0) ) {
860 befs_error(sb, "blocks count: %Lu "
861 "is larger than the host can use",
862 befs_sb->num_blocks);
863 goto unaquire_priv_sbp;
867 * set up enough so that it can read an inode
868 * Fill in kernel superblock fields from private sb
870 sb->s_magic = BEFS_SUPER_MAGIC;
871 /* Set real blocksize of fs */
872 sb_set_blocksize(sb, (ulong) befs_sb->block_size);
873 sb->s_op = (struct super_operations *) &befs_sops;
874 root = iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
875 sb->s_root = d_alloc_root(root);
878 befs_error(sb, "get root inode failed");
879 goto unaquire_priv_sbp;
882 /* load nls library */
883 if (befs_sb->mount_opts.iocharset) {
884 befs_debug(sb, "Loading nls: %s",
885 befs_sb->mount_opts.iocharset);
886 befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
888 befs_warning(sb, "Cannot load nls %s"
889 "loding default nls",
890 befs_sb->mount_opts.iocharset);
891 befs_sb->nls = load_nls_default();
901 kfree(sb->s_fs_info);
904 sb->s_fs_info = NULL;
909 befs_remount(struct super_block *sb, int *flags, char *data)
911 if (!(*flags & MS_RDONLY))
917 befs_statfs(struct super_block *sb, struct kstatfs *buf)
920 befs_debug(sb, "---> befs_statfs()");
922 buf->f_type = BEFS_SUPER_MAGIC;
923 buf->f_bsize = sb->s_blocksize;
924 buf->f_blocks = BEFS_SB(sb)->num_blocks;
925 buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks;
926 buf->f_bavail = buf->f_bfree;
927 buf->f_files = 0; /* UNKNOWN */
928 buf->f_ffree = 0; /* UNKNOWN */
929 buf->f_namelen = BEFS_NAME_LEN;
931 befs_debug(sb, "<--- befs_statfs()");
936 static struct super_block *
937 befs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name,
940 return get_sb_bdev(fs_type, flags, dev_name, data, befs_fill_super);
943 static struct file_system_type befs_fs_type = {
944 .owner = THIS_MODULE,
946 .get_sb = befs_get_sb,
947 .kill_sb = kill_block_super,
948 .fs_flags = FS_REQUIRES_DEV,
956 printk(KERN_INFO "BeFS version: %s\n", BEFS_VERSION);
958 err = befs_init_inodecache();
962 err = register_filesystem(&befs_fs_type);
964 goto unaquire_inodecache;
969 befs_destroy_inodecache();
978 befs_destroy_inodecache();
980 unregister_filesystem(&befs_fs_type);
984 Macros that typecheck the init and exit functions,
985 ensures that they are called at init and cleanup,
986 and eliminates warnings about unused functions.
988 module_init(init_befs_fs)
989 module_exit(exit_befs_fs)