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>
21 #include <linux/cred.h>
22 #include <linux/exportfs.h>
23 #include <linux/seq_file.h>
28 #include "datastream.h"
32 MODULE_DESCRIPTION("BeOS File System (BeFS) driver");
33 MODULE_AUTHOR("Will Dyson");
34 MODULE_LICENSE("GPL");
36 /* The units the vfs expects inode->i_blocks to be in */
37 #define VFS_BLOCK_SIZE 512
39 static int befs_readdir(struct file *, struct dir_context *);
40 static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int);
41 static int befs_readpage(struct file *file, struct page *page);
42 static sector_t befs_bmap(struct address_space *mapping, sector_t block);
43 static struct dentry *befs_lookup(struct inode *, struct dentry *,
45 static struct inode *befs_iget(struct super_block *, unsigned long);
46 static struct inode *befs_alloc_inode(struct super_block *sb);
47 static void befs_free_inode(struct inode *inode);
48 static void befs_destroy_inodecache(void);
49 static int befs_symlink_readpage(struct file *, struct page *);
50 static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
51 char **out, int *out_len);
52 static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
53 char **out, int *out_len);
54 static void befs_put_super(struct super_block *);
55 static int befs_remount(struct super_block *, int *, char *);
56 static int befs_statfs(struct dentry *, struct kstatfs *);
57 static int befs_show_options(struct seq_file *, struct dentry *);
58 static int parse_options(char *, struct befs_mount_options *);
59 static struct dentry *befs_fh_to_dentry(struct super_block *sb,
60 struct fid *fid, int fh_len, int fh_type);
61 static struct dentry *befs_fh_to_parent(struct super_block *sb,
62 struct fid *fid, int fh_len, int fh_type);
63 static struct dentry *befs_get_parent(struct dentry *child);
65 static const struct super_operations befs_sops = {
66 .alloc_inode = befs_alloc_inode, /* allocate a new inode */
67 .free_inode = befs_free_inode, /* deallocate an inode */
68 .put_super = befs_put_super, /* uninit super */
69 .statfs = befs_statfs, /* statfs */
70 .remount_fs = befs_remount,
71 .show_options = befs_show_options,
74 /* slab cache for befs_inode_info objects */
75 static struct kmem_cache *befs_inode_cachep;
77 static const struct file_operations befs_dir_operations = {
78 .read = generic_read_dir,
79 .iterate_shared = befs_readdir,
80 .llseek = generic_file_llseek,
83 static const struct inode_operations befs_dir_inode_operations = {
84 .lookup = befs_lookup,
87 static const struct address_space_operations befs_aops = {
88 .readpage = befs_readpage,
92 static const struct address_space_operations befs_symlink_aops = {
93 .readpage = befs_symlink_readpage,
96 static const struct export_operations befs_export_operations = {
97 .fh_to_dentry = befs_fh_to_dentry,
98 .fh_to_parent = befs_fh_to_parent,
99 .get_parent = befs_get_parent,
103 * Called by generic_file_read() to read a page of data
105 * In turn, simply calls a generic block read function and
106 * passes it the address of befs_get_block, for mapping file
107 * positions to disk blocks.
110 befs_readpage(struct file *file, struct page *page)
112 return block_read_full_page(page, befs_get_block);
116 befs_bmap(struct address_space *mapping, sector_t block)
118 return generic_block_bmap(mapping, block, befs_get_block);
122 * Generic function to map a file position (block) to a
123 * disk offset (passed back in bh_result).
125 * Used by many higher level functions.
127 * Calls befs_fblock2brun() in datastream.c to do the real work.
131 befs_get_block(struct inode *inode, sector_t block,
132 struct buffer_head *bh_result, int create)
134 struct super_block *sb = inode->i_sb;
135 befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
136 befs_block_run run = BAD_IADDR;
140 befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld",
141 (unsigned long)inode->i_ino, (long)block);
143 befs_error(sb, "befs_get_block() was asked to write to "
144 "block %ld in inode %lu", (long)block,
145 (unsigned long)inode->i_ino);
149 res = befs_fblock2brun(sb, ds, block, &run);
150 if (res != BEFS_OK) {
152 "<--- %s for inode %lu, block %ld ERROR",
153 __func__, (unsigned long)inode->i_ino,
158 disk_off = (ulong) iaddr2blockno(sb, &run);
160 map_bh(bh_result, inode->i_sb, disk_off);
162 befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu",
163 __func__, (unsigned long)inode->i_ino, (long)block,
164 (unsigned long)disk_off);
169 static struct dentry *
170 befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
173 struct super_block *sb = dir->i_sb;
174 const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
179 const char *name = dentry->d_name.name;
181 befs_debug(sb, "---> %s name %pd inode %ld", __func__,
184 /* Convert to UTF-8 */
185 if (BEFS_SB(sb)->nls) {
187 befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen);
189 befs_debug(sb, "<--- %s ERROR", __func__);
192 ret = befs_btree_find(sb, ds, utfname, &offset);
196 ret = befs_btree_find(sb, ds, name, &offset);
199 if (ret == BEFS_BT_NOT_FOUND) {
200 befs_debug(sb, "<--- %s %pd not found", __func__, dentry);
202 } else if (ret != BEFS_OK || offset == 0) {
203 befs_error(sb, "<--- %s Error", __func__);
204 inode = ERR_PTR(-ENODATA);
206 inode = befs_iget(dir->i_sb, (ino_t) offset);
208 befs_debug(sb, "<--- %s", __func__);
210 return d_splice_alias(inode, dentry);
214 befs_readdir(struct file *file, struct dir_context *ctx)
216 struct inode *inode = file_inode(file);
217 struct super_block *sb = inode->i_sb;
218 const befs_data_stream *ds = &BEFS_I(inode)->i_data.ds;
222 char keybuf[BEFS_NAME_LEN + 1];
224 befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld",
225 __func__, file, inode->i_ino, ctx->pos);
228 result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1,
229 keybuf, &keysize, &value);
231 if (result == BEFS_ERR) {
232 befs_debug(sb, "<--- %s ERROR", __func__);
233 befs_error(sb, "IO error reading %pD (inode %lu)",
237 } else if (result == BEFS_BT_END) {
238 befs_debug(sb, "<--- %s END", __func__);
241 } else if (result == BEFS_BT_EMPTY) {
242 befs_debug(sb, "<--- %s Empty directory", __func__);
247 if (BEFS_SB(sb)->nls) {
252 befs_utf2nls(sb, keybuf, keysize, &nlsname,
255 befs_debug(sb, "<--- %s ERROR", __func__);
258 if (!dir_emit(ctx, nlsname, nlsnamelen,
259 (ino_t) value, DT_UNKNOWN)) {
265 if (!dir_emit(ctx, keybuf, keysize,
266 (ino_t) value, DT_UNKNOWN))
273 static struct inode *
274 befs_alloc_inode(struct super_block *sb)
276 struct befs_inode_info *bi;
278 bi = kmem_cache_alloc(befs_inode_cachep, GFP_KERNEL);
281 return &bi->vfs_inode;
284 static void befs_free_inode(struct inode *inode)
286 kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
289 static void init_once(void *foo)
291 struct befs_inode_info *bi = (struct befs_inode_info *) foo;
293 inode_init_once(&bi->vfs_inode);
296 static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
298 struct buffer_head *bh;
299 befs_inode *raw_inode;
300 struct befs_sb_info *befs_sb = BEFS_SB(sb);
301 struct befs_inode_info *befs_ino;
304 befs_debug(sb, "---> %s inode = %lu", __func__, ino);
306 inode = iget_locked(sb, ino);
308 return ERR_PTR(-ENOMEM);
309 if (!(inode->i_state & I_NEW))
312 befs_ino = BEFS_I(inode);
314 /* convert from vfs's inode number to befs's inode number */
315 befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino);
317 befs_debug(sb, " real inode number [%u, %hu, %hu]",
318 befs_ino->i_inode_num.allocation_group,
319 befs_ino->i_inode_num.start, befs_ino->i_inode_num.len);
321 bh = sb_bread(sb, inode->i_ino);
323 befs_error(sb, "unable to read inode block - "
324 "inode = %lu", inode->i_ino);
328 raw_inode = (befs_inode *) bh->b_data;
330 befs_dump_inode(sb, raw_inode);
332 if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) {
333 befs_error(sb, "Bad inode: %lu", inode->i_ino);
337 inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode);
340 * set uid and gid. But since current BeOS is single user OS, so
341 * you can change by "uid" or "gid" options.
344 inode->i_uid = befs_sb->mount_opts.use_uid ?
345 befs_sb->mount_opts.uid :
346 make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid));
347 inode->i_gid = befs_sb->mount_opts.use_gid ?
348 befs_sb->mount_opts.gid :
349 make_kgid(&init_user_ns, 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 strlcpy(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 if (befs_ino->i_flags & BEFS_LONG_SYMLINK) {
399 inode->i_op = &page_symlink_inode_operations;
400 inode_nohighmem(inode);
401 inode->i_mapping->a_ops = &befs_symlink_aops;
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__);
424 return ERR_PTR(-EIO);
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_usercopy("befs_inode_cache",
435 sizeof(struct befs_inode_info), 0,
436 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
438 offsetof(struct befs_inode_info,
440 sizeof_field(struct befs_inode_info,
443 if (befs_inode_cachep == NULL)
449 /* Called at fs teardown.
451 * Taken from NFS implementation by Al Viro.
454 befs_destroy_inodecache(void)
457 * Make sure all delayed rcu free inodes are flushed before we
461 kmem_cache_destroy(befs_inode_cachep);
465 * The inode of symbolic link is different to data stream.
466 * The data stream become link name. Unless the LONG_SYMLINK
469 static int befs_symlink_readpage(struct file *unused, struct page *page)
471 struct inode *inode = page->mapping->host;
472 struct super_block *sb = inode->i_sb;
473 struct befs_inode_info *befs_ino = BEFS_I(inode);
474 befs_data_stream *data = &befs_ino->i_data.ds;
475 befs_off_t len = data->size;
476 char *link = page_address(page);
478 if (len == 0 || len > PAGE_SIZE) {
479 befs_error(sb, "Long symlink with illegal length");
482 befs_debug(sb, "Follow long symlink");
484 if (befs_read_lsymlink(sb, data, link, len) != len) {
485 befs_error(sb, "Failed to read entire long symlink");
488 link[len - 1] = '\0';
489 SetPageUptodate(page);
499 * UTF-8 to NLS charset convert routine
501 * Uses uni2char() / char2uni() rather than the nls tables directly
504 befs_utf2nls(struct super_block *sb, const char *in,
505 int in_len, char **out, int *out_len)
507 struct nls_table *nls = BEFS_SB(sb)->nls;
512 /* The utf8->nls conversion won't make the final nls string bigger
513 * than the utf one, but if the string is pure ascii they'll have the
514 * same width and an extra char is needed to save the additional \0
516 int maxlen = in_len + 1;
518 befs_debug(sb, "---> %s", __func__);
521 befs_error(sb, "%s called with no NLS table loaded", __func__);
525 *out = result = kmalloc(maxlen, GFP_NOFS);
529 for (i = o = 0; i < in_len; i += utflen, o += unilen) {
531 /* convert from UTF-8 to Unicode */
532 utflen = utf8_to_utf32(&in[i], in_len - i, &uni);
536 /* convert from Unicode to nls */
537 if (uni > MAX_WCHAR_T)
539 unilen = nls->uni2char(uni, &result[o], in_len - o);
546 befs_debug(sb, "<--- %s", __func__);
551 befs_error(sb, "Name using character set %s contains a character that "
552 "cannot be converted to unicode.", nls->charset);
553 befs_debug(sb, "<--- %s", __func__);
559 * befs_nls2utf - Convert NLS string to utf8 encodeing
561 * @in: Input string buffer in NLS format
562 * @in_len: Length of input string in bytes
563 * @out: The output string in UTF-8 format
564 * @out_len: Length of the output buffer
566 * Converts input string @in, which is in the format of the loaded NLS map,
567 * into a utf8 string.
569 * The destination string @out is allocated by this function and the caller is
570 * responsible for freeing it with kfree()
572 * On return, *@out_len is the length of @out in bytes.
574 * On success, the return value is the number of utf8 characters written to
575 * the output buffer @out.
577 * On Failure, a negative number coresponding to the error code is returned.
581 befs_nls2utf(struct super_block *sb, const char *in,
582 int in_len, char **out, int *out_len)
584 struct nls_table *nls = BEFS_SB(sb)->nls;
590 * There are nls characters that will translate to 3-chars-wide UTF-8
591 * characters, an additional byte is needed to save the final \0
594 int maxlen = (3 * in_len) + 1;
596 befs_debug(sb, "---> %s\n", __func__);
599 befs_error(sb, "%s called with no NLS table loaded.",
604 *out = result = kmalloc(maxlen, GFP_NOFS);
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 character set %s contains a character that "
632 "cannot be converted to unicode.", nls->charset);
633 befs_debug(sb, "<--- %s", __func__);
638 static struct inode *befs_nfs_get_inode(struct super_block *sb, uint64_t ino,
641 /* No need to handle i_generation */
642 return befs_iget(sb, ino);
646 * Map a NFS file handle to a corresponding dentry
648 static struct dentry *befs_fh_to_dentry(struct super_block *sb,
649 struct fid *fid, int fh_len, int fh_type)
651 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
656 * Find the parent for a file specified by NFS handle
658 static struct dentry *befs_fh_to_parent(struct super_block *sb,
659 struct fid *fid, int fh_len, int fh_type)
661 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
665 static struct dentry *befs_get_parent(struct dentry *child)
667 struct inode *parent;
668 struct befs_inode_info *befs_ino = BEFS_I(d_inode(child));
670 parent = befs_iget(child->d_sb,
671 (unsigned long)befs_ino->i_parent.start);
673 return ERR_CAST(parent);
675 return d_obtain_alias(parent);
679 Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err,
682 static const match_table_t befs_tokens = {
685 {Opt_charset, "iocharset=%s"},
686 {Opt_debug, "debug"},
691 parse_options(char *options, struct befs_mount_options *opts)
694 substring_t args[MAX_OPT_ARGS];
699 /* Initialize options */
700 opts->uid = GLOBAL_ROOT_UID;
701 opts->gid = GLOBAL_ROOT_GID;
704 opts->iocharset = NULL;
710 while ((p = strsep(&options, ",")) != NULL) {
716 token = match_token(p, befs_tokens, args);
719 if (match_int(&args[0], &option))
723 uid = make_kuid(current_user_ns(), option);
724 if (!uid_valid(uid)) {
725 pr_err("Invalid uid %d, "
726 "using default\n", option);
733 if (match_int(&args[0], &option))
737 gid = make_kgid(current_user_ns(), option);
738 if (!gid_valid(gid)) {
739 pr_err("Invalid gid %d, "
740 "using default\n", option);
747 kfree(opts->iocharset);
748 opts->iocharset = match_strdup(&args[0]);
749 if (!opts->iocharset) {
750 pr_err("allocation failure for "
751 "iocharset string\n");
759 pr_err("Unrecognized mount option \"%s\" "
760 "or missing value\n", p);
767 static int befs_show_options(struct seq_file *m, struct dentry *root)
769 struct befs_sb_info *befs_sb = BEFS_SB(root->d_sb);
770 struct befs_mount_options *opts = &befs_sb->mount_opts;
772 if (!uid_eq(opts->uid, GLOBAL_ROOT_UID))
773 seq_printf(m, ",uid=%u",
774 from_kuid_munged(&init_user_ns, opts->uid));
775 if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
776 seq_printf(m, ",gid=%u",
777 from_kgid_munged(&init_user_ns, opts->gid));
779 seq_printf(m, ",charset=%s", opts->iocharset);
781 seq_puts(m, ",debug");
785 /* This function has the responsibiltiy of getting the
786 * filesystem ready for unmounting.
787 * Basically, we free everything that we allocated in
791 befs_put_super(struct super_block *sb)
793 kfree(BEFS_SB(sb)->mount_opts.iocharset);
794 BEFS_SB(sb)->mount_opts.iocharset = NULL;
795 unload_nls(BEFS_SB(sb)->nls);
796 kfree(sb->s_fs_info);
797 sb->s_fs_info = NULL;
800 /* Allocate private field of the superblock, fill it.
802 * Finish filling the public superblock fields
803 * Make the root directory
804 * Load a set of NLS translations if needed.
807 befs_fill_super(struct super_block *sb, void *data, int silent)
809 struct buffer_head *bh;
810 struct befs_sb_info *befs_sb;
811 befs_super_block *disk_sb;
814 const unsigned long sb_block = 0;
815 const off_t x86_sb_off = 512;
818 sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL);
819 if (sb->s_fs_info == NULL)
822 befs_sb = BEFS_SB(sb);
824 if (!parse_options((char *) data, &befs_sb->mount_opts)) {
826 befs_error(sb, "cannot parse mount options");
827 goto unacquire_priv_sbp;
830 befs_debug(sb, "---> %s", __func__);
832 if (!sb_rdonly(sb)) {
834 "No write support. Marking filesystem read-only");
835 sb->s_flags |= SB_RDONLY;
839 * Set dummy blocksize to read super block.
840 * Will be set to real fs blocksize later.
842 * Linux 2.4.10 and later refuse to read blocks smaller than
843 * the logical block size for the device. But we also need to read at
844 * least 1k to get the second 512 bytes of the volume.
846 blocksize = sb_min_blocksize(sb, 1024);
849 befs_error(sb, "unable to set blocksize");
850 goto unacquire_priv_sbp;
853 bh = sb_bread(sb, sb_block);
856 befs_error(sb, "unable to read superblock");
857 goto unacquire_priv_sbp;
860 /* account for offset of super block on x86 */
861 disk_sb = (befs_super_block *) bh->b_data;
862 if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) ||
863 (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) {
864 befs_debug(sb, "Using PPC superblock location");
866 befs_debug(sb, "Using x86 superblock location");
868 (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
871 if ((befs_load_sb(sb, disk_sb) != BEFS_OK) ||
872 (befs_check_sb(sb) != BEFS_OK))
875 befs_dump_super_block(sb, disk_sb);
879 if (befs_sb->num_blocks > ~((sector_t)0)) {
881 befs_error(sb, "blocks count: %llu is larger than the host can use",
882 befs_sb->num_blocks);
883 goto unacquire_priv_sbp;
887 * set up enough so that it can read an inode
888 * Fill in kernel superblock fields from private sb
890 sb->s_magic = BEFS_SUPER_MAGIC;
891 /* Set real blocksize of fs */
892 sb_set_blocksize(sb, (ulong) befs_sb->block_size);
893 sb->s_op = &befs_sops;
894 sb->s_export_op = &befs_export_operations;
895 root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
898 goto unacquire_priv_sbp;
900 sb->s_root = d_make_root(root);
903 befs_error(sb, "get root inode failed");
904 goto unacquire_priv_sbp;
907 /* load nls library */
908 if (befs_sb->mount_opts.iocharset) {
909 befs_debug(sb, "Loading nls: %s",
910 befs_sb->mount_opts.iocharset);
911 befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
913 befs_warning(sb, "Cannot load nls %s"
914 " loading default nls",
915 befs_sb->mount_opts.iocharset);
916 befs_sb->nls = load_nls_default();
918 /* load default nls if none is specified in mount options */
920 befs_debug(sb, "Loading default nls");
921 befs_sb->nls = load_nls_default();
930 kfree(befs_sb->mount_opts.iocharset);
931 kfree(sb->s_fs_info);
932 sb->s_fs_info = NULL;
939 befs_remount(struct super_block *sb, int *flags, char *data)
942 if (!(*flags & SB_RDONLY))
948 befs_statfs(struct dentry *dentry, struct kstatfs *buf)
950 struct super_block *sb = dentry->d_sb;
951 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
953 befs_debug(sb, "---> %s", __func__);
955 buf->f_type = BEFS_SUPER_MAGIC;
956 buf->f_bsize = sb->s_blocksize;
957 buf->f_blocks = BEFS_SB(sb)->num_blocks;
958 buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks;
959 buf->f_bavail = buf->f_bfree;
960 buf->f_files = 0; /* UNKNOWN */
961 buf->f_ffree = 0; /* UNKNOWN */
962 buf->f_fsid.val[0] = (u32)id;
963 buf->f_fsid.val[1] = (u32)(id >> 32);
964 buf->f_namelen = BEFS_NAME_LEN;
966 befs_debug(sb, "<--- %s", __func__);
971 static struct dentry *
972 befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name,
975 return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super);
978 static struct file_system_type befs_fs_type = {
979 .owner = THIS_MODULE,
982 .kill_sb = kill_block_super,
983 .fs_flags = FS_REQUIRES_DEV,
985 MODULE_ALIAS_FS("befs");
992 pr_info("version: %s\n", BEFS_VERSION);
994 err = befs_init_inodecache();
998 err = register_filesystem(&befs_fs_type);
1000 goto unacquire_inodecache;
1004 unacquire_inodecache:
1005 befs_destroy_inodecache();
1014 befs_destroy_inodecache();
1016 unregister_filesystem(&befs_fs_type);
1020 * Macros that typecheck the init and exit functions,
1021 * ensures that they are called at init and cleanup,
1022 * and eliminates warnings about unused functions.
1024 module_init(init_befs_fs)
1025 module_exit(exit_befs_fs)