[linux.git] / fs / hfsplus / super.c

/*
 *  linux/fs/hfsplus/super.c
 *
 * Copyright (C) 2001
 * Brad Boyer ([email protected])
 * (C) 2003 Ardis Technologies <[email protected]>
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/vfs.h>
#include <linux/nls.h>

static struct inode *hfsplus_alloc_inode(struct super_block *sb);
static void hfsplus_destroy_inode(struct inode *inode);

#include "hfsplus_fs.h"

static int hfsplus_system_read_inode(struct inode *inode)
{
	struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;

	switch (inode->i_ino) {
	case HFSPLUS_EXT_CNID:
		hfsplus_inode_read_fork(inode, &vhdr->ext_file);
		inode->i_mapping->a_ops = &hfsplus_btree_aops;
		break;
	case HFSPLUS_CAT_CNID:
		hfsplus_inode_read_fork(inode, &vhdr->cat_file);
		inode->i_mapping->a_ops = &hfsplus_btree_aops;
		break;
	case HFSPLUS_ALLOC_CNID:
		hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
		inode->i_mapping->a_ops = &hfsplus_aops;
		break;
	case HFSPLUS_START_CNID:
		hfsplus_inode_read_fork(inode, &vhdr->start_file);
		break;
	case HFSPLUS_ATTR_CNID:
		hfsplus_inode_read_fork(inode, &vhdr->attr_file);
		inode->i_mapping->a_ops = &hfsplus_btree_aops;
		break;
	default:
		return -EIO;
	}

	return 0;
}

struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
{
	struct hfs_find_data fd;
	struct inode *inode;
	int err;

	inode = iget_locked(sb, ino);
	if (!inode)
		return ERR_PTR(-ENOMEM);
	if (!(inode->i_state & I_NEW))
		return inode;

	INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
	mutex_init(&HFSPLUS_I(inode)->extents_lock);
	HFSPLUS_I(inode)->flags = 0;
	HFSPLUS_I(inode)->extent_state = 0;
	HFSPLUS_I(inode)->rsrc_inode = NULL;
	atomic_set(&HFSPLUS_I(inode)->opencnt, 0);

	if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
	    inode->i_ino == HFSPLUS_ROOT_CNID) {
		hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
		err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
		if (!err)
			err = hfsplus_cat_read_inode(inode, &fd);
		hfs_find_exit(&fd);
	} else {
		err = hfsplus_system_read_inode(inode);
	}

	if (err) {
		iget_failed(inode);
		return ERR_PTR(err);
	}

	unlock_new_inode(inode);
	return inode;
}

static int hfsplus_system_write_inode(struct inode *inode)
{
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
	struct hfsplus_vh *vhdr = sbi->s_vhdr;
	struct hfsplus_fork_raw *fork;
	struct hfs_btree *tree = NULL;

	switch (inode->i_ino) {
	case HFSPLUS_EXT_CNID:
		fork = &vhdr->ext_file;
		tree = sbi->ext_tree;
		break;
	case HFSPLUS_CAT_CNID:
		fork = &vhdr->cat_file;
		tree = sbi->cat_tree;
		break;
	case HFSPLUS_ALLOC_CNID:
		fork = &vhdr->alloc_file;
		break;
	case HFSPLUS_START_CNID:
		fork = &vhdr->start_file;
		break;
	case HFSPLUS_ATTR_CNID:
		fork = &vhdr->attr_file;
		tree = sbi->attr_tree;
	default:
		return -EIO;
	}

	if (fork->total_size != cpu_to_be64(inode->i_size)) {
		set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
		inode->i_sb->s_dirt = 1;
	}
	hfsplus_inode_write_fork(inode, fork);
	if (tree)
		hfs_btree_write(tree);
	return 0;
}

static int hfsplus_write_inode(struct inode *inode,
		struct writeback_control *wbc)
{
	dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);

	hfsplus_ext_write_extent(inode);

	if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
	    inode->i_ino == HFSPLUS_ROOT_CNID)
		return hfsplus_cat_write_inode(inode);
	else
		return hfsplus_system_write_inode(inode);
}

static void hfsplus_evict_inode(struct inode *inode)
{
	dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
	truncate_inode_pages(&inode->i_data, 0);
	end_writeback(inode);
	if (HFSPLUS_IS_RSRC(inode)) {
		HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
		iput(HFSPLUS_I(inode)->rsrc_inode);
	}
}

int hfsplus_sync_fs(struct super_block *sb, int wait)
{
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	struct hfsplus_vh *vhdr = sbi->s_vhdr;
	int write_backup = 0;
	int error, error2;

	if (!wait)
		return 0;

	dprint(DBG_SUPER, "hfsplus_write_super\n");

	sb->s_dirt = 0;

	/*
	 * Explicitly write out the special metadata inodes.
	 *
	 * While these special inodes are marked as hashed and written
	 * out peridocically by the flusher threads we redirty them
	 * during writeout of normal inodes, and thus the life lock
	 * prevents us from getting the latest state to disk.
	 */
	error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
	error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
	if (!error)
		error = error2;
	error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
	if (!error)
		error = error2;

	mutex_lock(&sbi->vh_mutex);
	mutex_lock(&sbi->alloc_mutex);
	vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
	vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
	vhdr->folder_count = cpu_to_be32(sbi->folder_count);
	vhdr->file_count = cpu_to_be32(sbi->file_count);

	if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
		memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
		write_backup = 1;
	}

	error2 = hfsplus_submit_bio(sb->s_bdev,
				   sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
				   sbi->s_vhdr, WRITE_SYNC);
	if (!error)
		error = error2;
	if (!write_backup)
		goto out;

	error2 = hfsplus_submit_bio(sb->s_bdev,
				  sbi->part_start + sbi->sect_count - 2,
				  sbi->s_backup_vhdr, WRITE_SYNC);
	if (!error)
		error2 = error;
out:
	mutex_unlock(&sbi->alloc_mutex);
	mutex_unlock(&sbi->vh_mutex);
	return error;
}

static void hfsplus_write_super(struct super_block *sb)
{
	if (!(sb->s_flags & MS_RDONLY))
		hfsplus_sync_fs(sb, 1);
	else
		sb->s_dirt = 0;
}

static void hfsplus_put_super(struct super_block *sb)
{
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);

	dprint(DBG_SUPER, "hfsplus_put_super\n");

	if (!sb->s_fs_info)
		return;

	if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
		struct hfsplus_vh *vhdr = sbi->s_vhdr;

		vhdr->modify_date = hfsp_now2mt();
		vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
		vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);

		hfsplus_sync_fs(sb, 1);
	}

	hfs_btree_close(sbi->cat_tree);
	hfs_btree_close(sbi->ext_tree);
	iput(sbi->alloc_file);
	iput(sbi->hidden_dir);
	kfree(sbi->s_vhdr);
	kfree(sbi->s_backup_vhdr);
	unload_nls(sbi->nls);
	kfree(sb->s_fs_info);
	sb->s_fs_info = NULL;
}

static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
{
	struct super_block *sb = dentry->d_sb;
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);

	buf->f_type = HFSPLUS_SUPER_MAGIC;
	buf->f_bsize = sb->s_blocksize;
	buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
	buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
	buf->f_bavail = buf->f_bfree;
	buf->f_files = 0xFFFFFFFF;
	buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
	buf->f_fsid.val[0] = (u32)id;
	buf->f_fsid.val[1] = (u32)(id >> 32);
	buf->f_namelen = HFSPLUS_MAX_STRLEN;

	return 0;
}

static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
{
	if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
		return 0;
	if (!(*flags & MS_RDONLY)) {
		struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
		int force = 0;

		if (!hfsplus_parse_options_remount(data, &force))
			return -EINVAL;

		if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
			printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
			       "running fsck.hfsplus is recommended.  leaving read-only.\n");
			sb->s_flags |= MS_RDONLY;
			*flags |= MS_RDONLY;
		} else if (force) {
			/* nothing */
		} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
			printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
			sb->s_flags |= MS_RDONLY;
			*flags |= MS_RDONLY;
		} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
			printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
			sb->s_flags |= MS_RDONLY;
			*flags |= MS_RDONLY;
		}
	}
	return 0;
}

static const struct super_operations hfsplus_sops = {
	.alloc_inode	= hfsplus_alloc_inode,
	.destroy_inode	= hfsplus_destroy_inode,
	.write_inode	= hfsplus_write_inode,
	.evict_inode	= hfsplus_evict_inode,
	.put_super	= hfsplus_put_super,
	.write_super	= hfsplus_write_super,
	.sync_fs	= hfsplus_sync_fs,
	.statfs		= hfsplus_statfs,
	.remount_fs	= hfsplus_remount,
	.show_options	= hfsplus_show_options,
};

static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
{
	struct hfsplus_vh *vhdr;
	struct hfsplus_sb_info *sbi;
	hfsplus_cat_entry entry;
	struct hfs_find_data fd;
	struct inode *root, *inode;
	struct qstr str;
	struct nls_table *nls = NULL;
	int err = -EINVAL;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;

	sb->s_fs_info = sbi;
	mutex_init(&sbi->alloc_mutex);
	mutex_init(&sbi->vh_mutex);
	hfsplus_fill_defaults(sbi);
	if (!hfsplus_parse_options(data, sbi)) {
		printk(KERN_ERR "hfs: unable to parse mount options\n");
		err = -EINVAL;
		goto cleanup;
	}

	/* temporarily use utf8 to correctly find the hidden dir below */
	nls = sbi->nls;
	sbi->nls = load_nls("utf8");
	if (!sbi->nls) {
		printk(KERN_ERR "hfs: unable to load nls for utf8\n");
		err = -EINVAL;
		goto cleanup;
	}

	/* Grab the volume header */
	if (hfsplus_read_wrapper(sb)) {
		if (!silent)
			printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
		err = -EINVAL;
		goto cleanup;
	}
	vhdr = sbi->s_vhdr;

	/* Copy parts of the volume header into the superblock */
	sb->s_magic = HFSPLUS_VOLHEAD_SIG;
	if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
	    be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
		printk(KERN_ERR "hfs: wrong filesystem version\n");
		goto cleanup;
	}
	sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
	sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
	sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
	sbi->file_count = be32_to_cpu(vhdr->file_count);
	sbi->folder_count = be32_to_cpu(vhdr->folder_count);
	sbi->data_clump_blocks =
		be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
	if (!sbi->data_clump_blocks)
		sbi->data_clump_blocks = 1;
	sbi->rsrc_clump_blocks =
		be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
	if (!sbi->rsrc_clump_blocks)
		sbi->rsrc_clump_blocks = 1;

	/* Set up operations so we can load metadata */
	sb->s_op = &hfsplus_sops;
	sb->s_maxbytes = MAX_LFS_FILESIZE;

	if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
		printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
		       "running fsck.hfsplus is recommended.  mounting read-only.\n");
		sb->s_flags |= MS_RDONLY;
	} else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
		/* nothing */
	} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
		printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
		sb->s_flags |= MS_RDONLY;
	} else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) {
		printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
		       "use the force option at your own risk, mounting read-only.\n");
		sb->s_flags |= MS_RDONLY;
	}

	/* Load metadata objects (B*Trees) */
	sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
	if (!sbi->ext_tree) {
		printk(KERN_ERR "hfs: failed to load extents file\n");
		goto cleanup;
	}
	sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
	if (!sbi->cat_tree) {
		printk(KERN_ERR "hfs: failed to load catalog file\n");
		goto cleanup;
	}

	inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
	if (IS_ERR(inode)) {
		printk(KERN_ERR "hfs: failed to load allocation file\n");
		err = PTR_ERR(inode);
		goto cleanup;
	}
	sbi->alloc_file = inode;

	/* Load the root directory */
	root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
	if (IS_ERR(root)) {
		printk(KERN_ERR "hfs: failed to load root directory\n");
		err = PTR_ERR(root);
		goto cleanup;
	}
	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		err = -ENOMEM;
		goto cleanup;
	}
	sb->s_root->d_op = &hfsplus_dentry_operations;

	str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
	str.name = HFSP_HIDDENDIR_NAME;
	hfs_find_init(sbi->cat_tree, &fd);
	hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
	if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
		hfs_find_exit(&fd);
		if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
			goto cleanup;
		inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
		if (IS_ERR(inode)) {
			err = PTR_ERR(inode);
			goto cleanup;
		}
		sbi->hidden_dir = inode;
	} else
		hfs_find_exit(&fd);

	if (sb->s_flags & MS_RDONLY)
		goto out;

	/* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
	 * all three are registered with Apple for our use
	 */
	vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
	vhdr->modify_date = hfsp_now2mt();
	be32_add_cpu(&vhdr->write_count, 1);
	vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
	vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
	hfsplus_sync_fs(sb, 1);

	if (!sbi->hidden_dir) {
		mutex_lock(&sbi->vh_mutex);
		sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
		hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode,
				   &str, sbi->hidden_dir);
		mutex_unlock(&sbi->vh_mutex);

		hfsplus_mark_inode_dirty(sbi->hidden_dir, HFSPLUS_I_CAT_DIRTY);
	}
out:
	unload_nls(sbi->nls);
	sbi->nls = nls;
	return 0;

cleanup:
	hfsplus_put_super(sb);
	unload_nls(nls);
	return err;
}

MODULE_AUTHOR("Brad Boyer");
MODULE_DESCRIPTION("Extended Macintosh Filesystem");
MODULE_LICENSE("GPL");

static struct kmem_cache *hfsplus_inode_cachep;

static struct inode *hfsplus_alloc_inode(struct super_block *sb)
{
	struct hfsplus_inode_info *i;

	i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
	return i ? &i->vfs_inode : NULL;
}

static void hfsplus_destroy_inode(struct inode *inode)
{
	kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
}

#define HFSPLUS_INODE_SIZE	sizeof(struct hfsplus_inode_info)

static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
			  int flags, const char *dev_name, void *data)
{
	return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
}

static struct file_system_type hfsplus_fs_type = {
	.owner		= THIS_MODULE,
	.name		= "hfsplus",
	.mount		= hfsplus_mount,
	.kill_sb	= kill_block_super,
	.fs_flags	= FS_REQUIRES_DEV,
};

static void hfsplus_init_once(void *p)
{
	struct hfsplus_inode_info *i = p;

	inode_init_once(&i->vfs_inode);
}

static int __init init_hfsplus_fs(void)
{
	int err;

	hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
		HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
		hfsplus_init_once);
	if (!hfsplus_inode_cachep)
		return -ENOMEM;
	err = register_filesystem(&hfsplus_fs_type);
	if (err)
		kmem_cache_destroy(hfsplus_inode_cachep);
	return err;
}

static void __exit exit_hfsplus_fs(void)
{
	unregister_filesystem(&hfsplus_fs_type);
	kmem_cache_destroy(hfsplus_inode_cachep);
}

module_init(init_hfsplus_fs)
module_exit(exit_hfsplus_fs)
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/hfsplus/super.c
	3	*
	4	* Copyright (C) 2001
	5	* Brad Boyer ([email protected])
	6	* (C) 2003 Ardis Technologies <[email protected]>
	7	*
	8	*/
	9
1da177e4 LT	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/pagemap.h>
	13	#include <linux/fs.h>
1da177e4	14	#include <linux/slab.h>
1da177e4 LT	15	#include <linux/vfs.h>
	16	#include <linux/nls.h>
	17
	18	static struct inode hfsplus_alloc_inode(struct super_block sb);
	19	static void hfsplus_destroy_inode(struct inode *inode);
	20
	21	#include "hfsplus_fs.h"
	22
fc4fff82 CH	23	static int hfsplus_system_read_inode(struct inode *inode)
	24	{
	25	struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
	26
	27	switch (inode->i_ino) {
	28	case HFSPLUS_EXT_CNID:
	29	hfsplus_inode_read_fork(inode, &vhdr->ext_file);
	30	inode->i_mapping->a_ops = &hfsplus_btree_aops;
	31	break;
	32	case HFSPLUS_CAT_CNID:
	33	hfsplus_inode_read_fork(inode, &vhdr->cat_file);
	34	inode->i_mapping->a_ops = &hfsplus_btree_aops;
	35	break;
	36	case HFSPLUS_ALLOC_CNID:
	37	hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
	38	inode->i_mapping->a_ops = &hfsplus_aops;
	39	break;
	40	case HFSPLUS_START_CNID:
	41	hfsplus_inode_read_fork(inode, &vhdr->start_file);
	42	break;
	43	case HFSPLUS_ATTR_CNID:
	44	hfsplus_inode_read_fork(inode, &vhdr->attr_file);
	45	inode->i_mapping->a_ops = &hfsplus_btree_aops;
	46	break;
	47	default:
	48	return -EIO;
	49	}
	50
	51	return 0;
	52	}
	53
63525391	54	struct inode hfsplus_iget(struct super_block sb, unsigned long ino)
1da177e4 LT	55	{
1da177e4 LT	56	struct hfs_find_data fd;
63525391	57	struct inode *inode;
fc4fff82	58	int err;
63525391 DH	59
	60	inode = iget_locked(sb, ino);
	61	if (!inode)
	62	return ERR_PTR(-ENOMEM);
	63	if (!(inode->i_state & I_NEW))
	64	return inode;
1da177e4	65
6af502de CH	66	INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
	67	mutex_init(&HFSPLUS_I(inode)->extents_lock);
	68	HFSPLUS_I(inode)->flags = 0;
b33b7921	69	HFSPLUS_I(inode)->extent_state = 0;
6af502de CH	70	HFSPLUS_I(inode)->rsrc_inode = NULL;
6af502de CH	71	atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
1da177e4	72
fc4fff82 CH	73	if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID \|\|
fc4fff82 CH	74	inode->i_ino == HFSPLUS_ROOT_CNID) {
dd73a01a	75	hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
1da177e4 LT	76	err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
	77	if (!err)
	78	err = hfsplus_cat_read_inode(inode, &fd);
	79	hfs_find_exit(&fd);
fc4fff82 CH	80	} else {
fc4fff82 CH	81	err = hfsplus_system_read_inode(inode);
1da177e4	82	}
fc4fff82 CH	83
	84	if (err) {
	85	iget_failed(inode);
	86	return ERR_PTR(err);
1da177e4 LT	87	}
1da177e4 LT	88
63525391 DH	89	unlock_new_inode(inode);
63525391 DH	90	return inode;
1da177e4 LT	91	}
1da177e4 LT	92
b5080f77	93	static int hfsplus_system_write_inode(struct inode *inode)
1da177e4	94	{
dd73a01a	95	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
b5080f77 CH	96	struct hfsplus_vh *vhdr = sbi->s_vhdr;
	97	struct hfsplus_fork_raw *fork;
	98	struct hfs_btree *tree = NULL;
1da177e4	99
1da177e4	100	switch (inode->i_ino) {
1da177e4	101	case HFSPLUS_EXT_CNID:
b5080f77 CH	102	fork = &vhdr->ext_file;
b5080f77 CH	103	tree = sbi->ext_tree;
1da177e4 LT	104	break;
1da177e4 LT	105	case HFSPLUS_CAT_CNID:
b5080f77 CH	106	fork = &vhdr->cat_file;
b5080f77 CH	107	tree = sbi->cat_tree;
1da177e4 LT	108	break;
1da177e4 LT	109	case HFSPLUS_ALLOC_CNID:
b5080f77	110	fork = &vhdr->alloc_file;
1da177e4 LT	111	break;
1da177e4 LT	112	case HFSPLUS_START_CNID:
b5080f77	113	fork = &vhdr->start_file;
1da177e4 LT	114	break;
1da177e4 LT	115	case HFSPLUS_ATTR_CNID:
b5080f77 CH	116	fork = &vhdr->attr_file;
	117	tree = sbi->attr_tree;
	118	default:
	119	return -EIO;
	120	}
	121
	122	if (fork->total_size != cpu_to_be64(inode->i_size)) {
84adede3	123	set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
b5080f77	124	inode->i_sb->s_dirt = 1;
1da177e4	125	}
b5080f77 CH	126	hfsplus_inode_write_fork(inode, fork);
	127	if (tree)
	128	hfs_btree_write(tree);
	129	return 0;
	130	}
	131
	132	static int hfsplus_write_inode(struct inode *inode,
	133	struct writeback_control *wbc)
	134	{
	135	dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
	136
	137	hfsplus_ext_write_extent(inode);
	138
	139	if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID \|\|
	140	inode->i_ino == HFSPLUS_ROOT_CNID)
	141	return hfsplus_cat_write_inode(inode);
	142	else
	143	return hfsplus_system_write_inode(inode);
1da177e4 LT	144	}
1da177e4 LT	145
b57922d9	146	static void hfsplus_evict_inode(struct inode *inode)
1da177e4	147	{
b57922d9 AV	148	dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
	149	truncate_inode_pages(&inode->i_data, 0);
	150	end_writeback(inode);
1da177e4	151	if (HFSPLUS_IS_RSRC(inode)) {
6af502de CH	152	HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
6af502de CH	153	iput(HFSPLUS_I(inode)->rsrc_inode);
1da177e4	154	}
1da177e4 LT	155	}
1da177e4 LT	156
b5fc510c	157	int hfsplus_sync_fs(struct super_block *sb, int wait)
1da177e4	158	{
dd73a01a CH	159	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
dd73a01a CH	160	struct hfsplus_vh *vhdr = sbi->s_vhdr;
52399b17 CH	161	int write_backup = 0;
52399b17 CH	162	int error, error2;
1da177e4	163
f02e26f8 CH	164	if (!wait)
	165	return 0;
	166
1da177e4	167	dprint(DBG_SUPER, "hfsplus_write_super\n");
ebc1ac16	168
1da177e4	169	sb->s_dirt = 0;
1da177e4	170
7dc4f001 CH	171	/*
	172	* Explicitly write out the special metadata inodes.
	173	*
	174	* While these special inodes are marked as hashed and written
	175	* out peridocically by the flusher threads we redirty them
	176	* during writeout of normal inodes, and thus the life lock
	177	* prevents us from getting the latest state to disk.
	178	*/
	179	error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
	180	error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
	181	if (!error)
	182	error = error2;
	183	error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
	184	if (!error)
	185	error = error2;
	186
52399b17 CH	187	mutex_lock(&sbi->vh_mutex);
52399b17 CH	188	mutex_lock(&sbi->alloc_mutex);
dd73a01a	189	vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
dd73a01a CH	190	vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
	191	vhdr->folder_count = cpu_to_be32(sbi->folder_count);
	192	vhdr->file_count = cpu_to_be32(sbi->file_count);
1da177e4	193
84adede3	194	if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
52399b17 CH	195	memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
52399b17 CH	196	write_backup = 1;
1da177e4	197	}
52399b17	198
7dc4f001	199	error2 = hfsplus_submit_bio(sb->s_bdev,
52399b17 CH	200	sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
52399b17 CH	201	sbi->s_vhdr, WRITE_SYNC);
7dc4f001 CH	202	if (!error)
7dc4f001 CH	203	error = error2;
52399b17 CH	204	if (!write_backup)
	205	goto out;
	206
	207	error2 = hfsplus_submit_bio(sb->s_bdev,
	208	sbi->part_start + sbi->sect_count - 2,
	209	sbi->s_backup_vhdr, WRITE_SYNC);
	210	if (!error)
	211	error2 = error;
	212	out:
dd73a01a	213	mutex_unlock(&sbi->alloc_mutex);
7ac9fb9c	214	mutex_unlock(&sbi->vh_mutex);
52399b17	215	return error;
7fbc6df0 CH	216	}
	217
	218	static void hfsplus_write_super(struct super_block *sb)
	219	{
	220	if (!(sb->s_flags & MS_RDONLY))
	221	hfsplus_sync_fs(sb, 1);
	222	else
	223	sb->s_dirt = 0;
1da177e4 LT	224	}
	225
	226	static void hfsplus_put_super(struct super_block *sb)
	227	{
dd73a01a CH	228	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
dd73a01a CH	229
1da177e4	230	dprint(DBG_SUPER, "hfsplus_put_super\n");
dd73a01a	231
945b0920 CL	232	if (!sb->s_fs_info)
945b0920 CL	233	return;
6cfd0148	234
dd73a01a CH	235	if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
dd73a01a CH	236	struct hfsplus_vh *vhdr = sbi->s_vhdr;
1da177e4 LT	237
	238	vhdr->modify_date = hfsp_now2mt();
	239	vhdr->attributes \|= cpu_to_be32(HFSPLUS_VOL_UNMNT);
	240	vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
3b5ce8ae CH	241
3b5ce8ae CH	242	hfsplus_sync_fs(sb, 1);
1da177e4 LT	243	}
1da177e4 LT	244
dd73a01a CH	245	hfs_btree_close(sbi->cat_tree);
	246	hfs_btree_close(sbi->ext_tree);
	247	iput(sbi->alloc_file);
	248	iput(sbi->hidden_dir);
52399b17 CH	249	kfree(sbi->s_vhdr);
52399b17 CH	250	kfree(sbi->s_backup_vhdr);
dd73a01a	251	unload_nls(sbi->nls);
945b0920 CL	252	kfree(sb->s_fs_info);
945b0920 CL	253	sb->s_fs_info = NULL;
1da177e4 LT	254	}
1da177e4 LT	255
726c3342	256	static int hfsplus_statfs(struct dentry dentry, struct kstatfs buf)
1da177e4	257	{
726c3342	258	struct super_block *sb = dentry->d_sb;
dd73a01a	259	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
25564dd8	260	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
726c3342	261
1da177e4 LT	262	buf->f_type = HFSPLUS_SUPER_MAGIC;
1da177e4 LT	263	buf->f_bsize = sb->s_blocksize;
dd73a01a CH	264	buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
dd73a01a CH	265	buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
1da177e4 LT	266	buf->f_bavail = buf->f_bfree;
1da177e4 LT	267	buf->f_files = 0xFFFFFFFF;
dd73a01a	268	buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
25564dd8 CL	269	buf->f_fsid.val[0] = (u32)id;
25564dd8 CL	270	buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4 LT	271	buf->f_namelen = HFSPLUS_MAX_STRLEN;
	272
	273	return 0;
	274	}
	275
	276	static int hfsplus_remount(struct super_block sb, int flags, char *data)
	277	{
	278	if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
	279	return 0;
	280	if (!(*flags & MS_RDONLY)) {
dd73a01a	281	struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
6f80dfe5	282	int force = 0;
b0b623c3	283
6f80dfe5	284	if (!hfsplus_parse_options_remount(data, &force))
b0b623c3	285	return -EINVAL;
1da177e4 LT	286
1da177e4 LT	287	if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
634725a9	288	printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
1da177e4 LT	289	"running fsck.hfsplus is recommended. leaving read-only.\n");
	290	sb->s_flags \|= MS_RDONLY;
	291	*flags \|= MS_RDONLY;
6f80dfe5	292	} else if (force) {
b0b623c3	293	/* nothing */
1da177e4	294	} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
634725a9	295	printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
1da177e4 LT	296	sb->s_flags \|= MS_RDONLY;
1da177e4 LT	297	*flags \|= MS_RDONLY;
b0b623c3	298	} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
634725a9	299	printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
b0b623c3 RZ	300	sb->s_flags \|= MS_RDONLY;
b0b623c3 RZ	301	*flags \|= MS_RDONLY;
1da177e4 LT	302	}
	303	}
	304	return 0;
	305	}
	306
ee9b6d61	307	static const struct super_operations hfsplus_sops = {
1da177e4 LT	308	.alloc_inode = hfsplus_alloc_inode,
1da177e4 LT	309	.destroy_inode = hfsplus_destroy_inode,
1da177e4	310	.write_inode = hfsplus_write_inode,
b57922d9	311	.evict_inode = hfsplus_evict_inode,
1da177e4 LT	312	.put_super = hfsplus_put_super,
1da177e4 LT	313	.write_super = hfsplus_write_super,
7fbc6df0	314	.sync_fs = hfsplus_sync_fs,
1da177e4 LT	315	.statfs = hfsplus_statfs,
1da177e4 LT	316	.remount_fs = hfsplus_remount,
717dd80e	317	.show_options = hfsplus_show_options,
1da177e4 LT	318	};
	319
	320	static int hfsplus_fill_super(struct super_block sb, void data, int silent)
	321	{
	322	struct hfsplus_vh *vhdr;
	323	struct hfsplus_sb_info *sbi;
	324	hfsplus_cat_entry entry;
	325	struct hfs_find_data fd;
63525391	326	struct inode root, inode;
1da177e4 LT	327	struct qstr str;
	328	struct nls_table *nls = NULL;
	329	int err = -EINVAL;
	330
a5001a27	331	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1da177e4 LT	332	if (!sbi)
	333	return -ENOMEM;
	334
1da177e4	335	sb->s_fs_info = sbi;
40bf48af	336	mutex_init(&sbi->alloc_mutex);
7ac9fb9c	337	mutex_init(&sbi->vh_mutex);
717dd80e RZ	338	hfsplus_fill_defaults(sbi);
717dd80e RZ	339	if (!hfsplus_parse_options(data, sbi)) {
634725a9	340	printk(KERN_ERR "hfs: unable to parse mount options\n");
1da177e4 LT	341	err = -EINVAL;
	342	goto cleanup;
	343	}
	344
	345	/* temporarily use utf8 to correctly find the hidden dir below */
	346	nls = sbi->nls;
	347	sbi->nls = load_nls("utf8");
bd6a59b2	348	if (!sbi->nls) {
634725a9	349	printk(KERN_ERR "hfs: unable to load nls for utf8\n");
1da177e4 LT	350	err = -EINVAL;
	351	goto cleanup;
	352	}
	353
	354	/* Grab the volume header */
	355	if (hfsplus_read_wrapper(sb)) {
	356	if (!silent)
634725a9	357	printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
1da177e4 LT	358	err = -EINVAL;
	359	goto cleanup;
	360	}
dd73a01a	361	vhdr = sbi->s_vhdr;
1da177e4 LT	362
1da177e4 LT	363	/* Copy parts of the volume header into the superblock */
2179d372 DE	364	sb->s_magic = HFSPLUS_VOLHEAD_SIG;
	365	if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION \|\|
	366	be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
634725a9	367	printk(KERN_ERR "hfs: wrong filesystem version\n");
1da177e4 LT	368	goto cleanup;
1da177e4 LT	369	}
dd73a01a CH	370	sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
dd73a01a CH	371	sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
dd73a01a CH	372	sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
	373	sbi->file_count = be32_to_cpu(vhdr->file_count);
	374	sbi->folder_count = be32_to_cpu(vhdr->folder_count);
	375	sbi->data_clump_blocks =
	376	be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
	377	if (!sbi->data_clump_blocks)
	378	sbi->data_clump_blocks = 1;
	379	sbi->rsrc_clump_blocks =
	380	be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
	381	if (!sbi->rsrc_clump_blocks)
	382	sbi->rsrc_clump_blocks = 1;
1da177e4 LT	383
	384	/* Set up operations so we can load metadata */
	385	sb->s_op = &hfsplus_sops;
	386	sb->s_maxbytes = MAX_LFS_FILESIZE;
	387
	388	if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
634725a9 RZ	389	printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
634725a9 RZ	390	"running fsck.hfsplus is recommended. mounting read-only.\n");
1da177e4	391	sb->s_flags \|= MS_RDONLY;
84adede3	392	} else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
b0b623c3	393	/* nothing */
1da177e4	394	} else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
634725a9	395	printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
1da177e4	396	sb->s_flags \|= MS_RDONLY;
81a73719	397	} else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) {
355a4696	398	printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
634725a9	399	"use the force option at your own risk, mounting read-only.\n");
b0b623c3	400	sb->s_flags \|= MS_RDONLY;
1da177e4 LT	401	}
	402
	403	/* Load metadata objects (BTrees) /
dd73a01a CH	404	sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
dd73a01a CH	405	if (!sbi->ext_tree) {
634725a9	406	printk(KERN_ERR "hfs: failed to load extents file\n");
1da177e4 LT	407	goto cleanup;
1da177e4 LT	408	}
dd73a01a CH	409	sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
dd73a01a CH	410	if (!sbi->cat_tree) {
634725a9	411	printk(KERN_ERR "hfs: failed to load catalog file\n");
1da177e4 LT	412	goto cleanup;
	413	}
	414
63525391 DH	415	inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
63525391 DH	416	if (IS_ERR(inode)) {
634725a9	417	printk(KERN_ERR "hfs: failed to load allocation file\n");
63525391	418	err = PTR_ERR(inode);
1da177e4 LT	419	goto cleanup;
1da177e4 LT	420	}
dd73a01a	421	sbi->alloc_file = inode;
1da177e4 LT	422
1da177e4 LT	423	/* Load the root directory */
63525391 DH	424	root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
	425	if (IS_ERR(root)) {
	426	printk(KERN_ERR "hfs: failed to load root directory\n");
	427	err = PTR_ERR(root);
	428	goto cleanup;
	429	}
1da177e4 LT	430	sb->s_root = d_alloc_root(root);
1da177e4 LT	431	if (!sb->s_root) {
1da177e4	432	iput(root);
63525391	433	err = -ENOMEM;
1da177e4 LT	434	goto cleanup;
1da177e4 LT	435	}
d45bce8f	436	sb->s_root->d_op = &hfsplus_dentry_operations;
1da177e4 LT	437
	438	str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
	439	str.name = HFSP_HIDDENDIR_NAME;
dd73a01a	440	hfs_find_init(sbi->cat_tree, &fd);
1da177e4 LT	441	hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
	442	if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
	443	hfs_find_exit(&fd);
	444	if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
	445	goto cleanup;
63525391 DH	446	inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
	447	if (IS_ERR(inode)) {
	448	err = PTR_ERR(inode);
1da177e4	449	goto cleanup;
63525391	450	}
dd73a01a	451	sbi->hidden_dir = inode;
1da177e4 LT	452	} else
	453	hfs_find_exit(&fd);
	454
	455	if (sb->s_flags & MS_RDONLY)
	456	goto out;
	457
	458	/* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
	459	* all three are registered with Apple for our use
	460	*/
	461	vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
	462	vhdr->modify_date = hfsp_now2mt();
20c79e78	463	be32_add_cpu(&vhdr->write_count, 1);
1da177e4 LT	464	vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
1da177e4 LT	465	vhdr->attributes \|= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
3b5ce8ae	466	hfsplus_sync_fs(sb, 1);
1da177e4	467
dd73a01a	468	if (!sbi->hidden_dir) {
7ac9fb9c	469	mutex_lock(&sbi->vh_mutex);
dd73a01a CH	470	sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
	471	hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode,
	472	&str, sbi->hidden_dir);
7ac9fb9c CH	473	mutex_unlock(&sbi->vh_mutex);
7ac9fb9c CH	474
e3494705	475	hfsplus_mark_inode_dirty(sbi->hidden_dir, HFSPLUS_I_CAT_DIRTY);
1da177e4 LT	476	}
	477	out:
	478	unload_nls(sbi->nls);
	479	sbi->nls = nls;
	480	return 0;
	481
	482	cleanup:
	483	hfsplus_put_super(sb);
6d729e44	484	unload_nls(nls);
1da177e4 LT	485	return err;
	486	}
	487
	488	MODULE_AUTHOR("Brad Boyer");
	489	MODULE_DESCRIPTION("Extended Macintosh Filesystem");
	490	MODULE_LICENSE("GPL");
	491
e18b890b	492	static struct kmem_cache *hfsplus_inode_cachep;
1da177e4 LT	493
	494	static struct inode hfsplus_alloc_inode(struct super_block sb)
	495	{
	496	struct hfsplus_inode_info *i;
	497
e94b1766	498	i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
1da177e4 LT	499	return i ? &i->vfs_inode : NULL;
	500	}
	501
	502	static void hfsplus_destroy_inode(struct inode *inode)
	503	{
6af502de	504	kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
1da177e4 LT	505	}
	506
	507	#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
	508
152a0836 AV	509	static struct dentry hfsplus_mount(struct file_system_type fs_type,
152a0836 AV	510	int flags, const char dev_name, void data)
1da177e4	511	{
152a0836	512	return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
1da177e4 LT	513	}
	514
	515	static struct file_system_type hfsplus_fs_type = {
	516	.owner = THIS_MODULE,
	517	.name = "hfsplus",
152a0836	518	.mount = hfsplus_mount,
1da177e4 LT	519	.kill_sb = kill_block_super,
	520	.fs_flags = FS_REQUIRES_DEV,
	521	};
	522
51cc5068	523	static void hfsplus_init_once(void *p)
1da177e4 LT	524	{
	525	struct hfsplus_inode_info *i = p;
	526
a35afb83	527	inode_init_once(&i->vfs_inode);
1da177e4 LT	528	}
	529
	530	static int __init init_hfsplus_fs(void)
	531	{
	532	int err;
	533
	534	hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
	535	HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
20c2df83	536	hfsplus_init_once);
1da177e4 LT	537	if (!hfsplus_inode_cachep)
	538	return -ENOMEM;
	539	err = register_filesystem(&hfsplus_fs_type);
	540	if (err)
	541	kmem_cache_destroy(hfsplus_inode_cachep);
	542	return err;
	543	}
	544
	545	static void __exit exit_hfsplus_fs(void)
	546	{
	547	unregister_filesystem(&hfsplus_fs_type);
1a1d92c1	548	kmem_cache_destroy(hfsplus_inode_cachep);
1da177e4 LT	549	}
	550
	551	module_init(init_hfsplus_fs)
	552	module_exit(exit_hfsplus_fs)