[deliverable/linux.git] / fs / hfsplus / inode.c

/*
 *  linux/fs/hfsplus/inode.c
 *
 * Copyright (C) 2001
 * Brad Boyer (flar@allandria.com)
 * (C) 2003 Ardis Technologies <roman@ardistech.com>
 *
 * Inode handling routines
 */

#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/mpage.h>
#include <linux/sched.h>

#include "hfsplus_fs.h"
#include "hfsplus_raw.h"

static int hfsplus_readpage(struct file *file, struct page *page)
{
	return block_read_full_page(page, hfsplus_get_block);
}

static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
{
	return block_write_full_page(page, hfsplus_get_block, wbc);
}

static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
			loff_t pos, unsigned len, unsigned flags,
			struct page **pagep, void **fsdata)
{
	int ret;

	*pagep = NULL;
	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
				hfsplus_get_block,
				&HFSPLUS_I(mapping->host)->phys_size);
	if (unlikely(ret)) {
		loff_t isize = mapping->host->i_size;
		if (pos + len > isize)
			vmtruncate(mapping->host, isize);
	}

	return ret;
}

static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
{
	return generic_block_bmap(mapping, block, hfsplus_get_block);
}

static int hfsplus_releasepage(struct page *page, gfp_t mask)
{
	struct inode *inode = page->mapping->host;
	struct super_block *sb = inode->i_sb;
	struct hfs_btree *tree;
	struct hfs_bnode *node;
	u32 nidx;
	int i, res = 1;

	switch (inode->i_ino) {
	case HFSPLUS_EXT_CNID:
		tree = HFSPLUS_SB(sb)->ext_tree;
		break;
	case HFSPLUS_CAT_CNID:
		tree = HFSPLUS_SB(sb)->cat_tree;
		break;
	case HFSPLUS_ATTR_CNID:
		tree = HFSPLUS_SB(sb)->attr_tree;
		break;
	default:
		BUG();
		return 0;
	}
	if (!tree)
		return 0;
	if (tree->node_size >= PAGE_CACHE_SIZE) {
		nidx = page->index >>
			(tree->node_size_shift - PAGE_CACHE_SHIFT);
		spin_lock(&tree->hash_lock);
		node = hfs_bnode_findhash(tree, nidx);
		if (!node)
			;
		else if (atomic_read(&node->refcnt))
			res = 0;
		if (res && node) {
			hfs_bnode_unhash(node);
			hfs_bnode_free(node);
		}
		spin_unlock(&tree->hash_lock);
	} else {
		nidx = page->index <<
			(PAGE_CACHE_SHIFT - tree->node_size_shift);
		i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
		spin_lock(&tree->hash_lock);
		do {
			node = hfs_bnode_findhash(tree, nidx++);
			if (!node)
				continue;
			if (atomic_read(&node->refcnt)) {
				res = 0;
				break;
			}
			hfs_bnode_unhash(node);
			hfs_bnode_free(node);
		} while (--i && nidx < tree->node_count);
		spin_unlock(&tree->hash_lock);
	}
	return res ? try_to_free_buffers(page) : 0;
}

static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
		const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
	struct file *file = iocb->ki_filp;
	struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
	ssize_t ret;

	ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
				 hfsplus_get_block);

	/*
	 * In case of error extending write may have instantiated a few
	 * blocks outside i_size. Trim these off again.
	 */
	if (unlikely((rw & WRITE) && ret < 0)) {
		loff_t isize = i_size_read(inode);
		loff_t end = offset + iov_length(iov, nr_segs);

		if (end > isize)
			vmtruncate(inode, isize);
	}

	return ret;
}

static int hfsplus_writepages(struct address_space *mapping,
			      struct writeback_control *wbc)
{
	return mpage_writepages(mapping, wbc, hfsplus_get_block);
}

const struct address_space_operations hfsplus_btree_aops = {
	.readpage	= hfsplus_readpage,
	.writepage	= hfsplus_writepage,
	.write_begin	= hfsplus_write_begin,
	.write_end	= generic_write_end,
	.bmap		= hfsplus_bmap,
	.releasepage	= hfsplus_releasepage,
};

const struct address_space_operations hfsplus_aops = {
	.readpage	= hfsplus_readpage,
	.writepage	= hfsplus_writepage,
	.write_begin	= hfsplus_write_begin,
	.write_end	= generic_write_end,
	.bmap		= hfsplus_bmap,
	.direct_IO	= hfsplus_direct_IO,
	.writepages	= hfsplus_writepages,
};

const struct dentry_operations hfsplus_dentry_operations = {
	.d_hash       = hfsplus_hash_dentry,
	.d_compare    = hfsplus_compare_dentry,
};

static struct dentry *hfsplus_file_lookup(struct inode *dir,
		struct dentry *dentry, struct nameidata *nd)
{
	struct hfs_find_data fd;
	struct super_block *sb = dir->i_sb;
	struct inode *inode = NULL;
	struct hfsplus_inode_info *hip;
	int err;

	if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
		goto out;

	inode = HFSPLUS_I(dir)->rsrc_inode;
	if (inode)
		goto out;

	inode = new_inode(sb);
	if (!inode)
		return ERR_PTR(-ENOMEM);

	hip = HFSPLUS_I(inode);
	inode->i_ino = dir->i_ino;
	INIT_LIST_HEAD(&hip->open_dir_list);
	mutex_init(&hip->extents_lock);
	hip->extent_state = 0;
	hip->flags = 0;
	set_bit(HFSPLUS_I_RSRC, &hip->flags);

	hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
	err = hfsplus_find_cat(sb, dir->i_ino, &fd);
	if (!err)
		err = hfsplus_cat_read_inode(inode, &fd);
	hfs_find_exit(&fd);
	if (err) {
		iput(inode);
		return ERR_PTR(err);
	}
	hip->rsrc_inode = dir;
	HFSPLUS_I(dir)->rsrc_inode = inode;
	igrab(dir);

	/*
	 * __mark_inode_dirty expects inodes to be hashed.  Since we don't
	 * want resource fork inodes in the regular inode space, we make them
	 * appear hashed, but do not put on any lists.  hlist_del()
	 * will work fine and require no locking.
	 */
	hlist_add_fake(&inode->i_hash);

	mark_inode_dirty(inode);
out:
	d_add(dentry, inode);
	return NULL;
}

static void hfsplus_get_perms(struct inode *inode,
		struct hfsplus_perm *perms, int dir)
{
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
	u16 mode;

	mode = be16_to_cpu(perms->mode);

	inode->i_uid = be32_to_cpu(perms->owner);
	if (!inode->i_uid && !mode)
		inode->i_uid = sbi->uid;

	inode->i_gid = be32_to_cpu(perms->group);
	if (!inode->i_gid && !mode)
		inode->i_gid = sbi->gid;

	if (dir) {
		mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
		mode |= S_IFDIR;
	} else if (!mode)
		mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
	inode->i_mode = mode;

	HFSPLUS_I(inode)->userflags = perms->userflags;
	if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
		inode->i_flags |= S_IMMUTABLE;
	else
		inode->i_flags &= ~S_IMMUTABLE;
	if (perms->rootflags & HFSPLUS_FLG_APPEND)
		inode->i_flags |= S_APPEND;
	else
		inode->i_flags &= ~S_APPEND;
}

static int hfsplus_file_open(struct inode *inode, struct file *file)
{
	if (HFSPLUS_IS_RSRC(inode))
		inode = HFSPLUS_I(inode)->rsrc_inode;
	if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
		return -EOVERFLOW;
	atomic_inc(&HFSPLUS_I(inode)->opencnt);
	return 0;
}

static int hfsplus_file_release(struct inode *inode, struct file *file)
{
	struct super_block *sb = inode->i_sb;

	if (HFSPLUS_IS_RSRC(inode))
		inode = HFSPLUS_I(inode)->rsrc_inode;
	if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
		mutex_lock(&inode->i_mutex);
		hfsplus_file_truncate(inode);
		if (inode->i_flags & S_DEAD) {
			hfsplus_delete_cat(inode->i_ino,
					   HFSPLUS_SB(sb)->hidden_dir, NULL);
			hfsplus_delete_inode(inode);
		}
		mutex_unlock(&inode->i_mutex);
	}
	return 0;
}

static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = dentry->d_inode;
	int error;

	error = inode_change_ok(inode, attr);
	if (error)
		return error;

	if ((attr->ia_valid & ATTR_SIZE) &&
	    attr->ia_size != i_size_read(inode)) {
		inode_dio_wait(inode);

		error = vmtruncate(inode, attr->ia_size);
		if (error)
			return error;
	}

	setattr_copy(inode, attr);
	mark_inode_dirty(inode);
	return 0;
}

int hfsplus_file_fsync(struct file *file, int datasync)
{
	struct inode *inode = file->f_mapping->host;
	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
	int error = 0, error2;

	/*
	 * Sync inode metadata into the catalog and extent trees.
	 */
	sync_inode_metadata(inode, 1);

	/*
	 * And explicitly write out the btrees.
	 */
	if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
		error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);

	if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
		error2 =
			filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
		if (!error)
			error = error2;
	}

	if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
		error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
		if (!error)
			error = error2;
	}

	if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
		blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);

	return error;
}

static const struct inode_operations hfsplus_file_inode_operations = {
	.lookup		= hfsplus_file_lookup,
	.truncate	= hfsplus_file_truncate,
	.setattr	= hfsplus_setattr,
	.setxattr	= hfsplus_setxattr,
	.getxattr	= hfsplus_getxattr,
	.listxattr	= hfsplus_listxattr,
};

static const struct file_operations hfsplus_file_operations = {
	.llseek		= generic_file_llseek,
	.read		= do_sync_read,
	.aio_read	= generic_file_aio_read,
	.write		= do_sync_write,
	.aio_write	= generic_file_aio_write,
	.mmap		= generic_file_mmap,
	.splice_read	= generic_file_splice_read,
	.fsync		= hfsplus_file_fsync,
	.open		= hfsplus_file_open,
	.release	= hfsplus_file_release,
	.unlocked_ioctl = hfsplus_ioctl,
};

struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
{
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	struct inode *inode = new_inode(sb);
	struct hfsplus_inode_info *hip;

	if (!inode)
		return NULL;

	inode->i_ino = sbi->next_cnid++;
	inode->i_mode = mode;
	inode->i_uid = current_fsuid();
	inode->i_gid = current_fsgid();
	inode->i_nlink = 1;
	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;

	hip = HFSPLUS_I(inode);
	INIT_LIST_HEAD(&hip->open_dir_list);
	mutex_init(&hip->extents_lock);
	atomic_set(&hip->opencnt, 0);
	hip->extent_state = 0;
	hip->flags = 0;
	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	hip->alloc_blocks = 0;
	hip->first_blocks = 0;
	hip->cached_start = 0;
	hip->cached_blocks = 0;
	hip->phys_size = 0;
	hip->fs_blocks = 0;
	hip->rsrc_inode = NULL;
	if (S_ISDIR(inode->i_mode)) {
		inode->i_size = 2;
		sbi->folder_count++;
		inode->i_op = &hfsplus_dir_inode_operations;
		inode->i_fop = &hfsplus_dir_operations;
	} else if (S_ISREG(inode->i_mode)) {
		sbi->file_count++;
		inode->i_op = &hfsplus_file_inode_operations;
		inode->i_fop = &hfsplus_file_operations;
		inode->i_mapping->a_ops = &hfsplus_aops;
		hip->clump_blocks = sbi->data_clump_blocks;
	} else if (S_ISLNK(inode->i_mode)) {
		sbi->file_count++;
		inode->i_op = &page_symlink_inode_operations;
		inode->i_mapping->a_ops = &hfsplus_aops;
		hip->clump_blocks = 1;
	} else
		sbi->file_count++;
	insert_inode_hash(inode);
	mark_inode_dirty(inode);
	sb->s_dirt = 1;

	return inode;
}

void hfsplus_delete_inode(struct inode *inode)
{
	struct super_block *sb = inode->i_sb;

	if (S_ISDIR(inode->i_mode)) {
		HFSPLUS_SB(sb)->folder_count--;
		sb->s_dirt = 1;
		return;
	}
	HFSPLUS_SB(sb)->file_count--;
	if (S_ISREG(inode->i_mode)) {
		if (!inode->i_nlink) {
			inode->i_size = 0;
			hfsplus_file_truncate(inode);
		}
	} else if (S_ISLNK(inode->i_mode)) {
		inode->i_size = 0;
		hfsplus_file_truncate(inode);
	}
	sb->s_dirt = 1;
}

void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
{
	struct super_block *sb = inode->i_sb;
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	u32 count;
	int i;

	memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
	for (count = 0, i = 0; i < 8; i++)
		count += be32_to_cpu(fork->extents[i].block_count);
	hip->first_blocks = count;
	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	hip->cached_start = 0;
	hip->cached_blocks = 0;

	hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
	hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
	hip->fs_blocks =
		(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
	inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
	hip->clump_blocks =
		be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
	if (!hip->clump_blocks) {
		hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
			sbi->rsrc_clump_blocks :
			sbi->data_clump_blocks;
	}
}

void hfsplus_inode_write_fork(struct inode *inode,
		struct hfsplus_fork_raw *fork)
{
	memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
	       sizeof(hfsplus_extent_rec));
	fork->total_size = cpu_to_be64(inode->i_size);
	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
}

int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
{
	hfsplus_cat_entry entry;
	int res = 0;
	u16 type;

	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);

	HFSPLUS_I(inode)->linkid = 0;
	if (type == HFSPLUS_FOLDER) {
		struct hfsplus_cat_folder *folder = &entry.folder;

		if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
			/* panic? */;
		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
					sizeof(struct hfsplus_cat_folder));
		hfsplus_get_perms(inode, &folder->permissions, 1);
		inode->i_nlink = 1;
		inode->i_size = 2 + be32_to_cpu(folder->valence);
		inode->i_atime = hfsp_mt2ut(folder->access_date);
		inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
		inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
		HFSPLUS_I(inode)->create_date = folder->create_date;
		HFSPLUS_I(inode)->fs_blocks = 0;
		inode->i_op = &hfsplus_dir_inode_operations;
		inode->i_fop = &hfsplus_dir_operations;
	} else if (type == HFSPLUS_FILE) {
		struct hfsplus_cat_file *file = &entry.file;

		if (fd->entrylength < sizeof(struct hfsplus_cat_file))
			/* panic? */;
		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
					sizeof(struct hfsplus_cat_file));

		hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
					&file->rsrc_fork : &file->data_fork);
		hfsplus_get_perms(inode, &file->permissions, 0);
		inode->i_nlink = 1;
		if (S_ISREG(inode->i_mode)) {
			if (file->permissions.dev)
				inode->i_nlink =
					be32_to_cpu(file->permissions.dev);
			inode->i_op = &hfsplus_file_inode_operations;
			inode->i_fop = &hfsplus_file_operations;
			inode->i_mapping->a_ops = &hfsplus_aops;
		} else if (S_ISLNK(inode->i_mode)) {
			inode->i_op = &page_symlink_inode_operations;
			inode->i_mapping->a_ops = &hfsplus_aops;
		} else {
			init_special_inode(inode, inode->i_mode,
					   be32_to_cpu(file->permissions.dev));
		}
		inode->i_atime = hfsp_mt2ut(file->access_date);
		inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
		inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
		HFSPLUS_I(inode)->create_date = file->create_date;
	} else {
		printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
		res = -EIO;
	}
	return res;
}

int hfsplus_cat_write_inode(struct inode *inode)
{
	struct inode *main_inode = inode;
	struct hfs_find_data fd;
	hfsplus_cat_entry entry;

	if (HFSPLUS_IS_RSRC(inode))
		main_inode = HFSPLUS_I(inode)->rsrc_inode;

	if (!main_inode->i_nlink)
		return 0;

	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
		/* panic? */
		return -EIO;

	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
		/* panic? */
		goto out;

	if (S_ISDIR(main_inode->i_mode)) {
		struct hfsplus_cat_folder *folder = &entry.folder;

		if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
			/* panic? */;
		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
					sizeof(struct hfsplus_cat_folder));
		/* simple node checks? */
		hfsplus_cat_set_perms(inode, &folder->permissions);
		folder->access_date = hfsp_ut2mt(inode->i_atime);
		folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
		folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
		folder->valence = cpu_to_be32(inode->i_size - 2);
		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
					 sizeof(struct hfsplus_cat_folder));
	} else if (HFSPLUS_IS_RSRC(inode)) {
		struct hfsplus_cat_file *file = &entry.file;
		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
			       sizeof(struct hfsplus_cat_file));
		hfsplus_inode_write_fork(inode, &file->rsrc_fork);
		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
				sizeof(struct hfsplus_cat_file));
	} else {
		struct hfsplus_cat_file *file = &entry.file;

		if (fd.entrylength < sizeof(struct hfsplus_cat_file))
			/* panic? */;
		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
					sizeof(struct hfsplus_cat_file));
		hfsplus_inode_write_fork(inode, &file->data_fork);
		hfsplus_cat_set_perms(inode, &file->permissions);
		if (HFSPLUS_FLG_IMMUTABLE &
				(file->permissions.rootflags |
					file->permissions.userflags))
			file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
		else
			file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
		file->access_date = hfsp_ut2mt(inode->i_atime);
		file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
		file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
					 sizeof(struct hfsplus_cat_file));
	}

	set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
out:
	hfs_find_exit(&fd);
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/hfsplus/inode.c
	3	*
	4	* Copyright (C) 2001
	5	* Brad Boyer (flar@allandria.com)
	6	* (C) 2003 Ardis Technologies <roman@ardistech.com>
	7	*
	8	* Inode handling routines
	9	*/
	10
34a2d313	11	#include <linux/blkdev.h>
1da177e4 LT	12	#include <linux/mm.h>
	13	#include <linux/fs.h>
	14	#include <linux/pagemap.h>
1da177e4	15	#include <linux/mpage.h>
e8edc6e0	16	#include <linux/sched.h>
1da177e4 LT	17
	18	#include "hfsplus_fs.h"
	19	#include "hfsplus_raw.h"
	20
	21	static int hfsplus_readpage(struct file file, struct page page)
	22	{
1da177e4 LT	23	return block_read_full_page(page, hfsplus_get_block);
	24	}
	25
	26	static int hfsplus_writepage(struct page page, struct writeback_control wbc)
	27	{
1da177e4 LT	28	return block_write_full_page(page, hfsplus_get_block, wbc);
	29	}
	30
7c0efc62 NP	31	static int hfsplus_write_begin(struct file file, struct address_space mapping,
	32	loff_t pos, unsigned len, unsigned flags,
	33	struct page pagep, void fsdata)
1da177e4	34	{
282dc178 CH	35	int ret;
282dc178 CH	36
7c0efc62	37	*pagep = NULL;
282dc178	38	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
7c0efc62	39	hfsplus_get_block,
6af502de	40	&HFSPLUS_I(mapping->host)->phys_size);
282dc178 CH	41	if (unlikely(ret)) {
	42	loff_t isize = mapping->host->i_size;
	43	if (pos + len > isize)
	44	vmtruncate(mapping->host, isize);
	45	}
	46
	47	return ret;
1da177e4 LT	48	}
	49
	50	static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
	51	{
	52	return generic_block_bmap(mapping, block, hfsplus_get_block);
	53	}
	54
27496a8c	55	static int hfsplus_releasepage(struct page *page, gfp_t mask)
1da177e4 LT	56	{
	57	struct inode *inode = page->mapping->host;
	58	struct super_block *sb = inode->i_sb;
	59	struct hfs_btree *tree;
	60	struct hfs_bnode *node;
	61	u32 nidx;
	62	int i, res = 1;
	63
	64	switch (inode->i_ino) {
	65	case HFSPLUS_EXT_CNID:
dd73a01a	66	tree = HFSPLUS_SB(sb)->ext_tree;
1da177e4 LT	67	break;
1da177e4 LT	68	case HFSPLUS_CAT_CNID:
dd73a01a	69	tree = HFSPLUS_SB(sb)->cat_tree;
1da177e4 LT	70	break;
1da177e4 LT	71	case HFSPLUS_ATTR_CNID:
dd73a01a	72	tree = HFSPLUS_SB(sb)->attr_tree;
1da177e4 LT	73	break;
	74	default:
	75	BUG();
	76	return 0;
	77	}
70632249 ES	78	if (!tree)
70632249 ES	79	return 0;
1da177e4	80	if (tree->node_size >= PAGE_CACHE_SIZE) {
2753cc28 AS	81	nidx = page->index >>
2753cc28 AS	82	(tree->node_size_shift - PAGE_CACHE_SHIFT);
1da177e4 LT	83	spin_lock(&tree->hash_lock);
	84	node = hfs_bnode_findhash(tree, nidx);
	85	if (!node)
	86	;
	87	else if (atomic_read(&node->refcnt))
	88	res = 0;
	89	if (res && node) {
	90	hfs_bnode_unhash(node);
	91	hfs_bnode_free(node);
	92	}
	93	spin_unlock(&tree->hash_lock);
	94	} else {
2753cc28 AS	95	nidx = page->index <<
2753cc28 AS	96	(PAGE_CACHE_SHIFT - tree->node_size_shift);
1da177e4 LT	97	i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
	98	spin_lock(&tree->hash_lock);
	99	do {
	100	node = hfs_bnode_findhash(tree, nidx++);
	101	if (!node)
	102	continue;
	103	if (atomic_read(&node->refcnt)) {
	104	res = 0;
	105	break;
	106	}
	107	hfs_bnode_unhash(node);
	108	hfs_bnode_free(node);
	109	} while (--i && nidx < tree->node_count);
	110	spin_unlock(&tree->hash_lock);
	111	}
1da177e4 LT	112	return res ? try_to_free_buffers(page) : 0;
	113	}
	114
1da177e4 LT	115	static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
	116	const struct iovec *iov, loff_t offset, unsigned long nr_segs)
	117	{
	118	struct file *file = iocb->ki_filp;
f44ea031	119	struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
eafdc7d1	120	ssize_t ret;
1da177e4	121
aacfc19c CH	122	ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
aacfc19c CH	123	hfsplus_get_block);
eafdc7d1 CH	124
	125	/*
	126	* In case of error extending write may have instantiated a few
	127	* blocks outside i_size. Trim these off again.
	128	*/
	129	if (unlikely((rw & WRITE) && ret < 0)) {
	130	loff_t isize = i_size_read(inode);
	131	loff_t end = offset + iov_length(iov, nr_segs);
	132
	133	if (end > isize)
	134	vmtruncate(inode, isize);
	135	}
	136
	137	return ret;
1da177e4 LT	138	}
	139
	140	static int hfsplus_writepages(struct address_space *mapping,
	141	struct writeback_control *wbc)
	142	{
	143	return mpage_writepages(mapping, wbc, hfsplus_get_block);
	144	}
	145
f5e54d6e	146	const struct address_space_operations hfsplus_btree_aops = {
1da177e4 LT	147	.readpage = hfsplus_readpage,
1da177e4 LT	148	.writepage = hfsplus_writepage,
7c0efc62 NP	149	.write_begin = hfsplus_write_begin,
7c0efc62 NP	150	.write_end = generic_write_end,
1da177e4 LT	151	.bmap = hfsplus_bmap,
	152	.releasepage = hfsplus_releasepage,
	153	};
	154
f5e54d6e	155	const struct address_space_operations hfsplus_aops = {
1da177e4 LT	156	.readpage = hfsplus_readpage,
1da177e4 LT	157	.writepage = hfsplus_writepage,
7c0efc62 NP	158	.write_begin = hfsplus_write_begin,
7c0efc62 NP	159	.write_end = generic_write_end,
1da177e4 LT	160	.bmap = hfsplus_bmap,
	161	.direct_IO = hfsplus_direct_IO,
	162	.writepages = hfsplus_writepages,
	163	};
	164
e16404ed	165	const struct dentry_operations hfsplus_dentry_operations = {
d45bce8f DG	166	.d_hash = hfsplus_hash_dentry,
	167	.d_compare = hfsplus_compare_dentry,
	168	};
	169
2753cc28 AS	170	static struct dentry hfsplus_file_lookup(struct inode dir,
2753cc28 AS	171	struct dentry dentry, struct nameidata nd)
1da177e4 LT	172	{
	173	struct hfs_find_data fd;
	174	struct super_block *sb = dir->i_sb;
	175	struct inode *inode = NULL;
6af502de	176	struct hfsplus_inode_info *hip;
1da177e4 LT	177	int err;
	178
	179	if (HFSPLUS_IS_RSRC(dir) \|\| strcmp(dentry->d_name.name, "rsrc"))
	180	goto out;
	181
6af502de	182	inode = HFSPLUS_I(dir)->rsrc_inode;
1da177e4 LT	183	if (inode)
	184	goto out;
	185
	186	inode = new_inode(sb);
	187	if (!inode)
	188	return ERR_PTR(-ENOMEM);
	189
6af502de	190	hip = HFSPLUS_I(inode);
1da177e4	191	inode->i_ino = dir->i_ino;
6af502de CH	192	INIT_LIST_HEAD(&hip->open_dir_list);
6af502de CH	193	mutex_init(&hip->extents_lock);
b33b7921 CH	194	hip->extent_state = 0;
	195	hip->flags = 0;
	196	set_bit(HFSPLUS_I_RSRC, &hip->flags);
1da177e4	197
dd73a01a	198	hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
1da177e4 LT	199	err = hfsplus_find_cat(sb, dir->i_ino, &fd);
	200	if (!err)
	201	err = hfsplus_cat_read_inode(inode, &fd);
	202	hfs_find_exit(&fd);
	203	if (err) {
	204	iput(inode);
	205	return ERR_PTR(err);
	206	}
6af502de CH	207	hip->rsrc_inode = dir;
6af502de CH	208	HFSPLUS_I(dir)->rsrc_inode = inode;
1da177e4	209	igrab(dir);
58a818f5 CH	210
	211	/*
	212	* __mark_inode_dirty expects inodes to be hashed. Since we don't
	213	* want resource fork inodes in the regular inode space, we make them
	214	* appear hashed, but do not put on any lists. hlist_del()
	215	* will work fine and require no locking.
	216	*/
756acc2d	217	hlist_add_fake(&inode->i_hash);
58a818f5	218
1da177e4	219	mark_inode_dirty(inode);
1da177e4 LT	220	out:
	221	d_add(dentry, inode);
	222	return NULL;
	223	}
	224
2753cc28 AS	225	static void hfsplus_get_perms(struct inode *inode,
2753cc28 AS	226	struct hfsplus_perm *perms, int dir)
1da177e4	227	{
dd73a01a	228	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
1da177e4 LT	229	u16 mode;
	230
	231	mode = be16_to_cpu(perms->mode);
	232
	233	inode->i_uid = be32_to_cpu(perms->owner);
	234	if (!inode->i_uid && !mode)
dd73a01a	235	inode->i_uid = sbi->uid;
1da177e4 LT	236
	237	inode->i_gid = be32_to_cpu(perms->group);
	238	if (!inode->i_gid && !mode)
dd73a01a	239	inode->i_gid = sbi->gid;
1da177e4 LT	240
1da177e4 LT	241	if (dir) {
dd73a01a	242	mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
1da177e4 LT	243	mode \|= S_IFDIR;
1da177e4 LT	244	} else if (!mode)
dd73a01a	245	mode = S_IFREG \| ((S_IRUGO\|S_IWUGO) & ~(sbi->umask));
1da177e4 LT	246	inode->i_mode = mode;
1da177e4 LT	247
6af502de	248	HFSPLUS_I(inode)->userflags = perms->userflags;
1da177e4 LT	249	if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
	250	inode->i_flags \|= S_IMMUTABLE;
	251	else
	252	inode->i_flags &= ~S_IMMUTABLE;
	253	if (perms->rootflags & HFSPLUS_FLG_APPEND)
	254	inode->i_flags \|= S_APPEND;
	255	else
	256	inode->i_flags &= ~S_APPEND;
	257	}
	258
1da177e4 LT	259	static int hfsplus_file_open(struct inode inode, struct file file)
	260	{
	261	if (HFSPLUS_IS_RSRC(inode))
6af502de	262	inode = HFSPLUS_I(inode)->rsrc_inode;
6e715294 AC	263	if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
6e715294 AC	264	return -EOVERFLOW;
6af502de	265	atomic_inc(&HFSPLUS_I(inode)->opencnt);
1da177e4 LT	266	return 0;
	267	}
	268
	269	static int hfsplus_file_release(struct inode inode, struct file file)
	270	{
	271	struct super_block *sb = inode->i_sb;
	272
	273	if (HFSPLUS_IS_RSRC(inode))
6af502de CH	274	inode = HFSPLUS_I(inode)->rsrc_inode;
6af502de CH	275	if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
1b1dcc1b	276	mutex_lock(&inode->i_mutex);
1da177e4 LT	277	hfsplus_file_truncate(inode);
1da177e4 LT	278	if (inode->i_flags & S_DEAD) {
dd73a01a CH	279	hfsplus_delete_cat(inode->i_ino,
dd73a01a CH	280	HFSPLUS_SB(sb)->hidden_dir, NULL);
1da177e4 LT	281	hfsplus_delete_inode(inode);
1da177e4 LT	282	}
1b1dcc1b	283	mutex_unlock(&inode->i_mutex);
1da177e4 LT	284	}
	285	return 0;
	286	}
	287
d39aae9e CH	288	static int hfsplus_setattr(struct dentry dentry, struct iattr attr)
	289	{
	290	struct inode *inode = dentry->d_inode;
	291	int error;
	292
	293	error = inode_change_ok(inode, attr);
	294	if (error)
	295	return error;
1025774c CH	296
	297	if ((attr->ia_valid & ATTR_SIZE) &&
	298	attr->ia_size != i_size_read(inode)) {
562c72aa CH	299	inode_dio_wait(inode);
562c72aa CH	300
1025774c CH	301	error = vmtruncate(inode, attr->ia_size);
	302	if (error)
	303	return error;
	304	}
	305
	306	setattr_copy(inode, attr);
	307	mark_inode_dirty(inode);
	308	return 0;
d39aae9e CH	309	}
d39aae9e CH	310
eb29d66d	311	int hfsplus_file_fsync(struct file *file, int datasync)
b5fc510c	312	{
28146976	313	struct inode *inode = file->f_mapping->host;
e3494705	314	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
28146976	315	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
e3494705	316	int error = 0, error2;
b5fc510c	317
28146976 CH	318	/*
	319	* Sync inode metadata into the catalog and extent trees.
	320	*/
	321	sync_inode_metadata(inode, 1);
	322
	323	/*
	324	* And explicitly write out the btrees.
	325	*/
e3494705 CH	326	if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
	327	error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
	328
	329	if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
2753cc28 AS	330	error2 =
2753cc28 AS	331	filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
e3494705 CH	332	if (!error)
	333	error = error2;
	334	}
	335
	336	if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
	337	error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
	338	if (!error)
	339	error = error2;
	340	}
	341
34a2d313 CH	342	if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
	343	blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
	344
28146976	345	return error;
b5fc510c AV	346	}
b5fc510c AV	347
92e1d5be	348	static const struct inode_operations hfsplus_file_inode_operations = {
1da177e4 LT	349	.lookup = hfsplus_file_lookup,
1da177e4 LT	350	.truncate = hfsplus_file_truncate,
d39aae9e	351	.setattr = hfsplus_setattr,
1da177e4 LT	352	.setxattr = hfsplus_setxattr,
	353	.getxattr = hfsplus_getxattr,
	354	.listxattr = hfsplus_listxattr,
	355	};
	356
4b6f5d20	357	static const struct file_operations hfsplus_file_operations = {
20b7643d	358	.llseek = generic_file_llseek,
543ade1f BP	359	.read = do_sync_read,
	360	.aio_read = generic_file_aio_read,
	361	.write = do_sync_write,
	362	.aio_write = generic_file_aio_write,
1da177e4	363	.mmap = generic_file_mmap,
5ffc4ef4	364	.splice_read = generic_file_splice_read,
b5fc510c	365	.fsync = hfsplus_file_fsync,
1da177e4 LT	366	.open = hfsplus_file_open,
1da177e4 LT	367	.release = hfsplus_file_release,
7cc4bcc6	368	.unlocked_ioctl = hfsplus_ioctl,
1da177e4 LT	369	};
	370
	371	struct inode hfsplus_new_inode(struct super_block sb, int mode)
	372	{
dd73a01a	373	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
1da177e4	374	struct inode *inode = new_inode(sb);
6af502de	375	struct hfsplus_inode_info *hip;
dd73a01a	376
1da177e4 LT	377	if (!inode)
	378	return NULL;
	379
dd73a01a	380	inode->i_ino = sbi->next_cnid++;
1da177e4	381	inode->i_mode = mode;
4ac8489a DH	382	inode->i_uid = current_fsuid();
4ac8489a DH	383	inode->i_gid = current_fsgid();
1da177e4 LT	384	inode->i_nlink = 1;
1da177e4 LT	385	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
6af502de CH	386
	387	hip = HFSPLUS_I(inode);
	388	INIT_LIST_HEAD(&hip->open_dir_list);
	389	mutex_init(&hip->extents_lock);
	390	atomic_set(&hip->opencnt, 0);
b33b7921	391	hip->extent_state = 0;
6af502de CH	392	hip->flags = 0;
	393	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
	394	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	395	hip->alloc_blocks = 0;
	396	hip->first_blocks = 0;
	397	hip->cached_start = 0;
	398	hip->cached_blocks = 0;
	399	hip->phys_size = 0;
	400	hip->fs_blocks = 0;
	401	hip->rsrc_inode = NULL;
1da177e4 LT	402	if (S_ISDIR(inode->i_mode)) {
1da177e4 LT	403	inode->i_size = 2;
dd73a01a	404	sbi->folder_count++;
1da177e4 LT	405	inode->i_op = &hfsplus_dir_inode_operations;
	406	inode->i_fop = &hfsplus_dir_operations;
	407	} else if (S_ISREG(inode->i_mode)) {
dd73a01a	408	sbi->file_count++;
1da177e4 LT	409	inode->i_op = &hfsplus_file_inode_operations;
	410	inode->i_fop = &hfsplus_file_operations;
	411	inode->i_mapping->a_ops = &hfsplus_aops;
6af502de	412	hip->clump_blocks = sbi->data_clump_blocks;
1da177e4	413	} else if (S_ISLNK(inode->i_mode)) {
dd73a01a	414	sbi->file_count++;
1da177e4 LT	415	inode->i_op = &page_symlink_inode_operations;
1da177e4 LT	416	inode->i_mapping->a_ops = &hfsplus_aops;
6af502de	417	hip->clump_blocks = 1;
1da177e4	418	} else
dd73a01a	419	sbi->file_count++;
1da177e4 LT	420	insert_inode_hash(inode);
	421	mark_inode_dirty(inode);
	422	sb->s_dirt = 1;
	423
	424	return inode;
	425	}
	426
	427	void hfsplus_delete_inode(struct inode *inode)
	428	{
	429	struct super_block *sb = inode->i_sb;
	430
	431	if (S_ISDIR(inode->i_mode)) {
dd73a01a	432	HFSPLUS_SB(sb)->folder_count--;
1da177e4 LT	433	sb->s_dirt = 1;
	434	return;
	435	}
dd73a01a	436	HFSPLUS_SB(sb)->file_count--;
1da177e4 LT	437	if (S_ISREG(inode->i_mode)) {
	438	if (!inode->i_nlink) {
	439	inode->i_size = 0;
	440	hfsplus_file_truncate(inode);
	441	}
	442	} else if (S_ISLNK(inode->i_mode)) {
	443	inode->i_size = 0;
	444	hfsplus_file_truncate(inode);
	445	}
	446	sb->s_dirt = 1;
	447	}
	448
	449	void hfsplus_inode_read_fork(struct inode inode, struct hfsplus_fork_raw fork)
	450	{
	451	struct super_block *sb = inode->i_sb;
dd73a01a	452	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
6af502de	453	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
1da177e4 LT	454	u32 count;
	455	int i;
	456
6af502de	457	memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
1da177e4 LT	458	for (count = 0, i = 0; i < 8; i++)
1da177e4 LT	459	count += be32_to_cpu(fork->extents[i].block_count);
6af502de CH	460	hip->first_blocks = count;
	461	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	462	hip->cached_start = 0;
	463	hip->cached_blocks = 0;
	464
	465	hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
	466	hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
	467	hip->fs_blocks =
	468	(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
	469	inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
	470	hip->clump_blocks =
dd73a01a	471	be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
6af502de CH	472	if (!hip->clump_blocks) {
6af502de CH	473	hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
dd73a01a CH	474	sbi->rsrc_clump_blocks :
	475	sbi->data_clump_blocks;
	476	}
1da177e4 LT	477	}
1da177e4 LT	478
2753cc28 AS	479	void hfsplus_inode_write_fork(struct inode *inode,
2753cc28 AS	480	struct hfsplus_fork_raw *fork)
1da177e4	481	{
6af502de	482	memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
1da177e4 LT	483	sizeof(hfsplus_extent_rec));
1da177e4 LT	484	fork->total_size = cpu_to_be64(inode->i_size);
6af502de	485	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
1da177e4 LT	486	}
	487
	488	int hfsplus_cat_read_inode(struct inode inode, struct hfs_find_data fd)
	489	{
	490	hfsplus_cat_entry entry;
	491	int res = 0;
	492	u16 type;
	493
	494	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
	495
f6089ff8	496	HFSPLUS_I(inode)->linkid = 0;
1da177e4 LT	497	if (type == HFSPLUS_FOLDER) {
	498	struct hfsplus_cat_folder *folder = &entry.folder;
	499
	500	if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
	501	/* panic? */;
	502	hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
	503	sizeof(struct hfsplus_cat_folder));
	504	hfsplus_get_perms(inode, &folder->permissions, 1);
	505	inode->i_nlink = 1;
	506	inode->i_size = 2 + be32_to_cpu(folder->valence);
	507	inode->i_atime = hfsp_mt2ut(folder->access_date);
	508	inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
9a4cad95	509	inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
6af502de CH	510	HFSPLUS_I(inode)->create_date = folder->create_date;
6af502de CH	511	HFSPLUS_I(inode)->fs_blocks = 0;
1da177e4 LT	512	inode->i_op = &hfsplus_dir_inode_operations;
	513	inode->i_fop = &hfsplus_dir_operations;
	514	} else if (type == HFSPLUS_FILE) {
	515	struct hfsplus_cat_file *file = &entry.file;
	516
	517	if (fd->entrylength < sizeof(struct hfsplus_cat_file))
	518	/* panic? */;
	519	hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
	520	sizeof(struct hfsplus_cat_file));
	521
b33b7921 CH	522	hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
b33b7921 CH	523	&file->rsrc_fork : &file->data_fork);
1da177e4 LT	524	hfsplus_get_perms(inode, &file->permissions, 0);
	525	inode->i_nlink = 1;
	526	if (S_ISREG(inode->i_mode)) {
	527	if (file->permissions.dev)
2753cc28 AS	528	inode->i_nlink =
2753cc28 AS	529	be32_to_cpu(file->permissions.dev);
1da177e4 LT	530	inode->i_op = &hfsplus_file_inode_operations;
	531	inode->i_fop = &hfsplus_file_operations;
	532	inode->i_mapping->a_ops = &hfsplus_aops;
	533	} else if (S_ISLNK(inode->i_mode)) {
	534	inode->i_op = &page_symlink_inode_operations;
	535	inode->i_mapping->a_ops = &hfsplus_aops;
	536	} else {
	537	init_special_inode(inode, inode->i_mode,
	538	be32_to_cpu(file->permissions.dev));
	539	}
	540	inode->i_atime = hfsp_mt2ut(file->access_date);
	541	inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
9a4cad95	542	inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
6af502de	543	HFSPLUS_I(inode)->create_date = file->create_date;
1da177e4	544	} else {
634725a9	545	printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
1da177e4 LT	546	res = -EIO;
	547	}
	548	return res;
	549	}
	550
	551	int hfsplus_cat_write_inode(struct inode *inode)
	552	{
	553	struct inode *main_inode = inode;
	554	struct hfs_find_data fd;
	555	hfsplus_cat_entry entry;
	556
	557	if (HFSPLUS_IS_RSRC(inode))
6af502de	558	main_inode = HFSPLUS_I(inode)->rsrc_inode;
1da177e4 LT	559
	560	if (!main_inode->i_nlink)
	561	return 0;
	562
dd73a01a	563	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
1da177e4 LT	564	/* panic? */
	565	return -EIO;
	566
	567	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
	568	/* panic? */
	569	goto out;
	570
	571	if (S_ISDIR(main_inode->i_mode)) {
	572	struct hfsplus_cat_folder *folder = &entry.folder;
	573
	574	if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
	575	/* panic? */;
	576	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	577	sizeof(struct hfsplus_cat_folder));
	578	/* simple node checks? */
90e61690	579	hfsplus_cat_set_perms(inode, &folder->permissions);
1da177e4 LT	580	folder->access_date = hfsp_ut2mt(inode->i_atime);
	581	folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
	582	folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
	583	folder->valence = cpu_to_be32(inode->i_size - 2);
	584	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	585	sizeof(struct hfsplus_cat_folder));
	586	} else if (HFSPLUS_IS_RSRC(inode)) {
	587	struct hfsplus_cat_file *file = &entry.file;
	588	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	589	sizeof(struct hfsplus_cat_file));
	590	hfsplus_inode_write_fork(inode, &file->rsrc_fork);
	591	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	592	sizeof(struct hfsplus_cat_file));
	593	} else {
	594	struct hfsplus_cat_file *file = &entry.file;
	595
	596	if (fd.entrylength < sizeof(struct hfsplus_cat_file))
	597	/* panic? */;
	598	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	599	sizeof(struct hfsplus_cat_file));
	600	hfsplus_inode_write_fork(inode, &file->data_fork);
90e61690	601	hfsplus_cat_set_perms(inode, &file->permissions);
2753cc28 AS	602	if (HFSPLUS_FLG_IMMUTABLE &
	603	(file->permissions.rootflags \|
	604	file->permissions.userflags))
1da177e4 LT	605	file->flags \|= cpu_to_be16(HFSPLUS_FILE_LOCKED);
	606	else
	607	file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
	608	file->access_date = hfsp_ut2mt(inode->i_atime);
	609	file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
	610	file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
	611	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	612	sizeof(struct hfsplus_cat_file));
	613	}
e3494705 CH	614
e3494705 CH	615	set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
1da177e4 LT	616	out:
	617	hfs_find_exit(&fd);
	618	return 0;
	619	}