[mirror_ubuntu-eoan-kernel.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/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, inode->i_sb->s_bdev, iov,
				  offset, nr_segs, hfsplus_get_block, NULL);

	/*
	 * 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,
	.sync_page	= block_sync_page,
	.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,
	.sync_page	= block_sync_page,
	.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->flags = HFSPLUS_FLG_RSRC;

	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.
	 */
	inode->i_hash.pprev = &inode->i_hash.next;

	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)->rootflags = perms->rootflags;
	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 void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
{
	if (inode->i_flags & S_IMMUTABLE)
		perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
	else
		perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
	if (inode->i_flags & S_APPEND)
		perms->rootflags |= HFSPLUS_FLG_APPEND;
	else
		perms->rootflags &= ~HFSPLUS_FLG_APPEND;
	perms->userflags = HFSPLUS_I(inode)->userflags;
	perms->mode = cpu_to_be16(inode->i_mode);
	perms->owner = cpu_to_be32(inode->i_uid);
	perms->group = cpu_to_be32(inode->i_gid);
	perms->dev = cpu_to_be32(HFSPLUS_I(inode)->dev);
}

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

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

static int hfsplus_file_fsync(struct file *filp, int datasync)
{
	struct inode *inode = filp->f_mapping->host;
	struct super_block * sb;
	int ret, err;

	/* sync the inode to buffers */
	ret = write_inode_now(inode, 0);

	/* sync the superblock to buffers */
	sb = inode->i_sb;
	if (sb->s_dirt) {
		if (!(sb->s_flags & MS_RDONLY))
			hfsplus_sync_fs(sb, 1);
		else
			sb->s_dirt = 0;
	}

	/* .. finally sync the buffers to disk */
	err = sync_blockdev(sb->s_bdev);
	if (!ret)
		ret = err;
	return ret;
}

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->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)->dev = 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_DATA(inode) ?
					&file->data_fork : &file->rsrc_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_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);
		if (S_ISREG(inode->i_mode))
			HFSPLUS_I(inode)->dev = inode->i_nlink;
		if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
			HFSPLUS_I(inode)->dev = kdev_t_to_nr(inode->i_rdev);
		hfsplus_set_perms(inode, &file->permissions);
		if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
			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));
	}
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
	11	#include <linux/mm.h>
	12	#include <linux/fs.h>
	13	#include <linux/pagemap.h>
1da177e4	14	#include <linux/mpage.h>
e8edc6e0	15	#include <linux/sched.h>
1da177e4 LT	16
	17	#include "hfsplus_fs.h"
	18	#include "hfsplus_raw.h"
	19
	20	static int hfsplus_readpage(struct file file, struct page page)
	21	{
1da177e4 LT	22	return block_read_full_page(page, hfsplus_get_block);
	23	}
	24
	25	static int hfsplus_writepage(struct page page, struct writeback_control wbc)
	26	{
1da177e4 LT	27	return block_write_full_page(page, hfsplus_get_block, wbc);
	28	}
	29
7c0efc62 NP	30	static int hfsplus_write_begin(struct file file, struct address_space mapping,
	31	loff_t pos, unsigned len, unsigned flags,
	32	struct page pagep, void fsdata)
1da177e4	33	{
282dc178 CH	34	int ret;
282dc178 CH	35
7c0efc62	36	*pagep = NULL;
282dc178	37	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
7c0efc62	38	hfsplus_get_block,
6af502de	39	&HFSPLUS_I(mapping->host)->phys_size);
282dc178 CH	40	if (unlikely(ret)) {
	41	loff_t isize = mapping->host->i_size;
	42	if (pos + len > isize)
	43	vmtruncate(mapping->host, isize);
	44	}
	45
	46	return ret;
1da177e4 LT	47	}
	48
	49	static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
	50	{
	51	return generic_block_bmap(mapping, block, hfsplus_get_block);
	52	}
	53
27496a8c	54	static int hfsplus_releasepage(struct page *page, gfp_t mask)
1da177e4 LT	55	{
	56	struct inode *inode = page->mapping->host;
	57	struct super_block *sb = inode->i_sb;
	58	struct hfs_btree *tree;
	59	struct hfs_bnode *node;
	60	u32 nidx;
	61	int i, res = 1;
	62
	63	switch (inode->i_ino) {
	64	case HFSPLUS_EXT_CNID:
dd73a01a	65	tree = HFSPLUS_SB(sb)->ext_tree;
1da177e4 LT	66	break;
1da177e4 LT	67	case HFSPLUS_CAT_CNID:
dd73a01a	68	tree = HFSPLUS_SB(sb)->cat_tree;
1da177e4 LT	69	break;
1da177e4 LT	70	case HFSPLUS_ATTR_CNID:
dd73a01a	71	tree = HFSPLUS_SB(sb)->attr_tree;
1da177e4 LT	72	break;
	73	default:
	74	BUG();
	75	return 0;
	76	}
70632249 ES	77	if (!tree)
70632249 ES	78	return 0;
1da177e4 LT	79	if (tree->node_size >= PAGE_CACHE_SIZE) {
	80	nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
	81	spin_lock(&tree->hash_lock);
	82	node = hfs_bnode_findhash(tree, nidx);
	83	if (!node)
	84	;
	85	else if (atomic_read(&node->refcnt))
	86	res = 0;
	87	if (res && node) {
	88	hfs_bnode_unhash(node);
	89	hfs_bnode_free(node);
	90	}
	91	spin_unlock(&tree->hash_lock);
	92	} else {
	93	nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
	94	i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
	95	spin_lock(&tree->hash_lock);
	96	do {
	97	node = hfs_bnode_findhash(tree, nidx++);
	98	if (!node)
	99	continue;
	100	if (atomic_read(&node->refcnt)) {
	101	res = 0;
	102	break;
	103	}
	104	hfs_bnode_unhash(node);
	105	hfs_bnode_free(node);
	106	} while (--i && nidx < tree->node_count);
	107	spin_unlock(&tree->hash_lock);
	108	}
1da177e4 LT	109	return res ? try_to_free_buffers(page) : 0;
	110	}
	111
1da177e4 LT	112	static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
	113	const struct iovec *iov, loff_t offset, unsigned long nr_segs)
	114	{
	115	struct file *file = iocb->ki_filp;
f44ea031	116	struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
eafdc7d1	117	ssize_t ret;
1da177e4	118
eafdc7d1	119	ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
1d8fa7a2	120	offset, nr_segs, hfsplus_get_block, NULL);
eafdc7d1 CH	121
	122	/*
	123	* In case of error extending write may have instantiated a few
	124	* blocks outside i_size. Trim these off again.
	125	*/
	126	if (unlikely((rw & WRITE) && ret < 0)) {
	127	loff_t isize = i_size_read(inode);
	128	loff_t end = offset + iov_length(iov, nr_segs);
	129
	130	if (end > isize)
	131	vmtruncate(inode, isize);
	132	}
	133
	134	return ret;
1da177e4 LT	135	}
	136
	137	static int hfsplus_writepages(struct address_space *mapping,
	138	struct writeback_control *wbc)
	139	{
	140	return mpage_writepages(mapping, wbc, hfsplus_get_block);
	141	}
	142
f5e54d6e	143	const struct address_space_operations hfsplus_btree_aops = {
1da177e4 LT	144	.readpage = hfsplus_readpage,
	145	.writepage = hfsplus_writepage,
	146	.sync_page = block_sync_page,
7c0efc62 NP	147	.write_begin = hfsplus_write_begin,
7c0efc62 NP	148	.write_end = generic_write_end,
1da177e4 LT	149	.bmap = hfsplus_bmap,
	150	.releasepage = hfsplus_releasepage,
	151	};
	152
f5e54d6e	153	const struct address_space_operations hfsplus_aops = {
1da177e4 LT	154	.readpage = hfsplus_readpage,
	155	.writepage = hfsplus_writepage,
	156	.sync_page = block_sync_page,
7c0efc62 NP	157	.write_begin = hfsplus_write_begin,
7c0efc62 NP	158	.write_end = generic_write_end,
1da177e4 LT	159	.bmap = hfsplus_bmap,
	160	.direct_IO = hfsplus_direct_IO,
	161	.writepages = hfsplus_writepages,
	162	};
	163
e16404ed	164	const struct dentry_operations hfsplus_dentry_operations = {
d45bce8f DG	165	.d_hash = hfsplus_hash_dentry,
	166	.d_compare = hfsplus_compare_dentry,
	167	};
	168
1da177e4 LT	169	static struct dentry hfsplus_file_lookup(struct inode dir, struct dentry *dentry,
	170	struct nameidata *nd)
	171	{
	172	struct hfs_find_data fd;
	173	struct super_block *sb = dir->i_sb;
	174	struct inode *inode = NULL;
6af502de	175	struct hfsplus_inode_info *hip;
1da177e4 LT	176	int err;
	177
	178	if (HFSPLUS_IS_RSRC(dir) \|\| strcmp(dentry->d_name.name, "rsrc"))
	179	goto out;
	180
6af502de	181	inode = HFSPLUS_I(dir)->rsrc_inode;
1da177e4 LT	182	if (inode)
	183	goto out;
	184
	185	inode = new_inode(sb);
	186	if (!inode)
	187	return ERR_PTR(-ENOMEM);
	188
6af502de	189	hip = HFSPLUS_I(inode);
1da177e4	190	inode->i_ino = dir->i_ino;
6af502de CH	191	INIT_LIST_HEAD(&hip->open_dir_list);
	192	mutex_init(&hip->extents_lock);
	193	hip->flags = HFSPLUS_FLG_RSRC;
1da177e4	194
dd73a01a	195	hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
1da177e4 LT	196	err = hfsplus_find_cat(sb, dir->i_ino, &fd);
	197	if (!err)
	198	err = hfsplus_cat_read_inode(inode, &fd);
	199	hfs_find_exit(&fd);
	200	if (err) {
	201	iput(inode);
	202	return ERR_PTR(err);
	203	}
6af502de CH	204	hip->rsrc_inode = dir;
6af502de CH	205	HFSPLUS_I(dir)->rsrc_inode = inode;
1da177e4	206	igrab(dir);
58a818f5 CH	207
	208	/*
	209	* __mark_inode_dirty expects inodes to be hashed. Since we don't
	210	* want resource fork inodes in the regular inode space, we make them
	211	* appear hashed, but do not put on any lists. hlist_del()
	212	* will work fine and require no locking.
	213	*/
	214	inode->i_hash.pprev = &inode->i_hash.next;
	215
1da177e4	216	mark_inode_dirty(inode);
1da177e4 LT	217	out:
	218	d_add(dentry, inode);
	219	return NULL;
	220	}
	221
	222	static void hfsplus_get_perms(struct inode inode, struct hfsplus_perm perms, int dir)
	223	{
dd73a01a	224	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
1da177e4 LT	225	u16 mode;
	226
	227	mode = be16_to_cpu(perms->mode);
	228
	229	inode->i_uid = be32_to_cpu(perms->owner);
	230	if (!inode->i_uid && !mode)
dd73a01a	231	inode->i_uid = sbi->uid;
1da177e4 LT	232
	233	inode->i_gid = be32_to_cpu(perms->group);
	234	if (!inode->i_gid && !mode)
dd73a01a	235	inode->i_gid = sbi->gid;
1da177e4 LT	236
1da177e4 LT	237	if (dir) {
dd73a01a	238	mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
1da177e4 LT	239	mode \|= S_IFDIR;
1da177e4 LT	240	} else if (!mode)
dd73a01a	241	mode = S_IFREG \| ((S_IRUGO\|S_IWUGO) & ~(sbi->umask));
1da177e4 LT	242	inode->i_mode = mode;
1da177e4 LT	243
6af502de CH	244	HFSPLUS_I(inode)->rootflags = perms->rootflags;
6af502de CH	245	HFSPLUS_I(inode)->userflags = perms->userflags;
1da177e4 LT	246	if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
	247	inode->i_flags \|= S_IMMUTABLE;
	248	else
	249	inode->i_flags &= ~S_IMMUTABLE;
	250	if (perms->rootflags & HFSPLUS_FLG_APPEND)
	251	inode->i_flags \|= S_APPEND;
	252	else
	253	inode->i_flags &= ~S_APPEND;
	254	}
	255
	256	static void hfsplus_set_perms(struct inode inode, struct hfsplus_perm perms)
	257	{
	258	if (inode->i_flags & S_IMMUTABLE)
	259	perms->rootflags \|= HFSPLUS_FLG_IMMUTABLE;
	260	else
	261	perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
	262	if (inode->i_flags & S_APPEND)
	263	perms->rootflags \|= HFSPLUS_FLG_APPEND;
	264	else
	265	perms->rootflags &= ~HFSPLUS_FLG_APPEND;
6af502de	266	perms->userflags = HFSPLUS_I(inode)->userflags;
1da177e4 LT	267	perms->mode = cpu_to_be16(inode->i_mode);
	268	perms->owner = cpu_to_be32(inode->i_uid);
	269	perms->group = cpu_to_be32(inode->i_gid);
6af502de	270	perms->dev = cpu_to_be32(HFSPLUS_I(inode)->dev);
1da177e4 LT	271	}
1da177e4 LT	272
1da177e4 LT	273	static int hfsplus_file_open(struct inode inode, struct file file)
	274	{
	275	if (HFSPLUS_IS_RSRC(inode))
6af502de	276	inode = HFSPLUS_I(inode)->rsrc_inode;
6e715294 AC	277	if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
6e715294 AC	278	return -EOVERFLOW;
6af502de	279	atomic_inc(&HFSPLUS_I(inode)->opencnt);
1da177e4 LT	280	return 0;
	281	}
	282
	283	static int hfsplus_file_release(struct inode inode, struct file file)
	284	{
	285	struct super_block *sb = inode->i_sb;
	286
	287	if (HFSPLUS_IS_RSRC(inode))
6af502de CH	288	inode = HFSPLUS_I(inode)->rsrc_inode;
6af502de CH	289	if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
1b1dcc1b	290	mutex_lock(&inode->i_mutex);
1da177e4 LT	291	hfsplus_file_truncate(inode);
1da177e4 LT	292	if (inode->i_flags & S_DEAD) {
dd73a01a CH	293	hfsplus_delete_cat(inode->i_ino,
dd73a01a CH	294	HFSPLUS_SB(sb)->hidden_dir, NULL);
1da177e4 LT	295	hfsplus_delete_inode(inode);
1da177e4 LT	296	}
1b1dcc1b	297	mutex_unlock(&inode->i_mutex);
1da177e4 LT	298	}
	299	return 0;
	300	}
	301
d39aae9e CH	302	static int hfsplus_setattr(struct dentry dentry, struct iattr attr)
	303	{
	304	struct inode *inode = dentry->d_inode;
	305	int error;
	306
	307	error = inode_change_ok(inode, attr);
	308	if (error)
	309	return error;
1025774c CH	310
	311	if ((attr->ia_valid & ATTR_SIZE) &&
	312	attr->ia_size != i_size_read(inode)) {
	313	error = vmtruncate(inode, attr->ia_size);
	314	if (error)
	315	return error;
	316	}
	317
	318	setattr_copy(inode, attr);
	319	mark_inode_dirty(inode);
	320	return 0;
d39aae9e CH	321	}
d39aae9e CH	322
b5fc510c AV	323	static int hfsplus_file_fsync(struct file *filp, int datasync)
	324	{
	325	struct inode *inode = filp->f_mapping->host;
	326	struct super_block * sb;
	327	int ret, err;
	328
	329	/* sync the inode to buffers */
	330	ret = write_inode_now(inode, 0);
	331
	332	/* sync the superblock to buffers */
	333	sb = inode->i_sb;
	334	if (sb->s_dirt) {
	335	if (!(sb->s_flags & MS_RDONLY))
	336	hfsplus_sync_fs(sb, 1);
	337	else
	338	sb->s_dirt = 0;
	339	}
	340
	341	/* .. finally sync the buffers to disk */
	342	err = sync_blockdev(sb->s_bdev);
	343	if (!ret)
	344	ret = err;
	345	return ret;
	346	}
	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 = {
1da177e4	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);
	391	hip->flags = 0;
	392	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
	393	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	394	hip->alloc_blocks = 0;
	395	hip->first_blocks = 0;
	396	hip->cached_start = 0;
	397	hip->cached_blocks = 0;
	398	hip->phys_size = 0;
	399	hip->fs_blocks = 0;
	400	hip->rsrc_inode = NULL;
1da177e4 LT	401	if (S_ISDIR(inode->i_mode)) {
1da177e4 LT	402	inode->i_size = 2;
dd73a01a	403	sbi->folder_count++;
1da177e4 LT	404	inode->i_op = &hfsplus_dir_inode_operations;
	405	inode->i_fop = &hfsplus_dir_operations;
	406	} else if (S_ISREG(inode->i_mode)) {
dd73a01a	407	sbi->file_count++;
1da177e4 LT	408	inode->i_op = &hfsplus_file_inode_operations;
	409	inode->i_fop = &hfsplus_file_operations;
	410	inode->i_mapping->a_ops = &hfsplus_aops;
6af502de	411	hip->clump_blocks = sbi->data_clump_blocks;
1da177e4	412	} else if (S_ISLNK(inode->i_mode)) {
dd73a01a	413	sbi->file_count++;
1da177e4 LT	414	inode->i_op = &page_symlink_inode_operations;
1da177e4 LT	415	inode->i_mapping->a_ops = &hfsplus_aops;
6af502de	416	hip->clump_blocks = 1;
1da177e4	417	} else
dd73a01a	418	sbi->file_count++;
1da177e4 LT	419	insert_inode_hash(inode);
	420	mark_inode_dirty(inode);
	421	sb->s_dirt = 1;
	422
	423	return inode;
	424	}
	425
	426	void hfsplus_delete_inode(struct inode *inode)
	427	{
	428	struct super_block *sb = inode->i_sb;
	429
	430	if (S_ISDIR(inode->i_mode)) {
dd73a01a	431	HFSPLUS_SB(sb)->folder_count--;
1da177e4 LT	432	sb->s_dirt = 1;
	433	return;
	434	}
dd73a01a	435	HFSPLUS_SB(sb)->file_count--;
1da177e4 LT	436	if (S_ISREG(inode->i_mode)) {
	437	if (!inode->i_nlink) {
	438	inode->i_size = 0;
	439	hfsplus_file_truncate(inode);
	440	}
	441	} else if (S_ISLNK(inode->i_mode)) {
	442	inode->i_size = 0;
	443	hfsplus_file_truncate(inode);
	444	}
	445	sb->s_dirt = 1;
	446	}
	447
	448	void hfsplus_inode_read_fork(struct inode inode, struct hfsplus_fork_raw fork)
	449	{
	450	struct super_block *sb = inode->i_sb;
dd73a01a	451	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
6af502de	452	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
1da177e4 LT	453	u32 count;
	454	int i;
	455
6af502de	456	memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
1da177e4 LT	457	for (count = 0, i = 0; i < 8; i++)
1da177e4 LT	458	count += be32_to_cpu(fork->extents[i].block_count);
6af502de CH	459	hip->first_blocks = count;
	460	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	461	hip->cached_start = 0;
	462	hip->cached_blocks = 0;
	463
	464	hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
	465	hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
	466	hip->fs_blocks =
	467	(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
	468	inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
	469	hip->clump_blocks =
dd73a01a	470	be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
6af502de CH	471	if (!hip->clump_blocks) {
6af502de CH	472	hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
dd73a01a CH	473	sbi->rsrc_clump_blocks :
	474	sbi->data_clump_blocks;
	475	}
1da177e4 LT	476	}
	477
	478	void hfsplus_inode_write_fork(struct inode inode, struct hfsplus_fork_raw fork)
	479	{
6af502de	480	memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
1da177e4 LT	481	sizeof(hfsplus_extent_rec));
1da177e4 LT	482	fork->total_size = cpu_to_be64(inode->i_size);
6af502de	483	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
1da177e4 LT	484	}
	485
	486	int hfsplus_cat_read_inode(struct inode inode, struct hfs_find_data fd)
	487	{
	488	hfsplus_cat_entry entry;
	489	int res = 0;
	490	u16 type;
	491
	492	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
	493
6af502de	494	HFSPLUS_I(inode)->dev = 0;
1da177e4 LT	495	if (type == HFSPLUS_FOLDER) {
	496	struct hfsplus_cat_folder *folder = &entry.folder;
	497
	498	if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
	499	/* panic? */;
	500	hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
	501	sizeof(struct hfsplus_cat_folder));
	502	hfsplus_get_perms(inode, &folder->permissions, 1);
	503	inode->i_nlink = 1;
	504	inode->i_size = 2 + be32_to_cpu(folder->valence);
	505	inode->i_atime = hfsp_mt2ut(folder->access_date);
	506	inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
9a4cad95	507	inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
6af502de CH	508	HFSPLUS_I(inode)->create_date = folder->create_date;
6af502de CH	509	HFSPLUS_I(inode)->fs_blocks = 0;
1da177e4 LT	510	inode->i_op = &hfsplus_dir_inode_operations;
	511	inode->i_fop = &hfsplus_dir_operations;
	512	} else if (type == HFSPLUS_FILE) {
	513	struct hfsplus_cat_file *file = &entry.file;
	514
	515	if (fd->entrylength < sizeof(struct hfsplus_cat_file))
	516	/* panic? */;
	517	hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
	518	sizeof(struct hfsplus_cat_file));
	519
	520	hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
	521	&file->data_fork : &file->rsrc_fork);
	522	hfsplus_get_perms(inode, &file->permissions, 0);
	523	inode->i_nlink = 1;
	524	if (S_ISREG(inode->i_mode)) {
	525	if (file->permissions.dev)
	526	inode->i_nlink = be32_to_cpu(file->permissions.dev);
	527	inode->i_op = &hfsplus_file_inode_operations;
	528	inode->i_fop = &hfsplus_file_operations;
	529	inode->i_mapping->a_ops = &hfsplus_aops;
	530	} else if (S_ISLNK(inode->i_mode)) {
	531	inode->i_op = &page_symlink_inode_operations;
	532	inode->i_mapping->a_ops = &hfsplus_aops;
	533	} else {
	534	init_special_inode(inode, inode->i_mode,
	535	be32_to_cpu(file->permissions.dev));
	536	}
	537	inode->i_atime = hfsp_mt2ut(file->access_date);
	538	inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
9a4cad95	539	inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
6af502de	540	HFSPLUS_I(inode)->create_date = file->create_date;
1da177e4	541	} else {
634725a9	542	printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
1da177e4 LT	543	res = -EIO;
	544	}
	545	return res;
	546	}
	547
	548	int hfsplus_cat_write_inode(struct inode *inode)
	549	{
	550	struct inode *main_inode = inode;
	551	struct hfs_find_data fd;
	552	hfsplus_cat_entry entry;
	553
	554	if (HFSPLUS_IS_RSRC(inode))
6af502de	555	main_inode = HFSPLUS_I(inode)->rsrc_inode;
1da177e4 LT	556
	557	if (!main_inode->i_nlink)
	558	return 0;
	559
dd73a01a	560	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
1da177e4 LT	561	/* panic? */
	562	return -EIO;
	563
	564	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
	565	/* panic? */
	566	goto out;
	567
	568	if (S_ISDIR(main_inode->i_mode)) {
	569	struct hfsplus_cat_folder *folder = &entry.folder;
	570
	571	if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
	572	/* panic? */;
	573	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	574	sizeof(struct hfsplus_cat_folder));
	575	/* simple node checks? */
	576	hfsplus_set_perms(inode, &folder->permissions);
	577	folder->access_date = hfsp_ut2mt(inode->i_atime);
	578	folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
	579	folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
	580	folder->valence = cpu_to_be32(inode->i_size - 2);
	581	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	582	sizeof(struct hfsplus_cat_folder));
	583	} else if (HFSPLUS_IS_RSRC(inode)) {
	584	struct hfsplus_cat_file *file = &entry.file;
	585	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	586	sizeof(struct hfsplus_cat_file));
	587	hfsplus_inode_write_fork(inode, &file->rsrc_fork);
	588	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	589	sizeof(struct hfsplus_cat_file));
	590	} else {
	591	struct hfsplus_cat_file *file = &entry.file;
	592
	593	if (fd.entrylength < sizeof(struct hfsplus_cat_file))
	594	/* panic? */;
	595	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	596	sizeof(struct hfsplus_cat_file));
	597	hfsplus_inode_write_fork(inode, &file->data_fork);
	598	if (S_ISREG(inode->i_mode))
6af502de	599	HFSPLUS_I(inode)->dev = inode->i_nlink;
1da177e4	600	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
6af502de	601	HFSPLUS_I(inode)->dev = kdev_t_to_nr(inode->i_rdev);
1da177e4 LT	602	hfsplus_set_perms(inode, &file->permissions);
	603	if ((file->permissions.rootflags \| file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
	604	file->flags \|= cpu_to_be16(HFSPLUS_FILE_LOCKED);
	605	else
	606	file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
	607	file->access_date = hfsp_ut2mt(inode->i_atime);
	608	file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
	609	file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
	610	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	611	sizeof(struct hfsplus_cat_file));
	612	}
	613	out:
	614	hfs_find_exit(&fd);
	615	return 0;
	616	}