/*
 *  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_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
{
	return cont_prepare_write(page, from, to, hfsplus_get_block,
		&HFSPLUS_I(page->mapping->host).phys_size);
}

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->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;
}

int hfsplus_commit_write_fn(hfsplus_handle_t *hfsplus_handle, struct buffer_head *bh)
{
	if (!buffer_mapped(bh) || buffer_hfsplus_jbd_freed(bh))
		return 0;
	set_buffer_uptodate(bh);

	return hfsplus_journal_dirty_metadata(__FUNCTION__, bh, hfsplus_handle);
}

static int hfsplus_jbd_set_page_dirty(struct page *page)
{
	SetPageChecked(page);
	return __set_page_dirty_nobuffers(page);
}

int hfsplus_walk_page_buffers(hfsplus_handle_t *hfsplus_handle,
				struct buffer_head *head,
				unsigned from,
				unsigned to,
				int *partial,
				int (*fn)(hfsplus_handle_t *hfsplus_handle,
						struct buffer_head *bh))
{
	struct buffer_head *bh;
	unsigned block_start, block_end;
	unsigned blocksize = head->b_size;
	int err, ret = 0;
	struct buffer_head *next;

	for (	bh = head, block_start = 0;
		ret == 0 && (bh != head || !block_start);
	    	block_start = block_end, bh = next)
	{
		next = bh->b_this_page;
		block_end = block_start + blocksize;
		if (block_end <= from || block_start >= to) {
			if (partial && !buffer_uptodate(bh))
				*partial = 1;
			continue;
		}
		err = (*fn)(hfsplus_handle, bh);
		if (!ret)
			ret = err;
	}
	return ret;
}

int hfsplus_do_journal_get_write_access(hfsplus_handle_t *hfsplus_handle, struct buffer_head *bh)
{
	if (!buffer_mapped(bh) || buffer_hfsplus_jbd_freed(bh))
		return 0;
	return hfsplus_journal_get_write_access(__FUNCTION__, hfsplus_handle, bh);
}

static int hfsplus_journalled_writepage(struct page *page, struct writeback_control *wbc)
{
	struct inode *inode = page->mapping->host;
	struct super_block *sb;
	hfsplus_handle_t hfsplus_handle;
	hfsplus_jbd_t *journal;
	int ret = 0;
	int err;

	sb = inode->i_sb;

	if (hfsplus_jbd_current_handle()) {
		dprint(DBG_JCOMMIT, "HFS+-fs: It is already in a handle\n");
		goto no_write;
	}

	journal = HFSPLUS_SB(sb).jnl.s_journal;
	if (is_hfsplus_jbd_aborted(journal)) {
		printk("HFS+-fs: Detected aborted journal\n");
		goto no_write;
	}

	if ((ret = hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle))) 
		goto no_write;

	/* Taken from ext3 */
	if (!page_has_buffers(page) || PageChecked(page)) {
		/*
		 * It's mmapped pagecache.  Add buffers and journal it.  There
		 * doesn't seem much point in redirtying the page here.
		 */
		ClearPageChecked(page);
		ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE, hfsplus_get_block);
		if (ret != 0) {
			hfsplus_journal_stop(&hfsplus_handle);
			goto out_unlock;
		}
		ret = hfsplus_walk_page_buffers(&hfsplus_handle, page_buffers(page), 0,
			PAGE_CACHE_SIZE, NULL, hfsplus_do_journal_get_write_access);

		err = hfsplus_walk_page_buffers(&hfsplus_handle, page_buffers(page), 0,
				PAGE_CACHE_SIZE, NULL, hfsplus_commit_write_fn);
		if (ret == 0)
			ret = err;
		unlock_page(page);
	} else {
		/*
		 * It may be a page full of checkpoint-mode buffers.  We don't
		 * really know unless we go poke around in the buffer_heads.
		 * But block_write_full_page will do the right thing.
		 */
		ret = block_write_full_page(page, hfsplus_get_block, wbc);
	}
	err = hfsplus_journal_stop(&hfsplus_handle);
	if (!ret)
		ret = err;

out:
	return ret;

no_write:
	redirty_page_for_writepage(wbc, page);
out_unlock:
	unlock_page(page);
	goto out;
}

static int hfsplus_journalled_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
{
	struct inode *inode = page->mapping->host;
	hfsplus_handle_t hfsplus_handle;
	int ret;

	if ((ret = hfsplus_journal_start(__FUNCTION__, inode->i_sb, &hfsplus_handle)))
		goto out;

	ret = block_prepare_write(page, from, to, hfsplus_get_block);
	if (ret)
		hfsplus_journal_stop(&hfsplus_handle);

out:
	return ret;
}

static int hfsplus_journalled_commit_write(struct file *file, struct page *page, unsigned from, unsigned to)
{
	hfsplus_handle_t *hfsplus_handle; 
	struct inode *inode = page->mapping->host;
	int ret = 0, ret2;
	int partial = 0;
	loff_t pos;

	hfsplus_handle = hfsplus_jbd_current_handle();
	/*
	 * Here we duplicate the generic_commit_write() functionality
	 */
	pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;

	ret = hfsplus_walk_page_buffers(hfsplus_handle, page_buffers(page), from, to, &partial, hfsplus_commit_write_fn);
	if (!partial)
		SetPageUptodate(page);
	if (pos > inode->i_size) {
		i_size_write(inode, pos);
		ret2 = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, inode);
		if (!ret)
			ret = ret2;
	}

	ret2 = hfsplus_journal_stop(hfsplus_handle);
	if (!ret)
		ret = ret2;
	return ret;
}

static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
			      struct buffer_head *bh_result, int create)
{
	int ret;

	ret = hfsplus_get_block(inode, iblock, bh_result, create);
	if (!ret)
		bh_result->b_size = (1 << inode->i_blkbits);
	return ret;
}

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;

	return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
				  offset, nr_segs, hfsplus_get_block, NULL);
}

static int hfsplus_writepages(struct address_space *mapping,
			      struct writeback_control *wbc)
{
	struct inode * const inode = mapping->host;
	int ret;
	u32 block_num = be32_to_cpu(HFSPLUS_I(inode).first_extents[0].start_block);

	if (block_num == 1)
		return mpage_writepages(mapping, wbc, NULL);
	else
		return mpage_writepages(mapping, wbc, hfsplus_get_block);

	return ret;
}

#if 0
static int hfsplus_journalled_writepages(struct address_space *mapping,
			      struct writeback_control *wbc)
{
	struct inode * const inode = mapping->host;
	u32 block_num = be32_to_cpu(HFSPLUS_I(inode).first_extents[0].start_block);
	int ret;
	hfsplus_handle_t hfsplus_handle;

	if (hfsplus_journal_start(__FUNCTION__, inode->i_sb, &hfsplus_handle))
		return 1; /* TODO: Need to check return value */

	if (block_num == 1)
		ret = mpage_writepages(mapping, wbc, NULL);
	else
		ret = mpage_writepages(mapping, wbc, hfsplus_get_block);

	hfsplus_journal_stop(&hfsplus_handle);
	return ret;
}
#endif

struct address_space_operations hfsplus_journalled_btree_aops = {
	.readpage	= hfsplus_readpage,
	.writepage	= hfsplus_journalled_writepage,
	.sync_page	= block_sync_page,
	.prepare_write	= hfsplus_journalled_prepare_write,
	.commit_write	= hfsplus_journalled_commit_write,
	.set_page_dirty = hfsplus_jbd_set_page_dirty,
	.bmap		= hfsplus_bmap,
	.releasepage	= hfsplus_releasepage,
};

struct address_space_operations hfsplus_journalled_aops = {
	.readpage	= hfsplus_readpage,
	.writepage	= hfsplus_journalled_writepage,
	.sync_page	= block_sync_page,
	.prepare_write	= hfsplus_journalled_prepare_write,
	.commit_write	= hfsplus_journalled_commit_write,
	.set_page_dirty = hfsplus_jbd_set_page_dirty,
	.bmap		= hfsplus_bmap,
	.direct_IO	= hfsplus_direct_IO,
	.writepages	= hfsplus_writepages,
};

const struct address_space_operations hfsplus_btree_aops = {
	.readpage	= hfsplus_readpage,
	.writepage	= hfsplus_writepage,
	.sync_page	= block_sync_page,
	.prepare_write	= hfsplus_prepare_write,
	.commit_write	= generic_commit_write,
	.bmap		= hfsplus_bmap,
	.releasepage	= hfsplus_releasepage,
};

const struct address_space_operations hfsplus_aops = {
	.readpage	= hfsplus_readpage,
	.writepage	= hfsplus_writepage,
	.sync_page	= block_sync_page,
	.prepare_write	= hfsplus_prepare_write,
	.commit_write	= generic_commit_write,
	.bmap		= hfsplus_bmap,
	.direct_IO	= hfsplus_direct_IO,
	.writepages	= hfsplus_writepages,
};

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;
	hfsplus_handle_t hfsplus_handle;
	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;
	
	if (hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle))
		return NULL;

	inode = new_inode(sb);
	if (!inode) {
		hfsplus_journal_stop(&hfsplus_handle);
		return ERR_PTR(-ENOMEM);
	}

	inode->i_ino = dir->i_ino;
	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
	HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;

	hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
	err = hfsplus_find_cat(&hfsplus_handle, sb, dir->i_ino, &fd);
	if (!err)
		err = hfsplus_cat_read_inode(inode, &fd);
	hfs_find_exit(&hfsplus_handle, &fd);
	if (err) {
		iput(inode);
		hfsplus_journal_stop(&hfsplus_handle);
		return ERR_PTR(err);
	}
	HFSPLUS_I(inode).rsrc_inode = dir;
	HFSPLUS_I(dir).rsrc_inode = inode;
	igrab(dir);
	hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes);
	hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
	hfsplus_journal_stop(&hfsplus_handle);
out:
	d_add(dentry, inode);
	return NULL;
}

static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
{
	struct super_block *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 = HFSPLUS_SB(sb).uid;

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

	if (dir) {
		mode = mode ? (mode & S_IALLUGO) :
			(S_IRWXUGO & ~(HFSPLUS_SB(sb).umask));
		mode |= S_IFDIR;
	} else if (!mode)
		mode = S_IFREG | ((S_IRUGO|S_IWUGO) &
			~(HFSPLUS_SB(sb).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_permission(struct inode *inode, int mask, struct nameidata *nd)
{
	/* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
	 * open_exec has the same test, so it's still not executable, if a x bit
	 * is set fall back to standard permission check.
	 */
	if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111))
		return 0;
	return generic_permission(inode, mask, NULL);
}


static int hfsplus_file_open(struct inode *inode, struct file *file)
{
	if (HFSPLUS_IS_RSRC(inode))
		inode = HFSPLUS_I(inode).rsrc_inode;
	if (atomic_read(&file->f_count) != 1)
		return 0;
	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;
	hfsplus_handle_t hfsplus_handle;

	if (HFSPLUS_IS_RSRC(inode))
		inode = HFSPLUS_I(inode).rsrc_inode;
	if (atomic_read(&file->f_count) != 0)
		return 0;
	if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
		int ret;
		mutex_lock(&inode->i_mutex);
		hfsplus_file_truncate(inode);
		if (inode->i_flags & S_DEAD) {
			if ((ret = hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle))) {
				mutex_unlock(&inode->i_mutex);
				return ret;
			}
			hfsplus_delete_cat(&hfsplus_handle, inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
			hfsplus_delete_inode(&hfsplus_handle, inode);
			hfsplus_journal_stop(&hfsplus_handle);
		}
		mutex_unlock(&inode->i_mutex);
	}
	return 0;
}

extern const struct inode_operations hfsplus_dir_inode_operations;
extern struct file_operations hfsplus_dir_operations;

static const struct inode_operations hfsplus_file_inode_operations = {
	.lookup		= hfsplus_file_lookup,
	.truncate	= hfsplus_file_truncate,
	.permission	= hfsplus_permission,
	.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,
	.sendfile	= generic_file_sendfile,
	.fsync		= file_fsync,
	.open		= hfsplus_file_open,
	.release	= hfsplus_file_release,
	.ioctl          = hfsplus_ioctl,
};

struct inode *hfsplus_new_inode(hfsplus_handle_t *hfsplus_handle, struct super_block *sb, int mode)
{
	struct inode *inode = new_inode(sb);
	if (!inode)
		return NULL;

	//{
	//void hfsplus_inode_check(struct super_block *sb);
	//atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
	//hfsplus_inode_check(sb);
	//}
	inode->i_ino = HFSPLUS_SB(sb).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;
	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
	atomic_set(&HFSPLUS_I(inode).opencnt, 0);
	HFSPLUS_I(inode).flags = 0;
	memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
	memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
	HFSPLUS_I(inode).alloc_blocks = 0;
	HFSPLUS_I(inode).first_blocks = 0;
	HFSPLUS_I(inode).cached_start = 0;
	HFSPLUS_I(inode).cached_blocks = 0;
	HFSPLUS_I(inode).phys_size = 0;
	HFSPLUS_I(inode).fs_blocks = 0;
	HFSPLUS_I(inode).rsrc_inode = NULL;
	if (S_ISDIR(inode->i_mode)) {
		inode->i_size = 2;
		HFSPLUS_SB(sb).folder_count++;
		inode->i_op = &hfsplus_dir_inode_operations;
		inode->i_fop = &hfsplus_dir_operations;
	} else if (S_ISREG(inode->i_mode)) {
		HFSPLUS_SB(sb).file_count++;
		inode->i_op = &hfsplus_file_inode_operations;
		inode->i_fop = &hfsplus_file_operations;
		inode->i_mapping->a_ops = &hfsplus_aops;
		HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks;
	} else if (S_ISLNK(inode->i_mode)) {
		HFSPLUS_SB(sb).file_count++;
		inode->i_op = &page_symlink_inode_operations;
		inode->i_mapping->a_ops = &hfsplus_aops;
		HFSPLUS_I(inode).clump_blocks = 1;
	} else
		HFSPLUS_SB(sb).file_count++;
	insert_inode_hash(inode);
	if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, inode)) {
		hfsplus_delete_inode(hfsplus_handle, inode);	
		return NULL;
	}
	sb->s_dirt = 1;

	return inode;
}

void hfsplus_delete_inode(hfsplus_handle_t *hfsplus_handle, 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;
	u32 count;
	int i;

	memcpy(&HFSPLUS_I(inode).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);
	HFSPLUS_I(inode).first_blocks = count;
	memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
	HFSPLUS_I(inode).cached_start = 0;
	HFSPLUS_I(inode).cached_blocks = 0;

	HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks);
	inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size);
	HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
	inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits);
    /* Foxconn added start pling 05/31/2010 */
    /* Set the i_blocks field properly */
    inode->i_blocks = inode->i_size/512;
    if (inode->i_size % 512)
        inode->i_blocks++;
    /* Foxconn added end pling 05/31/2010 */
	HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift;
	if (!HFSPLUS_I(inode).clump_blocks)
		HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks :
				HFSPLUS_SB(sb).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(hfsplus_handle_t *hfsplus_handle, 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 (hfsplus_handle->journaled != HFSPLUS_JOURNAL_PRESENT) {
		if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd))
			/* panic? */
			return -EIO;
	} else {
		if (hfsplus_journalled_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd))
			/* panic? */
			return -EIO;
	}

	if (hfsplus_find_cat(hfsplus_handle, 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(hfsplus_handle, 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(hfsplus_handle, 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(hfsplus_handle, fd.bnode, &entry, fd.entryoffset,
					 sizeof(struct hfsplus_cat_file));
	}
out:
	if (hfsplus_handle->journaled != HFSPLUS_JOURNAL_PRESENT) {
		hfs_find_exit(hfsplus_handle, &fd);
	} else {
		hfsplus_journalled_find_exit(hfsplus_handle, &fd);
	}
	return 0;
}