btrfs: Make drop_outstanding_extent take btrfs_inode

 * reserved extents that need to be freed.  This must be called with

 * BTRFS_I(inode)->lock held.

 */

static unsigned drop_outstanding_extent(struct inode *inode, u64 num_bytes)

static unsigned drop_outstanding_extent(struct btrfs_inode *inode,

		u64 num_bytes)

{

	unsigned drop_inode_space = 0;

	unsigned dropped_extents = 0;

	num_extents = count_max_extents(num_bytes);

	ASSERT(num_extents);

	ASSERT(BTRFS_I(inode)->outstanding_extents >= num_extents);

	BTRFS_I(inode)->outstanding_extents -= num_extents;

	ASSERT(inode->outstanding_extents >= num_extents);

	inode->outstanding_extents -= num_extents;

	if (BTRFS_I(inode)->outstanding_extents == 0 &&

	if (inode->outstanding_extents == 0 &&

	    test_and_clear_bit(BTRFS_INODE_DELALLOC_META_RESERVED,

			       &BTRFS_I(inode)->runtime_flags))

			       &inode->runtime_flags))

		drop_inode_space = 1;

	/*

	 * If we have more or the same amount of outstanding extents than we have

	 * reserved then we need to leave the reserved extents count alone.

	 */

	if (BTRFS_I(inode)->outstanding_extents >=

	    BTRFS_I(inode)->reserved_extents)

	if (inode->outstanding_extents >= inode->reserved_extents)

		return drop_inode_space;

	dropped_extents = BTRFS_I(inode)->reserved_extents -

		BTRFS_I(inode)->outstanding_extents;

	BTRFS_I(inode)->reserved_extents -= dropped_extents;

	dropped_extents = inode->reserved_extents - inode->outstanding_extents;

	inode->reserved_extents -= dropped_extents;

	return dropped_extents + drop_inode_space;

}

out_fail:

	spin_lock(&BTRFS_I(inode)->lock);

	dropped = drop_outstanding_extent(inode, num_bytes);

	dropped = drop_outstanding_extent(BTRFS_I(inode), num_bytes);

	/*

	 * If the inodes csum_bytes is the same as the original

	 * csum_bytes then we know we haven't raced with any free()ers

	num_bytes = ALIGN(num_bytes, fs_info->sectorsize);

	spin_lock(&BTRFS_I(inode)->lock);

	dropped = drop_outstanding_extent(inode, num_bytes);

	dropped = drop_outstanding_extent(BTRFS_I(inode), num_bytes);

	if (num_bytes)

		to_free = calc_csum_metadata_size(inode, num_bytes, 0);