[PATCH 07/21] xfs: add a xfs_bmap_free_rtblocks helper

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Christoph Hellwig <hch@xxxxxx>

Split the RT extent freeing logic from xfs_bmap_del_extent_real because
it will become more complicated when adding RT group.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_bmap.c |   33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)


diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 2cd9dc07dd1a06..ca9b0ea115c893 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -5168,6 +5168,27 @@ xfs_bmap_del_extent_cow(
 	ip->i_delayed_blks -= del->br_blockcount;
 }
 
+static int
+xfs_bmap_free_rtblocks(
+	struct xfs_trans	*tp,
+	struct xfs_bmbt_irec	*del)
+{
+	int			error;
+
+	/*
+	 * Ensure the bitmap and summary inodes are locked and joined to the
+	 * transaction before modifying them.
+	 */
+	if (!(tp->t_flags & XFS_TRANS_RTBITMAP_LOCKED)) {
+		tp->t_flags |= XFS_TRANS_RTBITMAP_LOCKED;
+		xfs_rtbitmap_lock(tp->t_mountp);
+		xfs_rtbitmap_trans_join(tp);
+	}
+
+	error = xfs_rtfree_blocks(tp, del->br_startblock, del->br_blockcount);
+	return error;
+}
+
 /*
  * Called by xfs_bmapi to update file extent records and the btree
  * after removing space.
@@ -5383,17 +5404,7 @@ xfs_bmap_del_extent_real(
 		if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) {
 			xfs_refcount_decrease_extent(tp, del);
 		} else if (xfs_ifork_is_realtime(ip, whichfork)) {
-			/*
-			 * Ensure the bitmap and summary inodes are locked
-			 * and joined to the transaction before modifying them.
-			 */
-			if (!(tp->t_flags & XFS_TRANS_RTBITMAP_LOCKED)) {
-				tp->t_flags |= XFS_TRANS_RTBITMAP_LOCKED;
-				xfs_rtbitmap_lock(mp);
-				xfs_rtbitmap_trans_join(tp);
-			}
-			error = xfs_rtfree_blocks(tp, del->br_startblock,
-					del->br_blockcount);
+			error = xfs_bmap_free_rtblocks(tp, del);
 		} else {
 			unsigned int	efi_flags = 0;