xfs: open code insert range extent split helper

The insert range operation currently splits the extent at the target
offset in a separate transaction and lock cycle from the one that
shifts extents. In preparation for reworking insert range into an
atomic operation, lift the code into the caller so it can be easily
condensed to a single rolling transaction and lock cycle and
eliminate the helper. No functional changes.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 9a6d7a84689abd37dbb6a8b7894f224ad0796671..43ae2ab21084d5fa546c563f8e4c899903056304 100644 (file)
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -6025,8 +6025,8 @@ del_cursor:
  * @split_fsb is a block where the extents is split.  If split_fsb lies in a
  * hole or the first block of extents, just return 0.
  */
-STATIC int
-xfs_bmap_split_extent_at(
+int
+xfs_bmap_split_extent(
        struct xfs_trans        *tp,
        struct xfs_inode        *ip,
        xfs_fileoff_t           split_fsb)
@@ -6142,34 +6142,6 @@ del_cursor:
        return error;
 }
 
-int
-xfs_bmap_split_extent(
-       struct xfs_inode        *ip,
-       xfs_fileoff_t           split_fsb)
-{
-       struct xfs_mount        *mp = ip->i_mount;
-       struct xfs_trans        *tp;
-       int                     error;
-
-       error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write,
-                       XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp);
-       if (error)
-               return error;
-
-       xfs_ilock(ip, XFS_ILOCK_EXCL);
-       xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
-
-       error = xfs_bmap_split_extent_at(tp, ip, split_fsb);
-       if (error)
-               goto out;
-
-       return xfs_trans_commit(tp);
-
-out:
-       xfs_trans_cancel(tp);
-       return error;
-}
-
 /* Deferred mapping is only for real extents in the data fork. */
 static bool
 xfs_bmap_is_update_needed(

diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index 14d25e0b7d9c8b3968ae092fd399e775936dec4c..f3259ad5c22cb9e723c876b40613f7e322a897f0 100644 (file)
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -222,7 +222,8 @@ int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off,
 int    xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip,
                xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
                bool *done, xfs_fileoff_t stop_fsb);
-int    xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
+int    xfs_bmap_split_extent(struct xfs_trans *tp, struct xfs_inode *ip,
+               xfs_fileoff_t split_offset);
 int    xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
                xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
                struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index e62fb5216341c25cd99288937881f6ceb1434e8c..4a9c037801deb092a54fd14db5b6d1ea0d580818 100644 (file)
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1151,7 +1151,19 @@ xfs_insert_file_space(
         * is not the starting block of extent, we need to split the extent at
         * stop_fsb.
         */
-       error = xfs_bmap_split_extent(ip, stop_fsb);
+       error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write,
+                       XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp);
+       if (error)
+               return error;
+
+       xfs_ilock(ip, XFS_ILOCK_EXCL);
+       xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+
+       error = xfs_bmap_split_extent(tp, ip, stop_fsb);
+       if (error)
+               goto out_trans_cancel;
+
+       error = xfs_trans_commit(tp);
        if (error)
                return error;