xfs: use new extent lookup helpers in __xfs_bunmapi

Source kernel commit: 7efc794561f6bfe34d26c3724289108f6cda3a4d

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/libxfs/xfs_bmap.c b/libxfs/xfs_bmap.c
index 263f64089edb2b285d82516d05413e6469adb0d3..b240c34bfe8120818be3a172135fa6f077608c52 100644 (file)
--- a/libxfs/xfs_bmap.c
+++ b/libxfs/xfs_bmap.c
@@ -5425,8 +5425,6 @@ __xfs_bunmapi(
 {
        xfs_btree_cur_t         *cur;           /* bmap btree cursor */
        xfs_bmbt_irec_t         del;            /* extent being deleted */
-       int                     eof;            /* is deleting at eof */
-       xfs_bmbt_rec_host_t     *ep;            /* extent record pointer */
        int                     error;          /* error return value */
        xfs_extnum_t            extno;          /* extent number in list */
        xfs_bmbt_irec_t         got;            /* current extent record */
@@ -5436,7 +5434,6 @@ __xfs_bunmapi(
        int                     logflags;       /* transaction logging flags */
        xfs_extlen_t            mod;            /* rt extent offset */
        xfs_mount_t             *mp;            /* mount structure */
-       xfs_bmbt_irec_t         prev;           /* previous extent record */
        xfs_fileoff_t           start;          /* first file offset deleted */
        int                     tmp_logflags;   /* partial logging flags */
        int                     wasdel;         /* was a delayed alloc extent */
@@ -5475,18 +5472,17 @@ __xfs_bunmapi(
        isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
        start = bno;
        bno = start + len - 1;
-       ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
-               &prev);
 
        /*
         * Check to see if the given block number is past the end of the
         * file, back up to the last block if so...
         */
-       if (eof) {
-               ep = xfs_iext_get_ext(ifp, --lastx);
-               xfs_bmbt_get_all(ep, &got);
+       if (!xfs_iext_lookup_extent(ip, ifp, bno, &lastx, &got)) {
+               ASSERT(lastx > 0);
+               xfs_iext_get_extent(ifp, --lastx, &got);
                bno = got.br_startoff + got.br_blockcount - 1;
        }
+
        logflags = 0;
        if (ifp->if_flags & XFS_IFBROOT) {
                ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
@@ -5517,8 +5513,7 @@ __xfs_bunmapi(
                if (got.br_startoff > bno) {
                        if (--lastx < 0)
                                break;
-                       ep = xfs_iext_get_ext(ifp, lastx);
-                       xfs_bmbt_get_all(ep, &got);
+                       xfs_iext_get_extent(ifp, lastx, &got);
                }
                /*
                 * Is the last block of this extent before the range
@@ -5532,7 +5527,6 @@ __xfs_bunmapi(
                 * Then deal with the (possibly delayed) allocated space
                 * we found.
                 */
-               ASSERT(ep != NULL);
                del = got;
                wasdel = isnullstartblock(del.br_startblock);
                if (got.br_startoff < start) {
@@ -5613,15 +5607,12 @@ __xfs_bunmapi(
                                 */
                                ASSERT(bno >= del.br_blockcount);
                                bno -= del.br_blockcount;
-                               if (got.br_startoff > bno) {
-                                       if (--lastx >= 0) {
-                                               ep = xfs_iext_get_ext(ifp,
-                                                                     lastx);
-                                               xfs_bmbt_get_all(ep, &got);
-                                       }
-                               }
+                               if (got.br_startoff > bno && --lastx >= 0)
+                                       xfs_iext_get_extent(ifp, lastx, &got);
                                continue;
                        } else if (del.br_state == XFS_EXT_UNWRITTEN) {
+                               struct xfs_bmbt_irec    prev;
+
                                /*
                                 * This one is already unwritten.
                                 * It must have a written left neighbor.
@@ -5629,8 +5620,7 @@ __xfs_bunmapi(
                                 * try again.
                                 */
                                ASSERT(lastx > 0);
-                               xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
-                                               lastx - 1), &prev);
+                               xfs_iext_get_extent(ifp, lastx - 1, &prev);
                                ASSERT(prev.br_state == XFS_EXT_NORM);
                                ASSERT(!isnullstartblock(prev.br_startblock));
                                ASSERT(del.br_startblock ==
@@ -5728,13 +5718,9 @@ nodelete:
                 */
                if (bno != (xfs_fileoff_t)-1 && bno >= start) {
                        if (lastx >= 0) {
-                               ep = xfs_iext_get_ext(ifp, lastx);
-                               if (xfs_bmbt_get_startoff(ep) > bno) {
-                                       if (--lastx >= 0)
-                                               ep = xfs_iext_get_ext(ifp,
-                                                                     lastx);
-                               }
-                               xfs_bmbt_get_all(ep, &got);
+                               xfs_iext_get_extent(ifp, lastx, &got);
+                               if (got.br_startoff > bno && --lastx >= 0)
+                                       xfs_iext_get_extent(ifp, lastx, &got);
                        }
                        extno++;
                }