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-rw-r--r--fs/xfs/xfs_fsmap.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 7d0b09c1366e..5f603ed3f678 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -523,27 +523,37 @@ xfs_getfsmap_rtdev_rtbitmap_query(
{
struct xfs_rtalloc_rec alow = { 0 };
struct xfs_rtalloc_rec ahigh = { 0 };
+ struct xfs_mount *mp = tp->t_mountp;
int error;
- xfs_ilock(tp->t_mountp->m_rbmip, XFS_ILOCK_SHARED);
+ xfs_ilock(mp->m_rbmip, XFS_ILOCK_SHARED);
+ /*
+ * Set up query parameters to return free rtextents covering the range
+ * we want.
+ */
alow.ar_startext = info->low.rm_startblock;
ahigh.ar_startext = info->high.rm_startblock;
- do_div(alow.ar_startext, tp->t_mountp->m_sb.sb_rextsize);
- if (do_div(ahigh.ar_startext, tp->t_mountp->m_sb.sb_rextsize))
+ do_div(alow.ar_startext, mp->m_sb.sb_rextsize);
+ if (do_div(ahigh.ar_startext, mp->m_sb.sb_rextsize))
ahigh.ar_startext++;
error = xfs_rtalloc_query_range(tp, &alow, &ahigh,
xfs_getfsmap_rtdev_rtbitmap_helper, info);
if (error)
goto err;
- /* Report any gaps at the end of the rtbitmap */
+ /*
+ * Report any gaps at the end of the rtbitmap by simulating a null
+ * rmap starting at the block after the end of the query range.
+ */
info->last = true;
+ ahigh.ar_startext = min(mp->m_sb.sb_rextents, ahigh.ar_startext);
+
error = xfs_getfsmap_rtdev_rtbitmap_helper(tp, &ahigh, info);
if (error)
goto err;
err:
- xfs_iunlock(tp->t_mountp->m_rbmip, XFS_ILOCK_SHARED);
+ xfs_iunlock(mp->m_rbmip, XFS_ILOCK_SHARED);
return error;
}