LU-11848 lov: FIEMAP support for PFL and FLR file

[fs/lustre-release.git] / lustre / lov / lov_offset.c

diff --git a/lustre/lov/lov_offset.c b/lustre/lov/lov_offset.c
index 6ed52e2..8540ccd 100644 (file)
--- a/lustre/lov/lov_offset.c
+++ b/lustre/lov/lov_offset.c
@@ -237,6 +237,8 @@ loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
  * given an extent in an lov and a stripe, calculate the extent of the stripe
  * that is contained within the lov extent.  this returns true if the given
  * stripe does intersect with the lov extent.
+ *
+ * Closed interval [@obd_start, @obd_end] will be returned if caller needs them.
  */
 int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
                          struct lu_extent *ext, u64 *obd_start, u64 *obd_end)
@@ -244,10 +246,16 @@ int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
        struct lov_stripe_md_entry *entry = lsm->lsm_entries[index];
        u64 start, end;
        int start_side, end_side;
+       u64 loc_start, loc_end;
 
        if (!lu_extent_is_overlapped(ext, &entry->lsme_extent))
                        return 0;
 
+       if (!obd_start)
+               obd_start = &loc_start;
+       if (!obd_end)
+               obd_end = &loc_end;
+
        start = max_t(__u64, ext->e_start, entry->lsme_extent.e_start);
        end = min_t(__u64, ext->e_end, entry->lsme_extent.e_end);
        if (end != OBD_OBJECT_EOF)