TUR checker should not return 'failed' for reservation conflict

Some SCSI-3 arrays might return 'Reservation conflict' even
for TEST UNIT READY. But this doesn't indicate that the path
is faulty. So we should return the proper status here.

References: bnc#498413

Signed-off-by: Hannes Reinecke <hare@suse.de>

diff --git a/libmultipath/checkers/tur.c b/libmultipath/checkers/tur.c
index 55fab26..8af5777 100644 (file)
--- a/libmultipath/checkers/tur.c
+++ b/libmultipath/checkers/tur.c
@@ -61,6 +61,14 @@ libcheck_check (struct checker * c)
                MSG(c, MSG_TUR_DOWN);
                return PATH_DOWN;
        }
+       if ((io_hdr.status & 0x7e) == 0x18) {
+               /*
+                * SCSI-3 arrays might return
+                * reservation conflict on TUR
+                */
+               MSG(c, MSG_TUR_UP);
+               return PATH_UP;
+       }
        if (io_hdr.info & SG_INFO_OK_MASK) {
                int key = 0, asc, ascq;