libmultipath: tur checker: leave unsupported paths alone

A checker shouldn't set the path state to PATH_DOWN if it fails
to obtain information about the path in the first place. Add logic
to the checker to distinguish a failed path from an unsupported path.

Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Martin Wilck <mwilck@suse.com>

diff --git a/libmultipath/checkers/tur.c b/libmultipath/checkers/tur.c
index 22734be..a27474f 100644 (file)
--- a/libmultipath/checkers/tur.c
+++ b/libmultipath/checkers/tur.c
@@ -125,6 +125,10 @@ retry:
        io_hdr.timeout = timeout * 1000;
        io_hdr.pack_id = 0;
        if (ioctl(fd, SG_IO, &io_hdr) < 0) {
        io_hdr.timeout = timeout * 1000;
        io_hdr.pack_id = 0;
        if (ioctl(fd, SG_IO, &io_hdr) < 0) {

+               if (errno == ENOTTY) {
+                       *msgid = CHECKER_MSGID_UNSUPPORTED;
+                       return PATH_WILD;
+               }

                *msgid = CHECKER_MSGID_DOWN;
                return PATH_DOWN;
        }
                *msgid = CHECKER_MSGID_DOWN;
                return PATH_DOWN;
        }