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| author | Mike Christie <michael.christie@oracle.com> | 2022-08-12 04:00:22 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-09-07 05:05:58 +0300 |
| commit | 377a7b0b1e5fd157547904874c84331b32df1109 (patch) | |
| tree | 78c7ceb09d7e38eaf7729a2b4a0ac0b4aeb4e36b | |
| parent | beb4dac8d23546c14c77fce724a214348523d503 (diff) | |
| download | linux-377a7b0b1e5fd157547904874c84331b32df1109.tar.xz | |
scsi: virtio_scsi: Drop DID_NEXUS_FAILURE use
DID_NEXUS_FAILURE is internal to the SCSI layer. Drivers must not use it
because:
1. It's not propagated upwards, so SG IO/passthrough users will not see an
error and think a command was successful.
2. There is no handling for it in scsi_decide_disposition() so it results
in entering SCSI error handling.
virtio_scsi gets this when something like qemu returns
VIRTIO_SCSI_S_NEXUS_FAILURE. It looks like qemu returns that error code if
host OS returns DID_NEXUS_FAILURE (qemu's internal
SCSI_HOST_RESERVATION_ERROR maps to DID_NEXUS_FAILURE). This shouldn't
happen for Linux since we don't propagate that error code to userspace.
This has us convert VIRTIO_SCSI_S_NEXUS_FAILURE to a
SAM_STAT_RESERVATION_CONFLICT in case some other virt layer is returning
it. In that case we will still get the reservation confict failure we
expect.
Link: https://lore.kernel.org/r/20220812010027.8251-6-michael.christie@oracle.com
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/virtio_scsi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 112d8c3962b0..00cf6743db8c 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -144,7 +144,7 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf) set_host_byte(sc, DID_BAD_TARGET); break; case VIRTIO_SCSI_S_NEXUS_FAILURE: - set_host_byte(sc, DID_NEXUS_FAILURE); + set_status_byte(sc, SAM_STAT_RESERVATION_CONFLICT); break; default: scmd_printk(KERN_WARNING, sc, "Unknown response %d", |