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scsi-generic: look at host status 

Pass down the host status so that failing transport can be detected
by the guest.  Similar treatment of host status could be done in
virtio-blk, too.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-10-12 14:53:43 +02:00 committed by Kevin Wolf
parent fe0ed71279
commit a3b16e71ab
1 changed files with 16 additions and 4 deletions
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20
hw/scsi-generic.c
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@ -39,8 +39,13 @@ do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
#define SCSI_SENSE_BUF_SIZE 96
#define SG_ERR_DRIVER_TIMEOUT 0x06
#define SG_ERR_DRIVER_SENSE 0x08
#define SG_ERR_DRIVER_TIMEOUT 0x06
#define SG_ERR_DRIVER_SENSE 0x08
#define SG_ERR_DID_OK 0x00
#define SG_ERR_DID_NO_CONNECT 0x01
#define SG_ERR_DID_BUS_BUSY 0x02
#define SG_ERR_DID_TIME_OUT 0x03
#ifndef MAX_UINT
#define MAX_UINT ((unsigned int)-1)
@ -68,8 +73,9 @@ static void scsi_command_complete(void *opaque, int ret)
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
r->req.aiocb = NULL;
if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE)
if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
r->req.sense_len = r->io_header.sb_len_wr;
}
if (ret != 0) {
switch (ret) {
@ -86,9 +92,15 @@ static void scsi_command_complete(void *opaque, int ret)
break;
}
} else {
if (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT) {
if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
r->io_header.host_status == SG_ERR_DID_BUS_BUSY ||
r->io_header.host_status == SG_ERR_DID_TIME_OUT ||
(r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) {
status = BUSY;
BADF("Driver Timeout\n");
} else if (r->io_header.host_status) {
status = CHECK_CONDITION;
scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS));
} else if (r->io_header.status) {
status = r->io_header.status;
} else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {