@@ -485,43 +485,17 @@ static int set_mode_select(struct scsi_device *sdev, struct rdac_dh_data *h)
static int mode_select_handle_sense(struct scsi_device *sdev,
struct scsi_sense_hdr *sense_hdr)
{
- int err = SCSI_DH_IO;
struct rdac_dh_data *h = sdev->handler_data;
if (!scsi_sense_valid(sense_hdr))
- goto done;
-
- switch (sense_hdr->sense_key) {
- case NO_SENSE:
- case ABORTED_COMMAND:
- case UNIT_ATTENTION:
- err = SCSI_DH_RETRY;
- break;
- case NOT_READY:
- if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01)
- /* LUN Not Ready and is in the Process of Becoming
- * Ready
- */
- err = SCSI_DH_RETRY;
- break;
- case ILLEGAL_REQUEST:
- if (sense_hdr->asc == 0x91 && sense_hdr->ascq == 0x36)
- /*
- * Command Lock contention
- */
- err = SCSI_DH_IMM_RETRY;
- break;
- default:
- break;
- }
+ return SCSI_DH_IO;
RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
"MODE_SELECT returned with sense %02x/%02x/%02x",
(char *) h->ctlr->array_name, h->ctlr->index,
sense_hdr->sense_key, sense_hdr->asc, sense_hdr->ascq);
-done:
- return err;
+ return SCSI_DH_IO;
}
static void send_mode_select(struct work_struct *work)
@@ -530,7 +504,7 @@ static void send_mode_select(struct work_struct *work)
container_of(work, struct rdac_controller, ms_work);
struct scsi_device *sdev = ctlr->ms_sdev;
struct rdac_dh_data *h = sdev->handler_data;
- int err = SCSI_DH_OK, retry_cnt = RDAC_RETRY_COUNT;
+ int err = SCSI_DH_OK;
struct rdac_queue_data *tmp, *qdata;
LIST_HEAD(list);
unsigned char cdb[MAX_COMMAND_SIZE];
@@ -538,8 +512,52 @@ static void send_mode_select(struct work_struct *work)
unsigned int data_size;
blk_opf_t opf = REQ_OP_DRV_OUT | REQ_FAILFAST_DEV |
REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER;
+ struct scsi_failure failures[] = {
+ {
+ .sense = NO_SENSE,
+ .asc = SCMD_FAILURE_ASC_ANY,
+ .ascq = SCMD_FAILURE_ASCQ_ANY,
+ .allowed = RDAC_RETRY_COUNT,
+ .result = SAM_STAT_CHECK_CONDITION,
+ },
+ {
+ .sense = ABORTED_COMMAND,
+ .asc = SCMD_FAILURE_ASC_ANY,
+ .ascq = SCMD_FAILURE_ASCQ_ANY,
+ .allowed = RDAC_RETRY_COUNT,
+ .result = SAM_STAT_CHECK_CONDITION,
+ },
+ {
+ .sense = UNIT_ATTENTION,
+ .asc = SCMD_FAILURE_ASC_ANY,
+ .ascq = SCMD_FAILURE_ASCQ_ANY,
+ .allowed = RDAC_RETRY_COUNT,
+ .result = SAM_STAT_CHECK_CONDITION,
+ },
+ {
+ /*
+ * LUN Not Ready and is in the Process of Becoming
+ * Ready
+ */
+ .sense = NOT_READY,
+ .asc = 0x04,
+ .ascq = 0x01,
+ .allowed = RDAC_RETRY_COUNT,
+ .result = SAM_STAT_CHECK_CONDITION,
+ },
+ {
+ /* Command Lock contention */
+ .sense = ILLEGAL_REQUEST,
+ .asc = 0x91,
+ .ascq = 0x36,
+ .allowed = SCMD_FAILURE_NO_LIMIT,
+ .result = SAM_STAT_CHECK_CONDITION,
+ },
+ {},
+ };
const struct scsi_exec_args exec_args = {
.sshdr = &sshdr,
+ .failures = failures,
};
spin_lock(&ctlr->ms_lock);
@@ -548,24 +566,17 @@ static void send_mode_select(struct work_struct *work)
ctlr->ms_sdev = NULL;
spin_unlock(&ctlr->ms_lock);
- retry:
memset(cdb, 0, sizeof(cdb));
data_size = rdac_failover_get(ctlr, &list, cdb);
- RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
- "%s MODE_SELECT command",
- (char *) h->ctlr->array_name, h->ctlr->index,
- (retry_cnt == RDAC_RETRY_COUNT) ? "queueing" : "retrying");
+ RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, MODE_SELECT command",
+ (char *)h->ctlr->array_name, h->ctlr->index);
if (scsi_execute_cmd(sdev, cdb, opf, &h->ctlr->mode_select, data_size,
- RDAC_TIMEOUT * HZ, RDAC_RETRIES, &exec_args)) {
+ RDAC_TIMEOUT * HZ, RDAC_RETRIES, &exec_args))
err = mode_select_handle_sense(sdev, &sshdr);
- if (err == SCSI_DH_RETRY && retry_cnt--)
- goto retry;
- if (err == SCSI_DH_IMM_RETRY)
- goto retry;
- }
+
if (err == SCSI_DH_OK) {
h->state = RDAC_STATE_ACTIVE;
RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
This has rdac have scsi-ml retry errors instead of driving them itself. There is one behavior change with this patch. We used to get a total of 5 retries for errors mode_select_handle_sense returned SCSI_DH_RETRY. We now get 5 retries for each failure. Signed-off-by: Mike Christie <michael.christie@oracle.com> --- drivers/scsi/device_handler/scsi_dh_rdac.c | 91 ++++++++++++---------- 1 file changed, 51 insertions(+), 40 deletions(-)