Hid Don,
some comments at the end.
On 04/16/2015 03:47 PM, Don Brace wrote:
> From: Stephen Cameron <stephenmcame...@gmail.com>
>
> In hba mode, we could get sense data in descriptor format so
> we need to handle that.
>
> It's possible for CommandStatus to have value 0x0D
> "TMF Function Status", which we should handle. We will get
> this from a P1224 when aborting a non-existent tag, for
> example. The "ScsiStatus" field of the errinfo field
> will contain the TMF function status value.
>
> Reviewed-by: Scott Teel <scott.t...@pmcs.com>
> Reviewed-by: Kevin Barnett <kevin.barn...@pmcs.com>
> Signed-off-by: Don Brace <don.br...@pmcs.com>
> ---
> drivers/scsi/hpsa.c | 143
> +++++++++++++++++++++++++++++++++++------------
> drivers/scsi/hpsa_cmd.h | 9 +++
> 2 files changed, 117 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> index 6ee92af..68238dd 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -43,6 +43,7 @@
> #include <scsi/scsi_device.h>
> #include <scsi/scsi_host.h>
> #include <scsi/scsi_tcq.h>
> +#include <scsi/scsi_eh.h>
> #include <linux/cciss_ioctl.h>
> #include <linux/string.h>
> #include <linux/bitmap.h>
> @@ -268,16 +269,49 @@ static inline struct ctlr_info *shost_to_hba(struct
> Scsi_Host *sh)
> return (struct ctlr_info *) *priv;
> }
>
> +/* extract sense key, asc, and ascq from sense data. -1 means invalid. */
> +static void decode_sense_data(const u8 *sense_data, int sense_data_len,
> + int *sense_key, int *asc, int *ascq)
> +{
> + struct scsi_sense_hdr sshdr;
> + bool rc;
> +
> + *sense_key = -1;
> + *asc = -1;
> + *ascq = -1;
> +
> + if (sense_data_len < 1)
> + return;
> +
> + rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
> + if (rc) {
> + *sense_key = sshdr.sense_key;
> + *asc = sshdr.asc;
> + *ascq = sshdr.ascq;
> + }
> +}
> +
> static int check_for_unit_attention(struct ctlr_info *h,
> struct CommandList *c)
> {
> - if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
> + int sense_key, asc, ascq;
> + int sense_len;
> +
> + if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
> + sense_len = sizeof(c->err_info->SenseInfo);
> + else
> + sense_len = c->err_info->SenseLen;
> +
> + decode_sense_data(c->err_info->SenseInfo, sense_len,
> + &sense_key, &asc, &ascq);
> + if (sense_key != UNIT_ATTENTION || asc == -1)
> return 0;
>
> - switch (c->err_info->SenseInfo[12]) {
> + switch (asc) {
> case STATE_CHANGED:
> - dev_warn(&h->pdev->dev, HPSA "%d: a state change "
> - "detected, command retried\n", h->ctlr);
> + dev_warn(&h->pdev->dev,
> + HPSA "%d: a state change detected, command retried\n",
> + h->ctlr);
> break;
> case LUN_FAILED:
> dev_warn(&h->pdev->dev,
> @@ -1860,6 +1894,34 @@ retry_cmd:
> queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
> }
>
> +/* Returns 0 on success, < 0 otherwise. */
> +static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
> + struct CommandList *cp)
> +{
> + u8 tmf_status = cp->err_info->ScsiStatus;
> +
> + switch (tmf_status) {
> + case CISS_TMF_COMPLETE:
> + /*
> + * CISS_TMF_COMPLETE never happens, instead,
> + * ei->CommandStatus == 0 for this case.
> + */
> + case CISS_TMF_SUCCESS:
> + return 0;
> + case CISS_TMF_INVALID_FRAME:
> + case CISS_TMF_NOT_SUPPORTED:
> + case CISS_TMF_FAILED:
> + case CISS_TMF_WRONG_LUN:
> + case CISS_TMF_OVERLAPPED_TAG:
> + break;
> + default:
> + dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
> + tmf_status);
> + break;
> + }
> + return -tmf_status;
> +}
> +
> static void complete_scsi_command(struct CommandList *cp)
> {
> struct scsi_cmnd *cmd;
> @@ -1867,9 +1929,9 @@ static void complete_scsi_command(struct CommandList
> *cp)
> struct ErrorInfo *ei;
> struct hpsa_scsi_dev_t *dev;
>
> - unsigned char sense_key;
> - unsigned char asc; /* additional sense code */
> - unsigned char ascq; /* additional sense code qualifier */
> + int sense_key;
> + int asc; /* additional sense code */
> + int ascq; /* additional sense code qualifier */
> unsigned long sense_data_size;
>
> ei = cp->err_info;
> @@ -1904,8 +1966,6 @@ static void complete_scsi_command(struct CommandList
> *cp)
> if (cp->cmd_type == CMD_IOACCEL2)
> return process_ioaccel2_completion(h, cp, cmd, dev);
>
> - cmd->result |= ei->ScsiStatus;
> -
> scsi_set_resid(cmd, ei->ResidualCnt);
> if (ei->CommandStatus == 0) {
> if (cp->cmd_type == CMD_IOACCEL1)
> @@ -1915,16 +1975,6 @@ static void complete_scsi_command(struct CommandList
> *cp)
> return;
> }
>
> - /* copy the sense data */
> - if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
> - sense_data_size = SCSI_SENSE_BUFFERSIZE;
> - else
> - sense_data_size = sizeof(ei->SenseInfo);
> - if (ei->SenseLen < sense_data_size)
> - sense_data_size = ei->SenseLen;
> -
> - memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
> -
> /* For I/O accelerator commands, copy over some fields to the normal
> * CISS header used below for error handling.
> */
> @@ -1956,14 +2006,18 @@ static void complete_scsi_command(struct CommandList
> *cp)
> switch (ei->CommandStatus) {
>
> case CMD_TARGET_STATUS:
> - if (ei->ScsiStatus) {
> - /* Get sense key */
> - sense_key = 0xf & ei->SenseInfo[2];
> - /* Get additional sense code */
> - asc = ei->SenseInfo[12];
> - /* Get addition sense code qualifier */
> - ascq = ei->SenseInfo[13];
> - }
> + cmd->result |= ei->ScsiStatus;
> + /* copy the sense data */
> + if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
> + sense_data_size = SCSI_SENSE_BUFFERSIZE;
> + else
> + sense_data_size = sizeof(ei->SenseInfo);
> + if (ei->SenseLen < sense_data_size)
> + sense_data_size = ei->SenseLen;
> + memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
> + if (ei->ScsiStatus)
> + decode_sense_data(ei->SenseInfo, sense_data_size,
> + &sense_key, &asc, &ascq);
> if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
> if (sense_key == ABORTED_COMMAND) {
> cmd->result |= DID_SOFT_ERROR << 16;
> @@ -2058,6 +2112,10 @@ static void complete_scsi_command(struct CommandList
> *cp)
> cmd->result = DID_ERROR << 16;
> dev_warn(&h->pdev->dev, "Command unabortable\n");
> break;
> + case CMD_TMF_STATUS:
> + if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
> + cmd->result = DID_ERROR << 16;
> + break;
> case CMD_IOACCEL_DISABLED:
> /* This only handles the direct pass-through case since RAID
> * offload is handled above. Just attempt a retry.
> @@ -2208,16 +2266,22 @@ static void hpsa_scsi_interpret_error(struct
> ctlr_info *h,
> {
> const struct ErrorInfo *ei = cp->err_info;
> struct device *d = &cp->h->pdev->dev;
> - const u8 *sd = ei->SenseInfo;
> + int sense_key, asc, ascq, sense_len;
>
> switch (ei->CommandStatus) {
> case CMD_TARGET_STATUS:
> + if (ei->SenseLen > sizeof(ei->SenseInfo))
> + sense_len = sizeof(ei->SenseInfo);
> + else
> + sense_len = ei->SenseLen;
> + decode_sense_data(ei->SenseInfo, sense_len,
> + &sense_key, &asc, &ascq);
> hpsa_print_cmd(h, "SCSI status", cp);
> if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
> - dev_warn(d, "SCSI Status = 02, Sense key = %02x, ASC =
> %02x, ASCQ = %02x\n",
> - sd[2] & 0x0f, sd[12], sd[13]);
> + dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC
> = 0x%02x, ASCQ = 0x%02x\n",
> + sense_key, asc, ascq);
> else
> - dev_warn(d, "SCSI Status = %02x\n", ei->ScsiStatus);
> + dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
> if (ei->ScsiStatus == 0)
> dev_warn(d, "SCSI status is abnormally zero. "
> "(probably indicates selection timeout "
> @@ -2762,7 +2826,8 @@ static int hpsa_volume_offline(struct ctlr_info *h,
> unsigned char scsi3addr[])
> {
> struct CommandList *c;
> - unsigned char *sense, sense_key, asc, ascq;
> + unsigned char *sense;
> + int sense_key, asc, ascq, sense_len;
> int rc, ldstat = 0;
> u16 cmd_status;
> u8 scsi_status;
> @@ -2780,9 +2845,11 @@ static int hpsa_volume_offline(struct ctlr_info *h,
> return 0;
> }
> sense = c->err_info->SenseInfo;
> - sense_key = sense[2];
> - asc = sense[12];
> - ascq = sense[13];
> + if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
> + sense_len = sizeof(c->err_info->SenseInfo);
> + else
> + sense_len = c->err_info->SenseLen;
> + decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
> cmd_status = c->err_info->CommandStatus;
> scsi_status = c->err_info->ScsiStatus;
> cmd_free(h, c);
> @@ -2858,6 +2925,9 @@ static int hpsa_device_supports_aborts(struct ctlr_info
> *h,
> case CMD_ABORT_FAILED:
> rc = 1;
> break;
> + case CMD_TMF_STATUS:
> + rc = hpsa_evaluate_tmf_status(h, c);
> + break;
> default:
> rc = 0;
> break;
> @@ -4665,6 +4735,9 @@ static int hpsa_send_abort(struct ctlr_info *h,
> unsigned char *scsi3addr,
> switch (ei->CommandStatus) {
> case CMD_SUCCESS:
> break;
> + case CMD_TMF_STATUS:
> + rc = hpsa_evaluate_tmf_status(h, c);
> + break;
> case CMD_UNABORTABLE: /* Very common, don't make noise. */
> rc = -1;
> break;
Hmm. It feels weird, to have ASC and ASCQ values as integers ...
any specifc reasons for this?
If not, why can't you keep them as unsigned char ?
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
h...@suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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