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[SCSI] lpfc 8.3.43: Fixed not processing task management IOCB response status

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This patch implements the changes requested by Jeremy Linton:
http://marc.info/?l=linux-scsi&m=136242124409687&w=2

The patch revises the command issuing behavior, detecting cases where the
Task Mgmt command may have completed but with a non-successful status, which it
previously treated as a successful TMF. The patch also corrects a flushing of
I/O that was done which should only be done on successful TMF completion.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Smart
2013-10-10 12:24:07 -04:00
committed by James Bottomley
parent 725dd399ae
commit 53151bbb83
4 changed files with 104 additions and 21 deletions
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112
drivers/scsi/lpfc/lpfc_scsi.c
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@@ -4490,9 +4490,7 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
piocb->ulpContext =
vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
}
if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
piocb->ulpFCP2Rcvy = 1;
}
piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
/* ulpTimeout is only one byte */
@@ -4986,6 +4984,73 @@ lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
}
}
/**
* lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
* @vport: The virtual port for which this call is being executed.
* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
*
* This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
{
struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
uint32_t rsp_info;
uint32_t rsp_len;
uint8_t rsp_info_code;
int ret = FAILED;
if (fcprsp == NULL)
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0703 fcp_rsp is missing\n");
else {
rsp_info = fcprsp->rspStatus2;
rsp_len = be32_to_cpu(fcprsp->rspRspLen);
rsp_info_code = fcprsp->rspInfo3;
lpfc_printf_vlog(vport, KERN_INFO,
LOG_FCP,
"0706 fcp_rsp valid 0x%x,"
" rsp len=%d code 0x%x\n",
rsp_info,
rsp_len, rsp_info_code);
if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
switch (rsp_info_code) {
case RSP_NO_FAILURE:
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0715 Task Mgmt No Failure\n");
ret = SUCCESS;
break;
case RSP_TM_NOT_SUPPORTED: /* TM rejected */
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0716 Task Mgmt Target "
"reject\n");
break;
case RSP_TM_NOT_COMPLETED: /* TM failed */
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0717 Task Mgmt Target "
"failed TM\n");
break;
case RSP_TM_INVALID_LU: /* TM to invalid LU! */
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0718 Task Mgmt to invalid "
"LUN\n");
break;
}
}
}
return ret;
}
/**
* lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
* @vport: The virtual port for which this call is being executed.
@@ -5047,12 +5112,8 @@ lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (status != IOCB_SUCCESS) {
if (status == IOCB_TIMEDOUT) {
ret = TIMEOUT_ERROR;
} else
ret = FAILED;
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
if ((status != IOCB_SUCCESS) ||
(iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
"iocb_flag x%x\n",
@@ -5060,9 +5121,21 @@ lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
iocbqrsp->iocb.un.ulpWord[4],
iocbq->iocb_flag);
} else if (status == IOCB_BUSY)
ret = FAILED;
else
/* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
if (status == IOCB_SUCCESS) {
if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
/* Something in the FCP_RSP was invalid.
* Check conditions */
ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
else
ret = FAILED;
} else if (status == IOCB_TIMEDOUT) {
ret = TIMEOUT_ERROR;
} else {
ret = FAILED;
}
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
} else
ret = SUCCESS;
lpfc_sli_release_iocbq(phba, iocbqrsp);
@@ -5186,7 +5259,7 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
unsigned tgt_id = cmnd->device->id;
unsigned int lun_id = cmnd->device->lun;
struct lpfc_scsi_event_header scsi_event;
int status, ret = SUCCESS;
int status;
if (!rdata) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
@@ -5227,9 +5300,11 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
* So, continue on.
* We will report success if all the i/o aborts successfully.
*/
ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
if (status == SUCCESS)
status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
LPFC_CTX_LUN);
return ret;
return status;
}
/**
@@ -5253,7 +5328,7 @@ lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
unsigned tgt_id = cmnd->device->id;
unsigned int lun_id = cmnd->device->lun;
struct lpfc_scsi_event_header scsi_event;
int status, ret = SUCCESS;
int status;
if (!rdata) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
@@ -5294,9 +5369,10 @@ lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
* So, continue on.
* We will report success if all the i/o aborts successfully.
*/
ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
if (status == SUCCESS)
status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
LPFC_CTX_TGT);
return ret;
return status;
}
/**