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

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>

diff --git a/drivers/scsi/lpfc/lpfc_bsg.c b/drivers/scsi/lpfc/lpfc_bsg.c
index b92aec9..82134d2 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_bsg.c
+++ b/drivers/scsi/lpfc/lpfc_bsg.c
@@ -2629,7 +2629,7 @@ static int lpfcdiag_loop_get_xri(struct lpfc_hba *phba, uint16_t rpi,
                                rspiocbq,
                                (phba->fc_ratov * 2)
                                + LPFC_DRVR_TIMEOUT);
-       if (iocb_stat) {
+       if ((iocb_stat != IOCB_SUCCESS) || (rsp->ulpStatus != IOSTAT_SUCCESS)) {
                ret_val = -EIO;
                goto err_get_xri_exit;
        }
@@ -3204,8 +3204,9 @@ lpfc_bsg_diag_loopback_run(struct fc_bsg_job *job)
                                             rspiocbq, (phba->fc_ratov * 2) +
                                             LPFC_DRVR_TIMEOUT);
 
-       if ((iocb_stat != IOCB_SUCCESS) || ((phba->sli_rev < LPFC_SLI_REV4) &&
-                                          (rsp->ulpStatus != IOCB_SUCCESS))) {
+       if ((iocb_stat != IOCB_SUCCESS) ||
+           ((phba->sli_rev < LPFC_SLI_REV4) &&
+            (rsp->ulpStatus != IOSTAT_SUCCESS))) {
                lpfc_printf_log(phba, KERN_ERR, LOG_LIBDFC,
                                "3126 Failed loopback test issue iocb: "
                                "iocb_stat:x%x\n", iocb_stat);

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 443bbca..b2ede05 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -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;
 }
 
 /**

diff --git a/drivers/scsi/lpfc/lpfc_scsi.h b/drivers/scsi/lpfc/lpfc_scsi.h
index b1d9f7f..852ff7d 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_scsi.h
+++ b/drivers/scsi/lpfc/lpfc_scsi.h
@@ -73,6 +73,7 @@ struct fcp_rsp {
 #define RSP_RO_MISMATCH_ERR  0x03
 #define RSP_TM_NOT_SUPPORTED 0x04      /* Task mgmt function not supported */
 #define RSP_TM_NOT_COMPLETED 0x05      /* Task mgmt function not performed */
+#define RSP_TM_INVALID_LU    0x09      /* Task mgmt function to invalid LU */
 
        uint32_t rspInfoRsvd;   /* FCP_RSP_INFO bytes 4-7 (reserved) */
 

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index a262d22..8f580fd 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -10196,6 +10196,11 @@ lpfc_sli_issue_iocb_wait(struct lpfc_hba *phba,
                if (iocb_completed) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                                        "0331 IOCB wake signaled\n");
+                       /* Note: we are not indicating if the IOCB has a success
+                        * status or not - that's for the caller to check.
+                        * IOCB_SUCCESS means just that the command was sent and
+                        * completed. Not that it completed successfully.
+                        * */
                } else if (timeleft == 0) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "0338 IOCB wait timeout error - no "