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scsi: lpfc: Enhancements to LOG_TRACE_EVENT for better readability

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While testing recent discovery node rework, several items were seen that
could be done better with respect to the new trace event logic.

1) in the following msg:
      kernel: lpfc 0000:44:00.0: start 35 end 35 cnt 0
   If cnt is zero in the 1st message, there is no reason to display the
   1st message, which is just giving start/end positioning.

   Fix by not displaying message if cnt is 0.

2) If the driver is loaded with module log verbosity off, and later a
   single NPIV host instance verbosity is enabled via sysfs, it enables
   messages on all instances. This is due to the trace log verbosity checks
   (lpfc_dmp_dbg) looking at the phba only. It should look at the phba and
   the vport.

   Fix by enabling a check on both phba and vport.

3) in the following messages:
       2904 Firmware Dump Image Present on Adapter
       2887 Reset Needed: Attempting Port Recovery...
   These messages are not necessary for the trace event log, which is
   primarily for discovery.

   Fix by changing log level on these 2 messages to LOG_SLI.

Link: https://lore.kernel.org/r/20210104180240.46824-15-jsmart2021@gmail.com
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2021-01-04 10:02:39 -08:00 committed by Martin K. Petersen
parent a22d73b655
commit 0b3ad32e26
2 changed files with 20 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/scsi/lpfc/lpfc_init.c
View File

@ -1865,7 +1865,7 @@ lpfc_sli4_port_sta_fn_reset(struct lpfc_hba *phba, int mbx_action,
/* need reset: attempt for port recovery */
if (en_rn_msg)
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"2887 Reset Needed: Attempting Port "
"Recovery...\n");
@ -14177,15 +14177,32 @@ void lpfc_dmp_dbg(struct lpfc_hba *phba)
int i;
int j = 0;
unsigned long rem_nsec;
struct lpfc_vport **vports;
/* Don't dump messages if we explicitly set log_verbose for the
* physical port or any vport.
*/
if (phba->cfg_log_verbose)
return;
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL) {
for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
if (vports[i]->cfg_log_verbose) {
lpfc_destroy_vport_work_array(phba, vports);
return;
}
}
}
lpfc_destroy_vport_work_array(phba, vports);
if (atomic_cmpxchg(&phba->dbg_log_dmping, 0, 1) != 0)
return;
start_idx = (unsigned int)atomic_read(&phba->dbg_log_idx) % DBG_LOG_SZ;
dbg_cnt = (unsigned int)atomic_read(&phba->dbg_log_cnt);
if (!dbg_cnt)
goto out;
temp_idx = start_idx;
if (dbg_cnt >= DBG_LOG_SZ) {
dbg_cnt = DBG_LOG_SZ;
@ -14215,6 +14232,7 @@ void lpfc_dmp_dbg(struct lpfc_hba *phba)
rem_nsec / 1000,
phba->dbg_log[temp_idx].log);
}
out:
atomic_set(&phba->dbg_log_cnt, 0);
atomic_set(&phba->dbg_log_dmping, 0);
}

2
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -7491,7 +7491,7 @@ static void lpfc_sli4_dip(struct lpfc_hba *phba)
return;
if (bf_get(lpfc_sliport_status_dip, &reg_data))
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"2904 Firmware Dump Image Present"
" on Adapter");
}