[PATCH 05/18] scsi: hisi_sas: Add timestamp for a debugfs dump
From: John Garry
Date: Mon Oct 21 2019 - 12:26:38 EST
From: Luo Jiaxing <luojiaxing@xxxxxxxxxx>
It's useful to know when the dump occurred, so add a timestamp file for
this.
Signed-off-by: Luo Jiaxing <luojiaxing@xxxxxxxxxx>
Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
---
drivers/scsi/hisi_sas/hisi_sas.h | 2 ++
drivers/scsi/hisi_sas/hisi_sas_main.c | 7 +++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index 83232e8472fb..7069dae4cec9 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -21,6 +21,7 @@
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
+#include <linux/timer.h>
#include <scsi/sas_ata.h>
#include <scsi/libsas.h>
@@ -410,6 +411,7 @@ struct hisi_hba {
struct hisi_sas_iost *debugfs_iost;
struct hisi_sas_itct *debugfs_itct;
u64 *debugfs_iost_cache;
+ u64 debugfs_timestamp;
u64 *debugfs_itct_cache;
struct dentry *debugfs_dir;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index a7bac5dc389a..a983d08c03aa 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -3194,6 +3194,7 @@ static const struct file_operations hisi_sas_debugfs_itct_cache_fops = {
static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
{
+ u64 *debugfs_timestamp;
struct dentry *dump_dentry;
struct dentry *dentry;
char name[256];
@@ -3201,10 +3202,14 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
int c;
int d;
+ debugfs_timestamp = &hisi_hba->debugfs_timestamp;
/* Create dump dir inside device dir */
dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
hisi_hba->debugfs_dump_dentry = dump_dentry;
+ debugfs_create_u64("timestamp", 0400, dump_dentry,
+ debugfs_timestamp);
+
debugfs_create_file("global", 0400, dump_dentry, hisi_hba,
&hisi_sas_debugfs_global_fops);
@@ -3684,7 +3689,9 @@ void hisi_sas_debugfs_work_handler(struct work_struct *work)
{
struct hisi_hba *hisi_hba =
container_of(work, struct hisi_hba, debugfs_work);
+ u64 timestamp = local_clock() / NSEC_PER_MSEC;
+ hisi_hba->debugfs_timestamp = timestamp;
if (hisi_hba->debugfs_snapshot)
return;
hisi_hba->debugfs_snapshot = true;
--
2.17.1