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Message-ID: <ed302c81f8d143449a26ecdb33a6f730@XCH-RCD-012.cisco.com>
Date: Thu, 18 Jan 2018 01:17:01 +0000
From: "Satish Kharat (satishkh)" <satishkh@...co.com>
To: Arnd Bergmann <arnd@...db.de>,
"Sesidhar Baddela (sebaddel)" <sebaddel@...co.com>,
"James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>
CC: "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] [RESEND] scsi: fnic: use 64-bit timestamps
Looks good to me.
Acked-by: Satish Kharat <satishkh@...co.com>
-----Original Message-----
From: Arnd Bergmann [mailto:arnd@...db.de]
Sent: Wednesday, January 17, 2018 7:17 AM
To: Satish Kharat (satishkh) <satishkh@...co.com>; Sesidhar Baddela (sebaddel) <sebaddel@...co.com>; Karan Tilak Kumar (kartilak) <kartilak@...co.com>; James E.J. Bottomley <jejb@...ux.vnet.ibm.com>; Martin K. Petersen <martin.petersen@...cle.com>
Cc: Arnd Bergmann <arnd@...db.de>; Vasyl Gomonovych <gomonovych@...il.com>; linux-scsi@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: [PATCH] [RESEND] scsi: fnic: use 64-bit timestamps
struct timespec is deprecated since it overflows in 2038 on 32-bit architectures, so we should use timespec64 consistently.
I'm slightly adapting the format strings here, to make sure we print the nanoseconds with the correct number of leading zeroes.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Originally submitted in November 2017. Martin asked Satish to review my patch, but I never heard back after that, so I'm trying again now.
---
drivers/scsi/fnic/fnic_debugfs.c | 2 +-
drivers/scsi/fnic/fnic_stats.h | 4 +--
drivers/scsi/fnic/fnic_trace.c | 58 ++++++++++++++++++++--------------------
3 files changed, 32 insertions(+), 32 deletions(-)
diff --git a/drivers/scsi/fnic/fnic_debugfs.c b/drivers/scsi/fnic/fnic_debugfs.c
index 9858484dd126..6d3e1cb4fea6 100644
--- a/drivers/scsi/fnic/fnic_debugfs.c
+++ b/drivers/scsi/fnic/fnic_debugfs.c
@@ -614,7 +614,7 @@ static ssize_t fnic_reset_stats_write(struct file *file,
sizeof(struct io_path_stats) - sizeof(u64));
memset(fw_stats_p+1, 0,
sizeof(struct fw_stats) - sizeof(u64));
- getnstimeofday(&stats->stats_timestamps.last_reset_time);
+ ktime_get_real_ts64(&stats->stats_timestamps.last_reset_time);
}
(*ppos)++;
diff --git a/drivers/scsi/fnic/fnic_stats.h b/drivers/scsi/fnic/fnic_stats.h index e007feedbf72..9daa6ada6fa0 100644
--- a/drivers/scsi/fnic/fnic_stats.h
+++ b/drivers/scsi/fnic/fnic_stats.h
@@ -18,8 +18,8 @@
#define _FNIC_STATS_H_
struct stats_timestamps {
- struct timespec last_reset_time;
- struct timespec last_read_time;
+ struct timespec64 last_reset_time;
+ struct timespec64 last_read_time;
};
struct io_path_stats {
diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c index 4826f596cb31..abddde11982b 100644
--- a/drivers/scsi/fnic/fnic_trace.c
+++ b/drivers/scsi/fnic/fnic_trace.c
@@ -111,7 +111,7 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
int len = 0;
unsigned long flags;
char str[KSYM_SYMBOL_LEN];
- struct timespec val;
+ struct timespec64 val;
fnic_trace_data_t *tbp;
spin_lock_irqsave(&fnic_trace_lock, flags); @@ -129,10 +129,10 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
/* Convert function pointer to function name */
if (sizeof(unsigned long) < 8) {
sprint_symbol(str, tbp->fnaddr.low);
- jiffies_to_timespec(tbp->timestamp.low, &val);
+ jiffies_to_timespec64(tbp->timestamp.low, &val);
} else {
sprint_symbol(str, tbp->fnaddr.val);
- jiffies_to_timespec(tbp->timestamp.val, &val);
+ jiffies_to_timespec64(tbp->timestamp.val, &val);
}
/*
* Dump trace buffer entry to memory file @@ -140,8 +140,8 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
*/
len += snprintf(fnic_dbgfs_prt->buffer + len,
(trace_max_pages * PAGE_SIZE * 3) - len,
- "%16lu.%16lu %-50s %8x %8x %16llx %16llx "
- "%16llx %16llx %16llx\n", val.tv_sec,
+ "%16llu.%09lu %-50s %8x %8x %16llx %16llx "
+ "%16llx %16llx %16llx\n", (u64)val.tv_sec,
val.tv_nsec, str, tbp->host_no, tbp->tag,
tbp->data[0], tbp->data[1], tbp->data[2],
tbp->data[3], tbp->data[4]);
@@ -171,10 +171,10 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
/* Convert function pointer to function name */
if (sizeof(unsigned long) < 8) {
sprint_symbol(str, tbp->fnaddr.low);
- jiffies_to_timespec(tbp->timestamp.low, &val);
+ jiffies_to_timespec64(tbp->timestamp.low, &val);
} else {
sprint_symbol(str, tbp->fnaddr.val);
- jiffies_to_timespec(tbp->timestamp.val, &val);
+ jiffies_to_timespec64(tbp->timestamp.val, &val);
}
/*
* Dump trace buffer entry to memory file @@ -182,8 +182,8 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
*/
len += snprintf(fnic_dbgfs_prt->buffer + len,
(trace_max_pages * PAGE_SIZE * 3) - len,
- "%16lu.%16lu %-50s %8x %8x %16llx %16llx "
- "%16llx %16llx %16llx\n", val.tv_sec,
+ "%16llu.%09lu %-50s %8x %8x %16llx %16llx "
+ "%16llx %16llx %16llx\n", (u64)val.tv_sec,
val.tv_nsec, str, tbp->host_no, tbp->tag,
tbp->data[0], tbp->data[1], tbp->data[2],
tbp->data[3], tbp->data[4]);
@@ -217,29 +217,29 @@ int fnic_get_stats_data(struct stats_debug_info *debug, {
int len = 0;
int buf_size = debug->buf_size;
- struct timespec val1, val2;
+ struct timespec64 val1, val2;
- getnstimeofday(&val1);
+ ktime_get_real_ts64(&val1);
len = snprintf(debug->debug_buffer + len, buf_size - len,
"------------------------------------------\n"
"\t\tTime\n"
"------------------------------------------\n");
len += snprintf(debug->debug_buffer + len, buf_size - len,
- "Current time : [%ld:%ld]\n"
- "Last stats reset time: [%ld:%ld]\n"
- "Last stats read time: [%ld:%ld]\n"
- "delta since last reset: [%ld:%ld]\n"
- "delta since last read: [%ld:%ld]\n",
- val1.tv_sec, val1.tv_nsec,
- stats->stats_timestamps.last_reset_time.tv_sec,
+ "Current time : [%lld:%ld]\n"
+ "Last stats reset time: [%lld:%09ld]\n"
+ "Last stats read time: [%lld:%ld]\n"
+ "delta since last reset: [%lld:%ld]\n"
+ "delta since last read: [%lld:%ld]\n",
+ (s64)val1.tv_sec, val1.tv_nsec,
+ (s64)stats->stats_timestamps.last_reset_time.tv_sec,
stats->stats_timestamps.last_reset_time.tv_nsec,
- stats->stats_timestamps.last_read_time.tv_sec,
+ (s64)stats->stats_timestamps.last_read_time.tv_sec,
stats->stats_timestamps.last_read_time.tv_nsec,
- timespec_sub(val1, stats->stats_timestamps.last_reset_time).tv_sec,
- timespec_sub(val1, stats->stats_timestamps.last_reset_time).tv_nsec,
- timespec_sub(val1, stats->stats_timestamps.last_read_time).tv_sec,
- timespec_sub(val1, stats->stats_timestamps.last_read_time).tv_nsec);
+ (s64)timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_sec,
+ timespec64_sub(val1, stats->stats_timestamps.last_reset_time).tv_nsec,
+ (s64)timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_sec,
+ timespec64_sub(val1, stats->stats_timestamps.last_read_time).tv_nsec);
stats->stats_timestamps.last_read_time = val1;
@@ -403,12 +403,12 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
"\t\tOther Important Statistics\n"
"------------------------------------------\n");
- jiffies_to_timespec(stats->misc_stats.last_isr_time, &val1);
- jiffies_to_timespec(stats->misc_stats.last_ack_time, &val2);
+ jiffies_to_timespec64(stats->misc_stats.last_isr_time, &val1);
+ jiffies_to_timespec64(stats->misc_stats.last_ack_time, &val2);
len += snprintf(debug->debug_buffer + len, buf_size - len,
- "Last ISR time: %llu (%8lu.%8lu)\n"
- "Last ACK time: %llu (%8lu.%8lu)\n"
+ "Last ISR time: %llu (%8llu.%09lu)\n"
+ "Last ACK time: %llu (%8llu.%09lu)\n"
"Number of ISRs: %lld\n"
"Maximum CQ Entries: %lld\n"
"Number of ACK index out of range: %lld\n"
@@ -425,9 +425,9 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
"Number of rport not ready: %lld\n"
"Number of receive frame errors: %lld\n",
(u64)stats->misc_stats.last_isr_time,
- val1.tv_sec, val1.tv_nsec,
+ (s64)val1.tv_sec, val1.tv_nsec,
(u64)stats->misc_stats.last_ack_time,
- val2.tv_sec, val2.tv_nsec,
+ (s64)val2.tv_sec, val2.tv_nsec,
(u64)atomic64_read(&stats->misc_stats.isr_count),
(u64)atomic64_read(&stats->misc_stats.max_cq_entries),
(u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
--
2.9.0
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