[PATCH AUTOSEL 5.2 131/185] nvmet: fix data units read and written counters in SMART log

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Tom Wu <tomwu@xxxxxxxxxxxx>

[ Upstream commit 3bec2e3754becebd4c452999adb49bc62c575ea4 ]

In nvme spec 1.3 there is a definition for data write/read counters
from SMART log, (See section 5.14.1.2):
	This value is reported in thousands (i.e., a value of 1
	corresponds to 1000 units of 512 bytes read) and is rounded up.

However, in nvme target where value is reported with actual units,
but not thousands of units as the spec requires.

Signed-off-by: Tom Wu <tomwu@xxxxxxxxxxxx>
Reviewed-by: Israel Rukshin <israelr@xxxxxxxxxxxx>
Reviewed-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/nvme/target/admin-cmd.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 9f72d515fc4b3..4099093a17343 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -81,9 +81,11 @@ static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,
 		goto out;
 
 	host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]);
-	data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]);
+	data_units_read = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part,
+		sectors[READ]), 1000);
 	host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]);
-	data_units_written = part_stat_read(ns->bdev->bd_part, sectors[WRITE]);
+	data_units_written = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part,
+		sectors[WRITE]), 1000);
 
 	put_unaligned_le64(host_reads, &slog->host_reads[0]);
 	put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
@@ -111,11 +113,11 @@ static u16 nvmet_get_smart_log_all(struct nvmet_req *req,
 		if (!ns->bdev)
 			continue;
 		host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]);
-		data_units_read +=
-			part_stat_read(ns->bdev->bd_part, sectors[READ]);
+		data_units_read += DIV_ROUND_UP(
+			part_stat_read(ns->bdev->bd_part, sectors[READ]), 1000);
 		host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]);
-		data_units_written +=
-			part_stat_read(ns->bdev->bd_part, sectors[WRITE]);
+		data_units_written += DIV_ROUND_UP(
+			part_stat_read(ns->bdev->bd_part, sectors[WRITE]), 1000);
 
 	}
 	rcu_read_unlock();
-- 
2.20.1




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux