From: Tom Wu Date: Thu, 8 Aug 2019 02:22:36 +0000 (+0000) Subject: nvmet: fix data units read and written counters in SMART log X-Git-Tag: v5.2.19~153 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=3c971d5dc374054673b91e187e9fa6b7d7d99185;p=users%2Fdwmw2%2Flinux.git nvmet: fix data units read and written counters in SMART log [ 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 Reviewed-by: Israel Rukshin Reviewed-by: Max Gurtovoy Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig Signed-off-by: Sagi Grimberg Signed-off-by: Sasha Levin --- 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();