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scsi: core: Add I/O timeout count for SCSI device

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Currently struct scsi_device maintains counters for requests, completions,
and errors but is missing a counter for timeouts.

For better tracking of timeouts, add a suitable counter.

Link: https://lore.kernel.org/r/1663666339-17560-1-git-send-email-wubo40@huawei.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Wu Bo <wubo40@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Wu Bo 2022-09-20 17:32:19 +08:00 committed by Martin K. Petersen
parent 592642e6b1
commit 48517eefb2
3 changed files with 4 additions and 0 deletions
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1
drivers/scsi/scsi_error.c
View File

@ -334,6 +334,7 @@ enum blk_eh_timer_return scsi_timeout(struct request *req)
trace_scsi_dispatch_cmd_timeout(scmd);
scsi_log_completion(scmd, TIMEOUT_ERROR);
atomic_inc(&scmd->device->iotmo_cnt);
if (host->eh_deadline != -1 && !host->last_reset)
host->last_reset = jiffies;

2
drivers/scsi/scsi_sysfs.c
View File

@ -970,6 +970,7 @@ static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
show_sdev_iostat(iorequest_cnt);
show_sdev_iostat(iodone_cnt);
show_sdev_iostat(ioerr_cnt);
show_sdev_iostat(iotmo_cnt);
static ssize_t
sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
@ -1289,6 +1290,7 @@ static struct attribute *scsi_sdev_attrs[] = {
&dev_attr_iorequest_cnt.attr,
&dev_attr_iodone_cnt.attr,
&dev_attr_ioerr_cnt.attr,
&dev_attr_iotmo_cnt.attr,
&dev_attr_modalias.attr,
&dev_attr_queue_depth.attr,
&dev_attr_queue_type.attr,

1
include/scsi/scsi_device.h
View File

@ -231,6 +231,7 @@ struct scsi_device {
atomic_t iorequest_cnt;
atomic_t iodone_cnt;
atomic_t ioerr_cnt;
atomic_t iotmo_cnt;
struct device sdev_gendev,
sdev_dev;