From: Hannes Reinecke <hare@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Keith Busch <keith.busch@wdc.com>,
Sagi Grimberg <sagi@grimberg.me>, Daniel Wagner <dwagner@suse.de>,
linux-nvme@lists.infradead.org, Hannes Reinecke <hare@suse.de>,
Chao Leng <lengchao@huawei.com>
Subject: [PATCH 3/3] nvme: add 'kato' sysfs attribute
Date: Tue, 2 Mar 2021 10:26:44 +0100 [thread overview]
Message-ID: <20210302092644.80701-4-hare@suse.de> (raw)
In-Reply-To: <20210302092644.80701-1-hare@suse.de>
Add a 'kato' controller sysfs attribute to display the current
keep-alive timeout value (if any). This allows userspace to identify
persistent discovery controllers, as these will have a non-zero
KATO value.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/nvme/host/core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 6d096d41a82f..4f92c5035045 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3554,6 +3554,7 @@ nvme_show_int_function(cntlid);
nvme_show_int_function(numa_node);
nvme_show_int_function(queue_count);
nvme_show_int_function(sqsize);
+nvme_show_int_function(kato);
static ssize_t nvme_sysfs_delete(struct device *dev,
struct device_attribute *attr, const char *buf,
@@ -3720,6 +3721,7 @@ static struct attribute *nvme_dev_attrs[] = {
&dev_attr_hostid.attr,
&dev_attr_ctrl_loss_tmo.attr,
&dev_attr_reconnect_delay.attr,
+ &dev_attr_kato.attr,
NULL
};
--
2.29.2
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next prev parent reply other threads:[~2021-03-02 9:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 9:26 [PATCHv2 0/3] nvme: sanitize KATO handling Hannes Reinecke
2021-03-02 9:26 ` [PATCH 1/3] nvme: fixup kato deadlock Hannes Reinecke
2021-03-03 8:42 ` Christoph Hellwig
2021-03-03 12:01 ` Hannes Reinecke
2021-03-03 12:35 ` Christoph Hellwig
2021-03-03 13:11 ` Hannes Reinecke
2021-03-03 14:23 ` Hannes Reinecke
2021-03-04 8:02 ` Christoph Hellwig
2021-03-04 8:56 ` Hannes Reinecke
2021-03-02 9:26 ` [PATCH 2/3] nvme: sanitize KATO setting Hannes Reinecke
2021-03-03 8:53 ` Chao Leng
2021-03-03 12:40 ` Christoph Hellwig
2021-03-05 20:38 ` Sagi Grimberg
2021-03-08 13:11 ` Max Gurtovoy
2021-03-08 13:54 ` Hannes Reinecke
2021-03-02 9:26 ` Hannes Reinecke [this message]
2021-03-05 20:38 ` [PATCH 3/3] nvme: add 'kato' sysfs attribute Sagi Grimberg
2021-03-08 13:06 ` Max Gurtovoy
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