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nvme-sysfs: add 'tls_configured_key' sysfs attribute

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There is a difference between the negotiated TLS key (which is
always present for a TLS encrypted connection) and the configured
TLS key (which is specified with the --tls_key command line option).
To differentate between these two add a new sysfs attribute
'tls_configured_key' to hold the specified on the command line.

Signed-off-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Hannes Reinecke 2024-07-22 14:02:23 +02:00 committed by Keith Busch
parent 1e48b34c9b
commit f5eb739747
1 changed files with 14 additions and 0 deletions
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14
drivers/nvme/host/sysfs.c
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@ -743,8 +743,19 @@ static ssize_t tls_key_show(struct device *dev,
}
static DEVICE_ATTR_RO(tls_key);
static ssize_t tls_configured_key_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
struct key *key = ctrl->opts->tls_key;
return sysfs_emit(buf, "%08x\n", key_serial(key));
}
static DEVICE_ATTR_RO(tls_configured_key);
static struct attribute *nvme_tls_attrs[] = {
&dev_attr_tls_key.attr,
&dev_attr_tls_configured_key.attr,
};
static umode_t nvme_tls_attrs_are_visible(struct kobject *kobj,
@ -759,6 +770,9 @@ static umode_t nvme_tls_attrs_are_visible(struct kobject *kobj,
if (a == &dev_attr_tls_key.attr &&
!ctrl->opts->tls)
return 0;
if (a == &dev_attr_tls_configured_key.attr &&
!ctrl->opts->tls_key)
return 0;
return a->mode;
}