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nvme-sysfs: add 'tls_keyring' attribute

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Add a 'tls_keyring' attribute to display the contents of the
--keyring option from the connect string. Adding this attribute
allows us to recreate the original connect string from sysfs
settings.

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 14:02:24 +02:00 committed by Keith Busch
parent f5eb739747
commit 02a3688c53
1 changed files with 14 additions and 0 deletions
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14
drivers/nvme/host/sysfs.c
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@ -753,9 +753,20 @@ static ssize_t tls_configured_key_show(struct device *dev,
}
static DEVICE_ATTR_RO(tls_configured_key);
static ssize_t tls_keyring_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
struct key *keyring = ctrl->opts->keyring;
return sysfs_emit(buf, "%s\n", keyring->description);
}
static DEVICE_ATTR_RO(tls_keyring);
static struct attribute *nvme_tls_attrs[] = {
&dev_attr_tls_key.attr,
&dev_attr_tls_configured_key.attr,
&dev_attr_tls_keyring.attr,
};
static umode_t nvme_tls_attrs_are_visible(struct kobject *kobj,
@ -773,6 +784,9 @@ static umode_t nvme_tls_attrs_are_visible(struct kobject *kobj,
if (a == &dev_attr_tls_configured_key.attr &&
!ctrl->opts->tls_key)
return 0;
if (a == &dev_attr_tls_keyring.attr &&
!ctrl->opts->keyring)
return 0;
return a->mode;
}