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nvme-tcp: enable TLS handshake upcall

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Add a fabrics option 'tls' and start the TLS handshake upcall
with the default PSK. When TLS is started the PSK key serial
number is displayed in the sysfs attribute 'tls_key'

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Hannes Reinecke
2023-08-24 16:39:15 +02:00
committed by Keith Busch
parent e40d4eb840
commit be8e82caa6
7 changed files with 185 additions and 7 deletions
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21
drivers/nvme/host/sysfs.c
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@@ -527,6 +527,19 @@ static DEVICE_ATTR(dhchap_ctrl_secret, S_IRUGO | S_IWUSR,
nvme_ctrl_dhchap_ctrl_secret_show, nvme_ctrl_dhchap_ctrl_secret_store);
#endif
#ifdef CONFIG_NVME_TCP_TLS
static ssize_t tls_key_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
if (!ctrl->tls_key)
return 0;
return sysfs_emit(buf, "%08x", key_serial(ctrl->tls_key));
}
static DEVICE_ATTR_RO(tls_key);
#endif
static struct attribute *nvme_dev_attrs[] = {
&dev_attr_reset_controller.attr,
&dev_attr_rescan_controller.attr,
@@ -553,6 +566,9 @@ static struct attribute *nvme_dev_attrs[] = {
#ifdef CONFIG_NVME_AUTH
&dev_attr_dhchap_secret.attr,
&dev_attr_dhchap_ctrl_secret.attr,
#endif
#ifdef CONFIG_NVME_TCP_TLS
&dev_attr_tls_key.attr,
#endif
NULL
};
@@ -583,6 +599,11 @@ static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj,
if (a == &dev_attr_dhchap_ctrl_secret.attr && !ctrl->opts)
return 0;
#endif
#ifdef CONFIG_NVME_TCP_TLS
if (a == &dev_attr_tls_key.attr &&
(!ctrl->opts || strcmp(ctrl->opts->transport, "tcp")))
return 0;
#endif
return a->mode;
}