[PATCH for-next 1/8] block/rnbd-clt: Make path parameter optional for map_device

[Jack Wang <jinpu.wang@cloud.ionos.com>]

From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>

During map_device if the given session exists, then the path parameter is
not used. In such a case, the path parameter is redundant.

This commit makes the path parameter optional for map_device. When the
path parameter is not given, if the session exists then that is used to
establish the rtrs connection.

If the session does not exist, and the path parameter is also missing,
then map_device fails.

Signed-off-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
---
 drivers/block/rnbd/rnbd-clt-sysfs.c | 1 -
 drivers/block/rnbd/rnbd-clt.c       | 6 ++++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/block/rnbd/rnbd-clt-sysfs.c b/drivers/block/rnbd/rnbd-clt-sysfs.c
index 4f4474eecadb..e7b41ec7cd6a 100644
--- a/drivers/block/rnbd/rnbd-clt-sysfs.c
+++ b/drivers/block/rnbd/rnbd-clt-sysfs.c
@@ -37,7 +37,6 @@ enum {
 };
 
 static const unsigned int rnbd_opt_mandatory[] = {
-	RNBD_OPT_PATH,
 	RNBD_OPT_DEV_PATH,
 	RNBD_OPT_SESSNAME,
 };
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index 8b2411ccbda9..edefa0761a81 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -1193,6 +1193,12 @@ find_and_get_or_create_sess(const char *sessname,
 	else if (!first)
 		return sess;
 
+	if (!path_cnt) {
+		pr_err("Session %s not found, and path parameter not given", sessname);
+		err = -ENXIO;
+		goto put_sess;
+	}
+
 	rtrs_ops = (struct rtrs_clt_ops) {
 		.priv = sess,
 		.link_ev = rnbd_clt_link_ev,
-- 
2.25.1