From e10e1c9b0ae20ee550efb32b220239d35a00d1ac Mon Sep 17 00:00:00 2001
From: Chris Horn <chris.horn@hpe.com>
Date: Tue, 9 May 2023 14:05:21 -0600
Subject: [PATCH] LU-16998 lnet: Error when missing discover arg

Print an error when a user does not supply a NID argument to the
'lnetctl discover' command.

Test-Parameters: trivial
HPE-bug-id: LUS-11487
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: I081137db5490547a69248b7d2e7f7986b6d8612e
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51790
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---
 lnet/utils/lnetctl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lnet/utils/lnetctl.c b/lnet/utils/lnetctl.c
index 9eb8ecc..b5d9d16 100644
--- a/lnet/utils/lnetctl.c
+++ b/lnet/utils/lnetctl.c
@@ -3481,6 +3481,11 @@ static int jt_discover(int argc, char **argv)
 		}
 	}
 
+	if (optind == argc) {
+		printf("Missing nid argument\n");
+		return -1;
+	}
+
 	for (; optind < argc; optind++)
 		rc = lustre_lnet_discover_nid(argv[optind], force, -1, &show_rc,
 					      &err_rc);
-- 
1.8.3.1