netdev - [PATCH iproute2-next] bridge: vlan: dump port only if there are any vlans

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Message-Id: <20210423115259.3660733-1-razor@blackwall.org>
Date:   Fri, 23 Apr 2021 14:52:59 +0300
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     netdev@...r.kernel.org
Cc:     dsahern@...il.com, roopa@...dia.com,
        Nikolay Aleksandrov <nikolay@...dia.com>
Subject: [PATCH iproute2-next] bridge: vlan: dump port only if there are any vlans

From: Nikolay Aleksandrov <nikolay@...dia.com>

When I added support for new vlan rtm dumping, I made a mistake in the
output format when there are no vlans on the port. This patch fixes it by
not printing ports without vlan entries (similar to current situation).

Fixes: e5f87c834193 ("bridge: vlan: add support for the new rtm dump call")
Signed-off-by: Nikolay Aleksandrov <nikolay@...dia.com>
---
Targeted at next since the patches were applied there recently.

 bridge/vlan.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/bridge/vlan.c b/bridge/vlan.c
index 9bb9e28d11bb..c6f68e5673a7 100644
--- a/bridge/vlan.c
+++ b/bridge/vlan.c
@@ -626,7 +626,6 @@ int print_vlan_rtm(struct nlmsghdr *n, void *arg, bool monitor)
 	struct rtattr *vtb[BRIDGE_VLANDB_ENTRY_MAX + 1], *a;
 	struct br_vlan_msg *bvm = NLMSG_DATA(n);
 	int len = n->nlmsg_len;
-	bool newport = false;
 	int rem;
 
 	if (n->nlmsg_type != RTM_NEWVLAN && n->nlmsg_type != RTM_DELVLAN &&
@@ -654,12 +653,9 @@ int print_vlan_rtm(struct nlmsghdr *n, void *arg, bool monitor)
 	if (monitor)
 		vlan_rtm_cur_ifidx = -1;
 
-	if (vlan_rtm_cur_ifidx == -1 || vlan_rtm_cur_ifidx != bvm->ifindex) {
-		if (vlan_rtm_cur_ifidx != -1)
-			close_vlan_port();
-		open_vlan_port(bvm->ifindex, VLAN_SHOW_VLAN);
-		vlan_rtm_cur_ifidx = bvm->ifindex;
-		newport = true;
+	if (vlan_rtm_cur_ifidx != -1) {
+		close_vlan_port();
+		vlan_rtm_cur_ifidx = -1;
 	}
 
 	rem = len;
@@ -708,10 +704,12 @@ int print_vlan_rtm(struct nlmsghdr *n, void *arg, bool monitor)
 			}
 		}
 		open_json_object(NULL);
-		if (!newport)
+		if (vlan_rtm_cur_ifidx != bvm->ifindex) {
+			open_vlan_port(bvm->ifindex, VLAN_SHOW_VLAN);
+			vlan_rtm_cur_ifidx = bvm->ifindex;
+		} else {
 			print_string(PRINT_FP, NULL, "%-" __stringify(IFNAMSIZ) "s  ", "");
-		else
-			newport = false;
+		}
 		print_range("vlan", vinfo->vid, vrange);
 		print_vlan_flags(vinfo->flags);
 		print_nl();
-- 
2.30.2