linux-kernel - [PATCH iproute2-next 1/1] bridge: link: Add command to set port in locked mode

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Date:   Fri, 25 Feb 2022 12:44:57 +0100
From:   Hans Schultz <schultz.hans@...il.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org,
        Hans Schultz <schultz.hans+netdev@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH iproute2-next 1/1] bridge: link: Add command to set port in locked mode

Add support for setting a bridge port in locked mode to use with 802.1X,
so that only authorized clients are allowed access through the port.

Syntax: bridge link set dev DEV locked {on, off}

Signed-off-by: Hans Schultz <schultz.hans+netdev@...il.com>
---
 bridge/link.c                | 13 +++++++++++++
 include/uapi/linux/if_link.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/bridge/link.c b/bridge/link.c
index 205a2fe7..bb4f0b2d 100644
--- a/bridge/link.c
+++ b/bridge/link.c
@@ -175,6 +175,9 @@ static void print_protinfo(FILE *fp, struct rtattr *attr)
 		if (prtb[IFLA_BRPORT_ISOLATED])
 			print_on_off(PRINT_ANY, "isolated", "isolated %s ",
 				     rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED]));
+		if (prtb[IFLA_BRPORT_LOCKED])
+			print_on_off(PRINT_ANY, "locked", "locked %s ",
+				     rta_getattr_u8(prtb[IFLA_BRPORT_LOCKED]));
 	} else
 		print_stp_state(rta_getattr_u8(attr));
 }
@@ -275,6 +278,7 @@ static void usage(void)
 		"                               [ neigh_suppress {on | off} ]\n"
 		"                               [ vlan_tunnel {on | off} ]\n"
 		"                               [ isolated {on | off} ]\n"
+		"                               [ locked {on | off} ]\n"
 		"                               [ hwmode {vepa | veb} ]\n"
 		"                               [ backup_port DEVICE ] [ nobackup_port ]\n"
 		"                               [ self ] [ master ]\n"
@@ -303,6 +307,7 @@ static int brlink_modify(int argc, char **argv)
 	__s8 vlan_tunnel = -1;
 	__s8 mcast_flood = -1;
 	__s8 mcast_to_unicast = -1;
+	__s8 locked = -1;
 	__s8 isolated = -1;
 	__s8 hairpin = -1;
 	__s8 bpdu_guard = -1;
@@ -415,6 +420,11 @@ static int brlink_modify(int argc, char **argv)
 			isolated = parse_on_off("isolated", *argv, &ret);
 			if (ret)
 				return ret;
+		} else if (strcmp(*argv, "locked") == 0) {
+			NEXT_ARG();
+			locked = parse_on_off("locked", *argv, &ret);
+			if (ret)
+				return ret;
 		} else if (strcmp(*argv, "backup_port") == 0) {
 			NEXT_ARG();
 			backup_port_idx = ll_name_to_index(*argv);
@@ -489,6 +499,9 @@ static int brlink_modify(int argc, char **argv)
 	if (isolated != -1)
 		addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated);
 
+	if (locked >= 0)
+		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LOCKED, locked);
+
 	if (backup_port_idx != -1)
 		addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT,
 			  backup_port_idx);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 1d4ed60b..637623bb 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -534,6 +534,7 @@ enum {
 	IFLA_BRPORT_MRP_IN_OPEN,
 	IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
 	IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
+	IFLA_BRPORT_LOCKED,
 	__IFLA_BRPORT_MAX
 };
 #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
-- 
2.30.2