D30839.diff
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	diff --git a/sbin/devd/devd.conf.5 b/sbin/devd/devd.conf.5
	--- a/sbin/devd/devd.conf.5
	+++ b/sbin/devd/devd.conf.5
	@@ -40,7 +40,7 @@
	.\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
	.\" SOFTWARE.
	.\"
	-.Dd October 12, 2020
	+.Dd June 23, 2021
	.Dt DEVD.CONF 5
	.Os
	.Sh NAME
	@@ -467,6 +467,8 @@
	The network interface is attached to the system.
	.It Li IFNET Ta Em inet Ta Li DETACH Ta
	The network interface is detached from the system.
	+.It Li IFNET Ta Em inet Ta Li RENAME Ta
	+The network interface is renamed.
	.El
	.Pp
	.Bl -column "System" "Subsystem" "1234567" -compact
	diff --git a/sys/net/if.c b/sys/net/if.c
	--- a/sys/net/if.c
	+++ b/sys/net/if.c
	@@ -2468,6 +2468,7 @@
	size_t descrlen;
	char descrbuf, odescrbuf;
	char new_name[IFNAMSIZ];
	+ char old_name[IFNAMSIZ], strbuf[IFNAMSIZ + 8];
	struct ifaddr *ifa;
	struct sockaddr_dl *sdl;

	@@ -2673,6 +2674,7 @@
	if_printf(ifp, "changing name to '%s'\n", new_name);

	IF_ADDR_WLOCK(ifp);
	+ strlcpy(old_name, ifp->if_xname, sizeof(old_name));
	strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
	ifa = ifp->if_addr;
	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
	@@ -2700,6 +2702,9 @@
	rt_ifannouncemsg(ifp, IFAN_ARRIVAL);

	ifp->if_flags &= ~IFF_RENAMING;
	+
	+ snprintf(strbuf, sizeof(strbuf), "name=%s", new_name);
	+ devctl_notify("IFNET", old_name, "RENAME", strbuf);
	break;

	#ifdef VIMAGE