git: 21a75a85f0e0 - main - netlink: Indicate that ifinfomsg uses IFT_* types

The branch main has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=21a75a85f0e0cc328b6e9b437d783ef0c25dc52e

commit 21a75a85f0e0cc328b6e9b437d783ef0c25dc52e
Author:     Ed Maste <emaste@FreeBSD.org>
AuthorDate: 2026-05-29 16:23:17 +0000
Commit:     Ed Maste <emaste@FreeBSD.org>
CommitDate: 2026-06-15 12:36:16 +0000

    netlink: Indicate that ifinfomsg uses IFT_* types
    
    On Linux struct ifinfomsg uses ARPHRD_* values, while we used IFT_*
    types (which derive from SNMP ifType definitions in RFC 1573).
    Update the header to reflect this.
    
    PR:             272144
    Reviewed by:    pouria
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D57334
---
 share/man/man4/rtnetlink.4    | 17 +++++++++++++++--
 sys/netlink/route/interface.h |  4 ++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/share/man/man4/rtnetlink.4 b/share/man/man4/rtnetlink.4
index 2161db157234..d756cd031145 100644
--- a/share/man/man4/rtnetlink.4
+++ b/share/man/man4/rtnetlink.4
@@ -22,7 +22,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd May 15, 2026
+.Dd June 15, 2026
 .Dt RTNETLINK 4
 .Os
 .Sh NAME
@@ -275,12 +275,25 @@ All interface configuration messages share the common header:
 struct ifinfomsg {
 	unsigned char	ifi_family;	/* not used, set to 0 */
 	unsigned char	__ifi_pad;
-	unsigned short	ifi_type;	/* ARPHRD_* */
+	unsigned short	ifi_type;	/* IFT_* */
 	int		ifi_index;	/* Interface index */
 	unsigned	ifi_flags;	/* IFF_* flags */
 	unsigned	ifi_change;	/* IFF_* change mask */
 };
 .Ed
+.Pp
+.Sy Note :
+On
+.Fx
+the
+.Va ifi_type
+field uses
+.Dv IFT_*
+constants from
+.In net/if_types.h
+rather than
+.Dv ARPHRD_*
+as on Linux.
 .Ss RTM_NEWLINK
 Creates a new interface.
 The only mandatory TLV is
diff --git a/sys/netlink/route/interface.h b/sys/netlink/route/interface.h
index 0bd06ff1f6d5..e6aef3d702d8 100644
--- a/sys/netlink/route/interface.h
+++ b/sys/netlink/route/interface.h
@@ -36,8 +36,8 @@
 struct ifinfomsg {
 	unsigned char	ifi_family;	/* not used */
 	unsigned char	__ifi_pad;
-	unsigned short	ifi_type;	/* ARPHRD_* */
-	int		ifi_index;	/* Inteface index */
+	unsigned short	ifi_type;	/* IFT_* (net/if_types.h) */
+	int		ifi_index;	/* Interface index */
 	unsigned	ifi_flags;	/* IFF_* flags */
 	unsigned	ifi_change;	/* IFF_* change mask */
 };