initial import of a trunking (link aggregation and link failover)

implementation. it currently supports round robin mode with link state
checking, additional modes will be added later.

ok brad@, deraadt@

1 files changed, 131 insertions, 0 deletions

diff --git a/sys/net/if_trunk.h b/sys/net/if_trunk.h
new file mode 100644
index 00000000000..42c6d5fa264
--- /dev/null
+++ b/sys/net/if_trunk.h
@@ -0,0 +1,131 @@
+/*	$OpenBSD: if_trunk.h,v 1.1 2005/05/24 02:45:17 reyk Exp $	*/
+
+/*
+ * Copyright (c) 2005 Reyk Floeter <reyk@vantronix.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _NET_TRUNK_H
+#define _NET_TRUNK_H
+
+/*
+ * Global definitions
+ */
+
+#define TRUNK_MAX_PORTS		32	/* logically */
+#define TRUNK_MAX_NAMESIZE	32	/* name of a protocol */
+
+/* Port flags */
+#define TRUNK_PORT_SLAVE	0x00000000	/* normal enslaved port */
+#define TRUNK_PORT_MASTER	0x00000001	/* primary port */
+#define TRUNK_PORT_GLOBAL	0x80000000	/* IOCTL: global flag */
+#define TRUNK_PORT_BITS		"\20\01MASTER"
+
+/* Supported trunk PROTOs */
+enum trunk_proto {
+	TRUNK_PROTO_NONE	= 0,		/* no trunk protocol defined */
+	TRUNK_PROTO_ROUNDROBIN	= 1,		/* simple round robin */
+	TRUNK_PROTO_MAX		= 3,
+};
+
+struct trunk_protos {
+	const char		*tpr_name;
+	enum trunk_proto	tpr_proto;
+};
+
+#define	TRUNK_PROTO_DEFAULT	TRUNK_PROTO_ROUNDROBIN
+#define TRUNK_PROTOS	{						\
+	{ "roundrobin",	TRUNK_PROTO_ROUNDROBIN },			\
+	{ "none",	TRUNK_PROTO_NONE },				\
+	{ "default",	TRUNK_PROTO_DEFAULT }				\
+}
+
+/*
+ * Trunk ioctls.
+ */
+
+/* Trunk port settings */
+struct trunk_reqport {
+	char			rp_ifname[IFNAMSIZ];	/* name of the trunk */
+	char			rp_portname[IFNAMSIZ];	/* name of the port */
+	u_int32_t		rp_flags;		/* port flags */
+};
+
+#define SIOCGTRUNKPORT		_IOWR('i', 140, struct trunk_reqport)
+#define SIOCSTRUNKPORT		 _IOW('i', 141, struct trunk_reqport)
+#define SIOCSTRUNKDELPORT	 _IOW('i', 142, struct trunk_reqport)
+
+/* Trunk, ports and options */
+struct trunk_reqall {
+	char			ra_ifname[IFNAMSIZ];	/* name of the trunk */
+	u_int			ra_proto;		/* trunk protocol */
+
+	size_t			ra_size;		/* size of buffer */
+	struct trunk_reqport	*ra_port;		/* allocated buffer */
+	int			ra_ports;		/* total port count */
+};
+
+#define SIOCGTRUNK		_IOWR('i', 143, struct trunk_reqall)
+#define SIOCSTRUNK		 _IOW('i', 144, struct trunk_reqall)
+
+#ifdef _KERNEL
+/*
+ * Internal kernel part
+ */
+
+struct trunk_port {
+	struct ifnet			*tp_if;		/* physical interface */
+	caddr_t				tp_trunk;	/* parent trunk */
+
+	u_char				tp_iftype;	/* interface type */
+	u_int32_t			tp_flags;	/* port flags */
+
+	/* Redirected callbacks */
+	void	(*tp_watchdog)(struct ifnet *);
+	int	(*tp_ioctl)(struct ifnet *, u_long, caddr_t);
+
+	SLIST_ENTRY(trunk_port)		tp_entries;
+};
+
+#define tp_ifname		tp_if->if_xname		/* interface name */
+#define tp_link_state		tp_if->if_link_state	/* link state */
+
+struct trunk_softc {
+	struct arpcom			tr_ac;		/* virtual interface */
+	int				tr_unit;	/* trunk unit */
+	enum trunk_proto		tr_proto;	/* trunk protocol */
+	u_int				tr_count;	/* number of ports */
+	struct trunk_port		*tr_primary;	/* primary port */
+	struct ifmedia			tr_media;	/* media config */
+	caddr_t				tr_psc;		/* protocol data */
+
+	SLIST_HEAD(__tplhd, trunk_port)	tr_ports;	/* list of interfaces */
+	SLIST_ENTRY(trunk_softc)	tr_entries;
+
+	/* Trunk protocol callbacks */
+	int	(*tr_detach)(struct trunk_softc *);
+	int	(*tr_start)(struct trunk_softc *, struct mbuf *);
+	int	(*tr_watchdog)(struct trunk_softc *);
+	int	(*tr_input)(struct trunk_softc *, struct trunk_port *,
+		    struct ether_header *, struct mbuf *);
+};
+
+#define tr_ifflags		tr_ac.ac_if.if_flags	/* interface flags */
+#define tr_ifname		tr_ac.ac_if.if_xname	/* interface name */
+
+void	 trunk_port_ifdetach(struct ifnet *);
+int	 trunk_input(struct ifnet *, struct ether_header *, struct mbuf *);
+#endif /* _KERNEL */
+
+#endif /* _NET_TRUNK_H */