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freebsd-skq/sys/net/if_lagg.h
Mark Johnston c23df8eafa lagg: Further cleanup of the rr_limit option. 
Add an option flag so that arbitrary updates to a lagg's configuration
do not clear sc_stride.  Preseve compatibility for old ifconfig
binaries.  Update ifconfig to use the new flag and improve the casting
used when parsing the option parameter.

Modify the RR transmit function to avoid locklessly reading sc_stride
twice.  Ensure that sc_stride is always 1 or greater.

Reviewed by:	hselasky
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D23092
2020-01-09 14:58:41 +00:00

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/* $OpenBSD: if_trunk.h,v 1.11 2007/01/31 06:20:19 reyk Exp $ */
/*
* Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
*
* 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.
*
* $FreeBSD$
*/
#ifndef _NET_LAGG_H
#define _NET_LAGG_H
/*
* Global definitions
*/
#define LAGG_MAX_PORTS 32 /* logically */
#define LAGG_MAX_NAMESIZE 32 /* name of a protocol */
#define LAGG_MAX_STACKING 4 /* maximum number of stacked laggs */
/* Lagg flags */
#define LAGG_F_HASHL2 0x00000001 /* hash layer 2 */
#define LAGG_F_HASHL3 0x00000002 /* hash layer 3 */
#define LAGG_F_HASHL4 0x00000004 /* hash layer 4 */
#define LAGG_F_HASHMASK 0x00000007
/* Port flags */
#define LAGG_PORT_SLAVE 0x00000000 /* normal enslaved port */
#define LAGG_PORT_MASTER 0x00000001 /* primary port */
#define LAGG_PORT_STACK 0x00000002 /* stacked lagg port */
#define LAGG_PORT_ACTIVE 0x00000004 /* port is active */
#define LAGG_PORT_COLLECTING 0x00000008 /* port is receiving frames */
#define LAGG_PORT_DISTRIBUTING 0x00000010 /* port is sending frames */
#define LAGG_PORT_BITS "\20\01MASTER\02STACK\03ACTIVE\04COLLECTING" \
"\05DISTRIBUTING"
/* Supported lagg PROTOs */
typedef enum {
LAGG_PROTO_NONE = 0, /* no lagg protocol defined */
LAGG_PROTO_ROUNDROBIN, /* simple round robin */
LAGG_PROTO_FAILOVER, /* active failover */
LAGG_PROTO_LOADBALANCE, /* loadbalance */
LAGG_PROTO_LACP, /* 802.3ad lacp */
LAGG_PROTO_BROADCAST, /* broadcast */
LAGG_PROTO_MAX,
} lagg_proto;
struct lagg_protos {
const char *lpr_name;
lagg_proto lpr_proto;
};
#define LAGG_PROTO_DEFAULT LAGG_PROTO_FAILOVER
#define LAGG_PROTOS { \
{ "failover", LAGG_PROTO_FAILOVER }, \
{ "lacp", LAGG_PROTO_LACP }, \
{ "loadbalance", LAGG_PROTO_LOADBALANCE }, \
{ "roundrobin", LAGG_PROTO_ROUNDROBIN }, \
{ "broadcast", LAGG_PROTO_BROADCAST }, \
{ "none", LAGG_PROTO_NONE }, \
{ "default", LAGG_PROTO_DEFAULT } \
}
/*
* lagg ioctls.
*/
/*
* LACP current operational parameters structure.
*/
struct lacp_opreq {
uint16_t actor_prio;
uint8_t actor_mac[ETHER_ADDR_LEN];
uint16_t actor_key;
uint16_t actor_portprio;
uint16_t actor_portno;
uint8_t actor_state;
uint16_t partner_prio;
uint8_t partner_mac[ETHER_ADDR_LEN];
uint16_t partner_key;
uint16_t partner_portprio;
uint16_t partner_portno;
uint8_t partner_state;
};
/* lagg port settings */
struct lagg_reqport {
char rp_ifname[IFNAMSIZ]; /* name of the lagg */
char rp_portname[IFNAMSIZ]; /* name of the port */
u_int32_t rp_prio; /* port priority */
u_int32_t rp_flags; /* port flags */
union {
struct lacp_opreq rpsc_lacp;
} rp_psc;
#define rp_lacpreq rp_psc.rpsc_lacp
};
#define SIOCGLAGGPORT _IOWR('i', 140, struct lagg_reqport)
#define SIOCSLAGGPORT _IOW('i', 141, struct lagg_reqport)
#define SIOCSLAGGDELPORT _IOW('i', 142, struct lagg_reqport)
/* lagg, ports and options */
struct lagg_reqall {
char ra_ifname[IFNAMSIZ]; /* name of the lagg */
u_int ra_proto; /* lagg protocol */
size_t ra_size; /* size of buffer */
struct lagg_reqport *ra_port; /* allocated buffer */
int ra_ports; /* total port count */
union {
struct lacp_opreq rpsc_lacp;
} ra_psc;
#define ra_lacpreq ra_psc.rpsc_lacp
};
#define SIOCGLAGG _IOWR('i', 143, struct lagg_reqall)
#define SIOCSLAGG _IOW('i', 144, struct lagg_reqall)
struct lagg_reqflags {
char rf_ifname[IFNAMSIZ]; /* name of the lagg */
uint32_t rf_flags; /* lagg protocol */
};
#define SIOCGLAGGFLAGS _IOWR('i', 145, struct lagg_reqflags)
#define SIOCSLAGGHASH _IOW('i', 146, struct lagg_reqflags)
struct lagg_reqopts {
char ro_ifname[IFNAMSIZ]; /* name of the lagg */
int ro_opts; /* Option bitmap */
#define LAGG_OPT_NONE 0x00
#define LAGG_OPT_USE_FLOWID 0x01 /* enable use of flowid */
/* Pseudo flags which are used in ro_opts but not stored into sc_opts. */
#define LAGG_OPT_FLOWIDSHIFT 0x02 /* set flowid shift */
#define LAGG_OPT_USE_NUMA 0x04 /* enable use of numa */
#define LAGG_OPT_FLOWIDSHIFT_MASK 0x1f /* flowid is uint32_t */
#define LAGG_OPT_LACP_STRICT 0x10 /* LACP strict mode */
#define LAGG_OPT_LACP_TXTEST 0x20 /* LACP debug: txtest */
#define LAGG_OPT_LACP_RXTEST 0x40 /* LACP debug: rxtest */
#define LAGG_OPT_LACP_TIMEOUT 0x80 /* LACP timeout */
#define LAGG_OPT_RR_LIMIT 0x100 /* RR stride */
u_int ro_count; /* number of ports */
u_int ro_active; /* active port count */
u_int ro_flapping; /* number of flapping */
int ro_flowid_shift; /* shift the flowid */
uint32_t ro_bkt; /* stride for RR */
};
#define SIOCGLAGGOPTS _IOWR('i', 152, struct lagg_reqopts)
#define SIOCSLAGGOPTS _IOW('i', 153, struct lagg_reqopts)
#define LAGG_OPT_BITS "\020\001USE_FLOWID\003USE_NUMA" \
"\005LACP_STRICT\006LACP_TXTEST" \
"\007LACP_RXTEST"
#ifdef _KERNEL
/*
* Internal kernel part
*/
#define LAGG_PORTACTIVE(_tp) ( \
((_tp)->lp_ifp->if_link_state == LINK_STATE_UP) && \
((_tp)->lp_ifp->if_flags & IFF_UP) \
)
struct lagg_ifreq {
union {
struct ifreq ifreq;
struct {
char ifr_name[IFNAMSIZ];
struct sockaddr_storage ifr_ss;
} ifreq_storage;
} ifreq;
};
#define sc_ifflags sc_ifp->if_flags /* flags */
#define sc_ifname sc_ifp->if_xname /* name */
/* Private data used by the loadbalancing protocol */
struct lagg_lb {
u_int32_t lb_key;
struct lagg_port *lb_ports[LAGG_MAX_PORTS];
};
struct lagg_mc {
struct sockaddr_dl mc_addr;
struct ifmultiaddr *mc_ifma;
SLIST_ENTRY(lagg_mc) mc_entries;
};
struct lagg_counters {
uint64_t val[IFCOUNTERS];
};
struct lagg_softc {
struct ifnet *sc_ifp; /* virtual interface */
struct rmlock sc_mtx;
struct sx sc_sx;
int sc_proto; /* lagg protocol */
u_int sc_count; /* number of ports */
u_int sc_active; /* active port count */
u_int sc_flapping; /* number of flapping
* events */
struct lagg_port *sc_primary; /* primary port */
struct ifmedia sc_media; /* media config */
void *sc_psc; /* protocol data */
uint32_t sc_seq; /* sequence counter */
uint32_t sc_stride; /* stride for RR */
uint32_t sc_flags;
int sc_destroying; /* destroying lagg */
CK_SLIST_HEAD(__tplhd, lagg_port) sc_ports; /* list of interfaces */
SLIST_ENTRY(lagg_softc) sc_entries;
eventhandler_tag vlan_attach;
eventhandler_tag vlan_detach;
struct callout sc_callout;
u_int sc_opts;
int flowid_shift; /* shift the flowid */
struct lagg_counters detached_counters; /* detached ports sum */
};
struct lagg_port {
struct ifnet *lp_ifp; /* physical interface */
struct lagg_softc *lp_softc; /* parent lagg */
uint8_t lp_lladdr[ETHER_ADDR_LEN];
u_char lp_iftype; /* interface type */
uint32_t lp_prio; /* port priority */
uint32_t lp_flags; /* port flags */
int lp_ifflags; /* saved ifp flags */
int lp_ifcapenable; /* saved ifp capenable */
void *lh_cookie; /* if state hook */
void *lp_psc; /* protocol data */
int lp_detaching; /* ifnet is detaching */
SLIST_HEAD(__mclhd, lagg_mc) lp_mc_head; /* multicast addresses */
/* Redirected callbacks */
int (*lp_ioctl)(struct ifnet *, u_long, caddr_t);
int (*lp_output)(struct ifnet *, struct mbuf *,
const struct sockaddr *, struct route *);
struct lagg_counters port_counters; /* ifp counters copy */
CK_SLIST_ENTRY(lagg_port) lp_entries;
struct epoch_context lp_epoch_ctx;
};
extern struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *);
extern void (*lagg_linkstate_p)(struct ifnet *, int );
int lagg_enqueue(struct ifnet *, struct mbuf *);
SYSCTL_DECL(_net_link_lagg);
#endif /* _KERNEL */
#endif /* _NET_LAGG_H */
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