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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (C) 2013-2018 Universita` di Pisa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NET_NETMAP_BDG_H_
#define _NET_NETMAP_BDG_H_
#if defined(__FreeBSD__)
#define BDG_RWLOCK_T struct rwlock // struct rwlock
#define BDG_RWINIT(b) \
rw_init_flags(&(b)->bdg_lock, "bdg lock", RW_NOWITNESS)
#define BDG_WLOCK(b) rw_wlock(&(b)->bdg_lock)
#define BDG_WUNLOCK(b) rw_wunlock(&(b)->bdg_lock)
#define BDG_RLOCK(b) rw_rlock(&(b)->bdg_lock)
#define BDG_RTRYLOCK(b) rw_try_rlock(&(b)->bdg_lock)
#define BDG_RUNLOCK(b) rw_runlock(&(b)->bdg_lock)
#define BDG_RWDESTROY(b) rw_destroy(&(b)->bdg_lock)
#endif /* __FreeBSD__ */
/*
* The following bridge-related functions are used by other
* kernel modules.
*
* VALE only supports unicast or broadcast. The lookup
* function can return 0 .. NM_BDG_MAXPORTS-1 for regular ports,
* NM_BDG_MAXPORTS for broadcast, NM_BDG_MAXPORTS+1 to indicate
* drop.
*/
typedef uint32_t (*bdg_lookup_fn_t)(struct nm_bdg_fwd *ft, uint8_t *ring_nr,
struct netmap_vp_adapter *, void *private_data);
typedef int (*bdg_config_fn_t)(struct nm_ifreq *);
typedef void (*bdg_dtor_fn_t)(const struct netmap_vp_adapter *);
typedef void *(*bdg_update_private_data_fn_t)(void *private_data, void *callback_data, int *error);
typedef int (*bdg_vp_create_fn_t)(struct nmreq_header *hdr,
if_t ifp, struct netmap_mem_d *nmd,
struct netmap_vp_adapter **ret);
typedef int (*bdg_bwrap_attach_fn_t)(const char *nr_name, struct netmap_adapter *hwna);
struct netmap_bdg_ops {
bdg_lookup_fn_t lookup;
bdg_config_fn_t config;
bdg_dtor_fn_t dtor;
bdg_vp_create_fn_t vp_create;
bdg_bwrap_attach_fn_t bwrap_attach;
char name[IFNAMSIZ];
};
int netmap_bwrap_attach(const char *name, struct netmap_adapter *, struct netmap_bdg_ops *);
int netmap_bdg_regops(const char *name, struct netmap_bdg_ops *bdg_ops, void *private_data, void *auth_token);
#define NM_BRIDGES 8 /* number of bridges */
#define NM_BDG_MAXPORTS 254 /* up to 254 */
#define NM_BDG_BROADCAST NM_BDG_MAXPORTS
#define NM_BDG_NOPORT (NM_BDG_MAXPORTS+1)
/* XXX Should go away after fixing find_bridge() - Michio */
#define NM_BDG_HASH 1024 /* forwarding table entries */
/* XXX revise this */
struct nm_hash_ent {
uint64_t mac; /* the top 2 bytes are the epoch */
uint64_t ports;
};
/* Default size for the Maximum Frame Size. */
#define NM_BDG_MFS_DEFAULT 1514
/*
* nm_bridge is a descriptor for a VALE switch.
* Interfaces for a bridge are all in bdg_ports[].
* The array has fixed size, an empty entry does not terminate
* the search, but lookups only occur on attach/detach so we
* don't mind if they are slow.
*
* The bridge is non blocking on the transmit ports: excess
* packets are dropped if there is no room on the output port.
*
* bdg_lock protects accesses to the bdg_ports array.
* This is a rw lock (or equivalent).
*/
#define NM_BDG_IFNAMSIZ IFNAMSIZ
struct nm_bridge {
/* XXX what is the proper alignment/layout ? */
BDG_RWLOCK_T bdg_lock; /* protects bdg_ports */
int bdg_namelen;
uint32_t bdg_active_ports;
char bdg_basename[NM_BDG_IFNAMSIZ];
/* Indexes of active ports (up to active_ports)
* and all other remaining ports.
*/
uint32_t bdg_port_index[NM_BDG_MAXPORTS];
/* used by netmap_bdg_detach_common() */
uint32_t tmp_bdg_port_index[NM_BDG_MAXPORTS];
struct netmap_vp_adapter *bdg_ports[NM_BDG_MAXPORTS];
/*
* Programmable lookup functions to figure out the destination port.
* It returns either of an index of the destination port,
* NM_BDG_BROADCAST to broadcast this packet, or NM_BDG_NOPORT not to
* forward this packet. ring_nr is the source ring index, and the
* function may overwrite this value to forward this packet to a
* different ring index.
* The function is set by netmap_bdg_regops().
*/
struct netmap_bdg_ops bdg_ops;
struct netmap_bdg_ops bdg_saved_ops;
/*
* Contains the data structure used by the bdg_ops.lookup function.
* By default points to *ht which is allocated on attach and used by the default lookup
* otherwise will point to the data structure received by netmap_bdg_regops().
*/
void *private_data;
struct nm_hash_ent *ht;
/* Currently used to specify if the bridge is still in use while empty and
* if it has been put in exclusive mode by an external module, see netmap_bdg_regops()
* and netmap_bdg_create().
*/
#define NM_BDG_ACTIVE 1
#define NM_BDG_EXCLUSIVE 2
#define NM_BDG_NEED_BWRAP 4
uint8_t bdg_flags;
#ifdef CONFIG_NET_NS
struct net *ns;
#endif /* CONFIG_NET_NS */
};
static inline void *
nm_bdg_get_auth_token(struct nm_bridge *b)
{
return b->ht;
}
/* bridge not in exclusive mode ==> always valid
* bridge in exclusive mode (created through netmap_bdg_create()) ==> check authentication token
*/
static inline int
nm_bdg_valid_auth_token(struct nm_bridge *b, void *auth_token)
{
return !(b->bdg_flags & NM_BDG_EXCLUSIVE) || b->ht == auth_token;
}
int netmap_get_bdg_na(struct nmreq_header *hdr, struct netmap_adapter **na,
struct netmap_mem_d *nmd, int create, struct netmap_bdg_ops *ops);
struct nm_bridge *nm_find_bridge(const char *name, int create, struct netmap_bdg_ops *ops);
int netmap_bdg_free(struct nm_bridge *b);
void netmap_bdg_detach_common(struct nm_bridge *b, int hw, int sw);
int netmap_vp_bdg_ctl(struct nmreq_header *hdr, struct netmap_adapter *na);
int netmap_bwrap_reg(struct netmap_adapter *, int onoff);
int netmap_bdg_detach_locked(struct nmreq_header *hdr, void *auth_token);
int netmap_vp_reg(struct netmap_adapter *na, int onoff);
int netmap_vp_rxsync(struct netmap_kring *kring, int flags);
int netmap_bwrap_intr_notify(struct netmap_kring *kring, int flags);
int netmap_bwrap_notify(struct netmap_kring *kring, int flags);
int netmap_bwrap_attach_common(struct netmap_adapter *na,
struct netmap_adapter *hwna);
int netmap_bwrap_krings_create_common(struct netmap_adapter *na);
void netmap_bwrap_krings_delete_common(struct netmap_adapter *na);
struct nm_bridge *netmap_init_bridges2(u_int);
void netmap_uninit_bridges2(struct nm_bridge *, u_int);
int netmap_bdg_update_private_data(const char *name, bdg_update_private_data_fn_t callback,
void *callback_data, void *auth_token);
int netmap_bdg_config(struct nm_ifreq *nifr);
#define NM_NEED_BWRAP (-2)
#endif /* _NET_NETMAP_BDG_H_ */
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