2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2013-2018 Universita` di Pisa
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #ifndef _NET_NETMAP_BDG_H_
31 #define _NET_NETMAP_BDG_H_
33 #if defined(__FreeBSD__)
34 #define BDG_RWLOCK_T struct rwlock // struct rwlock
36 #define BDG_RWINIT(b) \
37 rw_init_flags(&(b)->bdg_lock, "bdg lock", RW_NOWITNESS)
38 #define BDG_WLOCK(b) rw_wlock(&(b)->bdg_lock)
39 #define BDG_WUNLOCK(b) rw_wunlock(&(b)->bdg_lock)
40 #define BDG_RLOCK(b) rw_rlock(&(b)->bdg_lock)
41 #define BDG_RTRYLOCK(b) rw_try_rlock(&(b)->bdg_lock)
42 #define BDG_RUNLOCK(b) rw_runlock(&(b)->bdg_lock)
43 #define BDG_RWDESTROY(b) rw_destroy(&(b)->bdg_lock)
45 #endif /* __FreeBSD__ */
47 /* XXX Should go away after fixing find_bridge() - Michio */
48 #define NM_BDG_HASH 1024 /* forwarding table entries */
52 uint64_t mac; /* the top 2 bytes are the epoch */
56 /* Default size for the Maximum Frame Size. */
57 #define NM_BDG_MFS_DEFAULT 1514
60 * nm_bridge is a descriptor for a VALE switch.
61 * Interfaces for a bridge are all in bdg_ports[].
62 * The array has fixed size, an empty entry does not terminate
63 * the search, but lookups only occur on attach/detach so we
64 * don't mind if they are slow.
66 * The bridge is non blocking on the transmit ports: excess
67 * packets are dropped if there is no room on the output port.
69 * bdg_lock protects accesses to the bdg_ports array.
70 * This is a rw lock (or equivalent).
72 #define NM_BDG_IFNAMSIZ IFNAMSIZ
74 /* XXX what is the proper alignment/layout ? */
75 BDG_RWLOCK_T bdg_lock; /* protects bdg_ports */
77 uint32_t bdg_active_ports;
78 char bdg_basename[NM_BDG_IFNAMSIZ];
80 /* Indexes of active ports (up to active_ports)
81 * and all other remaining ports.
83 uint32_t bdg_port_index[NM_BDG_MAXPORTS];
84 /* used by netmap_bdg_detach_common() */
85 uint32_t tmp_bdg_port_index[NM_BDG_MAXPORTS];
87 struct netmap_vp_adapter *bdg_ports[NM_BDG_MAXPORTS];
90 * Programmable lookup functions to figure out the destination port.
91 * It returns either of an index of the destination port,
92 * NM_BDG_BROADCAST to broadcast this packet, or NM_BDG_NOPORT not to
93 * forward this packet. ring_nr is the source ring index, and the
94 * function may overwrite this value to forward this packet to a
95 * different ring index.
96 * The function is set by netmap_bdg_regops().
98 struct netmap_bdg_ops *bdg_ops;
101 * Contains the data structure used by the bdg_ops.lookup function.
102 * By default points to *ht which is allocated on attach and used by the default lookup
103 * otherwise will point to the data structure received by netmap_bdg_regops().
106 struct nm_hash_ent *ht;
108 /* Currently used to specify if the bridge is still in use while empty and
109 * if it has been put in exclusive mode by an external module, see netmap_bdg_regops()
110 * and netmap_bdg_create().
112 #define NM_BDG_ACTIVE 1
113 #define NM_BDG_EXCLUSIVE 2
119 #endif /* CONFIG_NET_NS */
123 nm_bdg_get_auth_token(struct nm_bridge *b)
128 /* bridge not in exclusive mode ==> always valid
129 * bridge in exclusive mode (created through netmap_bdg_create()) ==> check authentication token
132 nm_bdg_valid_auth_token(struct nm_bridge *b, void *auth_token)
134 return !(b->bdg_flags & NM_BDG_EXCLUSIVE) || b->ht == auth_token;
137 int netmap_get_bdg_na(struct nmreq_header *hdr, struct netmap_adapter **na,
138 struct netmap_mem_d *nmd, int create, struct netmap_bdg_ops *ops);
140 struct nm_bridge *nm_find_bridge(const char *name, int create, struct netmap_bdg_ops *ops);
141 int netmap_bdg_free(struct nm_bridge *b);
142 void netmap_bdg_detach_common(struct nm_bridge *b, int hw, int sw);
143 int netmap_vp_bdg_ctl(struct nmreq_header *hdr, struct netmap_adapter *na);
144 int netmap_bwrap_reg(struct netmap_adapter *, int onoff);
145 int netmap_vp_reg(struct netmap_adapter *na, int onoff);
146 int netmap_vp_rxsync(struct netmap_kring *kring, int flags);
147 int netmap_bwrap_notify(struct netmap_kring *kring, int flags);
148 int netmap_bwrap_attach_common(struct netmap_adapter *na,
149 struct netmap_adapter *hwna);
150 int netmap_bwrap_krings_create_common(struct netmap_adapter *na);
151 void netmap_bwrap_krings_delete_common(struct netmap_adapter *na);
152 #define NM_NEED_BWRAP (-2)
153 #endif /* _NET_NETMAP_BDG_H_ */