2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2013-2018 Universita` di Pisa
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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
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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
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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__ */
48 * The following bridge-related functions are used by other
51 * VALE only supports unicast or broadcast. The lookup
52 * function can return 0 .. NM_BDG_MAXPORTS-1 for regular ports,
53 * NM_BDG_MAXPORTS for broadcast, NM_BDG_MAXPORTS+1 to indicate
56 typedef uint32_t (*bdg_lookup_fn_t)(struct nm_bdg_fwd *ft, uint8_t *ring_nr,
57 struct netmap_vp_adapter *, void *private_data);
58 typedef int (*bdg_config_fn_t)(struct nm_ifreq *);
59 typedef void (*bdg_dtor_fn_t)(const struct netmap_vp_adapter *);
60 typedef void *(*bdg_update_private_data_fn_t)(void *private_data, void *callback_data, int *error);
61 typedef int (*bdg_vp_create_fn_t)(struct nmreq_header *hdr,
62 struct ifnet *ifp, struct netmap_mem_d *nmd,
63 struct netmap_vp_adapter **ret);
64 typedef int (*bdg_bwrap_attach_fn_t)(const char *nr_name, struct netmap_adapter *hwna);
65 struct netmap_bdg_ops {
66 bdg_lookup_fn_t lookup;
67 bdg_config_fn_t config;
69 bdg_vp_create_fn_t vp_create;
70 bdg_bwrap_attach_fn_t bwrap_attach;
73 int netmap_bwrap_attach(const char *name, struct netmap_adapter *, struct netmap_bdg_ops *);
74 int netmap_bdg_regops(const char *name, struct netmap_bdg_ops *bdg_ops, void *private_data, void *auth_token);
76 #define NM_BRIDGES 8 /* number of bridges */
77 #define NM_BDG_MAXPORTS 254 /* up to 254 */
78 #define NM_BDG_BROADCAST NM_BDG_MAXPORTS
79 #define NM_BDG_NOPORT (NM_BDG_MAXPORTS+1)
81 /* XXX Should go away after fixing find_bridge() - Michio */
82 #define NM_BDG_HASH 1024 /* forwarding table entries */
86 uint64_t mac; /* the top 2 bytes are the epoch */
90 /* Default size for the Maximum Frame Size. */
91 #define NM_BDG_MFS_DEFAULT 1514
94 * nm_bridge is a descriptor for a VALE switch.
95 * Interfaces for a bridge are all in bdg_ports[].
96 * The array has fixed size, an empty entry does not terminate
97 * the search, but lookups only occur on attach/detach so we
98 * don't mind if they are slow.
100 * The bridge is non blocking on the transmit ports: excess
101 * packets are dropped if there is no room on the output port.
103 * bdg_lock protects accesses to the bdg_ports array.
104 * This is a rw lock (or equivalent).
106 #define NM_BDG_IFNAMSIZ IFNAMSIZ
108 /* XXX what is the proper alignment/layout ? */
109 BDG_RWLOCK_T bdg_lock; /* protects bdg_ports */
111 uint32_t bdg_active_ports;
112 char bdg_basename[NM_BDG_IFNAMSIZ];
114 /* Indexes of active ports (up to active_ports)
115 * and all other remaining ports.
117 uint32_t bdg_port_index[NM_BDG_MAXPORTS];
118 /* used by netmap_bdg_detach_common() */
119 uint32_t tmp_bdg_port_index[NM_BDG_MAXPORTS];
121 struct netmap_vp_adapter *bdg_ports[NM_BDG_MAXPORTS];
124 * Programmable lookup functions to figure out the destination port.
125 * It returns either of an index of the destination port,
126 * NM_BDG_BROADCAST to broadcast this packet, or NM_BDG_NOPORT not to
127 * forward this packet. ring_nr is the source ring index, and the
128 * function may overwrite this value to forward this packet to a
129 * different ring index.
130 * The function is set by netmap_bdg_regops().
132 struct netmap_bdg_ops bdg_ops;
133 struct netmap_bdg_ops bdg_saved_ops;
136 * Contains the data structure used by the bdg_ops.lookup function.
137 * By default points to *ht which is allocated on attach and used by the default lookup
138 * otherwise will point to the data structure received by netmap_bdg_regops().
141 struct nm_hash_ent *ht;
143 /* Currently used to specify if the bridge is still in use while empty and
144 * if it has been put in exclusive mode by an external module, see netmap_bdg_regops()
145 * and netmap_bdg_create().
147 #define NM_BDG_ACTIVE 1
148 #define NM_BDG_EXCLUSIVE 2
149 #define NM_BDG_NEED_BWRAP 4
155 #endif /* CONFIG_NET_NS */
159 nm_bdg_get_auth_token(struct nm_bridge *b)
164 /* bridge not in exclusive mode ==> always valid
165 * bridge in exclusive mode (created through netmap_bdg_create()) ==> check authentication token
168 nm_bdg_valid_auth_token(struct nm_bridge *b, void *auth_token)
170 return !(b->bdg_flags & NM_BDG_EXCLUSIVE) || b->ht == auth_token;
173 int netmap_get_bdg_na(struct nmreq_header *hdr, struct netmap_adapter **na,
174 struct netmap_mem_d *nmd, int create, struct netmap_bdg_ops *ops);
176 struct nm_bridge *nm_find_bridge(const char *name, int create, struct netmap_bdg_ops *ops);
177 int netmap_bdg_free(struct nm_bridge *b);
178 void netmap_bdg_detach_common(struct nm_bridge *b, int hw, int sw);
179 int netmap_vp_bdg_ctl(struct nmreq_header *hdr, struct netmap_adapter *na);
180 int netmap_bwrap_reg(struct netmap_adapter *, int onoff);
181 int netmap_vp_reg(struct netmap_adapter *na, int onoff);
182 int netmap_vp_rxsync(struct netmap_kring *kring, int flags);
183 int netmap_bwrap_notify(struct netmap_kring *kring, int flags);
184 int netmap_bwrap_attach_common(struct netmap_adapter *na,
185 struct netmap_adapter *hwna);
186 int netmap_bwrap_krings_create_common(struct netmap_adapter *na);
187 void netmap_bwrap_krings_delete_common(struct netmap_adapter *na);
188 struct nm_bridge *netmap_init_bridges2(u_int);
189 void netmap_uninit_bridges2(struct nm_bridge *, u_int);
190 int netmap_bdg_update_private_data(const char *name, bdg_update_private_data_fn_t callback,
191 void *callback_data, void *auth_token);
192 int netmap_bdg_config(struct nm_ifreq *nifr);
193 int nm_is_bwrap(struct netmap_adapter *);
195 #define NM_NEED_BWRAP (-2)
196 #endif /* _NET_NETMAP_BDG_H_ */