1 files changed, 128 insertions, 0 deletions

diff --git a/sys/dev/netmap/netmap_bdg.h b/sys/dev/netmap/netmap_bdg.h
new file mode 100644
index 000000000000..4f02c9e4cdf9
--- /dev/null
+++ b/sys/dev/netmap/netmap_bdg.h
@@ -0,0 +1,128 @@
+#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__ */
+
+/* $FreeBSD$ */
+
+/* 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;
+
+	/*
+	 * 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
+	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_vp_reg(struct netmap_adapter *na, int onoff);
+int netmap_bwrap_reg(struct netmap_adapter *, int onoff);
+int netmap_vp_reg(struct netmap_adapter *na, int onoff);
+int netmap_vp_rxsync(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);
+#define NM_NEED_BWRAP (-2)
+#endif /* _NET_NETMAP_BDG_H_ */
+