Differential D17364 Diff 48604 sys/dev/netmap/netmap_bdg.h

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sys/dev/netmap/netmap_bdg.h

				#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__ */

				/* 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_ */