X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev.h;h=7cb3c8031842af9b9eb34759d20eada1858b2a82;hb=3e912ffcbb;hp=7680156a3ec40af06e7a2beff45dd17bdb426cfa;hpb=275707c33f8f5463154bc3e2f561181a2060ab57;p=sliver-openvswitch.git diff --git a/lib/netdev.h b/lib/netdev.h index 7680156a3..7cb3c8031 100644 --- a/lib/netdev.h +++ b/lib/netdev.h @@ -26,24 +26,49 @@ extern "C" { #endif -/* Generic interface to network devices. +/* Generic interface to network devices ("netdev"s). * - * Currently, there is a single implementation of this interface that supports - * Linux. The interface should be generic enough to be implementable on other - * operating systems as well. */ + * Every port on a switch must have a corresponding netdev that must minimally + * support a few operations, such as the ability to read the netdev's MTU. + * The PORTING file at the top of the source tree has more information in the + * "Writing a netdev Provider" section. + * + * Thread-safety + * ============= + * + * Most of the netdev functions are fully thread-safe: they may be called from + * any number of threads on the same or different netdev objects. The + * exceptions are: + * + * netdev_rxq_recv() + * netdev_rxq_wait() + * netdev_rxq_drain() + * + * These functions are conditionally thread-safe: they may be called from + * different threads only on different netdev_rxq objects. (The client may + * create multiple netdev_rxq objects for a single netdev and access each + * of those from a different thread.) + * + * NETDEV_FOR_EACH_QUEUE + * netdev_queue_dump_next() + * netdev_queue_dump_done() + * + * These functions are conditionally thread-safe: they may be called from + * different threads only on different netdev_queue_dump objects. (The + * client may create multiple netdev_queue_dump objects for a single + * netdev and access each of those from a different thread.) + */ +struct netdev; +struct netdev_class; +struct netdev_rxq; +struct netdev_saved_flags; struct ofpbuf; struct in_addr; struct in6_addr; struct smap; struct sset; -enum netdev_flags { - NETDEV_UP = 0x0001, /* Device enabled? */ - NETDEV_PROMISC = 0x0002, /* Promiscuous mode? */ - NETDEV_LOOPBACK = 0x0004 /* This is a loopback device. */ -}; - /* Network device statistics. * * Values of unsupported statistics are set to all-1-bits (UINT64_MAX). */ @@ -75,41 +100,77 @@ struct netdev_stats { uint64_t tx_window_errors; }; -struct netdev; -struct netdev_class; +/* Configuration specific to tunnels. */ +struct netdev_tunnel_config { + bool in_key_present; + bool in_key_flow; + ovs_be64 in_key; + + bool out_key_present; + bool out_key_flow; + ovs_be64 out_key; + + ovs_be16 dst_port; + + bool ip_src_flow; + bool ip_dst_flow; + ovs_be32 ip_src; + ovs_be32 ip_dst; + + uint8_t ttl; + bool ttl_inherit; + + uint8_t tos; + bool tos_inherit; + + bool csum; + bool ipsec; + bool dont_fragment; +}; void netdev_run(void); void netdev_wait(void); void netdev_enumerate_types(struct sset *types); +bool netdev_is_reserved_name(const char *name); + +int netdev_n_rxq(const struct netdev *netdev); +bool netdev_is_pmd(const struct netdev *netdev); /* Open and close. */ -int netdev_open(const char *name, const char *type, struct netdev **); -void netdev_close(struct netdev *); +int netdev_open(const char *name, const char *type, struct netdev **netdevp); -bool netdev_exists(const char *name); -bool netdev_is_open(const char *name); +struct netdev *netdev_ref(const struct netdev *); +void netdev_close(struct netdev *); void netdev_parse_name(const char *netdev_name, char **name, char **type); /* Options. */ int netdev_set_config(struct netdev *, const struct smap *args); int netdev_get_config(const struct netdev *, struct smap *); +const struct netdev_tunnel_config * + netdev_get_tunnel_config(const struct netdev *); /* Basic properties. */ const char *netdev_get_name(const struct netdev *); const char *netdev_get_type(const struct netdev *); +const char *netdev_get_type_from_name(const char *); int netdev_get_mtu(const struct netdev *, int *mtup); int netdev_set_mtu(const struct netdev *, int mtu); int netdev_get_ifindex(const struct netdev *); -/* Packet send and receive. */ -int netdev_listen(struct netdev *); -int netdev_recv(struct netdev *, struct ofpbuf *); -void netdev_recv_wait(struct netdev *); -int netdev_drain(struct netdev *); +/* Packet reception. */ +int netdev_rxq_open(struct netdev *, struct netdev_rxq **, int id); +void netdev_rxq_close(struct netdev_rxq *); + +const char *netdev_rxq_get_name(const struct netdev_rxq *); -int netdev_send(struct netdev *, const struct ofpbuf *); +int netdev_rxq_recv(struct netdev_rxq *rx, struct ofpbuf **buffers, int *cnt); +void netdev_rxq_wait(struct netdev_rxq *); +int netdev_rxq_drain(struct netdev_rxq *); + +/* Packet transmission. */ +int netdev_send(struct netdev *, struct ofpbuf *, bool may_steal); void netdev_send_wait(struct netdev *); /* Hardware address. */ @@ -151,6 +212,23 @@ uint64_t netdev_features_to_bps(enum netdev_features features, bool netdev_features_is_full_duplex(enum netdev_features features); int netdev_set_advertisements(struct netdev *, enum netdev_features advertise); +/* Flags. */ +enum netdev_flags { + NETDEV_UP = 0x0001, /* Device enabled? */ + NETDEV_PROMISC = 0x0002, /* Promiscuous mode? */ + NETDEV_LOOPBACK = 0x0004 /* This is a loopback device. */ +}; + +int netdev_get_flags(const struct netdev *, enum netdev_flags *); +int netdev_set_flags(struct netdev *, enum netdev_flags, + struct netdev_saved_flags **); +int netdev_turn_flags_on(struct netdev *, enum netdev_flags, + struct netdev_saved_flags **); +int netdev_turn_flags_off(struct netdev *, enum netdev_flags, + struct netdev_saved_flags **); + +void netdev_restore_flags(struct netdev_saved_flags *); + /* TCP/IP stack interface. */ int netdev_get_in4(const struct netdev *, struct in_addr *address, struct in_addr *netmask); @@ -163,10 +241,6 @@ int netdev_get_next_hop(const struct netdev *, const struct in_addr *host, int netdev_get_status(const struct netdev *, struct smap *); int netdev_arp_lookup(const struct netdev *, ovs_be32 ip, uint8_t mac[6]); -int netdev_get_flags(const struct netdev *, enum netdev_flags *); -int netdev_set_flags(struct netdev *, enum netdev_flags, bool permanent); -int netdev_turn_flags_on(struct netdev *, enum netdev_flags, bool permanent); -int netdev_turn_flags_off(struct netdev *, enum netdev_flags, bool permanent); struct netdev *netdev_find_dev_by_in4(const struct in_addr *); /* Statistics. */ @@ -183,6 +257,9 @@ struct netdev_queue_stats { uint64_t tx_bytes; uint64_t tx_packets; uint64_t tx_errors; + + /* Time at which the queue was created, in msecs, LLONG_MIN if unknown. */ + long long int created; }; int netdev_set_policing(struct netdev *, uint32_t kbits_rate, @@ -207,11 +284,33 @@ int netdev_set_queue(struct netdev *, int netdev_delete_queue(struct netdev *, unsigned int queue_id); int netdev_get_queue_stats(const struct netdev *, unsigned int queue_id, struct netdev_queue_stats *); +uint64_t netdev_get_change_seq(const struct netdev *); -typedef void netdev_dump_queues_cb(unsigned int queue_id, - const struct smap *details, void *aux); -int netdev_dump_queues(const struct netdev *, - netdev_dump_queues_cb *, void *aux); +struct netdev_queue_dump { + struct netdev *netdev; + int error; + void *state; +}; +void netdev_queue_dump_start(struct netdev_queue_dump *, + const struct netdev *); +bool netdev_queue_dump_next(struct netdev_queue_dump *, + unsigned int *queue_id, struct smap *details); +int netdev_queue_dump_done(struct netdev_queue_dump *); + +/* Iterates through each queue in NETDEV, using DUMP as state. Fills QUEUE_ID + * and DETAILS with information about queues. The client must initialize and + * destroy DETAILS. + * + * Arguments all have pointer type. + * + * If you break out of the loop, then you need to free the dump structure by + * hand using netdev_queue_dump_done(). */ +#define NETDEV_QUEUE_FOR_EACH(QUEUE_ID, DETAILS, DUMP, NETDEV) \ + for (netdev_queue_dump_start(DUMP, NETDEV); \ + (netdev_queue_dump_next(DUMP, QUEUE_ID, DETAILS) \ + ? true \ + : (netdev_queue_dump_done(DUMP), false)); \ + ) typedef void netdev_dump_queue_stats_cb(unsigned int queue_id, struct netdev_queue_stats *, @@ -219,7 +318,7 @@ typedef void netdev_dump_queue_stats_cb(unsigned int queue_id, int netdev_dump_queue_stats(const struct netdev *, netdev_dump_queue_stats_cb *, void *aux); -unsigned int netdev_change_seq(const struct netdev *netdev); +enum { NETDEV_MAX_RX_BATCH = 256 }; /* Maximum number packets in rx_recv() batch. */ #ifdef __cplusplus }