/*
- * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
/* Generic interface to network devices. */
+#include "connectivity.h"
#include "netdev.h"
#include "list.h"
+#include "ovs-numa.h"
+#include "seq.h"
#include "shash.h"
#include "smap.h"
extern "C" {
#endif
+#define NETDEV_NUMA_UNSPEC OVS_NUMA_UNSPEC
+
/* A network device (e.g. an Ethernet device).
*
* Network device implementations may read these members but should not modify
const struct netdev_class *netdev_class; /* Functions to control
this device. */
+ /* A sequence number which indicates changes in one of 'netdev''s
+ * properties. It must be nonzero so that users have a value which
+ * they may use as a reset when tracking 'netdev'.
+ *
+ * Minimally, the sequence number is required to change whenever
+ * 'netdev''s flags, features, ethernet address, or carrier changes. */
+ uint64_t change_seq;
+
/* The following are protected by 'netdev_mutex' (internal to netdev.c). */
+ int n_txq;
int n_rxq;
int ref_cnt; /* Times this devices was opened. */
struct shash_node *node; /* Pointer to element in global map. */
struct list saved_flags_list; /* Contains "struct netdev_saved_flags". */
};
+static void
+netdev_change_seq_changed(const struct netdev *netdev_)
+{
+ struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
+ seq_change(connectivity_seq_get());
+ netdev->change_seq++;
+ if (!netdev->change_seq) {
+ netdev->change_seq++;
+ }
+}
+
const char *netdev_get_type(const struct netdev *);
const struct netdev_class *netdev_get_class(const struct netdev *);
const char *netdev_get_name(const struct netdev *);
struct netdev *netdev_from_name(const char *name);
void netdev_get_devices(const struct netdev_class *,
struct shash *device_list);
+struct netdev **netdev_get_vports(size_t *size);
/* A data structure for capturing packets received by a network device.
*
const struct netdev_tunnel_config *
(*get_tunnel_config)(const struct netdev *netdev);
- /* Sends the buffer on 'netdev'.
- * Returns 0 if successful, otherwise a positive errno value. Returns
- * EAGAIN without blocking if the packet cannot be queued immediately.
- * Returns EMSGSIZE if a partial packet was transmitted or if the packet
- * is too big or too small to transmit on the device.
+ /* Returns the id of the numa node the 'netdev' is on. If there is no
+ * such info, returns NETDEV_NUMA_UNSPEC. */
+ int (*get_numa_id)(const struct netdev *netdev);
+
+ /* Configures the number of tx queues and rx queues of 'netdev'.
+ * Return 0 if successful, otherwise a positive errno value.
+ *
+ * On error, the tx queue and rx queue configuration is indeterminant.
+ * Caller should make decision on whether to restore the previous or
+ * the default configuration. Also, caller must make sure there is no
+ * other thread accessing the queues at the same time. */
+ int (*set_multiq)(struct netdev *netdev, unsigned int n_txq,
+ unsigned int n_rxq);
+
+ /* Sends buffers on 'netdev'.
+ * Returns 0 if successful (for every buffer), otherwise a positive errno
+ * value. Returns EAGAIN without blocking if one or more packets cannot be
+ * queued immediately. Returns EMSGSIZE if a partial packet was transmitted
+ * or if a packet is too big or too small to transmit on the device.
*
- * To retain ownership of 'buffer' caller can set may_steal to false.
+ * If the function returns a non-zero value, some of the packets might have
+ * been sent anyway.
*
- * The network device is expected to maintain a packet transmission queue,
- * so that the caller does not ordinarily have to do additional queuing of
- * packets.
+ * To retain ownership of 'buffers' caller can set may_steal to false.
+ *
+ * The network device is expected to maintain one or more packet
+ * transmission queues, so that the caller does not ordinarily have to
+ * do additional queuing of packets. 'qid' specifies the queue to use
+ * and can be ignored if the implementation does not support multiple
+ * queues.
*
* May return EOPNOTSUPP if a network device does not implement packet
* transmission through this interface. This function may be set to null
* network device from being usefully used by the netdev-based "userspace
* datapath". It will also prevent the OVS implementation of bonding from
* working properly over 'netdev'.) */
- int (*send)(struct netdev *netdev, struct ofpbuf *buffer, bool may_steal);
+ int (*send)(struct netdev *netdev, int qid, struct dpif_packet **buffers,
+ int cnt, bool may_steal);
/* Registers with the poll loop to wake up from the next call to
* poll_block() when the packet transmission queue for 'netdev' has
* sufficient room to transmit a packet with netdev_send().
*
- * The network device is expected to maintain a packet transmission queue,
- * so that the caller does not ordinarily have to do additional queuing of
- * packets. Thus, this function is unlikely to ever be useful.
+ * The network device is expected to maintain one or more packet
+ * transmission queues, so that the caller does not ordinarily have to
+ * do additional queuing of packets. 'qid' specifies the queue to use
+ * and can be ignored if the implementation does not support multiple
+ * queues.
*
* May be null if not needed, such as for a network device that does not
* implement packet transmission through the 'send' member function. */
- void (*send_wait)(struct netdev *netdev);
+ void (*send_wait)(struct netdev *netdev, int qid);
/* Sets 'netdev''s Ethernet address to 'mac' */
int (*set_etheraddr)(struct netdev *netdev, const uint8_t mac[6]);
* (UINT64_MAX). */
int (*get_stats)(const struct netdev *netdev, struct netdev_stats *);
- /* Sets the device stats for 'netdev' to 'stats'.
- *
- * Most network devices won't support this feature and will set this
- * function pointer to NULL, which is equivalent to returning EOPNOTSUPP.
- *
- * Some network devices might only allow setting their stats to 0. */
- int (*set_stats)(struct netdev *netdev, const struct netdev_stats *);
-
/* Stores the features supported by 'netdev' into each of '*current',
* '*advertised', '*supported', and '*peer'. Each value is a bitmap of
* NETDEV_F_* bits.
* anyhow. */
int (*add_router)(struct netdev *netdev, struct in_addr router);
- /* Looks up the next hop for 'host'. If successful, stores the next hop
- * gateway's address (0 if 'host' is on a directly connected network) in
- * '*next_hop' and a copy of the name of the device to reach 'host' in
- * '*netdev_name', and returns 0. The caller is responsible for freeing
- * '*netdev_name' (by calling free()).
+ /* Looks up the next hop for 'host' in the host's routing table. If
+ * successful, stores the next hop gateway's address (0 if 'host' is on a
+ * directly connected network) in '*next_hop' and a copy of the name of the
+ * device to reach 'host' in '*netdev_name', and returns 0. The caller is
+ * responsible for freeing '*netdev_name' (by calling free()).
*
* This function may be set to null if it would always return EOPNOTSUPP
* anyhow. */
void (*rxq_destruct)(struct netdev_rxq *);
void (*rxq_dealloc)(struct netdev_rxq *);
- /* Attempts to receive batch of packets from 'rx' and place array of pointers
- * into '*pkt'. netdev is responsible for allocating buffers.
+ /* Attempts to receive batch of packets from 'rx' and place array of
+ * pointers into '*pkts'. netdev is responsible for allocating buffers.
* '*cnt' points to packet count for given batch. Once packets are returned
* to caller, netdev should give up ownership of ofpbuf data.
*
* Caller is expected to pass array of size MAX_RX_BATCH.
* This function may be set to null if it would always return EOPNOTSUPP
* anyhow. */
- int (*rxq_recv)(struct netdev_rxq *rx, struct ofpbuf **pkt, int *cnt);
+ int (*rxq_recv)(struct netdev_rxq *rx, struct dpif_packet **pkts,
+ int *cnt);
/* Registers with the poll loop to wake up from the next call to
* poll_block() when a packet is ready to be received with netdev_rxq_recv()
int netdev_register_provider(const struct netdev_class *);
int netdev_unregister_provider(const char *type);
-extern const struct netdev_class netdev_linux_class;
-extern const struct netdev_class netdev_internal_class;
-extern const struct netdev_class netdev_tap_class;
#if defined(__FreeBSD__) || defined(__NetBSD__)
extern const struct netdev_class netdev_bsd_class;
+#elif defined(_WIN32)
+extern const struct netdev_class netdev_windows_class;
+#else
+extern const struct netdev_class netdev_linux_class;
#endif
+extern const struct netdev_class netdev_internal_class;
+extern const struct netdev_class netdev_tap_class;
#ifdef __cplusplus
}