/*
- * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013 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 <assert.h>
-
#include "netdev.h"
#include "list.h"
#include "shash.h"
/* A network device (e.g. an Ethernet device).
*
- * This structure should be treated as opaque by network device
- * implementations. */
-struct netdev_dev {
+ * Network device implementations should treat this structure as opaque. */
+struct netdev {
char *name; /* Name of network device. */
const struct netdev_class *netdev_class; /* Functions to control
this device. */
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". */
};
-void netdev_dev_init(struct netdev_dev *, const char *name,
- const struct netdev_class *);
-void netdev_dev_uninit(struct netdev_dev *, bool destroy);
-const char *netdev_dev_get_type(const struct netdev_dev *);
-const struct netdev_class *netdev_dev_get_class(const struct netdev_dev *);
-const char *netdev_dev_get_name(const struct netdev_dev *);
-struct netdev_dev *netdev_dev_from_name(const char *name);
-void netdev_dev_get_devices(const struct netdev_class *,
- struct shash *device_list);
-
-static inline void netdev_dev_assert_class(const struct netdev_dev *netdev_dev,
- const struct netdev_class *class_)
-{
- assert(netdev_dev->netdev_class == class_);
-}
-
-/* A instance of an open network device.
- *
- * This structure should be treated as opaque by network device
- * implementations. */
-struct netdev {
- struct netdev_dev *netdev_dev; /* Parent netdev_dev. */
- struct list node; /* Element in global list. */
-
- enum netdev_flags save_flags; /* Initial device flags. */
- enum netdev_flags changed_flags; /* Flags that we changed. */
-};
-
-void netdev_init(struct netdev *, struct netdev_dev *);
-void netdev_uninit(struct netdev *, bool close);
-struct netdev_dev *netdev_get_dev(const struct netdev *);
+void netdev_init(struct netdev *, const char *name,
+ const struct netdev_class *);
+void netdev_uninit(struct netdev *, bool destroy);
+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);
static inline void netdev_assert_class(const struct netdev *netdev,
- const struct netdev_class *netdev_class)
+ const struct netdev_class *class_)
{
- netdev_dev_assert_class(netdev_get_dev(netdev), netdev_class);
+ ovs_assert(netdev->netdev_class == class_);
}
/* Network device class structure, to be defined by each implementation of a
void (*wait)(void);
/* Attempts to create a network device named 'name' in 'netdev_class'. On
- * success sets 'netdev_devp' to the newly created device. */
+ * success sets 'netdevp' to the newly created device. */
int (*create)(const struct netdev_class *netdev_class, const char *name,
- struct netdev_dev **netdev_devp);
+ struct netdev **netdevp);
- /* Destroys 'netdev_dev'.
+ /* Destroys 'netdev'.
*
* Netdev devices maintain a reference count that is incremented on
- * netdev_open() and decremented on netdev_close(). If 'netdev_dev'
+ * netdev_open() and decremented on netdev_close(). If 'netdev'
* has a non-zero reference count, then this function will not be
* called. */
- void (*destroy)(struct netdev_dev *netdev_dev);
+ void (*destroy)(struct netdev *netdev);
- /* Fetches the device 'netdev_dev''s configuration, storing it in 'args'.
+ /* Fetches the device 'netdev''s configuration, storing it in 'args'.
* The caller owns 'args' and pre-initializes it to an empty smap.
*
* If this netdev class does not have any configuration options, this may
* be a null pointer. */
- int (*get_config)(struct netdev_dev *netdev_dev, struct smap *args);
+ int (*get_config)(const struct netdev *netdev, struct smap *args);
- /* Changes the device 'netdev_dev''s configuration to 'args'.
+ /* Changes the device 'netdev''s configuration to 'args'.
*
* If this netdev class does not support configuration, this may be a null
* pointer. */
- int (*set_config)(struct netdev_dev *netdev_dev, const struct smap *args);
+ int (*set_config)(struct netdev *netdev, const struct smap *args);
- /* Attempts to open a network device. On success, sets 'netdevp'
- * to the new network device. */
- int (*open)(struct netdev_dev *netdev_dev, struct netdev **netdevp);
-
- /* Closes 'netdev'. */
- void (*close)(struct netdev *netdev);
-\f
-/* ## ----------------- ## */
-/* ## Receiving Packets ## */
-/* ## ----------------- ## */
-
-/* The network provider interface is mostly used for inspecting and configuring
- * device "metadata", not for sending and receiving packets directly. It may
- * be impractical to implement these functions on some operating systems and
- * hardware. These functions may all be NULL in such cases.
- *
- * (However, the "dpif-netdev" implementation, which is the easiest way to
- * integrate Open vSwitch with a new operating system or hardware, does require
- * the ability to receive packets.) */
+ /* Returns the tunnel configuration of 'netdev'. If 'netdev' is
+ * not a tunnel, returns null.
+ *
+ * If this function would always return null, it may be null instead. */
+ const struct netdev_tunnel_config *
+ (*get_tunnel_config)(const struct netdev *netdev);
- /* Attempts to set up 'netdev' for receiving packets with ->recv().
- * Returns 0 if successful, otherwise a positive errno value. Return
+ /* Attempts to open a netdev_rx for receiving packets from 'netdev'.
+ * Returns 0 if successful, otherwise a positive errno value. Returns
* EOPNOTSUPP to indicate that the network device does not implement packet
* reception through this interface. This function may be set to null if
* it would always return EOPNOTSUPP anyhow. (This will prevent the
* network device from being usefully used by the netdev-based "userspace
- * datapath".)*/
- int (*listen)(struct netdev *netdev);
-
- /* Attempts to receive a packet from 'netdev' into the 'size' bytes in
- * 'buffer'. If successful, returns the number of bytes in the received
- * packet, otherwise a negative errno value. Returns -EAGAIN immediately
- * if no packet is ready to be received.
- *
- * Returns -EMSGSIZE, and discards the packet, if the received packet is
- * longer than 'size' bytes.
- *
- * This function can only be expected to return a packet if ->listen() has
- * been called successfully.
- *
- * May be null if not needed, such as for a network device that does not
- * implement packet reception through the 'recv' member function. */
- int (*recv)(struct netdev *netdev, void *buffer, size_t size);
-
- /* 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_recv() on
- * 'netdev'.
+ * datapath".)
*
- * May be null if not needed, such as for a network device that does not
- * implement packet reception through the 'recv' member function. */
- void (*recv_wait)(struct netdev *netdev);
+ * On success, the implementation must set '*rxp' to a 'netdev_rx' for
+ * 'netdev' that it has already initialized (with netdev_rx_init()). */
+ int (*rx_open)(struct netdev *netdev, struct netdev_rx **rxp);
- /* Discards all packets waiting to be received from 'netdev'.
- *
- * May be null if not needed, such as for a network device that does not
- * implement packet reception through the 'recv' member function. */
- int (*drain)(struct netdev *netdev);
-\f
/* Sends the 'size'-byte packet in '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
* anyhow. */
int (*add_router)(struct netdev *netdev, struct in_addr router);
- /* Looks up the next hop for 'host'. If succesful, stores the next hop
+ /* 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
/* Retrieves driver information of the device.
*
- * Populates 'sh' with key-value pairs representing the status of the
- * device. Driver info is a set of key-value string pairs
- * representing netdev type specific information. For more information see
+ * Populates 'smap' with key-value pairs representing the status of the
+ * device. 'smap' is a set of key-value string pairs representing netdev
+ * type specific information. For more information see
* ovs-vswitchd.conf.db(5).
*
* The caller is responsible for destroying 'smap' and its data.
*
* This function may be set to null if it would always return EOPNOTSUPP
* anyhow. */
- int (*get_drv_info)(const struct netdev *netdev, struct smap *smap);
+ int (*get_status)(const struct netdev *netdev, struct smap *smap);
/* Looks up the ARP table entry for 'ip' on 'netdev' and stores the
* corresponding MAC address in 'mac'. A return value of ENXIO, in
int (*arp_lookup)(const struct netdev *netdev, ovs_be32 ip,
uint8_t mac[6]);
- /* Retrieves the current set of flags on 'netdev' into '*old_flags'.
- * Then, turns off the flags that are set to 1 in 'off' and turns on the
- * flags that are set to 1 in 'on'. (No bit will be set to 1 in both 'off'
- * and 'on'; that is, off & on == 0.)
+ /* Retrieves the current set of flags on 'netdev' into '*old_flags'. Then,
+ * turns off the flags that are set to 1 in 'off' and turns on the flags
+ * that are set to 1 in 'on'. (No bit will be set to 1 in both 'off' and
+ * 'on'; that is, off & on == 0.)
*
* This function may be invoked from a signal handler. Therefore, it
* should not do anything that is not signal-safe (such as logging). */
* change, although implementations should try to avoid this. */
unsigned int (*change_seq)(const struct netdev *netdev);
};
+\f
+/* A data structure for capturing packets received by a network device.
+ *
+ * This structure should be treated as opaque by network device
+ * implementations. */
+struct netdev_rx {
+ const struct netdev_rx_class *rx_class;
+ struct netdev *netdev;
+};
+
+void netdev_rx_init(struct netdev_rx *, struct netdev *,
+ const struct netdev_rx_class *);
+void netdev_rx_uninit(struct netdev_rx *);
+struct netdev *netdev_rx_get_netdev(const struct netdev_rx *);
+
+struct netdev_rx_class {
+ /* Destroys 'rx'. */
+ void (*destroy)(struct netdev_rx *rx);
+
+ /* Attempts to receive a packet from 'rx' into the 'size' bytes in
+ * 'buffer'. If successful, returns the number of bytes in the received
+ * packet, otherwise a negative errno value. Returns -EAGAIN immediately
+ * if no packet is ready to be received.
+ *
+ * Must return -EMSGSIZE, and discard the packet, if the received packet
+ * is longer than 'size' bytes. */
+ int (*recv)(struct netdev_rx *rx, void *buffer, size_t size);
+
+ /* 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_rx_recv()
+ * on 'rx'. */
+ void (*wait)(struct netdev_rx *rx);
+
+ /* Discards all packets waiting to be received from 'rx'. */
+ int (*drain)(struct netdev_rx *rx);
+};
+
+static inline void netdev_rx_assert_class(const struct netdev_rx *rx,
+ const struct netdev_rx_class *class_)
+{
+ ovs_assert(rx->rx_class == class_);
+}
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;
-#ifdef __FreeBSD__
+#if defined(__FreeBSD__) || defined(__NetBSD__)
extern const struct netdev_class netdev_bsd_class;
#endif
git://git.onelab.eu / sliver-openvswitch.git / blobdiff