/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 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.
#include <config.h>
#include "netdev.h"
-#include <assert.h>
#include <errno.h>
-#include <fcntl.h>
-#include <arpa/inet.h>
#include <inttypes.h>
-#include <linux/if_tun.h>
-#include <linux/types.h>
-#include <linux/ethtool.h>
-#include <linux/rtnetlink.h>
-#include <linux/sockios.h>
-#include <linux/version.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <netpacket/packet.h>
-#include <net/ethernet.h>
-#include <net/if.h>
-#include <net/if_arp.h>
-#include <net/if_packet.h>
-#include <net/route.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "coverage.h"
+#include "dpif.h"
#include "dynamic-string.h"
#include "fatal-signal.h"
+#include "hash.h"
#include "list.h"
-#include "netlink.h"
+#include "netdev-dpdk.h"
+#include "netdev-provider.h"
+#include "netdev-vport.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
#include "packets.h"
#include "poll-loop.h"
-#include "socket-util.h"
+#include "shash.h"
+#include "smap.h"
+#include "sset.h"
#include "svec.h"
+#include "vlog.h"
-/* linux/if.h defines IFF_LOWER_UP, net/if.h doesn't.
- * net/if.h defines if_nameindex(), linux/if.h doesn't.
- * We can't include both headers, so define IFF_LOWER_UP ourselves. */
-#ifndef IFF_LOWER_UP
-#define IFF_LOWER_UP 0x10000
-#endif
-
-/* These were introduced in Linux 2.6.14, so they might be missing if we have
- * old headers. */
-#ifndef ADVERTISED_Pause
-#define ADVERTISED_Pause (1 << 13)
-#endif
-#ifndef ADVERTISED_Asym_Pause
-#define ADVERTISED_Asym_Pause (1 << 14)
-#endif
+VLOG_DEFINE_THIS_MODULE(netdev);
-#define THIS_MODULE VLM_netdev
-#include "vlog.h"
+COVERAGE_DEFINE(netdev_received);
+COVERAGE_DEFINE(netdev_sent);
+COVERAGE_DEFINE(netdev_add_router);
+COVERAGE_DEFINE(netdev_get_stats);
-struct netdev {
- struct list node;
- char *name;
-
- /* File descriptors. For ordinary network devices, the two fds below are
- * the same; for tap devices, they differ. */
- int netdev_fd; /* Network device. */
- int tap_fd; /* TAP character device, if any, otherwise the
- * network device. */
-
- /* Cached network device information. */
- int ifindex; /* -1 if not known. */
- uint8_t etheraddr[ETH_ADDR_LEN];
- struct in6_addr in6;
- int speed;
- int mtu;
- int txqlen;
- int hwaddr_family;
-
- int save_flags; /* Initial device flags. */
- int changed_flags; /* Flags that we changed. */
+struct netdev_saved_flags {
+ struct netdev *netdev;
+ struct list node; /* In struct netdev's saved_flags_list. */
+ enum netdev_flags saved_flags;
+ enum netdev_flags saved_values;
};
-/* Policy for RTNLGRP_LINK messages.
+/* Protects 'netdev_shash' and the mutable members of struct netdev. */
+static struct ovs_mutex netdev_mutex = OVS_MUTEX_INITIALIZER;
+
+/* All created network devices. */
+static struct shash netdev_shash OVS_GUARDED_BY(netdev_mutex)
+ = SHASH_INITIALIZER(&netdev_shash);
+
+/* Protects 'netdev_classes' against insertions or deletions.
*
- * There are *many* more fields in these messages, but currently we only care
- * about interface names. */
-static const struct nl_policy rtnlgrp_link_policy[] = {
- [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
- [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true,
- .min_len = sizeof(struct rtnl_link_stats) },
+ * This is a recursive mutex to allow recursive acquisition when calling into
+ * providers. For example, netdev_run() calls into provider 'run' functions,
+ * which might reasonably want to call one of the netdev functions that takes
+ * netdev_class_mutex. */
+static struct ovs_mutex netdev_class_mutex OVS_ACQ_BEFORE(netdev_mutex);
+
+/* Contains 'struct netdev_registered_class'es. */
+static struct hmap netdev_classes OVS_GUARDED_BY(netdev_class_mutex)
+ = HMAP_INITIALIZER(&netdev_classes);
+
+struct netdev_registered_class {
+ struct hmap_node hmap_node; /* In 'netdev_classes', by class->type. */
+ const struct netdev_class *class;
+ atomic_int ref_cnt; /* Number of 'struct netdev's of this class. */
};
-/* All open network devices. */
-static struct list netdev_list = LIST_INITIALIZER(&netdev_list);
+/* This is set pretty low because we probably won't learn anything from the
+ * additional log messages. */
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
-/* An AF_INET socket (used for ioctl operations). */
-static int af_inet_sock = -1;
+static void restore_all_flags(void *aux OVS_UNUSED);
+void update_device_args(struct netdev *, const struct shash *args);
-/* NETLINK_ROUTE socket. */
-static struct nl_sock *rtnl_sock;
+int
+netdev_n_rxq(const struct netdev *netdev)
+{
+ return netdev->n_rxq;
+}
-/* Can we use RTM_GETLINK to get network device statistics? (In pre-2.6.19
- * kernels, this was only available if wireless extensions were enabled.) */
-static bool use_netlink_stats;
+bool
+netdev_is_pmd(const struct netdev *netdev)
+{
+ return !strcmp(netdev->netdev_class->type, "dpdk");
+}
-/* This is set pretty low because we probably won't learn anything from the
- * additional log messages. */
-static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
+static void
+netdev_class_mutex_initialize(void)
+ OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
+{
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+
+ if (ovsthread_once_start(&once)) {
+ ovs_mutex_init_recursive(&netdev_class_mutex);
+ ovsthread_once_done(&once);
+ }
+}
-static void init_netdev(void);
-static int do_open_netdev(const char *name, int ethertype, int tap_fd,
- struct netdev **netdev_);
-static int restore_flags(struct netdev *netdev);
-static int get_flags(const char *netdev_name, int *flagsp);
-static int set_flags(const char *netdev_name, int flags);
-static int do_get_ifindex(const char *netdev_name);
-static int get_ifindex(const struct netdev *, int *ifindexp);
-static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN],
- int *hwaddr_familyp);
-static int set_etheraddr(const char *netdev_name, int hwaddr_family,
- const uint8_t[ETH_ADDR_LEN]);
-
-/* Obtains the IPv6 address for 'name' into 'in6'. */
static void
-get_ipv6_address(const char *name, struct in6_addr *in6)
+netdev_initialize(void)
+ OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
{
- FILE *file;
- char line[128];
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+
+ if (ovsthread_once_start(&once)) {
+ netdev_class_mutex_initialize();
+
+ fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
+ netdev_vport_patch_register();
+
+#ifdef __linux__
+ netdev_register_provider(&netdev_linux_class);
+ netdev_register_provider(&netdev_internal_class);
+ netdev_register_provider(&netdev_tap_class);
+ netdev_vport_tunnel_register();
+#endif
+#if defined(__FreeBSD__) || defined(__NetBSD__)
+ netdev_register_provider(&netdev_tap_class);
+ netdev_register_provider(&netdev_bsd_class);
+#endif
+ netdev_dpdk_register();
- file = fopen("/proc/net/if_inet6", "r");
- if (file == NULL) {
- /* This most likely indicates that the host doesn't have IPv6 support,
- * so it's not really a failure condition.*/
- *in6 = in6addr_any;
- return;
+ ovsthread_once_done(&once);
}
+}
+
+/* Performs periodic work needed by all the various kinds of netdevs.
+ *
+ * If your program opens any netdevs, it must call this function within its
+ * main poll loop. */
+void
+netdev_run(void)
+ OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
+{
+ struct netdev_registered_class *rc;
- while (fgets(line, sizeof line, file)) {
- uint8_t *s6 = in6->s6_addr;
- char ifname[16 + 1];
-
-#define X8 "%2"SCNx8
- if (sscanf(line, " "X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8
- "%*x %*x %*x %*x %16s\n",
- &s6[0], &s6[1], &s6[2], &s6[3],
- &s6[4], &s6[5], &s6[6], &s6[7],
- &s6[8], &s6[9], &s6[10], &s6[11],
- &s6[12], &s6[13], &s6[14], &s6[15],
- ifname) == 17
- && !strcmp(name, ifname))
- {
- fclose(file);
- return;
+ ovs_mutex_lock(&netdev_class_mutex);
+ HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
+ if (rc->class->run) {
+ rc->class->run();
}
}
- *in6 = in6addr_any;
+ ovs_mutex_unlock(&netdev_class_mutex);
+}
- fclose(file);
+/* Arranges for poll_block() to wake up when netdev_run() needs to be called.
+ *
+ * If your program opens any netdevs, it must call this function within its
+ * main poll loop. */
+void
+netdev_wait(void)
+ OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
+{
+ struct netdev_registered_class *rc;
+
+ ovs_mutex_lock(&netdev_class_mutex);
+ HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
+ if (rc->class->wait) {
+ rc->class->wait();
+ }
+ }
+ ovs_mutex_unlock(&netdev_class_mutex);
}
-static int
-do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd,
- int cmd, const char *cmd_name)
+static struct netdev_registered_class *
+netdev_lookup_class(const char *type)
+ OVS_REQ_RDLOCK(netdev_class_mutex)
{
- struct ifreq ifr;
+ struct netdev_registered_class *rc;
- memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
- ifr.ifr_data = (caddr_t) ecmd;
+ HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
+ &netdev_classes) {
+ if (!strcmp(type, rc->class->type)) {
+ return rc;
+ }
+ }
+ return NULL;
+}
- ecmd->cmd = cmd;
- COVERAGE_INC(netdev_ethtool);
- if (ioctl(netdev->netdev_fd, SIOCETHTOOL, &ifr) == 0) {
- return 0;
+/* Initializes and registers a new netdev provider. After successful
+ * registration, new netdevs of that type can be opened using netdev_open(). */
+int
+netdev_register_provider(const struct netdev_class *new_class)
+ OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
+{
+ int error;
+
+ netdev_class_mutex_initialize();
+ ovs_mutex_lock(&netdev_class_mutex);
+ if (netdev_lookup_class(new_class->type)) {
+ VLOG_WARN("attempted to register duplicate netdev provider: %s",
+ new_class->type);
+ error = EEXIST;
} else {
- if (errno != EOPNOTSUPP) {
- VLOG_WARN_RL(&rl, "ethtool command %s on network device %s "
- "failed: %s", cmd_name, netdev->name,
- strerror(errno));
+ error = new_class->init ? new_class->init() : 0;
+ if (!error) {
+ struct netdev_registered_class *rc;
+
+ rc = xmalloc(sizeof *rc);
+ hmap_insert(&netdev_classes, &rc->hmap_node,
+ hash_string(new_class->type, 0));
+ rc->class = new_class;
+ atomic_init(&rc->ref_cnt, 0);
} else {
- /* The device doesn't support this operation. That's pretty
- * common, so there's no point in logging anything. */
+ VLOG_ERR("failed to initialize %s network device class: %s",
+ new_class->type, ovs_strerror(error));
}
- return errno;
}
+ ovs_mutex_unlock(&netdev_class_mutex);
+
+ return error;
}
-static int
-do_get_features(struct netdev *netdev,
- uint32_t *current, uint32_t *advertised,
- uint32_t *supported, uint32_t *peer)
+/* Unregisters a netdev provider. 'type' must have been previously
+ * registered and not currently be in use by any netdevs. After unregistration
+ * new netdevs of that type cannot be opened using netdev_open(). */
+int
+netdev_unregister_provider(const char *type)
+ OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
{
- struct ethtool_cmd ecmd;
+ struct netdev_registered_class *rc;
int error;
- *current = 0;
- *supported = 0;
- *advertised = 0;
- *peer = 0;
-
- memset(&ecmd, 0, sizeof ecmd);
- error = do_ethtool(netdev, &ecmd, ETHTOOL_GSET, "ETHTOOL_GSET");
- if (error) {
- return error;
- }
+ ovs_mutex_lock(&netdev_class_mutex);
+ rc = netdev_lookup_class(type);
+ if (!rc) {
+ VLOG_WARN("attempted to unregister a netdev provider that is not "
+ "registered: %s", type);
+ error = EAFNOSUPPORT;
+ } else {
+ int ref_cnt;
- if (ecmd.supported & SUPPORTED_10baseT_Half) {
- *supported |= OFPPF_10MB_HD;
- }
- if (ecmd.supported & SUPPORTED_10baseT_Full) {
- *supported |= OFPPF_10MB_FD;
- }
- if (ecmd.supported & SUPPORTED_100baseT_Half) {
- *supported |= OFPPF_100MB_HD;
- }
- if (ecmd.supported & SUPPORTED_100baseT_Full) {
- *supported |= OFPPF_100MB_FD;
- }
- if (ecmd.supported & SUPPORTED_1000baseT_Half) {
- *supported |= OFPPF_1GB_HD;
- }
- if (ecmd.supported & SUPPORTED_1000baseT_Full) {
- *supported |= OFPPF_1GB_FD;
- }
- if (ecmd.supported & SUPPORTED_10000baseT_Full) {
- *supported |= OFPPF_10GB_FD;
- }
- if (ecmd.supported & SUPPORTED_TP) {
- *supported |= OFPPF_COPPER;
- }
- if (ecmd.supported & SUPPORTED_FIBRE) {
- *supported |= OFPPF_FIBER;
- }
- if (ecmd.supported & SUPPORTED_Autoneg) {
- *supported |= OFPPF_AUTONEG;
- }
- if (ecmd.supported & SUPPORTED_Pause) {
- *supported |= OFPPF_PAUSE;
- }
- if (ecmd.supported & SUPPORTED_Asym_Pause) {
- *supported |= OFPPF_PAUSE_ASYM;
+ atomic_read(&rc->ref_cnt, &ref_cnt);
+ if (!ref_cnt) {
+ hmap_remove(&netdev_classes, &rc->hmap_node);
+ free(rc);
+ error = 0;
+ } else {
+ VLOG_WARN("attempted to unregister in use netdev provider: %s",
+ type);
+ error = EBUSY;
+ }
}
+ ovs_mutex_unlock(&netdev_class_mutex);
- /* Set the advertised features */
- if (ecmd.advertising & ADVERTISED_10baseT_Half) {
- *advertised |= OFPPF_10MB_HD;
- }
- if (ecmd.advertising & ADVERTISED_10baseT_Full) {
- *advertised |= OFPPF_10MB_FD;
- }
- if (ecmd.advertising & ADVERTISED_100baseT_Half) {
- *advertised |= OFPPF_100MB_HD;
- }
- if (ecmd.advertising & ADVERTISED_100baseT_Full) {
- *advertised |= OFPPF_100MB_FD;
- }
- if (ecmd.advertising & ADVERTISED_1000baseT_Half) {
- *advertised |= OFPPF_1GB_HD;
- }
- if (ecmd.advertising & ADVERTISED_1000baseT_Full) {
- *advertised |= OFPPF_1GB_FD;
- }
- if (ecmd.advertising & ADVERTISED_10000baseT_Full) {
- *advertised |= OFPPF_10GB_FD;
- }
- if (ecmd.advertising & ADVERTISED_TP) {
- *advertised |= OFPPF_COPPER;
- }
- if (ecmd.advertising & ADVERTISED_FIBRE) {
- *advertised |= OFPPF_FIBER;
- }
- if (ecmd.advertising & ADVERTISED_Autoneg) {
- *advertised |= OFPPF_AUTONEG;
- }
- if (ecmd.advertising & ADVERTISED_Pause) {
- *advertised |= OFPPF_PAUSE;
- }
- if (ecmd.advertising & ADVERTISED_Asym_Pause) {
- *advertised |= OFPPF_PAUSE_ASYM;
- }
+ return error;
+}
- /* Set the current features */
- if (ecmd.speed == SPEED_10) {
- *current = (ecmd.duplex) ? OFPPF_10MB_FD : OFPPF_10MB_HD;
- }
- else if (ecmd.speed == SPEED_100) {
- *current = (ecmd.duplex) ? OFPPF_100MB_FD : OFPPF_100MB_HD;
- }
- else if (ecmd.speed == SPEED_1000) {
- *current = (ecmd.duplex) ? OFPPF_1GB_FD : OFPPF_1GB_HD;
- }
- else if (ecmd.speed == SPEED_10000) {
- *current = OFPPF_10GB_FD;
- }
+/* Clears 'types' and enumerates the types of all currently registered netdev
+ * providers into it. The caller must first initialize the sset. */
+void
+netdev_enumerate_types(struct sset *types)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ struct netdev_registered_class *rc;
- if (ecmd.port == PORT_TP) {
- *current |= OFPPF_COPPER;
- }
- else if (ecmd.port == PORT_FIBRE) {
- *current |= OFPPF_FIBER;
- }
+ netdev_initialize();
+ sset_clear(types);
- if (ecmd.autoneg) {
- *current |= OFPPF_AUTONEG;
+ ovs_mutex_lock(&netdev_class_mutex);
+ HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
+ sset_add(types, rc->class->type);
}
- return 0;
+ ovs_mutex_unlock(&netdev_class_mutex);
}
-/* Opens the network device named 'name' (e.g. "eth0") and returns zero if
- * successful, otherwise a positive errno value. On success, sets '*netdevp'
- * to the new network device, otherwise to null.
+/* Check that the network device name is not the same as any of the registered
+ * vport providers' dpif_port name (dpif_port is NULL if the vport provider
+ * does not define it) or the datapath internal port name (e.g. ovs-system).
*
- * 'ethertype' may be a 16-bit Ethernet protocol value in host byte order to
- * capture frames of that type received on the device. It may also be one of
- * the 'enum netdev_pseudo_ethertype' values to receive frames in one of those
- * categories. */
-int
-netdev_open(const char *name, int ethertype, struct netdev **netdevp)
+ * Returns true if there is a name conflict, false otherwise. */
+bool
+netdev_is_reserved_name(const char *name)
+ OVS_EXCLUDED(netdev_mutex)
{
- if (!strncmp(name, "tap:", 4)) {
- return netdev_open_tap(name + 4, netdevp);
- } else {
- return do_open_netdev(name, ethertype, -1, netdevp);
+ struct netdev_registered_class *rc;
+
+ netdev_initialize();
+
+ ovs_mutex_lock(&netdev_class_mutex);
+ HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
+ const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
+ if (dpif_port && !strcmp(dpif_port, name)) {
+ ovs_mutex_unlock(&netdev_class_mutex);
+ return true;
+ }
+ }
+ ovs_mutex_unlock(&netdev_class_mutex);
+
+ if (!strncmp(name, "ovs-", 4)) {
+ struct sset types;
+ const char *type;
+
+ sset_init(&types);
+ dp_enumerate_types(&types);
+ SSET_FOR_EACH (type, &types) {
+ if (!strcmp(name+4, type)) {
+ sset_destroy(&types);
+ return true;
+ }
+ }
+ sset_destroy(&types);
}
+
+ return false;
}
-/* Opens a TAP virtual network device. If 'name' is a nonnull, non-empty
- * string, attempts to assign that name to the TAP device (failing if the name
- * is already in use); otherwise, a name is automatically assigned. Returns
- * zero if successful, otherwise a positive errno value. On success, sets
- * '*netdevp' to the new network device, otherwise to null. */
+/* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
+ * (e.g. "system") and returns zero if successful, otherwise a positive errno
+ * value. On success, sets '*netdevp' to the new network device, otherwise to
+ * null.
+ *
+ * Some network devices may need to be configured (with netdev_set_config())
+ * before they can be used. */
int
-netdev_open_tap(const char *name, struct netdev **netdevp)
+netdev_open(const char *name, const char *type, struct netdev **netdevp)
+ OVS_EXCLUDED(netdev_mutex)
{
- static const char tap_dev[] = "/dev/net/tun";
- struct ifreq ifr;
+ struct netdev *netdev;
int error;
- int tap_fd;
- tap_fd = open(tap_dev, O_RDWR);
- if (tap_fd < 0) {
- ovs_error(errno, "opening \"%s\" failed", tap_dev);
- return errno;
- }
+ netdev_initialize();
+
+ ovs_mutex_lock(&netdev_class_mutex);
+ ovs_mutex_lock(&netdev_mutex);
+ netdev = shash_find_data(&netdev_shash, name);
+ if (!netdev) {
+ struct netdev_registered_class *rc;
+
+ rc = netdev_lookup_class(type && type[0] ? type : "system");
+ if (rc) {
+ netdev = rc->class->alloc();
+ if (netdev) {
+ memset(netdev, 0, sizeof *netdev);
+ netdev->netdev_class = rc->class;
+ netdev->name = xstrdup(name);
+ netdev->change_seq = 1;
+ netdev->node = shash_add(&netdev_shash, name, netdev);
+
+ /* By default enable one rx queue per netdev. */
+ if (netdev->netdev_class->rxq_alloc) {
+ netdev->n_rxq = 1;
+ } else {
+ netdev->n_rxq = 0;
+ }
+ list_init(&netdev->saved_flags_list);
- memset(&ifr, 0, sizeof ifr);
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- if (name) {
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
- }
- if (ioctl(tap_fd, TUNSETIFF, &ifr) < 0) {
- int error = errno;
- ovs_error(error, "ioctl(TUNSETIFF) on \"%s\" failed", tap_dev);
- close(tap_fd);
- return error;
- }
+ error = rc->class->construct(netdev);
+ if (!error) {
+ int old_ref_cnt;
- error = set_nonblocking(tap_fd);
- if (error) {
- ovs_error(error, "set_nonblocking on \"%s\" failed", tap_dev);
- close(tap_fd);
- return error;
+ atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
+ netdev_change_seq_changed(netdev);
+ } else {
+ free(netdev->name);
+ ovs_assert(list_is_empty(&netdev->saved_flags_list));
+ shash_delete(&netdev_shash, netdev->node);
+ rc->class->dealloc(netdev);
+ }
+ } else {
+ error = ENOMEM;
+ }
+ } else {
+ VLOG_WARN("could not create netdev %s of unknown type %s",
+ name, type);
+ error = EAFNOSUPPORT;
+ }
+ } else {
+ error = 0;
}
- error = do_open_netdev(ifr.ifr_name, NETDEV_ETH_TYPE_NONE, tap_fd,
- netdevp);
- if (error) {
- close(tap_fd);
+ ovs_mutex_unlock(&netdev_mutex);
+ ovs_mutex_unlock(&netdev_class_mutex);
+
+ if (!error) {
+ netdev->ref_cnt++;
+ *netdevp = netdev;
+ } else {
+ *netdevp = NULL;
}
return error;
}
-static int
-do_open_netdev(const char *name, int ethertype, int tap_fd,
- struct netdev **netdev_)
-{
- int netdev_fd;
- struct sockaddr_ll sll;
- struct ifreq ifr;
- int ifindex = -1;
- uint8_t etheraddr[ETH_ADDR_LEN];
- struct in6_addr in6;
- int mtu;
- int txqlen;
- int hwaddr_family;
- int error;
- struct netdev *netdev;
+/* Returns a reference to 'netdev_' for the caller to own. Returns null if
+ * 'netdev_' is null. */
+struct netdev *
+netdev_ref(const struct netdev *netdev_)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
- init_netdev();
- *netdev_ = NULL;
- COVERAGE_INC(netdev_open);
-
- /* Create raw socket. */
- netdev_fd = socket(PF_PACKET, SOCK_RAW,
- htons(ethertype == NETDEV_ETH_TYPE_NONE ? 0
- : ethertype == NETDEV_ETH_TYPE_ANY ? ETH_P_ALL
- : ethertype == NETDEV_ETH_TYPE_802_2 ? ETH_P_802_2
- : ethertype));
- if (netdev_fd < 0) {
- return errno;
+ if (netdev) {
+ ovs_mutex_lock(&netdev_mutex);
+ ovs_assert(netdev->ref_cnt > 0);
+ netdev->ref_cnt++;
+ ovs_mutex_unlock(&netdev_mutex);
}
+ return netdev;
+}
- if (ethertype != NETDEV_ETH_TYPE_NONE) {
- /* Set non-blocking mode. */
- error = set_nonblocking(netdev_fd);
- if (error) {
- goto error_already_set;
- }
+/* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
+ * or NULL if none are needed. */
+int
+netdev_set_config(struct netdev *netdev, const struct smap *args)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ if (netdev->netdev_class->set_config) {
+ const struct smap no_args = SMAP_INITIALIZER(&no_args);
+ int error;
- /* Get ethernet device index. */
- ifindex = do_get_ifindex(name);
- if (ifindex < 0) {
- return -ifindex;
+ error = netdev->netdev_class->set_config(netdev,
+ args ? args : &no_args);
+ if (error) {
+ VLOG_WARN("%s: could not set configuration (%s)",
+ netdev_get_name(netdev), ovs_strerror(error));
}
+ return error;
+ } else if (args && !smap_is_empty(args)) {
+ VLOG_WARN("%s: arguments provided to device that is not configurable",
+ netdev_get_name(netdev));
+ }
+ return 0;
+}
- /* Bind to specific ethernet device. */
- memset(&sll, 0, sizeof sll);
- sll.sll_family = AF_PACKET;
- sll.sll_ifindex = ifindex;
- if (bind(netdev_fd, (struct sockaddr *) &sll, sizeof sll) < 0) {
- VLOG_ERR("bind to %s failed: %s", name, strerror(errno));
- goto error;
- }
+/* Returns the current configuration for 'netdev' in 'args'. The caller must
+ * have already initialized 'args' with smap_init(). Returns 0 on success, in
+ * which case 'args' will be filled with 'netdev''s configuration. On failure
+ * returns a positive errno value, in which case 'args' will be empty.
+ *
+ * The caller owns 'args' and its contents and must eventually free them with
+ * smap_destroy(). */
+int
+netdev_get_config(const struct netdev *netdev, struct smap *args)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ int error;
- /* Between the socket() and bind() calls above, the socket receives all
- * packets of the requested type on all system interfaces. We do not
- * want to receive that data, but there is no way to avoid it. So we
- * must now drain out the receive queue. */
- error = drain_rcvbuf(netdev_fd);
+ smap_clear(args);
+ if (netdev->netdev_class->get_config) {
+ error = netdev->netdev_class->get_config(netdev, args);
if (error) {
- goto error_already_set;
+ smap_clear(args);
}
+ } else {
+ error = 0;
}
- /* Get MAC address. */
- error = get_etheraddr(name, etheraddr, &hwaddr_family);
- if (error) {
- goto error_already_set;
- }
-
- /* Get MTU. */
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
- if (ioctl(netdev_fd, SIOCGIFMTU, &ifr) < 0) {
- VLOG_ERR("ioctl(SIOCGIFMTU) on %s device failed: %s",
- name, strerror(errno));
- goto error;
- }
- mtu = ifr.ifr_mtu;
+ return error;
+}
- /* Get TX queue length. */
- if (ioctl(netdev_fd, SIOCGIFTXQLEN, &ifr) < 0) {
- VLOG_ERR("ioctl(SIOCGIFTXQLEN) on %s device failed: %s",
- name, strerror(errno));
- goto error;
- }
- txqlen = ifr.ifr_qlen;
-
- get_ipv6_address(name, &in6);
-
- /* Allocate network device. */
- netdev = xmalloc(sizeof *netdev);
- netdev->name = xstrdup(name);
- netdev->ifindex = ifindex;
- netdev->txqlen = txqlen;
- netdev->hwaddr_family = hwaddr_family;
- netdev->netdev_fd = netdev_fd;
- netdev->tap_fd = tap_fd < 0 ? netdev_fd : tap_fd;
- memcpy(netdev->etheraddr, etheraddr, sizeof etheraddr);
- netdev->mtu = mtu;
- netdev->in6 = in6;
-
- /* Save flags to restore at close or exit. */
- error = get_flags(netdev->name, &netdev->save_flags);
- if (error) {
- goto error_already_set;
+const struct netdev_tunnel_config *
+netdev_get_tunnel_config(const struct netdev *netdev)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ if (netdev->netdev_class->get_tunnel_config) {
+ return netdev->netdev_class->get_tunnel_config(netdev);
+ } else {
+ return NULL;
}
- netdev->changed_flags = 0;
- fatal_signal_block();
- list_push_back(&netdev_list, &netdev->node);
- fatal_signal_unblock();
-
- /* Success! */
- *netdev_ = netdev;
- return 0;
+}
-error:
- error = errno;
-error_already_set:
- close(netdev_fd);
- if (tap_fd >= 0) {
- close(tap_fd);
+static void
+netdev_unref(struct netdev *dev)
+ OVS_RELEASES(netdev_mutex)
+{
+ ovs_assert(dev->ref_cnt);
+ if (!--dev->ref_cnt) {
+ const struct netdev_class *class = dev->netdev_class;
+ struct netdev_registered_class *rc;
+ int old_ref_cnt;
+
+ dev->netdev_class->destruct(dev);
+
+ shash_delete(&netdev_shash, dev->node);
+ free(dev->name);
+ dev->netdev_class->dealloc(dev);
+ ovs_mutex_unlock(&netdev_mutex);
+
+ ovs_mutex_lock(&netdev_class_mutex);
+ rc = netdev_lookup_class(class->type);
+ atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
+ ovs_assert(old_ref_cnt > 0);
+ ovs_mutex_unlock(&netdev_class_mutex);
+ } else {
+ ovs_mutex_unlock(&netdev_mutex);
}
- return error;
}
/* Closes and destroys 'netdev'. */
void
netdev_close(struct netdev *netdev)
+ OVS_EXCLUDED(netdev_mutex)
{
if (netdev) {
- /* Bring down interface and drop promiscuous mode, if we brought up
- * the interface or enabled promiscuous mode. */
- int error;
- fatal_signal_block();
- error = restore_flags(netdev);
- list_remove(&netdev->node);
- fatal_signal_unblock();
- if (error) {
- VLOG_WARN("failed to restore network device flags on %s: %s",
- netdev->name, strerror(error));
- }
-
- /* Free. */
- free(netdev->name);
- close(netdev->netdev_fd);
- if (netdev->netdev_fd != netdev->tap_fd) {
- close(netdev->tap_fd);
- }
- free(netdev);
+ ovs_mutex_lock(&netdev_mutex);
+ netdev_unref(netdev);
}
}
-/* Pads 'buffer' out with zero-bytes to the minimum valid length of an
- * Ethernet packet, if necessary. */
-static void
-pad_to_minimum_length(struct ofpbuf *buffer)
+/* Parses 'netdev_name_', which is of the form [type@]name into its component
+ * pieces. 'name' and 'type' must be freed by the caller. */
+void
+netdev_parse_name(const char *netdev_name_, char **name, char **type)
{
- if (buffer->size < ETH_TOTAL_MIN) {
- ofpbuf_put_zeros(buffer, ETH_TOTAL_MIN - buffer->size);
+ char *netdev_name = xstrdup(netdev_name_);
+ char *separator;
+
+ separator = strchr(netdev_name, '@');
+ if (separator) {
+ *separator = '\0';
+ *type = netdev_name;
+ *name = xstrdup(separator + 1);
+ } else {
+ *name = netdev_name;
+ *type = xstrdup("system");
}
}
-/* Attempts to receive a packet from 'netdev' into 'buffer', which the caller
- * must have initialized with sufficient room for the packet. The space
- * required to receive any packet is ETH_HEADER_LEN bytes, plus VLAN_HEADER_LEN
- * bytes, plus the device's MTU (which may be retrieved via netdev_get_mtu()).
- * (Some devices do not allow for a VLAN header, in which case VLAN_HEADER_LEN
- * need not be included.)
+/* Attempts to open a netdev_rxq handle for obtaining packets received on
+ * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
+ * '*rxp'. On failure, returns a positive errno value and stores NULL into
+ * '*rxp'.
*
- * If a packet is successfully retrieved, returns 0. In this case 'buffer' is
- * guaranteed to contain at least ETH_TOTAL_MIN bytes. Otherwise, returns a
- * positive errno value. Returns EAGAIN immediately if no packet is ready to
- * be returned.
- */
+ * Some kinds of network devices might not support receiving packets. This
+ * function returns EOPNOTSUPP in that case.*/
int
-netdev_recv(struct netdev *netdev, struct ofpbuf *buffer)
-{
- ssize_t n_bytes;
-
- assert(buffer->size == 0);
- assert(ofpbuf_tailroom(buffer) >= ETH_TOTAL_MIN);
- do {
- n_bytes = read(netdev->tap_fd,
- ofpbuf_tail(buffer), ofpbuf_tailroom(buffer));
- } while (n_bytes < 0 && errno == EINTR);
- if (n_bytes < 0) {
- if (errno != EAGAIN) {
- VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s",
- netdev->name, strerror(errno));
+netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp, int id)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ int error;
+
+ if (netdev->netdev_class->rxq_alloc && id < netdev->n_rxq) {
+ struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
+ if (rx) {
+ rx->netdev = netdev;
+ rx->queue_id = id;
+ error = netdev->netdev_class->rxq_construct(rx);
+ if (!error) {
+ ovs_mutex_lock(&netdev_mutex);
+ netdev->ref_cnt++;
+ ovs_mutex_unlock(&netdev_mutex);
+
+ *rxp = rx;
+ return 0;
+ }
+ netdev->netdev_class->rxq_dealloc(rx);
+ } else {
+ error = ENOMEM;
}
- return errno;
} else {
- COVERAGE_INC(netdev_received);
- buffer->size += n_bytes;
-
- /* When the kernel internally sends out an Ethernet frame on an
- * interface, it gives us a copy *before* padding the frame to the
- * minimum length. Thus, when it sends out something like an ARP
- * request, we see a too-short frame. So pad it out to the minimum
- * length. */
- pad_to_minimum_length(buffer);
- return 0;
+ error = EOPNOTSUPP;
}
+
+ *rxp = NULL;
+ return error;
}
-/* 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'. */
+/* Closes 'rx'. */
void
-netdev_recv_wait(struct netdev *netdev)
+netdev_rxq_close(struct netdev_rxq *rx)
+ OVS_EXCLUDED(netdev_mutex)
{
- poll_fd_wait(netdev->tap_fd, POLLIN);
+ if (rx) {
+ struct netdev *netdev = rx->netdev;
+ netdev->netdev_class->rxq_destruct(rx);
+ netdev->netdev_class->rxq_dealloc(rx);
+ netdev_close(netdev);
+ }
}
-/* Discards all packets waiting to be received from 'netdev'. */
+/* Attempts to receive batch of packets from 'rx'.
+ *
+ * Returns EAGAIN immediately if no packet is ready to be received.
+ *
+ * Returns EMSGSIZE, and discards the packet, if the received packet is longer
+ * than 'ofpbuf_tailroom(buffer)'.
+ *
+ * It is advised that the tailroom of 'buffer' should be
+ * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
+ * out-of-band VLAN header to be added to the packet. At the very least,
+ * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
+ *
+ * This function may be set to null if it would always return EOPNOTSUPP
+ * anyhow. */
int
-netdev_drain(struct netdev *netdev)
+netdev_rxq_recv(struct netdev_rxq *rx, struct ofpbuf **buffers, int *cnt)
{
- if (netdev->tap_fd != netdev->netdev_fd) {
- drain_fd(netdev->tap_fd, netdev->txqlen);
- return 0;
- } else {
- return drain_rcvbuf(netdev->netdev_fd);
+ int retval;
+
+ retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
+ if (!retval) {
+ COVERAGE_INC(netdev_received);
}
+ return retval;
+}
+
+/* Arranges for poll_block() to wake up when a packet is ready to be received
+ * on 'rx'. */
+void
+netdev_rxq_wait(struct netdev_rxq *rx)
+{
+ rx->netdev->netdev_class->rxq_wait(rx);
+}
+
+/* Discards any packets ready to be received on 'rx'. */
+int
+netdev_rxq_drain(struct netdev_rxq *rx)
+{
+ return (rx->netdev->netdev_class->rxq_drain
+ ? rx->netdev->netdev_class->rxq_drain(rx)
+ : 0);
}
/* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
* immediately. Returns EMSGSIZE if a partial packet was transmitted or if
* the packet is too big or too small to transmit on the device.
*
- * The caller retains ownership of 'buffer' in all cases.
+ * To retain ownership of 'buffer' caller can set may_steal to false.
*
* The kernel maintains a packet transmission queue, so the caller is not
- * expected to do additional queuing of packets. */
+ * expected to do additional queuing of packets.
+ *
+ * Some network devices may not implement support for this function. In such
+ * cases this function will always return EOPNOTSUPP. */
int
-netdev_send(struct netdev *netdev, const struct ofpbuf *buffer)
-{
- ssize_t n_bytes;
-
- do {
- n_bytes = write(netdev->tap_fd, buffer->data, buffer->size);
- } while (n_bytes < 0 && errno == EINTR);
-
- if (n_bytes < 0) {
- /* The Linux AF_PACKET implementation never blocks waiting for room
- * for packets, instead returning ENOBUFS. Translate this into EAGAIN
- * for the caller. */
- if (errno == ENOBUFS) {
- return EAGAIN;
- } else if (errno != EAGAIN) {
- VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s",
- netdev->name, strerror(errno));
- }
- return errno;
- } else if (n_bytes != buffer->size) {
- VLOG_WARN_RL(&rl,
- "send partial Ethernet packet (%d bytes of %zu) on %s",
- (int) n_bytes, buffer->size, netdev->name);
- return EMSGSIZE;
- } else {
+netdev_send(struct netdev *netdev, struct ofpbuf *buffer, bool may_steal)
+{
+ int error;
+
+ error = (netdev->netdev_class->send
+ ? netdev->netdev_class->send(netdev, buffer, may_steal)
+ : EOPNOTSUPP);
+ if (!error) {
COVERAGE_INC(netdev_sent);
- return 0;
}
+ return error;
}
/* Registers with the poll loop to wake up from the next call to poll_block()
void
netdev_send_wait(struct netdev *netdev)
{
- if (netdev->tap_fd == netdev->netdev_fd) {
- poll_fd_wait(netdev->tap_fd, POLLOUT);
- } else {
- /* TAP device always accepts packets.*/
- poll_immediate_wake();
+ if (netdev->netdev_class->send_wait) {
+ netdev->netdev_class->send_wait(netdev);
}
}
int
netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
{
- int error = set_etheraddr(netdev->name, netdev->hwaddr_family, mac);
- if (!error) {
- memcpy(netdev->etheraddr, mac, ETH_ADDR_LEN);
- }
- return error;
+ return netdev->netdev_class->set_etheraddr(netdev, mac);
}
+/* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
+ * the MAC address into 'mac'. On failure, returns a positive errno value and
+ * clears 'mac' to all-zeros. */
int
-netdev_nodev_set_etheraddr(const char *name, const uint8_t mac[ETH_ADDR_LEN])
+netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
{
- init_netdev();
- return set_etheraddr(name, ARPHRD_ETHER, mac);
-}
-
-/* Returns a pointer to 'netdev''s MAC address. The caller must not modify or
- * free the returned buffer. */
-const uint8_t *
-netdev_get_etheraddr(const struct netdev *netdev)
-{
- return netdev->etheraddr;
+ return netdev->netdev_class->get_etheraddr(netdev, mac);
}
/* Returns the name of the network device that 'netdev' represents,
return netdev->name;
}
-/* Returns the maximum size of transmitted (and received) packets on 'netdev',
- * in bytes, not including the hardware header; thus, this is typically 1500
- * bytes for Ethernet devices. */
+/* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
+ * (and received) packets, in bytes, not including the hardware header; thus,
+ * this is typically 1500 bytes for Ethernet devices.
+ *
+ * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
+ * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
+ * On other failure, returns a positive errno value. On failure, sets '*mtup'
+ * to 0. */
int
-netdev_get_mtu(const struct netdev *netdev)
+netdev_get_mtu(const struct netdev *netdev, int *mtup)
{
- return netdev->mtu;
-}
+ const struct netdev_class *class = netdev->netdev_class;
+ int error;
-/* Stores the features supported by 'netdev' into each of '*current',
- * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
- * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
- * successful, otherwise a positive errno value. On failure, all of the
- * passed-in values are set to 0. */
-int
-netdev_get_features(struct netdev *netdev,
- uint32_t *current, uint32_t *advertised,
- uint32_t *supported, uint32_t *peer)
-{
- uint32_t dummy[4];
- return do_get_features(netdev,
- current ? current : &dummy[0],
- advertised ? advertised : &dummy[1],
- supported ? supported : &dummy[2],
- peer ? peer : &dummy[3]);
+ error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
+ if (error) {
+ *mtup = 0;
+ if (error != EOPNOTSUPP) {
+ VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
+ "%s", netdev_get_name(netdev), ovs_strerror(error));
+ }
+ }
+ return error;
}
+/* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
+ * (and received) packets, in bytes.
+ *
+ * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
+ * MTU (as e.g. some tunnels do not). On other failure, returns a positive
+ * errno value. */
int
-netdev_set_advertisements(struct netdev *netdev, uint32_t advertise)
+netdev_set_mtu(const struct netdev *netdev, int mtu)
{
- struct ethtool_cmd ecmd;
+ const struct netdev_class *class = netdev->netdev_class;
int error;
- memset(&ecmd, 0, sizeof ecmd);
- error = do_ethtool(netdev, &ecmd, ETHTOOL_GSET, "ETHTOOL_GSET");
- if (error) {
- return error;
+ error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
+ if (error && error != EOPNOTSUPP) {
+ VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
+ netdev_get_name(netdev), ovs_strerror(error));
}
- ecmd.advertising = 0;
- if (advertise & OFPPF_10MB_HD) {
- ecmd.advertising |= ADVERTISED_10baseT_Half;
- }
- if (advertise & OFPPF_10MB_FD) {
- ecmd.advertising |= ADVERTISED_10baseT_Full;
- }
- if (advertise & OFPPF_100MB_HD) {
- ecmd.advertising |= ADVERTISED_100baseT_Half;
- }
- if (advertise & OFPPF_100MB_FD) {
- ecmd.advertising |= ADVERTISED_100baseT_Full;
- }
- if (advertise & OFPPF_1GB_HD) {
- ecmd.advertising |= ADVERTISED_1000baseT_Half;
- }
- if (advertise & OFPPF_1GB_FD) {
- ecmd.advertising |= ADVERTISED_1000baseT_Full;
- }
- if (advertise & OFPPF_10GB_FD) {
- ecmd.advertising |= ADVERTISED_10000baseT_Full;
- }
- if (advertise & OFPPF_COPPER) {
- ecmd.advertising |= ADVERTISED_TP;
- }
- if (advertise & OFPPF_FIBER) {
- ecmd.advertising |= ADVERTISED_FIBRE;
- }
- if (advertise & OFPPF_AUTONEG) {
- ecmd.advertising |= ADVERTISED_Autoneg;
- }
- if (advertise & OFPPF_PAUSE) {
- ecmd.advertising |= ADVERTISED_Pause;
- }
- if (advertise & OFPPF_PAUSE_ASYM) {
- ecmd.advertising |= ADVERTISED_Asym_Pause;
- }
- return do_ethtool(netdev, &ecmd, ETHTOOL_SSET, "ETHTOOL_SSET");
+ return error;
}
-/* If 'netdev' has an assigned IPv4 address, sets '*in4' to that address
- * and '*mask' to the netmask (if they are non-null) and returns true.
- * Otherwise, returns false. */
-bool
-netdev_nodev_get_in4(const char *netdev_name, struct in_addr *in4,
- struct in_addr *mask)
+/* Returns the ifindex of 'netdev', if successful, as a positive number. On
+ * failure, returns a negative errno value.
+ *
+ * The desired semantics of the ifindex value are a combination of those
+ * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
+ * value should be unique within a host and remain stable at least until
+ * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
+ * but many systems do not follow this rule anyhow.
+ *
+ * Some network devices may not implement support for this function. In such
+ * cases this function will always return -EOPNOTSUPP.
+ */
+int
+netdev_get_ifindex(const struct netdev *netdev)
{
- struct ifreq ifr;
- struct in_addr ip = { INADDR_ANY };
+ int (*get_ifindex)(const struct netdev *);
- init_netdev();
+ get_ifindex = netdev->netdev_class->get_ifindex;
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- ifr.ifr_addr.sa_family = AF_INET;
- COVERAGE_INC(netdev_get_in4);
- if (ioctl(af_inet_sock, SIOCGIFADDR, &ifr) == 0) {
- struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
- ip = sin->sin_addr;
- } else {
- VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFADDR) failed: %s",
- netdev_name, strerror(errno));
+ return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
+}
+
+/* Stores the features supported by 'netdev' into each of '*current',
+ * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
+ * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
+ * successful, otherwise a positive errno value. On failure, all of the
+ * passed-in values are set to 0.
+ *
+ * Some network devices may not implement support for this function. In such
+ * cases this function will always return EOPNOTSUPP. */
+int
+netdev_get_features(const struct netdev *netdev,
+ enum netdev_features *current,
+ enum netdev_features *advertised,
+ enum netdev_features *supported,
+ enum netdev_features *peer)
+{
+ int (*get_features)(const struct netdev *netdev,
+ enum netdev_features *current,
+ enum netdev_features *advertised,
+ enum netdev_features *supported,
+ enum netdev_features *peer);
+ enum netdev_features dummy[4];
+ int error;
+
+ if (!current) {
+ current = &dummy[0];
}
- if (in4) {
- *in4 = ip;
+ if (!advertised) {
+ advertised = &dummy[1];
+ }
+ if (!supported) {
+ supported = &dummy[2];
+ }
+ if (!peer) {
+ peer = &dummy[3];
}
- if (mask) {
- if (ioctl(af_inet_sock, SIOCGIFNETMASK, &ifr) == 0) {
- struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
- *mask = sin->sin_addr;
- } else {
- VLOG_DBG_RL(&rl, "%s: ioctl(SIOCGIFNETMASK) failed: %s",
- netdev_name, strerror(errno));
- }
+ get_features = netdev->netdev_class->get_features;
+ error = get_features
+ ? get_features(netdev, current, advertised, supported,
+ peer)
+ : EOPNOTSUPP;
+ if (error) {
+ *current = *advertised = *supported = *peer = 0;
}
+ return error;
+}
- return ip.s_addr != INADDR_ANY;
+/* Returns the maximum speed of a network connection that has the NETDEV_F_*
+ * bits in 'features', in bits per second. If no bits that indicate a speed
+ * are set in 'features', returns 'default_bps'. */
+uint64_t
+netdev_features_to_bps(enum netdev_features features,
+ uint64_t default_bps)
+{
+ enum {
+ F_1000000MB = NETDEV_F_1TB_FD,
+ F_100000MB = NETDEV_F_100GB_FD,
+ F_40000MB = NETDEV_F_40GB_FD,
+ F_10000MB = NETDEV_F_10GB_FD,
+ F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
+ F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
+ F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
+ };
+
+ return ( features & F_1000000MB ? UINT64_C(1000000000000)
+ : features & F_100000MB ? UINT64_C(100000000000)
+ : features & F_40000MB ? UINT64_C(40000000000)
+ : features & F_10000MB ? UINT64_C(10000000000)
+ : features & F_1000MB ? UINT64_C(1000000000)
+ : features & F_100MB ? UINT64_C(100000000)
+ : features & F_10MB ? UINT64_C(10000000)
+ : default_bps);
}
+/* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
+ * are set in 'features', otherwise false. */
bool
-netdev_get_in4(const struct netdev *netdev, struct in_addr *in4, struct
- in_addr *mask)
+netdev_features_is_full_duplex(enum netdev_features features)
{
- return netdev_nodev_get_in4(netdev->name, in4, mask);
+ return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
+ | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
+ | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
}
-static void
-make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
+/* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
+ * successful, otherwise a positive errno value. */
+int
+netdev_set_advertisements(struct netdev *netdev,
+ enum netdev_features advertise)
{
- struct sockaddr_in sin;
- memset(&sin, 0, sizeof sin);
- sin.sin_family = AF_INET;
- sin.sin_addr = addr;
- sin.sin_port = 0;
-
- memset(sa, 0, sizeof *sa);
- memcpy(sa, &sin, sizeof sin);
+ return (netdev->netdev_class->set_advertisements
+ ? netdev->netdev_class->set_advertisements(
+ netdev, advertise)
+ : EOPNOTSUPP);
}
-static int
-do_set_addr(struct netdev *netdev, int sock,
- int ioctl_nr, const char *ioctl_name, struct in_addr addr)
+/* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
+ * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
+ * errno value and sets '*address' to 0 (INADDR_ANY).
+ *
+ * The following error values have well-defined meanings:
+ *
+ * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
+ *
+ * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
+ *
+ * 'address' or 'netmask' or both may be null, in which case the address or
+ * netmask is not reported. */
+int
+netdev_get_in4(const struct netdev *netdev,
+ struct in_addr *address_, struct in_addr *netmask_)
{
- struct ifreq ifr;
+ struct in_addr address;
+ struct in_addr netmask;
int error;
- strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
- make_in4_sockaddr(&ifr.ifr_addr, addr);
- COVERAGE_INC(netdev_set_in4);
- error = ioctl(sock, ioctl_nr, &ifr) < 0 ? errno : 0;
- if (error) {
- VLOG_WARN("ioctl(%s): %s", ioctl_name, strerror(error));
+ error = (netdev->netdev_class->get_in4
+ ? netdev->netdev_class->get_in4(netdev,
+ &address, &netmask)
+ : EOPNOTSUPP);
+ if (address_) {
+ address_->s_addr = error ? 0 : address.s_addr;
+ }
+ if (netmask_) {
+ netmask_->s_addr = error ? 0 : netmask.s_addr;
}
return error;
}
int
netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
{
- int error;
-
- error = do_set_addr(netdev, af_inet_sock,
- SIOCSIFADDR, "SIOCSIFADDR", addr);
- if (!error && addr.s_addr != INADDR_ANY) {
- error = do_set_addr(netdev, af_inet_sock,
- SIOCSIFNETMASK, "SIOCSIFNETMASK", mask);
- }
- return error;
+ return (netdev->netdev_class->set_in4
+ ? netdev->netdev_class->set_in4(netdev, addr, mask)
+ : EOPNOTSUPP);
}
-/* Adds 'router' as a default IP gateway. */
+/* Obtains ad IPv4 address from device name and save the address in
+ * in4. Returns 0 if successful, otherwise a positive errno value.
+ */
int
-netdev_add_router(struct in_addr router)
+netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
{
- struct in_addr any = { INADDR_ANY };
- struct rtentry rt;
+ struct netdev *netdev;
int error;
- memset(&rt, 0, sizeof rt);
- make_in4_sockaddr(&rt.rt_dst, any);
- make_in4_sockaddr(&rt.rt_gateway, router);
- make_in4_sockaddr(&rt.rt_genmask, any);
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- COVERAGE_INC(netdev_add_router);
- error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0;
+ error = netdev_open(device_name, "system", &netdev);
if (error) {
- VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error));
+ in4->s_addr = htonl(0);
+ return error;
}
+
+ error = netdev_get_in4(netdev, in4, NULL);
+ netdev_close(netdev);
return error;
}
-/* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
- * 'in6' is non-null) and returns true. Otherwise, returns false. */
-bool
-netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
+/* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
+ * to 'netdev'. */
+int
+netdev_add_router(struct netdev *netdev, struct in_addr router)
{
- if (in6) {
- *in6 = netdev->in6;
+ COVERAGE_INC(netdev_add_router);
+ return (netdev->netdev_class->add_router
+ ? netdev->netdev_class->add_router(netdev, router)
+ : EOPNOTSUPP);
+}
+
+/* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
+ * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
+ * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
+ * next hop is found, 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()). */
+int
+netdev_get_next_hop(const struct netdev *netdev,
+ const struct in_addr *host, struct in_addr *next_hop,
+ char **netdev_name)
+{
+ int error = (netdev->netdev_class->get_next_hop
+ ? netdev->netdev_class->get_next_hop(
+ host, next_hop, netdev_name)
+ : EOPNOTSUPP);
+ if (error) {
+ next_hop->s_addr = 0;
+ *netdev_name = NULL;
}
- return memcmp(&netdev->in6, &in6addr_any, sizeof netdev->in6) != 0;
+ return error;
}
-/* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
- * Returns 0 if successful, otherwise a positive errno value. On failure,
- * stores 0 into '*flagsp'. */
+/* Populates 'smap' with status information.
+ *
+ * Populates 'smap' with 'netdev' specific status information. This
+ * information may be used to populate the status column of the Interface table
+ * as defined in ovs-vswitchd.conf.db(5). */
int
-netdev_get_flags(const struct netdev *netdev, enum netdev_flags *flagsp)
+netdev_get_status(const struct netdev *netdev, struct smap *smap)
{
- return netdev_nodev_get_flags(netdev->name, flagsp);
+ return (netdev->netdev_class->get_status
+ ? netdev->netdev_class->get_status(netdev, smap)
+ : EOPNOTSUPP);
}
-static int
-nd_to_iff_flags(enum netdev_flags nd)
+/* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
+ * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
+ * all-zero-bits (in6addr_any).
+ *
+ * The following error values have well-defined meanings:
+ *
+ * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
+ *
+ * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
+ *
+ * 'in6' may be null, in which case the address itself is not reported. */
+int
+netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
{
- int iff = 0;
- if (nd & NETDEV_UP) {
- iff |= IFF_UP;
- }
- if (nd & NETDEV_PROMISC) {
- iff |= IFF_PROMISC;
+ struct in6_addr dummy;
+ int error;
+
+ error = (netdev->netdev_class->get_in6
+ ? netdev->netdev_class->get_in6(netdev,
+ in6 ? in6 : &dummy)
+ : EOPNOTSUPP);
+ if (error && in6) {
+ memset(in6, 0, sizeof *in6);
}
- return iff;
+ return error;
}
/* On 'netdev', turns off the flags in 'off' and then turns on the flags in
- * 'on'. If 'permanent' is true, the changes will persist; otherwise, they
- * will be reverted when 'netdev' is closed or the program exits. Returns 0 if
- * successful, otherwise a positive errno value. */
+ * 'on'. Returns 0 if successful, otherwise a positive errno value. */
static int
do_update_flags(struct netdev *netdev, enum netdev_flags off,
- enum netdev_flags on, bool permanent)
+ enum netdev_flags on, enum netdev_flags *old_flagsp,
+ struct netdev_saved_flags **sfp)
+ OVS_EXCLUDED(netdev_mutex)
{
- int old_flags, new_flags;
+ struct netdev_saved_flags *sf = NULL;
+ enum netdev_flags old_flags;
int error;
- error = get_flags(netdev->name, &old_flags);
+ error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
+ &old_flags);
if (error) {
- return error;
+ VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
+ off || on ? "set" : "get", netdev_get_name(netdev),
+ ovs_strerror(error));
+ old_flags = 0;
+ } else if ((off || on) && sfp) {
+ enum netdev_flags new_flags = (old_flags & ~off) | on;
+ enum netdev_flags changed_flags = old_flags ^ new_flags;
+ if (changed_flags) {
+ ovs_mutex_lock(&netdev_mutex);
+ *sfp = sf = xmalloc(sizeof *sf);
+ sf->netdev = netdev;
+ list_push_front(&netdev->saved_flags_list, &sf->node);
+ sf->saved_flags = changed_flags;
+ sf->saved_values = changed_flags & new_flags;
+
+ netdev->ref_cnt++;
+ ovs_mutex_unlock(&netdev_mutex);
+ }
}
- new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
- if (!permanent) {
- netdev->changed_flags |= new_flags ^ old_flags;
+ if (old_flagsp) {
+ *old_flagsp = old_flags;
}
- if (new_flags != old_flags) {
- error = set_flags(netdev->name, new_flags);
+ if (sfp) {
+ *sfp = sf;
}
+
return error;
}
+/* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
+ * Returns 0 if successful, otherwise a positive errno value. On failure,
+ * stores 0 into '*flagsp'. */
+int
+netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
+{
+ struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
+ return do_update_flags(netdev, 0, 0, flagsp, NULL);
+}
+
/* Sets the flags for 'netdev' to 'flags'.
- * If 'permanent' is true, the changes will persist; otherwise, they
- * will be reverted when 'netdev' is closed or the program exits.
* Returns 0 if successful, otherwise a positive errno value. */
int
netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
- bool permanent)
+ struct netdev_saved_flags **sfp)
{
- return do_update_flags(netdev, -1, flags, permanent);
+ return do_update_flags(netdev, -1, flags, NULL, sfp);
}
-/* Turns on the specified 'flags' on 'netdev'.
- * If 'permanent' is true, the changes will persist; otherwise, they
- * will be reverted when 'netdev' is closed or the program exits.
- * Returns 0 if successful, otherwise a positive errno value. */
+/* Turns on the specified 'flags' on 'netdev':
+ *
+ * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
+ * allocated 'struct netdev_saved_flags *' that may be passed to
+ * netdev_restore_flags() to restore the original values of 'flags' on
+ * 'netdev' (this will happen automatically at program termination if
+ * netdev_restore_flags() is never called) , or to NULL if no flags were
+ * actually changed.
+ *
+ * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
+ * '*sfp' to NULL. */
int
netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
- bool permanent)
+ struct netdev_saved_flags **sfp)
{
- return do_update_flags(netdev, 0, flags, permanent);
+ return do_update_flags(netdev, 0, flags, NULL, sfp);
}
-/* Turns off the specified 'flags' on 'netdev'.
- * If 'permanent' is true, the changes will persist; otherwise, they
- * will be reverted when 'netdev' is closed or the program exits.
- * Returns 0 if successful, otherwise a positive errno value. */
+/* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
+ * details of the interface. */
int
netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
- bool permanent)
+ struct netdev_saved_flags **sfp)
{
- return do_update_flags(netdev, flags, 0, permanent);
+ return do_update_flags(netdev, flags, 0, NULL, sfp);
}
-/* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
- * successfully retrieved, it stores the corresponding MAC address in 'mac' and
- * returns 0. Otherwise, it returns a positive errno value; in particular,
- * ENXIO indicates that there is not ARP table entry for 'ip' on 'netdev'. */
-int
-netdev_nodev_arp_lookup(const char *netdev_name, uint32_t ip,
- uint8_t mac[ETH_ADDR_LEN])
+/* Restores the flags that were saved in 'sf', and destroys 'sf'.
+ * Does nothing if 'sf' is NULL. */
+void
+netdev_restore_flags(struct netdev_saved_flags *sf)
+ OVS_EXCLUDED(netdev_mutex)
{
- struct arpreq r;
- struct sockaddr_in *pa;
- int retval;
+ if (sf) {
+ struct netdev *netdev = sf->netdev;
+ enum netdev_flags old_flags;
- init_netdev();
-
- memset(&r, 0, sizeof r);
- pa = (struct sockaddr_in *) &r.arp_pa;
- pa->sin_family = AF_INET;
- pa->sin_addr.s_addr = ip;
- pa->sin_port = 0;
- r.arp_ha.sa_family = ARPHRD_ETHER;
- r.arp_flags = 0;
- strncpy(r.arp_dev, netdev_name, sizeof r.arp_dev);
- COVERAGE_INC(netdev_arp_lookup);
- retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0;
- if (!retval) {
- memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN);
- } else if (retval != ENXIO) {
- VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s",
- netdev_name, IP_ARGS(&ip), strerror(retval));
+ netdev->netdev_class->update_flags(netdev,
+ sf->saved_flags & sf->saved_values,
+ sf->saved_flags & ~sf->saved_values,
+ &old_flags);
+
+ ovs_mutex_lock(&netdev_mutex);
+ list_remove(&sf->node);
+ free(sf);
+ netdev_unref(netdev);
}
- return retval;
}
+/* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
+ * successfully retrieved, it stores the corresponding MAC address in 'mac' and
+ * returns 0. Otherwise, it returns a positive errno value; in particular,
+ * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
int
-netdev_arp_lookup(const struct netdev *netdev, uint32_t ip,
- uint8_t mac[ETH_ADDR_LEN])
+netdev_arp_lookup(const struct netdev *netdev,
+ ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
{
- return netdev_nodev_arp_lookup(netdev->name, ip, mac);
+ int error = (netdev->netdev_class->arp_lookup
+ ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
+ : EOPNOTSUPP);
+ if (error) {
+ memset(mac, 0, ETH_ADDR_LEN);
+ }
+ return error;
}
-static int
-get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
+/* Returns true if carrier is active (link light is on) on 'netdev'. */
+bool
+netdev_get_carrier(const struct netdev *netdev)
{
- struct ofpbuf request;
- struct ofpbuf *reply;
- struct ifinfomsg *ifi;
- const struct rtnl_link_stats *rtnl_stats;
- struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
int error;
+ enum netdev_flags flags;
+ bool carrier;
- ofpbuf_init(&request, 0);
- nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *ifi,
- RTM_GETLINK, NLM_F_REQUEST);
- ifi = ofpbuf_put_zeros(&request, sizeof *ifi);
- ifi->ifi_family = PF_UNSPEC;
- ifi->ifi_index = ifindex;
- error = nl_sock_transact(rtnl_sock, &request, &reply);
- ofpbuf_uninit(&request);
- if (error) {
- return error;
- }
-
- if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
- rtnlgrp_link_policy,
- attrs, ARRAY_SIZE(rtnlgrp_link_policy))) {
- ofpbuf_delete(reply);
- return EPROTO;
+ netdev_get_flags(netdev, &flags);
+ if (!(flags & NETDEV_UP)) {
+ return false;
}
- if (!attrs[IFLA_STATS]) {
- VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats");
- ofpbuf_delete(reply);
- return EPROTO;
+ if (!netdev->netdev_class->get_carrier) {
+ return true;
}
- rtnl_stats = nl_attr_get(attrs[IFLA_STATS]);
- stats->rx_packets = rtnl_stats->rx_packets;
- stats->tx_packets = rtnl_stats->tx_packets;
- stats->rx_bytes = rtnl_stats->rx_bytes;
- stats->tx_bytes = rtnl_stats->tx_bytes;
- stats->rx_errors = rtnl_stats->rx_errors;
- stats->tx_errors = rtnl_stats->tx_errors;
- stats->rx_dropped = rtnl_stats->rx_dropped;
- stats->tx_dropped = rtnl_stats->tx_dropped;
- stats->multicast = rtnl_stats->multicast;
- stats->collisions = rtnl_stats->collisions;
- stats->rx_length_errors = rtnl_stats->rx_length_errors;
- stats->rx_over_errors = rtnl_stats->rx_over_errors;
- stats->rx_crc_errors = rtnl_stats->rx_crc_errors;
- stats->rx_frame_errors = rtnl_stats->rx_frame_errors;
- stats->rx_fifo_errors = rtnl_stats->rx_fifo_errors;
- stats->rx_missed_errors = rtnl_stats->rx_missed_errors;
- stats->tx_aborted_errors = rtnl_stats->tx_aborted_errors;
- stats->tx_carrier_errors = rtnl_stats->tx_carrier_errors;
- stats->tx_fifo_errors = rtnl_stats->tx_fifo_errors;
- stats->tx_heartbeat_errors = rtnl_stats->tx_heartbeat_errors;
- stats->tx_window_errors = rtnl_stats->tx_window_errors;
-
- ofpbuf_delete(reply);
-
- return 0;
-}
-
-static int
-get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats)
-{
- static const char fn[] = "/proc/net/dev";
- char line[1024];
- FILE *stream;
- int ln;
-
- stream = fopen(fn, "r");
- if (!stream) {
- VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
- return errno;
+ error = netdev->netdev_class->get_carrier(netdev, &carrier);
+ if (error) {
+ VLOG_DBG("%s: failed to get network device carrier status, assuming "
+ "down: %s", netdev_get_name(netdev), ovs_strerror(error));
+ carrier = false;
}
- ln = 0;
- while (fgets(line, sizeof line, stream)) {
- if (++ln >= 3) {
- char devname[16];
-#define X64 "%"SCNu64
- if (sscanf(line,
- " %15[^:]:"
- X64 X64 X64 X64 X64 X64 X64 "%*u"
- X64 X64 X64 X64 X64 X64 X64 "%*u",
- devname,
- &stats->rx_bytes,
- &stats->rx_packets,
- &stats->rx_errors,
- &stats->rx_dropped,
- &stats->rx_fifo_errors,
- &stats->rx_frame_errors,
- &stats->multicast,
- &stats->tx_bytes,
- &stats->tx_packets,
- &stats->tx_errors,
- &stats->tx_dropped,
- &stats->tx_fifo_errors,
- &stats->collisions,
- &stats->tx_carrier_errors) != 15) {
- VLOG_WARN_RL(&rl, "%s:%d: parse error", fn, ln);
- } else if (!strcmp(devname, netdev_name)) {
- stats->rx_length_errors = UINT64_MAX;
- stats->rx_over_errors = UINT64_MAX;
- stats->rx_crc_errors = UINT64_MAX;
- stats->rx_missed_errors = UINT64_MAX;
- stats->tx_aborted_errors = UINT64_MAX;
- stats->tx_heartbeat_errors = UINT64_MAX;
- stats->tx_window_errors = UINT64_MAX;
- fclose(stream);
- return 0;
- }
- }
- }
- VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name);
- fclose(stream);
- return ENODEV;
+ return carrier;
}
-int
-netdev_get_carrier(const struct netdev *netdev, bool *carrier)
+/* Returns the number of times 'netdev''s carrier has changed. */
+long long int
+netdev_get_carrier_resets(const struct netdev *netdev)
{
- return netdev_nodev_get_carrier(netdev->name, carrier);
+ return (netdev->netdev_class->get_carrier_resets
+ ? netdev->netdev_class->get_carrier_resets(netdev)
+ : 0);
}
+/* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
+ * link status instead of checking 'netdev''s carrier. 'netdev''s MII
+ * registers will be polled once ever 'interval' milliseconds. If 'netdev'
+ * does not support MII, another method may be used as a fallback. If
+ * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
+ * its normal behavior.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. */
int
-netdev_nodev_get_carrier(const char *netdev_name, bool *carrier)
+netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
{
- char line[8];
- int retval;
- int error;
- char *fn;
- int fd;
-
- *carrier = false;
-
- fn = xasprintf("/sys/class/net/%s/carrier", netdev_name);
- fd = open(fn, O_RDONLY);
- if (fd < 0) {
- error = errno;
- VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(error));
- goto exit;
- }
-
- retval = read(fd, line, sizeof line);
- if (retval < 0) {
- error = errno;
- if (error == EINVAL) {
- /* This is the normal return value when we try to check carrier if
- * the network device is not up. */
- } else {
- VLOG_WARN_RL(&rl, "%s: read failed: %s", fn, strerror(error));
- }
- goto exit_close;
- } else if (retval == 0) {
- error = EPROTO;
- VLOG_WARN_RL(&rl, "%s: unexpected end of file", fn);
- goto exit_close;
- }
-
- if (line[0] != '0' && line[0] != '1') {
- error = EPROTO;
- VLOG_WARN_RL(&rl, "%s: value is %c (expected 0 or 1)", fn, line[0]);
- goto exit_close;
- }
- *carrier = line[0] != '0';
- error = 0;
-
-exit_close:
- close(fd);
-exit:
- free(fn);
- return error;
+ return (netdev->netdev_class->set_miimon_interval
+ ? netdev->netdev_class->set_miimon_interval(netdev, interval)
+ : EOPNOTSUPP);
}
+/* Retrieves current device stats for 'netdev'. */
int
netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
{
int error;
COVERAGE_INC(netdev_get_stats);
- if (use_netlink_stats) {
- int ifindex;
-
- error = get_ifindex(netdev, &ifindex);
- if (!error) {
- error = get_stats_via_netlink(ifindex, stats);
- }
- } else {
- error = get_stats_via_proc(netdev->name, stats);
- }
-
+ error = (netdev->netdev_class->get_stats
+ ? netdev->netdev_class->get_stats(netdev, stats)
+ : EOPNOTSUPP);
if (error) {
memset(stats, 0xff, sizeof *stats);
}
return error;
}
-#define POLICE_ADD_CMD "/sbin/tc qdisc add dev %s handle ffff: ingress"
-#define POLICE_CONFIG_CMD "/sbin/tc filter add dev %s parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate %dkbit burst %dk mtu 65535 drop flowid :1"
-/* We redirect stderr to /dev/null because we often want to remove all
- * traffic control configuration on a port so its in a known state. If
- * this done when there is no such configuration, tc complains, so we just
- * always ignore it.
- */
-#define POLICE_DEL_CMD "/sbin/tc qdisc del dev %s handle ffff: ingress 2>/dev/null"
-
-/* Attempts to set input rate limiting (policing) policy. */
+/* Attempts to change the stats for 'netdev' to those provided in 'stats'.
+ * Returns 0 if successful, otherwise a positive errno value.
+ *
+ * This will probably fail for most network devices. Some devices might only
+ * allow setting their stats to 0. */
int
-netdev_nodev_set_policing(const char *netdev_name, uint32_t kbits_rate,
- uint32_t kbits_burst)
+netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
{
- char command[1024];
-
- init_netdev();
-
- COVERAGE_INC(netdev_set_policing);
- if (kbits_rate) {
- if (!kbits_burst) {
- /* Default to 10 kilobits if not specified. */
- kbits_burst = 10;
- }
-
- /* xxx This should be more careful about only adding if it
- * xxx actually exists, as opposed to always deleting it. */
- snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name);
- if (system(command) == -1) {
- VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name);
- }
-
- snprintf(command, sizeof(command), POLICE_ADD_CMD, netdev_name);
- if (system(command) != 0) {
- VLOG_WARN_RL(&rl, "%s: problem adding policing", netdev_name);
- return -1;
- }
-
- snprintf(command, sizeof(command), POLICE_CONFIG_CMD, netdev_name,
- kbits_rate, kbits_burst);
- if (system(command) != 0) {
- VLOG_WARN_RL(&rl, "%s: problem configuring policing",
- netdev_name);
- return -1;
- }
- } else {
- snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name);
- if (system(command) == -1) {
- VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name);
- }
- }
-
- return 0;
+ return (netdev->netdev_class->set_stats
+ ? netdev->netdev_class->set_stats(netdev, stats)
+ : EOPNOTSUPP);
}
+/* Attempts to set input rate limiting (policing) policy, such that up to
+ * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
+ * size of 'kbits' kb. */
int
netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
uint32_t kbits_burst)
{
- return netdev_nodev_set_policing(netdev->name, kbits_rate, kbits_burst);
+ return (netdev->netdev_class->set_policing
+ ? netdev->netdev_class->set_policing(netdev,
+ kbits_rate, kbits_burst)
+ : EOPNOTSUPP);
}
-/* Initializes 'svec' with a list of the names of all known network devices. */
-void
-netdev_enumerate(struct svec *svec)
+/* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
+ * empty if 'netdev' does not support QoS. Any names added to 'types' should
+ * be documented as valid for the "type" column in the "QoS" table in
+ * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * Every network device supports disabling QoS with a type of "", but this type
+ * will not be added to 'types'.
+ *
+ * The caller must initialize 'types' (e.g. with sset_init()) before calling
+ * this function. The caller is responsible for destroying 'types' (e.g. with
+ * sset_destroy()) when it is no longer needed.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. */
+int
+netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
{
- struct if_nameindex *names;
-
- svec_init(svec);
- names = if_nameindex();
- if (names) {
- size_t i;
+ const struct netdev_class *class = netdev->netdev_class;
+ return (class->get_qos_types
+ ? class->get_qos_types(netdev, types)
+ : 0);
+}
- for (i = 0; names[i].if_name != NULL; i++) {
- svec_add(svec, names[i].if_name);
+/* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
+ * which should be "" or one of the types returned by netdev_get_qos_types()
+ * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
+ * On success, initializes 'caps' with the QoS capabilities; on failure, clears
+ * 'caps' to all zeros. */
+int
+netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
+ struct netdev_qos_capabilities *caps)
+{
+ const struct netdev_class *class = netdev->netdev_class;
+
+ if (*type) {
+ int retval = (class->get_qos_capabilities
+ ? class->get_qos_capabilities(netdev, type, caps)
+ : EOPNOTSUPP);
+ if (retval) {
+ memset(caps, 0, sizeof *caps);
}
- if_freenameindex(names);
+ return retval;
} else {
- VLOG_WARN("could not obtain list of network device names: %s",
- strerror(errno));
+ /* Every netdev supports turning off QoS. */
+ memset(caps, 0, sizeof *caps);
+ return 0;
}
}
-/* Attempts to locate a device based on its IPv4 address. The caller
- * may provide a hint as to the device by setting 'netdev_name' to a
- * likely device name. This string must be malloc'd, since if it is
- * not correct then it will be freed. If there is no hint, then
- * 'netdev_name' must be the NULL pointer.
+/* Obtains the number of queues supported by 'netdev' for the specified 'type'
+ * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
+ * the number of queues (zero on failure) in '*n_queuesp'.
*
- * If the device is found, the return value will be true and 'netdev_name'
- * contains the device's name as a string, which the caller is responsible
- * for freeing. If the device is not found, the return value is false. */
-bool
-netdev_find_dev_by_in4(const struct in_addr *in4, char **netdev_name)
+ * This is just a simple wrapper around netdev_get_qos_capabilities(). */
+int
+netdev_get_n_queues(const struct netdev *netdev,
+ const char *type, unsigned int *n_queuesp)
{
- int i;
- struct in_addr dev_in4;
- struct svec dev_list;
+ struct netdev_qos_capabilities caps;
+ int retval;
- /* Check the hint first. */
- if (*netdev_name && (netdev_nodev_get_in4(*netdev_name, &dev_in4, NULL))
- && (dev_in4.s_addr == in4->s_addr)) {
- return true;
- }
+ retval = netdev_get_qos_capabilities(netdev, type, &caps);
+ *n_queuesp = caps.n_queues;
+ return retval;
+}
- free(*netdev_name);
- *netdev_name = NULL;
- netdev_enumerate(&dev_list);
+/* Queries 'netdev' about its currently configured form of QoS. If successful,
+ * stores the name of the current form of QoS into '*typep', stores any details
+ * of configuration as string key-value pairs in 'details', and returns 0. On
+ * failure, sets '*typep' to NULL and returns a positive errno value.
+ *
+ * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
+ *
+ * The caller must initialize 'details' as an empty smap (e.g. with
+ * smap_init()) before calling this function. The caller must free 'details'
+ * when it is no longer needed (e.g. with smap_destroy()).
+ *
+ * The caller must not modify or free '*typep'.
+ *
+ * '*typep' will be one of the types returned by netdev_get_qos_types() for
+ * 'netdev'. The contents of 'details' should be documented as valid for
+ * '*typep' in the "other_config" column in the "QoS" table in
+ * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
+int
+netdev_get_qos(const struct netdev *netdev,
+ const char **typep, struct smap *details)
+{
+ const struct netdev_class *class = netdev->netdev_class;
+ int retval;
- for (i=0; i<dev_list.n; i++) {
- if ((netdev_nodev_get_in4(dev_list.names[i], &dev_in4, NULL))
- && (dev_in4.s_addr == in4->s_addr)) {
- *netdev_name = xstrdup(dev_list.names[i]);
- svec_destroy(&dev_list);
- return true;
+ if (class->get_qos) {
+ retval = class->get_qos(netdev, typep, details);
+ if (retval) {
+ *typep = NULL;
+ smap_clear(details);
}
+ return retval;
+ } else {
+ /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
+ *typep = "";
+ return 0;
}
-
- svec_destroy(&dev_list);
- return false;
}
-/* Looks up the next hop for 'ip'. If the next hop can be found, the
- * address is stored in 'next_hop'. If a gateway is not required to
- * reach 'ip', zero is stored in 'next_hop'. In either case, zero is
- * returned and a copy of the name of the device to reach 'ip' is stored
- * in 'netdev_name', which the caller is responsible for freeing. If a
- * route could not be determined, a positive errno is returned. */
+/* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
+ * with details of configuration from 'details'. Returns 0 if successful,
+ * otherwise a positive errno value. On error, the previous QoS configuration
+ * is retained.
+ *
+ * When this function changes the type of QoS (not just 'details'), this also
+ * resets all queue configuration for 'netdev' to their defaults (which depend
+ * on the specific type of QoS). Otherwise, the queue configuration for
+ * 'netdev' is unchanged.
+ *
+ * 'type' should be "" (to disable QoS) or one of the types returned by
+ * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
+ * documented as valid for the given 'type' in the "other_config" column in the
+ * "QoS" table in vswitchd/vswitch.xml (which is built as
+ * ovs-vswitchd.conf.db(8)).
+ *
+ * NULL may be specified for 'details' if there are no configuration
+ * details. */
int
-netdev_get_next_hop(const struct in_addr *host, struct in_addr *next_hop,
- char **netdev_name)
-{
- static const char fn[] = "/proc/net/route";
- FILE *stream;
- char line[256];
- int ln;
-
- *netdev_name = NULL;
- stream = fopen(fn, "r");
- if (stream == NULL) {
- VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
- return errno;
- }
+netdev_set_qos(struct netdev *netdev,
+ const char *type, const struct smap *details)
+{
+ const struct netdev_class *class = netdev->netdev_class;
- ln = 0;
- while (fgets(line, sizeof line, stream)) {
- if (++ln >= 2) {
- char iface[17];
- uint32_t dest, gateway, mask;
- int refcnt, metric, mtu;
- unsigned int flags, use, window, irtt;
-
- if (sscanf(line,
- "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32
- " %d %u %u\n",
- iface, &dest, &gateway, &flags, &refcnt,
- &use, &metric, &mask, &mtu, &window, &irtt) != 11) {
-
- VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s",
- fn, ln, line);
- continue;
- }
- if (!(flags & RTF_UP)) {
- /* Skip routes that aren't up. */
- continue;
- }
+ if (!type) {
+ type = "";
+ }
- /* The output of 'dest', 'mask', and 'gateway' were given in
- * network byte order, so we don't need need any endian
- * conversions here. */
- if ((dest & mask) == (host->s_addr & mask)) {
- if (!gateway) {
- /* The host is directly reachable. */
- next_hop->s_addr = 0;
- } else {
- /* To reach the host, we must go through a gateway. */
- next_hop->s_addr = gateway;
- }
- *netdev_name = xstrdup(iface);
- fclose(stream);
- return 0;
- }
+ if (class->set_qos) {
+ if (!details) {
+ static const struct smap empty = SMAP_INITIALIZER(&empty);
+ details = ∅
}
+ return class->set_qos(netdev, type, details);
+ } else {
+ return *type ? EOPNOTSUPP : 0;
}
-
- fclose(stream);
- return ENXIO;
}
-/* Obtains the current flags for the network device named 'netdev_name' and
- * stores them into '*flagsp'. Returns 0 if successful, otherwise a positive
- * errno value. On error, stores 0 into '*flagsp'.
+/* Queries 'netdev' for information about the queue numbered 'queue_id'. If
+ * successful, adds that information as string key-value pairs to 'details'.
+ * Returns 0 if successful, otherwise a positive errno value.
+ *
+ * 'queue_id' must be less than the number of queues supported by 'netdev' for
+ * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
*
- * If only device flags are needed, this is more efficient than calling
- * netdev_open(), netdev_get_flags(), netdev_close(). */
+ * The returned contents of 'details' should be documented as valid for the
+ * given 'type' in the "other_config" column in the "Queue" table in
+ * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * The caller must initialize 'details' (e.g. with smap_init()) before calling
+ * this function. The caller must free 'details' when it is no longer needed
+ * (e.g. with smap_destroy()). */
int
-netdev_nodev_get_flags(const char *netdev_name, enum netdev_flags *flagsp)
+netdev_get_queue(const struct netdev *netdev,
+ unsigned int queue_id, struct smap *details)
{
- int error, flags;
-
- init_netdev();
-
- *flagsp = 0;
- error = get_flags(netdev_name, &flags);
- if (error) {
- return error;
- }
+ const struct netdev_class *class = netdev->netdev_class;
+ int retval;
- if (flags & IFF_UP) {
- *flagsp |= NETDEV_UP;
- }
- if (flags & IFF_PROMISC) {
- *flagsp |= NETDEV_PROMISC;
+ retval = (class->get_queue
+ ? class->get_queue(netdev, queue_id, details)
+ : EOPNOTSUPP);
+ if (retval) {
+ smap_clear(details);
}
- return 0;
+ return retval;
}
+/* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
+ * string pairs in 'details'. The contents of 'details' should be documented
+ * as valid for the given 'type' in the "other_config" column in the "Queue"
+ * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
+ * Returns 0 if successful, otherwise a positive errno value. On failure, the
+ * given queue's configuration should be unmodified.
+ *
+ * 'queue_id' must be less than the number of queues supported by 'netdev' for
+ * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
+ *
+ * This function does not modify 'details', and the caller retains ownership of
+ * it. */
int
-netdev_nodev_get_etheraddr(const char *netdev_name, uint8_t mac[6])
+netdev_set_queue(struct netdev *netdev,
+ unsigned int queue_id, const struct smap *details)
{
- init_netdev();
+ const struct netdev_class *class = netdev->netdev_class;
+ return (class->set_queue
+ ? class->set_queue(netdev, queue_id, details)
+ : EOPNOTSUPP);
+}
- return get_etheraddr(netdev_name, mac, NULL);
+/* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
+ * of QoS may have a fixed set of queues, in which case attempts to delete them
+ * will fail with EOPNOTSUPP.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. On failure, the
+ * given queue will be unmodified.
+ *
+ * 'queue_id' must be less than the number of queues supported by 'netdev' for
+ * the current form of QoS (e.g. as returned by
+ * netdev_get_n_queues(netdev)). */
+int
+netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
+{
+ const struct netdev_class *class = netdev->netdev_class;
+ return (class->delete_queue
+ ? class->delete_queue(netdev, queue_id)
+ : EOPNOTSUPP);
}
-/* If 'netdev_name' is the name of a VLAN network device (e.g. one created with
- * vconfig(8)), sets '*vlan_vid' to the VLAN VID associated with that device
- * and returns 0. Otherwise returns a errno value (specifically ENOENT if
- * 'netdev_name' is the name of a network device that is not a VLAN device) and
- * sets '*vlan_vid' to -1. */
+/* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
+ * fills 'stats' with the queue's statistics; individual members of 'stats' may
+ * be set to all-1-bits if the statistic is unavailable. On failure, returns a
+ * positive errno value and fills 'stats' with values indicating unsupported
+ * statistics. */
int
-netdev_get_vlan_vid(const char *netdev_name, int *vlan_vid)
+netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
+ struct netdev_queue_stats *stats)
{
- struct ds line = DS_EMPTY_INITIALIZER;
- FILE *stream = NULL;
- int error;
- char *fn;
-
- COVERAGE_INC(netdev_get_vlan_vid);
- fn = xasprintf("/proc/net/vlan/%s", netdev_name);
- stream = fopen(fn, "r");
- if (!stream) {
- error = errno;
- goto done;
- }
+ const struct netdev_class *class = netdev->netdev_class;
+ int retval;
- if (ds_get_line(&line, stream)) {
- if (ferror(stream)) {
- error = errno;
- VLOG_ERR_RL(&rl, "error reading \"%s\": %s", fn, strerror(errno));
- } else {
- error = EPROTO;
- VLOG_ERR_RL(&rl, "unexpected end of file reading \"%s\"", fn);
- }
- goto done;
+ retval = (class->get_queue_stats
+ ? class->get_queue_stats(netdev, queue_id, stats)
+ : EOPNOTSUPP);
+ if (retval) {
+ stats->tx_bytes = UINT64_MAX;
+ stats->tx_packets = UINT64_MAX;
+ stats->tx_errors = UINT64_MAX;
+ stats->created = LLONG_MIN;
}
+ return retval;
+}
- if (!sscanf(ds_cstr(&line), "%*s VID: %d", vlan_vid)) {
- error = EPROTO;
- VLOG_ERR_RL(&rl, "parse error reading \"%s\" line 1: \"%s\"",
- fn, ds_cstr(&line));
- goto done;
+/* Initializes 'dump' to begin dumping the queues in a netdev.
+ *
+ * This function provides no status indication. An error status for the entire
+ * dump operation is provided when it is completed by calling
+ * netdev_queue_dump_done().
+ */
+void
+netdev_queue_dump_start(struct netdev_queue_dump *dump,
+ const struct netdev *netdev)
+{
+ dump->netdev = netdev_ref(netdev);
+ if (netdev->netdev_class->queue_dump_start) {
+ dump->error = netdev->netdev_class->queue_dump_start(netdev,
+ &dump->state);
+ } else {
+ dump->error = EOPNOTSUPP;
}
+}
- error = 0;
+/* Attempts to retrieve another queue from 'dump', which must have been
+ * initialized with netdev_queue_dump_start(). On success, stores a new queue
+ * ID into '*queue_id', fills 'details' with configuration details for the
+ * queue, and returns true. On failure, returns false.
+ *
+ * Queues are not necessarily dumped in increasing order of queue ID (or any
+ * other predictable order).
+ *
+ * Failure might indicate an actual error or merely that the last queue has
+ * been dumped. An error status for the entire dump operation is provided when
+ * it is completed by calling netdev_queue_dump_done().
+ *
+ * The returned contents of 'details' should be documented as valid for the
+ * given 'type' in the "other_config" column in the "Queue" table in
+ * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * The caller must initialize 'details' (e.g. with smap_init()) before calling
+ * this function. This function will clear and replace its contents. The
+ * caller must free 'details' when it is no longer needed (e.g. with
+ * smap_destroy()). */
+bool
+netdev_queue_dump_next(struct netdev_queue_dump *dump,
+ unsigned int *queue_id, struct smap *details)
+{
+ const struct netdev *netdev = dump->netdev;
-done:
- free(fn);
- if (stream) {
- fclose(stream);
+ if (dump->error) {
+ return false;
}
- ds_destroy(&line);
- if (error) {
- *vlan_vid = -1;
+
+ dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
+ queue_id, details);
+
+ if (dump->error) {
+ netdev->netdev_class->queue_dump_done(netdev, dump->state);
+ return false;
}
- return error;
+ return true;
}
-\f
-static void restore_all_flags(void *aux);
-/* Set up a signal hook to restore network device flags on program
- * termination. */
-static void
-init_netdev(void)
+/* Completes queue table dump operation 'dump', which must have been
+ * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
+ * was error-free, otherwise a positive errno value describing the problem. */
+int
+netdev_queue_dump_done(struct netdev_queue_dump *dump)
{
- static bool inited;
- if (!inited) {
- int ifindex;
- int error;
+ const struct netdev *netdev = dump->netdev;
+ if (!dump->error && netdev->netdev_class->queue_dump_done) {
+ dump->error = netdev->netdev_class->queue_dump_done(netdev,
+ dump->state);
+ }
+ netdev_close(dump->netdev);
+ return dump->error == EOF ? 0 : dump->error;
+}
- inited = true;
+/* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
+ * its statistics, and the 'aux' specified by the caller. The order of
+ * iteration is unspecified, but (when successful) each queue is visited
+ * exactly once.
+ *
+ * Calling this function may be more efficient than calling
+ * netdev_get_queue_stats() for every queue.
+ *
+ * 'cb' must not modify or free the statistics passed in.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. On error, some
+ * configured queues may not have been included in the iteration. */
+int
+netdev_dump_queue_stats(const struct netdev *netdev,
+ netdev_dump_queue_stats_cb *cb, void *aux)
+{
+ const struct netdev_class *class = netdev->netdev_class;
+ return (class->dump_queue_stats
+ ? class->dump_queue_stats(netdev, cb, aux)
+ : EOPNOTSUPP);
+}
- fatal_signal_add_hook(restore_all_flags, NULL, true);
+\f
+/* Returns the class type of 'netdev'.
+ *
+ * The caller must not free the returned value. */
+const char *
+netdev_get_type(const struct netdev *netdev)
+{
+ return netdev->netdev_class->type;
+}
- af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
- if (af_inet_sock < 0) {
- ovs_fatal(errno, "socket(AF_INET)");
- }
+/* Returns the class associated with 'netdev'. */
+const struct netdev_class *
+netdev_get_class(const struct netdev *netdev)
+{
+ return netdev->netdev_class;
+}
- error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &rtnl_sock);
- if (error) {
- ovs_fatal(error, "socket(AF_NETLINK, NETLINK_ROUTE)");
- }
+/* Returns the netdev with 'name' or NULL if there is none.
+ *
+ * The caller must free the returned netdev with netdev_close(). */
+struct netdev *
+netdev_from_name(const char *name)
+ OVS_EXCLUDED(netdev_mutex)
+{
+ struct netdev *netdev;
- /* Decide on the netdev_get_stats() implementation to use. Netlink is
- * preferable, so if that works, we'll use it. */
- ifindex = do_get_ifindex("lo");
- if (ifindex < 0) {
- VLOG_WARN("failed to get ifindex for lo, "
- "obtaining netdev stats from proc");
- use_netlink_stats = false;
- } else {
- struct netdev_stats stats;
- error = get_stats_via_netlink(ifindex, &stats);
- if (!error) {
- VLOG_DBG("obtaining netdev stats via rtnetlink");
- use_netlink_stats = true;
- } else {
- VLOG_INFO("RTM_GETLINK failed (%s), obtaining netdev stats "
- "via proc (you are probably running a pre-2.6.19 "
- "kernel)", strerror(error));
- use_netlink_stats = false;
- }
- }
+ ovs_mutex_lock(&netdev_mutex);
+ netdev = shash_find_data(&netdev_shash, name);
+ if (netdev) {
+ netdev->ref_cnt++;
}
+ ovs_mutex_unlock(&netdev_mutex);
+
+ return netdev;
}
-/* Restore the network device flags on 'netdev' to those that were active
- * before we changed them. Returns 0 if successful, otherwise a positive
- * errno value.
+/* Fills 'device_list' with devices that match 'netdev_class'.
*
- * To avoid reentry, the caller must ensure that fatal signals are blocked. */
-static int
-restore_flags(struct netdev *netdev)
+ * The caller is responsible for initializing and destroying 'device_list' and
+ * must close each device on the list. */
+void
+netdev_get_devices(const struct netdev_class *netdev_class,
+ struct shash *device_list)
+ OVS_EXCLUDED(netdev_mutex)
{
- struct ifreq ifr;
- int restore_flags;
+ struct shash_node *node;
- /* Get current flags. */
- strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
- COVERAGE_INC(netdev_get_flags);
- if (ioctl(netdev->netdev_fd, SIOCGIFFLAGS, &ifr) < 0) {
- return errno;
- }
+ ovs_mutex_lock(&netdev_mutex);
+ SHASH_FOR_EACH (node, &netdev_shash) {
+ struct netdev *dev = node->data;
- /* Restore flags that we might have changed, if necessary. */
- restore_flags = netdev->changed_flags & (IFF_PROMISC | IFF_UP);
- if ((ifr.ifr_flags ^ netdev->save_flags) & restore_flags) {
- ifr.ifr_flags &= ~restore_flags;
- ifr.ifr_flags |= netdev->save_flags & restore_flags;
- COVERAGE_INC(netdev_set_flags);
- if (ioctl(netdev->netdev_fd, SIOCSIFFLAGS, &ifr) < 0) {
- return errno;
+ if (dev->netdev_class == netdev_class) {
+ dev->ref_cnt++;
+ shash_add(device_list, node->name, node->data);
}
}
-
- return 0;
+ ovs_mutex_unlock(&netdev_mutex);
}
-/* Retores all the flags on all network devices that we modified. Called from
- * a signal handler, so it does not attempt to report error conditions. */
-static void
-restore_all_flags(void *aux UNUSED)
+const char *
+netdev_get_type_from_name(const char *name)
{
- struct netdev *netdev;
- LIST_FOR_EACH (netdev, struct netdev, node, &netdev_list) {
- restore_flags(netdev);
- }
-}
-
-static int
-get_flags(const char *netdev_name, int *flags)
-{
- struct ifreq ifr;
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- COVERAGE_INC(netdev_get_flags);
- if (ioctl(af_inet_sock, SIOCGIFFLAGS, &ifr) < 0) {
- VLOG_ERR("ioctl(SIOCGIFFLAGS) on %s device failed: %s",
- netdev_name, strerror(errno));
- return errno;
- }
- *flags = ifr.ifr_flags;
- return 0;
+ struct netdev *dev = netdev_from_name(name);
+ const char *type = dev ? netdev_get_type(dev) : NULL;
+ netdev_close(dev);
+ return type;
}
-
-static int
-set_flags(const char *netdev_name, int flags)
-{
- struct ifreq ifr;
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- ifr.ifr_flags = flags;
- COVERAGE_INC(netdev_set_flags);
- if (ioctl(af_inet_sock, SIOCSIFFLAGS, &ifr) < 0) {
- VLOG_ERR("ioctl(SIOCSIFFLAGS) on %s device failed: %s",
- netdev_name, strerror(errno));
- return errno;
- }
- return 0;
+\f
+struct netdev *
+netdev_rxq_get_netdev(const struct netdev_rxq *rx)
+{
+ ovs_assert(rx->netdev->ref_cnt > 0);
+ return rx->netdev;
}
-static int
-do_get_ifindex(const char *netdev_name)
+const char *
+netdev_rxq_get_name(const struct netdev_rxq *rx)
{
- struct ifreq ifr;
-
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- COVERAGE_INC(netdev_get_ifindex);
- if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
- VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
- netdev_name, strerror(errno));
- return -errno;
- }
- return ifr.ifr_ifindex;
+ return netdev_get_name(netdev_rxq_get_netdev(rx));
}
-static int
-get_ifindex(const struct netdev *netdev, int *ifindexp)
+static void
+restore_all_flags(void *aux OVS_UNUSED)
{
- *ifindexp = 0;
- if (netdev->ifindex < 0) {
- int ifindex = do_get_ifindex(netdev->name);
- if (ifindex < 0) {
- return -ifindex;
+ struct shash_node *node;
+
+ SHASH_FOR_EACH (node, &netdev_shash) {
+ struct netdev *netdev = node->data;
+ const struct netdev_saved_flags *sf;
+ enum netdev_flags saved_values;
+ enum netdev_flags saved_flags;
+
+ saved_values = saved_flags = 0;
+ LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
+ saved_flags |= sf->saved_flags;
+ saved_values &= ~sf->saved_flags;
+ saved_values |= sf->saved_flags & sf->saved_values;
}
- ((struct netdev *) netdev)->ifindex = ifindex;
- }
- *ifindexp = netdev->ifindex;
- return 0;
-}
+ if (saved_flags) {
+ enum netdev_flags old_flags;
-static int
-get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN],
- int *hwaddr_familyp)
-{
- struct ifreq ifr;
-
- memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- COVERAGE_INC(netdev_get_hwaddr);
- if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) {
- VLOG_ERR("ioctl(SIOCGIFHWADDR) on %s device failed: %s",
- netdev_name, strerror(errno));
- return errno;
- }
- if (hwaddr_familyp) {
- int hwaddr_family = ifr.ifr_hwaddr.sa_family;
- *hwaddr_familyp = hwaddr_family;
- if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) {
- VLOG_WARN("%s device has unknown hardware address family %d",
- netdev_name, hwaddr_family);
+ netdev->netdev_class->update_flags(netdev,
+ saved_flags & saved_values,
+ saved_flags & ~saved_values,
+ &old_flags);
}
}
- memcpy(ea, ifr.ifr_hwaddr.sa_data, ETH_ADDR_LEN);
- return 0;
}
-static int
-set_etheraddr(const char *netdev_name, int hwaddr_family,
- const uint8_t mac[ETH_ADDR_LEN])
-{
- struct ifreq ifr;
-
- memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- ifr.ifr_hwaddr.sa_family = hwaddr_family;
- memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
- COVERAGE_INC(netdev_set_hwaddr);
- if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) {
- VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s",
- netdev_name, strerror(errno));
- return errno;
- }
- return 0;
+uint64_t
+netdev_get_change_seq(const struct netdev *netdev)
+{
+ return netdev->change_seq;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff