/*
- * Copyright (c) 2009, 2010 Nicira Networks.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*/
#include <config.h>
-#include <assert.h>
+
+#include "netdev-linux.h"
+
#include <errno.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include <inttypes.h>
+#include <linux/filter.h>
+#include <linux/gen_stats.h>
+#include <linux/if_ether.h>
#include <linux/if_tun.h>
-#include <linux/ip.h>
#include <linux/types.h>
#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/pkt_cls.h>
+#include <linux/pkt_sched.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 <linux/if_tunnel.h>
#include <net/if_arp.h>
#include <net/if_packet.h>
#include <net/route.h>
#include <unistd.h>
#include "coverage.h"
+#include "dpif-linux.h"
+#include "dpif-netdev.h"
#include "dynamic-string.h"
#include "fatal-signal.h"
+#include "hash.h"
+#include "hmap.h"
#include "netdev-provider.h"
+#include "netdev-vport.h"
+#include "netlink-notifier.h"
+#include "netlink-socket.h"
#include "netlink.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
-#include "openvswitch/gre.h"
+#include "ovs-atomic.h"
#include "packets.h"
#include "poll-loop.h"
-#include "rtnetlink.h"
-#include "socket-util.h"
+#include "rtnetlink-link.h"
#include "shash.h"
-#include "svec.h"
+#include "socket-util.h"
+#include "sset.h"
+#include "timer.h"
+#include "unaligned.h"
+#include "vlog.h"
-#ifndef GRE_IOCTL_ONLY
-#include <linux/if_link.h>
-#endif
+VLOG_DEFINE_THIS_MODULE(netdev_linux);
+
+COVERAGE_DEFINE(netdev_set_policing);
+COVERAGE_DEFINE(netdev_arp_lookup);
+COVERAGE_DEFINE(netdev_get_ifindex);
+COVERAGE_DEFINE(netdev_get_hwaddr);
+COVERAGE_DEFINE(netdev_set_hwaddr);
+COVERAGE_DEFINE(netdev_get_ethtool);
+COVERAGE_DEFINE(netdev_set_ethtool);
-#define THIS_MODULE VLM_netdev_linux
-#include "vlog.h"
\f
/* These were introduced in Linux 2.6.14, so they might be missing if we have
* old headers. */
#define ADVERTISED_Asym_Pause (1 << 14)
#endif
-static struct rtnetlink_notifier netdev_linux_cache_notifier;
-static int cache_notifier_refcount;
+/* These were introduced in Linux 2.6.24, so they might be missing if we
+ * have old headers. */
+#ifndef ETHTOOL_GFLAGS
+#define ETHTOOL_GFLAGS 0x00000025 /* Get flags bitmap(ethtool_value) */
+#endif
+#ifndef ETHTOOL_SFLAGS
+#define ETHTOOL_SFLAGS 0x00000026 /* Set flags bitmap(ethtool_value) */
+#endif
+
+/* This was introduced in Linux 2.6.25, so it might be missing if we have old
+ * headers. */
+#ifndef TC_RTAB_SIZE
+#define TC_RTAB_SIZE 1024
+#endif
+
+/* Linux 2.6.21 introduced struct tpacket_auxdata.
+ * Linux 2.6.27 added the tp_vlan_tci member.
+ * Linux 3.0 defined TP_STATUS_VLAN_VALID.
+ * Linux 3.13 repurposed a padding member for tp_vlan_tpid and defined
+ * TP_STATUS_VLAN_TPID_VALID.
+ *
+ * With all this churn it's easiest to unconditionally define a replacement
+ * structure that has everything we want.
+ */
+#ifndef PACKET_AUXDATA
+#define PACKET_AUXDATA 8
+#endif
+#ifndef TP_STATUS_VLAN_VALID
+#define TP_STATUS_VLAN_VALID (1 << 4)
+#endif
+#ifndef TP_STATUS_VLAN_TPID_VALID
+#define TP_STATUS_VLAN_TPID_VALID (1 << 6)
+#endif
+#undef tpacket_auxdata
+#define tpacket_auxdata rpl_tpacket_auxdata
+struct tpacket_auxdata {
+ uint32_t tp_status;
+ uint32_t tp_len;
+ uint32_t tp_snaplen;
+ uint16_t tp_mac;
+ uint16_t tp_net;
+ uint16_t tp_vlan_tci;
+ uint16_t tp_vlan_tpid;
+};
enum {
- VALID_IFINDEX = 1 << 0,
- VALID_ETHERADDR = 1 << 1,
- VALID_IN4 = 1 << 2,
- VALID_IN6 = 1 << 3,
- VALID_MTU = 1 << 4,
- VALID_CARRIER = 1 << 5,
- VALID_IS_INTERNAL = 1 << 6
+ VALID_IFINDEX = 1 << 0,
+ VALID_ETHERADDR = 1 << 1,
+ VALID_IN4 = 1 << 2,
+ VALID_IN6 = 1 << 3,
+ VALID_MTU = 1 << 4,
+ VALID_POLICING = 1 << 5,
+ VALID_VPORT_STAT_ERROR = 1 << 6,
+ VALID_DRVINFO = 1 << 7,
+ VALID_FEATURES = 1 << 8,
+};
+\f
+/* Traffic control. */
+
+/* An instance of a traffic control class. Always associated with a particular
+ * network device.
+ *
+ * Each TC implementation subclasses this with whatever additional data it
+ * needs. */
+struct tc {
+ const struct tc_ops *ops;
+ struct hmap queues; /* Contains "struct tc_queue"s.
+ * Read by generic TC layer.
+ * Written only by TC implementation. */
};
-struct tap_state {
- int fd;
+#define TC_INITIALIZER(TC, OPS) { OPS, HMAP_INITIALIZER(&(TC)->queues) }
+
+/* One traffic control queue.
+ *
+ * Each TC implementation subclasses this with whatever additional data it
+ * needs. */
+struct tc_queue {
+ struct hmap_node hmap_node; /* In struct tc's "queues" hmap. */
+ unsigned int queue_id; /* OpenFlow queue ID. */
+ long long int created; /* Time queue was created, in msecs. */
+};
+
+/* A particular kind of traffic control. Each implementation generally maps to
+ * one particular Linux qdisc class.
+ *
+ * The functions below return 0 if successful or a positive errno value on
+ * failure, except where otherwise noted. All of them must be provided, except
+ * where otherwise noted. */
+struct tc_ops {
+ /* Name used by kernel in the TCA_KIND attribute of tcmsg, e.g. "htb".
+ * This is null for tc_ops_default and tc_ops_other, for which there are no
+ * appropriate values. */
+ const char *linux_name;
+
+ /* Name used in OVS database, e.g. "linux-htb". Must be nonnull. */
+ const char *ovs_name;
+
+ /* Number of supported OpenFlow queues, 0 for qdiscs that have no
+ * queues. The queues are numbered 0 through n_queues - 1. */
+ unsigned int n_queues;
+
+ /* Called to install this TC class on 'netdev'. The implementation should
+ * make the Netlink calls required to set up 'netdev' with the right qdisc
+ * and configure it according to 'details'. The implementation may assume
+ * that the current qdisc is the default; that is, there is no need for it
+ * to delete the current qdisc before installing itself.
+ *
+ * The contents of 'details' should be documented as valid for 'ovs_name'
+ * in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml
+ * (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * This function must return 0 if and only if it sets 'netdev->tc' to an
+ * initialized 'struct tc'.
+ *
+ * (This function is null for tc_ops_other, which cannot be installed. For
+ * other TC classes it should always be nonnull.) */
+ int (*tc_install)(struct netdev *netdev, const struct smap *details);
+
+ /* Called when the netdev code determines (through a Netlink query) that
+ * this TC class's qdisc is installed on 'netdev', but we didn't install
+ * it ourselves and so don't know any of the details.
+ *
+ * 'nlmsg' is the kernel reply to a RTM_GETQDISC Netlink message for
+ * 'netdev'. The TCA_KIND attribute of 'nlmsg' is 'linux_name'. The
+ * implementation should parse the other attributes of 'nlmsg' as
+ * necessary to determine its configuration. If necessary it should also
+ * use Netlink queries to determine the configuration of queues on
+ * 'netdev'.
+ *
+ * This function must return 0 if and only if it sets 'netdev->tc' to an
+ * initialized 'struct tc'. */
+ int (*tc_load)(struct netdev *netdev, struct ofpbuf *nlmsg);
+
+ /* Destroys the data structures allocated by the implementation as part of
+ * 'tc'. (This includes destroying 'tc->queues' by calling
+ * tc_destroy(tc).
+ *
+ * The implementation should not need to perform any Netlink calls. If
+ * desirable, the caller is responsible for deconfiguring the kernel qdisc.
+ * (But it may not be desirable.)
+ *
+ * This function may be null if 'tc' is trivial. */
+ void (*tc_destroy)(struct tc *tc);
+
+ /* Retrieves details of 'netdev->tc' configuration into 'details'.
+ *
+ * The implementation should not need to perform any Netlink calls, because
+ * the 'tc_install' or 'tc_load' that instantiated 'netdev->tc' should have
+ * cached the configuration.
+ *
+ * The contents of 'details' should be documented as valid for 'ovs_name'
+ * in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml
+ * (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * This function may be null if 'tc' is not configurable.
+ */
+ int (*qdisc_get)(const struct netdev *netdev, struct smap *details);
+
+ /* Reconfigures 'netdev->tc' according to 'details', performing any
+ * required Netlink calls to complete the reconfiguration.
+ *
+ * The contents of 'details' should be documented as valid for 'ovs_name'
+ * in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml
+ * (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * This function may be null if 'tc' is not configurable.
+ */
+ int (*qdisc_set)(struct netdev *, const struct smap *details);
+
+ /* Retrieves details of 'queue' on 'netdev->tc' into 'details'. 'queue' is
+ * one of the 'struct tc_queue's within 'netdev->tc->queues'.
+ *
+ * The contents of 'details' should be documented as valid for 'ovs_name'
+ * in the "other_config" column in the "Queue" table in
+ * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * The implementation should not need to perform any Netlink calls, because
+ * the 'tc_install' or 'tc_load' that instantiated 'netdev->tc' should have
+ * cached the queue configuration.
+ *
+ * This function may be null if 'tc' does not have queues ('n_queues' is
+ * 0). */
+ int (*class_get)(const struct netdev *netdev, const struct tc_queue *queue,
+ struct smap *details);
+
+ /* Configures or reconfigures 'queue_id' on 'netdev->tc' according to
+ * 'details', perfoming any required Netlink calls to complete the
+ * reconfiguration. The caller ensures that 'queue_id' is less than
+ * 'n_queues'.
+ *
+ * The contents of 'details' should be documented as valid for 'ovs_name'
+ * in the "other_config" column in the "Queue" table in
+ * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
+ *
+ * This function may be null if 'tc' does not have queues or its queues are
+ * not configurable. */
+ int (*class_set)(struct netdev *, unsigned int queue_id,
+ const struct smap *details);
+
+ /* Deletes 'queue' from 'netdev->tc'. 'queue' is one of the 'struct
+ * tc_queue's within 'netdev->tc->queues'.
+ *
+ * This function may be null if 'tc' does not have queues or its queues
+ * cannot be deleted. */
+ int (*class_delete)(struct netdev *, struct tc_queue *queue);
+
+ /* Obtains stats for 'queue' from 'netdev->tc'. 'queue' is one of the
+ * 'struct tc_queue's within 'netdev->tc->queues'.
+ *
+ * On success, initializes '*stats'.
+ *
+ * This function may be null if 'tc' does not have queues or if it cannot
+ * report queue statistics. */
+ int (*class_get_stats)(const struct netdev *netdev,
+ const struct tc_queue *queue,
+ struct netdev_queue_stats *stats);
+
+ /* Extracts queue stats from 'nlmsg', which is a response to a
+ * RTM_GETTCLASS message, and passes them to 'cb' along with 'aux'.
+ *
+ * This function may be null if 'tc' does not have queues or if it cannot
+ * report queue statistics. */
+ int (*class_dump_stats)(const struct netdev *netdev,
+ const struct ofpbuf *nlmsg,
+ netdev_dump_queue_stats_cb *cb, void *aux);
+};
+
+static void
+tc_init(struct tc *tc, const struct tc_ops *ops)
+{
+ tc->ops = ops;
+ hmap_init(&tc->queues);
+}
+
+static void
+tc_destroy(struct tc *tc)
+{
+ hmap_destroy(&tc->queues);
+}
+
+static const struct tc_ops tc_ops_htb;
+static const struct tc_ops tc_ops_hfsc;
+static const struct tc_ops tc_ops_default;
+static const struct tc_ops tc_ops_other;
+
+static const struct tc_ops *const tcs[] = {
+ &tc_ops_htb, /* Hierarchy token bucket (see tc-htb(8)). */
+ &tc_ops_hfsc, /* Hierarchical fair service curve. */
+ &tc_ops_default, /* Default qdisc (see tc-pfifo_fast(8)). */
+ &tc_ops_other, /* Some other qdisc. */
+ NULL
};
-struct netdev_dev_linux {
- struct netdev_dev netdev_dev;
+static unsigned int tc_make_handle(unsigned int major, unsigned int minor);
+static unsigned int tc_get_major(unsigned int handle);
+static unsigned int tc_get_minor(unsigned int handle);
+
+static unsigned int tc_ticks_to_bytes(unsigned int rate, unsigned int ticks);
+static unsigned int tc_bytes_to_ticks(unsigned int rate, unsigned int size);
+static unsigned int tc_buffer_per_jiffy(unsigned int rate);
+
+static struct tcmsg *tc_make_request(const struct netdev *, int type,
+ unsigned int flags, struct ofpbuf *);
+static int tc_transact(struct ofpbuf *request, struct ofpbuf **replyp);
+static int tc_add_del_ingress_qdisc(struct netdev *netdev, bool add);
+static int tc_add_policer(struct netdev *netdev, int kbits_rate,
+ int kbits_burst);
+
+static int tc_parse_qdisc(const struct ofpbuf *, const char **kind,
+ struct nlattr **options);
+static int tc_parse_class(const struct ofpbuf *, unsigned int *queue_id,
+ struct nlattr **options,
+ struct netdev_queue_stats *);
+static int tc_query_class(const struct netdev *,
+ unsigned int handle, unsigned int parent,
+ struct ofpbuf **replyp);
+static int tc_delete_class(const struct netdev *, unsigned int handle);
+
+static int tc_del_qdisc(struct netdev *netdev);
+static int tc_query_qdisc(const struct netdev *netdev);
+
+static int tc_calc_cell_log(unsigned int mtu);
+static void tc_fill_rate(struct tc_ratespec *rate, uint64_t bps, int mtu);
+static void tc_put_rtab(struct ofpbuf *, uint16_t type,
+ const struct tc_ratespec *rate);
+static int tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes);
+\f
+struct netdev_linux {
+ struct netdev up;
+
+ /* Protects all members below. */
+ struct ovs_mutex mutex;
- struct shash_node *shash_node;
unsigned int cache_valid;
+ bool miimon; /* Link status of last poll. */
+ long long int miimon_interval; /* Miimon Poll rate. Disabled if <= 0. */
+ struct timer miimon_timer;
+
+ /* The following are figured out "on demand" only. They are only valid
+ * when the corresponding VALID_* bit in 'cache_valid' is set. */
int ifindex;
uint8_t etheraddr[ETH_ADDR_LEN];
struct in_addr address, netmask;
struct in6_addr in6;
int mtu;
- int carrier;
- bool is_internal;
-
- union {
- struct tap_state tap;
- } state;
+ unsigned int ifi_flags;
+ long long int carrier_resets;
+ uint32_t kbits_rate; /* Policing data. */
+ uint32_t kbits_burst;
+ int vport_stats_error; /* Cached error code from vport_get_stats().
+ 0 or an errno value. */
+ int netdev_mtu_error; /* Cached error code from SIOCGIFMTU or SIOCSIFMTU. */
+ int ether_addr_error; /* Cached error code from set/get etheraddr. */
+ int netdev_policing_error; /* Cached error code from set policing. */
+ int get_features_error; /* Cached error code from ETHTOOL_GSET. */
+ int get_ifindex_error; /* Cached error code from SIOCGIFINDEX. */
+
+ enum netdev_features current; /* Cached from ETHTOOL_GSET. */
+ enum netdev_features advertised; /* Cached from ETHTOOL_GSET. */
+ enum netdev_features supported; /* Cached from ETHTOOL_GSET. */
+
+ struct ethtool_drvinfo drvinfo; /* Cached from ETHTOOL_GDRVINFO. */
+ struct tc *tc;
+
+ /* For devices of class netdev_tap_class only. */
+ int tap_fd;
};
-struct netdev_linux {
- struct netdev netdev;
+struct netdev_rxq_linux {
+ struct netdev_rxq up;
+ bool is_tap;
int fd;
};
-/* An AF_INET socket (used for ioctl operations). */
-static int af_inet_sock = -1;
-
-struct gre_config {
- uint32_t local_ip;
- uint32_t remote_ip;
- uint32_t in_key;
- uint32_t out_key;
- bool have_in_key;
- bool have_out_key;
- bool in_csum;
- bool out_csum;
-};
-
-static struct {
- union {
- struct nl_sock *nl_sock;
- int ioctl_fd;
- };
- bool use_ioctl;
-} gre_descriptors;
-
-struct netdev_linux_notifier {
- struct netdev_notifier notifier;
- struct list node;
-};
-
-static struct shash netdev_linux_notifiers =
- SHASH_INITIALIZER(&netdev_linux_notifiers);
-static struct rtnetlink_notifier netdev_linux_poll_notifier;
-
/* 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 int destroy_gre(const char *name);
+/* Polling miimon status for all ports causes performance degradation when
+ * handling a large number of ports. If there are no devices using miimon, then
+ * we skip netdev_linux_miimon_run() and netdev_linux_miimon_wait(). */
+static atomic_int miimon_cnt = ATOMIC_VAR_INIT(0);
+
+static void netdev_linux_run(void);
+
static int netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *,
int cmd, const char *cmd_name);
-static int netdev_linux_do_ioctl(const char *name, struct ifreq *, int cmd,
- const char *cmd_name);
static int netdev_linux_get_ipv4(const struct netdev *, struct in_addr *,
int cmd, const char *cmd_name);
-static int get_flags(const struct netdev *, int *flagsp);
-static int set_flags(struct netdev *, int flags);
+static int get_flags(const struct netdev *, unsigned int *flags);
+static int set_flags(const char *, unsigned int flags);
+static int update_flags(struct netdev_linux *netdev, enum netdev_flags off,
+ enum netdev_flags on, enum netdev_flags *old_flagsp)
+ OVS_REQUIRES(netdev->mutex);
static int do_get_ifindex(const char *netdev_name);
static int get_ifindex(const struct netdev *, int *ifindexp);
static int do_set_addr(struct netdev *netdev,
int ioctl_nr, const char *ioctl_name,
struct in_addr addr);
static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]);
-static int set_etheraddr(const char *netdev_name, int hwaddr_family,
- const uint8_t[ETH_ADDR_LEN]);
-static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats);
-static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats);
+static int set_etheraddr(const char *netdev_name, const uint8_t[ETH_ADDR_LEN]);
+static int get_stats_via_netlink(const struct netdev *, struct netdev_stats *);
+static int af_packet_sock(void);
+static bool netdev_linux_miimon_enabled(void);
+static void netdev_linux_miimon_run(void);
+static void netdev_linux_miimon_wait(void);
+static int netdev_linux_get_mtu__(struct netdev_linux *netdev, int *mtup);
-static struct netdev_dev_linux *
-netdev_dev_linux_cast(const struct netdev_dev *netdev_dev)
+static bool
+is_netdev_linux_class(const struct netdev_class *netdev_class)
{
- const char *type = netdev_dev_get_type(netdev_dev);
- assert(!strcmp(type, "system") || !strcmp(type, "tap")
- || !strcmp(type, "gre"));
- return CONTAINER_OF(netdev_dev, struct netdev_dev_linux, netdev_dev);
+ return netdev_class->run == netdev_linux_run;
}
-static struct netdev_linux *
-netdev_linux_cast(const struct netdev *netdev)
+static bool
+is_tap_netdev(const struct netdev *netdev)
{
- const char *type = netdev_get_type(netdev);
- assert(!strcmp(type, "system") || !strcmp(type, "tap")
- || !strcmp(type, "gre"));
- return CONTAINER_OF(netdev, struct netdev_linux, netdev);
+ return netdev_get_class(netdev) == &netdev_tap_class;
}
-static int
-netdev_linux_init(void)
+static struct netdev_linux *
+netdev_linux_cast(const struct netdev *netdev)
{
- static int status = -1;
- if (status < 0) {
- af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
- status = af_inet_sock >= 0 ? 0 : errno;
- if (status) {
- VLOG_ERR("failed to create inet socket: %s", strerror(status));
- }
- }
- return status;
-}
+ ovs_assert(is_netdev_linux_class(netdev_get_class(netdev)));
-static void
-netdev_linux_run(void)
-{
- rtnetlink_notifier_run();
+ return CONTAINER_OF(netdev, struct netdev_linux, up);
}
-static void
-netdev_linux_wait(void)
+static struct netdev_rxq_linux *
+netdev_rxq_linux_cast(const struct netdev_rxq *rx)
{
- rtnetlink_notifier_wait();
-}
-
-static void
-netdev_linux_cache_cb(const struct rtnetlink_change *change,
- void *aux UNUSED)
-{
- struct netdev_dev_linux *dev;
- if (change) {
- struct netdev_dev *base_dev = netdev_dev_from_name(change->ifname);
- if (base_dev) {
- dev = netdev_dev_linux_cast(base_dev);
- dev->cache_valid = 0;
- }
- } else {
- struct shash device_shash;
- struct shash_node *node;
-
- shash_init(&device_shash);
- netdev_dev_get_devices(&netdev_linux_class, &device_shash);
- SHASH_FOR_EACH (node, &device_shash) {
- dev = node->data;
- dev->cache_valid = 0;
- }
- shash_destroy(&device_shash);
- }
+ ovs_assert(is_netdev_linux_class(netdev_get_class(rx->netdev)));
+ return CONTAINER_OF(rx, struct netdev_rxq_linux, up);
}
-
-/* The arguments are marked as unused to prevent warnings on platforms where
- * the Netlink interface isn't supported. */
-static int
-setup_gre_netlink(const char *name UNUSED, struct gre_config *config UNUSED,
- bool create UNUSED)
+\f
+static void netdev_linux_update(struct netdev_linux *netdev,
+ const struct rtnetlink_link_change *)
+ OVS_REQUIRES(netdev->mutex);
+static void netdev_linux_changed(struct netdev_linux *netdev,
+ unsigned int ifi_flags, unsigned int mask)
+ OVS_REQUIRES(netdev->mutex);
+
+/* Returns a NETLINK_ROUTE socket listening for RTNLGRP_LINK changes, or NULL
+ * if no such socket could be created. */
+static struct nl_sock *
+netdev_linux_notify_sock(void)
{
-#ifdef GRE_IOCTL_ONLY
- return EOPNOTSUPP;
-#else
- int error;
- struct ofpbuf request, *reply;
- unsigned int nl_flags;
- struct ifinfomsg ifinfomsg;
- struct nlattr *linkinfo_hdr;
- struct nlattr *info_data_hdr;
- uint16_t iflags = 0;
- uint16_t oflags = 0;
- uint8_t pmtudisc = 0;
-
- VLOG_DBG("%s: attempting to create gre device using netlink", name);
-
- if (!gre_descriptors.nl_sock) {
- error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0,
- &gre_descriptors.nl_sock);
- if (error) {
- VLOG_WARN("couldn't create netlink socket: %s", strerror(error));
- goto error;
- }
- }
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+ static struct nl_sock *sock;
- ofpbuf_init(&request, 0);
+ if (ovsthread_once_start(&once)) {
+ int error;
- nl_flags = NLM_F_REQUEST;
- if (create) {
- nl_flags |= NLM_F_CREATE|NLM_F_EXCL;
+ error = nl_sock_create(NETLINK_ROUTE, &sock);
+ if (!error) {
+ error = nl_sock_join_mcgroup(sock, RTNLGRP_LINK);
+ if (error) {
+ nl_sock_destroy(sock);
+ sock = NULL;
+ }
+ }
+ ovsthread_once_done(&once);
}
- /* We over-reserve space, because we do some pointer arithmetic
- * and don't want the buffer address shifting under us. */
- nl_msg_put_nlmsghdr(&request, gre_descriptors.nl_sock, 2048, RTM_NEWLINK,
- nl_flags);
-
- memset(&ifinfomsg, 0, sizeof ifinfomsg);
- ifinfomsg.ifi_family = AF_UNSPEC;
- nl_msg_put(&request, &ifinfomsg, sizeof ifinfomsg);
-
- linkinfo_hdr = ofpbuf_tail(&request);
- nl_msg_put_unspec(&request, IFLA_LINKINFO, NULL, 0);
+ return sock;
+}
- nl_msg_put_unspec(&request, IFLA_INFO_KIND, "gretap", 6);
+static bool
+netdev_linux_miimon_enabled(void)
+{
+ int miimon;
- info_data_hdr = ofpbuf_tail(&request);
- nl_msg_put_unspec(&request, IFLA_INFO_DATA, NULL, 0);
+ atomic_read(&miimon_cnt, &miimon);
+ return miimon > 0;
+}
- /* Set flags */
- if (config->have_in_key) {
- iflags |= GRE_KEY;
- }
- if (config->have_out_key) {
- oflags |= GRE_KEY;
- }
+static void
+netdev_linux_run(void)
+{
+ struct nl_sock *sock;
+ int error;
- if (config->in_csum) {
- iflags |= GRE_CSUM;
- }
- if (config->out_csum) {
- oflags |= GRE_CSUM;
+ if (netdev_linux_miimon_enabled()) {
+ netdev_linux_miimon_run();
}
- /* Add options */
- nl_msg_put_u32(&request, IFLA_GRE_IKEY, config->in_key);
- nl_msg_put_u32(&request, IFLA_GRE_OKEY, config->out_key);
- nl_msg_put_u16(&request, IFLA_GRE_IFLAGS, iflags);
- nl_msg_put_u16(&request, IFLA_GRE_OFLAGS, oflags);
- nl_msg_put_u32(&request, IFLA_GRE_LOCAL, config->local_ip);
- nl_msg_put_u32(&request, IFLA_GRE_REMOTE, config->remote_ip);
- nl_msg_put_u8(&request, IFLA_GRE_PMTUDISC, pmtudisc);
- nl_msg_put_u8(&request, IFLA_GRE_TTL, 0);
- nl_msg_put_u8(&request, IFLA_GRE_TOS, 0);
-
- info_data_hdr->nla_len = (char *)ofpbuf_tail(&request)
- - (char *)info_data_hdr;
- linkinfo_hdr->nla_len = (char *)ofpbuf_tail(&request)
- - (char *)linkinfo_hdr;
-
- nl_msg_put_string(&request, IFLA_IFNAME, name);
-
- error = nl_sock_transact(gre_descriptors.nl_sock, &request, &reply);
- ofpbuf_uninit(&request);
- if (error) {
- VLOG_WARN("couldn't transact netlink socket: %s", strerror(error));
- goto error;
+ sock = netdev_linux_notify_sock();
+ if (!sock) {
+ return;
}
- ofpbuf_delete(reply);
-
-error:
- return error;
-#endif
-}
-
-static int
-setup_gre_ioctl(const char *name, struct gre_config *config, bool create)
-{
- struct ip_tunnel_parm p;
- struct ifreq ifr;
- VLOG_DBG("%s: attempting to create gre device using ioctl", name);
+ do {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ uint64_t buf_stub[4096 / 8];
+ struct ofpbuf buf;
- memset(&p, 0, sizeof p);
+ ofpbuf_use_stub(&buf, buf_stub, sizeof buf_stub);
+ error = nl_sock_recv(sock, &buf, false);
+ if (!error) {
+ struct rtnetlink_link_change change;
- strncpy(p.name, name, IFNAMSIZ);
+ if (rtnetlink_link_parse(&buf, &change)) {
+ struct netdev *netdev_ = netdev_from_name(change.ifname);
+ if (netdev_ && is_netdev_linux_class(netdev_->netdev_class)) {
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
- p.iph.version = 4;
- p.iph.ihl = 5;
- p.iph.protocol = IPPROTO_GRE;
- p.iph.saddr = config->local_ip;
- p.iph.daddr = config->remote_ip;
+ ovs_mutex_lock(&netdev->mutex);
+ netdev_linux_update(netdev, &change);
+ ovs_mutex_unlock(&netdev->mutex);
+ }
+ netdev_close(netdev_);
+ }
+ } else if (error == ENOBUFS) {
+ struct shash device_shash;
+ struct shash_node *node;
- if (config->have_in_key) {
- p.i_flags |= GRE_KEY;
- p.i_key = config->in_key;
- }
- if (config->have_out_key) {
- p.o_flags |= GRE_KEY;
- p.o_key = config->out_key;
- }
+ nl_sock_drain(sock);
- if (config->in_csum) {
- p.i_flags |= GRE_CSUM;
- }
- if (config->out_csum) {
- p.o_flags |= GRE_CSUM;
- }
+ shash_init(&device_shash);
+ netdev_get_devices(&netdev_linux_class, &device_shash);
+ SHASH_FOR_EACH (node, &device_shash) {
+ struct netdev *netdev_ = node->data;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ unsigned int flags;
- strncpy(ifr.ifr_name, create ? GRE_IOCTL_DEVICE : name, IFNAMSIZ);
- ifr.ifr_ifru.ifru_data = (void *)&p;
+ ovs_mutex_lock(&netdev->mutex);
+ get_flags(netdev_, &flags);
+ netdev_linux_changed(netdev, flags, 0);
+ ovs_mutex_unlock(&netdev->mutex);
- if (!gre_descriptors.ioctl_fd) {
- gre_descriptors.ioctl_fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (gre_descriptors.ioctl_fd < 0) {
- VLOG_WARN("couldn't create gre ioctl socket: %s", strerror(errno));
- gre_descriptors.ioctl_fd = 0;
- return errno;
+ netdev_close(netdev_);
+ }
+ shash_destroy(&device_shash);
+ } else if (error != EAGAIN) {
+ VLOG_WARN_RL(&rl, "error reading or parsing netlink (%s)",
+ ovs_strerror(error));
}
- }
-
- if (ioctl(gre_descriptors.ioctl_fd, create ? SIOCADDGRETAP : SIOCCHGGRETAP,
- &ifr) < 0) {
- VLOG_WARN("couldn't do gre ioctl: %s", strerror(errno));
- return errno;
- }
-
- return 0;
+ ofpbuf_uninit(&buf);
+ } while (!error);
}
-/* The arguments are marked as unused to prevent warnings on platforms where
- * the Netlink interface isn't supported. */
-static bool
-check_gre_device_netlink(const char *name UNUSED)
+static void
+netdev_linux_wait(void)
{
-#ifdef GRE_IOCTL_ONLY
- return false;
-#else
- static const struct nl_policy getlink_policy[] = {
- [IFLA_LINKINFO] = { .type = NL_A_NESTED, .optional = false },
- };
-
- static const struct nl_policy linkinfo_policy[] = {
- [IFLA_INFO_KIND] = { .type = NL_A_STRING, .optional = false },
- };
-
- int error;
- bool ret = false;
- struct ofpbuf request, *reply;
- struct ifinfomsg ifinfomsg;
- struct nlattr *getlink_attrs[ARRAY_SIZE(getlink_policy)];
- struct nlattr *linkinfo_attrs[ARRAY_SIZE(linkinfo_policy)];
- struct ofpbuf linkinfo;
- const char *device_kind;
-
- ofpbuf_init(&request, 0);
-
- nl_msg_put_nlmsghdr(&request, gre_descriptors.nl_sock,
- NLMSG_LENGTH(sizeof ifinfomsg), RTM_GETLINK,
- NLM_F_REQUEST);
+ struct nl_sock *sock;
- memset(&ifinfomsg, 0, sizeof ifinfomsg);
- ifinfomsg.ifi_family = AF_UNSPEC;
- ifinfomsg.ifi_index = do_get_ifindex(name);
- nl_msg_put(&request, &ifinfomsg, sizeof ifinfomsg);
-
- error = nl_sock_transact(gre_descriptors.nl_sock, &request, &reply);
- ofpbuf_uninit(&request);
- if (error) {
- VLOG_WARN("couldn't transact netlink socket: %s", strerror(error));
- return false;
+ if (netdev_linux_miimon_enabled()) {
+ netdev_linux_miimon_wait();
}
-
- if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
- getlink_policy, getlink_attrs,
- ARRAY_SIZE(getlink_policy))) {
- VLOG_WARN("received bad rtnl message (getlink policy)");
- goto error;
- }
-
- linkinfo.data = (void *)nl_attr_get(getlink_attrs[IFLA_LINKINFO]);
- linkinfo.size = nl_attr_get_size(getlink_attrs[IFLA_LINKINFO]);
- if (!nl_policy_parse(&linkinfo, 0, linkinfo_policy,
- linkinfo_attrs, ARRAY_SIZE(linkinfo_policy))) {
- VLOG_WARN("received bad rtnl message (linkinfo policy)");
- goto error;
+ sock = netdev_linux_notify_sock();
+ if (sock) {
+ nl_sock_wait(sock, POLLIN);
}
-
- device_kind = nl_attr_get_string(linkinfo_attrs[IFLA_INFO_KIND]);
- ret = !strcmp(device_kind, "gretap");
-
-error:
- ofpbuf_delete(reply);
- return ret;
-#endif
}
-static bool
-check_gre_device_ioctl(const char *name)
+static void
+netdev_linux_changed(struct netdev_linux *dev,
+ unsigned int ifi_flags, unsigned int mask)
+ OVS_REQUIRES(dev->mutex)
{
- struct ethtool_drvinfo drvinfo;
- int error;
+ netdev_change_seq_changed(&dev->up);
- memset(&drvinfo, 0, sizeof drvinfo);
- error = netdev_linux_do_ethtool(name, (struct ethtool_cmd *)&drvinfo,
- ETHTOOL_GDRVINFO, "ETHTOOL_GDRVINFO");
+ if ((dev->ifi_flags ^ ifi_flags) & IFF_RUNNING) {
+ dev->carrier_resets++;
+ }
+ dev->ifi_flags = ifi_flags;
- return !error && !strcmp(drvinfo.driver, "ip_gre")
- && !strcmp(drvinfo.bus_info, "gretap");
+ dev->cache_valid &= mask;
}
-static int
-setup_gre(const char *name, const struct shash *args, bool create)
+static void
+netdev_linux_update(struct netdev_linux *dev,
+ const struct rtnetlink_link_change *change)
+ OVS_REQUIRES(dev->mutex)
{
- int error;
- struct in_addr in_addr;
- struct shash_node *node;
- struct gre_config config;
-
- memset(&config, 0, sizeof config);
- config.in_csum = true;
- config.out_csum = true;
-
- SHASH_FOR_EACH (node, args) {
- if (!strcmp(node->name, "remote_ip")) {
- if (lookup_ip(node->data, &in_addr)) {
- VLOG_WARN("bad 'remote_ip' for gre device %s ", name);
- } else {
- config.remote_ip = in_addr.s_addr;
- }
- } else if (!strcmp(node->name, "local_ip")) {
- if (lookup_ip(node->data, &in_addr)) {
- VLOG_WARN("bad 'local_ip' for gre device %s ", name);
- } else {
- config.local_ip = in_addr.s_addr;
- }
- } else if (!strcmp(node->name, "key")) {
- config.have_in_key = true;
- config.have_out_key = true;
- config.in_key = htonl(atoi(node->data));
- config.out_key = htonl(atoi(node->data));
- } else if (!strcmp(node->name, "in_key")) {
- config.have_in_key = true;
- config.in_key = htonl(atoi(node->data));
- } else if (!strcmp(node->name, "out_key")) {
- config.have_out_key = true;
- config.out_key = htonl(atoi(node->data));
- } else if (!strcmp(node->name, "csum")) {
- if (!strcmp(node->data, "false")) {
- config.in_csum = false;
- config.out_csum = false;
- }
- } else {
- VLOG_WARN("unknown gre argument '%s'", node->name);
- }
- }
-
- if (!config.remote_ip) {
- VLOG_WARN("gre type requires valid 'remote_ip' argument");
- error = EINVAL;
- goto error;
- }
-
- if (!gre_descriptors.use_ioctl) {
- error = setup_gre_netlink(name, &config, create);
- if (error == EOPNOTSUPP) {
- gre_descriptors.use_ioctl = true;
- }
- }
- if (gre_descriptors.use_ioctl) {
- error = setup_gre_ioctl(name, &config, create);
- }
-
- if (create && error == EEXIST) {
- bool gre_device;
-
- if (gre_descriptors.use_ioctl) {
- gre_device = check_gre_device_ioctl(name);
- } else {
- gre_device = check_gre_device_netlink(name);
+ if (change->nlmsg_type == RTM_NEWLINK) {
+ /* Keep drv-info */
+ netdev_linux_changed(dev, change->ifi_flags, VALID_DRVINFO);
+
+ /* Update netdev from rtnl-change msg. */
+ if (change->mtu) {
+ dev->mtu = change->mtu;
+ dev->cache_valid |= VALID_MTU;
+ dev->netdev_mtu_error = 0;
}
- if (!gre_device) {
- goto error;
+ if (!eth_addr_is_zero(change->addr)) {
+ memcpy(dev->etheraddr, change->addr, ETH_ADDR_LEN);
+ dev->cache_valid |= VALID_ETHERADDR;
+ dev->ether_addr_error = 0;
}
- VLOG_WARN("replacing existing gre device %s", name);
- error = destroy_gre(name);
- if (error) {
- goto error;
- }
+ dev->ifindex = change->ifi_index;
+ dev->cache_valid |= VALID_IFINDEX;
+ dev->get_ifindex_error = 0;
- if (gre_descriptors.use_ioctl) {
- error = setup_gre_ioctl(name, &config, create);
- } else {
- error = setup_gre_netlink(name, &config, create);
- }
+ } else {
+ netdev_linux_changed(dev, change->ifi_flags, 0);
}
+}
-error:
- return error;
+static struct netdev *
+netdev_linux_alloc(void)
+{
+ struct netdev_linux *netdev = xzalloc(sizeof *netdev);
+ return &netdev->up;
+}
+
+static void
+netdev_linux_common_construct(struct netdev_linux *netdev)
+{
+ ovs_mutex_init(&netdev->mutex);
}
-/* Creates the netdev device of 'type' with 'name'. */
+/* Creates system and internal devices. */
static int
-netdev_linux_create_system(const char *name, const char *type UNUSED,
- const struct shash *args, struct netdev_dev **netdev_devp)
+netdev_linux_construct(struct netdev *netdev_)
{
- struct netdev_dev_linux *netdev_dev;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
int error;
- if (!shash_is_empty(args)) {
- VLOG_WARN("%s: arguments for system devices should be empty", name);
- }
+ netdev_linux_common_construct(netdev);
- if (!cache_notifier_refcount) {
- error = rtnetlink_notifier_register(&netdev_linux_cache_notifier,
- netdev_linux_cache_cb, NULL);
- if (error) {
- return error;
+ error = get_flags(&netdev->up, &netdev->ifi_flags);
+ if (error == ENODEV) {
+ if (netdev->up.netdev_class != &netdev_internal_class) {
+ /* The device does not exist, so don't allow it to be opened. */
+ return ENODEV;
+ } else {
+ /* "Internal" netdevs have to be created as netdev objects before
+ * they exist in the kernel, because creating them in the kernel
+ * happens by passing a netdev object to dpif_port_add().
+ * Therefore, ignore the error. */
}
}
- cache_notifier_refcount++;
-
- netdev_dev = xzalloc(sizeof *netdev_dev);
- netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_linux_class);
- *netdev_devp = &netdev_dev->netdev_dev;
return 0;
}
* buffers, across all readers. Therefore once data is read it will
* be unavailable to other reads for tap devices. */
static int
-netdev_linux_create_tap(const char *name, const char *type UNUSED,
- const struct shash *args, struct netdev_dev **netdev_devp)
+netdev_linux_construct_tap(struct netdev *netdev_)
{
- struct netdev_dev_linux *netdev_dev;
- struct tap_state *state;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
static const char tap_dev[] = "/dev/net/tun";
+ const char *name = netdev_->name;
struct ifreq ifr;
int error;
- if (!shash_is_empty(args)) {
- VLOG_WARN("%s: arguments for TAP devices should be empty", name);
- }
-
- netdev_dev = xzalloc(sizeof *netdev_dev);
- state = &netdev_dev->state.tap;
+ netdev_linux_common_construct(netdev);
/* Open tap device. */
- state->fd = open(tap_dev, O_RDWR);
- if (state->fd < 0) {
+ netdev->tap_fd = open(tap_dev, O_RDWR);
+ if (netdev->tap_fd < 0) {
error = errno;
- VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error));
- goto error;
+ VLOG_WARN("opening \"%s\" failed: %s", tap_dev, ovs_strerror(error));
+ return error;
}
/* Create tap device. */
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
- if (ioctl(state->fd, TUNSETIFF, &ifr) == -1) {
+ ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+ if (ioctl(netdev->tap_fd, TUNSETIFF, &ifr) == -1) {
VLOG_WARN("%s: creating tap device failed: %s", name,
- strerror(errno));
+ ovs_strerror(errno));
error = errno;
- goto error;
+ goto error_close;
}
/* Make non-blocking. */
- error = set_nonblocking(state->fd);
+ error = set_nonblocking(netdev->tap_fd);
if (error) {
- goto error;
+ goto error_close;
}
- netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_tap_class);
- *netdev_devp = &netdev_dev->netdev_dev;
return 0;
-error:
- free(netdev_dev);
+error_close:
+ close(netdev->tap_fd);
return error;
}
-static int
-if_up(const char *name)
+static void
+netdev_linux_destruct(struct netdev *netdev_)
{
- struct ifreq ifr;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
- ifr.ifr_flags = IFF_UP;
+ if (netdev->tc && netdev->tc->ops->tc_destroy) {
+ netdev->tc->ops->tc_destroy(netdev->tc);
+ }
- if (ioctl(af_inet_sock, SIOCSIFFLAGS, &ifr) == -1) {
- VLOG_DBG_RL(&rl, "%s: failed to bring device up: %s",
- name, strerror(errno));
- return errno;
+ if (netdev_get_class(netdev_) == &netdev_tap_class
+ && netdev->tap_fd >= 0)
+ {
+ close(netdev->tap_fd);
}
- return 0;
-}
-
-static int
-netdev_linux_create_gre(const char *name, const char *type UNUSED,
- const struct shash *args, struct netdev_dev **netdev_devp)
-{
- struct netdev_dev_linux *netdev_dev;
- int error;
-
- netdev_dev = xzalloc(sizeof *netdev_dev);
-
- error = setup_gre(name, args, true);
- if (error) {
- goto error;
- }
-
- error = if_up(name);
- if (error) {
- goto error;
- }
-
- netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_gre_class);
- *netdev_devp = &netdev_dev->netdev_dev;
- return 0;
-
-error:
- free(netdev_dev);
- return error;
-}
-
-static int
-netdev_linux_reconfigure_gre(struct netdev_dev *netdev_dev_,
- const struct shash *args)
-{
- const char *name = netdev_dev_get_name(netdev_dev_);
-
- return setup_gre(name, args, false);
-}
-
-/* The arguments are marked as unused to prevent warnings on platforms where
- * the Netlink interface isn't supported. */
-static int
-destroy_gre_netlink(const char *name UNUSED)
-{
-#ifdef GRE_IOCTL_ONLY
- return EOPNOTSUPP;
-#else
- int error;
- struct ofpbuf request, *reply;
- struct ifinfomsg ifinfomsg;
- int ifindex;
-
- ofpbuf_init(&request, 0);
-
- nl_msg_put_nlmsghdr(&request, gre_descriptors.nl_sock, 0, RTM_DELLINK,
- NLM_F_REQUEST);
-
- memset(&ifinfomsg, 0, sizeof ifinfomsg);
- ifinfomsg.ifi_family = AF_UNSPEC;
- nl_msg_put(&request, &ifinfomsg, sizeof ifinfomsg);
-
- ifindex = do_get_ifindex(name);
- nl_msg_put_u32(&request, IFLA_LINK, ifindex);
-
- nl_msg_put_string(&request, IFLA_IFNAME, name);
-
- error = nl_sock_transact(gre_descriptors.nl_sock, &request, &reply);
- ofpbuf_uninit(&request);
- if (error) {
- VLOG_WARN("couldn't transact netlink socket: %s", strerror(error));
- goto error;
- }
- ofpbuf_delete(reply);
-
-error:
- return 0;
-#endif
-}
-
-static int
-destroy_gre_ioctl(const char *name)
-{
- struct ip_tunnel_parm p;
- struct ifreq ifr;
-
- memset(&p, 0, sizeof p);
- strncpy(p.name, name, IFNAMSIZ);
-
- strncpy(ifr.ifr_name, name, IFNAMSIZ);
- ifr.ifr_ifru.ifru_data = (void *)&p;
-
- if (ioctl(gre_descriptors.ioctl_fd, SIOCDELGRETAP, &ifr) < 0) {
- VLOG_WARN("couldn't do gre ioctl: %s\n", strerror(errno));
- return errno;
+ if (netdev->miimon_interval > 0) {
+ int junk;
+ atomic_sub(&miimon_cnt, 1, &junk);
}
- return 0;
+ ovs_mutex_destroy(&netdev->mutex);
}
static void
-destroy_tap(struct netdev_dev_linux *netdev_dev)
-{
- struct tap_state *state = &netdev_dev->state.tap;
-
- if (state->fd >= 0) {
- close(state->fd);
- }
-}
-
-static int
-destroy_gre(const char *name)
+netdev_linux_dealloc(struct netdev *netdev_)
{
- if (gre_descriptors.use_ioctl) {
- return destroy_gre_ioctl(name);
- } else {
- return destroy_gre_netlink(name);
- }
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ free(netdev);
}
-/* Destroys the netdev device 'netdev_dev_'. */
-static void
-netdev_linux_destroy(struct netdev_dev *netdev_dev_)
+static struct netdev_rxq *
+netdev_linux_rxq_alloc(void)
{
- struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_);
- const char *type = netdev_dev_get_type(netdev_dev_);
-
- if (!strcmp(type, "system")) {
- cache_notifier_refcount--;
-
- if (!cache_notifier_refcount) {
- rtnetlink_notifier_unregister(&netdev_linux_cache_notifier);
- }
- } else if (!strcmp(type, "tap")) {
- destroy_tap(netdev_dev);
- } else if (!strcmp(type, "gre")) {
- destroy_gre(netdev_dev_get_name(&netdev_dev->netdev_dev));
- }
-
- free(netdev_dev_);
+ struct netdev_rxq_linux *rx = xzalloc(sizeof *rx);
+ return &rx->up;
}
static int
-netdev_linux_open(struct netdev_dev *netdev_dev_, int ethertype,
- struct netdev **netdevp)
+netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
{
- struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_);
- struct netdev_linux *netdev;
- enum netdev_flags flags;
+ struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
+ struct netdev *netdev_ = rx->up.netdev;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
int error;
- /* Allocate network device. */
- netdev = xzalloc(sizeof *netdev);
- netdev->fd = -1;
- netdev_init(&netdev->netdev, netdev_dev_);
-
- error = netdev_get_flags(&netdev->netdev, &flags);
- if (error == ENODEV) {
- goto error;
- }
-
- if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap")) {
- netdev->fd = netdev_dev->state.tap.fd;
- } else if (ethertype != NETDEV_ETH_TYPE_NONE) {
+ ovs_mutex_lock(&netdev->mutex);
+ rx->is_tap = is_tap_netdev(netdev_);
+ if (rx->is_tap) {
+ rx->fd = netdev->tap_fd;
+ } else {
struct sockaddr_ll sll;
- int protocol;
- int ifindex;
+ int ifindex, val;
+ /* Result of tcpdump -dd inbound */
+ static const struct sock_filter filt[] = {
+ { 0x28, 0, 0, 0xfffff004 }, /* ldh [0] */
+ { 0x15, 0, 1, 0x00000004 }, /* jeq #4 jt 2 jf 3 */
+ { 0x6, 0, 0, 0x00000000 }, /* ret #0 */
+ { 0x6, 0, 0, 0x0000ffff } /* ret #65535 */
+ };
+ static const struct sock_fprog fprog = {
+ ARRAY_SIZE(filt), (struct sock_filter *) filt
+ };
/* Create file descriptor. */
- protocol = (ethertype == NETDEV_ETH_TYPE_ANY ? ETH_P_ALL
- : ethertype == NETDEV_ETH_TYPE_802_2 ? ETH_P_802_2
- : ethertype);
- netdev->fd = socket(PF_PACKET, SOCK_RAW, htons(protocol));
- if (netdev->fd < 0) {
+ rx->fd = socket(PF_PACKET, SOCK_RAW, 0);
+ if (rx->fd < 0) {
+ error = errno;
+ VLOG_ERR("failed to create raw socket (%s)", ovs_strerror(error));
+ goto error;
+ }
+
+ val = 1;
+ if (setsockopt(rx->fd, SOL_PACKET, PACKET_AUXDATA, &val, sizeof val)) {
error = errno;
+ VLOG_ERR("%s: failed to mark socket for auxdata (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
goto error;
}
/* Set non-blocking mode. */
- error = set_nonblocking(netdev->fd);
+ error = set_nonblocking(rx->fd);
if (error) {
goto error;
}
/* Get ethernet device index. */
- error = get_ifindex(&netdev->netdev, &ifindex);
+ error = get_ifindex(&netdev->up, &ifindex);
if (error) {
goto error;
}
memset(&sll, 0, sizeof sll);
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifindex;
- if (bind(netdev->fd,
- (struct sockaddr *) &sll, sizeof sll) < 0) {
+ sll.sll_protocol = htons(ETH_P_ALL);
+ if (bind(rx->fd, (struct sockaddr *) &sll, sizeof sll) < 0) {
error = errno;
- VLOG_ERR("bind to %s failed: %s", netdev_dev_get_name(netdev_dev_),
- strerror(error));
+ VLOG_ERR("%s: failed to bind raw socket (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
goto 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);
+ /* Filter for only inbound packets. */
+ error = setsockopt(rx->fd, SOL_SOCKET, SO_ATTACH_FILTER, &fprog,
+ sizeof fprog);
if (error) {
+ error = errno;
+ VLOG_ERR("%s: failed to attach filter (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
goto error;
}
}
+ ovs_mutex_unlock(&netdev->mutex);
- *netdevp = &netdev->netdev;
return 0;
error:
- netdev_uninit(&netdev->netdev, true);
+ if (rx->fd >= 0) {
+ close(rx->fd);
+ }
+ ovs_mutex_unlock(&netdev->mutex);
return error;
}
-/* Closes and destroys 'netdev'. */
static void
-netdev_linux_close(struct netdev *netdev_)
+netdev_linux_rxq_destruct(struct netdev_rxq *rxq_)
{
- struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
- if (netdev->fd > 0 && strcmp(netdev_get_type(netdev_), "tap")) {
- close(netdev->fd);
+ if (!rx->is_tap) {
+ close(rx->fd);
}
- free(netdev);
}
-/* Initializes 'svec' with a list of the names of all known network devices. */
+static void
+netdev_linux_rxq_dealloc(struct netdev_rxq *rxq_)
+{
+ struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
+
+ free(rx);
+}
+
+static ovs_be16
+auxdata_to_vlan_tpid(const struct tpacket_auxdata *aux)
+{
+ if (aux->tp_status & TP_STATUS_VLAN_TPID_VALID) {
+ return htons(aux->tp_vlan_tpid);
+ } else {
+ return htons(ETH_TYPE_VLAN);
+ }
+}
+
+static bool
+auxdata_has_vlan_tci(const struct tpacket_auxdata *aux)
+{
+ return aux->tp_vlan_tci || aux->tp_status & TP_STATUS_VLAN_VALID;
+}
+
static int
-netdev_linux_enumerate(struct svec *svec)
+netdev_linux_rxq_recv_sock(int fd, struct ofpbuf *buffer)
{
- struct if_nameindex *names;
+ size_t size;
+ ssize_t retval;
+ struct iovec iov;
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr cmsg;
+ char buffer[CMSG_SPACE(sizeof(struct tpacket_auxdata))];
+ } cmsg_buffer;
+ struct msghdr msgh;
+
+ /* Reserve headroom for a single VLAN tag */
+ ofpbuf_reserve(buffer, VLAN_HEADER_LEN);
+ size = ofpbuf_tailroom(buffer);
+
+ iov.iov_base = ofpbuf_data(buffer);
+ iov.iov_len = size;
+ msgh.msg_name = NULL;
+ msgh.msg_namelen = 0;
+ msgh.msg_iov = &iov;
+ msgh.msg_iovlen = 1;
+ msgh.msg_control = &cmsg_buffer;
+ msgh.msg_controllen = sizeof cmsg_buffer;
+ msgh.msg_flags = 0;
+
+ do {
+ retval = recvmsg(fd, &msgh, MSG_TRUNC);
+ } while (retval < 0 && errno == EINTR);
+
+ if (retval < 0) {
+ return errno;
+ } else if (retval > size) {
+ return EMSGSIZE;
+ }
- names = if_nameindex();
- if (names) {
- size_t i;
+ ofpbuf_set_size(buffer, ofpbuf_size(buffer) + retval);
- for (i = 0; names[i].if_name != NULL; i++) {
- svec_add(svec, names[i].if_name);
+ for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg; cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
+ const struct tpacket_auxdata *aux;
+
+ if (cmsg->cmsg_level != SOL_PACKET
+ || cmsg->cmsg_type != PACKET_AUXDATA
+ || cmsg->cmsg_len < CMSG_LEN(sizeof(struct tpacket_auxdata))) {
+ continue;
}
- if_freenameindex(names);
- return 0;
- } else {
- VLOG_WARN("could not obtain list of network device names: %s",
- strerror(errno));
+
+ aux = ALIGNED_CAST(struct tpacket_auxdata *, CMSG_DATA(cmsg));
+ if (auxdata_has_vlan_tci(aux)) {
+ if (retval < ETH_HEADER_LEN) {
+ return EINVAL;
+ }
+
+ eth_push_vlan(buffer, auxdata_to_vlan_tpid(aux),
+ htons(aux->tp_vlan_tci));
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int
+netdev_linux_rxq_recv_tap(int fd, struct ofpbuf *buffer)
+{
+ ssize_t retval;
+ size_t size = ofpbuf_tailroom(buffer);
+
+ do {
+ retval = read(fd, ofpbuf_data(buffer), size);
+ } while (retval < 0 && errno == EINTR);
+
+ if (retval < 0) {
return errno;
+ } else if (retval > size) {
+ return EMSGSIZE;
}
+
+ ofpbuf_set_size(buffer, ofpbuf_size(buffer) + retval);
+ return 0;
}
static int
-netdev_linux_recv(struct netdev *netdev_, void *data, size_t size)
+netdev_linux_rxq_recv(struct netdev_rxq *rxq_, struct ofpbuf **packet, int *c)
{
- struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
+ struct netdev *netdev = rx->up.netdev;
+ struct ofpbuf *buffer;
+ ssize_t retval;
+ int mtu;
- if (netdev->fd < 0) {
- /* Device was opened with NETDEV_ETH_TYPE_NONE. */
- return -EAGAIN;
+ if (netdev_linux_get_mtu__(netdev_linux_cast(netdev), &mtu)) {
+ mtu = ETH_PAYLOAD_MAX;
}
- for (;;) {
- ssize_t retval = read(netdev->fd, data, size);
- if (retval >= 0) {
- return retval;
- } else if (errno != EINTR) {
- if (errno != EAGAIN) {
- VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s",
- strerror(errno), netdev_get_name(netdev_));
- }
- return -errno;
+ buffer = ofpbuf_new_with_headroom(VLAN_ETH_HEADER_LEN + mtu, DP_NETDEV_HEADROOM);
+
+ retval = (rx->is_tap
+ ? netdev_linux_rxq_recv_tap(rx->fd, buffer)
+ : netdev_linux_rxq_recv_sock(rx->fd, buffer));
+
+ if (retval) {
+ if (retval != EAGAIN && retval != EMSGSIZE) {
+ VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s",
+ ovs_strerror(errno), netdev_rxq_get_name(rxq_));
}
+ ofpbuf_delete(buffer);
+ } else {
+ dp_packet_pad(buffer);
+ packet[0] = buffer;
+ *c = 1;
}
+
+ return retval;
}
-/* 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'. */
static void
-netdev_linux_recv_wait(struct netdev *netdev_)
+netdev_linux_rxq_wait(struct netdev_rxq *rxq_)
{
- struct netdev_linux *netdev = netdev_linux_cast(netdev_);
- if (netdev->fd >= 0) {
- poll_fd_wait(netdev->fd, POLLIN);
- }
+ struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
+ poll_fd_wait(rx->fd, POLLIN);
}
-/* Discards all packets waiting to be received from 'netdev'. */
static int
-netdev_linux_drain(struct netdev *netdev_)
+netdev_linux_rxq_drain(struct netdev_rxq *rxq_)
{
- struct netdev_linux *netdev = netdev_linux_cast(netdev_);
- if (netdev->fd < 0) {
- return 0;
- } else if (!strcmp(netdev_get_type(netdev_), "tap")) {
+ struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
+ if (rx->is_tap) {
struct ifreq ifr;
- int error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr,
- SIOCGIFTXQLEN, "SIOCGIFTXQLEN");
+ int error = af_inet_ifreq_ioctl(netdev_rxq_get_name(rxq_), &ifr,
+ SIOCGIFTXQLEN, "SIOCGIFTXQLEN");
if (error) {
return error;
}
- drain_fd(netdev->fd, ifr.ifr_qlen);
+ drain_fd(rx->fd, ifr.ifr_qlen);
return 0;
} else {
- return drain_rcvbuf(netdev->fd);
+ return drain_rcvbuf(rx->fd);
}
}
* The kernel maintains a packet transmission queue, so the caller is not
* expected to do additional queuing of packets. */
static int
-netdev_linux_send(struct netdev *netdev_, const void *data, size_t size)
+netdev_linux_send(struct netdev *netdev_, struct ofpbuf *pkt, bool may_steal)
{
- struct netdev_linux *netdev = netdev_linux_cast(netdev_);
-
- /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE.
- */
- if (netdev->fd < 0) {
- return EPIPE;
- }
+ const void *data = ofpbuf_data(pkt);
+ size_t size = ofpbuf_size(pkt);
for (;;) {
- ssize_t retval = write(netdev->fd, data, size);
+ ssize_t retval;
+
+ if (!is_tap_netdev(netdev_)) {
+ /* Use our AF_PACKET socket to send to this device. */
+ struct sockaddr_ll sll;
+ struct msghdr msg;
+ struct iovec iov;
+ int ifindex;
+ int sock;
+
+ sock = af_packet_sock();
+ if (sock < 0) {
+ return -sock;
+ }
+
+ ifindex = netdev_get_ifindex(netdev_);
+ if (ifindex < 0) {
+ return -ifindex;
+ }
+
+ /* We don't bother setting most fields in sockaddr_ll because the
+ * kernel ignores them for SOCK_RAW. */
+ memset(&sll, 0, sizeof sll);
+ sll.sll_family = AF_PACKET;
+ sll.sll_ifindex = ifindex;
+
+ iov.iov_base = CONST_CAST(void *, data);
+ iov.iov_len = size;
+
+ msg.msg_name = &sll;
+ msg.msg_namelen = sizeof sll;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ retval = sendmsg(sock, &msg, 0);
+ } else {
+ /* Use the tap fd to send to this device. This is essential for
+ * tap devices, because packets sent to a tap device with an
+ * AF_PACKET socket will loop back to be *received* again on the
+ * tap device. This doesn't occur on other interface types
+ * because we attach a socket filter to the rx socket. */
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+
+ retval = write(netdev->tap_fd, data, size);
+ }
+
+ if (may_steal) {
+ ofpbuf_delete(pkt);
+ }
+
if (retval < 0) {
/* The Linux AF_PACKET implementation never blocks waiting for room
* for packets, instead returning ENOBUFS. Translate this into
continue;
} else if (errno != EAGAIN) {
VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s",
- netdev_get_name(netdev_), strerror(errno));
+ netdev_get_name(netdev_), ovs_strerror(errno));
}
return errno;
} else if (retval != size) {
- VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of "
- "%zu) on %s", retval, size, netdev_get_name(netdev_));
+ VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%"PRIuSIZE"d bytes of "
+ "%"PRIuSIZE") on %s", retval, size, netdev_get_name(netdev_));
return EMSGSIZE;
} else {
return 0;
* expected to do additional queuing of packets. Thus, this function is
* unlikely to ever be used. It is included for completeness. */
static void
-netdev_linux_send_wait(struct netdev *netdev_)
+netdev_linux_send_wait(struct netdev *netdev)
{
- struct netdev_linux *netdev = netdev_linux_cast(netdev_);
- if (netdev->fd < 0) {
- /* Nothing to do. */
- } else if (strcmp(netdev_get_type(netdev_), "tap")) {
- poll_fd_wait(netdev->fd, POLLOUT);
- } else {
+ if (is_tap_netdev(netdev)) {
/* TAP device always accepts packets.*/
poll_immediate_wake();
}
netdev_linux_set_etheraddr(struct netdev *netdev_,
const uint8_t mac[ETH_ADDR_LEN])
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ enum netdev_flags old_flags = 0;
int error;
- if (!(netdev_dev->cache_valid & VALID_ETHERADDR)
- || !eth_addr_equals(netdev_dev->etheraddr, mac)) {
- error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac);
+ ovs_mutex_lock(&netdev->mutex);
+
+ if (netdev->cache_valid & VALID_ETHERADDR) {
+ error = netdev->ether_addr_error;
+ if (error || eth_addr_equals(netdev->etheraddr, mac)) {
+ goto exit;
+ }
+ netdev->cache_valid &= ~VALID_ETHERADDR;
+ }
+
+ /* Tap devices must be brought down before setting the address. */
+ if (is_tap_netdev(netdev_)) {
+ update_flags(netdev, NETDEV_UP, 0, &old_flags);
+ }
+ error = set_etheraddr(netdev_get_name(netdev_), mac);
+ if (!error || error == ENODEV) {
+ netdev->ether_addr_error = error;
+ netdev->cache_valid |= VALID_ETHERADDR;
if (!error) {
- netdev_dev->cache_valid |= VALID_ETHERADDR;
- memcpy(netdev_dev->etheraddr, mac, ETH_ADDR_LEN);
+ memcpy(netdev->etheraddr, mac, ETH_ADDR_LEN);
}
- } else {
- error = 0;
}
+
+ if (is_tap_netdev(netdev_) && old_flags & NETDEV_UP) {
+ update_flags(netdev, 0, NETDEV_UP, &old_flags);
+ }
+
+exit:
+ ovs_mutex_unlock(&netdev->mutex);
return error;
}
-/* Returns a pointer to 'netdev''s MAC address. The caller must not modify or
- * free the returned buffer. */
+/* Copies 'netdev''s MAC address to 'mac' which is passed as param. */
static int
netdev_linux_get_etheraddr(const struct netdev *netdev_,
uint8_t mac[ETH_ADDR_LEN])
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- if (!(netdev_dev->cache_valid & VALID_ETHERADDR)) {
- int error = get_etheraddr(netdev_get_name(netdev_),
- netdev_dev->etheraddr);
- if (error) {
- return error;
- }
- netdev_dev->cache_valid |= VALID_ETHERADDR;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ if (!(netdev->cache_valid & VALID_ETHERADDR)) {
+ netdev->ether_addr_error = get_etheraddr(netdev_get_name(netdev_),
+ netdev->etheraddr);
+ netdev->cache_valid |= VALID_ETHERADDR;
}
- memcpy(mac, netdev_dev->etheraddr, ETH_ADDR_LEN);
- return 0;
+
+ error = netdev->ether_addr_error;
+ if (!error) {
+ memcpy(mac, netdev->etheraddr, ETH_ADDR_LEN);
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_get_mtu__(struct netdev_linux *netdev, int *mtup)
+{
+ int error;
+
+ if (!(netdev->cache_valid & VALID_MTU)) {
+ struct ifreq ifr;
+
+ netdev->netdev_mtu_error = af_inet_ifreq_ioctl(
+ netdev_get_name(&netdev->up), &ifr, SIOCGIFMTU, "SIOCGIFMTU");
+ netdev->mtu = ifr.ifr_mtu;
+ netdev->cache_valid |= VALID_MTU;
+ }
+
+ error = netdev->netdev_mtu_error;
+ if (!error) {
+ *mtup = netdev->mtu;
+ }
+
+ return error;
}
/* Returns the maximum size of transmitted (and received) packets on 'netdev',
static int
netdev_linux_get_mtu(const struct netdev *netdev_, int *mtup)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- if (!(netdev_dev->cache_valid & VALID_MTU)) {
- struct ifreq ifr;
- int error;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
- error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr,
- SIOCGIFMTU, "SIOCGIFMTU");
- if (error) {
- return error;
+ ovs_mutex_lock(&netdev->mutex);
+ error = netdev_linux_get_mtu__(netdev, mtup);
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+/* Sets the maximum size of transmitted (MTU) for given device using linux
+ * networking ioctl interface.
+ */
+static int
+netdev_linux_set_mtu(const struct netdev *netdev_, int mtu)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct ifreq ifr;
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ if (netdev->cache_valid & VALID_MTU) {
+ error = netdev->netdev_mtu_error;
+ if (error || netdev->mtu == mtu) {
+ goto exit;
}
- netdev_dev->mtu = ifr.ifr_mtu;
- netdev_dev->cache_valid |= VALID_MTU;
+ netdev->cache_valid &= ~VALID_MTU;
}
- *mtup = netdev_dev->mtu;
- return 0;
+ ifr.ifr_mtu = mtu;
+ error = af_inet_ifreq_ioctl(netdev_get_name(netdev_), &ifr,
+ SIOCSIFMTU, "SIOCSIFMTU");
+ if (!error || error == ENODEV) {
+ netdev->netdev_mtu_error = error;
+ netdev->mtu = ifr.ifr_mtu;
+ netdev->cache_valid |= VALID_MTU;
+ }
+exit:
+ ovs_mutex_unlock(&netdev->mutex);
+ return error;
}
/* Returns the ifindex of 'netdev', if successful, as a positive number.
* On failure, returns a negative errno value. */
static int
-netdev_linux_get_ifindex(const struct netdev *netdev)
+netdev_linux_get_ifindex(const struct netdev *netdev_)
{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
int ifindex, error;
- error = get_ifindex(netdev, &ifindex);
+ ovs_mutex_lock(&netdev->mutex);
+ error = get_ifindex(netdev_, &ifindex);
+ ovs_mutex_unlock(&netdev->mutex);
+
return error ? -error : ifindex;
}
static int
netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- int error = 0;
- char *fn = NULL;
- int fd = -1;
-
- if (!(netdev_dev->cache_valid & VALID_CARRIER)) {
- char line[8];
- int retval;
-
- fn = xasprintf("/sys/class/net/%s/carrier",
- netdev_get_name(netdev_));
- 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;
- } else if (retval == 0) {
- error = EPROTO;
- VLOG_WARN_RL(&rl, "%s: unexpected end of file", fn);
- goto exit;
- }
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
- 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;
- }
- netdev_dev->carrier = line[0] != '0';
- netdev_dev->cache_valid |= VALID_CARRIER;
+ ovs_mutex_lock(&netdev->mutex);
+ if (netdev->miimon_interval > 0) {
+ *carrier = netdev->miimon;
+ } else {
+ *carrier = (netdev->ifi_flags & IFF_RUNNING) != 0;
}
- *carrier = netdev_dev->carrier;
- error = 0;
+ ovs_mutex_unlock(&netdev->mutex);
-exit:
- if (fd >= 0) {
- close(fd);
- }
- free(fn);
- return error;
+ return 0;
}
-/* Check whether we 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
-check_for_working_netlink_stats(void)
-{
- /* Decide on the netdev_get_stats() implementation to use. Netlink is
- * preferable, so if that works, we'll use it. */
- int ifindex = do_get_ifindex("lo");
- if (ifindex < 0) {
- VLOG_WARN("failed to get ifindex for lo, "
- "obtaining netdev stats from proc");
- return false;
- } else {
- struct netdev_stats stats;
- int error = get_stats_via_netlink(ifindex, &stats);
- if (!error) {
- VLOG_DBG("obtaining netdev stats via rtnetlink");
- return 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));
- return false;
- }
- }
+static long long int
+netdev_linux_get_carrier_resets(const struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ long long int carrier_resets;
+
+ ovs_mutex_lock(&netdev->mutex);
+ carrier_resets = netdev->carrier_resets;
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return carrier_resets;
}
-/* Retrieves current device stats for 'netdev'.
- *
- * XXX All of the members of struct netdev_stats are 64 bits wide, but on
- * 32-bit architectures the Linux network stats are only 32 bits. */
static int
-netdev_linux_get_stats(const struct netdev *netdev_,
- struct netdev_stats *stats)
+netdev_linux_do_miimon(const char *name, int cmd, const char *cmd_name,
+ struct mii_ioctl_data *data)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- static int use_netlink_stats = -1;
+ struct ifreq ifr;
int error;
- struct netdev_stats raw_stats;
- struct netdev_stats *collect_stats = stats;
- COVERAGE_INC(netdev_get_stats);
+ memset(&ifr, 0, sizeof ifr);
+ memcpy(&ifr.ifr_data, data, sizeof *data);
+ error = af_inet_ifreq_ioctl(name, &ifr, cmd, cmd_name);
+ memcpy(data, &ifr.ifr_data, sizeof *data);
- if (!(netdev_dev->cache_valid & VALID_IS_INTERNAL)) {
- netdev_dev->is_internal = !strcmp(netdev_get_type(netdev_), "tap");
- if (!netdev_dev->is_internal) {
- struct ethtool_drvinfo drvinfo;
+ return error;
+}
+
+static int
+netdev_linux_get_miimon(const char *name, bool *miimon)
+{
+ struct mii_ioctl_data data;
+ int error;
- memset(&drvinfo, 0, sizeof drvinfo);
- error = netdev_linux_do_ethtool(netdev_get_name(netdev_),
- (struct ethtool_cmd *)&drvinfo,
- ETHTOOL_GDRVINFO,
- "ETHTOOL_GDRVINFO");
+ *miimon = false;
- if (!error) {
- netdev_dev->is_internal = !strcmp(drvinfo.driver,
- "openvswitch");
+ memset(&data, 0, sizeof data);
+ error = netdev_linux_do_miimon(name, SIOCGMIIPHY, "SIOCGMIIPHY", &data);
+ if (!error) {
+ /* data.phy_id is filled out by previous SIOCGMIIPHY miimon call. */
+ data.reg_num = MII_BMSR;
+ error = netdev_linux_do_miimon(name, SIOCGMIIREG, "SIOCGMIIREG",
+ &data);
+
+ if (!error) {
+ *miimon = !!(data.val_out & BMSR_LSTATUS);
+ } else {
+ VLOG_WARN_RL(&rl, "%s: failed to query MII", name);
+ }
+ } else {
+ struct ethtool_cmd ecmd;
+
+ VLOG_DBG_RL(&rl, "%s: failed to query MII, falling back to ethtool",
+ name);
+
+ COVERAGE_INC(netdev_get_ethtool);
+ memset(&ecmd, 0, sizeof ecmd);
+ error = netdev_linux_do_ethtool(name, &ecmd, ETHTOOL_GLINK,
+ "ETHTOOL_GLINK");
+ if (!error) {
+ struct ethtool_value eval;
+
+ memcpy(&eval, &ecmd, sizeof eval);
+ *miimon = !!eval.data;
+ } else {
+ VLOG_WARN_RL(&rl, "%s: ethtool link status failed", name);
+ }
+ }
+
+ return error;
+}
+
+static int
+netdev_linux_set_miimon_interval(struct netdev *netdev_,
+ long long int interval)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+
+ ovs_mutex_lock(&netdev->mutex);
+ interval = interval > 0 ? MAX(interval, 100) : 0;
+ if (netdev->miimon_interval != interval) {
+ int junk;
+
+ if (interval && !netdev->miimon_interval) {
+ atomic_add(&miimon_cnt, 1, &junk);
+ } else if (!interval && netdev->miimon_interval) {
+ atomic_sub(&miimon_cnt, 1, &junk);
+ }
+
+ netdev->miimon_interval = interval;
+ timer_set_expired(&netdev->miimon_timer);
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return 0;
+}
+
+static void
+netdev_linux_miimon_run(void)
+{
+ struct shash device_shash;
+ struct shash_node *node;
+
+ shash_init(&device_shash);
+ netdev_get_devices(&netdev_linux_class, &device_shash);
+ SHASH_FOR_EACH (node, &device_shash) {
+ struct netdev *netdev = node->data;
+ struct netdev_linux *dev = netdev_linux_cast(netdev);
+ bool miimon;
+
+ ovs_mutex_lock(&dev->mutex);
+ if (dev->miimon_interval > 0 && timer_expired(&dev->miimon_timer)) {
+ netdev_linux_get_miimon(dev->up.name, &miimon);
+ if (miimon != dev->miimon) {
+ dev->miimon = miimon;
+ netdev_linux_changed(dev, dev->ifi_flags, 0);
}
+
+ timer_set_duration(&dev->miimon_timer, dev->miimon_interval);
}
+ ovs_mutex_unlock(&dev->mutex);
+ netdev_close(netdev);
+ }
+
+ shash_destroy(&device_shash);
+}
+
+static void
+netdev_linux_miimon_wait(void)
+{
+ struct shash device_shash;
+ struct shash_node *node;
- netdev_dev->cache_valid |= VALID_IS_INTERNAL;
+ shash_init(&device_shash);
+ netdev_get_devices(&netdev_linux_class, &device_shash);
+ SHASH_FOR_EACH (node, &device_shash) {
+ struct netdev *netdev = node->data;
+ struct netdev_linux *dev = netdev_linux_cast(netdev);
+
+ ovs_mutex_lock(&dev->mutex);
+ if (dev->miimon_interval > 0) {
+ timer_wait(&dev->miimon_timer);
+ }
+ ovs_mutex_unlock(&dev->mutex);
+ netdev_close(netdev);
}
+ shash_destroy(&device_shash);
+}
+
+static void
+swap_uint64(uint64_t *a, uint64_t *b)
+{
+ uint64_t tmp = *a;
+ *a = *b;
+ *b = tmp;
+}
+
+/* Copies 'src' into 'dst', performing format conversion in the process.
+ *
+ * 'src' is allowed to be misaligned. */
+static void
+netdev_stats_from_ovs_vport_stats(struct netdev_stats *dst,
+ const struct ovs_vport_stats *src)
+{
+ dst->rx_packets = get_unaligned_u64(&src->rx_packets);
+ dst->tx_packets = get_unaligned_u64(&src->tx_packets);
+ dst->rx_bytes = get_unaligned_u64(&src->rx_bytes);
+ dst->tx_bytes = get_unaligned_u64(&src->tx_bytes);
+ dst->rx_errors = get_unaligned_u64(&src->rx_errors);
+ dst->tx_errors = get_unaligned_u64(&src->tx_errors);
+ dst->rx_dropped = get_unaligned_u64(&src->rx_dropped);
+ dst->tx_dropped = get_unaligned_u64(&src->tx_dropped);
+ dst->multicast = 0;
+ dst->collisions = 0;
+ dst->rx_length_errors = 0;
+ dst->rx_over_errors = 0;
+ dst->rx_crc_errors = 0;
+ dst->rx_frame_errors = 0;
+ dst->rx_fifo_errors = 0;
+ dst->rx_missed_errors = 0;
+ dst->tx_aborted_errors = 0;
+ dst->tx_carrier_errors = 0;
+ dst->tx_fifo_errors = 0;
+ dst->tx_heartbeat_errors = 0;
+ dst->tx_window_errors = 0;
+}
+
+static int
+get_stats_via_vport__(const struct netdev *netdev, struct netdev_stats *stats)
+{
+ struct dpif_linux_vport reply;
+ struct ofpbuf *buf;
+ int error;
- if (netdev_dev->is_internal) {
- collect_stats = &raw_stats;
+ error = dpif_linux_vport_get(netdev_get_name(netdev), &reply, &buf);
+ if (error) {
+ return error;
+ } else if (!reply.stats) {
+ ofpbuf_delete(buf);
+ return EOPNOTSUPP;
}
- if (use_netlink_stats < 0) {
- use_netlink_stats = check_for_working_netlink_stats();
+ netdev_stats_from_ovs_vport_stats(stats, reply.stats);
+
+ ofpbuf_delete(buf);
+
+ return 0;
+}
+
+static void
+get_stats_via_vport(const struct netdev *netdev_,
+ struct netdev_stats *stats)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+
+ if (!netdev->vport_stats_error ||
+ !(netdev->cache_valid & VALID_VPORT_STAT_ERROR)) {
+ int error;
+
+ error = get_stats_via_vport__(netdev_, stats);
+ if (error && error != ENOENT) {
+ VLOG_WARN_RL(&rl, "%s: obtaining netdev stats via vport failed "
+ "(%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
+ }
+ netdev->vport_stats_error = error;
+ netdev->cache_valid |= VALID_VPORT_STAT_ERROR;
}
- if (use_netlink_stats) {
- int ifindex;
+}
- error = get_ifindex(netdev_, &ifindex);
- if (!error) {
- error = get_stats_via_netlink(ifindex, collect_stats);
+/* Retrieves current device stats for 'netdev-linux'. */
+static int
+netdev_linux_get_stats(const struct netdev *netdev_,
+ struct netdev_stats *stats)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct netdev_stats dev_stats;
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ get_stats_via_vport(netdev_, stats);
+ error = get_stats_via_netlink(netdev_, &dev_stats);
+ if (error) {
+ if (!netdev->vport_stats_error) {
+ error = 0;
}
+ } else if (netdev->vport_stats_error) {
+ /* stats not available from OVS then use ioctl stats. */
+ *stats = dev_stats;
} else {
- error = get_stats_via_proc(netdev_get_name(netdev_), collect_stats);
- }
-
- /* If this port is an internal port then the transmit and receive stats
- * will appear to be swapped relative to the other ports since we are the
- * one sending the data, not a remote computer. For consistency, we swap
- * them back here. */
- if (!error && netdev_dev->is_internal) {
- stats->rx_packets = raw_stats.tx_packets;
- stats->tx_packets = raw_stats.rx_packets;
- stats->rx_bytes = raw_stats.tx_bytes;
- stats->tx_bytes = raw_stats.rx_bytes;
- stats->rx_errors = raw_stats.tx_errors;
- stats->tx_errors = raw_stats.rx_errors;
- stats->rx_dropped = raw_stats.tx_dropped;
- stats->tx_dropped = raw_stats.rx_dropped;
- stats->multicast = raw_stats.multicast;
- stats->collisions = raw_stats.collisions;
+ stats->rx_errors += dev_stats.rx_errors;
+ stats->tx_errors += dev_stats.tx_errors;
+ stats->rx_dropped += dev_stats.rx_dropped;
+ stats->tx_dropped += dev_stats.tx_dropped;
+ stats->multicast += dev_stats.multicast;
+ stats->collisions += dev_stats.collisions;
+ stats->rx_length_errors += dev_stats.rx_length_errors;
+ stats->rx_over_errors += dev_stats.rx_over_errors;
+ stats->rx_crc_errors += dev_stats.rx_crc_errors;
+ stats->rx_frame_errors += dev_stats.rx_frame_errors;
+ stats->rx_fifo_errors += dev_stats.rx_fifo_errors;
+ stats->rx_missed_errors += dev_stats.rx_missed_errors;
+ stats->tx_aborted_errors += dev_stats.tx_aborted_errors;
+ stats->tx_carrier_errors += dev_stats.tx_carrier_errors;
+ stats->tx_fifo_errors += dev_stats.tx_fifo_errors;
+ stats->tx_heartbeat_errors += dev_stats.tx_heartbeat_errors;
+ stats->tx_window_errors += dev_stats.tx_window_errors;
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+/* Retrieves current device stats for 'netdev-tap' netdev or
+ * netdev-internal. */
+static int
+netdev_tap_get_stats(const struct netdev *netdev_, struct netdev_stats *stats)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct netdev_stats dev_stats;
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ get_stats_via_vport(netdev_, stats);
+ error = get_stats_via_netlink(netdev_, &dev_stats);
+ if (error) {
+ if (!netdev->vport_stats_error) {
+ error = 0;
+ }
+ } else if (netdev->vport_stats_error) {
+ /* Transmit and receive stats will appear to be swapped relative to the
+ * other ports since we are the one sending the data, not a remote
+ * computer. For consistency, we swap them back here. This does not
+ * apply if we are getting stats from the vport layer because it always
+ * tracks stats from the perspective of the switch. */
+
+ *stats = dev_stats;
+ swap_uint64(&stats->rx_packets, &stats->tx_packets);
+ swap_uint64(&stats->rx_bytes, &stats->tx_bytes);
+ swap_uint64(&stats->rx_errors, &stats->tx_errors);
+ swap_uint64(&stats->rx_dropped, &stats->tx_dropped);
stats->rx_length_errors = 0;
stats->rx_over_errors = 0;
stats->rx_crc_errors = 0;
stats->tx_fifo_errors = 0;
stats->tx_heartbeat_errors = 0;
stats->tx_window_errors = 0;
+ } else {
+ stats->rx_dropped += dev_stats.tx_dropped;
+ stats->tx_dropped += dev_stats.rx_dropped;
+
+ stats->rx_errors += dev_stats.tx_errors;
+ stats->tx_errors += dev_stats.rx_errors;
+
+ stats->multicast += dev_stats.multicast;
+ stats->collisions += dev_stats.collisions;
}
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_internal_get_stats(const struct netdev *netdev_,
+ struct netdev_stats *stats)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ get_stats_via_vport(netdev_, stats);
+ error = netdev->vport_stats_error;
+ ovs_mutex_unlock(&netdev->mutex);
return 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. */
static int
-netdev_linux_get_features(struct netdev *netdev,
- uint32_t *current, uint32_t *advertised,
- uint32_t *supported, uint32_t *peer)
+netdev_internal_set_stats(struct netdev *netdev,
+ const struct netdev_stats *stats)
+{
+ struct ovs_vport_stats vport_stats;
+ struct dpif_linux_vport vport;
+ int err;
+
+ vport_stats.rx_packets = stats->rx_packets;
+ vport_stats.tx_packets = stats->tx_packets;
+ vport_stats.rx_bytes = stats->rx_bytes;
+ vport_stats.tx_bytes = stats->tx_bytes;
+ vport_stats.rx_errors = stats->rx_errors;
+ vport_stats.tx_errors = stats->tx_errors;
+ vport_stats.rx_dropped = stats->rx_dropped;
+ vport_stats.tx_dropped = stats->tx_dropped;
+
+ dpif_linux_vport_init(&vport);
+ vport.cmd = OVS_VPORT_CMD_SET;
+ vport.name = netdev_get_name(netdev);
+ vport.stats = &vport_stats;
+
+ err = dpif_linux_vport_transact(&vport, NULL, NULL);
+
+ /* If the vport layer doesn't know about the device, that doesn't mean it
+ * doesn't exist (after all were able to open it when netdev_open() was
+ * called), it just means that it isn't attached and we'll be getting
+ * stats a different way. */
+ if (err == ENODEV) {
+ err = EOPNOTSUPP;
+ }
+
+ return err;
+}
+
+static void
+netdev_linux_read_features(struct netdev_linux *netdev)
{
struct ethtool_cmd ecmd;
+ uint32_t speed;
int error;
+ if (netdev->cache_valid & VALID_FEATURES) {
+ return;
+ }
+
+ COVERAGE_INC(netdev_get_ethtool);
memset(&ecmd, 0, sizeof ecmd);
- error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd,
+ error = netdev_linux_do_ethtool(netdev->up.name, &ecmd,
ETHTOOL_GSET, "ETHTOOL_GSET");
if (error) {
- return error;
+ goto out;
}
/* Supported features. */
- *supported = 0;
+ netdev->supported = 0;
if (ecmd.supported & SUPPORTED_10baseT_Half) {
- *supported |= OFPPF_10MB_HD;
+ netdev->supported |= NETDEV_F_10MB_HD;
}
if (ecmd.supported & SUPPORTED_10baseT_Full) {
- *supported |= OFPPF_10MB_FD;
+ netdev->supported |= NETDEV_F_10MB_FD;
}
if (ecmd.supported & SUPPORTED_100baseT_Half) {
- *supported |= OFPPF_100MB_HD;
+ netdev->supported |= NETDEV_F_100MB_HD;
}
if (ecmd.supported & SUPPORTED_100baseT_Full) {
- *supported |= OFPPF_100MB_FD;
+ netdev->supported |= NETDEV_F_100MB_FD;
}
if (ecmd.supported & SUPPORTED_1000baseT_Half) {
- *supported |= OFPPF_1GB_HD;
+ netdev->supported |= NETDEV_F_1GB_HD;
}
if (ecmd.supported & SUPPORTED_1000baseT_Full) {
- *supported |= OFPPF_1GB_FD;
+ netdev->supported |= NETDEV_F_1GB_FD;
}
if (ecmd.supported & SUPPORTED_10000baseT_Full) {
- *supported |= OFPPF_10GB_FD;
+ netdev->supported |= NETDEV_F_10GB_FD;
}
if (ecmd.supported & SUPPORTED_TP) {
- *supported |= OFPPF_COPPER;
+ netdev->supported |= NETDEV_F_COPPER;
}
if (ecmd.supported & SUPPORTED_FIBRE) {
- *supported |= OFPPF_FIBER;
+ netdev->supported |= NETDEV_F_FIBER;
}
if (ecmd.supported & SUPPORTED_Autoneg) {
- *supported |= OFPPF_AUTONEG;
+ netdev->supported |= NETDEV_F_AUTONEG;
}
if (ecmd.supported & SUPPORTED_Pause) {
- *supported |= OFPPF_PAUSE;
+ netdev->supported |= NETDEV_F_PAUSE;
}
if (ecmd.supported & SUPPORTED_Asym_Pause) {
- *supported |= OFPPF_PAUSE_ASYM;
+ netdev->supported |= NETDEV_F_PAUSE_ASYM;
}
/* Advertised features. */
- *advertised = 0;
+ netdev->advertised = 0;
if (ecmd.advertising & ADVERTISED_10baseT_Half) {
- *advertised |= OFPPF_10MB_HD;
+ netdev->advertised |= NETDEV_F_10MB_HD;
}
if (ecmd.advertising & ADVERTISED_10baseT_Full) {
- *advertised |= OFPPF_10MB_FD;
+ netdev->advertised |= NETDEV_F_10MB_FD;
}
if (ecmd.advertising & ADVERTISED_100baseT_Half) {
- *advertised |= OFPPF_100MB_HD;
+ netdev->advertised |= NETDEV_F_100MB_HD;
}
if (ecmd.advertising & ADVERTISED_100baseT_Full) {
- *advertised |= OFPPF_100MB_FD;
+ netdev->advertised |= NETDEV_F_100MB_FD;
}
if (ecmd.advertising & ADVERTISED_1000baseT_Half) {
- *advertised |= OFPPF_1GB_HD;
+ netdev->advertised |= NETDEV_F_1GB_HD;
}
if (ecmd.advertising & ADVERTISED_1000baseT_Full) {
- *advertised |= OFPPF_1GB_FD;
+ netdev->advertised |= NETDEV_F_1GB_FD;
}
if (ecmd.advertising & ADVERTISED_10000baseT_Full) {
- *advertised |= OFPPF_10GB_FD;
+ netdev->advertised |= NETDEV_F_10GB_FD;
}
if (ecmd.advertising & ADVERTISED_TP) {
- *advertised |= OFPPF_COPPER;
+ netdev->advertised |= NETDEV_F_COPPER;
}
if (ecmd.advertising & ADVERTISED_FIBRE) {
- *advertised |= OFPPF_FIBER;
+ netdev->advertised |= NETDEV_F_FIBER;
}
if (ecmd.advertising & ADVERTISED_Autoneg) {
- *advertised |= OFPPF_AUTONEG;
+ netdev->advertised |= NETDEV_F_AUTONEG;
}
if (ecmd.advertising & ADVERTISED_Pause) {
- *advertised |= OFPPF_PAUSE;
+ netdev->advertised |= NETDEV_F_PAUSE;
}
if (ecmd.advertising & ADVERTISED_Asym_Pause) {
- *advertised |= OFPPF_PAUSE_ASYM;
+ netdev->advertised |= NETDEV_F_PAUSE_ASYM;
}
/* Current settings. */
- 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;
+ speed = ecmd.speed;
+ if (speed == SPEED_10) {
+ netdev->current = ecmd.duplex ? NETDEV_F_10MB_FD : NETDEV_F_10MB_HD;
+ } else if (speed == SPEED_100) {
+ netdev->current = ecmd.duplex ? NETDEV_F_100MB_FD : NETDEV_F_100MB_HD;
+ } else if (speed == SPEED_1000) {
+ netdev->current = ecmd.duplex ? NETDEV_F_1GB_FD : NETDEV_F_1GB_HD;
+ } else if (speed == SPEED_10000) {
+ netdev->current = NETDEV_F_10GB_FD;
+ } else if (speed == 40000) {
+ netdev->current = NETDEV_F_40GB_FD;
+ } else if (speed == 100000) {
+ netdev->current = NETDEV_F_100GB_FD;
+ } else if (speed == 1000000) {
+ netdev->current = NETDEV_F_1TB_FD;
} else {
- *current = 0;
+ netdev->current = 0;
}
if (ecmd.port == PORT_TP) {
- *current |= OFPPF_COPPER;
+ netdev->current |= NETDEV_F_COPPER;
} else if (ecmd.port == PORT_FIBRE) {
- *current |= OFPPF_FIBER;
+ netdev->current |= NETDEV_F_FIBER;
}
if (ecmd.autoneg) {
- *current |= OFPPF_AUTONEG;
+ netdev->current |= NETDEV_F_AUTONEG;
}
- /* Peer advertisements. */
- *peer = 0; /* XXX */
+out:
+ netdev->cache_valid |= VALID_FEATURES;
+ netdev->get_features_error = error;
+}
+
+/* Stores the features supported by 'netdev' into of '*current', '*advertised',
+ * '*supported', and '*peer'. Each value is a bitmap of NETDEV_* bits.
+ * Returns 0 if successful, otherwise a positive errno value. */
+static int
+netdev_linux_get_features(const struct netdev *netdev_,
+ enum netdev_features *current,
+ enum netdev_features *advertised,
+ enum netdev_features *supported,
+ enum netdev_features *peer)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ netdev_linux_read_features(netdev);
+ if (!netdev->get_features_error) {
+ *current = netdev->current;
+ *advertised = netdev->advertised;
+ *supported = netdev->supported;
+ *peer = 0; /* XXX */
+ }
+ error = netdev->get_features_error;
+ ovs_mutex_unlock(&netdev->mutex);
- return 0;
+ return error;
}
/* Set the features advertised by 'netdev' to 'advertise'. */
static int
-netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise)
+netdev_linux_set_advertisements(struct netdev *netdev_,
+ enum netdev_features advertise)
{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
struct ethtool_cmd ecmd;
int error;
+ ovs_mutex_lock(&netdev->mutex);
+
+ COVERAGE_INC(netdev_get_ethtool);
memset(&ecmd, 0, sizeof ecmd);
- error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd,
+ error = netdev_linux_do_ethtool(netdev_get_name(netdev_), &ecmd,
ETHTOOL_GSET, "ETHTOOL_GSET");
if (error) {
- return error;
+ goto exit;
}
ecmd.advertising = 0;
- if (advertise & OFPPF_10MB_HD) {
+ if (advertise & NETDEV_F_10MB_HD) {
ecmd.advertising |= ADVERTISED_10baseT_Half;
}
- if (advertise & OFPPF_10MB_FD) {
+ if (advertise & NETDEV_F_10MB_FD) {
ecmd.advertising |= ADVERTISED_10baseT_Full;
}
- if (advertise & OFPPF_100MB_HD) {
+ if (advertise & NETDEV_F_100MB_HD) {
ecmd.advertising |= ADVERTISED_100baseT_Half;
}
- if (advertise & OFPPF_100MB_FD) {
+ if (advertise & NETDEV_F_100MB_FD) {
ecmd.advertising |= ADVERTISED_100baseT_Full;
}
- if (advertise & OFPPF_1GB_HD) {
+ if (advertise & NETDEV_F_1GB_HD) {
ecmd.advertising |= ADVERTISED_1000baseT_Half;
}
- if (advertise & OFPPF_1GB_FD) {
+ if (advertise & NETDEV_F_1GB_FD) {
ecmd.advertising |= ADVERTISED_1000baseT_Full;
}
- if (advertise & OFPPF_10GB_FD) {
+ if (advertise & NETDEV_F_10GB_FD) {
ecmd.advertising |= ADVERTISED_10000baseT_Full;
}
- if (advertise & OFPPF_COPPER) {
+ if (advertise & NETDEV_F_COPPER) {
ecmd.advertising |= ADVERTISED_TP;
}
- if (advertise & OFPPF_FIBER) {
+ if (advertise & NETDEV_F_FIBER) {
ecmd.advertising |= ADVERTISED_FIBRE;
}
- if (advertise & OFPPF_AUTONEG) {
+ if (advertise & NETDEV_F_AUTONEG) {
ecmd.advertising |= ADVERTISED_Autoneg;
}
- if (advertise & OFPPF_PAUSE) {
+ if (advertise & NETDEV_F_PAUSE) {
ecmd.advertising |= ADVERTISED_Pause;
}
- if (advertise & OFPPF_PAUSE_ASYM) {
+ if (advertise & NETDEV_F_PAUSE_ASYM) {
ecmd.advertising |= ADVERTISED_Asym_Pause;
}
- return netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd,
- ETHTOOL_SSET, "ETHTOOL_SSET");
+ COVERAGE_INC(netdev_set_ethtool);
+ error = netdev_linux_do_ethtool(netdev_get_name(netdev_), &ecmd,
+ ETHTOOL_SSET, "ETHTOOL_SSET");
+
+exit:
+ ovs_mutex_unlock(&netdev->mutex);
+ return error;
}
-/* 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. */
+/* Attempts to set input rate limiting (policing) policy. Returns 0 if
+ * successful, otherwise a positive errno value. */
static int
-netdev_linux_get_vlan_vid(const struct netdev *netdev, int *vlan_vid)
+netdev_linux_set_policing(struct netdev *netdev_,
+ uint32_t kbits_rate, uint32_t kbits_burst)
{
- const char *netdev_name = netdev_get_name(netdev);
- struct ds line = DS_EMPTY_INITIALIZER;
- FILE *stream = NULL;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ const char *netdev_name = netdev_get_name(netdev_);
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;
- }
- 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);
+ kbits_burst = (!kbits_rate ? 0 /* Force to 0 if no rate specified. */
+ : !kbits_burst ? 1000 /* Default to 1000 kbits if 0. */
+ : kbits_burst); /* Stick with user-specified value. */
+
+ ovs_mutex_lock(&netdev->mutex);
+ if (netdev->cache_valid & VALID_POLICING) {
+ error = netdev->netdev_policing_error;
+ if (error || (netdev->kbits_rate == kbits_rate &&
+ netdev->kbits_burst == kbits_burst)) {
+ /* Assume that settings haven't changed since we last set them. */
+ goto out;
}
- goto done;
- }
-
- 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;
+ netdev->cache_valid &= ~VALID_POLICING;
}
- error = 0;
-
-done:
- free(fn);
- if (stream) {
- fclose(stream);
- }
- ds_destroy(&line);
+ COVERAGE_INC(netdev_set_policing);
+ /* Remove any existing ingress qdisc. */
+ error = tc_add_del_ingress_qdisc(netdev_, false);
if (error) {
- *vlan_vid = -1;
+ VLOG_WARN_RL(&rl, "%s: removing policing failed: %s",
+ netdev_name, ovs_strerror(error));
+ goto out;
}
- 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. */
-static int
-netdev_linux_set_policing(struct netdev *netdev,
- uint32_t kbits_rate, uint32_t kbits_burst)
-{
- const char *netdev_name = netdev_get_name(netdev);
- char command[1024];
- COVERAGE_INC(netdev_set_policing);
if (kbits_rate) {
- if (!kbits_burst) {
- /* Default to 1000 kilobits if not specified. */
- kbits_burst = 1000;
+ error = tc_add_del_ingress_qdisc(netdev_, true);
+ if (error) {
+ VLOG_WARN_RL(&rl, "%s: adding policing qdisc failed: %s",
+ netdev_name, ovs_strerror(error));
+ goto out;
}
- /* 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);
+ error = tc_add_policer(netdev_, kbits_rate, kbits_burst);
+ if (error){
+ VLOG_WARN_RL(&rl, "%s: adding policing action failed: %s",
+ netdev_name, ovs_strerror(error));
+ goto out;
}
+ }
- 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;
- }
+ netdev->kbits_rate = kbits_rate;
+ netdev->kbits_burst = kbits_burst;
- 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);
- }
+out:
+ if (!error || error == ENODEV) {
+ netdev->netdev_policing_error = error;
+ netdev->cache_valid |= VALID_POLICING;
}
-
- return 0;
+ ovs_mutex_unlock(&netdev->mutex);
+ return error;
}
static int
-netdev_linux_get_in4(const struct netdev *netdev_,
- struct in_addr *address, struct in_addr *netmask)
+netdev_linux_get_qos_types(const struct netdev *netdev OVS_UNUSED,
+ struct sset *types)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
-
- if (!(netdev_dev->cache_valid & VALID_IN4)) {
- int error;
-
- error = netdev_linux_get_ipv4(netdev_, &netdev_dev->address,
- SIOCGIFADDR, "SIOCGIFADDR");
- if (error) {
- return error;
- }
+ const struct tc_ops *const *opsp;
- error = netdev_linux_get_ipv4(netdev_, &netdev_dev->netmask,
- SIOCGIFNETMASK, "SIOCGIFNETMASK");
- if (error) {
- return error;
+ for (opsp = tcs; *opsp != NULL; opsp++) {
+ const struct tc_ops *ops = *opsp;
+ if (ops->tc_install && ops->ovs_name[0] != '\0') {
+ sset_add(types, ops->ovs_name);
}
-
- netdev_dev->cache_valid |= VALID_IN4;
}
- *address = netdev_dev->address;
- *netmask = netdev_dev->netmask;
- return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0;
+ return 0;
}
-static int
-netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address,
- struct in_addr netmask)
+static const struct tc_ops *
+tc_lookup_ovs_name(const char *name)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- int error;
+ const struct tc_ops *const *opsp;
- error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address);
- if (!error) {
- netdev_dev->cache_valid |= VALID_IN4;
- netdev_dev->address = address;
- netdev_dev->netmask = netmask;
- if (address.s_addr != INADDR_ANY) {
- error = do_set_addr(netdev_, SIOCSIFNETMASK,
- "SIOCSIFNETMASK", netmask);
+ for (opsp = tcs; *opsp != NULL; opsp++) {
+ const struct tc_ops *ops = *opsp;
+ if (!strcmp(name, ops->ovs_name)) {
+ return ops;
}
}
- return error;
+ return NULL;
}
-static bool
-parse_if_inet6_line(const char *line,
- struct in6_addr *in6, char ifname[16 + 1])
+static const struct tc_ops *
+tc_lookup_linux_name(const char *name)
{
- uint8_t *s6 = in6->s6_addr;
-#define X8 "%2"SCNx8
- return 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;
+ const struct tc_ops *const *opsp;
+
+ for (opsp = tcs; *opsp != NULL; opsp++) {
+ const struct tc_ops *ops = *opsp;
+ if (ops->linux_name && !strcmp(name, ops->linux_name)) {
+ return ops;
+ }
+ }
+ return NULL;
}
-/* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
- * 'in6' is non-null) and returns true. Otherwise, returns false. */
-static int
-netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6)
+static struct tc_queue *
+tc_find_queue__(const struct netdev *netdev_, unsigned int queue_id,
+ size_t hash)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- if (!(netdev_dev->cache_valid & VALID_IN6)) {
- FILE *file;
- char line[128];
-
- netdev_dev->in6 = in6addr_any;
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct tc_queue *queue;
- file = fopen("/proc/net/if_inet6", "r");
- if (file != NULL) {
- const char *name = netdev_get_name(netdev_);
- while (fgets(line, sizeof line, file)) {
- struct in6_addr in6;
- char ifname[16 + 1];
- if (parse_if_inet6_line(line, &in6, ifname)
- && !strcmp(name, ifname))
- {
- netdev_dev->in6 = in6;
- break;
- }
- }
- fclose(file);
+ HMAP_FOR_EACH_IN_BUCKET (queue, hmap_node, hash, &netdev->tc->queues) {
+ if (queue->queue_id == queue_id) {
+ return queue;
}
- netdev_dev->cache_valid |= VALID_IN6;
}
- *in6 = netdev_dev->in6;
- return 0;
+ return NULL;
}
-static void
-make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
+static struct tc_queue *
+tc_find_queue(const struct netdev *netdev, unsigned int queue_id)
{
- 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 tc_find_queue__(netdev, queue_id, hash_int(queue_id, 0));
}
static int
-do_set_addr(struct netdev *netdev,
- int ioctl_nr, const char *ioctl_name, struct in_addr addr)
+netdev_linux_get_qos_capabilities(const struct netdev *netdev OVS_UNUSED,
+ const char *type,
+ struct netdev_qos_capabilities *caps)
{
- struct ifreq ifr;
- strncpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name);
- make_in4_sockaddr(&ifr.ifr_addr, addr);
-
- return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, ioctl_nr,
- ioctl_name);
+ const struct tc_ops *ops = tc_lookup_ovs_name(type);
+ if (!ops) {
+ return EOPNOTSUPP;
+ }
+ caps->n_queues = ops->n_queues;
+ return 0;
}
-/* Adds 'router' as a default IP gateway. */
static int
-netdev_linux_add_router(struct netdev *netdev UNUSED, struct in_addr router)
+netdev_linux_get_qos(const struct netdev *netdev_,
+ const char **typep, struct smap *details)
{
- struct in_addr any = { INADDR_ANY };
- struct rtentry rt;
+ struct netdev_linux *netdev = netdev_linux_cast(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;
- if (error) {
- VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error));
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ *typep = netdev->tc->ops->ovs_name;
+ error = (netdev->tc->ops->qdisc_get
+ ? netdev->tc->ops->qdisc_get(netdev_, details)
+ : 0);
}
+ ovs_mutex_unlock(&netdev->mutex);
+
return error;
}
static int
-netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop,
- char **netdev_name)
+netdev_linux_set_qos(struct netdev *netdev_,
+ const char *type, const struct smap *details)
{
- static const char fn[] = "/proc/net/route";
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ const struct tc_ops *new_ops;
+ int error;
+
+ new_ops = tc_lookup_ovs_name(type);
+ if (!new_ops || !new_ops->tc_install) {
+ return EOPNOTSUPP;
+ }
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (error) {
+ goto exit;
+ }
+
+ if (new_ops == netdev->tc->ops) {
+ error = new_ops->qdisc_set ? new_ops->qdisc_set(netdev_, details) : 0;
+ } else {
+ /* Delete existing qdisc. */
+ error = tc_del_qdisc(netdev_);
+ if (error) {
+ goto exit;
+ }
+ ovs_assert(netdev->tc == NULL);
+
+ /* Install new qdisc. */
+ error = new_ops->tc_install(netdev_, details);
+ ovs_assert((error == 0) == (netdev->tc != NULL));
+ }
+
+exit:
+ ovs_mutex_unlock(&netdev->mutex);
+ return error;
+}
+
+static int
+netdev_linux_get_queue(const struct netdev *netdev_,
+ unsigned int queue_id, struct smap *details)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ struct tc_queue *queue = tc_find_queue(netdev_, queue_id);
+ error = (queue
+ ? netdev->tc->ops->class_get(netdev_, queue, details)
+ : ENOENT);
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_set_queue(struct netdev *netdev_,
+ unsigned int queue_id, const struct smap *details)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ error = (queue_id < netdev->tc->ops->n_queues
+ && netdev->tc->ops->class_set
+ ? netdev->tc->ops->class_set(netdev_, queue_id, details)
+ : EINVAL);
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_delete_queue(struct netdev *netdev_, unsigned int queue_id)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ if (netdev->tc->ops->class_delete) {
+ struct tc_queue *queue = tc_find_queue(netdev_, queue_id);
+ error = (queue
+ ? netdev->tc->ops->class_delete(netdev_, queue)
+ : ENOENT);
+ } else {
+ error = EINVAL;
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_get_queue_stats(const struct netdev *netdev_,
+ unsigned int queue_id,
+ struct netdev_queue_stats *stats)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ if (netdev->tc->ops->class_get_stats) {
+ const struct tc_queue *queue = tc_find_queue(netdev_, queue_id);
+ if (queue) {
+ stats->created = queue->created;
+ error = netdev->tc->ops->class_get_stats(netdev_, queue,
+ stats);
+ } else {
+ error = ENOENT;
+ }
+ } else {
+ error = EOPNOTSUPP;
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+struct queue_dump_state {
+ struct nl_dump dump;
+ struct ofpbuf buf;
+};
+
+static bool
+start_queue_dump(const struct netdev *netdev, struct queue_dump_state *state)
+{
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+
+ tcmsg = tc_make_request(netdev, RTM_GETTCLASS, 0, &request);
+ if (!tcmsg) {
+ return false;
+ }
+ tcmsg->tcm_parent = 0;
+ nl_dump_start(&state->dump, NETLINK_ROUTE, &request);
+ ofpbuf_uninit(&request);
+
+ ofpbuf_init(&state->buf, NL_DUMP_BUFSIZE);
+ return true;
+}
+
+static int
+finish_queue_dump(struct queue_dump_state *state)
+{
+ ofpbuf_uninit(&state->buf);
+ return nl_dump_done(&state->dump);
+}
+
+struct netdev_linux_queue_state {
+ unsigned int *queues;
+ size_t cur_queue;
+ size_t n_queues;
+};
+
+static int
+netdev_linux_queue_dump_start(const struct netdev *netdev_, void **statep)
+{
+ const struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ if (netdev->tc->ops->class_get) {
+ struct netdev_linux_queue_state *state;
+ struct tc_queue *queue;
+ size_t i;
+
+ *statep = state = xmalloc(sizeof *state);
+ state->n_queues = hmap_count(&netdev->tc->queues);
+ state->cur_queue = 0;
+ state->queues = xmalloc(state->n_queues * sizeof *state->queues);
+
+ i = 0;
+ HMAP_FOR_EACH (queue, hmap_node, &netdev->tc->queues) {
+ state->queues[i++] = queue->queue_id;
+ }
+ } else {
+ error = EOPNOTSUPP;
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_queue_dump_next(const struct netdev *netdev_, void *state_,
+ unsigned int *queue_idp, struct smap *details)
+{
+ const struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct netdev_linux_queue_state *state = state_;
+ int error = EOF;
+
+ ovs_mutex_lock(&netdev->mutex);
+ while (state->cur_queue < state->n_queues) {
+ unsigned int queue_id = state->queues[state->cur_queue++];
+ struct tc_queue *queue = tc_find_queue(netdev_, queue_id);
+
+ if (queue) {
+ *queue_idp = queue_id;
+ error = netdev->tc->ops->class_get(netdev_, queue, details);
+ break;
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_queue_dump_done(const struct netdev *netdev OVS_UNUSED,
+ void *state_)
+{
+ struct netdev_linux_queue_state *state = state_;
+
+ free(state->queues);
+ free(state);
+ return 0;
+}
+
+static int
+netdev_linux_dump_queue_stats(const struct netdev *netdev_,
+ netdev_dump_queue_stats_cb *cb, void *aux)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = tc_query_qdisc(netdev_);
+ if (!error) {
+ struct queue_dump_state state;
+
+ if (!netdev->tc->ops->class_dump_stats) {
+ error = EOPNOTSUPP;
+ } else if (!start_queue_dump(netdev_, &state)) {
+ error = ENODEV;
+ } else {
+ struct ofpbuf msg;
+ int retval;
+
+ while (nl_dump_next(&state.dump, &msg, &state.buf)) {
+ retval = netdev->tc->ops->class_dump_stats(netdev_, &msg,
+ cb, aux);
+ if (retval) {
+ error = retval;
+ }
+ }
+
+ retval = finish_queue_dump(&state);
+ if (retval) {
+ error = retval;
+ }
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_get_in4(const struct netdev *netdev_,
+ struct in_addr *address, struct in_addr *netmask)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ if (!(netdev->cache_valid & VALID_IN4)) {
+ error = netdev_linux_get_ipv4(netdev_, &netdev->address,
+ SIOCGIFADDR, "SIOCGIFADDR");
+ if (!error) {
+ error = netdev_linux_get_ipv4(netdev_, &netdev->netmask,
+ SIOCGIFNETMASK, "SIOCGIFNETMASK");
+ if (!error) {
+ netdev->cache_valid |= VALID_IN4;
+ }
+ }
+ } else {
+ error = 0;
+ }
+
+ if (!error) {
+ if (netdev->address.s_addr != INADDR_ANY) {
+ *address = netdev->address;
+ *netmask = netdev->netmask;
+ } else {
+ error = EADDRNOTAVAIL;
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address,
+ struct in_addr netmask)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address);
+ if (!error) {
+ netdev->cache_valid |= VALID_IN4;
+ netdev->address = address;
+ netdev->netmask = netmask;
+ if (address.s_addr != INADDR_ANY) {
+ error = do_set_addr(netdev_, SIOCSIFNETMASK,
+ "SIOCSIFNETMASK", netmask);
+ }
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static bool
+parse_if_inet6_line(const char *line,
+ struct in6_addr *in6, char ifname[16 + 1])
+{
+ uint8_t *s6 = in6->s6_addr;
+#define X8 "%2"SCNx8
+ return ovs_scan(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);
+}
+
+/* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
+ * 'in6' is non-null) and returns true. Otherwise, returns false. */
+static int
+netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+
+ ovs_mutex_lock(&netdev->mutex);
+ if (!(netdev->cache_valid & VALID_IN6)) {
+ FILE *file;
+ char line[128];
+
+ netdev->in6 = in6addr_any;
+
+ file = fopen("/proc/net/if_inet6", "r");
+ if (file != NULL) {
+ const char *name = netdev_get_name(netdev_);
+ while (fgets(line, sizeof line, file)) {
+ struct in6_addr in6_tmp;
+ char ifname[16 + 1];
+ if (parse_if_inet6_line(line, &in6_tmp, ifname)
+ && !strcmp(name, ifname))
+ {
+ netdev->in6 = in6_tmp;
+ break;
+ }
+ }
+ fclose(file);
+ }
+ netdev->cache_valid |= VALID_IN6;
+ }
+ *in6 = netdev->in6;
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return 0;
+}
+
+static void
+make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
+{
+ 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);
+}
+
+static int
+do_set_addr(struct netdev *netdev,
+ int ioctl_nr, const char *ioctl_name, struct in_addr addr)
+{
+ struct ifreq ifr;
+
+ make_in4_sockaddr(&ifr.ifr_addr, addr);
+ return af_inet_ifreq_ioctl(netdev_get_name(netdev), &ifr, ioctl_nr,
+ ioctl_name);
+}
+
+/* Adds 'router' as a default IP gateway. */
+static int
+netdev_linux_add_router(struct netdev *netdev OVS_UNUSED, struct in_addr router)
+{
+ struct in_addr any = { INADDR_ANY };
+ struct rtentry rt;
+ 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;
+ error = af_inet_ioctl(SIOCADDRT, &rt);
+ if (error) {
+ VLOG_WARN("ioctl(SIOCADDRT): %s", ovs_strerror(error));
+ }
+ return error;
+}
+
+static int
+netdev_linux_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));
+ VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, ovs_strerror(errno));
return errno;
}
while (fgets(line, sizeof line, stream)) {
if (++ln >= 2) {
char iface[17];
- uint32_t dest, gateway, mask;
+ ovs_be32 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",
+ if (!ovs_scan(line,
+ "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32
+ " %d %u %u\n",
+ iface, &dest, &gateway, &flags, &refcnt,
+ &use, &metric, &mask, &mtu, &window, &irtt)) {
+ VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s",
fn, ln, line);
continue;
}
}
/* The output of 'dest', 'mask', and 'gateway' were given in
- * network byte order, so we don't need need any endian
+ * network byte order, so we don't need need any endian
* conversions here. */
if ((dest & mask) == (host->s_addr & mask)) {
if (!gateway) {
return ENXIO;
}
-/* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
+static int
+netdev_linux_get_status(const struct netdev *netdev_, struct smap *smap)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error = 0;
+
+ ovs_mutex_lock(&netdev->mutex);
+ if (!(netdev->cache_valid & VALID_DRVINFO)) {
+ struct ethtool_cmd *cmd = (struct ethtool_cmd *) &netdev->drvinfo;
+
+ COVERAGE_INC(netdev_get_ethtool);
+ memset(&netdev->drvinfo, 0, sizeof netdev->drvinfo);
+ error = netdev_linux_do_ethtool(netdev->up.name,
+ cmd,
+ ETHTOOL_GDRVINFO,
+ "ETHTOOL_GDRVINFO");
+ if (!error) {
+ netdev->cache_valid |= VALID_DRVINFO;
+ }
+ }
+
+ if (!error) {
+ smap_add(smap, "driver_name", netdev->drvinfo.driver);
+ smap_add(smap, "driver_version", netdev->drvinfo.version);
+ smap_add(smap, "firmware_version", netdev->drvinfo.fw_version);
+ }
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+static int
+netdev_internal_get_status(const struct netdev *netdev OVS_UNUSED,
+ struct smap *smap)
+{
+ smap_add(smap, "driver_name", "openvswitch");
+ return 0;
+}
+
+/* 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'. */
static int
netdev_linux_arp_lookup(const struct netdev *netdev,
- uint32_t ip, uint8_t mac[ETH_ADDR_LEN])
+ ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
{
struct arpreq r;
struct sockaddr_in sin;
int retval;
memset(&r, 0, sizeof r);
+ memset(&sin, 0, sizeof sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = ip;
sin.sin_port = 0;
memcpy(&r.arp_pa, &sin, sizeof sin);
r.arp_ha.sa_family = ARPHRD_ETHER;
r.arp_flags = 0;
- strncpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev);
+ ovs_strzcpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev);
COVERAGE_INC(netdev_arp_lookup);
- retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0;
+ retval = af_inet_ioctl(SIOCGARP, &r);
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_get_name(netdev), IP_ARGS(&ip), strerror(retval));
+ netdev_get_name(netdev), IP_ARGS(ip),
+ ovs_strerror(retval));
}
return retval;
}
if (nd & NETDEV_PROMISC) {
iff |= IFF_PROMISC;
}
+ if (nd & NETDEV_LOOPBACK) {
+ iff |= IFF_LOOPBACK;
+ }
return iff;
}
if (iff & IFF_PROMISC) {
nd |= NETDEV_PROMISC;
}
- return nd;
+ if (iff & IFF_LOOPBACK) {
+ nd |= NETDEV_LOOPBACK;
+ }
+ return nd;
+}
+
+static int
+update_flags(struct netdev_linux *netdev, enum netdev_flags off,
+ enum netdev_flags on, enum netdev_flags *old_flagsp)
+ OVS_REQUIRES(netdev->mutex)
+{
+ int old_flags, new_flags;
+ int error = 0;
+
+ old_flags = netdev->ifi_flags;
+ *old_flagsp = iff_to_nd_flags(old_flags);
+ new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
+ if (new_flags != old_flags) {
+ error = set_flags(netdev_get_name(&netdev->up), new_flags);
+ get_flags(&netdev->up, &netdev->ifi_flags);
+ }
+
+ return error;
+}
+
+static int
+netdev_linux_update_flags(struct netdev *netdev_, enum netdev_flags off,
+ enum netdev_flags on, enum netdev_flags *old_flagsp)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ int error;
+
+ ovs_mutex_lock(&netdev->mutex);
+ error = update_flags(netdev, off, on, old_flagsp);
+ ovs_mutex_unlock(&netdev->mutex);
+
+ return error;
+}
+
+#define NETDEV_LINUX_CLASS(NAME, CONSTRUCT, GET_STATS, SET_STATS, \
+ GET_FEATURES, GET_STATUS) \
+{ \
+ NAME, \
+ \
+ NULL, \
+ netdev_linux_run, \
+ netdev_linux_wait, \
+ \
+ netdev_linux_alloc, \
+ CONSTRUCT, \
+ netdev_linux_destruct, \
+ netdev_linux_dealloc, \
+ NULL, /* get_config */ \
+ NULL, /* set_config */ \
+ NULL, /* get_tunnel_config */ \
+ \
+ netdev_linux_send, \
+ netdev_linux_send_wait, \
+ \
+ netdev_linux_set_etheraddr, \
+ netdev_linux_get_etheraddr, \
+ netdev_linux_get_mtu, \
+ netdev_linux_set_mtu, \
+ netdev_linux_get_ifindex, \
+ netdev_linux_get_carrier, \
+ netdev_linux_get_carrier_resets, \
+ netdev_linux_set_miimon_interval, \
+ GET_STATS, \
+ SET_STATS, \
+ \
+ GET_FEATURES, \
+ netdev_linux_set_advertisements, \
+ \
+ netdev_linux_set_policing, \
+ netdev_linux_get_qos_types, \
+ netdev_linux_get_qos_capabilities, \
+ netdev_linux_get_qos, \
+ netdev_linux_set_qos, \
+ netdev_linux_get_queue, \
+ netdev_linux_set_queue, \
+ netdev_linux_delete_queue, \
+ netdev_linux_get_queue_stats, \
+ netdev_linux_queue_dump_start, \
+ netdev_linux_queue_dump_next, \
+ netdev_linux_queue_dump_done, \
+ netdev_linux_dump_queue_stats, \
+ \
+ netdev_linux_get_in4, \
+ netdev_linux_set_in4, \
+ netdev_linux_get_in6, \
+ netdev_linux_add_router, \
+ netdev_linux_get_next_hop, \
+ GET_STATUS, \
+ netdev_linux_arp_lookup, \
+ \
+ netdev_linux_update_flags, \
+ \
+ netdev_linux_rxq_alloc, \
+ netdev_linux_rxq_construct, \
+ netdev_linux_rxq_destruct, \
+ netdev_linux_rxq_dealloc, \
+ netdev_linux_rxq_recv, \
+ netdev_linux_rxq_wait, \
+ netdev_linux_rxq_drain, \
+}
+
+const struct netdev_class netdev_linux_class =
+ NETDEV_LINUX_CLASS(
+ "system",
+ netdev_linux_construct,
+ netdev_linux_get_stats,
+ NULL, /* set_stats */
+ netdev_linux_get_features,
+ netdev_linux_get_status);
+
+const struct netdev_class netdev_tap_class =
+ NETDEV_LINUX_CLASS(
+ "tap",
+ netdev_linux_construct_tap,
+ netdev_tap_get_stats,
+ NULL, /* set_stats */
+ netdev_linux_get_features,
+ netdev_linux_get_status);
+
+const struct netdev_class netdev_internal_class =
+ NETDEV_LINUX_CLASS(
+ "internal",
+ netdev_linux_construct,
+ netdev_internal_get_stats,
+ netdev_internal_set_stats,
+ NULL, /* get_features */
+ netdev_internal_get_status);
+\f
+/* HTB traffic control class. */
+
+#define HTB_N_QUEUES 0xf000
+
+struct htb {
+ struct tc tc;
+ unsigned int max_rate; /* In bytes/s. */
+};
+
+struct htb_class {
+ struct tc_queue tc_queue;
+ unsigned int min_rate; /* In bytes/s. */
+ unsigned int max_rate; /* In bytes/s. */
+ unsigned int burst; /* In bytes. */
+ unsigned int priority; /* Lower values are higher priorities. */
+};
+
+static struct htb *
+htb_get__(const struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ return CONTAINER_OF(netdev->tc, struct htb, tc);
+}
+
+static void
+htb_install__(struct netdev *netdev_, uint64_t max_rate)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct htb *htb;
+
+ htb = xmalloc(sizeof *htb);
+ tc_init(&htb->tc, &tc_ops_htb);
+ htb->max_rate = max_rate;
+
+ netdev->tc = &htb->tc;
+}
+
+/* Create an HTB qdisc.
+ *
+ * Equivalent to "tc qdisc add dev <dev> root handle 1: htb default 1". */
+static int
+htb_setup_qdisc__(struct netdev *netdev)
+{
+ size_t opt_offset;
+ struct tc_htb_glob opt;
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+
+ tc_del_qdisc(netdev);
+
+ tcmsg = tc_make_request(netdev, RTM_NEWQDISC,
+ NLM_F_EXCL | NLM_F_CREATE, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = tc_make_handle(1, 0);
+ tcmsg->tcm_parent = TC_H_ROOT;
+
+ nl_msg_put_string(&request, TCA_KIND, "htb");
+
+ memset(&opt, 0, sizeof opt);
+ opt.rate2quantum = 10;
+ opt.version = 3;
+ opt.defcls = 1;
+
+ opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS);
+ nl_msg_put_unspec(&request, TCA_HTB_INIT, &opt, sizeof opt);
+ nl_msg_end_nested(&request, opt_offset);
+
+ return tc_transact(&request, NULL);
+}
+
+/* Equivalent to "tc class replace <dev> classid <handle> parent <parent> htb
+ * rate <min_rate>bps ceil <max_rate>bps burst <burst>b prio <priority>". */
+static int
+htb_setup_class__(struct netdev *netdev, unsigned int handle,
+ unsigned int parent, struct htb_class *class)
+{
+ size_t opt_offset;
+ struct tc_htb_opt opt;
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+ int error;
+ int mtu;
+
+ error = netdev_linux_get_mtu__(netdev_linux_cast(netdev), &mtu);
+ if (error) {
+ VLOG_WARN_RL(&rl, "cannot set up HTB on device %s that lacks MTU",
+ netdev_get_name(netdev));
+ return error;
+ }
+
+ memset(&opt, 0, sizeof opt);
+ tc_fill_rate(&opt.rate, class->min_rate, mtu);
+ tc_fill_rate(&opt.ceil, class->max_rate, mtu);
+ opt.buffer = tc_calc_buffer(opt.rate.rate, mtu, class->burst);
+ opt.cbuffer = tc_calc_buffer(opt.ceil.rate, mtu, class->burst);
+ opt.prio = class->priority;
+
+ tcmsg = tc_make_request(netdev, RTM_NEWTCLASS, NLM_F_CREATE, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = handle;
+ tcmsg->tcm_parent = parent;
+
+ nl_msg_put_string(&request, TCA_KIND, "htb");
+ opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS);
+ nl_msg_put_unspec(&request, TCA_HTB_PARMS, &opt, sizeof opt);
+ tc_put_rtab(&request, TCA_HTB_RTAB, &opt.rate);
+ tc_put_rtab(&request, TCA_HTB_CTAB, &opt.ceil);
+ nl_msg_end_nested(&request, opt_offset);
+
+ error = tc_transact(&request, NULL);
+ if (error) {
+ VLOG_WARN_RL(&rl, "failed to replace %s class %u:%u, parent %u:%u, "
+ "min_rate=%u max_rate=%u burst=%u prio=%u (%s)",
+ netdev_get_name(netdev),
+ tc_get_major(handle), tc_get_minor(handle),
+ tc_get_major(parent), tc_get_minor(parent),
+ class->min_rate, class->max_rate,
+ class->burst, class->priority, ovs_strerror(error));
+ }
+ return error;
+}
+
+/* Parses Netlink attributes in 'options' for HTB parameters and stores a
+ * description of them into 'details'. The description complies with the
+ * specification given in the vswitch database documentation for linux-htb
+ * queue details. */
+static int
+htb_parse_tca_options__(struct nlattr *nl_options, struct htb_class *class)
+{
+ static const struct nl_policy tca_htb_policy[] = {
+ [TCA_HTB_PARMS] = { .type = NL_A_UNSPEC, .optional = false,
+ .min_len = sizeof(struct tc_htb_opt) },
+ };
+
+ struct nlattr *attrs[ARRAY_SIZE(tca_htb_policy)];
+ const struct tc_htb_opt *htb;
+
+ if (!nl_parse_nested(nl_options, tca_htb_policy,
+ attrs, ARRAY_SIZE(tca_htb_policy))) {
+ VLOG_WARN_RL(&rl, "failed to parse HTB class options");
+ return EPROTO;
+ }
+
+ htb = nl_attr_get(attrs[TCA_HTB_PARMS]);
+ class->min_rate = htb->rate.rate;
+ class->max_rate = htb->ceil.rate;
+ class->burst = tc_ticks_to_bytes(htb->rate.rate, htb->buffer);
+ class->priority = htb->prio;
+ return 0;
+}
+
+static int
+htb_parse_tcmsg__(struct ofpbuf *tcmsg, unsigned int *queue_id,
+ struct htb_class *options,
+ struct netdev_queue_stats *stats)
+{
+ struct nlattr *nl_options;
+ unsigned int handle;
+ int error;
+
+ error = tc_parse_class(tcmsg, &handle, &nl_options, stats);
+ if (!error && queue_id) {
+ unsigned int major = tc_get_major(handle);
+ unsigned int minor = tc_get_minor(handle);
+ if (major == 1 && minor > 0 && minor <= HTB_N_QUEUES) {
+ *queue_id = minor - 1;
+ } else {
+ error = EPROTO;
+ }
+ }
+ if (!error && options) {
+ error = htb_parse_tca_options__(nl_options, options);
+ }
+ return error;
+}
+
+static void
+htb_parse_qdisc_details__(struct netdev *netdev_,
+ const struct smap *details, struct htb_class *hc)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ const char *max_rate_s;
+
+ max_rate_s = smap_get(details, "max-rate");
+ hc->max_rate = max_rate_s ? strtoull(max_rate_s, NULL, 10) / 8 : 0;
+ if (!hc->max_rate) {
+ enum netdev_features current;
+
+ netdev_linux_read_features(netdev);
+ current = !netdev->get_features_error ? netdev->current : 0;
+ hc->max_rate = netdev_features_to_bps(current, 100 * 1000 * 1000) / 8;
+ }
+ hc->min_rate = hc->max_rate;
+ hc->burst = 0;
+ hc->priority = 0;
+}
+
+static int
+htb_parse_class_details__(struct netdev *netdev,
+ const struct smap *details, struct htb_class *hc)
+{
+ const struct htb *htb = htb_get__(netdev);
+ const char *min_rate_s = smap_get(details, "min-rate");
+ const char *max_rate_s = smap_get(details, "max-rate");
+ const char *burst_s = smap_get(details, "burst");
+ const char *priority_s = smap_get(details, "priority");
+ int mtu, error;
+
+ error = netdev_linux_get_mtu__(netdev_linux_cast(netdev), &mtu);
+ if (error) {
+ VLOG_WARN_RL(&rl, "cannot parse HTB class on device %s that lacks MTU",
+ netdev_get_name(netdev));
+ return error;
+ }
+
+ /* HTB requires at least an mtu sized min-rate to send any traffic even
+ * on uncongested links. */
+ hc->min_rate = min_rate_s ? strtoull(min_rate_s, NULL, 10) / 8 : 0;
+ hc->min_rate = MAX(hc->min_rate, mtu);
+ hc->min_rate = MIN(hc->min_rate, htb->max_rate);
+
+ /* max-rate */
+ hc->max_rate = (max_rate_s
+ ? strtoull(max_rate_s, NULL, 10) / 8
+ : htb->max_rate);
+ hc->max_rate = MAX(hc->max_rate, hc->min_rate);
+ hc->max_rate = MIN(hc->max_rate, htb->max_rate);
+
+ /* burst
+ *
+ * According to hints in the documentation that I've read, it is important
+ * that 'burst' be at least as big as the largest frame that might be
+ * transmitted. Also, making 'burst' a bit bigger than necessary is OK,
+ * but having it a bit too small is a problem. Since netdev_get_mtu()
+ * doesn't include the Ethernet header, we need to add at least 14 (18?) to
+ * the MTU. We actually add 64, instead of 14, as a guard against
+ * additional headers get tacked on somewhere that we're not aware of. */
+ hc->burst = burst_s ? strtoull(burst_s, NULL, 10) / 8 : 0;
+ hc->burst = MAX(hc->burst, mtu + 64);
+
+ /* priority */
+ hc->priority = priority_s ? strtoul(priority_s, NULL, 10) : 0;
+
+ return 0;
+}
+
+static int
+htb_query_class__(const struct netdev *netdev, unsigned int handle,
+ unsigned int parent, struct htb_class *options,
+ struct netdev_queue_stats *stats)
+{
+ struct ofpbuf *reply;
+ int error;
+
+ error = tc_query_class(netdev, handle, parent, &reply);
+ if (!error) {
+ error = htb_parse_tcmsg__(reply, NULL, options, stats);
+ ofpbuf_delete(reply);
+ }
+ return error;
+}
+
+static int
+htb_tc_install(struct netdev *netdev, const struct smap *details)
+{
+ int error;
+
+ error = htb_setup_qdisc__(netdev);
+ if (!error) {
+ struct htb_class hc;
+
+ htb_parse_qdisc_details__(netdev, details, &hc);
+ error = htb_setup_class__(netdev, tc_make_handle(1, 0xfffe),
+ tc_make_handle(1, 0), &hc);
+ if (!error) {
+ htb_install__(netdev, hc.max_rate);
+ }
+ }
+ return error;
+}
+
+static struct htb_class *
+htb_class_cast__(const struct tc_queue *queue)
+{
+ return CONTAINER_OF(queue, struct htb_class, tc_queue);
+}
+
+static void
+htb_update_queue__(struct netdev *netdev, unsigned int queue_id,
+ const struct htb_class *hc)
+{
+ struct htb *htb = htb_get__(netdev);
+ size_t hash = hash_int(queue_id, 0);
+ struct tc_queue *queue;
+ struct htb_class *hcp;
+
+ queue = tc_find_queue__(netdev, queue_id, hash);
+ if (queue) {
+ hcp = htb_class_cast__(queue);
+ } else {
+ hcp = xmalloc(sizeof *hcp);
+ queue = &hcp->tc_queue;
+ queue->queue_id = queue_id;
+ queue->created = time_msec();
+ hmap_insert(&htb->tc.queues, &queue->hmap_node, hash);
+ }
+
+ hcp->min_rate = hc->min_rate;
+ hcp->max_rate = hc->max_rate;
+ hcp->burst = hc->burst;
+ hcp->priority = hc->priority;
+}
+
+static int
+htb_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED)
+{
+ struct ofpbuf msg;
+ struct queue_dump_state state;
+ struct htb_class hc;
+
+ /* Get qdisc options. */
+ hc.max_rate = 0;
+ htb_query_class__(netdev, tc_make_handle(1, 0xfffe), 0, &hc, NULL);
+ htb_install__(netdev, hc.max_rate);
+
+ /* Get queues. */
+ if (!start_queue_dump(netdev, &state)) {
+ return ENODEV;
+ }
+ while (nl_dump_next(&state.dump, &msg, &state.buf)) {
+ unsigned int queue_id;
+
+ if (!htb_parse_tcmsg__(&msg, &queue_id, &hc, NULL)) {
+ htb_update_queue__(netdev, queue_id, &hc);
+ }
+ }
+ finish_queue_dump(&state);
+
+ return 0;
+}
+
+static void
+htb_tc_destroy(struct tc *tc)
+{
+ struct htb *htb = CONTAINER_OF(tc, struct htb, tc);
+ struct htb_class *hc, *next;
+
+ HMAP_FOR_EACH_SAFE (hc, next, tc_queue.hmap_node, &htb->tc.queues) {
+ hmap_remove(&htb->tc.queues, &hc->tc_queue.hmap_node);
+ free(hc);
+ }
+ tc_destroy(tc);
+ free(htb);
+}
+
+static int
+htb_qdisc_get(const struct netdev *netdev, struct smap *details)
+{
+ const struct htb *htb = htb_get__(netdev);
+ smap_add_format(details, "max-rate", "%llu", 8ULL * htb->max_rate);
+ return 0;
+}
+
+static int
+htb_qdisc_set(struct netdev *netdev, const struct smap *details)
+{
+ struct htb_class hc;
+ int error;
+
+ htb_parse_qdisc_details__(netdev, details, &hc);
+ error = htb_setup_class__(netdev, tc_make_handle(1, 0xfffe),
+ tc_make_handle(1, 0), &hc);
+ if (!error) {
+ htb_get__(netdev)->max_rate = hc.max_rate;
+ }
+ return error;
+}
+
+static int
+htb_class_get(const struct netdev *netdev OVS_UNUSED,
+ const struct tc_queue *queue, struct smap *details)
+{
+ const struct htb_class *hc = htb_class_cast__(queue);
+
+ smap_add_format(details, "min-rate", "%llu", 8ULL * hc->min_rate);
+ if (hc->min_rate != hc->max_rate) {
+ smap_add_format(details, "max-rate", "%llu", 8ULL * hc->max_rate);
+ }
+ smap_add_format(details, "burst", "%llu", 8ULL * hc->burst);
+ if (hc->priority) {
+ smap_add_format(details, "priority", "%u", hc->priority);
+ }
+ return 0;
+}
+
+static int
+htb_class_set(struct netdev *netdev, unsigned int queue_id,
+ const struct smap *details)
+{
+ struct htb_class hc;
+ int error;
+
+ error = htb_parse_class_details__(netdev, details, &hc);
+ if (error) {
+ return error;
+ }
+
+ error = htb_setup_class__(netdev, tc_make_handle(1, queue_id + 1),
+ tc_make_handle(1, 0xfffe), &hc);
+ if (error) {
+ return error;
+ }
+
+ htb_update_queue__(netdev, queue_id, &hc);
+ return 0;
+}
+
+static int
+htb_class_delete(struct netdev *netdev, struct tc_queue *queue)
+{
+ struct htb_class *hc = htb_class_cast__(queue);
+ struct htb *htb = htb_get__(netdev);
+ int error;
+
+ error = tc_delete_class(netdev, tc_make_handle(1, queue->queue_id + 1));
+ if (!error) {
+ hmap_remove(&htb->tc.queues, &hc->tc_queue.hmap_node);
+ free(hc);
+ }
+ return error;
+}
+
+static int
+htb_class_get_stats(const struct netdev *netdev, const struct tc_queue *queue,
+ struct netdev_queue_stats *stats)
+{
+ return htb_query_class__(netdev, tc_make_handle(1, queue->queue_id + 1),
+ tc_make_handle(1, 0xfffe), NULL, stats);
+}
+
+static int
+htb_class_dump_stats(const struct netdev *netdev OVS_UNUSED,
+ const struct ofpbuf *nlmsg,
+ netdev_dump_queue_stats_cb *cb, void *aux)
+{
+ struct netdev_queue_stats stats;
+ unsigned int handle, major, minor;
+ int error;
+
+ error = tc_parse_class(nlmsg, &handle, NULL, &stats);
+ if (error) {
+ return error;
+ }
+
+ major = tc_get_major(handle);
+ minor = tc_get_minor(handle);
+ if (major == 1 && minor > 0 && minor <= HTB_N_QUEUES) {
+ (*cb)(minor - 1, &stats, aux);
+ }
+ return 0;
+}
+
+static const struct tc_ops tc_ops_htb = {
+ "htb", /* linux_name */
+ "linux-htb", /* ovs_name */
+ HTB_N_QUEUES, /* n_queues */
+ htb_tc_install,
+ htb_tc_load,
+ htb_tc_destroy,
+ htb_qdisc_get,
+ htb_qdisc_set,
+ htb_class_get,
+ htb_class_set,
+ htb_class_delete,
+ htb_class_get_stats,
+ htb_class_dump_stats
+};
+\f
+/* "linux-hfsc" traffic control class. */
+
+#define HFSC_N_QUEUES 0xf000
+
+struct hfsc {
+ struct tc tc;
+ uint32_t max_rate;
+};
+
+struct hfsc_class {
+ struct tc_queue tc_queue;
+ uint32_t min_rate;
+ uint32_t max_rate;
+};
+
+static struct hfsc *
+hfsc_get__(const struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ return CONTAINER_OF(netdev->tc, struct hfsc, tc);
+}
+
+static struct hfsc_class *
+hfsc_class_cast__(const struct tc_queue *queue)
+{
+ return CONTAINER_OF(queue, struct hfsc_class, tc_queue);
+}
+
+static void
+hfsc_install__(struct netdev *netdev_, uint32_t max_rate)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct hfsc *hfsc;
+
+ hfsc = xmalloc(sizeof *hfsc);
+ tc_init(&hfsc->tc, &tc_ops_hfsc);
+ hfsc->max_rate = max_rate;
+ netdev->tc = &hfsc->tc;
+}
+
+static void
+hfsc_update_queue__(struct netdev *netdev, unsigned int queue_id,
+ const struct hfsc_class *hc)
+{
+ size_t hash;
+ struct hfsc *hfsc;
+ struct hfsc_class *hcp;
+ struct tc_queue *queue;
+
+ hfsc = hfsc_get__(netdev);
+ hash = hash_int(queue_id, 0);
+
+ queue = tc_find_queue__(netdev, queue_id, hash);
+ if (queue) {
+ hcp = hfsc_class_cast__(queue);
+ } else {
+ hcp = xmalloc(sizeof *hcp);
+ queue = &hcp->tc_queue;
+ queue->queue_id = queue_id;
+ queue->created = time_msec();
+ hmap_insert(&hfsc->tc.queues, &queue->hmap_node, hash);
+ }
+
+ hcp->min_rate = hc->min_rate;
+ hcp->max_rate = hc->max_rate;
+}
+
+static int
+hfsc_parse_tca_options__(struct nlattr *nl_options, struct hfsc_class *class)
+{
+ const struct tc_service_curve *rsc, *fsc, *usc;
+ static const struct nl_policy tca_hfsc_policy[] = {
+ [TCA_HFSC_RSC] = {
+ .type = NL_A_UNSPEC,
+ .optional = false,
+ .min_len = sizeof(struct tc_service_curve),
+ },
+ [TCA_HFSC_FSC] = {
+ .type = NL_A_UNSPEC,
+ .optional = false,
+ .min_len = sizeof(struct tc_service_curve),
+ },
+ [TCA_HFSC_USC] = {
+ .type = NL_A_UNSPEC,
+ .optional = false,
+ .min_len = sizeof(struct tc_service_curve),
+ },
+ };
+ struct nlattr *attrs[ARRAY_SIZE(tca_hfsc_policy)];
+
+ if (!nl_parse_nested(nl_options, tca_hfsc_policy,
+ attrs, ARRAY_SIZE(tca_hfsc_policy))) {
+ VLOG_WARN_RL(&rl, "failed to parse HFSC class options");
+ return EPROTO;
+ }
+
+ rsc = nl_attr_get(attrs[TCA_HFSC_RSC]);
+ fsc = nl_attr_get(attrs[TCA_HFSC_FSC]);
+ usc = nl_attr_get(attrs[TCA_HFSC_USC]);
+
+ if (rsc->m1 != 0 || rsc->d != 0 ||
+ fsc->m1 != 0 || fsc->d != 0 ||
+ usc->m1 != 0 || usc->d != 0) {
+ VLOG_WARN_RL(&rl, "failed to parse HFSC class options. "
+ "Non-linear service curves are not supported.");
+ return EPROTO;
+ }
+
+ if (rsc->m2 != fsc->m2) {
+ VLOG_WARN_RL(&rl, "failed to parse HFSC class options. "
+ "Real-time service curves are not supported ");
+ return EPROTO;
+ }
+
+ if (rsc->m2 > usc->m2) {
+ VLOG_WARN_RL(&rl, "failed to parse HFSC class options. "
+ "Min-rate service curve is greater than "
+ "the max-rate service curve.");
+ return EPROTO;
+ }
+
+ class->min_rate = fsc->m2;
+ class->max_rate = usc->m2;
+ return 0;
+}
+
+static int
+hfsc_parse_tcmsg__(struct ofpbuf *tcmsg, unsigned int *queue_id,
+ struct hfsc_class *options,
+ struct netdev_queue_stats *stats)
+{
+ int error;
+ unsigned int handle;
+ struct nlattr *nl_options;
+
+ error = tc_parse_class(tcmsg, &handle, &nl_options, stats);
+ if (error) {
+ return error;
+ }
+
+ if (queue_id) {
+ unsigned int major, minor;
+
+ major = tc_get_major(handle);
+ minor = tc_get_minor(handle);
+ if (major == 1 && minor > 0 && minor <= HFSC_N_QUEUES) {
+ *queue_id = minor - 1;
+ } else {
+ return EPROTO;
+ }
+ }
+
+ if (options) {
+ error = hfsc_parse_tca_options__(nl_options, options);
+ }
+
+ return error;
+}
+
+static int
+hfsc_query_class__(const struct netdev *netdev, unsigned int handle,
+ unsigned int parent, struct hfsc_class *options,
+ struct netdev_queue_stats *stats)
+{
+ int error;
+ struct ofpbuf *reply;
+
+ error = tc_query_class(netdev, handle, parent, &reply);
+ if (error) {
+ return error;
+ }
+
+ error = hfsc_parse_tcmsg__(reply, NULL, options, stats);
+ ofpbuf_delete(reply);
+ return error;
+}
+
+static void
+hfsc_parse_qdisc_details__(struct netdev *netdev_, const struct smap *details,
+ struct hfsc_class *class)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ uint32_t max_rate;
+ const char *max_rate_s;
+
+ max_rate_s = smap_get(details, "max-rate");
+ max_rate = max_rate_s ? strtoull(max_rate_s, NULL, 10) / 8 : 0;
+
+ if (!max_rate) {
+ enum netdev_features current;
+
+ netdev_linux_read_features(netdev);
+ current = !netdev->get_features_error ? netdev->current : 0;
+ max_rate = netdev_features_to_bps(current, 100 * 1000 * 1000) / 8;
+ }
+
+ class->min_rate = max_rate;
+ class->max_rate = max_rate;
+}
+
+static int
+hfsc_parse_class_details__(struct netdev *netdev,
+ const struct smap *details,
+ struct hfsc_class * class)
+{
+ const struct hfsc *hfsc;
+ uint32_t min_rate, max_rate;
+ const char *min_rate_s, *max_rate_s;
+
+ hfsc = hfsc_get__(netdev);
+ min_rate_s = smap_get(details, "min-rate");
+ max_rate_s = smap_get(details, "max-rate");
+
+ min_rate = min_rate_s ? strtoull(min_rate_s, NULL, 10) / 8 : 0;
+ min_rate = MAX(min_rate, 1);
+ min_rate = MIN(min_rate, hfsc->max_rate);
+
+ max_rate = (max_rate_s
+ ? strtoull(max_rate_s, NULL, 10) / 8
+ : hfsc->max_rate);
+ max_rate = MAX(max_rate, min_rate);
+ max_rate = MIN(max_rate, hfsc->max_rate);
+
+ class->min_rate = min_rate;
+ class->max_rate = max_rate;
+
+ return 0;
+}
+
+/* Create an HFSC qdisc.
+ *
+ * Equivalent to "tc qdisc add dev <dev> root handle 1: hfsc default 1". */
+static int
+hfsc_setup_qdisc__(struct netdev * netdev)
+{
+ struct tcmsg *tcmsg;
+ struct ofpbuf request;
+ struct tc_hfsc_qopt opt;
+
+ tc_del_qdisc(netdev);
+
+ tcmsg = tc_make_request(netdev, RTM_NEWQDISC,
+ NLM_F_EXCL | NLM_F_CREATE, &request);
+
+ if (!tcmsg) {
+ return ENODEV;
+ }
+
+ tcmsg->tcm_handle = tc_make_handle(1, 0);
+ tcmsg->tcm_parent = TC_H_ROOT;
+
+ memset(&opt, 0, sizeof opt);
+ opt.defcls = 1;
+
+ nl_msg_put_string(&request, TCA_KIND, "hfsc");
+ nl_msg_put_unspec(&request, TCA_OPTIONS, &opt, sizeof opt);
+
+ return tc_transact(&request, NULL);
+}
+
+/* Create an HFSC class.
+ *
+ * Equivalent to "tc class add <dev> parent <parent> classid <handle> hfsc
+ * sc rate <min_rate> ul rate <max_rate>" */
+static int
+hfsc_setup_class__(struct netdev *netdev, unsigned int handle,
+ unsigned int parent, struct hfsc_class *class)
+{
+ int error;
+ size_t opt_offset;
+ struct tcmsg *tcmsg;
+ struct ofpbuf request;
+ struct tc_service_curve min, max;
+
+ tcmsg = tc_make_request(netdev, RTM_NEWTCLASS, NLM_F_CREATE, &request);
+
+ if (!tcmsg) {
+ return ENODEV;
+ }
+
+ tcmsg->tcm_handle = handle;
+ tcmsg->tcm_parent = parent;
+
+ min.m1 = 0;
+ min.d = 0;
+ min.m2 = class->min_rate;
+
+ max.m1 = 0;
+ max.d = 0;
+ max.m2 = class->max_rate;
+
+ nl_msg_put_string(&request, TCA_KIND, "hfsc");
+ opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS);
+ nl_msg_put_unspec(&request, TCA_HFSC_RSC, &min, sizeof min);
+ nl_msg_put_unspec(&request, TCA_HFSC_FSC, &min, sizeof min);
+ nl_msg_put_unspec(&request, TCA_HFSC_USC, &max, sizeof max);
+ nl_msg_end_nested(&request, opt_offset);
+
+ error = tc_transact(&request, NULL);
+ if (error) {
+ VLOG_WARN_RL(&rl, "failed to replace %s class %u:%u, parent %u:%u, "
+ "min-rate %ubps, max-rate %ubps (%s)",
+ netdev_get_name(netdev),
+ tc_get_major(handle), tc_get_minor(handle),
+ tc_get_major(parent), tc_get_minor(parent),
+ class->min_rate, class->max_rate, ovs_strerror(error));
+ }
+
+ return error;
+}
+
+static int
+hfsc_tc_install(struct netdev *netdev, const struct smap *details)
+{
+ int error;
+ struct hfsc_class class;
+
+ error = hfsc_setup_qdisc__(netdev);
+
+ if (error) {
+ return error;
+ }
+
+ hfsc_parse_qdisc_details__(netdev, details, &class);
+ error = hfsc_setup_class__(netdev, tc_make_handle(1, 0xfffe),
+ tc_make_handle(1, 0), &class);
+
+ if (error) {
+ return error;
+ }
+
+ hfsc_install__(netdev, class.max_rate);
+ return 0;
+}
+
+static int
+hfsc_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED)
+{
+ struct ofpbuf msg;
+ struct queue_dump_state state;
+ struct hfsc_class hc;
+
+ hc.max_rate = 0;
+ hfsc_query_class__(netdev, tc_make_handle(1, 0xfffe), 0, &hc, NULL);
+ hfsc_install__(netdev, hc.max_rate);
+
+ if (!start_queue_dump(netdev, &state)) {
+ return ENODEV;
+ }
+
+ while (nl_dump_next(&state.dump, &msg, &state.buf)) {
+ unsigned int queue_id;
+
+ if (!hfsc_parse_tcmsg__(&msg, &queue_id, &hc, NULL)) {
+ hfsc_update_queue__(netdev, queue_id, &hc);
+ }
+ }
+
+ finish_queue_dump(&state);
+ return 0;
+}
+
+static void
+hfsc_tc_destroy(struct tc *tc)
+{
+ struct hfsc *hfsc;
+ struct hfsc_class *hc, *next;
+
+ hfsc = CONTAINER_OF(tc, struct hfsc, tc);
+
+ HMAP_FOR_EACH_SAFE (hc, next, tc_queue.hmap_node, &hfsc->tc.queues) {
+ hmap_remove(&hfsc->tc.queues, &hc->tc_queue.hmap_node);
+ free(hc);
+ }
+
+ tc_destroy(tc);
+ free(hfsc);
+}
+
+static int
+hfsc_qdisc_get(const struct netdev *netdev, struct smap *details)
+{
+ const struct hfsc *hfsc;
+ hfsc = hfsc_get__(netdev);
+ smap_add_format(details, "max-rate", "%llu", 8ULL * hfsc->max_rate);
+ return 0;
+}
+
+static int
+hfsc_qdisc_set(struct netdev *netdev, const struct smap *details)
+{
+ int error;
+ struct hfsc_class class;
+
+ hfsc_parse_qdisc_details__(netdev, details, &class);
+ error = hfsc_setup_class__(netdev, tc_make_handle(1, 0xfffe),
+ tc_make_handle(1, 0), &class);
+
+ if (!error) {
+ hfsc_get__(netdev)->max_rate = class.max_rate;
+ }
+
+ return error;
+}
+
+static int
+hfsc_class_get(const struct netdev *netdev OVS_UNUSED,
+ const struct tc_queue *queue, struct smap *details)
+{
+ const struct hfsc_class *hc;
+
+ hc = hfsc_class_cast__(queue);
+ smap_add_format(details, "min-rate", "%llu", 8ULL * hc->min_rate);
+ if (hc->min_rate != hc->max_rate) {
+ smap_add_format(details, "max-rate", "%llu", 8ULL * hc->max_rate);
+ }
+ return 0;
+}
+
+static int
+hfsc_class_set(struct netdev *netdev, unsigned int queue_id,
+ const struct smap *details)
+{
+ int error;
+ struct hfsc_class class;
+
+ error = hfsc_parse_class_details__(netdev, details, &class);
+ if (error) {
+ return error;
+ }
+
+ error = hfsc_setup_class__(netdev, tc_make_handle(1, queue_id + 1),
+ tc_make_handle(1, 0xfffe), &class);
+ if (error) {
+ return error;
+ }
+
+ hfsc_update_queue__(netdev, queue_id, &class);
+ return 0;
+}
+
+static int
+hfsc_class_delete(struct netdev *netdev, struct tc_queue *queue)
+{
+ int error;
+ struct hfsc *hfsc;
+ struct hfsc_class *hc;
+
+ hc = hfsc_class_cast__(queue);
+ hfsc = hfsc_get__(netdev);
+
+ error = tc_delete_class(netdev, tc_make_handle(1, queue->queue_id + 1));
+ if (!error) {
+ hmap_remove(&hfsc->tc.queues, &hc->tc_queue.hmap_node);
+ free(hc);
+ }
+ return error;
+}
+
+static int
+hfsc_class_get_stats(const struct netdev *netdev, const struct tc_queue *queue,
+ struct netdev_queue_stats *stats)
+{
+ return hfsc_query_class__(netdev, tc_make_handle(1, queue->queue_id + 1),
+ tc_make_handle(1, 0xfffe), NULL, stats);
+}
+
+static int
+hfsc_class_dump_stats(const struct netdev *netdev OVS_UNUSED,
+ const struct ofpbuf *nlmsg,
+ netdev_dump_queue_stats_cb *cb, void *aux)
+{
+ struct netdev_queue_stats stats;
+ unsigned int handle, major, minor;
+ int error;
+
+ error = tc_parse_class(nlmsg, &handle, NULL, &stats);
+ if (error) {
+ return error;
+ }
+
+ major = tc_get_major(handle);
+ minor = tc_get_minor(handle);
+ if (major == 1 && minor > 0 && minor <= HFSC_N_QUEUES) {
+ (*cb)(minor - 1, &stats, aux);
+ }
+ return 0;
+}
+
+static const struct tc_ops tc_ops_hfsc = {
+ "hfsc", /* linux_name */
+ "linux-hfsc", /* ovs_name */
+ HFSC_N_QUEUES, /* n_queues */
+ hfsc_tc_install, /* tc_install */
+ hfsc_tc_load, /* tc_load */
+ hfsc_tc_destroy, /* tc_destroy */
+ hfsc_qdisc_get, /* qdisc_get */
+ hfsc_qdisc_set, /* qdisc_set */
+ hfsc_class_get, /* class_get */
+ hfsc_class_set, /* class_set */
+ hfsc_class_delete, /* class_delete */
+ hfsc_class_get_stats, /* class_get_stats */
+ hfsc_class_dump_stats /* class_dump_stats */
+};
+\f
+/* "linux-default" traffic control class.
+ *
+ * This class represents the default, unnamed Linux qdisc. It corresponds to
+ * the "" (empty string) QoS type in the OVS database. */
+
+static void
+default_install__(struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ static const struct tc tc = TC_INITIALIZER(&tc, &tc_ops_default);
+
+ /* Nothing but a tc class implementation is allowed to write to a tc. This
+ * class never does that, so we can legitimately use a const tc object. */
+ netdev->tc = CONST_CAST(struct tc *, &tc);
+}
+
+static int
+default_tc_install(struct netdev *netdev,
+ const struct smap *details OVS_UNUSED)
+{
+ default_install__(netdev);
+ return 0;
+}
+
+static int
+default_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED)
+{
+ default_install__(netdev);
+ return 0;
+}
+
+static const struct tc_ops tc_ops_default = {
+ NULL, /* linux_name */
+ "", /* ovs_name */
+ 0, /* n_queues */
+ default_tc_install,
+ default_tc_load,
+ NULL, /* tc_destroy */
+ NULL, /* qdisc_get */
+ NULL, /* qdisc_set */
+ NULL, /* class_get */
+ NULL, /* class_set */
+ NULL, /* class_delete */
+ NULL, /* class_get_stats */
+ NULL /* class_dump_stats */
+};
+\f
+/* "linux-other" traffic control class.
+ *
+ * */
+
+static int
+other_tc_load(struct netdev *netdev_, struct ofpbuf *nlmsg OVS_UNUSED)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ static const struct tc tc = TC_INITIALIZER(&tc, &tc_ops_other);
+
+ /* Nothing but a tc class implementation is allowed to write to a tc. This
+ * class never does that, so we can legitimately use a const tc object. */
+ netdev->tc = CONST_CAST(struct tc *, &tc);
+ return 0;
+}
+
+static const struct tc_ops tc_ops_other = {
+ NULL, /* linux_name */
+ "linux-other", /* ovs_name */
+ 0, /* n_queues */
+ NULL, /* tc_install */
+ other_tc_load,
+ NULL, /* tc_destroy */
+ NULL, /* qdisc_get */
+ NULL, /* qdisc_set */
+ NULL, /* class_get */
+ NULL, /* class_set */
+ NULL, /* class_delete */
+ NULL, /* class_get_stats */
+ NULL /* class_dump_stats */
+};
+\f
+/* Traffic control. */
+
+/* Number of kernel "tc" ticks per second. */
+static double ticks_per_s;
+
+/* Number of kernel "jiffies" per second. This is used for the purpose of
+ * computing buffer sizes. Generally kernel qdiscs need to be able to buffer
+ * one jiffy's worth of data.
+ *
+ * There are two possibilities here:
+ *
+ * - 'buffer_hz' is the kernel's real timer tick rate, a small number in the
+ * approximate range of 100 to 1024. That means that we really need to
+ * make sure that the qdisc can buffer that much data.
+ *
+ * - 'buffer_hz' is an absurdly large number. That means that the kernel
+ * has finely granular timers and there's no need to fudge additional room
+ * for buffers. (There's no extra effort needed to implement that: the
+ * large 'buffer_hz' is used as a divisor, so practically any number will
+ * come out as 0 in the division. Small integer results in the case of
+ * really high dividends won't have any real effect anyhow.)
+ */
+static unsigned int buffer_hz;
+
+/* Returns tc handle 'major':'minor'. */
+static unsigned int
+tc_make_handle(unsigned int major, unsigned int minor)
+{
+ return TC_H_MAKE(major << 16, minor);
+}
+
+/* Returns the major number from 'handle'. */
+static unsigned int
+tc_get_major(unsigned int handle)
+{
+ return TC_H_MAJ(handle) >> 16;
+}
+
+/* Returns the minor number from 'handle'. */
+static unsigned int
+tc_get_minor(unsigned int handle)
+{
+ return TC_H_MIN(handle);
+}
+
+static struct tcmsg *
+tc_make_request(const struct netdev *netdev, int type, unsigned int flags,
+ struct ofpbuf *request)
+{
+ struct tcmsg *tcmsg;
+ int ifindex;
+ int error;
+
+ error = get_ifindex(netdev, &ifindex);
+ if (error) {
+ return NULL;
+ }
+
+ ofpbuf_init(request, 512);
+ nl_msg_put_nlmsghdr(request, sizeof *tcmsg, type, NLM_F_REQUEST | flags);
+ tcmsg = ofpbuf_put_zeros(request, sizeof *tcmsg);
+ tcmsg->tcm_family = AF_UNSPEC;
+ tcmsg->tcm_ifindex = ifindex;
+ /* Caller should fill in tcmsg->tcm_handle. */
+ /* Caller should fill in tcmsg->tcm_parent. */
+
+ return tcmsg;
+}
+
+static int
+tc_transact(struct ofpbuf *request, struct ofpbuf **replyp)
+{
+ int error = nl_transact(NETLINK_ROUTE, request, replyp);
+ ofpbuf_uninit(request);
+ return error;
+}
+
+/* Adds or deletes a root ingress qdisc on 'netdev'. We use this for
+ * policing configuration.
+ *
+ * This function is equivalent to running the following when 'add' is true:
+ * /sbin/tc qdisc add dev <devname> handle ffff: ingress
+ *
+ * This function is equivalent to running the following when 'add' is false:
+ * /sbin/tc qdisc del dev <devname> handle ffff: ingress
+ *
+ * The configuration and stats may be seen with the following command:
+ * /sbin/tc -s qdisc show dev <devname>
+ *
+ * Returns 0 if successful, otherwise a positive errno value.
+ */
+static int
+tc_add_del_ingress_qdisc(struct netdev *netdev, bool add)
+{
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+ int error;
+ int type = add ? RTM_NEWQDISC : RTM_DELQDISC;
+ int flags = add ? NLM_F_EXCL | NLM_F_CREATE : 0;
+
+ tcmsg = tc_make_request(netdev, type, flags, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = tc_make_handle(0xffff, 0);
+ tcmsg->tcm_parent = TC_H_INGRESS;
+ nl_msg_put_string(&request, TCA_KIND, "ingress");
+ nl_msg_put_unspec(&request, TCA_OPTIONS, NULL, 0);
+
+ error = tc_transact(&request, NULL);
+ if (error) {
+ /* If we're deleting the qdisc, don't worry about some of the
+ * error conditions. */
+ if (!add && (error == ENOENT || error == EINVAL)) {
+ return 0;
+ }
+ return error;
+ }
+
+ return 0;
}
+/* Adds a policer to 'netdev' with a rate of 'kbits_rate' and a burst size
+ * of 'kbits_burst'.
+ *
+ * This function is equivalent to running:
+ * /sbin/tc filter add dev <devname> parent ffff: protocol all prio 49
+ * basic police rate <kbits_rate>kbit burst <kbits_burst>k
+ * mtu 65535 drop
+ *
+ * The configuration and stats may be seen with the following command:
+ * /sbin/tc -s filter show <devname> eth0 parent ffff:
+ *
+ * Returns 0 if successful, otherwise a positive errno value.
+ */
static int
-netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off,
- enum netdev_flags on, enum netdev_flags *old_flagsp)
+tc_add_policer(struct netdev *netdev, int kbits_rate, int kbits_burst)
{
- int old_flags, new_flags;
+ struct tc_police tc_police;
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+ size_t basic_offset;
+ size_t police_offset;
int error;
-
- error = get_flags(netdev, &old_flags);
- if (!error) {
- *old_flagsp = iff_to_nd_flags(old_flags);
- new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
- if (new_flags != old_flags) {
- error = set_flags(netdev, new_flags);
- }
+ int mtu = 65535;
+
+ memset(&tc_police, 0, sizeof tc_police);
+ tc_police.action = TC_POLICE_SHOT;
+ tc_police.mtu = mtu;
+ tc_fill_rate(&tc_police.rate, (kbits_rate * 1000)/8, mtu);
+ tc_police.burst = tc_bytes_to_ticks(tc_police.rate.rate,
+ kbits_burst * 1024);
+
+ tcmsg = tc_make_request(netdev, RTM_NEWTFILTER,
+ NLM_F_EXCL | NLM_F_CREATE, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_parent = tc_make_handle(0xffff, 0);
+ tcmsg->tcm_info = tc_make_handle(49,
+ (OVS_FORCE uint16_t) htons(ETH_P_ALL));
+
+ nl_msg_put_string(&request, TCA_KIND, "basic");
+ basic_offset = nl_msg_start_nested(&request, TCA_OPTIONS);
+ police_offset = nl_msg_start_nested(&request, TCA_BASIC_POLICE);
+ nl_msg_put_unspec(&request, TCA_POLICE_TBF, &tc_police, sizeof tc_police);
+ tc_put_rtab(&request, TCA_POLICE_RATE, &tc_police.rate);
+ nl_msg_end_nested(&request, police_offset);
+ nl_msg_end_nested(&request, basic_offset);
+
+ error = tc_transact(&request, NULL);
+ if (error) {
+ return error;
}
- return error;
+
+ return 0;
}
static void
-poll_notify(struct list *list)
+read_psched(void)
{
- struct netdev_linux_notifier *notifier;
- LIST_FOR_EACH (notifier, struct netdev_linux_notifier, node, list) {
- struct netdev_notifier *n = ¬ifier->notifier;
- n->cb(n);
+ /* The values in psched are not individually very meaningful, but they are
+ * important. The tables below show some values seen in the wild.
+ *
+ * Some notes:
+ *
+ * - "c" has always been a constant 1000000 since at least Linux 2.4.14.
+ * (Before that, there are hints that it was 1000000000.)
+ *
+ * - "d" can be unrealistically large, see the comment on 'buffer_hz'
+ * above.
+ *
+ * /proc/net/psched
+ * -----------------------------------
+ * [1] 000c8000 000f4240 000f4240 00000064
+ * [2] 000003e8 00000400 000f4240 3b9aca00
+ * [3] 000003e8 00000400 000f4240 3b9aca00
+ * [4] 000003e8 00000400 000f4240 00000064
+ * [5] 000003e8 00000040 000f4240 3b9aca00
+ * [6] 000003e8 00000040 000f4240 000000f9
+ *
+ * a b c d ticks_per_s buffer_hz
+ * ------- --------- ---------- ------------- ----------- -------------
+ * [1] 819,200 1,000,000 1,000,000 100 819,200 100
+ * [2] 1,000 1,024 1,000,000 1,000,000,000 976,562 1,000,000,000
+ * [3] 1,000 1,024 1,000,000 1,000,000,000 976,562 1,000,000,000
+ * [4] 1,000 1,024 1,000,000 100 976,562 100
+ * [5] 1,000 64 1,000,000 1,000,000,000 15,625,000 1,000,000,000
+ * [6] 1,000 64 1,000,000 249 15,625,000 249
+ *
+ * [1] 2.6.18-128.1.6.el5.xs5.5.0.505.1024xen from XenServer 5.5.0-24648p
+ * [2] 2.6.26-1-686-bigmem from Debian lenny
+ * [3] 2.6.26-2-sparc64 from Debian lenny
+ * [4] 2.6.27.42-0.1.1.xs5.6.810.44.111163xen from XenServer 5.6.810-31078p
+ * [5] 2.6.32.21.22 (approx.) from Ubuntu 10.04 on VMware Fusion
+ * [6] 2.6.34 from kernel.org on KVM
+ */
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+ static const char fn[] = "/proc/net/psched";
+ unsigned int a, b, c, d;
+ FILE *stream;
+
+ if (!ovsthread_once_start(&once)) {
+ return;
}
-}
-static void
-netdev_linux_poll_cb(const struct rtnetlink_change *change,
- void *aux UNUSED)
-{
- if (change) {
- struct list *list = shash_find_data(&netdev_linux_notifiers,
- change->ifname);
- if (list) {
- poll_notify(list);
- }
+ ticks_per_s = 1.0;
+ buffer_hz = 100;
+
+ stream = fopen(fn, "r");
+ if (!stream) {
+ VLOG_WARN("%s: open failed: %s", fn, ovs_strerror(errno));
+ goto exit;
+ }
+
+ if (fscanf(stream, "%x %x %x %x", &a, &b, &c, &d) != 4) {
+ VLOG_WARN("%s: read failed", fn);
+ fclose(stream);
+ goto exit;
+ }
+ VLOG_DBG("%s: psched parameters are: %u %u %u %u", fn, a, b, c, d);
+ fclose(stream);
+
+ if (!a || !c) {
+ VLOG_WARN("%s: invalid scheduler parameters", fn);
+ goto exit;
+ }
+
+ ticks_per_s = (double) a * c / b;
+ if (c == 1000000) {
+ buffer_hz = d;
} else {
- struct shash_node *node;
- SHASH_FOR_EACH (node, &netdev_linux_notifiers) {
- poll_notify(node->data);
- }
+ VLOG_WARN("%s: unexpected psched parameters: %u %u %u %u",
+ fn, a, b, c, d);
}
+ VLOG_DBG("%s: ticks_per_s=%f buffer_hz=%u", fn, ticks_per_s, buffer_hz);
+
+exit:
+ ovsthread_once_done(&once);
+}
+
+/* Returns the number of bytes that can be transmitted in 'ticks' ticks at a
+ * rate of 'rate' bytes per second. */
+static unsigned int
+tc_ticks_to_bytes(unsigned int rate, unsigned int ticks)
+{
+ read_psched();
+ return (rate * ticks) / ticks_per_s;
+}
+
+/* Returns the number of ticks that it would take to transmit 'size' bytes at a
+ * rate of 'rate' bytes per second. */
+static unsigned int
+tc_bytes_to_ticks(unsigned int rate, unsigned int size)
+{
+ read_psched();
+ return rate ? ((unsigned long long int) ticks_per_s * size) / rate : 0;
+}
+
+/* Returns the number of bytes that need to be reserved for qdisc buffering at
+ * a transmission rate of 'rate' bytes per second. */
+static unsigned int
+tc_buffer_per_jiffy(unsigned int rate)
+{
+ read_psched();
+ return rate / buffer_hz;
}
+/* Given Netlink 'msg' that describes a qdisc, extracts the name of the qdisc,
+ * e.g. "htb", into '*kind' (if it is nonnull). If 'options' is nonnull,
+ * extracts 'msg''s TCA_OPTIONS attributes into '*options' if it is present or
+ * stores NULL into it if it is absent.
+ *
+ * '*kind' and '*options' point into 'msg', so they are owned by whoever owns
+ * 'msg'.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. */
static int
-netdev_linux_poll_add(struct netdev *netdev,
- void (*cb)(struct netdev_notifier *), void *aux,
- struct netdev_notifier **notifierp)
+tc_parse_qdisc(const struct ofpbuf *msg, const char **kind,
+ struct nlattr **options)
{
- const char *netdev_name = netdev_get_name(netdev);
- struct netdev_linux_notifier *notifier;
- struct list *list;
+ static const struct nl_policy tca_policy[] = {
+ [TCA_KIND] = { .type = NL_A_STRING, .optional = false },
+ [TCA_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
+ };
+ struct nlattr *ta[ARRAY_SIZE(tca_policy)];
- if (shash_is_empty(&netdev_linux_notifiers)) {
- int error = rtnetlink_notifier_register(&netdev_linux_poll_notifier,
- netdev_linux_poll_cb, NULL);
- if (error) {
- return error;
- }
+ if (!nl_policy_parse(msg, NLMSG_HDRLEN + sizeof(struct tcmsg),
+ tca_policy, ta, ARRAY_SIZE(ta))) {
+ VLOG_WARN_RL(&rl, "failed to parse qdisc message");
+ goto error;
}
- list = shash_find_data(&netdev_linux_notifiers, netdev_name);
- if (!list) {
- list = xmalloc(sizeof *list);
- list_init(list);
- shash_add(&netdev_linux_notifiers, netdev_name, list);
+ if (kind) {
+ *kind = nl_attr_get_string(ta[TCA_KIND]);
}
- notifier = xmalloc(sizeof *notifier);
- netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
- list_push_back(list, ¬ifier->node);
- *notifierp = ¬ifier->notifier;
- return 0;
-}
+ if (options) {
+ *options = ta[TCA_OPTIONS];
+ }
-static void
-netdev_linux_poll_remove(struct netdev_notifier *notifier_)
-{
- struct netdev_linux_notifier *notifier =
- CONTAINER_OF(notifier_, struct netdev_linux_notifier, notifier);
- struct list *list;
+ return 0;
- /* Remove 'notifier' from its list. */
- list = list_remove(¬ifier->node);
- if (list_is_empty(list)) {
- /* The list is now empty. Remove it from the hash and free it. */
- const char *netdev_name = netdev_get_name(notifier->notifier.netdev);
- shash_delete(&netdev_linux_notifiers,
- shash_find(&netdev_linux_notifiers, netdev_name));
- free(list);
+error:
+ if (kind) {
+ *kind = NULL;
}
- free(notifier);
-
- /* If that was the last notifier, unregister. */
- if (shash_is_empty(&netdev_linux_notifiers)) {
- rtnetlink_notifier_unregister(&netdev_linux_poll_notifier);
+ if (options) {
+ *options = NULL;
}
+ return EPROTO;
}
-const struct netdev_class netdev_linux_class = {
- "system",
+/* Given Netlink 'msg' that describes a class, extracts the queue ID (e.g. the
+ * minor number of its class ID) into '*queue_id', its TCA_OPTIONS attribute
+ * into '*options', and its queue statistics into '*stats'. Any of the output
+ * arguments may be null.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. */
+static int
+tc_parse_class(const struct ofpbuf *msg, unsigned int *handlep,
+ struct nlattr **options, struct netdev_queue_stats *stats)
+{
+ static const struct nl_policy tca_policy[] = {
+ [TCA_OPTIONS] = { .type = NL_A_NESTED, .optional = false },
+ [TCA_STATS2] = { .type = NL_A_NESTED, .optional = false },
+ };
+ struct nlattr *ta[ARRAY_SIZE(tca_policy)];
- netdev_linux_init,
- netdev_linux_run,
- netdev_linux_wait,
+ if (!nl_policy_parse(msg, NLMSG_HDRLEN + sizeof(struct tcmsg),
+ tca_policy, ta, ARRAY_SIZE(ta))) {
+ VLOG_WARN_RL(&rl, "failed to parse class message");
+ goto error;
+ }
- netdev_linux_create_system,
- netdev_linux_destroy,
- NULL, /* reconfigure */
+ if (handlep) {
+ struct tcmsg *tc = ofpbuf_at_assert(msg, NLMSG_HDRLEN, sizeof *tc);
+ *handlep = tc->tcm_handle;
+ }
- netdev_linux_open,
- netdev_linux_close,
+ if (options) {
+ *options = ta[TCA_OPTIONS];
+ }
- netdev_linux_enumerate,
+ if (stats) {
+ const struct gnet_stats_queue *gsq;
+ struct gnet_stats_basic gsb;
- netdev_linux_recv,
- netdev_linux_recv_wait,
- netdev_linux_drain,
+ static const struct nl_policy stats_policy[] = {
+ [TCA_STATS_BASIC] = { .type = NL_A_UNSPEC, .optional = false,
+ .min_len = sizeof gsb },
+ [TCA_STATS_QUEUE] = { .type = NL_A_UNSPEC, .optional = false,
+ .min_len = sizeof *gsq },
+ };
+ struct nlattr *sa[ARRAY_SIZE(stats_policy)];
- netdev_linux_send,
- netdev_linux_send_wait,
+ if (!nl_parse_nested(ta[TCA_STATS2], stats_policy,
+ sa, ARRAY_SIZE(sa))) {
+ VLOG_WARN_RL(&rl, "failed to parse class stats");
+ goto error;
+ }
- netdev_linux_set_etheraddr,
- netdev_linux_get_etheraddr,
- netdev_linux_get_mtu,
- netdev_linux_get_ifindex,
- netdev_linux_get_carrier,
- netdev_linux_get_stats,
+ /* Alignment issues screw up the length of struct gnet_stats_basic on
+ * some arch/bitsize combinations. Newer versions of Linux have a
+ * struct gnet_stats_basic_packed, but we can't depend on that. The
+ * easiest thing to do is just to make a copy. */
+ memset(&gsb, 0, sizeof gsb);
+ memcpy(&gsb, nl_attr_get(sa[TCA_STATS_BASIC]),
+ MIN(nl_attr_get_size(sa[TCA_STATS_BASIC]), sizeof gsb));
+ stats->tx_bytes = gsb.bytes;
+ stats->tx_packets = gsb.packets;
- netdev_linux_get_features,
- netdev_linux_set_advertisements,
- netdev_linux_get_vlan_vid,
- netdev_linux_set_policing,
+ gsq = nl_attr_get(sa[TCA_STATS_QUEUE]);
+ stats->tx_errors = gsq->drops;
+ }
- netdev_linux_get_in4,
- netdev_linux_set_in4,
- netdev_linux_get_in6,
- netdev_linux_add_router,
- netdev_linux_get_next_hop,
- netdev_linux_arp_lookup,
+ return 0;
- netdev_linux_update_flags,
+error:
+ if (options) {
+ *options = NULL;
+ }
+ if (stats) {
+ memset(stats, 0, sizeof *stats);
+ }
+ return EPROTO;
+}
- netdev_linux_poll_add,
- netdev_linux_poll_remove,
-};
+/* Queries the kernel for class with identifier 'handle' and parent 'parent'
+ * on 'netdev'. */
+static int
+tc_query_class(const struct netdev *netdev,
+ unsigned int handle, unsigned int parent,
+ struct ofpbuf **replyp)
+{
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+ int error;
-const struct netdev_class netdev_tap_class = {
- "tap",
+ tcmsg = tc_make_request(netdev, RTM_GETTCLASS, NLM_F_ECHO, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = handle;
+ tcmsg->tcm_parent = parent;
- netdev_linux_init,
- netdev_linux_run,
- netdev_linux_wait,
+ error = tc_transact(&request, replyp);
+ if (error) {
+ VLOG_WARN_RL(&rl, "query %s class %u:%u (parent %u:%u) failed (%s)",
+ netdev_get_name(netdev),
+ tc_get_major(handle), tc_get_minor(handle),
+ tc_get_major(parent), tc_get_minor(parent),
+ ovs_strerror(error));
+ }
+ return error;
+}
- netdev_linux_create_tap,
- netdev_linux_destroy,
- NULL, /* reconfigure */
+/* Equivalent to "tc class del dev <name> handle <handle>". */
+static int
+tc_delete_class(const struct netdev *netdev, unsigned int handle)
+{
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+ int error;
- netdev_linux_open,
- netdev_linux_close,
+ tcmsg = tc_make_request(netdev, RTM_DELTCLASS, 0, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = handle;
+ tcmsg->tcm_parent = 0;
- NULL, /* enumerate */
+ error = tc_transact(&request, NULL);
+ if (error) {
+ VLOG_WARN_RL(&rl, "delete %s class %u:%u failed (%s)",
+ netdev_get_name(netdev),
+ tc_get_major(handle), tc_get_minor(handle),
+ ovs_strerror(error));
+ }
+ return error;
+}
- netdev_linux_recv,
- netdev_linux_recv_wait,
- netdev_linux_drain,
+/* Equivalent to "tc qdisc del dev <name> root". */
+static int
+tc_del_qdisc(struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct ofpbuf request;
+ struct tcmsg *tcmsg;
+ int error;
- netdev_linux_send,
- netdev_linux_send_wait,
+ tcmsg = tc_make_request(netdev_, RTM_DELQDISC, 0, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = tc_make_handle(1, 0);
+ tcmsg->tcm_parent = TC_H_ROOT;
- netdev_linux_set_etheraddr,
- netdev_linux_get_etheraddr,
- netdev_linux_get_mtu,
- netdev_linux_get_ifindex,
- netdev_linux_get_carrier,
- netdev_linux_get_stats,
+ error = tc_transact(&request, NULL);
+ if (error == EINVAL) {
+ /* EINVAL probably means that the default qdisc was in use, in which
+ * case we've accomplished our purpose. */
+ error = 0;
+ }
+ if (!error && netdev->tc) {
+ if (netdev->tc->ops->tc_destroy) {
+ netdev->tc->ops->tc_destroy(netdev->tc);
+ }
+ netdev->tc = NULL;
+ }
+ return error;
+}
- netdev_linux_get_features,
- netdev_linux_set_advertisements,
- netdev_linux_get_vlan_vid,
- netdev_linux_set_policing,
+/* If 'netdev''s qdisc type and parameters are not yet known, queries the
+ * kernel to determine what they are. Returns 0 if successful, otherwise a
+ * positive errno value. */
+static int
+tc_query_qdisc(const struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct ofpbuf request, *qdisc;
+ const struct tc_ops *ops;
+ struct tcmsg *tcmsg;
+ int load_error;
+ int error;
- netdev_linux_get_in4,
- netdev_linux_set_in4,
- netdev_linux_get_in6,
- netdev_linux_add_router,
- netdev_linux_get_next_hop,
- netdev_linux_arp_lookup,
+ if (netdev->tc) {
+ return 0;
+ }
- netdev_linux_update_flags,
+ /* This RTM_GETQDISC is crafted to avoid OOPSing kernels that do not have
+ * commit 53b0f08 "net_sched: Fix qdisc_notify()", which is anything before
+ * 2.6.35 without that fix backported to it.
+ *
+ * To avoid the OOPS, we must not make a request that would attempt to dump
+ * a "built-in" qdisc, that is, the default pfifo_fast qdisc or one of a
+ * few others. There are a few ways that I can see to do this, but most of
+ * them seem to be racy (and if you lose the race the kernel OOPSes). The
+ * technique chosen here is to assume that any non-default qdisc that we
+ * create will have a class with handle 1:0. The built-in qdiscs only have
+ * a class with handle 0:0.
+ *
+ * We could check for Linux 2.6.35+ and use a more straightforward method
+ * there. */
+ tcmsg = tc_make_request(netdev_, RTM_GETQDISC, NLM_F_ECHO, &request);
+ if (!tcmsg) {
+ return ENODEV;
+ }
+ tcmsg->tcm_handle = tc_make_handle(1, 0);
+ tcmsg->tcm_parent = 0;
- netdev_linux_poll_add,
- netdev_linux_poll_remove,
-};
+ /* Figure out what tc class to instantiate. */
+ error = tc_transact(&request, &qdisc);
+ if (!error) {
+ const char *kind;
-const struct netdev_class netdev_gre_class = {
- "gre",
+ error = tc_parse_qdisc(qdisc, &kind, NULL);
+ if (error) {
+ ops = &tc_ops_other;
+ } else {
+ ops = tc_lookup_linux_name(kind);
+ if (!ops) {
+ static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 1);
+ VLOG_INFO_RL(&rl2, "unknown qdisc \"%s\"", kind);
- netdev_linux_init,
- netdev_linux_run,
- netdev_linux_wait,
+ ops = &tc_ops_other;
+ }
+ }
+ } else if (error == ENOENT) {
+ /* Either it's a built-in qdisc, or it's a qdisc set up by some
+ * other entity that doesn't have a handle 1:0. We will assume
+ * that it's the system default qdisc. */
+ ops = &tc_ops_default;
+ error = 0;
+ } else {
+ /* Who knows? Maybe the device got deleted. */
+ VLOG_WARN_RL(&rl, "query %s qdisc failed (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
+ ops = &tc_ops_other;
+ }
- netdev_linux_create_gre,
- netdev_linux_destroy,
- netdev_linux_reconfigure_gre,
+ /* Instantiate it. */
+ load_error = ops->tc_load(CONST_CAST(struct netdev *, netdev_), qdisc);
+ ovs_assert((load_error == 0) == (netdev->tc != NULL));
+ ofpbuf_delete(qdisc);
- netdev_linux_open,
- netdev_linux_close,
+ return error ? error : load_error;
+}
- NULL, /* enumerate */
+/* Linux traffic control uses tables with 256 entries ("rtab" tables) to
+ approximate the time to transmit packets of various lengths. For an MTU of
+ 256 or less, each entry is exact; for an MTU of 257 through 512, each entry
+ represents two possible packet lengths; for a MTU of 513 through 1024, four
+ possible lengths; and so on.
- netdev_linux_recv,
- netdev_linux_recv_wait,
- netdev_linux_drain,
+ Returns, for the specified 'mtu', the number of bits that packet lengths
+ need to be shifted right to fit within such a 256-entry table. */
+static int
+tc_calc_cell_log(unsigned int mtu)
+{
+ int cell_log;
- netdev_linux_send,
- netdev_linux_send_wait,
+ if (!mtu) {
+ mtu = ETH_PAYLOAD_MAX;
+ }
+ mtu += ETH_HEADER_LEN + VLAN_HEADER_LEN;
- netdev_linux_set_etheraddr,
- netdev_linux_get_etheraddr,
- netdev_linux_get_mtu,
- netdev_linux_get_ifindex,
- netdev_linux_get_carrier,
- netdev_linux_get_stats,
+ for (cell_log = 0; mtu >= 256; cell_log++) {
+ mtu >>= 1;
+ }
- netdev_linux_get_features,
- netdev_linux_set_advertisements,
- netdev_linux_get_vlan_vid,
- netdev_linux_set_policing,
+ return cell_log;
+}
- netdev_linux_get_in4,
- netdev_linux_set_in4,
- netdev_linux_get_in6,
- netdev_linux_add_router,
- netdev_linux_get_next_hop,
- netdev_linux_arp_lookup,
+/* Initializes 'rate' properly for a rate of 'Bps' bytes per second with an MTU
+ * of 'mtu'. */
+static void
+tc_fill_rate(struct tc_ratespec *rate, uint64_t Bps, int mtu)
+{
+ memset(rate, 0, sizeof *rate);
+ rate->cell_log = tc_calc_cell_log(mtu);
+ /* rate->overhead = 0; */ /* New in 2.6.24, not yet in some */
+ /* rate->cell_align = 0; */ /* distro headers. */
+ rate->mpu = ETH_TOTAL_MIN;
+ rate->rate = Bps;
+}
- netdev_linux_update_flags,
+/* Appends to 'msg' an "rtab" table for the specified 'rate' as a Netlink
+ * attribute of the specified "type".
+ *
+ * See tc_calc_cell_log() above for a description of "rtab"s. */
+static void
+tc_put_rtab(struct ofpbuf *msg, uint16_t type, const struct tc_ratespec *rate)
+{
+ uint32_t *rtab;
+ unsigned int i;
+
+ rtab = nl_msg_put_unspec_uninit(msg, type, TC_RTAB_SIZE);
+ for (i = 0; i < TC_RTAB_SIZE / sizeof *rtab; i++) {
+ unsigned packet_size = (i + 1) << rate->cell_log;
+ if (packet_size < rate->mpu) {
+ packet_size = rate->mpu;
+ }
+ rtab[i] = tc_bytes_to_ticks(rate->rate, packet_size);
+ }
+}
- netdev_linux_poll_add,
- netdev_linux_poll_remove,
-};
-\f
+/* Calculates the proper value of 'buffer' or 'cbuffer' in HTB options given a
+ * rate of 'Bps' bytes per second, the specified 'mtu', and a user-requested
+ * burst size of 'burst_bytes'. (If no value was requested, a 'burst_bytes' of
+ * 0 is fine.) */
static int
-get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
+tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes)
{
- /* Policy for RTNLGRP_LINK messages.
- *
- * There are *many* more fields in these messages, but currently we only
- * care about these fields. */
- 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) },
- };
-
+ unsigned int min_burst = tc_buffer_per_jiffy(Bps) + mtu;
+ return tc_bytes_to_ticks(Bps, MAX(burst_bytes, min_burst));
+}
+\f
+/* Linux-only functions declared in netdev-linux.h */
- static struct nl_sock *rtnl_sock;
- struct ofpbuf request;
- struct ofpbuf *reply;
- struct ifinfomsg *ifi;
- const struct rtnl_link_stats *rtnl_stats;
- struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
+/* Modifies the 'flag' bit in ethtool's flags field for 'netdev'. If
+ * 'enable' is true, the bit is set. Otherwise, it is cleared. */
+int
+netdev_linux_ethtool_set_flag(struct netdev *netdev, uint32_t flag,
+ const char *flag_name, bool enable)
+{
+ const char *netdev_name = netdev_get_name(netdev);
+ struct ethtool_value evalue;
+ uint32_t new_flags;
int error;
- if (!rtnl_sock) {
- error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &rtnl_sock);
- if (error) {
- VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s",
- strerror(error));
- return error;
- }
+ COVERAGE_INC(netdev_get_ethtool);
+ memset(&evalue, 0, sizeof evalue);
+ error = netdev_linux_do_ethtool(netdev_name,
+ (struct ethtool_cmd *)&evalue,
+ ETHTOOL_GFLAGS, "ETHTOOL_GFLAGS");
+ if (error) {
+ return error;
}
- 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);
+ COVERAGE_INC(netdev_set_ethtool);
+ evalue.data = new_flags = (evalue.data & ~flag) | (enable ? flag : 0);
+ error = netdev_linux_do_ethtool(netdev_name,
+ (struct ethtool_cmd *)&evalue,
+ ETHTOOL_SFLAGS, "ETHTOOL_SFLAGS");
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;
+ COVERAGE_INC(netdev_get_ethtool);
+ memset(&evalue, 0, sizeof evalue);
+ error = netdev_linux_do_ethtool(netdev_name,
+ (struct ethtool_cmd *)&evalue,
+ ETHTOOL_GFLAGS, "ETHTOOL_GFLAGS");
+ if (error) {
+ return error;
}
- if (!attrs[IFLA_STATS]) {
- VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats");
- ofpbuf_delete(reply);
- return EPROTO;
+ if (new_flags != evalue.data) {
+ VLOG_WARN_RL(&rl, "attempt to %s ethtool %s flag on network "
+ "device %s failed", enable ? "enable" : "disable",
+ flag_name, netdev_name);
+ return EOPNOTSUPP;
}
- 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;
}
+\f
+/* Utility functions. */
+
+/* Copies 'src' into 'dst', performing format conversion in the process. */
+static void
+netdev_stats_from_rtnl_link_stats(struct netdev_stats *dst,
+ const struct rtnl_link_stats *src)
+{
+ dst->rx_packets = src->rx_packets;
+ dst->tx_packets = src->tx_packets;
+ dst->rx_bytes = src->rx_bytes;
+ dst->tx_bytes = src->tx_bytes;
+ dst->rx_errors = src->rx_errors;
+ dst->tx_errors = src->tx_errors;
+ dst->rx_dropped = src->rx_dropped;
+ dst->tx_dropped = src->tx_dropped;
+ dst->multicast = src->multicast;
+ dst->collisions = src->collisions;
+ dst->rx_length_errors = src->rx_length_errors;
+ dst->rx_over_errors = src->rx_over_errors;
+ dst->rx_crc_errors = src->rx_crc_errors;
+ dst->rx_frame_errors = src->rx_frame_errors;
+ dst->rx_fifo_errors = src->rx_fifo_errors;
+ dst->rx_missed_errors = src->rx_missed_errors;
+ dst->tx_aborted_errors = src->tx_aborted_errors;
+ dst->tx_carrier_errors = src->tx_carrier_errors;
+ dst->tx_fifo_errors = src->tx_fifo_errors;
+ dst->tx_heartbeat_errors = src->tx_heartbeat_errors;
+ dst->tx_window_errors = src->tx_window_errors;
+}
static int
-get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats)
+get_stats_via_netlink(const struct netdev *netdev_, struct netdev_stats *stats)
{
- static const char fn[] = "/proc/net/dev";
- char line[1024];
- FILE *stream;
- int ln;
+ struct ofpbuf request;
+ struct ofpbuf *reply;
+ int error;
- stream = fopen(fn, "r");
- if (!stream) {
- VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
- return errno;
+ ofpbuf_init(&request, 0);
+ nl_msg_put_nlmsghdr(&request,
+ sizeof(struct ifinfomsg) + NL_ATTR_SIZE(IFNAMSIZ),
+ RTM_GETLINK, NLM_F_REQUEST);
+ ofpbuf_put_zeros(&request, sizeof(struct ifinfomsg));
+ nl_msg_put_string(&request, IFLA_IFNAME, netdev_get_name(netdev_));
+ error = nl_transact(NETLINK_ROUTE, &request, &reply);
+ ofpbuf_uninit(&request);
+ if (error) {
+ return error;
}
- 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;
- }
+ if (ofpbuf_try_pull(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg))) {
+ const struct nlattr *a = nl_attr_find(reply, 0, IFLA_STATS);
+ if (a && nl_attr_get_size(a) >= sizeof(struct rtnl_link_stats)) {
+ netdev_stats_from_rtnl_link_stats(stats, nl_attr_get(a));
+ error = 0;
+ } else {
+ VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats");
+ error = EPROTO;
}
+ } else {
+ VLOG_WARN_RL(&rl, "short RTM_GETLINK reply");
+ error = EPROTO;
}
- VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name);
- fclose(stream);
- return ENODEV;
+
+
+ ofpbuf_delete(reply);
+ return error;
}
-\f
+
static int
-get_flags(const struct netdev *netdev, int *flags)
+get_flags(const struct netdev *dev, unsigned int *flags)
{
struct ifreq ifr;
int error;
- error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCGIFFLAGS,
- "SIOCGIFFLAGS");
- *flags = ifr.ifr_flags;
+ *flags = 0;
+ error = af_inet_ifreq_ioctl(dev->name, &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS");
+ if (!error) {
+ *flags = ifr.ifr_flags;
+ }
return error;
}
static int
-set_flags(struct netdev *netdev, int flags)
+set_flags(const char *name, unsigned int flags)
{
struct ifreq ifr;
ifr.ifr_flags = flags;
- return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCSIFFLAGS,
- "SIOCSIFFLAGS");
+ return af_inet_ifreq_ioctl(name, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS");
}
static int
do_get_ifindex(const char *netdev_name)
{
struct ifreq ifr;
+ int error;
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
+ ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
COVERAGE_INC(netdev_get_ifindex);
- if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
+
+ error = af_inet_ioctl(SIOCGIFINDEX, &ifr);
+ if (error) {
VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
- netdev_name, strerror(errno));
- return -errno;
+ netdev_name, ovs_strerror(error));
+ return -error;
}
return ifr.ifr_ifindex;
}
static int
get_ifindex(const struct netdev *netdev_, int *ifindexp)
{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev_));
- *ifindexp = 0;
- if (!(netdev_dev->cache_valid & VALID_IFINDEX)) {
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+
+ if (!(netdev->cache_valid & VALID_IFINDEX)) {
int ifindex = do_get_ifindex(netdev_get_name(netdev_));
+
if (ifindex < 0) {
- return -ifindex;
+ netdev->get_ifindex_error = -ifindex;
+ netdev->ifindex = 0;
+ } else {
+ netdev->get_ifindex_error = 0;
+ netdev->ifindex = ifindex;
}
- netdev_dev->cache_valid |= VALID_IFINDEX;
- netdev_dev->ifindex = ifindex;
+ netdev->cache_valid |= VALID_IFINDEX;
}
- *ifindexp = netdev_dev->ifindex;
- return 0;
+
+ *ifindexp = netdev->ifindex;
+ return netdev->get_ifindex_error;
}
static int
{
struct ifreq ifr;
int hwaddr_family;
+ int error;
memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
+ ovs_strzcpy(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;
+ error = af_inet_ioctl(SIOCGIFHWADDR, &ifr);
+ if (error) {
+ /* ENODEV probably means that a vif disappeared asynchronously and
+ * hasn't been removed from the database yet, so reduce the log level
+ * to INFO for that case. */
+ VLOG(error == ENODEV ? VLL_INFO : VLL_ERR,
+ "ioctl(SIOCGIFHWADDR) on %s device failed: %s",
+ netdev_name, ovs_strerror(error));
+ return error;
}
hwaddr_family = ifr.ifr_hwaddr.sa_family;
if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) {
}
static int
-set_etheraddr(const char *netdev_name, int hwaddr_family,
+set_etheraddr(const char *netdev_name,
const uint8_t mac[ETH_ADDR_LEN])
{
struct ifreq ifr;
+ int error;
memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
- ifr.ifr_hwaddr.sa_family = hwaddr_family;
+ ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
+ ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
COVERAGE_INC(netdev_set_hwaddr);
- if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) {
+ error = af_inet_ioctl(SIOCSIFHWADDR, &ifr);
+ if (error) {
VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s",
- netdev_name, strerror(errno));
- return errno;
+ netdev_name, ovs_strerror(error));
}
- return 0;
+ return error;
}
static int
int cmd, const char *cmd_name)
{
struct ifreq ifr;
+ int error;
memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+ ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
ifr.ifr_data = (caddr_t) ecmd;
ecmd->cmd = cmd;
- COVERAGE_INC(netdev_ethtool);
- if (ioctl(af_inet_sock, SIOCETHTOOL, &ifr) == 0) {
- return 0;
- } else {
- if (errno != EOPNOTSUPP) {
+ error = af_inet_ioctl(SIOCETHTOOL, &ifr);
+ if (error) {
+ if (error != EOPNOTSUPP) {
VLOG_WARN_RL(&rl, "ethtool command %s on network device %s "
- "failed: %s", cmd_name, name, strerror(errno));
+ "failed: %s", cmd_name, name, ovs_strerror(error));
} else {
/* The device doesn't support this operation. That's pretty
* common, so there's no point in logging anything. */
}
- return errno;
- }
-}
-
-static int
-netdev_linux_do_ioctl(const char *name, struct ifreq *ifr, int cmd,
- const char *cmd_name)
-{
- strncpy(ifr->ifr_name, name, sizeof ifr->ifr_name);
- if (ioctl(af_inet_sock, cmd, ifr) == -1) {
- VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", name, cmd_name,
- strerror(errno));
- return errno;
}
- return 0;
+ return error;
}
static int
int error;
ifr.ifr_addr.sa_family = AF_INET;
- error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, cmd, cmd_name);
+ error = af_inet_ifreq_ioctl(netdev_get_name(netdev), &ifr, cmd, cmd_name);
if (!error) {
- const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
+ const struct sockaddr_in *sin = ALIGNED_CAST(struct sockaddr_in *,
+ &ifr.ifr_addr);
*ip = sin->sin_addr;
}
return error;
}
+
+/* Returns an AF_PACKET raw socket or a negative errno value. */
+static int
+af_packet_sock(void)
+{
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+ static int sock;
+
+ if (ovsthread_once_start(&once)) {
+ sock = socket(AF_PACKET, SOCK_RAW, 0);
+ if (sock >= 0) {
+ int error = set_nonblocking(sock);
+ if (error) {
+ close(sock);
+ sock = -error;
+ }
+ } else {
+ sock = -errno;
+ VLOG_ERR("failed to create packet socket: %s",
+ ovs_strerror(errno));
+ }
+ ovsthread_once_done(&once);
+ }
+
+ return sock;
+}