/*
- * Copyright (c) 2009, 2010 Nicira Networks.
+ * Copyright (c) 2009, 2010, 2011 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*/
#include <config.h>
+
+#include "netdev-linux.h"
+
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include <inttypes.h>
+#include <linux/gen_stats.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_sched.h>
#include <linux/rtnetlink.h>
#include <linux/sockios.h>
#include <unistd.h>
#include "coverage.h"
+#include "dpif-linux.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.h"
+#include "netlink-notifier.h"
+#include "netlink-socket.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
-#include "openvswitch/internal_dev.h"
-#include "openvswitch/gre.h"
#include "packets.h"
#include "poll-loop.h"
-#include "rtnetlink.h"
+#include "rtnetlink-link.h"
#include "socket-util.h"
#include "shash.h"
-#include "svec.h"
-
-#define THIS_MODULE VLM_netdev_linux
+#include "sset.h"
+#include "timer.h"
#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(netdev_linux);
+
+COVERAGE_DEFINE(netdev_get_vlan_vid);
+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_ethtool);
\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;
+/* 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
+
+static struct nln_notifier netdev_linux_cache_notifier;
static int cache_notifier_refcount;
enum {
VALID_IN6 = 1 << 3,
VALID_MTU = 1 << 4,
VALID_CARRIER = 1 << 5,
- VALID_IS_PSEUDO = 1 << 6, /* Represents is_internal and is_tap. */
- VALID_POLICING = 1 << 7,
- VALID_HAVE_VPORT_STATS = 1 << 8
+ VALID_POLICING = 1 << 6,
+ VALID_HAVE_VPORT_STATS = 1 << 7
};
struct tap_state {
int fd;
bool opened;
};
+\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. */
+};
+
+/* 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. */
+};
+
+/* 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 shash *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 shash *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 shash *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 shash *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 shash *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 *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
+};
+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_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_dev_linux {
struct netdev_dev netdev_dev;
struct shash_node *shash_node;
unsigned int cache_valid;
+ unsigned int change_seq;
+
+ 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. */
struct in6_addr in6;
int mtu;
int carrier;
- bool is_internal; /* Is this an openvswitch internal device? */
- bool is_tap; /* Is this a tuntap device? */
uint32_t kbits_rate; /* Policing data. */
uint32_t kbits_burst;
bool have_vport_stats;
+ struct tc *tc;
union {
struct tap_state tap;
int fd;
};
-/* An AF_INET socket (used for ioctl operations). */
-static int af_inet_sock = -1;
-
-struct netdev_linux_notifier {
- struct netdev_notifier notifier;
- struct list node;
-};
+/* Sockets used for ioctl operations. */
+static int af_inet_sock = -1; /* AF_INET, SOCK_DGRAM. */
-static struct shash netdev_linux_notifiers =
- SHASH_INITIALIZER(&netdev_linux_notifiers);
-static struct rtnetlink_notifier netdev_linux_poll_notifier;
+/* A Netlink routing socket that is not subscribed to any multicast groups. */
+static struct nl_sock *rtnl_sock;
/* This is set pretty low because we probably won't learn anything from the
* additional log messages. */
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 get_rtnl_sock(struct nl_sock **);
+static int af_packet_sock(void);
+static void netdev_linux_miimon_run(void);
+static void netdev_linux_miimon_wait(void);
static bool
is_netdev_linux_class(const struct netdev_class *netdev_class)
return CONTAINER_OF(netdev, struct netdev_linux, netdev);
}
-
+\f
static int
netdev_linux_init(void)
{
static int status = -1;
if (status < 0) {
+ /* Create AF_INET socket. */
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));
}
+
+ /* Create rtnetlink socket. */
+ if (!status) {
+ status = nl_sock_create(NETLINK_ROUTE, &rtnl_sock);
+ if (status) {
+ VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s",
+ strerror(status));
+ }
+ }
}
return status;
}
static void
netdev_linux_run(void)
{
- rtnetlink_notifier_run();
+ rtnetlink_link_notifier_run();
+ netdev_linux_miimon_run();
}
static void
netdev_linux_wait(void)
{
- rtnetlink_notifier_wait();
+ rtnetlink_link_notifier_wait();
+ netdev_linux_miimon_wait();
+}
+
+static void
+netdev_dev_linux_changed(struct netdev_dev_linux *dev)
+{
+ dev->change_seq++;
+ if (!dev->change_seq) {
+ dev->change_seq++;
+ }
+ dev->cache_valid = 0;
}
static void
-netdev_linux_cache_cb(const struct rtnetlink_change *change,
+netdev_linux_cache_cb(const struct rtnetlink_link_change *change,
void *aux OVS_UNUSED)
{
struct netdev_dev_linux *dev;
if (is_netdev_linux_class(netdev_class)) {
dev = netdev_dev_linux_cast(base_dev);
- dev->cache_valid = 0;
+ netdev_dev_linux_changed(dev);
}
}
} else {
netdev_dev_get_devices(&netdev_linux_class, &device_shash);
SHASH_FOR_EACH (node, &device_shash) {
dev = node->data;
- dev->cache_valid = 0;
+ netdev_dev_linux_changed(dev);
}
shash_destroy(&device_shash);
}
}
-/* 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 OVS_UNUSED,
- const struct shash *args, struct netdev_dev **netdev_devp)
+netdev_linux_create(const struct netdev_class *class, const char *name,
+ struct netdev_dev **netdev_devp)
{
struct netdev_dev_linux *netdev_dev;
int error;
- if (!shash_is_empty(args)) {
- VLOG_WARN("%s: arguments for system devices should be empty", name);
- }
-
if (!cache_notifier_refcount) {
- error = rtnetlink_notifier_register(&netdev_linux_cache_notifier,
- netdev_linux_cache_cb, NULL);
+ error = rtnetlink_link_notifier_register(&netdev_linux_cache_notifier,
+ netdev_linux_cache_cb, NULL);
if (error) {
return error;
}
cache_notifier_refcount++;
netdev_dev = xzalloc(sizeof *netdev_dev);
- netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_linux_class);
+ netdev_dev->change_seq = 1;
+ netdev_dev_init(&netdev_dev->netdev_dev, name, 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 OVS_UNUSED,
- const struct shash *args, struct netdev_dev **netdev_devp)
+netdev_linux_create_tap(const struct netdev_class *class OVS_UNUSED,
+ const char *name, struct netdev_dev **netdev_devp)
{
struct netdev_dev_linux *netdev_dev;
struct tap_state *state;
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;
/* Create tap device. */
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
+ ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
if (ioctl(state->fd, TUNSETIFF, &ifr) == -1) {
VLOG_WARN("%s: creating tap device failed: %s", name,
strerror(errno));
netdev_linux_destroy(struct netdev_dev *netdev_dev_)
{
struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_);
- const char *type = netdev_dev_get_type(netdev_dev_);
+ const struct netdev_class *class = netdev_dev_get_class(netdev_dev_);
+
+ if (netdev_dev->tc && netdev_dev->tc->ops->tc_destroy) {
+ netdev_dev->tc->ops->tc_destroy(netdev_dev->tc);
+ }
- if (!strcmp(type, "system")) {
+ if (class == &netdev_linux_class || class == &netdev_internal_class) {
cache_notifier_refcount--;
if (!cache_notifier_refcount) {
- rtnetlink_notifier_unregister(&netdev_linux_cache_notifier);
+ rtnetlink_link_notifier_unregister(&netdev_linux_cache_notifier);
}
- } else if (!strcmp(type, "tap")) {
+ } else if (class == &netdev_tap_class) {
destroy_tap(netdev_dev);
+ } else {
+ NOT_REACHED();
}
free(netdev_dev);
}
static int
-netdev_linux_open(struct netdev_dev *netdev_dev_, int ethertype,
- struct netdev **netdevp)
+netdev_linux_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
{
struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_);
struct netdev_linux *netdev;
netdev->fd = -1;
netdev_init(&netdev->netdev, netdev_dev_);
- error = netdev_get_flags(&netdev->netdev, &flags);
- if (error == ENODEV) {
- goto error;
+ /* Verify that the device really exists, by attempting to read its flags.
+ * (The flags might be cached, in which case this won't actually do an
+ * ioctl.)
+ *
+ * Don't do this for "internal" netdevs, though, because those 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(). */
+ if (netdev_dev_get_class(netdev_dev_) != &netdev_internal_class) {
+ error = netdev_get_flags(&netdev->netdev, &flags);
+ if (error == ENODEV) {
+ goto error;
+ }
}
if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap") &&
* directions appearing to be reversed. */
netdev->fd = netdev_dev->state.tap.fd;
netdev_dev->state.tap.opened = true;
- } else if (ethertype != NETDEV_ETH_TYPE_NONE) {
- struct sockaddr_ll sll;
- int protocol;
- int ifindex;
-
- /* 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) {
- error = errno;
- goto error;
- }
-
- /* Set non-blocking mode. */
- error = set_nonblocking(netdev->fd);
- if (error) {
- goto error;
- }
-
- /* Get ethernet device index. */
- error = get_ifindex(&netdev->netdev, &ifindex);
- if (error) {
- goto error;
- }
-
- /* Bind to specific ethernet device. */
- memset(&sll, 0, sizeof sll);
- sll.sll_family = AF_PACKET;
- sll.sll_ifindex = ifindex;
- if (bind(netdev->fd,
- (struct sockaddr *) &sll, sizeof sll) < 0) {
- error = errno;
- VLOG_ERR("bind to %s failed: %s", netdev_dev_get_name(netdev_dev_),
- 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);
- if (error) {
- goto error;
- }
}
*netdevp = &netdev->netdev;
free(netdev);
}
-/* Initializes 'svec' with a list of the names of all known network devices. */
+/* Initializes 'sset' with a list of the names of all known network devices. */
static int
-netdev_linux_enumerate(struct svec *svec)
+netdev_linux_enumerate(struct sset *sset)
{
struct if_nameindex *names;
size_t i;
for (i = 0; names[i].if_name != NULL; i++) {
- svec_add(svec, names[i].if_name);
+ sset_add(sset, names[i].if_name);
}
if_freenameindex(names);
return 0;
}
}
+static int
+netdev_linux_listen(struct netdev *netdev_)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct sockaddr_ll sll;
+ int ifindex;
+ int error;
+ int fd;
+
+ if (netdev->fd >= 0) {
+ return 0;
+ }
+
+ /* Create file descriptor. */
+ fd = socket(PF_PACKET, SOCK_RAW, 0);
+ if (fd < 0) {
+ error = errno;
+ VLOG_ERR("failed to create raw socket (%s)", strerror(error));
+ goto error;
+ }
+
+ /* Set non-blocking mode. */
+ error = set_nonblocking(fd);
+ if (error) {
+ goto error;
+ }
+
+ /* Get ethernet device index. */
+ error = get_ifindex(&netdev->netdev, &ifindex);
+ if (error) {
+ goto error;
+ }
+
+ /* Bind to specific ethernet device. */
+ memset(&sll, 0, sizeof sll);
+ sll.sll_family = AF_PACKET;
+ sll.sll_ifindex = ifindex;
+ sll.sll_protocol = (OVS_FORCE unsigned short int) htons(ETH_P_ALL);
+ if (bind(fd, (struct sockaddr *) &sll, sizeof sll) < 0) {
+ error = errno;
+ VLOG_ERR("%s: failed to bind raw socket (%s)",
+ netdev_get_name(netdev_), strerror(error));
+ goto error;
+ }
+
+ netdev->fd = fd;
+ return 0;
+
+error:
+ if (fd >= 0) {
+ close(fd);
+ }
+ return error;
+}
+
static int
netdev_linux_recv(struct netdev *netdev_, void *data, size_t size)
{
struct netdev_linux *netdev = netdev_linux_cast(netdev_);
if (netdev->fd < 0) {
- /* Device was opened with NETDEV_ETH_TYPE_NONE. */
+ /* Device is not listening. */
return -EAGAIN;
}
netdev_linux_send(struct netdev *netdev_, const void *data, size_t size)
{
struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ for (;;) {
+ ssize_t retval;
- /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE.
- */
- if (netdev->fd < 0) {
- return EPIPE;
- }
+ if (netdev->fd < 0) {
+ /* Use our AF_PACKET socket to send to this device. */
+ struct sockaddr_ll sll;
+ struct msghdr msg;
+ struct iovec iov;
+ int ifindex;
+ int error;
+ int sock;
+
+ sock = af_packet_sock();
+ if (sock < 0) {
+ return sock;
+ }
+
+ error = get_ifindex(netdev_, &ifindex);
+ if (error) {
+ return error;
+ }
+
+ /* 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 = (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 netdev's own 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. */
+ retval = write(netdev->fd, data, size);
+ }
- for (;;) {
- ssize_t retval = write(netdev->fd, data, size);
if (retval < 0) {
/* The Linux AF_PACKET implementation never blocks waiting for room
* for packets, instead returning ENOBUFS. Translate this into
return 0;
}
+/* 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_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev_));
+ struct ifreq ifr;
+ int error;
+
+ ifr.ifr_mtu = mtu;
+ error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr,
+ SIOCSIFMTU, "SIOCSIFMTU");
+ if (error) {
+ return error;
+ }
+
+ netdev_dev->mtu = ifr.ifr_mtu;
+ netdev_dev->cache_valid |= VALID_MTU;
+ return 0;
+}
+
/* Returns the ifindex of 'netdev', if successful, as a positive number.
* On failure, returns a negative errno value. */
static int
char *fn = NULL;
int fd = -1;
+ if (netdev_dev->miimon_interval > 0) {
+ *carrier = netdev_dev->miimon;
+ return 0;
+ }
+
if (!(netdev_dev->cache_valid & VALID_CARRIER)) {
char line[8];
int retval;
return error;
}
+static int
+netdev_linux_do_miimon(const char *name, int cmd, const char *cmd_name,
+ struct mii_ioctl_data *data)
+{
+ struct ifreq ifr;
+ int error;
+
+ memset(&ifr, 0, sizeof ifr);
+ memcpy(&ifr.ifr_data, data, sizeof *data);
+ error = netdev_linux_do_ioctl(name, &ifr, cmd, cmd_name);
+ memcpy(data, &ifr.ifr_data, sizeof *data);
+
+ return error;
+}
+
+static int
+netdev_linux_get_miimon(const char *name, bool *miimon)
+{
+ struct mii_ioctl_data data;
+ int error;
+
+ *miimon = false;
+
+ 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);
+
+ 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_dev_linux *netdev_dev;
+
+ netdev_dev = netdev_dev_linux_cast(netdev_get_dev(netdev_));
+
+ interval = interval > 0 ? MAX(interval, 100) : 0;
+ if (netdev_dev->miimon_interval != interval) {
+ netdev_dev->miimon_interval = interval;
+ timer_set_expired(&netdev_dev->miimon_timer);
+ }
+
+ return 0;
+}
+
+static void
+netdev_linux_miimon_run(void)
+{
+ 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) {
+ struct netdev_dev_linux *dev = node->data;
+ bool miimon;
+
+ if (dev->miimon_interval <= 0 || !timer_expired(&dev->miimon_timer)) {
+ continue;
+ }
+
+ netdev_linux_get_miimon(dev->netdev_dev.name, &miimon);
+ if (miimon != dev->miimon) {
+ dev->miimon = miimon;
+ netdev_dev_linux_changed(dev);
+ }
+
+ timer_set_duration(&dev->miimon_timer, dev->miimon_interval);
+ }
+
+ shash_destroy(&device_shash);
+}
+
+static void
+netdev_linux_miimon_wait(void)
+{
+ 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) {
+ struct netdev_dev_linux *dev = node->data;
+
+ if (dev->miimon_interval > 0) {
+ timer_wait(&dev->miimon_timer);
+ }
+ }
+ shash_destroy(&device_shash);
+}
+
/* 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. */
}
}
-/* Brings the 'is_internal' and 'is_tap' members of 'netdev_dev' up-to-date. */
static void
-netdev_linux_update_is_pseudo(struct netdev_dev_linux *netdev_dev)
-{
- if (!(netdev_dev->cache_valid & VALID_IS_PSEUDO)) {
- const char *name = netdev_dev_get_name(&netdev_dev->netdev_dev);
- const char *type = netdev_dev_get_type(&netdev_dev->netdev_dev);
-
- netdev_dev->is_tap = !strcmp(type, "tap");
- netdev_dev->is_internal = false;
- if (!netdev_dev->is_tap) {
- struct ethtool_drvinfo drvinfo;
- int error;
-
- memset(&drvinfo, 0, sizeof drvinfo);
- error = netdev_linux_do_ethtool(name,
- (struct ethtool_cmd *)&drvinfo,
- ETHTOOL_GDRVINFO,
- "ETHTOOL_GDRVINFO");
-
- if (!error && !strcmp(drvinfo.driver, "openvswitch")) {
- netdev_dev->is_internal = true;
- }
- }
-
- netdev_dev->cache_valid |= VALID_IS_PSEUDO;
- }
+swap_uint64(uint64_t *a, uint64_t *b)
+{
+ uint64_t tmp = *a;
+ *a = *b;
+ *b = tmp;
}
static void
-swap_uint64(uint64_t *a, uint64_t *b)
+get_stats_via_vport(const struct netdev *netdev_,
+ struct netdev_stats *stats)
{
- *a ^= *b;
- *b ^= *a;
- *a ^= *b;
-}
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev_));
-/* Retrieves current device stats for 'netdev'. */
+ if (netdev_dev->have_vport_stats ||
+ !(netdev_dev->cache_valid & VALID_HAVE_VPORT_STATS)) {
+ int error;
+
+ error = netdev_vport_get_stats(netdev_, stats);
+ if (error) {
+ VLOG_WARN_RL(&rl, "%s: obtaining netdev stats via vport failed %d",
+ netdev_get_name(netdev_), error);
+ }
+ netdev_dev->have_vport_stats = !error;
+ netdev_dev->cache_valid |= VALID_HAVE_VPORT_STATS;
+ }
+}
+
+static int
+netdev_linux_sys_get_stats(const struct netdev *netdev_,
+ struct netdev_stats *stats)
+{
+ static int use_netlink_stats = -1;
+ int error;
+
+ if (use_netlink_stats < 0) {
+ use_netlink_stats = check_for_working_netlink_stats();
+ }
+
+ if (use_netlink_stats) {
+ int ifindex;
+
+ error = get_ifindex(netdev_, &ifindex);
+ if (!error) {
+ error = get_stats_via_netlink(ifindex, stats);
+ }
+ } else {
+ error = get_stats_via_proc(netdev_get_name(netdev_), stats);
+ }
+
+ if (error) {
+ VLOG_WARN_RL(&rl, "%s: linux-sys get stats failed %d",
+ netdev_get_name(netdev_), error);
+ }
+ return error;
+
+}
+
+/* Retrieves current device stats for 'netdev-linux'. */
static int
netdev_linux_get_stats(const struct netdev *netdev_,
struct netdev_stats *stats)
{
struct netdev_dev_linux *netdev_dev =
netdev_dev_linux_cast(netdev_get_dev(netdev_));
- static int use_netlink_stats = -1;
+ struct netdev_stats dev_stats;
int error;
- COVERAGE_INC(netdev_get_stats);
+ get_stats_via_vport(netdev_, stats);
- if (netdev_dev->have_vport_stats ||
- !(netdev_dev->cache_valid & VALID_HAVE_VPORT_STATS)) {
+ error = netdev_linux_sys_get_stats(netdev_, &dev_stats);
- error = netdev_vport_get_stats(netdev_, stats);
- netdev_dev->have_vport_stats = !error;
- netdev_dev->cache_valid |= VALID_HAVE_VPORT_STATS;
+ if (error) {
+ if (!netdev_dev->have_vport_stats) {
+ return error;
+ } else {
+ return 0;
+ }
}
if (!netdev_dev->have_vport_stats) {
- if (use_netlink_stats < 0) {
- use_netlink_stats = check_for_working_netlink_stats();
- }
- if (use_netlink_stats) {
- int ifindex;
+ /* stats not available from OVS then use ioctl stats. */
+ *stats = dev_stats;
+ } else {
+ 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;
+ }
+ return 0;
+}
- error = get_ifindex(netdev_, &ifindex);
- if (!error) {
- error = get_stats_via_netlink(ifindex, stats);
- }
+/* Retrieves current device stats for 'netdev-tap' netdev or
+ * netdev-internal. */
+static int
+netdev_pseudo_get_stats(const struct netdev *netdev_,
+ struct netdev_stats *stats)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev_));
+ struct netdev_stats dev_stats;
+ int error;
+
+ get_stats_via_vport(netdev_, stats);
+
+ error = netdev_linux_sys_get_stats(netdev_, &dev_stats);
+ if (error) {
+ if (!netdev_dev->have_vport_stats) {
+ return error;
} else {
- error = get_stats_via_proc(netdev_get_name(netdev_), stats);
+ return 0;
}
}
* 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. */
- netdev_linux_update_is_pseudo(netdev_dev);
- if (!error && !netdev_dev->have_vport_stats &&
- (netdev_dev->is_internal || netdev_dev->is_tap)) {
+ if (!netdev_dev->have_vport_stats) {
+ *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);
stats->tx_fifo_errors = 0;
stats->tx_heartbeat_errors = 0;
stats->tx_window_errors = 0;
- }
-
- return error;
-}
+ } else {
+ stats->rx_dropped += dev_stats.tx_dropped;
+ stats->tx_dropped += dev_stats.rx_dropped;
-static int
-netdev_linux_set_stats(struct netdev *netdev,
- const struct netdev_stats *stats)
-{
- struct netdev_dev_linux *netdev_dev =
- netdev_dev_linux_cast(netdev_get_dev(netdev));
- struct internal_dev_stats dp_dev_stats;
- struct ifreq ifr;
+ stats->rx_errors += dev_stats.tx_errors;
+ stats->tx_errors += dev_stats.rx_errors;
- /* We must reject this call if 'netdev' is not an Open vSwitch internal
- * port, because the ioctl that we are about to execute is in the "device
- * private ioctls" range, which means that executing it on a device that
- * is not the type we expect could do any random thing.
- *
- * (Amusingly, these ioctl numbers are commented "THESE IOCTLS ARE
- * _DEPRECATED_ AND WILL DISAPPEAR IN 2.5.X" in linux/sockios.h. I guess
- * DaveM is a little behind on that.) */
- netdev_linux_update_is_pseudo(netdev_dev);
- if (!netdev_dev->is_internal) {
- return EOPNOTSUPP;
+ stats->multicast += dev_stats.multicast;
+ stats->collisions += dev_stats.collisions;
}
-
- /* This actually only sets the *offset* that the dp_dev applies, but in our
- * usage for fake bond devices the dp_dev never has any traffic of it own
- * so it has the same effect. */
- dp_dev_stats.rx_packets = stats->rx_packets;
- dp_dev_stats.rx_bytes = stats->rx_bytes;
- dp_dev_stats.tx_packets = stats->tx_packets;
- dp_dev_stats.tx_bytes = stats->tx_bytes;
- ifr.ifr_data = (void *) &dp_dev_stats;
- return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr,
- INTERNAL_DEV_SET_STATS,
- "INTERNAL_DEV_SET_STATS");
+ return 0;
}
/* Stores the features supported by 'netdev' into each of '*current',
* 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,
+netdev_linux_get_features(const struct netdev *netdev,
uint32_t *current, uint32_t *advertised,
uint32_t *supported, uint32_t *peer)
{
const char *netdev_name = netdev_get_name(netdev);
struct ofpbuf request;
- struct ofpbuf *reply;
struct tcmsg *tcmsg;
- struct nl_sock *rtnl_sock;
- int ifindex;
int error;
- error = get_ifindex(netdev, &ifindex);
- if (error) {
- return error;
- }
-
- error = get_rtnl_sock(&rtnl_sock);
- if (error) {
- return error;
+ tcmsg = tc_make_request(netdev, RTM_DELQDISC, 0, &request);
+ if (!tcmsg) {
+ return ENODEV;
}
-
- ofpbuf_init(&request, 0);
- nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *tcmsg,
- RTM_DELQDISC, NLM_F_REQUEST);
- tcmsg = ofpbuf_put_zeros(&request, sizeof *tcmsg);
- tcmsg->tcm_family = AF_UNSPEC;
- tcmsg->tcm_ifindex = ifindex;
- tcmsg->tcm_handle = 0xffff0000;
+ 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 = nl_sock_transact(rtnl_sock, &request, &reply);
- ofpbuf_uninit(&request);
- ofpbuf_delete(reply);
+
+ error = tc_transact(&request, NULL);
if (error && error != ENOENT && error != EINVAL) {
VLOG_WARN_RL(&rl, "%s: removing policing failed: %s",
netdev_name, strerror(error));
return 0;
}
+static int
+netdev_linux_get_qos_types(const struct netdev *netdev OVS_UNUSED,
+ struct sset *types)
+{
+ const struct tc_ops **opsp;
+
+ 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);
+ }
+ }
+ return 0;
+}
+
+static const struct tc_ops *
+tc_lookup_ovs_name(const char *name)
+{
+ const struct tc_ops **opsp;
+
+ for (opsp = tcs; *opsp != NULL; opsp++) {
+ const struct tc_ops *ops = *opsp;
+ if (!strcmp(name, ops->ovs_name)) {
+ return ops;
+ }
+ }
+ return NULL;
+}
+
+static const struct tc_ops *
+tc_lookup_linux_name(const char *name)
+{
+ const struct tc_ops **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;
+}
+
+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));
+ struct tc_queue *queue;
+
+ HMAP_FOR_EACH_IN_BUCKET (queue, hmap_node, hash, &netdev_dev->tc->queues) {
+ if (queue->queue_id == queue_id) {
+ return queue;
+ }
+ }
+ return NULL;
+}
+
+static struct tc_queue *
+tc_find_queue(const struct netdev *netdev, unsigned int queue_id)
+{
+ return tc_find_queue__(netdev, queue_id, hash_int(queue_id, 0));
+}
+
+static int
+netdev_linux_get_qos_capabilities(const struct netdev *netdev OVS_UNUSED,
+ const char *type,
+ struct netdev_qos_capabilities *caps)
+{
+ const struct tc_ops *ops = tc_lookup_ovs_name(type);
+ if (!ops) {
+ return EOPNOTSUPP;
+ }
+ caps->n_queues = ops->n_queues;
+ return 0;
+}
+
+static int
+netdev_linux_get_qos(const struct netdev *netdev,
+ const char **typep, struct shash *details)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ }
+
+ *typep = netdev_dev->tc->ops->ovs_name;
+ return (netdev_dev->tc->ops->qdisc_get
+ ? netdev_dev->tc->ops->qdisc_get(netdev, details)
+ : 0);
+}
+
+static int
+netdev_linux_set_qos(struct netdev *netdev,
+ const char *type, const struct shash *details)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(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;
+ }
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ }
+
+ if (new_ops == netdev_dev->tc->ops) {
+ return new_ops->qdisc_set ? new_ops->qdisc_set(netdev, details) : 0;
+ } else {
+ /* Delete existing qdisc. */
+ error = tc_del_qdisc(netdev);
+ if (error) {
+ return error;
+ }
+ assert(netdev_dev->tc == NULL);
+
+ /* Install new qdisc. */
+ error = new_ops->tc_install(netdev, details);
+ assert((error == 0) == (netdev_dev->tc != NULL));
+
+ return error;
+ }
+}
+
+static int
+netdev_linux_get_queue(const struct netdev *netdev,
+ unsigned int queue_id, struct shash *details)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ } else {
+ struct tc_queue *queue = tc_find_queue(netdev, queue_id);
+ return (queue
+ ? netdev_dev->tc->ops->class_get(netdev, queue, details)
+ : ENOENT);
+ }
+}
+
+static int
+netdev_linux_set_queue(struct netdev *netdev,
+ unsigned int queue_id, const struct shash *details)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ } else if (queue_id >= netdev_dev->tc->ops->n_queues
+ || !netdev_dev->tc->ops->class_set) {
+ return EINVAL;
+ }
+
+ return netdev_dev->tc->ops->class_set(netdev, queue_id, details);
+}
+
+static int
+netdev_linux_delete_queue(struct netdev *netdev, unsigned int queue_id)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ } else if (!netdev_dev->tc->ops->class_delete) {
+ return EINVAL;
+ } else {
+ struct tc_queue *queue = tc_find_queue(netdev, queue_id);
+ return (queue
+ ? netdev_dev->tc->ops->class_delete(netdev, queue)
+ : ENOENT);
+ }
+}
+
+static int
+netdev_linux_get_queue_stats(const struct netdev *netdev,
+ unsigned int queue_id,
+ struct netdev_queue_stats *stats)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ } else if (!netdev_dev->tc->ops->class_get_stats) {
+ return EOPNOTSUPP;
+ } else {
+ const struct tc_queue *queue = tc_find_queue(netdev, queue_id);
+ return (queue
+ ? netdev_dev->tc->ops->class_get_stats(netdev, queue, stats)
+ : ENOENT);
+ }
+}
+
+static bool
+start_queue_dump(const struct netdev *netdev, struct nl_dump *dump)
+{
+ 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(dump, rtnl_sock, &request);
+ ofpbuf_uninit(&request);
+ return true;
+}
+
+static int
+netdev_linux_dump_queues(const struct netdev *netdev,
+ netdev_dump_queues_cb *cb, void *aux)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ struct tc_queue *queue;
+ struct shash details;
+ int last_error;
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ } else if (!netdev_dev->tc->ops->class_get) {
+ return EOPNOTSUPP;
+ }
+
+ last_error = 0;
+ shash_init(&details);
+ HMAP_FOR_EACH (queue, hmap_node, &netdev_dev->tc->queues) {
+ shash_clear(&details);
+
+ error = netdev_dev->tc->ops->class_get(netdev, queue, &details);
+ if (!error) {
+ (*cb)(queue->queue_id, &details, aux);
+ } else {
+ last_error = error;
+ }
+ }
+ shash_destroy(&details);
+
+ return last_error;
+}
+
+static int
+netdev_linux_dump_queue_stats(const struct netdev *netdev,
+ netdev_dump_queue_stats_cb *cb, void *aux)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ struct nl_dump dump;
+ struct ofpbuf msg;
+ int last_error;
+ int error;
+
+ error = tc_query_qdisc(netdev);
+ if (error) {
+ return error;
+ } else if (!netdev_dev->tc->ops->class_dump_stats) {
+ return EOPNOTSUPP;
+ }
+
+ last_error = 0;
+ if (!start_queue_dump(netdev, &dump)) {
+ return ENODEV;
+ }
+ while (nl_dump_next(&dump, &msg)) {
+ error = netdev_dev->tc->ops->class_dump_stats(netdev, &msg, cb, aux);
+ if (error) {
+ last_error = error;
+ }
+ }
+
+ error = nl_dump_done(&dump);
+ return error ? error : last_error;
+}
+
static int
netdev_linux_get_in4(const struct netdev *netdev_,
struct in_addr *address, struct in_addr *netmask)
if (file != NULL) {
const char *name = netdev_get_name(netdev_);
while (fgets(line, sizeof line, file)) {
- struct in6_addr in6;
+ struct in6_addr in6_tmp;
char ifname[16 + 1];
- if (parse_if_inet6_line(line, &in6, ifname)
+ if (parse_if_inet6_line(line, &in6_tmp, ifname)
&& !strcmp(name, ifname))
{
- netdev_dev->in6 = in6;
+ netdev_dev->in6 = in6_tmp;
break;
}
}
int ioctl_nr, const char *ioctl_name, struct in_addr addr)
{
struct ifreq ifr;
- strncpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name);
+ ovs_strzcpy(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,
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));
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;
iface, &dest, &gateway, &flags, &refcnt,
&use, &metric, &mask, &mtu, &window, &irtt) != 11) {
- VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s",
+ 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
- * successfully retrieved, it stores the corresponding MAC address in 'mac' and
- * returns 0. Otherwise, it returns a positive errno value; in particular,
+static int
+netdev_linux_get_status(const struct netdev *netdev, struct shash *sh)
+{
+ struct ethtool_drvinfo drvinfo;
+ int error;
+
+ memset(&drvinfo, 0, sizeof drvinfo);
+ error = netdev_linux_do_ethtool(netdev_get_name(netdev),
+ (struct ethtool_cmd *)&drvinfo,
+ ETHTOOL_GDRVINFO,
+ "ETHTOOL_GDRVINFO");
+ if (!error) {
+ shash_add(sh, "driver_name", xstrdup(drvinfo.driver));
+ shash_add(sh, "driver_version", xstrdup(drvinfo.version));
+ shash_add(sh, "firmware_version", xstrdup(drvinfo.fw_version));
+ }
+
+ return error;
+}
+
+/* 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;
if (!retval) {
VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s",
netdev_get_name(netdev), IP_ARGS(&ip), strerror(retval));
}
- return retval;
+ return retval;
+}
+
+static int
+nd_to_iff_flags(enum netdev_flags nd)
+{
+ int iff = 0;
+ if (nd & NETDEV_UP) {
+ iff |= IFF_UP;
+ }
+ if (nd & NETDEV_PROMISC) {
+ iff |= IFF_PROMISC;
+ }
+ return iff;
+}
+
+static int
+iff_to_nd_flags(int iff)
+{
+ enum netdev_flags nd = 0;
+ if (iff & IFF_UP) {
+ nd |= NETDEV_UP;
+ }
+ if (iff & IFF_PROMISC) {
+ nd |= NETDEV_PROMISC;
+ }
+ return nd;
+}
+
+static int
+netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off,
+ enum netdev_flags on, enum netdev_flags *old_flagsp)
+{
+ int old_flags, new_flags;
+ 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);
+ }
+ }
+ return error;
+}
+
+static unsigned int
+netdev_linux_change_seq(const struct netdev *netdev)
+{
+ return netdev_dev_linux_cast(netdev_get_dev(netdev))->change_seq;
+}
+
+#define NETDEV_LINUX_CLASS(NAME, CREATE, ENUMERATE, GET_STATS, SET_STATS) \
+{ \
+ NAME, \
+ \
+ netdev_linux_init, \
+ netdev_linux_run, \
+ netdev_linux_wait, \
+ \
+ CREATE, \
+ netdev_linux_destroy, \
+ NULL, /* get_config */ \
+ NULL, /* set_config */ \
+ \
+ netdev_linux_open, \
+ netdev_linux_close, \
+ \
+ ENUMERATE, \
+ \
+ netdev_linux_listen, \
+ netdev_linux_recv, \
+ netdev_linux_recv_wait, \
+ netdev_linux_drain, \
+ \
+ 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_set_miimon_interval, \
+ GET_STATS, \
+ SET_STATS, \
+ \
+ netdev_linux_get_features, \
+ netdev_linux_set_advertisements, \
+ netdev_linux_get_vlan_vid, \
+ \
+ 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_dump_queues, \
+ 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, \
+ netdev_linux_get_status, \
+ netdev_linux_arp_lookup, \
+ \
+ netdev_linux_update_flags, \
+ \
+ netdev_linux_change_seq \
+}
+
+const struct netdev_class netdev_linux_class =
+ NETDEV_LINUX_CLASS(
+ "system",
+ netdev_linux_create,
+ netdev_linux_enumerate,
+ netdev_linux_get_stats,
+ NULL); /* set_stats */
+
+const struct netdev_class netdev_tap_class =
+ NETDEV_LINUX_CLASS(
+ "tap",
+ netdev_linux_create_tap,
+ NULL, /* enumerate */
+ netdev_pseudo_get_stats,
+ NULL); /* set_stats */
+
+const struct netdev_class netdev_internal_class =
+ NETDEV_LINUX_CLASS(
+ "internal",
+ netdev_linux_create,
+ NULL, /* enumerate */
+ netdev_pseudo_get_stats,
+ netdev_vport_set_stats);
+\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_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ return CONTAINER_OF(netdev_dev->tc, struct htb, tc);
+}
+
+static void
+htb_install__(struct netdev *netdev, uint64_t max_rate)
+{
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ struct htb *htb;
+
+ htb = xmalloc(sizeof *htb);
+ tc_init(&htb->tc, &tc_ops_htb);
+ htb->max_rate = max_rate;
+
+ netdev_dev->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_get_mtu(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, 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 shash *details, struct htb_class *hc)
+{
+ const char *max_rate_s;
+
+ max_rate_s = shash_find_data(details, "max-rate");
+ hc->max_rate = max_rate_s ? strtoull(max_rate_s, NULL, 10) / 8 : 0;
+ if (!hc->max_rate) {
+ uint32_t current;
+
+ netdev_get_features(netdev, ¤t, NULL, NULL, NULL);
+ hc->max_rate = netdev_features_to_bps(current) / 8;
+ }
+ hc->min_rate = hc->max_rate;
+ hc->burst = 0;
+ hc->priority = 0;
+}
+
+static int
+htb_parse_class_details__(struct netdev *netdev,
+ const struct shash *details, struct htb_class *hc)
+{
+ const struct htb *htb = htb_get__(netdev);
+ const char *min_rate_s = shash_find_data(details, "min-rate");
+ const char *max_rate_s = shash_find_data(details, "max-rate");
+ const char *burst_s = shash_find_data(details, "burst");
+ const char *priority_s = shash_find_data(details, "priority");
+ int mtu, error;
+
+ error = netdev_get_mtu(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 shash *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;
+ 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 nl_dump dump;
+ 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, &dump)) {
+ return ENODEV;
+ }
+ while (nl_dump_next(&dump, &msg)) {
+ unsigned int queue_id;
+
+ if (!htb_parse_tcmsg__(&msg, &queue_id, &hc, NULL)) {
+ htb_update_queue__(netdev, queue_id, &hc);
+ }
+ }
+ nl_dump_done(&dump);
+
+ 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 shash *details)
+{
+ const struct htb *htb = htb_get__(netdev);
+ shash_add(details, "max-rate", xasprintf("%llu", 8ULL * htb->max_rate));
+ return 0;
+}
+
+static int
+htb_qdisc_set(struct netdev *netdev, const struct shash *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 shash *details)
+{
+ const struct htb_class *hc = htb_class_cast__(queue);
+
+ shash_add(details, "min-rate", xasprintf("%llu", 8ULL * hc->min_rate));
+ if (hc->min_rate != hc->max_rate) {
+ shash_add(details, "max-rate", xasprintf("%llu", 8ULL * hc->max_rate));
+ }
+ shash_add(details, "burst", xasprintf("%llu", 8ULL * hc->burst));
+ if (hc->priority) {
+ shash_add(details, "priority", xasprintf("%u", hc->priority));
+ }
+ return 0;
+}
+
+static int
+htb_class_set(struct netdev *netdev, unsigned int queue_id,
+ const struct shash *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_dev_linux *netdev_dev;
+ netdev_dev = netdev_dev_linux_cast(netdev_get_dev(netdev));
+ return CONTAINER_OF(netdev_dev->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_dev_linux * netdev_dev;
+ struct hfsc *hfsc;
+
+ netdev_dev = netdev_dev_linux_cast(netdev_get_dev(netdev));
+ hfsc = xmalloc(sizeof *hfsc);
+ tc_init(&hfsc->tc, &tc_ops_hfsc);
+ hfsc->max_rate = max_rate;
+ netdev_dev->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;
+ 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 shash *details,
+ struct hfsc_class *class)
+{
+ uint32_t max_rate;
+ const char *max_rate_s;
+
+ max_rate_s = shash_find_data(details, "max-rate");
+ max_rate = max_rate_s ? strtoull(max_rate_s, NULL, 10) / 8 : 0;
+
+ if (!max_rate) {
+ uint32_t current;
+
+ netdev_get_features(netdev, ¤t, NULL, NULL, NULL);
+ max_rate = netdev_features_to_bps(current) / 8;
+ }
+
+ class->min_rate = max_rate;
+ class->max_rate = max_rate;
+}
+
+static int
+hfsc_parse_class_details__(struct netdev *netdev,
+ const struct shash *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 = shash_find_data(details, "min-rate");
+ max_rate_s = shash_find_data(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, strerror(error));
+ }
+
+ return error;
+}
+
+static int
+hfsc_tc_install(struct netdev *netdev, const struct shash *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 nl_dump dump;
+ 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, &dump)) {
+ return ENODEV;
+ }
+
+ while (nl_dump_next(&dump, &msg)) {
+ unsigned int queue_id;
+
+ if (!hfsc_parse_tcmsg__(&msg, &queue_id, &hc, NULL)) {
+ hfsc_update_queue__(netdev, queue_id, &hc);
+ }
+ }
+
+ nl_dump_done(&dump);
+ 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 shash *details)
+{
+ const struct hfsc *hfsc;
+ hfsc = hfsc_get__(netdev);
+ shash_add(details, "max-rate", xasprintf("%llu", 8ULL * hfsc->max_rate));
+ return 0;
+}
+
+static int
+hfsc_qdisc_set(struct netdev *netdev, const struct shash *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 shash *details)
+{
+ const struct hfsc_class *hc;
+
+ hc = hfsc_class_cast__(queue);
+ shash_add(details, "min-rate", xasprintf("%llu", 8ULL * hc->min_rate));
+ if (hc->min_rate != hc->max_rate) {
+ shash_add(details, "max-rate", xasprintf("%llu", 8ULL * hc->max_rate));
+ }
+ return 0;
+}
+
+static int
+hfsc_class_set(struct netdev *netdev, unsigned int queue_id,
+ const struct shash *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_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ static struct tc *tc;
+
+ if (!tc) {
+ tc = xmalloc(sizeof *tc);
+ tc_init(tc, &tc_ops_default);
+ }
+ netdev_dev->tc = tc;
}
static int
-nd_to_iff_flags(enum netdev_flags nd)
+default_tc_install(struct netdev *netdev,
+ const struct shash *details OVS_UNUSED)
{
- int iff = 0;
- if (nd & NETDEV_UP) {
- iff |= IFF_UP;
- }
- if (nd & NETDEV_PROMISC) {
- iff |= IFF_PROMISC;
- }
- return iff;
+ default_install__(netdev);
+ return 0;
}
static int
-iff_to_nd_flags(int iff)
+default_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED)
{
- enum netdev_flags nd = 0;
- if (iff & IFF_UP) {
- nd |= NETDEV_UP;
- }
- if (iff & IFF_PROMISC) {
- nd |= NETDEV_PROMISC;
- }
- return nd;
+ 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
-netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off,
- enum netdev_flags on, enum netdev_flags *old_flagsp)
+other_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED)
{
- int old_flags, new_flags;
+ struct netdev_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(netdev));
+ static struct tc *tc;
+
+ if (!tc) {
+ tc = xmalloc(sizeof *tc);
+ tc_init(tc, &tc_ops_other);
+ }
+ netdev_dev->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_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);
- }
+ 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_sock_transact(rtnl_sock, request, replyp);
+ ofpbuf_uninit(request);
return error;
}
static void
-poll_notify(struct list *list)
+read_psched(void)
+{
+ /* 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 const char fn[] = "/proc/net/psched";
+ unsigned int a, b, c, d;
+ FILE *stream;
+
+ ticks_per_s = 1.0;
+ buffer_hz = 100;
+
+ stream = fopen(fn, "r");
+ if (!stream) {
+ VLOG_WARN("%s: open failed: %s", fn, strerror(errno));
+ return;
+ }
+
+ if (fscanf(stream, "%x %x %x %x", &a, &b, &c, &d) != 4) {
+ VLOG_WARN("%s: read failed", fn);
+ fclose(stream);
+ return;
+ }
+ 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);
+ return;
+ }
+
+ ticks_per_s = (double) a * c / b;
+ if (c == 1000000) {
+ buffer_hz = d;
+ } else {
+ 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);
+}
+
+/* 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)
{
- struct netdev_linux_notifier *notifier;
- LIST_FOR_EACH (notifier, struct netdev_linux_notifier, node, list) {
- struct netdev_notifier *n = ¬ifier->notifier;
- n->cb(n);
+ if (!buffer_hz) {
+ read_psched();
}
+ return (rate * ticks) / ticks_per_s;
}
-static void
-netdev_linux_poll_cb(const struct rtnetlink_change *change,
- void *aux OVS_UNUSED)
+/* 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)
{
- if (change) {
- struct list *list = shash_find_data(&netdev_linux_notifiers,
- change->ifname);
- if (list) {
- poll_notify(list);
- }
- } else {
- struct shash_node *node;
- SHASH_FOR_EACH (node, &netdev_linux_notifiers) {
- poll_notify(node->data);
- }
+ if (!buffer_hz) {
+ 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)
+{
+ if (!buffer_hz) {
+ 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;
+ }
+
+ if (kind) {
+ *kind = nl_attr_get_string(ta[TCA_KIND]);
}
- 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 (options) {
+ *options = ta[TCA_OPTIONS];
}
- notifier = xmalloc(sizeof *notifier);
- netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
- list_push_back(list, ¬ifier->node);
- *notifierp = ¬ifier->notifier;
return 0;
+
+error:
+ if (kind) {
+ *kind = NULL;
+ }
+ if (options) {
+ *options = NULL;
+ }
+ return EPROTO;
}
-static void
-netdev_linux_poll_remove(struct netdev_notifier *notifier_)
+/* 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)
{
- struct netdev_linux_notifier *notifier =
- CONTAINER_OF(notifier_, struct netdev_linux_notifier, notifier);
- struct list *list;
+ 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)];
- /* 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);
+ 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;
+ }
+
+ if (handlep) {
+ struct tcmsg *tc = ofpbuf_at_assert(msg, NLMSG_HDRLEN, sizeof *tc);
+ *handlep = tc->tcm_handle;
+ }
+
+ if (options) {
+ *options = ta[TCA_OPTIONS];
+ }
+
+ if (stats) {
+ const struct gnet_stats_queue *gsq;
+ struct gnet_stats_basic gsb;
+
+ 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)];
+
+ if (!nl_parse_nested(ta[TCA_STATS2], stats_policy,
+ sa, ARRAY_SIZE(sa))) {
+ VLOG_WARN_RL(&rl, "failed to parse class stats");
+ goto error;
+ }
+
+ /* 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;
+
+ gsq = nl_attr_get(sa[TCA_STATS_QUEUE]);
+ stats->tx_errors = gsq->drops;
}
- free(notifier);
- /* If that was the last notifier, unregister. */
- if (shash_is_empty(&netdev_linux_notifiers)) {
- rtnetlink_notifier_unregister(&netdev_linux_poll_notifier);
+ return 0;
+
+error:
+ if (options) {
+ *options = NULL;
+ }
+ if (stats) {
+ memset(stats, 0, sizeof *stats);
}
+ return EPROTO;
}
-const struct netdev_class netdev_linux_class = {
- "system",
+/* 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;
+
+ 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),
+ strerror(error));
+ }
+ return error;
+}
- netdev_linux_create_system,
- 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;
- netdev_linux_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),
+ 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_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(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,
- netdev_linux_set_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_dev->tc) {
+ if (netdev_dev->tc->ops->tc_destroy) {
+ netdev_dev->tc->ops->tc_destroy(netdev_dev->tc);
+ }
+ netdev_dev->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_dev_linux *netdev_dev =
+ netdev_dev_linux_cast(netdev_get_dev(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_dev->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_tap_class = {
- "tap",
+ 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), strerror(error));
+ ops = &tc_ops_other;
+ }
- netdev_linux_create_tap,
- netdev_linux_destroy,
- NULL, /* reconfigure */
+ /* Instantiate it. */
+ load_error = ops->tc_load((struct netdev *) netdev, qdisc);
+ assert((load_error == 0) == (netdev_dev->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,
- NULL, /* set_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,
-};
+/* 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
+tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes)
+{
+ unsigned int min_burst = tc_buffer_per_jiffy(Bps) + mtu;
+ return tc_bytes_to_ticks(Bps, MAX(burst_bytes, min_burst));
+}
+\f
+/* 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;
+}
\f
+/* Utility functions. */
+
static int
get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
{
.min_len = sizeof(struct rtnl_link_stats) },
};
- 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)];
int error;
- error = get_rtnl_sock(&rtnl_sock);
- if (error) {
- return error;
- }
-
ofpbuf_init(&request, 0);
- nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *ifi,
- RTM_GETLINK, NLM_F_REQUEST);
+ nl_msg_put_nlmsghdr(&request, sizeof *ifi, RTM_GETLINK, NLM_F_REQUEST);
ifi = ofpbuf_put_zeros(&request, sizeof *ifi);
ifi->ifi_family = PF_UNSPEC;
ifi->ifi_index = ifindex;
return EPROTO;
}
- 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;
+ netdev_stats_from_rtnl_link_stats(stats, nl_attr_get(attrs[IFLA_STATS]));
ofpbuf_delete(reply);
fclose(stream);
return ENODEV;
}
-\f
+
static int
get_flags(const struct netdev *netdev, int *flags)
{
{
struct ifreq 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_ifindex);
if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
int hwaddr_family;
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));
+ /* 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(errno == ENODEV ? VLL_INFO : VLL_ERR,
+ "ioctl(SIOCGIFHWADDR) on %s device failed: %s",
+ netdev_name, strerror(errno));
return errno;
}
hwaddr_family = ifr.ifr_hwaddr.sa_family;
struct ifreq ifr;
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);
ifr.ifr_hwaddr.sa_family = hwaddr_family;
memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
COVERAGE_INC(netdev_set_hwaddr);
struct ifreq ifr;
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;
}
}
+/* 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;
+
+ memset(&evalue, 0, sizeof evalue);
+ error = netdev_linux_do_ethtool(netdev_name,
+ (struct ethtool_cmd *)&evalue,
+ ETHTOOL_GFLAGS, "ETHTOOL_GFLAGS");
+ if (error) {
+ return error;
+ }
+
+ 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;
+ }
+
+ 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 (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;
+ }
+
+ return 0;
+}
+
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);
+ ovs_strzcpy(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 error;
}
-/* Obtains a Netlink routing socket that is not subscribed to any multicast
- * groups. Returns 0 if successful, otherwise a positive errno value. Stores
- * the socket in '*rtnl_sockp' if successful, otherwise a null pointer. */
+/* Returns an AF_PACKET raw socket or a negative errno value. */
static int
-get_rtnl_sock(struct nl_sock **rtnl_sockp)
+af_packet_sock(void)
{
- static struct nl_sock *sock;
- int error;
+ static int sock = INT_MIN;
- if (!sock) {
- error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &sock);
- if (error) {
- VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s",
- strerror(error));
+ if (sock == INT_MIN) {
+ sock = socket(AF_PACKET, SOCK_RAW, 0);
+ if (sock >= 0) {
+ set_nonblocking(sock);
+ } else {
+ sock = -errno;
+ VLOG_ERR("failed to create packet socket: %s", strerror(errno));
}
- } else {
- error = 0;
}
- *rtnl_sockp = sock;
- return error;
+ return sock;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff