There are two existing dpif implementations that may serve as
useful examples during a port:
- * lib/dpif-linux.c is a Linux-specific dpif implementation that
+ * lib/dpif-netlink.c is a Linux-specific dpif implementation that
talks to an Open vSwitch-specific kernel module (whose sources
are in the "datapath" directory). The kernel module performs
all of the switching work, passing packets that do not match any
if LINUX
lib_libopenvswitch_la_SOURCES += \
- lib/dpif-linux.c \
- lib/dpif-linux.h \
+ lib/dpif-netlink.c \
+ lib/dpif-netlink.h \
lib/netdev-linux.c \
lib/netdev-linux.h \
lib/netlink-notifier.c \
if WIN32
lib_libopenvswitch_la_SOURCES += \
+ lib/dpif-netlink.c \
+ lib/dpif-netlink.h \
lib/netlink-notifier.c \
lib/netlink-notifier.h \
lib/netlink-protocol.h \
+++ /dev/null
-/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <config.h>
-
-#include "dpif-linux.h"
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <net/if.h>
-#include <linux/types.h>
-#include <linux/pkt_sched.h>
-#include <poll.h>
-#include <stdlib.h>
-#include <strings.h>
-#include <sys/epoll.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include "bitmap.h"
-#include "dpif-provider.h"
-#include "dynamic-string.h"
-#include "flow.h"
-#include "fat-rwlock.h"
-#include "netdev.h"
-#include "netdev-linux.h"
-#include "netdev-vport.h"
-#include "netlink-notifier.h"
-#include "netlink-socket.h"
-#include "netlink.h"
-#include "odp-util.h"
-#include "ofpbuf.h"
-#include "packets.h"
-#include "poll-loop.h"
-#include "random.h"
-#include "shash.h"
-#include "sset.h"
-#include "timeval.h"
-#include "unaligned.h"
-#include "util.h"
-#include "vlog.h"
-
-VLOG_DEFINE_THIS_MODULE(dpif_linux);
-enum { MAX_PORTS = USHRT_MAX };
-
-/* This ethtool flag was introduced in Linux 2.6.24, so it might be
- * missing if we have old headers. */
-#define ETH_FLAG_LRO (1 << 15) /* LRO is enabled */
-
-struct dpif_linux_dp {
- /* Generic Netlink header. */
- uint8_t cmd;
-
- /* struct ovs_header. */
- int dp_ifindex;
-
- /* Attributes. */
- const char *name; /* OVS_DP_ATTR_NAME. */
- const uint32_t *upcall_pid; /* OVS_DP_ATTR_UPCALL_PID. */
- uint32_t user_features; /* OVS_DP_ATTR_USER_FEATURES */
- const struct ovs_dp_stats *stats; /* OVS_DP_ATTR_STATS. */
- const struct ovs_dp_megaflow_stats *megaflow_stats;
- /* OVS_DP_ATTR_MEGAFLOW_STATS.*/
-};
-
-static void dpif_linux_dp_init(struct dpif_linux_dp *);
-static int dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *,
- const struct ofpbuf *);
-static void dpif_linux_dp_dump_start(struct nl_dump *);
-static int dpif_linux_dp_transact(const struct dpif_linux_dp *request,
- struct dpif_linux_dp *reply,
- struct ofpbuf **bufp);
-static int dpif_linux_dp_get(const struct dpif *, struct dpif_linux_dp *reply,
- struct ofpbuf **bufp);
-
-struct dpif_linux_flow {
- /* Generic Netlink header. */
- uint8_t cmd;
-
- /* struct ovs_header. */
- unsigned int nlmsg_flags;
- int dp_ifindex;
-
- /* Attributes.
- *
- * The 'stats' member points to 64-bit data that might only be aligned on
- * 32-bit boundaries, so get_unaligned_u64() should be used to access its
- * values.
- *
- * If 'actions' is nonnull then OVS_FLOW_ATTR_ACTIONS will be included in
- * the Netlink version of the command, even if actions_len is zero. */
- const struct nlattr *key; /* OVS_FLOW_ATTR_KEY. */
- size_t key_len;
- const struct nlattr *mask; /* OVS_FLOW_ATTR_MASK. */
- size_t mask_len;
- const struct nlattr *actions; /* OVS_FLOW_ATTR_ACTIONS. */
- size_t actions_len;
- const struct ovs_flow_stats *stats; /* OVS_FLOW_ATTR_STATS. */
- const uint8_t *tcp_flags; /* OVS_FLOW_ATTR_TCP_FLAGS. */
- const ovs_32aligned_u64 *used; /* OVS_FLOW_ATTR_USED. */
- bool clear; /* OVS_FLOW_ATTR_CLEAR. */
-};
-
-static void dpif_linux_flow_init(struct dpif_linux_flow *);
-static int dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *,
- const struct ofpbuf *);
-static void dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *,
- struct ofpbuf *);
-static int dpif_linux_flow_transact(struct dpif_linux_flow *request,
- struct dpif_linux_flow *reply,
- struct ofpbuf **bufp);
-static void dpif_linux_flow_get_stats(const struct dpif_linux_flow *,
- struct dpif_flow_stats *);
-static void dpif_linux_flow_to_dpif_flow(struct dpif_flow *,
- const struct dpif_linux_flow *);
-
-/* One of the dpif channels between the kernel and userspace. */
-struct dpif_channel {
- struct nl_sock *sock; /* Netlink socket. */
- long long int last_poll; /* Last time this channel was polled. */
-};
-
-struct dpif_handler {
- struct dpif_channel *channels;/* Array of channels for each handler. */
- struct epoll_event *epoll_events;
- int epoll_fd; /* epoll fd that includes channel socks. */
- int n_events; /* Num events returned by epoll_wait(). */
- int event_offset; /* Offset into 'epoll_events'. */
-};
-
-/* Datapath interface for the openvswitch Linux kernel module. */
-struct dpif_linux {
- struct dpif dpif;
- int dp_ifindex;
-
- /* Upcall messages. */
- struct fat_rwlock upcall_lock;
- struct dpif_handler *handlers;
- uint32_t n_handlers; /* Num of upcall handlers. */
- int uc_array_size; /* Size of 'handler->channels' and */
- /* 'handler->epoll_events'. */
-
- /* Change notification. */
- struct nl_sock *port_notifier; /* vport multicast group subscriber. */
- bool refresh_channels;
-};
-
-static void report_loss(struct dpif_linux *, struct dpif_channel *,
- uint32_t ch_idx, uint32_t handler_id);
-
-static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5);
-
-/* Generic Netlink family numbers for OVS.
- *
- * Initialized by dpif_linux_init(). */
-static int ovs_datapath_family;
-static int ovs_vport_family;
-static int ovs_flow_family;
-static int ovs_packet_family;
-
-/* Generic Netlink multicast groups for OVS.
- *
- * Initialized by dpif_linux_init(). */
-static unsigned int ovs_vport_mcgroup;
-
-static int dpif_linux_init(void);
-static int open_dpif(const struct dpif_linux_dp *, struct dpif **);
-static uint32_t dpif_linux_port_get_pid(const struct dpif *,
- odp_port_t port_no, uint32_t hash);
-static int dpif_linux_refresh_channels(struct dpif_linux *,
- uint32_t n_handlers);
-static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *,
- struct ofpbuf *);
-static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *,
- const struct ofpbuf *);
-
-static struct dpif_linux *
-dpif_linux_cast(const struct dpif *dpif)
-{
- dpif_assert_class(dpif, &dpif_linux_class);
- return CONTAINER_OF(dpif, struct dpif_linux, dpif);
-}
-
-static int
-dpif_linux_enumerate(struct sset *all_dps,
- const struct dpif_class *dpif_class OVS_UNUSED)
-{
- struct nl_dump dump;
- uint64_t reply_stub[NL_DUMP_BUFSIZE / 8];
- struct ofpbuf msg, buf;
- int error;
-
- error = dpif_linux_init();
- if (error) {
- return error;
- }
-
- ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub);
- dpif_linux_dp_dump_start(&dump);
- while (nl_dump_next(&dump, &msg, &buf)) {
- struct dpif_linux_dp dp;
-
- if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) {
- sset_add(all_dps, dp.name);
- }
- }
- ofpbuf_uninit(&buf);
- return nl_dump_done(&dump);
-}
-
-static int
-dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name,
- bool create, struct dpif **dpifp)
-{
- struct dpif_linux_dp dp_request, dp;
- struct ofpbuf *buf;
- uint32_t upcall_pid;
- int error;
-
- error = dpif_linux_init();
- if (error) {
- return error;
- }
-
- /* Create or look up datapath. */
- dpif_linux_dp_init(&dp_request);
- if (create) {
- dp_request.cmd = OVS_DP_CMD_NEW;
- upcall_pid = 0;
- dp_request.upcall_pid = &upcall_pid;
- } else {
- /* Use OVS_DP_CMD_SET to report user features */
- dp_request.cmd = OVS_DP_CMD_SET;
- }
- dp_request.name = name;
- dp_request.user_features |= OVS_DP_F_UNALIGNED;
- dp_request.user_features |= OVS_DP_F_VPORT_PIDS;
- error = dpif_linux_dp_transact(&dp_request, &dp, &buf);
- if (error) {
- return error;
- }
-
- error = open_dpif(&dp, dpifp);
- ofpbuf_delete(buf);
- return error;
-}
-
-static int
-open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp)
-{
- struct dpif_linux *dpif;
-
- dpif = xzalloc(sizeof *dpif);
- dpif->port_notifier = NULL;
- fat_rwlock_init(&dpif->upcall_lock);
-
- dpif_init(&dpif->dpif, &dpif_linux_class, dp->name,
- dp->dp_ifindex, dp->dp_ifindex);
-
- dpif->dp_ifindex = dp->dp_ifindex;
- *dpifp = &dpif->dpif;
-
- return 0;
-}
-
-/* Destroys the netlink sockets pointed by the elements in 'socksp'
- * and frees the 'socksp'. */
-static void
-vport_del_socksp(struct nl_sock **socksp, uint32_t n_socks)
-{
- size_t i;
-
- for (i = 0; i < n_socks; i++) {
- nl_sock_destroy(socksp[i]);
- }
-
- free(socksp);
-}
-
-/* Creates an array of netlink sockets. Returns an array of the
- * corresponding pointers. Records the error in 'error'. */
-static struct nl_sock **
-vport_create_socksp(uint32_t n_socks, int *error)
-{
- struct nl_sock **socksp = xzalloc(n_socks * sizeof *socksp);
- size_t i;
-
- for (i = 0; i < n_socks; i++) {
- *error = nl_sock_create(NETLINK_GENERIC, &socksp[i]);
- if (*error) {
- goto error;
- }
- }
-
- return socksp;
-
-error:
- vport_del_socksp(socksp, n_socks);
-
- return NULL;
-}
-
-/* Given the array of pointers to netlink sockets 'socksp', returns
- * the array of corresponding pids. If the 'socksp' is NULL, returns
- * a single-element array of value 0. */
-static uint32_t *
-vport_socksp_to_pids(struct nl_sock **socksp, uint32_t n_socks)
-{
- uint32_t *pids;
-
- if (!socksp) {
- pids = xzalloc(sizeof *pids);
- } else {
- size_t i;
-
- pids = xzalloc(n_socks * sizeof *pids);
- for (i = 0; i < n_socks; i++) {
- pids[i] = nl_sock_pid(socksp[i]);
- }
- }
-
- return pids;
-}
-
-/* Given the port number 'port_idx', extracts the pids of netlink sockets
- * associated to the port and assigns it to 'upcall_pids'. */
-static bool
-vport_get_pids(struct dpif_linux *dpif, uint32_t port_idx,
- uint32_t **upcall_pids)
-{
- uint32_t *pids;
- size_t i;
-
- /* Since the nl_sock can only be assigned in either all
- * or none "dpif->handlers" channels, the following check
- * would suffice. */
- if (!dpif->handlers[0].channels[port_idx].sock) {
- return false;
- }
-
- pids = xzalloc(dpif->n_handlers * sizeof *pids);
-
- for (i = 0; i < dpif->n_handlers; i++) {
- pids[i] = nl_sock_pid(dpif->handlers[i].channels[port_idx].sock);
- }
-
- *upcall_pids = pids;
-
- return true;
-}
-
-static int
-vport_add_channels(struct dpif_linux *dpif, odp_port_t port_no,
- struct nl_sock **socksp)
-{
- struct epoll_event event;
- uint32_t port_idx = odp_to_u32(port_no);
- size_t i, j;
- int error;
-
- if (dpif->handlers == NULL) {
- return 0;
- }
-
- /* We assume that the datapath densely chooses port numbers, which can
- * therefore be used as an index into 'channels' and 'epoll_events' of
- * 'dpif->handler'. */
- if (port_idx >= dpif->uc_array_size) {
- uint32_t new_size = port_idx + 1;
-
- if (new_size > MAX_PORTS) {
- VLOG_WARN_RL(&error_rl, "%s: datapath port %"PRIu32" too big",
- dpif_name(&dpif->dpif), port_no);
- return EFBIG;
- }
-
- for (i = 0; i < dpif->n_handlers; i++) {
- struct dpif_handler *handler = &dpif->handlers[i];
-
- handler->channels = xrealloc(handler->channels,
- new_size * sizeof *handler->channels);
-
- for (j = dpif->uc_array_size; j < new_size; j++) {
- handler->channels[j].sock = NULL;
- }
-
- handler->epoll_events = xrealloc(handler->epoll_events,
- new_size * sizeof *handler->epoll_events);
-
- }
- dpif->uc_array_size = new_size;
- }
-
- memset(&event, 0, sizeof event);
- event.events = EPOLLIN;
- event.data.u32 = port_idx;
-
- for (i = 0; i < dpif->n_handlers; i++) {
- struct dpif_handler *handler = &dpif->handlers[i];
-
- if (epoll_ctl(handler->epoll_fd, EPOLL_CTL_ADD, nl_sock_fd(socksp[i]),
- &event) < 0) {
- error = errno;
- goto error;
- }
- dpif->handlers[i].channels[port_idx].sock = socksp[i];
- dpif->handlers[i].channels[port_idx].last_poll = LLONG_MIN;
- }
-
- return 0;
-
-error:
- for (j = 0; j < i; j++) {
- epoll_ctl(dpif->handlers[j].epoll_fd, EPOLL_CTL_DEL,
- nl_sock_fd(socksp[j]), NULL);
- dpif->handlers[j].channels[port_idx].sock = NULL;
- }
-
- return error;
-}
-
-static void
-vport_del_channels(struct dpif_linux *dpif, odp_port_t port_no)
-{
- uint32_t port_idx = odp_to_u32(port_no);
- size_t i;
-
- if (!dpif->handlers || port_idx >= dpif->uc_array_size) {
- return;
- }
-
- /* Since the sock can only be assigned in either all or none
- * of "dpif->handlers" channels, the following check would
- * suffice. */
- if (!dpif->handlers[0].channels[port_idx].sock) {
- return;
- }
-
- for (i = 0; i < dpif->n_handlers; i++) {
- struct dpif_handler *handler = &dpif->handlers[i];
-
- epoll_ctl(handler->epoll_fd, EPOLL_CTL_DEL,
- nl_sock_fd(handler->channels[port_idx].sock), NULL);
- nl_sock_destroy(handler->channels[port_idx].sock);
- handler->channels[port_idx].sock = NULL;
- handler->event_offset = handler->n_events = 0;
- }
-}
-
-static void
-destroy_all_channels(struct dpif_linux *dpif) OVS_REQ_WRLOCK(dpif->upcall_lock)
-{
- unsigned int i;
-
- if (!dpif->handlers) {
- return;
- }
-
- for (i = 0; i < dpif->uc_array_size; i++ ) {
- struct dpif_linux_vport vport_request;
- uint32_t upcall_pids = 0;
-
- /* Since the sock can only be assigned in either all or none
- * of "dpif->handlers" channels, the following check would
- * suffice. */
- if (!dpif->handlers[0].channels[i].sock) {
- continue;
- }
-
- /* Turn off upcalls. */
- dpif_linux_vport_init(&vport_request);
- vport_request.cmd = OVS_VPORT_CMD_SET;
- vport_request.dp_ifindex = dpif->dp_ifindex;
- vport_request.port_no = u32_to_odp(i);
- vport_request.upcall_pids = &upcall_pids;
- dpif_linux_vport_transact(&vport_request, NULL, NULL);
-
- vport_del_channels(dpif, u32_to_odp(i));
- }
-
- for (i = 0; i < dpif->n_handlers; i++) {
- struct dpif_handler *handler = &dpif->handlers[i];
-
- close(handler->epoll_fd);
- free(handler->epoll_events);
- free(handler->channels);
- }
-
- free(dpif->handlers);
- dpif->handlers = NULL;
- dpif->n_handlers = 0;
- dpif->uc_array_size = 0;
-}
-
-static void
-dpif_linux_close(struct dpif *dpif_)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- nl_sock_destroy(dpif->port_notifier);
-
- fat_rwlock_wrlock(&dpif->upcall_lock);
- destroy_all_channels(dpif);
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- fat_rwlock_destroy(&dpif->upcall_lock);
- free(dpif);
-}
-
-static int
-dpif_linux_destroy(struct dpif *dpif_)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- struct dpif_linux_dp dp;
-
- dpif_linux_dp_init(&dp);
- dp.cmd = OVS_DP_CMD_DEL;
- dp.dp_ifindex = dpif->dp_ifindex;
- return dpif_linux_dp_transact(&dp, NULL, NULL);
-}
-
-static void
-dpif_linux_run(struct dpif *dpif_)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- if (dpif->refresh_channels) {
- dpif->refresh_channels = false;
- fat_rwlock_wrlock(&dpif->upcall_lock);
- dpif_linux_refresh_channels(dpif, dpif->n_handlers);
- fat_rwlock_unlock(&dpif->upcall_lock);
- }
-}
-
-static int
-dpif_linux_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats)
-{
- struct dpif_linux_dp dp;
- struct ofpbuf *buf;
- int error;
-
- error = dpif_linux_dp_get(dpif_, &dp, &buf);
- if (!error) {
- memset(stats, 0, sizeof *stats);
-
- if (dp.stats) {
- stats->n_hit = get_32aligned_u64(&dp.stats->n_hit);
- stats->n_missed = get_32aligned_u64(&dp.stats->n_missed);
- stats->n_lost = get_32aligned_u64(&dp.stats->n_lost);
- stats->n_flows = get_32aligned_u64(&dp.stats->n_flows);
- }
-
- if (dp.megaflow_stats) {
- stats->n_masks = dp.megaflow_stats->n_masks;
- stats->n_mask_hit = get_32aligned_u64(
- &dp.megaflow_stats->n_mask_hit);
- } else {
- stats->n_masks = UINT32_MAX;
- stats->n_mask_hit = UINT64_MAX;
- }
- ofpbuf_delete(buf);
- }
- return error;
-}
-
-static const char *
-get_vport_type(const struct dpif_linux_vport *vport)
-{
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
-
- switch (vport->type) {
- case OVS_VPORT_TYPE_NETDEV: {
- const char *type = netdev_get_type_from_name(vport->name);
-
- return type ? type : "system";
- }
-
- case OVS_VPORT_TYPE_INTERNAL:
- return "internal";
-
- case OVS_VPORT_TYPE_GENEVE:
- return "geneve";
-
- case OVS_VPORT_TYPE_GRE:
- return "gre";
-
- case OVS_VPORT_TYPE_GRE64:
- return "gre64";
-
- case OVS_VPORT_TYPE_VXLAN:
- return "vxlan";
-
- case OVS_VPORT_TYPE_LISP:
- return "lisp";
-
- case OVS_VPORT_TYPE_UNSPEC:
- case __OVS_VPORT_TYPE_MAX:
- break;
- }
-
- VLOG_WARN_RL(&rl, "dp%d: port `%s' has unsupported type %u",
- vport->dp_ifindex, vport->name, (unsigned int) vport->type);
- return "unknown";
-}
-
-static enum ovs_vport_type
-netdev_to_ovs_vport_type(const struct netdev *netdev)
-{
- const char *type = netdev_get_type(netdev);
-
- if (!strcmp(type, "tap") || !strcmp(type, "system")) {
- return OVS_VPORT_TYPE_NETDEV;
- } else if (!strcmp(type, "internal")) {
- return OVS_VPORT_TYPE_INTERNAL;
- } else if (!strcmp(type, "geneve")) {
- return OVS_VPORT_TYPE_GENEVE;
- } else if (strstr(type, "gre64")) {
- return OVS_VPORT_TYPE_GRE64;
- } else if (strstr(type, "gre")) {
- return OVS_VPORT_TYPE_GRE;
- } else if (!strcmp(type, "vxlan")) {
- return OVS_VPORT_TYPE_VXLAN;
- } else if (!strcmp(type, "lisp")) {
- return OVS_VPORT_TYPE_LISP;
- } else {
- return OVS_VPORT_TYPE_UNSPEC;
- }
-}
-
-static int
-dpif_linux_port_add__(struct dpif_linux *dpif, struct netdev *netdev,
- odp_port_t *port_nop)
- OVS_REQ_WRLOCK(dpif->upcall_lock)
-{
- const struct netdev_tunnel_config *tnl_cfg;
- char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
- const char *name = netdev_vport_get_dpif_port(netdev,
- namebuf, sizeof namebuf);
- const char *type = netdev_get_type(netdev);
- struct dpif_linux_vport request, reply;
- struct ofpbuf *buf;
- uint64_t options_stub[64 / 8];
- struct ofpbuf options;
- struct nl_sock **socksp = NULL;
- uint32_t *upcall_pids;
- int error = 0;
-
- if (dpif->handlers) {
- socksp = vport_create_socksp(dpif->n_handlers, &error);
- if (!socksp) {
- return error;
- }
- }
-
- dpif_linux_vport_init(&request);
- request.cmd = OVS_VPORT_CMD_NEW;
- request.dp_ifindex = dpif->dp_ifindex;
- request.type = netdev_to_ovs_vport_type(netdev);
- if (request.type == OVS_VPORT_TYPE_UNSPEC) {
- VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has "
- "unsupported type `%s'",
- dpif_name(&dpif->dpif), name, type);
- vport_del_socksp(socksp, dpif->n_handlers);
- return EINVAL;
- }
- request.name = name;
-
- if (request.type == OVS_VPORT_TYPE_NETDEV) {
- netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false);
- }
-
- tnl_cfg = netdev_get_tunnel_config(netdev);
- if (tnl_cfg && tnl_cfg->dst_port != 0) {
- ofpbuf_use_stack(&options, options_stub, sizeof options_stub);
- nl_msg_put_u16(&options, OVS_TUNNEL_ATTR_DST_PORT,
- ntohs(tnl_cfg->dst_port));
- request.options = ofpbuf_data(&options);
- request.options_len = ofpbuf_size(&options);
- }
-
- request.port_no = *port_nop;
- upcall_pids = vport_socksp_to_pids(socksp, dpif->n_handlers);
- request.n_upcall_pids = socksp ? dpif->n_handlers : 1;
- request.upcall_pids = upcall_pids;
-
- error = dpif_linux_vport_transact(&request, &reply, &buf);
- if (!error) {
- *port_nop = reply.port_no;
- } else {
- if (error == EBUSY && *port_nop != ODPP_NONE) {
- VLOG_INFO("%s: requested port %"PRIu32" is in use",
- dpif_name(&dpif->dpif), *port_nop);
- }
-
- vport_del_socksp(socksp, dpif->n_handlers);
- goto exit;
- }
-
- if (socksp) {
- error = vport_add_channels(dpif, *port_nop, socksp);
- if (error) {
- VLOG_INFO("%s: could not add channel for port %s",
- dpif_name(&dpif->dpif), name);
-
- /* Delete the port. */
- dpif_linux_vport_init(&request);
- request.cmd = OVS_VPORT_CMD_DEL;
- request.dp_ifindex = dpif->dp_ifindex;
- request.port_no = *port_nop;
- dpif_linux_vport_transact(&request, NULL, NULL);
- vport_del_socksp(socksp, dpif->n_handlers);
- goto exit;
- }
- }
- free(socksp);
-
-exit:
- ofpbuf_delete(buf);
- free(upcall_pids);
-
- return error;
-}
-
-static int
-dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev,
- odp_port_t *port_nop)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- int error;
-
- fat_rwlock_wrlock(&dpif->upcall_lock);
- error = dpif_linux_port_add__(dpif, netdev, port_nop);
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- return error;
-}
-
-static int
-dpif_linux_port_del__(struct dpif_linux *dpif, odp_port_t port_no)
- OVS_REQ_WRLOCK(dpif->upcall_lock)
-{
- struct dpif_linux_vport vport;
- int error;
-
- dpif_linux_vport_init(&vport);
- vport.cmd = OVS_VPORT_CMD_DEL;
- vport.dp_ifindex = dpif->dp_ifindex;
- vport.port_no = port_no;
- error = dpif_linux_vport_transact(&vport, NULL, NULL);
-
- vport_del_channels(dpif, port_no);
-
- return error;
-}
-
-static int
-dpif_linux_port_del(struct dpif *dpif_, odp_port_t port_no)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- int error;
-
- fat_rwlock_wrlock(&dpif->upcall_lock);
- error = dpif_linux_port_del__(dpif, port_no);
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- return error;
-}
-
-static int
-dpif_linux_port_query__(const struct dpif_linux *dpif, odp_port_t port_no,
- const char *port_name, struct dpif_port *dpif_port)
-{
- struct dpif_linux_vport request;
- struct dpif_linux_vport reply;
- struct ofpbuf *buf;
- int error;
-
- dpif_linux_vport_init(&request);
- request.cmd = OVS_VPORT_CMD_GET;
- request.dp_ifindex = dpif->dp_ifindex;
- request.port_no = port_no;
- request.name = port_name;
-
- error = dpif_linux_vport_transact(&request, &reply, &buf);
- if (!error) {
- if (reply.dp_ifindex != request.dp_ifindex) {
- /* A query by name reported that 'port_name' is in some datapath
- * other than 'dpif', but the caller wants to know about 'dpif'. */
- error = ENODEV;
- } else if (dpif_port) {
- dpif_port->name = xstrdup(reply.name);
- dpif_port->type = xstrdup(get_vport_type(&reply));
- dpif_port->port_no = reply.port_no;
- }
- ofpbuf_delete(buf);
- }
- return error;
-}
-
-static int
-dpif_linux_port_query_by_number(const struct dpif *dpif_, odp_port_t port_no,
- struct dpif_port *dpif_port)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- return dpif_linux_port_query__(dpif, port_no, NULL, dpif_port);
-}
-
-static int
-dpif_linux_port_query_by_name(const struct dpif *dpif_, const char *devname,
- struct dpif_port *dpif_port)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- return dpif_linux_port_query__(dpif, 0, devname, dpif_port);
-}
-
-static uint32_t
-dpif_linux_port_get_pid__(const struct dpif_linux *dpif, odp_port_t port_no,
- uint32_t hash)
- OVS_REQ_RDLOCK(dpif->upcall_lock)
-{
- uint32_t port_idx = odp_to_u32(port_no);
- uint32_t pid = 0;
-
- if (dpif->handlers && dpif->uc_array_size > 0) {
- /* The ODPP_NONE "reserved" port number uses the "ovs-system"'s
- * channel, since it is not heavily loaded. */
- uint32_t idx = port_idx >= dpif->uc_array_size ? 0 : port_idx;
- struct dpif_handler *h = &dpif->handlers[hash % dpif->n_handlers];
-
- /* Needs to check in case the socket pointer is changed in between
- * the holding of upcall_lock. A known case happens when the main
- * thread deletes the vport while the handler thread is handling
- * the upcall from that port. */
- if (h->channels[idx].sock) {
- pid = nl_sock_pid(h->channels[idx].sock);
- }
- }
-
- return pid;
-}
-
-static uint32_t
-dpif_linux_port_get_pid(const struct dpif *dpif_, odp_port_t port_no,
- uint32_t hash)
-{
- const struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- uint32_t ret;
-
- fat_rwlock_rdlock(&dpif->upcall_lock);
- ret = dpif_linux_port_get_pid__(dpif, port_no, hash);
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- return ret;
-}
-
-static int
-dpif_linux_flow_flush(struct dpif *dpif_)
-{
- const struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- struct dpif_linux_flow flow;
-
- dpif_linux_flow_init(&flow);
- flow.cmd = OVS_FLOW_CMD_DEL;
- flow.dp_ifindex = dpif->dp_ifindex;
- return dpif_linux_flow_transact(&flow, NULL, NULL);
-}
-
-struct dpif_linux_port_state {
- struct nl_dump dump;
- struct ofpbuf buf;
-};
-
-static void
-dpif_linux_port_dump_start__(const struct dpif_linux *dpif,
- struct nl_dump *dump)
-{
- struct dpif_linux_vport request;
- struct ofpbuf *buf;
-
- dpif_linux_vport_init(&request);
- request.cmd = OVS_VPORT_CMD_GET;
- request.dp_ifindex = dpif->dp_ifindex;
-
- buf = ofpbuf_new(1024);
- dpif_linux_vport_to_ofpbuf(&request, buf);
- nl_dump_start(dump, NETLINK_GENERIC, buf);
- ofpbuf_delete(buf);
-}
-
-static int
-dpif_linux_port_dump_start(const struct dpif *dpif_, void **statep)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- struct dpif_linux_port_state *state;
-
- *statep = state = xmalloc(sizeof *state);
- dpif_linux_port_dump_start__(dpif, &state->dump);
-
- ofpbuf_init(&state->buf, NL_DUMP_BUFSIZE);
- return 0;
-}
-
-static int
-dpif_linux_port_dump_next__(const struct dpif_linux *dpif, struct nl_dump *dump,
- struct dpif_linux_vport *vport,
- struct ofpbuf *buffer)
-{
- struct ofpbuf buf;
- int error;
-
- if (!nl_dump_next(dump, &buf, buffer)) {
- return EOF;
- }
-
- error = dpif_linux_vport_from_ofpbuf(vport, &buf);
- if (error) {
- VLOG_WARN_RL(&error_rl, "%s: failed to parse vport record (%s)",
- dpif_name(&dpif->dpif), ovs_strerror(error));
- }
- return error;
-}
-
-static int
-dpif_linux_port_dump_next(const struct dpif *dpif_, void *state_,
- struct dpif_port *dpif_port)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- struct dpif_linux_port_state *state = state_;
- struct dpif_linux_vport vport;
- int error;
-
- error = dpif_linux_port_dump_next__(dpif, &state->dump, &vport,
- &state->buf);
- if (error) {
- return error;
- }
- dpif_port->name = CONST_CAST(char *, vport.name);
- dpif_port->type = CONST_CAST(char *, get_vport_type(&vport));
- dpif_port->port_no = vport.port_no;
- return 0;
-}
-
-static int
-dpif_linux_port_dump_done(const struct dpif *dpif_ OVS_UNUSED, void *state_)
-{
- struct dpif_linux_port_state *state = state_;
- int error = nl_dump_done(&state->dump);
-
- ofpbuf_uninit(&state->buf);
- free(state);
- return error;
-}
-
-static int
-dpif_linux_port_poll(const struct dpif *dpif_, char **devnamep)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- /* Lazily create the Netlink socket to listen for notifications. */
- if (!dpif->port_notifier) {
- struct nl_sock *sock;
- int error;
-
- error = nl_sock_create(NETLINK_GENERIC, &sock);
- if (error) {
- return error;
- }
-
- error = nl_sock_join_mcgroup(sock, ovs_vport_mcgroup);
- if (error) {
- nl_sock_destroy(sock);
- return error;
- }
- dpif->port_notifier = sock;
-
- /* We have no idea of the current state so report that everything
- * changed. */
- return ENOBUFS;
- }
-
- for (;;) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- uint64_t buf_stub[4096 / 8];
- struct ofpbuf buf;
- int error;
-
- ofpbuf_use_stub(&buf, buf_stub, sizeof buf_stub);
- error = nl_sock_recv(dpif->port_notifier, &buf, false);
- if (!error) {
- struct dpif_linux_vport vport;
-
- error = dpif_linux_vport_from_ofpbuf(&vport, &buf);
- if (!error) {
- if (vport.dp_ifindex == dpif->dp_ifindex
- && (vport.cmd == OVS_VPORT_CMD_NEW
- || vport.cmd == OVS_VPORT_CMD_DEL
- || vport.cmd == OVS_VPORT_CMD_SET)) {
- VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8,
- dpif->dpif.full_name, vport.name, vport.cmd);
- if (vport.cmd == OVS_VPORT_CMD_DEL && dpif->handlers) {
- dpif->refresh_channels = true;
- }
- *devnamep = xstrdup(vport.name);
- ofpbuf_uninit(&buf);
- return 0;
- }
- }
- } else if (error != EAGAIN) {
- VLOG_WARN_RL(&rl, "error reading or parsing netlink (%s)",
- ovs_strerror(error));
- nl_sock_drain(dpif->port_notifier);
- error = ENOBUFS;
- }
-
- ofpbuf_uninit(&buf);
- if (error) {
- return error;
- }
- }
-}
-
-static void
-dpif_linux_port_poll_wait(const struct dpif *dpif_)
-{
- const struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- if (dpif->port_notifier) {
- nl_sock_wait(dpif->port_notifier, POLLIN);
- } else {
- poll_immediate_wake();
- }
-}
-
-static void
-dpif_linux_init_flow_get(const struct dpif_linux *dpif,
- const struct nlattr *key, size_t key_len,
- struct dpif_linux_flow *request)
-{
- dpif_linux_flow_init(request);
- request->cmd = OVS_FLOW_CMD_GET;
- request->dp_ifindex = dpif->dp_ifindex;
- request->key = key;
- request->key_len = key_len;
-}
-
-static int
-dpif_linux_flow_get(const struct dpif_linux *dpif,
- const struct nlattr *key, size_t key_len,
- struct dpif_linux_flow *reply, struct ofpbuf **bufp)
-{
- struct dpif_linux_flow request;
-
- dpif_linux_init_flow_get(dpif, key, key_len, &request);
- return dpif_linux_flow_transact(&request, reply, bufp);
-}
-
-static void
-dpif_linux_init_flow_put(struct dpif_linux *dpif, const struct dpif_flow_put *put,
- struct dpif_linux_flow *request)
-{
- static const struct nlattr dummy_action;
-
- dpif_linux_flow_init(request);
- request->cmd = (put->flags & DPIF_FP_CREATE
- ? OVS_FLOW_CMD_NEW : OVS_FLOW_CMD_SET);
- request->dp_ifindex = dpif->dp_ifindex;
- request->key = put->key;
- request->key_len = put->key_len;
- request->mask = put->mask;
- request->mask_len = put->mask_len;
- /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */
- request->actions = (put->actions
- ? put->actions
- : CONST_CAST(struct nlattr *, &dummy_action));
- request->actions_len = put->actions_len;
- if (put->flags & DPIF_FP_ZERO_STATS) {
- request->clear = true;
- }
- request->nlmsg_flags = put->flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE;
-}
-
-static void
-dpif_linux_init_flow_del(struct dpif_linux *dpif, const struct dpif_flow_del *del,
- struct dpif_linux_flow *request)
-{
- dpif_linux_flow_init(request);
- request->cmd = OVS_FLOW_CMD_DEL;
- request->dp_ifindex = dpif->dp_ifindex;
- request->key = del->key;
- request->key_len = del->key_len;
-}
-
-struct dpif_linux_flow_dump {
- struct dpif_flow_dump up;
- struct nl_dump nl_dump;
- atomic_int status;
-};
-
-static struct dpif_linux_flow_dump *
-dpif_linux_flow_dump_cast(struct dpif_flow_dump *dump)
-{
- return CONTAINER_OF(dump, struct dpif_linux_flow_dump, up);
-}
-
-static struct dpif_flow_dump *
-dpif_linux_flow_dump_create(const struct dpif *dpif_)
-{
- const struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- struct dpif_linux_flow_dump *dump;
- struct dpif_linux_flow request;
- struct ofpbuf *buf;
-
- dump = xmalloc(sizeof *dump);
- dpif_flow_dump_init(&dump->up, dpif_);
-
- dpif_linux_flow_init(&request);
- request.cmd = OVS_FLOW_CMD_GET;
- request.dp_ifindex = dpif->dp_ifindex;
-
- buf = ofpbuf_new(1024);
- dpif_linux_flow_to_ofpbuf(&request, buf);
- nl_dump_start(&dump->nl_dump, NETLINK_GENERIC, buf);
- ofpbuf_delete(buf);
- atomic_init(&dump->status, 0);
-
- return &dump->up;
-}
-
-static int
-dpif_linux_flow_dump_destroy(struct dpif_flow_dump *dump_)
-{
- struct dpif_linux_flow_dump *dump = dpif_linux_flow_dump_cast(dump_);
- unsigned int nl_status = nl_dump_done(&dump->nl_dump);
- int dump_status;
-
- /* No other thread has access to 'dump' at this point. */
- atomic_read_relaxed(&dump->status, &dump_status);
- free(dump);
- return dump_status ? dump_status : nl_status;
-}
-
-struct dpif_linux_flow_dump_thread {
- struct dpif_flow_dump_thread up;
- struct dpif_linux_flow_dump *dump;
- struct dpif_linux_flow flow;
- struct dpif_flow_stats stats;
- struct ofpbuf nl_flows; /* Always used to store flows. */
- struct ofpbuf *nl_actions; /* Used if kernel does not supply actions. */
-};
-
-static struct dpif_linux_flow_dump_thread *
-dpif_linux_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
-{
- return CONTAINER_OF(thread, struct dpif_linux_flow_dump_thread, up);
-}
-
-static struct dpif_flow_dump_thread *
-dpif_linux_flow_dump_thread_create(struct dpif_flow_dump *dump_)
-{
- struct dpif_linux_flow_dump *dump = dpif_linux_flow_dump_cast(dump_);
- struct dpif_linux_flow_dump_thread *thread;
-
- thread = xmalloc(sizeof *thread);
- dpif_flow_dump_thread_init(&thread->up, &dump->up);
- thread->dump = dump;
- ofpbuf_init(&thread->nl_flows, NL_DUMP_BUFSIZE);
- thread->nl_actions = NULL;
-
- return &thread->up;
-}
-
-static void
-dpif_linux_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
-{
- struct dpif_linux_flow_dump_thread *thread
- = dpif_linux_flow_dump_thread_cast(thread_);
-
- ofpbuf_uninit(&thread->nl_flows);
- ofpbuf_delete(thread->nl_actions);
- free(thread);
-}
-
-static void
-dpif_linux_flow_to_dpif_flow(struct dpif_flow *dpif_flow,
- const struct dpif_linux_flow *linux_flow)
-{
- dpif_flow->key = linux_flow->key;
- dpif_flow->key_len = linux_flow->key_len;
- dpif_flow->mask = linux_flow->mask;
- dpif_flow->mask_len = linux_flow->mask_len;
- dpif_flow->actions = linux_flow->actions;
- dpif_flow->actions_len = linux_flow->actions_len;
- dpif_linux_flow_get_stats(linux_flow, &dpif_flow->stats);
-}
-
-static int
-dpif_linux_flow_dump_next(struct dpif_flow_dump_thread *thread_,
- struct dpif_flow *flows, int max_flows)
-{
- struct dpif_linux_flow_dump_thread *thread
- = dpif_linux_flow_dump_thread_cast(thread_);
- struct dpif_linux_flow_dump *dump = thread->dump;
- struct dpif_linux *dpif = dpif_linux_cast(thread->up.dpif);
- int n_flows;
-
- ofpbuf_delete(thread->nl_actions);
- thread->nl_actions = NULL;
-
- n_flows = 0;
- while (!n_flows
- || (n_flows < max_flows && ofpbuf_size(&thread->nl_flows))) {
- struct dpif_linux_flow linux_flow;
- struct ofpbuf nl_flow;
- int error;
-
- /* Try to grab another flow. */
- if (!nl_dump_next(&dump->nl_dump, &nl_flow, &thread->nl_flows)) {
- break;
- }
-
- /* Convert the flow to our output format. */
- error = dpif_linux_flow_from_ofpbuf(&linux_flow, &nl_flow);
- if (error) {
- atomic_store_relaxed(&dump->status, error);
- break;
- }
-
- if (linux_flow.actions) {
- /* Common case: the flow includes actions. */
- dpif_linux_flow_to_dpif_flow(&flows[n_flows++], &linux_flow);
- } else {
- /* Rare case: the flow does not include actions. Retrieve this
- * individual flow again to get the actions. */
- error = dpif_linux_flow_get(dpif, linux_flow.key,
- linux_flow.key_len, &linux_flow,
- &thread->nl_actions);
- if (error == ENOENT) {
- VLOG_DBG("dumped flow disappeared on get");
- continue;
- } else if (error) {
- VLOG_WARN("error fetching dumped flow: %s",
- ovs_strerror(error));
- atomic_store_relaxed(&dump->status, error);
- break;
- }
-
- /* Save this flow. Then exit, because we only have one buffer to
- * handle this case. */
- dpif_linux_flow_to_dpif_flow(&flows[n_flows++], &linux_flow);
- break;
- }
- }
- return n_flows;
-}
-
-static void
-dpif_linux_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec,
- struct ofpbuf *buf)
-{
- struct ovs_header *k_exec;
- size_t key_ofs;
-
- ofpbuf_prealloc_tailroom(buf, (64
- + ofpbuf_size(d_exec->packet)
- + ODP_KEY_METADATA_SIZE
- + d_exec->actions_len));
-
- nl_msg_put_genlmsghdr(buf, 0, ovs_packet_family, NLM_F_REQUEST,
- OVS_PACKET_CMD_EXECUTE, OVS_PACKET_VERSION);
-
- k_exec = ofpbuf_put_uninit(buf, sizeof *k_exec);
- k_exec->dp_ifindex = dp_ifindex;
-
- nl_msg_put_unspec(buf, OVS_PACKET_ATTR_PACKET,
- ofpbuf_data(d_exec->packet),
- ofpbuf_size(d_exec->packet));
-
- key_ofs = nl_msg_start_nested(buf, OVS_PACKET_ATTR_KEY);
- odp_key_from_pkt_metadata(buf, &d_exec->md);
- nl_msg_end_nested(buf, key_ofs);
-
- nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS,
- d_exec->actions, d_exec->actions_len);
-}
-
-#define MAX_OPS 50
-
-static void
-dpif_linux_operate__(struct dpif_linux *dpif,
- struct dpif_op **ops, size_t n_ops)
-{
- struct op_auxdata {
- struct nl_transaction txn;
-
- struct ofpbuf request;
- uint64_t request_stub[1024 / 8];
-
- struct ofpbuf reply;
- uint64_t reply_stub[1024 / 8];
- } auxes[MAX_OPS];
-
- struct nl_transaction *txnsp[MAX_OPS];
- size_t i;
-
- ovs_assert(n_ops <= MAX_OPS);
- for (i = 0; i < n_ops; i++) {
- struct op_auxdata *aux = &auxes[i];
- struct dpif_op *op = ops[i];
- struct dpif_flow_put *put;
- struct dpif_flow_del *del;
- struct dpif_execute *execute;
- struct dpif_flow_get *get;
- struct dpif_linux_flow flow;
-
- ofpbuf_use_stub(&aux->request,
- aux->request_stub, sizeof aux->request_stub);
- aux->txn.request = &aux->request;
-
- ofpbuf_use_stub(&aux->reply, aux->reply_stub, sizeof aux->reply_stub);
- aux->txn.reply = NULL;
-
- switch (op->type) {
- case DPIF_OP_FLOW_PUT:
- put = &op->u.flow_put;
- dpif_linux_init_flow_put(dpif, put, &flow);
- if (put->stats) {
- flow.nlmsg_flags |= NLM_F_ECHO;
- aux->txn.reply = &aux->reply;
- }
- dpif_linux_flow_to_ofpbuf(&flow, &aux->request);
- break;
-
- case DPIF_OP_FLOW_DEL:
- del = &op->u.flow_del;
- dpif_linux_init_flow_del(dpif, del, &flow);
- if (del->stats) {
- flow.nlmsg_flags |= NLM_F_ECHO;
- aux->txn.reply = &aux->reply;
- }
- dpif_linux_flow_to_ofpbuf(&flow, &aux->request);
- break;
-
- case DPIF_OP_EXECUTE:
- execute = &op->u.execute;
- dpif_linux_encode_execute(dpif->dp_ifindex, execute,
- &aux->request);
- break;
-
- case DPIF_OP_FLOW_GET:
- get = &op->u.flow_get;
- dpif_linux_init_flow_get(dpif, get->key, get->key_len, &flow);
- aux->txn.reply = get->buffer;
- dpif_linux_flow_to_ofpbuf(&flow, &aux->request);
- break;
-
- default:
- OVS_NOT_REACHED();
- }
- }
-
- for (i = 0; i < n_ops; i++) {
- txnsp[i] = &auxes[i].txn;
- }
- nl_transact_multiple(NETLINK_GENERIC, txnsp, n_ops);
-
- for (i = 0; i < n_ops; i++) {
- struct op_auxdata *aux = &auxes[i];
- struct nl_transaction *txn = &auxes[i].txn;
- struct dpif_op *op = ops[i];
- struct dpif_flow_put *put;
- struct dpif_flow_del *del;
- struct dpif_flow_get *get;
-
- op->error = txn->error;
-
- switch (op->type) {
- case DPIF_OP_FLOW_PUT:
- put = &op->u.flow_put;
- if (put->stats) {
- if (!op->error) {
- struct dpif_linux_flow reply;
-
- op->error = dpif_linux_flow_from_ofpbuf(&reply,
- txn->reply);
- if (!op->error) {
- dpif_linux_flow_get_stats(&reply, put->stats);
- }
- }
- }
- break;
-
- case DPIF_OP_FLOW_DEL:
- del = &op->u.flow_del;
- if (del->stats) {
- if (!op->error) {
- struct dpif_linux_flow reply;
-
- op->error = dpif_linux_flow_from_ofpbuf(&reply,
- txn->reply);
- if (!op->error) {
- dpif_linux_flow_get_stats(&reply, del->stats);
- }
- }
- }
- break;
-
- case DPIF_OP_EXECUTE:
- break;
-
- case DPIF_OP_FLOW_GET:
- get = &op->u.flow_get;
- if (!op->error) {
- struct dpif_linux_flow reply;
-
- op->error = dpif_linux_flow_from_ofpbuf(&reply, txn->reply);
- if (!op->error) {
- dpif_linux_flow_to_dpif_flow(get->flow, &reply);
- }
- }
- break;
-
- default:
- OVS_NOT_REACHED();
- }
-
- ofpbuf_uninit(&aux->request);
- ofpbuf_uninit(&aux->reply);
- }
-}
-
-static void
-dpif_linux_operate(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- while (n_ops > 0) {
- size_t chunk = MIN(n_ops, MAX_OPS);
- dpif_linux_operate__(dpif, ops, chunk);
- ops += chunk;
- n_ops -= chunk;
- }
-}
-
-/* Synchronizes 'channels' in 'dpif->handlers' with the set of vports
- * currently in 'dpif' in the kernel, by adding a new set of channels for
- * any kernel vport that lacks one and deleting any channels that have no
- * backing kernel vports. */
-static int
-dpif_linux_refresh_channels(struct dpif_linux *dpif, uint32_t n_handlers)
- OVS_REQ_WRLOCK(dpif->upcall_lock)
-{
- unsigned long int *keep_channels;
- struct dpif_linux_vport vport;
- size_t keep_channels_nbits;
- struct nl_dump dump;
- uint64_t reply_stub[NL_DUMP_BUFSIZE / 8];
- struct ofpbuf buf;
- int retval = 0;
- size_t i;
-
- if (dpif->n_handlers != n_handlers) {
- destroy_all_channels(dpif);
- dpif->handlers = xzalloc(n_handlers * sizeof *dpif->handlers);
- for (i = 0; i < n_handlers; i++) {
- struct dpif_handler *handler = &dpif->handlers[i];
-
- handler->epoll_fd = epoll_create(10);
- if (handler->epoll_fd < 0) {
- size_t j;
-
- for (j = 0; j < i; j++) {
- close(dpif->handlers[j].epoll_fd);
- }
- free(dpif->handlers);
- dpif->handlers = NULL;
-
- return errno;
- }
- }
- dpif->n_handlers = n_handlers;
- }
-
- for (i = 0; i < n_handlers; i++) {
- struct dpif_handler *handler = &dpif->handlers[i];
-
- handler->event_offset = handler->n_events = 0;
- }
-
- keep_channels_nbits = dpif->uc_array_size;
- keep_channels = bitmap_allocate(keep_channels_nbits);
-
- ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub);
- dpif_linux_port_dump_start__(dpif, &dump);
- while (!dpif_linux_port_dump_next__(dpif, &dump, &vport, &buf)) {
- uint32_t port_no = odp_to_u32(vport.port_no);
- uint32_t *upcall_pids = NULL;
- int error;
-
- if (port_no >= dpif->uc_array_size
- || !vport_get_pids(dpif, port_no, &upcall_pids)) {
- struct nl_sock **socksp = vport_create_socksp(dpif->n_handlers,
- &error);
-
- if (!socksp) {
- goto error;
- }
-
- error = vport_add_channels(dpif, vport.port_no, socksp);
- if (error) {
- VLOG_INFO("%s: could not add channels for port %s",
- dpif_name(&dpif->dpif), vport.name);
- vport_del_socksp(socksp, dpif->n_handlers);
- retval = error;
- goto error;
- }
- upcall_pids = vport_socksp_to_pids(socksp, dpif->n_handlers);
- free(socksp);
- }
-
- /* Configure the vport to deliver misses to 'sock'. */
- if (vport.upcall_pids[0] == 0
- || vport.n_upcall_pids != dpif->n_handlers
- || memcmp(upcall_pids, vport.upcall_pids, n_handlers * sizeof
- *upcall_pids)) {
- struct dpif_linux_vport vport_request;
-
- dpif_linux_vport_init(&vport_request);
- vport_request.cmd = OVS_VPORT_CMD_SET;
- vport_request.dp_ifindex = dpif->dp_ifindex;
- vport_request.port_no = vport.port_no;
- vport_request.n_upcall_pids = dpif->n_handlers;
- vport_request.upcall_pids = upcall_pids;
- error = dpif_linux_vport_transact(&vport_request, NULL, NULL);
- if (error) {
- VLOG_WARN_RL(&error_rl,
- "%s: failed to set upcall pid on port: %s",
- dpif_name(&dpif->dpif), ovs_strerror(error));
-
- if (error != ENODEV && error != ENOENT) {
- retval = error;
- } else {
- /* The vport isn't really there, even though the dump says
- * it is. Probably we just hit a race after a port
- * disappeared. */
- }
- goto error;
- }
- }
-
- if (port_no < keep_channels_nbits) {
- bitmap_set1(keep_channels, port_no);
- }
- free(upcall_pids);
- continue;
-
- error:
- free(upcall_pids);
- vport_del_channels(dpif, vport.port_no);
- }
- nl_dump_done(&dump);
- ofpbuf_uninit(&buf);
-
- /* Discard any saved channels that we didn't reuse. */
- for (i = 0; i < keep_channels_nbits; i++) {
- if (!bitmap_is_set(keep_channels, i)) {
- vport_del_channels(dpif, u32_to_odp(i));
- }
- }
- free(keep_channels);
-
- return retval;
-}
-
-static int
-dpif_linux_recv_set__(struct dpif_linux *dpif, bool enable)
- OVS_REQ_WRLOCK(dpif->upcall_lock)
-{
- if ((dpif->handlers != NULL) == enable) {
- return 0;
- } else if (!enable) {
- destroy_all_channels(dpif);
- return 0;
- } else {
- return dpif_linux_refresh_channels(dpif, 1);
- }
-}
-
-static int
-dpif_linux_recv_set(struct dpif *dpif_, bool enable)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- int error;
-
- fat_rwlock_wrlock(&dpif->upcall_lock);
- error = dpif_linux_recv_set__(dpif, enable);
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- return error;
-}
-
-static int
-dpif_linux_handlers_set(struct dpif *dpif_, uint32_t n_handlers)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- int error = 0;
-
- fat_rwlock_wrlock(&dpif->upcall_lock);
- if (dpif->handlers) {
- error = dpif_linux_refresh_channels(dpif, n_handlers);
- }
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- return error;
-}
-
-static int
-dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
- uint32_t queue_id, uint32_t *priority)
-{
- if (queue_id < 0xf000) {
- *priority = TC_H_MAKE(1 << 16, queue_id + 1);
- return 0;
- } else {
- return EINVAL;
- }
-}
-
-static int
-parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall,
- int *dp_ifindex)
-{
- static const struct nl_policy ovs_packet_policy[] = {
- /* Always present. */
- [OVS_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC,
- .min_len = ETH_HEADER_LEN },
- [OVS_PACKET_ATTR_KEY] = { .type = NL_A_NESTED },
-
- /* OVS_PACKET_CMD_ACTION only. */
- [OVS_PACKET_ATTR_USERDATA] = { .type = NL_A_UNSPEC, .optional = true },
- [OVS_PACKET_ATTR_EGRESS_TUN_KEY] = { .type = NL_A_NESTED, .optional = true },
- };
-
- struct ovs_header *ovs_header;
- struct nlattr *a[ARRAY_SIZE(ovs_packet_policy)];
- struct nlmsghdr *nlmsg;
- struct genlmsghdr *genl;
- struct ofpbuf b;
- int type;
-
- ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
-
- nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
- genl = ofpbuf_try_pull(&b, sizeof *genl);
- ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
- if (!nlmsg || !genl || !ovs_header
- || nlmsg->nlmsg_type != ovs_packet_family
- || !nl_policy_parse(&b, 0, ovs_packet_policy, a,
- ARRAY_SIZE(ovs_packet_policy))) {
- return EINVAL;
- }
-
- type = (genl->cmd == OVS_PACKET_CMD_MISS ? DPIF_UC_MISS
- : genl->cmd == OVS_PACKET_CMD_ACTION ? DPIF_UC_ACTION
- : -1);
- if (type < 0) {
- return EINVAL;
- }
-
- /* (Re)set ALL fields of '*upcall' on successful return. */
- upcall->type = type;
- upcall->key = CONST_CAST(struct nlattr *,
- nl_attr_get(a[OVS_PACKET_ATTR_KEY]));
- upcall->key_len = nl_attr_get_size(a[OVS_PACKET_ATTR_KEY]);
- upcall->userdata = a[OVS_PACKET_ATTR_USERDATA];
- upcall->out_tun_key = a[OVS_PACKET_ATTR_EGRESS_TUN_KEY];
-
- /* Allow overwriting the netlink attribute header without reallocating. */
- ofpbuf_use_stub(&upcall->packet,
- CONST_CAST(struct nlattr *,
- nl_attr_get(a[OVS_PACKET_ATTR_PACKET])) - 1,
- nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]) +
- sizeof(struct nlattr));
- ofpbuf_set_data(&upcall->packet,
- (char *)ofpbuf_data(&upcall->packet) + sizeof(struct nlattr));
- ofpbuf_set_size(&upcall->packet, nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]));
-
- *dp_ifindex = ovs_header->dp_ifindex;
-
- return 0;
-}
-
-static int
-dpif_linux_recv__(struct dpif_linux *dpif, uint32_t handler_id,
- struct dpif_upcall *upcall, struct ofpbuf *buf)
- OVS_REQ_RDLOCK(dpif->upcall_lock)
-{
- struct dpif_handler *handler;
- int read_tries = 0;
-
- if (!dpif->handlers || handler_id >= dpif->n_handlers) {
- return EAGAIN;
- }
-
- handler = &dpif->handlers[handler_id];
- if (handler->event_offset >= handler->n_events) {
- int retval;
-
- handler->event_offset = handler->n_events = 0;
-
- do {
- retval = epoll_wait(handler->epoll_fd, handler->epoll_events,
- dpif->uc_array_size, 0);
- } while (retval < 0 && errno == EINTR);
- if (retval < 0) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
- VLOG_WARN_RL(&rl, "epoll_wait failed (%s)", ovs_strerror(errno));
- } else if (retval > 0) {
- handler->n_events = retval;
- }
- }
-
- while (handler->event_offset < handler->n_events) {
- int idx = handler->epoll_events[handler->event_offset].data.u32;
- struct dpif_channel *ch = &dpif->handlers[handler_id].channels[idx];
-
- handler->event_offset++;
-
- for (;;) {
- int dp_ifindex;
- int error;
-
- if (++read_tries > 50) {
- return EAGAIN;
- }
-
- error = nl_sock_recv(ch->sock, buf, false);
- if (error == ENOBUFS) {
- /* ENOBUFS typically means that we've received so many
- * packets that the buffer overflowed. Try again
- * immediately because there's almost certainly a packet
- * waiting for us. */
- report_loss(dpif, ch, idx, handler_id);
- continue;
- }
-
- ch->last_poll = time_msec();
- if (error) {
- if (error == EAGAIN) {
- break;
- }
- return error;
- }
-
- error = parse_odp_packet(buf, upcall, &dp_ifindex);
- if (!error && dp_ifindex == dpif->dp_ifindex) {
- return 0;
- } else if (error) {
- return error;
- }
- }
- }
-
- return EAGAIN;
-}
-
-static int
-dpif_linux_recv(struct dpif *dpif_, uint32_t handler_id,
- struct dpif_upcall *upcall, struct ofpbuf *buf)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- int error;
-
- fat_rwlock_rdlock(&dpif->upcall_lock);
- error = dpif_linux_recv__(dpif, handler_id, upcall, buf);
- fat_rwlock_unlock(&dpif->upcall_lock);
-
- return error;
-}
-
-static void
-dpif_linux_recv_wait__(struct dpif_linux *dpif, uint32_t handler_id)
- OVS_REQ_RDLOCK(dpif->upcall_lock)
-{
- if (dpif->handlers && handler_id < dpif->n_handlers) {
- struct dpif_handler *handler = &dpif->handlers[handler_id];
-
- poll_fd_wait(handler->epoll_fd, POLLIN);
- }
-}
-
-static void
-dpif_linux_recv_wait(struct dpif *dpif_, uint32_t handler_id)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- fat_rwlock_rdlock(&dpif->upcall_lock);
- dpif_linux_recv_wait__(dpif, handler_id);
- fat_rwlock_unlock(&dpif->upcall_lock);
-}
-
-static void
-dpif_linux_recv_purge__(struct dpif_linux *dpif)
- OVS_REQ_WRLOCK(dpif->upcall_lock)
-{
- if (dpif->handlers) {
- size_t i, j;
-
- for (i = 0; i < dpif->uc_array_size; i++ ) {
- if (!dpif->handlers[0].channels[i].sock) {
- continue;
- }
-
- for (j = 0; j < dpif->n_handlers; j++) {
- nl_sock_drain(dpif->handlers[j].channels[i].sock);
- }
- }
- }
-}
-
-static void
-dpif_linux_recv_purge(struct dpif *dpif_)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-
- fat_rwlock_wrlock(&dpif->upcall_lock);
- dpif_linux_recv_purge__(dpif);
- fat_rwlock_unlock(&dpif->upcall_lock);
-}
-
-const struct dpif_class dpif_linux_class = {
- "system",
- dpif_linux_enumerate,
- NULL,
- dpif_linux_open,
- dpif_linux_close,
- dpif_linux_destroy,
- dpif_linux_run,
- NULL, /* wait */
- dpif_linux_get_stats,
- dpif_linux_port_add,
- dpif_linux_port_del,
- dpif_linux_port_query_by_number,
- dpif_linux_port_query_by_name,
- dpif_linux_port_get_pid,
- dpif_linux_port_dump_start,
- dpif_linux_port_dump_next,
- dpif_linux_port_dump_done,
- dpif_linux_port_poll,
- dpif_linux_port_poll_wait,
- dpif_linux_flow_flush,
- dpif_linux_flow_dump_create,
- dpif_linux_flow_dump_destroy,
- dpif_linux_flow_dump_thread_create,
- dpif_linux_flow_dump_thread_destroy,
- dpif_linux_flow_dump_next,
- dpif_linux_operate,
- dpif_linux_recv_set,
- dpif_linux_handlers_set,
- dpif_linux_queue_to_priority,
- dpif_linux_recv,
- dpif_linux_recv_wait,
- dpif_linux_recv_purge,
- NULL, /* register_upcall_cb */
- NULL, /* enable_upcall */
- NULL, /* disable_upcall */
-};
-\f
-static int
-dpif_linux_init(void)
-{
- static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
- static int error;
-
- if (ovsthread_once_start(&once)) {
- error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY,
- &ovs_datapath_family);
- if (error) {
- VLOG_ERR("Generic Netlink family '%s' does not exist. "
- "The Open vSwitch kernel module is probably not loaded.",
- OVS_DATAPATH_FAMILY);
- }
- if (!error) {
- error = nl_lookup_genl_family(OVS_VPORT_FAMILY, &ovs_vport_family);
- }
- if (!error) {
- error = nl_lookup_genl_family(OVS_FLOW_FAMILY, &ovs_flow_family);
- }
- if (!error) {
- error = nl_lookup_genl_family(OVS_PACKET_FAMILY,
- &ovs_packet_family);
- }
- if (!error) {
- error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP,
- &ovs_vport_mcgroup);
- }
-
- ovsthread_once_done(&once);
- }
-
- return error;
-}
-
-bool
-dpif_linux_is_internal_device(const char *name)
-{
- struct dpif_linux_vport reply;
- struct ofpbuf *buf;
- int error;
-
- error = dpif_linux_vport_get(name, &reply, &buf);
- if (!error) {
- ofpbuf_delete(buf);
- } else if (error != ENODEV && error != ENOENT) {
- VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)",
- name, ovs_strerror(error));
- }
-
- return reply.type == OVS_VPORT_TYPE_INTERNAL;
-}
-\f
-/* Parses the contents of 'buf', which contains a "struct ovs_header" followed
- * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a
- * positive errno value.
- *
- * 'vport' will contain pointers into 'buf', so the caller should not free
- * 'buf' while 'vport' is still in use. */
-static int
-dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport,
- const struct ofpbuf *buf)
-{
- static const struct nl_policy ovs_vport_policy[] = {
- [OVS_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 },
- [OVS_VPORT_ATTR_TYPE] = { .type = NL_A_U32 },
- [OVS_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ },
- [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NL_A_UNSPEC },
- [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats),
- .optional = true },
- [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
- };
-
- struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)];
- struct ovs_header *ovs_header;
- struct nlmsghdr *nlmsg;
- struct genlmsghdr *genl;
- struct ofpbuf b;
-
- dpif_linux_vport_init(vport);
-
- ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
- nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
- genl = ofpbuf_try_pull(&b, sizeof *genl);
- ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
- if (!nlmsg || !genl || !ovs_header
- || nlmsg->nlmsg_type != ovs_vport_family
- || !nl_policy_parse(&b, 0, ovs_vport_policy, a,
- ARRAY_SIZE(ovs_vport_policy))) {
- return EINVAL;
- }
-
- vport->cmd = genl->cmd;
- vport->dp_ifindex = ovs_header->dp_ifindex;
- vport->port_no = nl_attr_get_odp_port(a[OVS_VPORT_ATTR_PORT_NO]);
- vport->type = nl_attr_get_u32(a[OVS_VPORT_ATTR_TYPE]);
- vport->name = nl_attr_get_string(a[OVS_VPORT_ATTR_NAME]);
- if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
- vport->n_upcall_pids = nl_attr_get_size(a[OVS_VPORT_ATTR_UPCALL_PID])
- / (sizeof *vport->upcall_pids);
- vport->upcall_pids = nl_attr_get(a[OVS_VPORT_ATTR_UPCALL_PID]);
-
- }
- if (a[OVS_VPORT_ATTR_STATS]) {
- vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]);
- }
- if (a[OVS_VPORT_ATTR_OPTIONS]) {
- vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]);
- vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]);
- }
- return 0;
-}
-
-/* Appends to 'buf' (which must initially be empty) a "struct ovs_header"
- * followed by Netlink attributes corresponding to 'vport'. */
-static void
-dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport,
- struct ofpbuf *buf)
-{
- struct ovs_header *ovs_header;
-
- nl_msg_put_genlmsghdr(buf, 0, ovs_vport_family, NLM_F_REQUEST | NLM_F_ECHO,
- vport->cmd, OVS_VPORT_VERSION);
-
- ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header);
- ovs_header->dp_ifindex = vport->dp_ifindex;
-
- if (vport->port_no != ODPP_NONE) {
- nl_msg_put_odp_port(buf, OVS_VPORT_ATTR_PORT_NO, vport->port_no);
- }
-
- if (vport->type != OVS_VPORT_TYPE_UNSPEC) {
- nl_msg_put_u32(buf, OVS_VPORT_ATTR_TYPE, vport->type);
- }
-
- if (vport->name) {
- nl_msg_put_string(buf, OVS_VPORT_ATTR_NAME, vport->name);
- }
-
- if (vport->upcall_pids) {
- nl_msg_put_unspec(buf, OVS_VPORT_ATTR_UPCALL_PID,
- vport->upcall_pids,
- vport->n_upcall_pids * sizeof *vport->upcall_pids);
- }
-
- if (vport->stats) {
- nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS,
- vport->stats, sizeof *vport->stats);
- }
-
- if (vport->options) {
- nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS,
- vport->options, vport->options_len);
- }
-}
-
-/* Clears 'vport' to "empty" values. */
-void
-dpif_linux_vport_init(struct dpif_linux_vport *vport)
-{
- memset(vport, 0, sizeof *vport);
- vport->port_no = ODPP_NONE;
-}
-
-/* Executes 'request' in the kernel datapath. If the command fails, returns a
- * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
- * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
- * result of the command is expected to be an ovs_vport also, which is decoded
- * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
- * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
-int
-dpif_linux_vport_transact(const struct dpif_linux_vport *request,
- struct dpif_linux_vport *reply,
- struct ofpbuf **bufp)
-{
- struct ofpbuf *request_buf;
- int error;
-
- ovs_assert((reply != NULL) == (bufp != NULL));
-
- error = dpif_linux_init();
- if (error) {
- if (reply) {
- *bufp = NULL;
- dpif_linux_vport_init(reply);
- }
- return error;
- }
-
- request_buf = ofpbuf_new(1024);
- dpif_linux_vport_to_ofpbuf(request, request_buf);
- error = nl_transact(NETLINK_GENERIC, request_buf, bufp);
- ofpbuf_delete(request_buf);
-
- if (reply) {
- if (!error) {
- error = dpif_linux_vport_from_ofpbuf(reply, *bufp);
- }
- if (error) {
- dpif_linux_vport_init(reply);
- ofpbuf_delete(*bufp);
- *bufp = NULL;
- }
- }
- return error;
-}
-
-/* Obtains information about the kernel vport named 'name' and stores it into
- * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no
- * longer needed ('reply' will contain pointers into '*bufp'). */
-int
-dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply,
- struct ofpbuf **bufp)
-{
- struct dpif_linux_vport request;
-
- dpif_linux_vport_init(&request);
- request.cmd = OVS_VPORT_CMD_GET;
- request.name = name;
-
- return dpif_linux_vport_transact(&request, reply, bufp);
-}
-\f
-/* Parses the contents of 'buf', which contains a "struct ovs_header" followed
- * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a
- * positive errno value.
- *
- * 'dp' will contain pointers into 'buf', so the caller should not free 'buf'
- * while 'dp' is still in use. */
-static int
-dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *dp, const struct ofpbuf *buf)
-{
- static const struct nl_policy ovs_datapath_policy[] = {
- [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ },
- [OVS_DP_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_dp_stats),
- .optional = true },
- [OVS_DP_ATTR_MEGAFLOW_STATS] = {
- NL_POLICY_FOR(struct ovs_dp_megaflow_stats),
- .optional = true },
- };
-
- struct nlattr *a[ARRAY_SIZE(ovs_datapath_policy)];
- struct ovs_header *ovs_header;
- struct nlmsghdr *nlmsg;
- struct genlmsghdr *genl;
- struct ofpbuf b;
-
- dpif_linux_dp_init(dp);
-
- ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
- nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
- genl = ofpbuf_try_pull(&b, sizeof *genl);
- ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
- if (!nlmsg || !genl || !ovs_header
- || nlmsg->nlmsg_type != ovs_datapath_family
- || !nl_policy_parse(&b, 0, ovs_datapath_policy, a,
- ARRAY_SIZE(ovs_datapath_policy))) {
- return EINVAL;
- }
-
- dp->cmd = genl->cmd;
- dp->dp_ifindex = ovs_header->dp_ifindex;
- dp->name = nl_attr_get_string(a[OVS_DP_ATTR_NAME]);
- if (a[OVS_DP_ATTR_STATS]) {
- dp->stats = nl_attr_get(a[OVS_DP_ATTR_STATS]);
- }
-
- if (a[OVS_DP_ATTR_MEGAFLOW_STATS]) {
- dp->megaflow_stats = nl_attr_get(a[OVS_DP_ATTR_MEGAFLOW_STATS]);
- }
-
- return 0;
-}
-
-/* Appends to 'buf' the Generic Netlink message described by 'dp'. */
-static void
-dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
-{
- struct ovs_header *ovs_header;
-
- nl_msg_put_genlmsghdr(buf, 0, ovs_datapath_family,
- NLM_F_REQUEST | NLM_F_ECHO, dp->cmd,
- OVS_DATAPATH_VERSION);
-
- ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header);
- ovs_header->dp_ifindex = dp->dp_ifindex;
-
- if (dp->name) {
- nl_msg_put_string(buf, OVS_DP_ATTR_NAME, dp->name);
- }
-
- if (dp->upcall_pid) {
- nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid);
- }
-
- if (dp->user_features) {
- nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
- }
-
- /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */
-}
-
-/* Clears 'dp' to "empty" values. */
-static void
-dpif_linux_dp_init(struct dpif_linux_dp *dp)
-{
- memset(dp, 0, sizeof *dp);
-}
-
-static void
-dpif_linux_dp_dump_start(struct nl_dump *dump)
-{
- struct dpif_linux_dp request;
- struct ofpbuf *buf;
-
- dpif_linux_dp_init(&request);
- request.cmd = OVS_DP_CMD_GET;
-
- buf = ofpbuf_new(1024);
- dpif_linux_dp_to_ofpbuf(&request, buf);
- nl_dump_start(dump, NETLINK_GENERIC, buf);
- ofpbuf_delete(buf);
-}
-
-/* Executes 'request' in the kernel datapath. If the command fails, returns a
- * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
- * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
- * result of the command is expected to be of the same form, which is decoded
- * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
- * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
-static int
-dpif_linux_dp_transact(const struct dpif_linux_dp *request,
- struct dpif_linux_dp *reply, struct ofpbuf **bufp)
-{
- struct ofpbuf *request_buf;
- int error;
-
- ovs_assert((reply != NULL) == (bufp != NULL));
-
- request_buf = ofpbuf_new(1024);
- dpif_linux_dp_to_ofpbuf(request, request_buf);
- error = nl_transact(NETLINK_GENERIC, request_buf, bufp);
- ofpbuf_delete(request_buf);
-
- if (reply) {
- dpif_linux_dp_init(reply);
- if (!error) {
- error = dpif_linux_dp_from_ofpbuf(reply, *bufp);
- }
- if (error) {
- ofpbuf_delete(*bufp);
- *bufp = NULL;
- }
- }
- return error;
-}
-
-/* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'.
- * The caller must free '*bufp' when the reply is no longer needed ('reply'
- * will contain pointers into '*bufp'). */
-static int
-dpif_linux_dp_get(const struct dpif *dpif_, struct dpif_linux_dp *reply,
- struct ofpbuf **bufp)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- struct dpif_linux_dp request;
-
- dpif_linux_dp_init(&request);
- request.cmd = OVS_DP_CMD_GET;
- request.dp_ifindex = dpif->dp_ifindex;
-
- return dpif_linux_dp_transact(&request, reply, bufp);
-}
-\f
-/* Parses the contents of 'buf', which contains a "struct ovs_header" followed
- * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a
- * positive errno value.
- *
- * 'flow' will contain pointers into 'buf', so the caller should not free 'buf'
- * while 'flow' is still in use. */
-static int
-dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *flow,
- const struct ofpbuf *buf)
-{
- static const struct nl_policy ovs_flow_policy[] = {
- [OVS_FLOW_ATTR_KEY] = { .type = NL_A_NESTED },
- [OVS_FLOW_ATTR_MASK] = { .type = NL_A_NESTED, .optional = true },
- [OVS_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true },
- [OVS_FLOW_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats),
- .optional = true },
- [OVS_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true },
- [OVS_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true },
- /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */
- };
-
- struct nlattr *a[ARRAY_SIZE(ovs_flow_policy)];
- struct ovs_header *ovs_header;
- struct nlmsghdr *nlmsg;
- struct genlmsghdr *genl;
- struct ofpbuf b;
-
- dpif_linux_flow_init(flow);
-
- ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
- nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
- genl = ofpbuf_try_pull(&b, sizeof *genl);
- ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
- if (!nlmsg || !genl || !ovs_header
- || nlmsg->nlmsg_type != ovs_flow_family
- || !nl_policy_parse(&b, 0, ovs_flow_policy, a,
- ARRAY_SIZE(ovs_flow_policy))) {
- return EINVAL;
- }
-
- flow->nlmsg_flags = nlmsg->nlmsg_flags;
- flow->dp_ifindex = ovs_header->dp_ifindex;
- flow->key = nl_attr_get(a[OVS_FLOW_ATTR_KEY]);
- flow->key_len = nl_attr_get_size(a[OVS_FLOW_ATTR_KEY]);
-
- if (a[OVS_FLOW_ATTR_MASK]) {
- flow->mask = nl_attr_get(a[OVS_FLOW_ATTR_MASK]);
- flow->mask_len = nl_attr_get_size(a[OVS_FLOW_ATTR_MASK]);
- }
- if (a[OVS_FLOW_ATTR_ACTIONS]) {
- flow->actions = nl_attr_get(a[OVS_FLOW_ATTR_ACTIONS]);
- flow->actions_len = nl_attr_get_size(a[OVS_FLOW_ATTR_ACTIONS]);
- }
- if (a[OVS_FLOW_ATTR_STATS]) {
- flow->stats = nl_attr_get(a[OVS_FLOW_ATTR_STATS]);
- }
- if (a[OVS_FLOW_ATTR_TCP_FLAGS]) {
- flow->tcp_flags = nl_attr_get(a[OVS_FLOW_ATTR_TCP_FLAGS]);
- }
- if (a[OVS_FLOW_ATTR_USED]) {
- flow->used = nl_attr_get(a[OVS_FLOW_ATTR_USED]);
- }
- return 0;
-}
-
-/* Appends to 'buf' (which must initially be empty) a "struct ovs_header"
- * followed by Netlink attributes corresponding to 'flow'. */
-static void
-dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow,
- struct ofpbuf *buf)
-{
- struct ovs_header *ovs_header;
-
- nl_msg_put_genlmsghdr(buf, 0, ovs_flow_family,
- NLM_F_REQUEST | flow->nlmsg_flags,
- flow->cmd, OVS_FLOW_VERSION);
-
- ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header);
- ovs_header->dp_ifindex = flow->dp_ifindex;
-
- if (flow->key_len) {
- nl_msg_put_unspec(buf, OVS_FLOW_ATTR_KEY, flow->key, flow->key_len);
- }
-
- if (flow->mask_len) {
- nl_msg_put_unspec(buf, OVS_FLOW_ATTR_MASK, flow->mask, flow->mask_len);
- }
-
- if (flow->actions || flow->actions_len) {
- nl_msg_put_unspec(buf, OVS_FLOW_ATTR_ACTIONS,
- flow->actions, flow->actions_len);
- }
-
- /* We never need to send these to the kernel. */
- ovs_assert(!flow->stats);
- ovs_assert(!flow->tcp_flags);
- ovs_assert(!flow->used);
-
- if (flow->clear) {
- nl_msg_put_flag(buf, OVS_FLOW_ATTR_CLEAR);
- }
-}
-
-/* Clears 'flow' to "empty" values. */
-static void
-dpif_linux_flow_init(struct dpif_linux_flow *flow)
-{
- memset(flow, 0, sizeof *flow);
-}
-
-/* Executes 'request' in the kernel datapath. If the command fails, returns a
- * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
- * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
- * result of the command is expected to be a flow also, which is decoded and
- * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply
- * is no longer needed ('reply' will contain pointers into '*bufp'). */
-static int
-dpif_linux_flow_transact(struct dpif_linux_flow *request,
- struct dpif_linux_flow *reply, struct ofpbuf **bufp)
-{
- struct ofpbuf *request_buf;
- int error;
-
- ovs_assert((reply != NULL) == (bufp != NULL));
-
- if (reply) {
- request->nlmsg_flags |= NLM_F_ECHO;
- }
-
- request_buf = ofpbuf_new(1024);
- dpif_linux_flow_to_ofpbuf(request, request_buf);
- error = nl_transact(NETLINK_GENERIC, request_buf, bufp);
- ofpbuf_delete(request_buf);
-
- if (reply) {
- if (!error) {
- error = dpif_linux_flow_from_ofpbuf(reply, *bufp);
- }
- if (error) {
- dpif_linux_flow_init(reply);
- ofpbuf_delete(*bufp);
- *bufp = NULL;
- }
- }
- return error;
-}
-
-static void
-dpif_linux_flow_get_stats(const struct dpif_linux_flow *flow,
- struct dpif_flow_stats *stats)
-{
- if (flow->stats) {
- stats->n_packets = get_32aligned_u64(&flow->stats->n_packets);
- stats->n_bytes = get_32aligned_u64(&flow->stats->n_bytes);
- } else {
- stats->n_packets = 0;
- stats->n_bytes = 0;
- }
- stats->used = flow->used ? get_32aligned_u64(flow->used) : 0;
- stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0;
-}
-\f
-/* Logs information about a packet that was recently lost in 'ch' (in
- * 'dpif_'). */
-static void
-report_loss(struct dpif_linux *dpif, struct dpif_channel *ch, uint32_t ch_idx,
- uint32_t handler_id)
-{
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
- struct ds s;
-
- if (VLOG_DROP_WARN(&rl)) {
- return;
- }
-
- ds_init(&s);
- if (ch->last_poll != LLONG_MIN) {
- ds_put_format(&s, " (last polled %lld ms ago)",
- time_msec() - ch->last_poll);
- }
-
- VLOG_WARN("%s: lost packet on port channel %u of handler %u",
- dpif_name(&dpif->dpif), ch_idx, handler_id);
- ds_destroy(&s);
-}
+++ /dev/null
-/*
- * Copyright (c) 2010, 2011, 2014 Nicira, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef DPIF_LINUX_H
-#define DPIF_LINUX_H 1
-
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-#include "odp-netlink.h"
-
-#include "flow.h"
-
-struct ofpbuf;
-
-struct dpif_linux_vport {
- /* Generic Netlink header. */
- uint8_t cmd;
-
- /* ovs_vport header. */
- int dp_ifindex;
- odp_port_t port_no; /* ODPP_NONE if unknown. */
- enum ovs_vport_type type;
-
- /* Attributes.
- *
- * The 'stats' member points to 64-bit data that might only be aligned on
- * 32-bit boundaries, so use get_unaligned_u64() to access its values.
- */
- const char *name; /* OVS_VPORT_ATTR_NAME. */
- uint32_t n_upcall_pids;
- const uint32_t *upcall_pids; /* OVS_VPORT_ATTR_UPCALL_PID. */
- const struct ovs_vport_stats *stats; /* OVS_VPORT_ATTR_STATS. */
- const struct nlattr *options; /* OVS_VPORT_ATTR_OPTIONS. */
- size_t options_len;
-};
-
-void dpif_linux_vport_init(struct dpif_linux_vport *);
-
-int dpif_linux_vport_transact(const struct dpif_linux_vport *request,
- struct dpif_linux_vport *reply,
- struct ofpbuf **bufp);
-int dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply,
- struct ofpbuf **bufp);
-
-bool dpif_linux_is_internal_device(const char *name);
-
-#endif /* dpif-linux.h */
--- /dev/null
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include "dpif-netlink.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <net/if.h>
+#include <linux/types.h>
+#include <linux/pkt_sched.h>
+#include <poll.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <sys/epoll.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "bitmap.h"
+#include "dpif-provider.h"
+#include "dynamic-string.h"
+#include "flow.h"
+#include "fat-rwlock.h"
+#include "netdev.h"
+#include "netdev-linux.h"
+#include "netdev-vport.h"
+#include "netlink-notifier.h"
+#include "netlink-socket.h"
+#include "netlink.h"
+#include "odp-util.h"
+#include "ofpbuf.h"
+#include "packets.h"
+#include "poll-loop.h"
+#include "random.h"
+#include "shash.h"
+#include "sset.h"
+#include "timeval.h"
+#include "unaligned.h"
+#include "util.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(dpif_netlink);
+enum { MAX_PORTS = USHRT_MAX };
+
+/* This ethtool flag was introduced in Linux 2.6.24, so it might be
+ * missing if we have old headers. */
+#define ETH_FLAG_LRO (1 << 15) /* LRO is enabled */
+
+struct dpif_netlink_dp {
+ /* Generic Netlink header. */
+ uint8_t cmd;
+
+ /* struct ovs_header. */
+ int dp_ifindex;
+
+ /* Attributes. */
+ const char *name; /* OVS_DP_ATTR_NAME. */
+ const uint32_t *upcall_pid; /* OVS_DP_ATTR_UPCALL_PID. */
+ uint32_t user_features; /* OVS_DP_ATTR_USER_FEATURES */
+ const struct ovs_dp_stats *stats; /* OVS_DP_ATTR_STATS. */
+ const struct ovs_dp_megaflow_stats *megaflow_stats;
+ /* OVS_DP_ATTR_MEGAFLOW_STATS.*/
+};
+
+static void dpif_netlink_dp_init(struct dpif_netlink_dp *);
+static int dpif_netlink_dp_from_ofpbuf(struct dpif_netlink_dp *,
+ const struct ofpbuf *);
+static void dpif_netlink_dp_dump_start(struct nl_dump *);
+static int dpif_netlink_dp_transact(const struct dpif_netlink_dp *request,
+ struct dpif_netlink_dp *reply,
+ struct ofpbuf **bufp);
+static int dpif_netlink_dp_get(const struct dpif *,
+ struct dpif_netlink_dp *reply,
+ struct ofpbuf **bufp);
+
+struct dpif_netlink_flow {
+ /* Generic Netlink header. */
+ uint8_t cmd;
+
+ /* struct ovs_header. */
+ unsigned int nlmsg_flags;
+ int dp_ifindex;
+
+ /* Attributes.
+ *
+ * The 'stats' member points to 64-bit data that might only be aligned on
+ * 32-bit boundaries, so get_unaligned_u64() should be used to access its
+ * values.
+ *
+ * If 'actions' is nonnull then OVS_FLOW_ATTR_ACTIONS will be included in
+ * the Netlink version of the command, even if actions_len is zero. */
+ const struct nlattr *key; /* OVS_FLOW_ATTR_KEY. */
+ size_t key_len;
+ const struct nlattr *mask; /* OVS_FLOW_ATTR_MASK. */
+ size_t mask_len;
+ const struct nlattr *actions; /* OVS_FLOW_ATTR_ACTIONS. */
+ size_t actions_len;
+ const struct ovs_flow_stats *stats; /* OVS_FLOW_ATTR_STATS. */
+ const uint8_t *tcp_flags; /* OVS_FLOW_ATTR_TCP_FLAGS. */
+ const ovs_32aligned_u64 *used; /* OVS_FLOW_ATTR_USED. */
+ bool clear; /* OVS_FLOW_ATTR_CLEAR. */
+};
+
+static void dpif_netlink_flow_init(struct dpif_netlink_flow *);
+static int dpif_netlink_flow_from_ofpbuf(struct dpif_netlink_flow *,
+ const struct ofpbuf *);
+static void dpif_netlink_flow_to_ofpbuf(const struct dpif_netlink_flow *,
+ struct ofpbuf *);
+static int dpif_netlink_flow_transact(struct dpif_netlink_flow *request,
+ struct dpif_netlink_flow *reply,
+ struct ofpbuf **bufp);
+static void dpif_netlink_flow_get_stats(const struct dpif_netlink_flow *,
+ struct dpif_flow_stats *);
+static void dpif_netlink_flow_to_dpif_flow(struct dpif_flow *,
+ const struct dpif_netlink_flow *);
+
+/* One of the dpif channels between the kernel and userspace. */
+struct dpif_channel {
+ struct nl_sock *sock; /* Netlink socket. */
+ long long int last_poll; /* Last time this channel was polled. */
+};
+
+struct dpif_handler {
+ struct dpif_channel *channels;/* Array of channels for each handler. */
+ struct epoll_event *epoll_events;
+ int epoll_fd; /* epoll fd that includes channel socks. */
+ int n_events; /* Num events returned by epoll_wait(). */
+ int event_offset; /* Offset into 'epoll_events'. */
+};
+
+/* Datapath interface for the openvswitch Linux kernel module. */
+struct dpif_netlink {
+ struct dpif dpif;
+ int dp_ifindex;
+
+ /* Upcall messages. */
+ struct fat_rwlock upcall_lock;
+ struct dpif_handler *handlers;
+ uint32_t n_handlers; /* Num of upcall handlers. */
+ int uc_array_size; /* Size of 'handler->channels' and */
+ /* 'handler->epoll_events'. */
+
+ /* Change notification. */
+ struct nl_sock *port_notifier; /* vport multicast group subscriber. */
+ bool refresh_channels;
+};
+
+static void report_loss(struct dpif_netlink *, struct dpif_channel *,
+ uint32_t ch_idx, uint32_t handler_id);
+
+static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5);
+
+/* Generic Netlink family numbers for OVS.
+ *
+ * Initialized by dpif_netlink_init(). */
+static int ovs_datapath_family;
+static int ovs_vport_family;
+static int ovs_flow_family;
+static int ovs_packet_family;
+
+/* Generic Netlink multicast groups for OVS.
+ *
+ * Initialized by dpif_netlink_init(). */
+static unsigned int ovs_vport_mcgroup;
+
+static int dpif_netlink_init(void);
+static int open_dpif(const struct dpif_netlink_dp *, struct dpif **);
+static uint32_t dpif_netlink_port_get_pid(const struct dpif *,
+ odp_port_t port_no, uint32_t hash);
+static int dpif_netlink_refresh_channels(struct dpif_netlink *,
+ uint32_t n_handlers);
+static void dpif_netlink_vport_to_ofpbuf(const struct dpif_netlink_vport *,
+ struct ofpbuf *);
+static int dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *,
+ const struct ofpbuf *);
+
+static struct dpif_netlink *
+dpif_netlink_cast(const struct dpif *dpif)
+{
+ dpif_assert_class(dpif, &dpif_netlink_class);
+ return CONTAINER_OF(dpif, struct dpif_netlink, dpif);
+}
+
+static int
+dpif_netlink_enumerate(struct sset *all_dps,
+ const struct dpif_class *dpif_class OVS_UNUSED)
+{
+ struct nl_dump dump;
+ uint64_t reply_stub[NL_DUMP_BUFSIZE / 8];
+ struct ofpbuf msg, buf;
+ int error;
+
+ error = dpif_netlink_init();
+ if (error) {
+ return error;
+ }
+
+ ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub);
+ dpif_netlink_dp_dump_start(&dump);
+ while (nl_dump_next(&dump, &msg, &buf)) {
+ struct dpif_netlink_dp dp;
+
+ if (!dpif_netlink_dp_from_ofpbuf(&dp, &msg)) {
+ sset_add(all_dps, dp.name);
+ }
+ }
+ ofpbuf_uninit(&buf);
+ return nl_dump_done(&dump);
+}
+
+static int
+dpif_netlink_open(const struct dpif_class *class OVS_UNUSED, const char *name,
+ bool create, struct dpif **dpifp)
+{
+ struct dpif_netlink_dp dp_request, dp;
+ struct ofpbuf *buf;
+ uint32_t upcall_pid;
+ int error;
+
+ error = dpif_netlink_init();
+ if (error) {
+ return error;
+ }
+
+ /* Create or look up datapath. */
+ dpif_netlink_dp_init(&dp_request);
+ if (create) {
+ dp_request.cmd = OVS_DP_CMD_NEW;
+ upcall_pid = 0;
+ dp_request.upcall_pid = &upcall_pid;
+ } else {
+ /* Use OVS_DP_CMD_SET to report user features */
+ dp_request.cmd = OVS_DP_CMD_SET;
+ }
+ dp_request.name = name;
+ dp_request.user_features |= OVS_DP_F_UNALIGNED;
+ dp_request.user_features |= OVS_DP_F_VPORT_PIDS;
+ error = dpif_netlink_dp_transact(&dp_request, &dp, &buf);
+ if (error) {
+ return error;
+ }
+
+ error = open_dpif(&dp, dpifp);
+ ofpbuf_delete(buf);
+ return error;
+}
+
+static int
+open_dpif(const struct dpif_netlink_dp *dp, struct dpif **dpifp)
+{
+ struct dpif_netlink *dpif;
+
+ dpif = xzalloc(sizeof *dpif);
+ dpif->port_notifier = NULL;
+ fat_rwlock_init(&dpif->upcall_lock);
+
+ dpif_init(&dpif->dpif, &dpif_netlink_class, dp->name,
+ dp->dp_ifindex, dp->dp_ifindex);
+
+ dpif->dp_ifindex = dp->dp_ifindex;
+ *dpifp = &dpif->dpif;
+
+ return 0;
+}
+
+/* Destroys the netlink sockets pointed by the elements in 'socksp'
+ * and frees the 'socksp'. */
+static void
+vport_del_socksp(struct nl_sock **socksp, uint32_t n_socks)
+{
+ size_t i;
+
+ for (i = 0; i < n_socks; i++) {
+ nl_sock_destroy(socksp[i]);
+ }
+
+ free(socksp);
+}
+
+/* Creates an array of netlink sockets. Returns an array of the
+ * corresponding pointers. Records the error in 'error'. */
+static struct nl_sock **
+vport_create_socksp(uint32_t n_socks, int *error)
+{
+ struct nl_sock **socksp = xzalloc(n_socks * sizeof *socksp);
+ size_t i;
+
+ for (i = 0; i < n_socks; i++) {
+ *error = nl_sock_create(NETLINK_GENERIC, &socksp[i]);
+ if (*error) {
+ goto error;
+ }
+ }
+
+ return socksp;
+
+error:
+ vport_del_socksp(socksp, n_socks);
+
+ return NULL;
+}
+
+/* Given the array of pointers to netlink sockets 'socksp', returns
+ * the array of corresponding pids. If the 'socksp' is NULL, returns
+ * a single-element array of value 0. */
+static uint32_t *
+vport_socksp_to_pids(struct nl_sock **socksp, uint32_t n_socks)
+{
+ uint32_t *pids;
+
+ if (!socksp) {
+ pids = xzalloc(sizeof *pids);
+ } else {
+ size_t i;
+
+ pids = xzalloc(n_socks * sizeof *pids);
+ for (i = 0; i < n_socks; i++) {
+ pids[i] = nl_sock_pid(socksp[i]);
+ }
+ }
+
+ return pids;
+}
+
+/* Given the port number 'port_idx', extracts the pids of netlink sockets
+ * associated to the port and assigns it to 'upcall_pids'. */
+static bool
+vport_get_pids(struct dpif_netlink *dpif, uint32_t port_idx,
+ uint32_t **upcall_pids)
+{
+ uint32_t *pids;
+ size_t i;
+
+ /* Since the nl_sock can only be assigned in either all
+ * or none "dpif->handlers" channels, the following check
+ * would suffice. */
+ if (!dpif->handlers[0].channels[port_idx].sock) {
+ return false;
+ }
+
+ pids = xzalloc(dpif->n_handlers * sizeof *pids);
+
+ for (i = 0; i < dpif->n_handlers; i++) {
+ pids[i] = nl_sock_pid(dpif->handlers[i].channels[port_idx].sock);
+ }
+
+ *upcall_pids = pids;
+
+ return true;
+}
+
+static int
+vport_add_channels(struct dpif_netlink *dpif, odp_port_t port_no,
+ struct nl_sock **socksp)
+{
+ struct epoll_event event;
+ uint32_t port_idx = odp_to_u32(port_no);
+ size_t i, j;
+ int error;
+
+ if (dpif->handlers == NULL) {
+ return 0;
+ }
+
+ /* We assume that the datapath densely chooses port numbers, which can
+ * therefore be used as an index into 'channels' and 'epoll_events' of
+ * 'dpif->handler'. */
+ if (port_idx >= dpif->uc_array_size) {
+ uint32_t new_size = port_idx + 1;
+
+ if (new_size > MAX_PORTS) {
+ VLOG_WARN_RL(&error_rl, "%s: datapath port %"PRIu32" too big",
+ dpif_name(&dpif->dpif), port_no);
+ return EFBIG;
+ }
+
+ for (i = 0; i < dpif->n_handlers; i++) {
+ struct dpif_handler *handler = &dpif->handlers[i];
+
+ handler->channels = xrealloc(handler->channels,
+ new_size * sizeof *handler->channels);
+
+ for (j = dpif->uc_array_size; j < new_size; j++) {
+ handler->channels[j].sock = NULL;
+ }
+
+ handler->epoll_events = xrealloc(handler->epoll_events,
+ new_size * sizeof *handler->epoll_events);
+
+ }
+ dpif->uc_array_size = new_size;
+ }
+
+ memset(&event, 0, sizeof event);
+ event.events = EPOLLIN;
+ event.data.u32 = port_idx;
+
+ for (i = 0; i < dpif->n_handlers; i++) {
+ struct dpif_handler *handler = &dpif->handlers[i];
+
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ if (epoll_ctl(handler->epoll_fd, EPOLL_CTL_ADD, nl_sock_fd(socksp[i]),
+ &event) < 0) {
+ error = errno;
+ goto error;
+ }
+#endif
+ dpif->handlers[i].channels[port_idx].sock = socksp[i];
+ dpif->handlers[i].channels[port_idx].last_poll = LLONG_MIN;
+ }
+
+ return 0;
+
+error:
+ for (j = 0; j < i; j++) {
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ epoll_ctl(dpif->handlers[j].epoll_fd, EPOLL_CTL_DEL,
+ nl_sock_fd(socksp[j]), NULL);
+#endif
+ dpif->handlers[j].channels[port_idx].sock = NULL;
+ }
+
+ return error;
+}
+
+static void
+vport_del_channels(struct dpif_netlink *dpif, odp_port_t port_no)
+{
+ uint32_t port_idx = odp_to_u32(port_no);
+ size_t i;
+
+ if (!dpif->handlers || port_idx >= dpif->uc_array_size) {
+ return;
+ }
+
+ /* Since the sock can only be assigned in either all or none
+ * of "dpif->handlers" channels, the following check would
+ * suffice. */
+ if (!dpif->handlers[0].channels[port_idx].sock) {
+ return;
+ }
+
+ for (i = 0; i < dpif->n_handlers; i++) {
+ struct dpif_handler *handler = &dpif->handlers[i];
+
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ epoll_ctl(handler->epoll_fd, EPOLL_CTL_DEL,
+ nl_sock_fd(handler->channels[port_idx].sock), NULL);
+#endif
+ nl_sock_destroy(handler->channels[port_idx].sock);
+ handler->channels[port_idx].sock = NULL;
+ handler->event_offset = handler->n_events = 0;
+ }
+}
+
+static void
+destroy_all_channels(struct dpif_netlink *dpif)
+ OVS_REQ_WRLOCK(dpif->upcall_lock)
+{
+ unsigned int i;
+
+ if (!dpif->handlers) {
+ return;
+ }
+
+ for (i = 0; i < dpif->uc_array_size; i++ ) {
+ struct dpif_netlink_vport vport_request;
+ uint32_t upcall_pids = 0;
+
+ /* Since the sock can only be assigned in either all or none
+ * of "dpif->handlers" channels, the following check would
+ * suffice. */
+ if (!dpif->handlers[0].channels[i].sock) {
+ continue;
+ }
+
+ /* Turn off upcalls. */
+ dpif_netlink_vport_init(&vport_request);
+ vport_request.cmd = OVS_VPORT_CMD_SET;
+ vport_request.dp_ifindex = dpif->dp_ifindex;
+ vport_request.port_no = u32_to_odp(i);
+ vport_request.upcall_pids = &upcall_pids;
+ dpif_netlink_vport_transact(&vport_request, NULL, NULL);
+
+ vport_del_channels(dpif, u32_to_odp(i));
+ }
+
+ for (i = 0; i < dpif->n_handlers; i++) {
+ struct dpif_handler *handler = &dpif->handlers[i];
+
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ close(handler->epoll_fd);
+#endif
+ free(handler->epoll_events);
+ free(handler->channels);
+ }
+
+ free(dpif->handlers);
+ dpif->handlers = NULL;
+ dpif->n_handlers = 0;
+ dpif->uc_array_size = 0;
+}
+
+static void
+dpif_netlink_close(struct dpif *dpif_)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ nl_sock_destroy(dpif->port_notifier);
+
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ destroy_all_channels(dpif);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ fat_rwlock_destroy(&dpif->upcall_lock);
+ free(dpif);
+}
+
+static int
+dpif_netlink_destroy(struct dpif *dpif_)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ struct dpif_netlink_dp dp;
+
+ dpif_netlink_dp_init(&dp);
+ dp.cmd = OVS_DP_CMD_DEL;
+ dp.dp_ifindex = dpif->dp_ifindex;
+ return dpif_netlink_dp_transact(&dp, NULL, NULL);
+}
+
+static void
+dpif_netlink_run(struct dpif *dpif_)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ if (dpif->refresh_channels) {
+ dpif->refresh_channels = false;
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ dpif_netlink_refresh_channels(dpif, dpif->n_handlers);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+ }
+}
+
+static int
+dpif_netlink_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats)
+{
+ struct dpif_netlink_dp dp;
+ struct ofpbuf *buf;
+ int error;
+
+ error = dpif_netlink_dp_get(dpif_, &dp, &buf);
+ if (!error) {
+ memset(stats, 0, sizeof *stats);
+
+ if (dp.stats) {
+ stats->n_hit = get_32aligned_u64(&dp.stats->n_hit);
+ stats->n_missed = get_32aligned_u64(&dp.stats->n_missed);
+ stats->n_lost = get_32aligned_u64(&dp.stats->n_lost);
+ stats->n_flows = get_32aligned_u64(&dp.stats->n_flows);
+ }
+
+ if (dp.megaflow_stats) {
+ stats->n_masks = dp.megaflow_stats->n_masks;
+ stats->n_mask_hit = get_32aligned_u64(
+ &dp.megaflow_stats->n_mask_hit);
+ } else {
+ stats->n_masks = UINT32_MAX;
+ stats->n_mask_hit = UINT64_MAX;
+ }
+ ofpbuf_delete(buf);
+ }
+ return error;
+}
+
+static const char *
+get_vport_type(const struct dpif_netlink_vport *vport)
+{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
+
+ switch (vport->type) {
+ case OVS_VPORT_TYPE_NETDEV: {
+ const char *type = netdev_get_type_from_name(vport->name);
+
+ return type ? type : "system";
+ }
+
+ case OVS_VPORT_TYPE_INTERNAL:
+ return "internal";
+
+ case OVS_VPORT_TYPE_GENEVE:
+ return "geneve";
+
+ case OVS_VPORT_TYPE_GRE:
+ return "gre";
+
+ case OVS_VPORT_TYPE_GRE64:
+ return "gre64";
+
+ case OVS_VPORT_TYPE_VXLAN:
+ return "vxlan";
+
+ case OVS_VPORT_TYPE_LISP:
+ return "lisp";
+
+ case OVS_VPORT_TYPE_UNSPEC:
+ case __OVS_VPORT_TYPE_MAX:
+ break;
+ }
+
+ VLOG_WARN_RL(&rl, "dp%d: port `%s' has unsupported type %u",
+ vport->dp_ifindex, vport->name, (unsigned int) vport->type);
+ return "unknown";
+}
+
+static enum ovs_vport_type
+netdev_to_ovs_vport_type(const struct netdev *netdev)
+{
+ const char *type = netdev_get_type(netdev);
+
+ if (!strcmp(type, "tap") || !strcmp(type, "system")) {
+ return OVS_VPORT_TYPE_NETDEV;
+ } else if (!strcmp(type, "internal")) {
+ return OVS_VPORT_TYPE_INTERNAL;
+ } else if (!strcmp(type, "geneve")) {
+ return OVS_VPORT_TYPE_GENEVE;
+ } else if (strstr(type, "gre64")) {
+ return OVS_VPORT_TYPE_GRE64;
+ } else if (strstr(type, "gre")) {
+ return OVS_VPORT_TYPE_GRE;
+ } else if (!strcmp(type, "vxlan")) {
+ return OVS_VPORT_TYPE_VXLAN;
+ } else if (!strcmp(type, "lisp")) {
+ return OVS_VPORT_TYPE_LISP;
+ } else {
+ return OVS_VPORT_TYPE_UNSPEC;
+ }
+}
+
+static int
+dpif_netlink_port_add__(struct dpif_netlink *dpif, struct netdev *netdev,
+ odp_port_t *port_nop)
+ OVS_REQ_WRLOCK(dpif->upcall_lock)
+{
+ const struct netdev_tunnel_config *tnl_cfg;
+ char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
+ const char *name = netdev_vport_get_dpif_port(netdev,
+ namebuf, sizeof namebuf);
+ const char *type = netdev_get_type(netdev);
+ struct dpif_netlink_vport request, reply;
+ struct ofpbuf *buf;
+ uint64_t options_stub[64 / 8];
+ struct ofpbuf options;
+ struct nl_sock **socksp = NULL;
+ uint32_t *upcall_pids;
+ int error = 0;
+
+ if (dpif->handlers) {
+ socksp = vport_create_socksp(dpif->n_handlers, &error);
+ if (!socksp) {
+ return error;
+ }
+ }
+
+ dpif_netlink_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_NEW;
+ request.dp_ifindex = dpif->dp_ifindex;
+ request.type = netdev_to_ovs_vport_type(netdev);
+ if (request.type == OVS_VPORT_TYPE_UNSPEC) {
+ VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has "
+ "unsupported type `%s'",
+ dpif_name(&dpif->dpif), name, type);
+ vport_del_socksp(socksp, dpif->n_handlers);
+ return EINVAL;
+ }
+ request.name = name;
+
+ if (request.type == OVS_VPORT_TYPE_NETDEV) {
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false);
+#endif
+ }
+
+ tnl_cfg = netdev_get_tunnel_config(netdev);
+ if (tnl_cfg && tnl_cfg->dst_port != 0) {
+ ofpbuf_use_stack(&options, options_stub, sizeof options_stub);
+ nl_msg_put_u16(&options, OVS_TUNNEL_ATTR_DST_PORT,
+ ntohs(tnl_cfg->dst_port));
+ request.options = ofpbuf_data(&options);
+ request.options_len = ofpbuf_size(&options);
+ }
+
+ request.port_no = *port_nop;
+ upcall_pids = vport_socksp_to_pids(socksp, dpif->n_handlers);
+ request.n_upcall_pids = socksp ? dpif->n_handlers : 1;
+ request.upcall_pids = upcall_pids;
+
+ error = dpif_netlink_vport_transact(&request, &reply, &buf);
+ if (!error) {
+ *port_nop = reply.port_no;
+ } else {
+ if (error == EBUSY && *port_nop != ODPP_NONE) {
+ VLOG_INFO("%s: requested port %"PRIu32" is in use",
+ dpif_name(&dpif->dpif), *port_nop);
+ }
+
+ vport_del_socksp(socksp, dpif->n_handlers);
+ goto exit;
+ }
+
+ if (socksp) {
+ error = vport_add_channels(dpif, *port_nop, socksp);
+ if (error) {
+ VLOG_INFO("%s: could not add channel for port %s",
+ dpif_name(&dpif->dpif), name);
+
+ /* Delete the port. */
+ dpif_netlink_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_DEL;
+ request.dp_ifindex = dpif->dp_ifindex;
+ request.port_no = *port_nop;
+ dpif_netlink_vport_transact(&request, NULL, NULL);
+ vport_del_socksp(socksp, dpif->n_handlers);
+ goto exit;
+ }
+ }
+ free(socksp);
+
+exit:
+ ofpbuf_delete(buf);
+ free(upcall_pids);
+
+ return error;
+}
+
+static int
+dpif_netlink_port_add(struct dpif *dpif_, struct netdev *netdev,
+ odp_port_t *port_nop)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ int error;
+
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ error = dpif_netlink_port_add__(dpif, netdev, port_nop);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ return error;
+}
+
+static int
+dpif_netlink_port_del__(struct dpif_netlink *dpif, odp_port_t port_no)
+ OVS_REQ_WRLOCK(dpif->upcall_lock)
+{
+ struct dpif_netlink_vport vport;
+ int error;
+
+ dpif_netlink_vport_init(&vport);
+ vport.cmd = OVS_VPORT_CMD_DEL;
+ vport.dp_ifindex = dpif->dp_ifindex;
+ vport.port_no = port_no;
+ error = dpif_netlink_vport_transact(&vport, NULL, NULL);
+
+ vport_del_channels(dpif, port_no);
+
+ return error;
+}
+
+static int
+dpif_netlink_port_del(struct dpif *dpif_, odp_port_t port_no)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ int error;
+
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ error = dpif_netlink_port_del__(dpif, port_no);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ return error;
+}
+
+static int
+dpif_netlink_port_query__(const struct dpif_netlink *dpif, odp_port_t port_no,
+ const char *port_name, struct dpif_port *dpif_port)
+{
+ struct dpif_netlink_vport request;
+ struct dpif_netlink_vport reply;
+ struct ofpbuf *buf;
+ int error;
+
+ dpif_netlink_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_GET;
+ request.dp_ifindex = dpif->dp_ifindex;
+ request.port_no = port_no;
+ request.name = port_name;
+
+ error = dpif_netlink_vport_transact(&request, &reply, &buf);
+ if (!error) {
+ if (reply.dp_ifindex != request.dp_ifindex) {
+ /* A query by name reported that 'port_name' is in some datapath
+ * other than 'dpif', but the caller wants to know about 'dpif'. */
+ error = ENODEV;
+ } else if (dpif_port) {
+ dpif_port->name = xstrdup(reply.name);
+ dpif_port->type = xstrdup(get_vport_type(&reply));
+ dpif_port->port_no = reply.port_no;
+ }
+ ofpbuf_delete(buf);
+ }
+ return error;
+}
+
+static int
+dpif_netlink_port_query_by_number(const struct dpif *dpif_, odp_port_t port_no,
+ struct dpif_port *dpif_port)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ return dpif_netlink_port_query__(dpif, port_no, NULL, dpif_port);
+}
+
+static int
+dpif_netlink_port_query_by_name(const struct dpif *dpif_, const char *devname,
+ struct dpif_port *dpif_port)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ return dpif_netlink_port_query__(dpif, 0, devname, dpif_port);
+}
+
+static uint32_t
+dpif_netlink_port_get_pid__(const struct dpif_netlink *dpif,
+ odp_port_t port_no, uint32_t hash)
+ OVS_REQ_RDLOCK(dpif->upcall_lock)
+{
+ uint32_t port_idx = odp_to_u32(port_no);
+ uint32_t pid = 0;
+
+ if (dpif->handlers && dpif->uc_array_size > 0) {
+ /* The ODPP_NONE "reserved" port number uses the "ovs-system"'s
+ * channel, since it is not heavily loaded. */
+ uint32_t idx = port_idx >= dpif->uc_array_size ? 0 : port_idx;
+ struct dpif_handler *h = &dpif->handlers[hash % dpif->n_handlers];
+
+ /* Needs to check in case the socket pointer is changed in between
+ * the holding of upcall_lock. A known case happens when the main
+ * thread deletes the vport while the handler thread is handling
+ * the upcall from that port. */
+ if (h->channels[idx].sock) {
+ pid = nl_sock_pid(h->channels[idx].sock);
+ }
+ }
+
+ return pid;
+}
+
+static uint32_t
+dpif_netlink_port_get_pid(const struct dpif *dpif_, odp_port_t port_no,
+ uint32_t hash)
+{
+ const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ uint32_t ret;
+
+ fat_rwlock_rdlock(&dpif->upcall_lock);
+ ret = dpif_netlink_port_get_pid__(dpif, port_no, hash);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ return ret;
+}
+
+static int
+dpif_netlink_flow_flush(struct dpif *dpif_)
+{
+ const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ struct dpif_netlink_flow flow;
+
+ dpif_netlink_flow_init(&flow);
+ flow.cmd = OVS_FLOW_CMD_DEL;
+ flow.dp_ifindex = dpif->dp_ifindex;
+ return dpif_netlink_flow_transact(&flow, NULL, NULL);
+}
+
+struct dpif_netlink_port_state {
+ struct nl_dump dump;
+ struct ofpbuf buf;
+};
+
+static void
+dpif_netlink_port_dump_start__(const struct dpif_netlink *dpif,
+ struct nl_dump *dump)
+{
+ struct dpif_netlink_vport request;
+ struct ofpbuf *buf;
+
+ dpif_netlink_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_GET;
+ request.dp_ifindex = dpif->dp_ifindex;
+
+ buf = ofpbuf_new(1024);
+ dpif_netlink_vport_to_ofpbuf(&request, buf);
+ nl_dump_start(dump, NETLINK_GENERIC, buf);
+ ofpbuf_delete(buf);
+}
+
+static int
+dpif_netlink_port_dump_start(const struct dpif *dpif_, void **statep)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ struct dpif_netlink_port_state *state;
+
+ *statep = state = xmalloc(sizeof *state);
+ dpif_netlink_port_dump_start__(dpif, &state->dump);
+
+ ofpbuf_init(&state->buf, NL_DUMP_BUFSIZE);
+ return 0;
+}
+
+static int
+dpif_netlink_port_dump_next__(const struct dpif_netlink *dpif,
+ struct nl_dump *dump,
+ struct dpif_netlink_vport *vport,
+ struct ofpbuf *buffer)
+{
+ struct ofpbuf buf;
+ int error;
+
+ if (!nl_dump_next(dump, &buf, buffer)) {
+ return EOF;
+ }
+
+ error = dpif_netlink_vport_from_ofpbuf(vport, &buf);
+ if (error) {
+ VLOG_WARN_RL(&error_rl, "%s: failed to parse vport record (%s)",
+ dpif_name(&dpif->dpif), ovs_strerror(error));
+ }
+ return error;
+}
+
+static int
+dpif_netlink_port_dump_next(const struct dpif *dpif_, void *state_,
+ struct dpif_port *dpif_port)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ struct dpif_netlink_port_state *state = state_;
+ struct dpif_netlink_vport vport;
+ int error;
+
+ error = dpif_netlink_port_dump_next__(dpif, &state->dump, &vport,
+ &state->buf);
+ if (error) {
+ return error;
+ }
+ dpif_port->name = CONST_CAST(char *, vport.name);
+ dpif_port->type = CONST_CAST(char *, get_vport_type(&vport));
+ dpif_port->port_no = vport.port_no;
+ return 0;
+}
+
+static int
+dpif_netlink_port_dump_done(const struct dpif *dpif_ OVS_UNUSED, void *state_)
+{
+ struct dpif_netlink_port_state *state = state_;
+ int error = nl_dump_done(&state->dump);
+
+ ofpbuf_uninit(&state->buf);
+ free(state);
+ return error;
+}
+
+static int
+dpif_netlink_port_poll(const struct dpif *dpif_, char **devnamep)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ /* Lazily create the Netlink socket to listen for notifications. */
+ if (!dpif->port_notifier) {
+ struct nl_sock *sock;
+ int error;
+
+ error = nl_sock_create(NETLINK_GENERIC, &sock);
+ if (error) {
+ return error;
+ }
+
+ error = nl_sock_join_mcgroup(sock, ovs_vport_mcgroup);
+ if (error) {
+ nl_sock_destroy(sock);
+ return error;
+ }
+ dpif->port_notifier = sock;
+
+ /* We have no idea of the current state so report that everything
+ * changed. */
+ return ENOBUFS;
+ }
+
+ for (;;) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ uint64_t buf_stub[4096 / 8];
+ struct ofpbuf buf;
+ int error;
+
+ ofpbuf_use_stub(&buf, buf_stub, sizeof buf_stub);
+ error = nl_sock_recv(dpif->port_notifier, &buf, false);
+ if (!error) {
+ struct dpif_netlink_vport vport;
+
+ error = dpif_netlink_vport_from_ofpbuf(&vport, &buf);
+ if (!error) {
+ if (vport.dp_ifindex == dpif->dp_ifindex
+ && (vport.cmd == OVS_VPORT_CMD_NEW
+ || vport.cmd == OVS_VPORT_CMD_DEL
+ || vport.cmd == OVS_VPORT_CMD_SET)) {
+ VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8,
+ dpif->dpif.full_name, vport.name, vport.cmd);
+ if (vport.cmd == OVS_VPORT_CMD_DEL && dpif->handlers) {
+ dpif->refresh_channels = true;
+ }
+ *devnamep = xstrdup(vport.name);
+ ofpbuf_uninit(&buf);
+ return 0;
+ }
+ }
+ } else if (error != EAGAIN) {
+ VLOG_WARN_RL(&rl, "error reading or parsing netlink (%s)",
+ ovs_strerror(error));
+ nl_sock_drain(dpif->port_notifier);
+ error = ENOBUFS;
+ }
+
+ ofpbuf_uninit(&buf);
+ if (error) {
+ return error;
+ }
+ }
+}
+
+static void
+dpif_netlink_port_poll_wait(const struct dpif *dpif_)
+{
+ const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ if (dpif->port_notifier) {
+ nl_sock_wait(dpif->port_notifier, POLLIN);
+ } else {
+ poll_immediate_wake();
+ }
+}
+
+static void
+dpif_netlink_init_flow_get(const struct dpif_netlink *dpif,
+ const struct nlattr *key, size_t key_len,
+ struct dpif_netlink_flow *request)
+{
+ dpif_netlink_flow_init(request);
+ request->cmd = OVS_FLOW_CMD_GET;
+ request->dp_ifindex = dpif->dp_ifindex;
+ request->key = key;
+ request->key_len = key_len;
+}
+
+static int
+dpif_netlink_flow_get(const struct dpif_netlink *dpif,
+ const struct nlattr *key, size_t key_len,
+ struct dpif_netlink_flow *reply, struct ofpbuf **bufp)
+{
+ struct dpif_netlink_flow request;
+
+ dpif_netlink_init_flow_get(dpif, key, key_len, &request);
+ return dpif_netlink_flow_transact(&request, reply, bufp);
+}
+
+static void
+dpif_netlink_init_flow_put(struct dpif_netlink *dpif,
+ const struct dpif_flow_put *put,
+ struct dpif_netlink_flow *request)
+{
+ static const struct nlattr dummy_action;
+
+ dpif_netlink_flow_init(request);
+ request->cmd = (put->flags & DPIF_FP_CREATE
+ ? OVS_FLOW_CMD_NEW : OVS_FLOW_CMD_SET);
+ request->dp_ifindex = dpif->dp_ifindex;
+ request->key = put->key;
+ request->key_len = put->key_len;
+ request->mask = put->mask;
+ request->mask_len = put->mask_len;
+ /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */
+ request->actions = (put->actions
+ ? put->actions
+ : CONST_CAST(struct nlattr *, &dummy_action));
+ request->actions_len = put->actions_len;
+ if (put->flags & DPIF_FP_ZERO_STATS) {
+ request->clear = true;
+ }
+ request->nlmsg_flags = put->flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE;
+}
+
+static void
+dpif_netlink_init_flow_del(struct dpif_netlink *dpif,
+ const struct dpif_flow_del *del,
+ struct dpif_netlink_flow *request)
+{
+ dpif_netlink_flow_init(request);
+ request->cmd = OVS_FLOW_CMD_DEL;
+ request->dp_ifindex = dpif->dp_ifindex;
+ request->key = del->key;
+ request->key_len = del->key_len;
+}
+
+struct dpif_netlink_flow_dump {
+ struct dpif_flow_dump up;
+ struct nl_dump nl_dump;
+ atomic_int status;
+};
+
+static struct dpif_netlink_flow_dump *
+dpif_netlink_flow_dump_cast(struct dpif_flow_dump *dump)
+{
+ return CONTAINER_OF(dump, struct dpif_netlink_flow_dump, up);
+}
+
+static struct dpif_flow_dump *
+dpif_netlink_flow_dump_create(const struct dpif *dpif_)
+{
+ const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ struct dpif_netlink_flow_dump *dump;
+ struct dpif_netlink_flow request;
+ struct ofpbuf *buf;
+
+ dump = xmalloc(sizeof *dump);
+ dpif_flow_dump_init(&dump->up, dpif_);
+
+ dpif_netlink_flow_init(&request);
+ request.cmd = OVS_FLOW_CMD_GET;
+ request.dp_ifindex = dpif->dp_ifindex;
+
+ buf = ofpbuf_new(1024);
+ dpif_netlink_flow_to_ofpbuf(&request, buf);
+ nl_dump_start(&dump->nl_dump, NETLINK_GENERIC, buf);
+ ofpbuf_delete(buf);
+ atomic_init(&dump->status, 0);
+
+ return &dump->up;
+}
+
+static int
+dpif_netlink_flow_dump_destroy(struct dpif_flow_dump *dump_)
+{
+ struct dpif_netlink_flow_dump *dump = dpif_netlink_flow_dump_cast(dump_);
+ unsigned int nl_status = nl_dump_done(&dump->nl_dump);
+ int dump_status;
+
+ /* No other thread has access to 'dump' at this point. */
+ atomic_read_relaxed(&dump->status, &dump_status);
+ free(dump);
+ return dump_status ? dump_status : nl_status;
+}
+
+struct dpif_netlink_flow_dump_thread {
+ struct dpif_flow_dump_thread up;
+ struct dpif_netlink_flow_dump *dump;
+ struct dpif_netlink_flow flow;
+ struct dpif_flow_stats stats;
+ struct ofpbuf nl_flows; /* Always used to store flows. */
+ struct ofpbuf *nl_actions; /* Used if kernel does not supply actions. */
+};
+
+static struct dpif_netlink_flow_dump_thread *
+dpif_netlink_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
+{
+ return CONTAINER_OF(thread, struct dpif_netlink_flow_dump_thread, up);
+}
+
+static struct dpif_flow_dump_thread *
+dpif_netlink_flow_dump_thread_create(struct dpif_flow_dump *dump_)
+{
+ struct dpif_netlink_flow_dump *dump = dpif_netlink_flow_dump_cast(dump_);
+ struct dpif_netlink_flow_dump_thread *thread;
+
+ thread = xmalloc(sizeof *thread);
+ dpif_flow_dump_thread_init(&thread->up, &dump->up);
+ thread->dump = dump;
+ ofpbuf_init(&thread->nl_flows, NL_DUMP_BUFSIZE);
+ thread->nl_actions = NULL;
+
+ return &thread->up;
+}
+
+static void
+dpif_netlink_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
+{
+ struct dpif_netlink_flow_dump_thread *thread
+ = dpif_netlink_flow_dump_thread_cast(thread_);
+
+ ofpbuf_uninit(&thread->nl_flows);
+ ofpbuf_delete(thread->nl_actions);
+ free(thread);
+}
+
+static void
+dpif_netlink_flow_to_dpif_flow(struct dpif_flow *dpif_flow,
+ const struct dpif_netlink_flow *linux_flow)
+{
+ dpif_flow->key = linux_flow->key;
+ dpif_flow->key_len = linux_flow->key_len;
+ dpif_flow->mask = linux_flow->mask;
+ dpif_flow->mask_len = linux_flow->mask_len;
+ dpif_flow->actions = linux_flow->actions;
+ dpif_flow->actions_len = linux_flow->actions_len;
+ dpif_netlink_flow_get_stats(linux_flow, &dpif_flow->stats);
+}
+
+static int
+dpif_netlink_flow_dump_next(struct dpif_flow_dump_thread *thread_,
+ struct dpif_flow *flows, int max_flows)
+{
+ struct dpif_netlink_flow_dump_thread *thread
+ = dpif_netlink_flow_dump_thread_cast(thread_);
+ struct dpif_netlink_flow_dump *dump = thread->dump;
+ struct dpif_netlink *dpif = dpif_netlink_cast(thread->up.dpif);
+ int n_flows;
+
+ ofpbuf_delete(thread->nl_actions);
+ thread->nl_actions = NULL;
+
+ n_flows = 0;
+ while (!n_flows
+ || (n_flows < max_flows && ofpbuf_size(&thread->nl_flows))) {
+ struct dpif_netlink_flow linux_flow;
+ struct ofpbuf nl_flow;
+ int error;
+
+ /* Try to grab another flow. */
+ if (!nl_dump_next(&dump->nl_dump, &nl_flow, &thread->nl_flows)) {
+ break;
+ }
+
+ /* Convert the flow to our output format. */
+ error = dpif_netlink_flow_from_ofpbuf(&linux_flow, &nl_flow);
+ if (error) {
+ atomic_store_relaxed(&dump->status, error);
+ break;
+ }
+
+ if (linux_flow.actions) {
+ /* Common case: the flow includes actions. */
+ dpif_netlink_flow_to_dpif_flow(&flows[n_flows++], &linux_flow);
+ } else {
+ /* Rare case: the flow does not include actions. Retrieve this
+ * individual flow again to get the actions. */
+ error = dpif_netlink_flow_get(dpif, linux_flow.key,
+ linux_flow.key_len, &linux_flow,
+ &thread->nl_actions);
+ if (error == ENOENT) {
+ VLOG_DBG("dumped flow disappeared on get");
+ continue;
+ } else if (error) {
+ VLOG_WARN("error fetching dumped flow: %s",
+ ovs_strerror(error));
+ atomic_store_relaxed(&dump->status, error);
+ break;
+ }
+
+ /* Save this flow. Then exit, because we only have one buffer to
+ * handle this case. */
+ dpif_netlink_flow_to_dpif_flow(&flows[n_flows++], &linux_flow);
+ break;
+ }
+ }
+ return n_flows;
+}
+
+static void
+dpif_netlink_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec,
+ struct ofpbuf *buf)
+{
+ struct ovs_header *k_exec;
+ size_t key_ofs;
+
+ ofpbuf_prealloc_tailroom(buf, (64
+ + ofpbuf_size(d_exec->packet)
+ + ODP_KEY_METADATA_SIZE
+ + d_exec->actions_len));
+
+ nl_msg_put_genlmsghdr(buf, 0, ovs_packet_family, NLM_F_REQUEST,
+ OVS_PACKET_CMD_EXECUTE, OVS_PACKET_VERSION);
+
+ k_exec = ofpbuf_put_uninit(buf, sizeof *k_exec);
+ k_exec->dp_ifindex = dp_ifindex;
+
+ nl_msg_put_unspec(buf, OVS_PACKET_ATTR_PACKET,
+ ofpbuf_data(d_exec->packet),
+ ofpbuf_size(d_exec->packet));
+
+ key_ofs = nl_msg_start_nested(buf, OVS_PACKET_ATTR_KEY);
+ odp_key_from_pkt_metadata(buf, &d_exec->md);
+ nl_msg_end_nested(buf, key_ofs);
+
+ nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS,
+ d_exec->actions, d_exec->actions_len);
+}
+
+#define MAX_OPS 50
+
+static void
+dpif_netlink_operate__(struct dpif_netlink *dpif,
+ struct dpif_op **ops, size_t n_ops)
+{
+ struct op_auxdata {
+ struct nl_transaction txn;
+
+ struct ofpbuf request;
+ uint64_t request_stub[1024 / 8];
+
+ struct ofpbuf reply;
+ uint64_t reply_stub[1024 / 8];
+ } auxes[MAX_OPS];
+
+ struct nl_transaction *txnsp[MAX_OPS];
+ size_t i;
+
+ ovs_assert(n_ops <= MAX_OPS);
+ for (i = 0; i < n_ops; i++) {
+ struct op_auxdata *aux = &auxes[i];
+ struct dpif_op *op = ops[i];
+ struct dpif_flow_put *put;
+ struct dpif_flow_del *del;
+ struct dpif_execute *execute;
+ struct dpif_flow_get *get;
+ struct dpif_netlink_flow flow;
+
+ ofpbuf_use_stub(&aux->request,
+ aux->request_stub, sizeof aux->request_stub);
+ aux->txn.request = &aux->request;
+
+ ofpbuf_use_stub(&aux->reply, aux->reply_stub, sizeof aux->reply_stub);
+ aux->txn.reply = NULL;
+
+ switch (op->type) {
+ case DPIF_OP_FLOW_PUT:
+ put = &op->u.flow_put;
+ dpif_netlink_init_flow_put(dpif, put, &flow);
+ if (put->stats) {
+ flow.nlmsg_flags |= NLM_F_ECHO;
+ aux->txn.reply = &aux->reply;
+ }
+ dpif_netlink_flow_to_ofpbuf(&flow, &aux->request);
+ break;
+
+ case DPIF_OP_FLOW_DEL:
+ del = &op->u.flow_del;
+ dpif_netlink_init_flow_del(dpif, del, &flow);
+ if (del->stats) {
+ flow.nlmsg_flags |= NLM_F_ECHO;
+ aux->txn.reply = &aux->reply;
+ }
+ dpif_netlink_flow_to_ofpbuf(&flow, &aux->request);
+ break;
+
+ case DPIF_OP_EXECUTE:
+ execute = &op->u.execute;
+ dpif_netlink_encode_execute(dpif->dp_ifindex, execute,
+ &aux->request);
+ break;
+
+ case DPIF_OP_FLOW_GET:
+ get = &op->u.flow_get;
+ dpif_netlink_init_flow_get(dpif, get->key, get->key_len, &flow);
+ aux->txn.reply = get->buffer;
+ dpif_netlink_flow_to_ofpbuf(&flow, &aux->request);
+ break;
+
+ default:
+ OVS_NOT_REACHED();
+ }
+ }
+
+ for (i = 0; i < n_ops; i++) {
+ txnsp[i] = &auxes[i].txn;
+ }
+ nl_transact_multiple(NETLINK_GENERIC, txnsp, n_ops);
+
+ for (i = 0; i < n_ops; i++) {
+ struct op_auxdata *aux = &auxes[i];
+ struct nl_transaction *txn = &auxes[i].txn;
+ struct dpif_op *op = ops[i];
+ struct dpif_flow_put *put;
+ struct dpif_flow_del *del;
+ struct dpif_flow_get *get;
+
+ op->error = txn->error;
+
+ switch (op->type) {
+ case DPIF_OP_FLOW_PUT:
+ put = &op->u.flow_put;
+ if (put->stats) {
+ if (!op->error) {
+ struct dpif_netlink_flow reply;
+
+ op->error = dpif_netlink_flow_from_ofpbuf(&reply,
+ txn->reply);
+ if (!op->error) {
+ dpif_netlink_flow_get_stats(&reply, put->stats);
+ }
+ }
+ }
+ break;
+
+ case DPIF_OP_FLOW_DEL:
+ del = &op->u.flow_del;
+ if (del->stats) {
+ if (!op->error) {
+ struct dpif_netlink_flow reply;
+
+ op->error = dpif_netlink_flow_from_ofpbuf(&reply,
+ txn->reply);
+ if (!op->error) {
+ dpif_netlink_flow_get_stats(&reply, del->stats);
+ }
+ }
+ }
+ break;
+
+ case DPIF_OP_EXECUTE:
+ break;
+
+ case DPIF_OP_FLOW_GET:
+ get = &op->u.flow_get;
+ if (!op->error) {
+ struct dpif_netlink_flow reply;
+
+ op->error = dpif_netlink_flow_from_ofpbuf(&reply, txn->reply);
+ if (!op->error) {
+ dpif_netlink_flow_to_dpif_flow(get->flow, &reply);
+ }
+ }
+ break;
+
+ default:
+ OVS_NOT_REACHED();
+ }
+
+ ofpbuf_uninit(&aux->request);
+ ofpbuf_uninit(&aux->reply);
+ }
+}
+
+static void
+dpif_netlink_operate(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ while (n_ops > 0) {
+ size_t chunk = MIN(n_ops, MAX_OPS);
+ dpif_netlink_operate__(dpif, ops, chunk);
+ ops += chunk;
+ n_ops -= chunk;
+ }
+}
+
+/* Synchronizes 'channels' in 'dpif->handlers' with the set of vports
+ * currently in 'dpif' in the kernel, by adding a new set of channels for
+ * any kernel vport that lacks one and deleting any channels that have no
+ * backing kernel vports. */
+static int
+dpif_netlink_refresh_channels(struct dpif_netlink *dpif, uint32_t n_handlers)
+ OVS_REQ_WRLOCK(dpif->upcall_lock)
+{
+ unsigned long int *keep_channels;
+ struct dpif_netlink_vport vport;
+ size_t keep_channels_nbits;
+ struct nl_dump dump;
+ uint64_t reply_stub[NL_DUMP_BUFSIZE / 8];
+ struct ofpbuf buf;
+ int retval = 0;
+ size_t i;
+
+ if (dpif->n_handlers != n_handlers) {
+ destroy_all_channels(dpif);
+ dpif->handlers = xzalloc(n_handlers * sizeof *dpif->handlers);
+ for (i = 0; i < n_handlers; i++) {
+ struct dpif_handler *handler = &dpif->handlers[i];
+
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ handler->epoll_fd = epoll_create(10);
+ if (handler->epoll_fd < 0) {
+ size_t j;
+
+ for (j = 0; j < i; j++) {
+ close(dpif->handlers[j].epoll_fd);
+ }
+ free(dpif->handlers);
+ dpif->handlers = NULL;
+
+ return errno;
+ }
+#endif
+ }
+ dpif->n_handlers = n_handlers;
+ }
+
+ for (i = 0; i < n_handlers; i++) {
+ struct dpif_handler *handler = &dpif->handlers[i];
+
+ handler->event_offset = handler->n_events = 0;
+ }
+
+ keep_channels_nbits = dpif->uc_array_size;
+ keep_channels = bitmap_allocate(keep_channels_nbits);
+
+ ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub);
+ dpif_netlink_port_dump_start__(dpif, &dump);
+ while (!dpif_netlink_port_dump_next__(dpif, &dump, &vport, &buf)) {
+ uint32_t port_no = odp_to_u32(vport.port_no);
+ uint32_t *upcall_pids = NULL;
+ int error;
+
+ if (port_no >= dpif->uc_array_size
+ || !vport_get_pids(dpif, port_no, &upcall_pids)) {
+ struct nl_sock **socksp = vport_create_socksp(dpif->n_handlers,
+ &error);
+
+ if (!socksp) {
+ goto error;
+ }
+
+ error = vport_add_channels(dpif, vport.port_no, socksp);
+ if (error) {
+ VLOG_INFO("%s: could not add channels for port %s",
+ dpif_name(&dpif->dpif), vport.name);
+ vport_del_socksp(socksp, dpif->n_handlers);
+ retval = error;
+ goto error;
+ }
+ upcall_pids = vport_socksp_to_pids(socksp, dpif->n_handlers);
+ free(socksp);
+ }
+
+ /* Configure the vport to deliver misses to 'sock'. */
+ if (vport.upcall_pids[0] == 0
+ || vport.n_upcall_pids != dpif->n_handlers
+ || memcmp(upcall_pids, vport.upcall_pids, n_handlers * sizeof
+ *upcall_pids)) {
+ struct dpif_netlink_vport vport_request;
+
+ dpif_netlink_vport_init(&vport_request);
+ vport_request.cmd = OVS_VPORT_CMD_SET;
+ vport_request.dp_ifindex = dpif->dp_ifindex;
+ vport_request.port_no = vport.port_no;
+ vport_request.n_upcall_pids = dpif->n_handlers;
+ vport_request.upcall_pids = upcall_pids;
+ error = dpif_netlink_vport_transact(&vport_request, NULL, NULL);
+ if (error) {
+ VLOG_WARN_RL(&error_rl,
+ "%s: failed to set upcall pid on port: %s",
+ dpif_name(&dpif->dpif), ovs_strerror(error));
+
+ if (error != ENODEV && error != ENOENT) {
+ retval = error;
+ } else {
+ /* The vport isn't really there, even though the dump says
+ * it is. Probably we just hit a race after a port
+ * disappeared. */
+ }
+ goto error;
+ }
+ }
+
+ if (port_no < keep_channels_nbits) {
+ bitmap_set1(keep_channels, port_no);
+ }
+ free(upcall_pids);
+ continue;
+
+ error:
+ free(upcall_pids);
+ vport_del_channels(dpif, vport.port_no);
+ }
+ nl_dump_done(&dump);
+ ofpbuf_uninit(&buf);
+
+ /* Discard any saved channels that we didn't reuse. */
+ for (i = 0; i < keep_channels_nbits; i++) {
+ if (!bitmap_is_set(keep_channels, i)) {
+ vport_del_channels(dpif, u32_to_odp(i));
+ }
+ }
+ free(keep_channels);
+
+ return retval;
+}
+
+static int
+dpif_netlink_recv_set__(struct dpif_netlink *dpif, bool enable)
+ OVS_REQ_WRLOCK(dpif->upcall_lock)
+{
+ if ((dpif->handlers != NULL) == enable) {
+ return 0;
+ } else if (!enable) {
+ destroy_all_channels(dpif);
+ return 0;
+ } else {
+ return dpif_netlink_refresh_channels(dpif, 1);
+ }
+}
+
+static int
+dpif_netlink_recv_set(struct dpif *dpif_, bool enable)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ int error;
+
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ error = dpif_netlink_recv_set__(dpif, enable);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ return error;
+}
+
+static int
+dpif_netlink_handlers_set(struct dpif *dpif_, uint32_t n_handlers)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ int error = 0;
+
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ if (dpif->handlers) {
+ error = dpif_netlink_refresh_channels(dpif, n_handlers);
+ }
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ return error;
+}
+
+static int
+dpif_netlink_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
+ uint32_t queue_id, uint32_t *priority)
+{
+ if (queue_id < 0xf000) {
+ *priority = TC_H_MAKE(1 << 16, queue_id + 1);
+ return 0;
+ } else {
+ return EINVAL;
+ }
+}
+
+static int
+parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall,
+ int *dp_ifindex)
+{
+ static const struct nl_policy ovs_packet_policy[] = {
+ /* Always present. */
+ [OVS_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC,
+ .min_len = ETH_HEADER_LEN },
+ [OVS_PACKET_ATTR_KEY] = { .type = NL_A_NESTED },
+
+ /* OVS_PACKET_CMD_ACTION only. */
+ [OVS_PACKET_ATTR_USERDATA] = { .type = NL_A_UNSPEC, .optional = true },
+ [OVS_PACKET_ATTR_EGRESS_TUN_KEY] = { .type = NL_A_NESTED, .optional = true },
+ };
+
+ struct ovs_header *ovs_header;
+ struct nlattr *a[ARRAY_SIZE(ovs_packet_policy)];
+ struct nlmsghdr *nlmsg;
+ struct genlmsghdr *genl;
+ struct ofpbuf b;
+ int type;
+
+ ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
+
+ nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
+ genl = ofpbuf_try_pull(&b, sizeof *genl);
+ ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
+ if (!nlmsg || !genl || !ovs_header
+ || nlmsg->nlmsg_type != ovs_packet_family
+ || !nl_policy_parse(&b, 0, ovs_packet_policy, a,
+ ARRAY_SIZE(ovs_packet_policy))) {
+ return EINVAL;
+ }
+
+ type = (genl->cmd == OVS_PACKET_CMD_MISS ? DPIF_UC_MISS
+ : genl->cmd == OVS_PACKET_CMD_ACTION ? DPIF_UC_ACTION
+ : -1);
+ if (type < 0) {
+ return EINVAL;
+ }
+
+ /* (Re)set ALL fields of '*upcall' on successful return. */
+ upcall->type = type;
+ upcall->key = CONST_CAST(struct nlattr *,
+ nl_attr_get(a[OVS_PACKET_ATTR_KEY]));
+ upcall->key_len = nl_attr_get_size(a[OVS_PACKET_ATTR_KEY]);
+ upcall->userdata = a[OVS_PACKET_ATTR_USERDATA];
+ upcall->out_tun_key = a[OVS_PACKET_ATTR_EGRESS_TUN_KEY];
+
+ /* Allow overwriting the netlink attribute header without reallocating. */
+ ofpbuf_use_stub(&upcall->packet,
+ CONST_CAST(struct nlattr *,
+ nl_attr_get(a[OVS_PACKET_ATTR_PACKET])) - 1,
+ nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]) +
+ sizeof(struct nlattr));
+ ofpbuf_set_data(&upcall->packet,
+ (char *)ofpbuf_data(&upcall->packet) + sizeof(struct nlattr));
+ ofpbuf_set_size(&upcall->packet, nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]));
+
+ *dp_ifindex = ovs_header->dp_ifindex;
+
+ return 0;
+}
+
+static int
+dpif_netlink_recv__(struct dpif_netlink *dpif, uint32_t handler_id,
+ struct dpif_upcall *upcall, struct ofpbuf *buf)
+ OVS_REQ_RDLOCK(dpif->upcall_lock)
+{
+ struct dpif_handler *handler;
+ int read_tries = 0;
+
+ if (!dpif->handlers || handler_id >= dpif->n_handlers) {
+ return EAGAIN;
+ }
+
+ handler = &dpif->handlers[handler_id];
+ if (handler->event_offset >= handler->n_events) {
+ int retval;
+
+ handler->event_offset = handler->n_events = 0;
+
+#ifdef _WIN32
+ retval = dpif->uc_array_size;
+ handler->event_offset = 0;
+#else
+ do {
+ retval = epoll_wait(handler->epoll_fd, handler->epoll_events,
+ dpif->uc_array_size, 0);
+ } while (retval < 0 && errno == EINTR);
+#endif
+ if (retval < 0) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ VLOG_WARN_RL(&rl, "epoll_wait failed (%s)", ovs_strerror(errno));
+ } else if (retval > 0) {
+ handler->n_events = retval;
+ }
+ }
+
+ while (handler->event_offset < handler->n_events) {
+ int idx = handler->epoll_events[handler->event_offset].data.u32;
+ struct dpif_channel *ch = &dpif->handlers[handler_id].channels[idx];
+
+ handler->event_offset++;
+
+ for (;;) {
+ int dp_ifindex;
+ int error;
+
+ if (++read_tries > 50) {
+ return EAGAIN;
+ }
+
+ error = nl_sock_recv(ch->sock, buf, false);
+ if (error == ENOBUFS) {
+ /* ENOBUFS typically means that we've received so many
+ * packets that the buffer overflowed. Try again
+ * immediately because there's almost certainly a packet
+ * waiting for us. */
+ report_loss(dpif, ch, idx, handler_id);
+ continue;
+ }
+
+ ch->last_poll = time_msec();
+ if (error) {
+ if (error == EAGAIN) {
+ break;
+ }
+ return error;
+ }
+
+ error = parse_odp_packet(buf, upcall, &dp_ifindex);
+ if (!error && dp_ifindex == dpif->dp_ifindex) {
+ return 0;
+ } else if (error) {
+ return error;
+ }
+ }
+ }
+
+ return EAGAIN;
+}
+
+static int
+dpif_netlink_recv(struct dpif *dpif_, uint32_t handler_id,
+ struct dpif_upcall *upcall, struct ofpbuf *buf)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ int error;
+
+ fat_rwlock_rdlock(&dpif->upcall_lock);
+ error = dpif_netlink_recv__(dpif, handler_id, upcall, buf);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+
+ return error;
+}
+
+static void
+dpif_netlink_recv_wait__(struct dpif_netlink *dpif, uint32_t handler_id)
+ OVS_REQ_RDLOCK(dpif->upcall_lock)
+{
+#ifdef _WIN32
+ /*
+ * XXX : Map appropiate Windows handle
+ */
+#else
+ if (dpif->handlers && handler_id < dpif->n_handlers) {
+ struct dpif_handler *handler = &dpif->handlers[handler_id];
+
+ poll_fd_wait(handler->epoll_fd, POLLIN);
+ }
+#endif
+}
+
+static void
+dpif_netlink_recv_wait(struct dpif *dpif_, uint32_t handler_id)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ fat_rwlock_rdlock(&dpif->upcall_lock);
+ dpif_netlink_recv_wait__(dpif, handler_id);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+}
+
+static void
+dpif_netlink_recv_purge__(struct dpif_netlink *dpif)
+ OVS_REQ_WRLOCK(dpif->upcall_lock)
+{
+ if (dpif->handlers) {
+ size_t i, j;
+
+ for (i = 0; i < dpif->uc_array_size; i++ ) {
+ if (!dpif->handlers[0].channels[i].sock) {
+ continue;
+ }
+
+ for (j = 0; j < dpif->n_handlers; j++) {
+ nl_sock_drain(dpif->handlers[j].channels[i].sock);
+ }
+ }
+ }
+}
+
+static void
+dpif_netlink_recv_purge(struct dpif *dpif_)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+
+ fat_rwlock_wrlock(&dpif->upcall_lock);
+ dpif_netlink_recv_purge__(dpif);
+ fat_rwlock_unlock(&dpif->upcall_lock);
+}
+
+const struct dpif_class dpif_netlink_class = {
+ "system",
+ dpif_netlink_enumerate,
+ NULL,
+ dpif_netlink_open,
+ dpif_netlink_close,
+ dpif_netlink_destroy,
+ dpif_netlink_run,
+ NULL, /* wait */
+ dpif_netlink_get_stats,
+ dpif_netlink_port_add,
+ dpif_netlink_port_del,
+ dpif_netlink_port_query_by_number,
+ dpif_netlink_port_query_by_name,
+ dpif_netlink_port_get_pid,
+ dpif_netlink_port_dump_start,
+ dpif_netlink_port_dump_next,
+ dpif_netlink_port_dump_done,
+ dpif_netlink_port_poll,
+ dpif_netlink_port_poll_wait,
+ dpif_netlink_flow_flush,
+ dpif_netlink_flow_dump_create,
+ dpif_netlink_flow_dump_destroy,
+ dpif_netlink_flow_dump_thread_create,
+ dpif_netlink_flow_dump_thread_destroy,
+ dpif_netlink_flow_dump_next,
+ dpif_netlink_operate,
+ dpif_netlink_recv_set,
+ dpif_netlink_handlers_set,
+ dpif_netlink_queue_to_priority,
+ dpif_netlink_recv,
+ dpif_netlink_recv_wait,
+ dpif_netlink_recv_purge,
+ NULL, /* register_upcall_cb */
+ NULL, /* enable_upcall */
+ NULL, /* disable_upcall */
+};
+
+static int
+dpif_netlink_init(void)
+{
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+ static int error;
+
+ if (ovsthread_once_start(&once)) {
+ error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY,
+ &ovs_datapath_family);
+ if (error) {
+ VLOG_ERR("Generic Netlink family '%s' does not exist. "
+ "The Open vSwitch kernel module is probably not loaded.",
+ OVS_DATAPATH_FAMILY);
+ }
+ if (!error) {
+ error = nl_lookup_genl_family(OVS_VPORT_FAMILY, &ovs_vport_family);
+ }
+ if (!error) {
+ error = nl_lookup_genl_family(OVS_FLOW_FAMILY, &ovs_flow_family);
+ }
+ if (!error) {
+ error = nl_lookup_genl_family(OVS_PACKET_FAMILY,
+ &ovs_packet_family);
+ }
+ if (!error) {
+ error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP,
+ &ovs_vport_mcgroup);
+ }
+
+ ovsthread_once_done(&once);
+ }
+
+ return error;
+}
+
+bool
+dpif_netlink_is_internal_device(const char *name)
+{
+ struct dpif_netlink_vport reply;
+ struct ofpbuf *buf;
+ int error;
+
+ error = dpif_netlink_vport_get(name, &reply, &buf);
+ if (!error) {
+ ofpbuf_delete(buf);
+ } else if (error != ENODEV && error != ENOENT) {
+ VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)",
+ name, ovs_strerror(error));
+ }
+
+ return reply.type == OVS_VPORT_TYPE_INTERNAL;
+}
+\f
+/* Parses the contents of 'buf', which contains a "struct ovs_header" followed
+ * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a
+ * positive errno value.
+ *
+ * 'vport' will contain pointers into 'buf', so the caller should not free
+ * 'buf' while 'vport' is still in use. */
+static int
+dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *vport,
+ const struct ofpbuf *buf)
+{
+ static const struct nl_policy ovs_vport_policy[] = {
+ [OVS_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 },
+ [OVS_VPORT_ATTR_TYPE] = { .type = NL_A_U32 },
+ [OVS_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ },
+ [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NL_A_UNSPEC },
+ [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats),
+ .optional = true },
+ [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
+ };
+
+ struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)];
+ struct ovs_header *ovs_header;
+ struct nlmsghdr *nlmsg;
+ struct genlmsghdr *genl;
+ struct ofpbuf b;
+
+ dpif_netlink_vport_init(vport);
+
+ ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
+ nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
+ genl = ofpbuf_try_pull(&b, sizeof *genl);
+ ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
+ if (!nlmsg || !genl || !ovs_header
+ || nlmsg->nlmsg_type != ovs_vport_family
+ || !nl_policy_parse(&b, 0, ovs_vport_policy, a,
+ ARRAY_SIZE(ovs_vport_policy))) {
+ return EINVAL;
+ }
+
+ vport->cmd = genl->cmd;
+ vport->dp_ifindex = ovs_header->dp_ifindex;
+ vport->port_no = nl_attr_get_odp_port(a[OVS_VPORT_ATTR_PORT_NO]);
+ vport->type = nl_attr_get_u32(a[OVS_VPORT_ATTR_TYPE]);
+ vport->name = nl_attr_get_string(a[OVS_VPORT_ATTR_NAME]);
+ if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
+ vport->n_upcall_pids = nl_attr_get_size(a[OVS_VPORT_ATTR_UPCALL_PID])
+ / (sizeof *vport->upcall_pids);
+ vport->upcall_pids = nl_attr_get(a[OVS_VPORT_ATTR_UPCALL_PID]);
+
+ }
+ if (a[OVS_VPORT_ATTR_STATS]) {
+ vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]);
+ }
+ if (a[OVS_VPORT_ATTR_OPTIONS]) {
+ vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]);
+ vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]);
+ }
+ return 0;
+}
+
+/* Appends to 'buf' (which must initially be empty) a "struct ovs_header"
+ * followed by Netlink attributes corresponding to 'vport'. */
+static void
+dpif_netlink_vport_to_ofpbuf(const struct dpif_netlink_vport *vport,
+ struct ofpbuf *buf)
+{
+ struct ovs_header *ovs_header;
+
+ nl_msg_put_genlmsghdr(buf, 0, ovs_vport_family, NLM_F_REQUEST | NLM_F_ECHO,
+ vport->cmd, OVS_VPORT_VERSION);
+
+ ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header);
+ ovs_header->dp_ifindex = vport->dp_ifindex;
+
+ if (vport->port_no != ODPP_NONE) {
+ nl_msg_put_odp_port(buf, OVS_VPORT_ATTR_PORT_NO, vport->port_no);
+ }
+
+ if (vport->type != OVS_VPORT_TYPE_UNSPEC) {
+ nl_msg_put_u32(buf, OVS_VPORT_ATTR_TYPE, vport->type);
+ }
+
+ if (vport->name) {
+ nl_msg_put_string(buf, OVS_VPORT_ATTR_NAME, vport->name);
+ }
+
+ if (vport->upcall_pids) {
+ nl_msg_put_unspec(buf, OVS_VPORT_ATTR_UPCALL_PID,
+ vport->upcall_pids,
+ vport->n_upcall_pids * sizeof *vport->upcall_pids);
+ }
+
+ if (vport->stats) {
+ nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS,
+ vport->stats, sizeof *vport->stats);
+ }
+
+ if (vport->options) {
+ nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS,
+ vport->options, vport->options_len);
+ }
+}
+
+/* Clears 'vport' to "empty" values. */
+void
+dpif_netlink_vport_init(struct dpif_netlink_vport *vport)
+{
+ memset(vport, 0, sizeof *vport);
+ vport->port_no = ODPP_NONE;
+}
+
+/* Executes 'request' in the kernel datapath. If the command fails, returns a
+ * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
+ * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
+ * result of the command is expected to be an ovs_vport also, which is decoded
+ * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
+ * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
+int
+dpif_netlink_vport_transact(const struct dpif_netlink_vport *request,
+ struct dpif_netlink_vport *reply,
+ struct ofpbuf **bufp)
+{
+ struct ofpbuf *request_buf;
+ int error;
+
+ ovs_assert((reply != NULL) == (bufp != NULL));
+
+ error = dpif_netlink_init();
+ if (error) {
+ if (reply) {
+ *bufp = NULL;
+ dpif_netlink_vport_init(reply);
+ }
+ return error;
+ }
+
+ request_buf = ofpbuf_new(1024);
+ dpif_netlink_vport_to_ofpbuf(request, request_buf);
+ error = nl_transact(NETLINK_GENERIC, request_buf, bufp);
+ ofpbuf_delete(request_buf);
+
+ if (reply) {
+ if (!error) {
+ error = dpif_netlink_vport_from_ofpbuf(reply, *bufp);
+ }
+ if (error) {
+ dpif_netlink_vport_init(reply);
+ ofpbuf_delete(*bufp);
+ *bufp = NULL;
+ }
+ }
+ return error;
+}
+
+/* Obtains information about the kernel vport named 'name' and stores it into
+ * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no
+ * longer needed ('reply' will contain pointers into '*bufp'). */
+int
+dpif_netlink_vport_get(const char *name, struct dpif_netlink_vport *reply,
+ struct ofpbuf **bufp)
+{
+ struct dpif_netlink_vport request;
+
+ dpif_netlink_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_GET;
+ request.name = name;
+
+ return dpif_netlink_vport_transact(&request, reply, bufp);
+}
+
+/* Parses the contents of 'buf', which contains a "struct ovs_header" followed
+ * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a
+ * positive errno value.
+ *
+ * 'dp' will contain pointers into 'buf', so the caller should not free 'buf'
+ * while 'dp' is still in use. */
+static int
+dpif_netlink_dp_from_ofpbuf(struct dpif_netlink_dp *dp, const struct ofpbuf *buf)
+{
+ static const struct nl_policy ovs_datapath_policy[] = {
+ [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ },
+ [OVS_DP_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_dp_stats),
+ .optional = true },
+ [OVS_DP_ATTR_MEGAFLOW_STATS] = {
+ NL_POLICY_FOR(struct ovs_dp_megaflow_stats),
+ .optional = true },
+ };
+
+ struct nlattr *a[ARRAY_SIZE(ovs_datapath_policy)];
+ struct ovs_header *ovs_header;
+ struct nlmsghdr *nlmsg;
+ struct genlmsghdr *genl;
+ struct ofpbuf b;
+
+ dpif_netlink_dp_init(dp);
+
+ ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
+ nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
+ genl = ofpbuf_try_pull(&b, sizeof *genl);
+ ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
+ if (!nlmsg || !genl || !ovs_header
+ || nlmsg->nlmsg_type != ovs_datapath_family
+ || !nl_policy_parse(&b, 0, ovs_datapath_policy, a,
+ ARRAY_SIZE(ovs_datapath_policy))) {
+ return EINVAL;
+ }
+
+ dp->cmd = genl->cmd;
+ dp->dp_ifindex = ovs_header->dp_ifindex;
+ dp->name = nl_attr_get_string(a[OVS_DP_ATTR_NAME]);
+ if (a[OVS_DP_ATTR_STATS]) {
+ dp->stats = nl_attr_get(a[OVS_DP_ATTR_STATS]);
+ }
+
+ if (a[OVS_DP_ATTR_MEGAFLOW_STATS]) {
+ dp->megaflow_stats = nl_attr_get(a[OVS_DP_ATTR_MEGAFLOW_STATS]);
+ }
+
+ return 0;
+}
+
+/* Appends to 'buf' the Generic Netlink message described by 'dp'. */
+static void
+dpif_netlink_dp_to_ofpbuf(const struct dpif_netlink_dp *dp, struct ofpbuf *buf)
+{
+ struct ovs_header *ovs_header;
+
+ nl_msg_put_genlmsghdr(buf, 0, ovs_datapath_family,
+ NLM_F_REQUEST | NLM_F_ECHO, dp->cmd,
+ OVS_DATAPATH_VERSION);
+
+ ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header);
+ ovs_header->dp_ifindex = dp->dp_ifindex;
+
+ if (dp->name) {
+ nl_msg_put_string(buf, OVS_DP_ATTR_NAME, dp->name);
+ }
+
+ if (dp->upcall_pid) {
+ nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid);
+ }
+
+ if (dp->user_features) {
+ nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features);
+ }
+
+ /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */
+}
+
+/* Clears 'dp' to "empty" values. */
+static void
+dpif_netlink_dp_init(struct dpif_netlink_dp *dp)
+{
+ memset(dp, 0, sizeof *dp);
+}
+
+static void
+dpif_netlink_dp_dump_start(struct nl_dump *dump)
+{
+ struct dpif_netlink_dp request;
+ struct ofpbuf *buf;
+
+ dpif_netlink_dp_init(&request);
+ request.cmd = OVS_DP_CMD_GET;
+
+ buf = ofpbuf_new(1024);
+ dpif_netlink_dp_to_ofpbuf(&request, buf);
+ nl_dump_start(dump, NETLINK_GENERIC, buf);
+ ofpbuf_delete(buf);
+}
+
+/* Executes 'request' in the kernel datapath. If the command fails, returns a
+ * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
+ * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
+ * result of the command is expected to be of the same form, which is decoded
+ * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
+ * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
+static int
+dpif_netlink_dp_transact(const struct dpif_netlink_dp *request,
+ struct dpif_netlink_dp *reply, struct ofpbuf **bufp)
+{
+ struct ofpbuf *request_buf;
+ int error;
+
+ ovs_assert((reply != NULL) == (bufp != NULL));
+
+ request_buf = ofpbuf_new(1024);
+ dpif_netlink_dp_to_ofpbuf(request, request_buf);
+ error = nl_transact(NETLINK_GENERIC, request_buf, bufp);
+ ofpbuf_delete(request_buf);
+
+ if (reply) {
+ dpif_netlink_dp_init(reply);
+ if (!error) {
+ error = dpif_netlink_dp_from_ofpbuf(reply, *bufp);
+ }
+ if (error) {
+ ofpbuf_delete(*bufp);
+ *bufp = NULL;
+ }
+ }
+ return error;
+}
+
+/* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'.
+ * The caller must free '*bufp' when the reply is no longer needed ('reply'
+ * will contain pointers into '*bufp'). */
+static int
+dpif_netlink_dp_get(const struct dpif *dpif_, struct dpif_netlink_dp *reply,
+ struct ofpbuf **bufp)
+{
+ struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
+ struct dpif_netlink_dp request;
+
+ dpif_netlink_dp_init(&request);
+ request.cmd = OVS_DP_CMD_GET;
+ request.dp_ifindex = dpif->dp_ifindex;
+
+ return dpif_netlink_dp_transact(&request, reply, bufp);
+}
+
+/* Parses the contents of 'buf', which contains a "struct ovs_header" followed
+ * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a
+ * positive errno value.
+ *
+ * 'flow' will contain pointers into 'buf', so the caller should not free 'buf'
+ * while 'flow' is still in use. */
+static int
+dpif_netlink_flow_from_ofpbuf(struct dpif_netlink_flow *flow,
+ const struct ofpbuf *buf)
+{
+ static const struct nl_policy ovs_flow_policy[] = {
+ [OVS_FLOW_ATTR_KEY] = { .type = NL_A_NESTED },
+ [OVS_FLOW_ATTR_MASK] = { .type = NL_A_NESTED, .optional = true },
+ [OVS_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true },
+ [OVS_FLOW_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats),
+ .optional = true },
+ [OVS_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true },
+ [OVS_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true },
+ /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */
+ };
+
+ struct nlattr *a[ARRAY_SIZE(ovs_flow_policy)];
+ struct ovs_header *ovs_header;
+ struct nlmsghdr *nlmsg;
+ struct genlmsghdr *genl;
+ struct ofpbuf b;
+
+ dpif_netlink_flow_init(flow);
+
+ ofpbuf_use_const(&b, ofpbuf_data(buf), ofpbuf_size(buf));
+ nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
+ genl = ofpbuf_try_pull(&b, sizeof *genl);
+ ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header);
+ if (!nlmsg || !genl || !ovs_header
+ || nlmsg->nlmsg_type != ovs_flow_family
+ || !nl_policy_parse(&b, 0, ovs_flow_policy, a,
+ ARRAY_SIZE(ovs_flow_policy))) {
+ return EINVAL;
+ }
+
+ flow->nlmsg_flags = nlmsg->nlmsg_flags;
+ flow->dp_ifindex = ovs_header->dp_ifindex;
+ flow->key = nl_attr_get(a[OVS_FLOW_ATTR_KEY]);
+ flow->key_len = nl_attr_get_size(a[OVS_FLOW_ATTR_KEY]);
+
+ if (a[OVS_FLOW_ATTR_MASK]) {
+ flow->mask = nl_attr_get(a[OVS_FLOW_ATTR_MASK]);
+ flow->mask_len = nl_attr_get_size(a[OVS_FLOW_ATTR_MASK]);
+ }
+ if (a[OVS_FLOW_ATTR_ACTIONS]) {
+ flow->actions = nl_attr_get(a[OVS_FLOW_ATTR_ACTIONS]);
+ flow->actions_len = nl_attr_get_size(a[OVS_FLOW_ATTR_ACTIONS]);
+ }
+ if (a[OVS_FLOW_ATTR_STATS]) {
+ flow->stats = nl_attr_get(a[OVS_FLOW_ATTR_STATS]);
+ }
+ if (a[OVS_FLOW_ATTR_TCP_FLAGS]) {
+ flow->tcp_flags = nl_attr_get(a[OVS_FLOW_ATTR_TCP_FLAGS]);
+ }
+ if (a[OVS_FLOW_ATTR_USED]) {
+ flow->used = nl_attr_get(a[OVS_FLOW_ATTR_USED]);
+ }
+ return 0;
+}
+
+/* Appends to 'buf' (which must initially be empty) a "struct ovs_header"
+ * followed by Netlink attributes corresponding to 'flow'. */
+static void
+dpif_netlink_flow_to_ofpbuf(const struct dpif_netlink_flow *flow,
+ struct ofpbuf *buf)
+{
+ struct ovs_header *ovs_header;
+
+ nl_msg_put_genlmsghdr(buf, 0, ovs_flow_family,
+ NLM_F_REQUEST | flow->nlmsg_flags,
+ flow->cmd, OVS_FLOW_VERSION);
+
+ ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header);
+ ovs_header->dp_ifindex = flow->dp_ifindex;
+
+ if (flow->key_len) {
+ nl_msg_put_unspec(buf, OVS_FLOW_ATTR_KEY, flow->key, flow->key_len);
+ }
+
+ if (flow->mask_len) {
+ nl_msg_put_unspec(buf, OVS_FLOW_ATTR_MASK, flow->mask, flow->mask_len);
+ }
+
+ if (flow->actions || flow->actions_len) {
+ nl_msg_put_unspec(buf, OVS_FLOW_ATTR_ACTIONS,
+ flow->actions, flow->actions_len);
+ }
+
+ /* We never need to send these to the kernel. */
+ ovs_assert(!flow->stats);
+ ovs_assert(!flow->tcp_flags);
+ ovs_assert(!flow->used);
+
+ if (flow->clear) {
+ nl_msg_put_flag(buf, OVS_FLOW_ATTR_CLEAR);
+ }
+}
+
+/* Clears 'flow' to "empty" values. */
+static void
+dpif_netlink_flow_init(struct dpif_netlink_flow *flow)
+{
+ memset(flow, 0, sizeof *flow);
+}
+
+/* Executes 'request' in the kernel datapath. If the command fails, returns a
+ * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
+ * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
+ * result of the command is expected to be a flow also, which is decoded and
+ * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply
+ * is no longer needed ('reply' will contain pointers into '*bufp'). */
+static int
+dpif_netlink_flow_transact(struct dpif_netlink_flow *request,
+ struct dpif_netlink_flow *reply,
+ struct ofpbuf **bufp)
+{
+ struct ofpbuf *request_buf;
+ int error;
+
+ ovs_assert((reply != NULL) == (bufp != NULL));
+
+ if (reply) {
+ request->nlmsg_flags |= NLM_F_ECHO;
+ }
+
+ request_buf = ofpbuf_new(1024);
+ dpif_netlink_flow_to_ofpbuf(request, request_buf);
+ error = nl_transact(NETLINK_GENERIC, request_buf, bufp);
+ ofpbuf_delete(request_buf);
+
+ if (reply) {
+ if (!error) {
+ error = dpif_netlink_flow_from_ofpbuf(reply, *bufp);
+ }
+ if (error) {
+ dpif_netlink_flow_init(reply);
+ ofpbuf_delete(*bufp);
+ *bufp = NULL;
+ }
+ }
+ return error;
+}
+
+static void
+dpif_netlink_flow_get_stats(const struct dpif_netlink_flow *flow,
+ struct dpif_flow_stats *stats)
+{
+ if (flow->stats) {
+ stats->n_packets = get_32aligned_u64(&flow->stats->n_packets);
+ stats->n_bytes = get_32aligned_u64(&flow->stats->n_bytes);
+ } else {
+ stats->n_packets = 0;
+ stats->n_bytes = 0;
+ }
+ stats->used = flow->used ? get_32aligned_u64(flow->used) : 0;
+ stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0;
+}
+\f
+/* Logs information about a packet that was recently lost in 'ch' (in
+ * 'dpif_'). */
+static void
+report_loss(struct dpif_netlink *dpif, struct dpif_channel *ch, uint32_t ch_idx,
+ uint32_t handler_id)
+{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
+ struct ds s;
+
+ if (VLOG_DROP_WARN(&rl)) {
+ return;
+ }
+
+ ds_init(&s);
+ if (ch->last_poll != LLONG_MIN) {
+ ds_put_format(&s, " (last polled %lld ms ago)",
+ time_msec() - ch->last_poll);
+ }
+
+ VLOG_WARN("%s: lost packet on port channel %u of handler %u",
+ dpif_name(&dpif->dpif), ch_idx, handler_id);
+ ds_destroy(&s);
+}
--- /dev/null
+/*
+ * Copyright (c) 2010, 2011, 2014 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DPIF_NETLINK_H
+#define DPIF_NETLINK_H 1
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include "odp-netlink.h"
+
+#include "flow.h"
+
+struct ofpbuf;
+
+struct dpif_netlink_vport {
+ /* Generic Netlink header. */
+ uint8_t cmd;
+
+ /* ovs_vport header. */
+ int dp_ifindex;
+ odp_port_t port_no; /* ODPP_NONE if unknown. */
+ enum ovs_vport_type type;
+
+ /* Attributes.
+ *
+ * The 'stats' member points to 64-bit data that might only be aligned on
+ * 32-bit boundaries, so use get_unaligned_u64() to access its values.
+ */
+ const char *name; /* OVS_VPORT_ATTR_NAME. */
+ uint32_t n_upcall_pids;
+ const uint32_t *upcall_pids; /* OVS_VPORT_ATTR_UPCALL_PID. */
+ const struct ovs_vport_stats *stats; /* OVS_VPORT_ATTR_STATS. */
+ const struct nlattr *options; /* OVS_VPORT_ATTR_OPTIONS. */
+ size_t options_len;
+};
+
+void dpif_netlink_vport_init(struct dpif_netlink_vport *);
+
+int dpif_netlink_vport_transact(const struct dpif_netlink_vport *request,
+ struct dpif_netlink_vport *reply,
+ struct ofpbuf **bufp);
+int dpif_netlink_vport_get(const char *name, struct dpif_netlink_vport *reply,
+ struct ofpbuf **bufp);
+
+bool dpif_netlink_is_internal_device(const char *name);
+
+#endif /* dpif-netlink.h */
void (*disable_upcall)(struct dpif *);
};
-extern const struct dpif_class dpif_linux_class;
+extern const struct dpif_class dpif_netlink_class;
extern const struct dpif_class dpif_netdev_class;
#ifdef __cplusplus
COVERAGE_DEFINE(dpif_execute_with_help);
static const struct dpif_class *base_dpif_classes[] = {
-#ifdef __linux__
- &dpif_linux_class,
+#if defined(__linux__) || defined(_WIN32)
+ &dpif_netlink_class,
#endif
&dpif_netdev_class,
};
* called after the dpif_provider's '->execute' function, which is allowed to
* modify execute->packet and execute->md. In practice, though:
*
- * - dpif-linux doesn't modify execute->packet or execute->md.
+ * - dpif-netlink doesn't modify execute->packet or execute->md.
*
* - dpif-netdev does modify them but it is less likely to have problems
* because it is built into ovs-vswitchd and cannot have version skew,
*
* The meaning of 'in_port' is context-dependent. In most cases, it is a
* 16-bit OpenFlow 1.0 port number. In the software datapath interface (dpif)
- * layer and its implementations (e.g. dpif-linux, dpif-netdev), it is instead
- * a 32-bit datapath port number.
+ * layer and its implementations (e.g. dpif-netlink, dpif-netdev), it is
+ * instead a 32-bit datapath port number.
*
* The fields are organized in four segments to facilitate staged lookup, where
* lower layer fields are first used to determine if the later fields need to
#include <unistd.h>
#include "coverage.h"
-#include "dpif-linux.h"
+#include "dpif-netlink.h"
#include "dpif-netdev.h"
#include "dynamic-string.h"
#include "fatal-signal.h"
static int
get_stats_via_vport__(const struct netdev *netdev, struct netdev_stats *stats)
{
- struct dpif_linux_vport reply;
+ struct dpif_netlink_vport reply;
struct ofpbuf *buf;
int error;
- error = dpif_linux_vport_get(netdev_get_name(netdev), &reply, &buf);
+ error = dpif_netlink_vport_get(netdev_get_name(netdev), &reply, &buf);
if (error) {
return error;
} else if (!reply.stats) {
#include <stdbool.h>
#include <stddef.h>
-struct dpif_linux_vport;
+struct dpif_netlink_vport;
struct dpif_flow_stats;
struct netdev;
struct netdev_class;
projects / cascardo / ovs.git / commitdiff