/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*/
#include <config.h>
-#include "dpif.h"
+
+#include "dpif-linux.h"
#include <assert.h>
#include <ctype.h>
#include <inttypes.h>
#include <net/if.h>
#include <linux/types.h>
-#include <linux/ethtool.h>
#include <linux/pkt_sched.h>
#include <linux/rtnetlink.h>
#include <linux/sockios.h>
+#include <poll.h>
#include <stdlib.h>
-#include <sys/ioctl.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 "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 "openvswitch/datapath-compat.h"
#include "openvswitch/tunnel.h"
+#include "packets.h"
#include "poll-loop.h"
-#include "rtnetlink.h"
+#include "random.h"
#include "shash.h"
-#include "svec.h"
+#include "sset.h"
+#include "unaligned.h"
#include "util.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(dpif_linux);
+enum { MAX_PORTS = USHRT_MAX };
+
+enum { N_UPCALL_SOCKS = 16 };
+BUILD_ASSERT_DECL(IS_POW2(N_UPCALL_SOCKS));
+BUILD_ASSERT_DECL(N_UPCALL_SOCKS <= 32); /* We use a 32-bit word as a mask. */
+
+/* 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_UPCALL_PID. */
+ struct ovs_dp_stats stats; /* OVS_DP_ATTR_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 *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 *);
/* Datapath interface for the openvswitch Linux kernel module. */
struct dpif_linux {
struct dpif dpif;
- int fd;
+ int dp_ifindex;
- /* Used by dpif_linux_get_all_names(). */
- char *local_ifname;
- int minor;
+ /* Upcall messages. */
+ struct nl_sock *upcall_socks[N_UPCALL_SOCKS];
+ uint32_t ready_mask; /* 1-bit for each sock with unread messages. */
+ int epoll_fd; /* epoll fd that includes the upcall socks. */
/* Change notification. */
- int local_ifindex; /* Ifindex of local port. */
- struct shash changed_ports; /* Ports that have changed. */
- struct rtnetlink_notifier port_notifier;
+ struct sset changed_ports; /* Ports that have changed. */
+ struct nln_notifier *port_notifier;
bool change_error;
+
+ /* Port number allocation. */
+ uint16_t alloc_port_no;
};
static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5);
-static int do_ioctl(const struct dpif *, int cmd, const void *arg);
-static int lookup_minor(const char *name, int *minor);
-static int finish_open(struct dpif *, const char *local_ifname);
-static int get_openvswitch_major(void);
-static int create_minor(const char *name, int minor, struct dpif **dpifp);
-static int open_minor(int minor, struct dpif **dpifp);
-static int make_openvswitch_device(int minor, char **fnp);
-static void dpif_linux_port_changed(const struct rtnetlink_change *,
- void *dpif);
+/* Generic Netlink family numbers for OVS. */
+static int ovs_datapath_family;
+static int ovs_vport_family;
+static int ovs_flow_family;
+static int ovs_packet_family;
+
+/* Generic Netlink socket. */
+static struct nl_sock *genl_sock;
+static struct nln *nln = NULL;
+
+static int dpif_linux_init(void);
+static void open_dpif(const struct dpif_linux_dp *, struct dpif **);
+static bool dpif_linux_nln_parse(struct ofpbuf *, void *);
+static void dpif_linux_port_changed(const void *vport, void *dpif);
+static uint32_t dpif_linux_port_get_pid(const struct dpif *, uint16_t port_no);
+
+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)
}
static int
-dpif_linux_enumerate(struct svec *all_dps)
+dpif_linux_enumerate(struct sset *all_dps)
{
- int major;
+ struct nl_dump dump;
+ struct ofpbuf msg;
int error;
- int i;
- /* Check that the Open vSwitch module is loaded. */
- major = get_openvswitch_major();
- if (major < 0) {
- return -major;
+ error = dpif_linux_init();
+ if (error) {
+ return error;
}
- error = 0;
- for (i = 0; i < ODP_MAX; i++) {
- struct dpif *dpif;
- char devname[16];
- int retval;
+ dpif_linux_dp_dump_start(&dump);
+ while (nl_dump_next(&dump, &msg)) {
+ struct dpif_linux_dp dp;
- sprintf(devname, "dp%d", i);
- retval = dpif_open(devname, "system", &dpif);
- if (!retval) {
- svec_add(all_dps, devname);
- dpif_uninit(dpif, true);
- } else if (retval != ENODEV && !error) {
- error = retval;
+ if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) {
+ sset_add(all_dps, dp.name);
}
}
- return error;
+ 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)
{
- int minor;
+ struct dpif_linux_dp dp_request, dp;
+ struct ofpbuf *buf;
+ uint32_t upcall_pid;
+ int error;
- minor = !strncmp(name, "dp", 2)
- && isdigit((unsigned char)name[2]) ? atoi(name + 2) : -1;
- if (create) {
- if (minor >= 0) {
- return create_minor(name, minor, dpifp);
- } else {
- /* Scan for unused minor number. */
- for (minor = 0; minor < ODP_MAX; minor++) {
- int error = create_minor(name, minor, dpifp);
- if (error != EBUSY) {
- return error;
- }
- }
+ error = dpif_linux_init();
+ if (error) {
+ return error;
+ }
- /* All datapath numbers in use. */
- return ENOBUFS;
- }
+ /* 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 {
- struct dpif_linux *dpif;
- struct odp_port port;
- int error;
+ dp_request.cmd = OVS_DP_CMD_GET;
+ }
+ dp_request.name = name;
+ error = dpif_linux_dp_transact(&dp_request, &dp, &buf);
+ if (error) {
+ return error;
+ }
- if (minor < 0) {
- error = lookup_minor(name, &minor);
- if (error) {
- return error;
- }
- }
+ open_dpif(&dp, dpifp);
+ ofpbuf_delete(buf);
+ return 0;
+}
- error = open_minor(minor, dpifp);
- if (error) {
- return error;
- }
- dpif = dpif_linux_cast(*dpifp);
-
- /* We need the local port's ifindex for the poll function. Start by
- * getting the local port's name. */
- memset(&port, 0, sizeof port);
- port.port = ODPP_LOCAL;
- if (ioctl(dpif->fd, ODP_VPORT_QUERY, &port)) {
- error = errno;
- if (error != ENODEV) {
- VLOG_WARN("%s: probe returned unexpected error: %s",
- dpif_name(*dpifp), strerror(error));
- }
- dpif_uninit(*dpifp, true);
- return error;
- }
+static void
+open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp)
+{
+ struct dpif_linux *dpif;
+
+ dpif = xzalloc(sizeof *dpif);
+ dpif->port_notifier = nln_notifier_create(nln, dpif_linux_port_changed,
+ dpif);
+ dpif->epoll_fd = -1;
+
+ dpif_init(&dpif->dpif, &dpif_linux_class, dp->name,
+ dp->dp_ifindex, dp->dp_ifindex);
+
+ dpif->dp_ifindex = dp->dp_ifindex;
+ sset_init(&dpif->changed_ports);
+ *dpifp = &dpif->dpif;
+}
+
+static void
+destroy_upcall_socks(struct dpif_linux *dpif)
+{
+ int i;
- /* Then use that to finish up opening. */
- return finish_open(&dpif->dpif, port.devname);
+ if (dpif->epoll_fd >= 0) {
+ close(dpif->epoll_fd);
+ dpif->epoll_fd = -1;
+ }
+ for (i = 0; i < N_UPCALL_SOCKS; i++) {
+ nl_sock_destroy(dpif->upcall_socks[i]);
+ dpif->upcall_socks[i] = NULL;
}
}
dpif_linux_close(struct dpif *dpif_)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- rtnetlink_notifier_unregister(&dpif->port_notifier);
- shash_destroy(&dpif->changed_ports);
- free(dpif->local_ifname);
- close(dpif->fd);
+
+ nln_notifier_destroy(dpif->port_notifier);
+ destroy_upcall_socks(dpif);
+ sset_destroy(&dpif->changed_ports);
free(dpif);
}
static int
-dpif_linux_get_all_names(const struct dpif *dpif_, struct svec *all_names)
+dpif_linux_destroy(struct dpif *dpif_)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ struct dpif_linux_dp dp;
- svec_add_nocopy(all_names, xasprintf("dp%d", dpif->minor));
- svec_add(all_names, dpif->local_ifname);
- return 0;
+ 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 int
-dpif_linux_destroy(struct dpif *dpif_)
+static void
+dpif_linux_run(struct dpif *dpif OVS_UNUSED)
{
- return do_ioctl(dpif_, ODP_DP_DESTROY, NULL);
+ if (nln) {
+ nln_run(nln);
+ }
}
-static int
-dpif_linux_get_stats(const struct dpif *dpif_, struct odp_stats *stats)
+static void
+dpif_linux_wait(struct dpif *dpif OVS_UNUSED)
{
- memset(stats, 0, sizeof *stats);
- return do_ioctl(dpif_, ODP_DP_STATS, stats);
+ if (nln) {
+ nln_wait(nln);
+ }
}
static int
-dpif_linux_get_drop_frags(const struct dpif *dpif_, bool *drop_fragsp)
+dpif_linux_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats)
{
- int drop_frags;
+ struct dpif_linux_dp dp;
+ struct ofpbuf *buf;
int error;
- error = do_ioctl(dpif_, ODP_GET_DROP_FRAGS, &drop_frags);
+ error = dpif_linux_dp_get(dpif_, &dp, &buf);
if (!error) {
- *drop_fragsp = drop_frags & 1;
+ stats->n_hit = dp.stats.n_hit;
+ stats->n_missed = dp.stats.n_missed;
+ stats->n_lost = dp.stats.n_lost;
+ stats->n_flows = dp.stats.n_flows;
+ ofpbuf_delete(buf);
}
return error;
}
static int
-dpif_linux_set_drop_frags(struct dpif *dpif_, bool drop_frags)
+dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev,
+ uint16_t *port_nop)
{
- int drop_frags_int = drop_frags;
- return do_ioctl(dpif_, ODP_SET_DROP_FRAGS, &drop_frags_int);
-}
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ const char *name = netdev_get_name(netdev);
+ const char *type = netdev_get_type(netdev);
+ struct dpif_linux_vport request, reply;
+ const struct ofpbuf *options;
+ struct ofpbuf *buf;
+ int error, i = 0, max_ports = MAX_PORTS;
+
+ dpif_linux_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_NEW;
+ request.dp_ifindex = dpif->dp_ifindex;
+ request.type = netdev_vport_get_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_), name, type);
+ return EINVAL;
+ }
+ request.name = name;
-static void
-translate_vport_type_to_netdev_type(struct odp_port *port)
-{
- char *type = port->type;
+ options = netdev_vport_get_options(netdev);
+ if (options && options->size) {
+ request.options = options->data;
+ request.options_len = options->size;
+ }
+
+ if (request.type == OVS_VPORT_TYPE_NETDEV) {
+ netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false);
+ }
+
+ /* Loop until we find a port that isn't used. */
+ do {
+ uint32_t upcall_pid;
- if (!strcmp(type, "netdev")) {
- ovs_strlcpy(type, "system", sizeof port->type);
- } else if (!strcmp(type, "gre")) {
- const struct tnl_port_config *config;
+ request.port_no = ++dpif->alloc_port_no;
+ upcall_pid = dpif_linux_port_get_pid(dpif_, request.port_no);
+ request.upcall_pid = &upcall_pid;
+ error = dpif_linux_vport_transact(&request, &reply, &buf);
- config = (struct tnl_port_config *)port->config;
- if (config->flags & TNL_F_IPSEC) {
- ovs_strlcpy(type, "ipsec_gre", sizeof port->type);
+ if (!error) {
+ *port_nop = reply.port_no;
+ VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32,
+ dpif_name(dpif_), request.port_no, upcall_pid);
+ } else if (error == EFBIG) {
+ /* Older datapath has lower limit. */
+ max_ports = dpif->alloc_port_no;
+ dpif->alloc_port_no = 0;
}
- }
+
+ ofpbuf_delete(buf);
+ } while ((i++ < max_ports)
+ && (error == EBUSY || error == EFBIG));
+
+ return error;
}
-static void
-translate_netdev_type_to_vport_type(struct odp_port *port)
+static int
+dpif_linux_port_del(struct dpif *dpif_, uint16_t port_no)
{
- char *type = port->type;
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ struct dpif_linux_vport vport;
+ int error;
- if (!strcmp(type, "system")) {
- ovs_strlcpy(type, "netdev", sizeof port->type);
- } else if (!strcmp(type, "ipsec_gre")) {
- ovs_strlcpy(type, "gre", sizeof port->type);
- }
+ 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);
+
+ return error;
}
static int
-dpif_linux_port_add(struct dpif *dpif, struct netdev *netdev,
- uint16_t *port_nop)
+dpif_linux_port_query__(const struct dpif *dpif, uint32_t port_no,
+ const char *port_name, struct dpif_port *dpif_port)
{
- const char *name = netdev_get_name(netdev);
- const char *type = netdev_get_type(netdev);
- struct odp_port port;
+ struct dpif_linux_vport request;
+ struct dpif_linux_vport reply;
+ struct ofpbuf *buf;
int error;
- memset(&port, 0, sizeof port);
- strncpy(port.devname, name, sizeof port.devname);
- strncpy(port.type, type, sizeof port.type);
- netdev_vport_get_config(netdev, port.config);
- translate_netdev_type_to_vport_type(&port);
+ dpif_linux_vport_init(&request);
+ request.cmd = OVS_VPORT_CMD_GET;
+ request.dp_ifindex = dpif_linux_cast(dpif)->dp_ifindex;
+ request.port_no = port_no;
+ request.name = port_name;
- error = do_ioctl(dpif, ODP_VPORT_ATTACH, &port);
+ error = dpif_linux_vport_transact(&request, &reply, &buf);
if (!error) {
- *port_nop = port.port;
+ 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 {
+ dpif_port->name = xstrdup(reply.name);
+ dpif_port->type = xstrdup(netdev_vport_get_netdev_type(&reply));
+ dpif_port->port_no = reply.port_no;
+ }
+ ofpbuf_delete(buf);
}
-
return error;
}
static int
-dpif_linux_port_del(struct dpif *dpif_, uint16_t port_no_)
+dpif_linux_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
+ struct dpif_port *dpif_port)
{
- int port_no = port_no_; /* Kernel expects an "int". */
- return do_ioctl(dpif_, ODP_VPORT_DETACH, &port_no);
+ return dpif_linux_port_query__(dpif, port_no, NULL, dpif_port);
}
static int
-dpif_linux_port_query__(const struct dpif *dpif, struct odp_port *port)
+dpif_linux_port_query_by_name(const struct dpif *dpif, const char *devname,
+ struct dpif_port *dpif_port)
{
- int error = do_ioctl(dpif, ODP_VPORT_QUERY, port);
- if (!error) {
- translate_vport_type_to_netdev_type(port);
- }
- return error;
+ return dpif_linux_port_query__(dpif, 0, devname, dpif_port);
}
static int
-dpif_linux_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
- struct odp_port *port)
+dpif_linux_get_max_ports(const struct dpif *dpif OVS_UNUSED)
{
- memset(port, 0, sizeof *port);
- port->port = port_no;
- return dpif_linux_port_query__(dpif, port);
+ return MAX_PORTS;
}
-static int
-dpif_linux_port_query_by_name(const struct dpif *dpif, const char *devname,
- struct odp_port *port)
+static uint32_t
+dpif_linux_port_get_pid(const struct dpif *dpif_, uint16_t port_no)
{
- memset(port, 0, sizeof *port);
- strncpy(port->devname, devname, sizeof port->devname);
- return dpif_linux_port_query__(dpif, port);
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+
+ if (dpif->epoll_fd < 0) {
+ return 0;
+ } else {
+ int idx = port_no & (N_UPCALL_SOCKS - 1);
+ return nl_sock_pid(dpif->upcall_socks[idx]);
+ }
}
static int
dpif_linux_flow_flush(struct dpif *dpif_)
{
- return do_ioctl(dpif_, ODP_FLOW_FLUSH, NULL);
+ 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;
+};
+
+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;
+ struct dpif_linux_vport request;
+ struct ofpbuf *buf;
+
+ *statep = state = xmalloc(sizeof *state);
+
+ dpif_linux_vport_init(&request);
+ request.cmd = OVS_DP_CMD_GET;
+ request.dp_ifindex = dpif->dp_ifindex;
+
+ buf = ofpbuf_new(1024);
+ dpif_linux_vport_to_ofpbuf(&request, buf);
+ nl_dump_start(&state->dump, genl_sock, buf);
+ ofpbuf_delete(buf);
+
+ return 0;
}
static int
-dpif_linux_port_list(const struct dpif *dpif_, struct odp_port *ports, int n)
+dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_,
+ struct dpif_port *dpif_port)
{
- struct odp_portvec pv;
- unsigned int i;
+ struct dpif_linux_port_state *state = state_;
+ struct dpif_linux_vport vport;
+ struct ofpbuf buf;
int error;
- pv.ports = ports;
- pv.n_ports = n;
- error = do_ioctl(dpif_, ODP_VPORT_LIST, &pv);
+ if (!nl_dump_next(&state->dump, &buf)) {
+ return EOF;
+ }
+
+ error = dpif_linux_vport_from_ofpbuf(&vport, &buf);
if (error) {
- return -error;
+ return error;
}
- for (i = 0; i < pv.n_ports; i++) {
- struct odp_port *port = &pv.ports[i];
+ dpif_port->name = (char *) vport.name;
+ dpif_port->type = (char *) netdev_vport_get_netdev_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);
- translate_vport_type_to_netdev_type(port);
- }
- return pv.n_ports;
+ free(state);
+ return error;
}
static int
if (dpif->change_error) {
dpif->change_error = false;
- shash_clear(&dpif->changed_ports);
+ sset_clear(&dpif->changed_ports);
return ENOBUFS;
- } else if (!shash_is_empty(&dpif->changed_ports)) {
- struct shash_node *node = shash_first(&dpif->changed_ports);
- *devnamep = shash_steal(&dpif->changed_ports, node);
+ } else if (!sset_is_empty(&dpif->changed_ports)) {
+ *devnamep = sset_pop(&dpif->changed_ports);
return 0;
} else {
return EAGAIN;
dpif_linux_port_poll_wait(const struct dpif *dpif_)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- if (!shash_is_empty(&dpif->changed_ports) || dpif->change_error) {
+ if (!sset_is_empty(&dpif->changed_ports) || dpif->change_error) {
poll_immediate_wake();
- } else {
- rtnetlink_notifier_wait();
}
}
static int
-dpif_linux_flow_get(const struct dpif *dpif_, struct odp_flow flows[], int n)
-{
- struct odp_flowvec fv;
- fv.flows = flows;
- fv.n_flows = n;
- return do_ioctl(dpif_, ODP_FLOW_GET, &fv);
-}
-
-static int
-dpif_linux_flow_put(struct dpif *dpif_, struct odp_flow_put *put)
-{
- return do_ioctl(dpif_, ODP_FLOW_PUT, put);
-}
-
-static int
-dpif_linux_flow_del(struct dpif *dpif_, struct odp_flow *flow)
+dpif_linux_flow_get__(const struct dpif *dpif_,
+ const struct nlattr *key, size_t key_len,
+ struct dpif_linux_flow *reply, struct ofpbuf **bufp)
{
- return do_ioctl(dpif_, ODP_FLOW_DEL, flow);
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ 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;
+ return dpif_linux_flow_transact(&request, reply, bufp);
}
static int
-dpif_linux_flow_list(const struct dpif *dpif_, struct odp_flow flows[], int n)
+dpif_linux_flow_get(const struct dpif *dpif_,
+ const struct nlattr *key, size_t key_len,
+ struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
{
- struct odp_flowvec fv;
+ struct dpif_linux_flow reply;
+ struct ofpbuf *buf;
int error;
- fv.flows = flows;
- fv.n_flows = n;
- error = do_ioctl(dpif_, ODP_FLOW_LIST, &fv);
- return error ? -error : fv.n_flows;
+ error = dpif_linux_flow_get__(dpif_, key, key_len, &reply, &buf);
+ if (!error) {
+ if (stats) {
+ dpif_linux_flow_get_stats(&reply, stats);
+ }
+ if (actionsp) {
+ buf->data = (void *) reply.actions;
+ buf->size = reply.actions_len;
+ *actionsp = buf;
+ } else {
+ ofpbuf_delete(buf);
+ }
+ }
+ return error;
}
-static int
-dpif_linux_execute(struct dpif *dpif_,
- const struct nlattr *actions, size_t actions_len,
- const struct ofpbuf *buf)
+static void
+dpif_linux_init_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put,
+ struct dpif_linux_flow *request)
{
- struct odp_execute execute;
- memset(&execute, 0, sizeof execute);
- execute.actions = (struct nlattr *) actions;
- execute.actions_len = actions_len;
- execute.data = buf->data;
- execute.length = buf->size;
- return do_ioctl(dpif_, ODP_EXECUTE, &execute);
-}
+ static struct nlattr dummy_action;
-static int
-dpif_linux_recv_get_mask(const struct dpif *dpif_, int *listen_mask)
-{
- return do_ioctl(dpif_, ODP_GET_LISTEN_MASK, listen_mask);
-}
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-static int
-dpif_linux_recv_set_mask(struct dpif *dpif_, int listen_mask)
-{
- return do_ioctl(dpif_, ODP_SET_LISTEN_MASK, &listen_mask);
+ 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;
+ /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */
+ request->actions = put->actions ? put->actions : &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 int
-dpif_linux_get_sflow_probability(const struct dpif *dpif_,
- uint32_t *probability)
+dpif_linux_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put)
{
- return do_ioctl(dpif_, ODP_GET_SFLOW_PROBABILITY, probability);
-}
+ struct dpif_linux_flow request, reply;
+ struct ofpbuf *buf;
+ int error;
-static int
-dpif_linux_set_sflow_probability(struct dpif *dpif_, uint32_t probability)
-{
- return do_ioctl(dpif_, ODP_SET_SFLOW_PROBABILITY, &probability);
+ dpif_linux_init_flow_put(dpif_, put, &request);
+ error = dpif_linux_flow_transact(&request,
+ put->stats ? &reply : NULL,
+ put->stats ? &buf : NULL);
+ if (!error && put->stats) {
+ dpif_linux_flow_get_stats(&reply, put->stats);
+ ofpbuf_delete(buf);
+ }
+ return error;
}
-static int
-dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
- uint32_t queue_id, uint32_t *priority)
+static void
+dpif_linux_init_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del,
+ struct dpif_linux_flow *request)
{
- if (queue_id < 0xf000) {
- *priority = TC_H_MAKE(1 << 16, queue_id + 1);
- return 0;
- } else {
- return EINVAL;
- }
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+
+ 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;
}
static int
-dpif_linux_recv(struct dpif *dpif_, struct ofpbuf **bufp)
+dpif_linux_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del)
{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ struct dpif_linux_flow request, reply;
struct ofpbuf *buf;
- int retval;
int error;
- buf = ofpbuf_new_with_headroom(65536, DPIF_RECV_MSG_PADDING);
- retval = read(dpif->fd, ofpbuf_tail(buf), ofpbuf_tailroom(buf));
- if (retval < 0) {
- error = errno;
- if (error != EAGAIN) {
- VLOG_WARN_RL(&error_rl, "%s: read failed: %s",
- dpif_name(dpif_), strerror(error));
- }
- } else if (retval >= sizeof(struct odp_msg)) {
- struct odp_msg *msg = buf->data;
- if (msg->length <= retval) {
- buf->size += retval;
- *bufp = buf;
- return 0;
- } else {
- VLOG_WARN_RL(&error_rl, "%s: discarding message truncated "
- "from %"PRIu32" bytes to %d",
- dpif_name(dpif_), msg->length, retval);
- error = ERANGE;
- }
- } else if (!retval) {
- VLOG_WARN_RL(&error_rl, "%s: unexpected end of file", dpif_name(dpif_));
- error = EPROTO;
- } else {
- VLOG_WARN_RL(&error_rl,
- "%s: discarding too-short message (%d bytes)",
- dpif_name(dpif_), retval);
- error = ERANGE;
+ dpif_linux_init_flow_del(dpif_, del, &request);
+ error = dpif_linux_flow_transact(&request,
+ del->stats ? &reply : NULL,
+ del->stats ? &buf : NULL);
+ if (!error && del->stats) {
+ dpif_linux_flow_get_stats(&reply, del->stats);
+ ofpbuf_delete(buf);
}
-
- *bufp = NULL;
- ofpbuf_delete(buf);
return error;
}
-static void
-dpif_linux_recv_wait(struct dpif *dpif_)
-{
- struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- poll_fd_wait(dpif->fd, POLLIN);
-}
-
-const struct dpif_class dpif_linux_class = {
- "system",
- NULL,
- NULL,
- dpif_linux_enumerate,
- dpif_linux_open,
- dpif_linux_close,
- dpif_linux_get_all_names,
- dpif_linux_destroy,
- dpif_linux_get_stats,
- dpif_linux_get_drop_frags,
- dpif_linux_set_drop_frags,
- dpif_linux_port_add,
- dpif_linux_port_del,
- dpif_linux_port_query_by_number,
- dpif_linux_port_query_by_name,
- dpif_linux_port_list,
- dpif_linux_port_poll,
- dpif_linux_port_poll_wait,
- dpif_linux_flow_get,
- dpif_linux_flow_put,
- dpif_linux_flow_del,
- dpif_linux_flow_flush,
- dpif_linux_flow_list,
- dpif_linux_execute,
- dpif_linux_recv_get_mask,
- dpif_linux_recv_set_mask,
- dpif_linux_get_sflow_probability,
- dpif_linux_set_sflow_probability,
- dpif_linux_queue_to_priority,
- dpif_linux_recv,
- dpif_linux_recv_wait,
+struct dpif_linux_flow_state {
+ struct nl_dump dump;
+ struct dpif_linux_flow flow;
+ struct dpif_flow_stats stats;
+ struct ofpbuf *buf;
};
-\f
-static int get_openvswitch_major(void);
-static int get_major(const char *target);
static int
-do_ioctl(const struct dpif *dpif_, int cmd, const void *arg)
+dpif_linux_flow_dump_start(const struct dpif *dpif_, void **statep)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- return ioctl(dpif->fd, cmd, arg) ? errno : 0;
-}
-
-static int
-lookup_minor(const char *name, int *minorp)
-{
- struct ethtool_drvinfo drvinfo;
- int minor, port_no;
- struct ifreq ifr;
- int error;
- int sock;
-
- sock = socket(AF_INET, SOCK_DGRAM, 0);
- if (sock < 0) {
- VLOG_WARN("socket(AF_INET) failed: %s", strerror(errno));
- error = errno;
- goto error;
- }
+ struct dpif_linux_flow_state *state;
+ struct dpif_linux_flow request;
+ struct ofpbuf *buf;
- memset(&ifr, 0, sizeof ifr);
- strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
- ifr.ifr_data = (caddr_t) &drvinfo;
+ *statep = state = xmalloc(sizeof *state);
- memset(&drvinfo, 0, sizeof drvinfo);
- drvinfo.cmd = ETHTOOL_GDRVINFO;
- if (ioctl(sock, SIOCETHTOOL, &ifr)) {
- VLOG_WARN("ioctl(SIOCETHTOOL) failed: %s", strerror(errno));
- error = errno;
- goto error_close_sock;
- }
+ dpif_linux_flow_init(&request);
+ request.cmd = OVS_DP_CMD_GET;
+ request.dp_ifindex = dpif->dp_ifindex;
- if (strcmp(drvinfo.driver, "openvswitch")) {
- VLOG_WARN("%s is not an openvswitch device", name);
- error = EOPNOTSUPP;
- goto error_close_sock;
- }
+ buf = ofpbuf_new(1024);
+ dpif_linux_flow_to_ofpbuf(&request, buf);
+ nl_dump_start(&state->dump, genl_sock, buf);
+ ofpbuf_delete(buf);
- if (sscanf(drvinfo.bus_info, "%d.%d", &minor, &port_no) != 2) {
- VLOG_WARN("%s ethtool bus_info has unexpected format", name);
- error = EPROTOTYPE;
- goto error_close_sock;
- } else if (port_no != ODPP_LOCAL) {
- /* This is an Open vSwitch device but not the local port. We
- * intentionally support only using the name of the local port as the
- * name of a datapath; otherwise, it would be too difficult to
- * enumerate all the names of a datapath. */
- error = EOPNOTSUPP;
- goto error_close_sock;
- }
+ state->buf = NULL;
- *minorp = minor;
- close(sock);
return 0;
-
-error_close_sock:
- close(sock);
-error:
- return error;
}
static int
-make_openvswitch_device(int minor, char **fnp)
+dpif_linux_flow_dump_next(const struct dpif *dpif_ OVS_UNUSED, void *state_,
+ const struct nlattr **key, size_t *key_len,
+ const struct nlattr **actions, size_t *actions_len,
+ const struct dpif_flow_stats **stats)
{
- const char dirname[] = "/dev/net";
- int major;
- dev_t dev;
- struct stat s;
- char fn[128];
-
- *fnp = NULL;
+ struct dpif_linux_flow_state *state = state_;
+ struct ofpbuf buf;
+ int error;
- major = get_openvswitch_major();
- if (major < 0) {
- return -major;
- }
- dev = makedev(major, minor);
+ do {
+ ofpbuf_delete(state->buf);
+ state->buf = NULL;
- sprintf(fn, "%s/dp%d", dirname, minor);
- if (!stat(fn, &s)) {
- if (!S_ISCHR(s.st_mode)) {
- VLOG_WARN_RL(&error_rl, "%s is not a character device, fixing",
- fn);
- } else if (s.st_rdev != dev) {
- VLOG_WARN_RL(&error_rl,
- "%s is device %u:%u but should be %u:%u, fixing",
- fn, major(s.st_rdev), minor(s.st_rdev),
- major(dev), minor(dev));
- } else {
- goto success;
+ if (!nl_dump_next(&state->dump, &buf)) {
+ return EOF;
}
- if (unlink(fn)) {
- VLOG_WARN_RL(&error_rl, "%s: unlink failed (%s)",
- fn, strerror(errno));
- return errno;
+
+ error = dpif_linux_flow_from_ofpbuf(&state->flow, &buf);
+ if (error) {
+ return error;
}
- } else if (errno == ENOENT) {
- if (stat(dirname, &s)) {
- if (errno == ENOENT) {
- if (mkdir(dirname, 0755)) {
- VLOG_WARN_RL(&error_rl, "%s: mkdir failed (%s)",
- dirname, strerror(errno));
- return errno;
- }
- } else {
- VLOG_WARN_RL(&error_rl, "%s: stat failed (%s)",
- dirname, strerror(errno));
- return errno;
+
+ if (actions && !state->flow.actions) {
+ error = dpif_linux_flow_get__(dpif_, state->flow.key,
+ state->flow.key_len,
+ &state->flow, &state->buf);
+ if (error == ENOENT) {
+ VLOG_DBG("dumped flow disappeared on get");
+ } else if (error) {
+ VLOG_WARN("error fetching dumped flow: %s", strerror(error));
}
}
- } else {
- VLOG_WARN_RL(&error_rl, "%s: stat failed (%s)", fn, strerror(errno));
- return errno;
- }
+ } while (error);
- /* The device needs to be created. */
- if (mknod(fn, S_IFCHR | 0700, dev)) {
- VLOG_WARN_RL(&error_rl,
- "%s: creating character device %u:%u failed (%s)",
- fn, major(dev), minor(dev), strerror(errno));
- return errno;
+ if (actions) {
+ *actions = state->flow.actions;
+ *actions_len = state->flow.actions_len;
}
-
-success:
- *fnp = xstrdup(fn);
- return 0;
+ if (key) {
+ *key = state->flow.key;
+ *key_len = state->flow.key_len;
+ }
+ if (stats) {
+ dpif_linux_flow_get_stats(&state->flow, &state->stats);
+ *stats = &state->stats;
+ }
+ return error;
}
-/* Return the major device number of the Open vSwitch device. If it
- * cannot be determined, a negative errno is returned. */
static int
-get_openvswitch_major(void)
+dpif_linux_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
{
- static int openvswitch_major = -1;
- if (openvswitch_major < 0) {
- openvswitch_major = get_major("openvswitch");
- }
- return openvswitch_major;
+ struct dpif_linux_flow_state *state = state_;
+ int error = nl_dump_done(&state->dump);
+ ofpbuf_delete(state->buf);
+ free(state);
+ return error;
+}
+
+static void
+dpif_linux_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec,
+ struct ofpbuf *buf)
+{
+ struct ovs_header *k_exec;
+
+ ofpbuf_prealloc_tailroom(buf, (64
+ + d_exec->packet->size
+ + d_exec->key_len
+ + 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,
+ d_exec->packet->data, d_exec->packet->size);
+ nl_msg_put_unspec(buf, OVS_PACKET_ATTR_KEY, d_exec->key, d_exec->key_len);
+ nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS,
+ d_exec->actions, d_exec->actions_len);
}
static int
-get_major(const char *target)
+dpif_linux_execute__(int dp_ifindex, const struct dpif_execute *execute)
{
- const char fn[] = "/proc/devices";
- char line[128];
- FILE *file;
- int ln;
+ uint64_t request_stub[1024 / 8];
+ struct ofpbuf request;
+ int error;
- file = fopen(fn, "r");
- if (!file) {
- VLOG_ERR("opening %s failed (%s)", fn, strerror(errno));
- return -errno;
- }
+ ofpbuf_use_stub(&request, request_stub, sizeof request_stub);
+ dpif_linux_encode_execute(dp_ifindex, execute, &request);
+ error = nl_sock_transact(genl_sock, &request, NULL);
+ ofpbuf_uninit(&request);
+
+ return error;
+}
+
+static int
+dpif_linux_execute(struct dpif *dpif_, const struct dpif_execute *execute)
+{
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- for (ln = 1; fgets(line, sizeof line, file); ln++) {
- char name[64];
- int major;
+ return dpif_linux_execute__(dpif->dp_ifindex, execute);
+}
+
+#define MAX_OPS 50
+
+static void
+dpif_linux_operate__(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops)
+{
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- if (!strncmp(line, "Character", 9) || line[0] == '\0') {
- /* Nothing to do. */
- } else if (!strncmp(line, "Block", 5)) {
- /* We only want character devices, so skip the rest of the file. */
+ 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;
+
+ 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_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;
- } else if (sscanf(line, "%d %63s", &major, name)) {
- if (!strcmp(name, target)) {
- fclose(file);
- return major;
+
+ 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;
}
- } else {
- VLOG_WARN_ONCE("%s:%d: syntax error", fn, ln);
+ 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;
+
+ default:
+ NOT_REACHED();
}
}
- fclose(file);
+ for (i = 0; i < n_ops; i++) {
+ txnsp[i] = &auxes[i].txn;
+ }
+ nl_sock_transact_multiple(genl_sock, 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;
+
+ op->error = txn->error;
+
+ switch (op->type) {
+ case DPIF_OP_FLOW_PUT:
+ put = &op->u.flow_put;
+ if (!op->error && put->stats) {
+ 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 (!op->error && del->stats) {
+ struct dpif_linux_flow reply;
- VLOG_ERR("%s: %s major not found (is the module loaded?)", fn, target);
- return -ENODEV;
+ 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;
+
+ default:
+ 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)
+{
+ while (n_ops > 0) {
+ size_t chunk = MIN(n_ops, MAX_OPS);
+ dpif_linux_operate__(dpif, ops, chunk);
+ ops += chunk;
+ n_ops -= chunk;
+ }
+}
+
+static void
+set_upcall_pids(struct dpif *dpif_)
+{
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ struct dpif_port_dump port_dump;
+ struct dpif_port port;
+ int error;
+
+ DPIF_PORT_FOR_EACH (&port, &port_dump, &dpif->dpif) {
+ uint32_t upcall_pid = dpif_linux_port_get_pid(dpif_, port.port_no);
+ 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 = port.port_no;
+ vport_request.upcall_pid = &upcall_pid;
+ error = dpif_linux_vport_transact(&vport_request, NULL, NULL);
+ if (!error) {
+ VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32,
+ dpif_name(&dpif->dpif), vport_request.port_no,
+ upcall_pid);
+ } else {
+ VLOG_WARN_RL(&error_rl, "%s: failed to set upcall pid on port: %s",
+ dpif_name(&dpif->dpif), strerror(error));
+ }
+ }
}
static int
-finish_open(struct dpif *dpif_, const char *local_ifname)
+dpif_linux_recv_set(struct dpif *dpif_, bool enable)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
- dpif->local_ifname = xstrdup(local_ifname);
- dpif->local_ifindex = if_nametoindex(local_ifname);
- if (!dpif->local_ifindex) {
- int error = errno;
- dpif_uninit(dpif_, true);
- VLOG_WARN("could not get ifindex of %s device: %s",
- local_ifname, strerror(errno));
- return error;
+
+ if ((dpif->epoll_fd >= 0) == enable) {
+ return 0;
+ }
+
+ if (!enable) {
+ destroy_upcall_socks(dpif);
+ } else {
+ int i;
+ int error;
+
+ dpif->epoll_fd = epoll_create(N_UPCALL_SOCKS);
+ if (dpif->epoll_fd < 0) {
+ return errno;
+ }
+
+ for (i = 0; i < N_UPCALL_SOCKS; i++) {
+ struct epoll_event event;
+
+ error = nl_sock_create(NETLINK_GENERIC, &dpif->upcall_socks[i]);
+ if (error) {
+ destroy_upcall_socks(dpif);
+ return error;
+ }
+
+ memset(&event, 0, sizeof event);
+ event.events = EPOLLIN;
+ event.data.u32 = i;
+ if (epoll_ctl(dpif->epoll_fd, EPOLL_CTL_ADD,
+ nl_sock_fd(dpif->upcall_socks[i]), &event) < 0) {
+ error = errno;
+ destroy_upcall_socks(dpif);
+ return error;
+ }
+ }
+
+ dpif->ready_mask = 0;
}
+
+ set_upcall_pids(dpif_);
+
return 0;
}
static int
-create_minor(const char *name, int minor, struct dpif **dpifp)
+dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
+ uint32_t queue_id, uint32_t *priority)
{
- int error = open_minor(minor, dpifp);
- if (!error) {
- error = do_ioctl(*dpifp, ODP_DP_CREATE, name);
+ 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_U64, .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, buf->data, buf->size);
+
+ 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;
+ }
+
+ memset(upcall, 0, sizeof *upcall);
+ upcall->type = type;
+ upcall->packet = buf;
+ upcall->packet->data = (void *) nl_attr_get(a[OVS_PACKET_ATTR_PACKET]);
+ upcall->packet->size = nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]);
+ upcall->key = (void *) 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]
+ ? nl_attr_get_u64(a[OVS_PACKET_ATTR_USERDATA])
+ : 0);
+ *dp_ifindex = ovs_header->dp_ifindex;
+
+ return 0;
+}
+
+static int
+dpif_linux_recv(struct dpif *dpif_, struct dpif_upcall *upcall,
+ struct ofpbuf *buf)
+{
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ int read_tries = 0;
+
+ if (dpif->epoll_fd < 0) {
+ return EAGAIN;
+ }
+
+ if (!dpif->ready_mask) {
+ struct epoll_event events[N_UPCALL_SOCKS];
+ int retval;
+ int i;
+
+ do {
+ retval = epoll_wait(dpif->epoll_fd, events, N_UPCALL_SOCKS, 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)", strerror(errno));
+ }
+
+ for (i = 0; i < retval; i++) {
+ dpif->ready_mask |= 1u << events[i].data.u32;
+ }
+ }
+
+ while (dpif->ready_mask) {
+ int indx = ffs(dpif->ready_mask) - 1;
+ struct nl_sock *upcall_sock = dpif->upcall_socks[indx];
+
+ dpif->ready_mask &= ~(1u << indx);
+
+ for (;;) {
+ int dp_ifindex;
+ int error;
+
+ if (++read_tries > 50) {
+ return EAGAIN;
+ }
+
+ error = nl_sock_recv(upcall_sock, buf, false);
+ 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;
+ }
+ if (error) {
+ return error;
+ }
+ }
+ }
+
+ return EAGAIN;
+}
+
+static void
+dpif_linux_recv_wait(struct dpif *dpif_)
+{
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+
+ if (dpif->epoll_fd < 0) {
+ return;
+ }
+
+ poll_fd_wait(dpif->epoll_fd, POLLIN);
+}
+
+static void
+dpif_linux_recv_purge(struct dpif *dpif_)
+{
+ struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+ int i;
+
+ if (dpif->epoll_fd < 0) {
+ return;
+ }
+
+ for (i = 0; i < N_UPCALL_SOCKS; i++) {
+ nl_sock_drain(dpif->upcall_socks[i]);
+ }
+}
+
+const struct dpif_class dpif_linux_class = {
+ "system",
+ dpif_linux_enumerate,
+ dpif_linux_open,
+ dpif_linux_close,
+ dpif_linux_destroy,
+ dpif_linux_run,
+ dpif_linux_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_get_max_ports,
+ 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_get,
+ dpif_linux_flow_put,
+ dpif_linux_flow_del,
+ dpif_linux_flow_flush,
+ dpif_linux_flow_dump_start,
+ dpif_linux_flow_dump_next,
+ dpif_linux_flow_dump_done,
+ dpif_linux_execute,
+ dpif_linux_operate,
+ dpif_linux_recv_set,
+ dpif_linux_queue_to_priority,
+ dpif_linux_recv,
+ dpif_linux_recv_wait,
+ dpif_linux_recv_purge,
+};
+\f
+static int
+dpif_linux_init(void)
+{
+ static int error = -1;
+
+ if (error < 0) {
+ unsigned int ovs_vport_mcgroup;
+
+ 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 = finish_open(*dpifp, name);
- } else {
- dpif_uninit(*dpifp, true);
+ 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_sock_create(NETLINK_GENERIC, &genl_sock);
+ }
+ if (!error) {
+ error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP,
+ &ovs_vport_mcgroup,
+ OVS_VPORT_MCGROUP_FALLBACK_ID);
+ }
+ if (!error) {
+ static struct dpif_linux_vport vport;
+ nln = nln_create(NETLINK_GENERIC, ovs_vport_mcgroup,
+ dpif_linux_nln_parse, &vport);
}
}
+
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, strerror(error));
+ }
+
+ return reply.type == OVS_VPORT_TYPE_INTERNAL;
+}
+
+int
+dpif_linux_vport_send(int dp_ifindex, uint32_t port_no,
+ const void *data, size_t size)
+{
+ struct ofpbuf actions, key, packet;
+ struct odputil_keybuf keybuf;
+ struct dpif_execute execute;
+ struct flow flow;
+ uint64_t action;
+
+ ofpbuf_use_const(&packet, data, size);
+ flow_extract(&packet, 0, htonll(0), 0, &flow);
+
+ ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
+ odp_flow_key_from_flow(&key, &flow);
+
+ ofpbuf_use_stack(&actions, &action, sizeof action);
+ nl_msg_put_u32(&actions, OVS_ACTION_ATTR_OUTPUT, port_no);
+
+ execute.key = key.data;
+ execute.key_len = key.size;
+ execute.actions = actions.data;
+ execute.actions_len = actions.size;
+ execute.packet = &packet;
+ return dpif_linux_execute__(dp_ifindex, &execute);
+}
+
+static bool
+dpif_linux_nln_parse(struct ofpbuf *buf, void *vport_)
+{
+ struct dpif_linux_vport *vport = vport_;
+ return dpif_linux_vport_from_ofpbuf(vport, buf) == 0;
+}
+
+static void
+dpif_linux_port_changed(const void *vport_, void *dpif_)
+{
+ const struct dpif_linux_vport *vport = vport_;
+ struct dpif_linux *dpif = dpif_;
+
+ if (vport) {
+ 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);
+ sset_add(&dpif->changed_ports, vport->name);
+ }
+ } else {
+ dpif->change_error = true;
+ }
+}
+\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
-open_minor(int minor, struct dpif **dpifp)
+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_U32 },
+ [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats),
+ .optional = true },
+ [OVS_VPORT_ATTR_ADDRESS] = { .type = NL_A_UNSPEC,
+ .min_len = ETH_ADDR_LEN,
+ .max_len = ETH_ADDR_LEN,
+ .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, buf->data, buf->size);
+ 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_u32(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->upcall_pid = 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_ADDRESS]) {
+ vport->address = nl_attr_get(a[OVS_VPORT_ATTR_ADDRESS]);
+ }
+ 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 != UINT32_MAX) {
+ nl_msg_put_u32(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_pid) {
+ nl_msg_put_u32(buf, OVS_VPORT_ATTR_UPCALL_PID, *vport->upcall_pid);
+ }
+
+ if (vport->stats) {
+ nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS,
+ vport->stats, sizeof *vport->stats);
+ }
+
+ if (vport->address) {
+ nl_msg_put_unspec(buf, OVS_VPORT_ATTR_ADDRESS,
+ vport->address, ETH_ADDR_LEN);
+ }
+
+ 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 = UINT32_MAX;
+}
+
+/* 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;
- char *fn;
- int fd;
- error = make_openvswitch_device(minor, &fn);
+ assert((reply != NULL) == (bufp != NULL));
+
+ error = dpif_linux_init();
if (error) {
+ if (reply) {
+ *bufp = NULL;
+ dpif_linux_vport_init(reply);
+ }
return error;
}
- fd = open(fn, O_RDONLY | O_NONBLOCK);
- if (fd >= 0) {
- struct dpif_linux *dpif = xmalloc(sizeof *dpif);
- error = rtnetlink_notifier_register(&dpif->port_notifier,
- dpif_linux_port_changed, dpif);
+ request_buf = ofpbuf_new(1024);
+ dpif_linux_vport_to_ofpbuf(request, request_buf);
+ error = nl_sock_transact(genl_sock, request_buf, bufp);
+ ofpbuf_delete(request_buf);
+
+ if (reply) {
if (!error) {
- char *name;
-
- name = xasprintf("dp%d", minor);
- dpif_init(&dpif->dpif, &dpif_linux_class, name, minor, minor);
- free(name);
-
- dpif->fd = fd;
- dpif->local_ifname = NULL;
- dpif->minor = minor;
- dpif->local_ifindex = 0;
- shash_init(&dpif->changed_ports);
- dpif->change_error = false;
- *dpifp = &dpif->dpif;
- } else {
- free(dpif);
+ error = dpif_linux_vport_from_ofpbuf(reply, *bufp);
}
- } else {
- error = errno;
- VLOG_WARN("%s: open failed (%s)", fn, strerror(error));
+ 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 },
+ };
+
+ 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, buf->data, buf->size);
+ 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;
}
- free(fn);
+ 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]) {
+ /* Can't use structure assignment because Netlink doesn't ensure
+ * sufficient alignment for 64-bit members. */
+ memcpy(&dp->stats, nl_attr_get(a[OVS_DP_ATTR_STATS]),
+ sizeof dp->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);
+ }
+
+ /* 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, genl_sock, 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;
+
+ assert((reply != NULL) == (bufp != NULL));
+
+ request_buf = ofpbuf_new(1024);
+ dpif_linux_dp_to_ofpbuf(request, request_buf);
+ error = nl_sock_transact(genl_sock, request_buf, bufp);
+ ofpbuf_delete(request_buf);
+
+ if (reply) {
+ if (!error) {
+ error = dpif_linux_dp_from_ofpbuf(reply, *bufp);
+ }
+ if (error) {
+ dpif_linux_dp_init(reply);
+ 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_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, buf->data, buf->size);
+ 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_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_port_changed(const struct rtnetlink_change *change, void *dpif_)
+dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow,
+ struct ofpbuf *buf)
{
- struct dpif_linux *dpif = dpif_;
+ 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->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. */
+ assert(!flow->stats);
+ assert(!flow->tcp_flags);
+ 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;
+
+ assert((reply != NULL) == (bufp != NULL));
+
+ if (reply) {
+ request->nlmsg_flags |= NLM_F_ECHO;
+ }
- if (change) {
- if (change->master_ifindex == dpif->local_ifindex
- && (change->nlmsg_type == RTM_NEWLINK
- || change->nlmsg_type == RTM_DELLINK))
- {
- /* Our datapath changed, either adding a new port or deleting an
- * existing one. */
- shash_add_once(&dpif->changed_ports, change->ifname, NULL);
+ request_buf = ofpbuf_new(1024);
+ dpif_linux_flow_to_ofpbuf(request, request_buf);
+ error = nl_sock_transact(genl_sock, 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_unaligned_u64(&flow->stats->n_packets);
+ stats->n_bytes = get_unaligned_u64(&flow->stats->n_bytes);
} else {
- dpif->change_error = true;
+ 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;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff