X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=vswitchd%2Fovs-brcompatd.c;h=bfa13ca26b7476c56ea8e3fa49c3bed641d58837;hb=9ed3ba29b36ab99b75d6519660f58d6f5f9bd190;hp=93d9469bda82836a6bcddda132de540c0fe9a984;hpb=064af42167bf4fc9aaea2702d80ce08074b889c0;p=openvswitch
diff --git a/vswitchd/ovs-brcompatd.c b/vswitchd/ovs-brcompatd.c
index 93d9469b..bfa13ca2 100644
--- a/vswitchd/ovs-brcompatd.c
+++ b/vswitchd/ovs-brcompatd.c
@@ -1,22 +1,21 @@
-/* Copyright (c) 2008, 2009 Nicira Networks
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
+/* Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * 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:
*
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see .
+ * 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
+#include
#include
#include
#include
@@ -30,66 +29,53 @@
#include
#include
#include
+#include
#include
#include
-#include "cfg.h"
#include "command-line.h"
#include "coverage.h"
#include "daemon.h"
#include "dirs.h"
-#include "dpif.h"
+#include "dynamic-string.h"
#include "fatal-signal.h"
-#include "fault.h"
+#include "json.h"
#include "leak-checker.h"
#include "netdev.h"
#include "netlink.h"
+#include "netlink-notifier.h"
+#include "netlink-socket.h"
#include "ofpbuf.h"
#include "openvswitch/brcompat-netlink.h"
+#include "packets.h"
#include "poll-loop.h"
#include "process.h"
+#include "rtnetlink-link.h"
#include "signals.h"
+#include "sset.h"
#include "svec.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
-
#include "vlog.h"
-#define THIS_MODULE VLM_brcompatd
+VLOG_DEFINE_THIS_MODULE(brcompatd);
/* xxx Just hangs if datapath is rmmod/insmod. Learn to reconnect? */
-/* Actions to modify bridge compatibility configuration. */
-enum bmc_action {
- BMC_ADD_DP,
- BMC_DEL_DP,
- BMC_ADD_PORT,
- BMC_DEL_PORT
-};
-
static void parse_options(int argc, char *argv[]);
static void usage(void) NO_RETURN;
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 60);
-/* Maximum number of milliseconds to wait for the config file to be
- * unlocked. If set to zero, no waiting will occur. */
-static int lock_timeout = 500;
-
-/* Maximum number of milliseconds to wait before pruning port entries that
- * no longer exist. If set to zero, ports are never pruned. */
-static int prune_timeout = 5000;
+/* --appctl: Absolute path to ovs-appctl. */
+static char *appctl_program;
-/* Config file shared with ovs-vswitchd (usually ovs-vswitchd.conf). */
-static char *config_file;
+/* --vsctl: Absolute path to ovs-vsctl. */
+static char *vsctl_program;
-/* Command to run (via system()) to reload the ovs-vswitchd configuration
- * file. */
-static char *reload_command;
-
-/* Netlink socket to listen for interface changes. */
-static struct nl_sock *rtnl_sock;
+/* Options that we should generally pass to ovs-vsctl. */
+#define VSCTL_OPTIONS "--timeout=5", "-vANY:console:WARN"
/* Netlink socket to bridge compatibility kernel module. */
static struct nl_sock *brc_sock;
@@ -101,10 +87,90 @@ static const struct nl_policy brc_multicast_policy[] = {
[BRC_GENL_A_MC_GROUP] = {.type = NL_A_U32 }
};
-static const struct nl_policy rtnlgrp_link_policy[] = {
- [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
- [IFLA_MASTER] = { .type = NL_A_U32, .optional = true },
-};
+static char *
+capture_vsctl_valist(const char *arg0, va_list args)
+{
+ char *stdout_log, *stderr_log;
+ enum vlog_level log_level;
+ struct svec argv;
+ int status;
+ char *msg;
+
+ /* Compose arguments. */
+ svec_init(&argv);
+ svec_add(&argv, arg0);
+ for (;;) {
+ const char *arg = va_arg(args, const char *);
+ if (!arg) {
+ break;
+ }
+ svec_add(&argv, arg);
+ }
+ svec_terminate(&argv);
+
+ /* Run process. */
+ if (process_run_capture(argv.names, &stdout_log, &stderr_log, SIZE_MAX,
+ &status)) {
+ svec_destroy(&argv);
+ return NULL;
+ }
+
+ /* Log results. */
+ if (WIFEXITED(status)) {
+ int code = WEXITSTATUS(status);
+ log_level = code == 0 ? VLL_DBG : code == 1 ? VLL_WARN : VLL_ERR;
+ } else {
+ log_level = VLL_ERR;
+ }
+ msg = process_status_msg(status);
+ VLOG(log_level, "ovs-vsctl exited (%s)", msg);
+ if (stdout_log && *stdout_log) {
+ VLOG(log_level, "ovs-vsctl wrote to stdout:\n%s\n", stdout_log);
+ }
+ if (stderr_log && *stderr_log) {
+ VLOG(log_level, "ovs-vsctl wrote to stderr:\n%s\n", stderr_log);
+ }
+ free(msg);
+
+ svec_destroy(&argv);
+
+ free(stderr_log);
+ if (WIFEXITED(status) && !WEXITSTATUS(status)) {
+ return stdout_log;
+ } else {
+ free(stdout_log);
+ return NULL;
+ }
+}
+
+static char * SENTINEL(0)
+capture_vsctl(const char *arg0, ...)
+{
+ char *stdout_log;
+ va_list args;
+
+ va_start(args, arg0);
+ stdout_log = capture_vsctl_valist(arg0, args);
+ va_end(args);
+
+ return stdout_log;
+}
+
+static bool SENTINEL(0)
+run_vsctl(const char *arg0, ...)
+{
+ char *stdout_log;
+ va_list args;
+ bool ok;
+
+ va_start(args, arg0);
+ stdout_log = capture_vsctl_valist(arg0, args);
+ va_end(args);
+
+ ok = stdout_log != NULL;
+ free(stdout_log);
+ return ok;
+}
static int
lookup_brc_multicast_group(int *multicast_group)
@@ -114,12 +180,12 @@ lookup_brc_multicast_group(int *multicast_group)
struct nlattr *attrs[ARRAY_SIZE(brc_multicast_policy)];
int retval;
- retval = nl_sock_create(NETLINK_GENERIC, 0, 0, 0, &sock);
+ retval = nl_sock_create(NETLINK_GENERIC, &sock);
if (retval) {
return retval;
}
ofpbuf_init(&request, 0);
- nl_msg_put_genlmsghdr(&request, sock, 0, brc_family,
+ nl_msg_put_genlmsghdr(&request, 0, brc_family,
NLM_F_REQUEST, BRC_GENL_C_QUERY_MC, 1);
retval = nl_sock_transact(sock, &request, &reply);
ofpbuf_uninit(&request);
@@ -159,325 +225,473 @@ brc_open(struct nl_sock **sock)
return retval;
}
- retval = nl_sock_create(NETLINK_GENERIC, multicast_group, 0, 0, sock);
+ retval = nl_sock_create(NETLINK_GENERIC, sock);
if (retval) {
return retval;
}
- return 0;
+ retval = nl_sock_join_mcgroup(*sock, multicast_group);
+ if (retval) {
+ nl_sock_destroy(*sock);
+ *sock = NULL;
+ }
+ return retval;
}
static const struct nl_policy brc_dp_policy[] = {
[BRC_GENL_A_DP_NAME] = { .type = NL_A_STRING },
};
-static bool
-bridge_exists(const char *name)
-{
- return cfg_has_section("bridge.%s", name);
-}
-
static int
-rewrite_and_reload_config(void)
+parse_command(struct ofpbuf *buffer, uint32_t *seq, const char **br_name,
+ const char **port_name, uint64_t *count, uint64_t *skip)
{
- if (cfg_is_dirty()) {
- int error1 = cfg_write();
- int error2 = cfg_read();
- long long int reload_start = time_msec();
- int error3 = system(reload_command);
- long long int elapsed = time_msec() - reload_start;
- COVERAGE_INC(brcompatd_reload);
- if (elapsed > 0) {
- VLOG_INFO("reload command executed in %lld ms", elapsed);
- }
- if (error3 == -1) {
- VLOG_ERR("failed to execute reload command: %s", strerror(errno));
- } else if (error3 != 0) {
- char *msg = process_status_msg(error3);
- VLOG_ERR("reload command exited with error (%s)", msg);
- free(msg);
- }
- return error1 ? error1 : error2 ? error2 : error3 ? ECHILD : 0;
+ static const struct nl_policy policy[] = {
+ [BRC_GENL_A_DP_NAME] = { .type = NL_A_STRING, .optional = true },
+ [BRC_GENL_A_PORT_NAME] = { .type = NL_A_STRING, .optional = true },
+ [BRC_GENL_A_FDB_COUNT] = { .type = NL_A_U64, .optional = true },
+ [BRC_GENL_A_FDB_SKIP] = { .type = NL_A_U64, .optional = true },
+ };
+ struct nlattr *attrs[ARRAY_SIZE(policy)];
+
+ if (!nl_policy_parse(buffer, NLMSG_HDRLEN + GENL_HDRLEN, policy,
+ attrs, ARRAY_SIZE(policy))
+ || (br_name && !attrs[BRC_GENL_A_DP_NAME])
+ || (port_name && !attrs[BRC_GENL_A_PORT_NAME])
+ || (count && !attrs[BRC_GENL_A_FDB_COUNT])
+ || (skip && !attrs[BRC_GENL_A_FDB_SKIP])) {
+ return EINVAL;
+ }
+
+ *seq = ((struct nlmsghdr *) buffer->data)->nlmsg_seq;
+ if (br_name) {
+ *br_name = nl_attr_get_string(attrs[BRC_GENL_A_DP_NAME]);
+ }
+ if (port_name) {
+ *port_name = nl_attr_get_string(attrs[BRC_GENL_A_PORT_NAME]);
+ }
+ if (count) {
+ *count = nl_attr_get_u64(attrs[BRC_GENL_A_FDB_COUNT]);
+ }
+ if (skip) {
+ *skip = nl_attr_get_u64(attrs[BRC_GENL_A_FDB_SKIP]);
}
return 0;
}
-/* Go through the configuration file and remove any ports that no longer
- * exist associated with a bridge. */
-static void
-prune_ports(void)
+/* Composes and returns a reply to a request made by the datapath with Netlink
+ * sequence number 'seq' and error code 'error'. The caller may add additional
+ * attributes to the message, then it may send it with send_reply(). */
+static struct ofpbuf *
+compose_reply(uint32_t seq, int error)
{
- int i, j;
- int error;
- struct svec bridges, delete;
+ struct ofpbuf *reply = ofpbuf_new(4096);
+ nl_msg_put_genlmsghdr(reply, 32, brc_family, NLM_F_REQUEST,
+ BRC_GENL_C_DP_RESULT, 1);
+ ((struct nlmsghdr *) reply->data)->nlmsg_seq = seq;
+ nl_msg_put_u32(reply, BRC_GENL_A_ERR_CODE, error);
+ return reply;
+}
- if (cfg_lock(NULL, 0)) {
- /* Couldn't lock config file. */
- return;
+/* Sends 'reply' to the datapath and frees it. */
+static void
+send_reply(struct ofpbuf *reply)
+{
+ int retval = nl_sock_send(brc_sock, reply, false);
+ if (retval) {
+ VLOG_WARN_RL(&rl, "replying to brcompat request: %s",
+ strerror(retval));
}
+ ofpbuf_delete(reply);
+}
- svec_init(&bridges);
- svec_init(&delete);
- cfg_get_subsections(&bridges, "bridge");
- for (i=0; i, but
+ * the 'port_hi' member was only introduced in Linux 2.6.26 and so systems
+ * with old header files won't have it. */
+ struct __fdb_entry {
+ __u8 mac_addr[6];
+ __u8 port_no;
+ __u8 is_local;
+ __u32 ageing_timer_value;
+ __u8 port_hi;
+ __u8 pad0;
+ __u16 unused;
};
- struct nlattr *attrs[ARRAY_SIZE(policy)];
- if (!nl_policy_parse(buffer, NLMSG_HDRLEN + GENL_HDRLEN, policy,
- attrs, ARRAY_SIZE(policy))
- || (port_name && !attrs[BRC_GENL_A_PORT_NAME])) {
- return EINVAL;
+ struct mac {
+ uint8_t addr[6];
+ };
+ struct mac *local_macs;
+ int n_local_macs;
+ int i;
+
+ /* Impedance matching between the vswitchd and Linux kernel notions of what
+ * a bridge is. The kernel only handles a single VLAN per bridge, but
+ * vswitchd can deal with all the VLANs on a single bridge. We have to
+ * pretend that the former is the case even though the latter is the
+ * implementation. */
+ const char *linux_name; /* Name used by brctl. */
+ int br_vlan; /* VLAN tag. */
+ struct sset ifaces;
+
+ struct ofpbuf query_data;
+ const char *iface_name;
+ struct ofpbuf *reply;
+ uint64_t count, skip;
+ char *br_name;
+ char *output;
+ char *save_ptr;
+ uint32_t seq;
+ int error;
+
+ /* Parse the command received from brcompat_mod. */
+ error = parse_command(buffer, &seq, &linux_name, NULL, &count, &skip);
+ if (error) {
+ return error;
}
- *seq = ((struct nlmsghdr *) buffer->data)->nlmsg_seq;
- *br_name = nl_attr_get_string(attrs[BRC_GENL_A_DP_NAME]);
- if (port_name) {
- *port_name = nl_attr_get_string(attrs[BRC_GENL_A_PORT_NAME]);
+ /* Figure out vswitchd bridge and VLAN. */
+ br_name = linux_bridge_to_ovs_bridge(linux_name, &br_vlan);
+ if (!br_name) {
+ error = EINVAL;
+ send_simple_reply(seq, error);
+ return error;
+ }
+
+ /* Fetch the forwarding database using ovs-appctl. */
+ output = capture_vsctl(appctl_program, "fdb/show", br_name,
+ (char *) NULL);
+ if (!output) {
+ error = ECHILD;
+ send_simple_reply(seq, error);
+ return error;
+ }
+
+ /* Fetch the MAC address for each interface on the bridge, so that we can
+ * fill in the is_local field in the response. */
+ sset_init(&ifaces);
+ get_bridge_ifaces(linux_name, &ifaces);
+ local_macs = xmalloc(sset_count(&ifaces) * sizeof *local_macs);
+ n_local_macs = 0;
+ SSET_FOR_EACH (iface_name, &ifaces) {
+ struct mac *mac = &local_macs[n_local_macs];
+ struct netdev *netdev;
+
+ error = netdev_open(iface_name, "system", &netdev);
+ if (!error) {
+ if (!netdev_get_etheraddr(netdev, mac->addr)) {
+ n_local_macs++;
+ }
+ netdev_close(netdev);
+ }
+ }
+ sset_destroy(&ifaces);
+
+ /* Parse the response from ovs-appctl and convert it to binary format to
+ * pass back to the kernel. */
+ ofpbuf_init(&query_data, sizeof(struct __fdb_entry) * 8);
+ save_ptr = NULL;
+ strtok_r(output, "\n", &save_ptr); /* Skip header line. */
+ while (count > 0) {
+ struct __fdb_entry *entry;
+ int port, vlan, age;
+ uint8_t mac[ETH_ADDR_LEN];
+ char *line;
+ bool is_local;
+
+ line = strtok_r(NULL, "\n", &save_ptr);
+ if (!line) {
+ break;
+ }
+
+ if (sscanf(line, "%d %d "ETH_ADDR_SCAN_FMT" %d",
+ &port, &vlan, ETH_ADDR_SCAN_ARGS(mac), &age)
+ != 2 + ETH_ADDR_SCAN_COUNT + 1) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+ VLOG_INFO_RL(&rl, "fdb/show output has invalid format: %s", line);
+ continue;
+ }
+
+ if (vlan != br_vlan) {
+ continue;
+ }
+
+ if (skip > 0) {
+ skip--;
+ continue;
+ }
+
+ /* Is this the MAC address of an interface on the bridge? */
+ is_local = false;
+ for (i = 0; i < n_local_macs; i++) {
+ if (eth_addr_equals(local_macs[i].addr, mac)) {
+ is_local = true;
+ break;
+ }
+ }
+
+ entry = ofpbuf_put_uninit(&query_data, sizeof *entry);
+ memcpy(entry->mac_addr, mac, ETH_ADDR_LEN);
+ entry->port_no = port & 0xff;
+ entry->is_local = is_local;
+ entry->ageing_timer_value = age * HZ;
+ entry->port_hi = (port & 0xff00) >> 8;
+ entry->pad0 = 0;
+ entry->unused = 0;
+ count--;
}
+ free(output);
+
+ /* Compose and send reply to datapath. */
+ reply = compose_reply(seq, 0);
+ nl_msg_put_unspec(reply, BRC_GENL_A_FDB_DATA,
+ query_data.data, query_data.size);
+ send_reply(reply);
+
+ /* Free memory. */
+ ofpbuf_uninit(&query_data);
+ free(local_macs);
+
return 0;
}
static void
-send_reply(uint32_t seq, int error)
+send_ifindex_reply(uint32_t seq, char *output)
{
- struct ofpbuf msg;
- int retval;
-
- /* Compose reply. */
- ofpbuf_init(&msg, 0);
- nl_msg_put_genlmsghdr(&msg, brc_sock, 32, brc_family, NLM_F_REQUEST,
- BRC_GENL_C_DP_RESULT, 1);
- ((struct nlmsghdr *) msg.data)->nlmsg_seq = seq;
- nl_msg_put_u32(&msg, BRC_GENL_A_ERR_CODE, error);
+ size_t allocated_indices;
+ char *save_ptr = NULL;
+ struct ofpbuf *reply;
+ const char *iface;
+ size_t n_indices;
+ int *indices;
+
+ indices = NULL;
+ n_indices = allocated_indices = 0;
+ for (iface = strtok_r(output, " \t\r\n", &save_ptr); iface;
+ iface = strtok_r(NULL, " \t\r\n", &save_ptr)) {
+ int ifindex;
+
+ if (n_indices >= allocated_indices) {
+ indices = x2nrealloc(indices, &allocated_indices, sizeof *indices);
+ }
- /* Send reply. */
- retval = nl_sock_send(brc_sock, &msg, false);
- if (retval) {
- VLOG_WARN_RL(&rl, "replying to brcompat request: %s",
- strerror(retval));
+ ifindex = if_nametoindex(iface);
+ if (ifindex) {
+ indices[n_indices++] = ifindex;
+ }
}
- ofpbuf_uninit(&msg);
+
+ /* Compose and send reply. */
+ reply = compose_reply(seq, 0);
+ nl_msg_put_unspec(reply, BRC_GENL_A_IFINDEXES,
+ indices, n_indices * sizeof *indices);
+ send_reply(reply);
+
+ /* Free memory. */
+ free(indices);
}
static int
-handle_bridge_cmd(struct ofpbuf *buffer, bool add)
+handle_get_bridges_cmd(struct ofpbuf *buffer)
{
- const char *br_name;
+ char *output;
uint32_t seq;
int error;
- error = parse_command(buffer, &seq, &br_name, NULL);
- if (!error) {
- error = add ? add_bridge(br_name) : del_bridge(br_name);
- if (!error) {
- error = rewrite_and_reload_config();
- }
- send_reply(seq, error);
+ /* Parse Netlink command.
+ *
+ * The command doesn't actually have any arguments, but we need the
+ * sequence number to send the reply. */
+ error = parse_command(buffer, &seq, NULL, NULL, NULL, NULL);
+ if (error) {
+ return error;
}
- return error;
-}
-static const struct nl_policy brc_port_policy[] = {
- [BRC_GENL_A_DP_NAME] = { .type = NL_A_STRING },
- [BRC_GENL_A_PORT_NAME] = { .type = NL_A_STRING },
-};
+ output = capture_vsctl(vsctl_program, VSCTL_OPTIONS, "list-br", (char *) NULL);
+ if (!output) {
+ return ENODEV;
+ }
-static void
-del_port(const char *br_name, const char *port_name)
-{
- cfg_del_entry("bridge.%s.port=%s", br_name, port_name);
- cfg_del_match("bonding.*.slave=%s", port_name);
- cfg_del_match("vlan.%s.*", port_name);
+ send_ifindex_reply(seq, output);
+ free(output);
+ return 0;
}
static int
-handle_port_cmd(struct ofpbuf *buffer, bool add)
+handle_get_ports_cmd(struct ofpbuf *buffer)
{
- const char *cmd_name = add ? "add-if" : "del-if";
- const char *br_name, *port_name;
+ const char *linux_name;
uint32_t seq;
+ char *output;
int error;
- error = parse_command(buffer, &seq, &br_name, &port_name);
- if (!error) {
- if (!bridge_exists(br_name)) {
- VLOG_WARN("%s %s %s: no bridge named %s",
- cmd_name, br_name, port_name, br_name);
- error = EINVAL;
- } else if (!netdev_exists(port_name)) {
- VLOG_WARN("%s %s %s: no network device named %s",
- cmd_name, br_name, port_name, port_name);
- error = EINVAL;
- } else {
- if (add) {
- cfg_add_entry("bridge.%s.port=%s", br_name, port_name);
- } else {
- del_port(br_name, port_name);
+ /* Parse Netlink command. */
+ error = parse_command(buffer, &seq, &linux_name, NULL, NULL, NULL);
+ if (error) {
+ return error;
+ }
+
+ output = capture_vsctl(vsctl_program, VSCTL_OPTIONS, "list-ports", linux_name,
+ (char *) NULL);
+ if (!output) {
+ return ENODEV;
+ }
+
+ send_ifindex_reply(seq, output);
+ free(output);
+ return 0;
+}
+
+static struct ofpbuf *
+brc_recv_update__(void)
+{
+ for (;;) {
+ struct ofpbuf *buffer;
+ int retval;
+
+ retval = nl_sock_recv(brc_sock, &buffer, false);
+ switch (retval) {
+ case 0:
+ if (nl_msg_nlmsgerr(buffer, NULL)
+ || nl_msg_nlmsghdr(buffer)->nlmsg_type == NLMSG_DONE) {
+ break;
}
- VLOG_INFO("%s %s %s: success", cmd_name, br_name, port_name);
- error = rewrite_and_reload_config();
+ return buffer;
+
+ case ENOBUFS:
+ break;
+
+ case EAGAIN:
+ return NULL;
+
+ default:
+ VLOG_WARN_RL(&rl, "brc_recv_update: %s", strerror(retval));
+ return NULL;
}
- send_reply(seq, error);
+ ofpbuf_delete(buffer);
}
-
- return error;
}
-static int
+static void
brc_recv_update(void)
{
- int retval;
struct ofpbuf *buffer;
struct genlmsghdr *genlmsghdr;
-
- buffer = NULL;
- do {
- ofpbuf_delete(buffer);
- retval = nl_sock_recv(brc_sock, &buffer, false);
- } while (retval == ENOBUFS
- || (!retval
- && (nl_msg_nlmsgerr(buffer, NULL)
- || nl_msg_nlmsghdr(buffer)->nlmsg_type == NLMSG_DONE)));
- if (retval) {
- if (retval != EAGAIN) {
- VLOG_WARN_RL(&rl, "brc_recv_update: %s", strerror(retval));
- }
- return retval;
+ buffer = brc_recv_update__();
+ if (!buffer) {
+ return;
}
genlmsghdr = nl_msg_genlmsghdr(buffer);
@@ -492,167 +706,144 @@ brc_recv_update(void)
goto error;
}
- if (cfg_lock(NULL, lock_timeout)) {
- /* Couldn't lock config file. */
- retval = EAGAIN;
- goto error;
- }
+ /* Service all pending network device notifications before executing the
+ * command. This is very important to avoid a race in a scenario like the
+ * following, which is what happens with XenServer Tools version 5.0.0
+ * during boot of a Windows VM:
+ *
+ * 1. Create tap1.0 and vif1.0.
+ * 2. Delete tap1.0.
+ * 3. Delete vif1.0.
+ * 4. Re-create vif1.0.
+ *
+ * We must process the network device notification from step 3 before we
+ * process the brctl command from step 4. If we process them in the
+ * reverse order, then step 4 completes as a no-op but step 3 then deletes
+ * the port that was just added.
+ *
+ * (XenServer Tools 5.5.0 does not exhibit this behavior, and neither does
+ * a VM without Tools installed at all.)
+ */
+ rtnetlink_link_notifier_run();
switch (genlmsghdr->cmd) {
case BRC_GENL_C_DP_ADD:
- retval = handle_bridge_cmd(buffer, true);
+ handle_bridge_cmd(buffer, true);
break;
case BRC_GENL_C_DP_DEL:
- retval = handle_bridge_cmd(buffer, false);
+ handle_bridge_cmd(buffer, false);
break;
case BRC_GENL_C_PORT_ADD:
- retval = handle_port_cmd(buffer, true);
+ handle_port_cmd(buffer, true);
break;
case BRC_GENL_C_PORT_DEL:
- retval = handle_port_cmd(buffer, false);
+ handle_port_cmd(buffer, false);
+ break;
+
+ case BRC_GENL_C_FDB_QUERY:
+ handle_fdb_query_cmd(buffer);
+ break;
+
+ case BRC_GENL_C_GET_BRIDGES:
+ handle_get_bridges_cmd(buffer);
+ break;
+
+ case BRC_GENL_C_GET_PORTS:
+ handle_get_ports_cmd(buffer);
break;
default:
- retval = EPROTO;
+ VLOG_WARN_RL(&rl, "received unknown brc netlink command: %d\n",
+ genlmsghdr->cmd);
+ break;
}
- cfg_unlock();
-
error:
ofpbuf_delete(buffer);
- return retval;
}
-/* Check for interface configuration changes announced through RTNL. */
static void
-rtnl_recv_update(void)
+netdev_changed_cb(const struct rtnetlink_link_change *change,
+ void *aux OVS_UNUSED)
{
- struct ofpbuf *buf;
+ char br_name[IFNAMSIZ];
+ const char *port_name;
- int error = nl_sock_recv(rtnl_sock, &buf, false);
- if (error == EAGAIN) {
- /* Nothing to do. */
- } else if (error == ENOBUFS) {
+ if (!change) {
VLOG_WARN_RL(&rl, "network monitor socket overflowed");
- } else if (error) {
- VLOG_WARN_RL(&rl, "error on network monitor socket: %s",
- strerror(error));
- } else {
- struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
- struct nlmsghdr *nlh;
- struct ifinfomsg *iim;
-
- nlh = ofpbuf_at(buf, 0, NLMSG_HDRLEN);
- iim = ofpbuf_at(buf, NLMSG_HDRLEN, sizeof *iim);
- if (!iim) {
- VLOG_WARN_RL(&rl, "received bad rtnl message (no ifinfomsg)");
- ofpbuf_delete(buf);
- return;
- }
-
- if (!nl_policy_parse(buf, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
- rtnlgrp_link_policy,
- attrs, ARRAY_SIZE(rtnlgrp_link_policy))) {
- VLOG_WARN_RL(&rl,"received bad rtnl message (policy)");
- ofpbuf_delete(buf);
- return;
- }
- if (nlh->nlmsg_type == RTM_DELLINK && attrs[IFLA_MASTER]) {
- const char *port_name = nl_attr_get_string(attrs[IFLA_IFNAME]);
- char br_name[IFNAMSIZ];
- uint32_t br_idx = nl_attr_get_u32(attrs[IFLA_MASTER]);
- struct svec ports;
-
- if (!if_indextoname(br_idx, br_name)) {
- ofpbuf_delete(buf);
- return;
- }
+ return;
+ }
- if (cfg_lock(NULL, lock_timeout)) {
- /* Couldn't lock config file. */
- /* xxx this should try again and print error msg. */
- ofpbuf_delete(buf);
- return;
- }
+ if (change->nlmsg_type != RTM_DELLINK || !change->master_ifindex) {
+ return;
+ }
- svec_init(&ports);
- cfg_get_all_keys(&ports, "bridge.%s.port", br_name);
- svec_sort(&ports);
- if (svec_contains(&ports, port_name)) {
- del_port(br_name, port_name);
- rewrite_and_reload_config();
- }
- cfg_unlock();
- }
- ofpbuf_delete(buf);
+ port_name = change->ifname;
+ if (!if_indextoname(change->master_ifindex, br_name)) {
+ return;
}
+
+ VLOG_INFO("network device %s destroyed, removing from bridge %s",
+ port_name, br_name);
+
+ run_vsctl(vsctl_program, VSCTL_OPTIONS,
+ "--", "--if-exists", "del-port", port_name,
+ "--", "comment", "ovs-brcompatd:", port_name, "disappeared",
+ (char *) NULL);
}
int
main(int argc, char *argv[])
{
+ extern struct vlog_module VLM_reconnect;
+ struct nln_notifier link_notifier;
struct unixctl_server *unixctl;
int retval;
+ proctitle_init(argc, argv);
set_program_name(argv[0]);
- register_fault_handlers();
- time_init();
- vlog_init();
+ vlog_set_levels(&VLM_reconnect, VLF_ANY_FACILITY, VLL_WARN);
+
parse_options(argc, argv);
signal(SIGPIPE, SIG_IGN);
process_init();
- die_if_already_running();
- daemonize();
+ daemonize_start();
retval = unixctl_server_create(NULL, &unixctl);
if (retval) {
- ovs_fatal(retval, "could not listen for vlog connections");
+ exit(EXIT_FAILURE);
}
if (brc_open(&brc_sock)) {
- ovs_fatal(0, "could not open brcompat socket. Check "
- "\"brcompat\" kernel module.");
+ VLOG_FATAL("could not open brcompat socket. Check "
+ "\"brcompat\" kernel module.");
}
- if (prune_timeout) {
- if (nl_sock_create(NETLINK_ROUTE, RTNLGRP_LINK, 0, 0, &rtnl_sock)) {
- ovs_fatal(0, "could not create rtnetlink socket");
- }
- }
- cfg_read();
+ rtnetlink_link_notifier_register(&link_notifier, netdev_changed_cb, NULL);
+
+ daemonize_complete();
for (;;) {
unixctl_server_run(unixctl);
+ rtnetlink_link_notifier_run();
brc_recv_update();
- /* If 'prune_timeout' is non-zero, we actively prune from the
- * config file any 'bridge..port' entries that are no
- * longer valid. We use two methods:
- *
- * 1) The kernel explicitly notifies us of removed ports
- * through the RTNL messages.
- *
- * 2) We periodically check all ports associated with bridges
- * to see if they no longer exist.
- */
- if (prune_timeout) {
- rtnl_recv_update();
- prune_ports();
-
- nl_sock_wait(rtnl_sock, POLLIN);
- poll_timer_wait(prune_timeout);
- }
+ netdev_run();
nl_sock_wait(brc_sock, POLLIN);
unixctl_server_wait(unixctl);
+ rtnetlink_link_notifier_wait();
+ netdev_wait();
poll_block();
}
+ rtnetlink_link_notifier_unregister(&link_notifier);
+
return 0;
}
@@ -660,31 +851,26 @@ static void
parse_options(int argc, char *argv[])
{
enum {
- OPT_LOCK_TIMEOUT = UCHAR_MAX + 1,
- OPT_PRUNE_TIMEOUT,
- OPT_RELOAD_COMMAND,
+ OPT_APPCTL,
+ OPT_VSCTL,
VLOG_OPTION_ENUMS,
- LEAK_CHECKER_OPTION_ENUMS
+ LEAK_CHECKER_OPTION_ENUMS,
+ DAEMON_OPTION_ENUMS
};
static struct option long_options[] = {
- {"help", no_argument, 0, 'h'},
- {"version", no_argument, 0, 'V'},
- {"lock-timeout", required_argument, 0, OPT_LOCK_TIMEOUT},
- {"prune-timeout", required_argument, 0, OPT_PRUNE_TIMEOUT},
- {"reload-command", required_argument, 0, OPT_RELOAD_COMMAND},
+ {"help", no_argument, NULL, 'h'},
+ {"version", no_argument, NULL, 'V'},
+ {"appctl", required_argument, NULL, OPT_APPCTL},
+ {"vsctl", required_argument, NULL, OPT_VSCTL},
DAEMON_LONG_OPTIONS,
VLOG_LONG_OPTIONS,
LEAK_CHECKER_LONG_OPTIONS,
- {0, 0, 0, 0},
+ {NULL, 0, NULL, 0},
};
char *short_options = long_options_to_short_options(long_options);
- int error;
+ const char *appctl = "ovs-appctl";
+ const char *vsctl = "ovs-vsctl";
- reload_command = xasprintf("%s/ovs-appctl -t "
- "%s/ovs-vswitchd.`cat %s/ovs-vswitchd.pid`.ctl "
- "-e vswitchd/reload 2>&1 "
- "| /usr/bin/logger -t brcompatd-reload",
- ovs_bindir, ovs_rundir, ovs_rundir);
for (;;) {
int c;
@@ -694,24 +880,19 @@ parse_options(int argc, char *argv[])
}
switch (c) {
- case 'H':
case 'h':
usage();
case 'V':
- OVS_PRINT_VERSION(0, 0);
+ ovs_print_version(0, 0);
exit(EXIT_SUCCESS);
- case OPT_LOCK_TIMEOUT:
- lock_timeout = atoi(optarg);
+ case OPT_APPCTL:
+ appctl = optarg;
break;
- case OPT_PRUNE_TIMEOUT:
- prune_timeout = atoi(optarg) * 1000;
- break;
-
- case OPT_RELOAD_COMMAND:
- reload_command = optarg;
+ case OPT_VSCTL:
+ vsctl = optarg;
break;
VLOG_OPTION_HANDLERS
@@ -727,19 +908,21 @@ parse_options(int argc, char *argv[])
}
free(short_options);
- argc -= optind;
- argv += optind;
+ appctl_program = process_search_path(appctl);
+ if (!appctl_program) {
+ VLOG_FATAL("%s: not found in $PATH (use --appctl to specify an "
+ "alternate location)", appctl);
+ }
- if (argc != 1) {
- ovs_fatal(0, "exactly one non-option argument required; "
- "use --help for usage");
+ vsctl_program = process_search_path(vsctl);
+ if (!vsctl_program) {
+ VLOG_FATAL("%s: not found in $PATH (use --vsctl to specify an "
+ "alternate location)", vsctl);
}
- config_file = argv[0];
- error = cfg_set_file(config_file);
- if (error) {
- ovs_fatal(error, "failed to add configuration file \"%s\"",
- config_file);
+ if (argc != optind) {
+ VLOG_FATAL("no non-option arguments are supported; "
+ "use --help for usage");
}
}
@@ -747,13 +930,11 @@ static void
usage(void)
{
printf("%s: bridge compatibility front-end for ovs-vswitchd\n"
- "usage: %s [OPTIONS] CONFIG\n"
- "CONFIG is the configuration file used by ovs-vswitchd.\n",
+ "usage: %s [OPTIONS]\n",
program_name, program_name);
printf("\nConfiguration options:\n"
- " --reload-command=COMMAND shell command to reload ovs-vswitchd\n"
- " --prune-timeout=SECS wait at most SECS before pruning ports\n"
- " --lock-timeout=MSECS wait at most MSECS for CONFIG to unlock\n"
+ " --appctl=PROGRAM overrides $PATH for finding ovs-appctl\n"
+ " --vsctl=PROGRAM overrides $PATH for finding ovs-vsctl\n"
);
daemon_usage();
vlog_usage();
@@ -761,6 +942,5 @@ usage(void)
" -h, --help display this help message\n"
" -V, --version display version information\n");
leak_checker_usage();
- printf("\nThe default reload command is:\n%s\n", reload_command);
exit(EXIT_SUCCESS);
}