mirror of
https://github.com/openvswitch/ovs
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40f0707cd9
When --monitor is used, administrators sometimes become confused about the presence of two copies of each process. This commit attempts to clarify the situation by making the monitoring process change its process name, as seen in /proc/$pid/cmdline and in "ps", to clearly indicate what is going on. CC: Dan Wendlandt <dan@nicira.com>
341 lines
8.3 KiB
C
341 lines
8.3 KiB
C
/*
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* Copyright (c) 2009, 2010 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "jsonrpc.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "command-line.h"
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#include "daemon.h"
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#include "json.h"
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#include "poll-loop.h"
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#include "stream-ssl.h"
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#include "stream.h"
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#include "timeval.h"
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#include "util.h"
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#include "vlog.h"
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static struct command all_commands[];
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static void usage(void) NO_RETURN;
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static void parse_options(int argc, char *argv[]);
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int
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main(int argc, char *argv[])
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{
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proctitle_init(argc, argv);
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set_program_name(argv[0]);
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time_init();
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vlog_init();
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parse_options(argc, argv);
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run_command(argc - optind, argv + optind, all_commands);
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return 0;
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}
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static void
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parse_options(int argc, char *argv[])
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{
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enum {
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OPT_BOOTSTRAP_CA_CERT = UCHAR_MAX + 1
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};
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static struct option long_options[] = {
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{"verbose", optional_argument, 0, 'v'},
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{"help", no_argument, 0, 'h'},
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DAEMON_LONG_OPTIONS,
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#ifdef HAVE_OPENSSL
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{"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
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STREAM_SSL_LONG_OPTIONS
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#endif
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{0, 0, 0, 0},
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};
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char *short_options = long_options_to_short_options(long_options);
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for (;;) {
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int c = getopt_long(argc, argv, short_options, long_options, NULL);
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if (c == -1) {
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break;
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}
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switch (c) {
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case 'h':
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usage();
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case 'v':
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vlog_set_verbosity(optarg);
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break;
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DAEMON_OPTION_HANDLERS
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#ifdef HAVE_OPENSSL
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STREAM_SSL_OPTION_HANDLERS
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case OPT_BOOTSTRAP_CA_CERT:
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stream_ssl_set_ca_cert_file(optarg, true);
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break;
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#endif
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case '?':
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exit(EXIT_FAILURE);
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default:
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abort();
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}
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}
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free(short_options);
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}
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static void
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usage(void)
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{
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printf("%s: JSON-RPC test utility\n"
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"usage: %s [OPTIONS] COMMAND [ARG...]\n"
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" listen LOCAL listen for connections on LOCAL\n"
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" request REMOTE METHOD PARAMS send request, print reply\n"
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" notify REMOTE METHOD PARAMS send notification and exit\n",
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program_name, program_name);
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stream_usage("JSON-RPC", true, true, true);
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daemon_usage();
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vlog_usage();
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printf("\nOther options:\n"
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" -h, --help display this help message\n");
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exit(EXIT_SUCCESS);
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}
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/* Command helper functions. */
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static struct json *
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parse_json(const char *s)
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{
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struct json *json = json_from_string(s);
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if (json->type == JSON_STRING) {
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ovs_fatal(0, "\"%s\": %s", s, json->u.string);
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}
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return json;
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}
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static void
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print_and_free_json(struct json *json)
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{
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char *string = json_to_string(json, JSSF_SORT);
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json_destroy(json);
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puts(string);
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free(string);
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}
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/* Command implementations. */
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static void
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handle_rpc(struct jsonrpc *rpc, struct jsonrpc_msg *msg, bool *done)
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{
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struct jsonrpc_msg *reply = NULL;
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if (msg->type == JSONRPC_REQUEST) {
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if (!strcmp(msg->method, "echo")) {
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reply = jsonrpc_create_reply(json_clone(msg->params), msg->id);
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} else {
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struct json *error = json_object_create();
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json_object_put_string(error, "error", "unknown method");
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reply = jsonrpc_create_error(error, msg->id);
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ovs_error(0, "unknown request %s", msg->method);
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}
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} else if (msg->type == JSONRPC_NOTIFY) {
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if (!strcmp(msg->method, "shutdown")) {
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*done = true;
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} else {
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jsonrpc_error(rpc, ENOTTY);
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ovs_error(0, "unknown notification %s", msg->method);
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}
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} else {
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jsonrpc_error(rpc, EPROTO);
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ovs_error(0, "unsolicited JSON-RPC reply or error");
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}
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if (reply) {
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jsonrpc_send(rpc, reply);
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}
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}
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static void
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do_listen(int argc UNUSED, char *argv[])
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{
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struct pstream *pstream;
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struct jsonrpc **rpcs;
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size_t n_rpcs, allocated_rpcs;
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bool done;
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int error;
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die_if_already_running();
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error = pstream_open(argv[1], &pstream);
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if (error) {
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ovs_fatal(error, "could not listen on \"%s\"", argv[1]);
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}
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daemonize();
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rpcs = NULL;
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n_rpcs = allocated_rpcs = 0;
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done = false;
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for (;;) {
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struct stream *stream;
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size_t i;
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/* Accept new connections. */
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error = pstream_accept(pstream, &stream);
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if (!error) {
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if (n_rpcs >= allocated_rpcs) {
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rpcs = x2nrealloc(rpcs, &allocated_rpcs, sizeof *rpcs);
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}
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rpcs[n_rpcs++] = jsonrpc_open(stream);
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} else if (error != EAGAIN) {
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ovs_fatal(error, "pstream_accept failed");
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}
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/* Service existing connections. */
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for (i = 0; i < n_rpcs; ) {
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struct jsonrpc *rpc = rpcs[i];
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struct jsonrpc_msg *msg;
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jsonrpc_run(rpc);
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if (!jsonrpc_get_backlog(rpc)) {
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error = jsonrpc_recv(rpc, &msg);
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if (!error) {
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handle_rpc(rpc, msg, &done);
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jsonrpc_msg_destroy(msg);
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}
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}
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error = jsonrpc_get_status(rpc);
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if (error) {
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jsonrpc_close(rpc);
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ovs_error(error, "connection closed");
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memmove(&rpcs[i], &rpcs[i + 1],
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(n_rpcs - i - 1) * sizeof *rpcs);
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n_rpcs--;
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} else {
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i++;
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}
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}
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/* Wait for something to do. */
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if (done && !n_rpcs) {
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break;
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}
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pstream_wait(pstream);
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for (i = 0; i < n_rpcs; i++) {
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struct jsonrpc *rpc = rpcs[i];
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jsonrpc_wait(rpc);
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if (!jsonrpc_get_backlog(rpc)) {
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jsonrpc_recv_wait(rpc);
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}
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}
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poll_block();
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}
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}
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static void
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do_request(int argc UNUSED, char *argv[])
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{
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struct jsonrpc_msg *msg;
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struct jsonrpc *rpc;
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struct json *params;
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struct stream *stream;
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const char *method;
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char *string;
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int error;
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method = argv[2];
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params = parse_json(argv[3]);
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msg = jsonrpc_create_request(method, params, NULL);
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string = jsonrpc_msg_is_valid(msg);
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if (string) {
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ovs_fatal(0, "not a valid JSON-RPC request: %s", string);
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}
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error = stream_open_block(argv[1], &stream);
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if (error) {
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ovs_fatal(error, "could not open \"%s\"", argv[1]);
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}
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rpc = jsonrpc_open(stream);
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error = jsonrpc_send(rpc, msg);
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if (error) {
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ovs_fatal(error, "could not send request");
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}
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error = jsonrpc_recv_block(rpc, &msg);
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if (error) {
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ovs_fatal(error, "error waiting for reply");
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}
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print_and_free_json(jsonrpc_msg_to_json(msg));
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jsonrpc_close(rpc);
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}
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static void
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do_notify(int argc UNUSED, char *argv[])
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{
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struct jsonrpc_msg *msg;
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struct jsonrpc *rpc;
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struct json *params;
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struct stream *stream;
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const char *method;
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char *string;
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int error;
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method = argv[2];
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params = parse_json(argv[3]);
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msg = jsonrpc_create_notify(method, params);
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string = jsonrpc_msg_is_valid(msg);
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if (string) {
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ovs_fatal(0, "not a JSON RPC-valid notification: %s", string);
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}
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error = stream_open_block(argv[1], &stream);
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if (error) {
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ovs_fatal(error, "could not open \"%s\"", argv[1]);
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}
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rpc = jsonrpc_open(stream);
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error = jsonrpc_send_block(rpc, msg);
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if (error) {
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ovs_fatal(error, "could not send request");
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}
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jsonrpc_close(rpc);
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}
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static void
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do_help(int argc UNUSED, char *argv[] UNUSED)
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{
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usage();
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}
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static struct command all_commands[] = {
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{ "listen", 1, 1, do_listen },
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{ "request", 3, 3, do_request },
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{ "notify", 3, 3, do_notify },
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{ "help", 0, INT_MAX, do_help },
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{ NULL, 0, 0, NULL },
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};
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