ovsdb/ovsdb-server.c

   1 /* Copyright (c) 2009, 2010 Nicira Networks
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <config.h>
  17
  18 #include "ovsdb.h"
  19
  20 #include <errno.h>
  21 #include <getopt.h>
  22 #include <signal.h>
  23 #include <unistd.h>
  24
  25 #include "column.h"
  26 #include "command-line.h"
  27 #include "daemon.h"
  28 #include "file.h"
  29 #include "json.h"
  30 #include "jsonrpc.h"
  31 #include "jsonrpc-server.h"
  32 #include "leak-checker.h"
  33 #include "list.h"
  34 #include "ovsdb-data.h"
  35 #include "ovsdb-types.h"
  36 #include "ovsdb-error.h"
  37 #include "poll-loop.h"
  38 #include "process.h"
  39 #include "row.h"
  40 #include "stream-ssl.h"
  41 #include "stream.h"
  42 #include "svec.h"
  43 #include "table.h"
  44 #include "timeval.h"
  45 #include "trigger.h"
  46 #include "util.h"
  47 #include "unixctl.h"
  48
  49 #include "vlog.h"
  50 #define THIS_MODULE VLM_ovsdb_server
  51
  52 static unixctl_cb_func ovsdb_server_exit;
  53
  54 static void parse_options(int argc, char *argv[], char **file_namep,
  55                           struct shash *remotes, char **unixctl_pathp);
  56 static void usage(void) NO_RETURN;
  57
  58 static void set_remotes(struct ovsdb_jsonrpc_server *jsonrpc,
  59                         const struct ovsdb *db, struct shash *remotes);
  60
  61 int
  62 main(int argc, char *argv[])
  63 {
  64     char *unixctl_path = NULL;
  65     struct unixctl_server *unixctl;
  66     struct ovsdb_jsonrpc_server *jsonrpc;
  67     struct shash remotes;
  68     struct ovsdb_error *error;
  69     struct ovsdb *db;
  70     char *file_name;
  71     bool exiting;
  72     int retval;
  73
  74     set_program_name(argv[0]);
  75     time_init();
  76     vlog_init();
  77     signal(SIGPIPE, SIG_IGN);
  78     process_init();
  79
  80     parse_options(argc, argv, &file_name, &remotes, &unixctl_path);
  81
  82     die_if_already_running();
  83     daemonize_start();
  84
  85     error = ovsdb_file_open(file_name, false, &db);
  86     if (error) {
  87         ovs_fatal(0, "%s", ovsdb_error_to_string(error));
  88     }
  89
  90     jsonrpc = ovsdb_jsonrpc_server_create(db);
  91     set_remotes(jsonrpc, db, &remotes);
  92
  93     retval = unixctl_server_create(unixctl_path, &unixctl);
  94     if (retval) {
  95         ovs_fatal(retval, "could not listen for control connections");
  96     }
  97
  98     daemonize_complete();
  99
 100     unixctl_command_register("exit", ovsdb_server_exit, &exiting);
 101
 102     exiting = false;
 103     while (!exiting) {
 104         set_remotes(jsonrpc, db, &remotes);
 105         ovsdb_jsonrpc_server_run(jsonrpc);
 106         unixctl_server_run(unixctl);
 107         ovsdb_trigger_run(db, time_msec());
 108
 109         ovsdb_jsonrpc_server_wait(jsonrpc);
 110         unixctl_server_wait(unixctl);
 111         ovsdb_trigger_wait(db, time_msec());
 112         poll_block();
 113     }
 114
 115     return 0;
 116 }
 117
 118 static void
 119 query_db_remotes(const char *name_, const struct ovsdb *db,
 120                  struct shash *remotes)
 121 {
 122     char *name, *db_prefix, *table_name, *column_name;
 123     const struct ovsdb_column *column;
 124     const struct ovsdb_table *table;
 125     const struct ovsdb_row *row;
 126     char *save_ptr = NULL;
 127
 128     name = xstrdup(name_);
 129     db_prefix = strtok_r(name, ":", &save_ptr);
 130     table_name = strtok_r(NULL, ",", &save_ptr);
 131     column_name = strtok_r(NULL, ",", &save_ptr);
 132     if (!table_name || !column_name) {
 133         ovs_fatal(0, "remote \"%s\": invalid syntax", name_);
 134     }
 135
 136     table = ovsdb_get_table(db, table_name);
 137     if (!table) {
 138         ovs_fatal(0, "remote \"%s\": no table named %s", name_, table_name);
 139     }
 140
 141     column = ovsdb_table_schema_get_column(table->schema, column_name);
 142     if (!column) {
 143         ovs_fatal(0, "remote \"%s\": table \"%s\" has no column \"%s\"",
 144                   name_, table_name, column_name);
 145     }
 146
 147     if (column->type.key_type != OVSDB_TYPE_STRING
 148         || column->type.value_type != OVSDB_TYPE_VOID) {
 149         ovs_fatal(0, "remote \"%s\": type of table \"%s\" column \"%s\" is "
 150                   "not string or set of strings",
 151                   name_, table_name, column_name);
 152     }
 153
 154     HMAP_FOR_EACH (row, struct ovsdb_row, hmap_node, &table->rows) {
 155         const struct ovsdb_datum *datum;
 156         size_t i;
 157
 158         datum = &row->fields[column->index];
 159         for (i = 0; i < datum->n; i++) {
 160             shash_add_once(remotes, datum->keys[i].string, NULL);
 161         }
 162     }
 163
 164     free(name);
 165 }
 166
 167 static void
 168 set_remotes(struct ovsdb_jsonrpc_server *jsonrpc,
 169             const struct ovsdb *db, struct shash *remotes)
 170 {
 171     struct shash resolved_remotes;
 172     struct shash_node *node;
 173
 174     shash_init(&resolved_remotes);
 175     SHASH_FOR_EACH (node, remotes) {
 176         const char *name = node->name;
 177
 178         if (!strncmp(name, "db:", 3)) {
 179             query_db_remotes(name, db, &resolved_remotes);
 180         } else {
 181             shash_add_once(&resolved_remotes, name, NULL);
 182         }
 183     }
 184     ovsdb_jsonrpc_server_set_remotes(jsonrpc, &resolved_remotes);
 185     shash_destroy(&resolved_remotes);
 186 }
 187
 188
 189 static void
 190 ovsdb_server_exit(struct unixctl_conn *conn, const char *args UNUSED,
 191                   void *exiting_)
 192 {
 193     bool *exiting = exiting_;
 194     *exiting = true;
 195     unixctl_command_reply(conn, 200, NULL);
 196 }
 197
 198 static void
 199 parse_options(int argc, char *argv[], char **file_namep,
 200               struct shash *remotes, char **unixctl_pathp)
 201 {
 202     enum {
 203         OPT_DUMMY = UCHAR_MAX + 1,
 204         OPT_REMOTE,
 205         OPT_UNIXCTL,
 206         OPT_BOOTSTRAP_CA_CERT,
 207         VLOG_OPTION_ENUMS,
 208         LEAK_CHECKER_OPTION_ENUMS
 209     };
 210     static struct option long_options[] = {
 211         {"remote",      required_argument, 0, OPT_REMOTE},
 212         {"unixctl",     required_argument, 0, OPT_UNIXCTL},
 213         {"help",        no_argument, 0, 'h'},
 214         {"version",     no_argument, 0, 'V'},
 215         DAEMON_LONG_OPTIONS,
 216         VLOG_LONG_OPTIONS,
 217         LEAK_CHECKER_LONG_OPTIONS,
 218 #ifdef HAVE_OPENSSL
 219         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 220         STREAM_SSL_LONG_OPTIONS
 221 #endif
 222         {0, 0, 0, 0},
 223     };
 224     char *short_options = long_options_to_short_options(long_options);
 225
 226     shash_init(remotes);
 227     for (;;) {
 228         int c;
 229
 230         c = getopt_long(argc, argv, short_options, long_options, NULL);
 231         if (c == -1) {
 232             break;
 233         }
 234
 235         switch (c) {
 236         case OPT_REMOTE:
 237             shash_add_once(remotes, optarg, NULL);
 238             break;
 239
 240         case OPT_UNIXCTL:
 241             *unixctl_pathp = optarg;
 242             break;
 243
 244         case 'h':
 245             usage();
 246
 247         case 'V':
 248             OVS_PRINT_VERSION(0, 0);
 249             exit(EXIT_SUCCESS);
 250
 251         VLOG_OPTION_HANDLERS
 252         DAEMON_OPTION_HANDLERS
 253         LEAK_CHECKER_OPTION_HANDLERS
 254
 255 #ifdef HAVE_OPENSSL
 256         STREAM_SSL_OPTION_HANDLERS
 257
 258         case OPT_BOOTSTRAP_CA_CERT:
 259             stream_ssl_set_ca_cert_file(optarg, true);
 260             break;
 261 #endif
 262
 263
 264         case '?':
 265             exit(EXIT_FAILURE);
 266
 267         default:
 268             abort();
 269         }
 270     }
 271     free(short_options);
 272
 273     argc -= optind;
 274     argv += optind;
 275
 276     if (argc > 1) {
 277         ovs_fatal(0, "database file is only non-option argument; "
 278                 "use --help for usage");
 279     } else if (argc < 1) {
 280         ovs_fatal(0, "missing database file argument; use --help for usage");
 281     }
 282
 283     *file_namep = argv[0];
 284 }
 285
 286 static void
 287 usage(void)
 288 {
 289     printf("%s: Open vSwitch database server\n"
 290            "usage: %s [OPTIONS] DATABASE\n"
 291            "where DATABASE is a database file in ovsdb format.\n",
 292            program_name, program_name);
 293     printf("\nJSON-RPC options (may be specified any number of times):\n"
 294            "  --remote=REMOTE         connect or listen to REMOTE\n");
 295     stream_usage("JSON-RPC", true, true, true);
 296     daemon_usage();
 297     vlog_usage();
 298     printf("\nOther options:\n"
 299            "  -h, --help              display this help message\n"
 300            "  -V, --version           display version information\n");
 301     leak_checker_usage();
 302     exit(EXIT_SUCCESS);
 303 }