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     proctitle_init(argc, argv);
  75     set_program_name(argv[0]);
  76     time_init();
  77     vlog_init();
  78     signal(SIGPIPE, SIG_IGN);
  79     process_init();
  80
  81     parse_options(argc, argv, &file_name, &remotes, &unixctl_path);
  82
  83     die_if_already_running();
  84     daemonize_start();
  85
  86     error = ovsdb_file_open(file_name, false, &db);
  87     if (error) {
  88         ovs_fatal(0, "%s", ovsdb_error_to_string(error));
  89     }
  90
  91     jsonrpc = ovsdb_jsonrpc_server_create(db);
  92     set_remotes(jsonrpc, db, &remotes);
  93
  94     retval = unixctl_server_create(unixctl_path, &unixctl);
  95     if (retval) {
  96         exit(EXIT_FAILURE);
  97     }
  98
  99     daemonize_complete();
 100
 101     unixctl_command_register("exit", ovsdb_server_exit, &exiting);
 102
 103     exiting = false;
 104     while (!exiting) {
 105         set_remotes(jsonrpc, db, &remotes);
 106         ovsdb_jsonrpc_server_run(jsonrpc);
 107         unixctl_server_run(unixctl);
 108         ovsdb_trigger_run(db, time_msec());
 109
 110         ovsdb_jsonrpc_server_wait(jsonrpc);
 111         unixctl_server_wait(unixctl);
 112         ovsdb_trigger_wait(db, time_msec());
 113         poll_block();
 114     }
 115     ovsdb_jsonrpc_server_destroy(jsonrpc);
 116     ovsdb_destroy(db);
 117     shash_destroy(&remotes);
 118     unixctl_server_destroy(unixctl);
 119
 120     return 0;
 121 }
 122
 123 static void
 124 query_db_remotes(const char *name_, const struct ovsdb *db,
 125                  struct shash *remotes)
 126 {
 127     char *name, *table_name, *column_name;
 128     const struct ovsdb_column *column;
 129     const struct ovsdb_table *table;
 130     const struct ovsdb_row *row;
 131     char *save_ptr = NULL;
 132
 133     name = xstrdup(name_);
 134     strtok_r(name, ":", &save_ptr); /* "db:" */
 135     table_name = strtok_r(NULL, ",", &save_ptr);
 136     column_name = strtok_r(NULL, ",", &save_ptr);
 137     if (!table_name || !column_name) {
 138         ovs_fatal(0, "remote \"%s\": invalid syntax", name_);
 139     }
 140
 141     table = ovsdb_get_table(db, table_name);
 142     if (!table) {
 143         ovs_fatal(0, "remote \"%s\": no table named %s", name_, table_name);
 144     }
 145
 146     column = ovsdb_table_schema_get_column(table->schema, column_name);
 147     if (!column) {
 148         ovs_fatal(0, "remote \"%s\": table \"%s\" has no column \"%s\"",
 149                   name_, table_name, column_name);
 150     }
 151
 152     if (column->type.key.type != OVSDB_TYPE_STRING
 153         || column->type.value.type != OVSDB_TYPE_VOID) {
 154         ovs_fatal(0, "remote \"%s\": type of table \"%s\" column \"%s\" is "
 155                   "not string or set of strings",
 156                   name_, table_name, column_name);
 157     }
 158
 159     HMAP_FOR_EACH (row, struct ovsdb_row, hmap_node, &table->rows) {
 160         const struct ovsdb_datum *datum;
 161         size_t i;
 162
 163         datum = &row->fields[column->index];
 164         for (i = 0; i < datum->n; i++) {
 165             shash_add_once(remotes, datum->keys[i].string, NULL);
 166         }
 167     }
 168
 169     free(name);
 170 }
 171
 172 static void
 173 set_remotes(struct ovsdb_jsonrpc_server *jsonrpc,
 174             const struct ovsdb *db, struct shash *remotes)
 175 {
 176     struct shash resolved_remotes;
 177     struct shash_node *node;
 178
 179     shash_init(&resolved_remotes);
 180     SHASH_FOR_EACH (node, remotes) {
 181         const char *name = node->name;
 182
 183         if (!strncmp(name, "db:", 3)) {
 184             query_db_remotes(name, db, &resolved_remotes);
 185         } else {
 186             shash_add_once(&resolved_remotes, name, NULL);
 187         }
 188     }
 189     ovsdb_jsonrpc_server_set_remotes(jsonrpc, &resolved_remotes);
 190     shash_destroy(&resolved_remotes);
 191 }
 192
 193
 194 static void
 195 ovsdb_server_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 196                   void *exiting_)
 197 {
 198     bool *exiting = exiting_;
 199     *exiting = true;
 200     unixctl_command_reply(conn, 200, NULL);
 201 }
 202
 203 static void
 204 parse_options(int argc, char *argv[], char **file_namep,
 205               struct shash *remotes, char **unixctl_pathp)
 206 {
 207     enum {
 208         OPT_DUMMY = UCHAR_MAX + 1,
 209         OPT_REMOTE,
 210         OPT_UNIXCTL,
 211         OPT_BOOTSTRAP_CA_CERT,
 212         VLOG_OPTION_ENUMS,
 213         LEAK_CHECKER_OPTION_ENUMS
 214     };
 215     static struct option long_options[] = {
 216         {"remote",      required_argument, 0, OPT_REMOTE},
 217         {"unixctl",     required_argument, 0, OPT_UNIXCTL},
 218         {"help",        no_argument, 0, 'h'},
 219         {"version",     no_argument, 0, 'V'},
 220         DAEMON_LONG_OPTIONS,
 221         VLOG_LONG_OPTIONS,
 222         LEAK_CHECKER_LONG_OPTIONS,
 223 #ifdef HAVE_OPENSSL
 224         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 225         STREAM_SSL_LONG_OPTIONS
 226 #endif
 227         {0, 0, 0, 0},
 228     };
 229     char *short_options = long_options_to_short_options(long_options);
 230
 231     shash_init(remotes);
 232     for (;;) {
 233         int c;
 234
 235         c = getopt_long(argc, argv, short_options, long_options, NULL);
 236         if (c == -1) {
 237             break;
 238         }
 239
 240         switch (c) {
 241         case OPT_REMOTE:
 242             shash_add_once(remotes, optarg, NULL);
 243             break;
 244
 245         case OPT_UNIXCTL:
 246             *unixctl_pathp = optarg;
 247             break;
 248
 249         case 'h':
 250             usage();
 251
 252         case 'V':
 253             OVS_PRINT_VERSION(0, 0);
 254             exit(EXIT_SUCCESS);
 255
 256         VLOG_OPTION_HANDLERS
 257         DAEMON_OPTION_HANDLERS
 258         LEAK_CHECKER_OPTION_HANDLERS
 259
 260 #ifdef HAVE_OPENSSL
 261         STREAM_SSL_OPTION_HANDLERS
 262
 263         case OPT_BOOTSTRAP_CA_CERT:
 264             stream_ssl_set_ca_cert_file(optarg, true);
 265             break;
 266 #endif
 267
 268
 269         case '?':
 270             exit(EXIT_FAILURE);
 271
 272         default:
 273             abort();
 274         }
 275     }
 276     free(short_options);
 277
 278     argc -= optind;
 279     argv += optind;
 280
 281     if (argc > 1) {
 282         ovs_fatal(0, "database file is only non-option argument; "
 283                 "use --help for usage");
 284     } else if (argc < 1) {
 285         ovs_fatal(0, "missing database file argument; use --help for usage");
 286     }
 287
 288     *file_namep = argv[0];
 289 }
 290
 291 static void
 292 usage(void)
 293 {
 294     printf("%s: Open vSwitch database server\n"
 295            "usage: %s [OPTIONS] DATABASE\n"
 296            "where DATABASE is a database file in ovsdb format.\n",
 297            program_name, program_name);
 298     printf("\nJSON-RPC options (may be specified any number of times):\n"
 299            "  --remote=REMOTE         connect or listen to REMOTE\n");
 300     stream_usage("JSON-RPC", true, true, true);
 301     daemon_usage();
 302     vlog_usage();
 303     printf("\nOther options:\n"
 304            "  -h, --help              display this help message\n"
 305            "  -V, --version           display version information\n");
 306     leak_checker_usage();
 307     exit(EXIT_SUCCESS);
 308 }