ovsdb/ovsdb-tool.c

   1 /*
   2  * Copyright (c) 2009 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <getopt.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "command-line.h"
  26 #include "compiler.h"
  27 #include "file.h"
  28 #include "log.h"
  29 #include "json.h"
  30 #include "ovsdb.h"
  31 #include "ovsdb-error.h"
  32 #include "table.h"
  33 #include "timeval.h"
  34 #include "util.h"
  35
  36 #include "vlog.h"
  37 #define THIS_MODULE VLM_ovsdb_tool
  38
  39 static const struct command all_commands[];
  40
  41 static void usage(void) NO_RETURN;
  42 static void parse_options(int argc, char *argv[]);
  43
  44 int
  45 main(int argc, char *argv[])
  46 {
  47     set_program_name(argv[0]);
  48     time_init();
  49     vlog_init();
  50     parse_options(argc, argv);
  51     signal(SIGPIPE, SIG_IGN);
  52     run_command(argc - optind, argv + optind, all_commands);
  53     return 0;
  54 }
  55
  56 static void
  57 parse_options(int argc, char *argv[])
  58 {
  59     static struct option long_options[] = {
  60         {"verbose", optional_argument, 0, 'v'},
  61         {"help", no_argument, 0, 'h'},
  62         {"version", no_argument, 0, 'V'},
  63         {0, 0, 0, 0},
  64     };
  65     char *short_options = long_options_to_short_options(long_options);
  66
  67     for (;;) {
  68         int c;
  69
  70         c = getopt_long(argc, argv, short_options, long_options, NULL);
  71         if (c == -1) {
  72             break;
  73         }
  74
  75         switch (c) {
  76         case 'h':
  77             usage();
  78
  79         case 'V':
  80             OVS_PRINT_VERSION(0, 0);
  81             exit(EXIT_SUCCESS);
  82
  83         case 'v':
  84             vlog_set_verbosity(optarg);
  85             break;
  86
  87         case '?':
  88             exit(EXIT_FAILURE);
  89
  90         default:
  91             abort();
  92         }
  93     }
  94     free(short_options);
  95 }
  96
  97 static void
  98 usage(void)
  99 {
 100     printf("%s: Open vSwitch database management utility\n"
 101            "usage: %s [OPTIONS] COMMAND [ARG...]\n"
 102            "  create DB SCHEMA   create DB with the given SCHEMA\n"
 103            "  compact DB [DST]   compact DB in-place (or to DST)\n"
 104            "  extract-schema DB  print DB's schema on stdout\n"
 105            "  query DB TRNS      execute read-only transaction on DB\n"
 106            "  transact DB TRNS   execute read/write transaction on DB\n",
 107            program_name, program_name);
 108     vlog_usage();
 109     printf("\nOther options:\n"
 110            "  -h, --help                  display this help message\n"
 111            "  -V, --version               display version information\n");
 112     exit(EXIT_SUCCESS);
 113 }
 114 \f
 115 static struct json *
 116 parse_json(const char *s)
 117 {
 118     struct json *json = json_from_string(s);
 119     if (json->type == JSON_STRING) {
 120         ovs_fatal(0, "\"%s\": %s", s, json->u.string);
 121     }
 122     return json;
 123 }
 124
 125 static void
 126 print_and_free_json(struct json *json)
 127 {
 128     char *string = json_to_string(json, JSSF_SORT);
 129     json_destroy(json);
 130     puts(string);
 131     free(string);
 132 }
 133
 134 static void
 135 check_ovsdb_error(struct ovsdb_error *error)
 136 {
 137     if (error) {
 138         ovs_fatal(0, "%s", ovsdb_error_to_string(error));
 139     }
 140 }
 141 \f
 142 static void
 143 do_create(int argc UNUSED, char *argv[])
 144 {
 145     const char *db_file_name = argv[1];
 146     const char *schema_file_name = argv[2];
 147     struct ovsdb_schema *schema;
 148     struct ovsdb_log *log;
 149     struct json *json;
 150
 151     /* Read schema from file and convert to JSON. */
 152     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 153     json = ovsdb_schema_to_json(schema);
 154
 155     /* Create database file. */
 156     check_ovsdb_error(ovsdb_log_open(db_file_name, O_RDWR | O_CREAT | O_EXCL,
 157                                      &log));
 158     check_ovsdb_error(ovsdb_log_write(log, json));
 159     check_ovsdb_error(ovsdb_log_commit(log));
 160     ovsdb_log_close(log);
 161
 162     json_destroy(json);
 163 }
 164
 165 static void
 166 transact(bool read_only, const char *db_file_name, const char *transaction)
 167 {
 168     struct json *request, *result;
 169     struct ovsdb *db;
 170
 171     check_ovsdb_error(ovsdb_file_open(db_file_name, read_only, &db));
 172
 173     request = parse_json(transaction);
 174     result = ovsdb_execute(db, request, 0, NULL);
 175     json_destroy(request);
 176
 177     print_and_free_json(result);
 178     ovsdb_destroy(db);
 179 }
 180
 181 static void
 182 do_query(int argc UNUSED, char *argv[])
 183 {
 184     transact(true, argv[1], argv[2]);
 185 }
 186
 187 static void
 188 do_transact(int argc UNUSED, char *argv[])
 189 {
 190     transact(false, argv[1], argv[2]);
 191 }
 192
 193 static void
 194 do_help(int argc UNUSED, char *argv[] UNUSED)
 195 {
 196     usage();
 197 }
 198
 199 static const struct command all_commands[] = {
 200     { "create", 2, 2, do_create },
 201     { "query", 2, 2, do_query },
 202     { "transact", 2, 2, do_transact },
 203     { "help", 0, INT_MAX, do_help },
 204     { NULL, 0, 0, NULL },
 205 };