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ovsdb-client.c
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/*
* Copyright (c) 2009-2017 Nicira, Inc.
*
* 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:
*
* 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 <config.h>
#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "command-line.h"
#include "column.h"
#include "compiler.h"
#include "daemon.h"
#include "dirs.h"
#include "openvswitch/dynamic-string.h"
#include "fatal-signal.h"
#include "openvswitch/json.h"
#include "jsonrpc.h"
#include "lib/table.h"
#include "ovsdb.h"
#include "ovsdb-data.h"
#include "ovsdb-error.h"
#include "poll-loop.h"
#include "sort.h"
#include "svec.h"
#include "stream.h"
#include "stream-ssl.h"
#include "table.h"
#include "monitor.h"
#include "condition.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(ovsdb_client);
enum args_needed {
NEED_NONE, /* No JSON-RPC connection or database name needed. */
NEED_RPC, /* JSON-RPC connection needed. */
NEED_DATABASE /* JSON-RPC connection and database name needed. */
};
struct ovsdb_client_command {
const char *name;
enum args_needed need;
int min_args;
int max_args;
void (*handler)(struct jsonrpc *rpc, const char *database,
int argc, char *argv[]);
};
/* --timestamp: Print a timestamp before each update on "monitor" command? */
static bool timestamp;
/* Format for table output. */
static struct table_style table_style = TABLE_STYLE_DEFAULT;
static const struct ovsdb_client_command *get_all_commands(void);
OVS_NO_RETURN static void usage(void);
static void parse_options(int argc, char *argv[]);
static struct jsonrpc *open_jsonrpc(const char *server);
static void fetch_dbs(struct jsonrpc *, struct svec *dbs);
int
main(int argc, char *argv[])
{
const struct ovsdb_client_command *command;
char *database;
struct jsonrpc *rpc;
ovs_cmdl_proctitle_init(argc, argv);
set_program_name(argv[0]);
service_start(&argc, &argv);
parse_options(argc, argv);
fatal_ignore_sigpipe();
daemon_become_new_user(false);
if (optind >= argc) {
ovs_fatal(0, "missing command name; use --help for help");
}
for (command = get_all_commands(); ; command++) {
if (!command->name) {
VLOG_FATAL("unknown command '%s'; use --help for help",
argv[optind]);
} else if (!strcmp(command->name, argv[optind])) {
break;
}
}
optind++;
if (command->need != NEED_NONE) {
if (argc - optind > command->min_args
&& (isalpha((unsigned char) argv[optind][0])
&& strchr(argv[optind], ':'))) {
rpc = open_jsonrpc(argv[optind++]);
} else {
char *sock = xasprintf("unix:%s/db.sock", ovs_rundir());
rpc = open_jsonrpc(sock);
free(sock);
}
} else {
rpc = NULL;
}
if (command->need == NEED_DATABASE) {
struct svec dbs;
svec_init(&dbs);
fetch_dbs(rpc, &dbs);
if (argc - optind > command->min_args
&& svec_contains(&dbs, argv[optind])) {
database = xstrdup(argv[optind++]);
} else if (dbs.n == 1) {
database = xstrdup(dbs.names[0]);
} else if (svec_contains(&dbs, "Open_vSwitch")) {
database = xstrdup("Open_vSwitch");
} else {
jsonrpc_close(rpc);
ovs_fatal(0, "no default database for `%s' command, please "
"specify a database name", command->name);
}
svec_destroy(&dbs);
} else {
database = NULL;
}
if (argc - optind < command->min_args ||
argc - optind > command->max_args) {
free(database);
VLOG_FATAL("invalid syntax for '%s' (use --help for help)",
command->name);
}
command->handler(rpc, database, argc - optind, argv + optind);
free(database);
jsonrpc_close(rpc);
if (ferror(stdout)) {
VLOG_FATAL("write to stdout failed");
}
if (ferror(stderr)) {
VLOG_FATAL("write to stderr failed");
}
return 0;
}
static void
parse_options(int argc, char *argv[])
{
enum {
OPT_BOOTSTRAP_CA_CERT = UCHAR_MAX + 1,
OPT_TIMESTAMP,
VLOG_OPTION_ENUMS,
DAEMON_OPTION_ENUMS,
TABLE_OPTION_ENUMS,
SSL_OPTION_ENUMS,
};
static const struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{"timestamp", no_argument, NULL, OPT_TIMESTAMP},
VLOG_LONG_OPTIONS,
DAEMON_LONG_OPTIONS,
#ifdef HAVE_OPENSSL
{"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
STREAM_SSL_LONG_OPTIONS,
#endif
TABLE_LONG_OPTIONS,
{NULL, 0, NULL, 0},
};
char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
table_style.format = TF_TABLE;
for (;;) {
int c;
c = getopt_long(argc, argv, short_options, long_options, NULL);
if (c == -1) {
break;
}
switch (c) {
case 'h':
usage();
case 'V':
ovs_print_version(0, 0);
exit(EXIT_SUCCESS);
VLOG_OPTION_HANDLERS
DAEMON_OPTION_HANDLERS
TABLE_OPTION_HANDLERS(&table_style)
STREAM_SSL_OPTION_HANDLERS
case OPT_BOOTSTRAP_CA_CERT:
stream_ssl_set_ca_cert_file(optarg, true);
break;
case OPT_TIMESTAMP:
timestamp = true;
break;
case '?':
exit(EXIT_FAILURE);
case 0:
/* getopt_long() already set the value for us. */
break;
default:
abort();
}
}
free(short_options);
}
static void
usage(void)
{
printf("%s: Open vSwitch database JSON-RPC client\n"
"usage: %s [OPTIONS] COMMAND [ARG...]\n"
"\nValid commands are:\n"
"\n list-dbs [SERVER]\n"
" list databases available on SERVER\n"
"\n get-schema [SERVER] [DATABASE]\n"
" retrieve schema for DATABASE from SERVER\n"
"\n get-schema-version [SERVER] [DATABASE]\n"
" retrieve schema for DATABASE from SERVER and report only its\n"
" version number on stdout\n"
"\n list-tables [SERVER] [DATABASE]\n"
" list tables for DATABASE on SERVER\n"
"\n list-columns [SERVER] [DATABASE] [TABLE]\n"
" list columns in TABLE (or all tables) in DATABASE on SERVER\n"
"\n transact [SERVER] TRANSACTION\n"
" run TRANSACTION (a JSON array of operations) on SERVER\n"
" and print the results as JSON on stdout\n"
"\n monitor [SERVER] [DATABASE] TABLE [COLUMN,...]...\n"
" monitor contents of COLUMNs in TABLE in DATABASE on SERVER.\n"
" COLUMNs may include !initial, !insert, !delete, !modify\n"
" to avoid seeing the specified kinds of changes.\n"
"\n monitor-cond [SERVER] [DATABASE] CONDITION TABLE [COLUMN,...]...\n"
" monitor contents that match CONDITION of COLUMNs in TABLE in\n"
" DATABASE on SERVER.\n"
" COLUMNs may include !initial, !insert, !delete, !modify\n"
" to avoid seeing the specified kinds of changes.\n"
"\n monitor [SERVER] [DATABASE] ALL\n"
" monitor all changes to all columns in all tables\n"
" in DATBASE on SERVER.\n"
"\n dump [SERVER] [DATABASE]\n"
" dump contents of DATABASE on SERVER to stdout\n"
"\n lock [SERVER] LOCK\n"
" create or wait for LOCK in SERVER\n"
"\n steal [SERVER] LOCK\n"
" steal LOCK from SERVER\n"
"\n unlock [SERVER] LOCK\n"
" unlock LOCK from SERVER\n"
"\nThe default SERVER is unix:%s/db.sock.\n"
"The default DATABASE is Open_vSwitch.\n",
program_name, program_name, ovs_rundir());
stream_usage("SERVER", true, true, true);
table_usage();
printf(" --timestamp timestamp \"monitor\" output");
daemon_usage();
vlog_usage();
printf("\nOther options:\n"
" -h, --help display this help message\n"
" -V, --version display version information\n");
exit(EXIT_SUCCESS);
}
static void
check_txn(int error, struct jsonrpc_msg **reply_)
{
struct jsonrpc_msg *reply = *reply_;
if (error) {
ovs_fatal(error, "transaction failed");
}
if (reply->error) {
ovs_fatal(error, "transaction returned error: %s",
json_to_string(reply->error, table_style.json_flags));
}
}
static struct json *
parse_json(const char *s)
{
struct json *json = json_from_string(s);
if (json->type == JSON_STRING) {
ovs_fatal(0, "\"%s\": %s", s, json->u.string);
}
return json;
}
static struct jsonrpc *
open_jsonrpc(const char *server)
{
struct stream *stream;
int error;
error = stream_open_block(jsonrpc_stream_open(server, &stream,
DSCP_DEFAULT), &stream);
if (error == EAFNOSUPPORT) {
struct pstream *pstream;
error = jsonrpc_pstream_open(server, &pstream, DSCP_DEFAULT);
if (error) {
ovs_fatal(error, "failed to connect or listen to \"%s\"", server);
}
VLOG_INFO("%s: waiting for connection...", server);
error = pstream_accept_block(pstream, &stream);
if (error) {
ovs_fatal(error, "failed to accept connection on \"%s\"", server);
}
pstream_close(pstream);
} else if (error) {
ovs_fatal(error, "failed to connect to \"%s\"", server);
}
return jsonrpc_open(stream);
}
static void
print_json(struct json *json)
{
char *string = json_to_string(json, table_style.json_flags);
fputs(string, stdout);
free(string);
}
static void
print_and_free_json(struct json *json)
{
print_json(json);
json_destroy(json);
}
static void
check_ovsdb_error(struct ovsdb_error *error)
{
if (error) {
ovs_fatal(0, "%s", ovsdb_error_to_string(error));
}
}
static struct ovsdb_schema *
fetch_schema(struct jsonrpc *rpc, const char *database)
{
struct jsonrpc_msg *request, *reply;
struct ovsdb_schema *schema;
request = jsonrpc_create_request("get_schema",
json_array_create_1(
json_string_create(database)),
NULL);
check_txn(jsonrpc_transact_block(rpc, request, &reply), &reply);
check_ovsdb_error(ovsdb_schema_from_json(reply->result, &schema));
jsonrpc_msg_destroy(reply);
return schema;
}
static void
fetch_dbs(struct jsonrpc *rpc, struct svec *dbs)
{
struct jsonrpc_msg *request, *reply;
size_t i;
request = jsonrpc_create_request("list_dbs", json_array_create_empty(),
NULL);
check_txn(jsonrpc_transact_block(rpc, request, &reply), &reply);
if (reply->result->type != JSON_ARRAY) {
ovs_fatal(0, "list_dbs response is not array");
}
for (i = 0; i < reply->result->u.array.n; i++) {
const struct json *name = reply->result->u.array.elems[i];
if (name->type != JSON_STRING) {
ovs_fatal(0, "list_dbs response %"PRIuSIZE" is not string", i);
}
svec_add(dbs, name->u.string);
}
jsonrpc_msg_destroy(reply);
svec_sort(dbs);
}
static void
do_list_dbs(struct jsonrpc *rpc, const char *database OVS_UNUSED,
int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
const char *db_name;
struct svec dbs;
size_t i;
svec_init(&dbs);
fetch_dbs(rpc, &dbs);
SVEC_FOR_EACH (i, db_name, &dbs) {
puts(db_name);
}
svec_destroy(&dbs);
}
static void
do_get_schema(struct jsonrpc *rpc, const char *database,
int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
struct ovsdb_schema *schema = fetch_schema(rpc, database);
print_and_free_json(ovsdb_schema_to_json(schema));
ovsdb_schema_destroy(schema);
}
static void
do_get_schema_version(struct jsonrpc *rpc, const char *database,
int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
struct ovsdb_schema *schema = fetch_schema(rpc, database);
puts(schema->version);
ovsdb_schema_destroy(schema);
}
static void
do_list_tables(struct jsonrpc *rpc, const char *database,
int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
struct ovsdb_schema *schema;
struct shash_node *node;
struct table t;
schema = fetch_schema(rpc, database);
table_init(&t);
table_add_column(&t, "Table");
SHASH_FOR_EACH (node, &schema->tables) {
struct ovsdb_table_schema *ts = node->data;
table_add_row(&t);
table_add_cell(&t)->text = xstrdup(ts->name);
}
ovsdb_schema_destroy(schema);
table_print(&t, &table_style);
table_destroy(&t);
}
static void
do_list_columns(struct jsonrpc *rpc, const char *database,
int argc OVS_UNUSED, char *argv[])
{
const char *table_name = argv[0];
struct ovsdb_schema *schema;
struct shash_node *table_node;
struct table t;
schema = fetch_schema(rpc, database);
table_init(&t);
if (!table_name) {
table_add_column(&t, "Table");
}
table_add_column(&t, "Column");
table_add_column(&t, "Type");
SHASH_FOR_EACH (table_node, &schema->tables) {
struct ovsdb_table_schema *ts = table_node->data;
if (!table_name || !strcmp(table_name, ts->name)) {
struct shash_node *column_node;
SHASH_FOR_EACH (column_node, &ts->columns) {
const struct ovsdb_column *column = column_node->data;
table_add_row(&t);
if (!table_name) {
table_add_cell(&t)->text = xstrdup(ts->name);
}
table_add_cell(&t)->text = xstrdup(column->name);
table_add_cell(&t)->json = ovsdb_type_to_json(&column->type);
}
}
}
ovsdb_schema_destroy(schema);
table_print(&t, &table_style);
table_destroy(&t);
}
static void
do_transact(struct jsonrpc *rpc, const char *database OVS_UNUSED,
int argc OVS_UNUSED, char *argv[])
{
struct jsonrpc_msg *request, *reply;
struct json *transaction;
transaction = parse_json(argv[0]);
request = jsonrpc_create_request("transact", transaction, NULL);
check_txn(jsonrpc_transact_block(rpc, request, &reply), &reply);
print_json(reply->result);
putchar('\n');
jsonrpc_msg_destroy(reply);
}
/* "monitor" command. */
struct monitored_table {
struct ovsdb_table_schema *table;
struct ovsdb_column_set columns;
};
static void
monitor_print_row(struct json *row, const char *type, const char *uuid,
const struct ovsdb_column_set *columns, struct table *t)
{
size_t i;
if (!row) {
ovs_error(0, "missing %s row", type);
return;
} else if (row->type != JSON_OBJECT) {
ovs_error(0, "<row> is not object");
return;
}
table_add_row(t);
table_add_cell(t)->text = xstrdup(uuid);
table_add_cell(t)->text = xstrdup(type);
for (i = 0; i < columns->n_columns; i++) {
const struct ovsdb_column *column = columns->columns[i];
struct json *value = shash_find_data(json_object(row), column->name);
struct cell *cell = table_add_cell(t);
if (value) {
cell->json = json_clone(value);
cell->type = &column->type;
}
}
}
static void
monitor_print_table(struct json *table_update,
const struct monitored_table *mt, char *caption,
bool initial)
{
const struct ovsdb_table_schema *table = mt->table;
const struct ovsdb_column_set *columns = &mt->columns;
struct shash_node *node;
struct table t;
size_t i;
if (table_update->type != JSON_OBJECT) {
ovs_error(0, "<table-update> for table %s is not object", table->name);
return;
}
table_init(&t);
table_set_timestamp(&t, timestamp);
table_set_caption(&t, caption);
table_add_column(&t, "row");
table_add_column(&t, "action");
for (i = 0; i < columns->n_columns; i++) {
table_add_column(&t, "%s", columns->columns[i]->name);
}
SHASH_FOR_EACH (node, json_object(table_update)) {
struct json *row_update = node->data;
struct json *old, *new;
if (row_update->type != JSON_OBJECT) {
ovs_error(0, "<row-update> is not object");
continue;
}
old = shash_find_data(json_object(row_update), "old");
new = shash_find_data(json_object(row_update), "new");
if (initial) {
monitor_print_row(new, "initial", node->name, columns, &t);
} else if (!old) {
monitor_print_row(new, "insert", node->name, columns, &t);
} else if (!new) {
monitor_print_row(old, "delete", node->name, columns, &t);
} else {
monitor_print_row(old, "old", node->name, columns, &t);
monitor_print_row(new, "new", "", columns, &t);
}
}
table_print(&t, &table_style);
table_destroy(&t);
}
static void
monitor_print(struct json *table_updates,
const struct monitored_table *mts, size_t n_mts,
bool initial)
{
size_t i;
if (table_updates->type != JSON_OBJECT) {
ovs_error(0, "<table-updates> is not object");
return;
}
for (i = 0; i < n_mts; i++) {
const struct monitored_table *mt = &mts[i];
struct json *table_update = shash_find_data(json_object(table_updates),
mt->table->name);
if (table_update) {
monitor_print_table(table_update, mt,
n_mts > 1 ? xstrdup(mt->table->name) : NULL,
initial);
}
}
}
static void
monitor2_print_row(struct json *row, const char *type, const char *uuid,
const struct ovsdb_column_set *columns, struct table *t)
{
if (!strcmp(type, "delete")) {
if (row->type != JSON_NULL) {
ovs_error(0, "delete method does not expect <row>");
return;
}
table_add_row(t);
table_add_cell(t)->text = xstrdup(uuid);
table_add_cell(t)->text = xstrdup(type);
} else {
if (!row || row->type != JSON_OBJECT) {
ovs_error(0, "<row> is not object");
return;
}
monitor_print_row(row, type, uuid, columns, t);
}
}
static void
monitor2_print_table(struct json *table_update2,
const struct monitored_table *mt, char *caption)
{
const struct ovsdb_table_schema *table = mt->table;
const struct ovsdb_column_set *columns = &mt->columns;
struct shash_node *node;
struct table t;
if (table_update2->type != JSON_OBJECT) {
ovs_error(0, "<table-update> for table %s is not object", table->name);
return;
}
table_init(&t);
table_set_timestamp(&t, timestamp);
table_set_caption(&t, caption);
table_add_column(&t, "row");
table_add_column(&t, "action");
for (size_t i = 0; i < columns->n_columns; i++) {
table_add_column(&t, "%s", columns->columns[i]->name);
}
SHASH_FOR_EACH (node, json_object(table_update2)) {
struct json *row_update2 = node->data;
const char *operation;
struct json *row;
const char *ops[] = {"delete", "initial", "modify", "insert"};
if (row_update2->type != JSON_OBJECT) {
ovs_error(0, "<row-update2> is not object");
continue;
}
/* row_update2 contains one of objects indexed by ops[] */
for (int i = 0; i < ARRAY_SIZE(ops); i++) {
operation = ops[i];
row = shash_find_data(json_object(row_update2), operation);
if (row) {
monitor2_print_row(row, operation, node->name, columns, &t);
break;
}
}
}
table_print(&t, &table_style);
table_destroy(&t);
}
static void
monitor2_print(struct json *table_updates2,
const struct monitored_table *mts, size_t n_mts)
{
size_t i;
if (table_updates2->type != JSON_OBJECT) {
ovs_error(0, "<table-updates2> is not object");
return;
}
for (i = 0; i < n_mts; i++) {
const struct monitored_table *mt = &mts[i];
struct json *table_update = shash_find_data(
json_object(table_updates2),
mt->table->name);
if (table_update) {
monitor2_print_table(table_update, mt,
n_mts > 1 ? xstrdup(mt->table->name) : NULL);
}
}
}
static void
add_column(const char *server, const struct ovsdb_column *column,
struct ovsdb_column_set *columns, struct json *columns_json)
{
if (ovsdb_column_set_contains(columns, column->index)) {
ovs_fatal(0, "%s: column \"%s\" mentioned multiple times",
server, column->name);
}
ovsdb_column_set_add(columns, column);
json_array_add(columns_json, json_string_create(column->name));
}
static struct json *
parse_monitor_columns(char *arg, const char *server, const char *database,
const struct ovsdb_table_schema *table,
struct ovsdb_column_set *columns)
{
bool initial, insert, delete, modify;
struct json *mr, *columns_json;
char *save_ptr = NULL;
char *token;
mr = json_object_create();
columns_json = json_array_create_empty();
json_object_put(mr, "columns", columns_json);
initial = insert = delete = modify = true;
for (token = strtok_r(arg, ",", &save_ptr); token != NULL;
token = strtok_r(NULL, ",", &save_ptr)) {
if (!strcmp(token, "!initial")) {
initial = false;
} else if (!strcmp(token, "!insert")) {
insert = false;
} else if (!strcmp(token, "!delete")) {
delete = false;
} else if (!strcmp(token, "!modify")) {
modify = false;
} else {
const struct ovsdb_column *column;
column = ovsdb_table_schema_get_column(table, token);
if (!column) {
ovs_fatal(0, "%s: table \"%s\" in %s does not have a "
"column named \"%s\"",
server, table->name, database, token);
}
add_column(server, column, columns, columns_json);
}
}
if (columns_json->u.array.n == 0) {
const struct shash_node **nodes;
size_t i, n;
n = shash_count(&table->columns);
nodes = shash_sort(&table->columns);
for (i = 0; i < n; i++) {
const struct ovsdb_column *column = nodes[i]->data;
if (column->index != OVSDB_COL_UUID
&& column->index != OVSDB_COL_VERSION) {
add_column(server, column, columns, columns_json);
}
}
free(nodes);
add_column(server, ovsdb_table_schema_get_column(table, "_version"),
columns, columns_json);
}
if (!initial || !insert || !delete || !modify) {
struct json *select = json_object_create();
json_object_put(select, "initial", json_boolean_create(initial));
json_object_put(select, "insert", json_boolean_create(insert));
json_object_put(select, "delete", json_boolean_create(delete));
json_object_put(select, "modify", json_boolean_create(modify));
json_object_put(mr, "select", select);
}
return mr;
}
static void
ovsdb_client_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *exiting_)
{
bool *exiting = exiting_;
*exiting = true;
unixctl_command_reply(conn, NULL);
}
static void
ovsdb_client_block(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *blocked_)
{
bool *blocked = blocked_;
if (!*blocked) {
*blocked = true;
unixctl_command_reply(conn, NULL);
} else {
unixctl_command_reply(conn, "already blocking");
}
}
static void
ovsdb_client_unblock(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *blocked_)
{
bool *blocked = blocked_;
if (*blocked) {
*blocked = false;
unixctl_command_reply(conn, NULL);
} else {
unixctl_command_reply(conn, "already unblocked");
}
}
static void
ovsdb_client_cond_change(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[], void *rpc_)
{
struct jsonrpc *rpc = rpc_;
struct json *monitor_cond_update_requests = json_object_create();
struct json *monitor_cond_update_request = json_object_create();
struct json *params;
struct jsonrpc_msg *request;
json_object_put(monitor_cond_update_request, "where",
json_from_string(argv[2]));
json_object_put(monitor_cond_update_requests,
argv[1],
json_array_create_1(monitor_cond_update_request));
params = json_array_create_3(json_null_create(),json_null_create(),
monitor_cond_update_requests);
request = jsonrpc_create_request("monitor_cond_change", params, NULL);
jsonrpc_send(rpc, request);
VLOG_DBG("cond change %s %s", argv[1], argv[2]);
unixctl_command_reply(conn, "condiiton changed");
}
static void
add_monitored_table(int argc, char *argv[],
const char *server, const char *database,
struct json *condition,
struct ovsdb_table_schema *table,
struct json *monitor_requests,
struct monitored_table **mts,
size_t *n_mts, size_t *allocated_mts)
{
struct json *monitor_request_array, *mr;
struct monitored_table *mt;
if (*n_mts >= *allocated_mts) {
*mts = x2nrealloc(*mts, allocated_mts, sizeof **mts);
}
mt = &(*mts)[(*n_mts)++];
mt->table = table;
ovsdb_column_set_init(&mt->columns);
monitor_request_array = json_array_create_empty();
if (argc > 1) {
int i;
for (i = 1; i < argc; i++) {
mr = parse_monitor_columns(argv[i], server, database, table,
&mt->columns);
if (i == 1 && condition) {
json_object_put(mr, "where", condition);
}
json_array_add(monitor_request_array, mr);
}
} else {
/* Allocate a writable empty string since parse_monitor_columns()
* is going to strtok() it and that's risky with literal "". */
char empty[] = "";
mr = parse_monitor_columns(empty, server, database,
table, &mt->columns);
if (condition) {
json_object_put(mr, "where", condition);
}
json_array_add(monitor_request_array, mr);
}
json_object_put(monitor_requests, table->name, monitor_request_array);
}
static void
destroy_monitored_table(struct monitored_table *mts, size_t n)
{
int i;
for (i = 0; i < n; i++) {
struct monitored_table *mt = &mts[i];
ovsdb_column_set_destroy(&mt->columns);
}
free(mts);
}
static void
do_monitor__(struct jsonrpc *rpc, const char *database,
enum ovsdb_monitor_version version,
int argc, char *argv[], struct json *condition)
{
const char *server = jsonrpc_get_name(rpc);
const char *table_name = argv[0];
struct unixctl_server *unixctl;
struct ovsdb_schema *schema;
struct jsonrpc_msg *request;
struct json *monitor, *monitor_requests, *request_id;
bool exiting = false;
bool blocked = false;
struct monitored_table *mts;
size_t n_mts, allocated_mts;
ovs_assert(version < OVSDB_MONITOR_VERSION_MAX);
daemon_save_fd(STDOUT_FILENO);
daemonize_start(false);
if (get_detach()) {
int error;
error = unixctl_server_create(NULL, &unixctl);
if (error) {
ovs_fatal(error, "failed to create unixctl server");
}
unixctl_command_register("exit", "", 0, 0,
ovsdb_client_exit, &exiting);
unixctl_command_register("ovsdb-client/block", "", 0, 0,
ovsdb_client_block, &blocked);
unixctl_command_register("ovsdb-client/unblock", "", 0, 0,
ovsdb_client_unblock, &blocked);
unixctl_command_register("ovsdb-client/cond_change", "TABLE COND", 2, 2,
ovsdb_client_cond_change, rpc);
} else {
unixctl = NULL;
}
schema = fetch_schema(rpc, database);
monitor_requests = json_object_create();
mts = NULL;
n_mts = allocated_mts = 0;
if (strcmp(table_name, "ALL")) {
struct ovsdb_table_schema *table;
table = shash_find_data(&schema->tables, table_name);
if (!table) {
ovs_fatal(0, "%s: %s does not have a table named \"%s\"",
server, database, table_name);
}
add_monitored_table(argc, argv, server, database, condition, table,
monitor_requests, &mts, &n_mts, &allocated_mts);
} else {
size_t n = shash_count(&schema->tables);
const struct shash_node **nodes = shash_sort(&schema->tables);
size_t i;
if (condition) {
ovs_fatal(0, "ALL tables are not allowed with condition");
}