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/*
* QEMU storage daemon
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (c) 2019 Kevin Wolf <kwolf@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include <getopt.h>
#include "block/block.h"
#include "crypto/init.h"
#include "qapi/error.h"
#include "qapi/qapi-visit-block-core.h"
#include "qapi/qapi-commands-block-core.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qobject-input-visitor.h"
#include "qemu-common.h"
#include "qemu-version.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/help_option.h"
#include "qemu/log.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qom/object_interfaces.h"
#include "trace/control.h"
static void help(void)
{
printf(
"Usage: %s [options]\n"
"QEMU storage daemon\n"
"\n"
" -h, --help display this help and exit\n"
" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n"
" -V, --version output version information and exit\n"
"\n"
" --blockdev [driver=]<driver>[,node-name=<N>][,discard=ignore|unmap]\n"
" [,cache.direct=on|off][,cache.no-flush=on|off]\n"
" [,read-only=on|off][,auto-read-only=on|off]\n"
" [,force-share=on|off][,detect-zeroes=on|off|unmap]\n"
" [,driver specific parameters...]\n"
" configure a block backend\n"
"\n"
" --object help list object types that can be added\n"
" --object <type>,help list properties for the given object type\n"
" --object <type>[,<property>=<value>...]\n"
" create a new object of type <type>, setting\n"
" properties in the order they are specified. Note\n"
" that the 'id' property must be set.\n"
" See the qemu(1) man page for documentation of the\n"
" objects that can be added.\n"
"\n"
QEMU_HELP_BOTTOM "\n",
error_get_progname());
}
enum {
OPTION_BLOCKDEV = 256,
OPTION_OBJECT,
};
static QemuOptsList qemu_object_opts = {
.name = "object",
.implied_opt_name = "qom-type",
.head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
.desc = {
{ }
},
};
static void process_options(int argc, char *argv[])
{
int c;
static const struct option long_options[] = {
{"blockdev", required_argument, NULL, OPTION_BLOCKDEV},
{"help", no_argument, NULL, 'h'},
{"object", required_argument, NULL, OPTION_OBJECT},
{"trace", required_argument, NULL, 'T'},
{"version", no_argument, NULL, 'V'},
{0, 0, 0, 0}
};
/*
* In contrast to the system emulator, options are processed in the order
* they are given on the command lines. This means that things must be
* defined first before they can be referenced in another option.
*/
while ((c = getopt_long(argc, argv, "hT:V", long_options, NULL)) != -1) {
switch (c) {
case '?':
exit(EXIT_FAILURE);
case 'h':
help();
exit(EXIT_SUCCESS);
case 'T':
{
char *trace_file = trace_opt_parse(optarg);
trace_init_file(trace_file);
g_free(trace_file);
break;
}
case 'V':
printf("qemu-storage-daemon version "
QEMU_FULL_VERSION "\n" QEMU_COPYRIGHT "\n");
exit(EXIT_SUCCESS);
case OPTION_BLOCKDEV:
{
Visitor *v;
BlockdevOptions *options;
v = qobject_input_visitor_new_str(optarg, "driver",
&error_fatal);
visit_type_BlockdevOptions(v, NULL, &options, &error_fatal);
visit_free(v);
qmp_blockdev_add(options, &error_fatal);
qapi_free_BlockdevOptions(options);
break;
}
case OPTION_OBJECT:
{
QemuOpts *opts;
const char *type;
QDict *args;
QObject *ret_data = NULL;
/* FIXME The keyval parser rejects 'help' arguments, so we must
* unconditionall try QemuOpts first. */
opts = qemu_opts_parse(&qemu_object_opts,
optarg, true, &error_fatal);
type = qemu_opt_get(opts, "qom-type");
if (type && user_creatable_print_help(type, opts)) {
exit(EXIT_SUCCESS);
}
qemu_opts_del(opts);
args = keyval_parse(optarg, "qom-type", &error_fatal);
qmp_object_add(args, &ret_data, &error_fatal);
qobject_unref(args);
qobject_unref(ret_data);
break;
}
default:
g_assert_not_reached();
}
}
if (optind != argc) {
error_report("Unexpected argument: %s", argv[optind]);
exit(EXIT_FAILURE);
}
}
int main(int argc, char *argv[])
{
#ifdef CONFIG_POSIX
signal(SIGPIPE, SIG_IGN);
#endif
error_init(argv[0]);
qemu_init_exec_dir(argv[0]);
module_call_init(MODULE_INIT_QOM);
module_call_init(MODULE_INIT_TRACE);
qemu_add_opts(&qemu_trace_opts);
qcrypto_init(&error_fatal);
bdrv_init();
if (!trace_init_backends()) {
return EXIT_FAILURE;
}
qemu_set_log(LOG_TRACE);
qemu_init_main_loop(&error_fatal);
process_options(argc, argv);
return EXIT_SUCCESS;
}
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