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monitor: New argument type 'O'

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In the human monitor, it declares a single optional argument to be
parsed according to the QemuOptsList given by its name.

In QMP, it declares an optional argument for each member of the
QemuOptsList.

Restriction: only lists with empty desc are supported for now.  Good
enough for the job at hand.  We'll lift the restriction when we need
that.
This commit is contained in:
Markus Armbruster 2010-02-10 20:24:35 +01:00
parent 304329eea0
commit 361127dfb4
1 changed files with 50 additions and 4 deletions
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54
monitor.c
View file

@ -67,6 +67,11 @@
* 'F' filename
* 'B' block device name
* 's' string (accept optional quote)
* 'O' option string of the form NAME=VALUE,...
* parsed according to QemuOptsList given by its name
* Example: 'device:O' uses qemu_device_opts.
* Restriction: only lists with empty desc are supported
* TODO lift the restriction
* 'i' 32 bit integer
* 'l' target long (32 or 64 bit)
* 'M' just like 'l', except in user mode the value is
@ -3645,6 +3650,31 @@ static const mon_cmd_t *monitor_parse_command(Monitor *mon,
qdict_put(qdict, key, qstring_from_str(buf));
}
break;
case 'O':
{
QemuOptsList *opts_list;
QemuOpts *opts;
opts_list = qemu_find_opts(key);
if (!opts_list || opts_list->desc->name) {
goto bad_type;
}
while (qemu_isspace(*p)) {
p++;
}
if (!*p)
break;
if (get_str(buf, sizeof(buf), &p) < 0) {
goto fail;
}
opts = qemu_opts_parse(opts_list, buf, 1);
if (!opts) {
goto fail;
}
qemu_opts_to_qdict(opts, qdict);
qemu_opts_del(opts);
}
break;
case '/':
{
int count, format, size;
@ -4299,6 +4329,7 @@ static int check_arg(const CmdArgs *cmd_args, QDict *args)
qint_from_int(qbool_get_int(qobject_to_qbool(value))));
}
break;
case 'O':
default:
/* impossible */
abort();
@ -4313,6 +4344,12 @@ static void cmd_args_init(CmdArgs *cmd_args)
cmd_args->type = cmd_args->flag = cmd_args->optional = 0;
}
static int check_opts(QemuOptsList *opts_list, QDict *args)
{
assert(!opts_list->desc->name);
return 0;
}
/*
* This is not trivial, we have to parse Monitor command's argument
* type syntax to be able to check the arguments provided by clients.
@ -4325,6 +4362,7 @@ static int monitor_check_qmp_args(const mon_cmd_t *cmd, QDict *args)
int err;
const char *p;
CmdArgs cmd_args;
QemuOptsList *opts_list;
if (cmd->args_type == NULL) {
return (qdict_size(args) == 0 ? 0 : -1);
@ -4332,6 +4370,7 @@ static int monitor_check_qmp_args(const mon_cmd_t *cmd, QDict *args)
err = 0;
cmd_args_init(&cmd_args);
opts_list = NULL;
for (p = cmd->args_type;; p++) {
if (*p == ':') {
@ -4340,16 +4379,23 @@ static int monitor_check_qmp_args(const mon_cmd_t *cmd, QDict *args)
if (cmd_args.type == '-') {
cmd_args.flag = *p++;
cmd_args.optional = 1;
} else if (cmd_args.type == 'O') {
opts_list = qemu_find_opts(qstring_get_str(cmd_args.name));
assert(opts_list);
} else if (*p == '?') {
cmd_args.optional = 1;
p++;
}
assert(*p == ',' || *p == '\0');
err = check_arg(&cmd_args, args);
QDECREF(cmd_args.name);
cmd_args_init(&cmd_args);
if (opts_list) {
err = check_opts(opts_list, args);
opts_list = NULL;
} else {
err = check_arg(&cmd_args, args);
QDECREF(cmd_args.name);
cmd_args_init(&cmd_args);
}
if (err < 0) {
break;