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qemu-config: parse configuration files to a QDict

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Change the parser to put the values into a QDict and pass them
to a callback.  qemu_config_parse's QemuOpts creation is
itself turned into a callback function.

This is useful for -readconfig to support keyval-based options;
getting a QDict from the parser removes a roundtrip from
QDict to QemuOpts and then back to QDict.

Unfortunately there is a disadvantage in that semantic errors will
point to the last line of the group, because the entries of the QDict
do not have a location attached.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210524105752.3318299-2-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-05-24 06:57:50 -04:00
parent 4db4385a7a
commit 3770141139
3 changed files with 76 additions and 33 deletions
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4
softmmu/vl.c
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@ -2133,7 +2133,7 @@ static void qemu_read_default_config_file(Error **errp)
int ret;
g_autofree char *file = get_relocated_path(CONFIG_QEMU_CONFDIR "/qemu.conf");
ret = qemu_read_config_file(file, errp);
ret = qemu_read_config_file(file, qemu_config_do_parse, errp);
if (ret < 0) {
if (ret == -ENOENT) {
error_free(*errp);
@ -3399,7 +3399,7 @@ void qemu_init(int argc, char **argv, char **envp)
qemu_plugin_opt_parse(optarg, &plugin_list);
break;
case QEMU_OPTION_readconfig:
qemu_read_config_file(optarg, &error_fatal);
qemu_read_config_file(optarg, qemu_config_do_parse, &error_fatal);
break;
case QEMU_OPTION_spice:
olist = qemu_find_opts_err("spice", NULL);