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From 8eef1078eff6fc5cc045684486d228153463dac2 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 18 May 2021 11:40:58 -0400
Subject: [PATCH 4/5] vl: plumb keyval-based options into -readconfig
Let -readconfig support parsing command line options into QDict or
QemuOpts. This will be used to add back support for objects in
-readconfig.
Cc: Markus Armbruster <armbru@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210524105752.3318299-3-pbonzini@redhat.com>
---
include/block/qdict.h | 2 -
include/qapi/qmp/qdict.h | 3 ++
softmmu/vl.c | 83 ++++++++++++++++++++++++++++------------
3 files changed, 62 insertions(+), 26 deletions(-)
diff --git a/include/block/qdict.h b/include/block/qdict.h
index d8cb502..ced2acf 100644
--- a/include/block/qdict.h
+++ b/include/block/qdict.h
@@ -20,8 +20,6 @@ void qdict_join(QDict *dest, QDict *src, bool overwrite);
void qdict_extract_subqdict(QDict *src, QDict **dst, const char *start);
void qdict_array_split(QDict *src, QList **dst);
int qdict_array_entries(QDict *src, const char *subqdict);
-QObject *qdict_crumple(const QDict *src, Error **errp);
-void qdict_flatten(QDict *qdict);
typedef struct QDictRenames {
const char *from;
diff --git a/include/qapi/qmp/qdict.h b/include/qapi/qmp/qdict.h
index 9934539..d5b5430 100644
--- a/include/qapi/qmp/qdict.h
+++ b/include/qapi/qmp/qdict.h
@@ -64,4 +64,7 @@ const char *qdict_get_try_str(const QDict *qdict, const char *key);
QDict *qdict_clone_shallow(const QDict *src);
+QObject *qdict_crumple(const QDict *src, Error **errp);
+void qdict_flatten(QDict *qdict);
+
#endif /* QDICT_H */
diff --git a/softmmu/vl.c b/softmmu/vl.c
index da5042f..48d1f06 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -122,6 +122,7 @@
#include "qapi/qapi-commands-misc.h"
#include "qapi/qapi-visit-qom.h"
#include "qapi/qapi-commands-ui.h"
+#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/iothread.h"
#include "qemu/guest-random.h"
@@ -2113,13 +2114,53 @@ static int global_init_func(void *opaque, QemuOpts *opts, Error **errp)
return 0;
}
+/*
+ * Return whether configuration group @group is stored in QemuOpts, or
+ * recorded as one or more QDicts by qemu_record_config_group.
+ */
+static bool is_qemuopts_group(const char *group)
+{
+ return true;
+}
+
+static void qemu_record_config_group(const char *group, QDict *dict,
+ bool from_json, Error **errp)
+{
+ abort();
+}
+
+/*
+ * Parse non-QemuOpts config file groups, pass the rest to
+ * qemu_config_do_parse.
+ */
+static void qemu_parse_config_group(const char *group, QDict *qdict,
+ void *opaque, Error **errp)
+{
+ QObject *crumpled;
+ if (is_qemuopts_group(group)) {
+ qemu_config_do_parse(group, qdict, opaque, errp);
+ return;
+ }
+
+ crumpled = qdict_crumple(qdict, errp);
+ if (!crumpled) {
+ return;
+ }
+ if (qobject_type(crumpled) != QTYPE_QDICT) {
+ assert(qobject_type(crumpled) == QTYPE_QLIST);
+ error_setg(errp, "Lists cannot be at top level of a configuration section");
+ return;
+ }
+ qemu_record_config_group(group, qobject_to(QDict, crumpled), false, errp);
+}
+
static void qemu_read_default_config_file(Error **errp)
{
ERRP_GUARD();
int ret;
g_autofree char *file = get_relocated_path(CONFIG_QEMU_CONFDIR "/qemu.conf");
- ret = qemu_read_config_file(file, qemu_config_do_parse, errp);
+ ret = qemu_read_config_file(file, qemu_parse_config_group, errp);
if (ret < 0) {
if (ret == -ENOENT) {
error_free(*errp);
@@ -2128,9 +2169,8 @@ static void qemu_read_default_config_file(Error **errp)
}
}
-static int qemu_set_option(const char *str)
+static void qemu_set_option(const char *str, Error **errp)
{
- Error *local_err = NULL;
char group[64], id[64], arg[64];
QemuOptsList *list;
QemuOpts *opts;
@@ -2138,27 +2178,23 @@ static int qemu_set_option(const char *str)
rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
if (rc < 3 || str[offset] != '=') {
- error_report("can't parse: \"%s\"", str);
- return -1;
- }
-
- list = qemu_find_opts(group);
- if (list == NULL) {
- return -1;
- }
-
- opts = qemu_opts_find(list, id);
- if (!opts) {
- error_report("there is no %s \"%s\" defined",
- list->name, id);
- return -1;
+ error_setg(errp, "can't parse: \"%s\"", str);
+ return;
}
- if (!qemu_opt_set(opts, arg, str + offset + 1, &local_err)) {
- error_report_err(local_err);
- return -1;
+ if (!is_qemuopts_group(group)) {
+ error_setg(errp, "-set is not supported with %s", group);
+ } else {
+ list = qemu_find_opts_err(group, errp);
+ if (list) {
+ opts = qemu_opts_find(list, id);
+ if (!opts) {
+ error_setg(errp, "there is no %s \"%s\" defined", group, id);
+ return;
+ }
+ qemu_opt_set(opts, arg, str + offset + 1, errp);
+ }
}
- return 0;
}
static void user_register_global_props(void)
@@ -2752,8 +2788,7 @@ void qemu_init(int argc, char **argv, char **envp)
}
break;
case QEMU_OPTION_set:
- if (qemu_set_option(optarg) != 0)
- exit(1);
+ qemu_set_option(optarg, &error_fatal);
break;
case QEMU_OPTION_global:
if (qemu_global_option(optarg) != 0)
@@ -3385,7 +3420,7 @@ 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, qemu_config_do_parse, &error_fatal);
+ qemu_read_config_file(optarg, qemu_parse_config_group, &error_fatal);
break;
case QEMU_OPTION_spice:
olist = qemu_find_opts_err("spice", NULL);
--
2.31.1
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