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![Markus Armbruster](/assets/img/avatar_default.png)
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20230207075115.1525-2-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
496 lines
14 KiB
C
496 lines
14 KiB
C
#include "qemu/osdep.h"
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#include "block/qdict.h" /* for qdict_extract_subqdict() */
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#include "qapi/error.h"
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#include "qapi/qapi-commands-misc.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi/qmp/qlist.h"
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#include "qemu/error-report.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "hw/boards.h"
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static QemuOptsList *vm_config_groups[48];
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static QemuOptsList *drive_config_groups[5];
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static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
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Error **errp)
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{
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int i;
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qemu_load_module_for_opts(group);
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for (i = 0; lists[i] != NULL; i++) {
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if (strcmp(lists[i]->name, group) == 0)
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break;
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}
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if (lists[i] == NULL) {
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error_setg(errp, "There is no option group '%s'", group);
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}
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return lists[i];
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}
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QemuOptsList *qemu_find_opts(const char *group)
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{
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QemuOptsList *ret;
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Error *local_err = NULL;
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ret = find_list(vm_config_groups, group, &local_err);
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if (local_err) {
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error_report_err(local_err);
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}
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return ret;
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}
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QemuOpts *qemu_find_opts_singleton(const char *group)
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{
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QemuOptsList *list;
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QemuOpts *opts;
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list = qemu_find_opts(group);
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assert(list);
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opts = qemu_opts_find(list, NULL);
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if (!opts) {
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opts = qemu_opts_create(list, NULL, 0, &error_abort);
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}
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return opts;
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}
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static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
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{
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CommandLineParameterInfoList *param_list = NULL;
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CommandLineParameterInfo *info;
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int i;
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for (i = 0; desc[i].name != NULL; i++) {
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info = g_malloc0(sizeof(*info));
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info->name = g_strdup(desc[i].name);
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switch (desc[i].type) {
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case QEMU_OPT_STRING:
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info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
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break;
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case QEMU_OPT_BOOL:
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info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
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break;
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case QEMU_OPT_NUMBER:
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info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
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break;
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case QEMU_OPT_SIZE:
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info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
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break;
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}
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info->help = g_strdup(desc[i].help);
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info->q_default = g_strdup(desc[i].def_value_str);
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QAPI_LIST_PREPEND(param_list, info);
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}
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return param_list;
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}
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/* remove repeated entry from the info list */
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static void cleanup_infolist(CommandLineParameterInfoList *head)
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{
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CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
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cur = head;
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while (cur->next) {
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pre_entry = head;
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while (pre_entry != cur->next) {
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if (!strcmp(pre_entry->value->name, cur->next->value->name)) {
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del_entry = cur->next;
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cur->next = cur->next->next;
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del_entry->next = NULL;
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qapi_free_CommandLineParameterInfoList(del_entry);
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break;
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}
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pre_entry = pre_entry->next;
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}
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cur = cur->next;
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}
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}
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/* merge the description items of two parameter infolists */
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static void connect_infolist(CommandLineParameterInfoList *head,
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CommandLineParameterInfoList *new)
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{
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CommandLineParameterInfoList *cur;
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cur = head;
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while (cur->next) {
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cur = cur->next;
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}
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cur->next = new;
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}
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/* access all the local QemuOptsLists for drive option */
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static CommandLineParameterInfoList *get_drive_infolist(void)
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{
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CommandLineParameterInfoList *head = NULL, *cur;
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int i;
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for (i = 0; drive_config_groups[i] != NULL; i++) {
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if (!head) {
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head = query_option_descs(drive_config_groups[i]->desc);
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} else {
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cur = query_option_descs(drive_config_groups[i]->desc);
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connect_infolist(head, cur);
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}
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}
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cleanup_infolist(head);
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return head;
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}
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static CommandLineParameterInfo *objprop_to_cmdline_prop(ObjectProperty *prop)
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{
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CommandLineParameterInfo *info;
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info = g_malloc0(sizeof(*info));
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info->name = g_strdup(prop->name);
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if (g_str_equal(prop->type, "bool") || g_str_equal(prop->type, "OnOffAuto")) {
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info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
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} else if (g_str_equal(prop->type, "int")) {
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info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
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} else if (g_str_equal(prop->type, "size")) {
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info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
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} else {
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info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
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}
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if (prop->description) {
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info->help = g_strdup(prop->description);
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}
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return info;
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}
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static CommandLineParameterInfoList *query_all_machine_properties(void)
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{
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CommandLineParameterInfoList *params = NULL, *clpiter;
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CommandLineParameterInfo *info;
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GSList *machines, *curr_mach;
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ObjectPropertyIterator op_iter;
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ObjectProperty *prop;
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bool is_new;
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machines = object_class_get_list(TYPE_MACHINE, false);
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assert(machines);
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/* Loop over all machine classes */
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for (curr_mach = machines; curr_mach; curr_mach = curr_mach->next) {
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object_class_property_iter_init(&op_iter, curr_mach->data);
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/* ... and over the properties of each machine: */
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while ((prop = object_property_iter_next(&op_iter))) {
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if (!prop->set) {
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continue;
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}
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/*
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* Check whether the property has already been put into the list
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* (via another machine class)
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*/
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is_new = true;
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for (clpiter = params; clpiter != NULL; clpiter = clpiter->next) {
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if (g_str_equal(clpiter->value->name, prop->name)) {
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is_new = false;
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break;
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}
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}
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/* If it hasn't been added before, add it now to the list */
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if (is_new) {
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info = objprop_to_cmdline_prop(prop);
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QAPI_LIST_PREPEND(params, info);
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}
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}
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}
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g_slist_free(machines);
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/* Add entry for the "type" parameter */
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info = g_malloc0(sizeof(*info));
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info->name = g_strdup("type");
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info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
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info->help = g_strdup("machine type");
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QAPI_LIST_PREPEND(params, info);
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return params;
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}
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CommandLineOptionInfoList *qmp_query_command_line_options(const char *option,
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Error **errp)
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{
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CommandLineOptionInfoList *conf_list = NULL;
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CommandLineOptionInfo *info;
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int i;
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for (i = 0; vm_config_groups[i] != NULL; i++) {
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if (!option || !strcmp(option, vm_config_groups[i]->name)) {
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info = g_malloc0(sizeof(*info));
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info->option = g_strdup(vm_config_groups[i]->name);
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if (!strcmp("drive", vm_config_groups[i]->name)) {
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info->parameters = get_drive_infolist();
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} else {
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info->parameters =
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query_option_descs(vm_config_groups[i]->desc);
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}
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QAPI_LIST_PREPEND(conf_list, info);
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}
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}
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if (!option || !strcmp(option, "machine")) {
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info = g_malloc0(sizeof(*info));
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info->option = g_strdup("machine");
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info->parameters = query_all_machine_properties();
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QAPI_LIST_PREPEND(conf_list, info);
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}
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if (conf_list == NULL) {
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error_setg(errp, "invalid option name: %s", option);
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}
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return conf_list;
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}
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QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
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{
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return find_list(vm_config_groups, group, errp);
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}
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void qemu_add_drive_opts(QemuOptsList *list)
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{
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int entries, i;
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entries = ARRAY_SIZE(drive_config_groups);
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entries--; /* keep list NULL terminated */
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for (i = 0; i < entries; i++) {
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if (drive_config_groups[i] == NULL) {
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drive_config_groups[i] = list;
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return;
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}
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}
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fprintf(stderr, "ran out of space in drive_config_groups");
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abort();
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}
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void qemu_add_opts(QemuOptsList *list)
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{
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int entries, i;
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entries = ARRAY_SIZE(vm_config_groups);
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entries--; /* keep list NULL terminated */
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for (i = 0; i < entries; i++) {
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if (vm_config_groups[i] == NULL) {
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vm_config_groups[i] = list;
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return;
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}
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}
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fprintf(stderr, "ran out of space in vm_config_groups");
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abort();
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}
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/* Returns number of config groups on success, -errno on error */
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static int qemu_config_foreach(FILE *fp, QEMUConfigCB *cb, void *opaque,
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const char *fname, Error **errp)
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{
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ERRP_GUARD();
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char line[1024], prev_group[64], group[64], arg[64], value[1024];
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Location loc;
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QDict *qdict = NULL;
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int res = -EINVAL, lno = 0;
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int count = 0;
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loc_push_none(&loc);
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while (fgets(line, sizeof(line), fp) != NULL) {
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++lno;
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if (line[0] == '\n') {
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/* skip empty lines */
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continue;
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}
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if (line[0] == '#') {
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/* comment */
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continue;
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}
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if (line[0] == '[') {
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QDict *prev = qdict;
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if (sscanf(line, "[%63s \"%63[^\"]\"]", group, value) == 2) {
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qdict = qdict_new();
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qdict_put_str(qdict, "id", value);
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count++;
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} else if (sscanf(line, "[%63[^]]]", group) == 1) {
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qdict = qdict_new();
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count++;
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}
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if (qdict != prev) {
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if (prev) {
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cb(prev_group, prev, opaque, errp);
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qobject_unref(prev);
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if (*errp) {
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goto out;
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}
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}
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strcpy(prev_group, group);
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continue;
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}
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}
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loc_set_file(fname, lno);
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value[0] = '\0';
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if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 ||
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sscanf(line, " %63s = \"\"", arg) == 1) {
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/* arg = value */
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if (qdict == NULL) {
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error_setg(errp, "no group defined");
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goto out;
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}
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qdict_put_str(qdict, arg, value);
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continue;
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}
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error_setg(errp, "parse error");
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goto out;
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}
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if (ferror(fp)) {
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loc_pop(&loc);
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error_setg_errno(errp, errno, "Cannot read config file");
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goto out_no_loc;
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}
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res = count;
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if (qdict) {
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cb(group, qdict, opaque, errp);
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}
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out:
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loc_pop(&loc);
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out_no_loc:
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qobject_unref(qdict);
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return res;
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}
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void qemu_config_do_parse(const char *group, QDict *qdict, void *opaque, Error **errp)
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{
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QemuOptsList **lists = opaque;
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QemuOptsList *list;
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list = find_list(lists, group, errp);
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if (!list) {
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return;
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}
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qemu_opts_from_qdict(list, qdict, errp);
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}
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int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp)
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{
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return qemu_config_foreach(fp, qemu_config_do_parse, lists, fname, errp);
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}
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int qemu_read_config_file(const char *filename, QEMUConfigCB *cb, Error **errp)
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{
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FILE *f = fopen(filename, "r");
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int ret;
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if (f == NULL) {
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error_setg_file_open(errp, errno, filename);
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return -errno;
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}
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ret = qemu_config_foreach(f, cb, vm_config_groups, filename, errp);
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fclose(f);
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return ret;
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}
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static bool config_parse_qdict_section(QDict *options, QemuOptsList *opts,
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Error **errp)
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{
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QemuOpts *subopts;
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g_autoptr(QDict) subqdict = NULL;
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g_autoptr(QList) list = NULL;
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size_t orig_size, enum_size;
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char *prefix;
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prefix = g_strdup_printf("%s.", opts->name);
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qdict_extract_subqdict(options, &subqdict, prefix);
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g_free(prefix);
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orig_size = qdict_size(subqdict);
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if (!orig_size) {
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return true;
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}
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subopts = qemu_opts_create(opts, NULL, 0, errp);
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if (!subopts) {
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return false;
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}
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if (!qemu_opts_absorb_qdict(subopts, subqdict, errp)) {
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return false;
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}
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enum_size = qdict_size(subqdict);
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if (enum_size < orig_size && enum_size) {
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error_setg(errp, "Unknown option '%s' for [%s]",
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qdict_first(subqdict)->key, opts->name);
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return false;
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}
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if (enum_size) {
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/* Multiple, enumerated sections */
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QListEntry *list_entry;
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unsigned i = 0;
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/* Not required anymore */
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qemu_opts_del(subopts);
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qdict_array_split(subqdict, &list);
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if (qdict_size(subqdict)) {
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error_setg(errp, "Unused option '%s' for [%s]",
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qdict_first(subqdict)->key, opts->name);
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return false;
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}
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QLIST_FOREACH_ENTRY(list, list_entry) {
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QDict *section = qobject_to(QDict, qlist_entry_obj(list_entry));
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char *opt_name;
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if (!section) {
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error_setg(errp, "[%s] section (index %u) does not consist of "
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"keys", opts->name, i);
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return false;
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}
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opt_name = g_strdup_printf("%s.%u", opts->name, i++);
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subopts = qemu_opts_create(opts, opt_name, 1, errp);
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g_free(opt_name);
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if (!subopts) {
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return false;
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}
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if (!qemu_opts_absorb_qdict(subopts, section, errp)) {
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qemu_opts_del(subopts);
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return false;
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}
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if (qdict_size(section)) {
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error_setg(errp, "[%s] section doesn't support the option '%s'",
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opts->name, qdict_first(section)->key);
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qemu_opts_del(subopts);
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return false;
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}
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}
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}
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return true;
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}
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bool qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
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Error **errp)
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{
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int i;
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for (i = 0; lists[i]; i++) {
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if (!config_parse_qdict_section(options, lists[i], errp)) {
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return false;
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}
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}
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return true;
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}
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