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qemu-irix/util/qemu-config.c

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9.3 KiB
C
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#include "qemu-common.h"
#include "qemu/error-report.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qapi/qmp/qerror.h"
#include "hw/qdev.h"
#include "qapi/error.h"
#include "qmp-commands.h"
static QemuOptsList *vm_config_groups[32];
static QemuOptsList *drive_config_groups[4];
static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
Error **errp)
{
int i;
for (i = 0; lists[i] != NULL; i++) {
if (strcmp(lists[i]->name, group) == 0)
break;
}
if (lists[i] == NULL) {
error_set(errp, QERR_INVALID_OPTION_GROUP, group);
}
return lists[i];
}
QemuOptsList *qemu_find_opts(const char *group)
{
QemuOptsList *ret;
Error *local_err = NULL;
ret = find_list(vm_config_groups, group, &local_err);
if (error_is_set(&local_err)) {
error_report("%s", error_get_pretty(local_err));
error_free(local_err);
}
return ret;
}
static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
{
CommandLineParameterInfoList *param_list = NULL, *entry;
CommandLineParameterInfo *info;
int i;
for (i = 0; desc[i].name != NULL; i++) {
info = g_malloc0(sizeof(*info));
info->name = g_strdup(desc[i].name);
switch (desc[i].type) {
case QEMU_OPT_STRING:
info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
break;
case QEMU_OPT_BOOL:
info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
break;
case QEMU_OPT_NUMBER:
info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
break;
case QEMU_OPT_SIZE:
info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
break;
}
if (desc[i].help) {
info->has_help = true;
info->help = g_strdup(desc[i].help);
}
entry = g_malloc0(sizeof(*entry));
entry->value = info;
entry->next = param_list;
param_list = entry;
}
return param_list;
}
/* remove repeated entry from the info list */
static void cleanup_infolist(CommandLineParameterInfoList *head)
{
CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
cur = head;
while (cur->next) {
pre_entry = head;
while (pre_entry != cur->next) {
if (!strcmp(pre_entry->value->name, cur->next->value->name)) {
del_entry = cur->next;
cur->next = cur->next->next;
g_free(del_entry);
break;
}
pre_entry = pre_entry->next;
}
cur = cur->next;
}
}
/* merge the description items of two parameter infolists */
static void connect_infolist(CommandLineParameterInfoList *head,
CommandLineParameterInfoList *new)
{
CommandLineParameterInfoList *cur;
cur = head;
while (cur->next) {
cur = cur->next;
}
cur->next = new;
}
/* access all the local QemuOptsLists for drive option */
static CommandLineParameterInfoList *get_drive_infolist(void)
{
CommandLineParameterInfoList *head = NULL, *cur;
int i;
for (i = 0; drive_config_groups[i] != NULL; i++) {
if (!head) {
head = query_option_descs(drive_config_groups[i]->desc);
} else {
cur = query_option_descs(drive_config_groups[i]->desc);
connect_infolist(head, cur);
}
}
cleanup_infolist(head);
return head;
}
CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
const char *option,
Error **errp)
{
CommandLineOptionInfoList *conf_list = NULL, *entry;
CommandLineOptionInfo *info;
int i;
for (i = 0; vm_config_groups[i] != NULL; i++) {
if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
info = g_malloc0(sizeof(*info));
info->option = g_strdup(vm_config_groups[i]->name);
if (!strcmp("drive", vm_config_groups[i]->name)) {
info->parameters = get_drive_infolist();
} else {
info->parameters =
query_option_descs(vm_config_groups[i]->desc);
}
entry = g_malloc0(sizeof(*entry));
entry->value = info;
entry->next = conf_list;
conf_list = entry;
}
}
if (conf_list == NULL) {
error_setg(errp, "invalid option name: %s", option);
}
return conf_list;
}
QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
{
return find_list(vm_config_groups, group, errp);
}
void qemu_add_drive_opts(QemuOptsList *list)
{
int entries, i;
entries = ARRAY_SIZE(drive_config_groups);
entries--; /* keep list NULL terminated */
for (i = 0; i < entries; i++) {
if (drive_config_groups[i] == NULL) {
drive_config_groups[i] = list;
return;
}
}
fprintf(stderr, "ran out of space in drive_config_groups");
abort();
}
void qemu_add_opts(QemuOptsList *list)
{
int entries, i;
entries = ARRAY_SIZE(vm_config_groups);
entries--; /* keep list NULL terminated */
for (i = 0; i < entries; i++) {
if (vm_config_groups[i] == NULL) {
vm_config_groups[i] = list;
return;
}
}
fprintf(stderr, "ran out of space in vm_config_groups");
abort();
}
int qemu_set_option(const char *str)
{
char group[64], id[64], arg[64];
QemuOptsList *list;
QemuOpts *opts;
int rc, offset;
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;
}
if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
return -1;
}
return 0;
}
struct ConfigWriteData {
QemuOptsList *list;
FILE *fp;
};
static int config_write_opt(const char *name, const char *value, void *opaque)
{
struct ConfigWriteData *data = opaque;
fprintf(data->fp, " %s = \"%s\"\n", name, value);
return 0;
}
static int config_write_opts(QemuOpts *opts, void *opaque)
{
struct ConfigWriteData *data = opaque;
const char *id = qemu_opts_id(opts);
if (id) {
fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
} else {
fprintf(data->fp, "[%s]\n", data->list->name);
}
qemu_opt_foreach(opts, config_write_opt, data, 0);
fprintf(data->fp, "\n");
return 0;
}
void qemu_config_write(FILE *fp)
{
struct ConfigWriteData data = { .fp = fp };
QemuOptsList **lists = vm_config_groups;
int i;
fprintf(fp, "# qemu config file\n\n");
for (i = 0; lists[i] != NULL; i++) {
data.list = lists[i];
qemu_opts_foreach(data.list, config_write_opts, &data, 0);
}
}
int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
{
char line[1024], group[64], id[64], arg[64], value[1024];
Location loc;
QemuOptsList *list = NULL;
Error *local_err = NULL;
QemuOpts *opts = NULL;
int res = -1, lno = 0;
loc_push_none(&loc);
while (fgets(line, sizeof(line), fp) != NULL) {
loc_set_file(fname, ++lno);
if (line[0] == '\n') {
/* skip empty lines */
continue;
}
if (line[0] == '#') {
/* comment */
continue;
}
if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
/* group with id */
list = find_list(lists, group, &local_err);
if (error_is_set(&local_err)) {
error_report("%s", error_get_pretty(local_err));
error_free(local_err);
goto out;
}
opts = qemu_opts_create(list, id, 1, NULL);
continue;
}
if (sscanf(line, "[%63[^]]]", group) == 1) {
/* group without id */
list = find_list(lists, group, &local_err);
if (error_is_set(&local_err)) {
error_report("%s", error_get_pretty(local_err));
error_free(local_err);
goto out;
}
opts = qemu_opts_create_nofail(list);
continue;
}
if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
/* arg = value */
if (opts == NULL) {
error_report("no group defined");
goto out;
}
if (qemu_opt_set(opts, arg, value) != 0) {
goto out;
}
continue;
}
error_report("parse error");
goto out;
}
if (ferror(fp)) {
error_report("error reading file");
goto out;
}
res = 0;
out:
loc_pop(&loc);
return res;
}
int qemu_read_config_file(const char *filename)
{
FILE *f = fopen(filename, "r");
int ret;
if (f == NULL) {
return -errno;
}
ret = qemu_config_parse(f, vm_config_groups, filename);
fclose(f);
if (ret == 0) {
return 0;
} else {
return -EINVAL;
}
}
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