| #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_setg(errp, "There is no option group '%s'", 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 (local_err) { |
| error_report("%s", error_get_pretty(local_err)); |
| error_free(local_err); |
| } |
| |
| return ret; |
| } |
| |
| QemuOpts *qemu_find_opts_singleton(const char *group) |
| { |
| QemuOptsList *list; |
| QemuOpts *opts; |
| |
| list = qemu_find_opts(group); |
| assert(list); |
| opts = qemu_opts_find(list, NULL); |
| if (!opts) { |
| opts = qemu_opts_create(list, NULL, 0, &error_abort); |
| } |
| return opts; |
| } |
| |
| 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 (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 (local_err) { |
| error_report("%s", error_get_pretty(local_err)); |
| error_free(local_err); |
| goto out; |
| } |
| opts = qemu_opts_create(list, NULL, 0, &error_abort); |
| 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; |
| } |
| } |
| |
| static void config_parse_qdict_section(QDict *options, QemuOptsList *opts, |
| Error **errp) |
| { |
| QemuOpts *subopts; |
| QDict *subqdict; |
| QList *list = NULL; |
| Error *local_err = NULL; |
| size_t orig_size, enum_size; |
| char *prefix; |
| |
| prefix = g_strdup_printf("%s.", opts->name); |
| qdict_extract_subqdict(options, &subqdict, prefix); |
| g_free(prefix); |
| orig_size = qdict_size(subqdict); |
| if (!orig_size) { |
| goto out; |
| } |
| |
| subopts = qemu_opts_create(opts, NULL, 0, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| goto out; |
| } |
| |
| qemu_opts_absorb_qdict(subopts, subqdict, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| goto out; |
| } |
| |
| enum_size = qdict_size(subqdict); |
| if (enum_size < orig_size && enum_size) { |
| error_setg(errp, "Unknown option '%s' for [%s]", |
| qdict_first(subqdict)->key, opts->name); |
| goto out; |
| } |
| |
| if (enum_size) { |
| /* Multiple, enumerated sections */ |
| QListEntry *list_entry; |
| unsigned i = 0; |
| |
| /* Not required anymore */ |
| qemu_opts_del(subopts); |
| |
| qdict_array_split(subqdict, &list); |
| if (qdict_size(subqdict)) { |
| error_setg(errp, "Unused option '%s' for [%s]", |
| qdict_first(subqdict)->key, opts->name); |
| goto out; |
| } |
| |
| QLIST_FOREACH_ENTRY(list, list_entry) { |
| QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry)); |
| char *opt_name; |
| |
| if (!section) { |
| error_setg(errp, "[%s] section (index %u) does not consist of " |
| "keys", opts->name, i); |
| goto out; |
| } |
| |
| opt_name = g_strdup_printf("%s.%u", opts->name, i++); |
| subopts = qemu_opts_create(opts, opt_name, 1, &local_err); |
| g_free(opt_name); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| goto out; |
| } |
| |
| qemu_opts_absorb_qdict(subopts, section, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| qemu_opts_del(subopts); |
| goto out; |
| } |
| |
| if (qdict_size(section)) { |
| error_setg(errp, "[%s] section doesn't support the option '%s'", |
| opts->name, qdict_first(section)->key); |
| qemu_opts_del(subopts); |
| goto out; |
| } |
| } |
| } |
| |
| out: |
| QDECREF(subqdict); |
| QDECREF(list); |
| } |
| |
| void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists, |
| Error **errp) |
| { |
| int i; |
| Error *local_err = NULL; |
| |
| for (i = 0; lists[i]; i++) { |
| config_parse_qdict_section(options, lists[i], &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| } |
| } |