diff options
Diffstat (limited to 'qemu/util/qemu-config.c')
| -rw-r--r-- | qemu/util/qemu-config.c | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/qemu/util/qemu-config.c b/qemu/util/qemu-config.c new file mode 100644 index 000000000..5fcfd0e6a --- /dev/null +++ b/qemu/util/qemu-config.c @@ -0,0 +1,565 @@ +#include "qemu-common.h" +#include "qemu/error-report.h" +#include "qemu/option.h" +#include "qemu/config-file.h" +#include "qapi/error.h" +#include "qmp-commands.h" + +static QemuOptsList *vm_config_groups[48]; +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_err(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); + } + if (desc[i].def_value_str) { + info->has_q_default = true; + info->q_default = g_strdup(desc[i].def_value_str); + } + + 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; +} + +/* restore machine options that are now machine's properties */ +static QemuOptsList machine_opts = { + .merge_lists = true, + .head = QTAILQ_HEAD_INITIALIZER(machine_opts.head), + .desc = { + { + .name = "type", + .type = QEMU_OPT_STRING, + .help = "emulated machine" + },{ + .name = "accel", + .type = QEMU_OPT_STRING, + .help = "accelerator list", + },{ + .name = "kernel_irqchip", + .type = QEMU_OPT_BOOL, + .help = "use KVM in-kernel irqchip", + },{ + .name = "kvm_shadow_mem", + .type = QEMU_OPT_SIZE, + .help = "KVM shadow MMU size", + },{ + .name = "kernel", + .type = QEMU_OPT_STRING, + .help = "Linux kernel image file", + },{ + .name = "initrd", + .type = QEMU_OPT_STRING, + .help = "Linux initial ramdisk file", + },{ + .name = "append", + .type = QEMU_OPT_STRING, + .help = "Linux kernel command line", + },{ + .name = "dtb", + .type = QEMU_OPT_STRING, + .help = "Linux kernel device tree file", + },{ + .name = "dumpdtb", + .type = QEMU_OPT_STRING, + .help = "Dump current dtb to a file and quit", + },{ + .name = "phandle_start", + .type = QEMU_OPT_NUMBER, + .help = "The first phandle ID we may generate dynamically", + },{ + .name = "dt_compatible", + .type = QEMU_OPT_STRING, + .help = "Overrides the \"compatible\" property of the dt root node", + },{ + .name = "dump-guest-core", + .type = QEMU_OPT_BOOL, + .help = "Include guest memory in a core dump", + },{ + .name = "mem-merge", + .type = QEMU_OPT_BOOL, + .help = "enable/disable memory merge support", + },{ + .name = "usb", + .type = QEMU_OPT_BOOL, + .help = "Set on/off to enable/disable usb", + },{ + .name = "firmware", + .type = QEMU_OPT_STRING, + .help = "firmware image", + },{ + .name = "iommu", + .type = QEMU_OPT_BOOL, + .help = "Set on/off to enable/disable Intel IOMMU (VT-d)", + },{ + .name = "suppress-vmdesc", + .type = QEMU_OPT_BOOL, + .help = "Set on to disable self-describing migration", + }, + { /* End of list */ } + } +}; + +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 if (!strcmp("machine", vm_config_groups[i]->name)) { + info->parameters = query_option_descs(machine_opts.desc); + } 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) +{ + Error *local_err = NULL; + 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; + } + + qemu_opt_set(opts, arg, str + offset + 1, &local_err); + if (local_err) { + error_report_err(local_err); + return -1; + } + return 0; +} + +struct ConfigWriteData { + QemuOptsList *list; + FILE *fp; +}; + +static int config_write_opt(void *opaque, const char *name, const char *value, + Error **errp) +{ + struct ConfigWriteData *data = opaque; + + fprintf(data->fp, " %s = \"%s\"\n", name, value); + return 0; +} + +static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp) +{ + 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, NULL); + 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, NULL); + } +} + +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_err(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_err(local_err); + goto out; + } + opts = qemu_opts_create(list, NULL, 0, &error_abort); + continue; + } + value[0] = '\0'; + if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 || + sscanf(line, " %63s = \"\"", arg) == 1) { + /* arg = value */ + if (opts == NULL) { + error_report("no group defined"); + goto out; + } + qemu_opt_set(opts, arg, value, &local_err); + if (local_err) { + error_report_err(local_err); + 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; + } + } +} |