Change the parser to put the values into a QDict and pass them to a callback. qemu_config_parse's QemuOpts creation is itself turned into a callback function.
This is useful for -readconfig to support keyval-based options; getting a QDict from the parser removes a roundtrip from QDict to QemuOpts and then back to QDict. Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- include/qemu/config-file.h | 6 ++- softmmu/vl.c | 4 +- util/qemu-config.c | 91 +++++++++++++++++++++++++------------- 3 files changed, 68 insertions(+), 33 deletions(-) diff --git a/include/qemu/config-file.h b/include/qemu/config-file.h index 9a44d2a77b..217a909053 100644 --- a/include/qemu/config-file.h +++ b/include/qemu/config-file.h @@ -1,6 +1,7 @@ #ifndef QEMU_CONFIG_FILE_H #define QEMU_CONFIG_FILE_H +typedef void QEMUConfigCB(const char *group, QDict *qdict, void *opaque, Error **errp); QemuOptsList *qemu_find_opts(const char *group); QemuOptsList *qemu_find_opts_err(const char *group, Error **errp); @@ -13,7 +14,10 @@ int qemu_global_option(const char *str); int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp); -int qemu_read_config_file(const char *filename, Error **errp); +/* A default callback for qemu_read_config_file(). */ +void qemu_config_do_parse(const char *group, QDict *qdict, void *opaque, Error **errp); + +int qemu_read_config_file(const char *filename, QEMUConfigCB *f, Error **errp); /* Parse QDict options as a replacement for a config file (allowing multiple enumerated (0..(n-1)) configuration "sections") */ diff --git a/softmmu/vl.c b/softmmu/vl.c index c7653fe788..598d064a8e 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -2121,7 +2121,7 @@ static void qemu_read_default_config_file(Error **errp) int ret; g_autofree char *file = get_relocated_path(CONFIG_QEMU_CONFDIR "/qemu.conf"); - ret = qemu_read_config_file(file, errp); + ret = qemu_read_config_file(file, qemu_config_do_parse, errp); if (ret < 0) { if (ret == -ENOENT) { error_free(*errp); @@ -3370,7 +3370,7 @@ 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, &error_fatal); + qemu_read_config_file(optarg, qemu_config_do_parse, &error_fatal); break; case QEMU_OPTION_spice: olist = qemu_find_opts_err("spice", NULL); diff --git a/util/qemu-config.c b/util/qemu-config.c index 9bd86aab1b..22eebca3a8 100644 --- a/util/qemu-config.c +++ b/util/qemu-config.c @@ -308,19 +308,19 @@ void qemu_add_opts(QemuOptsList *list) } /* Returns number of config groups on success, -errno on error */ -int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp) +static int qemu_config_foreach(FILE *fp, QEMUConfigCB *cb, void *opaque, + const char *fname, Error **errp) { - char line[1024], group[64], id[64], arg[64], value[1024]; + char line[1024], prev_group[64], group[64], arg[64], value[1024]; Location loc; - QemuOptsList *list = NULL; Error *local_err = NULL; - QemuOpts *opts = NULL; + QDict *qdict = NULL; int res = -EINVAL, lno = 0; int count = 0; loc_push_none(&loc); while (fgets(line, sizeof(line), fp) != NULL) { - loc_set_file(fname, ++lno); + ++lno; if (line[0] == '\n') { /* skip empty lines */ continue; @@ -329,39 +329,39 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error * /* comment */ continue; } - if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) { - /* group with id */ - list = find_list(lists, group, &local_err); - if (local_err) { - error_propagate(errp, local_err); - goto out; + if (line[0] == '[') { + QDict *prev = qdict; + if (sscanf(line, "[%63s \"%63[^\"]\"]", group, value) == 2) { + qdict = qdict_new(); + qdict_put_str(qdict, "id", value); + count++; + } else if (sscanf(line, "[%63[^]]]", group) == 1) { + qdict = qdict_new(); + count++; } - opts = qemu_opts_create(list, id, 1, NULL); - count++; - continue; - } - if (sscanf(line, "[%63[^]]]", group) == 1) { - /* group without id */ - list = find_list(lists, group, &local_err); - if (local_err) { - error_propagate(errp, local_err); - goto out; + if (qdict != prev) { + if (prev) { + cb(prev_group, prev, opaque, &local_err); + qobject_unref(prev); + if (local_err) { + error_propagate(errp, local_err); + goto out; + } + } + strcpy(prev_group, group); + continue; } - opts = qemu_opts_create(list, NULL, 0, &error_abort); - count++; - continue; } + loc_set_file(fname, lno); value[0] = '\0'; if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 || sscanf(line, " %63s = \"\"", arg) == 1) { /* arg = value */ - if (opts == NULL) { + if (qdict == NULL) { error_setg(errp, "no group defined"); goto out; } - if (!qemu_opt_set(opts, arg, value, errp)) { - goto out; - } + qdict_put_str(qdict, arg, value); continue; } error_setg(errp, "parse error"); @@ -375,10 +375,41 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error * res = count; out: loc_pop(&loc); + if (qdict) { + cb(group, qdict, opaque, errp); + qobject_unref(qdict); + } return res; } -int qemu_read_config_file(const char *filename, Error **errp) +void qemu_config_do_parse(const char *group, QDict *qdict, void *opaque, Error **errp) +{ + QemuOptsList **lists = opaque; + const char *id = qdict_get_try_str(qdict, "id"); + QemuOptsList *list; + QemuOpts *opts; + + list = find_list(lists, group, errp); + if (!list) { + return; + } + + opts = qemu_opts_create(list, id, 1, errp); + if (!opts) { + return; + } + if (id) { + qdict_del(qdict, "id"); + } + qemu_opts_absorb_qdict(opts, qdict, errp); +} + +int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp) +{ + return qemu_config_foreach(fp, qemu_config_do_parse, lists, fname, errp); +} + +int qemu_read_config_file(const char *filename, QEMUConfigCB *cb, Error **errp) { FILE *f = fopen(filename, "r"); int ret; @@ -388,7 +419,7 @@ int qemu_read_config_file(const char *filename, Error **errp) return -errno; } - ret = qemu_config_parse(f, vm_config_groups, filename, errp); + ret = qemu_config_foreach(f, cb, vm_config_groups, filename, errp); fclose(f); return ret; } -- 2.26.2