| /* |
| * Commandline option parsing functions |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| |
| #include "qapi/error.h" |
| #include "qemu-common.h" |
| #include "qemu/error-report.h" |
| #include "qapi/qmp/types.h" |
| #include "qapi/qmp/qerror.h" |
| #include "qemu/option_int.h" |
| #include "qemu/cutils.h" |
| #include "qemu/id.h" |
| #include "qemu/help_option.h" |
| |
| /* |
| * Extracts the name of an option from the parameter string (p points at the |
| * first byte of the option name) |
| * |
| * The option name is delimited by delim (usually , or =) or the string end |
| * and is copied into buf. If the option name is longer than buf_size, it is |
| * truncated. buf is always zero terminated. |
| * |
| * The return value is the position of the delimiter/zero byte after the option |
| * name in p. |
| */ |
| const char *get_opt_name(char *buf, int buf_size, const char *p, char delim) |
| { |
| char *q; |
| |
| q = buf; |
| while (*p != '\0' && *p != delim) { |
| if (q && (q - buf) < buf_size - 1) |
| *q++ = *p; |
| p++; |
| } |
| if (q) |
| *q = '\0'; |
| |
| return p; |
| } |
| |
| /* |
| * Extracts the value of an option from the parameter string p (p points at the |
| * first byte of the option value) |
| * |
| * This function is comparable to get_opt_name with the difference that the |
| * delimiter is fixed to be comma which starts a new option. To specify an |
| * option value that contains commas, double each comma. |
| */ |
| const char *get_opt_value(char *buf, int buf_size, const char *p) |
| { |
| char *q; |
| |
| q = buf; |
| while (*p != '\0') { |
| if (*p == ',') { |
| if (*(p + 1) != ',') |
| break; |
| p++; |
| } |
| if (q && (q - buf) < buf_size - 1) |
| *q++ = *p; |
| p++; |
| } |
| if (q) |
| *q = '\0'; |
| |
| return p; |
| } |
| |
| int get_next_param_value(char *buf, int buf_size, |
| const char *tag, const char **pstr) |
| { |
| const char *p; |
| char option[128]; |
| |
| p = *pstr; |
| for(;;) { |
| p = get_opt_name(option, sizeof(option), p, '='); |
| if (*p != '=') |
| break; |
| p++; |
| if (!strcmp(tag, option)) { |
| *pstr = get_opt_value(buf, buf_size, p); |
| if (**pstr == ',') { |
| (*pstr)++; |
| } |
| return strlen(buf); |
| } else { |
| p = get_opt_value(NULL, 0, p); |
| } |
| if (*p != ',') |
| break; |
| p++; |
| } |
| return 0; |
| } |
| |
| int get_param_value(char *buf, int buf_size, |
| const char *tag, const char *str) |
| { |
| return get_next_param_value(buf, buf_size, tag, &str); |
| } |
| |
| static void parse_option_bool(const char *name, const char *value, bool *ret, |
| Error **errp) |
| { |
| if (value != NULL) { |
| if (!strcmp(value, "on")) { |
| *ret = 1; |
| } else if (!strcmp(value, "off")) { |
| *ret = 0; |
| } else { |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
| name, "'on' or 'off'"); |
| } |
| } else { |
| *ret = 1; |
| } |
| } |
| |
| static void parse_option_number(const char *name, const char *value, |
| uint64_t *ret, Error **errp) |
| { |
| char *postfix; |
| uint64_t number; |
| |
| if (value != NULL) { |
| number = strtoull(value, &postfix, 0); |
| if (*postfix != '\0') { |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); |
| return; |
| } |
| *ret = number; |
| } else { |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number"); |
| } |
| } |
| |
| static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc, |
| const char *name) |
| { |
| int i; |
| |
| for (i = 0; desc[i].name != NULL; i++) { |
| if (strcmp(desc[i].name, name) == 0) { |
| return &desc[i]; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| void parse_option_size(const char *name, const char *value, |
| uint64_t *ret, Error **errp) |
| { |
| char *postfix; |
| double sizef; |
| |
| if (value != NULL) { |
| sizef = strtod(value, &postfix); |
| if (sizef < 0 || sizef > UINT64_MAX) { |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, |
| "a non-negative number below 2^64"); |
| return; |
| } |
| switch (*postfix) { |
| case 'T': |
| sizef *= 1024; |
| /* fall through */ |
| case 'G': |
| sizef *= 1024; |
| /* fall through */ |
| case 'M': |
| sizef *= 1024; |
| /* fall through */ |
| case 'K': |
| case 'k': |
| sizef *= 1024; |
| /* fall through */ |
| case 'b': |
| case '\0': |
| *ret = (uint64_t) sizef; |
| break; |
| default: |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); |
| error_append_hint(errp, "You may use k, M, G or T suffixes for " |
| "kilobytes, megabytes, gigabytes and terabytes.\n"); |
| return; |
| } |
| } else { |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size"); |
| } |
| } |
| |
| bool has_help_option(const char *param) |
| { |
| size_t buflen = strlen(param) + 1; |
| char *buf = g_malloc(buflen); |
| const char *p = param; |
| bool result = false; |
| |
| while (*p) { |
| p = get_opt_value(buf, buflen, p); |
| if (*p) { |
| p++; |
| } |
| |
| if (is_help_option(buf)) { |
| result = true; |
| goto out; |
| } |
| } |
| |
| out: |
| g_free(buf); |
| return result; |
| } |
| |
| bool is_valid_option_list(const char *param) |
| { |
| size_t buflen = strlen(param) + 1; |
| char *buf = g_malloc(buflen); |
| const char *p = param; |
| bool result = true; |
| |
| while (*p) { |
| p = get_opt_value(buf, buflen, p); |
| if (*p && !*++p) { |
| result = false; |
| goto out; |
| } |
| |
| if (!*buf || *buf == ',') { |
| result = false; |
| goto out; |
| } |
| } |
| |
| out: |
| g_free(buf); |
| return result; |
| } |
| |
| void qemu_opts_print_help(QemuOptsList *list) |
| { |
| QemuOptDesc *desc; |
| |
| assert(list); |
| desc = list->desc; |
| printf("Supported options:\n"); |
| while (desc && desc->name) { |
| printf("%-16s %s\n", desc->name, |
| desc->help ? desc->help : "No description available"); |
| desc++; |
| } |
| } |
| /* ------------------------------------------------------------------ */ |
| |
| QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt; |
| |
| QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { |
| if (strcmp(opt->name, name) != 0) |
| continue; |
| return opt; |
| } |
| return NULL; |
| } |
| |
| static void qemu_opt_del(QemuOpt *opt) |
| { |
| QTAILQ_REMOVE(&opt->opts->head, opt, next); |
| g_free(opt->name); |
| g_free(opt->str); |
| g_free(opt); |
| } |
| |
| /* qemu_opt_set allows many settings for the same option. |
| * This function deletes all settings for an option. |
| */ |
| static void qemu_opt_del_all(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt, *next_opt; |
| |
| QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) { |
| if (!strcmp(opt->name, name)) { |
| qemu_opt_del(opt); |
| } |
| } |
| } |
| |
| const char *qemu_opt_get(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt; |
| |
| if (opts == NULL) { |
| return NULL; |
| } |
| |
| opt = qemu_opt_find(opts, name); |
| if (!opt) { |
| const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); |
| if (desc && desc->def_value_str) { |
| return desc->def_value_str; |
| } |
| } |
| return opt ? opt->str : NULL; |
| } |
| |
| /* Get a known option (or its default) and remove it from the list |
| * all in one action. Return a malloced string of the option value. |
| * Result must be freed by caller with g_free(). |
| */ |
| char *qemu_opt_get_del(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt; |
| const QemuOptDesc *desc; |
| char *str = NULL; |
| |
| if (opts == NULL) { |
| return NULL; |
| } |
| |
| opt = qemu_opt_find(opts, name); |
| if (!opt) { |
| desc = find_desc_by_name(opts->list->desc, name); |
| if (desc && desc->def_value_str) { |
| str = g_strdup(desc->def_value_str); |
| } |
| return str; |
| } |
| str = opt->str; |
| opt->str = NULL; |
| qemu_opt_del_all(opts, name); |
| return str; |
| } |
| |
| bool qemu_opt_has_help_opt(QemuOpts *opts) |
| { |
| QemuOpt *opt; |
| |
| QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { |
| if (is_help_option(opt->name)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name, |
| bool defval, bool del) |
| { |
| QemuOpt *opt; |
| bool ret = defval; |
| |
| if (opts == NULL) { |
| return ret; |
| } |
| |
| opt = qemu_opt_find(opts, name); |
| if (opt == NULL) { |
| const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); |
| if (desc && desc->def_value_str) { |
| parse_option_bool(name, desc->def_value_str, &ret, &error_abort); |
| } |
| return ret; |
| } |
| assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL); |
| ret = opt->value.boolean; |
| if (del) { |
| qemu_opt_del_all(opts, name); |
| } |
| return ret; |
| } |
| |
| bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval) |
| { |
| return qemu_opt_get_bool_helper(opts, name, defval, false); |
| } |
| |
| bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval) |
| { |
| return qemu_opt_get_bool_helper(opts, name, defval, true); |
| } |
| |
| static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name, |
| uint64_t defval, bool del) |
| { |
| QemuOpt *opt; |
| uint64_t ret = defval; |
| |
| if (opts == NULL) { |
| return ret; |
| } |
| |
| opt = qemu_opt_find(opts, name); |
| if (opt == NULL) { |
| const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); |
| if (desc && desc->def_value_str) { |
| parse_option_number(name, desc->def_value_str, &ret, &error_abort); |
| } |
| return ret; |
| } |
| assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER); |
| ret = opt->value.uint; |
| if (del) { |
| qemu_opt_del_all(opts, name); |
| } |
| return ret; |
| } |
| |
| uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) |
| { |
| return qemu_opt_get_number_helper(opts, name, defval, false); |
| } |
| |
| uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name, |
| uint64_t defval) |
| { |
| return qemu_opt_get_number_helper(opts, name, defval, true); |
| } |
| |
| static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name, |
| uint64_t defval, bool del) |
| { |
| QemuOpt *opt; |
| uint64_t ret = defval; |
| |
| if (opts == NULL) { |
| return ret; |
| } |
| |
| opt = qemu_opt_find(opts, name); |
| if (opt == NULL) { |
| const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name); |
| if (desc && desc->def_value_str) { |
| parse_option_size(name, desc->def_value_str, &ret, &error_abort); |
| } |
| return ret; |
| } |
| assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE); |
| ret = opt->value.uint; |
| if (del) { |
| qemu_opt_del_all(opts, name); |
| } |
| return ret; |
| } |
| |
| uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) |
| { |
| return qemu_opt_get_size_helper(opts, name, defval, false); |
| } |
| |
| uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name, |
| uint64_t defval) |
| { |
| return qemu_opt_get_size_helper(opts, name, defval, true); |
| } |
| |
| static void qemu_opt_parse(QemuOpt *opt, Error **errp) |
| { |
| if (opt->desc == NULL) |
| return; |
| |
| switch (opt->desc->type) { |
| case QEMU_OPT_STRING: |
| /* nothing */ |
| return; |
| case QEMU_OPT_BOOL: |
| parse_option_bool(opt->name, opt->str, &opt->value.boolean, errp); |
| break; |
| case QEMU_OPT_NUMBER: |
| parse_option_number(opt->name, opt->str, &opt->value.uint, errp); |
| break; |
| case QEMU_OPT_SIZE: |
| parse_option_size(opt->name, opt->str, &opt->value.uint, errp); |
| break; |
| default: |
| abort(); |
| } |
| } |
| |
| static bool opts_accepts_any(const QemuOpts *opts) |
| { |
| return opts->list->desc[0].name == NULL; |
| } |
| |
| int qemu_opt_unset(QemuOpts *opts, const char *name) |
| { |
| QemuOpt *opt = qemu_opt_find(opts, name); |
| |
| assert(opts_accepts_any(opts)); |
| |
| if (opt == NULL) { |
| return -1; |
| } else { |
| qemu_opt_del(opt); |
| return 0; |
| } |
| } |
| |
| static void opt_set(QemuOpts *opts, const char *name, const char *value, |
| bool prepend, Error **errp) |
| { |
| QemuOpt *opt; |
| const QemuOptDesc *desc; |
| Error *local_err = NULL; |
| |
| desc = find_desc_by_name(opts->list->desc, name); |
| if (!desc && !opts_accepts_any(opts)) { |
| error_setg(errp, QERR_INVALID_PARAMETER, name); |
| return; |
| } |
| |
| opt = g_malloc0(sizeof(*opt)); |
| opt->name = g_strdup(name); |
| opt->opts = opts; |
| if (prepend) { |
| QTAILQ_INSERT_HEAD(&opts->head, opt, next); |
| } else { |
| QTAILQ_INSERT_TAIL(&opts->head, opt, next); |
| } |
| opt->desc = desc; |
| opt->str = g_strdup(value); |
| qemu_opt_parse(opt, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| qemu_opt_del(opt); |
| } |
| } |
| |
| void qemu_opt_set(QemuOpts *opts, const char *name, const char *value, |
| Error **errp) |
| { |
| opt_set(opts, name, value, false, errp); |
| } |
| |
| void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val, |
| Error **errp) |
| { |
| QemuOpt *opt; |
| const QemuOptDesc *desc = opts->list->desc; |
| |
| opt = g_malloc0(sizeof(*opt)); |
| opt->desc = find_desc_by_name(desc, name); |
| if (!opt->desc && !opts_accepts_any(opts)) { |
| error_setg(errp, QERR_INVALID_PARAMETER, name); |
| g_free(opt); |
| return; |
| } |
| |
| opt->name = g_strdup(name); |
| opt->opts = opts; |
| opt->value.boolean = !!val; |
| opt->str = g_strdup(val ? "on" : "off"); |
| QTAILQ_INSERT_TAIL(&opts->head, opt, next); |
| } |
| |
| void qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val, |
| Error **errp) |
| { |
| QemuOpt *opt; |
| const QemuOptDesc *desc = opts->list->desc; |
| |
| opt = g_malloc0(sizeof(*opt)); |
| opt->desc = find_desc_by_name(desc, name); |
| if (!opt->desc && !opts_accepts_any(opts)) { |
| error_setg(errp, QERR_INVALID_PARAMETER, name); |
| g_free(opt); |
| return; |
| } |
| |
| opt->name = g_strdup(name); |
| opt->opts = opts; |
| opt->value.uint = val; |
| opt->str = g_strdup_printf("%" PRId64, val); |
| QTAILQ_INSERT_TAIL(&opts->head, opt, next); |
| } |
| |
| /** |
| * For each member of @opts, call @func(@opaque, name, value, @errp). |
| * @func() may store an Error through @errp, but must return non-zero then. |
| * When @func() returns non-zero, break the loop and return that value. |
| * Return zero when the loop completes. |
| */ |
| int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque, |
| Error **errp) |
| { |
| QemuOpt *opt; |
| int rc; |
| |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| rc = func(opaque, opt->name, opt->str, errp); |
| if (rc) { |
| return rc; |
| } |
| assert(!errp || !*errp); |
| } |
| return 0; |
| } |
| |
| QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id) |
| { |
| QemuOpts *opts; |
| |
| QTAILQ_FOREACH(opts, &list->head, next) { |
| if (!opts->id && !id) { |
| return opts; |
| } |
| if (opts->id && id && !strcmp(opts->id, id)) { |
| return opts; |
| } |
| } |
| return NULL; |
| } |
| |
| QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, |
| int fail_if_exists, Error **errp) |
| { |
| QemuOpts *opts = NULL; |
| |
| if (id) { |
| if (!id_wellformed(id)) { |
| error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id", |
| "an identifier"); |
| error_append_hint(errp, "Identifiers consist of letters, digits, " |
| "'-', '.', '_', starting with a letter.\n"); |
| return NULL; |
| } |
| opts = qemu_opts_find(list, id); |
| if (opts != NULL) { |
| if (fail_if_exists && !list->merge_lists) { |
| error_setg(errp, "Duplicate ID '%s' for %s", id, list->name); |
| return NULL; |
| } else { |
| return opts; |
| } |
| } |
| } else if (list->merge_lists) { |
| opts = qemu_opts_find(list, NULL); |
| if (opts) { |
| return opts; |
| } |
| } |
| opts = g_malloc0(sizeof(*opts)); |
| opts->id = g_strdup(id); |
| opts->list = list; |
| loc_save(&opts->loc); |
| QTAILQ_INIT(&opts->head); |
| QTAILQ_INSERT_TAIL(&list->head, opts, next); |
| return opts; |
| } |
| |
| void qemu_opts_reset(QemuOptsList *list) |
| { |
| QemuOpts *opts, *next_opts; |
| |
| QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) { |
| qemu_opts_del(opts); |
| } |
| } |
| |
| void qemu_opts_loc_restore(QemuOpts *opts) |
| { |
| loc_restore(&opts->loc); |
| } |
| |
| void qemu_opts_set(QemuOptsList *list, const char *id, |
| const char *name, const char *value, Error **errp) |
| { |
| QemuOpts *opts; |
| Error *local_err = NULL; |
| |
| opts = qemu_opts_create(list, id, 1, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| qemu_opt_set(opts, name, value, errp); |
| } |
| |
| const char *qemu_opts_id(QemuOpts *opts) |
| { |
| return opts->id; |
| } |
| |
| /* The id string will be g_free()d by qemu_opts_del */ |
| void qemu_opts_set_id(QemuOpts *opts, char *id) |
| { |
| opts->id = id; |
| } |
| |
| void qemu_opts_del(QemuOpts *opts) |
| { |
| QemuOpt *opt; |
| |
| if (opts == NULL) { |
| return; |
| } |
| |
| for (;;) { |
| opt = QTAILQ_FIRST(&opts->head); |
| if (opt == NULL) |
| break; |
| qemu_opt_del(opt); |
| } |
| QTAILQ_REMOVE(&opts->list->head, opts, next); |
| g_free(opts->id); |
| g_free(opts); |
| } |
| |
| /* print value, escaping any commas in value */ |
| static void escaped_print(const char *value) |
| { |
| const char *ptr; |
| |
| for (ptr = value; *ptr; ++ptr) { |
| if (*ptr == ',') { |
| putchar(','); |
| } |
| putchar(*ptr); |
| } |
| } |
| |
| void qemu_opts_print(QemuOpts *opts, const char *separator) |
| { |
| QemuOpt *opt; |
| QemuOptDesc *desc = opts->list->desc; |
| const char *sep = ""; |
| |
| if (opts->id) { |
| printf("id=%s", opts->id); /* passed id_wellformed -> no commas */ |
| sep = separator; |
| } |
| |
| if (desc[0].name == NULL) { |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| printf("%s%s=", sep, opt->name); |
| escaped_print(opt->str); |
| sep = separator; |
| } |
| return; |
| } |
| for (; desc && desc->name; desc++) { |
| const char *value; |
| QemuOpt *opt = qemu_opt_find(opts, desc->name); |
| |
| value = opt ? opt->str : desc->def_value_str; |
| if (!value) { |
| continue; |
| } |
| if (desc->type == QEMU_OPT_STRING) { |
| printf("%s%s=", sep, desc->name); |
| escaped_print(value); |
| } else if ((desc->type == QEMU_OPT_SIZE || |
| desc->type == QEMU_OPT_NUMBER) && opt) { |
| printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint); |
| } else { |
| printf("%s%s=%s", sep, desc->name, value); |
| } |
| sep = separator; |
| } |
| } |
| |
| static void opts_do_parse(QemuOpts *opts, const char *params, |
| const char *firstname, bool prepend, Error **errp) |
| { |
| char option[128], value[1024]; |
| const char *p,*pe,*pc; |
| Error *local_err = NULL; |
| |
| for (p = params; *p != '\0'; p++) { |
| pe = strchr(p, '='); |
| pc = strchr(p, ','); |
| if (!pe || (pc && pc < pe)) { |
| /* found "foo,more" */ |
| if (p == params && firstname) { |
| /* implicitly named first option */ |
| pstrcpy(option, sizeof(option), firstname); |
| p = get_opt_value(value, sizeof(value), p); |
| } else { |
| /* option without value, probably a flag */ |
| p = get_opt_name(option, sizeof(option), p, ','); |
| if (strncmp(option, "no", 2) == 0) { |
| memmove(option, option+2, strlen(option+2)+1); |
| pstrcpy(value, sizeof(value), "off"); |
| } else { |
| pstrcpy(value, sizeof(value), "on"); |
| } |
| } |
| } else { |
| /* found "foo=bar,more" */ |
| p = get_opt_name(option, sizeof(option), p, '='); |
| if (*p != '=') { |
| break; |
| } |
| p++; |
| p = get_opt_value(value, sizeof(value), p); |
| } |
| if (strcmp(option, "id") != 0) { |
| /* store and parse */ |
| opt_set(opts, option, value, prepend, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| } |
| if (*p != ',') { |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Store options parsed from @params into @opts. |
| * If @firstname is non-null, the first key=value in @params may omit |
| * key=, and is treated as if key was @firstname. |
| * On error, store an error object through @errp if non-null. |
| */ |
| void qemu_opts_do_parse(QemuOpts *opts, const char *params, |
| const char *firstname, Error **errp) |
| { |
| opts_do_parse(opts, params, firstname, false, errp); |
| } |
| |
| static QemuOpts *opts_parse(QemuOptsList *list, const char *params, |
| bool permit_abbrev, bool defaults, Error **errp) |
| { |
| const char *firstname; |
| char value[1024], *id = NULL; |
| const char *p; |
| QemuOpts *opts; |
| Error *local_err = NULL; |
| |
| assert(!permit_abbrev || list->implied_opt_name); |
| firstname = permit_abbrev ? list->implied_opt_name : NULL; |
| |
| if (strncmp(params, "id=", 3) == 0) { |
| get_opt_value(value, sizeof(value), params+3); |
| id = value; |
| } else if ((p = strstr(params, ",id=")) != NULL) { |
| get_opt_value(value, sizeof(value), p+4); |
| id = value; |
| } |
| |
| /* |
| * This code doesn't work for defaults && !list->merge_lists: when |
| * params has no id=, and list has an element with !opts->id, it |
| * appends a new element instead of returning the existing opts. |
| * However, we got no use for this case. Guard against possible |
| * (if unlikely) future misuse: |
| */ |
| assert(!defaults || list->merge_lists); |
| opts = qemu_opts_create(list, id, !defaults, &local_err); |
| if (opts == NULL) { |
| error_propagate(errp, local_err); |
| return NULL; |
| } |
| |
| opts_do_parse(opts, params, firstname, defaults, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| qemu_opts_del(opts); |
| return NULL; |
| } |
| |
| return opts; |
| } |
| |
| /** |
| * Create a QemuOpts in @list and with options parsed from @params. |
| * If @permit_abbrev, the first key=value in @params may omit key=, |
| * and is treated as if key was @list->implied_opt_name. |
| * On error, store an error object through @errp if non-null. |
| * Return the new QemuOpts on success, null pointer on error. |
| */ |
| QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, |
| bool permit_abbrev, Error **errp) |
| { |
| return opts_parse(list, params, permit_abbrev, false, errp); |
| } |
| |
| /** |
| * Create a QemuOpts in @list and with options parsed from @params. |
| * If @permit_abbrev, the first key=value in @params may omit key=, |
| * and is treated as if key was @list->implied_opt_name. |
| * Report errors with error_report_err(). This is inappropriate in |
| * QMP context. Do not use this function there! |
| * Return the new QemuOpts on success, null pointer on error. |
| */ |
| QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params, |
| bool permit_abbrev) |
| { |
| Error *err = NULL; |
| QemuOpts *opts; |
| |
| opts = opts_parse(list, params, permit_abbrev, false, &err); |
| if (err) { |
| error_report_err(err); |
| } |
| return opts; |
| } |
| |
| void qemu_opts_set_defaults(QemuOptsList *list, const char *params, |
| int permit_abbrev) |
| { |
| QemuOpts *opts; |
| |
| opts = opts_parse(list, params, permit_abbrev, true, NULL); |
| assert(opts); |
| } |
| |
| typedef struct OptsFromQDictState { |
| QemuOpts *opts; |
| Error **errp; |
| } OptsFromQDictState; |
| |
| static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque) |
| { |
| OptsFromQDictState *state = opaque; |
| char buf[32]; |
| const char *value; |
| int n; |
| |
| if (!strcmp(key, "id") || *state->errp) { |
| return; |
| } |
| |
| switch (qobject_type(obj)) { |
| case QTYPE_QSTRING: |
| value = qstring_get_str(qobject_to_qstring(obj)); |
| break; |
| case QTYPE_QINT: |
| n = snprintf(buf, sizeof(buf), "%" PRId64, |
| qint_get_int(qobject_to_qint(obj))); |
| assert(n < sizeof(buf)); |
| value = buf; |
| break; |
| case QTYPE_QFLOAT: |
| n = snprintf(buf, sizeof(buf), "%.17g", |
| qfloat_get_double(qobject_to_qfloat(obj))); |
| assert(n < sizeof(buf)); |
| value = buf; |
| break; |
| case QTYPE_QBOOL: |
| pstrcpy(buf, sizeof(buf), |
| qbool_get_bool(qobject_to_qbool(obj)) ? "on" : "off"); |
| value = buf; |
| break; |
| default: |
| return; |
| } |
| |
| qemu_opt_set(state->opts, key, value, state->errp); |
| } |
| |
| /* |
| * Create QemuOpts from a QDict. |
| * Use value of key "id" as ID if it exists and is a QString. |
| * Only QStrings, QInts, QFloats and QBools are copied. Entries with |
| * other types are silently ignored. |
| */ |
| QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict, |
| Error **errp) |
| { |
| OptsFromQDictState state; |
| Error *local_err = NULL; |
| QemuOpts *opts; |
| |
| opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1, |
| &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return NULL; |
| } |
| |
| assert(opts != NULL); |
| |
| state.errp = &local_err; |
| state.opts = opts; |
| qdict_iter(qdict, qemu_opts_from_qdict_1, &state); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| qemu_opts_del(opts); |
| return NULL; |
| } |
| |
| return opts; |
| } |
| |
| /* |
| * Adds all QDict entries to the QemuOpts that can be added and removes them |
| * from the QDict. When this function returns, the QDict contains only those |
| * entries that couldn't be added to the QemuOpts. |
| */ |
| void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp) |
| { |
| const QDictEntry *entry, *next; |
| |
| entry = qdict_first(qdict); |
| |
| while (entry != NULL) { |
| Error *local_err = NULL; |
| OptsFromQDictState state = { |
| .errp = &local_err, |
| .opts = opts, |
| }; |
| |
| next = qdict_next(qdict, entry); |
| |
| if (find_desc_by_name(opts->list->desc, entry->key)) { |
| qemu_opts_from_qdict_1(entry->key, entry->value, &state); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } else { |
| qdict_del(qdict, entry->key); |
| } |
| } |
| |
| entry = next; |
| } |
| } |
| |
| /* |
| * Convert from QemuOpts to QDict. |
| * The QDict values are of type QString. |
| * TODO We'll want to use types appropriate for opt->desc->type, but |
| * this is enough for now. |
| */ |
| QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict) |
| { |
| QemuOpt *opt; |
| QObject *val; |
| |
| if (!qdict) { |
| qdict = qdict_new(); |
| } |
| if (opts->id) { |
| qdict_put(qdict, "id", qstring_from_str(opts->id)); |
| } |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| val = QOBJECT(qstring_from_str(opt->str)); |
| qdict_put_obj(qdict, opt->name, val); |
| } |
| return qdict; |
| } |
| |
| /* Validate parsed opts against descriptions where no |
| * descriptions were provided in the QemuOptsList. |
| */ |
| void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp) |
| { |
| QemuOpt *opt; |
| Error *local_err = NULL; |
| |
| assert(opts_accepts_any(opts)); |
| |
| QTAILQ_FOREACH(opt, &opts->head, next) { |
| opt->desc = find_desc_by_name(desc, opt->name); |
| if (!opt->desc) { |
| error_setg(errp, QERR_INVALID_PARAMETER, opt->name); |
| return; |
| } |
| |
| qemu_opt_parse(opt, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| } |
| } |
| |
| /** |
| * For each member of @list, call @func(@opaque, member, @errp). |
| * Call it with the current location temporarily set to the member's. |
| * @func() may store an Error through @errp, but must return non-zero then. |
| * When @func() returns non-zero, break the loop and return that value. |
| * Return zero when the loop completes. |
| */ |
| int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, |
| void *opaque, Error **errp) |
| { |
| Location loc; |
| QemuOpts *opts; |
| int rc = 0; |
| |
| loc_push_none(&loc); |
| QTAILQ_FOREACH(opts, &list->head, next) { |
| loc_restore(&opts->loc); |
| rc = func(opaque, opts, errp); |
| if (rc) { |
| break; |
| } |
| assert(!errp || !*errp); |
| } |
| loc_pop(&loc); |
| return rc; |
| } |
| |
| static size_t count_opts_list(QemuOptsList *list) |
| { |
| QemuOptDesc *desc = NULL; |
| size_t num_opts = 0; |
| |
| if (!list) { |
| return 0; |
| } |
| |
| desc = list->desc; |
| while (desc && desc->name) { |
| num_opts++; |
| desc++; |
| } |
| |
| return num_opts; |
| } |
| |
| void qemu_opts_free(QemuOptsList *list) |
| { |
| g_free(list); |
| } |
| |
| /* Realloc dst option list and append options from an option list (list) |
| * to it. dst could be NULL or a malloced list. |
| * The lifetime of dst must be shorter than the input list because the |
| * QemuOptDesc->name, ->help, and ->def_value_str strings are shared. |
| */ |
| QemuOptsList *qemu_opts_append(QemuOptsList *dst, |
| QemuOptsList *list) |
| { |
| size_t num_opts, num_dst_opts; |
| QemuOptDesc *desc; |
| bool need_init = false; |
| bool need_head_update; |
| |
| if (!list) { |
| return dst; |
| } |
| |
| /* If dst is NULL, after realloc, some area of dst should be initialized |
| * before adding options to it. |
| */ |
| if (!dst) { |
| need_init = true; |
| need_head_update = true; |
| } else { |
| /* Moreover, even if dst is not NULL, the realloc may move it to a |
| * different address in which case we may get a stale tail pointer |
| * in dst->head. */ |
| need_head_update = QTAILQ_EMPTY(&dst->head); |
| } |
| |
| num_opts = count_opts_list(dst); |
| num_dst_opts = num_opts; |
| num_opts += count_opts_list(list); |
| dst = g_realloc(dst, sizeof(QemuOptsList) + |
| (num_opts + 1) * sizeof(QemuOptDesc)); |
| if (need_init) { |
| dst->name = NULL; |
| dst->implied_opt_name = NULL; |
| dst->merge_lists = false; |
| } |
| if (need_head_update) { |
| QTAILQ_INIT(&dst->head); |
| } |
| dst->desc[num_dst_opts].name = NULL; |
| |
| /* append list->desc to dst->desc */ |
| if (list) { |
| desc = list->desc; |
| while (desc && desc->name) { |
| if (find_desc_by_name(dst->desc, desc->name) == NULL) { |
| dst->desc[num_dst_opts++] = *desc; |
| dst->desc[num_dst_opts].name = NULL; |
| } |
| desc++; |
| } |
| } |
| |
| return dst; |
| } |
