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qemu-e2k/util/qemu-option.c
Chunyan Liu 98d896d978 QemuOpts: cleanup tmp 'allocated' member from QemuOptsList 
Now only qemu_opts_append uses 'allocated' to indicate free memory.
For this function only, we can also let result list's (const char *)
members point to input list's members, only if the input list has
longer lifetime than result list. In current code, that is true.
So, we can remove the 'allocated' member from QemuOptsList definition
to keep code clean.

Signed-off-by: Chunyan Liu <cyliu@suse.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-06-16 17:23:21 +08:00

1133 lines
29 KiB
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/*
* 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 <stdio.h>
#include <string.h>
#include "qemu-common.h"
#include "qemu/error-report.h"
#include "qapi/qmp/types.h"
#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "qemu/option_int.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_set(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_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
return;
}
*ret = number;
} else {
error_set(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);
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_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
#if 0 /* conversion from qerror_report() to error_set() broke this: */
error_printf_unless_qmp("You may use k, M, G or T suffixes for "
"kilobytes, megabytes, gigabytes and terabytes.\n");
#endif
return;
}
} else {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
}
}
bool has_help_option(const char *param)
{
size_t buflen = strlen(param) + 1;
char *buf = g_malloc0(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:
free(buf);
return result;
}
bool is_valid_option_list(const char *param)
{
size_t buflen = strlen(param) + 1;
char *buf = g_malloc0(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:
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 = 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 = qemu_opt_find(opts, name);
bool ret = defval;
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 = qemu_opt_find(opts, name);
uint64_t ret = defval;
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 = qemu_opt_find(opts, name);
uint64_t ret = defval;
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_set(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);
}
}
int qemu_opt_set(QemuOpts *opts, const char *name, const char *value)
{
Error *local_err = NULL;
opt_set(opts, name, value, false, &local_err);
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
return -1;
}
return 0;
}
void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value,
Error **errp)
{
opt_set(opts, name, value, false, errp);
}
int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val)
{
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)) {
qerror_report(QERR_INVALID_PARAMETER, name);
g_free(opt);
return -1;
}
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);
return 0;
}
int qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val)
{
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)) {
qerror_report(QERR_INVALID_PARAMETER, name);
g_free(opt);
return -1;
}
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);
return 0;
}
int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
int abort_on_failure)
{
QemuOpt *opt;
int rc = 0;
QTAILQ_FOREACH(opt, &opts->head, next) {
rc = func(opt->name, opt->str, opaque);
if (abort_on_failure && rc != 0)
break;
}
return rc;
}
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;
}
static int id_wellformed(const char *id)
{
int i;
if (!qemu_isalpha(id[0])) {
return 0;
}
for (i = 1; id[i]; i++) {
if (!qemu_isalnum(id[i]) && !strchr("-._", id[i])) {
return 0;
}
}
return 1;
}
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_set(errp,QERR_INVALID_PARAMETER_VALUE, "id", "an identifier");
#if 0 /* conversion from qerror_report() to error_set() broke this: */
error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n");
#endif
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);
}
int qemu_opts_set(QemuOptsList *list, const char *id,
const char *name, const char *value)
{
QemuOpts *opts;
Error *local_err = NULL;
opts = qemu_opts_create(list, id, 1, &local_err);
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
return -1;
}
return qemu_opt_set(opts, name, value);
}
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);
}
void qemu_opts_print(QemuOpts *opts)
{
QemuOpt *opt;
QemuOptDesc *desc = opts->list->desc;
if (desc[0].name == NULL) {
QTAILQ_FOREACH(opt, &opts->head, next) {
printf("%s=\"%s\" ", opt->name, opt->str);
}
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' ", desc->name, value);
} else if ((desc->type == QEMU_OPT_SIZE ||
desc->type == QEMU_OPT_NUMBER) && opt) {
printf("%s=%" PRId64 " ", desc->name, opt->value.uint);
} else {
printf("%s=%s ", desc->name, value);
}
}
}
static int opts_do_parse(QemuOpts *opts, const char *params,
const char *firstname, bool prepend)
{
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) {
qerror_report_err(local_err);
error_free(local_err);
return -1;
}
}
if (*p != ',') {
break;
}
}
return 0;
}
int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname)
{
return opts_do_parse(opts, params, firstname, false);
}
static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
int permit_abbrev, bool defaults)
{
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) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
}
return NULL;
}
if (opts_do_parse(opts, params, firstname, defaults) != 0) {
qemu_opts_del(opts);
return NULL;
}
return opts;
}
QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
int permit_abbrev)
{
return opts_parse(list, params, permit_abbrev, false);
}
void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
int permit_abbrev)
{
QemuOpts *opts;
opts = opts_parse(list, params, permit_abbrev, true);
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_int(qobject_to_qbool(obj)) ? "on" : "off");
value = buf;
break;
default:
return;
}
qemu_opt_set_err(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_set(errp, QERR_INVALID_PARAMETER, opt->name);
return;
}
qemu_opt_parse(opt, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
}
int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
int abort_on_failure)
{
Location loc;
QemuOpts *opts;
int rc = 0;
loc_push_none(&loc);
QTAILQ_FOREACH(opts, &list->head, next) {
loc_restore(&opts->loc);
rc |= func(opts, opaque);
if (abort_on_failure && rc != 0)
break;
}
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;
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;
}
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;
QTAILQ_INIT(&dst->head);
dst->merge_lists = false;
}
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;
}
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