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libvirt/src/util/virdbus.c
Daniel Henrique Barboza 93af79fba3 util: remove unneeded cleanup labels 
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-12 17:54:01 +01:00

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/*
* virdbus.c: helper for using DBus
*
* Copyright (C) 2012-2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#define LIBVIRT_VIRDBUSPRIV_H_ALLOW
#include "virdbuspriv.h"
#include "viralloc.h"
#include "virerror.h"
#include "virlog.h"
#include "virthread.h"
#include "virstring.h"
#include "virprobe.h"
#define VIR_FROM_THIS VIR_FROM_DBUS
VIR_LOG_INIT("util.dbus");
#ifdef WITH_DBUS
static bool sharedBus = true;
static DBusConnection *systembus;
static DBusConnection *sessionbus;
static virOnceControl systemonce = VIR_ONCE_CONTROL_INITIALIZER;
static virOnceControl sessiononce = VIR_ONCE_CONTROL_INITIALIZER;
static DBusError systemdbuserr;
static DBusError sessiondbuserr;
static dbus_bool_t virDBusAddWatch(DBusWatch *watch, void *data);
static void virDBusRemoveWatch(DBusWatch *watch, void *data);
static void virDBusToggleWatch(DBusWatch *watch, void *data);
void virDBusSetSharedBus(bool shared)
{
sharedBus = shared;
}
static DBusConnection *virDBusBusInit(DBusBusType type, DBusError *dbuserr)
{
DBusConnection *bus;
/* Allocate and initialize a new HAL context */
dbus_connection_set_change_sigpipe(FALSE);
dbus_threads_init_default();
dbus_error_init(dbuserr);
bus = sharedBus ?
dbus_bus_get(type, dbuserr) :
dbus_bus_get_private(type, dbuserr);
if (!bus)
return NULL;
dbus_connection_set_exit_on_disconnect(bus, FALSE);
/* Register dbus watch callbacks */
if (!dbus_connection_set_watch_functions(bus,
virDBusAddWatch,
virDBusRemoveWatch,
virDBusToggleWatch,
bus, NULL)) {
return NULL;
}
return bus;
}
static void virDBusSystemBusInit(void)
{
systembus = virDBusBusInit(DBUS_BUS_SYSTEM, &systemdbuserr);
}
static DBusConnection *
virDBusGetSystemBusInternal(void)
{
if (virOnce(&systemonce, virDBusSystemBusInit) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to run one time DBus initializer"));
return NULL;
}
return systembus;
}
DBusConnection *
virDBusGetSystemBus(void)
{
DBusConnection *bus;
if (!(bus = virDBusGetSystemBusInternal())) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to get DBus system bus connection: %s"),
systemdbuserr.message ? systemdbuserr.message : "watch setup failed");
return NULL;
}
return bus;
}
/**
* virDBusHasSystemBus:
*
* Check if dbus system bus is running. This does not
* imply that we have a connection. DBus might be running
* and refusing connections due to its client limit. The
* latter must be treated as a fatal error.
*
* Return false if dbus is not available, true if probably available.
*/
bool
virDBusHasSystemBus(void)
{
if (virDBusGetSystemBusInternal())
return true;
if (systemdbuserr.name &&
(STREQ(systemdbuserr.name, "org.freedesktop.DBus.Error.FileNotFound") ||
STREQ(systemdbuserr.name, "org.freedesktop.DBus.Error.NoServer"))) {
VIR_DEBUG("System DBus not available: %s", NULLSTR(systemdbuserr.message));
return false;
}
return true;
}
void virDBusCloseSystemBus(void)
{
if (systembus && !sharedBus) {
dbus_connection_close(systembus);
dbus_connection_unref(systembus);
systembus = NULL;
}
}
static void virDBusSessionBusInit(void)
{
sessionbus = virDBusBusInit(DBUS_BUS_SESSION, &sessiondbuserr);
}
DBusConnection *virDBusGetSessionBus(void)
{
if (virOnce(&sessiononce, virDBusSessionBusInit) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to run one time DBus initializer"));
return NULL;
}
if (!sessionbus) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to get DBus session bus connection: %s"),
sessiondbuserr.message ? sessiondbuserr.message : "watch setup failed");
return NULL;
}
return sessionbus;
}
struct virDBusWatch
{
int watch;
DBusConnection *bus;
};
static void virDBusWatchCallback(int fdatch G_GNUC_UNUSED,
int fd G_GNUC_UNUSED,
int events, void *opaque)
{
DBusWatch *watch = opaque;
struct virDBusWatch *info;
int dbus_flags = 0;
info = dbus_watch_get_data(watch);
if (events & VIR_EVENT_HANDLE_READABLE)
dbus_flags |= DBUS_WATCH_READABLE;
if (events & VIR_EVENT_HANDLE_WRITABLE)
dbus_flags |= DBUS_WATCH_WRITABLE;
if (events & VIR_EVENT_HANDLE_ERROR)
dbus_flags |= DBUS_WATCH_ERROR;
if (events & VIR_EVENT_HANDLE_HANGUP)
dbus_flags |= DBUS_WATCH_HANGUP;
if (dbus_watch_handle(watch, dbus_flags) == FALSE)
VIR_DEBUG("dbus_watch_handle() returned FALSE");
dbus_connection_ref(info->bus);
while (dbus_connection_dispatch(info->bus) == DBUS_DISPATCH_DATA_REMAINS)
/* keep dispatching while data remains */;
dbus_connection_unref(info->bus);
}
static int virDBusTranslateWatchFlags(int dbus_flags)
{
unsigned int flags = 0;
if (dbus_flags & DBUS_WATCH_READABLE)
flags |= VIR_EVENT_HANDLE_READABLE;
if (dbus_flags & DBUS_WATCH_WRITABLE)
flags |= VIR_EVENT_HANDLE_WRITABLE;
if (dbus_flags & DBUS_WATCH_ERROR)
flags |= VIR_EVENT_HANDLE_ERROR;
if (dbus_flags & DBUS_WATCH_HANGUP)
flags |= VIR_EVENT_HANDLE_HANGUP;
return flags;
}
static void virDBusWatchFree(void *data)
{
struct virDBusWatch *info = data;
VIR_FREE(info);
}
static dbus_bool_t virDBusAddWatch(DBusWatch *watch,
void *data)
{
int flags = 0;
int fd;
struct virDBusWatch *info;
if (VIR_ALLOC(info) < 0)
return FALSE;
if (dbus_watch_get_enabled(watch))
flags = virDBusTranslateWatchFlags(dbus_watch_get_flags(watch));
# if HAVE_DBUS_WATCH_GET_UNIX_FD
fd = dbus_watch_get_unix_fd(watch);
# else
fd = dbus_watch_get_fd(watch);
# endif
dbus_watch_set_data(watch, info, virDBusWatchFree);
info->bus = (DBusConnection *)data;
info->watch = virEventAddHandle(fd, flags,
virDBusWatchCallback,
watch, NULL);
if (info->watch < 0) {
dbus_watch_set_data(watch, NULL, NULL);
return FALSE;
}
return TRUE;
}
static void virDBusRemoveWatch(DBusWatch *watch,
void *data G_GNUC_UNUSED)
{
struct virDBusWatch *info;
info = dbus_watch_get_data(watch);
(void)virEventRemoveHandle(info->watch);
}
static void virDBusToggleWatch(DBusWatch *watch,
void *data G_GNUC_UNUSED)
{
int flags = 0;
struct virDBusWatch *info;
if (dbus_watch_get_enabled(watch))
flags = virDBusTranslateWatchFlags(dbus_watch_get_flags(watch));
info = dbus_watch_get_data(watch);
(void)virEventUpdateHandle(info->watch, flags);
}
# define VIR_DBUS_TYPE_STACK_MAX_DEPTH 32
static const char virDBusBasicTypes[] = {
DBUS_TYPE_BYTE,
DBUS_TYPE_BOOLEAN,
DBUS_TYPE_INT16,
DBUS_TYPE_UINT16,
DBUS_TYPE_INT32,
DBUS_TYPE_UINT32,
DBUS_TYPE_INT64,
DBUS_TYPE_UINT64,
DBUS_TYPE_DOUBLE,
DBUS_TYPE_STRING,
DBUS_TYPE_OBJECT_PATH,
DBUS_TYPE_SIGNATURE,
};
static bool virDBusIsBasicType(char c)
{
return !!memchr(virDBusBasicTypes, c, G_N_ELEMENTS(virDBusBasicTypes));
}
/*
* All code related to virDBusMessageIterEncode and
* virDBusMessageIterDecode is derived from systemd
* bus_message_append_ap()/message_read_ap() in
* bus-message.c under the terms of the LGPLv2+
*/
static int
virDBusSignatureLengthInternal(const char *s,
bool allowDict,
unsigned arrayDepth,
unsigned structDepth,
size_t *skiplen,
size_t *siglen)
{
if (virDBusIsBasicType(*s) || *s == DBUS_TYPE_VARIANT) {
*skiplen = *siglen = 1;
return 0;
}
if (*s == DBUS_TYPE_ARRAY) {
size_t skiplencont;
size_t siglencont;
bool arrayref = false;
if (arrayDepth >= VIR_DBUS_TYPE_STACK_MAX_DEPTH) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Signature '%s' too deeply nested"),
s);
return -1;
}
if (*(s + 1) == '&') {
arrayref = true;
s++;
}
if (virDBusSignatureLengthInternal(s + 1,
true,
arrayDepth + 1,
structDepth,
&skiplencont,
&siglencont) < 0)
return -1;
*skiplen = skiplencont + 1;
*siglen = siglencont + 1;
if (arrayref)
(*skiplen)++;
return 0;
}
if (*s == DBUS_STRUCT_BEGIN_CHAR) {
const char *p = s + 1;
if (structDepth >= VIR_DBUS_TYPE_STACK_MAX_DEPTH) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Signature '%s' too deeply nested"),
s);
return -1;
}
*skiplen = *siglen = 2;
while (*p != DBUS_STRUCT_END_CHAR) {
size_t skiplencont;
size_t siglencont;
if (virDBusSignatureLengthInternal(p,
false,
arrayDepth,
structDepth + 1,
&skiplencont,
&siglencont) < 0)
return -1;
p += skiplencont;
*skiplen += skiplencont;
*siglen += siglencont;
}
return 0;
}
if (*s == DBUS_DICT_ENTRY_BEGIN_CHAR && allowDict) {
const char *p = s + 1;
unsigned n = 0;
if (structDepth >= VIR_DBUS_TYPE_STACK_MAX_DEPTH) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Signature '%s' too deeply nested"),
s);
return -1;
}
*skiplen = *siglen = 2;
while (*p != DBUS_DICT_ENTRY_END_CHAR) {
size_t skiplencont;
size_t siglencont;
if (n == 0 && !virDBusIsBasicType(*p)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Dict entry in signature '%s' must be a basic type"),
s);
return -1;
}
if (virDBusSignatureLengthInternal(p,
false,
arrayDepth,
structDepth + 1,
&skiplencont,
&siglencont) < 0)
return -1;
p += skiplencont;
*skiplen += skiplencont;
*siglen += siglencont;
n++;
}
if (n != 2) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Dict entry in signature '%s' is wrong size"),
s);
return -1;
}
return 0;
}
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unexpected signature '%s'"), s);
return -1;
}
static int virDBusSignatureLength(const char *s, size_t *skiplen, size_t *siglen)
{
return virDBusSignatureLengthInternal(s, true, 0, 0, skiplen, siglen);
}
static char *virDBusCopyContainerSignature(const char *sig,
size_t *skiplen,
size_t *siglen)
{
size_t i, j;
char *contsig;
bool isGroup;
isGroup = (sig[0] == DBUS_STRUCT_BEGIN_CHAR ||
sig[0] == DBUS_DICT_ENTRY_BEGIN_CHAR);
if (virDBusSignatureLength(isGroup ? sig : sig + 1, skiplen, siglen) < 0)
return NULL;
if (VIR_ALLOC_N(contsig, *siglen + 1) < 0)
return NULL;
for (i = 0, j = 0; i < *skiplen && j < *siglen; i++) {
if (sig[i + 1] == '&')
continue;
contsig[j] = sig[i + 1];
j++;
}
contsig[*siglen] = '\0';
VIR_DEBUG("Extracted '%s' from '%s'", contsig, sig);
return contsig;
}
/* Ideally, we'd just call ourselves recursively on every
* complex type. However, the state of a va_list that is
* passed to a function is undefined after that function
* returns. This means we need to decode the va_list linearly
* in a single stackframe. We hence implement our own
* home-grown stack in an array. */
typedef struct _virDBusTypeStack virDBusTypeStack;
struct _virDBusTypeStack {
const char *types;
size_t nstruct;
size_t narray;
DBusMessageIter *iter;
};
static int virDBusTypeStackPush(virDBusTypeStack **stack,
size_t *nstack,
DBusMessageIter *iter,
const char *types,
size_t nstruct,
size_t narray)
{
if (*nstack >= VIR_DBUS_TYPE_STACK_MAX_DEPTH) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("DBus type too deeply nested"));
return -1;
}
if (VIR_EXPAND_N(*stack, *nstack, 1) < 0)
return -1;
(*stack)[(*nstack) - 1].iter = iter;
(*stack)[(*nstack) - 1].types = types;
(*stack)[(*nstack) - 1].nstruct = nstruct;
(*stack)[(*nstack) - 1].narray = narray;
VIR_DEBUG("Pushed types='%s' nstruct=%zu narray=%zd",
types, nstruct, (ssize_t)narray);
return 0;
}
static int virDBusTypeStackPop(virDBusTypeStack **stack,
size_t *nstack,
DBusMessageIter **iter,
const char **types,
size_t *nstruct,
size_t *narray)
{
if (*nstack == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("DBus type stack is empty"));
return -1;
}
*iter = (*stack)[(*nstack) - 1].iter;
*types = (*stack)[(*nstack) - 1].types;
*nstruct = (*stack)[(*nstack) - 1].nstruct;
*narray = (*stack)[(*nstack) - 1].narray;
VIR_DEBUG("Popped types='%s' nstruct=%zu narray=%zd",
*types, *nstruct, (ssize_t)*narray);
VIR_SHRINK_N(*stack, *nstack, 1);
return 0;
}
static void virDBusTypeStackFree(virDBusTypeStack **stack,
size_t *nstack)
{
size_t i;
if (!*stack)
return;
/* The iter in the first level of the stack is the
* root iter which must not be freed
*/
for (i = 1; i < *nstack; i++)
VIR_FREE((*stack)[i].iter);
VIR_FREE(*stack);
}
static bool
virDBusIsAllowedRefType(const char *sig)
{
if (*sig == '{') {
if (strlen(sig) != 4)
return false;
if (!virDBusIsBasicType(sig[1]) ||
!virDBusIsBasicType(sig[2]) ||
sig[1] != sig[2])
return false;
if (sig[3] != '}')
return false;
} else {
if (strlen(sig) != 1)
return false;
if (!virDBusIsBasicType(sig[0]))
return false;
}
return true;
}
# define SET_NEXT_VAL(dbustype, vargtype, arrtype, sigtype, fmt) \
do { \
dbustype x; \
if (arrayref) { \
arrtype valarray = arrayptr; \
x = (dbustype)*valarray; \
valarray++; \
arrayptr = valarray; \
} else { \
x = (dbustype)va_arg(args, vargtype); \
} \
if (!dbus_message_iter_append_basic(iter, sigtype, &x)) { \
virReportError(VIR_ERR_INTERNAL_ERROR, \
_("Cannot append basic type %s"), #vargtype);\
goto cleanup; \
} \
VIR_DEBUG("Appended basic type '" #dbustype "' varg '" #vargtype\
"' sig '%c' val '" fmt "'", sigtype, (vargtype)x); \
} while (0)
static int
virDBusMessageIterEncode(DBusMessageIter *rootiter,
const char *types,
va_list args)
{
int ret = -1;
size_t narray;
size_t nstruct;
bool arrayref = false;
void *arrayptr = NULL;
virDBusTypeStack *stack = NULL;
size_t nstack = 0;
size_t siglen;
size_t skiplen;
char *contsig = NULL;
const char *vsig;
DBusMessageIter *newiter = NULL;
DBusMessageIter *iter = rootiter;
VIR_DEBUG("rootiter=%p types=%s", rootiter, types);
if (!types)
return 0;
narray = (size_t)-1;
nstruct = strlen(types);
for (;;) {
const char *t;
VIR_DEBUG("Loop nstack=%zu narray=%zd nstruct=%zu types='%s'",
nstack, (ssize_t)narray, nstruct, types);
if (narray == 0 ||
(narray == (size_t)-1 &&
nstruct == 0)) {
DBusMessageIter *thisiter = iter;
if (*types != '}') {
VIR_DEBUG("Reset array ref");
arrayref = false;
arrayptr = NULL;
}
VIR_DEBUG("Popping iter=%p", iter);
if (nstack == 0)
break;
if (virDBusTypeStackPop(&stack, &nstack, &iter,
&types, &nstruct, &narray) < 0)
goto cleanup;
VIR_DEBUG("Popped iter=%p", iter);
if (!dbus_message_iter_close_container(iter, thisiter)) {
if (thisiter != rootiter)
VIR_FREE(thisiter);
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Cannot close container iterator"));
goto cleanup;
}
if (thisiter != rootiter)
VIR_FREE(thisiter);
continue;
}
t = types;
if (narray != (size_t)-1) {
narray--;
} else {
types++;
nstruct--;
}
switch (*t) {
case DBUS_TYPE_BYTE:
SET_NEXT_VAL(unsigned char, int, unsigned char *, *t, "%d");
break;
case DBUS_TYPE_BOOLEAN:
SET_NEXT_VAL(dbus_bool_t, int, bool *, *t, "%d");
break;
case DBUS_TYPE_INT16:
SET_NEXT_VAL(dbus_int16_t, int, short *, *t, "%d");
break;
case DBUS_TYPE_UINT16:
SET_NEXT_VAL(dbus_uint16_t, unsigned int, unsigned short *,
*t, "%d");
break;
case DBUS_TYPE_INT32:
SET_NEXT_VAL(dbus_int32_t, int, int *, *t, "%d");
break;
case DBUS_TYPE_UINT32:
SET_NEXT_VAL(dbus_uint32_t, unsigned int, unsigned int *,
*t, "%u");
break;
case DBUS_TYPE_INT64:
SET_NEXT_VAL(dbus_int64_t, long long, long long *, *t, "%lld");
break;
case DBUS_TYPE_UINT64:
SET_NEXT_VAL(dbus_uint64_t, unsigned long long,
unsigned long long *, *t, "%llu");
break;
case DBUS_TYPE_DOUBLE:
SET_NEXT_VAL(double, double, double *, *t, "%lf");
break;
case DBUS_TYPE_STRING:
case DBUS_TYPE_OBJECT_PATH:
case DBUS_TYPE_SIGNATURE:
SET_NEXT_VAL(char *, char *, char **, *t, "%s");
break;
case DBUS_TYPE_ARRAY:
arrayptr = NULL;
if (t[1] == '&') {
VIR_DEBUG("Got array ref");
t++;
types++;
nstruct--;
arrayref = true;
} else {
VIR_DEBUG("Got array non-ref");
arrayref = false;
}
if (!(contsig = virDBusCopyContainerSignature(t, &skiplen, &siglen)))
goto cleanup;
if (arrayref && !virDBusIsAllowedRefType(contsig)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Got array ref but '%s' is not a single basic type "
"or dict with matching key+value type"),
contsig);
goto cleanup;
}
if (narray == (size_t)-1) {
types += skiplen;
nstruct -= skiplen;
}
if (VIR_ALLOC(newiter) < 0)
goto cleanup;
VIR_DEBUG("Contsig '%s' skip='%zu' len='%zu'", contsig, skiplen, siglen);
if (!dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
contsig, newiter))
goto cleanup;
if (virDBusTypeStackPush(&stack, &nstack,
iter, types,
nstruct, narray) < 0) {
VIR_FREE(newiter);
goto cleanup;
}
VIR_FREE(contsig);
iter = g_steal_pointer(&newiter);
types = t + 1;
nstruct = skiplen;
narray = (size_t)va_arg(args, int);
if (arrayref)
arrayptr = va_arg(args, void *);
break;
case DBUS_TYPE_VARIANT:
vsig = va_arg(args, const char *);
if (!vsig) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Missing variant type signature"));
goto cleanup;
}
if (VIR_ALLOC(newiter) < 0)
goto cleanup;
if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT,
vsig, newiter))
goto cleanup;
if (virDBusTypeStackPush(&stack, &nstack,
iter, types,
nstruct, narray) < 0) {
VIR_FREE(newiter);
goto cleanup;
}
iter = g_steal_pointer(&newiter);
types = vsig;
nstruct = strlen(types);
narray = (size_t)-1;
break;
case DBUS_STRUCT_BEGIN_CHAR:
case DBUS_DICT_ENTRY_BEGIN_CHAR:
if (!(contsig = virDBusCopyContainerSignature(t, &skiplen, &siglen)))
goto cleanup;
if (VIR_ALLOC(newiter) < 0)
goto cleanup;
VIR_DEBUG("Contsig '%s' skip='%zu' len='%zu'", contsig, skiplen, siglen);
if (!dbus_message_iter_open_container(iter,
*t == DBUS_STRUCT_BEGIN_CHAR ?
DBUS_TYPE_STRUCT : DBUS_TYPE_DICT_ENTRY,
NULL, newiter))
goto cleanup;
if (narray == (size_t)-1) {
types += skiplen - 1;
nstruct -= skiplen - 1;
}
if (virDBusTypeStackPush(&stack, &nstack,
iter, types,
nstruct, narray) < 0) {
VIR_FREE(newiter);
goto cleanup;
}
VIR_FREE(contsig);
iter = g_steal_pointer(&newiter);
types = t + 1;
nstruct = skiplen - 2;
narray = (size_t)-1;
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown type '%x' in signature '%s'"),
(int)*t, types);
goto cleanup;
}
}
ret = 0;
cleanup:
while (nstack > 0) {
DBusMessageIter *thisiter = iter;
VIR_DEBUG("Popping iter=%p", iter);
ignore_value(virDBusTypeStackPop(&stack, &nstack, &iter,
&types, &nstruct, &narray));
VIR_DEBUG("Popped iter=%p", iter);
if (thisiter != rootiter)
VIR_FREE(thisiter);
}
virDBusTypeStackFree(&stack, &nstack);
VIR_FREE(contsig);
VIR_FREE(newiter);
return ret;
}
# undef SET_NEXT_VAL
# define GET_NEXT_VAL(dbustype, member, vargtype, fmt) \
do { \
DBusBasicValue v; \
dbustype *x = (dbustype *)&v.member; \
vargtype *y; \
if (arrayref) { \
VIR_DEBUG("Use arrayref"); \
vargtype **xptrptr = arrayptr; \
if (VIR_EXPAND_N(*xptrptr, *narrayptr, 1) < 0) \
goto cleanup; \
y = (*xptrptr + (*narrayptr - 1)); \
VIR_DEBUG("Expanded to %zu", *narrayptr); \
} else { \
y = va_arg(args, vargtype *); \
} \
dbus_message_iter_get_basic(iter, x); \
*y = *x; \
VIR_DEBUG("Read basic type '" #dbustype "' varg '" #vargtype \
"' val '" fmt "'", (vargtype)*y); \
} while (0)
static int
virDBusMessageIterDecode(DBusMessageIter *rootiter,
const char *types,
va_list args)
{
int ret = -1;
size_t narray;
size_t nstruct;
bool arrayref = false;
void *arrayptr = NULL;
size_t *narrayptr = 0;
virDBusTypeStack *stack = NULL;
size_t nstack = 0;
size_t skiplen;
size_t siglen;
char *contsig = NULL;
const char *vsig;
DBusMessageIter *newiter = NULL;
DBusMessageIter *iter = rootiter;
VIR_DEBUG("rootiter=%p types=%s", rootiter, types);
if (!types)
return 0;
narray = (size_t)-1;
nstruct = strlen(types);
for (;;) {
const char *t;
bool advanceiter = true;
VIR_DEBUG("Loop nstack=%zu narray=%zd nstruct=%zu type='%s'",
nstack, (ssize_t)narray, nstruct, types);
if (narray == 0 ||
(narray == (size_t)-1 &&
nstruct == 0)) {
DBusMessageIter *thisiter = iter;
VIR_DEBUG("Popping iter=%p", iter);
if (nstack == 0)
break;
if (virDBusTypeStackPop(&stack, &nstack, &iter,
&types, &nstruct, &narray) < 0)
goto cleanup;
VIR_DEBUG("Popped iter=%p types=%s", iter, types);
if (strchr(types, '}') == NULL) {
arrayref = false;
arrayptr = NULL;
VIR_DEBUG("Clear array ref flag");
}
if (thisiter != rootiter)
VIR_FREE(thisiter);
if (arrayref) {
if (!dbus_message_iter_has_next(iter))
narray = 0;
else
narray = 1;
VIR_DEBUG("Pop set narray=%zd", (ssize_t)narray);
}
if (!(narray == 0 ||
(narray == (size_t)-1 &&
nstruct == 0)) &&
!dbus_message_iter_next(iter)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Not enough fields in message for signature"));
goto cleanup;
}
continue;
}
t = types;
if (narray != (size_t)-1) {
if (!arrayref)
narray--;
} else {
types++;
nstruct--;
}
switch (*t) {
case DBUS_TYPE_BYTE:
GET_NEXT_VAL(unsigned char, byt, unsigned char, "%d");
break;
case DBUS_TYPE_BOOLEAN:
GET_NEXT_VAL(dbus_bool_t, bool_val, bool, "%d");
break;
case DBUS_TYPE_INT16:
GET_NEXT_VAL(dbus_int16_t, i16, short, "%d");
break;
case DBUS_TYPE_UINT16:
GET_NEXT_VAL(dbus_uint16_t, u16, unsigned short, "%d");
break;
case DBUS_TYPE_INT32:
GET_NEXT_VAL(dbus_uint32_t, i32, int, "%d");
break;
case DBUS_TYPE_UINT32:
GET_NEXT_VAL(dbus_uint32_t, u32, unsigned int, "%u");
break;
case DBUS_TYPE_INT64:
GET_NEXT_VAL(dbus_uint64_t, i64, long long, "%lld");
break;
case DBUS_TYPE_UINT64:
GET_NEXT_VAL(dbus_uint64_t, u64, unsigned long long, "%llu");
break;
case DBUS_TYPE_DOUBLE:
GET_NEXT_VAL(double, dbl, double, "%lf");
break;
case DBUS_TYPE_STRING:
case DBUS_TYPE_OBJECT_PATH:
case DBUS_TYPE_SIGNATURE:
do {
char **x;
if (arrayref) {
char ***xptrptr = arrayptr;
if (VIR_EXPAND_N(*xptrptr, *narrayptr, 1) < 0)
goto cleanup;
x = (char **)(*xptrptr + (*narrayptr - 1));
VIR_DEBUG("Expanded to %zu", *narrayptr);
} else {
x = (char **)va_arg(args, char **);
}
char *s;
dbus_message_iter_get_basic(iter, &s);
*x = g_strdup(s);
VIR_DEBUG("Read basic type 'char *' varg 'char **'"
"' val '%s'", *x);
} while (0);
break;
case DBUS_TYPE_ARRAY:
arrayptr = NULL;
if (t[1] == '&') {
VIR_DEBUG("Got array ref");
t++;
types++;
nstruct--;
arrayref = true;
} else {
VIR_DEBUG("Got array non-ref");
arrayref = false;
}
advanceiter = false;
if (!(contsig = virDBusCopyContainerSignature(t, &skiplen, &siglen)))
goto cleanup;
if (arrayref && !virDBusIsAllowedRefType(contsig)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Got array ref but '%s' is not a single basic type / dict"),
contsig);
goto cleanup;
}
if (narray == (size_t)-1) {
types += skiplen;
nstruct -= skiplen;
}
if (VIR_ALLOC(newiter) < 0)
goto cleanup;
VIR_DEBUG("Array contsig='%s' skip=%'zu' len='%zu' types='%s'",
contsig, skiplen, siglen, types);
dbus_message_iter_recurse(iter, newiter);
if (virDBusTypeStackPush(&stack, &nstack,
iter, types,
nstruct, narray) < 0)
goto cleanup;
VIR_FREE(contsig);
iter = g_steal_pointer(&newiter);
types = t + 1;
nstruct = skiplen;
if (arrayref) {
narrayptr = va_arg(args, size_t *);
arrayptr = va_arg(args, void *);
*narrayptr = 0;
*(char **)arrayptr = NULL;
} else {
narray = va_arg(args, int);
}
break;
case DBUS_TYPE_VARIANT:
advanceiter = false;
vsig = va_arg(args, const char *);
if (!vsig) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Missing variant type signature"));
goto cleanup;
}
if (VIR_ALLOC(newiter) < 0)
goto cleanup;
dbus_message_iter_recurse(iter, newiter);
if (virDBusTypeStackPush(&stack, &nstack,
iter, types,
nstruct, narray) < 0) {
VIR_DEBUG("Push failed");
goto cleanup;
}
iter = g_steal_pointer(&newiter);
types = vsig;
nstruct = strlen(types);
narray = (size_t)-1;
break;
case DBUS_STRUCT_BEGIN_CHAR:
case DBUS_DICT_ENTRY_BEGIN_CHAR:
advanceiter = false;
if (!(contsig = virDBusCopyContainerSignature(t, &skiplen, &siglen)))
goto cleanup;
if (VIR_ALLOC(newiter) < 0)
goto cleanup;
VIR_DEBUG("Dict/struct contsig='%s' skip='%zu' len='%zu' types='%s'",
contsig, skiplen, siglen, types);
dbus_message_iter_recurse(iter, newiter);
if (narray == (size_t)-1) {
types += skiplen - 1;
nstruct -= skiplen - 1;
}
if (virDBusTypeStackPush(&stack, &nstack,
iter, types,
nstruct, narray) < 0)
goto cleanup;
VIR_FREE(contsig);
iter = g_steal_pointer(&newiter);
types = t + 1;
nstruct = skiplen - 2;
narray = (size_t)-1;
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown type '%c' in signature '%s'"),
*t, types);
goto cleanup;
}
VIR_DEBUG("After nstack=%zu narray=%zd nstruct=%zu types='%s'",
nstack, (ssize_t)narray, nstruct, types);
if (arrayref) {
if (dbus_message_iter_get_arg_type(iter) == DBUS_TYPE_INVALID) {
narray = 0;
} else {
if (advanceiter)
dbus_message_iter_next(iter);
if (dbus_message_iter_get_arg_type(iter) == DBUS_TYPE_INVALID) {
narray = 0;
} else {
narray = 1;
}
}
VIR_DEBUG("Set narray=%zd", (ssize_t)narray);
} else {
if (advanceiter &&
!(narray == 0 ||
(narray == (size_t)-1 &&
nstruct == 0)) &&
!dbus_message_iter_next(iter)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Not enough fields in message for signature"));
goto cleanup;
}
}
}
if (dbus_message_iter_has_next(iter)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Too many fields in message for signature"));
goto cleanup;
}
ret = 0;
cleanup:
virDBusTypeStackFree(&stack, &nstack);
VIR_FREE(contsig);
VIR_FREE(newiter);
return ret;
}
# undef GET_NEXT_VAL
int
virDBusMessageEncodeArgs(DBusMessage* msg,
const char *types,
va_list args)
{
DBusMessageIter iter;
memset(&iter, 0, sizeof(iter));
dbus_message_iter_init_append(msg, &iter);
return virDBusMessageIterEncode(&iter, types, args);
}
int virDBusMessageDecodeArgs(DBusMessage* msg,
const char *types,
va_list args)
{
DBusMessageIter iter;
if (!dbus_message_iter_init(msg, &iter)) {
if (*types != '\0') {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("No args present for signature %s"),
types);
} else {
return 0;
}
return -1;
}
return virDBusMessageIterDecode(&iter, types, args);
}
int virDBusMessageEncode(DBusMessage* msg,
const char *types,
...)
{
int ret;
va_list args;
va_start(args, types);
ret = virDBusMessageEncodeArgs(msg, types, args);
va_end(args);
return ret;
}
/**
* virDBusMessageDecode:
* @msg: the reply to decode
* @types: type signature for following return values
* @...: pointers in which to store return values
*
* The @types type signature is the same format as
* that used for the virDBusCallMethod. The difference
* is that each variadic parameter must be a pointer to
* be filled with the values. eg instead of passing an
* 'int', pass an 'int *'.
*
*/
int
virDBusMessageDecode(DBusMessage* msg,
const char *types,
...)
{
int ret;
va_list args;
va_start(args, types);
ret = virDBusMessageDecodeArgs(msg, types, args);
va_end(args);
return ret;
}
# define VIR_DBUS_METHOD_CALL_TIMEOUT_MILLIS 30 * 1000
/**
* virDBusCreateMethodV:
* @call: pointer to be filled with a method call message
* @destination: bus identifier of the target service
* @path: object path of the target service
* @iface: the interface of the object
* @member: the name of the method in the interface
* @types: type signature for following method arguments
* @args: method arguments
*
* This creates a DBus method call message and saves a
* pointer to it in @call. The @destination, @path, @iface
* and @member parameters identify the object method to
* be invoked. The optional @replyout parameter will be
* filled with any reply to the method call. The method
* can be later invoked using virDBusCall.
*
* The @types parameter is a DBus signature describing
* the method call parameters which will be provided
* as variadic args. Each character in @types must
* correspond to one of the following DBus codes for
* basic types:
*
* 'y' - 8-bit byte, promoted to an 'int'
* 'b' - bool value, promoted to an 'int'
* 'n' - 16-bit signed integer, promoted to an 'int'
* 'q' - 16-bit unsigned integer, promoted to an 'int'
* 'i' - 32-bit signed integer, passed as an 'int'
* 'u' - 32-bit unsigned integer, passed as an 'int'
* 'x' - 64-bit signed integer, passed as a 'long long'
* 't' - 64-bit unsigned integer, passed as an 'unsigned long long'
* 'd' - 8-byte floating point, passed as a 'double'
* 's' - NUL-terminated string, in UTF-8
* 'o' - NUL-terminated string, representing a valid object path
* 'g' - NUL-terminated string, representing a valid type signature
*
* or use one of the compound types
*
* 'a' - array of values
* 'v' - a variadic type.
* '(' - start of a struct
* ')' - end of a struct
* '{' - start of a dictionary entry (pair of types)
* '}' - start of a dictionary entry (pair of types)
*
* At this time, there is no support for Unix fd's ('h'), which only
* newer DBus supports.
*
* Passing values in variadic args for basic types is
* simple, the value is just passed directly using the
* corresponding C type listed against the type code
* above. Note how any integer value smaller than an
* 'int' is promoted to an 'int' by the C rules for
* variadic args.
*
* Passing values in variadic args for compound types
* requires a little further explanation.
*
* - Variant: the first arg is a string containing
* the type signature for the values to be stored
* inside the variant. This is then followed by
* the values corresponding to the type signature
* in the normal manner.
*
* - Array: when 'a' appears in a type signature, it
* must be followed by a single type describing the
* array element type. For example 'as' is an array
* of strings. 'a(is)' is an array of structs, each
* struct containing an int and a string.
*
* The first variadic arg for an array, is an 'int'
* specifying the number of elements in the array.
* This is then followed by additional variadic args,
* one for each element of the array.
*
* - Array reference: when 'a' appears in a type signature,
* followed by '&', this signifies an array passed by
* reference.
*
* Array references may only be used when the
* element values are basic types, or a dict
* entry where both keys and values are using
* the same basic type.
*
* The first variadic arg for an array, is an 'int'
* specifying the number of elements in the array.
* When the element is a basic type, the second
* variadic arg is a pointer to an array containing
* the element values. When the element is a dict
* entry, the second variadic arg is a pointer to
* an array containing the dict keys, and the
* third variadic arg is a pointer to an array
* containing the dict values.
*
* - Struct: when a '(' appears in a type signature,
* it must be followed by one or more types describing
* the elements in the array, terminated by a ')'.
*
* - Dict entry: when a '{' appears in a type signature it
* must be followed by exactly two types, one describing
* the type of the hash key, the other describing the
* type of the hash entry. The hash key type must be
* a basic type, not a compound type.
*
* Example signatures, with their corresponding variadic
* args:
*
* - "biiss" - some basic types
*
* (true, 7, 42, "hello", "world")
*
* - "as" - an array with a basic type element
*
* (3, "one", "two", "three")
*
* - "a(is)" - an array with a struct element
*
* (3, 1, "one", 2, "two", 3, "three")
*
* - "svs" - some basic types with a variant as an int
*
* ("hello", "i", 3, "world")
*
* - "svs" - some basic types with a variant as an array of ints
*
* ("hello", "ai", 4, 1, 2, 3, 4, "world")
*
* - "a{ss}" - a hash table (aka array + dict entry)
*
* (3, "title", "Mr", "forename", "Joe", "surname", "Bloggs")
*
* - "a{sv}" - a hash table (aka array + dict entry)
*
* (3, "email", "s", "joe@blogs.com", "age", "i", 35,
* "address", "as", 3, "Some house", "Some road", "some city")
*/
int virDBusCreateMethodV(DBusMessage **call,
const char *destination,
const char *path,
const char *iface,
const char *member,
const char *types,
va_list args)
{
if (!(*call = dbus_message_new_method_call(destination,
path,
iface,
member))) {
virReportOOMError();
return -1;
}
if (virDBusMessageEncodeArgs(*call, types, args) < 0) {
virDBusMessageUnref(*call);
*call = NULL;
return -1;
}
return 0;
}
/**
* virDBusCreateMethod:
* @call: pointer to be filled with a method call message
* @destination: bus identifier of the target service
* @path: object path of the target service
* @iface: the interface of the object
* @member: the name of the method in the interface
* @types: type signature for following method arguments
* @...: method arguments
*
* See virDBusCreateMethodV for a description of the
* behaviour of this method.
*/
int virDBusCreateMethod(DBusMessage **call,
const char *destination,
const char *path,
const char *iface,
const char *member,
const char *types, ...)
{
va_list args;
int ret;
va_start(args, types);
ret = virDBusCreateMethodV(call, destination, path,
iface, member, types, args);
va_end(args);
return ret;
}
/**
* virDBusCreateReplyV:
* @reply: pointer to be filled with a method reply message
* @types: type signature for following method arguments
* @args: method arguments
*
* This creates a DBus method reply message and saves a
* pointer to it in @reply.
*
* The @types parameter is a DBus signature describing
* the method call parameters which will be provided
* as variadic args. See virDBusCreateMethodV for a
* description of this parameter.
*/
int virDBusCreateReplyV(DBusMessage **reply,
const char *types,
va_list args)
{
if (!(*reply = dbus_message_new(DBUS_MESSAGE_TYPE_METHOD_RETURN))) {
virReportOOMError();
return -1;
}
if (virDBusMessageEncodeArgs(*reply, types, args) < 0) {
virDBusMessageUnref(*reply);
*reply = NULL;
return -1;
}
return 0;
}
/**
* virDBusCreateReply:
* @reply: pointer to be filled with a method reply message
* @types: type signature for following method arguments
* @...: method arguments
*
* See virDBusCreateReplyV for a description of the
* behaviour of this method.
*/
int virDBusCreateReply(DBusMessage **reply,
const char *types, ...)
{
va_list args;
int ret;
va_start(args, types);
ret = virDBusCreateReplyV(reply, types, args);
va_end(args);
return ret;
}
/**
* virDBusCall:
* @conn: a DBus connection
* @call: pointer to a message to send
* @replyout: pointer to receive reply message, or NULL
* @error: pointer to receive error message
*
* This invokes a method encoded in @call on a remote
* service on the DBus bus @conn. The optional @replyout
* parameter will be filled with any reply to the method
* call. The virDBusMethodReply method can be used to
* decode the return values.
*
* If @error is NULL then a libvirt error will be raised
* when a DBus error is received and the return value will
* be -1. If @error is non-NULL then any DBus error will
* be saved into that object and the return value will
* be 0.
*
* Returns 0 on success, or -1 upon error
*/
static int
virDBusCall(DBusConnection *conn,
DBusMessage *call,
DBusMessage **replyout,
virErrorPtr error)
{
DBusMessage *reply = NULL;
DBusError localerror;
int ret = -1;
const char *iface, *member, *path, *dest;
dbus_error_init(&localerror);
if (error)
memset(error, 0, sizeof(*error));
iface = dbus_message_get_interface(call);
member = dbus_message_get_member(call);
path = dbus_message_get_path(call);
dest = dbus_message_get_destination(call);
PROBE(DBUS_METHOD_CALL,
"'%s.%s' on '%s' at '%s'",
iface, member, path, dest);
if (!(reply = dbus_connection_send_with_reply_and_block(conn,
call,
VIR_DBUS_METHOD_CALL_TIMEOUT_MILLIS,
&localerror))) {
PROBE(DBUS_METHOD_ERROR,
"'%s.%s' on '%s' at '%s' error %s: %s",
iface, member, path, dest,
localerror.name,
localerror.message);
if (error) {
error->level = VIR_ERR_ERROR;
error->code = VIR_ERR_DBUS_SERVICE;
error->domain = VIR_FROM_DBUS;
error->message = g_strdup(localerror.message);
error->str1 = g_strdup(localerror.name);
ret = 0;
} else {
virReportError(VIR_ERR_DBUS_SERVICE, _("%s: %s"), member,
localerror.message ? : _("unknown error"));
}
goto cleanup;
}
PROBE(DBUS_METHOD_REPLY,
"'%s.%s' on '%s' at '%s'",
iface, member, path, dest);
ret = 0;
cleanup:
if (ret < 0 && error)
virResetError(error);
dbus_error_free(&localerror);
if (reply) {
if (ret == 0 && replyout)
*replyout = reply;
else
virDBusMessageUnref(reply);
}
return ret;
}
/**
* virDBusCallMethod:
* @conn: a DBus connection
* @replyout: pointer to receive reply message, or NULL
* @destination: bus identifier of the target service
* @path: object path of the target service
* @iface: the interface of the object
* @member: the name of the method in the interface
* @types: type signature for following method arguments
* @...: method arguments
*
* This invokes a method on a remote service on the
* DBus bus @conn. The @destination, @path, @iface
* and @member parameters identify the object method to
* be invoked. The optional @replyout parameter will be
* filled with any reply to the method call. The
* virDBusMethodReply method can be used to decode the
* return values.
*
* The @types parameter is a DBus signature describing
* the method call parameters which will be provided
* as variadic args. See virDBusCreateMethodV for a
* description of this parameter.
*
*
* If @error is NULL then a libvirt error will be raised
* when a DBus error is received and the return value will
* be -1. If @error is non-NULL then any DBus error will
* be saved into that object and the return value will
* be 0. If an error occurs while encoding method args
* the return value will always be -1 regardless of whether
* @error is set.
*
* Returns 0 on success, or -1 upon error
*/
int virDBusCallMethod(DBusConnection *conn,
DBusMessage **replyout,
virErrorPtr error,
const char *destination,
const char *path,
const char *iface,
const char *member,
const char *types, ...)
{
DBusMessage *call = NULL;
int ret = -1;
va_list args;
va_start(args, types);
ret = virDBusCreateMethodV(&call, destination, path,
iface, member, types, args);
va_end(args);
if (ret < 0)
goto cleanup;
ret = virDBusCall(conn, call, replyout, error);
cleanup:
virDBusMessageUnref(call);
return ret;
}
static int virDBusIsServiceInList(const char *listMethod, const char *name)
{
DBusConnection *conn;
DBusMessage *reply = NULL;
DBusMessageIter iter, sub;
int ret = -1;
if (!virDBusHasSystemBus())
return -2;
if (!(conn = virDBusGetSystemBus()))
return -1;
if (virDBusCallMethod(conn,
&reply,
NULL,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
listMethod,
NULL) < 0)
return ret;
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Reply message incorrect"));
goto cleanup;
}
ret = -2;
dbus_message_iter_recurse(&iter, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) {
const char *service = NULL;
dbus_message_iter_get_basic(&sub, &service);
dbus_message_iter_next(&sub);
if (STREQ(service, name)) {
ret = 0;
break;
}
}
cleanup:
virDBusMessageUnref(reply);
return ret;
}
/**
* virDBusIsServiceEnabled:
* @name: service name
*
* Returns 0 if service is available, -1 on fatal error, or -2 if service is not available
*/
int virDBusIsServiceEnabled(const char *name)
{
int ret = virDBusIsServiceInList("ListActivatableNames", name);
VIR_DEBUG("Service %s is %s", name, ret ? "unavailable" : "available");
return ret;
}
/**
* virDBusIsServiceRegistered
* @name: service name
*
* Returns 0 if service is registered, -1 on fatal error, or -2 if service is not registered
*/
int virDBusIsServiceRegistered(const char *name)
{
int ret = virDBusIsServiceInList("ListNames", name);
VIR_DEBUG("Service %s is %s", name, ret ? "not registered" : "registered");
return ret;
}
void virDBusMessageUnref(DBusMessage *msg)
{
if (msg)
dbus_message_unref(msg);
}
#else /* ! WITH_DBUS */
void virDBusSetSharedBus(bool shared G_GNUC_UNUSED)
{
/* nothing */
}
DBusConnection *virDBusGetSystemBus(void)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return NULL;
}
bool
virDBusHasSystemBus(void)
{
VIR_DEBUG("DBus support not compiled into this binary");
return false;
}
void virDBusCloseSystemBus(void)
{
/* nothing */
}
DBusConnection *virDBusGetSessionBus(void)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return NULL;
}
int virDBusCreateMethod(DBusMessage **call G_GNUC_UNUSED,
const char *destination G_GNUC_UNUSED,
const char *path G_GNUC_UNUSED,
const char *iface G_GNUC_UNUSED,
const char *member G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED, ...)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusCreateMethodV(DBusMessage **call G_GNUC_UNUSED,
const char *destination G_GNUC_UNUSED,
const char *path G_GNUC_UNUSED,
const char *iface G_GNUC_UNUSED,
const char *member G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED,
va_list args G_GNUC_UNUSED)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusCreateReplyV(DBusMessage **reply G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED,
va_list args G_GNUC_UNUSED)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusCreateReply(DBusMessage **reply G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED, ...)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusCallMethod(DBusConnection *conn G_GNUC_UNUSED,
DBusMessage **reply G_GNUC_UNUSED,
virErrorPtr error G_GNUC_UNUSED,
const char *destination G_GNUC_UNUSED,
const char *path G_GNUC_UNUSED,
const char *iface G_GNUC_UNUSED,
const char *member G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED, ...)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusMessageEncode(DBusMessage* msg G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED,
...)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusMessageDecode(DBusMessage* msg G_GNUC_UNUSED,
const char *types G_GNUC_UNUSED,
...)
{
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("DBus support not compiled into this binary"));
return -1;
}
int virDBusIsServiceEnabled(const char *name G_GNUC_UNUSED)
{
VIR_DEBUG("DBus support not compiled into this binary");
return -2;
}
int virDBusIsServiceRegistered(const char *name G_GNUC_UNUSED)
{
VIR_DEBUG("DBus support not compiled into this binary");
return -2;
}
void virDBusMessageUnref(DBusMessage *msg G_GNUC_UNUSED)
{
/* nothing */
}
#endif /* ! WITH_DBUS */
bool virDBusErrorIsUnknownMethod(virErrorPtr err)
{
return err->domain == VIR_FROM_DBUS &&
err->code == VIR_ERR_DBUS_SERVICE &&
err->level == VIR_ERR_ERROR &&
STREQ_NULLABLE("org.freedesktop.DBus.Error.UnknownMethod",
err->str1);
}
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