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/*
* admin_remote.c
*
* Copyright (C) 2015 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/>.
*
* Author: Erik Skultety <eskultet@redhat.com>
*/
#include <config.h>
#include <rpc/rpc.h>
#include "admin_protocol.h"
typedef struct _remoteAdminPriv remoteAdminPriv;
typedef remoteAdminPriv *remoteAdminPrivPtr;
struct _remoteAdminPriv {
virObjectLockable parent;
int counter;
virNetClientPtr client;
virNetClientProgramPtr program;
};
static virClassPtr remoteAdminPrivClass;
static void
remoteAdminPrivDispose(void *opaque)
{
remoteAdminPrivPtr priv = opaque;
virObjectUnref(priv->program);
virObjectUnref(priv->client);
}
static int
callFull(virAdmConnectPtr conn ATTRIBUTE_UNUSED,
remoteAdminPrivPtr priv,
int *fdin,
size_t fdinlen,
int **fdout,
size_t *fdoutlen,
int proc_nr,
xdrproc_t args_filter, char *args,
xdrproc_t ret_filter, char *ret)
{
int rv;
virNetClientProgramPtr prog = priv->program;
int counter = priv->counter++;
virNetClientPtr client = priv->client;
/* Unlock, so that if we get any async events/stream data
* while processing the RPC, we don't deadlock when our
* callbacks for those are invoked
*/
virObjectRef(priv);
virObjectUnlock(priv);
rv = virNetClientProgramCall(prog,
client,
counter,
proc_nr,
fdinlen, fdin,
fdoutlen, fdout,
args_filter, args,
ret_filter, ret);
virObjectLock(priv);
virObjectUnref(priv);
return rv;
}
static int
call(virAdmConnectPtr conn,
unsigned int flags,
int proc_nr,
xdrproc_t args_filter, char *args,
xdrproc_t ret_filter, char *ret)
{
virCheckFlags(0, -1);
return callFull(conn, conn->privateData,
NULL, 0, NULL, NULL, proc_nr,
args_filter, args, ret_filter, ret);
}
#include "admin_client.h"
static void
remoteAdminClientCloseFunc(virNetClientPtr client ATTRIBUTE_UNUSED,
int reason,
void *opaque)
{
virAdmConnectCloseCallbackDataPtr cbdata = opaque;
virObjectLock(cbdata);
if (cbdata->callback) {
VIR_DEBUG("Triggering connection close callback %p reason=%d, opaque=%p",
cbdata->callback, reason, cbdata->opaque);
cbdata->callback(cbdata->conn, reason, cbdata->opaque);
if (cbdata->freeCallback)
cbdata->freeCallback(cbdata->opaque);
cbdata->callback = NULL;
cbdata->freeCallback = NULL;
}
virObjectUnlock(cbdata);
}
static int
remoteAdminConnectOpen(virAdmConnectPtr conn, unsigned int flags)
{
int rv = -1;
remoteAdminPrivPtr priv = conn->privateData;
admin_connect_open_args args;
virObjectLock(priv);
args.flags = flags;
if (virNetClientRegisterAsyncIO(priv->client) < 0) {
VIR_DEBUG("Failed to add event watch, disabling events and support for"
" keepalive messages");
virResetLastError();
}
virObjectRef(conn->closeCallback);
virNetClientSetCloseCallback(priv->client, remoteAdminClientCloseFunc,
conn->closeCallback,
virObjectFreeCallback);
if (call(conn, 0, ADMIN_PROC_CONNECT_OPEN,
(xdrproc_t)xdr_admin_connect_open_args, (char *)&args,
(xdrproc_t)xdr_void, (char *)NULL) == -1) {
goto done;
}
rv = 0;
done:
virObjectUnlock(priv);
return rv;
}
static int
remoteAdminConnectClose(virAdmConnectPtr conn)
{
int rv = -1;
remoteAdminPrivPtr priv = conn->privateData;
virObjectLock(priv);
if (call(conn, 0, ADMIN_PROC_CONNECT_CLOSE,
(xdrproc_t)xdr_void, (char *)NULL,
(xdrproc_t)xdr_void, (char *)NULL) == -1) {
goto done;
}
virNetClientSetCloseCallback(priv->client, NULL, NULL, NULL);
rv = 0;
done:
virObjectUnlock(priv);
return rv;
}
static void
remoteAdminPrivFree(void *opaque)
{
virAdmConnectPtr conn = opaque;
remoteAdminConnectClose(conn);
virObjectUnref(conn->privateData);
}
static remoteAdminPrivPtr
remoteAdminPrivNew(const char *sock_path)
{
remoteAdminPrivPtr priv = NULL;
if (!(priv = virObjectLockableNew(remoteAdminPrivClass)))
goto error;
if (!(priv->client = virNetClientNewUNIX(sock_path, false, NULL)))
goto error;
if (!(priv->program = virNetClientProgramNew(ADMIN_PROGRAM,
ADMIN_PROTOCOL_VERSION,
NULL, 0, NULL)))
goto error;
if (virNetClientAddProgram(priv->client, priv->program) < 0)
goto error;
return priv;
error:
virObjectUnref(priv);
return NULL;
}
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