qemu/io/channel-socket.c
Marc-André Lureau 25657fc6c1 win32: replace closesocket() with close() wrapper
Use a close() wrapper instead, so that we don't need to worry about
closesocket() vs close() anymore, let's hope.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-17-marcandre.lureau@redhat.com>
2023-03-13 15:39:31 +04:00

949 lines
27 KiB
C

/*
* QEMU I/O channels sockets driver
*
* 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/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qapi-visit-sockets.h"
#include "qemu/module.h"
#include "io/channel-socket.h"
#include "io/channel-watch.h"
#include "trace.h"
#include "qapi/clone-visitor.h"
#ifdef CONFIG_LINUX
#include <linux/errqueue.h>
#include <sys/socket.h>
#if (defined(MSG_ZEROCOPY) && defined(SO_ZEROCOPY))
#define QEMU_MSG_ZEROCOPY
#endif
#endif
#define SOCKET_MAX_FDS 16
SocketAddress *
qio_channel_socket_get_local_address(QIOChannelSocket *ioc,
Error **errp)
{
return socket_sockaddr_to_address(&ioc->localAddr,
ioc->localAddrLen,
errp);
}
SocketAddress *
qio_channel_socket_get_remote_address(QIOChannelSocket *ioc,
Error **errp)
{
return socket_sockaddr_to_address(&ioc->remoteAddr,
ioc->remoteAddrLen,
errp);
}
QIOChannelSocket *
qio_channel_socket_new(void)
{
QIOChannelSocket *sioc;
QIOChannel *ioc;
sioc = QIO_CHANNEL_SOCKET(object_new(TYPE_QIO_CHANNEL_SOCKET));
sioc->fd = -1;
sioc->zero_copy_queued = 0;
sioc->zero_copy_sent = 0;
ioc = QIO_CHANNEL(sioc);
qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_SHUTDOWN);
#ifdef WIN32
ioc->event = CreateEvent(NULL, FALSE, FALSE, NULL);
#endif
trace_qio_channel_socket_new(sioc);
return sioc;
}
static int
qio_channel_socket_set_fd(QIOChannelSocket *sioc,
int fd,
Error **errp)
{
if (sioc->fd != -1) {
error_setg(errp, "Socket is already open");
return -1;
}
sioc->fd = fd;
sioc->remoteAddrLen = sizeof(sioc->remoteAddr);
sioc->localAddrLen = sizeof(sioc->localAddr);
if (getpeername(fd, (struct sockaddr *)&sioc->remoteAddr,
&sioc->remoteAddrLen) < 0) {
if (errno == ENOTCONN) {
memset(&sioc->remoteAddr, 0, sizeof(sioc->remoteAddr));
sioc->remoteAddrLen = sizeof(sioc->remoteAddr);
} else {
error_setg_errno(errp, errno,
"Unable to query remote socket address");
goto error;
}
}
if (getsockname(fd, (struct sockaddr *)&sioc->localAddr,
&sioc->localAddrLen) < 0) {
error_setg_errno(errp, errno,
"Unable to query local socket address");
goto error;
}
#ifndef WIN32
if (sioc->localAddr.ss_family == AF_UNIX) {
QIOChannel *ioc = QIO_CHANNEL(sioc);
qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_FD_PASS);
}
#endif /* WIN32 */
return 0;
error:
sioc->fd = -1; /* Let the caller close FD on failure */
return -1;
}
QIOChannelSocket *
qio_channel_socket_new_fd(int fd,
Error **errp)
{
QIOChannelSocket *ioc;
ioc = qio_channel_socket_new();
if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
object_unref(OBJECT(ioc));
return NULL;
}
trace_qio_channel_socket_new_fd(ioc, fd);
return ioc;
}
int qio_channel_socket_connect_sync(QIOChannelSocket *ioc,
SocketAddress *addr,
Error **errp)
{
int fd;
trace_qio_channel_socket_connect_sync(ioc, addr);
fd = socket_connect(addr, errp);
if (fd < 0) {
trace_qio_channel_socket_connect_fail(ioc);
return -1;
}
trace_qio_channel_socket_connect_complete(ioc, fd);
if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
close(fd);
return -1;
}
#ifdef QEMU_MSG_ZEROCOPY
int ret, v = 1;
ret = setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, &v, sizeof(v));
if (ret == 0) {
/* Zero copy available on host */
qio_channel_set_feature(QIO_CHANNEL(ioc),
QIO_CHANNEL_FEATURE_WRITE_ZERO_COPY);
}
#endif
qio_channel_set_feature(QIO_CHANNEL(ioc),
QIO_CHANNEL_FEATURE_READ_MSG_PEEK);
return 0;
}
static void qio_channel_socket_connect_worker(QIOTask *task,
gpointer opaque)
{
QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
SocketAddress *addr = opaque;
Error *err = NULL;
qio_channel_socket_connect_sync(ioc, addr, &err);
qio_task_set_error(task, err);
}
void qio_channel_socket_connect_async(QIOChannelSocket *ioc,
SocketAddress *addr,
QIOTaskFunc callback,
gpointer opaque,
GDestroyNotify destroy,
GMainContext *context)
{
QIOTask *task = qio_task_new(
OBJECT(ioc), callback, opaque, destroy);
SocketAddress *addrCopy;
addrCopy = QAPI_CLONE(SocketAddress, addr);
/* socket_connect() does a non-blocking connect(), but it
* still blocks in DNS lookups, so we must use a thread */
trace_qio_channel_socket_connect_async(ioc, addr);
qio_task_run_in_thread(task,
qio_channel_socket_connect_worker,
addrCopy,
(GDestroyNotify)qapi_free_SocketAddress,
context);
}
int qio_channel_socket_listen_sync(QIOChannelSocket *ioc,
SocketAddress *addr,
int num,
Error **errp)
{
int fd;
trace_qio_channel_socket_listen_sync(ioc, addr, num);
fd = socket_listen(addr, num, errp);
if (fd < 0) {
trace_qio_channel_socket_listen_fail(ioc);
return -1;
}
trace_qio_channel_socket_listen_complete(ioc, fd);
if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
close(fd);
return -1;
}
qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_LISTEN);
return 0;
}
struct QIOChannelListenWorkerData {
SocketAddress *addr;
int num; /* amount of expected connections */
};
static void qio_channel_listen_worker_free(gpointer opaque)
{
struct QIOChannelListenWorkerData *data = opaque;
qapi_free_SocketAddress(data->addr);
g_free(data);
}
static void qio_channel_socket_listen_worker(QIOTask *task,
gpointer opaque)
{
QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
struct QIOChannelListenWorkerData *data = opaque;
Error *err = NULL;
qio_channel_socket_listen_sync(ioc, data->addr, data->num, &err);
qio_task_set_error(task, err);
}
void qio_channel_socket_listen_async(QIOChannelSocket *ioc,
SocketAddress *addr,
int num,
QIOTaskFunc callback,
gpointer opaque,
GDestroyNotify destroy,
GMainContext *context)
{
QIOTask *task = qio_task_new(
OBJECT(ioc), callback, opaque, destroy);
struct QIOChannelListenWorkerData *data;
data = g_new0(struct QIOChannelListenWorkerData, 1);
data->addr = QAPI_CLONE(SocketAddress, addr);
data->num = num;
/* socket_listen() blocks in DNS lookups, so we must use a thread */
trace_qio_channel_socket_listen_async(ioc, addr, num);
qio_task_run_in_thread(task,
qio_channel_socket_listen_worker,
data,
qio_channel_listen_worker_free,
context);
}
int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc,
SocketAddress *localAddr,
SocketAddress *remoteAddr,
Error **errp)
{
int fd;
trace_qio_channel_socket_dgram_sync(ioc, localAddr, remoteAddr);
fd = socket_dgram(remoteAddr, localAddr, errp);
if (fd < 0) {
trace_qio_channel_socket_dgram_fail(ioc);
return -1;
}
trace_qio_channel_socket_dgram_complete(ioc, fd);
if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
close(fd);
return -1;
}
return 0;
}
struct QIOChannelSocketDGramWorkerData {
SocketAddress *localAddr;
SocketAddress *remoteAddr;
};
static void qio_channel_socket_dgram_worker_free(gpointer opaque)
{
struct QIOChannelSocketDGramWorkerData *data = opaque;
qapi_free_SocketAddress(data->localAddr);
qapi_free_SocketAddress(data->remoteAddr);
g_free(data);
}
static void qio_channel_socket_dgram_worker(QIOTask *task,
gpointer opaque)
{
QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
struct QIOChannelSocketDGramWorkerData *data = opaque;
Error *err = NULL;
/* socket_dgram() blocks in DNS lookups, so we must use a thread */
qio_channel_socket_dgram_sync(ioc, data->localAddr,
data->remoteAddr, &err);
qio_task_set_error(task, err);
}
void qio_channel_socket_dgram_async(QIOChannelSocket *ioc,
SocketAddress *localAddr,
SocketAddress *remoteAddr,
QIOTaskFunc callback,
gpointer opaque,
GDestroyNotify destroy,
GMainContext *context)
{
QIOTask *task = qio_task_new(
OBJECT(ioc), callback, opaque, destroy);
struct QIOChannelSocketDGramWorkerData *data = g_new0(
struct QIOChannelSocketDGramWorkerData, 1);
data->localAddr = QAPI_CLONE(SocketAddress, localAddr);
data->remoteAddr = QAPI_CLONE(SocketAddress, remoteAddr);
trace_qio_channel_socket_dgram_async(ioc, localAddr, remoteAddr);
qio_task_run_in_thread(task,
qio_channel_socket_dgram_worker,
data,
qio_channel_socket_dgram_worker_free,
context);
}
QIOChannelSocket *
qio_channel_socket_accept(QIOChannelSocket *ioc,
Error **errp)
{
QIOChannelSocket *cioc;
cioc = qio_channel_socket_new();
cioc->remoteAddrLen = sizeof(ioc->remoteAddr);
cioc->localAddrLen = sizeof(ioc->localAddr);
retry:
trace_qio_channel_socket_accept(ioc);
cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr,
&cioc->remoteAddrLen);
if (cioc->fd < 0) {
if (errno == EINTR) {
goto retry;
}
error_setg_errno(errp, errno, "Unable to accept connection");
trace_qio_channel_socket_accept_fail(ioc);
goto error;
}
if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr,
&cioc->localAddrLen) < 0) {
error_setg_errno(errp, errno,
"Unable to query local socket address");
goto error;
}
#ifndef WIN32
if (cioc->localAddr.ss_family == AF_UNIX) {
QIOChannel *ioc_local = QIO_CHANNEL(cioc);
qio_channel_set_feature(ioc_local, QIO_CHANNEL_FEATURE_FD_PASS);
}
#endif /* WIN32 */
qio_channel_set_feature(QIO_CHANNEL(cioc),
QIO_CHANNEL_FEATURE_READ_MSG_PEEK);
trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd);
return cioc;
error:
object_unref(OBJECT(cioc));
return NULL;
}
static void qio_channel_socket_init(Object *obj)
{
QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
ioc->fd = -1;
}
static void qio_channel_socket_finalize(Object *obj)
{
QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
if (ioc->fd != -1) {
QIOChannel *ioc_local = QIO_CHANNEL(ioc);
if (qio_channel_has_feature(ioc_local, QIO_CHANNEL_FEATURE_LISTEN)) {
Error *err = NULL;
socket_listen_cleanup(ioc->fd, &err);
if (err) {
error_report_err(err);
err = NULL;
}
}
#ifdef WIN32
qemu_socket_unselect(ioc->fd, NULL);
#endif
close(ioc->fd);
ioc->fd = -1;
}
}
#ifndef WIN32
static void qio_channel_socket_copy_fds(struct msghdr *msg,
int **fds, size_t *nfds)
{
struct cmsghdr *cmsg;
*nfds = 0;
*fds = NULL;
for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
int fd_size, i;
int gotfds;
if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
cmsg->cmsg_level != SOL_SOCKET ||
cmsg->cmsg_type != SCM_RIGHTS) {
continue;
}
fd_size = cmsg->cmsg_len - CMSG_LEN(0);
if (!fd_size) {
continue;
}
gotfds = fd_size / sizeof(int);
*fds = g_renew(int, *fds, *nfds + gotfds);
memcpy(*fds + *nfds, CMSG_DATA(cmsg), fd_size);
for (i = 0; i < gotfds; i++) {
int fd = (*fds)[*nfds + i];
if (fd < 0) {
continue;
}
/* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
qemu_socket_set_block(fd);
#ifndef MSG_CMSG_CLOEXEC
qemu_set_cloexec(fd);
#endif
}
*nfds += gotfds;
}
}
static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
int **fds,
size_t *nfds,
int flags,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
ssize_t ret;
struct msghdr msg = { NULL, };
char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
int sflags = 0;
memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
msg.msg_iov = (struct iovec *)iov;
msg.msg_iovlen = niov;
if (fds && nfds) {
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
#ifdef MSG_CMSG_CLOEXEC
sflags |= MSG_CMSG_CLOEXEC;
#endif
}
if (flags & QIO_CHANNEL_READ_FLAG_MSG_PEEK) {
sflags |= MSG_PEEK;
}
retry:
ret = recvmsg(sioc->fd, &msg, sflags);
if (ret < 0) {
if (errno == EAGAIN) {
return QIO_CHANNEL_ERR_BLOCK;
}
if (errno == EINTR) {
goto retry;
}
error_setg_errno(errp, errno,
"Unable to read from socket");
return -1;
}
if (fds && nfds) {
qio_channel_socket_copy_fds(&msg, fds, nfds);
}
return ret;
}
static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
int *fds,
size_t nfds,
int flags,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
ssize_t ret;
struct msghdr msg = { NULL, };
char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
size_t fdsize = sizeof(int) * nfds;
struct cmsghdr *cmsg;
int sflags = 0;
memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
msg.msg_iov = (struct iovec *)iov;
msg.msg_iovlen = niov;
if (nfds) {
if (nfds > SOCKET_MAX_FDS) {
error_setg_errno(errp, EINVAL,
"Only %d FDs can be sent, got %zu",
SOCKET_MAX_FDS, nfds);
return -1;
}
msg.msg_control = control;
msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfds);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_len = CMSG_LEN(fdsize);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
memcpy(CMSG_DATA(cmsg), fds, fdsize);
}
if (flags & QIO_CHANNEL_WRITE_FLAG_ZERO_COPY) {
#ifdef QEMU_MSG_ZEROCOPY
sflags = MSG_ZEROCOPY;
#else
/*
* We expect QIOChannel class entry point to have
* blocked this code path already
*/
g_assert_not_reached();
#endif
}
retry:
ret = sendmsg(sioc->fd, &msg, sflags);
if (ret <= 0) {
switch (errno) {
case EAGAIN:
return QIO_CHANNEL_ERR_BLOCK;
case EINTR:
goto retry;
case ENOBUFS:
if (flags & QIO_CHANNEL_WRITE_FLAG_ZERO_COPY) {
error_setg_errno(errp, errno,
"Process can't lock enough memory for using MSG_ZEROCOPY");
return -1;
}
break;
}
error_setg_errno(errp, errno,
"Unable to write to socket");
return -1;
}
if (flags & QIO_CHANNEL_WRITE_FLAG_ZERO_COPY) {
sioc->zero_copy_queued++;
}
return ret;
}
#else /* WIN32 */
static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
int **fds,
size_t *nfds,
int flags,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
ssize_t done = 0;
ssize_t i;
int sflags = 0;
if (flags & QIO_CHANNEL_READ_FLAG_MSG_PEEK) {
sflags |= MSG_PEEK;
}
for (i = 0; i < niov; i++) {
ssize_t ret;
retry:
ret = recv(sioc->fd,
iov[i].iov_base,
iov[i].iov_len,
sflags);
if (ret < 0) {
if (errno == EAGAIN) {
if (done) {
return done;
} else {
return QIO_CHANNEL_ERR_BLOCK;
}
} else if (errno == EINTR) {
goto retry;
} else {
error_setg_errno(errp, errno,
"Unable to read from socket");
return -1;
}
}
done += ret;
if (ret < iov[i].iov_len) {
return done;
}
}
return done;
}
static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
int *fds,
size_t nfds,
int flags,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
ssize_t done = 0;
ssize_t i;
for (i = 0; i < niov; i++) {
ssize_t ret;
retry:
ret = send(sioc->fd,
iov[i].iov_base,
iov[i].iov_len,
0);
if (ret < 0) {
if (errno == EAGAIN) {
if (done) {
return done;
} else {
return QIO_CHANNEL_ERR_BLOCK;
}
} else if (errno == EINTR) {
goto retry;
} else {
error_setg_errno(errp, errno,
"Unable to write to socket");
return -1;
}
}
done += ret;
if (ret < iov[i].iov_len) {
return done;
}
}
return done;
}
#endif /* WIN32 */
#ifdef QEMU_MSG_ZEROCOPY
static int qio_channel_socket_flush(QIOChannel *ioc,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
struct msghdr msg = {};
struct sock_extended_err *serr;
struct cmsghdr *cm;
char control[CMSG_SPACE(sizeof(*serr))];
int received;
int ret;
if (sioc->zero_copy_queued == sioc->zero_copy_sent) {
return 0;
}
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
memset(control, 0, sizeof(control));
ret = 1;
while (sioc->zero_copy_sent < sioc->zero_copy_queued) {
received = recvmsg(sioc->fd, &msg, MSG_ERRQUEUE);
if (received < 0) {
switch (errno) {
case EAGAIN:
/* Nothing on errqueue, wait until something is available */
qio_channel_wait(ioc, G_IO_ERR);
continue;
case EINTR:
continue;
default:
error_setg_errno(errp, errno,
"Unable to read errqueue");
return -1;
}
}
cm = CMSG_FIRSTHDR(&msg);
if (cm->cmsg_level != SOL_IP && cm->cmsg_type != IP_RECVERR &&
cm->cmsg_level != SOL_IPV6 && cm->cmsg_type != IPV6_RECVERR) {
error_setg_errno(errp, EPROTOTYPE,
"Wrong cmsg in errqueue");
return -1;
}
serr = (void *) CMSG_DATA(cm);
if (serr->ee_errno != SO_EE_ORIGIN_NONE) {
error_setg_errno(errp, serr->ee_errno,
"Error on socket");
return -1;
}
if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY) {
error_setg_errno(errp, serr->ee_origin,
"Error not from zero copy");
return -1;
}
/* No errors, count successfully finished sendmsg()*/
sioc->zero_copy_sent += serr->ee_data - serr->ee_info + 1;
/* If any sendmsg() succeeded using zero copy, return 0 at the end */
if (serr->ee_code != SO_EE_CODE_ZEROCOPY_COPIED) {
ret = 0;
}
}
return ret;
}
#endif /* QEMU_MSG_ZEROCOPY */
static int
qio_channel_socket_set_blocking(QIOChannel *ioc,
bool enabled,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
if (enabled) {
qemu_socket_set_block(sioc->fd);
} else {
qemu_socket_set_nonblock(sioc->fd);
}
return 0;
}
static void
qio_channel_socket_set_delay(QIOChannel *ioc,
bool enabled)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
int v = enabled ? 0 : 1;
setsockopt(sioc->fd,
IPPROTO_TCP, TCP_NODELAY,
&v, sizeof(v));
}
static void
qio_channel_socket_set_cork(QIOChannel *ioc,
bool enabled)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
int v = enabled ? 1 : 0;
socket_set_cork(sioc->fd, v);
}
static int
qio_channel_socket_close(QIOChannel *ioc,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
int rc = 0;
Error *err = NULL;
if (sioc->fd != -1) {
#ifdef WIN32
qemu_socket_unselect(sioc->fd, NULL);
#endif
if (qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_LISTEN)) {
socket_listen_cleanup(sioc->fd, errp);
}
if (close(sioc->fd) < 0) {
sioc->fd = -1;
error_setg_errno(&err, errno, "Unable to close socket");
error_propagate(errp, err);
return -1;
}
sioc->fd = -1;
}
return rc;
}
static int
qio_channel_socket_shutdown(QIOChannel *ioc,
QIOChannelShutdown how,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
int sockhow;
switch (how) {
case QIO_CHANNEL_SHUTDOWN_READ:
sockhow = SHUT_RD;
break;
case QIO_CHANNEL_SHUTDOWN_WRITE:
sockhow = SHUT_WR;
break;
case QIO_CHANNEL_SHUTDOWN_BOTH:
default:
sockhow = SHUT_RDWR;
break;
}
if (shutdown(sioc->fd, sockhow) < 0) {
error_setg_errno(errp, errno,
"Unable to shutdown socket");
return -1;
}
return 0;
}
static void qio_channel_socket_set_aio_fd_handler(QIOChannel *ioc,
AioContext *ctx,
IOHandler *io_read,
IOHandler *io_write,
void *opaque)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
aio_set_fd_handler(ctx, sioc->fd, false,
io_read, io_write, NULL, NULL, opaque);
}
static GSource *qio_channel_socket_create_watch(QIOChannel *ioc,
GIOCondition condition)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
return qio_channel_create_socket_watch(ioc,
sioc->fd,
condition);
}
static void qio_channel_socket_class_init(ObjectClass *klass,
void *class_data G_GNUC_UNUSED)
{
QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
ioc_klass->io_writev = qio_channel_socket_writev;
ioc_klass->io_readv = qio_channel_socket_readv;
ioc_klass->io_set_blocking = qio_channel_socket_set_blocking;
ioc_klass->io_close = qio_channel_socket_close;
ioc_klass->io_shutdown = qio_channel_socket_shutdown;
ioc_klass->io_set_cork = qio_channel_socket_set_cork;
ioc_klass->io_set_delay = qio_channel_socket_set_delay;
ioc_klass->io_create_watch = qio_channel_socket_create_watch;
ioc_klass->io_set_aio_fd_handler = qio_channel_socket_set_aio_fd_handler;
#ifdef QEMU_MSG_ZEROCOPY
ioc_klass->io_flush = qio_channel_socket_flush;
#endif
}
static const TypeInfo qio_channel_socket_info = {
.parent = TYPE_QIO_CHANNEL,
.name = TYPE_QIO_CHANNEL_SOCKET,
.instance_size = sizeof(QIOChannelSocket),
.instance_init = qio_channel_socket_init,
.instance_finalize = qio_channel_socket_finalize,
.class_init = qio_channel_socket_class_init,
};
static void qio_channel_socket_register_types(void)
{
type_register_static(&qio_channel_socket_info);
}
type_init(qio_channel_socket_register_types);