mirror of
https://gitlab.com/qemu-project/qemu.git
synced 2024-10-12 13:21:55 +03:00
95fa0c79a0
The function qio_channel_get_peercred() returns a pointer to the credentials of the peer process connected to this socket. This credentials structure is defined in <sys/socket.h> as follows: struct ucred { pid_t pid; /* Process ID of the sending process */ uid_t uid; /* User ID of the sending process */ gid_t gid; /* Group ID of the sending process */ }; The use of this function is possible only for connected AF_UNIX stream sockets and for AF_UNIX stream and datagram socket pairs. On platform other than Linux, the function return 0. Signed-off-by: Anthony Harivel <aharivel@redhat.com> Link: https://lore.kernel.org/r/20240522153453.1230389-2-aharivel@redhat.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
986 lines
28 KiB
C
986 lines
28 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-util.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;
|
|
}
|
|
if (serr->ee_data < serr->ee_info) {
|
|
error_setg_errno(errp, serr->ee_origin,
|
|
"Wrong notification bounds");
|
|
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_get_peerpid(QIOChannel *ioc,
|
|
unsigned int *pid,
|
|
Error **errp)
|
|
{
|
|
#ifdef CONFIG_LINUX
|
|
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
|
|
Error *err = NULL;
|
|
socklen_t len = sizeof(struct ucred);
|
|
|
|
struct ucred cred;
|
|
if (getsockopt(sioc->fd,
|
|
SOL_SOCKET, SO_PEERCRED,
|
|
&cred, &len) == -1) {
|
|
error_setg_errno(&err, errno, "Unable to get peer credentials");
|
|
error_propagate(errp, err);
|
|
*pid = -1;
|
|
return -1;
|
|
}
|
|
*pid = (unsigned int)cred.pid;
|
|
return 0;
|
|
#else
|
|
error_setg(errp, "Unsupported feature");
|
|
*pid = -1;
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
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 *read_ctx,
|
|
IOHandler *io_read,
|
|
AioContext *write_ctx,
|
|
IOHandler *io_write,
|
|
void *opaque)
|
|
{
|
|
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
|
|
|
|
qio_channel_util_set_aio_fd_handler(sioc->fd, read_ctx, io_read,
|
|
sioc->fd, write_ctx, io_write,
|
|
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
|
|
ioc_klass->io_peerpid = qio_channel_socket_get_peerpid;
|
|
}
|
|
|
|
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);
|