mirror of
https://github.com/mii443/qemu.git
synced 2025-08-22 23:25:48 +00:00
68f9df5990
The fcntl(fd, F_SETFL, O_NONBLOCK) flag is not specific to sockets. Rename to qemu_set_nonblock() just like qemu_set_cloexec(). Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> (cherry picked from commit 399f1c8f8af1f6f8b18ef4e37169c6301264e467) Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Conflicts: block/sheepdog.c socket_set_block()/socket_set_nonblock() calls in different locations include/qemu/sockets.h socket_set_nodelay() does not exist in v1.4.0, messes up diff context qemu-char.c glib G_IO_IN events are not used in v1.4.0, messes up diff context savevm.c qemu_fopen_socket() only has read mode in v1.4.0, qemu_set_block() not necessary. slirp/misc.c unportable setsockopt() calls in v1.4.0 mess up diff context slirp/tcp_subr.c file was reformatted, diff context is messed up ui/vnc.c old dcl->idle instead of vd->dcl.idle messes up diff context Added: migration-tcp.c, migration-unix.c qemu_fopen_socket() write mode does not exist yet, qemu_set_block() call is needed here. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/*
|
|
* QEMU live migration
|
|
*
|
|
* Copyright IBM, Corp. 2008
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
|
|
#include "qemu-common.h"
|
|
#include "qemu/sockets.h"
|
|
#include "migration/migration.h"
|
|
#include "migration/qemu-file.h"
|
|
#include "block/block.h"
|
|
|
|
//#define DEBUG_MIGRATION_TCP
|
|
|
|
#ifdef DEBUG_MIGRATION_TCP
|
|
#define DPRINTF(fmt, ...) \
|
|
do { printf("migration-tcp: " fmt, ## __VA_ARGS__); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...) \
|
|
do { } while (0)
|
|
#endif
|
|
|
|
static int socket_errno(MigrationState *s)
|
|
{
|
|
return socket_error();
|
|
}
|
|
|
|
static int socket_write(MigrationState *s, const void * buf, size_t size)
|
|
{
|
|
return send(s->fd, buf, size, 0);
|
|
}
|
|
|
|
static int tcp_close(MigrationState *s)
|
|
{
|
|
int r = 0;
|
|
DPRINTF("tcp_close\n");
|
|
if (closesocket(s->fd) < 0) {
|
|
r = -socket_error();
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void tcp_wait_for_connect(int fd, void *opaque)
|
|
{
|
|
MigrationState *s = opaque;
|
|
|
|
if (fd < 0) {
|
|
DPRINTF("migrate connect error\n");
|
|
s->fd = -1;
|
|
migrate_fd_error(s);
|
|
} else {
|
|
DPRINTF("migrate connect success\n");
|
|
s->fd = fd;
|
|
qemu_set_block(s->fd);
|
|
migrate_fd_connect(s);
|
|
}
|
|
}
|
|
|
|
void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp)
|
|
{
|
|
s->get_error = socket_errno;
|
|
s->write = socket_write;
|
|
s->close = tcp_close;
|
|
|
|
s->fd = inet_nonblocking_connect(host_port, tcp_wait_for_connect, s, errp);
|
|
}
|
|
|
|
static void tcp_accept_incoming_migration(void *opaque)
|
|
{
|
|
struct sockaddr_in addr;
|
|
socklen_t addrlen = sizeof(addr);
|
|
int s = (intptr_t)opaque;
|
|
QEMUFile *f;
|
|
int c;
|
|
|
|
do {
|
|
c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
|
|
} while (c == -1 && socket_error() == EINTR);
|
|
qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
|
|
closesocket(s);
|
|
|
|
DPRINTF("accepted migration\n");
|
|
|
|
if (c == -1) {
|
|
fprintf(stderr, "could not accept migration connection\n");
|
|
goto out;
|
|
}
|
|
|
|
f = qemu_fopen_socket(c);
|
|
if (f == NULL) {
|
|
fprintf(stderr, "could not qemu_fopen socket\n");
|
|
goto out;
|
|
}
|
|
|
|
process_incoming_migration(f);
|
|
return;
|
|
|
|
out:
|
|
closesocket(c);
|
|
}
|
|
|
|
void tcp_start_incoming_migration(const char *host_port, Error **errp)
|
|
{
|
|
int s;
|
|
|
|
s = inet_listen(host_port, NULL, 256, SOCK_STREAM, 0, errp);
|
|
if (s < 0) {
|
|
return;
|
|
}
|
|
|
|
qemu_set_fd_handler2(s, NULL, tcp_accept_incoming_migration, NULL,
|
|
(void *)(intptr_t)s);
|
|
}
|