43eaae28e0
And remove the superfluous integer return value. Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
126 lines
2.7 KiB
C
126 lines
2.7 KiB
C
/*
|
|
* QEMU live migration via Unix Domain Sockets
|
|
*
|
|
* Copyright Red Hat, Inc. 2009
|
|
*
|
|
* Authors:
|
|
* Chris Lalancette <clalance@redhat.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_socket.h"
|
|
#include "migration.h"
|
|
#include "qemu-char.h"
|
|
#include "buffered_file.h"
|
|
#include "block.h"
|
|
|
|
//#define DEBUG_MIGRATION_UNIX
|
|
|
|
#ifdef DEBUG_MIGRATION_UNIX
|
|
#define DPRINTF(fmt, ...) \
|
|
do { printf("migration-unix: " fmt, ## __VA_ARGS__); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...) \
|
|
do { } while (0)
|
|
#endif
|
|
|
|
static int unix_errno(MigrationState *s)
|
|
{
|
|
return errno;
|
|
}
|
|
|
|
static int unix_write(MigrationState *s, const void * buf, size_t size)
|
|
{
|
|
return write(s->fd, buf, size);
|
|
}
|
|
|
|
static int unix_close(MigrationState *s)
|
|
{
|
|
int r = 0;
|
|
DPRINTF("unix_close\n");
|
|
if (s->fd != -1) {
|
|
if (close(s->fd) < 0) {
|
|
r = -errno;
|
|
}
|
|
s->fd = -1;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void unix_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;
|
|
migrate_fd_connect(s);
|
|
}
|
|
}
|
|
|
|
void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp)
|
|
{
|
|
s->get_error = unix_errno;
|
|
s->write = unix_write;
|
|
s->close = unix_close;
|
|
|
|
s->fd = unix_nonblocking_connect(path, unix_wait_for_connect, s, errp);
|
|
}
|
|
|
|
static void unix_accept_incoming_migration(void *opaque)
|
|
{
|
|
struct sockaddr_un 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 && errno == EINTR);
|
|
|
|
DPRINTF("accepted migration\n");
|
|
|
|
if (c == -1) {
|
|
fprintf(stderr, "could not accept migration connection\n");
|
|
goto out2;
|
|
}
|
|
|
|
f = qemu_fopen_socket(c);
|
|
if (f == NULL) {
|
|
fprintf(stderr, "could not qemu_fopen socket\n");
|
|
goto out;
|
|
}
|
|
|
|
process_incoming_migration(f);
|
|
qemu_fclose(f);
|
|
out:
|
|
close(c);
|
|
out2:
|
|
qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
|
|
close(s);
|
|
}
|
|
|
|
void unix_start_incoming_migration(const char *path, Error **errp)
|
|
{
|
|
int s;
|
|
|
|
s = unix_listen(path, NULL, 0, errp);
|
|
if (s < 0) {
|
|
return;
|
|
}
|
|
|
|
qemu_set_fd_handler2(s, NULL, unix_accept_incoming_migration, NULL,
|
|
(void *)(intptr_t)s);
|
|
}
|