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, err;
do {
c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
err = errno;
} while (c < 0 && err == EINTR);
qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
close(s);
DPRINTF("accepted migration\n");
if (c < 0) {
error_report("could not accept migration connection (%s)",
strerror(err));
return;
}
f = qemu_fopen_socket(c, "rb");
if (f == NULL) {
error_report("could not qemu_fopen socket");
goto out;
}
process_incoming_migration(f);
return;
out:
close(c);
}
static void tcp_accept_incoming_migration(void *opaque)
{
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
int s = (unsigned long)opaque;
QEMUFile *f;
int c;
do {
c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
} while (c == -1 && socket_error() == EINTR);
DPRINTF("accepted migration\n");
if (c == -1) {
fprintf(stderr, "could not accept migration connection\n");
return;
}
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:
qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
close(s);
close(c);
}
static void unix_wait_for_connect(int fd, void *opaque)
{
MigrationState *s = opaque;
if (fd < 0) {
DPRINTF("migrate connect error\n");
s->file = NULL;
migrate_fd_error(s);
} else {
DPRINTF("migrate connect success\n");
s->file = qemu_fopen_socket(fd, "wb");
migrate_fd_connect(s);
}
}
static void tcp_accept_incoming_migration(void *opaque)
{
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
int s = (unsigned long)opaque;
QEMUFile *f;
int c, ret;
do {
c = accept(s, (struct sockaddr *)&addr, &addrlen);
} while (c == -1 && socket_error() == EINTR);
dprintf("accepted migration\n");
if (c == -1) {
fprintf(stderr, "could not accept migration connection\n");
return;
}
f = qemu_fopen_socket(c);
if (f == NULL) {
fprintf(stderr, "could not qemu_fopen socket\n");
goto out;
}
vm_stop(0); /* just in case */
ret = qemu_loadvm_state(f);
if (ret < 0) {
fprintf(stderr, "load of migration failed\n");
goto out_fopen;
}
qemu_announce_self();
dprintf("successfully loaded vm state\n");
/* we've successfully migrated, close the server socket */
qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
close(s);
vm_start();
out_fopen:
qemu_fclose(f);
out:
close(c);
}
static void tcp_accept_incoming_migration(void *opaque)
{
SockAddress addr;
int s = (unsigned long)opaque;
QEMUFile *f;
int c, ret;
c = socket_accept(s, &addr);
dprintf("accepted migration\n");
if (c == -1) {
fprintf(stderr, "could not accept migration connection\n");
return;
}
f = qemu_fopen_socket(c);
if (f == NULL) {
fprintf(stderr, "could not qemu_fopen socket\n");
goto out;
}
vm_stop(0); /* just in case */
ret = qemu_loadvm_state(f);
if (ret < 0) {
fprintf(stderr, "load of migration failed\n");
goto out_fopen;
}
qemu_announce_self();
dprintf("successfully loaded vm state\n");
/* we've successfully migrated, close the server socket */
qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
socket_close(s);
vm_start();
out_fopen:
qemu_fclose(f);
out:
socket_close(c);
}
/*
* Give a QEMUFile* off the same socket but data in the opposite
* direction.
*/
static QEMUFile *socket_dup_return_path(void *opaque)
{
QEMUFileSocket *qfs = opaque;
int revfd;
bool this_is_read;
QEMUFile *result;
if (qemu_file_get_error(qfs->file)) {
/* If the forward file is in error, don't try and open a return */
return NULL;
}
/* I don't think there's a better way to tell which direction 'this' is */
this_is_read = qfs->file->ops->get_buffer != NULL;
revfd = dup(qfs->fd);
if (revfd == -1) {
error_report("Error duplicating fd for return path: %s",
strerror(errno));
return NULL;
}
result = qemu_fopen_socket(revfd, this_is_read ? "wb" : "rb");
if (!result) {
close(revfd);
}
if (this_is_read) {
/* The qemu_fopen_socket "wb" will mark the socket blocking,
* which would be OK for the return path, but the semantics
* of non-blocking is that it follows the underlying connection
* not the fd number, and thus setting the return path non-blocking
* ends up setting the forward path blocking, which we don't want
*/
qemu_set_nonblock(revfd);
}
return result;
}
