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migration: convert tcp socket protocol to use QIOChannel 

Drop the current TCP socket migration driver and extend
the new generic socket driver to cope with the TCP address
format

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1461751518-12128-15-git-send-email-berrange@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-04-27 11:05:04 +01:00 committed by Amit Shah
parent 6f860ae755
commit e65c67e4da
3 changed files with 32 additions and 103 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
migration/Makefile.objs
View File

@ -1,4 +1,4 @@
common-obj-y += migration.o tcp.o socket.o
common-obj-y += migration.o socket.o
common-obj-y += vmstate.o
common-obj-y += qemu-file.o qemu-file-buf.o qemu-file-unix.o qemu-file-stdio.o
common-obj-y += qemu-file-channel.o

31
migration/socket.c
View File

@ -25,6 +25,23 @@
#include "trace.h"
static SocketAddress *tcp_build_address(const char *host_port, Error **errp)
{
InetSocketAddress *iaddr = inet_parse(host_port, errp);
SocketAddress *saddr;
if (!iaddr) {
return NULL;
}
saddr = g_new0(SocketAddress, 1);
saddr->type = SOCKET_ADDRESS_KIND_INET;
saddr->u.inet.data = iaddr;
return saddr;
}
static SocketAddress *unix_build_address(const char *path)
{
SocketAddress *saddr;
@ -69,6 +86,14 @@ static void socket_start_outgoing_migration(MigrationState *s,
qapi_free_SocketAddress(saddr);
}
void tcp_start_outgoing_migration(MigrationState *s,
const char *host_port,
Error **errp)
{
SocketAddress *saddr = tcp_build_address(host_port, errp);
socket_start_outgoing_migration(s, saddr, errp);
}
void unix_start_outgoing_migration(MigrationState *s,
const char *path,
Error **errp)
@ -125,6 +150,12 @@ static void socket_start_incoming_migration(SocketAddress *saddr,
qapi_free_SocketAddress(saddr);
}
void tcp_start_incoming_migration(const char *host_port, Error **errp)
{
SocketAddress *saddr = tcp_build_address(host_port, errp);
socket_start_incoming_migration(saddr, errp);
}
void unix_start_incoming_migration(const char *path, Error **errp)
{
SocketAddress *saddr = unix_build_address(path);

102
migration/tcp.c
View File

@ -1,102 +0,0 @@
/*
* 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/osdep.h"
#include "qemu-common.h"
#include "qemu/error-report.h"
#include "qemu/sockets.h"
#include "migration/migration.h"
#include "migration/qemu-file.h"
#include "block/block.h"
#include "qemu/main-loop.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 void tcp_wait_for_connect(int fd, Error *err, void *opaque)
{
MigrationState *s = opaque;
if (fd < 0) {
DPRINTF("migrate connect error: %s\n", error_get_pretty(err));
s->to_dst_file = NULL;
migrate_fd_error(s, err);
} else {
DPRINTF("migrate connect success\n");
s->to_dst_file = qemu_fopen_socket(fd, "wb");
migrate_fd_connect(s);
}
}
void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp)
{
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 < 0 && errno == EINTR);
qemu_set_fd_handler(s, NULL, NULL, NULL);
closesocket(s);
DPRINTF("accepted migration\n");
if (c < 0) {
error_report("could not accept migration connection (%s)",
strerror(errno));
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:
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_handler(s, tcp_accept_incoming_migration, NULL,
(void *)(intptr_t)s);
}