Migration via unix sockets.

Implement migration via unix sockets.  While you can fake this using
exec and netcat, this involves forking another process and is
generally not very nice.  By doing this directly in qemu, we can avoid
the copy through the external nc command.  This is useful for
implementations (such as libvirt) that want to do "secure" migration;
we pipe the data on the sending side into the unix socket, libvirt
picks it up, encrypts it, and transports it, and then on the remote
side libvirt decrypts it, dumps it to another unix socket, and
feeds it into qemu.

The implementation is straightforward and looks very similar to
migration-exec.c and migration-tcp.c

Signed-off-by: Chris Lalancette <clalance@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/migration.h b/migration.h
index 37c7f8e..0ed1fcb 100644
--- a/migration.h
+++ b/migration.h
@@ -73,6 +73,12 @@ MigrationState *tcp_start_outgoing_migration(const char *host_port,
 					     int64_t bandwidth_limit,
 					     int detach);
 
+int unix_start_incoming_migration(const char *path);
+
+MigrationState *unix_start_outgoing_migration(const char *path,
+					      int64_t bandwidth_limit,
+					      int detach);
+
 void migrate_fd_monitor_suspend(FdMigrationState *s);
 
 void migrate_fd_error(FdMigrationState *s);