Add qemu 2.4.0

[kvmfornfv.git] / qemu / migration / tcp.c

diff --git a/qemu/migration/tcp.c b/qemu/migration/tcp.c
new file mode 100644 (file)
index 0000000..ae89172
--- /dev/null
+++ b/qemu/migration/tcp.c
@@ -0,0 +1,103 @@
+/*
+ * 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 <string.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->file = NULL;
+        migrate_fd_error(s);
+    } else {
+        DPRINTF("migrate connect success\n");
+        s->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, err;
+
+    do {
+        c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
+        err = socket_error();
+    } while (c < 0 && err == 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(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:
+    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);
+}