[Qemu-devel] [PATCH 5/7] migration-local: implementation of incoming part

[Lei Li <lilei@linux.vnet.ibm.com>]

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
---
 include/migration/migration.h |    6 +++++
 migration-local.c             |   39 ++++++++++++++++++++++++++++++++++
 migration-unix.c              |   47 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+), 0 deletions(-)

diff --git a/include/migration/migration.h b/include/migration/migration.h
index 12c75cf..e0693c2 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -73,6 +73,10 @@ void process_incoming_migration(QEMUFile *f);
 
 void qemu_start_incoming_migration(const char *uri, Error **errp);
 
+void start_local_incoming_migration(QEMUFile *f);
+
+void qemu_start_local_incoming_migration(const char *uri, Error **errp);
+
 uint64_t migrate_max_downtime(void);
 
 void do_info_migrate_print(Monitor *mon, const QObject *data);
@@ -89,6 +93,8 @@ void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Erro
 
 void unix_start_incoming_migration(const char *path, Error **errp);
 
+void unix_start_local_incoming_migration(const char *path, Error **errp);
+
 void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp);
 
 void unix_start_local_outgoing_migration(LocalMigState *s, const char *path, Error **errp);
diff --git a/migration-local.c b/migration-local.c
index a97dd3a..61da76f 100644
--- a/migration-local.c
+++ b/migration-local.c
@@ -114,3 +114,42 @@ fail:
         vm_start();
     }
 }
+
+/**********************************************************************
+ * Incoming part
+ */
+
+void qemu_start_local_incoming_migration(const char *uri, Error **errp)
+{
+    const char *p;
+
+    if (strstart(uri, "unix:", &p)) {
+        unix_start_local_incoming_migration(p, errp);
+    } else {
+        error_setg(errp, "unknown migration protocol: %s", uri);
+    }
+}
+
+void start_local_incoming_migration(QEMUFile *f)
+{
+    int ret;
+
+    ret = qemu_loadvm_state(f);
+    if (ret < 0) {
+        fprintf(stderr, "load of migration failed\n");
+        exit(EXIT_FAILURE);
+    }
+    qemu_announce_self();
+
+    DPRINTF("successfully loaded vm state\n");
+
+    bdrv_clear_incoming_migration_all();
+    /* Make sure all file formats flush their mutable metadata */
+    bdrv_invalidate_cache_all();
+
+    if (autostart) {
+        vm_start();
+    } else {
+        runstate_set(RUN_STATE_PAUSED);
+    }
+}
diff --git a/migration-unix.c b/migration-unix.c
index a21262a..ba7c0d0 100644
--- a/migration-unix.c
+++ b/migration-unix.c
@@ -108,3 +108,50 @@ void unix_start_incoming_migration(const char *path, Error **errp)
     qemu_set_fd_handler2(s, NULL, unix_accept_incoming_migration, NULL,
                          (void *)(intptr_t)s);
 }
+
+static void unix_accept_local_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);
+    qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
+    close(s);
+
+    DPRINTF("accepted migration\n");
+
+    if (c == -1) {
+        fprintf(stderr, "could not accept migration connection\n");
+        goto out;
+    }
+
+    f = qemu_fopen_socket(c, "rb");
+    if (f == NULL) {
+        fprintf(stderr, "could not qemu_fopen socket\n");
+        goto out;
+    }
+
+    start_local_incoming_migration(f);
+    return;
+
+out:
+    close(c);
+}
+
+void unix_start_local_incoming_migration(const char *path, Error **errp)
+{
+    int ret;
+
+    ret = unix_listen(path, NULL, 0, errp);
+    if (ret < 0) {
+        return;
+    }
+
+    qemu_set_fd_handler2(ret, NULL, unix_accept_local_incoming_migration, NULL,
+                         (void *)(intptr_t)ret);
+}
-- 
1.7.7.6