Open 2.0 development tree

[qemu.git] / migration-unix.c

diff --git a/migration-unix.c b/migration-unix.c
index f979b5fb9d025ec9c4e923f1ad5fd854f8ff30c7..651fc5b707d7441b7094ec31b69e44581219107a 100644 (file)
--- a/migration-unix.c
+++ b/migration-unix.c
@@ -9,14 +9,16 @@
  * 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-common.h"
-#include "qemu_socket.h"
-#include "migration.h"
-#include "qemu-char.h"
-#include "buffered_file.h"
-#include "block.h"
+#include "qemu/sockets.h"
+#include "qemu/main-loop.h"
+#include "migration/migration.h"
+#include "migration/qemu-file.h"
+#include "block/block.h"
 
 //#define DEBUG_MIGRATION_UNIX
 
@@ -28,89 +30,24 @@
     do { } while (0)
 #endif
 
-static int unix_errno(MigrationState *s)
-{
-    return errno;
-}
-
-static int unix_write(MigrationState *s, const void * buf, size_t size)
-{
-    return write(s->fd, buf, size);
-}
-
-static int unix_close(MigrationState *s)
-{
-    DPRINTF("unix_close\n");
-    if (s->fd != -1) {
-        close(s->fd);
-        s->fd = -1;
-    }
-    return 0;
-}
-
-static void unix_wait_for_connect(void *opaque)
+static void unix_wait_for_connect(int fd, void *opaque)
 {
     MigrationState *s = opaque;
-    int val, ret;
-    socklen_t valsize = sizeof(val);
 
-    DPRINTF("connect completed\n");
-    do {
-        ret = getsockopt(s->fd, SOL_SOCKET, SO_ERROR, (void *) &val, &valsize);
-    } while (ret == -1 && errno == EINTR);
-
-    if (ret < 0) {
+    if (fd < 0) {
+        DPRINTF("migrate connect error\n");
+        s->file = NULL;
         migrate_fd_error(s);
-        return;
-    }
-
-    qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
-
-    if (val == 0)
+    } else {
+        DPRINTF("migrate connect success\n");
+        s->file = qemu_fopen_socket(fd, "wb");
         migrate_fd_connect(s);
-    else {
-        DPRINTF("error connecting %d\n", val);
-        migrate_fd_error(s);
     }
 }
 
-int unix_start_outgoing_migration(MigrationState *s, const char *path)
+void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp)
 {
-    struct sockaddr_un addr;
-    int ret;
-
-    addr.sun_family = AF_UNIX;
-    snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", path);
-    s->get_error = unix_errno;
-    s->write = unix_write;
-    s->close = unix_close;
-
-    s->fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
-    if (s->fd < 0) {
-        DPRINTF("Unable to open socket");
-        return -errno;
-    }
-
-    socket_set_nonblock(s->fd);
-
-    do {
-        ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr));
-        if (ret == -1) {
-            ret = -errno;
-        }
-        if (ret == -EINPROGRESS || ret == -EWOULDBLOCK) {
-           qemu_set_fd_handler2(s->fd, NULL, NULL, unix_wait_for_connect, s);
-            return 0;
-        }
-    } while (ret == -EINTR);
-
-    if (ret < 0) {
-        DPRINTF("connect failed\n");
-        migrate_fd_error(s);
-        return ret;
-    }
-    migrate_fd_connect(s);
-    return 0;
+    unix_nonblocking_connect(path, unix_wait_for_connect, s, errp);
 }
 
 static void unix_accept_incoming_migration(void *opaque)
@@ -124,62 +61,38 @@ static void unix_accept_incoming_migration(void *opaque)
     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");
-        return;
+        goto out;
     }
 
-    f = qemu_fopen_socket(c);
+    f = qemu_fopen_socket(c, "rb");
     if (f == NULL) {
         fprintf(stderr, "could not qemu_fopen socket\n");
         goto out;
     }
 
     process_incoming_migration(f);
-    qemu_fclose(f);
+    return;
+
 out:
-    qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
-    close(s);
     close(c);
 }
 
-int unix_start_incoming_migration(const char *path)
+void unix_start_incoming_migration(const char *path, Error **errp)
 {
-    struct sockaddr_un un;
-    int sock;
-
-    DPRINTF("Attempting to start an incoming migration\n");
-
-    sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
-    if (sock < 0) {
-        fprintf(stderr, "Could not open unix socket: %s\n", strerror(errno));
-        return -EINVAL;
-    }
-
-    memset(&un, 0, sizeof(un));
-    un.sun_family = AF_UNIX;
-    snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
+    int s;
 
-    unlink(un.sun_path);
-    if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
-        fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
-        goto err;
-    }
-    if (listen(sock, 1) < 0) {
-        fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
-        goto err;
+    s = unix_listen(path, NULL, 0, errp);
+    if (s < 0) {
+        return;
     }
 
-    qemu_set_fd_handler2(sock, NULL, unix_accept_incoming_migration, NULL,
-                        (void *)(intptr_t)sock);
-
-    return 0;
-
-err:
-    close(sock);
-
-    return -EINVAL;
+    qemu_set_fd_handler2(s, NULL, unix_accept_incoming_migration, NULL,
+                         (void *)(intptr_t)s);
 }