Override befor_ram_iterate to send pipefd. It will write the
RAM_SAVE_FLAG_HOOK flags which will trigger the load hook to
receive it.
Signed-off-by: Lei Li <li...@linux.vnet.ibm.com>
---
migration-local.c | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/migration-local.c b/migration-local.c
index ed0ae6c..92c661c 100644
--- a/migration-local.c
+++ b/migration-local.c
@@ -114,6 +114,31 @@ static int qemu_local_close(void *opaque)
return 0;
}
+static int send_pipefd(int sockfd, int pipefd);
+
+static int qemu_local_send_pipefd(QEMUFile *f, void *opaque,
+ uint64_t flags)
+{
+ QEMUFileLocal *s = opaque;
+ int ret;
+
+ if (s->unix_page_flipping) {
+ /* Avoid sending pipe fd again in ram_save_complete() stage */
+ if (flags != RAM_CONTROL_FINISH) {
+ qemu_put_be64(f, RAM_SAVE_FLAG_HOOK);
+ qemu_fflush(f);
+ ret = send_pipefd(s->sockfd, s->pipefd[0]);
+ if (ret < 0) {
+ fprintf(stderr, "failed to pass pipe\n");
+ return ret;
+ }
+ DPRINTF("pipe fd was sent\n");
+ }
+ }
+
+ return 0;
+}
+
static const QEMUFileOps pipe_read_ops = {
.get_fd = qemu_local_get_sockfd,
.get_buffer = qemu_local_get_buffer,
@@ -124,6 +149,7 @@ static const QEMUFileOps pipe_write_ops = {
.get_fd = qemu_local_get_sockfd,
.writev_buffer = qemu_local_writev_buffer,
.close = qemu_local_close,
+ .before_ram_iterate = qemu_local_send_pipefd,
};
QEMUFile *qemu_fopen_socket_local(int sockfd, const char *mode)
--
1.7.7.6
