qemu/0136-qemu-file-fsync-a-writable-stdio-QEMUFile.patch

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From 701731a81e40d7321f619020b9062a5d88f7466a Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 22 Feb 2013 17:36:37 +0100
Subject: [PATCH] qemu-file: fsync a writable stdio QEMUFile
This is what fd_close does. Prepare for switching to a QEMUFile.
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit ce39ee3184a02eca7f9529cc19b1582f6f704c70)
---
savevm.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/savevm.c b/savevm.c
index 38699de..1d49fde 100644
--- a/savevm.c
+++ b/savevm.c
@@ -256,6 +256,24 @@ static int stdio_fclose(void *opaque)
{
QEMUFileStdio *s = opaque;
int ret = 0;
+
+ if (s->file->ops->put_buffer) {
+ int fd = fileno(s->stdio_file);
+ struct stat st;
+
+ ret = fstat(fd, &st);
+ if (ret == 0 && S_ISREG(st.st_mode)) {
+ /*
+ * If the file handle is a regular file make sure the
+ * data is flushed to disk before signaling success.
+ */
+ ret = fsync(fd);
+ if (ret != 0) {
+ ret = -errno;
+ return ret;
+ }
+ }
+ }
if (fclose(s->stdio_file) == EOF) {
ret = -errno;
}