Add wrapper for setting blocking status on a QEMUFile
Add a wrapper to change the blocking status on a QEMUFile
rather than having to use qemu_set_block(qemu_get_fd(f));
it seems best to avoid exposing the fd since not all QEMUFile's
really have one. With this wrapper we could move the implementation
down to be different on different transports.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h
index 86bb972..66e741f 100644
--- a/include/migration/qemu-file.h
+++ b/include/migration/qemu-file.h
@@ -197,6 +197,7 @@
void qemu_file_set_error(QEMUFile *f, int ret);
int qemu_file_shutdown(QEMUFile *f);
void qemu_fflush(QEMUFile *f);
+void qemu_file_set_blocking(QEMUFile *f, bool block);
static inline void qemu_put_be64s(QEMUFile *f, const uint64_t *pv)
{
diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index e41a677..9ec2267 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -648,3 +648,18 @@
return res == len ? res : 0;
}
+
+/*
+ * Set the blocking state of the QEMUFile.
+ * Note: On some transports the OS only keeps a single blocking state for
+ * both directions, and thus changing the blocking on the main
+ * QEMUFile can also affect the return path.
+ */
+void qemu_file_set_blocking(QEMUFile *f, bool block)
+{
+ if (block) {
+ qemu_set_block(qemu_get_fd(f));
+ } else {
+ qemu_set_nonblock(qemu_get_fd(f));
+ }
+}
