STP_RELOCATE message for kernel relocatability (re)adaption, starting implementation

1 files changed, 25 insertions, 0 deletions

diff --git a/runtime/staprun/common.c b/runtime/staprun/common.c
index 93da51d8..dca45e4d 100644
--- a/runtime/staprun/common.c
+++ b/runtime/staprun/common.c
@@ -314,3 +314,28 @@ err:
 	close(fd);
 	return -1;
 }
+
+
+/**
+ *      send_request - send request to kernel over control channel
+ *      @type: the relay-app command id
+ *      @data: pointer to the data to be sent
+ *      @len: length of the data to be sent
+ *
+ *      Returns 0 on success, negative otherwise.
+ *      XXX: no, it doesn't ... it should return @len on success.
+ */
+int send_request(int type, void *data, int len)
+{
+	char buf[1024];
+
+	/* Before doing memcpy, make sure 'buf' is big enough. */
+	if ((len + 4) > (int)sizeof(buf)) {
+		_err("exceeded maximum send_request size.\n");
+		return -1;
+	}
+	memcpy(buf, &type, 4);
+	memcpy(&buf[4], data, len);
+
+	return write(control_channel, buf, len + 4);
+}