seemp: port instrumentation and logging service

Port seemp related instrumentation and logging service to from
msm-4.4 to msm-4.9. This change serves two purposes:
- Enable logging service for API events – logged events are read by
  userspace components
- Log relevant kernel events

Change-Id: I6eeadc0cb0033d167dde49703269946c77f2acda
Signed-off-by: Yida Wang <yidaw@codeaurora.org>
diff --git a/net/socket.c b/net/socket.c
index e825856..c518841 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -89,6 +89,8 @@
 #include <linux/magic.h>
 #include <linux/slab.h>
 #include <linux/xattr.h>
+#include <linux/seemp_api.h>
+#include <linux/seemp_instrumentation.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -1646,6 +1648,8 @@
 	struct iovec iov;
 	int fput_needed;
 
+	seemp_logk_sendto(fd, buff, len, flags, addr, addr_len);
+
 	err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter);
 	if (unlikely(err))
 		return err;