[Bluetooth] Add compat handling for timestamp structure

The timestamp structure needs special handling in case of compat
programs. Use the same wrapping method the network core uses.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1dae3dfc66a9dd6a1ad90cfc790dea4f28fb85ef..68198a788969051abed4139f6745c2cda00dc216 100644 (file)
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -37,6 +37,7 @@
 #include <linux/skbuff.h>
 #include <linux/workqueue.h>
 #include <linux/interrupt.h>
+#include <linux/compat.h>
 #include <linux/socket.h>
 #include <linux/ioctl.h>
 #include <net/sock.h>
@@ -342,9 +343,23 @@ static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_
 
        if (mask & HCI_CMSG_TSTAMP) {
                struct timeval tv;
+               void *data;
+               int len;
 
                skb_get_timestamp(skb, &tv);
-               put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(tv), &tv);
+
+               if (msg->msg_flags & MSG_CMSG_COMPAT) {
+                       struct compat_timeval ctv;
+                       ctv.tv_sec = tv.tv_sec;
+                       ctv.tv_usec = tv.tv_usec;
+                       data = &ctv;
+                       len = sizeof(ctv);
+               } else {
+                       data = &tv;
+                       len = sizeof(tv);
+               }
+
+               put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
        }
 }