/**
* sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
* @sk: socket sending this packet
- * @tx_flags: filled with instructions for time stamping
+ * @tx_flags: completed with instructions for time stamping
+ *
+ * Note : callers should take care of initial *tx_flags value (usually 0)
*/
-void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
+void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags);
/**
* sk_eat_skb - Release a skb if it is no longer needed
}
EXPORT_SYMBOL(sock_release);
-void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags)
+void sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags)
{
- *tx_flags = 0;
+ u8 flags = *tx_flags;
+
if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE)
- *tx_flags |= SKBTX_HW_TSTAMP;
+ flags |= SKBTX_HW_TSTAMP;
+
if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE)
- *tx_flags |= SKBTX_SW_TSTAMP;
+ flags |= SKBTX_SW_TSTAMP;
+
if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED)
- *tx_flags |= SKBTX_SCHED_TSTAMP;
+ flags |= SKBTX_SCHED_TSTAMP;
+
if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK)
- *tx_flags |= SKBTX_ACK_TSTAMP;
+ flags |= SKBTX_ACK_TSTAMP;
if (sock_flag(sk, SOCK_WIFI_STATUS))
- *tx_flags |= SKBTX_WIFI_STATUS;
+ flags |= SKBTX_WIFI_STATUS;
+
+ *tx_flags = flags;
}
EXPORT_SYMBOL(sock_tx_timestamp);