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| author | Willem de Bruijn <willemb@google.com> | 2014-09-03 12:01:18 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-05 15:02:43 -0700 |
| commit | c199105d154e029cd8c94cccd35bd073e64acc45 (patch) | |
| tree | b268f9b6beba39274edf9b250ea3cfe22bebe25a | |
| parent | 4357450af3422219d3f77bd54f7b9a8a40f193c9 (diff) | |
| download | lwn-c199105d154e029cd8c94cccd35bd073e64acc45.tar.gz lwn-c199105d154e029cd8c94cccd35bd073e64acc45.zip | |
net-timestamp: only report sw timestamp if reporting bit is set
The timestamping API has separate bits for generating and reporting
timestamps. A software timestamp should only be reported for a packet
when the packet has the relevant generation flag (SKBTX_..) set
and the socket has reporting bit SOF_TIMESTAMPING_SOFTWARE set.
The second check was accidentally removed. Reinstitute the original
behavior.
Tested:
Without this patch, Documentation/networking/txtimestamp reports
timestamps regardless of whether SOF_TIMESTAMPING_SOFTWARE is set.
After the patch, it only reports them when the flag is set.
Fixes: f24b9be5957b ("net-timestamp: extend SCM_TIMESTAMPING ancillary data struct")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/sock.h | 4 | ||||
| -rw-r--r-- | net/socket.c | 3 |
2 files changed, 2 insertions, 5 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 7f2ab72f321a..b9a5bd0ed9f3 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2165,9 +2165,7 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) */ if (sock_flag(sk, SOCK_RCVTSTAMP) || (sk->sk_tsflags & SOF_TIMESTAMPING_RX_SOFTWARE) || - (kt.tv64 && - (sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE || - skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP)) || + (kt.tv64 && sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) || (hwtstamps->hwtstamp.tv64 && (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE))) __sock_recv_timestamp(msg, sk, skb); diff --git a/net/socket.c b/net/socket.c index 95ee7d8682e7..4eb09b34b2d3 100644 --- a/net/socket.c +++ b/net/socket.c @@ -734,8 +734,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, } memset(&tss, 0, sizeof(tss)); - if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE || - skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP) && + if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) empty = 0; if (shhwtstamps && |