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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: f24b9be595 ("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>
This commit is contained in:
Willem de Bruijn 2014-09-03 12:01:18 -04:00 committed by David S. Miller
parent 4357450af3
commit c199105d15
2 changed files with 2 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/sock.h
View File

@ -2165,9 +2165,7 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
*/ */
if (sock_flag(sk, SOCK_RCVTSTAMP) || if (sock_flag(sk, SOCK_RCVTSTAMP) ||
(sk->sk_tsflags & SOF_TIMESTAMPING_RX_SOFTWARE) || (sk->sk_tsflags & SOF_TIMESTAMPING_RX_SOFTWARE) ||
(kt.tv64 && (kt.tv64 && sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) ||
(sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE ||
skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP)) ||
(hwtstamps->hwtstamp.tv64 && (hwtstamps->hwtstamp.tv64 &&
(sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE))) (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE)))
__sock_recv_timestamp(msg, sk, skb); __sock_recv_timestamp(msg, sk, skb);

3
net/socket.c
View File

@ -734,8 +734,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
} }
memset(&tss, 0, sizeof(tss)); memset(&tss, 0, sizeof(tss));
if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE || if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) &&
skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP) &&
ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) ktime_to_timespec_cond(skb->tstamp, tss.ts + 0))
empty = 0; empty = 0;
if (shhwtstamps && if (shhwtstamps &&