This is a note to let you know that I've just added the patch titled
net: Implement missing getsockopt(SO_TIMESTAMPING_NEW)
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-implement-missing-getsockopt-so_timestamping_new.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 25a23006e5aa8f2a209151f20a1895aaa6b1d8e5
Author: Jörn-Thorben Hinz <jthinz@xxxxxxxxxxxxxxxxxxxx>
Date: Fri Dec 22 00:19:01 2023 +0100
net: Implement missing getsockopt(SO_TIMESTAMPING_NEW)
[ Upstream commit 7f6ca95d16b96567ce4cf458a2790ff17fa620c3 ]
Commit 9718475e6908 ("socket: Add SO_TIMESTAMPING_NEW") added the new
socket option SO_TIMESTAMPING_NEW. Setting the option is handled in
sk_setsockopt(), querying it was not handled in sk_getsockopt(), though.
Following remarks on an earlier submission of this patch, keep the old
behavior of getsockopt(SO_TIMESTAMPING_OLD) which returns the active
flags even if they actually have been set through SO_TIMESTAMPING_NEW.
The new getsockopt(SO_TIMESTAMPING_NEW) is stricter, returning flags
only if they have been set through the same option.
Fixes: 9718475e6908 ("socket: Add SO_TIMESTAMPING_NEW")
Link: https://lore.kernel.org/lkml/20230703175048.151683-1-jthinz@xxxxxxxxxxxxxxxxxxxx/
Link: https://lore.kernel.org/netdev/0d7cddc9-03fa-43db-a579-14f3e822615b@xxxxxxxxxxxxxxxx/
Signed-off-by: Jörn-Thorben Hinz <jthinz@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/core/sock.c b/net/core/sock.c
index bfaf47b3f3c7c..fe687e6170c9a 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1718,9 +1718,16 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
break;
case SO_TIMESTAMPING_OLD:
+ case SO_TIMESTAMPING_NEW:
lv = sizeof(v.timestamping);
- v.timestamping.flags = READ_ONCE(sk->sk_tsflags);
- v.timestamping.bind_phc = READ_ONCE(sk->sk_bind_phc);
+ /* For the later-added case SO_TIMESTAMPING_NEW: Be strict about only
+ * returning the flags when they were set through the same option.
+ * Don't change the beviour for the old case SO_TIMESTAMPING_OLD.
+ */
+ if (optname == SO_TIMESTAMPING_OLD || sock_flag(sk, SOCK_TSTAMP_NEW)) {
+ v.timestamping.flags = READ_ONCE(sk->sk_tsflags);
+ v.timestamping.bind_phc = READ_ONCE(sk->sk_bind_phc);
+ }
break;
case SO_RCVTIMEO_OLD:
