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authorEric Dumazet <edumazet@google.com>2018-04-16 10:33:35 -0700
committerDavid S. Miller <davem@davemloft.net>2018-04-16 18:26:37 -0400
commitd1361840f8c519eaee9a78ffe09e4f0a1b586846 (patch)
tree86a904ade99a93544e0817cda7dc842b12f9b833 /net/ipv4/af_inet.c
parent10b19aeac1700c3ba94fb50583a766d9cdaf1e9e (diff)
downloadlinux-d1361840f8c519eaee9a78ffe09e4f0a1b586846.tar.bz2
tcp: fix SO_RCVLOWAT and RCVBUF autotuning
Applications might use SO_RCVLOWAT on TCP socket hoping to receive one [E]POLLIN event only when a given amount of bytes are ready in socket receive queue. Problem is that receive autotuning is not aware of this constraint, meaning sk_rcvbuf might be too small to allow all bytes to be stored. Add a new (struct proto_ops)->set_rcvlowat method so that a protocol can override the default setsockopt(SO_RCVLOWAT) behavior. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index eaed0367e669..f5c562aaef35 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1006,6 +1006,7 @@ const struct proto_ops inet_stream_ops = {
.compat_getsockopt = compat_sock_common_getsockopt,
.compat_ioctl = inet_compat_ioctl,
#endif
+ .set_rcvlowat = tcp_set_rcvlowat,
};
EXPORT_SYMBOL(inet_stream_ops);