summaryrefslogtreecommitdiff
path: root/include/linux/net.h
diff options
context:
space:
mode:
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 /include/linux/net.h
parent10b19aeac1700c3ba94fb50583a766d9cdaf1e9e (diff)
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 'include/linux/net.h')
-rw-r--r--include/linux/net.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h
index 2248a052061d..6554d3ba4396 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -197,6 +197,7 @@ struct proto_ops {
int offset, size_t size, int flags);
int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg,
size_t size);
+ int (*set_rcvlowat)(struct sock *sk, int val);
};
#define DECLARE_SOCKADDR(type, dst, src) \