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| author | Eric Dumazet <edumazet@google.com> | 2018-04-16 20:33:35 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-17 01:26:37 +0300 |
| commit | d1361840f8c519eaee9a78ffe09e4f0a1b586846 (patch) | |
| tree | 86a904ade99a93544e0817cda7dc842b12f9b833 /include/linux/net.h | |
| parent | 10b19aeac1700c3ba94fb50583a766d9cdaf1e9e (diff) | |
| download | linux-d1361840f8c519eaee9a78ffe09e4f0a1b586846.tar.xz | |
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.h | 1 |
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) \ |