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Message-Id: <1486559235-13633-1-git-send-email-fgao@ikuai8.com> Date: Wed, 8 Feb 2017 21:07:15 +0800 From: fgao@...ai8.com To: davem@...emloft.net, netdev@...r.kernel.org Cc: gfree.wind@...il.com, Gao Feng <fgao@...ai8.com> Subject: [PATCH net 1/1] net: sock: Use double send/recv buff value to compare with max value From: Gao Feng <fgao@...ai8.com> Because the value of SO_SNDBUF and SO_RCVBUF is doubled before assignment, so the real value of send and recv buffer could be more than the max sysctl config sysctl_wmem_max and sysctl_rmem_max. Now use doulbe send/recv buffer value to compare with sysctl_wmem_max and sysctl_rmem_max, and it keeps consistence with SOCK_MIN_SNDBUF and SOCK_MIN_RCVBUF. Signed-off-by: Gao Feng <fgao@...ai8.com> --- net/core/sock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/core/sock.c b/net/core/sock.c index 4eca27d..fa40dff 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -712,7 +712,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname, * play 'guess the biggest size' games. RCVBUF/SNDBUF * are treated in BSD as hints */ - val = min_t(u32, val, sysctl_wmem_max); + val = min_t(u32, val * 2, sysctl_wmem_max); set_sndbuf: sk->sk_userlocks |= SOCK_SNDBUF_LOCK; sk->sk_sndbuf = max_t(int, val * 2, SOCK_MIN_SNDBUF); @@ -733,7 +733,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname, * play 'guess the biggest size' games. RCVBUF/SNDBUF * are treated in BSD as hints */ - val = min_t(u32, val, sysctl_rmem_max); + val = min_t(u32, val * 2, sysctl_rmem_max); set_rcvbuf: sk->sk_userlocks |= SOCK_RCVBUF_LOCK; /* -- 1.9.1
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