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Date: Wed, 13 May 2020 08:26:19 +0200 From: Christoph Hellwig <hch@....de> To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org> Cc: Eric Dumazet <edumazet@...gle.com>, Alexey Kuznetsov <kuznet@....inr.ac.ru>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, Vlad Yasevich <vyasevich@...il.com>, Neil Horman <nhorman@...driver.com>, Marcelo Ricardo Leitner <marcelo.leitner@...il.com>, Jon Maloy <jmaloy@...hat.com>, Ying Xue <ying.xue@...driver.com>, drbd-dev@...ts.linbit.com, linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, linux-nvme@...ts.infradead.org, target-devel@...r.kernel.org, linux-afs@...ts.infradead.org, linux-cifs@...r.kernel.org, cluster-devel@...hat.com, ocfs2-devel@....oracle.com, netdev@...r.kernel.org, linux-sctp@...r.kernel.org, ceph-devel@...r.kernel.org, rds-devel@....oracle.com, linux-nfs@...r.kernel.org Subject: [PATCH 04/33] net: add sock_set_sndtimeo Add a helper to directly set the SO_SNDTIMEO_NEW sockopt from kernel space without going through a fake uaccess. The interface is simplified to only pass the seconds value, as that is the only thing needed at the moment. Signed-off-by: Christoph Hellwig <hch@....de> --- fs/dlm/lowcomms.c | 8 ++------ include/net/sock.h | 1 + net/core/sock.c | 11 +++++++++++ 3 files changed, 14 insertions(+), 6 deletions(-) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 48e7ba796c6fb..0c0a6413fdfcc 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1035,7 +1035,6 @@ static void sctp_connect_to_sock(struct connection *con) int result; int addr_len; struct socket *sock; - struct __kernel_sock_timeval tv = { .tv_sec = 5, .tv_usec = 0 }; if (con->nodeid == 0) { log_print("attempt to connect sock 0 foiled"); @@ -1087,13 +1086,10 @@ static void sctp_connect_to_sock(struct connection *con) * since O_NONBLOCK argument in connect() function does not work here, * then, we should restore the default value of this attribute. */ - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_NEW, (char *)&tv, - sizeof(tv)); + sock_set_sndtimeo(sock->sk, 5); result = sock->ops->connect(sock, (struct sockaddr *)&daddr, addr_len, 0); - memset(&tv, 0, sizeof(tv)); - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_NEW, (char *)&tv, - sizeof(tv)); + sock_set_sndtimeo(sock->sk, 0); if (result == -EINPROGRESS) result = 0; diff --git a/include/net/sock.h b/include/net/sock.h index cce11782dc295..809596ffd32d2 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2690,5 +2690,6 @@ void sock_def_readable(struct sock *sk); void sock_set_reuseaddr(struct sock *sk, unsigned char reuse); void sock_set_linger(struct sock *sk, bool onoff, unsigned int linger); void sock_set_priority(struct sock *sk, u32 priority); +void sock_set_sndtimeo(struct sock *sk, unsigned int secs); #endif /* _SOCK_H */ diff --git a/net/core/sock.c b/net/core/sock.c index e9f1e2247b004..76527681e50b9 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -752,6 +752,17 @@ void sock_set_priority(struct sock *sk, u32 priority) } EXPORT_SYMBOL(sock_set_priority); +void sock_set_sndtimeo(struct sock *sk, unsigned int secs) +{ + lock_sock(sk); + if (secs && secs < MAX_SCHEDULE_TIMEOUT / HZ - 1) + sk->sk_sndtimeo = secs * HZ; + else + sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; + release_sock(sk); +} +EXPORT_SYMBOL(sock_set_sndtimeo); + /* * This is meant for all protocols to use and covers goings on * at the socket level. Everything here is generic. -- 2.26.2
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