From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Wed, 20 May 2020 21:54:40 +0200 Subject: [Ocfs2-devel] [PATCH 04/33] net: add sock_no_linger In-Reply-To: <20200520195509.2215098-1-hch@lst.de> References: <20200520195509.2215098-1-hch@lst.de> Message-ID: <20200520195509.2215098-5-hch@lst.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "David S. Miller" , Jakub Kicinski Cc: Marcelo Ricardo Leitner , Eric Dumazet , linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-sctp-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-afs-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, drbd-dev-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org, linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rds-devel-N0ozoZBvEnrZJqsBc5GL+g@public.gmane.org, Sagi Grimberg , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cluster-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, Alexey Kuznetsov , ceph-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Neil Horman , Hideaki YOSHIFUJI , netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Vlad Yasevich , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Jon Maloy , Ying Xue , ocfs2-devel-N0ozoZBvEnrZJqsBc5GL+g@public.gmane.org Add a helper to directly set the SO_LINGER sockopt from kernel space with onoff set to true and a linger time of 0 without going through a fake uaccess. Signed-off-by: Christoph Hellwig Acked-by: Sagi Grimberg --- drivers/nvme/host/tcp.c | 9 +-------- drivers/nvme/target/tcp.c | 6 +----- include/net/sock.h | 1 + net/core/sock.c | 9 +++++++++ net/rds/tcp.h | 1 - net/rds/tcp_connect.c | 2 +- net/rds/tcp_listen.c | 13 +------------ net/sunrpc/svcsock.c | 12 ++---------- 8 files changed, 16 insertions(+), 37 deletions(-) diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index c15a92163c1f7..e72d87482eb78 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1313,7 +1313,6 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, { struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); struct nvme_tcp_queue *queue = &ctrl->queues[qid]; - struct linger sol = { .l_onoff = 1, .l_linger = 0 }; int ret, opt, rcv_pdu_size; queue->ctrl = ctrl; @@ -1361,13 +1360,7 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, * close. This is done to prevent stale data from being sent should * the network connection be restored before TCP times out. */ - ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_LINGER, - (char *)&sol, sizeof(sol)); - if (ret) { - dev_err(nctrl->device, - "failed to set SO_LINGER sock opt %d\n", ret); - goto err_sock; - } + sock_no_linger(queue->sock->sk); if (so_priority > 0) { ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY, diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 40757a63f4553..e0801494b097f 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -1429,7 +1429,6 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue) { struct socket *sock = queue->sock; struct inet_sock *inet = inet_sk(sock->sk); - struct linger sol = { .l_onoff = 1, .l_linger = 0 }; int ret; ret = kernel_getsockname(sock, @@ -1447,10 +1446,7 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue) * close. This is done to prevent stale data from being sent should * the network connection be restored before TCP times out. */ - ret = kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER, - (char *)&sol, sizeof(sol)); - if (ret) - return ret; + sock_no_linger(sock->sk); if (so_priority > 0) { ret = kernel_setsockopt(sock, SOL_SOCKET, SO_PRIORITY, diff --git a/include/net/sock.h b/include/net/sock.h index 2ec085044790c..6ed00bf009bbe 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2688,6 +2688,7 @@ static inline bool sk_dev_equal_l3scope(struct sock *sk, int dif) void sock_def_readable(struct sock *sk); +void sock_no_linger(struct sock *sk); void sock_set_reuseaddr(struct sock *sk); #endif /* _SOCK_H */ diff --git a/net/core/sock.c b/net/core/sock.c index 18eb84fdf5fbe..f0f09524911c8 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -720,6 +720,15 @@ void sock_set_reuseaddr(struct sock *sk) } EXPORT_SYMBOL(sock_set_reuseaddr); +void sock_no_linger(struct sock *sk) +{ + lock_sock(sk); + sk->sk_lingertime = 0; + sock_set_flag(sk, SOCK_LINGER); + release_sock(sk); +} +EXPORT_SYMBOL(sock_no_linger); + /* * This is meant for all protocols to use and covers goings on * at the socket level. Everything here is generic. diff --git a/net/rds/tcp.h b/net/rds/tcp.h index 3c69361d21c73..d640e210b97b6 100644 --- a/net/rds/tcp.h +++ b/net/rds/tcp.h @@ -73,7 +73,6 @@ void rds_tcp_listen_data_ready(struct sock *sk); int rds_tcp_accept_one(struct socket *sock); int rds_tcp_keepalive(struct socket *sock); void *rds_tcp_listen_sock_def_readable(struct net *net); -void rds_tcp_set_linger(struct socket *sock); /* tcp_recv.c */ int rds_tcp_recv_init(void); diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c index 008f50fb25dd2..4e64598176b05 100644 --- a/net/rds/tcp_connect.c +++ b/net/rds/tcp_connect.c @@ -207,7 +207,7 @@ void rds_tcp_conn_path_shutdown(struct rds_conn_path *cp) if (sock) { if (rds_destroy_pending(cp->cp_conn)) - rds_tcp_set_linger(sock); + sock_no_linger(sock->sk); sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN); lock_sock(sock->sk); rds_tcp_restore_callbacks(sock, tc); /* tc->tc_sock = NULL */ diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c index 810a3a49e9474..bbb31b9c0b391 100644 --- a/net/rds/tcp_listen.c +++ b/net/rds/tcp_listen.c @@ -111,17 +111,6 @@ struct rds_tcp_connection *rds_tcp_accept_one_path(struct rds_connection *conn) return NULL; } -void rds_tcp_set_linger(struct socket *sock) -{ - struct linger no_linger = { - .l_onoff = 1, - .l_linger = 0, - }; - - kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER, - (char *)&no_linger, sizeof(no_linger)); -} - int rds_tcp_accept_one(struct socket *sock) { struct socket *new_sock = NULL; @@ -241,7 +230,7 @@ int rds_tcp_accept_one(struct socket *sock) * be pending on it. By setting linger, we achieve the side-effect * of avoiding TIME_WAIT state on new_sock. */ - rds_tcp_set_linger(new_sock); + sock_no_linger(new_sock->sk); kernel_sock_shutdown(new_sock, SHUT_RDWR); ret = 0; out: diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 023514e392b31..6773dacc64d8e 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -323,17 +323,9 @@ static int svc_tcp_has_wspace(struct svc_xprt *xprt) static void svc_tcp_kill_temp_xprt(struct svc_xprt *xprt) { - struct svc_sock *svsk; - struct socket *sock; - struct linger no_linger = { - .l_onoff = 1, - .l_linger = 0, - }; + struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - svsk = container_of(xprt, struct svc_sock, sk_xprt); - sock = svsk->sk_sock; - kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER, - (char *)&no_linger, sizeof(no_linger)); + sock_no_linger(svsk->sk_sock->sk); } /* -- 2.26.2