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Miller" , Jakub Kicinski Date: Wed, 13 May 2020 08:26:30 +0200 Message-Id: <20200513062649.2100053-16-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513062649.2100053-1-hch@lst.de> References: <20200513062649.2100053-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-PDR: PASS X-Source-IP: 198.137.202.133 X-ServerName: bombadil.infradead.org X-Proofpoint-SPF-Result: None X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9619 signatures=668687 X-Proofpoint-Spam-Details: rule=tap_notspam policy=tap score=0 priorityscore=60 clxscore=234 bulkscore=0 mlxscore=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 malwarescore=0 suspectscore=0 cotscore=-2147483648 spamscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005130057 X-Spam: Clean X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 adultscore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005130058 Cc: Marcelo Ricardo Leitner , Eric Dumazet , linux-nvme@lists.infradead.org, linux-sctp@vger.kernel.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, drbd-dev@lists.linbit.com, linux-cifs@vger.kernel.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, cluster-devel@redhat.com, Alexey Kuznetsov , linux-block@vger.kernel.org, ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org, Neil Horman , Hideaki YOSHIFUJI , netdev@vger.kernel.org, Vlad Yasevich , linux-kernel@vger.kernel.org, Jon Maloy , Ying Xue , ocfs2-devel@oss.oracle.com Subject: [Ocfs2-devel] [PATCH 15/33] tcp: add tcp_sock_set_keepidle X-BeenThere: ocfs2-devel@oss.oracle.com X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: ocfs2-devel-bounces@oss.oracle.com Errors-To: ocfs2-devel-bounces@oss.oracle.com X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9619 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 malwarescore=0 bulkscore=0 phishscore=0 suspectscore=0 adultscore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005130058 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9619 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 cotscore=-2147483648 bulkscore=0 phishscore=0 adultscore=0 mlxlogscore=999 lowpriorityscore=0 impostorscore=0 spamscore=0 malwarescore=0 priorityscore=1501 mlxscore=0 suspectscore=0 clxscore=1034 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005130059 Add a helper to directly set the TCP_KEEP_IDLE sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig --- include/linux/tcp.h | 1 + net/ipv4/tcp.c | 49 ++++++++++++++++++++++++++++++------------- net/rds/tcp_listen.c | 5 +---- net/sunrpc/xprtsock.c | 3 +-- 4 files changed, 37 insertions(+), 21 deletions(-) diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 69c988f84a184..4d3a3e959e45b 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -499,5 +499,6 @@ void tcp_sock_set_nodelay(struct sock *sk, bool on); void tcp_sock_set_quickack(struct sock *sk, int val); int tcp_sock_set_syncnt(struct sock *sk, int val); void tcp_sock_set_user_timeout(struct sock *sk, u32 val); +int tcp_sock_set_keepidle(struct sock *sk, int val); #endif /* _LINUX_TCP_H */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 9a8d062b17a48..22eb9159c7d05 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2890,6 +2890,39 @@ void tcp_sock_set_user_timeout(struct sock *sk, u32 val) } EXPORT_SYMBOL(tcp_sock_set_user_timeout); +static int __tcp_sock_set_keepidle(struct sock *sk, int val) +{ + struct tcp_sock *tp = tcp_sk(sk); + + if (val < 1 || val > MAX_TCP_KEEPIDLE) + return -EINVAL; + + tp->keepalive_time = val * HZ; + if (sock_flag(sk, SOCK_KEEPOPEN) && + !((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) { + u32 elapsed = keepalive_time_elapsed(tp); + + if (tp->keepalive_time > elapsed) + elapsed = tp->keepalive_time - elapsed; + else + elapsed = 0; + inet_csk_reset_keepalive_timer(sk, elapsed); + } + + return 0; +} + +int tcp_sock_set_keepidle(struct sock *sk, int val) +{ + int err; + + lock_sock(sk); + err = __tcp_sock_set_keepidle(sk, val); + release_sock(sk); + return err; +} +EXPORT_SYMBOL(tcp_sock_set_keepidle); + /* * Socket option code for TCP. */ @@ -3059,21 +3092,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level, break; case TCP_KEEPIDLE: - if (val < 1 || val > MAX_TCP_KEEPIDLE) - err = -EINVAL; - else { - tp->keepalive_time = val * HZ; - if (sock_flag(sk, SOCK_KEEPOPEN) && - !((1 << sk->sk_state) & - (TCPF_CLOSE | TCPF_LISTEN))) { - u32 elapsed = keepalive_time_elapsed(tp); - if (tp->keepalive_time > elapsed) - elapsed = tp->keepalive_time - elapsed; - else - elapsed = 0; - inet_csk_reset_keepalive_timer(sk, elapsed); - } - } + err = __tcp_sock_set_keepidle(sk, val); break; case TCP_KEEPINTVL: if (val < 1 || val > MAX_TCP_KEEPINTVL) diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c index e76ec64b43fe7..8c76969d8c878 100644 --- a/net/rds/tcp_listen.c +++ b/net/rds/tcp_listen.c @@ -52,10 +52,7 @@ int rds_tcp_keepalive(struct socket *sock) if (ret < 0) goto bail; - ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_KEEPIDLE, - (char *)&keepidle, sizeof(keepidle)); - if (ret < 0) - goto bail; + tcp_sock_set_keepidle(sock->sk, keepidle); /* KEEPINTVL is the interval between successive probes. We follow * the model in xs_tcp_finish_connecting() and re-use keepidle. diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 30d4c4fcd3e38..ea79446789c69 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -2107,8 +2107,7 @@ static void xs_tcp_set_socket_timeouts(struct rpc_xprt *xprt, /* TCP Keepalive options */ sock_set_keepalive(sock->sk, 1); - kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, - (char *)&keepidle, sizeof(keepidle)); + tcp_sock_set_keepidle(sock->sk, keepidle); kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, (char *)&keepidle, sizeof(keepidle)); kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT,