Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2ED39C43387 for ; Mon, 24 Dec 2018 11:45:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 069BA2176F for ; Mon, 24 Dec 2018 11:45:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725446AbeLXLpI (ORCPT ); Mon, 24 Dec 2018 06:45:08 -0500 Received: from relay.sw.ru ([185.231.240.75]:50640 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725268AbeLXLpI (ORCPT ); Mon, 24 Dec 2018 06:45:08 -0500 Received: from [172.16.24.21] by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1gbOfR-0004ZN-FU; Mon, 24 Dec 2018 14:45:05 +0300 From: Vasily Averin Subject: [PATCH v4 03/10] sunrpc: replace svc_serv->sv_bc_xprt by boolean flag To: "J. Bruce Fields" , Trond Myklebust Cc: Jeff Layton , Anna Schumaker , Chuck Lever , linux-nfs@vger.kernel.org, Evgenii Shatokhin References: Message-ID: <3105562e-fbac-432d-f95a-7f87c5a2551a@virtuozzo.com> Date: Mon, 24 Dec 2018 14:45:04 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org svc_serv-> sv_bc_xprt is netns-unsafe and cannot be used as pointer. To prevent its misuse in future it is replaced by new boolean flag. Signed-off-by: Vasily Averin --- fs/nfs/callback.c | 8 +++++--- include/linux/sunrpc/bc_xprt.h | 10 ++++------ include/linux/sunrpc/svc.h | 2 +- net/sunrpc/svcsock.c | 2 -- net/sunrpc/xprtrdma/svc_rdma_transport.c | 1 - 5 files changed, 10 insertions(+), 13 deletions(-) diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index 509dc5adeb8f..6dd04774aedc 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -206,11 +206,13 @@ static int nfs_callback_up_net(int minorversion, struct svc_serv *serv, goto err_bind; } - ret = -EPROTONOSUPPORT; + ret = 0; if (!IS_ENABLED(CONFIG_NFS_V4_1) || minorversion == 0) ret = nfs4_callback_up_net(serv, net); - else if (xprt->ops->bc_up) - ret = xprt->ops->bc_up(serv, net); + else if (xprt->ops->bc_setup) + serv->sv_bc_enabled = true; + else + ret = -EPROTONOSUPPORT; if (ret < 0) { printk(KERN_ERR "NFS: callback service start failed\n"); diff --git a/include/linux/sunrpc/bc_xprt.h b/include/linux/sunrpc/bc_xprt.h index 28721cf73ec3..4e8c773d02be 100644 --- a/include/linux/sunrpc/bc_xprt.h +++ b/include/linux/sunrpc/bc_xprt.h @@ -47,11 +47,9 @@ void xprt_free_bc_rqst(struct rpc_rqst *req); /* * Determine if a shared backchannel is in use */ -static inline int svc_is_backchannel(const struct svc_rqst *rqstp) +static inline bool svc_is_backchannel(const struct svc_rqst *rqstp) { - if (rqstp->rq_server->sv_bc_xprt) - return 1; - return 0; + return rqstp->rq_server->sv_bc_enabled; } #else /* CONFIG_SUNRPC_BACKCHANNEL */ static inline int xprt_setup_backchannel(struct rpc_xprt *xprt, @@ -60,9 +58,9 @@ static inline int xprt_setup_backchannel(struct rpc_xprt *xprt, return 0; } -static inline int svc_is_backchannel(const struct svc_rqst *rqstp) +static inline bool svc_is_backchannel(const struct svc_rqst *rqstp) { - return 0; + return false; } static inline void xprt_free_bc_request(struct rpc_rqst *req) diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index fdb6b317d974..e52385340b3b 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -109,7 +109,7 @@ struct svc_serv { spinlock_t sv_cb_lock; /* protects the svc_cb_list */ wait_queue_head_t sv_cb_waitq; /* sleep here if there are no * entries in the svc_cb_list */ - struct svc_xprt *sv_bc_xprt; /* callback on fore channel */ + bool sv_bc_enabled; /* service uses backchannel */ #endif /* CONFIG_SUNRPC_BACKCHANNEL */ }; diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 793149ba1bda..8ce181ecb627 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1623,8 +1623,6 @@ static struct svc_xprt *svc_bc_create_socket(struct svc_serv *serv, svc_xprt_init(net, &svc_tcp_bc_class, xprt, serv); set_bit(XPT_CONG_CTRL, &svsk->sk_xprt.xpt_flags); - serv->sv_bc_xprt = xprt; - return xprt; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 2f7ec8912f49..d410e6f34f44 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -136,7 +136,6 @@ static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *serv, svc_xprt_init(net, &svc_rdma_bc_class, xprt, serv); set_bit(XPT_CONG_CTRL, &xprt->xpt_flags); - serv->sv_bc_xprt = xprt; dprintk("svcrdma: %s(%p)\n", __func__, xprt); return xprt; -- 2.17.1