From owner-dev-commits-src-branches@freebsd.org Tue May 11 01:15:50 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 242AE649B15; Tue, 11 May 2021 01:15:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FfKjy0DP1z4kRQ; Tue, 11 May 2021 01:15:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id EEC44701B; Tue, 11 May 2021 01:15:49 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 14B1FnHj044615; Tue, 11 May 2021 01:15:49 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 14B1FnHQ044614; Tue, 11 May 2021 01:15:49 GMT (envelope-from git) Date: Tue, 11 May 2021 01:15:49 GMT Message-Id: <202105110115.14B1FnHQ044614@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Rick Macklem Subject: git: 3e67975a0c08 - stable/13 - nfsd: fix a NFSv4.1 Linux client mount stuck in CLOSE_WAIT MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: rmacklem X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 3e67975a0c0807073daff24a3b6fa8942d3305d2 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 May 2021 01:15:50 -0000 The branch stable/13 has been updated by rmacklem: URL: https://cgit.FreeBSD.org/src/commit/?id=3e67975a0c0807073daff24a3b6fa8942d3305d2 commit 3e67975a0c0807073daff24a3b6fa8942d3305d2 Author: Rick Macklem AuthorDate: 2021-04-27 22:32:35 +0000 Commit: Rick Macklem CommitDate: 2021-05-11 01:12:21 +0000 nfsd: fix a NFSv4.1 Linux client mount stuck in CLOSE_WAIT It was reported that a NFSv4.1 Linux client mount against a FreeBSD12 server was hung, with the TCP connection in CLOSE_WAIT state on the server. When a NFSv4.1/4.2 mount is done and the back channel is bound to the TCP connection, the soclose() is delayed until a new TCP connection is bound to the back channel, due to a reference count being held on the SVCXPRT structure in the krpc for the socket. Without the soclose() call, the socket will remain in CLOSE_WAIT and this somehow caused the Linux client to hang. This patch adds calls to soshutdown(.., SHUT_WR) that are performed when the server side krpc sees that the socket is no longer usable. Since this can be done before the back channel is bound to a new TCP connection, it allows the TCP connection to proceed to CLOSED state. PR: 254590 (cherry picked from commit db8c27f499105dcc9872dcc46e88bdd570c24fee) --- sys/rpc/svc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sys/rpc/svc.c b/sys/rpc/svc.c index a059096e7b77..be0f08ebca9d 100644 --- a/sys/rpc/svc.c +++ b/sys/rpc/svc.c @@ -203,6 +203,8 @@ svcpool_cleanup(SVCPOOL *pool) mtx_unlock(&grp->sg_lock); } TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { + if (xprt->xp_socket != NULL) + soshutdown(xprt->xp_socket, SHUT_WR); SVC_RELEASE(xprt); } @@ -388,6 +390,8 @@ xprt_unregister(SVCXPRT *xprt) xprt_unregister_locked(xprt); mtx_unlock(&grp->sg_lock); + if (xprt->xp_socket != NULL) + soshutdown(xprt->xp_socket, SHUT_WR); SVC_RELEASE(xprt); } @@ -1078,6 +1082,7 @@ svc_checkidle(SVCGROUP *grp) mtx_unlock(&grp->sg_lock); TAILQ_FOREACH_SAFE(xprt, &cleanup, xp_link, nxprt) { + soshutdown(xprt->xp_socket, SHUT_WR); SVC_RELEASE(xprt); } mtx_lock(&grp->sg_lock);