From owner-svn-src-head@freebsd.org Sun May 13 12:42:55 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F2837FDABC3; Sun, 13 May 2018 12:42:54 +0000 (UTC) (envelope-from rmacklem@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9B1446E00D; Sun, 13 May 2018 12:42:54 +0000 (UTC) (envelope-from rmacklem@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 5EC2A59D8; Sun, 13 May 2018 12:42:54 +0000 (UTC) (envelope-from rmacklem@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w4DCgs6a070795; Sun, 13 May 2018 12:42:54 GMT (envelope-from rmacklem@FreeBSD.org) Received: (from rmacklem@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w4DCgs7b070794; Sun, 13 May 2018 12:42:54 GMT (envelope-from rmacklem@FreeBSD.org) Message-Id: <201805131242.w4DCgs7b070794@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: rmacklem set sender to rmacklem@FreeBSD.org using -f From: Rick Macklem Date: Sun, 13 May 2018 12:42:54 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r333580 - head/sys/fs/nfsserver X-SVN-Group: head X-SVN-Commit-Author: rmacklem X-SVN-Commit-Paths: head/sys/fs/nfsserver X-SVN-Commit-Revision: 333580 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 May 2018 12:42:55 -0000 Author: rmacklem Date: Sun May 13 12:42:53 2018 New Revision: 333580 URL: https://svnweb.freebsd.org/changeset/base/333580 Log: Fix a slow leak of session structures in the NFSv4.1 server. For a fairly rare case of a client doing an ExchangeID after a hard reboot, the old confirmed clientid still exists, but some clients use a new co_verifier. For this case, the server was not freeing up the sessions on the old confirmed clientid. This patch fixes this case. It also adds two LIST_INIT() macros, which are actually no-ops, since the structure is malloc()d with M_ZERO so the pointer is already set to NULL. It should have minimal impact, since the only way I could exercise this code path was by doing a hard power cycle (pulling the plus) on a machine running Linux with a NFSv4.1 mount on the server. Originally spotted during testing of the ESXi 6.5 client. Tested by: andreas.nagy@frequentis.com MFC after: 2 months Modified: head/sys/fs/nfsserver/nfs_nfsdstate.c Modified: head/sys/fs/nfsserver/nfs_nfsdstate.c ============================================================================== --- head/sys/fs/nfsserver/nfs_nfsdstate.c Sun May 13 12:29:09 2018 (r333579) +++ head/sys/fs/nfsserver/nfs_nfsdstate.c Sun May 13 12:42:53 2018 (r333580) @@ -180,9 +180,10 @@ nfsrv_setclient(struct nfsrv_descript *nd, struct nfsc nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) { struct nfsclient *clp = NULL, *new_clp = *new_clpp; - int i, error = 0; + int i, error = 0, ret; struct nfsstate *stp, *tstp; struct sockaddr_in *sad, *rad; + struct nfsdsession *sep, *nsep; int zapit = 0, gotit, hasstate = 0, igotlock; static u_int64_t confirm_index = 0; @@ -352,6 +353,15 @@ nfsrv_setclient(struct nfsrv_descript *nd, struct nfsc * can be thrown away once the SETCLIENTID_CONFIRM occurs. */ LIST_REMOVE(clp, lc_hash); + + /* Get rid of all sessions on this clientid. */ + LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) { + ret = nfsrv_freesession(sep, NULL); + if (ret != 0) + printf("nfsrv_setclient: verifier changed free" + " session failed=%d\n", ret); + } + new_clp->lc_flags |= LCL_NEEDSCONFIRM; if ((nd->nd_flag & ND_NFSV41) != 0) new_clp->lc_confirm.lval[0] = confirmp->lval[0] = @@ -387,6 +397,7 @@ nfsrv_setclient(struct nfsrv_descript *nd, struct nfsc LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) tstp->ls_clp = new_clp; } + LIST_INIT(&new_clp->lc_session); LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, lc_hash); nfsstatsv1.srvclients++; @@ -451,6 +462,7 @@ nfsrv_setclient(struct nfsrv_descript *nd, struct nfsc LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) tstp->ls_clp = new_clp; } + LIST_INIT(&new_clp->lc_session); LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, lc_hash); nfsstatsv1.srvclients++;