From owner-svn-src-all@freebsd.org Wed Dec 19 18:05:51 2018 Return-Path: Delivered-To: svn-src-all@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 2EF0C133EB0A; Wed, 19 Dec 2018 18:05:51 +0000 (UTC) (envelope-from emaste@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id BDBC08C8AB; Wed, 19 Dec 2018 18:05:50 +0000 (UTC) (envelope-from emaste@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 A1130197C1; Wed, 19 Dec 2018 18:05:50 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wBJI5oKG099673; Wed, 19 Dec 2018 18:05:50 GMT (envelope-from emaste@FreeBSD.org) Received: (from emaste@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wBJI5oQT099672; Wed, 19 Dec 2018 18:05:50 GMT (envelope-from emaste@FreeBSD.org) Message-Id: <201812191805.wBJI5oQT099672@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: emaste set sender to emaste@FreeBSD.org using -f From: Ed Maste Date: Wed, 19 Dec 2018 18:05:50 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r342226 - releng/11.2/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: releng X-SVN-Commit-Author: emaste X-SVN-Commit-Paths: releng/11.2/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Commit-Revision: 342226 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: BDBC08C8AB X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.97)[-0.966,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.998,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Dec 2018 18:05:51 -0000 Author: emaste Date: Wed Dec 19 18:05:50 2018 New Revision: 342226 URL: https://svnweb.freebsd.org/changeset/base/342226 Log: MFS11 r341828: Resolve a hang in ZFS during vnode reclaimation This is caused by a deadlock between zil_commit() and zfs_zget() Add a way for zfs_zget() to break out of the retry loop in the common case PR: 229614, 231117 Submitted by: allanjude Approved by: so Security: FreeBSD-EN-18:18.zfs Sponsored by: Klara Systems, The FreeBSD Foundation Modified: releng/11.2/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c Directory Properties: releng/11.2/ (props changed) Modified: releng/11.2/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c ============================================================================== --- releng/11.2/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c Wed Dec 19 18:00:58 2018 (r342225) +++ releng/11.2/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c Wed Dec 19 18:05:50 2018 (r342226) @@ -1155,15 +1155,27 @@ again: */ ASSERT3P(zp, !=, NULL); ASSERT3U(zp->z_id, ==, obj_num); - *zpp = zp; - vp = ZTOV(zp); + if (zp->z_unlinked) { + err = SET_ERROR(ENOENT); + } else { + vp = ZTOV(zp); + /* + * Don't let the vnode disappear after + * ZFS_OBJ_HOLD_EXIT. + */ + VN_HOLD(vp); + *zpp = zp; + err = 0; + } - /* Don't let the vnode disappear after ZFS_OBJ_HOLD_EXIT. */ - VN_HOLD(vp); - sa_buf_rele(db, NULL); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); + if (err) { + getnewvnode_drop_reserve(); + return (err); + } + locked = VOP_ISLOCKED(vp); VI_LOCK(vp); if ((vp->v_iflag & VI_DOOMED) != 0 && @@ -1196,7 +1208,7 @@ again: } VI_UNLOCK(vp); getnewvnode_drop_reserve(); - return (0); + return (err); } /*