From owner-svn-src-stable@freebsd.org Sun Jan 6 22:48:57 2019 Return-Path: Delivered-To: svn-src-stable@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 3AA8B149DF59; Sun, 6 Jan 2019 22:48:57 +0000 (UTC) (envelope-from mckusick@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 D1AEB94E22; Sun, 6 Jan 2019 22:48:56 +0000 (UTC) (envelope-from mckusick@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 C53286F46; Sun, 6 Jan 2019 22:48:56 +0000 (UTC) (envelope-from mckusick@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x06MmuUa060349; Sun, 6 Jan 2019 22:48:56 GMT (envelope-from mckusick@FreeBSD.org) Received: (from mckusick@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x06MmuUU060348; Sun, 6 Jan 2019 22:48:56 GMT (envelope-from mckusick@FreeBSD.org) Message-Id: <201901062248.x06MmuUU060348@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mckusick set sender to mckusick@FreeBSD.org using -f From: Kirk McKusick Date: Sun, 6 Jan 2019 22:48:56 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r342820 - stable/12/sys/kern X-SVN-Group: stable-12 X-SVN-Commit-Author: mckusick X-SVN-Commit-Paths: stable/12/sys/kern X-SVN-Commit-Revision: 342820 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: D1AEB94E22 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.98)[-0.977,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.999,0] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Jan 2019 22:48:57 -0000 Author: mckusick Date: Sun Jan 6 22:48:56 2019 New Revision: 342820 URL: https://svnweb.freebsd.org/changeset/base/342820 Log: MFC of 342135 and 342290 Properly respond to error from VFS_ROOT() during mount. Sponsored by: Netflix Modified: stable/12/sys/kern/vfs_mount.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/vfs_mount.c ============================================================================== --- stable/12/sys/kern/vfs_mount.c Sun Jan 6 22:34:47 2019 (r342819) +++ stable/12/sys/kern/vfs_mount.c Sun Jan 6 22:48:56 2019 (r342820) @@ -837,7 +837,7 @@ vfs_domount_first( struct vattr va; struct mount *mp; struct vnode *newdp; - int error; + int error, error1; ASSERT_VOP_ELOCKED(vp, __func__); KASSERT((fsflags & MNT_UPDATE) == 0, ("MNT_UPDATE shouldn't be here")); @@ -889,8 +889,15 @@ vfs_domount_first( * XXX The final recipients of VFS_MOUNT just overwrite the ndp they * get. No freeing of cn_pnbuf. */ - error = VFS_MOUNT(mp); - if (error != 0) { + error1 = 0; + if ((error = VFS_MOUNT(mp)) != 0 || + (error1 = VFS_STATFS(mp, &mp->mnt_stat)) != 0 || + (error1 = VFS_ROOT(mp, LK_EXCLUSIVE, &newdp)) != 0) { + if (error1 != 0) { + error = error1; + if ((error1 = VFS_UNMOUNT(mp, 0)) != 0) + printf("VFS_UNMOUNT returned %d\n", error1); + } vfs_unbusy(mp); mp->mnt_vnodecovered = NULL; vfs_mount_destroy(mp); @@ -900,12 +907,12 @@ vfs_domount_first( vrele(vp); return (error); } + VOP_UNLOCK(newdp, 0); if (mp->mnt_opt != NULL) vfs_freeopts(mp->mnt_opt); mp->mnt_opt = mp->mnt_optnew; *optlist = NULL; - (void)VFS_STATFS(mp, &mp->mnt_stat); /* * Prevent external consumers of mount options from reading mnt_optnew. @@ -931,8 +938,7 @@ vfs_domount_first( TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); mtx_unlock(&mountlist_mtx); vfs_event_signal(NULL, VQ_MOUNT, 0); - if (VFS_ROOT(mp, LK_EXCLUSIVE, &newdp)) - panic("mount: lost mount"); + vn_lock(newdp, LK_EXCLUSIVE | LK_RETRY); VOP_UNLOCK(vp, 0); EVENTHANDLER_DIRECT_INVOKE(vfs_mounted, mp, newdp, td); VOP_UNLOCK(newdp, 0);