From owner-svn-src-head@freebsd.org Tue Sep 3 14:06:33 2019 Return-Path: Delivered-To: svn-src-head@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 23FA2DC9AD; Tue, 3 Sep 2019 14:06:28 +0000 (UTC) (envelope-from yuripv@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [96.47.72.132]) (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 "freefall.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46N7zR5WGxz4PZL; Tue, 3 Sep 2019 14:06:27 +0000 (UTC) (envelope-from yuripv@freebsd.org) Received: by freefall.freebsd.org (Postfix, from userid 1452) id 974FE1A6D3; Tue, 3 Sep 2019 14:06:08 +0000 (UTC) X-Original-To: yuripv@localmail.freebsd.org Delivered-To: yuripv@localmail.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [96.47.72.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mx1.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by freefall.freebsd.org (Postfix) with ESMTPS id 6E2098043; Mon, 8 Apr 2019 15:20:09 +0000 (UTC) (envelope-from owner-src-committers@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [96.47.72.132]) (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 "freefall.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2B6DB75952; Mon, 8 Apr 2019 15:20:09 +0000 (UTC) (envelope-from owner-src-committers@freebsd.org) Received: by freefall.freebsd.org (Postfix, from userid 538) id 125488041; Mon, 8 Apr 2019 15:20:09 +0000 (UTC) Delivered-To: src-committers@localmail.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [96.47.72.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mx1.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by freefall.freebsd.org (Postfix) with ESMTPS id 9042A803F for ; Mon, 8 Apr 2019 15:20:06 +0000 (UTC) (envelope-from kib@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 61DBE75947; Mon, 8 Apr 2019 15:20:06 +0000 (UTC) (envelope-from kib@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 3FA4A251FD; Mon, 8 Apr 2019 15:20:06 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x38FK6aY052743; Mon, 8 Apr 2019 15:20:06 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x38FK6UA052742; Mon, 8 Apr 2019 15:20:06 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201904081520.x38FK6UA052742@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r346031 - head/sys/ufs/ffs X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/sys/ufs/ffs X-SVN-Commit-Revision: 346031 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk X-Loop: FreeBSD.org Sender: owner-src-committers@freebsd.org X-Rspamd-Queue-Id: 2B6DB75952 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)[-0.997,0]; NEURAL_HAM_SHORT(-0.97)[-0.968,0]; ASN(0.00)[asn:11403, ipnet:96.47.64.0/20, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] Status: O X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Tue, 03 Sep 2019 14:06:33 -0000 X-Original-Date: Mon, 8 Apr 2019 15:20:06 +0000 (UTC) X-List-Received-Date: Tue, 03 Sep 2019 14:06:33 -0000 Author: kib Date: Mon Apr 8 15:20:05 2019 New Revision: 346031 URL: https://svnweb.freebsd.org/changeset/base/346031 Log: Handle races when remounting UFS volume from ro to rw. In particular, ensure that writers are not unleashed before SU structures are initialized. Also, correctly handle MNT_ASYNC before this. Reported and tested by: pho Reviewed by: mckusick Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/ufs/ffs/ffs_vfsops.c Modified: head/sys/ufs/ffs/ffs_vfsops.c ============================================================================== --- head/sys/ufs/ffs/ffs_vfsops.c Mon Apr 8 14:31:07 2019 (r346030) +++ head/sys/ufs/ffs/ffs_vfsops.c Mon Apr 8 15:20:05 2019 (r346031) @@ -154,7 +154,7 @@ ffs_mount(struct mount *mp) struct fs *fs; pid_t fsckpid = 0; int error, error1, flags; - uint64_t mntorflags; + uint64_t mntorflags, saved_mnt_flag; accmode_t accmode; struct nameidata ndp; char *fspec; @@ -371,25 +371,40 @@ ffs_mount(struct mount *mp) return (error); if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) return (error); + error = vfs_write_suspend_umnt(mp); + if (error != 0) + return (error); fs->fs_ronly = 0; MNT_ILOCK(mp); - mp->mnt_flag &= ~MNT_RDONLY; + saved_mnt_flag = MNT_RDONLY; + if (MOUNTEDSOFTDEP(mp) && (mp->mnt_flag & + MNT_ASYNC) != 0) + saved_mnt_flag |= MNT_ASYNC; + mp->mnt_flag &= ~saved_mnt_flag; MNT_IUNLOCK(mp); fs->fs_mtime = time_second; /* check to see if we need to start softdep */ if ((fs->fs_flags & FS_DOSOFTDEP) && (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ - vn_finished_write(mp); + fs->fs_ronly = 1; + MNT_ILOCK(mp); + mp->mnt_flag |= saved_mnt_flag; + MNT_IUNLOCK(mp); + vfs_write_resume(mp, 0); return (error); } fs->fs_clean = 0; if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { - vn_finished_write(mp); + fs->fs_ronly = 1; + MNT_ILOCK(mp); + mp->mnt_flag |= saved_mnt_flag; + MNT_IUNLOCK(mp); + vfs_write_resume(mp, 0); return (error); } if (fs->fs_snapinum[0] != 0) ffs_snapshot_mount(mp); - vn_finished_write(mp); + vfs_write_resume(mp, 0); } /* * Soft updates is incompatible with "async",