From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Yury V. Zaytsev" Subject: Re: [PATCH] mke2fs: check that auto-detected blocksize <= sys_page_size Date: Fri, 01 Jul 2011 10:31:38 +0200 Message-ID: <1309509098.4859.12.camel@newpride> References: <1307524998.2467.41.camel@newpride> <1307918791.2872.18.camel@newpride> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Amir Goldstein , Mike Snitzer , linux-ext4@vger.kernel.org To: Ted Ts'o Return-path: Received: from mailgateway3.uni-freiburg.de ([132.230.2.213]:36805 "EHLO mailgateway3.uni-freiburg.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755447Ab1GAIbm (ORCPT ); Fri, 1 Jul 2011 04:31:42 -0400 In-Reply-To: <1307918791.2872.18.camel@newpride> Sender: linux-ext4-owner@vger.kernel.org List-ID: Hi! On Mon, 2011-06-13 at 00:46 +0200, Yury V. Zaytsev wrote: > I have refreshed patch against the latest "next" branch since it no > longer properly applied and hopefully it can now be included! I would highly appreciate if the trivial patch that nonetheless fixes an important issue to my mind posted last month could be looked at. Is there anything else I could do to help with the inclusion? Sorry if I am bumping the thread too fast, but I see other patches flowing in which makes me think that I've done something wrong; if this is the case please do let me know, I am willing to rectify it. Thanks! -- Sincerely yours, Yury V. Zaytsev > From 1f8e5ad235694f2918fb442135619d4988366434 Mon Sep 17 00:00:00 2001 > From: "Yury V. Zaytsev" > Date: Mon, 13 Jun 2011 00:35:05 +0200 > Subject: [PATCH] mke2fs: check that auto-detected blocksize <= sys_page_size > > Block size can be specified manually via the -b option or deduced > automatically. Unfortunately, the check that it is still smaller than > the system page size is only performed right after the command line > options are parsed. > > Therefore, if buggy or inappropriately installed/configured hardware > hints that larger block sizes have to be used, mkfs will silently create > a file system which can not be mounted on the system in question. > > By moving the check beyond the last assignment to blocksize it is now > ensured, that mkfs will issue a warning even if inappropriate blocksize > was auto-detected. > > The new behavior can be easily tested, by exporting the following > variables before running mkfs: > > export MKE2FS_DEVICE_SECTSIZE=8912 > export MKE2FS_DEVICE_PHYS_SECTSIZE=8912 > > Signed-off-by: Yury V. Zaytsev > --- > misc/mke2fs.c | 24 +++++++++++++----------- > 1 files changed, 13 insertions(+), 11 deletions(-) > > diff --git a/misc/mke2fs.c b/misc/mke2fs.c > index 5ff3f9f..d699b46 100644 > --- a/misc/mke2fs.c > +++ b/misc/mke2fs.c > @@ -1516,17 +1516,6 @@ profile_error: > ext2fs_close(jfs); > } > > - if (blocksize > sys_page_size) { > - if (!force) { > - com_err(program_name, 0, > - _("%d-byte blocks too big for system (max %d)"), > - blocksize, sys_page_size); > - proceed_question(); > - } > - fprintf(stderr, _("Warning: %d-byte blocks too big for system " > - "(max %d), forced to continue\n"), > - blocksize, sys_page_size); > - } > if (optind < argc) { > fs_blocks_count = parse_num_blocks2(argv[optind++], > fs_param.s_log_block_size); > @@ -1825,6 +1814,19 @@ profile_error: > > blocksize = EXT2_BLOCK_SIZE(&fs_param); > > + /* This check should happen beyond the last assignment to blocksize */ > + if (blocksize > sys_page_size) { > + if (!force) { > + com_err(program_name, 0, > + _("%d-byte blocks too big for system (max %d)"), > + blocksize, sys_page_size); > + proceed_question(); > + } > + fprintf(stderr, _("Warning: %d-byte blocks too big for system " > + "(max %d), forced to continue\n"), > + blocksize, sys_page_size); > + } > + > lazy_itable_init = 0; > if (access("/sys/fs/ext4/features/lazy_itable_init", R_OK) == 0) > lazy_itable_init = 1;