From: Mingming Cao Subject: [EXT4 set 4][PATCH 5/5] i_version: noversion mount option to disable inode version updates Date: Sun, 01 Jul 2007 03:37:53 -0400 Message-ID: <1183275474.4010.132.camel@localhost.localdomain> Reply-To: cmm@us.ibm.com Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org Return-path: Received: from e5.ny.us.ibm.com ([32.97.182.145]:55078 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756995AbXGAHhz (ORCPT ); Sun, 1 Jul 2007 03:37:55 -0400 Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Add a "noversion" mount option to disable inode version updates. Signed-off-by: Andreas Dilger Signed-off-by: Kalpak Shah Index: linux-2.6.21/fs/ext4/super.c =================================================================== --- linux-2.6.21.orig/fs/ext4/super.c +++ linux-2.6.21/fs/ext4/super.c @@ -725,7 +725,7 @@ enum { Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, - Opt_grpquota, Opt_extents, Opt_noextents, + Opt_grpquota, Opt_extents, Opt_noextents, Opt_noversion, }; static match_table_t tokens = { @@ -777,6 +777,7 @@ static match_table_t tokens = { {Opt_barrier, "barrier=%u"}, {Opt_extents, "extents"}, {Opt_noextents, "noextents"}, + {Opt_noversion, "noversion"}, {Opt_err, NULL}, {Opt_resize, "resize"}, }; @@ -1115,6 +1116,9 @@ clear_qf_name: case Opt_noextents: clear_opt (sbi->s_mount_opt, EXTENTS); break; + case Opt_noversion: + set_opt(sbi->s_mount_opt, NOVERSION); + break; default: printk (KERN_ERR "EXT4-fs: Unrecognized mount option \"%s\" " Index: linux-2.6.21/include/linux/ext4_fs.h =================================================================== --- linux-2.6.21.orig/include/linux/ext4_fs.h +++ linux-2.6.21/include/linux/ext4_fs.h @@ -473,6 +473,7 @@ do { \ #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ #define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ +#define EXT4_MOUNT_NOVERSION 0x800000 /* No inode version updates */ /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ #ifndef _LINUX_EXT2_FS_H Index: linux-2.6.21/fs/ext4/inode.c =================================================================== --- linux-2.6.21.orig/fs/ext4/inode.c +++ linux-2.6.21/fs/ext4/inode.c @@ -3082,7 +3082,9 @@ int ext4_mark_iloc_dirty(handle_t *handl { int err = 0; - inode->i_version++; + if (!test_opt(inode->i_sb, NOVERSION)) + inode->i_version++; + /* the do_update_inode consumes one bh->b_count */ get_bh(iloc->bh);