From: Cordenner jean noel Subject: [PATCH 2/2] i_version update - ext4 part Date: Fri, 05 Oct 2007 17:28:13 +0200 Message-ID: <1191598093.24615.46.camel@frecb002711.frec.bull.fr> Reply-To: jean-noel.cordenner@bull.net Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit To: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: Received: from ecfrec.frec.bull.fr ([129.183.4.8]:43898 "EHLO ecfrec.frec.bull.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759298AbXJEPb0 (ORCPT ); Fri, 5 Oct 2007 11:31:26 -0400 Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org This patch update the i_version field of the inode and add a mount option to enable this feature. The other condition to enable this feature is that the inode size should be 256-bytes. Signed-off-by: Jean Noel Cordenner --- fs/ext4/inode.c | 4 +++- fs/ext4/super.c | 7 ++++++- include/linux/ext4_fs.h | 1 + 3 files changed, 10 insertions(+), 2 deletions(-) Index: linux-2.6.23-rc8-ext4-i_version/fs/ext4/inode.c =================================================================== --- linux-2.6.23-rc8-ext4-i_version.orig/fs/ext4/inode.c 2007-10-03 18:11:17.000000000 +0200 +++ linux-2.6.23-rc8-ext4-i_version/fs/ext4/inode.c 2007-10-05 10:26:42.000000000 +0200 @@ -3173,7 +3173,9 @@ { int err = 0; - inode->i_version++; + if (test_opt(inode->i_sb, I_VERSION)) + inode_inc_iversion(inode); + /* the do_update_inode consumes one bh->b_count */ get_bh(iloc->bh); Index: linux-2.6.23-rc8-ext4-i_version/fs/ext4/super.c =================================================================== --- linux-2.6.23-rc8-ext4-i_version.orig/fs/ext4/super.c 2007-10-03 18:11:17.000000000 +0200 +++ linux-2.6.23-rc8-ext4-i_version/fs/ext4/super.c 2007-10-03 18:17:44.000000000 +0200 @@ -742,7 +742,7 @@ 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_delalloc, - Opt_mballoc, Opt_nomballoc, Opt_stripe, + Opt_mballoc, Opt_nomballoc, Opt_stripe, Opt_i_version, }; static match_table_t tokens = { @@ -800,6 +800,7 @@ {Opt_mballoc, "mballoc"}, {Opt_nomballoc, "nomballoc"}, {Opt_stripe, "stripe=%u"}, + {Opt_i_version, "i_version"}, {Opt_err, NULL}, {Opt_resize, "resize"}, }; @@ -1161,6 +1162,10 @@ return 0; sbi->s_stripe = option; break; + case Opt_i_version: + set_opt (sbi->s_mount_opt, I_VERSION); + sb->s_flags |= MS_I_VERSION; + break; default: printk (KERN_ERR "EXT4-fs: Unrecognized mount option \"%s\" " Index: linux-2.6.23-rc8-ext4-i_version/include/linux/ext4_fs.h =================================================================== --- linux-2.6.23-rc8-ext4-i_version.orig/include/linux/ext4_fs.h 2007-10-03 18:11:17.000000000 +0200 +++ linux-2.6.23-rc8-ext4-i_version/include/linux/ext4_fs.h 2007-10-03 18:11:54.000000000 +0200 @@ -500,6 +500,7 @@ #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ #define EXT4_MOUNT_DELALLOC 0x2000000 /* Delalloc support */ #define EXT4_MOUNT_MBALLOC 0x4000000 /* Buddy allocation support */ +#define EXT4_MOUNT_I_VERSION 0x8000000 /* i_version support */ /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ #ifndef _LINUX_EXT2_FS_H #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt