hi,
This patch apply on the top of the ext4 git tree.
It adds a mount option to enable i_version feature for ext4.
Signed-off-by: Jean noel Cordenner <jean-noel.cordenner@xxxxxxxx>
Index: linux-2.6.22-ext4/fs/ext4/super.c
===================================================================
--- linux-2.6.22-ext4.orig/fs/ext4/super.c 2007-07-26 10:48:52.000000000 +0200
+++ linux-2.6.22-ext4/fs/ext4/super.c 2007-07-26 17:29:44.000000000 +0200
@@ -736,7 +736,7 @@
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_i_version,
Opt_delayed_alloc, Opt_nodelayed_alloc,
};
@@ -793,6 +793,7 @@
{Opt_noextents, "noextents"},
{Opt_delayed_alloc, "delalloc"},
{Opt_nodelayed_alloc, "nodelalloc"},
+ {Opt_i_version, "i_version"},
{Opt_err, NULL},
{Opt_resize, "resize"},
};
@@ -1144,6 +1145,9 @@
case Opt_noextents:
clear_opt (sbi->s_mount_opt, EXTENTS);
break;
+ case Opt_i_version:
+ clear_opt (sbi->s_mount_opt, I_VERSION);
+ break;
default:
printk (KERN_ERR
"EXT4-fs: Unrecognized mount option \"%s\" "
Index: linux-2.6.22-ext4/include/linux/ext4_fs.h
===================================================================
--- linux-2.6.22-ext4.orig/include/linux/ext4_fs.h 2007-07-26 10:48:52.000000000 +0200
+++ linux-2.6.22-ext4/include/linux/ext4_fs.h 2007-07-26 10:51:11.000000000 +0200
@@ -489,6 +489,7 @@
#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */
#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */
#define EXT4_MOUNT_DELAYED_ALLOC 0x2000000/* Delayed allocation support*/
+#define EXT4_MOUNT_I_VERSION 0x4000000/* i_version support */
/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
#ifndef _LINUX_EXT2_FS_H
Index: linux-2.6.22-ext4/fs/ext4/inode.c
===================================================================
--- linux-2.6.22-ext4.orig/fs/ext4/inode.c 2007-07-26 10:48:52.000000000 +0200
+++ linux-2.6.22-ext4/fs/ext4/inode.c 2007-07-30 16:08:19.000000000 +0200
@@ -3107,7 +3107,9 @@
{
int err = 0;
- inode->i_version++;
+ if (test_opt(inode->i_sb, I_VERSION))
+ inode->i_version++;
+
/* the do_update_inode consumes one bh->b_count */
get_bh(iloc->bh);
