[PATCH] ext4: fix how i_version is modified and turn it on by default

[PATCH] ext4: fix how i_version is modified and turn it on by default

[Josef Bacik]

This makes MS_I_VERSION be turned on by default.  Ext4 had been
unconditionally doing i_version++ in a few cases anway so the mount option
was kind of silly.  This patch also removes the update in mark_inode_dirty
and makes all of the cases where we update ctime also do inode_inc_iversion.
file_update_time takes care of the write case and all the places where we
update iversion are protected by the i_mutex so there should be no extra
i_lock overhead in the normal non-exported fs case.  Thanks,

Signed-off-by: Josef Bacik <josef-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 fs/ext4/acl.c      |    1 +
 fs/ext4/extents.c  |    3 +++
 fs/ext4/indirect.c |    1 +
 fs/ext4/inode.c    |    3 ---
 fs/ext4/ioctl.c    |    2 ++
 fs/ext4/namei.c    |   14 ++++++++++----
 fs/ext4/super.c    |    5 +++--
 fs/ext4/xattr.c    |    1 +
 8 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index a5c29bb..fb3ff80 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -202,6 +202,7 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
 			if (error < 0)
 				return error;
 			else {
+				inode_inc_iversion(inode);
 				inode->i_ctime = ext4_current_time(inode);
 				ext4_mark_inode_dirty(handle, inode);
 				if (error == 0)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 74f23c2..a9ac029 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4249,6 +4249,7 @@ out_stop:
 	if (inode->i_nlink)
 		ext4_orphan_del(handle, inode);
 
+	inode_inc_iversion(inode);
 	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 	ext4_journal_stop(handle);
@@ -4261,6 +4262,7 @@ static void ext4_falloc_update_inode(struct inode *inode,
 
 	if (update_ctime) {
 		now = current_fs_time(inode->i_sb);
+		inode_inc_iversion(inode);
 		if (!timespec_equal(&inode->i_ctime, &now))
 			inode->i_ctime = now;
 	}
@@ -4905,6 +4907,7 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
 
 out:
 	ext4_orphan_del(handle, inode);
+	inode_inc_iversion(inode);
 	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 	ext4_journal_stop(handle);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 830e1b2..45ed6d4 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1476,6 +1476,7 @@ do_indirects:
 
 out_unlock:
 	up_write(&ei->i_data_sem);
+	inode_inc_iversion(inode);
 	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index feaa82f..d11b4e5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4314,9 +4314,6 @@ int ext4_mark_iloc_dirty(handle_t *handle,
 {
 	int err = 0;
 
-	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);
 
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 6eee255..c79b874 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -120,6 +120,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		ei->i_flags = flags;
 
 		ext4_set_inode_flags(inode);
+		inode_inc_iversion(inode);
 		inode->i_ctime = ext4_current_time(inode);
 
 		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
@@ -168,6 +169,7 @@ flags_out:
 		}
 		err = ext4_reserve_inode_write(handle, inode, &iloc);
 		if (err == 0) {
+			inode_inc_iversion(inode);
 			inode->i_ctime = ext4_current_time(inode);
 			inode->i_generation = generation;
 			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2043f48..9bb533a 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1316,9 +1316,9 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 	 * happen is that the times are slightly out of date
 	 * and/or different from the directory change time.
 	 */
+	inode_inc_iversion(dir);
 	dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
 	ext4_update_dx_flag(dir);
-	dir->i_version++;
 	ext4_mark_inode_dirty(handle, dir);
 	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
 	err = ext4_handle_dirty_metadata(handle, dir, bh);
@@ -1668,7 +1668,6 @@ static int ext4_delete_entry(handle_t *handle,
 					blocksize);
 			else
 				de->inode = 0;
-			dir->i_version++;
 			BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
 			err = ext4_handle_dirty_metadata(handle, dir, bh);
 			if (unlikely(err)) {
@@ -2158,13 +2157,14 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
 		ext4_warning(inode->i_sb,
 			     "empty directory has too many links (%d)",
 			     inode->i_nlink);
-	inode->i_version++;
 	clear_nlink(inode);
 	/* There's no need to set i_disksize: the fact that i_nlink is
 	 * zero will ensure that the right thing happens during any
 	 * recovery. */
 	inode->i_size = 0;
 	ext4_orphan_add(handle, inode);
+	inode_inc_iversion(inode);
+	inode_inc_iversion(dir);
 	inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 	ext4_dec_count(handle, dir);
@@ -2218,12 +2218,14 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 	retval = ext4_delete_entry(handle, dir, de, bh);
 	if (retval)
 		goto end_unlink;
+	inode_inc_iversion(dir);
 	dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
 	ext4_update_dx_flag(dir);
 	ext4_mark_inode_dirty(handle, dir);
 	drop_nlink(inode);
 	if (!inode->i_nlink)
 		ext4_orphan_add(handle, inode);
+	inode_inc_iversion(inode);
 	inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 	retval = 0;
@@ -2363,6 +2365,7 @@ retry:
 	if (IS_DIRSYNC(dir))
 		ext4_handle_sync(handle);
 
+	inode_inc_iversion(inode);
 	inode->i_ctime = ext4_current_time(inode);
 	ext4_inc_count(handle, inode);
 	ihold(inode);
@@ -2470,7 +2473,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 		if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
 					      EXT4_FEATURE_INCOMPAT_FILETYPE))
 			new_de->file_type = old_de->file_type;
-		new_dir->i_version++;
+		inode_inc_iversion(new_dir);
 		new_dir->i_ctime = new_dir->i_mtime =
 					ext4_current_time(new_dir);
 		ext4_mark_inode_dirty(handle, new_dir);
@@ -2488,6 +2491,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 	 * Like most other Unix systems, set the ctime for inodes on a
 	 * rename.
 	 */
+	inode_inc_iversion(old_inode);
 	old_inode->i_ctime = ext4_current_time(old_inode);
 	ext4_mark_inode_dirty(handle, old_inode);
 
@@ -2521,8 +2525,10 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 	if (new_inode) {
 		ext4_dec_count(handle, new_inode);
+		inode_inc_iversion(new_inode);
 		new_inode->i_ctime = ext4_current_time(new_inode);
 	}
+	inode_inc_iversion(old_dir);
 	old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
 	ext4_update_dx_flag(old_dir);
 	if (dir_bh) {
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 502c61f..5866d38 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1813,8 +1813,7 @@ set_qf_format:
 				 "Ignoring deprecated bh option");
 			break;
 		case Opt_i_version:
-			set_opt(sb, I_VERSION);
-			sb->s_flags |= MS_I_VERSION;
+			/* On by default now */
 			break;
 		case Opt_nodelalloc:
 			clear_opt(sb, DELALLOC);
@@ -3132,6 +3131,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 		goto out_free_orig;
 	}
 	sb->s_fs_info = sbi;
+	sb->s_flags |= MS_I_VERSION;
 	sbi->s_mount_opt = 0;
 	sbi->s_resuid = EXT4_DEF_RESUID;
 	sbi->s_resgid = EXT4_DEF_RESGID;
@@ -4831,6 +4831,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
 	handle = ext4_journal_start(inode, 1);
 	if (IS_ERR(handle))
 		goto out;
+	inode_inc_iversion(inode);
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	ext4_mark_inode_dirty(handle, inode);
 	ext4_journal_stop(handle);
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 93a00d8..48a3412 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1048,6 +1048,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 	}
 	if (!error) {
 		ext4_xattr_update_super_block(handle, inode->i_sb);
+		inode_inc_iversion(inode);
 		inode->i_ctime = ext4_current_time(inode);
 		if (!value)
 			ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
-- 
1.7.7.6

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Re: [PATCH] ext4: fix how i_version is modified and turn it on by default

[Jan Kara]

On Mon 14-05-12 14:47:19, Josef Bacik wrote:
> This makes MS_I_VERSION be turned on by default.  Ext4 had been
> unconditionally doing i_version++ in a few cases anway so the mount option
> was kind of silly.  This patch also removes the update in mark_inode_dirty
> and makes all of the cases where we update ctime also do inode_inc_iversion.
> file_update_time takes care of the write case and all the places where we
> update iversion are protected by the i_mutex so there should be no extra
> i_lock overhead in the normal non-exported fs case.  Thanks,
  Looks OK but it seems slightly fragile (forgetting to update i_version
when we add a place where we update i_ctime looks rather easy). So maybe we
should have a small helper like ext4_inode_update_time() which would update
c/mtime and i_version?

								Honza
 
> Signed-off-by: Josef Bacik <josef-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
>  fs/ext4/acl.c      |    1 +
>  fs/ext4/extents.c  |    3 +++
>  fs/ext4/indirect.c |    1 +
>  fs/ext4/inode.c    |    3 ---
>  fs/ext4/ioctl.c    |    2 ++
>  fs/ext4/namei.c    |   14 ++++++++++----
>  fs/ext4/super.c    |    5 +++--
>  fs/ext4/xattr.c    |    1 +
>  8 files changed, 21 insertions(+), 9 deletions(-)
> 
> diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
> index a5c29bb..fb3ff80 100644
> --- a/fs/ext4/acl.c
> +++ b/fs/ext4/acl.c
> @@ -202,6 +202,7 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
>  			if (error < 0)
>  				return error;
>  			else {
> +				inode_inc_iversion(inode);
>  				inode->i_ctime = ext4_current_time(inode);
>  				ext4_mark_inode_dirty(handle, inode);
>  				if (error == 0)
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index 74f23c2..a9ac029 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -4249,6 +4249,7 @@ out_stop:
>  	if (inode->i_nlink)
>  		ext4_orphan_del(handle, inode);
>  
> +	inode_inc_iversion(inode);
>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>  	ext4_mark_inode_dirty(handle, inode);
>  	ext4_journal_stop(handle);
> @@ -4261,6 +4262,7 @@ static void ext4_falloc_update_inode(struct inode *inode,
>  
>  	if (update_ctime) {
>  		now = current_fs_time(inode->i_sb);
> +		inode_inc_iversion(inode);
>  		if (!timespec_equal(&inode->i_ctime, &now))
>  			inode->i_ctime = now;
>  	}
> @@ -4905,6 +4907,7 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
>  
>  out:
>  	ext4_orphan_del(handle, inode);
> +	inode_inc_iversion(inode);
>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>  	ext4_mark_inode_dirty(handle, inode);
>  	ext4_journal_stop(handle);
> diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
> index 830e1b2..45ed6d4 100644
> --- a/fs/ext4/indirect.c
> +++ b/fs/ext4/indirect.c
> @@ -1476,6 +1476,7 @@ do_indirects:
>  
>  out_unlock:
>  	up_write(&ei->i_data_sem);
> +	inode_inc_iversion(inode);
>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>  	ext4_mark_inode_dirty(handle, inode);
>  
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index feaa82f..d11b4e5 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -4314,9 +4314,6 @@ int ext4_mark_iloc_dirty(handle_t *handle,
>  {
>  	int err = 0;
>  
> -	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);
>  
> diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
> index 6eee255..c79b874 100644
> --- a/fs/ext4/ioctl.c
> +++ b/fs/ext4/ioctl.c
> @@ -120,6 +120,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>  		ei->i_flags = flags;
>  
>  		ext4_set_inode_flags(inode);
> +		inode_inc_iversion(inode);
>  		inode->i_ctime = ext4_current_time(inode);
>  
>  		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
> @@ -168,6 +169,7 @@ flags_out:
>  		}
>  		err = ext4_reserve_inode_write(handle, inode, &iloc);
>  		if (err == 0) {
> +			inode_inc_iversion(inode);
>  			inode->i_ctime = ext4_current_time(inode);
>  			inode->i_generation = generation;
>  			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
> index 2043f48..9bb533a 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -1316,9 +1316,9 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
>  	 * happen is that the times are slightly out of date
>  	 * and/or different from the directory change time.
>  	 */
> +	inode_inc_iversion(dir);
>  	dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
>  	ext4_update_dx_flag(dir);
> -	dir->i_version++;
>  	ext4_mark_inode_dirty(handle, dir);
>  	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
>  	err = ext4_handle_dirty_metadata(handle, dir, bh);
> @@ -1668,7 +1668,6 @@ static int ext4_delete_entry(handle_t *handle,
>  					blocksize);
>  			else
>  				de->inode = 0;
> -			dir->i_version++;
>  			BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
>  			err = ext4_handle_dirty_metadata(handle, dir, bh);
>  			if (unlikely(err)) {
> @@ -2158,13 +2157,14 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
>  		ext4_warning(inode->i_sb,
>  			     "empty directory has too many links (%d)",
>  			     inode->i_nlink);
> -	inode->i_version++;
>  	clear_nlink(inode);
>  	/* There's no need to set i_disksize: the fact that i_nlink is
>  	 * zero will ensure that the right thing happens during any
>  	 * recovery. */
>  	inode->i_size = 0;
>  	ext4_orphan_add(handle, inode);
> +	inode_inc_iversion(inode);
> +	inode_inc_iversion(dir);
>  	inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
>  	ext4_mark_inode_dirty(handle, inode);
>  	ext4_dec_count(handle, dir);
> @@ -2218,12 +2218,14 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
>  	retval = ext4_delete_entry(handle, dir, de, bh);
>  	if (retval)
>  		goto end_unlink;
> +	inode_inc_iversion(dir);
>  	dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
>  	ext4_update_dx_flag(dir);
>  	ext4_mark_inode_dirty(handle, dir);
>  	drop_nlink(inode);
>  	if (!inode->i_nlink)
>  		ext4_orphan_add(handle, inode);
> +	inode_inc_iversion(inode);
>  	inode->i_ctime = ext4_current_time(inode);
>  	ext4_mark_inode_dirty(handle, inode);
>  	retval = 0;
> @@ -2363,6 +2365,7 @@ retry:
>  	if (IS_DIRSYNC(dir))
>  		ext4_handle_sync(handle);
>  
> +	inode_inc_iversion(inode);
>  	inode->i_ctime = ext4_current_time(inode);
>  	ext4_inc_count(handle, inode);
>  	ihold(inode);
> @@ -2470,7 +2473,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>  		if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
>  					      EXT4_FEATURE_INCOMPAT_FILETYPE))
>  			new_de->file_type = old_de->file_type;
> -		new_dir->i_version++;
> +		inode_inc_iversion(new_dir);
>  		new_dir->i_ctime = new_dir->i_mtime =
>  					ext4_current_time(new_dir);
>  		ext4_mark_inode_dirty(handle, new_dir);
> @@ -2488,6 +2491,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>  	 * Like most other Unix systems, set the ctime for inodes on a
>  	 * rename.
>  	 */
> +	inode_inc_iversion(old_inode);
>  	old_inode->i_ctime = ext4_current_time(old_inode);
>  	ext4_mark_inode_dirty(handle, old_inode);
>  
> @@ -2521,8 +2525,10 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>  
>  	if (new_inode) {
>  		ext4_dec_count(handle, new_inode);
> +		inode_inc_iversion(new_inode);
>  		new_inode->i_ctime = ext4_current_time(new_inode);
>  	}
> +	inode_inc_iversion(old_dir);
>  	old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
>  	ext4_update_dx_flag(old_dir);
>  	if (dir_bh) {
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 502c61f..5866d38 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -1813,8 +1813,7 @@ set_qf_format:
>  				 "Ignoring deprecated bh option");
>  			break;
>  		case Opt_i_version:
> -			set_opt(sb, I_VERSION);
> -			sb->s_flags |= MS_I_VERSION;
> +			/* On by default now */
>  			break;
>  		case Opt_nodelalloc:
>  			clear_opt(sb, DELALLOC);
> @@ -3132,6 +3131,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  		goto out_free_orig;
>  	}
>  	sb->s_fs_info = sbi;
> +	sb->s_flags |= MS_I_VERSION;
>  	sbi->s_mount_opt = 0;
>  	sbi->s_resuid = EXT4_DEF_RESUID;
>  	sbi->s_resgid = EXT4_DEF_RESGID;
> @@ -4831,6 +4831,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
>  	handle = ext4_journal_start(inode, 1);
>  	if (IS_ERR(handle))
>  		goto out;
> +	inode_inc_iversion(inode);
>  	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
>  	ext4_mark_inode_dirty(handle, inode);
>  	ext4_journal_stop(handle);
> diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
> index 93a00d8..48a3412 100644
> --- a/fs/ext4/xattr.c
> +++ b/fs/ext4/xattr.c
> @@ -1048,6 +1048,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
>  	}
>  	if (!error) {
>  		ext4_xattr_update_super_block(handle, inode->i_sb);
> +		inode_inc_iversion(inode);
>  		inode->i_ctime = ext4_current_time(inode);
>  		if (!value)
>  			ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
> -- 
> 1.7.7.6
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
-- 
Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>
SUSE Labs, CR
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Re: [PATCH] ext4: fix how i_version is modified and turn it on by default

[Boaz Harrosh]

On 05/15/2012 01:44 AM, Jan Kara wrote:

> On Mon 14-05-12 14:47:19, Josef Bacik wrote:
>> This makes MS_I_VERSION be turned on by default.  Ext4 had been
>> unconditionally doing i_version++ in a few cases anway so the mount option
>> was kind of silly.  This patch also removes the update in mark_inode_dirty
>> and makes all of the cases where we update ctime also do inode_inc_iversion.
>> file_update_time takes care of the write case and all the places where we
>> update iversion are protected by the i_mutex so there should be no extra
>> i_lock overhead in the normal non-exported fs case.  Thanks,
>   Looks OK but it seems slightly fragile (forgetting to update i_version
> when we add a place where we update i_ctime looks rather easy). So maybe we
> should have a small helper like ext4_inode_update_time() which would update
> c/mtime and i_version?
> 
> 								Honza
>  


Exactly my thought. And there is already an helper function - inode_inc_iversion()
But I agree that a name change is appropriate.

Cheers
Boaz

>> Signed-off-by: Josef Bacik <josef@redhat.com>
>> ---
>>  fs/ext4/acl.c      |    1 +
>>  fs/ext4/extents.c  |    3 +++
>>  fs/ext4/indirect.c |    1 +
>>  fs/ext4/inode.c    |    3 ---
>>  fs/ext4/ioctl.c    |    2 ++
>>  fs/ext4/namei.c    |   14 ++++++++++----
>>  fs/ext4/super.c    |    5 +++--
>>  fs/ext4/xattr.c    |    1 +
>>  8 files changed, 21 insertions(+), 9 deletions(-)
>>
>> diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
>> index a5c29bb..fb3ff80 100644
>> --- a/fs/ext4/acl.c
>> +++ b/fs/ext4/acl.c
>> @@ -202,6 +202,7 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
>>  			if (error < 0)
>>  				return error;
>>  			else {
>> +				inode_inc_iversion(inode);
>>  				inode->i_ctime = ext4_current_time(inode);
>>  				ext4_mark_inode_dirty(handle, inode);
>>  				if (error == 0)
>> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
>> index 74f23c2..a9ac029 100644
>> --- a/fs/ext4/extents.c
>> +++ b/fs/ext4/extents.c
>> @@ -4249,6 +4249,7 @@ out_stop:
>>  	if (inode->i_nlink)
>>  		ext4_orphan_del(handle, inode);
>>  
>> +	inode_inc_iversion(inode);
>>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>>  	ext4_mark_inode_dirty(handle, inode);
>>  	ext4_journal_stop(handle);
>> @@ -4261,6 +4262,7 @@ static void ext4_falloc_update_inode(struct inode *inode,
>>  
>>  	if (update_ctime) {
>>  		now = current_fs_time(inode->i_sb);
>> +		inode_inc_iversion(inode);
>>  		if (!timespec_equal(&inode->i_ctime, &now))
>>  			inode->i_ctime = now;
>>  	}
>> @@ -4905,6 +4907,7 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
>>  
>>  out:
>>  	ext4_orphan_del(handle, inode);
>> +	inode_inc_iversion(inode);
>>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>>  	ext4_mark_inode_dirty(handle, inode);
>>  	ext4_journal_stop(handle);
>> diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
>> index 830e1b2..45ed6d4 100644
>> --- a/fs/ext4/indirect.c
>> +++ b/fs/ext4/indirect.c
>> @@ -1476,6 +1476,7 @@ do_indirects:
>>  
>>  out_unlock:
>>  	up_write(&ei->i_data_sem);
>> +	inode_inc_iversion(inode);
>>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>>  	ext4_mark_inode_dirty(handle, inode);
>>  
>> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
>> index feaa82f..d11b4e5 100644
>> --- a/fs/ext4/inode.c
>> +++ b/fs/ext4/inode.c
>> @@ -4314,9 +4314,6 @@ int ext4_mark_iloc_dirty(handle_t *handle,
>>  {
>>  	int err = 0;
>>  
>> -	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);
>>  
>> diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
>> index 6eee255..c79b874 100644
>> --- a/fs/ext4/ioctl.c
>> +++ b/fs/ext4/ioctl.c
>> @@ -120,6 +120,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>>  		ei->i_flags = flags;
>>  
>>  		ext4_set_inode_flags(inode);
>> +		inode_inc_iversion(inode);
>>  		inode->i_ctime = ext4_current_time(inode);
>>  
>>  		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
>> @@ -168,6 +169,7 @@ flags_out:
>>  		}
>>  		err = ext4_reserve_inode_write(handle, inode, &iloc);
>>  		if (err == 0) {
>> +			inode_inc_iversion(inode);
>>  			inode->i_ctime = ext4_current_time(inode);
>>  			inode->i_generation = generation;
>>  			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
>> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
>> index 2043f48..9bb533a 100644
>> --- a/fs/ext4/namei.c
>> +++ b/fs/ext4/namei.c
>> @@ -1316,9 +1316,9 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
>>  	 * happen is that the times are slightly out of date
>>  	 * and/or different from the directory change time.
>>  	 */
>> +	inode_inc_iversion(dir);
>>  	dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
>>  	ext4_update_dx_flag(dir);
>> -	dir->i_version++;
>>  	ext4_mark_inode_dirty(handle, dir);
>>  	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
>>  	err = ext4_handle_dirty_metadata(handle, dir, bh);
>> @@ -1668,7 +1668,6 @@ static int ext4_delete_entry(handle_t *handle,
>>  					blocksize);
>>  			else
>>  				de->inode = 0;
>> -			dir->i_version++;
>>  			BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
>>  			err = ext4_handle_dirty_metadata(handle, dir, bh);
>>  			if (unlikely(err)) {
>> @@ -2158,13 +2157,14 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
>>  		ext4_warning(inode->i_sb,
>>  			     "empty directory has too many links (%d)",
>>  			     inode->i_nlink);
>> -	inode->i_version++;
>>  	clear_nlink(inode);
>>  	/* There's no need to set i_disksize: the fact that i_nlink is
>>  	 * zero will ensure that the right thing happens during any
>>  	 * recovery. */
>>  	inode->i_size = 0;
>>  	ext4_orphan_add(handle, inode);
>> +	inode_inc_iversion(inode);
>> +	inode_inc_iversion(dir);
>>  	inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
>>  	ext4_mark_inode_dirty(handle, inode);
>>  	ext4_dec_count(handle, dir);
>> @@ -2218,12 +2218,14 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
>>  	retval = ext4_delete_entry(handle, dir, de, bh);
>>  	if (retval)
>>  		goto end_unlink;
>> +	inode_inc_iversion(dir);
>>  	dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
>>  	ext4_update_dx_flag(dir);
>>  	ext4_mark_inode_dirty(handle, dir);
>>  	drop_nlink(inode);
>>  	if (!inode->i_nlink)
>>  		ext4_orphan_add(handle, inode);
>> +	inode_inc_iversion(inode);
>>  	inode->i_ctime = ext4_current_time(inode);
>>  	ext4_mark_inode_dirty(handle, inode);
>>  	retval = 0;
>> @@ -2363,6 +2365,7 @@ retry:
>>  	if (IS_DIRSYNC(dir))
>>  		ext4_handle_sync(handle);
>>  
>> +	inode_inc_iversion(inode);
>>  	inode->i_ctime = ext4_current_time(inode);
>>  	ext4_inc_count(handle, inode);
>>  	ihold(inode);
>> @@ -2470,7 +2473,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>>  		if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
>>  					      EXT4_FEATURE_INCOMPAT_FILETYPE))
>>  			new_de->file_type = old_de->file_type;
>> -		new_dir->i_version++;
>> +		inode_inc_iversion(new_dir);
>>  		new_dir->i_ctime = new_dir->i_mtime =
>>  					ext4_current_time(new_dir);
>>  		ext4_mark_inode_dirty(handle, new_dir);
>> @@ -2488,6 +2491,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>>  	 * Like most other Unix systems, set the ctime for inodes on a
>>  	 * rename.
>>  	 */
>> +	inode_inc_iversion(old_inode);
>>  	old_inode->i_ctime = ext4_current_time(old_inode);
>>  	ext4_mark_inode_dirty(handle, old_inode);
>>  
>> @@ -2521,8 +2525,10 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>>  
>>  	if (new_inode) {
>>  		ext4_dec_count(handle, new_inode);
>> +		inode_inc_iversion(new_inode);
>>  		new_inode->i_ctime = ext4_current_time(new_inode);
>>  	}
>> +	inode_inc_iversion(old_dir);
>>  	old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
>>  	ext4_update_dx_flag(old_dir);
>>  	if (dir_bh) {
>> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
>> index 502c61f..5866d38 100644
>> --- a/fs/ext4/super.c
>> +++ b/fs/ext4/super.c
>> @@ -1813,8 +1813,7 @@ set_qf_format:
>>  				 "Ignoring deprecated bh option");
>>  			break;
>>  		case Opt_i_version:
>> -			set_opt(sb, I_VERSION);
>> -			sb->s_flags |= MS_I_VERSION;
>> +			/* On by default now */
>>  			break;
>>  		case Opt_nodelalloc:
>>  			clear_opt(sb, DELALLOC);
>> @@ -3132,6 +3131,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>>  		goto out_free_orig;
>>  	}
>>  	sb->s_fs_info = sbi;
>> +	sb->s_flags |= MS_I_VERSION;
>>  	sbi->s_mount_opt = 0;
>>  	sbi->s_resuid = EXT4_DEF_RESUID;
>>  	sbi->s_resgid = EXT4_DEF_RESGID;
>> @@ -4831,6 +4831,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
>>  	handle = ext4_journal_start(inode, 1);
>>  	if (IS_ERR(handle))
>>  		goto out;
>> +	inode_inc_iversion(inode);
>>  	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
>>  	ext4_mark_inode_dirty(handle, inode);
>>  	ext4_journal_stop(handle);
>> diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
>> index 93a00d8..48a3412 100644
>> --- a/fs/ext4/xattr.c
>> +++ b/fs/ext4/xattr.c
>> @@ -1048,6 +1048,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
>>  	}
>>  	if (!error) {
>>  		ext4_xattr_update_super_block(handle, inode->i_sb);
>> +		inode_inc_iversion(inode);
>>  		inode->i_ctime = ext4_current_time(inode);
>>  		if (!value)
>>  			ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
>> -- 
>> 1.7.7.6
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH] ext4: fix how i_version is modified and turn it on by default

[Boaz Harrosh]

On 05/15/2012 11:03 AM, Boaz Harrosh wrote:

> On 05/15/2012 01:44 AM, Jan Kara wrote:
> 
>> On Mon 14-05-12 14:47:19, Josef Bacik wrote:
>>> This makes MS_I_VERSION be turned on by default.  Ext4 had been
>>> unconditionally doing i_version++ in a few cases anway so the mount option
>>> was kind of silly.  This patch also removes the update in mark_inode_dirty
>>> and makes all of the cases where we update ctime also do inode_inc_iversion.
>>> file_update_time takes care of the write case and all the places where we
>>> update iversion are protected by the i_mutex so there should be no extra
>>> i_lock overhead in the normal non-exported fs case.  Thanks,
>>   Looks OK but it seems slightly fragile (forgetting to update i_version
>> when we add a place where we update i_ctime looks rather easy). So maybe we
>> should have a small helper like ext4_inode_update_time() which would update
>> c/mtime and i_version?
>>
>> 								Honza
>>  
> 
> 
> Exactly my thought. And there is already an helper function - inode_inc_iversion()
> But I agree that a name change is appropriate.
> 


Rrrr, strike that, need that morning coffee now. 

But yes an helper was what I thought as well.

Sorry
Boaz

> Cheers
> Boaz
> 
>>> Signed-off-by: Josef Bacik <josef-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>>> ---
>>>  fs/ext4/acl.c      |    1 +
>>>  fs/ext4/extents.c  |    3 +++
>>>  fs/ext4/indirect.c |    1 +
>>>  fs/ext4/inode.c    |    3 ---
>>>  fs/ext4/ioctl.c    |    2 ++
>>>  fs/ext4/namei.c    |   14 ++++++++++----
>>>  fs/ext4/super.c    |    5 +++--
>>>  fs/ext4/xattr.c    |    1 +
>>>  8 files changed, 21 insertions(+), 9 deletions(-)
>>>
>>> diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
>>> index a5c29bb..fb3ff80 100644
>>> --- a/fs/ext4/acl.c
>>> +++ b/fs/ext4/acl.c
>>> @@ -202,6 +202,7 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
>>>  			if (error < 0)
>>>  				return error;
>>>  			else {
>>> +				inode_inc_iversion(inode);
>>>  				inode->i_ctime = ext4_current_time(inode);
>>>  				ext4_mark_inode_dirty(handle, inode);
>>>  				if (error == 0)
>>> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
>>> index 74f23c2..a9ac029 100644
>>> --- a/fs/ext4/extents.c
>>> +++ b/fs/ext4/extents.c
>>> @@ -4249,6 +4249,7 @@ out_stop:
>>>  	if (inode->i_nlink)
>>>  		ext4_orphan_del(handle, inode);
>>>  
>>> +	inode_inc_iversion(inode);
>>>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>>>  	ext4_mark_inode_dirty(handle, inode);
>>>  	ext4_journal_stop(handle);
>>> @@ -4261,6 +4262,7 @@ static void ext4_falloc_update_inode(struct inode *inode,
>>>  
>>>  	if (update_ctime) {
>>>  		now = current_fs_time(inode->i_sb);
>>> +		inode_inc_iversion(inode);
>>>  		if (!timespec_equal(&inode->i_ctime, &now))
>>>  			inode->i_ctime = now;
>>>  	}
>>> @@ -4905,6 +4907,7 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
>>>  
>>>  out:
>>>  	ext4_orphan_del(handle, inode);
>>> +	inode_inc_iversion(inode);
>>>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>>>  	ext4_mark_inode_dirty(handle, inode);
>>>  	ext4_journal_stop(handle);
>>> diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
>>> index 830e1b2..45ed6d4 100644
>>> --- a/fs/ext4/indirect.c
>>> +++ b/fs/ext4/indirect.c
>>> @@ -1476,6 +1476,7 @@ do_indirects:
>>>  
>>>  out_unlock:
>>>  	up_write(&ei->i_data_sem);
>>> +	inode_inc_iversion(inode);
>>>  	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
>>>  	ext4_mark_inode_dirty(handle, inode);
>>>  
>>> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
>>> index feaa82f..d11b4e5 100644
>>> --- a/fs/ext4/inode.c
>>> +++ b/fs/ext4/inode.c
>>> @@ -4314,9 +4314,6 @@ int ext4_mark_iloc_dirty(handle_t *handle,
>>>  {
>>>  	int err = 0;
>>>  
>>> -	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);
>>>  
>>> diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
>>> index 6eee255..c79b874 100644
>>> --- a/fs/ext4/ioctl.c
>>> +++ b/fs/ext4/ioctl.c
>>> @@ -120,6 +120,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>>>  		ei->i_flags = flags;
>>>  
>>>  		ext4_set_inode_flags(inode);
>>> +		inode_inc_iversion(inode);
>>>  		inode->i_ctime = ext4_current_time(inode);
>>>  
>>>  		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
>>> @@ -168,6 +169,7 @@ flags_out:
>>>  		}
>>>  		err = ext4_reserve_inode_write(handle, inode, &iloc);
>>>  		if (err == 0) {
>>> +			inode_inc_iversion(inode);
>>>  			inode->i_ctime = ext4_current_time(inode);
>>>  			inode->i_generation = generation;
>>>  			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
>>> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
>>> index 2043f48..9bb533a 100644
>>> --- a/fs/ext4/namei.c
>>> +++ b/fs/ext4/namei.c
>>> @@ -1316,9 +1316,9 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
>>>  	 * happen is that the times are slightly out of date
>>>  	 * and/or different from the directory change time.
>>>  	 */
>>> +	inode_inc_iversion(dir);
>>>  	dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
>>>  	ext4_update_dx_flag(dir);
>>> -	dir->i_version++;
>>>  	ext4_mark_inode_dirty(handle, dir);
>>>  	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
>>>  	err = ext4_handle_dirty_metadata(handle, dir, bh);
>>> @@ -1668,7 +1668,6 @@ static int ext4_delete_entry(handle_t *handle,
>>>  					blocksize);
>>>  			else
>>>  				de->inode = 0;
>>> -			dir->i_version++;
>>>  			BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
>>>  			err = ext4_handle_dirty_metadata(handle, dir, bh);
>>>  			if (unlikely(err)) {
>>> @@ -2158,13 +2157,14 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
>>>  		ext4_warning(inode->i_sb,
>>>  			     "empty directory has too many links (%d)",
>>>  			     inode->i_nlink);
>>> -	inode->i_version++;
>>>  	clear_nlink(inode);
>>>  	/* There's no need to set i_disksize: the fact that i_nlink is
>>>  	 * zero will ensure that the right thing happens during any
>>>  	 * recovery. */
>>>  	inode->i_size = 0;
>>>  	ext4_orphan_add(handle, inode);
>>> +	inode_inc_iversion(inode);
>>> +	inode_inc_iversion(dir);
>>>  	inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
>>>  	ext4_mark_inode_dirty(handle, inode);
>>>  	ext4_dec_count(handle, dir);
>>> @@ -2218,12 +2218,14 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
>>>  	retval = ext4_delete_entry(handle, dir, de, bh);
>>>  	if (retval)
>>>  		goto end_unlink;
>>> +	inode_inc_iversion(dir);
>>>  	dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
>>>  	ext4_update_dx_flag(dir);
>>>  	ext4_mark_inode_dirty(handle, dir);
>>>  	drop_nlink(inode);
>>>  	if (!inode->i_nlink)
>>>  		ext4_orphan_add(handle, inode);
>>> +	inode_inc_iversion(inode);
>>>  	inode->i_ctime = ext4_current_time(inode);
>>>  	ext4_mark_inode_dirty(handle, inode);
>>>  	retval = 0;
>>> @@ -2363,6 +2365,7 @@ retry:
>>>  	if (IS_DIRSYNC(dir))
>>>  		ext4_handle_sync(handle);
>>>  
>>> +	inode_inc_iversion(inode);
>>>  	inode->i_ctime = ext4_current_time(inode);
>>>  	ext4_inc_count(handle, inode);
>>>  	ihold(inode);
>>> @@ -2470,7 +2473,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>>>  		if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
>>>  					      EXT4_FEATURE_INCOMPAT_FILETYPE))
>>>  			new_de->file_type = old_de->file_type;
>>> -		new_dir->i_version++;
>>> +		inode_inc_iversion(new_dir);
>>>  		new_dir->i_ctime = new_dir->i_mtime =
>>>  					ext4_current_time(new_dir);
>>>  		ext4_mark_inode_dirty(handle, new_dir);
>>> @@ -2488,6 +2491,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>>>  	 * Like most other Unix systems, set the ctime for inodes on a
>>>  	 * rename.
>>>  	 */
>>> +	inode_inc_iversion(old_inode);
>>>  	old_inode->i_ctime = ext4_current_time(old_inode);
>>>  	ext4_mark_inode_dirty(handle, old_inode);
>>>  
>>> @@ -2521,8 +2525,10 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
>>>  
>>>  	if (new_inode) {
>>>  		ext4_dec_count(handle, new_inode);
>>> +		inode_inc_iversion(new_inode);
>>>  		new_inode->i_ctime = ext4_current_time(new_inode);
>>>  	}
>>> +	inode_inc_iversion(old_dir);
>>>  	old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
>>>  	ext4_update_dx_flag(old_dir);
>>>  	if (dir_bh) {
>>> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
>>> index 502c61f..5866d38 100644
>>> --- a/fs/ext4/super.c
>>> +++ b/fs/ext4/super.c
>>> @@ -1813,8 +1813,7 @@ set_qf_format:
>>>  				 "Ignoring deprecated bh option");
>>>  			break;
>>>  		case Opt_i_version:
>>> -			set_opt(sb, I_VERSION);
>>> -			sb->s_flags |= MS_I_VERSION;
>>> +			/* On by default now */
>>>  			break;
>>>  		case Opt_nodelalloc:
>>>  			clear_opt(sb, DELALLOC);
>>> @@ -3132,6 +3131,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>>>  		goto out_free_orig;
>>>  	}
>>>  	sb->s_fs_info = sbi;
>>> +	sb->s_flags |= MS_I_VERSION;
>>>  	sbi->s_mount_opt = 0;
>>>  	sbi->s_resuid = EXT4_DEF_RESUID;
>>>  	sbi->s_resgid = EXT4_DEF_RESGID;
>>> @@ -4831,6 +4831,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
>>>  	handle = ext4_journal_start(inode, 1);
>>>  	if (IS_ERR(handle))
>>>  		goto out;
>>> +	inode_inc_iversion(inode);
>>>  	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
>>>  	ext4_mark_inode_dirty(handle, inode);
>>>  	ext4_journal_stop(handle);
>>> diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
>>> index 93a00d8..48a3412 100644
>>> --- a/fs/ext4/xattr.c
>>> +++ b/fs/ext4/xattr.c
>>> @@ -1048,6 +1048,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
>>>  	}
>>>  	if (!error) {
>>>  		ext4_xattr_update_super_block(handle, inode->i_sb);
>>> +		inode_inc_iversion(inode);
>>>  		inode->i_ctime = ext4_current_time(inode);
>>>  		if (!value)
>>>  			ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
>>> -- 
>>> 1.7.7.6
>>>
>>> --
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