linux-ext4 - Re: [EXT4 set 4][PATCH 4/5] i_version:ext4 inode version update

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Date:	Tue, 03 Jul 2007 23:31:28 -0400
From:	Mingming Cao <cmm@...ibm.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [EXT4 set 4][PATCH 4/5] i_version:ext4 inode version update

On Wed, 2007-07-04 at 10:56 +0530, Aneesh Kumar K.V wrote:
> 
> Aneesh Kumar K.V wrote:
> 
> > 
> > If we bump i_version  in ext4_mark_iloc_dity then we should be removing 
> > the i_version update
> > at other places. A simple grep of ext4 dir shows i_version being updated 
> > followed by ext4_mark_inode_dirty.
> > 
> > 
> 
> How about the below patch. I also removed the i_version = 1 from 
> ext4_new_inode because we do the same in ext4_alloc_inode. I also added
> the From:  line. 
> 

Acked.

Ha, I actually just finished on a incremental patch to cleanup redundant
i_version update.:) But I missed the ext4_new_inode().

Thanks. I will replace this patch in the ext4 patch queue


> -aneesh
> 
> From ccdfc4a6a8edbdbf5d21d32fd2350f36399a89f8 Mon Sep 17 00:00:00 2001
> From: Jean Noel Cordenner <jean-noel.cordenner@...l.net>
> Date: Wed, 4 Jul 2007 10:51:50 +0530
> Subject: [PATCH] This patch is on top of i_version_update_vfs.
>  The i_version field of the inode is set on inode creation and incremented when
>  the inode is being modified.
> 
> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@...l.net>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> Signed-off-by: Mingming Cao <cmm@...ibm.com>
> ---
>  fs/ext4/inode.c |    1 +
>  fs/ext4/namei.c |    4 ----
>  fs/ext4/super.c |    1 -
>  3 files changed, 1 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index cb9f1f4..cd3e886 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -3084,6 +3084,7 @@ int ext4_mark_iloc_dirty(handle_t *handle,
>  {
>  	int err = 0;
> 
> +	inode->i_version++;
>  	/* the do_update_inode consumes one bh->b_count */
>  	get_bh(iloc->bh);
> 
> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
> index 477b6d2..a1dc5ef 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -1287,7 +1287,6 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
>  	 */
>  	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_journal_dirty_metadata");
>  	err = ext4_journal_dirty_metadata(handle, bh);
> @@ -1606,7 +1605,6 @@ static int ext4_delete_entry (handle_t *handle,
>  						    le16_to_cpu(de->rec_len));
>  			else
>  				de->inode = 0;
> -			dir->i_version++;
>  			BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
>  			ext4_journal_dirty_metadata(handle, bh);
>  			return 0;
> @@ -2039,7 +2037,6 @@ static int ext4_rmdir (struct inode * dir, struct dentry *dentry)
>  		ext4_warning (inode->i_sb, "ext4_rmdir",
>  			      "empty directory has nlink!=2 (%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
> @@ -2284,7 +2281,6 @@ 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++;
>  		BUFFER_TRACE(new_bh, "call ext4_journal_dirty_metadata");
>  		ext4_journal_dirty_metadata(handle, new_bh);
>  		brelse(new_bh);
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 914c273..55b99b3 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -2846,7 +2846,6 @@ out:
>  		i_size_write(inode, off+len-towrite);
>  		EXT4_I(inode)->i_disksize = inode->i_size;
>  	}
> -	inode->i_version++;
>  	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
>  	ext4_mark_inode_dirty(handle, inode);
>  	mutex_unlock(&inode->i_mutex);

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