linux-ext4 - Re: [PATCH 1/2] ext4: journal all modifications in ext4_xattr_set

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Message-id: <A7C68A34-99A5-4476-8545-10FA95E32EAD@sun.com>
Date:	Fri, 06 Nov 2009 17:18:28 -0700
From:	Andreas Dilger <adilger@....com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 1/2] ext4: journal all modifications in
 ext4_xattr_set_handle

On 2009-11-06, at 15:29, Eric Sandeen wrote:
> ext4_xattr_set_handle() was modifying s_inode_size outside
> of journaling constraints; this is one of the accesses that
> was causing the crc errors in journal replay as seen in
> kernel.org bugzilla #14354.

Is this description accurate?  It doesn't seem to be modifying  
s_inode_size, per-se, but rather zeroing the whole inode if it is a  
new inode that was never read from disk.

Other than the above description the patch looks correct.

Reviewed-by: Andreas Dilger <adilger@....com>

> @@ -988,6 +988,10 @@ ext4_xattr_set_handle(handle_t *handle, struct  
> inode *inode, int name_index,
> 	if (error)
> 		goto cleanup;
> +	error = ext4_journal_get_write_access(handle, is.iloc.bh);
> +	if (error)
> +		goto cleanup;
> +
> 	if (EXT4_I(inode)->i_state & EXT4_STATE_NEW) {
> 		struct ext4_inode *raw_inode = ext4_raw_inode(&is.iloc);
> 		memset(raw_inode, 0, EXT4_SB(inode->i_sb)->s_inode_size);
> @@ -1013,9 +1017,6 @@ ext4_xattr_set_handle(handle_t *handle, struct  
> inode *inode, int name_index,
> 		if (flags & XATTR_CREATE)
> 			goto cleanup;
> 	}
> -	error = ext4_journal_get_write_access(handle, is.iloc.bh);
> -	if (error)
> -		goto cleanup;
> 	if (!value) {
> 		if (!is.s.not_found)
> 			error = ext4_xattr_ibody_set(handle, inode, &i, &is);
>
> --
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Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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