linux-ext4 - Re: [PATCH 29/54] e2fsck: Check extended attribute block checksums

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Date:	Sat, 10 Mar 2012 00:22:31 -0500
From:	Ted Ts'o <tytso@....edu>
To:	"Darrick J. Wong" <djwong@...ibm.com>
Cc:	Andreas Dilger <adilger.kernel@...ger.ca>,
	Sunil Mushran <sunil.mushran@...cle.com>,
	Amir Goldstein <amir73il@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Mingming Cao <cmm@...ibm.com>,
	Joel Becker <jlbec@...lplan.org>, linux-ext4@...r.kernel.org,
	Coly Li <colyli@...il.com>
Subject: Re: [PATCH 29/54] e2fsck: Check extended attribute block checksums

On Tue, Mar 06, 2012 at 04:00:32PM -0800, Darrick J. Wong wrote:
> diff --git a/e2fsck/problem.c b/e2fsck/problem.c
> index d910629..ad6887e 100644
> --- a/e2fsck/problem.c
> +++ b/e2fsck/problem.c
> @@ -961,6 +961,21 @@ static struct e2fsck_problem problem_table[] = {
>  	     "extent\n\t(logical @b %c, @n physical @b %b, len %N)\n"),
>  	  PROMPT_FIX, 0 },
>  
> +	/* Extended attribute block checksum for inode does not match. */
> +	{ PR_1_EA_BLOCK_CSUM_INVALID,
> +	  N_("Extended attribute @a @b %b checksum for @i %i does not "
> +	     "match.  "),
> +	  PROMPT_CLEAR, 0 },
> +
> +	/*
> +	 * Extended attribute block passes checks, but checksum for inode does
> +	 * not match.
> +	 */
> +	{ PR_1_EA_BLOCK_CSUM_INVALID,
          ^^^^^^^^^^^^^^^^^^^^^^^^^^

This should be PR_1_EA_BLOCK_ONLY_CSUM_INVALID.  This was discovered
again via the tst_problem unit test in the e2fsprogs regression test
suite:

LD_LIBRARY_PATH=../lib DYLD_LIBRARY_PATH=../lib ./tst_problem
*** Duplicate in problem table:
curr code = 0x0001006a: Extended attribute @a @b %b passes checks, but checksum for @i %i does not match.  
*** prev code = 0x0001006a: Extended attribute @a @b %b checksum for @i %i does not match.  
*** This is a fatal programming error in e2fsck

    	      	    		      	 - Ted
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