Re: [PATCH] xfs_repair: warn about dirty log with -n option

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On Wed, Mar 15, 2017 at 01:32:34PM -0500, Eric Sandeen wrote:
> When looking at xfs_repair -n output today, we have no idea if
> reported errors may be due to an un-replayed dirty log.  If this
> is the case, mention it in the output.
> 
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

--D

> ---
> 
> pls check double-check my logic for the 3 cases :)
> 
> diff --git a/repair/phase2.c b/repair/phase2.c
> index 5964244..c21778b 100644
> --- a/repair/phase2.c
> +++ b/repair/phase2.c
> @@ -90,11 +90,16 @@ zero_log(
>  	_("zero_log: head block %" PRId64 " tail block %" PRId64 "\n"),
>  				head_blk, tail_blk);
>  		}
> -		if (!no_modify && head_blk != tail_blk) {
> -			if (zap_log) {
> +		if (head_blk != tail_blk) {
> +			if (!no_modify && zap_log) {
>  				do_warn(_(
>  "ALERT: The filesystem has valuable metadata changes in a log which is being\n"
>  "destroyed because the -L option was used.\n"));
> +			} else if (no_modify) {
> +				do_warn(_(
> +"ALERT: The filesystem has valuable metadata changes in a log which is being\n"
> +"ignored because the -n option was used.  Expect spurious inconsistencies\n"
> +"which may be resolved by first mounting the filesystem to replay the log.\n"));
>  			} else {
>  				do_warn(_(
>  "ERROR: The filesystem has valuable metadata changes in a log which needs to\n"
> 
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