[lustre-devel] [PATCH 021/151] lustre: llog: consolidate common error checking

[NeilBrown]

On Mon, Sep 30 2019, James Simmons wrote:

> From: Andreas Dilger <adilger at whamcloud.com>
>
> Consolidate error checking for corrupted and empty llog files
> detected when the llog file is being opened into a single
> routine llog_cat_process_common().
>
> WC-bug-id: https://jira.whamcloud.com/browse/LU-9153
> Lustre-commit: b522f7b4b1de ("LU-9153 llog: consolidate common error checking")
> Signed-off-by: Andreas Dilger <adilger at whamcloud.com>
> Reviewed-on: https://review.whamcloud.com/26211
> Reviewed-by: Faccini Bruno <bruno.faccini at intel.com>
> Reviewed-by: Mike Pershin <mpershin at whamcloud.com>
> Reviewed-by: Oleg Drokin <green at whamcloud.com>
> Signed-off-by: James Simmons <jsimmons at infradead.org>
> ---
>  fs/lustre/obdclass/llog_cat.c | 48 ++++++++++++++++++++++++++++++++-----------
>  1 file changed, 36 insertions(+), 12 deletions(-)
>
> diff --git a/fs/lustre/obdclass/llog_cat.c b/fs/lustre/obdclass/llog_cat.c
> index b61c858..4536f54 100644
> --- a/fs/lustre/obdclass/llog_cat.c
> +++ b/fs/lustre/obdclass/llog_cat.c
> @@ -140,32 +140,55 @@ int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
>  }
>  EXPORT_SYMBOL(llog_cat_close);
>  
> -static int llog_cat_process_cb(const struct lu_env *env,
> -			       struct llog_handle *cat_llh,
> -			       struct llog_rec_hdr *rec, void *data)
> +static int llog_cat_process_common(const struct lu_env *env,
> +				   struct llog_handle *cat_llh,
> +				   struct llog_rec_hdr *rec,
> +				   struct llog_handle **llhp)
>  {
> -	struct llog_process_data *d = data;
> -	struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
> -	struct llog_handle *llh;
> +	struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
>  	int rc;
>  
> -	if (rec->lrh_type != LLOG_LOGID_MAGIC) {
> +	if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
> +		rc = -EINVAL;
> +		CWARN("%s: invalid record in catalog " DFID ":%x: rc = %d\n",
> +		      cat_llh->lgh_ctxt->loc_obd->obd_name,
> +		      PFID(&cat_llh->lgh_id.lgl_oi.oi_fid),
> +		      cat_llh->lgh_id.lgl_ogen, rc);
> +
>  		CERROR("invalid record in catalog\n");

You've got an extra 'invalid record in catalog' here.
The original deleted this.


>  		return -EINVAL;

And this is "RETURN(rc);" in the original..

Thanks,
NeilBrown


>  	}
>  	CDEBUG(D_HA,
>  	       "processing log " DFID ":%x at index %u of catalog " DFID "\n",
>  	       PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
> -	       rec->lrh_index, PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
> +	       le32_to_cpu(rec->lrh_index),
> +	       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
>  
> -	rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
> +	rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
>  	if (rc) {
> -		CERROR("%s: cannot find handle for llog " DFID ": %d\n",
> -		       cat_llh->lgh_ctxt->loc_obd->obd_name,
> -		       PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
> +		CWARN("%s: can't find llog handle " DFID ":%x: rc = %d\n",
> +		      cat_llh->lgh_ctxt->loc_obd->obd_name,
> +		      PFID(&lir->lid_id.lgl_oi.oi_fid),
> +		      lir->lid_id.lgl_ogen, rc);
> +
>  		return rc;
>  	}
>  
> +	return rc;
> +}
> +
> +static int llog_cat_process_cb(const struct lu_env *env,
> +			       struct llog_handle *cat_llh,
> +			       struct llog_rec_hdr *rec, void *data)
> +{
> +	struct llog_process_data *d = data;
> +	struct llog_handle *llh = NULL;
> +	int rc;
> +
> +	rc = llog_cat_process_common(env, cat_llh, rec, &llh);
> +	if (rc)
> +		goto out;
> +
>  	if (rec->lrh_index < d->lpd_startcat)
>  		/* Skip processing of the logs until startcat */
>  		rc = 0;
> @@ -183,6 +206,7 @@ static int llog_cat_process_cb(const struct lu_env *env,
>  					  NULL, false);
>  	}
>  
> +out:
>  	llog_handle_put(llh);
>  
>  	return rc;
> -- 
> 1.8.3.1
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