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Re: [PATCH 06/13] xfs_repair: add XR_DIR_TRACE to dir2.c

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: [PATCH 06/13] xfs_repair: add XR_DIR_TRACE to dir2.c
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Mon, 14 Sep 2015 15:18:25 -0400
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1441827251-13128-7-git-send-email-sandeen@xxxxxxxxxxx>
References: <1441827251-13128-1-git-send-email-sandeen@xxxxxxxxxxx> <1441827251-13128-7-git-send-email-sandeen@xxxxxxxxxxx>
User-agent: Mutt/1.5.23 (2014-03-12)
On Wed, Sep 09, 2015 at 02:34:04PM -0500, Eric Sandeen wrote:
> attr_repair.c has many printf-tracepoints under
> #ifdef XR_DIR_TRACE, but the similar code in dir2.c does not.
> 
> Add these same tracepoints to remove more differences between
> these two pieces of code.
> 
> Not all messages are quite correct; those will be fixed up last.
> For now we just make the code more obviously similar.
> 
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxxx>
> ---

Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>

>  repair/dir2.c |   39 ++++++++++++++++++++++++++++++++++++---
>  1 files changed, 36 insertions(+), 3 deletions(-)
> 
> diff --git a/repair/dir2.c b/repair/dir2.c
> index 898b27e..d9bd5fc 100644
> --- a/repair/dir2.c
> +++ b/repair/dir2.c
> @@ -337,6 +337,11 @@ verify_final_dir2_path(xfs_mount_t       *mp,
>       struct xfs_da_node_entry *btree;
>       struct xfs_da3_icnode_hdr nodehdr;
>  
> +#ifdef XR_DIR_TRACE
> +     fprintf(stderr, "in verify_final_dir2_path, this_level = %d\n",
> +             this_level);
> +#endif
> +
>       /*
>        * the index should point to the next "unprocessed" entry
>        * in the block which should be the final (rightmost) entry
> @@ -388,8 +393,17 @@ verify_final_dir2_path(xfs_mount_t       *mp,
>       /*
>        * ok, now check descendant block number against this level
>        */
> -     if (cursor->level[p_level].bno != be32_to_cpu(btree[entry].before))
> +     if (cursor->level[p_level].bno != be32_to_cpu(btree[entry].before)) {
> +#ifdef XR_DIR_TRACE
> +             fprintf(stderr, "bad directory btree pointer, child bno should "
> +                             "be %d, block bno is %d, hashval is %u\n",
> +                     be16_to_cpu(btree[entry].before),
> +                     cursor->level[p_level].bno,
> +                     cursor->level[p_level].hashval);
> +             fprintf(stderr, "verify_final_dir2_path returns 1 (bad) #1a\n");
> +#endif
>               return(1);
> +     }
>  
>       if (cursor->level[p_level].hashval !=
>                               be32_to_cpu(btree[entry].hashval))  {
> @@ -431,8 +445,12 @@ _("would correct bad hashval in non-leaf dir block\n"
>       /*
>        * bail out if this is the root block (top of tree)
>        */
> -     if (this_level >= cursor->active)
> +     if (this_level >= cursor->active) {
> +#ifdef XR_DIR_TRACE
> +             fprintf(stderr, "verify_final_dir2_path returns 0 (ok)\n");
> +#endif
>               return(0);
> +     }
>       /*
>        * set hashvalue to correctl reflect the now-validated
>        * last entry in this block and continue upwards validation
> @@ -600,6 +618,9 @@ _("bad level %d in block %u for directory inode %" PRIu64 
> "\n"),
>                       bad++;
>               }
>               if (bad)  {
> +#ifdef XR_DIR_TRACE
> +                     fprintf(stderr, "verify_dir2_path returns 1 (bad) 
> #4\n");
> +#endif
>                       libxfs_putbuf(bp);
>                       return(1);
>               }
> @@ -631,8 +652,17 @@ _("bad level %d in block %u for directory inode %" 
> PRIu64 "\n"),
>       /*
>        * ditto for block numbers
>        */
> -     if (cursor->level[p_level].bno != be32_to_cpu(btree[entry].before))
> +     if (cursor->level[p_level].bno != be32_to_cpu(btree[entry].before)) {
> +#ifdef XR_DIR_TRACE
> +             fprintf(stderr, "bad directory btree pointer, child bno "
> +                     "should be %d, block bno is %d, hashval is %u\n",
> +                     be32_to_cpu(btree[entry].before),
> +                     cursor->level[p_level].bno,
> +                     cursor->level[p_level].hashval);
> +             fprintf(stderr, "verify_dir2_path returns 1 (bad) #1a\n");
> +#endif
>               return(1);
> +     }
>       /*
>        * ok, now validate last hashvalue in the descendant
>        * block against the hashval in the current entry
> @@ -659,6 +689,9 @@ _("would correct bad hashval in interior dir block\n"
>        * (which should point to the next descendant block)
>        */
>       cursor->level[this_level].index++;
> +#ifdef XR_DIR_TRACE
> +       fprintf(stderr, "verify_dir2_path returns 0 (ok)\n");
> +#endif
>       return(0);
>  }
>  
> -- 
> 1.7.1
> 
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