Re: [PATCH v2 09/15] xfs: disambiguate units for ftrace fields tagged "len"

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On Wed, Aug 18, 2021 at 08:44:52PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@xxxxxxxxxx>
> 
> Some of our tracepoints have a field known as "len".  That name doesn't
> describe any units, which makes the fields not very useful.  Rename the
> fields to capture units and ensure the format is hexadecimal.
> 
> "fsbcount" are in units of fs blocks
> "bbcount" are in units of 512b blocks
> "ireccount" are in units of inodes
> 
> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
> v2: change the prefixes of the unit counts
> ---

Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>

>  fs/xfs/scrub/trace.h |    8 +++---
>  fs/xfs/xfs_trace.h   |   66 +++++++++++++++++++++++++++-----------------------
>  2 files changed, 39 insertions(+), 35 deletions(-)
> 
> diff --git a/fs/xfs/scrub/trace.h b/fs/xfs/scrub/trace.h
> index 5a57fea014f9..eb29f56dc9f1 100644
> --- a/fs/xfs/scrub/trace.h
> +++ b/fs/xfs/scrub/trace.h
> @@ -572,7 +572,7 @@ TRACE_EVENT(xchk_iallocbt_check_cluster,
>  		__entry->holemask = holemask;
>  		__entry->cluster_ino = cluster_ino;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x startino 0x%x daddr 0x%llx len %d chunkino 0x%x nr_inodes %u cluster_mask 0x%x holemask 0x%x cluster_ino 0x%x",
> +	TP_printk("dev %d:%d agno 0x%x startino 0x%x daddr 0x%llx bbcount 0x%x chunkino 0x%x nr_inodes %u cluster_mask 0x%x holemask 0x%x cluster_ino 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->startino,
> @@ -662,7 +662,7 @@ DECLARE_EVENT_CLASS(xrep_extent_class,
>  		__entry->agbno = agbno;
>  		__entry->len = len;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -699,7 +699,7 @@ DECLARE_EVENT_CLASS(xrep_rmap_class,
>  		__entry->offset = offset;
>  		__entry->flags = flags;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u owner 0x%llx fileoff 0x%llx flags 0x%x",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x owner 0x%llx fileoff 0x%llx flags 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -737,7 +737,7 @@ TRACE_EVENT(xrep_refcount_extent_fn,
>  		__entry->blockcount = irec->rc_blockcount;
>  		__entry->refcount = irec->rc_refcount;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u refcount %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x refcount %u",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->startblock,
> diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
> index 60837ff297bc..4169dc6cb5b9 100644
> --- a/fs/xfs/xfs_trace.h
> +++ b/fs/xfs/xfs_trace.h
> @@ -1440,7 +1440,7 @@ DECLARE_EVENT_CLASS(xfs_imap_class,
>  		__entry->blockcount = irec ? irec->br_blockcount : 0;
>  	),
>  	TP_printk("dev %d:%d ino 0x%llx size 0x%llx pos 0x%llx count %zd "
> -		  "fork %s startoff 0x%llx startblock 0x%llx blockcount 0x%llx",
> +		  "fork %s startoff 0x%llx startblock 0x%llx fsbcount 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->size,
> @@ -1579,7 +1579,7 @@ TRACE_EVENT(xfs_bunmap,
>  		__entry->caller_ip = caller_ip;
>  		__entry->flags = flags;
>  	),
> -	TP_printk("dev %d:%d ino 0x%llx size 0x%llx fileoff 0x%llx len 0x%llx"
> +	TP_printk("dev %d:%d ino 0x%llx size 0x%llx fileoff 0x%llx fsbcount 0x%llx"
>  		  "flags %s caller %pS",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
> @@ -1607,7 +1607,7 @@ DECLARE_EVENT_CLASS(xfs_extent_busy_class,
>  		__entry->agbno = agbno;
>  		__entry->len = len;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -1645,7 +1645,7 @@ TRACE_EVENT(xfs_extent_busy_trim,
>  		__entry->tbno = tbno;
>  		__entry->tlen = tlen;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u found_agbno 0x%x tlen %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x found_agbno 0x%x found_fsbcount 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -1741,7 +1741,7 @@ TRACE_EVENT(xfs_free_extent,
>  		__entry->haveleft = haveleft;
>  		__entry->haveright = haveright;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u resv %d %s",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x resv %d %s",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -1876,7 +1876,7 @@ TRACE_EVENT(xfs_alloc_cur_check,
>  		__entry->diff = diff;
>  		__entry->new = new;
>  	),
> -	TP_printk("dev %d:%d btree %s agbno 0x%x len 0x%x diff 0x%x new %d",
> +	TP_printk("dev %d:%d btree %s agbno 0x%x fsbcount 0x%x diff 0x%x new %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __print_symbolic(__entry->btnum, XFS_BTNUM_STRINGS),
>  		  __entry->bno, __entry->len, __entry->diff, __entry->new)
> @@ -2277,7 +2277,7 @@ DECLARE_EVENT_CLASS(xfs_log_recover_buf_item_class,
>  		__entry->size = buf_f->blf_size;
>  		__entry->map_size = buf_f->blf_map_size;
>  	),
> -	TP_printk("dev %d:%d daddr 0x%llx, len %u, flags 0x%x, size %d, "
> +	TP_printk("dev %d:%d daddr 0x%llx, bbcount 0x%x, flags 0x%x, size %d, "
>  			"map_size %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->blkno,
> @@ -2328,7 +2328,7 @@ DECLARE_EVENT_CLASS(xfs_log_recover_ino_item_class,
>  		__entry->boffset = in_f->ilf_boffset;
>  	),
>  	TP_printk("dev %d:%d ino 0x%llx, size %u, fields 0x%x, asize %d, "
> -			"dsize %d, daddr 0x%llx, len %d, boffset %d",
> +			"dsize %d, daddr 0x%llx, bbcount 0x%x, boffset %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->size,
> @@ -2369,10 +2369,14 @@ DECLARE_EVENT_CLASS(xfs_log_recover_icreate_item_class,
>  		__entry->length = be32_to_cpu(in_f->icl_length);
>  		__entry->gen = be32_to_cpu(in_f->icl_gen);
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x count %u isize %u length %u "
> -		  "gen %u", MAJOR(__entry->dev), MINOR(__entry->dev),
> -		  __entry->agno, __entry->agbno, __entry->count, __entry->isize,
> -		  __entry->length, __entry->gen)
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x ireccount 0x%x isize %u gen %u",
> +		  MAJOR(__entry->dev), MINOR(__entry->dev),
> +		  __entry->agno,
> +		  __entry->agbno,
> +		  __entry->length,
> +		  __entry->count,
> +		  __entry->isize,
> +		  __entry->gen)
>  )
>  #define DEFINE_LOG_RECOVER_ICREATE_ITEM(name) \
>  DEFINE_EVENT(xfs_log_recover_icreate_item_class, name, \
> @@ -2398,7 +2402,7 @@ DECLARE_EVENT_CLASS(xfs_discard_class,
>  		__entry->agbno = agbno;
>  		__entry->len = len;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -2557,7 +2561,7 @@ DECLARE_EVENT_CLASS(xfs_phys_extent_deferred_class,
>  		__entry->agbno = agbno;
>  		__entry->len = len;
>  	),
> -	TP_printk("dev %d:%d op %d agno 0x%x agbno 0x%x len %u",
> +	TP_printk("dev %d:%d op %d agno 0x%x agbno 0x%x fsbcount 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->type,
>  		  __entry->agno,
> @@ -2604,7 +2608,7 @@ DECLARE_EVENT_CLASS(xfs_map_extent_deferred_class,
>  		__entry->l_state = state;
>  		__entry->op = op;
>  	),
> -	TP_printk("dev %d:%d op %d agno 0x%x agbno 0x%x owner 0x%llx %s fileoff 0x%llx len %llu state %d",
> +	TP_printk("dev %d:%d op %d agno 0x%x agbno 0x%x owner 0x%llx %s fileoff 0x%llx fsbcount 0x%llx state %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->op,
>  		  __entry->agno,
> @@ -2674,7 +2678,7 @@ DECLARE_EVENT_CLASS(xfs_rmap_class,
>  		if (unwritten)
>  			__entry->flags |= XFS_RMAP_UNWRITTEN;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u owner 0x%llx fileoff 0x%llx flags 0x%lx",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x owner 0x%llx fileoff 0x%llx flags 0x%lx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -2754,7 +2758,7 @@ DECLARE_EVENT_CLASS(xfs_rmapbt_class,
>  		__entry->offset = offset;
>  		__entry->flags = flags;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u owner 0x%llx fileoff 0x%llx flags 0x%x",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x owner 0x%llx fileoff 0x%llx flags 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->agbno,
> @@ -2909,7 +2913,7 @@ DECLARE_EVENT_CLASS(xfs_refcount_extent_class,
>  		__entry->blockcount = irec->rc_blockcount;
>  		__entry->refcount = irec->rc_refcount;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u refcount %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x refcount %u",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->startblock,
> @@ -2944,7 +2948,7 @@ DECLARE_EVENT_CLASS(xfs_refcount_extent_at_class,
>  		__entry->refcount = irec->rc_refcount;
>  		__entry->agbno = agbno;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u refcount %u @ agbno 0x%x",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x refcount %u @ agbno 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->startblock,
> @@ -2984,8 +2988,8 @@ DECLARE_EVENT_CLASS(xfs_refcount_double_extent_class,
>  		__entry->i2_blockcount = i2->rc_blockcount;
>  		__entry->i2_refcount = i2->rc_refcount;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u refcount %u -- "
> -		  "agbno 0x%x len %u refcount %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x refcount %u -- "
> +		  "agbno 0x%x fsbcount 0x%x refcount %u",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->i1_startblock,
> @@ -3030,8 +3034,8 @@ DECLARE_EVENT_CLASS(xfs_refcount_double_extent_at_class,
>  		__entry->i2_refcount = i2->rc_refcount;
>  		__entry->agbno = agbno;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u refcount %u -- "
> -		  "agbno 0x%x len %u refcount %u @ agbno 0x%x",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x refcount %u -- "
> +		  "agbno 0x%x fsbcount 0x%x refcount %u @ agbno 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->i1_startblock,
> @@ -3082,9 +3086,9 @@ DECLARE_EVENT_CLASS(xfs_refcount_triple_extent_class,
>  		__entry->i3_blockcount = i3->rc_blockcount;
>  		__entry->i3_refcount = i3->rc_refcount;
>  	),
> -	TP_printk("dev %d:%d agno 0x%x agbno 0x%x len %u refcount %u -- "
> -		  "agbno 0x%x len %u refcount %u -- "
> -		  "agbno 0x%x len %u refcount %u",
> +	TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x refcount %u -- "
> +		  "agbno 0x%x fsbcount 0x%x refcount %u -- "
> +		  "agbno 0x%x fsbcount 0x%x refcount %u",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->agno,
>  		  __entry->i1_startblock,
> @@ -3171,7 +3175,7 @@ TRACE_EVENT(xfs_refcount_finish_one_leftover,
>  		__entry->new_agbno = new_agbno;
>  		__entry->new_len = new_len;
>  	),
> -	TP_printk("dev %d:%d type %d agno 0x%x agbno 0x%x len %u new_agbno 0x%x new_len %u",
> +	TP_printk("dev %d:%d type %d agno 0x%x agbno 0x%x fsbcount 0x%x new_agbno 0x%x new_fsbcount 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->type,
>  		  __entry->agno,
> @@ -3282,7 +3286,7 @@ DECLARE_EVENT_CLASS(xfs_inode_irec_class,
>  		__entry->pblk = irec->br_startblock;
>  		__entry->state = irec->br_state;
>  	),
> -	TP_printk("dev %d:%d ino 0x%llx fileoff 0x%llx len 0x%x startblock 0x%llx st %d",
> +	TP_printk("dev %d:%d ino 0x%llx fileoff 0x%llx fsbcount 0x%x startblock 0x%llx st %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->lblk,
> @@ -3322,7 +3326,7 @@ TRACE_EVENT(xfs_reflink_remap_blocks,
>  		__entry->dest_ino = dest->i_ino;
>  		__entry->dest_lblk = doffset;
>  	),
> -	TP_printk("dev %d:%d len 0x%llx "
> +	TP_printk("dev %d:%d fsbcount 0x%llx "
>  		  "ino 0x%llx fileoff 0x%llx -> ino 0x%llx fileoff 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->len,
> @@ -3422,7 +3426,7 @@ DECLARE_EVENT_CLASS(xfs_fsmap_class,
>  		__entry->offset = rmap->rm_offset;
>  		__entry->flags = rmap->rm_flags;
>  	),
> -	TP_printk("dev %d:%d keydev %d:%d agno 0x%x startblock 0x%llx len %llu owner 0x%llx fileoff 0x%llx flags 0x%x",
> +	TP_printk("dev %d:%d keydev %d:%d agno 0x%x startblock 0x%llx fsbcount 0x%llx owner 0x%llx fileoff 0x%llx flags 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  MAJOR(__entry->keydev), MINOR(__entry->keydev),
>  		  __entry->agno,
> @@ -3462,7 +3466,7 @@ DECLARE_EVENT_CLASS(xfs_getfsmap_class,
>  		__entry->offset = fsmap->fmr_offset;
>  		__entry->flags = fsmap->fmr_flags;
>  	),
> -	TP_printk("dev %d:%d keydev %d:%d daddr 0x%llx len %llu owner 0x%llx fileoff_daddr 0x%llx flags 0x%llx",
> +	TP_printk("dev %d:%d keydev %d:%d daddr 0x%llx bbcount 0x%llx owner 0x%llx fileoff_daddr 0x%llx flags 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  MAJOR(__entry->keydev), MINOR(__entry->keydev),
>  		  __entry->block,
> 

-- 
Carlos




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