Re: [PATCH 07/15] xfs: disambiguate units for ftrace fields tagged "blkno", "block", or "bno"

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On Tue, Aug 17, 2021 at 04:42:50PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@xxxxxxxxxx>
> 
> Some of our tracepoints describe fields as "blkno", "block", or "bno".
> 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.
> 
> "startblock" is the startblock field from the bmap structure, which is a
> segmented fsblock on the data device, or an rfsblock on the realtime
> device.
> "fileoff" is a file offset, in units of filesystem blocks
> "daddr" is a raw device offset, in 512b blocks
> 

Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>

> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
>  fs/xfs/xfs_trace.h |   26 +++++++++++++-------------
>  1 file changed, 13 insertions(+), 13 deletions(-)
> 
> 
> diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
> index 3944373ad2f6..d725bc4bd1e7 100644
> --- a/fs/xfs/xfs_trace.h
> +++ b/fs/xfs/xfs_trace.h
> @@ -346,7 +346,7 @@ DECLARE_EVENT_CLASS(xfs_bmap_class,
>  		__entry->caller_ip = caller_ip;
>  	),
>  	TP_printk("dev %d:%d ino 0x%llx state %s cur %p/%d "
> -		  "offset %lld block %lld count %lld flag %d caller %pS",
> +		  "offset %lld startblock 0x%llx count %lld flag %d caller %pS",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __print_flags(__entry->bmap_state, "|", XFS_BMAP_EXT_FLAGS),
> @@ -1434,7 +1434,7 @@ DECLARE_EVENT_CLASS(xfs_imap_class,
>  		__entry->blockcount = irec ? irec->br_blockcount : 0;
>  	),
>  	TP_printk("dev %d:%d ino 0x%llx size 0x%llx offset 0x%llx count %zd "
> -		  "fork %s startoff 0x%llx startblock %lld blockcount 0x%llx",
> +		  "fork %s startoff 0x%llx startblock 0x%llx blockcount 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->size,
> @@ -1552,14 +1552,14 @@ TRACE_EVENT(xfs_pagecache_inval,
>  );
>  
>  TRACE_EVENT(xfs_bunmap,
> -	TP_PROTO(struct xfs_inode *ip, xfs_fileoff_t bno, xfs_filblks_t len,
> +	TP_PROTO(struct xfs_inode *ip, xfs_fileoff_t fileoff, xfs_filblks_t len,
>  		 int flags, unsigned long caller_ip),
> -	TP_ARGS(ip, bno, len, flags, caller_ip),
> +	TP_ARGS(ip, fileoff, len, flags, caller_ip),
>  	TP_STRUCT__entry(
>  		__field(dev_t, dev)
>  		__field(xfs_ino_t, ino)
>  		__field(xfs_fsize_t, size)
> -		__field(xfs_fileoff_t, bno)
> +		__field(xfs_fileoff_t, fileoff)
>  		__field(xfs_filblks_t, len)
>  		__field(unsigned long, caller_ip)
>  		__field(int, flags)
> @@ -1568,17 +1568,17 @@ TRACE_EVENT(xfs_bunmap,
>  		__entry->dev = VFS_I(ip)->i_sb->s_dev;
>  		__entry->ino = ip->i_ino;
>  		__entry->size = ip->i_disk_size;
> -		__entry->bno = bno;
> +		__entry->fileoff = fileoff;
>  		__entry->len = len;
>  		__entry->caller_ip = caller_ip;
>  		__entry->flags = flags;
>  	),
> -	TP_printk("dev %d:%d ino 0x%llx size 0x%llx bno 0x%llx len 0x%llx"
> +	TP_printk("dev %d:%d ino 0x%llx size 0x%llx fileoff 0x%llx len 0x%llx"
>  		  "flags %s caller %pS",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->size,
> -		  __entry->bno,
> +		  __entry->fileoff,
>  		  __entry->len,
>  		  __print_flags(__entry->flags, "|", XFS_BMAPI_FLAGS),
>  		  (void *)__entry->caller_ip)
> @@ -2271,7 +2271,7 @@ 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 blkno 0x%llx, len %u, flags 0x%x, size %d, "
> +	TP_printk("dev %d:%d daddr 0x%llx, len %u, flags 0x%x, size %d, "
>  			"map_size %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->blkno,
> @@ -2322,7 +2322,7 @@ 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, blkno 0x%llx, len %d, boffset %d",
> +			"dsize %d, daddr 0x%llx, len %d, boffset %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->size,
> @@ -3276,7 +3276,7 @@ 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 lblk 0x%llx len 0x%x pblk %llu st %d",
> +	TP_printk("dev %d:%d ino 0x%llx lblk 0x%llx len 0x%x startblock 0x%llx st %d",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->lblk,
> @@ -3417,7 +3417,7 @@ 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 bno %llu len %llu owner 0x%llx offset %llu flags 0x%x",
> +	TP_printk("dev %d:%d keydev %d:%d agno 0x%x startblock 0x%llx len %llu owner 0x%llx offset %llu flags 0x%x",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  MAJOR(__entry->keydev), MINOR(__entry->keydev),
>  		  __entry->agno,
> @@ -3457,7 +3457,7 @@ DECLARE_EVENT_CLASS(xfs_getfsmap_class,
>  		__entry->offset = fsmap->fmr_offset;
>  		__entry->flags = fsmap->fmr_flags;
>  	),
> -	TP_printk("dev %d:%d keydev %d:%d block %llu len %llu owner 0x%llx offset %llu flags 0x%llx",
> +	TP_printk("dev %d:%d keydev %d:%d daddr 0x%llx len %llu owner 0x%llx offset %llu flags 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  MAJOR(__entry->keydev), MINOR(__entry->keydev),
>  		  __entry->block,
> 

-- 
Carlos




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