linux-ext4 - Re: [PATCHv6 6/9] fs.h: Add TRACE_IOCB

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Date:   Fri, 21 Apr 2023 08:56:07 -0700
From:   "Darrick J. Wong" <djwong@...nel.org>
To:     "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>,
        Ojaswin Mujoo <ojaswin@...ux.ibm.com>,
        Disha Goel <disgoel@...ux.ibm.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCHv6 6/9] fs.h: Add TRACE_IOCB_STRINGS for use in trace
 points

On Fri, Apr 21, 2023 at 03:16:16PM +0530, Ritesh Harjani (IBM) wrote:
> Add TRACE_IOCB_STRINGS macro which can be used in the trace point patch to
> print different flag values with meaningful string output.
> 
> Tested-by: Disha Goel <disgoel@...ux.ibm.com>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>

Looks good, will fix the indentation problems on commit.
Reviewed-by: Darrick J. Wong <djwong@...nel.org>

--D

> ---
>  include/linux/fs.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index c85916e9f7db..bdc1f7ed2aba 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -340,6 +340,20 @@ enum rw_hint {
>  /* can use bio alloc cache */
>  #define IOCB_ALLOC_CACHE	(1 << 21)
>  
> +/* for use in trace events */
> +#define TRACE_IOCB_STRINGS \
> +	{ IOCB_HIPRI, "HIPRI"	}, \
> +	{ IOCB_DSYNC, "DSYNC"	}, \
> +	{ IOCB_SYNC, "SYNC"	}, \
> +	{ IOCB_NOWAIT, "NOWAIT" }, \
> +	{ IOCB_APPEND, "APPEND" }, \
> +	{ IOCB_EVENTFD, "EVENTFD"}, \
> +	{ IOCB_DIRECT, "DIRECT" }, \
> +	{ IOCB_WRITE, "WRITE"	}, \
> +	{ IOCB_WAITQ, "WAITQ"	}, \
> +	{ IOCB_NOIO, "NOIO"	}, \
> +	{ IOCB_ALLOC_CACHE, "ALLOC_CACHE" }
> +
>  struct kiocb {
>  	struct file		*ki_filp;
>  	loff_t			ki_pos;
> -- 
> 2.39.2
>