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Re: [PATCH 5/6] dm: split out a helper to find the ioctl target

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On Tue, Aug 04 2015 at  3:11am -0400,
Christoph Hellwig <hch@lst.de> wrote:

> We want to reuse this code for the persistent reservation handling,
> so move it into a helper.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/md/dm.c | 50 ++++++++++++++++++++++++++++++++------------------
>  1 file changed, 32 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/md/dm.c b/drivers/md/dm.c
> index c68eb91..8dfc760 100644
> --- a/drivers/md/dm.c
> +++ b/drivers/md/dm.c
> @@ -556,18 +556,16 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
>  	return dm_get_geometry(md, geo);
>  }
>  
> -static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
> -			unsigned int cmd, unsigned long arg)
> +static int dm_get_ioctl_table(struct mapped_device *md,
> +		struct dm_target **tgt, struct block_device **bdev,
> +		fmode_t *mode, int *srcu_idx)

Would prefer to see something like:

static int dm_get_live_table_for_ioctl(struct mapped_device *md, int *srcu_idx,
	     struct dm_target **tgt, struct block_device **bdev, fmode_t *mode)

Otherwise, looks good.
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Thread

Persistent Reservation API Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
  [PATCH 1/6] block: cleanup blkdev_ioctl Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
    Re: [PATCH 1/6] block: cleanup blkdev_ioctl "Martin K. Petersen" <martin.petersen@oracle.com> - 2015-08-12 02:40 +0200
  [PATCH 6/6] dm: add support for passing through persistent reservations Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
  [PATCH 3/6] sd: implement the persisten reservation API Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
    Re: [PATCH 3/6] sd: implement the persisten reservation API "Martin K. Petersen" <martin.petersen@oracle.com> - 2015-08-12 03:00 +0200
  [PATCH 2/6] block: add a API for persistent reservations Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
    Re: [PATCH 2/6] block: add a API for persistent reservations "Martin K. Petersen" <martin.petersen@oracle.com> - 2015-08-12 02:50 +0200
  [PATCH 5/6] dm: split out a helper to find the ioctl target Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
    Re: [PATCH 5/6] dm: split out a helper to find the ioctl target Mike Snitzer <snitzer@redhat.com> - 2015-08-04 20:10 +0200
      Re: [PATCH 5/6] dm: split out a helper to find the ioctl target Christoph Hellwig <hch@lst.de> - 2015-08-06 15:50 +0200
  [PATCH 4/6] dm: refactor ioctl handling Christoph Hellwig <hch@lst.de> - 2015-08-04 09:20 +0200
    Re: [PATCH 4/6] dm: refactor ioctl handling Mike Snitzer <snitzer@redhat.com> - 2015-08-04 20:00 +0200
      Re: [PATCH 4/6] dm: refactor ioctl handling Christoph Hellwig <hch@lst.de> - 2015-08-06 15:50 +0200
  Re: Persistent Reservation API Mike Snitzer <snitzer@redhat.com> - 2015-08-04 20:00 +0200
    Re: Persistent Reservation API Christoph Hellwig <hch@lst.de> - 2015-08-06 15:50 +0200
  Re: Persistent Reservation API Keith Busch <keith.busch@intel.com> - 2015-08-04 20:10 +0200
    Re: Persistent Reservation API Christoph Hellwig <hch@lst.de> - 2015-08-06 15:50 +0200

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