[dm-devel] Re: [PATCH 2/3] scsi_dh: Provide set_params interface in emc device handler
Eddie Williams
Eddie.Williams at steeleye.com
Mon Jul 20 13:00:13 UTC 2009
On Wed, 2009-07-01 at 20:13 -0700, Chandra Seetharaman wrote:
> Handle the parameters provided by user thru multipath.
>
> This handler expects only 2 parameters and their value can either be 0 or 1.
>
> This code originates from the old dm-emc.c file. Appropriate changes have
> been made to make it work in the new design.
>
> Signed-off-by: Chandra Seetharaman <sekharan at us.ibm.com>
> ---
> drivers/scsi/device_handler/scsi_dh_emc.c | 56 ++++++++++++++++++++++++++++++
> 1 file changed, 56 insertions(+)
>
> Index: linux-2.6.31-rc1/drivers/scsi/device_handler/scsi_dh_emc.c
> ===================================================================
> --- linux-2.6.31-rc1.orig/drivers/scsi/device_handler/scsi_dh_emc.c
> +++ linux-2.6.31-rc1/drivers/scsi/device_handler/scsi_dh_emc.c
> @@ -561,6 +561,61 @@ done:
>
> return result;
> }
> +/*
> + * params - parameters in the following format
> + * "no_of_params\0param1\0param2\0param3\0...\0"
> + * for example, string for 2 parameters with value 10 and 21
> + * is specified as "2\010\021\0".
> + */
> +static int clariion_set_params(struct scsi_device *sdev, const char *params)
> +{
> + struct clariion_dh_data *csdev = get_clariion_data(sdev);
> + unsigned int hr = 0, st = 0, argc;
> + char *p = params;
This throws a compiler warning resolved with a type cast:
char *p = (char *)params;
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