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Re: [dm-devel] [PATCH 1/3] scsi_dh_rdac : Add definitions for different RDAC operating modes



Charles has been testing these patches for last couple of weeks. James, Can you please consider these patches for next scsi update..

> -----Original Message-----
> From: linux-scsi-owner vger kernel org [mailto:linux-scsi-
> owner vger kernel org] On Behalf Of Moger, Babu
> Sent: Friday, April 08, 2011 12:38 PM
> To: linux-scsi vger kernel org; device-mapper development
> Cc: Qi, Yanling; Chauhan, Vijay; Stankey, Robert; Arumugam, Anburaja;
> Krishnasamy, Somasundaram; Dachepalli, Sudhir
> Subject: [PATCH 1/3] scsi_dh_rdac : Add definitions for different RDAC
> operating modes
> 
> This patch adds definitions to support for different operating modes for
> LSI rdac storage.
> Currently, rdac support 3 operation modes.
> 
> 1. RDAC mode(legacy)
> 2. AVT mode
> 3. IOSHIP mode
> These definitions are used while activating the path(rdac_activate).
> 
> Signed-off-by: Babu Moger <babu moger lsi com>
> Reviewed-by: Yanling Qi <yanling qi lsi com>
> Reviewed-by: Sudhir Dachepalli <Sudhir Dachepalli lis com>
> Reviewed-by: Somasundaram Krishnasamy <Somasundaram Krishnasamy lsi com>
> Reviewed-by: Bob Stankey <Robert Stankey lsi com>
> Reviewed-by: Vijay Chauhan <Vijay Chauhan lsi com>

Tested-by: Charles Cummins <Charles cummins lsi com>

> 
> ---
> --- linux-2.6.38/drivers/scsi/device_handler/scsi_dh_rdac.c.orig	2011-
> 03-17 16:31:53.000000000 -0500
> +++ linux-2.6.38/drivers/scsi/device_handler/scsi_dh_rdac.c	2011-03-17
> 16:47:52.000000000 -0500
> @@ -182,6 +182,12 @@ struct rdac_dh_data {
>  	struct rdac_controller	*ctlr;
>  #define UNINITIALIZED_LUN	(1 << 8)
>  	unsigned		lun;
> +
> +#define RDAC_MODE		0
> +#define RDAC_MODE_AVT		1
> +#define RDAC_MODE_IOSHIP	2
> +	unsigned char		mode;
> +
>  #define RDAC_STATE_ACTIVE	0
>  #define RDAC_STATE_PASSIVE	1
>  	unsigned char		state;
> @@ -190,6 +196,11 @@ struct rdac_dh_data {
>  #define RDAC_LUN_OWNED		1
>  #define RDAC_LUN_AVT		2
>  	char			lun_state;
> +
> +#define RDAC_PREFERRED		0
> +#define RDAC_NON_PREFERRED	1
> +	char			preferred;
> +
>  	unsigned char		sense[SCSI_SENSE_BUFFERSIZE];
>  	union			{
>  		struct c2_inquiry c2;
> @@ -199,11 +210,15 @@ struct rdac_dh_data {
>  	} inq;
>  };
> 
> +static const char *mode[] = {
> +	"RDAC",
> +	"AVT",
> +	"IOSHIP",
> +};
>  static const char *lun_state[] =
>  {
>  	"unowned",
>  	"owned",
> -	"owned (AVT mode)",
>  };
> 
>  struct rdac_queue_data {
> @@ -836,8 +851,9 @@ static int rdac_bus_attach(struct scsi_d
>  	spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
> 
>  	sdev_printk(KERN_NOTICE, sdev,
> -		    "%s: LUN %d (%s)\n",
> -		    RDAC_NAME, h->lun, lun_state[(int)h->lun_state]);
> +		    "%s: LUN %d (%s) (%s)\n",
> +		    RDAC_NAME, h->lun, mode[(int)h->mode],
> +		    lun_state[(int)h->lun_state]);
> 
>  	return 0;
> 
> 
> 
> --
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