[linux.git] / include / scsi / scsi_dh.h

/*
 * Header file for SCSI device handler infrastruture.
 *
 * Modified version of patches posted by Mike Christie <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright IBM Corporation, 2007
 *      Authors:
 *               Chandra Seetharaman <[email protected]>
 *               Mike Anderson <[email protected]>
 */

#include <scsi/scsi_device.h>

enum {
	SCSI_DH_OK = 0,
	/*
	 * device errors
	 */
	SCSI_DH_DEV_FAILED,	/* generic device error */
	SCSI_DH_DEV_TEMP_BUSY,
	SCSI_DH_DEVICE_MAX,	/* max device blkerr definition */

	/*
	 * transport errors
	 */
	SCSI_DH_NOTCONN = SCSI_DH_DEVICE_MAX + 1,
	SCSI_DH_CONN_FAILURE,
	SCSI_DH_TRANSPORT_MAX,	/* max transport blkerr definition */

	/*
	 * driver and generic errors
	 */
	SCSI_DH_IO = SCSI_DH_TRANSPORT_MAX + 1,	/* generic error */
	SCSI_DH_INVALID_IO,
	SCSI_DH_RETRY,		/* retry the req, but not immediately */
	SCSI_DH_IMM_RETRY,	/* immediately retry the req */
	SCSI_DH_TIMED_OUT,
	SCSI_DH_RES_TEMP_UNAVAIL,
	SCSI_DH_DEV_OFFLINED,
	SCSI_DH_NOSYS,
	SCSI_DH_DRIVER_MAX,
};

extern int scsi_dh_activate(struct request_queue *);
extern int scsi_dh_handler_exist(const char *);
Commit	Line	Data
a6a8d9f8 CS	1	/*
	2	* Header file for SCSI device handler infrastruture.
	3	*
	4	* Modified version of patches posted by Mike Christie <[email protected]>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; if not, write to the Free Software Foundation, Inc.,
	18	* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	19	*
	20	* Copyright IBM Corporation, 2007
	21	* Authors:
	22	* Chandra Seetharaman <[email protected]>
	23	* Mike Anderson <[email protected]>
	24	*/
	25
	26	#include <scsi/scsi_device.h>
	27
	28	enum {
	29	SCSI_DH_OK = 0,
	30	/*
	31	* device errors
	32	*/
	33	SCSI_DH_DEV_FAILED, /* generic device error */
	34	SCSI_DH_DEV_TEMP_BUSY,
	35	SCSI_DH_DEVICE_MAX, /* max device blkerr definition */
	36
	37	/*
	38	* transport errors
	39	*/
	40	SCSI_DH_NOTCONN = SCSI_DH_DEVICE_MAX + 1,
	41	SCSI_DH_CONN_FAILURE,
	42	SCSI_DH_TRANSPORT_MAX, /* max transport blkerr definition */
	43
	44	/*
	45	* driver and generic errors
	46	*/
	47	SCSI_DH_IO = SCSI_DH_TRANSPORT_MAX + 1, /* generic error */
	48	SCSI_DH_INVALID_IO,
	49	SCSI_DH_RETRY, /* retry the req, but not immediately */
	50	SCSI_DH_IMM_RETRY, /* immediately retry the req */
	51	SCSI_DH_TIMED_OUT,
	52	SCSI_DH_RES_TEMP_UNAVAIL,
	53	SCSI_DH_DEV_OFFLINED,
	54	SCSI_DH_NOSYS,
	55	SCSI_DH_DRIVER_MAX,
	56	};
	57
	58	extern int scsi_dh_activate(struct request_queue *);
	59	extern int scsi_dh_handler_exist(const char *);