/* * LSI/Engenio/NetApp E-Series RDAC SCSI Device Handler * * Copyright (C) 2005 Mike Christie. All rights reserved. * Copyright (C) Chandra Seetharaman, IBM Corp. 2007 * * 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. * */ #include <scsi/scsi.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_dh.h> #include <linux/workqueue.h> #include <linux/slab.h> #include <linux/module.h> #define RDAC_NAME … #define RDAC_RETRY_COUNT … /* * LSI mode page stuff * * These struct definitions and the forming of the * mode page were taken from the LSI RDAC 2.4 GPL'd * driver, and then converted to Linux conventions. */ #define RDAC_QUIESCENCE_TIME … /* * Page Codes */ #define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER … /* * Controller modes definitions */ #define RDAC_MODE_TRANSFER_SPECIFIED_LUNS … /* * RDAC Options field */ #define RDAC_FORCED_QUIESENCE … #define RDAC_TIMEOUT … #define RDAC_RETRIES … struct rdac_mode_6_hdr { … }; struct rdac_mode_10_hdr { … }; struct rdac_mode_common { … }; struct rdac_pg_legacy { … }; struct rdac_pg_expanded { … }; struct c9_inquiry { … }; #define SUBSYS_ID_LEN … #define SLOT_ID_LEN … #define ARRAY_LABEL_LEN … struct c4_inquiry { … }; #define UNIQUE_ID_LEN … struct c8_inquiry { … }; struct rdac_controller { … }; struct c2_inquiry { … }; struct rdac_dh_data { … }; static const char *mode[] = …; static const char *lun_state[] = …; struct rdac_queue_data { … }; static LIST_HEAD(ctlr_list); static DEFINE_SPINLOCK(list_lock); static struct workqueue_struct *kmpath_rdacd; static void send_mode_select(struct work_struct *work); /* * module parameter to enable rdac debug logging. * 2 bits for each type of logging, only two types defined for now * Can be enhanced if required at later point */ static int rdac_logging = …; module_param(rdac_logging, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(…) …; #define RDAC_LOG_FAILOVER … #define RDAC_LOG_SENSE … #define RDAC_LOG_BITS … #define RDAC_LOG_LEVEL(SHIFT) … #define RDAC_LOG(SHIFT, sdev, f, arg...) … static unsigned int rdac_failover_get(struct rdac_controller *ctlr, struct list_head *list, unsigned char *cdb) { … } static void release_controller(struct kref *kref) { … } static struct rdac_controller *get_controller(int index, char *array_name, u8 *array_id, struct scsi_device *sdev) { … } static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h, char *array_name, u8 *array_id) { … } static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h) { … } static int initialize_controller(struct scsi_device *sdev, struct rdac_dh_data *h, char *array_name, u8 *array_id) { … } static int set_mode_select(struct scsi_device *sdev, struct rdac_dh_data *h) { … } static int mode_select_handle_sense(struct scsi_device *sdev, struct scsi_sense_hdr *sense_hdr) { … } static void send_mode_select(struct work_struct *work) { … } static int queue_mode_select(struct scsi_device *sdev, activate_complete fn, void *data) { … } static int rdac_activate(struct scsi_device *sdev, activate_complete fn, void *data) { … } static blk_status_t rdac_prep_fn(struct scsi_device *sdev, struct request *req) { … } static enum scsi_disposition rdac_check_sense(struct scsi_device *sdev, struct scsi_sense_hdr *sense_hdr) { … } static int rdac_bus_attach(struct scsi_device *sdev) { … } static void rdac_bus_detach( struct scsi_device *sdev ) { … } static struct scsi_device_handler rdac_dh = …; static int __init rdac_init(void) { … } static void __exit rdac_exit(void) { … } module_init(…) …; module_exit(rdac_exit); MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_VERSION(…) …; MODULE_LICENSE(…) …;
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