/******************************************************************************* * * This file contains the Linux/SCSI LLD virtual SCSI initiator driver * for emulated SAS initiator ports * * © Copyright 2011-2013 Datera, Inc. * * Licensed to the Linux Foundation under the General Public License (GPL) version 2. * * Author: Nicholas A. Bellinger <[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. ****************************************************************************/ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/configfs.h> #include <scsi/scsi.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_host.h> #include <scsi/scsi_device.h> #include <scsi/scsi_cmnd.h> #include <target/target_core_base.h> #include <target/target_core_fabric.h> #include "tcm_loop.h" #define to_tcm_loop_hba(hba) … static struct kmem_cache *tcm_loop_cmd_cache; static int tcm_loop_hba_no_cnt; static int tcm_loop_queue_status(struct se_cmd *se_cmd); static unsigned int tcm_loop_nr_hw_queues = …; module_param_named(nr_hw_queues, tcm_loop_nr_hw_queues, uint, 0644); static unsigned int tcm_loop_can_queue = …; module_param_named(can_queue, tcm_loop_can_queue, uint, 0644); static unsigned int tcm_loop_cmd_per_lun = …; module_param_named(cmd_per_lun, tcm_loop_cmd_per_lun, uint, 0644); /* * Called from struct target_core_fabric_ops->check_stop_free() */ static int tcm_loop_check_stop_free(struct se_cmd *se_cmd) { … } static void tcm_loop_release_cmd(struct se_cmd *se_cmd) { … } static int tcm_loop_show_info(struct seq_file *m, struct Scsi_Host *host) { … } static int tcm_loop_driver_probe(struct device *); static void tcm_loop_driver_remove(struct device *); static const struct bus_type tcm_loop_lld_bus = …; static struct device_driver tcm_loop_driverfs = …; /* * Used with root_device_register() in tcm_loop_alloc_core_bus() below */ static struct device *tcm_loop_primary; static void tcm_loop_target_queue_cmd(struct tcm_loop_cmd *tl_cmd) { … } /* * ->queuecommand can be and usually is called from interrupt context, so * defer the actual submission to a workqueue. */ static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) { … } /* * Called from SCSI EH process context to issue a LUN_RESET TMR * to struct scsi_device */ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, u64 lun, int task, enum tcm_tmreq_table tmr) { … } static int tcm_loop_abort_task(struct scsi_cmnd *sc) { … } /* * Called from SCSI EH process context to issue a LUN_RESET TMR * to struct scsi_device */ static int tcm_loop_device_reset(struct scsi_cmnd *sc) { … } static int tcm_loop_target_reset(struct scsi_cmnd *sc) { … } static const struct scsi_host_template tcm_loop_driver_template = …; static int tcm_loop_driver_probe(struct device *dev) { … } static void tcm_loop_driver_remove(struct device *dev) { … } static void tcm_loop_release_adapter(struct device *dev) { … } /* * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c */ static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) { … } /* * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated * tcm_loop SCSI bus. */ static int tcm_loop_alloc_core_bus(void) { … } static void tcm_loop_release_core_bus(void) { … } static inline struct tcm_loop_tpg *tl_tpg(struct se_portal_group *se_tpg) { … } static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) { … } static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) { … } /* * Returning (1) here allows for target_core_mod struct se_node_acl to be generated * based upon the incoming fabric dependent SCSI Initiator Port */ static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) { … } static int tcm_loop_check_prot_fabric_only(struct se_portal_group *se_tpg) { … } static u32 tcm_loop_sess_get_index(struct se_session *se_sess) { … } static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) { … } static int tcm_loop_write_pending(struct se_cmd *se_cmd) { … } static int tcm_loop_queue_data_or_status(const char *func, struct se_cmd *se_cmd, u8 scsi_status) { … } static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) { … } static int tcm_loop_queue_status(struct se_cmd *se_cmd) { … } static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) { … } static void tcm_loop_aborted_task(struct se_cmd *se_cmd) { … } static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) { … } /* Start items for tcm_loop_port_cit */ static int tcm_loop_port_link( struct se_portal_group *se_tpg, struct se_lun *lun) { … } static void tcm_loop_port_unlink( struct se_portal_group *se_tpg, struct se_lun *se_lun) { … } /* End items for tcm_loop_port_cit */ static ssize_t tcm_loop_tpg_attrib_fabric_prot_type_show( struct config_item *item, char *page) { … } static ssize_t tcm_loop_tpg_attrib_fabric_prot_type_store( struct config_item *item, const char *page, size_t count) { … } CONFIGFS_ATTR(…); static struct configfs_attribute *tcm_loop_tpg_attrib_attrs[] = …; /* Start items for tcm_loop_nexus_cit */ static int tcm_loop_alloc_sess_cb(struct se_portal_group *se_tpg, struct se_session *se_sess, void *p) { … } static int tcm_loop_make_nexus( struct tcm_loop_tpg *tl_tpg, const char *name) { … } static int tcm_loop_drop_nexus( struct tcm_loop_tpg *tpg) { … } /* End items for tcm_loop_nexus_cit */ static ssize_t tcm_loop_tpg_nexus_show(struct config_item *item, char *page) { … } static ssize_t tcm_loop_tpg_nexus_store(struct config_item *item, const char *page, size_t count) { … } static ssize_t tcm_loop_tpg_transport_status_show(struct config_item *item, char *page) { … } static ssize_t tcm_loop_tpg_transport_status_store(struct config_item *item, const char *page, size_t count) { … } static ssize_t tcm_loop_tpg_address_show(struct config_item *item, char *page) { … } CONFIGFS_ATTR(…); CONFIGFS_ATTR(…); CONFIGFS_ATTR_RO(…); static struct configfs_attribute *tcm_loop_tpg_attrs[] = …; /* Start items for tcm_loop_naa_cit */ static struct se_portal_group *tcm_loop_make_naa_tpg(struct se_wwn *wwn, const char *name) { … } static void tcm_loop_drop_naa_tpg( struct se_portal_group *se_tpg) { … } /* End items for tcm_loop_naa_cit */ /* Start items for tcm_loop_cit */ static struct se_wwn *tcm_loop_make_scsi_hba( struct target_fabric_configfs *tf, struct config_group *group, const char *name) { … } static void tcm_loop_drop_scsi_hba( struct se_wwn *wwn) { … } /* Start items for tcm_loop_cit */ static ssize_t tcm_loop_wwn_version_show(struct config_item *item, char *page) { … } CONFIGFS_ATTR_RO(…); static struct configfs_attribute *tcm_loop_wwn_attrs[] = …; /* End items for tcm_loop_cit */ static const struct target_core_fabric_ops loop_ops = …; static int __init tcm_loop_fabric_init(void) { … } static void __exit tcm_loop_fabric_exit(void) { … } MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; module_init(…) …; module_exit(tcm_loop_fabric_exit);
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