tcm_loop.c revision afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8
13703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/******************************************************************************* 23703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 33703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * This file contains the Linux/SCSI LLD virtual SCSI initiator driver 43703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * for emulated SAS initiator ports 53703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 63703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * © Copyright 2011 RisingTide Systems LLC. 73703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 83703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 93703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Author: Nicholas A. Bellinger <nab@risingtidesystems.com> 113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * This program is free software; you can redistribute it and/or modify 133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * it under the terms of the GNU General Public License as published by 143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * (at your option) any later version. 163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * This program is distributed in the hope that it will be useful, 183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * GNU General Public License for more details. 213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ****************************************************************************/ 223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <linux/module.h> 243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <linux/moduleparam.h> 253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <linux/init.h> 263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <linux/slab.h> 273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <linux/types.h> 283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <linux/configfs.h> 293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <scsi/scsi.h> 303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <scsi/scsi_tcq.h> 313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <scsi/scsi_host.h> 323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <scsi/scsi_device.h> 333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <scsi/scsi_cmnd.h> 343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <target/target_core_base.h> 36c4795fb20edf2fe2c862c8fe9f8b681edeb79ac1Christoph Hellwig#include <target/target_core_fabric.h> 373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <target/target_core_fabric_configfs.h> 383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include <target/target_core_configfs.h> 393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#include "tcm_loop.h" 413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger#define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev) 433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* Local pointer to allocated TCM configfs fabric module */ 453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct target_fabric_configfs *tcm_loop_fabric_configfs; 463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 47afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigstatic struct workqueue_struct *tcm_loop_workqueue; 483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct kmem_cache *tcm_loop_cmd_cache; 493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_hba_no_cnt; 513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Called by struct target_core_fabric_ops->new_cmd_map() 543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Always called in process context. A non zero return value 563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * here will signal to handle an exception based on the return code. 573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_new_cmd_map(struct se_cmd *se_cmd) 593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 635951146dea1ac8ff2f177477c907084d63913cadAndy Grover struct scatterlist *sgl_bidi = NULL; 645951146dea1ac8ff2f177477c907084d63913cadAndy Grover u32 sgl_bidi_count = 0; 653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret; 663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Allocate the necessary tasks to complete the received CDB+data 683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 695951146dea1ac8ff2f177477c907084d63913cadAndy Grover ret = transport_generic_allocate_tasks(se_cmd, sc->cmnd); 7003e98c9eb916f3f0868c1dc344dde2a60287ff72Nicholas Bellinger if (ret != 0) 7103e98c9eb916f3f0868c1dc344dde2a60287ff72Nicholas Bellinger return ret; 723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 735951146dea1ac8ff2f177477c907084d63913cadAndy Grover * For BIDI commands, pass in the extra READ buffer 745951146dea1ac8ff2f177477c907084d63913cadAndy Grover * to transport_generic_map_mem_to_cmd() below.. 753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 7633c3fafc43e56a22be60ebe67bec5ba763d51010Christoph Hellwig if (se_cmd->se_cmd_flags & SCF_BIDI) { 775951146dea1ac8ff2f177477c907084d63913cadAndy Grover struct scsi_data_buffer *sdb = scsi_in(sc); 783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 795951146dea1ac8ff2f177477c907084d63913cadAndy Grover sgl_bidi = sdb->table.sgl; 805951146dea1ac8ff2f177477c907084d63913cadAndy Grover sgl_bidi_count = sdb->table.nents; 813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 828cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger /* 838cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger * Because some userspace code via scsi-generic do not memset their 848cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger * associated read buffers, go ahead and do that here for type 858cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger * SCF_SCSI_CONTROL_SG_IO_CDB. Also note that this is currently 868cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger * guaranteed to be a single SGL for SCF_SCSI_CONTROL_SG_IO_CDB 878cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger * by target core in transport_generic_allocate_tasks() -> 888cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger * transport_generic_cmd_sequencer(). 898cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger */ 908cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger if (se_cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB && 918cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger se_cmd->data_direction == DMA_FROM_DEVICE) { 928cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger struct scatterlist *sg = scsi_sglist(sc); 938cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger unsigned char *buf = kmap(sg_page(sg)) + sg->offset; 948cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger 958cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger if (buf != NULL) { 968cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger memset(buf, 0, sg->length); 978cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger kunmap(sg_page(sg)); 988cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger } 998cd79f24350826b81e16990d9e12bc878e67d385Nicholas Bellinger } 1005951146dea1ac8ff2f177477c907084d63913cadAndy Grover 101ec98f7825c6eaa4a9afb0eb518826efc8a2ed4a2Andy Grover /* Tell the core about our preallocated memory */ 10203e98c9eb916f3f0868c1dc344dde2a60287ff72Nicholas Bellinger return transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc), 1035951146dea1ac8ff2f177477c907084d63913cadAndy Grover scsi_sg_count(sc), sgl_bidi, sgl_bidi_count); 1043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 1053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 1073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Called from struct target_core_fabric_ops->check_stop_free() 1083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 10988dd9e26d6d3e743f9c7e4562b94b2ad3c2994d3Nicholas Bellingerstatic int tcm_loop_check_stop_free(struct se_cmd *se_cmd) 1103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 1113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 1123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Do not release struct se_cmd's containing a valid TMR 1133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * pointer. These will be released directly in tcm_loop_device_reset() 1143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * with transport_generic_free_cmd(). 1153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 116c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) 11788dd9e26d6d3e743f9c7e4562b94b2ad3c2994d3Nicholas Bellinger return 0; 1183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 1193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Release the struct se_cmd, which will make a callback to release 1203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd() 1213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 12282f1c8a4e7739eae9f1c32c2c419efdc19b8af41Christoph Hellwig transport_generic_free_cmd(se_cmd, 0); 12388dd9e26d6d3e743f9c7e4562b94b2ad3c2994d3Nicholas Bellinger return 1; 1243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 1253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12635462975b2b197b990fedbb74b81f9bea9d344cbChristoph Hellwigstatic void tcm_loop_release_cmd(struct se_cmd *se_cmd) 1273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 1283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 1293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 1303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 1323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 1333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_proc_info(struct Scsi_Host *host, char *buffer, 1353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger char **start, off_t offset, 1363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int length, int inout) 1373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 1383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sprintf(buffer, "tcm_loop_proc_info()\n"); 1393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 1403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_driver_probe(struct device *); 1423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_driver_remove(struct device *); 1433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int pseudo_lld_bus_match(struct device *dev, 1453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct device_driver *dev_driver) 1463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 1473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 1483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 1493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct bus_type tcm_loop_lld_bus = { 1513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .name = "tcm_loop_bus", 1523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .match = pseudo_lld_bus_match, 1533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .probe = tcm_loop_driver_probe, 1543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .remove = tcm_loop_driver_remove, 1553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger}; 1563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct device_driver tcm_loop_driverfs = { 1583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .name = "tcm_loop", 1593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .bus = &tcm_loop_lld_bus, 1603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger}; 1613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 1623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Used with root_device_register() in tcm_loop_alloc_core_bus() below 1633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 1643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstruct device *tcm_loop_primary; 1653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 1673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and 1683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * drivers/scsi/libiscsi.c:iscsi_change_queue_depth() 1693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 1703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_change_queue_depth( 1713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct scsi_device *sdev, 1723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int depth, 1733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int reason) 1743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 1753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger switch (reason) { 1763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_QDEPTH_DEFAULT: 1773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 1783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 1793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_QDEPTH_QFULL: 1803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_track_queue_full(sdev, depth); 1813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 1823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_QDEPTH_RAMP_UP: 1833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 1843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 1853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger default: 1863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EOPNOTSUPP; 1873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 1883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sdev->queue_depth; 1893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 1903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 1913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 192f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig * Locate the SAM Task Attr from struct scsi_cmnd * 193f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig */ 194f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwigstatic int tcm_loop_sam_attr(struct scsi_cmnd *sc) 195f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig{ 196f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig if (sc->device->tagged_supported) { 197f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig switch (sc->tag) { 198f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig case HEAD_OF_QUEUE_TAG: 199f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig return MSG_HEAD_TAG; 200f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig case ORDERED_QUEUE_TAG: 201f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig return MSG_ORDERED_TAG; 202f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig default: 203f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig break; 204f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig } 205f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig } 206f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 207f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig return MSG_SIMPLE_TAG; 208f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig} 209f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 210afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigstatic void tcm_loop_submission_work(struct work_struct *work) 2113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 212afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig struct tcm_loop_cmd *tl_cmd = 213afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig container_of(work, struct tcm_loop_cmd, work); 214afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd; 215afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig struct scsi_cmnd *sc = tl_cmd->sc; 216afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig struct tcm_loop_nexus *tl_nexus; 2173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 2183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg; 2193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 2203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 2213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 222afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 2230a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger /* 2240a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger * Ensure that this tl_tpg reference from the incoming sc->device->id 2250a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger * has already been configured via tcm_loop_make_naa_tpg(). 2260a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger */ 2270a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger if (!tl_tpg->tl_hba) { 2280a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger set_host_byte(sc, DID_NO_CONNECT); 229f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig goto out_done; 2300a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger } 231f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 232f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig tl_nexus = tl_hba->tl_nexus; 233f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig if (!tl_nexus) { 234f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" 235f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig " does not exist\n"); 236f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig set_host_byte(sc, DID_ERROR); 237f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig goto out_done; 2383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 239f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 240afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig transport_init_se_cmd(se_cmd, tl_tpg->tl_se_tpg.se_tpg_tfo, 241afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig tl_nexus->se_sess, 242f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig scsi_bufflen(sc), sc->sc_data_direction, 243f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig tcm_loop_sam_attr(sc), &tl_cmd->tl_sense_buf[0]); 244f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 245f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig if (scsi_bidi_cmnd(sc)) 246f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig se_cmd->se_cmd_flags |= SCF_BIDI; 247f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 248f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig if (transport_lookup_cmd_lun(se_cmd, tl_cmd->sc->device->lun) < 0) { 249f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 250f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig set_host_byte(sc, DID_NO_CONNECT); 251f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig goto out_done; 252f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig } 253f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 2543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger transport_generic_handle_cdb_map(se_cmd); 255afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig return; 256f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig 257f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwigout_done: 258f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig sc->scsi_done(sc); 259afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig return; 260afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig} 261afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 262afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig/* 263afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig * ->queuecommand can be and usually is called from interrupt context, so 264afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig * defer the actual submission to a workqueue. 265afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig */ 266afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigstatic int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) 267afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig{ 268afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig struct tcm_loop_cmd *tl_cmd; 269afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 270afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig pr_debug("tcm_loop_queuecommand() %d:%d:%d:%d got CDB: 0x%02x" 271afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig " scsi_buf_len: %u\n", sc->device->host->host_no, 272afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig sc->device->id, sc->device->channel, sc->device->lun, 273afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig sc->cmnd[0], scsi_bufflen(sc)); 274afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 275afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); 276afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig if (!tl_cmd) { 277afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig pr_err("Unable to allocate struct tcm_loop_cmd\n"); 278afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig set_host_byte(sc, DID_ERROR); 279afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig sc->scsi_done(sc); 280afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig return 0; 281afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig } 282afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 283afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig tl_cmd->sc = sc; 284afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); 285afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig queue_work(tcm_loop_workqueue, &tl_cmd->work); 286f872c9f417a38a08b6ffe46e1f937d3db1d22775Christoph Hellwig return 0; 2873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 2883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 2893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 2903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Called from SCSI EH process context to issue a LUN_RESET TMR 2913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * to struct scsi_device 2923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 2933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_device_reset(struct scsi_cmnd *sc) 2943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 2953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_cmd *se_cmd = NULL; 2963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg; 2973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_session *se_sess; 2983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd *tl_cmd = NULL; 2993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 3003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nexus *tl_nexus; 3013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tmr *tl_tmr = NULL; 3023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg; 303c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover int ret = FAILED, rc; 3043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Locate the tcm_loop_hba_t pointer 3063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Locate the tl_nexus and se_sess pointers 3103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus = tl_hba->tl_nexus; 3123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_nexus) { 3136708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to perform device reset without" 3143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " active I_T Nexus\n"); 3153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return FAILED; 3163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 3173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_sess = tl_nexus->se_sess; 3183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id 3203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 3223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 3233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 3243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); 3253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_cmd) { 3266708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate memory for tl_cmd\n"); 3273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return FAILED; 3283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 3293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 3303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); 3313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_tmr) { 3326708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate memory for tl_tmr\n"); 3333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto release; 3343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 3353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger init_waitqueue_head(&tl_tmr->tl_tmr_wait); 3363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 3373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_cmd = &tl_cmd->tl_se_cmd; 3383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 3403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, 34261db1802bf33bf027cd97ba3f79566b2b2fce5c6Nicholas Bellinger DMA_NONE, MSG_SIMPLE_TAG, 3433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tl_cmd->tl_sense_buf[0]); 344c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover 345c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover rc = core_tmr_alloc_req(se_cmd, tl_tmr, TMR_LUN_RESET, GFP_KERNEL); 346c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover if (rc < 0) 3473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto release; 3483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Locate the underlying TCM struct se_lun from sc->device->lun 3503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3515951146dea1ac8ff2f177477c907084d63913cadAndy Grover if (transport_lookup_tmr_lun(se_cmd, sc->device->lun) < 0) 3523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto release; 3533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Queue the TMR to TCM Core and sleep waiting for tcm_loop_queue_tm_rsp() 3553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * to wake us up. 3563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger transport_generic_handle_tmr(se_cmd); 3583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); 3593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 3603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * The TMR LUN_RESET has completed, check the response status and 3613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * then release allocations. 3623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 3633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = (se_cmd->se_tmr_req->response == TMR_FUNCTION_COMPLETE) ? 3643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger SUCCESS : FAILED; 3653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerrelease: 3663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (se_cmd) 36782f1c8a4e7739eae9f1c32c2c419efdc19b8af41Christoph Hellwig transport_generic_free_cmd(se_cmd, 1); 3683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger else 3693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 3703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kfree(tl_tmr); 3713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ret; 3723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 3733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 3743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_slave_alloc(struct scsi_device *sd) 3753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 3763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); 3773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 3783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 3793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 3803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_slave_configure(struct scsi_device *sd) 3813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 3823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 3833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 3843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 3853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct scsi_host_template tcm_loop_driver_template = { 3863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .proc_info = tcm_loop_proc_info, 3873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .proc_name = "tcm_loopback", 3883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .name = "TCM_Loopback", 3893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .queuecommand = tcm_loop_queuecommand, 3903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .change_queue_depth = tcm_loop_change_queue_depth, 3913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .eh_device_reset_handler = tcm_loop_device_reset, 3922e88efd3aaafa0df05593cdfa5fd17afe922781dChristoph Hellwig .can_queue = 1024, 3933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .this_id = -1, 3942e88efd3aaafa0df05593cdfa5fd17afe922781dChristoph Hellwig .sg_tablesize = 256, 3952e88efd3aaafa0df05593cdfa5fd17afe922781dChristoph Hellwig .cmd_per_lun = 1024, 3962e88efd3aaafa0df05593cdfa5fd17afe922781dChristoph Hellwig .max_sectors = 0xFFFF, 3973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .use_clustering = DISABLE_CLUSTERING, 3983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .slave_alloc = tcm_loop_slave_alloc, 3993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .slave_configure = tcm_loop_slave_configure, 4003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger .module = THIS_MODULE, 4013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger}; 4023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_driver_probe(struct device *dev) 4043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 4053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 4063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct Scsi_Host *sh; 4073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int error; 4083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh = scsi_host_alloc(&tcm_loop_driver_template, 4123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sizeof(struct tcm_loop_hba)); 4133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!sh) { 4146708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate struct scsi_host\n"); 4153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENODEV; 4163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 4173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba->sh = sh; 4183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 4203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata 4213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 4223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; 4233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 4243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Setup single ID, Channel and LUN for now.. 4253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 4263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh->max_id = 2; 4273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh->max_lun = 0; 4283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh->max_channel = 0; 4293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; 4303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger error = scsi_add_host(sh, &tl_hba->dev); 4323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (error) { 4336708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("%s: scsi_add_host failed\n", __func__); 4343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_host_put(sh); 4353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENODEV; 4363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 4373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 4383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 4393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_driver_remove(struct device *dev) 4413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 4423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 4433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct Scsi_Host *sh; 4443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh = tl_hba->sh; 4473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_remove_host(sh); 4493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_host_put(sh); 4503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 4513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 4523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_release_adapter(struct device *dev) 4543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 4553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); 4563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kfree(tl_hba); 4583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 4593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 4613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c 4623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 4633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) 4643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 4653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret; 4663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba->dev.bus = &tcm_loop_lld_bus; 4683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba->dev.parent = tcm_loop_primary; 4693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba->dev.release = &tcm_loop_release_adapter; 4703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); 4713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = device_register(&tl_hba->dev); 4733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret) { 4746708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("device_register() failed for" 4753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " tl_hba->dev: %d\n", ret); 4763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENODEV; 4773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 4783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 4803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 4813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 4833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated 4843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * tcm_loop SCSI bus. 4853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 4863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_alloc_core_bus(void) 4873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 4883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret; 4893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_primary = root_device_register("tcm_loop_0"); 4913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (IS_ERR(tcm_loop_primary)) { 4926708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate tcm_loop_primary\n"); 4933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return PTR_ERR(tcm_loop_primary); 4943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 4953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 4963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = bus_register(&tcm_loop_lld_bus); 4973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret) { 4986708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("bus_register() failed for tcm_loop_lld_bus\n"); 4993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto dev_unreg; 5003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 5013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = driver_register(&tcm_loop_driverfs); 5033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret) { 5046708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("driver_register() failed for" 5053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger "tcm_loop_driverfs\n"); 5063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto bus_unreg; 5073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 5083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5096708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("Initialized TCM Loop Core Bus\n"); 5103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ret; 5113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerbus_unreg: 5133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerdev_unreg: 5153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger root_device_unregister(tcm_loop_primary); 5163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ret; 5173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_release_core_bus(void) 5203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger driver_unregister(&tcm_loop_driverfs); 5223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger root_device_unregister(tcm_loop_primary); 5243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5256708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("Releasing TCM Loop Core BUS\n"); 5263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic char *tcm_loop_get_fabric_name(void) 5293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return "loopback"; 5313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) 5343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5358359cf43b9dccddeebb0d247146719a14ce6371aJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 5363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 5373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 5383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() 5393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * time based on the protocol dependent prefix of the passed configfs group. 5403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 5413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Based upon tl_proto_id, TCM_Loop emulates the requested fabric 5423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * ProtocolID using target_core_fabric_lib.c symbols. 5433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 5443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger switch (tl_hba->tl_proto_id) { 5453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_SAS: 5463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 5473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_FCP: 5483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return fc_get_fabric_proto_ident(se_tpg); 5493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_ISCSI: 5503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return iscsi_get_fabric_proto_ident(se_tpg); 5513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger default: 5526708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 5533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 5543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 5553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 5563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 5583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) 5613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5628359cf43b9dccddeebb0d247146719a14ce6371aJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 5633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 5643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Return the passed NAA identifier for the SAS Target Port 5653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 5663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return &tl_tpg->tl_hba->tl_wwn_address[0]; 5673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) 5703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5718359cf43b9dccddeebb0d247146719a14ce6371aJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 5723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 5733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 5743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * to represent the SCSI Target Port. 5753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 5763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return tl_tpg->tl_tpgt; 5773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) 5803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 5823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 5833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u32 tcm_loop_get_pr_transport_id( 5853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 5863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_node_acl *se_nacl, 5873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct t10_pr_registration *pr_reg, 5883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int *format_code, 5893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger unsigned char *buf) 5903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 5918359cf43b9dccddeebb0d247146719a14ce6371aJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 5923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 5933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 5943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger switch (tl_hba->tl_proto_id) { 5953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_SAS: 5963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 5973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code, buf); 5983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_FCP: 5993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code, buf); 6013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code, buf); 6043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger default: 6056708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 6083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 6093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code, buf); 6123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 6133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u32 tcm_loop_get_pr_transport_id_len( 6153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 6163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_node_acl *se_nacl, 6173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct t10_pr_registration *pr_reg, 6183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int *format_code) 6193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 6208359cf43b9dccddeebb0d247146719a14ce6371aJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger switch (tl_hba->tl_proto_id) { 6243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_SAS: 6253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code); 6273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_FCP: 6283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code); 6303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code); 6333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger default: 6346708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 6373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 6383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger format_code); 6413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 6423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 6443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above 6453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. 6463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 6473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic char *tcm_loop_parse_pr_out_transport_id( 6483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 6493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger const char *buf, 6503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger u32 *out_tid_len, 6513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger char **port_nexus_ptr) 6523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 6538359cf43b9dccddeebb0d247146719a14ce6371aJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger switch (tl_hba->tl_proto_id) { 6573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_SAS: 6583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 6593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_nexus_ptr); 6603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_FCP: 6613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 6623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_nexus_ptr); 6633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 6653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_nexus_ptr); 6663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger default: 6676708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 6703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 6713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 6733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_nexus_ptr); 6743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 6753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 6773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Returning (1) here allows for target_core_mod struct se_node_acl to be generated 6783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * based upon the incoming fabric dependent SCSI Initiator Port 6793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 6803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) 6813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 6823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 6833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 6843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) 6863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 6873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 6883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 6893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 6913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for 6923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest 6933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 6943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) 6953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 6963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 6973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 6983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 6993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* 7003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will 7013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * never be called for TCM_Loop by target_core_fabric_configfs.c code. 7023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * It has been added here as a nop for target_fabric_tf_ops_check() 7033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 7043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) 7053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 7073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( 7103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg) 7113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nacl *tl_nacl; 7133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); 7153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_nacl) { 7166708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate struct tcm_loop_nacl\n"); 7173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return NULL; 7183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 7193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return &tl_nacl->se_node_acl; 7213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_tpg_release_fabric_acl( 7243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 7253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_node_acl *se_nacl) 7263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, 7283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nacl, se_node_acl); 7293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kfree(tl_nacl); 7313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) 7343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 7363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_is_state_remove(struct se_cmd *se_cmd) 7393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 7413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Assume struct scsi_cmnd is not in remove state.. 7423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 7433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 7443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_sess_logged_in(struct se_session *se_sess) 7473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 7493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Assume that TL Nexus is always active 7503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 7513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 7523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u32 tcm_loop_sess_get_index(struct se_session *se_sess) 7553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 7573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) 7603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return; 7623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) 7653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 1; 7673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) 7703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 7723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 7733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return tl_cmd->sc_cmd_state; 7753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_shutdown_session(struct se_session *se_sess) 7783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 7803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_close_session(struct se_session *se_sess) 7833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return; 7853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger}; 7863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_stop_session( 7883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_session *se_sess, 7893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int sess_sleep, 7903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int conn_sleep) 7913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return; 7933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 7953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_fall_back_to_erl0(struct se_session *se_sess) 7963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 7973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return; 7983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 7993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_write_pending(struct se_cmd *se_cmd) 8013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 8033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Since Linux/SCSI has already sent down a struct scsi_cmnd 8043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array 8053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * memory, and memory has already been mapped to struct se_cmd->t_mem_list 8063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * format with transport_generic_map_mem_to_cmd(). 8073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * 8083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * We now tell TCM to add this WRITE CDB directly into the TCM storage 8093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * object execution queue. 8103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 8113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger transport_generic_process_write(se_cmd); 8123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_write_pending_status(struct se_cmd *se_cmd) 8163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_queue_data_in(struct se_cmd *se_cmd) 8213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8266708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" 8273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sc->result = SAM_STAT_GOOD; 8303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger set_host_byte(sc, DID_OK); 8313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sc->scsi_done(sc); 8323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_queue_status(struct se_cmd *se_cmd) 8363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8416708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" 8423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (se_cmd->sense_buffer && 8453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 8463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 8473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8485951146dea1ac8ff2f177477c907084d63913cadAndy Grover memcpy(sc->sense_buffer, se_cmd->sense_buffer, 8493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger SCSI_SENSE_BUFFERSIZE); 8503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sc->result = SAM_STAT_CHECK_CONDITION; 8513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger set_driver_byte(sc, DRIVER_SENSE); 8523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } else 8533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sc->result = se_cmd->scsi_status; 8543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger set_host_byte(sc, DID_OK); 8563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sc->scsi_done(sc); 8573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) 8613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 8633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; 8643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 8653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead 8663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * and wake up the wait_queue_head_t in tcm_loop_device_reset() 8673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 8683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger atomic_set(&tl_tmr->tmr_complete, 1); 8693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger wake_up(&tl_tmr->tl_tmr_wait); 8703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u16 tcm_loop_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length) 8743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic u16 tcm_loop_get_fabric_sense_len(void) 8793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 8813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) 8843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 8853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger switch (tl_hba->tl_proto_id) { 8863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_SAS: 8873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return "SAS"; 8883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_FCP: 8893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return "FCP"; 8903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger case SCSI_PROTOCOL_ISCSI: 8913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return "iSCSI"; 8923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger default: 8933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger break; 8943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 8953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return "Unknown"; 8973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 8983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 8993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* Start items for tcm_loop_port_cit */ 9003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_port_link( 9023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 9033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_lun *lun) 9043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 9053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 9063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 9073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger atomic_inc(&tl_tpg->tl_tpg_port_count); 9103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger smp_mb__after_atomic_inc(); 9113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 9123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Add Linux/SCSI struct scsi_device by HCTL 9133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 9143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); 9153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9166708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); 9173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 9183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 9193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_port_unlink( 9213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 9223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_lun *se_lun) 9233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 9243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct scsi_device *sd; 9253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 9263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg; 9273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); 9293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = tl_tpg->tl_hba; 9303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, 9323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_lun->unpacked_lun); 9333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!sd) { 9346708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to locate struct scsi_device for %d:%d:" 9353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); 9363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return; 9373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 9383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 9393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Remove Linux/SCSI struct scsi_device by HCTL 9403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 9413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_remove_device(sd); 9423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger scsi_device_put(sd); 9433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger atomic_dec(&tl_tpg->tl_tpg_port_count); 9453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger smp_mb__after_atomic_dec(); 9463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9476708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); 9483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 9493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* End items for tcm_loop_port_cit */ 9513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* Start items for tcm_loop_nexus_cit */ 9533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_make_nexus( 9553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg, 9563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger const char *name) 9573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 9583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg; 9593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nexus *tl_nexus; 961552523dcbf0f33d44d816da310be8227a2c1502aDan Carpenter int ret = -ENOMEM; 9623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (tl_tpg->tl_hba->tl_nexus) { 9646708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n"); 9653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EEXIST; 9663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 9673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 9683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 9693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); 9703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_nexus) { 9716708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate struct tcm_loop_nexus\n"); 9723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENOMEM; 9733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 9743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 9753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Initialize the struct se_session pointer 9763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 9773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus->se_sess = transport_init_session(); 978552523dcbf0f33d44d816da310be8227a2c1502aDan Carpenter if (IS_ERR(tl_nexus->se_sess)) { 979552523dcbf0f33d44d816da310be8227a2c1502aDan Carpenter ret = PTR_ERR(tl_nexus->se_sess); 9803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto out; 981552523dcbf0f33d44d816da310be8227a2c1502aDan Carpenter } 9823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 9833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Since we are running in 'demo mode' this call with generate a 9843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI 9853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Initiator port name of the passed configfs group 'name'. 9863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 9873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( 9883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_tpg, (unsigned char *)name); 9893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_nexus->se_sess->se_node_acl) { 9903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger transport_free_session(tl_nexus->se_sess); 9913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto out; 9923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 9933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 9943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Now, register the SAS I_T Nexus as active with the call to 9953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * transport_register_session() 9963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 9973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, 9985951146dea1ac8ff2f177477c907084d63913cadAndy Grover tl_nexus->se_sess, tl_nexus); 9993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg->tl_hba->tl_nexus = tl_nexus; 10006708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" 10013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger name); 10033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 10043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerout: 10063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kfree(tl_nexus); 1007552523dcbf0f33d44d816da310be8227a2c1502aDan Carpenter return ret; 10083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 10093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_drop_nexus( 10113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tpg) 10123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 10133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_session *se_sess; 10143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tpg->tl_hba; 10163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus = tpg->tl_hba->tl_nexus; 10183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_nexus) 10193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENODEV; 10203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger se_sess = tl_nexus->se_sess; 10223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!se_sess) 10233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENODEV; 10243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (atomic_read(&tpg->tl_tpg_port_count)) { 10266708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to remove TCM_Loop I_T Nexus with" 10273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " active TPG port count: %d\n", 10283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger atomic_read(&tpg->tl_tpg_port_count)); 10293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EPERM; 10303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 10313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10326708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" 10333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 10363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Release the SCSI I_T Nexus to the emulated SAS Target Port 10373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 10383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger transport_deregister_session(tl_nexus->se_sess); 10393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tpg->tl_hba->tl_nexus = NULL; 10403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kfree(tl_nexus); 10413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 10423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 10433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* End items for tcm_loop_nexus_cit */ 10453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic ssize_t tcm_loop_tpg_show_nexus( 10473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 10483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger char *page) 10493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 10503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 10513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 10523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ssize_t ret; 10543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus = tl_tpg->tl_hba->tl_nexus; 10563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_nexus) 10573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -ENODEV; 10583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = snprintf(page, PAGE_SIZE, "%s\n", 10603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ret; 10633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 10643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic ssize_t tcm_loop_tpg_store_nexus( 10663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg, 10673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger const char *page, 10683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger size_t count) 10693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 10703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 10713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 10723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 10733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; 10743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret; 10753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 10763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Shutdown the active I_T nexus if 'NULL' is passed.. 10773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 10783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!strncmp(page, "NULL", 4)) { 10793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = tcm_loop_drop_nexus(tl_tpg); 10803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return (!ret) ? count : ret; 10813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 10823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 10833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Otherwise make sure the passed virtual Initiator port WWN matches 10843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call 10853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * tcm_loop_make_nexus() 10863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 108760d645a4e9e7e7ddc20e534fea82aa4e6947f911Dan Carpenter if (strlen(page) >= TL_WWN_ADDR_LEN) { 10886708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Emulated NAA Sas Address: %s, exceeds" 10893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " max: %d\n", page, TL_WWN_ADDR_LEN); 10903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EINVAL; 10913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 10923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); 10933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 10943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ptr = strstr(i_port, "naa."); 10953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ptr) { 10963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { 10976708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Passed SAS Initiator Port %s does not" 10983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " match target port protoid: %s\n", i_port, 10993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EINVAL; 11013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_ptr = &i_port[0]; 11033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto check_newline; 11043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ptr = strstr(i_port, "fc."); 11063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ptr) { 11073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { 11086708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Passed FCP Initiator Port %s does not" 11093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " match target port protoid: %s\n", i_port, 11103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EINVAL; 11123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_ptr = &i_port[3]; /* Skip over "fc." */ 11143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto check_newline; 11153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ptr = strstr(i_port, "iqn."); 11173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ptr) { 11183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { 11196708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Passed iSCSI Initiator Port %s does not" 11203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " match target port protoid: %s\n", i_port, 11213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EINVAL; 11233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger port_ptr = &i_port[0]; 11253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto check_newline; 11263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11276708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to locate prefix for emulated Initiator Port:" 11283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " %s\n", i_port); 11293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -EINVAL; 11303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 11313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Clear any trailing newline for the NAA WWN 11323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 11333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingercheck_newline: 11343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (i_port[strlen(i_port)-1] == '\n') 11353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger i_port[strlen(i_port)-1] = '\0'; 11363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = tcm_loop_make_nexus(tl_tpg, port_ptr); 11383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret < 0) 11393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ret; 11403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return count; 11423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 11433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas BellingerTF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); 11453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct configfs_attribute *tcm_loop_tpg_attrs[] = { 11473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_tpg_nexus.attr, 11483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger NULL, 11493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger}; 11503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* Start items for tcm_loop_naa_cit */ 11523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstruct se_portal_group *tcm_loop_make_naa_tpg( 11543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_wwn *wwn, 11553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct config_group *group, 11563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger const char *name) 11573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 11583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 11593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 11603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg; 11613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger char *tpgt_str, *end_ptr; 11623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret; 11633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger unsigned short int tpgt; 11643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tpgt_str = strstr(name, "tpgt_"); 11663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tpgt_str) { 11676708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to locate \"tpgt_#\" directory" 11683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " group\n"); 11693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ERR_PTR(-EINVAL); 11703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tpgt_str += 5; /* Skip ahead of "tpgt_" */ 11723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); 11733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 117412f09ccb4612734a53e47ed5302e0479c10a50f8Dan Carpenter if (tpgt >= TL_TPGS_PER_HBA) { 11756708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" 11763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " %u\n", tpgt, TL_TPGS_PER_HBA); 11773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ERR_PTR(-EINVAL); 11783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 11793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; 11803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg->tl_hba = tl_hba; 11813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_tpg->tl_tpgt = tpgt; 11823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 11833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Register the tl_tpg as a emulated SAS TCM Target Endpoint 11843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 11853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, 11865951146dea1ac8ff2f177477c907084d63913cadAndy Grover wwn, &tl_tpg->tl_se_tpg, tl_tpg, 11873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TRANSPORT_TPG_TYPE_NORMAL); 11883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret < 0) 11893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ERR_PTR(-ENOMEM); 11903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11916708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" 11923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 11933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 11943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return &tl_tpg->tl_se_tpg; 11963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 11973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 11983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingervoid tcm_loop_drop_naa_tpg( 11993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_portal_group *se_tpg) 12003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 12013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_wwn *wwn = se_tpg->se_tpg_wwn; 12023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 12033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 12043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 12053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger unsigned short tpgt; 12063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = tl_tpg->tl_hba; 12083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tpgt = tl_tpg->tl_tpgt; 12093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 12103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Release the I_T Nexus for the Virtual SAS link if present 12113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 12123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_drop_nexus(tl_tpg); 12133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 12143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint 12153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 12163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger core_tpg_deregister(se_tpg); 12173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12180a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger tl_tpg->tl_hba = NULL; 12190a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger tl_tpg->tl_tpgt = 0; 12200a020436d8baf412bcf5997aee7796276ea773aeNicholas Bellinger 12216708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" 12223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 12253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* End items for tcm_loop_naa_cit */ 12273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* Start items for tcm_loop_cit */ 12293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstruct se_wwn *tcm_loop_make_scsi_hba( 12313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct target_fabric_configfs *tf, 12323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct config_group *group, 12333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger const char *name) 12343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 12353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba; 12363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct Scsi_Host *sh; 12373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger char *ptr; 12383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret, off = 0; 12393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); 12413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tl_hba) { 12426708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate struct tcm_loop_hba\n"); 12433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ERR_PTR(-ENOMEM); 12443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 12453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 12463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Determine the emulated Protocol Identifier and Target Port Name 12473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * based on the incoming configfs directory name. 12483703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 12493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ptr = strstr(name, "naa."); 12503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ptr) { 12513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; 12523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto check_len; 12533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 12543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ptr = strstr(name, "fc."); 12553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ptr) { 12563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; 12573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger off = 3; /* Skip over "fc." */ 12583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto check_len; 12593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 12603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ptr = strstr(name, "iqn."); 1261a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl if (!ptr) { 12626708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to locate prefix for emulated Target " 1263a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl "Port: %s\n", name); 1264a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl ret = -EINVAL; 1265a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl goto out; 12663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 1267a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; 12683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingercheck_len: 127060d645a4e9e7e7ddc20e534fea82aa4e6947f911Dan Carpenter if (strlen(name) >= TL_WWN_ADDR_LEN) { 12716708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Emulated NAA %s Address: %s, exceeds" 12723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), 12733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TL_WWN_ADDR_LEN); 1274a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl ret = -EINVAL; 1275a57b5d36453cc9335f75ae191ffd682a250d08baJesper Juhl goto out; 12763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 12773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); 12783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 12803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Call device_register(tl_hba->dev) to register the emulated 12813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after 12823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * device_register() callbacks in tcm_loop_driver_probe() 12833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 12843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); 12853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret) 12863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger goto out; 12873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sh = tl_hba->sh; 12893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_hba_no_cnt++; 12906708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" 12913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " %s Address: %s at Linux/SCSI Host ID: %d\n", 12923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); 12933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 12943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return &tl_hba->tl_hba_wwn; 12953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerout: 12963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kfree(tl_hba); 12973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return ERR_PTR(ret); 12983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 12993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 13003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingervoid tcm_loop_drop_scsi_hba( 13013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct se_wwn *wwn) 13023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 13033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 13043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 13056297b07cbc42eb6b53eb88fce70a4727ea230797Nicholas Bellinger 13066297b07cbc42eb6b53eb88fce70a4727ea230797Nicholas Bellinger pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target" 13076297b07cbc42eb6b53eb88fce70a4727ea230797Nicholas Bellinger " SAS Address: %s at Linux/SCSI Host ID: %d\n", 13086297b07cbc42eb6b53eb88fce70a4727ea230797Nicholas Bellinger tl_hba->tl_wwn_address, tl_hba->sh->host_no); 13093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Call device_unregister() on the original tl_hba->dev. 13113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will 13123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * release *tl_hba; 13133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger device_unregister(&tl_hba->dev); 13153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 13163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 13173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* Start items for tcm_loop_cit */ 13183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic ssize_t tcm_loop_wwn_show_attr_version( 13193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct target_fabric_configfs *tf, 13203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger char *page) 13213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 13223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); 13233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 13243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 13253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas BellingerTF_WWN_ATTR_RO(tcm_loop, version); 13263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 13273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic struct configfs_attribute *tcm_loop_wwn_attrs[] = { 13283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_wwn_version.attr, 13293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger NULL, 13303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger}; 13313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 13323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger/* End items for tcm_loop_cit */ 13333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 13343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int tcm_loop_register_configfs(void) 13353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 13363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct target_fabric_configfs *fabric; 13373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger struct config_group *tf_cg; 13383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger int ret; 13393703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Set the TCM Loop HBA counter to zero 13413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_hba_no_cnt = 0; 13433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Register the top level struct config_item_type with TCM core 13453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); 1347e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover if (IS_ERR(fabric)) { 13486708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("tcm_loop_register_configfs() failed!\n"); 1349e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return PTR_ERR(fabric); 13503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 13513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Setup the fabric API of function pointers used by target_core_mod 13533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; 13553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; 13563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; 13573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; 13583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; 13593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; 13603703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id_len = 13613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_get_pr_transport_id_len; 13623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_parse_pr_out_transport_id = 13633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_parse_pr_out_transport_id; 13643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; 13653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_cache = 13663703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_check_demo_mode_cache; 13673703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_write_protect = 13683703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_check_demo_mode_write_protect; 13693703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_check_prod_mode_write_protect = 13703703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_check_prod_mode_write_protect; 13713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * The TCM loopback fabric module runs in demo-mode to a local 13733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * virtual SCSI device, so fabric dependent initator ACLs are 13743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * not required. 13753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; 13773703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_release_fabric_acl = 13783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_tpg_release_fabric_acl; 13793703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; 13803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Used for setting up remaining TCM resources in process context 13823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.new_cmd_map = &tcm_loop_new_cmd_map; 13843703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; 138535462975b2b197b990fedbb74b81f9bea9d344cbChristoph Hellwig fabric->tf_ops.release_cmd = &tcm_loop_release_cmd; 13863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; 13873703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.close_session = &tcm_loop_close_session; 13883703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.stop_session = &tcm_loop_stop_session; 13893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fall_back_to_erl0 = &tcm_loop_fall_back_to_erl0; 13903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.sess_logged_in = &tcm_loop_sess_logged_in; 13913703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; 13923703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.sess_get_initiator_sid = NULL; 13933703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.write_pending = &tcm_loop_write_pending; 13943703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; 13953703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 13963703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Not used for TCM loopback 13973703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 13983703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.set_default_node_attributes = 13993703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger &tcm_loop_set_default_node_attributes; 14003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; 14013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; 14023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; 14033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.queue_status = &tcm_loop_queue_status; 14043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; 14053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.set_fabric_sense_len = &tcm_loop_set_fabric_sense_len; 14063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.get_fabric_sense_len = &tcm_loop_get_fabric_sense_len; 14073703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.is_state_remove = &tcm_loop_is_state_remove; 14083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tf_cg = &fabric->tf_group; 14103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 14113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Setup function pointers for generic logic in target_core_fabric_configfs.c 14123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 14133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; 14143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; 14153703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; 14163703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; 14173703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 14183703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * fabric_post_link() and fabric_pre_unlink() are used for 14193703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * registration and release of TCM Loop Virtual SCSI LUNs. 14203703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 14213703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; 14223703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; 14233703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_make_np = NULL; 14243703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger fabric->tf_ops.fabric_drop_np = NULL; 14253703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 14263703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Setup default attribute lists for various fabric->tf_cit_tmpl 14273703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 14283703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; 14293703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; 14303703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; 14313703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; 14323703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; 14333703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 14343703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Once fabric->tf_ops has been setup, now register the fabric for 14353703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * use within TCM 14363703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 14373703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = target_fabric_configfs_register(fabric); 14383703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret < 0) { 14396708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("target_fabric_configfs_register() for" 14403703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " TCM_Loop failed!\n"); 14413703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger target_fabric_configfs_free(fabric); 14423703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return -1; 14433703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 14443703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger /* 14453703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger * Setup our local pointer to *fabric. 14463703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger */ 14473703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_fabric_configfs = fabric; 14486708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_LOOP[0] - Set fabric ->" 14493703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " tcm_loop_fabric_configfs\n"); 14503703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 14513703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 14523703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14533703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void tcm_loop_deregister_configfs(void) 14543703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 14553703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tcm_loop_fabric_configfs) 14563703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return; 14573703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14583703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger target_fabric_configfs_deregister(tcm_loop_fabric_configfs); 14593703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_fabric_configfs = NULL; 14606708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("TCM_LOOP[0] - Cleared" 14613703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " tcm_loop_fabric_configfs\n"); 14623703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 14633703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14643703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic int __init tcm_loop_fabric_init(void) 14653703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 1466afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig int ret = -ENOMEM; 1467afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 1468afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0); 1469afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig if (!tcm_loop_workqueue) 1470afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig goto out; 14713703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14723703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", 14733703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger sizeof(struct tcm_loop_cmd), 14743703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger __alignof__(struct tcm_loop_cmd), 14753703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 0, NULL); 14763703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (!tcm_loop_cmd_cache) { 14776708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("kmem_cache_create() for" 14783703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger " tcm_loop_cmd_cache failed\n"); 1479afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig goto out_destroy_workqueue; 14803703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger } 14813703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14823703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = tcm_loop_alloc_core_bus(); 14833703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger if (ret) 1484afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig goto out_destroy_cache; 14853703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14863703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger ret = tcm_loop_register_configfs(); 1487afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig if (ret) 1488afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig goto out_release_core_bus; 14893703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 14903703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger return 0; 1491afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig 1492afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigout_release_core_bus: 1493afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig tcm_loop_release_core_bus(); 1494afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigout_destroy_cache: 1495afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig kmem_cache_destroy(tcm_loop_cmd_cache); 1496afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigout_destroy_workqueue: 1497afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig destroy_workqueue(tcm_loop_workqueue); 1498afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwigout: 1499afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig return ret; 15003703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 15013703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 15023703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingerstatic void __exit tcm_loop_fabric_exit(void) 15033703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger{ 15043703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_deregister_configfs(); 15053703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger tcm_loop_release_core_bus(); 15063703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger kmem_cache_destroy(tcm_loop_cmd_cache); 1507afe2cb7fb111ac52ec95ab2bfb19d9d9e0d52ed8Christoph Hellwig destroy_workqueue(tcm_loop_workqueue); 15083703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger} 15093703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellinger 15103703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas BellingerMODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); 15113703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas BellingerMODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); 15123703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas BellingerMODULE_LICENSE("GPL"); 15133703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingermodule_init(tcm_loop_fabric_init); 15143703b2c5d041a68095cdd22380c23ce27d449ad7Nicholas Bellingermodule_exit(tcm_loop_fabric_exit); 1515