13703b2c5SNicholas Bellinger /******************************************************************************* 23703b2c5SNicholas Bellinger * 33703b2c5SNicholas Bellinger * This file contains the Linux/SCSI LLD virtual SCSI initiator driver 43703b2c5SNicholas Bellinger * for emulated SAS initiator ports 53703b2c5SNicholas Bellinger * 64c76251eSNicholas Bellinger * © Copyright 2011-2013 Datera, Inc. 73703b2c5SNicholas Bellinger * 83703b2c5SNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 93703b2c5SNicholas Bellinger * 103703b2c5SNicholas Bellinger * Author: Nicholas A. Bellinger <nab@risingtidesystems.com> 113703b2c5SNicholas Bellinger * 123703b2c5SNicholas Bellinger * This program is free software; you can redistribute it and/or modify 133703b2c5SNicholas Bellinger * it under the terms of the GNU General Public License as published by 143703b2c5SNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 153703b2c5SNicholas Bellinger * (at your option) any later version. 163703b2c5SNicholas Bellinger * 173703b2c5SNicholas Bellinger * This program is distributed in the hope that it will be useful, 183703b2c5SNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 193703b2c5SNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 203703b2c5SNicholas Bellinger * GNU General Public License for more details. 213703b2c5SNicholas Bellinger ****************************************************************************/ 223703b2c5SNicholas Bellinger 233703b2c5SNicholas Bellinger #include <linux/module.h> 243703b2c5SNicholas Bellinger #include <linux/moduleparam.h> 253703b2c5SNicholas Bellinger #include <linux/init.h> 263703b2c5SNicholas Bellinger #include <linux/slab.h> 273703b2c5SNicholas Bellinger #include <linux/types.h> 283703b2c5SNicholas Bellinger #include <linux/configfs.h> 293703b2c5SNicholas Bellinger #include <scsi/scsi.h> 303703b2c5SNicholas Bellinger #include <scsi/scsi_tcq.h> 313703b2c5SNicholas Bellinger #include <scsi/scsi_host.h> 323703b2c5SNicholas Bellinger #include <scsi/scsi_device.h> 333703b2c5SNicholas Bellinger #include <scsi/scsi_cmnd.h> 343703b2c5SNicholas Bellinger 353703b2c5SNicholas Bellinger #include <target/target_core_base.h> 36c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 373703b2c5SNicholas Bellinger #include <target/target_core_fabric_configfs.h> 383703b2c5SNicholas Bellinger #include <target/target_core_configfs.h> 393703b2c5SNicholas Bellinger 403703b2c5SNicholas Bellinger #include "tcm_loop.h" 413703b2c5SNicholas Bellinger 423703b2c5SNicholas Bellinger #define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev) 433703b2c5SNicholas Bellinger 443703b2c5SNicholas Bellinger /* Local pointer to allocated TCM configfs fabric module */ 453703b2c5SNicholas Bellinger static struct target_fabric_configfs *tcm_loop_fabric_configfs; 463703b2c5SNicholas Bellinger 47afe2cb7fSChristoph Hellwig static struct workqueue_struct *tcm_loop_workqueue; 483703b2c5SNicholas Bellinger static struct kmem_cache *tcm_loop_cmd_cache; 493703b2c5SNicholas Bellinger 503703b2c5SNicholas Bellinger static int tcm_loop_hba_no_cnt; 513703b2c5SNicholas Bellinger 5216786454SChristoph Hellwig static int tcm_loop_queue_status(struct se_cmd *se_cmd); 533703b2c5SNicholas Bellinger 543703b2c5SNicholas Bellinger /* 553703b2c5SNicholas Bellinger * Called from struct target_core_fabric_ops->check_stop_free() 563703b2c5SNicholas Bellinger */ 5788dd9e26SNicholas Bellinger static int tcm_loop_check_stop_free(struct se_cmd *se_cmd) 583703b2c5SNicholas Bellinger { 593703b2c5SNicholas Bellinger /* 603703b2c5SNicholas Bellinger * Do not release struct se_cmd's containing a valid TMR 613703b2c5SNicholas Bellinger * pointer. These will be released directly in tcm_loop_device_reset() 623703b2c5SNicholas Bellinger * with transport_generic_free_cmd(). 633703b2c5SNicholas Bellinger */ 64c8e31f26SAndy Grover if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) 6588dd9e26SNicholas Bellinger return 0; 663703b2c5SNicholas Bellinger /* 673703b2c5SNicholas Bellinger * Release the struct se_cmd, which will make a callback to release 683703b2c5SNicholas Bellinger * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd() 693703b2c5SNicholas Bellinger */ 7082f1c8a4SChristoph Hellwig transport_generic_free_cmd(se_cmd, 0); 7188dd9e26SNicholas Bellinger return 1; 723703b2c5SNicholas Bellinger } 733703b2c5SNicholas Bellinger 7435462975SChristoph Hellwig static void tcm_loop_release_cmd(struct se_cmd *se_cmd) 753703b2c5SNicholas Bellinger { 763703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 773703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 783703b2c5SNicholas Bellinger 793703b2c5SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 803703b2c5SNicholas Bellinger } 813703b2c5SNicholas Bellinger 828946b077SAl Viro static int tcm_loop_show_info(struct seq_file *m, struct Scsi_Host *host) 833703b2c5SNicholas Bellinger { 848946b077SAl Viro seq_printf(m, "tcm_loop_proc_info()\n"); 858946b077SAl Viro return 0; 863703b2c5SNicholas Bellinger } 873703b2c5SNicholas Bellinger 883703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *); 893703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *); 903703b2c5SNicholas Bellinger 913703b2c5SNicholas Bellinger static int pseudo_lld_bus_match(struct device *dev, 923703b2c5SNicholas Bellinger struct device_driver *dev_driver) 933703b2c5SNicholas Bellinger { 943703b2c5SNicholas Bellinger return 1; 953703b2c5SNicholas Bellinger } 963703b2c5SNicholas Bellinger 973703b2c5SNicholas Bellinger static struct bus_type tcm_loop_lld_bus = { 983703b2c5SNicholas Bellinger .name = "tcm_loop_bus", 993703b2c5SNicholas Bellinger .match = pseudo_lld_bus_match, 1003703b2c5SNicholas Bellinger .probe = tcm_loop_driver_probe, 1013703b2c5SNicholas Bellinger .remove = tcm_loop_driver_remove, 1023703b2c5SNicholas Bellinger }; 1033703b2c5SNicholas Bellinger 1043703b2c5SNicholas Bellinger static struct device_driver tcm_loop_driverfs = { 1053703b2c5SNicholas Bellinger .name = "tcm_loop", 1063703b2c5SNicholas Bellinger .bus = &tcm_loop_lld_bus, 1073703b2c5SNicholas Bellinger }; 1083703b2c5SNicholas Bellinger /* 1093703b2c5SNicholas Bellinger * Used with root_device_register() in tcm_loop_alloc_core_bus() below 1103703b2c5SNicholas Bellinger */ 1113703b2c5SNicholas Bellinger struct device *tcm_loop_primary; 1123703b2c5SNicholas Bellinger 1133703b2c5SNicholas Bellinger /* 1143703b2c5SNicholas Bellinger * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and 1153703b2c5SNicholas Bellinger * drivers/scsi/libiscsi.c:iscsi_change_queue_depth() 1163703b2c5SNicholas Bellinger */ 1173703b2c5SNicholas Bellinger static int tcm_loop_change_queue_depth( 1183703b2c5SNicholas Bellinger struct scsi_device *sdev, 1193703b2c5SNicholas Bellinger int depth, 1203703b2c5SNicholas Bellinger int reason) 1213703b2c5SNicholas Bellinger { 1223703b2c5SNicholas Bellinger switch (reason) { 1233703b2c5SNicholas Bellinger case SCSI_QDEPTH_DEFAULT: 1243703b2c5SNicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 1253703b2c5SNicholas Bellinger break; 1263703b2c5SNicholas Bellinger case SCSI_QDEPTH_QFULL: 1273703b2c5SNicholas Bellinger scsi_track_queue_full(sdev, depth); 1283703b2c5SNicholas Bellinger break; 1293703b2c5SNicholas Bellinger case SCSI_QDEPTH_RAMP_UP: 1303703b2c5SNicholas Bellinger scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); 1313703b2c5SNicholas Bellinger break; 1323703b2c5SNicholas Bellinger default: 1333703b2c5SNicholas Bellinger return -EOPNOTSUPP; 1343703b2c5SNicholas Bellinger } 1353703b2c5SNicholas Bellinger return sdev->queue_depth; 1363703b2c5SNicholas Bellinger } 1373703b2c5SNicholas Bellinger 1383703b2c5SNicholas Bellinger /* 139f872c9f4SChristoph Hellwig * Locate the SAM Task Attr from struct scsi_cmnd * 140f872c9f4SChristoph Hellwig */ 1416375f890SHannes Reinecke static int tcm_loop_sam_attr(struct scsi_cmnd *sc, int tag) 142f872c9f4SChristoph Hellwig { 1436375f890SHannes Reinecke if (sc->device->tagged_supported && 1446375f890SHannes Reinecke sc->device->ordered_tags && tag >= 0) 145f872c9f4SChristoph Hellwig return MSG_ORDERED_TAG; 146f872c9f4SChristoph Hellwig 147f872c9f4SChristoph Hellwig return MSG_SIMPLE_TAG; 148f872c9f4SChristoph Hellwig } 149f872c9f4SChristoph Hellwig 150afe2cb7fSChristoph Hellwig static void tcm_loop_submission_work(struct work_struct *work) 1513703b2c5SNicholas Bellinger { 152afe2cb7fSChristoph Hellwig struct tcm_loop_cmd *tl_cmd = 153afe2cb7fSChristoph Hellwig container_of(work, struct tcm_loop_cmd, work); 154afe2cb7fSChristoph Hellwig struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd; 155afe2cb7fSChristoph Hellwig struct scsi_cmnd *sc = tl_cmd->sc; 156afe2cb7fSChristoph Hellwig struct tcm_loop_nexus *tl_nexus; 1573703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 1583703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 15916786454SChristoph Hellwig struct scatterlist *sgl_bidi = NULL; 160e2a4f55cSSagi Grimberg u32 sgl_bidi_count = 0, transfer_length; 1618f9f44f8SNicholas Bellinger int rc; 162f872c9f4SChristoph Hellwig 1633703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 1643703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 165afe2cb7fSChristoph Hellwig 1660a020436SNicholas Bellinger /* 1670a020436SNicholas Bellinger * Ensure that this tl_tpg reference from the incoming sc->device->id 1680a020436SNicholas Bellinger * has already been configured via tcm_loop_make_naa_tpg(). 1690a020436SNicholas Bellinger */ 1700a020436SNicholas Bellinger if (!tl_tpg->tl_hba) { 1710a020436SNicholas Bellinger set_host_byte(sc, DID_NO_CONNECT); 172f872c9f4SChristoph Hellwig goto out_done; 1730a020436SNicholas Bellinger } 174fb2b2844SHannes Reinecke if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) { 175fb2b2844SHannes Reinecke set_host_byte(sc, DID_TRANSPORT_DISRUPTED); 176fb2b2844SHannes Reinecke goto out_done; 177fb2b2844SHannes Reinecke } 178f872c9f4SChristoph Hellwig tl_nexus = tl_hba->tl_nexus; 179f872c9f4SChristoph Hellwig if (!tl_nexus) { 180f872c9f4SChristoph Hellwig scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" 181f872c9f4SChristoph Hellwig " does not exist\n"); 182f872c9f4SChristoph Hellwig set_host_byte(sc, DID_ERROR); 183f872c9f4SChristoph Hellwig goto out_done; 1843703b2c5SNicholas Bellinger } 18516786454SChristoph Hellwig if (scsi_bidi_cmnd(sc)) { 18616786454SChristoph Hellwig struct scsi_data_buffer *sdb = scsi_in(sc); 18716786454SChristoph Hellwig 18816786454SChristoph Hellwig sgl_bidi = sdb->table.sgl; 18916786454SChristoph Hellwig sgl_bidi_count = sdb->table.nents; 190f872c9f4SChristoph Hellwig se_cmd->se_cmd_flags |= SCF_BIDI; 191f872c9f4SChristoph Hellwig 19216786454SChristoph Hellwig } 193b5b8e298SSagi Grimberg 194e2a4f55cSSagi Grimberg transfer_length = scsi_transfer_length(sc); 195e2a4f55cSSagi Grimberg if (!scsi_prot_sg_count(sc) && 196e2a4f55cSSagi Grimberg scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) { 197b5b8e298SSagi Grimberg se_cmd->prot_pto = true; 198e2a4f55cSSagi Grimberg /* 199e2a4f55cSSagi Grimberg * loopback transport doesn't support 200e2a4f55cSSagi Grimberg * WRITE_GENERATE, READ_STRIP protection 201e2a4f55cSSagi Grimberg * information operations, go ahead unprotected. 202e2a4f55cSSagi Grimberg */ 203e2a4f55cSSagi Grimberg transfer_length = scsi_bufflen(sc); 204e2a4f55cSSagi Grimberg } 205b5b8e298SSagi Grimberg 2068f9f44f8SNicholas Bellinger rc = target_submit_cmd_map_sgls(se_cmd, tl_nexus->se_sess, sc->cmnd, 2078f9f44f8SNicholas Bellinger &tl_cmd->tl_sense_buf[0], tl_cmd->sc->device->lun, 2086375f890SHannes Reinecke transfer_length, tcm_loop_sam_attr(sc, tl_cmd->sc_cmd_tag), 2098f9f44f8SNicholas Bellinger sc->sc_data_direction, 0, 2108f9f44f8SNicholas Bellinger scsi_sglist(sc), scsi_sg_count(sc), 21159dedde2SNicholas Bellinger sgl_bidi, sgl_bidi_count, 21259dedde2SNicholas Bellinger scsi_prot_sglist(sc), scsi_prot_sg_count(sc)); 2138f9f44f8SNicholas Bellinger if (rc < 0) { 214f872c9f4SChristoph Hellwig set_host_byte(sc, DID_NO_CONNECT); 215f872c9f4SChristoph Hellwig goto out_done; 216f872c9f4SChristoph Hellwig } 217afe2cb7fSChristoph Hellwig return; 218f872c9f4SChristoph Hellwig 219f872c9f4SChristoph Hellwig out_done: 220b43f1886SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 221f872c9f4SChristoph Hellwig sc->scsi_done(sc); 222afe2cb7fSChristoph Hellwig return; 223afe2cb7fSChristoph Hellwig } 224afe2cb7fSChristoph Hellwig 225afe2cb7fSChristoph Hellwig /* 226afe2cb7fSChristoph Hellwig * ->queuecommand can be and usually is called from interrupt context, so 227afe2cb7fSChristoph Hellwig * defer the actual submission to a workqueue. 228afe2cb7fSChristoph Hellwig */ 229afe2cb7fSChristoph Hellwig static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) 230afe2cb7fSChristoph Hellwig { 231afe2cb7fSChristoph Hellwig struct tcm_loop_cmd *tl_cmd; 232afe2cb7fSChristoph Hellwig 2339cb78c16SHannes Reinecke pr_debug("tcm_loop_queuecommand() %d:%d:%d:%llu got CDB: 0x%02x" 234afe2cb7fSChristoph Hellwig " scsi_buf_len: %u\n", sc->device->host->host_no, 235afe2cb7fSChristoph Hellwig sc->device->id, sc->device->channel, sc->device->lun, 236afe2cb7fSChristoph Hellwig sc->cmnd[0], scsi_bufflen(sc)); 237afe2cb7fSChristoph Hellwig 238afe2cb7fSChristoph Hellwig tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); 239afe2cb7fSChristoph Hellwig if (!tl_cmd) { 240afe2cb7fSChristoph Hellwig pr_err("Unable to allocate struct tcm_loop_cmd\n"); 241afe2cb7fSChristoph Hellwig set_host_byte(sc, DID_ERROR); 242afe2cb7fSChristoph Hellwig sc->scsi_done(sc); 243afe2cb7fSChristoph Hellwig return 0; 244afe2cb7fSChristoph Hellwig } 245afe2cb7fSChristoph Hellwig 246afe2cb7fSChristoph Hellwig tl_cmd->sc = sc; 2476375f890SHannes Reinecke tl_cmd->sc_cmd_tag = sc->request->tag; 248afe2cb7fSChristoph Hellwig INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); 249afe2cb7fSChristoph Hellwig queue_work(tcm_loop_workqueue, &tl_cmd->work); 250f872c9f4SChristoph Hellwig return 0; 2513703b2c5SNicholas Bellinger } 2523703b2c5SNicholas Bellinger 2533703b2c5SNicholas Bellinger /* 2543703b2c5SNicholas Bellinger * Called from SCSI EH process context to issue a LUN_RESET TMR 2553703b2c5SNicholas Bellinger * to struct scsi_device 2563703b2c5SNicholas Bellinger */ 257a314d700SHannes Reinecke static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, 258a314d700SHannes Reinecke struct tcm_loop_nexus *tl_nexus, 259969871cdSHannes Reinecke int lun, int task, enum tcm_tmreq_table tmr) 2603703b2c5SNicholas Bellinger { 2613703b2c5SNicholas Bellinger struct se_cmd *se_cmd = NULL; 2623703b2c5SNicholas Bellinger struct se_session *se_sess; 263a314d700SHannes Reinecke struct se_portal_group *se_tpg; 2643703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = NULL; 265a314d700SHannes Reinecke struct tcm_loop_tmr *tl_tmr = NULL; 266a314d700SHannes Reinecke int ret = TMR_FUNCTION_FAILED, rc; 267a314d700SHannes Reinecke 268a314d700SHannes Reinecke tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); 269a314d700SHannes Reinecke if (!tl_cmd) { 270a314d700SHannes Reinecke pr_err("Unable to allocate memory for tl_cmd\n"); 271a314d700SHannes Reinecke return ret; 272a314d700SHannes Reinecke } 273a314d700SHannes Reinecke 274a314d700SHannes Reinecke tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); 275a314d700SHannes Reinecke if (!tl_tmr) { 276a314d700SHannes Reinecke pr_err("Unable to allocate memory for tl_tmr\n"); 277a314d700SHannes Reinecke goto release; 278a314d700SHannes Reinecke } 279a314d700SHannes Reinecke init_waitqueue_head(&tl_tmr->tl_tmr_wait); 280a314d700SHannes Reinecke 281a314d700SHannes Reinecke se_cmd = &tl_cmd->tl_se_cmd; 282a314d700SHannes Reinecke se_tpg = &tl_tpg->tl_se_tpg; 283a314d700SHannes Reinecke se_sess = tl_nexus->se_sess; 284a314d700SHannes Reinecke /* 285a314d700SHannes Reinecke * Initialize struct se_cmd descriptor from target_core_mod infrastructure 286a314d700SHannes Reinecke */ 287a314d700SHannes Reinecke transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, 288a314d700SHannes Reinecke DMA_NONE, MSG_SIMPLE_TAG, 289a314d700SHannes Reinecke &tl_cmd->tl_sense_buf[0]); 290a314d700SHannes Reinecke 291a314d700SHannes Reinecke rc = core_tmr_alloc_req(se_cmd, tl_tmr, tmr, GFP_KERNEL); 292a314d700SHannes Reinecke if (rc < 0) 293a314d700SHannes Reinecke goto release; 294a314d700SHannes Reinecke 295969871cdSHannes Reinecke if (tmr == TMR_ABORT_TASK) 296969871cdSHannes Reinecke se_cmd->se_tmr_req->ref_task_tag = task; 297969871cdSHannes Reinecke 298a314d700SHannes Reinecke /* 299a314d700SHannes Reinecke * Locate the underlying TCM struct se_lun 300a314d700SHannes Reinecke */ 301a314d700SHannes Reinecke if (transport_lookup_tmr_lun(se_cmd, lun) < 0) { 302a314d700SHannes Reinecke ret = TMR_LUN_DOES_NOT_EXIST; 303a314d700SHannes Reinecke goto release; 304a314d700SHannes Reinecke } 305a314d700SHannes Reinecke /* 306a314d700SHannes Reinecke * Queue the TMR to TCM Core and sleep waiting for 307a314d700SHannes Reinecke * tcm_loop_queue_tm_rsp() to wake us up. 308a314d700SHannes Reinecke */ 309a314d700SHannes Reinecke transport_generic_handle_tmr(se_cmd); 310a314d700SHannes Reinecke wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); 311a314d700SHannes Reinecke /* 312a314d700SHannes Reinecke * The TMR LUN_RESET has completed, check the response status and 313a314d700SHannes Reinecke * then release allocations. 314a314d700SHannes Reinecke */ 315a314d700SHannes Reinecke ret = se_cmd->se_tmr_req->response; 316a314d700SHannes Reinecke release: 317a314d700SHannes Reinecke if (se_cmd) 318a314d700SHannes Reinecke transport_generic_free_cmd(se_cmd, 1); 319a314d700SHannes Reinecke else 320a314d700SHannes Reinecke kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 321a314d700SHannes Reinecke kfree(tl_tmr); 322a314d700SHannes Reinecke return ret; 323a314d700SHannes Reinecke } 324a314d700SHannes Reinecke 325969871cdSHannes Reinecke static int tcm_loop_abort_task(struct scsi_cmnd *sc) 326969871cdSHannes Reinecke { 327969871cdSHannes Reinecke struct tcm_loop_hba *tl_hba; 328969871cdSHannes Reinecke struct tcm_loop_nexus *tl_nexus; 329969871cdSHannes Reinecke struct tcm_loop_tpg *tl_tpg; 330969871cdSHannes Reinecke int ret = FAILED; 331969871cdSHannes Reinecke 332969871cdSHannes Reinecke /* 333969871cdSHannes Reinecke * Locate the tcm_loop_hba_t pointer 334969871cdSHannes Reinecke */ 335969871cdSHannes Reinecke tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 336969871cdSHannes Reinecke /* 337969871cdSHannes Reinecke * Locate the tl_nexus and se_sess pointers 338969871cdSHannes Reinecke */ 339969871cdSHannes Reinecke tl_nexus = tl_hba->tl_nexus; 340969871cdSHannes Reinecke if (!tl_nexus) { 341969871cdSHannes Reinecke pr_err("Unable to perform device reset without" 342969871cdSHannes Reinecke " active I_T Nexus\n"); 343969871cdSHannes Reinecke return FAILED; 344969871cdSHannes Reinecke } 345969871cdSHannes Reinecke 346969871cdSHannes Reinecke /* 347969871cdSHannes Reinecke * Locate the tl_tpg pointer from TargetID in sc->device->id 348969871cdSHannes Reinecke */ 349969871cdSHannes Reinecke tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 350969871cdSHannes Reinecke ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun, 3516375f890SHannes Reinecke sc->request->tag, TMR_ABORT_TASK); 352969871cdSHannes Reinecke return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; 353969871cdSHannes Reinecke } 354969871cdSHannes Reinecke 355a314d700SHannes Reinecke /* 356a314d700SHannes Reinecke * Called from SCSI EH process context to issue a LUN_RESET TMR 357a314d700SHannes Reinecke * to struct scsi_device 358a314d700SHannes Reinecke */ 359a314d700SHannes Reinecke static int tcm_loop_device_reset(struct scsi_cmnd *sc) 360a314d700SHannes Reinecke { 3613703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 3623703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 3633703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 364a314d700SHannes Reinecke int ret = FAILED; 365a314d700SHannes Reinecke 3663703b2c5SNicholas Bellinger /* 3673703b2c5SNicholas Bellinger * Locate the tcm_loop_hba_t pointer 3683703b2c5SNicholas Bellinger */ 3693703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3703703b2c5SNicholas Bellinger /* 3713703b2c5SNicholas Bellinger * Locate the tl_nexus and se_sess pointers 3723703b2c5SNicholas Bellinger */ 3733703b2c5SNicholas Bellinger tl_nexus = tl_hba->tl_nexus; 3743703b2c5SNicholas Bellinger if (!tl_nexus) { 3756708bb27SAndy Grover pr_err("Unable to perform device reset without" 3763703b2c5SNicholas Bellinger " active I_T Nexus\n"); 3773703b2c5SNicholas Bellinger return FAILED; 3783703b2c5SNicholas Bellinger } 3793703b2c5SNicholas Bellinger /* 380a314d700SHannes Reinecke * Locate the tl_tpg pointer from TargetID in sc->device->id 3813703b2c5SNicholas Bellinger */ 3823703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 383969871cdSHannes Reinecke ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun, 384969871cdSHannes Reinecke 0, TMR_LUN_RESET); 385a314d700SHannes Reinecke return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; 3863703b2c5SNicholas Bellinger } 3873703b2c5SNicholas Bellinger 3888f4a1fb0SHannes Reinecke static int tcm_loop_target_reset(struct scsi_cmnd *sc) 3898f4a1fb0SHannes Reinecke { 3908f4a1fb0SHannes Reinecke struct tcm_loop_hba *tl_hba; 3918f4a1fb0SHannes Reinecke struct tcm_loop_tpg *tl_tpg; 3928f4a1fb0SHannes Reinecke 3938f4a1fb0SHannes Reinecke /* 3948f4a1fb0SHannes Reinecke * Locate the tcm_loop_hba_t pointer 3958f4a1fb0SHannes Reinecke */ 3968f4a1fb0SHannes Reinecke tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3978f4a1fb0SHannes Reinecke if (!tl_hba) { 3988f4a1fb0SHannes Reinecke pr_err("Unable to perform device reset without" 3998f4a1fb0SHannes Reinecke " active I_T Nexus\n"); 4008f4a1fb0SHannes Reinecke return FAILED; 4018f4a1fb0SHannes Reinecke } 4028f4a1fb0SHannes Reinecke /* 4038f4a1fb0SHannes Reinecke * Locate the tl_tpg pointer from TargetID in sc->device->id 4048f4a1fb0SHannes Reinecke */ 4058f4a1fb0SHannes Reinecke tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 4068f4a1fb0SHannes Reinecke if (tl_tpg) { 4078f4a1fb0SHannes Reinecke tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; 4088f4a1fb0SHannes Reinecke return SUCCESS; 4098f4a1fb0SHannes Reinecke } 4108f4a1fb0SHannes Reinecke return FAILED; 4118f4a1fb0SHannes Reinecke } 4128f4a1fb0SHannes Reinecke 4133703b2c5SNicholas Bellinger static int tcm_loop_slave_alloc(struct scsi_device *sd) 4143703b2c5SNicholas Bellinger { 4153703b2c5SNicholas Bellinger set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); 4163703b2c5SNicholas Bellinger return 0; 4173703b2c5SNicholas Bellinger } 4183703b2c5SNicholas Bellinger 4193703b2c5SNicholas Bellinger static int tcm_loop_slave_configure(struct scsi_device *sd) 4203703b2c5SNicholas Bellinger { 421969871cdSHannes Reinecke if (sd->tagged_supported) { 422969871cdSHannes Reinecke scsi_activate_tcq(sd, sd->queue_depth); 423969871cdSHannes Reinecke scsi_adjust_queue_depth(sd, MSG_SIMPLE_TAG, 424969871cdSHannes Reinecke sd->host->cmd_per_lun); 425969871cdSHannes Reinecke } else { 426969871cdSHannes Reinecke scsi_adjust_queue_depth(sd, 0, 427969871cdSHannes Reinecke sd->host->cmd_per_lun); 428969871cdSHannes Reinecke } 429969871cdSHannes Reinecke 4303703b2c5SNicholas Bellinger return 0; 4313703b2c5SNicholas Bellinger } 4323703b2c5SNicholas Bellinger 4333703b2c5SNicholas Bellinger static struct scsi_host_template tcm_loop_driver_template = { 4348946b077SAl Viro .show_info = tcm_loop_show_info, 4353703b2c5SNicholas Bellinger .proc_name = "tcm_loopback", 4363703b2c5SNicholas Bellinger .name = "TCM_Loopback", 4373703b2c5SNicholas Bellinger .queuecommand = tcm_loop_queuecommand, 4383703b2c5SNicholas Bellinger .change_queue_depth = tcm_loop_change_queue_depth, 439a62182f3SChristoph Hellwig .change_queue_type = scsi_change_queue_type, 440969871cdSHannes Reinecke .eh_abort_handler = tcm_loop_abort_task, 4413703b2c5SNicholas Bellinger .eh_device_reset_handler = tcm_loop_device_reset, 4428f4a1fb0SHannes Reinecke .eh_target_reset_handler = tcm_loop_target_reset, 4432e88efd3SChristoph Hellwig .can_queue = 1024, 4443703b2c5SNicholas Bellinger .this_id = -1, 4452e88efd3SChristoph Hellwig .sg_tablesize = 256, 4462e88efd3SChristoph Hellwig .cmd_per_lun = 1024, 4472e88efd3SChristoph Hellwig .max_sectors = 0xFFFF, 4483703b2c5SNicholas Bellinger .use_clustering = DISABLE_CLUSTERING, 4493703b2c5SNicholas Bellinger .slave_alloc = tcm_loop_slave_alloc, 4503703b2c5SNicholas Bellinger .slave_configure = tcm_loop_slave_configure, 4513703b2c5SNicholas Bellinger .module = THIS_MODULE, 4523703b2c5SNicholas Bellinger }; 4533703b2c5SNicholas Bellinger 4543703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *dev) 4553703b2c5SNicholas Bellinger { 4563703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 4573703b2c5SNicholas Bellinger struct Scsi_Host *sh; 45859dedde2SNicholas Bellinger int error, host_prot; 4593703b2c5SNicholas Bellinger 4603703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4613703b2c5SNicholas Bellinger 4623703b2c5SNicholas Bellinger sh = scsi_host_alloc(&tcm_loop_driver_template, 4633703b2c5SNicholas Bellinger sizeof(struct tcm_loop_hba)); 4643703b2c5SNicholas Bellinger if (!sh) { 4656708bb27SAndy Grover pr_err("Unable to allocate struct scsi_host\n"); 4663703b2c5SNicholas Bellinger return -ENODEV; 4673703b2c5SNicholas Bellinger } 4683703b2c5SNicholas Bellinger tl_hba->sh = sh; 4693703b2c5SNicholas Bellinger 4703703b2c5SNicholas Bellinger /* 4713703b2c5SNicholas Bellinger * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata 4723703b2c5SNicholas Bellinger */ 4733703b2c5SNicholas Bellinger *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; 4743703b2c5SNicholas Bellinger /* 4753703b2c5SNicholas Bellinger * Setup single ID, Channel and LUN for now.. 4763703b2c5SNicholas Bellinger */ 4773703b2c5SNicholas Bellinger sh->max_id = 2; 4783703b2c5SNicholas Bellinger sh->max_lun = 0; 4793703b2c5SNicholas Bellinger sh->max_channel = 0; 4803703b2c5SNicholas Bellinger sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; 4813703b2c5SNicholas Bellinger 48259dedde2SNicholas Bellinger host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION | 48359dedde2SNicholas Bellinger SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION | 48459dedde2SNicholas Bellinger SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION; 48559dedde2SNicholas Bellinger 48659dedde2SNicholas Bellinger scsi_host_set_prot(sh, host_prot); 48759dedde2SNicholas Bellinger scsi_host_set_guard(sh, SHOST_DIX_GUARD_CRC); 48859dedde2SNicholas Bellinger 4893703b2c5SNicholas Bellinger error = scsi_add_host(sh, &tl_hba->dev); 4903703b2c5SNicholas Bellinger if (error) { 4916708bb27SAndy Grover pr_err("%s: scsi_add_host failed\n", __func__); 4923703b2c5SNicholas Bellinger scsi_host_put(sh); 4933703b2c5SNicholas Bellinger return -ENODEV; 4943703b2c5SNicholas Bellinger } 4953703b2c5SNicholas Bellinger return 0; 4963703b2c5SNicholas Bellinger } 4973703b2c5SNicholas Bellinger 4983703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *dev) 4993703b2c5SNicholas Bellinger { 5003703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 5013703b2c5SNicholas Bellinger struct Scsi_Host *sh; 5023703b2c5SNicholas Bellinger 5033703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 5043703b2c5SNicholas Bellinger sh = tl_hba->sh; 5053703b2c5SNicholas Bellinger 5063703b2c5SNicholas Bellinger scsi_remove_host(sh); 5073703b2c5SNicholas Bellinger scsi_host_put(sh); 5083703b2c5SNicholas Bellinger return 0; 5093703b2c5SNicholas Bellinger } 5103703b2c5SNicholas Bellinger 5113703b2c5SNicholas Bellinger static void tcm_loop_release_adapter(struct device *dev) 5123703b2c5SNicholas Bellinger { 5133703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); 5143703b2c5SNicholas Bellinger 5153703b2c5SNicholas Bellinger kfree(tl_hba); 5163703b2c5SNicholas Bellinger } 5173703b2c5SNicholas Bellinger 5183703b2c5SNicholas Bellinger /* 5193703b2c5SNicholas Bellinger * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c 5203703b2c5SNicholas Bellinger */ 5213703b2c5SNicholas Bellinger static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) 5223703b2c5SNicholas Bellinger { 5233703b2c5SNicholas Bellinger int ret; 5243703b2c5SNicholas Bellinger 5253703b2c5SNicholas Bellinger tl_hba->dev.bus = &tcm_loop_lld_bus; 5263703b2c5SNicholas Bellinger tl_hba->dev.parent = tcm_loop_primary; 5273703b2c5SNicholas Bellinger tl_hba->dev.release = &tcm_loop_release_adapter; 5283703b2c5SNicholas Bellinger dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); 5293703b2c5SNicholas Bellinger 5303703b2c5SNicholas Bellinger ret = device_register(&tl_hba->dev); 5313703b2c5SNicholas Bellinger if (ret) { 5326708bb27SAndy Grover pr_err("device_register() failed for" 5333703b2c5SNicholas Bellinger " tl_hba->dev: %d\n", ret); 5343703b2c5SNicholas Bellinger return -ENODEV; 5353703b2c5SNicholas Bellinger } 5363703b2c5SNicholas Bellinger 5373703b2c5SNicholas Bellinger return 0; 5383703b2c5SNicholas Bellinger } 5393703b2c5SNicholas Bellinger 5403703b2c5SNicholas Bellinger /* 5413703b2c5SNicholas Bellinger * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated 5423703b2c5SNicholas Bellinger * tcm_loop SCSI bus. 5433703b2c5SNicholas Bellinger */ 5443703b2c5SNicholas Bellinger static int tcm_loop_alloc_core_bus(void) 5453703b2c5SNicholas Bellinger { 5463703b2c5SNicholas Bellinger int ret; 5473703b2c5SNicholas Bellinger 5483703b2c5SNicholas Bellinger tcm_loop_primary = root_device_register("tcm_loop_0"); 5493703b2c5SNicholas Bellinger if (IS_ERR(tcm_loop_primary)) { 5506708bb27SAndy Grover pr_err("Unable to allocate tcm_loop_primary\n"); 5513703b2c5SNicholas Bellinger return PTR_ERR(tcm_loop_primary); 5523703b2c5SNicholas Bellinger } 5533703b2c5SNicholas Bellinger 5543703b2c5SNicholas Bellinger ret = bus_register(&tcm_loop_lld_bus); 5553703b2c5SNicholas Bellinger if (ret) { 5566708bb27SAndy Grover pr_err("bus_register() failed for tcm_loop_lld_bus\n"); 5573703b2c5SNicholas Bellinger goto dev_unreg; 5583703b2c5SNicholas Bellinger } 5593703b2c5SNicholas Bellinger 5603703b2c5SNicholas Bellinger ret = driver_register(&tcm_loop_driverfs); 5613703b2c5SNicholas Bellinger if (ret) { 5626708bb27SAndy Grover pr_err("driver_register() failed for" 5633703b2c5SNicholas Bellinger "tcm_loop_driverfs\n"); 5643703b2c5SNicholas Bellinger goto bus_unreg; 5653703b2c5SNicholas Bellinger } 5663703b2c5SNicholas Bellinger 5676708bb27SAndy Grover pr_debug("Initialized TCM Loop Core Bus\n"); 5683703b2c5SNicholas Bellinger return ret; 5693703b2c5SNicholas Bellinger 5703703b2c5SNicholas Bellinger bus_unreg: 5713703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5723703b2c5SNicholas Bellinger dev_unreg: 5733703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5743703b2c5SNicholas Bellinger return ret; 5753703b2c5SNicholas Bellinger } 5763703b2c5SNicholas Bellinger 5773703b2c5SNicholas Bellinger static void tcm_loop_release_core_bus(void) 5783703b2c5SNicholas Bellinger { 5793703b2c5SNicholas Bellinger driver_unregister(&tcm_loop_driverfs); 5803703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5813703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5823703b2c5SNicholas Bellinger 5836708bb27SAndy Grover pr_debug("Releasing TCM Loop Core BUS\n"); 5843703b2c5SNicholas Bellinger } 5853703b2c5SNicholas Bellinger 5863703b2c5SNicholas Bellinger static char *tcm_loop_get_fabric_name(void) 5873703b2c5SNicholas Bellinger { 5883703b2c5SNicholas Bellinger return "loopback"; 5893703b2c5SNicholas Bellinger } 5903703b2c5SNicholas Bellinger 5913703b2c5SNicholas Bellinger static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) 5923703b2c5SNicholas Bellinger { 5938359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 5943703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 5953703b2c5SNicholas Bellinger /* 5963703b2c5SNicholas Bellinger * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() 5973703b2c5SNicholas Bellinger * time based on the protocol dependent prefix of the passed configfs group. 5983703b2c5SNicholas Bellinger * 5993703b2c5SNicholas Bellinger * Based upon tl_proto_id, TCM_Loop emulates the requested fabric 6003703b2c5SNicholas Bellinger * ProtocolID using target_core_fabric_lib.c symbols. 6013703b2c5SNicholas Bellinger */ 6023703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6033703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6043703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 6053703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6063703b2c5SNicholas Bellinger return fc_get_fabric_proto_ident(se_tpg); 6073703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6083703b2c5SNicholas Bellinger return iscsi_get_fabric_proto_ident(se_tpg); 6093703b2c5SNicholas Bellinger default: 6106708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6113703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6123703b2c5SNicholas Bellinger break; 6133703b2c5SNicholas Bellinger } 6143703b2c5SNicholas Bellinger 6153703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 6163703b2c5SNicholas Bellinger } 6173703b2c5SNicholas Bellinger 6183703b2c5SNicholas Bellinger static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) 6193703b2c5SNicholas Bellinger { 6208359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6213703b2c5SNicholas Bellinger /* 6223703b2c5SNicholas Bellinger * Return the passed NAA identifier for the SAS Target Port 6233703b2c5SNicholas Bellinger */ 6243703b2c5SNicholas Bellinger return &tl_tpg->tl_hba->tl_wwn_address[0]; 6253703b2c5SNicholas Bellinger } 6263703b2c5SNicholas Bellinger 6273703b2c5SNicholas Bellinger static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) 6283703b2c5SNicholas Bellinger { 6298359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6303703b2c5SNicholas Bellinger /* 6313703b2c5SNicholas Bellinger * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 6323703b2c5SNicholas Bellinger * to represent the SCSI Target Port. 6333703b2c5SNicholas Bellinger */ 6343703b2c5SNicholas Bellinger return tl_tpg->tl_tpgt; 6353703b2c5SNicholas Bellinger } 6363703b2c5SNicholas Bellinger 6373703b2c5SNicholas Bellinger static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) 6383703b2c5SNicholas Bellinger { 6393703b2c5SNicholas Bellinger return 1; 6403703b2c5SNicholas Bellinger } 6413703b2c5SNicholas Bellinger 6423703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id( 6433703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6443703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6453703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6463703b2c5SNicholas Bellinger int *format_code, 6473703b2c5SNicholas Bellinger unsigned char *buf) 6483703b2c5SNicholas Bellinger { 6498359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6503703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6513703b2c5SNicholas Bellinger 6523703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6533703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6543703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6553703b2c5SNicholas Bellinger format_code, buf); 6563703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6573703b2c5SNicholas Bellinger return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6583703b2c5SNicholas Bellinger format_code, buf); 6593703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6603703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6613703b2c5SNicholas Bellinger format_code, buf); 6623703b2c5SNicholas Bellinger default: 6636708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6643703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6653703b2c5SNicholas Bellinger break; 6663703b2c5SNicholas Bellinger } 6673703b2c5SNicholas Bellinger 6683703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6693703b2c5SNicholas Bellinger format_code, buf); 6703703b2c5SNicholas Bellinger } 6713703b2c5SNicholas Bellinger 6723703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id_len( 6733703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6743703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6753703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6763703b2c5SNicholas Bellinger int *format_code) 6773703b2c5SNicholas Bellinger { 6788359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6793703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6803703b2c5SNicholas Bellinger 6813703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6823703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6833703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6843703b2c5SNicholas Bellinger format_code); 6853703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6863703b2c5SNicholas Bellinger return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6873703b2c5SNicholas Bellinger format_code); 6883703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6893703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6903703b2c5SNicholas Bellinger format_code); 6913703b2c5SNicholas Bellinger default: 6926708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6933703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6943703b2c5SNicholas Bellinger break; 6953703b2c5SNicholas Bellinger } 6963703b2c5SNicholas Bellinger 6973703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6983703b2c5SNicholas Bellinger format_code); 6993703b2c5SNicholas Bellinger } 7003703b2c5SNicholas Bellinger 7013703b2c5SNicholas Bellinger /* 7023703b2c5SNicholas Bellinger * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above 7033703b2c5SNicholas Bellinger * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. 7043703b2c5SNicholas Bellinger */ 7053703b2c5SNicholas Bellinger static char *tcm_loop_parse_pr_out_transport_id( 7063703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 7073703b2c5SNicholas Bellinger const char *buf, 7083703b2c5SNicholas Bellinger u32 *out_tid_len, 7093703b2c5SNicholas Bellinger char **port_nexus_ptr) 7103703b2c5SNicholas Bellinger { 7118359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 7123703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 7133703b2c5SNicholas Bellinger 7143703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 7153703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 7163703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7173703b2c5SNicholas Bellinger port_nexus_ptr); 7183703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 7193703b2c5SNicholas Bellinger return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7203703b2c5SNicholas Bellinger port_nexus_ptr); 7213703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 7223703b2c5SNicholas Bellinger return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7233703b2c5SNicholas Bellinger port_nexus_ptr); 7243703b2c5SNicholas Bellinger default: 7256708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 7263703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 7273703b2c5SNicholas Bellinger break; 7283703b2c5SNicholas Bellinger } 7293703b2c5SNicholas Bellinger 7303703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7313703b2c5SNicholas Bellinger port_nexus_ptr); 7323703b2c5SNicholas Bellinger } 7333703b2c5SNicholas Bellinger 7343703b2c5SNicholas Bellinger /* 7353703b2c5SNicholas Bellinger * Returning (1) here allows for target_core_mod struct se_node_acl to be generated 7363703b2c5SNicholas Bellinger * based upon the incoming fabric dependent SCSI Initiator Port 7373703b2c5SNicholas Bellinger */ 7383703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) 7393703b2c5SNicholas Bellinger { 7403703b2c5SNicholas Bellinger return 1; 7413703b2c5SNicholas Bellinger } 7423703b2c5SNicholas Bellinger 7433703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) 7443703b2c5SNicholas Bellinger { 7453703b2c5SNicholas Bellinger return 0; 7463703b2c5SNicholas Bellinger } 7473703b2c5SNicholas Bellinger 7483703b2c5SNicholas Bellinger /* 7493703b2c5SNicholas Bellinger * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for 7503703b2c5SNicholas Bellinger * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest 7513703b2c5SNicholas Bellinger */ 7523703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) 7533703b2c5SNicholas Bellinger { 7543703b2c5SNicholas Bellinger return 0; 7553703b2c5SNicholas Bellinger } 7563703b2c5SNicholas Bellinger 7573703b2c5SNicholas Bellinger /* 7583703b2c5SNicholas Bellinger * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will 7593703b2c5SNicholas Bellinger * never be called for TCM_Loop by target_core_fabric_configfs.c code. 7603703b2c5SNicholas Bellinger * It has been added here as a nop for target_fabric_tf_ops_check() 7613703b2c5SNicholas Bellinger */ 7623703b2c5SNicholas Bellinger static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) 7633703b2c5SNicholas Bellinger { 7643703b2c5SNicholas Bellinger return 0; 7653703b2c5SNicholas Bellinger } 7663703b2c5SNicholas Bellinger 7673703b2c5SNicholas Bellinger static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( 7683703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 7693703b2c5SNicholas Bellinger { 7703703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl; 7713703b2c5SNicholas Bellinger 7723703b2c5SNicholas Bellinger tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); 7733703b2c5SNicholas Bellinger if (!tl_nacl) { 7746708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_nacl\n"); 7753703b2c5SNicholas Bellinger return NULL; 7763703b2c5SNicholas Bellinger } 7773703b2c5SNicholas Bellinger 7783703b2c5SNicholas Bellinger return &tl_nacl->se_node_acl; 7793703b2c5SNicholas Bellinger } 7803703b2c5SNicholas Bellinger 7813703b2c5SNicholas Bellinger static void tcm_loop_tpg_release_fabric_acl( 7823703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 7833703b2c5SNicholas Bellinger struct se_node_acl *se_nacl) 7843703b2c5SNicholas Bellinger { 7853703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, 7863703b2c5SNicholas Bellinger struct tcm_loop_nacl, se_node_acl); 7873703b2c5SNicholas Bellinger 7883703b2c5SNicholas Bellinger kfree(tl_nacl); 7893703b2c5SNicholas Bellinger } 7903703b2c5SNicholas Bellinger 7913703b2c5SNicholas Bellinger static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) 7923703b2c5SNicholas Bellinger { 7933703b2c5SNicholas Bellinger return 1; 7943703b2c5SNicholas Bellinger } 7953703b2c5SNicholas Bellinger 7963703b2c5SNicholas Bellinger static u32 tcm_loop_sess_get_index(struct se_session *se_sess) 7973703b2c5SNicholas Bellinger { 7983703b2c5SNicholas Bellinger return 1; 7993703b2c5SNicholas Bellinger } 8003703b2c5SNicholas Bellinger 8013703b2c5SNicholas Bellinger static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) 8023703b2c5SNicholas Bellinger { 8033703b2c5SNicholas Bellinger return; 8043703b2c5SNicholas Bellinger } 8053703b2c5SNicholas Bellinger 8063703b2c5SNicholas Bellinger static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) 8073703b2c5SNicholas Bellinger { 808969871cdSHannes Reinecke struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 809969871cdSHannes Reinecke struct tcm_loop_cmd, tl_se_cmd); 810969871cdSHannes Reinecke 811969871cdSHannes Reinecke return tl_cmd->sc_cmd_tag; 8123703b2c5SNicholas Bellinger } 8133703b2c5SNicholas Bellinger 8143703b2c5SNicholas Bellinger static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) 8153703b2c5SNicholas Bellinger { 8163703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8173703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8183703b2c5SNicholas Bellinger 8193703b2c5SNicholas Bellinger return tl_cmd->sc_cmd_state; 8203703b2c5SNicholas Bellinger } 8213703b2c5SNicholas Bellinger 8223703b2c5SNicholas Bellinger static int tcm_loop_shutdown_session(struct se_session *se_sess) 8233703b2c5SNicholas Bellinger { 8243703b2c5SNicholas Bellinger return 0; 8253703b2c5SNicholas Bellinger } 8263703b2c5SNicholas Bellinger 8273703b2c5SNicholas Bellinger static void tcm_loop_close_session(struct se_session *se_sess) 8283703b2c5SNicholas Bellinger { 8293703b2c5SNicholas Bellinger return; 8303703b2c5SNicholas Bellinger }; 8313703b2c5SNicholas Bellinger 8323703b2c5SNicholas Bellinger static int tcm_loop_write_pending(struct se_cmd *se_cmd) 8333703b2c5SNicholas Bellinger { 8343703b2c5SNicholas Bellinger /* 8353703b2c5SNicholas Bellinger * Since Linux/SCSI has already sent down a struct scsi_cmnd 8363703b2c5SNicholas Bellinger * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array 8373703b2c5SNicholas Bellinger * memory, and memory has already been mapped to struct se_cmd->t_mem_list 8383703b2c5SNicholas Bellinger * format with transport_generic_map_mem_to_cmd(). 8393703b2c5SNicholas Bellinger * 8403703b2c5SNicholas Bellinger * We now tell TCM to add this WRITE CDB directly into the TCM storage 8413703b2c5SNicholas Bellinger * object execution queue. 8423703b2c5SNicholas Bellinger */ 84370baf0abSChristoph Hellwig target_execute_cmd(se_cmd); 8443703b2c5SNicholas Bellinger return 0; 8453703b2c5SNicholas Bellinger } 8463703b2c5SNicholas Bellinger 8473703b2c5SNicholas Bellinger static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) 8483703b2c5SNicholas Bellinger { 8493703b2c5SNicholas Bellinger return 0; 8503703b2c5SNicholas Bellinger } 8513703b2c5SNicholas Bellinger 8523703b2c5SNicholas Bellinger static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) 8533703b2c5SNicholas Bellinger { 8543703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8553703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8563703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8573703b2c5SNicholas Bellinger 8586708bb27SAndy Grover pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" 8593703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8603703b2c5SNicholas Bellinger 8613703b2c5SNicholas Bellinger sc->result = SAM_STAT_GOOD; 8623703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8636cf3fa69SRoland Dreier if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || 8646cf3fa69SRoland Dreier (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) 8656cf3fa69SRoland Dreier scsi_set_resid(sc, se_cmd->residual_count); 8663703b2c5SNicholas Bellinger sc->scsi_done(sc); 8673703b2c5SNicholas Bellinger return 0; 8683703b2c5SNicholas Bellinger } 8693703b2c5SNicholas Bellinger 8703703b2c5SNicholas Bellinger static int tcm_loop_queue_status(struct se_cmd *se_cmd) 8713703b2c5SNicholas Bellinger { 8723703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8733703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8743703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8753703b2c5SNicholas Bellinger 8766708bb27SAndy Grover pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" 8773703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8783703b2c5SNicholas Bellinger 8793703b2c5SNicholas Bellinger if (se_cmd->sense_buffer && 8803703b2c5SNicholas Bellinger ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 8813703b2c5SNicholas Bellinger (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 8823703b2c5SNicholas Bellinger 8835951146dSAndy Grover memcpy(sc->sense_buffer, se_cmd->sense_buffer, 8843703b2c5SNicholas Bellinger SCSI_SENSE_BUFFERSIZE); 8853703b2c5SNicholas Bellinger sc->result = SAM_STAT_CHECK_CONDITION; 8863703b2c5SNicholas Bellinger set_driver_byte(sc, DRIVER_SENSE); 8873703b2c5SNicholas Bellinger } else 8883703b2c5SNicholas Bellinger sc->result = se_cmd->scsi_status; 8893703b2c5SNicholas Bellinger 8903703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8916cf3fa69SRoland Dreier if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || 8926cf3fa69SRoland Dreier (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) 8936cf3fa69SRoland Dreier scsi_set_resid(sc, se_cmd->residual_count); 8943703b2c5SNicholas Bellinger sc->scsi_done(sc); 8953703b2c5SNicholas Bellinger return 0; 8963703b2c5SNicholas Bellinger } 8973703b2c5SNicholas Bellinger 898b79fafacSJoern Engel static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) 8993703b2c5SNicholas Bellinger { 9003703b2c5SNicholas Bellinger struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 9013703b2c5SNicholas Bellinger struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; 9023703b2c5SNicholas Bellinger /* 9033703b2c5SNicholas Bellinger * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead 9043703b2c5SNicholas Bellinger * and wake up the wait_queue_head_t in tcm_loop_device_reset() 9053703b2c5SNicholas Bellinger */ 9063703b2c5SNicholas Bellinger atomic_set(&tl_tmr->tmr_complete, 1); 9073703b2c5SNicholas Bellinger wake_up(&tl_tmr->tl_tmr_wait); 9083703b2c5SNicholas Bellinger } 9093703b2c5SNicholas Bellinger 910131e6abcSNicholas Bellinger static void tcm_loop_aborted_task(struct se_cmd *se_cmd) 911131e6abcSNicholas Bellinger { 912131e6abcSNicholas Bellinger return; 913131e6abcSNicholas Bellinger } 914131e6abcSNicholas Bellinger 9153703b2c5SNicholas Bellinger static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) 9163703b2c5SNicholas Bellinger { 9173703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 9183703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 9193703b2c5SNicholas Bellinger return "SAS"; 9203703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 9213703b2c5SNicholas Bellinger return "FCP"; 9223703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 9233703b2c5SNicholas Bellinger return "iSCSI"; 9243703b2c5SNicholas Bellinger default: 9253703b2c5SNicholas Bellinger break; 9263703b2c5SNicholas Bellinger } 9273703b2c5SNicholas Bellinger 9283703b2c5SNicholas Bellinger return "Unknown"; 9293703b2c5SNicholas Bellinger } 9303703b2c5SNicholas Bellinger 9313703b2c5SNicholas Bellinger /* Start items for tcm_loop_port_cit */ 9323703b2c5SNicholas Bellinger 9333703b2c5SNicholas Bellinger static int tcm_loop_port_link( 9343703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9353703b2c5SNicholas Bellinger struct se_lun *lun) 9363703b2c5SNicholas Bellinger { 9373703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 9383703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 9393703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9403703b2c5SNicholas Bellinger 94133940d09SJoern Engel atomic_inc_mb(&tl_tpg->tl_tpg_port_count); 9423703b2c5SNicholas Bellinger /* 9433703b2c5SNicholas Bellinger * Add Linux/SCSI struct scsi_device by HCTL 9443703b2c5SNicholas Bellinger */ 9453703b2c5SNicholas Bellinger scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); 9463703b2c5SNicholas Bellinger 9476708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); 9483703b2c5SNicholas Bellinger return 0; 9493703b2c5SNicholas Bellinger } 9503703b2c5SNicholas Bellinger 9513703b2c5SNicholas Bellinger static void tcm_loop_port_unlink( 9523703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9533703b2c5SNicholas Bellinger struct se_lun *se_lun) 9543703b2c5SNicholas Bellinger { 9553703b2c5SNicholas Bellinger struct scsi_device *sd; 9563703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 9573703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 9583703b2c5SNicholas Bellinger 9593703b2c5SNicholas Bellinger tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); 9603703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 9613703b2c5SNicholas Bellinger 9623703b2c5SNicholas Bellinger sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, 9633703b2c5SNicholas Bellinger se_lun->unpacked_lun); 9643703b2c5SNicholas Bellinger if (!sd) { 9656708bb27SAndy Grover pr_err("Unable to locate struct scsi_device for %d:%d:" 9663703b2c5SNicholas Bellinger "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); 9673703b2c5SNicholas Bellinger return; 9683703b2c5SNicholas Bellinger } 9693703b2c5SNicholas Bellinger /* 9703703b2c5SNicholas Bellinger * Remove Linux/SCSI struct scsi_device by HCTL 9713703b2c5SNicholas Bellinger */ 9723703b2c5SNicholas Bellinger scsi_remove_device(sd); 9733703b2c5SNicholas Bellinger scsi_device_put(sd); 9743703b2c5SNicholas Bellinger 97533940d09SJoern Engel atomic_dec_mb(&tl_tpg->tl_tpg_port_count); 9763703b2c5SNicholas Bellinger 9776708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); 9783703b2c5SNicholas Bellinger } 9793703b2c5SNicholas Bellinger 9803703b2c5SNicholas Bellinger /* End items for tcm_loop_port_cit */ 9813703b2c5SNicholas Bellinger 9823703b2c5SNicholas Bellinger /* Start items for tcm_loop_nexus_cit */ 9833703b2c5SNicholas Bellinger 9843703b2c5SNicholas Bellinger static int tcm_loop_make_nexus( 9853703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg, 9863703b2c5SNicholas Bellinger const char *name) 9873703b2c5SNicholas Bellinger { 9883703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 9893703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9903703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 991552523dcSDan Carpenter int ret = -ENOMEM; 9923703b2c5SNicholas Bellinger 9933703b2c5SNicholas Bellinger if (tl_tpg->tl_hba->tl_nexus) { 9946708bb27SAndy Grover pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n"); 9953703b2c5SNicholas Bellinger return -EEXIST; 9963703b2c5SNicholas Bellinger } 9973703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 9983703b2c5SNicholas Bellinger 9993703b2c5SNicholas Bellinger tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); 10003703b2c5SNicholas Bellinger if (!tl_nexus) { 10016708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_nexus\n"); 10023703b2c5SNicholas Bellinger return -ENOMEM; 10033703b2c5SNicholas Bellinger } 10043703b2c5SNicholas Bellinger /* 10053703b2c5SNicholas Bellinger * Initialize the struct se_session pointer 10063703b2c5SNicholas Bellinger */ 1007e70beee7SNicholas Bellinger tl_nexus->se_sess = transport_init_session(TARGET_PROT_ALL); 1008552523dcSDan Carpenter if (IS_ERR(tl_nexus->se_sess)) { 1009552523dcSDan Carpenter ret = PTR_ERR(tl_nexus->se_sess); 10103703b2c5SNicholas Bellinger goto out; 1011552523dcSDan Carpenter } 10123703b2c5SNicholas Bellinger /* 10133703b2c5SNicholas Bellinger * Since we are running in 'demo mode' this call with generate a 10143703b2c5SNicholas Bellinger * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI 10153703b2c5SNicholas Bellinger * Initiator port name of the passed configfs group 'name'. 10163703b2c5SNicholas Bellinger */ 10173703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( 10183703b2c5SNicholas Bellinger se_tpg, (unsigned char *)name); 10193703b2c5SNicholas Bellinger if (!tl_nexus->se_sess->se_node_acl) { 10203703b2c5SNicholas Bellinger transport_free_session(tl_nexus->se_sess); 10213703b2c5SNicholas Bellinger goto out; 10223703b2c5SNicholas Bellinger } 10233703b2c5SNicholas Bellinger /* 10243703b2c5SNicholas Bellinger * Now, register the SAS I_T Nexus as active with the call to 10253703b2c5SNicholas Bellinger * transport_register_session() 10263703b2c5SNicholas Bellinger */ 10273703b2c5SNicholas Bellinger __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, 10285951146dSAndy Grover tl_nexus->se_sess, tl_nexus); 10293703b2c5SNicholas Bellinger tl_tpg->tl_hba->tl_nexus = tl_nexus; 10306708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" 10313703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10323703b2c5SNicholas Bellinger name); 10333703b2c5SNicholas Bellinger return 0; 10343703b2c5SNicholas Bellinger 10353703b2c5SNicholas Bellinger out: 10363703b2c5SNicholas Bellinger kfree(tl_nexus); 1037552523dcSDan Carpenter return ret; 10383703b2c5SNicholas Bellinger } 10393703b2c5SNicholas Bellinger 10403703b2c5SNicholas Bellinger static int tcm_loop_drop_nexus( 10413703b2c5SNicholas Bellinger struct tcm_loop_tpg *tpg) 10423703b2c5SNicholas Bellinger { 10433703b2c5SNicholas Bellinger struct se_session *se_sess; 10443703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10453703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tpg->tl_hba; 10463703b2c5SNicholas Bellinger 10471ec59feeSHannes Reinecke if (!tl_hba) 10481ec59feeSHannes Reinecke return -ENODEV; 10491ec59feeSHannes Reinecke 10501ec59feeSHannes Reinecke tl_nexus = tl_hba->tl_nexus; 10513703b2c5SNicholas Bellinger if (!tl_nexus) 10523703b2c5SNicholas Bellinger return -ENODEV; 10533703b2c5SNicholas Bellinger 10543703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 10553703b2c5SNicholas Bellinger if (!se_sess) 10563703b2c5SNicholas Bellinger return -ENODEV; 10573703b2c5SNicholas Bellinger 10583703b2c5SNicholas Bellinger if (atomic_read(&tpg->tl_tpg_port_count)) { 10596708bb27SAndy Grover pr_err("Unable to remove TCM_Loop I_T Nexus with" 10603703b2c5SNicholas Bellinger " active TPG port count: %d\n", 10613703b2c5SNicholas Bellinger atomic_read(&tpg->tl_tpg_port_count)); 10623703b2c5SNicholas Bellinger return -EPERM; 10633703b2c5SNicholas Bellinger } 10643703b2c5SNicholas Bellinger 10656708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" 10663703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10673703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10683703b2c5SNicholas Bellinger /* 10693703b2c5SNicholas Bellinger * Release the SCSI I_T Nexus to the emulated SAS Target Port 10703703b2c5SNicholas Bellinger */ 10713703b2c5SNicholas Bellinger transport_deregister_session(tl_nexus->se_sess); 10723703b2c5SNicholas Bellinger tpg->tl_hba->tl_nexus = NULL; 10733703b2c5SNicholas Bellinger kfree(tl_nexus); 10743703b2c5SNicholas Bellinger return 0; 10753703b2c5SNicholas Bellinger } 10763703b2c5SNicholas Bellinger 10773703b2c5SNicholas Bellinger /* End items for tcm_loop_nexus_cit */ 10783703b2c5SNicholas Bellinger 10793703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_show_nexus( 10803703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 10813703b2c5SNicholas Bellinger char *page) 10823703b2c5SNicholas Bellinger { 10833703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 10843703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 10853703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10863703b2c5SNicholas Bellinger ssize_t ret; 10873703b2c5SNicholas Bellinger 10883703b2c5SNicholas Bellinger tl_nexus = tl_tpg->tl_hba->tl_nexus; 10893703b2c5SNicholas Bellinger if (!tl_nexus) 10903703b2c5SNicholas Bellinger return -ENODEV; 10913703b2c5SNicholas Bellinger 10923703b2c5SNicholas Bellinger ret = snprintf(page, PAGE_SIZE, "%s\n", 10933703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10943703b2c5SNicholas Bellinger 10953703b2c5SNicholas Bellinger return ret; 10963703b2c5SNicholas Bellinger } 10973703b2c5SNicholas Bellinger 10983703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_store_nexus( 10993703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 11003703b2c5SNicholas Bellinger const char *page, 11013703b2c5SNicholas Bellinger size_t count) 11023703b2c5SNicholas Bellinger { 11033703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 11043703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 11053703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 11063703b2c5SNicholas Bellinger unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; 11073703b2c5SNicholas Bellinger int ret; 11083703b2c5SNicholas Bellinger /* 11093703b2c5SNicholas Bellinger * Shutdown the active I_T nexus if 'NULL' is passed.. 11103703b2c5SNicholas Bellinger */ 11113703b2c5SNicholas Bellinger if (!strncmp(page, "NULL", 4)) { 11123703b2c5SNicholas Bellinger ret = tcm_loop_drop_nexus(tl_tpg); 11133703b2c5SNicholas Bellinger return (!ret) ? count : ret; 11143703b2c5SNicholas Bellinger } 11153703b2c5SNicholas Bellinger /* 11163703b2c5SNicholas Bellinger * Otherwise make sure the passed virtual Initiator port WWN matches 11173703b2c5SNicholas Bellinger * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call 11183703b2c5SNicholas Bellinger * tcm_loop_make_nexus() 11193703b2c5SNicholas Bellinger */ 112060d645a4SDan Carpenter if (strlen(page) >= TL_WWN_ADDR_LEN) { 11216708bb27SAndy Grover pr_err("Emulated NAA Sas Address: %s, exceeds" 11223703b2c5SNicholas Bellinger " max: %d\n", page, TL_WWN_ADDR_LEN); 11233703b2c5SNicholas Bellinger return -EINVAL; 11243703b2c5SNicholas Bellinger } 11253703b2c5SNicholas Bellinger snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); 11263703b2c5SNicholas Bellinger 11273703b2c5SNicholas Bellinger ptr = strstr(i_port, "naa."); 11283703b2c5SNicholas Bellinger if (ptr) { 11293703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { 11306708bb27SAndy Grover pr_err("Passed SAS Initiator Port %s does not" 11313703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11323703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11333703b2c5SNicholas Bellinger return -EINVAL; 11343703b2c5SNicholas Bellinger } 11353703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11363703b2c5SNicholas Bellinger goto check_newline; 11373703b2c5SNicholas Bellinger } 11383703b2c5SNicholas Bellinger ptr = strstr(i_port, "fc."); 11393703b2c5SNicholas Bellinger if (ptr) { 11403703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { 11416708bb27SAndy Grover pr_err("Passed FCP Initiator Port %s does not" 11423703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11433703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11443703b2c5SNicholas Bellinger return -EINVAL; 11453703b2c5SNicholas Bellinger } 11463703b2c5SNicholas Bellinger port_ptr = &i_port[3]; /* Skip over "fc." */ 11473703b2c5SNicholas Bellinger goto check_newline; 11483703b2c5SNicholas Bellinger } 11493703b2c5SNicholas Bellinger ptr = strstr(i_port, "iqn."); 11503703b2c5SNicholas Bellinger if (ptr) { 11513703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { 11526708bb27SAndy Grover pr_err("Passed iSCSI Initiator Port %s does not" 11533703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11543703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11553703b2c5SNicholas Bellinger return -EINVAL; 11563703b2c5SNicholas Bellinger } 11573703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11583703b2c5SNicholas Bellinger goto check_newline; 11593703b2c5SNicholas Bellinger } 11606708bb27SAndy Grover pr_err("Unable to locate prefix for emulated Initiator Port:" 11613703b2c5SNicholas Bellinger " %s\n", i_port); 11623703b2c5SNicholas Bellinger return -EINVAL; 11633703b2c5SNicholas Bellinger /* 11643703b2c5SNicholas Bellinger * Clear any trailing newline for the NAA WWN 11653703b2c5SNicholas Bellinger */ 11663703b2c5SNicholas Bellinger check_newline: 11673703b2c5SNicholas Bellinger if (i_port[strlen(i_port)-1] == '\n') 11683703b2c5SNicholas Bellinger i_port[strlen(i_port)-1] = '\0'; 11693703b2c5SNicholas Bellinger 11703703b2c5SNicholas Bellinger ret = tcm_loop_make_nexus(tl_tpg, port_ptr); 11713703b2c5SNicholas Bellinger if (ret < 0) 11723703b2c5SNicholas Bellinger return ret; 11733703b2c5SNicholas Bellinger 11743703b2c5SNicholas Bellinger return count; 11753703b2c5SNicholas Bellinger } 11763703b2c5SNicholas Bellinger 11773703b2c5SNicholas Bellinger TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); 11783703b2c5SNicholas Bellinger 1179fb2b2844SHannes Reinecke static ssize_t tcm_loop_tpg_show_transport_status( 1180fb2b2844SHannes Reinecke struct se_portal_group *se_tpg, 1181fb2b2844SHannes Reinecke char *page) 1182fb2b2844SHannes Reinecke { 1183fb2b2844SHannes Reinecke struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 1184fb2b2844SHannes Reinecke struct tcm_loop_tpg, tl_se_tpg); 1185fb2b2844SHannes Reinecke const char *status = NULL; 1186fb2b2844SHannes Reinecke ssize_t ret = -EINVAL; 1187fb2b2844SHannes Reinecke 1188fb2b2844SHannes Reinecke switch (tl_tpg->tl_transport_status) { 1189fb2b2844SHannes Reinecke case TCM_TRANSPORT_ONLINE: 1190fb2b2844SHannes Reinecke status = "online"; 1191fb2b2844SHannes Reinecke break; 1192fb2b2844SHannes Reinecke case TCM_TRANSPORT_OFFLINE: 1193fb2b2844SHannes Reinecke status = "offline"; 1194fb2b2844SHannes Reinecke break; 1195fb2b2844SHannes Reinecke default: 1196fb2b2844SHannes Reinecke break; 1197fb2b2844SHannes Reinecke } 1198fb2b2844SHannes Reinecke 1199fb2b2844SHannes Reinecke if (status) 1200fb2b2844SHannes Reinecke ret = snprintf(page, PAGE_SIZE, "%s\n", status); 1201fb2b2844SHannes Reinecke 1202fb2b2844SHannes Reinecke return ret; 1203fb2b2844SHannes Reinecke } 1204fb2b2844SHannes Reinecke 1205fb2b2844SHannes Reinecke static ssize_t tcm_loop_tpg_store_transport_status( 1206fb2b2844SHannes Reinecke struct se_portal_group *se_tpg, 1207fb2b2844SHannes Reinecke const char *page, 1208fb2b2844SHannes Reinecke size_t count) 1209fb2b2844SHannes Reinecke { 1210fb2b2844SHannes Reinecke struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 1211fb2b2844SHannes Reinecke struct tcm_loop_tpg, tl_se_tpg); 1212fb2b2844SHannes Reinecke 1213fb2b2844SHannes Reinecke if (!strncmp(page, "online", 6)) { 1214fb2b2844SHannes Reinecke tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; 1215fb2b2844SHannes Reinecke return count; 1216fb2b2844SHannes Reinecke } 1217fb2b2844SHannes Reinecke if (!strncmp(page, "offline", 7)) { 1218fb2b2844SHannes Reinecke tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE; 1219fb2b2844SHannes Reinecke return count; 1220fb2b2844SHannes Reinecke } 1221fb2b2844SHannes Reinecke return -EINVAL; 1222fb2b2844SHannes Reinecke } 1223fb2b2844SHannes Reinecke 1224fb2b2844SHannes Reinecke TF_TPG_BASE_ATTR(tcm_loop, transport_status, S_IRUGO | S_IWUSR); 1225fb2b2844SHannes Reinecke 12263703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_tpg_attrs[] = { 12273703b2c5SNicholas Bellinger &tcm_loop_tpg_nexus.attr, 1228fb2b2844SHannes Reinecke &tcm_loop_tpg_transport_status.attr, 12293703b2c5SNicholas Bellinger NULL, 12303703b2c5SNicholas Bellinger }; 12313703b2c5SNicholas Bellinger 12323703b2c5SNicholas Bellinger /* Start items for tcm_loop_naa_cit */ 12333703b2c5SNicholas Bellinger 1234f0a6c693SRashika Kheria static struct se_portal_group *tcm_loop_make_naa_tpg( 12353703b2c5SNicholas Bellinger struct se_wwn *wwn, 12363703b2c5SNicholas Bellinger struct config_group *group, 12373703b2c5SNicholas Bellinger const char *name) 12383703b2c5SNicholas Bellinger { 12393703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 12403703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 12413703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 12423703b2c5SNicholas Bellinger char *tpgt_str, *end_ptr; 12433703b2c5SNicholas Bellinger int ret; 12443703b2c5SNicholas Bellinger unsigned short int tpgt; 12453703b2c5SNicholas Bellinger 12463703b2c5SNicholas Bellinger tpgt_str = strstr(name, "tpgt_"); 12473703b2c5SNicholas Bellinger if (!tpgt_str) { 12486708bb27SAndy Grover pr_err("Unable to locate \"tpgt_#\" directory" 12493703b2c5SNicholas Bellinger " group\n"); 12503703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12513703b2c5SNicholas Bellinger } 12523703b2c5SNicholas Bellinger tpgt_str += 5; /* Skip ahead of "tpgt_" */ 12533703b2c5SNicholas Bellinger tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); 12543703b2c5SNicholas Bellinger 125512f09ccbSDan Carpenter if (tpgt >= TL_TPGS_PER_HBA) { 12566708bb27SAndy Grover pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" 12573703b2c5SNicholas Bellinger " %u\n", tpgt, TL_TPGS_PER_HBA); 12583703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12593703b2c5SNicholas Bellinger } 12603703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; 12613703b2c5SNicholas Bellinger tl_tpg->tl_hba = tl_hba; 12623703b2c5SNicholas Bellinger tl_tpg->tl_tpgt = tpgt; 12633703b2c5SNicholas Bellinger /* 12643703b2c5SNicholas Bellinger * Register the tl_tpg as a emulated SAS TCM Target Endpoint 12653703b2c5SNicholas Bellinger */ 12663703b2c5SNicholas Bellinger ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, 12675951146dSAndy Grover wwn, &tl_tpg->tl_se_tpg, tl_tpg, 12683703b2c5SNicholas Bellinger TRANSPORT_TPG_TYPE_NORMAL); 12693703b2c5SNicholas Bellinger if (ret < 0) 12703703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 12713703b2c5SNicholas Bellinger 12726708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" 12733703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12743703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12753703b2c5SNicholas Bellinger 12763703b2c5SNicholas Bellinger return &tl_tpg->tl_se_tpg; 12773703b2c5SNicholas Bellinger } 12783703b2c5SNicholas Bellinger 1279f0a6c693SRashika Kheria static void tcm_loop_drop_naa_tpg( 12803703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 12813703b2c5SNicholas Bellinger { 12823703b2c5SNicholas Bellinger struct se_wwn *wwn = se_tpg->se_tpg_wwn; 12833703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 12843703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 12853703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 12863703b2c5SNicholas Bellinger unsigned short tpgt; 12873703b2c5SNicholas Bellinger 12883703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 12893703b2c5SNicholas Bellinger tpgt = tl_tpg->tl_tpgt; 12903703b2c5SNicholas Bellinger /* 12913703b2c5SNicholas Bellinger * Release the I_T Nexus for the Virtual SAS link if present 12923703b2c5SNicholas Bellinger */ 12933703b2c5SNicholas Bellinger tcm_loop_drop_nexus(tl_tpg); 12943703b2c5SNicholas Bellinger /* 12953703b2c5SNicholas Bellinger * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint 12963703b2c5SNicholas Bellinger */ 12973703b2c5SNicholas Bellinger core_tpg_deregister(se_tpg); 12983703b2c5SNicholas Bellinger 12990a020436SNicholas Bellinger tl_tpg->tl_hba = NULL; 13000a020436SNicholas Bellinger tl_tpg->tl_tpgt = 0; 13010a020436SNicholas Bellinger 13026708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" 13033703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 13043703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 13053703b2c5SNicholas Bellinger } 13063703b2c5SNicholas Bellinger 13073703b2c5SNicholas Bellinger /* End items for tcm_loop_naa_cit */ 13083703b2c5SNicholas Bellinger 13093703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 13103703b2c5SNicholas Bellinger 1311f0a6c693SRashika Kheria static struct se_wwn *tcm_loop_make_scsi_hba( 13123703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 13133703b2c5SNicholas Bellinger struct config_group *group, 13143703b2c5SNicholas Bellinger const char *name) 13153703b2c5SNicholas Bellinger { 13163703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 13173703b2c5SNicholas Bellinger struct Scsi_Host *sh; 13183703b2c5SNicholas Bellinger char *ptr; 13193703b2c5SNicholas Bellinger int ret, off = 0; 13203703b2c5SNicholas Bellinger 13213703b2c5SNicholas Bellinger tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); 13223703b2c5SNicholas Bellinger if (!tl_hba) { 13236708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_hba\n"); 13243703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 13253703b2c5SNicholas Bellinger } 13263703b2c5SNicholas Bellinger /* 13273703b2c5SNicholas Bellinger * Determine the emulated Protocol Identifier and Target Port Name 13283703b2c5SNicholas Bellinger * based on the incoming configfs directory name. 13293703b2c5SNicholas Bellinger */ 13303703b2c5SNicholas Bellinger ptr = strstr(name, "naa."); 13313703b2c5SNicholas Bellinger if (ptr) { 13323703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; 13333703b2c5SNicholas Bellinger goto check_len; 13343703b2c5SNicholas Bellinger } 13353703b2c5SNicholas Bellinger ptr = strstr(name, "fc."); 13363703b2c5SNicholas Bellinger if (ptr) { 13373703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; 13383703b2c5SNicholas Bellinger off = 3; /* Skip over "fc." */ 13393703b2c5SNicholas Bellinger goto check_len; 13403703b2c5SNicholas Bellinger } 13413703b2c5SNicholas Bellinger ptr = strstr(name, "iqn."); 1342a57b5d36SJesper Juhl if (!ptr) { 13436708bb27SAndy Grover pr_err("Unable to locate prefix for emulated Target " 1344a57b5d36SJesper Juhl "Port: %s\n", name); 1345a57b5d36SJesper Juhl ret = -EINVAL; 1346a57b5d36SJesper Juhl goto out; 13473703b2c5SNicholas Bellinger } 1348a57b5d36SJesper Juhl tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; 13493703b2c5SNicholas Bellinger 13503703b2c5SNicholas Bellinger check_len: 135160d645a4SDan Carpenter if (strlen(name) >= TL_WWN_ADDR_LEN) { 13526708bb27SAndy Grover pr_err("Emulated NAA %s Address: %s, exceeds" 13533703b2c5SNicholas Bellinger " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), 13543703b2c5SNicholas Bellinger TL_WWN_ADDR_LEN); 1355a57b5d36SJesper Juhl ret = -EINVAL; 1356a57b5d36SJesper Juhl goto out; 13573703b2c5SNicholas Bellinger } 13583703b2c5SNicholas Bellinger snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); 13593703b2c5SNicholas Bellinger 13603703b2c5SNicholas Bellinger /* 13613703b2c5SNicholas Bellinger * Call device_register(tl_hba->dev) to register the emulated 13623703b2c5SNicholas Bellinger * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after 13633703b2c5SNicholas Bellinger * device_register() callbacks in tcm_loop_driver_probe() 13643703b2c5SNicholas Bellinger */ 13653703b2c5SNicholas Bellinger ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); 13663703b2c5SNicholas Bellinger if (ret) 13673703b2c5SNicholas Bellinger goto out; 13683703b2c5SNicholas Bellinger 13693703b2c5SNicholas Bellinger sh = tl_hba->sh; 13703703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt++; 13716708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" 13723703b2c5SNicholas Bellinger " %s Address: %s at Linux/SCSI Host ID: %d\n", 13733703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); 13743703b2c5SNicholas Bellinger 13753703b2c5SNicholas Bellinger return &tl_hba->tl_hba_wwn; 13763703b2c5SNicholas Bellinger out: 13773703b2c5SNicholas Bellinger kfree(tl_hba); 13783703b2c5SNicholas Bellinger return ERR_PTR(ret); 13793703b2c5SNicholas Bellinger } 13803703b2c5SNicholas Bellinger 1381f0a6c693SRashika Kheria static void tcm_loop_drop_scsi_hba( 13823703b2c5SNicholas Bellinger struct se_wwn *wwn) 13833703b2c5SNicholas Bellinger { 13843703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 13853703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 13866297b07cSNicholas Bellinger 13876297b07cSNicholas Bellinger pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target" 13886297b07cSNicholas Bellinger " SAS Address: %s at Linux/SCSI Host ID: %d\n", 13896297b07cSNicholas Bellinger tl_hba->tl_wwn_address, tl_hba->sh->host_no); 13903703b2c5SNicholas Bellinger /* 13913703b2c5SNicholas Bellinger * Call device_unregister() on the original tl_hba->dev. 13923703b2c5SNicholas Bellinger * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will 13933703b2c5SNicholas Bellinger * release *tl_hba; 13943703b2c5SNicholas Bellinger */ 13953703b2c5SNicholas Bellinger device_unregister(&tl_hba->dev); 13963703b2c5SNicholas Bellinger } 13973703b2c5SNicholas Bellinger 13983703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 13993703b2c5SNicholas Bellinger static ssize_t tcm_loop_wwn_show_attr_version( 14003703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 14013703b2c5SNicholas Bellinger char *page) 14023703b2c5SNicholas Bellinger { 14033703b2c5SNicholas Bellinger return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); 14043703b2c5SNicholas Bellinger } 14053703b2c5SNicholas Bellinger 14063703b2c5SNicholas Bellinger TF_WWN_ATTR_RO(tcm_loop, version); 14073703b2c5SNicholas Bellinger 14083703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_wwn_attrs[] = { 14093703b2c5SNicholas Bellinger &tcm_loop_wwn_version.attr, 14103703b2c5SNicholas Bellinger NULL, 14113703b2c5SNicholas Bellinger }; 14123703b2c5SNicholas Bellinger 14133703b2c5SNicholas Bellinger /* End items for tcm_loop_cit */ 14143703b2c5SNicholas Bellinger 14153703b2c5SNicholas Bellinger static int tcm_loop_register_configfs(void) 14163703b2c5SNicholas Bellinger { 14173703b2c5SNicholas Bellinger struct target_fabric_configfs *fabric; 14183703b2c5SNicholas Bellinger int ret; 14193703b2c5SNicholas Bellinger /* 14203703b2c5SNicholas Bellinger * Set the TCM Loop HBA counter to zero 14213703b2c5SNicholas Bellinger */ 14223703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt = 0; 14233703b2c5SNicholas Bellinger /* 14243703b2c5SNicholas Bellinger * Register the top level struct config_item_type with TCM core 14253703b2c5SNicholas Bellinger */ 14263703b2c5SNicholas Bellinger fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); 1427e3d6f909SAndy Grover if (IS_ERR(fabric)) { 14286708bb27SAndy Grover pr_err("tcm_loop_register_configfs() failed!\n"); 1429e3d6f909SAndy Grover return PTR_ERR(fabric); 14303703b2c5SNicholas Bellinger } 14313703b2c5SNicholas Bellinger /* 14323703b2c5SNicholas Bellinger * Setup the fabric API of function pointers used by target_core_mod 14333703b2c5SNicholas Bellinger */ 14343703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; 14353703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; 14363703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; 14373703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; 14383703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; 14393703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; 14403703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id_len = 14413703b2c5SNicholas Bellinger &tcm_loop_get_pr_transport_id_len; 14423703b2c5SNicholas Bellinger fabric->tf_ops.tpg_parse_pr_out_transport_id = 14433703b2c5SNicholas Bellinger &tcm_loop_parse_pr_out_transport_id; 14443703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; 14453703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_cache = 14463703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_cache; 14473703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_write_protect = 14483703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_write_protect; 14493703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_prod_mode_write_protect = 14503703b2c5SNicholas Bellinger &tcm_loop_check_prod_mode_write_protect; 14513703b2c5SNicholas Bellinger /* 14523703b2c5SNicholas Bellinger * The TCM loopback fabric module runs in demo-mode to a local 14533703b2c5SNicholas Bellinger * virtual SCSI device, so fabric dependent initator ACLs are 14543703b2c5SNicholas Bellinger * not required. 14553703b2c5SNicholas Bellinger */ 14563703b2c5SNicholas Bellinger fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; 14573703b2c5SNicholas Bellinger fabric->tf_ops.tpg_release_fabric_acl = 14583703b2c5SNicholas Bellinger &tcm_loop_tpg_release_fabric_acl; 14593703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; 14603703b2c5SNicholas Bellinger /* 14613703b2c5SNicholas Bellinger * Used for setting up remaining TCM resources in process context 14623703b2c5SNicholas Bellinger */ 14633703b2c5SNicholas Bellinger fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; 146435462975SChristoph Hellwig fabric->tf_ops.release_cmd = &tcm_loop_release_cmd; 14653703b2c5SNicholas Bellinger fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; 14663703b2c5SNicholas Bellinger fabric->tf_ops.close_session = &tcm_loop_close_session; 14673703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; 14683703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_initiator_sid = NULL; 14693703b2c5SNicholas Bellinger fabric->tf_ops.write_pending = &tcm_loop_write_pending; 14703703b2c5SNicholas Bellinger fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; 14713703b2c5SNicholas Bellinger /* 14723703b2c5SNicholas Bellinger * Not used for TCM loopback 14733703b2c5SNicholas Bellinger */ 14743703b2c5SNicholas Bellinger fabric->tf_ops.set_default_node_attributes = 14753703b2c5SNicholas Bellinger &tcm_loop_set_default_node_attributes; 14763703b2c5SNicholas Bellinger fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; 14773703b2c5SNicholas Bellinger fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; 14783703b2c5SNicholas Bellinger fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; 14793703b2c5SNicholas Bellinger fabric->tf_ops.queue_status = &tcm_loop_queue_status; 14803703b2c5SNicholas Bellinger fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; 1481131e6abcSNicholas Bellinger fabric->tf_ops.aborted_task = &tcm_loop_aborted_task; 14823703b2c5SNicholas Bellinger 14833703b2c5SNicholas Bellinger /* 14843703b2c5SNicholas Bellinger * Setup function pointers for generic logic in target_core_fabric_configfs.c 14853703b2c5SNicholas Bellinger */ 14863703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; 14873703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; 14883703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; 14893703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; 14903703b2c5SNicholas Bellinger /* 14913703b2c5SNicholas Bellinger * fabric_post_link() and fabric_pre_unlink() are used for 14923703b2c5SNicholas Bellinger * registration and release of TCM Loop Virtual SCSI LUNs. 14933703b2c5SNicholas Bellinger */ 14943703b2c5SNicholas Bellinger fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; 14953703b2c5SNicholas Bellinger fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; 14963703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_np = NULL; 14973703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_np = NULL; 14983703b2c5SNicholas Bellinger /* 14993703b2c5SNicholas Bellinger * Setup default attribute lists for various fabric->tf_cit_tmpl 15003703b2c5SNicholas Bellinger */ 1501d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; 1502d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; 1503d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL; 1504d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL; 1505d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL; 15063703b2c5SNicholas Bellinger /* 15073703b2c5SNicholas Bellinger * Once fabric->tf_ops has been setup, now register the fabric for 15083703b2c5SNicholas Bellinger * use within TCM 15093703b2c5SNicholas Bellinger */ 15103703b2c5SNicholas Bellinger ret = target_fabric_configfs_register(fabric); 15113703b2c5SNicholas Bellinger if (ret < 0) { 15126708bb27SAndy Grover pr_err("target_fabric_configfs_register() for" 15133703b2c5SNicholas Bellinger " TCM_Loop failed!\n"); 15143703b2c5SNicholas Bellinger target_fabric_configfs_free(fabric); 15153703b2c5SNicholas Bellinger return -1; 15163703b2c5SNicholas Bellinger } 15173703b2c5SNicholas Bellinger /* 15183703b2c5SNicholas Bellinger * Setup our local pointer to *fabric. 15193703b2c5SNicholas Bellinger */ 15203703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = fabric; 15216708bb27SAndy Grover pr_debug("TCM_LOOP[0] - Set fabric ->" 15223703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15233703b2c5SNicholas Bellinger return 0; 15243703b2c5SNicholas Bellinger } 15253703b2c5SNicholas Bellinger 15263703b2c5SNicholas Bellinger static void tcm_loop_deregister_configfs(void) 15273703b2c5SNicholas Bellinger { 15283703b2c5SNicholas Bellinger if (!tcm_loop_fabric_configfs) 15293703b2c5SNicholas Bellinger return; 15303703b2c5SNicholas Bellinger 15313703b2c5SNicholas Bellinger target_fabric_configfs_deregister(tcm_loop_fabric_configfs); 15323703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = NULL; 15336708bb27SAndy Grover pr_debug("TCM_LOOP[0] - Cleared" 15343703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15353703b2c5SNicholas Bellinger } 15363703b2c5SNicholas Bellinger 15373703b2c5SNicholas Bellinger static int __init tcm_loop_fabric_init(void) 15383703b2c5SNicholas Bellinger { 1539afe2cb7fSChristoph Hellwig int ret = -ENOMEM; 1540afe2cb7fSChristoph Hellwig 1541afe2cb7fSChristoph Hellwig tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0); 1542afe2cb7fSChristoph Hellwig if (!tcm_loop_workqueue) 1543afe2cb7fSChristoph Hellwig goto out; 15443703b2c5SNicholas Bellinger 15453703b2c5SNicholas Bellinger tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", 15463703b2c5SNicholas Bellinger sizeof(struct tcm_loop_cmd), 15473703b2c5SNicholas Bellinger __alignof__(struct tcm_loop_cmd), 15483703b2c5SNicholas Bellinger 0, NULL); 15493703b2c5SNicholas Bellinger if (!tcm_loop_cmd_cache) { 15506708bb27SAndy Grover pr_debug("kmem_cache_create() for" 15513703b2c5SNicholas Bellinger " tcm_loop_cmd_cache failed\n"); 1552afe2cb7fSChristoph Hellwig goto out_destroy_workqueue; 15533703b2c5SNicholas Bellinger } 15543703b2c5SNicholas Bellinger 15553703b2c5SNicholas Bellinger ret = tcm_loop_alloc_core_bus(); 15563703b2c5SNicholas Bellinger if (ret) 1557afe2cb7fSChristoph Hellwig goto out_destroy_cache; 15583703b2c5SNicholas Bellinger 15593703b2c5SNicholas Bellinger ret = tcm_loop_register_configfs(); 1560afe2cb7fSChristoph Hellwig if (ret) 1561afe2cb7fSChristoph Hellwig goto out_release_core_bus; 15623703b2c5SNicholas Bellinger 15633703b2c5SNicholas Bellinger return 0; 1564afe2cb7fSChristoph Hellwig 1565afe2cb7fSChristoph Hellwig out_release_core_bus: 1566afe2cb7fSChristoph Hellwig tcm_loop_release_core_bus(); 1567afe2cb7fSChristoph Hellwig out_destroy_cache: 1568afe2cb7fSChristoph Hellwig kmem_cache_destroy(tcm_loop_cmd_cache); 1569afe2cb7fSChristoph Hellwig out_destroy_workqueue: 1570afe2cb7fSChristoph Hellwig destroy_workqueue(tcm_loop_workqueue); 1571afe2cb7fSChristoph Hellwig out: 1572afe2cb7fSChristoph Hellwig return ret; 15733703b2c5SNicholas Bellinger } 15743703b2c5SNicholas Bellinger 15753703b2c5SNicholas Bellinger static void __exit tcm_loop_fabric_exit(void) 15763703b2c5SNicholas Bellinger { 15773703b2c5SNicholas Bellinger tcm_loop_deregister_configfs(); 15783703b2c5SNicholas Bellinger tcm_loop_release_core_bus(); 15793703b2c5SNicholas Bellinger kmem_cache_destroy(tcm_loop_cmd_cache); 1580afe2cb7fSChristoph Hellwig destroy_workqueue(tcm_loop_workqueue); 15813703b2c5SNicholas Bellinger } 15823703b2c5SNicholas Bellinger 15833703b2c5SNicholas Bellinger MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); 15843703b2c5SNicholas Bellinger MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); 15853703b2c5SNicholas Bellinger MODULE_LICENSE("GPL"); 15863703b2c5SNicholas Bellinger module_init(tcm_loop_fabric_init); 15873703b2c5SNicholas Bellinger module_exit(tcm_loop_fabric_exit); 1588