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 138969871cdSHannes Reinecke static int tcm_loop_change_queue_type(struct scsi_device *sdev, int tag) 139969871cdSHannes Reinecke { 140969871cdSHannes Reinecke if (sdev->tagged_supported) { 141969871cdSHannes Reinecke scsi_set_tag_type(sdev, tag); 142969871cdSHannes Reinecke 143969871cdSHannes Reinecke if (tag) 144969871cdSHannes Reinecke scsi_activate_tcq(sdev, sdev->queue_depth); 145969871cdSHannes Reinecke else 146969871cdSHannes Reinecke scsi_deactivate_tcq(sdev, sdev->queue_depth); 147969871cdSHannes Reinecke } else 148969871cdSHannes Reinecke tag = 0; 149969871cdSHannes Reinecke 150969871cdSHannes Reinecke return tag; 151969871cdSHannes Reinecke } 152969871cdSHannes Reinecke 1533703b2c5SNicholas Bellinger /* 154f872c9f4SChristoph Hellwig * Locate the SAM Task Attr from struct scsi_cmnd * 155f872c9f4SChristoph Hellwig */ 1566375f890SHannes Reinecke static int tcm_loop_sam_attr(struct scsi_cmnd *sc, int tag) 157f872c9f4SChristoph Hellwig { 1586375f890SHannes Reinecke if (sc->device->tagged_supported && 1596375f890SHannes Reinecke sc->device->ordered_tags && tag >= 0) 160f872c9f4SChristoph Hellwig return MSG_ORDERED_TAG; 161f872c9f4SChristoph Hellwig 162f872c9f4SChristoph Hellwig return MSG_SIMPLE_TAG; 163f872c9f4SChristoph Hellwig } 164f872c9f4SChristoph Hellwig 165afe2cb7fSChristoph Hellwig static void tcm_loop_submission_work(struct work_struct *work) 1663703b2c5SNicholas Bellinger { 167afe2cb7fSChristoph Hellwig struct tcm_loop_cmd *tl_cmd = 168afe2cb7fSChristoph Hellwig container_of(work, struct tcm_loop_cmd, work); 169afe2cb7fSChristoph Hellwig struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd; 170afe2cb7fSChristoph Hellwig struct scsi_cmnd *sc = tl_cmd->sc; 171afe2cb7fSChristoph Hellwig struct tcm_loop_nexus *tl_nexus; 1723703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 1733703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 17416786454SChristoph Hellwig struct scatterlist *sgl_bidi = NULL; 175e2a4f55cSSagi Grimberg u32 sgl_bidi_count = 0, transfer_length; 1768f9f44f8SNicholas Bellinger int rc; 177f872c9f4SChristoph Hellwig 1783703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 1793703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 180afe2cb7fSChristoph Hellwig 1810a020436SNicholas Bellinger /* 1820a020436SNicholas Bellinger * Ensure that this tl_tpg reference from the incoming sc->device->id 1830a020436SNicholas Bellinger * has already been configured via tcm_loop_make_naa_tpg(). 1840a020436SNicholas Bellinger */ 1850a020436SNicholas Bellinger if (!tl_tpg->tl_hba) { 1860a020436SNicholas Bellinger set_host_byte(sc, DID_NO_CONNECT); 187f872c9f4SChristoph Hellwig goto out_done; 1880a020436SNicholas Bellinger } 189fb2b2844SHannes Reinecke if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) { 190fb2b2844SHannes Reinecke set_host_byte(sc, DID_TRANSPORT_DISRUPTED); 191fb2b2844SHannes Reinecke goto out_done; 192fb2b2844SHannes Reinecke } 193506787a2SHannes Reinecke tl_nexus = tl_tpg->tl_nexus; 194f872c9f4SChristoph Hellwig if (!tl_nexus) { 195f872c9f4SChristoph Hellwig scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" 196f872c9f4SChristoph Hellwig " does not exist\n"); 197f872c9f4SChristoph Hellwig set_host_byte(sc, DID_ERROR); 198f872c9f4SChristoph Hellwig goto out_done; 1993703b2c5SNicholas Bellinger } 20016786454SChristoph Hellwig if (scsi_bidi_cmnd(sc)) { 20116786454SChristoph Hellwig struct scsi_data_buffer *sdb = scsi_in(sc); 20216786454SChristoph Hellwig 20316786454SChristoph Hellwig sgl_bidi = sdb->table.sgl; 20416786454SChristoph Hellwig sgl_bidi_count = sdb->table.nents; 205f872c9f4SChristoph Hellwig se_cmd->se_cmd_flags |= SCF_BIDI; 206f872c9f4SChristoph Hellwig 20716786454SChristoph Hellwig } 208b5b8e298SSagi Grimberg 209e2a4f55cSSagi Grimberg transfer_length = scsi_transfer_length(sc); 210e2a4f55cSSagi Grimberg if (!scsi_prot_sg_count(sc) && 211e2a4f55cSSagi Grimberg scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) { 212b5b8e298SSagi Grimberg se_cmd->prot_pto = true; 213e2a4f55cSSagi Grimberg /* 214e2a4f55cSSagi Grimberg * loopback transport doesn't support 215e2a4f55cSSagi Grimberg * WRITE_GENERATE, READ_STRIP protection 216e2a4f55cSSagi Grimberg * information operations, go ahead unprotected. 217e2a4f55cSSagi Grimberg */ 218e2a4f55cSSagi Grimberg transfer_length = scsi_bufflen(sc); 219e2a4f55cSSagi Grimberg } 220b5b8e298SSagi Grimberg 2218f9f44f8SNicholas Bellinger rc = target_submit_cmd_map_sgls(se_cmd, tl_nexus->se_sess, sc->cmnd, 2228f9f44f8SNicholas Bellinger &tl_cmd->tl_sense_buf[0], tl_cmd->sc->device->lun, 2236375f890SHannes Reinecke transfer_length, tcm_loop_sam_attr(sc, tl_cmd->sc_cmd_tag), 2248f9f44f8SNicholas Bellinger sc->sc_data_direction, 0, 2258f9f44f8SNicholas Bellinger scsi_sglist(sc), scsi_sg_count(sc), 22659dedde2SNicholas Bellinger sgl_bidi, sgl_bidi_count, 22759dedde2SNicholas Bellinger scsi_prot_sglist(sc), scsi_prot_sg_count(sc)); 2288f9f44f8SNicholas Bellinger if (rc < 0) { 229f872c9f4SChristoph Hellwig set_host_byte(sc, DID_NO_CONNECT); 230f872c9f4SChristoph Hellwig goto out_done; 231f872c9f4SChristoph Hellwig } 232afe2cb7fSChristoph Hellwig return; 233f872c9f4SChristoph Hellwig 234f872c9f4SChristoph Hellwig out_done: 235b43f1886SNicholas Bellinger kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 236f872c9f4SChristoph Hellwig sc->scsi_done(sc); 237afe2cb7fSChristoph Hellwig return; 238afe2cb7fSChristoph Hellwig } 239afe2cb7fSChristoph Hellwig 240afe2cb7fSChristoph Hellwig /* 241afe2cb7fSChristoph Hellwig * ->queuecommand can be and usually is called from interrupt context, so 242afe2cb7fSChristoph Hellwig * defer the actual submission to a workqueue. 243afe2cb7fSChristoph Hellwig */ 244afe2cb7fSChristoph Hellwig static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) 245afe2cb7fSChristoph Hellwig { 246afe2cb7fSChristoph Hellwig struct tcm_loop_cmd *tl_cmd; 247afe2cb7fSChristoph Hellwig 2489cb78c16SHannes Reinecke pr_debug("tcm_loop_queuecommand() %d:%d:%d:%llu got CDB: 0x%02x" 249afe2cb7fSChristoph Hellwig " scsi_buf_len: %u\n", sc->device->host->host_no, 250afe2cb7fSChristoph Hellwig sc->device->id, sc->device->channel, sc->device->lun, 251afe2cb7fSChristoph Hellwig sc->cmnd[0], scsi_bufflen(sc)); 252afe2cb7fSChristoph Hellwig 253afe2cb7fSChristoph Hellwig tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); 254afe2cb7fSChristoph Hellwig if (!tl_cmd) { 255afe2cb7fSChristoph Hellwig pr_err("Unable to allocate struct tcm_loop_cmd\n"); 256afe2cb7fSChristoph Hellwig set_host_byte(sc, DID_ERROR); 257afe2cb7fSChristoph Hellwig sc->scsi_done(sc); 258afe2cb7fSChristoph Hellwig return 0; 259afe2cb7fSChristoph Hellwig } 260afe2cb7fSChristoph Hellwig 261afe2cb7fSChristoph Hellwig tl_cmd->sc = sc; 2626375f890SHannes Reinecke tl_cmd->sc_cmd_tag = sc->request->tag; 263afe2cb7fSChristoph Hellwig INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); 264afe2cb7fSChristoph Hellwig queue_work(tcm_loop_workqueue, &tl_cmd->work); 265f872c9f4SChristoph Hellwig return 0; 2663703b2c5SNicholas Bellinger } 2673703b2c5SNicholas Bellinger 2683703b2c5SNicholas Bellinger /* 2693703b2c5SNicholas Bellinger * Called from SCSI EH process context to issue a LUN_RESET TMR 2703703b2c5SNicholas Bellinger * to struct scsi_device 2713703b2c5SNicholas Bellinger */ 272a314d700SHannes Reinecke static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, 273969871cdSHannes Reinecke int lun, int task, enum tcm_tmreq_table tmr) 2743703b2c5SNicholas Bellinger { 2753703b2c5SNicholas Bellinger struct se_cmd *se_cmd = NULL; 2763703b2c5SNicholas Bellinger struct se_session *se_sess; 277a314d700SHannes Reinecke struct se_portal_group *se_tpg; 278506787a2SHannes Reinecke struct tcm_loop_nexus *tl_nexus; 2793703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = NULL; 280a314d700SHannes Reinecke struct tcm_loop_tmr *tl_tmr = NULL; 281a314d700SHannes Reinecke int ret = TMR_FUNCTION_FAILED, rc; 282a314d700SHannes Reinecke 283506787a2SHannes Reinecke /* 284506787a2SHannes Reinecke * Locate the tl_nexus and se_sess pointers 285506787a2SHannes Reinecke */ 286506787a2SHannes Reinecke tl_nexus = tl_tpg->tl_nexus; 287506787a2SHannes Reinecke if (!tl_nexus) { 288506787a2SHannes Reinecke pr_err("Unable to perform device reset without" 289506787a2SHannes Reinecke " active I_T Nexus\n"); 290506787a2SHannes Reinecke return ret; 291506787a2SHannes Reinecke } 292506787a2SHannes Reinecke 293a314d700SHannes Reinecke tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); 294a314d700SHannes Reinecke if (!tl_cmd) { 295a314d700SHannes Reinecke pr_err("Unable to allocate memory for tl_cmd\n"); 296a314d700SHannes Reinecke return ret; 297a314d700SHannes Reinecke } 298a314d700SHannes Reinecke 299a314d700SHannes Reinecke tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); 300a314d700SHannes Reinecke if (!tl_tmr) { 301a314d700SHannes Reinecke pr_err("Unable to allocate memory for tl_tmr\n"); 302a314d700SHannes Reinecke goto release; 303a314d700SHannes Reinecke } 304a314d700SHannes Reinecke init_waitqueue_head(&tl_tmr->tl_tmr_wait); 305a314d700SHannes Reinecke 306a314d700SHannes Reinecke se_cmd = &tl_cmd->tl_se_cmd; 307a314d700SHannes Reinecke se_tpg = &tl_tpg->tl_se_tpg; 308506787a2SHannes Reinecke se_sess = tl_tpg->tl_nexus->se_sess; 309a314d700SHannes Reinecke /* 310a314d700SHannes Reinecke * Initialize struct se_cmd descriptor from target_core_mod infrastructure 311a314d700SHannes Reinecke */ 312a314d700SHannes Reinecke transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, 313a314d700SHannes Reinecke DMA_NONE, MSG_SIMPLE_TAG, 314a314d700SHannes Reinecke &tl_cmd->tl_sense_buf[0]); 315a314d700SHannes Reinecke 316a314d700SHannes Reinecke rc = core_tmr_alloc_req(se_cmd, tl_tmr, tmr, GFP_KERNEL); 317a314d700SHannes Reinecke if (rc < 0) 318a314d700SHannes Reinecke goto release; 319a314d700SHannes Reinecke 320969871cdSHannes Reinecke if (tmr == TMR_ABORT_TASK) 321969871cdSHannes Reinecke se_cmd->se_tmr_req->ref_task_tag = task; 322969871cdSHannes Reinecke 323a314d700SHannes Reinecke /* 324a314d700SHannes Reinecke * Locate the underlying TCM struct se_lun 325a314d700SHannes Reinecke */ 326a314d700SHannes Reinecke if (transport_lookup_tmr_lun(se_cmd, lun) < 0) { 327a314d700SHannes Reinecke ret = TMR_LUN_DOES_NOT_EXIST; 328a314d700SHannes Reinecke goto release; 329a314d700SHannes Reinecke } 330a314d700SHannes Reinecke /* 331a314d700SHannes Reinecke * Queue the TMR to TCM Core and sleep waiting for 332a314d700SHannes Reinecke * tcm_loop_queue_tm_rsp() to wake us up. 333a314d700SHannes Reinecke */ 334a314d700SHannes Reinecke transport_generic_handle_tmr(se_cmd); 335a314d700SHannes Reinecke wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); 336a314d700SHannes Reinecke /* 337a314d700SHannes Reinecke * The TMR LUN_RESET has completed, check the response status and 338a314d700SHannes Reinecke * then release allocations. 339a314d700SHannes Reinecke */ 340a314d700SHannes Reinecke ret = se_cmd->se_tmr_req->response; 341a314d700SHannes Reinecke release: 342a314d700SHannes Reinecke if (se_cmd) 343a314d700SHannes Reinecke transport_generic_free_cmd(se_cmd, 1); 344a314d700SHannes Reinecke else 345a314d700SHannes Reinecke kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); 346a314d700SHannes Reinecke kfree(tl_tmr); 347a314d700SHannes Reinecke return ret; 348a314d700SHannes Reinecke } 349a314d700SHannes Reinecke 350969871cdSHannes Reinecke static int tcm_loop_abort_task(struct scsi_cmnd *sc) 351969871cdSHannes Reinecke { 352969871cdSHannes Reinecke struct tcm_loop_hba *tl_hba; 353969871cdSHannes Reinecke struct tcm_loop_tpg *tl_tpg; 354969871cdSHannes Reinecke int ret = FAILED; 355969871cdSHannes Reinecke 356969871cdSHannes Reinecke /* 357969871cdSHannes Reinecke * Locate the tcm_loop_hba_t pointer 358969871cdSHannes Reinecke */ 359969871cdSHannes Reinecke tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 360969871cdSHannes Reinecke tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 361506787a2SHannes Reinecke ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun, 3626375f890SHannes Reinecke sc->request->tag, TMR_ABORT_TASK); 363969871cdSHannes Reinecke return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; 364969871cdSHannes Reinecke } 365969871cdSHannes Reinecke 366a314d700SHannes Reinecke /* 367a314d700SHannes Reinecke * Called from SCSI EH process context to issue a LUN_RESET TMR 368a314d700SHannes Reinecke * to struct scsi_device 369a314d700SHannes Reinecke */ 370a314d700SHannes Reinecke static int tcm_loop_device_reset(struct scsi_cmnd *sc) 371a314d700SHannes Reinecke { 3723703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 3733703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 374a314d700SHannes Reinecke int ret = FAILED; 375a314d700SHannes Reinecke 3763703b2c5SNicholas Bellinger /* 3773703b2c5SNicholas Bellinger * Locate the tcm_loop_hba_t pointer 3783703b2c5SNicholas Bellinger */ 3793703b2c5SNicholas Bellinger tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3803703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 381506787a2SHannes Reinecke 382506787a2SHannes Reinecke ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun, 383969871cdSHannes Reinecke 0, TMR_LUN_RESET); 384a314d700SHannes Reinecke return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; 3853703b2c5SNicholas Bellinger } 3863703b2c5SNicholas Bellinger 3878f4a1fb0SHannes Reinecke static int tcm_loop_target_reset(struct scsi_cmnd *sc) 3888f4a1fb0SHannes Reinecke { 3898f4a1fb0SHannes Reinecke struct tcm_loop_hba *tl_hba; 3908f4a1fb0SHannes Reinecke struct tcm_loop_tpg *tl_tpg; 3918f4a1fb0SHannes Reinecke 3928f4a1fb0SHannes Reinecke /* 3938f4a1fb0SHannes Reinecke * Locate the tcm_loop_hba_t pointer 3948f4a1fb0SHannes Reinecke */ 3958f4a1fb0SHannes Reinecke tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); 3968f4a1fb0SHannes Reinecke if (!tl_hba) { 3978f4a1fb0SHannes Reinecke pr_err("Unable to perform device reset without" 3988f4a1fb0SHannes Reinecke " active I_T Nexus\n"); 3998f4a1fb0SHannes Reinecke return FAILED; 4008f4a1fb0SHannes Reinecke } 4018f4a1fb0SHannes Reinecke /* 4028f4a1fb0SHannes Reinecke * Locate the tl_tpg pointer from TargetID in sc->device->id 4038f4a1fb0SHannes Reinecke */ 4048f4a1fb0SHannes Reinecke tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; 4058f4a1fb0SHannes Reinecke if (tl_tpg) { 4068f4a1fb0SHannes Reinecke tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; 4078f4a1fb0SHannes Reinecke return SUCCESS; 4088f4a1fb0SHannes Reinecke } 4098f4a1fb0SHannes Reinecke return FAILED; 4108f4a1fb0SHannes Reinecke } 4118f4a1fb0SHannes Reinecke 4123703b2c5SNicholas Bellinger static int tcm_loop_slave_alloc(struct scsi_device *sd) 4133703b2c5SNicholas Bellinger { 4143703b2c5SNicholas Bellinger set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); 4153703b2c5SNicholas Bellinger return 0; 4163703b2c5SNicholas Bellinger } 4173703b2c5SNicholas Bellinger 4183703b2c5SNicholas Bellinger static int tcm_loop_slave_configure(struct scsi_device *sd) 4193703b2c5SNicholas Bellinger { 420969871cdSHannes Reinecke if (sd->tagged_supported) { 421969871cdSHannes Reinecke scsi_activate_tcq(sd, sd->queue_depth); 422969871cdSHannes Reinecke scsi_adjust_queue_depth(sd, MSG_SIMPLE_TAG, 423969871cdSHannes Reinecke sd->host->cmd_per_lun); 424969871cdSHannes Reinecke } else { 425969871cdSHannes Reinecke scsi_adjust_queue_depth(sd, 0, 426969871cdSHannes Reinecke sd->host->cmd_per_lun); 427969871cdSHannes Reinecke } 428969871cdSHannes Reinecke 4293703b2c5SNicholas Bellinger return 0; 4303703b2c5SNicholas Bellinger } 4313703b2c5SNicholas Bellinger 4323703b2c5SNicholas Bellinger static struct scsi_host_template tcm_loop_driver_template = { 4338946b077SAl Viro .show_info = tcm_loop_show_info, 4343703b2c5SNicholas Bellinger .proc_name = "tcm_loopback", 4353703b2c5SNicholas Bellinger .name = "TCM_Loopback", 4363703b2c5SNicholas Bellinger .queuecommand = tcm_loop_queuecommand, 4373703b2c5SNicholas Bellinger .change_queue_depth = tcm_loop_change_queue_depth, 438969871cdSHannes Reinecke .change_queue_type = tcm_loop_change_queue_type, 439969871cdSHannes Reinecke .eh_abort_handler = tcm_loop_abort_task, 4403703b2c5SNicholas Bellinger .eh_device_reset_handler = tcm_loop_device_reset, 4418f4a1fb0SHannes Reinecke .eh_target_reset_handler = tcm_loop_target_reset, 4422e88efd3SChristoph Hellwig .can_queue = 1024, 4433703b2c5SNicholas Bellinger .this_id = -1, 4442e88efd3SChristoph Hellwig .sg_tablesize = 256, 4452e88efd3SChristoph Hellwig .cmd_per_lun = 1024, 4462e88efd3SChristoph Hellwig .max_sectors = 0xFFFF, 4473703b2c5SNicholas Bellinger .use_clustering = DISABLE_CLUSTERING, 4483703b2c5SNicholas Bellinger .slave_alloc = tcm_loop_slave_alloc, 4493703b2c5SNicholas Bellinger .slave_configure = tcm_loop_slave_configure, 4503703b2c5SNicholas Bellinger .module = THIS_MODULE, 4513703b2c5SNicholas Bellinger }; 4523703b2c5SNicholas Bellinger 4533703b2c5SNicholas Bellinger static int tcm_loop_driver_probe(struct device *dev) 4543703b2c5SNicholas Bellinger { 4553703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 4563703b2c5SNicholas Bellinger struct Scsi_Host *sh; 45759dedde2SNicholas Bellinger int error, host_prot; 4583703b2c5SNicholas Bellinger 4593703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 4603703b2c5SNicholas Bellinger 4613703b2c5SNicholas Bellinger sh = scsi_host_alloc(&tcm_loop_driver_template, 4623703b2c5SNicholas Bellinger sizeof(struct tcm_loop_hba)); 4633703b2c5SNicholas Bellinger if (!sh) { 4646708bb27SAndy Grover pr_err("Unable to allocate struct scsi_host\n"); 4653703b2c5SNicholas Bellinger return -ENODEV; 4663703b2c5SNicholas Bellinger } 4673703b2c5SNicholas Bellinger tl_hba->sh = sh; 4683703b2c5SNicholas Bellinger 4693703b2c5SNicholas Bellinger /* 4703703b2c5SNicholas Bellinger * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata 4713703b2c5SNicholas Bellinger */ 4723703b2c5SNicholas Bellinger *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; 4733703b2c5SNicholas Bellinger /* 4743703b2c5SNicholas Bellinger * Setup single ID, Channel and LUN for now.. 4753703b2c5SNicholas Bellinger */ 4763703b2c5SNicholas Bellinger sh->max_id = 2; 4773703b2c5SNicholas Bellinger sh->max_lun = 0; 4783703b2c5SNicholas Bellinger sh->max_channel = 0; 4793703b2c5SNicholas Bellinger sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; 4803703b2c5SNicholas Bellinger 48159dedde2SNicholas Bellinger host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION | 48259dedde2SNicholas Bellinger SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION | 48359dedde2SNicholas Bellinger SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION; 48459dedde2SNicholas Bellinger 48559dedde2SNicholas Bellinger scsi_host_set_prot(sh, host_prot); 48659dedde2SNicholas Bellinger scsi_host_set_guard(sh, SHOST_DIX_GUARD_CRC); 48759dedde2SNicholas Bellinger 4883703b2c5SNicholas Bellinger error = scsi_add_host(sh, &tl_hba->dev); 4893703b2c5SNicholas Bellinger if (error) { 4906708bb27SAndy Grover pr_err("%s: scsi_add_host failed\n", __func__); 4913703b2c5SNicholas Bellinger scsi_host_put(sh); 4923703b2c5SNicholas Bellinger return -ENODEV; 4933703b2c5SNicholas Bellinger } 4943703b2c5SNicholas Bellinger return 0; 4953703b2c5SNicholas Bellinger } 4963703b2c5SNicholas Bellinger 4973703b2c5SNicholas Bellinger static int tcm_loop_driver_remove(struct device *dev) 4983703b2c5SNicholas Bellinger { 4993703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 5003703b2c5SNicholas Bellinger struct Scsi_Host *sh; 5013703b2c5SNicholas Bellinger 5023703b2c5SNicholas Bellinger tl_hba = to_tcm_loop_hba(dev); 5033703b2c5SNicholas Bellinger sh = tl_hba->sh; 5043703b2c5SNicholas Bellinger 5053703b2c5SNicholas Bellinger scsi_remove_host(sh); 5063703b2c5SNicholas Bellinger scsi_host_put(sh); 5073703b2c5SNicholas Bellinger return 0; 5083703b2c5SNicholas Bellinger } 5093703b2c5SNicholas Bellinger 5103703b2c5SNicholas Bellinger static void tcm_loop_release_adapter(struct device *dev) 5113703b2c5SNicholas Bellinger { 5123703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); 5133703b2c5SNicholas Bellinger 5143703b2c5SNicholas Bellinger kfree(tl_hba); 5153703b2c5SNicholas Bellinger } 5163703b2c5SNicholas Bellinger 5173703b2c5SNicholas Bellinger /* 5183703b2c5SNicholas Bellinger * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c 5193703b2c5SNicholas Bellinger */ 5203703b2c5SNicholas Bellinger static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) 5213703b2c5SNicholas Bellinger { 5223703b2c5SNicholas Bellinger int ret; 5233703b2c5SNicholas Bellinger 5243703b2c5SNicholas Bellinger tl_hba->dev.bus = &tcm_loop_lld_bus; 5253703b2c5SNicholas Bellinger tl_hba->dev.parent = tcm_loop_primary; 5263703b2c5SNicholas Bellinger tl_hba->dev.release = &tcm_loop_release_adapter; 5273703b2c5SNicholas Bellinger dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); 5283703b2c5SNicholas Bellinger 5293703b2c5SNicholas Bellinger ret = device_register(&tl_hba->dev); 5303703b2c5SNicholas Bellinger if (ret) { 5316708bb27SAndy Grover pr_err("device_register() failed for" 5323703b2c5SNicholas Bellinger " tl_hba->dev: %d\n", ret); 5333703b2c5SNicholas Bellinger return -ENODEV; 5343703b2c5SNicholas Bellinger } 5353703b2c5SNicholas Bellinger 5363703b2c5SNicholas Bellinger return 0; 5373703b2c5SNicholas Bellinger } 5383703b2c5SNicholas Bellinger 5393703b2c5SNicholas Bellinger /* 5403703b2c5SNicholas Bellinger * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated 5413703b2c5SNicholas Bellinger * tcm_loop SCSI bus. 5423703b2c5SNicholas Bellinger */ 5433703b2c5SNicholas Bellinger static int tcm_loop_alloc_core_bus(void) 5443703b2c5SNicholas Bellinger { 5453703b2c5SNicholas Bellinger int ret; 5463703b2c5SNicholas Bellinger 5473703b2c5SNicholas Bellinger tcm_loop_primary = root_device_register("tcm_loop_0"); 5483703b2c5SNicholas Bellinger if (IS_ERR(tcm_loop_primary)) { 5496708bb27SAndy Grover pr_err("Unable to allocate tcm_loop_primary\n"); 5503703b2c5SNicholas Bellinger return PTR_ERR(tcm_loop_primary); 5513703b2c5SNicholas Bellinger } 5523703b2c5SNicholas Bellinger 5533703b2c5SNicholas Bellinger ret = bus_register(&tcm_loop_lld_bus); 5543703b2c5SNicholas Bellinger if (ret) { 5556708bb27SAndy Grover pr_err("bus_register() failed for tcm_loop_lld_bus\n"); 5563703b2c5SNicholas Bellinger goto dev_unreg; 5573703b2c5SNicholas Bellinger } 5583703b2c5SNicholas Bellinger 5593703b2c5SNicholas Bellinger ret = driver_register(&tcm_loop_driverfs); 5603703b2c5SNicholas Bellinger if (ret) { 5616708bb27SAndy Grover pr_err("driver_register() failed for" 5623703b2c5SNicholas Bellinger "tcm_loop_driverfs\n"); 5633703b2c5SNicholas Bellinger goto bus_unreg; 5643703b2c5SNicholas Bellinger } 5653703b2c5SNicholas Bellinger 5666708bb27SAndy Grover pr_debug("Initialized TCM Loop Core Bus\n"); 5673703b2c5SNicholas Bellinger return ret; 5683703b2c5SNicholas Bellinger 5693703b2c5SNicholas Bellinger bus_unreg: 5703703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5713703b2c5SNicholas Bellinger dev_unreg: 5723703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5733703b2c5SNicholas Bellinger return ret; 5743703b2c5SNicholas Bellinger } 5753703b2c5SNicholas Bellinger 5763703b2c5SNicholas Bellinger static void tcm_loop_release_core_bus(void) 5773703b2c5SNicholas Bellinger { 5783703b2c5SNicholas Bellinger driver_unregister(&tcm_loop_driverfs); 5793703b2c5SNicholas Bellinger bus_unregister(&tcm_loop_lld_bus); 5803703b2c5SNicholas Bellinger root_device_unregister(tcm_loop_primary); 5813703b2c5SNicholas Bellinger 5826708bb27SAndy Grover pr_debug("Releasing TCM Loop Core BUS\n"); 5833703b2c5SNicholas Bellinger } 5843703b2c5SNicholas Bellinger 5853703b2c5SNicholas Bellinger static char *tcm_loop_get_fabric_name(void) 5863703b2c5SNicholas Bellinger { 5873703b2c5SNicholas Bellinger return "loopback"; 5883703b2c5SNicholas Bellinger } 5893703b2c5SNicholas Bellinger 5903703b2c5SNicholas Bellinger static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) 5913703b2c5SNicholas Bellinger { 5928359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 5933703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 5943703b2c5SNicholas Bellinger /* 5953703b2c5SNicholas Bellinger * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() 5963703b2c5SNicholas Bellinger * time based on the protocol dependent prefix of the passed configfs group. 5973703b2c5SNicholas Bellinger * 5983703b2c5SNicholas Bellinger * Based upon tl_proto_id, TCM_Loop emulates the requested fabric 5993703b2c5SNicholas Bellinger * ProtocolID using target_core_fabric_lib.c symbols. 6003703b2c5SNicholas Bellinger */ 6013703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6023703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6033703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 6043703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6053703b2c5SNicholas Bellinger return fc_get_fabric_proto_ident(se_tpg); 6063703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6073703b2c5SNicholas Bellinger return iscsi_get_fabric_proto_ident(se_tpg); 6083703b2c5SNicholas Bellinger default: 6096708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6103703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6113703b2c5SNicholas Bellinger break; 6123703b2c5SNicholas Bellinger } 6133703b2c5SNicholas Bellinger 6143703b2c5SNicholas Bellinger return sas_get_fabric_proto_ident(se_tpg); 6153703b2c5SNicholas Bellinger } 6163703b2c5SNicholas Bellinger 6173703b2c5SNicholas Bellinger static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) 6183703b2c5SNicholas Bellinger { 6198359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6203703b2c5SNicholas Bellinger /* 6213703b2c5SNicholas Bellinger * Return the passed NAA identifier for the SAS Target Port 6223703b2c5SNicholas Bellinger */ 6233703b2c5SNicholas Bellinger return &tl_tpg->tl_hba->tl_wwn_address[0]; 6243703b2c5SNicholas Bellinger } 6253703b2c5SNicholas Bellinger 6263703b2c5SNicholas Bellinger static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) 6273703b2c5SNicholas Bellinger { 6288359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6293703b2c5SNicholas Bellinger /* 6303703b2c5SNicholas Bellinger * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 6313703b2c5SNicholas Bellinger * to represent the SCSI Target Port. 6323703b2c5SNicholas Bellinger */ 6333703b2c5SNicholas Bellinger return tl_tpg->tl_tpgt; 6343703b2c5SNicholas Bellinger } 6353703b2c5SNicholas Bellinger 6363703b2c5SNicholas Bellinger static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) 6373703b2c5SNicholas Bellinger { 6383703b2c5SNicholas Bellinger return 1; 6393703b2c5SNicholas Bellinger } 6403703b2c5SNicholas Bellinger 6413703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id( 6423703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6433703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6443703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6453703b2c5SNicholas Bellinger int *format_code, 6463703b2c5SNicholas Bellinger unsigned char *buf) 6473703b2c5SNicholas Bellinger { 6488359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6493703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6503703b2c5SNicholas Bellinger 6513703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6523703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6533703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6543703b2c5SNicholas Bellinger format_code, buf); 6553703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6563703b2c5SNicholas Bellinger return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6573703b2c5SNicholas Bellinger format_code, buf); 6583703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6593703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6603703b2c5SNicholas Bellinger format_code, buf); 6613703b2c5SNicholas Bellinger default: 6626708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6633703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6643703b2c5SNicholas Bellinger break; 6653703b2c5SNicholas Bellinger } 6663703b2c5SNicholas Bellinger 6673703b2c5SNicholas Bellinger return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, 6683703b2c5SNicholas Bellinger format_code, buf); 6693703b2c5SNicholas Bellinger } 6703703b2c5SNicholas Bellinger 6713703b2c5SNicholas Bellinger static u32 tcm_loop_get_pr_transport_id_len( 6723703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 6733703b2c5SNicholas Bellinger struct se_node_acl *se_nacl, 6743703b2c5SNicholas Bellinger struct t10_pr_registration *pr_reg, 6753703b2c5SNicholas Bellinger int *format_code) 6763703b2c5SNicholas Bellinger { 6778359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 6783703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 6793703b2c5SNicholas Bellinger 6803703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 6813703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 6823703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6833703b2c5SNicholas Bellinger format_code); 6843703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 6853703b2c5SNicholas Bellinger return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6863703b2c5SNicholas Bellinger format_code); 6873703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 6883703b2c5SNicholas Bellinger return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6893703b2c5SNicholas Bellinger format_code); 6903703b2c5SNicholas Bellinger default: 6916708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 6923703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 6933703b2c5SNicholas Bellinger break; 6943703b2c5SNicholas Bellinger } 6953703b2c5SNicholas Bellinger 6963703b2c5SNicholas Bellinger return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, 6973703b2c5SNicholas Bellinger format_code); 6983703b2c5SNicholas Bellinger } 6993703b2c5SNicholas Bellinger 7003703b2c5SNicholas Bellinger /* 7013703b2c5SNicholas Bellinger * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above 7023703b2c5SNicholas Bellinger * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. 7033703b2c5SNicholas Bellinger */ 7043703b2c5SNicholas Bellinger static char *tcm_loop_parse_pr_out_transport_id( 7053703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 7063703b2c5SNicholas Bellinger const char *buf, 7073703b2c5SNicholas Bellinger u32 *out_tid_len, 7083703b2c5SNicholas Bellinger char **port_nexus_ptr) 7093703b2c5SNicholas Bellinger { 7108359cf43SJörn Engel struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; 7113703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 7123703b2c5SNicholas Bellinger 7133703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 7143703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 7153703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7163703b2c5SNicholas Bellinger port_nexus_ptr); 7173703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 7183703b2c5SNicholas Bellinger return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7193703b2c5SNicholas Bellinger port_nexus_ptr); 7203703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 7213703b2c5SNicholas Bellinger return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7223703b2c5SNicholas Bellinger port_nexus_ptr); 7233703b2c5SNicholas Bellinger default: 7246708bb27SAndy Grover pr_err("Unknown tl_proto_id: 0x%02x, using" 7253703b2c5SNicholas Bellinger " SAS emulation\n", tl_hba->tl_proto_id); 7263703b2c5SNicholas Bellinger break; 7273703b2c5SNicholas Bellinger } 7283703b2c5SNicholas Bellinger 7293703b2c5SNicholas Bellinger return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, 7303703b2c5SNicholas Bellinger port_nexus_ptr); 7313703b2c5SNicholas Bellinger } 7323703b2c5SNicholas Bellinger 7333703b2c5SNicholas Bellinger /* 7343703b2c5SNicholas Bellinger * Returning (1) here allows for target_core_mod struct se_node_acl to be generated 7353703b2c5SNicholas Bellinger * based upon the incoming fabric dependent SCSI Initiator Port 7363703b2c5SNicholas Bellinger */ 7373703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) 7383703b2c5SNicholas Bellinger { 7393703b2c5SNicholas Bellinger return 1; 7403703b2c5SNicholas Bellinger } 7413703b2c5SNicholas Bellinger 7423703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) 7433703b2c5SNicholas Bellinger { 7443703b2c5SNicholas Bellinger return 0; 7453703b2c5SNicholas Bellinger } 7463703b2c5SNicholas Bellinger 7473703b2c5SNicholas Bellinger /* 7483703b2c5SNicholas Bellinger * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for 7493703b2c5SNicholas Bellinger * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest 7503703b2c5SNicholas Bellinger */ 7513703b2c5SNicholas Bellinger static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) 7523703b2c5SNicholas Bellinger { 7533703b2c5SNicholas Bellinger return 0; 7543703b2c5SNicholas Bellinger } 7553703b2c5SNicholas Bellinger 7563703b2c5SNicholas Bellinger /* 7573703b2c5SNicholas Bellinger * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will 7583703b2c5SNicholas Bellinger * never be called for TCM_Loop by target_core_fabric_configfs.c code. 7593703b2c5SNicholas Bellinger * It has been added here as a nop for target_fabric_tf_ops_check() 7603703b2c5SNicholas Bellinger */ 7613703b2c5SNicholas Bellinger static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) 7623703b2c5SNicholas Bellinger { 7633703b2c5SNicholas Bellinger return 0; 7643703b2c5SNicholas Bellinger } 7653703b2c5SNicholas Bellinger 7663703b2c5SNicholas Bellinger static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( 7673703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 7683703b2c5SNicholas Bellinger { 7693703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl; 7703703b2c5SNicholas Bellinger 7713703b2c5SNicholas Bellinger tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); 7723703b2c5SNicholas Bellinger if (!tl_nacl) { 7736708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_nacl\n"); 7743703b2c5SNicholas Bellinger return NULL; 7753703b2c5SNicholas Bellinger } 7763703b2c5SNicholas Bellinger 7773703b2c5SNicholas Bellinger return &tl_nacl->se_node_acl; 7783703b2c5SNicholas Bellinger } 7793703b2c5SNicholas Bellinger 7803703b2c5SNicholas Bellinger static void tcm_loop_tpg_release_fabric_acl( 7813703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 7823703b2c5SNicholas Bellinger struct se_node_acl *se_nacl) 7833703b2c5SNicholas Bellinger { 7843703b2c5SNicholas Bellinger struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, 7853703b2c5SNicholas Bellinger struct tcm_loop_nacl, se_node_acl); 7863703b2c5SNicholas Bellinger 7873703b2c5SNicholas Bellinger kfree(tl_nacl); 7883703b2c5SNicholas Bellinger } 7893703b2c5SNicholas Bellinger 7903703b2c5SNicholas Bellinger static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) 7913703b2c5SNicholas Bellinger { 7923703b2c5SNicholas Bellinger return 1; 7933703b2c5SNicholas Bellinger } 7943703b2c5SNicholas Bellinger 7953703b2c5SNicholas Bellinger static u32 tcm_loop_sess_get_index(struct se_session *se_sess) 7963703b2c5SNicholas Bellinger { 7973703b2c5SNicholas Bellinger return 1; 7983703b2c5SNicholas Bellinger } 7993703b2c5SNicholas Bellinger 8003703b2c5SNicholas Bellinger static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) 8013703b2c5SNicholas Bellinger { 8023703b2c5SNicholas Bellinger return; 8033703b2c5SNicholas Bellinger } 8043703b2c5SNicholas Bellinger 8053703b2c5SNicholas Bellinger static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) 8063703b2c5SNicholas Bellinger { 807969871cdSHannes Reinecke struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 808969871cdSHannes Reinecke struct tcm_loop_cmd, tl_se_cmd); 809969871cdSHannes Reinecke 810969871cdSHannes Reinecke return tl_cmd->sc_cmd_tag; 8113703b2c5SNicholas Bellinger } 8123703b2c5SNicholas Bellinger 8133703b2c5SNicholas Bellinger static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) 8143703b2c5SNicholas Bellinger { 8153703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8163703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8173703b2c5SNicholas Bellinger 8183703b2c5SNicholas Bellinger return tl_cmd->sc_cmd_state; 8193703b2c5SNicholas Bellinger } 8203703b2c5SNicholas Bellinger 8213703b2c5SNicholas Bellinger static int tcm_loop_shutdown_session(struct se_session *se_sess) 8223703b2c5SNicholas Bellinger { 8233703b2c5SNicholas Bellinger return 0; 8243703b2c5SNicholas Bellinger } 8253703b2c5SNicholas Bellinger 8263703b2c5SNicholas Bellinger static void tcm_loop_close_session(struct se_session *se_sess) 8273703b2c5SNicholas Bellinger { 8283703b2c5SNicholas Bellinger return; 8293703b2c5SNicholas Bellinger }; 8303703b2c5SNicholas Bellinger 8313703b2c5SNicholas Bellinger static int tcm_loop_write_pending(struct se_cmd *se_cmd) 8323703b2c5SNicholas Bellinger { 8333703b2c5SNicholas Bellinger /* 8343703b2c5SNicholas Bellinger * Since Linux/SCSI has already sent down a struct scsi_cmnd 8353703b2c5SNicholas Bellinger * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array 8363703b2c5SNicholas Bellinger * memory, and memory has already been mapped to struct se_cmd->t_mem_list 8373703b2c5SNicholas Bellinger * format with transport_generic_map_mem_to_cmd(). 8383703b2c5SNicholas Bellinger * 8393703b2c5SNicholas Bellinger * We now tell TCM to add this WRITE CDB directly into the TCM storage 8403703b2c5SNicholas Bellinger * object execution queue. 8413703b2c5SNicholas Bellinger */ 84270baf0abSChristoph Hellwig target_execute_cmd(se_cmd); 8433703b2c5SNicholas Bellinger return 0; 8443703b2c5SNicholas Bellinger } 8453703b2c5SNicholas Bellinger 8463703b2c5SNicholas Bellinger static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) 8473703b2c5SNicholas Bellinger { 8483703b2c5SNicholas Bellinger return 0; 8493703b2c5SNicholas Bellinger } 8503703b2c5SNicholas Bellinger 8513703b2c5SNicholas Bellinger static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) 8523703b2c5SNicholas Bellinger { 8533703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8543703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8553703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8563703b2c5SNicholas Bellinger 8576708bb27SAndy Grover pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" 8583703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8593703b2c5SNicholas Bellinger 8603703b2c5SNicholas Bellinger sc->result = SAM_STAT_GOOD; 8613703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8626cf3fa69SRoland Dreier if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || 8636cf3fa69SRoland Dreier (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) 8646cf3fa69SRoland Dreier scsi_set_resid(sc, se_cmd->residual_count); 8653703b2c5SNicholas Bellinger sc->scsi_done(sc); 8663703b2c5SNicholas Bellinger return 0; 8673703b2c5SNicholas Bellinger } 8683703b2c5SNicholas Bellinger 8693703b2c5SNicholas Bellinger static int tcm_loop_queue_status(struct se_cmd *se_cmd) 8703703b2c5SNicholas Bellinger { 8713703b2c5SNicholas Bellinger struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, 8723703b2c5SNicholas Bellinger struct tcm_loop_cmd, tl_se_cmd); 8733703b2c5SNicholas Bellinger struct scsi_cmnd *sc = tl_cmd->sc; 8743703b2c5SNicholas Bellinger 8756708bb27SAndy Grover pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" 8763703b2c5SNicholas Bellinger " cdb: 0x%02x\n", sc, sc->cmnd[0]); 8773703b2c5SNicholas Bellinger 8783703b2c5SNicholas Bellinger if (se_cmd->sense_buffer && 8793703b2c5SNicholas Bellinger ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 8803703b2c5SNicholas Bellinger (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 8813703b2c5SNicholas Bellinger 8825951146dSAndy Grover memcpy(sc->sense_buffer, se_cmd->sense_buffer, 8833703b2c5SNicholas Bellinger SCSI_SENSE_BUFFERSIZE); 8843703b2c5SNicholas Bellinger sc->result = SAM_STAT_CHECK_CONDITION; 8853703b2c5SNicholas Bellinger set_driver_byte(sc, DRIVER_SENSE); 8863703b2c5SNicholas Bellinger } else 8873703b2c5SNicholas Bellinger sc->result = se_cmd->scsi_status; 8883703b2c5SNicholas Bellinger 8893703b2c5SNicholas Bellinger set_host_byte(sc, DID_OK); 8906cf3fa69SRoland Dreier if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || 8916cf3fa69SRoland Dreier (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) 8926cf3fa69SRoland Dreier scsi_set_resid(sc, se_cmd->residual_count); 8933703b2c5SNicholas Bellinger sc->scsi_done(sc); 8943703b2c5SNicholas Bellinger return 0; 8953703b2c5SNicholas Bellinger } 8963703b2c5SNicholas Bellinger 897b79fafacSJoern Engel static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) 8983703b2c5SNicholas Bellinger { 8993703b2c5SNicholas Bellinger struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 9003703b2c5SNicholas Bellinger struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; 9013703b2c5SNicholas Bellinger /* 9023703b2c5SNicholas Bellinger * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead 9033703b2c5SNicholas Bellinger * and wake up the wait_queue_head_t in tcm_loop_device_reset() 9043703b2c5SNicholas Bellinger */ 9053703b2c5SNicholas Bellinger atomic_set(&tl_tmr->tmr_complete, 1); 9063703b2c5SNicholas Bellinger wake_up(&tl_tmr->tl_tmr_wait); 9073703b2c5SNicholas Bellinger } 9083703b2c5SNicholas Bellinger 909131e6abcSNicholas Bellinger static void tcm_loop_aborted_task(struct se_cmd *se_cmd) 910131e6abcSNicholas Bellinger { 911131e6abcSNicholas Bellinger return; 912131e6abcSNicholas Bellinger } 913131e6abcSNicholas Bellinger 9143703b2c5SNicholas Bellinger static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) 9153703b2c5SNicholas Bellinger { 9163703b2c5SNicholas Bellinger switch (tl_hba->tl_proto_id) { 9173703b2c5SNicholas Bellinger case SCSI_PROTOCOL_SAS: 9183703b2c5SNicholas Bellinger return "SAS"; 9193703b2c5SNicholas Bellinger case SCSI_PROTOCOL_FCP: 9203703b2c5SNicholas Bellinger return "FCP"; 9213703b2c5SNicholas Bellinger case SCSI_PROTOCOL_ISCSI: 9223703b2c5SNicholas Bellinger return "iSCSI"; 9233703b2c5SNicholas Bellinger default: 9243703b2c5SNicholas Bellinger break; 9253703b2c5SNicholas Bellinger } 9263703b2c5SNicholas Bellinger 9273703b2c5SNicholas Bellinger return "Unknown"; 9283703b2c5SNicholas Bellinger } 9293703b2c5SNicholas Bellinger 9303703b2c5SNicholas Bellinger /* Start items for tcm_loop_port_cit */ 9313703b2c5SNicholas Bellinger 9323703b2c5SNicholas Bellinger static int tcm_loop_port_link( 9333703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9343703b2c5SNicholas Bellinger struct se_lun *lun) 9353703b2c5SNicholas Bellinger { 9363703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 9373703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 9383703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9393703b2c5SNicholas Bellinger 94033940d09SJoern Engel atomic_inc_mb(&tl_tpg->tl_tpg_port_count); 9413703b2c5SNicholas Bellinger /* 9423703b2c5SNicholas Bellinger * Add Linux/SCSI struct scsi_device by HCTL 9433703b2c5SNicholas Bellinger */ 9443703b2c5SNicholas Bellinger scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); 9453703b2c5SNicholas Bellinger 9466708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); 9473703b2c5SNicholas Bellinger return 0; 9483703b2c5SNicholas Bellinger } 9493703b2c5SNicholas Bellinger 9503703b2c5SNicholas Bellinger static void tcm_loop_port_unlink( 9513703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 9523703b2c5SNicholas Bellinger struct se_lun *se_lun) 9533703b2c5SNicholas Bellinger { 9543703b2c5SNicholas Bellinger struct scsi_device *sd; 9553703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 9563703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 9573703b2c5SNicholas Bellinger 9583703b2c5SNicholas Bellinger tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); 9593703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 9603703b2c5SNicholas Bellinger 9613703b2c5SNicholas Bellinger sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, 9623703b2c5SNicholas Bellinger se_lun->unpacked_lun); 9633703b2c5SNicholas Bellinger if (!sd) { 9646708bb27SAndy Grover pr_err("Unable to locate struct scsi_device for %d:%d:" 9653703b2c5SNicholas Bellinger "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); 9663703b2c5SNicholas Bellinger return; 9673703b2c5SNicholas Bellinger } 9683703b2c5SNicholas Bellinger /* 9693703b2c5SNicholas Bellinger * Remove Linux/SCSI struct scsi_device by HCTL 9703703b2c5SNicholas Bellinger */ 9713703b2c5SNicholas Bellinger scsi_remove_device(sd); 9723703b2c5SNicholas Bellinger scsi_device_put(sd); 9733703b2c5SNicholas Bellinger 97433940d09SJoern Engel atomic_dec_mb(&tl_tpg->tl_tpg_port_count); 9753703b2c5SNicholas Bellinger 9766708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); 9773703b2c5SNicholas Bellinger } 9783703b2c5SNicholas Bellinger 9793703b2c5SNicholas Bellinger /* End items for tcm_loop_port_cit */ 9803703b2c5SNicholas Bellinger 9813703b2c5SNicholas Bellinger /* Start items for tcm_loop_nexus_cit */ 9823703b2c5SNicholas Bellinger 9833703b2c5SNicholas Bellinger static int tcm_loop_make_nexus( 9843703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg, 9853703b2c5SNicholas Bellinger const char *name) 9863703b2c5SNicholas Bellinger { 9873703b2c5SNicholas Bellinger struct se_portal_group *se_tpg; 9883703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 9893703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 990552523dcSDan Carpenter int ret = -ENOMEM; 9913703b2c5SNicholas Bellinger 992506787a2SHannes Reinecke if (tl_tpg->tl_nexus) { 993506787a2SHannes Reinecke pr_debug("tl_tpg->tl_nexus already exists\n"); 9943703b2c5SNicholas Bellinger return -EEXIST; 9953703b2c5SNicholas Bellinger } 9963703b2c5SNicholas Bellinger se_tpg = &tl_tpg->tl_se_tpg; 9973703b2c5SNicholas Bellinger 9983703b2c5SNicholas Bellinger tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); 9993703b2c5SNicholas Bellinger if (!tl_nexus) { 10006708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_nexus\n"); 10013703b2c5SNicholas Bellinger return -ENOMEM; 10023703b2c5SNicholas Bellinger } 10033703b2c5SNicholas Bellinger /* 10043703b2c5SNicholas Bellinger * Initialize the struct se_session pointer 10053703b2c5SNicholas Bellinger */ 1006e70beee7SNicholas Bellinger tl_nexus->se_sess = transport_init_session(TARGET_PROT_ALL); 1007552523dcSDan Carpenter if (IS_ERR(tl_nexus->se_sess)) { 1008552523dcSDan Carpenter ret = PTR_ERR(tl_nexus->se_sess); 10093703b2c5SNicholas Bellinger goto out; 1010552523dcSDan Carpenter } 10113703b2c5SNicholas Bellinger /* 10123703b2c5SNicholas Bellinger * Since we are running in 'demo mode' this call with generate a 10133703b2c5SNicholas Bellinger * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI 10143703b2c5SNicholas Bellinger * Initiator port name of the passed configfs group 'name'. 10153703b2c5SNicholas Bellinger */ 10163703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( 10173703b2c5SNicholas Bellinger se_tpg, (unsigned char *)name); 10183703b2c5SNicholas Bellinger if (!tl_nexus->se_sess->se_node_acl) { 10193703b2c5SNicholas Bellinger transport_free_session(tl_nexus->se_sess); 10203703b2c5SNicholas Bellinger goto out; 10213703b2c5SNicholas Bellinger } 10223703b2c5SNicholas Bellinger /* 10233703b2c5SNicholas Bellinger * Now, register the SAS I_T Nexus as active with the call to 10243703b2c5SNicholas Bellinger * transport_register_session() 10253703b2c5SNicholas Bellinger */ 10263703b2c5SNicholas Bellinger __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, 10275951146dSAndy Grover tl_nexus->se_sess, tl_nexus); 1028506787a2SHannes Reinecke tl_tpg->tl_nexus = tl_nexus; 10296708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" 10303703b2c5SNicholas Bellinger " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), 10313703b2c5SNicholas Bellinger name); 10323703b2c5SNicholas Bellinger return 0; 10333703b2c5SNicholas Bellinger 10343703b2c5SNicholas Bellinger out: 10353703b2c5SNicholas Bellinger kfree(tl_nexus); 1036552523dcSDan Carpenter return ret; 10373703b2c5SNicholas Bellinger } 10383703b2c5SNicholas Bellinger 10393703b2c5SNicholas Bellinger static int tcm_loop_drop_nexus( 10403703b2c5SNicholas Bellinger struct tcm_loop_tpg *tpg) 10413703b2c5SNicholas Bellinger { 10423703b2c5SNicholas Bellinger struct se_session *se_sess; 10433703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10443703b2c5SNicholas Bellinger 1045506787a2SHannes Reinecke tl_nexus = tpg->tl_nexus; 10463703b2c5SNicholas Bellinger if (!tl_nexus) 10473703b2c5SNicholas Bellinger return -ENODEV; 10483703b2c5SNicholas Bellinger 10493703b2c5SNicholas Bellinger se_sess = tl_nexus->se_sess; 10503703b2c5SNicholas Bellinger if (!se_sess) 10513703b2c5SNicholas Bellinger return -ENODEV; 10523703b2c5SNicholas Bellinger 10533703b2c5SNicholas Bellinger if (atomic_read(&tpg->tl_tpg_port_count)) { 10546708bb27SAndy Grover pr_err("Unable to remove TCM_Loop I_T Nexus with" 10553703b2c5SNicholas Bellinger " active TPG port count: %d\n", 10563703b2c5SNicholas Bellinger atomic_read(&tpg->tl_tpg_port_count)); 10573703b2c5SNicholas Bellinger return -EPERM; 10583703b2c5SNicholas Bellinger } 10593703b2c5SNicholas Bellinger 10606708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" 1061506787a2SHannes Reinecke " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tpg->tl_hba), 10623703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10633703b2c5SNicholas Bellinger /* 10643703b2c5SNicholas Bellinger * Release the SCSI I_T Nexus to the emulated SAS Target Port 10653703b2c5SNicholas Bellinger */ 10663703b2c5SNicholas Bellinger transport_deregister_session(tl_nexus->se_sess); 1067506787a2SHannes Reinecke tpg->tl_nexus = NULL; 10683703b2c5SNicholas Bellinger kfree(tl_nexus); 10693703b2c5SNicholas Bellinger return 0; 10703703b2c5SNicholas Bellinger } 10713703b2c5SNicholas Bellinger 10723703b2c5SNicholas Bellinger /* End items for tcm_loop_nexus_cit */ 10733703b2c5SNicholas Bellinger 10743703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_show_nexus( 10753703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 10763703b2c5SNicholas Bellinger char *page) 10773703b2c5SNicholas Bellinger { 10783703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 10793703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 10803703b2c5SNicholas Bellinger struct tcm_loop_nexus *tl_nexus; 10813703b2c5SNicholas Bellinger ssize_t ret; 10823703b2c5SNicholas Bellinger 1083506787a2SHannes Reinecke tl_nexus = tl_tpg->tl_nexus; 10843703b2c5SNicholas Bellinger if (!tl_nexus) 10853703b2c5SNicholas Bellinger return -ENODEV; 10863703b2c5SNicholas Bellinger 10873703b2c5SNicholas Bellinger ret = snprintf(page, PAGE_SIZE, "%s\n", 10883703b2c5SNicholas Bellinger tl_nexus->se_sess->se_node_acl->initiatorname); 10893703b2c5SNicholas Bellinger 10903703b2c5SNicholas Bellinger return ret; 10913703b2c5SNicholas Bellinger } 10923703b2c5SNicholas Bellinger 10933703b2c5SNicholas Bellinger static ssize_t tcm_loop_tpg_store_nexus( 10943703b2c5SNicholas Bellinger struct se_portal_group *se_tpg, 10953703b2c5SNicholas Bellinger const char *page, 10963703b2c5SNicholas Bellinger size_t count) 10973703b2c5SNicholas Bellinger { 10983703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 10993703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 11003703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; 11013703b2c5SNicholas Bellinger unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; 11023703b2c5SNicholas Bellinger int ret; 11033703b2c5SNicholas Bellinger /* 11043703b2c5SNicholas Bellinger * Shutdown the active I_T nexus if 'NULL' is passed.. 11053703b2c5SNicholas Bellinger */ 11063703b2c5SNicholas Bellinger if (!strncmp(page, "NULL", 4)) { 11073703b2c5SNicholas Bellinger ret = tcm_loop_drop_nexus(tl_tpg); 11083703b2c5SNicholas Bellinger return (!ret) ? count : ret; 11093703b2c5SNicholas Bellinger } 11103703b2c5SNicholas Bellinger /* 11113703b2c5SNicholas Bellinger * Otherwise make sure the passed virtual Initiator port WWN matches 11123703b2c5SNicholas Bellinger * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call 11133703b2c5SNicholas Bellinger * tcm_loop_make_nexus() 11143703b2c5SNicholas Bellinger */ 111560d645a4SDan Carpenter if (strlen(page) >= TL_WWN_ADDR_LEN) { 11166708bb27SAndy Grover pr_err("Emulated NAA Sas Address: %s, exceeds" 11173703b2c5SNicholas Bellinger " max: %d\n", page, TL_WWN_ADDR_LEN); 11183703b2c5SNicholas Bellinger return -EINVAL; 11193703b2c5SNicholas Bellinger } 11203703b2c5SNicholas Bellinger snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); 11213703b2c5SNicholas Bellinger 11223703b2c5SNicholas Bellinger ptr = strstr(i_port, "naa."); 11233703b2c5SNicholas Bellinger if (ptr) { 11243703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { 11256708bb27SAndy Grover pr_err("Passed SAS Initiator Port %s does not" 11263703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11273703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11283703b2c5SNicholas Bellinger return -EINVAL; 11293703b2c5SNicholas Bellinger } 11303703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11313703b2c5SNicholas Bellinger goto check_newline; 11323703b2c5SNicholas Bellinger } 11333703b2c5SNicholas Bellinger ptr = strstr(i_port, "fc."); 11343703b2c5SNicholas Bellinger if (ptr) { 11353703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { 11366708bb27SAndy Grover pr_err("Passed FCP Initiator Port %s does not" 11373703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11383703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11393703b2c5SNicholas Bellinger return -EINVAL; 11403703b2c5SNicholas Bellinger } 11413703b2c5SNicholas Bellinger port_ptr = &i_port[3]; /* Skip over "fc." */ 11423703b2c5SNicholas Bellinger goto check_newline; 11433703b2c5SNicholas Bellinger } 11443703b2c5SNicholas Bellinger ptr = strstr(i_port, "iqn."); 11453703b2c5SNicholas Bellinger if (ptr) { 11463703b2c5SNicholas Bellinger if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { 11476708bb27SAndy Grover pr_err("Passed iSCSI Initiator Port %s does not" 11483703b2c5SNicholas Bellinger " match target port protoid: %s\n", i_port, 11493703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba)); 11503703b2c5SNicholas Bellinger return -EINVAL; 11513703b2c5SNicholas Bellinger } 11523703b2c5SNicholas Bellinger port_ptr = &i_port[0]; 11533703b2c5SNicholas Bellinger goto check_newline; 11543703b2c5SNicholas Bellinger } 11556708bb27SAndy Grover pr_err("Unable to locate prefix for emulated Initiator Port:" 11563703b2c5SNicholas Bellinger " %s\n", i_port); 11573703b2c5SNicholas Bellinger return -EINVAL; 11583703b2c5SNicholas Bellinger /* 11593703b2c5SNicholas Bellinger * Clear any trailing newline for the NAA WWN 11603703b2c5SNicholas Bellinger */ 11613703b2c5SNicholas Bellinger check_newline: 11623703b2c5SNicholas Bellinger if (i_port[strlen(i_port)-1] == '\n') 11633703b2c5SNicholas Bellinger i_port[strlen(i_port)-1] = '\0'; 11643703b2c5SNicholas Bellinger 11653703b2c5SNicholas Bellinger ret = tcm_loop_make_nexus(tl_tpg, port_ptr); 11663703b2c5SNicholas Bellinger if (ret < 0) 11673703b2c5SNicholas Bellinger return ret; 11683703b2c5SNicholas Bellinger 11693703b2c5SNicholas Bellinger return count; 11703703b2c5SNicholas Bellinger } 11713703b2c5SNicholas Bellinger 11723703b2c5SNicholas Bellinger TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); 11733703b2c5SNicholas Bellinger 1174fb2b2844SHannes Reinecke static ssize_t tcm_loop_tpg_show_transport_status( 1175fb2b2844SHannes Reinecke struct se_portal_group *se_tpg, 1176fb2b2844SHannes Reinecke char *page) 1177fb2b2844SHannes Reinecke { 1178fb2b2844SHannes Reinecke struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 1179fb2b2844SHannes Reinecke struct tcm_loop_tpg, tl_se_tpg); 1180fb2b2844SHannes Reinecke const char *status = NULL; 1181fb2b2844SHannes Reinecke ssize_t ret = -EINVAL; 1182fb2b2844SHannes Reinecke 1183fb2b2844SHannes Reinecke switch (tl_tpg->tl_transport_status) { 1184fb2b2844SHannes Reinecke case TCM_TRANSPORT_ONLINE: 1185fb2b2844SHannes Reinecke status = "online"; 1186fb2b2844SHannes Reinecke break; 1187fb2b2844SHannes Reinecke case TCM_TRANSPORT_OFFLINE: 1188fb2b2844SHannes Reinecke status = "offline"; 1189fb2b2844SHannes Reinecke break; 1190fb2b2844SHannes Reinecke default: 1191fb2b2844SHannes Reinecke break; 1192fb2b2844SHannes Reinecke } 1193fb2b2844SHannes Reinecke 1194fb2b2844SHannes Reinecke if (status) 1195fb2b2844SHannes Reinecke ret = snprintf(page, PAGE_SIZE, "%s\n", status); 1196fb2b2844SHannes Reinecke 1197fb2b2844SHannes Reinecke return ret; 1198fb2b2844SHannes Reinecke } 1199fb2b2844SHannes Reinecke 1200fb2b2844SHannes Reinecke static ssize_t tcm_loop_tpg_store_transport_status( 1201fb2b2844SHannes Reinecke struct se_portal_group *se_tpg, 1202fb2b2844SHannes Reinecke const char *page, 1203fb2b2844SHannes Reinecke size_t count) 1204fb2b2844SHannes Reinecke { 1205fb2b2844SHannes Reinecke struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 1206fb2b2844SHannes Reinecke struct tcm_loop_tpg, tl_se_tpg); 1207fb2b2844SHannes Reinecke 1208fb2b2844SHannes Reinecke if (!strncmp(page, "online", 6)) { 1209fb2b2844SHannes Reinecke tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; 1210fb2b2844SHannes Reinecke return count; 1211fb2b2844SHannes Reinecke } 1212fb2b2844SHannes Reinecke if (!strncmp(page, "offline", 7)) { 1213fb2b2844SHannes Reinecke tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE; 1214fb2b2844SHannes Reinecke return count; 1215fb2b2844SHannes Reinecke } 1216fb2b2844SHannes Reinecke return -EINVAL; 1217fb2b2844SHannes Reinecke } 1218fb2b2844SHannes Reinecke 1219fb2b2844SHannes Reinecke TF_TPG_BASE_ATTR(tcm_loop, transport_status, S_IRUGO | S_IWUSR); 1220fb2b2844SHannes Reinecke 12213703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_tpg_attrs[] = { 12223703b2c5SNicholas Bellinger &tcm_loop_tpg_nexus.attr, 1223fb2b2844SHannes Reinecke &tcm_loop_tpg_transport_status.attr, 12243703b2c5SNicholas Bellinger NULL, 12253703b2c5SNicholas Bellinger }; 12263703b2c5SNicholas Bellinger 12273703b2c5SNicholas Bellinger /* Start items for tcm_loop_naa_cit */ 12283703b2c5SNicholas Bellinger 1229f0a6c693SRashika Kheria static struct se_portal_group *tcm_loop_make_naa_tpg( 12303703b2c5SNicholas Bellinger struct se_wwn *wwn, 12313703b2c5SNicholas Bellinger struct config_group *group, 12323703b2c5SNicholas Bellinger const char *name) 12333703b2c5SNicholas Bellinger { 12343703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 12353703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 12363703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg; 12373703b2c5SNicholas Bellinger char *tpgt_str, *end_ptr; 12383703b2c5SNicholas Bellinger int ret; 12393703b2c5SNicholas Bellinger unsigned short int tpgt; 12403703b2c5SNicholas Bellinger 12413703b2c5SNicholas Bellinger tpgt_str = strstr(name, "tpgt_"); 12423703b2c5SNicholas Bellinger if (!tpgt_str) { 12436708bb27SAndy Grover pr_err("Unable to locate \"tpgt_#\" directory" 12443703b2c5SNicholas Bellinger " group\n"); 12453703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12463703b2c5SNicholas Bellinger } 12473703b2c5SNicholas Bellinger tpgt_str += 5; /* Skip ahead of "tpgt_" */ 12483703b2c5SNicholas Bellinger tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); 12493703b2c5SNicholas Bellinger 125012f09ccbSDan Carpenter if (tpgt >= TL_TPGS_PER_HBA) { 12516708bb27SAndy Grover pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" 12523703b2c5SNicholas Bellinger " %u\n", tpgt, TL_TPGS_PER_HBA); 12533703b2c5SNicholas Bellinger return ERR_PTR(-EINVAL); 12543703b2c5SNicholas Bellinger } 12553703b2c5SNicholas Bellinger tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; 12563703b2c5SNicholas Bellinger tl_tpg->tl_hba = tl_hba; 12573703b2c5SNicholas Bellinger tl_tpg->tl_tpgt = tpgt; 12583703b2c5SNicholas Bellinger /* 12593703b2c5SNicholas Bellinger * Register the tl_tpg as a emulated SAS TCM Target Endpoint 12603703b2c5SNicholas Bellinger */ 12613703b2c5SNicholas Bellinger ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, 12625951146dSAndy Grover wwn, &tl_tpg->tl_se_tpg, tl_tpg, 12633703b2c5SNicholas Bellinger TRANSPORT_TPG_TYPE_NORMAL); 12643703b2c5SNicholas Bellinger if (ret < 0) 12653703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 12663703b2c5SNicholas Bellinger 12676708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" 12683703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12693703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 12703703b2c5SNicholas Bellinger 12713703b2c5SNicholas Bellinger return &tl_tpg->tl_se_tpg; 12723703b2c5SNicholas Bellinger } 12733703b2c5SNicholas Bellinger 1274f0a6c693SRashika Kheria static void tcm_loop_drop_naa_tpg( 12753703b2c5SNicholas Bellinger struct se_portal_group *se_tpg) 12763703b2c5SNicholas Bellinger { 12773703b2c5SNicholas Bellinger struct se_wwn *wwn = se_tpg->se_tpg_wwn; 12783703b2c5SNicholas Bellinger struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, 12793703b2c5SNicholas Bellinger struct tcm_loop_tpg, tl_se_tpg); 12803703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 12813703b2c5SNicholas Bellinger unsigned short tpgt; 12823703b2c5SNicholas Bellinger 12833703b2c5SNicholas Bellinger tl_hba = tl_tpg->tl_hba; 12843703b2c5SNicholas Bellinger tpgt = tl_tpg->tl_tpgt; 12853703b2c5SNicholas Bellinger /* 12863703b2c5SNicholas Bellinger * Release the I_T Nexus for the Virtual SAS link if present 12873703b2c5SNicholas Bellinger */ 12883703b2c5SNicholas Bellinger tcm_loop_drop_nexus(tl_tpg); 12893703b2c5SNicholas Bellinger /* 12903703b2c5SNicholas Bellinger * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint 12913703b2c5SNicholas Bellinger */ 12923703b2c5SNicholas Bellinger core_tpg_deregister(se_tpg); 12933703b2c5SNicholas Bellinger 12940a020436SNicholas Bellinger tl_tpg->tl_hba = NULL; 12950a020436SNicholas Bellinger tl_tpg->tl_tpgt = 0; 12960a020436SNicholas Bellinger 12976708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" 12983703b2c5SNicholas Bellinger " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), 12993703b2c5SNicholas Bellinger config_item_name(&wwn->wwn_group.cg_item), tpgt); 13003703b2c5SNicholas Bellinger } 13013703b2c5SNicholas Bellinger 13023703b2c5SNicholas Bellinger /* End items for tcm_loop_naa_cit */ 13033703b2c5SNicholas Bellinger 13043703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 13053703b2c5SNicholas Bellinger 1306f0a6c693SRashika Kheria static struct se_wwn *tcm_loop_make_scsi_hba( 13073703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 13083703b2c5SNicholas Bellinger struct config_group *group, 13093703b2c5SNicholas Bellinger const char *name) 13103703b2c5SNicholas Bellinger { 13113703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba; 13123703b2c5SNicholas Bellinger struct Scsi_Host *sh; 13133703b2c5SNicholas Bellinger char *ptr; 13143703b2c5SNicholas Bellinger int ret, off = 0; 13153703b2c5SNicholas Bellinger 13163703b2c5SNicholas Bellinger tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); 13173703b2c5SNicholas Bellinger if (!tl_hba) { 13186708bb27SAndy Grover pr_err("Unable to allocate struct tcm_loop_hba\n"); 13193703b2c5SNicholas Bellinger return ERR_PTR(-ENOMEM); 13203703b2c5SNicholas Bellinger } 13213703b2c5SNicholas Bellinger /* 13223703b2c5SNicholas Bellinger * Determine the emulated Protocol Identifier and Target Port Name 13233703b2c5SNicholas Bellinger * based on the incoming configfs directory name. 13243703b2c5SNicholas Bellinger */ 13253703b2c5SNicholas Bellinger ptr = strstr(name, "naa."); 13263703b2c5SNicholas Bellinger if (ptr) { 13273703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; 13283703b2c5SNicholas Bellinger goto check_len; 13293703b2c5SNicholas Bellinger } 13303703b2c5SNicholas Bellinger ptr = strstr(name, "fc."); 13313703b2c5SNicholas Bellinger if (ptr) { 13323703b2c5SNicholas Bellinger tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; 13333703b2c5SNicholas Bellinger off = 3; /* Skip over "fc." */ 13343703b2c5SNicholas Bellinger goto check_len; 13353703b2c5SNicholas Bellinger } 13363703b2c5SNicholas Bellinger ptr = strstr(name, "iqn."); 1337a57b5d36SJesper Juhl if (!ptr) { 13386708bb27SAndy Grover pr_err("Unable to locate prefix for emulated Target " 1339a57b5d36SJesper Juhl "Port: %s\n", name); 1340a57b5d36SJesper Juhl ret = -EINVAL; 1341a57b5d36SJesper Juhl goto out; 13423703b2c5SNicholas Bellinger } 1343a57b5d36SJesper Juhl tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; 13443703b2c5SNicholas Bellinger 13453703b2c5SNicholas Bellinger check_len: 134660d645a4SDan Carpenter if (strlen(name) >= TL_WWN_ADDR_LEN) { 13476708bb27SAndy Grover pr_err("Emulated NAA %s Address: %s, exceeds" 13483703b2c5SNicholas Bellinger " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), 13493703b2c5SNicholas Bellinger TL_WWN_ADDR_LEN); 1350a57b5d36SJesper Juhl ret = -EINVAL; 1351a57b5d36SJesper Juhl goto out; 13523703b2c5SNicholas Bellinger } 13533703b2c5SNicholas Bellinger snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); 13543703b2c5SNicholas Bellinger 13553703b2c5SNicholas Bellinger /* 13563703b2c5SNicholas Bellinger * Call device_register(tl_hba->dev) to register the emulated 13573703b2c5SNicholas Bellinger * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after 13583703b2c5SNicholas Bellinger * device_register() callbacks in tcm_loop_driver_probe() 13593703b2c5SNicholas Bellinger */ 13603703b2c5SNicholas Bellinger ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); 13613703b2c5SNicholas Bellinger if (ret) 13623703b2c5SNicholas Bellinger goto out; 13633703b2c5SNicholas Bellinger 13643703b2c5SNicholas Bellinger sh = tl_hba->sh; 13653703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt++; 13666708bb27SAndy Grover pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" 13673703b2c5SNicholas Bellinger " %s Address: %s at Linux/SCSI Host ID: %d\n", 13683703b2c5SNicholas Bellinger tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); 13693703b2c5SNicholas Bellinger 13703703b2c5SNicholas Bellinger return &tl_hba->tl_hba_wwn; 13713703b2c5SNicholas Bellinger out: 13723703b2c5SNicholas Bellinger kfree(tl_hba); 13733703b2c5SNicholas Bellinger return ERR_PTR(ret); 13743703b2c5SNicholas Bellinger } 13753703b2c5SNicholas Bellinger 1376f0a6c693SRashika Kheria static void tcm_loop_drop_scsi_hba( 13773703b2c5SNicholas Bellinger struct se_wwn *wwn) 13783703b2c5SNicholas Bellinger { 13793703b2c5SNicholas Bellinger struct tcm_loop_hba *tl_hba = container_of(wwn, 13803703b2c5SNicholas Bellinger struct tcm_loop_hba, tl_hba_wwn); 13816297b07cSNicholas Bellinger 13826297b07cSNicholas Bellinger pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target" 13836297b07cSNicholas Bellinger " SAS Address: %s at Linux/SCSI Host ID: %d\n", 13846297b07cSNicholas Bellinger tl_hba->tl_wwn_address, tl_hba->sh->host_no); 13853703b2c5SNicholas Bellinger /* 13863703b2c5SNicholas Bellinger * Call device_unregister() on the original tl_hba->dev. 13873703b2c5SNicholas Bellinger * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will 13883703b2c5SNicholas Bellinger * release *tl_hba; 13893703b2c5SNicholas Bellinger */ 13903703b2c5SNicholas Bellinger device_unregister(&tl_hba->dev); 13913703b2c5SNicholas Bellinger } 13923703b2c5SNicholas Bellinger 13933703b2c5SNicholas Bellinger /* Start items for tcm_loop_cit */ 13943703b2c5SNicholas Bellinger static ssize_t tcm_loop_wwn_show_attr_version( 13953703b2c5SNicholas Bellinger struct target_fabric_configfs *tf, 13963703b2c5SNicholas Bellinger char *page) 13973703b2c5SNicholas Bellinger { 13983703b2c5SNicholas Bellinger return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); 13993703b2c5SNicholas Bellinger } 14003703b2c5SNicholas Bellinger 14013703b2c5SNicholas Bellinger TF_WWN_ATTR_RO(tcm_loop, version); 14023703b2c5SNicholas Bellinger 14033703b2c5SNicholas Bellinger static struct configfs_attribute *tcm_loop_wwn_attrs[] = { 14043703b2c5SNicholas Bellinger &tcm_loop_wwn_version.attr, 14053703b2c5SNicholas Bellinger NULL, 14063703b2c5SNicholas Bellinger }; 14073703b2c5SNicholas Bellinger 14083703b2c5SNicholas Bellinger /* End items for tcm_loop_cit */ 14093703b2c5SNicholas Bellinger 14103703b2c5SNicholas Bellinger static int tcm_loop_register_configfs(void) 14113703b2c5SNicholas Bellinger { 14123703b2c5SNicholas Bellinger struct target_fabric_configfs *fabric; 14133703b2c5SNicholas Bellinger int ret; 14143703b2c5SNicholas Bellinger /* 14153703b2c5SNicholas Bellinger * Set the TCM Loop HBA counter to zero 14163703b2c5SNicholas Bellinger */ 14173703b2c5SNicholas Bellinger tcm_loop_hba_no_cnt = 0; 14183703b2c5SNicholas Bellinger /* 14193703b2c5SNicholas Bellinger * Register the top level struct config_item_type with TCM core 14203703b2c5SNicholas Bellinger */ 14213703b2c5SNicholas Bellinger fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); 1422e3d6f909SAndy Grover if (IS_ERR(fabric)) { 14236708bb27SAndy Grover pr_err("tcm_loop_register_configfs() failed!\n"); 1424e3d6f909SAndy Grover return PTR_ERR(fabric); 14253703b2c5SNicholas Bellinger } 14263703b2c5SNicholas Bellinger /* 14273703b2c5SNicholas Bellinger * Setup the fabric API of function pointers used by target_core_mod 14283703b2c5SNicholas Bellinger */ 14293703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; 14303703b2c5SNicholas Bellinger fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; 14313703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; 14323703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; 14333703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; 14343703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; 14353703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_pr_transport_id_len = 14363703b2c5SNicholas Bellinger &tcm_loop_get_pr_transport_id_len; 14373703b2c5SNicholas Bellinger fabric->tf_ops.tpg_parse_pr_out_transport_id = 14383703b2c5SNicholas Bellinger &tcm_loop_parse_pr_out_transport_id; 14393703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; 14403703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_cache = 14413703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_cache; 14423703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_demo_mode_write_protect = 14433703b2c5SNicholas Bellinger &tcm_loop_check_demo_mode_write_protect; 14443703b2c5SNicholas Bellinger fabric->tf_ops.tpg_check_prod_mode_write_protect = 14453703b2c5SNicholas Bellinger &tcm_loop_check_prod_mode_write_protect; 14463703b2c5SNicholas Bellinger /* 14473703b2c5SNicholas Bellinger * The TCM loopback fabric module runs in demo-mode to a local 14483703b2c5SNicholas Bellinger * virtual SCSI device, so fabric dependent initator ACLs are 14493703b2c5SNicholas Bellinger * not required. 14503703b2c5SNicholas Bellinger */ 14513703b2c5SNicholas Bellinger fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; 14523703b2c5SNicholas Bellinger fabric->tf_ops.tpg_release_fabric_acl = 14533703b2c5SNicholas Bellinger &tcm_loop_tpg_release_fabric_acl; 14543703b2c5SNicholas Bellinger fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; 14553703b2c5SNicholas Bellinger /* 14563703b2c5SNicholas Bellinger * Used for setting up remaining TCM resources in process context 14573703b2c5SNicholas Bellinger */ 14583703b2c5SNicholas Bellinger fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; 145935462975SChristoph Hellwig fabric->tf_ops.release_cmd = &tcm_loop_release_cmd; 14603703b2c5SNicholas Bellinger fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; 14613703b2c5SNicholas Bellinger fabric->tf_ops.close_session = &tcm_loop_close_session; 14623703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; 14633703b2c5SNicholas Bellinger fabric->tf_ops.sess_get_initiator_sid = NULL; 14643703b2c5SNicholas Bellinger fabric->tf_ops.write_pending = &tcm_loop_write_pending; 14653703b2c5SNicholas Bellinger fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; 14663703b2c5SNicholas Bellinger /* 14673703b2c5SNicholas Bellinger * Not used for TCM loopback 14683703b2c5SNicholas Bellinger */ 14693703b2c5SNicholas Bellinger fabric->tf_ops.set_default_node_attributes = 14703703b2c5SNicholas Bellinger &tcm_loop_set_default_node_attributes; 14713703b2c5SNicholas Bellinger fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; 14723703b2c5SNicholas Bellinger fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; 14733703b2c5SNicholas Bellinger fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; 14743703b2c5SNicholas Bellinger fabric->tf_ops.queue_status = &tcm_loop_queue_status; 14753703b2c5SNicholas Bellinger fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; 1476131e6abcSNicholas Bellinger fabric->tf_ops.aborted_task = &tcm_loop_aborted_task; 14773703b2c5SNicholas Bellinger 14783703b2c5SNicholas Bellinger /* 14793703b2c5SNicholas Bellinger * Setup function pointers for generic logic in target_core_fabric_configfs.c 14803703b2c5SNicholas Bellinger */ 14813703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; 14823703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; 14833703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; 14843703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; 14853703b2c5SNicholas Bellinger /* 14863703b2c5SNicholas Bellinger * fabric_post_link() and fabric_pre_unlink() are used for 14873703b2c5SNicholas Bellinger * registration and release of TCM Loop Virtual SCSI LUNs. 14883703b2c5SNicholas Bellinger */ 14893703b2c5SNicholas Bellinger fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; 14903703b2c5SNicholas Bellinger fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; 14913703b2c5SNicholas Bellinger fabric->tf_ops.fabric_make_np = NULL; 14923703b2c5SNicholas Bellinger fabric->tf_ops.fabric_drop_np = NULL; 14933703b2c5SNicholas Bellinger /* 14943703b2c5SNicholas Bellinger * Setup default attribute lists for various fabric->tf_cit_tmpl 14953703b2c5SNicholas Bellinger */ 1496d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; 1497d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; 1498d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL; 1499d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL; 1500d80e224dSAndy Grover fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL; 15013703b2c5SNicholas Bellinger /* 15023703b2c5SNicholas Bellinger * Once fabric->tf_ops has been setup, now register the fabric for 15033703b2c5SNicholas Bellinger * use within TCM 15043703b2c5SNicholas Bellinger */ 15053703b2c5SNicholas Bellinger ret = target_fabric_configfs_register(fabric); 15063703b2c5SNicholas Bellinger if (ret < 0) { 15076708bb27SAndy Grover pr_err("target_fabric_configfs_register() for" 15083703b2c5SNicholas Bellinger " TCM_Loop failed!\n"); 15093703b2c5SNicholas Bellinger target_fabric_configfs_free(fabric); 15103703b2c5SNicholas Bellinger return -1; 15113703b2c5SNicholas Bellinger } 15123703b2c5SNicholas Bellinger /* 15133703b2c5SNicholas Bellinger * Setup our local pointer to *fabric. 15143703b2c5SNicholas Bellinger */ 15153703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = fabric; 15166708bb27SAndy Grover pr_debug("TCM_LOOP[0] - Set fabric ->" 15173703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15183703b2c5SNicholas Bellinger return 0; 15193703b2c5SNicholas Bellinger } 15203703b2c5SNicholas Bellinger 15213703b2c5SNicholas Bellinger static void tcm_loop_deregister_configfs(void) 15223703b2c5SNicholas Bellinger { 15233703b2c5SNicholas Bellinger if (!tcm_loop_fabric_configfs) 15243703b2c5SNicholas Bellinger return; 15253703b2c5SNicholas Bellinger 15263703b2c5SNicholas Bellinger target_fabric_configfs_deregister(tcm_loop_fabric_configfs); 15273703b2c5SNicholas Bellinger tcm_loop_fabric_configfs = NULL; 15286708bb27SAndy Grover pr_debug("TCM_LOOP[0] - Cleared" 15293703b2c5SNicholas Bellinger " tcm_loop_fabric_configfs\n"); 15303703b2c5SNicholas Bellinger } 15313703b2c5SNicholas Bellinger 15323703b2c5SNicholas Bellinger static int __init tcm_loop_fabric_init(void) 15333703b2c5SNicholas Bellinger { 1534afe2cb7fSChristoph Hellwig int ret = -ENOMEM; 1535afe2cb7fSChristoph Hellwig 1536afe2cb7fSChristoph Hellwig tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0); 1537afe2cb7fSChristoph Hellwig if (!tcm_loop_workqueue) 1538afe2cb7fSChristoph Hellwig goto out; 15393703b2c5SNicholas Bellinger 15403703b2c5SNicholas Bellinger tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", 15413703b2c5SNicholas Bellinger sizeof(struct tcm_loop_cmd), 15423703b2c5SNicholas Bellinger __alignof__(struct tcm_loop_cmd), 15433703b2c5SNicholas Bellinger 0, NULL); 15443703b2c5SNicholas Bellinger if (!tcm_loop_cmd_cache) { 15456708bb27SAndy Grover pr_debug("kmem_cache_create() for" 15463703b2c5SNicholas Bellinger " tcm_loop_cmd_cache failed\n"); 1547afe2cb7fSChristoph Hellwig goto out_destroy_workqueue; 15483703b2c5SNicholas Bellinger } 15493703b2c5SNicholas Bellinger 15503703b2c5SNicholas Bellinger ret = tcm_loop_alloc_core_bus(); 15513703b2c5SNicholas Bellinger if (ret) 1552afe2cb7fSChristoph Hellwig goto out_destroy_cache; 15533703b2c5SNicholas Bellinger 15543703b2c5SNicholas Bellinger ret = tcm_loop_register_configfs(); 1555afe2cb7fSChristoph Hellwig if (ret) 1556afe2cb7fSChristoph Hellwig goto out_release_core_bus; 15573703b2c5SNicholas Bellinger 15583703b2c5SNicholas Bellinger return 0; 1559afe2cb7fSChristoph Hellwig 1560afe2cb7fSChristoph Hellwig out_release_core_bus: 1561afe2cb7fSChristoph Hellwig tcm_loop_release_core_bus(); 1562afe2cb7fSChristoph Hellwig out_destroy_cache: 1563afe2cb7fSChristoph Hellwig kmem_cache_destroy(tcm_loop_cmd_cache); 1564afe2cb7fSChristoph Hellwig out_destroy_workqueue: 1565afe2cb7fSChristoph Hellwig destroy_workqueue(tcm_loop_workqueue); 1566afe2cb7fSChristoph Hellwig out: 1567afe2cb7fSChristoph Hellwig return ret; 15683703b2c5SNicholas Bellinger } 15693703b2c5SNicholas Bellinger 15703703b2c5SNicholas Bellinger static void __exit tcm_loop_fabric_exit(void) 15713703b2c5SNicholas Bellinger { 15723703b2c5SNicholas Bellinger tcm_loop_deregister_configfs(); 15733703b2c5SNicholas Bellinger tcm_loop_release_core_bus(); 15743703b2c5SNicholas Bellinger kmem_cache_destroy(tcm_loop_cmd_cache); 1575afe2cb7fSChristoph Hellwig destroy_workqueue(tcm_loop_workqueue); 15763703b2c5SNicholas Bellinger } 15773703b2c5SNicholas Bellinger 15783703b2c5SNicholas Bellinger MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); 15793703b2c5SNicholas Bellinger MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); 15803703b2c5SNicholas Bellinger MODULE_LICENSE("GPL"); 15813703b2c5SNicholas Bellinger module_init(tcm_loop_fabric_init); 15823703b2c5SNicholas Bellinger module_exit(tcm_loop_fabric_exit); 1583