Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * This file contains the Linux/SCSI LLD virtual SCSI initiator driver |
| 4 | * for emulated SAS initiator ports |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * © Copyright 2011-2013 Datera, Inc. |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 7 | * |
| 8 | * Licensed to the Linux Foundation under the General Public License (GPL) version 2. |
| 9 | * |
| 10 | * Author: Nicholas A. Bellinger <nab@risingtidesystems.com> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | ****************************************************************************/ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/moduleparam.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/configfs.h> |
| 29 | #include <scsi/scsi.h> |
| 30 | #include <scsi/scsi_tcq.h> |
| 31 | #include <scsi/scsi_host.h> |
| 32 | #include <scsi/scsi_device.h> |
| 33 | #include <scsi/scsi_cmnd.h> |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 34 | |
| 35 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 36 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 37 | |
| 38 | #include "tcm_loop.h" |
| 39 | |
| 40 | #define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev) |
| 41 | |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 42 | static struct workqueue_struct *tcm_loop_workqueue; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 43 | static struct kmem_cache *tcm_loop_cmd_cache; |
| 44 | |
| 45 | static int tcm_loop_hba_no_cnt; |
| 46 | |
Christoph Hellwig | 16786454 | 2012-02-02 17:04:42 -0500 | [diff] [blame] | 47 | static int tcm_loop_queue_status(struct se_cmd *se_cmd); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | * Called from struct target_core_fabric_ops->check_stop_free() |
| 51 | */ |
Nicholas Bellinger | 88dd9e2 | 2011-11-02 03:33:16 -0700 | [diff] [blame] | 52 | static int tcm_loop_check_stop_free(struct se_cmd *se_cmd) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 53 | { |
| 54 | /* |
| 55 | * Do not release struct se_cmd's containing a valid TMR |
| 56 | * pointer. These will be released directly in tcm_loop_device_reset() |
| 57 | * with transport_generic_free_cmd(). |
| 58 | */ |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 59 | if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Nicholas Bellinger | 88dd9e2 | 2011-11-02 03:33:16 -0700 | [diff] [blame] | 60 | return 0; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 61 | /* |
| 62 | * Release the struct se_cmd, which will make a callback to release |
| 63 | * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd() |
| 64 | */ |
Christoph Hellwig | 82f1c8a | 2011-09-13 23:09:01 +0200 | [diff] [blame] | 65 | transport_generic_free_cmd(se_cmd, 0); |
Nicholas Bellinger | 88dd9e2 | 2011-11-02 03:33:16 -0700 | [diff] [blame] | 66 | return 1; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 67 | } |
| 68 | |
Christoph Hellwig | 3546297 | 2011-05-31 23:56:57 -0400 | [diff] [blame] | 69 | static void tcm_loop_release_cmd(struct se_cmd *se_cmd) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 70 | { |
| 71 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, |
| 72 | struct tcm_loop_cmd, tl_se_cmd); |
| 73 | |
| 74 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); |
| 75 | } |
| 76 | |
Al Viro | 8946b07 | 2013-03-31 02:01:55 -0400 | [diff] [blame] | 77 | static int tcm_loop_show_info(struct seq_file *m, struct Scsi_Host *host) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 78 | { |
Al Viro | 8946b07 | 2013-03-31 02:01:55 -0400 | [diff] [blame] | 79 | seq_printf(m, "tcm_loop_proc_info()\n"); |
| 80 | return 0; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | static int tcm_loop_driver_probe(struct device *); |
| 84 | static int tcm_loop_driver_remove(struct device *); |
| 85 | |
| 86 | static int pseudo_lld_bus_match(struct device *dev, |
| 87 | struct device_driver *dev_driver) |
| 88 | { |
| 89 | return 1; |
| 90 | } |
| 91 | |
| 92 | static struct bus_type tcm_loop_lld_bus = { |
| 93 | .name = "tcm_loop_bus", |
| 94 | .match = pseudo_lld_bus_match, |
| 95 | .probe = tcm_loop_driver_probe, |
| 96 | .remove = tcm_loop_driver_remove, |
| 97 | }; |
| 98 | |
| 99 | static struct device_driver tcm_loop_driverfs = { |
| 100 | .name = "tcm_loop", |
| 101 | .bus = &tcm_loop_lld_bus, |
| 102 | }; |
| 103 | /* |
| 104 | * Used with root_device_register() in tcm_loop_alloc_core_bus() below |
| 105 | */ |
Christoph Hellwig | 6e1a27b | 2015-03-26 12:27:32 +0100 | [diff] [blame] | 106 | static struct device *tcm_loop_primary; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 107 | |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 108 | static void tcm_loop_submission_work(struct work_struct *work) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 109 | { |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 110 | struct tcm_loop_cmd *tl_cmd = |
| 111 | container_of(work, struct tcm_loop_cmd, work); |
| 112 | struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd; |
| 113 | struct scsi_cmnd *sc = tl_cmd->sc; |
| 114 | struct tcm_loop_nexus *tl_nexus; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 115 | struct tcm_loop_hba *tl_hba; |
| 116 | struct tcm_loop_tpg *tl_tpg; |
Christoph Hellwig | 16786454 | 2012-02-02 17:04:42 -0500 | [diff] [blame] | 117 | struct scatterlist *sgl_bidi = NULL; |
Sagi Grimberg | e2a4f55 | 2014-06-11 12:09:59 +0300 | [diff] [blame] | 118 | u32 sgl_bidi_count = 0, transfer_length; |
Nicholas Bellinger | 8f9f44f | 2012-10-01 23:29:49 -0700 | [diff] [blame] | 119 | int rc; |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 120 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 121 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); |
| 122 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 123 | |
Nicholas Bellinger | 0a02043 | 2011-10-10 19:44:05 -0700 | [diff] [blame] | 124 | /* |
| 125 | * Ensure that this tl_tpg reference from the incoming sc->device->id |
| 126 | * has already been configured via tcm_loop_make_naa_tpg(). |
| 127 | */ |
| 128 | if (!tl_tpg->tl_hba) { |
| 129 | set_host_byte(sc, DID_NO_CONNECT); |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 130 | goto out_done; |
Nicholas Bellinger | 0a02043 | 2011-10-10 19:44:05 -0700 | [diff] [blame] | 131 | } |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 132 | if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) { |
| 133 | set_host_byte(sc, DID_TRANSPORT_DISRUPTED); |
| 134 | goto out_done; |
| 135 | } |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 136 | tl_nexus = tl_tpg->tl_nexus; |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 137 | if (!tl_nexus) { |
| 138 | scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" |
| 139 | " does not exist\n"); |
| 140 | set_host_byte(sc, DID_ERROR); |
| 141 | goto out_done; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 142 | } |
Christoph Hellwig | 16786454 | 2012-02-02 17:04:42 -0500 | [diff] [blame] | 143 | if (scsi_bidi_cmnd(sc)) { |
| 144 | struct scsi_data_buffer *sdb = scsi_in(sc); |
| 145 | |
| 146 | sgl_bidi = sdb->table.sgl; |
| 147 | sgl_bidi_count = sdb->table.nents; |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 148 | se_cmd->se_cmd_flags |= SCF_BIDI; |
| 149 | |
Christoph Hellwig | 16786454 | 2012-02-02 17:04:42 -0500 | [diff] [blame] | 150 | } |
Sagi Grimberg | b5b8e29 | 2014-02-19 17:50:17 +0200 | [diff] [blame] | 151 | |
Sagi Grimberg | e2a4f55 | 2014-06-11 12:09:59 +0300 | [diff] [blame] | 152 | transfer_length = scsi_transfer_length(sc); |
| 153 | if (!scsi_prot_sg_count(sc) && |
| 154 | scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) { |
Sagi Grimberg | b5b8e29 | 2014-02-19 17:50:17 +0200 | [diff] [blame] | 155 | se_cmd->prot_pto = true; |
Sagi Grimberg | e2a4f55 | 2014-06-11 12:09:59 +0300 | [diff] [blame] | 156 | /* |
| 157 | * loopback transport doesn't support |
| 158 | * WRITE_GENERATE, READ_STRIP protection |
| 159 | * information operations, go ahead unprotected. |
| 160 | */ |
| 161 | transfer_length = scsi_bufflen(sc); |
| 162 | } |
Sagi Grimberg | b5b8e29 | 2014-02-19 17:50:17 +0200 | [diff] [blame] | 163 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 164 | se_cmd->tag = tl_cmd->sc_cmd_tag; |
Nicholas Bellinger | 8f9f44f | 2012-10-01 23:29:49 -0700 | [diff] [blame] | 165 | rc = target_submit_cmd_map_sgls(se_cmd, tl_nexus->se_sess, sc->cmnd, |
| 166 | &tl_cmd->tl_sense_buf[0], tl_cmd->sc->device->lun, |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 167 | transfer_length, TCM_SIMPLE_TAG, |
Nicholas Bellinger | 8f9f44f | 2012-10-01 23:29:49 -0700 | [diff] [blame] | 168 | sc->sc_data_direction, 0, |
| 169 | scsi_sglist(sc), scsi_sg_count(sc), |
Nicholas Bellinger | 59dedde | 2013-12-23 20:39:23 +0000 | [diff] [blame] | 170 | sgl_bidi, sgl_bidi_count, |
| 171 | scsi_prot_sglist(sc), scsi_prot_sg_count(sc)); |
Nicholas Bellinger | 8f9f44f | 2012-10-01 23:29:49 -0700 | [diff] [blame] | 172 | if (rc < 0) { |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 173 | set_host_byte(sc, DID_NO_CONNECT); |
| 174 | goto out_done; |
| 175 | } |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 176 | return; |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 177 | |
| 178 | out_done: |
Nicholas Bellinger | b43f188 | 2014-06-17 22:23:03 +0000 | [diff] [blame] | 179 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 180 | sc->scsi_done(sc); |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 181 | return; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * ->queuecommand can be and usually is called from interrupt context, so |
| 186 | * defer the actual submission to a workqueue. |
| 187 | */ |
| 188 | static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) |
| 189 | { |
| 190 | struct tcm_loop_cmd *tl_cmd; |
| 191 | |
Hannes Reinecke | 9cb78c1 | 2014-06-25 15:27:36 +0200 | [diff] [blame] | 192 | pr_debug("tcm_loop_queuecommand() %d:%d:%d:%llu got CDB: 0x%02x" |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 193 | " scsi_buf_len: %u\n", sc->device->host->host_no, |
| 194 | sc->device->id, sc->device->channel, sc->device->lun, |
| 195 | sc->cmnd[0], scsi_bufflen(sc)); |
| 196 | |
| 197 | tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); |
| 198 | if (!tl_cmd) { |
| 199 | pr_err("Unable to allocate struct tcm_loop_cmd\n"); |
| 200 | set_host_byte(sc, DID_ERROR); |
| 201 | sc->scsi_done(sc); |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | tl_cmd->sc = sc; |
Hannes Reinecke | 6375f89 | 2014-10-02 09:30:55 +0200 | [diff] [blame] | 206 | tl_cmd->sc_cmd_tag = sc->request->tag; |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 207 | INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); |
| 208 | queue_work(tcm_loop_workqueue, &tl_cmd->work); |
Christoph Hellwig | f872c9f | 2012-02-02 17:04:40 -0500 | [diff] [blame] | 209 | return 0; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Called from SCSI EH process context to issue a LUN_RESET TMR |
| 214 | * to struct scsi_device |
| 215 | */ |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 216 | static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, |
Hannes Reinecke | f2d3068 | 2015-06-10 08:41:22 +0200 | [diff] [blame] | 217 | u64 lun, int task, enum tcm_tmreq_table tmr) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 218 | { |
| 219 | struct se_cmd *se_cmd = NULL; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 220 | struct se_session *se_sess; |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 221 | struct se_portal_group *se_tpg; |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 222 | struct tcm_loop_nexus *tl_nexus; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 223 | struct tcm_loop_cmd *tl_cmd = NULL; |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 224 | struct tcm_loop_tmr *tl_tmr = NULL; |
| 225 | int ret = TMR_FUNCTION_FAILED, rc; |
| 226 | |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 227 | /* |
| 228 | * Locate the tl_nexus and se_sess pointers |
| 229 | */ |
| 230 | tl_nexus = tl_tpg->tl_nexus; |
| 231 | if (!tl_nexus) { |
| 232 | pr_err("Unable to perform device reset without" |
| 233 | " active I_T Nexus\n"); |
| 234 | return ret; |
| 235 | } |
| 236 | |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 237 | tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); |
| 238 | if (!tl_cmd) { |
| 239 | pr_err("Unable to allocate memory for tl_cmd\n"); |
| 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); |
| 244 | if (!tl_tmr) { |
| 245 | pr_err("Unable to allocate memory for tl_tmr\n"); |
| 246 | goto release; |
| 247 | } |
| 248 | init_waitqueue_head(&tl_tmr->tl_tmr_wait); |
| 249 | |
| 250 | se_cmd = &tl_cmd->tl_se_cmd; |
| 251 | se_tpg = &tl_tpg->tl_se_tpg; |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 252 | se_sess = tl_tpg->tl_nexus->se_sess; |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 253 | /* |
| 254 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure |
| 255 | */ |
| 256 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 257 | DMA_NONE, TCM_SIMPLE_TAG, |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 258 | &tl_cmd->tl_sense_buf[0]); |
| 259 | |
| 260 | rc = core_tmr_alloc_req(se_cmd, tl_tmr, tmr, GFP_KERNEL); |
| 261 | if (rc < 0) |
| 262 | goto release; |
| 263 | |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 264 | if (tmr == TMR_ABORT_TASK) |
| 265 | se_cmd->se_tmr_req->ref_task_tag = task; |
| 266 | |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 267 | /* |
| 268 | * Locate the underlying TCM struct se_lun |
| 269 | */ |
| 270 | if (transport_lookup_tmr_lun(se_cmd, lun) < 0) { |
| 271 | ret = TMR_LUN_DOES_NOT_EXIST; |
| 272 | goto release; |
| 273 | } |
| 274 | /* |
| 275 | * Queue the TMR to TCM Core and sleep waiting for |
| 276 | * tcm_loop_queue_tm_rsp() to wake us up. |
| 277 | */ |
| 278 | transport_generic_handle_tmr(se_cmd); |
| 279 | wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); |
| 280 | /* |
| 281 | * The TMR LUN_RESET has completed, check the response status and |
| 282 | * then release allocations. |
| 283 | */ |
| 284 | ret = se_cmd->se_tmr_req->response; |
| 285 | release: |
| 286 | if (se_cmd) |
| 287 | transport_generic_free_cmd(se_cmd, 1); |
| 288 | else |
| 289 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); |
| 290 | kfree(tl_tmr); |
| 291 | return ret; |
| 292 | } |
| 293 | |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 294 | static int tcm_loop_abort_task(struct scsi_cmnd *sc) |
| 295 | { |
| 296 | struct tcm_loop_hba *tl_hba; |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 297 | struct tcm_loop_tpg *tl_tpg; |
| 298 | int ret = FAILED; |
| 299 | |
| 300 | /* |
| 301 | * Locate the tcm_loop_hba_t pointer |
| 302 | */ |
| 303 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 304 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 305 | ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun, |
Hannes Reinecke | 6375f89 | 2014-10-02 09:30:55 +0200 | [diff] [blame] | 306 | sc->request->tag, TMR_ABORT_TASK); |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 307 | return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; |
| 308 | } |
| 309 | |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 310 | /* |
| 311 | * Called from SCSI EH process context to issue a LUN_RESET TMR |
| 312 | * to struct scsi_device |
| 313 | */ |
| 314 | static int tcm_loop_device_reset(struct scsi_cmnd *sc) |
| 315 | { |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 316 | struct tcm_loop_hba *tl_hba; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 317 | struct tcm_loop_tpg *tl_tpg; |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 318 | int ret = FAILED; |
| 319 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 320 | /* |
| 321 | * Locate the tcm_loop_hba_t pointer |
| 322 | */ |
| 323 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 324 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 325 | |
| 326 | ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun, |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 327 | 0, TMR_LUN_RESET); |
Hannes Reinecke | a314d70 | 2013-10-16 09:12:54 +0200 | [diff] [blame] | 328 | return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 329 | } |
| 330 | |
Hannes Reinecke | 8f4a1fb | 2013-10-16 09:12:56 +0200 | [diff] [blame] | 331 | static int tcm_loop_target_reset(struct scsi_cmnd *sc) |
| 332 | { |
| 333 | struct tcm_loop_hba *tl_hba; |
| 334 | struct tcm_loop_tpg *tl_tpg; |
| 335 | |
| 336 | /* |
| 337 | * Locate the tcm_loop_hba_t pointer |
| 338 | */ |
| 339 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); |
| 340 | if (!tl_hba) { |
| 341 | pr_err("Unable to perform device reset without" |
| 342 | " active I_T Nexus\n"); |
| 343 | return FAILED; |
| 344 | } |
| 345 | /* |
| 346 | * Locate the tl_tpg pointer from TargetID in sc->device->id |
| 347 | */ |
| 348 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; |
| 349 | if (tl_tpg) { |
| 350 | tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; |
| 351 | return SUCCESS; |
| 352 | } |
| 353 | return FAILED; |
| 354 | } |
| 355 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 356 | static int tcm_loop_slave_alloc(struct scsi_device *sd) |
| 357 | { |
| 358 | set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); |
| 359 | return 0; |
| 360 | } |
| 361 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 362 | static struct scsi_host_template tcm_loop_driver_template = { |
Al Viro | 8946b07 | 2013-03-31 02:01:55 -0400 | [diff] [blame] | 363 | .show_info = tcm_loop_show_info, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 364 | .proc_name = "tcm_loopback", |
| 365 | .name = "TCM_Loopback", |
| 366 | .queuecommand = tcm_loop_queuecommand, |
Christoph Hellwig | db5ed4d | 2014-11-13 15:08:42 +0100 | [diff] [blame] | 367 | .change_queue_depth = scsi_change_queue_depth, |
Hannes Reinecke | 969871c | 2013-10-16 09:12:55 +0200 | [diff] [blame] | 368 | .eh_abort_handler = tcm_loop_abort_task, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 369 | .eh_device_reset_handler = tcm_loop_device_reset, |
Hannes Reinecke | 8f4a1fb | 2013-10-16 09:12:56 +0200 | [diff] [blame] | 370 | .eh_target_reset_handler = tcm_loop_target_reset, |
Christoph Hellwig | 2e88efd | 2011-11-29 03:20:41 -0500 | [diff] [blame] | 371 | .can_queue = 1024, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 372 | .this_id = -1, |
Christoph Hellwig | 2e88efd | 2011-11-29 03:20:41 -0500 | [diff] [blame] | 373 | .sg_tablesize = 256, |
| 374 | .cmd_per_lun = 1024, |
| 375 | .max_sectors = 0xFFFF, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 376 | .use_clustering = DISABLE_CLUSTERING, |
| 377 | .slave_alloc = tcm_loop_slave_alloc, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 378 | .module = THIS_MODULE, |
Christoph Hellwig | c40ecc1 | 2014-11-13 14:25:11 +0100 | [diff] [blame] | 379 | .track_queue_depth = 1, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 380 | }; |
| 381 | |
| 382 | static int tcm_loop_driver_probe(struct device *dev) |
| 383 | { |
| 384 | struct tcm_loop_hba *tl_hba; |
| 385 | struct Scsi_Host *sh; |
Nicholas Bellinger | 59dedde | 2013-12-23 20:39:23 +0000 | [diff] [blame] | 386 | int error, host_prot; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 387 | |
| 388 | tl_hba = to_tcm_loop_hba(dev); |
| 389 | |
| 390 | sh = scsi_host_alloc(&tcm_loop_driver_template, |
| 391 | sizeof(struct tcm_loop_hba)); |
| 392 | if (!sh) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 393 | pr_err("Unable to allocate struct scsi_host\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 394 | return -ENODEV; |
| 395 | } |
| 396 | tl_hba->sh = sh; |
| 397 | |
| 398 | /* |
| 399 | * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata |
| 400 | */ |
| 401 | *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; |
| 402 | /* |
| 403 | * Setup single ID, Channel and LUN for now.. |
| 404 | */ |
| 405 | sh->max_id = 2; |
| 406 | sh->max_lun = 0; |
| 407 | sh->max_channel = 0; |
Ilias Tsitsimpis | 9736f4a | 2015-04-23 21:30:06 +0300 | [diff] [blame] | 408 | sh->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 409 | |
Nicholas Bellinger | 59dedde | 2013-12-23 20:39:23 +0000 | [diff] [blame] | 410 | host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION | |
| 411 | SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION | |
| 412 | SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION; |
| 413 | |
| 414 | scsi_host_set_prot(sh, host_prot); |
| 415 | scsi_host_set_guard(sh, SHOST_DIX_GUARD_CRC); |
| 416 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 417 | error = scsi_add_host(sh, &tl_hba->dev); |
| 418 | if (error) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 419 | pr_err("%s: scsi_add_host failed\n", __func__); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 420 | scsi_host_put(sh); |
| 421 | return -ENODEV; |
| 422 | } |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int tcm_loop_driver_remove(struct device *dev) |
| 427 | { |
| 428 | struct tcm_loop_hba *tl_hba; |
| 429 | struct Scsi_Host *sh; |
| 430 | |
| 431 | tl_hba = to_tcm_loop_hba(dev); |
| 432 | sh = tl_hba->sh; |
| 433 | |
| 434 | scsi_remove_host(sh); |
| 435 | scsi_host_put(sh); |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | static void tcm_loop_release_adapter(struct device *dev) |
| 440 | { |
| 441 | struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); |
| 442 | |
| 443 | kfree(tl_hba); |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c |
| 448 | */ |
| 449 | static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) |
| 450 | { |
| 451 | int ret; |
| 452 | |
| 453 | tl_hba->dev.bus = &tcm_loop_lld_bus; |
| 454 | tl_hba->dev.parent = tcm_loop_primary; |
| 455 | tl_hba->dev.release = &tcm_loop_release_adapter; |
| 456 | dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); |
| 457 | |
| 458 | ret = device_register(&tl_hba->dev); |
| 459 | if (ret) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 460 | pr_err("device_register() failed for" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 461 | " tl_hba->dev: %d\n", ret); |
| 462 | return -ENODEV; |
| 463 | } |
| 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | /* |
| 469 | * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated |
| 470 | * tcm_loop SCSI bus. |
| 471 | */ |
| 472 | static int tcm_loop_alloc_core_bus(void) |
| 473 | { |
| 474 | int ret; |
| 475 | |
| 476 | tcm_loop_primary = root_device_register("tcm_loop_0"); |
| 477 | if (IS_ERR(tcm_loop_primary)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 478 | pr_err("Unable to allocate tcm_loop_primary\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 479 | return PTR_ERR(tcm_loop_primary); |
| 480 | } |
| 481 | |
| 482 | ret = bus_register(&tcm_loop_lld_bus); |
| 483 | if (ret) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 484 | pr_err("bus_register() failed for tcm_loop_lld_bus\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 485 | goto dev_unreg; |
| 486 | } |
| 487 | |
| 488 | ret = driver_register(&tcm_loop_driverfs); |
| 489 | if (ret) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 490 | pr_err("driver_register() failed for" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 491 | "tcm_loop_driverfs\n"); |
| 492 | goto bus_unreg; |
| 493 | } |
| 494 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 495 | pr_debug("Initialized TCM Loop Core Bus\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 496 | return ret; |
| 497 | |
| 498 | bus_unreg: |
| 499 | bus_unregister(&tcm_loop_lld_bus); |
| 500 | dev_unreg: |
| 501 | root_device_unregister(tcm_loop_primary); |
| 502 | return ret; |
| 503 | } |
| 504 | |
| 505 | static void tcm_loop_release_core_bus(void) |
| 506 | { |
| 507 | driver_unregister(&tcm_loop_driverfs); |
| 508 | bus_unregister(&tcm_loop_lld_bus); |
| 509 | root_device_unregister(tcm_loop_primary); |
| 510 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 511 | pr_debug("Releasing TCM Loop Core BUS\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | static char *tcm_loop_get_fabric_name(void) |
| 515 | { |
| 516 | return "loopback"; |
| 517 | } |
| 518 | |
Christoph Hellwig | 1667a45 | 2015-05-01 17:47:54 +0200 | [diff] [blame] | 519 | static inline struct tcm_loop_tpg *tl_tpg(struct se_portal_group *se_tpg) |
| 520 | { |
| 521 | return container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); |
| 522 | } |
| 523 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 524 | static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) |
| 525 | { |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 526 | /* |
Hannes Reinecke | b7446ca | 2015-06-18 11:43:37 +0200 | [diff] [blame] | 527 | * Return the passed NAA identifier for the Target Port |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 528 | */ |
Christoph Hellwig | 1667a45 | 2015-05-01 17:47:54 +0200 | [diff] [blame] | 529 | return &tl_tpg(se_tpg)->tl_hba->tl_wwn_address[0]; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) |
| 533 | { |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 534 | /* |
| 535 | * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 |
| 536 | * to represent the SCSI Target Port. |
| 537 | */ |
Christoph Hellwig | 1667a45 | 2015-05-01 17:47:54 +0200 | [diff] [blame] | 538 | return tl_tpg(se_tpg)->tl_tpgt; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 541 | /* |
| 542 | * Returning (1) here allows for target_core_mod struct se_node_acl to be generated |
| 543 | * based upon the incoming fabric dependent SCSI Initiator Port |
| 544 | */ |
| 545 | static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) |
| 546 | { |
| 547 | return 1; |
| 548 | } |
| 549 | |
| 550 | static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) |
| 551 | { |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | /* |
| 556 | * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for |
| 557 | * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest |
| 558 | */ |
| 559 | static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) |
| 560 | { |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | /* |
| 565 | * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will |
| 566 | * never be called for TCM_Loop by target_core_fabric_configfs.c code. |
| 567 | * It has been added here as a nop for target_fabric_tf_ops_check() |
| 568 | */ |
| 569 | static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) |
| 570 | { |
| 571 | return 0; |
| 572 | } |
| 573 | |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 574 | static int tcm_loop_check_prot_fabric_only(struct se_portal_group *se_tpg) |
| 575 | { |
| 576 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, |
| 577 | tl_se_tpg); |
| 578 | return tl_tpg->tl_fabric_prot_type; |
| 579 | } |
| 580 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 581 | static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) |
| 582 | { |
| 583 | return 1; |
| 584 | } |
| 585 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 586 | static u32 tcm_loop_sess_get_index(struct se_session *se_sess) |
| 587 | { |
| 588 | return 1; |
| 589 | } |
| 590 | |
| 591 | static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) |
| 592 | { |
| 593 | return; |
| 594 | } |
| 595 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 596 | static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) |
| 597 | { |
| 598 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, |
| 599 | struct tcm_loop_cmd, tl_se_cmd); |
| 600 | |
| 601 | return tl_cmd->sc_cmd_state; |
| 602 | } |
| 603 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 604 | static int tcm_loop_write_pending(struct se_cmd *se_cmd) |
| 605 | { |
| 606 | /* |
| 607 | * Since Linux/SCSI has already sent down a struct scsi_cmnd |
| 608 | * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array |
| 609 | * memory, and memory has already been mapped to struct se_cmd->t_mem_list |
| 610 | * format with transport_generic_map_mem_to_cmd(). |
| 611 | * |
| 612 | * We now tell TCM to add this WRITE CDB directly into the TCM storage |
| 613 | * object execution queue. |
| 614 | */ |
Christoph Hellwig | 70baf0a | 2012-07-08 15:58:39 -0400 | [diff] [blame] | 615 | target_execute_cmd(se_cmd); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 616 | return 0; |
| 617 | } |
| 618 | |
| 619 | static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) |
| 620 | { |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) |
| 625 | { |
| 626 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, |
| 627 | struct tcm_loop_cmd, tl_se_cmd); |
| 628 | struct scsi_cmnd *sc = tl_cmd->sc; |
| 629 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 630 | pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 631 | " cdb: 0x%02x\n", sc, sc->cmnd[0]); |
| 632 | |
| 633 | sc->result = SAM_STAT_GOOD; |
| 634 | set_host_byte(sc, DID_OK); |
Roland Dreier | 6cf3fa6 | 2012-02-14 15:30:31 -0800 | [diff] [blame] | 635 | if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || |
| 636 | (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) |
| 637 | scsi_set_resid(sc, se_cmd->residual_count); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 638 | sc->scsi_done(sc); |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | static int tcm_loop_queue_status(struct se_cmd *se_cmd) |
| 643 | { |
| 644 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, |
| 645 | struct tcm_loop_cmd, tl_se_cmd); |
| 646 | struct scsi_cmnd *sc = tl_cmd->sc; |
| 647 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 648 | pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 649 | " cdb: 0x%02x\n", sc, sc->cmnd[0]); |
| 650 | |
| 651 | if (se_cmd->sense_buffer && |
| 652 | ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || |
| 653 | (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { |
| 654 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 655 | memcpy(sc->sense_buffer, se_cmd->sense_buffer, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 656 | SCSI_SENSE_BUFFERSIZE); |
| 657 | sc->result = SAM_STAT_CHECK_CONDITION; |
| 658 | set_driver_byte(sc, DRIVER_SENSE); |
| 659 | } else |
| 660 | sc->result = se_cmd->scsi_status; |
| 661 | |
| 662 | set_host_byte(sc, DID_OK); |
Roland Dreier | 6cf3fa6 | 2012-02-14 15:30:31 -0800 | [diff] [blame] | 663 | if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || |
| 664 | (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) |
| 665 | scsi_set_resid(sc, se_cmd->residual_count); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 666 | sc->scsi_done(sc); |
| 667 | return 0; |
| 668 | } |
| 669 | |
Joern Engel | b79fafa | 2013-07-03 11:22:17 -0400 | [diff] [blame] | 670 | static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 671 | { |
| 672 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; |
| 673 | struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; |
| 674 | /* |
| 675 | * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead |
| 676 | * and wake up the wait_queue_head_t in tcm_loop_device_reset() |
| 677 | */ |
| 678 | atomic_set(&tl_tmr->tmr_complete, 1); |
| 679 | wake_up(&tl_tmr->tl_tmr_wait); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 680 | } |
| 681 | |
Nicholas Bellinger | 131e6ab | 2014-03-22 14:55:56 -0700 | [diff] [blame] | 682 | static void tcm_loop_aborted_task(struct se_cmd *se_cmd) |
| 683 | { |
| 684 | return; |
| 685 | } |
| 686 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 687 | static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) |
| 688 | { |
| 689 | switch (tl_hba->tl_proto_id) { |
| 690 | case SCSI_PROTOCOL_SAS: |
| 691 | return "SAS"; |
| 692 | case SCSI_PROTOCOL_FCP: |
| 693 | return "FCP"; |
| 694 | case SCSI_PROTOCOL_ISCSI: |
| 695 | return "iSCSI"; |
| 696 | default: |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | return "Unknown"; |
| 701 | } |
| 702 | |
| 703 | /* Start items for tcm_loop_port_cit */ |
| 704 | |
| 705 | static int tcm_loop_port_link( |
| 706 | struct se_portal_group *se_tpg, |
| 707 | struct se_lun *lun) |
| 708 | { |
| 709 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 710 | struct tcm_loop_tpg, tl_se_tpg); |
| 711 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
| 712 | |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 713 | atomic_inc_mb(&tl_tpg->tl_tpg_port_count); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 714 | /* |
| 715 | * Add Linux/SCSI struct scsi_device by HCTL |
| 716 | */ |
| 717 | scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); |
| 718 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 719 | pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 720 | return 0; |
| 721 | } |
| 722 | |
| 723 | static void tcm_loop_port_unlink( |
| 724 | struct se_portal_group *se_tpg, |
| 725 | struct se_lun *se_lun) |
| 726 | { |
| 727 | struct scsi_device *sd; |
| 728 | struct tcm_loop_hba *tl_hba; |
| 729 | struct tcm_loop_tpg *tl_tpg; |
| 730 | |
| 731 | tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); |
| 732 | tl_hba = tl_tpg->tl_hba; |
| 733 | |
| 734 | sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, |
| 735 | se_lun->unpacked_lun); |
| 736 | if (!sd) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 737 | pr_err("Unable to locate struct scsi_device for %d:%d:" |
Hannes Reinecke | f2d3068 | 2015-06-10 08:41:22 +0200 | [diff] [blame] | 738 | "%llu\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 739 | return; |
| 740 | } |
| 741 | /* |
| 742 | * Remove Linux/SCSI struct scsi_device by HCTL |
| 743 | */ |
| 744 | scsi_remove_device(sd); |
| 745 | scsi_device_put(sd); |
| 746 | |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 747 | atomic_dec_mb(&tl_tpg->tl_tpg_port_count); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 748 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 749 | pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | /* End items for tcm_loop_port_cit */ |
| 753 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 754 | static ssize_t tcm_loop_tpg_attrib_fabric_prot_type_show( |
| 755 | struct config_item *item, char *page) |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 756 | { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 757 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 758 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, |
| 759 | tl_se_tpg); |
| 760 | |
| 761 | return sprintf(page, "%d\n", tl_tpg->tl_fabric_prot_type); |
| 762 | } |
| 763 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 764 | static ssize_t tcm_loop_tpg_attrib_fabric_prot_type_store( |
| 765 | struct config_item *item, const char *page, size_t count) |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 766 | { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 767 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 768 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, |
| 769 | tl_se_tpg); |
| 770 | unsigned long val; |
| 771 | int ret = kstrtoul(page, 0, &val); |
| 772 | |
| 773 | if (ret) { |
| 774 | pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret); |
| 775 | return ret; |
| 776 | } |
| 777 | if (val != 0 && val != 1 && val != 3) { |
| 778 | pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val); |
| 779 | return -EINVAL; |
| 780 | } |
| 781 | tl_tpg->tl_fabric_prot_type = val; |
| 782 | |
| 783 | return count; |
| 784 | } |
| 785 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 786 | CONFIGFS_ATTR(tcm_loop_tpg_attrib_, fabric_prot_type); |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 787 | |
| 788 | static struct configfs_attribute *tcm_loop_tpg_attrib_attrs[] = { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 789 | &tcm_loop_tpg_attrib_attr_fabric_prot_type, |
Nicholas Bellinger | 436f4a0 | 2015-02-08 12:31:39 -0800 | [diff] [blame] | 790 | NULL, |
| 791 | }; |
| 792 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 793 | /* Start items for tcm_loop_nexus_cit */ |
| 794 | |
Christoph Hellwig | fb444abe | 2016-01-09 05:30:45 -0800 | [diff] [blame] | 795 | static int tcm_loop_alloc_sess_cb(struct se_portal_group *se_tpg, |
| 796 | struct se_session *se_sess, void *p) |
| 797 | { |
| 798 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 799 | struct tcm_loop_tpg, tl_se_tpg); |
| 800 | |
| 801 | tl_tpg->tl_nexus = p; |
| 802 | return 0; |
| 803 | } |
| 804 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 805 | static int tcm_loop_make_nexus( |
| 806 | struct tcm_loop_tpg *tl_tpg, |
| 807 | const char *name) |
| 808 | { |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 809 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
| 810 | struct tcm_loop_nexus *tl_nexus; |
Christoph Hellwig | fb444abe | 2016-01-09 05:30:45 -0800 | [diff] [blame] | 811 | int ret; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 812 | |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 813 | if (tl_tpg->tl_nexus) { |
| 814 | pr_debug("tl_tpg->tl_nexus already exists\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 815 | return -EEXIST; |
| 816 | } |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 817 | |
| 818 | tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); |
| 819 | if (!tl_nexus) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 820 | pr_err("Unable to allocate struct tcm_loop_nexus\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 821 | return -ENOMEM; |
| 822 | } |
Christoph Hellwig | fb444abe | 2016-01-09 05:30:45 -0800 | [diff] [blame] | 823 | |
| 824 | tl_nexus->se_sess = target_alloc_session(&tl_tpg->tl_se_tpg, 0, 0, |
| 825 | TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS, |
| 826 | name, tl_nexus, tcm_loop_alloc_sess_cb); |
Dan Carpenter | 552523d | 2011-06-15 09:41:33 -0700 | [diff] [blame] | 827 | if (IS_ERR(tl_nexus->se_sess)) { |
| 828 | ret = PTR_ERR(tl_nexus->se_sess); |
Christoph Hellwig | fb444abe | 2016-01-09 05:30:45 -0800 | [diff] [blame] | 829 | kfree(tl_nexus); |
| 830 | return ret; |
Dan Carpenter | 552523d | 2011-06-15 09:41:33 -0700 | [diff] [blame] | 831 | } |
Christoph Hellwig | fb444abe | 2016-01-09 05:30:45 -0800 | [diff] [blame] | 832 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 833 | pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 834 | " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), |
| 835 | name); |
| 836 | return 0; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | static int tcm_loop_drop_nexus( |
| 840 | struct tcm_loop_tpg *tpg) |
| 841 | { |
| 842 | struct se_session *se_sess; |
| 843 | struct tcm_loop_nexus *tl_nexus; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 844 | |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 845 | tl_nexus = tpg->tl_nexus; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 846 | if (!tl_nexus) |
| 847 | return -ENODEV; |
| 848 | |
| 849 | se_sess = tl_nexus->se_sess; |
| 850 | if (!se_sess) |
| 851 | return -ENODEV; |
| 852 | |
| 853 | if (atomic_read(&tpg->tl_tpg_port_count)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 854 | pr_err("Unable to remove TCM_Loop I_T Nexus with" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 855 | " active TPG port count: %d\n", |
| 856 | atomic_read(&tpg->tl_tpg_port_count)); |
| 857 | return -EPERM; |
| 858 | } |
| 859 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 860 | pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 861 | " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tpg->tl_hba), |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 862 | tl_nexus->se_sess->se_node_acl->initiatorname); |
| 863 | /* |
Hannes Reinecke | b7446ca | 2015-06-18 11:43:37 +0200 | [diff] [blame] | 864 | * Release the SCSI I_T Nexus to the emulated Target Port |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 865 | */ |
| 866 | transport_deregister_session(tl_nexus->se_sess); |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 867 | tpg->tl_nexus = NULL; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 868 | kfree(tl_nexus); |
| 869 | return 0; |
| 870 | } |
| 871 | |
| 872 | /* End items for tcm_loop_nexus_cit */ |
| 873 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 874 | static ssize_t tcm_loop_tpg_nexus_show(struct config_item *item, char *page) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 875 | { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 876 | struct se_portal_group *se_tpg = to_tpg(item); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 877 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 878 | struct tcm_loop_tpg, tl_se_tpg); |
| 879 | struct tcm_loop_nexus *tl_nexus; |
| 880 | ssize_t ret; |
| 881 | |
Hannes Reinecke | 506787a | 2014-11-26 14:58:57 +0100 | [diff] [blame] | 882 | tl_nexus = tl_tpg->tl_nexus; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 883 | if (!tl_nexus) |
| 884 | return -ENODEV; |
| 885 | |
| 886 | ret = snprintf(page, PAGE_SIZE, "%s\n", |
| 887 | tl_nexus->se_sess->se_node_acl->initiatorname); |
| 888 | |
| 889 | return ret; |
| 890 | } |
| 891 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 892 | static ssize_t tcm_loop_tpg_nexus_store(struct config_item *item, |
| 893 | const char *page, size_t count) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 894 | { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 895 | struct se_portal_group *se_tpg = to_tpg(item); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 896 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 897 | struct tcm_loop_tpg, tl_se_tpg); |
| 898 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
| 899 | unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; |
| 900 | int ret; |
| 901 | /* |
| 902 | * Shutdown the active I_T nexus if 'NULL' is passed.. |
| 903 | */ |
| 904 | if (!strncmp(page, "NULL", 4)) { |
| 905 | ret = tcm_loop_drop_nexus(tl_tpg); |
| 906 | return (!ret) ? count : ret; |
| 907 | } |
| 908 | /* |
| 909 | * Otherwise make sure the passed virtual Initiator port WWN matches |
| 910 | * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call |
| 911 | * tcm_loop_make_nexus() |
| 912 | */ |
Dan Carpenter | 60d645a | 2011-06-15 10:03:05 -0700 | [diff] [blame] | 913 | if (strlen(page) >= TL_WWN_ADDR_LEN) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 914 | pr_err("Emulated NAA Sas Address: %s, exceeds" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 915 | " max: %d\n", page, TL_WWN_ADDR_LEN); |
| 916 | return -EINVAL; |
| 917 | } |
| 918 | snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); |
| 919 | |
| 920 | ptr = strstr(i_port, "naa."); |
| 921 | if (ptr) { |
| 922 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 923 | pr_err("Passed SAS Initiator Port %s does not" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 924 | " match target port protoid: %s\n", i_port, |
| 925 | tcm_loop_dump_proto_id(tl_hba)); |
| 926 | return -EINVAL; |
| 927 | } |
| 928 | port_ptr = &i_port[0]; |
| 929 | goto check_newline; |
| 930 | } |
| 931 | ptr = strstr(i_port, "fc."); |
| 932 | if (ptr) { |
| 933 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 934 | pr_err("Passed FCP Initiator Port %s does not" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 935 | " match target port protoid: %s\n", i_port, |
| 936 | tcm_loop_dump_proto_id(tl_hba)); |
| 937 | return -EINVAL; |
| 938 | } |
| 939 | port_ptr = &i_port[3]; /* Skip over "fc." */ |
| 940 | goto check_newline; |
| 941 | } |
| 942 | ptr = strstr(i_port, "iqn."); |
| 943 | if (ptr) { |
| 944 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 945 | pr_err("Passed iSCSI Initiator Port %s does not" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 946 | " match target port protoid: %s\n", i_port, |
| 947 | tcm_loop_dump_proto_id(tl_hba)); |
| 948 | return -EINVAL; |
| 949 | } |
| 950 | port_ptr = &i_port[0]; |
| 951 | goto check_newline; |
| 952 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 953 | pr_err("Unable to locate prefix for emulated Initiator Port:" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 954 | " %s\n", i_port); |
| 955 | return -EINVAL; |
| 956 | /* |
| 957 | * Clear any trailing newline for the NAA WWN |
| 958 | */ |
| 959 | check_newline: |
| 960 | if (i_port[strlen(i_port)-1] == '\n') |
| 961 | i_port[strlen(i_port)-1] = '\0'; |
| 962 | |
| 963 | ret = tcm_loop_make_nexus(tl_tpg, port_ptr); |
| 964 | if (ret < 0) |
| 965 | return ret; |
| 966 | |
| 967 | return count; |
| 968 | } |
| 969 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 970 | static ssize_t tcm_loop_tpg_transport_status_show(struct config_item *item, |
| 971 | char *page) |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 972 | { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 973 | struct se_portal_group *se_tpg = to_tpg(item); |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 974 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 975 | struct tcm_loop_tpg, tl_se_tpg); |
| 976 | const char *status = NULL; |
| 977 | ssize_t ret = -EINVAL; |
| 978 | |
| 979 | switch (tl_tpg->tl_transport_status) { |
| 980 | case TCM_TRANSPORT_ONLINE: |
| 981 | status = "online"; |
| 982 | break; |
| 983 | case TCM_TRANSPORT_OFFLINE: |
| 984 | status = "offline"; |
| 985 | break; |
| 986 | default: |
| 987 | break; |
| 988 | } |
| 989 | |
| 990 | if (status) |
| 991 | ret = snprintf(page, PAGE_SIZE, "%s\n", status); |
| 992 | |
| 993 | return ret; |
| 994 | } |
| 995 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 996 | static ssize_t tcm_loop_tpg_transport_status_store(struct config_item *item, |
| 997 | const char *page, size_t count) |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 998 | { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 999 | struct se_portal_group *se_tpg = to_tpg(item); |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 1000 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 1001 | struct tcm_loop_tpg, tl_se_tpg); |
| 1002 | |
| 1003 | if (!strncmp(page, "online", 6)) { |
| 1004 | tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; |
| 1005 | return count; |
| 1006 | } |
| 1007 | if (!strncmp(page, "offline", 7)) { |
| 1008 | tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE; |
Hannes Reinecke | e986a35 | 2015-06-18 11:43:38 +0200 | [diff] [blame] | 1009 | if (tl_tpg->tl_nexus) { |
| 1010 | struct se_session *tl_sess = tl_tpg->tl_nexus->se_sess; |
| 1011 | |
| 1012 | core_allocate_nexus_loss_ua(tl_sess->se_node_acl); |
| 1013 | } |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 1014 | return count; |
| 1015 | } |
| 1016 | return -EINVAL; |
| 1017 | } |
| 1018 | |
Sheng Yang | 2628b35 | 2015-11-14 14:17:16 -0800 | [diff] [blame] | 1019 | static ssize_t tcm_loop_tpg_address_show(struct config_item *item, |
| 1020 | char *page) |
| 1021 | { |
| 1022 | struct se_portal_group *se_tpg = to_tpg(item); |
| 1023 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 1024 | struct tcm_loop_tpg, tl_se_tpg); |
| 1025 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
| 1026 | |
| 1027 | return snprintf(page, PAGE_SIZE, "%d:0:%d\n", |
| 1028 | tl_hba->sh->host_no, tl_tpg->tl_tpgt); |
| 1029 | } |
| 1030 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 1031 | CONFIGFS_ATTR(tcm_loop_tpg_, nexus); |
| 1032 | CONFIGFS_ATTR(tcm_loop_tpg_, transport_status); |
Sheng Yang | 2628b35 | 2015-11-14 14:17:16 -0800 | [diff] [blame] | 1033 | CONFIGFS_ATTR_RO(tcm_loop_tpg_, address); |
Hannes Reinecke | fb2b284 | 2013-10-16 09:12:53 +0200 | [diff] [blame] | 1034 | |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1035 | static struct configfs_attribute *tcm_loop_tpg_attrs[] = { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 1036 | &tcm_loop_tpg_attr_nexus, |
| 1037 | &tcm_loop_tpg_attr_transport_status, |
Sheng Yang | 2628b35 | 2015-11-14 14:17:16 -0800 | [diff] [blame] | 1038 | &tcm_loop_tpg_attr_address, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1039 | NULL, |
| 1040 | }; |
| 1041 | |
| 1042 | /* Start items for tcm_loop_naa_cit */ |
| 1043 | |
Rashika Kheria | f0a6c69 | 2013-12-19 00:02:54 +0530 | [diff] [blame] | 1044 | static struct se_portal_group *tcm_loop_make_naa_tpg( |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1045 | struct se_wwn *wwn, |
| 1046 | struct config_group *group, |
| 1047 | const char *name) |
| 1048 | { |
| 1049 | struct tcm_loop_hba *tl_hba = container_of(wwn, |
| 1050 | struct tcm_loop_hba, tl_hba_wwn); |
| 1051 | struct tcm_loop_tpg *tl_tpg; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1052 | int ret; |
Ming Lin | 2e1cd90 | 2015-03-29 23:11:30 -0700 | [diff] [blame] | 1053 | unsigned long tpgt; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1054 | |
Ming Lin | 2e1cd90 | 2015-03-29 23:11:30 -0700 | [diff] [blame] | 1055 | if (strstr(name, "tpgt_") != name) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1056 | pr_err("Unable to locate \"tpgt_#\" directory" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1057 | " group\n"); |
| 1058 | return ERR_PTR(-EINVAL); |
| 1059 | } |
Ming Lin | 2e1cd90 | 2015-03-29 23:11:30 -0700 | [diff] [blame] | 1060 | if (kstrtoul(name+5, 10, &tpgt)) |
| 1061 | return ERR_PTR(-EINVAL); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1062 | |
Dan Carpenter | 12f09cc | 2011-04-02 14:32:47 -0700 | [diff] [blame] | 1063 | if (tpgt >= TL_TPGS_PER_HBA) { |
Ming Lin | 2e1cd90 | 2015-03-29 23:11:30 -0700 | [diff] [blame] | 1064 | pr_err("Passed tpgt: %lu exceeds TL_TPGS_PER_HBA:" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1065 | " %u\n", tpgt, TL_TPGS_PER_HBA); |
| 1066 | return ERR_PTR(-EINVAL); |
| 1067 | } |
| 1068 | tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; |
| 1069 | tl_tpg->tl_hba = tl_hba; |
| 1070 | tl_tpg->tl_tpgt = tpgt; |
| 1071 | /* |
Hannes Reinecke | b7446ca | 2015-06-18 11:43:37 +0200 | [diff] [blame] | 1072 | * Register the tl_tpg as a emulated TCM Target Endpoint |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1073 | */ |
Nicholas Bellinger | bc0c94b | 2015-05-20 21:48:03 -0700 | [diff] [blame] | 1074 | ret = core_tpg_register(wwn, &tl_tpg->tl_se_tpg, tl_hba->tl_proto_id); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1075 | if (ret < 0) |
| 1076 | return ERR_PTR(-ENOMEM); |
| 1077 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1078 | pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" |
Ming Lin | 2e1cd90 | 2015-03-29 23:11:30 -0700 | [diff] [blame] | 1079 | " Target Port %s,t,0x%04lx\n", tcm_loop_dump_proto_id(tl_hba), |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1080 | config_item_name(&wwn->wwn_group.cg_item), tpgt); |
| 1081 | |
| 1082 | return &tl_tpg->tl_se_tpg; |
| 1083 | } |
| 1084 | |
Rashika Kheria | f0a6c69 | 2013-12-19 00:02:54 +0530 | [diff] [blame] | 1085 | static void tcm_loop_drop_naa_tpg( |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1086 | struct se_portal_group *se_tpg) |
| 1087 | { |
| 1088 | struct se_wwn *wwn = se_tpg->se_tpg_wwn; |
| 1089 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, |
| 1090 | struct tcm_loop_tpg, tl_se_tpg); |
| 1091 | struct tcm_loop_hba *tl_hba; |
| 1092 | unsigned short tpgt; |
| 1093 | |
| 1094 | tl_hba = tl_tpg->tl_hba; |
| 1095 | tpgt = tl_tpg->tl_tpgt; |
| 1096 | /* |
Hannes Reinecke | b7446ca | 2015-06-18 11:43:37 +0200 | [diff] [blame] | 1097 | * Release the I_T Nexus for the Virtual target link if present |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1098 | */ |
| 1099 | tcm_loop_drop_nexus(tl_tpg); |
| 1100 | /* |
Hannes Reinecke | b7446ca | 2015-06-18 11:43:37 +0200 | [diff] [blame] | 1101 | * Deregister the tl_tpg as a emulated TCM Target Endpoint |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1102 | */ |
| 1103 | core_tpg_deregister(se_tpg); |
| 1104 | |
Nicholas Bellinger | 0a02043 | 2011-10-10 19:44:05 -0700 | [diff] [blame] | 1105 | tl_tpg->tl_hba = NULL; |
| 1106 | tl_tpg->tl_tpgt = 0; |
| 1107 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1108 | pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1109 | " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), |
| 1110 | config_item_name(&wwn->wwn_group.cg_item), tpgt); |
| 1111 | } |
| 1112 | |
| 1113 | /* End items for tcm_loop_naa_cit */ |
| 1114 | |
| 1115 | /* Start items for tcm_loop_cit */ |
| 1116 | |
Rashika Kheria | f0a6c69 | 2013-12-19 00:02:54 +0530 | [diff] [blame] | 1117 | static struct se_wwn *tcm_loop_make_scsi_hba( |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1118 | struct target_fabric_configfs *tf, |
| 1119 | struct config_group *group, |
| 1120 | const char *name) |
| 1121 | { |
| 1122 | struct tcm_loop_hba *tl_hba; |
| 1123 | struct Scsi_Host *sh; |
| 1124 | char *ptr; |
| 1125 | int ret, off = 0; |
| 1126 | |
| 1127 | tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); |
| 1128 | if (!tl_hba) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1129 | pr_err("Unable to allocate struct tcm_loop_hba\n"); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1130 | return ERR_PTR(-ENOMEM); |
| 1131 | } |
| 1132 | /* |
| 1133 | * Determine the emulated Protocol Identifier and Target Port Name |
| 1134 | * based on the incoming configfs directory name. |
| 1135 | */ |
| 1136 | ptr = strstr(name, "naa."); |
| 1137 | if (ptr) { |
| 1138 | tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; |
| 1139 | goto check_len; |
| 1140 | } |
| 1141 | ptr = strstr(name, "fc."); |
| 1142 | if (ptr) { |
| 1143 | tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; |
| 1144 | off = 3; /* Skip over "fc." */ |
| 1145 | goto check_len; |
| 1146 | } |
| 1147 | ptr = strstr(name, "iqn."); |
Jesper Juhl | a57b5d3 | 2011-06-28 00:30:17 +0200 | [diff] [blame] | 1148 | if (!ptr) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1149 | pr_err("Unable to locate prefix for emulated Target " |
Jesper Juhl | a57b5d3 | 2011-06-28 00:30:17 +0200 | [diff] [blame] | 1150 | "Port: %s\n", name); |
| 1151 | ret = -EINVAL; |
| 1152 | goto out; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1153 | } |
Jesper Juhl | a57b5d3 | 2011-06-28 00:30:17 +0200 | [diff] [blame] | 1154 | tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1155 | |
| 1156 | check_len: |
Dan Carpenter | 60d645a | 2011-06-15 10:03:05 -0700 | [diff] [blame] | 1157 | if (strlen(name) >= TL_WWN_ADDR_LEN) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1158 | pr_err("Emulated NAA %s Address: %s, exceeds" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1159 | " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), |
| 1160 | TL_WWN_ADDR_LEN); |
Jesper Juhl | a57b5d3 | 2011-06-28 00:30:17 +0200 | [diff] [blame] | 1161 | ret = -EINVAL; |
| 1162 | goto out; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1163 | } |
| 1164 | snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); |
| 1165 | |
| 1166 | /* |
| 1167 | * Call device_register(tl_hba->dev) to register the emulated |
| 1168 | * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after |
| 1169 | * device_register() callbacks in tcm_loop_driver_probe() |
| 1170 | */ |
| 1171 | ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); |
| 1172 | if (ret) |
| 1173 | goto out; |
| 1174 | |
| 1175 | sh = tl_hba->sh; |
| 1176 | tcm_loop_hba_no_cnt++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1177 | pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1178 | " %s Address: %s at Linux/SCSI Host ID: %d\n", |
| 1179 | tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); |
| 1180 | |
| 1181 | return &tl_hba->tl_hba_wwn; |
| 1182 | out: |
| 1183 | kfree(tl_hba); |
| 1184 | return ERR_PTR(ret); |
| 1185 | } |
| 1186 | |
Rashika Kheria | f0a6c69 | 2013-12-19 00:02:54 +0530 | [diff] [blame] | 1187 | static void tcm_loop_drop_scsi_hba( |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1188 | struct se_wwn *wwn) |
| 1189 | { |
| 1190 | struct tcm_loop_hba *tl_hba = container_of(wwn, |
| 1191 | struct tcm_loop_hba, tl_hba_wwn); |
Nicholas Bellinger | 6297b07 | 2011-11-12 09:29:51 -0800 | [diff] [blame] | 1192 | |
| 1193 | pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target" |
Hannes Reinecke | b7446ca | 2015-06-18 11:43:37 +0200 | [diff] [blame] | 1194 | " %s Address: %s at Linux/SCSI Host ID: %d\n", |
| 1195 | tcm_loop_dump_proto_id(tl_hba), tl_hba->tl_wwn_address, |
| 1196 | tl_hba->sh->host_no); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1197 | /* |
| 1198 | * Call device_unregister() on the original tl_hba->dev. |
| 1199 | * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will |
| 1200 | * release *tl_hba; |
| 1201 | */ |
| 1202 | device_unregister(&tl_hba->dev); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1203 | } |
| 1204 | |
| 1205 | /* Start items for tcm_loop_cit */ |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 1206 | static ssize_t tcm_loop_wwn_version_show(struct config_item *item, char *page) |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1207 | { |
| 1208 | return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); |
| 1209 | } |
| 1210 | |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 1211 | CONFIGFS_ATTR_RO(tcm_loop_wwn_, version); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1212 | |
| 1213 | static struct configfs_attribute *tcm_loop_wwn_attrs[] = { |
Christoph Hellwig | 2eafd72 | 2015-10-03 15:32:55 +0200 | [diff] [blame] | 1214 | &tcm_loop_wwn_attr_version, |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1215 | NULL, |
| 1216 | }; |
| 1217 | |
| 1218 | /* End items for tcm_loop_cit */ |
| 1219 | |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1220 | static const struct target_core_fabric_ops loop_ops = { |
| 1221 | .module = THIS_MODULE, |
| 1222 | .name = "loopback", |
| 1223 | .get_fabric_name = tcm_loop_get_fabric_name, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1224 | .tpg_get_wwn = tcm_loop_get_endpoint_wwn, |
| 1225 | .tpg_get_tag = tcm_loop_get_tag, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1226 | .tpg_check_demo_mode = tcm_loop_check_demo_mode, |
| 1227 | .tpg_check_demo_mode_cache = tcm_loop_check_demo_mode_cache, |
| 1228 | .tpg_check_demo_mode_write_protect = |
| 1229 | tcm_loop_check_demo_mode_write_protect, |
| 1230 | .tpg_check_prod_mode_write_protect = |
| 1231 | tcm_loop_check_prod_mode_write_protect, |
| 1232 | .tpg_check_prot_fabric_only = tcm_loop_check_prot_fabric_only, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1233 | .tpg_get_inst_index = tcm_loop_get_inst_index, |
| 1234 | .check_stop_free = tcm_loop_check_stop_free, |
| 1235 | .release_cmd = tcm_loop_release_cmd, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1236 | .sess_get_index = tcm_loop_sess_get_index, |
| 1237 | .write_pending = tcm_loop_write_pending, |
| 1238 | .write_pending_status = tcm_loop_write_pending_status, |
| 1239 | .set_default_node_attributes = tcm_loop_set_default_node_attributes, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1240 | .get_cmd_state = tcm_loop_get_cmd_state, |
| 1241 | .queue_data_in = tcm_loop_queue_data_in, |
| 1242 | .queue_status = tcm_loop_queue_status, |
| 1243 | .queue_tm_rsp = tcm_loop_queue_tm_rsp, |
| 1244 | .aborted_task = tcm_loop_aborted_task, |
| 1245 | .fabric_make_wwn = tcm_loop_make_scsi_hba, |
| 1246 | .fabric_drop_wwn = tcm_loop_drop_scsi_hba, |
| 1247 | .fabric_make_tpg = tcm_loop_make_naa_tpg, |
| 1248 | .fabric_drop_tpg = tcm_loop_drop_naa_tpg, |
| 1249 | .fabric_post_link = tcm_loop_port_link, |
| 1250 | .fabric_pre_unlink = tcm_loop_port_unlink, |
| 1251 | .tfc_wwn_attrs = tcm_loop_wwn_attrs, |
| 1252 | .tfc_tpg_base_attrs = tcm_loop_tpg_attrs, |
| 1253 | .tfc_tpg_attrib_attrs = tcm_loop_tpg_attrib_attrs, |
| 1254 | }; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1255 | |
| 1256 | static int __init tcm_loop_fabric_init(void) |
| 1257 | { |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 1258 | int ret = -ENOMEM; |
| 1259 | |
| 1260 | tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0); |
| 1261 | if (!tcm_loop_workqueue) |
| 1262 | goto out; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1263 | |
| 1264 | tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", |
| 1265 | sizeof(struct tcm_loop_cmd), |
| 1266 | __alignof__(struct tcm_loop_cmd), |
| 1267 | 0, NULL); |
| 1268 | if (!tcm_loop_cmd_cache) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1269 | pr_debug("kmem_cache_create() for" |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1270 | " tcm_loop_cmd_cache failed\n"); |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 1271 | goto out_destroy_workqueue; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1272 | } |
| 1273 | |
| 1274 | ret = tcm_loop_alloc_core_bus(); |
| 1275 | if (ret) |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 1276 | goto out_destroy_cache; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1277 | |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1278 | ret = target_register_template(&loop_ops); |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 1279 | if (ret) |
| 1280 | goto out_release_core_bus; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1281 | |
| 1282 | return 0; |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 1283 | |
| 1284 | out_release_core_bus: |
| 1285 | tcm_loop_release_core_bus(); |
| 1286 | out_destroy_cache: |
| 1287 | kmem_cache_destroy(tcm_loop_cmd_cache); |
| 1288 | out_destroy_workqueue: |
| 1289 | destroy_workqueue(tcm_loop_workqueue); |
| 1290 | out: |
| 1291 | return ret; |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1292 | } |
| 1293 | |
| 1294 | static void __exit tcm_loop_fabric_exit(void) |
| 1295 | { |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1296 | target_unregister_template(&loop_ops); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1297 | tcm_loop_release_core_bus(); |
| 1298 | kmem_cache_destroy(tcm_loop_cmd_cache); |
Christoph Hellwig | afe2cb7 | 2012-02-02 17:04:41 -0500 | [diff] [blame] | 1299 | destroy_workqueue(tcm_loop_workqueue); |
Nicholas Bellinger | 3703b2c | 2011-03-18 15:39:17 -0700 | [diff] [blame] | 1300 | } |
| 1301 | |
| 1302 | MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); |
| 1303 | MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); |
| 1304 | MODULE_LICENSE("GPL"); |
| 1305 | module_init(tcm_loop_fabric_init); |
| 1306 | module_exit(tcm_loop_fabric_exit); |