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3703b2c5 NB |
1 | /******************************************************************************* |
2 | * | |
3 | * This file contains the Linux/SCSI LLD virtual SCSI initiator driver | |
4 | * for emulated SAS initiator ports | |
5 | * | |
4c76251e | 6 | * © Copyright 2011-2013 Datera, Inc. |
3703b2c5 NB |
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> | |
3703b2c5 NB |
34 | |
35 | #include <target/target_core_base.h> | |
c4795fb2 | 36 | #include <target/target_core_fabric.h> |
3703b2c5 | 37 | #include <target/target_core_fabric_configfs.h> |
3703b2c5 | 38 | #include <target/target_core_configfs.h> |
3703b2c5 NB |
39 | |
40 | #include "tcm_loop.h" | |
41 | ||
42 | #define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev) | |
43 | ||
44 | /* Local pointer to allocated TCM configfs fabric module */ | |
45 | static struct target_fabric_configfs *tcm_loop_fabric_configfs; | |
46 | ||
afe2cb7f | 47 | static struct workqueue_struct *tcm_loop_workqueue; |
3703b2c5 NB |
48 | static struct kmem_cache *tcm_loop_cmd_cache; |
49 | ||
50 | static int tcm_loop_hba_no_cnt; | |
51 | ||
16786454 | 52 | static int tcm_loop_queue_status(struct se_cmd *se_cmd); |
3703b2c5 NB |
53 | |
54 | /* | |
55 | * Called from struct target_core_fabric_ops->check_stop_free() | |
56 | */ | |
88dd9e26 | 57 | static int tcm_loop_check_stop_free(struct se_cmd *se_cmd) |
3703b2c5 NB |
58 | { |
59 | /* | |
60 | * Do not release struct se_cmd's containing a valid TMR | |
61 | * pointer. These will be released directly in tcm_loop_device_reset() | |
62 | * with transport_generic_free_cmd(). | |
63 | */ | |
c8e31f26 | 64 | if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
88dd9e26 | 65 | return 0; |
3703b2c5 NB |
66 | /* |
67 | * Release the struct se_cmd, which will make a callback to release | |
68 | * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd() | |
69 | */ | |
82f1c8a4 | 70 | transport_generic_free_cmd(se_cmd, 0); |
88dd9e26 | 71 | return 1; |
3703b2c5 NB |
72 | } |
73 | ||
35462975 | 74 | static void tcm_loop_release_cmd(struct se_cmd *se_cmd) |
3703b2c5 NB |
75 | { |
76 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
77 | struct tcm_loop_cmd, tl_se_cmd); | |
78 | ||
79 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); | |
80 | } | |
81 | ||
8946b077 | 82 | static int tcm_loop_show_info(struct seq_file *m, struct Scsi_Host *host) |
3703b2c5 | 83 | { |
8946b077 AV |
84 | seq_printf(m, "tcm_loop_proc_info()\n"); |
85 | return 0; | |
3703b2c5 NB |
86 | } |
87 | ||
88 | static int tcm_loop_driver_probe(struct device *); | |
89 | static int tcm_loop_driver_remove(struct device *); | |
90 | ||
91 | static int pseudo_lld_bus_match(struct device *dev, | |
92 | struct device_driver *dev_driver) | |
93 | { | |
94 | return 1; | |
95 | } | |
96 | ||
97 | static struct bus_type tcm_loop_lld_bus = { | |
98 | .name = "tcm_loop_bus", | |
99 | .match = pseudo_lld_bus_match, | |
100 | .probe = tcm_loop_driver_probe, | |
101 | .remove = tcm_loop_driver_remove, | |
102 | }; | |
103 | ||
104 | static struct device_driver tcm_loop_driverfs = { | |
105 | .name = "tcm_loop", | |
106 | .bus = &tcm_loop_lld_bus, | |
107 | }; | |
108 | /* | |
109 | * Used with root_device_register() in tcm_loop_alloc_core_bus() below | |
110 | */ | |
111 | struct device *tcm_loop_primary; | |
112 | ||
113 | /* | |
114 | * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and | |
115 | * drivers/scsi/libiscsi.c:iscsi_change_queue_depth() | |
116 | */ | |
117 | static int tcm_loop_change_queue_depth( | |
118 | struct scsi_device *sdev, | |
119 | int depth, | |
120 | int reason) | |
121 | { | |
122 | switch (reason) { | |
123 | case SCSI_QDEPTH_DEFAULT: | |
124 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
125 | break; | |
126 | case SCSI_QDEPTH_QFULL: | |
127 | scsi_track_queue_full(sdev, depth); | |
128 | break; | |
129 | case SCSI_QDEPTH_RAMP_UP: | |
130 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); | |
131 | break; | |
132 | default: | |
133 | return -EOPNOTSUPP; | |
134 | } | |
135 | return sdev->queue_depth; | |
136 | } | |
137 | ||
969871cd HR |
138 | static int tcm_loop_change_queue_type(struct scsi_device *sdev, int tag) |
139 | { | |
140 | if (sdev->tagged_supported) { | |
141 | scsi_set_tag_type(sdev, tag); | |
142 | ||
143 | if (tag) | |
144 | scsi_activate_tcq(sdev, sdev->queue_depth); | |
145 | else | |
146 | scsi_deactivate_tcq(sdev, sdev->queue_depth); | |
147 | } else | |
148 | tag = 0; | |
149 | ||
150 | return tag; | |
151 | } | |
152 | ||
f872c9f4 CH |
153 | /* |
154 | * Locate the SAM Task Attr from struct scsi_cmnd * | |
155 | */ | |
156 | static int tcm_loop_sam_attr(struct scsi_cmnd *sc) | |
157 | { | |
158 | if (sc->device->tagged_supported) { | |
159 | switch (sc->tag) { | |
160 | case HEAD_OF_QUEUE_TAG: | |
161 | return MSG_HEAD_TAG; | |
162 | case ORDERED_QUEUE_TAG: | |
163 | return MSG_ORDERED_TAG; | |
164 | default: | |
165 | break; | |
166 | } | |
167 | } | |
168 | ||
169 | return MSG_SIMPLE_TAG; | |
170 | } | |
171 | ||
afe2cb7f | 172 | static void tcm_loop_submission_work(struct work_struct *work) |
3703b2c5 | 173 | { |
afe2cb7f CH |
174 | struct tcm_loop_cmd *tl_cmd = |
175 | container_of(work, struct tcm_loop_cmd, work); | |
176 | struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd; | |
177 | struct scsi_cmnd *sc = tl_cmd->sc; | |
178 | struct tcm_loop_nexus *tl_nexus; | |
3703b2c5 NB |
179 | struct tcm_loop_hba *tl_hba; |
180 | struct tcm_loop_tpg *tl_tpg; | |
16786454 | 181 | struct scatterlist *sgl_bidi = NULL; |
e2a4f55c | 182 | u32 sgl_bidi_count = 0, transfer_length; |
8f9f44f8 | 183 | int rc; |
3703b2c5 | 184 | |
3703b2c5 NB |
185 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); |
186 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; | |
afe2cb7f | 187 | |
0a020436 NB |
188 | /* |
189 | * Ensure that this tl_tpg reference from the incoming sc->device->id | |
190 | * has already been configured via tcm_loop_make_naa_tpg(). | |
191 | */ | |
192 | if (!tl_tpg->tl_hba) { | |
193 | set_host_byte(sc, DID_NO_CONNECT); | |
f872c9f4 | 194 | goto out_done; |
0a020436 | 195 | } |
fb2b2844 HR |
196 | if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) { |
197 | set_host_byte(sc, DID_TRANSPORT_DISRUPTED); | |
198 | goto out_done; | |
199 | } | |
f872c9f4 CH |
200 | tl_nexus = tl_hba->tl_nexus; |
201 | if (!tl_nexus) { | |
202 | scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" | |
203 | " does not exist\n"); | |
204 | set_host_byte(sc, DID_ERROR); | |
205 | goto out_done; | |
3703b2c5 | 206 | } |
16786454 CH |
207 | if (scsi_bidi_cmnd(sc)) { |
208 | struct scsi_data_buffer *sdb = scsi_in(sc); | |
209 | ||
210 | sgl_bidi = sdb->table.sgl; | |
211 | sgl_bidi_count = sdb->table.nents; | |
f872c9f4 CH |
212 | se_cmd->se_cmd_flags |= SCF_BIDI; |
213 | ||
16786454 | 214 | } |
b5b8e298 | 215 | |
e2a4f55c SG |
216 | transfer_length = scsi_transfer_length(sc); |
217 | if (!scsi_prot_sg_count(sc) && | |
218 | scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) { | |
b5b8e298 | 219 | se_cmd->prot_pto = true; |
e2a4f55c SG |
220 | /* |
221 | * loopback transport doesn't support | |
222 | * WRITE_GENERATE, READ_STRIP protection | |
223 | * information operations, go ahead unprotected. | |
224 | */ | |
225 | transfer_length = scsi_bufflen(sc); | |
226 | } | |
b5b8e298 | 227 | |
8f9f44f8 NB |
228 | rc = target_submit_cmd_map_sgls(se_cmd, tl_nexus->se_sess, sc->cmnd, |
229 | &tl_cmd->tl_sense_buf[0], tl_cmd->sc->device->lun, | |
e2a4f55c | 230 | transfer_length, tcm_loop_sam_attr(sc), |
8f9f44f8 NB |
231 | sc->sc_data_direction, 0, |
232 | scsi_sglist(sc), scsi_sg_count(sc), | |
59dedde2 NB |
233 | sgl_bidi, sgl_bidi_count, |
234 | scsi_prot_sglist(sc), scsi_prot_sg_count(sc)); | |
8f9f44f8 | 235 | if (rc < 0) { |
f872c9f4 CH |
236 | set_host_byte(sc, DID_NO_CONNECT); |
237 | goto out_done; | |
238 | } | |
afe2cb7f | 239 | return; |
f872c9f4 CH |
240 | |
241 | out_done: | |
b43f1886 | 242 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); |
f872c9f4 | 243 | sc->scsi_done(sc); |
afe2cb7f CH |
244 | return; |
245 | } | |
246 | ||
247 | /* | |
248 | * ->queuecommand can be and usually is called from interrupt context, so | |
249 | * defer the actual submission to a workqueue. | |
250 | */ | |
251 | static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) | |
252 | { | |
253 | struct tcm_loop_cmd *tl_cmd; | |
254 | ||
255 | pr_debug("tcm_loop_queuecommand() %d:%d:%d:%d got CDB: 0x%02x" | |
256 | " scsi_buf_len: %u\n", sc->device->host->host_no, | |
257 | sc->device->id, sc->device->channel, sc->device->lun, | |
258 | sc->cmnd[0], scsi_bufflen(sc)); | |
259 | ||
260 | tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); | |
261 | if (!tl_cmd) { | |
262 | pr_err("Unable to allocate struct tcm_loop_cmd\n"); | |
263 | set_host_byte(sc, DID_ERROR); | |
264 | sc->scsi_done(sc); | |
265 | return 0; | |
266 | } | |
267 | ||
268 | tl_cmd->sc = sc; | |
969871cd | 269 | tl_cmd->sc_cmd_tag = sc->tag; |
afe2cb7f CH |
270 | INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); |
271 | queue_work(tcm_loop_workqueue, &tl_cmd->work); | |
f872c9f4 | 272 | return 0; |
3703b2c5 NB |
273 | } |
274 | ||
275 | /* | |
276 | * Called from SCSI EH process context to issue a LUN_RESET TMR | |
277 | * to struct scsi_device | |
278 | */ | |
a314d700 HR |
279 | static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, |
280 | struct tcm_loop_nexus *tl_nexus, | |
969871cd | 281 | int lun, int task, enum tcm_tmreq_table tmr) |
3703b2c5 NB |
282 | { |
283 | struct se_cmd *se_cmd = NULL; | |
3703b2c5 | 284 | struct se_session *se_sess; |
a314d700 | 285 | struct se_portal_group *se_tpg; |
3703b2c5 | 286 | struct tcm_loop_cmd *tl_cmd = NULL; |
3703b2c5 | 287 | struct tcm_loop_tmr *tl_tmr = NULL; |
a314d700 | 288 | int ret = TMR_FUNCTION_FAILED, rc; |
3703b2c5 NB |
289 | |
290 | tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); | |
291 | if (!tl_cmd) { | |
6708bb27 | 292 | pr_err("Unable to allocate memory for tl_cmd\n"); |
a314d700 | 293 | return ret; |
3703b2c5 NB |
294 | } |
295 | ||
296 | tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); | |
297 | if (!tl_tmr) { | |
6708bb27 | 298 | pr_err("Unable to allocate memory for tl_tmr\n"); |
3703b2c5 NB |
299 | goto release; |
300 | } | |
301 | init_waitqueue_head(&tl_tmr->tl_tmr_wait); | |
302 | ||
303 | se_cmd = &tl_cmd->tl_se_cmd; | |
a314d700 HR |
304 | se_tpg = &tl_tpg->tl_se_tpg; |
305 | se_sess = tl_nexus->se_sess; | |
3703b2c5 NB |
306 | /* |
307 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
308 | */ | |
309 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, | |
61db1802 | 310 | DMA_NONE, MSG_SIMPLE_TAG, |
3703b2c5 | 311 | &tl_cmd->tl_sense_buf[0]); |
c8e31f26 | 312 | |
a314d700 | 313 | rc = core_tmr_alloc_req(se_cmd, tl_tmr, tmr, GFP_KERNEL); |
c8e31f26 | 314 | if (rc < 0) |
3703b2c5 | 315 | goto release; |
a314d700 | 316 | |
969871cd HR |
317 | if (tmr == TMR_ABORT_TASK) |
318 | se_cmd->se_tmr_req->ref_task_tag = task; | |
319 | ||
3703b2c5 | 320 | /* |
a314d700 | 321 | * Locate the underlying TCM struct se_lun |
3703b2c5 | 322 | */ |
a314d700 HR |
323 | if (transport_lookup_tmr_lun(se_cmd, lun) < 0) { |
324 | ret = TMR_LUN_DOES_NOT_EXIST; | |
3703b2c5 | 325 | goto release; |
a314d700 | 326 | } |
3703b2c5 | 327 | /* |
a314d700 HR |
328 | * Queue the TMR to TCM Core and sleep waiting for |
329 | * tcm_loop_queue_tm_rsp() to wake us up. | |
3703b2c5 NB |
330 | */ |
331 | transport_generic_handle_tmr(se_cmd); | |
332 | wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); | |
333 | /* | |
334 | * The TMR LUN_RESET has completed, check the response status and | |
335 | * then release allocations. | |
336 | */ | |
a314d700 | 337 | ret = se_cmd->se_tmr_req->response; |
3703b2c5 NB |
338 | release: |
339 | if (se_cmd) | |
82f1c8a4 | 340 | transport_generic_free_cmd(se_cmd, 1); |
3703b2c5 NB |
341 | else |
342 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); | |
343 | kfree(tl_tmr); | |
344 | return ret; | |
345 | } | |
346 | ||
969871cd HR |
347 | static int tcm_loop_abort_task(struct scsi_cmnd *sc) |
348 | { | |
349 | struct tcm_loop_hba *tl_hba; | |
350 | struct tcm_loop_nexus *tl_nexus; | |
351 | struct tcm_loop_tpg *tl_tpg; | |
352 | int ret = FAILED; | |
353 | ||
354 | /* | |
355 | * Locate the tcm_loop_hba_t pointer | |
356 | */ | |
357 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); | |
358 | /* | |
359 | * Locate the tl_nexus and se_sess pointers | |
360 | */ | |
361 | tl_nexus = tl_hba->tl_nexus; | |
362 | if (!tl_nexus) { | |
363 | pr_err("Unable to perform device reset without" | |
364 | " active I_T Nexus\n"); | |
365 | return FAILED; | |
366 | } | |
367 | ||
368 | /* | |
369 | * Locate the tl_tpg pointer from TargetID in sc->device->id | |
370 | */ | |
371 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; | |
372 | ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun, | |
373 | sc->tag, TMR_ABORT_TASK); | |
374 | return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; | |
375 | } | |
376 | ||
a314d700 HR |
377 | /* |
378 | * Called from SCSI EH process context to issue a LUN_RESET TMR | |
379 | * to struct scsi_device | |
380 | */ | |
381 | static int tcm_loop_device_reset(struct scsi_cmnd *sc) | |
382 | { | |
383 | struct tcm_loop_hba *tl_hba; | |
384 | struct tcm_loop_nexus *tl_nexus; | |
385 | struct tcm_loop_tpg *tl_tpg; | |
386 | int ret = FAILED; | |
387 | ||
388 | /* | |
389 | * Locate the tcm_loop_hba_t pointer | |
390 | */ | |
391 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); | |
392 | /* | |
393 | * Locate the tl_nexus and se_sess pointers | |
394 | */ | |
395 | tl_nexus = tl_hba->tl_nexus; | |
396 | if (!tl_nexus) { | |
397 | pr_err("Unable to perform device reset without" | |
398 | " active I_T Nexus\n"); | |
399 | return FAILED; | |
400 | } | |
401 | /* | |
402 | * Locate the tl_tpg pointer from TargetID in sc->device->id | |
403 | */ | |
404 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; | |
969871cd HR |
405 | ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun, |
406 | 0, TMR_LUN_RESET); | |
a314d700 HR |
407 | return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; |
408 | } | |
409 | ||
8f4a1fb0 HR |
410 | static int tcm_loop_target_reset(struct scsi_cmnd *sc) |
411 | { | |
412 | struct tcm_loop_hba *tl_hba; | |
413 | struct tcm_loop_tpg *tl_tpg; | |
414 | ||
415 | /* | |
416 | * Locate the tcm_loop_hba_t pointer | |
417 | */ | |
418 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); | |
419 | if (!tl_hba) { | |
420 | pr_err("Unable to perform device reset without" | |
421 | " active I_T Nexus\n"); | |
422 | return FAILED; | |
423 | } | |
424 | /* | |
425 | * Locate the tl_tpg pointer from TargetID in sc->device->id | |
426 | */ | |
427 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; | |
428 | if (tl_tpg) { | |
429 | tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; | |
430 | return SUCCESS; | |
431 | } | |
432 | return FAILED; | |
433 | } | |
434 | ||
3703b2c5 NB |
435 | static int tcm_loop_slave_alloc(struct scsi_device *sd) |
436 | { | |
437 | set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static int tcm_loop_slave_configure(struct scsi_device *sd) | |
442 | { | |
969871cd HR |
443 | if (sd->tagged_supported) { |
444 | scsi_activate_tcq(sd, sd->queue_depth); | |
445 | scsi_adjust_queue_depth(sd, MSG_SIMPLE_TAG, | |
446 | sd->host->cmd_per_lun); | |
447 | } else { | |
448 | scsi_adjust_queue_depth(sd, 0, | |
449 | sd->host->cmd_per_lun); | |
450 | } | |
451 | ||
3703b2c5 NB |
452 | return 0; |
453 | } | |
454 | ||
455 | static struct scsi_host_template tcm_loop_driver_template = { | |
8946b077 | 456 | .show_info = tcm_loop_show_info, |
3703b2c5 NB |
457 | .proc_name = "tcm_loopback", |
458 | .name = "TCM_Loopback", | |
459 | .queuecommand = tcm_loop_queuecommand, | |
460 | .change_queue_depth = tcm_loop_change_queue_depth, | |
969871cd HR |
461 | .change_queue_type = tcm_loop_change_queue_type, |
462 | .eh_abort_handler = tcm_loop_abort_task, | |
3703b2c5 | 463 | .eh_device_reset_handler = tcm_loop_device_reset, |
8f4a1fb0 | 464 | .eh_target_reset_handler = tcm_loop_target_reset, |
2e88efd3 | 465 | .can_queue = 1024, |
3703b2c5 | 466 | .this_id = -1, |
2e88efd3 CH |
467 | .sg_tablesize = 256, |
468 | .cmd_per_lun = 1024, | |
469 | .max_sectors = 0xFFFF, | |
3703b2c5 NB |
470 | .use_clustering = DISABLE_CLUSTERING, |
471 | .slave_alloc = tcm_loop_slave_alloc, | |
472 | .slave_configure = tcm_loop_slave_configure, | |
473 | .module = THIS_MODULE, | |
474 | }; | |
475 | ||
476 | static int tcm_loop_driver_probe(struct device *dev) | |
477 | { | |
478 | struct tcm_loop_hba *tl_hba; | |
479 | struct Scsi_Host *sh; | |
59dedde2 | 480 | int error, host_prot; |
3703b2c5 NB |
481 | |
482 | tl_hba = to_tcm_loop_hba(dev); | |
483 | ||
484 | sh = scsi_host_alloc(&tcm_loop_driver_template, | |
485 | sizeof(struct tcm_loop_hba)); | |
486 | if (!sh) { | |
6708bb27 | 487 | pr_err("Unable to allocate struct scsi_host\n"); |
3703b2c5 NB |
488 | return -ENODEV; |
489 | } | |
490 | tl_hba->sh = sh; | |
491 | ||
492 | /* | |
493 | * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata | |
494 | */ | |
495 | *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; | |
496 | /* | |
497 | * Setup single ID, Channel and LUN for now.. | |
498 | */ | |
499 | sh->max_id = 2; | |
500 | sh->max_lun = 0; | |
501 | sh->max_channel = 0; | |
502 | sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; | |
503 | ||
59dedde2 NB |
504 | host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION | |
505 | SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION | | |
506 | SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION; | |
507 | ||
508 | scsi_host_set_prot(sh, host_prot); | |
509 | scsi_host_set_guard(sh, SHOST_DIX_GUARD_CRC); | |
510 | ||
3703b2c5 NB |
511 | error = scsi_add_host(sh, &tl_hba->dev); |
512 | if (error) { | |
6708bb27 | 513 | pr_err("%s: scsi_add_host failed\n", __func__); |
3703b2c5 NB |
514 | scsi_host_put(sh); |
515 | return -ENODEV; | |
516 | } | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static int tcm_loop_driver_remove(struct device *dev) | |
521 | { | |
522 | struct tcm_loop_hba *tl_hba; | |
523 | struct Scsi_Host *sh; | |
524 | ||
525 | tl_hba = to_tcm_loop_hba(dev); | |
526 | sh = tl_hba->sh; | |
527 | ||
528 | scsi_remove_host(sh); | |
529 | scsi_host_put(sh); | |
530 | return 0; | |
531 | } | |
532 | ||
533 | static void tcm_loop_release_adapter(struct device *dev) | |
534 | { | |
535 | struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); | |
536 | ||
537 | kfree(tl_hba); | |
538 | } | |
539 | ||
540 | /* | |
541 | * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c | |
542 | */ | |
543 | static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) | |
544 | { | |
545 | int ret; | |
546 | ||
547 | tl_hba->dev.bus = &tcm_loop_lld_bus; | |
548 | tl_hba->dev.parent = tcm_loop_primary; | |
549 | tl_hba->dev.release = &tcm_loop_release_adapter; | |
550 | dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); | |
551 | ||
552 | ret = device_register(&tl_hba->dev); | |
553 | if (ret) { | |
6708bb27 | 554 | pr_err("device_register() failed for" |
3703b2c5 NB |
555 | " tl_hba->dev: %d\n", ret); |
556 | return -ENODEV; | |
557 | } | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
562 | /* | |
563 | * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated | |
564 | * tcm_loop SCSI bus. | |
565 | */ | |
566 | static int tcm_loop_alloc_core_bus(void) | |
567 | { | |
568 | int ret; | |
569 | ||
570 | tcm_loop_primary = root_device_register("tcm_loop_0"); | |
571 | if (IS_ERR(tcm_loop_primary)) { | |
6708bb27 | 572 | pr_err("Unable to allocate tcm_loop_primary\n"); |
3703b2c5 NB |
573 | return PTR_ERR(tcm_loop_primary); |
574 | } | |
575 | ||
576 | ret = bus_register(&tcm_loop_lld_bus); | |
577 | if (ret) { | |
6708bb27 | 578 | pr_err("bus_register() failed for tcm_loop_lld_bus\n"); |
3703b2c5 NB |
579 | goto dev_unreg; |
580 | } | |
581 | ||
582 | ret = driver_register(&tcm_loop_driverfs); | |
583 | if (ret) { | |
6708bb27 | 584 | pr_err("driver_register() failed for" |
3703b2c5 NB |
585 | "tcm_loop_driverfs\n"); |
586 | goto bus_unreg; | |
587 | } | |
588 | ||
6708bb27 | 589 | pr_debug("Initialized TCM Loop Core Bus\n"); |
3703b2c5 NB |
590 | return ret; |
591 | ||
592 | bus_unreg: | |
593 | bus_unregister(&tcm_loop_lld_bus); | |
594 | dev_unreg: | |
595 | root_device_unregister(tcm_loop_primary); | |
596 | return ret; | |
597 | } | |
598 | ||
599 | static void tcm_loop_release_core_bus(void) | |
600 | { | |
601 | driver_unregister(&tcm_loop_driverfs); | |
602 | bus_unregister(&tcm_loop_lld_bus); | |
603 | root_device_unregister(tcm_loop_primary); | |
604 | ||
6708bb27 | 605 | pr_debug("Releasing TCM Loop Core BUS\n"); |
3703b2c5 NB |
606 | } |
607 | ||
608 | static char *tcm_loop_get_fabric_name(void) | |
609 | { | |
610 | return "loopback"; | |
611 | } | |
612 | ||
613 | static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) | |
614 | { | |
8359cf43 | 615 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
616 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
617 | /* | |
618 | * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() | |
619 | * time based on the protocol dependent prefix of the passed configfs group. | |
620 | * | |
621 | * Based upon tl_proto_id, TCM_Loop emulates the requested fabric | |
622 | * ProtocolID using target_core_fabric_lib.c symbols. | |
623 | */ | |
624 | switch (tl_hba->tl_proto_id) { | |
625 | case SCSI_PROTOCOL_SAS: | |
626 | return sas_get_fabric_proto_ident(se_tpg); | |
627 | case SCSI_PROTOCOL_FCP: | |
628 | return fc_get_fabric_proto_ident(se_tpg); | |
629 | case SCSI_PROTOCOL_ISCSI: | |
630 | return iscsi_get_fabric_proto_ident(se_tpg); | |
631 | default: | |
6708bb27 | 632 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
633 | " SAS emulation\n", tl_hba->tl_proto_id); |
634 | break; | |
635 | } | |
636 | ||
637 | return sas_get_fabric_proto_ident(se_tpg); | |
638 | } | |
639 | ||
640 | static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) | |
641 | { | |
8359cf43 | 642 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
643 | /* |
644 | * Return the passed NAA identifier for the SAS Target Port | |
645 | */ | |
646 | return &tl_tpg->tl_hba->tl_wwn_address[0]; | |
647 | } | |
648 | ||
649 | static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) | |
650 | { | |
8359cf43 | 651 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
652 | /* |
653 | * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 | |
654 | * to represent the SCSI Target Port. | |
655 | */ | |
656 | return tl_tpg->tl_tpgt; | |
657 | } | |
658 | ||
659 | static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) | |
660 | { | |
661 | return 1; | |
662 | } | |
663 | ||
664 | static u32 tcm_loop_get_pr_transport_id( | |
665 | struct se_portal_group *se_tpg, | |
666 | struct se_node_acl *se_nacl, | |
667 | struct t10_pr_registration *pr_reg, | |
668 | int *format_code, | |
669 | unsigned char *buf) | |
670 | { | |
8359cf43 | 671 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
672 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
673 | ||
674 | switch (tl_hba->tl_proto_id) { | |
675 | case SCSI_PROTOCOL_SAS: | |
676 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
677 | format_code, buf); | |
678 | case SCSI_PROTOCOL_FCP: | |
679 | return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
680 | format_code, buf); | |
681 | case SCSI_PROTOCOL_ISCSI: | |
682 | return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
683 | format_code, buf); | |
684 | default: | |
6708bb27 | 685 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
686 | " SAS emulation\n", tl_hba->tl_proto_id); |
687 | break; | |
688 | } | |
689 | ||
690 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
691 | format_code, buf); | |
692 | } | |
693 | ||
694 | static u32 tcm_loop_get_pr_transport_id_len( | |
695 | struct se_portal_group *se_tpg, | |
696 | struct se_node_acl *se_nacl, | |
697 | struct t10_pr_registration *pr_reg, | |
698 | int *format_code) | |
699 | { | |
8359cf43 | 700 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
701 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
702 | ||
703 | switch (tl_hba->tl_proto_id) { | |
704 | case SCSI_PROTOCOL_SAS: | |
705 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
706 | format_code); | |
707 | case SCSI_PROTOCOL_FCP: | |
708 | return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
709 | format_code); | |
710 | case SCSI_PROTOCOL_ISCSI: | |
711 | return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
712 | format_code); | |
713 | default: | |
6708bb27 | 714 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
715 | " SAS emulation\n", tl_hba->tl_proto_id); |
716 | break; | |
717 | } | |
718 | ||
719 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
720 | format_code); | |
721 | } | |
722 | ||
723 | /* | |
724 | * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above | |
725 | * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. | |
726 | */ | |
727 | static char *tcm_loop_parse_pr_out_transport_id( | |
728 | struct se_portal_group *se_tpg, | |
729 | const char *buf, | |
730 | u32 *out_tid_len, | |
731 | char **port_nexus_ptr) | |
732 | { | |
8359cf43 | 733 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
734 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
735 | ||
736 | switch (tl_hba->tl_proto_id) { | |
737 | case SCSI_PROTOCOL_SAS: | |
738 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
739 | port_nexus_ptr); | |
740 | case SCSI_PROTOCOL_FCP: | |
741 | return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
742 | port_nexus_ptr); | |
743 | case SCSI_PROTOCOL_ISCSI: | |
744 | return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
745 | port_nexus_ptr); | |
746 | default: | |
6708bb27 | 747 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
748 | " SAS emulation\n", tl_hba->tl_proto_id); |
749 | break; | |
750 | } | |
751 | ||
752 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
753 | port_nexus_ptr); | |
754 | } | |
755 | ||
756 | /* | |
757 | * Returning (1) here allows for target_core_mod struct se_node_acl to be generated | |
758 | * based upon the incoming fabric dependent SCSI Initiator Port | |
759 | */ | |
760 | static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) | |
761 | { | |
762 | return 1; | |
763 | } | |
764 | ||
765 | static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) | |
766 | { | |
767 | return 0; | |
768 | } | |
769 | ||
770 | /* | |
771 | * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for | |
772 | * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest | |
773 | */ | |
774 | static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) | |
775 | { | |
776 | return 0; | |
777 | } | |
778 | ||
779 | /* | |
780 | * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will | |
781 | * never be called for TCM_Loop by target_core_fabric_configfs.c code. | |
782 | * It has been added here as a nop for target_fabric_tf_ops_check() | |
783 | */ | |
784 | static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) | |
785 | { | |
786 | return 0; | |
787 | } | |
788 | ||
789 | static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( | |
790 | struct se_portal_group *se_tpg) | |
791 | { | |
792 | struct tcm_loop_nacl *tl_nacl; | |
793 | ||
794 | tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); | |
795 | if (!tl_nacl) { | |
6708bb27 | 796 | pr_err("Unable to allocate struct tcm_loop_nacl\n"); |
3703b2c5 NB |
797 | return NULL; |
798 | } | |
799 | ||
800 | return &tl_nacl->se_node_acl; | |
801 | } | |
802 | ||
803 | static void tcm_loop_tpg_release_fabric_acl( | |
804 | struct se_portal_group *se_tpg, | |
805 | struct se_node_acl *se_nacl) | |
806 | { | |
807 | struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, | |
808 | struct tcm_loop_nacl, se_node_acl); | |
809 | ||
810 | kfree(tl_nacl); | |
811 | } | |
812 | ||
813 | static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) | |
814 | { | |
815 | return 1; | |
816 | } | |
817 | ||
3703b2c5 NB |
818 | static u32 tcm_loop_sess_get_index(struct se_session *se_sess) |
819 | { | |
820 | return 1; | |
821 | } | |
822 | ||
823 | static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) | |
824 | { | |
825 | return; | |
826 | } | |
827 | ||
828 | static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) | |
829 | { | |
969871cd HR |
830 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, |
831 | struct tcm_loop_cmd, tl_se_cmd); | |
832 | ||
833 | return tl_cmd->sc_cmd_tag; | |
3703b2c5 NB |
834 | } |
835 | ||
836 | static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) | |
837 | { | |
838 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
839 | struct tcm_loop_cmd, tl_se_cmd); | |
840 | ||
841 | return tl_cmd->sc_cmd_state; | |
842 | } | |
843 | ||
844 | static int tcm_loop_shutdown_session(struct se_session *se_sess) | |
845 | { | |
846 | return 0; | |
847 | } | |
848 | ||
849 | static void tcm_loop_close_session(struct se_session *se_sess) | |
850 | { | |
851 | return; | |
852 | }; | |
853 | ||
3703b2c5 NB |
854 | static int tcm_loop_write_pending(struct se_cmd *se_cmd) |
855 | { | |
856 | /* | |
857 | * Since Linux/SCSI has already sent down a struct scsi_cmnd | |
858 | * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array | |
859 | * memory, and memory has already been mapped to struct se_cmd->t_mem_list | |
860 | * format with transport_generic_map_mem_to_cmd(). | |
861 | * | |
862 | * We now tell TCM to add this WRITE CDB directly into the TCM storage | |
863 | * object execution queue. | |
864 | */ | |
70baf0ab | 865 | target_execute_cmd(se_cmd); |
3703b2c5 NB |
866 | return 0; |
867 | } | |
868 | ||
869 | static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) | |
870 | { | |
871 | return 0; | |
872 | } | |
873 | ||
874 | static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) | |
875 | { | |
876 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
877 | struct tcm_loop_cmd, tl_se_cmd); | |
878 | struct scsi_cmnd *sc = tl_cmd->sc; | |
879 | ||
6708bb27 | 880 | pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" |
3703b2c5 NB |
881 | " cdb: 0x%02x\n", sc, sc->cmnd[0]); |
882 | ||
883 | sc->result = SAM_STAT_GOOD; | |
884 | set_host_byte(sc, DID_OK); | |
6cf3fa69 RD |
885 | if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || |
886 | (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) | |
887 | scsi_set_resid(sc, se_cmd->residual_count); | |
3703b2c5 NB |
888 | sc->scsi_done(sc); |
889 | return 0; | |
890 | } | |
891 | ||
892 | static int tcm_loop_queue_status(struct se_cmd *se_cmd) | |
893 | { | |
894 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
895 | struct tcm_loop_cmd, tl_se_cmd); | |
896 | struct scsi_cmnd *sc = tl_cmd->sc; | |
897 | ||
6708bb27 | 898 | pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" |
3703b2c5 NB |
899 | " cdb: 0x%02x\n", sc, sc->cmnd[0]); |
900 | ||
901 | if (se_cmd->sense_buffer && | |
902 | ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
903 | (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
904 | ||
5951146d | 905 | memcpy(sc->sense_buffer, se_cmd->sense_buffer, |
3703b2c5 NB |
906 | SCSI_SENSE_BUFFERSIZE); |
907 | sc->result = SAM_STAT_CHECK_CONDITION; | |
908 | set_driver_byte(sc, DRIVER_SENSE); | |
909 | } else | |
910 | sc->result = se_cmd->scsi_status; | |
911 | ||
912 | set_host_byte(sc, DID_OK); | |
6cf3fa69 RD |
913 | if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || |
914 | (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) | |
915 | scsi_set_resid(sc, se_cmd->residual_count); | |
3703b2c5 NB |
916 | sc->scsi_done(sc); |
917 | return 0; | |
918 | } | |
919 | ||
b79fafac | 920 | static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) |
3703b2c5 NB |
921 | { |
922 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; | |
923 | struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; | |
924 | /* | |
925 | * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead | |
926 | * and wake up the wait_queue_head_t in tcm_loop_device_reset() | |
927 | */ | |
928 | atomic_set(&tl_tmr->tmr_complete, 1); | |
929 | wake_up(&tl_tmr->tl_tmr_wait); | |
3703b2c5 NB |
930 | } |
931 | ||
131e6abc NB |
932 | static void tcm_loop_aborted_task(struct se_cmd *se_cmd) |
933 | { | |
934 | return; | |
935 | } | |
936 | ||
3703b2c5 NB |
937 | static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) |
938 | { | |
939 | switch (tl_hba->tl_proto_id) { | |
940 | case SCSI_PROTOCOL_SAS: | |
941 | return "SAS"; | |
942 | case SCSI_PROTOCOL_FCP: | |
943 | return "FCP"; | |
944 | case SCSI_PROTOCOL_ISCSI: | |
945 | return "iSCSI"; | |
946 | default: | |
947 | break; | |
948 | } | |
949 | ||
950 | return "Unknown"; | |
951 | } | |
952 | ||
953 | /* Start items for tcm_loop_port_cit */ | |
954 | ||
955 | static int tcm_loop_port_link( | |
956 | struct se_portal_group *se_tpg, | |
957 | struct se_lun *lun) | |
958 | { | |
959 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
960 | struct tcm_loop_tpg, tl_se_tpg); | |
961 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; | |
962 | ||
963 | atomic_inc(&tl_tpg->tl_tpg_port_count); | |
4e857c58 | 964 | smp_mb__after_atomic(); |
3703b2c5 NB |
965 | /* |
966 | * Add Linux/SCSI struct scsi_device by HCTL | |
967 | */ | |
968 | scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); | |
969 | ||
6708bb27 | 970 | pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); |
3703b2c5 NB |
971 | return 0; |
972 | } | |
973 | ||
974 | static void tcm_loop_port_unlink( | |
975 | struct se_portal_group *se_tpg, | |
976 | struct se_lun *se_lun) | |
977 | { | |
978 | struct scsi_device *sd; | |
979 | struct tcm_loop_hba *tl_hba; | |
980 | struct tcm_loop_tpg *tl_tpg; | |
981 | ||
982 | tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); | |
983 | tl_hba = tl_tpg->tl_hba; | |
984 | ||
985 | sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, | |
986 | se_lun->unpacked_lun); | |
987 | if (!sd) { | |
6708bb27 | 988 | pr_err("Unable to locate struct scsi_device for %d:%d:" |
3703b2c5 NB |
989 | "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); |
990 | return; | |
991 | } | |
992 | /* | |
993 | * Remove Linux/SCSI struct scsi_device by HCTL | |
994 | */ | |
995 | scsi_remove_device(sd); | |
996 | scsi_device_put(sd); | |
997 | ||
998 | atomic_dec(&tl_tpg->tl_tpg_port_count); | |
4e857c58 | 999 | smp_mb__after_atomic(); |
3703b2c5 | 1000 | |
6708bb27 | 1001 | pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); |
3703b2c5 NB |
1002 | } |
1003 | ||
1004 | /* End items for tcm_loop_port_cit */ | |
1005 | ||
1006 | /* Start items for tcm_loop_nexus_cit */ | |
1007 | ||
1008 | static int tcm_loop_make_nexus( | |
1009 | struct tcm_loop_tpg *tl_tpg, | |
1010 | const char *name) | |
1011 | { | |
1012 | struct se_portal_group *se_tpg; | |
1013 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; | |
1014 | struct tcm_loop_nexus *tl_nexus; | |
552523dc | 1015 | int ret = -ENOMEM; |
3703b2c5 NB |
1016 | |
1017 | if (tl_tpg->tl_hba->tl_nexus) { | |
6708bb27 | 1018 | pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n"); |
3703b2c5 NB |
1019 | return -EEXIST; |
1020 | } | |
1021 | se_tpg = &tl_tpg->tl_se_tpg; | |
1022 | ||
1023 | tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); | |
1024 | if (!tl_nexus) { | |
6708bb27 | 1025 | pr_err("Unable to allocate struct tcm_loop_nexus\n"); |
3703b2c5 NB |
1026 | return -ENOMEM; |
1027 | } | |
1028 | /* | |
1029 | * Initialize the struct se_session pointer | |
1030 | */ | |
e70beee7 | 1031 | tl_nexus->se_sess = transport_init_session(TARGET_PROT_ALL); |
552523dc DC |
1032 | if (IS_ERR(tl_nexus->se_sess)) { |
1033 | ret = PTR_ERR(tl_nexus->se_sess); | |
3703b2c5 | 1034 | goto out; |
552523dc | 1035 | } |
3703b2c5 NB |
1036 | /* |
1037 | * Since we are running in 'demo mode' this call with generate a | |
1038 | * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI | |
1039 | * Initiator port name of the passed configfs group 'name'. | |
1040 | */ | |
1041 | tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( | |
1042 | se_tpg, (unsigned char *)name); | |
1043 | if (!tl_nexus->se_sess->se_node_acl) { | |
1044 | transport_free_session(tl_nexus->se_sess); | |
1045 | goto out; | |
1046 | } | |
1047 | /* | |
1048 | * Now, register the SAS I_T Nexus as active with the call to | |
1049 | * transport_register_session() | |
1050 | */ | |
1051 | __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, | |
5951146d | 1052 | tl_nexus->se_sess, tl_nexus); |
3703b2c5 | 1053 | tl_tpg->tl_hba->tl_nexus = tl_nexus; |
6708bb27 | 1054 | pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" |
3703b2c5 NB |
1055 | " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), |
1056 | name); | |
1057 | return 0; | |
1058 | ||
1059 | out: | |
1060 | kfree(tl_nexus); | |
552523dc | 1061 | return ret; |
3703b2c5 NB |
1062 | } |
1063 | ||
1064 | static int tcm_loop_drop_nexus( | |
1065 | struct tcm_loop_tpg *tpg) | |
1066 | { | |
1067 | struct se_session *se_sess; | |
1068 | struct tcm_loop_nexus *tl_nexus; | |
1069 | struct tcm_loop_hba *tl_hba = tpg->tl_hba; | |
1070 | ||
1ec59fee HR |
1071 | if (!tl_hba) |
1072 | return -ENODEV; | |
1073 | ||
1074 | tl_nexus = tl_hba->tl_nexus; | |
3703b2c5 NB |
1075 | if (!tl_nexus) |
1076 | return -ENODEV; | |
1077 | ||
1078 | se_sess = tl_nexus->se_sess; | |
1079 | if (!se_sess) | |
1080 | return -ENODEV; | |
1081 | ||
1082 | if (atomic_read(&tpg->tl_tpg_port_count)) { | |
6708bb27 | 1083 | pr_err("Unable to remove TCM_Loop I_T Nexus with" |
3703b2c5 NB |
1084 | " active TPG port count: %d\n", |
1085 | atomic_read(&tpg->tl_tpg_port_count)); | |
1086 | return -EPERM; | |
1087 | } | |
1088 | ||
6708bb27 | 1089 | pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" |
3703b2c5 NB |
1090 | " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), |
1091 | tl_nexus->se_sess->se_node_acl->initiatorname); | |
1092 | /* | |
1093 | * Release the SCSI I_T Nexus to the emulated SAS Target Port | |
1094 | */ | |
1095 | transport_deregister_session(tl_nexus->se_sess); | |
1096 | tpg->tl_hba->tl_nexus = NULL; | |
1097 | kfree(tl_nexus); | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | /* End items for tcm_loop_nexus_cit */ | |
1102 | ||
1103 | static ssize_t tcm_loop_tpg_show_nexus( | |
1104 | struct se_portal_group *se_tpg, | |
1105 | char *page) | |
1106 | { | |
1107 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1108 | struct tcm_loop_tpg, tl_se_tpg); | |
1109 | struct tcm_loop_nexus *tl_nexus; | |
1110 | ssize_t ret; | |
1111 | ||
1112 | tl_nexus = tl_tpg->tl_hba->tl_nexus; | |
1113 | if (!tl_nexus) | |
1114 | return -ENODEV; | |
1115 | ||
1116 | ret = snprintf(page, PAGE_SIZE, "%s\n", | |
1117 | tl_nexus->se_sess->se_node_acl->initiatorname); | |
1118 | ||
1119 | return ret; | |
1120 | } | |
1121 | ||
1122 | static ssize_t tcm_loop_tpg_store_nexus( | |
1123 | struct se_portal_group *se_tpg, | |
1124 | const char *page, | |
1125 | size_t count) | |
1126 | { | |
1127 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1128 | struct tcm_loop_tpg, tl_se_tpg); | |
1129 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; | |
1130 | unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; | |
1131 | int ret; | |
1132 | /* | |
1133 | * Shutdown the active I_T nexus if 'NULL' is passed.. | |
1134 | */ | |
1135 | if (!strncmp(page, "NULL", 4)) { | |
1136 | ret = tcm_loop_drop_nexus(tl_tpg); | |
1137 | return (!ret) ? count : ret; | |
1138 | } | |
1139 | /* | |
1140 | * Otherwise make sure the passed virtual Initiator port WWN matches | |
1141 | * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call | |
1142 | * tcm_loop_make_nexus() | |
1143 | */ | |
60d645a4 | 1144 | if (strlen(page) >= TL_WWN_ADDR_LEN) { |
6708bb27 | 1145 | pr_err("Emulated NAA Sas Address: %s, exceeds" |
3703b2c5 NB |
1146 | " max: %d\n", page, TL_WWN_ADDR_LEN); |
1147 | return -EINVAL; | |
1148 | } | |
1149 | snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); | |
1150 | ||
1151 | ptr = strstr(i_port, "naa."); | |
1152 | if (ptr) { | |
1153 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { | |
6708bb27 | 1154 | pr_err("Passed SAS Initiator Port %s does not" |
3703b2c5 NB |
1155 | " match target port protoid: %s\n", i_port, |
1156 | tcm_loop_dump_proto_id(tl_hba)); | |
1157 | return -EINVAL; | |
1158 | } | |
1159 | port_ptr = &i_port[0]; | |
1160 | goto check_newline; | |
1161 | } | |
1162 | ptr = strstr(i_port, "fc."); | |
1163 | if (ptr) { | |
1164 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { | |
6708bb27 | 1165 | pr_err("Passed FCP Initiator Port %s does not" |
3703b2c5 NB |
1166 | " match target port protoid: %s\n", i_port, |
1167 | tcm_loop_dump_proto_id(tl_hba)); | |
1168 | return -EINVAL; | |
1169 | } | |
1170 | port_ptr = &i_port[3]; /* Skip over "fc." */ | |
1171 | goto check_newline; | |
1172 | } | |
1173 | ptr = strstr(i_port, "iqn."); | |
1174 | if (ptr) { | |
1175 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { | |
6708bb27 | 1176 | pr_err("Passed iSCSI Initiator Port %s does not" |
3703b2c5 NB |
1177 | " match target port protoid: %s\n", i_port, |
1178 | tcm_loop_dump_proto_id(tl_hba)); | |
1179 | return -EINVAL; | |
1180 | } | |
1181 | port_ptr = &i_port[0]; | |
1182 | goto check_newline; | |
1183 | } | |
6708bb27 | 1184 | pr_err("Unable to locate prefix for emulated Initiator Port:" |
3703b2c5 NB |
1185 | " %s\n", i_port); |
1186 | return -EINVAL; | |
1187 | /* | |
1188 | * Clear any trailing newline for the NAA WWN | |
1189 | */ | |
1190 | check_newline: | |
1191 | if (i_port[strlen(i_port)-1] == '\n') | |
1192 | i_port[strlen(i_port)-1] = '\0'; | |
1193 | ||
1194 | ret = tcm_loop_make_nexus(tl_tpg, port_ptr); | |
1195 | if (ret < 0) | |
1196 | return ret; | |
1197 | ||
1198 | return count; | |
1199 | } | |
1200 | ||
1201 | TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); | |
1202 | ||
fb2b2844 HR |
1203 | static ssize_t tcm_loop_tpg_show_transport_status( |
1204 | struct se_portal_group *se_tpg, | |
1205 | char *page) | |
1206 | { | |
1207 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1208 | struct tcm_loop_tpg, tl_se_tpg); | |
1209 | const char *status = NULL; | |
1210 | ssize_t ret = -EINVAL; | |
1211 | ||
1212 | switch (tl_tpg->tl_transport_status) { | |
1213 | case TCM_TRANSPORT_ONLINE: | |
1214 | status = "online"; | |
1215 | break; | |
1216 | case TCM_TRANSPORT_OFFLINE: | |
1217 | status = "offline"; | |
1218 | break; | |
1219 | default: | |
1220 | break; | |
1221 | } | |
1222 | ||
1223 | if (status) | |
1224 | ret = snprintf(page, PAGE_SIZE, "%s\n", status); | |
1225 | ||
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | static ssize_t tcm_loop_tpg_store_transport_status( | |
1230 | struct se_portal_group *se_tpg, | |
1231 | const char *page, | |
1232 | size_t count) | |
1233 | { | |
1234 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1235 | struct tcm_loop_tpg, tl_se_tpg); | |
1236 | ||
1237 | if (!strncmp(page, "online", 6)) { | |
1238 | tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; | |
1239 | return count; | |
1240 | } | |
1241 | if (!strncmp(page, "offline", 7)) { | |
1242 | tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE; | |
1243 | return count; | |
1244 | } | |
1245 | return -EINVAL; | |
1246 | } | |
1247 | ||
1248 | TF_TPG_BASE_ATTR(tcm_loop, transport_status, S_IRUGO | S_IWUSR); | |
1249 | ||
3703b2c5 NB |
1250 | static struct configfs_attribute *tcm_loop_tpg_attrs[] = { |
1251 | &tcm_loop_tpg_nexus.attr, | |
fb2b2844 | 1252 | &tcm_loop_tpg_transport_status.attr, |
3703b2c5 NB |
1253 | NULL, |
1254 | }; | |
1255 | ||
1256 | /* Start items for tcm_loop_naa_cit */ | |
1257 | ||
f0a6c693 | 1258 | static struct se_portal_group *tcm_loop_make_naa_tpg( |
3703b2c5 NB |
1259 | struct se_wwn *wwn, |
1260 | struct config_group *group, | |
1261 | const char *name) | |
1262 | { | |
1263 | struct tcm_loop_hba *tl_hba = container_of(wwn, | |
1264 | struct tcm_loop_hba, tl_hba_wwn); | |
1265 | struct tcm_loop_tpg *tl_tpg; | |
1266 | char *tpgt_str, *end_ptr; | |
1267 | int ret; | |
1268 | unsigned short int tpgt; | |
1269 | ||
1270 | tpgt_str = strstr(name, "tpgt_"); | |
1271 | if (!tpgt_str) { | |
6708bb27 | 1272 | pr_err("Unable to locate \"tpgt_#\" directory" |
3703b2c5 NB |
1273 | " group\n"); |
1274 | return ERR_PTR(-EINVAL); | |
1275 | } | |
1276 | tpgt_str += 5; /* Skip ahead of "tpgt_" */ | |
1277 | tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); | |
1278 | ||
12f09ccb | 1279 | if (tpgt >= TL_TPGS_PER_HBA) { |
6708bb27 | 1280 | pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" |
3703b2c5 NB |
1281 | " %u\n", tpgt, TL_TPGS_PER_HBA); |
1282 | return ERR_PTR(-EINVAL); | |
1283 | } | |
1284 | tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; | |
1285 | tl_tpg->tl_hba = tl_hba; | |
1286 | tl_tpg->tl_tpgt = tpgt; | |
1287 | /* | |
1288 | * Register the tl_tpg as a emulated SAS TCM Target Endpoint | |
1289 | */ | |
1290 | ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, | |
5951146d | 1291 | wwn, &tl_tpg->tl_se_tpg, tl_tpg, |
3703b2c5 NB |
1292 | TRANSPORT_TPG_TYPE_NORMAL); |
1293 | if (ret < 0) | |
1294 | return ERR_PTR(-ENOMEM); | |
1295 | ||
6708bb27 | 1296 | pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" |
3703b2c5 NB |
1297 | " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), |
1298 | config_item_name(&wwn->wwn_group.cg_item), tpgt); | |
1299 | ||
1300 | return &tl_tpg->tl_se_tpg; | |
1301 | } | |
1302 | ||
f0a6c693 | 1303 | static void tcm_loop_drop_naa_tpg( |
3703b2c5 NB |
1304 | struct se_portal_group *se_tpg) |
1305 | { | |
1306 | struct se_wwn *wwn = se_tpg->se_tpg_wwn; | |
1307 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1308 | struct tcm_loop_tpg, tl_se_tpg); | |
1309 | struct tcm_loop_hba *tl_hba; | |
1310 | unsigned short tpgt; | |
1311 | ||
1312 | tl_hba = tl_tpg->tl_hba; | |
1313 | tpgt = tl_tpg->tl_tpgt; | |
1314 | /* | |
1315 | * Release the I_T Nexus for the Virtual SAS link if present | |
1316 | */ | |
1317 | tcm_loop_drop_nexus(tl_tpg); | |
1318 | /* | |
1319 | * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint | |
1320 | */ | |
1321 | core_tpg_deregister(se_tpg); | |
1322 | ||
0a020436 NB |
1323 | tl_tpg->tl_hba = NULL; |
1324 | tl_tpg->tl_tpgt = 0; | |
1325 | ||
6708bb27 | 1326 | pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" |
3703b2c5 NB |
1327 | " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), |
1328 | config_item_name(&wwn->wwn_group.cg_item), tpgt); | |
1329 | } | |
1330 | ||
1331 | /* End items for tcm_loop_naa_cit */ | |
1332 | ||
1333 | /* Start items for tcm_loop_cit */ | |
1334 | ||
f0a6c693 | 1335 | static struct se_wwn *tcm_loop_make_scsi_hba( |
3703b2c5 NB |
1336 | struct target_fabric_configfs *tf, |
1337 | struct config_group *group, | |
1338 | const char *name) | |
1339 | { | |
1340 | struct tcm_loop_hba *tl_hba; | |
1341 | struct Scsi_Host *sh; | |
1342 | char *ptr; | |
1343 | int ret, off = 0; | |
1344 | ||
1345 | tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); | |
1346 | if (!tl_hba) { | |
6708bb27 | 1347 | pr_err("Unable to allocate struct tcm_loop_hba\n"); |
3703b2c5 NB |
1348 | return ERR_PTR(-ENOMEM); |
1349 | } | |
1350 | /* | |
1351 | * Determine the emulated Protocol Identifier and Target Port Name | |
1352 | * based on the incoming configfs directory name. | |
1353 | */ | |
1354 | ptr = strstr(name, "naa."); | |
1355 | if (ptr) { | |
1356 | tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; | |
1357 | goto check_len; | |
1358 | } | |
1359 | ptr = strstr(name, "fc."); | |
1360 | if (ptr) { | |
1361 | tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; | |
1362 | off = 3; /* Skip over "fc." */ | |
1363 | goto check_len; | |
1364 | } | |
1365 | ptr = strstr(name, "iqn."); | |
a57b5d36 | 1366 | if (!ptr) { |
6708bb27 | 1367 | pr_err("Unable to locate prefix for emulated Target " |
a57b5d36 JJ |
1368 | "Port: %s\n", name); |
1369 | ret = -EINVAL; | |
1370 | goto out; | |
3703b2c5 | 1371 | } |
a57b5d36 | 1372 | tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; |
3703b2c5 NB |
1373 | |
1374 | check_len: | |
60d645a4 | 1375 | if (strlen(name) >= TL_WWN_ADDR_LEN) { |
6708bb27 | 1376 | pr_err("Emulated NAA %s Address: %s, exceeds" |
3703b2c5 NB |
1377 | " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), |
1378 | TL_WWN_ADDR_LEN); | |
a57b5d36 JJ |
1379 | ret = -EINVAL; |
1380 | goto out; | |
3703b2c5 NB |
1381 | } |
1382 | snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); | |
1383 | ||
1384 | /* | |
1385 | * Call device_register(tl_hba->dev) to register the emulated | |
1386 | * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after | |
1387 | * device_register() callbacks in tcm_loop_driver_probe() | |
1388 | */ | |
1389 | ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); | |
1390 | if (ret) | |
1391 | goto out; | |
1392 | ||
1393 | sh = tl_hba->sh; | |
1394 | tcm_loop_hba_no_cnt++; | |
6708bb27 | 1395 | pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" |
3703b2c5 NB |
1396 | " %s Address: %s at Linux/SCSI Host ID: %d\n", |
1397 | tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); | |
1398 | ||
1399 | return &tl_hba->tl_hba_wwn; | |
1400 | out: | |
1401 | kfree(tl_hba); | |
1402 | return ERR_PTR(ret); | |
1403 | } | |
1404 | ||
f0a6c693 | 1405 | static void tcm_loop_drop_scsi_hba( |
3703b2c5 NB |
1406 | struct se_wwn *wwn) |
1407 | { | |
1408 | struct tcm_loop_hba *tl_hba = container_of(wwn, | |
1409 | struct tcm_loop_hba, tl_hba_wwn); | |
6297b07c NB |
1410 | |
1411 | pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target" | |
1412 | " SAS Address: %s at Linux/SCSI Host ID: %d\n", | |
1413 | tl_hba->tl_wwn_address, tl_hba->sh->host_no); | |
3703b2c5 NB |
1414 | /* |
1415 | * Call device_unregister() on the original tl_hba->dev. | |
1416 | * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will | |
1417 | * release *tl_hba; | |
1418 | */ | |
1419 | device_unregister(&tl_hba->dev); | |
3703b2c5 NB |
1420 | } |
1421 | ||
1422 | /* Start items for tcm_loop_cit */ | |
1423 | static ssize_t tcm_loop_wwn_show_attr_version( | |
1424 | struct target_fabric_configfs *tf, | |
1425 | char *page) | |
1426 | { | |
1427 | return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); | |
1428 | } | |
1429 | ||
1430 | TF_WWN_ATTR_RO(tcm_loop, version); | |
1431 | ||
1432 | static struct configfs_attribute *tcm_loop_wwn_attrs[] = { | |
1433 | &tcm_loop_wwn_version.attr, | |
1434 | NULL, | |
1435 | }; | |
1436 | ||
1437 | /* End items for tcm_loop_cit */ | |
1438 | ||
1439 | static int tcm_loop_register_configfs(void) | |
1440 | { | |
1441 | struct target_fabric_configfs *fabric; | |
3703b2c5 NB |
1442 | int ret; |
1443 | /* | |
1444 | * Set the TCM Loop HBA counter to zero | |
1445 | */ | |
1446 | tcm_loop_hba_no_cnt = 0; | |
1447 | /* | |
1448 | * Register the top level struct config_item_type with TCM core | |
1449 | */ | |
1450 | fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); | |
e3d6f909 | 1451 | if (IS_ERR(fabric)) { |
6708bb27 | 1452 | pr_err("tcm_loop_register_configfs() failed!\n"); |
e3d6f909 | 1453 | return PTR_ERR(fabric); |
3703b2c5 NB |
1454 | } |
1455 | /* | |
1456 | * Setup the fabric API of function pointers used by target_core_mod | |
1457 | */ | |
1458 | fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; | |
1459 | fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; | |
1460 | fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; | |
1461 | fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; | |
1462 | fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; | |
1463 | fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; | |
1464 | fabric->tf_ops.tpg_get_pr_transport_id_len = | |
1465 | &tcm_loop_get_pr_transport_id_len; | |
1466 | fabric->tf_ops.tpg_parse_pr_out_transport_id = | |
1467 | &tcm_loop_parse_pr_out_transport_id; | |
1468 | fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; | |
1469 | fabric->tf_ops.tpg_check_demo_mode_cache = | |
1470 | &tcm_loop_check_demo_mode_cache; | |
1471 | fabric->tf_ops.tpg_check_demo_mode_write_protect = | |
1472 | &tcm_loop_check_demo_mode_write_protect; | |
1473 | fabric->tf_ops.tpg_check_prod_mode_write_protect = | |
1474 | &tcm_loop_check_prod_mode_write_protect; | |
1475 | /* | |
1476 | * The TCM loopback fabric module runs in demo-mode to a local | |
1477 | * virtual SCSI device, so fabric dependent initator ACLs are | |
1478 | * not required. | |
1479 | */ | |
1480 | fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; | |
1481 | fabric->tf_ops.tpg_release_fabric_acl = | |
1482 | &tcm_loop_tpg_release_fabric_acl; | |
1483 | fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; | |
3703b2c5 NB |
1484 | /* |
1485 | * Used for setting up remaining TCM resources in process context | |
1486 | */ | |
3703b2c5 | 1487 | fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; |
35462975 | 1488 | fabric->tf_ops.release_cmd = &tcm_loop_release_cmd; |
3703b2c5 NB |
1489 | fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; |
1490 | fabric->tf_ops.close_session = &tcm_loop_close_session; | |
3703b2c5 NB |
1491 | fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; |
1492 | fabric->tf_ops.sess_get_initiator_sid = NULL; | |
1493 | fabric->tf_ops.write_pending = &tcm_loop_write_pending; | |
1494 | fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; | |
1495 | /* | |
1496 | * Not used for TCM loopback | |
1497 | */ | |
1498 | fabric->tf_ops.set_default_node_attributes = | |
1499 | &tcm_loop_set_default_node_attributes; | |
1500 | fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; | |
1501 | fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; | |
3703b2c5 NB |
1502 | fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; |
1503 | fabric->tf_ops.queue_status = &tcm_loop_queue_status; | |
1504 | fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; | |
131e6abc | 1505 | fabric->tf_ops.aborted_task = &tcm_loop_aborted_task; |
3703b2c5 | 1506 | |
3703b2c5 NB |
1507 | /* |
1508 | * Setup function pointers for generic logic in target_core_fabric_configfs.c | |
1509 | */ | |
1510 | fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; | |
1511 | fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; | |
1512 | fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; | |
1513 | fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; | |
1514 | /* | |
1515 | * fabric_post_link() and fabric_pre_unlink() are used for | |
1516 | * registration and release of TCM Loop Virtual SCSI LUNs. | |
1517 | */ | |
1518 | fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; | |
1519 | fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; | |
1520 | fabric->tf_ops.fabric_make_np = NULL; | |
1521 | fabric->tf_ops.fabric_drop_np = NULL; | |
1522 | /* | |
1523 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
1524 | */ | |
d80e224d AG |
1525 | fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; |
1526 | fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; | |
1527 | fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL; | |
1528 | fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL; | |
1529 | fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL; | |
3703b2c5 NB |
1530 | /* |
1531 | * Once fabric->tf_ops has been setup, now register the fabric for | |
1532 | * use within TCM | |
1533 | */ | |
1534 | ret = target_fabric_configfs_register(fabric); | |
1535 | if (ret < 0) { | |
6708bb27 | 1536 | pr_err("target_fabric_configfs_register() for" |
3703b2c5 NB |
1537 | " TCM_Loop failed!\n"); |
1538 | target_fabric_configfs_free(fabric); | |
1539 | return -1; | |
1540 | } | |
1541 | /* | |
1542 | * Setup our local pointer to *fabric. | |
1543 | */ | |
1544 | tcm_loop_fabric_configfs = fabric; | |
6708bb27 | 1545 | pr_debug("TCM_LOOP[0] - Set fabric ->" |
3703b2c5 NB |
1546 | " tcm_loop_fabric_configfs\n"); |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | static void tcm_loop_deregister_configfs(void) | |
1551 | { | |
1552 | if (!tcm_loop_fabric_configfs) | |
1553 | return; | |
1554 | ||
1555 | target_fabric_configfs_deregister(tcm_loop_fabric_configfs); | |
1556 | tcm_loop_fabric_configfs = NULL; | |
6708bb27 | 1557 | pr_debug("TCM_LOOP[0] - Cleared" |
3703b2c5 NB |
1558 | " tcm_loop_fabric_configfs\n"); |
1559 | } | |
1560 | ||
1561 | static int __init tcm_loop_fabric_init(void) | |
1562 | { | |
afe2cb7f CH |
1563 | int ret = -ENOMEM; |
1564 | ||
1565 | tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0); | |
1566 | if (!tcm_loop_workqueue) | |
1567 | goto out; | |
3703b2c5 NB |
1568 | |
1569 | tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", | |
1570 | sizeof(struct tcm_loop_cmd), | |
1571 | __alignof__(struct tcm_loop_cmd), | |
1572 | 0, NULL); | |
1573 | if (!tcm_loop_cmd_cache) { | |
6708bb27 | 1574 | pr_debug("kmem_cache_create() for" |
3703b2c5 | 1575 | " tcm_loop_cmd_cache failed\n"); |
afe2cb7f | 1576 | goto out_destroy_workqueue; |
3703b2c5 NB |
1577 | } |
1578 | ||
1579 | ret = tcm_loop_alloc_core_bus(); | |
1580 | if (ret) | |
afe2cb7f | 1581 | goto out_destroy_cache; |
3703b2c5 NB |
1582 | |
1583 | ret = tcm_loop_register_configfs(); | |
afe2cb7f CH |
1584 | if (ret) |
1585 | goto out_release_core_bus; | |
3703b2c5 NB |
1586 | |
1587 | return 0; | |
afe2cb7f CH |
1588 | |
1589 | out_release_core_bus: | |
1590 | tcm_loop_release_core_bus(); | |
1591 | out_destroy_cache: | |
1592 | kmem_cache_destroy(tcm_loop_cmd_cache); | |
1593 | out_destroy_workqueue: | |
1594 | destroy_workqueue(tcm_loop_workqueue); | |
1595 | out: | |
1596 | return ret; | |
3703b2c5 NB |
1597 | } |
1598 | ||
1599 | static void __exit tcm_loop_fabric_exit(void) | |
1600 | { | |
1601 | tcm_loop_deregister_configfs(); | |
1602 | tcm_loop_release_core_bus(); | |
1603 | kmem_cache_destroy(tcm_loop_cmd_cache); | |
afe2cb7f | 1604 | destroy_workqueue(tcm_loop_workqueue); |
3703b2c5 NB |
1605 | } |
1606 | ||
1607 | MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); | |
1608 | MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); | |
1609 | MODULE_LICENSE("GPL"); | |
1610 | module_init(tcm_loop_fabric_init); | |
1611 | module_exit(tcm_loop_fabric_exit); |