Commit | Line | Data |
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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 | ||
afe2cb7f | 113 | static void tcm_loop_submission_work(struct work_struct *work) |
3703b2c5 | 114 | { |
afe2cb7f CH |
115 | struct tcm_loop_cmd *tl_cmd = |
116 | container_of(work, struct tcm_loop_cmd, work); | |
117 | struct se_cmd *se_cmd = &tl_cmd->tl_se_cmd; | |
118 | struct scsi_cmnd *sc = tl_cmd->sc; | |
119 | struct tcm_loop_nexus *tl_nexus; | |
3703b2c5 NB |
120 | struct tcm_loop_hba *tl_hba; |
121 | struct tcm_loop_tpg *tl_tpg; | |
16786454 | 122 | struct scatterlist *sgl_bidi = NULL; |
e2a4f55c | 123 | u32 sgl_bidi_count = 0, transfer_length; |
8f9f44f8 | 124 | int rc; |
3703b2c5 | 125 | |
3703b2c5 NB |
126 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); |
127 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; | |
afe2cb7f | 128 | |
0a020436 NB |
129 | /* |
130 | * Ensure that this tl_tpg reference from the incoming sc->device->id | |
131 | * has already been configured via tcm_loop_make_naa_tpg(). | |
132 | */ | |
133 | if (!tl_tpg->tl_hba) { | |
134 | set_host_byte(sc, DID_NO_CONNECT); | |
f872c9f4 | 135 | goto out_done; |
0a020436 | 136 | } |
fb2b2844 HR |
137 | if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) { |
138 | set_host_byte(sc, DID_TRANSPORT_DISRUPTED); | |
139 | goto out_done; | |
140 | } | |
506787a2 | 141 | tl_nexus = tl_tpg->tl_nexus; |
f872c9f4 CH |
142 | if (!tl_nexus) { |
143 | scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" | |
144 | " does not exist\n"); | |
145 | set_host_byte(sc, DID_ERROR); | |
146 | goto out_done; | |
3703b2c5 | 147 | } |
16786454 CH |
148 | if (scsi_bidi_cmnd(sc)) { |
149 | struct scsi_data_buffer *sdb = scsi_in(sc); | |
150 | ||
151 | sgl_bidi = sdb->table.sgl; | |
152 | sgl_bidi_count = sdb->table.nents; | |
f872c9f4 CH |
153 | se_cmd->se_cmd_flags |= SCF_BIDI; |
154 | ||
16786454 | 155 | } |
b5b8e298 | 156 | |
e2a4f55c SG |
157 | transfer_length = scsi_transfer_length(sc); |
158 | if (!scsi_prot_sg_count(sc) && | |
159 | scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) { | |
b5b8e298 | 160 | se_cmd->prot_pto = true; |
e2a4f55c SG |
161 | /* |
162 | * loopback transport doesn't support | |
163 | * WRITE_GENERATE, READ_STRIP protection | |
164 | * information operations, go ahead unprotected. | |
165 | */ | |
166 | transfer_length = scsi_bufflen(sc); | |
167 | } | |
b5b8e298 | 168 | |
8f9f44f8 NB |
169 | rc = target_submit_cmd_map_sgls(se_cmd, tl_nexus->se_sess, sc->cmnd, |
170 | &tl_cmd->tl_sense_buf[0], tl_cmd->sc->device->lun, | |
68d81f40 | 171 | transfer_length, TCM_SIMPLE_TAG, |
8f9f44f8 NB |
172 | sc->sc_data_direction, 0, |
173 | scsi_sglist(sc), scsi_sg_count(sc), | |
59dedde2 NB |
174 | sgl_bidi, sgl_bidi_count, |
175 | scsi_prot_sglist(sc), scsi_prot_sg_count(sc)); | |
8f9f44f8 | 176 | if (rc < 0) { |
f872c9f4 CH |
177 | set_host_byte(sc, DID_NO_CONNECT); |
178 | goto out_done; | |
179 | } | |
afe2cb7f | 180 | return; |
f872c9f4 CH |
181 | |
182 | out_done: | |
b43f1886 | 183 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); |
f872c9f4 | 184 | sc->scsi_done(sc); |
afe2cb7f CH |
185 | return; |
186 | } | |
187 | ||
188 | /* | |
189 | * ->queuecommand can be and usually is called from interrupt context, so | |
190 | * defer the actual submission to a workqueue. | |
191 | */ | |
192 | static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) | |
193 | { | |
194 | struct tcm_loop_cmd *tl_cmd; | |
195 | ||
9cb78c16 | 196 | pr_debug("tcm_loop_queuecommand() %d:%d:%d:%llu got CDB: 0x%02x" |
afe2cb7f CH |
197 | " scsi_buf_len: %u\n", sc->device->host->host_no, |
198 | sc->device->id, sc->device->channel, sc->device->lun, | |
199 | sc->cmnd[0], scsi_bufflen(sc)); | |
200 | ||
201 | tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC); | |
202 | if (!tl_cmd) { | |
203 | pr_err("Unable to allocate struct tcm_loop_cmd\n"); | |
204 | set_host_byte(sc, DID_ERROR); | |
205 | sc->scsi_done(sc); | |
206 | return 0; | |
207 | } | |
208 | ||
209 | tl_cmd->sc = sc; | |
6375f890 | 210 | tl_cmd->sc_cmd_tag = sc->request->tag; |
afe2cb7f CH |
211 | INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); |
212 | queue_work(tcm_loop_workqueue, &tl_cmd->work); | |
f872c9f4 | 213 | return 0; |
3703b2c5 NB |
214 | } |
215 | ||
216 | /* | |
217 | * Called from SCSI EH process context to issue a LUN_RESET TMR | |
218 | * to struct scsi_device | |
219 | */ | |
a314d700 | 220 | static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, |
969871cd | 221 | int lun, int task, enum tcm_tmreq_table tmr) |
3703b2c5 NB |
222 | { |
223 | struct se_cmd *se_cmd = NULL; | |
3703b2c5 | 224 | struct se_session *se_sess; |
a314d700 | 225 | struct se_portal_group *se_tpg; |
506787a2 | 226 | struct tcm_loop_nexus *tl_nexus; |
3703b2c5 | 227 | struct tcm_loop_cmd *tl_cmd = NULL; |
3703b2c5 | 228 | struct tcm_loop_tmr *tl_tmr = NULL; |
a314d700 | 229 | int ret = TMR_FUNCTION_FAILED, rc; |
3703b2c5 | 230 | |
506787a2 HR |
231 | /* |
232 | * Locate the tl_nexus and se_sess pointers | |
233 | */ | |
234 | tl_nexus = tl_tpg->tl_nexus; | |
235 | if (!tl_nexus) { | |
236 | pr_err("Unable to perform device reset without" | |
237 | " active I_T Nexus\n"); | |
238 | return ret; | |
239 | } | |
240 | ||
3703b2c5 NB |
241 | tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL); |
242 | if (!tl_cmd) { | |
6708bb27 | 243 | pr_err("Unable to allocate memory for tl_cmd\n"); |
a314d700 | 244 | return ret; |
3703b2c5 NB |
245 | } |
246 | ||
247 | tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL); | |
248 | if (!tl_tmr) { | |
6708bb27 | 249 | pr_err("Unable to allocate memory for tl_tmr\n"); |
3703b2c5 NB |
250 | goto release; |
251 | } | |
252 | init_waitqueue_head(&tl_tmr->tl_tmr_wait); | |
253 | ||
254 | se_cmd = &tl_cmd->tl_se_cmd; | |
a314d700 | 255 | se_tpg = &tl_tpg->tl_se_tpg; |
506787a2 | 256 | se_sess = tl_tpg->tl_nexus->se_sess; |
3703b2c5 NB |
257 | /* |
258 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
259 | */ | |
260 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0, | |
68d81f40 | 261 | DMA_NONE, TCM_SIMPLE_TAG, |
3703b2c5 | 262 | &tl_cmd->tl_sense_buf[0]); |
c8e31f26 | 263 | |
a314d700 | 264 | rc = core_tmr_alloc_req(se_cmd, tl_tmr, tmr, GFP_KERNEL); |
c8e31f26 | 265 | if (rc < 0) |
3703b2c5 | 266 | goto release; |
a314d700 | 267 | |
969871cd HR |
268 | if (tmr == TMR_ABORT_TASK) |
269 | se_cmd->se_tmr_req->ref_task_tag = task; | |
270 | ||
3703b2c5 | 271 | /* |
a314d700 | 272 | * Locate the underlying TCM struct se_lun |
3703b2c5 | 273 | */ |
a314d700 HR |
274 | if (transport_lookup_tmr_lun(se_cmd, lun) < 0) { |
275 | ret = TMR_LUN_DOES_NOT_EXIST; | |
3703b2c5 | 276 | goto release; |
a314d700 | 277 | } |
3703b2c5 | 278 | /* |
a314d700 HR |
279 | * Queue the TMR to TCM Core and sleep waiting for |
280 | * tcm_loop_queue_tm_rsp() to wake us up. | |
3703b2c5 NB |
281 | */ |
282 | transport_generic_handle_tmr(se_cmd); | |
283 | wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete)); | |
284 | /* | |
285 | * The TMR LUN_RESET has completed, check the response status and | |
286 | * then release allocations. | |
287 | */ | |
a314d700 | 288 | ret = se_cmd->se_tmr_req->response; |
3703b2c5 NB |
289 | release: |
290 | if (se_cmd) | |
82f1c8a4 | 291 | transport_generic_free_cmd(se_cmd, 1); |
3703b2c5 NB |
292 | else |
293 | kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); | |
294 | kfree(tl_tmr); | |
295 | return ret; | |
296 | } | |
297 | ||
969871cd HR |
298 | static int tcm_loop_abort_task(struct scsi_cmnd *sc) |
299 | { | |
300 | struct tcm_loop_hba *tl_hba; | |
969871cd HR |
301 | struct tcm_loop_tpg *tl_tpg; |
302 | int ret = FAILED; | |
303 | ||
304 | /* | |
305 | * Locate the tcm_loop_hba_t pointer | |
306 | */ | |
307 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); | |
969871cd | 308 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; |
506787a2 | 309 | ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun, |
6375f890 | 310 | sc->request->tag, TMR_ABORT_TASK); |
969871cd HR |
311 | return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; |
312 | } | |
313 | ||
a314d700 HR |
314 | /* |
315 | * Called from SCSI EH process context to issue a LUN_RESET TMR | |
316 | * to struct scsi_device | |
317 | */ | |
318 | static int tcm_loop_device_reset(struct scsi_cmnd *sc) | |
319 | { | |
320 | struct tcm_loop_hba *tl_hba; | |
a314d700 HR |
321 | struct tcm_loop_tpg *tl_tpg; |
322 | int ret = FAILED; | |
323 | ||
324 | /* | |
325 | * Locate the tcm_loop_hba_t pointer | |
326 | */ | |
327 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); | |
a314d700 | 328 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; |
506787a2 HR |
329 | |
330 | ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun, | |
969871cd | 331 | 0, TMR_LUN_RESET); |
a314d700 HR |
332 | return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; |
333 | } | |
334 | ||
8f4a1fb0 HR |
335 | static int tcm_loop_target_reset(struct scsi_cmnd *sc) |
336 | { | |
337 | struct tcm_loop_hba *tl_hba; | |
338 | struct tcm_loop_tpg *tl_tpg; | |
339 | ||
340 | /* | |
341 | * Locate the tcm_loop_hba_t pointer | |
342 | */ | |
343 | tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); | |
344 | if (!tl_hba) { | |
345 | pr_err("Unable to perform device reset without" | |
346 | " active I_T Nexus\n"); | |
347 | return FAILED; | |
348 | } | |
349 | /* | |
350 | * Locate the tl_tpg pointer from TargetID in sc->device->id | |
351 | */ | |
352 | tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; | |
353 | if (tl_tpg) { | |
354 | tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; | |
355 | return SUCCESS; | |
356 | } | |
357 | return FAILED; | |
358 | } | |
359 | ||
3703b2c5 NB |
360 | static int tcm_loop_slave_alloc(struct scsi_device *sd) |
361 | { | |
362 | set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags); | |
363 | return 0; | |
364 | } | |
365 | ||
3703b2c5 | 366 | static struct scsi_host_template tcm_loop_driver_template = { |
8946b077 | 367 | .show_info = tcm_loop_show_info, |
3703b2c5 NB |
368 | .proc_name = "tcm_loopback", |
369 | .name = "TCM_Loopback", | |
370 | .queuecommand = tcm_loop_queuecommand, | |
db5ed4df | 371 | .change_queue_depth = scsi_change_queue_depth, |
969871cd | 372 | .eh_abort_handler = tcm_loop_abort_task, |
3703b2c5 | 373 | .eh_device_reset_handler = tcm_loop_device_reset, |
8f4a1fb0 | 374 | .eh_target_reset_handler = tcm_loop_target_reset, |
2e88efd3 | 375 | .can_queue = 1024, |
3703b2c5 | 376 | .this_id = -1, |
2e88efd3 CH |
377 | .sg_tablesize = 256, |
378 | .cmd_per_lun = 1024, | |
379 | .max_sectors = 0xFFFF, | |
3703b2c5 NB |
380 | .use_clustering = DISABLE_CLUSTERING, |
381 | .slave_alloc = tcm_loop_slave_alloc, | |
3703b2c5 | 382 | .module = THIS_MODULE, |
2ecb204d | 383 | .use_blk_tags = 1, |
c40ecc12 | 384 | .track_queue_depth = 1, |
3703b2c5 NB |
385 | }; |
386 | ||
387 | static int tcm_loop_driver_probe(struct device *dev) | |
388 | { | |
389 | struct tcm_loop_hba *tl_hba; | |
390 | struct Scsi_Host *sh; | |
59dedde2 | 391 | int error, host_prot; |
3703b2c5 NB |
392 | |
393 | tl_hba = to_tcm_loop_hba(dev); | |
394 | ||
395 | sh = scsi_host_alloc(&tcm_loop_driver_template, | |
396 | sizeof(struct tcm_loop_hba)); | |
397 | if (!sh) { | |
6708bb27 | 398 | pr_err("Unable to allocate struct scsi_host\n"); |
3703b2c5 NB |
399 | return -ENODEV; |
400 | } | |
401 | tl_hba->sh = sh; | |
402 | ||
403 | /* | |
404 | * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata | |
405 | */ | |
406 | *((struct tcm_loop_hba **)sh->hostdata) = tl_hba; | |
407 | /* | |
408 | * Setup single ID, Channel and LUN for now.. | |
409 | */ | |
410 | sh->max_id = 2; | |
411 | sh->max_lun = 0; | |
412 | sh->max_channel = 0; | |
413 | sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN; | |
414 | ||
59dedde2 NB |
415 | host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION | |
416 | SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION | | |
417 | SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION; | |
418 | ||
419 | scsi_host_set_prot(sh, host_prot); | |
420 | scsi_host_set_guard(sh, SHOST_DIX_GUARD_CRC); | |
421 | ||
3703b2c5 NB |
422 | error = scsi_add_host(sh, &tl_hba->dev); |
423 | if (error) { | |
6708bb27 | 424 | pr_err("%s: scsi_add_host failed\n", __func__); |
3703b2c5 NB |
425 | scsi_host_put(sh); |
426 | return -ENODEV; | |
427 | } | |
428 | return 0; | |
429 | } | |
430 | ||
431 | static int tcm_loop_driver_remove(struct device *dev) | |
432 | { | |
433 | struct tcm_loop_hba *tl_hba; | |
434 | struct Scsi_Host *sh; | |
435 | ||
436 | tl_hba = to_tcm_loop_hba(dev); | |
437 | sh = tl_hba->sh; | |
438 | ||
439 | scsi_remove_host(sh); | |
440 | scsi_host_put(sh); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | static void tcm_loop_release_adapter(struct device *dev) | |
445 | { | |
446 | struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev); | |
447 | ||
448 | kfree(tl_hba); | |
449 | } | |
450 | ||
451 | /* | |
452 | * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c | |
453 | */ | |
454 | static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id) | |
455 | { | |
456 | int ret; | |
457 | ||
458 | tl_hba->dev.bus = &tcm_loop_lld_bus; | |
459 | tl_hba->dev.parent = tcm_loop_primary; | |
460 | tl_hba->dev.release = &tcm_loop_release_adapter; | |
461 | dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id); | |
462 | ||
463 | ret = device_register(&tl_hba->dev); | |
464 | if (ret) { | |
6708bb27 | 465 | pr_err("device_register() failed for" |
3703b2c5 NB |
466 | " tl_hba->dev: %d\n", ret); |
467 | return -ENODEV; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /* | |
474 | * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated | |
475 | * tcm_loop SCSI bus. | |
476 | */ | |
477 | static int tcm_loop_alloc_core_bus(void) | |
478 | { | |
479 | int ret; | |
480 | ||
481 | tcm_loop_primary = root_device_register("tcm_loop_0"); | |
482 | if (IS_ERR(tcm_loop_primary)) { | |
6708bb27 | 483 | pr_err("Unable to allocate tcm_loop_primary\n"); |
3703b2c5 NB |
484 | return PTR_ERR(tcm_loop_primary); |
485 | } | |
486 | ||
487 | ret = bus_register(&tcm_loop_lld_bus); | |
488 | if (ret) { | |
6708bb27 | 489 | pr_err("bus_register() failed for tcm_loop_lld_bus\n"); |
3703b2c5 NB |
490 | goto dev_unreg; |
491 | } | |
492 | ||
493 | ret = driver_register(&tcm_loop_driverfs); | |
494 | if (ret) { | |
6708bb27 | 495 | pr_err("driver_register() failed for" |
3703b2c5 NB |
496 | "tcm_loop_driverfs\n"); |
497 | goto bus_unreg; | |
498 | } | |
499 | ||
6708bb27 | 500 | pr_debug("Initialized TCM Loop Core Bus\n"); |
3703b2c5 NB |
501 | return ret; |
502 | ||
503 | bus_unreg: | |
504 | bus_unregister(&tcm_loop_lld_bus); | |
505 | dev_unreg: | |
506 | root_device_unregister(tcm_loop_primary); | |
507 | return ret; | |
508 | } | |
509 | ||
510 | static void tcm_loop_release_core_bus(void) | |
511 | { | |
512 | driver_unregister(&tcm_loop_driverfs); | |
513 | bus_unregister(&tcm_loop_lld_bus); | |
514 | root_device_unregister(tcm_loop_primary); | |
515 | ||
6708bb27 | 516 | pr_debug("Releasing TCM Loop Core BUS\n"); |
3703b2c5 NB |
517 | } |
518 | ||
519 | static char *tcm_loop_get_fabric_name(void) | |
520 | { | |
521 | return "loopback"; | |
522 | } | |
523 | ||
524 | static u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg) | |
525 | { | |
8359cf43 | 526 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
527 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
528 | /* | |
529 | * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba() | |
530 | * time based on the protocol dependent prefix of the passed configfs group. | |
531 | * | |
532 | * Based upon tl_proto_id, TCM_Loop emulates the requested fabric | |
533 | * ProtocolID using target_core_fabric_lib.c symbols. | |
534 | */ | |
535 | switch (tl_hba->tl_proto_id) { | |
536 | case SCSI_PROTOCOL_SAS: | |
537 | return sas_get_fabric_proto_ident(se_tpg); | |
538 | case SCSI_PROTOCOL_FCP: | |
539 | return fc_get_fabric_proto_ident(se_tpg); | |
540 | case SCSI_PROTOCOL_ISCSI: | |
541 | return iscsi_get_fabric_proto_ident(se_tpg); | |
542 | default: | |
6708bb27 | 543 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
544 | " SAS emulation\n", tl_hba->tl_proto_id); |
545 | break; | |
546 | } | |
547 | ||
548 | return sas_get_fabric_proto_ident(se_tpg); | |
549 | } | |
550 | ||
551 | static char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg) | |
552 | { | |
8359cf43 | 553 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
554 | /* |
555 | * Return the passed NAA identifier for the SAS Target Port | |
556 | */ | |
557 | return &tl_tpg->tl_hba->tl_wwn_address[0]; | |
558 | } | |
559 | ||
560 | static u16 tcm_loop_get_tag(struct se_portal_group *se_tpg) | |
561 | { | |
8359cf43 | 562 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
563 | /* |
564 | * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83 | |
565 | * to represent the SCSI Target Port. | |
566 | */ | |
567 | return tl_tpg->tl_tpgt; | |
568 | } | |
569 | ||
570 | static u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg) | |
571 | { | |
572 | return 1; | |
573 | } | |
574 | ||
575 | static u32 tcm_loop_get_pr_transport_id( | |
576 | struct se_portal_group *se_tpg, | |
577 | struct se_node_acl *se_nacl, | |
578 | struct t10_pr_registration *pr_reg, | |
579 | int *format_code, | |
580 | unsigned char *buf) | |
581 | { | |
8359cf43 | 582 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
583 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
584 | ||
585 | switch (tl_hba->tl_proto_id) { | |
586 | case SCSI_PROTOCOL_SAS: | |
587 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
588 | format_code, buf); | |
589 | case SCSI_PROTOCOL_FCP: | |
590 | return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
591 | format_code, buf); | |
592 | case SCSI_PROTOCOL_ISCSI: | |
593 | return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
594 | format_code, buf); | |
595 | default: | |
6708bb27 | 596 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
597 | " SAS emulation\n", tl_hba->tl_proto_id); |
598 | break; | |
599 | } | |
600 | ||
601 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
602 | format_code, buf); | |
603 | } | |
604 | ||
605 | static u32 tcm_loop_get_pr_transport_id_len( | |
606 | struct se_portal_group *se_tpg, | |
607 | struct se_node_acl *se_nacl, | |
608 | struct t10_pr_registration *pr_reg, | |
609 | int *format_code) | |
610 | { | |
8359cf43 | 611 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
612 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
613 | ||
614 | switch (tl_hba->tl_proto_id) { | |
615 | case SCSI_PROTOCOL_SAS: | |
616 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
617 | format_code); | |
618 | case SCSI_PROTOCOL_FCP: | |
619 | return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
620 | format_code); | |
621 | case SCSI_PROTOCOL_ISCSI: | |
622 | return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
623 | format_code); | |
624 | default: | |
6708bb27 | 625 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
626 | " SAS emulation\n", tl_hba->tl_proto_id); |
627 | break; | |
628 | } | |
629 | ||
630 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
631 | format_code); | |
632 | } | |
633 | ||
634 | /* | |
635 | * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above | |
636 | * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. | |
637 | */ | |
638 | static char *tcm_loop_parse_pr_out_transport_id( | |
639 | struct se_portal_group *se_tpg, | |
640 | const char *buf, | |
641 | u32 *out_tid_len, | |
642 | char **port_nexus_ptr) | |
643 | { | |
8359cf43 | 644 | struct tcm_loop_tpg *tl_tpg = se_tpg->se_tpg_fabric_ptr; |
3703b2c5 NB |
645 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; |
646 | ||
647 | switch (tl_hba->tl_proto_id) { | |
648 | case SCSI_PROTOCOL_SAS: | |
649 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
650 | port_nexus_ptr); | |
651 | case SCSI_PROTOCOL_FCP: | |
652 | return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
653 | port_nexus_ptr); | |
654 | case SCSI_PROTOCOL_ISCSI: | |
655 | return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
656 | port_nexus_ptr); | |
657 | default: | |
6708bb27 | 658 | pr_err("Unknown tl_proto_id: 0x%02x, using" |
3703b2c5 NB |
659 | " SAS emulation\n", tl_hba->tl_proto_id); |
660 | break; | |
661 | } | |
662 | ||
663 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
664 | port_nexus_ptr); | |
665 | } | |
666 | ||
667 | /* | |
668 | * Returning (1) here allows for target_core_mod struct se_node_acl to be generated | |
669 | * based upon the incoming fabric dependent SCSI Initiator Port | |
670 | */ | |
671 | static int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg) | |
672 | { | |
673 | return 1; | |
674 | } | |
675 | ||
676 | static int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg) | |
677 | { | |
678 | return 0; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for | |
683 | * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest | |
684 | */ | |
685 | static int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg) | |
686 | { | |
687 | return 0; | |
688 | } | |
689 | ||
690 | /* | |
691 | * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will | |
692 | * never be called for TCM_Loop by target_core_fabric_configfs.c code. | |
693 | * It has been added here as a nop for target_fabric_tf_ops_check() | |
694 | */ | |
695 | static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg) | |
696 | { | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( | |
701 | struct se_portal_group *se_tpg) | |
702 | { | |
703 | struct tcm_loop_nacl *tl_nacl; | |
704 | ||
705 | tl_nacl = kzalloc(sizeof(struct tcm_loop_nacl), GFP_KERNEL); | |
706 | if (!tl_nacl) { | |
6708bb27 | 707 | pr_err("Unable to allocate struct tcm_loop_nacl\n"); |
3703b2c5 NB |
708 | return NULL; |
709 | } | |
710 | ||
711 | return &tl_nacl->se_node_acl; | |
712 | } | |
713 | ||
714 | static void tcm_loop_tpg_release_fabric_acl( | |
715 | struct se_portal_group *se_tpg, | |
716 | struct se_node_acl *se_nacl) | |
717 | { | |
718 | struct tcm_loop_nacl *tl_nacl = container_of(se_nacl, | |
719 | struct tcm_loop_nacl, se_node_acl); | |
720 | ||
721 | kfree(tl_nacl); | |
722 | } | |
723 | ||
724 | static u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg) | |
725 | { | |
726 | return 1; | |
727 | } | |
728 | ||
3703b2c5 NB |
729 | static u32 tcm_loop_sess_get_index(struct se_session *se_sess) |
730 | { | |
731 | return 1; | |
732 | } | |
733 | ||
734 | static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) | |
735 | { | |
736 | return; | |
737 | } | |
738 | ||
739 | static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) | |
740 | { | |
969871cd HR |
741 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, |
742 | struct tcm_loop_cmd, tl_se_cmd); | |
743 | ||
744 | return tl_cmd->sc_cmd_tag; | |
3703b2c5 NB |
745 | } |
746 | ||
747 | static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) | |
748 | { | |
749 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
750 | struct tcm_loop_cmd, tl_se_cmd); | |
751 | ||
752 | return tl_cmd->sc_cmd_state; | |
753 | } | |
754 | ||
755 | static int tcm_loop_shutdown_session(struct se_session *se_sess) | |
756 | { | |
757 | return 0; | |
758 | } | |
759 | ||
760 | static void tcm_loop_close_session(struct se_session *se_sess) | |
761 | { | |
762 | return; | |
763 | }; | |
764 | ||
3703b2c5 NB |
765 | static int tcm_loop_write_pending(struct se_cmd *se_cmd) |
766 | { | |
767 | /* | |
768 | * Since Linux/SCSI has already sent down a struct scsi_cmnd | |
769 | * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array | |
770 | * memory, and memory has already been mapped to struct se_cmd->t_mem_list | |
771 | * format with transport_generic_map_mem_to_cmd(). | |
772 | * | |
773 | * We now tell TCM to add this WRITE CDB directly into the TCM storage | |
774 | * object execution queue. | |
775 | */ | |
70baf0ab | 776 | target_execute_cmd(se_cmd); |
3703b2c5 NB |
777 | return 0; |
778 | } | |
779 | ||
780 | static int tcm_loop_write_pending_status(struct se_cmd *se_cmd) | |
781 | { | |
782 | return 0; | |
783 | } | |
784 | ||
785 | static int tcm_loop_queue_data_in(struct se_cmd *se_cmd) | |
786 | { | |
787 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
788 | struct tcm_loop_cmd, tl_se_cmd); | |
789 | struct scsi_cmnd *sc = tl_cmd->sc; | |
790 | ||
6708bb27 | 791 | pr_debug("tcm_loop_queue_data_in() called for scsi_cmnd: %p" |
3703b2c5 NB |
792 | " cdb: 0x%02x\n", sc, sc->cmnd[0]); |
793 | ||
794 | sc->result = SAM_STAT_GOOD; | |
795 | set_host_byte(sc, DID_OK); | |
6cf3fa69 RD |
796 | if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || |
797 | (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) | |
798 | scsi_set_resid(sc, se_cmd->residual_count); | |
3703b2c5 NB |
799 | sc->scsi_done(sc); |
800 | return 0; | |
801 | } | |
802 | ||
803 | static int tcm_loop_queue_status(struct se_cmd *se_cmd) | |
804 | { | |
805 | struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, | |
806 | struct tcm_loop_cmd, tl_se_cmd); | |
807 | struct scsi_cmnd *sc = tl_cmd->sc; | |
808 | ||
6708bb27 | 809 | pr_debug("tcm_loop_queue_status() called for scsi_cmnd: %p" |
3703b2c5 NB |
810 | " cdb: 0x%02x\n", sc, sc->cmnd[0]); |
811 | ||
812 | if (se_cmd->sense_buffer && | |
813 | ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
814 | (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
815 | ||
5951146d | 816 | memcpy(sc->sense_buffer, se_cmd->sense_buffer, |
3703b2c5 NB |
817 | SCSI_SENSE_BUFFERSIZE); |
818 | sc->result = SAM_STAT_CHECK_CONDITION; | |
819 | set_driver_byte(sc, DRIVER_SENSE); | |
820 | } else | |
821 | sc->result = se_cmd->scsi_status; | |
822 | ||
823 | set_host_byte(sc, DID_OK); | |
6cf3fa69 RD |
824 | if ((se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) || |
825 | (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT)) | |
826 | scsi_set_resid(sc, se_cmd->residual_count); | |
3703b2c5 NB |
827 | sc->scsi_done(sc); |
828 | return 0; | |
829 | } | |
830 | ||
b79fafac | 831 | static void tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd) |
3703b2c5 NB |
832 | { |
833 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; | |
834 | struct tcm_loop_tmr *tl_tmr = se_tmr->fabric_tmr_ptr; | |
835 | /* | |
836 | * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead | |
837 | * and wake up the wait_queue_head_t in tcm_loop_device_reset() | |
838 | */ | |
839 | atomic_set(&tl_tmr->tmr_complete, 1); | |
840 | wake_up(&tl_tmr->tl_tmr_wait); | |
3703b2c5 NB |
841 | } |
842 | ||
131e6abc NB |
843 | static void tcm_loop_aborted_task(struct se_cmd *se_cmd) |
844 | { | |
845 | return; | |
846 | } | |
847 | ||
3703b2c5 NB |
848 | static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba) |
849 | { | |
850 | switch (tl_hba->tl_proto_id) { | |
851 | case SCSI_PROTOCOL_SAS: | |
852 | return "SAS"; | |
853 | case SCSI_PROTOCOL_FCP: | |
854 | return "FCP"; | |
855 | case SCSI_PROTOCOL_ISCSI: | |
856 | return "iSCSI"; | |
857 | default: | |
858 | break; | |
859 | } | |
860 | ||
861 | return "Unknown"; | |
862 | } | |
863 | ||
864 | /* Start items for tcm_loop_port_cit */ | |
865 | ||
866 | static int tcm_loop_port_link( | |
867 | struct se_portal_group *se_tpg, | |
868 | struct se_lun *lun) | |
869 | { | |
870 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
871 | struct tcm_loop_tpg, tl_se_tpg); | |
872 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; | |
873 | ||
33940d09 | 874 | atomic_inc_mb(&tl_tpg->tl_tpg_port_count); |
3703b2c5 NB |
875 | /* |
876 | * Add Linux/SCSI struct scsi_device by HCTL | |
877 | */ | |
878 | scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun); | |
879 | ||
6708bb27 | 880 | pr_debug("TCM_Loop_ConfigFS: Port Link Successful\n"); |
3703b2c5 NB |
881 | return 0; |
882 | } | |
883 | ||
884 | static void tcm_loop_port_unlink( | |
885 | struct se_portal_group *se_tpg, | |
886 | struct se_lun *se_lun) | |
887 | { | |
888 | struct scsi_device *sd; | |
889 | struct tcm_loop_hba *tl_hba; | |
890 | struct tcm_loop_tpg *tl_tpg; | |
891 | ||
892 | tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg); | |
893 | tl_hba = tl_tpg->tl_hba; | |
894 | ||
895 | sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt, | |
896 | se_lun->unpacked_lun); | |
897 | if (!sd) { | |
6708bb27 | 898 | pr_err("Unable to locate struct scsi_device for %d:%d:" |
3703b2c5 NB |
899 | "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun); |
900 | return; | |
901 | } | |
902 | /* | |
903 | * Remove Linux/SCSI struct scsi_device by HCTL | |
904 | */ | |
905 | scsi_remove_device(sd); | |
906 | scsi_device_put(sd); | |
907 | ||
33940d09 | 908 | atomic_dec_mb(&tl_tpg->tl_tpg_port_count); |
3703b2c5 | 909 | |
6708bb27 | 910 | pr_debug("TCM_Loop_ConfigFS: Port Unlink Successful\n"); |
3703b2c5 NB |
911 | } |
912 | ||
913 | /* End items for tcm_loop_port_cit */ | |
914 | ||
915 | /* Start items for tcm_loop_nexus_cit */ | |
916 | ||
917 | static int tcm_loop_make_nexus( | |
918 | struct tcm_loop_tpg *tl_tpg, | |
919 | const char *name) | |
920 | { | |
921 | struct se_portal_group *se_tpg; | |
922 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; | |
923 | struct tcm_loop_nexus *tl_nexus; | |
552523dc | 924 | int ret = -ENOMEM; |
3703b2c5 | 925 | |
506787a2 HR |
926 | if (tl_tpg->tl_nexus) { |
927 | pr_debug("tl_tpg->tl_nexus already exists\n"); | |
3703b2c5 NB |
928 | return -EEXIST; |
929 | } | |
930 | se_tpg = &tl_tpg->tl_se_tpg; | |
931 | ||
932 | tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL); | |
933 | if (!tl_nexus) { | |
6708bb27 | 934 | pr_err("Unable to allocate struct tcm_loop_nexus\n"); |
3703b2c5 NB |
935 | return -ENOMEM; |
936 | } | |
937 | /* | |
938 | * Initialize the struct se_session pointer | |
939 | */ | |
e70beee7 | 940 | tl_nexus->se_sess = transport_init_session(TARGET_PROT_ALL); |
552523dc DC |
941 | if (IS_ERR(tl_nexus->se_sess)) { |
942 | ret = PTR_ERR(tl_nexus->se_sess); | |
3703b2c5 | 943 | goto out; |
552523dc | 944 | } |
3703b2c5 NB |
945 | /* |
946 | * Since we are running in 'demo mode' this call with generate a | |
947 | * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI | |
948 | * Initiator port name of the passed configfs group 'name'. | |
949 | */ | |
950 | tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl( | |
951 | se_tpg, (unsigned char *)name); | |
952 | if (!tl_nexus->se_sess->se_node_acl) { | |
953 | transport_free_session(tl_nexus->se_sess); | |
954 | goto out; | |
955 | } | |
2f450cc1 BVA |
956 | /* Now, register the SAS I_T Nexus as active. */ |
957 | transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl, | |
5951146d | 958 | tl_nexus->se_sess, tl_nexus); |
506787a2 | 959 | tl_tpg->tl_nexus = tl_nexus; |
6708bb27 | 960 | pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated" |
3703b2c5 NB |
961 | " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba), |
962 | name); | |
963 | return 0; | |
964 | ||
965 | out: | |
966 | kfree(tl_nexus); | |
552523dc | 967 | return ret; |
3703b2c5 NB |
968 | } |
969 | ||
970 | static int tcm_loop_drop_nexus( | |
971 | struct tcm_loop_tpg *tpg) | |
972 | { | |
973 | struct se_session *se_sess; | |
974 | struct tcm_loop_nexus *tl_nexus; | |
3703b2c5 | 975 | |
506787a2 | 976 | tl_nexus = tpg->tl_nexus; |
3703b2c5 NB |
977 | if (!tl_nexus) |
978 | return -ENODEV; | |
979 | ||
980 | se_sess = tl_nexus->se_sess; | |
981 | if (!se_sess) | |
982 | return -ENODEV; | |
983 | ||
984 | if (atomic_read(&tpg->tl_tpg_port_count)) { | |
6708bb27 | 985 | pr_err("Unable to remove TCM_Loop I_T Nexus with" |
3703b2c5 NB |
986 | " active TPG port count: %d\n", |
987 | atomic_read(&tpg->tl_tpg_port_count)); | |
988 | return -EPERM; | |
989 | } | |
990 | ||
6708bb27 | 991 | pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated" |
506787a2 | 992 | " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tpg->tl_hba), |
3703b2c5 NB |
993 | tl_nexus->se_sess->se_node_acl->initiatorname); |
994 | /* | |
995 | * Release the SCSI I_T Nexus to the emulated SAS Target Port | |
996 | */ | |
997 | transport_deregister_session(tl_nexus->se_sess); | |
506787a2 | 998 | tpg->tl_nexus = NULL; |
3703b2c5 NB |
999 | kfree(tl_nexus); |
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | /* End items for tcm_loop_nexus_cit */ | |
1004 | ||
1005 | static ssize_t tcm_loop_tpg_show_nexus( | |
1006 | struct se_portal_group *se_tpg, | |
1007 | char *page) | |
1008 | { | |
1009 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1010 | struct tcm_loop_tpg, tl_se_tpg); | |
1011 | struct tcm_loop_nexus *tl_nexus; | |
1012 | ssize_t ret; | |
1013 | ||
506787a2 | 1014 | tl_nexus = tl_tpg->tl_nexus; |
3703b2c5 NB |
1015 | if (!tl_nexus) |
1016 | return -ENODEV; | |
1017 | ||
1018 | ret = snprintf(page, PAGE_SIZE, "%s\n", | |
1019 | tl_nexus->se_sess->se_node_acl->initiatorname); | |
1020 | ||
1021 | return ret; | |
1022 | } | |
1023 | ||
1024 | static ssize_t tcm_loop_tpg_store_nexus( | |
1025 | struct se_portal_group *se_tpg, | |
1026 | const char *page, | |
1027 | size_t count) | |
1028 | { | |
1029 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1030 | struct tcm_loop_tpg, tl_se_tpg); | |
1031 | struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba; | |
1032 | unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr; | |
1033 | int ret; | |
1034 | /* | |
1035 | * Shutdown the active I_T nexus if 'NULL' is passed.. | |
1036 | */ | |
1037 | if (!strncmp(page, "NULL", 4)) { | |
1038 | ret = tcm_loop_drop_nexus(tl_tpg); | |
1039 | return (!ret) ? count : ret; | |
1040 | } | |
1041 | /* | |
1042 | * Otherwise make sure the passed virtual Initiator port WWN matches | |
1043 | * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call | |
1044 | * tcm_loop_make_nexus() | |
1045 | */ | |
60d645a4 | 1046 | if (strlen(page) >= TL_WWN_ADDR_LEN) { |
6708bb27 | 1047 | pr_err("Emulated NAA Sas Address: %s, exceeds" |
3703b2c5 NB |
1048 | " max: %d\n", page, TL_WWN_ADDR_LEN); |
1049 | return -EINVAL; | |
1050 | } | |
1051 | snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page); | |
1052 | ||
1053 | ptr = strstr(i_port, "naa."); | |
1054 | if (ptr) { | |
1055 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) { | |
6708bb27 | 1056 | pr_err("Passed SAS Initiator Port %s does not" |
3703b2c5 NB |
1057 | " match target port protoid: %s\n", i_port, |
1058 | tcm_loop_dump_proto_id(tl_hba)); | |
1059 | return -EINVAL; | |
1060 | } | |
1061 | port_ptr = &i_port[0]; | |
1062 | goto check_newline; | |
1063 | } | |
1064 | ptr = strstr(i_port, "fc."); | |
1065 | if (ptr) { | |
1066 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) { | |
6708bb27 | 1067 | pr_err("Passed FCP Initiator Port %s does not" |
3703b2c5 NB |
1068 | " match target port protoid: %s\n", i_port, |
1069 | tcm_loop_dump_proto_id(tl_hba)); | |
1070 | return -EINVAL; | |
1071 | } | |
1072 | port_ptr = &i_port[3]; /* Skip over "fc." */ | |
1073 | goto check_newline; | |
1074 | } | |
1075 | ptr = strstr(i_port, "iqn."); | |
1076 | if (ptr) { | |
1077 | if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) { | |
6708bb27 | 1078 | pr_err("Passed iSCSI Initiator Port %s does not" |
3703b2c5 NB |
1079 | " match target port protoid: %s\n", i_port, |
1080 | tcm_loop_dump_proto_id(tl_hba)); | |
1081 | return -EINVAL; | |
1082 | } | |
1083 | port_ptr = &i_port[0]; | |
1084 | goto check_newline; | |
1085 | } | |
6708bb27 | 1086 | pr_err("Unable to locate prefix for emulated Initiator Port:" |
3703b2c5 NB |
1087 | " %s\n", i_port); |
1088 | return -EINVAL; | |
1089 | /* | |
1090 | * Clear any trailing newline for the NAA WWN | |
1091 | */ | |
1092 | check_newline: | |
1093 | if (i_port[strlen(i_port)-1] == '\n') | |
1094 | i_port[strlen(i_port)-1] = '\0'; | |
1095 | ||
1096 | ret = tcm_loop_make_nexus(tl_tpg, port_ptr); | |
1097 | if (ret < 0) | |
1098 | return ret; | |
1099 | ||
1100 | return count; | |
1101 | } | |
1102 | ||
1103 | TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); | |
1104 | ||
fb2b2844 HR |
1105 | static ssize_t tcm_loop_tpg_show_transport_status( |
1106 | struct se_portal_group *se_tpg, | |
1107 | char *page) | |
1108 | { | |
1109 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1110 | struct tcm_loop_tpg, tl_se_tpg); | |
1111 | const char *status = NULL; | |
1112 | ssize_t ret = -EINVAL; | |
1113 | ||
1114 | switch (tl_tpg->tl_transport_status) { | |
1115 | case TCM_TRANSPORT_ONLINE: | |
1116 | status = "online"; | |
1117 | break; | |
1118 | case TCM_TRANSPORT_OFFLINE: | |
1119 | status = "offline"; | |
1120 | break; | |
1121 | default: | |
1122 | break; | |
1123 | } | |
1124 | ||
1125 | if (status) | |
1126 | ret = snprintf(page, PAGE_SIZE, "%s\n", status); | |
1127 | ||
1128 | return ret; | |
1129 | } | |
1130 | ||
1131 | static ssize_t tcm_loop_tpg_store_transport_status( | |
1132 | struct se_portal_group *se_tpg, | |
1133 | const char *page, | |
1134 | size_t count) | |
1135 | { | |
1136 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1137 | struct tcm_loop_tpg, tl_se_tpg); | |
1138 | ||
1139 | if (!strncmp(page, "online", 6)) { | |
1140 | tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; | |
1141 | return count; | |
1142 | } | |
1143 | if (!strncmp(page, "offline", 7)) { | |
1144 | tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE; | |
1145 | return count; | |
1146 | } | |
1147 | return -EINVAL; | |
1148 | } | |
1149 | ||
1150 | TF_TPG_BASE_ATTR(tcm_loop, transport_status, S_IRUGO | S_IWUSR); | |
1151 | ||
3703b2c5 NB |
1152 | static struct configfs_attribute *tcm_loop_tpg_attrs[] = { |
1153 | &tcm_loop_tpg_nexus.attr, | |
fb2b2844 | 1154 | &tcm_loop_tpg_transport_status.attr, |
3703b2c5 NB |
1155 | NULL, |
1156 | }; | |
1157 | ||
1158 | /* Start items for tcm_loop_naa_cit */ | |
1159 | ||
f0a6c693 | 1160 | static struct se_portal_group *tcm_loop_make_naa_tpg( |
3703b2c5 NB |
1161 | struct se_wwn *wwn, |
1162 | struct config_group *group, | |
1163 | const char *name) | |
1164 | { | |
1165 | struct tcm_loop_hba *tl_hba = container_of(wwn, | |
1166 | struct tcm_loop_hba, tl_hba_wwn); | |
1167 | struct tcm_loop_tpg *tl_tpg; | |
1168 | char *tpgt_str, *end_ptr; | |
1169 | int ret; | |
1170 | unsigned short int tpgt; | |
1171 | ||
1172 | tpgt_str = strstr(name, "tpgt_"); | |
1173 | if (!tpgt_str) { | |
6708bb27 | 1174 | pr_err("Unable to locate \"tpgt_#\" directory" |
3703b2c5 NB |
1175 | " group\n"); |
1176 | return ERR_PTR(-EINVAL); | |
1177 | } | |
1178 | tpgt_str += 5; /* Skip ahead of "tpgt_" */ | |
1179 | tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0); | |
1180 | ||
12f09ccb | 1181 | if (tpgt >= TL_TPGS_PER_HBA) { |
6708bb27 | 1182 | pr_err("Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:" |
3703b2c5 NB |
1183 | " %u\n", tpgt, TL_TPGS_PER_HBA); |
1184 | return ERR_PTR(-EINVAL); | |
1185 | } | |
1186 | tl_tpg = &tl_hba->tl_hba_tpgs[tpgt]; | |
1187 | tl_tpg->tl_hba = tl_hba; | |
1188 | tl_tpg->tl_tpgt = tpgt; | |
1189 | /* | |
1190 | * Register the tl_tpg as a emulated SAS TCM Target Endpoint | |
1191 | */ | |
1192 | ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops, | |
5951146d | 1193 | wwn, &tl_tpg->tl_se_tpg, tl_tpg, |
3703b2c5 NB |
1194 | TRANSPORT_TPG_TYPE_NORMAL); |
1195 | if (ret < 0) | |
1196 | return ERR_PTR(-ENOMEM); | |
1197 | ||
6708bb27 | 1198 | pr_debug("TCM_Loop_ConfigFS: Allocated Emulated %s" |
3703b2c5 NB |
1199 | " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), |
1200 | config_item_name(&wwn->wwn_group.cg_item), tpgt); | |
1201 | ||
1202 | return &tl_tpg->tl_se_tpg; | |
1203 | } | |
1204 | ||
f0a6c693 | 1205 | static void tcm_loop_drop_naa_tpg( |
3703b2c5 NB |
1206 | struct se_portal_group *se_tpg) |
1207 | { | |
1208 | struct se_wwn *wwn = se_tpg->se_tpg_wwn; | |
1209 | struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, | |
1210 | struct tcm_loop_tpg, tl_se_tpg); | |
1211 | struct tcm_loop_hba *tl_hba; | |
1212 | unsigned short tpgt; | |
1213 | ||
1214 | tl_hba = tl_tpg->tl_hba; | |
1215 | tpgt = tl_tpg->tl_tpgt; | |
1216 | /* | |
1217 | * Release the I_T Nexus for the Virtual SAS link if present | |
1218 | */ | |
1219 | tcm_loop_drop_nexus(tl_tpg); | |
1220 | /* | |
1221 | * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint | |
1222 | */ | |
1223 | core_tpg_deregister(se_tpg); | |
1224 | ||
0a020436 NB |
1225 | tl_tpg->tl_hba = NULL; |
1226 | tl_tpg->tl_tpgt = 0; | |
1227 | ||
6708bb27 | 1228 | pr_debug("TCM_Loop_ConfigFS: Deallocated Emulated %s" |
3703b2c5 NB |
1229 | " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba), |
1230 | config_item_name(&wwn->wwn_group.cg_item), tpgt); | |
1231 | } | |
1232 | ||
1233 | /* End items for tcm_loop_naa_cit */ | |
1234 | ||
1235 | /* Start items for tcm_loop_cit */ | |
1236 | ||
f0a6c693 | 1237 | static struct se_wwn *tcm_loop_make_scsi_hba( |
3703b2c5 NB |
1238 | struct target_fabric_configfs *tf, |
1239 | struct config_group *group, | |
1240 | const char *name) | |
1241 | { | |
1242 | struct tcm_loop_hba *tl_hba; | |
1243 | struct Scsi_Host *sh; | |
1244 | char *ptr; | |
1245 | int ret, off = 0; | |
1246 | ||
1247 | tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL); | |
1248 | if (!tl_hba) { | |
6708bb27 | 1249 | pr_err("Unable to allocate struct tcm_loop_hba\n"); |
3703b2c5 NB |
1250 | return ERR_PTR(-ENOMEM); |
1251 | } | |
1252 | /* | |
1253 | * Determine the emulated Protocol Identifier and Target Port Name | |
1254 | * based on the incoming configfs directory name. | |
1255 | */ | |
1256 | ptr = strstr(name, "naa."); | |
1257 | if (ptr) { | |
1258 | tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS; | |
1259 | goto check_len; | |
1260 | } | |
1261 | ptr = strstr(name, "fc."); | |
1262 | if (ptr) { | |
1263 | tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP; | |
1264 | off = 3; /* Skip over "fc." */ | |
1265 | goto check_len; | |
1266 | } | |
1267 | ptr = strstr(name, "iqn."); | |
a57b5d36 | 1268 | if (!ptr) { |
6708bb27 | 1269 | pr_err("Unable to locate prefix for emulated Target " |
a57b5d36 JJ |
1270 | "Port: %s\n", name); |
1271 | ret = -EINVAL; | |
1272 | goto out; | |
3703b2c5 | 1273 | } |
a57b5d36 | 1274 | tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI; |
3703b2c5 NB |
1275 | |
1276 | check_len: | |
60d645a4 | 1277 | if (strlen(name) >= TL_WWN_ADDR_LEN) { |
6708bb27 | 1278 | pr_err("Emulated NAA %s Address: %s, exceeds" |
3703b2c5 NB |
1279 | " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba), |
1280 | TL_WWN_ADDR_LEN); | |
a57b5d36 JJ |
1281 | ret = -EINVAL; |
1282 | goto out; | |
3703b2c5 NB |
1283 | } |
1284 | snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]); | |
1285 | ||
1286 | /* | |
1287 | * Call device_register(tl_hba->dev) to register the emulated | |
1288 | * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after | |
1289 | * device_register() callbacks in tcm_loop_driver_probe() | |
1290 | */ | |
1291 | ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt); | |
1292 | if (ret) | |
1293 | goto out; | |
1294 | ||
1295 | sh = tl_hba->sh; | |
1296 | tcm_loop_hba_no_cnt++; | |
6708bb27 | 1297 | pr_debug("TCM_Loop_ConfigFS: Allocated emulated Target" |
3703b2c5 NB |
1298 | " %s Address: %s at Linux/SCSI Host ID: %d\n", |
1299 | tcm_loop_dump_proto_id(tl_hba), name, sh->host_no); | |
1300 | ||
1301 | return &tl_hba->tl_hba_wwn; | |
1302 | out: | |
1303 | kfree(tl_hba); | |
1304 | return ERR_PTR(ret); | |
1305 | } | |
1306 | ||
f0a6c693 | 1307 | static void tcm_loop_drop_scsi_hba( |
3703b2c5 NB |
1308 | struct se_wwn *wwn) |
1309 | { | |
1310 | struct tcm_loop_hba *tl_hba = container_of(wwn, | |
1311 | struct tcm_loop_hba, tl_hba_wwn); | |
6297b07c NB |
1312 | |
1313 | pr_debug("TCM_Loop_ConfigFS: Deallocating emulated Target" | |
1314 | " SAS Address: %s at Linux/SCSI Host ID: %d\n", | |
1315 | tl_hba->tl_wwn_address, tl_hba->sh->host_no); | |
3703b2c5 NB |
1316 | /* |
1317 | * Call device_unregister() on the original tl_hba->dev. | |
1318 | * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will | |
1319 | * release *tl_hba; | |
1320 | */ | |
1321 | device_unregister(&tl_hba->dev); | |
3703b2c5 NB |
1322 | } |
1323 | ||
1324 | /* Start items for tcm_loop_cit */ | |
1325 | static ssize_t tcm_loop_wwn_show_attr_version( | |
1326 | struct target_fabric_configfs *tf, | |
1327 | char *page) | |
1328 | { | |
1329 | return sprintf(page, "TCM Loopback Fabric module %s\n", TCM_LOOP_VERSION); | |
1330 | } | |
1331 | ||
1332 | TF_WWN_ATTR_RO(tcm_loop, version); | |
1333 | ||
1334 | static struct configfs_attribute *tcm_loop_wwn_attrs[] = { | |
1335 | &tcm_loop_wwn_version.attr, | |
1336 | NULL, | |
1337 | }; | |
1338 | ||
1339 | /* End items for tcm_loop_cit */ | |
1340 | ||
1341 | static int tcm_loop_register_configfs(void) | |
1342 | { | |
1343 | struct target_fabric_configfs *fabric; | |
3703b2c5 NB |
1344 | int ret; |
1345 | /* | |
1346 | * Set the TCM Loop HBA counter to zero | |
1347 | */ | |
1348 | tcm_loop_hba_no_cnt = 0; | |
1349 | /* | |
1350 | * Register the top level struct config_item_type with TCM core | |
1351 | */ | |
1352 | fabric = target_fabric_configfs_init(THIS_MODULE, "loopback"); | |
e3d6f909 | 1353 | if (IS_ERR(fabric)) { |
6708bb27 | 1354 | pr_err("tcm_loop_register_configfs() failed!\n"); |
e3d6f909 | 1355 | return PTR_ERR(fabric); |
3703b2c5 NB |
1356 | } |
1357 | /* | |
1358 | * Setup the fabric API of function pointers used by target_core_mod | |
1359 | */ | |
1360 | fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name; | |
1361 | fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident; | |
1362 | fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn; | |
1363 | fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag; | |
1364 | fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth; | |
1365 | fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id; | |
1366 | fabric->tf_ops.tpg_get_pr_transport_id_len = | |
1367 | &tcm_loop_get_pr_transport_id_len; | |
1368 | fabric->tf_ops.tpg_parse_pr_out_transport_id = | |
1369 | &tcm_loop_parse_pr_out_transport_id; | |
1370 | fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode; | |
1371 | fabric->tf_ops.tpg_check_demo_mode_cache = | |
1372 | &tcm_loop_check_demo_mode_cache; | |
1373 | fabric->tf_ops.tpg_check_demo_mode_write_protect = | |
1374 | &tcm_loop_check_demo_mode_write_protect; | |
1375 | fabric->tf_ops.tpg_check_prod_mode_write_protect = | |
1376 | &tcm_loop_check_prod_mode_write_protect; | |
1377 | /* | |
1378 | * The TCM loopback fabric module runs in demo-mode to a local | |
1379 | * virtual SCSI device, so fabric dependent initator ACLs are | |
1380 | * not required. | |
1381 | */ | |
1382 | fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl; | |
1383 | fabric->tf_ops.tpg_release_fabric_acl = | |
1384 | &tcm_loop_tpg_release_fabric_acl; | |
1385 | fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index; | |
3703b2c5 NB |
1386 | /* |
1387 | * Used for setting up remaining TCM resources in process context | |
1388 | */ | |
3703b2c5 | 1389 | fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free; |
35462975 | 1390 | fabric->tf_ops.release_cmd = &tcm_loop_release_cmd; |
3703b2c5 NB |
1391 | fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session; |
1392 | fabric->tf_ops.close_session = &tcm_loop_close_session; | |
3703b2c5 NB |
1393 | fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index; |
1394 | fabric->tf_ops.sess_get_initiator_sid = NULL; | |
1395 | fabric->tf_ops.write_pending = &tcm_loop_write_pending; | |
1396 | fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status; | |
1397 | /* | |
1398 | * Not used for TCM loopback | |
1399 | */ | |
1400 | fabric->tf_ops.set_default_node_attributes = | |
1401 | &tcm_loop_set_default_node_attributes; | |
1402 | fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag; | |
1403 | fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state; | |
3703b2c5 NB |
1404 | fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in; |
1405 | fabric->tf_ops.queue_status = &tcm_loop_queue_status; | |
1406 | fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp; | |
131e6abc | 1407 | fabric->tf_ops.aborted_task = &tcm_loop_aborted_task; |
3703b2c5 | 1408 | |
3703b2c5 NB |
1409 | /* |
1410 | * Setup function pointers for generic logic in target_core_fabric_configfs.c | |
1411 | */ | |
1412 | fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba; | |
1413 | fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba; | |
1414 | fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg; | |
1415 | fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg; | |
1416 | /* | |
1417 | * fabric_post_link() and fabric_pre_unlink() are used for | |
1418 | * registration and release of TCM Loop Virtual SCSI LUNs. | |
1419 | */ | |
1420 | fabric->tf_ops.fabric_post_link = &tcm_loop_port_link; | |
1421 | fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink; | |
1422 | fabric->tf_ops.fabric_make_np = NULL; | |
1423 | fabric->tf_ops.fabric_drop_np = NULL; | |
1424 | /* | |
1425 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
1426 | */ | |
d80e224d AG |
1427 | fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; |
1428 | fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; | |
1429 | fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL; | |
1430 | fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL; | |
1431 | fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL; | |
3703b2c5 NB |
1432 | /* |
1433 | * Once fabric->tf_ops has been setup, now register the fabric for | |
1434 | * use within TCM | |
1435 | */ | |
1436 | ret = target_fabric_configfs_register(fabric); | |
1437 | if (ret < 0) { | |
6708bb27 | 1438 | pr_err("target_fabric_configfs_register() for" |
3703b2c5 NB |
1439 | " TCM_Loop failed!\n"); |
1440 | target_fabric_configfs_free(fabric); | |
1441 | return -1; | |
1442 | } | |
1443 | /* | |
1444 | * Setup our local pointer to *fabric. | |
1445 | */ | |
1446 | tcm_loop_fabric_configfs = fabric; | |
6708bb27 | 1447 | pr_debug("TCM_LOOP[0] - Set fabric ->" |
3703b2c5 NB |
1448 | " tcm_loop_fabric_configfs\n"); |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static void tcm_loop_deregister_configfs(void) | |
1453 | { | |
1454 | if (!tcm_loop_fabric_configfs) | |
1455 | return; | |
1456 | ||
1457 | target_fabric_configfs_deregister(tcm_loop_fabric_configfs); | |
1458 | tcm_loop_fabric_configfs = NULL; | |
6708bb27 | 1459 | pr_debug("TCM_LOOP[0] - Cleared" |
3703b2c5 NB |
1460 | " tcm_loop_fabric_configfs\n"); |
1461 | } | |
1462 | ||
1463 | static int __init tcm_loop_fabric_init(void) | |
1464 | { | |
afe2cb7f CH |
1465 | int ret = -ENOMEM; |
1466 | ||
1467 | tcm_loop_workqueue = alloc_workqueue("tcm_loop", 0, 0); | |
1468 | if (!tcm_loop_workqueue) | |
1469 | goto out; | |
3703b2c5 NB |
1470 | |
1471 | tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache", | |
1472 | sizeof(struct tcm_loop_cmd), | |
1473 | __alignof__(struct tcm_loop_cmd), | |
1474 | 0, NULL); | |
1475 | if (!tcm_loop_cmd_cache) { | |
6708bb27 | 1476 | pr_debug("kmem_cache_create() for" |
3703b2c5 | 1477 | " tcm_loop_cmd_cache failed\n"); |
afe2cb7f | 1478 | goto out_destroy_workqueue; |
3703b2c5 NB |
1479 | } |
1480 | ||
1481 | ret = tcm_loop_alloc_core_bus(); | |
1482 | if (ret) | |
afe2cb7f | 1483 | goto out_destroy_cache; |
3703b2c5 NB |
1484 | |
1485 | ret = tcm_loop_register_configfs(); | |
afe2cb7f CH |
1486 | if (ret) |
1487 | goto out_release_core_bus; | |
3703b2c5 NB |
1488 | |
1489 | return 0; | |
afe2cb7f CH |
1490 | |
1491 | out_release_core_bus: | |
1492 | tcm_loop_release_core_bus(); | |
1493 | out_destroy_cache: | |
1494 | kmem_cache_destroy(tcm_loop_cmd_cache); | |
1495 | out_destroy_workqueue: | |
1496 | destroy_workqueue(tcm_loop_workqueue); | |
1497 | out: | |
1498 | return ret; | |
3703b2c5 NB |
1499 | } |
1500 | ||
1501 | static void __exit tcm_loop_fabric_exit(void) | |
1502 | { | |
1503 | tcm_loop_deregister_configfs(); | |
1504 | tcm_loop_release_core_bus(); | |
1505 | kmem_cache_destroy(tcm_loop_cmd_cache); | |
afe2cb7f | 1506 | destroy_workqueue(tcm_loop_workqueue); |
3703b2c5 NB |
1507 | } |
1508 | ||
1509 | MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module"); | |
1510 | MODULE_AUTHOR("Nicholas A. Bellinger <nab@risingtidesystems.com>"); | |
1511 | MODULE_LICENSE("GPL"); | |
1512 | module_init(tcm_loop_fabric_init); | |
1513 | module_exit(tcm_loop_fabric_exit); |