1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * NVMe over Fabrics common host code.
4 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
5 */
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/init.h>
8 #include <linux/miscdevice.h>
9 #include <linux/module.h>
10 #include <linux/mutex.h>
11 #include <linux/parser.h>
12 #include <linux/seq_file.h>
13 #include "nvme.h"
14 #include "fabrics.h"
15
16 static LIST_HEAD(nvmf_transports);
17 static DECLARE_RWSEM(nvmf_transports_rwsem);
18
19 static LIST_HEAD(nvmf_hosts);
20 static DEFINE_MUTEX(nvmf_hosts_mutex);
21
22 static struct nvmf_host *nvmf_default_host;
23
__nvmf_host_find(const char * hostnqn)24 static struct nvmf_host *__nvmf_host_find(const char *hostnqn)
25 {
26 struct nvmf_host *host;
27
28 list_for_each_entry(host, &nvmf_hosts, list) {
29 if (!strcmp(host->nqn, hostnqn))
30 return host;
31 }
32
33 return NULL;
34 }
35
nvmf_host_add(const char * hostnqn)36 static struct nvmf_host *nvmf_host_add(const char *hostnqn)
37 {
38 struct nvmf_host *host;
39
40 mutex_lock(&nvmf_hosts_mutex);
41 host = __nvmf_host_find(hostnqn);
42 if (host) {
43 kref_get(&host->ref);
44 goto out_unlock;
45 }
46
47 host = kmalloc(sizeof(*host), GFP_KERNEL);
48 if (!host)
49 goto out_unlock;
50
51 kref_init(&host->ref);
52 strscpy(host->nqn, hostnqn, NVMF_NQN_SIZE);
53
54 list_add_tail(&host->list, &nvmf_hosts);
55 out_unlock:
56 mutex_unlock(&nvmf_hosts_mutex);
57 return host;
58 }
59
nvmf_host_default(void)60 static struct nvmf_host *nvmf_host_default(void)
61 {
62 struct nvmf_host *host;
63
64 host = kmalloc(sizeof(*host), GFP_KERNEL);
65 if (!host)
66 return NULL;
67
68 kref_init(&host->ref);
69 uuid_gen(&host->id);
70 snprintf(host->nqn, NVMF_NQN_SIZE,
71 "nqn.2014-08.org.nvmexpress:uuid:%pUb", &host->id);
72
73 mutex_lock(&nvmf_hosts_mutex);
74 list_add_tail(&host->list, &nvmf_hosts);
75 mutex_unlock(&nvmf_hosts_mutex);
76
77 return host;
78 }
79
nvmf_host_destroy(struct kref * ref)80 static void nvmf_host_destroy(struct kref *ref)
81 {
82 struct nvmf_host *host = container_of(ref, struct nvmf_host, ref);
83
84 mutex_lock(&nvmf_hosts_mutex);
85 list_del(&host->list);
86 mutex_unlock(&nvmf_hosts_mutex);
87
88 kfree(host);
89 }
90
nvmf_host_put(struct nvmf_host * host)91 static void nvmf_host_put(struct nvmf_host *host)
92 {
93 if (host)
94 kref_put(&host->ref, nvmf_host_destroy);
95 }
96
97 /**
98 * nvmf_get_address() - Get address/port
99 * @ctrl: Host NVMe controller instance which we got the address
100 * @buf: OUTPUT parameter that will contain the address/port
101 * @size: buffer size
102 */
nvmf_get_address(struct nvme_ctrl * ctrl,char * buf,int size)103 int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size)
104 {
105 int len = 0;
106
107 if (ctrl->opts->mask & NVMF_OPT_TRADDR)
108 len += scnprintf(buf, size, "traddr=%s", ctrl->opts->traddr);
109 if (ctrl->opts->mask & NVMF_OPT_TRSVCID)
110 len += scnprintf(buf + len, size - len, "%strsvcid=%s",
111 (len) ? "," : "", ctrl->opts->trsvcid);
112 if (ctrl->opts->mask & NVMF_OPT_HOST_TRADDR)
113 len += scnprintf(buf + len, size - len, "%shost_traddr=%s",
114 (len) ? "," : "", ctrl->opts->host_traddr);
115 if (ctrl->opts->mask & NVMF_OPT_HOST_IFACE)
116 len += scnprintf(buf + len, size - len, "%shost_iface=%s",
117 (len) ? "," : "", ctrl->opts->host_iface);
118 len += scnprintf(buf + len, size - len, "\n");
119
120 return len;
121 }
122 EXPORT_SYMBOL_GPL(nvmf_get_address);
123
124 /**
125 * nvmf_reg_read32() - NVMe Fabrics "Property Get" API function.
126 * @ctrl: Host NVMe controller instance maintaining the admin
127 * queue used to submit the property read command to
128 * the allocated NVMe controller resource on the target system.
129 * @off: Starting offset value of the targeted property
130 * register (see the fabrics section of the NVMe standard).
131 * @val: OUTPUT parameter that will contain the value of
132 * the property after a successful read.
133 *
134 * Used by the host system to retrieve a 32-bit capsule property value
135 * from an NVMe controller on the target system.
136 *
137 * ("Capsule property" is an "PCIe register concept" applied to the
138 * NVMe fabrics space.)
139 *
140 * Return:
141 * 0: successful read
142 * > 0: NVMe error status code
143 * < 0: Linux errno error code
144 */
nvmf_reg_read32(struct nvme_ctrl * ctrl,u32 off,u32 * val)145 int nvmf_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val)
146 {
147 struct nvme_command cmd = { };
148 union nvme_result res;
149 int ret;
150
151 cmd.prop_get.opcode = nvme_fabrics_command;
152 cmd.prop_get.fctype = nvme_fabrics_type_property_get;
153 cmd.prop_get.offset = cpu_to_le32(off);
154
155 ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, &res, NULL, 0,
156 NVME_QID_ANY, 0, 0);
157
158 if (ret >= 0)
159 *val = le64_to_cpu(res.u64);
160 if (unlikely(ret != 0))
161 dev_err(ctrl->device,
162 "Property Get error: %d, offset %#x\n",
163 ret > 0 ? ret & ~NVME_SC_DNR : ret, off);
164
165 return ret;
166 }
167 EXPORT_SYMBOL_GPL(nvmf_reg_read32);
168
169 /**
170 * nvmf_reg_read64() - NVMe Fabrics "Property Get" API function.
171 * @ctrl: Host NVMe controller instance maintaining the admin
172 * queue used to submit the property read command to
173 * the allocated controller resource on the target system.
174 * @off: Starting offset value of the targeted property
175 * register (see the fabrics section of the NVMe standard).
176 * @val: OUTPUT parameter that will contain the value of
177 * the property after a successful read.
178 *
179 * Used by the host system to retrieve a 64-bit capsule property value
180 * from an NVMe controller on the target system.
181 *
182 * ("Capsule property" is an "PCIe register concept" applied to the
183 * NVMe fabrics space.)
184 *
185 * Return:
186 * 0: successful read
187 * > 0: NVMe error status code
188 * < 0: Linux errno error code
189 */
nvmf_reg_read64(struct nvme_ctrl * ctrl,u32 off,u64 * val)190 int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val)
191 {
192 struct nvme_command cmd = { };
193 union nvme_result res;
194 int ret;
195
196 cmd.prop_get.opcode = nvme_fabrics_command;
197 cmd.prop_get.fctype = nvme_fabrics_type_property_get;
198 cmd.prop_get.attrib = 1;
199 cmd.prop_get.offset = cpu_to_le32(off);
200
201 ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, &res, NULL, 0,
202 NVME_QID_ANY, 0, 0);
203
204 if (ret >= 0)
205 *val = le64_to_cpu(res.u64);
206 if (unlikely(ret != 0))
207 dev_err(ctrl->device,
208 "Property Get error: %d, offset %#x\n",
209 ret > 0 ? ret & ~NVME_SC_DNR : ret, off);
210 return ret;
211 }
212 EXPORT_SYMBOL_GPL(nvmf_reg_read64);
213
214 /**
215 * nvmf_reg_write32() - NVMe Fabrics "Property Write" API function.
216 * @ctrl: Host NVMe controller instance maintaining the admin
217 * queue used to submit the property read command to
218 * the allocated NVMe controller resource on the target system.
219 * @off: Starting offset value of the targeted property
220 * register (see the fabrics section of the NVMe standard).
221 * @val: Input parameter that contains the value to be
222 * written to the property.
223 *
224 * Used by the NVMe host system to write a 32-bit capsule property value
225 * to an NVMe controller on the target system.
226 *
227 * ("Capsule property" is an "PCIe register concept" applied to the
228 * NVMe fabrics space.)
229 *
230 * Return:
231 * 0: successful write
232 * > 0: NVMe error status code
233 * < 0: Linux errno error code
234 */
nvmf_reg_write32(struct nvme_ctrl * ctrl,u32 off,u32 val)235 int nvmf_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val)
236 {
237 struct nvme_command cmd = { };
238 int ret;
239
240 cmd.prop_set.opcode = nvme_fabrics_command;
241 cmd.prop_set.fctype = nvme_fabrics_type_property_set;
242 cmd.prop_set.attrib = 0;
243 cmd.prop_set.offset = cpu_to_le32(off);
244 cmd.prop_set.value = cpu_to_le64(val);
245
246 ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, NULL, NULL, 0,
247 NVME_QID_ANY, 0, 0);
248 if (unlikely(ret))
249 dev_err(ctrl->device,
250 "Property Set error: %d, offset %#x\n",
251 ret > 0 ? ret & ~NVME_SC_DNR : ret, off);
252 return ret;
253 }
254 EXPORT_SYMBOL_GPL(nvmf_reg_write32);
255
256 /**
257 * nvmf_log_connect_error() - Error-parsing-diagnostic print out function for
258 * connect() errors.
259 * @ctrl: The specific /dev/nvmeX device that had the error.
260 * @errval: Error code to be decoded in a more human-friendly
261 * printout.
262 * @offset: For use with the NVMe error code
263 * NVME_SC_CONNECT_INVALID_PARAM.
264 * @cmd: This is the SQE portion of a submission capsule.
265 * @data: This is the "Data" portion of a submission capsule.
266 */
nvmf_log_connect_error(struct nvme_ctrl * ctrl,int errval,int offset,struct nvme_command * cmd,struct nvmf_connect_data * data)267 static void nvmf_log_connect_error(struct nvme_ctrl *ctrl,
268 int errval, int offset, struct nvme_command *cmd,
269 struct nvmf_connect_data *data)
270 {
271 int err_sctype = errval & ~NVME_SC_DNR;
272
273 if (errval < 0) {
274 dev_err(ctrl->device,
275 "Connect command failed, errno: %d\n", errval);
276 return;
277 }
278
279 switch (err_sctype) {
280 case NVME_SC_CONNECT_INVALID_PARAM:
281 if (offset >> 16) {
282 char *inv_data = "Connect Invalid Data Parameter";
283
284 switch (offset & 0xffff) {
285 case (offsetof(struct nvmf_connect_data, cntlid)):
286 dev_err(ctrl->device,
287 "%s, cntlid: %d\n",
288 inv_data, data->cntlid);
289 break;
290 case (offsetof(struct nvmf_connect_data, hostnqn)):
291 dev_err(ctrl->device,
292 "%s, hostnqn \"%s\"\n",
293 inv_data, data->hostnqn);
294 break;
295 case (offsetof(struct nvmf_connect_data, subsysnqn)):
296 dev_err(ctrl->device,
297 "%s, subsysnqn \"%s\"\n",
298 inv_data, data->subsysnqn);
299 break;
300 default:
301 dev_err(ctrl->device,
302 "%s, starting byte offset: %d\n",
303 inv_data, offset & 0xffff);
304 break;
305 }
306 } else {
307 char *inv_sqe = "Connect Invalid SQE Parameter";
308
309 switch (offset) {
310 case (offsetof(struct nvmf_connect_command, qid)):
311 dev_err(ctrl->device,
312 "%s, qid %d\n",
313 inv_sqe, cmd->connect.qid);
314 break;
315 default:
316 dev_err(ctrl->device,
317 "%s, starting byte offset: %d\n",
318 inv_sqe, offset);
319 }
320 }
321 break;
322 case NVME_SC_CONNECT_INVALID_HOST:
323 dev_err(ctrl->device,
324 "Connect for subsystem %s is not allowed, hostnqn: %s\n",
325 data->subsysnqn, data->hostnqn);
326 break;
327 case NVME_SC_CONNECT_CTRL_BUSY:
328 dev_err(ctrl->device,
329 "Connect command failed: controller is busy or not available\n");
330 break;
331 case NVME_SC_CONNECT_FORMAT:
332 dev_err(ctrl->device,
333 "Connect incompatible format: %d",
334 cmd->connect.recfmt);
335 break;
336 case NVME_SC_HOST_PATH_ERROR:
337 dev_err(ctrl->device,
338 "Connect command failed: host path error\n");
339 break;
340 case NVME_SC_AUTH_REQUIRED:
341 dev_err(ctrl->device,
342 "Connect command failed: authentication required\n");
343 break;
344 default:
345 dev_err(ctrl->device,
346 "Connect command failed, error wo/DNR bit: %d\n",
347 err_sctype);
348 break;
349 }
350 }
351
352 /**
353 * nvmf_connect_admin_queue() - NVMe Fabrics Admin Queue "Connect"
354 * API function.
355 * @ctrl: Host nvme controller instance used to request
356 * a new NVMe controller allocation on the target
357 * system and establish an NVMe Admin connection to
358 * that controller.
359 *
360 * This function enables an NVMe host device to request a new allocation of
361 * an NVMe controller resource on a target system as well establish a
362 * fabrics-protocol connection of the NVMe Admin queue between the
363 * host system device and the allocated NVMe controller on the
364 * target system via a NVMe Fabrics "Connect" command.
365 *
366 * Return:
367 * 0: success
368 * > 0: NVMe error status code
369 * < 0: Linux errno error code
370 *
371 */
nvmf_connect_admin_queue(struct nvme_ctrl * ctrl)372 int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl)
373 {
374 struct nvme_command cmd = { };
375 union nvme_result res;
376 struct nvmf_connect_data *data;
377 int ret;
378 u32 result;
379
380 cmd.connect.opcode = nvme_fabrics_command;
381 cmd.connect.fctype = nvme_fabrics_type_connect;
382 cmd.connect.qid = 0;
383 cmd.connect.sqsize = cpu_to_le16(NVME_AQ_DEPTH - 1);
384
385 /*
386 * Set keep-alive timeout in seconds granularity (ms * 1000)
387 */
388 cmd.connect.kato = cpu_to_le32(ctrl->kato * 1000);
389
390 if (ctrl->opts->disable_sqflow)
391 cmd.connect.cattr |= NVME_CONNECT_DISABLE_SQFLOW;
392
393 data = kzalloc(sizeof(*data), GFP_KERNEL);
394 if (!data)
395 return -ENOMEM;
396
397 uuid_copy(&data->hostid, &ctrl->opts->host->id);
398 data->cntlid = cpu_to_le16(0xffff);
399 strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE);
400 strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE);
401
402 ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, &res,
403 data, sizeof(*data), NVME_QID_ANY, 1,
404 BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT);
405 if (ret) {
406 nvmf_log_connect_error(ctrl, ret, le32_to_cpu(res.u32),
407 &cmd, data);
408 goto out_free_data;
409 }
410
411 result = le32_to_cpu(res.u32);
412 ctrl->cntlid = result & 0xFFFF;
413 if ((result >> 16) & 0x3) {
414 /* Authentication required */
415 ret = nvme_auth_negotiate(ctrl, 0);
416 if (ret) {
417 dev_warn(ctrl->device,
418 "qid 0: authentication setup failed\n");
419 ret = NVME_SC_AUTH_REQUIRED;
420 goto out_free_data;
421 }
422 ret = nvme_auth_wait(ctrl, 0);
423 if (ret)
424 dev_warn(ctrl->device,
425 "qid 0: authentication failed\n");
426 else
427 dev_info(ctrl->device,
428 "qid 0: authenticated\n");
429 }
430 out_free_data:
431 kfree(data);
432 return ret;
433 }
434 EXPORT_SYMBOL_GPL(nvmf_connect_admin_queue);
435
436 /**
437 * nvmf_connect_io_queue() - NVMe Fabrics I/O Queue "Connect"
438 * API function.
439 * @ctrl: Host nvme controller instance used to establish an
440 * NVMe I/O queue connection to the already allocated NVMe
441 * controller on the target system.
442 * @qid: NVMe I/O queue number for the new I/O connection between
443 * host and target (note qid == 0 is illegal as this is
444 * the Admin queue, per NVMe standard).
445 *
446 * This function issues a fabrics-protocol connection
447 * of a NVMe I/O queue (via NVMe Fabrics "Connect" command)
448 * between the host system device and the allocated NVMe controller
449 * on the target system.
450 *
451 * Return:
452 * 0: success
453 * > 0: NVMe error status code
454 * < 0: Linux errno error code
455 */
nvmf_connect_io_queue(struct nvme_ctrl * ctrl,u16 qid)456 int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid)
457 {
458 struct nvme_command cmd = { };
459 struct nvmf_connect_data *data;
460 union nvme_result res;
461 int ret;
462 u32 result;
463
464 cmd.connect.opcode = nvme_fabrics_command;
465 cmd.connect.fctype = nvme_fabrics_type_connect;
466 cmd.connect.qid = cpu_to_le16(qid);
467 cmd.connect.sqsize = cpu_to_le16(ctrl->sqsize);
468
469 if (ctrl->opts->disable_sqflow)
470 cmd.connect.cattr |= NVME_CONNECT_DISABLE_SQFLOW;
471
472 data = kzalloc(sizeof(*data), GFP_KERNEL);
473 if (!data)
474 return -ENOMEM;
475
476 uuid_copy(&data->hostid, &ctrl->opts->host->id);
477 data->cntlid = cpu_to_le16(ctrl->cntlid);
478 strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE);
479 strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE);
480
481 ret = __nvme_submit_sync_cmd(ctrl->connect_q, &cmd, &res,
482 data, sizeof(*data), qid, 1,
483 BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT);
484 if (ret) {
485 nvmf_log_connect_error(ctrl, ret, le32_to_cpu(res.u32),
486 &cmd, data);
487 }
488 result = le32_to_cpu(res.u32);
489 if ((result >> 16) & 2) {
490 /* Authentication required */
491 ret = nvme_auth_negotiate(ctrl, qid);
492 if (ret) {
493 dev_warn(ctrl->device,
494 "qid %d: authentication setup failed\n", qid);
495 ret = NVME_SC_AUTH_REQUIRED;
496 } else {
497 ret = nvme_auth_wait(ctrl, qid);
498 if (ret)
499 dev_warn(ctrl->device,
500 "qid %u: authentication failed\n", qid);
501 }
502 }
503 kfree(data);
504 return ret;
505 }
506 EXPORT_SYMBOL_GPL(nvmf_connect_io_queue);
507
nvmf_should_reconnect(struct nvme_ctrl * ctrl)508 bool nvmf_should_reconnect(struct nvme_ctrl *ctrl)
509 {
510 if (ctrl->opts->max_reconnects == -1 ||
511 ctrl->nr_reconnects < ctrl->opts->max_reconnects)
512 return true;
513
514 return false;
515 }
516 EXPORT_SYMBOL_GPL(nvmf_should_reconnect);
517
518 /**
519 * nvmf_register_transport() - NVMe Fabrics Library registration function.
520 * @ops: Transport ops instance to be registered to the
521 * common fabrics library.
522 *
523 * API function that registers the type of specific transport fabric
524 * being implemented to the common NVMe fabrics library. Part of
525 * the overall init sequence of starting up a fabrics driver.
526 */
nvmf_register_transport(struct nvmf_transport_ops * ops)527 int nvmf_register_transport(struct nvmf_transport_ops *ops)
528 {
529 if (!ops->create_ctrl)
530 return -EINVAL;
531
532 down_write(&nvmf_transports_rwsem);
533 list_add_tail(&ops->entry, &nvmf_transports);
534 up_write(&nvmf_transports_rwsem);
535
536 return 0;
537 }
538 EXPORT_SYMBOL_GPL(nvmf_register_transport);
539
540 /**
541 * nvmf_unregister_transport() - NVMe Fabrics Library unregistration function.
542 * @ops: Transport ops instance to be unregistered from the
543 * common fabrics library.
544 *
545 * Fabrics API function that unregisters the type of specific transport
546 * fabric being implemented from the common NVMe fabrics library.
547 * Part of the overall exit sequence of unloading the implemented driver.
548 */
nvmf_unregister_transport(struct nvmf_transport_ops * ops)549 void nvmf_unregister_transport(struct nvmf_transport_ops *ops)
550 {
551 down_write(&nvmf_transports_rwsem);
552 list_del(&ops->entry);
553 up_write(&nvmf_transports_rwsem);
554 }
555 EXPORT_SYMBOL_GPL(nvmf_unregister_transport);
556
nvmf_lookup_transport(struct nvmf_ctrl_options * opts)557 static struct nvmf_transport_ops *nvmf_lookup_transport(
558 struct nvmf_ctrl_options *opts)
559 {
560 struct nvmf_transport_ops *ops;
561
562 lockdep_assert_held(&nvmf_transports_rwsem);
563
564 list_for_each_entry(ops, &nvmf_transports, entry) {
565 if (strcmp(ops->name, opts->transport) == 0)
566 return ops;
567 }
568
569 return NULL;
570 }
571
572 static const match_table_t opt_tokens = {
573 { NVMF_OPT_TRANSPORT, "transport=%s" },
574 { NVMF_OPT_TRADDR, "traddr=%s" },
575 { NVMF_OPT_TRSVCID, "trsvcid=%s" },
576 { NVMF_OPT_NQN, "nqn=%s" },
577 { NVMF_OPT_QUEUE_SIZE, "queue_size=%d" },
578 { NVMF_OPT_NR_IO_QUEUES, "nr_io_queues=%d" },
579 { NVMF_OPT_RECONNECT_DELAY, "reconnect_delay=%d" },
580 { NVMF_OPT_CTRL_LOSS_TMO, "ctrl_loss_tmo=%d" },
581 { NVMF_OPT_KATO, "keep_alive_tmo=%d" },
582 { NVMF_OPT_HOSTNQN, "hostnqn=%s" },
583 { NVMF_OPT_HOST_TRADDR, "host_traddr=%s" },
584 { NVMF_OPT_HOST_IFACE, "host_iface=%s" },
585 { NVMF_OPT_HOST_ID, "hostid=%s" },
586 { NVMF_OPT_DUP_CONNECT, "duplicate_connect" },
587 { NVMF_OPT_DISABLE_SQFLOW, "disable_sqflow" },
588 { NVMF_OPT_HDR_DIGEST, "hdr_digest" },
589 { NVMF_OPT_DATA_DIGEST, "data_digest" },
590 { NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
591 { NVMF_OPT_NR_POLL_QUEUES, "nr_poll_queues=%d" },
592 { NVMF_OPT_TOS, "tos=%d" },
593 { NVMF_OPT_FAIL_FAST_TMO, "fast_io_fail_tmo=%d" },
594 { NVMF_OPT_DISCOVERY, "discovery" },
595 { NVMF_OPT_DHCHAP_SECRET, "dhchap_secret=%s" },
596 { NVMF_OPT_DHCHAP_CTRL_SECRET, "dhchap_ctrl_secret=%s" },
597 { NVMF_OPT_ERR, NULL }
598 };
599
nvmf_parse_options(struct nvmf_ctrl_options * opts,const char * buf)600 static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
601 const char *buf)
602 {
603 substring_t args[MAX_OPT_ARGS];
604 char *options, *o, *p;
605 int token, ret = 0;
606 size_t nqnlen = 0;
607 int ctrl_loss_tmo = NVMF_DEF_CTRL_LOSS_TMO;
608 uuid_t hostid;
609
610 /* Set defaults */
611 opts->queue_size = NVMF_DEF_QUEUE_SIZE;
612 opts->nr_io_queues = num_online_cpus();
613 opts->reconnect_delay = NVMF_DEF_RECONNECT_DELAY;
614 opts->kato = 0;
615 opts->duplicate_connect = false;
616 opts->fast_io_fail_tmo = NVMF_DEF_FAIL_FAST_TMO;
617 opts->hdr_digest = false;
618 opts->data_digest = false;
619 opts->tos = -1; /* < 0 == use transport default */
620
621 options = o = kstrdup(buf, GFP_KERNEL);
622 if (!options)
623 return -ENOMEM;
624
625 uuid_gen(&hostid);
626
627 while ((p = strsep(&o, ",\n")) != NULL) {
628 if (!*p)
629 continue;
630
631 token = match_token(p, opt_tokens, args);
632 opts->mask |= token;
633 switch (token) {
634 case NVMF_OPT_TRANSPORT:
635 p = match_strdup(args);
636 if (!p) {
637 ret = -ENOMEM;
638 goto out;
639 }
640 kfree(opts->transport);
641 opts->transport = p;
642 break;
643 case NVMF_OPT_NQN:
644 p = match_strdup(args);
645 if (!p) {
646 ret = -ENOMEM;
647 goto out;
648 }
649 kfree(opts->subsysnqn);
650 opts->subsysnqn = p;
651 nqnlen = strlen(opts->subsysnqn);
652 if (nqnlen >= NVMF_NQN_SIZE) {
653 pr_err("%s needs to be < %d bytes\n",
654 opts->subsysnqn, NVMF_NQN_SIZE);
655 ret = -EINVAL;
656 goto out;
657 }
658 opts->discovery_nqn =
659 !(strcmp(opts->subsysnqn,
660 NVME_DISC_SUBSYS_NAME));
661 break;
662 case NVMF_OPT_TRADDR:
663 p = match_strdup(args);
664 if (!p) {
665 ret = -ENOMEM;
666 goto out;
667 }
668 kfree(opts->traddr);
669 opts->traddr = p;
670 break;
671 case NVMF_OPT_TRSVCID:
672 p = match_strdup(args);
673 if (!p) {
674 ret = -ENOMEM;
675 goto out;
676 }
677 kfree(opts->trsvcid);
678 opts->trsvcid = p;
679 break;
680 case NVMF_OPT_QUEUE_SIZE:
681 if (match_int(args, &token)) {
682 ret = -EINVAL;
683 goto out;
684 }
685 if (token < NVMF_MIN_QUEUE_SIZE ||
686 token > NVMF_MAX_QUEUE_SIZE) {
687 pr_err("Invalid queue_size %d\n", token);
688 ret = -EINVAL;
689 goto out;
690 }
691 opts->queue_size = token;
692 break;
693 case NVMF_OPT_NR_IO_QUEUES:
694 if (match_int(args, &token)) {
695 ret = -EINVAL;
696 goto out;
697 }
698 if (token <= 0) {
699 pr_err("Invalid number of IOQs %d\n", token);
700 ret = -EINVAL;
701 goto out;
702 }
703 if (opts->discovery_nqn) {
704 pr_debug("Ignoring nr_io_queues value for discovery controller\n");
705 break;
706 }
707
708 opts->nr_io_queues = min_t(unsigned int,
709 num_online_cpus(), token);
710 break;
711 case NVMF_OPT_KATO:
712 if (match_int(args, &token)) {
713 ret = -EINVAL;
714 goto out;
715 }
716
717 if (token < 0) {
718 pr_err("Invalid keep_alive_tmo %d\n", token);
719 ret = -EINVAL;
720 goto out;
721 } else if (token == 0 && !opts->discovery_nqn) {
722 /* Allowed for debug */
723 pr_warn("keep_alive_tmo 0 won't execute keep alives!!!\n");
724 }
725 opts->kato = token;
726 break;
727 case NVMF_OPT_CTRL_LOSS_TMO:
728 if (match_int(args, &token)) {
729 ret = -EINVAL;
730 goto out;
731 }
732
733 if (token < 0)
734 pr_warn("ctrl_loss_tmo < 0 will reconnect forever\n");
735 ctrl_loss_tmo = token;
736 break;
737 case NVMF_OPT_FAIL_FAST_TMO:
738 if (match_int(args, &token)) {
739 ret = -EINVAL;
740 goto out;
741 }
742
743 if (token >= 0)
744 pr_warn("I/O fail on reconnect controller after %d sec\n",
745 token);
746 else
747 token = -1;
748
749 opts->fast_io_fail_tmo = token;
750 break;
751 case NVMF_OPT_HOSTNQN:
752 if (opts->host) {
753 pr_err("hostnqn already user-assigned: %s\n",
754 opts->host->nqn);
755 ret = -EADDRINUSE;
756 goto out;
757 }
758 p = match_strdup(args);
759 if (!p) {
760 ret = -ENOMEM;
761 goto out;
762 }
763 nqnlen = strlen(p);
764 if (nqnlen >= NVMF_NQN_SIZE) {
765 pr_err("%s needs to be < %d bytes\n",
766 p, NVMF_NQN_SIZE);
767 kfree(p);
768 ret = -EINVAL;
769 goto out;
770 }
771 opts->host = nvmf_host_add(p);
772 kfree(p);
773 if (!opts->host) {
774 ret = -ENOMEM;
775 goto out;
776 }
777 break;
778 case NVMF_OPT_RECONNECT_DELAY:
779 if (match_int(args, &token)) {
780 ret = -EINVAL;
781 goto out;
782 }
783 if (token <= 0) {
784 pr_err("Invalid reconnect_delay %d\n", token);
785 ret = -EINVAL;
786 goto out;
787 }
788 opts->reconnect_delay = token;
789 break;
790 case NVMF_OPT_HOST_TRADDR:
791 p = match_strdup(args);
792 if (!p) {
793 ret = -ENOMEM;
794 goto out;
795 }
796 kfree(opts->host_traddr);
797 opts->host_traddr = p;
798 break;
799 case NVMF_OPT_HOST_IFACE:
800 p = match_strdup(args);
801 if (!p) {
802 ret = -ENOMEM;
803 goto out;
804 }
805 kfree(opts->host_iface);
806 opts->host_iface = p;
807 break;
808 case NVMF_OPT_HOST_ID:
809 p = match_strdup(args);
810 if (!p) {
811 ret = -ENOMEM;
812 goto out;
813 }
814 ret = uuid_parse(p, &hostid);
815 if (ret) {
816 pr_err("Invalid hostid %s\n", p);
817 ret = -EINVAL;
818 kfree(p);
819 goto out;
820 }
821 kfree(p);
822 break;
823 case NVMF_OPT_DUP_CONNECT:
824 opts->duplicate_connect = true;
825 break;
826 case NVMF_OPT_DISABLE_SQFLOW:
827 opts->disable_sqflow = true;
828 break;
829 case NVMF_OPT_HDR_DIGEST:
830 opts->hdr_digest = true;
831 break;
832 case NVMF_OPT_DATA_DIGEST:
833 opts->data_digest = true;
834 break;
835 case NVMF_OPT_NR_WRITE_QUEUES:
836 if (match_int(args, &token)) {
837 ret = -EINVAL;
838 goto out;
839 }
840 if (token <= 0) {
841 pr_err("Invalid nr_write_queues %d\n", token);
842 ret = -EINVAL;
843 goto out;
844 }
845 opts->nr_write_queues = token;
846 break;
847 case NVMF_OPT_NR_POLL_QUEUES:
848 if (match_int(args, &token)) {
849 ret = -EINVAL;
850 goto out;
851 }
852 if (token <= 0) {
853 pr_err("Invalid nr_poll_queues %d\n", token);
854 ret = -EINVAL;
855 goto out;
856 }
857 opts->nr_poll_queues = token;
858 break;
859 case NVMF_OPT_TOS:
860 if (match_int(args, &token)) {
861 ret = -EINVAL;
862 goto out;
863 }
864 if (token < 0) {
865 pr_err("Invalid type of service %d\n", token);
866 ret = -EINVAL;
867 goto out;
868 }
869 if (token > 255) {
870 pr_warn("Clamping type of service to 255\n");
871 token = 255;
872 }
873 opts->tos = token;
874 break;
875 case NVMF_OPT_DISCOVERY:
876 opts->discovery_nqn = true;
877 break;
878 case NVMF_OPT_DHCHAP_SECRET:
879 p = match_strdup(args);
880 if (!p) {
881 ret = -ENOMEM;
882 goto out;
883 }
884 if (strlen(p) < 11 || strncmp(p, "DHHC-1:", 7)) {
885 pr_err("Invalid DH-CHAP secret %s\n", p);
886 ret = -EINVAL;
887 goto out;
888 }
889 kfree(opts->dhchap_secret);
890 opts->dhchap_secret = p;
891 break;
892 case NVMF_OPT_DHCHAP_CTRL_SECRET:
893 p = match_strdup(args);
894 if (!p) {
895 ret = -ENOMEM;
896 goto out;
897 }
898 if (strlen(p) < 11 || strncmp(p, "DHHC-1:", 7)) {
899 pr_err("Invalid DH-CHAP secret %s\n", p);
900 ret = -EINVAL;
901 goto out;
902 }
903 kfree(opts->dhchap_ctrl_secret);
904 opts->dhchap_ctrl_secret = p;
905 break;
906 default:
907 pr_warn("unknown parameter or missing value '%s' in ctrl creation request\n",
908 p);
909 ret = -EINVAL;
910 goto out;
911 }
912 }
913
914 if (opts->discovery_nqn) {
915 opts->nr_io_queues = 0;
916 opts->nr_write_queues = 0;
917 opts->nr_poll_queues = 0;
918 opts->duplicate_connect = true;
919 } else {
920 if (!opts->kato)
921 opts->kato = NVME_DEFAULT_KATO;
922 }
923 if (ctrl_loss_tmo < 0) {
924 opts->max_reconnects = -1;
925 } else {
926 opts->max_reconnects = DIV_ROUND_UP(ctrl_loss_tmo,
927 opts->reconnect_delay);
928 if (ctrl_loss_tmo < opts->fast_io_fail_tmo)
929 pr_warn("failfast tmo (%d) larger than controller loss tmo (%d)\n",
930 opts->fast_io_fail_tmo, ctrl_loss_tmo);
931 }
932
933 if (!opts->host) {
934 kref_get(&nvmf_default_host->ref);
935 opts->host = nvmf_default_host;
936 }
937
938 uuid_copy(&opts->host->id, &hostid);
939
940 out:
941 kfree(options);
942 return ret;
943 }
944
nvmf_check_required_opts(struct nvmf_ctrl_options * opts,unsigned int required_opts)945 static int nvmf_check_required_opts(struct nvmf_ctrl_options *opts,
946 unsigned int required_opts)
947 {
948 if ((opts->mask & required_opts) != required_opts) {
949 unsigned int i;
950
951 for (i = 0; i < ARRAY_SIZE(opt_tokens); i++) {
952 if ((opt_tokens[i].token & required_opts) &&
953 !(opt_tokens[i].token & opts->mask)) {
954 pr_warn("missing parameter '%s'\n",
955 opt_tokens[i].pattern);
956 }
957 }
958
959 return -EINVAL;
960 }
961
962 return 0;
963 }
964
nvmf_ip_options_match(struct nvme_ctrl * ctrl,struct nvmf_ctrl_options * opts)965 bool nvmf_ip_options_match(struct nvme_ctrl *ctrl,
966 struct nvmf_ctrl_options *opts)
967 {
968 if (!nvmf_ctlr_matches_baseopts(ctrl, opts) ||
969 strcmp(opts->traddr, ctrl->opts->traddr) ||
970 strcmp(opts->trsvcid, ctrl->opts->trsvcid))
971 return false;
972
973 /*
974 * Checking the local address or host interfaces is rough.
975 *
976 * In most cases, none is specified and the host port or
977 * host interface is selected by the stack.
978 *
979 * Assume no match if:
980 * - local address or host interface is specified and address
981 * or host interface is not the same
982 * - local address or host interface is not specified but
983 * remote is, or vice versa (admin using specific
984 * host_traddr/host_iface when it matters).
985 */
986 if ((opts->mask & NVMF_OPT_HOST_TRADDR) &&
987 (ctrl->opts->mask & NVMF_OPT_HOST_TRADDR)) {
988 if (strcmp(opts->host_traddr, ctrl->opts->host_traddr))
989 return false;
990 } else if ((opts->mask & NVMF_OPT_HOST_TRADDR) ||
991 (ctrl->opts->mask & NVMF_OPT_HOST_TRADDR)) {
992 return false;
993 }
994
995 if ((opts->mask & NVMF_OPT_HOST_IFACE) &&
996 (ctrl->opts->mask & NVMF_OPT_HOST_IFACE)) {
997 if (strcmp(opts->host_iface, ctrl->opts->host_iface))
998 return false;
999 } else if ((opts->mask & NVMF_OPT_HOST_IFACE) ||
1000 (ctrl->opts->mask & NVMF_OPT_HOST_IFACE)) {
1001 return false;
1002 }
1003
1004 return true;
1005 }
1006 EXPORT_SYMBOL_GPL(nvmf_ip_options_match);
1007
nvmf_check_allowed_opts(struct nvmf_ctrl_options * opts,unsigned int allowed_opts)1008 static int nvmf_check_allowed_opts(struct nvmf_ctrl_options *opts,
1009 unsigned int allowed_opts)
1010 {
1011 if (opts->mask & ~allowed_opts) {
1012 unsigned int i;
1013
1014 for (i = 0; i < ARRAY_SIZE(opt_tokens); i++) {
1015 if ((opt_tokens[i].token & opts->mask) &&
1016 (opt_tokens[i].token & ~allowed_opts)) {
1017 pr_warn("invalid parameter '%s'\n",
1018 opt_tokens[i].pattern);
1019 }
1020 }
1021
1022 return -EINVAL;
1023 }
1024
1025 return 0;
1026 }
1027
nvmf_free_options(struct nvmf_ctrl_options * opts)1028 void nvmf_free_options(struct nvmf_ctrl_options *opts)
1029 {
1030 nvmf_host_put(opts->host);
1031 kfree(opts->transport);
1032 kfree(opts->traddr);
1033 kfree(opts->trsvcid);
1034 kfree(opts->subsysnqn);
1035 kfree(opts->host_traddr);
1036 kfree(opts->host_iface);
1037 kfree(opts->dhchap_secret);
1038 kfree(opts->dhchap_ctrl_secret);
1039 kfree(opts);
1040 }
1041 EXPORT_SYMBOL_GPL(nvmf_free_options);
1042
1043 #define NVMF_REQUIRED_OPTS (NVMF_OPT_TRANSPORT | NVMF_OPT_NQN)
1044 #define NVMF_ALLOWED_OPTS (NVMF_OPT_QUEUE_SIZE | NVMF_OPT_NR_IO_QUEUES | \
1045 NVMF_OPT_KATO | NVMF_OPT_HOSTNQN | \
1046 NVMF_OPT_HOST_ID | NVMF_OPT_DUP_CONNECT |\
1047 NVMF_OPT_DISABLE_SQFLOW | NVMF_OPT_DISCOVERY |\
1048 NVMF_OPT_FAIL_FAST_TMO | NVMF_OPT_DHCHAP_SECRET |\
1049 NVMF_OPT_DHCHAP_CTRL_SECRET)
1050
1051 static struct nvme_ctrl *
nvmf_create_ctrl(struct device * dev,const char * buf)1052 nvmf_create_ctrl(struct device *dev, const char *buf)
1053 {
1054 struct nvmf_ctrl_options *opts;
1055 struct nvmf_transport_ops *ops;
1056 struct nvme_ctrl *ctrl;
1057 int ret;
1058
1059 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
1060 if (!opts)
1061 return ERR_PTR(-ENOMEM);
1062
1063 ret = nvmf_parse_options(opts, buf);
1064 if (ret)
1065 goto out_free_opts;
1066
1067
1068 request_module("nvme-%s", opts->transport);
1069
1070 /*
1071 * Check the generic options first as we need a valid transport for
1072 * the lookup below. Then clear the generic flags so that transport
1073 * drivers don't have to care about them.
1074 */
1075 ret = nvmf_check_required_opts(opts, NVMF_REQUIRED_OPTS);
1076 if (ret)
1077 goto out_free_opts;
1078 opts->mask &= ~NVMF_REQUIRED_OPTS;
1079
1080 down_read(&nvmf_transports_rwsem);
1081 ops = nvmf_lookup_transport(opts);
1082 if (!ops) {
1083 pr_info("no handler found for transport %s.\n",
1084 opts->transport);
1085 ret = -EINVAL;
1086 goto out_unlock;
1087 }
1088
1089 if (!try_module_get(ops->module)) {
1090 ret = -EBUSY;
1091 goto out_unlock;
1092 }
1093 up_read(&nvmf_transports_rwsem);
1094
1095 ret = nvmf_check_required_opts(opts, ops->required_opts);
1096 if (ret)
1097 goto out_module_put;
1098 ret = nvmf_check_allowed_opts(opts, NVMF_ALLOWED_OPTS |
1099 ops->allowed_opts | ops->required_opts);
1100 if (ret)
1101 goto out_module_put;
1102
1103 ctrl = ops->create_ctrl(dev, opts);
1104 if (IS_ERR(ctrl)) {
1105 ret = PTR_ERR(ctrl);
1106 goto out_module_put;
1107 }
1108
1109 module_put(ops->module);
1110 return ctrl;
1111
1112 out_module_put:
1113 module_put(ops->module);
1114 goto out_free_opts;
1115 out_unlock:
1116 up_read(&nvmf_transports_rwsem);
1117 out_free_opts:
1118 nvmf_free_options(opts);
1119 return ERR_PTR(ret);
1120 }
1121
1122 static struct class *nvmf_class;
1123 static struct device *nvmf_device;
1124 static DEFINE_MUTEX(nvmf_dev_mutex);
1125
nvmf_dev_write(struct file * file,const char __user * ubuf,size_t count,loff_t * pos)1126 static ssize_t nvmf_dev_write(struct file *file, const char __user *ubuf,
1127 size_t count, loff_t *pos)
1128 {
1129 struct seq_file *seq_file = file->private_data;
1130 struct nvme_ctrl *ctrl;
1131 const char *buf;
1132 int ret = 0;
1133
1134 if (count > PAGE_SIZE)
1135 return -ENOMEM;
1136
1137 buf = memdup_user_nul(ubuf, count);
1138 if (IS_ERR(buf))
1139 return PTR_ERR(buf);
1140
1141 mutex_lock(&nvmf_dev_mutex);
1142 if (seq_file->private) {
1143 ret = -EINVAL;
1144 goto out_unlock;
1145 }
1146
1147 ctrl = nvmf_create_ctrl(nvmf_device, buf);
1148 if (IS_ERR(ctrl)) {
1149 ret = PTR_ERR(ctrl);
1150 goto out_unlock;
1151 }
1152
1153 seq_file->private = ctrl;
1154
1155 out_unlock:
1156 mutex_unlock(&nvmf_dev_mutex);
1157 kfree(buf);
1158 return ret ? ret : count;
1159 }
1160
__nvmf_concat_opt_tokens(struct seq_file * seq_file)1161 static void __nvmf_concat_opt_tokens(struct seq_file *seq_file)
1162 {
1163 const struct match_token *tok;
1164 int idx;
1165
1166 /*
1167 * Add dummy entries for instance and cntlid to
1168 * signal an invalid/non-existing controller
1169 */
1170 seq_puts(seq_file, "instance=-1,cntlid=-1");
1171 for (idx = 0; idx < ARRAY_SIZE(opt_tokens); idx++) {
1172 tok = &opt_tokens[idx];
1173 if (tok->token == NVMF_OPT_ERR)
1174 continue;
1175 seq_puts(seq_file, ",");
1176 seq_puts(seq_file, tok->pattern);
1177 }
1178 seq_puts(seq_file, "\n");
1179 }
1180
nvmf_dev_show(struct seq_file * seq_file,void * private)1181 static int nvmf_dev_show(struct seq_file *seq_file, void *private)
1182 {
1183 struct nvme_ctrl *ctrl;
1184
1185 mutex_lock(&nvmf_dev_mutex);
1186 ctrl = seq_file->private;
1187 if (!ctrl) {
1188 __nvmf_concat_opt_tokens(seq_file);
1189 goto out_unlock;
1190 }
1191
1192 seq_printf(seq_file, "instance=%d,cntlid=%d\n",
1193 ctrl->instance, ctrl->cntlid);
1194
1195 out_unlock:
1196 mutex_unlock(&nvmf_dev_mutex);
1197 return 0;
1198 }
1199
nvmf_dev_open(struct inode * inode,struct file * file)1200 static int nvmf_dev_open(struct inode *inode, struct file *file)
1201 {
1202 /*
1203 * The miscdevice code initializes file->private_data, but doesn't
1204 * make use of it later.
1205 */
1206 file->private_data = NULL;
1207 return single_open(file, nvmf_dev_show, NULL);
1208 }
1209
nvmf_dev_release(struct inode * inode,struct file * file)1210 static int nvmf_dev_release(struct inode *inode, struct file *file)
1211 {
1212 struct seq_file *seq_file = file->private_data;
1213 struct nvme_ctrl *ctrl = seq_file->private;
1214
1215 if (ctrl)
1216 nvme_put_ctrl(ctrl);
1217 return single_release(inode, file);
1218 }
1219
1220 static const struct file_operations nvmf_dev_fops = {
1221 .owner = THIS_MODULE,
1222 .write = nvmf_dev_write,
1223 .read = seq_read,
1224 .open = nvmf_dev_open,
1225 .release = nvmf_dev_release,
1226 };
1227
1228 static struct miscdevice nvmf_misc = {
1229 .minor = MISC_DYNAMIC_MINOR,
1230 .name = "nvme-fabrics",
1231 .fops = &nvmf_dev_fops,
1232 };
1233
nvmf_init(void)1234 static int __init nvmf_init(void)
1235 {
1236 int ret;
1237
1238 nvmf_default_host = nvmf_host_default();
1239 if (!nvmf_default_host)
1240 return -ENOMEM;
1241
1242 nvmf_class = class_create(THIS_MODULE, "nvme-fabrics");
1243 if (IS_ERR(nvmf_class)) {
1244 pr_err("couldn't register class nvme-fabrics\n");
1245 ret = PTR_ERR(nvmf_class);
1246 goto out_free_host;
1247 }
1248
1249 nvmf_device =
1250 device_create(nvmf_class, NULL, MKDEV(0, 0), NULL, "ctl");
1251 if (IS_ERR(nvmf_device)) {
1252 pr_err("couldn't create nvme-fabrics device!\n");
1253 ret = PTR_ERR(nvmf_device);
1254 goto out_destroy_class;
1255 }
1256
1257 ret = misc_register(&nvmf_misc);
1258 if (ret) {
1259 pr_err("couldn't register misc device: %d\n", ret);
1260 goto out_destroy_device;
1261 }
1262
1263 return 0;
1264
1265 out_destroy_device:
1266 device_destroy(nvmf_class, MKDEV(0, 0));
1267 out_destroy_class:
1268 class_destroy(nvmf_class);
1269 out_free_host:
1270 nvmf_host_put(nvmf_default_host);
1271 return ret;
1272 }
1273
nvmf_exit(void)1274 static void __exit nvmf_exit(void)
1275 {
1276 misc_deregister(&nvmf_misc);
1277 device_destroy(nvmf_class, MKDEV(0, 0));
1278 class_destroy(nvmf_class);
1279 nvmf_host_put(nvmf_default_host);
1280
1281 BUILD_BUG_ON(sizeof(struct nvmf_common_command) != 64);
1282 BUILD_BUG_ON(sizeof(struct nvmf_connect_command) != 64);
1283 BUILD_BUG_ON(sizeof(struct nvmf_property_get_command) != 64);
1284 BUILD_BUG_ON(sizeof(struct nvmf_property_set_command) != 64);
1285 BUILD_BUG_ON(sizeof(struct nvmf_auth_send_command) != 64);
1286 BUILD_BUG_ON(sizeof(struct nvmf_auth_receive_command) != 64);
1287 BUILD_BUG_ON(sizeof(struct nvmf_connect_data) != 1024);
1288 BUILD_BUG_ON(sizeof(struct nvmf_auth_dhchap_negotiate_data) != 8);
1289 BUILD_BUG_ON(sizeof(struct nvmf_auth_dhchap_challenge_data) != 16);
1290 BUILD_BUG_ON(sizeof(struct nvmf_auth_dhchap_reply_data) != 16);
1291 BUILD_BUG_ON(sizeof(struct nvmf_auth_dhchap_success1_data) != 16);
1292 BUILD_BUG_ON(sizeof(struct nvmf_auth_dhchap_success2_data) != 16);
1293 }
1294
1295 MODULE_LICENSE("GPL v2");
1296
1297 module_init(nvmf_init);
1298 module_exit(nvmf_exit);
1299