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a07b4970 CH |
1 | /* |
2 | * Configfs interface for the NVMe target. | |
3 | * Copyright (c) 2015-2016 HGST, a Western Digital Company. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/stat.h> | |
19 | #include <linux/ctype.h> | |
20 | ||
21 | #include "nvmet.h" | |
22 | ||
23 | static struct config_item_type nvmet_host_type; | |
24 | static struct config_item_type nvmet_subsys_type; | |
25 | ||
26 | /* | |
27 | * nvmet_port Generic ConfigFS definitions. | |
28 | * Used in any place in the ConfigFS tree that refers to an address. | |
29 | */ | |
30 | static ssize_t nvmet_addr_adrfam_show(struct config_item *item, | |
31 | char *page) | |
32 | { | |
33 | switch (to_nvmet_port(item)->disc_addr.adrfam) { | |
34 | case NVMF_ADDR_FAMILY_IP4: | |
35 | return sprintf(page, "ipv4\n"); | |
36 | case NVMF_ADDR_FAMILY_IP6: | |
37 | return sprintf(page, "ipv6\n"); | |
38 | case NVMF_ADDR_FAMILY_IB: | |
39 | return sprintf(page, "ib\n"); | |
885aa401 JS |
40 | case NVMF_ADDR_FAMILY_FC: |
41 | return sprintf(page, "fc\n"); | |
a07b4970 CH |
42 | default: |
43 | return sprintf(page, "\n"); | |
44 | } | |
45 | } | |
46 | ||
47 | static ssize_t nvmet_addr_adrfam_store(struct config_item *item, | |
48 | const char *page, size_t count) | |
49 | { | |
50 | struct nvmet_port *port = to_nvmet_port(item); | |
51 | ||
52 | if (port->enabled) { | |
53 | pr_err("Cannot modify address while enabled\n"); | |
54 | pr_err("Disable the address before modifying\n"); | |
55 | return -EACCES; | |
56 | } | |
57 | ||
58 | if (sysfs_streq(page, "ipv4")) { | |
59 | port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP4; | |
60 | } else if (sysfs_streq(page, "ipv6")) { | |
61 | port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IP6; | |
62 | } else if (sysfs_streq(page, "ib")) { | |
63 | port->disc_addr.adrfam = NVMF_ADDR_FAMILY_IB; | |
885aa401 JS |
64 | } else if (sysfs_streq(page, "fc")) { |
65 | port->disc_addr.adrfam = NVMF_ADDR_FAMILY_FC; | |
a07b4970 CH |
66 | } else { |
67 | pr_err("Invalid value '%s' for adrfam\n", page); | |
68 | return -EINVAL; | |
69 | } | |
70 | ||
71 | return count; | |
72 | } | |
73 | ||
74 | CONFIGFS_ATTR(nvmet_, addr_adrfam); | |
75 | ||
76 | static ssize_t nvmet_addr_portid_show(struct config_item *item, | |
77 | char *page) | |
78 | { | |
79 | struct nvmet_port *port = to_nvmet_port(item); | |
80 | ||
81 | return snprintf(page, PAGE_SIZE, "%d\n", | |
82 | le16_to_cpu(port->disc_addr.portid)); | |
83 | } | |
84 | ||
85 | static ssize_t nvmet_addr_portid_store(struct config_item *item, | |
86 | const char *page, size_t count) | |
87 | { | |
88 | struct nvmet_port *port = to_nvmet_port(item); | |
89 | u16 portid = 0; | |
90 | ||
91 | if (kstrtou16(page, 0, &portid)) { | |
92 | pr_err("Invalid value '%s' for portid\n", page); | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
96 | if (port->enabled) { | |
97 | pr_err("Cannot modify address while enabled\n"); | |
98 | pr_err("Disable the address before modifying\n"); | |
99 | return -EACCES; | |
100 | } | |
101 | port->disc_addr.portid = cpu_to_le16(portid); | |
102 | return count; | |
103 | } | |
104 | ||
105 | CONFIGFS_ATTR(nvmet_, addr_portid); | |
106 | ||
107 | static ssize_t nvmet_addr_traddr_show(struct config_item *item, | |
108 | char *page) | |
109 | { | |
110 | struct nvmet_port *port = to_nvmet_port(item); | |
111 | ||
112 | return snprintf(page, PAGE_SIZE, "%s\n", | |
113 | port->disc_addr.traddr); | |
114 | } | |
115 | ||
116 | static ssize_t nvmet_addr_traddr_store(struct config_item *item, | |
117 | const char *page, size_t count) | |
118 | { | |
119 | struct nvmet_port *port = to_nvmet_port(item); | |
120 | ||
121 | if (count > NVMF_TRADDR_SIZE) { | |
122 | pr_err("Invalid value '%s' for traddr\n", page); | |
123 | return -EINVAL; | |
124 | } | |
125 | ||
126 | if (port->enabled) { | |
127 | pr_err("Cannot modify address while enabled\n"); | |
128 | pr_err("Disable the address before modifying\n"); | |
129 | return -EACCES; | |
130 | } | |
131 | return snprintf(port->disc_addr.traddr, | |
132 | sizeof(port->disc_addr.traddr), "%s", page); | |
133 | } | |
134 | ||
135 | CONFIGFS_ATTR(nvmet_, addr_traddr); | |
136 | ||
137 | static ssize_t nvmet_addr_treq_show(struct config_item *item, | |
138 | char *page) | |
139 | { | |
140 | switch (to_nvmet_port(item)->disc_addr.treq) { | |
141 | case NVMF_TREQ_NOT_SPECIFIED: | |
142 | return sprintf(page, "not specified\n"); | |
143 | case NVMF_TREQ_REQUIRED: | |
144 | return sprintf(page, "required\n"); | |
145 | case NVMF_TREQ_NOT_REQUIRED: | |
146 | return sprintf(page, "not required\n"); | |
147 | default: | |
148 | return sprintf(page, "\n"); | |
149 | } | |
150 | } | |
151 | ||
152 | static ssize_t nvmet_addr_treq_store(struct config_item *item, | |
153 | const char *page, size_t count) | |
154 | { | |
155 | struct nvmet_port *port = to_nvmet_port(item); | |
156 | ||
157 | if (port->enabled) { | |
158 | pr_err("Cannot modify address while enabled\n"); | |
159 | pr_err("Disable the address before modifying\n"); | |
160 | return -EACCES; | |
161 | } | |
162 | ||
163 | if (sysfs_streq(page, "not specified")) { | |
164 | port->disc_addr.treq = NVMF_TREQ_NOT_SPECIFIED; | |
165 | } else if (sysfs_streq(page, "required")) { | |
166 | port->disc_addr.treq = NVMF_TREQ_REQUIRED; | |
167 | } else if (sysfs_streq(page, "not required")) { | |
168 | port->disc_addr.treq = NVMF_TREQ_NOT_REQUIRED; | |
169 | } else { | |
170 | pr_err("Invalid value '%s' for treq\n", page); | |
171 | return -EINVAL; | |
172 | } | |
173 | ||
174 | return count; | |
175 | } | |
176 | ||
177 | CONFIGFS_ATTR(nvmet_, addr_treq); | |
178 | ||
179 | static ssize_t nvmet_addr_trsvcid_show(struct config_item *item, | |
180 | char *page) | |
181 | { | |
182 | struct nvmet_port *port = to_nvmet_port(item); | |
183 | ||
184 | return snprintf(page, PAGE_SIZE, "%s\n", | |
185 | port->disc_addr.trsvcid); | |
186 | } | |
187 | ||
188 | static ssize_t nvmet_addr_trsvcid_store(struct config_item *item, | |
189 | const char *page, size_t count) | |
190 | { | |
191 | struct nvmet_port *port = to_nvmet_port(item); | |
192 | ||
193 | if (count > NVMF_TRSVCID_SIZE) { | |
194 | pr_err("Invalid value '%s' for trsvcid\n", page); | |
195 | return -EINVAL; | |
196 | } | |
197 | if (port->enabled) { | |
198 | pr_err("Cannot modify address while enabled\n"); | |
199 | pr_err("Disable the address before modifying\n"); | |
200 | return -EACCES; | |
201 | } | |
202 | return snprintf(port->disc_addr.trsvcid, | |
203 | sizeof(port->disc_addr.trsvcid), "%s", page); | |
204 | } | |
205 | ||
206 | CONFIGFS_ATTR(nvmet_, addr_trsvcid); | |
207 | ||
208 | static ssize_t nvmet_addr_trtype_show(struct config_item *item, | |
209 | char *page) | |
210 | { | |
211 | switch (to_nvmet_port(item)->disc_addr.trtype) { | |
212 | case NVMF_TRTYPE_RDMA: | |
213 | return sprintf(page, "rdma\n"); | |
214 | case NVMF_TRTYPE_LOOP: | |
215 | return sprintf(page, "loop\n"); | |
885aa401 JS |
216 | case NVMF_TRTYPE_FC: |
217 | return sprintf(page, "fc\n"); | |
a07b4970 CH |
218 | default: |
219 | return sprintf(page, "\n"); | |
220 | } | |
221 | } | |
222 | ||
223 | static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) | |
224 | { | |
225 | port->disc_addr.trtype = NVMF_TRTYPE_RDMA; | |
226 | memset(&port->disc_addr.tsas.rdma, 0, NVMF_TSAS_SIZE); | |
227 | port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED; | |
228 | port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED; | |
229 | port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM; | |
230 | } | |
231 | ||
232 | static void nvmet_port_init_tsas_loop(struct nvmet_port *port) | |
233 | { | |
234 | port->disc_addr.trtype = NVMF_TRTYPE_LOOP; | |
235 | memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); | |
236 | } | |
237 | ||
885aa401 JS |
238 | static void nvmet_port_init_tsas_fc(struct nvmet_port *port) |
239 | { | |
240 | port->disc_addr.trtype = NVMF_TRTYPE_FC; | |
241 | memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); | |
242 | } | |
243 | ||
a07b4970 CH |
244 | static ssize_t nvmet_addr_trtype_store(struct config_item *item, |
245 | const char *page, size_t count) | |
246 | { | |
247 | struct nvmet_port *port = to_nvmet_port(item); | |
248 | ||
249 | if (port->enabled) { | |
250 | pr_err("Cannot modify address while enabled\n"); | |
251 | pr_err("Disable the address before modifying\n"); | |
252 | return -EACCES; | |
253 | } | |
254 | ||
255 | if (sysfs_streq(page, "rdma")) { | |
256 | nvmet_port_init_tsas_rdma(port); | |
257 | } else if (sysfs_streq(page, "loop")) { | |
258 | nvmet_port_init_tsas_loop(port); | |
885aa401 JS |
259 | } else if (sysfs_streq(page, "fc")) { |
260 | nvmet_port_init_tsas_fc(port); | |
a07b4970 CH |
261 | } else { |
262 | pr_err("Invalid value '%s' for trtype\n", page); | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | return count; | |
267 | } | |
268 | ||
269 | CONFIGFS_ATTR(nvmet_, addr_trtype); | |
270 | ||
271 | /* | |
272 | * Namespace structures & file operation functions below | |
273 | */ | |
274 | static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page) | |
275 | { | |
276 | return sprintf(page, "%s\n", to_nvmet_ns(item)->device_path); | |
277 | } | |
278 | ||
279 | static ssize_t nvmet_ns_device_path_store(struct config_item *item, | |
280 | const char *page, size_t count) | |
281 | { | |
282 | struct nvmet_ns *ns = to_nvmet_ns(item); | |
283 | struct nvmet_subsys *subsys = ns->subsys; | |
284 | int ret; | |
285 | ||
286 | mutex_lock(&subsys->lock); | |
287 | ret = -EBUSY; | |
e4fcf07c | 288 | if (ns->enabled) |
a07b4970 CH |
289 | goto out_unlock; |
290 | ||
291 | kfree(ns->device_path); | |
292 | ||
293 | ret = -ENOMEM; | |
294 | ns->device_path = kstrdup(page, GFP_KERNEL); | |
295 | if (!ns->device_path) | |
296 | goto out_unlock; | |
297 | ||
298 | mutex_unlock(&subsys->lock); | |
299 | return count; | |
300 | ||
301 | out_unlock: | |
302 | mutex_unlock(&subsys->lock); | |
303 | return ret; | |
304 | } | |
305 | ||
306 | CONFIGFS_ATTR(nvmet_ns_, device_path); | |
307 | ||
308 | static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page) | |
309 | { | |
310 | return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid); | |
311 | } | |
312 | ||
313 | static ssize_t nvmet_ns_device_nguid_store(struct config_item *item, | |
314 | const char *page, size_t count) | |
315 | { | |
316 | struct nvmet_ns *ns = to_nvmet_ns(item); | |
317 | struct nvmet_subsys *subsys = ns->subsys; | |
318 | u8 nguid[16]; | |
319 | const char *p = page; | |
320 | int i; | |
321 | int ret = 0; | |
322 | ||
323 | mutex_lock(&subsys->lock); | |
e4fcf07c | 324 | if (ns->enabled) { |
a07b4970 CH |
325 | ret = -EBUSY; |
326 | goto out_unlock; | |
327 | } | |
328 | ||
329 | for (i = 0; i < 16; i++) { | |
330 | if (p + 2 > page + count) { | |
331 | ret = -EINVAL; | |
332 | goto out_unlock; | |
333 | } | |
334 | if (!isxdigit(p[0]) || !isxdigit(p[1])) { | |
335 | ret = -EINVAL; | |
336 | goto out_unlock; | |
337 | } | |
338 | ||
339 | nguid[i] = (hex_to_bin(p[0]) << 4) | hex_to_bin(p[1]); | |
340 | p += 2; | |
341 | ||
342 | if (*p == '-' || *p == ':') | |
343 | p++; | |
344 | } | |
345 | ||
346 | memcpy(&ns->nguid, nguid, sizeof(nguid)); | |
347 | out_unlock: | |
348 | mutex_unlock(&subsys->lock); | |
349 | return ret ? ret : count; | |
350 | } | |
351 | ||
352 | CONFIGFS_ATTR(nvmet_ns_, device_nguid); | |
353 | ||
354 | static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page) | |
355 | { | |
e4fcf07c | 356 | return sprintf(page, "%d\n", to_nvmet_ns(item)->enabled); |
a07b4970 CH |
357 | } |
358 | ||
359 | static ssize_t nvmet_ns_enable_store(struct config_item *item, | |
360 | const char *page, size_t count) | |
361 | { | |
362 | struct nvmet_ns *ns = to_nvmet_ns(item); | |
363 | bool enable; | |
364 | int ret = 0; | |
365 | ||
366 | if (strtobool(page, &enable)) | |
367 | return -EINVAL; | |
368 | ||
369 | if (enable) | |
370 | ret = nvmet_ns_enable(ns); | |
371 | else | |
372 | nvmet_ns_disable(ns); | |
373 | ||
374 | return ret ? ret : count; | |
375 | } | |
376 | ||
377 | CONFIGFS_ATTR(nvmet_ns_, enable); | |
378 | ||
379 | static struct configfs_attribute *nvmet_ns_attrs[] = { | |
380 | &nvmet_ns_attr_device_path, | |
381 | &nvmet_ns_attr_device_nguid, | |
382 | &nvmet_ns_attr_enable, | |
383 | NULL, | |
384 | }; | |
385 | ||
386 | static void nvmet_ns_release(struct config_item *item) | |
387 | { | |
388 | struct nvmet_ns *ns = to_nvmet_ns(item); | |
389 | ||
390 | nvmet_ns_free(ns); | |
391 | } | |
392 | ||
393 | static struct configfs_item_operations nvmet_ns_item_ops = { | |
394 | .release = nvmet_ns_release, | |
395 | }; | |
396 | ||
397 | static struct config_item_type nvmet_ns_type = { | |
398 | .ct_item_ops = &nvmet_ns_item_ops, | |
399 | .ct_attrs = nvmet_ns_attrs, | |
400 | .ct_owner = THIS_MODULE, | |
401 | }; | |
402 | ||
403 | static struct config_group *nvmet_ns_make(struct config_group *group, | |
404 | const char *name) | |
405 | { | |
406 | struct nvmet_subsys *subsys = namespaces_to_subsys(&group->cg_item); | |
407 | struct nvmet_ns *ns; | |
408 | int ret; | |
409 | u32 nsid; | |
410 | ||
411 | ret = kstrtou32(name, 0, &nsid); | |
412 | if (ret) | |
413 | goto out; | |
414 | ||
415 | ret = -EINVAL; | |
416 | if (nsid == 0 || nsid == 0xffffffff) | |
417 | goto out; | |
418 | ||
419 | ret = -ENOMEM; | |
420 | ns = nvmet_ns_alloc(subsys, nsid); | |
421 | if (!ns) | |
422 | goto out; | |
423 | config_group_init_type_name(&ns->group, name, &nvmet_ns_type); | |
424 | ||
425 | pr_info("adding nsid %d to subsystem %s\n", nsid, subsys->subsysnqn); | |
426 | ||
427 | return &ns->group; | |
428 | out: | |
429 | return ERR_PTR(ret); | |
430 | } | |
431 | ||
432 | static struct configfs_group_operations nvmet_namespaces_group_ops = { | |
433 | .make_group = nvmet_ns_make, | |
434 | }; | |
435 | ||
436 | static struct config_item_type nvmet_namespaces_type = { | |
437 | .ct_group_ops = &nvmet_namespaces_group_ops, | |
438 | .ct_owner = THIS_MODULE, | |
439 | }; | |
440 | ||
441 | static int nvmet_port_subsys_allow_link(struct config_item *parent, | |
442 | struct config_item *target) | |
443 | { | |
444 | struct nvmet_port *port = to_nvmet_port(parent->ci_parent); | |
445 | struct nvmet_subsys *subsys; | |
446 | struct nvmet_subsys_link *link, *p; | |
447 | int ret; | |
448 | ||
449 | if (target->ci_type != &nvmet_subsys_type) { | |
450 | pr_err("can only link subsystems into the subsystems dir.!\n"); | |
451 | return -EINVAL; | |
452 | } | |
453 | subsys = to_subsys(target); | |
454 | link = kmalloc(sizeof(*link), GFP_KERNEL); | |
455 | if (!link) | |
456 | return -ENOMEM; | |
457 | link->subsys = subsys; | |
458 | ||
459 | down_write(&nvmet_config_sem); | |
460 | ret = -EEXIST; | |
461 | list_for_each_entry(p, &port->subsystems, entry) { | |
462 | if (p->subsys == subsys) | |
463 | goto out_free_link; | |
464 | } | |
465 | ||
466 | if (list_empty(&port->subsystems)) { | |
467 | ret = nvmet_enable_port(port); | |
468 | if (ret) | |
469 | goto out_free_link; | |
470 | } | |
471 | ||
472 | list_add_tail(&link->entry, &port->subsystems); | |
473 | nvmet_genctr++; | |
474 | up_write(&nvmet_config_sem); | |
475 | return 0; | |
476 | ||
477 | out_free_link: | |
478 | up_write(&nvmet_config_sem); | |
479 | kfree(link); | |
480 | return ret; | |
481 | } | |
482 | ||
e16769d4 | 483 | static void nvmet_port_subsys_drop_link(struct config_item *parent, |
a07b4970 CH |
484 | struct config_item *target) |
485 | { | |
486 | struct nvmet_port *port = to_nvmet_port(parent->ci_parent); | |
487 | struct nvmet_subsys *subsys = to_subsys(target); | |
488 | struct nvmet_subsys_link *p; | |
489 | ||
490 | down_write(&nvmet_config_sem); | |
491 | list_for_each_entry(p, &port->subsystems, entry) { | |
492 | if (p->subsys == subsys) | |
493 | goto found; | |
494 | } | |
495 | up_write(&nvmet_config_sem); | |
e16769d4 | 496 | return; |
a07b4970 CH |
497 | |
498 | found: | |
499 | list_del(&p->entry); | |
500 | nvmet_genctr++; | |
501 | if (list_empty(&port->subsystems)) | |
502 | nvmet_disable_port(port); | |
503 | up_write(&nvmet_config_sem); | |
504 | kfree(p); | |
a07b4970 CH |
505 | } |
506 | ||
507 | static struct configfs_item_operations nvmet_port_subsys_item_ops = { | |
508 | .allow_link = nvmet_port_subsys_allow_link, | |
509 | .drop_link = nvmet_port_subsys_drop_link, | |
510 | }; | |
511 | ||
512 | static struct config_item_type nvmet_port_subsys_type = { | |
513 | .ct_item_ops = &nvmet_port_subsys_item_ops, | |
514 | .ct_owner = THIS_MODULE, | |
515 | }; | |
516 | ||
517 | static int nvmet_allowed_hosts_allow_link(struct config_item *parent, | |
518 | struct config_item *target) | |
519 | { | |
520 | struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); | |
521 | struct nvmet_host *host; | |
522 | struct nvmet_host_link *link, *p; | |
523 | int ret; | |
524 | ||
525 | if (target->ci_type != &nvmet_host_type) { | |
526 | pr_err("can only link hosts into the allowed_hosts directory!\n"); | |
527 | return -EINVAL; | |
528 | } | |
529 | ||
530 | host = to_host(target); | |
531 | link = kmalloc(sizeof(*link), GFP_KERNEL); | |
532 | if (!link) | |
533 | return -ENOMEM; | |
534 | link->host = host; | |
535 | ||
536 | down_write(&nvmet_config_sem); | |
537 | ret = -EINVAL; | |
538 | if (subsys->allow_any_host) { | |
539 | pr_err("can't add hosts when allow_any_host is set!\n"); | |
540 | goto out_free_link; | |
541 | } | |
542 | ||
543 | ret = -EEXIST; | |
544 | list_for_each_entry(p, &subsys->hosts, entry) { | |
545 | if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) | |
546 | goto out_free_link; | |
547 | } | |
548 | list_add_tail(&link->entry, &subsys->hosts); | |
549 | nvmet_genctr++; | |
550 | up_write(&nvmet_config_sem); | |
551 | return 0; | |
552 | out_free_link: | |
553 | up_write(&nvmet_config_sem); | |
554 | kfree(link); | |
555 | return ret; | |
556 | } | |
557 | ||
e16769d4 | 558 | static void nvmet_allowed_hosts_drop_link(struct config_item *parent, |
a07b4970 CH |
559 | struct config_item *target) |
560 | { | |
561 | struct nvmet_subsys *subsys = to_subsys(parent->ci_parent); | |
562 | struct nvmet_host *host = to_host(target); | |
563 | struct nvmet_host_link *p; | |
564 | ||
565 | down_write(&nvmet_config_sem); | |
566 | list_for_each_entry(p, &subsys->hosts, entry) { | |
567 | if (!strcmp(nvmet_host_name(p->host), nvmet_host_name(host))) | |
568 | goto found; | |
569 | } | |
570 | up_write(&nvmet_config_sem); | |
e16769d4 | 571 | return; |
a07b4970 CH |
572 | |
573 | found: | |
574 | list_del(&p->entry); | |
575 | nvmet_genctr++; | |
576 | up_write(&nvmet_config_sem); | |
577 | kfree(p); | |
a07b4970 CH |
578 | } |
579 | ||
580 | static struct configfs_item_operations nvmet_allowed_hosts_item_ops = { | |
581 | .allow_link = nvmet_allowed_hosts_allow_link, | |
582 | .drop_link = nvmet_allowed_hosts_drop_link, | |
583 | }; | |
584 | ||
585 | static struct config_item_type nvmet_allowed_hosts_type = { | |
586 | .ct_item_ops = &nvmet_allowed_hosts_item_ops, | |
587 | .ct_owner = THIS_MODULE, | |
588 | }; | |
589 | ||
590 | static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item, | |
591 | char *page) | |
592 | { | |
593 | return snprintf(page, PAGE_SIZE, "%d\n", | |
594 | to_subsys(item)->allow_any_host); | |
595 | } | |
596 | ||
597 | static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, | |
598 | const char *page, size_t count) | |
599 | { | |
600 | struct nvmet_subsys *subsys = to_subsys(item); | |
601 | bool allow_any_host; | |
602 | int ret = 0; | |
603 | ||
604 | if (strtobool(page, &allow_any_host)) | |
605 | return -EINVAL; | |
606 | ||
607 | down_write(&nvmet_config_sem); | |
608 | if (allow_any_host && !list_empty(&subsys->hosts)) { | |
609 | pr_err("Can't set allow_any_host when explicit hosts are set!\n"); | |
610 | ret = -EINVAL; | |
611 | goto out_unlock; | |
612 | } | |
613 | ||
614 | subsys->allow_any_host = allow_any_host; | |
615 | out_unlock: | |
616 | up_write(&nvmet_config_sem); | |
617 | return ret ? ret : count; | |
618 | } | |
619 | ||
620 | CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); | |
621 | ||
622 | static struct configfs_attribute *nvmet_subsys_attrs[] = { | |
623 | &nvmet_subsys_attr_attr_allow_any_host, | |
624 | NULL, | |
625 | }; | |
626 | ||
627 | /* | |
628 | * Subsystem structures & folder operation functions below | |
629 | */ | |
630 | static void nvmet_subsys_release(struct config_item *item) | |
631 | { | |
632 | struct nvmet_subsys *subsys = to_subsys(item); | |
633 | ||
344770b0 | 634 | nvmet_subsys_del_ctrls(subsys); |
a07b4970 CH |
635 | nvmet_subsys_put(subsys); |
636 | } | |
637 | ||
638 | static struct configfs_item_operations nvmet_subsys_item_ops = { | |
639 | .release = nvmet_subsys_release, | |
640 | }; | |
641 | ||
642 | static struct config_item_type nvmet_subsys_type = { | |
643 | .ct_item_ops = &nvmet_subsys_item_ops, | |
644 | .ct_attrs = nvmet_subsys_attrs, | |
645 | .ct_owner = THIS_MODULE, | |
646 | }; | |
647 | ||
648 | static struct config_group *nvmet_subsys_make(struct config_group *group, | |
649 | const char *name) | |
650 | { | |
651 | struct nvmet_subsys *subsys; | |
652 | ||
653 | if (sysfs_streq(name, NVME_DISC_SUBSYS_NAME)) { | |
654 | pr_err("can't create discovery subsystem through configfs\n"); | |
655 | return ERR_PTR(-EINVAL); | |
656 | } | |
657 | ||
658 | subsys = nvmet_subsys_alloc(name, NVME_NQN_NVME); | |
659 | if (!subsys) | |
660 | return ERR_PTR(-ENOMEM); | |
661 | ||
662 | config_group_init_type_name(&subsys->group, name, &nvmet_subsys_type); | |
663 | ||
664 | config_group_init_type_name(&subsys->namespaces_group, | |
665 | "namespaces", &nvmet_namespaces_type); | |
666 | configfs_add_default_group(&subsys->namespaces_group, &subsys->group); | |
667 | ||
668 | config_group_init_type_name(&subsys->allowed_hosts_group, | |
669 | "allowed_hosts", &nvmet_allowed_hosts_type); | |
670 | configfs_add_default_group(&subsys->allowed_hosts_group, | |
671 | &subsys->group); | |
672 | ||
673 | return &subsys->group; | |
674 | } | |
675 | ||
676 | static struct configfs_group_operations nvmet_subsystems_group_ops = { | |
677 | .make_group = nvmet_subsys_make, | |
678 | }; | |
679 | ||
680 | static struct config_item_type nvmet_subsystems_type = { | |
681 | .ct_group_ops = &nvmet_subsystems_group_ops, | |
682 | .ct_owner = THIS_MODULE, | |
683 | }; | |
684 | ||
685 | static ssize_t nvmet_referral_enable_show(struct config_item *item, | |
686 | char *page) | |
687 | { | |
688 | return snprintf(page, PAGE_SIZE, "%d\n", to_nvmet_port(item)->enabled); | |
689 | } | |
690 | ||
691 | static ssize_t nvmet_referral_enable_store(struct config_item *item, | |
692 | const char *page, size_t count) | |
693 | { | |
694 | struct nvmet_port *parent = to_nvmet_port(item->ci_parent->ci_parent); | |
695 | struct nvmet_port *port = to_nvmet_port(item); | |
696 | bool enable; | |
697 | ||
698 | if (strtobool(page, &enable)) | |
699 | goto inval; | |
700 | ||
701 | if (enable) | |
702 | nvmet_referral_enable(parent, port); | |
703 | else | |
704 | nvmet_referral_disable(port); | |
705 | ||
706 | return count; | |
707 | inval: | |
708 | pr_err("Invalid value '%s' for enable\n", page); | |
709 | return -EINVAL; | |
710 | } | |
711 | ||
712 | CONFIGFS_ATTR(nvmet_referral_, enable); | |
713 | ||
714 | /* | |
715 | * Discovery Service subsystem definitions | |
716 | */ | |
717 | static struct configfs_attribute *nvmet_referral_attrs[] = { | |
718 | &nvmet_attr_addr_adrfam, | |
719 | &nvmet_attr_addr_portid, | |
720 | &nvmet_attr_addr_treq, | |
721 | &nvmet_attr_addr_traddr, | |
722 | &nvmet_attr_addr_trsvcid, | |
723 | &nvmet_attr_addr_trtype, | |
724 | &nvmet_referral_attr_enable, | |
725 | NULL, | |
726 | }; | |
727 | ||
728 | static void nvmet_referral_release(struct config_item *item) | |
729 | { | |
730 | struct nvmet_port *port = to_nvmet_port(item); | |
731 | ||
732 | nvmet_referral_disable(port); | |
733 | kfree(port); | |
734 | } | |
735 | ||
736 | static struct configfs_item_operations nvmet_referral_item_ops = { | |
737 | .release = nvmet_referral_release, | |
738 | }; | |
739 | ||
740 | static struct config_item_type nvmet_referral_type = { | |
741 | .ct_owner = THIS_MODULE, | |
742 | .ct_attrs = nvmet_referral_attrs, | |
743 | .ct_item_ops = &nvmet_referral_item_ops, | |
744 | }; | |
745 | ||
746 | static struct config_group *nvmet_referral_make( | |
747 | struct config_group *group, const char *name) | |
748 | { | |
749 | struct nvmet_port *port; | |
750 | ||
751 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
752 | if (!port) | |
f98d9ca1 | 753 | return ERR_PTR(-ENOMEM); |
a07b4970 CH |
754 | |
755 | INIT_LIST_HEAD(&port->entry); | |
756 | config_group_init_type_name(&port->group, name, &nvmet_referral_type); | |
757 | ||
758 | return &port->group; | |
759 | } | |
760 | ||
761 | static struct configfs_group_operations nvmet_referral_group_ops = { | |
762 | .make_group = nvmet_referral_make, | |
763 | }; | |
764 | ||
765 | static struct config_item_type nvmet_referrals_type = { | |
766 | .ct_owner = THIS_MODULE, | |
767 | .ct_group_ops = &nvmet_referral_group_ops, | |
768 | }; | |
769 | ||
770 | /* | |
771 | * Ports definitions. | |
772 | */ | |
773 | static void nvmet_port_release(struct config_item *item) | |
774 | { | |
775 | struct nvmet_port *port = to_nvmet_port(item); | |
776 | ||
777 | kfree(port); | |
778 | } | |
779 | ||
780 | static struct configfs_attribute *nvmet_port_attrs[] = { | |
781 | &nvmet_attr_addr_adrfam, | |
782 | &nvmet_attr_addr_treq, | |
783 | &nvmet_attr_addr_traddr, | |
784 | &nvmet_attr_addr_trsvcid, | |
785 | &nvmet_attr_addr_trtype, | |
786 | NULL, | |
787 | }; | |
788 | ||
789 | static struct configfs_item_operations nvmet_port_item_ops = { | |
790 | .release = nvmet_port_release, | |
791 | }; | |
792 | ||
793 | static struct config_item_type nvmet_port_type = { | |
794 | .ct_attrs = nvmet_port_attrs, | |
795 | .ct_item_ops = &nvmet_port_item_ops, | |
796 | .ct_owner = THIS_MODULE, | |
797 | }; | |
798 | ||
799 | static struct config_group *nvmet_ports_make(struct config_group *group, | |
800 | const char *name) | |
801 | { | |
802 | struct nvmet_port *port; | |
803 | u16 portid; | |
804 | ||
805 | if (kstrtou16(name, 0, &portid)) | |
806 | return ERR_PTR(-EINVAL); | |
807 | ||
808 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
809 | if (!port) | |
f98d9ca1 | 810 | return ERR_PTR(-ENOMEM); |
a07b4970 CH |
811 | |
812 | INIT_LIST_HEAD(&port->entry); | |
813 | INIT_LIST_HEAD(&port->subsystems); | |
814 | INIT_LIST_HEAD(&port->referrals); | |
815 | ||
816 | port->disc_addr.portid = cpu_to_le16(portid); | |
817 | config_group_init_type_name(&port->group, name, &nvmet_port_type); | |
818 | ||
819 | config_group_init_type_name(&port->subsys_group, | |
820 | "subsystems", &nvmet_port_subsys_type); | |
821 | configfs_add_default_group(&port->subsys_group, &port->group); | |
822 | ||
823 | config_group_init_type_name(&port->referrals_group, | |
824 | "referrals", &nvmet_referrals_type); | |
825 | configfs_add_default_group(&port->referrals_group, &port->group); | |
826 | ||
827 | return &port->group; | |
828 | } | |
829 | ||
830 | static struct configfs_group_operations nvmet_ports_group_ops = { | |
831 | .make_group = nvmet_ports_make, | |
832 | }; | |
833 | ||
834 | static struct config_item_type nvmet_ports_type = { | |
835 | .ct_group_ops = &nvmet_ports_group_ops, | |
836 | .ct_owner = THIS_MODULE, | |
837 | }; | |
838 | ||
839 | static struct config_group nvmet_subsystems_group; | |
840 | static struct config_group nvmet_ports_group; | |
841 | ||
842 | static void nvmet_host_release(struct config_item *item) | |
843 | { | |
844 | struct nvmet_host *host = to_host(item); | |
845 | ||
846 | kfree(host); | |
847 | } | |
848 | ||
849 | static struct configfs_item_operations nvmet_host_item_ops = { | |
850 | .release = nvmet_host_release, | |
851 | }; | |
852 | ||
853 | static struct config_item_type nvmet_host_type = { | |
854 | .ct_item_ops = &nvmet_host_item_ops, | |
855 | .ct_owner = THIS_MODULE, | |
856 | }; | |
857 | ||
858 | static struct config_group *nvmet_hosts_make_group(struct config_group *group, | |
859 | const char *name) | |
860 | { | |
861 | struct nvmet_host *host; | |
862 | ||
863 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
864 | if (!host) | |
865 | return ERR_PTR(-ENOMEM); | |
866 | ||
867 | config_group_init_type_name(&host->group, name, &nvmet_host_type); | |
868 | ||
869 | return &host->group; | |
870 | } | |
871 | ||
872 | static struct configfs_group_operations nvmet_hosts_group_ops = { | |
873 | .make_group = nvmet_hosts_make_group, | |
874 | }; | |
875 | ||
876 | static struct config_item_type nvmet_hosts_type = { | |
877 | .ct_group_ops = &nvmet_hosts_group_ops, | |
878 | .ct_owner = THIS_MODULE, | |
879 | }; | |
880 | ||
881 | static struct config_group nvmet_hosts_group; | |
882 | ||
883 | static struct config_item_type nvmet_root_type = { | |
884 | .ct_owner = THIS_MODULE, | |
885 | }; | |
886 | ||
887 | static struct configfs_subsystem nvmet_configfs_subsystem = { | |
888 | .su_group = { | |
889 | .cg_item = { | |
890 | .ci_namebuf = "nvmet", | |
891 | .ci_type = &nvmet_root_type, | |
892 | }, | |
893 | }, | |
894 | }; | |
895 | ||
896 | int __init nvmet_init_configfs(void) | |
897 | { | |
898 | int ret; | |
899 | ||
900 | config_group_init(&nvmet_configfs_subsystem.su_group); | |
901 | mutex_init(&nvmet_configfs_subsystem.su_mutex); | |
902 | ||
903 | config_group_init_type_name(&nvmet_subsystems_group, | |
904 | "subsystems", &nvmet_subsystems_type); | |
905 | configfs_add_default_group(&nvmet_subsystems_group, | |
906 | &nvmet_configfs_subsystem.su_group); | |
907 | ||
908 | config_group_init_type_name(&nvmet_ports_group, | |
909 | "ports", &nvmet_ports_type); | |
910 | configfs_add_default_group(&nvmet_ports_group, | |
911 | &nvmet_configfs_subsystem.su_group); | |
912 | ||
913 | config_group_init_type_name(&nvmet_hosts_group, | |
914 | "hosts", &nvmet_hosts_type); | |
915 | configfs_add_default_group(&nvmet_hosts_group, | |
916 | &nvmet_configfs_subsystem.su_group); | |
917 | ||
918 | ret = configfs_register_subsystem(&nvmet_configfs_subsystem); | |
919 | if (ret) { | |
920 | pr_err("configfs_register_subsystem: %d\n", ret); | |
921 | return ret; | |
922 | } | |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
927 | void __exit nvmet_exit_configfs(void) | |
928 | { | |
929 | configfs_unregister_subsystem(&nvmet_configfs_subsystem); | |
930 | } |