1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Configfs interface for the NVMe target. |
4 | * Copyright (c) 2015-2016 HGST, a Western Digital Company. |
5 | */ |
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
7 | #include <linux/kstrtox.h> |
8 | #include <linux/kernel.h> |
9 | #include <linux/module.h> |
10 | #include <linux/slab.h> |
11 | #include <linux/stat.h> |
12 | #include <linux/ctype.h> |
13 | #include <linux/pci.h> |
14 | #include <linux/pci-p2pdma.h> |
15 | #ifdef CONFIG_NVME_TARGET_AUTH |
16 | #include <linux/nvme-auth.h> |
17 | #endif |
18 | #include <linux/nvme-keyring.h> |
19 | #include <crypto/hash.h> |
20 | #include <crypto/kpp.h> |
21 | |
22 | #include "nvmet.h" |
23 | |
24 | static const struct config_item_type nvmet_host_type; |
25 | static const struct config_item_type nvmet_subsys_type; |
26 | |
27 | static LIST_HEAD(nvmet_ports_list); |
28 | struct list_head *nvmet_ports = &nvmet_ports_list; |
29 | |
30 | struct nvmet_type_name_map { |
31 | u8 type; |
32 | const char *name; |
33 | }; |
34 | |
35 | static struct nvmet_type_name_map nvmet_transport[] = { |
36 | { NVMF_TRTYPE_RDMA, "rdma" }, |
37 | { NVMF_TRTYPE_FC, "fc" }, |
38 | { NVMF_TRTYPE_TCP, "tcp" }, |
39 | { NVMF_TRTYPE_LOOP, "loop" }, |
40 | }; |
41 | |
42 | static const struct nvmet_type_name_map nvmet_addr_family[] = { |
43 | { NVMF_ADDR_FAMILY_PCI, "pcie" }, |
44 | { NVMF_ADDR_FAMILY_IP4, "ipv4" }, |
45 | { NVMF_ADDR_FAMILY_IP6, "ipv6" }, |
46 | { NVMF_ADDR_FAMILY_IB, "ib" }, |
47 | { NVMF_ADDR_FAMILY_FC, "fc" }, |
48 | { NVMF_ADDR_FAMILY_LOOP, "loop" }, |
49 | }; |
50 | |
51 | static bool nvmet_is_port_enabled(struct nvmet_port *p, const char *caller) |
52 | { |
53 | if (p->enabled) |
54 | pr_err("Disable port '%u' before changing attribute in %s\n" , |
55 | le16_to_cpu(p->disc_addr.portid), caller); |
56 | return p->enabled; |
57 | } |
58 | |
59 | /* |
60 | * nvmet_port Generic ConfigFS definitions. |
61 | * Used in any place in the ConfigFS tree that refers to an address. |
62 | */ |
63 | static ssize_t nvmet_addr_adrfam_show(struct config_item *item, char *page) |
64 | { |
65 | u8 adrfam = to_nvmet_port(item)->disc_addr.adrfam; |
66 | int i; |
67 | |
68 | for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { |
69 | if (nvmet_addr_family[i].type == adrfam) |
70 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , |
71 | nvmet_addr_family[i].name); |
72 | } |
73 | |
74 | return snprintf(buf: page, PAGE_SIZE, fmt: "\n" ); |
75 | } |
76 | |
77 | static ssize_t nvmet_addr_adrfam_store(struct config_item *item, |
78 | const char *page, size_t count) |
79 | { |
80 | struct nvmet_port *port = to_nvmet_port(item); |
81 | int i; |
82 | |
83 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
84 | return -EACCES; |
85 | |
86 | for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { |
87 | if (sysfs_streq(s1: page, s2: nvmet_addr_family[i].name)) |
88 | goto found; |
89 | } |
90 | |
91 | pr_err("Invalid value '%s' for adrfam\n" , page); |
92 | return -EINVAL; |
93 | |
94 | found: |
95 | port->disc_addr.adrfam = nvmet_addr_family[i].type; |
96 | return count; |
97 | } |
98 | |
99 | CONFIGFS_ATTR(nvmet_, addr_adrfam); |
100 | |
101 | static ssize_t nvmet_addr_portid_show(struct config_item *item, |
102 | char *page) |
103 | { |
104 | __le16 portid = to_nvmet_port(item)->disc_addr.portid; |
105 | |
106 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , le16_to_cpu(portid)); |
107 | } |
108 | |
109 | static ssize_t nvmet_addr_portid_store(struct config_item *item, |
110 | const char *page, size_t count) |
111 | { |
112 | struct nvmet_port *port = to_nvmet_port(item); |
113 | u16 portid = 0; |
114 | |
115 | if (kstrtou16(s: page, base: 0, res: &portid)) { |
116 | pr_err("Invalid value '%s' for portid\n" , page); |
117 | return -EINVAL; |
118 | } |
119 | |
120 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
121 | return -EACCES; |
122 | |
123 | port->disc_addr.portid = cpu_to_le16(portid); |
124 | return count; |
125 | } |
126 | |
127 | CONFIGFS_ATTR(nvmet_, addr_portid); |
128 | |
129 | static ssize_t nvmet_addr_traddr_show(struct config_item *item, |
130 | char *page) |
131 | { |
132 | struct nvmet_port *port = to_nvmet_port(item); |
133 | |
134 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , port->disc_addr.traddr); |
135 | } |
136 | |
137 | static ssize_t nvmet_addr_traddr_store(struct config_item *item, |
138 | const char *page, size_t count) |
139 | { |
140 | struct nvmet_port *port = to_nvmet_port(item); |
141 | |
142 | if (count > NVMF_TRADDR_SIZE) { |
143 | pr_err("Invalid value '%s' for traddr\n" , page); |
144 | return -EINVAL; |
145 | } |
146 | |
147 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
148 | return -EACCES; |
149 | |
150 | if (sscanf(page, "%s\n" , port->disc_addr.traddr) != 1) |
151 | return -EINVAL; |
152 | return count; |
153 | } |
154 | |
155 | CONFIGFS_ATTR(nvmet_, addr_traddr); |
156 | |
157 | static const struct nvmet_type_name_map nvmet_addr_treq[] = { |
158 | { NVMF_TREQ_NOT_SPECIFIED, "not specified" }, |
159 | { NVMF_TREQ_REQUIRED, "required" }, |
160 | { NVMF_TREQ_NOT_REQUIRED, "not required" }, |
161 | }; |
162 | |
163 | static inline u8 nvmet_port_disc_addr_treq_mask(struct nvmet_port *port) |
164 | { |
165 | return (port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK); |
166 | } |
167 | |
168 | static ssize_t nvmet_addr_treq_show(struct config_item *item, char *page) |
169 | { |
170 | u8 treq = nvmet_port_disc_addr_treq_secure_channel(port: to_nvmet_port(item)); |
171 | int i; |
172 | |
173 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) { |
174 | if (treq == nvmet_addr_treq[i].type) |
175 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , |
176 | nvmet_addr_treq[i].name); |
177 | } |
178 | |
179 | return snprintf(buf: page, PAGE_SIZE, fmt: "\n" ); |
180 | } |
181 | |
182 | static ssize_t nvmet_addr_treq_store(struct config_item *item, |
183 | const char *page, size_t count) |
184 | { |
185 | struct nvmet_port *port = to_nvmet_port(item); |
186 | u8 treq = nvmet_port_disc_addr_treq_mask(port); |
187 | int i; |
188 | |
189 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
190 | return -EACCES; |
191 | |
192 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) { |
193 | if (sysfs_streq(s1: page, s2: nvmet_addr_treq[i].name)) |
194 | goto found; |
195 | } |
196 | |
197 | pr_err("Invalid value '%s' for treq\n" , page); |
198 | return -EINVAL; |
199 | |
200 | found: |
201 | if (port->disc_addr.trtype == NVMF_TRTYPE_TCP && |
202 | port->disc_addr.tsas.tcp.sectype == NVMF_TCP_SECTYPE_TLS13) { |
203 | switch (nvmet_addr_treq[i].type) { |
204 | case NVMF_TREQ_NOT_SPECIFIED: |
205 | pr_debug("treq '%s' not allowed for TLS1.3\n" , |
206 | nvmet_addr_treq[i].name); |
207 | return -EINVAL; |
208 | case NVMF_TREQ_NOT_REQUIRED: |
209 | pr_warn("Allow non-TLS connections while TLS1.3 is enabled\n" ); |
210 | break; |
211 | default: |
212 | break; |
213 | } |
214 | } |
215 | treq |= nvmet_addr_treq[i].type; |
216 | port->disc_addr.treq = treq; |
217 | return count; |
218 | } |
219 | |
220 | CONFIGFS_ATTR(nvmet_, addr_treq); |
221 | |
222 | static ssize_t nvmet_addr_trsvcid_show(struct config_item *item, |
223 | char *page) |
224 | { |
225 | struct nvmet_port *port = to_nvmet_port(item); |
226 | |
227 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , port->disc_addr.trsvcid); |
228 | } |
229 | |
230 | static ssize_t nvmet_addr_trsvcid_store(struct config_item *item, |
231 | const char *page, size_t count) |
232 | { |
233 | struct nvmet_port *port = to_nvmet_port(item); |
234 | |
235 | if (count > NVMF_TRSVCID_SIZE) { |
236 | pr_err("Invalid value '%s' for trsvcid\n" , page); |
237 | return -EINVAL; |
238 | } |
239 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
240 | return -EACCES; |
241 | |
242 | if (sscanf(page, "%s\n" , port->disc_addr.trsvcid) != 1) |
243 | return -EINVAL; |
244 | return count; |
245 | } |
246 | |
247 | CONFIGFS_ATTR(nvmet_, addr_trsvcid); |
248 | |
249 | static ssize_t nvmet_param_inline_data_size_show(struct config_item *item, |
250 | char *page) |
251 | { |
252 | struct nvmet_port *port = to_nvmet_port(item); |
253 | |
254 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , port->inline_data_size); |
255 | } |
256 | |
257 | static ssize_t nvmet_param_inline_data_size_store(struct config_item *item, |
258 | const char *page, size_t count) |
259 | { |
260 | struct nvmet_port *port = to_nvmet_port(item); |
261 | int ret; |
262 | |
263 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
264 | return -EACCES; |
265 | ret = kstrtoint(s: page, base: 0, res: &port->inline_data_size); |
266 | if (ret) { |
267 | pr_err("Invalid value '%s' for inline_data_size\n" , page); |
268 | return -EINVAL; |
269 | } |
270 | return count; |
271 | } |
272 | |
273 | CONFIGFS_ATTR(nvmet_, param_inline_data_size); |
274 | |
275 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
276 | static ssize_t nvmet_param_pi_enable_show(struct config_item *item, |
277 | char *page) |
278 | { |
279 | struct nvmet_port *port = to_nvmet_port(item); |
280 | |
281 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , port->pi_enable); |
282 | } |
283 | |
284 | static ssize_t nvmet_param_pi_enable_store(struct config_item *item, |
285 | const char *page, size_t count) |
286 | { |
287 | struct nvmet_port *port = to_nvmet_port(item); |
288 | bool val; |
289 | |
290 | if (kstrtobool(s: page, res: &val)) |
291 | return -EINVAL; |
292 | |
293 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
294 | return -EACCES; |
295 | |
296 | port->pi_enable = val; |
297 | return count; |
298 | } |
299 | |
300 | CONFIGFS_ATTR(nvmet_, param_pi_enable); |
301 | #endif |
302 | |
303 | static ssize_t nvmet_addr_trtype_show(struct config_item *item, |
304 | char *page) |
305 | { |
306 | struct nvmet_port *port = to_nvmet_port(item); |
307 | int i; |
308 | |
309 | for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { |
310 | if (port->disc_addr.trtype == nvmet_transport[i].type) |
311 | return snprintf(buf: page, PAGE_SIZE, |
312 | fmt: "%s\n" , nvmet_transport[i].name); |
313 | } |
314 | |
315 | return sprintf(buf: page, fmt: "\n" ); |
316 | } |
317 | |
318 | static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) |
319 | { |
320 | port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED; |
321 | port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED; |
322 | port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM; |
323 | } |
324 | |
325 | static void nvmet_port_init_tsas_tcp(struct nvmet_port *port, int sectype) |
326 | { |
327 | port->disc_addr.tsas.tcp.sectype = sectype; |
328 | } |
329 | |
330 | static ssize_t nvmet_addr_trtype_store(struct config_item *item, |
331 | const char *page, size_t count) |
332 | { |
333 | struct nvmet_port *port = to_nvmet_port(item); |
334 | int i; |
335 | |
336 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
337 | return -EACCES; |
338 | |
339 | for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { |
340 | if (sysfs_streq(s1: page, s2: nvmet_transport[i].name)) |
341 | goto found; |
342 | } |
343 | |
344 | pr_err("Invalid value '%s' for trtype\n" , page); |
345 | return -EINVAL; |
346 | |
347 | found: |
348 | memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); |
349 | port->disc_addr.trtype = nvmet_transport[i].type; |
350 | if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) |
351 | nvmet_port_init_tsas_rdma(port); |
352 | else if (port->disc_addr.trtype == NVMF_TRTYPE_TCP) |
353 | nvmet_port_init_tsas_tcp(port, sectype: NVMF_TCP_SECTYPE_NONE); |
354 | return count; |
355 | } |
356 | |
357 | CONFIGFS_ATTR(nvmet_, addr_trtype); |
358 | |
359 | static const struct nvmet_type_name_map nvmet_addr_tsas_tcp[] = { |
360 | { NVMF_TCP_SECTYPE_NONE, "none" }, |
361 | { NVMF_TCP_SECTYPE_TLS13, "tls1.3" }, |
362 | }; |
363 | |
364 | static const struct nvmet_type_name_map nvmet_addr_tsas_rdma[] = { |
365 | { NVMF_RDMA_QPTYPE_CONNECTED, "connected" }, |
366 | { NVMF_RDMA_QPTYPE_DATAGRAM, "datagram" }, |
367 | }; |
368 | |
369 | static ssize_t nvmet_addr_tsas_show(struct config_item *item, |
370 | char *page) |
371 | { |
372 | struct nvmet_port *port = to_nvmet_port(item); |
373 | int i; |
374 | |
375 | if (port->disc_addr.trtype == NVMF_TRTYPE_TCP) { |
376 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_tsas_tcp); i++) { |
377 | if (port->disc_addr.tsas.tcp.sectype == nvmet_addr_tsas_tcp[i].type) |
378 | return sprintf(buf: page, fmt: "%s\n" , nvmet_addr_tsas_tcp[i].name); |
379 | } |
380 | } else if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) { |
381 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_tsas_rdma); i++) { |
382 | if (port->disc_addr.tsas.rdma.qptype == nvmet_addr_tsas_rdma[i].type) |
383 | return sprintf(buf: page, fmt: "%s\n" , nvmet_addr_tsas_rdma[i].name); |
384 | } |
385 | } |
386 | return sprintf(buf: page, fmt: "reserved\n" ); |
387 | } |
388 | |
389 | static ssize_t nvmet_addr_tsas_store(struct config_item *item, |
390 | const char *page, size_t count) |
391 | { |
392 | struct nvmet_port *port = to_nvmet_port(item); |
393 | u8 treq = nvmet_port_disc_addr_treq_mask(port); |
394 | u8 sectype; |
395 | int i; |
396 | |
397 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
398 | return -EACCES; |
399 | |
400 | if (port->disc_addr.trtype != NVMF_TRTYPE_TCP) |
401 | return -EINVAL; |
402 | |
403 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_tsas_tcp); i++) { |
404 | if (sysfs_streq(s1: page, s2: nvmet_addr_tsas_tcp[i].name)) { |
405 | sectype = nvmet_addr_tsas_tcp[i].type; |
406 | goto found; |
407 | } |
408 | } |
409 | |
410 | pr_err("Invalid value '%s' for tsas\n" , page); |
411 | return -EINVAL; |
412 | |
413 | found: |
414 | if (sectype == NVMF_TCP_SECTYPE_TLS13) { |
415 | if (!IS_ENABLED(CONFIG_NVME_TARGET_TCP_TLS)) { |
416 | pr_err("TLS is not supported\n" ); |
417 | return -EINVAL; |
418 | } |
419 | if (!port->keyring) { |
420 | pr_err("TLS keyring not configured\n" ); |
421 | return -EINVAL; |
422 | } |
423 | } |
424 | |
425 | nvmet_port_init_tsas_tcp(port, sectype); |
426 | /* |
427 | * If TLS is enabled TREQ should be set to 'required' per default |
428 | */ |
429 | if (sectype == NVMF_TCP_SECTYPE_TLS13) { |
430 | u8 sc = nvmet_port_disc_addr_treq_secure_channel(port); |
431 | |
432 | if (sc == NVMF_TREQ_NOT_SPECIFIED) |
433 | treq |= NVMF_TREQ_REQUIRED; |
434 | else |
435 | treq |= sc; |
436 | } else { |
437 | treq |= NVMF_TREQ_NOT_SPECIFIED; |
438 | } |
439 | port->disc_addr.treq = treq; |
440 | return count; |
441 | } |
442 | |
443 | CONFIGFS_ATTR(nvmet_, addr_tsas); |
444 | |
445 | /* |
446 | * Namespace structures & file operation functions below |
447 | */ |
448 | static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page) |
449 | { |
450 | return sprintf(buf: page, fmt: "%s\n" , to_nvmet_ns(item)->device_path); |
451 | } |
452 | |
453 | static ssize_t nvmet_ns_device_path_store(struct config_item *item, |
454 | const char *page, size_t count) |
455 | { |
456 | struct nvmet_ns *ns = to_nvmet_ns(item); |
457 | struct nvmet_subsys *subsys = ns->subsys; |
458 | size_t len; |
459 | int ret; |
460 | |
461 | mutex_lock(&subsys->lock); |
462 | ret = -EBUSY; |
463 | if (ns->enabled) |
464 | goto out_unlock; |
465 | |
466 | ret = -EINVAL; |
467 | len = strcspn(page, "\n" ); |
468 | if (!len) |
469 | goto out_unlock; |
470 | |
471 | kfree(objp: ns->device_path); |
472 | ret = -ENOMEM; |
473 | ns->device_path = kmemdup_nul(s: page, len, GFP_KERNEL); |
474 | if (!ns->device_path) |
475 | goto out_unlock; |
476 | |
477 | mutex_unlock(lock: &subsys->lock); |
478 | return count; |
479 | |
480 | out_unlock: |
481 | mutex_unlock(lock: &subsys->lock); |
482 | return ret; |
483 | } |
484 | |
485 | CONFIGFS_ATTR(nvmet_ns_, device_path); |
486 | |
487 | #ifdef CONFIG_PCI_P2PDMA |
488 | static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page) |
489 | { |
490 | struct nvmet_ns *ns = to_nvmet_ns(item); |
491 | |
492 | return pci_p2pdma_enable_show(page, p2p_dev: ns->p2p_dev, use_p2pdma: ns->use_p2pmem); |
493 | } |
494 | |
495 | static ssize_t nvmet_ns_p2pmem_store(struct config_item *item, |
496 | const char *page, size_t count) |
497 | { |
498 | struct nvmet_ns *ns = to_nvmet_ns(item); |
499 | struct pci_dev *p2p_dev = NULL; |
500 | bool use_p2pmem; |
501 | int ret = count; |
502 | int error; |
503 | |
504 | mutex_lock(&ns->subsys->lock); |
505 | if (ns->enabled) { |
506 | ret = -EBUSY; |
507 | goto out_unlock; |
508 | } |
509 | |
510 | error = pci_p2pdma_enable_store(page, p2p_dev: &p2p_dev, use_p2pdma: &use_p2pmem); |
511 | if (error) { |
512 | ret = error; |
513 | goto out_unlock; |
514 | } |
515 | |
516 | ns->use_p2pmem = use_p2pmem; |
517 | pci_dev_put(dev: ns->p2p_dev); |
518 | ns->p2p_dev = p2p_dev; |
519 | |
520 | out_unlock: |
521 | mutex_unlock(lock: &ns->subsys->lock); |
522 | |
523 | return ret; |
524 | } |
525 | |
526 | CONFIGFS_ATTR(nvmet_ns_, p2pmem); |
527 | #endif /* CONFIG_PCI_P2PDMA */ |
528 | |
529 | static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page) |
530 | { |
531 | return sprintf(buf: page, fmt: "%pUb\n" , &to_nvmet_ns(item)->uuid); |
532 | } |
533 | |
534 | static ssize_t nvmet_ns_device_uuid_store(struct config_item *item, |
535 | const char *page, size_t count) |
536 | { |
537 | struct nvmet_ns *ns = to_nvmet_ns(item); |
538 | struct nvmet_subsys *subsys = ns->subsys; |
539 | int ret = 0; |
540 | |
541 | mutex_lock(&subsys->lock); |
542 | if (ns->enabled) { |
543 | ret = -EBUSY; |
544 | goto out_unlock; |
545 | } |
546 | |
547 | if (uuid_parse(uuid: page, u: &ns->uuid)) |
548 | ret = -EINVAL; |
549 | |
550 | out_unlock: |
551 | mutex_unlock(lock: &subsys->lock); |
552 | return ret ? ret : count; |
553 | } |
554 | |
555 | CONFIGFS_ATTR(nvmet_ns_, device_uuid); |
556 | |
557 | static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page) |
558 | { |
559 | return sprintf(buf: page, fmt: "%pUb\n" , &to_nvmet_ns(item)->nguid); |
560 | } |
561 | |
562 | static ssize_t nvmet_ns_device_nguid_store(struct config_item *item, |
563 | const char *page, size_t count) |
564 | { |
565 | struct nvmet_ns *ns = to_nvmet_ns(item); |
566 | struct nvmet_subsys *subsys = ns->subsys; |
567 | u8 nguid[16]; |
568 | const char *p = page; |
569 | int i; |
570 | int ret = 0; |
571 | |
572 | mutex_lock(&subsys->lock); |
573 | if (ns->enabled) { |
574 | ret = -EBUSY; |
575 | goto out_unlock; |
576 | } |
577 | |
578 | for (i = 0; i < 16; i++) { |
579 | if (p + 2 > page + count) { |
580 | ret = -EINVAL; |
581 | goto out_unlock; |
582 | } |
583 | if (!isxdigit(p[0]) || !isxdigit(p[1])) { |
584 | ret = -EINVAL; |
585 | goto out_unlock; |
586 | } |
587 | |
588 | nguid[i] = (hex_to_bin(ch: p[0]) << 4) | hex_to_bin(ch: p[1]); |
589 | p += 2; |
590 | |
591 | if (*p == '-' || *p == ':') |
592 | p++; |
593 | } |
594 | |
595 | memcpy(&ns->nguid, nguid, sizeof(nguid)); |
596 | out_unlock: |
597 | mutex_unlock(lock: &subsys->lock); |
598 | return ret ? ret : count; |
599 | } |
600 | |
601 | CONFIGFS_ATTR(nvmet_ns_, device_nguid); |
602 | |
603 | static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page) |
604 | { |
605 | return sprintf(buf: page, fmt: "%u\n" , to_nvmet_ns(item)->anagrpid); |
606 | } |
607 | |
608 | static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item, |
609 | const char *page, size_t count) |
610 | { |
611 | struct nvmet_ns *ns = to_nvmet_ns(item); |
612 | u32 oldgrpid, newgrpid; |
613 | int ret; |
614 | |
615 | ret = kstrtou32(s: page, base: 0, res: &newgrpid); |
616 | if (ret) |
617 | return ret; |
618 | |
619 | if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS) |
620 | return -EINVAL; |
621 | |
622 | down_write(sem: &nvmet_ana_sem); |
623 | oldgrpid = ns->anagrpid; |
624 | nvmet_ana_group_enabled[newgrpid]++; |
625 | ns->anagrpid = newgrpid; |
626 | nvmet_ana_group_enabled[oldgrpid]--; |
627 | nvmet_ana_chgcnt++; |
628 | up_write(sem: &nvmet_ana_sem); |
629 | |
630 | nvmet_send_ana_event(subsys: ns->subsys, NULL); |
631 | return count; |
632 | } |
633 | |
634 | CONFIGFS_ATTR(nvmet_ns_, ana_grpid); |
635 | |
636 | static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page) |
637 | { |
638 | return sprintf(buf: page, fmt: "%d\n" , to_nvmet_ns(item)->enabled); |
639 | } |
640 | |
641 | static ssize_t nvmet_ns_enable_store(struct config_item *item, |
642 | const char *page, size_t count) |
643 | { |
644 | struct nvmet_ns *ns = to_nvmet_ns(item); |
645 | bool enable; |
646 | int ret = 0; |
647 | |
648 | if (kstrtobool(s: page, res: &enable)) |
649 | return -EINVAL; |
650 | |
651 | if (enable) |
652 | ret = nvmet_ns_enable(ns); |
653 | else |
654 | nvmet_ns_disable(ns); |
655 | |
656 | return ret ? ret : count; |
657 | } |
658 | |
659 | CONFIGFS_ATTR(nvmet_ns_, enable); |
660 | |
661 | static ssize_t nvmet_ns_buffered_io_show(struct config_item *item, char *page) |
662 | { |
663 | return sprintf(buf: page, fmt: "%d\n" , to_nvmet_ns(item)->buffered_io); |
664 | } |
665 | |
666 | static ssize_t nvmet_ns_buffered_io_store(struct config_item *item, |
667 | const char *page, size_t count) |
668 | { |
669 | struct nvmet_ns *ns = to_nvmet_ns(item); |
670 | bool val; |
671 | |
672 | if (kstrtobool(s: page, res: &val)) |
673 | return -EINVAL; |
674 | |
675 | mutex_lock(&ns->subsys->lock); |
676 | if (ns->enabled) { |
677 | pr_err("disable ns before setting buffered_io value.\n" ); |
678 | mutex_unlock(lock: &ns->subsys->lock); |
679 | return -EINVAL; |
680 | } |
681 | |
682 | ns->buffered_io = val; |
683 | mutex_unlock(lock: &ns->subsys->lock); |
684 | return count; |
685 | } |
686 | |
687 | CONFIGFS_ATTR(nvmet_ns_, buffered_io); |
688 | |
689 | static ssize_t nvmet_ns_revalidate_size_store(struct config_item *item, |
690 | const char *page, size_t count) |
691 | { |
692 | struct nvmet_ns *ns = to_nvmet_ns(item); |
693 | bool val; |
694 | |
695 | if (kstrtobool(s: page, res: &val)) |
696 | return -EINVAL; |
697 | |
698 | if (!val) |
699 | return -EINVAL; |
700 | |
701 | mutex_lock(&ns->subsys->lock); |
702 | if (!ns->enabled) { |
703 | pr_err("enable ns before revalidate.\n" ); |
704 | mutex_unlock(lock: &ns->subsys->lock); |
705 | return -EINVAL; |
706 | } |
707 | if (nvmet_ns_revalidate(ns)) |
708 | nvmet_ns_changed(subsys: ns->subsys, nsid: ns->nsid); |
709 | mutex_unlock(lock: &ns->subsys->lock); |
710 | return count; |
711 | } |
712 | |
713 | CONFIGFS_ATTR_WO(nvmet_ns_, revalidate_size); |
714 | |
715 | static struct configfs_attribute *nvmet_ns_attrs[] = { |
716 | &nvmet_ns_attr_device_path, |
717 | &nvmet_ns_attr_device_nguid, |
718 | &nvmet_ns_attr_device_uuid, |
719 | &nvmet_ns_attr_ana_grpid, |
720 | &nvmet_ns_attr_enable, |
721 | &nvmet_ns_attr_buffered_io, |
722 | &nvmet_ns_attr_revalidate_size, |
723 | #ifdef CONFIG_PCI_P2PDMA |
724 | &nvmet_ns_attr_p2pmem, |
725 | #endif |
726 | NULL, |
727 | }; |
728 | |
729 | static void nvmet_ns_release(struct config_item *item) |
730 | { |
731 | struct nvmet_ns *ns = to_nvmet_ns(item); |
732 | |
733 | nvmet_ns_free(ns); |
734 | } |
735 | |
736 | static struct configfs_item_operations nvmet_ns_item_ops = { |
737 | .release = nvmet_ns_release, |
738 | }; |
739 | |
740 | static const struct config_item_type nvmet_ns_type = { |
741 | .ct_item_ops = &nvmet_ns_item_ops, |
742 | .ct_attrs = nvmet_ns_attrs, |
743 | .ct_owner = THIS_MODULE, |
744 | }; |
745 | |
746 | static struct config_group *nvmet_ns_make(struct config_group *group, |
747 | const char *name) |
748 | { |
749 | struct nvmet_subsys *subsys = namespaces_to_subsys(item: &group->cg_item); |
750 | struct nvmet_ns *ns; |
751 | int ret; |
752 | u32 nsid; |
753 | |
754 | ret = kstrtou32(s: name, base: 0, res: &nsid); |
755 | if (ret) |
756 | goto out; |
757 | |
758 | ret = -EINVAL; |
759 | if (nsid == 0 || nsid == NVME_NSID_ALL) { |
760 | pr_err("invalid nsid %#x" , nsid); |
761 | goto out; |
762 | } |
763 | |
764 | ret = -ENOMEM; |
765 | ns = nvmet_ns_alloc(subsys, nsid); |
766 | if (!ns) |
767 | goto out; |
768 | config_group_init_type_name(group: &ns->group, name, type: &nvmet_ns_type); |
769 | |
770 | pr_info("adding nsid %d to subsystem %s\n" , nsid, subsys->subsysnqn); |
771 | |
772 | return &ns->group; |
773 | out: |
774 | return ERR_PTR(error: ret); |
775 | } |
776 | |
777 | static struct configfs_group_operations nvmet_namespaces_group_ops = { |
778 | .make_group = nvmet_ns_make, |
779 | }; |
780 | |
781 | static const struct config_item_type nvmet_namespaces_type = { |
782 | .ct_group_ops = &nvmet_namespaces_group_ops, |
783 | .ct_owner = THIS_MODULE, |
784 | }; |
785 | |
786 | #ifdef CONFIG_NVME_TARGET_PASSTHRU |
787 | |
788 | static ssize_t nvmet_passthru_device_path_show(struct config_item *item, |
789 | char *page) |
790 | { |
791 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
792 | |
793 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , subsys->passthru_ctrl_path); |
794 | } |
795 | |
796 | static ssize_t nvmet_passthru_device_path_store(struct config_item *item, |
797 | const char *page, size_t count) |
798 | { |
799 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
800 | size_t len; |
801 | int ret; |
802 | |
803 | mutex_lock(&subsys->lock); |
804 | |
805 | ret = -EBUSY; |
806 | if (subsys->passthru_ctrl) |
807 | goto out_unlock; |
808 | |
809 | ret = -EINVAL; |
810 | len = strcspn(page, "\n" ); |
811 | if (!len) |
812 | goto out_unlock; |
813 | |
814 | kfree(objp: subsys->passthru_ctrl_path); |
815 | ret = -ENOMEM; |
816 | subsys->passthru_ctrl_path = kstrndup(s: page, len, GFP_KERNEL); |
817 | if (!subsys->passthru_ctrl_path) |
818 | goto out_unlock; |
819 | |
820 | mutex_unlock(lock: &subsys->lock); |
821 | |
822 | return count; |
823 | out_unlock: |
824 | mutex_unlock(lock: &subsys->lock); |
825 | return ret; |
826 | } |
827 | CONFIGFS_ATTR(nvmet_passthru_, device_path); |
828 | |
829 | static ssize_t nvmet_passthru_enable_show(struct config_item *item, |
830 | char *page) |
831 | { |
832 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
833 | |
834 | return sprintf(buf: page, fmt: "%d\n" , subsys->passthru_ctrl ? 1 : 0); |
835 | } |
836 | |
837 | static ssize_t nvmet_passthru_enable_store(struct config_item *item, |
838 | const char *page, size_t count) |
839 | { |
840 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
841 | bool enable; |
842 | int ret = 0; |
843 | |
844 | if (kstrtobool(s: page, res: &enable)) |
845 | return -EINVAL; |
846 | |
847 | if (enable) |
848 | ret = nvmet_passthru_ctrl_enable(subsys); |
849 | else |
850 | nvmet_passthru_ctrl_disable(subsys); |
851 | |
852 | return ret ? ret : count; |
853 | } |
854 | CONFIGFS_ATTR(nvmet_passthru_, enable); |
855 | |
856 | static ssize_t nvmet_passthru_admin_timeout_show(struct config_item *item, |
857 | char *page) |
858 | { |
859 | return sprintf(buf: page, fmt: "%u\n" , to_subsys(item: item->ci_parent)->admin_timeout); |
860 | } |
861 | |
862 | static ssize_t nvmet_passthru_admin_timeout_store(struct config_item *item, |
863 | const char *page, size_t count) |
864 | { |
865 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
866 | unsigned int timeout; |
867 | |
868 | if (kstrtouint(s: page, base: 0, res: &timeout)) |
869 | return -EINVAL; |
870 | subsys->admin_timeout = timeout; |
871 | return count; |
872 | } |
873 | CONFIGFS_ATTR(nvmet_passthru_, admin_timeout); |
874 | |
875 | static ssize_t nvmet_passthru_io_timeout_show(struct config_item *item, |
876 | char *page) |
877 | { |
878 | return sprintf(buf: page, fmt: "%u\n" , to_subsys(item: item->ci_parent)->io_timeout); |
879 | } |
880 | |
881 | static ssize_t nvmet_passthru_io_timeout_store(struct config_item *item, |
882 | const char *page, size_t count) |
883 | { |
884 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
885 | unsigned int timeout; |
886 | |
887 | if (kstrtouint(s: page, base: 0, res: &timeout)) |
888 | return -EINVAL; |
889 | subsys->io_timeout = timeout; |
890 | return count; |
891 | } |
892 | CONFIGFS_ATTR(nvmet_passthru_, io_timeout); |
893 | |
894 | static ssize_t nvmet_passthru_clear_ids_show(struct config_item *item, |
895 | char *page) |
896 | { |
897 | return sprintf(buf: page, fmt: "%u\n" , to_subsys(item: item->ci_parent)->clear_ids); |
898 | } |
899 | |
900 | static ssize_t nvmet_passthru_clear_ids_store(struct config_item *item, |
901 | const char *page, size_t count) |
902 | { |
903 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
904 | unsigned int clear_ids; |
905 | |
906 | if (kstrtouint(s: page, base: 0, res: &clear_ids)) |
907 | return -EINVAL; |
908 | subsys->clear_ids = clear_ids; |
909 | return count; |
910 | } |
911 | CONFIGFS_ATTR(nvmet_passthru_, clear_ids); |
912 | |
913 | static struct configfs_attribute *nvmet_passthru_attrs[] = { |
914 | &nvmet_passthru_attr_device_path, |
915 | &nvmet_passthru_attr_enable, |
916 | &nvmet_passthru_attr_admin_timeout, |
917 | &nvmet_passthru_attr_io_timeout, |
918 | &nvmet_passthru_attr_clear_ids, |
919 | NULL, |
920 | }; |
921 | |
922 | static const struct config_item_type nvmet_passthru_type = { |
923 | .ct_attrs = nvmet_passthru_attrs, |
924 | .ct_owner = THIS_MODULE, |
925 | }; |
926 | |
927 | static void nvmet_add_passthru_group(struct nvmet_subsys *subsys) |
928 | { |
929 | config_group_init_type_name(group: &subsys->passthru_group, |
930 | name: "passthru" , type: &nvmet_passthru_type); |
931 | configfs_add_default_group(new_group: &subsys->passthru_group, |
932 | group: &subsys->group); |
933 | } |
934 | |
935 | #else /* CONFIG_NVME_TARGET_PASSTHRU */ |
936 | |
937 | static void nvmet_add_passthru_group(struct nvmet_subsys *subsys) |
938 | { |
939 | } |
940 | |
941 | #endif /* CONFIG_NVME_TARGET_PASSTHRU */ |
942 | |
943 | static int nvmet_port_subsys_allow_link(struct config_item *parent, |
944 | struct config_item *target) |
945 | { |
946 | struct nvmet_port *port = to_nvmet_port(item: parent->ci_parent); |
947 | struct nvmet_subsys *subsys; |
948 | struct nvmet_subsys_link *link, *p; |
949 | int ret; |
950 | |
951 | if (target->ci_type != &nvmet_subsys_type) { |
952 | pr_err("can only link subsystems into the subsystems dir.!\n" ); |
953 | return -EINVAL; |
954 | } |
955 | subsys = to_subsys(item: target); |
956 | link = kmalloc(size: sizeof(*link), GFP_KERNEL); |
957 | if (!link) |
958 | return -ENOMEM; |
959 | link->subsys = subsys; |
960 | |
961 | down_write(sem: &nvmet_config_sem); |
962 | ret = -EEXIST; |
963 | list_for_each_entry(p, &port->subsystems, entry) { |
964 | if (p->subsys == subsys) |
965 | goto out_free_link; |
966 | } |
967 | |
968 | if (list_empty(head: &port->subsystems)) { |
969 | ret = nvmet_enable_port(port); |
970 | if (ret) |
971 | goto out_free_link; |
972 | } |
973 | |
974 | list_add_tail(new: &link->entry, head: &port->subsystems); |
975 | nvmet_port_disc_changed(port, subsys); |
976 | |
977 | up_write(sem: &nvmet_config_sem); |
978 | return 0; |
979 | |
980 | out_free_link: |
981 | up_write(sem: &nvmet_config_sem); |
982 | kfree(objp: link); |
983 | return ret; |
984 | } |
985 | |
986 | static void nvmet_port_subsys_drop_link(struct config_item *parent, |
987 | struct config_item *target) |
988 | { |
989 | struct nvmet_port *port = to_nvmet_port(item: parent->ci_parent); |
990 | struct nvmet_subsys *subsys = to_subsys(item: target); |
991 | struct nvmet_subsys_link *p; |
992 | |
993 | down_write(sem: &nvmet_config_sem); |
994 | list_for_each_entry(p, &port->subsystems, entry) { |
995 | if (p->subsys == subsys) |
996 | goto found; |
997 | } |
998 | up_write(sem: &nvmet_config_sem); |
999 | return; |
1000 | |
1001 | found: |
1002 | list_del(entry: &p->entry); |
1003 | nvmet_port_del_ctrls(port, subsys); |
1004 | nvmet_port_disc_changed(port, subsys); |
1005 | |
1006 | if (list_empty(head: &port->subsystems)) |
1007 | nvmet_disable_port(port); |
1008 | up_write(sem: &nvmet_config_sem); |
1009 | kfree(objp: p); |
1010 | } |
1011 | |
1012 | static struct configfs_item_operations nvmet_port_subsys_item_ops = { |
1013 | .allow_link = nvmet_port_subsys_allow_link, |
1014 | .drop_link = nvmet_port_subsys_drop_link, |
1015 | }; |
1016 | |
1017 | static const struct config_item_type nvmet_port_subsys_type = { |
1018 | .ct_item_ops = &nvmet_port_subsys_item_ops, |
1019 | .ct_owner = THIS_MODULE, |
1020 | }; |
1021 | |
1022 | static int nvmet_allowed_hosts_allow_link(struct config_item *parent, |
1023 | struct config_item *target) |
1024 | { |
1025 | struct nvmet_subsys *subsys = to_subsys(item: parent->ci_parent); |
1026 | struct nvmet_host *host; |
1027 | struct nvmet_host_link *link, *p; |
1028 | int ret; |
1029 | |
1030 | if (target->ci_type != &nvmet_host_type) { |
1031 | pr_err("can only link hosts into the allowed_hosts directory!\n" ); |
1032 | return -EINVAL; |
1033 | } |
1034 | |
1035 | host = to_host(item: target); |
1036 | link = kmalloc(size: sizeof(*link), GFP_KERNEL); |
1037 | if (!link) |
1038 | return -ENOMEM; |
1039 | link->host = host; |
1040 | |
1041 | down_write(sem: &nvmet_config_sem); |
1042 | ret = -EINVAL; |
1043 | if (subsys->allow_any_host) { |
1044 | pr_err("can't add hosts when allow_any_host is set!\n" ); |
1045 | goto out_free_link; |
1046 | } |
1047 | |
1048 | ret = -EEXIST; |
1049 | list_for_each_entry(p, &subsys->hosts, entry) { |
1050 | if (!strcmp(nvmet_host_name(host: p->host), nvmet_host_name(host))) |
1051 | goto out_free_link; |
1052 | } |
1053 | list_add_tail(new: &link->entry, head: &subsys->hosts); |
1054 | nvmet_subsys_disc_changed(subsys, host); |
1055 | |
1056 | up_write(sem: &nvmet_config_sem); |
1057 | return 0; |
1058 | out_free_link: |
1059 | up_write(sem: &nvmet_config_sem); |
1060 | kfree(objp: link); |
1061 | return ret; |
1062 | } |
1063 | |
1064 | static void nvmet_allowed_hosts_drop_link(struct config_item *parent, |
1065 | struct config_item *target) |
1066 | { |
1067 | struct nvmet_subsys *subsys = to_subsys(item: parent->ci_parent); |
1068 | struct nvmet_host *host = to_host(item: target); |
1069 | struct nvmet_host_link *p; |
1070 | |
1071 | down_write(sem: &nvmet_config_sem); |
1072 | list_for_each_entry(p, &subsys->hosts, entry) { |
1073 | if (!strcmp(nvmet_host_name(host: p->host), nvmet_host_name(host))) |
1074 | goto found; |
1075 | } |
1076 | up_write(sem: &nvmet_config_sem); |
1077 | return; |
1078 | |
1079 | found: |
1080 | list_del(entry: &p->entry); |
1081 | nvmet_subsys_disc_changed(subsys, host); |
1082 | |
1083 | up_write(sem: &nvmet_config_sem); |
1084 | kfree(objp: p); |
1085 | } |
1086 | |
1087 | static struct configfs_item_operations nvmet_allowed_hosts_item_ops = { |
1088 | .allow_link = nvmet_allowed_hosts_allow_link, |
1089 | .drop_link = nvmet_allowed_hosts_drop_link, |
1090 | }; |
1091 | |
1092 | static const struct config_item_type nvmet_allowed_hosts_type = { |
1093 | .ct_item_ops = &nvmet_allowed_hosts_item_ops, |
1094 | .ct_owner = THIS_MODULE, |
1095 | }; |
1096 | |
1097 | static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item, |
1098 | char *page) |
1099 | { |
1100 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , |
1101 | to_subsys(item)->allow_any_host); |
1102 | } |
1103 | |
1104 | static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, |
1105 | const char *page, size_t count) |
1106 | { |
1107 | struct nvmet_subsys *subsys = to_subsys(item); |
1108 | bool allow_any_host; |
1109 | int ret = 0; |
1110 | |
1111 | if (kstrtobool(s: page, res: &allow_any_host)) |
1112 | return -EINVAL; |
1113 | |
1114 | down_write(sem: &nvmet_config_sem); |
1115 | if (allow_any_host && !list_empty(head: &subsys->hosts)) { |
1116 | pr_err("Can't set allow_any_host when explicit hosts are set!\n" ); |
1117 | ret = -EINVAL; |
1118 | goto out_unlock; |
1119 | } |
1120 | |
1121 | if (subsys->allow_any_host != allow_any_host) { |
1122 | subsys->allow_any_host = allow_any_host; |
1123 | nvmet_subsys_disc_changed(subsys, NULL); |
1124 | } |
1125 | |
1126 | out_unlock: |
1127 | up_write(sem: &nvmet_config_sem); |
1128 | return ret ? ret : count; |
1129 | } |
1130 | |
1131 | CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); |
1132 | |
1133 | static ssize_t nvmet_subsys_attr_version_show(struct config_item *item, |
1134 | char *page) |
1135 | { |
1136 | struct nvmet_subsys *subsys = to_subsys(item); |
1137 | |
1138 | if (NVME_TERTIARY(subsys->ver)) |
1139 | return snprintf(buf: page, PAGE_SIZE, fmt: "%llu.%llu.%llu\n" , |
1140 | NVME_MAJOR(subsys->ver), |
1141 | NVME_MINOR(subsys->ver), |
1142 | NVME_TERTIARY(subsys->ver)); |
1143 | |
1144 | return snprintf(buf: page, PAGE_SIZE, fmt: "%llu.%llu\n" , |
1145 | NVME_MAJOR(subsys->ver), |
1146 | NVME_MINOR(subsys->ver)); |
1147 | } |
1148 | |
1149 | static ssize_t |
1150 | nvmet_subsys_attr_version_store_locked(struct nvmet_subsys *subsys, |
1151 | const char *page, size_t count) |
1152 | { |
1153 | int major, minor, tertiary = 0; |
1154 | int ret; |
1155 | |
1156 | if (subsys->subsys_discovered) { |
1157 | if (NVME_TERTIARY(subsys->ver)) |
1158 | pr_err("Can't set version number. %llu.%llu.%llu is already assigned\n" , |
1159 | NVME_MAJOR(subsys->ver), |
1160 | NVME_MINOR(subsys->ver), |
1161 | NVME_TERTIARY(subsys->ver)); |
1162 | else |
1163 | pr_err("Can't set version number. %llu.%llu is already assigned\n" , |
1164 | NVME_MAJOR(subsys->ver), |
1165 | NVME_MINOR(subsys->ver)); |
1166 | return -EINVAL; |
1167 | } |
1168 | |
1169 | /* passthru subsystems use the underlying controller's version */ |
1170 | if (nvmet_is_passthru_subsys(subsys)) |
1171 | return -EINVAL; |
1172 | |
1173 | ret = sscanf(page, "%d.%d.%d\n" , &major, &minor, &tertiary); |
1174 | if (ret != 2 && ret != 3) |
1175 | return -EINVAL; |
1176 | |
1177 | subsys->ver = NVME_VS(major, minor, tertiary); |
1178 | |
1179 | return count; |
1180 | } |
1181 | |
1182 | static ssize_t nvmet_subsys_attr_version_store(struct config_item *item, |
1183 | const char *page, size_t count) |
1184 | { |
1185 | struct nvmet_subsys *subsys = to_subsys(item); |
1186 | ssize_t ret; |
1187 | |
1188 | down_write(sem: &nvmet_config_sem); |
1189 | mutex_lock(&subsys->lock); |
1190 | ret = nvmet_subsys_attr_version_store_locked(subsys, page, count); |
1191 | mutex_unlock(lock: &subsys->lock); |
1192 | up_write(sem: &nvmet_config_sem); |
1193 | |
1194 | return ret; |
1195 | } |
1196 | CONFIGFS_ATTR(nvmet_subsys_, attr_version); |
1197 | |
1198 | /* See Section 1.5 of NVMe 1.4 */ |
1199 | static bool nvmet_is_ascii(const char c) |
1200 | { |
1201 | return c >= 0x20 && c <= 0x7e; |
1202 | } |
1203 | |
1204 | static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item, |
1205 | char *page) |
1206 | { |
1207 | struct nvmet_subsys *subsys = to_subsys(item); |
1208 | |
1209 | return snprintf(buf: page, PAGE_SIZE, fmt: "%.*s\n" , |
1210 | NVMET_SN_MAX_SIZE, subsys->serial); |
1211 | } |
1212 | |
1213 | static ssize_t |
1214 | nvmet_subsys_attr_serial_store_locked(struct nvmet_subsys *subsys, |
1215 | const char *page, size_t count) |
1216 | { |
1217 | int pos, len = strcspn(page, "\n" ); |
1218 | |
1219 | if (subsys->subsys_discovered) { |
1220 | pr_err("Can't set serial number. %s is already assigned\n" , |
1221 | subsys->serial); |
1222 | return -EINVAL; |
1223 | } |
1224 | |
1225 | if (!len || len > NVMET_SN_MAX_SIZE) { |
1226 | pr_err("Serial Number can not be empty or exceed %d Bytes\n" , |
1227 | NVMET_SN_MAX_SIZE); |
1228 | return -EINVAL; |
1229 | } |
1230 | |
1231 | for (pos = 0; pos < len; pos++) { |
1232 | if (!nvmet_is_ascii(c: page[pos])) { |
1233 | pr_err("Serial Number must contain only ASCII strings\n" ); |
1234 | return -EINVAL; |
1235 | } |
1236 | } |
1237 | |
1238 | memcpy_and_pad(dest: subsys->serial, NVMET_SN_MAX_SIZE, src: page, count: len, pad: ' '); |
1239 | |
1240 | return count; |
1241 | } |
1242 | |
1243 | static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item, |
1244 | const char *page, size_t count) |
1245 | { |
1246 | struct nvmet_subsys *subsys = to_subsys(item); |
1247 | ssize_t ret; |
1248 | |
1249 | down_write(sem: &nvmet_config_sem); |
1250 | mutex_lock(&subsys->lock); |
1251 | ret = nvmet_subsys_attr_serial_store_locked(subsys, page, count); |
1252 | mutex_unlock(lock: &subsys->lock); |
1253 | up_write(sem: &nvmet_config_sem); |
1254 | |
1255 | return ret; |
1256 | } |
1257 | CONFIGFS_ATTR(nvmet_subsys_, attr_serial); |
1258 | |
1259 | static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item, |
1260 | char *page) |
1261 | { |
1262 | return snprintf(buf: page, PAGE_SIZE, fmt: "%u\n" , to_subsys(item)->cntlid_min); |
1263 | } |
1264 | |
1265 | static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item, |
1266 | const char *page, size_t cnt) |
1267 | { |
1268 | u16 cntlid_min; |
1269 | |
1270 | if (sscanf(page, "%hu\n" , &cntlid_min) != 1) |
1271 | return -EINVAL; |
1272 | |
1273 | if (cntlid_min == 0) |
1274 | return -EINVAL; |
1275 | |
1276 | down_write(sem: &nvmet_config_sem); |
1277 | if (cntlid_min >= to_subsys(item)->cntlid_max) |
1278 | goto out_unlock; |
1279 | to_subsys(item)->cntlid_min = cntlid_min; |
1280 | up_write(sem: &nvmet_config_sem); |
1281 | return cnt; |
1282 | |
1283 | out_unlock: |
1284 | up_write(sem: &nvmet_config_sem); |
1285 | return -EINVAL; |
1286 | } |
1287 | CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min); |
1288 | |
1289 | static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item, |
1290 | char *page) |
1291 | { |
1292 | return snprintf(buf: page, PAGE_SIZE, fmt: "%u\n" , to_subsys(item)->cntlid_max); |
1293 | } |
1294 | |
1295 | static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item, |
1296 | const char *page, size_t cnt) |
1297 | { |
1298 | u16 cntlid_max; |
1299 | |
1300 | if (sscanf(page, "%hu\n" , &cntlid_max) != 1) |
1301 | return -EINVAL; |
1302 | |
1303 | if (cntlid_max == 0) |
1304 | return -EINVAL; |
1305 | |
1306 | down_write(sem: &nvmet_config_sem); |
1307 | if (cntlid_max <= to_subsys(item)->cntlid_min) |
1308 | goto out_unlock; |
1309 | to_subsys(item)->cntlid_max = cntlid_max; |
1310 | up_write(sem: &nvmet_config_sem); |
1311 | return cnt; |
1312 | |
1313 | out_unlock: |
1314 | up_write(sem: &nvmet_config_sem); |
1315 | return -EINVAL; |
1316 | } |
1317 | CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max); |
1318 | |
1319 | static ssize_t nvmet_subsys_attr_model_show(struct config_item *item, |
1320 | char *page) |
1321 | { |
1322 | struct nvmet_subsys *subsys = to_subsys(item); |
1323 | |
1324 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , subsys->model_number); |
1325 | } |
1326 | |
1327 | static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys, |
1328 | const char *page, size_t count) |
1329 | { |
1330 | int pos = 0, len; |
1331 | char *val; |
1332 | |
1333 | if (subsys->subsys_discovered) { |
1334 | pr_err("Can't set model number. %s is already assigned\n" , |
1335 | subsys->model_number); |
1336 | return -EINVAL; |
1337 | } |
1338 | |
1339 | len = strcspn(page, "\n" ); |
1340 | if (!len) |
1341 | return -EINVAL; |
1342 | |
1343 | if (len > NVMET_MN_MAX_SIZE) { |
1344 | pr_err("Model number size can not exceed %d Bytes\n" , |
1345 | NVMET_MN_MAX_SIZE); |
1346 | return -EINVAL; |
1347 | } |
1348 | |
1349 | for (pos = 0; pos < len; pos++) { |
1350 | if (!nvmet_is_ascii(c: page[pos])) |
1351 | return -EINVAL; |
1352 | } |
1353 | |
1354 | val = kmemdup_nul(s: page, len, GFP_KERNEL); |
1355 | if (!val) |
1356 | return -ENOMEM; |
1357 | kfree(objp: subsys->model_number); |
1358 | subsys->model_number = val; |
1359 | return count; |
1360 | } |
1361 | |
1362 | static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, |
1363 | const char *page, size_t count) |
1364 | { |
1365 | struct nvmet_subsys *subsys = to_subsys(item); |
1366 | ssize_t ret; |
1367 | |
1368 | down_write(sem: &nvmet_config_sem); |
1369 | mutex_lock(&subsys->lock); |
1370 | ret = nvmet_subsys_attr_model_store_locked(subsys, page, count); |
1371 | mutex_unlock(lock: &subsys->lock); |
1372 | up_write(sem: &nvmet_config_sem); |
1373 | |
1374 | return ret; |
1375 | } |
1376 | CONFIGFS_ATTR(nvmet_subsys_, attr_model); |
1377 | |
1378 | static ssize_t nvmet_subsys_attr_ieee_oui_show(struct config_item *item, |
1379 | char *page) |
1380 | { |
1381 | struct nvmet_subsys *subsys = to_subsys(item); |
1382 | |
1383 | return sysfs_emit(buf: page, fmt: "0x%06x\n" , subsys->ieee_oui); |
1384 | } |
1385 | |
1386 | static ssize_t nvmet_subsys_attr_ieee_oui_store_locked(struct nvmet_subsys *subsys, |
1387 | const char *page, size_t count) |
1388 | { |
1389 | uint32_t val = 0; |
1390 | int ret; |
1391 | |
1392 | if (subsys->subsys_discovered) { |
1393 | pr_err("Can't set IEEE OUI. 0x%06x is already assigned\n" , |
1394 | subsys->ieee_oui); |
1395 | return -EINVAL; |
1396 | } |
1397 | |
1398 | ret = kstrtou32(s: page, base: 0, res: &val); |
1399 | if (ret < 0) |
1400 | return ret; |
1401 | |
1402 | if (val >= 0x1000000) |
1403 | return -EINVAL; |
1404 | |
1405 | subsys->ieee_oui = val; |
1406 | |
1407 | return count; |
1408 | } |
1409 | |
1410 | static ssize_t nvmet_subsys_attr_ieee_oui_store(struct config_item *item, |
1411 | const char *page, size_t count) |
1412 | { |
1413 | struct nvmet_subsys *subsys = to_subsys(item); |
1414 | ssize_t ret; |
1415 | |
1416 | down_write(sem: &nvmet_config_sem); |
1417 | mutex_lock(&subsys->lock); |
1418 | ret = nvmet_subsys_attr_ieee_oui_store_locked(subsys, page, count); |
1419 | mutex_unlock(lock: &subsys->lock); |
1420 | up_write(sem: &nvmet_config_sem); |
1421 | |
1422 | return ret; |
1423 | } |
1424 | CONFIGFS_ATTR(nvmet_subsys_, attr_ieee_oui); |
1425 | |
1426 | static ssize_t nvmet_subsys_attr_firmware_show(struct config_item *item, |
1427 | char *page) |
1428 | { |
1429 | struct nvmet_subsys *subsys = to_subsys(item); |
1430 | |
1431 | return sysfs_emit(buf: page, fmt: "%s\n" , subsys->firmware_rev); |
1432 | } |
1433 | |
1434 | static ssize_t nvmet_subsys_attr_firmware_store_locked(struct nvmet_subsys *subsys, |
1435 | const char *page, size_t count) |
1436 | { |
1437 | int pos = 0, len; |
1438 | char *val; |
1439 | |
1440 | if (subsys->subsys_discovered) { |
1441 | pr_err("Can't set firmware revision. %s is already assigned\n" , |
1442 | subsys->firmware_rev); |
1443 | return -EINVAL; |
1444 | } |
1445 | |
1446 | len = strcspn(page, "\n" ); |
1447 | if (!len) |
1448 | return -EINVAL; |
1449 | |
1450 | if (len > NVMET_FR_MAX_SIZE) { |
1451 | pr_err("Firmware revision size can not exceed %d Bytes\n" , |
1452 | NVMET_FR_MAX_SIZE); |
1453 | return -EINVAL; |
1454 | } |
1455 | |
1456 | for (pos = 0; pos < len; pos++) { |
1457 | if (!nvmet_is_ascii(c: page[pos])) |
1458 | return -EINVAL; |
1459 | } |
1460 | |
1461 | val = kmemdup_nul(s: page, len, GFP_KERNEL); |
1462 | if (!val) |
1463 | return -ENOMEM; |
1464 | |
1465 | kfree(objp: subsys->firmware_rev); |
1466 | |
1467 | subsys->firmware_rev = val; |
1468 | |
1469 | return count; |
1470 | } |
1471 | |
1472 | static ssize_t nvmet_subsys_attr_firmware_store(struct config_item *item, |
1473 | const char *page, size_t count) |
1474 | { |
1475 | struct nvmet_subsys *subsys = to_subsys(item); |
1476 | ssize_t ret; |
1477 | |
1478 | down_write(sem: &nvmet_config_sem); |
1479 | mutex_lock(&subsys->lock); |
1480 | ret = nvmet_subsys_attr_firmware_store_locked(subsys, page, count); |
1481 | mutex_unlock(lock: &subsys->lock); |
1482 | up_write(sem: &nvmet_config_sem); |
1483 | |
1484 | return ret; |
1485 | } |
1486 | CONFIGFS_ATTR(nvmet_subsys_, attr_firmware); |
1487 | |
1488 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
1489 | static ssize_t nvmet_subsys_attr_pi_enable_show(struct config_item *item, |
1490 | char *page) |
1491 | { |
1492 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , to_subsys(item)->pi_support); |
1493 | } |
1494 | |
1495 | static ssize_t nvmet_subsys_attr_pi_enable_store(struct config_item *item, |
1496 | const char *page, size_t count) |
1497 | { |
1498 | struct nvmet_subsys *subsys = to_subsys(item); |
1499 | bool pi_enable; |
1500 | |
1501 | if (kstrtobool(s: page, res: &pi_enable)) |
1502 | return -EINVAL; |
1503 | |
1504 | subsys->pi_support = pi_enable; |
1505 | return count; |
1506 | } |
1507 | CONFIGFS_ATTR(nvmet_subsys_, attr_pi_enable); |
1508 | #endif |
1509 | |
1510 | static ssize_t nvmet_subsys_attr_qid_max_show(struct config_item *item, |
1511 | char *page) |
1512 | { |
1513 | return snprintf(buf: page, PAGE_SIZE, fmt: "%u\n" , to_subsys(item)->max_qid); |
1514 | } |
1515 | |
1516 | static ssize_t nvmet_subsys_attr_qid_max_store(struct config_item *item, |
1517 | const char *page, size_t cnt) |
1518 | { |
1519 | struct nvmet_subsys *subsys = to_subsys(item); |
1520 | struct nvmet_ctrl *ctrl; |
1521 | u16 qid_max; |
1522 | |
1523 | if (sscanf(page, "%hu\n" , &qid_max) != 1) |
1524 | return -EINVAL; |
1525 | |
1526 | if (qid_max < 1 || qid_max > NVMET_NR_QUEUES) |
1527 | return -EINVAL; |
1528 | |
1529 | down_write(sem: &nvmet_config_sem); |
1530 | subsys->max_qid = qid_max; |
1531 | |
1532 | /* Force reconnect */ |
1533 | list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) |
1534 | ctrl->ops->delete_ctrl(ctrl); |
1535 | up_write(sem: &nvmet_config_sem); |
1536 | |
1537 | return cnt; |
1538 | } |
1539 | CONFIGFS_ATTR(nvmet_subsys_, attr_qid_max); |
1540 | |
1541 | static struct configfs_attribute *nvmet_subsys_attrs[] = { |
1542 | &nvmet_subsys_attr_attr_allow_any_host, |
1543 | &nvmet_subsys_attr_attr_version, |
1544 | &nvmet_subsys_attr_attr_serial, |
1545 | &nvmet_subsys_attr_attr_cntlid_min, |
1546 | &nvmet_subsys_attr_attr_cntlid_max, |
1547 | &nvmet_subsys_attr_attr_model, |
1548 | &nvmet_subsys_attr_attr_qid_max, |
1549 | &nvmet_subsys_attr_attr_ieee_oui, |
1550 | &nvmet_subsys_attr_attr_firmware, |
1551 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
1552 | &nvmet_subsys_attr_attr_pi_enable, |
1553 | #endif |
1554 | NULL, |
1555 | }; |
1556 | |
1557 | /* |
1558 | * Subsystem structures & folder operation functions below |
1559 | */ |
1560 | static void nvmet_subsys_release(struct config_item *item) |
1561 | { |
1562 | struct nvmet_subsys *subsys = to_subsys(item); |
1563 | |
1564 | nvmet_subsys_del_ctrls(subsys); |
1565 | nvmet_subsys_put(subsys); |
1566 | } |
1567 | |
1568 | static struct configfs_item_operations nvmet_subsys_item_ops = { |
1569 | .release = nvmet_subsys_release, |
1570 | }; |
1571 | |
1572 | static const struct config_item_type nvmet_subsys_type = { |
1573 | .ct_item_ops = &nvmet_subsys_item_ops, |
1574 | .ct_attrs = nvmet_subsys_attrs, |
1575 | .ct_owner = THIS_MODULE, |
1576 | }; |
1577 | |
1578 | static struct config_group *nvmet_subsys_make(struct config_group *group, |
1579 | const char *name) |
1580 | { |
1581 | struct nvmet_subsys *subsys; |
1582 | |
1583 | if (sysfs_streq(s1: name, NVME_DISC_SUBSYS_NAME)) { |
1584 | pr_err("can't create discovery subsystem through configfs\n" ); |
1585 | return ERR_PTR(error: -EINVAL); |
1586 | } |
1587 | |
1588 | subsys = nvmet_subsys_alloc(subsysnqn: name, type: NVME_NQN_NVME); |
1589 | if (IS_ERR(ptr: subsys)) |
1590 | return ERR_CAST(ptr: subsys); |
1591 | |
1592 | config_group_init_type_name(group: &subsys->group, name, type: &nvmet_subsys_type); |
1593 | |
1594 | config_group_init_type_name(group: &subsys->namespaces_group, |
1595 | name: "namespaces" , type: &nvmet_namespaces_type); |
1596 | configfs_add_default_group(new_group: &subsys->namespaces_group, group: &subsys->group); |
1597 | |
1598 | config_group_init_type_name(group: &subsys->allowed_hosts_group, |
1599 | name: "allowed_hosts" , type: &nvmet_allowed_hosts_type); |
1600 | configfs_add_default_group(new_group: &subsys->allowed_hosts_group, |
1601 | group: &subsys->group); |
1602 | |
1603 | nvmet_add_passthru_group(subsys); |
1604 | |
1605 | return &subsys->group; |
1606 | } |
1607 | |
1608 | static struct configfs_group_operations nvmet_subsystems_group_ops = { |
1609 | .make_group = nvmet_subsys_make, |
1610 | }; |
1611 | |
1612 | static const struct config_item_type nvmet_subsystems_type = { |
1613 | .ct_group_ops = &nvmet_subsystems_group_ops, |
1614 | .ct_owner = THIS_MODULE, |
1615 | }; |
1616 | |
1617 | static ssize_t nvmet_referral_enable_show(struct config_item *item, |
1618 | char *page) |
1619 | { |
1620 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , to_nvmet_port(item)->enabled); |
1621 | } |
1622 | |
1623 | static ssize_t nvmet_referral_enable_store(struct config_item *item, |
1624 | const char *page, size_t count) |
1625 | { |
1626 | struct nvmet_port *parent = to_nvmet_port(item: item->ci_parent->ci_parent); |
1627 | struct nvmet_port *port = to_nvmet_port(item); |
1628 | bool enable; |
1629 | |
1630 | if (kstrtobool(s: page, res: &enable)) |
1631 | goto inval; |
1632 | |
1633 | if (enable) |
1634 | nvmet_referral_enable(parent, port); |
1635 | else |
1636 | nvmet_referral_disable(parent, port); |
1637 | |
1638 | return count; |
1639 | inval: |
1640 | pr_err("Invalid value '%s' for enable\n" , page); |
1641 | return -EINVAL; |
1642 | } |
1643 | |
1644 | CONFIGFS_ATTR(nvmet_referral_, enable); |
1645 | |
1646 | /* |
1647 | * Discovery Service subsystem definitions |
1648 | */ |
1649 | static struct configfs_attribute *nvmet_referral_attrs[] = { |
1650 | &nvmet_attr_addr_adrfam, |
1651 | &nvmet_attr_addr_portid, |
1652 | &nvmet_attr_addr_treq, |
1653 | &nvmet_attr_addr_traddr, |
1654 | &nvmet_attr_addr_trsvcid, |
1655 | &nvmet_attr_addr_trtype, |
1656 | &nvmet_referral_attr_enable, |
1657 | NULL, |
1658 | }; |
1659 | |
1660 | static void nvmet_referral_notify(struct config_group *group, |
1661 | struct config_item *item) |
1662 | { |
1663 | struct nvmet_port *parent = to_nvmet_port(item: item->ci_parent->ci_parent); |
1664 | struct nvmet_port *port = to_nvmet_port(item); |
1665 | |
1666 | nvmet_referral_disable(parent, port); |
1667 | } |
1668 | |
1669 | static void nvmet_referral_release(struct config_item *item) |
1670 | { |
1671 | struct nvmet_port *port = to_nvmet_port(item); |
1672 | |
1673 | kfree(objp: port); |
1674 | } |
1675 | |
1676 | static struct configfs_item_operations nvmet_referral_item_ops = { |
1677 | .release = nvmet_referral_release, |
1678 | }; |
1679 | |
1680 | static const struct config_item_type nvmet_referral_type = { |
1681 | .ct_owner = THIS_MODULE, |
1682 | .ct_attrs = nvmet_referral_attrs, |
1683 | .ct_item_ops = &nvmet_referral_item_ops, |
1684 | }; |
1685 | |
1686 | static struct config_group *nvmet_referral_make( |
1687 | struct config_group *group, const char *name) |
1688 | { |
1689 | struct nvmet_port *port; |
1690 | |
1691 | port = kzalloc(size: sizeof(*port), GFP_KERNEL); |
1692 | if (!port) |
1693 | return ERR_PTR(error: -ENOMEM); |
1694 | |
1695 | INIT_LIST_HEAD(list: &port->entry); |
1696 | config_group_init_type_name(group: &port->group, name, type: &nvmet_referral_type); |
1697 | |
1698 | return &port->group; |
1699 | } |
1700 | |
1701 | static struct configfs_group_operations nvmet_referral_group_ops = { |
1702 | .make_group = nvmet_referral_make, |
1703 | .disconnect_notify = nvmet_referral_notify, |
1704 | }; |
1705 | |
1706 | static const struct config_item_type nvmet_referrals_type = { |
1707 | .ct_owner = THIS_MODULE, |
1708 | .ct_group_ops = &nvmet_referral_group_ops, |
1709 | }; |
1710 | |
1711 | static struct nvmet_type_name_map nvmet_ana_state[] = { |
1712 | { NVME_ANA_OPTIMIZED, "optimized" }, |
1713 | { NVME_ANA_NONOPTIMIZED, "non-optimized" }, |
1714 | { NVME_ANA_INACCESSIBLE, "inaccessible" }, |
1715 | { NVME_ANA_PERSISTENT_LOSS, "persistent-loss" }, |
1716 | { NVME_ANA_CHANGE, "change" }, |
1717 | }; |
1718 | |
1719 | static ssize_t nvmet_ana_group_ana_state_show(struct config_item *item, |
1720 | char *page) |
1721 | { |
1722 | struct nvmet_ana_group *grp = to_ana_group(item); |
1723 | enum nvme_ana_state state = grp->port->ana_state[grp->grpid]; |
1724 | int i; |
1725 | |
1726 | for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) { |
1727 | if (state == nvmet_ana_state[i].type) |
1728 | return sprintf(buf: page, fmt: "%s\n" , nvmet_ana_state[i].name); |
1729 | } |
1730 | |
1731 | return sprintf(buf: page, fmt: "\n" ); |
1732 | } |
1733 | |
1734 | static ssize_t nvmet_ana_group_ana_state_store(struct config_item *item, |
1735 | const char *page, size_t count) |
1736 | { |
1737 | struct nvmet_ana_group *grp = to_ana_group(item); |
1738 | enum nvme_ana_state *ana_state = grp->port->ana_state; |
1739 | int i; |
1740 | |
1741 | for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) { |
1742 | if (sysfs_streq(s1: page, s2: nvmet_ana_state[i].name)) |
1743 | goto found; |
1744 | } |
1745 | |
1746 | pr_err("Invalid value '%s' for ana_state\n" , page); |
1747 | return -EINVAL; |
1748 | |
1749 | found: |
1750 | down_write(sem: &nvmet_ana_sem); |
1751 | ana_state[grp->grpid] = (enum nvme_ana_state) nvmet_ana_state[i].type; |
1752 | nvmet_ana_chgcnt++; |
1753 | up_write(sem: &nvmet_ana_sem); |
1754 | nvmet_port_send_ana_event(port: grp->port); |
1755 | return count; |
1756 | } |
1757 | |
1758 | CONFIGFS_ATTR(nvmet_ana_group_, ana_state); |
1759 | |
1760 | static struct configfs_attribute *nvmet_ana_group_attrs[] = { |
1761 | &nvmet_ana_group_attr_ana_state, |
1762 | NULL, |
1763 | }; |
1764 | |
1765 | static void nvmet_ana_group_release(struct config_item *item) |
1766 | { |
1767 | struct nvmet_ana_group *grp = to_ana_group(item); |
1768 | |
1769 | if (grp == &grp->port->ana_default_group) |
1770 | return; |
1771 | |
1772 | down_write(sem: &nvmet_ana_sem); |
1773 | grp->port->ana_state[grp->grpid] = NVME_ANA_INACCESSIBLE; |
1774 | nvmet_ana_group_enabled[grp->grpid]--; |
1775 | up_write(sem: &nvmet_ana_sem); |
1776 | |
1777 | nvmet_port_send_ana_event(port: grp->port); |
1778 | kfree(objp: grp); |
1779 | } |
1780 | |
1781 | static struct configfs_item_operations nvmet_ana_group_item_ops = { |
1782 | .release = nvmet_ana_group_release, |
1783 | }; |
1784 | |
1785 | static const struct config_item_type nvmet_ana_group_type = { |
1786 | .ct_item_ops = &nvmet_ana_group_item_ops, |
1787 | .ct_attrs = nvmet_ana_group_attrs, |
1788 | .ct_owner = THIS_MODULE, |
1789 | }; |
1790 | |
1791 | static struct config_group *nvmet_ana_groups_make_group( |
1792 | struct config_group *group, const char *name) |
1793 | { |
1794 | struct nvmet_port *port = ana_groups_to_port(item: &group->cg_item); |
1795 | struct nvmet_ana_group *grp; |
1796 | u32 grpid; |
1797 | int ret; |
1798 | |
1799 | ret = kstrtou32(s: name, base: 0, res: &grpid); |
1800 | if (ret) |
1801 | goto out; |
1802 | |
1803 | ret = -EINVAL; |
1804 | if (grpid <= 1 || grpid > NVMET_MAX_ANAGRPS) |
1805 | goto out; |
1806 | |
1807 | ret = -ENOMEM; |
1808 | grp = kzalloc(size: sizeof(*grp), GFP_KERNEL); |
1809 | if (!grp) |
1810 | goto out; |
1811 | grp->port = port; |
1812 | grp->grpid = grpid; |
1813 | |
1814 | down_write(sem: &nvmet_ana_sem); |
1815 | nvmet_ana_group_enabled[grpid]++; |
1816 | up_write(sem: &nvmet_ana_sem); |
1817 | |
1818 | nvmet_port_send_ana_event(port: grp->port); |
1819 | |
1820 | config_group_init_type_name(group: &grp->group, name, type: &nvmet_ana_group_type); |
1821 | return &grp->group; |
1822 | out: |
1823 | return ERR_PTR(error: ret); |
1824 | } |
1825 | |
1826 | static struct configfs_group_operations nvmet_ana_groups_group_ops = { |
1827 | .make_group = nvmet_ana_groups_make_group, |
1828 | }; |
1829 | |
1830 | static const struct config_item_type nvmet_ana_groups_type = { |
1831 | .ct_group_ops = &nvmet_ana_groups_group_ops, |
1832 | .ct_owner = THIS_MODULE, |
1833 | }; |
1834 | |
1835 | /* |
1836 | * Ports definitions. |
1837 | */ |
1838 | static void nvmet_port_release(struct config_item *item) |
1839 | { |
1840 | struct nvmet_port *port = to_nvmet_port(item); |
1841 | |
1842 | /* Let inflight controllers teardown complete */ |
1843 | flush_workqueue(nvmet_wq); |
1844 | list_del(entry: &port->global_entry); |
1845 | |
1846 | key_put(key: port->keyring); |
1847 | kfree(objp: port->ana_state); |
1848 | kfree(objp: port); |
1849 | } |
1850 | |
1851 | static struct configfs_attribute *nvmet_port_attrs[] = { |
1852 | &nvmet_attr_addr_adrfam, |
1853 | &nvmet_attr_addr_treq, |
1854 | &nvmet_attr_addr_traddr, |
1855 | &nvmet_attr_addr_trsvcid, |
1856 | &nvmet_attr_addr_trtype, |
1857 | &nvmet_attr_addr_tsas, |
1858 | &nvmet_attr_param_inline_data_size, |
1859 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
1860 | &nvmet_attr_param_pi_enable, |
1861 | #endif |
1862 | NULL, |
1863 | }; |
1864 | |
1865 | static struct configfs_item_operations nvmet_port_item_ops = { |
1866 | .release = nvmet_port_release, |
1867 | }; |
1868 | |
1869 | static const struct config_item_type nvmet_port_type = { |
1870 | .ct_attrs = nvmet_port_attrs, |
1871 | .ct_item_ops = &nvmet_port_item_ops, |
1872 | .ct_owner = THIS_MODULE, |
1873 | }; |
1874 | |
1875 | static struct config_group *nvmet_ports_make(struct config_group *group, |
1876 | const char *name) |
1877 | { |
1878 | struct nvmet_port *port; |
1879 | u16 portid; |
1880 | u32 i; |
1881 | |
1882 | if (kstrtou16(s: name, base: 0, res: &portid)) |
1883 | return ERR_PTR(error: -EINVAL); |
1884 | |
1885 | port = kzalloc(size: sizeof(*port), GFP_KERNEL); |
1886 | if (!port) |
1887 | return ERR_PTR(error: -ENOMEM); |
1888 | |
1889 | port->ana_state = kcalloc(NVMET_MAX_ANAGRPS + 1, |
1890 | size: sizeof(*port->ana_state), GFP_KERNEL); |
1891 | if (!port->ana_state) { |
1892 | kfree(objp: port); |
1893 | return ERR_PTR(error: -ENOMEM); |
1894 | } |
1895 | |
1896 | if (nvme_keyring_id()) { |
1897 | port->keyring = key_lookup(id: nvme_keyring_id()); |
1898 | if (IS_ERR(ptr: port->keyring)) { |
1899 | pr_warn("NVMe keyring not available, disabling TLS\n" ); |
1900 | port->keyring = NULL; |
1901 | } |
1902 | } |
1903 | |
1904 | for (i = 1; i <= NVMET_MAX_ANAGRPS; i++) { |
1905 | if (i == NVMET_DEFAULT_ANA_GRPID) |
1906 | port->ana_state[1] = NVME_ANA_OPTIMIZED; |
1907 | else |
1908 | port->ana_state[i] = NVME_ANA_INACCESSIBLE; |
1909 | } |
1910 | |
1911 | list_add(new: &port->global_entry, head: &nvmet_ports_list); |
1912 | |
1913 | INIT_LIST_HEAD(list: &port->entry); |
1914 | INIT_LIST_HEAD(list: &port->subsystems); |
1915 | INIT_LIST_HEAD(list: &port->referrals); |
1916 | port->inline_data_size = -1; /* < 0 == let the transport choose */ |
1917 | |
1918 | port->disc_addr.portid = cpu_to_le16(portid); |
1919 | port->disc_addr.adrfam = NVMF_ADDR_FAMILY_MAX; |
1920 | port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW; |
1921 | config_group_init_type_name(group: &port->group, name, type: &nvmet_port_type); |
1922 | |
1923 | config_group_init_type_name(group: &port->subsys_group, |
1924 | name: "subsystems" , type: &nvmet_port_subsys_type); |
1925 | configfs_add_default_group(new_group: &port->subsys_group, group: &port->group); |
1926 | |
1927 | config_group_init_type_name(group: &port->referrals_group, |
1928 | name: "referrals" , type: &nvmet_referrals_type); |
1929 | configfs_add_default_group(new_group: &port->referrals_group, group: &port->group); |
1930 | |
1931 | config_group_init_type_name(group: &port->ana_groups_group, |
1932 | name: "ana_groups" , type: &nvmet_ana_groups_type); |
1933 | configfs_add_default_group(new_group: &port->ana_groups_group, group: &port->group); |
1934 | |
1935 | port->ana_default_group.port = port; |
1936 | port->ana_default_group.grpid = NVMET_DEFAULT_ANA_GRPID; |
1937 | config_group_init_type_name(group: &port->ana_default_group.group, |
1938 | __stringify(NVMET_DEFAULT_ANA_GRPID), |
1939 | type: &nvmet_ana_group_type); |
1940 | configfs_add_default_group(new_group: &port->ana_default_group.group, |
1941 | group: &port->ana_groups_group); |
1942 | |
1943 | return &port->group; |
1944 | } |
1945 | |
1946 | static struct configfs_group_operations nvmet_ports_group_ops = { |
1947 | .make_group = nvmet_ports_make, |
1948 | }; |
1949 | |
1950 | static const struct config_item_type nvmet_ports_type = { |
1951 | .ct_group_ops = &nvmet_ports_group_ops, |
1952 | .ct_owner = THIS_MODULE, |
1953 | }; |
1954 | |
1955 | static struct config_group nvmet_subsystems_group; |
1956 | static struct config_group nvmet_ports_group; |
1957 | |
1958 | #ifdef CONFIG_NVME_TARGET_AUTH |
1959 | static ssize_t nvmet_host_dhchap_key_show(struct config_item *item, |
1960 | char *page) |
1961 | { |
1962 | u8 *dhchap_secret = to_host(item)->dhchap_secret; |
1963 | |
1964 | if (!dhchap_secret) |
1965 | return sprintf(buf: page, fmt: "\n" ); |
1966 | return sprintf(buf: page, fmt: "%s\n" , dhchap_secret); |
1967 | } |
1968 | |
1969 | static ssize_t nvmet_host_dhchap_key_store(struct config_item *item, |
1970 | const char *page, size_t count) |
1971 | { |
1972 | struct nvmet_host *host = to_host(item); |
1973 | int ret; |
1974 | |
1975 | ret = nvmet_auth_set_key(host, secret: page, set_ctrl: false); |
1976 | /* |
1977 | * Re-authentication is a soft state, so keep the |
1978 | * current authentication valid until the host |
1979 | * requests re-authentication. |
1980 | */ |
1981 | return ret < 0 ? ret : count; |
1982 | } |
1983 | |
1984 | CONFIGFS_ATTR(nvmet_host_, dhchap_key); |
1985 | |
1986 | static ssize_t nvmet_host_dhchap_ctrl_key_show(struct config_item *item, |
1987 | char *page) |
1988 | { |
1989 | u8 *dhchap_secret = to_host(item)->dhchap_ctrl_secret; |
1990 | |
1991 | if (!dhchap_secret) |
1992 | return sprintf(buf: page, fmt: "\n" ); |
1993 | return sprintf(buf: page, fmt: "%s\n" , dhchap_secret); |
1994 | } |
1995 | |
1996 | static ssize_t nvmet_host_dhchap_ctrl_key_store(struct config_item *item, |
1997 | const char *page, size_t count) |
1998 | { |
1999 | struct nvmet_host *host = to_host(item); |
2000 | int ret; |
2001 | |
2002 | ret = nvmet_auth_set_key(host, secret: page, set_ctrl: true); |
2003 | /* |
2004 | * Re-authentication is a soft state, so keep the |
2005 | * current authentication valid until the host |
2006 | * requests re-authentication. |
2007 | */ |
2008 | return ret < 0 ? ret : count; |
2009 | } |
2010 | |
2011 | CONFIGFS_ATTR(nvmet_host_, dhchap_ctrl_key); |
2012 | |
2013 | static ssize_t nvmet_host_dhchap_hash_show(struct config_item *item, |
2014 | char *page) |
2015 | { |
2016 | struct nvmet_host *host = to_host(item); |
2017 | const char *hash_name = nvme_auth_hmac_name(hmac_id: host->dhchap_hash_id); |
2018 | |
2019 | return sprintf(buf: page, fmt: "%s\n" , hash_name ? hash_name : "none" ); |
2020 | } |
2021 | |
2022 | static ssize_t nvmet_host_dhchap_hash_store(struct config_item *item, |
2023 | const char *page, size_t count) |
2024 | { |
2025 | struct nvmet_host *host = to_host(item); |
2026 | u8 hmac_id; |
2027 | |
2028 | hmac_id = nvme_auth_hmac_id(hmac_name: page); |
2029 | if (hmac_id == NVME_AUTH_HASH_INVALID) |
2030 | return -EINVAL; |
2031 | if (!crypto_has_shash(alg_name: nvme_auth_hmac_name(hmac_id), type: 0, mask: 0)) |
2032 | return -ENOTSUPP; |
2033 | host->dhchap_hash_id = hmac_id; |
2034 | return count; |
2035 | } |
2036 | |
2037 | CONFIGFS_ATTR(nvmet_host_, dhchap_hash); |
2038 | |
2039 | static ssize_t nvmet_host_dhchap_dhgroup_show(struct config_item *item, |
2040 | char *page) |
2041 | { |
2042 | struct nvmet_host *host = to_host(item); |
2043 | const char *dhgroup = nvme_auth_dhgroup_name(dhgroup_id: host->dhchap_dhgroup_id); |
2044 | |
2045 | return sprintf(buf: page, fmt: "%s\n" , dhgroup ? dhgroup : "none" ); |
2046 | } |
2047 | |
2048 | static ssize_t nvmet_host_dhchap_dhgroup_store(struct config_item *item, |
2049 | const char *page, size_t count) |
2050 | { |
2051 | struct nvmet_host *host = to_host(item); |
2052 | int dhgroup_id; |
2053 | |
2054 | dhgroup_id = nvme_auth_dhgroup_id(dhgroup_name: page); |
2055 | if (dhgroup_id == NVME_AUTH_DHGROUP_INVALID) |
2056 | return -EINVAL; |
2057 | if (dhgroup_id != NVME_AUTH_DHGROUP_NULL) { |
2058 | const char *kpp = nvme_auth_dhgroup_kpp(dhgroup_id); |
2059 | |
2060 | if (!crypto_has_kpp(alg_name: kpp, type: 0, mask: 0)) |
2061 | return -EINVAL; |
2062 | } |
2063 | host->dhchap_dhgroup_id = dhgroup_id; |
2064 | return count; |
2065 | } |
2066 | |
2067 | CONFIGFS_ATTR(nvmet_host_, dhchap_dhgroup); |
2068 | |
2069 | static struct configfs_attribute *nvmet_host_attrs[] = { |
2070 | &nvmet_host_attr_dhchap_key, |
2071 | &nvmet_host_attr_dhchap_ctrl_key, |
2072 | &nvmet_host_attr_dhchap_hash, |
2073 | &nvmet_host_attr_dhchap_dhgroup, |
2074 | NULL, |
2075 | }; |
2076 | #endif /* CONFIG_NVME_TARGET_AUTH */ |
2077 | |
2078 | static void nvmet_host_release(struct config_item *item) |
2079 | { |
2080 | struct nvmet_host *host = to_host(item); |
2081 | |
2082 | #ifdef CONFIG_NVME_TARGET_AUTH |
2083 | kfree(objp: host->dhchap_secret); |
2084 | kfree(objp: host->dhchap_ctrl_secret); |
2085 | #endif |
2086 | kfree(objp: host); |
2087 | } |
2088 | |
2089 | static struct configfs_item_operations nvmet_host_item_ops = { |
2090 | .release = nvmet_host_release, |
2091 | }; |
2092 | |
2093 | static const struct config_item_type nvmet_host_type = { |
2094 | .ct_item_ops = &nvmet_host_item_ops, |
2095 | #ifdef CONFIG_NVME_TARGET_AUTH |
2096 | .ct_attrs = nvmet_host_attrs, |
2097 | #endif |
2098 | .ct_owner = THIS_MODULE, |
2099 | }; |
2100 | |
2101 | static struct config_group *nvmet_hosts_make_group(struct config_group *group, |
2102 | const char *name) |
2103 | { |
2104 | struct nvmet_host *host; |
2105 | |
2106 | host = kzalloc(size: sizeof(*host), GFP_KERNEL); |
2107 | if (!host) |
2108 | return ERR_PTR(error: -ENOMEM); |
2109 | |
2110 | #ifdef CONFIG_NVME_TARGET_AUTH |
2111 | /* Default to SHA256 */ |
2112 | host->dhchap_hash_id = NVME_AUTH_HASH_SHA256; |
2113 | #endif |
2114 | |
2115 | config_group_init_type_name(group: &host->group, name, type: &nvmet_host_type); |
2116 | |
2117 | return &host->group; |
2118 | } |
2119 | |
2120 | static struct configfs_group_operations nvmet_hosts_group_ops = { |
2121 | .make_group = nvmet_hosts_make_group, |
2122 | }; |
2123 | |
2124 | static const struct config_item_type nvmet_hosts_type = { |
2125 | .ct_group_ops = &nvmet_hosts_group_ops, |
2126 | .ct_owner = THIS_MODULE, |
2127 | }; |
2128 | |
2129 | static struct config_group nvmet_hosts_group; |
2130 | |
2131 | static const struct config_item_type nvmet_root_type = { |
2132 | .ct_owner = THIS_MODULE, |
2133 | }; |
2134 | |
2135 | static struct configfs_subsystem nvmet_configfs_subsystem = { |
2136 | .su_group = { |
2137 | .cg_item = { |
2138 | .ci_namebuf = "nvmet" , |
2139 | .ci_type = &nvmet_root_type, |
2140 | }, |
2141 | }, |
2142 | }; |
2143 | |
2144 | int __init nvmet_init_configfs(void) |
2145 | { |
2146 | int ret; |
2147 | |
2148 | config_group_init(group: &nvmet_configfs_subsystem.su_group); |
2149 | mutex_init(&nvmet_configfs_subsystem.su_mutex); |
2150 | |
2151 | config_group_init_type_name(group: &nvmet_subsystems_group, |
2152 | name: "subsystems" , type: &nvmet_subsystems_type); |
2153 | configfs_add_default_group(new_group: &nvmet_subsystems_group, |
2154 | group: &nvmet_configfs_subsystem.su_group); |
2155 | |
2156 | config_group_init_type_name(group: &nvmet_ports_group, |
2157 | name: "ports" , type: &nvmet_ports_type); |
2158 | configfs_add_default_group(new_group: &nvmet_ports_group, |
2159 | group: &nvmet_configfs_subsystem.su_group); |
2160 | |
2161 | config_group_init_type_name(group: &nvmet_hosts_group, |
2162 | name: "hosts" , type: &nvmet_hosts_type); |
2163 | configfs_add_default_group(new_group: &nvmet_hosts_group, |
2164 | group: &nvmet_configfs_subsystem.su_group); |
2165 | |
2166 | ret = configfs_register_subsystem(subsys: &nvmet_configfs_subsystem); |
2167 | if (ret) { |
2168 | pr_err("configfs_register_subsystem: %d\n" , ret); |
2169 | return ret; |
2170 | } |
2171 | |
2172 | return 0; |
2173 | } |
2174 | |
2175 | void __exit nvmet_exit_configfs(void) |
2176 | { |
2177 | configfs_unregister_subsystem(subsys: &nvmet_configfs_subsystem); |
2178 | } |
2179 | |