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 | #include <linux/nospec.h> |
22 | |
23 | #include "nvmet.h" |
24 | |
25 | static const struct config_item_type nvmet_host_type; |
26 | static const struct config_item_type nvmet_subsys_type; |
27 | |
28 | static LIST_HEAD(nvmet_ports_list); |
29 | struct list_head *nvmet_ports = &nvmet_ports_list; |
30 | |
31 | struct nvmet_type_name_map { |
32 | u8 type; |
33 | const char *name; |
34 | }; |
35 | |
36 | static struct nvmet_type_name_map nvmet_transport[] = { |
37 | { NVMF_TRTYPE_RDMA, "rdma" }, |
38 | { NVMF_TRTYPE_FC, "fc" }, |
39 | { NVMF_TRTYPE_TCP, "tcp" }, |
40 | { NVMF_TRTYPE_LOOP, "loop" }, |
41 | }; |
42 | |
43 | static const struct nvmet_type_name_map nvmet_addr_family[] = { |
44 | { NVMF_ADDR_FAMILY_PCI, "pcie" }, |
45 | { NVMF_ADDR_FAMILY_IP4, "ipv4" }, |
46 | { NVMF_ADDR_FAMILY_IP6, "ipv6" }, |
47 | { NVMF_ADDR_FAMILY_IB, "ib" }, |
48 | { NVMF_ADDR_FAMILY_FC, "fc" }, |
49 | { NVMF_ADDR_FAMILY_LOOP, "loop" }, |
50 | }; |
51 | |
52 | static bool nvmet_is_port_enabled(struct nvmet_port *p, const char *caller) |
53 | { |
54 | if (p->enabled) |
55 | pr_err("Disable port '%u' before changing attribute in %s\n" , |
56 | le16_to_cpu(p->disc_addr.portid), caller); |
57 | return p->enabled; |
58 | } |
59 | |
60 | /* |
61 | * nvmet_port Generic ConfigFS definitions. |
62 | * Used in any place in the ConfigFS tree that refers to an address. |
63 | */ |
64 | static ssize_t nvmet_addr_adrfam_show(struct config_item *item, char *page) |
65 | { |
66 | u8 adrfam = to_nvmet_port(item)->disc_addr.adrfam; |
67 | int i; |
68 | |
69 | for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { |
70 | if (nvmet_addr_family[i].type == adrfam) |
71 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , |
72 | nvmet_addr_family[i].name); |
73 | } |
74 | |
75 | return snprintf(buf: page, PAGE_SIZE, fmt: "\n" ); |
76 | } |
77 | |
78 | static ssize_t nvmet_addr_adrfam_store(struct config_item *item, |
79 | const char *page, size_t count) |
80 | { |
81 | struct nvmet_port *port = to_nvmet_port(item); |
82 | int i; |
83 | |
84 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
85 | return -EACCES; |
86 | |
87 | for (i = 1; i < ARRAY_SIZE(nvmet_addr_family); i++) { |
88 | if (sysfs_streq(s1: page, s2: nvmet_addr_family[i].name)) |
89 | goto found; |
90 | } |
91 | |
92 | pr_err("Invalid value '%s' for adrfam\n" , page); |
93 | return -EINVAL; |
94 | |
95 | found: |
96 | port->disc_addr.adrfam = nvmet_addr_family[i].type; |
97 | return count; |
98 | } |
99 | |
100 | CONFIGFS_ATTR(nvmet_, addr_adrfam); |
101 | |
102 | static ssize_t nvmet_addr_portid_show(struct config_item *item, |
103 | char *page) |
104 | { |
105 | __le16 portid = to_nvmet_port(item)->disc_addr.portid; |
106 | |
107 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , le16_to_cpu(portid)); |
108 | } |
109 | |
110 | static ssize_t nvmet_addr_portid_store(struct config_item *item, |
111 | const char *page, size_t count) |
112 | { |
113 | struct nvmet_port *port = to_nvmet_port(item); |
114 | u16 portid = 0; |
115 | |
116 | if (kstrtou16(s: page, base: 0, res: &portid)) { |
117 | pr_err("Invalid value '%s' for portid\n" , page); |
118 | return -EINVAL; |
119 | } |
120 | |
121 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
122 | return -EACCES; |
123 | |
124 | port->disc_addr.portid = cpu_to_le16(portid); |
125 | return count; |
126 | } |
127 | |
128 | CONFIGFS_ATTR(nvmet_, addr_portid); |
129 | |
130 | static ssize_t nvmet_addr_traddr_show(struct config_item *item, |
131 | char *page) |
132 | { |
133 | struct nvmet_port *port = to_nvmet_port(item); |
134 | |
135 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , port->disc_addr.traddr); |
136 | } |
137 | |
138 | static ssize_t nvmet_addr_traddr_store(struct config_item *item, |
139 | const char *page, size_t count) |
140 | { |
141 | struct nvmet_port *port = to_nvmet_port(item); |
142 | |
143 | if (count > NVMF_TRADDR_SIZE) { |
144 | pr_err("Invalid value '%s' for traddr\n" , page); |
145 | return -EINVAL; |
146 | } |
147 | |
148 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
149 | return -EACCES; |
150 | |
151 | if (sscanf(page, "%s\n" , port->disc_addr.traddr) != 1) |
152 | return -EINVAL; |
153 | return count; |
154 | } |
155 | |
156 | CONFIGFS_ATTR(nvmet_, addr_traddr); |
157 | |
158 | static const struct nvmet_type_name_map nvmet_addr_treq[] = { |
159 | { NVMF_TREQ_NOT_SPECIFIED, "not specified" }, |
160 | { NVMF_TREQ_REQUIRED, "required" }, |
161 | { NVMF_TREQ_NOT_REQUIRED, "not required" }, |
162 | }; |
163 | |
164 | static inline u8 nvmet_port_disc_addr_treq_mask(struct nvmet_port *port) |
165 | { |
166 | return (port->disc_addr.treq & ~NVME_TREQ_SECURE_CHANNEL_MASK); |
167 | } |
168 | |
169 | static ssize_t nvmet_addr_treq_show(struct config_item *item, char *page) |
170 | { |
171 | u8 treq = nvmet_port_disc_addr_treq_secure_channel(port: to_nvmet_port(item)); |
172 | int i; |
173 | |
174 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) { |
175 | if (treq == nvmet_addr_treq[i].type) |
176 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , |
177 | nvmet_addr_treq[i].name); |
178 | } |
179 | |
180 | return snprintf(buf: page, PAGE_SIZE, fmt: "\n" ); |
181 | } |
182 | |
183 | static ssize_t nvmet_addr_treq_store(struct config_item *item, |
184 | const char *page, size_t count) |
185 | { |
186 | struct nvmet_port *port = to_nvmet_port(item); |
187 | u8 treq = nvmet_port_disc_addr_treq_mask(port); |
188 | int i; |
189 | |
190 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
191 | return -EACCES; |
192 | |
193 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_treq); i++) { |
194 | if (sysfs_streq(s1: page, s2: nvmet_addr_treq[i].name)) |
195 | goto found; |
196 | } |
197 | |
198 | pr_err("Invalid value '%s' for treq\n" , page); |
199 | return -EINVAL; |
200 | |
201 | found: |
202 | if (port->disc_addr.trtype == NVMF_TRTYPE_TCP && |
203 | port->disc_addr.tsas.tcp.sectype == NVMF_TCP_SECTYPE_TLS13) { |
204 | switch (nvmet_addr_treq[i].type) { |
205 | case NVMF_TREQ_NOT_SPECIFIED: |
206 | pr_debug("treq '%s' not allowed for TLS1.3\n" , |
207 | nvmet_addr_treq[i].name); |
208 | return -EINVAL; |
209 | case NVMF_TREQ_NOT_REQUIRED: |
210 | pr_warn("Allow non-TLS connections while TLS1.3 is enabled\n" ); |
211 | break; |
212 | default: |
213 | break; |
214 | } |
215 | } |
216 | treq |= nvmet_addr_treq[i].type; |
217 | port->disc_addr.treq = treq; |
218 | return count; |
219 | } |
220 | |
221 | CONFIGFS_ATTR(nvmet_, addr_treq); |
222 | |
223 | static ssize_t nvmet_addr_trsvcid_show(struct config_item *item, |
224 | char *page) |
225 | { |
226 | struct nvmet_port *port = to_nvmet_port(item); |
227 | |
228 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , port->disc_addr.trsvcid); |
229 | } |
230 | |
231 | static ssize_t nvmet_addr_trsvcid_store(struct config_item *item, |
232 | const char *page, size_t count) |
233 | { |
234 | struct nvmet_port *port = to_nvmet_port(item); |
235 | |
236 | if (count > NVMF_TRSVCID_SIZE) { |
237 | pr_err("Invalid value '%s' for trsvcid\n" , page); |
238 | return -EINVAL; |
239 | } |
240 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
241 | return -EACCES; |
242 | |
243 | if (sscanf(page, "%s\n" , port->disc_addr.trsvcid) != 1) |
244 | return -EINVAL; |
245 | return count; |
246 | } |
247 | |
248 | CONFIGFS_ATTR(nvmet_, addr_trsvcid); |
249 | |
250 | static ssize_t nvmet_param_inline_data_size_show(struct config_item *item, |
251 | char *page) |
252 | { |
253 | struct nvmet_port *port = to_nvmet_port(item); |
254 | |
255 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , port->inline_data_size); |
256 | } |
257 | |
258 | static ssize_t nvmet_param_inline_data_size_store(struct config_item *item, |
259 | const char *page, size_t count) |
260 | { |
261 | struct nvmet_port *port = to_nvmet_port(item); |
262 | int ret; |
263 | |
264 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
265 | return -EACCES; |
266 | ret = kstrtoint(s: page, base: 0, res: &port->inline_data_size); |
267 | if (ret) { |
268 | pr_err("Invalid value '%s' for inline_data_size\n" , page); |
269 | return -EINVAL; |
270 | } |
271 | return count; |
272 | } |
273 | |
274 | CONFIGFS_ATTR(nvmet_, param_inline_data_size); |
275 | |
276 | static ssize_t nvmet_param_max_queue_size_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->max_queue_size); |
282 | } |
283 | |
284 | static ssize_t nvmet_param_max_queue_size_store(struct config_item *item, |
285 | const char *page, size_t count) |
286 | { |
287 | struct nvmet_port *port = to_nvmet_port(item); |
288 | int ret; |
289 | |
290 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
291 | return -EACCES; |
292 | ret = kstrtoint(s: page, base: 0, res: &port->max_queue_size); |
293 | if (ret) { |
294 | pr_err("Invalid value '%s' for max_queue_size\n" , page); |
295 | return -EINVAL; |
296 | } |
297 | return count; |
298 | } |
299 | |
300 | CONFIGFS_ATTR(nvmet_, param_max_queue_size); |
301 | |
302 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
303 | static ssize_t nvmet_param_pi_enable_show(struct config_item *item, |
304 | char *page) |
305 | { |
306 | struct nvmet_port *port = to_nvmet_port(item); |
307 | |
308 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , port->pi_enable); |
309 | } |
310 | |
311 | static ssize_t nvmet_param_pi_enable_store(struct config_item *item, |
312 | const char *page, size_t count) |
313 | { |
314 | struct nvmet_port *port = to_nvmet_port(item); |
315 | bool val; |
316 | |
317 | if (kstrtobool(s: page, res: &val)) |
318 | return -EINVAL; |
319 | |
320 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
321 | return -EACCES; |
322 | |
323 | port->pi_enable = val; |
324 | return count; |
325 | } |
326 | |
327 | CONFIGFS_ATTR(nvmet_, param_pi_enable); |
328 | #endif |
329 | |
330 | static ssize_t nvmet_addr_trtype_show(struct config_item *item, |
331 | char *page) |
332 | { |
333 | struct nvmet_port *port = to_nvmet_port(item); |
334 | int i; |
335 | |
336 | for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { |
337 | if (port->disc_addr.trtype == nvmet_transport[i].type) |
338 | return snprintf(buf: page, PAGE_SIZE, |
339 | fmt: "%s\n" , nvmet_transport[i].name); |
340 | } |
341 | |
342 | return sprintf(buf: page, fmt: "\n" ); |
343 | } |
344 | |
345 | static void nvmet_port_init_tsas_rdma(struct nvmet_port *port) |
346 | { |
347 | port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED; |
348 | port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED; |
349 | port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM; |
350 | } |
351 | |
352 | static void nvmet_port_init_tsas_tcp(struct nvmet_port *port, int sectype) |
353 | { |
354 | port->disc_addr.tsas.tcp.sectype = sectype; |
355 | } |
356 | |
357 | static ssize_t nvmet_addr_trtype_store(struct config_item *item, |
358 | const char *page, size_t count) |
359 | { |
360 | struct nvmet_port *port = to_nvmet_port(item); |
361 | int i; |
362 | |
363 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
364 | return -EACCES; |
365 | |
366 | for (i = 0; i < ARRAY_SIZE(nvmet_transport); i++) { |
367 | if (sysfs_streq(s1: page, s2: nvmet_transport[i].name)) |
368 | goto found; |
369 | } |
370 | |
371 | pr_err("Invalid value '%s' for trtype\n" , page); |
372 | return -EINVAL; |
373 | |
374 | found: |
375 | memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE); |
376 | port->disc_addr.trtype = nvmet_transport[i].type; |
377 | if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) |
378 | nvmet_port_init_tsas_rdma(port); |
379 | else if (port->disc_addr.trtype == NVMF_TRTYPE_TCP) |
380 | nvmet_port_init_tsas_tcp(port, sectype: NVMF_TCP_SECTYPE_NONE); |
381 | return count; |
382 | } |
383 | |
384 | CONFIGFS_ATTR(nvmet_, addr_trtype); |
385 | |
386 | static const struct nvmet_type_name_map nvmet_addr_tsas_tcp[] = { |
387 | { NVMF_TCP_SECTYPE_NONE, "none" }, |
388 | { NVMF_TCP_SECTYPE_TLS13, "tls1.3" }, |
389 | }; |
390 | |
391 | static const struct nvmet_type_name_map nvmet_addr_tsas_rdma[] = { |
392 | { NVMF_RDMA_QPTYPE_CONNECTED, "connected" }, |
393 | { NVMF_RDMA_QPTYPE_DATAGRAM, "datagram" }, |
394 | }; |
395 | |
396 | static ssize_t nvmet_addr_tsas_show(struct config_item *item, |
397 | char *page) |
398 | { |
399 | struct nvmet_port *port = to_nvmet_port(item); |
400 | int i; |
401 | |
402 | if (port->disc_addr.trtype == NVMF_TRTYPE_TCP) { |
403 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_tsas_tcp); i++) { |
404 | if (port->disc_addr.tsas.tcp.sectype == nvmet_addr_tsas_tcp[i].type) |
405 | return sprintf(buf: page, fmt: "%s\n" , nvmet_addr_tsas_tcp[i].name); |
406 | } |
407 | } else if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA) { |
408 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_tsas_rdma); i++) { |
409 | if (port->disc_addr.tsas.rdma.qptype == nvmet_addr_tsas_rdma[i].type) |
410 | return sprintf(buf: page, fmt: "%s\n" , nvmet_addr_tsas_rdma[i].name); |
411 | } |
412 | } |
413 | return sprintf(buf: page, fmt: "reserved\n" ); |
414 | } |
415 | |
416 | static ssize_t nvmet_addr_tsas_store(struct config_item *item, |
417 | const char *page, size_t count) |
418 | { |
419 | struct nvmet_port *port = to_nvmet_port(item); |
420 | u8 treq = nvmet_port_disc_addr_treq_mask(port); |
421 | u8 sectype; |
422 | int i; |
423 | |
424 | if (nvmet_is_port_enabled(p: port, caller: __func__)) |
425 | return -EACCES; |
426 | |
427 | if (port->disc_addr.trtype != NVMF_TRTYPE_TCP) |
428 | return -EINVAL; |
429 | |
430 | for (i = 0; i < ARRAY_SIZE(nvmet_addr_tsas_tcp); i++) { |
431 | if (sysfs_streq(s1: page, s2: nvmet_addr_tsas_tcp[i].name)) { |
432 | sectype = nvmet_addr_tsas_tcp[i].type; |
433 | goto found; |
434 | } |
435 | } |
436 | |
437 | pr_err("Invalid value '%s' for tsas\n" , page); |
438 | return -EINVAL; |
439 | |
440 | found: |
441 | if (sectype == NVMF_TCP_SECTYPE_TLS13) { |
442 | if (!IS_ENABLED(CONFIG_NVME_TARGET_TCP_TLS)) { |
443 | pr_err("TLS is not supported\n" ); |
444 | return -EINVAL; |
445 | } |
446 | if (!port->keyring) { |
447 | pr_err("TLS keyring not configured\n" ); |
448 | return -EINVAL; |
449 | } |
450 | } |
451 | |
452 | nvmet_port_init_tsas_tcp(port, sectype); |
453 | /* |
454 | * If TLS is enabled TREQ should be set to 'required' per default |
455 | */ |
456 | if (sectype == NVMF_TCP_SECTYPE_TLS13) { |
457 | u8 sc = nvmet_port_disc_addr_treq_secure_channel(port); |
458 | |
459 | if (sc == NVMF_TREQ_NOT_SPECIFIED) |
460 | treq |= NVMF_TREQ_REQUIRED; |
461 | else |
462 | treq |= sc; |
463 | } else { |
464 | treq |= NVMF_TREQ_NOT_SPECIFIED; |
465 | } |
466 | port->disc_addr.treq = treq; |
467 | return count; |
468 | } |
469 | |
470 | CONFIGFS_ATTR(nvmet_, addr_tsas); |
471 | |
472 | /* |
473 | * Namespace structures & file operation functions below |
474 | */ |
475 | static ssize_t nvmet_ns_device_path_show(struct config_item *item, char *page) |
476 | { |
477 | return sprintf(buf: page, fmt: "%s\n" , to_nvmet_ns(item)->device_path); |
478 | } |
479 | |
480 | static ssize_t nvmet_ns_device_path_store(struct config_item *item, |
481 | const char *page, size_t count) |
482 | { |
483 | struct nvmet_ns *ns = to_nvmet_ns(item); |
484 | struct nvmet_subsys *subsys = ns->subsys; |
485 | size_t len; |
486 | int ret; |
487 | |
488 | mutex_lock(&subsys->lock); |
489 | ret = -EBUSY; |
490 | if (ns->enabled) |
491 | goto out_unlock; |
492 | |
493 | ret = -EINVAL; |
494 | len = strcspn(page, "\n" ); |
495 | if (!len) |
496 | goto out_unlock; |
497 | |
498 | kfree(objp: ns->device_path); |
499 | ret = -ENOMEM; |
500 | ns->device_path = kmemdup_nul(s: page, len, GFP_KERNEL); |
501 | if (!ns->device_path) |
502 | goto out_unlock; |
503 | |
504 | mutex_unlock(lock: &subsys->lock); |
505 | return count; |
506 | |
507 | out_unlock: |
508 | mutex_unlock(lock: &subsys->lock); |
509 | return ret; |
510 | } |
511 | |
512 | CONFIGFS_ATTR(nvmet_ns_, device_path); |
513 | |
514 | #ifdef CONFIG_PCI_P2PDMA |
515 | static ssize_t nvmet_ns_p2pmem_show(struct config_item *item, char *page) |
516 | { |
517 | struct nvmet_ns *ns = to_nvmet_ns(item); |
518 | |
519 | return pci_p2pdma_enable_show(page, p2p_dev: ns->p2p_dev, use_p2pdma: ns->use_p2pmem); |
520 | } |
521 | |
522 | static ssize_t nvmet_ns_p2pmem_store(struct config_item *item, |
523 | const char *page, size_t count) |
524 | { |
525 | struct nvmet_ns *ns = to_nvmet_ns(item); |
526 | struct pci_dev *p2p_dev = NULL; |
527 | bool use_p2pmem; |
528 | int ret = count; |
529 | int error; |
530 | |
531 | mutex_lock(&ns->subsys->lock); |
532 | if (ns->enabled) { |
533 | ret = -EBUSY; |
534 | goto out_unlock; |
535 | } |
536 | |
537 | error = pci_p2pdma_enable_store(page, p2p_dev: &p2p_dev, use_p2pdma: &use_p2pmem); |
538 | if (error) { |
539 | ret = error; |
540 | goto out_unlock; |
541 | } |
542 | |
543 | ns->use_p2pmem = use_p2pmem; |
544 | pci_dev_put(dev: ns->p2p_dev); |
545 | ns->p2p_dev = p2p_dev; |
546 | |
547 | out_unlock: |
548 | mutex_unlock(lock: &ns->subsys->lock); |
549 | |
550 | return ret; |
551 | } |
552 | |
553 | CONFIGFS_ATTR(nvmet_ns_, p2pmem); |
554 | #endif /* CONFIG_PCI_P2PDMA */ |
555 | |
556 | static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page) |
557 | { |
558 | return sprintf(buf: page, fmt: "%pUb\n" , &to_nvmet_ns(item)->uuid); |
559 | } |
560 | |
561 | static ssize_t nvmet_ns_device_uuid_store(struct config_item *item, |
562 | const char *page, size_t count) |
563 | { |
564 | struct nvmet_ns *ns = to_nvmet_ns(item); |
565 | struct nvmet_subsys *subsys = ns->subsys; |
566 | int ret = 0; |
567 | |
568 | mutex_lock(&subsys->lock); |
569 | if (ns->enabled) { |
570 | ret = -EBUSY; |
571 | goto out_unlock; |
572 | } |
573 | |
574 | if (uuid_parse(uuid: page, u: &ns->uuid)) |
575 | ret = -EINVAL; |
576 | |
577 | out_unlock: |
578 | mutex_unlock(lock: &subsys->lock); |
579 | return ret ? ret : count; |
580 | } |
581 | |
582 | CONFIGFS_ATTR(nvmet_ns_, device_uuid); |
583 | |
584 | static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page) |
585 | { |
586 | return sprintf(buf: page, fmt: "%pUb\n" , &to_nvmet_ns(item)->nguid); |
587 | } |
588 | |
589 | static ssize_t nvmet_ns_device_nguid_store(struct config_item *item, |
590 | const char *page, size_t count) |
591 | { |
592 | struct nvmet_ns *ns = to_nvmet_ns(item); |
593 | struct nvmet_subsys *subsys = ns->subsys; |
594 | u8 nguid[16]; |
595 | const char *p = page; |
596 | int i; |
597 | int ret = 0; |
598 | |
599 | mutex_lock(&subsys->lock); |
600 | if (ns->enabled) { |
601 | ret = -EBUSY; |
602 | goto out_unlock; |
603 | } |
604 | |
605 | for (i = 0; i < 16; i++) { |
606 | if (p + 2 > page + count) { |
607 | ret = -EINVAL; |
608 | goto out_unlock; |
609 | } |
610 | if (!isxdigit(p[0]) || !isxdigit(p[1])) { |
611 | ret = -EINVAL; |
612 | goto out_unlock; |
613 | } |
614 | |
615 | nguid[i] = (hex_to_bin(ch: p[0]) << 4) | hex_to_bin(ch: p[1]); |
616 | p += 2; |
617 | |
618 | if (*p == '-' || *p == ':') |
619 | p++; |
620 | } |
621 | |
622 | memcpy(&ns->nguid, nguid, sizeof(nguid)); |
623 | out_unlock: |
624 | mutex_unlock(lock: &subsys->lock); |
625 | return ret ? ret : count; |
626 | } |
627 | |
628 | CONFIGFS_ATTR(nvmet_ns_, device_nguid); |
629 | |
630 | static ssize_t nvmet_ns_ana_grpid_show(struct config_item *item, char *page) |
631 | { |
632 | return sprintf(buf: page, fmt: "%u\n" , to_nvmet_ns(item)->anagrpid); |
633 | } |
634 | |
635 | static ssize_t nvmet_ns_ana_grpid_store(struct config_item *item, |
636 | const char *page, size_t count) |
637 | { |
638 | struct nvmet_ns *ns = to_nvmet_ns(item); |
639 | u32 oldgrpid, newgrpid; |
640 | int ret; |
641 | |
642 | ret = kstrtou32(s: page, base: 0, res: &newgrpid); |
643 | if (ret) |
644 | return ret; |
645 | |
646 | if (newgrpid < 1 || newgrpid > NVMET_MAX_ANAGRPS) |
647 | return -EINVAL; |
648 | |
649 | down_write(sem: &nvmet_ana_sem); |
650 | oldgrpid = ns->anagrpid; |
651 | newgrpid = array_index_nospec(newgrpid, NVMET_MAX_ANAGRPS); |
652 | nvmet_ana_group_enabled[newgrpid]++; |
653 | ns->anagrpid = newgrpid; |
654 | nvmet_ana_group_enabled[oldgrpid]--; |
655 | nvmet_ana_chgcnt++; |
656 | up_write(sem: &nvmet_ana_sem); |
657 | |
658 | nvmet_send_ana_event(subsys: ns->subsys, NULL); |
659 | return count; |
660 | } |
661 | |
662 | CONFIGFS_ATTR(nvmet_ns_, ana_grpid); |
663 | |
664 | static ssize_t nvmet_ns_enable_show(struct config_item *item, char *page) |
665 | { |
666 | return sprintf(buf: page, fmt: "%d\n" , to_nvmet_ns(item)->enabled); |
667 | } |
668 | |
669 | static ssize_t nvmet_ns_enable_store(struct config_item *item, |
670 | const char *page, size_t count) |
671 | { |
672 | struct nvmet_ns *ns = to_nvmet_ns(item); |
673 | bool enable; |
674 | int ret = 0; |
675 | |
676 | if (kstrtobool(s: page, res: &enable)) |
677 | return -EINVAL; |
678 | |
679 | if (enable) |
680 | ret = nvmet_ns_enable(ns); |
681 | else |
682 | nvmet_ns_disable(ns); |
683 | |
684 | return ret ? ret : count; |
685 | } |
686 | |
687 | CONFIGFS_ATTR(nvmet_ns_, enable); |
688 | |
689 | static ssize_t nvmet_ns_buffered_io_show(struct config_item *item, char *page) |
690 | { |
691 | return sprintf(buf: page, fmt: "%d\n" , to_nvmet_ns(item)->buffered_io); |
692 | } |
693 | |
694 | static ssize_t nvmet_ns_buffered_io_store(struct config_item *item, |
695 | const char *page, size_t count) |
696 | { |
697 | struct nvmet_ns *ns = to_nvmet_ns(item); |
698 | bool val; |
699 | |
700 | if (kstrtobool(s: page, res: &val)) |
701 | return -EINVAL; |
702 | |
703 | mutex_lock(&ns->subsys->lock); |
704 | if (ns->enabled) { |
705 | pr_err("disable ns before setting buffered_io value.\n" ); |
706 | mutex_unlock(lock: &ns->subsys->lock); |
707 | return -EINVAL; |
708 | } |
709 | |
710 | ns->buffered_io = val; |
711 | mutex_unlock(lock: &ns->subsys->lock); |
712 | return count; |
713 | } |
714 | |
715 | CONFIGFS_ATTR(nvmet_ns_, buffered_io); |
716 | |
717 | static ssize_t nvmet_ns_revalidate_size_store(struct config_item *item, |
718 | const char *page, size_t count) |
719 | { |
720 | struct nvmet_ns *ns = to_nvmet_ns(item); |
721 | bool val; |
722 | |
723 | if (kstrtobool(s: page, res: &val)) |
724 | return -EINVAL; |
725 | |
726 | if (!val) |
727 | return -EINVAL; |
728 | |
729 | mutex_lock(&ns->subsys->lock); |
730 | if (!ns->enabled) { |
731 | pr_err("enable ns before revalidate.\n" ); |
732 | mutex_unlock(lock: &ns->subsys->lock); |
733 | return -EINVAL; |
734 | } |
735 | if (nvmet_ns_revalidate(ns)) |
736 | nvmet_ns_changed(subsys: ns->subsys, nsid: ns->nsid); |
737 | mutex_unlock(lock: &ns->subsys->lock); |
738 | return count; |
739 | } |
740 | |
741 | CONFIGFS_ATTR_WO(nvmet_ns_, revalidate_size); |
742 | |
743 | static struct configfs_attribute *nvmet_ns_attrs[] = { |
744 | &nvmet_ns_attr_device_path, |
745 | &nvmet_ns_attr_device_nguid, |
746 | &nvmet_ns_attr_device_uuid, |
747 | &nvmet_ns_attr_ana_grpid, |
748 | &nvmet_ns_attr_enable, |
749 | &nvmet_ns_attr_buffered_io, |
750 | &nvmet_ns_attr_revalidate_size, |
751 | #ifdef CONFIG_PCI_P2PDMA |
752 | &nvmet_ns_attr_p2pmem, |
753 | #endif |
754 | NULL, |
755 | }; |
756 | |
757 | static void nvmet_ns_release(struct config_item *item) |
758 | { |
759 | struct nvmet_ns *ns = to_nvmet_ns(item); |
760 | |
761 | nvmet_ns_free(ns); |
762 | } |
763 | |
764 | static struct configfs_item_operations nvmet_ns_item_ops = { |
765 | .release = nvmet_ns_release, |
766 | }; |
767 | |
768 | static const struct config_item_type nvmet_ns_type = { |
769 | .ct_item_ops = &nvmet_ns_item_ops, |
770 | .ct_attrs = nvmet_ns_attrs, |
771 | .ct_owner = THIS_MODULE, |
772 | }; |
773 | |
774 | static struct config_group *nvmet_ns_make(struct config_group *group, |
775 | const char *name) |
776 | { |
777 | struct nvmet_subsys *subsys = namespaces_to_subsys(item: &group->cg_item); |
778 | struct nvmet_ns *ns; |
779 | int ret; |
780 | u32 nsid; |
781 | |
782 | ret = kstrtou32(s: name, base: 0, res: &nsid); |
783 | if (ret) |
784 | goto out; |
785 | |
786 | ret = -EINVAL; |
787 | if (nsid == 0 || nsid == NVME_NSID_ALL) { |
788 | pr_err("invalid nsid %#x" , nsid); |
789 | goto out; |
790 | } |
791 | |
792 | ret = -ENOMEM; |
793 | ns = nvmet_ns_alloc(subsys, nsid); |
794 | if (!ns) |
795 | goto out; |
796 | config_group_init_type_name(group: &ns->group, name, type: &nvmet_ns_type); |
797 | |
798 | pr_info("adding nsid %d to subsystem %s\n" , nsid, subsys->subsysnqn); |
799 | |
800 | return &ns->group; |
801 | out: |
802 | return ERR_PTR(error: ret); |
803 | } |
804 | |
805 | static struct configfs_group_operations nvmet_namespaces_group_ops = { |
806 | .make_group = nvmet_ns_make, |
807 | }; |
808 | |
809 | static const struct config_item_type nvmet_namespaces_type = { |
810 | .ct_group_ops = &nvmet_namespaces_group_ops, |
811 | .ct_owner = THIS_MODULE, |
812 | }; |
813 | |
814 | #ifdef CONFIG_NVME_TARGET_PASSTHRU |
815 | |
816 | static ssize_t nvmet_passthru_device_path_show(struct config_item *item, |
817 | char *page) |
818 | { |
819 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
820 | |
821 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , subsys->passthru_ctrl_path); |
822 | } |
823 | |
824 | static ssize_t nvmet_passthru_device_path_store(struct config_item *item, |
825 | const char *page, size_t count) |
826 | { |
827 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
828 | size_t len; |
829 | int ret; |
830 | |
831 | mutex_lock(&subsys->lock); |
832 | |
833 | ret = -EBUSY; |
834 | if (subsys->passthru_ctrl) |
835 | goto out_unlock; |
836 | |
837 | ret = -EINVAL; |
838 | len = strcspn(page, "\n" ); |
839 | if (!len) |
840 | goto out_unlock; |
841 | |
842 | kfree(objp: subsys->passthru_ctrl_path); |
843 | ret = -ENOMEM; |
844 | subsys->passthru_ctrl_path = kstrndup(s: page, len, GFP_KERNEL); |
845 | if (!subsys->passthru_ctrl_path) |
846 | goto out_unlock; |
847 | |
848 | mutex_unlock(lock: &subsys->lock); |
849 | |
850 | return count; |
851 | out_unlock: |
852 | mutex_unlock(lock: &subsys->lock); |
853 | return ret; |
854 | } |
855 | CONFIGFS_ATTR(nvmet_passthru_, device_path); |
856 | |
857 | static ssize_t nvmet_passthru_enable_show(struct config_item *item, |
858 | char *page) |
859 | { |
860 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
861 | |
862 | return sprintf(buf: page, fmt: "%d\n" , subsys->passthru_ctrl ? 1 : 0); |
863 | } |
864 | |
865 | static ssize_t nvmet_passthru_enable_store(struct config_item *item, |
866 | const char *page, size_t count) |
867 | { |
868 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
869 | bool enable; |
870 | int ret = 0; |
871 | |
872 | if (kstrtobool(s: page, res: &enable)) |
873 | return -EINVAL; |
874 | |
875 | if (enable) |
876 | ret = nvmet_passthru_ctrl_enable(subsys); |
877 | else |
878 | nvmet_passthru_ctrl_disable(subsys); |
879 | |
880 | return ret ? ret : count; |
881 | } |
882 | CONFIGFS_ATTR(nvmet_passthru_, enable); |
883 | |
884 | static ssize_t nvmet_passthru_admin_timeout_show(struct config_item *item, |
885 | char *page) |
886 | { |
887 | return sprintf(buf: page, fmt: "%u\n" , to_subsys(item: item->ci_parent)->admin_timeout); |
888 | } |
889 | |
890 | static ssize_t nvmet_passthru_admin_timeout_store(struct config_item *item, |
891 | const char *page, size_t count) |
892 | { |
893 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
894 | unsigned int timeout; |
895 | |
896 | if (kstrtouint(s: page, base: 0, res: &timeout)) |
897 | return -EINVAL; |
898 | subsys->admin_timeout = timeout; |
899 | return count; |
900 | } |
901 | CONFIGFS_ATTR(nvmet_passthru_, admin_timeout); |
902 | |
903 | static ssize_t nvmet_passthru_io_timeout_show(struct config_item *item, |
904 | char *page) |
905 | { |
906 | return sprintf(buf: page, fmt: "%u\n" , to_subsys(item: item->ci_parent)->io_timeout); |
907 | } |
908 | |
909 | static ssize_t nvmet_passthru_io_timeout_store(struct config_item *item, |
910 | const char *page, size_t count) |
911 | { |
912 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
913 | unsigned int timeout; |
914 | |
915 | if (kstrtouint(s: page, base: 0, res: &timeout)) |
916 | return -EINVAL; |
917 | subsys->io_timeout = timeout; |
918 | return count; |
919 | } |
920 | CONFIGFS_ATTR(nvmet_passthru_, io_timeout); |
921 | |
922 | static ssize_t nvmet_passthru_clear_ids_show(struct config_item *item, |
923 | char *page) |
924 | { |
925 | return sprintf(buf: page, fmt: "%u\n" , to_subsys(item: item->ci_parent)->clear_ids); |
926 | } |
927 | |
928 | static ssize_t nvmet_passthru_clear_ids_store(struct config_item *item, |
929 | const char *page, size_t count) |
930 | { |
931 | struct nvmet_subsys *subsys = to_subsys(item: item->ci_parent); |
932 | unsigned int clear_ids; |
933 | |
934 | if (kstrtouint(s: page, base: 0, res: &clear_ids)) |
935 | return -EINVAL; |
936 | subsys->clear_ids = clear_ids; |
937 | return count; |
938 | } |
939 | CONFIGFS_ATTR(nvmet_passthru_, clear_ids); |
940 | |
941 | static struct configfs_attribute *nvmet_passthru_attrs[] = { |
942 | &nvmet_passthru_attr_device_path, |
943 | &nvmet_passthru_attr_enable, |
944 | &nvmet_passthru_attr_admin_timeout, |
945 | &nvmet_passthru_attr_io_timeout, |
946 | &nvmet_passthru_attr_clear_ids, |
947 | NULL, |
948 | }; |
949 | |
950 | static const struct config_item_type nvmet_passthru_type = { |
951 | .ct_attrs = nvmet_passthru_attrs, |
952 | .ct_owner = THIS_MODULE, |
953 | }; |
954 | |
955 | static void nvmet_add_passthru_group(struct nvmet_subsys *subsys) |
956 | { |
957 | config_group_init_type_name(group: &subsys->passthru_group, |
958 | name: "passthru" , type: &nvmet_passthru_type); |
959 | configfs_add_default_group(new_group: &subsys->passthru_group, |
960 | group: &subsys->group); |
961 | } |
962 | |
963 | #else /* CONFIG_NVME_TARGET_PASSTHRU */ |
964 | |
965 | static void nvmet_add_passthru_group(struct nvmet_subsys *subsys) |
966 | { |
967 | } |
968 | |
969 | #endif /* CONFIG_NVME_TARGET_PASSTHRU */ |
970 | |
971 | static int nvmet_port_subsys_allow_link(struct config_item *parent, |
972 | struct config_item *target) |
973 | { |
974 | struct nvmet_port *port = to_nvmet_port(item: parent->ci_parent); |
975 | struct nvmet_subsys *subsys; |
976 | struct nvmet_subsys_link *link, *p; |
977 | int ret; |
978 | |
979 | if (target->ci_type != &nvmet_subsys_type) { |
980 | pr_err("can only link subsystems into the subsystems dir.!\n" ); |
981 | return -EINVAL; |
982 | } |
983 | subsys = to_subsys(item: target); |
984 | link = kmalloc(size: sizeof(*link), GFP_KERNEL); |
985 | if (!link) |
986 | return -ENOMEM; |
987 | link->subsys = subsys; |
988 | |
989 | down_write(sem: &nvmet_config_sem); |
990 | ret = -EEXIST; |
991 | list_for_each_entry(p, &port->subsystems, entry) { |
992 | if (p->subsys == subsys) |
993 | goto out_free_link; |
994 | } |
995 | |
996 | if (list_empty(head: &port->subsystems)) { |
997 | ret = nvmet_enable_port(port); |
998 | if (ret) |
999 | goto out_free_link; |
1000 | } |
1001 | |
1002 | list_add_tail(new: &link->entry, head: &port->subsystems); |
1003 | nvmet_port_disc_changed(port, subsys); |
1004 | |
1005 | up_write(sem: &nvmet_config_sem); |
1006 | return 0; |
1007 | |
1008 | out_free_link: |
1009 | up_write(sem: &nvmet_config_sem); |
1010 | kfree(objp: link); |
1011 | return ret; |
1012 | } |
1013 | |
1014 | static void nvmet_port_subsys_drop_link(struct config_item *parent, |
1015 | struct config_item *target) |
1016 | { |
1017 | struct nvmet_port *port = to_nvmet_port(item: parent->ci_parent); |
1018 | struct nvmet_subsys *subsys = to_subsys(item: target); |
1019 | struct nvmet_subsys_link *p; |
1020 | |
1021 | down_write(sem: &nvmet_config_sem); |
1022 | list_for_each_entry(p, &port->subsystems, entry) { |
1023 | if (p->subsys == subsys) |
1024 | goto found; |
1025 | } |
1026 | up_write(sem: &nvmet_config_sem); |
1027 | return; |
1028 | |
1029 | found: |
1030 | list_del(entry: &p->entry); |
1031 | nvmet_port_del_ctrls(port, subsys); |
1032 | nvmet_port_disc_changed(port, subsys); |
1033 | |
1034 | if (list_empty(head: &port->subsystems)) |
1035 | nvmet_disable_port(port); |
1036 | up_write(sem: &nvmet_config_sem); |
1037 | kfree(objp: p); |
1038 | } |
1039 | |
1040 | static struct configfs_item_operations nvmet_port_subsys_item_ops = { |
1041 | .allow_link = nvmet_port_subsys_allow_link, |
1042 | .drop_link = nvmet_port_subsys_drop_link, |
1043 | }; |
1044 | |
1045 | static const struct config_item_type nvmet_port_subsys_type = { |
1046 | .ct_item_ops = &nvmet_port_subsys_item_ops, |
1047 | .ct_owner = THIS_MODULE, |
1048 | }; |
1049 | |
1050 | static int nvmet_allowed_hosts_allow_link(struct config_item *parent, |
1051 | struct config_item *target) |
1052 | { |
1053 | struct nvmet_subsys *subsys = to_subsys(item: parent->ci_parent); |
1054 | struct nvmet_host *host; |
1055 | struct nvmet_host_link *link, *p; |
1056 | int ret; |
1057 | |
1058 | if (target->ci_type != &nvmet_host_type) { |
1059 | pr_err("can only link hosts into the allowed_hosts directory!\n" ); |
1060 | return -EINVAL; |
1061 | } |
1062 | |
1063 | host = to_host(item: target); |
1064 | link = kmalloc(size: sizeof(*link), GFP_KERNEL); |
1065 | if (!link) |
1066 | return -ENOMEM; |
1067 | link->host = host; |
1068 | |
1069 | down_write(sem: &nvmet_config_sem); |
1070 | ret = -EINVAL; |
1071 | if (subsys->allow_any_host) { |
1072 | pr_err("can't add hosts when allow_any_host is set!\n" ); |
1073 | goto out_free_link; |
1074 | } |
1075 | |
1076 | ret = -EEXIST; |
1077 | list_for_each_entry(p, &subsys->hosts, entry) { |
1078 | if (!strcmp(nvmet_host_name(host: p->host), nvmet_host_name(host))) |
1079 | goto out_free_link; |
1080 | } |
1081 | list_add_tail(new: &link->entry, head: &subsys->hosts); |
1082 | nvmet_subsys_disc_changed(subsys, host); |
1083 | |
1084 | up_write(sem: &nvmet_config_sem); |
1085 | return 0; |
1086 | out_free_link: |
1087 | up_write(sem: &nvmet_config_sem); |
1088 | kfree(objp: link); |
1089 | return ret; |
1090 | } |
1091 | |
1092 | static void nvmet_allowed_hosts_drop_link(struct config_item *parent, |
1093 | struct config_item *target) |
1094 | { |
1095 | struct nvmet_subsys *subsys = to_subsys(item: parent->ci_parent); |
1096 | struct nvmet_host *host = to_host(item: target); |
1097 | struct nvmet_host_link *p; |
1098 | |
1099 | down_write(sem: &nvmet_config_sem); |
1100 | list_for_each_entry(p, &subsys->hosts, entry) { |
1101 | if (!strcmp(nvmet_host_name(host: p->host), nvmet_host_name(host))) |
1102 | goto found; |
1103 | } |
1104 | up_write(sem: &nvmet_config_sem); |
1105 | return; |
1106 | |
1107 | found: |
1108 | list_del(entry: &p->entry); |
1109 | nvmet_subsys_disc_changed(subsys, host); |
1110 | |
1111 | up_write(sem: &nvmet_config_sem); |
1112 | kfree(objp: p); |
1113 | } |
1114 | |
1115 | static struct configfs_item_operations nvmet_allowed_hosts_item_ops = { |
1116 | .allow_link = nvmet_allowed_hosts_allow_link, |
1117 | .drop_link = nvmet_allowed_hosts_drop_link, |
1118 | }; |
1119 | |
1120 | static const struct config_item_type nvmet_allowed_hosts_type = { |
1121 | .ct_item_ops = &nvmet_allowed_hosts_item_ops, |
1122 | .ct_owner = THIS_MODULE, |
1123 | }; |
1124 | |
1125 | static ssize_t nvmet_subsys_attr_allow_any_host_show(struct config_item *item, |
1126 | char *page) |
1127 | { |
1128 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , |
1129 | to_subsys(item)->allow_any_host); |
1130 | } |
1131 | |
1132 | static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, |
1133 | const char *page, size_t count) |
1134 | { |
1135 | struct nvmet_subsys *subsys = to_subsys(item); |
1136 | bool allow_any_host; |
1137 | int ret = 0; |
1138 | |
1139 | if (kstrtobool(s: page, res: &allow_any_host)) |
1140 | return -EINVAL; |
1141 | |
1142 | down_write(sem: &nvmet_config_sem); |
1143 | if (allow_any_host && !list_empty(head: &subsys->hosts)) { |
1144 | pr_err("Can't set allow_any_host when explicit hosts are set!\n" ); |
1145 | ret = -EINVAL; |
1146 | goto out_unlock; |
1147 | } |
1148 | |
1149 | if (subsys->allow_any_host != allow_any_host) { |
1150 | subsys->allow_any_host = allow_any_host; |
1151 | nvmet_subsys_disc_changed(subsys, NULL); |
1152 | } |
1153 | |
1154 | out_unlock: |
1155 | up_write(sem: &nvmet_config_sem); |
1156 | return ret ? ret : count; |
1157 | } |
1158 | |
1159 | CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); |
1160 | |
1161 | static ssize_t nvmet_subsys_attr_version_show(struct config_item *item, |
1162 | char *page) |
1163 | { |
1164 | struct nvmet_subsys *subsys = to_subsys(item); |
1165 | |
1166 | if (NVME_TERTIARY(subsys->ver)) |
1167 | return snprintf(buf: page, PAGE_SIZE, fmt: "%llu.%llu.%llu\n" , |
1168 | NVME_MAJOR(subsys->ver), |
1169 | NVME_MINOR(subsys->ver), |
1170 | NVME_TERTIARY(subsys->ver)); |
1171 | |
1172 | return snprintf(buf: page, PAGE_SIZE, fmt: "%llu.%llu\n" , |
1173 | NVME_MAJOR(subsys->ver), |
1174 | NVME_MINOR(subsys->ver)); |
1175 | } |
1176 | |
1177 | static ssize_t |
1178 | nvmet_subsys_attr_version_store_locked(struct nvmet_subsys *subsys, |
1179 | const char *page, size_t count) |
1180 | { |
1181 | int major, minor, tertiary = 0; |
1182 | int ret; |
1183 | |
1184 | if (subsys->subsys_discovered) { |
1185 | if (NVME_TERTIARY(subsys->ver)) |
1186 | pr_err("Can't set version number. %llu.%llu.%llu is already assigned\n" , |
1187 | NVME_MAJOR(subsys->ver), |
1188 | NVME_MINOR(subsys->ver), |
1189 | NVME_TERTIARY(subsys->ver)); |
1190 | else |
1191 | pr_err("Can't set version number. %llu.%llu is already assigned\n" , |
1192 | NVME_MAJOR(subsys->ver), |
1193 | NVME_MINOR(subsys->ver)); |
1194 | return -EINVAL; |
1195 | } |
1196 | |
1197 | /* passthru subsystems use the underlying controller's version */ |
1198 | if (nvmet_is_passthru_subsys(subsys)) |
1199 | return -EINVAL; |
1200 | |
1201 | ret = sscanf(page, "%d.%d.%d\n" , &major, &minor, &tertiary); |
1202 | if (ret != 2 && ret != 3) |
1203 | return -EINVAL; |
1204 | |
1205 | subsys->ver = NVME_VS(major, minor, tertiary); |
1206 | |
1207 | return count; |
1208 | } |
1209 | |
1210 | static ssize_t nvmet_subsys_attr_version_store(struct config_item *item, |
1211 | const char *page, size_t count) |
1212 | { |
1213 | struct nvmet_subsys *subsys = to_subsys(item); |
1214 | ssize_t ret; |
1215 | |
1216 | down_write(sem: &nvmet_config_sem); |
1217 | mutex_lock(&subsys->lock); |
1218 | ret = nvmet_subsys_attr_version_store_locked(subsys, page, count); |
1219 | mutex_unlock(lock: &subsys->lock); |
1220 | up_write(sem: &nvmet_config_sem); |
1221 | |
1222 | return ret; |
1223 | } |
1224 | CONFIGFS_ATTR(nvmet_subsys_, attr_version); |
1225 | |
1226 | /* See Section 1.5 of NVMe 1.4 */ |
1227 | static bool nvmet_is_ascii(const char c) |
1228 | { |
1229 | return c >= 0x20 && c <= 0x7e; |
1230 | } |
1231 | |
1232 | static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item, |
1233 | char *page) |
1234 | { |
1235 | struct nvmet_subsys *subsys = to_subsys(item); |
1236 | |
1237 | return snprintf(buf: page, PAGE_SIZE, fmt: "%.*s\n" , |
1238 | NVMET_SN_MAX_SIZE, subsys->serial); |
1239 | } |
1240 | |
1241 | static ssize_t |
1242 | nvmet_subsys_attr_serial_store_locked(struct nvmet_subsys *subsys, |
1243 | const char *page, size_t count) |
1244 | { |
1245 | int pos, len = strcspn(page, "\n" ); |
1246 | |
1247 | if (subsys->subsys_discovered) { |
1248 | pr_err("Can't set serial number. %s is already assigned\n" , |
1249 | subsys->serial); |
1250 | return -EINVAL; |
1251 | } |
1252 | |
1253 | if (!len || len > NVMET_SN_MAX_SIZE) { |
1254 | pr_err("Serial Number can not be empty or exceed %d Bytes\n" , |
1255 | NVMET_SN_MAX_SIZE); |
1256 | return -EINVAL; |
1257 | } |
1258 | |
1259 | for (pos = 0; pos < len; pos++) { |
1260 | if (!nvmet_is_ascii(c: page[pos])) { |
1261 | pr_err("Serial Number must contain only ASCII strings\n" ); |
1262 | return -EINVAL; |
1263 | } |
1264 | } |
1265 | |
1266 | memcpy_and_pad(dest: subsys->serial, NVMET_SN_MAX_SIZE, src: page, count: len, pad: ' '); |
1267 | |
1268 | return count; |
1269 | } |
1270 | |
1271 | static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item, |
1272 | const char *page, size_t count) |
1273 | { |
1274 | struct nvmet_subsys *subsys = to_subsys(item); |
1275 | ssize_t ret; |
1276 | |
1277 | down_write(sem: &nvmet_config_sem); |
1278 | mutex_lock(&subsys->lock); |
1279 | ret = nvmet_subsys_attr_serial_store_locked(subsys, page, count); |
1280 | mutex_unlock(lock: &subsys->lock); |
1281 | up_write(sem: &nvmet_config_sem); |
1282 | |
1283 | return ret; |
1284 | } |
1285 | CONFIGFS_ATTR(nvmet_subsys_, attr_serial); |
1286 | |
1287 | static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item, |
1288 | char *page) |
1289 | { |
1290 | return snprintf(buf: page, PAGE_SIZE, fmt: "%u\n" , to_subsys(item)->cntlid_min); |
1291 | } |
1292 | |
1293 | static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item, |
1294 | const char *page, size_t cnt) |
1295 | { |
1296 | u16 cntlid_min; |
1297 | |
1298 | if (sscanf(page, "%hu\n" , &cntlid_min) != 1) |
1299 | return -EINVAL; |
1300 | |
1301 | if (cntlid_min == 0) |
1302 | return -EINVAL; |
1303 | |
1304 | down_write(sem: &nvmet_config_sem); |
1305 | if (cntlid_min > to_subsys(item)->cntlid_max) |
1306 | goto out_unlock; |
1307 | to_subsys(item)->cntlid_min = cntlid_min; |
1308 | up_write(sem: &nvmet_config_sem); |
1309 | return cnt; |
1310 | |
1311 | out_unlock: |
1312 | up_write(sem: &nvmet_config_sem); |
1313 | return -EINVAL; |
1314 | } |
1315 | CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min); |
1316 | |
1317 | static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item, |
1318 | char *page) |
1319 | { |
1320 | return snprintf(buf: page, PAGE_SIZE, fmt: "%u\n" , to_subsys(item)->cntlid_max); |
1321 | } |
1322 | |
1323 | static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item, |
1324 | const char *page, size_t cnt) |
1325 | { |
1326 | u16 cntlid_max; |
1327 | |
1328 | if (sscanf(page, "%hu\n" , &cntlid_max) != 1) |
1329 | return -EINVAL; |
1330 | |
1331 | if (cntlid_max == 0) |
1332 | return -EINVAL; |
1333 | |
1334 | down_write(sem: &nvmet_config_sem); |
1335 | if (cntlid_max < to_subsys(item)->cntlid_min) |
1336 | goto out_unlock; |
1337 | to_subsys(item)->cntlid_max = cntlid_max; |
1338 | up_write(sem: &nvmet_config_sem); |
1339 | return cnt; |
1340 | |
1341 | out_unlock: |
1342 | up_write(sem: &nvmet_config_sem); |
1343 | return -EINVAL; |
1344 | } |
1345 | CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max); |
1346 | |
1347 | static ssize_t nvmet_subsys_attr_model_show(struct config_item *item, |
1348 | char *page) |
1349 | { |
1350 | struct nvmet_subsys *subsys = to_subsys(item); |
1351 | |
1352 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , subsys->model_number); |
1353 | } |
1354 | |
1355 | static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys, |
1356 | const char *page, size_t count) |
1357 | { |
1358 | int pos = 0, len; |
1359 | char *val; |
1360 | |
1361 | if (subsys->subsys_discovered) { |
1362 | pr_err("Can't set model number. %s is already assigned\n" , |
1363 | subsys->model_number); |
1364 | return -EINVAL; |
1365 | } |
1366 | |
1367 | len = strcspn(page, "\n" ); |
1368 | if (!len) |
1369 | return -EINVAL; |
1370 | |
1371 | if (len > NVMET_MN_MAX_SIZE) { |
1372 | pr_err("Model number size can not exceed %d Bytes\n" , |
1373 | NVMET_MN_MAX_SIZE); |
1374 | return -EINVAL; |
1375 | } |
1376 | |
1377 | for (pos = 0; pos < len; pos++) { |
1378 | if (!nvmet_is_ascii(c: page[pos])) |
1379 | return -EINVAL; |
1380 | } |
1381 | |
1382 | val = kmemdup_nul(s: page, len, GFP_KERNEL); |
1383 | if (!val) |
1384 | return -ENOMEM; |
1385 | kfree(objp: subsys->model_number); |
1386 | subsys->model_number = val; |
1387 | return count; |
1388 | } |
1389 | |
1390 | static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, |
1391 | const char *page, size_t count) |
1392 | { |
1393 | struct nvmet_subsys *subsys = to_subsys(item); |
1394 | ssize_t ret; |
1395 | |
1396 | down_write(sem: &nvmet_config_sem); |
1397 | mutex_lock(&subsys->lock); |
1398 | ret = nvmet_subsys_attr_model_store_locked(subsys, page, count); |
1399 | mutex_unlock(lock: &subsys->lock); |
1400 | up_write(sem: &nvmet_config_sem); |
1401 | |
1402 | return ret; |
1403 | } |
1404 | CONFIGFS_ATTR(nvmet_subsys_, attr_model); |
1405 | |
1406 | static ssize_t nvmet_subsys_attr_ieee_oui_show(struct config_item *item, |
1407 | char *page) |
1408 | { |
1409 | struct nvmet_subsys *subsys = to_subsys(item); |
1410 | |
1411 | return sysfs_emit(buf: page, fmt: "0x%06x\n" , subsys->ieee_oui); |
1412 | } |
1413 | |
1414 | static ssize_t nvmet_subsys_attr_ieee_oui_store_locked(struct nvmet_subsys *subsys, |
1415 | const char *page, size_t count) |
1416 | { |
1417 | uint32_t val = 0; |
1418 | int ret; |
1419 | |
1420 | if (subsys->subsys_discovered) { |
1421 | pr_err("Can't set IEEE OUI. 0x%06x is already assigned\n" , |
1422 | subsys->ieee_oui); |
1423 | return -EINVAL; |
1424 | } |
1425 | |
1426 | ret = kstrtou32(s: page, base: 0, res: &val); |
1427 | if (ret < 0) |
1428 | return ret; |
1429 | |
1430 | if (val >= 0x1000000) |
1431 | return -EINVAL; |
1432 | |
1433 | subsys->ieee_oui = val; |
1434 | |
1435 | return count; |
1436 | } |
1437 | |
1438 | static ssize_t nvmet_subsys_attr_ieee_oui_store(struct config_item *item, |
1439 | const char *page, size_t count) |
1440 | { |
1441 | struct nvmet_subsys *subsys = to_subsys(item); |
1442 | ssize_t ret; |
1443 | |
1444 | down_write(sem: &nvmet_config_sem); |
1445 | mutex_lock(&subsys->lock); |
1446 | ret = nvmet_subsys_attr_ieee_oui_store_locked(subsys, page, count); |
1447 | mutex_unlock(lock: &subsys->lock); |
1448 | up_write(sem: &nvmet_config_sem); |
1449 | |
1450 | return ret; |
1451 | } |
1452 | CONFIGFS_ATTR(nvmet_subsys_, attr_ieee_oui); |
1453 | |
1454 | static ssize_t nvmet_subsys_attr_firmware_show(struct config_item *item, |
1455 | char *page) |
1456 | { |
1457 | struct nvmet_subsys *subsys = to_subsys(item); |
1458 | |
1459 | return sysfs_emit(buf: page, fmt: "%s\n" , subsys->firmware_rev); |
1460 | } |
1461 | |
1462 | static ssize_t nvmet_subsys_attr_firmware_store_locked(struct nvmet_subsys *subsys, |
1463 | const char *page, size_t count) |
1464 | { |
1465 | int pos = 0, len; |
1466 | char *val; |
1467 | |
1468 | if (subsys->subsys_discovered) { |
1469 | pr_err("Can't set firmware revision. %s is already assigned\n" , |
1470 | subsys->firmware_rev); |
1471 | return -EINVAL; |
1472 | } |
1473 | |
1474 | len = strcspn(page, "\n" ); |
1475 | if (!len) |
1476 | return -EINVAL; |
1477 | |
1478 | if (len > NVMET_FR_MAX_SIZE) { |
1479 | pr_err("Firmware revision size can not exceed %d Bytes\n" , |
1480 | NVMET_FR_MAX_SIZE); |
1481 | return -EINVAL; |
1482 | } |
1483 | |
1484 | for (pos = 0; pos < len; pos++) { |
1485 | if (!nvmet_is_ascii(c: page[pos])) |
1486 | return -EINVAL; |
1487 | } |
1488 | |
1489 | val = kmemdup_nul(s: page, len, GFP_KERNEL); |
1490 | if (!val) |
1491 | return -ENOMEM; |
1492 | |
1493 | kfree(objp: subsys->firmware_rev); |
1494 | |
1495 | subsys->firmware_rev = val; |
1496 | |
1497 | return count; |
1498 | } |
1499 | |
1500 | static ssize_t nvmet_subsys_attr_firmware_store(struct config_item *item, |
1501 | const char *page, size_t count) |
1502 | { |
1503 | struct nvmet_subsys *subsys = to_subsys(item); |
1504 | ssize_t ret; |
1505 | |
1506 | down_write(sem: &nvmet_config_sem); |
1507 | mutex_lock(&subsys->lock); |
1508 | ret = nvmet_subsys_attr_firmware_store_locked(subsys, page, count); |
1509 | mutex_unlock(lock: &subsys->lock); |
1510 | up_write(sem: &nvmet_config_sem); |
1511 | |
1512 | return ret; |
1513 | } |
1514 | CONFIGFS_ATTR(nvmet_subsys_, attr_firmware); |
1515 | |
1516 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
1517 | static ssize_t nvmet_subsys_attr_pi_enable_show(struct config_item *item, |
1518 | char *page) |
1519 | { |
1520 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , to_subsys(item)->pi_support); |
1521 | } |
1522 | |
1523 | static ssize_t nvmet_subsys_attr_pi_enable_store(struct config_item *item, |
1524 | const char *page, size_t count) |
1525 | { |
1526 | struct nvmet_subsys *subsys = to_subsys(item); |
1527 | bool pi_enable; |
1528 | |
1529 | if (kstrtobool(s: page, res: &pi_enable)) |
1530 | return -EINVAL; |
1531 | |
1532 | subsys->pi_support = pi_enable; |
1533 | return count; |
1534 | } |
1535 | CONFIGFS_ATTR(nvmet_subsys_, attr_pi_enable); |
1536 | #endif |
1537 | |
1538 | static ssize_t nvmet_subsys_attr_qid_max_show(struct config_item *item, |
1539 | char *page) |
1540 | { |
1541 | return snprintf(buf: page, PAGE_SIZE, fmt: "%u\n" , to_subsys(item)->max_qid); |
1542 | } |
1543 | |
1544 | static ssize_t nvmet_subsys_attr_qid_max_store(struct config_item *item, |
1545 | const char *page, size_t cnt) |
1546 | { |
1547 | struct nvmet_subsys *subsys = to_subsys(item); |
1548 | struct nvmet_ctrl *ctrl; |
1549 | u16 qid_max; |
1550 | |
1551 | if (sscanf(page, "%hu\n" , &qid_max) != 1) |
1552 | return -EINVAL; |
1553 | |
1554 | if (qid_max < 1 || qid_max > NVMET_NR_QUEUES) |
1555 | return -EINVAL; |
1556 | |
1557 | down_write(sem: &nvmet_config_sem); |
1558 | subsys->max_qid = qid_max; |
1559 | |
1560 | /* Force reconnect */ |
1561 | list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) |
1562 | ctrl->ops->delete_ctrl(ctrl); |
1563 | up_write(sem: &nvmet_config_sem); |
1564 | |
1565 | return cnt; |
1566 | } |
1567 | CONFIGFS_ATTR(nvmet_subsys_, attr_qid_max); |
1568 | |
1569 | static struct configfs_attribute *nvmet_subsys_attrs[] = { |
1570 | &nvmet_subsys_attr_attr_allow_any_host, |
1571 | &nvmet_subsys_attr_attr_version, |
1572 | &nvmet_subsys_attr_attr_serial, |
1573 | &nvmet_subsys_attr_attr_cntlid_min, |
1574 | &nvmet_subsys_attr_attr_cntlid_max, |
1575 | &nvmet_subsys_attr_attr_model, |
1576 | &nvmet_subsys_attr_attr_qid_max, |
1577 | &nvmet_subsys_attr_attr_ieee_oui, |
1578 | &nvmet_subsys_attr_attr_firmware, |
1579 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
1580 | &nvmet_subsys_attr_attr_pi_enable, |
1581 | #endif |
1582 | NULL, |
1583 | }; |
1584 | |
1585 | /* |
1586 | * Subsystem structures & folder operation functions below |
1587 | */ |
1588 | static void nvmet_subsys_release(struct config_item *item) |
1589 | { |
1590 | struct nvmet_subsys *subsys = to_subsys(item); |
1591 | |
1592 | nvmet_subsys_del_ctrls(subsys); |
1593 | nvmet_subsys_put(subsys); |
1594 | } |
1595 | |
1596 | static struct configfs_item_operations nvmet_subsys_item_ops = { |
1597 | .release = nvmet_subsys_release, |
1598 | }; |
1599 | |
1600 | static const struct config_item_type nvmet_subsys_type = { |
1601 | .ct_item_ops = &nvmet_subsys_item_ops, |
1602 | .ct_attrs = nvmet_subsys_attrs, |
1603 | .ct_owner = THIS_MODULE, |
1604 | }; |
1605 | |
1606 | static struct config_group *nvmet_subsys_make(struct config_group *group, |
1607 | const char *name) |
1608 | { |
1609 | struct nvmet_subsys *subsys; |
1610 | |
1611 | if (sysfs_streq(s1: name, NVME_DISC_SUBSYS_NAME)) { |
1612 | pr_err("can't create discovery subsystem through configfs\n" ); |
1613 | return ERR_PTR(error: -EINVAL); |
1614 | } |
1615 | |
1616 | if (sysfs_streq(s1: name, s2: nvmet_disc_subsys->subsysnqn)) { |
1617 | pr_err("can't create subsystem using unique discovery NQN\n" ); |
1618 | return ERR_PTR(error: -EINVAL); |
1619 | } |
1620 | |
1621 | subsys = nvmet_subsys_alloc(subsysnqn: name, type: NVME_NQN_NVME); |
1622 | if (IS_ERR(ptr: subsys)) |
1623 | return ERR_CAST(ptr: subsys); |
1624 | |
1625 | config_group_init_type_name(group: &subsys->group, name, type: &nvmet_subsys_type); |
1626 | |
1627 | config_group_init_type_name(group: &subsys->namespaces_group, |
1628 | name: "namespaces" , type: &nvmet_namespaces_type); |
1629 | configfs_add_default_group(new_group: &subsys->namespaces_group, group: &subsys->group); |
1630 | |
1631 | config_group_init_type_name(group: &subsys->allowed_hosts_group, |
1632 | name: "allowed_hosts" , type: &nvmet_allowed_hosts_type); |
1633 | configfs_add_default_group(new_group: &subsys->allowed_hosts_group, |
1634 | group: &subsys->group); |
1635 | |
1636 | nvmet_add_passthru_group(subsys); |
1637 | |
1638 | return &subsys->group; |
1639 | } |
1640 | |
1641 | static struct configfs_group_operations nvmet_subsystems_group_ops = { |
1642 | .make_group = nvmet_subsys_make, |
1643 | }; |
1644 | |
1645 | static const struct config_item_type nvmet_subsystems_type = { |
1646 | .ct_group_ops = &nvmet_subsystems_group_ops, |
1647 | .ct_owner = THIS_MODULE, |
1648 | }; |
1649 | |
1650 | static ssize_t nvmet_referral_enable_show(struct config_item *item, |
1651 | char *page) |
1652 | { |
1653 | return snprintf(buf: page, PAGE_SIZE, fmt: "%d\n" , to_nvmet_port(item)->enabled); |
1654 | } |
1655 | |
1656 | static ssize_t nvmet_referral_enable_store(struct config_item *item, |
1657 | const char *page, size_t count) |
1658 | { |
1659 | struct nvmet_port *parent = to_nvmet_port(item: item->ci_parent->ci_parent); |
1660 | struct nvmet_port *port = to_nvmet_port(item); |
1661 | bool enable; |
1662 | |
1663 | if (kstrtobool(s: page, res: &enable)) |
1664 | goto inval; |
1665 | |
1666 | if (enable) |
1667 | nvmet_referral_enable(parent, port); |
1668 | else |
1669 | nvmet_referral_disable(parent, port); |
1670 | |
1671 | return count; |
1672 | inval: |
1673 | pr_err("Invalid value '%s' for enable\n" , page); |
1674 | return -EINVAL; |
1675 | } |
1676 | |
1677 | CONFIGFS_ATTR(nvmet_referral_, enable); |
1678 | |
1679 | /* |
1680 | * Discovery Service subsystem definitions |
1681 | */ |
1682 | static struct configfs_attribute *nvmet_referral_attrs[] = { |
1683 | &nvmet_attr_addr_adrfam, |
1684 | &nvmet_attr_addr_portid, |
1685 | &nvmet_attr_addr_treq, |
1686 | &nvmet_attr_addr_traddr, |
1687 | &nvmet_attr_addr_trsvcid, |
1688 | &nvmet_attr_addr_trtype, |
1689 | &nvmet_referral_attr_enable, |
1690 | NULL, |
1691 | }; |
1692 | |
1693 | static void nvmet_referral_notify(struct config_group *group, |
1694 | struct config_item *item) |
1695 | { |
1696 | struct nvmet_port *parent = to_nvmet_port(item: item->ci_parent->ci_parent); |
1697 | struct nvmet_port *port = to_nvmet_port(item); |
1698 | |
1699 | nvmet_referral_disable(parent, port); |
1700 | } |
1701 | |
1702 | static void nvmet_referral_release(struct config_item *item) |
1703 | { |
1704 | struct nvmet_port *port = to_nvmet_port(item); |
1705 | |
1706 | kfree(objp: port); |
1707 | } |
1708 | |
1709 | static struct configfs_item_operations nvmet_referral_item_ops = { |
1710 | .release = nvmet_referral_release, |
1711 | }; |
1712 | |
1713 | static const struct config_item_type nvmet_referral_type = { |
1714 | .ct_owner = THIS_MODULE, |
1715 | .ct_attrs = nvmet_referral_attrs, |
1716 | .ct_item_ops = &nvmet_referral_item_ops, |
1717 | }; |
1718 | |
1719 | static struct config_group *nvmet_referral_make( |
1720 | struct config_group *group, const char *name) |
1721 | { |
1722 | struct nvmet_port *port; |
1723 | |
1724 | port = kzalloc(size: sizeof(*port), GFP_KERNEL); |
1725 | if (!port) |
1726 | return ERR_PTR(error: -ENOMEM); |
1727 | |
1728 | INIT_LIST_HEAD(list: &port->entry); |
1729 | config_group_init_type_name(group: &port->group, name, type: &nvmet_referral_type); |
1730 | |
1731 | return &port->group; |
1732 | } |
1733 | |
1734 | static struct configfs_group_operations nvmet_referral_group_ops = { |
1735 | .make_group = nvmet_referral_make, |
1736 | .disconnect_notify = nvmet_referral_notify, |
1737 | }; |
1738 | |
1739 | static const struct config_item_type nvmet_referrals_type = { |
1740 | .ct_owner = THIS_MODULE, |
1741 | .ct_group_ops = &nvmet_referral_group_ops, |
1742 | }; |
1743 | |
1744 | static struct nvmet_type_name_map nvmet_ana_state[] = { |
1745 | { NVME_ANA_OPTIMIZED, "optimized" }, |
1746 | { NVME_ANA_NONOPTIMIZED, "non-optimized" }, |
1747 | { NVME_ANA_INACCESSIBLE, "inaccessible" }, |
1748 | { NVME_ANA_PERSISTENT_LOSS, "persistent-loss" }, |
1749 | { NVME_ANA_CHANGE, "change" }, |
1750 | }; |
1751 | |
1752 | static ssize_t nvmet_ana_group_ana_state_show(struct config_item *item, |
1753 | char *page) |
1754 | { |
1755 | struct nvmet_ana_group *grp = to_ana_group(item); |
1756 | enum nvme_ana_state state = grp->port->ana_state[grp->grpid]; |
1757 | int i; |
1758 | |
1759 | for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) { |
1760 | if (state == nvmet_ana_state[i].type) |
1761 | return sprintf(buf: page, fmt: "%s\n" , nvmet_ana_state[i].name); |
1762 | } |
1763 | |
1764 | return sprintf(buf: page, fmt: "\n" ); |
1765 | } |
1766 | |
1767 | static ssize_t nvmet_ana_group_ana_state_store(struct config_item *item, |
1768 | const char *page, size_t count) |
1769 | { |
1770 | struct nvmet_ana_group *grp = to_ana_group(item); |
1771 | enum nvme_ana_state *ana_state = grp->port->ana_state; |
1772 | int i; |
1773 | |
1774 | for (i = 0; i < ARRAY_SIZE(nvmet_ana_state); i++) { |
1775 | if (sysfs_streq(s1: page, s2: nvmet_ana_state[i].name)) |
1776 | goto found; |
1777 | } |
1778 | |
1779 | pr_err("Invalid value '%s' for ana_state\n" , page); |
1780 | return -EINVAL; |
1781 | |
1782 | found: |
1783 | down_write(sem: &nvmet_ana_sem); |
1784 | ana_state[grp->grpid] = (enum nvme_ana_state) nvmet_ana_state[i].type; |
1785 | nvmet_ana_chgcnt++; |
1786 | up_write(sem: &nvmet_ana_sem); |
1787 | nvmet_port_send_ana_event(port: grp->port); |
1788 | return count; |
1789 | } |
1790 | |
1791 | CONFIGFS_ATTR(nvmet_ana_group_, ana_state); |
1792 | |
1793 | static struct configfs_attribute *nvmet_ana_group_attrs[] = { |
1794 | &nvmet_ana_group_attr_ana_state, |
1795 | NULL, |
1796 | }; |
1797 | |
1798 | static void nvmet_ana_group_release(struct config_item *item) |
1799 | { |
1800 | struct nvmet_ana_group *grp = to_ana_group(item); |
1801 | |
1802 | if (grp == &grp->port->ana_default_group) |
1803 | return; |
1804 | |
1805 | down_write(sem: &nvmet_ana_sem); |
1806 | grp->port->ana_state[grp->grpid] = NVME_ANA_INACCESSIBLE; |
1807 | nvmet_ana_group_enabled[grp->grpid]--; |
1808 | up_write(sem: &nvmet_ana_sem); |
1809 | |
1810 | nvmet_port_send_ana_event(port: grp->port); |
1811 | kfree(objp: grp); |
1812 | } |
1813 | |
1814 | static struct configfs_item_operations nvmet_ana_group_item_ops = { |
1815 | .release = nvmet_ana_group_release, |
1816 | }; |
1817 | |
1818 | static const struct config_item_type nvmet_ana_group_type = { |
1819 | .ct_item_ops = &nvmet_ana_group_item_ops, |
1820 | .ct_attrs = nvmet_ana_group_attrs, |
1821 | .ct_owner = THIS_MODULE, |
1822 | }; |
1823 | |
1824 | static struct config_group *nvmet_ana_groups_make_group( |
1825 | struct config_group *group, const char *name) |
1826 | { |
1827 | struct nvmet_port *port = ana_groups_to_port(item: &group->cg_item); |
1828 | struct nvmet_ana_group *grp; |
1829 | u32 grpid; |
1830 | int ret; |
1831 | |
1832 | ret = kstrtou32(s: name, base: 0, res: &grpid); |
1833 | if (ret) |
1834 | goto out; |
1835 | |
1836 | ret = -EINVAL; |
1837 | if (grpid <= 1 || grpid > NVMET_MAX_ANAGRPS) |
1838 | goto out; |
1839 | |
1840 | ret = -ENOMEM; |
1841 | grp = kzalloc(size: sizeof(*grp), GFP_KERNEL); |
1842 | if (!grp) |
1843 | goto out; |
1844 | grp->port = port; |
1845 | grp->grpid = grpid; |
1846 | |
1847 | down_write(sem: &nvmet_ana_sem); |
1848 | grpid = array_index_nospec(grpid, NVMET_MAX_ANAGRPS); |
1849 | nvmet_ana_group_enabled[grpid]++; |
1850 | up_write(sem: &nvmet_ana_sem); |
1851 | |
1852 | nvmet_port_send_ana_event(port: grp->port); |
1853 | |
1854 | config_group_init_type_name(group: &grp->group, name, type: &nvmet_ana_group_type); |
1855 | return &grp->group; |
1856 | out: |
1857 | return ERR_PTR(error: ret); |
1858 | } |
1859 | |
1860 | static struct configfs_group_operations nvmet_ana_groups_group_ops = { |
1861 | .make_group = nvmet_ana_groups_make_group, |
1862 | }; |
1863 | |
1864 | static const struct config_item_type nvmet_ana_groups_type = { |
1865 | .ct_group_ops = &nvmet_ana_groups_group_ops, |
1866 | .ct_owner = THIS_MODULE, |
1867 | }; |
1868 | |
1869 | /* |
1870 | * Ports definitions. |
1871 | */ |
1872 | static void nvmet_port_release(struct config_item *item) |
1873 | { |
1874 | struct nvmet_port *port = to_nvmet_port(item); |
1875 | |
1876 | /* Let inflight controllers teardown complete */ |
1877 | flush_workqueue(nvmet_wq); |
1878 | list_del(entry: &port->global_entry); |
1879 | |
1880 | key_put(key: port->keyring); |
1881 | kfree(objp: port->ana_state); |
1882 | kfree(objp: port); |
1883 | } |
1884 | |
1885 | static struct configfs_attribute *nvmet_port_attrs[] = { |
1886 | &nvmet_attr_addr_adrfam, |
1887 | &nvmet_attr_addr_treq, |
1888 | &nvmet_attr_addr_traddr, |
1889 | &nvmet_attr_addr_trsvcid, |
1890 | &nvmet_attr_addr_trtype, |
1891 | &nvmet_attr_addr_tsas, |
1892 | &nvmet_attr_param_inline_data_size, |
1893 | &nvmet_attr_param_max_queue_size, |
1894 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
1895 | &nvmet_attr_param_pi_enable, |
1896 | #endif |
1897 | NULL, |
1898 | }; |
1899 | |
1900 | static struct configfs_item_operations nvmet_port_item_ops = { |
1901 | .release = nvmet_port_release, |
1902 | }; |
1903 | |
1904 | static const struct config_item_type nvmet_port_type = { |
1905 | .ct_attrs = nvmet_port_attrs, |
1906 | .ct_item_ops = &nvmet_port_item_ops, |
1907 | .ct_owner = THIS_MODULE, |
1908 | }; |
1909 | |
1910 | static struct config_group *nvmet_ports_make(struct config_group *group, |
1911 | const char *name) |
1912 | { |
1913 | struct nvmet_port *port; |
1914 | u16 portid; |
1915 | u32 i; |
1916 | |
1917 | if (kstrtou16(s: name, base: 0, res: &portid)) |
1918 | return ERR_PTR(error: -EINVAL); |
1919 | |
1920 | port = kzalloc(size: sizeof(*port), GFP_KERNEL); |
1921 | if (!port) |
1922 | return ERR_PTR(error: -ENOMEM); |
1923 | |
1924 | port->ana_state = kcalloc(NVMET_MAX_ANAGRPS + 1, |
1925 | size: sizeof(*port->ana_state), GFP_KERNEL); |
1926 | if (!port->ana_state) { |
1927 | kfree(objp: port); |
1928 | return ERR_PTR(error: -ENOMEM); |
1929 | } |
1930 | |
1931 | if (IS_ENABLED(CONFIG_NVME_TARGET_TCP_TLS) && nvme_keyring_id()) { |
1932 | port->keyring = key_lookup(id: nvme_keyring_id()); |
1933 | if (IS_ERR(ptr: port->keyring)) { |
1934 | pr_warn("NVMe keyring not available, disabling TLS\n" ); |
1935 | port->keyring = NULL; |
1936 | } |
1937 | } |
1938 | |
1939 | for (i = 1; i <= NVMET_MAX_ANAGRPS; i++) { |
1940 | if (i == NVMET_DEFAULT_ANA_GRPID) |
1941 | port->ana_state[1] = NVME_ANA_OPTIMIZED; |
1942 | else |
1943 | port->ana_state[i] = NVME_ANA_INACCESSIBLE; |
1944 | } |
1945 | |
1946 | list_add(new: &port->global_entry, head: &nvmet_ports_list); |
1947 | |
1948 | INIT_LIST_HEAD(list: &port->entry); |
1949 | INIT_LIST_HEAD(list: &port->subsystems); |
1950 | INIT_LIST_HEAD(list: &port->referrals); |
1951 | port->inline_data_size = -1; /* < 0 == let the transport choose */ |
1952 | port->max_queue_size = -1; /* < 0 == let the transport choose */ |
1953 | |
1954 | port->disc_addr.portid = cpu_to_le16(portid); |
1955 | port->disc_addr.adrfam = NVMF_ADDR_FAMILY_MAX; |
1956 | port->disc_addr.treq = NVMF_TREQ_DISABLE_SQFLOW; |
1957 | config_group_init_type_name(group: &port->group, name, type: &nvmet_port_type); |
1958 | |
1959 | config_group_init_type_name(group: &port->subsys_group, |
1960 | name: "subsystems" , type: &nvmet_port_subsys_type); |
1961 | configfs_add_default_group(new_group: &port->subsys_group, group: &port->group); |
1962 | |
1963 | config_group_init_type_name(group: &port->referrals_group, |
1964 | name: "referrals" , type: &nvmet_referrals_type); |
1965 | configfs_add_default_group(new_group: &port->referrals_group, group: &port->group); |
1966 | |
1967 | config_group_init_type_name(group: &port->ana_groups_group, |
1968 | name: "ana_groups" , type: &nvmet_ana_groups_type); |
1969 | configfs_add_default_group(new_group: &port->ana_groups_group, group: &port->group); |
1970 | |
1971 | port->ana_default_group.port = port; |
1972 | port->ana_default_group.grpid = NVMET_DEFAULT_ANA_GRPID; |
1973 | config_group_init_type_name(group: &port->ana_default_group.group, |
1974 | __stringify(NVMET_DEFAULT_ANA_GRPID), |
1975 | type: &nvmet_ana_group_type); |
1976 | configfs_add_default_group(new_group: &port->ana_default_group.group, |
1977 | group: &port->ana_groups_group); |
1978 | |
1979 | return &port->group; |
1980 | } |
1981 | |
1982 | static struct configfs_group_operations nvmet_ports_group_ops = { |
1983 | .make_group = nvmet_ports_make, |
1984 | }; |
1985 | |
1986 | static const struct config_item_type nvmet_ports_type = { |
1987 | .ct_group_ops = &nvmet_ports_group_ops, |
1988 | .ct_owner = THIS_MODULE, |
1989 | }; |
1990 | |
1991 | static struct config_group nvmet_subsystems_group; |
1992 | static struct config_group nvmet_ports_group; |
1993 | |
1994 | #ifdef CONFIG_NVME_TARGET_AUTH |
1995 | static ssize_t nvmet_host_dhchap_key_show(struct config_item *item, |
1996 | char *page) |
1997 | { |
1998 | u8 *dhchap_secret = to_host(item)->dhchap_secret; |
1999 | |
2000 | if (!dhchap_secret) |
2001 | return sprintf(buf: page, fmt: "\n" ); |
2002 | return sprintf(buf: page, fmt: "%s\n" , dhchap_secret); |
2003 | } |
2004 | |
2005 | static ssize_t nvmet_host_dhchap_key_store(struct config_item *item, |
2006 | const char *page, size_t count) |
2007 | { |
2008 | struct nvmet_host *host = to_host(item); |
2009 | int ret; |
2010 | |
2011 | ret = nvmet_auth_set_key(host, secret: page, set_ctrl: false); |
2012 | /* |
2013 | * Re-authentication is a soft state, so keep the |
2014 | * current authentication valid until the host |
2015 | * requests re-authentication. |
2016 | */ |
2017 | return ret < 0 ? ret : count; |
2018 | } |
2019 | |
2020 | CONFIGFS_ATTR(nvmet_host_, dhchap_key); |
2021 | |
2022 | static ssize_t nvmet_host_dhchap_ctrl_key_show(struct config_item *item, |
2023 | char *page) |
2024 | { |
2025 | u8 *dhchap_secret = to_host(item)->dhchap_ctrl_secret; |
2026 | |
2027 | if (!dhchap_secret) |
2028 | return sprintf(buf: page, fmt: "\n" ); |
2029 | return sprintf(buf: page, fmt: "%s\n" , dhchap_secret); |
2030 | } |
2031 | |
2032 | static ssize_t nvmet_host_dhchap_ctrl_key_store(struct config_item *item, |
2033 | const char *page, size_t count) |
2034 | { |
2035 | struct nvmet_host *host = to_host(item); |
2036 | int ret; |
2037 | |
2038 | ret = nvmet_auth_set_key(host, secret: page, set_ctrl: true); |
2039 | /* |
2040 | * Re-authentication is a soft state, so keep the |
2041 | * current authentication valid until the host |
2042 | * requests re-authentication. |
2043 | */ |
2044 | return ret < 0 ? ret : count; |
2045 | } |
2046 | |
2047 | CONFIGFS_ATTR(nvmet_host_, dhchap_ctrl_key); |
2048 | |
2049 | static ssize_t nvmet_host_dhchap_hash_show(struct config_item *item, |
2050 | char *page) |
2051 | { |
2052 | struct nvmet_host *host = to_host(item); |
2053 | const char *hash_name = nvme_auth_hmac_name(hmac_id: host->dhchap_hash_id); |
2054 | |
2055 | return sprintf(buf: page, fmt: "%s\n" , hash_name ? hash_name : "none" ); |
2056 | } |
2057 | |
2058 | static ssize_t nvmet_host_dhchap_hash_store(struct config_item *item, |
2059 | const char *page, size_t count) |
2060 | { |
2061 | struct nvmet_host *host = to_host(item); |
2062 | u8 hmac_id; |
2063 | |
2064 | hmac_id = nvme_auth_hmac_id(hmac_name: page); |
2065 | if (hmac_id == NVME_AUTH_HASH_INVALID) |
2066 | return -EINVAL; |
2067 | if (!crypto_has_shash(alg_name: nvme_auth_hmac_name(hmac_id), type: 0, mask: 0)) |
2068 | return -ENOTSUPP; |
2069 | host->dhchap_hash_id = hmac_id; |
2070 | return count; |
2071 | } |
2072 | |
2073 | CONFIGFS_ATTR(nvmet_host_, dhchap_hash); |
2074 | |
2075 | static ssize_t nvmet_host_dhchap_dhgroup_show(struct config_item *item, |
2076 | char *page) |
2077 | { |
2078 | struct nvmet_host *host = to_host(item); |
2079 | const char *dhgroup = nvme_auth_dhgroup_name(dhgroup_id: host->dhchap_dhgroup_id); |
2080 | |
2081 | return sprintf(buf: page, fmt: "%s\n" , dhgroup ? dhgroup : "none" ); |
2082 | } |
2083 | |
2084 | static ssize_t nvmet_host_dhchap_dhgroup_store(struct config_item *item, |
2085 | const char *page, size_t count) |
2086 | { |
2087 | struct nvmet_host *host = to_host(item); |
2088 | int dhgroup_id; |
2089 | |
2090 | dhgroup_id = nvme_auth_dhgroup_id(dhgroup_name: page); |
2091 | if (dhgroup_id == NVME_AUTH_DHGROUP_INVALID) |
2092 | return -EINVAL; |
2093 | if (dhgroup_id != NVME_AUTH_DHGROUP_NULL) { |
2094 | const char *kpp = nvme_auth_dhgroup_kpp(dhgroup_id); |
2095 | |
2096 | if (!crypto_has_kpp(alg_name: kpp, type: 0, mask: 0)) |
2097 | return -EINVAL; |
2098 | } |
2099 | host->dhchap_dhgroup_id = dhgroup_id; |
2100 | return count; |
2101 | } |
2102 | |
2103 | CONFIGFS_ATTR(nvmet_host_, dhchap_dhgroup); |
2104 | |
2105 | static struct configfs_attribute *nvmet_host_attrs[] = { |
2106 | &nvmet_host_attr_dhchap_key, |
2107 | &nvmet_host_attr_dhchap_ctrl_key, |
2108 | &nvmet_host_attr_dhchap_hash, |
2109 | &nvmet_host_attr_dhchap_dhgroup, |
2110 | NULL, |
2111 | }; |
2112 | #endif /* CONFIG_NVME_TARGET_AUTH */ |
2113 | |
2114 | static void nvmet_host_release(struct config_item *item) |
2115 | { |
2116 | struct nvmet_host *host = to_host(item); |
2117 | |
2118 | #ifdef CONFIG_NVME_TARGET_AUTH |
2119 | kfree(objp: host->dhchap_secret); |
2120 | kfree(objp: host->dhchap_ctrl_secret); |
2121 | #endif |
2122 | kfree(objp: host); |
2123 | } |
2124 | |
2125 | static struct configfs_item_operations nvmet_host_item_ops = { |
2126 | .release = nvmet_host_release, |
2127 | }; |
2128 | |
2129 | static const struct config_item_type nvmet_host_type = { |
2130 | .ct_item_ops = &nvmet_host_item_ops, |
2131 | #ifdef CONFIG_NVME_TARGET_AUTH |
2132 | .ct_attrs = nvmet_host_attrs, |
2133 | #endif |
2134 | .ct_owner = THIS_MODULE, |
2135 | }; |
2136 | |
2137 | static struct config_group *nvmet_hosts_make_group(struct config_group *group, |
2138 | const char *name) |
2139 | { |
2140 | struct nvmet_host *host; |
2141 | |
2142 | host = kzalloc(size: sizeof(*host), GFP_KERNEL); |
2143 | if (!host) |
2144 | return ERR_PTR(error: -ENOMEM); |
2145 | |
2146 | #ifdef CONFIG_NVME_TARGET_AUTH |
2147 | /* Default to SHA256 */ |
2148 | host->dhchap_hash_id = NVME_AUTH_HASH_SHA256; |
2149 | #endif |
2150 | |
2151 | config_group_init_type_name(group: &host->group, name, type: &nvmet_host_type); |
2152 | |
2153 | return &host->group; |
2154 | } |
2155 | |
2156 | static struct configfs_group_operations nvmet_hosts_group_ops = { |
2157 | .make_group = nvmet_hosts_make_group, |
2158 | }; |
2159 | |
2160 | static const struct config_item_type nvmet_hosts_type = { |
2161 | .ct_group_ops = &nvmet_hosts_group_ops, |
2162 | .ct_owner = THIS_MODULE, |
2163 | }; |
2164 | |
2165 | static struct config_group nvmet_hosts_group; |
2166 | |
2167 | static ssize_t nvmet_root_discovery_nqn_show(struct config_item *item, |
2168 | char *page) |
2169 | { |
2170 | return snprintf(buf: page, PAGE_SIZE, fmt: "%s\n" , nvmet_disc_subsys->subsysnqn); |
2171 | } |
2172 | |
2173 | static ssize_t nvmet_root_discovery_nqn_store(struct config_item *item, |
2174 | const char *page, size_t count) |
2175 | { |
2176 | struct list_head *entry; |
2177 | size_t len; |
2178 | |
2179 | len = strcspn(page, "\n" ); |
2180 | if (!len || len > NVMF_NQN_FIELD_LEN - 1) |
2181 | return -EINVAL; |
2182 | |
2183 | down_write(sem: &nvmet_config_sem); |
2184 | list_for_each(entry, &nvmet_subsystems_group.cg_children) { |
2185 | struct config_item *item = |
2186 | container_of(entry, struct config_item, ci_entry); |
2187 | |
2188 | if (!strncmp(config_item_name(item), page, len)) { |
2189 | pr_err("duplicate NQN %s\n" , config_item_name(item)); |
2190 | up_write(sem: &nvmet_config_sem); |
2191 | return -EINVAL; |
2192 | } |
2193 | } |
2194 | memset(nvmet_disc_subsys->subsysnqn, 0, NVMF_NQN_FIELD_LEN); |
2195 | memcpy(nvmet_disc_subsys->subsysnqn, page, len); |
2196 | up_write(sem: &nvmet_config_sem); |
2197 | |
2198 | return len; |
2199 | } |
2200 | |
2201 | CONFIGFS_ATTR(nvmet_root_, discovery_nqn); |
2202 | |
2203 | static struct configfs_attribute *nvmet_root_attrs[] = { |
2204 | &nvmet_root_attr_discovery_nqn, |
2205 | NULL, |
2206 | }; |
2207 | |
2208 | static const struct config_item_type nvmet_root_type = { |
2209 | .ct_attrs = nvmet_root_attrs, |
2210 | .ct_owner = THIS_MODULE, |
2211 | }; |
2212 | |
2213 | static struct configfs_subsystem nvmet_configfs_subsystem = { |
2214 | .su_group = { |
2215 | .cg_item = { |
2216 | .ci_namebuf = "nvmet" , |
2217 | .ci_type = &nvmet_root_type, |
2218 | }, |
2219 | }, |
2220 | }; |
2221 | |
2222 | int __init nvmet_init_configfs(void) |
2223 | { |
2224 | int ret; |
2225 | |
2226 | config_group_init(group: &nvmet_configfs_subsystem.su_group); |
2227 | mutex_init(&nvmet_configfs_subsystem.su_mutex); |
2228 | |
2229 | config_group_init_type_name(group: &nvmet_subsystems_group, |
2230 | name: "subsystems" , type: &nvmet_subsystems_type); |
2231 | configfs_add_default_group(new_group: &nvmet_subsystems_group, |
2232 | group: &nvmet_configfs_subsystem.su_group); |
2233 | |
2234 | config_group_init_type_name(group: &nvmet_ports_group, |
2235 | name: "ports" , type: &nvmet_ports_type); |
2236 | configfs_add_default_group(new_group: &nvmet_ports_group, |
2237 | group: &nvmet_configfs_subsystem.su_group); |
2238 | |
2239 | config_group_init_type_name(group: &nvmet_hosts_group, |
2240 | name: "hosts" , type: &nvmet_hosts_type); |
2241 | configfs_add_default_group(new_group: &nvmet_hosts_group, |
2242 | group: &nvmet_configfs_subsystem.su_group); |
2243 | |
2244 | ret = configfs_register_subsystem(subsys: &nvmet_configfs_subsystem); |
2245 | if (ret) { |
2246 | pr_err("configfs_register_subsystem: %d\n" , ret); |
2247 | return ret; |
2248 | } |
2249 | |
2250 | return 0; |
2251 | } |
2252 | |
2253 | void __exit nvmet_exit_configfs(void) |
2254 | { |
2255 | configfs_unregister_subsystem(subsys: &nvmet_configfs_subsystem); |
2256 | } |
2257 | |