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942e21c0 MG |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Sysfs interface for the NVMe core driver. | |
4 | * | |
5 | * Copyright (c) 2011-2014, Intel Corporation. | |
6 | */ | |
7 | ||
8 | #include <linux/nvme-auth.h> | |
9 | ||
10 | #include "nvme.h" | |
11 | #include "fabrics.h" | |
12 | ||
13 | static ssize_t nvme_sysfs_reset(struct device *dev, | |
14 | struct device_attribute *attr, const char *buf, | |
15 | size_t count) | |
16 | { | |
17 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
18 | int ret; | |
19 | ||
20 | ret = nvme_reset_ctrl_sync(ctrl); | |
21 | if (ret < 0) | |
22 | return ret; | |
23 | return count; | |
24 | } | |
25 | static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset); | |
26 | ||
27 | static ssize_t nvme_sysfs_rescan(struct device *dev, | |
28 | struct device_attribute *attr, const char *buf, | |
29 | size_t count) | |
30 | { | |
31 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
32 | ||
33 | nvme_queue_scan(ctrl); | |
34 | return count; | |
35 | } | |
36 | static DEVICE_ATTR(rescan_controller, S_IWUSR, NULL, nvme_sysfs_rescan); | |
37 | ||
9f079dda AA |
38 | static ssize_t nvme_adm_passthru_err_log_enabled_show(struct device *dev, |
39 | struct device_attribute *attr, char *buf) | |
40 | { | |
41 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
42 | ||
43 | return sysfs_emit(buf, | |
44 | ctrl->passthru_err_log_enabled ? "on\n" : "off\n"); | |
45 | } | |
46 | ||
47 | static ssize_t nvme_adm_passthru_err_log_enabled_store(struct device *dev, | |
48 | struct device_attribute *attr, const char *buf, size_t count) | |
49 | { | |
50 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
9f079dda | 51 | bool passthru_err_log_enabled; |
1f4137e8 | 52 | int err; |
9f079dda AA |
53 | |
54 | err = kstrtobool(buf, &passthru_err_log_enabled); | |
55 | if (err) | |
56 | return -EINVAL; | |
57 | ||
58 | ctrl->passthru_err_log_enabled = passthru_err_log_enabled; | |
59 | ||
60 | return count; | |
61 | } | |
62 | ||
1f4137e8 KB |
63 | static inline struct nvme_ns_head *dev_to_ns_head(struct device *dev) |
64 | { | |
65 | struct gendisk *disk = dev_to_disk(dev); | |
66 | ||
67 | if (nvme_disk_is_ns_head(disk)) | |
68 | return disk->private_data; | |
69 | return nvme_get_ns_from_dev(dev)->head; | |
70 | } | |
71 | ||
9f079dda AA |
72 | static ssize_t nvme_io_passthru_err_log_enabled_show(struct device *dev, |
73 | struct device_attribute *attr, char *buf) | |
74 | { | |
1f4137e8 | 75 | struct nvme_ns_head *head = dev_to_ns_head(dev); |
9f079dda | 76 | |
1f4137e8 | 77 | return sysfs_emit(buf, head->passthru_err_log_enabled ? "on\n" : "off\n"); |
9f079dda AA |
78 | } |
79 | ||
80 | static ssize_t nvme_io_passthru_err_log_enabled_store(struct device *dev, | |
81 | struct device_attribute *attr, const char *buf, size_t count) | |
82 | { | |
1f4137e8 | 83 | struct nvme_ns_head *head = dev_to_ns_head(dev); |
9f079dda | 84 | bool passthru_err_log_enabled; |
1f4137e8 | 85 | int err; |
9f079dda AA |
86 | |
87 | err = kstrtobool(buf, &passthru_err_log_enabled); | |
88 | if (err) | |
89 | return -EINVAL; | |
1f4137e8 | 90 | head->passthru_err_log_enabled = passthru_err_log_enabled; |
9f079dda AA |
91 | |
92 | return count; | |
93 | } | |
94 | ||
95 | static struct device_attribute dev_attr_adm_passthru_err_log_enabled = \ | |
96 | __ATTR(passthru_err_log_enabled, S_IRUGO | S_IWUSR, \ | |
97 | nvme_adm_passthru_err_log_enabled_show, nvme_adm_passthru_err_log_enabled_store); | |
98 | ||
99 | static struct device_attribute dev_attr_io_passthru_err_log_enabled = \ | |
100 | __ATTR(passthru_err_log_enabled, S_IRUGO | S_IWUSR, \ | |
101 | nvme_io_passthru_err_log_enabled_show, nvme_io_passthru_err_log_enabled_store); | |
102 | ||
942e21c0 MG |
103 | static ssize_t wwid_show(struct device *dev, struct device_attribute *attr, |
104 | char *buf) | |
105 | { | |
106 | struct nvme_ns_head *head = dev_to_ns_head(dev); | |
107 | struct nvme_ns_ids *ids = &head->ids; | |
108 | struct nvme_subsystem *subsys = head->subsys; | |
109 | int serial_len = sizeof(subsys->serial); | |
110 | int model_len = sizeof(subsys->model); | |
111 | ||
112 | if (!uuid_is_null(&ids->uuid)) | |
113 | return sysfs_emit(buf, "uuid.%pU\n", &ids->uuid); | |
114 | ||
115 | if (memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) | |
116 | return sysfs_emit(buf, "eui.%16phN\n", ids->nguid); | |
117 | ||
118 | if (memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) | |
119 | return sysfs_emit(buf, "eui.%8phN\n", ids->eui64); | |
120 | ||
121 | while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' || | |
122 | subsys->serial[serial_len - 1] == '\0')) | |
123 | serial_len--; | |
124 | while (model_len > 0 && (subsys->model[model_len - 1] == ' ' || | |
125 | subsys->model[model_len - 1] == '\0')) | |
126 | model_len--; | |
127 | ||
128 | return sysfs_emit(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id, | |
129 | serial_len, subsys->serial, model_len, subsys->model, | |
130 | head->ns_id); | |
131 | } | |
132 | static DEVICE_ATTR_RO(wwid); | |
133 | ||
134 | static ssize_t nguid_show(struct device *dev, struct device_attribute *attr, | |
135 | char *buf) | |
136 | { | |
137 | return sysfs_emit(buf, "%pU\n", dev_to_ns_head(dev)->ids.nguid); | |
138 | } | |
139 | static DEVICE_ATTR_RO(nguid); | |
140 | ||
141 | static ssize_t uuid_show(struct device *dev, struct device_attribute *attr, | |
142 | char *buf) | |
143 | { | |
144 | struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; | |
145 | ||
146 | /* For backward compatibility expose the NGUID to userspace if | |
147 | * we have no UUID set | |
148 | */ | |
149 | if (uuid_is_null(&ids->uuid)) { | |
b718ae83 | 150 | dev_warn_once(dev, |
942e21c0 MG |
151 | "No UUID available providing old NGUID\n"); |
152 | return sysfs_emit(buf, "%pU\n", ids->nguid); | |
153 | } | |
154 | return sysfs_emit(buf, "%pU\n", &ids->uuid); | |
155 | } | |
156 | static DEVICE_ATTR_RO(uuid); | |
157 | ||
158 | static ssize_t eui_show(struct device *dev, struct device_attribute *attr, | |
159 | char *buf) | |
160 | { | |
161 | return sysfs_emit(buf, "%8ph\n", dev_to_ns_head(dev)->ids.eui64); | |
162 | } | |
163 | static DEVICE_ATTR_RO(eui); | |
164 | ||
165 | static ssize_t nsid_show(struct device *dev, struct device_attribute *attr, | |
166 | char *buf) | |
167 | { | |
168 | return sysfs_emit(buf, "%d\n", dev_to_ns_head(dev)->ns_id); | |
169 | } | |
170 | static DEVICE_ATTR_RO(nsid); | |
171 | ||
a1a825ab DW |
172 | static ssize_t csi_show(struct device *dev, struct device_attribute *attr, |
173 | char *buf) | |
174 | { | |
175 | return sysfs_emit(buf, "%u\n", dev_to_ns_head(dev)->ids.csi); | |
176 | } | |
177 | static DEVICE_ATTR_RO(csi); | |
178 | ||
179 | static ssize_t metadata_bytes_show(struct device *dev, | |
180 | struct device_attribute *attr, char *buf) | |
181 | { | |
182 | return sysfs_emit(buf, "%u\n", dev_to_ns_head(dev)->ms); | |
183 | } | |
184 | static DEVICE_ATTR_RO(metadata_bytes); | |
185 | ||
186 | static int ns_head_update_nuse(struct nvme_ns_head *head) | |
187 | { | |
188 | struct nvme_id_ns *id; | |
189 | struct nvme_ns *ns; | |
190 | int srcu_idx, ret = -EWOULDBLOCK; | |
191 | ||
192 | /* Avoid issuing commands too often by rate limiting the update */ | |
193 | if (!__ratelimit(&head->rs_nuse)) | |
194 | return 0; | |
195 | ||
196 | srcu_idx = srcu_read_lock(&head->srcu); | |
197 | ns = nvme_find_path(head); | |
198 | if (!ns) | |
199 | goto out_unlock; | |
200 | ||
201 | ret = nvme_identify_ns(ns->ctrl, head->ns_id, &id); | |
202 | if (ret) | |
203 | goto out_unlock; | |
204 | ||
205 | head->nuse = le64_to_cpu(id->nuse); | |
206 | kfree(id); | |
207 | ||
208 | out_unlock: | |
209 | srcu_read_unlock(&head->srcu, srcu_idx); | |
210 | return ret; | |
211 | } | |
212 | ||
213 | static int ns_update_nuse(struct nvme_ns *ns) | |
214 | { | |
215 | struct nvme_id_ns *id; | |
216 | int ret; | |
217 | ||
218 | /* Avoid issuing commands too often by rate limiting the update. */ | |
219 | if (!__ratelimit(&ns->head->rs_nuse)) | |
220 | return 0; | |
221 | ||
222 | ret = nvme_identify_ns(ns->ctrl, ns->head->ns_id, &id); | |
223 | if (ret) | |
224 | goto out_free_id; | |
225 | ||
226 | ns->head->nuse = le64_to_cpu(id->nuse); | |
227 | ||
228 | out_free_id: | |
229 | kfree(id); | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
234 | static ssize_t nuse_show(struct device *dev, struct device_attribute *attr, | |
235 | char *buf) | |
236 | { | |
237 | struct nvme_ns_head *head = dev_to_ns_head(dev); | |
238 | struct gendisk *disk = dev_to_disk(dev); | |
239 | struct block_device *bdev = disk->part0; | |
240 | int ret; | |
241 | ||
242 | if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && | |
243 | bdev->bd_disk->fops == &nvme_ns_head_ops) | |
244 | ret = ns_head_update_nuse(head); | |
245 | else | |
246 | ret = ns_update_nuse(bdev->bd_disk->private_data); | |
247 | if (ret) | |
248 | return ret; | |
249 | ||
250 | return sysfs_emit(buf, "%llu\n", head->nuse); | |
251 | } | |
252 | static DEVICE_ATTR_RO(nuse); | |
253 | ||
83ac678e | 254 | static struct attribute *nvme_ns_attrs[] = { |
942e21c0 MG |
255 | &dev_attr_wwid.attr, |
256 | &dev_attr_uuid.attr, | |
257 | &dev_attr_nguid.attr, | |
258 | &dev_attr_eui.attr, | |
a1a825ab | 259 | &dev_attr_csi.attr, |
942e21c0 | 260 | &dev_attr_nsid.attr, |
a1a825ab DW |
261 | &dev_attr_metadata_bytes.attr, |
262 | &dev_attr_nuse.attr, | |
942e21c0 MG |
263 | #ifdef CONFIG_NVME_MULTIPATH |
264 | &dev_attr_ana_grpid.attr, | |
265 | &dev_attr_ana_state.attr, | |
266 | #endif | |
9f079dda | 267 | &dev_attr_io_passthru_err_log_enabled.attr, |
942e21c0 MG |
268 | NULL, |
269 | }; | |
270 | ||
83ac678e | 271 | static umode_t nvme_ns_attrs_are_visible(struct kobject *kobj, |
942e21c0 MG |
272 | struct attribute *a, int n) |
273 | { | |
274 | struct device *dev = container_of(kobj, struct device, kobj); | |
275 | struct nvme_ns_ids *ids = &dev_to_ns_head(dev)->ids; | |
276 | ||
277 | if (a == &dev_attr_uuid.attr) { | |
278 | if (uuid_is_null(&ids->uuid) && | |
279 | !memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) | |
280 | return 0; | |
281 | } | |
282 | if (a == &dev_attr_nguid.attr) { | |
283 | if (!memchr_inv(ids->nguid, 0, sizeof(ids->nguid))) | |
284 | return 0; | |
285 | } | |
286 | if (a == &dev_attr_eui.attr) { | |
287 | if (!memchr_inv(ids->eui64, 0, sizeof(ids->eui64))) | |
288 | return 0; | |
289 | } | |
290 | #ifdef CONFIG_NVME_MULTIPATH | |
291 | if (a == &dev_attr_ana_grpid.attr || a == &dev_attr_ana_state.attr) { | |
bafd5909 GL |
292 | /* per-path attr */ |
293 | if (nvme_disk_is_ns_head(dev_to_disk(dev))) | |
942e21c0 MG |
294 | return 0; |
295 | if (!nvme_ctrl_use_ana(nvme_get_ns_from_dev(dev)->ctrl)) | |
296 | return 0; | |
297 | } | |
298 | #endif | |
299 | return a->mode; | |
300 | } | |
301 | ||
83ac678e DW |
302 | static const struct attribute_group nvme_ns_attr_group = { |
303 | .attrs = nvme_ns_attrs, | |
304 | .is_visible = nvme_ns_attrs_are_visible, | |
942e21c0 MG |
305 | }; |
306 | ||
83ac678e DW |
307 | const struct attribute_group *nvme_ns_attr_groups[] = { |
308 | &nvme_ns_attr_group, | |
942e21c0 MG |
309 | NULL, |
310 | }; | |
311 | ||
312 | #define nvme_show_str_function(field) \ | |
313 | static ssize_t field##_show(struct device *dev, \ | |
314 | struct device_attribute *attr, char *buf) \ | |
315 | { \ | |
316 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
317 | return sysfs_emit(buf, "%.*s\n", \ | |
318 | (int)sizeof(ctrl->subsys->field), ctrl->subsys->field); \ | |
319 | } \ | |
320 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
321 | ||
322 | nvme_show_str_function(model); | |
323 | nvme_show_str_function(serial); | |
324 | nvme_show_str_function(firmware_rev); | |
325 | ||
326 | #define nvme_show_int_function(field) \ | |
327 | static ssize_t field##_show(struct device *dev, \ | |
328 | struct device_attribute *attr, char *buf) \ | |
329 | { \ | |
330 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \ | |
331 | return sysfs_emit(buf, "%d\n", ctrl->field); \ | |
332 | } \ | |
333 | static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL); | |
334 | ||
335 | nvme_show_int_function(cntlid); | |
336 | nvme_show_int_function(numa_node); | |
337 | nvme_show_int_function(queue_count); | |
338 | nvme_show_int_function(sqsize); | |
339 | nvme_show_int_function(kato); | |
340 | ||
341 | static ssize_t nvme_sysfs_delete(struct device *dev, | |
342 | struct device_attribute *attr, const char *buf, | |
343 | size_t count) | |
344 | { | |
345 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
346 | ||
1c606f7f KB |
347 | if (!test_bit(NVME_CTRL_STARTED_ONCE, &ctrl->flags)) |
348 | return -EBUSY; | |
349 | ||
942e21c0 MG |
350 | if (device_remove_file_self(dev, attr)) |
351 | nvme_delete_ctrl_sync(ctrl); | |
352 | return count; | |
353 | } | |
354 | static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete); | |
355 | ||
356 | static ssize_t nvme_sysfs_show_transport(struct device *dev, | |
357 | struct device_attribute *attr, | |
358 | char *buf) | |
359 | { | |
360 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
361 | ||
362 | return sysfs_emit(buf, "%s\n", ctrl->ops->name); | |
363 | } | |
364 | static DEVICE_ATTR(transport, S_IRUGO, nvme_sysfs_show_transport, NULL); | |
365 | ||
366 | static ssize_t nvme_sysfs_show_state(struct device *dev, | |
367 | struct device_attribute *attr, | |
368 | char *buf) | |
369 | { | |
370 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
6d3c7fb1 | 371 | unsigned state = (unsigned)nvme_ctrl_state(ctrl); |
942e21c0 MG |
372 | static const char *const state_name[] = { |
373 | [NVME_CTRL_NEW] = "new", | |
374 | [NVME_CTRL_LIVE] = "live", | |
375 | [NVME_CTRL_RESETTING] = "resetting", | |
376 | [NVME_CTRL_CONNECTING] = "connecting", | |
377 | [NVME_CTRL_DELETING] = "deleting", | |
378 | [NVME_CTRL_DELETING_NOIO]= "deleting (no IO)", | |
379 | [NVME_CTRL_DEAD] = "dead", | |
380 | }; | |
381 | ||
6d3c7fb1 KB |
382 | if (state < ARRAY_SIZE(state_name) && state_name[state]) |
383 | return sysfs_emit(buf, "%s\n", state_name[state]); | |
942e21c0 MG |
384 | |
385 | return sysfs_emit(buf, "unknown state\n"); | |
386 | } | |
387 | ||
388 | static DEVICE_ATTR(state, S_IRUGO, nvme_sysfs_show_state, NULL); | |
389 | ||
390 | static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev, | |
391 | struct device_attribute *attr, | |
392 | char *buf) | |
393 | { | |
394 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
395 | ||
396 | return sysfs_emit(buf, "%s\n", ctrl->subsys->subnqn); | |
397 | } | |
398 | static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL); | |
399 | ||
400 | static ssize_t nvme_sysfs_show_hostnqn(struct device *dev, | |
401 | struct device_attribute *attr, | |
402 | char *buf) | |
403 | { | |
404 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
405 | ||
406 | return sysfs_emit(buf, "%s\n", ctrl->opts->host->nqn); | |
407 | } | |
408 | static DEVICE_ATTR(hostnqn, S_IRUGO, nvme_sysfs_show_hostnqn, NULL); | |
409 | ||
410 | static ssize_t nvme_sysfs_show_hostid(struct device *dev, | |
411 | struct device_attribute *attr, | |
412 | char *buf) | |
413 | { | |
414 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
415 | ||
416 | return sysfs_emit(buf, "%pU\n", &ctrl->opts->host->id); | |
417 | } | |
418 | static DEVICE_ATTR(hostid, S_IRUGO, nvme_sysfs_show_hostid, NULL); | |
419 | ||
420 | static ssize_t nvme_sysfs_show_address(struct device *dev, | |
421 | struct device_attribute *attr, | |
422 | char *buf) | |
423 | { | |
424 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
425 | ||
426 | return ctrl->ops->get_address(ctrl, buf, PAGE_SIZE); | |
427 | } | |
428 | static DEVICE_ATTR(address, S_IRUGO, nvme_sysfs_show_address, NULL); | |
429 | ||
430 | static ssize_t nvme_ctrl_loss_tmo_show(struct device *dev, | |
431 | struct device_attribute *attr, char *buf) | |
432 | { | |
433 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
434 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
435 | ||
436 | if (ctrl->opts->max_reconnects == -1) | |
437 | return sysfs_emit(buf, "off\n"); | |
438 | return sysfs_emit(buf, "%d\n", | |
439 | opts->max_reconnects * opts->reconnect_delay); | |
440 | } | |
441 | ||
442 | static ssize_t nvme_ctrl_loss_tmo_store(struct device *dev, | |
443 | struct device_attribute *attr, const char *buf, size_t count) | |
444 | { | |
445 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
446 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
447 | int ctrl_loss_tmo, err; | |
448 | ||
449 | err = kstrtoint(buf, 10, &ctrl_loss_tmo); | |
450 | if (err) | |
451 | return -EINVAL; | |
452 | ||
453 | if (ctrl_loss_tmo < 0) | |
454 | opts->max_reconnects = -1; | |
455 | else | |
456 | opts->max_reconnects = DIV_ROUND_UP(ctrl_loss_tmo, | |
457 | opts->reconnect_delay); | |
458 | return count; | |
459 | } | |
460 | static DEVICE_ATTR(ctrl_loss_tmo, S_IRUGO | S_IWUSR, | |
461 | nvme_ctrl_loss_tmo_show, nvme_ctrl_loss_tmo_store); | |
462 | ||
463 | static ssize_t nvme_ctrl_reconnect_delay_show(struct device *dev, | |
464 | struct device_attribute *attr, char *buf) | |
465 | { | |
466 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
467 | ||
468 | if (ctrl->opts->reconnect_delay == -1) | |
469 | return sysfs_emit(buf, "off\n"); | |
470 | return sysfs_emit(buf, "%d\n", ctrl->opts->reconnect_delay); | |
471 | } | |
472 | ||
473 | static ssize_t nvme_ctrl_reconnect_delay_store(struct device *dev, | |
474 | struct device_attribute *attr, const char *buf, size_t count) | |
475 | { | |
476 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
477 | unsigned int v; | |
478 | int err; | |
479 | ||
480 | err = kstrtou32(buf, 10, &v); | |
481 | if (err) | |
482 | return err; | |
483 | ||
484 | ctrl->opts->reconnect_delay = v; | |
485 | return count; | |
486 | } | |
487 | static DEVICE_ATTR(reconnect_delay, S_IRUGO | S_IWUSR, | |
488 | nvme_ctrl_reconnect_delay_show, nvme_ctrl_reconnect_delay_store); | |
489 | ||
490 | static ssize_t nvme_ctrl_fast_io_fail_tmo_show(struct device *dev, | |
491 | struct device_attribute *attr, char *buf) | |
492 | { | |
493 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
494 | ||
495 | if (ctrl->opts->fast_io_fail_tmo == -1) | |
496 | return sysfs_emit(buf, "off\n"); | |
497 | return sysfs_emit(buf, "%d\n", ctrl->opts->fast_io_fail_tmo); | |
498 | } | |
499 | ||
500 | static ssize_t nvme_ctrl_fast_io_fail_tmo_store(struct device *dev, | |
501 | struct device_attribute *attr, const char *buf, size_t count) | |
502 | { | |
503 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
504 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
505 | int fast_io_fail_tmo, err; | |
506 | ||
507 | err = kstrtoint(buf, 10, &fast_io_fail_tmo); | |
508 | if (err) | |
509 | return -EINVAL; | |
510 | ||
511 | if (fast_io_fail_tmo < 0) | |
512 | opts->fast_io_fail_tmo = -1; | |
513 | else | |
514 | opts->fast_io_fail_tmo = fast_io_fail_tmo; | |
515 | return count; | |
516 | } | |
517 | static DEVICE_ATTR(fast_io_fail_tmo, S_IRUGO | S_IWUSR, | |
518 | nvme_ctrl_fast_io_fail_tmo_show, nvme_ctrl_fast_io_fail_tmo_store); | |
519 | ||
520 | static ssize_t cntrltype_show(struct device *dev, | |
521 | struct device_attribute *attr, char *buf) | |
522 | { | |
523 | static const char * const type[] = { | |
524 | [NVME_CTRL_IO] = "io\n", | |
525 | [NVME_CTRL_DISC] = "discovery\n", | |
526 | [NVME_CTRL_ADMIN] = "admin\n", | |
527 | }; | |
528 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
529 | ||
530 | if (ctrl->cntrltype > NVME_CTRL_ADMIN || !type[ctrl->cntrltype]) | |
531 | return sysfs_emit(buf, "reserved\n"); | |
532 | ||
533 | return sysfs_emit(buf, type[ctrl->cntrltype]); | |
534 | } | |
535 | static DEVICE_ATTR_RO(cntrltype); | |
536 | ||
537 | static ssize_t dctype_show(struct device *dev, | |
538 | struct device_attribute *attr, char *buf) | |
539 | { | |
540 | static const char * const type[] = { | |
541 | [NVME_DCTYPE_NOT_REPORTED] = "none\n", | |
542 | [NVME_DCTYPE_DDC] = "ddc\n", | |
543 | [NVME_DCTYPE_CDC] = "cdc\n", | |
544 | }; | |
545 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
546 | ||
547 | if (ctrl->dctype > NVME_DCTYPE_CDC || !type[ctrl->dctype]) | |
548 | return sysfs_emit(buf, "reserved\n"); | |
549 | ||
550 | return sysfs_emit(buf, type[ctrl->dctype]); | |
551 | } | |
552 | static DEVICE_ATTR_RO(dctype); | |
553 | ||
d6800634 | 554 | #ifdef CONFIG_NVME_HOST_AUTH |
942e21c0 MG |
555 | static ssize_t nvme_ctrl_dhchap_secret_show(struct device *dev, |
556 | struct device_attribute *attr, char *buf) | |
557 | { | |
558 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
559 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
560 | ||
561 | if (!opts->dhchap_secret) | |
562 | return sysfs_emit(buf, "none\n"); | |
563 | return sysfs_emit(buf, "%s\n", opts->dhchap_secret); | |
564 | } | |
565 | ||
566 | static ssize_t nvme_ctrl_dhchap_secret_store(struct device *dev, | |
567 | struct device_attribute *attr, const char *buf, size_t count) | |
568 | { | |
569 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
570 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
571 | char *dhchap_secret; | |
572 | ||
573 | if (!ctrl->opts->dhchap_secret) | |
574 | return -EINVAL; | |
575 | if (count < 7) | |
576 | return -EINVAL; | |
577 | if (memcmp(buf, "DHHC-1:", 7)) | |
578 | return -EINVAL; | |
579 | ||
580 | dhchap_secret = kzalloc(count + 1, GFP_KERNEL); | |
581 | if (!dhchap_secret) | |
582 | return -ENOMEM; | |
583 | memcpy(dhchap_secret, buf, count); | |
584 | nvme_auth_stop(ctrl); | |
585 | if (strcmp(dhchap_secret, opts->dhchap_secret)) { | |
586 | struct nvme_dhchap_key *key, *host_key; | |
587 | int ret; | |
588 | ||
589 | ret = nvme_auth_generate_key(dhchap_secret, &key); | |
590 | if (ret) { | |
591 | kfree(dhchap_secret); | |
592 | return ret; | |
593 | } | |
594 | kfree(opts->dhchap_secret); | |
595 | opts->dhchap_secret = dhchap_secret; | |
596 | host_key = ctrl->host_key; | |
597 | mutex_lock(&ctrl->dhchap_auth_mutex); | |
598 | ctrl->host_key = key; | |
599 | mutex_unlock(&ctrl->dhchap_auth_mutex); | |
600 | nvme_auth_free_key(host_key); | |
601 | } else | |
602 | kfree(dhchap_secret); | |
603 | /* Start re-authentication */ | |
604 | dev_info(ctrl->device, "re-authenticating controller\n"); | |
605 | queue_work(nvme_wq, &ctrl->dhchap_auth_work); | |
606 | ||
607 | return count; | |
608 | } | |
609 | ||
610 | static DEVICE_ATTR(dhchap_secret, S_IRUGO | S_IWUSR, | |
611 | nvme_ctrl_dhchap_secret_show, nvme_ctrl_dhchap_secret_store); | |
612 | ||
613 | static ssize_t nvme_ctrl_dhchap_ctrl_secret_show(struct device *dev, | |
614 | struct device_attribute *attr, char *buf) | |
615 | { | |
616 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
617 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
618 | ||
619 | if (!opts->dhchap_ctrl_secret) | |
620 | return sysfs_emit(buf, "none\n"); | |
621 | return sysfs_emit(buf, "%s\n", opts->dhchap_ctrl_secret); | |
622 | } | |
623 | ||
624 | static ssize_t nvme_ctrl_dhchap_ctrl_secret_store(struct device *dev, | |
625 | struct device_attribute *attr, const char *buf, size_t count) | |
626 | { | |
627 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
628 | struct nvmf_ctrl_options *opts = ctrl->opts; | |
629 | char *dhchap_secret; | |
630 | ||
631 | if (!ctrl->opts->dhchap_ctrl_secret) | |
632 | return -EINVAL; | |
633 | if (count < 7) | |
634 | return -EINVAL; | |
635 | if (memcmp(buf, "DHHC-1:", 7)) | |
636 | return -EINVAL; | |
637 | ||
638 | dhchap_secret = kzalloc(count + 1, GFP_KERNEL); | |
639 | if (!dhchap_secret) | |
640 | return -ENOMEM; | |
641 | memcpy(dhchap_secret, buf, count); | |
642 | nvme_auth_stop(ctrl); | |
643 | if (strcmp(dhchap_secret, opts->dhchap_ctrl_secret)) { | |
644 | struct nvme_dhchap_key *key, *ctrl_key; | |
645 | int ret; | |
646 | ||
647 | ret = nvme_auth_generate_key(dhchap_secret, &key); | |
648 | if (ret) { | |
649 | kfree(dhchap_secret); | |
650 | return ret; | |
651 | } | |
652 | kfree(opts->dhchap_ctrl_secret); | |
653 | opts->dhchap_ctrl_secret = dhchap_secret; | |
654 | ctrl_key = ctrl->ctrl_key; | |
655 | mutex_lock(&ctrl->dhchap_auth_mutex); | |
656 | ctrl->ctrl_key = key; | |
657 | mutex_unlock(&ctrl->dhchap_auth_mutex); | |
658 | nvme_auth_free_key(ctrl_key); | |
659 | } else | |
660 | kfree(dhchap_secret); | |
661 | /* Start re-authentication */ | |
662 | dev_info(ctrl->device, "re-authenticating controller\n"); | |
663 | queue_work(nvme_wq, &ctrl->dhchap_auth_work); | |
664 | ||
665 | return count; | |
666 | } | |
667 | ||
668 | static DEVICE_ATTR(dhchap_ctrl_secret, S_IRUGO | S_IWUSR, | |
669 | nvme_ctrl_dhchap_ctrl_secret_show, nvme_ctrl_dhchap_ctrl_secret_store); | |
670 | #endif | |
671 | ||
be8e82ca HR |
672 | #ifdef CONFIG_NVME_TCP_TLS |
673 | static ssize_t tls_key_show(struct device *dev, | |
674 | struct device_attribute *attr, char *buf) | |
675 | { | |
676 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
677 | ||
678 | if (!ctrl->tls_key) | |
679 | return 0; | |
680 | return sysfs_emit(buf, "%08x", key_serial(ctrl->tls_key)); | |
681 | } | |
682 | static DEVICE_ATTR_RO(tls_key); | |
683 | #endif | |
684 | ||
942e21c0 MG |
685 | static struct attribute *nvme_dev_attrs[] = { |
686 | &dev_attr_reset_controller.attr, | |
687 | &dev_attr_rescan_controller.attr, | |
688 | &dev_attr_model.attr, | |
689 | &dev_attr_serial.attr, | |
690 | &dev_attr_firmware_rev.attr, | |
691 | &dev_attr_cntlid.attr, | |
692 | &dev_attr_delete_controller.attr, | |
693 | &dev_attr_transport.attr, | |
694 | &dev_attr_subsysnqn.attr, | |
695 | &dev_attr_address.attr, | |
696 | &dev_attr_state.attr, | |
697 | &dev_attr_numa_node.attr, | |
698 | &dev_attr_queue_count.attr, | |
699 | &dev_attr_sqsize.attr, | |
700 | &dev_attr_hostnqn.attr, | |
701 | &dev_attr_hostid.attr, | |
702 | &dev_attr_ctrl_loss_tmo.attr, | |
703 | &dev_attr_reconnect_delay.attr, | |
704 | &dev_attr_fast_io_fail_tmo.attr, | |
705 | &dev_attr_kato.attr, | |
706 | &dev_attr_cntrltype.attr, | |
707 | &dev_attr_dctype.attr, | |
d6800634 | 708 | #ifdef CONFIG_NVME_HOST_AUTH |
942e21c0 MG |
709 | &dev_attr_dhchap_secret.attr, |
710 | &dev_attr_dhchap_ctrl_secret.attr, | |
be8e82ca HR |
711 | #endif |
712 | #ifdef CONFIG_NVME_TCP_TLS | |
713 | &dev_attr_tls_key.attr, | |
942e21c0 | 714 | #endif |
9f079dda | 715 | &dev_attr_adm_passthru_err_log_enabled.attr, |
942e21c0 MG |
716 | NULL |
717 | }; | |
718 | ||
719 | static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, | |
720 | struct attribute *a, int n) | |
721 | { | |
722 | struct device *dev = container_of(kobj, struct device, kobj); | |
723 | struct nvme_ctrl *ctrl = dev_get_drvdata(dev); | |
724 | ||
725 | if (a == &dev_attr_delete_controller.attr && !ctrl->ops->delete_ctrl) | |
726 | return 0; | |
727 | if (a == &dev_attr_address.attr && !ctrl->ops->get_address) | |
728 | return 0; | |
729 | if (a == &dev_attr_hostnqn.attr && !ctrl->opts) | |
730 | return 0; | |
731 | if (a == &dev_attr_hostid.attr && !ctrl->opts) | |
732 | return 0; | |
733 | if (a == &dev_attr_ctrl_loss_tmo.attr && !ctrl->opts) | |
734 | return 0; | |
735 | if (a == &dev_attr_reconnect_delay.attr && !ctrl->opts) | |
736 | return 0; | |
737 | if (a == &dev_attr_fast_io_fail_tmo.attr && !ctrl->opts) | |
738 | return 0; | |
d6800634 | 739 | #ifdef CONFIG_NVME_HOST_AUTH |
942e21c0 MG |
740 | if (a == &dev_attr_dhchap_secret.attr && !ctrl->opts) |
741 | return 0; | |
742 | if (a == &dev_attr_dhchap_ctrl_secret.attr && !ctrl->opts) | |
743 | return 0; | |
744 | #endif | |
be8e82ca HR |
745 | #ifdef CONFIG_NVME_TCP_TLS |
746 | if (a == &dev_attr_tls_key.attr && | |
747 | (!ctrl->opts || strcmp(ctrl->opts->transport, "tcp"))) | |
748 | return 0; | |
749 | #endif | |
942e21c0 MG |
750 | |
751 | return a->mode; | |
752 | } | |
753 | ||
754 | const struct attribute_group nvme_dev_attrs_group = { | |
755 | .attrs = nvme_dev_attrs, | |
756 | .is_visible = nvme_dev_attrs_are_visible, | |
757 | }; | |
758 | EXPORT_SYMBOL_GPL(nvme_dev_attrs_group); | |
759 | ||
760 | const struct attribute_group *nvme_dev_attr_groups[] = { | |
761 | &nvme_dev_attrs_group, | |
762 | NULL, | |
763 | }; | |
764 | ||
765 | #define SUBSYS_ATTR_RO(_name, _mode, _show) \ | |
766 | struct device_attribute subsys_attr_##_name = \ | |
767 | __ATTR(_name, _mode, _show, NULL) | |
768 | ||
769 | static ssize_t nvme_subsys_show_nqn(struct device *dev, | |
770 | struct device_attribute *attr, | |
771 | char *buf) | |
772 | { | |
773 | struct nvme_subsystem *subsys = | |
774 | container_of(dev, struct nvme_subsystem, dev); | |
775 | ||
776 | return sysfs_emit(buf, "%s\n", subsys->subnqn); | |
777 | } | |
778 | static SUBSYS_ATTR_RO(subsysnqn, S_IRUGO, nvme_subsys_show_nqn); | |
779 | ||
780 | static ssize_t nvme_subsys_show_type(struct device *dev, | |
781 | struct device_attribute *attr, | |
782 | char *buf) | |
783 | { | |
784 | struct nvme_subsystem *subsys = | |
785 | container_of(dev, struct nvme_subsystem, dev); | |
786 | ||
787 | switch (subsys->subtype) { | |
788 | case NVME_NQN_DISC: | |
789 | return sysfs_emit(buf, "discovery\n"); | |
790 | case NVME_NQN_NVME: | |
791 | return sysfs_emit(buf, "nvm\n"); | |
792 | default: | |
793 | return sysfs_emit(buf, "reserved\n"); | |
794 | } | |
795 | } | |
796 | static SUBSYS_ATTR_RO(subsystype, S_IRUGO, nvme_subsys_show_type); | |
797 | ||
798 | #define nvme_subsys_show_str_function(field) \ | |
799 | static ssize_t subsys_##field##_show(struct device *dev, \ | |
800 | struct device_attribute *attr, char *buf) \ | |
801 | { \ | |
802 | struct nvme_subsystem *subsys = \ | |
803 | container_of(dev, struct nvme_subsystem, dev); \ | |
804 | return sysfs_emit(buf, "%.*s\n", \ | |
805 | (int)sizeof(subsys->field), subsys->field); \ | |
806 | } \ | |
807 | static SUBSYS_ATTR_RO(field, S_IRUGO, subsys_##field##_show); | |
808 | ||
809 | nvme_subsys_show_str_function(model); | |
810 | nvme_subsys_show_str_function(serial); | |
811 | nvme_subsys_show_str_function(firmware_rev); | |
812 | ||
813 | static struct attribute *nvme_subsys_attrs[] = { | |
814 | &subsys_attr_model.attr, | |
815 | &subsys_attr_serial.attr, | |
816 | &subsys_attr_firmware_rev.attr, | |
817 | &subsys_attr_subsysnqn.attr, | |
818 | &subsys_attr_subsystype.attr, | |
819 | #ifdef CONFIG_NVME_MULTIPATH | |
820 | &subsys_attr_iopolicy.attr, | |
821 | #endif | |
822 | NULL, | |
823 | }; | |
824 | ||
825 | static const struct attribute_group nvme_subsys_attrs_group = { | |
826 | .attrs = nvme_subsys_attrs, | |
827 | }; | |
828 | ||
829 | const struct attribute_group *nvme_subsys_attrs_groups[] = { | |
830 | &nvme_subsys_attrs_group, | |
831 | NULL, | |
832 | }; |