1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2024 Oxide Computer Company
14 */
15
16 /*
17 * This file deals with validating and issuing various log page requests to an
18 * NVMe target. This contains information about all spec-based log pages. The
19 * get log page command has added a number of fields that have evolved over
20 * time. We validate that we're only sending commands to a device that we expect
21 * it to have a chance of understanding. In general, we only allow through
22 * unknown log pages that correspond to vendor-specific commands.
23 *
24 * We have two different tables of information that we use to drive and validate
25 * things here:
26 *
27 * 1) We have a list of fields that exist which include minimum controller
28 * versions and related functionality validation routines that operate off of
29 * the nvme_t. While tihs list includes things like the CSI and LID, these are
30 * things that may only be specified when we have a non-standard log page.
31 *
32 * 2) We then have a table of log pages that are supported which list which
33 * fields we allow for the device. Not all of this can be static.
34 *
35 * This file has been designed to be shareable between both userland and the
36 * kernel since the logic that libnvme wants to use is quite similar.
37 */
38
39 #include "nvme_common.h"
40
41 #include <sys/sysmacros.h>
42 #ifdef _KERNEL
43 #include <sys/sunddi.h>
44 #include <sys/stdint.h>
45 #else
46 #include <stdio.h>
47 #include <inttypes.h>
48 #endif
49
50 static bool
nvme_log_field_valid_lsp(const nvme_field_info_t * field,const nvme_valid_ctrl_data_t * data,uint64_t lsp,char * msg,size_t msglen)51 nvme_log_field_valid_lsp(const nvme_field_info_t *field,
52 const nvme_valid_ctrl_data_t *data, uint64_t lsp, char *msg, size_t msglen)
53 {
54 uint64_t max;
55
56 if (nvme_field_atleast(data, &nvme_vers_2v0)) {
57 max = NVME_LOG_MAX_LSP_2v0;
58 } else {
59 max = NVME_LOG_MAX_LSP;
60 }
61
62 return (nvme_field_range_check(field, 0, max, msg, msglen, lsp));
63 }
64
65 static bool
nvme_log_field_supported_offset(const nvme_field_info_t * field,const nvme_valid_ctrl_data_t * data,char * msg,size_t msglen)66 nvme_log_field_supported_offset(const nvme_field_info_t *field,
67 const nvme_valid_ctrl_data_t *data, char *msg, size_t msglen)
68 {
69 if (data->vcd_id->id_lpa.lp_extsup != 0) {
70 return (true);
71 }
72
73 (void) snprintf(msg, msglen, "controller does not support field %s "
74 "(%s): missing extended data support in Log Page Attributes (LPA)",
75 field->nlfi_human, field->nlfi_spec);
76 return (false);
77 }
78
79 /*
80 * The offset is a full 64-bit byte value; however, it must be 4-byte aligned.
81 */
82 static bool
nvme_log_field_valid_offset(const nvme_field_info_t * field,const nvme_valid_ctrl_data_t * data,uint64_t size,char * msg,size_t msglen)83 nvme_log_field_valid_offset(const nvme_field_info_t *field,
84 const nvme_valid_ctrl_data_t *data, uint64_t size, char *msg, size_t msglen)
85 {
86 if ((size % NVME_DWORD_SIZE) != 0) {
87 (void) snprintf(msg, msglen, "%s (%s) value 0x%" PRIx64 " is "
88 "invalid: value must be %u-byte aligned", field->nlfi_human,
89 field->nlfi_spec, size, NVME_DWORD_SIZE);
90 return (false);
91 }
92
93 return (true);
94 }
95
96 static bool
nvme_log_field_valid_size(const nvme_field_info_t * field,const nvme_valid_ctrl_data_t * data,uint64_t size,char * msg,size_t msglen)97 nvme_log_field_valid_size(const nvme_field_info_t *field,
98 const nvme_valid_ctrl_data_t *data, uint64_t size, char *msg, size_t msglen)
99 {
100 uint64_t max = NVME_LOG_MAX_SIZE;
101
102 if (nvme_field_atleast(data, &nvme_vers_1v2) &&
103 data->vcd_id->id_lpa.lp_extsup != 0) {
104 max = NVME_LOG_MAX_SIZE_1v2;
105 }
106
107 /*
108 * The NVMe specification operates in terms of uint32_t (dword) units.
109 * Make sure that we are operating within that constraint.
110 */
111 if ((size % 4) != 0) {
112 (void) snprintf(msg, msglen, "%s (%s) value 0x%" PRIx64 " is "
113 "invalid: value must be 4-byte aligned", field->nlfi_human,
114 field->nlfi_spec, size);
115 return (false);
116 }
117
118 return (nvme_field_range_check(field, 4, max, msg, msglen, size));
119 }
120
121 const nvme_field_info_t nvme_log_fields[] = {
122 [NVME_LOG_REQ_FIELD_LID] = {
123 .nlfi_vers = &nvme_vers_1v0,
124 .nlfi_max_size = NVME_LOG_MAX_LID,
125 .nlfi_spec = "lid",
126 .nlfi_human = "log ID",
127 .nlfi_def_req = true,
128 .nlfi_def_allow = true
129 },
130 [NVME_LOG_REQ_FIELD_LSP] = {
131 .nlfi_vers = &nvme_vers_1v3,
132 .nlfi_valid = nvme_log_field_valid_lsp,
133 .nlfi_spec = "lsp",
134 .nlfi_human = "log specific field",
135 .nlfi_def_req = false,
136 .nlfi_def_allow = true
137 },
138 [NVME_LOG_REQ_FIELD_LSI] = {
139 .nlfi_vers = &nvme_vers_1v4,
140 .nlfi_max_size = NVME_LOG_MAX_LSI,
141 .nlfi_spec = "lsi",
142 .nlfi_human = "log specific ID",
143 .nlfi_def_req = false,
144 .nlfi_def_allow = true
145 },
146 [NVME_LOG_REQ_FIELD_SIZE] = {
147 .nlfi_vers = &nvme_vers_1v0,
148 .nlfi_valid = nvme_log_field_valid_size,
149 .nlfi_spec = "dptr/numd",
150 .nlfi_human = "output",
151 .nlfi_def_req = true,
152 .nlfi_def_allow = true
153 },
154 [NVME_LOG_REQ_FIELD_CSI] = {
155 .nlfi_vers = &nvme_vers_2v0,
156 /*
157 * This has the field's maximum range right now, though NVMe 2.0
158 * only defines a few values. Because the kernel only allows
159 * through known log pages, we don't really bother to check the
160 * condensed range and allow vendor-specific logs to go wild.
161 */
162 .nlfi_max_size = NVME_LOG_MAX_CSI,
163 .nlfi_spec = "csi",
164 .nlfi_human = "command set ID",
165 .nlfi_def_req = false,
166 .nlfi_def_allow = true
167 },
168 [NVME_LOG_REQ_FIELD_RAE] = {
169 .nlfi_vers = &nvme_vers_1v3,
170 .nlfi_max_size = NVME_LOG_MAX_RAE,
171 .nlfi_spec = "rae",
172 .nlfi_human = "retain asynchronous event",
173 .nlfi_def_req = false,
174 .nlfi_def_allow = true
175 },
176 [NVME_LOG_REQ_FIELD_OFFSET] = {
177 .nlfi_vers = &nvme_vers_1v2,
178 .nlfi_sup = nvme_log_field_supported_offset,
179 .nlfi_valid = nvme_log_field_valid_offset,
180 .nlfi_max_size = NVME_LOG_MAX_OFFSET,
181 .nlfi_spec = "lpo",
182 .nlfi_human = "log offset",
183 .nlfi_def_req = false,
184 .nlfi_def_allow = true
185 },
186 [NVME_LOG_REQ_FIELD_NSID] = {
187 .nlfi_vers = &nvme_vers_1v0,
188 .nlfi_valid = nvme_field_valid_nsid,
189 .nlfi_spec = "nsid",
190 .nlfi_human = "namespace ID",
191 .nlfi_def_req = false,
192 .nlfi_def_allow = true
193 }
194 };
195
196 size_t nvme_log_nfields = ARRAY_SIZE(nvme_log_fields);
197
198 static uint64_t
nvme_lpd_error_len(const nvme_valid_ctrl_data_t * data,const nvme_log_page_info_t * lpi)199 nvme_lpd_error_len(const nvme_valid_ctrl_data_t *data,
200 const nvme_log_page_info_t *lpi)
201 {
202 const uint64_t nents = data->vcd_id->id_elpe + 1;
203 const uint64_t logsz = nents * sizeof (nvme_error_log_entry_t);
204
205 return (logsz);
206 }
207
208 static nvme_log_disc_scope_t
nvme_lpd_health_scope(const nvme_valid_ctrl_data_t * data,const nvme_log_page_info_t * lpi)209 nvme_lpd_health_scope(const nvme_valid_ctrl_data_t *data,
210 const nvme_log_page_info_t *lpi)
211 {
212 nvme_log_disc_scope_t ret = NVME_LOG_SCOPE_CTRL;
213
214 if (nvme_field_atleast(data, &nvme_vers_1v0) &&
215 data->vcd_id->id_lpa.lp_smart != 0) {
216 ret |= NVME_LOG_SCOPE_NS;
217 }
218
219 return (ret);
220 }
221
222 static bool
nvme_lpd_changens_sup(const nvme_valid_ctrl_data_t * data,const nvme_log_page_info_t * lpi)223 nvme_lpd_changens_sup(const nvme_valid_ctrl_data_t *data,
224 const nvme_log_page_info_t *lpi)
225 {
226 return (nvme_field_atleast(data, &nvme_vers_1v2) &&
227 data->vcd_id->id_oaes.oaes_nsan != 0);
228 }
229
230 static bool
nvme_lpd_cmdeff_sup(const nvme_valid_ctrl_data_t * data,const nvme_log_page_info_t * lpi)231 nvme_lpd_cmdeff_sup(const nvme_valid_ctrl_data_t *data,
232 const nvme_log_page_info_t *lpi)
233 {
234 return (nvme_field_atleast(data, &nvme_vers_1v2) &&
235 data->vcd_id->id_lpa.lp_cmdeff != 0);
236 }
237
238 /*
239 * The short names here correspond to the well defined names in nvmeadm(8) and
240 * libnvme(3LIB) that users expect to be able to use. Please do not change them
241 * without accounting for aliases and backwards compatibility.
242 */
243 const nvme_log_page_info_t nvme_std_log_pages[] = { {
244 .nlpi_short = "suplog",
245 .nlpi_human = "Supported Log Pages",
246 .nlpi_lid = NVME_LOGPAGE_SUP,
247 .nlpi_csi = NVME_CSI_NVM,
248 .nlpi_vers = &nvme_vers_2v0,
249 .nlpi_kind = NVME_LOG_ID_MANDATORY,
250 .nlpi_source = NVME_LOG_DISC_S_SPEC,
251 .nlpi_scope = NVME_LOG_SCOPE_CTRL,
252 .nlpi_len = sizeof (nvme_suplog_log_t)
253 }, {
254 .nlpi_short = "error",
255 .nlpi_human = "Error information",
256 .nlpi_lid = NVME_LOGPAGE_ERROR,
257 .nlpi_csi = NVME_CSI_NVM,
258 .nlpi_vers = &nvme_vers_1v0,
259 .nlpi_kind = NVME_LOG_ID_MANDATORY,
260 .nlpi_source = NVME_LOG_DISC_S_SPEC,
261 .nlpi_disc = NVME_LOG_DISC_F_NEED_RAE,
262 .nlpi_scope = NVME_LOG_SCOPE_CTRL,
263 .nlpi_len_func = nvme_lpd_error_len
264 }, {
265 .nlpi_short = "health",
266 .nlpi_human = "SMART / Health information",
267 .nlpi_lid = NVME_LOGPAGE_HEALTH,
268 .nlpi_csi = NVME_CSI_NVM,
269 .nlpi_vers = &nvme_vers_1v0,
270 .nlpi_kind = NVME_LOG_ID_MANDATORY,
271 .nlpi_source = NVME_LOG_DISC_S_SPEC | NVME_LOG_DISC_S_ID_CTRL,
272 .nlpi_disc = NVME_LOG_DISC_F_NEED_RAE,
273 .nlpi_scope_func = nvme_lpd_health_scope,
274 .nlpi_len = sizeof (nvme_health_log_t)
275 }, {
276 .nlpi_short = "firmware",
277 .nlpi_human = "Firmware Slot Information",
278 .nlpi_lid = NVME_LOGPAGE_FWSLOT,
279 .nlpi_csi = NVME_CSI_NVM,
280 .nlpi_vers = &nvme_vers_1v0,
281 .nlpi_kind = NVME_LOG_ID_MANDATORY,
282 .nlpi_source = NVME_LOG_DISC_S_SPEC,
283 .nlpi_disc = 0,
284 .nlpi_scope = NVME_LOG_SCOPE_NVM,
285 .nlpi_len = sizeof (nvme_fwslot_log_t),
286 }, {
287 .nlpi_short = "changens",
288 .nlpi_human = "changed namespaces",
289 .nlpi_lid = NVME_LOGPAGE_NSCHANGE,
290 .nlpi_csi = NVME_CSI_NVM,
291 .nlpi_vers = &nvme_vers_1v2,
292 .nlpi_sup_func = nvme_lpd_changens_sup,
293 .nlpi_kind = NVME_LOG_ID_OPTIONAL,
294 .nlpi_source = NVME_LOG_DISC_S_ID_CTRL,
295 .nlpi_disc = NVME_LOG_DISC_F_NEED_RAE,
296 .nlpi_scope = NVME_LOG_SCOPE_CTRL,
297 .nlpi_len = sizeof (nvme_nschange_list_t)
298 }, {
299 .nlpi_short = "cmdeff",
300 .nlpi_human = "commands supported and effects",
301 .nlpi_lid = NVME_LOGPAGE_CMDSUP,
302 .nlpi_csi = NVME_CSI_NVM,
303 .nlpi_vers = &nvme_vers_1v2,
304 .nlpi_sup_func = nvme_lpd_cmdeff_sup,
305 .nlpi_kind = NVME_LOG_ID_OPTIONAL,
306 .nlpi_source = NVME_LOG_DISC_S_ID_CTRL,
307 .nlpi_scope = NVME_LOG_SCOPE_CTRL,
308 .nlpi_len = sizeof (nvme_cmdeff_log_t)
309 } };
310
311 size_t nvme_std_log_npages = ARRAY_SIZE(nvme_std_log_pages);
312
313 nvme_log_disc_scope_t
nvme_log_page_info_scope(const nvme_log_page_info_t * info,const nvme_valid_ctrl_data_t * data)314 nvme_log_page_info_scope(const nvme_log_page_info_t *info,
315 const nvme_valid_ctrl_data_t *data)
316 {
317 if (info->nlpi_scope_func != NULL) {
318 return (info->nlpi_scope_func(data, info));
319 } else {
320 return (info->nlpi_scope);
321 }
322 }
323
324 uint64_t
nvme_log_page_info_size(const nvme_log_page_info_t * info,const nvme_valid_ctrl_data_t * data,bool * var)325 nvme_log_page_info_size(const nvme_log_page_info_t *info,
326 const nvme_valid_ctrl_data_t *data, bool *var)
327 {
328 uint64_t len;
329 *var = info->nlpi_var_func != NULL;
330
331 if (info->nlpi_len_func != NULL) {
332 len = info->nlpi_len_func(data, info);
333 } else {
334 len = info->nlpi_len;
335 }
336
337 /*
338 * Some vendor-specific log pages are not documented to have 4-byte
339 * aligned lengths. This means that to get the full log page you must
340 * round this up to ensure that you end up with a valid request. We opt
341 * to do this here rather than have to check every single log page data
342 * structure and fix it up manually. While it means consumers that are
343 * using this to ignore information about the type itself may
344 * erroneously display extra bytes (e.g. nvmeadm's default hex dumper),
345 * that's better than getting an error or truncating the data.
346 */
347 return (P2ROUNDUP(len, NVME_DWORD_SIZE));
348 }
349
350 bool
nvme_log_page_info_supported(const nvme_log_page_info_t * info,const nvme_valid_ctrl_data_t * data)351 nvme_log_page_info_supported(const nvme_log_page_info_t *info,
352 const nvme_valid_ctrl_data_t *data)
353 {
354 bool vers, sup_func;
355
356 if (info->nlpi_vers != NULL) {
357 vers = nvme_field_atleast(data, info->nlpi_vers);
358 } else {
359 vers = true;
360 }
361
362 if (info->nlpi_sup_func != NULL) {
363 sup_func = info->nlpi_sup_func(data, info);
364 } else {
365 sup_func = true;
366 }
367
368 return (vers && sup_func);
369 }
370