discover/platform-powerpc: Reject bootdevs with empty UUIDs
[petitboot] / discover / platform-powerpc.c
1
2 #include <assert.h>
3 #include <string.h>
4 #include <stdlib.h>
5 #include <limits.h>
6 #include <errno.h>
7 #include <sys/types.h>
8 #include <sys/wait.h>
9 #include <sys/fcntl.h>
10 #include <sys/stat.h>
11 #include <asm/byteorder.h>
12
13 #include <file/file.h>
14 #include <talloc/talloc.h>
15 #include <list/list.h>
16 #include <log/log.h>
17 #include <process/process.h>
18 #include <types/types.h>
19
20 #include "hostboot.h"
21 #include "platform.h"
22 #include "ipmi.h"
23 #include "dt.h"
24
25 static const char *partition = "common";
26 static const char *sysparams_dir = "/sys/firmware/opal/sysparams/";
27 static const char *devtree_dir = "/proc/device-tree/";
28 static const int ipmi_timeout = 5000; /* milliseconds. */
29
30 struct param {
31         char                    *name;
32         char                    *value;
33         bool                    modified;
34         struct list_item        list;
35 };
36
37 struct platform_powerpc {
38         struct list     params;
39         struct ipmi     *ipmi;
40         bool            ipmi_bootdev_persistent;
41         int             (*get_ipmi_bootdev)(
42                                 struct platform_powerpc *platform,
43                                 uint8_t *bootdev, bool *persistent);
44         int             (*clear_ipmi_bootdev)(
45                                 struct platform_powerpc *platform,
46                                 bool persistent);
47         int             (*set_os_boot_sensor)(
48                                 struct platform_powerpc *platform);
49         void            (*get_platform_versions)(struct system_info *info);
50 };
51
52 static const char *known_params[] = {
53         "auto-boot?",
54         "petitboot,network",
55         "petitboot,timeout",
56         "petitboot,bootdevs",
57         "petitboot,language",
58         "petitboot,debug?",
59         "petitboot,write?",
60         "petitboot,snapshots?",
61         "petitboot,console",
62         "petitboot,http_proxy",
63         "petitboot,https_proxy",
64         NULL,
65 };
66
67 #define to_platform_powerpc(p) \
68         (struct platform_powerpc *)(p->platform_data)
69
70 static bool param_is_known(const char *param, unsigned int len)
71 {
72         const char *known_param;
73         unsigned int i;
74
75         for (i = 0; known_params[i]; i++) {
76                 known_param = known_params[i];
77                 if (len == strlen(known_param) &&
78                                 !strncmp(param, known_param, len))
79                         return true;
80         }
81
82         return false;
83 }
84
85 static int parse_nvram_params(struct platform_powerpc *platform,
86                 char *buf, int len)
87 {
88         char *pos, *name, *value;
89         unsigned int paramlen;
90         int i, count;
91
92         /* discard 2 header lines:
93          * "common" partiton"
94          * ------------------
95          */
96         pos = buf;
97         count = 0;
98
99         for (i = 0; i < len; i++) {
100                 if (pos[i] == '\n')
101                         count++;
102                 if (count == 2)
103                         break;
104         }
105
106         if (i == len) {
107                 fprintf(stderr, "failure parsing nvram output\n");
108                 return -1;
109         }
110
111         for (pos = buf + i; pos < buf + len; pos += paramlen + 1) {
112                 unsigned int namelen;
113                 struct param *param;
114                 char *newline;
115
116                 newline = strchr(pos, '\n');
117                 if (!newline)
118                         break;
119
120                 *newline = '\0';
121
122                 paramlen = strlen(pos);
123
124                 name = pos;
125                 value = strchr(pos, '=');
126                 if (!value)
127                         continue;
128
129                 namelen = value - name;
130                 if (namelen == 0)
131                         continue;
132
133                 if (!param_is_known(name, namelen))
134                         continue;
135
136                 value++;
137
138                 param = talloc(platform, struct param);
139                 param->modified = false;
140                 param->name = talloc_strndup(platform, name, namelen);
141                 param->value = talloc_strdup(platform, value);
142                 list_add(&platform->params, &param->list);
143         }
144
145         return 0;
146 }
147
148 static int parse_nvram(struct platform_powerpc *platform)
149 {
150         struct process *process;
151         const char *argv[5];
152         int rc;
153
154         argv[0] = "nvram";
155         argv[1] = "--print-config";
156         argv[2] = "--partition";
157         argv[3] = partition;
158         argv[4] = NULL;
159
160         process = process_create(platform);
161         process->path = "nvram";
162         process->argv = argv;
163         process->keep_stdout = true;
164
165         rc = process_run_sync(process);
166
167         if (rc || !process_exit_ok(process)) {
168                 fprintf(stderr, "nvram process returned "
169                                 "non-zero exit status\n");
170                 rc = -1;
171         } else {
172                 rc = parse_nvram_params(platform, process->stdout_buf,
173                                             process->stdout_len);
174         }
175
176         process_release(process);
177         return rc;
178 }
179
180 static int write_nvram(struct platform_powerpc *platform)
181 {
182         struct process *process;
183         struct param *param;
184         const char *argv[6];
185         int rc = 0;
186
187         argv[0] = "nvram";
188         argv[1] = "--update-config";
189         argv[2] = NULL;
190         argv[3] = "--partition";
191         argv[4] = partition;
192         argv[5] = NULL;
193
194         process = process_create(platform);
195         process->path = "nvram";
196         process->argv = argv;
197
198         list_for_each_entry(&platform->params, param, list) {
199                 char *paramstr;
200
201                 if (!param->modified)
202                         continue;
203
204                 paramstr = talloc_asprintf(platform, "%s=%s",
205                                 param->name, param->value);
206                 argv[2] = paramstr;
207
208                 rc = process_run_sync(process);
209
210                 talloc_free(paramstr);
211
212                 if (rc || !process_exit_ok(process)) {
213                         rc = -1;
214                         pb_log("nvram update process returned "
215                                         "non-zero exit status\n");
216                         break;
217                 }
218         }
219
220         process_release(process);
221         return rc;
222 }
223
224 static const char *get_param(struct platform_powerpc *platform,
225                 const char *name)
226 {
227         struct param *param;
228
229         list_for_each_entry(&platform->params, param, list)
230                 if (!strcmp(param->name, name))
231                         return param->value;
232         return NULL;
233 }
234
235 static void set_param(struct platform_powerpc *platform, const char *name,
236                 const char *value)
237 {
238         struct param *param;
239
240         list_for_each_entry(&platform->params, param, list) {
241                 if (strcmp(param->name, name))
242                         continue;
243
244                 if (!strcmp(param->value, value))
245                         return;
246
247                 talloc_free(param->value);
248                 param->value = talloc_strdup(param, value);
249                 param->modified = true;
250                 return;
251         }
252
253
254         param = talloc(platform, struct param);
255         param->modified = true;
256         param->name = talloc_strdup(platform, name);
257         param->value = talloc_strdup(platform, value);
258         list_add(&platform->params, &param->list);
259 }
260
261 static int parse_hwaddr(struct interface_config *ifconf, char *str)
262 {
263         int i;
264
265         if (strlen(str) != strlen("00:00:00:00:00:00"))
266                 return -1;
267
268         for (i = 0; i < HWADDR_SIZE; i++) {
269                 char byte[3], *endp;
270                 unsigned long x;
271
272                 byte[0] = str[i * 3 + 0];
273                 byte[1] = str[i * 3 + 1];
274                 byte[2] = '\0';
275
276                 x = strtoul(byte, &endp, 16);
277                 if (endp != byte + 2)
278                         return -1;
279
280                 ifconf->hwaddr[i] = x & 0xff;
281         }
282
283         return 0;
284 }
285
286 static int parse_one_interface_config(struct config *config,
287                 char *confstr)
288 {
289         struct interface_config *ifconf;
290         char *tok, *saveptr;
291
292         ifconf = talloc_zero(config, struct interface_config);
293
294         if (!confstr || !strlen(confstr))
295                 goto out_err;
296
297         /* first token should be the mac address */
298         tok = strtok_r(confstr, ",", &saveptr);
299         if (!tok)
300                 goto out_err;
301
302         if (parse_hwaddr(ifconf, tok))
303                 goto out_err;
304
305         /* second token is the method */
306         tok = strtok_r(NULL, ",", &saveptr);
307         if (!tok || !strlen(tok) || !strcmp(tok, "ignore")) {
308                 ifconf->ignore = true;
309
310         } else if (!strcmp(tok, "dhcp")) {
311                 ifconf->method = CONFIG_METHOD_DHCP;
312
313         } else if (!strcmp(tok, "static")) {
314                 ifconf->method = CONFIG_METHOD_STATIC;
315
316                 /* ip/mask, [optional] gateway, [optional] url */
317                 tok = strtok_r(NULL, ",", &saveptr);
318                 if (!tok)
319                         goto out_err;
320                 ifconf->static_config.address =
321                         talloc_strdup(ifconf, tok);
322
323                 tok = strtok_r(NULL, ",", &saveptr);
324                 if (tok) {
325                         ifconf->static_config.gateway =
326                                 talloc_strdup(ifconf, tok);
327                 }
328
329                 tok = strtok_r(NULL, ",", &saveptr);
330                 if (tok) {
331                         ifconf->static_config.url =
332                                 talloc_strdup(ifconf, tok);
333                 }
334
335         } else {
336                 pb_log("Unknown network configuration method %s\n", tok);
337                 goto out_err;
338         }
339
340         config->network.interfaces = talloc_realloc(config,
341                         config->network.interfaces,
342                         struct interface_config *,
343                         ++config->network.n_interfaces);
344
345         config->network.interfaces[config->network.n_interfaces - 1] = ifconf;
346
347         return 0;
348 out_err:
349         talloc_free(ifconf);
350         return -1;
351 }
352
353 static int parse_one_dns_config(struct config *config,
354                 char *confstr)
355 {
356         char *tok, *saveptr = NULL;
357
358         for (tok = strtok_r(confstr, ",", &saveptr); tok;
359                         tok = strtok_r(NULL, ",", &saveptr)) {
360
361                 char *server = talloc_strdup(config, tok);
362
363                 config->network.dns_servers = talloc_realloc(config,
364                                 config->network.dns_servers, const char *,
365                                 ++config->network.n_dns_servers);
366
367                 config->network.dns_servers[config->network.n_dns_servers - 1]
368                                 = server;
369         }
370
371         return 0;
372 }
373
374 static void populate_network_config(struct platform_powerpc *platform,
375                 struct config *config)
376 {
377         char *val, *saveptr = NULL;
378         const char *cval;
379         int i;
380
381         cval = get_param(platform, "petitboot,network");
382         if (!cval || !strlen(cval))
383                 return;
384
385         val = talloc_strdup(config, cval);
386
387         for (i = 0; ; i++) {
388                 char *tok;
389
390                 tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr);
391                 if (!tok)
392                         break;
393
394                 if (!strncasecmp(tok, "dns,", strlen("dns,")))
395                         parse_one_dns_config(config, tok + strlen("dns,"));
396                 else
397                         parse_one_interface_config(config, tok);
398
399         }
400
401         talloc_free(val);
402 }
403
404 static int read_bootdev(void *ctx, char **pos, struct autoboot_option *opt)
405 {
406         char *delim = strchr(*pos, ' ');
407         int len, prefix = 0, rc = -1;
408         enum device_type type;
409
410         if (!strncmp(*pos, "uuid:", strlen("uuid:"))) {
411                 prefix = strlen("uuid:");
412                 opt->boot_type = BOOT_DEVICE_UUID;
413         } else if (!strncmp(*pos, "mac:", strlen("mac:"))) {
414                 prefix = strlen("mac:");
415                 opt->boot_type = BOOT_DEVICE_UUID;
416         } else {
417                 type = find_device_type(*pos);
418                 if (type != DEVICE_TYPE_UNKNOWN) {
419                         opt->type = type;
420                         opt->boot_type = BOOT_DEVICE_TYPE;
421                         rc = 0;
422                 }
423         }
424
425         if (opt->boot_type == BOOT_DEVICE_UUID) {
426                 if (delim)
427                         len = (int)(delim - *pos) - prefix;
428                 else
429                         len = strlen(*pos) - prefix;
430
431                 if (len) {
432                         opt->uuid = talloc_strndup(ctx, *pos + prefix, len);
433                         rc = 0;
434                 }
435         }
436
437         /* Always advance pointer to next option or end */
438         if (delim)
439                 *pos = delim + 1;
440         else
441                 *pos += strlen(*pos);
442
443         return rc;
444 }
445
446 static void populate_bootdev_config(struct platform_powerpc *platform,
447                 struct config *config)
448 {
449         struct autoboot_option *opt, *new = NULL;
450         char *pos, *end;
451         unsigned int n_new = 0;
452         const char *val;
453
454         /* Check for ordered bootdevs */
455         val = get_param(platform, "petitboot,bootdevs");
456         if (!val || !strlen(val)) {
457                 pos = end = NULL;
458         } else {
459                 pos = talloc_strdup(config, val);
460                 end = strchr(pos, '\0');
461         }
462
463         while (pos && pos < end) {
464                 opt = talloc(config, struct autoboot_option);
465
466                 if (read_bootdev(config, &pos, opt)) {
467                         pb_log("bootdev config is in an unknown format "
468                                "(expected uuid:... or mac:...)\n");
469                         talloc_free(opt);
470                         continue;
471                 }
472
473                 new = talloc_realloc(config, new, struct autoboot_option,
474                                      n_new + 1);
475                 new[n_new] = *opt;
476                 n_new++;
477                 talloc_free(opt);
478
479         }
480
481         if (!n_new) {
482                 /* If autoboot has been disabled, clear the default options */
483                 if (!config->autoboot_enabled) {
484                         talloc_free(config->autoboot_opts);
485                         config->n_autoboot_opts = 0;
486                 }
487                 return;
488         }
489
490         talloc_free(config->autoboot_opts);
491         config->autoboot_opts = new;
492         config->n_autoboot_opts = n_new;
493 }
494
495 static void set_proxy_variables(struct config *config)
496 {
497         if (config->http_proxy)
498                 setenv("http_proxy", config->http_proxy, 1);
499         else
500                 unsetenv("http_proxy");
501
502         if (config->https_proxy)
503                 setenv("https_proxy", config->https_proxy, 1);
504         else
505                 unsetenv("https_proxy");
506 }
507
508 static void populate_config(struct platform_powerpc *platform,
509                 struct config *config)
510 {
511         const char *val;
512         char *end;
513         unsigned long timeout;
514
515         /* if the "auto-boot?' property is present and "false", disable auto
516          * boot */
517         val = get_param(platform, "auto-boot?");
518         config->autoboot_enabled = !val || strcmp(val, "false");
519
520         val = get_param(platform, "petitboot,timeout");
521         if (val) {
522                 timeout = strtoul(val, &end, 10);
523                 if (end != val) {
524                         if (timeout >= INT_MAX)
525                                 timeout = INT_MAX;
526                         config->autoboot_timeout_sec = (int)timeout;
527                 }
528         }
529
530         val = get_param(platform, "petitboot,language");
531         config->lang = val ? talloc_strdup(config, val) : NULL;
532
533         populate_network_config(platform, config);
534
535         populate_bootdev_config(platform, config);
536
537         if (!config->debug) {
538                 val = get_param(platform, "petitboot,debug?");
539                 config->debug = val && !strcmp(val, "true");
540         }
541
542         val = get_param(platform, "petitboot,write?");
543         if (val)
544                 config->allow_writes = !strcmp(val, "true");
545
546         val = get_param(platform, "petitboot,snapshots?");
547         if (val)
548                 config->disable_snapshots = !strcmp(val, "false");
549
550         val = get_param(platform, "petitboot,console");
551         if (val)
552                 config->boot_console = talloc_strdup(config, val);
553         /* If a full path is already set we don't want to override it */
554         config->manual_console = config->boot_console &&
555                                         !strchr(config->boot_console, '[');
556
557         val = get_param(platform, "petitboot,http_proxy");
558         if (val)
559                 config->http_proxy = talloc_strdup(config, val);
560         val = get_param(platform, "petitboot,https_proxy");
561         if (val)
562                 config->https_proxy = talloc_strdup(config, val);
563         set_proxy_variables(config);
564 }
565
566 static char *iface_config_str(void *ctx, struct interface_config *config)
567 {
568         char *str;
569
570         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
571          * different hardware address formats */
572         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
573                         config->hwaddr[0], config->hwaddr[1],
574                         config->hwaddr[2], config->hwaddr[3],
575                         config->hwaddr[4], config->hwaddr[5]);
576
577         if (config->ignore) {
578                 str = talloc_asprintf_append(str, "ignore");
579
580         } else if (config->method == CONFIG_METHOD_DHCP) {
581                 str = talloc_asprintf_append(str, "dhcp");
582
583         } else if (config->method == CONFIG_METHOD_STATIC) {
584                 str = talloc_asprintf_append(str, "static,%s%s%s%s%s",
585                                 config->static_config.address,
586                                 config->static_config.gateway ? "," : "",
587                                 config->static_config.gateway ?: "",
588                                 config->static_config.url ? "," : "",
589                                 config->static_config.url ?: "");
590         }
591         return str;
592 }
593
594 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
595 {
596         char *str;
597         int i;
598
599         str = talloc_strdup(ctx, "dns,");
600         for (i = 0; i < n; i++) {
601                 str = talloc_asprintf_append(str, "%s%s",
602                                 i == 0 ? "" : ",",
603                                 dns_servers[i]);
604         }
605
606         return str;
607 }
608
609 static void update_string_config(struct platform_powerpc *platform,
610                 const char *name, const char *value)
611 {
612         const char *cur;
613
614         cur = get_param(platform, name);
615
616         /* don't set an empty parameter if it doesn't already exist */
617         if (!cur && !strlen(value))
618                 return;
619
620         set_param(platform, name, value);
621 }
622
623 static void update_network_config(struct platform_powerpc *platform,
624         struct config *config)
625 {
626         unsigned int i;
627         char *val;
628
629         /*
630          * Don't store IPMI overrides to NVRAM. If this was a persistent
631          * override it was already stored in NVRAM by
632          * get_ipmi_network_override()
633          */
634         if (config->network.n_interfaces &&
635                 config->network.interfaces[0]->override)
636                 return;
637
638         val = talloc_strdup(platform, "");
639
640         for (i = 0; i < config->network.n_interfaces; i++) {
641                 char *iface_str = iface_config_str(platform,
642                                         config->network.interfaces[i]);
643                 val = talloc_asprintf_append(val, "%s%s",
644                                 *val == '\0' ? "" : " ", iface_str);
645                 talloc_free(iface_str);
646         }
647
648         if (config->network.n_dns_servers) {
649                 char *dns_str = dns_config_str(platform,
650                                                 config->network.dns_servers,
651                                                 config->network.n_dns_servers);
652                 val = talloc_asprintf_append(val, "%s%s",
653                                 *val == '\0' ? "" : " ", dns_str);
654                 talloc_free(dns_str);
655         }
656
657         update_string_config(platform, "petitboot,network", val);
658
659         talloc_free(val);
660 }
661
662 static void update_bootdev_config(struct platform_powerpc *platform,
663                 struct config *config)
664 {
665         char *val = NULL, *boot_str = NULL, *tmp = NULL;
666         struct autoboot_option *opt;
667         const char delim = ' ';
668         unsigned int i;
669
670         if (!config->n_autoboot_opts)
671                 val = "";
672
673         for (i = 0; i < config->n_autoboot_opts; i++) {
674                 opt = &config->autoboot_opts[i];
675                 switch (opt->boot_type) {
676                         case BOOT_DEVICE_TYPE:
677                                 boot_str = talloc_asprintf(config, "%s%c",
678                                                 device_type_name(opt->type),
679                                                 delim);
680                                 break;
681                         case BOOT_DEVICE_UUID:
682                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
683                                                 opt->uuid, delim);
684                                 break;
685                         }
686                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
687         }
688
689         update_string_config(platform, "petitboot,bootdevs", val);
690         talloc_free(tmp);
691         if (boot_str)
692                 talloc_free(boot_str);
693 }
694
695 static int update_config(struct platform_powerpc *platform,
696                 struct config *config, struct config *defaults)
697 {
698         char *tmp = NULL;
699         const char *val;
700
701         if (config->autoboot_enabled == defaults->autoboot_enabled)
702                 val = "";
703         else
704                 val = config->autoboot_enabled ? "true" : "false";
705         update_string_config(platform, "auto-boot?", val);
706
707         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
708                 val = "";
709         else
710                 val = tmp = talloc_asprintf(platform, "%d",
711                                 config->autoboot_timeout_sec);
712
713         if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID &&
714             platform->clear_ipmi_bootdev) {
715                 platform->clear_ipmi_bootdev(platform,
716                                 config->ipmi_bootdev_persistent);
717                 config->ipmi_bootdev = IPMI_BOOTDEV_NONE;
718                 config->ipmi_bootdev_persistent = false;
719         }
720
721         update_string_config(platform, "petitboot,timeout", val);
722         if (tmp)
723                 talloc_free(tmp);
724
725         val = config->lang ?: "";
726         update_string_config(platform, "petitboot,language", val);
727
728         if (config->allow_writes == defaults->allow_writes)
729                 val = "";
730         else
731                 val = config->allow_writes ? "true" : "false";
732         update_string_config(platform, "petitboot,write?", val);
733
734         if (!config->manual_console) {
735                 val = config->boot_console ?: "";
736                 update_string_config(platform, "petitboot,console", val);
737         }
738
739         val = config->http_proxy ?: "";
740         update_string_config(platform, "petitboot,http_proxy", val);
741         val = config->https_proxy ?: "";
742         update_string_config(platform, "petitboot,https_proxy", val);
743         set_proxy_variables(config);
744
745         update_network_config(platform, config);
746
747         update_bootdev_config(platform, config);
748
749         return write_nvram(platform);
750 }
751
752 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
753                 bool persistent)
754 {
755         config->ipmi_bootdev = bootdev;
756         config->ipmi_bootdev_persistent = persistent;
757
758         switch (bootdev) {
759         case IPMI_BOOTDEV_NONE:
760         case IPMI_BOOTDEV_DISK:
761         case IPMI_BOOTDEV_NETWORK:
762         case IPMI_BOOTDEV_CDROM:
763         default:
764                 break;
765         case IPMI_BOOTDEV_SETUP:
766                 config->autoboot_enabled = false;
767                 break;
768         case IPMI_BOOTDEV_SAFE:
769                 config->autoboot_enabled = false;
770                 config->safe_mode = true;
771                 break;
772         }
773 }
774
775 static int read_bootdev_sysparam(const char *name, uint8_t *val)
776 {
777         uint8_t buf[2];
778         char path[50];
779         int fd, rc;
780
781         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
782         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
783
784         fd = open(path, O_RDONLY);
785         if (fd < 0) {
786                 pb_debug("powerpc: can't access sysparam %s\n",
787                                 name);
788                 return -1;
789         }
790
791         rc = read(fd, buf, sizeof(buf));
792
793         close(fd);
794
795         /* bootdev definitions should only be one byte in size */
796         if (rc != 1) {
797                 pb_debug("powerpc: sysparam %s read returned %d\n",
798                                 name, rc);
799                 return -1;
800         }
801
802         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
803
804         if (!ipmi_bootdev_is_valid(buf[0]))
805                 return -1;
806
807         *val = buf[0];
808         return 0;
809 }
810
811 static int write_bootdev_sysparam(const char *name, uint8_t val)
812 {
813         char path[50];
814         int fd, rc;
815
816         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
817         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
818
819         fd = open(path, O_WRONLY);
820         if (fd < 0) {
821                 pb_debug("powerpc: can't access sysparam %s for writing\n",
822                                 name);
823                 return -1;
824         }
825
826         for (;;) {
827                 errno = 0;
828                 rc = write(fd, &val, sizeof(val));
829                 if (rc == sizeof(val)) {
830                         rc = 0;
831                         break;
832                 }
833
834                 if (rc <= 0 && errno != EINTR) {
835                         pb_log("powerpc: error updating sysparam %s: %s",
836                                         name, strerror(errno));
837                         rc = -1;
838                         break;
839                 }
840         }
841
842         close(fd);
843
844         if (!rc)
845                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
846
847         return rc;
848 }
849
850 static int clear_ipmi_bootdev_sysparams(
851                 struct platform_powerpc *platform __attribute__((unused)),
852                 bool persistent)
853 {
854         if (persistent) {
855                 /* invalidate default-boot-device setting */
856                 write_bootdev_sysparam("default-boot-device", 0xff);
857         } else {
858                 /* invalidate next-boot-device setting */
859                 write_bootdev_sysparam("next-boot-device", 0xff);
860         }
861         return 0;
862 }
863
864 static int get_ipmi_bootdev_sysparams(
865                 struct platform_powerpc *platform __attribute__((unused)),
866                 uint8_t *bootdev, bool *persistent)
867 {
868         uint8_t next_bootdev, default_bootdev;
869         bool next_valid, default_valid;
870         int rc;
871
872         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
873         next_valid = rc == 0;
874
875         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
876         default_valid = rc == 0;
877
878         /* nothing valid? no need to change the config */
879         if (!next_valid && !default_valid)
880                 return -1;
881
882         *persistent = !next_valid;
883         *bootdev = next_valid ? next_bootdev : default_bootdev;
884         return 0;
885 }
886
887 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
888                                    bool persistent __attribute__((unused)))
889 {
890         uint16_t resp_len;
891         uint8_t resp[1];
892         uint8_t req[] = {
893                 0x05, /* parameter selector: boot flags */
894                 0x80, /* data 1: valid */
895                 0x00, /* data 2: bootdev: no override */
896                 0x00, /* data 3: system defaults */
897                 0x00, /* data 4: no request for shared mode, mux defaults */
898                 0x00, /* data 5: no instance request */
899         };
900
901         resp_len = sizeof(resp);
902
903         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
904                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
905                         req, sizeof(req),
906                         resp, &resp_len,
907                         ipmi_timeout);
908         return 0;
909 }
910
911 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
912                 uint8_t *bootdev, bool *persistent)
913 {
914         uint16_t resp_len;
915         uint8_t resp[8];
916         int rc;
917         uint8_t req[] = {
918                 0x05, /* parameter selector: boot flags */
919                 0x00, /* no set selector */
920                 0x00, /* no block selector */
921         };
922
923         resp_len = sizeof(resp);
924         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
925                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
926                         req, sizeof(req),
927                         resp, &resp_len,
928                         ipmi_timeout);
929         if (rc) {
930                 pb_log("platform: error reading IPMI boot options\n");
931                 return -1;
932         }
933
934         if (resp_len != sizeof(resp)) {
935                 pb_log("platform: unexpected length (%d) in "
936                                 "boot options response\n", resp_len);
937                 return -1;
938         }
939
940         pb_debug("IPMI get_bootdev response:\n");
941         for (int i = 0; i < resp_len; i++)
942                 pb_debug("%x ", resp[i]);
943         pb_debug("\n");
944
945         if (resp[0] != 0) {
946                 pb_log("platform: non-zero completion code %d from IPMI req\n",
947                                 resp[0]);
948                 return -1;
949         }
950
951         /* check for correct parameter version */
952         if ((resp[1] & 0xf) != 0x1) {
953                 pb_log("platform: unexpected version (0x%x) in "
954                                 "boot options response\n", resp[0]);
955                 return -1;
956         }
957
958         /* check for valid paramters */
959         if (resp[2] & 0x80) {
960                 pb_debug("platform: boot options are invalid/locked\n");
961                 return -1;
962         }
963
964         *persistent = false;
965
966         /* check for valid flags */
967         if (!(resp[3] & 0x80)) {
968                 pb_debug("platform: boot flags are invalid, ignoring\n");
969                 return -1;
970         }
971
972         *persistent = resp[3] & 0x40;
973         *bootdev = (resp[4] >> 2) & 0x0f;
974         return 0;
975 }
976
977 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
978 {
979         int sensor_number;
980         uint16_t resp_len;
981         uint8_t resp[1];
982         uint8_t req[] = {
983                 0x00, /* sensor number: os boot */
984                 0xA9, /* operation: set everything */
985                 0x00, /* sensor reading: none */
986                 0x40, /* assertion mask lsb: set state 6 */
987                 0x00, /* assertion mask msb: none */
988                 0x00, /* deassertion mask lsb: none */
989                 0x00, /* deassertion mask msb: none */
990                 0x00, /* event data 1: none */
991                 0x00, /* event data 2: none */
992                 0x00, /* event data 3: none */
993         };
994
995         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
996         if (sensor_number < 0) {
997                 pb_log("Couldn't find OS boot sensor in device tree\n");
998                 return -1;
999         }
1000
1001         req[0] = sensor_number;
1002
1003         resp_len = sizeof(resp);
1004
1005         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
1006                         IPMI_CMD_SENSOR_SET,
1007                         req, sizeof(req),
1008                         resp, &resp_len,
1009                         ipmi_timeout); return 0;
1010
1011         return 0;
1012 }
1013
1014 static void get_ipmi_bmc_mac(struct platform *p, uint8_t *buf)
1015 {
1016         struct platform_powerpc *platform = p->platform_data;
1017         uint16_t resp_len = 8;
1018         uint8_t resp[8];
1019         uint8_t req[] = { 0x1, 0x5, 0x0, 0x0 };
1020         int i, rc;
1021
1022         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_TRANSPORT,
1023                         IPMI_CMD_TRANSPORT_GET_LAN_PARAMS,
1024                         req, sizeof(req),
1025                         resp, &resp_len,
1026                         ipmi_timeout);
1027
1028         pb_debug("BMC MAC resp [%d][%d]:\n", rc, resp_len);
1029
1030         if (rc == 0 && resp_len > 0) {
1031                 for (i = 2; i < resp_len; i++) {
1032                         pb_debug(" %x", resp[i]);
1033                         buf[i - 2] = resp[i];
1034                 }
1035                 pb_debug("\n");
1036         }
1037
1038 }
1039
1040 /*
1041  * Retrieve info from the "Get Device ID" IPMI commands.
1042  * See Chapter 20.1 in the IPMIv2 specification.
1043  */
1044 static void get_ipmi_bmc_versions(struct platform *p, struct system_info *info)
1045 {
1046         struct platform_powerpc *platform = p->platform_data;
1047         uint16_t resp_len = 16;
1048         uint8_t resp[16], bcd;
1049         uint32_t aux_version;
1050         int i, rc;
1051
1052         /* Retrieve info from current side */
1053         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_APP,
1054                         IPMI_CMD_APP_GET_DEVICE_ID,
1055                         NULL, 0,
1056                         resp, &resp_len,
1057                         ipmi_timeout);
1058
1059         pb_debug("BMC version resp [%d][%d]:\n", rc, resp_len);
1060         if (resp_len > 0) {
1061                 for (i = 0; i < resp_len; i++) {
1062                         pb_debug(" %x", resp[i]);
1063                 }
1064                 pb_debug("\n");
1065         }
1066
1067         if (rc == 0 && resp_len == 16) {
1068                 info->bmc_current = talloc_array(info, char *, 4);
1069                 info->n_bmc_current = 4;
1070
1071                 info->bmc_current[0] = talloc_asprintf(info, "Device ID: 0x%x",
1072                                                 resp[1]);
1073                 info->bmc_current[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1074                                                 resp[2]);
1075                 bcd = resp[4] & 0x0f;
1076                 bcd += 10 * (resp[4] >> 4);
1077                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1078                 info->bmc_current[2] = talloc_asprintf(info,
1079                                                 "Firmware version: %u.%02u.%05u",
1080                                                 resp[3], bcd, aux_version);
1081                 bcd = resp[5] & 0x0f;
1082                 bcd += 10 * (resp[5] >> 4);
1083                 info->bmc_current[3] = talloc_asprintf(info, "IPMI version: %u",
1084                                                 bcd);
1085         } else
1086                 pb_log("Failed to retrieve Device ID from IPMI\n");
1087
1088         /* Retrieve info from golden side */
1089         memset(resp, 0, sizeof(resp));
1090         resp_len = 16;
1091         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_AMI,
1092                         IPMI_CMD_APP_GET_DEVICE_ID_GOLDEN,
1093                         NULL, 0,
1094                         resp, &resp_len,
1095                         ipmi_timeout);
1096
1097         pb_debug("BMC golden resp [%d][%d]:\n", rc, resp_len);
1098         if (resp_len > 0) {
1099                 for (i = 0; i < resp_len; i++) {
1100                         pb_debug(" %x", resp[i]);
1101                 }
1102                 pb_debug("\n");
1103         }
1104
1105         if (rc == 0 && resp_len == 16) {
1106                 info->bmc_golden = talloc_array(info, char *, 4);
1107                 info->n_bmc_golden = 4;
1108
1109                 info->bmc_golden[0] = talloc_asprintf(info, "Device ID: 0x%x",
1110                                                 resp[1]);
1111                 info->bmc_golden[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1112                                                 resp[2]);
1113                 bcd = resp[4] & 0x0f;
1114                 bcd += 10 * (resp[4] >> 4);
1115                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1116                 info->bmc_golden[2] = talloc_asprintf(info,
1117                                                 "Firmware version: %u.%02u.%u",
1118                                                 resp[3], bcd, aux_version);
1119                 bcd = resp[5] & 0x0f;
1120                 bcd += 10 * (resp[5] >> 4);
1121                 info->bmc_golden[3] = talloc_asprintf(info, "IPMI version: %u",
1122                                                 bcd);
1123         } else
1124                 pb_log("Failed to retrieve Golden Device ID from IPMI\n");
1125 }
1126
1127 static void get_ipmi_network_override(struct platform_powerpc *platform,
1128                         struct config *config)
1129 {
1130         uint16_t min_len = 12, resp_len = 53, version;
1131         const uint32_t magic_value = 0x21706221;
1132         uint8_t resp[resp_len];
1133         uint32_t cookie;
1134         bool persistent;
1135         int i, rc;
1136         uint8_t req[] = {
1137                 0x61, /* parameter selector: OEM section (network) */
1138                 0x00, /* no set selector */
1139                 0x00, /* no block selector */
1140         };
1141
1142         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
1143                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
1144                         req, sizeof(req),
1145                         resp, &resp_len,
1146                         ipmi_timeout);
1147
1148         pb_debug("IPMI net override resp [%d][%d]:\n", rc, resp_len);
1149         if (resp_len > 0) {
1150                 for (i = 0; i < resp_len; i++) {
1151                         pb_debug(" %02x", resp[i]);
1152                         if (i && (i + 1) % 16 == 0 && i != resp_len - 1)
1153                                 pb_debug("\n");
1154                         else if (i && (i + 1) % 8 == 0)
1155                                 pb_debug(" ");
1156                 }
1157                 pb_debug("\n");
1158         }
1159
1160         if (rc) {
1161                 pb_debug("IPMI network config option unavailable\n");
1162                 return;
1163         }
1164
1165         if (resp_len < min_len) {
1166                 pb_debug("IPMI net response too small\n");
1167                 return;
1168         }
1169
1170         if (resp[0] != 0) {
1171                 pb_log("platform: non-zero completion code %d from IPMI network req\n",
1172                        resp[0]);
1173                 return;
1174         }
1175
1176         /* Check for correct parameter version */
1177         if ((resp[1] & 0xf) != 0x1) {
1178                 pb_log("platform: unexpected version (0x%x) in network override response\n",
1179                        resp[0]);
1180                 return;
1181         }
1182
1183         /* Check that the parameters are valid */
1184         if (resp[2] & 0x80) {
1185                 pb_debug("platform: network override is invalid/locked\n");
1186                 return;
1187         }
1188
1189         /* Check for valid parameters in the boot flags section */
1190         if (!(resp[3] & 0x80)) {
1191                 pb_debug("platform: network override valid flag not set\n");
1192                 return;
1193         }
1194         /* Read the persistent flag; if it is set we need to save this config */
1195         persistent = resp[3] & 0x40;
1196         if (persistent)
1197                 pb_debug("platform: network override is persistent\n");
1198
1199         /* Check 4-byte cookie value */
1200         i = 4;
1201         memcpy(&cookie, &resp[i], sizeof(cookie));
1202         cookie = __be32_to_cpu(cookie);
1203         if (cookie != magic_value) {
1204                 pb_log("%s: Incorrect cookie %x\n", __func__, cookie);
1205                 return;
1206         }
1207         i += sizeof(cookie);
1208
1209         /* Check 2-byte version number */
1210         memcpy(&version, &resp[i], sizeof(version));
1211         version = __be16_to_cpu(version);
1212         i += sizeof(version);
1213         if (version != 1) {
1214                 pb_debug("Unexpected version: %u\n", version);
1215                 return;
1216         }
1217
1218         /* Interpret the rest of the interface config */
1219         rc = parse_ipmi_interface_override(config, &resp[i], resp_len - i);
1220
1221         if (!rc && persistent) {
1222                 /* Write this new config to NVRAM */
1223                 update_network_config(platform, config);
1224                 rc = write_nvram(platform);
1225                 if (rc)
1226                         pb_log("platform: Failed to save persistent interface override\n");
1227         }
1228 }
1229
1230 static void get_active_consoles(struct config *config)
1231 {
1232         struct stat sbuf;
1233         char *fsp_prop = NULL;
1234
1235         config->n_consoles = 2;
1236         config->consoles = talloc_array(config, char *, config->n_consoles);
1237         if (!config->consoles)
1238                 goto err;
1239
1240         config->consoles[0] = talloc_asprintf(config->consoles,
1241                                         "/dev/hvc0 [IPMI / Serial]");
1242         config->consoles[1] = talloc_asprintf(config->consoles,
1243                                         "/dev/tty1 [VGA]");
1244
1245         fsp_prop = talloc_asprintf(config, "%sfsps", devtree_dir);
1246         if (stat(fsp_prop, &sbuf) == 0) {
1247                 /* FSP based machines also have a separate serial console */
1248                 config->consoles = talloc_realloc(config, config->consoles,
1249                                                 char *, config->n_consoles + 1);
1250                 if (!config->consoles)
1251                         goto err;
1252                 config->consoles[config->n_consoles++] = talloc_asprintf(
1253                                                 config->consoles,
1254                                                 "/dev/hvc1 [Serial]");
1255         }
1256
1257         return;
1258 err:
1259         config->n_consoles = 0;
1260         pb_log("Failed to allocate memory for consoles\n");
1261 }
1262
1263 static int load_config(struct platform *p, struct config *config)
1264 {
1265         struct platform_powerpc *platform = to_platform_powerpc(p);
1266         int rc;
1267
1268         rc = parse_nvram(platform);
1269         if (rc)
1270                 return rc;
1271
1272         populate_config(platform, config);
1273
1274         if (platform->get_ipmi_bootdev) {
1275                 bool bootdev_persistent;
1276                 uint8_t bootdev = IPMI_BOOTDEV_INVALID;
1277                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1278                                 &bootdev_persistent);
1279                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1280                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1281                 }
1282         }
1283
1284         if (platform->ipmi)
1285                 get_ipmi_network_override(platform, config);
1286
1287         get_active_consoles(config);
1288
1289         return 0;
1290 }
1291
1292 static int save_config(struct platform *p, struct config *config)
1293 {
1294         struct platform_powerpc *platform = to_platform_powerpc(p);
1295         struct config *defaults;
1296         int rc;
1297
1298         defaults = talloc_zero(platform, struct config);
1299         config_set_defaults(defaults);
1300
1301         rc = update_config(platform, config, defaults);
1302
1303         talloc_free(defaults);
1304         return rc;
1305 }
1306
1307 static void pre_boot(struct platform *p, const struct config *config)
1308 {
1309         struct platform_powerpc *platform = to_platform_powerpc(p);
1310
1311         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1312                 platform->clear_ipmi_bootdev(platform, false);
1313
1314         if (platform->set_os_boot_sensor)
1315                 platform->set_os_boot_sensor(platform);
1316 }
1317
1318 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1319 {
1320         struct platform_powerpc *platform = p->platform_data;
1321         char *buf, *filename;
1322         int len, rc;
1323
1324         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1325         rc = read_file(platform, filename, &buf, &len);
1326         if (rc == 0)
1327                 sysinfo->type = talloc_steal(sysinfo, buf);
1328         talloc_free(filename);
1329
1330         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1331         rc = read_file(platform, filename, &buf, &len);
1332         if (rc == 0)
1333                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1334         talloc_free(filename);
1335
1336         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
1337         if (platform->ipmi)
1338                 get_ipmi_bmc_mac(p, sysinfo->bmc_mac);
1339
1340         if (platform->ipmi)
1341                 get_ipmi_bmc_versions(p, sysinfo);
1342
1343         if (platform->get_platform_versions)
1344                 platform->get_platform_versions(sysinfo);
1345
1346         return 0;
1347 }
1348
1349 static bool probe(struct platform *p, void *ctx)
1350 {
1351         struct platform_powerpc *platform;
1352         struct stat statbuf;
1353         bool bmc_present;
1354         int rc;
1355
1356         /* we need a device tree */
1357         rc = stat("/proc/device-tree", &statbuf);
1358         if (rc)
1359                 return false;
1360
1361         if (!S_ISDIR(statbuf.st_mode))
1362                 return false;
1363
1364         platform = talloc_zero(ctx, struct platform_powerpc);
1365         list_init(&platform->params);
1366
1367         p->platform_data = platform;
1368
1369         bmc_present = stat("/proc/device-tree/bmc", &statbuf) == 0;
1370
1371         if (ipmi_present() && bmc_present) {
1372                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1373                 platform->ipmi = ipmi_open(platform);
1374                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1375                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1376                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1377         } else if (!stat(sysparams_dir, &statbuf)) {
1378                 pb_debug("platform: using sysparams for IPMI paramters\n");
1379                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1380                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1381
1382         } else {
1383                 pb_log("platform: no IPMI parameter support\n");
1384         }
1385
1386         if (bmc_present)
1387                 platform->get_platform_versions = hostboot_load_versions;
1388
1389         return true;
1390 }
1391
1392
1393 static struct platform platform_powerpc = {
1394         .name                   = "powerpc",
1395         .dhcp_arch_id           = 0x000e,
1396         .probe                  = probe,
1397         .load_config            = load_config,
1398         .save_config            = save_config,
1399         .pre_boot               = pre_boot,
1400         .get_sysinfo            = get_sysinfo,
1401 };
1402
1403 register_platform(platform_powerpc);