11 #include <sys/mount.h>
13 #include <talloc/talloc.h>
14 #include <list/list.h>
16 #include <types/types.h>
17 #include <system/system.h>
18 #include <process/process.h>
20 #include <i18n/i18n.h>
22 #include <sys/types.h>
23 #include <sys/socket.h>
25 #include <arpa/inet.h>
27 #include "device-handler.h"
28 #include "discover-server.h"
29 #include "devmapper.h"
30 #include "user-event.h"
42 enum default_priority {
43 DEFAULT_PRIORITY_REMOTE = 1,
44 DEFAULT_PRIORITY_LOCAL_FIRST = 2,
45 DEFAULT_PRIORITY_LOCAL_LAST = 0xfe,
46 DEFAULT_PRIORITY_DISABLED = 0xff,
49 struct device_handler {
50 struct discover_server *server;
54 struct network *network;
55 struct user_event *user_event;
57 struct discover_device **devices;
58 unsigned int n_devices;
60 struct ramdisk_device **ramdisks;
61 unsigned int n_ramdisks;
63 struct waitset *waitset;
64 struct waiter *timeout_waiter;
65 bool autoboot_enabled;
66 unsigned int sec_to_boot;
68 struct discover_boot_option *default_boot_option;
69 int default_boot_option_priority;
71 struct list unresolved_boot_options;
73 struct boot_task *pending_boot;
74 bool pending_boot_is_default;
77 static int mount_device(struct discover_device *dev);
78 static int umount_device(struct discover_device *dev);
80 static int device_handler_init_sources(struct device_handler *handler);
81 static void device_handler_reinit_sources(struct device_handler *handler);
83 static void device_handler_update_lang(const char *lang);
85 void discover_context_add_boot_option(struct discover_context *ctx,
86 struct discover_boot_option *boot_option)
88 boot_option->source = ctx->parser;
89 list_add_tail(&ctx->boot_options, &boot_option->list);
90 talloc_steal(ctx, boot_option);
94 * device_handler_get_device_count - Get the count of current handler devices.
97 int device_handler_get_device_count(const struct device_handler *handler)
99 return handler->n_devices;
103 * device_handler_get_device - Get a handler device by index.
106 const struct discover_device *device_handler_get_device(
107 const struct device_handler *handler, unsigned int index)
109 if (index >= handler->n_devices) {
110 assert(0 && "bad index");
114 return handler->devices[index];
117 struct discover_boot_option *discover_boot_option_create(
118 struct discover_context *ctx,
119 struct discover_device *device)
121 struct discover_boot_option *opt;
123 opt = talloc_zero(ctx, struct discover_boot_option);
124 opt->option = talloc_zero(opt, struct boot_option);
125 opt->device = device;
130 static int device_match_uuid(struct discover_device *dev, const char *uuid)
132 return dev->uuid && !strcmp(dev->uuid, uuid);
135 static int device_match_label(struct discover_device *dev, const char *label)
137 return dev->label && !strcmp(dev->label, label);
140 static int device_match_id(struct discover_device *dev, const char *id)
142 return !strcmp(dev->device->id, id);
145 static int device_match_serial(struct discover_device *dev, const char *serial)
147 const char *val = discover_device_get_param(dev, "ID_SERIAL");
148 return val && !strcmp(val, serial);
151 static struct discover_device *device_lookup(
152 struct device_handler *device_handler,
153 int (match_fn)(struct discover_device *, const char *),
156 struct discover_device *dev;
162 for (i = 0; i < device_handler->n_devices; i++) {
163 dev = device_handler->devices[i];
165 if (match_fn(dev, str))
172 struct discover_device *device_lookup_by_name(struct device_handler *handler,
175 if (!strncmp(name, "/dev/", strlen("/dev/")))
176 name += strlen("/dev/");
178 return device_lookup_by_id(handler, name);
181 struct discover_device *device_lookup_by_uuid(
182 struct device_handler *device_handler,
185 return device_lookup(device_handler, device_match_uuid, uuid);
188 struct discover_device *device_lookup_by_label(
189 struct device_handler *device_handler,
192 return device_lookup(device_handler, device_match_label, label);
195 struct discover_device *device_lookup_by_id(
196 struct device_handler *device_handler,
199 return device_lookup(device_handler, device_match_id, id);
202 struct discover_device *device_lookup_by_serial(
203 struct device_handler *device_handler,
206 return device_lookup(device_handler, device_match_serial, serial);
209 void device_handler_destroy(struct device_handler *handler)
211 talloc_free(handler);
214 static int destroy_device(void *arg)
216 struct discover_device *dev = arg;
223 struct discover_device *discover_device_create(struct device_handler *handler,
224 const char *uuid, const char *id)
226 struct discover_device *dev;
229 dev = device_lookup_by_uuid(handler, uuid);
231 dev = device_lookup_by_id(handler, id);
236 dev = talloc_zero(handler, struct discover_device);
237 dev->device = talloc_zero(dev, struct device);
238 dev->device->id = talloc_strdup(dev->device, id);
239 dev->uuid = talloc_strdup(dev, uuid);
240 list_init(&dev->params);
241 list_init(&dev->boot_options);
243 talloc_set_destructor(dev, destroy_device);
248 struct discover_device_param {
251 struct list_item list;
254 void discover_device_set_param(struct discover_device *device,
255 const char *name, const char *value)
257 struct discover_device_param *param;
260 list_for_each_entry(&device->params, param, list) {
261 if (!strcmp(param->name, name)) {
270 param = talloc(device, struct discover_device_param);
271 param->name = talloc_strdup(param, name);
272 list_add(&device->params, ¶m->list);
275 list_remove(¶m->list);
279 talloc_free(param->value);
282 param->value = talloc_strdup(param, value);
285 const char *discover_device_get_param(struct discover_device *device,
288 struct discover_device_param *param;
290 list_for_each_entry(&device->params, param, list) {
291 if (!strcmp(param->name, name))
297 struct device_handler *device_handler_init(struct discover_server *server,
298 struct waitset *waitset, int dry_run)
300 struct device_handler *handler;
303 handler = talloc_zero(NULL, struct device_handler);
304 handler->server = server;
305 handler->waitset = waitset;
306 handler->dry_run = dry_run;
307 handler->autoboot_enabled = config_get()->autoboot_enabled;
309 list_init(&handler->unresolved_boot_options);
311 /* set up our mount point base */
312 pb_mkdir_recursive(mount_base());
316 if (config_get()->safe_mode)
319 rc = device_handler_init_sources(handler);
321 talloc_free(handler);
328 void device_handler_reinit(struct device_handler *handler)
330 struct discover_boot_option *opt, *tmp;
331 struct ramdisk_device *ramdisk;
334 device_handler_cancel_default(handler);
336 /* free unresolved boot options */
337 list_for_each_entry_safe(&handler->unresolved_boot_options,
340 list_init(&handler->unresolved_boot_options);
342 /* drop all devices */
343 for (i = 0; i < handler->n_devices; i++) {
344 discover_server_notify_device_remove(handler->server,
345 handler->devices[i]->device);
346 ramdisk = handler->devices[i]->ramdisk;
347 talloc_free(handler->devices[i]);
348 talloc_free(ramdisk);
351 talloc_free(handler->devices);
352 handler->devices = NULL;
353 handler->n_devices = 0;
354 talloc_free(handler->ramdisks);
355 handler->ramdisks = NULL;
356 handler->n_ramdisks = 0;
358 device_handler_reinit_sources(handler);
361 void device_handler_remove(struct device_handler *handler,
362 struct discover_device *device)
364 struct discover_boot_option *opt, *tmp;
367 list_for_each_entry_safe(&device->boot_options, opt, tmp, list) {
368 if (opt == handler->default_boot_option) {
369 pb_log("Default option %s cancelled since device removed",
371 device_handler_cancel_default(handler);
376 for (i = 0; i < handler->n_devices; i++)
377 if (handler->devices[i] == device)
380 if (i == handler->n_devices) {
385 /* Free any unresolved options, as they're currently allocated
386 * against the handler */
387 list_for_each_entry_safe(&handler->unresolved_boot_options,
389 if (opt->device != device)
391 list_remove(&opt->list);
395 /* if this is a network device, we have to unregister it from the
397 if (device->device->type == DEVICE_TYPE_NETWORK)
398 network_unregister_device(handler->network, device);
400 handler->n_devices--;
401 memmove(&handler->devices[i], &handler->devices[i + 1],
402 (handler->n_devices - i) * sizeof(handler->devices[0]));
403 handler->devices = talloc_realloc(handler, handler->devices,
404 struct discover_device *, handler->n_devices);
406 if (device->notified)
407 discover_server_notify_device_remove(handler->server,
413 void device_handler_status(struct device_handler *handler,
414 struct status *status)
416 discover_server_notify_boot_status(handler->server, status);
419 static void _device_handler_vstatus(struct device_handler *handler,
420 enum status_type type, const char *fmt, va_list ap)
422 struct status status;
425 status.message = talloc_vasprintf(handler, fmt, ap);
427 device_handler_status(handler, &status);
429 talloc_free(status.message);
432 void device_handler_status_info(struct device_handler *handler,
433 const char *fmt, ...)
438 _device_handler_vstatus(handler, STATUS_INFO, fmt, ap);
442 void device_handler_status_err(struct device_handler *handler,
443 const char *fmt, ...)
448 _device_handler_vstatus(handler, STATUS_ERROR, fmt, ap);
452 static void device_handler_boot_status_cb(void *arg, struct status *status)
454 device_handler_status(arg, status);
457 static void countdown_status(struct device_handler *handler,
458 struct discover_boot_option *opt, unsigned int sec)
460 struct status status;
462 status.type = STATUS_INFO;
463 status.message = talloc_asprintf(handler,
464 _("Booting in %d sec: %s"), sec, opt->option->name);
466 device_handler_status(handler, &status);
468 talloc_free(status.message);
471 static int default_timeout(void *arg)
473 struct device_handler *handler = arg;
474 struct discover_boot_option *opt;
476 if (!handler->default_boot_option)
479 if (handler->pending_boot)
482 opt = handler->default_boot_option;
484 if (handler->sec_to_boot) {
485 countdown_status(handler, opt, handler->sec_to_boot);
486 handler->sec_to_boot--;
487 handler->timeout_waiter = waiter_register_timeout(
488 handler->waitset, 1000,
489 default_timeout, handler);
493 handler->timeout_waiter = NULL;
495 pb_log("Timeout expired, booting default option %s\n", opt->option->id);
499 handler->pending_boot = boot(handler, handler->default_boot_option,
500 NULL, handler->dry_run, device_handler_boot_status_cb,
502 handler->pending_boot_is_default = true;
507 enum ipmi_bootdev ipmi_type;
508 enum device_type device_type;
509 } device_type_map[] = {
510 { IPMI_BOOTDEV_NETWORK, DEVICE_TYPE_NETWORK },
511 { IPMI_BOOTDEV_DISK, DEVICE_TYPE_DISK },
512 { IPMI_BOOTDEV_DISK, DEVICE_TYPE_USB },
513 { IPMI_BOOTDEV_CDROM, DEVICE_TYPE_OPTICAL },
516 static bool ipmi_device_type_matches(enum ipmi_bootdev ipmi_type,
517 enum device_type device_type)
521 for (i = 0; i < ARRAY_SIZE(device_type_map); i++) {
522 if (device_type_map[i].device_type == device_type)
523 return device_type_map[i].ipmi_type == ipmi_type;
529 static int autoboot_option_priority(const struct config *config,
530 struct discover_boot_option *opt)
532 enum device_type type = opt->device->device->type;
533 const char *uuid = opt->device->uuid;
534 struct autoboot_option *auto_opt;
537 for (i = 0; i < config->n_autoboot_opts; i++) {
538 auto_opt = &config->autoboot_opts[i];
539 if (auto_opt->boot_type == BOOT_DEVICE_UUID)
540 if (!strcmp(auto_opt->uuid, uuid))
541 return DEFAULT_PRIORITY_LOCAL_FIRST + i;
543 if (auto_opt->boot_type == BOOT_DEVICE_TYPE)
544 if (auto_opt->type == type ||
545 auto_opt->type == DEVICE_TYPE_ANY)
546 return DEFAULT_PRIORITY_LOCAL_FIRST + i;
553 * We have different priorities to resolve conflicts between boot options that
554 * report to be the default for their device. This function assigns a priority
557 static enum default_priority default_option_priority(
558 struct discover_boot_option *opt)
560 const struct config *config;
562 config = config_get();
564 /* We give highest priority to IPMI-configured boot options. If
565 * we have an IPMI bootdev configuration set, then we don't allow
566 * any other defaults */
567 if (config->ipmi_bootdev) {
568 bool ipmi_match = ipmi_device_type_matches(config->ipmi_bootdev,
569 opt->device->device->type);
571 return DEFAULT_PRIORITY_REMOTE;
573 pb_debug("handler: disabled default priority due to "
574 "non-matching IPMI type %x\n",
575 config->ipmi_bootdev);
576 return DEFAULT_PRIORITY_DISABLED;
579 /* Next, try to match the option against the user-defined autoboot
580 * options, either by device UUID or type. */
581 if (config->n_autoboot_opts) {
582 int boot_match = autoboot_option_priority(config, opt);
587 /* If the option didn't match any entry in the array, it is disabled */
588 pb_debug("handler: disabled default priority due to "
589 "non-matching UUID or type\n");
590 return DEFAULT_PRIORITY_DISABLED;
593 static void set_default(struct device_handler *handler,
594 struct discover_boot_option *opt)
596 enum default_priority cur_prio, new_prio;
598 if (!handler->autoboot_enabled)
601 pb_debug("handler: new default option: %s\n", opt->option->id);
603 new_prio = default_option_priority(opt);
605 /* Anything outside our range prevents a default boot */
606 if (new_prio >= DEFAULT_PRIORITY_DISABLED)
609 pb_debug("handler: calculated priority %d\n", new_prio);
611 /* Resolve any conflicts: if we have a new default option, it only
612 * replaces the current if it has a higher priority. */
613 if (handler->default_boot_option) {
615 cur_prio = handler->default_boot_option_priority;
617 if (new_prio < cur_prio) {
618 pb_log("handler: new prio %d beats "
619 "old prio %d for %s\n",
621 handler->default_boot_option
623 handler->default_boot_option = opt;
624 handler->default_boot_option_priority = new_prio;
625 /* extend the timeout a little, so the user sees some
626 * indication of the change */
627 handler->sec_to_boot += 2;
633 handler->sec_to_boot = config_get()->autoboot_timeout_sec;
634 handler->default_boot_option = opt;
635 handler->default_boot_option_priority = new_prio;
637 pb_log("handler: boot option %s set as default, timeout %u sec.\n",
638 opt->option->id, handler->sec_to_boot);
640 default_timeout(handler);
643 static bool resource_is_resolved(struct resource *res)
645 return !res || res->resolved;
648 /* We only use this in an assert, which will disappear if we're compiling
649 * with NDEBUG, so we need the 'used' attribute for these builds */
650 static bool __attribute__((used)) boot_option_is_resolved(
651 struct discover_boot_option *opt)
653 return resource_is_resolved(opt->boot_image) &&
654 resource_is_resolved(opt->initrd) &&
655 resource_is_resolved(opt->dtb) &&
656 resource_is_resolved(opt->args_sig_file) &&
657 resource_is_resolved(opt->icon);
660 static bool resource_resolve(struct resource *res, const char *name,
661 struct discover_boot_option *opt,
662 struct device_handler *handler)
664 struct parser *parser = opt->source;
666 if (resource_is_resolved(res))
669 pb_debug("Attempting to resolve resource %s->%s with parser %s\n",
670 opt->option->id, name, parser->name);
671 parser->resolve_resource(handler, res);
673 return res->resolved;
676 static bool boot_option_resolve(struct discover_boot_option *opt,
677 struct device_handler *handler)
679 return resource_resolve(opt->boot_image, "boot_image", opt, handler) &&
680 resource_resolve(opt->initrd, "initrd", opt, handler) &&
681 resource_resolve(opt->dtb, "dtb", opt, handler) &&
682 resource_resolve(opt->args_sig_file, "args_sig_file", opt,
684 resource_resolve(opt->icon, "icon", opt, handler);
687 static void boot_option_finalise(struct device_handler *handler,
688 struct discover_boot_option *opt)
690 assert(boot_option_is_resolved(opt));
692 /* check that the parsers haven't set any of the final data */
693 assert(!opt->option->boot_image_file);
694 assert(!opt->option->initrd_file);
695 assert(!opt->option->dtb_file);
696 assert(!opt->option->icon_file);
697 assert(!opt->option->device_id);
698 assert(!opt->option->args_sig_file);
701 opt->option->boot_image_file = opt->boot_image->url->full;
703 opt->option->initrd_file = opt->initrd->url->full;
705 opt->option->dtb_file = opt->dtb->url->full;
707 opt->option->icon_file = opt->icon->url->full;
708 if (opt->args_sig_file)
709 opt->option->args_sig_file = opt->args_sig_file->url->full;
711 opt->option->device_id = opt->device->device->id;
713 if (opt->option->is_default)
714 set_default(handler, opt);
717 static void notify_boot_option(struct device_handler *handler,
718 struct discover_boot_option *opt)
720 struct discover_device *dev = opt->device;
723 discover_server_notify_device_add(handler->server,
724 opt->device->device);
725 dev->notified = true;
726 discover_server_notify_boot_option_add(handler->server, opt->option);
729 static void process_boot_option_queue(struct device_handler *handler)
731 struct discover_boot_option *opt, *tmp;
733 list_for_each_entry_safe(&handler->unresolved_boot_options,
736 pb_debug("queue: attempting resolution for %s\n",
739 if (!boot_option_resolve(opt, handler))
742 pb_debug("\tresolved!\n");
744 list_remove(&opt->list);
745 list_add_tail(&opt->device->boot_options, &opt->list);
746 talloc_steal(opt->device, opt);
747 boot_option_finalise(handler, opt);
748 notify_boot_option(handler, opt);
752 struct discover_context *device_handler_discover_context_create(
753 struct device_handler *handler,
754 struct discover_device *device)
756 struct discover_context *ctx;
758 ctx = talloc_zero(handler, struct discover_context);
759 ctx->device = device;
760 ctx->network = handler->network;
761 list_init(&ctx->boot_options);
766 void device_handler_add_device(struct device_handler *handler,
767 struct discover_device *device)
769 handler->n_devices++;
770 handler->devices = talloc_realloc(handler, handler->devices,
771 struct discover_device *, handler->n_devices);
772 handler->devices[handler->n_devices - 1] = device;
774 if (device->device->type == DEVICE_TYPE_NETWORK)
775 network_register_device(handler->network, device);
778 void device_handler_add_ramdisk(struct device_handler *handler,
781 struct ramdisk_device *dev;
787 for (i = 0; i < handler->n_ramdisks; i++)
788 if (!strcmp(handler->ramdisks[i]->path, path))
791 dev = talloc_zero(handler, struct ramdisk_device);
793 pb_log("Failed to allocate memory to track %s\n", path);
797 dev->path = talloc_strdup(handler, path);
799 handler->ramdisks = talloc_realloc(handler, handler->ramdisks,
800 struct ramdisk_device *,
801 handler->n_ramdisks + 1);
802 if (!handler->ramdisks) {
803 pb_log("Failed to reallocate memory"
804 "- ramdisk tracking inconsistent!\n");
808 handler->ramdisks[i] = dev;
809 i = handler->n_ramdisks++;
812 struct ramdisk_device *device_handler_get_ramdisk(
813 struct device_handler *handler)
819 /* Check if free ramdisk exists */
820 for (i = 0; i < handler->n_ramdisks; i++)
821 if (!handler->ramdisks[i]->snapshot &&
822 !handler->ramdisks[i]->origin &&
823 !handler->ramdisks[i]->base)
824 return handler->ramdisks[i];
826 /* Otherwise create a new one */
827 name = talloc_asprintf(handler, "/dev/ram%d",
828 handler->n_ramdisks);
830 pb_debug("Failed to allocate memory to name /dev/ram%d",
831 handler->n_ramdisks);
835 id = makedev(1, handler->n_ramdisks);
836 if (mknod(name, S_IFBLK, id)) {
837 if (errno == EEXIST) {
838 /* We haven't yet received updates for existing
839 * ramdisks - add and use this one */
840 pb_debug("Using untracked ramdisk %s\n", name);
842 pb_log("Failed to create new ramdisk %s: %s\n",
843 name, strerror(errno));
847 device_handler_add_ramdisk(handler, name);
850 return handler->ramdisks[i];
853 void device_handler_release_ramdisk(struct discover_device *device)
855 struct ramdisk_device *ramdisk = device->ramdisk;
857 talloc_free(ramdisk->snapshot);
858 talloc_free(ramdisk->origin);
859 talloc_free(ramdisk->base);
861 ramdisk->snapshot = ramdisk->origin = ramdisk->base = NULL;
862 ramdisk->sectors = 0;
864 device->ramdisk = NULL;
867 /* Start discovery on a hotplugged device. The device will be in our devices
868 * array, but has only just been initialised by the hotplug source.
870 int device_handler_discover(struct device_handler *handler,
871 struct discover_device *dev)
873 struct discover_context *ctx;
877 * TRANSLATORS: this string will be passed the type and identifier
878 * of the device. For example, the first parameter could be "Disk",
879 * (which will be translated accordingly) and the second a Linux device
880 * identifier like 'sda1' (which will not be translated)
882 device_handler_status_info(handler, _("Processing %s device %s"),
883 device_type_display_name(dev->device->type),
886 process_boot_option_queue(handler);
888 /* create our context */
889 ctx = device_handler_discover_context_create(handler, dev);
891 rc = mount_device(dev);
895 /* add this device to our system info */
896 system_info_register_blockdev(dev->device->id, dev->uuid,
899 /* run the parsers. This will populate the ctx's boot_option list. */
900 iterate_parsers(ctx);
902 /* add discovered stuff to the handler */
903 device_handler_discover_context_commit(handler, ctx);
907 * TRANSLATORS: the format specifier in this string is a Linux
908 * device identifier, like 'sda1'
910 device_handler_status_info(handler, _("Processing %s complete"),
913 talloc_unlink(handler, ctx);
918 /* Incoming dhcp event */
919 int device_handler_dhcp(struct device_handler *handler,
920 struct discover_device *dev, struct event *event)
922 struct discover_context *ctx;
925 * TRANSLATORS: this format specifier will be the name of a network
926 * device, like 'eth0'.
928 device_handler_status_info(handler, _("Processing dhcp event on %s"),
931 /* create our context */
932 ctx = device_handler_discover_context_create(handler, dev);
933 talloc_steal(ctx, event);
936 iterate_parsers(ctx);
938 device_handler_discover_context_commit(handler, ctx);
941 * TRANSLATORS: this format specifier will be the name of a network
942 * device, like 'eth0'.
944 device_handler_status_info(handler, _("Processing %s complete"),
947 talloc_unlink(handler, ctx);
952 static struct discover_boot_option *find_boot_option_by_id(
953 struct device_handler *handler, const char *id)
957 for (i = 0; i < handler->n_devices; i++) {
958 struct discover_device *dev = handler->devices[i];
959 struct discover_boot_option *opt;
961 list_for_each_entry(&dev->boot_options, opt, list)
962 if (!strcmp(opt->option->id, id))
969 void device_handler_boot(struct device_handler *handler,
970 struct boot_command *cmd)
972 struct discover_boot_option *opt = NULL;
974 if (cmd->option_id && strlen(cmd->option_id))
975 opt = find_boot_option_by_id(handler, cmd->option_id);
977 if (handler->pending_boot)
978 boot_cancel(handler->pending_boot);
982 handler->pending_boot = boot(handler, opt, cmd, handler->dry_run,
983 device_handler_boot_status_cb, handler);
984 handler->pending_boot_is_default = false;
987 void device_handler_cancel_default(struct device_handler *handler)
989 if (handler->timeout_waiter)
990 waiter_remove(handler->timeout_waiter);
992 handler->timeout_waiter = NULL;
993 handler->autoboot_enabled = false;
995 /* we only send status if we had a default boot option queued */
996 if (!handler->default_boot_option)
999 pb_log("Cancelling default boot option\n");
1001 if (handler->pending_boot && handler->pending_boot_is_default) {
1002 boot_cancel(handler->pending_boot);
1003 handler->pending_boot = NULL;
1004 handler->pending_boot_is_default = false;
1007 handler->default_boot_option = NULL;
1009 device_handler_status_info(handler, _("Default boot cancelled"));
1012 void device_handler_update_config(struct device_handler *handler,
1013 struct config *config)
1017 rc = config_set(config);
1021 discover_server_notify_config(handler->server, config);
1022 device_handler_update_lang(config->lang);
1023 device_handler_reinit(handler);
1026 static char *device_from_addr(void *ctx, struct pb_url *url)
1028 char *ipaddr, *buf, *tok, *dev = NULL;
1029 const char *delim = " ";
1030 struct sockaddr_in *ip;
1031 struct sockaddr_in si;
1032 struct addrinfo *res;
1036 /* Note: IPv4 only */
1037 rc = inet_pton(AF_INET, url->host, &(si.sin_addr));
1041 /* need to turn hostname into a valid IP */
1042 rc = getaddrinfo(url->host, NULL, NULL, &res);
1044 pb_debug("%s: Invalid URL\n",__func__);
1047 ipaddr = talloc_array(ctx,char,INET_ADDRSTRLEN);
1048 ip = (struct sockaddr_in *) res->ai_addr;
1049 inet_ntop(AF_INET, &(ip->sin_addr), ipaddr, INET_ADDRSTRLEN);
1053 const char *argv[] = {
1055 "route", "show", "to", "match",
1060 p = process_create(ctx);
1062 p->path = pb_system_apps.ip;
1064 p->keep_stdout = true;
1066 rc = process_run_sync(p);
1068 if (rc || p->exit_status) {
1069 /* ip has complained for some reason; most likely
1070 * there is no route to the host - bail out */
1071 pb_debug("%s: `ip` returns non-zero exit status\n", __func__);
1072 pb_debug("ip buf: %s\n", p->stdout_buf);
1077 buf = p->stdout_buf;
1078 /* If a route is found, ip-route output will be of the form
1079 * "... dev DEVNAME ... " */
1080 tok = strtok(buf, delim);
1082 if (!strcmp(tok, "dev")) {
1083 tok = strtok(NULL, delim);
1084 dev = talloc_strdup(ctx, tok);
1087 tok = strtok(NULL, delim);
1092 pb_debug("%s: Found interface '%s'\n", __func__,dev);
1096 void device_handler_process_url(struct device_handler *handler,
1097 const char *url, const char *mac, const char *ip)
1099 struct discover_context *ctx;
1100 struct discover_device *dev;
1101 struct pb_url *pb_url;
1102 struct event *event;
1103 struct param *param;
1105 if (!handler->network) {
1106 device_handler_status_err(handler, _("No network configured"));
1110 event = talloc(handler, struct event);
1111 event->type = EVENT_TYPE_USER;
1112 event->action = EVENT_ACTION_URL;
1114 if (url[strlen(url) - 1] == '/') {
1115 event->params = talloc_array(event, struct param, 3);
1116 param = &event->params[0];
1117 param->name = talloc_strdup(event, "pxepathprefix");
1118 param->value = talloc_strdup(event, url);
1119 param = &event->params[1];
1120 param->name = talloc_strdup(event, "mac");
1121 param->value = talloc_strdup(event, mac);
1122 param = &event->params[2];
1123 param->name = talloc_strdup(event, "ip");
1124 param->value = talloc_strdup(event, ip);
1125 event->n_params = 3;
1127 event->params = talloc_array(event, struct param, 1);
1128 param = &event->params[0];
1129 param->name = talloc_strdup(event, "pxeconffile");
1130 param->value = talloc_strdup(event, url);
1131 event->n_params = 1;
1134 pb_url = pb_url_parse(event, event->params->value);
1135 if (!pb_url || (pb_url->scheme != pb_url_file && !pb_url->host)) {
1136 device_handler_status_err(handler, _("Invalid config URL!"));
1140 if (pb_url->scheme == pb_url_file)
1141 event->device = talloc_asprintf(event, "local");
1143 event->device = device_from_addr(event, pb_url);
1145 if (!event->device) {
1146 device_handler_status_err(handler,
1147 _("Unable to route to host %s"),
1152 dev = discover_device_create(handler, mac, event->device);
1153 if (pb_url->scheme == pb_url_file)
1154 dev->device->type = DEVICE_TYPE_ANY;
1155 ctx = device_handler_discover_context_create(handler, dev);
1156 talloc_steal(ctx, event);
1159 iterate_parsers(ctx);
1161 device_handler_discover_context_commit(handler, ctx);
1163 talloc_unlink(handler, ctx);
1166 #ifndef PETITBOOT_TEST
1169 * context_commit - Commit a temporary discovery context to the handler,
1170 * and notify the clients about any new options / devices
1172 void device_handler_discover_context_commit(struct device_handler *handler,
1173 struct discover_context *ctx)
1175 struct discover_device *dev = ctx->device;
1176 struct discover_boot_option *opt, *tmp;
1178 if (!device_lookup_by_uuid(handler, dev->uuid))
1179 device_handler_add_device(handler, dev);
1181 /* move boot options from the context to the device */
1182 list_for_each_entry_safe(&ctx->boot_options, opt, tmp, list) {
1183 list_remove(&opt->list);
1185 /* All boot options need at least a kernel image */
1186 if (!opt->boot_image || !opt->boot_image->url) {
1187 pb_log("boot option %s is missing boot image, ignoring\n",
1193 if (boot_option_resolve(opt, handler)) {
1194 pb_log("boot option %s is resolved, "
1195 "sending to clients\n",
1197 list_add_tail(&dev->boot_options, &opt->list);
1198 talloc_steal(dev, opt);
1199 boot_option_finalise(handler, opt);
1200 notify_boot_option(handler, opt);
1202 if (!opt->source->resolve_resource) {
1203 pb_log("parser %s gave us an unresolved "
1204 "resource (%s), but no way to "
1206 opt->source->name, opt->option->id);
1209 pb_log("boot option %s is unresolved, "
1210 "adding to queue\n",
1212 list_add(&handler->unresolved_boot_options,
1214 talloc_steal(handler, opt);
1220 static void device_handler_update_lang(const char *lang)
1222 const char *cur_lang;
1227 cur_lang = setlocale(LC_ALL, NULL);
1228 if (cur_lang && !strcmp(cur_lang, lang))
1231 setlocale(LC_ALL, lang);
1234 static int device_handler_init_sources(struct device_handler *handler)
1236 /* init our device sources: udev, network and user events */
1237 handler->udev = udev_init(handler, handler->waitset);
1241 handler->network = network_init(handler, handler->waitset,
1243 if (!handler->network)
1246 handler->user_event = user_event_init(handler, handler->waitset);
1247 if (!handler->user_event)
1253 static void device_handler_reinit_sources(struct device_handler *handler)
1255 /* if we haven't initialised sources previously (becuase we started in
1256 * safe mode), then init once here. */
1257 if (!(handler->udev || handler->network || handler->user_event)) {
1258 device_handler_init_sources(handler);
1262 udev_reinit(handler->udev);
1264 network_shutdown(handler->network);
1265 handler->network = network_init(handler, handler->waitset,
1269 static inline const char *get_device_path(struct discover_device *dev)
1271 return dev->ramdisk ? dev->ramdisk->snapshot : dev->device_path;
1274 static char *check_subvols(struct discover_device *dev)
1276 const char *fstype = discover_device_get_param(dev, "ID_FS_TYPE");
1281 if (strncmp(fstype, "btrfs", strlen("btrfs")))
1282 return dev->mount_path;
1284 /* On btrfs a device's root may be under a subvolume path */
1285 path = join_paths(dev, dev->mount_path, "@");
1286 rc = stat(path, &sb);
1287 if (!rc && S_ISDIR(sb.st_mode)) {
1288 pb_debug("Using '%s' for btrfs root path\n", path);
1293 return dev->mount_path;
1296 static bool check_existing_mount(struct discover_device *dev)
1298 struct stat devstat, mntstat;
1299 const char *device_path;
1304 device_path = get_device_path(dev);
1306 rc = stat(device_path, &devstat);
1308 pb_debug("%s: stat failed: %s\n", __func__, strerror(errno));
1312 if (!S_ISBLK(devstat.st_mode)) {
1313 pb_debug("%s: %s isn't a block device?\n", __func__,
1318 fp = fopen("/proc/self/mounts", "r");
1321 mnt = getmntent(fp);
1325 if (!mnt->mnt_fsname || mnt->mnt_fsname[0] != '/')
1328 rc = stat(mnt->mnt_fsname, &mntstat);
1332 if (!S_ISBLK(mntstat.st_mode))
1335 if (mntstat.st_rdev == devstat.st_rdev) {
1336 dev->mount_path = talloc_strdup(dev, mnt->mnt_dir);
1337 dev->root_path = check_subvols(dev);
1338 dev->mounted_rw = !!hasmntopt(mnt, "rw");
1339 dev->mounted = true;
1340 dev->unmount = false;
1342 pb_debug("%s: %s is already mounted (r%c) at %s\n",
1343 __func__, dev->device_path,
1344 dev->mounted_rw ? 'w' : 'o',
1356 * Attempt to mount a filesystem safely, while handling certain filesytem-
1359 static int try_mount(const char *device_path, const char *mount_path,
1360 const char *fstype, unsigned long flags,
1363 const char *fs, *safe_opts;
1366 /* Mount ext3 as ext4 instead so 'norecovery' can be used */
1367 if (strncmp(fstype, "ext3", strlen("ext3")) == 0) {
1368 pb_debug("Mounting ext3 filesystem as ext4\n");
1373 if (strncmp(fs, "xfs", strlen("xfs")) == 0 ||
1374 strncmp(fs, "ext4", strlen("ext4")) == 0)
1375 safe_opts = "norecovery";
1380 /* If no snapshot is available don't attempt recovery */
1382 return mount(device_path, mount_path, fs, flags, safe_opts);
1384 rc = mount(device_path, mount_path, fs, flags, NULL);
1389 /* Mounting failed; some filesystems will fail to mount if a recovery
1390 * journal exists (eg. cross-endian XFS), so try again with norecovery
1391 * where that option is available.
1392 * If mounting read-write just return the error as norecovery is not a
1394 if ((flags & MS_RDONLY) != MS_RDONLY || !safe_opts)
1398 return mount(device_path, mount_path, fs, flags, safe_opts);
1401 static int mount_device(struct discover_device *dev)
1403 const char *fstype, *device_path;
1406 if (!dev->device_path)
1412 if (check_existing_mount(dev))
1415 fstype = discover_device_get_param(dev, "ID_FS_TYPE");
1419 dev->mount_path = join_paths(dev, mount_base(),
1422 if (pb_mkdir_recursive(dev->mount_path)) {
1423 pb_log("couldn't create mount directory %s: %s\n",
1424 dev->mount_path, strerror(errno));
1428 device_path = get_device_path(dev);
1430 pb_log("mounting device %s read-only\n", dev->device_path);
1431 rc = try_mount(device_path, dev->mount_path, fstype,
1432 MS_RDONLY | MS_SILENT, dev->ramdisk);
1435 dev->mounted = true;
1436 dev->mounted_rw = false;
1437 dev->unmount = true;
1438 dev->root_path = check_subvols(dev);
1442 pb_log("couldn't mount device %s: mount failed: %s\n",
1443 device_path, strerror(errno));
1445 /* If mount fails clean up any snapshot */
1446 devmapper_destroy_snapshot(dev);
1448 pb_rmdir_recursive(mount_base(), dev->mount_path);
1450 talloc_free(dev->mount_path);
1451 dev->mount_path = NULL;
1455 static int umount_device(struct discover_device *dev)
1457 const char *device_path;
1460 if (!dev->mounted || !dev->unmount)
1463 device_path = get_device_path(dev);
1465 pb_log("unmounting device %s\n", device_path);
1466 rc = umount(dev->mount_path);
1470 dev->mounted = false;
1471 devmapper_destroy_snapshot(dev);
1473 pb_rmdir_recursive(mount_base(), dev->mount_path);
1475 talloc_free(dev->mount_path);
1476 dev->mount_path = NULL;
1477 dev->root_path = NULL;
1482 int device_request_write(struct discover_device *dev, bool *release)
1484 const char *fstype, *device_path;
1485 const struct config *config;
1490 config = config_get();
1491 if (!config->allow_writes)
1497 if (dev->mounted_rw)
1500 fstype = discover_device_get_param(dev, "ID_FS_TYPE");
1502 device_path = get_device_path(dev);
1504 pb_log("remounting device %s read-write\n", device_path);
1506 rc = umount(dev->mount_path);
1508 pb_log("Failed to unmount %s: %s\n",
1509 dev->mount_path, strerror(errno));
1513 rc = try_mount(device_path, dev->mount_path, fstype,
1514 MS_SILENT, dev->ramdisk);
1518 dev->mounted_rw = true;
1523 pb_log("Unable to remount device %s read-write: %s\n",
1524 device_path, strerror(errno));
1525 rc = try_mount(device_path, dev->mount_path, fstype,
1526 MS_RDONLY | MS_SILENT, dev->ramdisk);
1528 pb_log("Unable to recover mount for %s: %s\n",
1529 device_path, strerror(errno));
1533 void device_release_write(struct discover_device *dev, bool release)
1535 const char *fstype, *device_path;
1540 device_path = get_device_path(dev);
1542 fstype = discover_device_get_param(dev, "ID_FS_TYPE");
1544 pb_log("remounting device %s read-only\n", device_path);
1546 if (umount(dev->mount_path)) {
1547 pb_log("Failed to unmount %s\n", dev->mount_path);
1550 dev->mounted_rw = dev->mounted = false;
1553 devmapper_merge_snapshot(dev);
1554 /* device_path becomes stale after merge */
1555 device_path = get_device_path(dev);
1558 if (try_mount(device_path, dev->mount_path, fstype,
1559 MS_RDONLY | MS_SILENT, dev->ramdisk))
1560 pb_log("Failed to remount %s read-only: %s\n",
1561 device_path, strerror(errno));
1563 dev->mounted = true;
1566 void device_sync_snapshots(struct device_handler *handler, const char *device)
1568 struct discover_device *dev = NULL;
1572 /* Find matching device and sync */
1573 dev = device_lookup_by_name(handler, device);
1575 pb_log("%s: device name '%s' unrecognised\n",
1580 device_release_write(dev, true);
1582 pb_log("%s has no snapshot to merge, skipping\n",
1587 /* Otherwise sync all relevant devices */
1588 for (i = 0; i < handler->n_devices; i++) {
1589 dev = handler->devices[i];
1590 if (dev->device->type != DEVICE_TYPE_DISK &&
1591 dev->device->type != DEVICE_TYPE_USB)
1594 device_release_write(dev, true);
1596 pb_log("%s has no snapshot to merge, skipping\n",
1603 void device_handler_discover_context_commit(
1604 struct device_handler *handler __attribute__((unused)),
1605 struct discover_context *ctx __attribute__((unused)))
1607 pb_log("%s stubbed out for test cases\n", __func__);
1610 static void device_handler_update_lang(const char *lang __attribute__((unused)))
1614 static int device_handler_init_sources(
1615 struct device_handler *handler __attribute__((unused)))
1620 static void device_handler_reinit_sources(
1621 struct device_handler *handler __attribute__((unused)))
1625 static int umount_device(struct discover_device *dev __attribute__((unused)))
1630 static int __attribute__((unused)) mount_device(
1631 struct discover_device *dev __attribute__((unused)))
1636 int device_request_write(struct discover_device *dev __attribute__((unused)),
1643 void device_release_write(struct discover_device *dev __attribute__((unused)),
1644 bool release __attribute__((unused)))
1648 void device_sync_snapshots(
1649 struct device_handler *handler __attribute__((unused)),
1650 const char *device __attribute__((unused)))