1 /*
2 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer in the documentation and/or other materials provided
12 * with the distribution.
13 * * Neither the name of The Linux Foundation nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 #include <map>
30 #include <list>
31 #include <string>
32 #include <vector>
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 #include <errno.h>
37 #define LOG_TAG "bootcontrolhal"
38 #include <log/log.h>
39 #include <hardware/boot_control.h>
40 #include <stdio.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <dirent.h>
44 #include <sys/types.h>
45 #include <sys/stat.h>
46 #include <fcntl.h>
47 #include <limits.h>
48 #include <cutils/properties.h>
49 #include "gpt-utils.h"
50
51 #define BOOTDEV_DIR "/dev/block/bootdevice/by-name"
52 #define BOOT_IMG_PTN_NAME "boot_"
53 #define LUN_NAME_END_LOC 14
54 #define BOOT_SLOT_PROP "ro.boot.slot_suffix"
55
56 #define SLOT_ACTIVE 1
57 #define SLOT_INACTIVE 2
58 #define UPDATE_SLOT(pentry, guid, slot_state) ({ \
59 memcpy(pentry, guid, TYPE_GUID_SIZE); \
60 if (slot_state == SLOT_ACTIVE)\
61 *(pentry + AB_FLAG_OFFSET) = AB_SLOT_ACTIVE_VAL; \
62 else if (slot_state == SLOT_INACTIVE) \
63 *(pentry + AB_FLAG_OFFSET) = (*(pentry + AB_FLAG_OFFSET)& \
64 ~AB_PARTITION_ATTR_SLOT_ACTIVE); \
65 })
66
67 using namespace std;
68 const char *slot_suffix_arr[] = {
69 AB_SLOT_A_SUFFIX,
70 AB_SLOT_B_SUFFIX,
71 NULL};
72
73 enum part_attr_type {
74 ATTR_SLOT_ACTIVE = 0,
75 ATTR_BOOT_SUCCESSFUL,
76 ATTR_UNBOOTABLE,
77 };
78
boot_control_init(struct boot_control_module * module)79 void boot_control_init(struct boot_control_module *module)
80 {
81 if (!module) {
82 ALOGE("Invalid argument passed to %s", __func__);
83 return;
84 }
85 return;
86 }
87
88 //Get the value of one of the attribute fields for a partition.
get_partition_attribute(char * partname,enum part_attr_type part_attr)89 static int get_partition_attribute(char *partname,
90 enum part_attr_type part_attr)
91 {
92 struct gpt_disk *disk = NULL;
93 uint8_t *pentry = NULL;
94 int retval = -1;
95 uint8_t *attr = NULL;
96 if (!partname)
97 goto error;
98 disk = gpt_disk_alloc();
99 if (!disk) {
100 ALOGE("%s: Failed to alloc disk struct", __func__);
101 goto error;
102 }
103 if (gpt_disk_get_disk_info(partname, disk)) {
104 ALOGE("%s: Failed to get disk info", __func__);
105 goto error;
106 }
107 pentry = gpt_disk_get_pentry(disk, partname, PRIMARY_GPT);
108 if (!pentry) {
109 ALOGE("%s: pentry does not exist in disk struct",
110 __func__);
111 goto error;
112 }
113 attr = pentry + AB_FLAG_OFFSET;
114 if (part_attr == ATTR_SLOT_ACTIVE)
115 retval = !!(*attr & AB_PARTITION_ATTR_SLOT_ACTIVE);
116 else if (part_attr == ATTR_BOOT_SUCCESSFUL)
117 retval = !!(*attr & AB_PARTITION_ATTR_BOOT_SUCCESSFUL);
118 else if (part_attr == ATTR_UNBOOTABLE)
119 retval = !!(*attr & AB_PARTITION_ATTR_UNBOOTABLE);
120 else
121 retval = -1;
122 gpt_disk_free(disk);
123 return retval;
124 error:
125 if (disk)
126 gpt_disk_free(disk);
127 return retval;
128 }
129
130 //Set a particular attribute for all the partitions in a
131 //slot
update_slot_attribute(const char * slot,enum part_attr_type ab_attr)132 static int update_slot_attribute(const char *slot,
133 enum part_attr_type ab_attr)
134 {
135 unsigned int i = 0;
136 char buf[PATH_MAX];
137 struct stat st;
138 struct gpt_disk *disk = NULL;
139 uint8_t *pentry = NULL;
140 uint8_t *pentry_bak = NULL;
141 int rc = -1;
142 uint8_t *attr = NULL;
143 uint8_t *attr_bak = NULL;
144 char partName[MAX_GPT_NAME_SIZE + 1] = {0};
145 const char ptn_list[][MAX_GPT_NAME_SIZE] = { AB_PTN_LIST };
146 int slot_name_valid = 0;
147 if (!slot) {
148 ALOGE("%s: Invalid argument", __func__);
149 goto error;
150 }
151 for (i = 0; slot_suffix_arr[i] != NULL; i++)
152 {
153 if (!strncmp(slot, slot_suffix_arr[i],
154 strlen(slot_suffix_arr[i])))
155 slot_name_valid = 1;
156 }
157 if (!slot_name_valid) {
158 ALOGE("%s: Invalid slot name", __func__);
159 goto error;
160 }
161 for (i=0; i < ARRAY_SIZE(ptn_list); i++) {
162 memset(buf, '\0', sizeof(buf));
163 //Check if A/B versions of this ptn exist
164 snprintf(buf, sizeof(buf) - 1,
165 "%s/%s%s",
166 BOOT_DEV_DIR,
167 ptn_list[i],
168 AB_SLOT_A_SUFFIX
169 );
170 if (stat(buf, &st)) {
171 //partition does not have _a version
172 continue;
173 }
174 memset(buf, '\0', sizeof(buf));
175 snprintf(buf, sizeof(buf) - 1,
176 "%s/%s%s",
177 BOOT_DEV_DIR,
178 ptn_list[i],
179 AB_SLOT_B_SUFFIX
180 );
181 if (stat(buf, &st)) {
182 //partition does not have _a version
183 continue;
184 }
185 memset(partName, '\0', sizeof(partName));
186 snprintf(partName,
187 sizeof(partName) - 1,
188 "%s%s",
189 ptn_list[i],
190 slot);
191 disk = gpt_disk_alloc();
192 if (!disk) {
193 ALOGE("%s: Failed to alloc disk struct",
194 __func__);
195 goto error;
196 }
197 rc = gpt_disk_get_disk_info(partName, disk);
198 if (rc != 0) {
199 ALOGE("%s: Failed to get disk info for %s",
200 __func__,
201 partName);
202 goto error;
203 }
204 pentry = gpt_disk_get_pentry(disk, partName, PRIMARY_GPT);
205 pentry_bak = gpt_disk_get_pentry(disk, partName, SECONDARY_GPT);
206 if (!pentry || !pentry_bak) {
207 ALOGE("%s: Failed to get pentry/pentry_bak for %s",
208 __func__,
209 partName);
210 goto error;
211 }
212 attr = pentry + AB_FLAG_OFFSET;
213 attr_bak = pentry_bak + AB_FLAG_OFFSET;
214 if (ab_attr == ATTR_BOOT_SUCCESSFUL) {
215 *attr = (*attr) | AB_PARTITION_ATTR_BOOT_SUCCESSFUL;
216 *attr_bak = (*attr_bak) |
217 AB_PARTITION_ATTR_BOOT_SUCCESSFUL;
218 } else if (ab_attr == ATTR_UNBOOTABLE) {
219 *attr = (*attr) | AB_PARTITION_ATTR_UNBOOTABLE;
220 *attr_bak = (*attr_bak) | AB_PARTITION_ATTR_UNBOOTABLE;
221 } else if (ab_attr == ATTR_SLOT_ACTIVE) {
222 *attr = (*attr) | AB_PARTITION_ATTR_SLOT_ACTIVE;
223 *attr_bak = (*attr) | AB_PARTITION_ATTR_SLOT_ACTIVE;
224 } else {
225 ALOGE("%s: Unrecognized attr", __func__);
226 goto error;
227 }
228 if (gpt_disk_update_crc(disk)) {
229 ALOGE("%s: Failed to update crc for %s",
230 __func__,
231 partName);
232 goto error;
233 }
234 if (gpt_disk_commit(disk)) {
235 ALOGE("%s: Failed to write back entry for %s",
236 __func__,
237 partName);
238 goto error;
239 }
240 gpt_disk_free(disk);
241 disk = NULL;
242 }
243 return 0;
244 error:
245 if (disk)
246 gpt_disk_free(disk);
247 return -1;
248 }
249
get_number_slots(struct boot_control_module * module)250 unsigned get_number_slots(struct boot_control_module *module)
251 {
252 struct dirent *de = NULL;
253 DIR *dir_bootdev = NULL;
254 unsigned slot_count = 0;
255 if (!module) {
256 ALOGE("%s: Invalid argument", __func__);
257 goto error;
258 }
259 dir_bootdev = opendir(BOOTDEV_DIR);
260 if (!dir_bootdev) {
261 ALOGE("%s: Failed to open bootdev dir (%s)",
262 __func__,
263 strerror(errno));
264 goto error;
265 }
266 while ((de = readdir(dir_bootdev))) {
267 if (de->d_name[0] == '.')
268 continue;
269 static_assert(AB_SLOT_A_SUFFIX[0] == '_', "Breaking change to slot A suffix");
270 static_assert(AB_SLOT_B_SUFFIX[0] == '_', "Breaking change to slot B suffix");
271 if (!strncmp(de->d_name, BOOT_IMG_PTN_NAME,
272 strlen(BOOT_IMG_PTN_NAME)))
273 slot_count++;
274 }
275 closedir(dir_bootdev);
276 return slot_count;
277 error:
278 if (dir_bootdev)
279 closedir(dir_bootdev);
280 return 0;
281 }
282
get_current_slot(struct boot_control_module * module)283 unsigned get_current_slot(struct boot_control_module *module)
284 {
285 uint32_t num_slots = 0;
286 char bootSlotProp[PROPERTY_VALUE_MAX] = {'\0'};
287 unsigned i = 0;
288 if (!module) {
289 ALOGE("%s: Invalid argument", __func__);
290 goto error;
291 }
292 num_slots = get_number_slots(module);
293 if (num_slots <= 1) {
294 //Slot 0 is the only slot around.
295 return 0;
296 }
297 property_get(BOOT_SLOT_PROP, bootSlotProp, "N/A");
298 if (!strncmp(bootSlotProp, "N/A", strlen("N/A"))) {
299 ALOGE("%s: Unable to read boot slot property",
300 __func__);
301 goto error;
302 }
303 //Iterate through a list of partitons named as boot+suffix
304 //and see which one is currently active.
305 for (i = 0; slot_suffix_arr[i] != NULL ; i++) {
306 if (!strncmp(bootSlotProp,
307 slot_suffix_arr[i],
308 strlen(slot_suffix_arr[i])))
309 return i;
310 }
311 error:
312 //The HAL spec requires that we return a number between
313 //0 to num_slots - 1. Since something went wrong here we
314 //are just going to return the default slot.
315 return 0;
316 }
317
boot_control_check_slot_sanity(struct boot_control_module * module,unsigned slot)318 static int boot_control_check_slot_sanity(struct boot_control_module *module,
319 unsigned slot)
320 {
321 if (!module)
322 return -1;
323 uint32_t num_slots = get_number_slots(module);
324 if ((num_slots < 1) || (slot > num_slots - 1)) {
325 ALOGE("Invalid slot number");
326 return -1;
327 }
328 return 0;
329
330 }
331
mark_boot_successful(struct boot_control_module * module)332 int mark_boot_successful(struct boot_control_module *module)
333 {
334 unsigned cur_slot = 0;
335 if (!module) {
336 ALOGE("%s: Invalid argument", __func__);
337 goto error;
338 }
339 cur_slot = get_current_slot(module);
340 if (update_slot_attribute(slot_suffix_arr[cur_slot],
341 ATTR_BOOT_SUCCESSFUL)) {
342 goto error;
343 }
344 return 0;
345 error:
346 ALOGE("%s: Failed to mark boot successful", __func__);
347 return -1;
348 }
349
get_suffix(struct boot_control_module * module,unsigned slot)350 const char *get_suffix(struct boot_control_module *module, unsigned slot)
351 {
352 if (boot_control_check_slot_sanity(module, slot) != 0)
353 return NULL;
354 else
355 return slot_suffix_arr[slot];
356 }
357
358
359 //Return a gpt disk structure representing the disk that holds
360 //partition.
boot_ctl_get_disk_info(char * partition)361 static struct gpt_disk* boot_ctl_get_disk_info(char *partition)
362 {
363 struct gpt_disk *disk = NULL;
364 if (!partition)
365 return NULL;
366 disk = gpt_disk_alloc();
367 if (!disk) {
368 ALOGE("%s: Failed to alloc disk",
369 __func__);
370 goto error;
371 }
372 if (gpt_disk_get_disk_info(partition, disk)) {
373 ALOGE("failed to get disk info for %s",
374 partition);
375 goto error;
376 }
377 return disk;
378 error:
379 if (disk)
380 gpt_disk_free(disk);
381 return NULL;
382 }
383
384 //The argument here is a vector of partition names(including the slot suffix)
385 //that lie on a single disk
boot_ctl_set_active_slot_for_partitions(vector<string> part_list,unsigned slot)386 static int boot_ctl_set_active_slot_for_partitions(vector<string> part_list,
387 unsigned slot)
388 {
389 char buf[PATH_MAX] = {0};
390 struct gpt_disk *disk = NULL;
391 char slotA[MAX_GPT_NAME_SIZE + 1] = {0};
392 char slotB[MAX_GPT_NAME_SIZE + 1] = {0};
393 char active_guid[TYPE_GUID_SIZE + 1] = {0};
394 char inactive_guid[TYPE_GUID_SIZE + 1] = {0};
395 //Pointer to the partition entry of current 'A' partition
396 uint8_t *pentryA = NULL;
397 uint8_t *pentryA_bak = NULL;
398 //Pointer to partition entry of current 'B' partition
399 uint8_t *pentryB = NULL;
400 uint8_t *pentryB_bak = NULL;
401 struct stat st;
402 vector<string>::iterator partition_iterator;
403
404 for (partition_iterator = part_list.begin();
405 partition_iterator != part_list.end();
406 partition_iterator++) {
407 //Chop off the slot suffix from the partition name to
408 //make the string easier to work with.
409 string prefix = *partition_iterator;
410 if (prefix.size() < (strlen(AB_SLOT_A_SUFFIX) + 1)) {
411 ALOGE("Invalid partition name: %s", prefix.c_str());
412 goto error;
413 }
414 prefix.resize(prefix.size() - strlen(AB_SLOT_A_SUFFIX));
415 //Check if A/B versions of this ptn exist
416 snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
417 prefix.c_str(),
418 AB_SLOT_A_SUFFIX);
419 if (stat(buf, &st))
420 continue;
421 memset(buf, '\0', sizeof(buf));
422 snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
423 prefix.c_str(),
424 AB_SLOT_B_SUFFIX);
425 if (stat(buf, &st))
426 continue;
427 memset(slotA, 0, sizeof(slotA));
428 memset(slotB, 0, sizeof(slotA));
429 snprintf(slotA, sizeof(slotA) - 1, "%s%s", prefix.c_str(),
430 AB_SLOT_A_SUFFIX);
431 snprintf(slotB, sizeof(slotB) - 1,"%s%s", prefix.c_str(),
432 AB_SLOT_B_SUFFIX);
433 //Get the disk containing the partitions that were passed in.
434 //All partitions passed in must lie on the same disk.
435 if (!disk) {
436 disk = boot_ctl_get_disk_info(slotA);
437 if (!disk)
438 goto error;
439 }
440 //Get partition entry for slot A & B from the primary
441 //and backup tables.
442 pentryA = gpt_disk_get_pentry(disk, slotA, PRIMARY_GPT);
443 pentryA_bak = gpt_disk_get_pentry(disk, slotA, SECONDARY_GPT);
444 pentryB = gpt_disk_get_pentry(disk, slotB, PRIMARY_GPT);
445 pentryB_bak = gpt_disk_get_pentry(disk, slotB, SECONDARY_GPT);
446 if ( !pentryA || !pentryA_bak || !pentryB || !pentryB_bak) {
447 //None of these should be NULL since we have already
448 //checked for A & B versions earlier.
449 ALOGE("Slot pentries for %s not found.",
450 prefix.c_str());
451 goto error;
452 }
453 memset(active_guid, '\0', sizeof(active_guid));
454 memset(inactive_guid, '\0', sizeof(inactive_guid));
455 if (get_partition_attribute(slotA, ATTR_SLOT_ACTIVE) == 1) {
456 //A is the current active slot
457 memcpy((void*)active_guid, (const void*)pentryA,
458 TYPE_GUID_SIZE);
459 memcpy((void*)inactive_guid,(const void*)pentryB,
460 TYPE_GUID_SIZE);
461 } else if (get_partition_attribute(slotB,
462 ATTR_SLOT_ACTIVE) == 1) {
463 //B is the current active slot
464 memcpy((void*)active_guid, (const void*)pentryB,
465 TYPE_GUID_SIZE);
466 memcpy((void*)inactive_guid, (const void*)pentryA,
467 TYPE_GUID_SIZE);
468 } else {
469 ALOGE("Both A & B are inactive..Aborting");
470 goto error;
471 }
472 if (!strncmp(slot_suffix_arr[slot], AB_SLOT_A_SUFFIX,
473 strlen(AB_SLOT_A_SUFFIX))){
474 //Mark A as active in primary table
475 UPDATE_SLOT(pentryA, active_guid, SLOT_ACTIVE);
476 //Mark A as active in backup table
477 UPDATE_SLOT(pentryA_bak, active_guid, SLOT_ACTIVE);
478 //Mark B as inactive in primary table
479 UPDATE_SLOT(pentryB, inactive_guid, SLOT_INACTIVE);
480 //Mark B as inactive in backup table
481 UPDATE_SLOT(pentryB_bak, inactive_guid, SLOT_INACTIVE);
482 } else if (!strncmp(slot_suffix_arr[slot], AB_SLOT_B_SUFFIX,
483 strlen(AB_SLOT_B_SUFFIX))){
484 //Mark B as active in primary table
485 UPDATE_SLOT(pentryB, active_guid, SLOT_ACTIVE);
486 //Mark B as active in backup table
487 UPDATE_SLOT(pentryB_bak, active_guid, SLOT_ACTIVE);
488 //Mark A as inavtive in primary table
489 UPDATE_SLOT(pentryA, inactive_guid, SLOT_INACTIVE);
490 //Mark A as inactive in backup table
491 UPDATE_SLOT(pentryA_bak, inactive_guid, SLOT_INACTIVE);
492 } else {
493 //Something has gone terribly terribly wrong
494 ALOGE("%s: Unknown slot suffix!", __func__);
495 goto error;
496 }
497 if (disk) {
498 if (gpt_disk_update_crc(disk) != 0) {
499 ALOGE("%s: Failed to update gpt_disk crc",
500 __func__);
501 goto error;
502 }
503 }
504 }
505 //write updated content to disk
506 if (disk) {
507 if (gpt_disk_commit(disk)) {
508 ALOGE("Failed to commit disk entry");
509 goto error;
510 }
511 gpt_disk_free(disk);
512 }
513 return 0;
514
515 error:
516 if (disk)
517 gpt_disk_free(disk);
518 return -1;
519 }
520
set_active_boot_slot(struct boot_control_module * module,unsigned slot)521 int set_active_boot_slot(struct boot_control_module *module, unsigned slot)
522 {
523 map<string, vector<string>> ptn_map;
524 vector<string> ptn_vec;
525 const char ptn_list[][MAX_GPT_NAME_SIZE] = { AB_PTN_LIST };
526 uint32_t i;
527 int rc = -1;
528 int is_ufs = gpt_utils_is_ufs_device();
529 map<string, vector<string>>::iterator map_iter;
530 vector<string>::iterator string_iter;
531
532 if (boot_control_check_slot_sanity(module, slot)) {
533 ALOGE("%s: Bad arguments", __func__);
534 goto error;
535 }
536 //The partition list just contains prefixes(without the _a/_b) of the
537 //partitions that support A/B. In order to get the layout we need the
538 //actual names. To do this we append the slot suffix to every member
539 //in the list.
540 for (i = 0; i < ARRAY_SIZE(ptn_list); i++) {
541 //XBL is handled differrently for ufs devices so ignore it
542 if (is_ufs && !strncmp(ptn_list[i], PTN_XBL, strlen(PTN_XBL)))
543 continue;
544 //The partition list will be the list of _a partitions
545 string cur_ptn = ptn_list[i];
546 cur_ptn.append(AB_SLOT_A_SUFFIX);
547 ptn_vec.push_back(cur_ptn);
548
549 }
550 //The partition map gives us info in the following format:
551 // [path_to_block_device_1]--><partitions on device 1>
552 // [path_to_block_device_2]--><partitions on device 2>
553 // ...
554 // ...
555 // eg:
556 // [/dev/block/sdb]---><system, boot, rpm, tz,....>
557 if (gpt_utils_get_partition_map(ptn_vec, ptn_map)) {
558 ALOGE("%s: Failed to get partition map",
559 __func__);
560 goto error;
561 }
562 for (map_iter = ptn_map.begin(); map_iter != ptn_map.end(); map_iter++){
563 if (map_iter->second.size() < 1)
564 continue;
565 if (boot_ctl_set_active_slot_for_partitions(map_iter->second, slot)) {
566 ALOGE("%s: Failed to set active slot for partitions ", __func__);;
567 goto error;
568 }
569 }
570 if (is_ufs) {
571 if (!strncmp(slot_suffix_arr[slot], AB_SLOT_A_SUFFIX,
572 strlen(AB_SLOT_A_SUFFIX))){
573 //Set xbl_a as the boot lun
574 rc = gpt_utils_set_xbl_boot_partition(NORMAL_BOOT);
575 } else if (!strncmp(slot_suffix_arr[slot], AB_SLOT_B_SUFFIX,
576 strlen(AB_SLOT_B_SUFFIX))){
577 //Set xbl_b as the boot lun
578 rc = gpt_utils_set_xbl_boot_partition(BACKUP_BOOT);
579 } else {
580 //Something has gone terribly terribly wrong
581 ALOGE("%s: Unknown slot suffix!", __func__);
582 goto error;
583 }
584 if (rc) {
585 ALOGE("%s: Failed to switch xbl boot partition",
586 __func__);
587 goto error;
588 }
589 }
590 return 0;
591 error:
592 return -1;
593 }
594
set_slot_as_unbootable(struct boot_control_module * module,unsigned slot)595 int set_slot_as_unbootable(struct boot_control_module *module, unsigned slot)
596 {
597 if (boot_control_check_slot_sanity(module, slot) != 0) {
598 ALOGE("%s: Argument check failed", __func__);
599 goto error;
600 }
601 if (update_slot_attribute(slot_suffix_arr[slot],
602 ATTR_UNBOOTABLE)) {
603 goto error;
604 }
605 return 0;
606 error:
607 ALOGE("%s: Failed to mark slot unbootable", __func__);
608 return -1;
609 }
610
is_slot_bootable(struct boot_control_module * module,unsigned slot)611 int is_slot_bootable(struct boot_control_module *module, unsigned slot)
612 {
613 int attr = 0;
614 char bootPartition[MAX_GPT_NAME_SIZE + 1] = {0};
615
616 if (boot_control_check_slot_sanity(module, slot) != 0) {
617 ALOGE("%s: Argument check failed", __func__);
618 goto error;
619 }
620 snprintf(bootPartition,
621 sizeof(bootPartition) - 1, "boot%s",
622 slot_suffix_arr[slot]);
623 attr = get_partition_attribute(bootPartition, ATTR_UNBOOTABLE);
624 if (attr >= 0)
625 return !attr;
626 error:
627 return -1;
628 }
629
is_slot_marked_successful(struct boot_control_module * module,unsigned slot)630 int is_slot_marked_successful(struct boot_control_module *module, unsigned slot)
631 {
632 int attr = 0;
633 char bootPartition[MAX_GPT_NAME_SIZE + 1] = {0};
634
635 if (boot_control_check_slot_sanity(module, slot) != 0) {
636 ALOGE("%s: Argument check failed", __func__);
637 goto error;
638 }
639 snprintf(bootPartition,
640 sizeof(bootPartition) - 1,
641 "boot%s", slot_suffix_arr[slot]);
642 attr = get_partition_attribute(bootPartition, ATTR_BOOT_SUCCESSFUL);
643 if (attr >= 0)
644 return attr;
645 error:
646 return -1;
647 }
648
649 static hw_module_methods_t boot_control_module_methods = {
650 .open = NULL,
651 };
652
653 boot_control_module_t HAL_MODULE_INFO_SYM = {
654 .common = {
655 .tag = HARDWARE_MODULE_TAG,
656 .module_api_version = 1,
657 .hal_api_version = 0,
658 .id = BOOT_CONTROL_HARDWARE_MODULE_ID,
659 .name = "Boot control HAL",
660 .author = "Code Aurora Forum",
661 .methods = &boot_control_module_methods,
662 },
663 .init = boot_control_init,
664 .getNumberSlots = get_number_slots,
665 .getCurrentSlot = get_current_slot,
666 .markBootSuccessful = mark_boot_successful,
667 .setActiveBootSlot = set_active_boot_slot,
668 .setSlotAsUnbootable = set_slot_as_unbootable,
669 .isSlotBootable = is_slot_bootable,
670 .getSuffix = get_suffix,
671 .isSlotMarkedSuccessful = is_slot_marked_successful,
672 };
673 #ifdef __cplusplus
674 }
675 #endif
676