bootcontrol: Reduce the number of writes in the set active slot function
We now write the 'gpt_disk' structure back to storage only once per each
physical disk.
Also did a minor cleanup of the code.
Bug: 28352938
Bug: 29436641
Change-Id: Id4fd887fe2978f9cd17447e9a1b715f0a8df5073
diff --git a/boot_control.cpp b/boot_control.cpp
new file mode 100644
index 0000000..539c52c
--- /dev/null
+++ b/boot_control.cpp
@@ -0,0 +1,670 @@
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <map>
+#include <list>
+#include <string>
+#include <vector>
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <errno.h>
+#define LOG_TAG "bootcontrolhal"
+#include <cutils/log.h>
+#include <hardware/boot_control.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <cutils/properties.h>
+#include "gpt-utils.h"
+
+#define BOOTDEV_DIR "/dev/block/bootdevice/by-name"
+#define BOOT_IMG_PTN_NAME "boot"
+#define LUN_NAME_END_LOC 14
+#define BOOT_SLOT_PROP "ro.boot.slot_suffix"
+
+#define SLOT_ACTIVE 1
+#define SLOT_INACTIVE 2
+#define UPDATE_SLOT(pentry, guid, slot_state) ({ \
+ memcpy(pentry, guid, TYPE_GUID_SIZE); \
+ if (slot_state == SLOT_ACTIVE)\
+ *(pentry + AB_FLAG_OFFSET) = AB_SLOT_ACTIVE_VAL; \
+ else if (slot_state == SLOT_INACTIVE) \
+ *(pentry + AB_FLAG_OFFSET) = (*(pentry + AB_FLAG_OFFSET)& \
+ ~AB_PARTITION_ATTR_SLOT_ACTIVE); \
+ })
+
+using namespace std;
+const char *slot_suffix_arr[] = {
+ AB_SLOT_A_SUFFIX,
+ AB_SLOT_B_SUFFIX,
+ NULL};
+
+enum part_attr_type {
+ ATTR_SLOT_ACTIVE = 0,
+ ATTR_BOOT_SUCCESSFUL,
+ ATTR_UNBOOTABLE,
+};
+
+void boot_control_init(struct boot_control_module *module)
+{
+ if (!module) {
+ ALOGE("Invalid argument passed to %s", __func__);
+ return;
+ }
+ return;
+}
+
+//Get the value of one of the attribute fields for a partition.
+static int get_partition_attribute(char *partname,
+ enum part_attr_type part_attr)
+{
+ struct gpt_disk *disk = NULL;
+ uint8_t *pentry = NULL;
+ int retval = -1;
+ uint8_t *attr = NULL;
+ if (!partname)
+ goto error;
+ disk = gpt_disk_alloc();
+ if (!disk) {
+ ALOGE("%s: Failed to alloc disk struct", __func__);
+ goto error;
+ }
+ if (gpt_disk_get_disk_info(partname, disk)) {
+ ALOGE("%s: Failed to get disk info", __func__);
+ goto error;
+ }
+ pentry = gpt_disk_get_pentry(disk, partname, PRIMARY_GPT);
+ if (!pentry) {
+ ALOGE("%s: pentry does not exist in disk struct",
+ __func__);
+ goto error;
+ }
+ attr = pentry + AB_FLAG_OFFSET;
+ if (part_attr == ATTR_SLOT_ACTIVE)
+ retval = !!(*attr & AB_PARTITION_ATTR_SLOT_ACTIVE);
+ else if (part_attr == ATTR_BOOT_SUCCESSFUL)
+ retval = !!(*attr & AB_PARTITION_ATTR_BOOT_SUCCESSFUL);
+ else if (part_attr == ATTR_UNBOOTABLE)
+ retval = !!(*attr & AB_PARTITION_ATTR_UNBOOTABLE);
+ else
+ retval = -1;
+ gpt_disk_free(disk);
+ return retval;
+error:
+ if (disk)
+ gpt_disk_free(disk);
+ return retval;
+}
+
+//Set a particular attribute for all the partitions in a
+//slot
+static int update_slot_attribute(const char *slot,
+ enum part_attr_type ab_attr)
+{
+ unsigned int i = 0;
+ char buf[PATH_MAX];
+ struct stat st;
+ struct gpt_disk *disk = NULL;
+ uint8_t *pentry = NULL;
+ uint8_t *pentry_bak = NULL;
+ int rc = -1;
+ uint8_t *attr = NULL;
+ uint8_t *attr_bak = NULL;
+ char partName[MAX_GPT_NAME_SIZE + 1] = {0};
+ const char ptn_list[][MAX_GPT_NAME_SIZE] = { AB_PTN_LIST };
+ int slot_name_valid = 0;
+ if (!slot) {
+ ALOGE("%s: Invalid argument", __func__);
+ goto error;
+ }
+ for (i = 0; slot_suffix_arr[i] != NULL; i++)
+ {
+ if (!strncmp(slot, slot_suffix_arr[i],
+ strlen(slot_suffix_arr[i])))
+ slot_name_valid = 1;
+ }
+ if (!slot_name_valid) {
+ ALOGE("%s: Invalid slot name", __func__);
+ goto error;
+ }
+ for (i=0; i < ARRAY_SIZE(ptn_list); i++) {
+ memset(buf, '\0', sizeof(buf));
+ //Check if A/B versions of this ptn exist
+ snprintf(buf, sizeof(buf) - 1,
+ "%s/%s%s",
+ BOOT_DEV_DIR,
+ ptn_list[i],
+ AB_SLOT_A_SUFFIX
+ );
+ if (stat(buf, &st)) {
+ //partition does not have _a version
+ continue;
+ }
+ memset(buf, '\0', sizeof(buf));
+ snprintf(buf, sizeof(buf) - 1,
+ "%s/%s%s",
+ BOOT_DEV_DIR,
+ ptn_list[i],
+ AB_SLOT_B_SUFFIX
+ );
+ if (stat(buf, &st)) {
+ //partition does not have _a version
+ continue;
+ }
+ memset(partName, '\0', sizeof(partName));
+ snprintf(partName,
+ sizeof(partName) - 1,
+ "%s%s",
+ ptn_list[i],
+ slot);
+ disk = gpt_disk_alloc();
+ if (!disk) {
+ ALOGE("%s: Failed to alloc disk struct",
+ __func__);
+ goto error;
+ }
+ rc = gpt_disk_get_disk_info(partName, disk);
+ if (rc != 0) {
+ ALOGE("%s: Failed to get disk info for %s",
+ __func__,
+ partName);
+ goto error;
+ }
+ pentry = gpt_disk_get_pentry(disk, partName, PRIMARY_GPT);
+ pentry_bak = gpt_disk_get_pentry(disk, partName, SECONDARY_GPT);
+ if (!pentry || !pentry_bak) {
+ ALOGE("%s: Failed to get pentry/pentry_bak for %s",
+ __func__,
+ partName);
+ goto error;
+ }
+ attr = pentry + AB_FLAG_OFFSET;
+ attr_bak = pentry_bak + AB_FLAG_OFFSET;
+ if (ab_attr == ATTR_BOOT_SUCCESSFUL) {
+ *attr = (*attr) | AB_PARTITION_ATTR_BOOT_SUCCESSFUL;
+ *attr_bak = (*attr_bak) |
+ AB_PARTITION_ATTR_BOOT_SUCCESSFUL;
+ } else if (ab_attr == ATTR_UNBOOTABLE) {
+ *attr = (*attr) | AB_PARTITION_ATTR_UNBOOTABLE;
+ *attr_bak = (*attr_bak) | AB_PARTITION_ATTR_UNBOOTABLE;
+ } else if (ab_attr == ATTR_SLOT_ACTIVE) {
+ *attr = (*attr) | AB_PARTITION_ATTR_SLOT_ACTIVE;
+ *attr_bak = (*attr) | AB_PARTITION_ATTR_SLOT_ACTIVE;
+ } else {
+ ALOGE("%s: Unrecognized attr", __func__);
+ goto error;
+ }
+ if (gpt_disk_update_crc(disk)) {
+ ALOGE("%s: Failed to update crc for %s",
+ __func__,
+ partName);
+ goto error;
+ }
+ if (gpt_disk_commit(disk)) {
+ ALOGE("%s: Failed to write back entry for %s",
+ __func__,
+ partName);
+ goto error;
+ }
+ gpt_disk_free(disk);
+ disk = NULL;
+ }
+ return 0;
+error:
+ if (disk)
+ gpt_disk_free(disk);
+ return -1;
+}
+
+unsigned get_number_slots(struct boot_control_module *module)
+{
+ struct dirent *de = NULL;
+ DIR *dir_bootdev = NULL;
+ unsigned slot_count = 0;
+ if (!module) {
+ ALOGE("%s: Invalid argument", __func__);
+ goto error;
+ }
+ dir_bootdev = opendir(BOOTDEV_DIR);
+ if (!dir_bootdev) {
+ ALOGE("%s: Failed to open bootdev dir (%s)",
+ __func__,
+ strerror(errno));
+ goto error;
+ }
+ while ((de = readdir(dir_bootdev))) {
+ if (de->d_name[0] == '.')
+ continue;
+ if (!strncmp(de->d_name, BOOT_IMG_PTN_NAME,
+ strlen(BOOT_IMG_PTN_NAME)))
+ slot_count++;
+ }
+ closedir(dir_bootdev);
+ return slot_count;
+error:
+ if (dir_bootdev)
+ closedir(dir_bootdev);
+ return 0;
+}
+
+unsigned get_current_slot(struct boot_control_module *module)
+{
+ uint32_t num_slots = 0;
+ char bootSlotProp[PROPERTY_VALUE_MAX] = {'\0'};
+ unsigned i = 0;
+ if (!module) {
+ ALOGE("%s: Invalid argument", __func__);
+ goto error;
+ }
+ num_slots = get_number_slots(module);
+ if (num_slots <= 1) {
+ //Slot 0 is the only slot around.
+ return 0;
+ }
+ property_get(BOOT_SLOT_PROP, bootSlotProp, "N/A");
+ if (!strncmp(bootSlotProp, "N/A", strlen("N/A"))) {
+ ALOGE("%s: Unable to read boot slot property",
+ __func__);
+ goto error;
+ }
+ //Iterate through a list of partitons named as boot+suffix
+ //and see which one is currently active.
+ for (i = 0; slot_suffix_arr[i] != NULL ; i++) {
+ if (!strncmp(bootSlotProp,
+ slot_suffix_arr[i],
+ strlen(slot_suffix_arr[i])))
+ return i;
+ }
+error:
+ //The HAL spec requires that we return a number between
+ //0 to num_slots - 1. Since something went wrong here we
+ //are just going to return the default slot.
+ return 0;
+}
+
+static int boot_control_check_slot_sanity(struct boot_control_module *module,
+ unsigned slot)
+{
+ if (!module)
+ return -1;
+ uint32_t num_slots = get_number_slots(module);
+ if ((num_slots < 1) || (slot > num_slots - 1)) {
+ ALOGE("Invalid slot number");
+ return -1;
+ }
+ return 0;
+
+}
+
+int mark_boot_successful(struct boot_control_module *module)
+{
+ unsigned cur_slot = 0;
+ if (!module) {
+ ALOGE("%s: Invalid argument", __func__);
+ goto error;
+ }
+ cur_slot = get_current_slot(module);
+ if (update_slot_attribute(slot_suffix_arr[cur_slot],
+ ATTR_BOOT_SUCCESSFUL)) {
+ goto error;
+ }
+ return 0;
+error:
+ ALOGE("%s: Failed to mark boot successful", __func__);
+ return -1;
+}
+
+const char *get_suffix(struct boot_control_module *module, unsigned slot)
+{
+ if (boot_control_check_slot_sanity(module, slot) != 0)
+ return NULL;
+ else
+ return slot_suffix_arr[slot];
+}
+
+
+//Return a gpt disk structure representing the disk that holds
+//partition.
+static struct gpt_disk* boot_ctl_get_disk_info(char *partition)
+{
+ struct gpt_disk *disk = NULL;
+ if (!partition)
+ return NULL;
+ disk = gpt_disk_alloc();
+ if (!disk) {
+ ALOGE("%s: Failed to alloc disk",
+ __func__);
+ goto error;
+ }
+ if (gpt_disk_get_disk_info(partition, disk)) {
+ ALOGE("failed to get disk info for %s",
+ partition);
+ goto error;
+ }
+ return disk;
+error:
+ if (disk)
+ gpt_disk_free(disk);
+ return NULL;
+}
+
+//The argument here is a vector of partition names(including the slot suffix)
+//that lie on a single disk
+static int boot_ctl_set_active_slot_for_partitions(vector<string> part_list,
+ unsigned slot)
+{
+ char buf[PATH_MAX] = {0};
+ struct gpt_disk *disk = NULL;
+ char slotA[MAX_GPT_NAME_SIZE + 1] = {0};
+ char slotB[MAX_GPT_NAME_SIZE + 1] = {0};
+ char active_guid[TYPE_GUID_SIZE + 1] = {0};
+ char inactive_guid[TYPE_GUID_SIZE + 1] = {0};
+ //Pointer to the partition entry of current 'A' partition
+ uint8_t *pentryA = NULL;
+ uint8_t *pentryA_bak = NULL;
+ //Pointer to partition entry of current 'B' partition
+ uint8_t *pentryB = NULL;
+ uint8_t *pentryB_bak = NULL;
+ struct stat st;
+ vector<string>::iterator partition_iterator;
+
+ for (partition_iterator = part_list.begin();
+ partition_iterator != part_list.end();
+ partition_iterator++) {
+ //Chop off the slot suffix from the partition name to
+ //make the string easier to work with.
+ string prefix = *partition_iterator;
+ if (prefix.size() < (strlen(AB_SLOT_A_SUFFIX) + 1)) {
+ ALOGE("Invalid partition name: %s", prefix.c_str());
+ goto error;
+ }
+ prefix.resize(prefix.size() - strlen(AB_SLOT_A_SUFFIX));
+ //Check if A/B versions of this ptn exist
+ snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
+ prefix.c_str(),
+ AB_SLOT_A_SUFFIX);
+ if (stat(buf, &st))
+ continue;
+ memset(buf, '\0', sizeof(buf));
+ snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
+ prefix.c_str(),
+ AB_SLOT_B_SUFFIX);
+ if (stat(buf, &st))
+ continue;
+ memset(slotA, 0, sizeof(slotA));
+ memset(slotB, 0, sizeof(slotA));
+ snprintf(slotA, sizeof(slotA) - 1, "%s%s", prefix.c_str(),
+ AB_SLOT_A_SUFFIX);
+ snprintf(slotB, sizeof(slotB) - 1,"%s%s", prefix.c_str(),
+ AB_SLOT_B_SUFFIX);
+ //Get the disk containing the partitions that were passed in.
+ //All partitions passed in must lie on the same disk.
+ if (!disk) {
+ disk = boot_ctl_get_disk_info(slotA);
+ if (!disk)
+ goto error;
+ }
+ //Get partition entry for slot A & B from the primary
+ //and backup tables.
+ pentryA = gpt_disk_get_pentry(disk, slotA, PRIMARY_GPT);
+ pentryA_bak = gpt_disk_get_pentry(disk, slotA, SECONDARY_GPT);
+ pentryB = gpt_disk_get_pentry(disk, slotB, PRIMARY_GPT);
+ pentryB_bak = gpt_disk_get_pentry(disk, slotB, SECONDARY_GPT);
+ if ( !pentryA || !pentryA_bak || !pentryB || !pentryB_bak) {
+ //None of these should be NULL since we have already
+ //checked for A & B versions earlier.
+ ALOGE("Slot pentries for %s not found.",
+ prefix.c_str());
+ goto error;
+ }
+ memset(active_guid, '\0', sizeof(active_guid));
+ memset(inactive_guid, '\0', sizeof(inactive_guid));
+ if (get_partition_attribute(slotA, ATTR_SLOT_ACTIVE) == 1) {
+ //A is the current active slot
+ memcpy((void*)active_guid, (const void*)pentryA,
+ TYPE_GUID_SIZE);
+ memcpy((void*)inactive_guid,(const void*)pentryB,
+ TYPE_GUID_SIZE);
+ } else if (get_partition_attribute(slotB,
+ ATTR_SLOT_ACTIVE) == 1) {
+ //B is the current active slot
+ memcpy((void*)active_guid, (const void*)pentryB,
+ TYPE_GUID_SIZE);
+ memcpy((void*)inactive_guid, (const void*)pentryA,
+ TYPE_GUID_SIZE);
+ } else {
+ ALOGE("Both A & B are inactive..Aborting");
+ goto error;
+ }
+ if (!strncmp(slot_suffix_arr[slot], AB_SLOT_A_SUFFIX,
+ strlen(AB_SLOT_A_SUFFIX))){
+ //Mark A as active in primary table
+ UPDATE_SLOT(pentryA, active_guid, SLOT_ACTIVE);
+ //Mark A as active in backup table
+ UPDATE_SLOT(pentryA_bak, active_guid, SLOT_ACTIVE);
+ //Mark B as inactive in primary table
+ UPDATE_SLOT(pentryB, inactive_guid, SLOT_INACTIVE);
+ //Mark B as inactive in backup table
+ UPDATE_SLOT(pentryB_bak, inactive_guid, SLOT_INACTIVE);
+ } else if (!strncmp(slot_suffix_arr[slot], AB_SLOT_B_SUFFIX,
+ strlen(AB_SLOT_B_SUFFIX))){
+ //Mark B as active in primary table
+ UPDATE_SLOT(pentryB, active_guid, SLOT_ACTIVE);
+ //Mark B as active in backup table
+ UPDATE_SLOT(pentryB_bak, active_guid, SLOT_ACTIVE);
+ //Mark A as inavtive in primary table
+ UPDATE_SLOT(pentryA, inactive_guid, SLOT_INACTIVE);
+ //Mark A as inactive in backup table
+ UPDATE_SLOT(pentryA_bak, inactive_guid, SLOT_INACTIVE);
+ } else {
+ //Something has gone terribly terribly wrong
+ ALOGE("%s: Unknown slot suffix!", __func__);
+ goto error;
+ }
+ if (disk) {
+ if (gpt_disk_update_crc(disk) != 0) {
+ ALOGE("%s: Failed to update gpt_disk crc",
+ __func__);
+ goto error;
+ }
+ }
+ }
+ //write updated content to disk
+ if (disk) {
+ if (gpt_disk_commit(disk)) {
+ ALOGE("Failed to commit disk entry");
+ goto error;
+ }
+ gpt_disk_free(disk);
+ }
+ return 0;
+
+error:
+ if (disk)
+ gpt_disk_free(disk);
+ return -1;
+}
+
+int set_active_boot_slot(struct boot_control_module *module, unsigned slot)
+{
+ map<string, vector<string>> ptn_map;
+ vector<string> ptn_vec;
+ const char ptn_list[][MAX_GPT_NAME_SIZE] = { AB_PTN_LIST };
+ uint32_t i;
+ int rc = -1;
+ int is_ufs = gpt_utils_is_ufs_device();
+ map<string, vector<string>>::iterator map_iter;
+ vector<string>::iterator string_iter;
+
+ if (boot_control_check_slot_sanity(module, slot)) {
+ ALOGE("%s: Bad arguments", __func__);
+ goto error;
+ }
+ //The partition list just contains prefixes(without the _a/_b) of the
+ //partitions that support A/B. In order to get the layout we need the
+ //actual names. To do this we append the slot suffix to every member
+ //in the list.
+ for (i = 0; i < ARRAY_SIZE(ptn_list); i++) {
+ //XBL is handled differrently for ufs devices so ignore it
+ if (is_ufs && !strncmp(ptn_list[i], PTN_XBL, strlen(PTN_XBL)))
+ continue;
+ //The partition list will be the list of _a partitions
+ string cur_ptn = ptn_list[i];
+ cur_ptn.append(AB_SLOT_A_SUFFIX);
+ ptn_vec.push_back(cur_ptn);
+
+ }
+ //The partition map gives us info in the following format:
+ // [path_to_block_device_1]--><partitions on device 1>
+ // [path_to_block_device_2]--><partitions on device 2>
+ // ...
+ // ...
+ // eg:
+ // [/dev/block/sdb]---><system, boot, rpm, tz,....>
+ if (gpt_utils_get_partition_map(ptn_vec, ptn_map)) {
+ ALOGE("%s: Failed to get partition map",
+ __func__);
+ goto error;
+ }
+ for (map_iter = ptn_map.begin(); map_iter != ptn_map.end(); map_iter++){
+ if (map_iter->second.size() < 1)
+ continue;
+ boot_ctl_set_active_slot_for_partitions(map_iter->second, slot);
+ }
+ if (is_ufs) {
+ if (!strncmp(slot_suffix_arr[slot], AB_SLOT_A_SUFFIX,
+ strlen(AB_SLOT_A_SUFFIX))){
+ //Set xbl_a as the boot lun
+ rc = gpt_utils_set_xbl_boot_partition(NORMAL_BOOT);
+ } else if (!strncmp(slot_suffix_arr[slot], AB_SLOT_B_SUFFIX,
+ strlen(AB_SLOT_B_SUFFIX))){
+ //Set xbl_b as the boot lun
+ rc = gpt_utils_set_xbl_boot_partition(BACKUP_BOOT);
+ } else {
+ //Something has gone terribly terribly wrong
+ ALOGE("%s: Unknown slot suffix!", __func__);
+ goto error;
+ }
+ if (rc) {
+ ALOGE("%s: Failed to switch xbl boot partition",
+ __func__);
+ goto error;
+ }
+ }
+ return 0;
+error:
+ return -1;
+}
+
+int set_slot_as_unbootable(struct boot_control_module *module, unsigned slot)
+{
+ if (boot_control_check_slot_sanity(module, slot) != 0) {
+ ALOGE("%s: Argument check failed", __func__);
+ goto error;
+ }
+ if (update_slot_attribute(slot_suffix_arr[slot],
+ ATTR_UNBOOTABLE)) {
+ goto error;
+ }
+ return 0;
+error:
+ ALOGE("%s: Failed to mark slot unbootable", __func__);
+ return -1;
+}
+
+int is_slot_bootable(struct boot_control_module *module, unsigned slot)
+{
+ int attr = 0;
+ char bootPartition[MAX_GPT_NAME_SIZE + 1] = {0};
+
+ if (boot_control_check_slot_sanity(module, slot) != 0) {
+ ALOGE("%s: Argument check failed", __func__);
+ goto error;
+ }
+ snprintf(bootPartition,
+ sizeof(bootPartition) - 1, "boot%s",
+ slot_suffix_arr[slot]);
+ attr = get_partition_attribute(bootPartition, ATTR_UNBOOTABLE);
+ if (attr >= 0)
+ return !attr;
+error:
+ return -1;
+}
+
+int is_slot_marked_successful(struct boot_control_module *module, unsigned slot)
+{
+ int attr = 0;
+ char bootPartition[MAX_GPT_NAME_SIZE + 1] = {0};
+
+ if (boot_control_check_slot_sanity(module, slot) != 0) {
+ ALOGE("%s: Argument check failed", __func__);
+ goto error;
+ }
+ snprintf(bootPartition,
+ sizeof(bootPartition) - 1,
+ "boot%s", slot_suffix_arr[slot]);
+ attr = get_partition_attribute(bootPartition, ATTR_BOOT_SUCCESSFUL);
+ if (attr >= 0)
+ return attr;
+error:
+ return -1;
+}
+
+static hw_module_methods_t boot_control_module_methods = {
+ .open = NULL,
+};
+
+boot_control_module_t HAL_MODULE_INFO_SYM = {
+ .common = {
+ .tag = HARDWARE_MODULE_TAG,
+ .module_api_version = 1,
+ .hal_api_version = 0,
+ .id = BOOT_CONTROL_HARDWARE_MODULE_ID,
+ .name = "Boot control HAL",
+ .author = "Code Aurora Forum",
+ .methods = &boot_control_module_methods,
+ },
+ .init = boot_control_init,
+ .getNumberSlots = get_number_slots,
+ .getCurrentSlot = get_current_slot,
+ .markBootSuccessful = mark_boot_successful,
+ .setActiveBootSlot = set_active_boot_slot,
+ .setSlotAsUnbootable = set_slot_as_unbootable,
+ .isSlotBootable = is_slot_bootable,
+ .getSuffix = get_suffix,
+ .isSlotMarkedSuccessful = is_slot_marked_successful,
+};
+#ifdef __cplusplus
+}
+#endif