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BootControl: blow AR on boot complete

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Bug: 232277507
Signed-off-by: Jidong Sun <jidong@google.com>
Change-Id: I684bc259407b3cbaa5dda9fdc16158d7bd4b4e02
This commit is contained in:
Jidong Sun 2022-06-03 14:42:05 -07:00
parent 29c8d8c5ff
commit 9ecd004e6b
1 changed files with 18 additions and 1 deletions
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19
interfaces/boot/1.2/BootControl.cpp
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@ -49,6 +49,8 @@ namespace {
#define BOOT_B_PATH "/dev/block/by-name/boot_b"
#define DEVINFO_PATH "/dev/block/by-name/devinfo"
#define BLOW_AR_PATH "/sys/kernel/boot_control/blow_ar"
// slot flags
#define AB_ATTR_PRIORITY_SHIFT 52
#define AB_ATTR_PRIORITY_MASK (3UL << AB_ATTR_PRIORITY_SHIFT)
@ -174,6 +176,11 @@ static void DevInfoInitSlot(devinfo_ab_slot_data_t &slot_data) {
slot_data.fastboot_ok = 0;
}
static bool blowAR() {
android::base::unique_fd fd(open(BLOW_AR_PATH, O_WRONLY | O_DSYNC));
return android::base::WriteStringToFd("1", fd);
}
} // namespace
// Methods from ::android::hardware::boot::V1_0::IBootControl follow.
@ -211,7 +218,17 @@ Return<void> BootControl::markBootSuccessful(markBootSuccessful_cb _hidl_cb) {
ret = setSlotFlag(getCurrentSlot(), AB_ATTR_SUCCESSFUL);
}
!ret ? _hidl_cb({false, "Failed to set successful flag"}) : _hidl_cb({true, ""});
if (!ret) {
_hidl_cb({false, "Failed to set successful flag"});
return Void();
}
if (!blowAR()) {
ALOGE("Failed to blow anti-rollback counter");
// Ignore the error, since ABL will re-trigger it on reboot
}
_hidl_cb({true, ""});
return Void();
}