Add support for compressed snapshot merges in fastboot.
SnapshotManager::New() is now preferred in recovery. Previously we used
NewForFirstStageMount(), which is technically incorrect as that enables
code paths specifically for first-stage init.
We also explicitly label the snapuserd context, since rootfs in recovery
has unlabelled files.
Finally, we add a timeout to internal calls to
CreateSnapshotsAndLogicalPartitions. Without this, WaitForDevice() calls
will terminate immediately, which breaks VABC given the more complex
device stacking that is created.
Bug: 168258606
Test: fastboot snapshot-update merge
Change-Id: I3a663b95c0b1eabaf14e6fde409c6902653c3c5e
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index 2b2a0bf..b2b6a9e 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -659,7 +659,7 @@
return device->WriteFail("No snapshot merge is in progress");
}
- auto sm = SnapshotManager::NewForFirstStageMount();
+ auto sm = SnapshotManager::New();
if (!sm) {
return device->WriteFail("Unable to create SnapshotManager");
}
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index 9329725..a171c23 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -94,7 +94,11 @@
if (!info) {
info = new DeviceInfo();
}
- return std::unique_ptr<SnapshotManager>(new SnapshotManager(info));
+ auto sm = std::unique_ptr<SnapshotManager>(new SnapshotManager(info));
+ if (info->IsRecovery()) {
+ sm->ForceLocalImageManager();
+ }
+ return sm;
}
std::unique_ptr<SnapshotManager> SnapshotManager::NewForFirstStageMount(IDeviceInfo* info) {
@@ -3169,7 +3173,7 @@
auto slot_number = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
auto super_path = device_->GetSuperDevice(slot_number);
- if (!CreateLogicalAndSnapshotPartitions(super_path)) {
+ if (!CreateLogicalAndSnapshotPartitions(super_path, 20s)) {
LOG(ERROR) << "Unable to map partitions to complete merge.";
return false;
}
@@ -3209,7 +3213,7 @@
auto slot_number = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
auto super_path = device_->GetSuperDevice(slot_number);
- if (!CreateLogicalAndSnapshotPartitions(super_path)) {
+ if (!CreateLogicalAndSnapshotPartitions(super_path, 20s)) {
LOG(ERROR) << "Unable to map partitions to complete merge.";
return false;
}
@@ -3355,7 +3359,7 @@
auto slot_suffix = device_->GetOtherSlotSuffix();
auto slot_number = SlotNumberForSlotSuffix(slot_suffix);
auto super_path = device_->GetSuperDevice(slot_number);
- if (!CreateLogicalAndSnapshotPartitions(super_path)) {
+ if (!CreateLogicalAndSnapshotPartitions(super_path, 20s)) {
LOG(ERROR) << "Unable to map partitions.";
return CreateResult::ERROR;
}
diff --git a/fs_mgr/libsnapshot/snapuserd.rc b/fs_mgr/libsnapshot/snapuserd.rc
index f2d21ac..4bf34a2 100644
--- a/fs_mgr/libsnapshot/snapuserd.rc
+++ b/fs_mgr/libsnapshot/snapuserd.rc
@@ -4,3 +4,4 @@
disabled
user root
group root system
+ seclabel u:r:snapuserd:s0