update_engine resize dynamic partitions during OTA.
update_engine uses device mapper to resize dynamic partitions
before opening the devices to apply the update.
* DeltaPerformer calls BootControlInterface::InitPartitionMetadata
when parsing the update manifest. The implementation for
BootControlAndroid::InitPartitionMetadata does the following
if sizes for dynamic partitions are incorrect (assuming updating
from slot A to B):
* Load metadata from metadata slot A
* Delete all extents of partitions at slot B (with _b suffix)
* Add extents for partitions at slot B
* Write metadata to metadata slot B
* Re-map all partitions at slot B using metadata slot B with
force_writable = true
* BootControlAndroid::GetPartitionDevice() checks device-mapper
before returning static partitions.
* PostinstallRunnerAction::Cleanup calls BootControlInterface::Cleanup
which unmaps all partitions at slot B.
A partition "foo" is considered dynamic if foo_a exists as a dynamic
partition OR foo_b does NOT exist as a static partition.
Bug: 110717529
Test: manual ota
Test: update_engine_unittests --gtest_filter=*BootControlAndroid*
Change-Id: I50f410b486a874242663624801c3694151bdda18
diff --git a/payload_consumer/filesystem_verifier_action.cc b/payload_consumer/filesystem_verifier_action.cc
index a5e1e61..d74d81d 100644
--- a/payload_consumer/filesystem_verifier_action.cc
+++ b/payload_consumer/filesystem_verifier_action.cc
@@ -98,13 +98,25 @@
partition_size_ = partition.target_size;
break;
}
- LOG(INFO) << "Hashing partition " << partition_index_ << " ("
- << partition.name << ") on device " << part_path;
+
if (part_path.empty()) {
+ if (partition_size_ == 0) {
+ LOG(INFO) << "Skip hashing partition " << partition_index_ << " ("
+ << partition.name << ") because size is 0.";
+ partition_index_++;
+ StartPartitionHashing();
+ return;
+ }
+ LOG(ERROR) << "Cannot hash partition " << partition_index_ << " ("
+ << partition.name
+ << ") because its device path cannot be determined.";
Cleanup(ErrorCode::kFilesystemVerifierError);
return;
}
+ LOG(INFO) << "Hashing partition " << partition_index_ << " ("
+ << partition.name << ") on device " << part_path;
+
brillo::ErrorPtr error;
src_stream_ = brillo::FileStream::Open(
base::FilePath(part_path),