libsnapshot: Fix test failures on certain configurations.
Due to how CF is built and tested, VABC is enabled even when not
supported by the kernel. To work around this add some logic in
libsnapshot and the test harness to recognize this situation and
silently flip off the VABC flag.
This also fixes the -force_mode option to vts_libsnapshot_test, so that
it will skip tests that aren't supported by the device.
Bug: 264279496
Test: vts_libsnapshot_test on 11-5.4 with vabc enabled
Change-Id: I4c1e88fac54732c21c88169a7e0dd664e3858b89
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index 15f025c..f655522 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -3216,6 +3216,8 @@
vabc_disable_reason = "recovery";
} else if (!cow_format_support) {
vabc_disable_reason = "cow format not supported";
+ } else if (!KernelSupportsCompressedSnapshots()) {
+ vabc_disable_reason = "kernel missing userspace block device support";
}
if (!vabc_disable_reason.empty()) {
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index 13314da..460d49d 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -124,6 +124,10 @@
SKIP_IF_NON_VIRTUAL_AB();
SetupProperties();
+ if (!DeviceSupportsMode()) {
+ GTEST_SKIP() << "Mode not supported on this device";
+ }
+
InitializeState();
CleanupTestArtifacts();
FormatFakeSuper();
@@ -159,7 +163,13 @@
IPropertyFetcher::OverrideForTesting(std::move(fetcher));
if (GetLegacyCompressionEnabledProperty() || CanUseUserspaceSnapshots()) {
- snapuserd_required_ = true;
+ // If we're asked to test the device's actual configuration, then it
+ // may be misconfigured, so check for kernel support as libsnapshot does.
+ if (FLAGS_force_mode.empty()) {
+ snapuserd_required_ = KernelSupportsCompressedSnapshots();
+ } else {
+ snapuserd_required_ = true;
+ }
}
}
@@ -176,6 +186,16 @@
LOG(INFO) << "Teardown complete for test: " << test_name_;
}
+ bool DeviceSupportsMode() {
+ if (FLAGS_force_mode.empty()) {
+ return true;
+ }
+ if (snapuserd_required_ && !KernelSupportsCompressedSnapshots()) {
+ return false;
+ }
+ return true;
+ }
+
void InitializeState() {
ASSERT_TRUE(sm->EnsureImageManager());
image_manager_ = sm->image_manager();
@@ -193,6 +213,11 @@
// get an accurate list to remove.
lock_ = nullptr;
+ // If there is no image manager, the test was skipped.
+ if (!image_manager_) {
+ return;
+ }
+
std::vector<std::string> snapshots = {"test-snapshot", "test_partition_a",
"test_partition_b"};
for (const auto& snapshot : snapshots) {
@@ -946,6 +971,11 @@
SKIP_IF_NON_VIRTUAL_AB();
SnapshotTest::SetUp();
+ if (!image_manager_) {
+ // Test was skipped.
+ return;
+ }
+
Cleanup();
// Cleanup() changes slot suffix, so initialize it again.
@@ -2680,6 +2710,9 @@
CleanUp();
}
void CleanUp() {
+ if (!image_manager_) {
+ return;
+ }
EXPECT_TRUE(!image_manager_->BackingImageExists(kImageName) ||
image_manager_->DeleteBackingImage(kImageName));
}
diff --git a/fs_mgr/libsnapshot/utility.cpp b/fs_mgr/libsnapshot/utility.cpp
index a98bf0e..1ffa89c 100644
--- a/fs_mgr/libsnapshot/utility.cpp
+++ b/fs_mgr/libsnapshot/utility.cpp
@@ -29,6 +29,7 @@
#include <fs_mgr/roots.h>
#include <liblp/property_fetcher.h>
+using android::dm::DeviceMapper;
using android::dm::kSectorSize;
using android::fiemap::FiemapStatus;
using android::fs_mgr::EnsurePathMounted;
@@ -251,7 +252,10 @@
LOG(INFO) << "Userspace snapshots disabled for testing";
return false;
}
-
+ if (!KernelSupportsCompressedSnapshots()) {
+ LOG(ERROR) << "Userspace snapshots requested, but no kernel support is available.";
+ return false;
+ }
return true;
}
@@ -278,5 +282,10 @@
return fetcher->GetBoolProperty("snapuserd.test.dm.snapshots", false);
}
+bool KernelSupportsCompressedSnapshots() {
+ auto& dm = DeviceMapper::Instance();
+ return dm.GetTargetByName("user", nullptr);
+}
+
} // namespace snapshot
} // namespace android
diff --git a/fs_mgr/libsnapshot/utility.h b/fs_mgr/libsnapshot/utility.h
index 8c4c7c6..370f3c4 100644
--- a/fs_mgr/libsnapshot/utility.h
+++ b/fs_mgr/libsnapshot/utility.h
@@ -127,6 +127,8 @@
void AppendExtent(google::protobuf::RepeatedPtrField<chromeos_update_engine::Extent>* extents,
uint64_t start_block, uint64_t num_blocks);
+bool KernelSupportsCompressedSnapshots();
+
bool GetLegacyCompressionEnabledProperty();
bool GetUserspaceSnapshotsEnabledProperty();
bool GetIouringEnabledProperty();