Fix double-accounting bug in liblp.
When flashing in fastbootd, we create a new MetadataBuilder using the
given super_empty.img and attempt to import the existing partition
table. This will fail if there is some incompatibility in the partition
layout or partition quotas.
This import code was accidentally double-accounting partitions when
determining if they could fit within the group quota, preventing
"fastboot flashall" once partitions reached a certain size.
Bug: 126930319
Test: liblp_test gtest
Change-Id: I89a69cba110b62719197c9a4885cfc5bcf8f009f
diff --git a/fs_mgr/liblp/builder.cpp b/fs_mgr/liblp/builder.cpp
index c39fbe7..ebd6997 100644
--- a/fs_mgr/liblp/builder.cpp
+++ b/fs_mgr/liblp/builder.cpp
@@ -550,11 +550,11 @@
}
bool MetadataBuilder::ValidatePartitionSizeChange(Partition* partition, uint64_t old_size,
- uint64_t new_size) {
+ uint64_t new_size, bool force_check) {
PartitionGroup* group = FindGroup(partition->group_name());
CHECK(group);
- if (new_size <= old_size) {
+ if (!force_check && new_size <= old_size) {
return true;
}
@@ -861,7 +861,7 @@
uint64_t aligned_size = AlignTo(requested_size, geometry_.logical_block_size);
uint64_t old_size = partition->size();
- if (!ValidatePartitionSizeChange(partition, old_size, aligned_size)) {
+ if (!ValidatePartitionSizeChange(partition, old_size, aligned_size, false)) {
return false;
}
@@ -973,7 +973,12 @@
ImportExtents(partition, metadata, source);
- if (!ValidatePartitionSizeChange(partition, 0, partition->size())) {
+ // Note: we've already increased the partition size by calling
+ // ImportExtents(). In order to figure out the size before that,
+ // we would have to iterate the extents and add up the linear
+ // segments. Instead, we just force ValidatePartitionSizeChange
+ // to check if the current configuration is acceptable.
+ if (!ValidatePartitionSizeChange(partition, partition->size(), partition->size(), true)) {
partition->RemoveExtents();
return false;
}
diff --git a/fs_mgr/liblp/builder_test.cpp b/fs_mgr/liblp/builder_test.cpp
index 69724f8..81305b3 100644
--- a/fs_mgr/liblp/builder_test.cpp
+++ b/fs_mgr/liblp/builder_test.cpp
@@ -835,3 +835,73 @@
EXPECT_EQ(exported->extents[1].target_data, 4608);
EXPECT_EQ(exported->extents[1].num_sectors, 1536);
}
+
+TEST_F(BuilderTest, UpdateSuper) {
+ // Build the on-disk metadata that we saw before flashing.
+ auto builder = MetadataBuilder::New(8145338368ULL, 65536, 3);
+ ASSERT_NE(builder, nullptr);
+
+ ASSERT_TRUE(builder->AddGroup("google_dynamic_partitions_a", 4068474880ULL));
+ ASSERT_TRUE(builder->AddGroup("google_dynamic_partitions_b", 4068474880ULL));
+
+ Partition* partition = builder->AddPartition("system_a", "google_dynamic_partitions_a",
+ LP_PARTITION_ATTR_READONLY);
+ ASSERT_NE(partition, nullptr);
+ ASSERT_TRUE(builder->AddLinearExtent(partition, "super", 1901568, 3608576));
+
+ partition = builder->AddPartition("vendor_a", "google_dynamic_partitions_a",
+ LP_PARTITION_ATTR_READONLY);
+ ASSERT_NE(partition, nullptr);
+ ASSERT_TRUE(builder->AddLinearExtent(partition, "super", 1521664, 5510144));
+
+ partition = builder->AddPartition("product_a", "google_dynamic_partitions_a",
+ LP_PARTITION_ATTR_READONLY);
+ ASSERT_NE(partition, nullptr);
+ ASSERT_TRUE(builder->AddLinearExtent(partition, "super", 3606528, 2048));
+
+ partition = builder->AddPartition("system_b", "google_dynamic_partitions_b",
+ LP_PARTITION_ATTR_READONLY);
+ ASSERT_NE(partition, nullptr);
+ ASSERT_TRUE(builder->AddLinearExtent(partition, "super", 1901568, 7955456));
+
+ partition = builder->AddPartition("vendor_b", "google_dynamic_partitions_b",
+ LP_PARTITION_ATTR_READONLY);
+ ASSERT_NE(partition, nullptr);
+ ASSERT_TRUE(builder->AddLinearExtent(partition, "super", 1521664, 9857024));
+
+ partition = builder->AddPartition("product_b", "google_dynamic_partitions_b",
+ LP_PARTITION_ATTR_READONLY);
+ ASSERT_NE(partition, nullptr);
+ ASSERT_TRUE(builder->AddLinearExtent(partition, "super", 3606528, 11378688));
+
+ auto on_disk = builder->Export();
+ ASSERT_NE(on_disk, nullptr);
+
+ // Build the super_empty from the new build.
+ builder = MetadataBuilder::New(8145338368ULL, 65536, 3);
+ ASSERT_NE(builder, nullptr);
+
+ ASSERT_TRUE(builder->AddGroup("google_dynamic_partitions_a", 4068474880ULL));
+ ASSERT_TRUE(builder->AddGroup("google_dynamic_partitions_b", 4068474880ULL));
+ ASSERT_NE(builder->AddPartition("system_a", "google_dynamic_partitions_a",
+ LP_PARTITION_ATTR_READONLY),
+ nullptr);
+ ASSERT_NE(builder->AddPartition("system_b", "google_dynamic_partitions_b",
+ LP_PARTITION_ATTR_READONLY),
+ nullptr);
+ ASSERT_NE(builder->AddPartition("vendor_a", "google_dynamic_partitions_a",
+ LP_PARTITION_ATTR_READONLY),
+ nullptr);
+ ASSERT_NE(builder->AddPartition("vendor_b", "google_dynamic_partitions_b",
+ LP_PARTITION_ATTR_READONLY),
+ nullptr);
+ ASSERT_NE(builder->AddPartition("product_a", "google_dynamic_partitions_a",
+ LP_PARTITION_ATTR_READONLY),
+ nullptr);
+ ASSERT_NE(builder->AddPartition("product_b", "google_dynamic_partitions_b",
+ LP_PARTITION_ATTR_READONLY),
+ nullptr);
+
+ std::set<std::string> partitions_to_keep{"system_a", "vendor_a", "product_a"};
+ ASSERT_TRUE(builder->ImportPartitions(*on_disk.get(), partitions_to_keep));
+}
diff --git a/fs_mgr/liblp/include/liblp/builder.h b/fs_mgr/liblp/include/liblp/builder.h
index 53f480f..486a71f 100644
--- a/fs_mgr/liblp/include/liblp/builder.h
+++ b/fs_mgr/liblp/include/liblp/builder.h
@@ -297,7 +297,8 @@
uint64_t TotalSizeOfGroup(PartitionGroup* group) const;
bool UpdateBlockDeviceInfo(size_t index, const BlockDeviceInfo& info);
bool FindBlockDeviceByName(const std::string& partition_name, uint32_t* index) const;
- bool ValidatePartitionSizeChange(Partition* partition, uint64_t old_size, uint64_t new_size);
+ bool ValidatePartitionSizeChange(Partition* partition, uint64_t old_size, uint64_t new_size,
+ bool force_check);
void ImportExtents(Partition* dest, const LpMetadata& metadata,
const LpMetadataPartition& source);
bool ImportPartition(const LpMetadata& metadata, const LpMetadataPartition& source);