liblp: Add a VIRTUAL_AB_DEVICE flag for LpMetadataHeader.
Bug: 134949511
Test: liblp_test gtests
Change-Id: I8b376d0980e1372086ed15b980209f3726ef651a
diff --git a/fs_mgr/liblp/builder.cpp b/fs_mgr/liblp/builder.cpp
index 4406696..7e7f393 100644
--- a/fs_mgr/liblp/builder.cpp
+++ b/fs_mgr/liblp/builder.cpp
@@ -1125,6 +1125,11 @@
auto_slot_suffixing_ = true;
}
+void MetadataBuilder::SetVirtualABDeviceFlag() {
+ RequireExpandedMetadataHeader();
+ header_.flags |= LP_HEADER_FLAG_VIRTUAL_AB_DEVICE;
+}
+
bool MetadataBuilder::IsABDevice() {
return !IPropertyFetcher::GetInstance()->GetProperty("ro.boot.slot_suffix", "").empty();
}
diff --git a/fs_mgr/liblp/include/liblp/builder.h b/fs_mgr/liblp/include/liblp/builder.h
index 7a334fb..851f041 100644
--- a/fs_mgr/liblp/include/liblp/builder.h
+++ b/fs_mgr/liblp/include/liblp/builder.h
@@ -318,6 +318,8 @@
// Set the LP_METADATA_AUTO_SLOT_SUFFIXING flag.
void SetAutoSlotSuffixing();
+ // Set the LP_HEADER_FLAG_VIRTUAL_AB_DEVICE flag.
+ void SetVirtualABDeviceFlag();
// If set, checks for slot suffixes will be ignored internally.
void IgnoreSlotSuffixing();
diff --git a/fs_mgr/liblp/include/liblp/metadata_format.h b/fs_mgr/liblp/include/liblp/metadata_format.h
index 26cbf07..d3c9874 100644
--- a/fs_mgr/liblp/include/liblp/metadata_format.h
+++ b/fs_mgr/liblp/include/liblp/metadata_format.h
@@ -224,8 +224,6 @@
/* 128: See LP_HEADER_FLAG_ constants for possible values. Header flags are
* independent of the version number and intended to be informational only.
* New flags can be added without bumping the version.
- *
- * (Note there are no flags currently defined.)
*/
uint32_t flags;
@@ -233,6 +231,11 @@
uint8_t reserved[124];
} __attribute__((packed)) LpMetadataHeader;
+/* This device uses Virtual A/B. Note that on retrofit devices, the expanded
+ * header may not be present.
+ */
+#define LP_HEADER_FLAG_VIRTUAL_AB_DEVICE 0x1
+
/* This struct defines a logical partition entry, similar to what would be
* present in a GUID Partition Table.
*/