Merge "Add static_assert to check sizeof off_t" into main
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
index c9a4dee..aac71de 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
@@ -143,6 +143,42 @@
uint64_t source;
} __attribute__((packed));
+// The on disk format of cow (currently == CowOperation)
+struct CowOperationV2 {
+ // The operation code (see the constants and structures below).
+ uint8_t type;
+
+ // If this operation reads from the data section of the COW, this contains
+ // the compression type of that data (see constants below).
+ uint8_t compression;
+
+ // If this operation reads from the data section of the COW, this contains
+ // the length.
+ uint16_t data_length;
+
+ // The block of data in the new image that this operation modifies.
+ uint64_t new_block;
+
+ // The value of |source| depends on the operation code.
+ //
+ // For copy operations, this is a block location in the source image.
+ //
+ // For replace operations, this is a byte offset within the COW's data
+ // sections (eg, not landing within the header or metadata). It is an
+ // absolute position within the image.
+ //
+ // For zero operations (replace with all zeroes), this is unused and must
+ // be zero.
+ //
+ // For Label operations, this is the value of the applied label.
+ //
+ // For Cluster operations, this is the length of the following data region
+ //
+ // For Xor operations, this is the byte location in the source image.
+ uint64_t source;
+} __attribute__((packed));
+
+static_assert(sizeof(CowOperationV2) == sizeof(CowOperation));
static_assert(sizeof(CowOperation) == sizeof(CowFooterOperation));
static constexpr uint8_t kCowCopyOp = 1;
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_reader.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_reader.h
index f4ce52f..67d301d 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_reader.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_reader.h
@@ -165,7 +165,6 @@
void UpdateMergeOpsCompleted(int num_merge_ops) { header_.num_merge_ops += num_merge_ops; }
private:
- bool ParseOps(std::optional<uint64_t> label);
bool PrepMergeOps();
uint64_t FindNumCopyops();
uint8_t GetCompressionType(const CowOperation* op);