AU: delta compress the kernel partition
Add kernel partition to proto buf. Change delta generator to compress
the kernel partition and the delta performer to perform operations to
update the kernel partition. Update unittests to test it.
Also, remove checksums from the protobuf while we're at it, since the
partitions themselves will contains checksums.
BUG=None
TEST=Attached unittest
Review URL: http://codereview.chromium.org/1819002
diff --git a/delta_performer.h b/delta_performer.h
index 4a096c2..cf75a67 100644
--- a/delta_performer.h
+++ b/delta_performer.h
@@ -20,10 +20,16 @@
public:
DeltaPerformer()
: fd_(-1),
+ kernel_fd_(-1),
manifest_valid_(false),
- next_operation_(0),
+ next_operation_num_(0),
buffer_offset_(0),
block_size_(0) {}
+
+ // Opens the kernel. Should be called before or after Open(), but before
+ // Write(). The kernel file will be close()d when Close() is called.
+ bool OpenKernel(const char* kernel_path);
+
// flags and mode ignored. Once Close()d, a DeltaPerformer can't be
// Open()ed again.
int Open(const char* path, int flags, mode_t mode);
@@ -33,6 +39,7 @@
ssize_t Write(const void* bytes, size_t count);
// Wrapper around close. Returns 0 on success or -errno on error.
+ // Closes both 'path' given to Open() and the kernel path.
int Close();
// Converts an ordered collection of Extent objects which contain data of
@@ -62,22 +69,29 @@
// These perform a specific type of operation and return true on success.
bool PerformReplaceOperation(
- const DeltaArchiveManifest_InstallOperation& operation);
+ const DeltaArchiveManifest_InstallOperation& operation,
+ bool is_kernel_partition);
bool PerformMoveOperation(
- const DeltaArchiveManifest_InstallOperation& operation);
+ const DeltaArchiveManifest_InstallOperation& operation,
+ bool is_kernel_partition);
bool PerformBsdiffOperation(
- const DeltaArchiveManifest_InstallOperation& operation);
+ const DeltaArchiveManifest_InstallOperation& operation,
+ bool is_kernel_partition);
// File descriptor of open device.
int fd_;
- std::string path_; // Path that fd_ refers to
+ // File descriptor of the kernel device
+ int kernel_fd_;
+
+ std::string path_; // Path that fd_ refers to.
+ std::string kernel_path_; // Path that kernel_fd_ refers to.
DeltaArchiveManifest manifest_;
bool manifest_valid_;
// Index of the next operation to perform in the manifest.
- int next_operation_;
+ int next_operation_num_;
// buffer_ is a window of the data that's been downloaded. At first,
// it contains the beginning of the download, but after the protobuf