| // Copyright 2015 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "update_engine/payload_generator/payload_generation_config.h" |
| |
| #include <base/logging.h> |
| |
| #include "update_engine/delta_performer.h" |
| #include "update_engine/payload_generator/delta_diff_generator.h" |
| #include "update_engine/payload_generator/verity_utils.h" |
| #include "update_engine/utils.h" |
| |
| namespace chromeos_update_engine { |
| |
| bool ImageConfig::ValidateRootfsExists() const { |
| TEST_AND_RETURN_FALSE(!rootfs_part.empty()); |
| TEST_AND_RETURN_FALSE(utils::FileExists(rootfs_part.c_str())); |
| TEST_AND_RETURN_FALSE(rootfs_size > 0); |
| // The requested size is within the limits of the file. |
| TEST_AND_RETURN_FALSE(static_cast<off_t>(rootfs_size) <= |
| utils::FileSize(rootfs_part.c_str())); |
| return true; |
| } |
| |
| bool ImageConfig::ValidateKernelExists() const { |
| TEST_AND_RETURN_FALSE(!kernel_part.empty()); |
| TEST_AND_RETURN_FALSE(utils::FileExists(kernel_part.c_str())); |
| TEST_AND_RETURN_FALSE(kernel_size > 0); |
| TEST_AND_RETURN_FALSE(static_cast<off_t>(kernel_size) <= |
| utils::FileSize(kernel_part.c_str())); |
| return true; |
| } |
| |
| bool ImageConfig::ValidateIsEmpty() const { |
| TEST_AND_RETURN_FALSE(ImageInfoIsEmpty()); |
| |
| TEST_AND_RETURN_FALSE(rootfs_part.empty()); |
| TEST_AND_RETURN_FALSE(rootfs_size == 0); |
| TEST_AND_RETURN_FALSE(rootfs_mountpt.empty()); |
| TEST_AND_RETURN_FALSE(kernel_part.empty()); |
| TEST_AND_RETURN_FALSE(kernel_size == 0); |
| return true; |
| } |
| |
| bool ImageConfig::LoadImageSize() { |
| TEST_AND_RETURN_FALSE(!rootfs_part.empty()); |
| int rootfs_block_count, rootfs_block_size; |
| TEST_AND_RETURN_FALSE(utils::GetFilesystemSize(rootfs_part, |
| &rootfs_block_count, |
| &rootfs_block_size)); |
| rootfs_size = static_cast<uint64_t>(rootfs_block_count) * rootfs_block_size; |
| if (!kernel_part.empty()) |
| kernel_size = utils::FileSize(kernel_part); |
| |
| // TODO(deymo): The delta generator algorithm doesn't support a block size |
| // different than 4 KiB. Remove this check once that's fixed. crbug.com/455045 |
| if (rootfs_block_size != 4096) { |
| LOG(ERROR) << "The filesystem provided in " << rootfs_part |
| << " has a block size of " << rootfs_block_size |
| << " but delta_generator only supports 4096."; |
| return false; |
| } |
| return true; |
| } |
| |
| bool ImageConfig::LoadVerityRootfsSize() { |
| if (kernel_part.empty()) |
| return false; |
| uint64_t verity_rootfs_size = 0; |
| if (!GetVerityRootfsSize(kernel_part, &verity_rootfs_size)) { |
| LOG(INFO) << "Couldn't find verity options in source kernel config, will " |
| << "use the rootfs filesystem size instead: " << rootfs_size; |
| return false; |
| } |
| if (rootfs_size != verity_rootfs_size) { |
| LOG(WARNING) << "Using the rootfs size found in the kernel config (" |
| << verity_rootfs_size << ") instead of the rootfs filesystem " |
| << " size (" << rootfs_size << ")."; |
| rootfs_size = verity_rootfs_size; |
| } |
| return true; |
| } |
| |
| bool ImageConfig::ImageInfoIsEmpty() const { |
| return image_info.board().empty() |
| && image_info.key().empty() |
| && image_info.channel().empty() |
| && image_info.version().empty() |
| && image_info.build_channel().empty() |
| && image_info.build_version().empty(); |
| } |
| |
| bool PayloadGenerationConfig::Validate() const { |
| if (is_delta) { |
| TEST_AND_RETURN_FALSE(source.ValidateRootfsExists()); |
| TEST_AND_RETURN_FALSE(source.rootfs_size % block_size == 0); |
| |
| if (!source.kernel_part.empty()) { |
| TEST_AND_RETURN_FALSE(source.ValidateKernelExists()); |
| TEST_AND_RETURN_FALSE(source.kernel_size % block_size == 0); |
| } |
| |
| // For deltas, we also need to check that the image is mounted in order to |
| // inspect the contents. |
| TEST_AND_RETURN_FALSE(!source.rootfs_mountpt.empty()); |
| TEST_AND_RETURN_FALSE(utils::IsDir(source.rootfs_mountpt.c_str())); |
| |
| TEST_AND_RETURN_FALSE(!target.rootfs_mountpt.empty()); |
| TEST_AND_RETURN_FALSE(utils::IsDir(target.rootfs_mountpt.c_str())); |
| |
| // Check for the supported minor_version values. |
| TEST_AND_RETURN_FALSE(minor_version == kInPlaceMinorPayloadVersion || |
| minor_version == kSourceMinorPayloadVersion); |
| |
| // If new_image_info is present, old_image_info must be present. |
| TEST_AND_RETURN_FALSE(source.ImageInfoIsEmpty() == |
| target.ImageInfoIsEmpty()); |
| } else { |
| // All the "source" image fields must be empty for full payloads. |
| TEST_AND_RETURN_FALSE(source.ValidateIsEmpty()); |
| TEST_AND_RETURN_FALSE(minor_version == |
| DeltaPerformer::kFullPayloadMinorVersion); |
| } |
| |
| // In all cases, the target image must exists. |
| TEST_AND_RETURN_FALSE(target.ValidateRootfsExists()); |
| TEST_AND_RETURN_FALSE(target.ValidateKernelExists()); |
| TEST_AND_RETURN_FALSE(target.rootfs_size % block_size == 0); |
| TEST_AND_RETURN_FALSE(target.kernel_size % block_size == 0); |
| |
| TEST_AND_RETURN_FALSE(chunk_size == -1 || chunk_size % block_size == 0); |
| |
| TEST_AND_RETURN_FALSE(rootfs_partition_size % block_size == 0); |
| TEST_AND_RETURN_FALSE(rootfs_partition_size >= target.rootfs_size); |
| |
| return true; |
| } |
| |
| } // namespace chromeos_update_engine |