| // Copyright 2018 The Fuchsia 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 <dirent.h> |
| #include <fcntl.h> |
| |
| #include <chromeos-disk-setup/chromeos-disk-setup.h> |
| #include <fbl/auto_call.h> |
| #include <fs-management/fvm.h> |
| #include <gpt/cros.h> |
| #include <zircon/device/device.h> |
| #include <zxcrypt/volume.h> |
| |
| #include "device-partitioner.h" |
| #include "pave-logging.h" |
| |
| namespace paver { |
| |
| namespace { |
| |
| bool KernelFilterCallback(const gpt_partition_t& part, fbl::StringPiece partition_name) { |
| const uint8_t kern_type[GPT_GUID_LEN] = GUID_CROS_KERNEL_VALUE; |
| char cstring_name[GPT_NAME_LEN]; |
| utf16_to_cstring(cstring_name, reinterpret_cast<const uint16_t*>(part.name), GPT_NAME_LEN); |
| return memcmp(part.type, kern_type, GPT_GUID_LEN) == 0 && |
| strncmp(cstring_name, partition_name.data(), partition_name.length()) == 0; |
| } |
| |
| bool FvmFilterCallback(const gpt_partition_t& part) { |
| const uint8_t partition_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| return memcmp(part.type, partition_type, GPT_GUID_LEN) == 0; |
| } |
| |
| constexpr size_t ReservedHeaderBlocks(size_t blk_size) { |
| constexpr size_t kReservedEntryBlocks = (16 * 1024); |
| return (kReservedEntryBlocks + 2 * blk_size) / blk_size; |
| }; |
| |
| constexpr char kFvmPartitionName[] = "fvm"; |
| |
| // Helper function to auto-deduce type. |
| template <typename T> |
| fbl::unique_ptr<T> WrapUnique(T* ptr) { |
| return fbl::unique_ptr<T>(ptr); |
| } |
| |
| } // namespace |
| |
| fbl::unique_ptr<DevicePartitioner> DevicePartitioner::Create() { |
| fbl::unique_ptr<DevicePartitioner> device_partitioner; |
| #if defined(__x86_64__) |
| if ((CrosDevicePartitioner::Initialize(&device_partitioner) == ZX_OK) || |
| (EfiDevicePartitioner::Initialize(&device_partitioner) == ZX_OK)) { |
| return fbl::move(device_partitioner); |
| } |
| #elif defined(__aarch64__) |
| if ((NandDevicePartitioner::Initialize(&device_partitioner) == ZX_OK) || |
| (FixedDevicePartitioner::Initialize(&device_partitioner) == ZX_OK)) { |
| return fbl::move(device_partitioner); |
| } |
| #endif |
| return nullptr; |
| } |
| |
| /*====================================================* |
| * GPT Common * |
| *====================================================*/ |
| |
| bool GptDevicePartitioner::FindTargetGptPath(fbl::String* out) { |
| constexpr char kBlockDevPath[] = "/dev/class/block"; |
| DIR* d = opendir(kBlockDevPath); |
| if (d == nullptr) { |
| ERROR("Cannot inspect block devices\n"); |
| return false; |
| } |
| const auto closer = fbl::MakeAutoCall([&]() { closedir(d); }); |
| |
| struct dirent* de; |
| while ((de = readdir(d)) != nullptr) { |
| fbl::unique_fd fd(openat(dirfd(d), de->d_name, O_RDWR)); |
| if (!fd) { |
| continue; |
| } |
| out->Set(PATH_MAX, '\0'); |
| ssize_t r = ioctl_device_get_topo_path(fd.get(), const_cast<char*>(out->data()), PATH_MAX); |
| if (r < 0) { |
| continue; |
| } |
| |
| block_info_t info; |
| if ((r = ioctl_block_get_info(fd.get(), &info) < 0)) { |
| continue; |
| } |
| |
| // TODO(ZX-1344): This is a hack, but practically, will work for our |
| // usage. |
| // |
| // The GPT which will contain an FVM should be the first non-removable |
| // block device that isn't a partition itself. |
| if (!(info.flags & BLOCK_FLAG_REMOVABLE) && strstr(out->c_str(), "part-") == nullptr) { |
| return true; |
| } |
| } |
| |
| ERROR("No candidate GPT found\n"); |
| return false; |
| } |
| |
| zx_status_t GptDevicePartitioner::InitializeGpt(fbl::unique_ptr<GptDevicePartitioner>* gpt_out) { |
| fbl::String gpt_path; |
| if (!FindTargetGptPath(&gpt_path)) { |
| ERROR("Failed to find GPT\n"); |
| return ZX_ERR_NOT_FOUND; |
| } |
| fbl::unique_fd fd(open(gpt_path.c_str(), O_RDWR)); |
| if (!fd) { |
| ERROR("Failed to open GPT\n"); |
| return ZX_ERR_NOT_FOUND; |
| } |
| block_info_t block_info; |
| ssize_t rc = ioctl_block_get_info(fd.get(), &block_info); |
| if (rc < 0) { |
| ERROR("Couldn't get GPT block info\n"); |
| return ZX_ERR_NOT_FOUND; |
| } |
| |
| gpt_device_t* gpt; |
| if (gpt_device_init(fd.get(), block_info.block_size, block_info.block_count, &gpt)) { |
| ERROR("Failed to get GPT info\n"); |
| return ZX_ERR_BAD_STATE; |
| } |
| |
| auto releaser = fbl::MakeAutoCall([&]() { gpt_device_release(gpt); }); |
| if (!gpt->valid) { |
| ERROR("Located GPT is invalid; Attempting to initialize\n"); |
| if (gpt_partition_remove_all(gpt)) { |
| ERROR("Failed to create empty GPT\n"); |
| return ZX_ERR_BAD_STATE; |
| } else if (gpt_device_sync(gpt)) { |
| ERROR("Failed to sync empty GPT\n"); |
| return ZX_ERR_BAD_STATE; |
| } else if ((rc = ioctl_block_rr_part(fd.get())) != ZX_OK) { |
| ERROR("Failed to re-read GPT\n"); |
| return ZX_ERR_BAD_STATE; |
| } |
| } |
| |
| releaser.cancel(); |
| *gpt_out = fbl::move(WrapUnique(new GptDevicePartitioner(fbl::move(fd), gpt, block_info))); |
| return ZX_OK; |
| } |
| |
| struct PartitionPosition { |
| size_t start; // Block, inclusive |
| size_t length; // In Blocks |
| }; |
| |
| zx_status_t GptDevicePartitioner::FindFirstFit(size_t bytes_requested, size_t* start_out, |
| size_t* length_out) const { |
| LOG("Looking for space\n"); |
| // Gather GPT-related information. |
| size_t blocks_requested = |
| (bytes_requested + block_info_.block_size - 1) / block_info_.block_size; |
| |
| // Sort all partitions by starting block. |
| // For simplicity, include the 'start' and 'end' reserved spots as |
| // partitions. |
| size_t partition_count = 0; |
| PartitionPosition partitions[PARTITIONS_COUNT + 2]; |
| const size_t reserved_blocks = ReservedHeaderBlocks(block_info_.block_size); |
| partitions[partition_count].start = 0; |
| partitions[partition_count++].length = reserved_blocks; |
| partitions[partition_count].start = block_info_.block_count - reserved_blocks; |
| partitions[partition_count++].length = reserved_blocks; |
| |
| for (size_t i = 0; i < PARTITIONS_COUNT; i++) { |
| const gpt_partition_t* p = gpt_->partitions[i]; |
| if (!p) { |
| continue; |
| } |
| partitions[partition_count].start = p->first; |
| partitions[partition_count].length = p->last - p->first + 1; |
| LOG("Partition seen with start %zu, end %zu (length %zu)\n", p->first, p->last, |
| partitions[partition_count].length); |
| partition_count++; |
| } |
| LOG("Sorting\n"); |
| qsort(partitions, partition_count, sizeof(PartitionPosition), |
| [](const void* p1, const void* p2) { |
| ssize_t s1 = static_cast<ssize_t>(static_cast<const PartitionPosition*>(p1)->start); |
| ssize_t s2 = static_cast<ssize_t>(static_cast<const PartitionPosition*>(p2)->start); |
| return static_cast<int>(s1 - s2); |
| }); |
| |
| // Look for space between the partitions. Since the reserved spots of the |
| // GPT were included in |partitions|, all available space will be located |
| // "between" partitions. |
| for (size_t i = 0; i < partition_count - 1; i++) { |
| const size_t next = partitions[i].start + partitions[i].length; |
| LOG("Partition[%zu] From Block [%zu, %zu) ... (next partition starts at block %zu)\n", |
| i, partitions[i].start, next, partitions[i + 1].start); |
| |
| if (next > partitions[i + 1].start) { |
| ERROR("Corrupted GPT\n"); |
| return ZX_ERR_IO; |
| } |
| const size_t free_blocks = partitions[i + 1].start - next; |
| LOG(" There are %zu free blocks (%zu requested)\n", free_blocks, blocks_requested); |
| if (free_blocks >= blocks_requested) { |
| *start_out = next; |
| *length_out = free_blocks; |
| return ZX_OK; |
| } |
| } |
| ERROR("No GPT space found\n"); |
| return ZX_ERR_NO_RESOURCES; |
| } |
| |
| zx_status_t GptDevicePartitioner::CreateGptPartition(const char* name, uint8_t* type, |
| uint64_t offset, uint64_t blocks, |
| uint8_t* out_guid) { |
| zx_cprng_draw(out_guid, GPT_GUID_LEN); |
| |
| zx_status_t status; |
| if ((status = gpt_partition_add(gpt_, name, type, out_guid, offset, blocks, 0))) { |
| ERROR("Failed to add partition\n"); |
| return ZX_ERR_IO; |
| } |
| if ((status = gpt_device_sync(gpt_))) { |
| ERROR("Failed to sync GPT\n"); |
| return ZX_ERR_IO; |
| } |
| if ((status = gpt_partition_clear(gpt_, offset, 1))) { |
| ERROR("Failed to clear first block of new partition\n"); |
| return ZX_ERR_IO; |
| } |
| if ((status = static_cast<zx_status_t>(ioctl_block_rr_part(fd_.get()))) < 0) { |
| ERROR("Failed to rebind GPT\n"); |
| return status; |
| } |
| |
| return ZX_OK; |
| } |
| |
| zx_status_t GptDevicePartitioner::AddPartition( |
| const char* name, uint8_t* type, size_t minimum_size_bytes, |
| size_t optional_reserve_bytes, fbl::unique_fd* out_fd) { |
| |
| uint64_t start, length; |
| zx_status_t status; |
| if ((status = FindFirstFit(minimum_size_bytes, &start, &length)) != ZX_OK) { |
| ERROR("Couldn't find fit\n"); |
| return status; |
| } |
| LOG("Found space in GPT - OK %zu @ %zu\n", length, start); |
| |
| if (optional_reserve_bytes) { |
| // If we can fulfill the requested size, and we still have space for the |
| // optional reserve section, then we should shorten the amount of blocks |
| // we're asking for. |
| // |
| // This isn't necessary, but it allows growing the GPT later, if necessary. |
| const size_t optional_reserve_blocks = optional_reserve_bytes / block_info_.block_size; |
| if (length - optional_reserve_bytes > (minimum_size_bytes / block_info_.block_size)) { |
| LOG("Space for reserve - OK\n"); |
| length -= optional_reserve_blocks; |
| } |
| } else { |
| length = fbl::round_up(minimum_size_bytes, block_info_.block_size) / block_info_.block_size; |
| } |
| LOG("Final space in GPT - OK %zu @ %zu\n", length, start); |
| |
| uint8_t guid[GPT_GUID_LEN]; |
| if ((status = CreateGptPartition(name, type, start, length, guid)) != ZX_OK) { |
| return status; |
| } |
| LOG("Added partition, waiting for bind\n"); |
| |
| out_fd->reset(open_partition(guid, type, ZX_SEC(5), nullptr)); |
| if (!*out_fd) { |
| ERROR("Added partition, waiting for bind - NOT FOUND\n"); |
| return ZX_ERR_IO; |
| } |
| LOG("Added partition, waiting for bind - OK\n"); |
| return ZX_OK; |
| } |
| |
| zx_status_t GptDevicePartitioner::FindPartition(FilterCallback filter, gpt_partition_t** out, |
| fbl::unique_fd* out_fd) { |
| for (size_t i = 0; i < PARTITIONS_COUNT; i++) { |
| gpt_partition_t* p = gpt_->partitions[i]; |
| if (!p) { |
| continue; |
| } |
| |
| if (filter(*p)) { |
| LOG("Found partition in GPT, partition %zu\n", i); |
| if (out) { |
| *out = p; |
| } |
| if (out_fd) { |
| out_fd->reset(open_partition(p->guid, p->type, ZX_SEC(5), nullptr)); |
| if (!*out_fd) { |
| ERROR("Couldn't open partition\n"); |
| return ZX_ERR_IO; |
| } |
| } |
| return ZX_OK; |
| } |
| } |
| return ZX_ERR_NOT_FOUND; |
| } |
| |
| zx_status_t GptDevicePartitioner::FindPartition(FilterCallback filter, |
| fbl::unique_fd* out_fd) const { |
| for (size_t i = 0; i < PARTITIONS_COUNT; i++) { |
| const gpt_partition_t* p = gpt_->partitions[i]; |
| if (!p) { |
| continue; |
| } |
| |
| if (filter(*p)) { |
| LOG("Found partition in GPT, partition %zu\n", i); |
| if (out_fd) { |
| out_fd->reset(open_partition(p->guid, p->type, ZX_SEC(5), nullptr)); |
| if (!*out_fd) { |
| ERROR("Couldn't open partition\n"); |
| return ZX_ERR_IO; |
| } |
| } |
| return ZX_OK; |
| } |
| } |
| return ZX_ERR_NOT_FOUND; |
| } |
| |
| zx_status_t GptDevicePartitioner::WipePartitions(FilterCallback filter) { |
| bool modify = false; |
| for (size_t i = 0; i < PARTITIONS_COUNT; i++) { |
| const gpt_partition_t* p = gpt_->partitions[i]; |
| if (!p) { |
| continue; |
| } |
| if (!filter(*p)) { |
| continue; |
| } |
| |
| modify = true; |
| |
| // Overwrite the first 8k to (hackily) ensure the destroyed partition |
| // doesn't "reappear" in place. |
| char buf[8192]; |
| memset(buf, 0, sizeof(buf)); |
| fbl::unique_fd pfd(open_partition(p->guid, p->type, ZX_SEC(2), nullptr)); |
| if (!pfd) { |
| ERROR("Warning: Could not open partition to overwrite first 8KB\n"); |
| } else { |
| write(pfd.get(), buf, sizeof(buf)); |
| } |
| |
| if (gpt_partition_remove(gpt_, p->guid)) { |
| ERROR("Warning: Could not remove partition\n"); |
| } else { |
| // If we successfully clear the partition, then all subsequent |
| // partitions get shifted down. If we just deleted partition 'i', |
| // we now need to look at partition 'i' again, since it's now |
| // occupied by what was in 'i+1'. |
| i--; |
| } |
| } |
| if (modify) { |
| gpt_device_sync(gpt_); |
| LOG("GPT updated, reboot strongly recommended immediately\n"); |
| } |
| ioctl_block_rr_part(fd_.get()); |
| return ZX_OK; |
| } |
| |
| /*====================================================* |
| * EFI SPECIFIC * |
| *====================================================*/ |
| |
| zx_status_t EfiDevicePartitioner::Initialize(fbl::unique_ptr<DevicePartitioner>* partitioner) { |
| fbl::unique_ptr<GptDevicePartitioner> gpt; |
| zx_status_t status; |
| if ((status = GptDevicePartitioner::InitializeGpt(&gpt)) != ZX_OK) { |
| return status; |
| } |
| if (is_cros(gpt->GetGpt())) { |
| ERROR("Use CrOS Device Partitioner."); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| LOG("Successfully intitialized EFI Device Partitioner\n"); |
| *partitioner = fbl::move(WrapUnique(new EfiDevicePartitioner(fbl::move(gpt)))); |
| return ZX_OK; |
| } |
| |
| // Name used by previous Fuchsia Installer. |
| constexpr char kOldEfiName[] = "EFI"; |
| |
| // Name used for EFI partitions added by paver. |
| constexpr char kEfiName[] = "EFI Gigaboot"; |
| |
| zx_status_t EfiDevicePartitioner::AddPartition(Partition partition_type, fbl::unique_fd* out_fd) { |
| const char* name; |
| uint8_t type[GPT_GUID_LEN]; |
| size_t minimum_size_bytes = 0; |
| size_t optional_reserve_bytes = 0; |
| |
| switch (partition_type) { |
| case Partition::kEfi: { |
| const uint8_t efi_type[GPT_GUID_LEN] = GUID_EFI_VALUE; |
| memcpy(type, efi_type, GPT_GUID_LEN); |
| minimum_size_bytes = 1LU * (1 << 30); |
| name = kEfiName; |
| break; |
| } |
| case Partition::kFuchsiaVolumeManager: { |
| const uint8_t fvm_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| memcpy(type, fvm_type, GPT_GUID_LEN); |
| minimum_size_bytes = 8LU * (1 << 30); |
| name = kFvmPartitionName; |
| break; |
| } |
| default: |
| ERROR("EFI partitioner cannot add unknown partition type\n"); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| return gpt_->AddPartition(name, type, minimum_size_bytes, |
| optional_reserve_bytes, out_fd); |
| } |
| |
| bool EfiDevicePartitioner::FilterZirconPartition(const block_info_t& info, |
| const gpt_partition_t& part) { |
| const uint8_t efi_type[GPT_GUID_LEN] = GUID_EFI_VALUE; |
| char cstring_name[GPT_NAME_LEN]; |
| utf16_to_cstring(cstring_name, reinterpret_cast<const uint16_t*>(part.name), GPT_NAME_LEN); |
| // Old EFI: Installed by the legacy Fuchsia installer, identified by |
| // large size and "EFI" label. |
| constexpr unsigned int k512MB = (1LU << 29); |
| const bool old_efi = strncmp(cstring_name, kOldEfiName, strlen(kOldEfiName)) == 0 && |
| ((part.last - part.first + 1) * info.block_size) > k512MB; |
| // Disk-paved EFI: Identified by "EFI Gigaboot" label. |
| const bool new_efi = strncmp(cstring_name, kEfiName, strlen(kEfiName)) == 0; |
| return memcmp(part.type, efi_type, GPT_GUID_LEN) == 0 && (old_efi || new_efi); |
| } |
| |
| zx_status_t EfiDevicePartitioner::FindPartition(Partition partition_type, |
| fbl::unique_fd* out_fd) const { |
| block_info_t info; |
| zx_status_t status; |
| if ((status = gpt_->GetBlockInfo(&info)) != ZX_OK) { |
| ERROR("Unable to get block info\n"); |
| return ZX_ERR_IO; |
| } |
| |
| switch (partition_type) { |
| case Partition::kEfi: { |
| const auto filter = [&info](const gpt_partition_t& part) { |
| return FilterZirconPartition(info, part); |
| }; |
| return gpt_->FindPartition(filter, out_fd); |
| } |
| case Partition::kFuchsiaVolumeManager: |
| return gpt_->FindPartition(FvmFilterCallback, out_fd); |
| |
| default: |
| ERROR("EFI partitioner cannot find unknown partition type\n"); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| } |
| |
| zx_status_t EfiDevicePartitioner::WipePartitions(const fbl::Vector<Partition>& partitions) { |
| const uint8_t fvm_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| const uint8_t install_type[GPT_GUID_LEN] = GUID_INSTALL_VALUE; |
| const uint8_t system_type[GPT_GUID_LEN] = GUID_SYSTEM_VALUE; |
| const uint8_t blob_type[GPT_GUID_LEN] = GUID_BLOB_VALUE; |
| const uint8_t data_type[GPT_GUID_LEN] = GUID_DATA_VALUE; |
| |
| block_info_t info; |
| zx_status_t status; |
| if ((status = gpt_->GetBlockInfo(&info)) != ZX_OK) { |
| ERROR("Unable to get block info\n"); |
| return ZX_ERR_IO; |
| } |
| |
| fbl::Vector<const uint8_t*> partition_list; |
| bool efi = false; |
| for (const Partition& partition_type : partitions) { |
| switch (partition_type) { |
| case Partition::kEfi: { |
| // Special case. |
| efi = true; |
| break; |
| } |
| case Partition::kKernelC: |
| break; |
| case Partition::kFuchsiaVolumeManager: |
| partition_list.push_back(fvm_type); |
| break; |
| case Partition::kInstallType: |
| partition_list.push_back(install_type); |
| break; |
| case Partition::kSystem: |
| partition_list.push_back(system_type); |
| break; |
| case Partition::kBlob: |
| partition_list.push_back(blob_type); |
| break; |
| case Partition::kData: |
| partition_list.push_back(data_type); |
| break; |
| default: |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| } |
| |
| // Early return if nothing to wipe. |
| if (partition_list.is_empty() && !efi) { |
| return ZX_OK; |
| } |
| |
| const auto filter = [&info, &partition_list, efi](const gpt_partition_t& part) { |
| for (const auto& type : partition_list) { |
| if (memcmp(part.type, type, GPT_GUID_LEN) == 0) |
| return true; |
| } |
| if (efi) { |
| return FilterZirconPartition(info, part); |
| } |
| return false; |
| }; |
| return gpt_->WipePartitions(filter); |
| } |
| |
| /*====================================================* |
| * CROS SPECIFIC * |
| *====================================================*/ |
| |
| zx_status_t CrosDevicePartitioner::Initialize(fbl::unique_ptr<DevicePartitioner>* partitioner) { |
| fbl::unique_ptr<GptDevicePartitioner> gpt_partitioner; |
| zx_status_t status; |
| if ((status = GptDevicePartitioner::InitializeGpt(&gpt_partitioner)) != ZX_OK) { |
| return status; |
| } |
| |
| gpt_device_t* gpt = gpt_partitioner->GetGpt(); |
| if (!is_cros(gpt)) { |
| return ZX_ERR_NOT_FOUND; |
| } |
| |
| block_info_t info; |
| gpt_partitioner->GetBlockInfo(&info); |
| |
| if (!is_ready_to_pave(gpt, &info, SZ_ZX_PART, SZ_ROOT_PART, true)) { |
| if ((status = config_cros_for_fuchsia(gpt, &info, SZ_ZX_PART, SZ_ROOT_PART, |
| true)) != ZX_OK) { |
| ERROR("Failed to configure CrOS for Fuchsia.\n"); |
| return status; |
| } |
| gpt_device_sync(gpt); |
| ioctl_block_rr_part(gpt_partitioner->GetFd()); |
| } |
| |
| LOG("Successfully initialized CrOS Device Partitioner\n"); |
| *partitioner = fbl::move(WrapUnique(new CrosDevicePartitioner(fbl::move(gpt_partitioner)))); |
| return ZX_OK; |
| } |
| |
| constexpr char kKernaName[] = "KERN-A"; |
| constexpr char kKernbName[] = "KERN-B"; |
| constexpr char kKerncName[] = "KERN-C"; |
| |
| zx_status_t CrosDevicePartitioner::AddPartition(Partition partition_type, |
| fbl::unique_fd* out_fd) { |
| const char* name; |
| uint8_t type[GPT_GUID_LEN]; |
| size_t minimum_size_bytes = 0; |
| size_t optional_reserve_bytes = 0; |
| |
| switch (partition_type) { |
| case Partition::kKernelC: { |
| const uint8_t kernc_type[GPT_GUID_LEN] = GUID_CROS_KERNEL_VALUE; |
| memcpy(type, kernc_type, GPT_GUID_LEN); |
| minimum_size_bytes = 64LU * (1 << 20); |
| name = kKerncName; |
| break; |
| } |
| case Partition::kFuchsiaVolumeManager: { |
| const uint8_t fvm_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| memcpy(type, fvm_type, GPT_GUID_LEN); |
| minimum_size_bytes = 8LU * (1 << 30); |
| name = kFvmPartitionName; |
| break; |
| } |
| default: |
| ERROR("Cros partitioner cannot add unknown partition type\n"); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| return gpt_->AddPartition(name, type, minimum_size_bytes, |
| optional_reserve_bytes, out_fd); |
| } |
| |
| zx_status_t CrosDevicePartitioner::FindPartition(Partition partition_type, |
| fbl::unique_fd* out_fd) const { |
| switch (partition_type) { |
| case Partition::kKernelC: { |
| const auto filter = [](const gpt_partition_t& part) { |
| return KernelFilterCallback(part, kKerncName); |
| }; |
| return gpt_->FindPartition(filter, out_fd); |
| } |
| case Partition::kFuchsiaVolumeManager: |
| return gpt_->FindPartition(FvmFilterCallback, out_fd); |
| |
| default: |
| ERROR("Cros partitioner cannot find unknown partition type\n"); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| } |
| |
| zx_status_t CrosDevicePartitioner::FinalizePartition(Partition partition_type) { |
| // Special partition finalization is only necessary for Zircon partition. |
| if (partition_type != Partition::kKernelC) { |
| return ZX_OK; |
| } |
| |
| // First, find the priority of the KERN-A and KERN-B partitions. |
| gpt_partition_t* partition; |
| zx_status_t status; |
| const auto filter_kerna = [](const gpt_partition_t& part) { |
| return KernelFilterCallback(part, kKernaName); |
| }; |
| if ((status = gpt_->FindPartition(filter_kerna, &partition, nullptr)) != ZX_OK) { |
| ERROR("Cannot find %s partition\n", kKernaName); |
| return status; |
| } |
| const uint8_t priority_a = gpt_cros_attr_get_priority(partition->flags); |
| |
| const auto filter_kernb = [](const gpt_partition_t& part) { |
| return KernelFilterCallback(part, kKernbName); |
| }; |
| if ((status = gpt_->FindPartition(filter_kernb, &partition, nullptr)) != ZX_OK) { |
| ERROR("Cannot find %s partition\n", kKernbName); |
| return status; |
| } |
| const uint8_t priority_b = gpt_cros_attr_get_priority(partition->flags); |
| |
| const auto filter_kernc = [](const gpt_partition_t& part) { |
| return KernelFilterCallback(part, kKerncName); |
| }; |
| if ((status = gpt_->FindPartition(filter_kernc, &partition, nullptr)) != ZX_OK) { |
| ERROR("Cannot find %s partition\n", kKerncName); |
| return status; |
| } |
| |
| // Priority for Kern C set to higher priority than Kern A and Kern B. |
| uint8_t priority_c = fbl::max(priority_a, priority_b); |
| if (priority_c + 1 <= priority_c) { |
| ERROR("Cannot set CrOS partition priority higher than A and B\n"); |
| return ZX_ERR_OUT_OF_RANGE; |
| } |
| priority_c++; |
| if (priority_c <= gpt_cros_attr_get_priority(partition->flags)) { |
| // No modification required; the priority is already high enough. |
| return ZX_OK; |
| } |
| |
| if (gpt_cros_attr_set_priority(&partition->flags, priority_c) != 0) { |
| ERROR("Cannot set CrOS partition priority for KERN-C\n"); |
| return ZX_ERR_OUT_OF_RANGE; |
| } |
| // Successful set to 'true' to encourage the bootloader to |
| // use this partition. |
| gpt_cros_attr_set_successful(&partition->flags, true); |
| // Maximize the number of attempts to boot this partition before |
| // we fall back to a different kernel. |
| if (gpt_cros_attr_set_tries(&partition->flags, 15) != 0) { |
| ERROR("Cannot set CrOS partition 'tries' for KERN-C\n"); |
| return ZX_ERR_OUT_OF_RANGE; |
| } |
| gpt_device_sync(gpt_->GetGpt()); |
| return ZX_OK; |
| } |
| |
| zx_status_t CrosDevicePartitioner::WipePartitions(const fbl::Vector<Partition>& partitions) { |
| const uint8_t fvm_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| const uint8_t install_type[GPT_GUID_LEN] = GUID_INSTALL_VALUE; |
| const uint8_t system_type[GPT_GUID_LEN] = GUID_SYSTEM_VALUE; |
| const uint8_t blob_type[GPT_GUID_LEN] = GUID_BLOB_VALUE; |
| const uint8_t data_type[GPT_GUID_LEN] = GUID_DATA_VALUE; |
| |
| fbl::Vector<const uint8_t*> partition_list; |
| for (const auto& partition_type : partitions) { |
| switch (partition_type) { |
| case Partition::kEfi: |
| continue; |
| case Partition::kFuchsiaVolumeManager: |
| partition_list.push_back(fvm_type); |
| break; |
| case Partition::kInstallType: |
| partition_list.push_back(install_type); |
| break; |
| case Partition::kSystem: |
| partition_list.push_back(system_type); |
| break; |
| case Partition::kBlob: |
| partition_list.push_back(blob_type); |
| break; |
| case Partition::kData: |
| partition_list.push_back(data_type); |
| break; |
| default: |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| } |
| |
| auto filter = [&](const gpt_partition_t& part) { |
| for (const auto& type : partition_list) { |
| if (memcmp(part.type, type, GPT_GUID_LEN) == 0) { |
| return true; |
| } |
| } |
| return false; |
| }; |
| return gpt_->WipePartitions(filter); |
| } |
| |
| /*====================================================* |
| * FIXED PARTITION MAP * |
| *====================================================*/ |
| |
| zx_status_t FixedDevicePartitioner::Initialize(fbl::unique_ptr<DevicePartitioner>* partitioner) { |
| LOG("Successfully intitialized FixedDevicePartitioner Device Partitioner\n"); |
| *partitioner = fbl::move(WrapUnique(new FixedDevicePartitioner)); |
| return ZX_OK; |
| } |
| |
| zx_status_t FixedDevicePartitioner::FindPartition(Partition partition_type, |
| fbl::unique_fd* out_fd) const { |
| uint8_t type[GPT_GUID_LEN]; |
| |
| switch (partition_type) { |
| case Partition::kZirconA: { |
| const uint8_t zircon_a_type[GPT_GUID_LEN] = GUID_ZIRCON_A_VALUE; |
| memcpy(type, zircon_a_type, GPT_GUID_LEN); |
| break; |
| } |
| case Partition::kZirconB: { |
| const uint8_t zircon_b_type[GPT_GUID_LEN] = GUID_ZIRCON_B_VALUE; |
| memcpy(type, zircon_b_type, GPT_GUID_LEN); |
| break; |
| } |
| case Partition::kZirconR: { |
| const uint8_t zircon_r_type[GPT_GUID_LEN] = GUID_ZIRCON_R_VALUE; |
| memcpy(type, zircon_r_type, GPT_GUID_LEN); |
| break; |
| } |
| case Partition::kFuchsiaVolumeManager: { |
| const uint8_t fvm_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| memcpy(type, fvm_type, GPT_GUID_LEN); |
| break; |
| } |
| default: |
| ERROR("partition_type is invalid!\n"); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| out_fd->reset(open_partition(nullptr, type, ZX_SEC(5), nullptr)); |
| if (!out_fd) { |
| return ZX_ERR_NOT_FOUND; |
| } |
| return ZX_OK; |
| } |
| |
| zx_status_t FixedDevicePartitioner::GetBlockInfo(const fbl::unique_fd& block_fd, |
| block_info_t* block_info) const { |
| ssize_t r; |
| if ((r = ioctl_block_get_info(block_fd.get(), block_info) < 0)) { |
| return ZX_ERR_IO; |
| } |
| return ZX_OK; |
| } |
| |
| /*====================================================* |
| * NAND SPECIFIC * |
| *====================================================*/ |
| |
| zx_status_t NandDevicePartitioner::Initialize(fbl::unique_ptr<DevicePartitioner>* partitioner) { |
| return ZX_ERR_NOT_SUPPORTED; |
| // TODO: Check if this is a NAND part. |
| #if 0 |
| LOG("Successfully intitialized NandDevicePartitioner Device Partitioner\n"); |
| *partitioner = fbl::move(WrapUnique(new NandDevicePartitioner)); |
| #endif |
| } |
| |
| zx_status_t NandDevicePartitioner::FindPartition(Partition partition_type, |
| fbl::unique_fd* out_fd) const { |
| uint8_t type[GPT_GUID_LEN]; |
| |
| switch (partition_type) { |
| case Partition::kZirconA: { |
| const uint8_t zircon_a_type[GPT_GUID_LEN] = GUID_ZIRCON_A_VALUE; |
| memcpy(type, zircon_a_type, GPT_GUID_LEN); |
| break; |
| } |
| case Partition::kZirconB: { |
| const uint8_t zircon_b_type[GPT_GUID_LEN] = GUID_ZIRCON_B_VALUE; |
| memcpy(type, zircon_b_type, GPT_GUID_LEN); |
| break; |
| } |
| case Partition::kZirconR: { |
| const uint8_t zircon_r_type[GPT_GUID_LEN] = GUID_ZIRCON_R_VALUE; |
| memcpy(type, zircon_r_type, GPT_GUID_LEN); |
| break; |
| } |
| case Partition::kFuchsiaVolumeManager: { |
| const uint8_t fvm_type[GPT_GUID_LEN] = GUID_FVM_VALUE; |
| memcpy(type, fvm_type, GPT_GUID_LEN); |
| out_fd->reset(open_partition(nullptr, type, ZX_SEC(5), nullptr)); |
| if (!out_fd) { |
| return ZX_ERR_NOT_FOUND; |
| } |
| return ZX_OK; |
| } |
| default: |
| ERROR("partition_type is invalid!\n"); |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| // TODO: Find skip-block partition. |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| |
| zx_status_t NandDevicePartitioner::GetBlockInfo(const fbl::unique_fd& block_fd, |
| block_info_t* block_info) const { |
| skip_block_partition_info_t info; |
| ssize_t r; |
| if ((r = ioctl_skip_block_get_info(block_fd.get(), block_info) < 0)) { |
| return ZX_ERR_IO; |
| } |
| return ZX_OK; |
| } |
| |
| } // namespace paver |
