| // 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 <stdlib.h> |
| |
| #include <memory> |
| |
| #include "src/storage/minfs/allocator/inode_manager.h" |
| #include "src/storage/minfs/format.h" |
| |
| namespace minfs { |
| |
| InodeManager::InodeManager(Bcache* bc, blk_t start_block, uint32_t block_size) |
| : start_block_(start_block), block_size_(block_size), bc_(bc) {} |
| |
| zx_status_t InodeManager::Create(Bcache* bc, SuperblockManager* sb, |
| fs::BufferedOperationsBuilder* builder, AllocatorMetadata metadata, |
| blk_t start_block, size_t inodes, |
| std::unique_ptr<InodeManager>* out) { |
| auto mgr = std::unique_ptr<InodeManager>(new InodeManager(bc, start_block, sb->BlockSize())); |
| InodeManager* mgr_raw = mgr.get(); |
| |
| auto grow_cb = [mgr_raw](uint32_t pool_size) { return mgr_raw->Grow(pool_size); }; |
| |
| zx_status_t status; |
| std::unique_ptr<PersistentStorage> storage(new PersistentStorage( |
| sb, kMinfsInodeSize, std::move(grow_cb), std::move(metadata), sb->BlockSize())); |
| if ((status = Allocator::Create(builder, std::move(storage), &mgr->inode_allocator_)) != ZX_OK) { |
| return status; |
| } |
| |
| *out = std::move(mgr); |
| return ZX_OK; |
| } |
| |
| void InodeManager::Update(PendingWork* transaction, ino_t ino, const Inode* inode) { |
| // Obtain the offset of the inode within its containing block |
| const uint32_t off_of_ino = (ino % kMinfsInodesPerBlock) * kMinfsInodeSize; |
| const blk_t inoblock_rel = ino / kMinfsInodesPerBlock; |
| const blk_t inoblock_abs = inoblock_rel + start_block_; |
| ZX_DEBUG_ASSERT(inoblock_abs < kFVMBlockDataStart); |
| |
| // Since host-side tools don't have "mapped vmos", just read / update / |
| // write the single absolute inode block. |
| uint8_t inodata[BlockSize()]; |
| bc_->Readblk(inoblock_abs, inodata); |
| memcpy(inodata + off_of_ino, inode, kMinfsInodeSize); |
| bc_->Writeblk(inoblock_abs, inodata); |
| } |
| |
| const Allocator* InodeManager::GetInodeAllocator() const { return inode_allocator_.get(); } |
| |
| void InodeManager::Load(ino_t ino, Inode* out) const { |
| // obtain the block of the inode table we need |
| uint32_t off_of_ino = (ino % kMinfsInodesPerBlock) * kMinfsInodeSize; |
| uint8_t inodata[BlockSize()]; |
| bc_->Readblk(start_block_ + (ino / kMinfsInodesPerBlock), inodata); |
| const Inode* inode = |
| reinterpret_cast<const Inode*>(reinterpret_cast<uintptr_t>(inodata) + off_of_ino); |
| memcpy(out, inode, kMinfsInodeSize); |
| } |
| |
| zx_status_t InodeManager::Grow(size_t inodes) { return ZX_ERR_NO_SPACE; } |
| |
| } // namespace minfs |