class Transaction
Defined at line 51 of file ../../src/storage/minfs/writeback.h
Tracks the current transaction, including any enqueued writes, and reserved blocks
and inodes. Also handles allocation of previously reserved blocks/inodes.
Upon construction, acquires a lock to ensure that all work being done within the
scope of the transaction is thread-safe. Specifically, the Minfs superblock, block bitmap, and
inode table, as well as the Vnode block count and inode size may in the near future be modified
asynchronously. Since these modifications require a Transaction to be in progress, this lock
will protect against multiple simultaneous writes to these structures.
Public Methods
zx::result<std::unique_ptr<Transaction>> Create (TransactionalFs * minfs, size_t reserve_inodes, size_t reserve_blocks, InodeManager * inode_manager)Defined at line 36 of file ../../src/storage/minfs/writeback.cc
void Transaction ()Defined at line 62 of file ../../src/storage/minfs/writeback.h
std::unique_ptr<Transaction> FromCachedBlockTransaction (TransactionalFs * minfs, std::unique_ptr<CachedBlockTransaction> cached_transaction)Creates a Transaction object from CachedBlockTransaction. Consumes cached_transaction.
Defined at line 64 of file ../../src/storage/minfs/writeback.cc
AllocatorReservation & inode_reservation ()Defined at line 69 of file ../../src/storage/minfs/writeback.h
AllocatorReservation & block_reservation ()Defined at line 70 of file ../../src/storage/minfs/writeback.h
void Transaction (TransactionalFs * minfs, std::unique_ptr<CachedBlockTransaction> cached_transaction)Defined at line 70 of file ../../src/storage/minfs/writeback.cc
size_t AllocateBlock ()Defined at line 78 of file ../../src/storage/minfs/writeback.h
void DeallocateBlock (size_t block)Defined at line 80 of file ../../src/storage/minfs/writeback.h
void ~Transaction ()Defined at line 82 of file ../../src/storage/minfs/writeback.cc
size_t AllocateInode ()/////////////
Other methods.
Defined at line 84 of file ../../src/storage/minfs/writeback.h
std::vector<storage::UnbufferedOperation> RemoveMetadataOperations ()Returns a vector of all enqueued metadata write operations.
Defined at line 94 of file ../../src/storage/minfs/writeback.h
std::vector<storage::UnbufferedOperation> RemoveDataOperations ()Returns a vector of all enqueued data write operations.
Defined at line 99 of file ../../src/storage/minfs/writeback.h
size_t SwapBlock (size_t old_bno)Defined at line 103 of file ../../src/storage/minfs/writeback.h
std::unique_ptr<AllocatorReservation> TakeBlockReservations (std::unique_ptr<Transaction> transaction)Returns the block reservations within |transaction| and consumes |transaction|.
Asserts that there are no inode reservations.
Defined at line 109 of file ../../src/storage/minfs/writeback.h
std::vector<storage::BufferedOperation> TakeOperations ()Defined at line 118 of file ../../src/storage/minfs/writeback.h
void EnqueueMetadata (storage::Operation operation, storage::BlockBuffer * buffer)/////////////
PendingWork interface.
Defined at line 118 of file ../../src/storage/minfs/writeback.cc
void EnqueueData (storage::Operation operation, storage::BlockBuffer * buffer)Defined at line 122 of file ../../src/storage/minfs/writeback.cc
void PinVnode (fbl::RefPtr<VnodeMinfs> vnode)No-op - don't need to pin vnodes on host.
NOLINTNEXTLINE(performance-unnecessary-value-param)
Defined at line 128 of file ../../src/storage/minfs/writeback.cc
zx::result<> ExtendBlockReservation (size_t reserve_blocks)Extends block reservation by |reserve_blocks| number of blocks. It may fail
if the underlying allocator runs out of space.
Defined at line 131 of file ../../src/storage/minfs/writeback.cc
std::vector<fbl::RefPtr<VnodeMinfs>> RemovePinnedVnodes ()Defined at line 114 of file ../../src/storage/minfs/writeback.cc