From 6d03a247468059b0e59c821ef39e6762d4d6fc30 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 19 Jun 2024 23:00:51 +0200 Subject: Merging upstream version 6.9.2. Signed-off-by: Daniel Baumann --- drivers/md/dm-vdo/indexer/io-factory.h | 64 ++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 drivers/md/dm-vdo/indexer/io-factory.h (limited to 'drivers/md/dm-vdo/indexer/io-factory.h') diff --git a/drivers/md/dm-vdo/indexer/io-factory.h b/drivers/md/dm-vdo/indexer/io-factory.h new file mode 100644 index 0000000000..7fb5a0616a --- /dev/null +++ b/drivers/md/dm-vdo/indexer/io-factory.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright 2023 Red Hat + */ + +#ifndef UDS_IO_FACTORY_H +#define UDS_IO_FACTORY_H + +#include + +/* + * The I/O factory manages all low-level I/O operations to the underlying storage device. Its main + * clients are the index layout and the volume. The buffered reader and buffered writer interfaces + * are helpers for accessing data in a contiguous range of storage blocks. + */ + +struct buffered_reader; +struct buffered_writer; + +struct io_factory; + +enum { + UDS_BLOCK_SIZE = 4096, + SECTORS_PER_BLOCK = UDS_BLOCK_SIZE >> SECTOR_SHIFT, +}; + +int __must_check uds_make_io_factory(struct block_device *bdev, + struct io_factory **factory_ptr); + +int __must_check uds_replace_storage(struct io_factory *factory, + struct block_device *bdev); + +void uds_put_io_factory(struct io_factory *factory); + +size_t __must_check uds_get_writable_size(struct io_factory *factory); + +int __must_check uds_make_bufio(struct io_factory *factory, off_t block_offset, + size_t block_size, unsigned int reserved_buffers, + struct dm_bufio_client **client_ptr); + +int __must_check uds_make_buffered_reader(struct io_factory *factory, off_t offset, + u64 block_count, + struct buffered_reader **reader_ptr); + +void uds_free_buffered_reader(struct buffered_reader *reader); + +int __must_check uds_read_from_buffered_reader(struct buffered_reader *reader, u8 *data, + size_t length); + +int __must_check uds_verify_buffered_data(struct buffered_reader *reader, const u8 *value, + size_t length); + +int __must_check uds_make_buffered_writer(struct io_factory *factory, off_t offset, + u64 block_count, + struct buffered_writer **writer_ptr); + +void uds_free_buffered_writer(struct buffered_writer *buffer); + +int __must_check uds_write_to_buffered_writer(struct buffered_writer *writer, + const u8 *data, size_t length); + +int __must_check uds_flush_buffered_writer(struct buffered_writer *writer); + +#endif /* UDS_IO_FACTORY_H */ -- cgit v1.2.3