6 #include "io-factory.h"
18  * The I/O factory object manages access to index storage, which is a contiguous range of blocks on
21  * The factory holds the open device and is responsible for closing it. The factory has methods to
31 	struct io_factory *factory;  member
47 	struct io_factory *factory;  member
57 static void uds_get_io_factory(struct io_factory *factory)  in uds_get_io_factory()  argument
59 	atomic_inc(&factory->ref_count);  in uds_get_io_factory()
65 	struct io_factory *factory;  in uds_make_io_factory()  local
67 	result = vdo_allocate(1, struct io_factory, __func__, &factory);  in uds_make_io_factory()
71 	factory->bdev = bdev;  in uds_make_io_factory()
72 	atomic_set_release(&factory->ref_count, 1);  in uds_make_io_factory()
74 	*factory_ptr = factory;  in uds_make_io_factory()
78 int uds_replace_storage(struct io_factory *factory, struct block_device *bdev)  in uds_replace_storage()  argument
80 	factory->bdev = bdev;  in uds_replace_storage()
84 /* Free an I/O factory once all references have been released. */
85 void uds_put_io_factory(struct io_factory *factory)  in uds_put_io_factory()  argument
87 	if (atomic_add_return(-1, &factory->ref_count) <= 0)  in uds_put_io_factory()
88 		vdo_free(factory);  in uds_put_io_factory()
91 size_t uds_get_writable_size(struct io_factory *factory)  in uds_get_writable_size()  argument
93 	return bdev_nr_bytes(factory->bdev);  in uds_get_writable_size()
97 int uds_make_bufio(struct io_factory *factory, off_t block_offset, size_t block_size,  in uds_make_bufio()  argument
102 	client = dm_bufio_client_create(factory->bdev, block_size, reserved_buffers, 0,  in uds_make_bufio()
131 	uds_put_io_factory(reader->factory);  in uds_free_buffered_reader()
136 int uds_make_buffered_reader(struct io_factory *factory, off_t offset, u64 block_count,  in uds_make_buffered_reader()  argument
143 	result = uds_make_bufio(factory, offset, UDS_BLOCK_SIZE, 1, &client);  in uds_make_buffered_reader()
154 		.factory = factory,  in uds_make_buffered_reader()
164 	uds_get_io_factory(factory);  in uds_make_buffered_reader()
274 int uds_make_buffered_writer(struct io_factory *factory, off_t offset, u64 block_count,  in uds_make_buffered_writer()  argument
281 	result = uds_make_bufio(factory, offset, UDS_BLOCK_SIZE, 1, &client);  in uds_make_buffered_writer()
292 		.factory = factory,  in uds_make_buffered_writer()
302 	uds_get_io_factory(factory);  in uds_make_buffered_writer()
371 	uds_put_io_factory(writer->factory);  in uds_free_buffered_writer()