1256052Sgrehan/*- 2256052Sgrehan * Copyright (c) 2013 Peter Grehan <grehan@freebsd.org> 3256052Sgrehan * All rights reserved. 4256052Sgrehan * 5256052Sgrehan * Redistribution and use in source and binary forms, with or without 6256052Sgrehan * modification, are permitted provided that the following conditions 7256052Sgrehan * are met: 8256052Sgrehan * 1. Redistributions of source code must retain the above copyright 9256052Sgrehan * notice, this list of conditions and the following disclaimer. 10256052Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11256052Sgrehan * notice, this list of conditions and the following disclaimer in the 12256052Sgrehan * documentation and/or other materials provided with the distribution. 13256052Sgrehan * 14256052Sgrehan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 15256052Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16256052Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17256052Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18256052Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19256052Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20256052Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21256052Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22256052Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23256052Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24256052Sgrehan * SUCH DAMAGE. 25256052Sgrehan * 26256052Sgrehan * $FreeBSD$ 27256052Sgrehan */ 28256052Sgrehan 29256052Sgrehan/* 30256052Sgrehan * The block API to be used by bhyve block-device emulations. The routines 31256052Sgrehan * are thread safe, with no assumptions about the context of the completion 32256052Sgrehan * callback - it may occur in the caller's context, or asynchronously in 33256052Sgrehan * another thread. 34256052Sgrehan */ 35256052Sgrehan 36256052Sgrehan#ifndef _BLOCK_IF_H_ 37256052Sgrehan#define _BLOCK_IF_H_ 38256052Sgrehan 39256052Sgrehan#include <sys/uio.h> 40256052Sgrehan#include <sys/unistd.h> 41256052Sgrehan 42256052Sgrehan#define BLOCKIF_IOV_MAX 32 /* not practical to be IOV_MAX */ 43256052Sgrehan 44256052Sgrehanstruct blockif_req { 45256052Sgrehan struct iovec br_iov[BLOCKIF_IOV_MAX]; 46256052Sgrehan int br_iovcnt; 47256052Sgrehan off_t br_offset; 48256052Sgrehan void (*br_callback)(struct blockif_req *req, int err); 49256052Sgrehan void *br_param; 50256052Sgrehan}; 51256052Sgrehan 52256052Sgrehanstruct blockif_ctxt; 53256052Sgrehanstruct blockif_ctxt *blockif_open(const char *optstr, const char *ident); 54256052Sgrehanoff_t blockif_size(struct blockif_ctxt *bc); 55256052Sgrehanint blockif_sectsz(struct blockif_ctxt *bc); 56256052Sgrehanint blockif_queuesz(struct blockif_ctxt *bc); 57256052Sgrehanint blockif_is_ro(struct blockif_ctxt *bc); 58256052Sgrehanint blockif_read(struct blockif_ctxt *bc, struct blockif_req *breq); 59256052Sgrehanint blockif_write(struct blockif_ctxt *bc, struct blockif_req *breq); 60256052Sgrehanint blockif_flush(struct blockif_ctxt *bc, struct blockif_req *breq); 61256052Sgrehanint blockif_cancel(struct blockif_ctxt *bc, struct blockif_req *breq); 62256052Sgrehanint blockif_close(struct blockif_ctxt *bc); 63256052Sgrehan 64256052Sgrehan#endif /* _BLOCK_IF_H_ */ 65