65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 2013 Peter Grehan <grehan@freebsd.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* The block API to be used by bhyve block-device emulations. The routines
|
|
* are thread safe, with no assumptions about the context of the completion
|
|
* callback - it may occur in the caller's context, or asynchronously in
|
|
* another thread.
|
|
*/
|
|
|
|
#ifndef _BLOCK_IF_H_
|
|
#define _BLOCK_IF_H_
|
|
|
|
#include <sys/uio.h>
|
|
#include <sys/unistd.h>
|
|
|
|
#define BLOCKIF_IOV_MAX 32 /* not practical to be IOV_MAX */
|
|
|
|
struct blockif_req {
|
|
struct iovec br_iov[BLOCKIF_IOV_MAX];
|
|
int br_iovcnt;
|
|
off_t br_offset;
|
|
void (*br_callback)(struct blockif_req *req, int err);
|
|
void *br_param;
|
|
};
|
|
|
|
struct blockif_ctxt;
|
|
struct blockif_ctxt *blockif_open(const char *optstr, const char *ident);
|
|
off_t blockif_size(struct blockif_ctxt *bc);
|
|
int blockif_sectsz(struct blockif_ctxt *bc);
|
|
int blockif_queuesz(struct blockif_ctxt *bc);
|
|
int blockif_is_ro(struct blockif_ctxt *bc);
|
|
int blockif_read(struct blockif_ctxt *bc, struct blockif_req *breq);
|
|
int blockif_write(struct blockif_ctxt *bc, struct blockif_req *breq);
|
|
int blockif_flush(struct blockif_ctxt *bc, struct blockif_req *breq);
|
|
int blockif_cancel(struct blockif_ctxt *bc, struct blockif_req *breq);
|
|
int blockif_close(struct blockif_ctxt *bc);
|
|
|
|
#endif /* _BLOCK_IF_H_ */
|