2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2013 Peter Grehan <grehan@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * The block API to be used by bhyve block-device emulations. The routines
33 * are thread safe, with no assumptions about the context of the completion
34 * callback - it may occur in the caller's context, or asynchronously in
42 #include <sys/unistd.h>
44 #define BLOCKIF_IOV_MAX 33 /* not practical to be IOV_MAX */
50 void (*br_callback)(struct blockif_req *req, int err);
52 struct iovec br_iov[BLOCKIF_IOV_MAX];
56 struct blockif_ctxt *blockif_open(const char *optstr, const char *ident);
57 off_t blockif_size(struct blockif_ctxt *bc);
58 void blockif_chs(struct blockif_ctxt *bc, uint16_t *c, uint8_t *h,
60 int blockif_sectsz(struct blockif_ctxt *bc);
61 void blockif_psectsz(struct blockif_ctxt *bc, int *size, int *off);
62 int blockif_queuesz(struct blockif_ctxt *bc);
63 int blockif_is_ro(struct blockif_ctxt *bc);
64 int blockif_candelete(struct blockif_ctxt *bc);
65 int blockif_read(struct blockif_ctxt *bc, struct blockif_req *breq);
66 int blockif_write(struct blockif_ctxt *bc, struct blockif_req *breq);
67 int blockif_flush(struct blockif_ctxt *bc, struct blockif_req *breq);
68 int blockif_delete(struct blockif_ctxt *bc, struct blockif_req *breq);
69 int blockif_cancel(struct blockif_ctxt *bc, struct blockif_req *breq);
70 int blockif_close(struct blockif_ctxt *bc);
72 #endif /* _BLOCK_IF_H_ */