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