devopen.c revision 344399 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/stand/common/devopen.c 344399 2019-02-20 23:55:35Z kevans $");
29
30#include <stand.h>
31#include <string.h>
32
33#include "bootstrap.h"
34
35#ifdef LOADER_GELI_SUPPORT
36#include "geliboot.h"
37#endif
38
39int
40devopen(struct open_file *f, const char *fname, const char **file)
41{
42	struct devdesc *dev;
43	int result;
44
45	result = archsw.arch_getdev((void **)&dev, fname, file);
46	if (result)
47		return (result);
48
49	/* point to device-specific data so that device open can use it */
50	f->f_dev = dev->d_dev;
51	f->f_devdata = dev;
52	result = dev->d_dev->dv_open(f, dev);
53	if (result != 0) {
54		f->f_devdata = NULL;
55		free(dev);
56		return (result);
57	}
58
59#ifdef LOADER_GELI_SUPPORT
60	/*
61	 * If f->f_dev is geli-encrypted and we can decrypt it (will prompt for
62	 * pw if needed), this will attach the geli code to the open_file by
63	 * replacing f->f_dev and f_devdata with pointers to a geli_devdesc.
64	 */
65	if (f->f_dev->dv_type == DEVT_DISK) {
66		geli_probe_and_attach(f);
67	}
68#endif
69
70	return (0);
71}
72
73int
74devclose(struct open_file *f)
75{
76
77	if (f->f_devdata != NULL) {
78		free(f->f_devdata);
79	}
80	return (0);
81}
82