1 /* $NetBSD: devopen.c,v 1.3 2014/01/05 21:09:33 jakllsch Exp $ */
2
3 /*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tohru Nishimura.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/param.h>
33
34 #include <netinet/in.h>
35
36 #include <lib/libsa/stand.h>
37 #include <lib/libsa/nfs.h>
38 #include <lib/libsa/ufs.h>
39 #include <lib/libsa/tftp.h>
40 #include <lib/libkern/libkern.h>
41
42 #include "globals.h"
43 #include "memfs.h"
44
45 struct devsw devnet = { "net", net_strategy, net_open, net_close, noioctl };
46 struct devsw devdsk = { "dsk", dsk_strategy, dsk_open, dsk_close, noioctl };
47
48 struct fs_ops file_system[1] = { FS_OPS(null) };
49 int nfsys = 1;
50 struct fs_ops fs_nfs = FS_OPS(nfs);
51 struct fs_ops fs_tftp = FS_OPS(tftp);
52 struct fs_ops fs_ffsv2 = FS_OPS(ffsv2);
53 struct fs_ops fs_ffsv1 = FS_OPS(ffsv1);
54 struct fs_ops fs_mem = FS_OPS(mem);
55
56 static void parseunit(const char *, int *, int *, char **);
57
58 int
devopen(struct open_file * of,const char * name,char ** file)59 devopen(struct open_file *of, const char *name, char **file)
60 {
61 int error;
62 int unit, part;
63 extern char bootfile[]; /* handed by DHCP */
64
65 if (of->f_flags != F_READ)
66 return EPERM;
67
68 if (strncmp("mem:", name, 4) == 0) {
69 of->f_dev = NULL;
70 of->f_flags |= F_NODEV;
71 file_system[0] = fs_mem;
72 *file = (char *)&name[4];
73 return 0; /* MEM */
74 }
75 if (strncmp("net:", name, 4) == 0 || strncmp("nfs:", name, 4) == 0) {
76 of->f_dev = &devnet;
77 if ((error = net_open(of, &name[4], "nfs")) != 0)
78 return error;
79 file_system[0] = fs_nfs;
80 *file = bootfile; /* resolved fname */
81 return 0; /* NFS */
82 }
83 if (strncmp("tftp:", name, 5) == 0) {
84 of->f_dev = &devnet;
85 if ((error = net_open(of, &name[5], "tftp")) != 0)
86 return error;
87 file_system[0] = fs_tftp;
88 *file = bootfile; /* resolved fname */
89 return 0; /* TFTP */
90 }
91 if (name[0] == 'w' && name[1] == 'd') {
92 parseunit(&name[2], &unit, &part, file);
93 of->f_dev = &devdsk;
94 if (*file == NULL || **file <= ' ')
95 *file = "netbsd";
96 if ((error = dsk_open(of, unit, part, *file)) != 0)
97 return error;
98 file_system[0] = *dsk_fsops(of);
99 return 0; /* FFS */
100 }
101 return ENOENT;
102 }
103
104 static void
parseunit(const char * name,int * unitp,int * partp,char ** pathp)105 parseunit(const char *name, int *unitp, int *partp, char **pathp)
106 {
107 const char *p = name;
108 int unit, part;
109
110 unit = part = -1;
111 while (*p != ':' && *p != '\0') {
112 if (unit == -1 && *p >= '0' && *p <= '9')
113 unit = *p - '0';
114 if (part == -1 && *p >= 'a' && *p < 'a' + 16)
115 part = *p - 'a';
116 p += 1;
117 }
118 *unitp = (unit == -1) ? 0 : unit;
119 *partp = (part == -1) ? 0 : part;
120 *pathp = (*p == ':') ? (char *)p + 1 : NULL;
121 }
122
123 /* ARGSUSED */
124 int
noioctl(struct open_file * f,u_long cmd,void * data)125 noioctl(struct open_file *f, u_long cmd, void *data)
126 {
127
128 return EINVAL;
129 }
130