1 /*-
2 * Copyright (c) 2011 Google, Inc.
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 /*
29 * Read from the host filesystem
30 */
31
32 #include <sys/param.h>
33 #include <sys/time.h>
34 #include <stddef.h>
35 #include <stdarg.h>
36 #include <string.h>
37 #include <stand.h>
38 #include <bootstrap.h>
39
40 #include "libuserboot.h"
41
42 /*
43 * Open a file.
44 */
45 static int
host_open(const char * upath,struct open_file * f)46 host_open(const char *upath, struct open_file *f)
47 {
48
49 if (f->f_dev != &host_dev)
50 return (EINVAL);
51
52 return (CALLBACK(open, upath, &f->f_fsdata));
53 }
54
55 static int
host_close(struct open_file * f)56 host_close(struct open_file *f)
57 {
58
59 CALLBACK(close, f->f_fsdata);
60 f->f_fsdata = (void *)0;
61
62 return (0);
63 }
64
65 /*
66 * Copy a portion of a file into memory.
67 */
68 static int
host_read(struct open_file * f,void * start,size_t size,size_t * resid)69 host_read(struct open_file *f, void *start, size_t size, size_t *resid)
70 {
71
72 return (CALLBACK(read, f->f_fsdata, start, size, resid));
73 }
74
75 static off_t
host_seek(struct open_file * f,off_t offset,int where)76 host_seek(struct open_file *f, off_t offset, int where)
77 {
78
79 return (CALLBACK(seek, f->f_fsdata, offset, where));
80 }
81
82 static int
host_stat(struct open_file * f,struct stat * sb)83 host_stat(struct open_file *f, struct stat *sb)
84 {
85
86 CALLBACK(stat, f->f_fsdata, sb);
87 return (0);
88 }
89
90 static int
host_readdir(struct open_file * f,struct dirent * d)91 host_readdir(struct open_file *f, struct dirent *d)
92 {
93 uint32_t fileno;
94 uint8_t type;
95 size_t namelen;
96 int rc;
97
98 rc = CALLBACK(readdir, f->f_fsdata, &fileno, &type, &namelen,
99 d->d_name);
100 if (rc)
101 return (rc);
102
103 d->d_fileno = fileno;
104 d->d_type = type;
105 d->d_namlen = namelen;
106
107 return (0);
108 }
109
110 static int
host_dev_init(void)111 host_dev_init(void)
112 {
113
114 return (0);
115 }
116
117 static int
host_dev_print(int verbose)118 host_dev_print(int verbose)
119 {
120 char line[80];
121
122 printf("%s devices:", host_dev.dv_name);
123 if (pager_output("\n") != 0)
124 return (1);
125
126 snprintf(line, sizeof(line), " host%d: Host filesystem\n", 0);
127 return (pager_output(line));
128 }
129
130 /*
131 * 'Open' the host device.
132 */
133 static int
host_dev_open(struct open_file * f,...)134 host_dev_open(struct open_file *f, ...)
135 {
136
137 return (0);
138 }
139
140 static int
host_dev_close(struct open_file * f)141 host_dev_close(struct open_file *f)
142 {
143
144 return (0);
145 }
146
147 static int
host_dev_strategy(void * devdata,int rw,daddr_t dblk,size_t size,char * buf,size_t * rsize)148 host_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size,
149 char *buf, size_t *rsize)
150 {
151
152 return (ENOSYS);
153 }
154
155 struct fs_ops host_fsops = {
156 .fs_name = "host",
157 .fo_open = host_open,
158 .fo_close = host_close,
159 .fo_read = host_read,
160 .fo_write = null_write,
161 .fo_seek = host_seek,
162 .fo_stat = host_stat,
163 .fo_readdir = host_readdir,
164 };
165
166 struct devsw host_dev = {
167 .dv_name = "host",
168 .dv_type = DEVT_NET,
169 .dv_init = host_dev_init,
170 .dv_strategy = host_dev_strategy,
171 .dv_open = host_dev_open,
172 .dv_close = host_dev_close,
173 .dv_ioctl = noioctl,
174 .dv_print = host_dev_print,
175 .dv_cleanup = nullsys,
176 };
177