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