1 /*-
2 * Copyright (c) 2001 Doug Rabson
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/9/sys/boot/ia64/ski/skifs.c 164010 2006-11-05 22:03:04Z marcel $");
29
30 #include <sys/param.h>
31 #include <sys/time.h>
32 #include <stddef.h>
33 #include <stand.h>
34 #include <stdarg.h>
35
36 #include <bootstrap.h>
37 #include "libski.h"
38
39 struct disk_req {
40 unsigned long addr;
41 unsigned len;
42 };
43
44 struct disk_stat {
45 int fd;
46 unsigned count;
47 };
48
49 static int
skifs_open(const char * path,struct open_file * f)50 skifs_open(const char *path, struct open_file *f)
51 {
52 int fd;
53
54 /*
55 * Skip leading '/' so that our pretend filesystem starts in
56 * the current working directory.
57 */
58 while (*path == '/')
59 path++;
60
61 fd = ssc((u_int64_t) path, 1, 0, 0, SSC_OPEN);
62 if (fd > 0) {
63 f->f_fsdata = (void*)(u_int64_t) fd;
64 return 0;
65 }
66 return ENOENT;
67 }
68
69 static int
skifs_close(struct open_file * f)70 skifs_close(struct open_file *f)
71 {
72 ssc((u_int64_t) f->f_fsdata, 0, 0, 0, SSC_CLOSE);
73 return 0;
74 }
75
76 static int
skifs_read(struct open_file * f,void * buf,size_t size,size_t * resid)77 skifs_read(struct open_file *f, void *buf, size_t size, size_t *resid)
78 {
79 struct disk_req req;
80 struct disk_stat stat;
81
82 req.len = size;
83 req.addr = (u_int64_t) buf;
84 ssc((u_int64_t) f->f_fsdata, 1, (u_int64_t) &req, f->f_offset, SSC_READ);
85 stat.fd = (u_int64_t) f->f_fsdata;
86 ssc((u_int64_t)&stat, 0, 0, 0, SSC_WAIT_COMPLETION);
87
88 *resid = size - stat.count;
89 f->f_offset += stat.count;
90 return 0;
91 }
92
93 static off_t
skifs_seek(struct open_file * f,off_t offset,int where)94 skifs_seek(struct open_file *f, off_t offset, int where)
95 {
96 u_int64_t base;
97
98 switch (where) {
99 case SEEK_SET:
100 base = 0;
101 break;
102
103 case SEEK_CUR:
104 base = f->f_offset;
105 break;
106
107 case SEEK_END:
108 printf("can't find end of file in SKI\n");
109 base = f->f_offset;
110 break;
111 }
112
113 f->f_offset = base + offset;
114 return base;
115 }
116
117 static int
skifs_stat(struct open_file * f,struct stat * sb)118 skifs_stat(struct open_file *f, struct stat *sb)
119 {
120 bzero(sb, sizeof(*sb));
121 sb->st_mode = S_IFREG | S_IRUSR;
122 return 0;
123 }
124
125 static int
skifs_readdir(struct open_file * f,struct dirent * d)126 skifs_readdir(struct open_file *f, struct dirent *d)
127 {
128 return ENOENT;
129 }
130
131 struct fs_ops ski_fsops = {
132 "fs",
133 skifs_open,
134 skifs_close,
135 skifs_read,
136 null_write,
137 skifs_seek,
138 skifs_stat,
139 skifs_readdir
140 };
141
142 static int
skifs_dev_init(void)143 skifs_dev_init(void)
144 {
145 return 0;
146 }
147
148 /*
149 * Print information about disks
150 */
151 static void
skifs_dev_print(int verbose)152 skifs_dev_print(int verbose)
153 {
154 }
155
156 /*
157 * Attempt to open the disk described by (dev) for use by (f).
158 *
159 * Note that the philosophy here is "give them exactly what
160 * they ask for". This is necessary because being too "smart"
161 * about what the user might want leads to complications.
162 * (eg. given no slice or partition value, with a disk that is
163 * sliced - are they after the first BSD slice, or the DOS
164 * slice before it?)
165 */
166 static int
skifs_dev_open(struct open_file * f,...)167 skifs_dev_open(struct open_file *f, ...)
168 {
169 return 0;
170 }
171
172 static int
skifs_dev_close(struct open_file * f)173 skifs_dev_close(struct open_file *f)
174 {
175
176 return 0;
177 }
178
179 static int
skifs_dev_strategy(void * devdata,int rw,daddr_t dblk,size_t size,char * buf,size_t * rsize)180 skifs_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size, char *buf, size_t *rsize)
181 {
182 return 0;
183 }
184
185 struct devsw skifs_dev = {
186 "fs",
187 DEVT_DISK,
188 skifs_dev_init,
189 skifs_dev_strategy,
190 skifs_dev_open,
191 skifs_dev_close,
192 noioctl,
193 skifs_dev_print
194 };
195