194 lines
4.0 KiB
C
194 lines
4.0 KiB
C
/*-
|
|
* Copyright (c) 2001 Doug Rabson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <stddef.h>
|
|
#include <stand.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "libski.h"
|
|
|
|
struct disk_req {
|
|
unsigned long addr;
|
|
unsigned len;
|
|
};
|
|
|
|
struct disk_stat {
|
|
int fd;
|
|
unsigned count;
|
|
};
|
|
|
|
static int
|
|
skifs_open(const char *path, struct open_file *f)
|
|
{
|
|
int fd;
|
|
|
|
/*
|
|
* Skip leading '/' so that our pretend filesystem starts in
|
|
* the current working directory.
|
|
*/
|
|
while (*path == '/')
|
|
path++;
|
|
|
|
fd = ssc((u_int64_t) path, 1, 0, 0, SSC_OPEN);
|
|
if (fd > 0) {
|
|
f->f_fsdata = (void*)(u_int64_t) fd;
|
|
return 0;
|
|
}
|
|
return ENOENT;
|
|
}
|
|
|
|
static int
|
|
skifs_close(struct open_file *f)
|
|
{
|
|
ssc((u_int64_t) f->f_fsdata, 0, 0, 0, SSC_CLOSE);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
skifs_read(struct open_file *f, void *buf, size_t size, size_t *resid)
|
|
{
|
|
struct disk_req req;
|
|
struct disk_stat stat;
|
|
|
|
req.len = size;
|
|
req.addr = (u_int64_t) buf;
|
|
ssc((u_int64_t) f->f_fsdata, 1, (u_int64_t) &req, f->f_offset, SSC_READ);
|
|
stat.fd = (u_int64_t) f->f_fsdata;
|
|
ssc((u_int64_t)&stat, 0, 0, 0, SSC_WAIT_COMPLETION);
|
|
|
|
*resid = size - stat.count;
|
|
f->f_offset += stat.count;
|
|
return 0;
|
|
}
|
|
|
|
static off_t
|
|
skifs_seek(struct open_file *f, off_t offset, int where)
|
|
{
|
|
u_int64_t base;
|
|
|
|
switch (where) {
|
|
case SEEK_SET:
|
|
base = 0;
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
base = f->f_offset;
|
|
break;
|
|
|
|
case SEEK_END:
|
|
printf("can't find end of file in SKI\n");
|
|
base = f->f_offset;
|
|
break;
|
|
}
|
|
|
|
f->f_offset = base + offset;
|
|
return base;
|
|
}
|
|
|
|
static int
|
|
skifs_stat(struct open_file *f, struct stat *sb)
|
|
{
|
|
bzero(sb, sizeof(*sb));
|
|
sb->st_mode = S_IFREG | S_IRUSR;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
skifs_readdir(struct open_file *f, struct dirent *d)
|
|
{
|
|
return ENOENT;
|
|
}
|
|
|
|
struct fs_ops ski_fsops = {
|
|
"fs",
|
|
skifs_open,
|
|
skifs_close,
|
|
skifs_read,
|
|
null_write,
|
|
skifs_seek,
|
|
skifs_stat,
|
|
skifs_readdir
|
|
};
|
|
|
|
static int
|
|
skifs_dev_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Print information about disks
|
|
*/
|
|
static void
|
|
skifs_dev_print(int verbose)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Attempt to open the disk described by (dev) for use by (f).
|
|
*
|
|
* Note that the philosophy here is "give them exactly what
|
|
* they ask for". This is necessary because being too "smart"
|
|
* about what the user might want leads to complications.
|
|
* (eg. given no slice or partition value, with a disk that is
|
|
* sliced - are they after the first BSD slice, or the DOS
|
|
* slice before it?)
|
|
*/
|
|
static int
|
|
skifs_dev_open(struct open_file *f, ...)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
skifs_dev_close(struct open_file *f)
|
|
{
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
skifs_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size, char *buf, size_t *rsize)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct devsw skifs_dev = {
|
|
"fs",
|
|
DEVT_DISK,
|
|
skifs_dev_init,
|
|
skifs_dev_strategy,
|
|
skifs_dev_open,
|
|
skifs_dev_close,
|
|
noioctl,
|
|
skifs_dev_print
|
|
};
|