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/*-
* 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
};
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