2cb90a7b2e
We assume in all the code that a DEVT_DISK uses common/disk.c and/or common/part.c and we can access a struct disk_devdesc. hostdisk.c opens raw devices directly, so has no such structures. Define a kboot-specific DEVT_HOSTDISK and use that instead. In addition, disk_fmtdev assumes it is working with a struct disk_devdesc, so write hostdisk_fmtdev as well. Sponsored by: Netflix
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/*-
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* Copyright (C) 2014 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <stdarg.h>
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#include "host_syscall.h"
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#include "kboot.h"
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static int hostdisk_init(void);
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static int hostdisk_strategy(void *devdata, int flag, daddr_t dblk,
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size_t size, char *buf, size_t *rsize);
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static int hostdisk_open(struct open_file *f, ...);
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static int hostdisk_close(struct open_file *f);
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static int hostdisk_ioctl(struct open_file *f, u_long cmd, void *data);
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static int hostdisk_print(int verbose);
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static char *hostdisk_fmtdev(struct devdesc *vdev);
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struct devsw hostdisk = {
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.dv_name = "/dev",
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.dv_type = DEVT_HOSTDISK,
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.dv_init = hostdisk_init,
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.dv_strategy = hostdisk_strategy,
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.dv_open = hostdisk_open,
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.dv_close = hostdisk_close,
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.dv_ioctl = hostdisk_ioctl,
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.dv_print = hostdisk_print,
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.dv_cleanup = nullsys,
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.dv_fmtdev = hostdisk_fmtdev,
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};
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static int
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hostdisk_init(void)
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{
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return (0);
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}
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static int
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hostdisk_strategy(void *devdata, int flag, daddr_t dblk, size_t size,
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char *buf, size_t *rsize)
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{
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struct devdesc *desc = devdata;
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daddr_t pos;
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int n;
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uint64_t res;
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uint32_t posl, posh;
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pos = dblk * 512;
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posl = pos & 0xffffffff;
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posh = (pos >> 32) & 0xffffffff;
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if (host_llseek(desc->d_unit, posh, posl, &res, 0) < 0) {
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printf("Seek error\n");
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return (EIO);
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}
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n = host_read(desc->d_unit, buf, size);
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if (n < 0)
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return (EIO);
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*rsize = n;
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return (0);
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}
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static int
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hostdisk_open(struct open_file *f, ...)
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{
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struct devdesc *desc;
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va_list vl;
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va_start(vl, f);
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desc = va_arg(vl, struct devdesc *);
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va_end(vl);
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desc->d_unit = host_open(desc->d_opendata, O_RDONLY, 0);
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if (desc->d_unit <= 0) {
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printf("hostdisk_open: couldn't open %s: %d\n",
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(char *)desc->d_opendata, desc->d_unit);
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return (ENOENT);
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}
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return (0);
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}
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static int
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hostdisk_close(struct open_file *f)
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{
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struct devdesc *desc = f->f_devdata;
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host_close(desc->d_unit);
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return (0);
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}
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static int
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hostdisk_ioctl(struct open_file *f, u_long cmd, void *data)
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{
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return (EINVAL);
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}
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static int
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hostdisk_print(int verbose)
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{
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char line[80];
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printf("%s devices:", hostdisk.dv_name);
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if (pager_output("\n") != 0)
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return (1);
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snprintf(line, sizeof(line), " /dev%d: Host disk\n", 0);
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return (pager_output(line));
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}
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static char *
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hostdisk_fmtdev(struct devdesc *vdev)
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{
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return (vdev->d_opendata);
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}
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