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NetBSD/sys/compat/linux/common/linux_sg.c

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/* $NetBSD: linux_sg.c,v 1.14 2017/11/21 10:45:12 maxv Exp $ */
/*
* Copyright (c) 2004 Soren S. Jorvang. 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>
__KERNEL_RCSID(0, "$NetBSD: linux_sg.c,v 1.14 2017/11/21 10:45:12 maxv Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/scsiio.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_ioctl.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_sg.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>
int linux_sg_version = 30125;
#ifdef LINUX_SG_DEBUG
#define DPRINTF(a) printf a
#else
#define DPRINTF(a)
#endif
#ifdef LINUX_SG_DEBUG
static void dump_sg_io(struct linux_sg_io_hdr *);
static void dump_scsireq(struct scsireq *);
#endif
static int bsd_to_linux_host_status(int);
static int bsd_to_linux_driver_status(int);
int
linux_ioctl_sg(struct lwp *l, const struct linux_sys_ioctl_args *uap,
register_t *retval)
{
file_t *fp;
u_long com = SCARG(uap, com);
int error = 0;
int (*ioctlf)(file_t *, u_long, void *);
struct linux_sg_io_hdr lreq;
struct scsireq req;
if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
return EBADF;
ioctlf = fp->f_ops->fo_ioctl;
*retval = 0;
DPRINTF(("Command = %lx\n", com));
switch (com) {
case LINUX_SG_GET_VERSION_NUM: {
error = copyout(&linux_sg_version, SCARG(uap, data),
sizeof(linux_sg_version));
break;
}
case LINUX_SG_IO:
error = copyin(SCARG(uap, data), &lreq, sizeof(lreq));
if (error) {
DPRINTF(("failed to copy in request data %d\n", error));
break;
}
#ifdef LINUX_SG_DEBUG
dump_sg_io(&lreq);
#endif
(void)memset(&req, 0, sizeof(req));
switch (lreq.dxfer_direction) {
case SG_DXFER_TO_DEV:
req.flags = SCCMD_WRITE;
break;
case SG_DXFER_FROM_DEV:
req.flags = SCCMD_READ;
break;
default:
DPRINTF(("unknown direction %d\n",
lreq.dxfer_direction));
error = EINVAL;
goto done;
}
if (lreq.iovec_count != 0) {
/* XXX: Not yet */
error = EOPNOTSUPP;
DPRINTF(("scatter/gather not supported\n"));
break;
}
if (lreq.cmd_len > sizeof(req.cmd)) {
DPRINTF(("invalid command length %d\n", lreq.cmd_len));
error = EINVAL;
break;
}
error = copyin(lreq.cmdp, req.cmd, lreq.cmd_len);
if (error) {
DPRINTF(("failed to copy in cmd data %d\n", error));
break;
}
req.timeout = lreq.timeout;
req.cmdlen = lreq.cmd_len;
req.datalen = lreq.dxfer_len;
req.databuf = lreq.dxferp;
error = ioctlf(fp, SCIOCCOMMAND, &req);
if (error) {
DPRINTF(("SCIOCCOMMAND failed %d\n", error));
break;
}
#ifdef LINUX_SG_DEBUG
dump_scsireq(&req);
#endif
if (req.senselen_used) {
if (req.senselen > lreq.mx_sb_len)
req.senselen = lreq.mx_sb_len;
lreq.sb_len_wr = req.senselen;
error = copyout(req.sense, lreq.sbp, req.senselen);
if (error) {
DPRINTF(("sense copyout failed %d\n", error));
break;
}
} else {
lreq.sb_len_wr = 0;
}
lreq.status = req.status;
lreq.masked_status = 0; /* XXX */
lreq.host_status = bsd_to_linux_host_status(req.retsts);
lreq.sb_len_wr = req.datalen_used;
lreq.driver_status = bsd_to_linux_driver_status(req.error);
lreq.resid = req.datalen - req.datalen_used;
lreq.duration = req.timeout; /* XXX */
lreq.info = 0; /* XXX */
error = copyout(&lreq, SCARG(uap, data), sizeof(lreq));
if (error) {
DPRINTF(("failed to copy out req data %d\n", error));
}
break;
case LINUX_SG_EMULATED_HOST:
case LINUX_SG_SET_TRANSFORM:
case LINUX_SG_GET_TRANSFORM:
case LINUX_SG_GET_NUM_WAITING:
case LINUX_SG_SCSI_RESET:
case LINUX_SG_GET_REQUEST_TABLE:
case LINUX_SG_SET_KEEP_ORPHAN:
case LINUX_SG_GET_KEEP_ORPHAN:
case LINUX_SG_GET_ACCESS_COUNT:
case LINUX_SG_SET_FORCE_LOW_DMA:
case LINUX_SG_GET_LOW_DMA:
case LINUX_SG_GET_SG_TABLESIZE:
case LINUX_SG_GET_SCSI_ID:
case LINUX_SG_SET_FORCE_PACK_ID:
case LINUX_SG_GET_PACK_ID:
case LINUX_SG_SET_RESERVED_SIZE:
case LINUX_SG_GET_RESERVED_SIZE:
error = ENODEV;
break;
/* version 2 interfaces */
case LINUX_SG_SET_TIMEOUT:
break;
case LINUX_SG_GET_TIMEOUT:
/* ioctl returns value..., grr. */
*retval = 60;
break;
case LINUX_SG_GET_COMMAND_Q:
case LINUX_SG_SET_COMMAND_Q:
case LINUX_SG_SET_DEBUG:
case LINUX_SG_NEXT_CMD_LEN:
error = ENODEV;
break;
}
done:
fd_putfile(SCARG(uap, fd));
DPRINTF(("Return=%d\n", error));
return error;
}
static int
bsd_to_linux_driver_status(int bs)
{
switch (bs) {
default:
case XS_NOERROR:
return 0;
case XS_SENSE:
case XS_SHORTSENSE:
return LINUX_DRIVER_SENSE;
case XS_RESOURCE_SHORTAGE:
return LINUX_DRIVER_SOFT;
case XS_DRIVER_STUFFUP:
return LINUX_DRIVER_ERROR;
case XS_SELTIMEOUT:
case XS_TIMEOUT:
return LINUX_DRIVER_TIMEOUT;
case XS_BUSY:
return LINUX_DRIVER_BUSY;
case XS_RESET:
return LINUX_SUGGEST_ABORT;
case XS_REQUEUE:
return LINUX_SUGGEST_RETRY;
}
}
static int
bsd_to_linux_host_status(int bs)
{
switch (bs) {
case SCCMD_OK:
case SCCMD_SENSE:
return LINUX_DID_OK;
case SCCMD_TIMEOUT:
return LINUX_DID_TIME_OUT;
case SCCMD_BUSY:
return LINUX_DID_BUS_BUSY;
case SCCMD_UNKNOWN:
default:
return LINUX_DID_ERROR;
}
}
#ifdef LINUX_SG_DEBUG
static void
dump_sg_io(struct linux_sg_io_hdr *lr)
{
printf("linuxreq [interface_id=%x, dxfer_direction=%d, cmd_len=%d, "
"mx_sb_len=%d, iovec_count=%d, dxfer_len=%d, dxferp=%p, "
"cmdp=%p, sbp=%p, timeout=%u, flags=%d, pack_id=%d, "
"usr_ptr=%p, status=%u, masked_status=%u, sb_len_wr=%u, "
"host_status=%u, driver_status=%u, resid=%d, duration=%u, "
"info=%u]\n",
lr->interface_id, lr->dxfer_direction, lr->cmd_len,
lr->mx_sb_len, lr->iovec_count, lr->dxfer_len, lr->dxferp,
lr->cmdp, lr->sbp, lr->timeout, lr->flags, lr->pack_id,
lr->usr_ptr, lr->status, lr->masked_status, lr->sb_len_wr,
lr->host_status, lr->driver_status, lr->resid, lr->duration,
lr->info);
}
static void
dump_scsireq(struct scsireq *br)
{
int i;
printf("bsdreq [flags=%lx, timeout=%lu, cmd=[ ",
br->flags, br->timeout);
for (i = 0; i < sizeof(br->cmd) / sizeof(br->cmd[0]); i++)
printf("%.2u ", br->cmd[i]);
printf("], cmdlen=%u, databuf=%p, datalen=%lu, datalen_used=%lu, "
"sense=[ ",
br->cmdlen, br->databuf, br->datalen, br->datalen_used);
for (i = 0; i < sizeof(br->sense) / sizeof(br->sense[0]); i++)
printf("%.2u ", br->sense[i]);
printf("], senselen=%u, senselen_used=%u, status=%u, retsts=%u, "
"error=%d]\n",
br->senselen, br->senselen_used, br->status, br->retsts, br->error);
}
#endif
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