NetBSD-5.0.2/sys/compat/irix/irix_swap.c
/* $NetBSD: irix_swap.c,v 1.21 2008/04/28 20:23:42 martin Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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: irix_swap.c,v 1.21 2008/04/28 20:23:42 martin Exp $");
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/swap.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/syscallargs.h>
#include <uvm/uvm_page.h>
#include <uvm/uvm_swap.h>
#include <compat/common/compat_util.h>
#include <compat/irix/irix_types.h>
#include <compat/irix/irix_signal.h>
#include <compat/irix/irix_swap.h>
#include <compat/irix/irix_syscall.h>
#include <compat/irix/irix_syscallargs.h>
int
irix_sys_swapctl(struct lwp *l, const struct irix_sys_swapctl_args *uap, register_t *retval)
{
/* {
syscallarg(int) cmd;
syscallarg(void *) arg;
} */
struct sys_swapctl_args cup;
int error = 0;
#ifdef DEBUG_IRIX
printf("irix_sys_swapctl(): cmd = %d, arg = %p\n", SCARG(uap, cmd),
SCARG(uap, arg));
#endif
switch (SCARG(uap, cmd)) {
case IRIX_SC_ADD: /* Add a swap resource */
case IRIX_SC_SGIADD: /* Add a swap resource */
case IRIX_SC_REMOVE: {/* Remove a swap resource */
struct irix_xswapres isr;
size_t len = (SCARG(uap, cmd) == IRIX_SC_SGIADD) ?
sizeof(struct irix_xswapres) : sizeof(struct irix_swapres);
if ((error = copyin(SCARG(uap, arg), &isr, len)) != 0)
return error;
#ifdef DEBUG_IRIX
printf("irix_sys_swapctl(): sr_start=%d, sr_length=%d",
isr.sr_start, isr.sr_length);
if (SCARG(uap, cmd) == IRIX_SC_SGIADD)
printf(", sr_maxlength=%d, sr_vlength=%d",
isr.sr_maxlength, isr.sr_vlength);
printf("\n");
#endif
if (isr.sr_start != 0) {
printf("Warning: irix_sys_swapctl(): ");
printf("unsupported non null sr_start\n");
return EINVAL;
}
SCARG(&cup, cmd) =
(SCARG(uap, cmd) == IRIX_SC_REMOVE) ? SWAP_OFF : SWAP_ON;
SCARG(&cup, arg) = isr.sr_name;
SCARG(&cup, misc) =
(SCARG(uap, cmd) == IRIX_SC_SGIADD) ? isr.sr_pri : 0;
return sys_swapctl(l, &cup, retval);
break;
}
case IRIX_SC_GETNSWP: /* Get number of swap items */
SCARG(&cup, cmd) = SWAP_NSWAP;
SCARG(&cup, arg) = NULL;
SCARG(&cup, misc) = 0;
return sys_swapctl(l, &cup, retval);
break;
case IRIX_SC_LIST: { /* Get swap list */
struct irix_swaptable ist;
struct swapent *bse;
struct irix_swapent *ise, *uise;
int len, ilen, pathlen;
int i;
size_t blksz = dbtob(1); /* One swap block size in bytes */
int scale = (PAGE_SIZE / blksz);
if ((error = copyin(SCARG(uap, arg), &ist, sizeof(ist))) != 0)
return error;
uise = (struct irix_swapent *)((char *)SCARG(uap, arg) +
sizeof(ist.swt_n));
len = sizeof(struct swapent) * ist.swt_n;
bse = (struct swapent *)malloc(len, M_TEMP, M_WAITOK);
ilen = sizeof(struct irix_swapent) * ist.swt_n;
ise = (struct irix_swapent *)malloc(ilen, M_TEMP, M_WAITOK);
if ((error = copyin(uise, ise, ilen)) != 0)
return error;
uvm_swap_stats(SWAP_STATS, bse, ist.swt_n, retval);
for (i = 0; i < ist.swt_n; i++) {
pathlen = MIN(strlen(bse[i].se_path), IRIX_PATH_MAX);
if (ise[i].ste_path != NULL &&
((error = copyout(&(bse[i].se_path),
ise[i].ste_path, pathlen)) != 0))
goto bad;
ise[i].ste_start = 0;
ise[i].ste_length = bse[i].se_nblks * blksz;
ise[i].ste_pages = bse[i].se_nblks / scale;
ise[i].ste_free = (bse[i].se_nblks - bse[i].se_inuse) /
scale;
ise[i].ste_flags = 0;
if (bse[i].se_flags & SWF_FAKE)
ise[i].ste_flags |= IRIX_ST_NOTREADY;
ise[i].ste_vpages = bse[i].se_inuse / scale;
ise[i].ste_maxpages = bse[i].se_nblks / scale;
ise[i].ste_lswap = 1; /* XXX */
ise[i].ste_pri = bse[i].se_priority;
}
error = copyout(ise, uise, ilen);
bad:
free(bse, M_TEMP);
free(ise, M_TEMP);
return error;
break;
}
case IRIX_SC_GETFREESWAP:
case IRIX_SC_GETSWAPVIRT: {
int entries;
struct swapent *sep;
int i, dontcare, sum = 0;
SCARG(&cup, cmd) = SWAP_NSWAP;
SCARG(&cup, arg) = NULL;
SCARG(&cup, misc) = 0;
if ((error = sys_swapctl(l, &cup,
(register_t *)(void *)&entries)) != 0)
return error;
sep = (struct swapent *)malloc(
sizeof(struct swapent) * entries, M_TEMP, M_WAITOK);
uvm_swap_stats(SWAP_STATS, sep, entries,
(register_t *)(void *)&dontcare);
if (SCARG(uap, cmd) == IRIX_SC_GETFREESWAP)
for (i = 0; i < entries; i++)
sum += (sep[i].se_nblks - sep[i].se_inuse);
if (SCARG(uap, cmd) == IRIX_SC_GETSWAPVIRT)
for (i = 0; i < entries; i++)
sum += sep[i].se_nblks;
/* dbtob(1) is the size in byte of one swap block */
sum = sum * IRIX_SWAP_BLKSZ / dbtob(1);
if ((error = copyout(&sum, SCARG(uap, arg), sizeof(sum))) != 0)
return error;
break;
}
default:
printf("irix_sys_swapctl(): unsupported command %d\n",
SCARG(uap, cmd));
return EINVAL;
break;
}
return 0;
}