214 lines
6.3 KiB
C
214 lines
6.3 KiB
C
/* $NetBSD: irix_swap.c,v 1.21 2008/04/28 20:23:42 martin Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: irix_swap.c,v 1.21 2008/04/28 20:23:42 martin Exp $");
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/swap.h>
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#include <sys/vnode.h>
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#include <sys/namei.h>
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#include <sys/syscallargs.h>
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#include <uvm/uvm_page.h>
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#include <uvm/uvm_swap.h>
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#include <compat/common/compat_util.h>
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#include <compat/irix/irix_types.h>
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#include <compat/irix/irix_signal.h>
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#include <compat/irix/irix_swap.h>
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#include <compat/irix/irix_syscall.h>
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#include <compat/irix/irix_syscallargs.h>
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int
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irix_sys_swapctl(struct lwp *l, const struct irix_sys_swapctl_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) cmd;
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syscallarg(void *) arg;
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} */
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struct sys_swapctl_args cup;
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int error = 0;
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#ifdef DEBUG_IRIX
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printf("irix_sys_swapctl(): cmd = %d, arg = %p\n", SCARG(uap, cmd),
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SCARG(uap, arg));
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#endif
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switch (SCARG(uap, cmd)) {
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case IRIX_SC_ADD: /* Add a swap resource */
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case IRIX_SC_SGIADD: /* Add a swap resource */
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case IRIX_SC_REMOVE: {/* Remove a swap resource */
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struct irix_xswapres isr;
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size_t len = (SCARG(uap, cmd) == IRIX_SC_SGIADD) ?
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sizeof(struct irix_xswapres) : sizeof(struct irix_swapres);
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if ((error = copyin(SCARG(uap, arg), &isr, len)) != 0)
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return error;
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#ifdef DEBUG_IRIX
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printf("irix_sys_swapctl(): sr_start=%d, sr_length=%d",
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isr.sr_start, isr.sr_length);
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if (SCARG(uap, cmd) == IRIX_SC_SGIADD)
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printf(", sr_maxlength=%d, sr_vlength=%d",
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isr.sr_maxlength, isr.sr_vlength);
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printf("\n");
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#endif
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if (isr.sr_start != 0) {
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printf("Warning: irix_sys_swapctl(): ");
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printf("unsupported non null sr_start\n");
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return EINVAL;
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}
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SCARG(&cup, cmd) =
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(SCARG(uap, cmd) == IRIX_SC_REMOVE) ? SWAP_OFF : SWAP_ON;
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SCARG(&cup, arg) = isr.sr_name;
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SCARG(&cup, misc) =
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(SCARG(uap, cmd) == IRIX_SC_SGIADD) ? isr.sr_pri : 0;
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return sys_swapctl(l, &cup, retval);
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break;
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}
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case IRIX_SC_GETNSWP: /* Get number of swap items */
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SCARG(&cup, cmd) = SWAP_NSWAP;
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SCARG(&cup, arg) = NULL;
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SCARG(&cup, misc) = 0;
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return sys_swapctl(l, &cup, retval);
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break;
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case IRIX_SC_LIST: { /* Get swap list */
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struct irix_swaptable ist;
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struct swapent *bse;
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struct irix_swapent *ise, *uise;
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int len, ilen, pathlen;
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int i;
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size_t blksz = dbtob(1); /* One swap block size in bytes */
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int scale = (PAGE_SIZE / blksz);
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if ((error = copyin(SCARG(uap, arg), &ist, sizeof(ist))) != 0)
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return error;
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uise = (struct irix_swapent *)((char *)SCARG(uap, arg) +
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sizeof(ist.swt_n));
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len = sizeof(struct swapent) * ist.swt_n;
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bse = (struct swapent *)malloc(len, M_TEMP, M_WAITOK);
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ilen = sizeof(struct irix_swapent) * ist.swt_n;
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ise = (struct irix_swapent *)malloc(ilen, M_TEMP, M_WAITOK);
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if ((error = copyin(uise, ise, ilen)) != 0)
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return error;
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uvm_swap_stats(SWAP_STATS, bse, ist.swt_n, retval);
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for (i = 0; i < ist.swt_n; i++) {
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pathlen = MIN(strlen(bse[i].se_path), IRIX_PATH_MAX);
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if (ise[i].ste_path != NULL &&
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((error = copyout(&(bse[i].se_path),
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ise[i].ste_path, pathlen)) != 0))
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goto bad;
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ise[i].ste_start = 0;
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ise[i].ste_length = bse[i].se_nblks * blksz;
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ise[i].ste_pages = bse[i].se_nblks / scale;
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ise[i].ste_free = (bse[i].se_nblks - bse[i].se_inuse) /
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scale;
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ise[i].ste_flags = 0;
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if (bse[i].se_flags & SWF_FAKE)
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ise[i].ste_flags |= IRIX_ST_NOTREADY;
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ise[i].ste_vpages = bse[i].se_inuse / scale;
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ise[i].ste_maxpages = bse[i].se_nblks / scale;
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ise[i].ste_lswap = 1; /* XXX */
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ise[i].ste_pri = bse[i].se_priority;
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}
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error = copyout(ise, uise, ilen);
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bad:
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free(bse, M_TEMP);
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free(ise, M_TEMP);
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return error;
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break;
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}
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case IRIX_SC_GETFREESWAP:
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case IRIX_SC_GETSWAPVIRT: {
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int entries;
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struct swapent *sep;
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int i, dontcare, sum = 0;
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SCARG(&cup, cmd) = SWAP_NSWAP;
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SCARG(&cup, arg) = NULL;
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SCARG(&cup, misc) = 0;
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if ((error = sys_swapctl(l, &cup,
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(register_t *)(void *)&entries)) != 0)
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return error;
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sep = (struct swapent *)malloc(
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sizeof(struct swapent) * entries, M_TEMP, M_WAITOK);
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uvm_swap_stats(SWAP_STATS, sep, entries,
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(register_t *)(void *)&dontcare);
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if (SCARG(uap, cmd) == IRIX_SC_GETFREESWAP)
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for (i = 0; i < entries; i++)
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sum += (sep[i].se_nblks - sep[i].se_inuse);
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if (SCARG(uap, cmd) == IRIX_SC_GETSWAPVIRT)
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for (i = 0; i < entries; i++)
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sum += sep[i].se_nblks;
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/* dbtob(1) is the size in byte of one swap block */
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sum = sum * IRIX_SWAP_BLKSZ / dbtob(1);
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if ((error = copyout(&sum, SCARG(uap, arg), sizeof(sum))) != 0)
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return error;
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break;
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}
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default:
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printf("irix_sys_swapctl(): unsupported command %d\n",
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SCARG(uap, cmd));
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return EINVAL;
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break;
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}
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return 0;
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}
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