229 lines
6.8 KiB
C
229 lines
6.8 KiB
C
/* $NetBSD: dklist.c,v 1.9 2009/04/17 04:03:39 lukem Exp $ */
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/*-
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* Copyright (c) 2001 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 Andrew Doran.
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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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/*
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* Copyright (c) 1996 John M. Vinopal
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project
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* by John M. Vinopal.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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 THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: dklist.c,v 1.9 2009/04/17 04:03:39 lukem Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/disk.h>
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#include <sys/ioctl.h>
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#include <dev/ic/mlxreg.h>
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#include <dev/ic/mlxio.h>
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#include <err.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <nlist.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include "extern.h"
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static SIMPLEQ_HEAD(, mlx_disk) mlx_disks;
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static struct nlist namelist[] = {
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#define X_DISK_COUNT 0
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{ "_iostat_count", 0, 0, 0, 0 }, /* number of disks */
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#define X_DISKLIST 1
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{ "_iostatlist", 0, 0, 0, 0 }, /* TAILQ of disks */
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{ NULL, 0, 0, 0, 0 },
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};
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#define KVM_ERROR(_string) { \
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warnx("%s", (_string)); \
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errx(1, "%s", kvm_geterr(kd)); \
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}
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/*
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* Dereference the namelist pointer `v' and fill in the local copy
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* 'p' which is of size 's'.
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*/
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#define deref_nl(kd, v, p, s) \
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deref_kptr(kd, (void *)namelist[(v)].n_value, (p), (s));
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static void deref_kptr(kvm_t *, void *, void *, size_t);
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void
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mlx_disk_init(void)
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{
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SIMPLEQ_INIT(&mlx_disks);
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}
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int
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mlx_disk_empty(void)
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{
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return (SIMPLEQ_EMPTY(&mlx_disks));
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}
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void
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mlx_disk_iterate(void (*func)(struct mlx_disk *))
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{
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struct mlx_disk *md;
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SIMPLEQ_FOREACH(md, &mlx_disks, chain)
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(*func)(md);
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}
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static int
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mlx_disk_add0(const char *name)
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{
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struct mlx_disk *md;
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int unit;
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if (name[0] != 'l' || name[1] != 'd' || !isdigit((unsigned char)name[2]))
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return (-1);
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SIMPLEQ_FOREACH(md, &mlx_disks, chain)
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if (strcmp(md->name, name) == 0)
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return (0);
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unit = atoi(name + 2);
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if (ioctl(mlxfd, MLX_GET_SYSDRIVE, &unit) < 0)
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return (-1);
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if ((md = malloc(sizeof(*md))) == NULL)
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err(EXIT_FAILURE, "mlx_disk_add()");
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strlcpy(md->name, name, sizeof(md->name));
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md->hwunit = unit;
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SIMPLEQ_INSERT_TAIL(&mlx_disks, md, chain);
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return (0);
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}
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void
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mlx_disk_add(const char *name)
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{
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if (mlx_disk_add0(name) != 0)
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errx(EXIT_FAILURE, "%s is not attached to %s", name, mlxname);
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}
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void
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mlx_disk_add_all(void)
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{
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struct iostatlist_head iostat_head;
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struct io_stats cur_drive, *drv;
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char errbuf[_POSIX2_LINE_MAX];
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char buf[12];
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int i, ndrives;
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kvm_t *kd;
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/* Open the kernel. */
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if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
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errx(1, "kvm_openfiles: %s", errbuf);
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/* Obtain the namelist symbols from the kernel. */
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if (kvm_nlist(kd, namelist))
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KVM_ERROR("kvm_nlist failed to read symbols.");
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/* Get the number of attached drives. */
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deref_nl(kd, X_DISK_COUNT, &ndrives, sizeof(ndrives));
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if (ndrives < 0)
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errx(EXIT_FAILURE, "invalid _disk_count %d.", ndrives);
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if (ndrives == 0)
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errx(EXIT_FAILURE, "no drives attached.");
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/* Get a pointer to the first disk. */
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deref_nl(kd, X_DISKLIST, &iostat_head, sizeof(iostat_head));
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drv = TAILQ_FIRST(&iostat_head);
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/* Try to add each disk to the list. */
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for (i = 0; i < ndrives; i++) {
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deref_kptr(kd, drv, &cur_drive, sizeof(cur_drive));
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deref_kptr(kd, cur_drive.io_name, buf, sizeof(buf));
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if (cur_drive.io_type == IOSTAT_DISK)
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mlx_disk_add0(buf);
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drv = TAILQ_NEXT(&cur_drive, io_link);
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}
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kvm_close(kd);
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}
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/*
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* Dereference the kernel pointer `kptr' and fill in the local copy pointed
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* to by `ptr'. The storage space must be pre-allocated, and the size of
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* the copy passed in `len'.
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*/
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static void
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deref_kptr(kvm_t *kd, void *kptr, void *ptr, size_t len)
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{
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char buf[128];
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if ((size_t)kvm_read(kd, (u_long)kptr, (char *)ptr, len) != len) {
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memset(buf, 0, sizeof(buf));
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snprintf(buf, sizeof buf, "can't dereference kptr 0x%lx",
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(u_long)kptr);
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KVM_ERROR(buf);
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}
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}
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