351 lines
8.9 KiB
C
351 lines
8.9 KiB
C
/*
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* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/sysctl.h>
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#include <sys/kstat.h>
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static MALLOC_DEFINE(M_KSTAT, "kstat_data", "Kernel statistics");
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SYSCTL_ROOT_NODE(OID_AUTO, kstat, CTLFLAG_RW, 0, "Kernel statistics");
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void
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__kstat_set_raw_ops(kstat_t *ksp,
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int (*headers)(char *buf, size_t size),
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int (*data)(char *buf, size_t size, void *data),
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void *(*addr)(kstat_t *ksp, loff_t index))
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{
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ksp->ks_raw_ops.headers = headers;
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ksp->ks_raw_ops.data = data;
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ksp->ks_raw_ops.addr = addr;
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}
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static int
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kstat_default_update(kstat_t *ksp, int rw)
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{
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ASSERT(ksp != NULL);
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if (rw == KSTAT_WRITE)
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return (EACCES);
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return (0);
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}
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kstat_t *
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__kstat_create(const char *module, int instance, const char *name,
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const char *class, uchar_t ks_type, uint_t ks_ndata, uchar_t flags)
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{
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struct sysctl_oid *root;
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kstat_t *ksp;
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KASSERT(instance == 0, ("instance=%d", instance));
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if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO))
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ASSERT(ks_ndata == 1);
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/*
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* Allocate the main structure. We don't need to copy module/class/name
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* stuff in here, because it is only used for sysctl node creation
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* done in this function.
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*/
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ksp = malloc(sizeof (*ksp), M_KSTAT, M_WAITOK|M_ZERO);
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ksp->ks_crtime = gethrtime();
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ksp->ks_snaptime = ksp->ks_crtime;
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ksp->ks_instance = instance;
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strncpy(ksp->ks_name, name, KSTAT_STRLEN);
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strncpy(ksp->ks_class, class, KSTAT_STRLEN);
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ksp->ks_type = ks_type;
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ksp->ks_flags = flags;
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ksp->ks_update = kstat_default_update;
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switch (ksp->ks_type) {
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case KSTAT_TYPE_RAW:
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ksp->ks_ndata = 1;
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ksp->ks_data_size = ks_ndata;
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break;
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case KSTAT_TYPE_NAMED:
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ksp->ks_ndata = ks_ndata;
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ksp->ks_data_size = ks_ndata * sizeof (kstat_named_t);
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break;
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case KSTAT_TYPE_INTR:
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ksp->ks_ndata = ks_ndata;
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ksp->ks_data_size = ks_ndata * sizeof (kstat_intr_t);
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break;
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case KSTAT_TYPE_IO:
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ksp->ks_ndata = ks_ndata;
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ksp->ks_data_size = ks_ndata * sizeof (kstat_io_t);
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break;
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case KSTAT_TYPE_TIMER:
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ksp->ks_ndata = ks_ndata;
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ksp->ks_data_size = ks_ndata * sizeof (kstat_timer_t);
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break;
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default:
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panic("Undefined kstat type %d\n", ksp->ks_type);
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}
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if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) {
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ksp->ks_data = NULL;
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} else {
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ksp->ks_data = kmem_zalloc(ksp->ks_data_size, KM_SLEEP);
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if (ksp->ks_data == NULL) {
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kmem_free(ksp, sizeof (*ksp));
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ksp = NULL;
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}
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}
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/*
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* Create sysctl tree for those statistics:
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*
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* kstat.<module>.<class>.<name>.
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*/
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sysctl_ctx_init(&ksp->ks_sysctl_ctx);
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root = SYSCTL_ADD_NODE(&ksp->ks_sysctl_ctx,
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SYSCTL_STATIC_CHILDREN(_kstat), OID_AUTO, module, CTLFLAG_RW, 0,
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"");
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if (root == NULL) {
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printf("%s: Cannot create kstat.%s tree!\n", __func__, module);
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sysctl_ctx_free(&ksp->ks_sysctl_ctx);
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free(ksp, M_KSTAT);
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return (NULL);
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}
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root = SYSCTL_ADD_NODE(&ksp->ks_sysctl_ctx, SYSCTL_CHILDREN(root),
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OID_AUTO, class, CTLFLAG_RW, 0, "");
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if (root == NULL) {
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printf("%s: Cannot create kstat.%s.%s tree!\n", __func__,
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module, class);
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sysctl_ctx_free(&ksp->ks_sysctl_ctx);
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free(ksp, M_KSTAT);
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return (NULL);
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}
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root = SYSCTL_ADD_NODE(&ksp->ks_sysctl_ctx, SYSCTL_CHILDREN(root),
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OID_AUTO, name, CTLFLAG_RW, 0, "");
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if (root == NULL) {
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printf("%s: Cannot create kstat.%s.%s.%s tree!\n", __func__,
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module, class, name);
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sysctl_ctx_free(&ksp->ks_sysctl_ctx);
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free(ksp, M_KSTAT);
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return (NULL);
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}
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ksp->ks_sysctl_root = root;
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return (ksp);
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}
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static int
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kstat_sysctl(SYSCTL_HANDLER_ARGS)
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{
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kstat_t *ksp = arg1;
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kstat_named_t *ksent = ksp->ks_data;
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uint64_t val;
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/* Select the correct element */
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ksent += arg2;
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/* Update the aggsums before reading */
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(void) ksp->ks_update(ksp, KSTAT_READ);
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val = ksent->value.ui64;
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return (sysctl_handle_64(oidp, &val, 0, req));
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}
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static int
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kstat_sysctl_string(SYSCTL_HANDLER_ARGS)
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{
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kstat_t *ksp = arg1;
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kstat_named_t *ksent = ksp->ks_data;
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char *val;
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uint32_t len = 0;
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/* Select the correct element */
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ksent += arg2;
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/* Update the aggsums before reading */
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(void) ksp->ks_update(ksp, KSTAT_READ);
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val = KSTAT_NAMED_STR_PTR(ksent);
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len = KSTAT_NAMED_STR_BUFLEN(ksent);
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val[len-1] = '\0';
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return (sysctl_handle_string(oidp, val, len, req));
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}
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void
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kstat_install(kstat_t *ksp)
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{
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kstat_named_t *ksent;
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char *namelast;
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int typelast;
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ksent = ksp->ks_data;
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if (ksp->ks_ndata == UINT32_MAX) {
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#ifdef INVARIANTS
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printf("can't handle raw ops yet!!!\n");
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#endif
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return;
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}
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if (ksent == NULL) {
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printf("%s ksp->ks_data == NULL!!!!\n", __func__);
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return;
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}
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typelast = 0;
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namelast = NULL;
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for (int i = 0; i < ksp->ks_ndata; i++, ksent++) {
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if (ksent->data_type != 0) {
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typelast = ksent->data_type;
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namelast = ksent->name;
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}
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switch (typelast) {
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case KSTAT_DATA_CHAR:
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/* Not Implemented */
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break;
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case KSTAT_DATA_INT32:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_S32 | CTLFLAG_RD, ksp, i,
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kstat_sysctl, "I", namelast);
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break;
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case KSTAT_DATA_UINT32:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_U32 | CTLFLAG_RD, ksp, i,
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kstat_sysctl, "IU", namelast);
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break;
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case KSTAT_DATA_INT64:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_S64 | CTLFLAG_RD, ksp, i,
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kstat_sysctl, "Q", namelast);
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break;
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case KSTAT_DATA_UINT64:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_U64 | CTLFLAG_RD, ksp, i,
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kstat_sysctl, "QU", namelast);
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break;
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case KSTAT_DATA_LONG:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_LONG | CTLFLAG_RD, ksp, i,
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kstat_sysctl, "L", namelast);
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break;
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case KSTAT_DATA_ULONG:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_ULONG | CTLFLAG_RD, ksp, i,
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kstat_sysctl, "LU", namelast);
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break;
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case KSTAT_DATA_STRING:
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SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
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SYSCTL_CHILDREN(ksp->ks_sysctl_root),
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OID_AUTO, namelast,
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CTLTYPE_STRING | CTLFLAG_RD, ksp, i,
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kstat_sysctl_string, "A", namelast);
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break;
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default:
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panic("unsupported type: %d", typelast);
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}
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}
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}
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void
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kstat_delete(kstat_t *ksp)
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{
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sysctl_ctx_free(&ksp->ks_sysctl_ctx);
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free(ksp, M_KSTAT);
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}
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void
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kstat_waitq_enter(kstat_io_t *kiop)
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{
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hrtime_t new, delta;
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ulong_t wcnt;
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new = gethrtime();
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delta = new - kiop->wlastupdate;
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kiop->wlastupdate = new;
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wcnt = kiop->wcnt++;
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if (wcnt != 0) {
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kiop->wlentime += delta * wcnt;
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kiop->wtime += delta;
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}
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}
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void
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kstat_waitq_exit(kstat_io_t *kiop)
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{
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hrtime_t new, delta;
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ulong_t wcnt;
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new = gethrtime();
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delta = new - kiop->wlastupdate;
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kiop->wlastupdate = new;
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wcnt = kiop->wcnt--;
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ASSERT((int)wcnt > 0);
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kiop->wlentime += delta * wcnt;
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kiop->wtime += delta;
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}
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void
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kstat_runq_enter(kstat_io_t *kiop)
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{
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hrtime_t new, delta;
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ulong_t rcnt;
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new = gethrtime();
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delta = new - kiop->rlastupdate;
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kiop->rlastupdate = new;
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rcnt = kiop->rcnt++;
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if (rcnt != 0) {
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kiop->rlentime += delta * rcnt;
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kiop->rtime += delta;
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}
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}
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void
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kstat_runq_exit(kstat_io_t *kiop)
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{
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hrtime_t new, delta;
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ulong_t rcnt;
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new = gethrtime();
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delta = new - kiop->rlastupdate;
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kiop->rlastupdate = new;
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rcnt = kiop->rcnt--;
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ASSERT((int)rcnt > 0);
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kiop->rlentime += delta * rcnt;
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kiop->rtime += delta;
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}
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