external/cddl/osnet/sys/kern/kstat.c

   1 /*      $NetBSD: kstat.c,v 1.1 2009/03/26 22:11:46 ad Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Andrew Doran.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*-
  33  * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #include <sys/param.h>
  59 #include <sys/kernel.h>
  60 #include <sys/systm.h>
  61 #include <sys/kmem.h>
  62 #include <sys/sysctl.h>
  63 #include <sys/kstat.h>
  64
  65 kstat_t *
  66 kstat_create(char *module, int instance, char *name, char *class, uchar_t type,
  67              ulong_t ndata, uchar_t flags)
  68 {
  69         struct sysctl_oid *root;
  70         const struct sysctlnode *rnode, *mnode, *cnode;
  71         kstat_t *ks;
  72
  73         KASSERT(instance == 0);
  74         KASSERT(type == KSTAT_TYPE_NAMED);
  75         KASSERT(flags == KSTAT_FLAG_VIRTUAL);
  76
  77         ks = kmem_zalloc(sizeof(*ks), KM_SLEEP);
  78         ks->ks_ndata = ndata;
  79
  80         sysctl_createv(&ks->ks_clog, 0, NULL, &rnode,
  81                 CTLFLAG_PERMANENT,
  82                 CTLTYPE_NODE, "kstat", NULL,
  83                 NULL, 0, NULL, 0,
  84                 CTL_CREATE, CTL_EOL);
  85         sysctl_createv(&ks->ks_clog, 0, &rnode, &mnode,
  86                 CTLFLAG_PERMANENT,
  87                 CTLTYPE_NODE, module, NULL,
  88                 NULL, 0, NULL, 0,
  89                 CTL_CREATE, CTL_EOL);
  90         sysctl_createv(&ks->ks_clog, 0, &mnode, &cnode,
  91                 CTLFLAG_PERMANENT,
  92                 CTLTYPE_NODE, class, NULL,
  93                 NULL, 0, NULL, 0,
  94                 CTL_CREATE, CTL_EOL);
  95         sysctl_createv(&ks->ks_clog, 0, &cnode, &ks->ks_node,
  96                 CTLFLAG_PERMANENT,
  97                 CTLTYPE_NODE, name, NULL,
  98                 NULL, 0, NULL, 0,
  99                 CTL_CREATE, CTL_EOL);
 100
 101         return (ks);
 102 }
 103
 104 void
 105 kstat_install(kstat_t *ks)
 106 {
 107         kstat_named_t *ksent;
 108         u_int i;
 109
 110         ksent = ks->ks_data;
 111
 112         for (i = 0; i < ks->ks_ndata; i++, ksent++) {
 113                 KASSERT(ksent->data_type == KSTAT_DATA_UINT64);
 114                 sysctl_createv(&ks->ks_clog, 0, &ks->ks_node, NULL,
 115                         CTLFLAG_PERMANENT | CTLFLAG_READONLY,
 116                         CTLTYPE_INT, ksent->name, NULL,
 117                         NULL, 0, &ksent->value.ui64, 0,
 118                         CTL_CREATE, CTL_EOL);
 119         }
 120 }
 121
 122 void
 123 kstat_delete(kstat_t *ks)
 124 {
 125
 126         sysctl_teardown(&ks->ks_clog);
 127         kmem_free(ks, sizeof(*ks));
 128 }