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

   1 /*      $NetBSD: misc.c,v 1.1 2009/03/26 22:11:45 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/cdefs.h>
  59 /* __FBSDID("$FreeBSD: src/sys/compat/opensolaris/kern/opensolaris_misc.c,v 1.2 2007/04/23 00:52:06 pjd Exp $"); */
  60
  61 #include <sys/mount.h>
  62 #include <sys/param.h>
  63 #include <sys/kernel.h>
  64 #include <sys/systm.h>
  65 #include <sys/misc.h>
  66 #include <sys/sunddi.h>
  67 #include <sys/utsname.h>
  68 #include <sys/vnode.h>
  69 #include <sys/mount.h>
  70 #include <sys/pool.h>
  71 #include <sys/buf.h>
  72
  73 char hw_serial[11] = "0";
  74
  75 struct utsname utsname = {
  76         .nodename = "XXXNETBSD"
  77 };
  78
  79 int
  80 vn_is_readonly(vnode_t *vp)
  81 {
  82
  83         return (vp->v_mount->mnt_flag & MNT_RDONLY);
  84 }
  85
  86 kthread_t *
  87 thread_create(void * stk, size_t stksize, void (*proc)(), void *arg,
  88               size_t len, proc_t *pp, int state, pri_t pri)
  89 {
  90         int error;
  91         lwp_t *thr;
  92
  93         ASSERT(stk == NULL && stksize == 0 && len == 0);
  94         ASSERT(state == TS_RUN);
  95
  96         error = kthread_create(pri, KTHREAD_MPSAFE, NULL,
  97             proc, arg, &thr, "zfs");
  98         KASSERT(error == 0);
  99         return thr;
 100 }
 101
 102 void
 103 thread_exit(void)
 104 {
 105
 106         kthread_exit(0);
 107 }
 108
 109 void
 110 kmem_reap(void)
 111 {
 112         int bufcnt;
 113         uint64_t where;
 114         struct pool *pp;
 115
 116         /*
 117          * start draining pool resources now that we're not
 118          * holding any locks.
 119          */
 120         pool_drain_start(&pp, &where);
 121
 122         bufcnt = uvmexp.freetarg - uvmexp.free;
 123         if (bufcnt < 0)
 124                 bufcnt = 0;
 125         /*
 126          * kill unused metadata buffers.
 127          */
 128         mutex_enter(&bufcache_lock);
 129         buf_drain(bufcnt << PAGE_SHIFT);
 130         mutex_exit(&bufcache_lock);
 131
 132         /*
 133          * complete draining the pools.
 134          */
 135         pool_drain_end(pp, where);
 136 //      printf("XXXNETBSD kmem_reap called, write me\n");
 137 }
 138
 139 /*
 140  * Zero out the structure, set the size of the requested/returned bitmaps,
 141  * set AT_XVATTR in the embedded vattr_t's va_mask, and set up the pointer
 142  * to the returned attributes array.
 143  */
 144 void
 145 xva_init(xvattr_t *xvap)
 146 {
 147         bzero(xvap, sizeof (xvattr_t));
 148         xvap->xva_mapsize = XVA_MAPSIZE;
 149         xvap->xva_magic = XVA_MAGIC;
 150         xvap->xva_vattr.va_mask = AT_XVATTR;
 151         xvap->xva_rtnattrmapp = &(xvap->xva_rtnattrmap)[0];
 152 }
 153
 154
 155 /*
 156  * If AT_XVATTR is set, returns a pointer to the embedded xoptattr_t
 157  * structure.  Otherwise, returns NULL.
 158  */
 159 xoptattr_t *
 160 xva_getxoptattr(xvattr_t *xvap)
 161 {
 162         xoptattr_t *xoap = NULL;
 163         if (xvap->xva_vattr.va_mask & AT_XVATTR)
 164                 xoap = &xvap->xva_xoptattrs;
 165         return (xoap);
 166 }