1 /* $NetBSD: misc.c,v 1.1 2009/08/07 20:57:57 haad 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 } 167