chfs_pool.c revision 1.1
1/* $NetBSD: chfs_pool.c,v 1.1 2011/11/24 15:51:31 ahoka Exp $ */ 2 3/*- 4 * Copyright (c) 2010 Department of Software Engineering, 5 * University of Szeged, Hungary 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by the Department of Software Engineering, University of Szeged, Hungary 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33/* 34 * Pool allocator and convenience routines for chfs. 35 */ 36 37#include <sys/cdefs.h> 38 39#include <sys/param.h> 40#include <sys/pool.h> 41#include <sys/atomic.h> 42 43#include <uvm/uvm.h> 44 45#include "chfs.h" 46//#include </root/xipffs/netbsd.chfs/chfs.h> 47 48/* --------------------------------------------------------------------- */ 49 50void * chfs_pool_page_alloc(struct pool *, int); 51void chfs_pool_page_free(struct pool *, void *); 52 53extern void* pool_page_alloc_nointr(struct pool *, int); 54extern void pool_page_free_nointr(struct pool *, void *); 55 56/* --------------------------------------------------------------------- */ 57 58struct pool_allocator chfs_pool_allocator = { 59 .pa_alloc = chfs_pool_page_alloc, 60 .pa_free = chfs_pool_page_free, 61}; 62 63/* --------------------------------------------------------------------- */ 64 65void 66chfs_pool_init(struct chfs_pool *chpp, size_t size, const char *what, 67 struct chfs_mount *chmp) 68{ 69 int cnt; 70 71 cnt = snprintf(chpp->chp_name, sizeof(chpp->chp_name), 72 "%s_chfs_%p", what, chmp); 73 KASSERT(cnt < sizeof(chpp->chp_name)); 74 75 pool_init(&chpp->chp_pool, size, 0, 0, 0, chpp->chp_name, 76 &chfs_pool_allocator, IPL_NONE); 77 chpp->chp_mount = chmp; 78} 79 80/* --------------------------------------------------------------------- */ 81 82void 83chfs_pool_destroy(struct chfs_pool *chpp) 84{ 85 pool_destroy((struct pool *)chpp); 86} 87 88/* --------------------------------------------------------------------- */ 89 90void * 91chfs_pool_page_alloc(struct pool *pp, int flags) 92{ 93 struct chfs_pool *chpp; 94 struct chfs_mount *chmp; 95 unsigned int pages; 96 void *page; 97 dbg("CHFS: pool_page_alloc()\n"); 98 99 chpp = (struct chfs_pool *)pp; 100 chmp = chpp->chp_mount; 101 102 pages = atomic_inc_uint_nv(&chmp->chm_pages_used); 103 if (pages >= CHFS_PAGES_MAX(chmp)) { 104 atomic_dec_uint(&chmp->chm_pages_used); 105 return NULL; 106 } 107 page = pool_page_alloc_nointr(pp, flags | PR_WAITOK); 108 if (page == NULL) { 109 atomic_dec_uint(&chmp->chm_pages_used); 110 } 111 112 return page; 113} 114 115/* --------------------------------------------------------------------- */ 116 117void 118chfs_pool_page_free(struct pool *pp, void *v) 119{ 120 struct chfs_pool *chpp; 121 struct chfs_mount *chmp; 122 dbg("CHFS: pool_page_free()\n"); 123 124 chpp = (struct chfs_pool *)pp; 125 chmp = chpp->chp_mount; 126 127 atomic_dec_uint(&chmp->chm_pages_used); 128 pool_page_free_nointr(pp, v); 129} 130 131/* --------------------------------------------------------------------- */ 132 133void 134chfs_str_pool_init(struct chfs_str_pool *chsp, struct chfs_mount *chmp) 135{ 136 dbg("CHFS: str_pool_init()\n"); 137 138 chfs_pool_init(&chsp->chsp_pool_16, 16, "str", chmp); 139 chfs_pool_init(&chsp->chsp_pool_32, 32, "str", chmp); 140 chfs_pool_init(&chsp->chsp_pool_64, 64, "str", chmp); 141 chfs_pool_init(&chsp->chsp_pool_128, 128, "str", chmp); 142 chfs_pool_init(&chsp->chsp_pool_256, 256, "str", chmp); 143 chfs_pool_init(&chsp->chsp_pool_512, 512, "str", chmp); 144 chfs_pool_init(&chsp->chsp_pool_1024, 1024, "str", chmp); 145} 146 147/* --------------------------------------------------------------------- */ 148 149void 150chfs_str_pool_destroy(struct chfs_str_pool *chsp) 151{ 152 dbg("CHFS: str_pool_destroy()\n"); 153 154 chfs_pool_destroy(&chsp->chsp_pool_16); 155 chfs_pool_destroy(&chsp->chsp_pool_32); 156 chfs_pool_destroy(&chsp->chsp_pool_64); 157 chfs_pool_destroy(&chsp->chsp_pool_128); 158 chfs_pool_destroy(&chsp->chsp_pool_256); 159 chfs_pool_destroy(&chsp->chsp_pool_512); 160 chfs_pool_destroy(&chsp->chsp_pool_1024); 161} 162 163/* --------------------------------------------------------------------- */ 164 165char * 166chfs_str_pool_get(struct chfs_str_pool *chsp, size_t len, int flags) 167{ 168 struct chfs_pool *p; 169 dbg("CHFS: str_pool_get()\n"); 170 171 KASSERT(len <= 1024); 172 173 if (len <= 16) p = &chsp->chsp_pool_16; 174 else if (len <= 32) p = &chsp->chsp_pool_32; 175 else if (len <= 64) p = &chsp->chsp_pool_64; 176 else if (len <= 128) p = &chsp->chsp_pool_128; 177 else if (len <= 256) p = &chsp->chsp_pool_256; 178 else if (len <= 512) p = &chsp->chsp_pool_512; 179 else if (len <= 1024) p = &chsp->chsp_pool_1024; 180 else { 181 KASSERT(0); 182 p = NULL; /* Silence compiler warnings */ 183 } 184 185 return (char *)CHFS_POOL_GET(p, flags); 186} 187 188/* --------------------------------------------------------------------- */ 189 190void 191chfs_str_pool_put(struct chfs_str_pool *chsp, char *str, size_t len) 192{ 193 struct chfs_pool *p; 194 dbg("CHFS: str_pool_put()\n"); 195 196 KASSERT(len <= 1024); 197 198 if (len <= 16) p = &chsp->chsp_pool_16; 199 else if (len <= 32) p = &chsp->chsp_pool_32; 200 else if (len <= 64) p = &chsp->chsp_pool_64; 201 else if (len <= 128) p = &chsp->chsp_pool_128; 202 else if (len <= 256) p = &chsp->chsp_pool_256; 203 else if (len <= 512) p = &chsp->chsp_pool_512; 204 else if (len <= 1024) p = &chsp->chsp_pool_1024; 205 else { 206 KASSERT(0); 207 p = NULL; /* Silence compiler warnings */ 208 } 209 210 CHFS_POOL_PUT(p, str); 211} 212