chfs_pool.c revision 1.1.2.2
1 /* $NetBSD: chfs_pool.c,v 1.1.2.2 2012/03/06 09:56:29 mrg 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 50 void * chfs_pool_page_alloc(struct pool *, int); 51 void chfs_pool_page_free(struct pool *, void *); 52 53 extern void* pool_page_alloc_nointr(struct pool *, int); 54 extern void pool_page_free_nointr(struct pool *, void *); 55 56 /* --------------------------------------------------------------------- */ 57 58 struct pool_allocator chfs_pool_allocator = { 59 .pa_alloc = chfs_pool_page_alloc, 60 .pa_free = chfs_pool_page_free, 61 }; 62 63 /* --------------------------------------------------------------------- */ 64 65 void 66 chfs_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 82 void 83 chfs_pool_destroy(struct chfs_pool *chpp) 84 { 85 pool_destroy((struct pool *)chpp); 86 } 87 88 /* --------------------------------------------------------------------- */ 89 90 void * 91 chfs_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 /* --------------------------------------------------------------------- */ 116 117 void 118 chfs_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 /* --------------------------------------------------------------------- */ 132 133 void 134 chfs_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 /* --------------------------------------------------------------------- */ 148 149 void 150 chfs_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 /* --------------------------------------------------------------------- */ 164 165 char * 166 chfs_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 /* --------------------------------------------------------------------- */ 189 190 void 191 chfs_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
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