chfs_pool.c revision 1.2.2.2
1 /* $NetBSD: chfs_pool.c,v 1.2.2.2 2012/04/17 00:08:54 yamt 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 /* --------------------------------------------------------------------- */ 54 55 struct pool_allocator chfs_pool_allocator = { 56 .pa_alloc = chfs_pool_page_alloc, 57 .pa_free = chfs_pool_page_free, 58 }; 59 60 /* --------------------------------------------------------------------- */ 61 62 void 63 chfs_pool_init(struct chfs_pool *chpp, size_t size, const char *what, 64 struct chfs_mount *chmp) 65 { 66 int cnt; 67 68 cnt = snprintf(chpp->chp_name, sizeof(chpp->chp_name), 69 "%s_chfs_%p", what, chmp); 70 KASSERT(cnt < sizeof(chpp->chp_name)); 71 72 pool_init(&chpp->chp_pool, size, 0, 0, 0, chpp->chp_name, 73 &chfs_pool_allocator, IPL_NONE); 74 chpp->chp_mount = chmp; 75 } 76 77 /* --------------------------------------------------------------------- */ 78 79 void 80 chfs_pool_destroy(struct chfs_pool *chpp) 81 { 82 pool_destroy((struct pool *)chpp); 83 } 84 85 /* --------------------------------------------------------------------- */ 86 87 void * 88 chfs_pool_page_alloc(struct pool *pp, int flags) 89 { 90 struct chfs_pool *chpp; 91 struct chfs_mount *chmp; 92 unsigned int pages; 93 void *page; 94 dbg("CHFS: pool_page_alloc()\n"); 95 96 chpp = (struct chfs_pool *)pp; 97 chmp = chpp->chp_mount; 98 99 pages = atomic_inc_uint_nv(&chmp->chm_pages_used); 100 if (pages >= CHFS_PAGES_MAX(chmp)) { 101 atomic_dec_uint(&chmp->chm_pages_used); 102 return NULL; 103 } 104 page = pool_get(pp, flags | PR_WAITOK); 105 if (page == NULL) { 106 atomic_dec_uint(&chmp->chm_pages_used); 107 } 108 109 return page; 110 } 111 112 /* --------------------------------------------------------------------- */ 113 114 void 115 chfs_pool_page_free(struct pool *pp, void *v) 116 { 117 struct chfs_pool *chpp; 118 struct chfs_mount *chmp; 119 dbg("CHFS: pool_page_free()\n"); 120 121 chpp = (struct chfs_pool *)pp; 122 chmp = chpp->chp_mount; 123 124 atomic_dec_uint(&chmp->chm_pages_used); 125 pool_put(pp,v); 126 } 127 128 /* --------------------------------------------------------------------- */ 129 130 void 131 chfs_str_pool_init(struct chfs_str_pool *chsp, struct chfs_mount *chmp) 132 { 133 dbg("CHFS: str_pool_init()\n"); 134 135 chfs_pool_init(&chsp->chsp_pool_16, 16, "str", chmp); 136 chfs_pool_init(&chsp->chsp_pool_32, 32, "str", chmp); 137 chfs_pool_init(&chsp->chsp_pool_64, 64, "str", chmp); 138 chfs_pool_init(&chsp->chsp_pool_128, 128, "str", chmp); 139 chfs_pool_init(&chsp->chsp_pool_256, 256, "str", chmp); 140 chfs_pool_init(&chsp->chsp_pool_512, 512, "str", chmp); 141 chfs_pool_init(&chsp->chsp_pool_1024, 1024, "str", chmp); 142 } 143 144 /* --------------------------------------------------------------------- */ 145 146 void 147 chfs_str_pool_destroy(struct chfs_str_pool *chsp) 148 { 149 dbg("CHFS: str_pool_destroy()\n"); 150 151 chfs_pool_destroy(&chsp->chsp_pool_16); 152 chfs_pool_destroy(&chsp->chsp_pool_32); 153 chfs_pool_destroy(&chsp->chsp_pool_64); 154 chfs_pool_destroy(&chsp->chsp_pool_128); 155 chfs_pool_destroy(&chsp->chsp_pool_256); 156 chfs_pool_destroy(&chsp->chsp_pool_512); 157 chfs_pool_destroy(&chsp->chsp_pool_1024); 158 } 159 160 /* --------------------------------------------------------------------- */ 161 162 char * 163 chfs_str_pool_get(struct chfs_str_pool *chsp, size_t len, int flags) 164 { 165 struct chfs_pool *p; 166 dbg("CHFS: str_pool_get()\n"); 167 168 KASSERT(len <= 1024); 169 170 if (len <= 16) p = &chsp->chsp_pool_16; 171 else if (len <= 32) p = &chsp->chsp_pool_32; 172 else if (len <= 64) p = &chsp->chsp_pool_64; 173 else if (len <= 128) p = &chsp->chsp_pool_128; 174 else if (len <= 256) p = &chsp->chsp_pool_256; 175 else if (len <= 512) p = &chsp->chsp_pool_512; 176 else if (len <= 1024) p = &chsp->chsp_pool_1024; 177 else { 178 KASSERT(0); 179 p = NULL; /* Silence compiler warnings */ 180 } 181 182 return (char *)CHFS_POOL_GET(p, flags); 183 } 184 185 /* --------------------------------------------------------------------- */ 186 187 void 188 chfs_str_pool_put(struct chfs_str_pool *chsp, char *str, size_t len) 189 { 190 struct chfs_pool *p; 191 dbg("CHFS: str_pool_put()\n"); 192 193 KASSERT(len <= 1024); 194 195 if (len <= 16) p = &chsp->chsp_pool_16; 196 else if (len <= 32) p = &chsp->chsp_pool_32; 197 else if (len <= 64) p = &chsp->chsp_pool_64; 198 else if (len <= 128) p = &chsp->chsp_pool_128; 199 else if (len <= 256) p = &chsp->chsp_pool_256; 200 else if (len <= 512) p = &chsp->chsp_pool_512; 201 else if (len <= 1024) p = &chsp->chsp_pool_1024; 202 else { 203 KASSERT(0); 204 p = NULL; /* Silence compiler warnings */ 205 } 206 207 CHFS_POOL_PUT(p, str); 208 } 209
Indexes created Tue Oct 14 15:09:51 GMT 2025