usr/src/cmd/fm/fmd/common/fmd_buf.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 /*
  24  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 #pragma ident   "%Z%%M% %I%     %E% SMI"
  29
  30 #include <fmd_alloc.h>
  31 #include <fmd_string.h>
  32 #include <fmd_subr.h>
  33 #include <fmd_buf.h>
  34 #include <fmd.h>
  35
  36 static fmd_buf_t *
  37 fmd_buf_alloc(const char *name, size_t size)
  38 {
  39         fmd_buf_t *bp = fmd_alloc(sizeof (fmd_buf_t), FMD_SLEEP);
  40
  41         bp->buf_name = fmd_strdup(name, FMD_SLEEP);
  42         bp->buf_next = NULL;
  43         bp->buf_data = fmd_zalloc(size, FMD_SLEEP);
  44         bp->buf_size = size;
  45         bp->buf_flags = FMD_BUF_DIRTY;
  46
  47         return (bp);
  48 }
  49
  50 static void
  51 fmd_buf_free(fmd_buf_t *bp)
  52 {
  53         fmd_strfree(bp->buf_name);
  54         fmd_free(bp->buf_data, bp->buf_size);
  55         fmd_free(bp, sizeof (fmd_buf_t));
  56 }
  57
  58 void
  59 fmd_buf_hash_create(fmd_buf_hash_t *bhp)
  60 {
  61         bhp->bh_hashlen = fmd.d_str_buckets;
  62         bhp->bh_hash = fmd_zalloc(sizeof (void *) * bhp->bh_hashlen, FMD_SLEEP);
  63         bhp->bh_count = 0;
  64 }
  65
  66 size_t
  67 fmd_buf_hash_destroy(fmd_buf_hash_t *bhp)
  68 {
  69         size_t total = 0;
  70         fmd_buf_t *bp, *np;
  71         uint_t i;
  72
  73         for (i = 0; i < bhp->bh_hashlen; i++) {
  74                 for (bp = bhp->bh_hash[i]; bp != NULL; bp = np) {
  75                         np = bp->buf_next;
  76                         total += bp->buf_size;
  77                         fmd_buf_free(bp);
  78                 }
  79         }
  80
  81         fmd_free(bhp->bh_hash, sizeof (void *) * bhp->bh_hashlen);
  82         bzero(bhp, sizeof (fmd_buf_hash_t));
  83         return (total);
  84 }
  85
  86 void
  87 fmd_buf_hash_apply(fmd_buf_hash_t *bhp, fmd_buf_f *func, void *arg)
  88 {
  89         fmd_buf_t *bp;
  90         uint_t i;
  91
  92         for (i = 0; i < bhp->bh_hashlen; i++) {
  93                 for (bp = bhp->bh_hash[i]; bp != NULL; bp = bp->buf_next)
  94                         func(bp, arg);
  95         }
  96 }
  97
  98 void
  99 fmd_buf_hash_commit(fmd_buf_hash_t *bhp)
 100 {
 101         fmd_buf_t *bp;
 102         uint_t i;
 103
 104         for (i = 0; i < bhp->bh_hashlen; i++) {
 105                 for (bp = bhp->bh_hash[i]; bp != NULL; bp = bp->buf_next)
 106                         bp->buf_flags &= ~FMD_BUF_DIRTY;
 107         }
 108 }
 109
 110 uint_t
 111 fmd_buf_hash_count(fmd_buf_hash_t *bhp)
 112 {
 113         return (bhp->bh_count);
 114 }
 115
 116 fmd_buf_t *
 117 fmd_buf_insert(fmd_buf_hash_t *bhp, const char *name, size_t size)
 118 {
 119         uint_t h = fmd_strhash(name) % bhp->bh_hashlen;
 120         fmd_buf_t *bp = fmd_buf_alloc(name, size);
 121
 122         bp->buf_next = bhp->bh_hash[h];
 123         bhp->bh_hash[h] = bp;
 124         bhp->bh_count++;
 125
 126         return (bp);
 127 }
 128
 129 fmd_buf_t *
 130 fmd_buf_lookup(fmd_buf_hash_t *bhp, const char *name)
 131 {
 132         uint_t h = fmd_strhash(name) % bhp->bh_hashlen;
 133         fmd_buf_t *bp;
 134
 135         for (bp = bhp->bh_hash[h]; bp != NULL; bp = bp->buf_next) {
 136                 if (strcmp(name, bp->buf_name) == 0)
 137                         return (bp);
 138         }
 139
 140         return (NULL);
 141 }
 142
 143 void
 144 fmd_buf_delete(fmd_buf_hash_t *bhp, const char *name)
 145 {
 146         uint_t h = fmd_strhash(name) % bhp->bh_hashlen;
 147         fmd_buf_t *bp, **pp = &bhp->bh_hash[h];
 148
 149         for (bp = *pp; bp != NULL; bp = bp->buf_next) {
 150                 if (strcmp(bp->buf_name, name) != 0)
 151                         pp = &bp->buf_next;
 152                 else
 153                         break;
 154         }
 155
 156         if (bp != NULL) {
 157                 *pp = bp->buf_next;
 158                 fmd_buf_free(bp);
 159                 ASSERT(bhp->bh_count != 0);
 160                 bhp->bh_count--;
 161         }
 162 }