xref: /illumos-gate/usr/src/cmd/fm/fmd/common/fmd_buf.c (revision fc910014e8a32a65612105835a10995f2c13d942)
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 #include <fmd_alloc.h>
29 #include <fmd_string.h>
30 #include <fmd_subr.h>
31 #include <fmd_buf.h>
32 #include <fmd.h>
33 
34 static fmd_buf_t *
35 fmd_buf_alloc(const char *name, size_t size)
36 {
37 	fmd_buf_t *bp = fmd_alloc(sizeof (fmd_buf_t), FMD_SLEEP);
38 
39 	bp->buf_name = fmd_strdup(name, FMD_SLEEP);
40 	bp->buf_next = NULL;
41 	bp->buf_data = fmd_zalloc(size, FMD_SLEEP);
42 	bp->buf_size = size;
43 	bp->buf_flags = FMD_BUF_DIRTY;
44 
45 	return (bp);
46 }
47 
48 static void
49 fmd_buf_free(fmd_buf_t *bp)
50 {
51 	fmd_strfree(bp->buf_name);
52 	fmd_free(bp->buf_data, bp->buf_size);
53 	fmd_free(bp, sizeof (fmd_buf_t));
54 }
55 
56 void
57 fmd_buf_hash_create(fmd_buf_hash_t *bhp)
58 {
59 	bhp->bh_hashlen = fmd.d_str_buckets;
60 	bhp->bh_hash = fmd_zalloc(sizeof (void *) * bhp->bh_hashlen, FMD_SLEEP);
61 	bhp->bh_count = 0;
62 }
63 
64 size_t
65 fmd_buf_hash_destroy(fmd_buf_hash_t *bhp)
66 {
67 	size_t total = 0;
68 	fmd_buf_t *bp, *np;
69 	uint_t i;
70 
71 	for (i = 0; i < bhp->bh_hashlen; i++) {
72 		for (bp = bhp->bh_hash[i]; bp != NULL; bp = np) {
73 			np = bp->buf_next;
74 			total += bp->buf_size;
75 			fmd_buf_free(bp);
76 		}
77 	}
78 
79 	fmd_free(bhp->bh_hash, sizeof (void *) * bhp->bh_hashlen);
80 	bzero(bhp, sizeof (fmd_buf_hash_t));
81 	return (total);
82 }
83 
84 void
85 fmd_buf_hash_apply(fmd_buf_hash_t *bhp, fmd_buf_f *func, void *arg)
86 {
87 	fmd_buf_t *bp;
88 	uint_t i;
89 
90 	for (i = 0; i < bhp->bh_hashlen; i++) {
91 		for (bp = bhp->bh_hash[i]; bp != NULL; bp = bp->buf_next)
92 			func(bp, arg);
93 	}
94 }
95 
96 void
97 fmd_buf_hash_commit(fmd_buf_hash_t *bhp)
98 {
99 	fmd_buf_t *bp;
100 	uint_t i;
101 
102 	for (i = 0; i < bhp->bh_hashlen; i++) {
103 		for (bp = bhp->bh_hash[i]; bp != NULL; bp = bp->buf_next)
104 			bp->buf_flags &= ~FMD_BUF_DIRTY;
105 	}
106 }
107 
108 uint_t
109 fmd_buf_hash_count(fmd_buf_hash_t *bhp)
110 {
111 	return (bhp->bh_count);
112 }
113 
114 fmd_buf_t *
115 fmd_buf_insert(fmd_buf_hash_t *bhp, const char *name, size_t size)
116 {
117 	uint_t h = fmd_strhash(name) % bhp->bh_hashlen;
118 	fmd_buf_t *bp = fmd_buf_alloc(name, size);
119 
120 	bp->buf_next = bhp->bh_hash[h];
121 	bhp->bh_hash[h] = bp;
122 	bhp->bh_count++;
123 
124 	return (bp);
125 }
126 
127 fmd_buf_t *
128 fmd_buf_lookup(fmd_buf_hash_t *bhp, const char *name)
129 {
130 	uint_t h = fmd_strhash(name) % bhp->bh_hashlen;
131 	fmd_buf_t *bp;
132 
133 	for (bp = bhp->bh_hash[h]; bp != NULL; bp = bp->buf_next) {
134 		if (strcmp(name, bp->buf_name) == 0)
135 			return (bp);
136 	}
137 
138 	return (NULL);
139 }
140 
141 void
142 fmd_buf_delete(fmd_buf_hash_t *bhp, const char *name)
143 {
144 	uint_t h = fmd_strhash(name) % bhp->bh_hashlen;
145 	fmd_buf_t *bp, **pp = &bhp->bh_hash[h];
146 
147 	for (bp = *pp; bp != NULL; bp = bp->buf_next) {
148 		if (strcmp(bp->buf_name, name) != 0)
149 			pp = &bp->buf_next;
150 		else
151 			break;
152 	}
153 
154 	if (bp != NULL) {
155 		*pp = bp->buf_next;
156 		fmd_buf_free(bp);
157 		ASSERT(bhp->bh_count != 0);
158 		bhp->bh_count--;
159 	}
160 }
161