1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
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 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
25 * Copyright (c) 2016 Actifio, Inc. All rights reserved.
26 * Copyright (c) 2025, Klara, Inc.
27 */
28
29 #include <sys/kmem.h>
30
31 char *
kmem_vasprintf(const char * fmt,va_list adx)32 kmem_vasprintf(const char *fmt, va_list adx)
33 {
34 char *buf = NULL;
35 va_list adx_copy;
36
37 va_copy(adx_copy, adx);
38 VERIFY(vasprintf(&buf, fmt, adx_copy) != -1);
39 va_end(adx_copy);
40
41 return (buf);
42 }
43
44 char *
kmem_asprintf(const char * fmt,...)45 kmem_asprintf(const char *fmt, ...)
46 {
47 char *buf = NULL;
48 va_list adx;
49
50 va_start(adx, fmt);
51 VERIFY(vasprintf(&buf, fmt, adx) != -1);
52 va_end(adx);
53
54 return (buf);
55 }
56
57 /*
58 * kmem_scnprintf() will return the number of characters that it would have
59 * printed whenever it is limited by value of the size variable, rather than
60 * the number of characters that it did print. This can cause misbehavior on
61 * subsequent uses of the return value, so we define a safe version that will
62 * return the number of characters actually printed, minus the NULL format
63 * character. Subsequent use of this by the safe string functions is safe
64 * whether it is snprintf(), strlcat() or strlcpy().
65 */
66 int
kmem_scnprintf(char * restrict str,size_t size,const char * restrict fmt,...)67 kmem_scnprintf(char *restrict str, size_t size, const char *restrict fmt, ...)
68 {
69 int n;
70 va_list ap;
71
72 /* Make the 0 case a no-op so that we do not return -1 */
73 if (size == 0)
74 return (0);
75
76 va_start(ap, fmt);
77 n = vsnprintf(str, size, fmt, ap);
78 va_end(ap);
79
80 if (n >= size)
81 n = size - 1;
82
83 return (n);
84 }
85
86 fstrans_cookie_t
spl_fstrans_mark(void)87 spl_fstrans_mark(void)
88 {
89 return ((fstrans_cookie_t)0);
90 }
91
92 void
spl_fstrans_unmark(fstrans_cookie_t cookie)93 spl_fstrans_unmark(fstrans_cookie_t cookie)
94 {
95 (void) cookie;
96 }
97
98 int
kmem_cache_reap_active(void)99 kmem_cache_reap_active(void)
100 {
101 return (0);
102 }
103