1 /*
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice(s), this list of conditions and the following disclaimer as
11 * the first lines of this file unmodified other than the possible
12 * addition of one or more copyright notices.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice(s), this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
25 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
27 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
28 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/param.h>
32 #include <sys/filio.h>
33 #include <sys/mman.h>
34
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <string.h>
38 #include <unistd.h>
39
40 #include "libc_private.h"
41
42 __weak_reference(shm_open, _shm_open);
43 __weak_reference(shm_open, __sys_shm_open);
44
45 int
shm_open(const char * path,int flags,mode_t mode)46 shm_open(const char *path, int flags, mode_t mode)
47 {
48 return (__sys_shm_open2(path, flags | O_CLOEXEC, mode, 0, NULL));
49 }
50
51 int
shm_create_largepage(const char * path,int flags,int psind,int alloc_policy,mode_t mode)52 shm_create_largepage(const char *path, int flags, int psind, int alloc_policy,
53 mode_t mode)
54 {
55 struct shm_largepage_conf slc;
56 int error, fd, saved_errno;
57
58 fd = __sys_shm_open2(path, flags | O_CREAT, mode, SHM_LARGEPAGE, NULL);
59 if (fd == -1)
60 return (-1);
61
62 memset(&slc, 0, sizeof(slc));
63 slc.psind = psind;
64 slc.alloc_policy = alloc_policy;
65 error = ioctl(fd, FIOSSHMLPGCNF, &slc);
66 if (error == -1) {
67 saved_errno = errno;
68 close(fd);
69 errno = saved_errno;
70 return (-1);
71 }
72 return (fd);
73 }
74