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 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 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