1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2020 Dmitry Kozlyuk
3 */
4
5 #include <sys/file.h>
6 #include <fcntl.h>
7 #include <unistd.h>
8
9 #include <rte_errno.h>
10
11 #include "eal_private.h"
12
13 int
eal_file_open(const char * path,int flags)14 eal_file_open(const char *path, int flags)
15 {
16 static const int MODE_MASK = EAL_OPEN_READONLY | EAL_OPEN_READWRITE;
17
18 int ret, sys_flags;
19
20 switch (flags & MODE_MASK) {
21 case EAL_OPEN_READONLY:
22 sys_flags = O_RDONLY;
23 break;
24 case EAL_OPEN_READWRITE:
25 sys_flags = O_RDWR;
26 break;
27 default:
28 rte_errno = ENOTSUP;
29 return -1;
30 }
31
32 if (flags & EAL_OPEN_CREATE)
33 sys_flags |= O_CREAT;
34
35 ret = open(path, sys_flags, 0600);
36 if (ret < 0)
37 rte_errno = errno;
38
39 return ret;
40 }
41
42 int
eal_file_truncate(int fd,ssize_t size)43 eal_file_truncate(int fd, ssize_t size)
44 {
45 int ret;
46
47 ret = ftruncate(fd, size);
48 if (ret)
49 rte_errno = errno;
50
51 return ret;
52 }
53
54 int
eal_file_lock(int fd,enum eal_flock_op op,enum eal_flock_mode mode)55 eal_file_lock(int fd, enum eal_flock_op op, enum eal_flock_mode mode)
56 {
57 int sys_flags = 0;
58 int ret;
59
60 if (mode == EAL_FLOCK_RETURN)
61 sys_flags |= LOCK_NB;
62
63 switch (op) {
64 case EAL_FLOCK_EXCLUSIVE:
65 sys_flags |= LOCK_EX;
66 break;
67 case EAL_FLOCK_SHARED:
68 sys_flags |= LOCK_SH;
69 break;
70 case EAL_FLOCK_UNLOCK:
71 sys_flags |= LOCK_UN;
72 break;
73 }
74
75 ret = flock(fd, sys_flags);
76 if (ret)
77 rte_errno = errno;
78
79 return ret;
80 }
81