[PATCH] Get _syscallX() functions from <linux/unistd.h>
[fio.git] / os-linux.h
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1#ifndef FIO_OS_LINUX_H
2#define FIO_OS_LINUX_H
3
4#include <sys/ioctl.h>
8756e4d4 5#include <sys/uio.h>
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6#include <sys/syscall.h>
7#include <unistd.h>
ea421790 8#include <linux/unistd.h>
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9
10#define FIO_HAVE_LIBAIO
11#define FIO_HAVE_POSIXAIO
12#define FIO_HAVE_FADVISE
13#define FIO_HAVE_CPU_AFFINITY
14#define FIO_HAVE_DISK_UTIL
15#define FIO_HAVE_SGIO
ba4f8923 16#define FIO_HAVE_IOPRIO
8756e4d4 17#define FIO_HAVE_SPLICE
22f78b32 18#define FIO_HAVE_IOSCHED_SWITCH
2c0ecd28 19#define FIO_HAVE_ODIRECT
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20
21#define OS_MAP_ANON (MAP_ANONYMOUS)
22
23typedef cpu_set_t os_cpu_mask_t;
6dfd46b9 24typedef struct drand48_data os_random_state_t;
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25
26/*
27 * we want fadvise64 really, but it's so tangled... later
28 */
29#define fadvise(fd, off, len, advice) \
30 posix_fadvise((fd), (off_t)(off), (len), (advice))
31
32#define fio_setaffinity(td) \
33 sched_setaffinity((td)->pid, sizeof((td)->cpumask), &(td)->cpumask)
34#define fio_getaffinity(pid, ptr) \
35 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
36
37static inline int ioprio_set(int which, int who, int ioprio)
38{
39 return syscall(__NR_ioprio_set, which, who, ioprio);
40}
41
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42static _syscall6(int, sys_splice, int, fdin, loff_t *, off_in, int, fdout, loff_t *, off_out, size_t, len, unsigned int, flags);
43static _syscall4(int, sys_vmsplice, int, fd, const struct iovec *, iov, unsigned long, nr_segs, unsigned int, flags);
44static _syscall4(int, sys_tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
45
46static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
47 size_t len, unsigned long flags)
48{
49 return sys_splice(fdin, off_in, fdout, off_out, len, flags);
50}
51
52static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
53{
54 return sys_tee(fdin, fdout, len, flags);
55}
56
57static inline int vmsplice(int fd, const struct iovec *iov,
58 unsigned long nr_segs, unsigned int flags)
59{
60 return sys_vmsplice(fd, iov, nr_segs, flags);
61}
62
63#define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
64#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
65 /* we may still block on the fd we splice */
66 /* from/to, of course */
67#define SPLICE_F_MORE (0x04) /* expect more data */
68#define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
69
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70#define SPLICE_DEF_SIZE (64*1024)
71
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72enum {
73 IOPRIO_WHO_PROCESS = 1,
74 IOPRIO_WHO_PGRP,
75 IOPRIO_WHO_USER,
76};
77
78#define IOPRIO_CLASS_SHIFT 13
79
80#ifndef BLKGETSIZE64
81#define BLKGETSIZE64 _IOR(0x12,114,size_t)
82#endif
83
9104f874 84static inline int blockdev_size(int fd, unsigned long long *bytes)
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85{
86 if (!ioctl(fd, BLKGETSIZE64, bytes))
87 return 0;
88
89 return errno;
90}
91
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92static inline unsigned long long os_phys_mem(void)
93{
94 long pagesize, pages;
95
96 pagesize = sysconf(_SC_PAGESIZE);
97 pages = sysconf(_SC_PHYS_PAGES);
98 if (pages == -1 || pagesize == -1)
99 return 0;
100
101 return (unsigned long long) pages * (unsigned long long) pagesize;
102}
103
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104static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
105{
106 srand48_r(seed, rs);
107}
108
109static inline long os_random_long(os_random_state_t *rs)
110{
111 long val;
112
113 lrand48_r(rs, &val);
114 return val;
115}
116
117static inline double os_random_double(os_random_state_t *rs)
118{
119 double val;
120
121 drand48_r(rs, &val);
122 return val;
123}
124
ebac4655 125#endif