[PATCH] Defer engine ops verification check
[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>
97fbdfa1 8#include <fcntl.h>
ea421790 9#include <linux/unistd.h>
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10
11#define FIO_HAVE_LIBAIO
12#define FIO_HAVE_POSIXAIO
13#define FIO_HAVE_FADVISE
14#define FIO_HAVE_CPU_AFFINITY
15#define FIO_HAVE_DISK_UTIL
16#define FIO_HAVE_SGIO
ba4f8923 17#define FIO_HAVE_IOPRIO
8756e4d4 18#define FIO_HAVE_SPLICE
22f78b32 19#define FIO_HAVE_IOSCHED_SWITCH
2c0ecd28 20#define FIO_HAVE_ODIRECT
74b025b0 21#define FIO_HAVE_HUGETLB
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22
23/*
24 * Only for x86 currently
25 */
26#if defined(__i386__)
a4f4fdd7 27#define FIO_HAVE_SYSLET
b6959b55 28#endif
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29
30#define OS_MAP_ANON (MAP_ANONYMOUS)
31
32typedef cpu_set_t os_cpu_mask_t;
6dfd46b9 33typedef struct drand48_data os_random_state_t;
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34
35/*
36 * we want fadvise64 really, but it's so tangled... later
37 */
38#define fadvise(fd, off, len, advice) \
39 posix_fadvise((fd), (off_t)(off), (len), (advice))
40
41#define fio_setaffinity(td) \
42 sched_setaffinity((td)->pid, sizeof((td)->cpumask), &(td)->cpumask)
43#define fio_getaffinity(pid, ptr) \
44 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
45
46static inline int ioprio_set(int which, int who, int ioprio)
47{
48 return syscall(__NR_ioprio_set, which, who, ioprio);
49}
50
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51/*
52 * Just check for SPLICE_F_MOVE, if that isn't there, assume the others
53 * aren't either.
54 */
55#ifndef SPLICE_F_MOVE
56#define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
57#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
58 /* we may still block on the fd we splice */
59 /* from/to, of course */
60#define SPLICE_F_MORE (0x04) /* expect more data */
61#define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
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62
63static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
64 size_t len, unsigned long flags)
65{
97fbdfa1 66 return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
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67}
68
69static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
70{
97fbdfa1 71 return syscall(__NR_sys_tee, fdin, fdout, len, flags);
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72}
73
74static inline int vmsplice(int fd, const struct iovec *iov,
75 unsigned long nr_segs, unsigned int flags)
76{
97fbdfa1 77 return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
8756e4d4 78}
97fbdfa1 79#endif
8756e4d4 80
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81#define SPLICE_DEF_SIZE (64*1024)
82
b6959b55 83#ifdef FIO_HAVE_SYSLET
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84/*
85 * syslet stuff
86 */
87static inline long async_register(void *uah, unsigned int len)
88{
89 return syscall(__NR_async_register, uah, len);
90}
91
92static inline void *async_exec(void *data)
93{
94 return (void *) syscall(__NR_async_exec, data);
95}
96
97static inline long async_wait(unsigned long min_events)
98{
99 return syscall(__NR_async_wait, min_events);
100}
101
102static inline long async_unregister(void *uah, unsigned int len)
103{
104 return syscall(__NR_async_unregister, uah, len);
105}
106
107static inline long umem_add(unsigned long *uptr, unsigned long inc)
108{
109 return syscall(__NR_umem_add, uptr, inc);
110}
b6959b55 111#endif /* FIO_HAVE_SYSLET */
a4f4fdd7 112
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113enum {
114 IOPRIO_WHO_PROCESS = 1,
115 IOPRIO_WHO_PGRP,
116 IOPRIO_WHO_USER,
117};
118
119#define IOPRIO_CLASS_SHIFT 13
120
121#ifndef BLKGETSIZE64
122#define BLKGETSIZE64 _IOR(0x12,114,size_t)
123#endif
124
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125#ifndef BLKFLSBUF
126#define BLKFLSBUF _IO(0x12,97)
127#endif
128
129static inline int blockdev_invalidate_cache(int fd)
130{
131 if (!ioctl(fd, BLKFLSBUF))
132 return 0;
133
134 return errno;
135}
136
9104f874 137static inline int blockdev_size(int fd, unsigned long long *bytes)
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138{
139 if (!ioctl(fd, BLKGETSIZE64, bytes))
140 return 0;
141
142 return errno;
143}
144
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145static inline unsigned long long os_phys_mem(void)
146{
147 long pagesize, pages;
148
149 pagesize = sysconf(_SC_PAGESIZE);
150 pages = sysconf(_SC_PHYS_PAGES);
151 if (pages == -1 || pagesize == -1)
152 return 0;
153
154 return (unsigned long long) pages * (unsigned long long) pagesize;
155}
156
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157static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
158{
159 srand48_r(seed, rs);
160}
161
162static inline long os_random_long(os_random_state_t *rs)
163{
164 long val;
165
166 lrand48_r(rs, &val);
167 return val;
168}
169
170static inline double os_random_double(os_random_state_t *rs)
171{
172 double val;
173
174 drand48_r(rs, &val);
175 return val;
176}
177
ebac4655 178#endif