Fix warning when clang is used as the compiler
[fio.git] / os / os-linux.h
CommitLineData
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1#ifndef FIO_OS_LINUX_H
2#define FIO_OS_LINUX_H
3
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4#define FIO_OS os_linux
5
ebac4655 6#include <sys/ioctl.h>
8756e4d4 7#include <sys/uio.h>
3c39a379 8#include <sys/syscall.h>
2e3bd4c2 9#include <sys/vfs.h>
3c39a379 10#include <unistd.h>
97fbdfa1 11#include <fcntl.h>
3c2d93ed 12#include <errno.h>
d09913c2 13#include <sched.h>
ea421790 14#include <linux/unistd.h>
07e5b264
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15#include <linux/raw.h>
16#include <linux/major.h>
610a730c 17#include <endian.h>
ebac4655 18
f3de88a7 19#include "indirect.h"
79a43187 20#include "binject.h"
e2e58886 21#include "../file.h"
f3de88a7 22
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23#define FIO_HAVE_LIBAIO
24#define FIO_HAVE_POSIXAIO
25#define FIO_HAVE_FADVISE
26#define FIO_HAVE_CPU_AFFINITY
27#define FIO_HAVE_DISK_UTIL
28#define FIO_HAVE_SGIO
ba4f8923 29#define FIO_HAVE_IOPRIO
8756e4d4 30#define FIO_HAVE_SPLICE
22f78b32 31#define FIO_HAVE_IOSCHED_SWITCH
2c0ecd28 32#define FIO_HAVE_ODIRECT
74b025b0 33#define FIO_HAVE_HUGETLB
07e5b264 34#define FIO_HAVE_RAWBIND
5e62c22a 35#define FIO_HAVE_BLKTRACE
5921e80c 36#define FIO_HAVE_STRSEP
fffca02d 37#define FIO_HAVE_FALLOCATE
207cb0f0 38#define FIO_HAVE_POSIXAIO_FSYNC
f356d01d 39#define FIO_HAVE_PSHARED_MUTEX
eb7ccf38 40#define FIO_HAVE_CL_SIZE
a696fa2a 41#define FIO_HAVE_CGROUPS
c36d16f5 42#define FIO_HAVE_FDATASYNC
2e3bd4c2 43#define FIO_HAVE_FS_STAT
a5f3027c 44#define FIO_HAVE_TRIM
79a43187 45#define FIO_HAVE_BINJECT
ecc314ba 46#define FIO_HAVE_CLOCK_MONOTONIC
47f767c1 47#define FIO_HAVE_GETTID
b6959b55 48
804bb9a1
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49/*
50 * Can only enable this for newer glibcs, or the header and defines are
51 * missing
52 */
53#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 6
54#define FIO_HAVE_LINUX_FALLOCATE
55#endif
56
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57#ifdef SYNC_FILE_RANGE_WAIT_BEFORE
58#define FIO_HAVE_SYNC_FILE_RANGE
59#endif
60
dc873b6f 61#define OS_MAP_ANON MAP_ANONYMOUS
ebac4655 62
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63#ifndef CLOCK_MONOTONIC
64#define CLOCK_MONOTONIC 1
65#endif
66
ebac4655 67typedef cpu_set_t os_cpu_mask_t;
4e78e405 68
6dfd46b9 69typedef struct drand48_data os_random_state_t;
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70
71/*
72 * we want fadvise64 really, but it's so tangled... later
73 */
4d8947de 74#ifdef FIO_HAVE_FADVISE
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75#define fadvise(fd, off, len, advice) \
76 posix_fadvise((fd), (off_t)(off), (len), (advice))
4d8947de 77#endif
ebac4655 78
c8f025f8
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79/*
80 * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want
81 * the affinity helpers to work.
82 */
83#ifndef GLIBC_2_3_2
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84#define fio_setaffinity(pid, cpumask) \
85 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
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86#define fio_getaffinity(pid, ptr) \
87 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
c8f025f8 88#else
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89#define fio_setaffinity(pid, cpumask) \
90 sched_setaffinity((pid), &(cpumask))
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91#define fio_getaffinity(pid, ptr) \
92 sched_getaffinity((pid), (ptr))
93#endif
be4ecfdf 94
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95#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
96#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
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97
98static inline int fio_cpuset_init(os_cpu_mask_t *mask)
99{
100 CPU_ZERO(mask);
101 return 0;
102}
103
104static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
105{
106 return 0;
107}
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108
109#define FIO_MAX_CPUS CPU_SETSIZE
4d8947de 110
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111static inline int ioprio_set(int which, int who, int ioprio)
112{
113 return syscall(__NR_ioprio_set, which, who, ioprio);
114}
115
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116static inline int gettid(void)
117{
118 return syscall(__NR_gettid);
119}
120
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121/*
122 * Just check for SPLICE_F_MOVE, if that isn't there, assume the others
123 * aren't either.
124 */
125#ifndef SPLICE_F_MOVE
126#define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
127#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
128 /* we may still block on the fd we splice */
129 /* from/to, of course */
130#define SPLICE_F_MORE (0x04) /* expect more data */
131#define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
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132
133static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
495ee9b6 134 size_t len, unsigned int flags)
8756e4d4 135{
97fbdfa1 136 return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
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137}
138
139static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
140{
97fbdfa1 141 return syscall(__NR_sys_tee, fdin, fdout, len, flags);
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142}
143
144static inline int vmsplice(int fd, const struct iovec *iov,
145 unsigned long nr_segs, unsigned int flags)
146{
97fbdfa1 147 return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
8756e4d4 148}
97fbdfa1 149#endif
8756e4d4 150
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151#define SPLICE_DEF_SIZE (64*1024)
152
b6959b55 153#ifdef FIO_HAVE_SYSLET
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154
155struct syslet_uatom;
156struct async_head_user;
157
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158/*
159 * syslet stuff
160 */
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161static inline struct syslet_uatom *
162async_exec(struct syslet_uatom *atom, struct async_head_user *ahu)
a4f4fdd7 163{
2b52511f 164 return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu);
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165}
166
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167static inline long
168async_wait(unsigned long min_wait_events, unsigned long user_ring_idx,
169 struct async_head_user *ahu)
a4f4fdd7 170{
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171 return syscall(__NR_async_wait, min_wait_events,
172 user_ring_idx, ahu);
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173}
174
7756b0d0 175static inline long async_thread(void *event, struct async_head_user *ahu)
a4f4fdd7 176{
7756b0d0 177 return syscall(__NR_async_thread, event, ahu);
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178}
179
180static inline long umem_add(unsigned long *uptr, unsigned long inc)
181{
182 return syscall(__NR_umem_add, uptr, inc);
183}
b6959b55 184#endif /* FIO_HAVE_SYSLET */
a4f4fdd7 185
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186enum {
187 IOPRIO_CLASS_NONE,
188 IOPRIO_CLASS_RT,
189 IOPRIO_CLASS_BE,
190 IOPRIO_CLASS_IDLE,
191};
192
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193enum {
194 IOPRIO_WHO_PROCESS = 1,
195 IOPRIO_WHO_PGRP,
196 IOPRIO_WHO_USER,
197};
198
6cefbe33 199#define IOPRIO_BITS 16
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200#define IOPRIO_CLASS_SHIFT 13
201
202#ifndef BLKGETSIZE64
203#define BLKGETSIZE64 _IOR(0x12,114,size_t)
204#endif
205
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206#ifndef BLKFLSBUF
207#define BLKFLSBUF _IO(0x12,97)
208#endif
209
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210#ifndef BLKDISCARD
211#define BLKDISCARD _IO(0x12,119)
212#endif
213
e2e58886 214static inline int blockdev_invalidate_cache(struct fio_file *f)
e5b401d4 215{
ecc314ba 216 return ioctl(f->fd, BLKFLSBUF);
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217}
218
ecc314ba 219static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
ebac4655 220{
ecc314ba 221 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
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222 return 0;
223
224 return errno;
225}
226
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227static inline unsigned long long os_phys_mem(void)
228{
229 long pagesize, pages;
230
231 pagesize = sysconf(_SC_PAGESIZE);
232 pages = sysconf(_SC_PHYS_PAGES);
233 if (pages == -1 || pagesize == -1)
234 return 0;
235
236 return (unsigned long long) pages * (unsigned long long) pagesize;
237}
238
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239static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
240{
241 srand48_r(seed, rs);
242}
243
244static inline long os_random_long(os_random_state_t *rs)
245{
246 long val;
247
248 lrand48_r(rs, &val);
249 return val;
250}
251
8cc7afa9 252static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
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253{
254 struct raw_config_request rq;
255 int fd;
256
257 if (major(dev) != RAW_MAJOR)
8cc7afa9 258 return 1;
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259
260 /*
261 * we should be able to find /dev/rawctl or /dev/raw/rawctl
262 */
263 fd = open("/dev/rawctl", O_RDONLY);
264 if (fd < 0) {
265 fd = open("/dev/raw/rawctl", O_RDONLY);
266 if (fd < 0)
8cc7afa9 267 return 1;
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268 }
269
270 rq.raw_minor = minor(dev);
271 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
272 close(fd);
8cc7afa9 273 return 1;
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274 }
275
276 close(fd);
277 *majdev = rq.block_major;
278 *mindev = rq.block_minor;
8cc7afa9 279 return 0;
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280}
281
5b6f5c66 282#ifdef O_NOATIME
5921e80c 283#define FIO_O_NOATIME O_NOATIME
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284#else
285#define FIO_O_NOATIME 0
286#endif
5921e80c 287
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288#ifdef MADV_REMOVE
289#define FIO_MADV_FREE MADV_REMOVE
290#endif
291
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292#if __BYTE_ORDER == __LITTLE_ENDIAN
293#define FIO_LITTLE_ENDIAN
294#elif __BYTE_ORDER == __BIG_ENDIAN
295#define FIO_BIG_ENDIAN
296#else
297#error "Unknown endianness"
298#endif
299
ff245192
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300#define fio_swap16(x) __bswap_16(x)
301#define fio_swap32(x) __bswap_32(x)
302#define fio_swap64(x) __bswap_64(x)
303
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304#define CACHE_LINE_FILE \
305 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
306
307static inline int arch_cache_line_size(void)
308{
309 char size[32];
310 int fd, ret;
311
312 fd = open(CACHE_LINE_FILE, O_RDONLY);
313 if (fd < 0)
314 return -1;
315
316 ret = read(fd, size, sizeof(size));
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317
318 close(fd);
319
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320 if (ret <= 0)
321 return -1;
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322 else
323 return atoi(size);
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324}
325
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326static inline unsigned long long get_fs_size(const char *path)
327{
328 unsigned long long ret;
329 struct statfs s;
330
331 if (statfs(path, &s) < 0)
332 return -1ULL;
333
334 ret = s.f_bsize;
335 ret *= (unsigned long long) s.f_bfree;
336 return ret;
337}
338
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339static inline int os_trim(int fd, unsigned long long start,
340 unsigned long long len)
341{
342 uint64_t range[2];
343
344 range[0] = start;
345 range[1] = len;
346
347 if (!ioctl(fd, BLKDISCARD, range))
348 return 0;
349
350 return errno;
351}
352
ebac4655 353#endif