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[fio.git] / os / os-linux.h
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1#ifndef FIO_OS_LINUX_H
2#define FIO_OS_LINUX_H
3
4#define FIO_OS os_linux
5
6#include <sys/ioctl.h>
7#include <sys/uio.h>
8#include <sys/syscall.h>
9#include <sys/sysmacros.h>
10#include <sys/vfs.h>
11#include <sys/mman.h>
12#include <unistd.h>
13#include <fcntl.h>
14#include <errno.h>
15#include <sched.h>
16#include <linux/unistd.h>
17#include <linux/major.h>
18#include <linux/fs.h>
19#include <scsi/sg.h>
20
21#ifdef ARCH_HAVE_CRC_CRYPTO
22#include <sys/auxv.h>
23#ifndef HWCAP_CRC32
24#define HWCAP_CRC32 (1 << 7)
25#endif /* HWCAP_CRC32 */
26#endif /* ARCH_HAVE_CRC_CRYPTO */
27
28#include "./os-linux-syscall.h"
29#include "../file.h"
30
31#ifndef __has_builtin // Optional of course.
32 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
33#endif
34
35#define FIO_HAVE_CPU_AFFINITY
36#define FIO_HAVE_DISK_UTIL
37#define FIO_HAVE_SGIO
38#define FIO_HAVE_IOPRIO
39#define FIO_HAVE_IOPRIO_CLASS
40#define FIO_HAVE_IOSCHED_SWITCH
41#define FIO_HAVE_ODIRECT
42#define FIO_HAVE_HUGETLB
43#define FIO_HAVE_BLKTRACE
44#define FIO_HAVE_CL_SIZE
45#define FIO_HAVE_CGROUPS
46#define FIO_HAVE_FS_STAT
47#define FIO_HAVE_TRIM
48#define FIO_HAVE_GETTID
49#define FIO_USE_GENERIC_INIT_RANDOM_STATE
50#define FIO_HAVE_PWRITEV2
51#define FIO_HAVE_SHM_ATTACH_REMOVED
52
53#ifdef MAP_HUGETLB
54#define FIO_HAVE_MMAP_HUGE
55#endif
56
57#define OS_MAP_ANON MAP_ANONYMOUS
58
59#define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
60
61typedef cpu_set_t os_cpu_mask_t;
62
63#ifdef CONFIG_3ARG_AFFINITY
64#define fio_setaffinity(pid, cpumask) \
65 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
66#define fio_getaffinity(pid, ptr) \
67 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
68#elif defined(CONFIG_2ARG_AFFINITY)
69#define fio_setaffinity(pid, cpumask) \
70 sched_setaffinity((pid), &(cpumask))
71#define fio_getaffinity(pid, ptr) \
72 sched_getaffinity((pid), (ptr))
73#endif
74
75#ifdef CONFIG_PTHREAD_GETAFFINITY
76#define FIO_HAVE_GET_THREAD_AFFINITY
77#define fio_get_thread_affinity(mask) \
78 pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
79#endif
80
81#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
82#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
83#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
84#define fio_cpu_count(mask) CPU_COUNT((mask))
85
86static inline int fio_cpuset_init(os_cpu_mask_t *mask)
87{
88 CPU_ZERO(mask);
89 return 0;
90}
91
92static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
93{
94 return 0;
95}
96
97#define FIO_MAX_CPUS CPU_SETSIZE
98
99enum {
100 IOPRIO_CLASS_NONE,
101 IOPRIO_CLASS_RT,
102 IOPRIO_CLASS_BE,
103 IOPRIO_CLASS_IDLE,
104};
105
106enum {
107 IOPRIO_WHO_PROCESS = 1,
108 IOPRIO_WHO_PGRP,
109 IOPRIO_WHO_USER,
110};
111
112#define IOPRIO_BITS 16
113#define IOPRIO_CLASS_SHIFT 13
114
115#define IOPRIO_MIN_PRIO 0 /* highest priority */
116#define IOPRIO_MAX_PRIO 7 /* lowest priority */
117
118#define IOPRIO_MIN_PRIO_CLASS 0
119#define IOPRIO_MAX_PRIO_CLASS 3
120
121static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
122{
123 /*
124 * If no class is set, assume BE
125 */
126 if (!ioprio_class)
127 ioprio_class = IOPRIO_CLASS_BE;
128
129 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
130 return syscall(__NR_ioprio_set, which, who, ioprio);
131}
132
133#ifndef CONFIG_HAVE_GETTID
134static inline int gettid(void)
135{
136 return syscall(__NR_gettid);
137}
138#endif
139
140#define SPLICE_DEF_SIZE (64*1024)
141
142#ifndef BLKGETSIZE64
143#define BLKGETSIZE64 _IOR(0x12,114,size_t)
144#endif
145
146#ifndef BLKFLSBUF
147#define BLKFLSBUF _IO(0x12,97)
148#endif
149
150#ifndef BLKDISCARD
151#define BLKDISCARD _IO(0x12,119)
152#endif
153
154static inline int blockdev_invalidate_cache(struct fio_file *f)
155{
156 return ioctl(f->fd, BLKFLSBUF);
157}
158
159static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
160{
161 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
162 return 0;
163
164 return errno;
165}
166
167static inline unsigned long long os_phys_mem(void)
168{
169 long pagesize, pages;
170
171 pagesize = sysconf(_SC_PAGESIZE);
172 pages = sysconf(_SC_PHYS_PAGES);
173 if (pages == -1 || pagesize == -1)
174 return 0;
175
176 return (unsigned long long) pages * (unsigned long long) pagesize;
177}
178
179#ifdef O_NOATIME
180#define FIO_O_NOATIME O_NOATIME
181#else
182#define FIO_O_NOATIME 0
183#endif
184
185#ifdef O_ATOMIC
186#define OS_O_ATOMIC O_ATOMIC
187#else
188#define OS_O_ATOMIC 040000000
189#endif
190
191#ifdef MADV_REMOVE
192#define FIO_MADV_FREE MADV_REMOVE
193#endif
194
195/* Check for GCC or Clang byte swap intrinsics */
196#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
197 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
198 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
199#define fio_swap16(x) __builtin_bswap16(x)
200#define fio_swap32(x) __builtin_bswap32(x)
201#define fio_swap64(x) __builtin_bswap64(x)
202#else
203#include <byteswap.h>
204#define fio_swap16(x) bswap_16(x)
205#define fio_swap32(x) bswap_32(x)
206#define fio_swap64(x) bswap_64(x)
207#endif /* fio_swapN */
208
209#define CACHE_LINE_FILE \
210 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
211
212static inline int arch_cache_line_size(void)
213{
214 char size[32];
215 int fd, ret;
216
217 fd = open(CACHE_LINE_FILE, O_RDONLY);
218 if (fd < 0)
219 return -1;
220
221 ret = read(fd, size, sizeof(size));
222
223 close(fd);
224
225 if (ret <= 0)
226 return -1;
227 else
228 return atoi(size);
229}
230
231#ifdef __powerpc64__
232#define FIO_HAVE_CPU_ONLINE_SYSCONF
233static inline unsigned int cpus_online(void)
234{
235 return sysconf(_SC_NPROCESSORS_CONF);
236}
237#endif
238
239static inline unsigned long long get_fs_free_size(const char *path)
240{
241 unsigned long long ret;
242 struct statfs s;
243
244 if (statfs(path, &s) < 0)
245 return -1ULL;
246
247 ret = s.f_bsize;
248 ret *= (unsigned long long) s.f_bfree;
249 return ret;
250}
251
252static inline int os_trim(struct fio_file *f, unsigned long long start,
253 unsigned long long len)
254{
255 uint64_t range[2];
256
257 range[0] = start;
258 range[1] = len;
259
260 if (!ioctl(f->fd, BLKDISCARD, range))
261 return 0;
262
263 return errno;
264}
265
266#ifdef CONFIG_SCHED_IDLE
267static inline int fio_set_sched_idle(void)
268{
269 struct sched_param p = { .sched_priority = 0, };
270 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
271}
272#endif
273
274#ifndef F_GET_RW_HINT
275#ifndef F_LINUX_SPECIFIC_BASE
276#define F_LINUX_SPECIFIC_BASE 1024
277#endif
278#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
279#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
280#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
281#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
282#endif
283
284#ifndef RWH_WRITE_LIFE_NONE
285#define RWH_WRITE_LIFE_NOT_SET 0
286#define RWH_WRITE_LIFE_NONE 1
287#define RWH_WRITE_LIFE_SHORT 2
288#define RWH_WRITE_LIFE_MEDIUM 3
289#define RWH_WRITE_LIFE_LONG 4
290#define RWH_WRITE_LIFE_EXTREME 5
291#endif
292
293#define FIO_HAVE_WRITE_HINT
294
295#ifndef RWF_HIPRI
296#define RWF_HIPRI 0x00000001
297#endif
298#ifndef RWF_DSYNC
299#define RWF_DSYNC 0x00000002
300#endif
301#ifndef RWF_SYNC
302#define RWF_SYNC 0x00000004
303#endif
304#ifndef RWF_NOWAIT
305#define RWF_NOWAIT 0x00000008
306#endif
307
308#ifndef RWF_UNCACHED
309#define RWF_UNCACHED 0x00000040
310#endif
311
312#ifndef RWF_WRITE_LIFE_SHIFT
313#define RWF_WRITE_LIFE_SHIFT 4
314#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
315#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
316#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
317#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
318#endif
319
320#ifndef CONFIG_PWRITEV2
321#ifdef __NR_preadv2
322static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
323 off_t offset)
324{
325#if BITS_PER_LONG == 64
326 *pos_l = offset;
327 *pos_h = 0;
328#else
329 *pos_l = offset & 0xffffffff;
330 *pos_h = ((uint64_t) offset) >> 32;
331#endif
332}
333static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
334 off_t offset, unsigned int flags)
335{
336 unsigned long pos_l, pos_h;
337
338 make_pos_h_l(&pos_h, &pos_l, offset);
339 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
340}
341static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
342 off_t offset, unsigned int flags)
343{
344 unsigned long pos_l, pos_h;
345
346 make_pos_h_l(&pos_h, &pos_l, offset);
347 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
348}
349#else
350static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
351 off_t offset, unsigned int flags)
352{
353 errno = ENOSYS;
354 return -1;
355}
356static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
357 off_t offset, unsigned int flags)
358{
359 errno = ENOSYS;
360 return -1;
361}
362#endif /* __NR_preadv2 */
363#endif /* CONFIG_PWRITEV2 */
364
365static inline int shm_attach_to_open_removed(void)
366{
367 return 1;
368}
369
370#ifdef CONFIG_LINUX_FALLOCATE
371#define FIO_HAVE_NATIVE_FALLOCATE
372static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
373 uint64_t len)
374{
375 int ret;
376 ret = fallocate(f->fd, 0, offset, len);
377 if (ret == 0)
378 return true;
379
380 /* Work around buggy old glibc versions... */
381 if (ret > 0)
382 errno = ret;
383
384 return false;
385}
386#endif
387
388#define FIO_HAVE_CPU_HAS
389static inline bool os_cpu_has(cpu_features feature)
390{
391 bool have_feature;
392 unsigned long fio_unused hwcap;
393
394 switch (feature) {
395#ifdef ARCH_HAVE_CRC_CRYPTO
396 case CPU_ARM64_CRC32C:
397 hwcap = getauxval(AT_HWCAP);
398 have_feature = (hwcap & HWCAP_CRC32) != 0;
399 break;
400#endif
401 default:
402 have_feature = false;
403 }
404
405 return have_feature;
406}
407
408#endif
fio - Flexible IO Tester