[fio.git] / os / os-linux.h

#ifndef FIO_OS_LINUX_H
#define FIO_OS_LINUX_H

#ifdef __ANDROID__
#define FIO_OS  os_android
#else
#define	FIO_OS	os_linux
#endif

#include <sys/ioctl.h>
#include <sys/uio.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <sys/vfs.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sched.h>
#include <linux/unistd.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <scsi/sg.h>
#include <asm/byteorder.h>
#ifdef __ANDROID__
#include "os-ashmem.h"
#define FIO_NO_HAVE_SHM_H
#endif

#ifdef ARCH_HAVE_CRC_CRYPTO
#include <sys/auxv.h>
#ifndef HWCAP_PMULL
#define HWCAP_PMULL             (1 << 4)
#endif /* HWCAP_PMULL */
#ifndef HWCAP_CRC32
#define HWCAP_CRC32             (1 << 7)
#endif /* HWCAP_CRC32 */
#endif /* ARCH_HAVE_CRC_CRYPTO */

#include "./os-linux-syscall.h"
#include "../file.h"

#ifndef __has_builtin         // Optional of course.
  #define __has_builtin(x) 0  // Compatibility with non-clang compilers.
#endif

#define FIO_HAVE_CPU_AFFINITY
#define FIO_HAVE_DISK_UTIL
#define FIO_HAVE_SGIO
#define FIO_HAVE_IOPRIO
#define FIO_HAVE_IOPRIO_CLASS
#define FIO_HAVE_IOSCHED_SWITCH
#define FIO_HAVE_ODIRECT
#define FIO_HAVE_HUGETLB
#define FIO_HAVE_BLKTRACE
#define FIO_HAVE_CL_SIZE
#define FIO_HAVE_CGROUPS
#define FIO_HAVE_FS_STAT
#define FIO_HAVE_TRIM
#define FIO_HAVE_GETTID
#define FIO_USE_GENERIC_INIT_RANDOM_STATE
#define FIO_HAVE_BYTEORDER_FUNCS
#define FIO_HAVE_PWRITEV2
#define FIO_HAVE_SHM_ATTACH_REMOVED

#ifdef MAP_HUGETLB
#define FIO_HAVE_MMAP_HUGE
#endif

#define OS_MAP_ANON		MAP_ANONYMOUS

#define FIO_EXT_ENG_DIR	"/usr/local/lib/fio"

typedef cpu_set_t os_cpu_mask_t;

#ifdef CONFIG_3ARG_AFFINITY
#define fio_setaffinity(pid, cpumask)		\
	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
#define fio_getaffinity(pid, ptr)	\
	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
#elif defined(CONFIG_2ARG_AFFINITY)
#define fio_setaffinity(pid, cpumask)	\
	sched_setaffinity((pid), &(cpumask))
#define fio_getaffinity(pid, ptr)	\
	sched_getaffinity((pid), (ptr))
#endif

#ifdef CONFIG_PTHREAD_GETAFFINITY
#define FIO_HAVE_GET_THREAD_AFFINITY
#define fio_get_thread_affinity(mask)	\
	pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
#endif

#define fio_cpu_clear(mask, cpu)	CPU_CLR((cpu), (mask))
#define fio_cpu_set(mask, cpu)		CPU_SET((cpu), (mask))
#define fio_cpu_isset(mask, cpu)	(CPU_ISSET((cpu), (mask)) != 0)
#define fio_cpu_count(mask)		CPU_COUNT((mask))

static inline int fio_cpuset_init(os_cpu_mask_t *mask)
{
	CPU_ZERO(mask);
	return 0;
}

static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
{
	return 0;
}

#define FIO_MAX_CPUS			CPU_SETSIZE

enum {
	IOPRIO_CLASS_NONE,
	IOPRIO_CLASS_RT,
	IOPRIO_CLASS_BE,
	IOPRIO_CLASS_IDLE,
};

enum {
	IOPRIO_WHO_PROCESS = 1,
	IOPRIO_WHO_PGRP,
	IOPRIO_WHO_USER,
};

#define IOPRIO_BITS		16
#define IOPRIO_CLASS_SHIFT	13

#define IOPRIO_MIN_PRIO		0	/* highest priority */
#define IOPRIO_MAX_PRIO		7	/* lowest priority */

#define IOPRIO_MIN_PRIO_CLASS	0
#define IOPRIO_MAX_PRIO_CLASS	3

static inline int ioprio_value(int ioprio_class, int ioprio)
{
	/*
	 * If no class is set, assume BE
	 */
        if (!ioprio_class)
                ioprio_class = IOPRIO_CLASS_BE;

	return (ioprio_class << IOPRIO_CLASS_SHIFT) | ioprio;
}

static inline bool ioprio_value_is_class_rt(unsigned int priority)
{
	return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
}

static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
{
	return syscall(__NR_ioprio_set, which, who,
		       ioprio_value(ioprio_class, ioprio));
}

#ifndef CONFIG_HAVE_GETTID
static inline int gettid(void)
{
	return syscall(__NR_gettid);
}
#endif

#define SPLICE_DEF_SIZE	(64*1024)

#ifndef BLKGETSIZE64
#define BLKGETSIZE64	_IOR(0x12,114,size_t)
#endif

#ifndef BLKFLSBUF
#define BLKFLSBUF	_IO(0x12,97)
#endif

#ifndef BLKDISCARD
#define BLKDISCARD	_IO(0x12,119)
#endif

static inline int blockdev_invalidate_cache(struct fio_file *f)
{
	return ioctl(f->fd, BLKFLSBUF);
}

static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
{
	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
		return 0;

	return errno;
}

static inline unsigned long long os_phys_mem(void)
{
	long pagesize, pages;

	pagesize = sysconf(_SC_PAGESIZE);
	pages = sysconf(_SC_PHYS_PAGES);
	if (pages == -1 || pagesize == -1)
		return 0;

	return (unsigned long long) pages * (unsigned long long) pagesize;
}

#ifdef O_NOATIME
#define FIO_O_NOATIME	O_NOATIME
#else
#define FIO_O_NOATIME	0
#endif

#ifdef MADV_REMOVE
#define FIO_MADV_FREE	MADV_REMOVE
#endif

/* Check for GCC or Clang byte swap intrinsics */
#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
     && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
     || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
#define fio_swap16(x)	__builtin_bswap16(x)
#define fio_swap32(x)	__builtin_bswap32(x)
#define fio_swap64(x)	__builtin_bswap64(x)
#else
#include <byteswap.h>
#define fio_swap16(x)	bswap_16(x)
#define fio_swap32(x)	bswap_32(x)
#define fio_swap64(x)	bswap_64(x)
#endif /* fio_swapN */

#define CACHE_LINE_FILE	\
	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"

static inline int arch_cache_line_size(void)
{
	char size[32];
	int fd, ret;

	fd = open(CACHE_LINE_FILE, O_RDONLY);
	if (fd < 0)
		return -1;

	ret = read(fd, size, sizeof(size));

	close(fd);

	if (ret <= 0)
		return -1;
	else
		return atoi(size);
}

static inline unsigned long long get_fs_free_size(const char *path)
{
	unsigned long long ret;
	struct statfs s;

	if (statfs(path, &s) < 0)
		return -1ULL;

	ret = s.f_bsize;
	ret *= (unsigned long long) s.f_bfree;
	return ret;
}

static inline int os_trim(struct fio_file *f, unsigned long long start,
			  unsigned long long len)
{
	uint64_t range[2];

	range[0] = start;
	range[1] = len;

	if (!ioctl(f->fd, BLKDISCARD, range))
		return 0;

	return errno;
}

#ifdef CONFIG_SCHED_IDLE
static inline int fio_set_sched_idle(void)
{
	struct sched_param p = { .sched_priority = 0, };
	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
}
#endif

#ifndef F_GET_RW_HINT
#ifndef F_LINUX_SPECIFIC_BASE
#define F_LINUX_SPECIFIC_BASE	1024
#endif
#define F_GET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 11)
#define F_SET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 12)
#define F_GET_FILE_RW_HINT	(F_LINUX_SPECIFIC_BASE + 13)
#define F_SET_FILE_RW_HINT	(F_LINUX_SPECIFIC_BASE + 14)
#endif

#ifndef RWH_WRITE_LIFE_NONE
#define RWH_WRITE_LIFE_NOT_SET	0
#define RWH_WRITE_LIFE_NONE	1
#define RWH_WRITE_LIFE_SHORT	2
#define RWH_WRITE_LIFE_MEDIUM	3
#define RWH_WRITE_LIFE_LONG	4
#define RWH_WRITE_LIFE_EXTREME	5
#endif

#define FIO_HAVE_WRITE_HINT

#ifndef RWF_HIPRI
#define RWF_HIPRI	0x00000001
#endif
#ifndef RWF_DSYNC
#define RWF_DSYNC	0x00000002
#endif
#ifndef RWF_SYNC
#define RWF_SYNC	0x00000004
#endif
#ifndef RWF_NOWAIT
#define RWF_NOWAIT	0x00000008
#endif

#ifndef RWF_UNCACHED
#define RWF_UNCACHED	0x00000040
#endif

#ifndef RWF_WRITE_LIFE_SHIFT
#define RWF_WRITE_LIFE_SHIFT		4
#define RWF_WRITE_LIFE_SHORT		(1 << RWF_WRITE_LIFE_SHIFT)
#define RWF_WRITE_LIFE_MEDIUM		(2 << RWF_WRITE_LIFE_SHIFT)
#define RWF_WRITE_LIFE_LONG		(3 << RWF_WRITE_LIFE_SHIFT)
#define RWF_WRITE_LIFE_EXTREME		(4 << RWF_WRITE_LIFE_SHIFT)
#endif

#ifndef CONFIG_PWRITEV2
#ifdef __NR_preadv2
static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
				off_t offset)
{
#if BITS_PER_LONG == 64
	*pos_l = offset;
	*pos_h = 0;
#else
	*pos_l = offset & 0xffffffff;
	*pos_h = ((uint64_t) offset) >> 32;
#endif
}
static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
			      off_t offset, unsigned int flags)
{
	unsigned long pos_l, pos_h;

	make_pos_h_l(&pos_h, &pos_l, offset);
	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
}
static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
			       off_t offset, unsigned int flags)
{
	unsigned long pos_l, pos_h;

	make_pos_h_l(&pos_h, &pos_l, offset);
	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
}
#else
static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
			      off_t offset, unsigned int flags)
{
	errno = ENOSYS;
	return -1;
}
static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
			       off_t offset, unsigned int flags)
{
	errno = ENOSYS;
	return -1;
}
#endif /* __NR_preadv2 */
#endif /* CONFIG_PWRITEV2 */

static inline int shm_attach_to_open_removed(void)
{
	return 1;
}

#ifdef CONFIG_LINUX_FALLOCATE
#define FIO_HAVE_NATIVE_FALLOCATE
static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
				 uint64_t len)
{
	int ret;
	ret = fallocate(f->fd, 0, offset, len);
	if (ret == 0)
		return true;

	/* Work around buggy old glibc versions... */
	if (ret > 0)
		errno = ret;

	return false;
}
#endif

#define FIO_HAVE_CPU_HAS
static inline bool os_cpu_has(cpu_features feature)
{
	bool have_feature;
	unsigned long fio_unused hwcap;

	switch (feature) {
#ifdef ARCH_HAVE_CRC_CRYPTO
	case CPU_ARM64_CRC32C:
		hwcap = getauxval(AT_HWCAP);
		have_feature = (hwcap & (HWCAP_PMULL | HWCAP_CRC32)) ==
			       (HWCAP_PMULL | HWCAP_CRC32);
		break;
#endif
	default:
		have_feature = false;
	}

	return have_feature;
}

#endif
Commit	Line	Data
	1	#ifndef FIO_OS_LINUX_H
	2	#define FIO_OS_LINUX_H
	3
	4	#ifdef __ANDROID__
	5	#define FIO_OS os_android
	6	#else
	7	#define FIO_OS os_linux
	8	#endif
	9
	10	#include <sys/ioctl.h>
	11	#include <sys/uio.h>
	12	#include <sys/syscall.h>
	13	#include <sys/sysmacros.h>
	14	#include <sys/vfs.h>
	15	#include <sys/mman.h>
	16	#include <unistd.h>
	17	#include <fcntl.h>
	18	#include <errno.h>
	19	#include <sched.h>
	20	#include <linux/unistd.h>
	21	#include <linux/major.h>
	22	#include <linux/fs.h>
	23	#include <scsi/sg.h>
	24	#include <asm/byteorder.h>
	25	#ifdef __ANDROID__
	26	#include "os-ashmem.h"
	27	#define FIO_NO_HAVE_SHM_H
	28	#endif
	29
	30	#ifdef ARCH_HAVE_CRC_CRYPTO
	31	#include <sys/auxv.h>
	32	#ifndef HWCAP_PMULL
	33	#define HWCAP_PMULL (1 << 4)
	34	#endif /* HWCAP_PMULL */
	35	#ifndef HWCAP_CRC32
	36	#define HWCAP_CRC32 (1 << 7)
	37	#endif /* HWCAP_CRC32 */
	38	#endif /* ARCH_HAVE_CRC_CRYPTO */
	39
	40	#include "./os-linux-syscall.h"
	41	#include "../file.h"
	42
	43	#ifndef __has_builtin // Optional of course.
	44	#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
	45	#endif
	46
	47	#define FIO_HAVE_CPU_AFFINITY
	48	#define FIO_HAVE_DISK_UTIL
	49	#define FIO_HAVE_SGIO
	50	#define FIO_HAVE_IOPRIO
	51	#define FIO_HAVE_IOPRIO_CLASS
	52	#define FIO_HAVE_IOSCHED_SWITCH
	53	#define FIO_HAVE_ODIRECT
	54	#define FIO_HAVE_HUGETLB
	55	#define FIO_HAVE_BLKTRACE
	56	#define FIO_HAVE_CL_SIZE
	57	#define FIO_HAVE_CGROUPS
	58	#define FIO_HAVE_FS_STAT
	59	#define FIO_HAVE_TRIM
	60	#define FIO_HAVE_GETTID
	61	#define FIO_USE_GENERIC_INIT_RANDOM_STATE
	62	#define FIO_HAVE_BYTEORDER_FUNCS
	63	#define FIO_HAVE_PWRITEV2
	64	#define FIO_HAVE_SHM_ATTACH_REMOVED
	65
	66	#ifdef MAP_HUGETLB
	67	#define FIO_HAVE_MMAP_HUGE
	68	#endif
	69
	70	#define OS_MAP_ANON MAP_ANONYMOUS
	71
	72	#define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
	73
	74	typedef cpu_set_t os_cpu_mask_t;
	75
	76	#ifdef CONFIG_3ARG_AFFINITY
	77	#define fio_setaffinity(pid, cpumask) \
	78	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
	79	#define fio_getaffinity(pid, ptr) \
	80	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
	81	#elif defined(CONFIG_2ARG_AFFINITY)
	82	#define fio_setaffinity(pid, cpumask) \
	83	sched_setaffinity((pid), &(cpumask))
	84	#define fio_getaffinity(pid, ptr) \
	85	sched_getaffinity((pid), (ptr))
	86	#endif
	87
	88	#ifdef CONFIG_PTHREAD_GETAFFINITY
	89	#define FIO_HAVE_GET_THREAD_AFFINITY
	90	#define fio_get_thread_affinity(mask) \
	91	pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
	92	#endif
	93
	94	#define fio_cpu_clear(mask, cpu) CPU_CLR((cpu), (mask))
	95	#define fio_cpu_set(mask, cpu) CPU_SET((cpu), (mask))
	96	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
	97	#define fio_cpu_count(mask) CPU_COUNT((mask))
	98
	99	static inline int fio_cpuset_init(os_cpu_mask_t *mask)
	100	{
	101	CPU_ZERO(mask);
	102	return 0;
	103	}
	104
	105	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	106	{
	107	return 0;
	108	}
	109
	110	#define FIO_MAX_CPUS CPU_SETSIZE
	111
	112	enum {
	113	IOPRIO_CLASS_NONE,
	114	IOPRIO_CLASS_RT,
	115	IOPRIO_CLASS_BE,
	116	IOPRIO_CLASS_IDLE,
	117	};
	118
	119	enum {
	120	IOPRIO_WHO_PROCESS = 1,
	121	IOPRIO_WHO_PGRP,
	122	IOPRIO_WHO_USER,
	123	};
	124
	125	#define IOPRIO_BITS 16
	126	#define IOPRIO_CLASS_SHIFT 13
	127
	128	#define IOPRIO_MIN_PRIO 0 /* highest priority */
	129	#define IOPRIO_MAX_PRIO 7 /* lowest priority */
	130
	131	#define IOPRIO_MIN_PRIO_CLASS 0
	132	#define IOPRIO_MAX_PRIO_CLASS 3
	133
	134	static inline int ioprio_value(int ioprio_class, int ioprio)
	135	{
	136	/*
	137	* If no class is set, assume BE
	138	*/
	139	if (!ioprio_class)
	140	ioprio_class = IOPRIO_CLASS_BE;
	141
	142	return (ioprio_class << IOPRIO_CLASS_SHIFT) \| ioprio;
	143	}
	144
	145	static inline bool ioprio_value_is_class_rt(unsigned int priority)
	146	{
	147	return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
	148	}
	149
	150	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	151	{
	152	return syscall(__NR_ioprio_set, which, who,
	153	ioprio_value(ioprio_class, ioprio));
	154	}
	155
	156	#ifndef CONFIG_HAVE_GETTID
	157	static inline int gettid(void)
	158	{
	159	return syscall(__NR_gettid);
	160	}
	161	#endif
	162
	163	#define SPLICE_DEF_SIZE (64*1024)
	164
	165	#ifndef BLKGETSIZE64
	166	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	167	#endif
	168
	169	#ifndef BLKFLSBUF
	170	#define BLKFLSBUF _IO(0x12,97)
	171	#endif
	172
	173	#ifndef BLKDISCARD
	174	#define BLKDISCARD _IO(0x12,119)
	175	#endif
	176
	177	static inline int blockdev_invalidate_cache(struct fio_file *f)
	178	{
	179	return ioctl(f->fd, BLKFLSBUF);
	180	}
	181
	182	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
	183	{
	184	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
	185	return 0;
	186
	187	return errno;
	188	}
	189
	190	static inline unsigned long long os_phys_mem(void)
	191	{
	192	long pagesize, pages;
	193
	194	pagesize = sysconf(_SC_PAGESIZE);
	195	pages = sysconf(_SC_PHYS_PAGES);
	196	if (pages == -1 \|\| pagesize == -1)
	197	return 0;
	198
	199	return (unsigned long long) pages * (unsigned long long) pagesize;
	200	}
	201
	202	#ifdef O_NOATIME
	203	#define FIO_O_NOATIME O_NOATIME
	204	#else
	205	#define FIO_O_NOATIME 0
	206	#endif
	207
	208	#ifdef MADV_REMOVE
	209	#define FIO_MADV_FREE MADV_REMOVE
	210	#endif
	211
	212	/* Check for GCC or Clang byte swap intrinsics */
	213	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	214	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	215	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
	216	#define fio_swap16(x) __builtin_bswap16(x)
	217	#define fio_swap32(x) __builtin_bswap32(x)
	218	#define fio_swap64(x) __builtin_bswap64(x)
	219	#else
	220	#include <byteswap.h>
	221	#define fio_swap16(x) bswap_16(x)
	222	#define fio_swap32(x) bswap_32(x)
	223	#define fio_swap64(x) bswap_64(x)
	224	#endif /* fio_swapN */
	225
	226	#define CACHE_LINE_FILE \
	227	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	228
	229	static inline int arch_cache_line_size(void)
	230	{
	231	char size[32];
	232	int fd, ret;
	233
	234	fd = open(CACHE_LINE_FILE, O_RDONLY);
	235	if (fd < 0)
	236	return -1;
	237
	238	ret = read(fd, size, sizeof(size));
	239
	240	close(fd);
	241
	242	if (ret <= 0)
	243	return -1;
	244	else
	245	return atoi(size);
	246	}
	247
	248	static inline unsigned long long get_fs_free_size(const char *path)
	249	{
	250	unsigned long long ret;
	251	struct statfs s;
	252
	253	if (statfs(path, &s) < 0)
	254	return -1ULL;
	255
	256	ret = s.f_bsize;
	257	ret *= (unsigned long long) s.f_bfree;
	258	return ret;
	259	}
	260
	261	static inline int os_trim(struct fio_file *f, unsigned long long start,
	262	unsigned long long len)
	263	{
	264	uint64_t range[2];
	265
	266	range[0] = start;
	267	range[1] = len;
	268
	269	if (!ioctl(f->fd, BLKDISCARD, range))
	270	return 0;
	271
	272	return errno;
	273	}
	274
	275	#ifdef CONFIG_SCHED_IDLE
	276	static inline int fio_set_sched_idle(void)
	277	{
	278	struct sched_param p = { .sched_priority = 0, };
	279	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	280	}
	281	#endif
	282
	283	#ifndef F_GET_RW_HINT
	284	#ifndef F_LINUX_SPECIFIC_BASE
	285	#define F_LINUX_SPECIFIC_BASE 1024
	286	#endif
	287	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	288	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
	289	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
	290	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
	291	#endif
	292
	293	#ifndef RWH_WRITE_LIFE_NONE
	294	#define RWH_WRITE_LIFE_NOT_SET 0
	295	#define RWH_WRITE_LIFE_NONE 1
	296	#define RWH_WRITE_LIFE_SHORT 2
	297	#define RWH_WRITE_LIFE_MEDIUM 3
	298	#define RWH_WRITE_LIFE_LONG 4
	299	#define RWH_WRITE_LIFE_EXTREME 5
	300	#endif
	301
	302	#define FIO_HAVE_WRITE_HINT
	303
	304	#ifndef RWF_HIPRI
	305	#define RWF_HIPRI 0x00000001
	306	#endif
	307	#ifndef RWF_DSYNC
	308	#define RWF_DSYNC 0x00000002
	309	#endif
	310	#ifndef RWF_SYNC
	311	#define RWF_SYNC 0x00000004
	312	#endif
	313	#ifndef RWF_NOWAIT
	314	#define RWF_NOWAIT 0x00000008
	315	#endif
	316
	317	#ifndef RWF_UNCACHED
	318	#define RWF_UNCACHED 0x00000040
	319	#endif
	320
	321	#ifndef RWF_WRITE_LIFE_SHIFT
	322	#define RWF_WRITE_LIFE_SHIFT 4
	323	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	324	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	325	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	326	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	327	#endif
	328
	329	#ifndef CONFIG_PWRITEV2
	330	#ifdef __NR_preadv2
	331	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	332	off_t offset)
	333	{
	334	#if BITS_PER_LONG == 64
	335	*pos_l = offset;
	336	*pos_h = 0;
	337	#else
	338	*pos_l = offset & 0xffffffff;
	339	*pos_h = ((uint64_t) offset) >> 32;
	340	#endif
	341	}
	342	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	343	off_t offset, unsigned int flags)
	344	{
	345	unsigned long pos_l, pos_h;
	346
	347	make_pos_h_l(&pos_h, &pos_l, offset);
	348	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	349	}
	350	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	351	off_t offset, unsigned int flags)
	352	{
	353	unsigned long pos_l, pos_h;
	354
	355	make_pos_h_l(&pos_h, &pos_l, offset);
	356	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	357	}
	358	#else
	359	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	360	off_t offset, unsigned int flags)
	361	{
	362	errno = ENOSYS;
	363	return -1;
	364	}
	365	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	366	off_t offset, unsigned int flags)
	367	{
	368	errno = ENOSYS;
	369	return -1;
	370	}
	371	#endif /* __NR_preadv2 */
	372	#endif /* CONFIG_PWRITEV2 */
	373
	374	static inline int shm_attach_to_open_removed(void)
	375	{
	376	return 1;
	377	}
	378
	379	#ifdef CONFIG_LINUX_FALLOCATE
	380	#define FIO_HAVE_NATIVE_FALLOCATE
	381	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	382	uint64_t len)
	383	{
	384	int ret;
	385	ret = fallocate(f->fd, 0, offset, len);
	386	if (ret == 0)
	387	return true;
	388
	389	/* Work around buggy old glibc versions... */
	390	if (ret > 0)
	391	errno = ret;
	392
	393	return false;
	394	}
	395	#endif
	396
	397	#define FIO_HAVE_CPU_HAS
	398	static inline bool os_cpu_has(cpu_features feature)
	399	{
	400	bool have_feature;
	401	unsigned long fio_unused hwcap;
	402
	403	switch (feature) {
	404	#ifdef ARCH_HAVE_CRC_CRYPTO
	405	case CPU_ARM64_CRC32C:
	406	hwcap = getauxval(AT_HWCAP);
	407	have_feature = (hwcap & (HWCAP_PMULL \| HWCAP_CRC32)) ==
	408	(HWCAP_PMULL \| HWCAP_CRC32);
	409	break;
	410	#endif
	411	default:
	412	have_feature = false;
	413	}
	414
	415	return have_feature;
	416	}
	417
	418	#endif