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

#ifndef FIO_OS_LINUX_H
#define FIO_OS_LINUX_H

#define	FIO_OS	os_linux

#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/raw.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <scsi/sg.h>

#ifdef ARCH_HAVE_CRC_CRYPTO
#include <sys/auxv.h>
#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_RAWBIND
#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_PWRITEV2
#define FIO_HAVE_SHM_ATTACH_REMOVED

#ifdef MAP_HUGETLB
#define FIO_HAVE_MMAP_HUGE
#endif

#define OS_MAP_ANON		MAP_ANONYMOUS

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

#define fio_cpu_clear(mask, cpu)	(void) CPU_CLR((cpu), (mask))
#define fio_cpu_set(mask, cpu)		(void) 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_set(int which, int who, int ioprio_class, int ioprio)
{
	/*
	 * If no class is set, assume BE
	 */
	if (!ioprio_class)
		ioprio_class = IOPRIO_CLASS_BE;

	ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
	return syscall(__NR_ioprio_set, which, who, ioprio);
}

static inline int gettid(void)
{
	return syscall(__NR_gettid);
}

#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;
}

static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
{
	struct raw_config_request rq;
	int fd;

	if (major(dev) != RAW_MAJOR)
		return 1;

	/*
	 * we should be able to find /dev/rawctl or /dev/raw/rawctl
	 */
	fd = open("/dev/rawctl", O_RDONLY);
	if (fd < 0) {
		fd = open("/dev/raw/rawctl", O_RDONLY);
		if (fd < 0)
			return 1;
	}

	rq.raw_minor = minor(dev);
	if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
		close(fd);
		return 1;
	}

	close(fd);
	*majdev = rq.block_major;
	*mindev = rq.block_minor;
	return 0;
}

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

#ifdef O_ATOMIC
#define OS_O_ATOMIC	O_ATOMIC
#else
#define OS_O_ATOMIC	040000000
#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);
}

#ifdef __powerpc64__
#define FIO_HAVE_CPU_ONLINE_SYSCONF
static inline unsigned int cpus_online(void)
{
        return sysconf(_SC_NPROCESSORS_CONF);
}
#endif

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_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_CRC32) != 0;
		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	#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/raw.h>
	18	#include <linux/major.h>
	19	#include <linux/fs.h>
	20	#include <scsi/sg.h>
	21
	22	#ifdef ARCH_HAVE_CRC_CRYPTO
	23	#include <sys/auxv.h>
	24	#ifndef HWCAP_CRC32
	25	#define HWCAP_CRC32 (1 << 7)
	26	#endif /* HWCAP_CRC32 */
	27	#endif /* ARCH_HAVE_CRC_CRYPTO */
	28
	29	#include "./os-linux-syscall.h"
	30	#include "../file.h"
	31
	32	#ifndef __has_builtin // Optional of course.
	33	#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
	34	#endif
	35
	36	#define FIO_HAVE_CPU_AFFINITY
	37	#define FIO_HAVE_DISK_UTIL
	38	#define FIO_HAVE_SGIO
	39	#define FIO_HAVE_IOPRIO
	40	#define FIO_HAVE_IOPRIO_CLASS
	41	#define FIO_HAVE_IOSCHED_SWITCH
	42	#define FIO_HAVE_ODIRECT
	43	#define FIO_HAVE_HUGETLB
	44	#define FIO_HAVE_RAWBIND
	45	#define FIO_HAVE_BLKTRACE
	46	#define FIO_HAVE_CL_SIZE
	47	#define FIO_HAVE_CGROUPS
	48	#define FIO_HAVE_FS_STAT
	49	#define FIO_HAVE_TRIM
	50	#define FIO_HAVE_GETTID
	51	#define FIO_USE_GENERIC_INIT_RANDOM_STATE
	52	#define FIO_HAVE_PWRITEV2
	53	#define FIO_HAVE_SHM_ATTACH_REMOVED
	54
	55	#ifdef MAP_HUGETLB
	56	#define FIO_HAVE_MMAP_HUGE
	57	#endif
	58
	59	#define OS_MAP_ANON MAP_ANONYMOUS
	60
	61	typedef 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	#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
	76	#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
	77	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
	78	#define fio_cpu_count(mask) CPU_COUNT((mask))
	79
	80	static inline int fio_cpuset_init(os_cpu_mask_t *mask)
	81	{
	82	CPU_ZERO(mask);
	83	return 0;
	84	}
	85
	86	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	87	{
	88	return 0;
	89	}
	90
	91	#define FIO_MAX_CPUS CPU_SETSIZE
	92
	93	enum {
	94	IOPRIO_CLASS_NONE,
	95	IOPRIO_CLASS_RT,
	96	IOPRIO_CLASS_BE,
	97	IOPRIO_CLASS_IDLE,
	98	};
	99
	100	enum {
	101	IOPRIO_WHO_PROCESS = 1,
	102	IOPRIO_WHO_PGRP,
	103	IOPRIO_WHO_USER,
	104	};
	105
	106	#define IOPRIO_BITS 16
	107	#define IOPRIO_CLASS_SHIFT 13
	108
	109	#define IOPRIO_MIN_PRIO 0 /* highest priority */
	110	#define IOPRIO_MAX_PRIO 7 /* lowest priority */
	111
	112	#define IOPRIO_MIN_PRIO_CLASS 0
	113	#define IOPRIO_MAX_PRIO_CLASS 3
	114
	115	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	116	{
	117	/*
	118	* If no class is set, assume BE
	119	*/
	120	if (!ioprio_class)
	121	ioprio_class = IOPRIO_CLASS_BE;
	122
	123	ioprio \|= ioprio_class << IOPRIO_CLASS_SHIFT;
	124	return syscall(__NR_ioprio_set, which, who, ioprio);
	125	}
	126
	127	static inline int gettid(void)
	128	{
	129	return syscall(__NR_gettid);
	130	}
	131
	132	#define SPLICE_DEF_SIZE (64*1024)
	133
	134	#ifndef BLKGETSIZE64
	135	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	136	#endif
	137
	138	#ifndef BLKFLSBUF
	139	#define BLKFLSBUF _IO(0x12,97)
	140	#endif
	141
	142	#ifndef BLKDISCARD
	143	#define BLKDISCARD _IO(0x12,119)
	144	#endif
	145
	146	static inline int blockdev_invalidate_cache(struct fio_file *f)
	147	{
	148	return ioctl(f->fd, BLKFLSBUF);
	149	}
	150
	151	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
	152	{
	153	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
	154	return 0;
	155
	156	return errno;
	157	}
	158
	159	static inline unsigned long long os_phys_mem(void)
	160	{
	161	long pagesize, pages;
	162
	163	pagesize = sysconf(_SC_PAGESIZE);
	164	pages = sysconf(_SC_PHYS_PAGES);
	165	if (pages == -1 \|\| pagesize == -1)
	166	return 0;
	167
	168	return (unsigned long long) pages * (unsigned long long) pagesize;
	169	}
	170
	171	static inline int fio_lookup_raw(dev_t dev, int majdev, int mindev)
	172	{
	173	struct raw_config_request rq;
	174	int fd;
	175
	176	if (major(dev) != RAW_MAJOR)
	177	return 1;
	178
	179	/*
	180	* we should be able to find /dev/rawctl or /dev/raw/rawctl
	181	*/
	182	fd = open("/dev/rawctl", O_RDONLY);
	183	if (fd < 0) {
	184	fd = open("/dev/raw/rawctl", O_RDONLY);
	185	if (fd < 0)
	186	return 1;
	187	}
	188
	189	rq.raw_minor = minor(dev);
	190	if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
	191	close(fd);
	192	return 1;
	193	}
	194
	195	close(fd);
	196	*majdev = rq.block_major;
	197	*mindev = rq.block_minor;
	198	return 0;
	199	}
	200
	201	#ifdef O_NOATIME
	202	#define FIO_O_NOATIME O_NOATIME
	203	#else
	204	#define FIO_O_NOATIME 0
	205	#endif
	206
	207	#ifdef O_ATOMIC
	208	#define OS_O_ATOMIC O_ATOMIC
	209	#else
	210	#define OS_O_ATOMIC 040000000
	211	#endif
	212
	213	#ifdef MADV_REMOVE
	214	#define FIO_MADV_FREE MADV_REMOVE
	215	#endif
	216
	217	/* Check for GCC or Clang byte swap intrinsics */
	218	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	219	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	220	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
	221	#define fio_swap16(x) __builtin_bswap16(x)
	222	#define fio_swap32(x) __builtin_bswap32(x)
	223	#define fio_swap64(x) __builtin_bswap64(x)
	224	#else
	225	#include <byteswap.h>
	226	#define fio_swap16(x) bswap_16(x)
	227	#define fio_swap32(x) bswap_32(x)
	228	#define fio_swap64(x) bswap_64(x)
	229	#endif /* fio_swapN */
	230
	231	#define CACHE_LINE_FILE \
	232	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	233
	234	static inline int arch_cache_line_size(void)
	235	{
	236	char size[32];
	237	int fd, ret;
	238
	239	fd = open(CACHE_LINE_FILE, O_RDONLY);
	240	if (fd < 0)
	241	return -1;
	242
	243	ret = read(fd, size, sizeof(size));
	244
	245	close(fd);
	246
	247	if (ret <= 0)
	248	return -1;
	249	else
	250	return atoi(size);
	251	}
	252
	253	#ifdef __powerpc64__
	254	#define FIO_HAVE_CPU_ONLINE_SYSCONF
	255	static inline unsigned int cpus_online(void)
	256	{
	257	return sysconf(_SC_NPROCESSORS_CONF);
	258	}
	259	#endif
	260
	261	static inline unsigned long long get_fs_free_size(const char *path)
	262	{
	263	unsigned long long ret;
	264	struct statfs s;
	265
	266	if (statfs(path, &s) < 0)
	267	return -1ULL;
	268
	269	ret = s.f_bsize;
	270	ret *= (unsigned long long) s.f_bfree;
	271	return ret;
	272	}
	273
	274	static inline int os_trim(struct fio_file *f, unsigned long long start,
	275	unsigned long long len)
	276	{
	277	uint64_t range[2];
	278
	279	range[0] = start;
	280	range[1] = len;
	281
	282	if (!ioctl(f->fd, BLKDISCARD, range))
	283	return 0;
	284
	285	return errno;
	286	}
	287
	288	#ifdef CONFIG_SCHED_IDLE
	289	static inline int fio_set_sched_idle(void)
	290	{
	291	struct sched_param p = { .sched_priority = 0, };
	292	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	293	}
	294	#endif
	295
	296	#ifndef F_GET_RW_HINT
	297	#ifndef F_LINUX_SPECIFIC_BASE
	298	#define F_LINUX_SPECIFIC_BASE 1024
	299	#endif
	300	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	301	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
	302	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
	303	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
	304	#endif
	305
	306	#ifndef RWH_WRITE_LIFE_NONE
	307	#define RWH_WRITE_LIFE_NOT_SET 0
	308	#define RWH_WRITE_LIFE_NONE 1
	309	#define RWH_WRITE_LIFE_SHORT 2
	310	#define RWH_WRITE_LIFE_MEDIUM 3
	311	#define RWH_WRITE_LIFE_LONG 4
	312	#define RWH_WRITE_LIFE_EXTREME 5
	313	#endif
	314
	315	#define FIO_HAVE_WRITE_HINT
	316
	317	#ifndef RWF_HIPRI
	318	#define RWF_HIPRI 0x00000001
	319	#endif
	320	#ifndef RWF_DSYNC
	321	#define RWF_DSYNC 0x00000002
	322	#endif
	323	#ifndef RWF_SYNC
	324	#define RWF_SYNC 0x00000004
	325	#endif
	326
	327	#ifndef RWF_WRITE_LIFE_SHIFT
	328	#define RWF_WRITE_LIFE_SHIFT 4
	329	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	330	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	331	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	332	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	333	#endif
	334
	335	#ifndef CONFIG_PWRITEV2
	336	#ifdef __NR_preadv2
	337	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	338	off_t offset)
	339	{
	340	#if BITS_PER_LONG == 64
	341	*pos_l = offset;
	342	*pos_h = 0;
	343	#else
	344	*pos_l = offset & 0xffffffff;
	345	*pos_h = ((uint64_t) offset) >> 32;
	346	#endif
	347	}
	348	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	349	off_t offset, unsigned int flags)
	350	{
	351	unsigned long pos_l, pos_h;
	352
	353	make_pos_h_l(&pos_h, &pos_l, offset);
	354	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	355	}
	356	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	357	off_t offset, unsigned int flags)
	358	{
	359	unsigned long pos_l, pos_h;
	360
	361	make_pos_h_l(&pos_h, &pos_l, offset);
	362	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	363	}
	364	#else
	365	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	366	off_t offset, unsigned int flags)
	367	{
	368	errno = ENOSYS;
	369	return -1;
	370	}
	371	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	372	off_t offset, unsigned int flags)
	373	{
	374	errno = ENOSYS;
	375	return -1;
	376	}
	377	#endif /* __NR_preadv2 */
	378	#endif /* CONFIG_PWRITEV2 */
	379
	380	static inline int shm_attach_to_open_removed(void)
	381	{
	382	return 1;
	383	}
	384
	385	#ifdef CONFIG_LINUX_FALLOCATE
	386	#define FIO_HAVE_NATIVE_FALLOCATE
	387	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	388	uint64_t len)
	389	{
	390	int ret;
	391	ret = fallocate(f->fd, 0, offset, len);
	392	if (ret == 0)
	393	return true;
	394
	395	/* Work around buggy old glibc versions... */
	396	if (ret > 0)
	397	errno = ret;
	398
	399	return false;
	400	}
	401	#endif
	402
	403	#define FIO_HAVE_CPU_HAS
	404	static inline bool os_cpu_has(cpu_features feature)
	405	{
	406	bool have_feature;
	407	unsigned long fio_unused hwcap;
	408
	409	switch (feature) {
	410	#ifdef ARCH_HAVE_CRC_CRYPTO
	411	case CPU_ARM64_CRC32C:
	412	hwcap = getauxval(AT_HWCAP);
	413	have_feature = (hwcap & HWCAP_CRC32) != 0;
	414	break;
	415	#endif
	416	default:
	417	have_feature = false;
	418	}
	419
	420	return have_feature;
	421	}
	422
	423	#endif