[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;

typedef struct drand48_data os_random_state_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 void os_random_seed(unsigned long seed, os_random_state_t *rs)
{
	srand48_r(seed, rs);
}

static inline long os_random_long(os_random_state_t *rs)
{
	long val;

	lrand48_r(rs, &val);
	return val;
}

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, 0, 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	typedef struct drand48_data os_random_state_t;
	64
	65	#ifdef CONFIG_3ARG_AFFINITY
	66	#define fio_setaffinity(pid, cpumask) \
	67	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
	68	#define fio_getaffinity(pid, ptr) \
	69	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
	70	#elif defined(CONFIG_2ARG_AFFINITY)
	71	#define fio_setaffinity(pid, cpumask) \
	72	sched_setaffinity((pid), &(cpumask))
	73	#define fio_getaffinity(pid, ptr) \
	74	sched_getaffinity((pid), (ptr))
	75	#endif
	76
	77	#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
	78	#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
	79	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
	80	#define fio_cpu_count(mask) CPU_COUNT((mask))
	81
	82	static inline int fio_cpuset_init(os_cpu_mask_t *mask)
	83	{
	84	CPU_ZERO(mask);
	85	return 0;
	86	}
	87
	88	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	89	{
	90	return 0;
	91	}
	92
	93	#define FIO_MAX_CPUS CPU_SETSIZE
	94
	95	enum {
	96	IOPRIO_CLASS_NONE,
	97	IOPRIO_CLASS_RT,
	98	IOPRIO_CLASS_BE,
	99	IOPRIO_CLASS_IDLE,
	100	};
	101
	102	enum {
	103	IOPRIO_WHO_PROCESS = 1,
	104	IOPRIO_WHO_PGRP,
	105	IOPRIO_WHO_USER,
	106	};
	107
	108	#define IOPRIO_BITS 16
	109	#define IOPRIO_CLASS_SHIFT 13
	110
	111	#define IOPRIO_MIN_PRIO 0 /* highest priority */
	112	#define IOPRIO_MAX_PRIO 7 /* lowest priority */
	113
	114	#define IOPRIO_MIN_PRIO_CLASS 0
	115	#define IOPRIO_MAX_PRIO_CLASS 3
	116
	117	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	118	{
	119	/*
	120	* If no class is set, assume BE
	121	*/
	122	if (!ioprio_class)
	123	ioprio_class = IOPRIO_CLASS_BE;
	124
	125	ioprio \|= ioprio_class << IOPRIO_CLASS_SHIFT;
	126	return syscall(__NR_ioprio_set, which, who, ioprio);
	127	}
	128
	129	static inline int gettid(void)
	130	{
	131	return syscall(__NR_gettid);
	132	}
	133
	134	#define SPLICE_DEF_SIZE (64*1024)
	135
	136	#ifndef BLKGETSIZE64
	137	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	138	#endif
	139
	140	#ifndef BLKFLSBUF
	141	#define BLKFLSBUF _IO(0x12,97)
	142	#endif
	143
	144	#ifndef BLKDISCARD
	145	#define BLKDISCARD _IO(0x12,119)
	146	#endif
	147
	148	static inline int blockdev_invalidate_cache(struct fio_file *f)
	149	{
	150	return ioctl(f->fd, BLKFLSBUF);
	151	}
	152
	153	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
	154	{
	155	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
	156	return 0;
	157
	158	return errno;
	159	}
	160
	161	static inline unsigned long long os_phys_mem(void)
	162	{
	163	long pagesize, pages;
	164
	165	pagesize = sysconf(_SC_PAGESIZE);
	166	pages = sysconf(_SC_PHYS_PAGES);
	167	if (pages == -1 \|\| pagesize == -1)
	168	return 0;
	169
	170	return (unsigned long long) pages * (unsigned long long) pagesize;
	171	}
	172
	173	static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
	174	{
	175	srand48_r(seed, rs);
	176	}
	177
	178	static inline long os_random_long(os_random_state_t *rs)
	179	{
	180	long val;
	181
	182	lrand48_r(rs, &val);
	183	return val;
	184	}
	185
	186	static inline int fio_lookup_raw(dev_t dev, int majdev, int mindev)
	187	{
	188	struct raw_config_request rq;
	189	int fd;
	190
	191	if (major(dev) != RAW_MAJOR)
	192	return 1;
	193
	194	/*
	195	* we should be able to find /dev/rawctl or /dev/raw/rawctl
	196	*/
	197	fd = open("/dev/rawctl", O_RDONLY);
	198	if (fd < 0) {
	199	fd = open("/dev/raw/rawctl", O_RDONLY);
	200	if (fd < 0)
	201	return 1;
	202	}
	203
	204	rq.raw_minor = minor(dev);
	205	if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
	206	close(fd);
	207	return 1;
	208	}
	209
	210	close(fd);
	211	*majdev = rq.block_major;
	212	*mindev = rq.block_minor;
	213	return 0;
	214	}
	215
	216	#ifdef O_NOATIME
	217	#define FIO_O_NOATIME O_NOATIME
	218	#else
	219	#define FIO_O_NOATIME 0
	220	#endif
	221
	222	#ifdef O_ATOMIC
	223	#define OS_O_ATOMIC O_ATOMIC
	224	#else
	225	#define OS_O_ATOMIC 040000000
	226	#endif
	227
	228	#ifdef MADV_REMOVE
	229	#define FIO_MADV_FREE MADV_REMOVE
	230	#endif
	231
	232	/* Check for GCC or Clang byte swap intrinsics */
	233	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	234	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	235	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
	236	#define fio_swap16(x) __builtin_bswap16(x)
	237	#define fio_swap32(x) __builtin_bswap32(x)
	238	#define fio_swap64(x) __builtin_bswap64(x)
	239	#else
	240	#include <byteswap.h>
	241	#define fio_swap16(x) bswap_16(x)
	242	#define fio_swap32(x) bswap_32(x)
	243	#define fio_swap64(x) bswap_64(x)
	244	#endif /* fio_swapN */
	245
	246	#define CACHE_LINE_FILE \
	247	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	248
	249	static inline int arch_cache_line_size(void)
	250	{
	251	char size[32];
	252	int fd, ret;
	253
	254	fd = open(CACHE_LINE_FILE, O_RDONLY);
	255	if (fd < 0)
	256	return -1;
	257
	258	ret = read(fd, size, sizeof(size));
	259
	260	close(fd);
	261
	262	if (ret <= 0)
	263	return -1;
	264	else
	265	return atoi(size);
	266	}
	267
	268	#ifdef __powerpc64__
	269	#define FIO_HAVE_CPU_ONLINE_SYSCONF
	270	static inline unsigned int cpus_online(void)
	271	{
	272	return sysconf(_SC_NPROCESSORS_CONF);
	273	}
	274	#endif
	275
	276	static inline unsigned long long get_fs_free_size(const char *path)
	277	{
	278	unsigned long long ret;
	279	struct statfs s;
	280
	281	if (statfs(path, &s) < 0)
	282	return -1ULL;
	283
	284	ret = s.f_bsize;
	285	ret *= (unsigned long long) s.f_bfree;
	286	return ret;
	287	}
	288
	289	static inline int os_trim(struct fio_file *f, unsigned long long start,
	290	unsigned long long len)
	291	{
	292	uint64_t range[2];
	293
	294	range[0] = start;
	295	range[1] = len;
	296
	297	if (!ioctl(f->fd, BLKDISCARD, range))
	298	return 0;
	299
	300	return errno;
	301	}
	302
	303	#ifdef CONFIG_SCHED_IDLE
	304	static inline int fio_set_sched_idle(void)
	305	{
	306	struct sched_param p = { .sched_priority = 0, };
	307	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	308	}
	309	#endif
	310
	311	#ifndef F_GET_RW_HINT
	312	#ifndef F_LINUX_SPECIFIC_BASE
	313	#define F_LINUX_SPECIFIC_BASE 1024
	314	#endif
	315	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	316	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
	317	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
	318	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
	319	#endif
	320
	321	#ifndef RWH_WRITE_LIFE_NONE
	322	#define RWH_WRITE_LIFE_NOT_SET 0
	323	#define RWH_WRITE_LIFE_NONE 1
	324	#define RWH_WRITE_LIFE_SHORT 2
	325	#define RWH_WRITE_LIFE_MEDIUM 3
	326	#define RWH_WRITE_LIFE_LONG 4
	327	#define RWH_WRITE_LIFE_EXTREME 5
	328	#endif
	329
	330	#define FIO_HAVE_WRITE_HINT
	331
	332	#ifndef RWF_HIPRI
	333	#define RWF_HIPRI 0x00000001
	334	#endif
	335	#ifndef RWF_DSYNC
	336	#define RWF_DSYNC 0x00000002
	337	#endif
	338	#ifndef RWF_SYNC
	339	#define RWF_SYNC 0x00000004
	340	#endif
	341
	342	#ifndef RWF_WRITE_LIFE_SHIFT
	343	#define RWF_WRITE_LIFE_SHIFT 4
	344	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	345	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	346	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	347	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	348	#endif
	349
	350	#ifndef CONFIG_PWRITEV2
	351	#ifdef __NR_preadv2
	352	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	353	off_t offset)
	354	{
	355	#if BITS_PER_LONG == 64
	356	*pos_l = offset;
	357	*pos_h = 0;
	358	#else
	359	*pos_l = offset & 0xffffffff;
	360	*pos_h = ((uint64_t) offset) >> 32;
	361	#endif
	362	}
	363	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	364	off_t offset, unsigned int flags)
	365	{
	366	unsigned long pos_l, pos_h;
	367
	368	make_pos_h_l(&pos_h, &pos_l, offset);
	369	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	370	}
	371	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	372	off_t offset, unsigned int flags)
	373	{
	374	unsigned long pos_l, pos_h;
	375
	376	make_pos_h_l(&pos_h, &pos_l, offset);
	377	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	378	}
	379	#else
	380	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	381	off_t offset, unsigned int flags)
	382	{
	383	errno = ENOSYS;
	384	return -1;
	385	}
	386	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	387	off_t offset, unsigned int flags)
	388	{
	389	errno = ENOSYS;
	390	return -1;
	391	}
	392	#endif /* __NR_preadv2 */
	393	#endif /* CONFIG_PWRITEV2 */
	394
	395	static inline int shm_attach_to_open_removed(void)
	396	{
	397	return 1;
	398	}
	399
	400	#ifdef CONFIG_LINUX_FALLOCATE
	401	#define FIO_HAVE_NATIVE_FALLOCATE
	402	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	403	uint64_t len)
	404	{
	405	int ret;
	406	ret = fallocate(f->fd, 0, 0, len);
	407	if (ret == 0)
	408	return true;
	409
	410	/* Work around buggy old glibc versions... */
	411	if (ret > 0)
	412	errno = ret;
	413
	414	return false;
	415	}
	416	#endif
	417
	418	#define FIO_HAVE_CPU_HAS
	419	static inline bool os_cpu_has(cpu_features feature)
	420	{
	421	bool have_feature;
	422	unsigned long fio_unused hwcap;
	423
	424	switch (feature) {
	425	#ifdef ARCH_HAVE_CRC_CRYPTO
	426	case CPU_ARM64_CRC32C:
	427	hwcap = getauxval(AT_HWCAP);
	428	have_feature = (hwcap & HWCAP_CRC32) != 0;
	429	break;
	430	#endif
	431	default:
	432	have_feature = false;
	433	}
	434
	435	return have_feature;
	436	}
	437
	438	#endif