[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/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_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

#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)	(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_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 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_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_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/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
	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	#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
	86	static inline int fio_cpuset_init(os_cpu_mask_t *mask)
	87	{
	88	CPU_ZERO(mask);
	89	return 0;
	90	}
	91
	92	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	93	{
	94	return 0;
	95	}
	96
	97	#define FIO_MAX_CPUS CPU_SETSIZE
	98
	99	enum {
	100	IOPRIO_CLASS_NONE,
	101	IOPRIO_CLASS_RT,
	102	IOPRIO_CLASS_BE,
	103	IOPRIO_CLASS_IDLE,
	104	};
	105
	106	enum {
	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
	121	static inline int ioprio_value(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	return (ioprio_class << IOPRIO_CLASS_SHIFT) \| ioprio;
	130	}
	131
	132	static inline bool ioprio_value_is_class_rt(unsigned int priority)
	133	{
	134	return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
	135	}
	136
	137	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	138	{
	139	return syscall(__NR_ioprio_set, which, who,
	140	ioprio_value(ioprio_class, ioprio));
	141	}
	142
	143	#ifndef CONFIG_HAVE_GETTID
	144	static inline int gettid(void)
	145	{
	146	return syscall(__NR_gettid);
	147	}
	148	#endif
	149
	150	#define SPLICE_DEF_SIZE (64*1024)
	151
	152	#ifndef BLKGETSIZE64
	153	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	154	#endif
	155
	156	#ifndef BLKFLSBUF
	157	#define BLKFLSBUF _IO(0x12,97)
	158	#endif
	159
	160	#ifndef BLKDISCARD
	161	#define BLKDISCARD _IO(0x12,119)
	162	#endif
	163
	164	static inline int blockdev_invalidate_cache(struct fio_file *f)
	165	{
	166	return ioctl(f->fd, BLKFLSBUF);
	167	}
	168
	169	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
	170	{
	171	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
	172	return 0;
	173
	174	return errno;
	175	}
	176
	177	static inline unsigned long long os_phys_mem(void)
	178	{
	179	long pagesize, pages;
	180
	181	pagesize = sysconf(_SC_PAGESIZE);
	182	pages = sysconf(_SC_PHYS_PAGES);
	183	if (pages == -1 \|\| pagesize == -1)
	184	return 0;
	185
	186	return (unsigned long long) pages * (unsigned long long) pagesize;
	187	}
	188
	189	#ifdef O_NOATIME
	190	#define FIO_O_NOATIME O_NOATIME
	191	#else
	192	#define FIO_O_NOATIME 0
	193	#endif
	194
	195	#ifdef O_ATOMIC
	196	#define OS_O_ATOMIC O_ATOMIC
	197	#else
	198	#define OS_O_ATOMIC 040000000
	199	#endif
	200
	201	#ifdef MADV_REMOVE
	202	#define FIO_MADV_FREE MADV_REMOVE
	203	#endif
	204
	205	/* Check for GCC or Clang byte swap intrinsics */
	206	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	207	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	208	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
	209	#define fio_swap16(x) __builtin_bswap16(x)
	210	#define fio_swap32(x) __builtin_bswap32(x)
	211	#define fio_swap64(x) __builtin_bswap64(x)
	212	#else
	213	#include <byteswap.h>
	214	#define fio_swap16(x) bswap_16(x)
	215	#define fio_swap32(x) bswap_32(x)
	216	#define fio_swap64(x) bswap_64(x)
	217	#endif /* fio_swapN */
	218
	219	#define CACHE_LINE_FILE \
	220	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	221
	222	static inline int arch_cache_line_size(void)
	223	{
	224	char size[32];
	225	int fd, ret;
	226
	227	fd = open(CACHE_LINE_FILE, O_RDONLY);
	228	if (fd < 0)
	229	return -1;
	230
	231	ret = read(fd, size, sizeof(size));
	232
	233	close(fd);
	234
	235	if (ret <= 0)
	236	return -1;
	237	else
	238	return atoi(size);
	239	}
	240
	241	#ifdef __powerpc64__
	242	#define FIO_HAVE_CPU_ONLINE_SYSCONF
	243	static inline unsigned int cpus_online(void)
	244	{
	245	return sysconf(_SC_NPROCESSORS_CONF);
	246	}
	247	#endif
	248
	249	static inline unsigned long long get_fs_free_size(const char *path)
	250	{
	251	unsigned long long ret;
	252	struct statfs s;
	253
	254	if (statfs(path, &s) < 0)
	255	return -1ULL;
	256
	257	ret = s.f_bsize;
	258	ret *= (unsigned long long) s.f_bfree;
	259	return ret;
	260	}
	261
	262	static inline int os_trim(struct fio_file *f, unsigned long long start,
	263	unsigned long long len)
	264	{
	265	uint64_t range[2];
	266
	267	range[0] = start;
	268	range[1] = len;
	269
	270	if (!ioctl(f->fd, BLKDISCARD, range))
	271	return 0;
	272
	273	return errno;
	274	}
	275
	276	#ifdef CONFIG_SCHED_IDLE
	277	static inline int fio_set_sched_idle(void)
	278	{
	279	struct sched_param p = { .sched_priority = 0, };
	280	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	281	}
	282	#endif
	283
	284	#ifndef F_GET_RW_HINT
	285	#ifndef F_LINUX_SPECIFIC_BASE
	286	#define F_LINUX_SPECIFIC_BASE 1024
	287	#endif
	288	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	289	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
	290	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
	291	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
	292	#endif
	293
	294	#ifndef RWH_WRITE_LIFE_NONE
	295	#define RWH_WRITE_LIFE_NOT_SET 0
	296	#define RWH_WRITE_LIFE_NONE 1
	297	#define RWH_WRITE_LIFE_SHORT 2
	298	#define RWH_WRITE_LIFE_MEDIUM 3
	299	#define RWH_WRITE_LIFE_LONG 4
	300	#define RWH_WRITE_LIFE_EXTREME 5
	301	#endif
	302
	303	#define FIO_HAVE_WRITE_HINT
	304
	305	#ifndef RWF_HIPRI
	306	#define RWF_HIPRI 0x00000001
	307	#endif
	308	#ifndef RWF_DSYNC
	309	#define RWF_DSYNC 0x00000002
	310	#endif
	311	#ifndef RWF_SYNC
	312	#define RWF_SYNC 0x00000004
	313	#endif
	314	#ifndef RWF_NOWAIT
	315	#define RWF_NOWAIT 0x00000008
	316	#endif
	317
	318	#ifndef RWF_UNCACHED
	319	#define RWF_UNCACHED 0x00000040
	320	#endif
	321
	322	#ifndef RWF_WRITE_LIFE_SHIFT
	323	#define RWF_WRITE_LIFE_SHIFT 4
	324	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	325	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	326	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	327	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	328	#endif
	329
	330	#ifndef CONFIG_PWRITEV2
	331	#ifdef __NR_preadv2
	332	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	333	off_t offset)
	334	{
	335	#if BITS_PER_LONG == 64
	336	*pos_l = offset;
	337	*pos_h = 0;
	338	#else
	339	*pos_l = offset & 0xffffffff;
	340	*pos_h = ((uint64_t) offset) >> 32;
	341	#endif
	342	}
	343	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	344	off_t offset, unsigned int flags)
	345	{
	346	unsigned long pos_l, pos_h;
	347
	348	make_pos_h_l(&pos_h, &pos_l, offset);
	349	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	350	}
	351	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	352	off_t offset, unsigned int flags)
	353	{
	354	unsigned long pos_l, pos_h;
	355
	356	make_pos_h_l(&pos_h, &pos_l, offset);
	357	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	358	}
	359	#else
	360	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	361	off_t offset, unsigned int flags)
	362	{
	363	errno = ENOSYS;
	364	return -1;
	365	}
	366	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	367	off_t offset, unsigned int flags)
	368	{
	369	errno = ENOSYS;
	370	return -1;
	371	}
	372	#endif /* __NR_preadv2 */
	373	#endif /* CONFIG_PWRITEV2 */
	374
	375	static inline int shm_attach_to_open_removed(void)
	376	{
	377	return 1;
	378	}
	379
	380	#ifdef CONFIG_LINUX_FALLOCATE
	381	#define FIO_HAVE_NATIVE_FALLOCATE
	382	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	383	uint64_t len)
	384	{
	385	int ret;
	386	ret = fallocate(f->fd, 0, offset, len);
	387	if (ret == 0)
	388	return true;
	389
	390	/* Work around buggy old glibc versions... */
	391	if (ret > 0)
	392	errno = ret;
	393
	394	return false;
	395	}
	396	#endif
	397
	398	#define FIO_HAVE_CPU_HAS
	399	static inline bool os_cpu_has(cpu_features feature)
	400	{
	401	bool have_feature;
	402	unsigned long fio_unused hwcap;
	403
	404	switch (feature) {
	405	#ifdef ARCH_HAVE_CRC_CRYPTO
	406	case CPU_ARM64_CRC32C:
	407	hwcap = getauxval(AT_HWCAP);
	408	have_feature = (hwcap & HWCAP_CRC32) != 0;
	409	break;
	410	#endif
	411	default:
	412	have_feature = false;
	413	}
	414
	415	return have_feature;
	416	}
	417
	418	#endif