[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_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_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_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	#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_PMULL
	24	#define HWCAP_PMULL (1 << 4)
	25	#endif /* HWCAP_PMULL */
	26	#ifndef HWCAP_CRC32
	27	#define HWCAP_CRC32 (1 << 7)
	28	#endif /* HWCAP_CRC32 */
	29	#endif /* ARCH_HAVE_CRC_CRYPTO */
	30
	31	#include "./os-linux-syscall.h"
	32	#include "../file.h"
	33
	34	#ifndef __has_builtin // Optional of course.
	35	#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
	36	#endif
	37
	38	#define FIO_HAVE_CPU_AFFINITY
	39	#define FIO_HAVE_DISK_UTIL
	40	#define FIO_HAVE_SGIO
	41	#define FIO_HAVE_IOPRIO
	42	#define FIO_HAVE_IOPRIO_CLASS
	43	#define FIO_HAVE_IOSCHED_SWITCH
	44	#define FIO_HAVE_ODIRECT
	45	#define FIO_HAVE_HUGETLB
	46	#define FIO_HAVE_BLKTRACE
	47	#define FIO_HAVE_CL_SIZE
	48	#define FIO_HAVE_CGROUPS
	49	#define FIO_HAVE_FS_STAT
	50	#define FIO_HAVE_TRIM
	51	#define FIO_HAVE_GETTID
	52	#define FIO_USE_GENERIC_INIT_RANDOM_STATE
	53	#define FIO_HAVE_PWRITEV2
	54	#define FIO_HAVE_SHM_ATTACH_REMOVED
	55
	56	#ifdef MAP_HUGETLB
	57	#define FIO_HAVE_MMAP_HUGE
	58	#endif
	59
	60	#define OS_MAP_ANON MAP_ANONYMOUS
	61
	62	#define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
	63
	64	typedef cpu_set_t os_cpu_mask_t;
	65
	66	#ifdef CONFIG_3ARG_AFFINITY
	67	#define fio_setaffinity(pid, cpumask) \
	68	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
	69	#define fio_getaffinity(pid, ptr) \
	70	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
	71	#elif defined(CONFIG_2ARG_AFFINITY)
	72	#define fio_setaffinity(pid, cpumask) \
	73	sched_setaffinity((pid), &(cpumask))
	74	#define fio_getaffinity(pid, ptr) \
	75	sched_getaffinity((pid), (ptr))
	76	#endif
	77
	78	#ifdef CONFIG_PTHREAD_GETAFFINITY
	79	#define FIO_HAVE_GET_THREAD_AFFINITY
	80	#define fio_get_thread_affinity(mask) \
	81	pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
	82	#endif
	83
	84	#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
	85	#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
	86	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
	87	#define fio_cpu_count(mask) CPU_COUNT((mask))
	88
	89	static inline int fio_cpuset_init(os_cpu_mask_t *mask)
	90	{
	91	CPU_ZERO(mask);
	92	return 0;
	93	}
	94
	95	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	96	{
	97	return 0;
	98	}
	99
	100	#define FIO_MAX_CPUS CPU_SETSIZE
	101
	102	enum {
	103	IOPRIO_CLASS_NONE,
	104	IOPRIO_CLASS_RT,
	105	IOPRIO_CLASS_BE,
	106	IOPRIO_CLASS_IDLE,
	107	};
	108
	109	enum {
	110	IOPRIO_WHO_PROCESS = 1,
	111	IOPRIO_WHO_PGRP,
	112	IOPRIO_WHO_USER,
	113	};
	114
	115	#define IOPRIO_BITS 16
	116	#define IOPRIO_CLASS_SHIFT 13
	117
	118	#define IOPRIO_MIN_PRIO 0 /* highest priority */
	119	#define IOPRIO_MAX_PRIO 7 /* lowest priority */
	120
	121	#define IOPRIO_MIN_PRIO_CLASS 0
	122	#define IOPRIO_MAX_PRIO_CLASS 3
	123
	124	static inline int ioprio_value(int ioprio_class, int ioprio)
	125	{
	126	/*
	127	* If no class is set, assume BE
	128	*/
	129	if (!ioprio_class)
	130	ioprio_class = IOPRIO_CLASS_BE;
	131
	132	return (ioprio_class << IOPRIO_CLASS_SHIFT) \| ioprio;
	133	}
	134
	135	static inline bool ioprio_value_is_class_rt(unsigned int priority)
	136	{
	137	return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
	138	}
	139
	140	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	141	{
	142	return syscall(__NR_ioprio_set, which, who,
	143	ioprio_value(ioprio_class, ioprio));
	144	}
	145
	146	#ifndef CONFIG_HAVE_GETTID
	147	static inline int gettid(void)
	148	{
	149	return syscall(__NR_gettid);
	150	}
	151	#endif
	152
	153	#define SPLICE_DEF_SIZE (64*1024)
	154
	155	#ifndef BLKGETSIZE64
	156	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	157	#endif
	158
	159	#ifndef BLKFLSBUF
	160	#define BLKFLSBUF _IO(0x12,97)
	161	#endif
	162
	163	#ifndef BLKDISCARD
	164	#define BLKDISCARD _IO(0x12,119)
	165	#endif
	166
	167	static inline int blockdev_invalidate_cache(struct fio_file *f)
	168	{
	169	return ioctl(f->fd, BLKFLSBUF);
	170	}
	171
	172	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
	173	{
	174	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
	175	return 0;
	176
	177	return errno;
	178	}
	179
	180	static inline unsigned long long os_phys_mem(void)
	181	{
	182	long pagesize, pages;
	183
	184	pagesize = sysconf(_SC_PAGESIZE);
	185	pages = sysconf(_SC_PHYS_PAGES);
	186	if (pages == -1 \|\| pagesize == -1)
	187	return 0;
	188
	189	return (unsigned long long) pages * (unsigned long long) pagesize;
	190	}
	191
	192	#ifdef O_NOATIME
	193	#define FIO_O_NOATIME O_NOATIME
	194	#else
	195	#define FIO_O_NOATIME 0
	196	#endif
	197
	198	#ifdef O_ATOMIC
	199	#define OS_O_ATOMIC O_ATOMIC
	200	#else
	201	#define OS_O_ATOMIC 040000000
	202	#endif
	203
	204	#ifdef MADV_REMOVE
	205	#define FIO_MADV_FREE MADV_REMOVE
	206	#endif
	207
	208	/* Check for GCC or Clang byte swap intrinsics */
	209	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	210	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	211	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
	212	#define fio_swap16(x) __builtin_bswap16(x)
	213	#define fio_swap32(x) __builtin_bswap32(x)
	214	#define fio_swap64(x) __builtin_bswap64(x)
	215	#else
	216	#include <byteswap.h>
	217	#define fio_swap16(x) bswap_16(x)
	218	#define fio_swap32(x) bswap_32(x)
	219	#define fio_swap64(x) bswap_64(x)
	220	#endif /* fio_swapN */
	221
	222	#define CACHE_LINE_FILE \
	223	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	224
	225	static inline int arch_cache_line_size(void)
	226	{
	227	char size[32];
	228	int fd, ret;
	229
	230	fd = open(CACHE_LINE_FILE, O_RDONLY);
	231	if (fd < 0)
	232	return -1;
	233
	234	ret = read(fd, size, sizeof(size));
	235
	236	close(fd);
	237
	238	if (ret <= 0)
	239	return -1;
	240	else
	241	return atoi(size);
	242	}
	243
	244	#ifdef __powerpc64__
	245	#define FIO_HAVE_CPU_ONLINE_SYSCONF
	246	static inline unsigned int cpus_online(void)
	247	{
	248	return sysconf(_SC_NPROCESSORS_CONF);
	249	}
	250	#endif
	251
	252	static inline unsigned long long get_fs_free_size(const char *path)
	253	{
	254	unsigned long long ret;
	255	struct statfs s;
	256
	257	if (statfs(path, &s) < 0)
	258	return -1ULL;
	259
	260	ret = s.f_bsize;
	261	ret *= (unsigned long long) s.f_bfree;
	262	return ret;
	263	}
	264
	265	static inline int os_trim(struct fio_file *f, unsigned long long start,
	266	unsigned long long len)
	267	{
	268	uint64_t range[2];
	269
	270	range[0] = start;
	271	range[1] = len;
	272
	273	if (!ioctl(f->fd, BLKDISCARD, range))
	274	return 0;
	275
	276	return errno;
	277	}
	278
	279	#ifdef CONFIG_SCHED_IDLE
	280	static inline int fio_set_sched_idle(void)
	281	{
	282	struct sched_param p = { .sched_priority = 0, };
	283	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	284	}
	285	#endif
	286
	287	#ifndef F_GET_RW_HINT
	288	#ifndef F_LINUX_SPECIFIC_BASE
	289	#define F_LINUX_SPECIFIC_BASE 1024
	290	#endif
	291	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	292	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
	293	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
	294	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
	295	#endif
	296
	297	#ifndef RWH_WRITE_LIFE_NONE
	298	#define RWH_WRITE_LIFE_NOT_SET 0
	299	#define RWH_WRITE_LIFE_NONE 1
	300	#define RWH_WRITE_LIFE_SHORT 2
	301	#define RWH_WRITE_LIFE_MEDIUM 3
	302	#define RWH_WRITE_LIFE_LONG 4
	303	#define RWH_WRITE_LIFE_EXTREME 5
	304	#endif
	305
	306	#define FIO_HAVE_WRITE_HINT
	307
	308	#ifndef RWF_HIPRI
	309	#define RWF_HIPRI 0x00000001
	310	#endif
	311	#ifndef RWF_DSYNC
	312	#define RWF_DSYNC 0x00000002
	313	#endif
	314	#ifndef RWF_SYNC
	315	#define RWF_SYNC 0x00000004
	316	#endif
	317	#ifndef RWF_NOWAIT
	318	#define RWF_NOWAIT 0x00000008
	319	#endif
	320
	321	#ifndef RWF_UNCACHED
	322	#define RWF_UNCACHED 0x00000040
	323	#endif
	324
	325	#ifndef RWF_WRITE_LIFE_SHIFT
	326	#define RWF_WRITE_LIFE_SHIFT 4
	327	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	328	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	329	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	330	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	331	#endif
	332
	333	#ifndef CONFIG_PWRITEV2
	334	#ifdef __NR_preadv2
	335	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	336	off_t offset)
	337	{
	338	#if BITS_PER_LONG == 64
	339	*pos_l = offset;
	340	*pos_h = 0;
	341	#else
	342	*pos_l = offset & 0xffffffff;
	343	*pos_h = ((uint64_t) offset) >> 32;
	344	#endif
	345	}
	346	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	347	off_t offset, unsigned int flags)
	348	{
	349	unsigned long pos_l, pos_h;
	350
	351	make_pos_h_l(&pos_h, &pos_l, offset);
	352	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	353	}
	354	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	355	off_t offset, unsigned int flags)
	356	{
	357	unsigned long pos_l, pos_h;
	358
	359	make_pos_h_l(&pos_h, &pos_l, offset);
	360	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	361	}
	362	#else
	363	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	364	off_t offset, unsigned int flags)
	365	{
	366	errno = ENOSYS;
	367	return -1;
	368	}
	369	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	370	off_t offset, unsigned int flags)
	371	{
	372	errno = ENOSYS;
	373	return -1;
	374	}
	375	#endif /* __NR_preadv2 */
	376	#endif /* CONFIG_PWRITEV2 */
	377
	378	static inline int shm_attach_to_open_removed(void)
	379	{
	380	return 1;
	381	}
	382
	383	#ifdef CONFIG_LINUX_FALLOCATE
	384	#define FIO_HAVE_NATIVE_FALLOCATE
	385	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	386	uint64_t len)
	387	{
	388	int ret;
	389	ret = fallocate(f->fd, 0, offset, len);
	390	if (ret == 0)
	391	return true;
	392
	393	/* Work around buggy old glibc versions... */
	394	if (ret > 0)
	395	errno = ret;
	396
	397	return false;
	398	}
	399	#endif
	400
	401	#define FIO_HAVE_CPU_HAS
	402	static inline bool os_cpu_has(cpu_features feature)
	403	{
	404	bool have_feature;
	405	unsigned long fio_unused hwcap;
	406
	407	switch (feature) {
	408	#ifdef ARCH_HAVE_CRC_CRYPTO
	409	case CPU_ARM64_CRC32C:
	410	hwcap = getauxval(AT_HWCAP);
	411	have_feature = (hwcap & (HWCAP_PMULL \| HWCAP_CRC32)) ==
	412	(HWCAP_PMULL \| HWCAP_CRC32);
	413	break;
	414	#endif
	415	default:
	416	have_feature = false;
	417	}
	418
	419	return have_feature;
	420	}
	421
	422	#endif