[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_HINT_BITS	10
#define IOPRIO_HINT_SHIFT	3

#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

#define IOPRIO_MIN_PRIO_HINT	0
#define IOPRIO_MAX_PRIO_HINT	((1 << IOPRIO_HINT_BITS) - 1)

#define ioprio_class(ioprio)	((ioprio) >> IOPRIO_CLASS_SHIFT)
#define ioprio(ioprio)		((ioprio) & IOPRIO_MAX_PRIO)
#define ioprio_hint(ioprio)	\
	(((ioprio) >> IOPRIO_HINT_SHIFT) & IOPRIO_MAX_PRIO_HINT)

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

	return (ioprio_class << IOPRIO_CLASS_SHIFT) |
		(ioprio_hint << IOPRIO_HINT_SHIFT) |
		ioprio;
}

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

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

#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
ebac4655 JA	1	#ifndef FIO_OS_LINUX_H
	2	#define FIO_OS_LINUX_H
	3
910f378a BVA	4	#ifdef __ANDROID__
	5	#define FIO_OS os_android
	6	#else
cca84643	7	#define FIO_OS os_linux
910f378a	8	#endif
cca84643	9
ebac4655	10	#include <sys/ioctl.h>
8756e4d4	11	#include <sys/uio.h>
3c39a379	12	#include <sys/syscall.h>
250e878a	13	#include <sys/sysmacros.h>
2e3bd4c2	14	#include <sys/vfs.h>
39b93568	15	#include <sys/mman.h>
3c39a379	16	#include <unistd.h>
97fbdfa1	17	#include <fcntl.h>
3c2d93ed	18	#include <errno.h>
d09913c2	19	#include <sched.h>
ea421790	20	#include <linux/unistd.h>
07e5b264	21	#include <linux/major.h>
1894d171 TK	22	#include <linux/fs.h>
1894d171 TK	23	#include <scsi/sg.h>
e69d8385	24	#include <asm/byteorder.h>
910f378a BVA	25	#ifdef __ANDROID__
	26	#include "os-ashmem.h"
	27	#define FIO_NO_HAVE_SHM_H
	28	#endif
ebac4655	29
58828d07 SW	30	#ifdef ARCH_HAVE_CRC_CRYPTO
58828d07 SW	31	#include <sys/auxv.h>
3721c7fe SW	32	#ifndef HWCAP_PMULL
	33	#define HWCAP_PMULL (1 << 4)
	34	#endif /* HWCAP_PMULL */
58828d07 SW	35	#ifndef HWCAP_CRC32
	36	#define HWCAP_CRC32 (1 << 7)
	37	#endif /* HWCAP_CRC32 */
	38	#endif /* ARCH_HAVE_CRC_CRYPTO */
	39
1c764dbe	40	#include "./os-linux-syscall.h"
e2e58886	41	#include "../file.h"
f3de88a7	42
7922a7b7 OM	43	#ifndef __has_builtin // Optional of course.
	44	#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
	45	#endif
	46
ebac4655 JA	47	#define FIO_HAVE_CPU_AFFINITY
	48	#define FIO_HAVE_DISK_UTIL
	49	#define FIO_HAVE_SGIO
ba4f8923	50	#define FIO_HAVE_IOPRIO
32ef447a	51	#define FIO_HAVE_IOPRIO_CLASS
22f78b32	52	#define FIO_HAVE_IOSCHED_SWITCH
2c0ecd28	53	#define FIO_HAVE_ODIRECT
74b025b0	54	#define FIO_HAVE_HUGETLB
5e62c22a	55	#define FIO_HAVE_BLKTRACE
eb7ccf38	56	#define FIO_HAVE_CL_SIZE
a696fa2a	57	#define FIO_HAVE_CGROUPS
2e3bd4c2	58	#define FIO_HAVE_FS_STAT
a5f3027c	59	#define FIO_HAVE_TRIM
47f767c1	60	#define FIO_HAVE_GETTID
93bcfd20	61	#define FIO_USE_GENERIC_INIT_RANDOM_STATE
e69d8385	62	#define FIO_HAVE_BYTEORDER_FUNCS
6562685f	63	#define FIO_HAVE_PWRITEV2
97900ebf	64	#define FIO_HAVE_SHM_ATTACH_REMOVED
b6959b55	65
39b93568 JA	66	#ifdef MAP_HUGETLB
	67	#define FIO_HAVE_MMAP_HUGE
	68	#endif
	69
dc873b6f	70	#define OS_MAP_ANON MAP_ANONYMOUS
ebac4655	71
4db9ac71	72	#define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
5a8a6a03	73
ebac4655	74	typedef cpu_set_t os_cpu_mask_t;
4e78e405	75
67bf9823	76	#ifdef CONFIG_3ARG_AFFINITY
e8462bd8 JA	77	#define fio_setaffinity(pid, cpumask) \
e8462bd8 JA	78	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
ebac4655 JA	79	#define fio_getaffinity(pid, ptr) \
ebac4655 JA	80	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
67bf9823	81	#elif defined(CONFIG_2ARG_AFFINITY)
e8462bd8 JA	82	#define fio_setaffinity(pid, cpumask) \
e8462bd8 JA	83	sched_setaffinity((pid), &(cpumask))
c8f025f8 JA	84	#define fio_getaffinity(pid, ptr) \
	85	sched_getaffinity((pid), (ptr))
	86	#endif
be4ecfdf	87
e9d2a04d TK	88	#ifdef CONFIG_PTHREAD_GETAFFINITY
e9d2a04d TK	89	#define FIO_HAVE_GET_THREAD_AFFINITY
874d55e5 JA	90	#define fio_get_thread_affinity(mask) \
874d55e5 JA	91	pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
e9d2a04d	92	#endif
874d55e5	93
6e0cefdc BVA	94	#define fio_cpu_clear(mask, cpu) CPU_CLR((cpu), (mask))
6e0cefdc BVA	95	#define fio_cpu_set(mask, cpu) CPU_SET((cpu), (mask))
52fd65f4	96	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
d004a209	97	#define fio_cpu_count(mask) CPU_COUNT((mask))
d2ce18b5 JA	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	}
6d459ee7 JA	109
6d459ee7 JA	110	#define FIO_MAX_CPUS CPU_SETSIZE
4d8947de	111
28727df7 JA	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
b3048c1b DLM	128	#define IOPRIO_HINT_BITS 10
	129	#define IOPRIO_HINT_SHIFT 3
	130
1767bd34 TK	131	#define IOPRIO_MIN_PRIO 0 /* highest priority */
	132	#define IOPRIO_MAX_PRIO 7 /* lowest priority */
	133
	134	#define IOPRIO_MIN_PRIO_CLASS 0
	135	#define IOPRIO_MAX_PRIO_CLASS 3
	136
b3048c1b DLM	137	#define IOPRIO_MIN_PRIO_HINT 0
	138	#define IOPRIO_MAX_PRIO_HINT ((1 << IOPRIO_HINT_BITS) - 1)
	139
d4d503a5 DLM	140	#define ioprio_class(ioprio) ((ioprio) >> IOPRIO_CLASS_SHIFT)
d4d503a5 DLM	141	#define ioprio(ioprio) ((ioprio) & IOPRIO_MAX_PRIO)
b3048c1b DLM	142	#define ioprio_hint(ioprio) \
b3048c1b DLM	143	(((ioprio) >> IOPRIO_HINT_SHIFT) & IOPRIO_MAX_PRIO_HINT)
d4d503a5	144
b3048c1b	145	static inline int ioprio_value(int ioprio_class, int ioprio, int ioprio_hint)
ebac4655	146	{
28727df7 JA	147	/*
	148	* If no class is set, assume BE
	149	*/
8d6e8d99 DLM	150	if (!ioprio_class)
	151	ioprio_class = IOPRIO_CLASS_BE;
	152
b3048c1b DLM	153	return (ioprio_class << IOPRIO_CLASS_SHIFT) \|
	154	(ioprio_hint << IOPRIO_HINT_SHIFT) \|
	155	ioprio;
8d6e8d99	156	}
28727df7	157
03ec570f DLM	158	static inline bool ioprio_value_is_class_rt(unsigned int priority)
03ec570f DLM	159	{
d4d503a5	160	return ioprio_class(priority) == IOPRIO_CLASS_RT;
03ec570f DLM	161	}
03ec570f DLM	162
b3048c1b DLM	163	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio,
b3048c1b DLM	164	int ioprio_hint)
8d6e8d99 DLM	165	{
8d6e8d99 DLM	166	return syscall(__NR_ioprio_set, which, who,
b3048c1b	167	ioprio_value(ioprio_class, ioprio, ioprio_hint));
ebac4655 JA	168	}
ebac4655 JA	169
de5ed0e4	170	#ifndef CONFIG_HAVE_GETTID
47f767c1 JA	171	static inline int gettid(void)
	172	{
	173	return syscall(__NR_gettid);
	174	}
de5ed0e4	175	#endif
47f767c1	176
3feedc60 JA	177	#define SPLICE_DEF_SIZE (64*1024)
3feedc60 JA	178
ebac4655 JA	179	#ifndef BLKGETSIZE64
	180	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	181	#endif
	182
e5b401d4 JA	183	#ifndef BLKFLSBUF
	184	#define BLKFLSBUF _IO(0x12,97)
	185	#endif
	186
a5f3027c JA	187	#ifndef BLKDISCARD
	188	#define BLKDISCARD _IO(0x12,119)
	189	#endif
	190
e2e58886	191	static inline int blockdev_invalidate_cache(struct fio_file *f)
e5b401d4	192	{
ecc314ba	193	return ioctl(f->fd, BLKFLSBUF);
e5b401d4 JA	194	}
e5b401d4 JA	195
ecc314ba	196	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
ebac4655	197	{
ecc314ba	198	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
ebac4655 JA	199	return 0;
	200
	201	return errno;
	202	}
	203
32cd46a0 JA	204	static inline unsigned long long os_phys_mem(void)
	205	{
	206	long pagesize, pages;
	207
	208	pagesize = sysconf(_SC_PAGESIZE);
	209	pages = sysconf(_SC_PHYS_PAGES);
	210	if (pages == -1 \|\| pagesize == -1)
	211	return 0;
	212
	213	return (unsigned long long) pages * (unsigned long long) pagesize;
	214	}
	215
5b6f5c66	216	#ifdef O_NOATIME
5921e80c	217	#define FIO_O_NOATIME O_NOATIME
5b6f5c66 JA	218	#else
	219	#define FIO_O_NOATIME 0
	220	#endif
5921e80c	221
a1c58075 JA	222	#ifdef MADV_REMOVE
	223	#define FIO_MADV_FREE MADV_REMOVE
	224	#endif
	225
7922a7b7 OM	226	/* Check for GCC or Clang byte swap intrinsics */
	227	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	228	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	229	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
df73aab1	230	#define fio_swap16(x) __builtin_bswap16(x)
df73aab1	231	#define fio_swap32(x) __builtin_bswap32(x)
df73aab1 JA	232	#define fio_swap64(x) __builtin_bswap64(x)
df73aab1 JA	233	#else
7922a7b7 OM	234	#include <byteswap.h>
	235	#define fio_swap16(x) bswap_16(x)
	236	#define fio_swap32(x) bswap_32(x)
	237	#define fio_swap64(x) bswap_64(x)
	238	#endif /* fio_swapN */
ff245192	239
eb7ccf38 JA	240	#define CACHE_LINE_FILE \
	241	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	242
	243	static inline int arch_cache_line_size(void)
	244	{
	245	char size[32];
	246	int fd, ret;
	247
	248	fd = open(CACHE_LINE_FILE, O_RDONLY);
	249	if (fd < 0)
	250	return -1;
	251
	252	ret = read(fd, size, sizeof(size));
ec76f15a JA	253
	254	close(fd);
	255
eb7ccf38 JA	256	if (ret <= 0)
eb7ccf38 JA	257	return -1;
ec76f15a JA	258	else
ec76f15a JA	259	return atoi(size);
eb7ccf38 JA	260	}
eb7ccf38 JA	261
c08ad04c	262	static inline unsigned long long get_fs_free_size(const char *path)
2e3bd4c2 JA	263	{
	264	unsigned long long ret;
	265	struct statfs s;
	266
	267	if (statfs(path, &s) < 0)
	268	return -1ULL;
	269
	270	ret = s.f_bsize;
	271	ret *= (unsigned long long) s.f_bfree;
	272	return ret;
	273	}
	274
496b1f9e	275	static inline int os_trim(struct fio_file *f, unsigned long long start,
a5f3027c JA	276	unsigned long long len)
	277	{
	278	uint64_t range[2];
	279
	280	range[0] = start;
	281	range[1] = len;
	282
496b1f9e	283	if (!ioctl(f->fd, BLKDISCARD, range))
a5f3027c JA	284	return 0;
	285
	286	return errno;
	287	}
	288
7e09a9f1	289	#ifdef CONFIG_SCHED_IDLE
f2a2ce0e HL	290	static inline int fio_set_sched_idle(void)
	291	{
	292	struct sched_param p = { .sched_priority = 0, };
	293	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	294	}
7e09a9f1	295	#endif
f2a2ce0e	296
ae8e559e JA	297	#ifndef F_GET_RW_HINT
	298	#ifndef F_LINUX_SPECIFIC_BASE
	299	#define F_LINUX_SPECIFIC_BASE 1024
	300	#endif
	301	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	302	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
bd553af6 JA	303	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
bd553af6 JA	304	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
ae8e559e JA	305	#endif
	306
	307	#ifndef RWH_WRITE_LIFE_NONE
bd553af6 JA	308	#define RWH_WRITE_LIFE_NOT_SET 0
	309	#define RWH_WRITE_LIFE_NONE 1
	310	#define RWH_WRITE_LIFE_SHORT 2
	311	#define RWH_WRITE_LIFE_MEDIUM 3
	312	#define RWH_WRITE_LIFE_LONG 4
	313	#define RWH_WRITE_LIFE_EXTREME 5
37659335 JA	314	#endif
37659335 JA	315
ae8e559e	316	#define FIO_HAVE_WRITE_HINT
37659335	317
6562685f JA	318	#ifndef RWF_HIPRI
	319	#define RWF_HIPRI 0x00000001
	320	#endif
	321	#ifndef RWF_DSYNC
	322	#define RWF_DSYNC 0x00000002
	323	#endif
	324	#ifndef RWF_SYNC
	325	#define RWF_SYNC 0x00000004
	326	#endif
7d42e66e KK	327	#ifndef RWF_NOWAIT
	328	#define RWF_NOWAIT 0x00000008
	329	#endif
6562685f	330
4a87b584	331	#ifndef RWF_UNCACHED
8beee62d	332	#define RWF_UNCACHED 0x00000040
4a87b584 JA	333	#endif
4a87b584 JA	334
72cd4146 JA	335	#ifndef RWF_WRITE_LIFE_SHIFT
	336	#define RWF_WRITE_LIFE_SHIFT 4
	337	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	338	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	339	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	340	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	341	#endif
	342
6562685f JA	343	#ifndef CONFIG_PWRITEV2
	344	#ifdef __NR_preadv2
	345	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	346	off_t offset)
	347	{
7b5c648f	348	#if BITS_PER_LONG == 64
7b5c648f JA	349	*pos_l = offset;
	350	*pos_h = 0;
	351	#else
6562685f JA	352	*pos_l = offset & 0xffffffff;
6562685f JA	353	*pos_h = ((uint64_t) offset) >> 32;
7b5c648f	354	#endif
6562685f JA	355	}
	356	static inline ssize_t preadv2(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_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	363	}
	364	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	365	off_t offset, unsigned int flags)
	366	{
	367	unsigned long pos_l, pos_h;
	368
	369	make_pos_h_l(&pos_h, &pos_l, offset);
	370	return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	371	}
	372	#else
	373	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	374	off_t offset, unsigned int flags)
	375	{
	376	errno = ENOSYS;
	377	return -1;
	378	}
	379	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	380	off_t offset, unsigned int flags)
	381	{
	382	errno = ENOSYS;
	383	return -1;
	384	}
	385	#endif /* __NR_preadv2 */
	386	#endif /* CONFIG_PWRITEV2 */
	387
0cfe2089 TK	388	static inline int shm_attach_to_open_removed(void)
	389	{
	390	return 1;
	391	}
	392
2c3e17be SW	393	#ifdef CONFIG_LINUX_FALLOCATE
	394	#define FIO_HAVE_NATIVE_FALLOCATE
	395	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	396	uint64_t len)
	397	{
	398	int ret;
e69dfc2b	399	ret = fallocate(f->fd, 0, offset, len);
2c3e17be SW	400	if (ret == 0)
	401	return true;
	402
	403	/* Work around buggy old glibc versions... */
	404	if (ret > 0)
	405	errno = ret;
	406
	407	return false;
	408	}
	409	#endif
	410
58828d07 SW	411	#define FIO_HAVE_CPU_HAS
	412	static inline bool os_cpu_has(cpu_features feature)
	413	{
	414	bool have_feature;
	415	unsigned long fio_unused hwcap;
	416
	417	switch (feature) {
	418	#ifdef ARCH_HAVE_CRC_CRYPTO
	419	case CPU_ARM64_CRC32C:
	420	hwcap = getauxval(AT_HWCAP);
3721c7fe SW	421	have_feature = (hwcap & (HWCAP_PMULL \| HWCAP_CRC32)) ==
3721c7fe SW	422	(HWCAP_PMULL \| HWCAP_CRC32);
58828d07 SW	423	break;
	424	#endif
	425	default:
	426	have_feature = false;
	427	}
	428
	429	return have_feature;
	430	}
	431
ebac4655	432	#endif