[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 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
ebac4655 JA	1	#ifndef FIO_OS_LINUX_H
	2	#define FIO_OS_LINUX_H
	3
cca84643 JA	4	#define FIO_OS os_linux
cca84643 JA	5
ebac4655	6	#include <sys/ioctl.h>
8756e4d4	7	#include <sys/uio.h>
3c39a379	8	#include <sys/syscall.h>
250e878a	9	#include <sys/sysmacros.h>
2e3bd4c2	10	#include <sys/vfs.h>
39b93568	11	#include <sys/mman.h>
3c39a379	12	#include <unistd.h>
97fbdfa1	13	#include <fcntl.h>
3c2d93ed	14	#include <errno.h>
d09913c2	15	#include <sched.h>
ea421790	16	#include <linux/unistd.h>
07e5b264	17	#include <linux/major.h>
1894d171 TK	18	#include <linux/fs.h>
1894d171 TK	19	#include <scsi/sg.h>
ebac4655	20
58828d07 SW	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
1c764dbe	28	#include "./os-linux-syscall.h"
e2e58886	29	#include "../file.h"
f3de88a7	30
7922a7b7 OM	31	#ifndef __has_builtin // Optional of course.
	32	#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
	33	#endif
	34
ebac4655 JA	35	#define FIO_HAVE_CPU_AFFINITY
	36	#define FIO_HAVE_DISK_UTIL
	37	#define FIO_HAVE_SGIO
ba4f8923	38	#define FIO_HAVE_IOPRIO
32ef447a	39	#define FIO_HAVE_IOPRIO_CLASS
22f78b32	40	#define FIO_HAVE_IOSCHED_SWITCH
2c0ecd28	41	#define FIO_HAVE_ODIRECT
74b025b0	42	#define FIO_HAVE_HUGETLB
5e62c22a	43	#define FIO_HAVE_BLKTRACE
eb7ccf38	44	#define FIO_HAVE_CL_SIZE
a696fa2a	45	#define FIO_HAVE_CGROUPS
2e3bd4c2	46	#define FIO_HAVE_FS_STAT
a5f3027c	47	#define FIO_HAVE_TRIM
47f767c1	48	#define FIO_HAVE_GETTID
93bcfd20	49	#define FIO_USE_GENERIC_INIT_RANDOM_STATE
6562685f	50	#define FIO_HAVE_PWRITEV2
97900ebf	51	#define FIO_HAVE_SHM_ATTACH_REMOVED
b6959b55	52
39b93568 JA	53	#ifdef MAP_HUGETLB
	54	#define FIO_HAVE_MMAP_HUGE
	55	#endif
	56
dc873b6f	57	#define OS_MAP_ANON MAP_ANONYMOUS
ebac4655	58
4db9ac71	59	#define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
5a8a6a03	60
ebac4655	61	typedef cpu_set_t os_cpu_mask_t;
4e78e405	62
67bf9823	63	#ifdef CONFIG_3ARG_AFFINITY
e8462bd8 JA	64	#define fio_setaffinity(pid, cpumask) \
e8462bd8 JA	65	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
ebac4655 JA	66	#define fio_getaffinity(pid, ptr) \
ebac4655 JA	67	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
67bf9823	68	#elif defined(CONFIG_2ARG_AFFINITY)
e8462bd8 JA	69	#define fio_setaffinity(pid, cpumask) \
e8462bd8 JA	70	sched_setaffinity((pid), &(cpumask))
c8f025f8 JA	71	#define fio_getaffinity(pid, ptr) \
	72	sched_getaffinity((pid), (ptr))
	73	#endif
be4ecfdf	74
e9d2a04d TK	75	#ifdef CONFIG_PTHREAD_GETAFFINITY
e9d2a04d TK	76	#define FIO_HAVE_GET_THREAD_AFFINITY
874d55e5 JA	77	#define fio_get_thread_affinity(mask) \
874d55e5 JA	78	pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
e9d2a04d	79	#endif
874d55e5	80
1f4c0a4f JA	81	#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
1f4c0a4f JA	82	#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
52fd65f4	83	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
d004a209	84	#define fio_cpu_count(mask) CPU_COUNT((mask))
d2ce18b5 JA	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	}
6d459ee7 JA	96
6d459ee7 JA	97	#define FIO_MAX_CPUS CPU_SETSIZE
4d8947de	98
28727df7 JA	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
1767bd34 TK	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
8d6e8d99	121	static inline int ioprio_value(int ioprio_class, int ioprio)
ebac4655	122	{
28727df7 JA	123	/*
	124	* If no class is set, assume BE
	125	*/
8d6e8d99 DLM	126	if (!ioprio_class)
	127	ioprio_class = IOPRIO_CLASS_BE;
	128
	129	return (ioprio_class << IOPRIO_CLASS_SHIFT) \| ioprio;
	130	}
28727df7	131
8d6e8d99 DLM	132	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	133	{
	134	return syscall(__NR_ioprio_set, which, who,
	135	ioprio_value(ioprio_class, ioprio));
ebac4655 JA	136	}
ebac4655 JA	137
de5ed0e4	138	#ifndef CONFIG_HAVE_GETTID
47f767c1 JA	139	static inline int gettid(void)
	140	{
	141	return syscall(__NR_gettid);
	142	}
de5ed0e4	143	#endif
47f767c1	144
3feedc60 JA	145	#define SPLICE_DEF_SIZE (64*1024)
3feedc60 JA	146
ebac4655 JA	147	#ifndef BLKGETSIZE64
	148	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	149	#endif
	150
e5b401d4 JA	151	#ifndef BLKFLSBUF
	152	#define BLKFLSBUF _IO(0x12,97)
	153	#endif
	154
a5f3027c JA	155	#ifndef BLKDISCARD
	156	#define BLKDISCARD _IO(0x12,119)
	157	#endif
	158
e2e58886	159	static inline int blockdev_invalidate_cache(struct fio_file *f)
e5b401d4	160	{
ecc314ba	161	return ioctl(f->fd, BLKFLSBUF);
e5b401d4 JA	162	}
e5b401d4 JA	163
ecc314ba	164	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
ebac4655	165	{
ecc314ba	166	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
ebac4655 JA	167	return 0;
	168
	169	return errno;
	170	}
	171
32cd46a0 JA	172	static inline unsigned long long os_phys_mem(void)
	173	{
	174	long pagesize, pages;
	175
	176	pagesize = sysconf(_SC_PAGESIZE);
	177	pages = sysconf(_SC_PHYS_PAGES);
	178	if (pages == -1 \|\| pagesize == -1)
	179	return 0;
	180
	181	return (unsigned long long) pages * (unsigned long long) pagesize;
	182	}
	183
5b6f5c66	184	#ifdef O_NOATIME
5921e80c	185	#define FIO_O_NOATIME O_NOATIME
5b6f5c66 JA	186	#else
	187	#define FIO_O_NOATIME 0
	188	#endif
5921e80c	189
d01612f3 CM	190	#ifdef O_ATOMIC
	191	#define OS_O_ATOMIC O_ATOMIC
	192	#else
	193	#define OS_O_ATOMIC 040000000
	194	#endif
	195
a1c58075 JA	196	#ifdef MADV_REMOVE
	197	#define FIO_MADV_FREE MADV_REMOVE
	198	#endif
	199
7922a7b7 OM	200	/* Check for GCC or Clang byte swap intrinsics */
	201	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	202	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	203	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
df73aab1	204	#define fio_swap16(x) __builtin_bswap16(x)
df73aab1	205	#define fio_swap32(x) __builtin_bswap32(x)
df73aab1 JA	206	#define fio_swap64(x) __builtin_bswap64(x)
df73aab1 JA	207	#else
7922a7b7 OM	208	#include <byteswap.h>
	209	#define fio_swap16(x) bswap_16(x)
	210	#define fio_swap32(x) bswap_32(x)
	211	#define fio_swap64(x) bswap_64(x)
	212	#endif /* fio_swapN */
ff245192	213
eb7ccf38 JA	214	#define CACHE_LINE_FILE \
	215	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	216
	217	static inline int arch_cache_line_size(void)
	218	{
	219	char size[32];
	220	int fd, ret;
	221
	222	fd = open(CACHE_LINE_FILE, O_RDONLY);
	223	if (fd < 0)
	224	return -1;
	225
	226	ret = read(fd, size, sizeof(size));
ec76f15a JA	227
	228	close(fd);
	229
eb7ccf38 JA	230	if (ret <= 0)
eb7ccf38 JA	231	return -1;
ec76f15a JA	232	else
ec76f15a JA	233	return atoi(size);
eb7ccf38 JA	234	}
eb7ccf38 JA	235
d1419c4f TK	236	#ifdef __powerpc64__
	237	#define FIO_HAVE_CPU_ONLINE_SYSCONF
	238	static inline unsigned int cpus_online(void)
	239	{
	240	return sysconf(_SC_NPROCESSORS_CONF);
	241	}
	242	#endif
	243
c08ad04c	244	static inline unsigned long long get_fs_free_size(const char *path)
2e3bd4c2 JA	245	{
	246	unsigned long long ret;
	247	struct statfs s;
	248
	249	if (statfs(path, &s) < 0)
	250	return -1ULL;
	251
	252	ret = s.f_bsize;
	253	ret *= (unsigned long long) s.f_bfree;
	254	return ret;
	255	}
	256
496b1f9e	257	static inline int os_trim(struct fio_file *f, unsigned long long start,
a5f3027c JA	258	unsigned long long len)
	259	{
	260	uint64_t range[2];
	261
	262	range[0] = start;
	263	range[1] = len;
	264
496b1f9e	265	if (!ioctl(f->fd, BLKDISCARD, range))
a5f3027c JA	266	return 0;
	267
	268	return errno;
	269	}
	270
7e09a9f1	271	#ifdef CONFIG_SCHED_IDLE
f2a2ce0e HL	272	static inline int fio_set_sched_idle(void)
	273	{
	274	struct sched_param p = { .sched_priority = 0, };
	275	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	276	}
7e09a9f1	277	#endif
f2a2ce0e	278
ae8e559e JA	279	#ifndef F_GET_RW_HINT
	280	#ifndef F_LINUX_SPECIFIC_BASE
	281	#define F_LINUX_SPECIFIC_BASE 1024
	282	#endif
	283	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	284	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
bd553af6 JA	285	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
bd553af6 JA	286	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
ae8e559e JA	287	#endif
	288
	289	#ifndef RWH_WRITE_LIFE_NONE
bd553af6 JA	290	#define RWH_WRITE_LIFE_NOT_SET 0
	291	#define RWH_WRITE_LIFE_NONE 1
	292	#define RWH_WRITE_LIFE_SHORT 2
	293	#define RWH_WRITE_LIFE_MEDIUM 3
	294	#define RWH_WRITE_LIFE_LONG 4
	295	#define RWH_WRITE_LIFE_EXTREME 5
37659335 JA	296	#endif
37659335 JA	297
ae8e559e	298	#define FIO_HAVE_WRITE_HINT
37659335	299
6562685f JA	300	#ifndef RWF_HIPRI
	301	#define RWF_HIPRI 0x00000001
	302	#endif
	303	#ifndef RWF_DSYNC
	304	#define RWF_DSYNC 0x00000002
	305	#endif
	306	#ifndef RWF_SYNC
	307	#define RWF_SYNC 0x00000004
	308	#endif
7d42e66e KK	309	#ifndef RWF_NOWAIT
	310	#define RWF_NOWAIT 0x00000008
	311	#endif
6562685f	312
4a87b584	313	#ifndef RWF_UNCACHED
8beee62d	314	#define RWF_UNCACHED 0x00000040
4a87b584 JA	315	#endif
4a87b584 JA	316
72cd4146 JA	317	#ifndef RWF_WRITE_LIFE_SHIFT
	318	#define RWF_WRITE_LIFE_SHIFT 4
	319	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	320	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	321	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	322	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	323	#endif
	324
6562685f JA	325	#ifndef CONFIG_PWRITEV2
	326	#ifdef __NR_preadv2
	327	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	328	off_t offset)
	329	{
7b5c648f	330	#if BITS_PER_LONG == 64
7b5c648f JA	331	*pos_l = offset;
	332	*pos_h = 0;
	333	#else
6562685f JA	334	*pos_l = offset & 0xffffffff;
6562685f JA	335	*pos_h = ((uint64_t) offset) >> 32;
7b5c648f	336	#endif
6562685f JA	337	}
	338	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	339	off_t offset, unsigned int flags)
	340	{
	341	unsigned long pos_l, pos_h;
	342
	343	make_pos_h_l(&pos_h, &pos_l, offset);
	344	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	345	}
	346	static inline ssize_t pwritev2(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_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	353	}
	354	#else
	355	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	356	off_t offset, unsigned int flags)
	357	{
	358	errno = ENOSYS;
	359	return -1;
	360	}
	361	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	362	off_t offset, unsigned int flags)
	363	{
	364	errno = ENOSYS;
	365	return -1;
	366	}
	367	#endif /* __NR_preadv2 */
	368	#endif /* CONFIG_PWRITEV2 */
	369
0cfe2089 TK	370	static inline int shm_attach_to_open_removed(void)
	371	{
	372	return 1;
	373	}
	374
2c3e17be SW	375	#ifdef CONFIG_LINUX_FALLOCATE
	376	#define FIO_HAVE_NATIVE_FALLOCATE
	377	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	378	uint64_t len)
	379	{
	380	int ret;
e69dfc2b	381	ret = fallocate(f->fd, 0, offset, len);
2c3e17be SW	382	if (ret == 0)
	383	return true;
	384
	385	/* Work around buggy old glibc versions... */
	386	if (ret > 0)
	387	errno = ret;
	388
	389	return false;
	390	}
	391	#endif
	392
58828d07 SW	393	#define FIO_HAVE_CPU_HAS
	394	static inline bool os_cpu_has(cpu_features feature)
	395	{
	396	bool have_feature;
	397	unsigned long fio_unused hwcap;
	398
	399	switch (feature) {
	400	#ifdef ARCH_HAVE_CRC_CRYPTO
	401	case CPU_ARM64_CRC32C:
	402	hwcap = getauxval(AT_HWCAP);
	403	have_feature = (hwcap & HWCAP_CRC32) != 0;
	404	break;
	405	#endif
	406	default:
	407	have_feature = false;
	408	}
	409
	410	return have_feature;
	411	}
	412
ebac4655	413	#endif