[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>
#include <asm/byteorder.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_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_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
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>
e69d8385	20	#include <asm/byteorder.h>
ebac4655	21
58828d07 SW	22	#ifdef ARCH_HAVE_CRC_CRYPTO
58828d07 SW	23	#include <sys/auxv.h>
3721c7fe SW	24	#ifndef HWCAP_PMULL
	25	#define HWCAP_PMULL (1 << 4)
	26	#endif /* HWCAP_PMULL */
58828d07 SW	27	#ifndef HWCAP_CRC32
	28	#define HWCAP_CRC32 (1 << 7)
	29	#endif /* HWCAP_CRC32 */
	30	#endif /* ARCH_HAVE_CRC_CRYPTO */
	31
1c764dbe	32	#include "./os-linux-syscall.h"
e2e58886	33	#include "../file.h"
f3de88a7	34
7922a7b7 OM	35	#ifndef __has_builtin // Optional of course.
	36	#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
	37	#endif
	38
ebac4655 JA	39	#define FIO_HAVE_CPU_AFFINITY
	40	#define FIO_HAVE_DISK_UTIL
	41	#define FIO_HAVE_SGIO
ba4f8923	42	#define FIO_HAVE_IOPRIO
32ef447a	43	#define FIO_HAVE_IOPRIO_CLASS
22f78b32	44	#define FIO_HAVE_IOSCHED_SWITCH
2c0ecd28	45	#define FIO_HAVE_ODIRECT
74b025b0	46	#define FIO_HAVE_HUGETLB
5e62c22a	47	#define FIO_HAVE_BLKTRACE
eb7ccf38	48	#define FIO_HAVE_CL_SIZE
a696fa2a	49	#define FIO_HAVE_CGROUPS
2e3bd4c2	50	#define FIO_HAVE_FS_STAT
a5f3027c	51	#define FIO_HAVE_TRIM
47f767c1	52	#define FIO_HAVE_GETTID
93bcfd20	53	#define FIO_USE_GENERIC_INIT_RANDOM_STATE
e69d8385	54	#define FIO_HAVE_BYTEORDER_FUNCS
6562685f	55	#define FIO_HAVE_PWRITEV2
97900ebf	56	#define FIO_HAVE_SHM_ATTACH_REMOVED
b6959b55	57
39b93568 JA	58	#ifdef MAP_HUGETLB
	59	#define FIO_HAVE_MMAP_HUGE
	60	#endif
	61
dc873b6f	62	#define OS_MAP_ANON MAP_ANONYMOUS
ebac4655	63
4db9ac71	64	#define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
5a8a6a03	65
ebac4655	66	typedef cpu_set_t os_cpu_mask_t;
4e78e405	67
67bf9823	68	#ifdef CONFIG_3ARG_AFFINITY
e8462bd8 JA	69	#define fio_setaffinity(pid, cpumask) \
e8462bd8 JA	70	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
ebac4655 JA	71	#define fio_getaffinity(pid, ptr) \
ebac4655 JA	72	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
67bf9823	73	#elif defined(CONFIG_2ARG_AFFINITY)
e8462bd8 JA	74	#define fio_setaffinity(pid, cpumask) \
e8462bd8 JA	75	sched_setaffinity((pid), &(cpumask))
c8f025f8 JA	76	#define fio_getaffinity(pid, ptr) \
	77	sched_getaffinity((pid), (ptr))
	78	#endif
be4ecfdf	79
e9d2a04d TK	80	#ifdef CONFIG_PTHREAD_GETAFFINITY
e9d2a04d TK	81	#define FIO_HAVE_GET_THREAD_AFFINITY
874d55e5 JA	82	#define fio_get_thread_affinity(mask) \
874d55e5 JA	83	pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
e9d2a04d	84	#endif
874d55e5	85
6e0cefdc BVA	86	#define fio_cpu_clear(mask, cpu) CPU_CLR((cpu), (mask))
6e0cefdc BVA	87	#define fio_cpu_set(mask, cpu) CPU_SET((cpu), (mask))
52fd65f4	88	#define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
d004a209	89	#define fio_cpu_count(mask) CPU_COUNT((mask))
d2ce18b5 JA	90
	91	static inline int fio_cpuset_init(os_cpu_mask_t *mask)
	92	{
	93	CPU_ZERO(mask);
	94	return 0;
	95	}
	96
	97	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	98	{
	99	return 0;
	100	}
6d459ee7 JA	101
6d459ee7 JA	102	#define FIO_MAX_CPUS CPU_SETSIZE
4d8947de	103
28727df7 JA	104	enum {
	105	IOPRIO_CLASS_NONE,
	106	IOPRIO_CLASS_RT,
	107	IOPRIO_CLASS_BE,
	108	IOPRIO_CLASS_IDLE,
	109	};
	110
	111	enum {
	112	IOPRIO_WHO_PROCESS = 1,
	113	IOPRIO_WHO_PGRP,
	114	IOPRIO_WHO_USER,
	115	};
	116
	117	#define IOPRIO_BITS 16
	118	#define IOPRIO_CLASS_SHIFT 13
	119
1767bd34 TK	120	#define IOPRIO_MIN_PRIO 0 /* highest priority */
	121	#define IOPRIO_MAX_PRIO 7 /* lowest priority */
	122
	123	#define IOPRIO_MIN_PRIO_CLASS 0
	124	#define IOPRIO_MAX_PRIO_CLASS 3
	125
8d6e8d99	126	static inline int ioprio_value(int ioprio_class, int ioprio)
ebac4655	127	{
28727df7 JA	128	/*
	129	* If no class is set, assume BE
	130	*/
8d6e8d99 DLM	131	if (!ioprio_class)
	132	ioprio_class = IOPRIO_CLASS_BE;
	133
	134	return (ioprio_class << IOPRIO_CLASS_SHIFT) \| ioprio;
	135	}
28727df7	136
03ec570f DLM	137	static inline bool ioprio_value_is_class_rt(unsigned int priority)
	138	{
	139	return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
	140	}
	141
8d6e8d99 DLM	142	static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
	143	{
	144	return syscall(__NR_ioprio_set, which, who,
	145	ioprio_value(ioprio_class, ioprio));
ebac4655 JA	146	}
ebac4655 JA	147
de5ed0e4	148	#ifndef CONFIG_HAVE_GETTID
47f767c1 JA	149	static inline int gettid(void)
	150	{
	151	return syscall(__NR_gettid);
	152	}
de5ed0e4	153	#endif
47f767c1	154
3feedc60 JA	155	#define SPLICE_DEF_SIZE (64*1024)
3feedc60 JA	156
ebac4655 JA	157	#ifndef BLKGETSIZE64
	158	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	159	#endif
	160
e5b401d4 JA	161	#ifndef BLKFLSBUF
	162	#define BLKFLSBUF _IO(0x12,97)
	163	#endif
	164
a5f3027c JA	165	#ifndef BLKDISCARD
	166	#define BLKDISCARD _IO(0x12,119)
	167	#endif
	168
e2e58886	169	static inline int blockdev_invalidate_cache(struct fio_file *f)
e5b401d4	170	{
ecc314ba	171	return ioctl(f->fd, BLKFLSBUF);
e5b401d4 JA	172	}
e5b401d4 JA	173
ecc314ba	174	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
ebac4655	175	{
ecc314ba	176	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
ebac4655 JA	177	return 0;
	178
	179	return errno;
	180	}
	181
32cd46a0 JA	182	static inline unsigned long long os_phys_mem(void)
	183	{
	184	long pagesize, pages;
	185
	186	pagesize = sysconf(_SC_PAGESIZE);
	187	pages = sysconf(_SC_PHYS_PAGES);
	188	if (pages == -1 \|\| pagesize == -1)
	189	return 0;
	190
	191	return (unsigned long long) pages * (unsigned long long) pagesize;
	192	}
	193
5b6f5c66	194	#ifdef O_NOATIME
5921e80c	195	#define FIO_O_NOATIME O_NOATIME
5b6f5c66 JA	196	#else
	197	#define FIO_O_NOATIME 0
	198	#endif
5921e80c	199
d01612f3 CM	200	#ifdef O_ATOMIC
	201	#define OS_O_ATOMIC O_ATOMIC
	202	#else
	203	#define OS_O_ATOMIC 040000000
	204	#endif
	205
a1c58075 JA	206	#ifdef MADV_REMOVE
	207	#define FIO_MADV_FREE MADV_REMOVE
	208	#endif
	209
7922a7b7 OM	210	/* Check for GCC or Clang byte swap intrinsics */
	211	#if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
	212	&& __has_builtin(__builtin_bswap64)) \|\| (__GNUC__ > 4 \
	213	\|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
df73aab1	214	#define fio_swap16(x) __builtin_bswap16(x)
df73aab1	215	#define fio_swap32(x) __builtin_bswap32(x)
df73aab1 JA	216	#define fio_swap64(x) __builtin_bswap64(x)
df73aab1 JA	217	#else
7922a7b7 OM	218	#include <byteswap.h>
	219	#define fio_swap16(x) bswap_16(x)
	220	#define fio_swap32(x) bswap_32(x)
	221	#define fio_swap64(x) bswap_64(x)
	222	#endif /* fio_swapN */
ff245192	223
eb7ccf38 JA	224	#define CACHE_LINE_FILE \
	225	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	226
	227	static inline int arch_cache_line_size(void)
	228	{
	229	char size[32];
	230	int fd, ret;
	231
	232	fd = open(CACHE_LINE_FILE, O_RDONLY);
	233	if (fd < 0)
	234	return -1;
	235
	236	ret = read(fd, size, sizeof(size));
ec76f15a JA	237
	238	close(fd);
	239
eb7ccf38 JA	240	if (ret <= 0)
eb7ccf38 JA	241	return -1;
ec76f15a JA	242	else
ec76f15a JA	243	return atoi(size);
eb7ccf38 JA	244	}
eb7ccf38 JA	245
d1419c4f TK	246	#ifdef __powerpc64__
	247	#define FIO_HAVE_CPU_ONLINE_SYSCONF
	248	static inline unsigned int cpus_online(void)
	249	{
	250	return sysconf(_SC_NPROCESSORS_CONF);
	251	}
	252	#endif
	253
c08ad04c	254	static inline unsigned long long get_fs_free_size(const char *path)
2e3bd4c2 JA	255	{
	256	unsigned long long ret;
	257	struct statfs s;
	258
	259	if (statfs(path, &s) < 0)
	260	return -1ULL;
	261
	262	ret = s.f_bsize;
	263	ret *= (unsigned long long) s.f_bfree;
	264	return ret;
	265	}
	266
496b1f9e	267	static inline int os_trim(struct fio_file *f, unsigned long long start,
a5f3027c JA	268	unsigned long long len)
	269	{
	270	uint64_t range[2];
	271
	272	range[0] = start;
	273	range[1] = len;
	274
496b1f9e	275	if (!ioctl(f->fd, BLKDISCARD, range))
a5f3027c JA	276	return 0;
	277
	278	return errno;
	279	}
	280
7e09a9f1	281	#ifdef CONFIG_SCHED_IDLE
f2a2ce0e HL	282	static inline int fio_set_sched_idle(void)
	283	{
	284	struct sched_param p = { .sched_priority = 0, };
	285	return sched_setscheduler(gettid(), SCHED_IDLE, &p);
	286	}
7e09a9f1	287	#endif
f2a2ce0e	288
ae8e559e JA	289	#ifndef F_GET_RW_HINT
	290	#ifndef F_LINUX_SPECIFIC_BASE
	291	#define F_LINUX_SPECIFIC_BASE 1024
	292	#endif
	293	#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
	294	#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
bd553af6 JA	295	#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
bd553af6 JA	296	#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
ae8e559e JA	297	#endif
	298
	299	#ifndef RWH_WRITE_LIFE_NONE
bd553af6 JA	300	#define RWH_WRITE_LIFE_NOT_SET 0
	301	#define RWH_WRITE_LIFE_NONE 1
	302	#define RWH_WRITE_LIFE_SHORT 2
	303	#define RWH_WRITE_LIFE_MEDIUM 3
	304	#define RWH_WRITE_LIFE_LONG 4
	305	#define RWH_WRITE_LIFE_EXTREME 5
37659335 JA	306	#endif
37659335 JA	307
ae8e559e	308	#define FIO_HAVE_WRITE_HINT
37659335	309
6562685f JA	310	#ifndef RWF_HIPRI
	311	#define RWF_HIPRI 0x00000001
	312	#endif
	313	#ifndef RWF_DSYNC
	314	#define RWF_DSYNC 0x00000002
	315	#endif
	316	#ifndef RWF_SYNC
	317	#define RWF_SYNC 0x00000004
	318	#endif
7d42e66e KK	319	#ifndef RWF_NOWAIT
	320	#define RWF_NOWAIT 0x00000008
	321	#endif
6562685f	322
4a87b584	323	#ifndef RWF_UNCACHED
8beee62d	324	#define RWF_UNCACHED 0x00000040
4a87b584 JA	325	#endif
4a87b584 JA	326
72cd4146 JA	327	#ifndef RWF_WRITE_LIFE_SHIFT
	328	#define RWF_WRITE_LIFE_SHIFT 4
	329	#define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
	330	#define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
	331	#define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
	332	#define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
	333	#endif
	334
6562685f JA	335	#ifndef CONFIG_PWRITEV2
	336	#ifdef __NR_preadv2
	337	static inline void make_pos_h_l(unsigned long pos_h, unsigned long pos_l,
	338	off_t offset)
	339	{
7b5c648f	340	#if BITS_PER_LONG == 64
7b5c648f JA	341	*pos_l = offset;
	342	*pos_h = 0;
	343	#else
6562685f JA	344	*pos_l = offset & 0xffffffff;
6562685f JA	345	*pos_h = ((uint64_t) offset) >> 32;
7b5c648f	346	#endif
6562685f JA	347	}
	348	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	349	off_t offset, unsigned int flags)
	350	{
	351	unsigned long pos_l, pos_h;
	352
	353	make_pos_h_l(&pos_h, &pos_l, offset);
	354	return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
	355	}
	356	static inline ssize_t pwritev2(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_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
	363	}
	364	#else
	365	static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
	366	off_t offset, unsigned int flags)
	367	{
	368	errno = ENOSYS;
	369	return -1;
	370	}
	371	static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
	372	off_t offset, unsigned int flags)
	373	{
	374	errno = ENOSYS;
	375	return -1;
	376	}
	377	#endif /* __NR_preadv2 */
	378	#endif /* CONFIG_PWRITEV2 */
	379
0cfe2089 TK	380	static inline int shm_attach_to_open_removed(void)
	381	{
	382	return 1;
	383	}
	384
2c3e17be SW	385	#ifdef CONFIG_LINUX_FALLOCATE
	386	#define FIO_HAVE_NATIVE_FALLOCATE
	387	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
	388	uint64_t len)
	389	{
	390	int ret;
e69dfc2b	391	ret = fallocate(f->fd, 0, offset, len);
2c3e17be SW	392	if (ret == 0)
	393	return true;
	394
	395	/* Work around buggy old glibc versions... */
	396	if (ret > 0)
	397	errno = ret;
	398
	399	return false;
	400	}
	401	#endif
	402
58828d07 SW	403	#define FIO_HAVE_CPU_HAS
	404	static inline bool os_cpu_has(cpu_features feature)
	405	{
	406	bool have_feature;
	407	unsigned long fio_unused hwcap;
	408
	409	switch (feature) {
	410	#ifdef ARCH_HAVE_CRC_CRYPTO
	411	case CPU_ARM64_CRC32C:
	412	hwcap = getauxval(AT_HWCAP);
3721c7fe SW	413	have_feature = (hwcap & (HWCAP_PMULL \| HWCAP_CRC32)) ==
3721c7fe SW	414	(HWCAP_PMULL \| HWCAP_CRC32);
58828d07 SW	415	break;
	416	#endif
	417	default:
	418	have_feature = false;
	419	}
	420
	421	return have_feature;
	422	}
	423
ebac4655	424	#endif