[fio.git] / os / os-linux.h

#ifndef FIO_OS_LINUX_H
#define FIO_OS_LINUX_H

#include <sys/ioctl.h>
#include <sys/uio.h>
#include <sys/syscall.h>
#include <sys/vfs.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sched.h>
#include <linux/unistd.h>
#include <linux/raw.h>
#include <linux/major.h>

#include "indirect.h"
#include "binject.h"
#include "../file.h"

#define FIO_HAVE_LIBAIO
#define FIO_HAVE_POSIXAIO
#define FIO_HAVE_FADVISE
#define FIO_HAVE_CPU_AFFINITY
#define FIO_HAVE_DISK_UTIL
#define FIO_HAVE_SGIO
#define FIO_HAVE_IOPRIO
#define FIO_HAVE_SPLICE
#define FIO_HAVE_IOSCHED_SWITCH
#define FIO_HAVE_ODIRECT
#define FIO_HAVE_HUGETLB
#define FIO_HAVE_RAWBIND
#define FIO_HAVE_BLKTRACE
#define FIO_HAVE_STRSEP
#define FIO_HAVE_FALLOCATE
#define FIO_HAVE_POSIXAIO_FSYNC
#define FIO_HAVE_PSHARED_MUTEX
#define FIO_HAVE_CL_SIZE
#define FIO_HAVE_CGROUPS
#define FIO_HAVE_FDATASYNC
#define FIO_HAVE_FS_STAT
#define FIO_HAVE_TRIM
#define FIO_HAVE_BINJECT
#define FIO_HAVE_CLOCK_MONOTONIC

#ifdef SYNC_FILE_RANGE_WAIT_BEFORE
#define FIO_HAVE_SYNC_FILE_RANGE
#endif

#define OS_MAP_ANON		MAP_ANONYMOUS

#ifndef CLOCK_MONOTONIC
#define CLOCK_MONOTONIC 1
#endif

typedef cpu_set_t os_cpu_mask_t;

typedef struct drand48_data os_random_state_t;

/*
 * we want fadvise64 really, but it's so tangled... later
 */
#ifdef FIO_HAVE_FADVISE
#define fadvise(fd, off, len, advice)	\
	posix_fadvise((fd), (off_t)(off), (len), (advice))
#endif

/*
 * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want
 * the affinity helpers to work.
 */
#ifndef GLIBC_2_3_2
#define fio_setaffinity(pid, cpumask)		\
	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
#define fio_getaffinity(pid, ptr)	\
	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
#else
#define fio_setaffinity(pid, cpumask)	\
	sched_setaffinity((pid), &(cpumask))
#define fio_getaffinity(pid, ptr)	\
	sched_getaffinity((pid), (ptr))
#endif

#define fio_cpu_clear(mask, cpu)	CPU_CLR((cpu), (mask))
#define fio_cpu_set(mask, cpu)		CPU_SET((cpu), (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

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

/*
 * Just check for SPLICE_F_MOVE, if that isn't there, assume the others
 * aren't either.
 */
#ifndef SPLICE_F_MOVE
#define SPLICE_F_MOVE	(0x01)	/* move pages instead of copying */
#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
				 /* we may still block on the fd we splice */
				 /* from/to, of course */
#define SPLICE_F_MORE	(0x04)	/* expect more data */
#define SPLICE_F_GIFT   (0x08)  /* pages passed in are a gift */

static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
			 size_t len, unsigned int flags)
{
	return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
}

static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
{
	return syscall(__NR_sys_tee, fdin, fdout, len, flags);
}

static inline int vmsplice(int fd, const struct iovec *iov,
			   unsigned long nr_segs, unsigned int flags)
{
	return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
}
#endif

#define SPLICE_DEF_SIZE	(64*1024)

#ifdef FIO_HAVE_SYSLET

struct syslet_uatom;
struct async_head_user;

/*
 * syslet stuff
 */
static inline struct syslet_uatom *
async_exec(struct syslet_uatom *atom, struct async_head_user *ahu)
{
	return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu);
}

static inline long
async_wait(unsigned long min_wait_events, unsigned long user_ring_idx,
	   struct async_head_user *ahu)
{
	return syscall(__NR_async_wait, min_wait_events,
			user_ring_idx, ahu);
}

static inline long async_thread(void *event, struct async_head_user *ahu)
{
	return syscall(__NR_async_thread, event, ahu);
}

static inline long umem_add(unsigned long *uptr, unsigned long inc)
{
	return syscall(__NR_umem_add, uptr, inc);
}
#endif /* FIO_HAVE_SYSLET */

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

#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;
}

static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
{
	srand48_r(seed, rs);
}

static inline long os_random_long(os_random_state_t *rs)
{
	long val;

	lrand48_r(rs, &val);
	return val;
}

static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
{
	struct raw_config_request rq;
	int fd;

	if (major(dev) != RAW_MAJOR)
		return 1;

	/*
	 * we should be able to find /dev/rawctl or /dev/raw/rawctl
	 */
	fd = open("/dev/rawctl", O_RDONLY);
	if (fd < 0) {
		fd = open("/dev/raw/rawctl", O_RDONLY);
		if (fd < 0)
			return 1;
	}

	rq.raw_minor = minor(dev);
	if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
		close(fd);
		return 1;
	}

	close(fd);
	*majdev = rq.block_major;
	*mindev = rq.block_minor;
	return 0;
}

#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

#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_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(int fd, unsigned long long start,
			  unsigned long long len)
{
	uint64_t range[2];

	range[0] = start;
	range[1] = len;

	if (!ioctl(fd, BLKDISCARD, range))
		return 0;

	return errno;
}

#endif
Commit	Line	Data
	1	#ifndef FIO_OS_LINUX_H
	2	#define FIO_OS_LINUX_H
	3
	4	#include <sys/ioctl.h>
	5	#include <sys/uio.h>
	6	#include <sys/syscall.h>
	7	#include <sys/vfs.h>
	8	#include <unistd.h>
	9	#include <fcntl.h>
	10	#include <errno.h>
	11	#include <sched.h>
	12	#include <linux/unistd.h>
	13	#include <linux/raw.h>
	14	#include <linux/major.h>
	15
	16	#include "indirect.h"
	17	#include "binject.h"
	18	#include "../file.h"
	19
	20	#define FIO_HAVE_LIBAIO
	21	#define FIO_HAVE_POSIXAIO
	22	#define FIO_HAVE_FADVISE
	23	#define FIO_HAVE_CPU_AFFINITY
	24	#define FIO_HAVE_DISK_UTIL
	25	#define FIO_HAVE_SGIO
	26	#define FIO_HAVE_IOPRIO
	27	#define FIO_HAVE_SPLICE
	28	#define FIO_HAVE_IOSCHED_SWITCH
	29	#define FIO_HAVE_ODIRECT
	30	#define FIO_HAVE_HUGETLB
	31	#define FIO_HAVE_RAWBIND
	32	#define FIO_HAVE_BLKTRACE
	33	#define FIO_HAVE_STRSEP
	34	#define FIO_HAVE_FALLOCATE
	35	#define FIO_HAVE_POSIXAIO_FSYNC
	36	#define FIO_HAVE_PSHARED_MUTEX
	37	#define FIO_HAVE_CL_SIZE
	38	#define FIO_HAVE_CGROUPS
	39	#define FIO_HAVE_FDATASYNC
	40	#define FIO_HAVE_FS_STAT
	41	#define FIO_HAVE_TRIM
	42	#define FIO_HAVE_BINJECT
	43	#define FIO_HAVE_CLOCK_MONOTONIC
	44
	45	#ifdef SYNC_FILE_RANGE_WAIT_BEFORE
	46	#define FIO_HAVE_SYNC_FILE_RANGE
	47	#endif
	48
	49	#define OS_MAP_ANON MAP_ANONYMOUS
	50
	51	#ifndef CLOCK_MONOTONIC
	52	#define CLOCK_MONOTONIC 1
	53	#endif
	54
	55	typedef cpu_set_t os_cpu_mask_t;
	56
	57	typedef struct drand48_data os_random_state_t;
	58
	59	/*
	60	* we want fadvise64 really, but it's so tangled... later
	61	*/
	62	#ifdef FIO_HAVE_FADVISE
	63	#define fadvise(fd, off, len, advice) \
	64	posix_fadvise((fd), (off_t)(off), (len), (advice))
	65	#endif
	66
	67	/*
	68	* If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want
	69	* the affinity helpers to work.
	70	*/
	71	#ifndef GLIBC_2_3_2
	72	#define fio_setaffinity(pid, cpumask) \
	73	sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
	74	#define fio_getaffinity(pid, ptr) \
	75	sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
	76	#else
	77	#define fio_setaffinity(pid, cpumask) \
	78	sched_setaffinity((pid), &(cpumask))
	79	#define fio_getaffinity(pid, ptr) \
	80	sched_getaffinity((pid), (ptr))
	81	#endif
	82
	83	#define fio_cpu_clear(mask, cpu) CPU_CLR((cpu), (mask))
	84	#define fio_cpu_set(mask, cpu) CPU_SET((cpu), (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	static inline int ioprio_set(int which, int who, int ioprio)
	100	{
	101	return syscall(__NR_ioprio_set, which, who, ioprio);
	102	}
	103
	104	/*
	105	* Just check for SPLICE_F_MOVE, if that isn't there, assume the others
	106	* aren't either.
	107	*/
	108	#ifndef SPLICE_F_MOVE
	109	#define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
	110	#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
	111	/* we may still block on the fd we splice */
	112	/* from/to, of course */
	113	#define SPLICE_F_MORE (0x04) /* expect more data */
	114	#define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
	115
	116	static inline int splice(int fdin, loff_t off_in, int fdout, loff_t off_out,
	117	size_t len, unsigned int flags)
	118	{
	119	return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
	120	}
	121
	122	static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
	123	{
	124	return syscall(__NR_sys_tee, fdin, fdout, len, flags);
	125	}
	126
	127	static inline int vmsplice(int fd, const struct iovec *iov,
	128	unsigned long nr_segs, unsigned int flags)
	129	{
	130	return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
	131	}
	132	#endif
	133
	134	#define SPLICE_DEF_SIZE (64*1024)
	135
	136	#ifdef FIO_HAVE_SYSLET
	137
	138	struct syslet_uatom;
	139	struct async_head_user;
	140
	141	/*
	142	* syslet stuff
	143	*/
	144	static inline struct syslet_uatom *
	145	async_exec(struct syslet_uatom atom, struct async_head_user ahu)
	146	{
	147	return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu);
	148	}
	149
	150	static inline long
	151	async_wait(unsigned long min_wait_events, unsigned long user_ring_idx,
	152	struct async_head_user *ahu)
	153	{
	154	return syscall(__NR_async_wait, min_wait_events,
	155	user_ring_idx, ahu);
	156	}
	157
	158	static inline long async_thread(void event, struct async_head_user ahu)
	159	{
	160	return syscall(__NR_async_thread, event, ahu);
	161	}
	162
	163	static inline long umem_add(unsigned long *uptr, unsigned long inc)
	164	{
	165	return syscall(__NR_umem_add, uptr, inc);
	166	}
	167	#endif /* FIO_HAVE_SYSLET */
	168
	169	enum {
	170	IOPRIO_CLASS_NONE,
	171	IOPRIO_CLASS_RT,
	172	IOPRIO_CLASS_BE,
	173	IOPRIO_CLASS_IDLE,
	174	};
	175
	176	enum {
	177	IOPRIO_WHO_PROCESS = 1,
	178	IOPRIO_WHO_PGRP,
	179	IOPRIO_WHO_USER,
	180	};
	181
	182	#define IOPRIO_BITS 16
	183	#define IOPRIO_CLASS_SHIFT 13
	184
	185	#ifndef BLKGETSIZE64
	186	#define BLKGETSIZE64 _IOR(0x12,114,size_t)
	187	#endif
	188
	189	#ifndef BLKFLSBUF
	190	#define BLKFLSBUF _IO(0x12,97)
	191	#endif
	192
	193	#ifndef BLKDISCARD
	194	#define BLKDISCARD _IO(0x12,119)
	195	#endif
	196
	197	static inline int blockdev_invalidate_cache(struct fio_file *f)
	198	{
	199	return ioctl(f->fd, BLKFLSBUF);
	200	}
	201
	202	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
	203	{
	204	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
	205	return 0;
	206
	207	return errno;
	208	}
	209
	210	static inline unsigned long long os_phys_mem(void)
	211	{
	212	long pagesize, pages;
	213
	214	pagesize = sysconf(_SC_PAGESIZE);
	215	pages = sysconf(_SC_PHYS_PAGES);
	216	if (pages == -1 \|\| pagesize == -1)
	217	return 0;
	218
	219	return (unsigned long long) pages * (unsigned long long) pagesize;
	220	}
	221
	222	static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
	223	{
	224	srand48_r(seed, rs);
	225	}
	226
	227	static inline long os_random_long(os_random_state_t *rs)
	228	{
	229	long val;
	230
	231	lrand48_r(rs, &val);
	232	return val;
	233	}
	234
	235	static inline int fio_lookup_raw(dev_t dev, int majdev, int mindev)
	236	{
	237	struct raw_config_request rq;
	238	int fd;
	239
	240	if (major(dev) != RAW_MAJOR)
	241	return 1;
	242
	243	/*
	244	* we should be able to find /dev/rawctl or /dev/raw/rawctl
	245	*/
	246	fd = open("/dev/rawctl", O_RDONLY);
	247	if (fd < 0) {
	248	fd = open("/dev/raw/rawctl", O_RDONLY);
	249	if (fd < 0)
	250	return 1;
	251	}
	252
	253	rq.raw_minor = minor(dev);
	254	if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
	255	close(fd);
	256	return 1;
	257	}
	258
	259	close(fd);
	260	*majdev = rq.block_major;
	261	*mindev = rq.block_minor;
	262	return 0;
	263	}
	264
	265	#ifdef O_NOATIME
	266	#define FIO_O_NOATIME O_NOATIME
	267	#else
	268	#define FIO_O_NOATIME 0
	269	#endif
	270
	271	#ifdef MADV_REMOVE
	272	#define FIO_MADV_FREE MADV_REMOVE
	273	#endif
	274
	275	#define CACHE_LINE_FILE \
	276	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
	277
	278	static inline int arch_cache_line_size(void)
	279	{
	280	char size[32];
	281	int fd, ret;
	282
	283	fd = open(CACHE_LINE_FILE, O_RDONLY);
	284	if (fd < 0)
	285	return -1;
	286
	287	ret = read(fd, size, sizeof(size));
	288
	289	close(fd);
	290
	291	if (ret <= 0)
	292	return -1;
	293	else
	294	return atoi(size);
	295	}
	296
	297	static inline unsigned long long get_fs_size(const char *path)
	298	{
	299	unsigned long long ret;
	300	struct statfs s;
	301
	302	if (statfs(path, &s) < 0)
	303	return -1ULL;
	304
	305	ret = s.f_bsize;
	306	ret *= (unsigned long long) s.f_bfree;
	307	return ret;
	308	}
	309
	310	static inline int os_trim(int fd, unsigned long long start,
	311	unsigned long long len)
	312	{
	313	uint64_t range[2];
	314
	315	range[0] = start;
	316	range[1] = len;
	317
	318	if (!ioctl(fd, BLKDISCARD, range))
	319	return 0;
	320
	321	return errno;
	322	}
	323
	324	#endif