4 #define FIO_OS os_linux
8 #include <sys/syscall.h>
9 #include <sys/sysmacros.h>
16 #include <linux/unistd.h>
17 #include <linux/raw.h>
18 #include <linux/major.h>
22 #ifdef ARCH_HAVE_CRC_CRYPTO
25 #define HWCAP_CRC32 (1 << 7)
26 #endif /* HWCAP_CRC32 */
27 #endif /* ARCH_HAVE_CRC_CRYPTO */
29 #include "./os-linux-syscall.h"
32 #ifndef __has_builtin // Optional of course.
33 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
36 #define FIO_HAVE_CPU_AFFINITY
37 #define FIO_HAVE_DISK_UTIL
39 #define FIO_HAVE_IOPRIO
40 #define FIO_HAVE_IOPRIO_CLASS
41 #define FIO_HAVE_IOSCHED_SWITCH
42 #define FIO_HAVE_ODIRECT
43 #define FIO_HAVE_HUGETLB
44 #define FIO_HAVE_RAWBIND
45 #define FIO_HAVE_BLKTRACE
46 #define FIO_HAVE_CL_SIZE
47 #define FIO_HAVE_CGROUPS
48 #define FIO_HAVE_FS_STAT
50 #define FIO_HAVE_GETTID
51 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
52 #define FIO_HAVE_PWRITEV2
53 #define FIO_HAVE_SHM_ATTACH_REMOVED
56 #define FIO_HAVE_MMAP_HUGE
59 #define OS_MAP_ANON MAP_ANONYMOUS
61 #define FIO_EXT_ENG_DIR "/usr/lib/fio"
63 typedef cpu_set_t os_cpu_mask_t;
65 #ifdef CONFIG_3ARG_AFFINITY
66 #define fio_setaffinity(pid, cpumask) \
67 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
68 #define fio_getaffinity(pid, ptr) \
69 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
70 #elif defined(CONFIG_2ARG_AFFINITY)
71 #define fio_setaffinity(pid, cpumask) \
72 sched_setaffinity((pid), &(cpumask))
73 #define fio_getaffinity(pid, ptr) \
74 sched_getaffinity((pid), (ptr))
77 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
78 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
79 #define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
80 #define fio_cpu_count(mask) CPU_COUNT((mask))
82 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
88 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
93 #define FIO_MAX_CPUS CPU_SETSIZE
103 IOPRIO_WHO_PROCESS = 1,
108 #define IOPRIO_BITS 16
109 #define IOPRIO_CLASS_SHIFT 13
111 #define IOPRIO_MIN_PRIO 0 /* highest priority */
112 #define IOPRIO_MAX_PRIO 7 /* lowest priority */
114 #define IOPRIO_MIN_PRIO_CLASS 0
115 #define IOPRIO_MAX_PRIO_CLASS 3
117 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
120 * If no class is set, assume BE
123 ioprio_class = IOPRIO_CLASS_BE;
125 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
126 return syscall(__NR_ioprio_set, which, who, ioprio);
129 #ifndef CONFIG_HAVE_GETTID
130 static inline int gettid(void)
132 return syscall(__NR_gettid);
136 #define SPLICE_DEF_SIZE (64*1024)
139 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
143 #define BLKFLSBUF _IO(0x12,97)
147 #define BLKDISCARD _IO(0x12,119)
150 static inline int blockdev_invalidate_cache(struct fio_file *f)
152 return ioctl(f->fd, BLKFLSBUF);
155 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
157 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
163 static inline unsigned long long os_phys_mem(void)
165 long pagesize, pages;
167 pagesize = sysconf(_SC_PAGESIZE);
168 pages = sysconf(_SC_PHYS_PAGES);
169 if (pages == -1 || pagesize == -1)
172 return (unsigned long long) pages * (unsigned long long) pagesize;
175 static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
177 struct raw_config_request rq;
180 if (major(dev) != RAW_MAJOR)
184 * we should be able to find /dev/rawctl or /dev/raw/rawctl
186 fd = open("/dev/rawctl", O_RDONLY);
188 fd = open("/dev/raw/rawctl", O_RDONLY);
193 rq.raw_minor = minor(dev);
194 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
200 *majdev = rq.block_major;
201 *mindev = rq.block_minor;
206 #define FIO_O_NOATIME O_NOATIME
208 #define FIO_O_NOATIME 0
212 #define OS_O_ATOMIC O_ATOMIC
214 #define OS_O_ATOMIC 040000000
218 #define FIO_MADV_FREE MADV_REMOVE
221 /* Check for GCC or Clang byte swap intrinsics */
222 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
223 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
224 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
225 #define fio_swap16(x) __builtin_bswap16(x)
226 #define fio_swap32(x) __builtin_bswap32(x)
227 #define fio_swap64(x) __builtin_bswap64(x)
229 #include <byteswap.h>
230 #define fio_swap16(x) bswap_16(x)
231 #define fio_swap32(x) bswap_32(x)
232 #define fio_swap64(x) bswap_64(x)
233 #endif /* fio_swapN */
235 #define CACHE_LINE_FILE \
236 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
238 static inline int arch_cache_line_size(void)
243 fd = open(CACHE_LINE_FILE, O_RDONLY);
247 ret = read(fd, size, sizeof(size));
258 #define FIO_HAVE_CPU_ONLINE_SYSCONF
259 static inline unsigned int cpus_online(void)
261 return sysconf(_SC_NPROCESSORS_CONF);
265 static inline unsigned long long get_fs_free_size(const char *path)
267 unsigned long long ret;
270 if (statfs(path, &s) < 0)
274 ret *= (unsigned long long) s.f_bfree;
278 static inline int os_trim(struct fio_file *f, unsigned long long start,
279 unsigned long long len)
286 if (!ioctl(f->fd, BLKDISCARD, range))
292 #ifdef CONFIG_SCHED_IDLE
293 static inline int fio_set_sched_idle(void)
295 struct sched_param p = { .sched_priority = 0, };
296 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
300 #ifndef F_GET_RW_HINT
301 #ifndef F_LINUX_SPECIFIC_BASE
302 #define F_LINUX_SPECIFIC_BASE 1024
304 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
305 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
306 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
307 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
310 #ifndef RWH_WRITE_LIFE_NONE
311 #define RWH_WRITE_LIFE_NOT_SET 0
312 #define RWH_WRITE_LIFE_NONE 1
313 #define RWH_WRITE_LIFE_SHORT 2
314 #define RWH_WRITE_LIFE_MEDIUM 3
315 #define RWH_WRITE_LIFE_LONG 4
316 #define RWH_WRITE_LIFE_EXTREME 5
319 #define FIO_HAVE_WRITE_HINT
322 #define RWF_HIPRI 0x00000001
325 #define RWF_DSYNC 0x00000002
328 #define RWF_SYNC 0x00000004
331 #define RWF_NOWAIT 0x00000008
335 #define RWF_UNCACHED 0x00000040
338 #ifndef RWF_WRITE_LIFE_SHIFT
339 #define RWF_WRITE_LIFE_SHIFT 4
340 #define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
341 #define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
342 #define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
343 #define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
346 #ifndef CONFIG_PWRITEV2
348 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
351 #if BITS_PER_LONG == 64
355 *pos_l = offset & 0xffffffff;
356 *pos_h = ((uint64_t) offset) >> 32;
359 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
360 off_t offset, unsigned int flags)
362 unsigned long pos_l, pos_h;
364 make_pos_h_l(&pos_h, &pos_l, offset);
365 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
367 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
368 off_t offset, unsigned int flags)
370 unsigned long pos_l, pos_h;
372 make_pos_h_l(&pos_h, &pos_l, offset);
373 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
376 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
377 off_t offset, unsigned int flags)
382 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
383 off_t offset, unsigned int flags)
388 #endif /* __NR_preadv2 */
389 #endif /* CONFIG_PWRITEV2 */
391 static inline int shm_attach_to_open_removed(void)
396 #ifdef CONFIG_LINUX_FALLOCATE
397 #define FIO_HAVE_NATIVE_FALLOCATE
398 static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
402 ret = fallocate(f->fd, 0, offset, len);
406 /* Work around buggy old glibc versions... */
414 #define FIO_HAVE_CPU_HAS
415 static inline bool os_cpu_has(cpu_features feature)
418 unsigned long fio_unused hwcap;
421 #ifdef ARCH_HAVE_CRC_CRYPTO
422 case CPU_ARM64_CRC32C:
423 hwcap = getauxval(AT_HWCAP);
424 have_feature = (hwcap & HWCAP_CRC32) != 0;
428 have_feature = false;