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"
33 #ifndef __has_builtin // Optional of course.
34 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
37 #define FIO_HAVE_CPU_AFFINITY
38 #define FIO_HAVE_DISK_UTIL
40 #define FIO_HAVE_IOPRIO
41 #define FIO_HAVE_IOPRIO_CLASS
42 #define FIO_HAVE_IOSCHED_SWITCH
43 #define FIO_HAVE_ODIRECT
44 #define FIO_HAVE_HUGETLB
45 #define FIO_HAVE_RAWBIND
46 #define FIO_HAVE_BLKTRACE
47 #define FIO_HAVE_CL_SIZE
48 #define FIO_HAVE_CGROUPS
49 #define FIO_HAVE_FS_STAT
51 #define FIO_HAVE_BINJECT
52 #define FIO_HAVE_GETTID
53 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
54 #define FIO_HAVE_PWRITEV2
55 #define FIO_HAVE_SHM_ATTACH_REMOVED
58 #define FIO_HAVE_MMAP_HUGE
61 #define OS_MAP_ANON MAP_ANONYMOUS
63 typedef cpu_set_t os_cpu_mask_t;
65 typedef struct drand48_data os_random_state_t;
67 #ifdef CONFIG_3ARG_AFFINITY
68 #define fio_setaffinity(pid, cpumask) \
69 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
70 #define fio_getaffinity(pid, ptr) \
71 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
72 #elif defined(CONFIG_2ARG_AFFINITY)
73 #define fio_setaffinity(pid, cpumask) \
74 sched_setaffinity((pid), &(cpumask))
75 #define fio_getaffinity(pid, ptr) \
76 sched_getaffinity((pid), (ptr))
79 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
80 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
81 #define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
82 #define fio_cpu_count(mask) CPU_COUNT((mask))
84 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
90 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
95 #define FIO_MAX_CPUS CPU_SETSIZE
105 IOPRIO_WHO_PROCESS = 1,
110 #define IOPRIO_BITS 16
111 #define IOPRIO_CLASS_SHIFT 13
113 #define IOPRIO_MIN_PRIO 0 /* highest priority */
114 #define IOPRIO_MAX_PRIO 7 /* lowest priority */
116 #define IOPRIO_MIN_PRIO_CLASS 0
117 #define IOPRIO_MAX_PRIO_CLASS 3
119 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
122 * If no class is set, assume BE
125 ioprio_class = IOPRIO_CLASS_BE;
127 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
128 return syscall(__NR_ioprio_set, which, who, ioprio);
131 static inline int gettid(void)
133 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 void os_random_seed(unsigned long seed, os_random_state_t *rs)
180 static inline long os_random_long(os_random_state_t *rs)
188 static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
190 struct raw_config_request rq;
193 if (major(dev) != RAW_MAJOR)
197 * we should be able to find /dev/rawctl or /dev/raw/rawctl
199 fd = open("/dev/rawctl", O_RDONLY);
201 fd = open("/dev/raw/rawctl", O_RDONLY);
206 rq.raw_minor = minor(dev);
207 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
213 *majdev = rq.block_major;
214 *mindev = rq.block_minor;
219 #define FIO_O_NOATIME O_NOATIME
221 #define FIO_O_NOATIME 0
225 #define OS_O_ATOMIC O_ATOMIC
227 #define OS_O_ATOMIC 040000000
231 #define FIO_MADV_FREE MADV_REMOVE
234 /* Check for GCC or Clang byte swap intrinsics */
235 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
236 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
237 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
238 #define fio_swap16(x) __builtin_bswap16(x)
239 #define fio_swap32(x) __builtin_bswap32(x)
240 #define fio_swap64(x) __builtin_bswap64(x)
242 #include <byteswap.h>
243 #define fio_swap16(x) bswap_16(x)
244 #define fio_swap32(x) bswap_32(x)
245 #define fio_swap64(x) bswap_64(x)
246 #endif /* fio_swapN */
248 #define CACHE_LINE_FILE \
249 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
251 static inline int arch_cache_line_size(void)
256 fd = open(CACHE_LINE_FILE, O_RDONLY);
260 ret = read(fd, size, sizeof(size));
271 #define FIO_HAVE_CPU_ONLINE_SYSCONF
272 static inline unsigned int cpus_online(void)
274 return sysconf(_SC_NPROCESSORS_CONF);
278 static inline unsigned long long get_fs_free_size(const char *path)
280 unsigned long long ret;
283 if (statfs(path, &s) < 0)
287 ret *= (unsigned long long) s.f_bfree;
291 static inline int os_trim(struct fio_file *f, unsigned long long start,
292 unsigned long long len)
299 if (!ioctl(f->fd, BLKDISCARD, range))
305 #ifdef CONFIG_SCHED_IDLE
306 static inline int fio_set_sched_idle(void)
308 struct sched_param p = { .sched_priority = 0, };
309 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
313 #ifndef F_GET_RW_HINT
314 #ifndef F_LINUX_SPECIFIC_BASE
315 #define F_LINUX_SPECIFIC_BASE 1024
317 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
318 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
319 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
320 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
323 #ifndef RWH_WRITE_LIFE_NONE
324 #define RWH_WRITE_LIFE_NOT_SET 0
325 #define RWH_WRITE_LIFE_NONE 1
326 #define RWH_WRITE_LIFE_SHORT 2
327 #define RWH_WRITE_LIFE_MEDIUM 3
328 #define RWH_WRITE_LIFE_LONG 4
329 #define RWH_WRITE_LIFE_EXTREME 5
332 #define FIO_HAVE_WRITE_HINT
335 #define RWF_HIPRI 0x00000001
338 #define RWF_DSYNC 0x00000002
341 #define RWF_SYNC 0x00000004
344 #ifndef RWF_WRITE_LIFE_SHIFT
345 #define RWF_WRITE_LIFE_SHIFT 4
346 #define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
347 #define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
348 #define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
349 #define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
352 #ifndef CONFIG_PWRITEV2
354 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
357 #if BITS_PER_LONG == 64
361 *pos_l = offset & 0xffffffff;
362 *pos_h = ((uint64_t) offset) >> 32;
365 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
366 off_t offset, unsigned int flags)
368 unsigned long pos_l, pos_h;
370 make_pos_h_l(&pos_h, &pos_l, offset);
371 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
373 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
374 off_t offset, unsigned int flags)
376 unsigned long pos_l, pos_h;
378 make_pos_h_l(&pos_h, &pos_l, offset);
379 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
382 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
383 off_t offset, unsigned int flags)
388 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
389 off_t offset, unsigned int flags)
394 #endif /* __NR_preadv2 */
395 #endif /* CONFIG_PWRITEV2 */
397 static inline int shm_attach_to_open_removed(void)
402 #ifdef CONFIG_LINUX_FALLOCATE
403 #define FIO_HAVE_NATIVE_FALLOCATE
404 static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
408 ret = fallocate(f->fd, 0, 0, len);
412 /* Work around buggy old glibc versions... */
420 #define FIO_HAVE_CPU_HAS
421 static inline bool os_cpu_has(cpu_features feature)
424 unsigned long fio_unused hwcap;
427 #ifdef ARCH_HAVE_CRC_CRYPTO
428 case CPU_ARM64_CRC32C:
429 hwcap = getauxval(AT_HWCAP);
430 have_feature = (hwcap & HWCAP_CRC32) != 0;
434 have_feature = false;