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 #include "./os-linux-syscall.h"
26 #ifndef __has_builtin // Optional of course.
27 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
30 #define FIO_HAVE_CPU_AFFINITY
31 #define FIO_HAVE_DISK_UTIL
33 #define FIO_HAVE_IOPRIO
34 #define FIO_HAVE_IOPRIO_CLASS
35 #define FIO_HAVE_IOSCHED_SWITCH
36 #define FIO_HAVE_ODIRECT
37 #define FIO_HAVE_HUGETLB
38 #define FIO_HAVE_RAWBIND
39 #define FIO_HAVE_BLKTRACE
40 #define FIO_HAVE_CL_SIZE
41 #define FIO_HAVE_CGROUPS
42 #define FIO_HAVE_FS_STAT
44 #define FIO_HAVE_BINJECT
45 #define FIO_HAVE_GETTID
46 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
47 #define FIO_HAVE_PWRITEV2
48 #define FIO_HAVE_SHM_ATTACH_REMOVED
51 #define FIO_HAVE_MMAP_HUGE
54 #define OS_MAP_ANON MAP_ANONYMOUS
56 typedef cpu_set_t os_cpu_mask_t;
58 typedef struct drand48_data os_random_state_t;
60 #ifdef CONFIG_3ARG_AFFINITY
61 #define fio_setaffinity(pid, cpumask) \
62 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
63 #define fio_getaffinity(pid, ptr) \
64 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
65 #elif defined(CONFIG_2ARG_AFFINITY)
66 #define fio_setaffinity(pid, cpumask) \
67 sched_setaffinity((pid), &(cpumask))
68 #define fio_getaffinity(pid, ptr) \
69 sched_getaffinity((pid), (ptr))
72 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
73 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
74 #define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
75 #define fio_cpu_count(mask) CPU_COUNT((mask))
77 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
83 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
88 #define FIO_MAX_CPUS CPU_SETSIZE
98 IOPRIO_WHO_PROCESS = 1,
103 #define IOPRIO_BITS 16
104 #define IOPRIO_CLASS_SHIFT 13
106 #define IOPRIO_MIN_PRIO 0 /* highest priority */
107 #define IOPRIO_MAX_PRIO 7 /* lowest priority */
109 #define IOPRIO_MIN_PRIO_CLASS 0
110 #define IOPRIO_MAX_PRIO_CLASS 3
112 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
115 * If no class is set, assume BE
118 ioprio_class = IOPRIO_CLASS_BE;
120 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
121 return syscall(__NR_ioprio_set, which, who, ioprio);
124 static inline int gettid(void)
126 return syscall(__NR_gettid);
129 #define SPLICE_DEF_SIZE (64*1024)
132 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
136 #define BLKFLSBUF _IO(0x12,97)
140 #define BLKDISCARD _IO(0x12,119)
143 static inline int blockdev_invalidate_cache(struct fio_file *f)
145 return ioctl(f->fd, BLKFLSBUF);
148 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
150 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
156 static inline unsigned long long os_phys_mem(void)
158 long pagesize, pages;
160 pagesize = sysconf(_SC_PAGESIZE);
161 pages = sysconf(_SC_PHYS_PAGES);
162 if (pages == -1 || pagesize == -1)
165 return (unsigned long long) pages * (unsigned long long) pagesize;
168 static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
173 static inline long os_random_long(os_random_state_t *rs)
181 static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
183 struct raw_config_request rq;
186 if (major(dev) != RAW_MAJOR)
190 * we should be able to find /dev/rawctl or /dev/raw/rawctl
192 fd = open("/dev/rawctl", O_RDONLY);
194 fd = open("/dev/raw/rawctl", O_RDONLY);
199 rq.raw_minor = minor(dev);
200 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
206 *majdev = rq.block_major;
207 *mindev = rq.block_minor;
212 #define FIO_O_NOATIME O_NOATIME
214 #define FIO_O_NOATIME 0
218 #define OS_O_ATOMIC O_ATOMIC
220 #define OS_O_ATOMIC 040000000
224 #define FIO_MADV_FREE MADV_REMOVE
227 /* Check for GCC or Clang byte swap intrinsics */
228 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
229 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
230 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
231 #define fio_swap16(x) __builtin_bswap16(x)
232 #define fio_swap32(x) __builtin_bswap32(x)
233 #define fio_swap64(x) __builtin_bswap64(x)
235 #include <byteswap.h>
236 #define fio_swap16(x) bswap_16(x)
237 #define fio_swap32(x) bswap_32(x)
238 #define fio_swap64(x) bswap_64(x)
239 #endif /* fio_swapN */
241 #define CACHE_LINE_FILE \
242 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
244 static inline int arch_cache_line_size(void)
249 fd = open(CACHE_LINE_FILE, O_RDONLY);
253 ret = read(fd, size, sizeof(size));
264 #define FIO_HAVE_CPU_ONLINE_SYSCONF
265 static inline unsigned int cpus_online(void)
267 return sysconf(_SC_NPROCESSORS_CONF);
271 static inline unsigned long long get_fs_free_size(const char *path)
273 unsigned long long ret;
276 if (statfs(path, &s) < 0)
280 ret *= (unsigned long long) s.f_bfree;
284 static inline int os_trim(struct fio_file *f, unsigned long long start,
285 unsigned long long len)
292 if (!ioctl(f->fd, BLKDISCARD, range))
298 #ifdef CONFIG_SCHED_IDLE
299 static inline int fio_set_sched_idle(void)
301 struct sched_param p = { .sched_priority = 0, };
302 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
306 #ifndef F_GET_RW_HINT
307 #ifndef F_LINUX_SPECIFIC_BASE
308 #define F_LINUX_SPECIFIC_BASE 1024
310 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
311 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
312 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
313 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
316 #ifndef RWH_WRITE_LIFE_NONE
317 #define RWH_WRITE_LIFE_NOT_SET 0
318 #define RWH_WRITE_LIFE_NONE 1
319 #define RWH_WRITE_LIFE_SHORT 2
320 #define RWH_WRITE_LIFE_MEDIUM 3
321 #define RWH_WRITE_LIFE_LONG 4
322 #define RWH_WRITE_LIFE_EXTREME 5
325 #define FIO_HAVE_WRITE_HINT
328 #define RWF_HIPRI 0x00000001
331 #define RWF_DSYNC 0x00000002
334 #define RWF_SYNC 0x00000004
337 #ifndef RWF_WRITE_LIFE_SHIFT
338 #define RWF_WRITE_LIFE_SHIFT 4
339 #define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
340 #define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
341 #define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
342 #define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
345 #ifndef CONFIG_PWRITEV2
347 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
350 #if BITS_PER_LONG == 64
354 *pos_l = offset & 0xffffffff;
355 *pos_h = ((uint64_t) offset) >> 32;
358 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
359 off_t offset, unsigned int flags)
361 unsigned long pos_l, pos_h;
363 make_pos_h_l(&pos_h, &pos_l, offset);
364 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
366 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
367 off_t offset, unsigned int flags)
369 unsigned long pos_l, pos_h;
371 make_pos_h_l(&pos_h, &pos_l, offset);
372 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
375 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
376 off_t offset, unsigned int flags)
381 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
382 off_t offset, unsigned int flags)
387 #endif /* __NR_preadv2 */
388 #endif /* CONFIG_PWRITEV2 */
390 static inline int shm_attach_to_open_removed(void)
395 #ifdef CONFIG_LINUX_FALLOCATE
396 #define FIO_HAVE_NATIVE_FALLOCATE
397 static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
401 ret = fallocate(f->fd, 0, 0, len);
405 /* Work around buggy old glibc versions... */