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>
20 #include "./os-linux-syscall.h"
24 #ifndef __has_builtin // Optional of course.
25 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
28 #define FIO_HAVE_CPU_AFFINITY
29 #define FIO_HAVE_DISK_UTIL
31 #define FIO_HAVE_IOPRIO
32 #define FIO_HAVE_IOPRIO_CLASS
33 #define FIO_HAVE_IOSCHED_SWITCH
34 #define FIO_HAVE_ODIRECT
35 #define FIO_HAVE_HUGETLB
36 #define FIO_HAVE_RAWBIND
37 #define FIO_HAVE_BLKTRACE
38 #define FIO_HAVE_CL_SIZE
39 #define FIO_HAVE_CGROUPS
40 #define FIO_HAVE_FS_STAT
42 #define FIO_HAVE_BINJECT
43 #define FIO_HAVE_GETTID
44 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
45 #define FIO_HAVE_PWRITEV2
46 #define FIO_HAVE_SHM_ATTACH_REMOVED
49 #define FIO_HAVE_MMAP_HUGE
52 #define OS_MAP_ANON MAP_ANONYMOUS
54 typedef cpu_set_t os_cpu_mask_t;
56 typedef struct drand48_data os_random_state_t;
58 #ifdef CONFIG_3ARG_AFFINITY
59 #define fio_setaffinity(pid, cpumask) \
60 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
61 #define fio_getaffinity(pid, ptr) \
62 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
63 #elif defined(CONFIG_2ARG_AFFINITY)
64 #define fio_setaffinity(pid, cpumask) \
65 sched_setaffinity((pid), &(cpumask))
66 #define fio_getaffinity(pid, ptr) \
67 sched_getaffinity((pid), (ptr))
70 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
71 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
72 #define fio_cpu_isset(mask, cpu) CPU_ISSET((cpu), (mask))
73 #define fio_cpu_count(mask) CPU_COUNT((mask))
75 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
81 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
86 #define FIO_MAX_CPUS CPU_SETSIZE
96 IOPRIO_WHO_PROCESS = 1,
101 #define IOPRIO_BITS 16
102 #define IOPRIO_CLASS_SHIFT 13
104 #define IOPRIO_MIN_PRIO 0 /* highest priority */
105 #define IOPRIO_MAX_PRIO 7 /* lowest priority */
107 #define IOPRIO_MIN_PRIO_CLASS 0
108 #define IOPRIO_MAX_PRIO_CLASS 3
110 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
113 * If no class is set, assume BE
116 ioprio_class = IOPRIO_CLASS_BE;
118 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
119 return syscall(__NR_ioprio_set, which, who, ioprio);
122 static inline int gettid(void)
124 return syscall(__NR_gettid);
127 #define SPLICE_DEF_SIZE (64*1024)
130 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
134 #define BLKFLSBUF _IO(0x12,97)
138 #define BLKDISCARD _IO(0x12,119)
141 static inline int blockdev_invalidate_cache(struct fio_file *f)
143 return ioctl(f->fd, BLKFLSBUF);
146 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
148 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
154 static inline unsigned long long os_phys_mem(void)
156 long pagesize, pages;
158 pagesize = sysconf(_SC_PAGESIZE);
159 pages = sysconf(_SC_PHYS_PAGES);
160 if (pages == -1 || pagesize == -1)
163 return (unsigned long long) pages * (unsigned long long) pagesize;
166 static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
171 static inline long os_random_long(os_random_state_t *rs)
179 static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
181 struct raw_config_request rq;
184 if (major(dev) != RAW_MAJOR)
188 * we should be able to find /dev/rawctl or /dev/raw/rawctl
190 fd = open("/dev/rawctl", O_RDONLY);
192 fd = open("/dev/raw/rawctl", O_RDONLY);
197 rq.raw_minor = minor(dev);
198 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
204 *majdev = rq.block_major;
205 *mindev = rq.block_minor;
210 #define FIO_O_NOATIME O_NOATIME
212 #define FIO_O_NOATIME 0
216 #define OS_O_ATOMIC O_ATOMIC
218 #define OS_O_ATOMIC 040000000
222 #define FIO_MADV_FREE MADV_REMOVE
225 /* Check for GCC or Clang byte swap intrinsics */
226 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
227 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
228 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
229 #define fio_swap16(x) __builtin_bswap16(x)
230 #define fio_swap32(x) __builtin_bswap32(x)
231 #define fio_swap64(x) __builtin_bswap64(x)
233 #include <byteswap.h>
234 #define fio_swap16(x) bswap_16(x)
235 #define fio_swap32(x) bswap_32(x)
236 #define fio_swap64(x) bswap_64(x)
237 #endif /* fio_swapN */
239 #define CACHE_LINE_FILE \
240 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
242 static inline int arch_cache_line_size(void)
247 fd = open(CACHE_LINE_FILE, O_RDONLY);
251 ret = read(fd, size, sizeof(size));
261 static inline unsigned long long get_fs_free_size(const char *path)
263 unsigned long long ret;
266 if (statfs(path, &s) < 0)
270 ret *= (unsigned long long) s.f_bfree;
274 static inline int os_trim(int fd, unsigned long long start,
275 unsigned long long len)
282 if (!ioctl(fd, BLKDISCARD, range))
288 #ifdef CONFIG_SCHED_IDLE
289 static inline int fio_set_sched_idle(void)
291 struct sched_param p = { .sched_priority = 0, };
292 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
296 #ifndef POSIX_FADV_STREAMID
297 #define POSIX_FADV_STREAMID 8
300 #define FIO_HAVE_STREAMID
303 #define RWF_HIPRI 0x00000001
306 #define RWF_DSYNC 0x00000002
309 #define RWF_SYNC 0x00000004
312 #ifndef CONFIG_PWRITEV2
314 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
317 #if BITS_PER_LONG == 64
321 *pos_l = offset & 0xffffffff;
322 *pos_h = ((uint64_t) offset) >> 32;
325 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
326 off_t offset, unsigned int flags)
328 unsigned long pos_l, pos_h;
330 make_pos_h_l(&pos_h, &pos_l, offset);
331 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
333 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
334 off_t offset, unsigned int flags)
336 unsigned long pos_l, pos_h;
338 make_pos_h_l(&pos_h, &pos_l, offset);
339 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
342 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
343 off_t offset, unsigned int flags)
348 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
349 off_t offset, unsigned int flags)
354 #endif /* __NR_preadv2 */
355 #endif /* CONFIG_PWRITEV2 */
357 static inline int shm_attach_to_open_removed(void)