4 #define FIO_OS os_linux
8 #include <sys/syscall.h>
14 #include <linux/unistd.h>
15 #include <linux/raw.h>
16 #include <linux/major.h>
23 #define FIO_HAVE_LIBAIO
24 #define FIO_HAVE_POSIXAIO
25 #define FIO_HAVE_FADVISE
26 #define FIO_HAVE_CPU_AFFINITY
27 #define FIO_HAVE_DISK_UTIL
29 #define FIO_HAVE_IOPRIO
30 #define FIO_HAVE_SPLICE
31 #define FIO_HAVE_IOSCHED_SWITCH
32 #define FIO_HAVE_ODIRECT
33 #define FIO_HAVE_HUGETLB
34 #define FIO_HAVE_RAWBIND
35 #define FIO_HAVE_BLKTRACE
36 #define FIO_HAVE_STRSEP
37 #define FIO_HAVE_POSIXAIO_FSYNC
38 #define FIO_HAVE_PSHARED_MUTEX
39 #define FIO_HAVE_CL_SIZE
40 #define FIO_HAVE_CGROUPS
41 #define FIO_HAVE_FDATASYNC
42 #define FIO_HAVE_FS_STAT
44 #define FIO_HAVE_BINJECT
45 #define FIO_HAVE_CLOCK_MONOTONIC
46 #define FIO_HAVE_GETTID
47 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
50 * Can only enable this for newer glibcs, or the header and defines are
53 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 6
54 #define FIO_HAVE_FALLOCATE
56 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 8
57 #define FIO_HAVE_LINUX_FALLOCATE
60 #ifdef SYNC_FILE_RANGE_WAIT_BEFORE
61 #define FIO_HAVE_SYNC_FILE_RANGE
64 #define OS_MAP_ANON MAP_ANONYMOUS
66 #ifndef CLOCK_MONOTONIC
67 #define CLOCK_MONOTONIC 1
70 typedef cpu_set_t os_cpu_mask_t;
72 typedef struct drand48_data os_random_state_t;
75 * we want fadvise64 really, but it's so tangled... later
77 #ifdef FIO_HAVE_FADVISE
78 #define fadvise(fd, off, len, advice) \
79 posix_fadvise((fd), (off_t)(off), (len), (advice))
83 * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want
84 * the affinity helpers to work.
87 #define fio_setaffinity(pid, cpumask) \
88 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
89 #define fio_getaffinity(pid, ptr) \
90 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
92 #define fio_setaffinity(pid, cpumask) \
93 sched_setaffinity((pid), &(cpumask))
94 #define fio_getaffinity(pid, ptr) \
95 sched_getaffinity((pid), (ptr))
98 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
99 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
101 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
107 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
112 #define FIO_MAX_CPUS CPU_SETSIZE
122 IOPRIO_WHO_PROCESS = 1,
127 #define IOPRIO_BITS 16
128 #define IOPRIO_CLASS_SHIFT 13
130 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
133 * If no class is set, assume BE
136 ioprio_class = IOPRIO_CLASS_BE;
138 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
139 return syscall(__NR_ioprio_set, which, who, ioprio);
142 static inline int gettid(void)
144 return syscall(__NR_gettid);
148 * Just check for SPLICE_F_MOVE, if that isn't there, assume the others
151 #ifndef SPLICE_F_MOVE
152 #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
153 #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
154 /* we may still block on the fd we splice */
155 /* from/to, of course */
156 #define SPLICE_F_MORE (0x04) /* expect more data */
157 #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
159 static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
160 size_t len, unsigned int flags)
162 return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
165 static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
167 return syscall(__NR_sys_tee, fdin, fdout, len, flags);
170 static inline int vmsplice(int fd, const struct iovec *iov,
171 unsigned long nr_segs, unsigned int flags)
173 return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
177 #define SPLICE_DEF_SIZE (64*1024)
179 #ifdef FIO_HAVE_SYSLET
182 struct async_head_user;
187 static inline struct syslet_uatom *
188 async_exec(struct syslet_uatom *atom, struct async_head_user *ahu)
190 return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu);
194 async_wait(unsigned long min_wait_events, unsigned long user_ring_idx,
195 struct async_head_user *ahu)
197 return syscall(__NR_async_wait, min_wait_events,
201 static inline long async_thread(void *event, struct async_head_user *ahu)
203 return syscall(__NR_async_thread, event, ahu);
206 static inline long umem_add(unsigned long *uptr, unsigned long inc)
208 return syscall(__NR_umem_add, uptr, inc);
210 #endif /* FIO_HAVE_SYSLET */
213 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
217 #define BLKFLSBUF _IO(0x12,97)
221 #define BLKDISCARD _IO(0x12,119)
224 static inline int blockdev_invalidate_cache(struct fio_file *f)
226 return ioctl(f->fd, BLKFLSBUF);
229 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
231 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
237 static inline unsigned long long os_phys_mem(void)
239 long pagesize, pages;
241 pagesize = sysconf(_SC_PAGESIZE);
242 pages = sysconf(_SC_PHYS_PAGES);
243 if (pages == -1 || pagesize == -1)
246 return (unsigned long long) pages * (unsigned long long) pagesize;
249 static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
254 static inline long os_random_long(os_random_state_t *rs)
262 static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
264 struct raw_config_request rq;
267 if (major(dev) != RAW_MAJOR)
271 * we should be able to find /dev/rawctl or /dev/raw/rawctl
273 fd = open("/dev/rawctl", O_RDONLY);
275 fd = open("/dev/raw/rawctl", O_RDONLY);
280 rq.raw_minor = minor(dev);
281 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
287 *majdev = rq.block_major;
288 *mindev = rq.block_minor;
293 #define FIO_O_NOATIME O_NOATIME
295 #define FIO_O_NOATIME 0
299 #define FIO_MADV_FREE MADV_REMOVE
302 #if __BYTE_ORDER == __LITTLE_ENDIAN
303 #define FIO_LITTLE_ENDIAN
304 #elif __BYTE_ORDER == __BIG_ENDIAN
305 #define FIO_BIG_ENDIAN
307 #error "Unknown endianness"
310 #define fio_swap16(x) __bswap_16(x)
311 #define fio_swap32(x) __bswap_32(x)
312 #define fio_swap64(x) __bswap_64(x)
314 #define CACHE_LINE_FILE \
315 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
317 static inline int arch_cache_line_size(void)
322 fd = open(CACHE_LINE_FILE, O_RDONLY);
326 ret = read(fd, size, sizeof(size));
336 static inline unsigned long long get_fs_size(const char *path)
338 unsigned long long ret;
341 if (statfs(path, &s) < 0)
345 ret *= (unsigned long long) s.f_bfree;
349 static inline int os_trim(int fd, unsigned long long start,
350 unsigned long long len)
357 if (!ioctl(fd, BLKDISCARD, range))