4 #define FIO_OS os_linux
8 #include <sys/syscall.h>
15 #include <linux/unistd.h>
16 #include <linux/raw.h>
17 #include <linux/major.h>
24 #define FIO_HAVE_LIBAIO
25 #define FIO_HAVE_POSIXAIO
26 #define FIO_HAVE_FADVISE
27 #define FIO_HAVE_CPU_AFFINITY
28 #define FIO_HAVE_DISK_UTIL
30 #define FIO_HAVE_IOPRIO
31 #define FIO_HAVE_SPLICE
32 #define FIO_HAVE_IOSCHED_SWITCH
33 #define FIO_HAVE_ODIRECT
34 #define FIO_HAVE_HUGETLB
35 #define FIO_HAVE_RAWBIND
36 #define FIO_HAVE_BLKTRACE
37 #define FIO_HAVE_STRSEP
38 #define FIO_HAVE_POSIXAIO_FSYNC
39 #define FIO_HAVE_PSHARED_MUTEX
40 #define FIO_HAVE_CL_SIZE
41 #define FIO_HAVE_CGROUPS
42 #define FIO_HAVE_FDATASYNC
43 #define FIO_HAVE_FS_STAT
45 #define FIO_HAVE_BINJECT
46 #define FIO_HAVE_CLOCK_MONOTONIC
47 #define FIO_HAVE_GETTID
48 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
49 #define FIO_HAVE_E4_ENG
52 #define FIO_HAVE_MMAP_HUGE
56 * Can only enable this for newer glibcs, or the header and defines are
59 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 6
60 #define FIO_HAVE_FALLOCATE
62 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 8
63 #define FIO_HAVE_LINUX_FALLOCATE
66 #ifdef FIO_HAVE_LINUX_FALLOCATE
67 #define FIO_HAVE_FALLOC_ENG
70 #ifdef SYNC_FILE_RANGE_WAIT_BEFORE
71 #define FIO_HAVE_SYNC_FILE_RANGE
74 #define OS_MAP_ANON MAP_ANONYMOUS
76 #ifndef CLOCK_MONOTONIC
77 #define CLOCK_MONOTONIC 1
80 typedef cpu_set_t os_cpu_mask_t;
82 typedef struct drand48_data os_random_state_t;
85 * we want fadvise64 really, but it's so tangled... later
87 #ifdef FIO_HAVE_FADVISE
88 #define fadvise(fd, off, len, advice) \
89 posix_fadvise((fd), (off_t)(off), (len), (advice))
93 * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want
94 * the affinity helpers to work.
97 #define fio_setaffinity(pid, cpumask) \
98 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
99 #define fio_getaffinity(pid, ptr) \
100 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
102 #define fio_setaffinity(pid, cpumask) \
103 sched_setaffinity((pid), &(cpumask))
104 #define fio_getaffinity(pid, ptr) \
105 sched_getaffinity((pid), (ptr))
108 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
109 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
111 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
117 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
122 #define FIO_MAX_CPUS CPU_SETSIZE
124 static inline int ioprio_set(int which, int who, int ioprio)
126 return syscall(__NR_ioprio_set, which, who, ioprio);
129 static inline int gettid(void)
131 return syscall(__NR_gettid);
135 * Just check for SPLICE_F_MOVE, if that isn't there, assume the others
138 #ifndef SPLICE_F_MOVE
139 #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
140 #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
141 /* we may still block on the fd we splice */
142 /* from/to, of course */
143 #define SPLICE_F_MORE (0x04) /* expect more data */
144 #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */
146 static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out,
147 size_t len, unsigned int flags)
149 return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags);
152 static inline int tee(int fdin, int fdout, size_t len, unsigned int flags)
154 return syscall(__NR_sys_tee, fdin, fdout, len, flags);
157 static inline int vmsplice(int fd, const struct iovec *iov,
158 unsigned long nr_segs, unsigned int flags)
160 return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags);
164 #define SPLICE_DEF_SIZE (64*1024)
166 #ifdef FIO_HAVE_SYSLET
169 struct async_head_user;
174 static inline struct syslet_uatom *
175 async_exec(struct syslet_uatom *atom, struct async_head_user *ahu)
177 return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu);
181 async_wait(unsigned long min_wait_events, unsigned long user_ring_idx,
182 struct async_head_user *ahu)
184 return syscall(__NR_async_wait, min_wait_events,
188 static inline long async_thread(void *event, struct async_head_user *ahu)
190 return syscall(__NR_async_thread, event, ahu);
193 static inline long umem_add(unsigned long *uptr, unsigned long inc)
195 return syscall(__NR_umem_add, uptr, inc);
197 #endif /* FIO_HAVE_SYSLET */
207 IOPRIO_WHO_PROCESS = 1,
212 #define IOPRIO_BITS 16
213 #define IOPRIO_CLASS_SHIFT 13
216 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
220 #define BLKFLSBUF _IO(0x12,97)
224 #define BLKDISCARD _IO(0x12,119)
227 static inline int blockdev_invalidate_cache(struct fio_file *f)
229 return ioctl(f->fd, BLKFLSBUF);
232 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
234 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
240 static inline unsigned long long os_phys_mem(void)
242 long pagesize, pages;
244 pagesize = sysconf(_SC_PAGESIZE);
245 pages = sysconf(_SC_PHYS_PAGES);
246 if (pages == -1 || pagesize == -1)
249 return (unsigned long long) pages * (unsigned long long) pagesize;
252 static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
257 static inline long os_random_long(os_random_state_t *rs)
265 static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev)
267 struct raw_config_request rq;
270 if (major(dev) != RAW_MAJOR)
274 * we should be able to find /dev/rawctl or /dev/raw/rawctl
276 fd = open("/dev/rawctl", O_RDONLY);
278 fd = open("/dev/raw/rawctl", O_RDONLY);
283 rq.raw_minor = minor(dev);
284 if (ioctl(fd, RAW_GETBIND, &rq) < 0) {
290 *majdev = rq.block_major;
291 *mindev = rq.block_minor;
296 #define FIO_O_NOATIME O_NOATIME
298 #define FIO_O_NOATIME 0
302 #define FIO_MADV_FREE MADV_REMOVE
305 #if __BYTE_ORDER == __LITTLE_ENDIAN
306 #define FIO_LITTLE_ENDIAN
307 #elif __BYTE_ORDER == __BIG_ENDIAN
308 #define FIO_BIG_ENDIAN
310 #error "Unknown endianness"
313 #define fio_swap16(x) __bswap_16(x)
314 #define fio_swap32(x) __bswap_32(x)
315 #define fio_swap64(x) __bswap_64(x)
317 #define CACHE_LINE_FILE \
318 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
320 static inline int arch_cache_line_size(void)
325 fd = open(CACHE_LINE_FILE, O_RDONLY);
329 ret = read(fd, size, sizeof(size));
339 static inline unsigned long long get_fs_size(const char *path)
341 unsigned long long ret;
344 if (statfs(path, &s) < 0)
348 ret *= (unsigned long long) s.f_bfree;
352 static inline int os_trim(int fd, unsigned long long start,
353 unsigned long long len)
360 if (!ioctl(fd, BLKDISCARD, range))