| 1 | #ifndef FIO_OS_LINUX_H |
| 2 | #define FIO_OS_LINUX_H |
| 3 | |
| 4 | #include <sys/ioctl.h> |
| 5 | #include <sys/uio.h> |
| 6 | #include <sys/syscall.h> |
| 7 | #include <unistd.h> |
| 8 | #include <asm/unistd.h> |
| 9 | |
| 10 | #define FIO_HAVE_LIBAIO |
| 11 | #define FIO_HAVE_POSIXAIO |
| 12 | #define FIO_HAVE_FADVISE |
| 13 | #define FIO_HAVE_CPU_AFFINITY |
| 14 | #define FIO_HAVE_DISK_UTIL |
| 15 | #define FIO_HAVE_SGIO |
| 16 | #define FIO_HAVE_IOPRIO |
| 17 | #define FIO_HAVE_SPLICE |
| 18 | #define FIO_HAVE_IOSCHED_SWITCH |
| 19 | |
| 20 | #define OS_MAP_ANON (MAP_ANONYMOUS) |
| 21 | |
| 22 | typedef cpu_set_t os_cpu_mask_t; |
| 23 | |
| 24 | /* |
| 25 | * we want fadvise64 really, but it's so tangled... later |
| 26 | */ |
| 27 | #define fadvise(fd, off, len, advice) \ |
| 28 | posix_fadvise((fd), (off_t)(off), (len), (advice)) |
| 29 | |
| 30 | #define fio_setaffinity(td) \ |
| 31 | sched_setaffinity((td)->pid, sizeof((td)->cpumask), &(td)->cpumask) |
| 32 | #define fio_getaffinity(pid, ptr) \ |
| 33 | sched_getaffinity((pid), sizeof(cpu_set_t), (ptr)) |
| 34 | |
| 35 | static inline int ioprio_set(int which, int who, int ioprio) |
| 36 | { |
| 37 | return syscall(__NR_ioprio_set, which, who, ioprio); |
| 38 | } |
| 39 | |
| 40 | static _syscall6(int, sys_splice, int, fdin, loff_t *, off_in, int, fdout, loff_t *, off_out, size_t, len, unsigned int, flags); |
| 41 | static _syscall4(int, sys_vmsplice, int, fd, const struct iovec *, iov, unsigned long, nr_segs, unsigned int, flags); |
| 42 | static _syscall4(int, sys_tee, int, fdin, int, fdout, size_t, len, unsigned int, flags); |
| 43 | |
| 44 | static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out, |
| 45 | size_t len, unsigned long flags) |
| 46 | { |
| 47 | return sys_splice(fdin, off_in, fdout, off_out, len, flags); |
| 48 | } |
| 49 | |
| 50 | static inline int tee(int fdin, int fdout, size_t len, unsigned int flags) |
| 51 | { |
| 52 | return sys_tee(fdin, fdout, len, flags); |
| 53 | } |
| 54 | |
| 55 | static inline int vmsplice(int fd, const struct iovec *iov, |
| 56 | unsigned long nr_segs, unsigned int flags) |
| 57 | { |
| 58 | return sys_vmsplice(fd, iov, nr_segs, flags); |
| 59 | } |
| 60 | |
| 61 | #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ |
| 62 | #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */ |
| 63 | /* we may still block on the fd we splice */ |
| 64 | /* from/to, of course */ |
| 65 | #define SPLICE_F_MORE (0x04) /* expect more data */ |
| 66 | #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */ |
| 67 | |
| 68 | #define SPLICE_DEF_SIZE (64*1024) |
| 69 | |
| 70 | enum { |
| 71 | IOPRIO_WHO_PROCESS = 1, |
| 72 | IOPRIO_WHO_PGRP, |
| 73 | IOPRIO_WHO_USER, |
| 74 | }; |
| 75 | |
| 76 | #define IOPRIO_CLASS_SHIFT 13 |
| 77 | |
| 78 | #ifndef BLKGETSIZE64 |
| 79 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) |
| 80 | #endif |
| 81 | |
| 82 | static inline int blockdev_size(int fd, unsigned long long *bytes) |
| 83 | { |
| 84 | if (!ioctl(fd, BLKGETSIZE64, bytes)) |
| 85 | return 0; |
| 86 | |
| 87 | return errno; |
| 88 | } |
| 89 | |
| 90 | #endif |