| 1 | #ifndef FIO_OS_LINUX_H |
| 2 | #define FIO_OS_LINUX_H |
| 3 | |
| 4 | #define FIO_OS os_linux |
| 5 | |
| 6 | #include <sys/ioctl.h> |
| 7 | #include <sys/uio.h> |
| 8 | #include <sys/syscall.h> |
| 9 | #include <sys/vfs.h> |
| 10 | #include <unistd.h> |
| 11 | #include <fcntl.h> |
| 12 | #include <errno.h> |
| 13 | #include <sched.h> |
| 14 | #include <linux/unistd.h> |
| 15 | #include <linux/raw.h> |
| 16 | #include <linux/major.h> |
| 17 | #include <endian.h> |
| 18 | |
| 19 | #include "indirect.h" |
| 20 | #include "binject.h" |
| 21 | #include "../file.h" |
| 22 | |
| 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 |
| 28 | #define FIO_HAVE_SGIO |
| 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_FALLOCATE |
| 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 |
| 44 | #define FIO_HAVE_TRIM |
| 45 | #define FIO_HAVE_BINJECT |
| 46 | #define FIO_HAVE_CLOCK_MONOTONIC |
| 47 | #define FIO_HAVE_GETTID |
| 48 | |
| 49 | /* |
| 50 | * Can only enable this for newer glibcs, or the header and defines are |
| 51 | * missing |
| 52 | */ |
| 53 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 6 |
| 54 | #define FIO_HAVE_LINUX_FALLOCATE |
| 55 | #endif |
| 56 | |
| 57 | #ifdef SYNC_FILE_RANGE_WAIT_BEFORE |
| 58 | #define FIO_HAVE_SYNC_FILE_RANGE |
| 59 | #endif |
| 60 | |
| 61 | #define OS_MAP_ANON MAP_ANONYMOUS |
| 62 | |
| 63 | #ifndef CLOCK_MONOTONIC |
| 64 | #define CLOCK_MONOTONIC 1 |
| 65 | #endif |
| 66 | |
| 67 | typedef cpu_set_t os_cpu_mask_t; |
| 68 | |
| 69 | typedef struct drand48_data os_random_state_t; |
| 70 | |
| 71 | /* |
| 72 | * we want fadvise64 really, but it's so tangled... later |
| 73 | */ |
| 74 | #ifdef FIO_HAVE_FADVISE |
| 75 | #define fadvise(fd, off, len, advice) \ |
| 76 | posix_fadvise((fd), (off_t)(off), (len), (advice)) |
| 77 | #endif |
| 78 | |
| 79 | /* |
| 80 | * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want |
| 81 | * the affinity helpers to work. |
| 82 | */ |
| 83 | #ifndef GLIBC_2_3_2 |
| 84 | #define fio_setaffinity(pid, cpumask) \ |
| 85 | sched_setaffinity((pid), sizeof(cpumask), &(cpumask)) |
| 86 | #define fio_getaffinity(pid, ptr) \ |
| 87 | sched_getaffinity((pid), sizeof(cpu_set_t), (ptr)) |
| 88 | #else |
| 89 | #define fio_setaffinity(pid, cpumask) \ |
| 90 | sched_setaffinity((pid), &(cpumask)) |
| 91 | #define fio_getaffinity(pid, ptr) \ |
| 92 | sched_getaffinity((pid), (ptr)) |
| 93 | #endif |
| 94 | |
| 95 | #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask)) |
| 96 | #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask)) |
| 97 | |
| 98 | static inline int fio_cpuset_init(os_cpu_mask_t *mask) |
| 99 | { |
| 100 | CPU_ZERO(mask); |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | static inline int fio_cpuset_exit(os_cpu_mask_t *mask) |
| 105 | { |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | #define FIO_MAX_CPUS CPU_SETSIZE |
| 110 | |
| 111 | static inline int ioprio_set(int which, int who, int ioprio) |
| 112 | { |
| 113 | return syscall(__NR_ioprio_set, which, who, ioprio); |
| 114 | } |
| 115 | |
| 116 | static inline int gettid(void) |
| 117 | { |
| 118 | return syscall(__NR_gettid); |
| 119 | } |
| 120 | |
| 121 | /* |
| 122 | * Just check for SPLICE_F_MOVE, if that isn't there, assume the others |
| 123 | * aren't either. |
| 124 | */ |
| 125 | #ifndef SPLICE_F_MOVE |
| 126 | #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ |
| 127 | #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */ |
| 128 | /* we may still block on the fd we splice */ |
| 129 | /* from/to, of course */ |
| 130 | #define SPLICE_F_MORE (0x04) /* expect more data */ |
| 131 | #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */ |
| 132 | |
| 133 | static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out, |
| 134 | size_t len, unsigned int flags) |
| 135 | { |
| 136 | return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags); |
| 137 | } |
| 138 | |
| 139 | static inline int tee(int fdin, int fdout, size_t len, unsigned int flags) |
| 140 | { |
| 141 | return syscall(__NR_sys_tee, fdin, fdout, len, flags); |
| 142 | } |
| 143 | |
| 144 | static inline int vmsplice(int fd, const struct iovec *iov, |
| 145 | unsigned long nr_segs, unsigned int flags) |
| 146 | { |
| 147 | return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags); |
| 148 | } |
| 149 | #endif |
| 150 | |
| 151 | #define SPLICE_DEF_SIZE (64*1024) |
| 152 | |
| 153 | #ifdef FIO_HAVE_SYSLET |
| 154 | |
| 155 | struct syslet_uatom; |
| 156 | struct async_head_user; |
| 157 | |
| 158 | /* |
| 159 | * syslet stuff |
| 160 | */ |
| 161 | static inline struct syslet_uatom * |
| 162 | async_exec(struct syslet_uatom *atom, struct async_head_user *ahu) |
| 163 | { |
| 164 | return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu); |
| 165 | } |
| 166 | |
| 167 | static inline long |
| 168 | async_wait(unsigned long min_wait_events, unsigned long user_ring_idx, |
| 169 | struct async_head_user *ahu) |
| 170 | { |
| 171 | return syscall(__NR_async_wait, min_wait_events, |
| 172 | user_ring_idx, ahu); |
| 173 | } |
| 174 | |
| 175 | static inline long async_thread(void *event, struct async_head_user *ahu) |
| 176 | { |
| 177 | return syscall(__NR_async_thread, event, ahu); |
| 178 | } |
| 179 | |
| 180 | static inline long umem_add(unsigned long *uptr, unsigned long inc) |
| 181 | { |
| 182 | return syscall(__NR_umem_add, uptr, inc); |
| 183 | } |
| 184 | #endif /* FIO_HAVE_SYSLET */ |
| 185 | |
| 186 | enum { |
| 187 | IOPRIO_CLASS_NONE, |
| 188 | IOPRIO_CLASS_RT, |
| 189 | IOPRIO_CLASS_BE, |
| 190 | IOPRIO_CLASS_IDLE, |
| 191 | }; |
| 192 | |
| 193 | enum { |
| 194 | IOPRIO_WHO_PROCESS = 1, |
| 195 | IOPRIO_WHO_PGRP, |
| 196 | IOPRIO_WHO_USER, |
| 197 | }; |
| 198 | |
| 199 | #define IOPRIO_BITS 16 |
| 200 | #define IOPRIO_CLASS_SHIFT 13 |
| 201 | |
| 202 | #ifndef BLKGETSIZE64 |
| 203 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) |
| 204 | #endif |
| 205 | |
| 206 | #ifndef BLKFLSBUF |
| 207 | #define BLKFLSBUF _IO(0x12,97) |
| 208 | #endif |
| 209 | |
| 210 | #ifndef BLKDISCARD |
| 211 | #define BLKDISCARD _IO(0x12,119) |
| 212 | #endif |
| 213 | |
| 214 | static inline int blockdev_invalidate_cache(struct fio_file *f) |
| 215 | { |
| 216 | return ioctl(f->fd, BLKFLSBUF); |
| 217 | } |
| 218 | |
| 219 | static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes) |
| 220 | { |
| 221 | if (!ioctl(f->fd, BLKGETSIZE64, bytes)) |
| 222 | return 0; |
| 223 | |
| 224 | return errno; |
| 225 | } |
| 226 | |
| 227 | static inline unsigned long long os_phys_mem(void) |
| 228 | { |
| 229 | long pagesize, pages; |
| 230 | |
| 231 | pagesize = sysconf(_SC_PAGESIZE); |
| 232 | pages = sysconf(_SC_PHYS_PAGES); |
| 233 | if (pages == -1 || pagesize == -1) |
| 234 | return 0; |
| 235 | |
| 236 | return (unsigned long long) pages * (unsigned long long) pagesize; |
| 237 | } |
| 238 | |
| 239 | static inline void os_random_seed(unsigned long seed, os_random_state_t *rs) |
| 240 | { |
| 241 | srand48_r(seed, rs); |
| 242 | } |
| 243 | |
| 244 | static inline long os_random_long(os_random_state_t *rs) |
| 245 | { |
| 246 | long val; |
| 247 | |
| 248 | lrand48_r(rs, &val); |
| 249 | return val; |
| 250 | } |
| 251 | |
| 252 | static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev) |
| 253 | { |
| 254 | struct raw_config_request rq; |
| 255 | int fd; |
| 256 | |
| 257 | if (major(dev) != RAW_MAJOR) |
| 258 | return 1; |
| 259 | |
| 260 | /* |
| 261 | * we should be able to find /dev/rawctl or /dev/raw/rawctl |
| 262 | */ |
| 263 | fd = open("/dev/rawctl", O_RDONLY); |
| 264 | if (fd < 0) { |
| 265 | fd = open("/dev/raw/rawctl", O_RDONLY); |
| 266 | if (fd < 0) |
| 267 | return 1; |
| 268 | } |
| 269 | |
| 270 | rq.raw_minor = minor(dev); |
| 271 | if (ioctl(fd, RAW_GETBIND, &rq) < 0) { |
| 272 | close(fd); |
| 273 | return 1; |
| 274 | } |
| 275 | |
| 276 | close(fd); |
| 277 | *majdev = rq.block_major; |
| 278 | *mindev = rq.block_minor; |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | #ifdef O_NOATIME |
| 283 | #define FIO_O_NOATIME O_NOATIME |
| 284 | #else |
| 285 | #define FIO_O_NOATIME 0 |
| 286 | #endif |
| 287 | |
| 288 | #ifdef MADV_REMOVE |
| 289 | #define FIO_MADV_FREE MADV_REMOVE |
| 290 | #endif |
| 291 | |
| 292 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 293 | #define FIO_LITTLE_ENDIAN |
| 294 | #elif __BYTE_ORDER == __BIG_ENDIAN |
| 295 | #define FIO_BIG_ENDIAN |
| 296 | #else |
| 297 | #error "Unknown endianness" |
| 298 | #endif |
| 299 | |
| 300 | #define fio_swap16(x) __bswap_16(x) |
| 301 | #define fio_swap32(x) __bswap_32(x) |
| 302 | #define fio_swap64(x) __bswap_64(x) |
| 303 | |
| 304 | #define CACHE_LINE_FILE \ |
| 305 | "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size" |
| 306 | |
| 307 | static inline int arch_cache_line_size(void) |
| 308 | { |
| 309 | char size[32]; |
| 310 | int fd, ret; |
| 311 | |
| 312 | fd = open(CACHE_LINE_FILE, O_RDONLY); |
| 313 | if (fd < 0) |
| 314 | return -1; |
| 315 | |
| 316 | ret = read(fd, size, sizeof(size)); |
| 317 | |
| 318 | close(fd); |
| 319 | |
| 320 | if (ret <= 0) |
| 321 | return -1; |
| 322 | else |
| 323 | return atoi(size); |
| 324 | } |
| 325 | |
| 326 | static inline unsigned long long get_fs_size(const char *path) |
| 327 | { |
| 328 | unsigned long long ret; |
| 329 | struct statfs s; |
| 330 | |
| 331 | if (statfs(path, &s) < 0) |
| 332 | return -1ULL; |
| 333 | |
| 334 | ret = s.f_bsize; |
| 335 | ret *= (unsigned long long) s.f_bfree; |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | static inline int os_trim(int fd, unsigned long long start, |
| 340 | unsigned long long len) |
| 341 | { |
| 342 | uint64_t range[2]; |
| 343 | |
| 344 | range[0] = start; |
| 345 | range[1] = len; |
| 346 | |
| 347 | if (!ioctl(fd, BLKDISCARD, range)) |
| 348 | return 0; |
| 349 | |
| 350 | return errno; |
| 351 | } |
| 352 | |
| 353 | #endif |