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 <sys/mman.h> 11#include <unistd.h> 12#include <fcntl.h> 13#include <errno.h> 14#include <sched.h> 15#include <linux/unistd.h> 16#include <linux/raw.h> 17#include <linux/major.h> 18#include <byteswap.h> 19 20#include "binject.h" 21#include "../file.h" 22 23#define FIO_HAVE_CPU_AFFINITY 24#define FIO_HAVE_DISK_UTIL 25#define FIO_HAVE_SGIO 26#define FIO_HAVE_IOPRIO 27#define FIO_HAVE_IOSCHED_SWITCH 28#define FIO_HAVE_ODIRECT 29#define FIO_HAVE_HUGETLB 30#define FIO_HAVE_RAWBIND 31#define FIO_HAVE_BLKTRACE 32#define FIO_HAVE_PSHARED_MUTEX 33#define FIO_HAVE_CL_SIZE 34#define FIO_HAVE_CGROUPS 35#define FIO_HAVE_FS_STAT 36#define FIO_HAVE_TRIM 37#define FIO_HAVE_BINJECT 38#define FIO_HAVE_GETTID 39#define FIO_USE_GENERIC_INIT_RANDOM_STATE 40 41#ifdef MAP_HUGETLB 42#define FIO_HAVE_MMAP_HUGE 43#endif 44 45#define OS_MAP_ANON MAP_ANONYMOUS 46 47typedef cpu_set_t os_cpu_mask_t; 48 49typedef struct drand48_data os_random_state_t; 50 51#ifdef CONFIG_3ARG_AFFINITY 52#define fio_setaffinity(pid, cpumask) \ 53 sched_setaffinity((pid), sizeof(cpumask), &(cpumask)) 54#define fio_getaffinity(pid, ptr) \ 55 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr)) 56#elif defined(CONFIG_2ARG_AFFINITY) 57#define fio_setaffinity(pid, cpumask) \ 58 sched_setaffinity((pid), &(cpumask)) 59#define fio_getaffinity(pid, ptr) \ 60 sched_getaffinity((pid), (ptr)) 61#endif 62 63#define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask)) 64#define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask)) 65#define fio_cpu_isset(mask, cpu) CPU_ISSET((cpu), (mask)) 66#define fio_cpu_count(mask) CPU_COUNT((mask)) 67 68static inline int fio_cpuset_init(os_cpu_mask_t *mask) 69{ 70 CPU_ZERO(mask); 71 return 0; 72} 73 74static inline int fio_cpuset_exit(os_cpu_mask_t *mask) 75{ 76 return 0; 77} 78 79#define FIO_MAX_CPUS CPU_SETSIZE 80 81enum { 82 IOPRIO_CLASS_NONE, 83 IOPRIO_CLASS_RT, 84 IOPRIO_CLASS_BE, 85 IOPRIO_CLASS_IDLE, 86}; 87 88enum { 89 IOPRIO_WHO_PROCESS = 1, 90 IOPRIO_WHO_PGRP, 91 IOPRIO_WHO_USER, 92}; 93 94#define IOPRIO_BITS 16 95#define IOPRIO_CLASS_SHIFT 13 96 97static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio) 98{ 99 /* 100 * If no class is set, assume BE 101 */ 102 if (!ioprio_class) 103 ioprio_class = IOPRIO_CLASS_BE; 104 105 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT; 106 return syscall(__NR_ioprio_set, which, who, ioprio); 107} 108 109static inline int gettid(void) 110{ 111 return syscall(__NR_gettid); 112} 113 114#define SPLICE_DEF_SIZE (64*1024) 115 116#ifndef BLKGETSIZE64 117#define BLKGETSIZE64 _IOR(0x12,114,size_t) 118#endif 119 120#ifndef BLKFLSBUF 121#define BLKFLSBUF _IO(0x12,97) 122#endif 123 124#ifndef BLKDISCARD 125#define BLKDISCARD _IO(0x12,119) 126#endif 127 128static inline int blockdev_invalidate_cache(struct fio_file *f) 129{ 130 return ioctl(f->fd, BLKFLSBUF); 131} 132 133static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes) 134{ 135 if (!ioctl(f->fd, BLKGETSIZE64, bytes)) 136 return 0; 137 138 return errno; 139} 140 141static inline unsigned long long os_phys_mem(void) 142{ 143 long pagesize, pages; 144 145 pagesize = sysconf(_SC_PAGESIZE); 146 pages = sysconf(_SC_PHYS_PAGES); 147 if (pages == -1 || pagesize == -1) 148 return 0; 149 150 return (unsigned long long) pages * (unsigned long long) pagesize; 151} 152 153static inline void os_random_seed(unsigned long seed, os_random_state_t *rs) 154{ 155 srand48_r(seed, rs); 156} 157 158static inline long os_random_long(os_random_state_t *rs) 159{ 160 long val; 161 162 lrand48_r(rs, &val); 163 return val; 164} 165 166static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev) 167{ 168 struct raw_config_request rq; 169 int fd; 170 171 if (major(dev) != RAW_MAJOR) 172 return 1; 173 174 /* 175 * we should be able to find /dev/rawctl or /dev/raw/rawctl 176 */ 177 fd = open("/dev/rawctl", O_RDONLY); 178 if (fd < 0) { 179 fd = open("/dev/raw/rawctl", O_RDONLY); 180 if (fd < 0) 181 return 1; 182 } 183 184 rq.raw_minor = minor(dev); 185 if (ioctl(fd, RAW_GETBIND, &rq) < 0) { 186 close(fd); 187 return 1; 188 } 189 190 close(fd); 191 *majdev = rq.block_major; 192 *mindev = rq.block_minor; 193 return 0; 194} 195 196#ifdef O_NOATIME 197#define FIO_O_NOATIME O_NOATIME 198#else 199#define FIO_O_NOATIME 0 200#endif 201 202#ifdef O_ATOMIC 203#define OS_O_ATOMIC O_ATOMIC 204#else 205#define OS_O_ATOMIC 040000000 206#endif 207 208#ifdef MADV_REMOVE 209#define FIO_MADV_FREE MADV_REMOVE 210#endif 211 212#if defined(__builtin_bswap16) 213#define fio_swap16(x) __builtin_bswap16(x) 214#else 215#define fio_swap16(x) __bswap_16(x) 216#endif 217#if defined(__builtin_bswap32) 218#define fio_swap32(x) __builtin_bswap32(x) 219#else 220#define fio_swap32(x) __bswap_32(x) 221#endif 222#if defined(__builtin_bswap64) 223#define fio_swap64(x) __builtin_bswap64(x) 224#else 225#define fio_swap64(x) __bswap_64(x) 226#endif 227 228#define CACHE_LINE_FILE \ 229 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size" 230 231static inline int arch_cache_line_size(void) 232{ 233 char size[32]; 234 int fd, ret; 235 236 fd = open(CACHE_LINE_FILE, O_RDONLY); 237 if (fd < 0) 238 return -1; 239 240 ret = read(fd, size, sizeof(size)); 241 242 close(fd); 243 244 if (ret <= 0) 245 return -1; 246 else 247 return atoi(size); 248} 249 250static inline unsigned long long get_fs_size(const char *path) 251{ 252 unsigned long long ret; 253 struct statfs s; 254 255 if (statfs(path, &s) < 0) 256 return -1ULL; 257 258 ret = s.f_bsize; 259 ret *= (unsigned long long) s.f_bfree; 260 return ret; 261} 262 263static inline int os_trim(int fd, unsigned long long start, 264 unsigned long long len) 265{ 266 uint64_t range[2]; 267 268 range[0] = start; 269 range[1] = len; 270 271 if (!ioctl(fd, BLKDISCARD, range)) 272 return 0; 273 274 return errno; 275} 276 277#ifdef CONFIG_SCHED_IDLE 278static inline int fio_set_sched_idle(void) 279{ 280 struct sched_param p = { .sched_priority = 0, }; 281 return sched_setscheduler(gettid(), SCHED_IDLE, &p); 282} 283#endif 284 285#endif 286