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