Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 1 | #ifndef FIO_OS_LINUX_H |
| 2 | #define FIO_OS_LINUX_H |
| 3 | |
| 4 | #include <sys/ioctl.h> |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 5 | #include <sys/uio.h> |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 6 | #include <sys/syscall.h> |
Jens Axboe | 2e3bd4c | 2010-05-17 12:29:57 +0200 | [diff] [blame] | 7 | #include <sys/vfs.h> |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 8 | #include <unistd.h> |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 9 | #include <fcntl.h> |
Jens Axboe | 3c2d93e | 2009-01-05 19:04:15 +0100 | [diff] [blame] | 10 | #include <errno.h> |
Jens Axboe | d09913c | 2009-12-16 19:23:10 +0100 | [diff] [blame] | 11 | #include <sched.h> |
Jens Axboe | ea42179 | 2006-07-11 09:11:07 +0200 | [diff] [blame] | 12 | #include <linux/unistd.h> |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 13 | #include <linux/raw.h> |
| 14 | #include <linux/major.h> |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 15 | |
Jens Axboe | f3de88a | 2008-02-24 21:36:00 +0100 | [diff] [blame] | 16 | #include "indirect.h" |
Jens Axboe | 79a4318 | 2010-09-07 13:28:58 +0200 | [diff] [blame] | 17 | #include "binject.h" |
Jens Axboe | e2e5888 | 2011-01-04 08:36:06 +0100 | [diff] [blame] | 18 | #include "../file.h" |
Jens Axboe | f3de88a | 2008-02-24 21:36:00 +0100 | [diff] [blame] | 19 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 20 | #define FIO_HAVE_LIBAIO |
| 21 | #define FIO_HAVE_POSIXAIO |
| 22 | #define FIO_HAVE_FADVISE |
| 23 | #define FIO_HAVE_CPU_AFFINITY |
| 24 | #define FIO_HAVE_DISK_UTIL |
| 25 | #define FIO_HAVE_SGIO |
Jens Axboe | ba4f892 | 2006-01-26 13:45:54 -0800 | [diff] [blame] | 26 | #define FIO_HAVE_IOPRIO |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 27 | #define FIO_HAVE_SPLICE |
Jens Axboe | 22f78b3 | 2006-06-07 11:30:07 +0200 | [diff] [blame] | 28 | #define FIO_HAVE_IOSCHED_SWITCH |
Jens Axboe | 2c0ecd2 | 2006-06-08 13:25:41 +0200 | [diff] [blame] | 29 | #define FIO_HAVE_ODIRECT |
Jens Axboe | 74b025b | 2006-12-19 15:18:14 +0100 | [diff] [blame] | 30 | #define FIO_HAVE_HUGETLB |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 31 | #define FIO_HAVE_RAWBIND |
Jens Axboe | 5e62c22 | 2007-05-22 13:27:30 +0200 | [diff] [blame] | 32 | #define FIO_HAVE_BLKTRACE |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 33 | #define FIO_HAVE_STRSEP |
Jens Axboe | fffca02 | 2008-06-02 12:23:40 +0200 | [diff] [blame] | 34 | #define FIO_HAVE_FALLOCATE |
Jens Axboe | 207cb0f | 2008-06-02 12:28:02 +0200 | [diff] [blame] | 35 | #define FIO_HAVE_POSIXAIO_FSYNC |
Jens Axboe | f356d01 | 2009-01-05 09:56:29 +0100 | [diff] [blame] | 36 | #define FIO_HAVE_PSHARED_MUTEX |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 37 | #define FIO_HAVE_CL_SIZE |
Jens Axboe | a696fa2 | 2009-12-04 10:05:02 +0100 | [diff] [blame] | 38 | #define FIO_HAVE_CGROUPS |
Jens Axboe | c36d16f | 2009-12-20 22:29:10 +0100 | [diff] [blame] | 39 | #define FIO_HAVE_FDATASYNC |
Jens Axboe | 2e3bd4c | 2010-05-17 12:29:57 +0200 | [diff] [blame] | 40 | #define FIO_HAVE_FS_STAT |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 41 | #define FIO_HAVE_TRIM |
Jens Axboe | 79a4318 | 2010-09-07 13:28:58 +0200 | [diff] [blame] | 42 | #define FIO_HAVE_BINJECT |
Bruce Cran | ecc314b | 2011-01-04 10:59:30 +0100 | [diff] [blame] | 43 | #define FIO_HAVE_CLOCK_MONOTONIC |
Jens Axboe | 47f767c | 2011-07-12 21:17:49 +0200 | [diff] [blame^] | 44 | #define FIO_HAVE_GETTID |
Jens Axboe | b6959b5 | 2007-02-14 21:40:27 +0000 | [diff] [blame] | 45 | |
Jens Axboe | 804bb9a | 2011-07-12 20:49:46 +0200 | [diff] [blame] | 46 | /* |
| 47 | * Can only enable this for newer glibcs, or the header and defines are |
| 48 | * missing |
| 49 | */ |
| 50 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 6 |
| 51 | #define FIO_HAVE_LINUX_FALLOCATE |
| 52 | #endif |
| 53 | |
Jens Axboe | 093729f | 2010-07-09 13:47:32 +0200 | [diff] [blame] | 54 | #ifdef SYNC_FILE_RANGE_WAIT_BEFORE |
| 55 | #define FIO_HAVE_SYNC_FILE_RANGE |
| 56 | #endif |
| 57 | |
Jens Axboe | dc873b6 | 2008-06-04 20:13:04 +0200 | [diff] [blame] | 58 | #define OS_MAP_ANON MAP_ANONYMOUS |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 59 | |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 60 | #ifndef CLOCK_MONOTONIC |
| 61 | #define CLOCK_MONOTONIC 1 |
| 62 | #endif |
| 63 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 64 | typedef cpu_set_t os_cpu_mask_t; |
Jens Axboe | 4e78e40 | 2008-12-12 20:40:27 +0100 | [diff] [blame] | 65 | |
Jens Axboe | 6dfd46b | 2006-06-07 13:57:06 +0200 | [diff] [blame] | 66 | typedef struct drand48_data os_random_state_t; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 67 | |
| 68 | /* |
| 69 | * we want fadvise64 really, but it's so tangled... later |
| 70 | */ |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 71 | #ifdef FIO_HAVE_FADVISE |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 72 | #define fadvise(fd, off, len, advice) \ |
| 73 | posix_fadvise((fd), (off_t)(off), (len), (advice)) |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 74 | #endif |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 75 | |
Jens Axboe | c8f025f | 2007-05-22 17:06:24 +0200 | [diff] [blame] | 76 | /* |
| 77 | * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want |
| 78 | * the affinity helpers to work. |
| 79 | */ |
| 80 | #ifndef GLIBC_2_3_2 |
Jens Axboe | e8462bd | 2009-07-06 12:59:04 +0200 | [diff] [blame] | 81 | #define fio_setaffinity(pid, cpumask) \ |
| 82 | sched_setaffinity((pid), sizeof(cpumask), &(cpumask)) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 83 | #define fio_getaffinity(pid, ptr) \ |
| 84 | sched_getaffinity((pid), sizeof(cpu_set_t), (ptr)) |
Jens Axboe | c8f025f | 2007-05-22 17:06:24 +0200 | [diff] [blame] | 85 | #else |
Jens Axboe | e8462bd | 2009-07-06 12:59:04 +0200 | [diff] [blame] | 86 | #define fio_setaffinity(pid, cpumask) \ |
| 87 | sched_setaffinity((pid), &(cpumask)) |
Jens Axboe | c8f025f | 2007-05-22 17:06:24 +0200 | [diff] [blame] | 88 | #define fio_getaffinity(pid, ptr) \ |
| 89 | sched_getaffinity((pid), (ptr)) |
| 90 | #endif |
Jens Axboe | be4ecfd | 2008-12-08 14:10:52 +0100 | [diff] [blame] | 91 | |
| 92 | #define fio_cpu_clear(mask, cpu) CPU_CLR((cpu), (mask)) |
Jens Axboe | 6d459ee | 2008-12-12 20:02:58 +0100 | [diff] [blame] | 93 | #define fio_cpu_set(mask, cpu) CPU_SET((cpu), (mask)) |
Jens Axboe | d2ce18b | 2008-12-12 20:51:40 +0100 | [diff] [blame] | 94 | |
| 95 | static inline int fio_cpuset_init(os_cpu_mask_t *mask) |
| 96 | { |
| 97 | CPU_ZERO(mask); |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static inline int fio_cpuset_exit(os_cpu_mask_t *mask) |
| 102 | { |
| 103 | return 0; |
| 104 | } |
Jens Axboe | 6d459ee | 2008-12-12 20:02:58 +0100 | [diff] [blame] | 105 | |
| 106 | #define FIO_MAX_CPUS CPU_SETSIZE |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 107 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 108 | static inline int ioprio_set(int which, int who, int ioprio) |
| 109 | { |
| 110 | return syscall(__NR_ioprio_set, which, who, ioprio); |
| 111 | } |
| 112 | |
Jens Axboe | 47f767c | 2011-07-12 21:17:49 +0200 | [diff] [blame^] | 113 | static inline int gettid(void) |
| 114 | { |
| 115 | return syscall(__NR_gettid); |
| 116 | } |
| 117 | |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 118 | /* |
| 119 | * Just check for SPLICE_F_MOVE, if that isn't there, assume the others |
| 120 | * aren't either. |
| 121 | */ |
| 122 | #ifndef SPLICE_F_MOVE |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 123 | #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ |
| 124 | #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */ |
| 125 | /* we may still block on the fd we splice */ |
| 126 | /* from/to, of course */ |
| 127 | #define SPLICE_F_MORE (0x04) /* expect more data */ |
| 128 | #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */ |
| 129 | |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 130 | static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out, |
Jens Axboe | 495ee9b | 2007-06-08 11:24:58 +0200 | [diff] [blame] | 131 | size_t len, unsigned int flags) |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 132 | { |
| 133 | return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags); |
| 134 | } |
| 135 | |
| 136 | static inline int tee(int fdin, int fdout, size_t len, unsigned int flags) |
| 137 | { |
| 138 | return syscall(__NR_sys_tee, fdin, fdout, len, flags); |
| 139 | } |
| 140 | |
| 141 | static inline int vmsplice(int fd, const struct iovec *iov, |
| 142 | unsigned long nr_segs, unsigned int flags) |
| 143 | { |
| 144 | return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags); |
| 145 | } |
| 146 | #endif |
| 147 | |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 148 | #define SPLICE_DEF_SIZE (64*1024) |
| 149 | |
Jens Axboe | b6959b5 | 2007-02-14 21:40:27 +0000 | [diff] [blame] | 150 | #ifdef FIO_HAVE_SYSLET |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 151 | |
| 152 | struct syslet_uatom; |
| 153 | struct async_head_user; |
| 154 | |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 155 | /* |
| 156 | * syslet stuff |
| 157 | */ |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 158 | static inline struct syslet_uatom * |
| 159 | async_exec(struct syslet_uatom *atom, struct async_head_user *ahu) |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 160 | { |
Daniel Rall | 2b52511 | 2008-09-10 08:56:01 +0200 | [diff] [blame] | 161 | return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu); |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 162 | } |
| 163 | |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 164 | static inline long |
| 165 | async_wait(unsigned long min_wait_events, unsigned long user_ring_idx, |
| 166 | struct async_head_user *ahu) |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 167 | { |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 168 | return syscall(__NR_async_wait, min_wait_events, |
| 169 | user_ring_idx, ahu); |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 170 | } |
| 171 | |
Jens Axboe | 7756b0d | 2007-02-26 10:22:31 +0100 | [diff] [blame] | 172 | static inline long async_thread(void *event, struct async_head_user *ahu) |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 173 | { |
Jens Axboe | 7756b0d | 2007-02-26 10:22:31 +0100 | [diff] [blame] | 174 | return syscall(__NR_async_thread, event, ahu); |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | static inline long umem_add(unsigned long *uptr, unsigned long inc) |
| 178 | { |
| 179 | return syscall(__NR_umem_add, uptr, inc); |
| 180 | } |
Jens Axboe | b6959b5 | 2007-02-14 21:40:27 +0000 | [diff] [blame] | 181 | #endif /* FIO_HAVE_SYSLET */ |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 182 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 183 | enum { |
Jens Axboe | 6cefbe3 | 2007-04-18 12:46:56 +0200 | [diff] [blame] | 184 | IOPRIO_CLASS_NONE, |
| 185 | IOPRIO_CLASS_RT, |
| 186 | IOPRIO_CLASS_BE, |
| 187 | IOPRIO_CLASS_IDLE, |
| 188 | }; |
| 189 | |
| 190 | enum { |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 191 | IOPRIO_WHO_PROCESS = 1, |
| 192 | IOPRIO_WHO_PGRP, |
| 193 | IOPRIO_WHO_USER, |
| 194 | }; |
| 195 | |
Jens Axboe | 6cefbe3 | 2007-04-18 12:46:56 +0200 | [diff] [blame] | 196 | #define IOPRIO_BITS 16 |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 197 | #define IOPRIO_CLASS_SHIFT 13 |
| 198 | |
| 199 | #ifndef BLKGETSIZE64 |
| 200 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) |
| 201 | #endif |
| 202 | |
Jens Axboe | e5b401d | 2006-10-18 16:03:40 +0200 | [diff] [blame] | 203 | #ifndef BLKFLSBUF |
| 204 | #define BLKFLSBUF _IO(0x12,97) |
| 205 | #endif |
| 206 | |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 207 | #ifndef BLKDISCARD |
| 208 | #define BLKDISCARD _IO(0x12,119) |
| 209 | #endif |
| 210 | |
Jens Axboe | e2e5888 | 2011-01-04 08:36:06 +0100 | [diff] [blame] | 211 | static inline int blockdev_invalidate_cache(struct fio_file *f) |
Jens Axboe | e5b401d | 2006-10-18 16:03:40 +0200 | [diff] [blame] | 212 | { |
Bruce Cran | ecc314b | 2011-01-04 10:59:30 +0100 | [diff] [blame] | 213 | return ioctl(f->fd, BLKFLSBUF); |
Jens Axboe | e5b401d | 2006-10-18 16:03:40 +0200 | [diff] [blame] | 214 | } |
| 215 | |
Bruce Cran | ecc314b | 2011-01-04 10:59:30 +0100 | [diff] [blame] | 216 | static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 217 | { |
Bruce Cran | ecc314b | 2011-01-04 10:59:30 +0100 | [diff] [blame] | 218 | if (!ioctl(f->fd, BLKGETSIZE64, bytes)) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 219 | return 0; |
| 220 | |
| 221 | return errno; |
| 222 | } |
| 223 | |
Jens Axboe | 32cd46a | 2006-06-07 13:40:40 +0200 | [diff] [blame] | 224 | static inline unsigned long long os_phys_mem(void) |
| 225 | { |
| 226 | long pagesize, pages; |
| 227 | |
| 228 | pagesize = sysconf(_SC_PAGESIZE); |
| 229 | pages = sysconf(_SC_PHYS_PAGES); |
| 230 | if (pages == -1 || pagesize == -1) |
| 231 | return 0; |
| 232 | |
| 233 | return (unsigned long long) pages * (unsigned long long) pagesize; |
| 234 | } |
| 235 | |
Jens Axboe | 6dfd46b | 2006-06-07 13:57:06 +0200 | [diff] [blame] | 236 | static inline void os_random_seed(unsigned long seed, os_random_state_t *rs) |
| 237 | { |
| 238 | srand48_r(seed, rs); |
| 239 | } |
| 240 | |
| 241 | static inline long os_random_long(os_random_state_t *rs) |
| 242 | { |
| 243 | long val; |
| 244 | |
| 245 | lrand48_r(rs, &val); |
| 246 | return val; |
| 247 | } |
| 248 | |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 249 | static inline int fio_lookup_raw(dev_t dev, int *majdev, int *mindev) |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 250 | { |
| 251 | struct raw_config_request rq; |
| 252 | int fd; |
| 253 | |
| 254 | if (major(dev) != RAW_MAJOR) |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 255 | return 1; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 256 | |
| 257 | /* |
| 258 | * we should be able to find /dev/rawctl or /dev/raw/rawctl |
| 259 | */ |
| 260 | fd = open("/dev/rawctl", O_RDONLY); |
| 261 | if (fd < 0) { |
| 262 | fd = open("/dev/raw/rawctl", O_RDONLY); |
| 263 | if (fd < 0) |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 264 | return 1; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | rq.raw_minor = minor(dev); |
| 268 | if (ioctl(fd, RAW_GETBIND, &rq) < 0) { |
| 269 | close(fd); |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 270 | return 1; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | close(fd); |
| 274 | *majdev = rq.block_major; |
| 275 | *mindev = rq.block_minor; |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 276 | return 0; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 277 | } |
| 278 | |
Jens Axboe | 5b6f5c6 | 2008-06-11 10:21:43 +0200 | [diff] [blame] | 279 | #ifdef O_NOATIME |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 280 | #define FIO_O_NOATIME O_NOATIME |
Jens Axboe | 5b6f5c6 | 2008-06-11 10:21:43 +0200 | [diff] [blame] | 281 | #else |
| 282 | #define FIO_O_NOATIME 0 |
| 283 | #endif |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 284 | |
Jens Axboe | a1c5807 | 2009-08-04 23:17:02 +0200 | [diff] [blame] | 285 | #ifdef MADV_REMOVE |
| 286 | #define FIO_MADV_FREE MADV_REMOVE |
| 287 | #endif |
| 288 | |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 289 | #define CACHE_LINE_FILE \ |
| 290 | "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size" |
| 291 | |
| 292 | static inline int arch_cache_line_size(void) |
| 293 | { |
| 294 | char size[32]; |
| 295 | int fd, ret; |
| 296 | |
| 297 | fd = open(CACHE_LINE_FILE, O_RDONLY); |
| 298 | if (fd < 0) |
| 299 | return -1; |
| 300 | |
| 301 | ret = read(fd, size, sizeof(size)); |
Jens Axboe | ec76f15 | 2009-06-09 13:05:32 +0200 | [diff] [blame] | 302 | |
| 303 | close(fd); |
| 304 | |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 305 | if (ret <= 0) |
| 306 | return -1; |
Jens Axboe | ec76f15 | 2009-06-09 13:05:32 +0200 | [diff] [blame] | 307 | else |
| 308 | return atoi(size); |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 309 | } |
| 310 | |
Jens Axboe | 2e3bd4c | 2010-05-17 12:29:57 +0200 | [diff] [blame] | 311 | static inline unsigned long long get_fs_size(const char *path) |
| 312 | { |
| 313 | unsigned long long ret; |
| 314 | struct statfs s; |
| 315 | |
| 316 | if (statfs(path, &s) < 0) |
| 317 | return -1ULL; |
| 318 | |
| 319 | ret = s.f_bsize; |
| 320 | ret *= (unsigned long long) s.f_bfree; |
| 321 | return ret; |
| 322 | } |
| 323 | |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 324 | static inline int os_trim(int fd, unsigned long long start, |
| 325 | unsigned long long len) |
| 326 | { |
| 327 | uint64_t range[2]; |
| 328 | |
| 329 | range[0] = start; |
| 330 | range[1] = len; |
| 331 | |
| 332 | if (!ioctl(fd, BLKDISCARD, range)) |
| 333 | return 0; |
| 334 | |
| 335 | return errno; |
| 336 | } |
| 337 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 338 | #endif |