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 | f3de88a | 2008-02-24 21:36:00 +0100 | [diff] [blame] | 18 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 19 | #define FIO_HAVE_LIBAIO |
| 20 | #define FIO_HAVE_POSIXAIO |
| 21 | #define FIO_HAVE_FADVISE |
| 22 | #define FIO_HAVE_CPU_AFFINITY |
| 23 | #define FIO_HAVE_DISK_UTIL |
| 24 | #define FIO_HAVE_SGIO |
Jens Axboe | ba4f892 | 2006-01-26 13:45:54 -0800 | [diff] [blame] | 25 | #define FIO_HAVE_IOPRIO |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 26 | #define FIO_HAVE_SPLICE |
Jens Axboe | 22f78b3 | 2006-06-07 11:30:07 +0200 | [diff] [blame] | 27 | #define FIO_HAVE_IOSCHED_SWITCH |
Jens Axboe | 2c0ecd2 | 2006-06-08 13:25:41 +0200 | [diff] [blame] | 28 | #define FIO_HAVE_ODIRECT |
Jens Axboe | 74b025b | 2006-12-19 15:18:14 +0100 | [diff] [blame] | 29 | #define FIO_HAVE_HUGETLB |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 30 | #define FIO_HAVE_RAWBIND |
Jens Axboe | 5e62c22 | 2007-05-22 13:27:30 +0200 | [diff] [blame] | 31 | #define FIO_HAVE_BLKTRACE |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 32 | #define FIO_HAVE_STRSEP |
Jens Axboe | fffca02 | 2008-06-02 12:23:40 +0200 | [diff] [blame] | 33 | #define FIO_HAVE_FALLOCATE |
Jens Axboe | 207cb0f | 2008-06-02 12:28:02 +0200 | [diff] [blame] | 34 | #define FIO_HAVE_POSIXAIO_FSYNC |
Jens Axboe | f356d01 | 2009-01-05 09:56:29 +0100 | [diff] [blame] | 35 | #define FIO_HAVE_PSHARED_MUTEX |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 36 | #define FIO_HAVE_CL_SIZE |
Jens Axboe | a696fa2 | 2009-12-04 10:05:02 +0100 | [diff] [blame] | 37 | #define FIO_HAVE_CGROUPS |
Jens Axboe | c36d16f | 2009-12-20 22:29:10 +0100 | [diff] [blame] | 38 | #define FIO_HAVE_FDATASYNC |
Jens Axboe | 2e3bd4c | 2010-05-17 12:29:57 +0200 | [diff] [blame] | 39 | #define FIO_HAVE_FS_STAT |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 40 | #define FIO_HAVE_TRIM |
Jens Axboe | 79a4318 | 2010-09-07 13:28:58 +0200 | [diff] [blame^] | 41 | #define FIO_HAVE_BINJECT |
Jens Axboe | b6959b5 | 2007-02-14 21:40:27 +0000 | [diff] [blame] | 42 | |
Jens Axboe | 093729f | 2010-07-09 13:47:32 +0200 | [diff] [blame] | 43 | #ifdef SYNC_FILE_RANGE_WAIT_BEFORE |
| 44 | #define FIO_HAVE_SYNC_FILE_RANGE |
| 45 | #endif |
| 46 | |
Jens Axboe | dc873b6 | 2008-06-04 20:13:04 +0200 | [diff] [blame] | 47 | #define OS_MAP_ANON MAP_ANONYMOUS |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 48 | |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 49 | #ifndef CLOCK_MONOTONIC |
| 50 | #define CLOCK_MONOTONIC 1 |
| 51 | #endif |
| 52 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 53 | typedef cpu_set_t os_cpu_mask_t; |
Jens Axboe | 4e78e40 | 2008-12-12 20:40:27 +0100 | [diff] [blame] | 54 | |
Jens Axboe | 6dfd46b | 2006-06-07 13:57:06 +0200 | [diff] [blame] | 55 | typedef struct drand48_data os_random_state_t; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | * we want fadvise64 really, but it's so tangled... later |
| 59 | */ |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 60 | #ifdef FIO_HAVE_FADVISE |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 61 | #define fadvise(fd, off, len, advice) \ |
| 62 | posix_fadvise((fd), (off_t)(off), (len), (advice)) |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 63 | #endif |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 64 | |
Jens Axboe | c8f025f | 2007-05-22 17:06:24 +0200 | [diff] [blame] | 65 | /* |
| 66 | * If you are on an ancient glibc (2.3.2), then define GLIBC_2_3_2 if you want |
| 67 | * the affinity helpers to work. |
| 68 | */ |
| 69 | #ifndef GLIBC_2_3_2 |
Jens Axboe | e8462bd | 2009-07-06 12:59:04 +0200 | [diff] [blame] | 70 | #define fio_setaffinity(pid, cpumask) \ |
| 71 | sched_setaffinity((pid), sizeof(cpumask), &(cpumask)) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 72 | #define fio_getaffinity(pid, ptr) \ |
| 73 | sched_getaffinity((pid), sizeof(cpu_set_t), (ptr)) |
Jens Axboe | c8f025f | 2007-05-22 17:06:24 +0200 | [diff] [blame] | 74 | #else |
Jens Axboe | e8462bd | 2009-07-06 12:59:04 +0200 | [diff] [blame] | 75 | #define fio_setaffinity(pid, cpumask) \ |
| 76 | sched_setaffinity((pid), &(cpumask)) |
Jens Axboe | c8f025f | 2007-05-22 17:06:24 +0200 | [diff] [blame] | 77 | #define fio_getaffinity(pid, ptr) \ |
| 78 | sched_getaffinity((pid), (ptr)) |
| 79 | #endif |
Jens Axboe | be4ecfd | 2008-12-08 14:10:52 +0100 | [diff] [blame] | 80 | |
| 81 | #define fio_cpu_clear(mask, cpu) CPU_CLR((cpu), (mask)) |
Jens Axboe | 6d459ee | 2008-12-12 20:02:58 +0100 | [diff] [blame] | 82 | #define fio_cpu_set(mask, cpu) CPU_SET((cpu), (mask)) |
Jens Axboe | d2ce18b | 2008-12-12 20:51:40 +0100 | [diff] [blame] | 83 | |
| 84 | static inline int fio_cpuset_init(os_cpu_mask_t *mask) |
| 85 | { |
| 86 | CPU_ZERO(mask); |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static inline int fio_cpuset_exit(os_cpu_mask_t *mask) |
| 91 | { |
| 92 | return 0; |
| 93 | } |
Jens Axboe | 6d459ee | 2008-12-12 20:02:58 +0100 | [diff] [blame] | 94 | |
| 95 | #define FIO_MAX_CPUS CPU_SETSIZE |
Shawn Lewis | 4d8947d | 2007-07-25 07:51:58 +0200 | [diff] [blame] | 96 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 97 | static inline int ioprio_set(int which, int who, int ioprio) |
| 98 | { |
| 99 | return syscall(__NR_ioprio_set, which, who, ioprio); |
| 100 | } |
| 101 | |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 102 | /* |
| 103 | * Just check for SPLICE_F_MOVE, if that isn't there, assume the others |
| 104 | * aren't either. |
| 105 | */ |
| 106 | #ifndef SPLICE_F_MOVE |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 107 | #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ |
| 108 | #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */ |
| 109 | /* we may still block on the fd we splice */ |
| 110 | /* from/to, of course */ |
| 111 | #define SPLICE_F_MORE (0x04) /* expect more data */ |
| 112 | #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */ |
| 113 | |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 114 | 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] | 115 | size_t len, unsigned int flags) |
Jens Axboe | 97fbdfa | 2006-10-05 13:44:15 +0200 | [diff] [blame] | 116 | { |
| 117 | return syscall(__NR_sys_splice, fdin, off_in, fdout, off_out, len, flags); |
| 118 | } |
| 119 | |
| 120 | static inline int tee(int fdin, int fdout, size_t len, unsigned int flags) |
| 121 | { |
| 122 | return syscall(__NR_sys_tee, fdin, fdout, len, flags); |
| 123 | } |
| 124 | |
| 125 | static inline int vmsplice(int fd, const struct iovec *iov, |
| 126 | unsigned long nr_segs, unsigned int flags) |
| 127 | { |
| 128 | return syscall(__NR_sys_vmsplice, fd, iov, nr_segs, flags); |
| 129 | } |
| 130 | #endif |
| 131 | |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 132 | #define SPLICE_DEF_SIZE (64*1024) |
| 133 | |
Jens Axboe | b6959b5 | 2007-02-14 21:40:27 +0000 | [diff] [blame] | 134 | #ifdef FIO_HAVE_SYSLET |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 135 | |
| 136 | struct syslet_uatom; |
| 137 | struct async_head_user; |
| 138 | |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 139 | /* |
| 140 | * syslet stuff |
| 141 | */ |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 142 | static inline struct syslet_uatom * |
| 143 | async_exec(struct syslet_uatom *atom, struct async_head_user *ahu) |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 144 | { |
Daniel Rall | 2b52511 | 2008-09-10 08:56:01 +0200 | [diff] [blame] | 145 | return (struct syslet_uatom *) syscall(__NR_async_exec, atom, ahu); |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 146 | } |
| 147 | |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 148 | static inline long |
| 149 | async_wait(unsigned long min_wait_events, unsigned long user_ring_idx, |
| 150 | struct async_head_user *ahu) |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 151 | { |
Ingo Molnar | bf0dc8f | 2007-02-21 23:25:44 +0100 | [diff] [blame] | 152 | return syscall(__NR_async_wait, min_wait_events, |
| 153 | user_ring_idx, ahu); |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Jens Axboe | 7756b0d | 2007-02-26 10:22:31 +0100 | [diff] [blame] | 156 | static inline long async_thread(void *event, struct async_head_user *ahu) |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 157 | { |
Jens Axboe | 7756b0d | 2007-02-26 10:22:31 +0100 | [diff] [blame] | 158 | return syscall(__NR_async_thread, event, ahu); |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | static inline long umem_add(unsigned long *uptr, unsigned long inc) |
| 162 | { |
| 163 | return syscall(__NR_umem_add, uptr, inc); |
| 164 | } |
Jens Axboe | b6959b5 | 2007-02-14 21:40:27 +0000 | [diff] [blame] | 165 | #endif /* FIO_HAVE_SYSLET */ |
Jens Axboe | a4f4fdd | 2007-02-14 01:16:39 +0100 | [diff] [blame] | 166 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 167 | enum { |
Jens Axboe | 6cefbe3 | 2007-04-18 12:46:56 +0200 | [diff] [blame] | 168 | IOPRIO_CLASS_NONE, |
| 169 | IOPRIO_CLASS_RT, |
| 170 | IOPRIO_CLASS_BE, |
| 171 | IOPRIO_CLASS_IDLE, |
| 172 | }; |
| 173 | |
| 174 | enum { |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 175 | IOPRIO_WHO_PROCESS = 1, |
| 176 | IOPRIO_WHO_PGRP, |
| 177 | IOPRIO_WHO_USER, |
| 178 | }; |
| 179 | |
Jens Axboe | 6cefbe3 | 2007-04-18 12:46:56 +0200 | [diff] [blame] | 180 | #define IOPRIO_BITS 16 |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 181 | #define IOPRIO_CLASS_SHIFT 13 |
| 182 | |
| 183 | #ifndef BLKGETSIZE64 |
| 184 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) |
| 185 | #endif |
| 186 | |
Jens Axboe | e5b401d | 2006-10-18 16:03:40 +0200 | [diff] [blame] | 187 | #ifndef BLKFLSBUF |
| 188 | #define BLKFLSBUF _IO(0x12,97) |
| 189 | #endif |
| 190 | |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 191 | #ifndef BLKDISCARD |
| 192 | #define BLKDISCARD _IO(0x12,119) |
| 193 | #endif |
| 194 | |
Jens Axboe | e5b401d | 2006-10-18 16:03:40 +0200 | [diff] [blame] | 195 | static inline int blockdev_invalidate_cache(int fd) |
| 196 | { |
Jens Axboe | a16211b | 2007-03-15 11:35:33 +0100 | [diff] [blame] | 197 | return ioctl(fd, BLKFLSBUF); |
Jens Axboe | e5b401d | 2006-10-18 16:03:40 +0200 | [diff] [blame] | 198 | } |
| 199 | |
Jens Axboe | 9104f87 | 2005-12-28 23:50:45 +0100 | [diff] [blame] | 200 | static inline int blockdev_size(int fd, unsigned long long *bytes) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 201 | { |
| 202 | if (!ioctl(fd, BLKGETSIZE64, bytes)) |
| 203 | return 0; |
| 204 | |
| 205 | return errno; |
| 206 | } |
| 207 | |
Jens Axboe | 32cd46a | 2006-06-07 13:40:40 +0200 | [diff] [blame] | 208 | static inline unsigned long long os_phys_mem(void) |
| 209 | { |
| 210 | long pagesize, pages; |
| 211 | |
| 212 | pagesize = sysconf(_SC_PAGESIZE); |
| 213 | pages = sysconf(_SC_PHYS_PAGES); |
| 214 | if (pages == -1 || pagesize == -1) |
| 215 | return 0; |
| 216 | |
| 217 | return (unsigned long long) pages * (unsigned long long) pagesize; |
| 218 | } |
| 219 | |
Jens Axboe | 6dfd46b | 2006-06-07 13:57:06 +0200 | [diff] [blame] | 220 | static inline void os_random_seed(unsigned long seed, os_random_state_t *rs) |
| 221 | { |
| 222 | srand48_r(seed, rs); |
| 223 | } |
| 224 | |
| 225 | static inline long os_random_long(os_random_state_t *rs) |
| 226 | { |
| 227 | long val; |
| 228 | |
| 229 | lrand48_r(rs, &val); |
| 230 | return val; |
| 231 | } |
| 232 | |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 233 | 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] | 234 | { |
| 235 | struct raw_config_request rq; |
| 236 | int fd; |
| 237 | |
| 238 | if (major(dev) != RAW_MAJOR) |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 239 | return 1; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 240 | |
| 241 | /* |
| 242 | * we should be able to find /dev/rawctl or /dev/raw/rawctl |
| 243 | */ |
| 244 | fd = open("/dev/rawctl", O_RDONLY); |
| 245 | if (fd < 0) { |
| 246 | fd = open("/dev/raw/rawctl", O_RDONLY); |
| 247 | if (fd < 0) |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 248 | return 1; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | rq.raw_minor = minor(dev); |
| 252 | if (ioctl(fd, RAW_GETBIND, &rq) < 0) { |
| 253 | close(fd); |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 254 | return 1; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | close(fd); |
| 258 | *majdev = rq.block_major; |
| 259 | *mindev = rq.block_minor; |
Jens Axboe | 8cc7afa | 2007-04-17 09:06:43 +0200 | [diff] [blame] | 260 | return 0; |
Jens Axboe | 07e5b26 | 2007-04-02 14:46:07 +0200 | [diff] [blame] | 261 | } |
| 262 | |
Jens Axboe | 5b6f5c6 | 2008-06-11 10:21:43 +0200 | [diff] [blame] | 263 | #ifdef O_NOATIME |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 264 | #define FIO_O_NOATIME O_NOATIME |
Jens Axboe | 5b6f5c6 | 2008-06-11 10:21:43 +0200 | [diff] [blame] | 265 | #else |
| 266 | #define FIO_O_NOATIME 0 |
| 267 | #endif |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 268 | |
Jens Axboe | a1c5807 | 2009-08-04 23:17:02 +0200 | [diff] [blame] | 269 | #ifdef MADV_REMOVE |
| 270 | #define FIO_MADV_FREE MADV_REMOVE |
| 271 | #endif |
| 272 | |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 273 | #define CACHE_LINE_FILE \ |
| 274 | "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size" |
| 275 | |
| 276 | static inline int arch_cache_line_size(void) |
| 277 | { |
| 278 | char size[32]; |
| 279 | int fd, ret; |
| 280 | |
| 281 | fd = open(CACHE_LINE_FILE, O_RDONLY); |
| 282 | if (fd < 0) |
| 283 | return -1; |
| 284 | |
| 285 | ret = read(fd, size, sizeof(size)); |
Jens Axboe | ec76f15 | 2009-06-09 13:05:32 +0200 | [diff] [blame] | 286 | |
| 287 | close(fd); |
| 288 | |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 289 | if (ret <= 0) |
| 290 | return -1; |
Jens Axboe | ec76f15 | 2009-06-09 13:05:32 +0200 | [diff] [blame] | 291 | else |
| 292 | return atoi(size); |
Jens Axboe | eb7ccf3 | 2009-04-29 09:48:04 +0200 | [diff] [blame] | 293 | } |
| 294 | |
Jens Axboe | 2e3bd4c | 2010-05-17 12:29:57 +0200 | [diff] [blame] | 295 | static inline unsigned long long get_fs_size(const char *path) |
| 296 | { |
| 297 | unsigned long long ret; |
| 298 | struct statfs s; |
| 299 | |
| 300 | if (statfs(path, &s) < 0) |
| 301 | return -1ULL; |
| 302 | |
| 303 | ret = s.f_bsize; |
| 304 | ret *= (unsigned long long) s.f_bfree; |
| 305 | return ret; |
| 306 | } |
| 307 | |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 308 | static inline int os_trim(int fd, unsigned long long start, |
| 309 | unsigned long long len) |
| 310 | { |
| 311 | uint64_t range[2]; |
| 312 | |
| 313 | range[0] = start; |
| 314 | range[1] = len; |
| 315 | |
| 316 | if (!ioctl(fd, BLKDISCARD, range)) |
| 317 | return 0; |
| 318 | |
| 319 | return errno; |
| 320 | } |
| 321 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 322 | #endif |