Enable preadv2/pwritev2 engines by default on Linux

[fio.git] / os / os-linux.h

diff --git a/os/os-linux.h b/os/os-linux.h
index b786393f77d9ed6e596de5b63d20b7b1707d9a51..b36d33c9804cc60f1c89699c6bd1f41ca4d22e50 100644 (file)
--- a/os/os-linux.h
+++ b/os/os-linux.h
@@ -6,6 +6,7 @@
 #include <sys/ioctl.h>
 #include <sys/uio.h>
 #include <sys/syscall.h>
+#include <sys/sysmacros.h>
 #include <sys/vfs.h>
 #include <sys/mman.h>
 #include <unistd.h>
@@ -37,6 +38,7 @@
 #define FIO_HAVE_BINJECT
 #define FIO_HAVE_GETTID
 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
+#define FIO_HAVE_PWRITEV2
 
 #ifdef MAP_HUGETLB
 #define FIO_HAVE_MMAP_HUGE
@@ -247,7 +249,7 @@ static inline int arch_cache_line_size(void)
                return atoi(size);
 }
 
-static inline unsigned long long get_fs_size(const char *path)
+static inline unsigned long long get_fs_free_size(const char *path)
 {
        unsigned long long ret;
        struct statfs s;
@@ -288,4 +290,55 @@ static inline int fio_set_sched_idle(void)
 
 #define FIO_HAVE_STREAMID
 
+#ifndef RWF_HIPRI
+#define RWF_HIPRI      0x00000001
+#endif
+#ifndef RWF_DSYNC
+#define RWF_DSYNC      0x00000002
+#endif
+#ifndef RWF_SYNC
+#define RWF_SYNC       0x00000004
+#endif
+
+#ifndef CONFIG_PWRITEV2
+#ifdef __NR_preadv2
+static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
+                               off_t offset)
+{
+       *pos_l = offset & 0xffffffff;
+       *pos_h = ((uint64_t) offset) >> 32;
+
+}
+static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
+                             off_t offset, unsigned int flags)
+{
+       unsigned long pos_l, pos_h;
+
+       make_pos_h_l(&pos_h, &pos_l, offset);
+       return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
+}
+static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
+                              off_t offset, unsigned int flags)
+{
+       unsigned long pos_l, pos_h;
+
+       make_pos_h_l(&pos_h, &pos_l, offset);
+       return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
+}
+#else
+static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
+                             off_t offset, unsigned int flags)
+{
+       errno = ENOSYS;
+       return -1;
+}
+static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
+                              off_t offset, unsigned int flags)
+{
+       errno = ENOSYS;
+       return -1;
+}
+#endif /* __NR_preadv2 */
+#endif /* CONFIG_PWRITEV2 */
+
 #endif