#define __USE_GNU 1 #include #include #include #include "include/ceph_fs.h" #include #include #include #include "kernel/ioctl.h" main() { struct ceph_file_layout l; int fd = open("foo.txt", O_RDONLY); int r = ioctl(fd, CEPH_IOC_GET_LAYOUT, &l, sizeof(l)); printf("get = %d\n", r); l.fl_stripe_unit = 65536; l.fl_object_size = 65536; r = ioctl(fd, CEPH_IOC_SET_LAYOUT, &l, sizeof(l)); printf("set = %d\n", r); }