__u64 maxfilesize;
struct timespec time_delta; /* server time granularity */
__u32 lease_time; /* in seconds */
+ __u32 nlayouttypes; /* number of layouttypes */
__u32 layouttype[NFS_MAX_LAYOUT_TYPES]; /* supported pnfs layout driver */
__u32 blksize; /* preferred pnfs io block size */
__u32 clone_blksize; /* granularity of a CLONE operation */