int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
- struct opendata *, unsigned open_flag,
+ struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
locking rules: