struct vm_area_struct

struct mm_struct *vm_mm; 所屬的address region(address)
unsigned long vm_start; 在vm_mm中的起始位置
unsigned logn vm_end; 在vm_mm中的結束位置+1
...
pgprot_t vm_page_prot; 存取權限
unsigned long vm_flags; flags
..
struct vm_operations_struct *vm_ops; 處裡的function pointer
...
unsigned long vm_pgoff; 映射起始位置是在vm_file的?offset.
struct file *vm_file; 映射的file