Hi all,
All questions are related to linux-2.6.20.1.
file linux/mm.h has VMA struct declaration as -
struct vm_area_struct {
...
struct vm_operations_struct *vm_ops;
...
}
vma_ops is the pointer to the operations related to this VMA struct
for our process address space(i.e mm_struct) AFAIK.
My question is declaration of the struct vm_operations_struct in the
same file have some interesting members like
- open
- close
- nopage etc.
since there is an open and a close related to every VMA struct for a
process address space, does this means vm_area_struct for a process's
address space is treated like a file?( in terms with the philosophy of
almost everything is file :) ) .
Does it means accessing a virtual address space for a process is not
allowed if open fails or is not allowed?( suppose i do that
delibarately in my module ).
What if a open succeeds for a vma struct but close fails?
Am i missing something with the concept of "everything is file" ?
Thank you
--psr
--
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