Hi!

I have a couple of questions about the memory paging in the Linux kernel.

1) For security reasons I would like to be able to see the file name of a file being paged. In mpage_readpage(s) the page is assembled. I thought maybe I could use the address_space->inode->i_dentry somehow. It seems that the dentry-struct contains the information I'm interested in. However, the i_dentry variable in the inode is only linked list without any actual data, as far as I can see. This i_dentry variable has type struct list_head, and this only contains next- and prev-pointers and no data
Any suggestions on how to proceed? Am I on the right track here, or can I get a hold of the file name information in some other way while paging?

2) From mpage_readpage(s) (again) I get the pages assembled. I would like to be able to see if a page that is assembled is the last page of the file. Is there any way of doing this, and how in that case?

Any help much appreciated!

Best Regards
/Rita

Once the file is open, the name is effectively meaningless - that's what the file handle is for. The kernel devs seem quite miserly re wasting kernel storage for meaningless data.
My understanding is that (only) the last element of the filename (think basename) is in the dcache.

Reverse lookup would require knowledge of the particular filesystem structure - that's not VFS job. And would be a huge overhead.