Hi, 2014-03-06 17:20 于运超:

Hi. nowdays i am studing Transparent encryption in linux system. when reading file needs do_generic_file_read function decrpty file. but in do_generic_file_read Physical data using struct page ,how did i use page decrpty. Maybe you need to do en/decryption in the address_space operations, which is used with struct page. The do_generic_file_read will evoke the page->mapping->a_ops->readpage, and the readpage is one of the address_space operations. So I guess that's what you want. Hope this can help!

Regards, Freeman Zhang