* how to deal with page
@ 2014-03-06 9:20 于运超
2014-03-07 2:34 ` Freeman Zhang
0 siblings, 1 reply; 2+ messages in thread
From: 于运超 @ 2014-03-06 9:20 UTC (permalink / raw)
To: kernelnewbies
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.
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* how to deal with page
2014-03-06 9:20 how to deal with page 于运超
@ 2014-03-07 2:34 ` Freeman Zhang
0 siblings, 0 replies; 2+ messages in thread
From: Freeman Zhang @ 2014-03-07 2:34 UTC (permalink / raw)
To: kernelnewbies
Hi,
2014-03-06 17:20 ???:
> 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
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