Angelo Dell'Aera (buffer@antifork.org) wrote: > On 10 Jun 2003 04:17:23 -0000 > "Biswaranjan " <biswaranjan_p@rediffmail.com> wrote: > > >Hi, > > is it by anyway possible to find out the struct page* corresponding > >to the address of the user space buffer. > > > > if thats possible i'm thinking of using kmap() to map that page to > >the kernel space. then i should be able to manipulate the buffer > >from kernel space. is it right..? > > > >i found a function in mm/memory.c struct page * vmalloc_to_page(void > >* vmalloc_addr) thats able to return the struct page* corresponding > >to a virtual address. but i think this function is valid only for > >kernel address..? > > If you want to map a user space buffer in kernel space I suggest you > to look at the use of kiobufs. You can find a very detailed > description of its use on "Linux Device Drivers 2nd edition" which you > find freely avaliable online (sorry I don't have handy the URL but > Google will help you). http://www.xml.com/ldd/chapter/book/ -- Cordialement/Regards Christophe Lucas -- Iomeda SA (clucas@iomeda.fr) Developpeur/Administrateur GNU/Linux -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
