On 2015-11-29 at 18:01 "'Davide Libenzi' via Akaros" <[email protected]> wrote: > Is there an API like that (data coming from write(), which needs to be > copy_from_user-ed to kernel side buffer)? > I would assume something like that to be already in place, but my > search failed to find it.
I think user_memdup() does what you want. Though if you're in the 9ns or a device (or somewhere that can catch an error()), if you don't need to verify the data, you can just memcpy it. For example, in k/d/d/root.c, in rootread we just do a memcpy. Part of the reason for this is that sometimes the kernel is a client of the file system. There's actually dirty hacks throughout the kernel to accommodate this. grep for TODO.*KFOP (kernel file operation). Barret -- You received this message because you are subscribed to the Google Groups "Akaros" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/d/optout.
