Trying to export per process network bandwidth stats under /proc/[pid]/

Hello!

I'm trying to add a proc entry under /proc/[pid] in order to get per process network bandwidth stats. I suppose it's similar to /proc/[pid]/io . However I couldn't find a modular way to add entries under /proc/[pid]. This thread
https://lists.kernelnewbies.org/pipermail/kernelnewbies/2011-January/000475.html
suggests modifying the kernel which isn't practical to me. Here is what I've found by going through a bit of the related kernel code.

1. I need to find a way to override or hooking sock_sendmsg/sock_recvmsg functions with accounting variables like task_io_accounting
2. a way to add proc entries under /proc/[pid] with readops printing current netio accounting variables.

Am I on the right path of implementing this? Thanks!

--
Amos Bird
amosbird at gmail.com

Please don't do this in /proc, that way lies madness. There is code in the android kernel tree that adds this type of process accounting to the kernel, you should look at that. It's been rejected by upstream for valid reasons, which you should be aware of, and is currently being rewritten to use ebpf, which might be the better solution for you in the long run.

And yes, you will have to modify the kernel to try to achieve this, but it's better to just go grab the android code if you want to see how this is done instead of trying to do it on your own from scratch.

hope this helps,

greg k-h