Tag Archives: CentOS

Linux kernel hacking – one relay file for all CPUs

Posted on November 16, 2015 by daveti

I wrote a post about kernel relay 2 years go (https://davejingtian.org/2013/06/29/relay-linux-kernel-relay-filesystem/). However, I have realized that I did not understand relay until recently when I was debugging a relay-related bug. Though I was working on RHEL 2.6.32 kernel, this post … Continue reading →

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Linux kernel hacking – support SO_PEERCRED for local TCP socket connections

Posted on October 6, 2015 by daveti

In my old post (https://davejingtian.org/2015/02/17/retrieve-pid-from-the-packet-in-unix-domain-socket-a-complete-use-case-for-recvmsgsendmsg/), we talked about how to retrieve the peer PID from Unix domain socket using struct ucred. A more smart way to do this is using getsockopt() syscall with option SO_PEERCRED directly. As you expected (or … Continue reading →

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Linux Kernel DSA and Provenance Release

Posted on August 21, 2015 by daveti

Linux Provenance kernel (2.6.32) and tools for CentOS and RedHat Enterprise Linux https://github.com/daveti/prov-kernel https://github.com/daveti/prov-tools Linux kernel crypto – DSA https://github.com/daveti/kdsa During the development on kernel 2.6.32, we found a bug in mpi-pow.c which failed DSA.  The patch file has been included … Continue reading →

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crypto – use Linux kernel crypto API

Posted on June 18, 2014 by daveti

Crypto is an important part of the Linux kernel source code. One can tell from the standalone crypto directory under the kernel source tree. Device drivers, file system and security all need crypto. This post does not help understand the … Continue reading →

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