Albert Cahalan <albert@users.sf.net>, William Lee Irwin III <wli@holomorphy.com>, "Martin J. Bligh" <mbligh@aracnet.com>, Paul Jackson <pj@sgi.com> [ Cc: contributors to recent, related thread ] nproc is an attempt to address the current problems with /proc. In short, it exposes the same information via netlink (implemented for a small subset). This patch is experimental. I'm posting it to get the
linux-api@vger.kernel.org, Andrey Vagin <avagin@openvz.org>, Oleg Nesterov <oleg@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Cyrill Gorcunov <gorcunov@openvz.org>, Pavel Emelyanov <xemul@parallels.com>, Roger Luethi <rl@hellgate.ch>, Arnd Bergmann <arnd@arndb.de>, Arnaldo Carvalho de Melo <acme@kernel.org>, David Ahern <dsahern@gmail.com>, Andy Lutomirski <luto@amacapital.net>, Pavel O
Due to the complexity of developing and maintaining the kernel, only the most essential and performance-critical code are placed in the kernel. Other things, such as GUI, management and control code, typically are programmed as user-space applications. This practice of splitting the implementation of certain features between kernel and user space is quite common in Linux. Now the question is how c
26 July 2013 A project I have worked on lately required me to passively monitor the state of a large number of TCP sockets. There are different ways of achieving this. One can for example parse the content of /proc/net/tcp, or work some tcpdump/libpcap-magic to get close to real-time information. My only requirement was to collect a snapshot of the state of the sockets every X second, so using lib
詳しい話はまた後日ということで、とりあえず今回はソースと実行結果だけ貼り付けます。 netlinkの資料は比較的少ないので、カーネルソースを追いながら試行錯誤してみました。 TCPDIAG_GETSOCKでNLM_F_DUMPを指定するとソケットを列挙できるようです。 sportやdportを指定すると条件にマッチしたソケットだけ列挙してくれるので結構便利そう。 wbuf.req.id.idiag_sport=htons(3306);とかするとMySQLの接続数を調べることができたりなんかして。 ntest.c #include<stdio.h> #include<sys/socket.h> #include<linux/netlink.h> #include<linux/inet_diag.h> #include<net/tcp_states.h> int scount(int n) {
Network Working Group J. Salim Request for Comments: 3549 Znyx Networks Category: Informational H. Khosravi Intel A. Kleen Suse A. Kuznetsov INR/Swsoft July 2003 Linux Netlink as an IP Services Protocol Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyrig
I am moving my blog content to mdlayher.com. Please see the updated version of this content at: https://mdlayher.com/blog/linux-netlink-and-go-part-2-generic-netlink/ In Part 1 of this series, I described some of the fundamental concepts of netlink sockets, messages, and attributes. It is assumed that readers are already familiar with netlink from the previous post in this series. In this post, I
I am moving my blog content to mdlayher.com. Please see the updated version of this content at: https://mdlayher.com/blog/linux-netlink-and-go-part-1-netlink/ I’m a big fan of Prometheus. I use it quite a lot at both home and work, and greatly enjoy having insight into what my systems are doing at any given moment. One of the most widely used Prometheus exporters is the node_exporter: a daemon tha
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