Hello, 2016-01-22 10:21 GMT+01:00 Rami Rosen <roszenrami@gmail.com>:
I've found functions for global files, maybe they are the same). I'd like to check when these files where introduced (from what kernel version they are available)
Support for kernel network namesapces was added with kernel 2.6.29. It is basically based on adding an object called "net_ns" to the process descriptor, and instance of struct net, which represents a network namesapce. You can think of such object as representing the network state of a process, including all stats, sockets, devices, tables, and so on. This net_ns is a member of an object called nsproxy, which includes pointers to 4 other namesapces (uts, mnt, pid and ipc).
and there is no information about network namespaces at all (google, stackoverflow, man pages, kernel docs)
Thank You for your answer it gave me some clues so I was not completely blind when I checked kernel source code. Nevertheless, excuse me for not being precise enough, what I meant is that I couldn't find any docs about those 2 specific files: 1. /proc/[pid]/net/tcp 2. /proc/[pid]/net/tcp6 And how is their content related to net namespaces? I want to read connections for a process that is in a separate net namespace but I'd like to avoid switching to that namespace, my experiments showed that reading /proc/[pid]/net/tcp|tcp6 should be enough, but I'd like to find confirmation of that either in official docs (which I couldnt find) or in kernel source code (I failed there too). Again thank You in advance for your help. Regards, Darek