From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org (Eric W. Biederman) Subject: Re: [PATCH 00/11] pkg-shadow support subordinate ids with user namespaces Date: Fri, 22 Feb 2013 08:34:32 -0800 Message-ID: <87zjyw489z.fsf@xmission.com> References: <87d2wxshu0.fsf@xmission.com> <51276189.5040803@parallels.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <51276189.5040803-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org> (Glauber Costa's message of "Fri, 22 Feb 2013 16:16:09 +0400") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Glauber Costa Cc: Linux Containers , Pkg-shadow-devel-XbBxUvOt3X2LieD7tvxI8l/i77bcL1HB@public.gmane.org, "Michael Kerrisk (man-pages)" , Nicolas =?utf-8?Q?Fran=C3=A7ois?= List-Id: containers.vger.kernel.org Glauber Costa writes: > On 01/22/2013 01:11 PM, Eric W. Biederman wrote: >> >> The kernel support for user namespaces allows ordinary users to use >> multiple uids and gids if they can get a trusted program to tell the >> kernel the set of subordinate uids and gids they are allowed to use. >> >> This is my work to make that trusted program. >> Two new files are added /etc/subuid /etc/subgid that specify >> ranges of uids and gids that users may uses. >> >> useradd, and newusers are modifed to add users to those files. >> >> userdel is modeifed to remove users from those files. >> >> usermod is modified to give manual control of what goes in those files. >> >> newuidmap and newgidmap read the new files and update >> /proc/[pid]/uid_map and /proc/[pid]/gid_map respectively >> as requested by their command line parameters and as allowed >> by the /etc/subuid and /etc/subgid. >> >> The following patches are against the current developent trunk >> of pkg-shadow svn rev 3745. With minor tweaking of man/Makefile.am >> these patches also apply to shadow 4.1.5. >> >> Eric W. Biederman (11): >> Documentation for /etc/subuid and /etc/subgid >> login.defs.5: Document the new variables in login.defs >> Implement commonio_append. >> Add backend support for suboridnate uids and gids >> Implement find_new_sub_uids find_new_sub_gids >> userdel: Add support for removing subordinate user and group ids. >> useradd: Add support for subordinate user identifiers >> Add support for detecting busy subordinate user ids >> usermod: Add support for subordinate uids and gids. >> newusers: Add support for assiging subordinate uids and gids. >> newuidmap,newgidmap: New suid helpers for using subordinate uids and gids > > Hi, > > Is there any intention to merge this (or any later version thereof) ? > I intend to start excluding uid ranges for containers usage in OpenVZ, > and support for that in tooling would come in handy. I don't know what the state of the main pkg-shadow package is. I have heard anything and the repository seems to have been dormant since the last release almost a year ago. However the last I heard Serge was working on getting these changes into Ubuntu. So the intention is to get this code merged but I don't know what more needs to be done at this point. Eric