Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935448Ab0HFIFQ (ORCPT ); Fri, 6 Aug 2010 04:05:16 -0400 Received: from mtagate5.de.ibm.com ([195.212.17.165]:45106 "EHLO mtagate5.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933696Ab0HFIFK (ORCPT ); Fri, 6 Aug 2010 04:05:10 -0400 Message-ID: <4C5BC232.1030304@free.fr> Date: Fri, 06 Aug 2010 10:05:06 +0200 From: Daniel Lezcano User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 MIME-Version: 1.0 To: Kay Sievers CC: Chris Friesen , Linux Kernel Mailing List Subject: Re: mount notification question References: <4C5734A2.7070400@free.fr> <4C59B444.7080609@nortel.com> <4C5B6065.7000700@free.fr> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1851 Lines: 43 On 08/06/2010 09:44 AM, Kay Sievers wrote: > On Fri, Aug 6, 2010 at 03:07, Daniel Lezcano wrote: > >> On 08/04/2010 08:41 PM, Chris Friesen wrote: >> >>> On 08/02/2010 03:12 PM, Daniel Lezcano wrote: >>> >>>> is there a way to be notified when a mount occurs on the system ? >>>> >>> Have you looked on google? The link is a bit misleading but they do >>> give a way to do it (not using inotify). >>> >>> http://stackoverflow.com/questions/1113176/how-could-i-detect-when-a-directory-is-mounted-with-inotify >>> >> Thanks a lot for the pointer. I am not sure this solution will work, because >> it is inadequate for watching a specific location in a container context >> separated by the mount and the network namespaces. We have multiple mount >> points at the same place (eg. the mount point inheritance, the container >> configuration and the init scripts may mount /dev or /var/run several time) >> and the network namespace separation will make impossible to watch udev >> event via a netlink socket. I didn't look at the inotify implementation but >> IMHO, it should be worth to add IN_MOUNT and IN_UNMOUNT events for inotify >> no ? >> > These events wouldn't work, and they are long removed from the kernel > and don't exist. > > You need to poll() /proc/mounts, and any changes in it will wake you > up with POLL_ERR. /proc/mounts should be namespace aware. > Ah, great ! I will look for this solution (I suppose I will probably have to diff /proc/mounts but anyway ...) Thanks Kay and Chris for your help. -- Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/