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Date: Wed, 14 Feb 2007 19:13:21 -0800 From: Andreas Gruenbacher <agruen@...e.de> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Al Viro <viro@....linux.org.uk>, linux-fsdevel@...r.kernel.org, Tony Jones <tonyj@...e.de>, Neil Brown <neilb@...e.de>, Christoph Hellwig <hch@....de>, Greg Kroah-Hartman <gregkh@...e.de>, walt <wa1ter@...ealbox.com> Subject: Re: [PATCH] Fix d_path for lazy unmounts On Wednesday 14 February 2007 14:57, Andreas Gruenbacher wrote: > [1] Always make disconnected paths relative: > > From all these choices, I actually like [1] best, together with hiding > unreachable mount points in /proc/$pid/mounts and /proc/$pid/mountstats: > there is no real point in pretending that unreachable paths are reachable; > whichever process uses these paths is just as much in error when trying > from the pwd as when trying from the chroot. So here is how this could be implemented. See the lengthy explanations in the patch headers, too. d_path-lazy-unmounts.diff - Now fails sys_getcwd() with -ENOENT in case the path computed doesn't lead to the chroot. - No longer reports empty paths, but report '.' in that case instead. - Incorporates Neil's other minor feedback. no-unreachable-paths.diff Hide unreachable mount points in /proc/mounts and /proc/$PID/mountstats. In particular, this includes the rootfs mount for all processes that are not chroot()ed in that mount. Andreas View attachment "d_path-lazy-unmounts.diff" of type "text/x-diff" (8028 bytes) View attachment "no-unreachable-paths.diff" of type "text/x-diff" (5229 bytes)
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