Messages in this thread | | | Date | Sun, 1 May 2005 00:58:29 +0100 | From | Jamie Lokier <> | Subject | Re: [PATCH] private mounts |
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Olivier Galibert wrote: > > > "mount --bind /proc/self/fd/N mount_point" works, try it. > > > > What do people think about that? > > To me it looks like an atrocious hack that works only because of the > way the implementation is done and not really by design.
From fs/namespace.c:do_loopback, the function which does bind mounts:
if (check_mnt(nd->mnt) && (!recurse || check_mnt(old_nd.mnt))) {
check_mnt() verifies that a mountpoint is in the same namespace as the current process. recurse is set for --rbind mounts, but not --bind mounts.
Notice how old_nd.mnt is explicitly _not_ checked for being in the current namespace when doing --bind?
That says to me that Al thought about this case, and coded for it...
(I'm still not clear why the check_mnt() calls are needed at all, though).
-- Jamie - 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/
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