Messages in this thread | | | Date | Sun, 27 Oct 2002 12:18:56 +0100 | From | Willy Tarreau <> | Subject | Re: rootfs exposure in /proc/mounts |
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Hi !
I remember this discussion too, and am also used to symlink mtab to /proc/mounts. But I also remember some people stating that /proc/mounts doesn't contain all information (some mount flags, nfs options ...) which may be needed for a mount -o remount, while mtab contains them.
I too agree that it's non-sense to have both mtab and /proc/mounts. If mounts isn't usable, why keep it ? At the moment, the only reason why I would abandon this symlink would be that mounts be removed from /proc entirely ! And I also agree that mtab shouldn't be under /etc (this is the only file that needs to be written to). At least, it should be moved to /var/state or something like that, provided it's available early in the boot stage, but this issue is not a kernel one anyway.
But at this time, I still think that a symlink to /proc/mounts is the safest solution in embedded or diskless situations, because even if we cannot update it for the very first mounts, at least it will be correct when /proc is mounted.
May be we should just accept this case as a common one, and update tools (mount, umount, df, ?) to be able to use both mtab and /proc/mounts, and simply ignore any rootfs entry.
Just my 0.02 euros. Willy
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