This has happened a fair while ago already.
** Changed in: util-linux (Ubuntu)
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/906293
Title:
Get rid of /etc/mtab and store userspace options in /run
Status in util-linux package in Ubuntu:
Fix Released
Bug description:
/etc/mtab has always been a bit of a wart, as it's potentially broken
to put information about mounted file system on a mountedfile system.
It is out of date in rescue mode when / is read-only (but "mount"
output won't tell you), and leads to bugs like bug 891688 or bug
13131.
The only reason why we still have it is that /proc/mounts is not able
to store userspace-only extra options which e. g. udisks
(uhelper=udisks), pm-utils (commit=XXX), or NFS use.
These days there is a better option for this. Copying response from
util-linux upstream Karel Zak:
"When linked with libmount (--enable-libmount-mount) then the
userspace options (and only the options) are maintained by library in
userspace in /run/mount/utab. The mount, umount and findmnt are able
to see these options from by libmount. It's also supported by the
latest mount.nfs (as NFS requires some userspace stuff too)..
See Fedora, we don't use mtab any more. (Well, some utils like df have
problem to de-duplicate list of mounted filesystems, but all
basic things works as expected.)"
This is worth investigating for the Q cycle.
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