On 22 Mar 2018, at 4:13, James Gritton wrote:

I've got a revision in the works <https://reviews.freebsd.org/D14791> to
remove the security.jail.foo_allowed sysctls:

The old jail system had sysctls to set jail permissions for all jails
(e.g. security.jail.mount_allowed), which were superseded by per-jail
permissions (e.g. allow.mount). These old sysctls remain a constant
source of confusion to users, who expect that setting the sysctl will
change the behavior of existing jails. That the sysctl value at the time a jail is created may matter is a backward-compatibility hack that does little or nothing to relieve the confusion. So it's time for them to go.

Also, jail(2) has been replaced by jail_set(2) for a number of years
now, and it really ought to retire - at least into the COMPAT world.

This may be of interest to anyone who works with jails. My hope is that no current software relies on these old sysctls, and they can be removed with little trouble. But removing old things never seems to go that easy.

I think #1 action item is to put them under BURN_BRIDGES or however it was spelt if you really want to remove them. Then for the next major version they could go away ( I’d be all up for removing them immediately (incl. from the man pages ) but I remember there used to be 2-3 ports which used the jail v1 stuff; might be worth checking that they were updated or are gone?


/bz
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