Date: Wed, 25 Jun 2003 16:48:49 +0200 From: Pawel Jakub Dawidek <nick@garage.freebsd.pl> To: Dmitry Sivachenko <mitya@cavia.pp.ru> Cc: freebsd-arch@freebsd.org Subject: Re: Jailed sysvipc implementation. Message-ID: <20030625144849.GJ7587@garage.freebsd.pl> In-Reply-To: <20030625140518.GA23435@fling-wing.demos.su> References: <20030624164602.GW7587@garage.freebsd.pl> <20030625135106.GA19868@fling-wing.demos.su> <20030625140518.GA23435@fling-wing.demos.su>
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--OPsOAWNf+lTlQ18+ Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jun 25, 2003 at 06:05:18PM +0400, Dmitry Sivachenko wrote: +> > > Some time ago I've implemented private memory zones for IPC mechism. +> > > Every jail and main host got its own memory for IPC operations. +> > > It was implemented for FreeBSD 4.x. Avaliable at: +> > >=20 +> > > http://garage.freebsd.pl/privipc.tbz +> > > http://garage.freebsd.pl/privipc.README +> >=20 +> > I think it would be better to add checks to disallow the use of IPC=20 +> > primitives created in one jail from another. +> > Thus we will avoid allocating separate segments of kernel memory for +> > each jail. +> >=20 +> > It could be trivially achieved by adding another field to struct ipc_p= erm, +> > but Robert Watson said he knows another way of doing this without +> > breaking ABI (if I understood him right). +> >=20 +>=20 +> Please look at his patch: +>=20 +> http://www.watson.org/~robert/freebsd/mac_sysvipc.diff +>=20 +> It does slightly different things, but we could borrow from it. But you got still *one* memory zones for every jail and main host. And I want to separate them. --=20 Pawel Jakub Dawidek pawel@dawidek.net UNIX Systems Programmer/Administrator http://garage.freebsd.pl Am I Evil? Yes, I Am! http://cerber.sourceforge.net --OPsOAWNf+lTlQ18+ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (FreeBSD) iQCVAwUBPvm2UT/PhmMH/Mf1AQEVNgP/X3aFLNbD24xBPxS1ln2c0jx5Y2+/JvWc f3wuPN+nsBIL1BrvVdiTcT3WciOT9shRwfniLxe1c+biMbL7LIq+uAw1QyCPG93y YQjKrTa7MkDahnn4NLRUyKxw7GgpXJ2dbEE+jQf93jlUFTkjzweVJ6d9YhnZMEa+ qpDnLDfxYcU= =51Jk -----END PGP SIGNATURE----- --OPsOAWNf+lTlQ18+--
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