Date: Fri, 05 Dec 2008 10:22:34 -0800 From: Julian Elischer <julian@elischer.org> To: James Gritton <jamie@gritton.org> Cc: svn-src-head@freebsd.org, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, svn-src-all@freebsd.org, src-committers@freebsd.org, =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no> Subject: Re: svn commit: r185435 - in head: lib/libc/sys lib/libkvm share/man/man4 sys/compat/freebsd32 sys/kern sys/net sys/netinet sys/netinet6 sys/security/mac_bsdextended sys/sys usr.bin/cpuset usr.sbin/jai... Message-ID: <4939716A.3080103@elischer.org> In-Reply-To: <4939482F.4040404@gritton.org> References: <200811291432.mATEWE2a053742@svn.freebsd.org> <86skp3yje2.fsf@ds4.des.no> <20081204184332.C80401@maildrop.int.zabbadoz.net> <4939482F.4040404@gritton.org>
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James Gritton wrote: > Bjoern A. Zeeb wrote: >> On Thu, 4 Dec 2008, Dag-Erling Smørgrav wrote: >>> "Bjoern A. Zeeb" <bz@FreeBSD.org> writes: >>>> Jails can have an unrestricted (no duplicate protection, etc.) name >>>> in addition to the hostname. The jail name cannot be changed from >>>> within a jail and is considered to be used for management purposes >>>> or as audit-token in the future. >>> >>> Is there a specific reason why we allow duplicates? >> >> Yes, so that people have a choice. >> >> You would have to take into account "DYING" jails with possibly >> duplicate names anyway. >> >> And it's a purely administrative name (cannot be changed from within >> the jail) so it's up to the administrator to have 2 "Customer Webserver" >> jails or a "Customer Webserver Tin" and a "Customer Webserver Box". >> >> BTW. in case people wonder how to set it (atm.) from rc.conf, you >> can use jail_<name>_flags. > > My new (upcoming) jail framework patches also support names, but without > allowing duplicates. This is necessary because jails can be looked up > in the kernel by name as well as by ID. I handle the special case of > "dying" jails, allowing a new jail to duplicate the name of one on the > the way out. > > As far as people having a choice, I don't see any more reason to offer > the choice of duplicate jail names than I do in offering duplicate login > names. It just doesn't make sense in the context of what purpose I > expect a name to serve. hierarchical names make this even less sensible, > > - Jamie
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