svn commit: r232059 - in head: sys/fs/devfs sys/fs/nullfs sys/kern sys/sys usr.sbin/jail

Pawel Jakub Dawidek pjd at
Sat Feb 25 23:05:26 UTC 2012

On Thu, Feb 23, 2012 at 06:51:24PM +0000, Martin Matuska wrote:
> Author: mm
> Date: Thu Feb 23 18:51:24 2012
> New Revision: 232059
> URL:
> Log:
>   To improve control over the use of mount(8) inside a jail(8), introduce
>   a new jail parameter node with the following parameters:
>   allow.mount.devfs:
>   	allow mounting the devfs filesystem inside a jail
>   allow.mount.nullfs:
>   	allow mounting the nullfs filesystem inside a jail
>   Both parameters are disabled by default (equals the behavior before
>   devfs and nullfs in jails). Administrators have to explicitly allow
>   mounting devfs and nullfs for each jail. The value "-1" of the
>   devfs_ruleset parameter is removed in favor of the new allow setting.
>   Reviewed by:	jamie
>   Suggested by:	pjd
>   MFC after:	2 weeks

Thanks. Could you also add such an option for ZFS? It would also be nice
to document the fact that when file system is using VFCF_JAIL flag, it
should be added to allow.mount. Not sure where would be the best place
to document that, though. VFS_INIT(9) would be best, but eventhough it
is referenced by VFS(9), it doesn't exist...

Pawel Jakub Dawidek             
FreeBSD committer               
Am I Evil? Yes, I Am!           
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