mount_nullfs inside a jail

[Boris Samorodov]

On Wed, 25 Jul 2007 16:50:31 +0200 Pawel Jakub Dawidek wrote:
> On Wed, Jul 25, 2007 at 06:46:22PM +0400, Boris Samorodov wrote:
> > On Tue, 24 Jul 2007 16:45:49 +0200 Pawel Jakub Dawidek wrote:
> > > On Tue, Jul 24, 2007 at 06:03:47PM +0400, Boris Samorodov wrote:
> > > > On Mon, 23 Jul 2007 15:33:33 +0200 Pawel Jakub Dawidek wrote:
> > 
> > > > > As you can see, nullfs doesn't have 'jail' flag. The only jail-friendly
> > > > > file system currently is ZFS. Nullfs is a good candidate for a
> > > > > jail-friendly file system, but is not marked as such yet.
> > > > 
> > > > Does somebody know if only a flag is missing or not?
> > 
> > > You may try changing the line in /sys/fs/nullfs/null_vfsops.c from:
> > 
> > > VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK);
> > 
> > > to:
> > 
> > > VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK | VFCF_JAIL);
> > 
> > This didn't help:
> > -----
> > btest# sysctl security.jail
> > security.jail.jailed: 1
> > security.jail.mount_allowed: 1
> > security.jail.chflags_allowed: 1
> > security.jail.allow_raw_sockets: 0
> > security.jail.enforce_statfs: 2
> > security.jail.sysvipc_allowed: 1
> > security.jail.socket_unixiproute_only: 1
> > security.jail.set_hostname_allowed: 1
> > btest# lsvfs
> > Filesystem                        Refs Flags
> > -------------------------------- ----- ---------------
> > ufs                                  6 
> > nfs                                  0 network
> > procfs                               0 synthetic
> > devfs                                3 synthetic
> > ntfs                                 0 
> > msdosfs                              0 
> > nfs4                                 0 network
> > nullfs                               1 loopback, jail
> > cd9660                               0 read-only
> > btest# df
> > Filesystem  1K-blocks     Used     Avail Capacity  Mounted on
> > /dev/da0s1d 945804208 22136782 848003090     3%    /
> > btest# mount /usr/ports/distfiles /mnt
> > mount: /usr/ports/distfiles : Operation not permitted

> mount_nullfs?

Ops!!! (i need some coffee)  My bad... Mounting works good but:
-----
btest# umount /mnt
umount: unmount of [restricted] failed: Invalid argument
-----


WBR
-- 
Boris Samorodov (bsam)
Research Engineer, http://www.ipt.ru Telephone & Internet SP
FreeBSD committer, http://www.FreeBSD.org The Power To Serve