Messages in this thread | | | From | (Eric W. Biederman) | Subject | Re: [patch 05/10] add "permit user mounts in new namespace" clone flag | Date | Thu, 12 Apr 2007 22:45:33 -0600 |
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"Serge E. Hallyn" <serue@us.ibm.com> writes:
> Quoting Miklos Szeredi (miklos@szeredi.hu): >> From: Miklos Szeredi <mszeredi@suse.cz> >> >> If CLONE_NEWNS and CLONE_NEWNS_USERMNT are given to clone(2) or >> unshare(2), then allow user mounts within the new namespace. >> >> This is not flexible enough, because user mounts can't be enabled for >> the initial namespace. >> >> The remaining clone bits also getting dangerously few... >> >> Alternatives are: >> >> - prctl() flag >> - setting through the containers filesystem > > Sorry, I know I had mentioned it, but this is definately my least > favorite approach. > > Curious whether are any other suggestions/opinions from the containers > list?
Given the existence of shared subtrees allowing/denying this at the mount namespace level is silly and wrong.
If we need more than just the filesystem permission checks can we make it a mount flag settable with mount and remount that allows non-privileged users the ability to create mount points under it in directories they have full read/write access to.
I don't like the use of clone flags for this purpose but in this case the shared subtress are a much more fundamental reasons for not doing this at the namespace level.
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