From: "hch@infradead.org" <hch@infradead.org>
To: Trond Myklebust <trondmy@hammerspace.com>
Cc: "bfields@fieldses.org" <bfields@fieldses.org>,
"hch@infradead.org" <hch@infradead.org>,
"wangzhibei1999@gmail.com" <wangzhibei1999@gmail.com>,
"security@kernel.org" <security@kernel.org>,
"w@1wt.eu" <w@1wt.eu>, "greg@kroah.com" <greg@kroah.com>,
"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
"pgoetz@math.utexas.edu" <pgoetz@math.utexas.edu>,
"chuck.lever@oracle.com" <chuck.lever@oracle.com>
Subject: Re: nfsd vurlerability submit
Date: Wed, 13 Jan 2021 14:40:26 +0000 [thread overview]
Message-ID: <20210113144026.GA1517953@infradead.org> (raw)
In-Reply-To: <0da3d3f1fee1a70eab3f78212f9282b03e21fc4d.camel@hammerspace.com>
On Wed, Jan 13, 2021 at 02:34:45PM +0000, Trond Myklebust wrote:
> On Wed, 2021-01-13 at 08:12 +0000, Christoph Hellwig wrote:
> > FYI, if people really want to use some sort of subtree exports, for
> > XFS
> > (and probably ext4) we encode the project id into the file handle and
> > use the hierarchical project ID inheritance that we already use for
> > project quotas.
>
> You'd basically need something along the lines of a NetApp qtree.
>
> i.e. a persisted tag that can label all the files and directories in a
> subtree, and that is used to enforce a set of rules that are generally
> normally associated with filesystems. So no renames from objects inside
> the subtree to directories that lie outside it. No hard links that
> cross the subtree boundary.
That is the XFS project ID, which ext4 has also picked up a few years
ago.
next prev parent reply other threads:[~2021-01-13 14:43 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAHxDmpTKJfnhGY9CVupyVYhNCTDVKBB6KRwh-E6u_XEPJq4WJQ@mail.gmail.com>
[not found] ` <20210105165633.GC14893@fieldses.org>
[not found] ` <X/hEB8awvGyMKi6x@kroah.com>
[not found] ` <20210108152017.GA4183@fieldses.org>
[not found] ` <CAHxDmpSp1LHzKD5uqbfi+jcnb+nFaAZbc5++E0oOvLsYvyYDpw@mail.gmail.com>
[not found] ` <20210108164433.GB8699@fieldses.org>
[not found] ` <CAHxDmpSjwrcr_fqLJa5=Zo=xmbt2Eo9dcy6TQuoU8+F3yVVNhw@mail.gmail.com>
[not found] ` <20210110201740.GA8789@fieldses.org>
[not found] ` <20210110202815.GB8789@fieldses.org>
[not found] ` <CAHxDmpR8S7NR8OU2nWJmWBdFU9a7wDuDnxviQ2E9RDOeW9fExg@mail.gmail.com>
2021-01-11 19:25 ` nfsd vurlerability submit J. Bruce Fields
2021-01-11 21:01 ` [PATCH] nfsd4: readdirplus shouldn't return parent of export J. Bruce Fields
2021-01-12 13:31 ` Chuck Lever
2021-01-12 13:50 ` Bruce Fields
[not found] ` <20210108152607.GA950@1wt.eu>
[not found] ` <20210108153237.GB4183@fieldses.org>
[not found] ` <20210108154230.GB950@1wt.eu>
[not found] ` <20210111193655.GC2600@fieldses.org>
[not found] ` <CAHxDmpR1zG25ADfK2jat4VKGbAOCg6YM_0WA+a_jQE82hbnMjA@mail.gmail.com>
[not found] ` <CAHxDmpRfmVukMR_yF4coioiuzrsp72zBraHWZ8gaMydUuLwKFg@mail.gmail.com>
2021-01-12 15:32 ` nfsd vurlerability submit J. Bruce Fields
2021-01-12 16:53 ` Trond Myklebust
2021-01-12 17:20 ` Patrick Goetz
2021-01-12 18:03 ` bfields
2021-01-13 8:12 ` Christoph Hellwig
2021-01-13 14:34 ` Trond Myklebust
2021-01-13 14:40 ` hch [this message]
2021-01-13 15:16 ` Trond Myklebust
2021-01-13 15:30 ` hch
2021-01-13 15:45 ` Frank Filz
2021-01-21 20:01 ` Patrick Goetz
2021-01-21 22:04 ` bfields
2021-01-21 23:19 ` Patrick Goetz
2021-01-22 1:30 ` bfields
2021-01-22 13:20 ` Patrick Goetz
2021-01-22 14:48 ` Tom Talpey
[not found] ` <CAHxDmpTEBJ1jd_fr3GJ4k7KgzaBpe1LwKgyZn0AJ0D1ESK12fQ@mail.gmail.com>
2021-01-12 17:47 ` Trond Myklebust
[not found] ` <CAHxDmpTyrG74hOkzmDK834t+JiQduWHVWxCf_7nrDVa++EK2mA@mail.gmail.com>
2021-01-13 14:25 ` Trond Myklebust
2021-01-14 18:07 ` bfields
2021-01-14 18:29 ` Linus Torvalds
2021-01-14 18:35 ` Chuck Lever
2021-01-14 18:37 ` Linus Torvalds
2021-01-18 16:29 ` 吴异
2021-01-18 22:55 ` bfields
2021-01-19 2:48 ` 吴异
2021-01-19 3:46 ` bfields
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