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Thu, 27 Aug 2020 15:37:27 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-114-163.ams2.redhat.com [10.36.114.163]) by smtp.corp.redhat.com (Postfix) with ESMTP id 913FF5D9E8; Thu, 27 Aug 2020 15:37:26 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, vgoyal@redhat.com, stefanha@redhat.com, virtio-fs@redhat.com Subject: [PATCH v2 6/6] tools/virtiofsd: xattr name mapping examples Date: Thu, 27 Aug 2020 16:36:57 +0100 Message-Id: <20200827153657.111098-7-dgilbert@redhat.com> In-Reply-To: <20200827153657.111098-1-dgilbert@redhat.com> References: <20200827153657.111098-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0.0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=dgilbert@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/27 02:56:52 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.959, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Dr. David Alan Gilbert" Add a few examples of xattrmaps to the documentation. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Ján Tomko --- docs/tools/virtiofsd.rst | 49 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/docs/tools/virtiofsd.rst b/docs/tools/virtiofsd.rst index 2efa16d3c5..a138549862 100644 --- a/docs/tools/virtiofsd.rst +++ b/docs/tools/virtiofsd.rst @@ -161,6 +161,55 @@ in which case a 'server' rule will always match on all names from the server. +xattr-mapping Examples +---------------------- + +1) Prefix all attributes with 'user.virtiofs.' + +:: + +-o xattrmap=":all:prefix::user.virtiofs.::all:bad:::" + + +This uses two rules, using : as the field separator; +the first rule prefixes and strips 'user.virtiofs.', +the second rule hides any non-prefixed attributes that +the host set. + +2) Prefix 'trusted.' attributes, allow others through + +:: + + "/all/prefix/trusted./user.virtiofs./ + /server/bad//trusted./ + /client/bad/user.virtiofs.trusted.// + /all/ok///" + + +Here there are four rules, using / as the field +separator, and also demonstrating that new lines can +be included between rules. +The first rule is the prefixing of 'trusted.'. +The second rule hides unprefixed 'trusted.' attributes +on the host. +The third rule stops a guest from explicitily setting +the 'user.viritofs.trusted.' path directly. +Finally, the fourth rule lets all remaining attributes +through. + +3) Hide 'security.' attributes, and allow everything else + +:: + + "/all/bad/security./security./ + /all/ok///' + +The first rule combines what could be separate client and server +rules into a single 'all' rule, matching 'security.' in either +client arguments or lists returned from the host. This stops +the client seeing any 'security.' attributes on the server and +stops it setting any. + Examples --------