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bh=N9TKpgmGkiiAAbw2JALujkOukYurv4UBkg8ahf24A44=; b=aIUqKtqC4D0Oq1+mOSLjUfoQ9ckAd0rmRU4QjYJoJctuEy2IIQuOp4o74+SEzDp7Be7bLy TotAXj5t+fE+hDLZa2zec+IKaCvX2leFK6ElR8k+9JlROM3gu/EU/F/VSgyJLy0bTaYfCa Uuj2GeF3Xiv/PNHsVIwqrBNGqh+K3Vc= X-MC-Unique: HR80G1wKNaiM4Xk_L7O55Q-1 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, stefanha@redhat.com, mreitz@redhat.com, misono.tomohiro@jp.fujitsu.com Subject: [PULL 07/16] tools/virtiofsd: xattr name mapping examples Date: Mon, 26 Oct 2020 18:43:22 +0000 Message-Id: <20201026184331.272953-8-dgilbert@redhat.com> In-Reply-To: <20201026184331.272953-1-dgilbert@redhat.com> References: <20201026184331.272953-1-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 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: "Dr. David Alan Gilbert" Add a few examples of xattrmaps to the documentation. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Stefan Hajnoczi Message-Id: <20201023165812.36028-5-dgilbert@redhat.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Dr. David Alan Gilbert --- docs/tools/virtiofsd.rst | 50 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/docs/tools/virtiofsd.rst b/docs/tools/virtiofsd.rst index 67c16f9df0..d80c078d80 100644 --- a/docs/tools/virtiofsd.rst +++ b/docs/tools/virtiofsd.rst @@ -219,6 +219,56 @@ e.g.: =20 would hide 'security.' xattr's in listxattr from the server. =20 +xattr-mapping Examples +---------------------- + +1) Prefix all attributes with 'user.virtiofs.' + +:: + +-o xattrmap=3D":prefix:all::user.virtiofs.::bad:all:::" + + +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 + +:: + + "/prefix/all/trusted./user.virtiofs./ + /bad/server//trusted./ + /bad/client/user.virtiofs.// + /ok/all///" + + +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.' and +stripping of 'user.virtiofs.'. +The second rule hides unprefixed 'trusted.' attributes +on the host. +The third rule stops a guest from explicitly setting +the 'user.virtiofs.' path directly. +Finally, the fourth rule lets all remaining attributes +through. + +3) Hide 'security.' attributes, and allow everything else + +:: + + "/bad/all/security./security./ + /ok/all///' + +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 -------- =20 --=20 2.28.0