From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: [PATCH v2 09/12] raid5-ppl: read PPL signature from IMSM metadata Date: Wed, 07 Dec 2016 12:25:55 +1100 Message-ID: <871sxk4jj0.fsf@notabene.neil.brown.name> References: <20161205153113.7268-1-artur.paszkiewicz@intel.com> <20161205153113.7268-10-artur.paszkiewicz@intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Return-path: In-Reply-To: <20161205153113.7268-10-artur.paszkiewicz@intel.com> Sender: linux-raid-owner@vger.kernel.org To: Artur Paszkiewicz , shli@kernel.org Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --=-=-= Content-Type: text/plain On Tue, Dec 06 2016, Artur Paszkiewicz wrote: > The PPL signature is used to determine if the stored PPL is valid for a > given array. With IMSM, the PPL signature should match the > orig_family_num field of the superblock. To avoid passing this value > from userspace, it can be read from the IMSM MPB when initializing the > log. It is up to mdadm to determine if the PPL is valid. It would only tell the kernel that a PPL exists if it is valid... NeilBrown --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEG8Yp69OQ2HB7X0l6Oeye3VZigbkFAlhHZSMACgkQOeye3VZi gbmTjA/8CHrzKwrp3KeGwdFhD4nXocpTXdWFF6PYg5HaHCK53esCS3gMIdk9QpvX /X9HtG5hliubZGefAw1jSgHyqAKdbDApsS9XsfFDb2QROohywUvt/i8yQd7W4nGA mJ+SOhEkEEd07QGphoQHvrKTFJ/daa2oml6kqxX6Q1/Fg43kPljTEj0vIeudEfvB pRYSek+ZqHZS8R/s+nOSnbkZEU55g2ZiGq3A6/RJWIRoULXyqLcUC3hjvsX0FGKr NM4Ast4+vTbZLg/OKFH7BRuKCZhfu6y0Qb6Lr35kNs4agsjt56Qa7A/TGWC6hvuz gRg66SBCQevjl11VrLguFXUdS2j3IZyABXdcjyf1ZoAmqz/1qUi08xfVqql31HwN 7k4mOIgZvh39w9oJXqnOL522f+4m1EGL99KkPzYLcqahTldwX9xx0Vk2AT2FpD+k KQJ7bw2ByOZWp1ech4IkdAlpeyi7dNWvcqk2/nXViJrNAHYEv32xnH2D6njoUvHZ E/cWUgYQ0wfKCvHDPSjiUJvkKTP8RXH4/ItAXwCMxn74SJixeocOMP8hbvDJV4D3 ifyozzUZMlTKbuVTnkGsX8kRfLfDkohs7zWEaDwVs/8PqBrrTqt3C4ntkfK2oYZZ IMLcpfawSKlrLKrCPwXz0zFTF+dNN5HwOiJNMEG5/4YoVL18Vu4= =m8+g -----END PGP SIGNATURE----- --=-=-=--