Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754683AbcCaCTK (ORCPT ); Wed, 30 Mar 2016 22:19:10 -0400 Received: from mx2.suse.de ([195.135.220.15]:54894 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750704AbcCaCTI (ORCPT ); Wed, 30 Mar 2016 22:19:08 -0400 From: NeilBrown To: Gregory Farnum , Ilya Dryomov Date: Thu, 31 Mar 2016 13:18:59 +1100 Cc: "Yan\, Zheng" , Sage Weil , "linux-kernel\@vger.kernel.org" , Ceph Development Subject: Re: [GIT PULL] Ceph fixes for -rc7 In-Reply-To: References: <87fuvfw6g9.fsf@notabene.neil.brown.name> <874mbovmlv.fsf@notabene.neil.brown.name> <87poucu1rf.fsf@notabene.neil.brown.name> User-Agent: Notmuch/0.20.2 (http://notmuchmail.org) Emacs/24.5.1 (x86_64-suse-linux-gnu) Message-ID: <87wpojs830.fsf@notabene.neil.brown.name> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5402 Lines: 135 --=-=-= Content-Type: text/plain On Thu, Mar 31 2016, Gregory Farnum wrote: > On Wed, Mar 30, 2016 at 1:04 AM, Ilya Dryomov wrote: >> On Wed, Mar 30, 2016 at 4:40 AM, NeilBrown wrote: >>> On Wed, Mar 30 2016, Yan, Zheng wrote: >>> >>>> On Wed, Mar 30, 2016 at 8:24 AM, NeilBrown wrote: >>>>> On Fri, Mar 25 2016, Ilya Dryomov wrote: >>>>> >>>>>> On Fri, Mar 25, 2016 at 5:02 AM, NeilBrown wrote: >>>>>>> On Sun, Mar 06 2016, Sage Weil wrote: >>>>>>> >>>>>>>> Hi Linus, >>>>>>>> >>>>>>>> Please pull the following Ceph patch from >>>>>>>> >>>>>>>> git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git for-linus >>>>>>>> >>>>>>>> This is a final commit we missed to align the protocol compatibility with >>>>>>>> the feature bits. It decodes a few extra fields in two different messages >>>>>>>> and reports EIO when they are used (not yet supported). >>>>>>>> >>>>>>>> Thanks! >>>>>>>> sage >>>>>>>> >>>>>>>> >>>>>>>> ---------------------------------------------------------------- >>>>>>>> Yan, Zheng (1): >>>>>>>> ceph: initial CEPH_FEATURE_FS_FILE_LAYOUT_V2 support >>>>>>> >>>>>>> Just wondering, but was CEPH_FEATURE_FS_FILE_LAYOUT_V2 supposed to have >>>>>>> exactly the same value as CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING (and >>>>>>> CEPH_FEATURE_CRUSH_TUNABLES5)?? >>>>>> >>>>>> Yes, that was the point of getting it merged into -rc7. >>>>> >>>>> I did wonder if that might be the case. >>>>> >>>>>> >>>>>>> Because when I backported this patch (and many others) to some ancient >>>>>>> enterprise kernel, it caused mounts to fail. If it really is meant to >>>>>>> be the same value, then I must have some other backported issue to find >>>>>>> and fix. >>>>>> >>>>>> It has to be backported in concert with changes that add support for >>>>>> the other two bits. >>>>> >>>>> I have everything from fs/ceph and net/ceph as of 4.5, with adjustments >>>>> for different core code. >>>>> >>>>>> How did mount fail? >>>>> >>>>> "can't read superblock". >>>>> dmesg contains >>>>> >>>>> [ 50.822479] libceph: client144098 fsid 2b73bc29-3e78-490a-8fc6-21da1bf901ba >>>>> [ 50.823746] libceph: mon0 192.168.1.122:6789 session established >>>>> [ 51.635312] ceph: problem parsing mds trace -5 >>>>> [ 51.635317] ceph: mds parse_reply err -5 >>>>> [ 51.635318] ceph: mdsc_handle_reply got corrupt reply mds0(tid:1) >>>>> >>>>> then a hex dump of header:, front: footer: >>>>> >>>>> Maybe my MDS is causing the problem? It is based on v10.0.5 which >>>>> contains >>>>> >>>>> #define CEPH_FEATURE_CRUSH_TUNABLES5 (1ULL<<58) /* chooseleaf stable mode */ >>>>> // duplicated since it was introduced at the same time as CEPH_FEATURE_CRUSH_TUN >>>>> #define CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING (1ULL<<58) /* New, v7 encoding */ >>>>> >>>>> in ceph_features.h i.e. two features using bit 58, but not >>>>> FS_FILE_LAYOUT_V2 >>>>> >>>>> Should I expect Linux 4.5 to work with ceph 10.0.5 ?? >>>> >>>> Sorry, cephfs in linux 4.5 does not work with 10.0.5. Please upgrade >>>> to ceph 10.1.0 >>>> >>> >>> Ahhh.. I do wonder at the point of feature flags if they don't let you >>> run any client with any server... >>> Is there a compatability matrix published somewhere? >>> If I have to stay with 10.0.5 (I don't know yet), it is safe to use >>> Linux-4.4 code? >> >> 10.0.* are all development cuts, we didn't even built packages for >> some of them. 10.1.0 is the first release candidate. You can think of >> 10.0.5 as a random pre-rc1 kernel snapshot, aimed at brave testers, so >> you do want to upgrade. >> >> The reason it doesn't work is those three features are all defined to >> the same value, but two of them got added earlier in the 10.0.* cycle. >> CEPH_FEATURE_FS_FILE_LAYOUT_V2 came in last, after 10.0.5. > > A little more specifically: these feature bits do let you run any > client with any "real release" of Ceph that we expect not-testers to > be using. They *usually* work on our dev releases as well, but we've > gotten stingier about it as we come close to running out of feature > bits and are trying to pack more of them into the same actual bits > (we're working on freeing them up as well, but got started a little > later than is comfortable), while coordinating code merges between a > few different places. You got unlucky here. > -Greg Thanks - you've been most helpful. I'll see if we can use 10.1.0 for the MDS etc. Thanks, NeilBrown --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJW/IkTAAoJEDnsnt1WYoG5w/QP/3XDIdskKQf5MrZ8KmFUXJgE p/eiU47EZQbghU8KOVG0tGTGSjWhNWEt5B0fguGV08eCad/+BN51fGjAHluqIfeI 6XcdV/uKexOWgdUtEEok7LUczFuaHtSL0YwZdf6ixUANpRnFSWP8dhGdg9PBdRKY 8mWY20Zg2mZLTv18qgkVjYK1W6zsm+v/B2u/cI/7fZBzs2upWkFO7Xyb9obnDPI/ De3pf3Mf6YctMq4wYjcHaUC8YUwjL8pTdU8y3hALZZLVyAtS6GRDmf71G4weAFko 9mELZDCueLt6SFqmtVWuKg1PzYia8A2JZuwjwn/JvyouztkZs/vbMAut7g122Qsc +6PAMUIPk4TspWwijcW4k0zph3S8oX/coR/xEq2yUuOSBNdlRJLYpbDVAxaRRusU BIvhCjUSL8tptUQaBLAy2SHx4koUDLivL7Os9KTa0grRcu86iBGoLPmpdle+hmQ3 faY3vV7y9GvDY6rrCKYkFABM/46XLV8rDv/iMaNEqrgMGojP/glNUBZjGFOxNBca 48hjVFvEIgg826TLgXrYLTbTBlbXSEuL0yJhQTp544RLsC1jhFvuspA2iH+c+c4N nEImwgJ2wS/CMQLT9/M4UL0aixtffiOvPHDQQBf+W49jGwEUCopBX7W4A/i9YUAX eKplilAQcvs1dg7siik6 =84Gh -----END PGP SIGNATURE----- --=-=-=--