Ilya, If we map with 'nocrc' would that help ? Thanks & Regards Somnath -----Original Message----- From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Ilya Dryomov Sent: Saturday, December 12, 2015 3:12 AM To: Varada Kari Cc: ceph-devel@xxxxxxxxxxxxxxx Subject: Re: Rbd map failure in 3.16.0-55 On Sat, Dec 12, 2015 at 7:56 AM, Varada Kari <Varada.Kari@xxxxxxxxxxx> wrote: > Hi all, > > We are working on jewel branch on a test cluster to validate some of the fixes. But landed up in the following error when mapping an image using krbd on Ubuntu 14.04.2 with 3.16.0-55 kernel version. > > $ sudo rbd map -p pool1 rbd1 > rbd: sysfs write failed > rbd: map failed: (5) Input/output error > > > $ uname -a > Linux 3.16.0-55-generic #74~14.04.1-Ubuntu SMP Tue Nov 17 10:15:59 UTC > 2015 x86_64 x86_64 x86_64 GNU/Linux > > $dmesg > .... > [11082.199006] libceph: read_partial_message bad hdr crc 2112154322 > != expected 0 [11082.209414] libceph: mon0 x.x.x.x:6789 socket error > on read [11092.238317] libceph: read_partial_message bad hdr crc > 2112154322 != expected 0 [11092.248982] libceph: mon0 x.x.x.x:6789 > socket error on read ..... > > When I looked at the ceph_msg_header on 3.16 kernel > (http://lxr.free-electrons.com/source/include/linux/ceph/msgr.h?v=3.16 > ) > > There is one field change from jewel branch > > 145 struct ceph_msg_header { > ....... > 159 > 160 /* oldest code we think can decode this. unknown if zero. */ > 161 __le16 compat_version; <<< New one, which is present from 3.19 onwards > 162 __le16 reserved; > 163 __le32 crc; /* header crc32c */ > 164 } __attribute__ ((packed)); That's not a problem - those 16 bits used to be reserved. > > How can map the image in 3.16 kernel apart from upgrading the kernel? Do we have any branch where I can build the modules with latest changes? I'm guessing you have ms_crc_header set to false - the kernel client always checks header (and middle) checksums, hence the mismatch. Thanks, Ilya -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
