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[dm-devel] Linux 2.6.19.1 device mapper error



On further debugging, we found that if we are using a kernel version
2.6.16, the device mapper was functioning correctly as expected. The
device mapper version in 2.6.16 is 4.5.0-ioctl and the device mapper
version in  2.6.19.1 kernel is 4.11.0-ioctl.

Is there a difference between the 4.5.0 version and 4.11.0 version
that could be causing the problem that we are facing? Is there a list
of changes that has gone into device-mapper between these two
versions?

Thanks in advance for your inputs,

Srini

On 2/8/07, Srini <v vvsrini gmail com> wrote:
Hi all,

I am currently trying to create a snapshot through EVMS (v2.5.4) and I am getting an error from the device mapper module in the kernel version 2.6.19.1 (dmesg). The following is the error message:

device-mapper: table: 253:2: snapshot-origin: unknown target type
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:7: snapshot: requires exactly 4 arguments
device-mapper: ioctl: error adding target to table
device-mapper: table: 253:7: snapshot: requires exactly 4 arguments
device-mapper: ioctl: error adding target to table

The lsmod command on the same machine shows the dm-snapshat module to have been successfully inserted:

-bash-3.00# lsmod
Module                  Size  Used by    Not tainted
dm_snapshot 17192 1 - Live 0xf8948000
dm_mod 51736 14 dm_snapshot, Live 0xf8906000
nfsd 216944 0 - Live 0xf89c4000
exportfs 5632 1 nfsd, Live 0xf88cf000

The device mapper version itself (as printed in dmesg) is as follows:

device-mapper: ioctl: 4.10.0-ioctl (2006-09-14) initialised:    dm-devel redhat com

Since the device mapper is returning an error, the EVMS Snapshot plugin is returning an invalid argument (EINVAL) and exiting.

Any help would be much highly appreciated since we have been facing this issue for a week now...

Thanks in advance for all  your inputs,

srini


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