Hello.

The attached patch against reiser4progs-1.1.0 allows to print
node plugin without any tricky manipulations:

# debugfs.reiser4 -f /dev/xxx

[...]
Format super block (17):
format:        format40
version:    1
magic:        ReIsEr40FoRmAt
mkfs id:    0x10eca54c
flushes:    0
blocks:        128000
free blocks:    127970
root block:    23
node plugin:    0x1 (node41)
tail policy:    0x2 (smart)
next oid:    0x10000
file count:    1
tree height:    2
key policy:    LARGE
[...]

Thanks,
Edward.

On 01/05/2016 10:45 PM, Edward Shishkin wrote:
>
>
> On 01/05/2016 02:18 PM, Georgios Tsalikis wrote:
>> Or at least so it seems. Once i used node=node41 for checksums but 
>> the system showed node40.
>
>
> Who exactly reports "node40"?
>
>
>> Now i did an fsck with override node=node41 trying to add the feature 
>> in a partition with node40. It reports node40 afterwards. Any clues?
>
>
> You can specify node=node41 only when formatting a partition.
> Different node formats in the same reiser4 volume are not supported.
> Conversion of node formats are not implemented. To check the actual
> node format, dump the tree with "debugfs.reiser4 -f -t /dev/xxx" and
> grep for "NODE". If your nodes are managed by node41 plugin, then
> you'll see the field "CSUM=xxxxx".
>
> Thanks,
> Edward.