sri <toyours_sridhar <at> yahoo.co.in> writes:
>
> Hi,
>
> I Would like to know between 2 snapshots of a subvolume, can we identify
> what all blocks modified particular to that subvolume ?
>
> there can be many subvolume and snapshots present on the btrfs but i want
> only blocks modified since first snapshot for the specific subvolume.
>
> blocks should include metadata and data blocks.
Not directly diff blocks, rather files, you could do something like this:
btrfs subvolume find-new <newer_snapshot> `btrfs subvolume show
<older_snapshot> | grep Generation | awk '{print $2}'` | awk '{ print $17 }'
| sort | uniq
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