[Ocfs2-tools-devel] [PATCH 27/39] o2cb: Introduce the cluster info struct.

[Sunil Mushran]

Joel Becker wrote:
> The filesystem now has a field on disk called ocfs2_cluster_info.  It
> contains the name of the cluster stack and the name of the cluster.  It
> is only valid if the USERSPACE_STACK incompat bit is set.  If the bit is
> not set, the filesystem expects the classic stack.
>
> libocfs2 gains a routine to read this field.  It fills in a struct
> o2cb_cluster_desc.  If the classic stack is in use, the structure is
> filled in with NULLs.
>
> Likewise, o2cb_*_group_*() take the o2cb_cluster_desc structure rather
> than a cluster name.  This allows them to check the stack expected by
> the filesystem with the stack actually in use.  If a userspace stack,
> the name will be passed over the wire to the control daemon.
>
> Signed-off-by: Joel Becker <joel.becker at oracle.com>
Signed-off-by: Sunil Mushran <sunil.mushran at oracle.com>