ocfs2: Add the 'cluster_stack' sysfs file.

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Userspace can now query and specify the cluster stack in use via the
/sys/fs/ocfs2/cluster_stack file.  By default, it is 'o2cb', which is
the classic stack.  Thus, old tools that do not know how to modify this
file will work just fine.  The stack cannot be modified if there is a
live filesystem.

ocfs2_cluster_connect() now takes the expected cluster stack as an
argument.  This way, the filesystem and the stack glue ensure they are
speaking to the same backend.

If the stack is 'o2cb', the o2cb stack plugin is used.  For any other
value, the fsdlm stack plugin is selected.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

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This commit is contained in:

Joel Becker 2008-02-01 15:17:30 -08:00 • committed by Mark Fasheh

parent b61817e116

commit 9c6c877c04

3 changed files with 104 additions and 13 deletions

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3

fs/ocfs2/dlmglue.c

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111

fs/ocfs2/stackglue.c

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3

fs/ocfs2/stackglue.h

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