ocfs2: Add the USERSPACE_STACK incompat bit.

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The filesystem gains the USERSPACE_STACK incomat bit and the
s_cluster_info field on the superblock.  When a userspace stack is in
use, the name of the stack is stored on-disk for mount-time
verification.

The "cluster_stack" option is added to mount(2) processing.  The mount
process needs to pass the matching stack name.  If the passed name and
the on-disk name do not match, the mount is failed.

When using the classic o2cb stack, the incompat bit is *not* set and no
mount option is used other than the usual heartbeat=local.  Thus, the
filesystem is compatible with older tools.

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

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Joel Becker 2008-02-01 15:08:23 -08:00 • committed by Mark Fasheh

parent 74ae4e104d

commit b61817e116

3 changed files with 134 additions and 3 deletions

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7

fs/ocfs2/ocfs2.h

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40

fs/ocfs2/ocfs2_fs.h

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90

fs/ocfs2/super.c

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