ocfs2/dlm: Ignore LVBs of locks

Commit Message

Zhangguanghui May 16, 2015, 3:39 a.m. UTC

In the process of  dlm_prepare_lvb_for_migration?

if  all valid locks have not the  same LVB? then  BUGs.

the patch ensures that the other valid locks have the

same a LVB from the first valid lock  to solute the problem of BUGs


Finally, any feedback about this process (positive or negative) would be
greatly appreciated.
Thanks,
        --zgh


static void dlm_prepare_lvb_for_migration(struct dlm_lock *lock, struct dlm_migratable_lockres *mres,int queue)


On Mon, Jan 25, 2010 at 04:57:39PM -0800, Sunil Mushran wrote:
> During lock resource migration, o2dlm fills the packet with a LVB from the
> first valid lock. For sanity, it ensures that the other valid locks have the
> same LVB. If not, it BUGs.
>
> The valid locks are ones that have granted EX or PR lock levels and are either
> on the Granted or Converting lists. Locks in the Blocked list cannot have a
> valid LVB.




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Patch

--- dlmrecovery.c 2014-12-17 01:39:45.000000000 +0800
+++ dlmrecovery0.c 2015-05-16 10:59:59.683924862 +0800
@@ -1215,7 +1215,10 @@ 
lock->lockres->lockname.len, lock->lockres->lockname.name,
lock->ml.node);
dlm_print_one_lock_resource(lock->lockres);
- BUG();
+
+ /* Ensure the lvb copied for migration matches the first valid locks */
+ memcpy(lock->lksb->lvb, mres->lvb, DLM_LVB_LEN);
+ return;
}