[Ocfs2-devel] [PATCH] Call userspace script when self-fencing

[nagius at astek.fr]

   Hi,

According to comments in file fs/ocfs2/cluster/quorum.c:70 about the  
self-fencing operations :

/* It should instead flip the file
 * system RO and call some userspace script. */

So, I tried to add it (but i did'nt find a way to flip the fs in RO).

Here is a proposal for this functionnality, based on ocfs2-1.4.7.
This patch add an entry 'fence_cmd' in /sys to specify an userspace  
fence script.
This behavior can be selected by echoing the new keyword 'cmd' in  
fence_method.

Example :

echo "/usr/local/sbin/my_fencer"> /sys/kernel/config/cluster/ocfs2/fence_cmd
echo "cmd"> /sys/kernel/config/cluster/ocfs2/fence_method

Hope this could interest someone.

   Nicolas AGIUS

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