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authorJoel Becker <joel.becker@oracle.com>2008-01-31 02:38:24 +0300
committerMark Fasheh <mfasheh@suse.com>2008-04-18 19:56:04 +0400
commit19fdb624dc8ccb663f6e48b3a3a3fa4e4e567fc1 (patch)
treeb50e358686ca63789af4af07526e0d21f2806bfb /fs/ocfs2/stackglue.c
parent4670c46ded9a18268d1265417ff4ac72145a7917 (diff)
downloadlinux-19fdb624dc8ccb663f6e48b3a3a3fa4e4e567fc1.tar.xz
ocfs2: Abstract out node number queries.
ocfs2 asks the cluster stack for the local node's node number for two reasons; to fill the slot map and to print it. While the slot map isn't necessary for userspace cluster stacks, the printing is very nice for debugging. Thus we add ocfs2_cluster_this_node() as a generic API to get this value. It is anticipated that the slot map will not be used under a userspace cluster stack, so validity checks of the node num only need to exist in the slot map code. Otherwise, it just gets used and printed as an opaque value. [ Fixed up some "int" versus "unsigned int" issues and made osb->node_num truly opaque. --Mark ] Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/stackglue.c')
-rw-r--r--fs/ocfs2/stackglue.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index f6f309a08344..814686356cc6 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -25,6 +25,8 @@
#include <linux/fs.h>
#include "cluster/masklog.h"
+#include "cluster/nodemanager.h"
+
#include "stackglue.h"
static struct ocfs2_locking_protocol *lproto;
@@ -371,6 +373,21 @@ int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn)
return 0;
}
+int ocfs2_cluster_this_node(unsigned int *node)
+{
+ int node_num;
+
+ node_num = o2nm_this_node();
+ if (node_num == O2NM_INVALID_NODE_NUM)
+ return -ENOENT;
+
+ if (node_num >= O2NM_MAX_NODES)
+ return -EOVERFLOW;
+
+ *node = node_num;
+ return 0;
+}
+
void o2cb_get_stack(struct ocfs2_locking_protocol *proto)
{
BUG_ON(proto == NULL);