add basic RBridge structure
add basic TRILL constant
define rbr_nickinfo structure which represent distant RBridge information
Signed-off-by: Ahmed Amamou <ah...@gandi.net>
Signed-off-by: Kamel Haddadou <ka...@gandi.net>
---
net/bridge/rbr_private.h | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
create mode 100644 net/bridge/rbr_private.h
diff --git a/net/bridge/rbr_private.h b/net/bridge/rbr_private.h
new file mode 100644
index 0000000..8d9fb4c
--- /dev/null
+++ b/net/bridge/rbr_private.h
@@ -0,0 +1,60 @@
+#ifndef _RBR_PRIVATE_H
+#define _RBR_PRIVATE_H
+
+#include <linux/atomic.h>
+
+#define RBRIDGE_NICKNAME_MIN 0x0000
+#define RBRIDGE_NICKNAME_MAX 0xFFFF
+
+/* Define well-known nicknames */
+#define RBRIDGE_NICKNAME_NONE RBRIDGE_NICKNAME_MIN
+#define RBRIDGE_NICKNAME_UNUSED RBRIDGE_NICKNAME_MAX
+
+#define TRILL_PROTOCOL_VERS 0 /* th_version */
+#define TRILL_DEFAULT_HOPS 21 /* th_hopcount */
+#define VALID_NICK(n) ((n) != RBRIDGE_NICKNAME_NONE && \
+ (n) != RBRIDGE_NICKNAME_UNUSED)
+
+struct rbr_nickinfo {
+ /* Nickname of the RBridge */
+ u16 nick;
+ /* Next-hop SNPA address to reach this RBridge */
+ u8 adjsnpa[ETH_ALEN];
+ /* Link on our system to use to reach next-hop */
+ u32 linkid;
+ /* Num of *our* adjacencies on a tree rooted at this RBridge */
+ u16 adjcount;
+ /* Num of distribution tree root nicks chosen by this RBridge */
+ u16 dtrootcount;
+ /* Variable size bytes to store adjacency nicks, distribution
+ * tree roots. Adjacency nicks and
+ * distribution tree roots are 16-bit fields.
+ */
+};
+
+struct rbr_node {
+ struct rbr_nickinfo *rbr_ni;
+ atomic_t refs; /* reference count */
+};
+
+struct rbr {
+ u16 nick; /* our nickname */
+ u16 treeroot; /* tree root nickname */
+ struct rbr_node *rbr_nodes[RBRIDGE_NICKNAME_MAX];
+ struct net_bridge *br; /* back pointer */
+};
+
+/* Access the adjacency nick list at the end of rbr_nickinfo */
+#define RBR_NI_ADJNICKSPTR(v) ((u16 *)((struct rbr_nickinfo *)(v) + 1))
+#define RBR_NI_ADJNICK(v, n) (RBR_NI_ADJNICKSPTR(v)[(n)])
+
+/* Access the DT root nick list in rbr_nickinfo after adjacency nicks */
+#define RBR_NI_DTROOTNICKSPTR(v) (RBR_NI_ADJNICKSPTR(v) + (v)->adjcount)
+#define RBR_NI_DTROOTNICK(v, n) (RBR_NI_DTROOTNICKSPTR(v)[(n)])
+
+#define RBR_NI_TOTALSIZE(v) (\
+ (sizeof(struct rbr_nickinfo)) + \
+ (sizeof(u16) * (v)->adjcount) + \
+ (sizeof(u16) * (v)->dtrootcount)\
+ )
+#endif
--
2.1.4
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