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Jon Paul Maloy 66996b6c47 tipc: extend node FSM 
In the next commit, we will move link synch/failover orchestration to
the link aggregation level. In order to do this, we first need to extend
the node FSM with two more states, NODE_SYNCHING and NODE_FAILINGOVER,
plus four new events to enter and leave those states.

This commit introduces this change, without yet making use of it.
The node FSM now looks as follows:

                           +-----------------------------------------+
                           |                            PEER_DOWN_EVT|
                           |                                         |
  +------------------------+----------------+                        |
  |SELF_DOWN_EVT           |                |                        |
  |                        |                |                        |
  |              +-----------+          +-----------+                |
  |              |NODE_      |          |NODE_      |                |
  |   +----------|FAILINGOVER|<---------|SYNCHING   |------------+   |
  |   |SELF_     +-----------+ FAILOVER_+-----------+    PEER_   |   |
  |   |DOWN_EVT   |         A  BEGIN_EVT A         |     DOWN_EVT|   |
  |   |           |         |            |         |             |   |
  |   |           |         |            |         |             |   |
  |   |           |FAILOVER_|FAILOVER_   |SYNCH_   |SYNCH_       |   |
  |   |           |END_EVT  |BEGIN_EVT   |BEGIN_EVT|END_EVT      |   |
  |   |           |         |            |         |             |   |
  |   |           |         |            |         |             |   |
  |   |           |        +--------------+        |             |   |
  |   |           +------->|   SELF_UP_   |<-------+             |   |
  |   |   +----------------|   PEER_UP    |------------------+   |   |
  |   |   |SELF_DOWN_EVT   +--------------+     PEER_DOWN_EVT|   |   |
  |   |   |                   A          A                   |   |   |
  |   |   |                   |          |                   |   |   |
  |   |   |        PEER_UP_EVT|          |SELF_UP_EVT        |   |   |
  |   |   |                   |          |                   |   |   |
  V   V   V                   |          |                   V   V   V
+------------+       +-----------+    +-----------+       +------------+
|SELF_DOWN_  |       |SELF_UP_   |    |PEER_UP_   |       |PEER_DOWN   |
|PEER_LEAVING|<------|PEER_COMING|    |SELF_COMING|------>|SELF_LEAVING|
+------------+ SELF_ +-----------+    +-----------+ PEER_ +------------+
       |       DOWN_EVT       A          A          DOWN_EVT     |
       |                      |          |                       |
       |                      |          |                       |
       |           SELF_UP_EVT|          |PEER_UP_EVT            |
       |                      |          |                       |
       |                      |          |                       |
       |PEER_DOWN_EVT       +--------------+        SELF_DOWN_EVT|
       +------------------->|  SELF_DOWN_  |<--------------------+
                            |  PEER_DOWN   |
                            +--------------+

Tested-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-30 17:25:13 -07:00
..
addr.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
addr.h tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
bcast.c tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
bcast.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
bearer.c tipc: move all link_reset() calls to link aggregation level 2015-07-30 17:25:13 -07:00
bearer.h tipc: make media xmit call outside node spinlock context 2015-07-20 20:41:15 -07:00
core.c tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
core.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
discover.c tipc: move link creation from neighbor discoverer to node 2015-07-20 20:41:14 -07:00
discover.h tipc: involve namespace infrastructure 2015-01-12 16:24:32 -05:00
eth_media.c tipc: make media address offset a common define 2015-02-27 18:18:48 -05:00
ib_media.c tipc: rename media/msg related definitions 2015-02-27 18:18:48 -05:00
Kconfig tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
link.c tipc: reverse call order for link_reset()->node_link_down() 2015-07-30 17:25:13 -07:00
link.h tipc: move all link_reset() calls to link aggregation level 2015-07-30 17:25:13 -07:00
Makefile tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
msg.c tipc: clean up socket layer message reception 2015-07-26 16:31:50 -07:00
msg.h tipc: clean up socket layer message reception 2015-07-26 16:31:50 -07:00
name_distr.c tipc: make media xmit call outside node spinlock context 2015-07-20 20:41:15 -07:00
name_distr.h tipc: resolve race problem at unicast message reception 2015-02-05 16:00:02 -08:00
name_table.c tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
name_table.h tipc: convert legacy nl name table dump to nl compat 2015-02-09 13:20:48 -08:00
net.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
net.h tipc: make tipc node table aware of net namespace 2015-01-12 16:24:32 -05:00
netlink.c tipc: move and rename the legacy nl api to "nl compat" 2015-02-09 13:20:47 -08:00
netlink.h tipc: move and rename the legacy nl api to "nl compat" 2015-02-09 13:20:47 -08:00
netlink_compat.c tipc: send explicit not supported error in nl compat 2015-05-09 16:40:03 -04:00
node.c tipc: extend node FSM 2015-07-30 17:25:13 -07:00
node.h tipc: extend node FSM 2015-07-30 17:25:13 -07:00
server.c tipc: use sock_create_kern interface to create kernel socket 2015-05-14 13:39:33 -04:00
server.h tipc: make subscriber server support net namespace 2015-01-12 16:24:33 -05:00
socket.c tipc: clean up socket layer message reception 2015-07-26 16:31:50 -07:00
socket.h tipc: clean up socket layer message reception 2015-07-26 16:31:50 -07:00
subscr.c tipc: adjust locking policy of subscription 2015-05-04 15:04:01 -04:00
subscr.h tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
sysctl.c tipc: add name distributor resiliency queue 2014-09-01 17:51:48 -07:00
udp_media.c udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb(). 2015-04-07 15:29:08 -04:00