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| author | Jon Paul Maloy <jon.maloy@ericsson.com> | 2015-07-30 18:24:18 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-30 17:25:13 -0700 |
| commit | 66996b6c47ed7f6bbb01a768e23fae262c7db8e0 (patch) | |
| tree | 2567778802dedcde9c2b72430919038999512373 /net/tipc/node.c | |
| parent | 655fb243b8ae5e652f744311bcb6e806e83cea1e (diff) | |
| download | linux-66996b6c47ed7f6bbb01a768e23fae262c7db8e0.tar.gz | |
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>
Diffstat (limited to 'net/tipc/node.c')
| -rw-r--r-- | net/tipc/node.c | 89 |
1 files changed, 82 insertions, 7 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c index 65c2c80cffe7..6b18d73830ca 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -494,8 +494,12 @@ static void tipc_node_fsm_evt(struct tipc_node *n, int evt) case SELF_LOST_CONTACT_EVT: case PEER_LOST_CONTACT_EVT: break; + case NODE_SYNCH_END_EVT: + case NODE_SYNCH_BEGIN_EVT: + case NODE_FAILOVER_BEGIN_EVT: + case NODE_FAILOVER_END_EVT: default: - pr_err("Unknown node fsm evt %x/%x\n", state, evt); + goto illegal_evt; } break; case SELF_UP_PEER_UP: @@ -506,11 +510,19 @@ static void tipc_node_fsm_evt(struct tipc_node *n, int evt) case PEER_LOST_CONTACT_EVT: state = SELF_LEAVING_PEER_DOWN; break; + case NODE_SYNCH_BEGIN_EVT: + state = NODE_SYNCHING; + break; + case NODE_FAILOVER_BEGIN_EVT: + state = NODE_FAILINGOVER; + break; case SELF_ESTABL_CONTACT_EVT: case PEER_ESTABL_CONTACT_EVT: + case NODE_SYNCH_END_EVT: + case NODE_FAILOVER_END_EVT: break; default: - pr_err("Unknown node fsm evt %x/%x\n", state, evt); + goto illegal_evt; } break; case SELF_DOWN_PEER_LEAVING: @@ -522,8 +534,12 @@ static void tipc_node_fsm_evt(struct tipc_node *n, int evt) case PEER_ESTABL_CONTACT_EVT: case SELF_LOST_CONTACT_EVT: break; + case NODE_SYNCH_END_EVT: + case NODE_SYNCH_BEGIN_EVT: + case NODE_FAILOVER_BEGIN_EVT: + case NODE_FAILOVER_END_EVT: default: - pr_err("Unknown node fsm evt %x/%x\n", state, evt); + goto illegal_evt; } break; case SELF_UP_PEER_COMING: @@ -537,8 +553,12 @@ static void tipc_node_fsm_evt(struct tipc_node *n, int evt) case SELF_ESTABL_CONTACT_EVT: case PEER_LOST_CONTACT_EVT: break; + case NODE_SYNCH_END_EVT: + case NODE_SYNCH_BEGIN_EVT: + case NODE_FAILOVER_BEGIN_EVT: + case NODE_FAILOVER_END_EVT: default: - pr_err("Unknown node fsm evt %x/%x\n", state, evt); + goto illegal_evt; } break; case SELF_COMING_PEER_UP: @@ -552,8 +572,12 @@ static void tipc_node_fsm_evt(struct tipc_node *n, int evt) case SELF_LOST_CONTACT_EVT: case PEER_ESTABL_CONTACT_EVT: break; + case NODE_SYNCH_END_EVT: + case NODE_SYNCH_BEGIN_EVT: + case NODE_FAILOVER_BEGIN_EVT: + case NODE_FAILOVER_END_EVT: default: - pr_err("Unknown node fsm evt %x/%x\n", state, evt); + goto illegal_evt; } break; case SELF_LEAVING_PEER_DOWN: @@ -565,16 +589,67 @@ static void tipc_node_fsm_evt(struct tipc_node *n, int evt) case PEER_ESTABL_CONTACT_EVT: case PEER_LOST_CONTACT_EVT: break; + case NODE_SYNCH_END_EVT: + case NODE_SYNCH_BEGIN_EVT: + case NODE_FAILOVER_BEGIN_EVT: + case NODE_FAILOVER_END_EVT: + default: + goto illegal_evt; + } + break; + case NODE_FAILINGOVER: + switch (evt) { + case SELF_LOST_CONTACT_EVT: + state = SELF_DOWN_PEER_LEAVING; + break; + case PEER_LOST_CONTACT_EVT: + state = SELF_LEAVING_PEER_DOWN; + break; + case NODE_FAILOVER_END_EVT: + state = SELF_UP_PEER_UP; + break; + case NODE_FAILOVER_BEGIN_EVT: + case SELF_ESTABL_CONTACT_EVT: + case PEER_ESTABL_CONTACT_EVT: + break; + case NODE_SYNCH_BEGIN_EVT: + case NODE_SYNCH_END_EVT: default: - pr_err("Unknown node fsm evt %x/%x\n", state, evt); + goto illegal_evt; + } + break; + case NODE_SYNCHING: + switch (evt) { + case SELF_LOST_CONTACT_EVT: + state = SELF_DOWN_PEER_LEAVING; + break; + case PEER_LOST_CONTACT_EVT: + state = SELF_LEAVING_PEER_DOWN; + break; + case NODE_SYNCH_END_EVT: + state = SELF_UP_PEER_UP; + break; + case NODE_FAILOVER_BEGIN_EVT: + state = NODE_FAILINGOVER; + break; + case NODE_SYNCH_BEGIN_EVT: + case SELF_ESTABL_CONTACT_EVT: + case PEER_ESTABL_CONTACT_EVT: + break; + case NODE_FAILOVER_END_EVT: + default: + goto illegal_evt; } break; default: pr_err("Unknown node fsm state %x\n", state); break; } - n->state = state; + return; + +illegal_evt: + pr_err("Illegal node fsm evt %x in state %x\n", evt, state); } bool tipc_node_filter_skb(struct tipc_node *n, struct tipc_link *l, |