Network transaction control method and executing method, network controller, and forwarding device

A network controller for use in a system in which control and forwarding are separated, the network controller comprising:

• a transceiver unit, configured to:
• communicate with each forwarding device applied to the system in which control and forwarding are separated,
• send, according to a network transaction, an operation set package comprising at least one operation instruction to at least two of the forwarding devices, wherein the operation set package comprises an atomic operation identifier used to uniquely identify the network transaction,
• receiver an execution status message fed back by each of the forwarding devices, wherein the execution status message comprises the atomic operation identifier and an operation result of each operation instruction executed by each of the forwarding devices, and
• an operation result determining unit configured to:
• determine, according to each of the execution status messages, that an operation result of any operation instruction executed by any forwarding device is:
• execution failed,
• separately send a rollback control instruction comprising forwarding devices for which no execution failure has been determined, so as to instruct each of the forwarding devices for which no execution failure has been determined, to restore to a state that is prior to execution of each operation instruction in the operation set package, and
• determine, according to each of the execution status messages, the operation result of each operation instruction executed by each of the forwarding devices.

A forwarding device for use in a system in which control and forwarding are separated, the forwarding device comprising:

• a transceiver unit, configured to:
• communicate with a network controller applied to the system in which control and forwarding are separated,
• receive an operation set package sent by the network controller,
• send an execution status message to the network controller after a status message determining unit determines the execution status message, and
• wherein the operation set package comprises an atomic operation identifier and at least one operation instruction, the atomic operation identifier is used to uniquely identify one network transaction, the network transaction is corresponding to at least one operation set package, and the execution status message comprises the atomic operation identifier and an operation result of an operation instruction;
• an executing unit, configured to execute the operation instruction;
• wherein the status message determining unit is configured to determine the execution status message according to a situation of execution of the operation instruction by the executing unit;
• and
• a status restoring unit, configured to:
• if execution of any operation instruction fails, restore to a state that is prior to execution of each operation instruction in the operation set package.