Add 'clone' action to kernel datapath by using existing functions. When actions within clone don't modify the current flow, the flow key is not cloned before executing clone actions. This is a follow up patch for this incomplete work: https://patchwork.ozlabs.org/patch/722096/ v1 -> v2: Refactor as advised by reviewer.
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| @@ -840,6 +840,8 @@ struct ovs_action_push_eth { · 839 unmodified lines | ||
| 840 | 840 | * @OVS_ACTION_ATTR_POP_NSH: pop the outermost NSH header off the packet. |
| 841 | 841 | * @OVS_ACTION_ATTR_METER: Run packet through a meter, which may drop the |
| 842 | 842 | * packet, or modify the packet (e.g., change the DSCP field). |
| 843 | + * @OVS_ACTION_ATTR_CLONE: make a copy of the packet and execute a list of | |
| 844 | + * actions without affecting the original packet and key. | |
| 843 | 845 | * |
| 844 | 846 | * Only a single header can be set with a single %OVS_ACTION_ATTR_SET. Not all |
| 845 | 847 | * fields within a header are modifiable, e.g. the IPv4 protocol and fragment |
| @@ -873,6 +875,7 @@ enum ovs_action_attr { · 27 unmodified lines | ||
| 873 | 875 | OVS_ACTION_ATTR_PUSH_NSH, /* Nested OVS_NSH_KEY_ATTR_*. */ |
| 874 | 876 | OVS_ACTION_ATTR_POP_NSH, /* No argument. */ |
| 875 | 877 | OVS_ACTION_ATTR_METER, /* u32 meter ID. */ |
| 878 | + OVS_ACTION_ATTR_CLONE, /* Nested OVS_CLONE_ATTR_*. */ | |
| 876 | 879 | |
| 877 | 880 | __OVS_ACTION_ATTR_MAX, /* Nothing past this will be accepted |
| 878 | 881 | * from userspace. */ |