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datapath: Refactor actions in terms of match fields.

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Almost all current actions can be expressed in the form of
push/pop/set <field>, where field is one of the match fields. We can
create three base actions and take a field. This has both a nice
symmetry and avoids inconsistencies where we can match on the vlan
TPID but not set it.
Following patch converts all actions to this new format.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>

Bug #7115
This commit is contained in:
Pravin B Shelar
2011-10-21 14:38:54 -07:00
parent a0003c0c35
commit 4edb9ae90e
10 changed files with 615 additions and 422 deletions
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38
include/linux/openvswitch.h
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@@ -423,21 +423,37 @@ enum ovs_userspace_attr {
#define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
/* Action types. */
/**
* enum ovs_action_attr - Action types.
*
* @OVS_ACTION_ATTR_OUTPUT: Output packet to port passed as NLA data.
* @OVS_ACTION_ATTR_USERSPACE: Nested %OVS_USERSPACE_ATTR_ attributes specifying
* PID.
* @OVS_ACTION_ATTR_PUSH: Nested %OVS_KEY_ATTR_* attribute specifying header to
* push to given packet.
* E.g. Push vlan tag action would be NLA of %OVS_ACTION_ATTR_PUSH type with
* nested attribute of type %OVS_KEY_ATTR_8021Q with struct ovs_key_8021q
* as NLA data.
* @OVS_ACTION_ATTR_POP: Pop header according to %OVS_KEY_ATTR_ sent as
* attribute data.
* @OVS_ACTION_ATTR_SET: Nested %OVS_KEY_ATTR_* attribute specifying the
* field to set to given packet.
* @OVS_ACTION_ATTR_SET_PRIORITY: A set skb->priority to 32-bit number passed
* as NLA data.
* @OVS_ACTION_ATTR_POP_PRIORITY: Restore skb->priority to original value.
* @OVS_ACTION_ATTR_SAMPLE: Execute set of actions according to probability
* %OVS_SAMPLE_ATTR_PROBABILITY.
*
* Only a single field can be set with a single %OVS_ACTION_ATTR_{SET,PUSH}.
*/
enum ovs_action_attr {
OVS_ACTION_ATTR_UNSPEC,
OVS_ACTION_ATTR_OUTPUT, /* Output to switch port. */
OVS_ACTION_ATTR_USERSPACE, /* Nested OVS_USERSPACE_ATTR_*. */
OVS_ACTION_ATTR_PUSH_VLAN, /* Set the 802.1q TCI value. */
OVS_ACTION_ATTR_POP_VLAN, /* Strip the 802.1q header. */
OVS_ACTION_ATTR_SET_DL_SRC, /* Ethernet source address. */
OVS_ACTION_ATTR_SET_DL_DST, /* Ethernet destination address. */
OVS_ACTION_ATTR_SET_NW_SRC, /* IPv4 source address. */
OVS_ACTION_ATTR_SET_NW_DST, /* IPv4 destination address. */
OVS_ACTION_ATTR_SET_NW_TOS, /* IP ToS/DSCP field (6 bits). */
OVS_ACTION_ATTR_SET_TP_SRC, /* TCP/UDP source port. */
OVS_ACTION_ATTR_SET_TP_DST, /* TCP/UDP destination port. */
OVS_ACTION_ATTR_SET_TUNNEL, /* Set the encapsulating tunnel ID. */
OVS_ACTION_ATTR_PUSH, /* Push packet header. */
OVS_ACTION_ATTR_POP, /* Pop packet header. */
OVS_ACTION_ATTR_SET, /* Set packet field(s). */
OVS_ACTION_ATTR_SET_PRIORITY, /* Set skb->priority. */
OVS_ACTION_ATTR_POP_PRIORITY, /* Restore original skb->priority. */
OVS_ACTION_ATTR_SAMPLE, /* Nested OVS_SAMPLE_ATTR_*. */