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flow: Enable matching on new field 'pkt_mark'.

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The Linux kernel datapath enables matching and setting the skb mark
but this functionality is currently used only internally by
ovs-vswitchd. This exposes it through NXM to enable external
controllers to interact with other kernel subsystems. Although this
is simply exporting the skb mark, the intention is that this is a
platform independent mechanism to access some system metadata and
therefore may have different implementations on various systems.

Bug #17855

Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
This commit is contained in:
Jesse Gross
2013-08-06 12:57:16 -07:00
parent ed2e724593
commit ac923e910e
13 changed files with 84 additions and 16 deletions
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17
include/openflow/nicira-ext.h
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@@ -477,6 +477,7 @@ OFP_ASSERT(sizeof(struct nx_action_pop_queue) == 16);
* - NXM_NX_ND_SLL
* - NXM_NX_ND_TLL
* - NXM_NX_REG(idx) for idx in the switch's accepted range.
* - NXM_NX_PKT_MARK
* - NXM_NX_TUN_IPV4_SRC
* - NXM_NX_TUN_IPV4_DST
*
@@ -498,6 +499,8 @@ OFP_ASSERT(sizeof(struct nx_action_pop_queue) == 16);
*
* - NXM_NX_REG(idx) for idx in the switch's accepted range.
*
* - NXM_NX_PKT_MARK
*
* - NXM_OF_VLAN_TCI. Modifying this field's value has side effects on the
* packet's 802.1Q header. Setting a value with CFI=0 removes the 802.1Q
* header (if any), ignoring the other bits. Setting a value with CFI=1
@@ -1766,6 +1769,20 @@ OFP_ASSERT(sizeof(struct nx_action_output_reg) == 24);
#define NXM_NX_TUN_IPV4_DST NXM_HEADER (0x0001, 32, 4)
#define NXM_NX_TUN_IPV4_DST_W NXM_HEADER_W(0x0001, 32, 4)
/* Metadata marked onto the packet in a system-dependent manner.
*
* The packet mark may be used to carry contextual information
* to other parts of the system outside of Open vSwitch. As a
* result, the semantics depend on system in use.
*
* Prereqs: None.
*
* Format: 32-bit integer in network byte order.
*
* Masking: Fully maskable. */
#define NXM_NX_PKT_MARK NXM_HEADER (0x0001, 33, 4)
#define NXM_NX_PKT_MARK_W NXM_HEADER_W(0x0001, 33, 4)
/* ## --------------------- ## */
/* ## Requests and replies. ## */
/* ## --------------------- ## */