diff options
| author |   Neale Ranns <neale@graphiant.com> | 2020-12-21 08:29:34 +0000 |
|---|---|---|
| committer |   Ole Tr�an <otroan@employees.org> | 2021-02-15 17:27:48 +0000 |
| commit | 8f5fef2c78b95de1a636ce27111722b71702212a (patch) | |
| tree | a0ebd0189969ccae1f0bdd7c1a9c18dd7a066f2e /src/vnet/dpo/dpo.h | |
| parent | 54be0cc044f445853fae7b8995c477605250af16 (diff) | |
ip: Path MTU
Type: feature
Support setting the MTU for a peer on an interface. The minimum value of
the path and interface MTU is used at forwarding time.
the path MTU is specified for a given peer, by address and table-ID.
In the forwarding plane the MTU is enfored either:
1 - if the peer is attached, then the MTU is set on the peer's
adjacency
2 - if the peer is not attached, it is remote, then a DPO is added to
the peer's FIB entry to perform the necessary fragmentation.
Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: I8b9ea6a07868b50e97e2561f18d9335407dea7ae
Diffstat (limited to 'src/vnet/dpo/dpo.h')
| -rw-r--r-- | src/vnet/dpo/dpo.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/vnet/dpo/dpo.h b/src/vnet/dpo/dpo.h index ee4990d0058..e9976c2dd87 100644 --- a/src/vnet/dpo/dpo.h +++ b/src/vnet/dpo/dpo.h @@ -24,6 +24,8 @@ * instances. */ +// clang-format off + #ifndef __DPO_H__ #define __DPO_H__ @@ -362,6 +364,16 @@ extern void dpo_stack_from_node(u32 child_node, extern u32 dpo_get_urpf(const dpo_id_t *dpo); /** + * Get the MTU DPO + * + * @param dpo + * The DPO from which to get the MTU + * + * @return MTU (0xffff if something more usefull was unavailable) + */ +extern u16 dpo_get_mtu(const dpo_id_t *dpo); + +/** * @brief A lock function registered for a DPO type */ typedef void (*dpo_lock_fn_t)(dpo_id_t *dpo); @@ -389,6 +401,11 @@ typedef u32* (*dpo_get_next_node_t)(const dpo_id_t *dpo); typedef u32 (*dpo_get_urpf_t)(const dpo_id_t *dpo); /** + * @brief Given a DPO instance return the MTU + */ +typedef u16 (*dpo_get_mtu_t)(const dpo_id_t *dpo); + +/** * @brief Called during FIB interposition when the originally * registered DPO is used to 'clone' an instance for interposition * at a particular location in the FIB graph. @@ -433,6 +450,10 @@ typedef struct dpo_vft_t_ */ dpo_get_urpf_t dv_get_urpf; /** + * Get MTU + */ + dpo_get_mtu_t dv_get_mtu; + /** * Signal on an interposed child that the parent has changed */ dpo_mk_interpose_t dv_mk_interpose; @@ -548,3 +569,5 @@ do { \ if ((YESNO)) vlib_worker_thread_barrier_release((VM)); #endif + +// clang-format on |