ethdev: add generic TTL rewrite actions

rewrite TTL by decrease or just set it directly
it's not necessary to check if the final result
is zero or not

This is slightly different from the one defined
by openflow and more generic

Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>

diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index a5ec441..e766329 100644 (file)
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -2203,6 +2203,42 @@ Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
    | no properties |
    +---------------+
 
+Action: ``DEC_TTL``
+^^^^^^^^^^^^^^^^^^^
+
+Decrease TTL value.
+
+If there is no valid RTE_FLOW_ITEM_TYPE_IPV4 or RTE_FLOW_ITEM_TYPE_IPV6
+in pattern, Some PMDs will reject rule because behaviour will be undefined.
+
+.. _table_rte_flow_action_dec_ttl:
+
+.. table:: DEC_TTL
+
+   +---------------+
+   | Field         |
+   +===============+
+   | no properties |
+   +---------------+
+
+Action: ``SET_TTL``
+^^^^^^^^^^^^^^^^^^^
+
+Assigns a new TTL value.
+
+If there is no valid RTE_FLOW_ITEM_TYPE_IPV4 or RTE_FLOW_ITEM_TYPE_IPV6
+in pattern, Some PMDs will reject rule because behaviour will be undefined.
+
+.. _table_rte_flow_action_set_ttl:
+
+.. table:: SET_TTL
+
+   +---------------+--------------------+
+   | Field         | Value              |
+   +===============+====================+
+   | ``ttl_value`` | new TTL value      |
+   +---------------+--------------------+
+
 Negative types
 ~~~~~~~~~~~~~~
 

diff --git a/lib/librte_ethdev/rte_flow.c b/lib/librte_ethdev/rte_flow.c
index bc9e719..5040c76 100644 (file)
--- a/lib/librte_ethdev/rte_flow.c
+++ b/lib/librte_ethdev/rte_flow.c
@@ -136,6 +136,8 @@ static const struct rte_flow_desc_data rte_flow_desc_action[] = {
        MK_FLOW_ACTION(SET_TP_DST,
                       sizeof(struct rte_flow_action_set_tp)),
        MK_FLOW_ACTION(MAC_SWAP, 0),
+       MK_FLOW_ACTION(DEC_TTL, 0),
+       MK_FLOW_ACTION(SET_TTL, sizeof(struct rte_flow_action_set_ttl)),
 };
 
 static int

diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
index 68bbf57..79bcb29 100644 (file)
--- a/lib/librte_ethdev/rte_flow.h
+++ b/lib/librte_ethdev/rte_flow.h
@@ -1579,6 +1579,20 @@ enum rte_flow_action_type {
         * No associated configuration structure.
         */
        RTE_FLOW_ACTION_TYPE_MAC_SWAP,
+
+       /**
+        * Decrease TTL value directly
+        *
+        * No associated configuration structure.
+        */
+       RTE_FLOW_ACTION_TYPE_DEC_TTL,
+
+       /**
+        * Set TTL value
+        *
+        * See struct rte_flow_action_set_ttl
+        */
+       RTE_FLOW_ACTION_TYPE_SET_TTL,
 };
 
 /**
@@ -1987,6 +2001,15 @@ struct rte_flow_action_set_tp {
        rte_be16_t port;
 };
 
+/**
+ * RTE_FLOW_ACTION_TYPE_SET_TTL
+ *
+ * Set the TTL value directly for IPv4 or IPv6
+ */
+struct rte_flow_action_set_ttl {
+       uint8_t ttl_value;
+};
+
 /*
  * Definition of a single action.
  *