[PATCH 2/2] node: use node mbuf dynfield in ip4 nodes

[Nitin Saxena <nsaxena@marvell.com>]

- Used global node mbuf in ip[4|6]_lookup/rewrite nodes
- Redefine node_mbuf_priv1() to rte_node_mbuf_overload_fields_get()

Signed-off-by: Nitin Saxena <nsaxena@marvell.com>
---
 lib/node/ip4_lookup.c             | 14 ++++-------
 lib/node/ip4_rewrite.c            | 15 +++++-------
 lib/node/ip6_lookup.c             | 15 +++++-------
 lib/node/ip6_rewrite.c            | 14 ++++-------
 lib/node/node_private.h           | 40 +++----------------------------
 lib/node/rte_node_mbuf_dynfield.h |  9 +++++++
 6 files changed, 34 insertions(+), 73 deletions(-)

diff --git a/lib/node/ip4_lookup.c b/lib/node/ip4_lookup.c
index 0b474cd2bc..7e9d21a9c9 100644
--- a/lib/node/ip4_lookup.c
+++ b/lib/node/ip4_lookup.c
@@ -31,8 +31,6 @@ struct ip4_lookup_node_ctx {
 	int mbuf_priv1_off;
 };

-int node_mbuf_priv1_dynfield_offset = -1;
-
 static struct ip4_lookup_node_main ip4_lookup_nm;

 #define IP4_LOOKUP_NODE_LPM(ctx) \
@@ -180,17 +178,15 @@ ip4_lookup_node_init(const struct rte_graph *graph, struct rte_node *node)
 {
 	uint16_t socket, lcore_id;
 	static uint8_t init_once;
-	int rc;
+	int rc, dyn;

 	RTE_SET_USED(graph);
 	RTE_BUILD_BUG_ON(sizeof(struct ip4_lookup_node_ctx) > RTE_NODE_CTX_SZ);

+	dyn = rte_node_mbuf_dynfield_register();
+	if (dyn < 0)
+		return -rte_errno;
 	if (!init_once) {
-		node_mbuf_priv1_dynfield_offset = rte_mbuf_dynfield_register(
-				&node_mbuf_priv1_dynfield_desc);
-		if (node_mbuf_priv1_dynfield_offset < 0)
-			return -rte_errno;
-
 		/* Setup LPM tables for all sockets */
 		RTE_LCORE_FOREACH(lcore_id)
 		{
@@ -208,7 +204,7 @@ ip4_lookup_node_init(const struct rte_graph *graph, struct rte_node *node)

 	/* Update socket's LPM and mbuf dyn priv1 offset in node ctx */
 	IP4_LOOKUP_NODE_LPM(node->ctx) = ip4_lookup_nm.lpm_tbl[graph->socket];
-	IP4_LOOKUP_NODE_PRIV1_OFF(node->ctx) = node_mbuf_priv1_dynfield_offset;
+	IP4_LOOKUP_NODE_PRIV1_OFF(node->ctx) = dyn;

 #if defined(__ARM_NEON) || defined(RTE_ARCH_X86)
 	if (rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_128)
diff --git a/lib/node/ip4_rewrite.c b/lib/node/ip4_rewrite.c
index 34a920df5e..b05decc1a3 100644
--- a/lib/node/ip4_rewrite.c
+++ b/lib/node/ip4_rewrite.c
@@ -258,19 +258,16 @@ ip4_rewrite_node_process(struct rte_graph *graph, struct rte_node *node,
 static int
 ip4_rewrite_node_init(const struct rte_graph *graph, struct rte_node *node)
 {
-	static bool init_once;
+	int dyn;

 	RTE_SET_USED(graph);
 	RTE_BUILD_BUG_ON(sizeof(struct ip4_rewrite_node_ctx) > RTE_NODE_CTX_SZ);

-	if (!init_once) {
-		node_mbuf_priv1_dynfield_offset = rte_mbuf_dynfield_register(
-				&node_mbuf_priv1_dynfield_desc);
-		if (node_mbuf_priv1_dynfield_offset < 0)
-			return -rte_errno;
-		init_once = true;
-	}
-	IP4_REWRITE_NODE_PRIV1_OFF(node->ctx) = node_mbuf_priv1_dynfield_offset;
+	dyn = rte_node_mbuf_dynfield_register();
+	if (dyn < 0)
+		return -rte_errno;
+
+	IP4_REWRITE_NODE_PRIV1_OFF(node->ctx) = dyn;

 	node_dbg("ip4_rewrite", "Initialized ip4_rewrite node initialized");

diff --git a/lib/node/ip6_lookup.c b/lib/node/ip6_lookup.c
index f378d2d064..c140aa9cf3 100644
--- a/lib/node/ip6_lookup.c
+++ b/lib/node/ip6_lookup.c
@@ -316,18 +316,16 @@ ip6_lookup_node_init(const struct rte_graph *graph, struct rte_node *node)
 {
 	uint16_t socket, lcore_id;
 	static uint8_t init_once;
-	int rc;
+	int rc, dyn;

 	RTE_SET_USED(graph);
 	RTE_BUILD_BUG_ON(sizeof(struct ip6_lookup_node_ctx) > RTE_NODE_CTX_SZ);

-	if (!init_once) {
-		node_mbuf_priv1_dynfield_offset =
-			rte_mbuf_dynfield_register(
-				&node_mbuf_priv1_dynfield_desc);
-		if (node_mbuf_priv1_dynfield_offset < 0)
-			return -rte_errno;
+	dyn = rte_node_mbuf_dynfield_register();
+	if (dyn < 0)
+		return -rte_errno;

+	if (!init_once) {
 		/* Setup LPM tables for all sockets */
 		RTE_LCORE_FOREACH(lcore_id)
 		{
@@ -345,8 +343,7 @@ ip6_lookup_node_init(const struct rte_graph *graph, struct rte_node *node)

 	/* Update socket's LPM and mbuf dyn priv1 offset in node ctx */
 	IP6_LOOKUP_NODE_LPM(node->ctx) = ip6_lookup_nm.lpm_tbl[graph->socket];
-	IP6_LOOKUP_NODE_PRIV1_OFF(node->ctx) =
-					node_mbuf_priv1_dynfield_offset;
+	IP6_LOOKUP_NODE_PRIV1_OFF(node->ctx) = dyn;

 	node_dbg("ip6_lookup", "Initialized ip6_lookup node");

diff --git a/lib/node/ip6_rewrite.c b/lib/node/ip6_rewrite.c
index 198d8d8820..b9e223ab3a 100644
--- a/lib/node/ip6_rewrite.c
+++ b/lib/node/ip6_rewrite.c
@@ -242,19 +242,15 @@ ip6_rewrite_node_process(struct rte_graph *graph, struct rte_node *node,
 static int
 ip6_rewrite_node_init(const struct rte_graph *graph, struct rte_node *node)
 {
-	static bool init_once;
+	int dyn;

 	RTE_SET_USED(graph);
 	RTE_BUILD_BUG_ON(sizeof(struct ip6_rewrite_node_ctx) > RTE_NODE_CTX_SZ);

-	if (!init_once) {
-		node_mbuf_priv1_dynfield_offset = rte_mbuf_dynfield_register(
-				&node_mbuf_priv1_dynfield_desc);
-		if (node_mbuf_priv1_dynfield_offset < 0)
-			return -rte_errno;
-		init_once = true;
-	}
-	IP6_REWRITE_NODE_PRIV1_OFF(node->ctx) = node_mbuf_priv1_dynfield_offset;
+	dyn = rte_node_mbuf_dynfield_register();
+	if (dyn < 0)
+		return -rte_errno;
+	IP6_REWRITE_NODE_PRIV1_OFF(node->ctx) = dyn;

 	node_dbg("ip6_rewrite", "Initialized ip6_rewrite node");

diff --git a/lib/node/node_private.h b/lib/node/node_private.h
index 4fafab19be..7fb2aff0b8 100644
--- a/lib/node/node_private.h
+++ b/lib/node/node_private.h
@@ -13,6 +13,7 @@
 #include <rte_mbuf_dyn.h>

 #include <rte_graph_worker_common.h>
+#include <rte_node_mbuf_dynfield.h>

 extern int rte_node_logtype;
 #define RTE_LOGTYPE_NODE rte_node_logtype
@@ -26,28 +27,8 @@ extern int rte_node_logtype;
 #define node_info(node_name, ...) NODE_LOG(INFO, node_name, __VA_ARGS__)
 #define node_dbg(node_name, ...) NODE_LOG(DEBUG, node_name, __VA_ARGS__)

-/**
- * Node mbuf private data to store next hop, ttl and checksum.
- */
-struct node_mbuf_priv1 {
-	union {
-		/* IP4/IP6 rewrite */
-		struct {
-			uint16_t nh;
-			uint16_t ttl;
-			uint32_t cksum;
-		};
-
-		uint64_t u;
-	};
-};
-
-static const struct rte_mbuf_dynfield node_mbuf_priv1_dynfield_desc = {
-	.name = "rte_node_dynfield_priv1",
-	.size = sizeof(struct node_mbuf_priv1),
-	.align = alignof(struct node_mbuf_priv1),
-};
-extern int node_mbuf_priv1_dynfield_offset;
+/* define internal function used by nodes */
+#define node_mbuf_priv1 rte_node_mbuf_overload_fields_get

 /**
  * Node mbuf private area 2.
@@ -60,21 +41,6 @@ struct __rte_cache_aligned node_mbuf_priv2 {

 #define OBJS_PER_CLINE (RTE_CACHE_LINE_SIZE / sizeof(void *))

-/**
- * Get mbuf_priv1 pointer from rte_mbuf.
- *
- * @param
- *   Pointer to the rte_mbuf.
- *
- * @return
- *   Pointer to the mbuf_priv1.
- */
-static __rte_always_inline struct node_mbuf_priv1 *
-node_mbuf_priv1(struct rte_mbuf *m, const int offset)
-{
-	return RTE_MBUF_DYNFIELD(m, offset, struct node_mbuf_priv1 *);
-}
-
 /**
  * Get mbuf_priv2 pointer from rte_mbuf.
  *
diff --git a/lib/node/rte_node_mbuf_dynfield.h b/lib/node/rte_node_mbuf_dynfield.h
index 91eec33a56..a69661f41b 100644
--- a/lib/node/rte_node_mbuf_dynfield.h
+++ b/lib/node/rte_node_mbuf_dynfield.h
@@ -34,6 +34,15 @@ extern "C" {
  */
 typedef struct rte_node_mbuf_overload_fields {
 	union {
+		/* Following fields used by ip[4|6]-lookup -> ip[4|6]-rewrite nodes */
+		union {
+			struct {
+				uint16_t nh;
+				uint16_t ttl;
+				uint32_t cksum;
+			};
+			uint64_t u;
+		};
 		uint8_t data[RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE];
 	};
 } rte_node_mbuf_overload_fields_t;
--
2.43.0