From: Olivier Matz <olivier.matz@6wind.com>
Date: Wed, 18 Sep 2019 16:28:12 +0000 (+0200)
Subject: mbuf: add timestamp dynamic field and flag (example)
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=refs%2Fheads%2Fdyn-mbuf1;p=dpdk.git

mbuf: add timestamp dynamic field and flag (example)

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
---

diff --git a/lib/librte_mbuf/rte_mbuf_dyn.c b/lib/librte_mbuf/rte_mbuf_dyn.c
index 13b8742d03..6398ceb584 100644
--- a/lib/librte_mbuf/rte_mbuf_dyn.c
+++ b/lib/librte_mbuf/rte_mbuf_dyn.c
@@ -406,3 +406,33 @@ fail:
 	rte_free(te);
 	return -1;
 }
+
+const struct rte_mbuf_dynfield rte_mbuf_dynfield_timestamp = {
+	.name = "rte_mbuf_dynfield_timestamp",
+	.size = sizeof(uint64_t),
+	.align = __alignof__(uint64_t),
+	.flags = 0,
+};
+int rte_mbuf_dynfield_timestamp_offset = -1;
+
+const struct rte_mbuf_dynflag rte_mbuf_dynflag_timestamp = {
+	.name = "rte_mbuf_dynflag_timestamp",
+	.flags = 0,
+};
+int rte_mbuf_dynflag_timestamp_bitnum = -1;
+
+__rte_experimental
+int rte_mbuf_dyn_timestamp_register(void)
+{
+	rte_mbuf_dynfield_timestamp_offset = rte_mbuf_dynfield_register(
+		&rte_mbuf_dynfield_timestamp);
+	if (rte_mbuf_dynfield_timestamp_offset < 0)
+		return -1;
+
+	rte_mbuf_dynflag_timestamp_bitnum = rte_mbuf_dynflag_register(
+		&rte_mbuf_dynflag_timestamp);
+	if (rte_mbuf_dynflag_timestamp_bitnum < 0)
+		return -1;
+
+	return 0;
+}
diff --git a/lib/librte_mbuf/rte_mbuf_dyn.h b/lib/librte_mbuf/rte_mbuf_dyn.h
index 6e2c81654a..35b03a6bdf 100644
--- a/lib/librte_mbuf/rte_mbuf_dyn.h
+++ b/lib/librte_mbuf/rte_mbuf_dyn.h
@@ -54,6 +54,9 @@
  */
 
 #include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+
 /**
  * Maximum length of the dynamic field or flag string.
  */
@@ -160,4 +163,70 @@ int rte_mbuf_dynflag_lookup(const char *name,
  */
 #define RTE_MBUF_DYNFIELD(m, offset, type) ((type)((uintptr_t)(m) + (offset)))
 
+/* Placeholder for dynamic fields and flags declarations. */
+extern const struct rte_mbuf_dynfield rte_mbuf_dynfield_timestamp;
+extern int rte_mbuf_dynfield_timestamp_offset;
+extern const struct rte_mbuf_dynflag rte_mbuf_dynflag_timestamp;
+extern int rte_mbuf_dynflag_timestamp_bitnum;
+
+/**
+ * Register timestamp dynamic field and flag.
+ *
+ * @return
+ *   0 on success, or -1 on error (rte_errno is set, see
+ *   rte_mbuf_dynfield_register() and rte_mbuf_dynflag_register()
+ *   for details).
+ */
+__rte_experimental
+int rte_mbuf_dyn_timestamp_register(void);
+
+/**
+ * Set timestamp dynamic field and flag in mbuf.
+ *
+ * rte_mbuf_dyn_timestamp_register() must have been called first.
+ */
+__rte_experimental
+static inline void rte_mbuf_dyn_timestamp_set(struct rte_mbuf *m,
+					uint64_t timestamp)
+{
+	*RTE_MBUF_DYNFIELD(m, rte_mbuf_dynfield_timestamp_offset,
+			uint64_t *) = timestamp;
+	m->ol_flags |= (1UL << rte_mbuf_dynflag_timestamp_bitnum);
+}
+
+/**
+ * Get timestamp dynamic field value in mbuf.
+ *
+ * rte_mbuf_dyn_timestamp_register() must have been called first.
+ */
+__rte_experimental
+static inline uint64_t rte_mbuf_dyn_timestamp_get(const struct rte_mbuf *m)
+{
+	return *RTE_MBUF_DYNFIELD(m, rte_mbuf_dynfield_timestamp_offset,
+				uint64_t *);
+}
+
+/**
+ * Delete the timestamp dynamic flag in mbuf.
+ *
+ * rte_mbuf_dyn_timestamp_register() must have been called first.
+ */
+__rte_experimental
+static inline void rte_mbuf_dyn_timestamp_del(struct rte_mbuf *m)
+{
+	m->ol_flags &= ~(1UL << rte_mbuf_dynflag_timestamp_bitnum);
+}
+
+/**
+ * Check timestamp dynamic flag value in mbuf.
+ *
+ * rte_mbuf_dyn_timestamp_register() must have been called first.
+ */
+__rte_experimental
+static inline bool rte_mbuf_dyn_timestamp_avail(const struct rte_mbuf *m)
+{
+	return m->ol_flags & (1UL << rte_mbuf_dynflag_timestamp_bitnum);
+}
+
+
 #endif
diff --git a/lib/librte_mbuf/rte_mbuf_version.map b/lib/librte_mbuf/rte_mbuf_version.map
index a98310570f..8e70842452 100644
--- a/lib/librte_mbuf/rte_mbuf_version.map
+++ b/lib/librte_mbuf/rte_mbuf_version.map
@@ -54,4 +54,5 @@ EXPERIMENTAL {
 	rte_mbuf_dynfield_register;
 	rte_mbuf_dynflag_lookup;
 	rte_mbuf_dynflag_register;
+	rte_mbuf_dyn_timestamp_register;
 } DPDK_18.08;