diff --git a/lib/core/librte_mbuf/Makefile b/lib/core/librte_mbuf/Makefile
new file mode 100644
index 0000000..9b45ba4
--- /dev/null
+++ b/lib/core/librte_mbuf/Makefile
@@ -0,0 +1,48 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_mbuf.a
+
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3
+
+# all source are stored in SRCS-y
+SRCS-$(CONFIG_RTE_LIBRTE_MBUF) := rte_mbuf.c
+
+# install includes
+SYMLINK-$(CONFIG_RTE_LIBRTE_MBUF)-include := rte_mbuf.h
+
+# this lib needs eal
+DEPDIRS-$(CONFIG_RTE_LIBRTE_MBUF) += lib/librte_eal lib/librte_mempool
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/core/librte_mbuf/rte_mbuf.c b/lib/core/librte_mbuf/rte_mbuf.c
new file mode 100644
index 0000000..1b14e02
--- /dev/null
+++ b/lib/core/librte_mbuf/rte_mbuf.c
@@ -0,0 +1,252 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright 2014 6WIND S.A.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <ctype.h>
+#include <sys/queue.h>
+
+#include <rte_debug.h>
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_string_fns.h>
+#include <rte_hexdump.h>
+
+/*
+ * ctrlmbuf constructor, given as a callback function to
+ * rte_mempool_create()
+ */
+void
+rte_ctrlmbuf_init(struct rte_mempool *mp,
+		__attribute__((unused)) void *opaque_arg,
+		void *_m,
+		__attribute__((unused)) unsigned i)
+{
+	struct rte_mbuf *m = _m;
+	rte_pktmbuf_init(mp, opaque_arg, _m, i);
+	m->ol_flags |= CTRL_MBUF_FLAG;
+}
+
+/*
+ * pktmbuf pool constructor, given as a callback function to
+ * rte_mempool_create()
+ */
+void
+rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg)
+{
+	struct rte_pktmbuf_pool_private *mbp_priv;
+	uint16_t roomsz;
+
+	mbp_priv = rte_mempool_get_priv(mp);
+	roomsz = (uint16_t)(uintptr_t)opaque_arg;
+
+	/* Use default data room size. */
+	if (0 == roomsz)
+		roomsz = 2048 + RTE_PKTMBUF_HEADROOM;
+
+	mbp_priv->mbuf_data_room_size = roomsz;
+}
+
+/*
+ * pktmbuf constructor, given as a callback function to
+ * rte_mempool_create().
+ * Set the fields of a packet mbuf to their default values.
+ */
+void
+rte_pktmbuf_init(struct rte_mempool *mp,
+		 __attribute__((unused)) void *opaque_arg,
+		 void *_m,
+		 __attribute__((unused)) unsigned i)
+{
+	struct rte_mbuf *m = _m;
+	uint32_t buf_len = mp->elt_size - sizeof(struct rte_mbuf);
+
+	RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf));
+
+	memset(m, 0, mp->elt_size);
+
+	/* start of buffer is just after mbuf structure */
+	m->buf_addr = (char *)m + sizeof(struct rte_mbuf);
+	m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
+			sizeof(struct rte_mbuf);
+	m->buf_len = (uint16_t)buf_len;
+
+	/* keep some headroom between start of buffer and data */
+	m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM, (uint16_t)m->buf_len);
+
+	/* init some constant fields */
+	m->pool = mp;
+	m->nb_segs = 1;
+	m->port = 0xff;
+}
+
+/* do some sanity checks on a mbuf: panic if it fails */
+void
+rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
+{
+	const struct rte_mbuf *m_seg;
+	unsigned nb_segs;
+
+	if (m == NULL)
+		rte_panic("mbuf is NULL\n");
+
+	/* generic checks */
+	if (m->pool == NULL)
+		rte_panic("bad mbuf pool\n");
+	if (m->buf_physaddr == 0)
+		rte_panic("bad phys addr\n");
+	if (m->buf_addr == NULL)
+		rte_panic("bad virt addr\n");
+
+#ifdef RTE_MBUF_REFCNT
+	uint16_t cnt = rte_mbuf_refcnt_read(m);
+	if ((cnt == 0) || (cnt == UINT16_MAX))
+		rte_panic("bad ref cnt\n");
+#endif
+
+	/* nothing to check for sub-segments */
+	if (is_header == 0)
+		return;
+
+	nb_segs = m->nb_segs;
+	m_seg = m;
+	while (m_seg && nb_segs != 0) {
+		m_seg = m_seg->next;
+		nb_segs--;
+	}
+	if (nb_segs != 0)
+		rte_panic("bad nb_segs\n");
+}
+
+/* dump a mbuf on console */
+void
+rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len)
+{
+	unsigned int len;
+	unsigned nb_segs;
+
+	__rte_mbuf_sanity_check(m, 1);
+
+	fprintf(f, "dump mbuf at 0x%p, phys=%"PRIx64", buf_len=%u\n",
+	       m, (uint64_t)m->buf_physaddr, (unsigned)m->buf_len);
+	fprintf(f, "  pkt_len=%"PRIu32", ol_flags=%"PRIx64", nb_segs=%u, "
+	       "in_port=%u\n", m->pkt_len, m->ol_flags,
+	       (unsigned)m->nb_segs, (unsigned)m->port);
+	nb_segs = m->nb_segs;
+
+	while (m && nb_segs != 0) {
+		__rte_mbuf_sanity_check(m, 0);
+
+		fprintf(f, "  segment at 0x%p, data=0x%p, data_len=%u\n",
+			m, rte_pktmbuf_mtod(m, void *), (unsigned)m->data_len);
+		len = dump_len;
+		if (len > m->data_len)
+			len = m->data_len;
+		if (len != 0)
+			rte_hexdump(f, NULL, rte_pktmbuf_mtod(m, void *), len);
+		dump_len -= len;
+		m = m->next;
+		nb_segs --;
+	}
+}
+
+/*
+ * Get the name of a RX offload flag. Must be kept synchronized with flag
+ * definitions in rte_mbuf.h.
+ */
+const char *rte_get_rx_ol_flag_name(uint64_t mask)
+{
+	switch (mask) {
+	case PKT_RX_VLAN_PKT: return "PKT_RX_VLAN_PKT";
+	case PKT_RX_RSS_HASH: return "PKT_RX_RSS_HASH";
+	case PKT_RX_FDIR: return "PKT_RX_FDIR";
+	case PKT_RX_L4_CKSUM_BAD: return "PKT_RX_L4_CKSUM_BAD";
+	case PKT_RX_IP_CKSUM_BAD: return "PKT_RX_IP_CKSUM_BAD";
+	/* case PKT_RX_EIP_CKSUM_BAD: return "PKT_RX_EIP_CKSUM_BAD"; */
+	/* case PKT_RX_OVERSIZE: return "PKT_RX_OVERSIZE"; */
+	/* case PKT_RX_HBUF_OVERFLOW: return "PKT_RX_HBUF_OVERFLOW"; */
+	/* case PKT_RX_RECIP_ERR: return "PKT_RX_RECIP_ERR"; */
+	/* case PKT_RX_MAC_ERR: return "PKT_RX_MAC_ERR"; */
+	case PKT_RX_IPV4_HDR: return "PKT_RX_IPV4_HDR";
+	case PKT_RX_IPV4_HDR_EXT: return "PKT_RX_IPV4_HDR_EXT";
+	case PKT_RX_IPV6_HDR: return "PKT_RX_IPV6_HDR";
+	case PKT_RX_IPV6_HDR_EXT: return "PKT_RX_IPV6_HDR_EXT";
+	case PKT_RX_IEEE1588_PTP: return "PKT_RX_IEEE1588_PTP";
+	case PKT_RX_IEEE1588_TMST: return "PKT_RX_IEEE1588_TMST";
+	case PKT_RX_TUNNEL_IPV4_HDR: return "PKT_RX_TUNNEL_IPV4_HDR";
+	case PKT_RX_TUNNEL_IPV6_HDR: return "PKT_RX_TUNNEL_IPV6_HDR";
+	default: return NULL;
+	}
+}
+
+/*
+ * Get the name of a TX offload flag. Must be kept synchronized with flag
+ * definitions in rte_mbuf.h.
+ */
+const char *rte_get_tx_ol_flag_name(uint64_t mask)
+{
+	switch (mask) {
+	case PKT_TX_VLAN_PKT: return "PKT_TX_VLAN_PKT";
+	case PKT_TX_IP_CKSUM: return "PKT_TX_IP_CKSUM";
+	case PKT_TX_TCP_CKSUM: return "PKT_TX_TCP_CKSUM";
+	case PKT_TX_SCTP_CKSUM: return "PKT_TX_SCTP_CKSUM";
+	case PKT_TX_UDP_CKSUM: return "PKT_TX_UDP_CKSUM";
+	case PKT_TX_IEEE1588_TMST: return "PKT_TX_IEEE1588_TMST";
+	case PKT_TX_UDP_TUNNEL_PKT: return "PKT_TX_UDP_TUNNEL_PKT";
+	case PKT_TX_TCP_SEG: return "PKT_TX_TCP_SEG";
+	case PKT_TX_IPV4: return "PKT_TX_IPV4";
+	case PKT_TX_IPV6: return "PKT_TX_IPV6";
+	case PKT_TX_OUTER_IP_CKSUM: return "PKT_TX_OUTER_IP_CKSUM";
+	case PKT_TX_OUTER_IPV4: return "PKT_TX_OUTER_IPV4";
+	case PKT_TX_OUTER_IPV6: return "PKT_TX_OUTER_IPV6";
+	default: return NULL;
+	}
+}
diff --git a/lib/core/librte_mbuf/rte_mbuf.h b/lib/core/librte_mbuf/rte_mbuf.h
new file mode 100644
index 0000000..16059c6
--- /dev/null
+++ b/lib/core/librte_mbuf/rte_mbuf.h
@@ -0,0 +1,1133 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright 2014 6WIND S.A.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_MBUF_H_
+#define _RTE_MBUF_H_
+
+/**
+ * @file
+ * RTE Mbuf
+ *
+ * The mbuf library provides the ability to create and destroy buffers
+ * that may be used by the RTE application to store message
+ * buffers. The message buffers are stored in a mempool, using the
+ * RTE mempool library.
+ *
+ * This library provide an API to allocate/free packet mbufs, which are
+ * used to carry network packets.
+ *
+ * To understand the concepts of packet buffers or mbufs, you
+ * should read "TCP/IP Illustrated, Volume 2: The Implementation,
+ * Addison-Wesley, 1995, ISBN 0-201-63354-X from Richard Stevens"
+ * http://www.kohala.com/start/tcpipiv2.html
+ */
+
+#include <stdint.h>
+#include <rte_mempool.h>
+#include <rte_memory.h>
+#include <rte_atomic.h>
+#include <rte_prefetch.h>
+#include <rte_branch_prediction.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* deprecated feature, renamed in RTE_MBUF_REFCNT */
+#pragma GCC poison RTE_MBUF_SCATTER_GATHER
+
+/*
+ * Packet Offload Features Flags. It also carry packet type information.
+ * Critical resources. Both rx/tx shared these bits. Be cautious on any change
+ *
+ * - RX flags start at bit position zero, and get added to the left of previous
+ *   flags.
+ * - The most-significant 8 bits are reserved for generic mbuf flags
+ * - TX flags therefore start at bit position 55 (i.e. 63-8), and new flags get
+ *   added to the right of the previously defined flags
+ *
+ * Keep these flags synchronized with rte_get_rx_ol_flag_name() and
+ * rte_get_tx_ol_flag_name().
+ */
+#define PKT_RX_VLAN_PKT      (1ULL << 0)  /**< RX packet is a 802.1q VLAN packet. */
+#define PKT_RX_RSS_HASH      (1ULL << 1)  /**< RX packet with RSS hash result. */
+#define PKT_RX_FDIR          (1ULL << 2)  /**< RX packet with FDIR match indicate. */
+#define PKT_RX_L4_CKSUM_BAD  (1ULL << 3)  /**< L4 cksum of RX pkt. is not OK. */
+#define PKT_RX_IP_CKSUM_BAD  (1ULL << 4)  /**< IP cksum of RX pkt. is not OK. */
+#define PKT_RX_EIP_CKSUM_BAD (0ULL << 0)  /**< External IP header checksum error. */
+#define PKT_RX_OVERSIZE      (0ULL << 0)  /**< Num of desc of an RX pkt oversize. */
+#define PKT_RX_HBUF_OVERFLOW (0ULL << 0)  /**< Header buffer overflow. */
+#define PKT_RX_RECIP_ERR     (0ULL << 0)  /**< Hardware processing error. */
+#define PKT_RX_MAC_ERR       (0ULL << 0)  /**< MAC error. */
+#define PKT_RX_IPV4_HDR      (1ULL << 5)  /**< RX packet with IPv4 header. */
+#define PKT_RX_IPV4_HDR_EXT  (1ULL << 6)  /**< RX packet with extended IPv4 header. */
+#define PKT_RX_IPV6_HDR      (1ULL << 7)  /**< RX packet with IPv6 header. */
+#define PKT_RX_IPV6_HDR_EXT  (1ULL << 8)  /**< RX packet with extended IPv6 header. */
+#define PKT_RX_IEEE1588_PTP  (1ULL << 9)  /**< RX IEEE1588 L2 Ethernet PT Packet. */
+#define PKT_RX_IEEE1588_TMST (1ULL << 10) /**< RX IEEE1588 L2/L4 timestamped packet.*/
+#define PKT_RX_TUNNEL_IPV4_HDR (1ULL << 11) /**< RX tunnel packet with IPv4 header.*/
+#define PKT_RX_TUNNEL_IPV6_HDR (1ULL << 12) /**< RX tunnel packet with IPv6 header. */
+#define PKT_RX_FDIR_ID       (1ULL << 13) /**< FD id reported if FDIR match. */
+#define PKT_RX_FDIR_FLX      (1ULL << 14) /**< Flexible bytes reported if FDIR match. */
+/* add new RX flags here */
+
+/* add new TX flags here */
+
+/**
+ * TCP segmentation offload. To enable this offload feature for a
+ * packet to be transmitted on hardware supporting TSO:
+ *  - set the PKT_TX_TCP_SEG flag in mbuf->ol_flags (this flag implies
+ *    PKT_TX_TCP_CKSUM)
+ *  - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
+ *  - if it's IPv4, set the PKT_TX_IP_CKSUM flag and write the IP checksum
+ *    to 0 in the packet
+ *  - fill the mbuf offload information: l2_len, l3_len, l4_len, tso_segsz
+ *  - calculate the pseudo header checksum without taking ip_len in account,
+ *    and set it in the TCP header. Refer to rte_ipv4_phdr_cksum() and
+ *    rte_ipv6_phdr_cksum() that can be used as helpers.
+ */
+#define PKT_TX_TCP_SEG       (1ULL << 49)
+
+/** TX packet is an UDP tunneled packet. It must be specified when using
+ *  outer checksum offload (PKT_TX_OUTER_IP_CKSUM) */
+#define PKT_TX_UDP_TUNNEL_PKT (1ULL << 50) /**< TX packet is an UDP tunneled packet */
+#define PKT_TX_IEEE1588_TMST (1ULL << 51) /**< TX IEEE1588 packet to timestamp. */
+
+/**
+ * Bits 52+53 used for L4 packet type with checksum enabled: 00: Reserved,
+ * 01: TCP checksum, 10: SCTP checksum, 11: UDP checksum. To use hardware
+ * L4 checksum offload, the user needs to:
+ *  - fill l2_len and l3_len in mbuf
+ *  - set the flags PKT_TX_TCP_CKSUM, PKT_TX_SCTP_CKSUM or PKT_TX_UDP_CKSUM
+ *  - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
+ *  - calculate the pseudo header checksum and set it in the L4 header (only
+ *    for TCP or UDP). See rte_ipv4_phdr_cksum() and rte_ipv6_phdr_cksum().
+ *    For SCTP, set the crc field to 0.
+ */
+#define PKT_TX_L4_NO_CKSUM   (0ULL << 52) /**< Disable L4 cksum of TX pkt. */
+#define PKT_TX_TCP_CKSUM     (1ULL << 52) /**< TCP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_SCTP_CKSUM    (2ULL << 52) /**< SCTP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_UDP_CKSUM     (3ULL << 52) /**< UDP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_L4_MASK       (3ULL << 52) /**< Mask for L4 cksum offload request. */
+
+#define PKT_TX_IP_CKSUM      (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_IPV4_CSUM     PKT_TX_IP_CKSUM /**< Alias of PKT_TX_IP_CKSUM. */
+
+/** Packet is IPv4 without requiring IP checksum offload. */
+#define PKT_TX_IPV4          (1ULL << 55)
+
+/** Tell the NIC it's an IPv6 packet.*/
+#define PKT_TX_IPV6          (1ULL << 56)
+
+#define PKT_TX_VLAN_PKT      (1ULL << 57) /**< TX packet is a 802.1q VLAN packet. */
+
+/** Outer IP checksum of TX packet, computed by NIC for tunneling packet.
+ *  The tunnel type must also be specified, ex: PKT_TX_UDP_TUNNEL_PKT. */
+#define PKT_TX_OUTER_IP_CKSUM   (1ULL << 58)
+
+/** Packet is outer IPv4 without requiring IP checksum offload for tunneling packet. */
+#define PKT_TX_OUTER_IPV4   (1ULL << 59)
+
+/** Tell the NIC it's an outer IPv6 packet for tunneling packet */
+#define PKT_TX_OUTER_IPV6    (1ULL << 60)
+
+/* Use final bit of flags to indicate a control mbuf */
+#define CTRL_MBUF_FLAG       (1ULL << 63) /**< Mbuf contains control data */
+
+/**
+ * Get the name of a RX offload flag
+ *
+ * @param mask
+ *   The mask describing the flag.
+ * @return
+ *   The name of this flag, or NULL if it's not a valid RX flag.
+ */
+const char *rte_get_rx_ol_flag_name(uint64_t mask);
+
+/**
+ * Get the name of a TX offload flag
+ *
+ * @param mask
+ *   The mask describing the flag. Usually only one bit must be set.
+ *   Several bits can be given if they belong to the same mask.
+ *   Ex: PKT_TX_L4_MASK.
+ * @return
+ *   The name of this flag, or NULL if it's not a valid TX flag.
+ */
+const char *rte_get_tx_ol_flag_name(uint64_t mask);
+
+/* define a set of marker types that can be used to refer to set points in the
+ * mbuf */
+typedef void    *MARKER[0];   /**< generic marker for a point in a structure */
+typedef uint8_t  MARKER8[0];  /**< generic marker with 1B alignment */
+typedef uint64_t MARKER64[0]; /**< marker that allows us to overwrite 8 bytes
+                               * with a single assignment */
+
+/**
+ * The generic rte_mbuf, containing a packet mbuf.
+ */
+struct rte_mbuf {
+	MARKER cacheline0;
+
+	void *buf_addr;           /**< Virtual address of segment buffer. */
+	phys_addr_t buf_physaddr; /**< Physical address of segment buffer. */
+
+	uint16_t buf_len;         /**< Length of segment buffer. */
+
+	/* next 6 bytes are initialised on RX descriptor rearm */
+	MARKER8 rearm_data;
+	uint16_t data_off;
+
+	/**
+	 * 16-bit Reference counter.
+	 * It should only be accessed using the following functions:
+	 * rte_mbuf_refcnt_update(), rte_mbuf_refcnt_read(), and
+	 * rte_mbuf_refcnt_set(). The functionality of these functions (atomic,
+	 * or non-atomic) is controlled by the CONFIG_RTE_MBUF_REFCNT_ATOMIC
+	 * config option.
+	 */
+	union {
+#ifdef RTE_MBUF_REFCNT
+		rte_atomic16_t refcnt_atomic; /**< Atomically accessed refcnt */
+		uint16_t refcnt;              /**< Non-atomically accessed refcnt */
+#endif
+		uint16_t refcnt_reserved;     /**< Do not use this field */
+	};
+	uint8_t nb_segs;          /**< Number of segments. */
+	uint8_t port;             /**< Input port. */
+
+	uint64_t ol_flags;        /**< Offload features. */
+
+	/* remaining bytes are set on RX when pulling packet from descriptor */
+	MARKER rx_descriptor_fields1;
+
+	/**
+	 * The packet type, which is used to indicate ordinary packet and also
+	 * tunneled packet format, i.e. each number is represented a type of
+	 * packet.
+	 */
+	uint16_t packet_type;
+
+	uint16_t data_len;        /**< Amount of data in segment buffer. */
+	uint32_t pkt_len;         /**< Total pkt len: sum of all segments. */
+	uint16_t vlan_tci;        /**< VLAN Tag Control Identifier (CPU order) */
+	uint16_t reserved;
+	union {
+		uint32_t rss;     /**< RSS hash result if RSS enabled */
+		struct {
+			union {
+				struct {
+					uint16_t hash;
+					uint16_t id;
+				};
+				uint32_t lo;
+				/**< Second 4 flexible bytes */
+			};
+			uint32_t hi;
+			/**< First 4 flexible bytes or FD ID, dependent on
+			     PKT_RX_FDIR_* flag in ol_flags. */
+		} fdir;           /**< Filter identifier if FDIR enabled */
+		uint32_t sched;   /**< Hierarchical scheduler */
+		uint32_t usr;	  /**< User defined tags. See @rte_distributor_process */
+	} hash;                   /**< hash information */
+
+	/* second cache line - fields only used in slow path or on TX */
+	MARKER cacheline1 __rte_cache_aligned;
+
+	union {
+		void *userdata;   /**< Can be used for external metadata */
+		uint64_t udata64; /**< Allow 8-byte userdata on 32-bit */
+	};
+
+	struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */
+	struct rte_mbuf *next;    /**< Next segment of scattered packet. */
+
+	/* fields to support TX offloads */
+	union {
+		uint64_t tx_offload;       /**< combined for easy fetch */
+		struct {
+			uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
+			uint64_t l3_len:9; /**< L3 (IP) Header Length. */
+			uint64_t l4_len:8; /**< L4 (TCP/UDP) Header Length. */
+			uint64_t tso_segsz:16; /**< TCP TSO segment size */
+
+			/* fields for TX offloading of tunnels */
+			uint64_t outer_l3_len:9; /**< Outer L3 (IP) Hdr Length. */
+			uint64_t outer_l2_len:7; /**< Outer L2 (MAC) Hdr Length. */
+
+			/* uint64_t unused:8; */
+		};
+	};
+} __rte_cache_aligned;
+
+/**
+ * Given the buf_addr returns the pointer to corresponding mbuf.
+ */
+#define RTE_MBUF_FROM_BADDR(ba)     (((struct rte_mbuf *)(ba)) - 1)
+
+/**
+ * Given the pointer to mbuf returns an address where it's  buf_addr
+ * should point to.
+ */
+#define RTE_MBUF_TO_BADDR(mb)       (((struct rte_mbuf *)(mb)) + 1)
+
+/**
+ * Returns TRUE if given mbuf is indirect, or FALSE otherwise.
+ */
+#define RTE_MBUF_INDIRECT(mb)   (RTE_MBUF_FROM_BADDR((mb)->buf_addr) != (mb))
+
+/**
+ * Returns TRUE if given mbuf is direct, or FALSE otherwise.
+ */
+#define RTE_MBUF_DIRECT(mb)     (RTE_MBUF_FROM_BADDR((mb)->buf_addr) == (mb))
+
+
+/**
+ * Private data in case of pktmbuf pool.
+ *
+ * A structure that contains some pktmbuf_pool-specific data that are
+ * appended after the mempool structure (in private data).
+ */
+struct rte_pktmbuf_pool_private {
+	uint16_t mbuf_data_room_size; /**< Size of data space in each mbuf.*/
+};
+
+#ifdef RTE_LIBRTE_MBUF_DEBUG
+
+/**  check mbuf type in debug mode */
+#define __rte_mbuf_sanity_check(m, is_h) rte_mbuf_sanity_check(m, is_h)
+
+/**  check mbuf type in debug mode if mbuf pointer is not null */
+#define __rte_mbuf_sanity_check_raw(m, is_h)	do {       \
+	if ((m) != NULL)                                   \
+		rte_mbuf_sanity_check(m, is_h);          \
+} while (0)
+
+/**  MBUF asserts in debug mode */
+#define RTE_MBUF_ASSERT(exp)                                         \
+if (!(exp)) {                                                        \
+	rte_panic("line%d\tassert \"" #exp "\" failed\n", __LINE__); \
+}
+
+#else /*  RTE_LIBRTE_MBUF_DEBUG */
+
+/**  check mbuf type in debug mode */
+#define __rte_mbuf_sanity_check(m, is_h) do { } while (0)
+
+/**  check mbuf type in debug mode if mbuf pointer is not null */
+#define __rte_mbuf_sanity_check_raw(m, is_h) do { } while (0)
+
+/**  MBUF asserts in debug mode */
+#define RTE_MBUF_ASSERT(exp)                do { } while (0)
+
+#endif /*  RTE_LIBRTE_MBUF_DEBUG */
+
+#ifdef RTE_MBUF_REFCNT
+#ifdef RTE_MBUF_REFCNT_ATOMIC
+
+/**
+ * Adds given value to an mbuf's refcnt and returns its new value.
+ * @param m
+ *   Mbuf to update
+ * @param value
+ *   Value to add/subtract
+ * @return
+ *   Updated value
+ */
+static inline uint16_t
+rte_mbuf_refcnt_update(struct rte_mbuf *m, int16_t value)
+{
+	return (uint16_t)(rte_atomic16_add_return(&m->refcnt_atomic, value));
+}
+
+/**
+ * Reads the value of an mbuf's refcnt.
+ * @param m
+ *   Mbuf to read
+ * @return
+ *   Reference count number.
+ */
+static inline uint16_t
+rte_mbuf_refcnt_read(const struct rte_mbuf *m)
+{
+	return (uint16_t)(rte_atomic16_read(&m->refcnt_atomic));
+}
+
+/**
+ * Sets an mbuf's refcnt to a defined value.
+ * @param m
+ *   Mbuf to update
+ * @param new_value
+ *   Value set
+ */
+static inline void
+rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
+{
+	rte_atomic16_set(&m->refcnt_atomic, new_value);
+}
+
+#else /* ! RTE_MBUF_REFCNT_ATOMIC */
+
+/**
+ * Adds given value to an mbuf's refcnt and returns its new value.
+ */
+static inline uint16_t
+rte_mbuf_refcnt_update(struct rte_mbuf *m, int16_t value)
+{
+	m->refcnt = (uint16_t)(m->refcnt + value);
+	return m->refcnt;
+}
+
+/**
+ * Reads the value of an mbuf's refcnt.
+ */
+static inline uint16_t
+rte_mbuf_refcnt_read(const struct rte_mbuf *m)
+{
+	return m->refcnt;
+}
+
+/**
+ * Sets an mbuf's refcnt to the defined value.
+ */
+static inline void
+rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
+{
+	m->refcnt = new_value;
+}
+
+#endif /* RTE_MBUF_REFCNT_ATOMIC */
+
+/** Mbuf prefetch */
+#define RTE_MBUF_PREFETCH_TO_FREE(m) do {       \
+	if ((m) != NULL)                        \
+		rte_prefetch0(m);               \
+} while (0)
+
+#else /* ! RTE_MBUF_REFCNT */
+
+/** Mbuf prefetch */
+#define RTE_MBUF_PREFETCH_TO_FREE(m) do { } while(0)
+
+#define rte_mbuf_refcnt_set(m,v) do { } while(0)
+
+#endif /* RTE_MBUF_REFCNT */
+
+
+/**
+ * Sanity checks on an mbuf.
+ *
+ * Check the consistency of the given mbuf. The function will cause a
+ * panic if corruption is detected.
+ *
+ * @param m
+ *   The mbuf to be checked.
+ * @param is_header
+ *   True if the mbuf is a packet header, false if it is a sub-segment
+ *   of a packet (in this case, some fields like nb_segs are not checked)
+ */
+void
+rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header);
+
+/**
+ * @internal Allocate a new mbuf from mempool *mp*.
+ * The use of that function is reserved for RTE internal needs.
+ * Please use rte_pktmbuf_alloc().
+ *
+ * @param mp
+ *   The mempool from which mbuf is allocated.
+ * @return
+ *   - The pointer to the new mbuf on success.
+ *   - NULL if allocation failed.
+ */
+static inline struct rte_mbuf *__rte_mbuf_raw_alloc(struct rte_mempool *mp)
+{
+	struct rte_mbuf *m;
+	void *mb = NULL;
+	if (rte_mempool_get(mp, &mb) < 0)
+		return NULL;
+	m = (struct rte_mbuf *)mb;
+#ifdef RTE_MBUF_REFCNT
+	RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0);
+	rte_mbuf_refcnt_set(m, 1);
+#endif /* RTE_MBUF_REFCNT */
+	return (m);
+}
+
+/**
+ * @internal Put mbuf back into its original mempool.
+ * The use of that function is reserved for RTE internal needs.
+ * Please use rte_pktmbuf_free().
+ *
+ * @param m
+ *   The mbuf to be freed.
+ */
+static inline void __attribute__((always_inline))
+__rte_mbuf_raw_free(struct rte_mbuf *m)
+{
+#ifdef RTE_MBUF_REFCNT
+	RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0);
+#endif /* RTE_MBUF_REFCNT */
+	rte_mempool_put(m->pool, m);
+}
+
+/* Operations on ctrl mbuf */
+
+/**
+ * The control mbuf constructor.
+ *
+ * This function initializes some fields in an mbuf structure that are
+ * not modified by the user once created (mbuf type, origin pool, buffer
+ * start address, and so on). This function is given as a callback function
+ * to rte_mempool_create() at pool creation time.
+ *
+ * @param mp
+ *   The mempool from which the mbuf is allocated.
+ * @param opaque_arg
+ *   A pointer that can be used by the user to retrieve useful information
+ *   for mbuf initialization. This pointer comes from the ``init_arg``
+ *   parameter of rte_mempool_create().
+ * @param m
+ *   The mbuf to initialize.
+ * @param i
+ *   The index of the mbuf in the pool table.
+ */
+void rte_ctrlmbuf_init(struct rte_mempool *mp, void *opaque_arg,
+		void *m, unsigned i);
+
+/**
+ * Allocate a new mbuf (type is ctrl) from mempool *mp*.
+ *
+ * This new mbuf is initialized with data pointing to the beginning of
+ * buffer, and with a length of zero.
+ *
+ * @param mp
+ *   The mempool from which the mbuf is allocated.
+ * @return
+ *   - The pointer to the new mbuf on success.
+ *   - NULL if allocation failed.
+ */
+#define rte_ctrlmbuf_alloc(mp) rte_pktmbuf_alloc(mp)
+
+/**
+ * Free a control mbuf back into its original mempool.
+ *
+ * @param m
+ *   The control mbuf to be freed.
+ */
+#define rte_ctrlmbuf_free(m) rte_pktmbuf_free(m)
+
+/**
+ * A macro that returns the pointer to the carried data.
+ *
+ * The value that can be read or assigned.
+ *
+ * @param m
+ *   The control mbuf.
+ */
+#define rte_ctrlmbuf_data(m) ((char *)((m)->buf_addr) + (m)->data_off)
+
+/**
+ * A macro that returns the length of the carried data.
+ *
+ * The value that can be read or assigned.
+ *
+ * @param m
+ *   The control mbuf.
+ */
+#define rte_ctrlmbuf_len(m) rte_pktmbuf_data_len(m)
+
+/**
+ * Tests if an mbuf is a control mbuf
+ *
+ * @param m
+ *   The mbuf to be tested
+ * @return
+ *   - True (1) if the mbuf is a control mbuf
+ *   - False(0) otherwise
+ */
+static inline int
+rte_is_ctrlmbuf(struct rte_mbuf *m)
+{
+	return (!!(m->ol_flags & CTRL_MBUF_FLAG));
+}
+
+/* Operations on pkt mbuf */
+
+/**
+ * The packet mbuf constructor.
+ *
+ * This function initializes some fields in the mbuf structure that are
+ * not modified by the user once created (origin pool, buffer start
+ * address, and so on). This function is given as a callback function to
+ * rte_mempool_create() at pool creation time.
+ *
+ * @param mp
+ *   The mempool from which mbufs originate.
+ * @param opaque_arg
+ *   A pointer that can be used by the user to retrieve useful information
+ *   for mbuf initialization. This pointer comes from the ``init_arg``
+ *   parameter of rte_mempool_create().
+ * @param m
+ *   The mbuf to initialize.
+ * @param i
+ *   The index of the mbuf in the pool table.
+ */
+void rte_pktmbuf_init(struct rte_mempool *mp, void *opaque_arg,
+		      void *m, unsigned i);
+
+
+/**
+ * A  packet mbuf pool constructor.
+ *
+ * This function initializes the mempool private data in the case of a
+ * pktmbuf pool. This private data is needed by the driver. The
+ * function is given as a callback function to rte_mempool_create() at
+ * pool creation. It can be extended by the user, for example, to
+ * provide another packet size.
+ *
+ * @param mp
+ *   The mempool from which mbufs originate.
+ * @param opaque_arg
+ *   A pointer that can be used by the user to retrieve useful information
+ *   for mbuf initialization. This pointer comes from the ``init_arg``
+ *   parameter of rte_mempool_create().
+ */
+void rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg);
+
+/**
+ * Reset the fields of a packet mbuf to their default values.
+ *
+ * The given mbuf must have only one segment.
+ *
+ * @param m
+ *   The packet mbuf to be resetted.
+ */
+static inline void rte_pktmbuf_reset(struct rte_mbuf *m)
+{
+	m->next = NULL;
+	m->pkt_len = 0;
+	m->tx_offload = 0;
+	m->vlan_tci = 0;
+	m->nb_segs = 1;
+	m->port = 0xff;
+
+	m->ol_flags = 0;
+	m->packet_type = 0;
+	m->data_off = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ?
+			RTE_PKTMBUF_HEADROOM : m->buf_len;
+
+	m->data_len = 0;
+	__rte_mbuf_sanity_check(m, 1);
+}
+
+/**
+ * Allocate a new mbuf from a mempool.
+ *
+ * This new mbuf contains one segment, which has a length of 0. The pointer
+ * to data is initialized to have some bytes of headroom in the buffer
+ * (if buffer size allows).
+ *
+ * @param mp
+ *   The mempool from which the mbuf is allocated.
+ * @return
+ *   - The pointer to the new mbuf on success.
+ *   - NULL if allocation failed.
+ */
+static inline struct rte_mbuf *rte_pktmbuf_alloc(struct rte_mempool *mp)
+{
+	struct rte_mbuf *m;
+	if ((m = __rte_mbuf_raw_alloc(mp)) != NULL)
+		rte_pktmbuf_reset(m);
+	return (m);
+}
+
+#ifdef RTE_MBUF_REFCNT
+
+/**
+ * Attach packet mbuf to another packet mbuf.
+ * After attachment we refer the mbuf we attached as 'indirect',
+ * while mbuf we attached to as 'direct'.
+ * Right now, not supported:
+ *  - attachment to indirect mbuf (e.g. - md  has to be direct).
+ *  - attachment for already indirect mbuf (e.g. - mi has to be direct).
+ *  - mbuf we trying to attach (mi) is used by someone else
+ *    e.g. it's reference counter is greater then 1.
+ *
+ * @param mi
+ *   The indirect packet mbuf.
+ * @param md
+ *   The direct packet mbuf.
+ */
+
+static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *md)
+{
+	RTE_MBUF_ASSERT(RTE_MBUF_DIRECT(md) &&
+	    RTE_MBUF_DIRECT(mi) &&
+	    rte_mbuf_refcnt_read(mi) == 1);
+
+	rte_mbuf_refcnt_update(md, 1);
+	mi->buf_physaddr = md->buf_physaddr;
+	mi->buf_addr = md->buf_addr;
+	mi->buf_len = md->buf_len;
+
+	mi->next = md->next;
+	mi->data_off = md->data_off;
+	mi->data_len = md->data_len;
+	mi->port = md->port;
+	mi->vlan_tci = md->vlan_tci;
+	mi->tx_offload = md->tx_offload;
+	mi->hash = md->hash;
+
+	mi->next = NULL;
+	mi->pkt_len = mi->data_len;
+	mi->nb_segs = 1;
+	mi->ol_flags = md->ol_flags;
+	mi->packet_type = md->packet_type;
+
+	__rte_mbuf_sanity_check(mi, 1);
+	__rte_mbuf_sanity_check(md, 0);
+}
+
+/**
+ * Detach an indirect packet mbuf -
+ *  - restore original mbuf address and length values.
+ *  - reset pktmbuf data and data_len to their default values.
+ *  All other fields of the given packet mbuf will be left intact.
+ *
+ * @param m
+ *   The indirect attached packet mbuf.
+ */
+
+static inline void rte_pktmbuf_detach(struct rte_mbuf *m)
+{
+	const struct rte_mempool *mp = m->pool;
+	void *buf = RTE_MBUF_TO_BADDR(m);
+	uint32_t buf_len = mp->elt_size - sizeof(*m);
+	m->buf_physaddr = rte_mempool_virt2phy(mp, m) + sizeof (*m);
+
+	m->buf_addr = buf;
+	m->buf_len = (uint16_t)buf_len;
+
+	m->data_off = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ?
+			RTE_PKTMBUF_HEADROOM : m->buf_len;
+
+	m->data_len = 0;
+}
+
+#endif /* RTE_MBUF_REFCNT */
+
+
+static inline struct rte_mbuf* __attribute__((always_inline))
+__rte_pktmbuf_prefree_seg(struct rte_mbuf *m)
+{
+	__rte_mbuf_sanity_check(m, 0);
+
+#ifdef RTE_MBUF_REFCNT
+	if (likely (rte_mbuf_refcnt_read(m) == 1) ||
+			likely (rte_mbuf_refcnt_update(m, -1) == 0)) {
+		struct rte_mbuf *md = RTE_MBUF_FROM_BADDR(m->buf_addr);
+
+		rte_mbuf_refcnt_set(m, 0);
+
+		/* if this is an indirect mbuf, then
+		 *  - detach mbuf
+		 *  - free attached mbuf segment
+		 */
+		if (unlikely (md != m)) {
+			rte_pktmbuf_detach(m);
+			if (rte_mbuf_refcnt_update(md, -1) == 0)
+				__rte_mbuf_raw_free(md);
+		}
+#endif
+		return(m);
+#ifdef RTE_MBUF_REFCNT
+	}
+	return (NULL);
+#endif
+}
+
+/**
+ * Free a segment of a packet mbuf into its original mempool.
+ *
+ * Free an mbuf, without parsing other segments in case of chained
+ * buffers.
+ *
+ * @param m
+ *   The packet mbuf segment to be freed.
+ */
+static inline void __attribute__((always_inline))
+rte_pktmbuf_free_seg(struct rte_mbuf *m)
+{
+	if (likely(NULL != (m = __rte_pktmbuf_prefree_seg(m)))) {
+		m->next = NULL;
+		__rte_mbuf_raw_free(m);
+	}
+}
+
+/**
+ * Free a packet mbuf back into its original mempool.
+ *
+ * Free an mbuf, and all its segments in case of chained buffers. Each
+ * segment is added back into its original mempool.
+ *
+ * @param m
+ *   The packet mbuf to be freed.
+ */
+static inline void rte_pktmbuf_free(struct rte_mbuf *m)
+{
+	struct rte_mbuf *m_next;
+
+	__rte_mbuf_sanity_check(m, 1);
+
+	while (m != NULL) {
+		m_next = m->next;
+		rte_pktmbuf_free_seg(m);
+		m = m_next;
+	}
+}
+
+#ifdef RTE_MBUF_REFCNT
+
+/**
+ * Creates a "clone" of the given packet mbuf.
+ *
+ * Walks through all segments of the given packet mbuf, and for each of them:
+ *  - Creates a new packet mbuf from the given pool.
+ *  - Attaches newly created mbuf to the segment.
+ * Then updates pkt_len and nb_segs of the "clone" packet mbuf to match values
+ * from the original packet mbuf.
+ *
+ * @param md
+ *   The packet mbuf to be cloned.
+ * @param mp
+ *   The mempool from which the "clone" mbufs are allocated.
+ * @return
+ *   - The pointer to the new "clone" mbuf on success.
+ *   - NULL if allocation fails.
+ */
+static inline struct rte_mbuf *rte_pktmbuf_clone(struct rte_mbuf *md,
+		struct rte_mempool *mp)
+{
+	struct rte_mbuf *mc, *mi, **prev;
+	uint32_t pktlen;
+	uint8_t nseg;
+
+	if (unlikely ((mc = rte_pktmbuf_alloc(mp)) == NULL))
+		return (NULL);
+
+	mi = mc;
+	prev = &mi->next;
+	pktlen = md->pkt_len;
+	nseg = 0;
+
+	do {
+		nseg++;
+		rte_pktmbuf_attach(mi, md);
+		*prev = mi;
+		prev = &mi->next;
+	} while ((md = md->next) != NULL &&
+	    (mi = rte_pktmbuf_alloc(mp)) != NULL);
+
+	*prev = NULL;
+	mc->nb_segs = nseg;
+	mc->pkt_len = pktlen;
+
+	/* Allocation of new indirect segment failed */
+	if (unlikely (mi == NULL)) {
+		rte_pktmbuf_free(mc);
+		return (NULL);
+	}
+
+	__rte_mbuf_sanity_check(mc, 1);
+	return (mc);
+}
+
+/**
+ * Adds given value to the refcnt of all packet mbuf segments.
+ *
+ * Walks through all segments of given packet mbuf and for each of them
+ * invokes rte_mbuf_refcnt_update().
+ *
+ * @param m
+ *   The packet mbuf whose refcnt to be updated.
+ * @param v
+ *   The value to add to the mbuf's segments refcnt.
+ */
+static inline void rte_pktmbuf_refcnt_update(struct rte_mbuf *m, int16_t v)
+{
+	__rte_mbuf_sanity_check(m, 1);
+
+	do {
+		rte_mbuf_refcnt_update(m, v);
+	} while ((m = m->next) != NULL);
+}
+
+#endif /* RTE_MBUF_REFCNT */
+
+/**
+ * Get the headroom in a packet mbuf.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   The length of the headroom.
+ */
+static inline uint16_t rte_pktmbuf_headroom(const struct rte_mbuf *m)
+{
+	__rte_mbuf_sanity_check(m, 1);
+	return m->data_off;
+}
+
+/**
+ * Get the tailroom of a packet mbuf.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   The length of the tailroom.
+ */
+static inline uint16_t rte_pktmbuf_tailroom(const struct rte_mbuf *m)
+{
+	__rte_mbuf_sanity_check(m, 1);
+	return (uint16_t)(m->buf_len - rte_pktmbuf_headroom(m) -
+			  m->data_len);
+}
+
+/**
+ * Get the last segment of the packet.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   The last segment of the given mbuf.
+ */
+static inline struct rte_mbuf *rte_pktmbuf_lastseg(struct rte_mbuf *m)
+{
+	struct rte_mbuf *m2 = (struct rte_mbuf *)m;
+
+	__rte_mbuf_sanity_check(m, 1);
+	while (m2->next != NULL)
+		m2 = m2->next;
+	return m2;
+}
+
+/**
+ * A macro that points to the start of the data in the mbuf.
+ *
+ * The returned pointer is cast to type t. Before using this
+ * function, the user must ensure that m_headlen(m) is large enough to
+ * read its data.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @param t
+ *   The type to cast the result into.
+ */
+#define rte_pktmbuf_mtod(m, t) ((t)((char *)(m)->buf_addr + (m)->data_off))
+
+/**
+ * A macro that returns the length of the packet.
+ *
+ * The value can be read or assigned.
+ *
+ * @param m
+ *   The packet mbuf.
+ */
+#define rte_pktmbuf_pkt_len(m) ((m)->pkt_len)
+
+/**
+ * A macro that returns the length of the segment.
+ *
+ * The value can be read or assigned.
+ *
+ * @param m
+ *   The packet mbuf.
+ */
+#define rte_pktmbuf_data_len(m) ((m)->data_len)
+
+/**
+ * Prepend len bytes to an mbuf data area.
+ *
+ * Returns a pointer to the new
+ * data start address. If there is not enough headroom in the first
+ * segment, the function will return NULL, without modifying the mbuf.
+ *
+ * @param m
+ *   The pkt mbuf.
+ * @param len
+ *   The amount of data to prepend (in bytes).
+ * @return
+ *   A pointer to the start of the newly prepended data, or
+ *   NULL if there is not enough headroom space in the first segment
+ */
+static inline char *rte_pktmbuf_prepend(struct rte_mbuf *m,
+					uint16_t len)
+{
+	__rte_mbuf_sanity_check(m, 1);
+
+	if (unlikely(len > rte_pktmbuf_headroom(m)))
+		return NULL;
+
+	m->data_off -= len;
+	m->data_len = (uint16_t)(m->data_len + len);
+	m->pkt_len  = (m->pkt_len + len);
+
+	return (char *)m->buf_addr + m->data_off;
+}
+
+/**
+ * Append len bytes to an mbuf.
+ *
+ * Append len bytes to an mbuf and return a pointer to the start address
+ * of the added data. If there is not enough tailroom in the last
+ * segment, the function will return NULL, without modifying the mbuf.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @param len
+ *   The amount of data to append (in bytes).
+ * @return
+ *   A pointer to the start of the newly appended data, or
+ *   NULL if there is not enough tailroom space in the last segment
+ */
+static inline char *rte_pktmbuf_append(struct rte_mbuf *m, uint16_t len)
+{
+	void *tail;
+	struct rte_mbuf *m_last;
+
+	__rte_mbuf_sanity_check(m, 1);
+
+	m_last = rte_pktmbuf_lastseg(m);
+	if (unlikely(len > rte_pktmbuf_tailroom(m_last)))
+		return NULL;
+
+	tail = (char *)m_last->buf_addr + m_last->data_off + m_last->data_len;
+	m_last->data_len = (uint16_t)(m_last->data_len + len);
+	m->pkt_len  = (m->pkt_len + len);
+	return (char*) tail;
+}
+
+/**
+ * Remove len bytes at the beginning of an mbuf.
+ *
+ * Returns a pointer to the start address of the new data area. If the
+ * length is greater than the length of the first segment, then the
+ * function will fail and return NULL, without modifying the mbuf.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @param len
+ *   The amount of data to remove (in bytes).
+ * @return
+ *   A pointer to the new start of the data.
+ */
+static inline char *rte_pktmbuf_adj(struct rte_mbuf *m, uint16_t len)
+{
+	__rte_mbuf_sanity_check(m, 1);
+
+	if (unlikely(len > m->data_len))
+		return NULL;
+
+	m->data_len = (uint16_t)(m->data_len - len);
+	m->data_off += len;
+	m->pkt_len  = (m->pkt_len - len);
+	return (char *)m->buf_addr + m->data_off;
+}
+
+/**
+ * Remove len bytes of data at the end of the mbuf.
+ *
+ * If the length is greater than the length of the last segment, the
+ * function will fail and return -1 without modifying the mbuf.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @param len
+ *   The amount of data to remove (in bytes).
+ * @return
+ *   - 0: On success.
+ *   - -1: On error.
+ */
+static inline int rte_pktmbuf_trim(struct rte_mbuf *m, uint16_t len)
+{
+	struct rte_mbuf *m_last;
+
+	__rte_mbuf_sanity_check(m, 1);
+
+	m_last = rte_pktmbuf_lastseg(m);
+	if (unlikely(len > m_last->data_len))
+		return -1;
+
+	m_last->data_len = (uint16_t)(m_last->data_len - len);
+	m->pkt_len  = (m->pkt_len - len);
+	return 0;
+}
+
+/**
+ * Test if mbuf data is contiguous.
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   - 1, if all data is contiguous (one segment).
+ *   - 0, if there is several segments.
+ */
+static inline int rte_pktmbuf_is_contiguous(const struct rte_mbuf *m)
+{
+	__rte_mbuf_sanity_check(m, 1);
+	return !!(m->nb_segs == 1);
+}
+
+/**
+ * Dump an mbuf structure to the console.
+ *
+ * Dump all fields for the given packet mbuf and all its associated
+ * segments (in the case of a chained buffer).
+ *
+ * @param f
+ *   A pointer to a file for output
+ * @param m
+ *   The packet mbuf.
+ * @param dump_len
+ *   If dump_len != 0, also dump the "dump_len" first data bytes of
+ *   the packet.
+ */
+void rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MBUF_H_ */
diff --git a/lib/librte_mbuf/Makefile b/lib/librte_mbuf/Makefile
deleted file mode 100644
index 9b45ba4..0000000
--- a/lib/librte_mbuf/Makefile
+++ /dev/null
@@ -1,48 +0,0 @@
-#   BSD LICENSE
-#
-#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
-#   All rights reserved.
-#
-#   Redistribution and use in source and binary forms, with or without
-#   modification, are permitted provided that the following conditions
-#   are met:
-#
-#     * Redistributions of source code must retain the above copyright
-#       notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above copyright
-#       notice, this list of conditions and the following disclaimer in
-#       the documentation and/or other materials provided with the
-#       distribution.
-#     * Neither the name of Intel Corporation nor the names of its
-#       contributors may be used to endorse or promote products derived
-#       from this software without specific prior written permission.
-#
-#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-include $(RTE_SDK)/mk/rte.vars.mk
-
-# library name
-LIB = librte_mbuf.a
-
-CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3
-
-# all source are stored in SRCS-y
-SRCS-$(CONFIG_RTE_LIBRTE_MBUF) := rte_mbuf.c
-
-# install includes
-SYMLINK-$(CONFIG_RTE_LIBRTE_MBUF)-include := rte_mbuf.h
-
-# this lib needs eal
-DEPDIRS-$(CONFIG_RTE_LIBRTE_MBUF) += lib/librte_eal lib/librte_mempool
-
-include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
deleted file mode 100644
index 1b14e02..0000000
--- a/lib/librte_mbuf/rte_mbuf.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   Copyright 2014 6WIND S.A.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdarg.h>
-#include <inttypes.h>
-#include <errno.h>
-#include <ctype.h>
-#include <sys/queue.h>
-
-#include <rte_debug.h>
-#include <rte_common.h>
-#include <rte_log.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_launch.h>
-#include <rte_tailq.h>
-#include <rte_eal.h>
-#include <rte_per_lcore.h>
-#include <rte_lcore.h>
-#include <rte_atomic.h>
-#include <rte_branch_prediction.h>
-#include <rte_ring.h>
-#include <rte_mempool.h>
-#include <rte_mbuf.h>
-#include <rte_string_fns.h>
-#include <rte_hexdump.h>
-
-/*
- * ctrlmbuf constructor, given as a callback function to
- * rte_mempool_create()
- */
-void
-rte_ctrlmbuf_init(struct rte_mempool *mp,
-		__attribute__((unused)) void *opaque_arg,
-		void *_m,
-		__attribute__((unused)) unsigned i)
-{
-	struct rte_mbuf *m = _m;
-	rte_pktmbuf_init(mp, opaque_arg, _m, i);
-	m->ol_flags |= CTRL_MBUF_FLAG;
-}
-
-/*
- * pktmbuf pool constructor, given as a callback function to
- * rte_mempool_create()
- */
-void
-rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg)
-{
-	struct rte_pktmbuf_pool_private *mbp_priv;
-	uint16_t roomsz;
-
-	mbp_priv = rte_mempool_get_priv(mp);
-	roomsz = (uint16_t)(uintptr_t)opaque_arg;
-
-	/* Use default data room size. */
-	if (0 == roomsz)
-		roomsz = 2048 + RTE_PKTMBUF_HEADROOM;
-
-	mbp_priv->mbuf_data_room_size = roomsz;
-}
-
-/*
- * pktmbuf constructor, given as a callback function to
- * rte_mempool_create().
- * Set the fields of a packet mbuf to their default values.
- */
-void
-rte_pktmbuf_init(struct rte_mempool *mp,
-		 __attribute__((unused)) void *opaque_arg,
-		 void *_m,
-		 __attribute__((unused)) unsigned i)
-{
-	struct rte_mbuf *m = _m;
-	uint32_t buf_len = mp->elt_size - sizeof(struct rte_mbuf);
-
-	RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf));
-
-	memset(m, 0, mp->elt_size);
-
-	/* start of buffer is just after mbuf structure */
-	m->buf_addr = (char *)m + sizeof(struct rte_mbuf);
-	m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
-			sizeof(struct rte_mbuf);
-	m->buf_len = (uint16_t)buf_len;
-
-	/* keep some headroom between start of buffer and data */
-	m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM, (uint16_t)m->buf_len);
-
-	/* init some constant fields */
-	m->pool = mp;
-	m->nb_segs = 1;
-	m->port = 0xff;
-}
-
-/* do some sanity checks on a mbuf: panic if it fails */
-void
-rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
-{
-	const struct rte_mbuf *m_seg;
-	unsigned nb_segs;
-
-	if (m == NULL)
-		rte_panic("mbuf is NULL\n");
-
-	/* generic checks */
-	if (m->pool == NULL)
-		rte_panic("bad mbuf pool\n");
-	if (m->buf_physaddr == 0)
-		rte_panic("bad phys addr\n");
-	if (m->buf_addr == NULL)
-		rte_panic("bad virt addr\n");
-
-#ifdef RTE_MBUF_REFCNT
-	uint16_t cnt = rte_mbuf_refcnt_read(m);
-	if ((cnt == 0) || (cnt == UINT16_MAX))
-		rte_panic("bad ref cnt\n");
-#endif
-
-	/* nothing to check for sub-segments */
-	if (is_header == 0)
-		return;
-
-	nb_segs = m->nb_segs;
-	m_seg = m;
-	while (m_seg && nb_segs != 0) {
-		m_seg = m_seg->next;
-		nb_segs--;
-	}
-	if (nb_segs != 0)
-		rte_panic("bad nb_segs\n");
-}
-
-/* dump a mbuf on console */
-void
-rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len)
-{
-	unsigned int len;
-	unsigned nb_segs;
-
-	__rte_mbuf_sanity_check(m, 1);
-
-	fprintf(f, "dump mbuf at 0x%p, phys=%"PRIx64", buf_len=%u\n",
-	       m, (uint64_t)m->buf_physaddr, (unsigned)m->buf_len);
-	fprintf(f, "  pkt_len=%"PRIu32", ol_flags=%"PRIx64", nb_segs=%u, "
-	       "in_port=%u\n", m->pkt_len, m->ol_flags,
-	       (unsigned)m->nb_segs, (unsigned)m->port);
-	nb_segs = m->nb_segs;
-
-	while (m && nb_segs != 0) {
-		__rte_mbuf_sanity_check(m, 0);
-
-		fprintf(f, "  segment at 0x%p, data=0x%p, data_len=%u\n",
-			m, rte_pktmbuf_mtod(m, void *), (unsigned)m->data_len);
-		len = dump_len;
-		if (len > m->data_len)
-			len = m->data_len;
-		if (len != 0)
-			rte_hexdump(f, NULL, rte_pktmbuf_mtod(m, void *), len);
-		dump_len -= len;
-		m = m->next;
-		nb_segs --;
-	}
-}
-
-/*
- * Get the name of a RX offload flag. Must be kept synchronized with flag
- * definitions in rte_mbuf.h.
- */
-const char *rte_get_rx_ol_flag_name(uint64_t mask)
-{
-	switch (mask) {
-	case PKT_RX_VLAN_PKT: return "PKT_RX_VLAN_PKT";
-	case PKT_RX_RSS_HASH: return "PKT_RX_RSS_HASH";
-	case PKT_RX_FDIR: return "PKT_RX_FDIR";
-	case PKT_RX_L4_CKSUM_BAD: return "PKT_RX_L4_CKSUM_BAD";
-	case PKT_RX_IP_CKSUM_BAD: return "PKT_RX_IP_CKSUM_BAD";
-	/* case PKT_RX_EIP_CKSUM_BAD: return "PKT_RX_EIP_CKSUM_BAD"; */
-	/* case PKT_RX_OVERSIZE: return "PKT_RX_OVERSIZE"; */
-	/* case PKT_RX_HBUF_OVERFLOW: return "PKT_RX_HBUF_OVERFLOW"; */
-	/* case PKT_RX_RECIP_ERR: return "PKT_RX_RECIP_ERR"; */
-	/* case PKT_RX_MAC_ERR: return "PKT_RX_MAC_ERR"; */
-	case PKT_RX_IPV4_HDR: return "PKT_RX_IPV4_HDR";
-	case PKT_RX_IPV4_HDR_EXT: return "PKT_RX_IPV4_HDR_EXT";
-	case PKT_RX_IPV6_HDR: return "PKT_RX_IPV6_HDR";
-	case PKT_RX_IPV6_HDR_EXT: return "PKT_RX_IPV6_HDR_EXT";
-	case PKT_RX_IEEE1588_PTP: return "PKT_RX_IEEE1588_PTP";
-	case PKT_RX_IEEE1588_TMST: return "PKT_RX_IEEE1588_TMST";
-	case PKT_RX_TUNNEL_IPV4_HDR: return "PKT_RX_TUNNEL_IPV4_HDR";
-	case PKT_RX_TUNNEL_IPV6_HDR: return "PKT_RX_TUNNEL_IPV6_HDR";
-	default: return NULL;
-	}
-}
-
-/*
- * Get the name of a TX offload flag. Must be kept synchronized with flag
- * definitions in rte_mbuf.h.
- */
-const char *rte_get_tx_ol_flag_name(uint64_t mask)
-{
-	switch (mask) {
-	case PKT_TX_VLAN_PKT: return "PKT_TX_VLAN_PKT";
-	case PKT_TX_IP_CKSUM: return "PKT_TX_IP_CKSUM";
-	case PKT_TX_TCP_CKSUM: return "PKT_TX_TCP_CKSUM";
-	case PKT_TX_SCTP_CKSUM: return "PKT_TX_SCTP_CKSUM";
-	case PKT_TX_UDP_CKSUM: return "PKT_TX_UDP_CKSUM";
-	case PKT_TX_IEEE1588_TMST: return "PKT_TX_IEEE1588_TMST";
-	case PKT_TX_UDP_TUNNEL_PKT: return "PKT_TX_UDP_TUNNEL_PKT";
-	case PKT_TX_TCP_SEG: return "PKT_TX_TCP_SEG";
-	case PKT_TX_IPV4: return "PKT_TX_IPV4";
-	case PKT_TX_IPV6: return "PKT_TX_IPV6";
-	case PKT_TX_OUTER_IP_CKSUM: return "PKT_TX_OUTER_IP_CKSUM";
-	case PKT_TX_OUTER_IPV4: return "PKT_TX_OUTER_IPV4";
-	case PKT_TX_OUTER_IPV6: return "PKT_TX_OUTER_IPV6";
-	default: return NULL;
-	}
-}
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
deleted file mode 100644
index 16059c6..0000000
--- a/lib/librte_mbuf/rte_mbuf.h
+++ /dev/null
@@ -1,1133 +0,0 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   Copyright 2014 6WIND S.A.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _RTE_MBUF_H_
-#define _RTE_MBUF_H_
-
-/**
- * @file
- * RTE Mbuf
- *
- * The mbuf library provides the ability to create and destroy buffers
- * that may be used by the RTE application to store message
- * buffers. The message buffers are stored in a mempool, using the
- * RTE mempool library.
- *
- * This library provide an API to allocate/free packet mbufs, which are
- * used to carry network packets.
- *
- * To understand the concepts of packet buffers or mbufs, you
- * should read "TCP/IP Illustrated, Volume 2: The Implementation,
- * Addison-Wesley, 1995, ISBN 0-201-63354-X from Richard Stevens"
- * http://www.kohala.com/start/tcpipiv2.html
- */
-
-#include <stdint.h>
-#include <rte_mempool.h>
-#include <rte_memory.h>
-#include <rte_atomic.h>
-#include <rte_prefetch.h>
-#include <rte_branch_prediction.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* deprecated feature, renamed in RTE_MBUF_REFCNT */
-#pragma GCC poison RTE_MBUF_SCATTER_GATHER
-
-/*
- * Packet Offload Features Flags. It also carry packet type information.
- * Critical resources. Both rx/tx shared these bits. Be cautious on any change
- *
- * - RX flags start at bit position zero, and get added to the left of previous
- *   flags.
- * - The most-significant 8 bits are reserved for generic mbuf flags
- * - TX flags therefore start at bit position 55 (i.e. 63-8), and new flags get
- *   added to the right of the previously defined flags
- *
- * Keep these flags synchronized with rte_get_rx_ol_flag_name() and
- * rte_get_tx_ol_flag_name().
- */
-#define PKT_RX_VLAN_PKT      (1ULL << 0)  /**< RX packet is a 802.1q VLAN packet. */
-#define PKT_RX_RSS_HASH      (1ULL << 1)  /**< RX packet with RSS hash result. */
-#define PKT_RX_FDIR          (1ULL << 2)  /**< RX packet with FDIR match indicate. */
-#define PKT_RX_L4_CKSUM_BAD  (1ULL << 3)  /**< L4 cksum of RX pkt. is not OK. */
-#define PKT_RX_IP_CKSUM_BAD  (1ULL << 4)  /**< IP cksum of RX pkt. is not OK. */
-#define PKT_RX_EIP_CKSUM_BAD (0ULL << 0)  /**< External IP header checksum error. */
-#define PKT_RX_OVERSIZE      (0ULL << 0)  /**< Num of desc of an RX pkt oversize. */
-#define PKT_RX_HBUF_OVERFLOW (0ULL << 0)  /**< Header buffer overflow. */
-#define PKT_RX_RECIP_ERR     (0ULL << 0)  /**< Hardware processing error. */
-#define PKT_RX_MAC_ERR       (0ULL << 0)  /**< MAC error. */
-#define PKT_RX_IPV4_HDR      (1ULL << 5)  /**< RX packet with IPv4 header. */
-#define PKT_RX_IPV4_HDR_EXT  (1ULL << 6)  /**< RX packet with extended IPv4 header. */
-#define PKT_RX_IPV6_HDR      (1ULL << 7)  /**< RX packet with IPv6 header. */
-#define PKT_RX_IPV6_HDR_EXT  (1ULL << 8)  /**< RX packet with extended IPv6 header. */
-#define PKT_RX_IEEE1588_PTP  (1ULL << 9)  /**< RX IEEE1588 L2 Ethernet PT Packet. */
-#define PKT_RX_IEEE1588_TMST (1ULL << 10) /**< RX IEEE1588 L2/L4 timestamped packet.*/
-#define PKT_RX_TUNNEL_IPV4_HDR (1ULL << 11) /**< RX tunnel packet with IPv4 header.*/
-#define PKT_RX_TUNNEL_IPV6_HDR (1ULL << 12) /**< RX tunnel packet with IPv6 header. */
-#define PKT_RX_FDIR_ID       (1ULL << 13) /**< FD id reported if FDIR match. */
-#define PKT_RX_FDIR_FLX      (1ULL << 14) /**< Flexible bytes reported if FDIR match. */
-/* add new RX flags here */
-
-/* add new TX flags here */
-
-/**
- * TCP segmentation offload. To enable this offload feature for a
- * packet to be transmitted on hardware supporting TSO:
- *  - set the PKT_TX_TCP_SEG flag in mbuf->ol_flags (this flag implies
- *    PKT_TX_TCP_CKSUM)
- *  - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
- *  - if it's IPv4, set the PKT_TX_IP_CKSUM flag and write the IP checksum
- *    to 0 in the packet
- *  - fill the mbuf offload information: l2_len, l3_len, l4_len, tso_segsz
- *  - calculate the pseudo header checksum without taking ip_len in account,
- *    and set it in the TCP header. Refer to rte_ipv4_phdr_cksum() and
- *    rte_ipv6_phdr_cksum() that can be used as helpers.
- */
-#define PKT_TX_TCP_SEG       (1ULL << 49)
-
-/** TX packet is an UDP tunneled packet. It must be specified when using
- *  outer checksum offload (PKT_TX_OUTER_IP_CKSUM) */
-#define PKT_TX_UDP_TUNNEL_PKT (1ULL << 50) /**< TX packet is an UDP tunneled packet */
-#define PKT_TX_IEEE1588_TMST (1ULL << 51) /**< TX IEEE1588 packet to timestamp. */
-
-/**
- * Bits 52+53 used for L4 packet type with checksum enabled: 00: Reserved,
- * 01: TCP checksum, 10: SCTP checksum, 11: UDP checksum. To use hardware
- * L4 checksum offload, the user needs to:
- *  - fill l2_len and l3_len in mbuf
- *  - set the flags PKT_TX_TCP_CKSUM, PKT_TX_SCTP_CKSUM or PKT_TX_UDP_CKSUM
- *  - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
- *  - calculate the pseudo header checksum and set it in the L4 header (only
- *    for TCP or UDP). See rte_ipv4_phdr_cksum() and rte_ipv6_phdr_cksum().
- *    For SCTP, set the crc field to 0.
- */
-#define PKT_TX_L4_NO_CKSUM   (0ULL << 52) /**< Disable L4 cksum of TX pkt. */
-#define PKT_TX_TCP_CKSUM     (1ULL << 52) /**< TCP cksum of TX pkt. computed by NIC. */
-#define PKT_TX_SCTP_CKSUM    (2ULL << 52) /**< SCTP cksum of TX pkt. computed by NIC. */
-#define PKT_TX_UDP_CKSUM     (3ULL << 52) /**< UDP cksum of TX pkt. computed by NIC. */
-#define PKT_TX_L4_MASK       (3ULL << 52) /**< Mask for L4 cksum offload request. */
-
-#define PKT_TX_IP_CKSUM      (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
-#define PKT_TX_IPV4_CSUM     PKT_TX_IP_CKSUM /**< Alias of PKT_TX_IP_CKSUM. */
-
-/** Packet is IPv4 without requiring IP checksum offload. */
-#define PKT_TX_IPV4          (1ULL << 55)
-
-/** Tell the NIC it's an IPv6 packet.*/
-#define PKT_TX_IPV6          (1ULL << 56)
-
-#define PKT_TX_VLAN_PKT      (1ULL << 57) /**< TX packet is a 802.1q VLAN packet. */
-
-/** Outer IP checksum of TX packet, computed by NIC for tunneling packet.
- *  The tunnel type must also be specified, ex: PKT_TX_UDP_TUNNEL_PKT. */
-#define PKT_TX_OUTER_IP_CKSUM   (1ULL << 58)
-
-/** Packet is outer IPv4 without requiring IP checksum offload for tunneling packet. */
-#define PKT_TX_OUTER_IPV4   (1ULL << 59)
-
-/** Tell the NIC it's an outer IPv6 packet for tunneling packet */
-#define PKT_TX_OUTER_IPV6    (1ULL << 60)
-
-/* Use final bit of flags to indicate a control mbuf */
-#define CTRL_MBUF_FLAG       (1ULL << 63) /**< Mbuf contains control data */
-
-/**
- * Get the name of a RX offload flag
- *
- * @param mask
- *   The mask describing the flag.
- * @return
- *   The name of this flag, or NULL if it's not a valid RX flag.
- */
-const char *rte_get_rx_ol_flag_name(uint64_t mask);
-
-/**
- * Get the name of a TX offload flag
- *
- * @param mask
- *   The mask describing the flag. Usually only one bit must be set.
- *   Several bits can be given if they belong to the same mask.
- *   Ex: PKT_TX_L4_MASK.
- * @return
- *   The name of this flag, or NULL if it's not a valid TX flag.
- */
-const char *rte_get_tx_ol_flag_name(uint64_t mask);
-
-/* define a set of marker types that can be used to refer to set points in the
- * mbuf */
-typedef void    *MARKER[0];   /**< generic marker for a point in a structure */
-typedef uint8_t  MARKER8[0];  /**< generic marker with 1B alignment */
-typedef uint64_t MARKER64[0]; /**< marker that allows us to overwrite 8 bytes
-                               * with a single assignment */
-
-/**
- * The generic rte_mbuf, containing a packet mbuf.
- */
-struct rte_mbuf {
-	MARKER cacheline0;
-
-	void *buf_addr;           /**< Virtual address of segment buffer. */
-	phys_addr_t buf_physaddr; /**< Physical address of segment buffer. */
-
-	uint16_t buf_len;         /**< Length of segment buffer. */
-
-	/* next 6 bytes are initialised on RX descriptor rearm */
-	MARKER8 rearm_data;
-	uint16_t data_off;
-
-	/**
-	 * 16-bit Reference counter.
-	 * It should only be accessed using the following functions:
-	 * rte_mbuf_refcnt_update(), rte_mbuf_refcnt_read(), and
-	 * rte_mbuf_refcnt_set(). The functionality of these functions (atomic,
-	 * or non-atomic) is controlled by the CONFIG_RTE_MBUF_REFCNT_ATOMIC
-	 * config option.
-	 */
-	union {
-#ifdef RTE_MBUF_REFCNT
-		rte_atomic16_t refcnt_atomic; /**< Atomically accessed refcnt */
-		uint16_t refcnt;              /**< Non-atomically accessed refcnt */
-#endif
-		uint16_t refcnt_reserved;     /**< Do not use this field */
-	};
-	uint8_t nb_segs;          /**< Number of segments. */
-	uint8_t port;             /**< Input port. */
-
-	uint64_t ol_flags;        /**< Offload features. */
-
-	/* remaining bytes are set on RX when pulling packet from descriptor */
-	MARKER rx_descriptor_fields1;
-
-	/**
-	 * The packet type, which is used to indicate ordinary packet and also
-	 * tunneled packet format, i.e. each number is represented a type of
-	 * packet.
-	 */
-	uint16_t packet_type;
-
-	uint16_t data_len;        /**< Amount of data in segment buffer. */
-	uint32_t pkt_len;         /**< Total pkt len: sum of all segments. */
-	uint16_t vlan_tci;        /**< VLAN Tag Control Identifier (CPU order) */
-	uint16_t reserved;
-	union {
-		uint32_t rss;     /**< RSS hash result if RSS enabled */
-		struct {
-			union {
-				struct {
-					uint16_t hash;
-					uint16_t id;
-				};
-				uint32_t lo;
-				/**< Second 4 flexible bytes */
-			};
-			uint32_t hi;
-			/**< First 4 flexible bytes or FD ID, dependent on
-			     PKT_RX_FDIR_* flag in ol_flags. */
-		} fdir;           /**< Filter identifier if FDIR enabled */
-		uint32_t sched;   /**< Hierarchical scheduler */
-		uint32_t usr;	  /**< User defined tags. See @rte_distributor_process */
-	} hash;                   /**< hash information */
-
-	/* second cache line - fields only used in slow path or on TX */
-	MARKER cacheline1 __rte_cache_aligned;
-
-	union {
-		void *userdata;   /**< Can be used for external metadata */
-		uint64_t udata64; /**< Allow 8-byte userdata on 32-bit */
-	};
-
-	struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */
-	struct rte_mbuf *next;    /**< Next segment of scattered packet. */
-
-	/* fields to support TX offloads */
-	union {
-		uint64_t tx_offload;       /**< combined for easy fetch */
-		struct {
-			uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
-			uint64_t l3_len:9; /**< L3 (IP) Header Length. */
-			uint64_t l4_len:8; /**< L4 (TCP/UDP) Header Length. */
-			uint64_t tso_segsz:16; /**< TCP TSO segment size */
-
-			/* fields for TX offloading of tunnels */
-			uint64_t outer_l3_len:9; /**< Outer L3 (IP) Hdr Length. */
-			uint64_t outer_l2_len:7; /**< Outer L2 (MAC) Hdr Length. */
-
-			/* uint64_t unused:8; */
-		};
-	};
-} __rte_cache_aligned;
-
-/**
- * Given the buf_addr returns the pointer to corresponding mbuf.
- */
-#define RTE_MBUF_FROM_BADDR(ba)     (((struct rte_mbuf *)(ba)) - 1)
-
-/**
- * Given the pointer to mbuf returns an address where it's  buf_addr
- * should point to.
- */
-#define RTE_MBUF_TO_BADDR(mb)       (((struct rte_mbuf *)(mb)) + 1)
-
-/**
- * Returns TRUE if given mbuf is indirect, or FALSE otherwise.
- */
-#define RTE_MBUF_INDIRECT(mb)   (RTE_MBUF_FROM_BADDR((mb)->buf_addr) != (mb))
-
-/**
- * Returns TRUE if given mbuf is direct, or FALSE otherwise.
- */
-#define RTE_MBUF_DIRECT(mb)     (RTE_MBUF_FROM_BADDR((mb)->buf_addr) == (mb))
-
-
-/**
- * Private data in case of pktmbuf pool.
- *
- * A structure that contains some pktmbuf_pool-specific data that are
- * appended after the mempool structure (in private data).
- */
-struct rte_pktmbuf_pool_private {
-	uint16_t mbuf_data_room_size; /**< Size of data space in each mbuf.*/
-};
-
-#ifdef RTE_LIBRTE_MBUF_DEBUG
-
-/**  check mbuf type in debug mode */
-#define __rte_mbuf_sanity_check(m, is_h) rte_mbuf_sanity_check(m, is_h)
-
-/**  check mbuf type in debug mode if mbuf pointer is not null */
-#define __rte_mbuf_sanity_check_raw(m, is_h)	do {       \
-	if ((m) != NULL)                                   \
-		rte_mbuf_sanity_check(m, is_h);          \
-} while (0)
-
-/**  MBUF asserts in debug mode */
-#define RTE_MBUF_ASSERT(exp)                                         \
-if (!(exp)) {                                                        \
-	rte_panic("line%d\tassert \"" #exp "\" failed\n", __LINE__); \
-}
-
-#else /*  RTE_LIBRTE_MBUF_DEBUG */
-
-/**  check mbuf type in debug mode */
-#define __rte_mbuf_sanity_check(m, is_h) do { } while (0)
-
-/**  check mbuf type in debug mode if mbuf pointer is not null */
-#define __rte_mbuf_sanity_check_raw(m, is_h) do { } while (0)
-
-/**  MBUF asserts in debug mode */
-#define RTE_MBUF_ASSERT(exp)                do { } while (0)
-
-#endif /*  RTE_LIBRTE_MBUF_DEBUG */
-
-#ifdef RTE_MBUF_REFCNT
-#ifdef RTE_MBUF_REFCNT_ATOMIC
-
-/**
- * Adds given value to an mbuf's refcnt and returns its new value.
- * @param m
- *   Mbuf to update
- * @param value
- *   Value to add/subtract
- * @return
- *   Updated value
- */
-static inline uint16_t
-rte_mbuf_refcnt_update(struct rte_mbuf *m, int16_t value)
-{
-	return (uint16_t)(rte_atomic16_add_return(&m->refcnt_atomic, value));
-}
-
-/**
- * Reads the value of an mbuf's refcnt.
- * @param m
- *   Mbuf to read
- * @return
- *   Reference count number.
- */
-static inline uint16_t
-rte_mbuf_refcnt_read(const struct rte_mbuf *m)
-{
-	return (uint16_t)(rte_atomic16_read(&m->refcnt_atomic));
-}
-
-/**
- * Sets an mbuf's refcnt to a defined value.
- * @param m
- *   Mbuf to update
- * @param new_value
- *   Value set
- */
-static inline void
-rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
-{
-	rte_atomic16_set(&m->refcnt_atomic, new_value);
-}
-
-#else /* ! RTE_MBUF_REFCNT_ATOMIC */
-
-/**
- * Adds given value to an mbuf's refcnt and returns its new value.
- */
-static inline uint16_t
-rte_mbuf_refcnt_update(struct rte_mbuf *m, int16_t value)
-{
-	m->refcnt = (uint16_t)(m->refcnt + value);
-	return m->refcnt;
-}
-
-/**
- * Reads the value of an mbuf's refcnt.
- */
-static inline uint16_t
-rte_mbuf_refcnt_read(const struct rte_mbuf *m)
-{
-	return m->refcnt;
-}
-
-/**
- * Sets an mbuf's refcnt to the defined value.
- */
-static inline void
-rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
-{
-	m->refcnt = new_value;
-}
-
-#endif /* RTE_MBUF_REFCNT_ATOMIC */
-
-/** Mbuf prefetch */
-#define RTE_MBUF_PREFETCH_TO_FREE(m) do {       \
-	if ((m) != NULL)                        \
-		rte_prefetch0(m);               \
-} while (0)
-
-#else /* ! RTE_MBUF_REFCNT */
-
-/** Mbuf prefetch */
-#define RTE_MBUF_PREFETCH_TO_FREE(m) do { } while(0)
-
-#define rte_mbuf_refcnt_set(m,v) do { } while(0)
-
-#endif /* RTE_MBUF_REFCNT */
-
-
-/**
- * Sanity checks on an mbuf.
- *
- * Check the consistency of the given mbuf. The function will cause a
- * panic if corruption is detected.
- *
- * @param m
- *   The mbuf to be checked.
- * @param is_header
- *   True if the mbuf is a packet header, false if it is a sub-segment
- *   of a packet (in this case, some fields like nb_segs are not checked)
- */
-void
-rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header);
-
-/**
- * @internal Allocate a new mbuf from mempool *mp*.
- * The use of that function is reserved for RTE internal needs.
- * Please use rte_pktmbuf_alloc().
- *
- * @param mp
- *   The mempool from which mbuf is allocated.
- * @return
- *   - The pointer to the new mbuf on success.
- *   - NULL if allocation failed.
- */
-static inline struct rte_mbuf *__rte_mbuf_raw_alloc(struct rte_mempool *mp)
-{
-	struct rte_mbuf *m;
-	void *mb = NULL;
-	if (rte_mempool_get(mp, &mb) < 0)
-		return NULL;
-	m = (struct rte_mbuf *)mb;
-#ifdef RTE_MBUF_REFCNT
-	RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0);
-	rte_mbuf_refcnt_set(m, 1);
-#endif /* RTE_MBUF_REFCNT */
-	return (m);
-}
-
-/**
- * @internal Put mbuf back into its original mempool.
- * The use of that function is reserved for RTE internal needs.
- * Please use rte_pktmbuf_free().
- *
- * @param m
- *   The mbuf to be freed.
- */
-static inline void __attribute__((always_inline))
-__rte_mbuf_raw_free(struct rte_mbuf *m)
-{
-#ifdef RTE_MBUF_REFCNT
-	RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0);
-#endif /* RTE_MBUF_REFCNT */
-	rte_mempool_put(m->pool, m);
-}
-
-/* Operations on ctrl mbuf */
-
-/**
- * The control mbuf constructor.
- *
- * This function initializes some fields in an mbuf structure that are
- * not modified by the user once created (mbuf type, origin pool, buffer
- * start address, and so on). This function is given as a callback function
- * to rte_mempool_create() at pool creation time.
- *
- * @param mp
- *   The mempool from which the mbuf is allocated.
- * @param opaque_arg
- *   A pointer that can be used by the user to retrieve useful information
- *   for mbuf initialization. This pointer comes from the ``init_arg``
- *   parameter of rte_mempool_create().
- * @param m
- *   The mbuf to initialize.
- * @param i
- *   The index of the mbuf in the pool table.
- */
-void rte_ctrlmbuf_init(struct rte_mempool *mp, void *opaque_arg,
-		void *m, unsigned i);
-
-/**
- * Allocate a new mbuf (type is ctrl) from mempool *mp*.
- *
- * This new mbuf is initialized with data pointing to the beginning of
- * buffer, and with a length of zero.
- *
- * @param mp
- *   The mempool from which the mbuf is allocated.
- * @return
- *   - The pointer to the new mbuf on success.
- *   - NULL if allocation failed.
- */
-#define rte_ctrlmbuf_alloc(mp) rte_pktmbuf_alloc(mp)
-
-/**
- * Free a control mbuf back into its original mempool.
- *
- * @param m
- *   The control mbuf to be freed.
- */
-#define rte_ctrlmbuf_free(m) rte_pktmbuf_free(m)
-
-/**
- * A macro that returns the pointer to the carried data.
- *
- * The value that can be read or assigned.
- *
- * @param m
- *   The control mbuf.
- */
-#define rte_ctrlmbuf_data(m) ((char *)((m)->buf_addr) + (m)->data_off)
-
-/**
- * A macro that returns the length of the carried data.
- *
- * The value that can be read or assigned.
- *
- * @param m
- *   The control mbuf.
- */
-#define rte_ctrlmbuf_len(m) rte_pktmbuf_data_len(m)
-
-/**
- * Tests if an mbuf is a control mbuf
- *
- * @param m
- *   The mbuf to be tested
- * @return
- *   - True (1) if the mbuf is a control mbuf
- *   - False(0) otherwise
- */
-static inline int
-rte_is_ctrlmbuf(struct rte_mbuf *m)
-{
-	return (!!(m->ol_flags & CTRL_MBUF_FLAG));
-}
-
-/* Operations on pkt mbuf */
-
-/**
- * The packet mbuf constructor.
- *
- * This function initializes some fields in the mbuf structure that are
- * not modified by the user once created (origin pool, buffer start
- * address, and so on). This function is given as a callback function to
- * rte_mempool_create() at pool creation time.
- *
- * @param mp
- *   The mempool from which mbufs originate.
- * @param opaque_arg
- *   A pointer that can be used by the user to retrieve useful information
- *   for mbuf initialization. This pointer comes from the ``init_arg``
- *   parameter of rte_mempool_create().
- * @param m
- *   The mbuf to initialize.
- * @param i
- *   The index of the mbuf in the pool table.
- */
-void rte_pktmbuf_init(struct rte_mempool *mp, void *opaque_arg,
-		      void *m, unsigned i);
-
-
-/**
- * A  packet mbuf pool constructor.
- *
- * This function initializes the mempool private data in the case of a
- * pktmbuf pool. This private data is needed by the driver. The
- * function is given as a callback function to rte_mempool_create() at
- * pool creation. It can be extended by the user, for example, to
- * provide another packet size.
- *
- * @param mp
- *   The mempool from which mbufs originate.
- * @param opaque_arg
- *   A pointer that can be used by the user to retrieve useful information
- *   for mbuf initialization. This pointer comes from the ``init_arg``
- *   parameter of rte_mempool_create().
- */
-void rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg);
-
-/**
- * Reset the fields of a packet mbuf to their default values.
- *
- * The given mbuf must have only one segment.
- *
- * @param m
- *   The packet mbuf to be resetted.
- */
-static inline void rte_pktmbuf_reset(struct rte_mbuf *m)
-{
-	m->next = NULL;
-	m->pkt_len = 0;
-	m->tx_offload = 0;
-	m->vlan_tci = 0;
-	m->nb_segs = 1;
-	m->port = 0xff;
-
-	m->ol_flags = 0;
-	m->packet_type = 0;
-	m->data_off = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ?
-			RTE_PKTMBUF_HEADROOM : m->buf_len;
-
-	m->data_len = 0;
-	__rte_mbuf_sanity_check(m, 1);
-}
-
-/**
- * Allocate a new mbuf from a mempool.
- *
- * This new mbuf contains one segment, which has a length of 0. The pointer
- * to data is initialized to have some bytes of headroom in the buffer
- * (if buffer size allows).
- *
- * @param mp
- *   The mempool from which the mbuf is allocated.
- * @return
- *   - The pointer to the new mbuf on success.
- *   - NULL if allocation failed.
- */
-static inline struct rte_mbuf *rte_pktmbuf_alloc(struct rte_mempool *mp)
-{
-	struct rte_mbuf *m;
-	if ((m = __rte_mbuf_raw_alloc(mp)) != NULL)
-		rte_pktmbuf_reset(m);
-	return (m);
-}
-
-#ifdef RTE_MBUF_REFCNT
-
-/**
- * Attach packet mbuf to another packet mbuf.
- * After attachment we refer the mbuf we attached as 'indirect',
- * while mbuf we attached to as 'direct'.
- * Right now, not supported:
- *  - attachment to indirect mbuf (e.g. - md  has to be direct).
- *  - attachment for already indirect mbuf (e.g. - mi has to be direct).
- *  - mbuf we trying to attach (mi) is used by someone else
- *    e.g. it's reference counter is greater then 1.
- *
- * @param mi
- *   The indirect packet mbuf.
- * @param md
- *   The direct packet mbuf.
- */
-
-static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *md)
-{
-	RTE_MBUF_ASSERT(RTE_MBUF_DIRECT(md) &&
-	    RTE_MBUF_DIRECT(mi) &&
-	    rte_mbuf_refcnt_read(mi) == 1);
-
-	rte_mbuf_refcnt_update(md, 1);
-	mi->buf_physaddr = md->buf_physaddr;
-	mi->buf_addr = md->buf_addr;
-	mi->buf_len = md->buf_len;
-
-	mi->next = md->next;
-	mi->data_off = md->data_off;
-	mi->data_len = md->data_len;
-	mi->port = md->port;
-	mi->vlan_tci = md->vlan_tci;
-	mi->tx_offload = md->tx_offload;
-	mi->hash = md->hash;
-
-	mi->next = NULL;
-	mi->pkt_len = mi->data_len;
-	mi->nb_segs = 1;
-	mi->ol_flags = md->ol_flags;
-	mi->packet_type = md->packet_type;
-
-	__rte_mbuf_sanity_check(mi, 1);
-	__rte_mbuf_sanity_check(md, 0);
-}
-
-/**
- * Detach an indirect packet mbuf -
- *  - restore original mbuf address and length values.
- *  - reset pktmbuf data and data_len to their default values.
- *  All other fields of the given packet mbuf will be left intact.
- *
- * @param m
- *   The indirect attached packet mbuf.
- */
-
-static inline void rte_pktmbuf_detach(struct rte_mbuf *m)
-{
-	const struct rte_mempool *mp = m->pool;
-	void *buf = RTE_MBUF_TO_BADDR(m);
-	uint32_t buf_len = mp->elt_size - sizeof(*m);
-	m->buf_physaddr = rte_mempool_virt2phy(mp, m) + sizeof (*m);
-
-	m->buf_addr = buf;
-	m->buf_len = (uint16_t)buf_len;
-
-	m->data_off = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ?
-			RTE_PKTMBUF_HEADROOM : m->buf_len;
-
-	m->data_len = 0;
-}
-
-#endif /* RTE_MBUF_REFCNT */
-
-
-static inline struct rte_mbuf* __attribute__((always_inline))
-__rte_pktmbuf_prefree_seg(struct rte_mbuf *m)
-{
-	__rte_mbuf_sanity_check(m, 0);
-
-#ifdef RTE_MBUF_REFCNT
-	if (likely (rte_mbuf_refcnt_read(m) == 1) ||
-			likely (rte_mbuf_refcnt_update(m, -1) == 0)) {
-		struct rte_mbuf *md = RTE_MBUF_FROM_BADDR(m->buf_addr);
-
-		rte_mbuf_refcnt_set(m, 0);
-
-		/* if this is an indirect mbuf, then
-		 *  - detach mbuf
-		 *  - free attached mbuf segment
-		 */
-		if (unlikely (md != m)) {
-			rte_pktmbuf_detach(m);
-			if (rte_mbuf_refcnt_update(md, -1) == 0)
-				__rte_mbuf_raw_free(md);
-		}
-#endif
-		return(m);
-#ifdef RTE_MBUF_REFCNT
-	}
-	return (NULL);
-#endif
-}
-
-/**
- * Free a segment of a packet mbuf into its original mempool.
- *
- * Free an mbuf, without parsing other segments in case of chained
- * buffers.
- *
- * @param m
- *   The packet mbuf segment to be freed.
- */
-static inline void __attribute__((always_inline))
-rte_pktmbuf_free_seg(struct rte_mbuf *m)
-{
-	if (likely(NULL != (m = __rte_pktmbuf_prefree_seg(m)))) {
-		m->next = NULL;
-		__rte_mbuf_raw_free(m);
-	}
-}
-
-/**
- * Free a packet mbuf back into its original mempool.
- *
- * Free an mbuf, and all its segments in case of chained buffers. Each
- * segment is added back into its original mempool.
- *
- * @param m
- *   The packet mbuf to be freed.
- */
-static inline void rte_pktmbuf_free(struct rte_mbuf *m)
-{
-	struct rte_mbuf *m_next;
-
-	__rte_mbuf_sanity_check(m, 1);
-
-	while (m != NULL) {
-		m_next = m->next;
-		rte_pktmbuf_free_seg(m);
-		m = m_next;
-	}
-}
-
-#ifdef RTE_MBUF_REFCNT
-
-/**
- * Creates a "clone" of the given packet mbuf.
- *
- * Walks through all segments of the given packet mbuf, and for each of them:
- *  - Creates a new packet mbuf from the given pool.
- *  - Attaches newly created mbuf to the segment.
- * Then updates pkt_len and nb_segs of the "clone" packet mbuf to match values
- * from the original packet mbuf.
- *
- * @param md
- *   The packet mbuf to be cloned.
- * @param mp
- *   The mempool from which the "clone" mbufs are allocated.
- * @return
- *   - The pointer to the new "clone" mbuf on success.
- *   - NULL if allocation fails.
- */
-static inline struct rte_mbuf *rte_pktmbuf_clone(struct rte_mbuf *md,
-		struct rte_mempool *mp)
-{
-	struct rte_mbuf *mc, *mi, **prev;
-	uint32_t pktlen;
-	uint8_t nseg;
-
-	if (unlikely ((mc = rte_pktmbuf_alloc(mp)) == NULL))
-		return (NULL);
-
-	mi = mc;
-	prev = &mi->next;
-	pktlen = md->pkt_len;
-	nseg = 0;
-
-	do {
-		nseg++;
-		rte_pktmbuf_attach(mi, md);
-		*prev = mi;
-		prev = &mi->next;
-	} while ((md = md->next) != NULL &&
-	    (mi = rte_pktmbuf_alloc(mp)) != NULL);
-
-	*prev = NULL;
-	mc->nb_segs = nseg;
-	mc->pkt_len = pktlen;
-
-	/* Allocation of new indirect segment failed */
-	if (unlikely (mi == NULL)) {
-		rte_pktmbuf_free(mc);
-		return (NULL);
-	}
-
-	__rte_mbuf_sanity_check(mc, 1);
-	return (mc);
-}
-
-/**
- * Adds given value to the refcnt of all packet mbuf segments.
- *
- * Walks through all segments of given packet mbuf and for each of them
- * invokes rte_mbuf_refcnt_update().
- *
- * @param m
- *   The packet mbuf whose refcnt to be updated.
- * @param v
- *   The value to add to the mbuf's segments refcnt.
- */
-static inline void rte_pktmbuf_refcnt_update(struct rte_mbuf *m, int16_t v)
-{
-	__rte_mbuf_sanity_check(m, 1);
-
-	do {
-		rte_mbuf_refcnt_update(m, v);
-	} while ((m = m->next) != NULL);
-}
-
-#endif /* RTE_MBUF_REFCNT */
-
-/**
- * Get the headroom in a packet mbuf.
- *
- * @param m
- *   The packet mbuf.
- * @return
- *   The length of the headroom.
- */
-static inline uint16_t rte_pktmbuf_headroom(const struct rte_mbuf *m)
-{
-	__rte_mbuf_sanity_check(m, 1);
-	return m->data_off;
-}
-
-/**
- * Get the tailroom of a packet mbuf.
- *
- * @param m
- *   The packet mbuf.
- * @return
- *   The length of the tailroom.
- */
-static inline uint16_t rte_pktmbuf_tailroom(const struct rte_mbuf *m)
-{
-	__rte_mbuf_sanity_check(m, 1);
-	return (uint16_t)(m->buf_len - rte_pktmbuf_headroom(m) -
-			  m->data_len);
-}
-
-/**
- * Get the last segment of the packet.
- *
- * @param m
- *   The packet mbuf.
- * @return
- *   The last segment of the given mbuf.
- */
-static inline struct rte_mbuf *rte_pktmbuf_lastseg(struct rte_mbuf *m)
-{
-	struct rte_mbuf *m2 = (struct rte_mbuf *)m;
-
-	__rte_mbuf_sanity_check(m, 1);
-	while (m2->next != NULL)
-		m2 = m2->next;
-	return m2;
-}
-
-/**
- * A macro that points to the start of the data in the mbuf.
- *
- * The returned pointer is cast to type t. Before using this
- * function, the user must ensure that m_headlen(m) is large enough to
- * read its data.
- *
- * @param m
- *   The packet mbuf.
- * @param t
- *   The type to cast the result into.
- */
-#define rte_pktmbuf_mtod(m, t) ((t)((char *)(m)->buf_addr + (m)->data_off))
-
-/**
- * A macro that returns the length of the packet.
- *
- * The value can be read or assigned.
- *
- * @param m
- *   The packet mbuf.
- */
-#define rte_pktmbuf_pkt_len(m) ((m)->pkt_len)
-
-/**
- * A macro that returns the length of the segment.
- *
- * The value can be read or assigned.
- *
- * @param m
- *   The packet mbuf.
- */
-#define rte_pktmbuf_data_len(m) ((m)->data_len)
-
-/**
- * Prepend len bytes to an mbuf data area.
- *
- * Returns a pointer to the new
- * data start address. If there is not enough headroom in the first
- * segment, the function will return NULL, without modifying the mbuf.
- *
- * @param m
- *   The pkt mbuf.
- * @param len
- *   The amount of data to prepend (in bytes).
- * @return
- *   A pointer to the start of the newly prepended data, or
- *   NULL if there is not enough headroom space in the first segment
- */
-static inline char *rte_pktmbuf_prepend(struct rte_mbuf *m,
-					uint16_t len)
-{
-	__rte_mbuf_sanity_check(m, 1);
-
-	if (unlikely(len > rte_pktmbuf_headroom(m)))
-		return NULL;
-
-	m->data_off -= len;
-	m->data_len = (uint16_t)(m->data_len + len);
-	m->pkt_len  = (m->pkt_len + len);
-
-	return (char *)m->buf_addr + m->data_off;
-}
-
-/**
- * Append len bytes to an mbuf.
- *
- * Append len bytes to an mbuf and return a pointer to the start address
- * of the added data. If there is not enough tailroom in the last
- * segment, the function will return NULL, without modifying the mbuf.
- *
- * @param m
- *   The packet mbuf.
- * @param len
- *   The amount of data to append (in bytes).
- * @return
- *   A pointer to the start of the newly appended data, or
- *   NULL if there is not enough tailroom space in the last segment
- */
-static inline char *rte_pktmbuf_append(struct rte_mbuf *m, uint16_t len)
-{
-	void *tail;
-	struct rte_mbuf *m_last;
-
-	__rte_mbuf_sanity_check(m, 1);
-
-	m_last = rte_pktmbuf_lastseg(m);
-	if (unlikely(len > rte_pktmbuf_tailroom(m_last)))
-		return NULL;
-
-	tail = (char *)m_last->buf_addr + m_last->data_off + m_last->data_len;
-	m_last->data_len = (uint16_t)(m_last->data_len + len);
-	m->pkt_len  = (m->pkt_len + len);
-	return (char*) tail;
-}
-
-/**
- * Remove len bytes at the beginning of an mbuf.
- *
- * Returns a pointer to the start address of the new data area. If the
- * length is greater than the length of the first segment, then the
- * function will fail and return NULL, without modifying the mbuf.
- *
- * @param m
- *   The packet mbuf.
- * @param len
- *   The amount of data to remove (in bytes).
- * @return
- *   A pointer to the new start of the data.
- */
-static inline char *rte_pktmbuf_adj(struct rte_mbuf *m, uint16_t len)
-{
-	__rte_mbuf_sanity_check(m, 1);
-
-	if (unlikely(len > m->data_len))
-		return NULL;
-
-	m->data_len = (uint16_t)(m->data_len - len);
-	m->data_off += len;
-	m->pkt_len  = (m->pkt_len - len);
-	return (char *)m->buf_addr + m->data_off;
-}
-
-/**
- * Remove len bytes of data at the end of the mbuf.
- *
- * If the length is greater than the length of the last segment, the
- * function will fail and return -1 without modifying the mbuf.
- *
- * @param m
- *   The packet mbuf.
- * @param len
- *   The amount of data to remove (in bytes).
- * @return
- *   - 0: On success.
- *   - -1: On error.
- */
-static inline int rte_pktmbuf_trim(struct rte_mbuf *m, uint16_t len)
-{
-	struct rte_mbuf *m_last;
-
-	__rte_mbuf_sanity_check(m, 1);
-
-	m_last = rte_pktmbuf_lastseg(m);
-	if (unlikely(len > m_last->data_len))
-		return -1;
-
-	m_last->data_len = (uint16_t)(m_last->data_len - len);
-	m->pkt_len  = (m->pkt_len - len);
-	return 0;
-}
-
-/**
- * Test if mbuf data is contiguous.
- *
- * @param m
- *   The packet mbuf.
- * @return
- *   - 1, if all data is contiguous (one segment).
- *   - 0, if there is several segments.
- */
-static inline int rte_pktmbuf_is_contiguous(const struct rte_mbuf *m)
-{
-	__rte_mbuf_sanity_check(m, 1);
-	return !!(m->nb_segs == 1);
-}
-
-/**
- * Dump an mbuf structure to the console.
- *
- * Dump all fields for the given packet mbuf and all its associated
- * segments (in the case of a chained buffer).
- *
- * @param f
- *   A pointer to a file for output
- * @param m
- *   The packet mbuf.
- * @param dump_len
- *   If dump_len != 0, also dump the "dump_len" first data bytes of
- *   the packet.
- */
-void rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _RTE_MBUF_H_ */
