port: IPv4 fragmentation
This port presents the IPv4 fragmentation operation as a Packet Framework port. Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com> Acked-by: Pablo de Lara Guarch <pablo.de.lara.guarch@intel.com> Acked by: Ivan Boule <ivan.boule@6wind.com> [Thomas: update to new ip_frag library] Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
This commit is contained in:
Cristian Dumitrescu
Thomas Monjalon
parent
bf6931b242
commit
9ec4f0900b
@ -104,6 +104,7 @@ There are many libraries, so their headers may be grouped by topics:
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* [port] (@ref rte_port.h):
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[ethdev] (@ref rte_port_ethdev.h),
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[ring] (@ref rte_port_ring.h),
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[frag] (@ref rte_port_frag.h),
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- **basic**:
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[approx fraction] (@ref rte_approx.h),
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@ -44,11 +44,21 @@ CFLAGS += $(WERROR_FLAGS)
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#
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SRCS-$(CONFIG_RTE_LIBRTE_PORT) += rte_port_ethdev.c
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SRCS-$(CONFIG_RTE_LIBRTE_PORT) += rte_port_ring.c
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ifeq ($(CONFIG_RTE_LIBRTE_IP_FRAG),y)
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ifeq ($(CONFIG_RTE_MBUF_SCATTER_GATHER),y)
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SRCS-$(CONFIG_RTE_LIBRTE_PORT) += rte_port_frag.c
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endif
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endif
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# install includes
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SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port.h
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SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port_ethdev.h
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SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port_ring.h
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ifeq ($(CONFIG_RTE_LIBRTE_IP_FRAG),y)
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ifeq ($(CONFIG_RTE_MBUF_SCATTER_GATHER),y)
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SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port_frag.h
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endif
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endif
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# this lib depends upon:
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DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) := lib/librte_eal
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@ -56,5 +66,6 @@ DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_mbuf
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DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_mempool
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DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_malloc
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DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_ether
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DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_ip_frag
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include $(RTE_SDK)/mk/rte.lib.mk
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240
lib/librte_port/rte_port_frag.c
Normal file
240
lib/librte_port/rte_port_frag.c
Normal file
@ -0,0 +1,240 @@
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/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include <rte_ether.h>
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#include <rte_ip_frag.h>
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#include "rte_port_frag.h"
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/* Default byte size for the IPv4 Maximum Transfer Unit (MTU).
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* This value includes the size of IPv4 header. */
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#define IPV4_MTU_DEFAULT ETHER_MTU
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/* Max number of fragments per packet allowed */
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#define IPV4_MAX_FRAGS_PER_PACKET 0x80
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struct rte_port_ring_reader_ipv4_frag {
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/* Input parameters */
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struct rte_ring *ring;
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uint32_t mtu;
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uint32_t metadata_size;
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struct rte_mempool *pool_direct;
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struct rte_mempool *pool_indirect;
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/* Internal buffers */
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struct rte_mbuf *pkts[RTE_PORT_IN_BURST_SIZE_MAX];
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struct rte_mbuf *frags[IPV4_MAX_FRAGS_PER_PACKET];
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uint32_t n_pkts;
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uint32_t pos_pkts;
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uint32_t n_frags;
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uint32_t pos_frags;
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} __rte_cache_aligned;
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static void *
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rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id)
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{
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struct rte_port_ring_reader_ipv4_frag_params *conf =
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(struct rte_port_ring_reader_ipv4_frag_params *) params;
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struct rte_port_ring_reader_ipv4_frag *port;
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/* Check input parameters */
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if (conf == NULL) {
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RTE_LOG(ERR, PORT, "%s: Parameter conf is NULL\n", __func__);
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return NULL;
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}
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if (conf->ring == NULL) {
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RTE_LOG(ERR, PORT, "%s: Parameter ring is NULL\n", __func__);
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return NULL;
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}
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if (conf->mtu == 0) {
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RTE_LOG(ERR, PORT, "%s: Parameter mtu is invalid\n", __func__);
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return NULL;
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}
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if (conf->pool_direct == NULL) {
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RTE_LOG(ERR, PORT, "%s: Parameter pool_direct is NULL\n",
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__func__);
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return NULL;
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}
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if (conf->pool_indirect == NULL) {
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RTE_LOG(ERR, PORT, "%s: Parameter pool_indirect is NULL\n",
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__func__);
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return NULL;
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}
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/* Memory allocation */
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port = rte_zmalloc_socket("PORT", sizeof(*port), CACHE_LINE_SIZE,
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socket_id);
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if (port == NULL) {
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RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
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return NULL;
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}
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/* Initialization */
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port->ring = conf->ring;
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port->mtu = conf->mtu;
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port->metadata_size = conf->metadata_size;
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port->pool_direct = conf->pool_direct;
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port->pool_indirect = conf->pool_indirect;
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port->n_pkts = 0;
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port->pos_pkts = 0;
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port->n_frags = 0;
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port->pos_frags = 0;
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return port;
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}
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static int
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rte_port_ring_reader_ipv4_frag_rx(void *port,
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struct rte_mbuf **pkts,
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uint32_t n_pkts)
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{
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struct rte_port_ring_reader_ipv4_frag *p =
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(struct rte_port_ring_reader_ipv4_frag *) port;
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uint32_t n_pkts_out;
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n_pkts_out = 0;
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/* Get packets from the "frag" buffer */
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if (p->n_frags >= n_pkts) {
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memcpy(pkts, &p->frags[p->pos_frags], n_pkts * sizeof(void *));
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p->pos_frags += n_pkts;
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p->n_frags -= n_pkts;
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return n_pkts;
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}
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memcpy(pkts, &p->frags[p->pos_frags], p->n_frags * sizeof(void *));
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n_pkts_out = p->n_frags;
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p->n_frags = 0;
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/* Look to "pkts" buffer to get more packets */
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for ( ; ; ) {
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struct rte_mbuf *pkt;
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uint32_t n_pkts_to_provide, i;
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int status;
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/* If "pkts" buffer is empty, read packet burst from ring */
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if (p->n_pkts == 0) {
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p->n_pkts = rte_ring_sc_dequeue_burst(p->ring,
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(void **) p->pkts, RTE_PORT_IN_BURST_SIZE_MAX);
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if (p->n_pkts == 0)
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return n_pkts_out;
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p->pos_pkts = 0;
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}
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/* Read next packet from "pkts" buffer */
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pkt = p->pkts[p->pos_pkts++];
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p->n_pkts--;
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/* If not jumbo, pass current packet to output */
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if (pkt->pkt.pkt_len <= IPV4_MTU_DEFAULT) {
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pkts[n_pkts_out++] = pkt;
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n_pkts_to_provide = n_pkts - n_pkts_out;
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if (n_pkts_to_provide == 0)
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return n_pkts;
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continue;
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}
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/* Fragment current packet into the "frags" buffer */
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status = rte_ipv4_fragment_packet(
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pkt,
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p->frags,
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IPV4_MAX_FRAGS_PER_PACKET,
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p->mtu,
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p->pool_direct,
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p->pool_indirect
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);
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if (status < 0) {
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rte_pktmbuf_free(pkt);
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continue;
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}
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p->n_frags = (uint32_t) status;
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p->pos_frags = 0;
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/* Copy meta-data from input jumbo packet to its fragments */
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for (i = 0; i < p->n_frags; i++) {
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uint8_t *src = RTE_MBUF_METADATA_UINT8_PTR(pkt, 0);
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uint8_t *dst =
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RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], 0);
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memcpy(dst, src, p->metadata_size);
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}
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/* Free input jumbo packet */
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rte_pktmbuf_free(pkt);
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/* Get packets from "frag" buffer */
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n_pkts_to_provide = n_pkts - n_pkts_out;
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if (p->n_frags >= n_pkts_to_provide) {
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memcpy(&pkts[n_pkts_out], p->frags,
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n_pkts_to_provide * sizeof(void *));
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p->n_frags -= n_pkts_to_provide;
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p->pos_frags += n_pkts_to_provide;
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return n_pkts;
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}
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memcpy(&pkts[n_pkts_out], p->frags,
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p->n_frags * sizeof(void *));
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n_pkts_out += p->n_frags;
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p->n_frags = 0;
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}
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}
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static int
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rte_port_ring_reader_ipv4_frag_free(void *port)
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{
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if (port == NULL) {
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RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
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return -1;
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}
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rte_free(port);
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return 0;
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}
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/*
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* Summary of port operations
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*/
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struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops = {
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.f_create = rte_port_ring_reader_ipv4_frag_create,
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.f_free = rte_port_ring_reader_ipv4_frag_free,
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.f_rx = rte_port_ring_reader_ipv4_frag_rx,
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};
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94
lib/librte_port/rte_port_frag.h
Normal file
94
lib/librte_port/rte_port_frag.h
Normal file
@ -0,0 +1,94 @@
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/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__
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#define __INCLUDE_RTE_PORT_IP_FRAG_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @file
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* RTE Port for IPv4 Fragmentation
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*
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* This port is built on top of pre-initialized single consumer rte_ring. In
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* order to minimize the amount of packets stored in the ring at any given
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* time, the IP fragmentation functionality is executed on ring read operation,
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* hence this port is implemented as an input port. A regular ring_writer port
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* can be created to write to the same ring.
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*
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* The packets written to the ring are either complete IP datagrams or jumbo
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* frames (i.e. IP packets with length bigger than provided MTU value). The
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* packets read from the ring are all non-jumbo frames. The complete IP
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* datagrams written to the ring are not changed. The jumbo frames are
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* fragmented into several IP packets with length less or equal to MTU.
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*
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***/
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#include <stdint.h>
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#include <rte_ring.h>
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#include "rte_port.h"
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/** ring_reader_ipv4_frag port parameters */
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struct rte_port_ring_reader_ipv4_frag_params {
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/** Underlying single consumer ring that has to be pre-initialized. */
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struct rte_ring *ring;
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/** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */
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uint32_t mtu;
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/** Size of application dependent meta-data stored per each input packet
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that has to be copied to each of the fragments originating from the
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same input IP datagram. */
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uint32_t metadata_size;
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/** Pre-initialized buffer pool used for allocating direct buffers for
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the output fragments. */
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struct rte_mempool *pool_direct;
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/** Pre-initialized buffer pool used for allocating indirect buffers for
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the output fragments. */
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struct rte_mempool *pool_indirect;
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};
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/** ring_reader_ipv4_frag port operations */
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extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops;
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#ifdef __cplusplus
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}
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#endif
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#endif
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Reference in New Issue
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