From: Cristian Dumitrescu Date: Wed, 4 Jun 2014 18:08:22 +0000 (+0100) Subject: port: IPv4 fragmentation X-Git-Tag: spdx-start~10698 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=9ec4f0900be6f126b358f379b938ce324650003b;p=dpdk.git port: IPv4 fragmentation This port presents the IPv4 fragmentation operation as a Packet Framework port. Signed-off-by: Cristian Dumitrescu Acked-by: Pablo de Lara Guarch Acked by: Ivan Boule [Thomas: update to new ip_frag library] Signed-off-by: Thomas Monjalon --- diff --git a/doc/doxy-api-index.md b/doc/doxy-api-index.md index 80f3277ae2..4b7c2a2380 100644 --- a/doc/doxy-api-index.md +++ b/doc/doxy-api-index.md @@ -104,6 +104,7 @@ There are many libraries, so their headers may be grouped by topics: * [port] (@ref rte_port.h): [ethdev] (@ref rte_port_ethdev.h), [ring] (@ref rte_port_ring.h), + [frag] (@ref rte_port_frag.h), - **basic**: [approx fraction] (@ref rte_approx.h), diff --git a/lib/librte_port/Makefile b/lib/librte_port/Makefile index 01eead91bc..d31bed3d5c 100644 --- a/lib/librte_port/Makefile +++ b/lib/librte_port/Makefile @@ -44,11 +44,21 @@ CFLAGS += $(WERROR_FLAGS) # SRCS-$(CONFIG_RTE_LIBRTE_PORT) += rte_port_ethdev.c SRCS-$(CONFIG_RTE_LIBRTE_PORT) += rte_port_ring.c +ifeq ($(CONFIG_RTE_LIBRTE_IP_FRAG),y) +ifeq ($(CONFIG_RTE_MBUF_SCATTER_GATHER),y) +SRCS-$(CONFIG_RTE_LIBRTE_PORT) += rte_port_frag.c +endif +endif # install includes SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port.h SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port_ethdev.h SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port_ring.h +ifeq ($(CONFIG_RTE_LIBRTE_IP_FRAG),y) +ifeq ($(CONFIG_RTE_MBUF_SCATTER_GATHER),y) +SYMLINK-$(CONFIG_RTE_LIBRTE_PORT)-include += rte_port_frag.h +endif +endif # this lib depends upon: DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) := lib/librte_eal @@ -56,5 +66,6 @@ DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_mbuf DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_mempool DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_malloc DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_ether +DEPDIRS-$(CONFIG_RTE_LIBRTE_PORT) += lib/librte_ip_frag include $(RTE_SDK)/mk/rte.lib.mk diff --git a/lib/librte_port/rte_port_frag.c b/lib/librte_port/rte_port_frag.c new file mode 100644 index 0000000000..ce5026fc1c --- /dev/null +++ b/lib/librte_port/rte_port_frag.c @@ -0,0 +1,240 @@ +/*- + * 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 + +#include +#include + +#include "rte_port_frag.h" + +/* Default byte size for the IPv4 Maximum Transfer Unit (MTU). + * This value includes the size of IPv4 header. */ +#define IPV4_MTU_DEFAULT ETHER_MTU + +/* Max number of fragments per packet allowed */ +#define IPV4_MAX_FRAGS_PER_PACKET 0x80 + +struct rte_port_ring_reader_ipv4_frag { + /* Input parameters */ + struct rte_ring *ring; + uint32_t mtu; + uint32_t metadata_size; + struct rte_mempool *pool_direct; + struct rte_mempool *pool_indirect; + + /* Internal buffers */ + struct rte_mbuf *pkts[RTE_PORT_IN_BURST_SIZE_MAX]; + struct rte_mbuf *frags[IPV4_MAX_FRAGS_PER_PACKET]; + uint32_t n_pkts; + uint32_t pos_pkts; + uint32_t n_frags; + uint32_t pos_frags; +} __rte_cache_aligned; + +static void * +rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id) +{ + struct rte_port_ring_reader_ipv4_frag_params *conf = + (struct rte_port_ring_reader_ipv4_frag_params *) params; + struct rte_port_ring_reader_ipv4_frag *port; + + /* Check input parameters */ + if (conf == NULL) { + RTE_LOG(ERR, PORT, "%s: Parameter conf is NULL\n", __func__); + return NULL; + } + if (conf->ring == NULL) { + RTE_LOG(ERR, PORT, "%s: Parameter ring is NULL\n", __func__); + return NULL; + } + if (conf->mtu == 0) { + RTE_LOG(ERR, PORT, "%s: Parameter mtu is invalid\n", __func__); + return NULL; + } + if (conf->pool_direct == NULL) { + RTE_LOG(ERR, PORT, "%s: Parameter pool_direct is NULL\n", + __func__); + return NULL; + } + if (conf->pool_indirect == NULL) { + RTE_LOG(ERR, PORT, "%s: Parameter pool_indirect is NULL\n", + __func__); + return NULL; + } + + /* Memory allocation */ + port = rte_zmalloc_socket("PORT", sizeof(*port), CACHE_LINE_SIZE, + socket_id); + if (port == NULL) { + RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__); + return NULL; + } + + /* Initialization */ + port->ring = conf->ring; + port->mtu = conf->mtu; + port->metadata_size = conf->metadata_size; + port->pool_direct = conf->pool_direct; + port->pool_indirect = conf->pool_indirect; + + port->n_pkts = 0; + port->pos_pkts = 0; + port->n_frags = 0; + port->pos_frags = 0; + + return port; +} + +static int +rte_port_ring_reader_ipv4_frag_rx(void *port, + struct rte_mbuf **pkts, + uint32_t n_pkts) +{ + struct rte_port_ring_reader_ipv4_frag *p = + (struct rte_port_ring_reader_ipv4_frag *) port; + uint32_t n_pkts_out; + + n_pkts_out = 0; + + /* Get packets from the "frag" buffer */ + if (p->n_frags >= n_pkts) { + memcpy(pkts, &p->frags[p->pos_frags], n_pkts * sizeof(void *)); + p->pos_frags += n_pkts; + p->n_frags -= n_pkts; + + return n_pkts; + } + + memcpy(pkts, &p->frags[p->pos_frags], p->n_frags * sizeof(void *)); + n_pkts_out = p->n_frags; + p->n_frags = 0; + + /* Look to "pkts" buffer to get more packets */ + for ( ; ; ) { + struct rte_mbuf *pkt; + uint32_t n_pkts_to_provide, i; + int status; + + /* If "pkts" buffer is empty, read packet burst from ring */ + if (p->n_pkts == 0) { + p->n_pkts = rte_ring_sc_dequeue_burst(p->ring, + (void **) p->pkts, RTE_PORT_IN_BURST_SIZE_MAX); + if (p->n_pkts == 0) + return n_pkts_out; + p->pos_pkts = 0; + } + + /* Read next packet from "pkts" buffer */ + pkt = p->pkts[p->pos_pkts++]; + p->n_pkts--; + + /* If not jumbo, pass current packet to output */ + if (pkt->pkt.pkt_len <= IPV4_MTU_DEFAULT) { + pkts[n_pkts_out++] = pkt; + + n_pkts_to_provide = n_pkts - n_pkts_out; + if (n_pkts_to_provide == 0) + return n_pkts; + + continue; + } + + /* Fragment current packet into the "frags" buffer */ + status = rte_ipv4_fragment_packet( + pkt, + p->frags, + IPV4_MAX_FRAGS_PER_PACKET, + p->mtu, + p->pool_direct, + p->pool_indirect + ); + + if (status < 0) { + rte_pktmbuf_free(pkt); + continue; + } + + p->n_frags = (uint32_t) status; + p->pos_frags = 0; + + /* Copy meta-data from input jumbo packet to its fragments */ + for (i = 0; i < p->n_frags; i++) { + uint8_t *src = RTE_MBUF_METADATA_UINT8_PTR(pkt, 0); + uint8_t *dst = + RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], 0); + + memcpy(dst, src, p->metadata_size); + } + + /* Free input jumbo packet */ + rte_pktmbuf_free(pkt); + + /* Get packets from "frag" buffer */ + n_pkts_to_provide = n_pkts - n_pkts_out; + if (p->n_frags >= n_pkts_to_provide) { + memcpy(&pkts[n_pkts_out], p->frags, + n_pkts_to_provide * sizeof(void *)); + p->n_frags -= n_pkts_to_provide; + p->pos_frags += n_pkts_to_provide; + + return n_pkts; + } + + memcpy(&pkts[n_pkts_out], p->frags, + p->n_frags * sizeof(void *)); + n_pkts_out += p->n_frags; + p->n_frags = 0; + } +} + +static int +rte_port_ring_reader_ipv4_frag_free(void *port) +{ + if (port == NULL) { + RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__); + return -1; + } + + rte_free(port); + + return 0; +} + +/* + * Summary of port operations + */ +struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops = { + .f_create = rte_port_ring_reader_ipv4_frag_create, + .f_free = rte_port_ring_reader_ipv4_frag_free, + .f_rx = rte_port_ring_reader_ipv4_frag_rx, +}; diff --git a/lib/librte_port/rte_port_frag.h b/lib/librte_port/rte_port_frag.h new file mode 100644 index 0000000000..dfd70c0115 --- /dev/null +++ b/lib/librte_port/rte_port_frag.h @@ -0,0 +1,94 @@ +/*- + * 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. + */ + +#ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__ +#define __INCLUDE_RTE_PORT_IP_FRAG_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @file + * RTE Port for IPv4 Fragmentation + * + * This port is built on top of pre-initialized single consumer rte_ring. In + * order to minimize the amount of packets stored in the ring at any given + * time, the IP fragmentation functionality is executed on ring read operation, + * hence this port is implemented as an input port. A regular ring_writer port + * can be created to write to the same ring. + * + * The packets written to the ring are either complete IP datagrams or jumbo + * frames (i.e. IP packets with length bigger than provided MTU value). The + * packets read from the ring are all non-jumbo frames. The complete IP + * datagrams written to the ring are not changed. The jumbo frames are + * fragmented into several IP packets with length less or equal to MTU. + * + ***/ + +#include + +#include + +#include "rte_port.h" + +/** ring_reader_ipv4_frag port parameters */ +struct rte_port_ring_reader_ipv4_frag_params { + /** Underlying single consumer ring that has to be pre-initialized. */ + struct rte_ring *ring; + + /** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */ + uint32_t mtu; + + /** Size of application dependent meta-data stored per each input packet + that has to be copied to each of the fragments originating from the + same input IP datagram. */ + uint32_t metadata_size; + + /** Pre-initialized buffer pool used for allocating direct buffers for + the output fragments. */ + struct rte_mempool *pool_direct; + + /** Pre-initialized buffer pool used for allocating indirect buffers for + the output fragments. */ + struct rte_mempool *pool_indirect; +}; + +/** ring_reader_ipv4_frag port operations */ +extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops; + +#ifdef __cplusplus +} +#endif + +#endif