diff options
Diffstat (limited to 'src/dpdk22/lib/librte_mbuf')
| -rw-r--r-- | src/dpdk22/lib/librte_mbuf/rte_mbuf.c | 288 | ||||
| -rw-r--r-- | src/dpdk22/lib/librte_mbuf/rte_mbuf.h | 1868 |
2 files changed, 0 insertions, 2156 deletions
diff --git a/src/dpdk22/lib/librte_mbuf/rte_mbuf.c b/src/dpdk22/lib/librte_mbuf/rte_mbuf.c deleted file mode 100644 index c18b4381..00000000 --- a/src/dpdk22/lib/librte_mbuf/rte_mbuf.c +++ /dev/null @@ -1,288 +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_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> -#include <rte_errno.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 *user_mbp_priv, *mbp_priv; - struct rte_pktmbuf_pool_private default_mbp_priv; - uint16_t roomsz; - - RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf)); - - /* if no structure is provided, assume no mbuf private area */ - user_mbp_priv = opaque_arg; - if (user_mbp_priv == NULL) { - default_mbp_priv.mbuf_priv_size = 0; - if (mp->elt_size > sizeof(struct rte_mbuf)) - roomsz = mp->elt_size - sizeof(struct rte_mbuf); - else - roomsz = 0; - default_mbp_priv.mbuf_data_room_size = roomsz; - user_mbp_priv = &default_mbp_priv; - } - - RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf) + - user_mbp_priv->mbuf_data_room_size + - user_mbp_priv->mbuf_priv_size); - - mbp_priv = rte_mempool_get_priv(mp); - memcpy(mbp_priv, user_mbp_priv, sizeof(*mbp_priv)); -} - -/* - * 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 mbuf_size, buf_len, priv_size; - - priv_size = rte_pktmbuf_priv_size(mp); - mbuf_size = sizeof(struct rte_mbuf) + priv_size; - buf_len = rte_pktmbuf_data_room_size(mp); - - RTE_MBUF_ASSERT(RTE_ALIGN(priv_size, RTE_MBUF_PRIV_ALIGN) == priv_size); - RTE_MBUF_ASSERT(mp->elt_size >= mbuf_size); - RTE_MBUF_ASSERT(buf_len <= UINT16_MAX); - - memset(m, 0, mp->elt_size); - - /* start of buffer is after mbuf structure and priv data */ - m->priv_size = priv_size; - m->buf_addr = (char *)m + mbuf_size; - m->buf_physaddr = rte_mempool_virt2phy(mp, m) + mbuf_size; - 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; -} - -/* helper to create a mbuf pool */ -struct rte_mempool * -rte_pktmbuf_pool_create(const char *name, unsigned n, - unsigned cache_size, uint16_t priv_size, uint16_t data_room_size, - int socket_id) -{ - struct rte_pktmbuf_pool_private mbp_priv; - unsigned elt_size; - - if (RTE_ALIGN(priv_size, RTE_MBUF_PRIV_ALIGN) != priv_size) { - RTE_LOG(ERR, MBUF, "mbuf priv_size=%u is not aligned\n", - priv_size); - rte_errno = EINVAL; - return NULL; - } - elt_size = sizeof(struct rte_mbuf) + (unsigned)priv_size + - (unsigned)data_room_size; - mbp_priv.mbuf_data_room_size = data_room_size; - mbp_priv.mbuf_priv_size = priv_size; - - return rte_mempool_create(name, n, elt_size, - cache_size, sizeof(struct rte_pktmbuf_pool_private), - rte_pktmbuf_pool_init, &mbp_priv, rte_pktmbuf_init, NULL, - socket_id, 0); -} - -/* 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"); - - uint16_t cnt = rte_mbuf_refcnt_read(m); - if ((cnt == 0) || (cnt == UINT16_MAX)) - rte_panic("bad ref cnt\n"); - - /* 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_IEEE1588_PTP: return "PKT_RX_IEEE1588_PTP"; - case PKT_RX_IEEE1588_TMST: return "PKT_RX_IEEE1588_TMST"; - 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_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/src/dpdk22/lib/librte_mbuf/rte_mbuf.h b/src/dpdk22/lib/librte_mbuf/rte_mbuf.h deleted file mode 100644 index 683b2ef3..00000000 --- a/src/dpdk22/lib/librte_mbuf/rte_mbuf.h +++ /dev/null @@ -1,1868 +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_common.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 options */ -#pragma GCC poison RTE_MBUF_SCATTER_GATHER -#pragma GCC poison RTE_MBUF_REFCNT - -/* - * 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 3 bits are reserved for generic mbuf flags - * - TX flags therefore start at bit position 60 (i.e. 63-3), and new flags get - * added to the right of the previously defined flags i.e. they should count - * downwards, not upwards. - * - * 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_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_FDIR_ID (1ULL << 13) /**< FD id reported if FDIR match. */ -#define PKT_RX_FDIR_FLX (1ULL << 14) /**< Flexible bytes reported if FDIR match. */ -#define PKT_RX_QINQ_PKT (1ULL << 15) /**< RX packet with double VLAN stripped. */ -/* add new RX flags here */ - -/* add new TX flags here */ - -/** - * Second VLAN insertion (QinQ) flag. - */ -#define PKT_TX_QINQ_PKT (1ULL << 49) /**< TX packet with double VLAN inserted. */ - -/** - * 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 << 50) - -#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. */ - -/** - * Offload the IP checksum in the hardware. The flag PKT_TX_IPV4 should - * also be set by the application, although a PMD will only check - * PKT_TX_IP_CKSUM. - * - set the IP checksum field in the packet to 0 - * - fill the mbuf offload information: l2_len, l3_len - */ -#define PKT_TX_IP_CKSUM (1ULL << 54) - -/** - * Packet is IPv4. This flag must be set when using any offload feature - * (TSO, L3 or L4 checksum) to tell the NIC that the packet is an IPv4 - * packet. If the packet is a tunneled packet, this flag is related to - * the inner headers. - */ -#define PKT_TX_IPV4 (1ULL << 55) - -/** - * Packet is IPv6. This flag must be set when using an offload feature - * (TSO or L4 checksum) to tell the NIC that the packet is an IPv6 - * packet. If the packet is a tunneled packet, this flag is related to - * the inner headers. - */ -#define PKT_TX_IPV6 (1ULL << 56) - -#define PKT_TX_VLAN_PKT (1ULL << 57) /**< TX packet is a 802.1q VLAN packet. */ - -/** - * Offload the IP checksum of an external header in the hardware. The - * flag PKT_TX_OUTER_IPV4 should also be set by the application, alto ugh - * a PMD will only check PKT_TX_IP_CKSUM. The IP checksum field in the - * packet must be set to 0. - * - set the outer IP checksum field in the packet to 0 - * - fill the mbuf offload information: outer_l2_len, outer_l3_len - */ -#define PKT_TX_OUTER_IP_CKSUM (1ULL << 58) - -/** - * Packet outer header is IPv4. This flag must be set when using any - * outer offload feature (L3 or L4 checksum) to tell the NIC that the - * outer header of the tunneled packet is an IPv4 packet. - */ -#define PKT_TX_OUTER_IPV4 (1ULL << 59) - -/** - * Packet outer header is IPv6. This flag must be set when using any - * outer offload feature (L4 checksum) to tell the NIC that the outer - * header of the tunneled packet is an IPv6 packet. - */ -#define PKT_TX_OUTER_IPV6 (1ULL << 60) - -#define __RESERVED (1ULL << 61) /**< reserved for future mbuf use */ - -#define IND_ATTACHED_MBUF (1ULL << 62) /**< Indirect attached mbuf */ - -/* Use final bit of flags to indicate a control mbuf */ -#define CTRL_MBUF_FLAG (1ULL << 63) /**< Mbuf contains control data */ - -/* - * 32 bits are divided into several fields to mark packet types. Note that - * each field is indexical. - * - Bit 3:0 is for L2 types. - * - Bit 7:4 is for L3 or outer L3 (for tunneling case) types. - * - Bit 11:8 is for L4 or outer L4 (for tunneling case) types. - * - Bit 15:12 is for tunnel types. - * - Bit 19:16 is for inner L2 types. - * - Bit 23:20 is for inner L3 types. - * - Bit 27:24 is for inner L4 types. - * - Bit 31:28 is reserved. - * - * To be compatible with Vector PMD, RTE_PTYPE_L3_IPV4, RTE_PTYPE_L3_IPV4_EXT, - * RTE_PTYPE_L3_IPV6, RTE_PTYPE_L3_IPV6_EXT, RTE_PTYPE_L4_TCP, RTE_PTYPE_L4_UDP - * and RTE_PTYPE_L4_SCTP should be kept as below in a contiguous 7 bits. - * - * Note that L3 types values are selected for checking IPV4/IPV6 header from - * performance point of view. Reading annotations of RTE_ETH_IS_IPV4_HDR and - * RTE_ETH_IS_IPV6_HDR is needed for any future changes of L3 type values. - * - * Note that the packet types of the same packet recognized by different - * hardware may be different, as different hardware may have different - * capability of packet type recognition. - * - * examples: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=0x29 - * | 'version'=6, 'next header'=0x3A - * | 'ICMPv6 header'> - * will be recognized on i40e hardware as packet type combination of, - * RTE_PTYPE_L2_ETHER | - * RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | - * RTE_PTYPE_TUNNEL_IP | - * RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN | - * RTE_PTYPE_INNER_L4_ICMP. - * - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=0x2F - * | 'GRE header' - * | 'version'=6, 'next header'=0x11 - * | 'UDP header'> - * will be recognized on i40e hardware as packet type combination of, - * RTE_PTYPE_L2_ETHER | - * RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | - * RTE_PTYPE_TUNNEL_GRENAT | - * RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN | - * RTE_PTYPE_INNER_L4_UDP. - */ -#define RTE_PTYPE_UNKNOWN 0x00000000 -/** - * Ethernet packet type. - * It is used for outer packet for tunneling cases. - * - * Packet format: - * <'ether type'=[0x0800|0x86DD]> - */ -#define RTE_PTYPE_L2_ETHER 0x00000001 -/** - * Ethernet packet type for time sync. - * - * Packet format: - * <'ether type'=0x88F7> - */ -#define RTE_PTYPE_L2_ETHER_TIMESYNC 0x00000002 -/** - * ARP (Address Resolution Protocol) packet type. - * - * Packet format: - * <'ether type'=0x0806> - */ -#define RTE_PTYPE_L2_ETHER_ARP 0x00000003 -/** - * LLDP (Link Layer Discovery Protocol) packet type. - * - * Packet format: - * <'ether type'=0x88CC> - */ -#define RTE_PTYPE_L2_ETHER_LLDP 0x00000004 -/** - * Mask of layer 2 packet types. - * It is used for outer packet for tunneling cases. - */ -#define RTE_PTYPE_L2_MASK 0x0000000f -/** - * IP (Internet Protocol) version 4 packet type. - * It is used for outer packet for tunneling cases, and does not contain any - * header option. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'ihl'=5> - */ -#define RTE_PTYPE_L3_IPV4 0x00000010 -/** - * IP (Internet Protocol) version 4 packet type. - * It is used for outer packet for tunneling cases, and contains header - * options. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'ihl'=[6-15], 'options'> - */ -#define RTE_PTYPE_L3_IPV4_EXT 0x00000030 -/** - * IP (Internet Protocol) version 6 packet type. - * It is used for outer packet for tunneling cases, and does not contain any - * extension header. - * - * Packet format: - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=0x3B> - */ -#define RTE_PTYPE_L3_IPV6 0x00000040 -/** - * IP (Internet Protocol) version 4 packet type. - * It is used for outer packet for tunneling cases, and may or maynot contain - * header options. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'ihl'=[5-15], <'options'>> - */ -#define RTE_PTYPE_L3_IPV4_EXT_UNKNOWN 0x00000090 -/** - * IP (Internet Protocol) version 6 packet type. - * It is used for outer packet for tunneling cases, and contains extension - * headers. - * - * Packet format: - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=[0x0|0x2B|0x2C|0x32|0x33|0x3C|0x87], - * 'extension headers'> - */ -#define RTE_PTYPE_L3_IPV6_EXT 0x000000c0 -/** - * IP (Internet Protocol) version 6 packet type. - * It is used for outer packet for tunneling cases, and may or maynot contain - * extension headers. - * - * Packet format: - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=[0x3B|0x0|0x2B|0x2C|0x32|0x33|0x3C|0x87], - * <'extension headers'>> - */ -#define RTE_PTYPE_L3_IPV6_EXT_UNKNOWN 0x000000e0 -/** - * Mask of layer 3 packet types. - * It is used for outer packet for tunneling cases. - */ -#define RTE_PTYPE_L3_MASK 0x000000f0 -/** - * TCP (Transmission Control Protocol) packet type. - * It is used for outer packet for tunneling cases. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=6, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=6> - */ -#define RTE_PTYPE_L4_TCP 0x00000100 -/** - * UDP (User Datagram Protocol) packet type. - * It is used for outer packet for tunneling cases. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=17, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=17> - */ -#define RTE_PTYPE_L4_UDP 0x00000200 -/** - * Fragmented IP (Internet Protocol) packet type. - * It is used for outer packet for tunneling cases. - * - * It refers to those packets of any IP types, which can be recognized as - * fragmented. A fragmented packet cannot be recognized as any other L4 types - * (RTE_PTYPE_L4_TCP, RTE_PTYPE_L4_UDP, RTE_PTYPE_L4_SCTP, RTE_PTYPE_L4_ICMP, - * RTE_PTYPE_L4_NONFRAG). - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'MF'=1> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=44> - */ -#define RTE_PTYPE_L4_FRAG 0x00000300 -/** - * SCTP (Stream Control Transmission Protocol) packet type. - * It is used for outer packet for tunneling cases. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=132, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=132> - */ -#define RTE_PTYPE_L4_SCTP 0x00000400 -/** - * ICMP (Internet Control Message Protocol) packet type. - * It is used for outer packet for tunneling cases. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=1, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=1> - */ -#define RTE_PTYPE_L4_ICMP 0x00000500 -/** - * Non-fragmented IP (Internet Protocol) packet type. - * It is used for outer packet for tunneling cases. - * - * It refers to those packets of any IP types, while cannot be recognized as - * any of above L4 types (RTE_PTYPE_L4_TCP, RTE_PTYPE_L4_UDP, - * RTE_PTYPE_L4_FRAG, RTE_PTYPE_L4_SCTP, RTE_PTYPE_L4_ICMP). - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'!=[6|17|132|1], 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'!=[6|17|44|132|1]> - */ -#define RTE_PTYPE_L4_NONFRAG 0x00000600 -/** - * Mask of layer 4 packet types. - * It is used for outer packet for tunneling cases. - */ -#define RTE_PTYPE_L4_MASK 0x00000f00 -/** - * IP (Internet Protocol) in IP (Internet Protocol) tunneling packet type. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=[4|41]> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=[4|41]> - */ -#define RTE_PTYPE_TUNNEL_IP 0x00001000 -/** - * GRE (Generic Routing Encapsulation) tunneling packet type. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=47> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=47> - */ -#define RTE_PTYPE_TUNNEL_GRE 0x00002000 -/** - * VXLAN (Virtual eXtensible Local Area Network) tunneling packet type. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=17 - * | 'destination port'=4798> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=17 - * | 'destination port'=4798> - */ -#define RTE_PTYPE_TUNNEL_VXLAN 0x00003000 -/** - * NVGRE (Network Virtualization using Generic Routing Encapsulation) tunneling - * packet type. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=47 - * | 'protocol type'=0x6558> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=47 - * | 'protocol type'=0x6558'> - */ -#define RTE_PTYPE_TUNNEL_NVGRE 0x00004000 -/** - * GENEVE (Generic Network Virtualization Encapsulation) tunneling packet type. - * - * Packet format: - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=17 - * | 'destination port'=6081> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=17 - * | 'destination port'=6081> - */ -#define RTE_PTYPE_TUNNEL_GENEVE 0x00005000 -/** - * Tunneling packet type of Teredo, VXLAN (Virtual eXtensible Local Area - * Network) or GRE (Generic Routing Encapsulation) could be recognized as this - * packet type, if they can not be recognized independently as of hardware - * capability. - */ -#define RTE_PTYPE_TUNNEL_GRENAT 0x00006000 -/** - * Mask of tunneling packet types. - */ -#define RTE_PTYPE_TUNNEL_MASK 0x0000f000 -/** - * Ethernet packet type. - * It is used for inner packet type only. - * - * Packet format (inner only): - * <'ether type'=[0x800|0x86DD]> - */ -#define RTE_PTYPE_INNER_L2_ETHER 0x00010000 -/** - * Ethernet packet type with VLAN (Virtual Local Area Network) tag. - * - * Packet format (inner only): - * <'ether type'=[0x800|0x86DD], vlan=[1-4095]> - */ -#define RTE_PTYPE_INNER_L2_ETHER_VLAN 0x00020000 -/** - * Mask of inner layer 2 packet types. - */ -#define RTE_PTYPE_INNER_L2_MASK 0x000f0000 -/** - * IP (Internet Protocol) version 4 packet type. - * It is used for inner packet only, and does not contain any header option. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'ihl'=5> - */ -#define RTE_PTYPE_INNER_L3_IPV4 0x00100000 -/** - * IP (Internet Protocol) version 4 packet type. - * It is used for inner packet only, and contains header options. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'ihl'=[6-15], 'options'> - */ -#define RTE_PTYPE_INNER_L3_IPV4_EXT 0x00200000 -/** - * IP (Internet Protocol) version 6 packet type. - * It is used for inner packet only, and does not contain any extension header. - * - * Packet format (inner only): - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=0x3B> - */ -#define RTE_PTYPE_INNER_L3_IPV6 0x00300000 -/** - * IP (Internet Protocol) version 4 packet type. - * It is used for inner packet only, and may or maynot contain header options. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'ihl'=[5-15], <'options'>> - */ -#define RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN 0x00400000 -/** - * IP (Internet Protocol) version 6 packet type. - * It is used for inner packet only, and contains extension headers. - * - * Packet format (inner only): - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=[0x0|0x2B|0x2C|0x32|0x33|0x3C|0x87], - * 'extension headers'> - */ -#define RTE_PTYPE_INNER_L3_IPV6_EXT 0x00500000 -/** - * IP (Internet Protocol) version 6 packet type. - * It is used for inner packet only, and may or maynot contain extension - * headers. - * - * Packet format (inner only): - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=[0x3B|0x0|0x2B|0x2C|0x32|0x33|0x3C|0x87], - * <'extension headers'>> - */ -#define RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN 0x00600000 -/** - * Mask of inner layer 3 packet types. - */ -#define RTE_PTYPE_INNER_L3_MASK 0x00f00000 -/** - * TCP (Transmission Control Protocol) packet type. - * It is used for inner packet only. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=6, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=6> - */ -#define RTE_PTYPE_INNER_L4_TCP 0x01000000 -/** - * UDP (User Datagram Protocol) packet type. - * It is used for inner packet only. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=17, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=17> - */ -#define RTE_PTYPE_INNER_L4_UDP 0x02000000 -/** - * Fragmented IP (Internet Protocol) packet type. - * It is used for inner packet only, and may or maynot have layer 4 packet. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'MF'=1> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=44> - */ -#define RTE_PTYPE_INNER_L4_FRAG 0x03000000 -/** - * SCTP (Stream Control Transmission Protocol) packet type. - * It is used for inner packet only. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=132, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=132> - */ -#define RTE_PTYPE_INNER_L4_SCTP 0x04000000 -/** - * ICMP (Internet Control Message Protocol) packet type. - * It is used for inner packet only. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'=1, 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'=1> - */ -#define RTE_PTYPE_INNER_L4_ICMP 0x05000000 -/** - * Non-fragmented IP (Internet Protocol) packet type. - * It is used for inner packet only, and may or maynot have other unknown layer - * 4 packet types. - * - * Packet format (inner only): - * <'ether type'=0x0800 - * | 'version'=4, 'protocol'!=[6|17|132|1], 'MF'=0> - * or, - * <'ether type'=0x86DD - * | 'version'=6, 'next header'!=[6|17|44|132|1]> - */ -#define RTE_PTYPE_INNER_L4_NONFRAG 0x06000000 -/** - * Mask of inner layer 4 packet types. - */ -#define RTE_PTYPE_INNER_L4_MASK 0x0f000000 - -/** - * Check if the (outer) L3 header is IPv4. To avoid comparing IPv4 types one by - * one, bit 4 is selected to be used for IPv4 only. Then checking bit 4 can - * determine if it is an IPV4 packet. - */ -#define RTE_ETH_IS_IPV4_HDR(ptype) ((ptype) & RTE_PTYPE_L3_IPV4) - -/** - * Check if the (outer) L3 header is IPv4. To avoid comparing IPv4 types one by - * one, bit 6 is selected to be used for IPv4 only. Then checking bit 6 can - * determine if it is an IPV4 packet. - */ -#define RTE_ETH_IS_IPV6_HDR(ptype) ((ptype) & RTE_PTYPE_L3_IPV6) - -/* Check if it is a tunneling packet */ -#define RTE_ETH_IS_TUNNEL_PKT(ptype) ((ptype) & (RTE_PTYPE_TUNNEL_MASK | \ - RTE_PTYPE_INNER_L2_MASK | \ - RTE_PTYPE_INNER_L3_MASK | \ - RTE_PTYPE_INNER_L4_MASK)) - -/** Alignment constraint of mbuf private area. */ -#define RTE_MBUF_PRIV_ALIGN 8 - -/** - * 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); - -/** - * Some NICs need at least 2KB buffer to RX standard Ethernet frame without - * splitting it into multiple segments. - * So, for mbufs that planned to be involved into RX/TX, the recommended - * minimal buffer length is 2KB + RTE_PKTMBUF_HEADROOM. - */ -#define RTE_MBUF_DEFAULT_DATAROOM 2048 -#define RTE_MBUF_DEFAULT_BUF_SIZE \ - (RTE_MBUF_DEFAULT_DATAROOM + RTE_PKTMBUF_HEADROOM) - -/* 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 */ - -/** Opaque rte_mbuf_offload structure declarations */ -struct rte_mbuf_offload; - -/** - * 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 { - rte_atomic16_t refcnt_atomic; /**< Atomically accessed refcnt */ - uint16_t refcnt; /**< Non-atomically accessed refcnt */ - }; - 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 the combination of outer/inner L2, L3, L4 - * and tunnel types. - */ - union { - uint32_t packet_type; /**< L2/L3/L4 and tunnel information. */ - struct { - uint32_t l2_type:4; /**< (Outer) L2 type. */ - uint32_t l3_type:4; /**< (Outer) L3 type. */ - uint32_t l4_type:4; /**< (Outer) L4 type. */ - uint32_t tun_type:4; /**< Tunnel type. */ - uint32_t inner_l2_type:4; /**< Inner L2 type. */ - uint32_t inner_l3_type:4; /**< Inner L3 type. */ - uint32_t inner_l4_type:4; /**< Inner L4 type. */ - }; - }; - - uint32_t pkt_len; /**< Total pkt len: sum of all segments. */ - uint16_t data_len; /**< Amount of data in segment buffer. */ - uint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order) */ - - 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 */ - struct { - uint32_t lo; - uint32_t hi; - } sched; /**< Hierarchical scheduler */ - uint32_t usr; /**< User defined tags. See rte_distributor_process() */ - } hash; /**< hash information */ - - uint32_t seqn; /**< Sequence number. See also rte_reorder_insert() */ - - uint16_t vlan_tci_outer; /**< Outer VLAN Tag Control Identifier (CPU order) */ - - /* 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; */ - }; - }; - - /** Size of the application private data. In case of an indirect - * mbuf, it stores the direct mbuf private data size. */ - uint16_t priv_size; - - /** Timesync flags for use with IEEE1588. */ - uint16_t timesync; - - /* Chain of off-load operations to perform on mbuf */ - struct rte_mbuf_offload *offload_ops; -} __rte_cache_aligned; - -static inline uint16_t rte_pktmbuf_priv_size(struct rte_mempool *mp); - -/** - * Return the mbuf owning the data buffer address of an indirect mbuf. - * - * @param mi - * The pointer to the indirect mbuf. - * @return - * The address of the direct mbuf corresponding to buffer_addr. - */ -static inline struct rte_mbuf * -rte_mbuf_from_indirect(struct rte_mbuf *mi) -{ - return (struct rte_mbuf *)RTE_PTR_SUB(mi->buf_addr, sizeof(*mi) + mi->priv_size); -} - -/** - * Return the buffer address embedded in the given mbuf. - * - * @param md - * The pointer to the mbuf. - * @return - * The address of the data buffer owned by the mbuf. - */ -static inline char * -rte_mbuf_to_baddr(struct rte_mbuf *md) -{ - char *buffer_addr; - buffer_addr = (char *)md + sizeof(*md) + rte_pktmbuf_priv_size(md->pool); - return buffer_addr; -} - -/** - * Returns TRUE if given mbuf is indirect, or FALSE otherwise. - */ -#define RTE_MBUF_INDIRECT(mb) ((mb)->ol_flags & IND_ATTACHED_MBUF) - -/** - * Returns TRUE if given mbuf is direct, or FALSE otherwise. - */ -#define RTE_MBUF_DIRECT(mb) (!RTE_MBUF_INDIRECT(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. */ - uint16_t mbuf_priv_size; /**< Size of private area 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_ATOMIC - -/** - * 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); -} - -/** - * 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) -{ - // TREX_PATCH - The code in #if 0 caused tx queue to hang when running: - // sudo ./t-rex-64-o -f avl/sfr_delay_10_1g_no_bundeling.yaml -m 35 -p -d 100 -#if 0 - /* - * The atomic_add is an expensive operation, so we don't want to - * call it in the case where we know we are the uniq holder of - * this mbuf (i.e. ref_cnt == 1). Otherwise, an atomic - * operation has to be used because concurrent accesses on the - * reference counter can occur. - */ - if (likely(rte_mbuf_refcnt_read(m) == 1)) { - rte_mbuf_refcnt_set(m, 1 + value); - return 1 + value; - } -#endif - return (uint16_t)(rte_atomic16_add_return(&m->refcnt_atomic, 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) - - -/** - * 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; - RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0); - rte_mbuf_refcnt_set(m, 1); - 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) -{ - RTE_MBUF_ASSERT(rte_mbuf_refcnt_read(m) == 0); - 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); - -/** - * Create a mbuf pool. - * - * This function creates and initializes a packet mbuf pool. It is - * a wrapper to rte_mempool_create() with the proper packet constructor - * and mempool constructor. - * - * @param name - * The name of the mbuf pool. - * @param n - * The number of elements in the mbuf pool. The optimum size (in terms - * of memory usage) for a mempool is when n is a power of two minus one: - * n = (2^q - 1). - * @param cache_size - * Size of the per-core object cache. See rte_mempool_create() for - * details. - * @param priv_size - * Size of application private are between the rte_mbuf structure - * and the data buffer. This value must be aligned to RTE_MBUF_PRIV_ALIGN. - * @param data_room_size - * Size of data buffer in each mbuf, including RTE_PKTMBUF_HEADROOM. - * @param socket_id - * The socket identifier where the memory should be allocated. The - * value can be *SOCKET_ID_ANY* if there is no NUMA constraint for the - * reserved zone. - * @return - * The pointer to the new allocated mempool, on success. NULL on error - * with rte_errno set appropriately. Possible rte_errno values include: - * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure - * - E_RTE_SECONDARY - function was called from a secondary process instance - * - EINVAL - cache size provided is too large, or priv_size is not aligned. - * - ENOSPC - the maximum number of memzones has already been allocated - * - EEXIST - a memzone with the same name already exists - * - ENOMEM - no appropriate memory area found in which to create memzone - */ -struct rte_mempool * -rte_pktmbuf_pool_create(const char *name, unsigned n, - unsigned cache_size, uint16_t priv_size, uint16_t data_room_size, - int socket_id); - -/** - * Get the data room size of mbufs stored in a pktmbuf_pool - * - * The data room size is the amount of data that can be stored in a - * mbuf including the headroom (RTE_PKTMBUF_HEADROOM). - * - * @param mp - * The packet mbuf pool. - * @return - * The data room size of mbufs stored in this mempool. - */ -static inline uint16_t -rte_pktmbuf_data_room_size(struct rte_mempool *mp) -{ - struct rte_pktmbuf_pool_private *mbp_priv; - - mbp_priv = (struct rte_pktmbuf_pool_private *)rte_mempool_get_priv(mp); - return mbp_priv->mbuf_data_room_size; -} - -/** - * Get the application private size of mbufs stored in a pktmbuf_pool - * - * The private size of mbuf is a zone located between the rte_mbuf - * structure and the data buffer where an application can store data - * associated to a packet. - * - * @param mp - * The packet mbuf pool. - * @return - * The private size of mbufs stored in this mempool. - */ -static inline uint16_t -rte_pktmbuf_priv_size(struct rte_mempool *mp) -{ - struct rte_pktmbuf_pool_private *mbp_priv; - - mbp_priv = (struct rte_pktmbuf_pool_private *)rte_mempool_get_priv(mp); - return mbp_priv->mbuf_priv_size; -} - -/** - * 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->vlan_tci_outer = 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; -} - -/** - * 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 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 m - * The packet mbuf we're attaching to. - */ -static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *m) -{ - struct rte_mbuf *md; - - RTE_MBUF_ASSERT(RTE_MBUF_DIRECT(mi) && - rte_mbuf_refcnt_read(mi) == 1); - - /* if m is not direct, get the mbuf that embeds the data */ - if (RTE_MBUF_DIRECT(m)) - md = m; - else - md = rte_mbuf_from_indirect(m); - - rte_mbuf_refcnt_update(md, 1); - mi->priv_size = m->priv_size; - mi->buf_physaddr = m->buf_physaddr; - mi->buf_addr = m->buf_addr; - mi->buf_len = m->buf_len; - - mi->next = m->next; - mi->data_off = m->data_off; - mi->data_len = m->data_len; - mi->port = m->port; - mi->vlan_tci = m->vlan_tci; - mi->vlan_tci_outer = m->vlan_tci_outer; - mi->tx_offload = m->tx_offload; - mi->hash = m->hash; - - mi->next = NULL; - mi->pkt_len = mi->data_len; - mi->nb_segs = 1; - mi->ol_flags = m->ol_flags | IND_ATTACHED_MBUF; - mi->packet_type = m->packet_type; - - __rte_mbuf_sanity_check(mi, 1); - __rte_mbuf_sanity_check(m, 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) -{ - struct rte_mempool *mp = m->pool; - uint32_t mbuf_size, buf_len, priv_size; - - priv_size = rte_pktmbuf_priv_size(mp); - mbuf_size = sizeof(struct rte_mbuf) + priv_size; - buf_len = rte_pktmbuf_data_room_size(mp); - - m->priv_size = priv_size; - m->buf_addr = (char *)m + mbuf_size; - m->buf_physaddr = rte_mempool_virt2phy(mp, m) + mbuf_size; - m->buf_len = (uint16_t)buf_len; - m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM, (uint16_t)m->buf_len); - m->data_len = 0; - m->ol_flags = 0; -} - -static inline struct rte_mbuf* __attribute__((always_inline)) -__rte_pktmbuf_prefree_seg(struct rte_mbuf *m) -{ - __rte_mbuf_sanity_check(m, 0); - - if (likely(rte_mbuf_refcnt_update(m, -1) == 0)) { - - /* if this is an indirect mbuf, then - * - detach mbuf - * - free attached mbuf segment - */ - if (RTE_MBUF_INDIRECT(m)) { - struct rte_mbuf *md = rte_mbuf_from_indirect(m); - rte_pktmbuf_detach(m); - if (rte_mbuf_refcnt_update(md, -1) == 0) - __rte_mbuf_raw_free(md); - } - return m; - } - return NULL; -} - -/** - * 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; - } -} - -/** - * 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); -} - -/** - * 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 an offset into the data in the mbuf. - * - * The returned pointer is cast to type t. Before using this - * function, the user must ensure that the first segment is large - * enough to accommodate its data. - * - * @param m - * The packet mbuf. - * @param o - * The offset into the mbuf data. - * @param t - * The type to cast the result into. - */ -#define rte_pktmbuf_mtod_offset(m, t, o) \ - ((t)((char *)(m)->buf_addr + (m)->data_off + (o))) - -/** - * 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 the first segment is large - * enough to accommodate its data. - * - * @param m - * The packet mbuf. - * @param t - * The type to cast the result into. - */ -#define rte_pktmbuf_mtod(m, t) rte_pktmbuf_mtod_offset(m, t, 0) - -/** - * A macro that returns the physical address that points to an offset of the - * start of the data in the mbuf - * - * @param m - * The packet mbuf. - * @param o - * The offset into the data to calculate address from. - */ -#define rte_pktmbuf_mtophys_offset(m, o) \ - (phys_addr_t)((m)->buf_physaddr + (m)->data_off + (o)) - -/** - * A macro that returns the physical address that points to the start of the - * data in the mbuf - * - * @param m - * The packet mbuf. - */ -#define rte_pktmbuf_mtophys(m) rte_pktmbuf_mtophys_offset(m, 0) - -/** - * 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); -} - -/** - * Chain an mbuf to another, thereby creating a segmented packet. - * - * Note: The implementation will do a linear walk over the segments to find - * the tail entry. For cases when there are many segments, it's better to - * chain the entries manually. - * - * @param head - * The head of the mbuf chain (the first packet) - * @param tail - * The mbuf to put last in the chain - * - * @return - * - 0, on success. - * - -EOVERFLOW, if the chain is full (256 entries) - */ -static inline int rte_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *tail) -{ - struct rte_mbuf *cur_tail; - - /* Check for number-of-segments-overflow */ - if (head->nb_segs + tail->nb_segs >= 1 << (sizeof(head->nb_segs) * 8)) - return -EOVERFLOW; - - /* Chain 'tail' onto the old tail */ - cur_tail = rte_pktmbuf_lastseg(head); - cur_tail->next = tail; - - /* accumulate number of segments and total length. */ - head->nb_segs = (uint8_t)(head->nb_segs + tail->nb_segs); - head->pkt_len += tail->pkt_len; - - /* pkt_len is only set in the head */ - tail->pkt_len = tail->data_len; - - return 0; -} - -/** - * 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_ */ |