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rte_mbuf(3) DPDK rte_mbuf(3) NAME rte_mbuf SYNOPSIS #include <rte_mbuf_core.h> Data Fields void * buf_addr struct rte_mbuf * next uint64_t ol_flags struct rte_mempool * pool uint64_t dynfield2 struct rte_mbuf_ext_shared_info * shinfo uint16_t priv_size uint16_t timesync uint32_t dynfield1 [9] uint16_t refcnt uint16_t nb_segs uint16_t port uint32_t packet_type uint8_t l2_type:4 uint8_t l3_type:4 uint8_t l4_type:4 uint8_t tun_type:4 uint8_t inner_esp_next_proto uint8_t inner_l2_type:4 uint8_t inner_l3_type:4 uint8_t inner_l4_type:4 uint32_t pkt_len uint16_t data_len uint16_t vlan_tci uint32_t rss uint32_t lo uint32_t hi struct { uint32_t hi } fdir struct rte_mbuf_sched sched uint16_t txq struct { uint16_t txq } txadapter uint32_t usr union { uint32_t rss struct { uint32_t hi } fdir struct rte_mbuf_sched sched struct { uint16_t txq } txadapter uint32_t usr } hash uint16_t vlan_tci_outer uint16_t buf_len uint64_t tx_offload uint64_t l2_len:RTE_MBUF_L2_LEN_BITS uint64_t l3_len:RTE_MBUF_L3_LEN_BITS uint64_t l4_len:RTE_MBUF_L4_LEN_BITS uint64_t tso_segsz:RTE_MBUF_TSO_SEGSZ_BITS uint64_t outer_l3_len:RTE_MBUF_OUTL3_LEN_BITS uint64_t outer_l2_len:RTE_MBUF_OUTL2_LEN_BITS Detailed Description The generic rte_mbuf, containing a packet mbuf. Definition at line 475 of file rte_mbuf_core.h. Field Documentation void* buf_addr Virtual address of segment buffer. Definition at line 476 of file rte_mbuf_core.h. struct rte_mbuf* next Next segment of scattered packet. This field is valid when physical address field is undefined. Otherwise next pointer in the second cache line will be used. Definition at line 493 of file rte_mbuf_core.h. uint16_t refcnt Reference counter. Its size should at least equal to the size of port field (16 bits), to support zero-copy broadcast. 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 RTE_MBUF_REFCNT_ATOMIC flag. Definition at line 514 of file rte_mbuf_core.h. uint16_t nb_segs Number of segments. Only valid for the first segment of an mbuf chain. Definition at line 520 of file rte_mbuf_core.h. uint16_t port Input port (16 bits to support more than 256 virtual ports). The event eth Tx adapter uses this field to specify the output port. Definition at line 525 of file rte_mbuf_core.h. uint64_t ol_flags Offload features. Definition at line 529 of file rte_mbuf_core.h. uint32_t packet_type L2/L3/L4 and tunnel information. Definition at line 545 of file rte_mbuf_core.h. uint8_t l2_type (Outer) L2 type. Definition at line 548 of file rte_mbuf_core.h. uint8_t l3_type (Outer) L3 type. Definition at line 549 of file rte_mbuf_core.h. uint8_t l4_type (Outer) L4 type. Definition at line 550 of file rte_mbuf_core.h. uint8_t tun_type Tunnel type. Definition at line 551 of file rte_mbuf_core.h. uint8_t inner_esp_next_proto ESP next protocol type, valid if RTE_PTYPE_TUNNEL_ESP tunnel type is set on both Tx and Rx. Definition at line 553 of file rte_mbuf_core.h. uint8_t inner_l2_type Inner L2 type. Definition at line 560 of file rte_mbuf_core.h. uint8_t inner_l3_type Inner L3 type. Definition at line 562 of file rte_mbuf_core.h. uint8_t inner_l4_type Inner L4 type. Definition at line 566 of file rte_mbuf_core.h. uint32_t pkt_len Total pkt len: sum of all segments. Definition at line 570 of file rte_mbuf_core.h. uint16_t data_len Amount of data in segment buffer. Definition at line 571 of file rte_mbuf_core.h. uint16_t vlan_tci VLAN TCI (CPU order), valid if RTE_MBUF_F_RX_VLAN is set. Definition at line 573 of file rte_mbuf_core.h. uint32_t rss RSS hash result if RSS enabled Definition at line 577 of file rte_mbuf_core.h. uint32_t lo Second 4 flexible bytes Definition at line 584 of file rte_mbuf_core.h. uint32_t hi First 4 flexible bytes or FD ID, dependent on RTE_MBUF_F_RX_FDIR_* flag in ol_flags. Definition at line 587 of file rte_mbuf_core.h. struct { ... } fdir Filter identifier if FDIR enabled struct rte_mbuf_sched sched Hierarchical scheduler : 8 bytes Definition at line 592 of file rte_mbuf_core.h. uint16_t txq The event eth Tx adapter uses this field to store Tx queue id. See also rte_event_eth_tx_adapter_txq_set() Definition at line 597 of file rte_mbuf_core.h. struct { ... } txadapter Eventdev ethdev Tx adapter uint32_t usr User defined tags. See rte_distributor_process() Definition at line 603 of file rte_mbuf_core.h. union { ... } hash hash information uint16_t vlan_tci_outer Outer VLAN TCI (CPU order), valid if RTE_MBUF_F_RX_QINQ is set. Definition at line 609 of file rte_mbuf_core.h. uint16_t buf_len Length of segment buffer. Definition at line 611 of file rte_mbuf_core.h. struct rte_mempool* pool Pool from which mbuf was allocated. Definition at line 615 of file rte_mbuf_core.h. uint64_t dynfield2 Reserved for dynamic fields when the next pointer is in first cache line (i.e. RTE_IOVA_IN_MBUF is 0). Definition at line 635 of file rte_mbuf_core.h. uint64_t tx_offload combined for easy fetch Definition at line 640 of file rte_mbuf_core.h. uint64_t l2_len L2 (MAC) Header Length for non-tunneling pkt. Outer_L4_len + ... + Inner_L2_len for tunneling pkt. Definition at line 643 of file rte_mbuf_core.h. uint64_t l3_len L3 (IP) Header Length. Definition at line 647 of file rte_mbuf_core.h. uint64_t l4_len L4 (TCP/UDP) Header Length. Definition at line 649 of file rte_mbuf_core.h. uint64_t tso_segsz TCP TSO segment size Definition at line 651 of file rte_mbuf_core.h. uint64_t outer_l3_len Outer L3 (IP) Hdr Length. Definition at line 666 of file rte_mbuf_core.h. uint64_t outer_l2_len Outer L2 (MAC) Hdr Length. Definition at line 668 of file rte_mbuf_core.h. struct rte_mbuf_ext_shared_info* shinfo Shared data for external buffer attached to mbuf. See rte_pktmbuf_attach_extbuf(). Definition at line 678 of file rte_mbuf_core.h. uint16_t priv_size Size of the application private data. In case of an indirect mbuf, it stores the direct mbuf private data size. Definition at line 683 of file rte_mbuf_core.h. uint16_t timesync Timesync flags for use with IEEE1588. Definition at line 686 of file rte_mbuf_core.h. uint32_t dynfield1[9] Reserved for dynamic fields. Definition at line 688 of file rte_mbuf_core.h. Author Generated automatically by Doxygen for DPDK from the source code. Version 25.11.0 Thu Jun 11 2026 rte_mbuf(3)
NAME | SYNOPSIS | Detailed Description | Field Documentation | Author
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