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rdma_set_local_ece(3) — Linux manual page

RDMA_SET_LOCAL_ECE(3) Librdmacm Programmer’s ManualRDMA_SET_LOCAL_ECE(3)

NAME        top

       rdma_set_local_ece - Set local ECE paraemters to be used for       REQ/REP communication.

SYNOPSIS        top

              #include <rdma/rdma_cma.h>              int rdma_set_local_ece(struct rdma_cm_id *id, struct ibv_ece *ece);

DESCRIPTION        top

rdma_set_local_ece()set local ECE parameters.       This function is suppose to be used by the users of external QPs.       The call needs to be performed before replying to the peer and       needed to configure RDMA_CM with desired ECE options.       Being used by external QP and RDMA_CM doesn’t manage that QP, the       peer needs to call to libibverbs API by itself.       Usual flow for the passive side will be:       • ibv_create_qp() <- create data QP.       • ece = ibv_query_ece() <- get ECE from libibvers provider.       • rdma_set_local_ece(ece) <- set desired ECE options.       • rdma_connect() <- send connection request       • ece = rdma_get_remote_ece() <- get ECE options from remote peer       • ibv_set_ece(ece) <- set local ECE options with data received         from the peer.       • ibv_modify_qp() <- enable data QP.       • rdma_accept()/rdma_establish()/rdma_reject_ece()

ARGUMENTS        top

id     RDMA communication identifier.       *ece   ECE parameters.

RETURN VALUE        top

rdma_set_local_ece()returns 0 on success, or -1 on error.  If an       error occurs, errno will be set to indicate the failure reason.

SEE ALSO        top

rdma_cm(7), rdma_get_remote_ece(3)

AUTHOR        top

       Leon Romanovsky ⟨leonro@mellanox.com⟩

COLOPHON        top

       This page is part of therdma-core (RDMA Core Userspace Libraries       and Daemons) project.  Information about the project can be found       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug       report for this manual page, send it to       linux-rdma@vger.kernel.org.  This page was obtained from the       project's upstream Git repository       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2025-08-11.  (At       that time, the date of the most recent commit that was found in       the repository was 2025-08-04.)  If you discover any rendering       problems in this HTML version of the page, or you believe there is       a better or more up-to-date source for the page, or you have       corrections or improvements to the information in this COLOPHON       (which isnot part of the original manual page), send a mail to       man-pages@man7.orglibrdmacm                       2020-02-02RDMA_SET_LOCAL_ECE(3)

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