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ibv_query_ece(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | AUTHOR | COLOPHON 

IBV_QUERY_ECE(3)      Libibverbs Programmer’s Manual     IBV_QUERY_ECE(3)

NAME         top

       ibv_query_ece - query ECE options.

SYNOPSIS         top

              #include <infiniband/verbs.h>

              int ibv_query_ece(struct ibv_qp *qp, struct ibv_ece *ece);

DESCRIPTION         top

       ibv_query_ece() query ECE options.

       Return to the user current ECE state for the QP.

ARGUMENTS         top

       qp     The queue pair (QP) associated with the ECE options.

       ## ece Argument
              The ECE values.

              struct ibv_ece {
                  uint32_t vendor_id;
                  uint32_t options;
                  uint32_t comp_mask;
              };

       vendor_id
              Unique identifier of the provider vendor on the network.
              The providers will set IEEE OUI here to distinguish itself
              in non-homogenius network.

       options
              Provider specific attributes which are supported.

       comp_mask
              Bitmask specifying what fields in the structure are valid.

RETURN VALUE         top

       ibv_query_ece() returns 0 when the call was successful, or the
       errno value which indicates the failure reason.

       EOPNOTSUPP
              libibverbs or provider driver doesn’t support the
              ibv_set_ece() verb.

       EINVAL In one of the following: o The QP is invalid.  o The ECE
              options are invalid.

SEE ALSO         top

       ibv_set_ece(3),

AUTHOR         top

       Leon Romanovsky ⟨leonro@mellanox.com⟩

COLOPHON         top

       This page is part of the rdma-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 is not part of the original manual page), send a mail to
       man-pages@man7.org

libibverbs                      2020-01-22               IBV_QUERY_ECE(3)

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