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rdma_notify(3) — Linux manual page

RDMA_NOTIFY(3)        Librdmacm Programmer's ManualRDMA_NOTIFY(3)

NAME        top

       rdma_notify - Notifies the librdmacm of an asynchronous event.

SYNOPSIS        top

#include <rdma/rdma_cma.h>int rdma_notify (struct rdma_cm_id *id, enum ibv_event_typeevent);

ARGUMENTS        top

       id          RDMA identifier.       event       Asynchronous event.

DESCRIPTION        top

       Used to notify the librdmacm of asynchronous events that have       occurred on a QP associated with the rdma_cm_id.

RETURN VALUE        top

       Returns 0 on success, or -1 on error.  If an error occurs, errno       will be set to indicate the failure reason.  If errno is set to       EISCONN (transport endpoint is already connected), this indicates       that the the underlying communication manager established the       connection before the call to rdma_notify could be processed.  In       this case, the error may safely be ignored.

NOTES        top

       Asynchronous events that occur on a QP are reported through the       user's device event handler.  This routine is used to notify the       librdmacm of communication events.  In most cases, use of this       routine is not necessary, however if connection establishment is       done out of band (such as done through Infiniband), it's possible       to receive data on a QP that is not yet considered connected.       This routine forces the connection into an established state in       this case in order to handle the rare situation where the       connection never forms on its own.  Calling this routine ensures       the delivery of the RDMA_CM_EVENT_ESTABLISHED event to the       application.  Events that should be reported to the CM are:       IB_EVENT_COMM_EST.

SEE ALSO        top

rdma_connect(3),rdma_accept(3),rdma_listen(3)

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                       2007-05-15RDMA_NOTIFY(3)

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