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rdma_create_event_channel(3) — Linux manual page

RDMA_CR..._CHANNEL(3) Librdmacm Programmer's ManualRDMA_CR..._CHANNEL(3)

NAME        top

       rdma_create_event_channel - Open a channel used to report       communication events.

SYNOPSIS        top

#include <rdma/rdma_cma.h>struct rdma_event_channel * rdma_create_event_channel (void);

ARGUMENTS        top

       void        no arguments

DESCRIPTION        top

       Asynchronous events are reported to users through event channels.

RETURN VALUE        top

       Returns a pointer to the created event channel, or NULL if the       request fails.  On failure, errno will be set to indicate the       failure reason.

NOTES        top

       Event channels are used to direct all events on an rdma_cm_id.       For many clients, a single event channel may be sufficient,       however, when managing a large number of connections or cm_id's,       users may find it useful to direct events for different cm_id's to       different channels for processing.       All created event channels must be destroyed by calling       rdma_destroy_event_channel.  Users should call rdma_get_cm_event       to retrieve events on an event channel.       Each event channel is mapped to a file descriptor.  The associated       file descriptor can be used and manipulated like any other fd to       change its behavior.  Users may make the fd non-blocking, poll or       select the fd, etc.

SEE ALSO        top

rdma_cm(7),rdma_get_cm_event(3),rdma_destroy_event_channel(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_CR..._CHANNEL(3)

Pages that refer to this page:rdma_create_ep(3), rdma_create_id(3), rdma_destroy_event_channel(3), rdma_get_cm_event(3), rdma_migrate_id(3), rdma_cm(7)

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