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rdma_get_devices(3) — Linux manual page

RDMA_GET_DEVICES(3)   Librdmacm Programmer's ManualRDMA_GET_DEVICES(3)

NAME        top

       rdma_get_devices - Get a list of RDMA devices currently available.

SYNOPSIS        top

#include <rdma/rdma_cma.h>struct ibv_context ** rdma_get_devices (int *num_devices);

ARGUMENTS        top

       num_devices If non-NULL, set to the number of devices returned.

DESCRIPTION        top

       Return a NULL-terminated array of opened RDMA devices.  Callers       can use this routine to allocate resources on specific RDMA       devices that will be shared across multiple rdma_cm_id's.

RETURN VALUE        top

       Returns an array of available RDMA devices, or NULL if the request       fails.  On failure, errno will be set to indicate the failure       reason.

NOTES        top

       The returned array must be released by calling rdma_free_devices.       Devices remain opened while the librdmacm is loaded.

SEE ALSO        top

rdma_free_devices(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_GET_DEVICES(3)

Pages that refer to this page:rdma_create_id(3), rdma_free_devices(3), rdma_cm(7)

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