ibv_open_device(3) — Linux manual page


IBV_OPEN_DEVICE(3)   Libibverbs Programmer's Manual   IBV_OPEN_DEVICE(3)

NAME         top

       ibv_open_device, ibv_close_device - open and close an RDMA device

SYNOPSIS         top

       #include <infiniband/verbs.h>

       struct ibv_context *ibv_open_device(struct ibv_device *device);

       int ibv_close_device(struct ibv_context *context);

DESCRIPTION         top

       ibv_open_device() opens the device device and creates a context
       for further use.

       ibv_close_device() closes the device context context.

RETURN VALUE         top

       ibv_open_device() returns a pointer to the allocated device
       context, or NULL if the request fails.

       ibv_close_device() returns 0 on success, -1 on failure.

NOTES         top

       ibv_close_device() does not release all the resources allocated
       using context context.  To avoid resource leaks, the user should
       release all associated resources before closing a context.

       Setting the environment variable **RDMAV_ALLOW_DISASSOC_DESTROY**
       tells the library to relate an EIO from destroy commands as a
       success as the kernel resources were already released. This comes
       to prevent memory leakage in the user space area upon device
       disassociation. Applications using this flag cannot call
       ibv_get_cq_event or ibv_get_async_event concurrently with any
       call to an object destruction function.

SEE ALSO         top

       ibv_get_device_list(3), ibv_query_device(3), ibv_query_port(3),
       ibv_query_gid(3), ibv_query_pkey(3)

AUTHORS         top

       Dotan Barak <dotanba@gmail.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 2023-06-23.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2023-06-14.)  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

libibverbs                     2006-10-31             IBV_OPEN_DEVICE(3)

Pages that refer to this page: ibv_create_ah_from_wc(3)ibv_create_comp_channel(3)ibv_get_async_event(3)ibv_query_device(3)ibv_query_device_ex(3)ibv_query_rt_values_ex(3)