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

NAME
       ibv_open_device, ibv_close_device - open and close an RDMA device
       context

SYNOPSIS
       #include <infiniband/verbs.h>

       struct ibv_context *ibv_open_device(struct ibv_device *device);

       int ibv_close_device(struct ibv_context *context);

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

       ibv_close_device() closes the device context context.

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

AUTHORS
       Dotan Barak <dotanba@gmail.com>

libibverbs                        2006-10-31                IBV_OPEN_DEVICE(3)