|IBV_OPEN_DEVICE(3)||Libibverbs Programmer's Manual||IBV_OPEN_DEVICE(3)|
ibv_open_device, ibv_close_device - open and close an RDMA device context
#include <infiniband/verbs.h> struct ibv_context *ibv_open_device(struct ibv_device *device); int ibv_close_device(struct ibv_context *context);
ibv_open_device() opens the device device and creates a context for further use.
ibv_close_device() closes the device context context.
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.
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.
ibv_get_device_list(3), ibv_query_device(3), ibv_query_port(3), ibv_query_gid(3), ibv_query_pkey(3)