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   ibv_close_device    ( 3 )

открывать и закрывать контекст устройства RDMA (open and close an RDMA device context)

Имя (Name)

ibv_open_device, ibv_close_device - open and close an RDMA device context


Синопсис (Synopsis)

#include <infiniband/verbs.h>

struct ibv_context *ibv_open_device(struct ibv_device *device);

int ibv_close_device(struct ibv_context *context);


Описание (Description)

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

ibv_close_device() closes the device context context.


Возвращаемое значение (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.


Примечание (Note)

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.


Смотри также (See also)

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