ibv_import_pd - import a PD from a given ibv_context
ibv_unimport_pd - unimport a PD
#include <infiniband/verbs.h> struct ibv_pd *ibv_import_pd(struct ibv_context *context, uint32_t pd_handle); void ibv_unimport_pd(struct ibv_pd *pd)
ibv_import_pd() returns a protection domain (PD) that is associated with the given pd_handle in the given context.
The input pd_handle value must be a valid kernel handle for a PD object in the given context. It can be achieved from the original PD by getting its ibv_pd->handle member value.
The returned ibv_pd can be used in all verbs that get a protection domain.
ibv_unimport_pd() unimport the PD. Once the PD usage has been ended ibv_dealloc_pd() or ibv_unimport_pd() should be called. The first one will go to the kernel to destroy the object once the second one way cleanup what ever is needed/opposite of the import without calling the kernel.
This is the responsibility of the application to coordinate between all ibv_context(s) that use this PD. Once destroy is done no other process can touch the object except for unimport. All users of the context must collaborate to ensure this.
ibv_import_pd() returns a pointer to the allocated PD, or NULL if the request fails.
ibv_alloc_pd(3), ibv_dealloc_pd(3),
Yishai Hadas <yishaih@mellanox.com>