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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | AUTHOR | COLOPHON |
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ibv_imp...mport_mr(3) Libibverbs Programmer’s Manualibv_imp...mport_mr(3)
ibv_import_mr - import an MR from a given ibv_pd
ibv_unimport_mr - unimport an MR
#include <infiniband/verbs.h>
struct ibv_mr *ibv_import_mr(struct ibv_pd *pd, uint32_t mr_handle);
void ibv_unimport_mr(struct ibv_mr *mr)
ibv_import_mr() returns a Memory region (MR) that is associated
with the given mr_handle in the RDMA context that assosicated with
the given pd.
The input mr_handle value must be a valid kernel handle for an MR
object in the assosicated RDMA context. It can be achieved from
the original MR by getting its ibv_mr->handle member value.
ibv_unimport_mr() un import the MR. Once the MR usage has been
ended ibv_dereg_mr() or ibv_unimport_mr() 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 MR. 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_mr() returns a pointer to the allocated MR, or NULL if
the request fails.
The addr field in the imported MR is not applicable, NULL value is
expected.
ibv_reg_mr(3), ibv_reg_dm_mr(3), ibv_reg_mr_iova(3),
ibv_reg_mr_iova2(3), ibv_dereg_mr(3),
Yishai Hadas ⟨yishaih@mellanox.com⟩
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 2025-08-11. (At
that time, the date of the most recent commit that was found in
the repository was 2025-08-04.) 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
man-pages@man7.org
libibverbs 2020-5-3 ibv_imp...mport_mr(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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