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NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHOR | COLOPHON |
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RDMA-SYSTEM(8) Linux RDMA-SYSTEM(8)
rdma-system - RDMA subsystem configuration
rdma [ OPTIONS ] sys { COMMAND | help }
OPTIONS := { -V[ersion] | -d[etails] }
rdma system show
rdma system set netns NEWMODE
rdma system set privileged-qkey NEWSTATE
rdma system help
rdma system set - set RDMA subsystem network namespace mode or
privileged qkey mode
rdma system show - display RDMA subsystem network namespace mode,
privileged qkey state and whether RDMA monitoring is supported.
NEWMODE - specifies the RDMA subsystem mode. Either exclusive or
shared. When user wants to assign dedicated RDMA device to a
particular network namespace, exclusive mode should be set before
creating any network namespace. If there are active network
namespaces and if one or more RDMA devices exist, changing mode
from shared to exclusive returns error code EBUSY.
When RDMA subsystem is in shared mode, RDMA device is accessible
in all network namespace. When RDMA device isolation among
multiple network namespaces is not needed, shared mode can be
used.
It is preferred to not change the subsystem mode when there is
active RDMA traffic running, even though it is supported.
NEWSTATE - Specifies the new state of the privileged-qkey
parameter, either on or off. This parameter determines whether a
non-privileged user is allowed to specify a controlled QKEY or
not.
rdma system show
Shows the state of RDMA subsystem network namespace mode on
the system, the state of privileged qkey parameter and whether
RDMA monitor is supported.
rdma system set netns exclusive
Sets the RDMA subsystem in network namespace exclusive mode.
In this mode RDMA devices are visible only in single network
namespace.
rdma system set netns shared
Sets the RDMA subsystem in network namespace shared mode. In
this mode RDMA devices are shared among network namespaces.
rdma system set privileged-qkey on
Sets the privileged-qkey parameter to on. In this state non-
privileged user is allowed to specify a controlled QKEY.
rdma system set privileged-qkey off
Sets the privileged-qkey parameter to off. In this state non-
privileged user is *not* allowed to specify a controlled QKEY.
rdma(8), rdma-link(8), rdma-resource(8), rdma-monitor(8),
network_namespaces(7), namespaces(7),
Parav Pandit <[email protected]>
This page is part of the iproute2 (utilities for controlling
TCP/IP networking and traffic) project. Information about the
project can be found at
⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
If you have a bug report for this manual page, send it to
[email protected], [email protected]. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/network/iproute2/iproute2.git⟩ on
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-08-08.) 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 [email protected]
iproute2 06 Jul 2017 RDMA-SYSTEM(8)
Pages that refer to this page: rdma(8), rdma-dev(8), rdma-monitor(8)
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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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