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Document the rdma_cm configfs limitation: configfs is global, so same-named RDMA devices in different net namespaces cannot both be represented there. Signed-off-by: Jiri Pirko <jiri@nvidia.com> Link: https://patch.msgid.link/20260716132316.1495242-10-jiri@resnulli.us Signed-off-by: Leon Romanovsky <leon@kernel.org>
35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
What: /config/rdma_cm
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Date: November 29, 2015
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KernelVersion: 4.4.0
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Description: Interface is used to configure RDMA-cable HCAs in respect to
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RDMA-CM attributes.
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Attributes are visible only when configfs is mounted. To mount
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configfs in /config directory use:
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# mount -t configfs none /config/
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In order to set parameters related to a specific HCA, a directory
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for this HCA has to be created:
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mkdir -p /config/rdma_cm/<hca>
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Note: configfs has no network namespace support, so this
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interface cannot represent two devices that share a name in
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different network namespaces (possible in exclusive netns mode).
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What: /config/rdma_cm/<hca>/ports/<port-num>/default_roce_mode
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Date: November 29, 2015
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KernelVersion: 4.4.0
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Description: RDMA-CM based connections from HCA <hca> at port <port-num>
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will be initiated with this RoCE type as default.
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The possible RoCE types are either "IB/RoCE v1" or "RoCE v2".
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This parameter has RW access.
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What: /config/rdma_cm/<hca>/ports/<port-num>/default_roce_tos
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Date: February 7, 2017
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KernelVersion: 4.11.0
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Description: RDMA-CM QPs from HCA <hca> at port <port-num>
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will be created with this TOS as default.
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This can be overridden by using the rdma_set_option API.
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The possible RoCE TOS values are 0-255.
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