nvmet: Add get_mdts op for controllers

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Some transports, such as RDMA, would like to set the Maximum Data
Transfer Size (MDTS) according to device/port/ctrl characteristics.
This will enable the transport to set the optimal MDTS according to
controller needs and device capabilities. Add a new nvmet transport
op that is called during ctrl identification. This will not effect
transports that don't implement this option. The return value of the new
op is according to the NVMe spec definition for MDTS.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>

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Max Gurtovoy 2020-03-08 12:55:03 +02:00 • committed by Keith Busch

parent 2db24e4a22

commit 02cb00e233

2 changed files with 7 additions and 2 deletions

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8

drivers/nvme/target/admin-cmd.c

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1

drivers/nvme/target/nvmet.h

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