Honggang Li 547ed331bb RDMA/srp: Add parse function for maximum initiator to target IU size ... According to SRP specifications 'srp-r16a' and 'srp2r06', IOControllerProfile attributes for SRP target port include the maximum initiator to target IU size. SRP connection daemons, such as srp_daemon, can get the value from the subnet manager. The SRP connection daemon can pass this value to kernel. This patch adds a parse function for it. Upstream commit [1] enables the kernel parameter, 'use_imm_data', by default. [1] also use (8 * 1024) as the default value for kernel parameter 'max_imm_data'. With those default values, the maximum initiator to target IU size will be 8260. In case the SRPT modules, which include the in-tree 'ib_srpt.ko' module, do not support SRP-2 'immediate data' feature, the default maximum initiator to target IU size is significantly smaller than 8260. For 'ib_srpt.ko' module, which built from source before [2], the default maximum initiator to target IU is 2116. [1] introduces a regression issue for old srp targets with default kernel parameters, as the connection will be rejected because of a too large maximum initiator to target IU size. [1] commit 882981f4a4 ("RDMA/srp: Add support for immediate data") [2] commit 5dabcd0456 ("RDMA/srpt: Add support for immediate data") Link: https://lore.kernel.org/r/20190927174352.7800-1-honli@redhat.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Honggang Li <honli@redhat.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>		2019-10-08 15:17:32 -03:00
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ib_srp.c	RDMA/srp: Add parse function for maximum initiator to target IU size	2019-10-08 15:17:32 -03:00
ib_srp.h	RDMA/srp: Add parse function for maximum initiator to target IU size	2019-10-08 15:17:32 -03:00
Kbuild	treewide: Add SPDX license identifier - Kbuild	2019-05-30 11:32:33 -07:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00