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When sending a RDMA_CM_REQUEST, the NVMe RDMA Transport Specification allows you to populate the cntlid field in the RDMA_CM_REQUEST Private Data. The cntlid is returned by the target on completion of the first RDMA_CM_REQUEST command (which creates the admin queue). The cntlid field can then be populated by the host when the I/O queues are created (using additional RDMA_CM_REQUEST commands), such that the target can perform extra validation for additional RDMA_CM_REQUEST commands. This additional error code and error message is also added, such that nvme_rdma_cm_msg() will display the proper error message if the target fails the RDMA_CM_REQUEST command because of this extra validation. Signed-off-by: Niklas Cassel <cassel@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
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*/
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#ifndef _LINUX_NVME_RDMA_H
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#define _LINUX_NVME_RDMA_H
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#define NVME_RDMA_IP_PORT 4420
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#define NVME_RDMA_MAX_QUEUE_SIZE 256
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#define NVME_RDMA_MAX_METADATA_QUEUE_SIZE 128
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#define NVME_RDMA_DEFAULT_QUEUE_SIZE 128
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enum nvme_rdma_cm_fmt {
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NVME_RDMA_CM_FMT_1_0 = 0x0,
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};
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enum nvme_rdma_cm_status {
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NVME_RDMA_CM_INVALID_LEN = 0x01,
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NVME_RDMA_CM_INVALID_RECFMT = 0x02,
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NVME_RDMA_CM_INVALID_QID = 0x03,
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NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
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NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
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NVME_RDMA_CM_NO_RSC = 0x06,
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NVME_RDMA_CM_INVALID_IRD = 0x07,
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NVME_RDMA_CM_INVALID_ORD = 0x08,
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NVME_RDMA_CM_INVALID_CNTLID = 0x09,
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};
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static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
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{
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switch (status) {
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case NVME_RDMA_CM_INVALID_LEN:
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return "invalid length";
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case NVME_RDMA_CM_INVALID_RECFMT:
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return "invalid record format";
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case NVME_RDMA_CM_INVALID_QID:
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return "invalid queue ID";
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case NVME_RDMA_CM_INVALID_HSQSIZE:
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return "invalid host SQ size";
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case NVME_RDMA_CM_INVALID_HRQSIZE:
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return "invalid host RQ size";
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case NVME_RDMA_CM_NO_RSC:
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return "resource not found";
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case NVME_RDMA_CM_INVALID_IRD:
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return "invalid IRD";
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case NVME_RDMA_CM_INVALID_ORD:
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return "Invalid ORD";
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case NVME_RDMA_CM_INVALID_CNTLID:
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return "invalid controller ID";
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default:
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return "unrecognized reason";
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}
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}
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/**
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* struct nvme_rdma_cm_req - rdma connect request
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*
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* @recfmt: format of the RDMA Private Data
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* @qid: queue Identifier for the Admin or I/O Queue
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* @hrqsize: host receive queue size to be created
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* @hsqsize: host send queue size to be created
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*/
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struct nvme_rdma_cm_req {
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__le16 recfmt;
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__le16 qid;
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__le16 hrqsize;
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__le16 hsqsize;
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__le16 cntlid;
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u8 rsvd[22];
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};
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/**
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* struct nvme_rdma_cm_rep - rdma connect reply
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*
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* @recfmt: format of the RDMA Private Data
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* @crqsize: controller receive queue size
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*/
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struct nvme_rdma_cm_rep {
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__le16 recfmt;
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__le16 crqsize;
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u8 rsvd[28];
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};
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/**
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* struct nvme_rdma_cm_rej - rdma connect reject
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*
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* @recfmt: format of the RDMA Private Data
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* @sts: error status for the associated connect request
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*/
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struct nvme_rdma_cm_rej {
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__le16 recfmt;
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__le16 sts;
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};
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#endif /* _LINUX_NVME_RDMA_H */
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