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307 lines
7.4 KiB
307 lines
7.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* NVMe Fabrics command implementation. |
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* Copyright (c) 2015-2016 HGST, a Western Digital Company. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/blkdev.h> |
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#include "nvmet.h" |
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static void nvmet_execute_prop_set(struct nvmet_req *req) |
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{ |
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u64 val = le64_to_cpu(req->cmd->prop_set.value); |
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u16 status = 0; |
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if (!nvmet_check_transfer_len(req, 0)) |
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return; |
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if (req->cmd->prop_set.attrib & 1) { |
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req->error_loc = |
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offsetof(struct nvmf_property_set_command, attrib); |
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status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
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goto out; |
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} |
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switch (le32_to_cpu(req->cmd->prop_set.offset)) { |
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case NVME_REG_CC: |
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nvmet_update_cc(req->sq->ctrl, val); |
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break; |
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default: |
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req->error_loc = |
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offsetof(struct nvmf_property_set_command, offset); |
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status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
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} |
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out: |
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nvmet_req_complete(req, status); |
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} |
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static void nvmet_execute_prop_get(struct nvmet_req *req) |
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{ |
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struct nvmet_ctrl *ctrl = req->sq->ctrl; |
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u16 status = 0; |
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u64 val = 0; |
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if (!nvmet_check_transfer_len(req, 0)) |
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return; |
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if (req->cmd->prop_get.attrib & 1) { |
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switch (le32_to_cpu(req->cmd->prop_get.offset)) { |
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case NVME_REG_CAP: |
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val = ctrl->cap; |
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break; |
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default: |
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status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
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break; |
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} |
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} else { |
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switch (le32_to_cpu(req->cmd->prop_get.offset)) { |
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case NVME_REG_VS: |
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val = ctrl->subsys->ver; |
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break; |
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case NVME_REG_CC: |
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val = ctrl->cc; |
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break; |
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case NVME_REG_CSTS: |
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val = ctrl->csts; |
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break; |
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default: |
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status = NVME_SC_INVALID_FIELD | NVME_SC_DNR; |
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break; |
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} |
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} |
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if (status && req->cmd->prop_get.attrib & 1) { |
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req->error_loc = |
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offsetof(struct nvmf_property_get_command, offset); |
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} else { |
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req->error_loc = |
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offsetof(struct nvmf_property_get_command, attrib); |
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} |
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req->cqe->result.u64 = cpu_to_le64(val); |
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nvmet_req_complete(req, status); |
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} |
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u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req) |
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{ |
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struct nvme_command *cmd = req->cmd; |
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switch (cmd->fabrics.fctype) { |
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case nvme_fabrics_type_property_set: |
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req->execute = nvmet_execute_prop_set; |
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break; |
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case nvme_fabrics_type_property_get: |
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req->execute = nvmet_execute_prop_get; |
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break; |
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default: |
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pr_err("received unknown capsule type 0x%x\n", |
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cmd->fabrics.fctype); |
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req->error_loc = offsetof(struct nvmf_common_command, fctype); |
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return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; |
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} |
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return 0; |
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} |
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static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req) |
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{ |
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struct nvmf_connect_command *c = &req->cmd->connect; |
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u16 qid = le16_to_cpu(c->qid); |
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u16 sqsize = le16_to_cpu(c->sqsize); |
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struct nvmet_ctrl *old; |
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u16 ret; |
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old = cmpxchg(&req->sq->ctrl, NULL, ctrl); |
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if (old) { |
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pr_warn("queue already connected!\n"); |
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req->error_loc = offsetof(struct nvmf_connect_command, opcode); |
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return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR; |
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} |
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if (!sqsize) { |
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pr_warn("queue size zero!\n"); |
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req->error_loc = offsetof(struct nvmf_connect_command, sqsize); |
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ret = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR; |
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goto err; |
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} |
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/* note: convert queue size from 0's-based value to 1's-based value */ |
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nvmet_cq_setup(ctrl, req->cq, qid, sqsize + 1); |
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nvmet_sq_setup(ctrl, req->sq, qid, sqsize + 1); |
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if (c->cattr & NVME_CONNECT_DISABLE_SQFLOW) { |
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req->sq->sqhd_disabled = true; |
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req->cqe->sq_head = cpu_to_le16(0xffff); |
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} |
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if (ctrl->ops->install_queue) { |
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ret = ctrl->ops->install_queue(req->sq); |
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if (ret) { |
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pr_err("failed to install queue %d cntlid %d ret %x\n", |
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qid, ctrl->cntlid, ret); |
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goto err; |
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} |
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} |
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return 0; |
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err: |
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req->sq->ctrl = NULL; |
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return ret; |
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} |
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static void nvmet_execute_admin_connect(struct nvmet_req *req) |
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{ |
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struct nvmf_connect_command *c = &req->cmd->connect; |
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struct nvmf_connect_data *d; |
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struct nvmet_ctrl *ctrl = NULL; |
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u16 status = 0; |
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if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data))) |
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return; |
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d = kmalloc(sizeof(*d), GFP_KERNEL); |
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if (!d) { |
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status = NVME_SC_INTERNAL; |
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goto complete; |
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} |
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status = nvmet_copy_from_sgl(req, 0, d, sizeof(*d)); |
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if (status) |
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goto out; |
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/* zero out initial completion result, assign values as needed */ |
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req->cqe->result.u32 = 0; |
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if (c->recfmt != 0) { |
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pr_warn("invalid connect version (%d).\n", |
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le16_to_cpu(c->recfmt)); |
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req->error_loc = offsetof(struct nvmf_connect_command, recfmt); |
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status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR; |
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goto out; |
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} |
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if (unlikely(d->cntlid != cpu_to_le16(0xffff))) { |
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pr_warn("connect attempt for invalid controller ID %#x\n", |
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d->cntlid); |
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status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR; |
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req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(cntlid); |
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goto out; |
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} |
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status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req, |
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le32_to_cpu(c->kato), &ctrl); |
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if (status) { |
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if (status == (NVME_SC_INVALID_FIELD | NVME_SC_DNR)) |
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req->error_loc = |
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offsetof(struct nvme_common_command, opcode); |
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goto out; |
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} |
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ctrl->pi_support = ctrl->port->pi_enable && ctrl->subsys->pi_support; |
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uuid_copy(&ctrl->hostid, &d->hostid); |
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status = nvmet_install_queue(ctrl, req); |
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if (status) { |
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nvmet_ctrl_put(ctrl); |
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goto out; |
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} |
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pr_info("creating controller %d for subsystem %s for NQN %s%s.\n", |
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ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn, |
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ctrl->pi_support ? " T10-PI is enabled" : ""); |
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req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid); |
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out: |
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kfree(d); |
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complete: |
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nvmet_req_complete(req, status); |
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} |
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static void nvmet_execute_io_connect(struct nvmet_req *req) |
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{ |
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struct nvmf_connect_command *c = &req->cmd->connect; |
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struct nvmf_connect_data *d; |
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struct nvmet_ctrl *ctrl = NULL; |
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u16 qid = le16_to_cpu(c->qid); |
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u16 status = 0; |
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if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data))) |
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return; |
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d = kmalloc(sizeof(*d), GFP_KERNEL); |
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if (!d) { |
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status = NVME_SC_INTERNAL; |
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goto complete; |
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} |
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status = nvmet_copy_from_sgl(req, 0, d, sizeof(*d)); |
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if (status) |
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goto out; |
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/* zero out initial completion result, assign values as needed */ |
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req->cqe->result.u32 = 0; |
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if (c->recfmt != 0) { |
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pr_warn("invalid connect version (%d).\n", |
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le16_to_cpu(c->recfmt)); |
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status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR; |
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goto out; |
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} |
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status = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn, |
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le16_to_cpu(d->cntlid), |
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req, &ctrl); |
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if (status) |
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goto out; |
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if (unlikely(qid > ctrl->subsys->max_qid)) { |
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pr_warn("invalid queue id (%d)\n", qid); |
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status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR; |
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req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(qid); |
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goto out_ctrl_put; |
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} |
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status = nvmet_install_queue(ctrl, req); |
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if (status) { |
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/* pass back cntlid that had the issue of installing queue */ |
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req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid); |
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goto out_ctrl_put; |
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} |
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pr_debug("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid); |
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out: |
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kfree(d); |
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complete: |
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nvmet_req_complete(req, status); |
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return; |
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out_ctrl_put: |
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nvmet_ctrl_put(ctrl); |
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goto out; |
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} |
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u16 nvmet_parse_connect_cmd(struct nvmet_req *req) |
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{ |
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struct nvme_command *cmd = req->cmd; |
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if (!nvme_is_fabrics(cmd)) { |
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pr_err("invalid command 0x%x on unconnected queue.\n", |
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cmd->fabrics.opcode); |
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req->error_loc = offsetof(struct nvme_common_command, opcode); |
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return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; |
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} |
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if (cmd->fabrics.fctype != nvme_fabrics_type_connect) { |
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pr_err("invalid capsule type 0x%x on unconnected queue.\n", |
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cmd->fabrics.fctype); |
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req->error_loc = offsetof(struct nvmf_common_command, fctype); |
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return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; |
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} |
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if (cmd->connect.qid == 0) |
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req->execute = nvmet_execute_admin_connect; |
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else |
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req->execute = nvmet_execute_io_connect; |
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return 0; |
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}
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