2 * NVMe Fabrics command implementation.
3 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #include <linux/blkdev.h>
18 static void nvmet_execute_prop_set(struct nvmet_req *req)
22 if (!(req->cmd->prop_set.attrib & 1)) {
23 u64 val = le64_to_cpu(req->cmd->prop_set.value);
25 switch (le32_to_cpu(req->cmd->prop_set.offset)) {
27 nvmet_update_cc(req->sq->ctrl, val);
30 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
34 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
37 nvmet_req_complete(req, status);
40 static void nvmet_execute_prop_get(struct nvmet_req *req)
42 struct nvmet_ctrl *ctrl = req->sq->ctrl;
46 if (req->cmd->prop_get.attrib & 1) {
47 switch (le32_to_cpu(req->cmd->prop_get.offset)) {
52 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
56 switch (le32_to_cpu(req->cmd->prop_get.offset)) {
58 val = ctrl->subsys->ver;
67 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
72 req->rsp->result64 = cpu_to_le64(val);
73 nvmet_req_complete(req, status);
76 int nvmet_parse_fabrics_cmd(struct nvmet_req *req)
78 struct nvme_command *cmd = req->cmd;
82 switch (cmd->fabrics.fctype) {
83 case nvme_fabrics_type_property_set:
85 req->execute = nvmet_execute_prop_set;
87 case nvme_fabrics_type_property_get:
89 req->execute = nvmet_execute_prop_get;
92 pr_err("received unknown capsule type 0x%x\n",
94 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
100 static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
102 struct nvmf_connect_command *c = &req->cmd->connect;
103 u16 qid = le16_to_cpu(c->qid);
104 u16 sqsize = le16_to_cpu(c->sqsize);
105 struct nvmet_ctrl *old;
107 old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
109 pr_warn("queue already connected!\n");
110 return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
113 nvmet_cq_setup(ctrl, req->cq, qid, sqsize);
114 nvmet_sq_setup(ctrl, req->sq, qid, sqsize);
118 static void nvmet_execute_admin_connect(struct nvmet_req *req)
120 struct nvmf_connect_command *c = &req->cmd->connect;
121 struct nvmf_connect_data *d;
122 struct nvmet_ctrl *ctrl = NULL;
125 d = kmap(sg_page(req->sg)) + req->sg->offset;
127 /* zero out initial completion result, assign values as needed */
128 req->rsp->result = 0;
130 if (c->recfmt != 0) {
131 pr_warn("invalid connect version (%d).\n",
132 le16_to_cpu(c->recfmt));
133 status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
137 if (unlikely(d->cntlid != cpu_to_le16(0xffff))) {
138 pr_warn("connect attempt for invalid controller ID %#x\n",
140 status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
141 req->rsp->result = IPO_IATTR_CONNECT_DATA(cntlid);
145 status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req,
146 le32_to_cpu(c->kato), &ctrl);
150 status = nvmet_install_queue(ctrl, req);
152 nvmet_ctrl_put(ctrl);
156 pr_info("creating controller %d for NQN %s.\n",
157 ctrl->cntlid, ctrl->hostnqn);
158 req->rsp->result16 = cpu_to_le16(ctrl->cntlid);
161 kunmap(sg_page(req->sg));
162 nvmet_req_complete(req, status);
165 static void nvmet_execute_io_connect(struct nvmet_req *req)
167 struct nvmf_connect_command *c = &req->cmd->connect;
168 struct nvmf_connect_data *d;
169 struct nvmet_ctrl *ctrl = NULL;
170 u16 qid = le16_to_cpu(c->qid);
173 d = kmap(sg_page(req->sg)) + req->sg->offset;
175 /* zero out initial completion result, assign values as needed */
176 req->rsp->result = 0;
178 if (c->recfmt != 0) {
179 pr_warn("invalid connect version (%d).\n",
180 le16_to_cpu(c->recfmt));
181 status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
185 status = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn,
186 le16_to_cpu(d->cntlid),
191 if (unlikely(qid > ctrl->subsys->max_qid)) {
192 pr_warn("invalid queue id (%d)\n", qid);
193 status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
194 req->rsp->result = IPO_IATTR_CONNECT_SQE(qid);
198 status = nvmet_install_queue(ctrl, req);
200 /* pass back cntlid that had the issue of installing queue */
201 req->rsp->result16 = cpu_to_le16(ctrl->cntlid);
205 pr_info("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid);
208 kunmap(sg_page(req->sg));
209 nvmet_req_complete(req, status);
213 nvmet_ctrl_put(ctrl);
217 int nvmet_parse_connect_cmd(struct nvmet_req *req)
219 struct nvme_command *cmd = req->cmd;
223 if (req->cmd->common.opcode != nvme_fabrics_command) {
224 pr_err("invalid command 0x%x on unconnected queue.\n",
225 cmd->fabrics.opcode);
226 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
228 if (cmd->fabrics.fctype != nvme_fabrics_type_connect) {
229 pr_err("invalid capsule type 0x%x on unconnected queue.\n",
230 cmd->fabrics.fctype);
231 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
234 req->data_len = sizeof(struct nvmf_connect_data);
235 if (cmd->connect.qid == 0)
236 req->execute = nvmet_execute_admin_connect;
238 req->execute = nvmet_execute_io_connect;