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5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7#include <linux/blkdev.h>
8#include "nvmet.h"
9
10static void nvmet_execute_prop_set(struct nvmet_req *req)
11{
12 u64 val = le64_to_cpu(req->cmd->prop_set.value);
13 u16 status = 0;
14
15 if (!nvmet_check_transfer_len(req, 0))
16 return;
17
18 if (req->cmd->prop_set.attrib & 1) {
19 req->error_loc =
20 offsetof(struct nvmf_property_set_command, attrib);
21 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
22 goto out;
23 }
24
25 switch (le32_to_cpu(req->cmd->prop_set.offset)) {
26 case NVME_REG_CC:
27 nvmet_update_cc(req->sq->ctrl, val);
28 break;
29 default:
30 req->error_loc =
31 offsetof(struct nvmf_property_set_command, offset);
32 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
33 }
34out:
35 nvmet_req_complete(req, status);
36}
37
38static void nvmet_execute_prop_get(struct nvmet_req *req)
39{
40 struct nvmet_ctrl *ctrl = req->sq->ctrl;
41 u16 status = 0;
42 u64 val = 0;
43
44 if (!nvmet_check_transfer_len(req, 0))
45 return;
46
47 if (req->cmd->prop_get.attrib & 1) {
48 switch (le32_to_cpu(req->cmd->prop_get.offset)) {
49 case NVME_REG_CAP:
50 val = ctrl->cap;
51 break;
52 default:
53 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
54 break;
55 }
56 } else {
57 switch (le32_to_cpu(req->cmd->prop_get.offset)) {
58 case NVME_REG_VS:
59 val = ctrl->subsys->ver;
60 break;
61 case NVME_REG_CC:
62 val = ctrl->cc;
63 break;
64 case NVME_REG_CSTS:
65 val = ctrl->csts;
66 break;
67 default:
68 status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
69 break;
70 }
71 }
72
73 if (status && req->cmd->prop_get.attrib & 1) {
74 req->error_loc =
75 offsetof(struct nvmf_property_get_command, offset);
76 } else {
77 req->error_loc =
78 offsetof(struct nvmf_property_get_command, attrib);
79 }
80
81 req->cqe->result.u64 = cpu_to_le64(val);
82 nvmet_req_complete(req, status);
83}
84
85u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req)
86{
87 struct nvme_command *cmd = req->cmd;
88
89 switch (cmd->fabrics.fctype) {
90 case nvme_fabrics_type_property_set:
91 req->execute = nvmet_execute_prop_set;
92 break;
93 case nvme_fabrics_type_property_get:
94 req->execute = nvmet_execute_prop_get;
95 break;
96 default:
97 pr_debug("received unknown capsule type 0x%x\n",
98 cmd->fabrics.fctype);
99 req->error_loc = offsetof(struct nvmf_common_command, fctype);
100 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
101 }
102
103 return 0;
104}
105
106static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
107{
108 struct nvmf_connect_command *c = &req->cmd->connect;
109 u16 qid = le16_to_cpu(c->qid);
110 u16 sqsize = le16_to_cpu(c->sqsize);
111 struct nvmet_ctrl *old;
112 u16 mqes = NVME_CAP_MQES(ctrl->cap);
113 u16 ret;
114
115 if (!sqsize) {
116 pr_warn("queue size zero!\n");
117 req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
118 req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
119 ret = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
120 goto err;
121 }
122
123 if (ctrl->sqs[qid] != NULL) {
124 pr_warn("qid %u has already been created\n", qid);
125 req->error_loc = offsetof(struct nvmf_connect_command, qid);
126 return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
127 }
128
129 if (sqsize > mqes) {
130 pr_warn("sqsize %u is larger than MQES supported %u cntlid %d\n",
131 sqsize, mqes, ctrl->cntlid);
132 req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
133 req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
134 return NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
135 }
136
137 old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
138 if (old) {
139 pr_warn("queue already connected!\n");
140 req->error_loc = offsetof(struct nvmf_connect_command, opcode);
141 return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
142 }
143
144
145 nvmet_cq_setup(ctrl, req->cq, qid, sqsize + 1);
146 nvmet_sq_setup(ctrl, req->sq, qid, sqsize + 1);
147
148 if (c->cattr & NVME_CONNECT_DISABLE_SQFLOW) {
149 req->sq->sqhd_disabled = true;
150 req->cqe->sq_head = cpu_to_le16(0xffff);
151 }
152
153 if (ctrl->ops->install_queue) {
154 ret = ctrl->ops->install_queue(req->sq);
155 if (ret) {
156 pr_err("failed to install queue %d cntlid %d ret %x\n",
157 qid, ctrl->cntlid, ret);
158 ctrl->sqs[qid] = NULL;
159 goto err;
160 }
161 }
162
163 return 0;
164
165err:
166 req->sq->ctrl = NULL;
167 return ret;
168}
169
170static void nvmet_execute_admin_connect(struct nvmet_req *req)
171{
172 struct nvmf_connect_command *c = &req->cmd->connect;
173 struct nvmf_connect_data *d;
174 struct nvmet_ctrl *ctrl = NULL;
175 u16 status = 0;
176
177 if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data)))
178 return;
179
180 d = kmalloc(sizeof(*d), GFP_KERNEL);
181 if (!d) {
182 status = NVME_SC_INTERNAL;
183 goto complete;
184 }
185
186 status = nvmet_copy_from_sgl(req, 0, d, sizeof(*d));
187 if (status)
188 goto out;
189
190
191 req->cqe->result.u32 = 0;
192
193 if (c->recfmt != 0) {
194 pr_warn("invalid connect version (%d).\n",
195 le16_to_cpu(c->recfmt));
196 req->error_loc = offsetof(struct nvmf_connect_command, recfmt);
197 status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
198 goto out;
199 }
200
201 if (unlikely(d->cntlid != cpu_to_le16(0xffff))) {
202 pr_warn("connect attempt for invalid controller ID %#x\n",
203 d->cntlid);
204 status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
205 req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(cntlid);
206 goto out;
207 }
208
209 status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req,
210 le32_to_cpu(c->kato), &ctrl);
211 if (status)
212 goto out;
213
214 ctrl->pi_support = ctrl->port->pi_enable && ctrl->subsys->pi_support;
215
216 uuid_copy(&ctrl->hostid, &d->hostid);
217
218 status = nvmet_install_queue(ctrl, req);
219 if (status) {
220 nvmet_ctrl_put(ctrl);
221 goto out;
222 }
223
224 pr_info("creating controller %d for subsystem %s for NQN %s%s.\n",
225 ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn,
226 ctrl->pi_support ? " T10-PI is enabled" : "");
227 req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
228
229out:
230 kfree(d);
231complete:
232 nvmet_req_complete(req, status);
233}
234
235static void nvmet_execute_io_connect(struct nvmet_req *req)
236{
237 struct nvmf_connect_command *c = &req->cmd->connect;
238 struct nvmf_connect_data *d;
239 struct nvmet_ctrl *ctrl;
240 u16 qid = le16_to_cpu(c->qid);
241 u16 status = 0;
242
243 if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data)))
244 return;
245
246 d = kmalloc(sizeof(*d), GFP_KERNEL);
247 if (!d) {
248 status = NVME_SC_INTERNAL;
249 goto complete;
250 }
251
252 status = nvmet_copy_from_sgl(req, 0, d, sizeof(*d));
253 if (status)
254 goto out;
255
256
257 req->cqe->result.u32 = 0;
258
259 if (c->recfmt != 0) {
260 pr_warn("invalid connect version (%d).\n",
261 le16_to_cpu(c->recfmt));
262 status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
263 goto out;
264 }
265
266 ctrl = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn,
267 le16_to_cpu(d->cntlid), req);
268 if (!ctrl) {
269 status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
270 goto out;
271 }
272
273 if (unlikely(qid > ctrl->subsys->max_qid)) {
274 pr_warn("invalid queue id (%d)\n", qid);
275 status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
276 req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(qid);
277 goto out_ctrl_put;
278 }
279
280 status = nvmet_install_queue(ctrl, req);
281 if (status)
282 goto out_ctrl_put;
283
284
285 req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
286
287 pr_debug("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid);
288
289out:
290 kfree(d);
291complete:
292 nvmet_req_complete(req, status);
293 return;
294
295out_ctrl_put:
296 nvmet_ctrl_put(ctrl);
297 goto out;
298}
299
300u16 nvmet_parse_connect_cmd(struct nvmet_req *req)
301{
302 struct nvme_command *cmd = req->cmd;
303
304 if (!nvme_is_fabrics(cmd)) {
305 pr_debug("invalid command 0x%x on unconnected queue.\n",
306 cmd->fabrics.opcode);
307 req->error_loc = offsetof(struct nvme_common_command, opcode);
308 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
309 }
310 if (cmd->fabrics.fctype != nvme_fabrics_type_connect) {
311 pr_debug("invalid capsule type 0x%x on unconnected queue.\n",
312 cmd->fabrics.fctype);
313 req->error_loc = offsetof(struct nvmf_common_command, fctype);
314 return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
315 }
316
317 if (cmd->connect.qid == 0)
318 req->execute = nvmet_execute_admin_connect;
319 else
320 req->execute = nvmet_execute_io_connect;
321 return 0;
322}
323
