1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* NVMe Fabrics command implementation.
* Copyright (c) 2015-2016 HGST, a Western Digital Company.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/blkdev.h>
#include "nvmet.h"
static void nvmet_execute_prop_set(struct nvmet_req *req)
{
u16 status = 0;
if (!(req->cmd->prop_set.attrib & 1)) {
u64 val = le64_to_cpu(req->cmd->prop_set.value);
switch (le32_to_cpu(req->cmd->prop_set.offset)) {
case NVME_REG_CC:
nvmet_update_cc(req->sq->ctrl, val);
break;
default:
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
} else {
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
}
nvmet_req_complete(req, status);
}
static void nvmet_execute_prop_get(struct nvmet_req *req)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
u16 status = 0;
u64 val = 0;
if (req->cmd->prop_get.attrib & 1) {
switch (le32_to_cpu(req->cmd->prop_get.offset)) {
case NVME_REG_CAP:
val = ctrl->cap;
break;
default:
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
} else {
switch (le32_to_cpu(req->cmd->prop_get.offset)) {
case NVME_REG_VS:
val = ctrl->subsys->ver;
break;
case NVME_REG_CC:
val = ctrl->cc;
break;
case NVME_REG_CSTS:
val = ctrl->csts;
break;
default:
status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
break;
}
}
req->rsp->result.u64 = cpu_to_le64(val);
nvmet_req_complete(req, status);
}
int nvmet_parse_fabrics_cmd(struct nvmet_req *req)
{
struct nvme_command *cmd = req->cmd;
req->ns = NULL;
switch (cmd->fabrics.fctype) {
case nvme_fabrics_type_property_set:
req->data_len = 0;
req->execute = nvmet_execute_prop_set;
break;
case nvme_fabrics_type_property_get:
req->data_len = 0;
req->execute = nvmet_execute_prop_get;
break;
default:
pr_err("received unknown capsule type 0x%x\n",
cmd->fabrics.fctype);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
return 0;
}
static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
{
struct nvmf_connect_command *c = &req->cmd->connect;
u16 qid = le16_to_cpu(c->qid);
u16 sqsize = le16_to_cpu(c->sqsize);
struct nvmet_ctrl *old;
old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
if (old) {
pr_warn("queue already connected!\n");
return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
}
nvmet_cq_setup(ctrl, req->cq, qid, sqsize);
nvmet_sq_setup(ctrl, req->sq, qid, sqsize);
return 0;
}
static void nvmet_execute_admin_connect(struct nvmet_req *req)
{
struct nvmf_connect_command *c = &req->cmd->connect;
struct nvmf_connect_data *d;
struct nvmet_ctrl *ctrl = NULL;
u16 status = 0;
d = kmap(sg_page(req->sg)) + req->sg->offset;
/* zero out initial completion result, assign values as needed */
req->rsp->result.u32 = 0;
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));
status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
goto out;
}
if (unlikely(d->cntlid != cpu_to_le16(0xffff))) {
pr_warn("connect attempt for invalid controller ID %#x\n",
d->cntlid);
status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
req->rsp->result.u32 = IPO_IATTR_CONNECT_DATA(cntlid);
goto out;
}
status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req,
le32_to_cpu(c->kato), &ctrl);
if (status)
goto out;
status = nvmet_install_queue(ctrl, req);
if (status) {
nvmet_ctrl_put(ctrl);
goto out;
}
pr_info("creating controller %d for NQN %s.\n",
ctrl->cntlid, ctrl->hostnqn);
req->rsp->result.u16 = cpu_to_le16(ctrl->cntlid);
out:
kunmap(sg_page(req->sg));
nvmet_req_complete(req, status);
}
static void nvmet_execute_io_connect(struct nvmet_req *req)
{
struct nvmf_connect_command *c = &req->cmd->connect;
struct nvmf_connect_data *d;
struct nvmet_ctrl *ctrl = NULL;
u16 qid = le16_to_cpu(c->qid);
u16 status = 0;
d = kmap(sg_page(req->sg)) + req->sg->offset;
/* zero out initial completion result, assign values as needed */
req->rsp->result.u32 = 0;
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));
status = NVME_SC_CONNECT_FORMAT | NVME_SC_DNR;
goto out;
}
status = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn,
le16_to_cpu(d->cntlid),
req, &ctrl);
if (status)
goto out;
if (unlikely(qid > ctrl->subsys->max_qid)) {
pr_warn("invalid queue id (%d)\n", qid);
status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
req->rsp->result.u32 = IPO_IATTR_CONNECT_SQE(qid);
goto out_ctrl_put;
}
status = nvmet_install_queue(ctrl, req);
if (status) {
/* pass back cntlid that had the issue of installing queue */
req->rsp->result.u16 = cpu_to_le16(ctrl->cntlid);
goto out_ctrl_put;
}
pr_info("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid);
out:
kunmap(sg_page(req->sg));
nvmet_req_complete(req, status);
return;
out_ctrl_put:
nvmet_ctrl_put(ctrl);
goto out;
}
int nvmet_parse_connect_cmd(struct nvmet_req *req)
{
struct nvme_command *cmd = req->cmd;
req->ns = NULL;
if (req->cmd->common.opcode != nvme_fabrics_command) {
pr_err("invalid command 0x%x on unconnected queue.\n",
cmd->fabrics.opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
if (cmd->fabrics.fctype != nvme_fabrics_type_connect) {
pr_err("invalid capsule type 0x%x on unconnected queue.\n",
cmd->fabrics.fctype);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
req->data_len = sizeof(struct nvmf_connect_data);
if (cmd->connect.qid == 0)
req->execute = nvmet_execute_admin_connect;
else
req->execute = nvmet_execute_io_connect;
return 0;
}
|
