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Commit | Line | Data |
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6c80b41a LR |
1 | /* |
2 | * Copyright (c) 2017 Mellanox Technologies. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions are met: | |
6 | * | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * 3. Neither the names of the copyright holders nor the names of its | |
13 | * contributors may be used to endorse or promote products derived from | |
14 | * this software without specific prior written permission. | |
15 | * | |
16 | * Alternatively, this software may be distributed under the terms of the | |
17 | * GNU General Public License ("GPL") version 2 as published by the Free | |
18 | * Software Foundation. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
24 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
30 | * POSSIBILITY OF SUCH DAMAGE. | |
31 | */ | |
32 | ||
e3bf14bd | 33 | #include <linux/module.h> |
b4c598a6 | 34 | #include <net/netlink.h> |
6c80b41a LR |
35 | #include <rdma/rdma_netlink.h> |
36 | ||
37 | #include "core_priv.h" | |
38 | ||
b4c598a6 LR |
39 | static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = { |
40 | [RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 }, | |
41 | [RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, | |
42 | .len = IB_DEVICE_NAME_MAX - 1}, | |
43 | [RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 }, | |
8621a7e3 LR |
44 | [RDMA_NLDEV_ATTR_FW_VERSION] = { .type = NLA_NUL_STRING, |
45 | .len = IB_FW_VERSION_NAME_MAX - 1}, | |
1aaff896 LR |
46 | [RDMA_NLDEV_ATTR_NODE_GUID] = { .type = NLA_U64 }, |
47 | [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 }, | |
12026fbb | 48 | [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 }, |
80a06dd3 LR |
49 | [RDMA_NLDEV_ATTR_LID] = { .type = NLA_U32 }, |
50 | [RDMA_NLDEV_ATTR_SM_LID] = { .type = NLA_U32 }, | |
34840fea | 51 | [RDMA_NLDEV_ATTR_LMC] = { .type = NLA_U8 }, |
5654e49d LR |
52 | [RDMA_NLDEV_ATTR_PORT_STATE] = { .type = NLA_U8 }, |
53 | [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = { .type = NLA_U8 }, | |
1bb77b8c | 54 | [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = { .type = NLA_U8 }, |
b4c598a6 LR |
55 | }; |
56 | ||
57 | static int fill_dev_info(struct sk_buff *msg, struct ib_device *device) | |
58 | { | |
8621a7e3 LR |
59 | char fw[IB_FW_VERSION_NAME_MAX]; |
60 | ||
b4c598a6 LR |
61 | if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index)) |
62 | return -EMSGSIZE; | |
63 | if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name)) | |
64 | return -EMSGSIZE; | |
65 | if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device))) | |
66 | return -EMSGSIZE; | |
ac505253 LR |
67 | |
68 | BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64)); | |
69 | if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS, | |
70 | device->attrs.device_cap_flags, 0)) | |
71 | return -EMSGSIZE; | |
72 | ||
8621a7e3 LR |
73 | ib_get_device_fw_str(device, fw); |
74 | /* Device without FW has strlen(fw) */ | |
75 | if (strlen(fw) && nla_put_string(msg, RDMA_NLDEV_ATTR_FW_VERSION, fw)) | |
76 | return -EMSGSIZE; | |
77 | ||
1aaff896 LR |
78 | if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID, |
79 | be64_to_cpu(device->node_guid), 0)) | |
80 | return -EMSGSIZE; | |
81 | if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID, | |
82 | be64_to_cpu(device->attrs.sys_image_guid), 0)) | |
83 | return -EMSGSIZE; | |
1bb77b8c LR |
84 | if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type)) |
85 | return -EMSGSIZE; | |
b4c598a6 LR |
86 | return 0; |
87 | } | |
88 | ||
7d02f605 LR |
89 | static int fill_port_info(struct sk_buff *msg, |
90 | struct ib_device *device, u32 port) | |
91 | { | |
ac505253 LR |
92 | struct ib_port_attr attr; |
93 | int ret; | |
94 | ||
7d02f605 LR |
95 | if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index)) |
96 | return -EMSGSIZE; | |
97 | if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name)) | |
98 | return -EMSGSIZE; | |
99 | if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) | |
100 | return -EMSGSIZE; | |
ac505253 LR |
101 | |
102 | ret = ib_query_port(device, port, &attr); | |
103 | if (ret) | |
104 | return ret; | |
105 | ||
106 | BUILD_BUG_ON(sizeof(attr.port_cap_flags) > sizeof(u64)); | |
107 | if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS, | |
108 | (u64)attr.port_cap_flags, 0)) | |
109 | return -EMSGSIZE; | |
12026fbb LR |
110 | if (rdma_protocol_ib(device, port) && |
111 | nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX, | |
112 | attr.subnet_prefix, 0)) | |
113 | return -EMSGSIZE; | |
80a06dd3 LR |
114 | if (rdma_protocol_ib(device, port)) { |
115 | if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid)) | |
116 | return -EMSGSIZE; | |
117 | if (nla_put_u32(msg, RDMA_NLDEV_ATTR_SM_LID, attr.sm_lid)) | |
118 | return -EMSGSIZE; | |
34840fea LR |
119 | if (nla_put_u8(msg, RDMA_NLDEV_ATTR_LMC, attr.lmc)) |
120 | return -EMSGSIZE; | |
80a06dd3 | 121 | } |
5654e49d LR |
122 | if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_STATE, attr.state)) |
123 | return -EMSGSIZE; | |
124 | if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_PHYS_STATE, attr.phys_state)) | |
125 | return -EMSGSIZE; | |
7d02f605 LR |
126 | return 0; |
127 | } | |
128 | ||
e5c9469e LR |
129 | static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, |
130 | struct netlink_ext_ack *extack) | |
131 | { | |
132 | struct nlattr *tb[RDMA_NLDEV_ATTR_MAX]; | |
133 | struct ib_device *device; | |
134 | struct sk_buff *msg; | |
135 | u32 index; | |
136 | int err; | |
137 | ||
138 | err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, | |
139 | nldev_policy, extack); | |
140 | if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX]) | |
141 | return -EINVAL; | |
142 | ||
143 | index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]); | |
144 | ||
145 | device = __ib_device_get_by_index(index); | |
146 | if (!device) | |
147 | return -EINVAL; | |
148 | ||
149 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
150 | if (!msg) | |
151 | return -ENOMEM; | |
152 | ||
153 | nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, | |
154 | RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), | |
155 | 0, 0); | |
156 | ||
157 | err = fill_dev_info(msg, device); | |
158 | if (err) { | |
159 | nlmsg_free(msg); | |
160 | return err; | |
161 | } | |
162 | ||
163 | nlmsg_end(msg, nlh); | |
164 | ||
165 | return rdma_nl_unicast(msg, NETLINK_CB(skb).portid); | |
166 | } | |
167 | ||
b4c598a6 LR |
168 | static int _nldev_get_dumpit(struct ib_device *device, |
169 | struct sk_buff *skb, | |
170 | struct netlink_callback *cb, | |
171 | unsigned int idx) | |
172 | { | |
173 | int start = cb->args[0]; | |
174 | struct nlmsghdr *nlh; | |
175 | ||
176 | if (idx < start) | |
177 | return 0; | |
178 | ||
179 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
180 | RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), | |
181 | 0, NLM_F_MULTI); | |
182 | ||
183 | if (fill_dev_info(skb, device)) { | |
184 | nlmsg_cancel(skb, nlh); | |
185 | goto out; | |
186 | } | |
187 | ||
188 | nlmsg_end(skb, nlh); | |
189 | ||
190 | idx++; | |
191 | ||
192 | out: cb->args[0] = idx; | |
193 | return skb->len; | |
194 | } | |
195 | ||
196 | static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) | |
197 | { | |
198 | /* | |
199 | * There is no need to take lock, because | |
200 | * we are relying on ib_core's lists_rwsem | |
201 | */ | |
202 | return ib_enum_all_devs(_nldev_get_dumpit, skb, cb); | |
203 | } | |
204 | ||
c3f66f7b LR |
205 | static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, |
206 | struct netlink_ext_ack *extack) | |
207 | { | |
208 | struct nlattr *tb[RDMA_NLDEV_ATTR_MAX]; | |
209 | struct ib_device *device; | |
210 | struct sk_buff *msg; | |
211 | u32 index; | |
212 | u32 port; | |
213 | int err; | |
214 | ||
215 | err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, | |
216 | nldev_policy, extack); | |
287683d0 LR |
217 | if (err || |
218 | !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || | |
219 | !tb[RDMA_NLDEV_ATTR_PORT_INDEX]) | |
c3f66f7b LR |
220 | return -EINVAL; |
221 | ||
222 | index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]); | |
223 | device = __ib_device_get_by_index(index); | |
224 | if (!device) | |
225 | return -EINVAL; | |
226 | ||
227 | port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]); | |
228 | if (!rdma_is_port_valid(device, port)) | |
229 | return -EINVAL; | |
230 | ||
231 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
232 | if (!msg) | |
233 | return -ENOMEM; | |
234 | ||
235 | nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, | |
236 | RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), | |
237 | 0, 0); | |
238 | ||
239 | err = fill_port_info(msg, device, port); | |
240 | if (err) { | |
241 | nlmsg_free(msg); | |
242 | return err; | |
243 | } | |
244 | ||
245 | nlmsg_end(msg, nlh); | |
246 | ||
247 | return rdma_nl_unicast(msg, NETLINK_CB(skb).portid); | |
248 | } | |
249 | ||
7d02f605 LR |
250 | static int nldev_port_get_dumpit(struct sk_buff *skb, |
251 | struct netlink_callback *cb) | |
252 | { | |
253 | struct nlattr *tb[RDMA_NLDEV_ATTR_MAX]; | |
254 | struct ib_device *device; | |
255 | int start = cb->args[0]; | |
256 | struct nlmsghdr *nlh; | |
257 | u32 idx = 0; | |
258 | u32 ifindex; | |
259 | int err; | |
260 | u32 p; | |
261 | ||
262 | err = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, | |
263 | nldev_policy, NULL); | |
264 | if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX]) | |
265 | return -EINVAL; | |
266 | ||
267 | ifindex = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]); | |
268 | device = __ib_device_get_by_index(ifindex); | |
269 | if (!device) | |
270 | return -EINVAL; | |
271 | ||
272 | for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) { | |
273 | /* | |
274 | * The dumpit function returns all information from specific | |
275 | * index. This specific index is taken from the netlink | |
276 | * messages request sent by user and it is available | |
277 | * in cb->args[0]. | |
278 | * | |
279 | * Usually, the user doesn't fill this field and it causes | |
280 | * to return everything. | |
281 | * | |
282 | */ | |
283 | if (idx < start) { | |
284 | idx++; | |
285 | continue; | |
286 | } | |
287 | ||
288 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
289 | cb->nlh->nlmsg_seq, | |
290 | RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, | |
291 | RDMA_NLDEV_CMD_PORT_GET), | |
292 | 0, NLM_F_MULTI); | |
293 | ||
294 | if (fill_port_info(skb, device, p)) { | |
295 | nlmsg_cancel(skb, nlh); | |
296 | goto out; | |
297 | } | |
298 | idx++; | |
299 | nlmsg_end(skb, nlh); | |
300 | } | |
301 | ||
302 | out: cb->args[0] = idx; | |
303 | return skb->len; | |
304 | } | |
305 | ||
d0e312fe | 306 | static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { |
b4c598a6 | 307 | [RDMA_NLDEV_CMD_GET] = { |
e5c9469e | 308 | .doit = nldev_get_doit, |
b4c598a6 LR |
309 | .dump = nldev_get_dumpit, |
310 | }, | |
7d02f605 | 311 | [RDMA_NLDEV_CMD_PORT_GET] = { |
c3f66f7b | 312 | .doit = nldev_port_get_doit, |
7d02f605 LR |
313 | .dump = nldev_port_get_dumpit, |
314 | }, | |
b4c598a6 LR |
315 | }; |
316 | ||
6c80b41a LR |
317 | void __init nldev_init(void) |
318 | { | |
b4c598a6 | 319 | rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table); |
6c80b41a LR |
320 | } |
321 | ||
322 | void __exit nldev_exit(void) | |
323 | { | |
324 | rdma_nl_unregister(RDMA_NL_NLDEV); | |
325 | } | |
e3bf14bd JG |
326 | |
327 | MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5); |