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
33 #include <linux/module.h>
34 #include <linux/pid.h>
35 #include <linux/pid_namespace.h>
36 #include <linux/mutex.h>
37 #include <net/netlink.h>
38 #include <rdma/rdma_cm.h>
39 #include <rdma/rdma_netlink.h>
40
41 #include "core_priv.h"
42 #include "cma_priv.h"
43 #include "restrack.h"
44 #include "uverbs.h"
45
46 /*
47 * This determines whether a non-privileged user is allowed to specify a
48 * controlled QKEY or not, when true non-privileged user is allowed to specify
49 * a controlled QKEY.
50 */
51 static bool privileged_qkey;
52
53 typedef int (*res_fill_func_t)(struct sk_buff*, bool,
54 struct rdma_restrack_entry*, uint32_t);
55
56 /*
57 * Sort array elements by the netlink attribute name
58 */
59 static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
60 [RDMA_NLDEV_ATTR_CHARDEV] = { .type = NLA_U64 },
61 [RDMA_NLDEV_ATTR_CHARDEV_ABI] = { .type = NLA_U64 },
62 [RDMA_NLDEV_ATTR_CHARDEV_NAME] = { .type = NLA_NUL_STRING,
63 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
64 [RDMA_NLDEV_ATTR_CHARDEV_TYPE] = { .type = NLA_NUL_STRING,
65 .len = RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE },
66 [RDMA_NLDEV_ATTR_DEV_DIM] = { .type = NLA_U8 },
67 [RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
68 [RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
69 .len = IB_DEVICE_NAME_MAX },
70 [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = { .type = NLA_U8 },
71 [RDMA_NLDEV_ATTR_DEV_PROTOCOL] = { .type = NLA_NUL_STRING,
72 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
73 [RDMA_NLDEV_ATTR_DRIVER] = { .type = NLA_NESTED },
74 [RDMA_NLDEV_ATTR_DRIVER_ENTRY] = { .type = NLA_NESTED },
75 [RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE] = { .type = NLA_U8 },
76 [RDMA_NLDEV_ATTR_DRIVER_STRING] = { .type = NLA_NUL_STRING,
77 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
78 [RDMA_NLDEV_ATTR_DRIVER_S32] = { .type = NLA_S32 },
79 [RDMA_NLDEV_ATTR_DRIVER_S64] = { .type = NLA_S64 },
80 [RDMA_NLDEV_ATTR_DRIVER_U32] = { .type = NLA_U32 },
81 [RDMA_NLDEV_ATTR_DRIVER_U64] = { .type = NLA_U64 },
82 [RDMA_NLDEV_ATTR_FW_VERSION] = { .type = NLA_NUL_STRING,
83 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
84 [RDMA_NLDEV_ATTR_LID] = { .type = NLA_U32 },
85 [RDMA_NLDEV_ATTR_LINK_TYPE] = { .type = NLA_NUL_STRING,
86 .len = IFNAMSIZ },
87 [RDMA_NLDEV_ATTR_LMC] = { .type = NLA_U8 },
88 [RDMA_NLDEV_ATTR_NDEV_INDEX] = { .type = NLA_U32 },
89 [RDMA_NLDEV_ATTR_NDEV_NAME] = { .type = NLA_NUL_STRING,
90 .len = IFNAMSIZ },
91 [RDMA_NLDEV_ATTR_NODE_GUID] = { .type = NLA_U64 },
92 [RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 },
93 [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = { .type = NLA_U8 },
94 [RDMA_NLDEV_ATTR_PORT_STATE] = { .type = NLA_U8 },
95 [RDMA_NLDEV_ATTR_RES_CM_ID] = { .type = NLA_NESTED },
96 [RDMA_NLDEV_ATTR_RES_CM_IDN] = { .type = NLA_U32 },
97 [RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY] = { .type = NLA_NESTED },
98 [RDMA_NLDEV_ATTR_RES_CQ] = { .type = NLA_NESTED },
99 [RDMA_NLDEV_ATTR_RES_CQE] = { .type = NLA_U32 },
100 [RDMA_NLDEV_ATTR_RES_CQN] = { .type = NLA_U32 },
101 [RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = { .type = NLA_NESTED },
102 [RDMA_NLDEV_ATTR_RES_CTX] = { .type = NLA_NESTED },
103 [RDMA_NLDEV_ATTR_RES_CTXN] = { .type = NLA_U32 },
104 [RDMA_NLDEV_ATTR_RES_CTX_ENTRY] = { .type = NLA_NESTED },
105 [RDMA_NLDEV_ATTR_RES_DST_ADDR] = {
106 .len = sizeof(struct __kernel_sockaddr_storage) },
107 [RDMA_NLDEV_ATTR_RES_IOVA] = { .type = NLA_U64 },
108 [RDMA_NLDEV_ATTR_RES_KERN_NAME] = { .type = NLA_NUL_STRING,
109 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
110 [RDMA_NLDEV_ATTR_RES_LKEY] = { .type = NLA_U32 },
111 [RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY] = { .type = NLA_U32 },
112 [RDMA_NLDEV_ATTR_RES_LQPN] = { .type = NLA_U32 },
113 [RDMA_NLDEV_ATTR_RES_MR] = { .type = NLA_NESTED },
114 [RDMA_NLDEV_ATTR_RES_MRLEN] = { .type = NLA_U64 },
115 [RDMA_NLDEV_ATTR_RES_MRN] = { .type = NLA_U32 },
116 [RDMA_NLDEV_ATTR_RES_MR_ENTRY] = { .type = NLA_NESTED },
117 [RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE] = { .type = NLA_U8 },
118 [RDMA_NLDEV_ATTR_RES_PD] = { .type = NLA_NESTED },
119 [RDMA_NLDEV_ATTR_RES_PDN] = { .type = NLA_U32 },
120 [RDMA_NLDEV_ATTR_RES_PD_ENTRY] = { .type = NLA_NESTED },
121 [RDMA_NLDEV_ATTR_RES_PID] = { .type = NLA_U32 },
122 [RDMA_NLDEV_ATTR_RES_POLL_CTX] = { .type = NLA_U8 },
123 [RDMA_NLDEV_ATTR_RES_PS] = { .type = NLA_U32 },
124 [RDMA_NLDEV_ATTR_RES_QP] = { .type = NLA_NESTED },
125 [RDMA_NLDEV_ATTR_RES_QP_ENTRY] = { .type = NLA_NESTED },
126 [RDMA_NLDEV_ATTR_RES_RAW] = { .type = NLA_BINARY },
127 [RDMA_NLDEV_ATTR_RES_RKEY] = { .type = NLA_U32 },
128 [RDMA_NLDEV_ATTR_RES_RQPN] = { .type = NLA_U32 },
129 [RDMA_NLDEV_ATTR_RES_RQ_PSN] = { .type = NLA_U32 },
130 [RDMA_NLDEV_ATTR_RES_SQ_PSN] = { .type = NLA_U32 },
131 [RDMA_NLDEV_ATTR_RES_SRC_ADDR] = {
132 .len = sizeof(struct __kernel_sockaddr_storage) },
133 [RDMA_NLDEV_ATTR_RES_STATE] = { .type = NLA_U8 },
134 [RDMA_NLDEV_ATTR_RES_SUMMARY] = { .type = NLA_NESTED },
135 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY] = { .type = NLA_NESTED },
136 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR]= { .type = NLA_U64 },
137 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME]= { .type = NLA_NUL_STRING,
138 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
139 [RDMA_NLDEV_ATTR_RES_TYPE] = { .type = NLA_U8 },
140 [RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]= { .type = NLA_U32 },
141 [RDMA_NLDEV_ATTR_RES_USECNT] = { .type = NLA_U64 },
142 [RDMA_NLDEV_ATTR_RES_SRQ] = { .type = NLA_NESTED },
143 [RDMA_NLDEV_ATTR_RES_SRQN] = { .type = NLA_U32 },
144 [RDMA_NLDEV_ATTR_RES_SRQ_ENTRY] = { .type = NLA_NESTED },
145 [RDMA_NLDEV_ATTR_MIN_RANGE] = { .type = NLA_U32 },
146 [RDMA_NLDEV_ATTR_MAX_RANGE] = { .type = NLA_U32 },
147 [RDMA_NLDEV_ATTR_SM_LID] = { .type = NLA_U32 },
148 [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 },
149 [RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK] = { .type = NLA_U32 },
150 [RDMA_NLDEV_ATTR_STAT_MODE] = { .type = NLA_U32 },
151 [RDMA_NLDEV_ATTR_STAT_RES] = { .type = NLA_U32 },
152 [RDMA_NLDEV_ATTR_STAT_COUNTER] = { .type = NLA_NESTED },
153 [RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY] = { .type = NLA_NESTED },
154 [RDMA_NLDEV_ATTR_STAT_COUNTER_ID] = { .type = NLA_U32 },
155 [RDMA_NLDEV_ATTR_STAT_HWCOUNTERS] = { .type = NLA_NESTED },
156 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY] = { .type = NLA_NESTED },
157 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME] = { .type = NLA_NUL_STRING },
158 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE] = { .type = NLA_U64 },
159 [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 },
160 [RDMA_NLDEV_ATTR_UVERBS_DRIVER_ID] = { .type = NLA_U32 },
161 [RDMA_NLDEV_NET_NS_FD] = { .type = NLA_U32 },
162 [RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = { .type = NLA_U8 },
163 [RDMA_NLDEV_SYS_ATTR_COPY_ON_FORK] = { .type = NLA_U8 },
164 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_INDEX] = { .type = NLA_U32 },
165 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC] = { .type = NLA_U8 },
166 [RDMA_NLDEV_SYS_ATTR_PRIVILEGED_QKEY_MODE] = { .type = NLA_U8 },
167 };
168
put_driver_name_print_type(struct sk_buff * msg,const char * name,enum rdma_nldev_print_type print_type)169 static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
170 enum rdma_nldev_print_type print_type)
171 {
172 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DRIVER_STRING, name))
173 return -EMSGSIZE;
174 if (print_type != RDMA_NLDEV_PRINT_TYPE_UNSPEC &&
175 nla_put_u8(msg, RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE, print_type))
176 return -EMSGSIZE;
177
178 return 0;
179 }
180
_rdma_nl_put_driver_u32(struct sk_buff * msg,const char * name,enum rdma_nldev_print_type print_type,u32 value)181 static int _rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name,
182 enum rdma_nldev_print_type print_type,
183 u32 value)
184 {
185 if (put_driver_name_print_type(msg, name, print_type))
186 return -EMSGSIZE;
187 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DRIVER_U32, value))
188 return -EMSGSIZE;
189
190 return 0;
191 }
192
_rdma_nl_put_driver_u64(struct sk_buff * msg,const char * name,enum rdma_nldev_print_type print_type,u64 value)193 static int _rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name,
194 enum rdma_nldev_print_type print_type,
195 u64 value)
196 {
197 if (put_driver_name_print_type(msg, name, print_type))
198 return -EMSGSIZE;
199 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_DRIVER_U64, value,
200 RDMA_NLDEV_ATTR_PAD))
201 return -EMSGSIZE;
202
203 return 0;
204 }
205
rdma_nl_put_driver_string(struct sk_buff * msg,const char * name,const char * str)206 int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name,
207 const char *str)
208 {
209 if (put_driver_name_print_type(msg, name,
210 RDMA_NLDEV_PRINT_TYPE_UNSPEC))
211 return -EMSGSIZE;
212 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DRIVER_STRING, str))
213 return -EMSGSIZE;
214
215 return 0;
216 }
217 EXPORT_SYMBOL(rdma_nl_put_driver_string);
218
rdma_nl_put_driver_u32(struct sk_buff * msg,const char * name,u32 value)219 int rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name, u32 value)
220 {
221 return _rdma_nl_put_driver_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_UNSPEC,
222 value);
223 }
224 EXPORT_SYMBOL(rdma_nl_put_driver_u32);
225
rdma_nl_put_driver_u32_hex(struct sk_buff * msg,const char * name,u32 value)226 int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name,
227 u32 value)
228 {
229 return _rdma_nl_put_driver_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
230 value);
231 }
232 EXPORT_SYMBOL(rdma_nl_put_driver_u32_hex);
233
rdma_nl_put_driver_u64(struct sk_buff * msg,const char * name,u64 value)234 int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value)
235 {
236 return _rdma_nl_put_driver_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_UNSPEC,
237 value);
238 }
239 EXPORT_SYMBOL(rdma_nl_put_driver_u64);
240
rdma_nl_put_driver_u64_hex(struct sk_buff * msg,const char * name,u64 value)241 int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name, u64 value)
242 {
243 return _rdma_nl_put_driver_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
244 value);
245 }
246 EXPORT_SYMBOL(rdma_nl_put_driver_u64_hex);
247
rdma_nl_get_privileged_qkey(void)248 bool rdma_nl_get_privileged_qkey(void)
249 {
250 return privileged_qkey || capable(CAP_NET_RAW);
251 }
252 EXPORT_SYMBOL(rdma_nl_get_privileged_qkey);
253
fill_nldev_handle(struct sk_buff * msg,struct ib_device * device)254 static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
255 {
256 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
257 return -EMSGSIZE;
258 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME,
259 dev_name(&device->dev)))
260 return -EMSGSIZE;
261
262 return 0;
263 }
264
fill_dev_info(struct sk_buff * msg,struct ib_device * device)265 static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
266 {
267 char fw[IB_FW_VERSION_NAME_MAX];
268 int ret = 0;
269 u32 port;
270
271 if (fill_nldev_handle(msg, device))
272 return -EMSGSIZE;
273
274 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
275 return -EMSGSIZE;
276
277 BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64));
278 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
279 device->attrs.device_cap_flags,
280 RDMA_NLDEV_ATTR_PAD))
281 return -EMSGSIZE;
282
283 ib_get_device_fw_str(device, fw);
284 /* Device without FW has strlen(fw) = 0 */
285 if (strlen(fw) && nla_put_string(msg, RDMA_NLDEV_ATTR_FW_VERSION, fw))
286 return -EMSGSIZE;
287
288 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID,
289 be64_to_cpu(device->node_guid),
290 RDMA_NLDEV_ATTR_PAD))
291 return -EMSGSIZE;
292 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID,
293 be64_to_cpu(device->attrs.sys_image_guid),
294 RDMA_NLDEV_ATTR_PAD))
295 return -EMSGSIZE;
296 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
297 return -EMSGSIZE;
298 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, device->use_cq_dim))
299 return -EMSGSIZE;
300
301 /*
302 * Link type is determined on first port and mlx4 device
303 * which can potentially have two different link type for the same
304 * IB device is considered as better to be avoided in the future,
305 */
306 port = rdma_start_port(device);
307 if (rdma_cap_opa_mad(device, port))
308 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "opa");
309 else if (rdma_protocol_ib(device, port))
310 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "ib");
311 else if (rdma_protocol_iwarp(device, port))
312 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "iw");
313 else if (rdma_protocol_roce(device, port))
314 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "roce");
315 else if (rdma_protocol_usnic(device, port))
316 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL,
317 "usnic");
318 return ret;
319 }
320
fill_port_info(struct sk_buff * msg,struct ib_device * device,u32 port,const struct net * net)321 static int fill_port_info(struct sk_buff *msg,
322 struct ib_device *device, u32 port,
323 const struct net *net)
324 {
325 struct net_device *netdev = NULL;
326 struct ib_port_attr attr;
327 int ret;
328 u64 cap_flags = 0;
329
330 if (fill_nldev_handle(msg, device))
331 return -EMSGSIZE;
332
333 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
334 return -EMSGSIZE;
335
336 ret = ib_query_port(device, port, &attr);
337 if (ret)
338 return ret;
339
340 if (rdma_protocol_ib(device, port)) {
341 BUILD_BUG_ON((sizeof(attr.port_cap_flags) +
342 sizeof(attr.port_cap_flags2)) > sizeof(u64));
343 cap_flags = attr.port_cap_flags |
344 ((u64)attr.port_cap_flags2 << 32);
345 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
346 cap_flags, RDMA_NLDEV_ATTR_PAD))
347 return -EMSGSIZE;
348 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX,
349 attr.subnet_prefix, RDMA_NLDEV_ATTR_PAD))
350 return -EMSGSIZE;
351 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid))
352 return -EMSGSIZE;
353 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_SM_LID, attr.sm_lid))
354 return -EMSGSIZE;
355 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_LMC, attr.lmc))
356 return -EMSGSIZE;
357 }
358 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_STATE, attr.state))
359 return -EMSGSIZE;
360 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_PHYS_STATE, attr.phys_state))
361 return -EMSGSIZE;
362
363 netdev = ib_device_get_netdev(device, port);
364 if (netdev && net_eq(dev_net(netdev), net)) {
365 ret = nla_put_u32(msg,
366 RDMA_NLDEV_ATTR_NDEV_INDEX, netdev->ifindex);
367 if (ret)
368 goto out;
369 ret = nla_put_string(msg,
370 RDMA_NLDEV_ATTR_NDEV_NAME, netdev->name);
371 }
372
373 out:
374 dev_put(netdev);
375 return ret;
376 }
377
fill_res_info_entry(struct sk_buff * msg,const char * name,u64 curr)378 static int fill_res_info_entry(struct sk_buff *msg,
379 const char *name, u64 curr)
380 {
381 struct nlattr *entry_attr;
382
383 entry_attr = nla_nest_start_noflag(msg,
384 RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY);
385 if (!entry_attr)
386 return -EMSGSIZE;
387
388 if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME, name))
389 goto err;
390 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr,
391 RDMA_NLDEV_ATTR_PAD))
392 goto err;
393
394 nla_nest_end(msg, entry_attr);
395 return 0;
396
397 err:
398 nla_nest_cancel(msg, entry_attr);
399 return -EMSGSIZE;
400 }
401
fill_res_info(struct sk_buff * msg,struct ib_device * device)402 static int fill_res_info(struct sk_buff *msg, struct ib_device *device)
403 {
404 static const char * const names[RDMA_RESTRACK_MAX] = {
405 [RDMA_RESTRACK_PD] = "pd",
406 [RDMA_RESTRACK_CQ] = "cq",
407 [RDMA_RESTRACK_QP] = "qp",
408 [RDMA_RESTRACK_CM_ID] = "cm_id",
409 [RDMA_RESTRACK_MR] = "mr",
410 [RDMA_RESTRACK_CTX] = "ctx",
411 [RDMA_RESTRACK_SRQ] = "srq",
412 };
413
414 struct nlattr *table_attr;
415 int ret, i, curr;
416
417 if (fill_nldev_handle(msg, device))
418 return -EMSGSIZE;
419
420 table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_RES_SUMMARY);
421 if (!table_attr)
422 return -EMSGSIZE;
423
424 for (i = 0; i < RDMA_RESTRACK_MAX; i++) {
425 if (!names[i])
426 continue;
427 curr = rdma_restrack_count(device, i);
428 ret = fill_res_info_entry(msg, names[i], curr);
429 if (ret)
430 goto err;
431 }
432
433 nla_nest_end(msg, table_attr);
434 return 0;
435
436 err:
437 nla_nest_cancel(msg, table_attr);
438 return ret;
439 }
440
fill_res_name_pid(struct sk_buff * msg,struct rdma_restrack_entry * res)441 static int fill_res_name_pid(struct sk_buff *msg,
442 struct rdma_restrack_entry *res)
443 {
444 int err = 0;
445
446 /*
447 * For user resources, user is should read /proc/PID/comm to get the
448 * name of the task file.
449 */
450 if (rdma_is_kernel_res(res)) {
451 err = nla_put_string(msg, RDMA_NLDEV_ATTR_RES_KERN_NAME,
452 res->kern_name);
453 } else {
454 pid_t pid;
455
456 pid = task_pid_vnr(res->task);
457 /*
458 * Task is dead and in zombie state.
459 * There is no need to print PID anymore.
460 */
461 if (pid)
462 /*
463 * This part is racy, task can be killed and PID will
464 * be zero right here but it is ok, next query won't
465 * return PID. We don't promise real-time reflection
466 * of SW objects.
467 */
468 err = nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PID, pid);
469 }
470
471 return err ? -EMSGSIZE : 0;
472 }
473
fill_res_qp_entry_query(struct sk_buff * msg,struct rdma_restrack_entry * res,struct ib_device * dev,struct ib_qp * qp)474 static int fill_res_qp_entry_query(struct sk_buff *msg,
475 struct rdma_restrack_entry *res,
476 struct ib_device *dev,
477 struct ib_qp *qp)
478 {
479 struct ib_qp_init_attr qp_init_attr;
480 struct ib_qp_attr qp_attr;
481 int ret;
482
483 ret = ib_query_qp(qp, &qp_attr, 0, &qp_init_attr);
484 if (ret)
485 return ret;
486
487 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC) {
488 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQPN,
489 qp_attr.dest_qp_num))
490 goto err;
491 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQ_PSN,
492 qp_attr.rq_psn))
493 goto err;
494 }
495
496 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_SQ_PSN, qp_attr.sq_psn))
497 goto err;
498
499 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC ||
500 qp->qp_type == IB_QPT_XRC_INI || qp->qp_type == IB_QPT_XRC_TGT) {
501 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE,
502 qp_attr.path_mig_state))
503 goto err;
504 }
505 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, qp->qp_type))
506 goto err;
507 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, qp_attr.qp_state))
508 goto err;
509
510 if (dev->ops.fill_res_qp_entry)
511 return dev->ops.fill_res_qp_entry(msg, qp);
512 return 0;
513
514 err: return -EMSGSIZE;
515 }
516
fill_res_qp_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)517 static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
518 struct rdma_restrack_entry *res, uint32_t port)
519 {
520 struct ib_qp *qp = container_of(res, struct ib_qp, res);
521 struct ib_device *dev = qp->device;
522 int ret;
523
524 if (port && port != qp->port)
525 return -EAGAIN;
526
527 /* In create_qp() port is not set yet */
528 if (qp->port && nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, qp->port))
529 return -EMSGSIZE;
530
531 ret = nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qp->qp_num);
532 if (ret)
533 return -EMSGSIZE;
534
535 if (!rdma_is_kernel_res(res) &&
536 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, qp->pd->res.id))
537 return -EMSGSIZE;
538
539 ret = fill_res_name_pid(msg, res);
540 if (ret)
541 return -EMSGSIZE;
542
543 return fill_res_qp_entry_query(msg, res, dev, qp);
544 }
545
fill_res_qp_raw_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)546 static int fill_res_qp_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
547 struct rdma_restrack_entry *res, uint32_t port)
548 {
549 struct ib_qp *qp = container_of(res, struct ib_qp, res);
550 struct ib_device *dev = qp->device;
551
552 if (port && port != qp->port)
553 return -EAGAIN;
554 if (!dev->ops.fill_res_qp_entry_raw)
555 return -EINVAL;
556 return dev->ops.fill_res_qp_entry_raw(msg, qp);
557 }
558
fill_res_cm_id_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)559 static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
560 struct rdma_restrack_entry *res, uint32_t port)
561 {
562 struct rdma_id_private *id_priv =
563 container_of(res, struct rdma_id_private, res);
564 struct ib_device *dev = id_priv->id.device;
565 struct rdma_cm_id *cm_id = &id_priv->id;
566
567 if (port && port != cm_id->port_num)
568 return -EAGAIN;
569
570 if (cm_id->port_num &&
571 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num))
572 goto err;
573
574 if (id_priv->qp_num) {
575 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, id_priv->qp_num))
576 goto err;
577 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, cm_id->qp_type))
578 goto err;
579 }
580
581 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PS, cm_id->ps))
582 goto err;
583
584 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, id_priv->state))
585 goto err;
586
587 if (cm_id->route.addr.src_addr.ss_family &&
588 nla_put(msg, RDMA_NLDEV_ATTR_RES_SRC_ADDR,
589 sizeof(cm_id->route.addr.src_addr),
590 &cm_id->route.addr.src_addr))
591 goto err;
592 if (cm_id->route.addr.dst_addr.ss_family &&
593 nla_put(msg, RDMA_NLDEV_ATTR_RES_DST_ADDR,
594 sizeof(cm_id->route.addr.dst_addr),
595 &cm_id->route.addr.dst_addr))
596 goto err;
597
598 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CM_IDN, res->id))
599 goto err;
600
601 if (fill_res_name_pid(msg, res))
602 goto err;
603
604 if (dev->ops.fill_res_cm_id_entry)
605 return dev->ops.fill_res_cm_id_entry(msg, cm_id);
606 return 0;
607
608 err: return -EMSGSIZE;
609 }
610
fill_res_cq_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)611 static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
612 struct rdma_restrack_entry *res, uint32_t port)
613 {
614 struct ib_cq *cq = container_of(res, struct ib_cq, res);
615 struct ib_device *dev = cq->device;
616
617 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))
618 return -EMSGSIZE;
619 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
620 atomic_read(&cq->usecnt), RDMA_NLDEV_ATTR_PAD))
621 return -EMSGSIZE;
622
623 /* Poll context is only valid for kernel CQs */
624 if (rdma_is_kernel_res(res) &&
625 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
626 return -EMSGSIZE;
627
628 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, (cq->dim != NULL)))
629 return -EMSGSIZE;
630
631 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN, res->id))
632 return -EMSGSIZE;
633 if (!rdma_is_kernel_res(res) &&
634 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN,
635 cq->uobject->uevent.uobject.context->res.id))
636 return -EMSGSIZE;
637
638 if (fill_res_name_pid(msg, res))
639 return -EMSGSIZE;
640
641 return (dev->ops.fill_res_cq_entry) ?
642 dev->ops.fill_res_cq_entry(msg, cq) : 0;
643 }
644
fill_res_cq_raw_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)645 static int fill_res_cq_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
646 struct rdma_restrack_entry *res, uint32_t port)
647 {
648 struct ib_cq *cq = container_of(res, struct ib_cq, res);
649 struct ib_device *dev = cq->device;
650
651 if (!dev->ops.fill_res_cq_entry_raw)
652 return -EINVAL;
653 return dev->ops.fill_res_cq_entry_raw(msg, cq);
654 }
655
fill_res_mr_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)656 static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
657 struct rdma_restrack_entry *res, uint32_t port)
658 {
659 struct ib_mr *mr = container_of(res, struct ib_mr, res);
660 struct ib_device *dev = mr->pd->device;
661
662 if (has_cap_net_admin) {
663 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RKEY, mr->rkey))
664 return -EMSGSIZE;
665 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LKEY, mr->lkey))
666 return -EMSGSIZE;
667 }
668
669 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length,
670 RDMA_NLDEV_ATTR_PAD))
671 return -EMSGSIZE;
672
673 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
674 return -EMSGSIZE;
675
676 if (!rdma_is_kernel_res(res) &&
677 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, mr->pd->res.id))
678 return -EMSGSIZE;
679
680 if (fill_res_name_pid(msg, res))
681 return -EMSGSIZE;
682
683 return (dev->ops.fill_res_mr_entry) ?
684 dev->ops.fill_res_mr_entry(msg, mr) :
685 0;
686 }
687
fill_res_mr_raw_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)688 static int fill_res_mr_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
689 struct rdma_restrack_entry *res, uint32_t port)
690 {
691 struct ib_mr *mr = container_of(res, struct ib_mr, res);
692 struct ib_device *dev = mr->pd->device;
693
694 if (!dev->ops.fill_res_mr_entry_raw)
695 return -EINVAL;
696 return dev->ops.fill_res_mr_entry_raw(msg, mr);
697 }
698
fill_res_pd_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)699 static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
700 struct rdma_restrack_entry *res, uint32_t port)
701 {
702 struct ib_pd *pd = container_of(res, struct ib_pd, res);
703
704 if (has_cap_net_admin) {
705 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY,
706 pd->local_dma_lkey))
707 goto err;
708 if ((pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) &&
709 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY,
710 pd->unsafe_global_rkey))
711 goto err;
712 }
713 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
714 atomic_read(&pd->usecnt), RDMA_NLDEV_ATTR_PAD))
715 goto err;
716
717 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, res->id))
718 goto err;
719
720 if (!rdma_is_kernel_res(res) &&
721 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN,
722 pd->uobject->context->res.id))
723 goto err;
724
725 return fill_res_name_pid(msg, res);
726
727 err: return -EMSGSIZE;
728 }
729
fill_res_ctx_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)730 static int fill_res_ctx_entry(struct sk_buff *msg, bool has_cap_net_admin,
731 struct rdma_restrack_entry *res, uint32_t port)
732 {
733 struct ib_ucontext *ctx = container_of(res, struct ib_ucontext, res);
734
735 if (rdma_is_kernel_res(res))
736 return 0;
737
738 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN, ctx->res.id))
739 return -EMSGSIZE;
740
741 return fill_res_name_pid(msg, res);
742 }
743
fill_res_range_qp_entry(struct sk_buff * msg,uint32_t min_range,uint32_t max_range)744 static int fill_res_range_qp_entry(struct sk_buff *msg, uint32_t min_range,
745 uint32_t max_range)
746 {
747 struct nlattr *entry_attr;
748
749 if (!min_range)
750 return 0;
751
752 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP_ENTRY);
753 if (!entry_attr)
754 return -EMSGSIZE;
755
756 if (min_range == max_range) {
757 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, min_range))
758 goto err;
759 } else {
760 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_MIN_RANGE, min_range))
761 goto err;
762 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_MAX_RANGE, max_range))
763 goto err;
764 }
765 nla_nest_end(msg, entry_attr);
766 return 0;
767
768 err:
769 nla_nest_cancel(msg, entry_attr);
770 return -EMSGSIZE;
771 }
772
fill_res_srq_qps(struct sk_buff * msg,struct ib_srq * srq)773 static int fill_res_srq_qps(struct sk_buff *msg, struct ib_srq *srq)
774 {
775 uint32_t min_range = 0, prev = 0;
776 struct rdma_restrack_entry *res;
777 struct rdma_restrack_root *rt;
778 struct nlattr *table_attr;
779 struct ib_qp *qp = NULL;
780 unsigned long id = 0;
781
782 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP);
783 if (!table_attr)
784 return -EMSGSIZE;
785
786 rt = &srq->device->res[RDMA_RESTRACK_QP];
787 xa_lock(&rt->xa);
788 xa_for_each(&rt->xa, id, res) {
789 if (!rdma_restrack_get(res))
790 continue;
791
792 qp = container_of(res, struct ib_qp, res);
793 if (!qp->srq || (qp->srq->res.id != srq->res.id)) {
794 rdma_restrack_put(res);
795 continue;
796 }
797
798 if (qp->qp_num < prev)
799 /* qp_num should be ascending */
800 goto err_loop;
801
802 if (min_range == 0) {
803 min_range = qp->qp_num;
804 } else if (qp->qp_num > (prev + 1)) {
805 if (fill_res_range_qp_entry(msg, min_range, prev))
806 goto err_loop;
807
808 min_range = qp->qp_num;
809 }
810 prev = qp->qp_num;
811 rdma_restrack_put(res);
812 }
813
814 xa_unlock(&rt->xa);
815
816 if (fill_res_range_qp_entry(msg, min_range, prev))
817 goto err;
818
819 nla_nest_end(msg, table_attr);
820 return 0;
821
822 err_loop:
823 rdma_restrack_put(res);
824 xa_unlock(&rt->xa);
825 err:
826 nla_nest_cancel(msg, table_attr);
827 return -EMSGSIZE;
828 }
829
fill_res_srq_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)830 static int fill_res_srq_entry(struct sk_buff *msg, bool has_cap_net_admin,
831 struct rdma_restrack_entry *res, uint32_t port)
832 {
833 struct ib_srq *srq = container_of(res, struct ib_srq, res);
834 struct ib_device *dev = srq->device;
835
836 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_SRQN, srq->res.id))
837 goto err;
838
839 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, srq->srq_type))
840 goto err;
841
842 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, srq->pd->res.id))
843 goto err;
844
845 if (ib_srq_has_cq(srq->srq_type)) {
846 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN,
847 srq->ext.cq->res.id))
848 goto err;
849 }
850
851 if (fill_res_srq_qps(msg, srq))
852 goto err;
853
854 if (fill_res_name_pid(msg, res))
855 goto err;
856
857 if (dev->ops.fill_res_srq_entry)
858 return dev->ops.fill_res_srq_entry(msg, srq);
859
860 return 0;
861
862 err:
863 return -EMSGSIZE;
864 }
865
fill_res_srq_raw_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)866 static int fill_res_srq_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
867 struct rdma_restrack_entry *res, uint32_t port)
868 {
869 struct ib_srq *srq = container_of(res, struct ib_srq, res);
870 struct ib_device *dev = srq->device;
871
872 if (!dev->ops.fill_res_srq_entry_raw)
873 return -EINVAL;
874 return dev->ops.fill_res_srq_entry_raw(msg, srq);
875 }
876
fill_stat_counter_mode(struct sk_buff * msg,struct rdma_counter * counter)877 static int fill_stat_counter_mode(struct sk_buff *msg,
878 struct rdma_counter *counter)
879 {
880 struct rdma_counter_mode *m = &counter->mode;
881
882 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_MODE, m->mode))
883 return -EMSGSIZE;
884
885 if (m->mode == RDMA_COUNTER_MODE_AUTO) {
886 if ((m->mask & RDMA_COUNTER_MASK_QP_TYPE) &&
887 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, m->param.qp_type))
888 return -EMSGSIZE;
889
890 if ((m->mask & RDMA_COUNTER_MASK_PID) &&
891 fill_res_name_pid(msg, &counter->res))
892 return -EMSGSIZE;
893 }
894
895 return 0;
896 }
897
fill_stat_counter_qp_entry(struct sk_buff * msg,u32 qpn)898 static int fill_stat_counter_qp_entry(struct sk_buff *msg, u32 qpn)
899 {
900 struct nlattr *entry_attr;
901
902 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP_ENTRY);
903 if (!entry_attr)
904 return -EMSGSIZE;
905
906 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn))
907 goto err;
908
909 nla_nest_end(msg, entry_attr);
910 return 0;
911
912 err:
913 nla_nest_cancel(msg, entry_attr);
914 return -EMSGSIZE;
915 }
916
fill_stat_counter_qps(struct sk_buff * msg,struct rdma_counter * counter)917 static int fill_stat_counter_qps(struct sk_buff *msg,
918 struct rdma_counter *counter)
919 {
920 struct rdma_restrack_entry *res;
921 struct rdma_restrack_root *rt;
922 struct nlattr *table_attr;
923 struct ib_qp *qp = NULL;
924 unsigned long id = 0;
925 int ret = 0;
926
927 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP);
928 if (!table_attr)
929 return -EMSGSIZE;
930
931 rt = &counter->device->res[RDMA_RESTRACK_QP];
932 xa_lock(&rt->xa);
933 xa_for_each(&rt->xa, id, res) {
934 qp = container_of(res, struct ib_qp, res);
935 if (!qp->counter || (qp->counter->id != counter->id))
936 continue;
937
938 ret = fill_stat_counter_qp_entry(msg, qp->qp_num);
939 if (ret)
940 goto err;
941 }
942
943 xa_unlock(&rt->xa);
944 nla_nest_end(msg, table_attr);
945 return 0;
946
947 err:
948 xa_unlock(&rt->xa);
949 nla_nest_cancel(msg, table_attr);
950 return ret;
951 }
952
rdma_nl_stat_hwcounter_entry(struct sk_buff * msg,const char * name,u64 value)953 int rdma_nl_stat_hwcounter_entry(struct sk_buff *msg, const char *name,
954 u64 value)
955 {
956 struct nlattr *entry_attr;
957
958 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY);
959 if (!entry_attr)
960 return -EMSGSIZE;
961
962 if (nla_put_string(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME,
963 name))
964 goto err;
965 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE,
966 value, RDMA_NLDEV_ATTR_PAD))
967 goto err;
968
969 nla_nest_end(msg, entry_attr);
970 return 0;
971
972 err:
973 nla_nest_cancel(msg, entry_attr);
974 return -EMSGSIZE;
975 }
976 EXPORT_SYMBOL(rdma_nl_stat_hwcounter_entry);
977
fill_stat_mr_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)978 static int fill_stat_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
979 struct rdma_restrack_entry *res, uint32_t port)
980 {
981 struct ib_mr *mr = container_of(res, struct ib_mr, res);
982 struct ib_device *dev = mr->pd->device;
983
984 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
985 goto err;
986
987 if (dev->ops.fill_stat_mr_entry)
988 return dev->ops.fill_stat_mr_entry(msg, mr);
989 return 0;
990
991 err:
992 return -EMSGSIZE;
993 }
994
fill_stat_counter_hwcounters(struct sk_buff * msg,struct rdma_counter * counter)995 static int fill_stat_counter_hwcounters(struct sk_buff *msg,
996 struct rdma_counter *counter)
997 {
998 struct rdma_hw_stats *st = counter->stats;
999 struct nlattr *table_attr;
1000 int i;
1001
1002 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
1003 if (!table_attr)
1004 return -EMSGSIZE;
1005
1006 mutex_lock(&st->lock);
1007 for (i = 0; i < st->num_counters; i++) {
1008 if (test_bit(i, st->is_disabled))
1009 continue;
1010 if (rdma_nl_stat_hwcounter_entry(msg, st->descs[i].name,
1011 st->value[i]))
1012 goto err;
1013 }
1014 mutex_unlock(&st->lock);
1015
1016 nla_nest_end(msg, table_attr);
1017 return 0;
1018
1019 err:
1020 mutex_unlock(&st->lock);
1021 nla_nest_cancel(msg, table_attr);
1022 return -EMSGSIZE;
1023 }
1024
fill_res_counter_entry(struct sk_buff * msg,bool has_cap_net_admin,struct rdma_restrack_entry * res,uint32_t port)1025 static int fill_res_counter_entry(struct sk_buff *msg, bool has_cap_net_admin,
1026 struct rdma_restrack_entry *res,
1027 uint32_t port)
1028 {
1029 struct rdma_counter *counter =
1030 container_of(res, struct rdma_counter, res);
1031
1032 if (port && port != counter->port)
1033 return -EAGAIN;
1034
1035 /* Dump it even query failed */
1036 rdma_counter_query_stats(counter);
1037
1038 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, counter->port) ||
1039 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, counter->id) ||
1040 fill_stat_counter_mode(msg, counter) ||
1041 fill_stat_counter_qps(msg, counter) ||
1042 fill_stat_counter_hwcounters(msg, counter))
1043 return -EMSGSIZE;
1044
1045 return 0;
1046 }
1047
nldev_get_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1048 static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1049 struct netlink_ext_ack *extack)
1050 {
1051 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1052 struct ib_device *device;
1053 struct sk_buff *msg;
1054 u32 index;
1055 int err;
1056
1057 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1058 nldev_policy, extack);
1059 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1060 return -EINVAL;
1061
1062 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1063
1064 device = ib_device_get_by_index(sock_net(skb->sk), index);
1065 if (!device)
1066 return -EINVAL;
1067
1068 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1069 if (!msg) {
1070 err = -ENOMEM;
1071 goto err;
1072 }
1073
1074 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1075 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
1076 0, 0);
1077 if (!nlh) {
1078 err = -EMSGSIZE;
1079 goto err_free;
1080 }
1081
1082 err = fill_dev_info(msg, device);
1083 if (err)
1084 goto err_free;
1085
1086 nlmsg_end(msg, nlh);
1087
1088 ib_device_put(device);
1089 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1090
1091 err_free:
1092 nlmsg_free(msg);
1093 err:
1094 ib_device_put(device);
1095 return err;
1096 }
1097
nldev_set_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1098 static int nldev_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1099 struct netlink_ext_ack *extack)
1100 {
1101 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1102 struct ib_device *device;
1103 u32 index;
1104 int err;
1105
1106 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1107 nldev_policy, extack);
1108 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1109 return -EINVAL;
1110
1111 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1112 device = ib_device_get_by_index(sock_net(skb->sk), index);
1113 if (!device)
1114 return -EINVAL;
1115
1116 if (tb[RDMA_NLDEV_ATTR_DEV_NAME]) {
1117 char name[IB_DEVICE_NAME_MAX] = {};
1118
1119 nla_strscpy(name, tb[RDMA_NLDEV_ATTR_DEV_NAME],
1120 IB_DEVICE_NAME_MAX);
1121 if (strlen(name) == 0) {
1122 err = -EINVAL;
1123 goto done;
1124 }
1125 err = ib_device_rename(device, name);
1126 goto done;
1127 }
1128
1129 if (tb[RDMA_NLDEV_NET_NS_FD]) {
1130 u32 ns_fd;
1131
1132 ns_fd = nla_get_u32(tb[RDMA_NLDEV_NET_NS_FD]);
1133 err = ib_device_set_netns_put(skb, device, ns_fd);
1134 goto put_done;
1135 }
1136
1137 if (tb[RDMA_NLDEV_ATTR_DEV_DIM]) {
1138 u8 use_dim;
1139
1140 use_dim = nla_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
1141 err = ib_device_set_dim(device, use_dim);
1142 goto done;
1143 }
1144
1145 done:
1146 ib_device_put(device);
1147 put_done:
1148 return err;
1149 }
1150
_nldev_get_dumpit(struct ib_device * device,struct sk_buff * skb,struct netlink_callback * cb,unsigned int idx)1151 static int _nldev_get_dumpit(struct ib_device *device,
1152 struct sk_buff *skb,
1153 struct netlink_callback *cb,
1154 unsigned int idx)
1155 {
1156 int start = cb->args[0];
1157 struct nlmsghdr *nlh;
1158
1159 if (idx < start)
1160 return 0;
1161
1162 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1163 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
1164 0, NLM_F_MULTI);
1165
1166 if (!nlh || fill_dev_info(skb, device)) {
1167 nlmsg_cancel(skb, nlh);
1168 goto out;
1169 }
1170
1171 nlmsg_end(skb, nlh);
1172
1173 idx++;
1174
1175 out: cb->args[0] = idx;
1176 return skb->len;
1177 }
1178
nldev_get_dumpit(struct sk_buff * skb,struct netlink_callback * cb)1179 static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
1180 {
1181 /*
1182 * There is no need to take lock, because
1183 * we are relying on ib_core's locking.
1184 */
1185 return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);
1186 }
1187
nldev_port_get_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1188 static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1189 struct netlink_ext_ack *extack)
1190 {
1191 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1192 struct ib_device *device;
1193 struct sk_buff *msg;
1194 u32 index;
1195 u32 port;
1196 int err;
1197
1198 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1199 nldev_policy, extack);
1200 if (err ||
1201 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
1202 !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
1203 return -EINVAL;
1204
1205 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1206 device = ib_device_get_by_index(sock_net(skb->sk), index);
1207 if (!device)
1208 return -EINVAL;
1209
1210 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1211 if (!rdma_is_port_valid(device, port)) {
1212 err = -EINVAL;
1213 goto err;
1214 }
1215
1216 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1217 if (!msg) {
1218 err = -ENOMEM;
1219 goto err;
1220 }
1221
1222 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1223 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
1224 0, 0);
1225 if (!nlh) {
1226 err = -EMSGSIZE;
1227 goto err_free;
1228 }
1229
1230 err = fill_port_info(msg, device, port, sock_net(skb->sk));
1231 if (err)
1232 goto err_free;
1233
1234 nlmsg_end(msg, nlh);
1235 ib_device_put(device);
1236
1237 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1238
1239 err_free:
1240 nlmsg_free(msg);
1241 err:
1242 ib_device_put(device);
1243 return err;
1244 }
1245
nldev_port_get_dumpit(struct sk_buff * skb,struct netlink_callback * cb)1246 static int nldev_port_get_dumpit(struct sk_buff *skb,
1247 struct netlink_callback *cb)
1248 {
1249 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1250 struct ib_device *device;
1251 int start = cb->args[0];
1252 struct nlmsghdr *nlh;
1253 u32 idx = 0;
1254 u32 ifindex;
1255 int err;
1256 unsigned int p;
1257
1258 err = nlmsg_parse_deprecated(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1259 nldev_policy, NULL);
1260 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1261 return -EINVAL;
1262
1263 ifindex = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1264 device = ib_device_get_by_index(sock_net(skb->sk), ifindex);
1265 if (!device)
1266 return -EINVAL;
1267
1268 rdma_for_each_port (device, p) {
1269 /*
1270 * The dumpit function returns all information from specific
1271 * index. This specific index is taken from the netlink
1272 * messages request sent by user and it is available
1273 * in cb->args[0].
1274 *
1275 * Usually, the user doesn't fill this field and it causes
1276 * to return everything.
1277 *
1278 */
1279 if (idx < start) {
1280 idx++;
1281 continue;
1282 }
1283
1284 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
1285 cb->nlh->nlmsg_seq,
1286 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1287 RDMA_NLDEV_CMD_PORT_GET),
1288 0, NLM_F_MULTI);
1289
1290 if (!nlh || fill_port_info(skb, device, p, sock_net(skb->sk))) {
1291 nlmsg_cancel(skb, nlh);
1292 goto out;
1293 }
1294 idx++;
1295 nlmsg_end(skb, nlh);
1296 }
1297
1298 out:
1299 ib_device_put(device);
1300 cb->args[0] = idx;
1301 return skb->len;
1302 }
1303
nldev_res_get_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1304 static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1305 struct netlink_ext_ack *extack)
1306 {
1307 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1308 struct ib_device *device;
1309 struct sk_buff *msg;
1310 u32 index;
1311 int ret;
1312
1313 ret = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1314 nldev_policy, extack);
1315 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1316 return -EINVAL;
1317
1318 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1319 device = ib_device_get_by_index(sock_net(skb->sk), index);
1320 if (!device)
1321 return -EINVAL;
1322
1323 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1324 if (!msg) {
1325 ret = -ENOMEM;
1326 goto err;
1327 }
1328
1329 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1330 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
1331 0, 0);
1332 if (!nlh) {
1333 ret = -EMSGSIZE;
1334 goto err_free;
1335 }
1336
1337 ret = fill_res_info(msg, device);
1338 if (ret)
1339 goto err_free;
1340
1341 nlmsg_end(msg, nlh);
1342 ib_device_put(device);
1343 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1344
1345 err_free:
1346 nlmsg_free(msg);
1347 err:
1348 ib_device_put(device);
1349 return ret;
1350 }
1351
_nldev_res_get_dumpit(struct ib_device * device,struct sk_buff * skb,struct netlink_callback * cb,unsigned int idx)1352 static int _nldev_res_get_dumpit(struct ib_device *device,
1353 struct sk_buff *skb,
1354 struct netlink_callback *cb,
1355 unsigned int idx)
1356 {
1357 int start = cb->args[0];
1358 struct nlmsghdr *nlh;
1359
1360 if (idx < start)
1361 return 0;
1362
1363 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1364 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
1365 0, NLM_F_MULTI);
1366
1367 if (!nlh || fill_res_info(skb, device)) {
1368 nlmsg_cancel(skb, nlh);
1369 goto out;
1370 }
1371 nlmsg_end(skb, nlh);
1372
1373 idx++;
1374
1375 out:
1376 cb->args[0] = idx;
1377 return skb->len;
1378 }
1379
nldev_res_get_dumpit(struct sk_buff * skb,struct netlink_callback * cb)1380 static int nldev_res_get_dumpit(struct sk_buff *skb,
1381 struct netlink_callback *cb)
1382 {
1383 return ib_enum_all_devs(_nldev_res_get_dumpit, skb, cb);
1384 }
1385
1386 struct nldev_fill_res_entry {
1387 enum rdma_nldev_attr nldev_attr;
1388 u8 flags;
1389 u32 entry;
1390 u32 id;
1391 };
1392
1393 enum nldev_res_flags {
1394 NLDEV_PER_DEV = 1 << 0,
1395 };
1396
1397 static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
1398 [RDMA_RESTRACK_QP] = {
1399 .nldev_attr = RDMA_NLDEV_ATTR_RES_QP,
1400 .entry = RDMA_NLDEV_ATTR_RES_QP_ENTRY,
1401 .id = RDMA_NLDEV_ATTR_RES_LQPN,
1402 },
1403 [RDMA_RESTRACK_CM_ID] = {
1404 .nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
1405 .entry = RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY,
1406 .id = RDMA_NLDEV_ATTR_RES_CM_IDN,
1407 },
1408 [RDMA_RESTRACK_CQ] = {
1409 .nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
1410 .flags = NLDEV_PER_DEV,
1411 .entry = RDMA_NLDEV_ATTR_RES_CQ_ENTRY,
1412 .id = RDMA_NLDEV_ATTR_RES_CQN,
1413 },
1414 [RDMA_RESTRACK_MR] = {
1415 .nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
1416 .flags = NLDEV_PER_DEV,
1417 .entry = RDMA_NLDEV_ATTR_RES_MR_ENTRY,
1418 .id = RDMA_NLDEV_ATTR_RES_MRN,
1419 },
1420 [RDMA_RESTRACK_PD] = {
1421 .nldev_attr = RDMA_NLDEV_ATTR_RES_PD,
1422 .flags = NLDEV_PER_DEV,
1423 .entry = RDMA_NLDEV_ATTR_RES_PD_ENTRY,
1424 .id = RDMA_NLDEV_ATTR_RES_PDN,
1425 },
1426 [RDMA_RESTRACK_COUNTER] = {
1427 .nldev_attr = RDMA_NLDEV_ATTR_STAT_COUNTER,
1428 .entry = RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY,
1429 .id = RDMA_NLDEV_ATTR_STAT_COUNTER_ID,
1430 },
1431 [RDMA_RESTRACK_CTX] = {
1432 .nldev_attr = RDMA_NLDEV_ATTR_RES_CTX,
1433 .flags = NLDEV_PER_DEV,
1434 .entry = RDMA_NLDEV_ATTR_RES_CTX_ENTRY,
1435 .id = RDMA_NLDEV_ATTR_RES_CTXN,
1436 },
1437 [RDMA_RESTRACK_SRQ] = {
1438 .nldev_attr = RDMA_NLDEV_ATTR_RES_SRQ,
1439 .flags = NLDEV_PER_DEV,
1440 .entry = RDMA_NLDEV_ATTR_RES_SRQ_ENTRY,
1441 .id = RDMA_NLDEV_ATTR_RES_SRQN,
1442 },
1443
1444 };
1445
res_get_common_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack,enum rdma_restrack_type res_type,res_fill_func_t fill_func)1446 static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1447 struct netlink_ext_ack *extack,
1448 enum rdma_restrack_type res_type,
1449 res_fill_func_t fill_func)
1450 {
1451 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
1452 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1453 struct rdma_restrack_entry *res;
1454 struct ib_device *device;
1455 u32 index, id, port = 0;
1456 bool has_cap_net_admin;
1457 struct sk_buff *msg;
1458 int ret;
1459
1460 ret = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1461 nldev_policy, extack);
1462 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !fe->id || !tb[fe->id])
1463 return -EINVAL;
1464
1465 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1466 device = ib_device_get_by_index(sock_net(skb->sk), index);
1467 if (!device)
1468 return -EINVAL;
1469
1470 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1471 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1472 if (!rdma_is_port_valid(device, port)) {
1473 ret = -EINVAL;
1474 goto err;
1475 }
1476 }
1477
1478 if ((port && fe->flags & NLDEV_PER_DEV) ||
1479 (!port && ~fe->flags & NLDEV_PER_DEV)) {
1480 ret = -EINVAL;
1481 goto err;
1482 }
1483
1484 id = nla_get_u32(tb[fe->id]);
1485 res = rdma_restrack_get_byid(device, res_type, id);
1486 if (IS_ERR(res)) {
1487 ret = PTR_ERR(res);
1488 goto err;
1489 }
1490
1491 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1492 if (!msg) {
1493 ret = -ENOMEM;
1494 goto err_get;
1495 }
1496
1497 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1498 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1499 RDMA_NL_GET_OP(nlh->nlmsg_type)),
1500 0, 0);
1501
1502 if (!nlh || fill_nldev_handle(msg, device)) {
1503 ret = -EMSGSIZE;
1504 goto err_free;
1505 }
1506
1507 has_cap_net_admin = netlink_capable(skb, CAP_NET_ADMIN);
1508
1509 ret = fill_func(msg, has_cap_net_admin, res, port);
1510 if (ret)
1511 goto err_free;
1512
1513 rdma_restrack_put(res);
1514 nlmsg_end(msg, nlh);
1515 ib_device_put(device);
1516 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1517
1518 err_free:
1519 nlmsg_free(msg);
1520 err_get:
1521 rdma_restrack_put(res);
1522 err:
1523 ib_device_put(device);
1524 return ret;
1525 }
1526
res_get_common_dumpit(struct sk_buff * skb,struct netlink_callback * cb,enum rdma_restrack_type res_type,res_fill_func_t fill_func)1527 static int res_get_common_dumpit(struct sk_buff *skb,
1528 struct netlink_callback *cb,
1529 enum rdma_restrack_type res_type,
1530 res_fill_func_t fill_func)
1531 {
1532 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
1533 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1534 struct rdma_restrack_entry *res;
1535 struct rdma_restrack_root *rt;
1536 int err, ret = 0, idx = 0;
1537 struct nlattr *table_attr;
1538 struct nlattr *entry_attr;
1539 struct ib_device *device;
1540 int start = cb->args[0];
1541 bool has_cap_net_admin;
1542 struct nlmsghdr *nlh;
1543 unsigned long id;
1544 u32 index, port = 0;
1545 bool filled = false;
1546
1547 err = nlmsg_parse_deprecated(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1548 nldev_policy, NULL);
1549 /*
1550 * Right now, we are expecting the device index to get res information,
1551 * but it is possible to extend this code to return all devices in
1552 * one shot by checking the existence of RDMA_NLDEV_ATTR_DEV_INDEX.
1553 * if it doesn't exist, we will iterate over all devices.
1554 *
1555 * But it is not needed for now.
1556 */
1557 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1558 return -EINVAL;
1559
1560 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1561 device = ib_device_get_by_index(sock_net(skb->sk), index);
1562 if (!device)
1563 return -EINVAL;
1564
1565 /*
1566 * If no PORT_INDEX is supplied, we will return all QPs from that device
1567 */
1568 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1569 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1570 if (!rdma_is_port_valid(device, port)) {
1571 ret = -EINVAL;
1572 goto err_index;
1573 }
1574 }
1575
1576 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1577 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1578 RDMA_NL_GET_OP(cb->nlh->nlmsg_type)),
1579 0, NLM_F_MULTI);
1580
1581 if (!nlh || fill_nldev_handle(skb, device)) {
1582 ret = -EMSGSIZE;
1583 goto err;
1584 }
1585
1586 table_attr = nla_nest_start_noflag(skb, fe->nldev_attr);
1587 if (!table_attr) {
1588 ret = -EMSGSIZE;
1589 goto err;
1590 }
1591
1592 has_cap_net_admin = netlink_capable(cb->skb, CAP_NET_ADMIN);
1593
1594 rt = &device->res[res_type];
1595 xa_lock(&rt->xa);
1596 /*
1597 * FIXME: if the skip ahead is something common this loop should
1598 * use xas_for_each & xas_pause to optimize, we can have a lot of
1599 * objects.
1600 */
1601 xa_for_each(&rt->xa, id, res) {
1602 if (idx < start || !rdma_restrack_get(res))
1603 goto next;
1604
1605 xa_unlock(&rt->xa);
1606
1607 filled = true;
1608
1609 entry_attr = nla_nest_start_noflag(skb, fe->entry);
1610 if (!entry_attr) {
1611 ret = -EMSGSIZE;
1612 rdma_restrack_put(res);
1613 goto msg_full;
1614 }
1615
1616 ret = fill_func(skb, has_cap_net_admin, res, port);
1617
1618 rdma_restrack_put(res);
1619
1620 if (ret) {
1621 nla_nest_cancel(skb, entry_attr);
1622 if (ret == -EMSGSIZE)
1623 goto msg_full;
1624 if (ret == -EAGAIN)
1625 goto again;
1626 goto res_err;
1627 }
1628 nla_nest_end(skb, entry_attr);
1629 again: xa_lock(&rt->xa);
1630 next: idx++;
1631 }
1632 xa_unlock(&rt->xa);
1633
1634 msg_full:
1635 nla_nest_end(skb, table_attr);
1636 nlmsg_end(skb, nlh);
1637 cb->args[0] = idx;
1638
1639 /*
1640 * No more entries to fill, cancel the message and
1641 * return 0 to mark end of dumpit.
1642 */
1643 if (!filled)
1644 goto err;
1645
1646 ib_device_put(device);
1647 return skb->len;
1648
1649 res_err:
1650 nla_nest_cancel(skb, table_attr);
1651
1652 err:
1653 nlmsg_cancel(skb, nlh);
1654
1655 err_index:
1656 ib_device_put(device);
1657 return ret;
1658 }
1659
1660 #define RES_GET_FUNCS(name, type) \
1661 static int nldev_res_get_##name##_dumpit(struct sk_buff *skb, \
1662 struct netlink_callback *cb) \
1663 { \
1664 return res_get_common_dumpit(skb, cb, type, \
1665 fill_res_##name##_entry); \
1666 } \
1667 static int nldev_res_get_##name##_doit(struct sk_buff *skb, \
1668 struct nlmsghdr *nlh, \
1669 struct netlink_ext_ack *extack) \
1670 { \
1671 return res_get_common_doit(skb, nlh, extack, type, \
1672 fill_res_##name##_entry); \
1673 }
1674
1675 RES_GET_FUNCS(qp, RDMA_RESTRACK_QP);
1676 RES_GET_FUNCS(qp_raw, RDMA_RESTRACK_QP);
1677 RES_GET_FUNCS(cm_id, RDMA_RESTRACK_CM_ID);
1678 RES_GET_FUNCS(cq, RDMA_RESTRACK_CQ);
1679 RES_GET_FUNCS(cq_raw, RDMA_RESTRACK_CQ);
1680 RES_GET_FUNCS(pd, RDMA_RESTRACK_PD);
1681 RES_GET_FUNCS(mr, RDMA_RESTRACK_MR);
1682 RES_GET_FUNCS(mr_raw, RDMA_RESTRACK_MR);
1683 RES_GET_FUNCS(counter, RDMA_RESTRACK_COUNTER);
1684 RES_GET_FUNCS(ctx, RDMA_RESTRACK_CTX);
1685 RES_GET_FUNCS(srq, RDMA_RESTRACK_SRQ);
1686 RES_GET_FUNCS(srq_raw, RDMA_RESTRACK_SRQ);
1687
1688 static LIST_HEAD(link_ops);
1689 static DECLARE_RWSEM(link_ops_rwsem);
1690
link_ops_get(const char * type)1691 static const struct rdma_link_ops *link_ops_get(const char *type)
1692 {
1693 const struct rdma_link_ops *ops;
1694
1695 list_for_each_entry(ops, &link_ops, list) {
1696 if (!strcmp(ops->type, type))
1697 goto out;
1698 }
1699 ops = NULL;
1700 out:
1701 return ops;
1702 }
1703
rdma_link_register(struct rdma_link_ops * ops)1704 void rdma_link_register(struct rdma_link_ops *ops)
1705 {
1706 down_write(&link_ops_rwsem);
1707 if (WARN_ON_ONCE(link_ops_get(ops->type)))
1708 goto out;
1709 list_add(&ops->list, &link_ops);
1710 out:
1711 up_write(&link_ops_rwsem);
1712 }
1713 EXPORT_SYMBOL(rdma_link_register);
1714
rdma_link_unregister(struct rdma_link_ops * ops)1715 void rdma_link_unregister(struct rdma_link_ops *ops)
1716 {
1717 down_write(&link_ops_rwsem);
1718 list_del(&ops->list);
1719 up_write(&link_ops_rwsem);
1720 }
1721 EXPORT_SYMBOL(rdma_link_unregister);
1722
nldev_newlink(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1723 static int nldev_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
1724 struct netlink_ext_ack *extack)
1725 {
1726 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1727 char ibdev_name[IB_DEVICE_NAME_MAX];
1728 const struct rdma_link_ops *ops;
1729 char ndev_name[IFNAMSIZ];
1730 struct net_device *ndev;
1731 char type[IFNAMSIZ];
1732 int err;
1733
1734 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1735 nldev_policy, extack);
1736 if (err || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
1737 !tb[RDMA_NLDEV_ATTR_LINK_TYPE] || !tb[RDMA_NLDEV_ATTR_NDEV_NAME])
1738 return -EINVAL;
1739
1740 nla_strscpy(ibdev_name, tb[RDMA_NLDEV_ATTR_DEV_NAME],
1741 sizeof(ibdev_name));
1742 if (strchr(ibdev_name, '%') || strlen(ibdev_name) == 0)
1743 return -EINVAL;
1744
1745 nla_strscpy(type, tb[RDMA_NLDEV_ATTR_LINK_TYPE], sizeof(type));
1746 nla_strscpy(ndev_name, tb[RDMA_NLDEV_ATTR_NDEV_NAME],
1747 sizeof(ndev_name));
1748
1749 ndev = dev_get_by_name(sock_net(skb->sk), ndev_name);
1750 if (!ndev)
1751 return -ENODEV;
1752
1753 down_read(&link_ops_rwsem);
1754 ops = link_ops_get(type);
1755 #ifdef CONFIG_MODULES
1756 if (!ops) {
1757 up_read(&link_ops_rwsem);
1758 request_module("rdma-link-%s", type);
1759 down_read(&link_ops_rwsem);
1760 ops = link_ops_get(type);
1761 }
1762 #endif
1763 err = ops ? ops->newlink(ibdev_name, ndev) : -EINVAL;
1764 up_read(&link_ops_rwsem);
1765 dev_put(ndev);
1766
1767 return err;
1768 }
1769
nldev_dellink(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1770 static int nldev_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
1771 struct netlink_ext_ack *extack)
1772 {
1773 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1774 struct ib_device *device;
1775 u32 index;
1776 int err;
1777
1778 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1779 nldev_policy, extack);
1780 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1781 return -EINVAL;
1782
1783 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1784 device = ib_device_get_by_index(sock_net(skb->sk), index);
1785 if (!device)
1786 return -EINVAL;
1787
1788 if (!(device->attrs.kernel_cap_flags & IBK_ALLOW_USER_UNREG)) {
1789 ib_device_put(device);
1790 return -EINVAL;
1791 }
1792
1793 ib_unregister_device_and_put(device);
1794 return 0;
1795 }
1796
nldev_get_chardev(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1797 static int nldev_get_chardev(struct sk_buff *skb, struct nlmsghdr *nlh,
1798 struct netlink_ext_ack *extack)
1799 {
1800 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1801 char client_name[RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE];
1802 struct ib_client_nl_info data = {};
1803 struct ib_device *ibdev = NULL;
1804 struct sk_buff *msg;
1805 u32 index;
1806 int err;
1807
1808 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, nldev_policy,
1809 extack);
1810 if (err || !tb[RDMA_NLDEV_ATTR_CHARDEV_TYPE])
1811 return -EINVAL;
1812
1813 nla_strscpy(client_name, tb[RDMA_NLDEV_ATTR_CHARDEV_TYPE],
1814 sizeof(client_name));
1815
1816 if (tb[RDMA_NLDEV_ATTR_DEV_INDEX]) {
1817 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1818 ibdev = ib_device_get_by_index(sock_net(skb->sk), index);
1819 if (!ibdev)
1820 return -EINVAL;
1821
1822 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1823 data.port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1824 if (!rdma_is_port_valid(ibdev, data.port)) {
1825 err = -EINVAL;
1826 goto out_put;
1827 }
1828 } else {
1829 data.port = -1;
1830 }
1831 } else if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1832 return -EINVAL;
1833 }
1834
1835 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1836 if (!msg) {
1837 err = -ENOMEM;
1838 goto out_put;
1839 }
1840 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1841 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1842 RDMA_NLDEV_CMD_GET_CHARDEV),
1843 0, 0);
1844 if (!nlh) {
1845 err = -EMSGSIZE;
1846 goto out_nlmsg;
1847 }
1848
1849 data.nl_msg = msg;
1850 err = ib_get_client_nl_info(ibdev, client_name, &data);
1851 if (err)
1852 goto out_nlmsg;
1853
1854 err = nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CHARDEV,
1855 huge_encode_dev(data.cdev->devt),
1856 RDMA_NLDEV_ATTR_PAD);
1857 if (err)
1858 goto out_data;
1859 err = nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CHARDEV_ABI, data.abi,
1860 RDMA_NLDEV_ATTR_PAD);
1861 if (err)
1862 goto out_data;
1863 if (nla_put_string(msg, RDMA_NLDEV_ATTR_CHARDEV_NAME,
1864 dev_name(data.cdev))) {
1865 err = -EMSGSIZE;
1866 goto out_data;
1867 }
1868
1869 nlmsg_end(msg, nlh);
1870 put_device(data.cdev);
1871 if (ibdev)
1872 ib_device_put(ibdev);
1873 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1874
1875 out_data:
1876 put_device(data.cdev);
1877 out_nlmsg:
1878 nlmsg_free(msg);
1879 out_put:
1880 if (ibdev)
1881 ib_device_put(ibdev);
1882 return err;
1883 }
1884
nldev_sys_get_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1885 static int nldev_sys_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1886 struct netlink_ext_ack *extack)
1887 {
1888 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1889 struct sk_buff *msg;
1890 int err;
1891
1892 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1893 nldev_policy, extack);
1894 if (err)
1895 return err;
1896
1897 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1898 if (!msg)
1899 return -ENOMEM;
1900
1901 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1902 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1903 RDMA_NLDEV_CMD_SYS_GET),
1904 0, 0);
1905 if (!nlh) {
1906 nlmsg_free(msg);
1907 return -EMSGSIZE;
1908 }
1909
1910 err = nla_put_u8(msg, RDMA_NLDEV_SYS_ATTR_NETNS_MODE,
1911 (u8)ib_devices_shared_netns);
1912 if (err) {
1913 nlmsg_free(msg);
1914 return err;
1915 }
1916
1917 err = nla_put_u8(msg, RDMA_NLDEV_SYS_ATTR_PRIVILEGED_QKEY_MODE,
1918 (u8)privileged_qkey);
1919 if (err) {
1920 nlmsg_free(msg);
1921 return err;
1922 }
1923 /*
1924 * Copy-on-fork is supported.
1925 * See commits:
1926 * 70e806e4e645 ("mm: Do early cow for pinned pages during fork() for ptes")
1927 * 4eae4efa2c29 ("hugetlb: do early cow when page pinned on src mm")
1928 * for more details. Don't backport this without them.
1929 *
1930 * Return value ignored on purpose, assume copy-on-fork is not
1931 * supported in case of failure.
1932 */
1933 nla_put_u8(msg, RDMA_NLDEV_SYS_ATTR_COPY_ON_FORK, 1);
1934
1935 nlmsg_end(msg, nlh);
1936 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1937 }
1938
nldev_set_sys_set_netns_doit(struct nlattr * tb[])1939 static int nldev_set_sys_set_netns_doit(struct nlattr *tb[])
1940 {
1941 u8 enable;
1942 int err;
1943
1944 enable = nla_get_u8(tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]);
1945 /* Only 0 and 1 are supported */
1946 if (enable > 1)
1947 return -EINVAL;
1948
1949 err = rdma_compatdev_set(enable);
1950 return err;
1951 }
1952
nldev_set_sys_set_pqkey_doit(struct nlattr * tb[])1953 static int nldev_set_sys_set_pqkey_doit(struct nlattr *tb[])
1954 {
1955 u8 enable;
1956
1957 enable = nla_get_u8(tb[RDMA_NLDEV_SYS_ATTR_PRIVILEGED_QKEY_MODE]);
1958 /* Only 0 and 1 are supported */
1959 if (enable > 1)
1960 return -EINVAL;
1961
1962 privileged_qkey = enable;
1963 return 0;
1964 }
1965
nldev_set_sys_set_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)1966 static int nldev_set_sys_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1967 struct netlink_ext_ack *extack)
1968 {
1969 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1970 int err;
1971
1972 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1973 nldev_policy, extack);
1974 if (err)
1975 return -EINVAL;
1976
1977 if (tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE])
1978 return nldev_set_sys_set_netns_doit(tb);
1979
1980 if (tb[RDMA_NLDEV_SYS_ATTR_PRIVILEGED_QKEY_MODE])
1981 return nldev_set_sys_set_pqkey_doit(tb);
1982
1983 return -EINVAL;
1984 }
1985
1986
nldev_stat_set_mode_doit(struct sk_buff * msg,struct netlink_ext_ack * extack,struct nlattr * tb[],struct ib_device * device,u32 port)1987 static int nldev_stat_set_mode_doit(struct sk_buff *msg,
1988 struct netlink_ext_ack *extack,
1989 struct nlattr *tb[],
1990 struct ib_device *device, u32 port)
1991 {
1992 u32 mode, mask = 0, qpn, cntn = 0;
1993 int ret;
1994
1995 /* Currently only counter for QP is supported */
1996 if (!tb[RDMA_NLDEV_ATTR_STAT_RES] ||
1997 nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
1998 return -EINVAL;
1999
2000 mode = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_MODE]);
2001 if (mode == RDMA_COUNTER_MODE_AUTO) {
2002 if (tb[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK])
2003 mask = nla_get_u32(
2004 tb[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK]);
2005 return rdma_counter_set_auto_mode(device, port, mask, extack);
2006 }
2007
2008 if (!tb[RDMA_NLDEV_ATTR_RES_LQPN])
2009 return -EINVAL;
2010
2011 qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]);
2012 if (tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]) {
2013 cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]);
2014 ret = rdma_counter_bind_qpn(device, port, qpn, cntn);
2015 if (ret)
2016 return ret;
2017 } else {
2018 ret = rdma_counter_bind_qpn_alloc(device, port, qpn, &cntn);
2019 if (ret)
2020 return ret;
2021 }
2022
2023 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, cntn) ||
2024 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn)) {
2025 ret = -EMSGSIZE;
2026 goto err_fill;
2027 }
2028
2029 return 0;
2030
2031 err_fill:
2032 rdma_counter_unbind_qpn(device, port, qpn, cntn);
2033 return ret;
2034 }
2035
nldev_stat_set_counter_dynamic_doit(struct nlattr * tb[],struct ib_device * device,u32 port)2036 static int nldev_stat_set_counter_dynamic_doit(struct nlattr *tb[],
2037 struct ib_device *device,
2038 u32 port)
2039 {
2040 struct rdma_hw_stats *stats;
2041 struct nlattr *entry_attr;
2042 unsigned long *target;
2043 int rem, i, ret = 0;
2044 u32 index;
2045
2046 stats = ib_get_hw_stats_port(device, port);
2047 if (!stats)
2048 return -EINVAL;
2049
2050 target = kcalloc(BITS_TO_LONGS(stats->num_counters),
2051 sizeof(*stats->is_disabled), GFP_KERNEL);
2052 if (!target)
2053 return -ENOMEM;
2054
2055 nla_for_each_nested(entry_attr, tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS],
2056 rem) {
2057 index = nla_get_u32(entry_attr);
2058 if ((index >= stats->num_counters) ||
2059 !(stats->descs[index].flags & IB_STAT_FLAG_OPTIONAL)) {
2060 ret = -EINVAL;
2061 goto out;
2062 }
2063
2064 set_bit(index, target);
2065 }
2066
2067 for (i = 0; i < stats->num_counters; i++) {
2068 if (!(stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL))
2069 continue;
2070
2071 ret = rdma_counter_modify(device, port, i, test_bit(i, target));
2072 if (ret)
2073 goto out;
2074 }
2075
2076 out:
2077 kfree(target);
2078 return ret;
2079 }
2080
nldev_stat_set_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)2081 static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
2082 struct netlink_ext_ack *extack)
2083 {
2084 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2085 struct ib_device *device;
2086 struct sk_buff *msg;
2087 u32 index, port;
2088 int ret;
2089
2090 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, nldev_policy,
2091 extack);
2092 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
2093 !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
2094 return -EINVAL;
2095
2096 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
2097 device = ib_device_get_by_index(sock_net(skb->sk), index);
2098 if (!device)
2099 return -EINVAL;
2100
2101 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
2102 if (!rdma_is_port_valid(device, port)) {
2103 ret = -EINVAL;
2104 goto err_put_device;
2105 }
2106
2107 if (!tb[RDMA_NLDEV_ATTR_STAT_MODE] &&
2108 !tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS]) {
2109 ret = -EINVAL;
2110 goto err_put_device;
2111 }
2112
2113 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2114 if (!msg) {
2115 ret = -ENOMEM;
2116 goto err_put_device;
2117 }
2118 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
2119 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
2120 RDMA_NLDEV_CMD_STAT_SET),
2121 0, 0);
2122 if (!nlh || fill_nldev_handle(msg, device) ||
2123 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) {
2124 ret = -EMSGSIZE;
2125 goto err_free_msg;
2126 }
2127
2128 if (tb[RDMA_NLDEV_ATTR_STAT_MODE]) {
2129 ret = nldev_stat_set_mode_doit(msg, extack, tb, device, port);
2130 if (ret)
2131 goto err_free_msg;
2132 }
2133
2134 if (tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTERS]) {
2135 ret = nldev_stat_set_counter_dynamic_doit(tb, device, port);
2136 if (ret)
2137 goto err_free_msg;
2138 }
2139
2140 nlmsg_end(msg, nlh);
2141 ib_device_put(device);
2142 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2143
2144 err_free_msg:
2145 nlmsg_free(msg);
2146 err_put_device:
2147 ib_device_put(device);
2148 return ret;
2149 }
2150
nldev_stat_del_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)2151 static int nldev_stat_del_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
2152 struct netlink_ext_ack *extack)
2153 {
2154 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2155 struct ib_device *device;
2156 struct sk_buff *msg;
2157 u32 index, port, qpn, cntn;
2158 int ret;
2159
2160 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2161 nldev_policy, extack);
2162 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES] ||
2163 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX] ||
2164 !tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID] ||
2165 !tb[RDMA_NLDEV_ATTR_RES_LQPN])
2166 return -EINVAL;
2167
2168 if (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
2169 return -EINVAL;
2170
2171 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
2172 device = ib_device_get_by_index(sock_net(skb->sk), index);
2173 if (!device)
2174 return -EINVAL;
2175
2176 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
2177 if (!rdma_is_port_valid(device, port)) {
2178 ret = -EINVAL;
2179 goto err;
2180 }
2181
2182 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2183 if (!msg) {
2184 ret = -ENOMEM;
2185 goto err;
2186 }
2187 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
2188 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
2189 RDMA_NLDEV_CMD_STAT_SET),
2190 0, 0);
2191 if (!nlh) {
2192 ret = -EMSGSIZE;
2193 goto err_fill;
2194 }
2195
2196 cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]);
2197 qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]);
2198 if (fill_nldev_handle(msg, device) ||
2199 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
2200 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, cntn) ||
2201 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn)) {
2202 ret = -EMSGSIZE;
2203 goto err_fill;
2204 }
2205
2206 ret = rdma_counter_unbind_qpn(device, port, qpn, cntn);
2207 if (ret)
2208 goto err_fill;
2209
2210 nlmsg_end(msg, nlh);
2211 ib_device_put(device);
2212 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2213
2214 err_fill:
2215 nlmsg_free(msg);
2216 err:
2217 ib_device_put(device);
2218 return ret;
2219 }
2220
stat_get_doit_default_counter(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack,struct nlattr * tb[])2221 static int stat_get_doit_default_counter(struct sk_buff *skb,
2222 struct nlmsghdr *nlh,
2223 struct netlink_ext_ack *extack,
2224 struct nlattr *tb[])
2225 {
2226 struct rdma_hw_stats *stats;
2227 struct nlattr *table_attr;
2228 struct ib_device *device;
2229 int ret, num_cnts, i;
2230 struct sk_buff *msg;
2231 u32 index, port;
2232 u64 v;
2233
2234 if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
2235 return -EINVAL;
2236
2237 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
2238 device = ib_device_get_by_index(sock_net(skb->sk), index);
2239 if (!device)
2240 return -EINVAL;
2241
2242 if (!device->ops.alloc_hw_port_stats || !device->ops.get_hw_stats) {
2243 ret = -EINVAL;
2244 goto err;
2245 }
2246
2247 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
2248 stats = ib_get_hw_stats_port(device, port);
2249 if (!stats) {
2250 ret = -EINVAL;
2251 goto err;
2252 }
2253
2254 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2255 if (!msg) {
2256 ret = -ENOMEM;
2257 goto err;
2258 }
2259
2260 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
2261 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
2262 RDMA_NLDEV_CMD_STAT_GET),
2263 0, 0);
2264
2265 if (!nlh || fill_nldev_handle(msg, device) ||
2266 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) {
2267 ret = -EMSGSIZE;
2268 goto err_msg;
2269 }
2270
2271 mutex_lock(&stats->lock);
2272
2273 num_cnts = device->ops.get_hw_stats(device, stats, port, 0);
2274 if (num_cnts < 0) {
2275 ret = -EINVAL;
2276 goto err_stats;
2277 }
2278
2279 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
2280 if (!table_attr) {
2281 ret = -EMSGSIZE;
2282 goto err_stats;
2283 }
2284 for (i = 0; i < num_cnts; i++) {
2285 if (test_bit(i, stats->is_disabled))
2286 continue;
2287
2288 v = stats->value[i] +
2289 rdma_counter_get_hwstat_value(device, port, i);
2290 if (rdma_nl_stat_hwcounter_entry(msg,
2291 stats->descs[i].name, v)) {
2292 ret = -EMSGSIZE;
2293 goto err_table;
2294 }
2295 }
2296 nla_nest_end(msg, table_attr);
2297
2298 mutex_unlock(&stats->lock);
2299 nlmsg_end(msg, nlh);
2300 ib_device_put(device);
2301 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2302
2303 err_table:
2304 nla_nest_cancel(msg, table_attr);
2305 err_stats:
2306 mutex_unlock(&stats->lock);
2307 err_msg:
2308 nlmsg_free(msg);
2309 err:
2310 ib_device_put(device);
2311 return ret;
2312 }
2313
stat_get_doit_qp(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack,struct nlattr * tb[])2314 static int stat_get_doit_qp(struct sk_buff *skb, struct nlmsghdr *nlh,
2315 struct netlink_ext_ack *extack, struct nlattr *tb[])
2316
2317 {
2318 static enum rdma_nl_counter_mode mode;
2319 static enum rdma_nl_counter_mask mask;
2320 struct ib_device *device;
2321 struct sk_buff *msg;
2322 u32 index, port;
2323 int ret;
2324
2325 if (tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID])
2326 return nldev_res_get_counter_doit(skb, nlh, extack);
2327
2328 if (!tb[RDMA_NLDEV_ATTR_STAT_MODE] ||
2329 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
2330 return -EINVAL;
2331
2332 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
2333 device = ib_device_get_by_index(sock_net(skb->sk), index);
2334 if (!device)
2335 return -EINVAL;
2336
2337 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
2338 if (!rdma_is_port_valid(device, port)) {
2339 ret = -EINVAL;
2340 goto err;
2341 }
2342
2343 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2344 if (!msg) {
2345 ret = -ENOMEM;
2346 goto err;
2347 }
2348
2349 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
2350 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
2351 RDMA_NLDEV_CMD_STAT_GET),
2352 0, 0);
2353 if (!nlh) {
2354 ret = -EMSGSIZE;
2355 goto err_msg;
2356 }
2357
2358 ret = rdma_counter_get_mode(device, port, &mode, &mask);
2359 if (ret)
2360 goto err_msg;
2361
2362 if (fill_nldev_handle(msg, device) ||
2363 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
2364 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_MODE, mode)) {
2365 ret = -EMSGSIZE;
2366 goto err_msg;
2367 }
2368
2369 if ((mode == RDMA_COUNTER_MODE_AUTO) &&
2370 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK, mask)) {
2371 ret = -EMSGSIZE;
2372 goto err_msg;
2373 }
2374
2375 nlmsg_end(msg, nlh);
2376 ib_device_put(device);
2377 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2378
2379 err_msg:
2380 nlmsg_free(msg);
2381 err:
2382 ib_device_put(device);
2383 return ret;
2384 }
2385
nldev_stat_get_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)2386 static int nldev_stat_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
2387 struct netlink_ext_ack *extack)
2388 {
2389 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2390 int ret;
2391
2392 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2393 nldev_policy, extack);
2394 if (ret)
2395 return -EINVAL;
2396
2397 if (!tb[RDMA_NLDEV_ATTR_STAT_RES])
2398 return stat_get_doit_default_counter(skb, nlh, extack, tb);
2399
2400 switch (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES])) {
2401 case RDMA_NLDEV_ATTR_RES_QP:
2402 ret = stat_get_doit_qp(skb, nlh, extack, tb);
2403 break;
2404 case RDMA_NLDEV_ATTR_RES_MR:
2405 ret = res_get_common_doit(skb, nlh, extack, RDMA_RESTRACK_MR,
2406 fill_stat_mr_entry);
2407 break;
2408 default:
2409 ret = -EINVAL;
2410 break;
2411 }
2412
2413 return ret;
2414 }
2415
nldev_stat_get_dumpit(struct sk_buff * skb,struct netlink_callback * cb)2416 static int nldev_stat_get_dumpit(struct sk_buff *skb,
2417 struct netlink_callback *cb)
2418 {
2419 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2420 int ret;
2421
2422 ret = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2423 nldev_policy, NULL);
2424 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES])
2425 return -EINVAL;
2426
2427 switch (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES])) {
2428 case RDMA_NLDEV_ATTR_RES_QP:
2429 ret = nldev_res_get_counter_dumpit(skb, cb);
2430 break;
2431 case RDMA_NLDEV_ATTR_RES_MR:
2432 ret = res_get_common_dumpit(skb, cb, RDMA_RESTRACK_MR,
2433 fill_stat_mr_entry);
2434 break;
2435 default:
2436 ret = -EINVAL;
2437 break;
2438 }
2439
2440 return ret;
2441 }
2442
nldev_stat_get_counter_status_doit(struct sk_buff * skb,struct nlmsghdr * nlh,struct netlink_ext_ack * extack)2443 static int nldev_stat_get_counter_status_doit(struct sk_buff *skb,
2444 struct nlmsghdr *nlh,
2445 struct netlink_ext_ack *extack)
2446 {
2447 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX], *table, *entry;
2448 struct rdma_hw_stats *stats;
2449 struct ib_device *device;
2450 struct sk_buff *msg;
2451 u32 devid, port;
2452 int ret, i;
2453
2454 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2455 nldev_policy, extack);
2456 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
2457 !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
2458 return -EINVAL;
2459
2460 devid = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
2461 device = ib_device_get_by_index(sock_net(skb->sk), devid);
2462 if (!device)
2463 return -EINVAL;
2464
2465 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
2466 if (!rdma_is_port_valid(device, port)) {
2467 ret = -EINVAL;
2468 goto err;
2469 }
2470
2471 stats = ib_get_hw_stats_port(device, port);
2472 if (!stats) {
2473 ret = -EINVAL;
2474 goto err;
2475 }
2476
2477 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2478 if (!msg) {
2479 ret = -ENOMEM;
2480 goto err;
2481 }
2482
2483 nlh = nlmsg_put(
2484 msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
2485 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_STAT_GET_STATUS),
2486 0, 0);
2487
2488 ret = -EMSGSIZE;
2489 if (!nlh || fill_nldev_handle(msg, device) ||
2490 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
2491 goto err_msg;
2492
2493 table = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
2494 if (!table)
2495 goto err_msg;
2496
2497 mutex_lock(&stats->lock);
2498 for (i = 0; i < stats->num_counters; i++) {
2499 entry = nla_nest_start(msg,
2500 RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY);
2501 if (!entry)
2502 goto err_msg_table;
2503
2504 if (nla_put_string(msg,
2505 RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME,
2506 stats->descs[i].name) ||
2507 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_INDEX, i))
2508 goto err_msg_entry;
2509
2510 if ((stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) &&
2511 (nla_put_u8(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC,
2512 !test_bit(i, stats->is_disabled))))
2513 goto err_msg_entry;
2514
2515 nla_nest_end(msg, entry);
2516 }
2517 mutex_unlock(&stats->lock);
2518
2519 nla_nest_end(msg, table);
2520 nlmsg_end(msg, nlh);
2521 ib_device_put(device);
2522 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2523
2524 err_msg_entry:
2525 nla_nest_cancel(msg, entry);
2526 err_msg_table:
2527 mutex_unlock(&stats->lock);
2528 nla_nest_cancel(msg, table);
2529 err_msg:
2530 nlmsg_free(msg);
2531 err:
2532 ib_device_put(device);
2533 return ret;
2534 }
2535
2536 static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
2537 [RDMA_NLDEV_CMD_GET] = {
2538 .doit = nldev_get_doit,
2539 .dump = nldev_get_dumpit,
2540 },
2541 [RDMA_NLDEV_CMD_GET_CHARDEV] = {
2542 .doit = nldev_get_chardev,
2543 },
2544 [RDMA_NLDEV_CMD_SET] = {
2545 .doit = nldev_set_doit,
2546 .flags = RDMA_NL_ADMIN_PERM,
2547 },
2548 [RDMA_NLDEV_CMD_NEWLINK] = {
2549 .doit = nldev_newlink,
2550 .flags = RDMA_NL_ADMIN_PERM,
2551 },
2552 [RDMA_NLDEV_CMD_DELLINK] = {
2553 .doit = nldev_dellink,
2554 .flags = RDMA_NL_ADMIN_PERM,
2555 },
2556 [RDMA_NLDEV_CMD_PORT_GET] = {
2557 .doit = nldev_port_get_doit,
2558 .dump = nldev_port_get_dumpit,
2559 },
2560 [RDMA_NLDEV_CMD_RES_GET] = {
2561 .doit = nldev_res_get_doit,
2562 .dump = nldev_res_get_dumpit,
2563 },
2564 [RDMA_NLDEV_CMD_RES_QP_GET] = {
2565 .doit = nldev_res_get_qp_doit,
2566 .dump = nldev_res_get_qp_dumpit,
2567 },
2568 [RDMA_NLDEV_CMD_RES_CM_ID_GET] = {
2569 .doit = nldev_res_get_cm_id_doit,
2570 .dump = nldev_res_get_cm_id_dumpit,
2571 },
2572 [RDMA_NLDEV_CMD_RES_CQ_GET] = {
2573 .doit = nldev_res_get_cq_doit,
2574 .dump = nldev_res_get_cq_dumpit,
2575 },
2576 [RDMA_NLDEV_CMD_RES_MR_GET] = {
2577 .doit = nldev_res_get_mr_doit,
2578 .dump = nldev_res_get_mr_dumpit,
2579 },
2580 [RDMA_NLDEV_CMD_RES_PD_GET] = {
2581 .doit = nldev_res_get_pd_doit,
2582 .dump = nldev_res_get_pd_dumpit,
2583 },
2584 [RDMA_NLDEV_CMD_RES_CTX_GET] = {
2585 .doit = nldev_res_get_ctx_doit,
2586 .dump = nldev_res_get_ctx_dumpit,
2587 },
2588 [RDMA_NLDEV_CMD_RES_SRQ_GET] = {
2589 .doit = nldev_res_get_srq_doit,
2590 .dump = nldev_res_get_srq_dumpit,
2591 },
2592 [RDMA_NLDEV_CMD_SYS_GET] = {
2593 .doit = nldev_sys_get_doit,
2594 },
2595 [RDMA_NLDEV_CMD_SYS_SET] = {
2596 .doit = nldev_set_sys_set_doit,
2597 .flags = RDMA_NL_ADMIN_PERM,
2598 },
2599 [RDMA_NLDEV_CMD_STAT_SET] = {
2600 .doit = nldev_stat_set_doit,
2601 .flags = RDMA_NL_ADMIN_PERM,
2602 },
2603 [RDMA_NLDEV_CMD_STAT_GET] = {
2604 .doit = nldev_stat_get_doit,
2605 .dump = nldev_stat_get_dumpit,
2606 },
2607 [RDMA_NLDEV_CMD_STAT_DEL] = {
2608 .doit = nldev_stat_del_doit,
2609 .flags = RDMA_NL_ADMIN_PERM,
2610 },
2611 [RDMA_NLDEV_CMD_RES_QP_GET_RAW] = {
2612 .doit = nldev_res_get_qp_raw_doit,
2613 .dump = nldev_res_get_qp_raw_dumpit,
2614 .flags = RDMA_NL_ADMIN_PERM,
2615 },
2616 [RDMA_NLDEV_CMD_RES_CQ_GET_RAW] = {
2617 .doit = nldev_res_get_cq_raw_doit,
2618 .dump = nldev_res_get_cq_raw_dumpit,
2619 .flags = RDMA_NL_ADMIN_PERM,
2620 },
2621 [RDMA_NLDEV_CMD_RES_MR_GET_RAW] = {
2622 .doit = nldev_res_get_mr_raw_doit,
2623 .dump = nldev_res_get_mr_raw_dumpit,
2624 .flags = RDMA_NL_ADMIN_PERM,
2625 },
2626 [RDMA_NLDEV_CMD_RES_SRQ_GET_RAW] = {
2627 .doit = nldev_res_get_srq_raw_doit,
2628 .dump = nldev_res_get_srq_raw_dumpit,
2629 .flags = RDMA_NL_ADMIN_PERM,
2630 },
2631 [RDMA_NLDEV_CMD_STAT_GET_STATUS] = {
2632 .doit = nldev_stat_get_counter_status_doit,
2633 },
2634 };
2635
nldev_init(void)2636 void __init nldev_init(void)
2637 {
2638 rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
2639 }
2640
nldev_exit(void)2641 void nldev_exit(void)
2642 {
2643 rdma_nl_unregister(RDMA_NL_NLDEV);
2644 }
2645
2646 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);
2647