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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / infiniband / core / nldev.c
blob08366e254b1d1851912ccbf709fba55b3f98ce53
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 typedef int (*res_fill_func_t)(struct sk_buff*, bool,
47 struct rdma_restrack_entry*, uint32_t);
48
49 /*
50 * Sort array elements by the netlink attribute name
51 */
52 static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
53 [RDMA_NLDEV_ATTR_CHARDEV] = { .type = NLA_U64 },
54 [RDMA_NLDEV_ATTR_CHARDEV_ABI] = { .type = NLA_U64 },
55 [RDMA_NLDEV_ATTR_CHARDEV_NAME] = { .type = NLA_NUL_STRING,
56 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
57 [RDMA_NLDEV_ATTR_CHARDEV_TYPE] = { .type = NLA_NUL_STRING,
58 .len = RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE },
59 [RDMA_NLDEV_ATTR_DEV_DIM] = { .type = NLA_U8 },
60 [RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
61 [RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
62 .len = IB_DEVICE_NAME_MAX },
63 [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = { .type = NLA_U8 },
64 [RDMA_NLDEV_ATTR_DEV_PROTOCOL] = { .type = NLA_NUL_STRING,
65 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
66 [RDMA_NLDEV_ATTR_DRIVER] = { .type = NLA_NESTED },
67 [RDMA_NLDEV_ATTR_DRIVER_ENTRY] = { .type = NLA_NESTED },
68 [RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE] = { .type = NLA_U8 },
69 [RDMA_NLDEV_ATTR_DRIVER_STRING] = { .type = NLA_NUL_STRING,
70 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
71 [RDMA_NLDEV_ATTR_DRIVER_S32] = { .type = NLA_S32 },
72 [RDMA_NLDEV_ATTR_DRIVER_S64] = { .type = NLA_S64 },
73 [RDMA_NLDEV_ATTR_DRIVER_U32] = { .type = NLA_U32 },
74 [RDMA_NLDEV_ATTR_DRIVER_U64] = { .type = NLA_U64 },
75 [RDMA_NLDEV_ATTR_FW_VERSION] = { .type = NLA_NUL_STRING,
76 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
77 [RDMA_NLDEV_ATTR_LID] = { .type = NLA_U32 },
78 [RDMA_NLDEV_ATTR_LINK_TYPE] = { .type = NLA_NUL_STRING,
79 .len = IFNAMSIZ },
80 [RDMA_NLDEV_ATTR_LMC] = { .type = NLA_U8 },
81 [RDMA_NLDEV_ATTR_NDEV_INDEX] = { .type = NLA_U32 },
82 [RDMA_NLDEV_ATTR_NDEV_NAME] = { .type = NLA_NUL_STRING,
83 .len = IFNAMSIZ },
84 [RDMA_NLDEV_ATTR_NODE_GUID] = { .type = NLA_U64 },
85 [RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 },
86 [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = { .type = NLA_U8 },
87 [RDMA_NLDEV_ATTR_PORT_STATE] = { .type = NLA_U8 },
88 [RDMA_NLDEV_ATTR_RES_CM_ID] = { .type = NLA_NESTED },
89 [RDMA_NLDEV_ATTR_RES_CM_IDN] = { .type = NLA_U32 },
90 [RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY] = { .type = NLA_NESTED },
91 [RDMA_NLDEV_ATTR_RES_CQ] = { .type = NLA_NESTED },
92 [RDMA_NLDEV_ATTR_RES_CQE] = { .type = NLA_U32 },
93 [RDMA_NLDEV_ATTR_RES_CQN] = { .type = NLA_U32 },
94 [RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = { .type = NLA_NESTED },
95 [RDMA_NLDEV_ATTR_RES_CTXN] = { .type = NLA_U32 },
96 [RDMA_NLDEV_ATTR_RES_DST_ADDR] = {
97 .len = sizeof(struct __kernel_sockaddr_storage) },
98 [RDMA_NLDEV_ATTR_RES_IOVA] = { .type = NLA_U64 },
99 [RDMA_NLDEV_ATTR_RES_KERN_NAME] = { .type = NLA_NUL_STRING,
100 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
101 [RDMA_NLDEV_ATTR_RES_LKEY] = { .type = NLA_U32 },
102 [RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY] = { .type = NLA_U32 },
103 [RDMA_NLDEV_ATTR_RES_LQPN] = { .type = NLA_U32 },
104 [RDMA_NLDEV_ATTR_RES_MR] = { .type = NLA_NESTED },
105 [RDMA_NLDEV_ATTR_RES_MRLEN] = { .type = NLA_U64 },
106 [RDMA_NLDEV_ATTR_RES_MRN] = { .type = NLA_U32 },
107 [RDMA_NLDEV_ATTR_RES_MR_ENTRY] = { .type = NLA_NESTED },
108 [RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE] = { .type = NLA_U8 },
109 [RDMA_NLDEV_ATTR_RES_PD] = { .type = NLA_NESTED },
110 [RDMA_NLDEV_ATTR_RES_PDN] = { .type = NLA_U32 },
111 [RDMA_NLDEV_ATTR_RES_PD_ENTRY] = { .type = NLA_NESTED },
112 [RDMA_NLDEV_ATTR_RES_PID] = { .type = NLA_U32 },
113 [RDMA_NLDEV_ATTR_RES_POLL_CTX] = { .type = NLA_U8 },
114 [RDMA_NLDEV_ATTR_RES_PS] = { .type = NLA_U32 },
115 [RDMA_NLDEV_ATTR_RES_QP] = { .type = NLA_NESTED },
116 [RDMA_NLDEV_ATTR_RES_QP_ENTRY] = { .type = NLA_NESTED },
117 [RDMA_NLDEV_ATTR_RES_RAW] = { .type = NLA_BINARY },
118 [RDMA_NLDEV_ATTR_RES_RKEY] = { .type = NLA_U32 },
119 [RDMA_NLDEV_ATTR_RES_RQPN] = { .type = NLA_U32 },
120 [RDMA_NLDEV_ATTR_RES_RQ_PSN] = { .type = NLA_U32 },
121 [RDMA_NLDEV_ATTR_RES_SQ_PSN] = { .type = NLA_U32 },
122 [RDMA_NLDEV_ATTR_RES_SRC_ADDR] = {
123 .len = sizeof(struct __kernel_sockaddr_storage) },
124 [RDMA_NLDEV_ATTR_RES_STATE] = { .type = NLA_U8 },
125 [RDMA_NLDEV_ATTR_RES_SUMMARY] = { .type = NLA_NESTED },
126 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY] = { .type = NLA_NESTED },
127 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR]= { .type = NLA_U64 },
128 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME]= { .type = NLA_NUL_STRING,
129 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
130 [RDMA_NLDEV_ATTR_RES_TYPE] = { .type = NLA_U8 },
131 [RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]= { .type = NLA_U32 },
132 [RDMA_NLDEV_ATTR_RES_USECNT] = { .type = NLA_U64 },
133 [RDMA_NLDEV_ATTR_SM_LID] = { .type = NLA_U32 },
134 [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 },
135 [RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK] = { .type = NLA_U32 },
136 [RDMA_NLDEV_ATTR_STAT_MODE] = { .type = NLA_U32 },
137 [RDMA_NLDEV_ATTR_STAT_RES] = { .type = NLA_U32 },
138 [RDMA_NLDEV_ATTR_STAT_COUNTER] = { .type = NLA_NESTED },
139 [RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY] = { .type = NLA_NESTED },
140 [RDMA_NLDEV_ATTR_STAT_COUNTER_ID] = { .type = NLA_U32 },
141 [RDMA_NLDEV_ATTR_STAT_HWCOUNTERS] = { .type = NLA_NESTED },
142 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY] = { .type = NLA_NESTED },
143 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME] = { .type = NLA_NUL_STRING },
144 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE] = { .type = NLA_U64 },
145 [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 },
146 [RDMA_NLDEV_ATTR_UVERBS_DRIVER_ID] = { .type = NLA_U32 },
147 [RDMA_NLDEV_NET_NS_FD] = { .type = NLA_U32 },
148 [RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = { .type = NLA_U8 },
149 };
150
151 static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
152 enum rdma_nldev_print_type print_type)
153 {
154 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DRIVER_STRING, name))
155 return -EMSGSIZE;
156 if (print_type != RDMA_NLDEV_PRINT_TYPE_UNSPEC &&
157 nla_put_u8(msg, RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE, print_type))
158 return -EMSGSIZE;
159
160 return 0;
161 }
162
163 static int _rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name,
164 enum rdma_nldev_print_type print_type,
165 u32 value)
166 {
167 if (put_driver_name_print_type(msg, name, print_type))
168 return -EMSGSIZE;
169 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DRIVER_U32, value))
170 return -EMSGSIZE;
171
172 return 0;
173 }
174
175 static int _rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name,
176 enum rdma_nldev_print_type print_type,
177 u64 value)
178 {
179 if (put_driver_name_print_type(msg, name, print_type))
180 return -EMSGSIZE;
181 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_DRIVER_U64, value,
182 RDMA_NLDEV_ATTR_PAD))
183 return -EMSGSIZE;
184
185 return 0;
186 }
187
188 int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name,
189 const char *str)
190 {
191 if (put_driver_name_print_type(msg, name,
192 RDMA_NLDEV_PRINT_TYPE_UNSPEC))
193 return -EMSGSIZE;
194 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DRIVER_STRING, str))
195 return -EMSGSIZE;
196
197 return 0;
198 }
199 EXPORT_SYMBOL(rdma_nl_put_driver_string);
200
201 int rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name, u32 value)
202 {
203 return _rdma_nl_put_driver_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_UNSPEC,
204 value);
205 }
206 EXPORT_SYMBOL(rdma_nl_put_driver_u32);
207
208 int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name,
209 u32 value)
210 {
211 return _rdma_nl_put_driver_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
212 value);
213 }
214 EXPORT_SYMBOL(rdma_nl_put_driver_u32_hex);
215
216 int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value)
217 {
218 return _rdma_nl_put_driver_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_UNSPEC,
219 value);
220 }
221 EXPORT_SYMBOL(rdma_nl_put_driver_u64);
222
223 int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name, u64 value)
224 {
225 return _rdma_nl_put_driver_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
226 value);
227 }
228 EXPORT_SYMBOL(rdma_nl_put_driver_u64_hex);
229
230 static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
231 {
232 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
233 return -EMSGSIZE;
234 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME,
235 dev_name(&device->dev)))
236 return -EMSGSIZE;
237
238 return 0;
239 }
240
241 static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
242 {
243 char fw[IB_FW_VERSION_NAME_MAX];
244 int ret = 0;
245 u8 port;
246
247 if (fill_nldev_handle(msg, device))
248 return -EMSGSIZE;
249
250 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
251 return -EMSGSIZE;
252
253 BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64));
254 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
255 device->attrs.device_cap_flags,
256 RDMA_NLDEV_ATTR_PAD))
257 return -EMSGSIZE;
258
259 ib_get_device_fw_str(device, fw);
260 /* Device without FW has strlen(fw) = 0 */
261 if (strlen(fw) && nla_put_string(msg, RDMA_NLDEV_ATTR_FW_VERSION, fw))
262 return -EMSGSIZE;
263
264 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID,
265 be64_to_cpu(device->node_guid),
266 RDMA_NLDEV_ATTR_PAD))
267 return -EMSGSIZE;
268 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID,
269 be64_to_cpu(device->attrs.sys_image_guid),
270 RDMA_NLDEV_ATTR_PAD))
271 return -EMSGSIZE;
272 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
273 return -EMSGSIZE;
274 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, device->use_cq_dim))
275 return -EMSGSIZE;
276
277 /*
278 * Link type is determined on first port and mlx4 device
279 * which can potentially have two different link type for the same
280 * IB device is considered as better to be avoided in the future,
281 */
282 port = rdma_start_port(device);
283 if (rdma_cap_opa_mad(device, port))
284 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "opa");
285 else if (rdma_protocol_ib(device, port))
286 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "ib");
287 else if (rdma_protocol_iwarp(device, port))
288 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "iw");
289 else if (rdma_protocol_roce(device, port))
290 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "roce");
291 else if (rdma_protocol_usnic(device, port))
292 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL,
293 "usnic");
294 return ret;
295 }
296
297 static int fill_port_info(struct sk_buff *msg,
298 struct ib_device *device, u32 port,
299 const struct net *net)
300 {
301 struct net_device *netdev = NULL;
302 struct ib_port_attr attr;
303 int ret;
304 u64 cap_flags = 0;
305
306 if (fill_nldev_handle(msg, device))
307 return -EMSGSIZE;
308
309 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
310 return -EMSGSIZE;
311
312 ret = ib_query_port(device, port, &attr);
313 if (ret)
314 return ret;
315
316 if (rdma_protocol_ib(device, port)) {
317 BUILD_BUG_ON((sizeof(attr.port_cap_flags) +
318 sizeof(attr.port_cap_flags2)) > sizeof(u64));
319 cap_flags = attr.port_cap_flags |
320 ((u64)attr.port_cap_flags2 << 32);
321 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
322 cap_flags, RDMA_NLDEV_ATTR_PAD))
323 return -EMSGSIZE;
324 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX,
325 attr.subnet_prefix, RDMA_NLDEV_ATTR_PAD))
326 return -EMSGSIZE;
327 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid))
328 return -EMSGSIZE;
329 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_SM_LID, attr.sm_lid))
330 return -EMSGSIZE;
331 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_LMC, attr.lmc))
332 return -EMSGSIZE;
333 }
334 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_STATE, attr.state))
335 return -EMSGSIZE;
336 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_PHYS_STATE, attr.phys_state))
337 return -EMSGSIZE;
338
339 netdev = ib_device_get_netdev(device, port);
340 if (netdev && net_eq(dev_net(netdev), net)) {
341 ret = nla_put_u32(msg,
342 RDMA_NLDEV_ATTR_NDEV_INDEX, netdev->ifindex);
343 if (ret)
344 goto out;
345 ret = nla_put_string(msg,
346 RDMA_NLDEV_ATTR_NDEV_NAME, netdev->name);
347 }
348
349 out:
350 if (netdev)
351 dev_put(netdev);
352 return ret;
353 }
354
355 static int fill_res_info_entry(struct sk_buff *msg,
356 const char *name, u64 curr)
357 {
358 struct nlattr *entry_attr;
359
360 entry_attr = nla_nest_start_noflag(msg,
361 RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY);
362 if (!entry_attr)
363 return -EMSGSIZE;
364
365 if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME, name))
366 goto err;
367 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr,
368 RDMA_NLDEV_ATTR_PAD))
369 goto err;
370
371 nla_nest_end(msg, entry_attr);
372 return 0;
373
374 err:
375 nla_nest_cancel(msg, entry_attr);
376 return -EMSGSIZE;
377 }
378
379 static int fill_res_info(struct sk_buff *msg, struct ib_device *device)
380 {
381 static const char * const names[RDMA_RESTRACK_MAX] = {
382 [RDMA_RESTRACK_PD] = "pd",
383 [RDMA_RESTRACK_CQ] = "cq",
384 [RDMA_RESTRACK_QP] = "qp",
385 [RDMA_RESTRACK_CM_ID] = "cm_id",
386 [RDMA_RESTRACK_MR] = "mr",
387 [RDMA_RESTRACK_CTX] = "ctx",
388 };
389
390 struct nlattr *table_attr;
391 int ret, i, curr;
392
393 if (fill_nldev_handle(msg, device))
394 return -EMSGSIZE;
395
396 table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_RES_SUMMARY);
397 if (!table_attr)
398 return -EMSGSIZE;
399
400 for (i = 0; i < RDMA_RESTRACK_MAX; i++) {
401 if (!names[i])
402 continue;
403 curr = rdma_restrack_count(device, i);
404 ret = fill_res_info_entry(msg, names[i], curr);
405 if (ret)
406 goto err;
407 }
408
409 nla_nest_end(msg, table_attr);
410 return 0;
411
412 err:
413 nla_nest_cancel(msg, table_attr);
414 return ret;
415 }
416
417 static int fill_res_name_pid(struct sk_buff *msg,
418 struct rdma_restrack_entry *res)
419 {
420 int err = 0;
421
422 /*
423 * For user resources, user is should read /proc/PID/comm to get the
424 * name of the task file.
425 */
426 if (rdma_is_kernel_res(res)) {
427 err = nla_put_string(msg, RDMA_NLDEV_ATTR_RES_KERN_NAME,
428 res->kern_name);
429 } else {
430 pid_t pid;
431
432 pid = task_pid_vnr(res->task);
433 /*
434 * Task is dead and in zombie state.
435 * There is no need to print PID anymore.
436 */
437 if (pid)
438 /*
439 * This part is racy, task can be killed and PID will
440 * be zero right here but it is ok, next query won't
441 * return PID. We don't promise real-time reflection
442 * of SW objects.
443 */
444 err = nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PID, pid);
445 }
446
447 return err ? -EMSGSIZE : 0;
448 }
449
450 static int fill_res_qp_entry_query(struct sk_buff *msg,
451 struct rdma_restrack_entry *res,
452 struct ib_device *dev,
453 struct ib_qp *qp)
454 {
455 struct ib_qp_init_attr qp_init_attr;
456 struct ib_qp_attr qp_attr;
457 int ret;
458
459 ret = ib_query_qp(qp, &qp_attr, 0, &qp_init_attr);
460 if (ret)
461 return ret;
462
463 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC) {
464 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQPN,
465 qp_attr.dest_qp_num))
466 goto err;
467 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQ_PSN,
468 qp_attr.rq_psn))
469 goto err;
470 }
471
472 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_SQ_PSN, qp_attr.sq_psn))
473 goto err;
474
475 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC ||
476 qp->qp_type == IB_QPT_XRC_INI || qp->qp_type == IB_QPT_XRC_TGT) {
477 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE,
478 qp_attr.path_mig_state))
479 goto err;
480 }
481 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, qp->qp_type))
482 goto err;
483 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, qp_attr.qp_state))
484 goto err;
485
486 if (dev->ops.fill_res_qp_entry)
487 return dev->ops.fill_res_qp_entry(msg, qp);
488 return 0;
489
490 err: return -EMSGSIZE;
491 }
492
493 static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
494 struct rdma_restrack_entry *res, uint32_t port)
495 {
496 struct ib_qp *qp = container_of(res, struct ib_qp, res);
497 struct ib_device *dev = qp->device;
498 int ret;
499
500 if (port && port != qp->port)
501 return -EAGAIN;
502
503 /* In create_qp() port is not set yet */
504 if (qp->port && nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, qp->port))
505 return -EINVAL;
506
507 ret = nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qp->qp_num);
508 if (ret)
509 return -EMSGSIZE;
510
511 if (!rdma_is_kernel_res(res) &&
512 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, qp->pd->res.id))
513 return -EMSGSIZE;
514
515 ret = fill_res_name_pid(msg, res);
516 if (ret)
517 return -EMSGSIZE;
518
519 return fill_res_qp_entry_query(msg, res, dev, qp);
520 }
521
522 static int fill_res_qp_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
523 struct rdma_restrack_entry *res, uint32_t port)
524 {
525 struct ib_qp *qp = container_of(res, struct ib_qp, res);
526 struct ib_device *dev = qp->device;
527
528 if (port && port != qp->port)
529 return -EAGAIN;
530 if (!dev->ops.fill_res_qp_entry_raw)
531 return -EINVAL;
532 return dev->ops.fill_res_qp_entry_raw(msg, qp);
533 }
534
535 static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
536 struct rdma_restrack_entry *res, uint32_t port)
537 {
538 struct rdma_id_private *id_priv =
539 container_of(res, struct rdma_id_private, res);
540 struct ib_device *dev = id_priv->id.device;
541 struct rdma_cm_id *cm_id = &id_priv->id;
542
543 if (port && port != cm_id->port_num)
544 return 0;
545
546 if (cm_id->port_num &&
547 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num))
548 goto err;
549
550 if (id_priv->qp_num) {
551 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, id_priv->qp_num))
552 goto err;
553 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, cm_id->qp_type))
554 goto err;
555 }
556
557 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PS, cm_id->ps))
558 goto err;
559
560 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, id_priv->state))
561 goto err;
562
563 if (cm_id->route.addr.src_addr.ss_family &&
564 nla_put(msg, RDMA_NLDEV_ATTR_RES_SRC_ADDR,
565 sizeof(cm_id->route.addr.src_addr),
566 &cm_id->route.addr.src_addr))
567 goto err;
568 if (cm_id->route.addr.dst_addr.ss_family &&
569 nla_put(msg, RDMA_NLDEV_ATTR_RES_DST_ADDR,
570 sizeof(cm_id->route.addr.dst_addr),
571 &cm_id->route.addr.dst_addr))
572 goto err;
573
574 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CM_IDN, res->id))
575 goto err;
576
577 if (fill_res_name_pid(msg, res))
578 goto err;
579
580 if (dev->ops.fill_res_cm_id_entry)
581 return dev->ops.fill_res_cm_id_entry(msg, cm_id);
582 return 0;
583
584 err: return -EMSGSIZE;
585 }
586
587 static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
588 struct rdma_restrack_entry *res, uint32_t port)
589 {
590 struct ib_cq *cq = container_of(res, struct ib_cq, res);
591 struct ib_device *dev = cq->device;
592
593 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))
594 return -EMSGSIZE;
595 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
596 atomic_read(&cq->usecnt), RDMA_NLDEV_ATTR_PAD))
597 return -EMSGSIZE;
598
599 /* Poll context is only valid for kernel CQs */
600 if (rdma_is_kernel_res(res) &&
601 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
602 return -EMSGSIZE;
603
604 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, (cq->dim != NULL)))
605 return -EMSGSIZE;
606
607 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN, res->id))
608 return -EMSGSIZE;
609 if (!rdma_is_kernel_res(res) &&
610 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN,
611 cq->uobject->uevent.uobject.context->res.id))
612 return -EMSGSIZE;
613
614 if (fill_res_name_pid(msg, res))
615 return -EMSGSIZE;
616
617 return (dev->ops.fill_res_cq_entry) ?
618 dev->ops.fill_res_cq_entry(msg, cq) : 0;
619 }
620
621 static int fill_res_cq_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
622 struct rdma_restrack_entry *res, uint32_t port)
623 {
624 struct ib_cq *cq = container_of(res, struct ib_cq, res);
625 struct ib_device *dev = cq->device;
626
627 if (!dev->ops.fill_res_cq_entry_raw)
628 return -EINVAL;
629 return dev->ops.fill_res_cq_entry_raw(msg, cq);
630 }
631
632 static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
633 struct rdma_restrack_entry *res, uint32_t port)
634 {
635 struct ib_mr *mr = container_of(res, struct ib_mr, res);
636 struct ib_device *dev = mr->pd->device;
637
638 if (has_cap_net_admin) {
639 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RKEY, mr->rkey))
640 return -EMSGSIZE;
641 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LKEY, mr->lkey))
642 return -EMSGSIZE;
643 }
644
645 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length,
646 RDMA_NLDEV_ATTR_PAD))
647 return -EMSGSIZE;
648
649 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
650 return -EMSGSIZE;
651
652 if (!rdma_is_kernel_res(res) &&
653 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, mr->pd->res.id))
654 return -EMSGSIZE;
655
656 if (fill_res_name_pid(msg, res))
657 return -EMSGSIZE;
658
659 return (dev->ops.fill_res_mr_entry) ?
660 dev->ops.fill_res_mr_entry(msg, mr) :
661 0;
662 }
663
664 static int fill_res_mr_raw_entry(struct sk_buff *msg, bool has_cap_net_admin,
665 struct rdma_restrack_entry *res, uint32_t port)
666 {
667 struct ib_mr *mr = container_of(res, struct ib_mr, res);
668 struct ib_device *dev = mr->pd->device;
669
670 if (!dev->ops.fill_res_mr_entry_raw)
671 return -EINVAL;
672 return dev->ops.fill_res_mr_entry_raw(msg, mr);
673 }
674
675 static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
676 struct rdma_restrack_entry *res, uint32_t port)
677 {
678 struct ib_pd *pd = container_of(res, struct ib_pd, res);
679
680 if (has_cap_net_admin) {
681 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY,
682 pd->local_dma_lkey))
683 goto err;
684 if ((pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) &&
685 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY,
686 pd->unsafe_global_rkey))
687 goto err;
688 }
689 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
690 atomic_read(&pd->usecnt), RDMA_NLDEV_ATTR_PAD))
691 goto err;
692
693 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, res->id))
694 goto err;
695
696 if (!rdma_is_kernel_res(res) &&
697 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN,
698 pd->uobject->context->res.id))
699 goto err;
700
701 return fill_res_name_pid(msg, res);
702
703 err: return -EMSGSIZE;
704 }
705
706 static int fill_stat_counter_mode(struct sk_buff *msg,
707 struct rdma_counter *counter)
708 {
709 struct rdma_counter_mode *m = &counter->mode;
710
711 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_MODE, m->mode))
712 return -EMSGSIZE;
713
714 if (m->mode == RDMA_COUNTER_MODE_AUTO) {
715 if ((m->mask & RDMA_COUNTER_MASK_QP_TYPE) &&
716 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, m->param.qp_type))
717 return -EMSGSIZE;
718
719 if ((m->mask & RDMA_COUNTER_MASK_PID) &&
720 fill_res_name_pid(msg, &counter->res))
721 return -EMSGSIZE;
722 }
723
724 return 0;
725 }
726
727 static int fill_stat_counter_qp_entry(struct sk_buff *msg, u32 qpn)
728 {
729 struct nlattr *entry_attr;
730
731 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP_ENTRY);
732 if (!entry_attr)
733 return -EMSGSIZE;
734
735 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn))
736 goto err;
737
738 nla_nest_end(msg, entry_attr);
739 return 0;
740
741 err:
742 nla_nest_cancel(msg, entry_attr);
743 return -EMSGSIZE;
744 }
745
746 static int fill_stat_counter_qps(struct sk_buff *msg,
747 struct rdma_counter *counter)
748 {
749 struct rdma_restrack_entry *res;
750 struct rdma_restrack_root *rt;
751 struct nlattr *table_attr;
752 struct ib_qp *qp = NULL;
753 unsigned long id = 0;
754 int ret = 0;
755
756 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP);
757
758 rt = &counter->device->res[RDMA_RESTRACK_QP];
759 xa_lock(&rt->xa);
760 xa_for_each(&rt->xa, id, res) {
761 qp = container_of(res, struct ib_qp, res);
762 if (!qp->counter || (qp->counter->id != counter->id))
763 continue;
764
765 ret = fill_stat_counter_qp_entry(msg, qp->qp_num);
766 if (ret)
767 goto err;
768 }
769
770 xa_unlock(&rt->xa);
771 nla_nest_end(msg, table_attr);
772 return 0;
773
774 err:
775 xa_unlock(&rt->xa);
776 nla_nest_cancel(msg, table_attr);
777 return ret;
778 }
779
780 int rdma_nl_stat_hwcounter_entry(struct sk_buff *msg, const char *name,
781 u64 value)
782 {
783 struct nlattr *entry_attr;
784
785 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY);
786 if (!entry_attr)
787 return -EMSGSIZE;
788
789 if (nla_put_string(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME,
790 name))
791 goto err;
792 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE,
793 value, RDMA_NLDEV_ATTR_PAD))
794 goto err;
795
796 nla_nest_end(msg, entry_attr);
797 return 0;
798
799 err:
800 nla_nest_cancel(msg, entry_attr);
801 return -EMSGSIZE;
802 }
803 EXPORT_SYMBOL(rdma_nl_stat_hwcounter_entry);
804
805 static int fill_stat_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
806 struct rdma_restrack_entry *res, uint32_t port)
807 {
808 struct ib_mr *mr = container_of(res, struct ib_mr, res);
809 struct ib_device *dev = mr->pd->device;
810
811 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
812 goto err;
813
814 if (dev->ops.fill_stat_mr_entry)
815 return dev->ops.fill_stat_mr_entry(msg, mr);
816 return 0;
817
818 err:
819 return -EMSGSIZE;
820 }
821
822 static int fill_stat_counter_hwcounters(struct sk_buff *msg,
823 struct rdma_counter *counter)
824 {
825 struct rdma_hw_stats *st = counter->stats;
826 struct nlattr *table_attr;
827 int i;
828
829 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
830 if (!table_attr)
831 return -EMSGSIZE;
832
833 for (i = 0; i < st->num_counters; i++)
834 if (rdma_nl_stat_hwcounter_entry(msg, st->names[i], st->value[i]))
835 goto err;
836
837 nla_nest_end(msg, table_attr);
838 return 0;
839
840 err:
841 nla_nest_cancel(msg, table_attr);
842 return -EMSGSIZE;
843 }
844
845 static int fill_res_counter_entry(struct sk_buff *msg, bool has_cap_net_admin,
846 struct rdma_restrack_entry *res,
847 uint32_t port)
848 {
849 struct rdma_counter *counter =
850 container_of(res, struct rdma_counter, res);
851
852 if (port && port != counter->port)
853 return -EAGAIN;
854
855 /* Dump it even query failed */
856 rdma_counter_query_stats(counter);
857
858 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, counter->port) ||
859 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, counter->id) ||
860 fill_stat_counter_mode(msg, counter) ||
861 fill_stat_counter_qps(msg, counter) ||
862 fill_stat_counter_hwcounters(msg, counter))
863 return -EMSGSIZE;
864
865 return 0;
866 }
867
868 static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
869 struct netlink_ext_ack *extack)
870 {
871 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
872 struct ib_device *device;
873 struct sk_buff *msg;
874 u32 index;
875 int err;
876
877 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
878 nldev_policy, extack);
879 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
880 return -EINVAL;
881
882 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
883
884 device = ib_device_get_by_index(sock_net(skb->sk), index);
885 if (!device)
886 return -EINVAL;
887
888 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
889 if (!msg) {
890 err = -ENOMEM;
891 goto err;
892 }
893
894 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
895 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
896 0, 0);
897
898 err = fill_dev_info(msg, device);
899 if (err)
900 goto err_free;
901
902 nlmsg_end(msg, nlh);
903
904 ib_device_put(device);
905 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
906
907 err_free:
908 nlmsg_free(msg);
909 err:
910 ib_device_put(device);
911 return err;
912 }
913
914 static int nldev_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
915 struct netlink_ext_ack *extack)
916 {
917 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
918 struct ib_device *device;
919 u32 index;
920 int err;
921
922 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
923 nldev_policy, extack);
924 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
925 return -EINVAL;
926
927 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
928 device = ib_device_get_by_index(sock_net(skb->sk), index);
929 if (!device)
930 return -EINVAL;
931
932 if (tb[RDMA_NLDEV_ATTR_DEV_NAME]) {
933 char name[IB_DEVICE_NAME_MAX] = {};
934
935 nla_strscpy(name, tb[RDMA_NLDEV_ATTR_DEV_NAME],
936 IB_DEVICE_NAME_MAX);
937 if (strlen(name) == 0) {
938 err = -EINVAL;
939 goto done;
940 }
941 err = ib_device_rename(device, name);
942 goto done;
943 }
944
945 if (tb[RDMA_NLDEV_NET_NS_FD]) {
946 u32 ns_fd;
947
948 ns_fd = nla_get_u32(tb[RDMA_NLDEV_NET_NS_FD]);
949 err = ib_device_set_netns_put(skb, device, ns_fd);
950 goto put_done;
951 }
952
953 if (tb[RDMA_NLDEV_ATTR_DEV_DIM]) {
954 u8 use_dim;
955
956 use_dim = nla_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
957 err = ib_device_set_dim(device, use_dim);
958 goto done;
959 }
960
961 done:
962 ib_device_put(device);
963 put_done:
964 return err;
965 }
966
967 static int _nldev_get_dumpit(struct ib_device *device,
968 struct sk_buff *skb,
969 struct netlink_callback *cb,
970 unsigned int idx)
971 {
972 int start = cb->args[0];
973 struct nlmsghdr *nlh;
974
975 if (idx < start)
976 return 0;
977
978 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
979 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
980 0, NLM_F_MULTI);
981
982 if (fill_dev_info(skb, device)) {
983 nlmsg_cancel(skb, nlh);
984 goto out;
985 }
986
987 nlmsg_end(skb, nlh);
988
989 idx++;
990
991 out: cb->args[0] = idx;
992 return skb->len;
993 }
994
995 static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
996 {
997 /*
998 * There is no need to take lock, because
999 * we are relying on ib_core's locking.
1000 */
1001 return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);
1002 }
1003
1004 static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1005 struct netlink_ext_ack *extack)
1006 {
1007 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1008 struct ib_device *device;
1009 struct sk_buff *msg;
1010 u32 index;
1011 u32 port;
1012 int err;
1013
1014 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1015 nldev_policy, extack);
1016 if (err ||
1017 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
1018 !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
1019 return -EINVAL;
1020
1021 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1022 device = ib_device_get_by_index(sock_net(skb->sk), index);
1023 if (!device)
1024 return -EINVAL;
1025
1026 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1027 if (!rdma_is_port_valid(device, port)) {
1028 err = -EINVAL;
1029 goto err;
1030 }
1031
1032 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1033 if (!msg) {
1034 err = -ENOMEM;
1035 goto err;
1036 }
1037
1038 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1039 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
1040 0, 0);
1041
1042 err = fill_port_info(msg, device, port, sock_net(skb->sk));
1043 if (err)
1044 goto err_free;
1045
1046 nlmsg_end(msg, nlh);
1047 ib_device_put(device);
1048
1049 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1050
1051 err_free:
1052 nlmsg_free(msg);
1053 err:
1054 ib_device_put(device);
1055 return err;
1056 }
1057
1058 static int nldev_port_get_dumpit(struct sk_buff *skb,
1059 struct netlink_callback *cb)
1060 {
1061 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1062 struct ib_device *device;
1063 int start = cb->args[0];
1064 struct nlmsghdr *nlh;
1065 u32 idx = 0;
1066 u32 ifindex;
1067 int err;
1068 unsigned int p;
1069
1070 err = nlmsg_parse_deprecated(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1071 nldev_policy, NULL);
1072 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1073 return -EINVAL;
1074
1075 ifindex = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1076 device = ib_device_get_by_index(sock_net(skb->sk), ifindex);
1077 if (!device)
1078 return -EINVAL;
1079
1080 rdma_for_each_port (device, p) {
1081 /*
1082 * The dumpit function returns all information from specific
1083 * index. This specific index is taken from the netlink
1084 * messages request sent by user and it is available
1085 * in cb->args[0].
1086 *
1087 * Usually, the user doesn't fill this field and it causes
1088 * to return everything.
1089 *
1090 */
1091 if (idx < start) {
1092 idx++;
1093 continue;
1094 }
1095
1096 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
1097 cb->nlh->nlmsg_seq,
1098 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1099 RDMA_NLDEV_CMD_PORT_GET),
1100 0, NLM_F_MULTI);
1101
1102 if (fill_port_info(skb, device, p, sock_net(skb->sk))) {
1103 nlmsg_cancel(skb, nlh);
1104 goto out;
1105 }
1106 idx++;
1107 nlmsg_end(skb, nlh);
1108 }
1109
1110 out:
1111 ib_device_put(device);
1112 cb->args[0] = idx;
1113 return skb->len;
1114 }
1115
1116 static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1117 struct netlink_ext_ack *extack)
1118 {
1119 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1120 struct ib_device *device;
1121 struct sk_buff *msg;
1122 u32 index;
1123 int ret;
1124
1125 ret = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1126 nldev_policy, extack);
1127 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1128 return -EINVAL;
1129
1130 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1131 device = ib_device_get_by_index(sock_net(skb->sk), index);
1132 if (!device)
1133 return -EINVAL;
1134
1135 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1136 if (!msg) {
1137 ret = -ENOMEM;
1138 goto err;
1139 }
1140
1141 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1142 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
1143 0, 0);
1144
1145 ret = fill_res_info(msg, device);
1146 if (ret)
1147 goto err_free;
1148
1149 nlmsg_end(msg, nlh);
1150 ib_device_put(device);
1151 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1152
1153 err_free:
1154 nlmsg_free(msg);
1155 err:
1156 ib_device_put(device);
1157 return ret;
1158 }
1159
1160 static int _nldev_res_get_dumpit(struct ib_device *device,
1161 struct sk_buff *skb,
1162 struct netlink_callback *cb,
1163 unsigned int idx)
1164 {
1165 int start = cb->args[0];
1166 struct nlmsghdr *nlh;
1167
1168 if (idx < start)
1169 return 0;
1170
1171 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1172 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
1173 0, NLM_F_MULTI);
1174
1175 if (fill_res_info(skb, device)) {
1176 nlmsg_cancel(skb, nlh);
1177 goto out;
1178 }
1179 nlmsg_end(skb, nlh);
1180
1181 idx++;
1182
1183 out:
1184 cb->args[0] = idx;
1185 return skb->len;
1186 }
1187
1188 static int nldev_res_get_dumpit(struct sk_buff *skb,
1189 struct netlink_callback *cb)
1190 {
1191 return ib_enum_all_devs(_nldev_res_get_dumpit, skb, cb);
1192 }
1193
1194 struct nldev_fill_res_entry {
1195 enum rdma_nldev_attr nldev_attr;
1196 u8 flags;
1197 u32 entry;
1198 u32 id;
1199 };
1200
1201 enum nldev_res_flags {
1202 NLDEV_PER_DEV = 1 << 0,
1203 };
1204
1205 static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
1206 [RDMA_RESTRACK_QP] = {
1207 .nldev_attr = RDMA_NLDEV_ATTR_RES_QP,
1208 .entry = RDMA_NLDEV_ATTR_RES_QP_ENTRY,
1209 .id = RDMA_NLDEV_ATTR_RES_LQPN,
1210 },
1211 [RDMA_RESTRACK_CM_ID] = {
1212 .nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
1213 .entry = RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY,
1214 .id = RDMA_NLDEV_ATTR_RES_CM_IDN,
1215 },
1216 [RDMA_RESTRACK_CQ] = {
1217 .nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
1218 .flags = NLDEV_PER_DEV,
1219 .entry = RDMA_NLDEV_ATTR_RES_CQ_ENTRY,
1220 .id = RDMA_NLDEV_ATTR_RES_CQN,
1221 },
1222 [RDMA_RESTRACK_MR] = {
1223 .nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
1224 .flags = NLDEV_PER_DEV,
1225 .entry = RDMA_NLDEV_ATTR_RES_MR_ENTRY,
1226 .id = RDMA_NLDEV_ATTR_RES_MRN,
1227 },
1228 [RDMA_RESTRACK_PD] = {
1229 .nldev_attr = RDMA_NLDEV_ATTR_RES_PD,
1230 .flags = NLDEV_PER_DEV,
1231 .entry = RDMA_NLDEV_ATTR_RES_PD_ENTRY,
1232 .id = RDMA_NLDEV_ATTR_RES_PDN,
1233 },
1234 [RDMA_RESTRACK_COUNTER] = {
1235 .nldev_attr = RDMA_NLDEV_ATTR_STAT_COUNTER,
1236 .entry = RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY,
1237 .id = RDMA_NLDEV_ATTR_STAT_COUNTER_ID,
1238 },
1239 };
1240
1241 static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1242 struct netlink_ext_ack *extack,
1243 enum rdma_restrack_type res_type,
1244 res_fill_func_t fill_func)
1245 {
1246 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
1247 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1248 struct rdma_restrack_entry *res;
1249 struct ib_device *device;
1250 u32 index, id, port = 0;
1251 bool has_cap_net_admin;
1252 struct sk_buff *msg;
1253 int ret;
1254
1255 ret = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1256 nldev_policy, extack);
1257 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !fe->id || !tb[fe->id])
1258 return -EINVAL;
1259
1260 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1261 device = ib_device_get_by_index(sock_net(skb->sk), index);
1262 if (!device)
1263 return -EINVAL;
1264
1265 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1266 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1267 if (!rdma_is_port_valid(device, port)) {
1268 ret = -EINVAL;
1269 goto err;
1270 }
1271 }
1272
1273 if ((port && fe->flags & NLDEV_PER_DEV) ||
1274 (!port && ~fe->flags & NLDEV_PER_DEV)) {
1275 ret = -EINVAL;
1276 goto err;
1277 }
1278
1279 id = nla_get_u32(tb[fe->id]);
1280 res = rdma_restrack_get_byid(device, res_type, id);
1281 if (IS_ERR(res)) {
1282 ret = PTR_ERR(res);
1283 goto err;
1284 }
1285
1286 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1287 if (!msg) {
1288 ret = -ENOMEM;
1289 goto err_get;
1290 }
1291
1292 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1293 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1294 RDMA_NL_GET_OP(nlh->nlmsg_type)),
1295 0, 0);
1296
1297 if (fill_nldev_handle(msg, device)) {
1298 ret = -EMSGSIZE;
1299 goto err_free;
1300 }
1301
1302 has_cap_net_admin = netlink_capable(skb, CAP_NET_ADMIN);
1303
1304 ret = fill_func(msg, has_cap_net_admin, res, port);
1305 if (ret)
1306 goto err_free;
1307
1308 rdma_restrack_put(res);
1309 nlmsg_end(msg, nlh);
1310 ib_device_put(device);
1311 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1312
1313 err_free:
1314 nlmsg_free(msg);
1315 err_get:
1316 rdma_restrack_put(res);
1317 err:
1318 ib_device_put(device);
1319 return ret;
1320 }
1321
1322 static int res_get_common_dumpit(struct sk_buff *skb,
1323 struct netlink_callback *cb,
1324 enum rdma_restrack_type res_type,
1325 res_fill_func_t fill_func)
1326 {
1327 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
1328 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1329 struct rdma_restrack_entry *res;
1330 struct rdma_restrack_root *rt;
1331 int err, ret = 0, idx = 0;
1332 struct nlattr *table_attr;
1333 struct nlattr *entry_attr;
1334 struct ib_device *device;
1335 int start = cb->args[0];
1336 bool has_cap_net_admin;
1337 struct nlmsghdr *nlh;
1338 unsigned long id;
1339 u32 index, port = 0;
1340 bool filled = false;
1341
1342 err = nlmsg_parse_deprecated(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1343 nldev_policy, NULL);
1344 /*
1345 * Right now, we are expecting the device index to get res information,
1346 * but it is possible to extend this code to return all devices in
1347 * one shot by checking the existence of RDMA_NLDEV_ATTR_DEV_INDEX.
1348 * if it doesn't exist, we will iterate over all devices.
1349 *
1350 * But it is not needed for now.
1351 */
1352 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1353 return -EINVAL;
1354
1355 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1356 device = ib_device_get_by_index(sock_net(skb->sk), index);
1357 if (!device)
1358 return -EINVAL;
1359
1360 /*
1361 * If no PORT_INDEX is supplied, we will return all QPs from that device
1362 */
1363 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1364 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1365 if (!rdma_is_port_valid(device, port)) {
1366 ret = -EINVAL;
1367 goto err_index;
1368 }
1369 }
1370
1371 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1372 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1373 RDMA_NL_GET_OP(cb->nlh->nlmsg_type)),
1374 0, NLM_F_MULTI);
1375
1376 if (fill_nldev_handle(skb, device)) {
1377 ret = -EMSGSIZE;
1378 goto err;
1379 }
1380
1381 table_attr = nla_nest_start_noflag(skb, fe->nldev_attr);
1382 if (!table_attr) {
1383 ret = -EMSGSIZE;
1384 goto err;
1385 }
1386
1387 has_cap_net_admin = netlink_capable(cb->skb, CAP_NET_ADMIN);
1388
1389 rt = &device->res[res_type];
1390 xa_lock(&rt->xa);
1391 /*
1392 * FIXME: if the skip ahead is something common this loop should
1393 * use xas_for_each & xas_pause to optimize, we can have a lot of
1394 * objects.
1395 */
1396 xa_for_each(&rt->xa, id, res) {
1397 if (idx < start || !rdma_restrack_get(res))
1398 goto next;
1399
1400 xa_unlock(&rt->xa);
1401
1402 filled = true;
1403
1404 entry_attr = nla_nest_start_noflag(skb, fe->entry);
1405 if (!entry_attr) {
1406 ret = -EMSGSIZE;
1407 rdma_restrack_put(res);
1408 goto msg_full;
1409 }
1410
1411 ret = fill_func(skb, has_cap_net_admin, res, port);
1412
1413 rdma_restrack_put(res);
1414
1415 if (ret) {
1416 nla_nest_cancel(skb, entry_attr);
1417 if (ret == -EMSGSIZE)
1418 goto msg_full;
1419 if (ret == -EAGAIN)
1420 goto again;
1421 goto res_err;
1422 }
1423 nla_nest_end(skb, entry_attr);
1424 again: xa_lock(&rt->xa);
1425 next: idx++;
1426 }
1427 xa_unlock(&rt->xa);
1428
1429 msg_full:
1430 nla_nest_end(skb, table_attr);
1431 nlmsg_end(skb, nlh);
1432 cb->args[0] = idx;
1433
1434 /*
1435 * No more entries to fill, cancel the message and
1436 * return 0 to mark end of dumpit.
1437 */
1438 if (!filled)
1439 goto err;
1440
1441 ib_device_put(device);
1442 return skb->len;
1443
1444 res_err:
1445 nla_nest_cancel(skb, table_attr);
1446
1447 err:
1448 nlmsg_cancel(skb, nlh);
1449
1450 err_index:
1451 ib_device_put(device);
1452 return ret;
1453 }
1454
1455 #define RES_GET_FUNCS(name, type) \
1456 static int nldev_res_get_##name##_dumpit(struct sk_buff *skb, \
1457 struct netlink_callback *cb) \
1458 { \
1459 return res_get_common_dumpit(skb, cb, type, \
1460 fill_res_##name##_entry); \
1461 } \
1462 static int nldev_res_get_##name##_doit(struct sk_buff *skb, \
1463 struct nlmsghdr *nlh, \
1464 struct netlink_ext_ack *extack) \
1465 { \
1466 return res_get_common_doit(skb, nlh, extack, type, \
1467 fill_res_##name##_entry); \
1468 }
1469
1470 RES_GET_FUNCS(qp, RDMA_RESTRACK_QP);
1471 RES_GET_FUNCS(qp_raw, RDMA_RESTRACK_QP);
1472 RES_GET_FUNCS(cm_id, RDMA_RESTRACK_CM_ID);
1473 RES_GET_FUNCS(cq, RDMA_RESTRACK_CQ);
1474 RES_GET_FUNCS(cq_raw, RDMA_RESTRACK_CQ);
1475 RES_GET_FUNCS(pd, RDMA_RESTRACK_PD);
1476 RES_GET_FUNCS(mr, RDMA_RESTRACK_MR);
1477 RES_GET_FUNCS(mr_raw, RDMA_RESTRACK_MR);
1478 RES_GET_FUNCS(counter, RDMA_RESTRACK_COUNTER);
1479
1480 static LIST_HEAD(link_ops);
1481 static DECLARE_RWSEM(link_ops_rwsem);
1482
1483 static const struct rdma_link_ops *link_ops_get(const char *type)
1484 {
1485 const struct rdma_link_ops *ops;
1486
1487 list_for_each_entry(ops, &link_ops, list) {
1488 if (!strcmp(ops->type, type))
1489 goto out;
1490 }
1491 ops = NULL;
1492 out:
1493 return ops;
1494 }
1495
1496 void rdma_link_register(struct rdma_link_ops *ops)
1497 {
1498 down_write(&link_ops_rwsem);
1499 if (WARN_ON_ONCE(link_ops_get(ops->type)))
1500 goto out;
1501 list_add(&ops->list, &link_ops);
1502 out:
1503 up_write(&link_ops_rwsem);
1504 }
1505 EXPORT_SYMBOL(rdma_link_register);
1506
1507 void rdma_link_unregister(struct rdma_link_ops *ops)
1508 {
1509 down_write(&link_ops_rwsem);
1510 list_del(&ops->list);
1511 up_write(&link_ops_rwsem);
1512 }
1513 EXPORT_SYMBOL(rdma_link_unregister);
1514
1515 static int nldev_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
1516 struct netlink_ext_ack *extack)
1517 {
1518 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1519 char ibdev_name[IB_DEVICE_NAME_MAX];
1520 const struct rdma_link_ops *ops;
1521 char ndev_name[IFNAMSIZ];
1522 struct net_device *ndev;
1523 char type[IFNAMSIZ];
1524 int err;
1525
1526 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1527 nldev_policy, extack);
1528 if (err || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
1529 !tb[RDMA_NLDEV_ATTR_LINK_TYPE] || !tb[RDMA_NLDEV_ATTR_NDEV_NAME])
1530 return -EINVAL;
1531
1532 nla_strscpy(ibdev_name, tb[RDMA_NLDEV_ATTR_DEV_NAME],
1533 sizeof(ibdev_name));
1534 if (strchr(ibdev_name, '%') || strlen(ibdev_name) == 0)
1535 return -EINVAL;
1536
1537 nla_strscpy(type, tb[RDMA_NLDEV_ATTR_LINK_TYPE], sizeof(type));
1538 nla_strscpy(ndev_name, tb[RDMA_NLDEV_ATTR_NDEV_NAME],
1539 sizeof(ndev_name));
1540
1541 ndev = dev_get_by_name(sock_net(skb->sk), ndev_name);
1542 if (!ndev)
1543 return -ENODEV;
1544
1545 down_read(&link_ops_rwsem);
1546 ops = link_ops_get(type);
1547 #ifdef CONFIG_MODULES
1548 if (!ops) {
1549 up_read(&link_ops_rwsem);
1550 request_module("rdma-link-%s", type);
1551 down_read(&link_ops_rwsem);
1552 ops = link_ops_get(type);
1553 }
1554 #endif
1555 err = ops ? ops->newlink(ibdev_name, ndev) : -EINVAL;
1556 up_read(&link_ops_rwsem);
1557 dev_put(ndev);
1558
1559 return err;
1560 }
1561
1562 static int nldev_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
1563 struct netlink_ext_ack *extack)
1564 {
1565 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1566 struct ib_device *device;
1567 u32 index;
1568 int err;
1569
1570 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1571 nldev_policy, extack);
1572 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1573 return -EINVAL;
1574
1575 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1576 device = ib_device_get_by_index(sock_net(skb->sk), index);
1577 if (!device)
1578 return -EINVAL;
1579
1580 if (!(device->attrs.device_cap_flags & IB_DEVICE_ALLOW_USER_UNREG)) {
1581 ib_device_put(device);
1582 return -EINVAL;
1583 }
1584
1585 ib_unregister_device_and_put(device);
1586 return 0;
1587 }
1588
1589 static int nldev_get_chardev(struct sk_buff *skb, struct nlmsghdr *nlh,
1590 struct netlink_ext_ack *extack)
1591 {
1592 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1593 char client_name[RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE];
1594 struct ib_client_nl_info data = {};
1595 struct ib_device *ibdev = NULL;
1596 struct sk_buff *msg;
1597 u32 index;
1598 int err;
1599
1600 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, nldev_policy,
1601 extack);
1602 if (err || !tb[RDMA_NLDEV_ATTR_CHARDEV_TYPE])
1603 return -EINVAL;
1604
1605 nla_strscpy(client_name, tb[RDMA_NLDEV_ATTR_CHARDEV_TYPE],
1606 sizeof(client_name));
1607
1608 if (tb[RDMA_NLDEV_ATTR_DEV_INDEX]) {
1609 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1610 ibdev = ib_device_get_by_index(sock_net(skb->sk), index);
1611 if (!ibdev)
1612 return -EINVAL;
1613
1614 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1615 data.port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1616 if (!rdma_is_port_valid(ibdev, data.port)) {
1617 err = -EINVAL;
1618 goto out_put;
1619 }
1620 } else {
1621 data.port = -1;
1622 }
1623 } else if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1624 return -EINVAL;
1625 }
1626
1627 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1628 if (!msg) {
1629 err = -ENOMEM;
1630 goto out_put;
1631 }
1632 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1633 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1634 RDMA_NLDEV_CMD_GET_CHARDEV),
1635 0, 0);
1636
1637 data.nl_msg = msg;
1638 err = ib_get_client_nl_info(ibdev, client_name, &data);
1639 if (err)
1640 goto out_nlmsg;
1641
1642 err = nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CHARDEV,
1643 huge_encode_dev(data.cdev->devt),
1644 RDMA_NLDEV_ATTR_PAD);
1645 if (err)
1646 goto out_data;
1647 err = nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CHARDEV_ABI, data.abi,
1648 RDMA_NLDEV_ATTR_PAD);
1649 if (err)
1650 goto out_data;
1651 if (nla_put_string(msg, RDMA_NLDEV_ATTR_CHARDEV_NAME,
1652 dev_name(data.cdev))) {
1653 err = -EMSGSIZE;
1654 goto out_data;
1655 }
1656
1657 nlmsg_end(msg, nlh);
1658 put_device(data.cdev);
1659 if (ibdev)
1660 ib_device_put(ibdev);
1661 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1662
1663 out_data:
1664 put_device(data.cdev);
1665 out_nlmsg:
1666 nlmsg_free(msg);
1667 out_put:
1668 if (ibdev)
1669 ib_device_put(ibdev);
1670 return err;
1671 }
1672
1673 static int nldev_sys_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1674 struct netlink_ext_ack *extack)
1675 {
1676 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1677 struct sk_buff *msg;
1678 int err;
1679
1680 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1681 nldev_policy, extack);
1682 if (err)
1683 return err;
1684
1685 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1686 if (!msg)
1687 return -ENOMEM;
1688
1689 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1690 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1691 RDMA_NLDEV_CMD_SYS_GET),
1692 0, 0);
1693
1694 err = nla_put_u8(msg, RDMA_NLDEV_SYS_ATTR_NETNS_MODE,
1695 (u8)ib_devices_shared_netns);
1696 if (err) {
1697 nlmsg_free(msg);
1698 return err;
1699 }
1700 nlmsg_end(msg, nlh);
1701 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1702 }
1703
1704 static int nldev_set_sys_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1705 struct netlink_ext_ack *extack)
1706 {
1707 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1708 u8 enable;
1709 int err;
1710
1711 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1712 nldev_policy, extack);
1713 if (err || !tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE])
1714 return -EINVAL;
1715
1716 enable = nla_get_u8(tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]);
1717 /* Only 0 and 1 are supported */
1718 if (enable > 1)
1719 return -EINVAL;
1720
1721 err = rdma_compatdev_set(enable);
1722 return err;
1723 }
1724
1725 static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1726 struct netlink_ext_ack *extack)
1727 {
1728 u32 index, port, mode, mask = 0, qpn, cntn = 0;
1729 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1730 struct ib_device *device;
1731 struct sk_buff *msg;
1732 int ret;
1733
1734 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1735 nldev_policy, extack);
1736 /* Currently only counter for QP is supported */
1737 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES] ||
1738 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
1739 !tb[RDMA_NLDEV_ATTR_PORT_INDEX] || !tb[RDMA_NLDEV_ATTR_STAT_MODE])
1740 return -EINVAL;
1741
1742 if (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
1743 return -EINVAL;
1744
1745 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1746 device = ib_device_get_by_index(sock_net(skb->sk), index);
1747 if (!device)
1748 return -EINVAL;
1749
1750 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1751 if (!rdma_is_port_valid(device, port)) {
1752 ret = -EINVAL;
1753 goto err;
1754 }
1755
1756 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1757 if (!msg) {
1758 ret = -ENOMEM;
1759 goto err;
1760 }
1761 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1762 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1763 RDMA_NLDEV_CMD_STAT_SET),
1764 0, 0);
1765
1766 mode = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_MODE]);
1767 if (mode == RDMA_COUNTER_MODE_AUTO) {
1768 if (tb[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK])
1769 mask = nla_get_u32(
1770 tb[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK]);
1771
1772 ret = rdma_counter_set_auto_mode(device, port,
1773 mask ? true : false, mask);
1774 if (ret)
1775 goto err_msg;
1776 } else {
1777 if (!tb[RDMA_NLDEV_ATTR_RES_LQPN])
1778 goto err_msg;
1779 qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]);
1780 if (tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]) {
1781 cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]);
1782 ret = rdma_counter_bind_qpn(device, port, qpn, cntn);
1783 } else {
1784 ret = rdma_counter_bind_qpn_alloc(device, port,
1785 qpn, &cntn);
1786 }
1787 if (ret)
1788 goto err_msg;
1789
1790 if (fill_nldev_handle(msg, device) ||
1791 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
1792 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, cntn) ||
1793 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn)) {
1794 ret = -EMSGSIZE;
1795 goto err_fill;
1796 }
1797 }
1798
1799 nlmsg_end(msg, nlh);
1800 ib_device_put(device);
1801 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1802
1803 err_fill:
1804 rdma_counter_unbind_qpn(device, port, qpn, cntn);
1805 err_msg:
1806 nlmsg_free(msg);
1807 err:
1808 ib_device_put(device);
1809 return ret;
1810 }
1811
1812 static int nldev_stat_del_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1813 struct netlink_ext_ack *extack)
1814 {
1815 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1816 struct ib_device *device;
1817 struct sk_buff *msg;
1818 u32 index, port, qpn, cntn;
1819 int ret;
1820
1821 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1822 nldev_policy, extack);
1823 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES] ||
1824 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX] ||
1825 !tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID] ||
1826 !tb[RDMA_NLDEV_ATTR_RES_LQPN])
1827 return -EINVAL;
1828
1829 if (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
1830 return -EINVAL;
1831
1832 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1833 device = ib_device_get_by_index(sock_net(skb->sk), index);
1834 if (!device)
1835 return -EINVAL;
1836
1837 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1838 if (!rdma_is_port_valid(device, port)) {
1839 ret = -EINVAL;
1840 goto err;
1841 }
1842
1843 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1844 if (!msg) {
1845 ret = -ENOMEM;
1846 goto err;
1847 }
1848 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1849 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1850 RDMA_NLDEV_CMD_STAT_SET),
1851 0, 0);
1852
1853 cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]);
1854 qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]);
1855 if (fill_nldev_handle(msg, device) ||
1856 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
1857 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, cntn) ||
1858 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn)) {
1859 ret = -EMSGSIZE;
1860 goto err_fill;
1861 }
1862
1863 ret = rdma_counter_unbind_qpn(device, port, qpn, cntn);
1864 if (ret)
1865 goto err_fill;
1866
1867 nlmsg_end(msg, nlh);
1868 ib_device_put(device);
1869 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1870
1871 err_fill:
1872 nlmsg_free(msg);
1873 err:
1874 ib_device_put(device);
1875 return ret;
1876 }
1877
1878 static int stat_get_doit_default_counter(struct sk_buff *skb,
1879 struct nlmsghdr *nlh,
1880 struct netlink_ext_ack *extack,
1881 struct nlattr *tb[])
1882 {
1883 struct rdma_hw_stats *stats;
1884 struct nlattr *table_attr;
1885 struct ib_device *device;
1886 int ret, num_cnts, i;
1887 struct sk_buff *msg;
1888 u32 index, port;
1889 u64 v;
1890
1891 if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
1892 return -EINVAL;
1893
1894 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1895 device = ib_device_get_by_index(sock_net(skb->sk), index);
1896 if (!device)
1897 return -EINVAL;
1898
1899 if (!device->ops.alloc_hw_stats || !device->ops.get_hw_stats) {
1900 ret = -EINVAL;
1901 goto err;
1902 }
1903
1904 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1905 if (!rdma_is_port_valid(device, port)) {
1906 ret = -EINVAL;
1907 goto err;
1908 }
1909
1910 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1911 if (!msg) {
1912 ret = -ENOMEM;
1913 goto err;
1914 }
1915
1916 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1917 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1918 RDMA_NLDEV_CMD_STAT_GET),
1919 0, 0);
1920
1921 if (fill_nldev_handle(msg, device) ||
1922 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) {
1923 ret = -EMSGSIZE;
1924 goto err_msg;
1925 }
1926
1927 stats = device->port_data ? device->port_data[port].hw_stats : NULL;
1928 if (stats == NULL) {
1929 ret = -EINVAL;
1930 goto err_msg;
1931 }
1932 mutex_lock(&stats->lock);
1933
1934 num_cnts = device->ops.get_hw_stats(device, stats, port, 0);
1935 if (num_cnts < 0) {
1936 ret = -EINVAL;
1937 goto err_stats;
1938 }
1939
1940 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
1941 if (!table_attr) {
1942 ret = -EMSGSIZE;
1943 goto err_stats;
1944 }
1945 for (i = 0; i < num_cnts; i++) {
1946 v = stats->value[i] +
1947 rdma_counter_get_hwstat_value(device, port, i);
1948 if (rdma_nl_stat_hwcounter_entry(msg, stats->names[i], v)) {
1949 ret = -EMSGSIZE;
1950 goto err_table;
1951 }
1952 }
1953 nla_nest_end(msg, table_attr);
1954
1955 mutex_unlock(&stats->lock);
1956 nlmsg_end(msg, nlh);
1957 ib_device_put(device);
1958 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1959
1960 err_table:
1961 nla_nest_cancel(msg, table_attr);
1962 err_stats:
1963 mutex_unlock(&stats->lock);
1964 err_msg:
1965 nlmsg_free(msg);
1966 err:
1967 ib_device_put(device);
1968 return ret;
1969 }
1970
1971 static int stat_get_doit_qp(struct sk_buff *skb, struct nlmsghdr *nlh,
1972 struct netlink_ext_ack *extack, struct nlattr *tb[])
1973
1974 {
1975 static enum rdma_nl_counter_mode mode;
1976 static enum rdma_nl_counter_mask mask;
1977 struct ib_device *device;
1978 struct sk_buff *msg;
1979 u32 index, port;
1980 int ret;
1981
1982 if (tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID])
1983 return nldev_res_get_counter_doit(skb, nlh, extack);
1984
1985 if (!tb[RDMA_NLDEV_ATTR_STAT_MODE] ||
1986 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
1987 return -EINVAL;
1988
1989 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1990 device = ib_device_get_by_index(sock_net(skb->sk), index);
1991 if (!device)
1992 return -EINVAL;
1993
1994 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1995 if (!rdma_is_port_valid(device, port)) {
1996 ret = -EINVAL;
1997 goto err;
1998 }
1999
2000 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2001 if (!msg) {
2002 ret = -ENOMEM;
2003 goto err;
2004 }
2005
2006 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
2007 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
2008 RDMA_NLDEV_CMD_STAT_GET),
2009 0, 0);
2010
2011 ret = rdma_counter_get_mode(device, port, &mode, &mask);
2012 if (ret)
2013 goto err_msg;
2014
2015 if (fill_nldev_handle(msg, device) ||
2016 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
2017 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_MODE, mode)) {
2018 ret = -EMSGSIZE;
2019 goto err_msg;
2020 }
2021
2022 if ((mode == RDMA_COUNTER_MODE_AUTO) &&
2023 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK, mask)) {
2024 ret = -EMSGSIZE;
2025 goto err_msg;
2026 }
2027
2028 nlmsg_end(msg, nlh);
2029 ib_device_put(device);
2030 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2031
2032 err_msg:
2033 nlmsg_free(msg);
2034 err:
2035 ib_device_put(device);
2036 return ret;
2037 }
2038
2039 static int nldev_stat_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
2040 struct netlink_ext_ack *extack)
2041 {
2042 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2043 int ret;
2044
2045 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2046 nldev_policy, extack);
2047 if (ret)
2048 return -EINVAL;
2049
2050 if (!tb[RDMA_NLDEV_ATTR_STAT_RES])
2051 return stat_get_doit_default_counter(skb, nlh, extack, tb);
2052
2053 switch (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES])) {
2054 case RDMA_NLDEV_ATTR_RES_QP:
2055 ret = stat_get_doit_qp(skb, nlh, extack, tb);
2056 break;
2057 case RDMA_NLDEV_ATTR_RES_MR:
2058 ret = res_get_common_doit(skb, nlh, extack, RDMA_RESTRACK_MR,
2059 fill_stat_mr_entry);
2060 break;
2061 default:
2062 ret = -EINVAL;
2063 break;
2064 }
2065
2066 return ret;
2067 }
2068
2069 static int nldev_stat_get_dumpit(struct sk_buff *skb,
2070 struct netlink_callback *cb)
2071 {
2072 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2073 int ret;
2074
2075 ret = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2076 nldev_policy, NULL);
2077 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES])
2078 return -EINVAL;
2079
2080 switch (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES])) {
2081 case RDMA_NLDEV_ATTR_RES_QP:
2082 ret = nldev_res_get_counter_dumpit(skb, cb);
2083 break;
2084 case RDMA_NLDEV_ATTR_RES_MR:
2085 ret = res_get_common_dumpit(skb, cb, RDMA_RESTRACK_MR,
2086 fill_stat_mr_entry);
2087 break;
2088 default:
2089 ret = -EINVAL;
2090 break;
2091 }
2092
2093 return ret;
2094 }
2095
2096 static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
2097 [RDMA_NLDEV_CMD_GET] = {
2098 .doit = nldev_get_doit,
2099 .dump = nldev_get_dumpit,
2100 },
2101 [RDMA_NLDEV_CMD_GET_CHARDEV] = {
2102 .doit = nldev_get_chardev,
2103 },
2104 [RDMA_NLDEV_CMD_SET] = {
2105 .doit = nldev_set_doit,
2106 .flags = RDMA_NL_ADMIN_PERM,
2107 },
2108 [RDMA_NLDEV_CMD_NEWLINK] = {
2109 .doit = nldev_newlink,
2110 .flags = RDMA_NL_ADMIN_PERM,
2111 },
2112 [RDMA_NLDEV_CMD_DELLINK] = {
2113 .doit = nldev_dellink,
2114 .flags = RDMA_NL_ADMIN_PERM,
2115 },
2116 [RDMA_NLDEV_CMD_PORT_GET] = {
2117 .doit = nldev_port_get_doit,
2118 .dump = nldev_port_get_dumpit,
2119 },
2120 [RDMA_NLDEV_CMD_RES_GET] = {
2121 .doit = nldev_res_get_doit,
2122 .dump = nldev_res_get_dumpit,
2123 },
2124 [RDMA_NLDEV_CMD_RES_QP_GET] = {
2125 .doit = nldev_res_get_qp_doit,
2126 .dump = nldev_res_get_qp_dumpit,
2127 },
2128 [RDMA_NLDEV_CMD_RES_CM_ID_GET] = {
2129 .doit = nldev_res_get_cm_id_doit,
2130 .dump = nldev_res_get_cm_id_dumpit,
2131 },
2132 [RDMA_NLDEV_CMD_RES_CQ_GET] = {
2133 .doit = nldev_res_get_cq_doit,
2134 .dump = nldev_res_get_cq_dumpit,
2135 },
2136 [RDMA_NLDEV_CMD_RES_MR_GET] = {
2137 .doit = nldev_res_get_mr_doit,
2138 .dump = nldev_res_get_mr_dumpit,
2139 },
2140 [RDMA_NLDEV_CMD_RES_PD_GET] = {
2141 .doit = nldev_res_get_pd_doit,
2142 .dump = nldev_res_get_pd_dumpit,
2143 },
2144 [RDMA_NLDEV_CMD_SYS_GET] = {
2145 .doit = nldev_sys_get_doit,
2146 },
2147 [RDMA_NLDEV_CMD_SYS_SET] = {
2148 .doit = nldev_set_sys_set_doit,
2149 },
2150 [RDMA_NLDEV_CMD_STAT_SET] = {
2151 .doit = nldev_stat_set_doit,
2152 .flags = RDMA_NL_ADMIN_PERM,
2153 },
2154 [RDMA_NLDEV_CMD_STAT_GET] = {
2155 .doit = nldev_stat_get_doit,
2156 .dump = nldev_stat_get_dumpit,
2157 },
2158 [RDMA_NLDEV_CMD_STAT_DEL] = {
2159 .doit = nldev_stat_del_doit,
2160 .flags = RDMA_NL_ADMIN_PERM,
2161 },
2162 [RDMA_NLDEV_CMD_RES_QP_GET_RAW] = {
2163 .doit = nldev_res_get_qp_raw_doit,
2164 .dump = nldev_res_get_qp_raw_dumpit,
2165 .flags = RDMA_NL_ADMIN_PERM,
2166 },
2167 [RDMA_NLDEV_CMD_RES_CQ_GET_RAW] = {
2168 .doit = nldev_res_get_cq_raw_doit,
2169 .dump = nldev_res_get_cq_raw_dumpit,
2170 .flags = RDMA_NL_ADMIN_PERM,
2171 },
2172 [RDMA_NLDEV_CMD_RES_MR_GET_RAW] = {
2173 .doit = nldev_res_get_mr_raw_doit,
2174 .dump = nldev_res_get_mr_raw_dumpit,
2175 .flags = RDMA_NL_ADMIN_PERM,
2176 },
2177 };
2178
2179 void __init nldev_init(void)
2180 {
2181 rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
2182 }
2183
2184 void __exit nldev_exit(void)
2185 {
2186 rdma_nl_unregister(RDMA_NL_NLDEV);
2187 }
2188
2189 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);
Linux with added FPC-III support