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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / infiniband / core / nldev.c
blob37b433aa730610e0f2d1806c37a5dbe31dae7d93
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_RKEY] = { .type = NLA_U32 },
118 [RDMA_NLDEV_ATTR_RES_RQPN] = { .type = NLA_U32 },
119 [RDMA_NLDEV_ATTR_RES_RQ_PSN] = { .type = NLA_U32 },
120 [RDMA_NLDEV_ATTR_RES_SQ_PSN] = { .type = NLA_U32 },
121 [RDMA_NLDEV_ATTR_RES_SRC_ADDR] = {
122 .len = sizeof(struct __kernel_sockaddr_storage) },
123 [RDMA_NLDEV_ATTR_RES_STATE] = { .type = NLA_U8 },
124 [RDMA_NLDEV_ATTR_RES_SUMMARY] = { .type = NLA_NESTED },
125 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY] = { .type = NLA_NESTED },
126 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR]= { .type = NLA_U64 },
127 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME]= { .type = NLA_NUL_STRING,
128 .len = RDMA_NLDEV_ATTR_EMPTY_STRING },
129 [RDMA_NLDEV_ATTR_RES_TYPE] = { .type = NLA_U8 },
130 [RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]= { .type = NLA_U32 },
131 [RDMA_NLDEV_ATTR_RES_USECNT] = { .type = NLA_U64 },
132 [RDMA_NLDEV_ATTR_SM_LID] = { .type = NLA_U32 },
133 [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 },
134 [RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK] = { .type = NLA_U32 },
135 [RDMA_NLDEV_ATTR_STAT_MODE] = { .type = NLA_U32 },
136 [RDMA_NLDEV_ATTR_STAT_RES] = { .type = NLA_U32 },
137 [RDMA_NLDEV_ATTR_STAT_COUNTER] = { .type = NLA_NESTED },
138 [RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY] = { .type = NLA_NESTED },
139 [RDMA_NLDEV_ATTR_STAT_COUNTER_ID] = { .type = NLA_U32 },
140 [RDMA_NLDEV_ATTR_STAT_HWCOUNTERS] = { .type = NLA_NESTED },
141 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY] = { .type = NLA_NESTED },
142 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME] = { .type = NLA_NUL_STRING },
143 [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE] = { .type = NLA_U64 },
144 [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 },
145 [RDMA_NLDEV_ATTR_UVERBS_DRIVER_ID] = { .type = NLA_U32 },
146 [RDMA_NLDEV_NET_NS_FD] = { .type = NLA_U32 },
147 [RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = { .type = NLA_U8 },
148 };
149
150 static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
151 enum rdma_nldev_print_type print_type)
152 {
153 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DRIVER_STRING, name))
154 return -EMSGSIZE;
155 if (print_type != RDMA_NLDEV_PRINT_TYPE_UNSPEC &&
156 nla_put_u8(msg, RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE, print_type))
157 return -EMSGSIZE;
158
159 return 0;
160 }
161
162 static int _rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name,
163 enum rdma_nldev_print_type print_type,
164 u32 value)
165 {
166 if (put_driver_name_print_type(msg, name, print_type))
167 return -EMSGSIZE;
168 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DRIVER_U32, value))
169 return -EMSGSIZE;
170
171 return 0;
172 }
173
174 static int _rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name,
175 enum rdma_nldev_print_type print_type,
176 u64 value)
177 {
178 if (put_driver_name_print_type(msg, name, print_type))
179 return -EMSGSIZE;
180 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_DRIVER_U64, value,
181 RDMA_NLDEV_ATTR_PAD))
182 return -EMSGSIZE;
183
184 return 0;
185 }
186
187 int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name,
188 const char *str)
189 {
190 if (put_driver_name_print_type(msg, name,
191 RDMA_NLDEV_PRINT_TYPE_UNSPEC))
192 return -EMSGSIZE;
193 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DRIVER_STRING, str))
194 return -EMSGSIZE;
195
196 return 0;
197 }
198 EXPORT_SYMBOL(rdma_nl_put_driver_string);
199
200 int rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name, u32 value)
201 {
202 return _rdma_nl_put_driver_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_UNSPEC,
203 value);
204 }
205 EXPORT_SYMBOL(rdma_nl_put_driver_u32);
206
207 int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name,
208 u32 value)
209 {
210 return _rdma_nl_put_driver_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
211 value);
212 }
213 EXPORT_SYMBOL(rdma_nl_put_driver_u32_hex);
214
215 int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value)
216 {
217 return _rdma_nl_put_driver_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_UNSPEC,
218 value);
219 }
220 EXPORT_SYMBOL(rdma_nl_put_driver_u64);
221
222 int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name, u64 value)
223 {
224 return _rdma_nl_put_driver_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
225 value);
226 }
227 EXPORT_SYMBOL(rdma_nl_put_driver_u64_hex);
228
229 static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
230 {
231 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
232 return -EMSGSIZE;
233 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME,
234 dev_name(&device->dev)))
235 return -EMSGSIZE;
236
237 return 0;
238 }
239
240 static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
241 {
242 char fw[IB_FW_VERSION_NAME_MAX];
243 int ret = 0;
244 u8 port;
245
246 if (fill_nldev_handle(msg, device))
247 return -EMSGSIZE;
248
249 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
250 return -EMSGSIZE;
251
252 BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64));
253 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
254 device->attrs.device_cap_flags,
255 RDMA_NLDEV_ATTR_PAD))
256 return -EMSGSIZE;
257
258 ib_get_device_fw_str(device, fw);
259 /* Device without FW has strlen(fw) = 0 */
260 if (strlen(fw) && nla_put_string(msg, RDMA_NLDEV_ATTR_FW_VERSION, fw))
261 return -EMSGSIZE;
262
263 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID,
264 be64_to_cpu(device->node_guid),
265 RDMA_NLDEV_ATTR_PAD))
266 return -EMSGSIZE;
267 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID,
268 be64_to_cpu(device->attrs.sys_image_guid),
269 RDMA_NLDEV_ATTR_PAD))
270 return -EMSGSIZE;
271 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
272 return -EMSGSIZE;
273 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, device->use_cq_dim))
274 return -EMSGSIZE;
275
276 /*
277 * Link type is determined on first port and mlx4 device
278 * which can potentially have two different link type for the same
279 * IB device is considered as better to be avoided in the future,
280 */
281 port = rdma_start_port(device);
282 if (rdma_cap_opa_mad(device, port))
283 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "opa");
284 else if (rdma_protocol_ib(device, port))
285 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "ib");
286 else if (rdma_protocol_iwarp(device, port))
287 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "iw");
288 else if (rdma_protocol_roce(device, port))
289 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL, "roce");
290 else if (rdma_protocol_usnic(device, port))
291 ret = nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_PROTOCOL,
292 "usnic");
293 return ret;
294 }
295
296 static int fill_port_info(struct sk_buff *msg,
297 struct ib_device *device, u32 port,
298 const struct net *net)
299 {
300 struct net_device *netdev = NULL;
301 struct ib_port_attr attr;
302 int ret;
303 u64 cap_flags = 0;
304
305 if (fill_nldev_handle(msg, device))
306 return -EMSGSIZE;
307
308 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
309 return -EMSGSIZE;
310
311 ret = ib_query_port(device, port, &attr);
312 if (ret)
313 return ret;
314
315 if (rdma_protocol_ib(device, port)) {
316 BUILD_BUG_ON((sizeof(attr.port_cap_flags) +
317 sizeof(attr.port_cap_flags2)) > sizeof(u64));
318 cap_flags = attr.port_cap_flags |
319 ((u64)attr.port_cap_flags2 << 32);
320 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
321 cap_flags, RDMA_NLDEV_ATTR_PAD))
322 return -EMSGSIZE;
323 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX,
324 attr.subnet_prefix, RDMA_NLDEV_ATTR_PAD))
325 return -EMSGSIZE;
326 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid))
327 return -EMSGSIZE;
328 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_SM_LID, attr.sm_lid))
329 return -EMSGSIZE;
330 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_LMC, attr.lmc))
331 return -EMSGSIZE;
332 }
333 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_STATE, attr.state))
334 return -EMSGSIZE;
335 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_PHYS_STATE, attr.phys_state))
336 return -EMSGSIZE;
337
338 netdev = ib_device_get_netdev(device, port);
339 if (netdev && net_eq(dev_net(netdev), net)) {
340 ret = nla_put_u32(msg,
341 RDMA_NLDEV_ATTR_NDEV_INDEX, netdev->ifindex);
342 if (ret)
343 goto out;
344 ret = nla_put_string(msg,
345 RDMA_NLDEV_ATTR_NDEV_NAME, netdev->name);
346 }
347
348 out:
349 if (netdev)
350 dev_put(netdev);
351 return ret;
352 }
353
354 static int fill_res_info_entry(struct sk_buff *msg,
355 const char *name, u64 curr)
356 {
357 struct nlattr *entry_attr;
358
359 entry_attr = nla_nest_start_noflag(msg,
360 RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY);
361 if (!entry_attr)
362 return -EMSGSIZE;
363
364 if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME, name))
365 goto err;
366 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr,
367 RDMA_NLDEV_ATTR_PAD))
368 goto err;
369
370 nla_nest_end(msg, entry_attr);
371 return 0;
372
373 err:
374 nla_nest_cancel(msg, entry_attr);
375 return -EMSGSIZE;
376 }
377
378 static int fill_res_info(struct sk_buff *msg, struct ib_device *device)
379 {
380 static const char * const names[RDMA_RESTRACK_MAX] = {
381 [RDMA_RESTRACK_PD] = "pd",
382 [RDMA_RESTRACK_CQ] = "cq",
383 [RDMA_RESTRACK_QP] = "qp",
384 [RDMA_RESTRACK_CM_ID] = "cm_id",
385 [RDMA_RESTRACK_MR] = "mr",
386 [RDMA_RESTRACK_CTX] = "ctx",
387 };
388
389 struct nlattr *table_attr;
390 int ret, i, curr;
391
392 if (fill_nldev_handle(msg, device))
393 return -EMSGSIZE;
394
395 table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_RES_SUMMARY);
396 if (!table_attr)
397 return -EMSGSIZE;
398
399 for (i = 0; i < RDMA_RESTRACK_MAX; i++) {
400 if (!names[i])
401 continue;
402 curr = rdma_restrack_count(device, i);
403 ret = fill_res_info_entry(msg, names[i], curr);
404 if (ret)
405 goto err;
406 }
407
408 nla_nest_end(msg, table_attr);
409 return 0;
410
411 err:
412 nla_nest_cancel(msg, table_attr);
413 return ret;
414 }
415
416 static int fill_res_name_pid(struct sk_buff *msg,
417 struct rdma_restrack_entry *res)
418 {
419 int err = 0;
420
421 /*
422 * For user resources, user is should read /proc/PID/comm to get the
423 * name of the task file.
424 */
425 if (rdma_is_kernel_res(res)) {
426 err = nla_put_string(msg, RDMA_NLDEV_ATTR_RES_KERN_NAME,
427 res->kern_name);
428 } else {
429 pid_t pid;
430
431 pid = task_pid_vnr(res->task);
432 /*
433 * Task is dead and in zombie state.
434 * There is no need to print PID anymore.
435 */
436 if (pid)
437 /*
438 * This part is racy, task can be killed and PID will
439 * be zero right here but it is ok, next query won't
440 * return PID. We don't promise real-time reflection
441 * of SW objects.
442 */
443 err = nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PID, pid);
444 }
445
446 return err ? -EMSGSIZE : 0;
447 }
448
449 static bool fill_res_entry(struct ib_device *dev, struct sk_buff *msg,
450 struct rdma_restrack_entry *res)
451 {
452 if (!dev->ops.fill_res_entry)
453 return false;
454 return dev->ops.fill_res_entry(msg, res);
455 }
456
457 static bool fill_stat_entry(struct ib_device *dev, struct sk_buff *msg,
458 struct rdma_restrack_entry *res)
459 {
460 if (!dev->ops.fill_stat_entry)
461 return false;
462 return dev->ops.fill_stat_entry(msg, res);
463 }
464
465 static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
466 struct rdma_restrack_entry *res, uint32_t port)
467 {
468 struct ib_qp *qp = container_of(res, struct ib_qp, res);
469 struct ib_device *dev = qp->device;
470 struct ib_qp_init_attr qp_init_attr;
471 struct ib_qp_attr qp_attr;
472 int ret;
473
474 ret = ib_query_qp(qp, &qp_attr, 0, &qp_init_attr);
475 if (ret)
476 return ret;
477
478 if (port && port != qp_attr.port_num)
479 return -EAGAIN;
480
481 /* In create_qp() port is not set yet */
482 if (qp_attr.port_num &&
483 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, qp_attr.port_num))
484 goto err;
485
486 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qp->qp_num))
487 goto err;
488 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC) {
489 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQPN,
490 qp_attr.dest_qp_num))
491 goto err;
492 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQ_PSN,
493 qp_attr.rq_psn))
494 goto err;
495 }
496
497 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_SQ_PSN, qp_attr.sq_psn))
498 goto err;
499
500 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC ||
501 qp->qp_type == IB_QPT_XRC_INI || qp->qp_type == IB_QPT_XRC_TGT) {
502 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE,
503 qp_attr.path_mig_state))
504 goto err;
505 }
506 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, qp->qp_type))
507 goto err;
508 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, qp_attr.qp_state))
509 goto err;
510
511 if (!rdma_is_kernel_res(res) &&
512 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, qp->pd->res.id))
513 goto err;
514
515 if (fill_res_name_pid(msg, res))
516 goto err;
517
518 if (fill_res_entry(dev, msg, res))
519 goto err;
520
521 return 0;
522
523 err: return -EMSGSIZE;
524 }
525
526 static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
527 struct rdma_restrack_entry *res, uint32_t port)
528 {
529 struct rdma_id_private *id_priv =
530 container_of(res, struct rdma_id_private, res);
531 struct ib_device *dev = id_priv->id.device;
532 struct rdma_cm_id *cm_id = &id_priv->id;
533
534 if (port && port != cm_id->port_num)
535 return 0;
536
537 if (cm_id->port_num &&
538 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num))
539 goto err;
540
541 if (id_priv->qp_num) {
542 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, id_priv->qp_num))
543 goto err;
544 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, cm_id->qp_type))
545 goto err;
546 }
547
548 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PS, cm_id->ps))
549 goto err;
550
551 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, id_priv->state))
552 goto err;
553
554 if (cm_id->route.addr.src_addr.ss_family &&
555 nla_put(msg, RDMA_NLDEV_ATTR_RES_SRC_ADDR,
556 sizeof(cm_id->route.addr.src_addr),
557 &cm_id->route.addr.src_addr))
558 goto err;
559 if (cm_id->route.addr.dst_addr.ss_family &&
560 nla_put(msg, RDMA_NLDEV_ATTR_RES_DST_ADDR,
561 sizeof(cm_id->route.addr.dst_addr),
562 &cm_id->route.addr.dst_addr))
563 goto err;
564
565 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CM_IDN, res->id))
566 goto err;
567
568 if (fill_res_name_pid(msg, res))
569 goto err;
570
571 if (fill_res_entry(dev, msg, res))
572 goto err;
573
574 return 0;
575
576 err: return -EMSGSIZE;
577 }
578
579 static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
580 struct rdma_restrack_entry *res, uint32_t port)
581 {
582 struct ib_cq *cq = container_of(res, struct ib_cq, res);
583 struct ib_device *dev = cq->device;
584
585 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))
586 goto err;
587 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
588 atomic_read(&cq->usecnt), RDMA_NLDEV_ATTR_PAD))
589 goto err;
590
591 /* Poll context is only valid for kernel CQs */
592 if (rdma_is_kernel_res(res) &&
593 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
594 goto err;
595
596 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_DIM, (cq->dim != NULL)))
597 goto err;
598
599 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN, res->id))
600 goto err;
601 if (!rdma_is_kernel_res(res) &&
602 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN,
603 cq->uobject->uevent.uobject.context->res.id))
604 goto err;
605
606 if (fill_res_name_pid(msg, res))
607 goto err;
608
609 if (fill_res_entry(dev, msg, res))
610 goto err;
611
612 return 0;
613
614 err: return -EMSGSIZE;
615 }
616
617 static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
618 struct rdma_restrack_entry *res, uint32_t port)
619 {
620 struct ib_mr *mr = container_of(res, struct ib_mr, res);
621 struct ib_device *dev = mr->pd->device;
622
623 if (has_cap_net_admin) {
624 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RKEY, mr->rkey))
625 goto err;
626 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LKEY, mr->lkey))
627 goto err;
628 }
629
630 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length,
631 RDMA_NLDEV_ATTR_PAD))
632 goto err;
633
634 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
635 goto err;
636
637 if (!rdma_is_kernel_res(res) &&
638 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, mr->pd->res.id))
639 goto err;
640
641 if (fill_res_name_pid(msg, res))
642 goto err;
643
644 if (fill_res_entry(dev, msg, res))
645 goto err;
646
647 return 0;
648
649 err: return -EMSGSIZE;
650 }
651
652 static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
653 struct rdma_restrack_entry *res, uint32_t port)
654 {
655 struct ib_pd *pd = container_of(res, struct ib_pd, res);
656 struct ib_device *dev = pd->device;
657
658 if (has_cap_net_admin) {
659 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY,
660 pd->local_dma_lkey))
661 goto err;
662 if ((pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) &&
663 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY,
664 pd->unsafe_global_rkey))
665 goto err;
666 }
667 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
668 atomic_read(&pd->usecnt), RDMA_NLDEV_ATTR_PAD))
669 goto err;
670
671 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, res->id))
672 goto err;
673
674 if (!rdma_is_kernel_res(res) &&
675 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN,
676 pd->uobject->context->res.id))
677 goto err;
678
679 if (fill_res_name_pid(msg, res))
680 goto err;
681
682 if (fill_res_entry(dev, msg, res))
683 goto err;
684
685 return 0;
686
687 err: return -EMSGSIZE;
688 }
689
690 static int fill_stat_counter_mode(struct sk_buff *msg,
691 struct rdma_counter *counter)
692 {
693 struct rdma_counter_mode *m = &counter->mode;
694
695 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_MODE, m->mode))
696 return -EMSGSIZE;
697
698 if (m->mode == RDMA_COUNTER_MODE_AUTO)
699 if ((m->mask & RDMA_COUNTER_MASK_QP_TYPE) &&
700 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, m->param.qp_type))
701 return -EMSGSIZE;
702
703 return 0;
704 }
705
706 static int fill_stat_counter_qp_entry(struct sk_buff *msg, u32 qpn)
707 {
708 struct nlattr *entry_attr;
709
710 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP_ENTRY);
711 if (!entry_attr)
712 return -EMSGSIZE;
713
714 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn))
715 goto err;
716
717 nla_nest_end(msg, entry_attr);
718 return 0;
719
720 err:
721 nla_nest_cancel(msg, entry_attr);
722 return -EMSGSIZE;
723 }
724
725 static int fill_stat_counter_qps(struct sk_buff *msg,
726 struct rdma_counter *counter)
727 {
728 struct rdma_restrack_entry *res;
729 struct rdma_restrack_root *rt;
730 struct nlattr *table_attr;
731 struct ib_qp *qp = NULL;
732 unsigned long id = 0;
733 int ret = 0;
734
735 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP);
736
737 rt = &counter->device->res[RDMA_RESTRACK_QP];
738 xa_lock(&rt->xa);
739 xa_for_each(&rt->xa, id, res) {
740 qp = container_of(res, struct ib_qp, res);
741 if (qp->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
742 continue;
743
744 if (!qp->counter || (qp->counter->id != counter->id))
745 continue;
746
747 ret = fill_stat_counter_qp_entry(msg, qp->qp_num);
748 if (ret)
749 goto err;
750 }
751
752 xa_unlock(&rt->xa);
753 nla_nest_end(msg, table_attr);
754 return 0;
755
756 err:
757 xa_unlock(&rt->xa);
758 nla_nest_cancel(msg, table_attr);
759 return ret;
760 }
761
762 int rdma_nl_stat_hwcounter_entry(struct sk_buff *msg, const char *name,
763 u64 value)
764 {
765 struct nlattr *entry_attr;
766
767 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY);
768 if (!entry_attr)
769 return -EMSGSIZE;
770
771 if (nla_put_string(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME,
772 name))
773 goto err;
774 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE,
775 value, RDMA_NLDEV_ATTR_PAD))
776 goto err;
777
778 nla_nest_end(msg, entry_attr);
779 return 0;
780
781 err:
782 nla_nest_cancel(msg, entry_attr);
783 return -EMSGSIZE;
784 }
785 EXPORT_SYMBOL(rdma_nl_stat_hwcounter_entry);
786
787 static int fill_stat_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
788 struct rdma_restrack_entry *res, uint32_t port)
789 {
790 struct ib_mr *mr = container_of(res, struct ib_mr, res);
791 struct ib_device *dev = mr->pd->device;
792
793 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
794 goto err;
795
796 if (fill_stat_entry(dev, msg, res))
797 goto err;
798
799 return 0;
800
801 err:
802 return -EMSGSIZE;
803 }
804
805 static int fill_stat_counter_hwcounters(struct sk_buff *msg,
806 struct rdma_counter *counter)
807 {
808 struct rdma_hw_stats *st = counter->stats;
809 struct nlattr *table_attr;
810 int i;
811
812 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
813 if (!table_attr)
814 return -EMSGSIZE;
815
816 for (i = 0; i < st->num_counters; i++)
817 if (rdma_nl_stat_hwcounter_entry(msg, st->names[i], st->value[i]))
818 goto err;
819
820 nla_nest_end(msg, table_attr);
821 return 0;
822
823 err:
824 nla_nest_cancel(msg, table_attr);
825 return -EMSGSIZE;
826 }
827
828 static int fill_res_counter_entry(struct sk_buff *msg, bool has_cap_net_admin,
829 struct rdma_restrack_entry *res,
830 uint32_t port)
831 {
832 struct rdma_counter *counter =
833 container_of(res, struct rdma_counter, res);
834
835 if (port && port != counter->port)
836 return -EAGAIN;
837
838 /* Dump it even query failed */
839 rdma_counter_query_stats(counter);
840
841 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, counter->port) ||
842 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, counter->id) ||
843 fill_res_name_pid(msg, &counter->res) ||
844 fill_stat_counter_mode(msg, counter) ||
845 fill_stat_counter_qps(msg, counter) ||
846 fill_stat_counter_hwcounters(msg, counter))
847 return -EMSGSIZE;
848
849 return 0;
850 }
851
852 static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
853 struct netlink_ext_ack *extack)
854 {
855 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
856 struct ib_device *device;
857 struct sk_buff *msg;
858 u32 index;
859 int err;
860
861 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
862 nldev_policy, extack);
863 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
864 return -EINVAL;
865
866 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
867
868 device = ib_device_get_by_index(sock_net(skb->sk), index);
869 if (!device)
870 return -EINVAL;
871
872 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
873 if (!msg) {
874 err = -ENOMEM;
875 goto err;
876 }
877
878 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
879 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
880 0, 0);
881
882 err = fill_dev_info(msg, device);
883 if (err)
884 goto err_free;
885
886 nlmsg_end(msg, nlh);
887
888 ib_device_put(device);
889 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
890
891 err_free:
892 nlmsg_free(msg);
893 err:
894 ib_device_put(device);
895 return err;
896 }
897
898 static int nldev_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
899 struct netlink_ext_ack *extack)
900 {
901 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
902 struct ib_device *device;
903 u32 index;
904 int err;
905
906 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
907 nldev_policy, extack);
908 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
909 return -EINVAL;
910
911 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
912 device = ib_device_get_by_index(sock_net(skb->sk), index);
913 if (!device)
914 return -EINVAL;
915
916 if (tb[RDMA_NLDEV_ATTR_DEV_NAME]) {
917 char name[IB_DEVICE_NAME_MAX] = {};
918
919 nla_strlcpy(name, tb[RDMA_NLDEV_ATTR_DEV_NAME],
920 IB_DEVICE_NAME_MAX);
921 err = ib_device_rename(device, name);
922 goto done;
923 }
924
925 if (tb[RDMA_NLDEV_NET_NS_FD]) {
926 u32 ns_fd;
927
928 ns_fd = nla_get_u32(tb[RDMA_NLDEV_NET_NS_FD]);
929 err = ib_device_set_netns_put(skb, device, ns_fd);
930 goto put_done;
931 }
932
933 if (tb[RDMA_NLDEV_ATTR_DEV_DIM]) {
934 u8 use_dim;
935
936 use_dim = nla_get_u8(tb[RDMA_NLDEV_ATTR_DEV_DIM]);
937 err = ib_device_set_dim(device, use_dim);
938 goto done;
939 }
940
941 done:
942 ib_device_put(device);
943 put_done:
944 return err;
945 }
946
947 static int _nldev_get_dumpit(struct ib_device *device,
948 struct sk_buff *skb,
949 struct netlink_callback *cb,
950 unsigned int idx)
951 {
952 int start = cb->args[0];
953 struct nlmsghdr *nlh;
954
955 if (idx < start)
956 return 0;
957
958 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
959 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
960 0, NLM_F_MULTI);
961
962 if (fill_dev_info(skb, device)) {
963 nlmsg_cancel(skb, nlh);
964 goto out;
965 }
966
967 nlmsg_end(skb, nlh);
968
969 idx++;
970
971 out: cb->args[0] = idx;
972 return skb->len;
973 }
974
975 static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
976 {
977 /*
978 * There is no need to take lock, because
979 * we are relying on ib_core's locking.
980 */
981 return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);
982 }
983
984 static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
985 struct netlink_ext_ack *extack)
986 {
987 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
988 struct ib_device *device;
989 struct sk_buff *msg;
990 u32 index;
991 u32 port;
992 int err;
993
994 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
995 nldev_policy, extack);
996 if (err ||
997 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
998 !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
999 return -EINVAL;
1000
1001 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1002 device = ib_device_get_by_index(sock_net(skb->sk), index);
1003 if (!device)
1004 return -EINVAL;
1005
1006 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1007 if (!rdma_is_port_valid(device, port)) {
1008 err = -EINVAL;
1009 goto err;
1010 }
1011
1012 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1013 if (!msg) {
1014 err = -ENOMEM;
1015 goto err;
1016 }
1017
1018 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1019 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
1020 0, 0);
1021
1022 err = fill_port_info(msg, device, port, sock_net(skb->sk));
1023 if (err)
1024 goto err_free;
1025
1026 nlmsg_end(msg, nlh);
1027 ib_device_put(device);
1028
1029 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1030
1031 err_free:
1032 nlmsg_free(msg);
1033 err:
1034 ib_device_put(device);
1035 return err;
1036 }
1037
1038 static int nldev_port_get_dumpit(struct sk_buff *skb,
1039 struct netlink_callback *cb)
1040 {
1041 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1042 struct ib_device *device;
1043 int start = cb->args[0];
1044 struct nlmsghdr *nlh;
1045 u32 idx = 0;
1046 u32 ifindex;
1047 int err;
1048 unsigned int p;
1049
1050 err = nlmsg_parse_deprecated(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1051 nldev_policy, NULL);
1052 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1053 return -EINVAL;
1054
1055 ifindex = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1056 device = ib_device_get_by_index(sock_net(skb->sk), ifindex);
1057 if (!device)
1058 return -EINVAL;
1059
1060 rdma_for_each_port (device, p) {
1061 /*
1062 * The dumpit function returns all information from specific
1063 * index. This specific index is taken from the netlink
1064 * messages request sent by user and it is available
1065 * in cb->args[0].
1066 *
1067 * Usually, the user doesn't fill this field and it causes
1068 * to return everything.
1069 *
1070 */
1071 if (idx < start) {
1072 idx++;
1073 continue;
1074 }
1075
1076 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
1077 cb->nlh->nlmsg_seq,
1078 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1079 RDMA_NLDEV_CMD_PORT_GET),
1080 0, NLM_F_MULTI);
1081
1082 if (fill_port_info(skb, device, p, sock_net(skb->sk))) {
1083 nlmsg_cancel(skb, nlh);
1084 goto out;
1085 }
1086 idx++;
1087 nlmsg_end(skb, nlh);
1088 }
1089
1090 out:
1091 ib_device_put(device);
1092 cb->args[0] = idx;
1093 return skb->len;
1094 }
1095
1096 static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1097 struct netlink_ext_ack *extack)
1098 {
1099 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1100 struct ib_device *device;
1101 struct sk_buff *msg;
1102 u32 index;
1103 int ret;
1104
1105 ret = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1106 nldev_policy, extack);
1107 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1108 return -EINVAL;
1109
1110 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1111 device = ib_device_get_by_index(sock_net(skb->sk), index);
1112 if (!device)
1113 return -EINVAL;
1114
1115 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1116 if (!msg) {
1117 ret = -ENOMEM;
1118 goto err;
1119 }
1120
1121 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1122 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
1123 0, 0);
1124
1125 ret = fill_res_info(msg, device);
1126 if (ret)
1127 goto err_free;
1128
1129 nlmsg_end(msg, nlh);
1130 ib_device_put(device);
1131 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1132
1133 err_free:
1134 nlmsg_free(msg);
1135 err:
1136 ib_device_put(device);
1137 return ret;
1138 }
1139
1140 static int _nldev_res_get_dumpit(struct ib_device *device,
1141 struct sk_buff *skb,
1142 struct netlink_callback *cb,
1143 unsigned int idx)
1144 {
1145 int start = cb->args[0];
1146 struct nlmsghdr *nlh;
1147
1148 if (idx < start)
1149 return 0;
1150
1151 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1152 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
1153 0, NLM_F_MULTI);
1154
1155 if (fill_res_info(skb, device)) {
1156 nlmsg_cancel(skb, nlh);
1157 goto out;
1158 }
1159 nlmsg_end(skb, nlh);
1160
1161 idx++;
1162
1163 out:
1164 cb->args[0] = idx;
1165 return skb->len;
1166 }
1167
1168 static int nldev_res_get_dumpit(struct sk_buff *skb,
1169 struct netlink_callback *cb)
1170 {
1171 return ib_enum_all_devs(_nldev_res_get_dumpit, skb, cb);
1172 }
1173
1174 struct nldev_fill_res_entry {
1175 enum rdma_nldev_attr nldev_attr;
1176 enum rdma_nldev_command nldev_cmd;
1177 u8 flags;
1178 u32 entry;
1179 u32 id;
1180 };
1181
1182 enum nldev_res_flags {
1183 NLDEV_PER_DEV = 1 << 0,
1184 };
1185
1186 static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
1187 [RDMA_RESTRACK_QP] = {
1188 .nldev_cmd = RDMA_NLDEV_CMD_RES_QP_GET,
1189 .nldev_attr = RDMA_NLDEV_ATTR_RES_QP,
1190 .entry = RDMA_NLDEV_ATTR_RES_QP_ENTRY,
1191 .id = RDMA_NLDEV_ATTR_RES_LQPN,
1192 },
1193 [RDMA_RESTRACK_CM_ID] = {
1194 .nldev_cmd = RDMA_NLDEV_CMD_RES_CM_ID_GET,
1195 .nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
1196 .entry = RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY,
1197 .id = RDMA_NLDEV_ATTR_RES_CM_IDN,
1198 },
1199 [RDMA_RESTRACK_CQ] = {
1200 .nldev_cmd = RDMA_NLDEV_CMD_RES_CQ_GET,
1201 .nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
1202 .flags = NLDEV_PER_DEV,
1203 .entry = RDMA_NLDEV_ATTR_RES_CQ_ENTRY,
1204 .id = RDMA_NLDEV_ATTR_RES_CQN,
1205 },
1206 [RDMA_RESTRACK_MR] = {
1207 .nldev_cmd = RDMA_NLDEV_CMD_RES_MR_GET,
1208 .nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
1209 .flags = NLDEV_PER_DEV,
1210 .entry = RDMA_NLDEV_ATTR_RES_MR_ENTRY,
1211 .id = RDMA_NLDEV_ATTR_RES_MRN,
1212 },
1213 [RDMA_RESTRACK_PD] = {
1214 .nldev_cmd = RDMA_NLDEV_CMD_RES_PD_GET,
1215 .nldev_attr = RDMA_NLDEV_ATTR_RES_PD,
1216 .flags = NLDEV_PER_DEV,
1217 .entry = RDMA_NLDEV_ATTR_RES_PD_ENTRY,
1218 .id = RDMA_NLDEV_ATTR_RES_PDN,
1219 },
1220 [RDMA_RESTRACK_COUNTER] = {
1221 .nldev_cmd = RDMA_NLDEV_CMD_STAT_GET,
1222 .nldev_attr = RDMA_NLDEV_ATTR_STAT_COUNTER,
1223 .entry = RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY,
1224 .id = RDMA_NLDEV_ATTR_STAT_COUNTER_ID,
1225 },
1226 };
1227
1228 static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1229 struct netlink_ext_ack *extack,
1230 enum rdma_restrack_type res_type,
1231 res_fill_func_t fill_func)
1232 {
1233 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
1234 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1235 struct rdma_restrack_entry *res;
1236 struct ib_device *device;
1237 u32 index, id, port = 0;
1238 bool has_cap_net_admin;
1239 struct sk_buff *msg;
1240 int ret;
1241
1242 ret = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1243 nldev_policy, extack);
1244 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !fe->id || !tb[fe->id])
1245 return -EINVAL;
1246
1247 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1248 device = ib_device_get_by_index(sock_net(skb->sk), index);
1249 if (!device)
1250 return -EINVAL;
1251
1252 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1253 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1254 if (!rdma_is_port_valid(device, port)) {
1255 ret = -EINVAL;
1256 goto err;
1257 }
1258 }
1259
1260 if ((port && fe->flags & NLDEV_PER_DEV) ||
1261 (!port && ~fe->flags & NLDEV_PER_DEV)) {
1262 ret = -EINVAL;
1263 goto err;
1264 }
1265
1266 id = nla_get_u32(tb[fe->id]);
1267 res = rdma_restrack_get_byid(device, res_type, id);
1268 if (IS_ERR(res)) {
1269 ret = PTR_ERR(res);
1270 goto err;
1271 }
1272
1273 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1274 if (!msg) {
1275 ret = -ENOMEM;
1276 goto err_get;
1277 }
1278
1279 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1280 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, fe->nldev_cmd),
1281 0, 0);
1282
1283 if (fill_nldev_handle(msg, device)) {
1284 ret = -EMSGSIZE;
1285 goto err_free;
1286 }
1287
1288 has_cap_net_admin = netlink_capable(skb, CAP_NET_ADMIN);
1289
1290 ret = fill_func(msg, has_cap_net_admin, res, port);
1291
1292 rdma_restrack_put(res);
1293 if (ret)
1294 goto err_free;
1295
1296 nlmsg_end(msg, nlh);
1297 ib_device_put(device);
1298 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1299
1300 err_free:
1301 nlmsg_free(msg);
1302 err_get:
1303 rdma_restrack_put(res);
1304 err:
1305 ib_device_put(device);
1306 return ret;
1307 }
1308
1309 static int res_get_common_dumpit(struct sk_buff *skb,
1310 struct netlink_callback *cb,
1311 enum rdma_restrack_type res_type,
1312 res_fill_func_t fill_func)
1313 {
1314 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
1315 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1316 struct rdma_restrack_entry *res;
1317 struct rdma_restrack_root *rt;
1318 int err, ret = 0, idx = 0;
1319 struct nlattr *table_attr;
1320 struct nlattr *entry_attr;
1321 struct ib_device *device;
1322 int start = cb->args[0];
1323 bool has_cap_net_admin;
1324 struct nlmsghdr *nlh;
1325 unsigned long id;
1326 u32 index, port = 0;
1327 bool filled = false;
1328
1329 err = nlmsg_parse_deprecated(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1330 nldev_policy, NULL);
1331 /*
1332 * Right now, we are expecting the device index to get res information,
1333 * but it is possible to extend this code to return all devices in
1334 * one shot by checking the existence of RDMA_NLDEV_ATTR_DEV_INDEX.
1335 * if it doesn't exist, we will iterate over all devices.
1336 *
1337 * But it is not needed for now.
1338 */
1339 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1340 return -EINVAL;
1341
1342 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1343 device = ib_device_get_by_index(sock_net(skb->sk), index);
1344 if (!device)
1345 return -EINVAL;
1346
1347 /*
1348 * If no PORT_INDEX is supplied, we will return all QPs from that device
1349 */
1350 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1351 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1352 if (!rdma_is_port_valid(device, port)) {
1353 ret = -EINVAL;
1354 goto err_index;
1355 }
1356 }
1357
1358 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1359 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, fe->nldev_cmd),
1360 0, NLM_F_MULTI);
1361
1362 if (fill_nldev_handle(skb, device)) {
1363 ret = -EMSGSIZE;
1364 goto err;
1365 }
1366
1367 table_attr = nla_nest_start_noflag(skb, fe->nldev_attr);
1368 if (!table_attr) {
1369 ret = -EMSGSIZE;
1370 goto err;
1371 }
1372
1373 has_cap_net_admin = netlink_capable(cb->skb, CAP_NET_ADMIN);
1374
1375 rt = &device->res[res_type];
1376 xa_lock(&rt->xa);
1377 /*
1378 * FIXME: if the skip ahead is something common this loop should
1379 * use xas_for_each & xas_pause to optimize, we can have a lot of
1380 * objects.
1381 */
1382 xa_for_each(&rt->xa, id, res) {
1383 if (idx < start || !rdma_restrack_get(res))
1384 goto next;
1385
1386 xa_unlock(&rt->xa);
1387
1388 filled = true;
1389
1390 entry_attr = nla_nest_start_noflag(skb, fe->entry);
1391 if (!entry_attr) {
1392 ret = -EMSGSIZE;
1393 rdma_restrack_put(res);
1394 goto msg_full;
1395 }
1396
1397 ret = fill_func(skb, has_cap_net_admin, res, port);
1398
1399 rdma_restrack_put(res);
1400
1401 if (ret) {
1402 nla_nest_cancel(skb, entry_attr);
1403 if (ret == -EMSGSIZE)
1404 goto msg_full;
1405 if (ret == -EAGAIN)
1406 goto again;
1407 goto res_err;
1408 }
1409 nla_nest_end(skb, entry_attr);
1410 again: xa_lock(&rt->xa);
1411 next: idx++;
1412 }
1413 xa_unlock(&rt->xa);
1414
1415 msg_full:
1416 nla_nest_end(skb, table_attr);
1417 nlmsg_end(skb, nlh);
1418 cb->args[0] = idx;
1419
1420 /*
1421 * No more entries to fill, cancel the message and
1422 * return 0 to mark end of dumpit.
1423 */
1424 if (!filled)
1425 goto err;
1426
1427 ib_device_put(device);
1428 return skb->len;
1429
1430 res_err:
1431 nla_nest_cancel(skb, table_attr);
1432
1433 err:
1434 nlmsg_cancel(skb, nlh);
1435
1436 err_index:
1437 ib_device_put(device);
1438 return ret;
1439 }
1440
1441 #define RES_GET_FUNCS(name, type) \
1442 static int nldev_res_get_##name##_dumpit(struct sk_buff *skb, \
1443 struct netlink_callback *cb) \
1444 { \
1445 return res_get_common_dumpit(skb, cb, type, \
1446 fill_res_##name##_entry); \
1447 } \
1448 static int nldev_res_get_##name##_doit(struct sk_buff *skb, \
1449 struct nlmsghdr *nlh, \
1450 struct netlink_ext_ack *extack) \
1451 { \
1452 return res_get_common_doit(skb, nlh, extack, type, \
1453 fill_res_##name##_entry); \
1454 }
1455
1456 RES_GET_FUNCS(qp, RDMA_RESTRACK_QP);
1457 RES_GET_FUNCS(cm_id, RDMA_RESTRACK_CM_ID);
1458 RES_GET_FUNCS(cq, RDMA_RESTRACK_CQ);
1459 RES_GET_FUNCS(pd, RDMA_RESTRACK_PD);
1460 RES_GET_FUNCS(mr, RDMA_RESTRACK_MR);
1461 RES_GET_FUNCS(counter, RDMA_RESTRACK_COUNTER);
1462
1463 static LIST_HEAD(link_ops);
1464 static DECLARE_RWSEM(link_ops_rwsem);
1465
1466 static const struct rdma_link_ops *link_ops_get(const char *type)
1467 {
1468 const struct rdma_link_ops *ops;
1469
1470 list_for_each_entry(ops, &link_ops, list) {
1471 if (!strcmp(ops->type, type))
1472 goto out;
1473 }
1474 ops = NULL;
1475 out:
1476 return ops;
1477 }
1478
1479 void rdma_link_register(struct rdma_link_ops *ops)
1480 {
1481 down_write(&link_ops_rwsem);
1482 if (WARN_ON_ONCE(link_ops_get(ops->type)))
1483 goto out;
1484 list_add(&ops->list, &link_ops);
1485 out:
1486 up_write(&link_ops_rwsem);
1487 }
1488 EXPORT_SYMBOL(rdma_link_register);
1489
1490 void rdma_link_unregister(struct rdma_link_ops *ops)
1491 {
1492 down_write(&link_ops_rwsem);
1493 list_del(&ops->list);
1494 up_write(&link_ops_rwsem);
1495 }
1496 EXPORT_SYMBOL(rdma_link_unregister);
1497
1498 static int nldev_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
1499 struct netlink_ext_ack *extack)
1500 {
1501 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1502 char ibdev_name[IB_DEVICE_NAME_MAX];
1503 const struct rdma_link_ops *ops;
1504 char ndev_name[IFNAMSIZ];
1505 struct net_device *ndev;
1506 char type[IFNAMSIZ];
1507 int err;
1508
1509 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1510 nldev_policy, extack);
1511 if (err || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
1512 !tb[RDMA_NLDEV_ATTR_LINK_TYPE] || !tb[RDMA_NLDEV_ATTR_NDEV_NAME])
1513 return -EINVAL;
1514
1515 nla_strlcpy(ibdev_name, tb[RDMA_NLDEV_ATTR_DEV_NAME],
1516 sizeof(ibdev_name));
1517 if (strchr(ibdev_name, '%'))
1518 return -EINVAL;
1519
1520 nla_strlcpy(type, tb[RDMA_NLDEV_ATTR_LINK_TYPE], sizeof(type));
1521 nla_strlcpy(ndev_name, tb[RDMA_NLDEV_ATTR_NDEV_NAME],
1522 sizeof(ndev_name));
1523
1524 ndev = dev_get_by_name(sock_net(skb->sk), ndev_name);
1525 if (!ndev)
1526 return -ENODEV;
1527
1528 down_read(&link_ops_rwsem);
1529 ops = link_ops_get(type);
1530 #ifdef CONFIG_MODULES
1531 if (!ops) {
1532 up_read(&link_ops_rwsem);
1533 request_module("rdma-link-%s", type);
1534 down_read(&link_ops_rwsem);
1535 ops = link_ops_get(type);
1536 }
1537 #endif
1538 err = ops ? ops->newlink(ibdev_name, ndev) : -EINVAL;
1539 up_read(&link_ops_rwsem);
1540 dev_put(ndev);
1541
1542 return err;
1543 }
1544
1545 static int nldev_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
1546 struct netlink_ext_ack *extack)
1547 {
1548 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1549 struct ib_device *device;
1550 u32 index;
1551 int err;
1552
1553 err = nlmsg_parse_deprecated(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1554 nldev_policy, extack);
1555 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
1556 return -EINVAL;
1557
1558 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1559 device = ib_device_get_by_index(sock_net(skb->sk), index);
1560 if (!device)
1561 return -EINVAL;
1562
1563 if (!(device->attrs.device_cap_flags & IB_DEVICE_ALLOW_USER_UNREG)) {
1564 ib_device_put(device);
1565 return -EINVAL;
1566 }
1567
1568 ib_unregister_device_and_put(device);
1569 return 0;
1570 }
1571
1572 static int nldev_get_chardev(struct sk_buff *skb, struct nlmsghdr *nlh,
1573 struct netlink_ext_ack *extack)
1574 {
1575 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1576 char client_name[RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE];
1577 struct ib_client_nl_info data = {};
1578 struct ib_device *ibdev = NULL;
1579 struct sk_buff *msg;
1580 u32 index;
1581 int err;
1582
1583 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, nldev_policy,
1584 extack);
1585 if (err || !tb[RDMA_NLDEV_ATTR_CHARDEV_TYPE])
1586 return -EINVAL;
1587
1588 nla_strlcpy(client_name, tb[RDMA_NLDEV_ATTR_CHARDEV_TYPE],
1589 sizeof(client_name));
1590
1591 if (tb[RDMA_NLDEV_ATTR_DEV_INDEX]) {
1592 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1593 ibdev = ib_device_get_by_index(sock_net(skb->sk), index);
1594 if (!ibdev)
1595 return -EINVAL;
1596
1597 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1598 data.port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1599 if (!rdma_is_port_valid(ibdev, data.port)) {
1600 err = -EINVAL;
1601 goto out_put;
1602 }
1603 } else {
1604 data.port = -1;
1605 }
1606 } else if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
1607 return -EINVAL;
1608 }
1609
1610 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1611 if (!msg) {
1612 err = -ENOMEM;
1613 goto out_put;
1614 }
1615 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1616 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1617 RDMA_NLDEV_CMD_GET_CHARDEV),
1618 0, 0);
1619
1620 data.nl_msg = msg;
1621 err = ib_get_client_nl_info(ibdev, client_name, &data);
1622 if (err)
1623 goto out_nlmsg;
1624
1625 err = nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CHARDEV,
1626 huge_encode_dev(data.cdev->devt),
1627 RDMA_NLDEV_ATTR_PAD);
1628 if (err)
1629 goto out_data;
1630 err = nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CHARDEV_ABI, data.abi,
1631 RDMA_NLDEV_ATTR_PAD);
1632 if (err)
1633 goto out_data;
1634 if (nla_put_string(msg, RDMA_NLDEV_ATTR_CHARDEV_NAME,
1635 dev_name(data.cdev))) {
1636 err = -EMSGSIZE;
1637 goto out_data;
1638 }
1639
1640 nlmsg_end(msg, nlh);
1641 put_device(data.cdev);
1642 if (ibdev)
1643 ib_device_put(ibdev);
1644 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1645
1646 out_data:
1647 put_device(data.cdev);
1648 out_nlmsg:
1649 nlmsg_free(msg);
1650 out_put:
1651 if (ibdev)
1652 ib_device_put(ibdev);
1653 return err;
1654 }
1655
1656 static int nldev_sys_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1657 struct netlink_ext_ack *extack)
1658 {
1659 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1660 struct sk_buff *msg;
1661 int err;
1662
1663 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1664 nldev_policy, extack);
1665 if (err)
1666 return err;
1667
1668 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1669 if (!msg)
1670 return -ENOMEM;
1671
1672 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1673 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1674 RDMA_NLDEV_CMD_SYS_GET),
1675 0, 0);
1676
1677 err = nla_put_u8(msg, RDMA_NLDEV_SYS_ATTR_NETNS_MODE,
1678 (u8)ib_devices_shared_netns);
1679 if (err) {
1680 nlmsg_free(msg);
1681 return err;
1682 }
1683 nlmsg_end(msg, nlh);
1684 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1685 }
1686
1687 static int nldev_set_sys_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1688 struct netlink_ext_ack *extack)
1689 {
1690 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1691 u8 enable;
1692 int err;
1693
1694 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1695 nldev_policy, extack);
1696 if (err || !tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE])
1697 return -EINVAL;
1698
1699 enable = nla_get_u8(tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]);
1700 /* Only 0 and 1 are supported */
1701 if (enable > 1)
1702 return -EINVAL;
1703
1704 err = rdma_compatdev_set(enable);
1705 return err;
1706 }
1707
1708 static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1709 struct netlink_ext_ack *extack)
1710 {
1711 u32 index, port, mode, mask = 0, qpn, cntn = 0;
1712 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1713 struct ib_device *device;
1714 struct sk_buff *msg;
1715 int ret;
1716
1717 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1718 nldev_policy, extack);
1719 /* Currently only counter for QP is supported */
1720 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES] ||
1721 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
1722 !tb[RDMA_NLDEV_ATTR_PORT_INDEX] || !tb[RDMA_NLDEV_ATTR_STAT_MODE])
1723 return -EINVAL;
1724
1725 if (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
1726 return -EINVAL;
1727
1728 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1729 device = ib_device_get_by_index(sock_net(skb->sk), index);
1730 if (!device)
1731 return -EINVAL;
1732
1733 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1734 if (!rdma_is_port_valid(device, port)) {
1735 ret = -EINVAL;
1736 goto err;
1737 }
1738
1739 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1740 if (!msg) {
1741 ret = -ENOMEM;
1742 goto err;
1743 }
1744 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1745 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1746 RDMA_NLDEV_CMD_STAT_SET),
1747 0, 0);
1748
1749 mode = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_MODE]);
1750 if (mode == RDMA_COUNTER_MODE_AUTO) {
1751 if (tb[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK])
1752 mask = nla_get_u32(
1753 tb[RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK]);
1754
1755 ret = rdma_counter_set_auto_mode(device, port,
1756 mask ? true : false, mask);
1757 if (ret)
1758 goto err_msg;
1759 } else {
1760 qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]);
1761 if (tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]) {
1762 cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]);
1763 ret = rdma_counter_bind_qpn(device, port, qpn, cntn);
1764 } else {
1765 ret = rdma_counter_bind_qpn_alloc(device, port,
1766 qpn, &cntn);
1767 }
1768 if (ret)
1769 goto err_msg;
1770
1771 if (fill_nldev_handle(msg, device) ||
1772 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
1773 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, cntn) ||
1774 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn)) {
1775 ret = -EMSGSIZE;
1776 goto err_fill;
1777 }
1778 }
1779
1780 nlmsg_end(msg, nlh);
1781 ib_device_put(device);
1782 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1783
1784 err_fill:
1785 rdma_counter_unbind_qpn(device, port, qpn, cntn);
1786 err_msg:
1787 nlmsg_free(msg);
1788 err:
1789 ib_device_put(device);
1790 return ret;
1791 }
1792
1793 static int nldev_stat_del_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1794 struct netlink_ext_ack *extack)
1795 {
1796 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
1797 struct ib_device *device;
1798 struct sk_buff *msg;
1799 u32 index, port, qpn, cntn;
1800 int ret;
1801
1802 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
1803 nldev_policy, extack);
1804 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES] ||
1805 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX] ||
1806 !tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID] ||
1807 !tb[RDMA_NLDEV_ATTR_RES_LQPN])
1808 return -EINVAL;
1809
1810 if (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
1811 return -EINVAL;
1812
1813 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1814 device = ib_device_get_by_index(sock_net(skb->sk), index);
1815 if (!device)
1816 return -EINVAL;
1817
1818 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1819 if (!rdma_is_port_valid(device, port)) {
1820 ret = -EINVAL;
1821 goto err;
1822 }
1823
1824 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1825 if (!msg) {
1826 ret = -ENOMEM;
1827 goto err;
1828 }
1829 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1830 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1831 RDMA_NLDEV_CMD_STAT_SET),
1832 0, 0);
1833
1834 cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]);
1835 qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]);
1836 if (fill_nldev_handle(msg, device) ||
1837 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
1838 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_COUNTER_ID, cntn) ||
1839 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qpn)) {
1840 ret = -EMSGSIZE;
1841 goto err_fill;
1842 }
1843
1844 ret = rdma_counter_unbind_qpn(device, port, qpn, cntn);
1845 if (ret)
1846 goto err_fill;
1847
1848 nlmsg_end(msg, nlh);
1849 ib_device_put(device);
1850 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1851
1852 err_fill:
1853 nlmsg_free(msg);
1854 err:
1855 ib_device_put(device);
1856 return ret;
1857 }
1858
1859 static int stat_get_doit_default_counter(struct sk_buff *skb,
1860 struct nlmsghdr *nlh,
1861 struct netlink_ext_ack *extack,
1862 struct nlattr *tb[])
1863 {
1864 struct rdma_hw_stats *stats;
1865 struct nlattr *table_attr;
1866 struct ib_device *device;
1867 int ret, num_cnts, i;
1868 struct sk_buff *msg;
1869 u32 index, port;
1870 u64 v;
1871
1872 if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
1873 return -EINVAL;
1874
1875 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1876 device = ib_device_get_by_index(sock_net(skb->sk), index);
1877 if (!device)
1878 return -EINVAL;
1879
1880 if (!device->ops.alloc_hw_stats || !device->ops.get_hw_stats) {
1881 ret = -EINVAL;
1882 goto err;
1883 }
1884
1885 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1886 if (!rdma_is_port_valid(device, port)) {
1887 ret = -EINVAL;
1888 goto err;
1889 }
1890
1891 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1892 if (!msg) {
1893 ret = -ENOMEM;
1894 goto err;
1895 }
1896
1897 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1898 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1899 RDMA_NLDEV_CMD_STAT_GET),
1900 0, 0);
1901
1902 if (fill_nldev_handle(msg, device) ||
1903 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) {
1904 ret = -EMSGSIZE;
1905 goto err_msg;
1906 }
1907
1908 stats = device->port_data ? device->port_data[port].hw_stats : NULL;
1909 if (stats == NULL) {
1910 ret = -EINVAL;
1911 goto err_msg;
1912 }
1913 mutex_lock(&stats->lock);
1914
1915 num_cnts = device->ops.get_hw_stats(device, stats, port, 0);
1916 if (num_cnts < 0) {
1917 ret = -EINVAL;
1918 goto err_stats;
1919 }
1920
1921 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_STAT_HWCOUNTERS);
1922 if (!table_attr) {
1923 ret = -EMSGSIZE;
1924 goto err_stats;
1925 }
1926 for (i = 0; i < num_cnts; i++) {
1927 v = stats->value[i] +
1928 rdma_counter_get_hwstat_value(device, port, i);
1929 if (rdma_nl_stat_hwcounter_entry(msg, stats->names[i], v)) {
1930 ret = -EMSGSIZE;
1931 goto err_table;
1932 }
1933 }
1934 nla_nest_end(msg, table_attr);
1935
1936 mutex_unlock(&stats->lock);
1937 nlmsg_end(msg, nlh);
1938 ib_device_put(device);
1939 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
1940
1941 err_table:
1942 nla_nest_cancel(msg, table_attr);
1943 err_stats:
1944 mutex_unlock(&stats->lock);
1945 err_msg:
1946 nlmsg_free(msg);
1947 err:
1948 ib_device_put(device);
1949 return ret;
1950 }
1951
1952 static int stat_get_doit_qp(struct sk_buff *skb, struct nlmsghdr *nlh,
1953 struct netlink_ext_ack *extack, struct nlattr *tb[])
1954
1955 {
1956 static enum rdma_nl_counter_mode mode;
1957 static enum rdma_nl_counter_mask mask;
1958 struct ib_device *device;
1959 struct sk_buff *msg;
1960 u32 index, port;
1961 int ret;
1962
1963 if (tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID])
1964 return nldev_res_get_counter_doit(skb, nlh, extack);
1965
1966 if (!tb[RDMA_NLDEV_ATTR_STAT_MODE] ||
1967 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
1968 return -EINVAL;
1969
1970 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
1971 device = ib_device_get_by_index(sock_net(skb->sk), index);
1972 if (!device)
1973 return -EINVAL;
1974
1975 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
1976 if (!rdma_is_port_valid(device, port)) {
1977 ret = -EINVAL;
1978 goto err;
1979 }
1980
1981 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1982 if (!msg) {
1983 ret = -ENOMEM;
1984 goto err;
1985 }
1986
1987 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
1988 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
1989 RDMA_NLDEV_CMD_STAT_GET),
1990 0, 0);
1991
1992 ret = rdma_counter_get_mode(device, port, &mode, &mask);
1993 if (ret)
1994 goto err_msg;
1995
1996 if (fill_nldev_handle(msg, device) ||
1997 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port) ||
1998 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_MODE, mode)) {
1999 ret = -EMSGSIZE;
2000 goto err_msg;
2001 }
2002
2003 if ((mode == RDMA_COUNTER_MODE_AUTO) &&
2004 nla_put_u32(msg, RDMA_NLDEV_ATTR_STAT_AUTO_MODE_MASK, mask)) {
2005 ret = -EMSGSIZE;
2006 goto err_msg;
2007 }
2008
2009 nlmsg_end(msg, nlh);
2010 ib_device_put(device);
2011 return rdma_nl_unicast(sock_net(skb->sk), msg, NETLINK_CB(skb).portid);
2012
2013 err_msg:
2014 nlmsg_free(msg);
2015 err:
2016 ib_device_put(device);
2017 return ret;
2018 }
2019
2020 static int nldev_stat_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
2021 struct netlink_ext_ack *extack)
2022 {
2023 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2024 int ret;
2025
2026 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2027 nldev_policy, extack);
2028 if (ret)
2029 return -EINVAL;
2030
2031 if (!tb[RDMA_NLDEV_ATTR_STAT_RES])
2032 return stat_get_doit_default_counter(skb, nlh, extack, tb);
2033
2034 switch (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES])) {
2035 case RDMA_NLDEV_ATTR_RES_QP:
2036 ret = stat_get_doit_qp(skb, nlh, extack, tb);
2037 break;
2038 case RDMA_NLDEV_ATTR_RES_MR:
2039 ret = res_get_common_doit(skb, nlh, extack, RDMA_RESTRACK_MR,
2040 fill_stat_mr_entry);
2041 break;
2042 default:
2043 ret = -EINVAL;
2044 break;
2045 }
2046
2047 return ret;
2048 }
2049
2050 static int nldev_stat_get_dumpit(struct sk_buff *skb,
2051 struct netlink_callback *cb)
2052 {
2053 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
2054 int ret;
2055
2056 ret = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
2057 nldev_policy, NULL);
2058 if (ret || !tb[RDMA_NLDEV_ATTR_STAT_RES])
2059 return -EINVAL;
2060
2061 switch (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES])) {
2062 case RDMA_NLDEV_ATTR_RES_QP:
2063 ret = nldev_res_get_counter_dumpit(skb, cb);
2064 break;
2065 case RDMA_NLDEV_ATTR_RES_MR:
2066 ret = res_get_common_dumpit(skb, cb, RDMA_RESTRACK_MR,
2067 fill_stat_mr_entry);
2068 break;
2069 default:
2070 ret = -EINVAL;
2071 break;
2072 }
2073
2074 return ret;
2075 }
2076
2077 static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
2078 [RDMA_NLDEV_CMD_GET] = {
2079 .doit = nldev_get_doit,
2080 .dump = nldev_get_dumpit,
2081 },
2082 [RDMA_NLDEV_CMD_GET_CHARDEV] = {
2083 .doit = nldev_get_chardev,
2084 },
2085 [RDMA_NLDEV_CMD_SET] = {
2086 .doit = nldev_set_doit,
2087 .flags = RDMA_NL_ADMIN_PERM,
2088 },
2089 [RDMA_NLDEV_CMD_NEWLINK] = {
2090 .doit = nldev_newlink,
2091 .flags = RDMA_NL_ADMIN_PERM,
2092 },
2093 [RDMA_NLDEV_CMD_DELLINK] = {
2094 .doit = nldev_dellink,
2095 .flags = RDMA_NL_ADMIN_PERM,
2096 },
2097 [RDMA_NLDEV_CMD_PORT_GET] = {
2098 .doit = nldev_port_get_doit,
2099 .dump = nldev_port_get_dumpit,
2100 },
2101 [RDMA_NLDEV_CMD_RES_GET] = {
2102 .doit = nldev_res_get_doit,
2103 .dump = nldev_res_get_dumpit,
2104 },
2105 [RDMA_NLDEV_CMD_RES_QP_GET] = {
2106 .doit = nldev_res_get_qp_doit,
2107 .dump = nldev_res_get_qp_dumpit,
2108 },
2109 [RDMA_NLDEV_CMD_RES_CM_ID_GET] = {
2110 .doit = nldev_res_get_cm_id_doit,
2111 .dump = nldev_res_get_cm_id_dumpit,
2112 },
2113 [RDMA_NLDEV_CMD_RES_CQ_GET] = {
2114 .doit = nldev_res_get_cq_doit,
2115 .dump = nldev_res_get_cq_dumpit,
2116 },
2117 [RDMA_NLDEV_CMD_RES_MR_GET] = {
2118 .doit = nldev_res_get_mr_doit,
2119 .dump = nldev_res_get_mr_dumpit,
2120 },
2121 [RDMA_NLDEV_CMD_RES_PD_GET] = {
2122 .doit = nldev_res_get_pd_doit,
2123 .dump = nldev_res_get_pd_dumpit,
2124 },
2125 [RDMA_NLDEV_CMD_SYS_GET] = {
2126 .doit = nldev_sys_get_doit,
2127 },
2128 [RDMA_NLDEV_CMD_SYS_SET] = {
2129 .doit = nldev_set_sys_set_doit,
2130 },
2131 [RDMA_NLDEV_CMD_STAT_SET] = {
2132 .doit = nldev_stat_set_doit,
2133 .flags = RDMA_NL_ADMIN_PERM,
2134 },
2135 [RDMA_NLDEV_CMD_STAT_GET] = {
2136 .doit = nldev_stat_get_doit,
2137 .dump = nldev_stat_get_dumpit,
2138 },
2139 [RDMA_NLDEV_CMD_STAT_DEL] = {
2140 .doit = nldev_stat_del_doit,
2141 .flags = RDMA_NL_ADMIN_PERM,
2142 },
2143 };
2144
2145 void __init nldev_init(void)
2146 {
2147 rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
2148 }
2149
2150 void __exit nldev_exit(void)
2151 {
2152 rdma_nl_unregister(RDMA_NL_NLDEV);
2153 }
2154
2155 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);
Linux with added FPC-III support