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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 <net/netlink.h>
37#include <rdma/rdma_cm.h>
38#include <rdma/rdma_netlink.h>
39
40#include "core_priv.h"
41#include "cma_priv.h"
42
43static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
44 [RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
45 [RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
46 .len = IB_DEVICE_NAME_MAX - 1},
47 [RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 },
48 [RDMA_NLDEV_ATTR_FW_VERSION] = { .type = NLA_NUL_STRING,
49 .len = IB_FW_VERSION_NAME_MAX - 1},
50 [RDMA_NLDEV_ATTR_NODE_GUID] = { .type = NLA_U64 },
51 [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 },
52 [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 },
53 [RDMA_NLDEV_ATTR_LID] = { .type = NLA_U32 },
54 [RDMA_NLDEV_ATTR_SM_LID] = { .type = NLA_U32 },
55 [RDMA_NLDEV_ATTR_LMC] = { .type = NLA_U8 },
56 [RDMA_NLDEV_ATTR_PORT_STATE] = { .type = NLA_U8 },
57 [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = { .type = NLA_U8 },
58 [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = { .type = NLA_U8 },
59 [RDMA_NLDEV_ATTR_RES_SUMMARY] = { .type = NLA_NESTED },
60 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY] = { .type = NLA_NESTED },
61 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME] = { .type = NLA_NUL_STRING,
62 .len = 16 },
63 [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR] = { .type = NLA_U64 },
64 [RDMA_NLDEV_ATTR_RES_QP] = { .type = NLA_NESTED },
65 [RDMA_NLDEV_ATTR_RES_QP_ENTRY] = { .type = NLA_NESTED },
66 [RDMA_NLDEV_ATTR_RES_LQPN] = { .type = NLA_U32 },
67 [RDMA_NLDEV_ATTR_RES_RQPN] = { .type = NLA_U32 },
68 [RDMA_NLDEV_ATTR_RES_RQ_PSN] = { .type = NLA_U32 },
69 [RDMA_NLDEV_ATTR_RES_SQ_PSN] = { .type = NLA_U32 },
70 [RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE] = { .type = NLA_U8 },
71 [RDMA_NLDEV_ATTR_RES_TYPE] = { .type = NLA_U8 },
72 [RDMA_NLDEV_ATTR_RES_STATE] = { .type = NLA_U8 },
73 [RDMA_NLDEV_ATTR_RES_PID] = { .type = NLA_U32 },
74 [RDMA_NLDEV_ATTR_RES_KERN_NAME] = { .type = NLA_NUL_STRING,
75 .len = TASK_COMM_LEN },
76 [RDMA_NLDEV_ATTR_RES_CM_ID] = { .type = NLA_NESTED },
77 [RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY] = { .type = NLA_NESTED },
78 [RDMA_NLDEV_ATTR_RES_PS] = { .type = NLA_U32 },
79 [RDMA_NLDEV_ATTR_RES_SRC_ADDR] = {
80 .len = sizeof(struct __kernel_sockaddr_storage) },
81 [RDMA_NLDEV_ATTR_RES_DST_ADDR] = {
82 .len = sizeof(struct __kernel_sockaddr_storage) },
83 [RDMA_NLDEV_ATTR_RES_CQ] = { .type = NLA_NESTED },
84 [RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = { .type = NLA_NESTED },
85 [RDMA_NLDEV_ATTR_RES_CQE] = { .type = NLA_U32 },
86 [RDMA_NLDEV_ATTR_RES_USECNT] = { .type = NLA_U64 },
87 [RDMA_NLDEV_ATTR_RES_POLL_CTX] = { .type = NLA_U8 },
88 [RDMA_NLDEV_ATTR_RES_MR] = { .type = NLA_NESTED },
89 [RDMA_NLDEV_ATTR_RES_MR_ENTRY] = { .type = NLA_NESTED },
90 [RDMA_NLDEV_ATTR_RES_RKEY] = { .type = NLA_U32 },
91 [RDMA_NLDEV_ATTR_RES_LKEY] = { .type = NLA_U32 },
92 [RDMA_NLDEV_ATTR_RES_IOVA] = { .type = NLA_U64 },
93 [RDMA_NLDEV_ATTR_RES_MRLEN] = { .type = NLA_U64 },
94 [RDMA_NLDEV_ATTR_RES_PD] = { .type = NLA_NESTED },
95 [RDMA_NLDEV_ATTR_RES_PD_ENTRY] = { .type = NLA_NESTED },
96 [RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY] = { .type = NLA_U32 },
97 [RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY] = { .type = NLA_U32 },
98 [RDMA_NLDEV_ATTR_NDEV_INDEX] = { .type = NLA_U32 },
99 [RDMA_NLDEV_ATTR_NDEV_NAME] = { .type = NLA_NUL_STRING,
100 .len = IFNAMSIZ },
101};
102
103static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
104{
105 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
106 return -EMSGSIZE;
107 if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name))
108 return -EMSGSIZE;
109
110 return 0;
111}
112
113static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
114{
115 char fw[IB_FW_VERSION_NAME_MAX];
116
117 if (fill_nldev_handle(msg, device))
118 return -EMSGSIZE;
119
120 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
121 return -EMSGSIZE;
122
123 BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64));
124 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
125 device->attrs.device_cap_flags, 0))
126 return -EMSGSIZE;
127
128 ib_get_device_fw_str(device, fw);
129 /* Device without FW has strlen(fw) = 0 */
130 if (strlen(fw) && nla_put_string(msg, RDMA_NLDEV_ATTR_FW_VERSION, fw))
131 return -EMSGSIZE;
132
133 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID,
134 be64_to_cpu(device->node_guid), 0))
135 return -EMSGSIZE;
136 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID,
137 be64_to_cpu(device->attrs.sys_image_guid), 0))
138 return -EMSGSIZE;
139 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type))
140 return -EMSGSIZE;
141 return 0;
142}
143
144static int fill_port_info(struct sk_buff *msg,
145 struct ib_device *device, u32 port,
146 const struct net *net)
147{
148 struct net_device *netdev = NULL;
149 struct ib_port_attr attr;
150 int ret;
151
152 if (fill_nldev_handle(msg, device))
153 return -EMSGSIZE;
154
155 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
156 return -EMSGSIZE;
157
158 ret = ib_query_port(device, port, &attr);
159 if (ret)
160 return ret;
161
162 BUILD_BUG_ON(sizeof(attr.port_cap_flags) > sizeof(u64));
163 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
164 (u64)attr.port_cap_flags, 0))
165 return -EMSGSIZE;
166 if (rdma_protocol_ib(device, port) &&
167 nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX,
168 attr.subnet_prefix, 0))
169 return -EMSGSIZE;
170 if (rdma_protocol_ib(device, port)) {
171 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid))
172 return -EMSGSIZE;
173 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_SM_LID, attr.sm_lid))
174 return -EMSGSIZE;
175 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_LMC, attr.lmc))
176 return -EMSGSIZE;
177 }
178 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_STATE, attr.state))
179 return -EMSGSIZE;
180 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_PORT_PHYS_STATE, attr.phys_state))
181 return -EMSGSIZE;
182
183 if (device->get_netdev)
184 netdev = device->get_netdev(device, port);
185
186 if (netdev && net_eq(dev_net(netdev), net)) {
187 ret = nla_put_u32(msg,
188 RDMA_NLDEV_ATTR_NDEV_INDEX, netdev->ifindex);
189 if (ret)
190 goto out;
191 ret = nla_put_string(msg,
192 RDMA_NLDEV_ATTR_NDEV_NAME, netdev->name);
193 }
194
195out:
196 if (netdev)
197 dev_put(netdev);
198 return ret;
199}
200
201static int fill_res_info_entry(struct sk_buff *msg,
202 const char *name, u64 curr)
203{
204 struct nlattr *entry_attr;
205
206 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY);
207 if (!entry_attr)
208 return -EMSGSIZE;
209
210 if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME, name))
211 goto err;
212 if (nla_put_u64_64bit(msg,
213 RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr, 0))
214 goto err;
215
216 nla_nest_end(msg, entry_attr);
217 return 0;
218
219err:
220 nla_nest_cancel(msg, entry_attr);
221 return -EMSGSIZE;
222}
223
224static int fill_res_info(struct sk_buff *msg, struct ib_device *device)
225{
226 static const char * const names[RDMA_RESTRACK_MAX] = {
227 [RDMA_RESTRACK_PD] = "pd",
228 [RDMA_RESTRACK_CQ] = "cq",
229 [RDMA_RESTRACK_QP] = "qp",
230 [RDMA_RESTRACK_CM_ID] = "cm_id",
231 [RDMA_RESTRACK_MR] = "mr",
232 };
233
234 struct rdma_restrack_root *res = &device->res;
235 struct nlattr *table_attr;
236 int ret, i, curr;
237
238 if (fill_nldev_handle(msg, device))
239 return -EMSGSIZE;
240
241 table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_SUMMARY);
242 if (!table_attr)
243 return -EMSGSIZE;
244
245 for (i = 0; i < RDMA_RESTRACK_MAX; i++) {
246 if (!names[i])
247 continue;
248 curr = rdma_restrack_count(res, i, task_active_pid_ns(current));
249 ret = fill_res_info_entry(msg, names[i], curr);
250 if (ret)
251 goto err;
252 }
253
254 nla_nest_end(msg, table_attr);
255 return 0;
256
257err:
258 nla_nest_cancel(msg, table_attr);
259 return ret;
260}
261
262static int fill_res_name_pid(struct sk_buff *msg,
263 struct rdma_restrack_entry *res)
264{
265 /*
266 * For user resources, user is should read /proc/PID/comm to get the
267 * name of the task file.
268 */
269 if (rdma_is_kernel_res(res)) {
270 if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_KERN_NAME,
271 res->kern_name))
272 return -EMSGSIZE;
273 } else {
274 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PID,
275 task_pid_vnr(res->task)))
276 return -EMSGSIZE;
277 }
278 return 0;
279}
280
281static int fill_res_qp_entry(struct sk_buff *msg, struct netlink_callback *cb,
282 struct rdma_restrack_entry *res, uint32_t port)
283{
284 struct ib_qp *qp = container_of(res, struct ib_qp, res);
285 struct ib_qp_init_attr qp_init_attr;
286 struct nlattr *entry_attr;
287 struct ib_qp_attr qp_attr;
288 int ret;
289
290 ret = ib_query_qp(qp, &qp_attr, 0, &qp_init_attr);
291 if (ret)
292 return ret;
293
294 if (port && port != qp_attr.port_num)
295 return 0;
296
297 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_QP_ENTRY);
298 if (!entry_attr)
299 goto out;
300
301 /* In create_qp() port is not set yet */
302 if (qp_attr.port_num &&
303 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, qp_attr.port_num))
304 goto err;
305
306 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, qp->qp_num))
307 goto err;
308 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC) {
309 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQPN,
310 qp_attr.dest_qp_num))
311 goto err;
312 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RQ_PSN,
313 qp_attr.rq_psn))
314 goto err;
315 }
316
317 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_SQ_PSN, qp_attr.sq_psn))
318 goto err;
319
320 if (qp->qp_type == IB_QPT_RC || qp->qp_type == IB_QPT_UC ||
321 qp->qp_type == IB_QPT_XRC_INI || qp->qp_type == IB_QPT_XRC_TGT) {
322 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE,
323 qp_attr.path_mig_state))
324 goto err;
325 }
326 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, qp->qp_type))
327 goto err;
328 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, qp_attr.qp_state))
329 goto err;
330
331 if (fill_res_name_pid(msg, res))
332 goto err;
333
334 nla_nest_end(msg, entry_attr);
335 return 0;
336
337err:
338 nla_nest_cancel(msg, entry_attr);
339out:
340 return -EMSGSIZE;
341}
342
343static int fill_res_cm_id_entry(struct sk_buff *msg,
344 struct netlink_callback *cb,
345 struct rdma_restrack_entry *res, uint32_t port)
346{
347 struct rdma_id_private *id_priv =
348 container_of(res, struct rdma_id_private, res);
349 struct rdma_cm_id *cm_id = &id_priv->id;
350 struct nlattr *entry_attr;
351
352 if (port && port != cm_id->port_num)
353 return 0;
354
355 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY);
356 if (!entry_attr)
357 goto out;
358
359 if (cm_id->port_num &&
360 nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num))
361 goto err;
362
363 if (id_priv->qp_num) {
364 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LQPN, id_priv->qp_num))
365 goto err;
366 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_TYPE, cm_id->qp_type))
367 goto err;
368 }
369
370 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PS, cm_id->ps))
371 goto err;
372
373 if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_STATE, id_priv->state))
374 goto err;
375
376 if (cm_id->route.addr.src_addr.ss_family &&
377 nla_put(msg, RDMA_NLDEV_ATTR_RES_SRC_ADDR,
378 sizeof(cm_id->route.addr.src_addr),
379 &cm_id->route.addr.src_addr))
380 goto err;
381 if (cm_id->route.addr.dst_addr.ss_family &&
382 nla_put(msg, RDMA_NLDEV_ATTR_RES_DST_ADDR,
383 sizeof(cm_id->route.addr.dst_addr),
384 &cm_id->route.addr.dst_addr))
385 goto err;
386
387 if (fill_res_name_pid(msg, res))
388 goto err;
389
390 nla_nest_end(msg, entry_attr);
391 return 0;
392
393err:
394 nla_nest_cancel(msg, entry_attr);
395out:
396 return -EMSGSIZE;
397}
398
399static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb,
400 struct rdma_restrack_entry *res, uint32_t port)
401{
402 struct ib_cq *cq = container_of(res, struct ib_cq, res);
403 struct nlattr *entry_attr;
404
405 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CQ_ENTRY);
406 if (!entry_attr)
407 goto out;
408
409 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))
410 goto err;
411 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
412 atomic_read(&cq->usecnt), 0))
413 goto err;
414
415 /* Poll context is only valid for kernel CQs */
416 if (rdma_is_kernel_res(res) &&
417 nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
418 goto err;
419
420 if (fill_res_name_pid(msg, res))
421 goto err;
422
423 nla_nest_end(msg, entry_attr);
424 return 0;
425
426err:
427 nla_nest_cancel(msg, entry_attr);
428out:
429 return -EMSGSIZE;
430}
431
432static int fill_res_mr_entry(struct sk_buff *msg, struct netlink_callback *cb,
433 struct rdma_restrack_entry *res, uint32_t port)
434{
435 struct ib_mr *mr = container_of(res, struct ib_mr, res);
436 struct nlattr *entry_attr;
437
438 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_MR_ENTRY);
439 if (!entry_attr)
440 goto out;
441
442 if (netlink_capable(cb->skb, CAP_NET_ADMIN)) {
443 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_RKEY, mr->rkey))
444 goto err;
445 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LKEY, mr->lkey))
446 goto err;
447 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_IOVA,
448 mr->iova, 0))
449 goto err;
450 }
451
452 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length, 0))
453 goto err;
454
455 if (fill_res_name_pid(msg, res))
456 goto err;
457
458 nla_nest_end(msg, entry_attr);
459 return 0;
460
461err:
462 nla_nest_cancel(msg, entry_attr);
463out:
464 return -EMSGSIZE;
465}
466
467static int fill_res_pd_entry(struct sk_buff *msg, struct netlink_callback *cb,
468 struct rdma_restrack_entry *res, uint32_t port)
469{
470 struct ib_pd *pd = container_of(res, struct ib_pd, res);
471 struct nlattr *entry_attr;
472
473 entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_PD_ENTRY);
474 if (!entry_attr)
475 goto out;
476
477 if (netlink_capable(cb->skb, CAP_NET_ADMIN)) {
478 if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY,
479 pd->local_dma_lkey))
480 goto err;
481 if ((pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) &&
482 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY,
483 pd->unsafe_global_rkey))
484 goto err;
485 }
486 if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
487 atomic_read(&pd->usecnt), 0))
488 goto err;
489 if ((pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) &&
490 nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY,
491 pd->unsafe_global_rkey))
492 goto err;
493
494 if (fill_res_name_pid(msg, res))
495 goto err;
496
497 nla_nest_end(msg, entry_attr);
498 return 0;
499
500err:
501 nla_nest_cancel(msg, entry_attr);
502out:
503 return -EMSGSIZE;
504}
505
506static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
507 struct netlink_ext_ack *extack)
508{
509 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
510 struct ib_device *device;
511 struct sk_buff *msg;
512 u32 index;
513 int err;
514
515 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
516 nldev_policy, extack);
517 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
518 return -EINVAL;
519
520 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
521
522 device = ib_device_get_by_index(index);
523 if (!device)
524 return -EINVAL;
525
526 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
527 if (!msg) {
528 err = -ENOMEM;
529 goto err;
530 }
531
532 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
533 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
534 0, 0);
535
536 err = fill_dev_info(msg, device);
537 if (err)
538 goto err_free;
539
540 nlmsg_end(msg, nlh);
541
542 put_device(&device->dev);
543 return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
544
545err_free:
546 nlmsg_free(msg);
547err:
548 put_device(&device->dev);
549 return err;
550}
551
552static int _nldev_get_dumpit(struct ib_device *device,
553 struct sk_buff *skb,
554 struct netlink_callback *cb,
555 unsigned int idx)
556{
557 int start = cb->args[0];
558 struct nlmsghdr *nlh;
559
560 if (idx < start)
561 return 0;
562
563 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
564 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
565 0, NLM_F_MULTI);
566
567 if (fill_dev_info(skb, device)) {
568 nlmsg_cancel(skb, nlh);
569 goto out;
570 }
571
572 nlmsg_end(skb, nlh);
573
574 idx++;
575
576out: cb->args[0] = idx;
577 return skb->len;
578}
579
580static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
581{
582 /*
583 * There is no need to take lock, because
584 * we are relying on ib_core's lists_rwsem
585 */
586 return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);
587}
588
589static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
590 struct netlink_ext_ack *extack)
591{
592 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
593 struct ib_device *device;
594 struct sk_buff *msg;
595 u32 index;
596 u32 port;
597 int err;
598
599 err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
600 nldev_policy, extack);
601 if (err ||
602 !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
603 !tb[RDMA_NLDEV_ATTR_PORT_INDEX])
604 return -EINVAL;
605
606 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
607 device = ib_device_get_by_index(index);
608 if (!device)
609 return -EINVAL;
610
611 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
612 if (!rdma_is_port_valid(device, port)) {
613 err = -EINVAL;
614 goto err;
615 }
616
617 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
618 if (!msg) {
619 err = -ENOMEM;
620 goto err;
621 }
622
623 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
624 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
625 0, 0);
626
627 err = fill_port_info(msg, device, port, sock_net(skb->sk));
628 if (err)
629 goto err_free;
630
631 nlmsg_end(msg, nlh);
632 put_device(&device->dev);
633
634 return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
635
636err_free:
637 nlmsg_free(msg);
638err:
639 put_device(&device->dev);
640 return err;
641}
642
643static int nldev_port_get_dumpit(struct sk_buff *skb,
644 struct netlink_callback *cb)
645{
646 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
647 struct ib_device *device;
648 int start = cb->args[0];
649 struct nlmsghdr *nlh;
650 u32 idx = 0;
651 u32 ifindex;
652 int err;
653 u32 p;
654
655 err = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
656 nldev_policy, NULL);
657 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
658 return -EINVAL;
659
660 ifindex = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
661 device = ib_device_get_by_index(ifindex);
662 if (!device)
663 return -EINVAL;
664
665 for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) {
666 /*
667 * The dumpit function returns all information from specific
668 * index. This specific index is taken from the netlink
669 * messages request sent by user and it is available
670 * in cb->args[0].
671 *
672 * Usually, the user doesn't fill this field and it causes
673 * to return everything.
674 *
675 */
676 if (idx < start) {
677 idx++;
678 continue;
679 }
680
681 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
682 cb->nlh->nlmsg_seq,
683 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV,
684 RDMA_NLDEV_CMD_PORT_GET),
685 0, NLM_F_MULTI);
686
687 if (fill_port_info(skb, device, p, sock_net(skb->sk))) {
688 nlmsg_cancel(skb, nlh);
689 goto out;
690 }
691 idx++;
692 nlmsg_end(skb, nlh);
693 }
694
695out:
696 put_device(&device->dev);
697 cb->args[0] = idx;
698 return skb->len;
699}
700
701static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
702 struct netlink_ext_ack *extack)
703{
704 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
705 struct ib_device *device;
706 struct sk_buff *msg;
707 u32 index;
708 int ret;
709
710 ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
711 nldev_policy, extack);
712 if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
713 return -EINVAL;
714
715 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
716 device = ib_device_get_by_index(index);
717 if (!device)
718 return -EINVAL;
719
720 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
721 if (!msg) {
722 ret = -ENOMEM;
723 goto err;
724 }
725
726 nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq,
727 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
728 0, 0);
729
730 ret = fill_res_info(msg, device);
731 if (ret)
732 goto err_free;
733
734 nlmsg_end(msg, nlh);
735 put_device(&device->dev);
736 return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);
737
738err_free:
739 nlmsg_free(msg);
740err:
741 put_device(&device->dev);
742 return ret;
743}
744
745static int _nldev_res_get_dumpit(struct ib_device *device,
746 struct sk_buff *skb,
747 struct netlink_callback *cb,
748 unsigned int idx)
749{
750 int start = cb->args[0];
751 struct nlmsghdr *nlh;
752
753 if (idx < start)
754 return 0;
755
756 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
757 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET),
758 0, NLM_F_MULTI);
759
760 if (fill_res_info(skb, device)) {
761 nlmsg_cancel(skb, nlh);
762 goto out;
763 }
764
765 nlmsg_end(skb, nlh);
766
767 idx++;
768
769out:
770 cb->args[0] = idx;
771 return skb->len;
772}
773
774static int nldev_res_get_dumpit(struct sk_buff *skb,
775 struct netlink_callback *cb)
776{
777 return ib_enum_all_devs(_nldev_res_get_dumpit, skb, cb);
778}
779
780struct nldev_fill_res_entry {
781 int (*fill_res_func)(struct sk_buff *msg, struct netlink_callback *cb,
782 struct rdma_restrack_entry *res, u32 port);
783 enum rdma_nldev_attr nldev_attr;
784 enum rdma_nldev_command nldev_cmd;
785};
786
787static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
788 [RDMA_RESTRACK_QP] = {
789 .fill_res_func = fill_res_qp_entry,
790 .nldev_cmd = RDMA_NLDEV_CMD_RES_QP_GET,
791 .nldev_attr = RDMA_NLDEV_ATTR_RES_QP,
792 },
793 [RDMA_RESTRACK_CM_ID] = {
794 .fill_res_func = fill_res_cm_id_entry,
795 .nldev_cmd = RDMA_NLDEV_CMD_RES_CM_ID_GET,
796 .nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
797 },
798 [RDMA_RESTRACK_CQ] = {
799 .fill_res_func = fill_res_cq_entry,
800 .nldev_cmd = RDMA_NLDEV_CMD_RES_CQ_GET,
801 .nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
802 },
803 [RDMA_RESTRACK_MR] = {
804 .fill_res_func = fill_res_mr_entry,
805 .nldev_cmd = RDMA_NLDEV_CMD_RES_MR_GET,
806 .nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
807 },
808 [RDMA_RESTRACK_PD] = {
809 .fill_res_func = fill_res_pd_entry,
810 .nldev_cmd = RDMA_NLDEV_CMD_RES_PD_GET,
811 .nldev_attr = RDMA_NLDEV_ATTR_RES_PD,
812 },
813};
814
815static int res_get_common_dumpit(struct sk_buff *skb,
816 struct netlink_callback *cb,
817 enum rdma_restrack_type res_type)
818{
819 const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
820 struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
821 struct rdma_restrack_entry *res;
822 int err, ret = 0, idx = 0;
823 struct nlattr *table_attr;
824 struct ib_device *device;
825 int start = cb->args[0];
826 struct nlmsghdr *nlh;
827 u32 index, port = 0;
828 bool filled = false;
829
830 err = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
831 nldev_policy, NULL);
832 /*
833 * Right now, we are expecting the device index to get res information,
834 * but it is possible to extend this code to return all devices in
835 * one shot by checking the existence of RDMA_NLDEV_ATTR_DEV_INDEX.
836 * if it doesn't exist, we will iterate over all devices.
837 *
838 * But it is not needed for now.
839 */
840 if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
841 return -EINVAL;
842
843 index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
844 device = ib_device_get_by_index(index);
845 if (!device)
846 return -EINVAL;
847
848 /*
849 * If no PORT_INDEX is supplied, we will return all QPs from that device
850 */
851 if (tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
852 port = nla_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
853 if (!rdma_is_port_valid(device, port)) {
854 ret = -EINVAL;
855 goto err_index;
856 }
857 }
858
859 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
860 RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, fe->nldev_cmd),
861 0, NLM_F_MULTI);
862
863 if (fill_nldev_handle(skb, device)) {
864 ret = -EMSGSIZE;
865 goto err;
866 }
867
868 table_attr = nla_nest_start(skb, fe->nldev_attr);
869 if (!table_attr) {
870 ret = -EMSGSIZE;
871 goto err;
872 }
873
874 down_read(&device->res.rwsem);
875 hash_for_each_possible(device->res.hash, res, node, res_type) {
876 if (idx < start)
877 goto next;
878
879 if ((rdma_is_kernel_res(res) &&
880 task_active_pid_ns(current) != &init_pid_ns) ||
881 (!rdma_is_kernel_res(res) && task_active_pid_ns(current) !=
882 task_active_pid_ns(res->task)))
883 /*
884 * 1. Kern resources should be visible in init
885 * namspace only
886 * 2. Present only resources visible in the current
887 * namespace
888 */
889 goto next;
890
891 if (!rdma_restrack_get(res))
892 /*
893 * Resource is under release now, but we are not
894 * relesing lock now, so it will be released in
895 * our next pass, once we will get ->next pointer.
896 */
897 goto next;
898
899 filled = true;
900
901 up_read(&device->res.rwsem);
902 ret = fe->fill_res_func(skb, cb, res, port);
903 down_read(&device->res.rwsem);
904 /*
905 * Return resource back, but it won't be released till
906 * the &device->res.rwsem will be released for write.
907 */
908 rdma_restrack_put(res);
909
910 if (ret == -EMSGSIZE)
911 /*
912 * There is a chance to optimize here.
913 * It can be done by using list_prepare_entry
914 * and list_for_each_entry_continue afterwards.
915 */
916 break;
917 if (ret)
918 goto res_err;
919next: idx++;
920 }
921 up_read(&device->res.rwsem);
922
923 nla_nest_end(skb, table_attr);
924 nlmsg_end(skb, nlh);
925 cb->args[0] = idx;
926
927 /*
928 * No more entries to fill, cancel the message and
929 * return 0 to mark end of dumpit.
930 */
931 if (!filled)
932 goto err;
933
934 put_device(&device->dev);
935 return skb->len;
936
937res_err:
938 nla_nest_cancel(skb, table_attr);
939 up_read(&device->res.rwsem);
940
941err:
942 nlmsg_cancel(skb, nlh);
943
944err_index:
945 put_device(&device->dev);
946 return ret;
947}
948
949static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
950 struct netlink_callback *cb)
951{
952 return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_QP);
953}
954
955static int nldev_res_get_cm_id_dumpit(struct sk_buff *skb,
956 struct netlink_callback *cb)
957{
958 return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_CM_ID);
959}
960
961static int nldev_res_get_cq_dumpit(struct sk_buff *skb,
962 struct netlink_callback *cb)
963{
964 return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_CQ);
965}
966
967static int nldev_res_get_mr_dumpit(struct sk_buff *skb,
968 struct netlink_callback *cb)
969{
970 return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_MR);
971}
972
973static int nldev_res_get_pd_dumpit(struct sk_buff *skb,
974 struct netlink_callback *cb)
975{
976 return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_PD);
977}
978
979static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
980 [RDMA_NLDEV_CMD_GET] = {
981 .doit = nldev_get_doit,
982 .dump = nldev_get_dumpit,
983 },
984 [RDMA_NLDEV_CMD_PORT_GET] = {
985 .doit = nldev_port_get_doit,
986 .dump = nldev_port_get_dumpit,
987 },
988 [RDMA_NLDEV_CMD_RES_GET] = {
989 .doit = nldev_res_get_doit,
990 .dump = nldev_res_get_dumpit,
991 },
992 [RDMA_NLDEV_CMD_RES_QP_GET] = {
993 .dump = nldev_res_get_qp_dumpit,
994 /*
995 * .doit is not implemented yet for two reasons:
996 * 1. It is not needed yet.
997 * 2. There is a need to provide identifier, while it is easy
998 * for the QPs (device index + port index + LQPN), it is not
999 * the case for the rest of resources (PD and CQ). Because it
1000 * is better to provide similar interface for all resources,
1001 * let's wait till we will have other resources implemented
1002 * too.
1003 */
1004 },
1005 [RDMA_NLDEV_CMD_RES_CM_ID_GET] = {
1006 .dump = nldev_res_get_cm_id_dumpit,
1007 },
1008 [RDMA_NLDEV_CMD_RES_CQ_GET] = {
1009 .dump = nldev_res_get_cq_dumpit,
1010 },
1011 [RDMA_NLDEV_CMD_RES_MR_GET] = {
1012 .dump = nldev_res_get_mr_dumpit,
1013 },
1014 [RDMA_NLDEV_CMD_RES_PD_GET] = {
1015 .dump = nldev_res_get_pd_dumpit,
1016 },
1017};
1018
1019void __init nldev_init(void)
1020{
1021 rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
1022}
1023
1024void __exit nldev_exit(void)
1025{
1026 rdma_nl_unregister(RDMA_NL_NLDEV);
1027}
1028
1029MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);