drm/modes: Fix drm_mode_vrefres() docs
[drm/drm-misc.git] / net / core / netdev-genl.c
blob9527dd46e4dc39a43e965b833df306a5cc44c94d
1 // SPDX-License-Identifier: GPL-2.0-only
3 #include <linux/netdevice.h>
4 #include <linux/notifier.h>
5 #include <linux/rtnetlink.h>
6 #include <net/busy_poll.h>
7 #include <net/net_namespace.h>
8 #include <net/netdev_queues.h>
9 #include <net/netdev_rx_queue.h>
10 #include <net/sock.h>
11 #include <net/xdp.h>
12 #include <net/xdp_sock.h>
14 #include "dev.h"
15 #include "devmem.h"
16 #include "netdev-genl-gen.h"
18 struct netdev_nl_dump_ctx {
19 unsigned long ifindex;
20 unsigned int rxq_idx;
21 unsigned int txq_idx;
22 unsigned int napi_id;
25 static struct netdev_nl_dump_ctx *netdev_dump_ctx(struct netlink_callback *cb)
27 NL_ASSERT_CTX_FITS(struct netdev_nl_dump_ctx);
29 return (struct netdev_nl_dump_ctx *)cb->ctx;
32 static int
33 netdev_nl_dev_fill(struct net_device *netdev, struct sk_buff *rsp,
34 const struct genl_info *info)
36 u64 xsk_features = 0;
37 u64 xdp_rx_meta = 0;
38 void *hdr;
40 hdr = genlmsg_iput(rsp, info);
41 if (!hdr)
42 return -EMSGSIZE;
44 #define XDP_METADATA_KFUNC(_, flag, __, xmo) \
45 if (netdev->xdp_metadata_ops && netdev->xdp_metadata_ops->xmo) \
46 xdp_rx_meta |= flag;
47 XDP_METADATA_KFUNC_xxx
48 #undef XDP_METADATA_KFUNC
50 if (netdev->xsk_tx_metadata_ops) {
51 if (netdev->xsk_tx_metadata_ops->tmo_fill_timestamp)
52 xsk_features |= NETDEV_XSK_FLAGS_TX_TIMESTAMP;
53 if (netdev->xsk_tx_metadata_ops->tmo_request_checksum)
54 xsk_features |= NETDEV_XSK_FLAGS_TX_CHECKSUM;
57 if (nla_put_u32(rsp, NETDEV_A_DEV_IFINDEX, netdev->ifindex) ||
58 nla_put_u64_64bit(rsp, NETDEV_A_DEV_XDP_FEATURES,
59 netdev->xdp_features, NETDEV_A_DEV_PAD) ||
60 nla_put_u64_64bit(rsp, NETDEV_A_DEV_XDP_RX_METADATA_FEATURES,
61 xdp_rx_meta, NETDEV_A_DEV_PAD) ||
62 nla_put_u64_64bit(rsp, NETDEV_A_DEV_XSK_FEATURES,
63 xsk_features, NETDEV_A_DEV_PAD))
64 goto err_cancel_msg;
66 if (netdev->xdp_features & NETDEV_XDP_ACT_XSK_ZEROCOPY) {
67 if (nla_put_u32(rsp, NETDEV_A_DEV_XDP_ZC_MAX_SEGS,
68 netdev->xdp_zc_max_segs))
69 goto err_cancel_msg;
72 genlmsg_end(rsp, hdr);
74 return 0;
76 err_cancel_msg:
77 genlmsg_cancel(rsp, hdr);
78 return -EMSGSIZE;
81 static void
82 netdev_genl_dev_notify(struct net_device *netdev, int cmd)
84 struct genl_info info;
85 struct sk_buff *ntf;
87 if (!genl_has_listeners(&netdev_nl_family, dev_net(netdev),
88 NETDEV_NLGRP_MGMT))
89 return;
91 genl_info_init_ntf(&info, &netdev_nl_family, cmd);
93 ntf = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
94 if (!ntf)
95 return;
97 if (netdev_nl_dev_fill(netdev, ntf, &info)) {
98 nlmsg_free(ntf);
99 return;
102 genlmsg_multicast_netns(&netdev_nl_family, dev_net(netdev), ntf,
103 0, NETDEV_NLGRP_MGMT, GFP_KERNEL);
106 int netdev_nl_dev_get_doit(struct sk_buff *skb, struct genl_info *info)
108 struct net_device *netdev;
109 struct sk_buff *rsp;
110 u32 ifindex;
111 int err;
113 if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_DEV_IFINDEX))
114 return -EINVAL;
116 ifindex = nla_get_u32(info->attrs[NETDEV_A_DEV_IFINDEX]);
118 rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
119 if (!rsp)
120 return -ENOMEM;
122 rtnl_lock();
124 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
125 if (netdev)
126 err = netdev_nl_dev_fill(netdev, rsp, info);
127 else
128 err = -ENODEV;
130 rtnl_unlock();
132 if (err)
133 goto err_free_msg;
135 return genlmsg_reply(rsp, info);
137 err_free_msg:
138 nlmsg_free(rsp);
139 return err;
142 int netdev_nl_dev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
144 struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
145 struct net *net = sock_net(skb->sk);
146 struct net_device *netdev;
147 int err = 0;
149 rtnl_lock();
150 for_each_netdev_dump(net, netdev, ctx->ifindex) {
151 err = netdev_nl_dev_fill(netdev, skb, genl_info_dump(cb));
152 if (err < 0)
153 break;
155 rtnl_unlock();
157 return err;
160 static int
161 netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi,
162 const struct genl_info *info)
164 unsigned long irq_suspend_timeout;
165 unsigned long gro_flush_timeout;
166 u32 napi_defer_hard_irqs;
167 void *hdr;
168 pid_t pid;
170 if (WARN_ON_ONCE(!napi->dev))
171 return -EINVAL;
172 if (!(napi->dev->flags & IFF_UP))
173 return 0;
175 hdr = genlmsg_iput(rsp, info);
176 if (!hdr)
177 return -EMSGSIZE;
179 if (napi->napi_id >= MIN_NAPI_ID &&
180 nla_put_u32(rsp, NETDEV_A_NAPI_ID, napi->napi_id))
181 goto nla_put_failure;
183 if (nla_put_u32(rsp, NETDEV_A_NAPI_IFINDEX, napi->dev->ifindex))
184 goto nla_put_failure;
186 if (napi->irq >= 0 && nla_put_u32(rsp, NETDEV_A_NAPI_IRQ, napi->irq))
187 goto nla_put_failure;
189 if (napi->thread) {
190 pid = task_pid_nr(napi->thread);
191 if (nla_put_u32(rsp, NETDEV_A_NAPI_PID, pid))
192 goto nla_put_failure;
195 napi_defer_hard_irqs = napi_get_defer_hard_irqs(napi);
196 if (nla_put_s32(rsp, NETDEV_A_NAPI_DEFER_HARD_IRQS,
197 napi_defer_hard_irqs))
198 goto nla_put_failure;
200 irq_suspend_timeout = napi_get_irq_suspend_timeout(napi);
201 if (nla_put_uint(rsp, NETDEV_A_NAPI_IRQ_SUSPEND_TIMEOUT,
202 irq_suspend_timeout))
203 goto nla_put_failure;
205 gro_flush_timeout = napi_get_gro_flush_timeout(napi);
206 if (nla_put_uint(rsp, NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT,
207 gro_flush_timeout))
208 goto nla_put_failure;
210 genlmsg_end(rsp, hdr);
212 return 0;
214 nla_put_failure:
215 genlmsg_cancel(rsp, hdr);
216 return -EMSGSIZE;
219 int netdev_nl_napi_get_doit(struct sk_buff *skb, struct genl_info *info)
221 struct napi_struct *napi;
222 struct sk_buff *rsp;
223 u32 napi_id;
224 int err;
226 if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID))
227 return -EINVAL;
229 napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]);
231 rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
232 if (!rsp)
233 return -ENOMEM;
235 rtnl_lock();
236 rcu_read_lock();
238 napi = napi_by_id(napi_id);
239 if (napi) {
240 err = netdev_nl_napi_fill_one(rsp, napi, info);
241 } else {
242 NL_SET_BAD_ATTR(info->extack, info->attrs[NETDEV_A_NAPI_ID]);
243 err = -ENOENT;
246 rcu_read_unlock();
247 rtnl_unlock();
249 if (err)
250 goto err_free_msg;
252 return genlmsg_reply(rsp, info);
254 err_free_msg:
255 nlmsg_free(rsp);
256 return err;
259 static int
260 netdev_nl_napi_dump_one(struct net_device *netdev, struct sk_buff *rsp,
261 const struct genl_info *info,
262 struct netdev_nl_dump_ctx *ctx)
264 struct napi_struct *napi;
265 int err = 0;
267 if (!(netdev->flags & IFF_UP))
268 return err;
270 list_for_each_entry(napi, &netdev->napi_list, dev_list) {
271 if (ctx->napi_id && napi->napi_id >= ctx->napi_id)
272 continue;
274 err = netdev_nl_napi_fill_one(rsp, napi, info);
275 if (err)
276 return err;
277 ctx->napi_id = napi->napi_id;
279 return err;
282 int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
284 struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
285 const struct genl_info *info = genl_info_dump(cb);
286 struct net *net = sock_net(skb->sk);
287 struct net_device *netdev;
288 u32 ifindex = 0;
289 int err = 0;
291 if (info->attrs[NETDEV_A_NAPI_IFINDEX])
292 ifindex = nla_get_u32(info->attrs[NETDEV_A_NAPI_IFINDEX]);
294 rtnl_lock();
295 if (ifindex) {
296 netdev = __dev_get_by_index(net, ifindex);
297 if (netdev)
298 err = netdev_nl_napi_dump_one(netdev, skb, info, ctx);
299 else
300 err = -ENODEV;
301 } else {
302 for_each_netdev_dump(net, netdev, ctx->ifindex) {
303 err = netdev_nl_napi_dump_one(netdev, skb, info, ctx);
304 if (err < 0)
305 break;
306 ctx->napi_id = 0;
309 rtnl_unlock();
311 return err;
314 static int
315 netdev_nl_napi_set_config(struct napi_struct *napi, struct genl_info *info)
317 u64 irq_suspend_timeout = 0;
318 u64 gro_flush_timeout = 0;
319 u32 defer = 0;
321 if (info->attrs[NETDEV_A_NAPI_DEFER_HARD_IRQS]) {
322 defer = nla_get_u32(info->attrs[NETDEV_A_NAPI_DEFER_HARD_IRQS]);
323 napi_set_defer_hard_irqs(napi, defer);
326 if (info->attrs[NETDEV_A_NAPI_IRQ_SUSPEND_TIMEOUT]) {
327 irq_suspend_timeout = nla_get_uint(info->attrs[NETDEV_A_NAPI_IRQ_SUSPEND_TIMEOUT]);
328 napi_set_irq_suspend_timeout(napi, irq_suspend_timeout);
331 if (info->attrs[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT]) {
332 gro_flush_timeout = nla_get_uint(info->attrs[NETDEV_A_NAPI_GRO_FLUSH_TIMEOUT]);
333 napi_set_gro_flush_timeout(napi, gro_flush_timeout);
336 return 0;
339 int netdev_nl_napi_set_doit(struct sk_buff *skb, struct genl_info *info)
341 struct napi_struct *napi;
342 unsigned int napi_id;
343 int err;
345 if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID))
346 return -EINVAL;
348 napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]);
350 rtnl_lock();
351 rcu_read_lock();
353 napi = napi_by_id(napi_id);
354 if (napi) {
355 err = netdev_nl_napi_set_config(napi, info);
356 } else {
357 NL_SET_BAD_ATTR(info->extack, info->attrs[NETDEV_A_NAPI_ID]);
358 err = -ENOENT;
361 rcu_read_unlock();
362 rtnl_unlock();
364 return err;
367 static int
368 netdev_nl_queue_fill_one(struct sk_buff *rsp, struct net_device *netdev,
369 u32 q_idx, u32 q_type, const struct genl_info *info)
371 struct net_devmem_dmabuf_binding *binding;
372 struct netdev_rx_queue *rxq;
373 struct netdev_queue *txq;
374 void *hdr;
376 hdr = genlmsg_iput(rsp, info);
377 if (!hdr)
378 return -EMSGSIZE;
380 if (nla_put_u32(rsp, NETDEV_A_QUEUE_ID, q_idx) ||
381 nla_put_u32(rsp, NETDEV_A_QUEUE_TYPE, q_type) ||
382 nla_put_u32(rsp, NETDEV_A_QUEUE_IFINDEX, netdev->ifindex))
383 goto nla_put_failure;
385 switch (q_type) {
386 case NETDEV_QUEUE_TYPE_RX:
387 rxq = __netif_get_rx_queue(netdev, q_idx);
388 if (rxq->napi && nla_put_u32(rsp, NETDEV_A_QUEUE_NAPI_ID,
389 rxq->napi->napi_id))
390 goto nla_put_failure;
392 binding = rxq->mp_params.mp_priv;
393 if (binding &&
394 nla_put_u32(rsp, NETDEV_A_QUEUE_DMABUF, binding->id))
395 goto nla_put_failure;
397 break;
398 case NETDEV_QUEUE_TYPE_TX:
399 txq = netdev_get_tx_queue(netdev, q_idx);
400 if (txq->napi && nla_put_u32(rsp, NETDEV_A_QUEUE_NAPI_ID,
401 txq->napi->napi_id))
402 goto nla_put_failure;
405 genlmsg_end(rsp, hdr);
407 return 0;
409 nla_put_failure:
410 genlmsg_cancel(rsp, hdr);
411 return -EMSGSIZE;
414 static int netdev_nl_queue_validate(struct net_device *netdev, u32 q_id,
415 u32 q_type)
417 switch (q_type) {
418 case NETDEV_QUEUE_TYPE_RX:
419 if (q_id >= netdev->real_num_rx_queues)
420 return -EINVAL;
421 return 0;
422 case NETDEV_QUEUE_TYPE_TX:
423 if (q_id >= netdev->real_num_tx_queues)
424 return -EINVAL;
426 return 0;
429 static int
430 netdev_nl_queue_fill(struct sk_buff *rsp, struct net_device *netdev, u32 q_idx,
431 u32 q_type, const struct genl_info *info)
433 int err = 0;
435 if (!(netdev->flags & IFF_UP))
436 return err;
438 err = netdev_nl_queue_validate(netdev, q_idx, q_type);
439 if (err)
440 return err;
442 return netdev_nl_queue_fill_one(rsp, netdev, q_idx, q_type, info);
445 int netdev_nl_queue_get_doit(struct sk_buff *skb, struct genl_info *info)
447 u32 q_id, q_type, ifindex;
448 struct net_device *netdev;
449 struct sk_buff *rsp;
450 int err;
452 if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_QUEUE_ID) ||
453 GENL_REQ_ATTR_CHECK(info, NETDEV_A_QUEUE_TYPE) ||
454 GENL_REQ_ATTR_CHECK(info, NETDEV_A_QUEUE_IFINDEX))
455 return -EINVAL;
457 q_id = nla_get_u32(info->attrs[NETDEV_A_QUEUE_ID]);
458 q_type = nla_get_u32(info->attrs[NETDEV_A_QUEUE_TYPE]);
459 ifindex = nla_get_u32(info->attrs[NETDEV_A_QUEUE_IFINDEX]);
461 rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
462 if (!rsp)
463 return -ENOMEM;
465 rtnl_lock();
467 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
468 if (netdev)
469 err = netdev_nl_queue_fill(rsp, netdev, q_id, q_type, info);
470 else
471 err = -ENODEV;
473 rtnl_unlock();
475 if (err)
476 goto err_free_msg;
478 return genlmsg_reply(rsp, info);
480 err_free_msg:
481 nlmsg_free(rsp);
482 return err;
485 static int
486 netdev_nl_queue_dump_one(struct net_device *netdev, struct sk_buff *rsp,
487 const struct genl_info *info,
488 struct netdev_nl_dump_ctx *ctx)
490 int err = 0;
491 int i;
493 if (!(netdev->flags & IFF_UP))
494 return err;
496 for (i = ctx->rxq_idx; i < netdev->real_num_rx_queues;) {
497 err = netdev_nl_queue_fill_one(rsp, netdev, i,
498 NETDEV_QUEUE_TYPE_RX, info);
499 if (err)
500 return err;
501 ctx->rxq_idx = i++;
503 for (i = ctx->txq_idx; i < netdev->real_num_tx_queues;) {
504 err = netdev_nl_queue_fill_one(rsp, netdev, i,
505 NETDEV_QUEUE_TYPE_TX, info);
506 if (err)
507 return err;
508 ctx->txq_idx = i++;
511 return err;
514 int netdev_nl_queue_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
516 struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
517 const struct genl_info *info = genl_info_dump(cb);
518 struct net *net = sock_net(skb->sk);
519 struct net_device *netdev;
520 u32 ifindex = 0;
521 int err = 0;
523 if (info->attrs[NETDEV_A_QUEUE_IFINDEX])
524 ifindex = nla_get_u32(info->attrs[NETDEV_A_QUEUE_IFINDEX]);
526 rtnl_lock();
527 if (ifindex) {
528 netdev = __dev_get_by_index(net, ifindex);
529 if (netdev)
530 err = netdev_nl_queue_dump_one(netdev, skb, info, ctx);
531 else
532 err = -ENODEV;
533 } else {
534 for_each_netdev_dump(net, netdev, ctx->ifindex) {
535 err = netdev_nl_queue_dump_one(netdev, skb, info, ctx);
536 if (err < 0)
537 break;
538 ctx->rxq_idx = 0;
539 ctx->txq_idx = 0;
542 rtnl_unlock();
544 return err;
547 #define NETDEV_STAT_NOT_SET (~0ULL)
549 static void netdev_nl_stats_add(void *_sum, const void *_add, size_t size)
551 const u64 *add = _add;
552 u64 *sum = _sum;
554 while (size) {
555 if (*add != NETDEV_STAT_NOT_SET && *sum != NETDEV_STAT_NOT_SET)
556 *sum += *add;
557 sum++;
558 add++;
559 size -= 8;
563 static int netdev_stat_put(struct sk_buff *rsp, unsigned int attr_id, u64 value)
565 if (value == NETDEV_STAT_NOT_SET)
566 return 0;
567 return nla_put_uint(rsp, attr_id, value);
570 static int
571 netdev_nl_stats_write_rx(struct sk_buff *rsp, struct netdev_queue_stats_rx *rx)
573 if (netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_PACKETS, rx->packets) ||
574 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_BYTES, rx->bytes) ||
575 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_ALLOC_FAIL, rx->alloc_fail) ||
576 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_DROPS, rx->hw_drops) ||
577 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_DROP_OVERRUNS, rx->hw_drop_overruns) ||
578 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_CSUM_UNNECESSARY, rx->csum_unnecessary) ||
579 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_CSUM_NONE, rx->csum_none) ||
580 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_CSUM_BAD, rx->csum_bad) ||
581 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_PACKETS, rx->hw_gro_packets) ||
582 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_BYTES, rx->hw_gro_bytes) ||
583 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_WIRE_PACKETS, rx->hw_gro_wire_packets) ||
584 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_WIRE_BYTES, rx->hw_gro_wire_bytes) ||
585 netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_DROP_RATELIMITS, rx->hw_drop_ratelimits))
586 return -EMSGSIZE;
587 return 0;
590 static int
591 netdev_nl_stats_write_tx(struct sk_buff *rsp, struct netdev_queue_stats_tx *tx)
593 if (netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_PACKETS, tx->packets) ||
594 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_BYTES, tx->bytes) ||
595 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROPS, tx->hw_drops) ||
596 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROP_ERRORS, tx->hw_drop_errors) ||
597 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_CSUM_NONE, tx->csum_none) ||
598 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_NEEDS_CSUM, tx->needs_csum) ||
599 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_PACKETS, tx->hw_gso_packets) ||
600 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_BYTES, tx->hw_gso_bytes) ||
601 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_WIRE_PACKETS, tx->hw_gso_wire_packets) ||
602 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_WIRE_BYTES, tx->hw_gso_wire_bytes) ||
603 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROP_RATELIMITS, tx->hw_drop_ratelimits) ||
604 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_STOP, tx->stop) ||
605 netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_WAKE, tx->wake))
606 return -EMSGSIZE;
607 return 0;
610 static int
611 netdev_nl_stats_queue(struct net_device *netdev, struct sk_buff *rsp,
612 u32 q_type, int i, const struct genl_info *info)
614 const struct netdev_stat_ops *ops = netdev->stat_ops;
615 struct netdev_queue_stats_rx rx;
616 struct netdev_queue_stats_tx tx;
617 void *hdr;
619 hdr = genlmsg_iput(rsp, info);
620 if (!hdr)
621 return -EMSGSIZE;
622 if (nla_put_u32(rsp, NETDEV_A_QSTATS_IFINDEX, netdev->ifindex) ||
623 nla_put_u32(rsp, NETDEV_A_QSTATS_QUEUE_TYPE, q_type) ||
624 nla_put_u32(rsp, NETDEV_A_QSTATS_QUEUE_ID, i))
625 goto nla_put_failure;
627 switch (q_type) {
628 case NETDEV_QUEUE_TYPE_RX:
629 memset(&rx, 0xff, sizeof(rx));
630 ops->get_queue_stats_rx(netdev, i, &rx);
631 if (!memchr_inv(&rx, 0xff, sizeof(rx)))
632 goto nla_cancel;
633 if (netdev_nl_stats_write_rx(rsp, &rx))
634 goto nla_put_failure;
635 break;
636 case NETDEV_QUEUE_TYPE_TX:
637 memset(&tx, 0xff, sizeof(tx));
638 ops->get_queue_stats_tx(netdev, i, &tx);
639 if (!memchr_inv(&tx, 0xff, sizeof(tx)))
640 goto nla_cancel;
641 if (netdev_nl_stats_write_tx(rsp, &tx))
642 goto nla_put_failure;
643 break;
646 genlmsg_end(rsp, hdr);
647 return 0;
649 nla_cancel:
650 genlmsg_cancel(rsp, hdr);
651 return 0;
652 nla_put_failure:
653 genlmsg_cancel(rsp, hdr);
654 return -EMSGSIZE;
657 static int
658 netdev_nl_stats_by_queue(struct net_device *netdev, struct sk_buff *rsp,
659 const struct genl_info *info,
660 struct netdev_nl_dump_ctx *ctx)
662 const struct netdev_stat_ops *ops = netdev->stat_ops;
663 int i, err;
665 if (!(netdev->flags & IFF_UP))
666 return 0;
668 i = ctx->rxq_idx;
669 while (ops->get_queue_stats_rx && i < netdev->real_num_rx_queues) {
670 err = netdev_nl_stats_queue(netdev, rsp, NETDEV_QUEUE_TYPE_RX,
671 i, info);
672 if (err)
673 return err;
674 ctx->rxq_idx = i++;
676 i = ctx->txq_idx;
677 while (ops->get_queue_stats_tx && i < netdev->real_num_tx_queues) {
678 err = netdev_nl_stats_queue(netdev, rsp, NETDEV_QUEUE_TYPE_TX,
679 i, info);
680 if (err)
681 return err;
682 ctx->txq_idx = i++;
685 ctx->rxq_idx = 0;
686 ctx->txq_idx = 0;
687 return 0;
690 static int
691 netdev_nl_stats_by_netdev(struct net_device *netdev, struct sk_buff *rsp,
692 const struct genl_info *info)
694 struct netdev_queue_stats_rx rx_sum, rx;
695 struct netdev_queue_stats_tx tx_sum, tx;
696 const struct netdev_stat_ops *ops;
697 void *hdr;
698 int i;
700 ops = netdev->stat_ops;
701 /* Netdev can't guarantee any complete counters */
702 if (!ops->get_base_stats)
703 return 0;
705 memset(&rx_sum, 0xff, sizeof(rx_sum));
706 memset(&tx_sum, 0xff, sizeof(tx_sum));
708 ops->get_base_stats(netdev, &rx_sum, &tx_sum);
710 /* The op was there, but nothing reported, don't bother */
711 if (!memchr_inv(&rx_sum, 0xff, sizeof(rx_sum)) &&
712 !memchr_inv(&tx_sum, 0xff, sizeof(tx_sum)))
713 return 0;
715 hdr = genlmsg_iput(rsp, info);
716 if (!hdr)
717 return -EMSGSIZE;
718 if (nla_put_u32(rsp, NETDEV_A_QSTATS_IFINDEX, netdev->ifindex))
719 goto nla_put_failure;
721 for (i = 0; i < netdev->real_num_rx_queues; i++) {
722 memset(&rx, 0xff, sizeof(rx));
723 if (ops->get_queue_stats_rx)
724 ops->get_queue_stats_rx(netdev, i, &rx);
725 netdev_nl_stats_add(&rx_sum, &rx, sizeof(rx));
727 for (i = 0; i < netdev->real_num_tx_queues; i++) {
728 memset(&tx, 0xff, sizeof(tx));
729 if (ops->get_queue_stats_tx)
730 ops->get_queue_stats_tx(netdev, i, &tx);
731 netdev_nl_stats_add(&tx_sum, &tx, sizeof(tx));
734 if (netdev_nl_stats_write_rx(rsp, &rx_sum) ||
735 netdev_nl_stats_write_tx(rsp, &tx_sum))
736 goto nla_put_failure;
738 genlmsg_end(rsp, hdr);
739 return 0;
741 nla_put_failure:
742 genlmsg_cancel(rsp, hdr);
743 return -EMSGSIZE;
746 static int
747 netdev_nl_qstats_get_dump_one(struct net_device *netdev, unsigned int scope,
748 struct sk_buff *skb, const struct genl_info *info,
749 struct netdev_nl_dump_ctx *ctx)
751 if (!netdev->stat_ops)
752 return 0;
754 switch (scope) {
755 case 0:
756 return netdev_nl_stats_by_netdev(netdev, skb, info);
757 case NETDEV_QSTATS_SCOPE_QUEUE:
758 return netdev_nl_stats_by_queue(netdev, skb, info, ctx);
761 return -EINVAL; /* Should not happen, per netlink policy */
764 int netdev_nl_qstats_get_dumpit(struct sk_buff *skb,
765 struct netlink_callback *cb)
767 struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
768 const struct genl_info *info = genl_info_dump(cb);
769 struct net *net = sock_net(skb->sk);
770 struct net_device *netdev;
771 unsigned int ifindex;
772 unsigned int scope;
773 int err = 0;
775 scope = 0;
776 if (info->attrs[NETDEV_A_QSTATS_SCOPE])
777 scope = nla_get_uint(info->attrs[NETDEV_A_QSTATS_SCOPE]);
779 ifindex = 0;
780 if (info->attrs[NETDEV_A_QSTATS_IFINDEX])
781 ifindex = nla_get_u32(info->attrs[NETDEV_A_QSTATS_IFINDEX]);
783 rtnl_lock();
784 if (ifindex) {
785 netdev = __dev_get_by_index(net, ifindex);
786 if (netdev && netdev->stat_ops) {
787 err = netdev_nl_qstats_get_dump_one(netdev, scope, skb,
788 info, ctx);
789 } else {
790 NL_SET_BAD_ATTR(info->extack,
791 info->attrs[NETDEV_A_QSTATS_IFINDEX]);
792 err = netdev ? -EOPNOTSUPP : -ENODEV;
794 } else {
795 for_each_netdev_dump(net, netdev, ctx->ifindex) {
796 err = netdev_nl_qstats_get_dump_one(netdev, scope, skb,
797 info, ctx);
798 if (err < 0)
799 break;
802 rtnl_unlock();
804 return err;
807 int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info)
809 struct nlattr *tb[ARRAY_SIZE(netdev_queue_id_nl_policy)];
810 struct net_devmem_dmabuf_binding *binding;
811 struct list_head *sock_binding_list;
812 u32 ifindex, dmabuf_fd, rxq_idx;
813 struct net_device *netdev;
814 struct sk_buff *rsp;
815 struct nlattr *attr;
816 int rem, err = 0;
817 void *hdr;
819 if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_DEV_IFINDEX) ||
820 GENL_REQ_ATTR_CHECK(info, NETDEV_A_DMABUF_FD) ||
821 GENL_REQ_ATTR_CHECK(info, NETDEV_A_DMABUF_QUEUES))
822 return -EINVAL;
824 ifindex = nla_get_u32(info->attrs[NETDEV_A_DEV_IFINDEX]);
825 dmabuf_fd = nla_get_u32(info->attrs[NETDEV_A_DMABUF_FD]);
827 sock_binding_list = genl_sk_priv_get(&netdev_nl_family,
828 NETLINK_CB(skb).sk);
829 if (IS_ERR(sock_binding_list))
830 return PTR_ERR(sock_binding_list);
832 rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
833 if (!rsp)
834 return -ENOMEM;
836 hdr = genlmsg_iput(rsp, info);
837 if (!hdr) {
838 err = -EMSGSIZE;
839 goto err_genlmsg_free;
842 rtnl_lock();
844 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
845 if (!netdev || !netif_device_present(netdev)) {
846 err = -ENODEV;
847 goto err_unlock;
850 if (dev_xdp_prog_count(netdev)) {
851 NL_SET_ERR_MSG(info->extack, "unable to bind dmabuf to device with XDP program attached");
852 err = -EEXIST;
853 goto err_unlock;
856 binding = net_devmem_bind_dmabuf(netdev, dmabuf_fd, info->extack);
857 if (IS_ERR(binding)) {
858 err = PTR_ERR(binding);
859 goto err_unlock;
862 nla_for_each_attr_type(attr, NETDEV_A_DMABUF_QUEUES,
863 genlmsg_data(info->genlhdr),
864 genlmsg_len(info->genlhdr), rem) {
865 err = nla_parse_nested(
866 tb, ARRAY_SIZE(netdev_queue_id_nl_policy) - 1, attr,
867 netdev_queue_id_nl_policy, info->extack);
868 if (err < 0)
869 goto err_unbind;
871 if (NL_REQ_ATTR_CHECK(info->extack, attr, tb, NETDEV_A_QUEUE_ID) ||
872 NL_REQ_ATTR_CHECK(info->extack, attr, tb, NETDEV_A_QUEUE_TYPE)) {
873 err = -EINVAL;
874 goto err_unbind;
877 if (nla_get_u32(tb[NETDEV_A_QUEUE_TYPE]) != NETDEV_QUEUE_TYPE_RX) {
878 NL_SET_BAD_ATTR(info->extack, tb[NETDEV_A_QUEUE_TYPE]);
879 err = -EINVAL;
880 goto err_unbind;
883 rxq_idx = nla_get_u32(tb[NETDEV_A_QUEUE_ID]);
885 err = net_devmem_bind_dmabuf_to_queue(netdev, rxq_idx, binding,
886 info->extack);
887 if (err)
888 goto err_unbind;
891 list_add(&binding->list, sock_binding_list);
893 nla_put_u32(rsp, NETDEV_A_DMABUF_ID, binding->id);
894 genlmsg_end(rsp, hdr);
896 err = genlmsg_reply(rsp, info);
897 if (err)
898 goto err_unbind;
900 rtnl_unlock();
902 return 0;
904 err_unbind:
905 net_devmem_unbind_dmabuf(binding);
906 err_unlock:
907 rtnl_unlock();
908 err_genlmsg_free:
909 nlmsg_free(rsp);
910 return err;
913 void netdev_nl_sock_priv_init(struct list_head *priv)
915 INIT_LIST_HEAD(priv);
918 void netdev_nl_sock_priv_destroy(struct list_head *priv)
920 struct net_devmem_dmabuf_binding *binding;
921 struct net_devmem_dmabuf_binding *temp;
923 list_for_each_entry_safe(binding, temp, priv, list) {
924 rtnl_lock();
925 net_devmem_unbind_dmabuf(binding);
926 rtnl_unlock();
930 static int netdev_genl_netdevice_event(struct notifier_block *nb,
931 unsigned long event, void *ptr)
933 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
935 switch (event) {
936 case NETDEV_REGISTER:
937 netdev_genl_dev_notify(netdev, NETDEV_CMD_DEV_ADD_NTF);
938 break;
939 case NETDEV_UNREGISTER:
940 netdev_genl_dev_notify(netdev, NETDEV_CMD_DEV_DEL_NTF);
941 break;
942 case NETDEV_XDP_FEAT_CHANGE:
943 netdev_genl_dev_notify(netdev, NETDEV_CMD_DEV_CHANGE_NTF);
944 break;
947 return NOTIFY_OK;
950 static struct notifier_block netdev_genl_nb = {
951 .notifier_call = netdev_genl_netdevice_event,
954 static int __init netdev_genl_init(void)
956 int err;
958 err = register_netdevice_notifier(&netdev_genl_nb);
959 if (err)
960 return err;
962 err = genl_register_family(&netdev_nl_family);
963 if (err)
964 goto err_unreg_ntf;
966 return 0;
968 err_unreg_ntf:
969 unregister_netdevice_notifier(&netdev_genl_nb);
970 return err;
973 subsys_initcall(netdev_genl_init);