xref: /openbmc/linux/net/ethtool/ioctl.c (revision 55b24334)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * net/core/ethtool.c - Ethtool ioctl handler
4  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
5  *
6  * This file is where we call all the ethtool_ops commands to get
7  * the information ethtool needs.
8  */
9 
10 #include <linux/compat.h>
11 #include <linux/etherdevice.h>
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/capability.h>
15 #include <linux/errno.h>
16 #include <linux/ethtool.h>
17 #include <linux/netdevice.h>
18 #include <linux/net_tstamp.h>
19 #include <linux/phy.h>
20 #include <linux/bitops.h>
21 #include <linux/uaccess.h>
22 #include <linux/vmalloc.h>
23 #include <linux/sfp.h>
24 #include <linux/slab.h>
25 #include <linux/rtnetlink.h>
26 #include <linux/sched/signal.h>
27 #include <linux/net.h>
28 #include <linux/pm_runtime.h>
29 #include <net/devlink.h>
30 #include <net/ipv6.h>
31 #include <net/xdp_sock_drv.h>
32 #include <net/flow_offload.h>
33 #include <linux/ethtool_netlink.h>
34 #include <generated/utsrelease.h>
35 #include "common.h"
36 
37 /* State held across locks and calls for commands which have devlink fallback */
38 struct ethtool_devlink_compat {
39 	struct devlink *devlink;
40 	union {
41 		struct ethtool_flash efl;
42 		struct ethtool_drvinfo info;
43 	};
44 };
45 
46 static struct devlink *netdev_to_devlink_get(struct net_device *dev)
47 {
48 	if (!dev->devlink_port)
49 		return NULL;
50 	return devlink_try_get(dev->devlink_port->devlink);
51 }
52 
53 /*
54  * Some useful ethtool_ops methods that're device independent.
55  * If we find that all drivers want to do the same thing here,
56  * we can turn these into dev_() function calls.
57  */
58 
59 u32 ethtool_op_get_link(struct net_device *dev)
60 {
61 	return netif_carrier_ok(dev) ? 1 : 0;
62 }
63 EXPORT_SYMBOL(ethtool_op_get_link);
64 
65 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
66 {
67 	info->so_timestamping =
68 		SOF_TIMESTAMPING_TX_SOFTWARE |
69 		SOF_TIMESTAMPING_RX_SOFTWARE |
70 		SOF_TIMESTAMPING_SOFTWARE;
71 	info->phc_index = -1;
72 	return 0;
73 }
74 EXPORT_SYMBOL(ethtool_op_get_ts_info);
75 
76 /* Handlers for each ethtool command */
77 
78 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
79 {
80 	struct ethtool_gfeatures cmd = {
81 		.cmd = ETHTOOL_GFEATURES,
82 		.size = ETHTOOL_DEV_FEATURE_WORDS,
83 	};
84 	struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
85 	u32 __user *sizeaddr;
86 	u32 copy_size;
87 	int i;
88 
89 	/* in case feature bits run out again */
90 	BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
91 
92 	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
93 		features[i].available = (u32)(dev->hw_features >> (32 * i));
94 		features[i].requested = (u32)(dev->wanted_features >> (32 * i));
95 		features[i].active = (u32)(dev->features >> (32 * i));
96 		features[i].never_changed =
97 			(u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
98 	}
99 
100 	sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
101 	if (get_user(copy_size, sizeaddr))
102 		return -EFAULT;
103 
104 	if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
105 		copy_size = ETHTOOL_DEV_FEATURE_WORDS;
106 
107 	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
108 		return -EFAULT;
109 	useraddr += sizeof(cmd);
110 	if (copy_to_user(useraddr, features,
111 			 array_size(copy_size, sizeof(*features))))
112 		return -EFAULT;
113 
114 	return 0;
115 }
116 
117 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
118 {
119 	struct ethtool_sfeatures cmd;
120 	struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
121 	netdev_features_t wanted = 0, valid = 0;
122 	int i, ret = 0;
123 
124 	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
125 		return -EFAULT;
126 	useraddr += sizeof(cmd);
127 
128 	if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
129 		return -EINVAL;
130 
131 	if (copy_from_user(features, useraddr, sizeof(features)))
132 		return -EFAULT;
133 
134 	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
135 		valid |= (netdev_features_t)features[i].valid << (32 * i);
136 		wanted |= (netdev_features_t)features[i].requested << (32 * i);
137 	}
138 
139 	if (valid & ~NETIF_F_ETHTOOL_BITS)
140 		return -EINVAL;
141 
142 	if (valid & ~dev->hw_features) {
143 		valid &= dev->hw_features;
144 		ret |= ETHTOOL_F_UNSUPPORTED;
145 	}
146 
147 	dev->wanted_features &= ~valid;
148 	dev->wanted_features |= wanted & valid;
149 	__netdev_update_features(dev);
150 
151 	if ((dev->wanted_features ^ dev->features) & valid)
152 		ret |= ETHTOOL_F_WISH;
153 
154 	return ret;
155 }
156 
157 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
158 {
159 	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
160 	const struct ethtool_ops *ops = dev->ethtool_ops;
161 
162 	if (sset == ETH_SS_FEATURES)
163 		return ARRAY_SIZE(netdev_features_strings);
164 
165 	if (sset == ETH_SS_RSS_HASH_FUNCS)
166 		return ARRAY_SIZE(rss_hash_func_strings);
167 
168 	if (sset == ETH_SS_TUNABLES)
169 		return ARRAY_SIZE(tunable_strings);
170 
171 	if (sset == ETH_SS_PHY_TUNABLES)
172 		return ARRAY_SIZE(phy_tunable_strings);
173 
174 	if (sset == ETH_SS_PHY_STATS && dev->phydev &&
175 	    !ops->get_ethtool_phy_stats &&
176 	    phy_ops && phy_ops->get_sset_count)
177 		return phy_ops->get_sset_count(dev->phydev);
178 
179 	if (sset == ETH_SS_LINK_MODES)
180 		return __ETHTOOL_LINK_MODE_MASK_NBITS;
181 
182 	if (ops->get_sset_count && ops->get_strings)
183 		return ops->get_sset_count(dev, sset);
184 	else
185 		return -EOPNOTSUPP;
186 }
187 
188 static void __ethtool_get_strings(struct net_device *dev,
189 	u32 stringset, u8 *data)
190 {
191 	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
192 	const struct ethtool_ops *ops = dev->ethtool_ops;
193 
194 	if (stringset == ETH_SS_FEATURES)
195 		memcpy(data, netdev_features_strings,
196 			sizeof(netdev_features_strings));
197 	else if (stringset == ETH_SS_RSS_HASH_FUNCS)
198 		memcpy(data, rss_hash_func_strings,
199 		       sizeof(rss_hash_func_strings));
200 	else if (stringset == ETH_SS_TUNABLES)
201 		memcpy(data, tunable_strings, sizeof(tunable_strings));
202 	else if (stringset == ETH_SS_PHY_TUNABLES)
203 		memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
204 	else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
205 		 !ops->get_ethtool_phy_stats && phy_ops &&
206 		 phy_ops->get_strings)
207 		phy_ops->get_strings(dev->phydev, data);
208 	else if (stringset == ETH_SS_LINK_MODES)
209 		memcpy(data, link_mode_names,
210 		       __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
211 	else
212 		/* ops->get_strings is valid because checked earlier */
213 		ops->get_strings(dev, stringset, data);
214 }
215 
216 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
217 {
218 	/* feature masks of legacy discrete ethtool ops */
219 
220 	switch (eth_cmd) {
221 	case ETHTOOL_GTXCSUM:
222 	case ETHTOOL_STXCSUM:
223 		return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
224 		       NETIF_F_SCTP_CRC;
225 	case ETHTOOL_GRXCSUM:
226 	case ETHTOOL_SRXCSUM:
227 		return NETIF_F_RXCSUM;
228 	case ETHTOOL_GSG:
229 	case ETHTOOL_SSG:
230 		return NETIF_F_SG | NETIF_F_FRAGLIST;
231 	case ETHTOOL_GTSO:
232 	case ETHTOOL_STSO:
233 		return NETIF_F_ALL_TSO;
234 	case ETHTOOL_GGSO:
235 	case ETHTOOL_SGSO:
236 		return NETIF_F_GSO;
237 	case ETHTOOL_GGRO:
238 	case ETHTOOL_SGRO:
239 		return NETIF_F_GRO;
240 	default:
241 		BUG();
242 	}
243 }
244 
245 static int ethtool_get_one_feature(struct net_device *dev,
246 	char __user *useraddr, u32 ethcmd)
247 {
248 	netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
249 	struct ethtool_value edata = {
250 		.cmd = ethcmd,
251 		.data = !!(dev->features & mask),
252 	};
253 
254 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
255 		return -EFAULT;
256 	return 0;
257 }
258 
259 static int ethtool_set_one_feature(struct net_device *dev,
260 	void __user *useraddr, u32 ethcmd)
261 {
262 	struct ethtool_value edata;
263 	netdev_features_t mask;
264 
265 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
266 		return -EFAULT;
267 
268 	mask = ethtool_get_feature_mask(ethcmd);
269 	mask &= dev->hw_features;
270 	if (!mask)
271 		return -EOPNOTSUPP;
272 
273 	if (edata.data)
274 		dev->wanted_features |= mask;
275 	else
276 		dev->wanted_features &= ~mask;
277 
278 	__netdev_update_features(dev);
279 
280 	return 0;
281 }
282 
283 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
284 			  ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
285 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
286 			  NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
287 			  NETIF_F_RXHASH)
288 
289 static u32 __ethtool_get_flags(struct net_device *dev)
290 {
291 	u32 flags = 0;
292 
293 	if (dev->features & NETIF_F_LRO)
294 		flags |= ETH_FLAG_LRO;
295 	if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
296 		flags |= ETH_FLAG_RXVLAN;
297 	if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
298 		flags |= ETH_FLAG_TXVLAN;
299 	if (dev->features & NETIF_F_NTUPLE)
300 		flags |= ETH_FLAG_NTUPLE;
301 	if (dev->features & NETIF_F_RXHASH)
302 		flags |= ETH_FLAG_RXHASH;
303 
304 	return flags;
305 }
306 
307 static int __ethtool_set_flags(struct net_device *dev, u32 data)
308 {
309 	netdev_features_t features = 0, changed;
310 
311 	if (data & ~ETH_ALL_FLAGS)
312 		return -EINVAL;
313 
314 	if (data & ETH_FLAG_LRO)
315 		features |= NETIF_F_LRO;
316 	if (data & ETH_FLAG_RXVLAN)
317 		features |= NETIF_F_HW_VLAN_CTAG_RX;
318 	if (data & ETH_FLAG_TXVLAN)
319 		features |= NETIF_F_HW_VLAN_CTAG_TX;
320 	if (data & ETH_FLAG_NTUPLE)
321 		features |= NETIF_F_NTUPLE;
322 	if (data & ETH_FLAG_RXHASH)
323 		features |= NETIF_F_RXHASH;
324 
325 	/* allow changing only bits set in hw_features */
326 	changed = (features ^ dev->features) & ETH_ALL_FEATURES;
327 	if (changed & ~dev->hw_features)
328 		return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
329 
330 	dev->wanted_features =
331 		(dev->wanted_features & ~changed) | (features & changed);
332 
333 	__netdev_update_features(dev);
334 
335 	return 0;
336 }
337 
338 /* Given two link masks, AND them together and save the result in dst. */
339 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
340 				  struct ethtool_link_ksettings *src)
341 {
342 	unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
343 	unsigned int idx = 0;
344 
345 	for (; idx < size; idx++) {
346 		dst->link_modes.supported[idx] &=
347 			src->link_modes.supported[idx];
348 		dst->link_modes.advertising[idx] &=
349 			src->link_modes.advertising[idx];
350 	}
351 }
352 EXPORT_SYMBOL(ethtool_intersect_link_masks);
353 
354 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
355 					     u32 legacy_u32)
356 {
357 	linkmode_zero(dst);
358 	dst[0] = legacy_u32;
359 }
360 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
361 
362 /* return false if src had higher bits set. lower bits always updated. */
363 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
364 					     const unsigned long *src)
365 {
366 	*legacy_u32 = src[0];
367 	return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
368 		__ETHTOOL_LINK_MODE_MASK_NBITS;
369 }
370 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
371 
372 /* return false if ksettings link modes had higher bits
373  * set. legacy_settings always updated (best effort)
374  */
375 static bool
376 convert_link_ksettings_to_legacy_settings(
377 	struct ethtool_cmd *legacy_settings,
378 	const struct ethtool_link_ksettings *link_ksettings)
379 {
380 	bool retval = true;
381 
382 	memset(legacy_settings, 0, sizeof(*legacy_settings));
383 	/* this also clears the deprecated fields in legacy structure:
384 	 * __u8		transceiver;
385 	 * __u32	maxtxpkt;
386 	 * __u32	maxrxpkt;
387 	 */
388 
389 	retval &= ethtool_convert_link_mode_to_legacy_u32(
390 		&legacy_settings->supported,
391 		link_ksettings->link_modes.supported);
392 	retval &= ethtool_convert_link_mode_to_legacy_u32(
393 		&legacy_settings->advertising,
394 		link_ksettings->link_modes.advertising);
395 	retval &= ethtool_convert_link_mode_to_legacy_u32(
396 		&legacy_settings->lp_advertising,
397 		link_ksettings->link_modes.lp_advertising);
398 	ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
399 	legacy_settings->duplex
400 		= link_ksettings->base.duplex;
401 	legacy_settings->port
402 		= link_ksettings->base.port;
403 	legacy_settings->phy_address
404 		= link_ksettings->base.phy_address;
405 	legacy_settings->autoneg
406 		= link_ksettings->base.autoneg;
407 	legacy_settings->mdio_support
408 		= link_ksettings->base.mdio_support;
409 	legacy_settings->eth_tp_mdix
410 		= link_ksettings->base.eth_tp_mdix;
411 	legacy_settings->eth_tp_mdix_ctrl
412 		= link_ksettings->base.eth_tp_mdix_ctrl;
413 	legacy_settings->transceiver
414 		= link_ksettings->base.transceiver;
415 	return retval;
416 }
417 
418 /* number of 32-bit words to store the user's link mode bitmaps */
419 #define __ETHTOOL_LINK_MODE_MASK_NU32			\
420 	DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
421 
422 /* layout of the struct passed from/to userland */
423 struct ethtool_link_usettings {
424 	struct ethtool_link_settings base;
425 	struct {
426 		__u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
427 		__u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
428 		__u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
429 	} link_modes;
430 };
431 
432 /* Internal kernel helper to query a device ethtool_link_settings. */
433 int __ethtool_get_link_ksettings(struct net_device *dev,
434 				 struct ethtool_link_ksettings *link_ksettings)
435 {
436 	ASSERT_RTNL();
437 
438 	if (!dev->ethtool_ops->get_link_ksettings)
439 		return -EOPNOTSUPP;
440 
441 	memset(link_ksettings, 0, sizeof(*link_ksettings));
442 	return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
443 }
444 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
445 
446 /* convert ethtool_link_usettings in user space to a kernel internal
447  * ethtool_link_ksettings. return 0 on success, errno on error.
448  */
449 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
450 					 const void __user *from)
451 {
452 	struct ethtool_link_usettings link_usettings;
453 
454 	if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
455 		return -EFAULT;
456 
457 	memcpy(&to->base, &link_usettings.base, sizeof(to->base));
458 	bitmap_from_arr32(to->link_modes.supported,
459 			  link_usettings.link_modes.supported,
460 			  __ETHTOOL_LINK_MODE_MASK_NBITS);
461 	bitmap_from_arr32(to->link_modes.advertising,
462 			  link_usettings.link_modes.advertising,
463 			  __ETHTOOL_LINK_MODE_MASK_NBITS);
464 	bitmap_from_arr32(to->link_modes.lp_advertising,
465 			  link_usettings.link_modes.lp_advertising,
466 			  __ETHTOOL_LINK_MODE_MASK_NBITS);
467 
468 	return 0;
469 }
470 
471 /* Check if the user is trying to change anything besides speed/duplex */
472 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
473 {
474 	struct ethtool_link_settings base2 = {};
475 
476 	base2.speed = cmd->base.speed;
477 	base2.port = PORT_OTHER;
478 	base2.duplex = cmd->base.duplex;
479 	base2.cmd = cmd->base.cmd;
480 	base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
481 
482 	return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
483 		bitmap_empty(cmd->link_modes.supported,
484 			     __ETHTOOL_LINK_MODE_MASK_NBITS) &&
485 		bitmap_empty(cmd->link_modes.lp_advertising,
486 			     __ETHTOOL_LINK_MODE_MASK_NBITS);
487 }
488 
489 /* convert a kernel internal ethtool_link_ksettings to
490  * ethtool_link_usettings in user space. return 0 on success, errno on
491  * error.
492  */
493 static int
494 store_link_ksettings_for_user(void __user *to,
495 			      const struct ethtool_link_ksettings *from)
496 {
497 	struct ethtool_link_usettings link_usettings;
498 
499 	memcpy(&link_usettings, from, sizeof(link_usettings));
500 	bitmap_to_arr32(link_usettings.link_modes.supported,
501 			from->link_modes.supported,
502 			__ETHTOOL_LINK_MODE_MASK_NBITS);
503 	bitmap_to_arr32(link_usettings.link_modes.advertising,
504 			from->link_modes.advertising,
505 			__ETHTOOL_LINK_MODE_MASK_NBITS);
506 	bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
507 			from->link_modes.lp_advertising,
508 			__ETHTOOL_LINK_MODE_MASK_NBITS);
509 
510 	if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
511 		return -EFAULT;
512 
513 	return 0;
514 }
515 
516 /* Query device for its ethtool_link_settings. */
517 static int ethtool_get_link_ksettings(struct net_device *dev,
518 				      void __user *useraddr)
519 {
520 	int err = 0;
521 	struct ethtool_link_ksettings link_ksettings;
522 
523 	ASSERT_RTNL();
524 	if (!dev->ethtool_ops->get_link_ksettings)
525 		return -EOPNOTSUPP;
526 
527 	/* handle bitmap nbits handshake */
528 	if (copy_from_user(&link_ksettings.base, useraddr,
529 			   sizeof(link_ksettings.base)))
530 		return -EFAULT;
531 
532 	if (__ETHTOOL_LINK_MODE_MASK_NU32
533 	    != link_ksettings.base.link_mode_masks_nwords) {
534 		/* wrong link mode nbits requested */
535 		memset(&link_ksettings, 0, sizeof(link_ksettings));
536 		link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
537 		/* send back number of words required as negative val */
538 		compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
539 				   "need too many bits for link modes!");
540 		link_ksettings.base.link_mode_masks_nwords
541 			= -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
542 
543 		/* copy the base fields back to user, not the link
544 		 * mode bitmaps
545 		 */
546 		if (copy_to_user(useraddr, &link_ksettings.base,
547 				 sizeof(link_ksettings.base)))
548 			return -EFAULT;
549 
550 		return 0;
551 	}
552 
553 	/* handshake successful: user/kernel agree on
554 	 * link_mode_masks_nwords
555 	 */
556 
557 	memset(&link_ksettings, 0, sizeof(link_ksettings));
558 	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
559 	if (err < 0)
560 		return err;
561 
562 	/* make sure we tell the right values to user */
563 	link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
564 	link_ksettings.base.link_mode_masks_nwords
565 		= __ETHTOOL_LINK_MODE_MASK_NU32;
566 	link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
567 	link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
568 	link_ksettings.base.rate_matching = RATE_MATCH_NONE;
569 
570 	return store_link_ksettings_for_user(useraddr, &link_ksettings);
571 }
572 
573 /* Update device ethtool_link_settings. */
574 static int ethtool_set_link_ksettings(struct net_device *dev,
575 				      void __user *useraddr)
576 {
577 	struct ethtool_link_ksettings link_ksettings = {};
578 	int err;
579 
580 	ASSERT_RTNL();
581 
582 	if (!dev->ethtool_ops->set_link_ksettings)
583 		return -EOPNOTSUPP;
584 
585 	/* make sure nbits field has expected value */
586 	if (copy_from_user(&link_ksettings.base, useraddr,
587 			   sizeof(link_ksettings.base)))
588 		return -EFAULT;
589 
590 	if (__ETHTOOL_LINK_MODE_MASK_NU32
591 	    != link_ksettings.base.link_mode_masks_nwords)
592 		return -EINVAL;
593 
594 	/* copy the whole structure, now that we know it has expected
595 	 * format
596 	 */
597 	err = load_link_ksettings_from_user(&link_ksettings, useraddr);
598 	if (err)
599 		return err;
600 
601 	/* re-check nwords field, just in case */
602 	if (__ETHTOOL_LINK_MODE_MASK_NU32
603 	    != link_ksettings.base.link_mode_masks_nwords)
604 		return -EINVAL;
605 
606 	if (link_ksettings.base.master_slave_cfg ||
607 	    link_ksettings.base.master_slave_state)
608 		return -EINVAL;
609 
610 	err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
611 	if (err >= 0) {
612 		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
613 		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
614 	}
615 	return err;
616 }
617 
618 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
619 				       const struct ethtool_link_ksettings *cmd,
620 				       u32 *dev_speed, u8 *dev_duplex)
621 {
622 	u32 speed;
623 	u8 duplex;
624 
625 	speed = cmd->base.speed;
626 	duplex = cmd->base.duplex;
627 	/* don't allow custom speed and duplex */
628 	if (!ethtool_validate_speed(speed) ||
629 	    !ethtool_validate_duplex(duplex) ||
630 	    !ethtool_virtdev_validate_cmd(cmd))
631 		return -EINVAL;
632 	*dev_speed = speed;
633 	*dev_duplex = duplex;
634 
635 	return 0;
636 }
637 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
638 
639 /* Query device for its ethtool_cmd settings.
640  *
641  * Backward compatibility note: for compatibility with legacy ethtool, this is
642  * now implemented via get_link_ksettings. When driver reports higher link mode
643  * bits, a kernel warning is logged once (with name of 1st driver/device) to
644  * recommend user to upgrade ethtool, but the command is successful (only the
645  * lower link mode bits reported back to user). Deprecated fields from
646  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
647  */
648 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
649 {
650 	struct ethtool_link_ksettings link_ksettings;
651 	struct ethtool_cmd cmd;
652 	int err;
653 
654 	ASSERT_RTNL();
655 	if (!dev->ethtool_ops->get_link_ksettings)
656 		return -EOPNOTSUPP;
657 
658 	memset(&link_ksettings, 0, sizeof(link_ksettings));
659 	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
660 	if (err < 0)
661 		return err;
662 	convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
663 
664 	/* send a sensible cmd tag back to user */
665 	cmd.cmd = ETHTOOL_GSET;
666 
667 	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
668 		return -EFAULT;
669 
670 	return 0;
671 }
672 
673 /* Update device link settings with given ethtool_cmd.
674  *
675  * Backward compatibility note: for compatibility with legacy ethtool, this is
676  * now always implemented via set_link_settings. When user's request updates
677  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
678  * warning is logged once (with name of 1st driver/device) to recommend user to
679  * upgrade ethtool, and the request is rejected.
680  */
681 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
682 {
683 	struct ethtool_link_ksettings link_ksettings;
684 	struct ethtool_cmd cmd;
685 	int ret;
686 
687 	ASSERT_RTNL();
688 
689 	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
690 		return -EFAULT;
691 	if (!dev->ethtool_ops->set_link_ksettings)
692 		return -EOPNOTSUPP;
693 
694 	if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
695 		return -EINVAL;
696 	link_ksettings.base.link_mode_masks_nwords =
697 		__ETHTOOL_LINK_MODE_MASK_NU32;
698 	ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
699 	if (ret >= 0) {
700 		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
701 		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
702 	}
703 	return ret;
704 }
705 
706 static int
707 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
708 {
709 	const struct ethtool_ops *ops = dev->ethtool_ops;
710 	struct device *parent = dev->dev.parent;
711 
712 	rsp->info.cmd = ETHTOOL_GDRVINFO;
713 	strscpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
714 	if (ops->get_drvinfo) {
715 		ops->get_drvinfo(dev, &rsp->info);
716 		if (!rsp->info.bus_info[0] && parent)
717 			strscpy(rsp->info.bus_info, dev_name(parent),
718 				sizeof(rsp->info.bus_info));
719 		if (!rsp->info.driver[0] && parent && parent->driver)
720 			strscpy(rsp->info.driver, parent->driver->name,
721 				sizeof(rsp->info.driver));
722 	} else if (parent && parent->driver) {
723 		strscpy(rsp->info.bus_info, dev_name(parent),
724 			sizeof(rsp->info.bus_info));
725 		strscpy(rsp->info.driver, parent->driver->name,
726 			sizeof(rsp->info.driver));
727 	} else if (dev->rtnl_link_ops) {
728 		strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
729 			sizeof(rsp->info.driver));
730 	} else {
731 		return -EOPNOTSUPP;
732 	}
733 
734 	/*
735 	 * this method of obtaining string set info is deprecated;
736 	 * Use ETHTOOL_GSSET_INFO instead.
737 	 */
738 	if (ops->get_sset_count) {
739 		int rc;
740 
741 		rc = ops->get_sset_count(dev, ETH_SS_TEST);
742 		if (rc >= 0)
743 			rsp->info.testinfo_len = rc;
744 		rc = ops->get_sset_count(dev, ETH_SS_STATS);
745 		if (rc >= 0)
746 			rsp->info.n_stats = rc;
747 		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
748 		if (rc >= 0)
749 			rsp->info.n_priv_flags = rc;
750 	}
751 	if (ops->get_regs_len) {
752 		int ret = ops->get_regs_len(dev);
753 
754 		if (ret > 0)
755 			rsp->info.regdump_len = ret;
756 	}
757 
758 	if (ops->get_eeprom_len)
759 		rsp->info.eedump_len = ops->get_eeprom_len(dev);
760 
761 	if (!rsp->info.fw_version[0])
762 		rsp->devlink = netdev_to_devlink_get(dev);
763 
764 	return 0;
765 }
766 
767 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
768 						    void __user *useraddr)
769 {
770 	struct ethtool_sset_info info;
771 	u64 sset_mask;
772 	int i, idx = 0, n_bits = 0, ret, rc;
773 	u32 *info_buf = NULL;
774 
775 	if (copy_from_user(&info, useraddr, sizeof(info)))
776 		return -EFAULT;
777 
778 	/* store copy of mask, because we zero struct later on */
779 	sset_mask = info.sset_mask;
780 	if (!sset_mask)
781 		return 0;
782 
783 	/* calculate size of return buffer */
784 	n_bits = hweight64(sset_mask);
785 
786 	memset(&info, 0, sizeof(info));
787 	info.cmd = ETHTOOL_GSSET_INFO;
788 
789 	info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
790 	if (!info_buf)
791 		return -ENOMEM;
792 
793 	/*
794 	 * fill return buffer based on input bitmask and successful
795 	 * get_sset_count return
796 	 */
797 	for (i = 0; i < 64; i++) {
798 		if (!(sset_mask & (1ULL << i)))
799 			continue;
800 
801 		rc = __ethtool_get_sset_count(dev, i);
802 		if (rc >= 0) {
803 			info.sset_mask |= (1ULL << i);
804 			info_buf[idx++] = rc;
805 		}
806 	}
807 
808 	ret = -EFAULT;
809 	if (copy_to_user(useraddr, &info, sizeof(info)))
810 		goto out;
811 
812 	useraddr += offsetof(struct ethtool_sset_info, data);
813 	if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
814 		goto out;
815 
816 	ret = 0;
817 
818 out:
819 	kfree(info_buf);
820 	return ret;
821 }
822 
823 static noinline_for_stack int
824 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
825 			       const struct compat_ethtool_rxnfc __user *useraddr,
826 			       size_t size)
827 {
828 	struct compat_ethtool_rxnfc crxnfc = {};
829 
830 	/* We expect there to be holes between fs.m_ext and
831 	 * fs.ring_cookie and at the end of fs, but nowhere else.
832 	 * On non-x86, no conversion should be needed.
833 	 */
834 	BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
835 		     sizeof(struct compat_ethtool_rxnfc) !=
836 		     sizeof(struct ethtool_rxnfc));
837 	BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
838 		     sizeof(useraddr->fs.m_ext) !=
839 		     offsetof(struct ethtool_rxnfc, fs.m_ext) +
840 		     sizeof(rxnfc->fs.m_ext));
841 	BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
842 		     offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
843 		     offsetof(struct ethtool_rxnfc, fs.location) -
844 		     offsetof(struct ethtool_rxnfc, fs.ring_cookie));
845 
846 	if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
847 		return -EFAULT;
848 
849 	*rxnfc = (struct ethtool_rxnfc) {
850 		.cmd		= crxnfc.cmd,
851 		.flow_type	= crxnfc.flow_type,
852 		.data		= crxnfc.data,
853 		.fs		= {
854 			.flow_type	= crxnfc.fs.flow_type,
855 			.h_u		= crxnfc.fs.h_u,
856 			.h_ext		= crxnfc.fs.h_ext,
857 			.m_u		= crxnfc.fs.m_u,
858 			.m_ext		= crxnfc.fs.m_ext,
859 			.ring_cookie	= crxnfc.fs.ring_cookie,
860 			.location	= crxnfc.fs.location,
861 		},
862 		.rule_cnt	= crxnfc.rule_cnt,
863 	};
864 
865 	return 0;
866 }
867 
868 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
869 					const void __user *useraddr,
870 					size_t size)
871 {
872 	if (compat_need_64bit_alignment_fixup())
873 		return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
874 
875 	if (copy_from_user(rxnfc, useraddr, size))
876 		return -EFAULT;
877 
878 	return 0;
879 }
880 
881 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
882 					const struct ethtool_rxnfc *rxnfc,
883 					size_t size, const u32 *rule_buf)
884 {
885 	struct compat_ethtool_rxnfc crxnfc;
886 
887 	memset(&crxnfc, 0, sizeof(crxnfc));
888 	crxnfc = (struct compat_ethtool_rxnfc) {
889 		.cmd		= rxnfc->cmd,
890 		.flow_type	= rxnfc->flow_type,
891 		.data		= rxnfc->data,
892 		.fs		= {
893 			.flow_type	= rxnfc->fs.flow_type,
894 			.h_u		= rxnfc->fs.h_u,
895 			.h_ext		= rxnfc->fs.h_ext,
896 			.m_u		= rxnfc->fs.m_u,
897 			.m_ext		= rxnfc->fs.m_ext,
898 			.ring_cookie	= rxnfc->fs.ring_cookie,
899 			.location	= rxnfc->fs.location,
900 		},
901 		.rule_cnt	= rxnfc->rule_cnt,
902 	};
903 
904 	if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
905 		return -EFAULT;
906 
907 	return 0;
908 }
909 
910 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
911 				      const struct ethtool_rxnfc *rxnfc,
912 				      size_t size, const u32 *rule_buf)
913 {
914 	int ret;
915 
916 	if (compat_need_64bit_alignment_fixup()) {
917 		ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
918 						   rule_buf);
919 		useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
920 	} else {
921 		ret = copy_to_user(useraddr, rxnfc, size);
922 		useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
923 	}
924 
925 	if (ret)
926 		return -EFAULT;
927 
928 	if (rule_buf) {
929 		if (copy_to_user(useraddr, rule_buf,
930 				 rxnfc->rule_cnt * sizeof(u32)))
931 			return -EFAULT;
932 	}
933 
934 	return 0;
935 }
936 
937 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
938 						u32 cmd, void __user *useraddr)
939 {
940 	struct ethtool_rxnfc info;
941 	size_t info_size = sizeof(info);
942 	int rc;
943 
944 	if (!dev->ethtool_ops->set_rxnfc)
945 		return -EOPNOTSUPP;
946 
947 	/* struct ethtool_rxnfc was originally defined for
948 	 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
949 	 * members.  User-space might still be using that
950 	 * definition. */
951 	if (cmd == ETHTOOL_SRXFH)
952 		info_size = (offsetof(struct ethtool_rxnfc, data) +
953 			     sizeof(info.data));
954 
955 	if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
956 		return -EFAULT;
957 
958 	rc = dev->ethtool_ops->set_rxnfc(dev, &info);
959 	if (rc)
960 		return rc;
961 
962 	if (cmd == ETHTOOL_SRXCLSRLINS &&
963 	    ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
964 		return -EFAULT;
965 
966 	return 0;
967 }
968 
969 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
970 						u32 cmd, void __user *useraddr)
971 {
972 	struct ethtool_rxnfc info;
973 	size_t info_size = sizeof(info);
974 	const struct ethtool_ops *ops = dev->ethtool_ops;
975 	int ret;
976 	void *rule_buf = NULL;
977 
978 	if (!ops->get_rxnfc)
979 		return -EOPNOTSUPP;
980 
981 	/* struct ethtool_rxnfc was originally defined for
982 	 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
983 	 * members.  User-space might still be using that
984 	 * definition. */
985 	if (cmd == ETHTOOL_GRXFH)
986 		info_size = (offsetof(struct ethtool_rxnfc, data) +
987 			     sizeof(info.data));
988 
989 	if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
990 		return -EFAULT;
991 
992 	/* If FLOW_RSS was requested then user-space must be using the
993 	 * new definition, as FLOW_RSS is newer.
994 	 */
995 	if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
996 		info_size = sizeof(info);
997 		if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
998 			return -EFAULT;
999 		/* Since malicious users may modify the original data,
1000 		 * we need to check whether FLOW_RSS is still requested.
1001 		 */
1002 		if (!(info.flow_type & FLOW_RSS))
1003 			return -EINVAL;
1004 	}
1005 
1006 	if (info.cmd != cmd)
1007 		return -EINVAL;
1008 
1009 	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1010 		if (info.rule_cnt > 0) {
1011 			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1012 				rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1013 						   GFP_USER);
1014 			if (!rule_buf)
1015 				return -ENOMEM;
1016 		}
1017 	}
1018 
1019 	ret = ops->get_rxnfc(dev, &info, rule_buf);
1020 	if (ret < 0)
1021 		goto err_out;
1022 
1023 	ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1024 err_out:
1025 	kfree(rule_buf);
1026 
1027 	return ret;
1028 }
1029 
1030 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1031 					struct ethtool_rxnfc *rx_rings,
1032 					u32 size)
1033 {
1034 	int i;
1035 
1036 	if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1037 		return -EFAULT;
1038 
1039 	/* Validate ring indices */
1040 	for (i = 0; i < size; i++)
1041 		if (indir[i] >= rx_rings->data)
1042 			return -EINVAL;
1043 
1044 	return 0;
1045 }
1046 
1047 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1048 
1049 void netdev_rss_key_fill(void *buffer, size_t len)
1050 {
1051 	BUG_ON(len > sizeof(netdev_rss_key));
1052 	net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1053 	memcpy(buffer, netdev_rss_key, len);
1054 }
1055 EXPORT_SYMBOL(netdev_rss_key_fill);
1056 
1057 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1058 						     void __user *useraddr)
1059 {
1060 	u32 user_size, dev_size;
1061 	u32 *indir;
1062 	int ret;
1063 
1064 	if (!dev->ethtool_ops->get_rxfh_indir_size ||
1065 	    !dev->ethtool_ops->get_rxfh)
1066 		return -EOPNOTSUPP;
1067 	dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1068 	if (dev_size == 0)
1069 		return -EOPNOTSUPP;
1070 
1071 	if (copy_from_user(&user_size,
1072 			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1073 			   sizeof(user_size)))
1074 		return -EFAULT;
1075 
1076 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1077 			 &dev_size, sizeof(dev_size)))
1078 		return -EFAULT;
1079 
1080 	/* If the user buffer size is 0, this is just a query for the
1081 	 * device table size.  Otherwise, if it's smaller than the
1082 	 * device table size it's an error.
1083 	 */
1084 	if (user_size < dev_size)
1085 		return user_size == 0 ? 0 : -EINVAL;
1086 
1087 	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1088 	if (!indir)
1089 		return -ENOMEM;
1090 
1091 	ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1092 	if (ret)
1093 		goto out;
1094 
1095 	if (copy_to_user(useraddr +
1096 			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1097 			 indir, dev_size * sizeof(indir[0])))
1098 		ret = -EFAULT;
1099 
1100 out:
1101 	kfree(indir);
1102 	return ret;
1103 }
1104 
1105 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1106 						     void __user *useraddr)
1107 {
1108 	struct ethtool_rxnfc rx_rings;
1109 	u32 user_size, dev_size, i;
1110 	u32 *indir;
1111 	const struct ethtool_ops *ops = dev->ethtool_ops;
1112 	int ret;
1113 	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1114 
1115 	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1116 	    !ops->get_rxnfc)
1117 		return -EOPNOTSUPP;
1118 
1119 	dev_size = ops->get_rxfh_indir_size(dev);
1120 	if (dev_size == 0)
1121 		return -EOPNOTSUPP;
1122 
1123 	if (copy_from_user(&user_size,
1124 			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1125 			   sizeof(user_size)))
1126 		return -EFAULT;
1127 
1128 	if (user_size != 0 && user_size != dev_size)
1129 		return -EINVAL;
1130 
1131 	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1132 	if (!indir)
1133 		return -ENOMEM;
1134 
1135 	rx_rings.cmd = ETHTOOL_GRXRINGS;
1136 	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1137 	if (ret)
1138 		goto out;
1139 
1140 	if (user_size == 0) {
1141 		for (i = 0; i < dev_size; i++)
1142 			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1143 	} else {
1144 		ret = ethtool_copy_validate_indir(indir,
1145 						  useraddr + ringidx_offset,
1146 						  &rx_rings,
1147 						  dev_size);
1148 		if (ret)
1149 			goto out;
1150 	}
1151 
1152 	ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1153 	if (ret)
1154 		goto out;
1155 
1156 	/* indicate whether rxfh was set to default */
1157 	if (user_size == 0)
1158 		dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1159 	else
1160 		dev->priv_flags |= IFF_RXFH_CONFIGURED;
1161 
1162 out:
1163 	kfree(indir);
1164 	return ret;
1165 }
1166 
1167 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1168 					       void __user *useraddr)
1169 {
1170 	int ret;
1171 	const struct ethtool_ops *ops = dev->ethtool_ops;
1172 	u32 user_indir_size, user_key_size;
1173 	u32 dev_indir_size = 0, dev_key_size = 0;
1174 	struct ethtool_rxfh rxfh;
1175 	u32 total_size;
1176 	u32 indir_bytes;
1177 	u32 *indir = NULL;
1178 	u8 dev_hfunc = 0;
1179 	u8 *hkey = NULL;
1180 	u8 *rss_config;
1181 
1182 	if (!ops->get_rxfh)
1183 		return -EOPNOTSUPP;
1184 
1185 	if (ops->get_rxfh_indir_size)
1186 		dev_indir_size = ops->get_rxfh_indir_size(dev);
1187 	if (ops->get_rxfh_key_size)
1188 		dev_key_size = ops->get_rxfh_key_size(dev);
1189 
1190 	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1191 		return -EFAULT;
1192 	user_indir_size = rxfh.indir_size;
1193 	user_key_size = rxfh.key_size;
1194 
1195 	/* Check that reserved fields are 0 for now */
1196 	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1197 		return -EINVAL;
1198 	/* Most drivers don't handle rss_context, check it's 0 as well */
1199 	if (rxfh.rss_context && !ops->get_rxfh_context)
1200 		return -EOPNOTSUPP;
1201 
1202 	rxfh.indir_size = dev_indir_size;
1203 	rxfh.key_size = dev_key_size;
1204 	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1205 		return -EFAULT;
1206 
1207 	if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1208 	    (user_key_size && (user_key_size != dev_key_size)))
1209 		return -EINVAL;
1210 
1211 	indir_bytes = user_indir_size * sizeof(indir[0]);
1212 	total_size = indir_bytes + user_key_size;
1213 	rss_config = kzalloc(total_size, GFP_USER);
1214 	if (!rss_config)
1215 		return -ENOMEM;
1216 
1217 	if (user_indir_size)
1218 		indir = (u32 *)rss_config;
1219 
1220 	if (user_key_size)
1221 		hkey = rss_config + indir_bytes;
1222 
1223 	if (rxfh.rss_context)
1224 		ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1225 							 &dev_hfunc,
1226 							 rxfh.rss_context);
1227 	else
1228 		ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1229 	if (ret)
1230 		goto out;
1231 
1232 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1233 			 &dev_hfunc, sizeof(rxfh.hfunc))) {
1234 		ret = -EFAULT;
1235 	} else if (copy_to_user(useraddr +
1236 			      offsetof(struct ethtool_rxfh, rss_config[0]),
1237 			      rss_config, total_size)) {
1238 		ret = -EFAULT;
1239 	}
1240 out:
1241 	kfree(rss_config);
1242 
1243 	return ret;
1244 }
1245 
1246 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1247 					       void __user *useraddr)
1248 {
1249 	int ret;
1250 	const struct ethtool_ops *ops = dev->ethtool_ops;
1251 	struct ethtool_rxnfc rx_rings;
1252 	struct ethtool_rxfh rxfh;
1253 	u32 dev_indir_size = 0, dev_key_size = 0, i;
1254 	u32 *indir = NULL, indir_bytes = 0;
1255 	u8 *hkey = NULL;
1256 	u8 *rss_config;
1257 	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1258 	bool delete = false;
1259 
1260 	if (!ops->get_rxnfc || !ops->set_rxfh)
1261 		return -EOPNOTSUPP;
1262 
1263 	if (ops->get_rxfh_indir_size)
1264 		dev_indir_size = ops->get_rxfh_indir_size(dev);
1265 	if (ops->get_rxfh_key_size)
1266 		dev_key_size = ops->get_rxfh_key_size(dev);
1267 
1268 	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1269 		return -EFAULT;
1270 
1271 	/* Check that reserved fields are 0 for now */
1272 	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1273 		return -EINVAL;
1274 	/* Most drivers don't handle rss_context, check it's 0 as well */
1275 	if (rxfh.rss_context && !ops->set_rxfh_context)
1276 		return -EOPNOTSUPP;
1277 
1278 	/* If either indir, hash key or function is valid, proceed further.
1279 	 * Must request at least one change: indir size, hash key or function.
1280 	 */
1281 	if ((rxfh.indir_size &&
1282 	     rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1283 	     rxfh.indir_size != dev_indir_size) ||
1284 	    (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1285 	    (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1286 	     rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1287 		return -EINVAL;
1288 
1289 	if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1290 		indir_bytes = dev_indir_size * sizeof(indir[0]);
1291 
1292 	rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1293 	if (!rss_config)
1294 		return -ENOMEM;
1295 
1296 	rx_rings.cmd = ETHTOOL_GRXRINGS;
1297 	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1298 	if (ret)
1299 		goto out;
1300 
1301 	/* rxfh.indir_size == 0 means reset the indir table to default (master
1302 	 * context) or delete the context (other RSS contexts).
1303 	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1304 	 */
1305 	if (rxfh.indir_size &&
1306 	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1307 		indir = (u32 *)rss_config;
1308 		ret = ethtool_copy_validate_indir(indir,
1309 						  useraddr + rss_cfg_offset,
1310 						  &rx_rings,
1311 						  rxfh.indir_size);
1312 		if (ret)
1313 			goto out;
1314 	} else if (rxfh.indir_size == 0) {
1315 		if (rxfh.rss_context == 0) {
1316 			indir = (u32 *)rss_config;
1317 			for (i = 0; i < dev_indir_size; i++)
1318 				indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1319 		} else {
1320 			delete = true;
1321 		}
1322 	}
1323 
1324 	if (rxfh.key_size) {
1325 		hkey = rss_config + indir_bytes;
1326 		if (copy_from_user(hkey,
1327 				   useraddr + rss_cfg_offset + indir_bytes,
1328 				   rxfh.key_size)) {
1329 			ret = -EFAULT;
1330 			goto out;
1331 		}
1332 	}
1333 
1334 	if (rxfh.rss_context)
1335 		ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1336 					    &rxfh.rss_context, delete);
1337 	else
1338 		ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1339 	if (ret)
1340 		goto out;
1341 
1342 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1343 			 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1344 		ret = -EFAULT;
1345 
1346 	if (!rxfh.rss_context) {
1347 		/* indicate whether rxfh was set to default */
1348 		if (rxfh.indir_size == 0)
1349 			dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1350 		else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1351 			dev->priv_flags |= IFF_RXFH_CONFIGURED;
1352 	}
1353 
1354 out:
1355 	kfree(rss_config);
1356 	return ret;
1357 }
1358 
1359 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1360 {
1361 	struct ethtool_regs regs;
1362 	const struct ethtool_ops *ops = dev->ethtool_ops;
1363 	void *regbuf;
1364 	int reglen, ret;
1365 
1366 	if (!ops->get_regs || !ops->get_regs_len)
1367 		return -EOPNOTSUPP;
1368 
1369 	if (copy_from_user(&regs, useraddr, sizeof(regs)))
1370 		return -EFAULT;
1371 
1372 	reglen = ops->get_regs_len(dev);
1373 	if (reglen <= 0)
1374 		return reglen;
1375 
1376 	if (regs.len > reglen)
1377 		regs.len = reglen;
1378 
1379 	regbuf = vzalloc(reglen);
1380 	if (!regbuf)
1381 		return -ENOMEM;
1382 
1383 	if (regs.len < reglen)
1384 		reglen = regs.len;
1385 
1386 	ops->get_regs(dev, &regs, regbuf);
1387 
1388 	ret = -EFAULT;
1389 	if (copy_to_user(useraddr, &regs, sizeof(regs)))
1390 		goto out;
1391 	useraddr += offsetof(struct ethtool_regs, data);
1392 	if (copy_to_user(useraddr, regbuf, reglen))
1393 		goto out;
1394 	ret = 0;
1395 
1396  out:
1397 	vfree(regbuf);
1398 	return ret;
1399 }
1400 
1401 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1402 {
1403 	struct ethtool_value reset;
1404 	int ret;
1405 
1406 	if (!dev->ethtool_ops->reset)
1407 		return -EOPNOTSUPP;
1408 
1409 	if (copy_from_user(&reset, useraddr, sizeof(reset)))
1410 		return -EFAULT;
1411 
1412 	ret = dev->ethtool_ops->reset(dev, &reset.data);
1413 	if (ret)
1414 		return ret;
1415 
1416 	if (copy_to_user(useraddr, &reset, sizeof(reset)))
1417 		return -EFAULT;
1418 	return 0;
1419 }
1420 
1421 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1422 {
1423 	struct ethtool_wolinfo wol;
1424 
1425 	if (!dev->ethtool_ops->get_wol)
1426 		return -EOPNOTSUPP;
1427 
1428 	memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1429 	wol.cmd = ETHTOOL_GWOL;
1430 	dev->ethtool_ops->get_wol(dev, &wol);
1431 
1432 	if (copy_to_user(useraddr, &wol, sizeof(wol)))
1433 		return -EFAULT;
1434 	return 0;
1435 }
1436 
1437 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1438 {
1439 	struct ethtool_wolinfo wol, cur_wol;
1440 	int ret;
1441 
1442 	if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1443 		return -EOPNOTSUPP;
1444 
1445 	memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1446 	cur_wol.cmd = ETHTOOL_GWOL;
1447 	dev->ethtool_ops->get_wol(dev, &cur_wol);
1448 
1449 	if (copy_from_user(&wol, useraddr, sizeof(wol)))
1450 		return -EFAULT;
1451 
1452 	if (wol.wolopts & ~cur_wol.supported)
1453 		return -EINVAL;
1454 
1455 	if (wol.wolopts == cur_wol.wolopts)
1456 		return 0;
1457 
1458 	ret = dev->ethtool_ops->set_wol(dev, &wol);
1459 	if (ret)
1460 		return ret;
1461 
1462 	dev->wol_enabled = !!wol.wolopts;
1463 	ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1464 
1465 	return 0;
1466 }
1467 
1468 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1469 {
1470 	struct ethtool_eee edata;
1471 	int rc;
1472 
1473 	if (!dev->ethtool_ops->get_eee)
1474 		return -EOPNOTSUPP;
1475 
1476 	memset(&edata, 0, sizeof(struct ethtool_eee));
1477 	edata.cmd = ETHTOOL_GEEE;
1478 	rc = dev->ethtool_ops->get_eee(dev, &edata);
1479 
1480 	if (rc)
1481 		return rc;
1482 
1483 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1484 		return -EFAULT;
1485 
1486 	return 0;
1487 }
1488 
1489 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1490 {
1491 	struct ethtool_eee edata;
1492 	int ret;
1493 
1494 	if (!dev->ethtool_ops->set_eee)
1495 		return -EOPNOTSUPP;
1496 
1497 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
1498 		return -EFAULT;
1499 
1500 	ret = dev->ethtool_ops->set_eee(dev, &edata);
1501 	if (!ret)
1502 		ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1503 	return ret;
1504 }
1505 
1506 static int ethtool_nway_reset(struct net_device *dev)
1507 {
1508 	if (!dev->ethtool_ops->nway_reset)
1509 		return -EOPNOTSUPP;
1510 
1511 	return dev->ethtool_ops->nway_reset(dev);
1512 }
1513 
1514 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1515 {
1516 	struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1517 	int link = __ethtool_get_link(dev);
1518 
1519 	if (link < 0)
1520 		return link;
1521 
1522 	edata.data = link;
1523 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1524 		return -EFAULT;
1525 	return 0;
1526 }
1527 
1528 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1529 				  int (*getter)(struct net_device *,
1530 						struct ethtool_eeprom *, u8 *),
1531 				  u32 total_len)
1532 {
1533 	struct ethtool_eeprom eeprom;
1534 	void __user *userbuf = useraddr + sizeof(eeprom);
1535 	u32 bytes_remaining;
1536 	u8 *data;
1537 	int ret = 0;
1538 
1539 	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1540 		return -EFAULT;
1541 
1542 	/* Check for wrap and zero */
1543 	if (eeprom.offset + eeprom.len <= eeprom.offset)
1544 		return -EINVAL;
1545 
1546 	/* Check for exceeding total eeprom len */
1547 	if (eeprom.offset + eeprom.len > total_len)
1548 		return -EINVAL;
1549 
1550 	data = kzalloc(PAGE_SIZE, GFP_USER);
1551 	if (!data)
1552 		return -ENOMEM;
1553 
1554 	bytes_remaining = eeprom.len;
1555 	while (bytes_remaining > 0) {
1556 		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1557 
1558 		ret = getter(dev, &eeprom, data);
1559 		if (ret)
1560 			break;
1561 		if (!eeprom.len) {
1562 			ret = -EIO;
1563 			break;
1564 		}
1565 		if (copy_to_user(userbuf, data, eeprom.len)) {
1566 			ret = -EFAULT;
1567 			break;
1568 		}
1569 		userbuf += eeprom.len;
1570 		eeprom.offset += eeprom.len;
1571 		bytes_remaining -= eeprom.len;
1572 	}
1573 
1574 	eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1575 	eeprom.offset -= eeprom.len;
1576 	if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1577 		ret = -EFAULT;
1578 
1579 	kfree(data);
1580 	return ret;
1581 }
1582 
1583 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1584 {
1585 	const struct ethtool_ops *ops = dev->ethtool_ops;
1586 
1587 	if (!ops->get_eeprom || !ops->get_eeprom_len ||
1588 	    !ops->get_eeprom_len(dev))
1589 		return -EOPNOTSUPP;
1590 
1591 	return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1592 				      ops->get_eeprom_len(dev));
1593 }
1594 
1595 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1596 {
1597 	struct ethtool_eeprom eeprom;
1598 	const struct ethtool_ops *ops = dev->ethtool_ops;
1599 	void __user *userbuf = useraddr + sizeof(eeprom);
1600 	u32 bytes_remaining;
1601 	u8 *data;
1602 	int ret = 0;
1603 
1604 	if (!ops->set_eeprom || !ops->get_eeprom_len ||
1605 	    !ops->get_eeprom_len(dev))
1606 		return -EOPNOTSUPP;
1607 
1608 	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1609 		return -EFAULT;
1610 
1611 	/* Check for wrap and zero */
1612 	if (eeprom.offset + eeprom.len <= eeprom.offset)
1613 		return -EINVAL;
1614 
1615 	/* Check for exceeding total eeprom len */
1616 	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1617 		return -EINVAL;
1618 
1619 	data = kzalloc(PAGE_SIZE, GFP_USER);
1620 	if (!data)
1621 		return -ENOMEM;
1622 
1623 	bytes_remaining = eeprom.len;
1624 	while (bytes_remaining > 0) {
1625 		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1626 
1627 		if (copy_from_user(data, userbuf, eeprom.len)) {
1628 			ret = -EFAULT;
1629 			break;
1630 		}
1631 		ret = ops->set_eeprom(dev, &eeprom, data);
1632 		if (ret)
1633 			break;
1634 		userbuf += eeprom.len;
1635 		eeprom.offset += eeprom.len;
1636 		bytes_remaining -= eeprom.len;
1637 	}
1638 
1639 	kfree(data);
1640 	return ret;
1641 }
1642 
1643 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1644 						   void __user *useraddr)
1645 {
1646 	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1647 	struct kernel_ethtool_coalesce kernel_coalesce = {};
1648 	int ret;
1649 
1650 	if (!dev->ethtool_ops->get_coalesce)
1651 		return -EOPNOTSUPP;
1652 
1653 	ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1654 					     NULL);
1655 	if (ret)
1656 		return ret;
1657 
1658 	if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1659 		return -EFAULT;
1660 	return 0;
1661 }
1662 
1663 static bool
1664 ethtool_set_coalesce_supported(struct net_device *dev,
1665 			       struct ethtool_coalesce *coalesce)
1666 {
1667 	u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1668 	u32 nonzero_params = 0;
1669 
1670 	if (coalesce->rx_coalesce_usecs)
1671 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1672 	if (coalesce->rx_max_coalesced_frames)
1673 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1674 	if (coalesce->rx_coalesce_usecs_irq)
1675 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1676 	if (coalesce->rx_max_coalesced_frames_irq)
1677 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1678 	if (coalesce->tx_coalesce_usecs)
1679 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1680 	if (coalesce->tx_max_coalesced_frames)
1681 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1682 	if (coalesce->tx_coalesce_usecs_irq)
1683 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1684 	if (coalesce->tx_max_coalesced_frames_irq)
1685 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1686 	if (coalesce->stats_block_coalesce_usecs)
1687 		nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1688 	if (coalesce->use_adaptive_rx_coalesce)
1689 		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1690 	if (coalesce->use_adaptive_tx_coalesce)
1691 		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1692 	if (coalesce->pkt_rate_low)
1693 		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1694 	if (coalesce->rx_coalesce_usecs_low)
1695 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1696 	if (coalesce->rx_max_coalesced_frames_low)
1697 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1698 	if (coalesce->tx_coalesce_usecs_low)
1699 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1700 	if (coalesce->tx_max_coalesced_frames_low)
1701 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1702 	if (coalesce->pkt_rate_high)
1703 		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1704 	if (coalesce->rx_coalesce_usecs_high)
1705 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1706 	if (coalesce->rx_max_coalesced_frames_high)
1707 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1708 	if (coalesce->tx_coalesce_usecs_high)
1709 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1710 	if (coalesce->tx_max_coalesced_frames_high)
1711 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1712 	if (coalesce->rate_sample_interval)
1713 		nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1714 
1715 	return (supported_params & nonzero_params) == nonzero_params;
1716 }
1717 
1718 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1719 						   void __user *useraddr)
1720 {
1721 	struct kernel_ethtool_coalesce kernel_coalesce = {};
1722 	struct ethtool_coalesce coalesce;
1723 	int ret;
1724 
1725 	if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1726 		return -EOPNOTSUPP;
1727 
1728 	ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1729 					     NULL);
1730 	if (ret)
1731 		return ret;
1732 
1733 	if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1734 		return -EFAULT;
1735 
1736 	if (!ethtool_set_coalesce_supported(dev, &coalesce))
1737 		return -EOPNOTSUPP;
1738 
1739 	ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1740 					     NULL);
1741 	if (!ret)
1742 		ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1743 	return ret;
1744 }
1745 
1746 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1747 {
1748 	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1749 	struct kernel_ethtool_ringparam kernel_ringparam = {};
1750 
1751 	if (!dev->ethtool_ops->get_ringparam)
1752 		return -EOPNOTSUPP;
1753 
1754 	dev->ethtool_ops->get_ringparam(dev, &ringparam,
1755 					&kernel_ringparam, NULL);
1756 
1757 	if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1758 		return -EFAULT;
1759 	return 0;
1760 }
1761 
1762 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1763 {
1764 	struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1765 	struct kernel_ethtool_ringparam kernel_ringparam;
1766 	int ret;
1767 
1768 	if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1769 		return -EOPNOTSUPP;
1770 
1771 	if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1772 		return -EFAULT;
1773 
1774 	dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1775 
1776 	/* ensure new ring parameters are within the maximums */
1777 	if (ringparam.rx_pending > max.rx_max_pending ||
1778 	    ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1779 	    ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1780 	    ringparam.tx_pending > max.tx_max_pending)
1781 		return -EINVAL;
1782 
1783 	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1784 					      &kernel_ringparam, NULL);
1785 	if (!ret)
1786 		ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1787 	return ret;
1788 }
1789 
1790 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1791 						   void __user *useraddr)
1792 {
1793 	struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1794 
1795 	if (!dev->ethtool_ops->get_channels)
1796 		return -EOPNOTSUPP;
1797 
1798 	dev->ethtool_ops->get_channels(dev, &channels);
1799 
1800 	if (copy_to_user(useraddr, &channels, sizeof(channels)))
1801 		return -EFAULT;
1802 	return 0;
1803 }
1804 
1805 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1806 						   void __user *useraddr)
1807 {
1808 	struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1809 	u16 from_channel, to_channel;
1810 	u64 max_rxnfc_in_use;
1811 	u32 max_rxfh_in_use;
1812 	unsigned int i;
1813 	int ret;
1814 
1815 	if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1816 		return -EOPNOTSUPP;
1817 
1818 	if (copy_from_user(&channels, useraddr, sizeof(channels)))
1819 		return -EFAULT;
1820 
1821 	dev->ethtool_ops->get_channels(dev, &curr);
1822 
1823 	if (channels.rx_count == curr.rx_count &&
1824 	    channels.tx_count == curr.tx_count &&
1825 	    channels.combined_count == curr.combined_count &&
1826 	    channels.other_count == curr.other_count)
1827 		return 0;
1828 
1829 	/* ensure new counts are within the maximums */
1830 	if (channels.rx_count > curr.max_rx ||
1831 	    channels.tx_count > curr.max_tx ||
1832 	    channels.combined_count > curr.max_combined ||
1833 	    channels.other_count > curr.max_other)
1834 		return -EINVAL;
1835 
1836 	/* ensure there is at least one RX and one TX channel */
1837 	if (!channels.combined_count &&
1838 	    (!channels.rx_count || !channels.tx_count))
1839 		return -EINVAL;
1840 
1841 	/* ensure the new Rx count fits within the configured Rx flow
1842 	 * indirection table/rxnfc settings */
1843 	if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use))
1844 		max_rxnfc_in_use = 0;
1845 	if (!netif_is_rxfh_configured(dev) ||
1846 	    ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use))
1847 		max_rxfh_in_use = 0;
1848 	if (channels.combined_count + channels.rx_count <=
1849 	    max_t(u64, max_rxnfc_in_use, max_rxfh_in_use))
1850 		return -EINVAL;
1851 
1852 	/* Disabling channels, query zero-copy AF_XDP sockets */
1853 	from_channel = channels.combined_count +
1854 		min(channels.rx_count, channels.tx_count);
1855 	to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1856 	for (i = from_channel; i < to_channel; i++)
1857 		if (xsk_get_pool_from_qid(dev, i))
1858 			return -EINVAL;
1859 
1860 	ret = dev->ethtool_ops->set_channels(dev, &channels);
1861 	if (!ret)
1862 		ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1863 	return ret;
1864 }
1865 
1866 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1867 {
1868 	struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1869 
1870 	if (!dev->ethtool_ops->get_pauseparam)
1871 		return -EOPNOTSUPP;
1872 
1873 	dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1874 
1875 	if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1876 		return -EFAULT;
1877 	return 0;
1878 }
1879 
1880 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1881 {
1882 	struct ethtool_pauseparam pauseparam;
1883 	int ret;
1884 
1885 	if (!dev->ethtool_ops->set_pauseparam)
1886 		return -EOPNOTSUPP;
1887 
1888 	if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1889 		return -EFAULT;
1890 
1891 	ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1892 	if (!ret)
1893 		ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1894 	return ret;
1895 }
1896 
1897 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1898 {
1899 	struct ethtool_test test;
1900 	const struct ethtool_ops *ops = dev->ethtool_ops;
1901 	u64 *data;
1902 	int ret, test_len;
1903 
1904 	if (!ops->self_test || !ops->get_sset_count)
1905 		return -EOPNOTSUPP;
1906 
1907 	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1908 	if (test_len < 0)
1909 		return test_len;
1910 	WARN_ON(test_len == 0);
1911 
1912 	if (copy_from_user(&test, useraddr, sizeof(test)))
1913 		return -EFAULT;
1914 
1915 	test.len = test_len;
1916 	data = kcalloc(test_len, sizeof(u64), GFP_USER);
1917 	if (!data)
1918 		return -ENOMEM;
1919 
1920 	netif_testing_on(dev);
1921 	ops->self_test(dev, &test, data);
1922 	netif_testing_off(dev);
1923 
1924 	ret = -EFAULT;
1925 	if (copy_to_user(useraddr, &test, sizeof(test)))
1926 		goto out;
1927 	useraddr += sizeof(test);
1928 	if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
1929 		goto out;
1930 	ret = 0;
1931 
1932  out:
1933 	kfree(data);
1934 	return ret;
1935 }
1936 
1937 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1938 {
1939 	struct ethtool_gstrings gstrings;
1940 	u8 *data;
1941 	int ret;
1942 
1943 	if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1944 		return -EFAULT;
1945 
1946 	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1947 	if (ret < 0)
1948 		return ret;
1949 	if (ret > S32_MAX / ETH_GSTRING_LEN)
1950 		return -ENOMEM;
1951 	WARN_ON_ONCE(!ret);
1952 
1953 	gstrings.len = ret;
1954 
1955 	if (gstrings.len) {
1956 		data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1957 		if (!data)
1958 			return -ENOMEM;
1959 
1960 		__ethtool_get_strings(dev, gstrings.string_set, data);
1961 	} else {
1962 		data = NULL;
1963 	}
1964 
1965 	ret = -EFAULT;
1966 	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1967 		goto out;
1968 	useraddr += sizeof(gstrings);
1969 	if (gstrings.len &&
1970 	    copy_to_user(useraddr, data,
1971 			 array_size(gstrings.len, ETH_GSTRING_LEN)))
1972 		goto out;
1973 	ret = 0;
1974 
1975 out:
1976 	vfree(data);
1977 	return ret;
1978 }
1979 
1980 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
1981 {
1982 	va_list args;
1983 
1984 	va_start(args, fmt);
1985 	vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
1986 	va_end(args);
1987 
1988 	*data += ETH_GSTRING_LEN;
1989 }
1990 EXPORT_SYMBOL(ethtool_sprintf);
1991 
1992 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1993 {
1994 	struct ethtool_value id;
1995 	static bool busy;
1996 	const struct ethtool_ops *ops = dev->ethtool_ops;
1997 	netdevice_tracker dev_tracker;
1998 	int rc;
1999 
2000 	if (!ops->set_phys_id)
2001 		return -EOPNOTSUPP;
2002 
2003 	if (busy)
2004 		return -EBUSY;
2005 
2006 	if (copy_from_user(&id, useraddr, sizeof(id)))
2007 		return -EFAULT;
2008 
2009 	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2010 	if (rc < 0)
2011 		return rc;
2012 
2013 	/* Drop the RTNL lock while waiting, but prevent reentry or
2014 	 * removal of the device.
2015 	 */
2016 	busy = true;
2017 	netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2018 	rtnl_unlock();
2019 
2020 	if (rc == 0) {
2021 		/* Driver will handle this itself */
2022 		schedule_timeout_interruptible(
2023 			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2024 	} else {
2025 		/* Driver expects to be called at twice the frequency in rc */
2026 		int n = rc * 2, interval = HZ / n;
2027 		u64 count = mul_u32_u32(n, id.data);
2028 		u64 i = 0;
2029 
2030 		do {
2031 			rtnl_lock();
2032 			rc = ops->set_phys_id(dev,
2033 				    (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2034 			rtnl_unlock();
2035 			if (rc)
2036 				break;
2037 			schedule_timeout_interruptible(interval);
2038 		} while (!signal_pending(current) && (!id.data || i < count));
2039 	}
2040 
2041 	rtnl_lock();
2042 	netdev_put(dev, &dev_tracker);
2043 	busy = false;
2044 
2045 	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2046 	return rc;
2047 }
2048 
2049 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2050 {
2051 	struct ethtool_stats stats;
2052 	const struct ethtool_ops *ops = dev->ethtool_ops;
2053 	u64 *data;
2054 	int ret, n_stats;
2055 
2056 	if (!ops->get_ethtool_stats || !ops->get_sset_count)
2057 		return -EOPNOTSUPP;
2058 
2059 	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2060 	if (n_stats < 0)
2061 		return n_stats;
2062 	if (n_stats > S32_MAX / sizeof(u64))
2063 		return -ENOMEM;
2064 	WARN_ON_ONCE(!n_stats);
2065 	if (copy_from_user(&stats, useraddr, sizeof(stats)))
2066 		return -EFAULT;
2067 
2068 	stats.n_stats = n_stats;
2069 
2070 	if (n_stats) {
2071 		data = vzalloc(array_size(n_stats, sizeof(u64)));
2072 		if (!data)
2073 			return -ENOMEM;
2074 		ops->get_ethtool_stats(dev, &stats, data);
2075 	} else {
2076 		data = NULL;
2077 	}
2078 
2079 	ret = -EFAULT;
2080 	if (copy_to_user(useraddr, &stats, sizeof(stats)))
2081 		goto out;
2082 	useraddr += sizeof(stats);
2083 	if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2084 		goto out;
2085 	ret = 0;
2086 
2087  out:
2088 	vfree(data);
2089 	return ret;
2090 }
2091 
2092 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2093 {
2094 	if (n_stats < 0)
2095 		return n_stats;
2096 	if (n_stats > S32_MAX / sizeof(u64))
2097 		return -ENOMEM;
2098 	if (WARN_ON_ONCE(!n_stats))
2099 		return -EOPNOTSUPP;
2100 
2101 	*data = vzalloc(array_size(n_stats, sizeof(u64)));
2102 	if (!*data)
2103 		return -ENOMEM;
2104 
2105 	return 0;
2106 }
2107 
2108 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2109 					 struct ethtool_stats *stats,
2110 					 u64 **data)
2111  {
2112 	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2113 	int n_stats, ret;
2114 
2115 	if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2116 		return -EOPNOTSUPP;
2117 
2118 	n_stats = phy_ops->get_sset_count(phydev);
2119 
2120 	ret = ethtool_vzalloc_stats_array(n_stats, data);
2121 	if (ret)
2122 		return ret;
2123 
2124 	stats->n_stats = n_stats;
2125 	return phy_ops->get_stats(phydev, stats, *data);
2126 }
2127 
2128 static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2129 					  struct ethtool_stats *stats,
2130 					  u64 **data)
2131 {
2132 	const struct ethtool_ops *ops = dev->ethtool_ops;
2133 	int n_stats, ret;
2134 
2135 	if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats)
2136 		return -EOPNOTSUPP;
2137 
2138 	n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2139 
2140 	ret = ethtool_vzalloc_stats_array(n_stats, data);
2141 	if (ret)
2142 		return ret;
2143 
2144 	stats->n_stats = n_stats;
2145 	ops->get_ethtool_phy_stats(dev, stats, *data);
2146 
2147 	return 0;
2148 }
2149 
2150 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2151 {
2152 	struct phy_device *phydev = dev->phydev;
2153 	struct ethtool_stats stats;
2154 	u64 *data = NULL;
2155 	int ret = -EOPNOTSUPP;
2156 
2157 	if (copy_from_user(&stats, useraddr, sizeof(stats)))
2158 		return -EFAULT;
2159 
2160 	if (phydev)
2161 		ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2162 
2163 	if (ret == -EOPNOTSUPP)
2164 		ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2165 
2166 	if (ret)
2167 		goto out;
2168 
2169 	if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2170 		ret = -EFAULT;
2171 		goto out;
2172 	}
2173 
2174 	useraddr += sizeof(stats);
2175 	if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2176 		ret = -EFAULT;
2177 
2178  out:
2179 	vfree(data);
2180 	return ret;
2181 }
2182 
2183 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2184 {
2185 	struct ethtool_perm_addr epaddr;
2186 
2187 	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2188 		return -EFAULT;
2189 
2190 	if (epaddr.size < dev->addr_len)
2191 		return -ETOOSMALL;
2192 	epaddr.size = dev->addr_len;
2193 
2194 	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2195 		return -EFAULT;
2196 	useraddr += sizeof(epaddr);
2197 	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2198 		return -EFAULT;
2199 	return 0;
2200 }
2201 
2202 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2203 			     u32 cmd, u32 (*actor)(struct net_device *))
2204 {
2205 	struct ethtool_value edata = { .cmd = cmd };
2206 
2207 	if (!actor)
2208 		return -EOPNOTSUPP;
2209 
2210 	edata.data = actor(dev);
2211 
2212 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
2213 		return -EFAULT;
2214 	return 0;
2215 }
2216 
2217 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2218 			     void (*actor)(struct net_device *, u32))
2219 {
2220 	struct ethtool_value edata;
2221 
2222 	if (!actor)
2223 		return -EOPNOTSUPP;
2224 
2225 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
2226 		return -EFAULT;
2227 
2228 	actor(dev, edata.data);
2229 	return 0;
2230 }
2231 
2232 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2233 			     int (*actor)(struct net_device *, u32))
2234 {
2235 	struct ethtool_value edata;
2236 
2237 	if (!actor)
2238 		return -EOPNOTSUPP;
2239 
2240 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
2241 		return -EFAULT;
2242 
2243 	return actor(dev, edata.data);
2244 }
2245 
2246 static int
2247 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2248 {
2249 	if (!dev->ethtool_ops->flash_device) {
2250 		req->devlink = netdev_to_devlink_get(dev);
2251 		return 0;
2252 	}
2253 
2254 	return dev->ethtool_ops->flash_device(dev, &req->efl);
2255 }
2256 
2257 static int ethtool_set_dump(struct net_device *dev,
2258 			void __user *useraddr)
2259 {
2260 	struct ethtool_dump dump;
2261 
2262 	if (!dev->ethtool_ops->set_dump)
2263 		return -EOPNOTSUPP;
2264 
2265 	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2266 		return -EFAULT;
2267 
2268 	return dev->ethtool_ops->set_dump(dev, &dump);
2269 }
2270 
2271 static int ethtool_get_dump_flag(struct net_device *dev,
2272 				void __user *useraddr)
2273 {
2274 	int ret;
2275 	struct ethtool_dump dump;
2276 	const struct ethtool_ops *ops = dev->ethtool_ops;
2277 
2278 	if (!ops->get_dump_flag)
2279 		return -EOPNOTSUPP;
2280 
2281 	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2282 		return -EFAULT;
2283 
2284 	ret = ops->get_dump_flag(dev, &dump);
2285 	if (ret)
2286 		return ret;
2287 
2288 	if (copy_to_user(useraddr, &dump, sizeof(dump)))
2289 		return -EFAULT;
2290 	return 0;
2291 }
2292 
2293 static int ethtool_get_dump_data(struct net_device *dev,
2294 				void __user *useraddr)
2295 {
2296 	int ret;
2297 	__u32 len;
2298 	struct ethtool_dump dump, tmp;
2299 	const struct ethtool_ops *ops = dev->ethtool_ops;
2300 	void *data = NULL;
2301 
2302 	if (!ops->get_dump_data || !ops->get_dump_flag)
2303 		return -EOPNOTSUPP;
2304 
2305 	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2306 		return -EFAULT;
2307 
2308 	memset(&tmp, 0, sizeof(tmp));
2309 	tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2310 	ret = ops->get_dump_flag(dev, &tmp);
2311 	if (ret)
2312 		return ret;
2313 
2314 	len = min(tmp.len, dump.len);
2315 	if (!len)
2316 		return -EFAULT;
2317 
2318 	/* Don't ever let the driver think there's more space available
2319 	 * than it requested with .get_dump_flag().
2320 	 */
2321 	dump.len = len;
2322 
2323 	/* Always allocate enough space to hold the whole thing so that the
2324 	 * driver does not need to check the length and bother with partial
2325 	 * dumping.
2326 	 */
2327 	data = vzalloc(tmp.len);
2328 	if (!data)
2329 		return -ENOMEM;
2330 	ret = ops->get_dump_data(dev, &dump, data);
2331 	if (ret)
2332 		goto out;
2333 
2334 	/* There are two sane possibilities:
2335 	 * 1. The driver's .get_dump_data() does not touch dump.len.
2336 	 * 2. Or it may set dump.len to how much it really writes, which
2337 	 *    should be tmp.len (or len if it can do a partial dump).
2338 	 * In any case respond to userspace with the actual length of data
2339 	 * it's receiving.
2340 	 */
2341 	WARN_ON(dump.len != len && dump.len != tmp.len);
2342 	dump.len = len;
2343 
2344 	if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2345 		ret = -EFAULT;
2346 		goto out;
2347 	}
2348 	useraddr += offsetof(struct ethtool_dump, data);
2349 	if (copy_to_user(useraddr, data, len))
2350 		ret = -EFAULT;
2351 out:
2352 	vfree(data);
2353 	return ret;
2354 }
2355 
2356 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2357 {
2358 	struct ethtool_ts_info info;
2359 	int err;
2360 
2361 	err = __ethtool_get_ts_info(dev, &info);
2362 	if (err)
2363 		return err;
2364 
2365 	if (copy_to_user(useraddr, &info, sizeof(info)))
2366 		return -EFAULT;
2367 
2368 	return 0;
2369 }
2370 
2371 int ethtool_get_module_info_call(struct net_device *dev,
2372 				 struct ethtool_modinfo *modinfo)
2373 {
2374 	const struct ethtool_ops *ops = dev->ethtool_ops;
2375 	struct phy_device *phydev = dev->phydev;
2376 
2377 	if (dev->sfp_bus)
2378 		return sfp_get_module_info(dev->sfp_bus, modinfo);
2379 
2380 	if (phydev && phydev->drv && phydev->drv->module_info)
2381 		return phydev->drv->module_info(phydev, modinfo);
2382 
2383 	if (ops->get_module_info)
2384 		return ops->get_module_info(dev, modinfo);
2385 
2386 	return -EOPNOTSUPP;
2387 }
2388 
2389 static int ethtool_get_module_info(struct net_device *dev,
2390 				   void __user *useraddr)
2391 {
2392 	int ret;
2393 	struct ethtool_modinfo modinfo;
2394 
2395 	if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2396 		return -EFAULT;
2397 
2398 	ret = ethtool_get_module_info_call(dev, &modinfo);
2399 	if (ret)
2400 		return ret;
2401 
2402 	if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2403 		return -EFAULT;
2404 
2405 	return 0;
2406 }
2407 
2408 int ethtool_get_module_eeprom_call(struct net_device *dev,
2409 				   struct ethtool_eeprom *ee, u8 *data)
2410 {
2411 	const struct ethtool_ops *ops = dev->ethtool_ops;
2412 	struct phy_device *phydev = dev->phydev;
2413 
2414 	if (dev->sfp_bus)
2415 		return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2416 
2417 	if (phydev && phydev->drv && phydev->drv->module_eeprom)
2418 		return phydev->drv->module_eeprom(phydev, ee, data);
2419 
2420 	if (ops->get_module_eeprom)
2421 		return ops->get_module_eeprom(dev, ee, data);
2422 
2423 	return -EOPNOTSUPP;
2424 }
2425 
2426 static int ethtool_get_module_eeprom(struct net_device *dev,
2427 				     void __user *useraddr)
2428 {
2429 	int ret;
2430 	struct ethtool_modinfo modinfo;
2431 
2432 	ret = ethtool_get_module_info_call(dev, &modinfo);
2433 	if (ret)
2434 		return ret;
2435 
2436 	return ethtool_get_any_eeprom(dev, useraddr,
2437 				      ethtool_get_module_eeprom_call,
2438 				      modinfo.eeprom_len);
2439 }
2440 
2441 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2442 {
2443 	switch (tuna->id) {
2444 	case ETHTOOL_RX_COPYBREAK:
2445 	case ETHTOOL_TX_COPYBREAK:
2446 	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2447 		if (tuna->len != sizeof(u32) ||
2448 		    tuna->type_id != ETHTOOL_TUNABLE_U32)
2449 			return -EINVAL;
2450 		break;
2451 	case ETHTOOL_PFC_PREVENTION_TOUT:
2452 		if (tuna->len != sizeof(u16) ||
2453 		    tuna->type_id != ETHTOOL_TUNABLE_U16)
2454 			return -EINVAL;
2455 		break;
2456 	default:
2457 		return -EINVAL;
2458 	}
2459 
2460 	return 0;
2461 }
2462 
2463 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2464 {
2465 	int ret;
2466 	struct ethtool_tunable tuna;
2467 	const struct ethtool_ops *ops = dev->ethtool_ops;
2468 	void *data;
2469 
2470 	if (!ops->get_tunable)
2471 		return -EOPNOTSUPP;
2472 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2473 		return -EFAULT;
2474 	ret = ethtool_tunable_valid(&tuna);
2475 	if (ret)
2476 		return ret;
2477 	data = kzalloc(tuna.len, GFP_USER);
2478 	if (!data)
2479 		return -ENOMEM;
2480 	ret = ops->get_tunable(dev, &tuna, data);
2481 	if (ret)
2482 		goto out;
2483 	useraddr += sizeof(tuna);
2484 	ret = -EFAULT;
2485 	if (copy_to_user(useraddr, data, tuna.len))
2486 		goto out;
2487 	ret = 0;
2488 
2489 out:
2490 	kfree(data);
2491 	return ret;
2492 }
2493 
2494 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2495 {
2496 	int ret;
2497 	struct ethtool_tunable tuna;
2498 	const struct ethtool_ops *ops = dev->ethtool_ops;
2499 	void *data;
2500 
2501 	if (!ops->set_tunable)
2502 		return -EOPNOTSUPP;
2503 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2504 		return -EFAULT;
2505 	ret = ethtool_tunable_valid(&tuna);
2506 	if (ret)
2507 		return ret;
2508 	useraddr += sizeof(tuna);
2509 	data = memdup_user(useraddr, tuna.len);
2510 	if (IS_ERR(data))
2511 		return PTR_ERR(data);
2512 	ret = ops->set_tunable(dev, &tuna, data);
2513 
2514 	kfree(data);
2515 	return ret;
2516 }
2517 
2518 static noinline_for_stack int
2519 ethtool_get_per_queue_coalesce(struct net_device *dev,
2520 			       void __user *useraddr,
2521 			       struct ethtool_per_queue_op *per_queue_opt)
2522 {
2523 	u32 bit;
2524 	int ret;
2525 	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2526 
2527 	if (!dev->ethtool_ops->get_per_queue_coalesce)
2528 		return -EOPNOTSUPP;
2529 
2530 	useraddr += sizeof(*per_queue_opt);
2531 
2532 	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2533 			  MAX_NUM_QUEUE);
2534 
2535 	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2536 		struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2537 
2538 		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2539 		if (ret != 0)
2540 			return ret;
2541 		if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2542 			return -EFAULT;
2543 		useraddr += sizeof(coalesce);
2544 	}
2545 
2546 	return 0;
2547 }
2548 
2549 static noinline_for_stack int
2550 ethtool_set_per_queue_coalesce(struct net_device *dev,
2551 			       void __user *useraddr,
2552 			       struct ethtool_per_queue_op *per_queue_opt)
2553 {
2554 	u32 bit;
2555 	int i, ret = 0;
2556 	int n_queue;
2557 	struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2558 	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2559 
2560 	if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2561 	    (!dev->ethtool_ops->get_per_queue_coalesce))
2562 		return -EOPNOTSUPP;
2563 
2564 	useraddr += sizeof(*per_queue_opt);
2565 
2566 	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2567 	n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2568 	tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2569 	if (!backup)
2570 		return -ENOMEM;
2571 
2572 	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2573 		struct ethtool_coalesce coalesce;
2574 
2575 		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2576 		if (ret != 0)
2577 			goto roll_back;
2578 
2579 		tmp++;
2580 
2581 		if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2582 			ret = -EFAULT;
2583 			goto roll_back;
2584 		}
2585 
2586 		if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2587 			ret = -EOPNOTSUPP;
2588 			goto roll_back;
2589 		}
2590 
2591 		ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2592 		if (ret != 0)
2593 			goto roll_back;
2594 
2595 		useraddr += sizeof(coalesce);
2596 	}
2597 
2598 roll_back:
2599 	if (ret != 0) {
2600 		tmp = backup;
2601 		for_each_set_bit(i, queue_mask, bit) {
2602 			dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2603 			tmp++;
2604 		}
2605 	}
2606 	kfree(backup);
2607 
2608 	return ret;
2609 }
2610 
2611 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2612 				 void __user *useraddr, u32 sub_cmd)
2613 {
2614 	struct ethtool_per_queue_op per_queue_opt;
2615 
2616 	if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2617 		return -EFAULT;
2618 
2619 	if (per_queue_opt.sub_command != sub_cmd)
2620 		return -EINVAL;
2621 
2622 	switch (per_queue_opt.sub_command) {
2623 	case ETHTOOL_GCOALESCE:
2624 		return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2625 	case ETHTOOL_SCOALESCE:
2626 		return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2627 	default:
2628 		return -EOPNOTSUPP;
2629 	}
2630 }
2631 
2632 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2633 {
2634 	switch (tuna->id) {
2635 	case ETHTOOL_PHY_DOWNSHIFT:
2636 	case ETHTOOL_PHY_FAST_LINK_DOWN:
2637 		if (tuna->len != sizeof(u8) ||
2638 		    tuna->type_id != ETHTOOL_TUNABLE_U8)
2639 			return -EINVAL;
2640 		break;
2641 	case ETHTOOL_PHY_EDPD:
2642 		if (tuna->len != sizeof(u16) ||
2643 		    tuna->type_id != ETHTOOL_TUNABLE_U16)
2644 			return -EINVAL;
2645 		break;
2646 	default:
2647 		return -EINVAL;
2648 	}
2649 
2650 	return 0;
2651 }
2652 
2653 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2654 {
2655 	struct phy_device *phydev = dev->phydev;
2656 	struct ethtool_tunable tuna;
2657 	bool phy_drv_tunable;
2658 	void *data;
2659 	int ret;
2660 
2661 	phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2662 	if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2663 		return -EOPNOTSUPP;
2664 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2665 		return -EFAULT;
2666 	ret = ethtool_phy_tunable_valid(&tuna);
2667 	if (ret)
2668 		return ret;
2669 	data = kzalloc(tuna.len, GFP_USER);
2670 	if (!data)
2671 		return -ENOMEM;
2672 	if (phy_drv_tunable) {
2673 		mutex_lock(&phydev->lock);
2674 		ret = phydev->drv->get_tunable(phydev, &tuna, data);
2675 		mutex_unlock(&phydev->lock);
2676 	} else {
2677 		ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2678 	}
2679 	if (ret)
2680 		goto out;
2681 	useraddr += sizeof(tuna);
2682 	ret = -EFAULT;
2683 	if (copy_to_user(useraddr, data, tuna.len))
2684 		goto out;
2685 	ret = 0;
2686 
2687 out:
2688 	kfree(data);
2689 	return ret;
2690 }
2691 
2692 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2693 {
2694 	struct phy_device *phydev = dev->phydev;
2695 	struct ethtool_tunable tuna;
2696 	bool phy_drv_tunable;
2697 	void *data;
2698 	int ret;
2699 
2700 	phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2701 	if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2702 		return -EOPNOTSUPP;
2703 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2704 		return -EFAULT;
2705 	ret = ethtool_phy_tunable_valid(&tuna);
2706 	if (ret)
2707 		return ret;
2708 	useraddr += sizeof(tuna);
2709 	data = memdup_user(useraddr, tuna.len);
2710 	if (IS_ERR(data))
2711 		return PTR_ERR(data);
2712 	if (phy_drv_tunable) {
2713 		mutex_lock(&phydev->lock);
2714 		ret = phydev->drv->set_tunable(phydev, &tuna, data);
2715 		mutex_unlock(&phydev->lock);
2716 	} else {
2717 		ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2718 	}
2719 
2720 	kfree(data);
2721 	return ret;
2722 }
2723 
2724 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2725 {
2726 	struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2727 	int rc;
2728 
2729 	if (!dev->ethtool_ops->get_fecparam)
2730 		return -EOPNOTSUPP;
2731 
2732 	rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2733 	if (rc)
2734 		return rc;
2735 
2736 	if (WARN_ON_ONCE(fecparam.reserved))
2737 		fecparam.reserved = 0;
2738 
2739 	if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2740 		return -EFAULT;
2741 	return 0;
2742 }
2743 
2744 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2745 {
2746 	struct ethtool_fecparam fecparam;
2747 
2748 	if (!dev->ethtool_ops->set_fecparam)
2749 		return -EOPNOTSUPP;
2750 
2751 	if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2752 		return -EFAULT;
2753 
2754 	if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2755 		return -EINVAL;
2756 
2757 	fecparam.active_fec = 0;
2758 	fecparam.reserved = 0;
2759 
2760 	return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2761 }
2762 
2763 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2764 
2765 static int
2766 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2767 	      u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2768 {
2769 	struct net_device *dev;
2770 	u32 sub_cmd;
2771 	int rc;
2772 	netdev_features_t old_features;
2773 
2774 	dev = __dev_get_by_name(net, ifr->ifr_name);
2775 	if (!dev)
2776 		return -ENODEV;
2777 
2778 	if (ethcmd == ETHTOOL_PERQUEUE) {
2779 		if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2780 			return -EFAULT;
2781 	} else {
2782 		sub_cmd = ethcmd;
2783 	}
2784 	/* Allow some commands to be done by anyone */
2785 	switch (sub_cmd) {
2786 	case ETHTOOL_GSET:
2787 	case ETHTOOL_GDRVINFO:
2788 	case ETHTOOL_GMSGLVL:
2789 	case ETHTOOL_GLINK:
2790 	case ETHTOOL_GCOALESCE:
2791 	case ETHTOOL_GRINGPARAM:
2792 	case ETHTOOL_GPAUSEPARAM:
2793 	case ETHTOOL_GRXCSUM:
2794 	case ETHTOOL_GTXCSUM:
2795 	case ETHTOOL_GSG:
2796 	case ETHTOOL_GSSET_INFO:
2797 	case ETHTOOL_GSTRINGS:
2798 	case ETHTOOL_GSTATS:
2799 	case ETHTOOL_GPHYSTATS:
2800 	case ETHTOOL_GTSO:
2801 	case ETHTOOL_GPERMADDR:
2802 	case ETHTOOL_GUFO:
2803 	case ETHTOOL_GGSO:
2804 	case ETHTOOL_GGRO:
2805 	case ETHTOOL_GFLAGS:
2806 	case ETHTOOL_GPFLAGS:
2807 	case ETHTOOL_GRXFH:
2808 	case ETHTOOL_GRXRINGS:
2809 	case ETHTOOL_GRXCLSRLCNT:
2810 	case ETHTOOL_GRXCLSRULE:
2811 	case ETHTOOL_GRXCLSRLALL:
2812 	case ETHTOOL_GRXFHINDIR:
2813 	case ETHTOOL_GRSSH:
2814 	case ETHTOOL_GFEATURES:
2815 	case ETHTOOL_GCHANNELS:
2816 	case ETHTOOL_GET_TS_INFO:
2817 	case ETHTOOL_GEEE:
2818 	case ETHTOOL_GTUNABLE:
2819 	case ETHTOOL_PHY_GTUNABLE:
2820 	case ETHTOOL_GLINKSETTINGS:
2821 	case ETHTOOL_GFECPARAM:
2822 		break;
2823 	default:
2824 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2825 			return -EPERM;
2826 	}
2827 
2828 	if (dev->dev.parent)
2829 		pm_runtime_get_sync(dev->dev.parent);
2830 
2831 	if (!netif_device_present(dev)) {
2832 		rc = -ENODEV;
2833 		goto out;
2834 	}
2835 
2836 	if (dev->ethtool_ops->begin) {
2837 		rc = dev->ethtool_ops->begin(dev);
2838 		if (rc < 0)
2839 			goto out;
2840 	}
2841 	old_features = dev->features;
2842 
2843 	switch (ethcmd) {
2844 	case ETHTOOL_GSET:
2845 		rc = ethtool_get_settings(dev, useraddr);
2846 		break;
2847 	case ETHTOOL_SSET:
2848 		rc = ethtool_set_settings(dev, useraddr);
2849 		break;
2850 	case ETHTOOL_GDRVINFO:
2851 		rc = ethtool_get_drvinfo(dev, devlink_state);
2852 		break;
2853 	case ETHTOOL_GREGS:
2854 		rc = ethtool_get_regs(dev, useraddr);
2855 		break;
2856 	case ETHTOOL_GWOL:
2857 		rc = ethtool_get_wol(dev, useraddr);
2858 		break;
2859 	case ETHTOOL_SWOL:
2860 		rc = ethtool_set_wol(dev, useraddr);
2861 		break;
2862 	case ETHTOOL_GMSGLVL:
2863 		rc = ethtool_get_value(dev, useraddr, ethcmd,
2864 				       dev->ethtool_ops->get_msglevel);
2865 		break;
2866 	case ETHTOOL_SMSGLVL:
2867 		rc = ethtool_set_value_void(dev, useraddr,
2868 				       dev->ethtool_ops->set_msglevel);
2869 		if (!rc)
2870 			ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2871 		break;
2872 	case ETHTOOL_GEEE:
2873 		rc = ethtool_get_eee(dev, useraddr);
2874 		break;
2875 	case ETHTOOL_SEEE:
2876 		rc = ethtool_set_eee(dev, useraddr);
2877 		break;
2878 	case ETHTOOL_NWAY_RST:
2879 		rc = ethtool_nway_reset(dev);
2880 		break;
2881 	case ETHTOOL_GLINK:
2882 		rc = ethtool_get_link(dev, useraddr);
2883 		break;
2884 	case ETHTOOL_GEEPROM:
2885 		rc = ethtool_get_eeprom(dev, useraddr);
2886 		break;
2887 	case ETHTOOL_SEEPROM:
2888 		rc = ethtool_set_eeprom(dev, useraddr);
2889 		break;
2890 	case ETHTOOL_GCOALESCE:
2891 		rc = ethtool_get_coalesce(dev, useraddr);
2892 		break;
2893 	case ETHTOOL_SCOALESCE:
2894 		rc = ethtool_set_coalesce(dev, useraddr);
2895 		break;
2896 	case ETHTOOL_GRINGPARAM:
2897 		rc = ethtool_get_ringparam(dev, useraddr);
2898 		break;
2899 	case ETHTOOL_SRINGPARAM:
2900 		rc = ethtool_set_ringparam(dev, useraddr);
2901 		break;
2902 	case ETHTOOL_GPAUSEPARAM:
2903 		rc = ethtool_get_pauseparam(dev, useraddr);
2904 		break;
2905 	case ETHTOOL_SPAUSEPARAM:
2906 		rc = ethtool_set_pauseparam(dev, useraddr);
2907 		break;
2908 	case ETHTOOL_TEST:
2909 		rc = ethtool_self_test(dev, useraddr);
2910 		break;
2911 	case ETHTOOL_GSTRINGS:
2912 		rc = ethtool_get_strings(dev, useraddr);
2913 		break;
2914 	case ETHTOOL_PHYS_ID:
2915 		rc = ethtool_phys_id(dev, useraddr);
2916 		break;
2917 	case ETHTOOL_GSTATS:
2918 		rc = ethtool_get_stats(dev, useraddr);
2919 		break;
2920 	case ETHTOOL_GPERMADDR:
2921 		rc = ethtool_get_perm_addr(dev, useraddr);
2922 		break;
2923 	case ETHTOOL_GFLAGS:
2924 		rc = ethtool_get_value(dev, useraddr, ethcmd,
2925 					__ethtool_get_flags);
2926 		break;
2927 	case ETHTOOL_SFLAGS:
2928 		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2929 		break;
2930 	case ETHTOOL_GPFLAGS:
2931 		rc = ethtool_get_value(dev, useraddr, ethcmd,
2932 				       dev->ethtool_ops->get_priv_flags);
2933 		if (!rc)
2934 			ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2935 		break;
2936 	case ETHTOOL_SPFLAGS:
2937 		rc = ethtool_set_value(dev, useraddr,
2938 				       dev->ethtool_ops->set_priv_flags);
2939 		break;
2940 	case ETHTOOL_GRXFH:
2941 	case ETHTOOL_GRXRINGS:
2942 	case ETHTOOL_GRXCLSRLCNT:
2943 	case ETHTOOL_GRXCLSRULE:
2944 	case ETHTOOL_GRXCLSRLALL:
2945 		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2946 		break;
2947 	case ETHTOOL_SRXFH:
2948 	case ETHTOOL_SRXCLSRLDEL:
2949 	case ETHTOOL_SRXCLSRLINS:
2950 		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2951 		break;
2952 	case ETHTOOL_FLASHDEV:
2953 		rc = ethtool_flash_device(dev, devlink_state);
2954 		break;
2955 	case ETHTOOL_RESET:
2956 		rc = ethtool_reset(dev, useraddr);
2957 		break;
2958 	case ETHTOOL_GSSET_INFO:
2959 		rc = ethtool_get_sset_info(dev, useraddr);
2960 		break;
2961 	case ETHTOOL_GRXFHINDIR:
2962 		rc = ethtool_get_rxfh_indir(dev, useraddr);
2963 		break;
2964 	case ETHTOOL_SRXFHINDIR:
2965 		rc = ethtool_set_rxfh_indir(dev, useraddr);
2966 		break;
2967 	case ETHTOOL_GRSSH:
2968 		rc = ethtool_get_rxfh(dev, useraddr);
2969 		break;
2970 	case ETHTOOL_SRSSH:
2971 		rc = ethtool_set_rxfh(dev, useraddr);
2972 		break;
2973 	case ETHTOOL_GFEATURES:
2974 		rc = ethtool_get_features(dev, useraddr);
2975 		break;
2976 	case ETHTOOL_SFEATURES:
2977 		rc = ethtool_set_features(dev, useraddr);
2978 		break;
2979 	case ETHTOOL_GTXCSUM:
2980 	case ETHTOOL_GRXCSUM:
2981 	case ETHTOOL_GSG:
2982 	case ETHTOOL_GTSO:
2983 	case ETHTOOL_GGSO:
2984 	case ETHTOOL_GGRO:
2985 		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2986 		break;
2987 	case ETHTOOL_STXCSUM:
2988 	case ETHTOOL_SRXCSUM:
2989 	case ETHTOOL_SSG:
2990 	case ETHTOOL_STSO:
2991 	case ETHTOOL_SGSO:
2992 	case ETHTOOL_SGRO:
2993 		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2994 		break;
2995 	case ETHTOOL_GCHANNELS:
2996 		rc = ethtool_get_channels(dev, useraddr);
2997 		break;
2998 	case ETHTOOL_SCHANNELS:
2999 		rc = ethtool_set_channels(dev, useraddr);
3000 		break;
3001 	case ETHTOOL_SET_DUMP:
3002 		rc = ethtool_set_dump(dev, useraddr);
3003 		break;
3004 	case ETHTOOL_GET_DUMP_FLAG:
3005 		rc = ethtool_get_dump_flag(dev, useraddr);
3006 		break;
3007 	case ETHTOOL_GET_DUMP_DATA:
3008 		rc = ethtool_get_dump_data(dev, useraddr);
3009 		break;
3010 	case ETHTOOL_GET_TS_INFO:
3011 		rc = ethtool_get_ts_info(dev, useraddr);
3012 		break;
3013 	case ETHTOOL_GMODULEINFO:
3014 		rc = ethtool_get_module_info(dev, useraddr);
3015 		break;
3016 	case ETHTOOL_GMODULEEEPROM:
3017 		rc = ethtool_get_module_eeprom(dev, useraddr);
3018 		break;
3019 	case ETHTOOL_GTUNABLE:
3020 		rc = ethtool_get_tunable(dev, useraddr);
3021 		break;
3022 	case ETHTOOL_STUNABLE:
3023 		rc = ethtool_set_tunable(dev, useraddr);
3024 		break;
3025 	case ETHTOOL_GPHYSTATS:
3026 		rc = ethtool_get_phy_stats(dev, useraddr);
3027 		break;
3028 	case ETHTOOL_PERQUEUE:
3029 		rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3030 		break;
3031 	case ETHTOOL_GLINKSETTINGS:
3032 		rc = ethtool_get_link_ksettings(dev, useraddr);
3033 		break;
3034 	case ETHTOOL_SLINKSETTINGS:
3035 		rc = ethtool_set_link_ksettings(dev, useraddr);
3036 		break;
3037 	case ETHTOOL_PHY_GTUNABLE:
3038 		rc = get_phy_tunable(dev, useraddr);
3039 		break;
3040 	case ETHTOOL_PHY_STUNABLE:
3041 		rc = set_phy_tunable(dev, useraddr);
3042 		break;
3043 	case ETHTOOL_GFECPARAM:
3044 		rc = ethtool_get_fecparam(dev, useraddr);
3045 		break;
3046 	case ETHTOOL_SFECPARAM:
3047 		rc = ethtool_set_fecparam(dev, useraddr);
3048 		break;
3049 	default:
3050 		rc = -EOPNOTSUPP;
3051 	}
3052 
3053 	if (dev->ethtool_ops->complete)
3054 		dev->ethtool_ops->complete(dev);
3055 
3056 	if (old_features != dev->features)
3057 		netdev_features_change(dev);
3058 out:
3059 	if (dev->dev.parent)
3060 		pm_runtime_put(dev->dev.parent);
3061 
3062 	return rc;
3063 }
3064 
3065 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3066 {
3067 	struct ethtool_devlink_compat *state;
3068 	u32 ethcmd;
3069 	int rc;
3070 
3071 	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3072 		return -EFAULT;
3073 
3074 	state = kzalloc(sizeof(*state), GFP_KERNEL);
3075 	if (!state)
3076 		return -ENOMEM;
3077 
3078 	switch (ethcmd) {
3079 	case ETHTOOL_FLASHDEV:
3080 		if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3081 			rc = -EFAULT;
3082 			goto exit_free;
3083 		}
3084 		state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3085 		break;
3086 	}
3087 
3088 	rtnl_lock();
3089 	rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3090 	rtnl_unlock();
3091 	if (rc)
3092 		goto exit_free;
3093 
3094 	switch (ethcmd) {
3095 	case ETHTOOL_FLASHDEV:
3096 		if (state->devlink)
3097 			rc = devlink_compat_flash_update(state->devlink,
3098 							 state->efl.data);
3099 		break;
3100 	case ETHTOOL_GDRVINFO:
3101 		if (state->devlink)
3102 			devlink_compat_running_version(state->devlink,
3103 						       state->info.fw_version,
3104 						       sizeof(state->info.fw_version));
3105 		if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3106 			rc = -EFAULT;
3107 			goto exit_free;
3108 		}
3109 		break;
3110 	}
3111 
3112 exit_free:
3113 	if (state->devlink)
3114 		devlink_put(state->devlink);
3115 	kfree(state);
3116 	return rc;
3117 }
3118 
3119 struct ethtool_rx_flow_key {
3120 	struct flow_dissector_key_basic			basic;
3121 	union {
3122 		struct flow_dissector_key_ipv4_addrs	ipv4;
3123 		struct flow_dissector_key_ipv6_addrs	ipv6;
3124 	};
3125 	struct flow_dissector_key_ports			tp;
3126 	struct flow_dissector_key_ip			ip;
3127 	struct flow_dissector_key_vlan			vlan;
3128 	struct flow_dissector_key_eth_addrs		eth_addrs;
3129 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3130 
3131 struct ethtool_rx_flow_match {
3132 	struct flow_dissector		dissector;
3133 	struct ethtool_rx_flow_key	key;
3134 	struct ethtool_rx_flow_key	mask;
3135 };
3136 
3137 struct ethtool_rx_flow_rule *
3138 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3139 {
3140 	const struct ethtool_rx_flow_spec *fs = input->fs;
3141 	struct ethtool_rx_flow_match *match;
3142 	struct ethtool_rx_flow_rule *flow;
3143 	struct flow_action_entry *act;
3144 
3145 	flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3146 		       sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3147 	if (!flow)
3148 		return ERR_PTR(-ENOMEM);
3149 
3150 	/* ethtool_rx supports only one single action per rule. */
3151 	flow->rule = flow_rule_alloc(1);
3152 	if (!flow->rule) {
3153 		kfree(flow);
3154 		return ERR_PTR(-ENOMEM);
3155 	}
3156 
3157 	match = (struct ethtool_rx_flow_match *)flow->priv;
3158 	flow->rule->match.dissector	= &match->dissector;
3159 	flow->rule->match.mask		= &match->mask;
3160 	flow->rule->match.key		= &match->key;
3161 
3162 	match->mask.basic.n_proto = htons(0xffff);
3163 
3164 	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3165 	case ETHER_FLOW: {
3166 		const struct ethhdr *ether_spec, *ether_m_spec;
3167 
3168 		ether_spec = &fs->h_u.ether_spec;
3169 		ether_m_spec = &fs->m_u.ether_spec;
3170 
3171 		if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3172 			ether_addr_copy(match->key.eth_addrs.src,
3173 					ether_spec->h_source);
3174 			ether_addr_copy(match->mask.eth_addrs.src,
3175 					ether_m_spec->h_source);
3176 		}
3177 		if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3178 			ether_addr_copy(match->key.eth_addrs.dst,
3179 					ether_spec->h_dest);
3180 			ether_addr_copy(match->mask.eth_addrs.dst,
3181 					ether_m_spec->h_dest);
3182 		}
3183 		if (ether_m_spec->h_proto) {
3184 			match->key.basic.n_proto = ether_spec->h_proto;
3185 			match->mask.basic.n_proto = ether_m_spec->h_proto;
3186 		}
3187 		}
3188 		break;
3189 	case TCP_V4_FLOW:
3190 	case UDP_V4_FLOW: {
3191 		const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3192 
3193 		match->key.basic.n_proto = htons(ETH_P_IP);
3194 
3195 		v4_spec = &fs->h_u.tcp_ip4_spec;
3196 		v4_m_spec = &fs->m_u.tcp_ip4_spec;
3197 
3198 		if (v4_m_spec->ip4src) {
3199 			match->key.ipv4.src = v4_spec->ip4src;
3200 			match->mask.ipv4.src = v4_m_spec->ip4src;
3201 		}
3202 		if (v4_m_spec->ip4dst) {
3203 			match->key.ipv4.dst = v4_spec->ip4dst;
3204 			match->mask.ipv4.dst = v4_m_spec->ip4dst;
3205 		}
3206 		if (v4_m_spec->ip4src ||
3207 		    v4_m_spec->ip4dst) {
3208 			match->dissector.used_keys |=
3209 				BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3210 			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3211 				offsetof(struct ethtool_rx_flow_key, ipv4);
3212 		}
3213 		if (v4_m_spec->psrc) {
3214 			match->key.tp.src = v4_spec->psrc;
3215 			match->mask.tp.src = v4_m_spec->psrc;
3216 		}
3217 		if (v4_m_spec->pdst) {
3218 			match->key.tp.dst = v4_spec->pdst;
3219 			match->mask.tp.dst = v4_m_spec->pdst;
3220 		}
3221 		if (v4_m_spec->psrc ||
3222 		    v4_m_spec->pdst) {
3223 			match->dissector.used_keys |=
3224 				BIT(FLOW_DISSECTOR_KEY_PORTS);
3225 			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3226 				offsetof(struct ethtool_rx_flow_key, tp);
3227 		}
3228 		if (v4_m_spec->tos) {
3229 			match->key.ip.tos = v4_spec->tos;
3230 			match->mask.ip.tos = v4_m_spec->tos;
3231 			match->dissector.used_keys |=
3232 				BIT(FLOW_DISSECTOR_KEY_IP);
3233 			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3234 				offsetof(struct ethtool_rx_flow_key, ip);
3235 		}
3236 		}
3237 		break;
3238 	case TCP_V6_FLOW:
3239 	case UDP_V6_FLOW: {
3240 		const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3241 
3242 		match->key.basic.n_proto = htons(ETH_P_IPV6);
3243 
3244 		v6_spec = &fs->h_u.tcp_ip6_spec;
3245 		v6_m_spec = &fs->m_u.tcp_ip6_spec;
3246 		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3247 			memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3248 			       sizeof(match->key.ipv6.src));
3249 			memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3250 			       sizeof(match->mask.ipv6.src));
3251 		}
3252 		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3253 			memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3254 			       sizeof(match->key.ipv6.dst));
3255 			memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3256 			       sizeof(match->mask.ipv6.dst));
3257 		}
3258 		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3259 		    !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3260 			match->dissector.used_keys |=
3261 				BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3262 			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3263 				offsetof(struct ethtool_rx_flow_key, ipv6);
3264 		}
3265 		if (v6_m_spec->psrc) {
3266 			match->key.tp.src = v6_spec->psrc;
3267 			match->mask.tp.src = v6_m_spec->psrc;
3268 		}
3269 		if (v6_m_spec->pdst) {
3270 			match->key.tp.dst = v6_spec->pdst;
3271 			match->mask.tp.dst = v6_m_spec->pdst;
3272 		}
3273 		if (v6_m_spec->psrc ||
3274 		    v6_m_spec->pdst) {
3275 			match->dissector.used_keys |=
3276 				BIT(FLOW_DISSECTOR_KEY_PORTS);
3277 			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3278 				offsetof(struct ethtool_rx_flow_key, tp);
3279 		}
3280 		if (v6_m_spec->tclass) {
3281 			match->key.ip.tos = v6_spec->tclass;
3282 			match->mask.ip.tos = v6_m_spec->tclass;
3283 			match->dissector.used_keys |=
3284 				BIT(FLOW_DISSECTOR_KEY_IP);
3285 			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3286 				offsetof(struct ethtool_rx_flow_key, ip);
3287 		}
3288 		}
3289 		break;
3290 	default:
3291 		ethtool_rx_flow_rule_destroy(flow);
3292 		return ERR_PTR(-EINVAL);
3293 	}
3294 
3295 	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3296 	case TCP_V4_FLOW:
3297 	case TCP_V6_FLOW:
3298 		match->key.basic.ip_proto = IPPROTO_TCP;
3299 		match->mask.basic.ip_proto = 0xff;
3300 		break;
3301 	case UDP_V4_FLOW:
3302 	case UDP_V6_FLOW:
3303 		match->key.basic.ip_proto = IPPROTO_UDP;
3304 		match->mask.basic.ip_proto = 0xff;
3305 		break;
3306 	}
3307 
3308 	match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3309 	match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3310 		offsetof(struct ethtool_rx_flow_key, basic);
3311 
3312 	if (fs->flow_type & FLOW_EXT) {
3313 		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3314 		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3315 
3316 		if (ext_m_spec->vlan_etype) {
3317 			match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3318 			match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3319 		}
3320 
3321 		if (ext_m_spec->vlan_tci) {
3322 			match->key.vlan.vlan_id =
3323 				ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3324 			match->mask.vlan.vlan_id =
3325 				ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3326 
3327 			match->key.vlan.vlan_dei =
3328 				!!(ext_h_spec->vlan_tci & htons(0x1000));
3329 			match->mask.vlan.vlan_dei =
3330 				!!(ext_m_spec->vlan_tci & htons(0x1000));
3331 
3332 			match->key.vlan.vlan_priority =
3333 				(ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3334 			match->mask.vlan.vlan_priority =
3335 				(ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3336 		}
3337 
3338 		if (ext_m_spec->vlan_etype ||
3339 		    ext_m_spec->vlan_tci) {
3340 			match->dissector.used_keys |=
3341 				BIT(FLOW_DISSECTOR_KEY_VLAN);
3342 			match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3343 				offsetof(struct ethtool_rx_flow_key, vlan);
3344 		}
3345 	}
3346 	if (fs->flow_type & FLOW_MAC_EXT) {
3347 		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3348 		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3349 
3350 		memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3351 		       ETH_ALEN);
3352 		memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3353 		       ETH_ALEN);
3354 
3355 		match->dissector.used_keys |=
3356 			BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3357 		match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3358 			offsetof(struct ethtool_rx_flow_key, eth_addrs);
3359 	}
3360 
3361 	act = &flow->rule->action.entries[0];
3362 	switch (fs->ring_cookie) {
3363 	case RX_CLS_FLOW_DISC:
3364 		act->id = FLOW_ACTION_DROP;
3365 		break;
3366 	case RX_CLS_FLOW_WAKE:
3367 		act->id = FLOW_ACTION_WAKE;
3368 		break;
3369 	default:
3370 		act->id = FLOW_ACTION_QUEUE;
3371 		if (fs->flow_type & FLOW_RSS)
3372 			act->queue.ctx = input->rss_ctx;
3373 
3374 		act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3375 		act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3376 		break;
3377 	}
3378 
3379 	return flow;
3380 }
3381 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3382 
3383 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3384 {
3385 	kfree(flow->rule);
3386 	kfree(flow);
3387 }
3388 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3389