xref: /linux/net/ethtool/ioctl.c (revision 9410645520e9b820069761f3450ef6661418e279)
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 <linux/utsname.h>
30 #include <net/devlink.h>
31 #include <net/ipv6.h>
32 #include <net/xdp_sock_drv.h>
33 #include <net/flow_offload.h>
34 #include <linux/ethtool_netlink.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 
netdev_to_devlink_get(struct net_device * dev)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 
ethtool_op_get_link(struct net_device * dev)59 u32 ethtool_op_get_link(struct net_device *dev)
60 {
61 	/* Synchronize carrier state with link watch, see also rtnl_getlink() */
62 	linkwatch_sync_dev(dev);
63 
64 	return netif_carrier_ok(dev) ? 1 : 0;
65 }
66 EXPORT_SYMBOL(ethtool_op_get_link);
67 
ethtool_op_get_ts_info(struct net_device * dev,struct kernel_ethtool_ts_info * info)68 int ethtool_op_get_ts_info(struct net_device *dev,
69 			   struct kernel_ethtool_ts_info *info)
70 {
71 	info->so_timestamping =
72 		SOF_TIMESTAMPING_TX_SOFTWARE |
73 		SOF_TIMESTAMPING_RX_SOFTWARE |
74 		SOF_TIMESTAMPING_SOFTWARE;
75 	info->phc_index = -1;
76 	return 0;
77 }
78 EXPORT_SYMBOL(ethtool_op_get_ts_info);
79 
80 /* Handlers for each ethtool command */
81 
ethtool_get_features(struct net_device * dev,void __user * useraddr)82 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
83 {
84 	struct ethtool_gfeatures cmd = {
85 		.cmd = ETHTOOL_GFEATURES,
86 		.size = ETHTOOL_DEV_FEATURE_WORDS,
87 	};
88 	struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
89 	u32 __user *sizeaddr;
90 	u32 copy_size;
91 	int i;
92 
93 	/* in case feature bits run out again */
94 	BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
95 
96 	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
97 		features[i].available = (u32)(dev->hw_features >> (32 * i));
98 		features[i].requested = (u32)(dev->wanted_features >> (32 * i));
99 		features[i].active = (u32)(dev->features >> (32 * i));
100 		features[i].never_changed =
101 			(u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
102 	}
103 
104 	sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
105 	if (get_user(copy_size, sizeaddr))
106 		return -EFAULT;
107 
108 	if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
109 		copy_size = ETHTOOL_DEV_FEATURE_WORDS;
110 
111 	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
112 		return -EFAULT;
113 	useraddr += sizeof(cmd);
114 	if (copy_to_user(useraddr, features,
115 			 array_size(copy_size, sizeof(*features))))
116 		return -EFAULT;
117 
118 	return 0;
119 }
120 
ethtool_set_features(struct net_device * dev,void __user * useraddr)121 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
122 {
123 	struct ethtool_sfeatures cmd;
124 	struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
125 	netdev_features_t wanted = 0, valid = 0;
126 	int i, ret = 0;
127 
128 	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
129 		return -EFAULT;
130 	useraddr += sizeof(cmd);
131 
132 	if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
133 		return -EINVAL;
134 
135 	if (copy_from_user(features, useraddr, sizeof(features)))
136 		return -EFAULT;
137 
138 	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
139 		valid |= (netdev_features_t)features[i].valid << (32 * i);
140 		wanted |= (netdev_features_t)features[i].requested << (32 * i);
141 	}
142 
143 	if (valid & ~NETIF_F_ETHTOOL_BITS)
144 		return -EINVAL;
145 
146 	if (valid & ~dev->hw_features) {
147 		valid &= dev->hw_features;
148 		ret |= ETHTOOL_F_UNSUPPORTED;
149 	}
150 
151 	dev->wanted_features &= ~valid;
152 	dev->wanted_features |= wanted & valid;
153 	__netdev_update_features(dev);
154 
155 	if ((dev->wanted_features ^ dev->features) & valid)
156 		ret |= ETHTOOL_F_WISH;
157 
158 	return ret;
159 }
160 
__ethtool_get_sset_count(struct net_device * dev,int sset)161 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
162 {
163 	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
164 	const struct ethtool_ops *ops = dev->ethtool_ops;
165 
166 	if (sset == ETH_SS_FEATURES)
167 		return ARRAY_SIZE(netdev_features_strings);
168 
169 	if (sset == ETH_SS_RSS_HASH_FUNCS)
170 		return ARRAY_SIZE(rss_hash_func_strings);
171 
172 	if (sset == ETH_SS_TUNABLES)
173 		return ARRAY_SIZE(tunable_strings);
174 
175 	if (sset == ETH_SS_PHY_TUNABLES)
176 		return ARRAY_SIZE(phy_tunable_strings);
177 
178 	if (sset == ETH_SS_PHY_STATS && dev->phydev &&
179 	    !ops->get_ethtool_phy_stats &&
180 	    phy_ops && phy_ops->get_sset_count)
181 		return phy_ops->get_sset_count(dev->phydev);
182 
183 	if (sset == ETH_SS_LINK_MODES)
184 		return __ETHTOOL_LINK_MODE_MASK_NBITS;
185 
186 	if (ops->get_sset_count && ops->get_strings)
187 		return ops->get_sset_count(dev, sset);
188 	else
189 		return -EOPNOTSUPP;
190 }
191 
__ethtool_get_strings(struct net_device * dev,u32 stringset,u8 * data)192 static void __ethtool_get_strings(struct net_device *dev,
193 	u32 stringset, u8 *data)
194 {
195 	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
196 	const struct ethtool_ops *ops = dev->ethtool_ops;
197 
198 	if (stringset == ETH_SS_FEATURES)
199 		memcpy(data, netdev_features_strings,
200 			sizeof(netdev_features_strings));
201 	else if (stringset == ETH_SS_RSS_HASH_FUNCS)
202 		memcpy(data, rss_hash_func_strings,
203 		       sizeof(rss_hash_func_strings));
204 	else if (stringset == ETH_SS_TUNABLES)
205 		memcpy(data, tunable_strings, sizeof(tunable_strings));
206 	else if (stringset == ETH_SS_PHY_TUNABLES)
207 		memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
208 	else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
209 		 !ops->get_ethtool_phy_stats && phy_ops &&
210 		 phy_ops->get_strings)
211 		phy_ops->get_strings(dev->phydev, data);
212 	else if (stringset == ETH_SS_LINK_MODES)
213 		memcpy(data, link_mode_names,
214 		       __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
215 	else
216 		/* ops->get_strings is valid because checked earlier */
217 		ops->get_strings(dev, stringset, data);
218 }
219 
ethtool_get_feature_mask(u32 eth_cmd)220 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
221 {
222 	/* feature masks of legacy discrete ethtool ops */
223 
224 	switch (eth_cmd) {
225 	case ETHTOOL_GTXCSUM:
226 	case ETHTOOL_STXCSUM:
227 		return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
228 		       NETIF_F_SCTP_CRC;
229 	case ETHTOOL_GRXCSUM:
230 	case ETHTOOL_SRXCSUM:
231 		return NETIF_F_RXCSUM;
232 	case ETHTOOL_GSG:
233 	case ETHTOOL_SSG:
234 		return NETIF_F_SG | NETIF_F_FRAGLIST;
235 	case ETHTOOL_GTSO:
236 	case ETHTOOL_STSO:
237 		return NETIF_F_ALL_TSO;
238 	case ETHTOOL_GGSO:
239 	case ETHTOOL_SGSO:
240 		return NETIF_F_GSO;
241 	case ETHTOOL_GGRO:
242 	case ETHTOOL_SGRO:
243 		return NETIF_F_GRO;
244 	default:
245 		BUG();
246 	}
247 }
248 
ethtool_get_one_feature(struct net_device * dev,char __user * useraddr,u32 ethcmd)249 static int ethtool_get_one_feature(struct net_device *dev,
250 	char __user *useraddr, u32 ethcmd)
251 {
252 	netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
253 	struct ethtool_value edata = {
254 		.cmd = ethcmd,
255 		.data = !!(dev->features & mask),
256 	};
257 
258 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
259 		return -EFAULT;
260 	return 0;
261 }
262 
ethtool_set_one_feature(struct net_device * dev,void __user * useraddr,u32 ethcmd)263 static int ethtool_set_one_feature(struct net_device *dev,
264 	void __user *useraddr, u32 ethcmd)
265 {
266 	struct ethtool_value edata;
267 	netdev_features_t mask;
268 
269 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
270 		return -EFAULT;
271 
272 	mask = ethtool_get_feature_mask(ethcmd);
273 	mask &= dev->hw_features;
274 	if (!mask)
275 		return -EOPNOTSUPP;
276 
277 	if (edata.data)
278 		dev->wanted_features |= mask;
279 	else
280 		dev->wanted_features &= ~mask;
281 
282 	__netdev_update_features(dev);
283 
284 	return 0;
285 }
286 
287 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
288 			  ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
289 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
290 			  NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
291 			  NETIF_F_RXHASH)
292 
__ethtool_get_flags(struct net_device * dev)293 static u32 __ethtool_get_flags(struct net_device *dev)
294 {
295 	u32 flags = 0;
296 
297 	if (dev->features & NETIF_F_LRO)
298 		flags |= ETH_FLAG_LRO;
299 	if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
300 		flags |= ETH_FLAG_RXVLAN;
301 	if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
302 		flags |= ETH_FLAG_TXVLAN;
303 	if (dev->features & NETIF_F_NTUPLE)
304 		flags |= ETH_FLAG_NTUPLE;
305 	if (dev->features & NETIF_F_RXHASH)
306 		flags |= ETH_FLAG_RXHASH;
307 
308 	return flags;
309 }
310 
__ethtool_set_flags(struct net_device * dev,u32 data)311 static int __ethtool_set_flags(struct net_device *dev, u32 data)
312 {
313 	netdev_features_t features = 0, changed;
314 
315 	if (data & ~ETH_ALL_FLAGS)
316 		return -EINVAL;
317 
318 	if (data & ETH_FLAG_LRO)
319 		features |= NETIF_F_LRO;
320 	if (data & ETH_FLAG_RXVLAN)
321 		features |= NETIF_F_HW_VLAN_CTAG_RX;
322 	if (data & ETH_FLAG_TXVLAN)
323 		features |= NETIF_F_HW_VLAN_CTAG_TX;
324 	if (data & ETH_FLAG_NTUPLE)
325 		features |= NETIF_F_NTUPLE;
326 	if (data & ETH_FLAG_RXHASH)
327 		features |= NETIF_F_RXHASH;
328 
329 	/* allow changing only bits set in hw_features */
330 	changed = (features ^ dev->features) & ETH_ALL_FEATURES;
331 	if (changed & ~dev->hw_features)
332 		return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
333 
334 	dev->wanted_features =
335 		(dev->wanted_features & ~changed) | (features & changed);
336 
337 	__netdev_update_features(dev);
338 
339 	return 0;
340 }
341 
342 /* Given two link masks, AND them together and save the result in dst. */
ethtool_intersect_link_masks(struct ethtool_link_ksettings * dst,struct ethtool_link_ksettings * src)343 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
344 				  struct ethtool_link_ksettings *src)
345 {
346 	unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
347 	unsigned int idx = 0;
348 
349 	for (; idx < size; idx++) {
350 		dst->link_modes.supported[idx] &=
351 			src->link_modes.supported[idx];
352 		dst->link_modes.advertising[idx] &=
353 			src->link_modes.advertising[idx];
354 	}
355 }
356 EXPORT_SYMBOL(ethtool_intersect_link_masks);
357 
ethtool_convert_legacy_u32_to_link_mode(unsigned long * dst,u32 legacy_u32)358 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
359 					     u32 legacy_u32)
360 {
361 	linkmode_zero(dst);
362 	dst[0] = legacy_u32;
363 }
364 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
365 
366 /* return false if src had higher bits set. lower bits always updated. */
ethtool_convert_link_mode_to_legacy_u32(u32 * legacy_u32,const unsigned long * src)367 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
368 					     const unsigned long *src)
369 {
370 	*legacy_u32 = src[0];
371 	return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
372 		__ETHTOOL_LINK_MODE_MASK_NBITS;
373 }
374 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
375 
376 /* return false if ksettings link modes had higher bits
377  * set. legacy_settings always updated (best effort)
378  */
379 static bool
convert_link_ksettings_to_legacy_settings(struct ethtool_cmd * legacy_settings,const struct ethtool_link_ksettings * link_ksettings)380 convert_link_ksettings_to_legacy_settings(
381 	struct ethtool_cmd *legacy_settings,
382 	const struct ethtool_link_ksettings *link_ksettings)
383 {
384 	bool retval = true;
385 
386 	memset(legacy_settings, 0, sizeof(*legacy_settings));
387 	/* this also clears the deprecated fields in legacy structure:
388 	 * __u8		transceiver;
389 	 * __u32	maxtxpkt;
390 	 * __u32	maxrxpkt;
391 	 */
392 
393 	retval &= ethtool_convert_link_mode_to_legacy_u32(
394 		&legacy_settings->supported,
395 		link_ksettings->link_modes.supported);
396 	retval &= ethtool_convert_link_mode_to_legacy_u32(
397 		&legacy_settings->advertising,
398 		link_ksettings->link_modes.advertising);
399 	retval &= ethtool_convert_link_mode_to_legacy_u32(
400 		&legacy_settings->lp_advertising,
401 		link_ksettings->link_modes.lp_advertising);
402 	ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
403 	legacy_settings->duplex
404 		= link_ksettings->base.duplex;
405 	legacy_settings->port
406 		= link_ksettings->base.port;
407 	legacy_settings->phy_address
408 		= link_ksettings->base.phy_address;
409 	legacy_settings->autoneg
410 		= link_ksettings->base.autoneg;
411 	legacy_settings->mdio_support
412 		= link_ksettings->base.mdio_support;
413 	legacy_settings->eth_tp_mdix
414 		= link_ksettings->base.eth_tp_mdix;
415 	legacy_settings->eth_tp_mdix_ctrl
416 		= link_ksettings->base.eth_tp_mdix_ctrl;
417 	legacy_settings->transceiver
418 		= link_ksettings->base.transceiver;
419 	return retval;
420 }
421 
422 /* number of 32-bit words to store the user's link mode bitmaps */
423 #define __ETHTOOL_LINK_MODE_MASK_NU32			\
424 	DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
425 
426 /* layout of the struct passed from/to userland */
427 struct ethtool_link_usettings {
428 	struct ethtool_link_settings base;
429 	struct {
430 		__u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
431 		__u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
432 		__u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
433 	} link_modes;
434 };
435 
436 /* Internal kernel helper to query a device ethtool_link_settings. */
__ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * link_ksettings)437 int __ethtool_get_link_ksettings(struct net_device *dev,
438 				 struct ethtool_link_ksettings *link_ksettings)
439 {
440 	ASSERT_RTNL();
441 
442 	if (!dev->ethtool_ops->get_link_ksettings)
443 		return -EOPNOTSUPP;
444 
445 	if (!netif_device_present(dev))
446 		return -ENODEV;
447 
448 	memset(link_ksettings, 0, sizeof(*link_ksettings));
449 	return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
450 }
451 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
452 
453 /* convert ethtool_link_usettings in user space to a kernel internal
454  * ethtool_link_ksettings. return 0 on success, errno on error.
455  */
load_link_ksettings_from_user(struct ethtool_link_ksettings * to,const void __user * from)456 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
457 					 const void __user *from)
458 {
459 	struct ethtool_link_usettings link_usettings;
460 
461 	if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
462 		return -EFAULT;
463 
464 	memcpy(&to->base, &link_usettings.base, sizeof(to->base));
465 	bitmap_from_arr32(to->link_modes.supported,
466 			  link_usettings.link_modes.supported,
467 			  __ETHTOOL_LINK_MODE_MASK_NBITS);
468 	bitmap_from_arr32(to->link_modes.advertising,
469 			  link_usettings.link_modes.advertising,
470 			  __ETHTOOL_LINK_MODE_MASK_NBITS);
471 	bitmap_from_arr32(to->link_modes.lp_advertising,
472 			  link_usettings.link_modes.lp_advertising,
473 			  __ETHTOOL_LINK_MODE_MASK_NBITS);
474 
475 	return 0;
476 }
477 
478 /* Check if the user is trying to change anything besides speed/duplex */
ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings * cmd)479 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
480 {
481 	struct ethtool_link_settings base2 = {};
482 
483 	base2.speed = cmd->base.speed;
484 	base2.port = PORT_OTHER;
485 	base2.duplex = cmd->base.duplex;
486 	base2.cmd = cmd->base.cmd;
487 	base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
488 
489 	return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
490 		bitmap_empty(cmd->link_modes.supported,
491 			     __ETHTOOL_LINK_MODE_MASK_NBITS) &&
492 		bitmap_empty(cmd->link_modes.lp_advertising,
493 			     __ETHTOOL_LINK_MODE_MASK_NBITS);
494 }
495 
496 /* convert a kernel internal ethtool_link_ksettings to
497  * ethtool_link_usettings in user space. return 0 on success, errno on
498  * error.
499  */
500 static int
store_link_ksettings_for_user(void __user * to,const struct ethtool_link_ksettings * from)501 store_link_ksettings_for_user(void __user *to,
502 			      const struct ethtool_link_ksettings *from)
503 {
504 	struct ethtool_link_usettings link_usettings;
505 
506 	memcpy(&link_usettings, from, sizeof(link_usettings));
507 	bitmap_to_arr32(link_usettings.link_modes.supported,
508 			from->link_modes.supported,
509 			__ETHTOOL_LINK_MODE_MASK_NBITS);
510 	bitmap_to_arr32(link_usettings.link_modes.advertising,
511 			from->link_modes.advertising,
512 			__ETHTOOL_LINK_MODE_MASK_NBITS);
513 	bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
514 			from->link_modes.lp_advertising,
515 			__ETHTOOL_LINK_MODE_MASK_NBITS);
516 
517 	if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
518 		return -EFAULT;
519 
520 	return 0;
521 }
522 
523 /* Query device for its ethtool_link_settings. */
ethtool_get_link_ksettings(struct net_device * dev,void __user * useraddr)524 static int ethtool_get_link_ksettings(struct net_device *dev,
525 				      void __user *useraddr)
526 {
527 	int err = 0;
528 	struct ethtool_link_ksettings link_ksettings;
529 
530 	ASSERT_RTNL();
531 	if (!dev->ethtool_ops->get_link_ksettings)
532 		return -EOPNOTSUPP;
533 
534 	/* handle bitmap nbits handshake */
535 	if (copy_from_user(&link_ksettings.base, useraddr,
536 			   sizeof(link_ksettings.base)))
537 		return -EFAULT;
538 
539 	if (__ETHTOOL_LINK_MODE_MASK_NU32
540 	    != link_ksettings.base.link_mode_masks_nwords) {
541 		/* wrong link mode nbits requested */
542 		memset(&link_ksettings, 0, sizeof(link_ksettings));
543 		link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
544 		/* send back number of words required as negative val */
545 		compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
546 				   "need too many bits for link modes!");
547 		link_ksettings.base.link_mode_masks_nwords
548 			= -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
549 
550 		/* copy the base fields back to user, not the link
551 		 * mode bitmaps
552 		 */
553 		if (copy_to_user(useraddr, &link_ksettings.base,
554 				 sizeof(link_ksettings.base)))
555 			return -EFAULT;
556 
557 		return 0;
558 	}
559 
560 	/* handshake successful: user/kernel agree on
561 	 * link_mode_masks_nwords
562 	 */
563 
564 	memset(&link_ksettings, 0, sizeof(link_ksettings));
565 	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
566 	if (err < 0)
567 		return err;
568 
569 	/* make sure we tell the right values to user */
570 	link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
571 	link_ksettings.base.link_mode_masks_nwords
572 		= __ETHTOOL_LINK_MODE_MASK_NU32;
573 	link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
574 	link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
575 	link_ksettings.base.rate_matching = RATE_MATCH_NONE;
576 
577 	return store_link_ksettings_for_user(useraddr, &link_ksettings);
578 }
579 
580 /* Update device ethtool_link_settings. */
ethtool_set_link_ksettings(struct net_device * dev,void __user * useraddr)581 static int ethtool_set_link_ksettings(struct net_device *dev,
582 				      void __user *useraddr)
583 {
584 	struct ethtool_link_ksettings link_ksettings = {};
585 	int err;
586 
587 	ASSERT_RTNL();
588 
589 	if (!dev->ethtool_ops->set_link_ksettings)
590 		return -EOPNOTSUPP;
591 
592 	/* make sure nbits field has expected value */
593 	if (copy_from_user(&link_ksettings.base, useraddr,
594 			   sizeof(link_ksettings.base)))
595 		return -EFAULT;
596 
597 	if (__ETHTOOL_LINK_MODE_MASK_NU32
598 	    != link_ksettings.base.link_mode_masks_nwords)
599 		return -EINVAL;
600 
601 	/* copy the whole structure, now that we know it has expected
602 	 * format
603 	 */
604 	err = load_link_ksettings_from_user(&link_ksettings, useraddr);
605 	if (err)
606 		return err;
607 
608 	/* re-check nwords field, just in case */
609 	if (__ETHTOOL_LINK_MODE_MASK_NU32
610 	    != link_ksettings.base.link_mode_masks_nwords)
611 		return -EINVAL;
612 
613 	if (link_ksettings.base.master_slave_cfg ||
614 	    link_ksettings.base.master_slave_state)
615 		return -EINVAL;
616 
617 	err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
618 	if (err >= 0) {
619 		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
620 		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
621 	}
622 	return err;
623 }
624 
ethtool_virtdev_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd,u32 * dev_speed,u8 * dev_duplex)625 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
626 				       const struct ethtool_link_ksettings *cmd,
627 				       u32 *dev_speed, u8 *dev_duplex)
628 {
629 	u32 speed;
630 	u8 duplex;
631 
632 	speed = cmd->base.speed;
633 	duplex = cmd->base.duplex;
634 	/* don't allow custom speed and duplex */
635 	if (!ethtool_validate_speed(speed) ||
636 	    !ethtool_validate_duplex(duplex) ||
637 	    !ethtool_virtdev_validate_cmd(cmd))
638 		return -EINVAL;
639 	*dev_speed = speed;
640 	*dev_duplex = duplex;
641 
642 	return 0;
643 }
644 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
645 
646 /* Query device for its ethtool_cmd settings.
647  *
648  * Backward compatibility note: for compatibility with legacy ethtool, this is
649  * now implemented via get_link_ksettings. When driver reports higher link mode
650  * bits, a kernel warning is logged once (with name of 1st driver/device) to
651  * recommend user to upgrade ethtool, but the command is successful (only the
652  * lower link mode bits reported back to user). Deprecated fields from
653  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
654  */
ethtool_get_settings(struct net_device * dev,void __user * useraddr)655 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
656 {
657 	struct ethtool_link_ksettings link_ksettings;
658 	struct ethtool_cmd cmd;
659 	int err;
660 
661 	ASSERT_RTNL();
662 	if (!dev->ethtool_ops->get_link_ksettings)
663 		return -EOPNOTSUPP;
664 
665 	if (dev->ethtool->module_fw_flash_in_progress)
666 		return -EBUSY;
667 
668 	memset(&link_ksettings, 0, sizeof(link_ksettings));
669 	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
670 	if (err < 0)
671 		return err;
672 	convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
673 
674 	/* send a sensible cmd tag back to user */
675 	cmd.cmd = ETHTOOL_GSET;
676 
677 	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
678 		return -EFAULT;
679 
680 	return 0;
681 }
682 
683 /* Update device link settings with given ethtool_cmd.
684  *
685  * Backward compatibility note: for compatibility with legacy ethtool, this is
686  * now always implemented via set_link_settings. When user's request updates
687  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
688  * warning is logged once (with name of 1st driver/device) to recommend user to
689  * upgrade ethtool, and the request is rejected.
690  */
ethtool_set_settings(struct net_device * dev,void __user * useraddr)691 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
692 {
693 	struct ethtool_link_ksettings link_ksettings;
694 	struct ethtool_cmd cmd;
695 	int ret;
696 
697 	ASSERT_RTNL();
698 
699 	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
700 		return -EFAULT;
701 	if (!dev->ethtool_ops->set_link_ksettings)
702 		return -EOPNOTSUPP;
703 
704 	if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
705 		return -EINVAL;
706 	link_ksettings.base.link_mode_masks_nwords =
707 		__ETHTOOL_LINK_MODE_MASK_NU32;
708 	ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
709 	if (ret >= 0) {
710 		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
711 		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
712 	}
713 	return ret;
714 }
715 
716 static int
ethtool_get_drvinfo(struct net_device * dev,struct ethtool_devlink_compat * rsp)717 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
718 {
719 	const struct ethtool_ops *ops = dev->ethtool_ops;
720 	struct device *parent = dev->dev.parent;
721 
722 	rsp->info.cmd = ETHTOOL_GDRVINFO;
723 	strscpy(rsp->info.version, init_uts_ns.name.release,
724 		sizeof(rsp->info.version));
725 	if (ops->get_drvinfo) {
726 		ops->get_drvinfo(dev, &rsp->info);
727 		if (!rsp->info.bus_info[0] && parent)
728 			strscpy(rsp->info.bus_info, dev_name(parent),
729 				sizeof(rsp->info.bus_info));
730 		if (!rsp->info.driver[0] && parent && parent->driver)
731 			strscpy(rsp->info.driver, parent->driver->name,
732 				sizeof(rsp->info.driver));
733 	} else if (parent && parent->driver) {
734 		strscpy(rsp->info.bus_info, dev_name(parent),
735 			sizeof(rsp->info.bus_info));
736 		strscpy(rsp->info.driver, parent->driver->name,
737 			sizeof(rsp->info.driver));
738 	} else if (dev->rtnl_link_ops) {
739 		strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
740 			sizeof(rsp->info.driver));
741 	} else {
742 		return -EOPNOTSUPP;
743 	}
744 
745 	/*
746 	 * this method of obtaining string set info is deprecated;
747 	 * Use ETHTOOL_GSSET_INFO instead.
748 	 */
749 	if (ops->get_sset_count) {
750 		int rc;
751 
752 		rc = ops->get_sset_count(dev, ETH_SS_TEST);
753 		if (rc >= 0)
754 			rsp->info.testinfo_len = rc;
755 		rc = ops->get_sset_count(dev, ETH_SS_STATS);
756 		if (rc >= 0)
757 			rsp->info.n_stats = rc;
758 		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
759 		if (rc >= 0)
760 			rsp->info.n_priv_flags = rc;
761 	}
762 	if (ops->get_regs_len) {
763 		int ret = ops->get_regs_len(dev);
764 
765 		if (ret > 0)
766 			rsp->info.regdump_len = ret;
767 	}
768 
769 	if (ops->get_eeprom_len)
770 		rsp->info.eedump_len = ops->get_eeprom_len(dev);
771 
772 	if (!rsp->info.fw_version[0])
773 		rsp->devlink = netdev_to_devlink_get(dev);
774 
775 	return 0;
776 }
777 
ethtool_get_sset_info(struct net_device * dev,void __user * useraddr)778 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
779 						    void __user *useraddr)
780 {
781 	struct ethtool_sset_info info;
782 	u64 sset_mask;
783 	int i, idx = 0, n_bits = 0, ret, rc;
784 	u32 *info_buf = NULL;
785 
786 	if (copy_from_user(&info, useraddr, sizeof(info)))
787 		return -EFAULT;
788 
789 	/* store copy of mask, because we zero struct later on */
790 	sset_mask = info.sset_mask;
791 	if (!sset_mask)
792 		return 0;
793 
794 	/* calculate size of return buffer */
795 	n_bits = hweight64(sset_mask);
796 
797 	memset(&info, 0, sizeof(info));
798 	info.cmd = ETHTOOL_GSSET_INFO;
799 
800 	info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
801 	if (!info_buf)
802 		return -ENOMEM;
803 
804 	/*
805 	 * fill return buffer based on input bitmask and successful
806 	 * get_sset_count return
807 	 */
808 	for (i = 0; i < 64; i++) {
809 		if (!(sset_mask & (1ULL << i)))
810 			continue;
811 
812 		rc = __ethtool_get_sset_count(dev, i);
813 		if (rc >= 0) {
814 			info.sset_mask |= (1ULL << i);
815 			info_buf[idx++] = rc;
816 		}
817 	}
818 
819 	ret = -EFAULT;
820 	if (copy_to_user(useraddr, &info, sizeof(info)))
821 		goto out;
822 
823 	useraddr += offsetof(struct ethtool_sset_info, data);
824 	if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
825 		goto out;
826 
827 	ret = 0;
828 
829 out:
830 	kfree(info_buf);
831 	return ret;
832 }
833 
834 static noinline_for_stack int
ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc * rxnfc,const struct compat_ethtool_rxnfc __user * useraddr,size_t size)835 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
836 			       const struct compat_ethtool_rxnfc __user *useraddr,
837 			       size_t size)
838 {
839 	struct compat_ethtool_rxnfc crxnfc = {};
840 
841 	/* We expect there to be holes between fs.m_ext and
842 	 * fs.ring_cookie and at the end of fs, but nowhere else.
843 	 * On non-x86, no conversion should be needed.
844 	 */
845 	BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
846 		     sizeof(struct compat_ethtool_rxnfc) !=
847 		     sizeof(struct ethtool_rxnfc));
848 	BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
849 		     sizeof(useraddr->fs.m_ext) !=
850 		     offsetof(struct ethtool_rxnfc, fs.m_ext) +
851 		     sizeof(rxnfc->fs.m_ext));
852 	BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
853 		     offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
854 		     offsetof(struct ethtool_rxnfc, fs.location) -
855 		     offsetof(struct ethtool_rxnfc, fs.ring_cookie));
856 
857 	if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
858 		return -EFAULT;
859 
860 	*rxnfc = (struct ethtool_rxnfc) {
861 		.cmd		= crxnfc.cmd,
862 		.flow_type	= crxnfc.flow_type,
863 		.data		= crxnfc.data,
864 		.fs		= {
865 			.flow_type	= crxnfc.fs.flow_type,
866 			.h_u		= crxnfc.fs.h_u,
867 			.h_ext		= crxnfc.fs.h_ext,
868 			.m_u		= crxnfc.fs.m_u,
869 			.m_ext		= crxnfc.fs.m_ext,
870 			.ring_cookie	= crxnfc.fs.ring_cookie,
871 			.location	= crxnfc.fs.location,
872 		},
873 		.rule_cnt	= crxnfc.rule_cnt,
874 	};
875 
876 	return 0;
877 }
878 
ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc * rxnfc,const void __user * useraddr,size_t size)879 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
880 					const void __user *useraddr,
881 					size_t size)
882 {
883 	if (compat_need_64bit_alignment_fixup())
884 		return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
885 
886 	if (copy_from_user(rxnfc, useraddr, size))
887 		return -EFAULT;
888 
889 	return 0;
890 }
891 
ethtool_rxnfc_copy_to_compat(void __user * useraddr,const struct ethtool_rxnfc * rxnfc,size_t size,const u32 * rule_buf)892 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
893 					const struct ethtool_rxnfc *rxnfc,
894 					size_t size, const u32 *rule_buf)
895 {
896 	struct compat_ethtool_rxnfc crxnfc;
897 
898 	memset(&crxnfc, 0, sizeof(crxnfc));
899 	crxnfc = (struct compat_ethtool_rxnfc) {
900 		.cmd		= rxnfc->cmd,
901 		.flow_type	= rxnfc->flow_type,
902 		.data		= rxnfc->data,
903 		.fs		= {
904 			.flow_type	= rxnfc->fs.flow_type,
905 			.h_u		= rxnfc->fs.h_u,
906 			.h_ext		= rxnfc->fs.h_ext,
907 			.m_u		= rxnfc->fs.m_u,
908 			.m_ext		= rxnfc->fs.m_ext,
909 			.ring_cookie	= rxnfc->fs.ring_cookie,
910 			.location	= rxnfc->fs.location,
911 		},
912 		.rule_cnt	= rxnfc->rule_cnt,
913 	};
914 
915 	if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
916 		return -EFAULT;
917 
918 	return 0;
919 }
920 
ethtool_rxnfc_copy_struct(u32 cmd,struct ethtool_rxnfc * info,size_t * info_size,void __user * useraddr)921 static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
922 				     size_t *info_size, void __user *useraddr)
923 {
924 	/* struct ethtool_rxnfc was originally defined for
925 	 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
926 	 * members.  User-space might still be using that
927 	 * definition.
928 	 */
929 	if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
930 		*info_size = (offsetof(struct ethtool_rxnfc, data) +
931 			      sizeof(info->data));
932 
933 	if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
934 		return -EFAULT;
935 
936 	if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
937 		*info_size = sizeof(*info);
938 		if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
939 			return -EFAULT;
940 		/* Since malicious users may modify the original data,
941 		 * we need to check whether FLOW_RSS is still requested.
942 		 */
943 		if (!(info->flow_type & FLOW_RSS))
944 			return -EINVAL;
945 	}
946 
947 	if (info->cmd != cmd)
948 		return -EINVAL;
949 
950 	return 0;
951 }
952 
ethtool_rxnfc_copy_to_user(void __user * useraddr,const struct ethtool_rxnfc * rxnfc,size_t size,const u32 * rule_buf)953 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
954 				      const struct ethtool_rxnfc *rxnfc,
955 				      size_t size, const u32 *rule_buf)
956 {
957 	int ret;
958 
959 	if (compat_need_64bit_alignment_fixup()) {
960 		ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
961 						   rule_buf);
962 		useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
963 	} else {
964 		ret = copy_to_user(useraddr, rxnfc, size);
965 		useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
966 	}
967 
968 	if (ret)
969 		return -EFAULT;
970 
971 	if (rule_buf) {
972 		if (copy_to_user(useraddr, rule_buf,
973 				 rxnfc->rule_cnt * sizeof(u32)))
974 			return -EFAULT;
975 	}
976 
977 	return 0;
978 }
979 
ethtool_set_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)980 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
981 						u32 cmd, void __user *useraddr)
982 {
983 	const struct ethtool_ops *ops = dev->ethtool_ops;
984 	struct ethtool_rxnfc info;
985 	size_t info_size = sizeof(info);
986 	int rc;
987 
988 	if (!ops->set_rxnfc)
989 		return -EOPNOTSUPP;
990 
991 	rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
992 	if (rc)
993 		return rc;
994 
995 	if (ops->get_rxfh) {
996 		struct ethtool_rxfh_param rxfh = {};
997 
998 		rc = ops->get_rxfh(dev, &rxfh);
999 		if (rc)
1000 			return rc;
1001 
1002 		/* Sanity check: if symmetric-xor is set, then:
1003 		 * 1 - no other fields besides IP src/dst and/or L4 src/dst
1004 		 * 2 - If src is set, dst must also be set
1005 		 */
1006 		if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1007 		    ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1008 				    RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1009 		     (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1010 		     (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1011 			return -EINVAL;
1012 	}
1013 
1014 	rc = ops->set_rxnfc(dev, &info);
1015 	if (rc)
1016 		return rc;
1017 
1018 	if (cmd == ETHTOOL_SRXCLSRLINS &&
1019 	    ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1020 		return -EFAULT;
1021 
1022 	return 0;
1023 }
1024 
ethtool_get_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)1025 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1026 						u32 cmd, void __user *useraddr)
1027 {
1028 	struct ethtool_rxnfc info;
1029 	size_t info_size = sizeof(info);
1030 	const struct ethtool_ops *ops = dev->ethtool_ops;
1031 	int ret;
1032 	void *rule_buf = NULL;
1033 
1034 	if (!ops->get_rxnfc)
1035 		return -EOPNOTSUPP;
1036 
1037 	ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1038 	if (ret)
1039 		return ret;
1040 
1041 	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1042 		if (info.rule_cnt > 0) {
1043 			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1044 				rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1045 						   GFP_USER);
1046 			if (!rule_buf)
1047 				return -ENOMEM;
1048 		}
1049 	}
1050 
1051 	ret = ops->get_rxnfc(dev, &info, rule_buf);
1052 	if (ret < 0)
1053 		goto err_out;
1054 
1055 	ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1056 err_out:
1057 	kfree(rule_buf);
1058 
1059 	return ret;
1060 }
1061 
ethtool_copy_validate_indir(u32 * indir,void __user * useraddr,struct ethtool_rxnfc * rx_rings,u32 size)1062 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1063 					struct ethtool_rxnfc *rx_rings,
1064 					u32 size)
1065 {
1066 	int i;
1067 
1068 	if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1069 		return -EFAULT;
1070 
1071 	/* Validate ring indices */
1072 	for (i = 0; i < size; i++)
1073 		if (indir[i] >= rx_rings->data)
1074 			return -EINVAL;
1075 
1076 	return 0;
1077 }
1078 
1079 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1080 
netdev_rss_key_fill(void * buffer,size_t len)1081 void netdev_rss_key_fill(void *buffer, size_t len)
1082 {
1083 	BUG_ON(len > sizeof(netdev_rss_key));
1084 	net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1085 	memcpy(buffer, netdev_rss_key, len);
1086 }
1087 EXPORT_SYMBOL(netdev_rss_key_fill);
1088 
ethtool_get_rxfh_indir(struct net_device * dev,void __user * useraddr)1089 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1090 						     void __user *useraddr)
1091 {
1092 	struct ethtool_rxfh_param rxfh = {};
1093 	u32 user_size;
1094 	int ret;
1095 
1096 	if (!dev->ethtool_ops->get_rxfh_indir_size ||
1097 	    !dev->ethtool_ops->get_rxfh)
1098 		return -EOPNOTSUPP;
1099 	rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1100 	if (rxfh.indir_size == 0)
1101 		return -EOPNOTSUPP;
1102 
1103 	if (copy_from_user(&user_size,
1104 			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1105 			   sizeof(user_size)))
1106 		return -EFAULT;
1107 
1108 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1109 			 &rxfh.indir_size, sizeof(rxfh.indir_size)))
1110 		return -EFAULT;
1111 
1112 	/* If the user buffer size is 0, this is just a query for the
1113 	 * device table size.  Otherwise, if it's smaller than the
1114 	 * device table size it's an error.
1115 	 */
1116 	if (user_size < rxfh.indir_size)
1117 		return user_size == 0 ? 0 : -EINVAL;
1118 
1119 	rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1120 	if (!rxfh.indir)
1121 		return -ENOMEM;
1122 
1123 	ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1124 	if (ret)
1125 		goto out;
1126 	if (copy_to_user(useraddr +
1127 			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1128 			 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1129 		ret = -EFAULT;
1130 
1131 out:
1132 	kfree(rxfh.indir);
1133 	return ret;
1134 }
1135 
ethtool_set_rxfh_indir(struct net_device * dev,void __user * useraddr)1136 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1137 						     void __user *useraddr)
1138 {
1139 	const struct ethtool_ops *ops = dev->ethtool_ops;
1140 	struct ethtool_rxfh_param rxfh_dev = {};
1141 	struct netlink_ext_ack *extack = NULL;
1142 	struct ethtool_rxnfc rx_rings;
1143 	u32 user_size, i;
1144 	int ret;
1145 	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1146 
1147 	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1148 	    !ops->get_rxnfc)
1149 		return -EOPNOTSUPP;
1150 
1151 	rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1152 	if (rxfh_dev.indir_size == 0)
1153 		return -EOPNOTSUPP;
1154 
1155 	if (copy_from_user(&user_size,
1156 			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1157 			   sizeof(user_size)))
1158 		return -EFAULT;
1159 
1160 	if (user_size != 0 && user_size != rxfh_dev.indir_size)
1161 		return -EINVAL;
1162 
1163 	rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1164 				 sizeof(rxfh_dev.indir[0]), GFP_USER);
1165 	if (!rxfh_dev.indir)
1166 		return -ENOMEM;
1167 
1168 	rx_rings.cmd = ETHTOOL_GRXRINGS;
1169 	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1170 	if (ret)
1171 		goto out;
1172 
1173 	if (user_size == 0) {
1174 		u32 *indir = rxfh_dev.indir;
1175 
1176 		for (i = 0; i < rxfh_dev.indir_size; i++)
1177 			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1178 	} else {
1179 		ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1180 						  useraddr + ringidx_offset,
1181 						  &rx_rings,
1182 						  rxfh_dev.indir_size);
1183 		if (ret)
1184 			goto out;
1185 	}
1186 
1187 	rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1188 	ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1189 	if (ret)
1190 		goto out;
1191 
1192 	/* indicate whether rxfh was set to default */
1193 	if (user_size == 0)
1194 		dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1195 	else
1196 		dev->priv_flags |= IFF_RXFH_CONFIGURED;
1197 
1198 out:
1199 	kfree(rxfh_dev.indir);
1200 	return ret;
1201 }
1202 
ethtool_get_rxfh(struct net_device * dev,void __user * useraddr)1203 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1204 					       void __user *useraddr)
1205 {
1206 	const struct ethtool_ops *ops = dev->ethtool_ops;
1207 	struct ethtool_rxfh_param rxfh_dev = {};
1208 	u32 user_indir_size, user_key_size;
1209 	struct ethtool_rxfh_context *ctx;
1210 	struct ethtool_rxfh rxfh;
1211 	u32 indir_bytes;
1212 	u8 *rss_config;
1213 	u32 total_size;
1214 	int ret;
1215 
1216 	if (!ops->get_rxfh)
1217 		return -EOPNOTSUPP;
1218 
1219 	if (ops->get_rxfh_indir_size)
1220 		rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1221 	if (ops->get_rxfh_key_size)
1222 		rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1223 
1224 	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1225 		return -EFAULT;
1226 	user_indir_size = rxfh.indir_size;
1227 	user_key_size = rxfh.key_size;
1228 
1229 	/* Check that reserved fields are 0 for now */
1230 	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1231 		return -EINVAL;
1232 	/* Most drivers don't handle rss_context, check it's 0 as well */
1233 	if (rxfh.rss_context && !(ops->cap_rss_ctx_supported ||
1234 				  ops->create_rxfh_context))
1235 		return -EOPNOTSUPP;
1236 
1237 	rxfh.indir_size = rxfh_dev.indir_size;
1238 	rxfh.key_size = rxfh_dev.key_size;
1239 	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1240 		return -EFAULT;
1241 
1242 	if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1243 	    (user_key_size && user_key_size != rxfh_dev.key_size))
1244 		return -EINVAL;
1245 
1246 	indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1247 	total_size = indir_bytes + user_key_size;
1248 	rss_config = kzalloc(total_size, GFP_USER);
1249 	if (!rss_config)
1250 		return -ENOMEM;
1251 
1252 	if (user_indir_size)
1253 		rxfh_dev.indir = (u32 *)rss_config;
1254 
1255 	if (user_key_size)
1256 		rxfh_dev.key = rss_config + indir_bytes;
1257 
1258 	if (rxfh.rss_context) {
1259 		ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
1260 		if (!ctx) {
1261 			ret = -ENOENT;
1262 			goto out;
1263 		}
1264 		if (rxfh_dev.indir)
1265 			memcpy(rxfh_dev.indir, ethtool_rxfh_context_indir(ctx),
1266 			       indir_bytes);
1267 		if (!ops->rxfh_per_ctx_key) {
1268 			rxfh_dev.key_size = 0;
1269 		} else {
1270 			if (rxfh_dev.key)
1271 				memcpy(rxfh_dev.key,
1272 				       ethtool_rxfh_context_key(ctx),
1273 				       user_key_size);
1274 			rxfh_dev.hfunc = ctx->hfunc;
1275 		}
1276 		rxfh_dev.input_xfrm = ctx->input_xfrm;
1277 		ret = 0;
1278 	} else {
1279 		ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1280 		if (ret)
1281 			goto out;
1282 	}
1283 
1284 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1285 			 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1286 		ret = -EFAULT;
1287 	} else if (copy_to_user(useraddr +
1288 				offsetof(struct ethtool_rxfh, input_xfrm),
1289 				&rxfh_dev.input_xfrm,
1290 				sizeof(rxfh.input_xfrm))) {
1291 		ret = -EFAULT;
1292 	} else if (copy_to_user(useraddr +
1293 				offsetof(struct ethtool_rxfh, key_size),
1294 				&rxfh_dev.key_size,
1295 				sizeof(rxfh.key_size))) {
1296 		ret = -EFAULT;
1297 	} else if (copy_to_user(useraddr +
1298 			      offsetof(struct ethtool_rxfh, rss_config[0]),
1299 			      rss_config, total_size)) {
1300 		ret = -EFAULT;
1301 	}
1302 out:
1303 	kfree(rss_config);
1304 
1305 	return ret;
1306 }
1307 
1308 static struct ethtool_rxfh_context *
ethtool_rxfh_ctx_alloc(const struct ethtool_ops * ops,u32 indir_size,u32 key_size)1309 ethtool_rxfh_ctx_alloc(const struct ethtool_ops *ops,
1310 		       u32 indir_size, u32 key_size)
1311 {
1312 	size_t indir_bytes, flex_len, key_off, size;
1313 	struct ethtool_rxfh_context *ctx;
1314 	u32 priv_bytes, indir_max;
1315 	u16 key_max;
1316 
1317 	key_max = max(key_size, ops->rxfh_key_space);
1318 	indir_max = max(indir_size, ops->rxfh_indir_space);
1319 
1320 	priv_bytes = ALIGN(ops->rxfh_priv_size, sizeof(u32));
1321 	indir_bytes = array_size(indir_max, sizeof(u32));
1322 
1323 	key_off = size_add(priv_bytes, indir_bytes);
1324 	flex_len = size_add(key_off, key_max);
1325 	size = struct_size_t(struct ethtool_rxfh_context, data, flex_len);
1326 
1327 	ctx = kzalloc(size, GFP_KERNEL_ACCOUNT);
1328 	if (!ctx)
1329 		return NULL;
1330 
1331 	ctx->indir_size = indir_size;
1332 	ctx->key_size = key_size;
1333 	ctx->key_off = key_off;
1334 	ctx->priv_size = ops->rxfh_priv_size;
1335 
1336 	ctx->hfunc = ETH_RSS_HASH_NO_CHANGE;
1337 	ctx->input_xfrm = RXH_XFRM_NO_CHANGE;
1338 
1339 	return ctx;
1340 }
1341 
ethtool_set_rxfh(struct net_device * dev,void __user * useraddr)1342 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1343 					       void __user *useraddr)
1344 {
1345 	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1346 	const struct ethtool_ops *ops = dev->ethtool_ops;
1347 	u32 dev_indir_size = 0, dev_key_size = 0, i;
1348 	u32 user_indir_len = 0, indir_bytes = 0;
1349 	struct ethtool_rxfh_param rxfh_dev = {};
1350 	struct ethtool_rxfh_context *ctx = NULL;
1351 	struct netlink_ext_ack *extack = NULL;
1352 	struct ethtool_rxnfc rx_rings;
1353 	struct ethtool_rxfh rxfh;
1354 	bool locked = false; /* dev->ethtool->rss_lock taken */
1355 	bool create = false;
1356 	u8 *rss_config;
1357 	int ret;
1358 
1359 	if (!ops->get_rxnfc || !ops->set_rxfh)
1360 		return -EOPNOTSUPP;
1361 
1362 	if (ops->get_rxfh_indir_size)
1363 		dev_indir_size = ops->get_rxfh_indir_size(dev);
1364 	if (ops->get_rxfh_key_size)
1365 		dev_key_size = ops->get_rxfh_key_size(dev);
1366 
1367 	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1368 		return -EFAULT;
1369 
1370 	/* Check that reserved fields are 0 for now */
1371 	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1372 		return -EINVAL;
1373 	/* Most drivers don't handle rss_context, check it's 0 as well */
1374 	if (rxfh.rss_context && !(ops->cap_rss_ctx_supported ||
1375 				  ops->create_rxfh_context))
1376 		return -EOPNOTSUPP;
1377 	/* Check input data transformation capabilities */
1378 	if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1379 	    rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1380 		return -EINVAL;
1381 	if (rxfh.input_xfrm != RXH_XFRM_NO_CHANGE &&
1382 	    (rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1383 	    !ops->cap_rss_sym_xor_supported)
1384 		return -EOPNOTSUPP;
1385 	create = rxfh.rss_context == ETH_RXFH_CONTEXT_ALLOC;
1386 
1387 	if ((rxfh.indir_size &&
1388 	     rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1389 	     rxfh.indir_size != dev_indir_size) ||
1390 	    (rxfh.key_size && rxfh.key_size != dev_key_size))
1391 		return -EINVAL;
1392 
1393 	/* Must request at least one change: indir size, hash key, function
1394 	 * or input transformation.
1395 	 * There's no need for any of it in case of context creation.
1396 	 */
1397 	if (!create &&
1398 	    (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1399 	     rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1400 	     rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1401 		return -EINVAL;
1402 
1403 	indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1404 
1405 	/* Check settings which may be global rather than per RSS-context */
1406 	if (rxfh.rss_context && !ops->rxfh_per_ctx_key)
1407 		if (rxfh.key_size ||
1408 		    (rxfh.hfunc && rxfh.hfunc != ETH_RSS_HASH_NO_CHANGE) ||
1409 		    (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_NO_CHANGE))
1410 			return -EOPNOTSUPP;
1411 
1412 	rss_config = kzalloc(indir_bytes + dev_key_size, GFP_USER);
1413 	if (!rss_config)
1414 		return -ENOMEM;
1415 
1416 	rx_rings.cmd = ETHTOOL_GRXRINGS;
1417 	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1418 	if (ret)
1419 		goto out;
1420 
1421 	/* rxfh.indir_size == 0 means reset the indir table to default (master
1422 	 * context) or delete the context (other RSS contexts).
1423 	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1424 	 */
1425 	if (rxfh.indir_size &&
1426 	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1427 		user_indir_len = indir_bytes;
1428 		rxfh_dev.indir = (u32 *)rss_config;
1429 		rxfh_dev.indir_size = dev_indir_size;
1430 		ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1431 						  useraddr + rss_cfg_offset,
1432 						  &rx_rings,
1433 						  rxfh.indir_size);
1434 		if (ret)
1435 			goto out;
1436 	} else if (rxfh.indir_size == 0) {
1437 		if (rxfh.rss_context == 0) {
1438 			u32 *indir;
1439 
1440 			rxfh_dev.indir = (u32 *)rss_config;
1441 			rxfh_dev.indir_size = dev_indir_size;
1442 			indir = rxfh_dev.indir;
1443 			for (i = 0; i < dev_indir_size; i++)
1444 				indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1445 		} else {
1446 			rxfh_dev.rss_delete = true;
1447 		}
1448 	}
1449 
1450 	if (rxfh.key_size) {
1451 		rxfh_dev.key_size = dev_key_size;
1452 		rxfh_dev.key = rss_config + indir_bytes;
1453 		if (copy_from_user(rxfh_dev.key,
1454 				   useraddr + rss_cfg_offset + user_indir_len,
1455 				   rxfh.key_size)) {
1456 			ret = -EFAULT;
1457 			goto out;
1458 		}
1459 	}
1460 
1461 	if (rxfh.rss_context) {
1462 		mutex_lock(&dev->ethtool->rss_lock);
1463 		locked = true;
1464 	}
1465 	if (create) {
1466 		if (rxfh_dev.rss_delete) {
1467 			ret = -EINVAL;
1468 			goto out;
1469 		}
1470 		ctx = ethtool_rxfh_ctx_alloc(ops, dev_indir_size, dev_key_size);
1471 		if (!ctx) {
1472 			ret = -ENOMEM;
1473 			goto out;
1474 		}
1475 
1476 		if (ops->create_rxfh_context) {
1477 			u32 limit = ops->rxfh_max_num_contexts ?: U32_MAX;
1478 			u32 ctx_id;
1479 
1480 			/* driver uses new API, core allocates ID */
1481 			ret = xa_alloc(&dev->ethtool->rss_ctx, &ctx_id, ctx,
1482 				       XA_LIMIT(1, limit - 1),
1483 				       GFP_KERNEL_ACCOUNT);
1484 			if (ret < 0) {
1485 				kfree(ctx);
1486 				goto out;
1487 			}
1488 			WARN_ON(!ctx_id); /* can't happen */
1489 			rxfh.rss_context = ctx_id;
1490 		}
1491 	} else if (rxfh.rss_context) {
1492 		ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
1493 		if (!ctx) {
1494 			ret = -ENOENT;
1495 			goto out;
1496 		}
1497 	}
1498 	rxfh_dev.hfunc = rxfh.hfunc;
1499 	rxfh_dev.rss_context = rxfh.rss_context;
1500 	rxfh_dev.input_xfrm = rxfh.input_xfrm;
1501 
1502 	if (rxfh.rss_context && ops->create_rxfh_context) {
1503 		if (create) {
1504 			ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev,
1505 						       extack);
1506 			/* Make sure driver populates defaults */
1507 			WARN_ON_ONCE(!ret && !rxfh_dev.key &&
1508 				     !memchr_inv(ethtool_rxfh_context_key(ctx),
1509 						 0, ctx->key_size));
1510 		} else if (rxfh_dev.rss_delete) {
1511 			ret = ops->remove_rxfh_context(dev, ctx,
1512 						       rxfh.rss_context,
1513 						       extack);
1514 		} else {
1515 			ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev,
1516 						       extack);
1517 		}
1518 	} else {
1519 		ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1520 	}
1521 	if (ret) {
1522 		if (create) {
1523 			/* failed to create, free our new tracking entry */
1524 			if (ops->create_rxfh_context)
1525 				xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
1526 			kfree(ctx);
1527 		}
1528 		goto out;
1529 	}
1530 
1531 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1532 			 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1533 		ret = -EFAULT;
1534 
1535 	if (!rxfh_dev.rss_context) {
1536 		/* indicate whether rxfh was set to default */
1537 		if (rxfh.indir_size == 0)
1538 			dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1539 		else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1540 			dev->priv_flags |= IFF_RXFH_CONFIGURED;
1541 	}
1542 	/* Update rss_ctx tracking */
1543 	if (create && !ops->create_rxfh_context) {
1544 		/* driver uses old API, it chose context ID */
1545 		if (WARN_ON(xa_load(&dev->ethtool->rss_ctx, rxfh_dev.rss_context))) {
1546 			/* context ID reused, our tracking is screwed */
1547 			kfree(ctx);
1548 			goto out;
1549 		}
1550 		/* Allocate the exact ID the driver gave us */
1551 		if (xa_is_err(xa_store(&dev->ethtool->rss_ctx, rxfh_dev.rss_context,
1552 				       ctx, GFP_KERNEL))) {
1553 			kfree(ctx);
1554 			goto out;
1555 		}
1556 
1557 		/* Fetch the defaults for the old API, in the new API drivers
1558 		 * should write defaults into ctx themselves.
1559 		 */
1560 		rxfh_dev.indir = (u32 *)rss_config;
1561 		rxfh_dev.indir_size = dev_indir_size;
1562 
1563 		rxfh_dev.key = rss_config + indir_bytes;
1564 		rxfh_dev.key_size = dev_key_size;
1565 
1566 		ret = ops->get_rxfh(dev, &rxfh_dev);
1567 		if (WARN_ON(ret)) {
1568 			xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
1569 			kfree(ctx);
1570 			goto out;
1571 		}
1572 	}
1573 	if (rxfh_dev.rss_delete) {
1574 		WARN_ON(xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context) != ctx);
1575 		kfree(ctx);
1576 	} else if (ctx) {
1577 		if (rxfh_dev.indir) {
1578 			for (i = 0; i < dev_indir_size; i++)
1579 				ethtool_rxfh_context_indir(ctx)[i] = rxfh_dev.indir[i];
1580 			ctx->indir_configured =
1581 				rxfh.indir_size &&
1582 				rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE;
1583 		}
1584 		if (rxfh_dev.key) {
1585 			memcpy(ethtool_rxfh_context_key(ctx), rxfh_dev.key,
1586 			       dev_key_size);
1587 			ctx->key_configured = !!rxfh.key_size;
1588 		}
1589 		if (rxfh_dev.hfunc != ETH_RSS_HASH_NO_CHANGE)
1590 			ctx->hfunc = rxfh_dev.hfunc;
1591 		if (rxfh_dev.input_xfrm != RXH_XFRM_NO_CHANGE)
1592 			ctx->input_xfrm = rxfh_dev.input_xfrm;
1593 	}
1594 
1595 out:
1596 	if (locked)
1597 		mutex_unlock(&dev->ethtool->rss_lock);
1598 	kfree(rss_config);
1599 	return ret;
1600 }
1601 
ethtool_get_regs(struct net_device * dev,char __user * useraddr)1602 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1603 {
1604 	struct ethtool_regs regs;
1605 	const struct ethtool_ops *ops = dev->ethtool_ops;
1606 	void *regbuf;
1607 	int reglen, ret;
1608 
1609 	if (!ops->get_regs || !ops->get_regs_len)
1610 		return -EOPNOTSUPP;
1611 
1612 	if (copy_from_user(&regs, useraddr, sizeof(regs)))
1613 		return -EFAULT;
1614 
1615 	reglen = ops->get_regs_len(dev);
1616 	if (reglen <= 0)
1617 		return reglen;
1618 
1619 	if (regs.len > reglen)
1620 		regs.len = reglen;
1621 
1622 	regbuf = vzalloc(reglen);
1623 	if (!regbuf)
1624 		return -ENOMEM;
1625 
1626 	if (regs.len < reglen)
1627 		reglen = regs.len;
1628 
1629 	ops->get_regs(dev, &regs, regbuf);
1630 
1631 	ret = -EFAULT;
1632 	if (copy_to_user(useraddr, &regs, sizeof(regs)))
1633 		goto out;
1634 	useraddr += offsetof(struct ethtool_regs, data);
1635 	if (copy_to_user(useraddr, regbuf, reglen))
1636 		goto out;
1637 	ret = 0;
1638 
1639  out:
1640 	vfree(regbuf);
1641 	return ret;
1642 }
1643 
ethtool_reset(struct net_device * dev,char __user * useraddr)1644 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1645 {
1646 	struct ethtool_value reset;
1647 	int ret;
1648 
1649 	if (!dev->ethtool_ops->reset)
1650 		return -EOPNOTSUPP;
1651 
1652 	if (dev->ethtool->module_fw_flash_in_progress)
1653 		return -EBUSY;
1654 
1655 	if (copy_from_user(&reset, useraddr, sizeof(reset)))
1656 		return -EFAULT;
1657 
1658 	ret = dev->ethtool_ops->reset(dev, &reset.data);
1659 	if (ret)
1660 		return ret;
1661 
1662 	if (copy_to_user(useraddr, &reset, sizeof(reset)))
1663 		return -EFAULT;
1664 	return 0;
1665 }
1666 
ethtool_get_wol(struct net_device * dev,char __user * useraddr)1667 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1668 {
1669 	struct ethtool_wolinfo wol;
1670 
1671 	if (!dev->ethtool_ops->get_wol)
1672 		return -EOPNOTSUPP;
1673 
1674 	memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1675 	wol.cmd = ETHTOOL_GWOL;
1676 	dev->ethtool_ops->get_wol(dev, &wol);
1677 
1678 	if (copy_to_user(useraddr, &wol, sizeof(wol)))
1679 		return -EFAULT;
1680 	return 0;
1681 }
1682 
ethtool_set_wol(struct net_device * dev,char __user * useraddr)1683 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1684 {
1685 	struct ethtool_wolinfo wol, cur_wol;
1686 	int ret;
1687 
1688 	if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1689 		return -EOPNOTSUPP;
1690 
1691 	memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1692 	cur_wol.cmd = ETHTOOL_GWOL;
1693 	dev->ethtool_ops->get_wol(dev, &cur_wol);
1694 
1695 	if (copy_from_user(&wol, useraddr, sizeof(wol)))
1696 		return -EFAULT;
1697 
1698 	if (wol.wolopts & ~cur_wol.supported)
1699 		return -EINVAL;
1700 
1701 	if (wol.wolopts == cur_wol.wolopts &&
1702 	    !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1703 		return 0;
1704 
1705 	ret = dev->ethtool_ops->set_wol(dev, &wol);
1706 	if (ret)
1707 		return ret;
1708 
1709 	dev->ethtool->wol_enabled = !!wol.wolopts;
1710 	ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1711 
1712 	return 0;
1713 }
1714 
eee_to_keee(struct ethtool_keee * keee,const struct ethtool_eee * eee)1715 static void eee_to_keee(struct ethtool_keee *keee,
1716 			const struct ethtool_eee *eee)
1717 {
1718 	memset(keee, 0, sizeof(*keee));
1719 
1720 	keee->eee_enabled = eee->eee_enabled;
1721 	keee->tx_lpi_enabled = eee->tx_lpi_enabled;
1722 	keee->tx_lpi_timer = eee->tx_lpi_timer;
1723 
1724 	ethtool_convert_legacy_u32_to_link_mode(keee->advertised,
1725 						eee->advertised);
1726 }
1727 
keee_to_eee(struct ethtool_eee * eee,const struct ethtool_keee * keee)1728 static void keee_to_eee(struct ethtool_eee *eee,
1729 			const struct ethtool_keee *keee)
1730 {
1731 	bool overflow;
1732 
1733 	memset(eee, 0, sizeof(*eee));
1734 
1735 	eee->eee_active = keee->eee_active;
1736 	eee->eee_enabled = keee->eee_enabled;
1737 	eee->tx_lpi_enabled = keee->tx_lpi_enabled;
1738 	eee->tx_lpi_timer = keee->tx_lpi_timer;
1739 
1740 	overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported,
1741 							    keee->supported);
1742 	ethtool_convert_link_mode_to_legacy_u32(&eee->advertised,
1743 						keee->advertised);
1744 	ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised,
1745 						keee->lp_advertised);
1746 	if (overflow)
1747 		pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n");
1748 }
1749 
ethtool_get_eee(struct net_device * dev,char __user * useraddr)1750 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1751 {
1752 	struct ethtool_keee keee;
1753 	struct ethtool_eee eee;
1754 	int rc;
1755 
1756 	if (!dev->ethtool_ops->get_eee)
1757 		return -EOPNOTSUPP;
1758 
1759 	memset(&keee, 0, sizeof(keee));
1760 	rc = dev->ethtool_ops->get_eee(dev, &keee);
1761 	if (rc)
1762 		return rc;
1763 
1764 	keee_to_eee(&eee, &keee);
1765 	if (copy_to_user(useraddr, &eee, sizeof(eee)))
1766 		return -EFAULT;
1767 
1768 	return 0;
1769 }
1770 
ethtool_set_eee(struct net_device * dev,char __user * useraddr)1771 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1772 {
1773 	struct ethtool_keee keee;
1774 	struct ethtool_eee eee;
1775 	int ret;
1776 
1777 	if (!dev->ethtool_ops->set_eee)
1778 		return -EOPNOTSUPP;
1779 
1780 	if (copy_from_user(&eee, useraddr, sizeof(eee)))
1781 		return -EFAULT;
1782 
1783 	eee_to_keee(&keee, &eee);
1784 	ret = dev->ethtool_ops->set_eee(dev, &keee);
1785 	if (!ret)
1786 		ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1787 	return ret;
1788 }
1789 
ethtool_nway_reset(struct net_device * dev)1790 static int ethtool_nway_reset(struct net_device *dev)
1791 {
1792 	if (!dev->ethtool_ops->nway_reset)
1793 		return -EOPNOTSUPP;
1794 
1795 	return dev->ethtool_ops->nway_reset(dev);
1796 }
1797 
ethtool_get_link(struct net_device * dev,char __user * useraddr)1798 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1799 {
1800 	struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1801 	int link = __ethtool_get_link(dev);
1802 
1803 	if (link < 0)
1804 		return link;
1805 
1806 	edata.data = link;
1807 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1808 		return -EFAULT;
1809 	return 0;
1810 }
1811 
ethtool_get_any_eeprom(struct net_device * dev,void __user * useraddr,int (* getter)(struct net_device *,struct ethtool_eeprom *,u8 *),u32 total_len)1812 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1813 				  int (*getter)(struct net_device *,
1814 						struct ethtool_eeprom *, u8 *),
1815 				  u32 total_len)
1816 {
1817 	struct ethtool_eeprom eeprom;
1818 	void __user *userbuf = useraddr + sizeof(eeprom);
1819 	u32 bytes_remaining;
1820 	u8 *data;
1821 	int ret = 0;
1822 
1823 	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1824 		return -EFAULT;
1825 
1826 	/* Check for wrap and zero */
1827 	if (eeprom.offset + eeprom.len <= eeprom.offset)
1828 		return -EINVAL;
1829 
1830 	/* Check for exceeding total eeprom len */
1831 	if (eeprom.offset + eeprom.len > total_len)
1832 		return -EINVAL;
1833 
1834 	data = kzalloc(PAGE_SIZE, GFP_USER);
1835 	if (!data)
1836 		return -ENOMEM;
1837 
1838 	bytes_remaining = eeprom.len;
1839 	while (bytes_remaining > 0) {
1840 		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1841 
1842 		ret = getter(dev, &eeprom, data);
1843 		if (ret)
1844 			break;
1845 		if (!eeprom.len) {
1846 			ret = -EIO;
1847 			break;
1848 		}
1849 		if (copy_to_user(userbuf, data, eeprom.len)) {
1850 			ret = -EFAULT;
1851 			break;
1852 		}
1853 		userbuf += eeprom.len;
1854 		eeprom.offset += eeprom.len;
1855 		bytes_remaining -= eeprom.len;
1856 	}
1857 
1858 	eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1859 	eeprom.offset -= eeprom.len;
1860 	if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1861 		ret = -EFAULT;
1862 
1863 	kfree(data);
1864 	return ret;
1865 }
1866 
ethtool_get_eeprom(struct net_device * dev,void __user * useraddr)1867 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1868 {
1869 	const struct ethtool_ops *ops = dev->ethtool_ops;
1870 
1871 	if (!ops->get_eeprom || !ops->get_eeprom_len ||
1872 	    !ops->get_eeprom_len(dev))
1873 		return -EOPNOTSUPP;
1874 
1875 	return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1876 				      ops->get_eeprom_len(dev));
1877 }
1878 
ethtool_set_eeprom(struct net_device * dev,void __user * useraddr)1879 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1880 {
1881 	struct ethtool_eeprom eeprom;
1882 	const struct ethtool_ops *ops = dev->ethtool_ops;
1883 	void __user *userbuf = useraddr + sizeof(eeprom);
1884 	u32 bytes_remaining;
1885 	u8 *data;
1886 	int ret = 0;
1887 
1888 	if (!ops->set_eeprom || !ops->get_eeprom_len ||
1889 	    !ops->get_eeprom_len(dev))
1890 		return -EOPNOTSUPP;
1891 
1892 	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1893 		return -EFAULT;
1894 
1895 	/* Check for wrap and zero */
1896 	if (eeprom.offset + eeprom.len <= eeprom.offset)
1897 		return -EINVAL;
1898 
1899 	/* Check for exceeding total eeprom len */
1900 	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1901 		return -EINVAL;
1902 
1903 	data = kzalloc(PAGE_SIZE, GFP_USER);
1904 	if (!data)
1905 		return -ENOMEM;
1906 
1907 	bytes_remaining = eeprom.len;
1908 	while (bytes_remaining > 0) {
1909 		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1910 
1911 		if (copy_from_user(data, userbuf, eeprom.len)) {
1912 			ret = -EFAULT;
1913 			break;
1914 		}
1915 		ret = ops->set_eeprom(dev, &eeprom, data);
1916 		if (ret)
1917 			break;
1918 		userbuf += eeprom.len;
1919 		eeprom.offset += eeprom.len;
1920 		bytes_remaining -= eeprom.len;
1921 	}
1922 
1923 	kfree(data);
1924 	return ret;
1925 }
1926 
ethtool_get_coalesce(struct net_device * dev,void __user * useraddr)1927 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1928 						   void __user *useraddr)
1929 {
1930 	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1931 	struct kernel_ethtool_coalesce kernel_coalesce = {};
1932 	int ret;
1933 
1934 	if (!dev->ethtool_ops->get_coalesce)
1935 		return -EOPNOTSUPP;
1936 
1937 	ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1938 					     NULL);
1939 	if (ret)
1940 		return ret;
1941 
1942 	if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1943 		return -EFAULT;
1944 	return 0;
1945 }
1946 
1947 static bool
ethtool_set_coalesce_supported(struct net_device * dev,struct ethtool_coalesce * coalesce)1948 ethtool_set_coalesce_supported(struct net_device *dev,
1949 			       struct ethtool_coalesce *coalesce)
1950 {
1951 	u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1952 	u32 nonzero_params = 0;
1953 
1954 	if (coalesce->rx_coalesce_usecs)
1955 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1956 	if (coalesce->rx_max_coalesced_frames)
1957 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1958 	if (coalesce->rx_coalesce_usecs_irq)
1959 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1960 	if (coalesce->rx_max_coalesced_frames_irq)
1961 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1962 	if (coalesce->tx_coalesce_usecs)
1963 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1964 	if (coalesce->tx_max_coalesced_frames)
1965 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1966 	if (coalesce->tx_coalesce_usecs_irq)
1967 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1968 	if (coalesce->tx_max_coalesced_frames_irq)
1969 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1970 	if (coalesce->stats_block_coalesce_usecs)
1971 		nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1972 	if (coalesce->use_adaptive_rx_coalesce)
1973 		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1974 	if (coalesce->use_adaptive_tx_coalesce)
1975 		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1976 	if (coalesce->pkt_rate_low)
1977 		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1978 	if (coalesce->rx_coalesce_usecs_low)
1979 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1980 	if (coalesce->rx_max_coalesced_frames_low)
1981 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1982 	if (coalesce->tx_coalesce_usecs_low)
1983 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1984 	if (coalesce->tx_max_coalesced_frames_low)
1985 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1986 	if (coalesce->pkt_rate_high)
1987 		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1988 	if (coalesce->rx_coalesce_usecs_high)
1989 		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1990 	if (coalesce->rx_max_coalesced_frames_high)
1991 		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1992 	if (coalesce->tx_coalesce_usecs_high)
1993 		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1994 	if (coalesce->tx_max_coalesced_frames_high)
1995 		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1996 	if (coalesce->rate_sample_interval)
1997 		nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1998 
1999 	return (supported_params & nonzero_params) == nonzero_params;
2000 }
2001 
ethtool_set_coalesce(struct net_device * dev,void __user * useraddr)2002 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
2003 						   void __user *useraddr)
2004 {
2005 	struct kernel_ethtool_coalesce kernel_coalesce = {};
2006 	struct ethtool_coalesce coalesce;
2007 	int ret;
2008 
2009 	if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
2010 		return -EOPNOTSUPP;
2011 
2012 	ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
2013 					     NULL);
2014 	if (ret)
2015 		return ret;
2016 
2017 	if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
2018 		return -EFAULT;
2019 
2020 	if (!ethtool_set_coalesce_supported(dev, &coalesce))
2021 		return -EOPNOTSUPP;
2022 
2023 	ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
2024 					     NULL);
2025 	if (!ret)
2026 		ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
2027 	return ret;
2028 }
2029 
ethtool_get_ringparam(struct net_device * dev,void __user * useraddr)2030 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
2031 {
2032 	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
2033 	struct kernel_ethtool_ringparam kernel_ringparam = {};
2034 
2035 	if (!dev->ethtool_ops->get_ringparam)
2036 		return -EOPNOTSUPP;
2037 
2038 	dev->ethtool_ops->get_ringparam(dev, &ringparam,
2039 					&kernel_ringparam, NULL);
2040 
2041 	if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
2042 		return -EFAULT;
2043 	return 0;
2044 }
2045 
ethtool_set_ringparam(struct net_device * dev,void __user * useraddr)2046 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
2047 {
2048 	struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
2049 	struct kernel_ethtool_ringparam kernel_ringparam;
2050 	int ret;
2051 
2052 	if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
2053 		return -EOPNOTSUPP;
2054 
2055 	if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
2056 		return -EFAULT;
2057 
2058 	dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
2059 
2060 	/* ensure new ring parameters are within the maximums */
2061 	if (ringparam.rx_pending > max.rx_max_pending ||
2062 	    ringparam.rx_mini_pending > max.rx_mini_max_pending ||
2063 	    ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
2064 	    ringparam.tx_pending > max.tx_max_pending)
2065 		return -EINVAL;
2066 
2067 	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
2068 					      &kernel_ringparam, NULL);
2069 	if (!ret)
2070 		ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
2071 	return ret;
2072 }
2073 
ethtool_get_channels(struct net_device * dev,void __user * useraddr)2074 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
2075 						   void __user *useraddr)
2076 {
2077 	struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
2078 
2079 	if (!dev->ethtool_ops->get_channels)
2080 		return -EOPNOTSUPP;
2081 
2082 	dev->ethtool_ops->get_channels(dev, &channels);
2083 
2084 	if (copy_to_user(useraddr, &channels, sizeof(channels)))
2085 		return -EFAULT;
2086 	return 0;
2087 }
2088 
ethtool_set_channels(struct net_device * dev,void __user * useraddr)2089 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
2090 						   void __user *useraddr)
2091 {
2092 	struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
2093 	u16 from_channel, to_channel;
2094 	unsigned int i;
2095 	int ret;
2096 
2097 	if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
2098 		return -EOPNOTSUPP;
2099 
2100 	if (copy_from_user(&channels, useraddr, sizeof(channels)))
2101 		return -EFAULT;
2102 
2103 	dev->ethtool_ops->get_channels(dev, &curr);
2104 
2105 	if (channels.rx_count == curr.rx_count &&
2106 	    channels.tx_count == curr.tx_count &&
2107 	    channels.combined_count == curr.combined_count &&
2108 	    channels.other_count == curr.other_count)
2109 		return 0;
2110 
2111 	/* ensure new counts are within the maximums */
2112 	if (channels.rx_count > curr.max_rx ||
2113 	    channels.tx_count > curr.max_tx ||
2114 	    channels.combined_count > curr.max_combined ||
2115 	    channels.other_count > curr.max_other)
2116 		return -EINVAL;
2117 
2118 	/* ensure there is at least one RX and one TX channel */
2119 	if (!channels.combined_count &&
2120 	    (!channels.rx_count || !channels.tx_count))
2121 		return -EINVAL;
2122 
2123 	ret = ethtool_check_max_channel(dev, channels, NULL);
2124 	if (ret)
2125 		return ret;
2126 
2127 	/* Disabling channels, query zero-copy AF_XDP sockets */
2128 	from_channel = channels.combined_count +
2129 		min(channels.rx_count, channels.tx_count);
2130 	to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
2131 	for (i = from_channel; i < to_channel; i++)
2132 		if (xsk_get_pool_from_qid(dev, i))
2133 			return -EINVAL;
2134 
2135 	ret = dev->ethtool_ops->set_channels(dev, &channels);
2136 	if (!ret)
2137 		ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
2138 	return ret;
2139 }
2140 
ethtool_get_pauseparam(struct net_device * dev,void __user * useraddr)2141 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
2142 {
2143 	struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
2144 
2145 	if (!dev->ethtool_ops->get_pauseparam)
2146 		return -EOPNOTSUPP;
2147 
2148 	dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
2149 
2150 	if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
2151 		return -EFAULT;
2152 	return 0;
2153 }
2154 
ethtool_set_pauseparam(struct net_device * dev,void __user * useraddr)2155 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
2156 {
2157 	struct ethtool_pauseparam pauseparam;
2158 	int ret;
2159 
2160 	if (!dev->ethtool_ops->set_pauseparam)
2161 		return -EOPNOTSUPP;
2162 
2163 	if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
2164 		return -EFAULT;
2165 
2166 	ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
2167 	if (!ret)
2168 		ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
2169 	return ret;
2170 }
2171 
ethtool_self_test(struct net_device * dev,char __user * useraddr)2172 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
2173 {
2174 	struct ethtool_test test;
2175 	const struct ethtool_ops *ops = dev->ethtool_ops;
2176 	u64 *data;
2177 	int ret, test_len;
2178 
2179 	if (!ops->self_test || !ops->get_sset_count)
2180 		return -EOPNOTSUPP;
2181 
2182 	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
2183 	if (test_len < 0)
2184 		return test_len;
2185 	WARN_ON(test_len == 0);
2186 
2187 	if (copy_from_user(&test, useraddr, sizeof(test)))
2188 		return -EFAULT;
2189 
2190 	test.len = test_len;
2191 	data = kcalloc(test_len, sizeof(u64), GFP_USER);
2192 	if (!data)
2193 		return -ENOMEM;
2194 
2195 	netif_testing_on(dev);
2196 	ops->self_test(dev, &test, data);
2197 	netif_testing_off(dev);
2198 
2199 	ret = -EFAULT;
2200 	if (copy_to_user(useraddr, &test, sizeof(test)))
2201 		goto out;
2202 	useraddr += sizeof(test);
2203 	if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
2204 		goto out;
2205 	ret = 0;
2206 
2207  out:
2208 	kfree(data);
2209 	return ret;
2210 }
2211 
ethtool_get_strings(struct net_device * dev,void __user * useraddr)2212 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
2213 {
2214 	struct ethtool_gstrings gstrings;
2215 	u8 *data;
2216 	int ret;
2217 
2218 	if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
2219 		return -EFAULT;
2220 
2221 	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
2222 	if (ret < 0)
2223 		return ret;
2224 	if (ret > S32_MAX / ETH_GSTRING_LEN)
2225 		return -ENOMEM;
2226 	WARN_ON_ONCE(!ret);
2227 
2228 	gstrings.len = ret;
2229 
2230 	if (gstrings.len) {
2231 		data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2232 		if (!data)
2233 			return -ENOMEM;
2234 
2235 		__ethtool_get_strings(dev, gstrings.string_set, data);
2236 	} else {
2237 		data = NULL;
2238 	}
2239 
2240 	ret = -EFAULT;
2241 	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2242 		goto out;
2243 	useraddr += sizeof(gstrings);
2244 	if (gstrings.len &&
2245 	    copy_to_user(useraddr, data,
2246 			 array_size(gstrings.len, ETH_GSTRING_LEN)))
2247 		goto out;
2248 	ret = 0;
2249 
2250 out:
2251 	vfree(data);
2252 	return ret;
2253 }
2254 
ethtool_sprintf(u8 ** data,const char * fmt,...)2255 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2256 {
2257 	va_list args;
2258 
2259 	va_start(args, fmt);
2260 	vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2261 	va_end(args);
2262 
2263 	*data += ETH_GSTRING_LEN;
2264 }
2265 EXPORT_SYMBOL(ethtool_sprintf);
2266 
ethtool_puts(u8 ** data,const char * str)2267 void ethtool_puts(u8 **data, const char *str)
2268 {
2269 	strscpy(*data, str, ETH_GSTRING_LEN);
2270 	*data += ETH_GSTRING_LEN;
2271 }
2272 EXPORT_SYMBOL(ethtool_puts);
2273 
ethtool_phys_id(struct net_device * dev,void __user * useraddr)2274 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2275 {
2276 	struct ethtool_value id;
2277 	static bool busy;
2278 	const struct ethtool_ops *ops = dev->ethtool_ops;
2279 	netdevice_tracker dev_tracker;
2280 	int rc;
2281 
2282 	if (!ops->set_phys_id)
2283 		return -EOPNOTSUPP;
2284 
2285 	if (busy)
2286 		return -EBUSY;
2287 
2288 	if (copy_from_user(&id, useraddr, sizeof(id)))
2289 		return -EFAULT;
2290 
2291 	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2292 	if (rc < 0)
2293 		return rc;
2294 
2295 	/* Drop the RTNL lock while waiting, but prevent reentry or
2296 	 * removal of the device.
2297 	 */
2298 	busy = true;
2299 	netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2300 	rtnl_unlock();
2301 
2302 	if (rc == 0) {
2303 		/* Driver will handle this itself */
2304 		schedule_timeout_interruptible(
2305 			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2306 	} else {
2307 		/* Driver expects to be called at twice the frequency in rc */
2308 		int n = rc * 2, interval = HZ / n;
2309 		u64 count = mul_u32_u32(n, id.data);
2310 		u64 i = 0;
2311 
2312 		do {
2313 			rtnl_lock();
2314 			rc = ops->set_phys_id(dev,
2315 				    (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2316 			rtnl_unlock();
2317 			if (rc)
2318 				break;
2319 			schedule_timeout_interruptible(interval);
2320 		} while (!signal_pending(current) && (!id.data || i < count));
2321 	}
2322 
2323 	rtnl_lock();
2324 	netdev_put(dev, &dev_tracker);
2325 	busy = false;
2326 
2327 	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2328 	return rc;
2329 }
2330 
ethtool_get_stats(struct net_device * dev,void __user * useraddr)2331 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2332 {
2333 	struct ethtool_stats stats;
2334 	const struct ethtool_ops *ops = dev->ethtool_ops;
2335 	u64 *data;
2336 	int ret, n_stats;
2337 
2338 	if (!ops->get_ethtool_stats || !ops->get_sset_count)
2339 		return -EOPNOTSUPP;
2340 
2341 	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2342 	if (n_stats < 0)
2343 		return n_stats;
2344 	if (n_stats > S32_MAX / sizeof(u64))
2345 		return -ENOMEM;
2346 	WARN_ON_ONCE(!n_stats);
2347 	if (copy_from_user(&stats, useraddr, sizeof(stats)))
2348 		return -EFAULT;
2349 
2350 	stats.n_stats = n_stats;
2351 
2352 	if (n_stats) {
2353 		data = vzalloc(array_size(n_stats, sizeof(u64)));
2354 		if (!data)
2355 			return -ENOMEM;
2356 		ops->get_ethtool_stats(dev, &stats, data);
2357 	} else {
2358 		data = NULL;
2359 	}
2360 
2361 	ret = -EFAULT;
2362 	if (copy_to_user(useraddr, &stats, sizeof(stats)))
2363 		goto out;
2364 	useraddr += sizeof(stats);
2365 	if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2366 		goto out;
2367 	ret = 0;
2368 
2369  out:
2370 	vfree(data);
2371 	return ret;
2372 }
2373 
ethtool_vzalloc_stats_array(int n_stats,u64 ** data)2374 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2375 {
2376 	if (n_stats < 0)
2377 		return n_stats;
2378 	if (n_stats > S32_MAX / sizeof(u64))
2379 		return -ENOMEM;
2380 	if (WARN_ON_ONCE(!n_stats))
2381 		return -EOPNOTSUPP;
2382 
2383 	*data = vzalloc(array_size(n_stats, sizeof(u64)));
2384 	if (!*data)
2385 		return -ENOMEM;
2386 
2387 	return 0;
2388 }
2389 
ethtool_get_phy_stats_phydev(struct phy_device * phydev,struct ethtool_stats * stats,u64 ** data)2390 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2391 					 struct ethtool_stats *stats,
2392 					 u64 **data)
2393  {
2394 	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2395 	int n_stats, ret;
2396 
2397 	if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2398 		return -EOPNOTSUPP;
2399 
2400 	n_stats = phy_ops->get_sset_count(phydev);
2401 
2402 	ret = ethtool_vzalloc_stats_array(n_stats, data);
2403 	if (ret)
2404 		return ret;
2405 
2406 	stats->n_stats = n_stats;
2407 	return phy_ops->get_stats(phydev, stats, *data);
2408 }
2409 
ethtool_get_phy_stats_ethtool(struct net_device * dev,struct ethtool_stats * stats,u64 ** data)2410 static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2411 					  struct ethtool_stats *stats,
2412 					  u64 **data)
2413 {
2414 	const struct ethtool_ops *ops = dev->ethtool_ops;
2415 	int n_stats, ret;
2416 
2417 	if (!ops || !ops->get_sset_count || !ops->get_ethtool_phy_stats)
2418 		return -EOPNOTSUPP;
2419 
2420 	n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2421 
2422 	ret = ethtool_vzalloc_stats_array(n_stats, data);
2423 	if (ret)
2424 		return ret;
2425 
2426 	stats->n_stats = n_stats;
2427 	ops->get_ethtool_phy_stats(dev, stats, *data);
2428 
2429 	return 0;
2430 }
2431 
ethtool_get_phy_stats(struct net_device * dev,void __user * useraddr)2432 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2433 {
2434 	struct phy_device *phydev = dev->phydev;
2435 	struct ethtool_stats stats;
2436 	u64 *data = NULL;
2437 	int ret = -EOPNOTSUPP;
2438 
2439 	if (copy_from_user(&stats, useraddr, sizeof(stats)))
2440 		return -EFAULT;
2441 
2442 	if (phydev)
2443 		ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2444 
2445 	if (ret == -EOPNOTSUPP)
2446 		ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2447 
2448 	if (ret)
2449 		goto out;
2450 
2451 	if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2452 		ret = -EFAULT;
2453 		goto out;
2454 	}
2455 
2456 	useraddr += sizeof(stats);
2457 	if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2458 		ret = -EFAULT;
2459 
2460  out:
2461 	vfree(data);
2462 	return ret;
2463 }
2464 
ethtool_get_perm_addr(struct net_device * dev,void __user * useraddr)2465 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2466 {
2467 	struct ethtool_perm_addr epaddr;
2468 
2469 	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2470 		return -EFAULT;
2471 
2472 	if (epaddr.size < dev->addr_len)
2473 		return -ETOOSMALL;
2474 	epaddr.size = dev->addr_len;
2475 
2476 	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2477 		return -EFAULT;
2478 	useraddr += sizeof(epaddr);
2479 	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2480 		return -EFAULT;
2481 	return 0;
2482 }
2483 
ethtool_get_value(struct net_device * dev,char __user * useraddr,u32 cmd,u32 (* actor)(struct net_device *))2484 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2485 			     u32 cmd, u32 (*actor)(struct net_device *))
2486 {
2487 	struct ethtool_value edata = { .cmd = cmd };
2488 
2489 	if (!actor)
2490 		return -EOPNOTSUPP;
2491 
2492 	edata.data = actor(dev);
2493 
2494 	if (copy_to_user(useraddr, &edata, sizeof(edata)))
2495 		return -EFAULT;
2496 	return 0;
2497 }
2498 
ethtool_set_value_void(struct net_device * dev,char __user * useraddr,void (* actor)(struct net_device *,u32))2499 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2500 			     void (*actor)(struct net_device *, u32))
2501 {
2502 	struct ethtool_value edata;
2503 
2504 	if (!actor)
2505 		return -EOPNOTSUPP;
2506 
2507 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
2508 		return -EFAULT;
2509 
2510 	actor(dev, edata.data);
2511 	return 0;
2512 }
2513 
ethtool_set_value(struct net_device * dev,char __user * useraddr,int (* actor)(struct net_device *,u32))2514 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2515 			     int (*actor)(struct net_device *, u32))
2516 {
2517 	struct ethtool_value edata;
2518 
2519 	if (!actor)
2520 		return -EOPNOTSUPP;
2521 
2522 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
2523 		return -EFAULT;
2524 
2525 	return actor(dev, edata.data);
2526 }
2527 
2528 static int
ethtool_flash_device(struct net_device * dev,struct ethtool_devlink_compat * req)2529 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2530 {
2531 	if (!dev->ethtool_ops->flash_device) {
2532 		req->devlink = netdev_to_devlink_get(dev);
2533 		return 0;
2534 	}
2535 
2536 	return dev->ethtool_ops->flash_device(dev, &req->efl);
2537 }
2538 
ethtool_set_dump(struct net_device * dev,void __user * useraddr)2539 static int ethtool_set_dump(struct net_device *dev,
2540 			void __user *useraddr)
2541 {
2542 	struct ethtool_dump dump;
2543 
2544 	if (!dev->ethtool_ops->set_dump)
2545 		return -EOPNOTSUPP;
2546 
2547 	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2548 		return -EFAULT;
2549 
2550 	return dev->ethtool_ops->set_dump(dev, &dump);
2551 }
2552 
ethtool_get_dump_flag(struct net_device * dev,void __user * useraddr)2553 static int ethtool_get_dump_flag(struct net_device *dev,
2554 				void __user *useraddr)
2555 {
2556 	int ret;
2557 	struct ethtool_dump dump;
2558 	const struct ethtool_ops *ops = dev->ethtool_ops;
2559 
2560 	if (!ops->get_dump_flag)
2561 		return -EOPNOTSUPP;
2562 
2563 	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2564 		return -EFAULT;
2565 
2566 	ret = ops->get_dump_flag(dev, &dump);
2567 	if (ret)
2568 		return ret;
2569 
2570 	if (copy_to_user(useraddr, &dump, sizeof(dump)))
2571 		return -EFAULT;
2572 	return 0;
2573 }
2574 
ethtool_get_dump_data(struct net_device * dev,void __user * useraddr)2575 static int ethtool_get_dump_data(struct net_device *dev,
2576 				void __user *useraddr)
2577 {
2578 	int ret;
2579 	__u32 len;
2580 	struct ethtool_dump dump, tmp;
2581 	const struct ethtool_ops *ops = dev->ethtool_ops;
2582 	void *data = NULL;
2583 
2584 	if (!ops->get_dump_data || !ops->get_dump_flag)
2585 		return -EOPNOTSUPP;
2586 
2587 	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2588 		return -EFAULT;
2589 
2590 	memset(&tmp, 0, sizeof(tmp));
2591 	tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2592 	ret = ops->get_dump_flag(dev, &tmp);
2593 	if (ret)
2594 		return ret;
2595 
2596 	len = min(tmp.len, dump.len);
2597 	if (!len)
2598 		return -EFAULT;
2599 
2600 	/* Don't ever let the driver think there's more space available
2601 	 * than it requested with .get_dump_flag().
2602 	 */
2603 	dump.len = len;
2604 
2605 	/* Always allocate enough space to hold the whole thing so that the
2606 	 * driver does not need to check the length and bother with partial
2607 	 * dumping.
2608 	 */
2609 	data = vzalloc(tmp.len);
2610 	if (!data)
2611 		return -ENOMEM;
2612 	ret = ops->get_dump_data(dev, &dump, data);
2613 	if (ret)
2614 		goto out;
2615 
2616 	/* There are two sane possibilities:
2617 	 * 1. The driver's .get_dump_data() does not touch dump.len.
2618 	 * 2. Or it may set dump.len to how much it really writes, which
2619 	 *    should be tmp.len (or len if it can do a partial dump).
2620 	 * In any case respond to userspace with the actual length of data
2621 	 * it's receiving.
2622 	 */
2623 	WARN_ON(dump.len != len && dump.len != tmp.len);
2624 	dump.len = len;
2625 
2626 	if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2627 		ret = -EFAULT;
2628 		goto out;
2629 	}
2630 	useraddr += offsetof(struct ethtool_dump, data);
2631 	if (copy_to_user(useraddr, data, len))
2632 		ret = -EFAULT;
2633 out:
2634 	vfree(data);
2635 	return ret;
2636 }
2637 
ethtool_get_ts_info(struct net_device * dev,void __user * useraddr)2638 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2639 {
2640 	struct kernel_ethtool_ts_info kernel_info;
2641 	struct ethtool_ts_info info = {};
2642 	int err;
2643 
2644 	err = __ethtool_get_ts_info(dev, &kernel_info);
2645 	if (err)
2646 		return err;
2647 
2648 	info.cmd = kernel_info.cmd;
2649 	info.so_timestamping = kernel_info.so_timestamping;
2650 	info.phc_index = kernel_info.phc_index;
2651 	info.tx_types = kernel_info.tx_types;
2652 	info.rx_filters = kernel_info.rx_filters;
2653 
2654 	if (copy_to_user(useraddr, &info, sizeof(info)))
2655 		return -EFAULT;
2656 
2657 	return 0;
2658 }
2659 
ethtool_get_module_info_call(struct net_device * dev,struct ethtool_modinfo * modinfo)2660 int ethtool_get_module_info_call(struct net_device *dev,
2661 				 struct ethtool_modinfo *modinfo)
2662 {
2663 	const struct ethtool_ops *ops = dev->ethtool_ops;
2664 	struct phy_device *phydev = dev->phydev;
2665 
2666 	if (dev->ethtool->module_fw_flash_in_progress)
2667 		return -EBUSY;
2668 
2669 	if (dev->sfp_bus)
2670 		return sfp_get_module_info(dev->sfp_bus, modinfo);
2671 
2672 	if (phydev && phydev->drv && phydev->drv->module_info)
2673 		return phydev->drv->module_info(phydev, modinfo);
2674 
2675 	if (ops->get_module_info)
2676 		return ops->get_module_info(dev, modinfo);
2677 
2678 	return -EOPNOTSUPP;
2679 }
2680 
ethtool_get_module_info(struct net_device * dev,void __user * useraddr)2681 static int ethtool_get_module_info(struct net_device *dev,
2682 				   void __user *useraddr)
2683 {
2684 	int ret;
2685 	struct ethtool_modinfo modinfo;
2686 
2687 	if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2688 		return -EFAULT;
2689 
2690 	ret = ethtool_get_module_info_call(dev, &modinfo);
2691 	if (ret)
2692 		return ret;
2693 
2694 	if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2695 		return -EFAULT;
2696 
2697 	return 0;
2698 }
2699 
ethtool_get_module_eeprom_call(struct net_device * dev,struct ethtool_eeprom * ee,u8 * data)2700 int ethtool_get_module_eeprom_call(struct net_device *dev,
2701 				   struct ethtool_eeprom *ee, u8 *data)
2702 {
2703 	const struct ethtool_ops *ops = dev->ethtool_ops;
2704 	struct phy_device *phydev = dev->phydev;
2705 
2706 	if (dev->ethtool->module_fw_flash_in_progress)
2707 		return -EBUSY;
2708 
2709 	if (dev->sfp_bus)
2710 		return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2711 
2712 	if (phydev && phydev->drv && phydev->drv->module_eeprom)
2713 		return phydev->drv->module_eeprom(phydev, ee, data);
2714 
2715 	if (ops->get_module_eeprom)
2716 		return ops->get_module_eeprom(dev, ee, data);
2717 
2718 	return -EOPNOTSUPP;
2719 }
2720 
ethtool_get_module_eeprom(struct net_device * dev,void __user * useraddr)2721 static int ethtool_get_module_eeprom(struct net_device *dev,
2722 				     void __user *useraddr)
2723 {
2724 	int ret;
2725 	struct ethtool_modinfo modinfo;
2726 
2727 	ret = ethtool_get_module_info_call(dev, &modinfo);
2728 	if (ret)
2729 		return ret;
2730 
2731 	return ethtool_get_any_eeprom(dev, useraddr,
2732 				      ethtool_get_module_eeprom_call,
2733 				      modinfo.eeprom_len);
2734 }
2735 
ethtool_tunable_valid(const struct ethtool_tunable * tuna)2736 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2737 {
2738 	switch (tuna->id) {
2739 	case ETHTOOL_RX_COPYBREAK:
2740 	case ETHTOOL_TX_COPYBREAK:
2741 	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2742 		if (tuna->len != sizeof(u32) ||
2743 		    tuna->type_id != ETHTOOL_TUNABLE_U32)
2744 			return -EINVAL;
2745 		break;
2746 	case ETHTOOL_PFC_PREVENTION_TOUT:
2747 		if (tuna->len != sizeof(u16) ||
2748 		    tuna->type_id != ETHTOOL_TUNABLE_U16)
2749 			return -EINVAL;
2750 		break;
2751 	default:
2752 		return -EINVAL;
2753 	}
2754 
2755 	return 0;
2756 }
2757 
ethtool_get_tunable(struct net_device * dev,void __user * useraddr)2758 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2759 {
2760 	int ret;
2761 	struct ethtool_tunable tuna;
2762 	const struct ethtool_ops *ops = dev->ethtool_ops;
2763 	void *data;
2764 
2765 	if (!ops->get_tunable)
2766 		return -EOPNOTSUPP;
2767 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2768 		return -EFAULT;
2769 	ret = ethtool_tunable_valid(&tuna);
2770 	if (ret)
2771 		return ret;
2772 	data = kzalloc(tuna.len, GFP_USER);
2773 	if (!data)
2774 		return -ENOMEM;
2775 	ret = ops->get_tunable(dev, &tuna, data);
2776 	if (ret)
2777 		goto out;
2778 	useraddr += sizeof(tuna);
2779 	ret = -EFAULT;
2780 	if (copy_to_user(useraddr, data, tuna.len))
2781 		goto out;
2782 	ret = 0;
2783 
2784 out:
2785 	kfree(data);
2786 	return ret;
2787 }
2788 
ethtool_set_tunable(struct net_device * dev,void __user * useraddr)2789 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2790 {
2791 	int ret;
2792 	struct ethtool_tunable tuna;
2793 	const struct ethtool_ops *ops = dev->ethtool_ops;
2794 	void *data;
2795 
2796 	if (!ops->set_tunable)
2797 		return -EOPNOTSUPP;
2798 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2799 		return -EFAULT;
2800 	ret = ethtool_tunable_valid(&tuna);
2801 	if (ret)
2802 		return ret;
2803 	useraddr += sizeof(tuna);
2804 	data = memdup_user(useraddr, tuna.len);
2805 	if (IS_ERR(data))
2806 		return PTR_ERR(data);
2807 	ret = ops->set_tunable(dev, &tuna, data);
2808 
2809 	kfree(data);
2810 	return ret;
2811 }
2812 
2813 static noinline_for_stack int
ethtool_get_per_queue_coalesce(struct net_device * dev,void __user * useraddr,struct ethtool_per_queue_op * per_queue_opt)2814 ethtool_get_per_queue_coalesce(struct net_device *dev,
2815 			       void __user *useraddr,
2816 			       struct ethtool_per_queue_op *per_queue_opt)
2817 {
2818 	u32 bit;
2819 	int ret;
2820 	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2821 
2822 	if (!dev->ethtool_ops->get_per_queue_coalesce)
2823 		return -EOPNOTSUPP;
2824 
2825 	useraddr += sizeof(*per_queue_opt);
2826 
2827 	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2828 			  MAX_NUM_QUEUE);
2829 
2830 	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2831 		struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2832 
2833 		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2834 		if (ret != 0)
2835 			return ret;
2836 		if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2837 			return -EFAULT;
2838 		useraddr += sizeof(coalesce);
2839 	}
2840 
2841 	return 0;
2842 }
2843 
2844 static noinline_for_stack int
ethtool_set_per_queue_coalesce(struct net_device * dev,void __user * useraddr,struct ethtool_per_queue_op * per_queue_opt)2845 ethtool_set_per_queue_coalesce(struct net_device *dev,
2846 			       void __user *useraddr,
2847 			       struct ethtool_per_queue_op *per_queue_opt)
2848 {
2849 	u32 bit;
2850 	int i, ret = 0;
2851 	int n_queue;
2852 	struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2853 	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2854 
2855 	if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2856 	    (!dev->ethtool_ops->get_per_queue_coalesce))
2857 		return -EOPNOTSUPP;
2858 
2859 	useraddr += sizeof(*per_queue_opt);
2860 
2861 	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2862 	n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2863 	tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2864 	if (!backup)
2865 		return -ENOMEM;
2866 
2867 	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2868 		struct ethtool_coalesce coalesce;
2869 
2870 		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2871 		if (ret != 0)
2872 			goto roll_back;
2873 
2874 		tmp++;
2875 
2876 		if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2877 			ret = -EFAULT;
2878 			goto roll_back;
2879 		}
2880 
2881 		if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2882 			ret = -EOPNOTSUPP;
2883 			goto roll_back;
2884 		}
2885 
2886 		ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2887 		if (ret != 0)
2888 			goto roll_back;
2889 
2890 		useraddr += sizeof(coalesce);
2891 	}
2892 
2893 roll_back:
2894 	if (ret != 0) {
2895 		tmp = backup;
2896 		for_each_set_bit(i, queue_mask, bit) {
2897 			dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2898 			tmp++;
2899 		}
2900 	}
2901 	kfree(backup);
2902 
2903 	return ret;
2904 }
2905 
ethtool_set_per_queue(struct net_device * dev,void __user * useraddr,u32 sub_cmd)2906 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2907 				 void __user *useraddr, u32 sub_cmd)
2908 {
2909 	struct ethtool_per_queue_op per_queue_opt;
2910 
2911 	if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2912 		return -EFAULT;
2913 
2914 	if (per_queue_opt.sub_command != sub_cmd)
2915 		return -EINVAL;
2916 
2917 	switch (per_queue_opt.sub_command) {
2918 	case ETHTOOL_GCOALESCE:
2919 		return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2920 	case ETHTOOL_SCOALESCE:
2921 		return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2922 	default:
2923 		return -EOPNOTSUPP;
2924 	}
2925 }
2926 
ethtool_phy_tunable_valid(const struct ethtool_tunable * tuna)2927 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2928 {
2929 	switch (tuna->id) {
2930 	case ETHTOOL_PHY_DOWNSHIFT:
2931 	case ETHTOOL_PHY_FAST_LINK_DOWN:
2932 		if (tuna->len != sizeof(u8) ||
2933 		    tuna->type_id != ETHTOOL_TUNABLE_U8)
2934 			return -EINVAL;
2935 		break;
2936 	case ETHTOOL_PHY_EDPD:
2937 		if (tuna->len != sizeof(u16) ||
2938 		    tuna->type_id != ETHTOOL_TUNABLE_U16)
2939 			return -EINVAL;
2940 		break;
2941 	default:
2942 		return -EINVAL;
2943 	}
2944 
2945 	return 0;
2946 }
2947 
get_phy_tunable(struct net_device * dev,void __user * useraddr)2948 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2949 {
2950 	struct phy_device *phydev = dev->phydev;
2951 	struct ethtool_tunable tuna;
2952 	bool phy_drv_tunable;
2953 	void *data;
2954 	int ret;
2955 
2956 	phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2957 	if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2958 		return -EOPNOTSUPP;
2959 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2960 		return -EFAULT;
2961 	ret = ethtool_phy_tunable_valid(&tuna);
2962 	if (ret)
2963 		return ret;
2964 	data = kzalloc(tuna.len, GFP_USER);
2965 	if (!data)
2966 		return -ENOMEM;
2967 	if (phy_drv_tunable) {
2968 		mutex_lock(&phydev->lock);
2969 		ret = phydev->drv->get_tunable(phydev, &tuna, data);
2970 		mutex_unlock(&phydev->lock);
2971 	} else {
2972 		ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2973 	}
2974 	if (ret)
2975 		goto out;
2976 	useraddr += sizeof(tuna);
2977 	ret = -EFAULT;
2978 	if (copy_to_user(useraddr, data, tuna.len))
2979 		goto out;
2980 	ret = 0;
2981 
2982 out:
2983 	kfree(data);
2984 	return ret;
2985 }
2986 
set_phy_tunable(struct net_device * dev,void __user * useraddr)2987 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2988 {
2989 	struct phy_device *phydev = dev->phydev;
2990 	struct ethtool_tunable tuna;
2991 	bool phy_drv_tunable;
2992 	void *data;
2993 	int ret;
2994 
2995 	phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2996 	if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2997 		return -EOPNOTSUPP;
2998 	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2999 		return -EFAULT;
3000 	ret = ethtool_phy_tunable_valid(&tuna);
3001 	if (ret)
3002 		return ret;
3003 	useraddr += sizeof(tuna);
3004 	data = memdup_user(useraddr, tuna.len);
3005 	if (IS_ERR(data))
3006 		return PTR_ERR(data);
3007 	if (phy_drv_tunable) {
3008 		mutex_lock(&phydev->lock);
3009 		ret = phydev->drv->set_tunable(phydev, &tuna, data);
3010 		mutex_unlock(&phydev->lock);
3011 	} else {
3012 		ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
3013 	}
3014 
3015 	kfree(data);
3016 	return ret;
3017 }
3018 
ethtool_get_fecparam(struct net_device * dev,void __user * useraddr)3019 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
3020 {
3021 	struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
3022 	int rc;
3023 
3024 	if (!dev->ethtool_ops->get_fecparam)
3025 		return -EOPNOTSUPP;
3026 
3027 	rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
3028 	if (rc)
3029 		return rc;
3030 
3031 	if (WARN_ON_ONCE(fecparam.reserved))
3032 		fecparam.reserved = 0;
3033 
3034 	if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
3035 		return -EFAULT;
3036 	return 0;
3037 }
3038 
ethtool_set_fecparam(struct net_device * dev,void __user * useraddr)3039 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
3040 {
3041 	struct ethtool_fecparam fecparam;
3042 
3043 	if (!dev->ethtool_ops->set_fecparam)
3044 		return -EOPNOTSUPP;
3045 
3046 	if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
3047 		return -EFAULT;
3048 
3049 	if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
3050 		return -EINVAL;
3051 
3052 	fecparam.active_fec = 0;
3053 	fecparam.reserved = 0;
3054 
3055 	return dev->ethtool_ops->set_fecparam(dev, &fecparam);
3056 }
3057 
3058 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
3059 
3060 static int
__dev_ethtool(struct net * net,struct ifreq * ifr,void __user * useraddr,u32 ethcmd,struct ethtool_devlink_compat * devlink_state)3061 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
3062 	      u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
3063 {
3064 	struct net_device *dev;
3065 	u32 sub_cmd;
3066 	int rc;
3067 	netdev_features_t old_features;
3068 
3069 	dev = __dev_get_by_name(net, ifr->ifr_name);
3070 	if (!dev)
3071 		return -ENODEV;
3072 
3073 	if (ethcmd == ETHTOOL_PERQUEUE) {
3074 		if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
3075 			return -EFAULT;
3076 	} else {
3077 		sub_cmd = ethcmd;
3078 	}
3079 	/* Allow some commands to be done by anyone */
3080 	switch (sub_cmd) {
3081 	case ETHTOOL_GSET:
3082 	case ETHTOOL_GDRVINFO:
3083 	case ETHTOOL_GMSGLVL:
3084 	case ETHTOOL_GLINK:
3085 	case ETHTOOL_GCOALESCE:
3086 	case ETHTOOL_GRINGPARAM:
3087 	case ETHTOOL_GPAUSEPARAM:
3088 	case ETHTOOL_GRXCSUM:
3089 	case ETHTOOL_GTXCSUM:
3090 	case ETHTOOL_GSG:
3091 	case ETHTOOL_GSSET_INFO:
3092 	case ETHTOOL_GSTRINGS:
3093 	case ETHTOOL_GSTATS:
3094 	case ETHTOOL_GPHYSTATS:
3095 	case ETHTOOL_GTSO:
3096 	case ETHTOOL_GPERMADDR:
3097 	case ETHTOOL_GUFO:
3098 	case ETHTOOL_GGSO:
3099 	case ETHTOOL_GGRO:
3100 	case ETHTOOL_GFLAGS:
3101 	case ETHTOOL_GPFLAGS:
3102 	case ETHTOOL_GRXFH:
3103 	case ETHTOOL_GRXRINGS:
3104 	case ETHTOOL_GRXCLSRLCNT:
3105 	case ETHTOOL_GRXCLSRULE:
3106 	case ETHTOOL_GRXCLSRLALL:
3107 	case ETHTOOL_GRXFHINDIR:
3108 	case ETHTOOL_GRSSH:
3109 	case ETHTOOL_GFEATURES:
3110 	case ETHTOOL_GCHANNELS:
3111 	case ETHTOOL_GET_TS_INFO:
3112 	case ETHTOOL_GEEE:
3113 	case ETHTOOL_GTUNABLE:
3114 	case ETHTOOL_PHY_GTUNABLE:
3115 	case ETHTOOL_GLINKSETTINGS:
3116 	case ETHTOOL_GFECPARAM:
3117 		break;
3118 	default:
3119 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
3120 			return -EPERM;
3121 	}
3122 
3123 	if (dev->dev.parent)
3124 		pm_runtime_get_sync(dev->dev.parent);
3125 
3126 	if (!netif_device_present(dev)) {
3127 		rc = -ENODEV;
3128 		goto out;
3129 	}
3130 
3131 	if (dev->ethtool_ops->begin) {
3132 		rc = dev->ethtool_ops->begin(dev);
3133 		if (rc < 0)
3134 			goto out;
3135 	}
3136 	old_features = dev->features;
3137 
3138 	switch (ethcmd) {
3139 	case ETHTOOL_GSET:
3140 		rc = ethtool_get_settings(dev, useraddr);
3141 		break;
3142 	case ETHTOOL_SSET:
3143 		rc = ethtool_set_settings(dev, useraddr);
3144 		break;
3145 	case ETHTOOL_GDRVINFO:
3146 		rc = ethtool_get_drvinfo(dev, devlink_state);
3147 		break;
3148 	case ETHTOOL_GREGS:
3149 		rc = ethtool_get_regs(dev, useraddr);
3150 		break;
3151 	case ETHTOOL_GWOL:
3152 		rc = ethtool_get_wol(dev, useraddr);
3153 		break;
3154 	case ETHTOOL_SWOL:
3155 		rc = ethtool_set_wol(dev, useraddr);
3156 		break;
3157 	case ETHTOOL_GMSGLVL:
3158 		rc = ethtool_get_value(dev, useraddr, ethcmd,
3159 				       dev->ethtool_ops->get_msglevel);
3160 		break;
3161 	case ETHTOOL_SMSGLVL:
3162 		rc = ethtool_set_value_void(dev, useraddr,
3163 				       dev->ethtool_ops->set_msglevel);
3164 		if (!rc)
3165 			ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
3166 		break;
3167 	case ETHTOOL_GEEE:
3168 		rc = ethtool_get_eee(dev, useraddr);
3169 		break;
3170 	case ETHTOOL_SEEE:
3171 		rc = ethtool_set_eee(dev, useraddr);
3172 		break;
3173 	case ETHTOOL_NWAY_RST:
3174 		rc = ethtool_nway_reset(dev);
3175 		break;
3176 	case ETHTOOL_GLINK:
3177 		rc = ethtool_get_link(dev, useraddr);
3178 		break;
3179 	case ETHTOOL_GEEPROM:
3180 		rc = ethtool_get_eeprom(dev, useraddr);
3181 		break;
3182 	case ETHTOOL_SEEPROM:
3183 		rc = ethtool_set_eeprom(dev, useraddr);
3184 		break;
3185 	case ETHTOOL_GCOALESCE:
3186 		rc = ethtool_get_coalesce(dev, useraddr);
3187 		break;
3188 	case ETHTOOL_SCOALESCE:
3189 		rc = ethtool_set_coalesce(dev, useraddr);
3190 		break;
3191 	case ETHTOOL_GRINGPARAM:
3192 		rc = ethtool_get_ringparam(dev, useraddr);
3193 		break;
3194 	case ETHTOOL_SRINGPARAM:
3195 		rc = ethtool_set_ringparam(dev, useraddr);
3196 		break;
3197 	case ETHTOOL_GPAUSEPARAM:
3198 		rc = ethtool_get_pauseparam(dev, useraddr);
3199 		break;
3200 	case ETHTOOL_SPAUSEPARAM:
3201 		rc = ethtool_set_pauseparam(dev, useraddr);
3202 		break;
3203 	case ETHTOOL_TEST:
3204 		rc = ethtool_self_test(dev, useraddr);
3205 		break;
3206 	case ETHTOOL_GSTRINGS:
3207 		rc = ethtool_get_strings(dev, useraddr);
3208 		break;
3209 	case ETHTOOL_PHYS_ID:
3210 		rc = ethtool_phys_id(dev, useraddr);
3211 		break;
3212 	case ETHTOOL_GSTATS:
3213 		rc = ethtool_get_stats(dev, useraddr);
3214 		break;
3215 	case ETHTOOL_GPERMADDR:
3216 		rc = ethtool_get_perm_addr(dev, useraddr);
3217 		break;
3218 	case ETHTOOL_GFLAGS:
3219 		rc = ethtool_get_value(dev, useraddr, ethcmd,
3220 					__ethtool_get_flags);
3221 		break;
3222 	case ETHTOOL_SFLAGS:
3223 		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3224 		break;
3225 	case ETHTOOL_GPFLAGS:
3226 		rc = ethtool_get_value(dev, useraddr, ethcmd,
3227 				       dev->ethtool_ops->get_priv_flags);
3228 		if (!rc)
3229 			ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
3230 		break;
3231 	case ETHTOOL_SPFLAGS:
3232 		rc = ethtool_set_value(dev, useraddr,
3233 				       dev->ethtool_ops->set_priv_flags);
3234 		break;
3235 	case ETHTOOL_GRXFH:
3236 	case ETHTOOL_GRXRINGS:
3237 	case ETHTOOL_GRXCLSRLCNT:
3238 	case ETHTOOL_GRXCLSRULE:
3239 	case ETHTOOL_GRXCLSRLALL:
3240 		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
3241 		break;
3242 	case ETHTOOL_SRXFH:
3243 	case ETHTOOL_SRXCLSRLDEL:
3244 	case ETHTOOL_SRXCLSRLINS:
3245 		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3246 		break;
3247 	case ETHTOOL_FLASHDEV:
3248 		rc = ethtool_flash_device(dev, devlink_state);
3249 		break;
3250 	case ETHTOOL_RESET:
3251 		rc = ethtool_reset(dev, useraddr);
3252 		break;
3253 	case ETHTOOL_GSSET_INFO:
3254 		rc = ethtool_get_sset_info(dev, useraddr);
3255 		break;
3256 	case ETHTOOL_GRXFHINDIR:
3257 		rc = ethtool_get_rxfh_indir(dev, useraddr);
3258 		break;
3259 	case ETHTOOL_SRXFHINDIR:
3260 		rc = ethtool_set_rxfh_indir(dev, useraddr);
3261 		break;
3262 	case ETHTOOL_GRSSH:
3263 		rc = ethtool_get_rxfh(dev, useraddr);
3264 		break;
3265 	case ETHTOOL_SRSSH:
3266 		rc = ethtool_set_rxfh(dev, useraddr);
3267 		break;
3268 	case ETHTOOL_GFEATURES:
3269 		rc = ethtool_get_features(dev, useraddr);
3270 		break;
3271 	case ETHTOOL_SFEATURES:
3272 		rc = ethtool_set_features(dev, useraddr);
3273 		break;
3274 	case ETHTOOL_GTXCSUM:
3275 	case ETHTOOL_GRXCSUM:
3276 	case ETHTOOL_GSG:
3277 	case ETHTOOL_GTSO:
3278 	case ETHTOOL_GGSO:
3279 	case ETHTOOL_GGRO:
3280 		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3281 		break;
3282 	case ETHTOOL_STXCSUM:
3283 	case ETHTOOL_SRXCSUM:
3284 	case ETHTOOL_SSG:
3285 	case ETHTOOL_STSO:
3286 	case ETHTOOL_SGSO:
3287 	case ETHTOOL_SGRO:
3288 		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3289 		break;
3290 	case ETHTOOL_GCHANNELS:
3291 		rc = ethtool_get_channels(dev, useraddr);
3292 		break;
3293 	case ETHTOOL_SCHANNELS:
3294 		rc = ethtool_set_channels(dev, useraddr);
3295 		break;
3296 	case ETHTOOL_SET_DUMP:
3297 		rc = ethtool_set_dump(dev, useraddr);
3298 		break;
3299 	case ETHTOOL_GET_DUMP_FLAG:
3300 		rc = ethtool_get_dump_flag(dev, useraddr);
3301 		break;
3302 	case ETHTOOL_GET_DUMP_DATA:
3303 		rc = ethtool_get_dump_data(dev, useraddr);
3304 		break;
3305 	case ETHTOOL_GET_TS_INFO:
3306 		rc = ethtool_get_ts_info(dev, useraddr);
3307 		break;
3308 	case ETHTOOL_GMODULEINFO:
3309 		rc = ethtool_get_module_info(dev, useraddr);
3310 		break;
3311 	case ETHTOOL_GMODULEEEPROM:
3312 		rc = ethtool_get_module_eeprom(dev, useraddr);
3313 		break;
3314 	case ETHTOOL_GTUNABLE:
3315 		rc = ethtool_get_tunable(dev, useraddr);
3316 		break;
3317 	case ETHTOOL_STUNABLE:
3318 		rc = ethtool_set_tunable(dev, useraddr);
3319 		break;
3320 	case ETHTOOL_GPHYSTATS:
3321 		rc = ethtool_get_phy_stats(dev, useraddr);
3322 		break;
3323 	case ETHTOOL_PERQUEUE:
3324 		rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3325 		break;
3326 	case ETHTOOL_GLINKSETTINGS:
3327 		rc = ethtool_get_link_ksettings(dev, useraddr);
3328 		break;
3329 	case ETHTOOL_SLINKSETTINGS:
3330 		rc = ethtool_set_link_ksettings(dev, useraddr);
3331 		break;
3332 	case ETHTOOL_PHY_GTUNABLE:
3333 		rc = get_phy_tunable(dev, useraddr);
3334 		break;
3335 	case ETHTOOL_PHY_STUNABLE:
3336 		rc = set_phy_tunable(dev, useraddr);
3337 		break;
3338 	case ETHTOOL_GFECPARAM:
3339 		rc = ethtool_get_fecparam(dev, useraddr);
3340 		break;
3341 	case ETHTOOL_SFECPARAM:
3342 		rc = ethtool_set_fecparam(dev, useraddr);
3343 		break;
3344 	default:
3345 		rc = -EOPNOTSUPP;
3346 	}
3347 
3348 	if (dev->ethtool_ops->complete)
3349 		dev->ethtool_ops->complete(dev);
3350 
3351 	if (old_features != dev->features)
3352 		netdev_features_change(dev);
3353 out:
3354 	if (dev->dev.parent)
3355 		pm_runtime_put(dev->dev.parent);
3356 
3357 	return rc;
3358 }
3359 
dev_ethtool(struct net * net,struct ifreq * ifr,void __user * useraddr)3360 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3361 {
3362 	struct ethtool_devlink_compat *state;
3363 	u32 ethcmd;
3364 	int rc;
3365 
3366 	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3367 		return -EFAULT;
3368 
3369 	state = kzalloc(sizeof(*state), GFP_KERNEL);
3370 	if (!state)
3371 		return -ENOMEM;
3372 
3373 	switch (ethcmd) {
3374 	case ETHTOOL_FLASHDEV:
3375 		if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3376 			rc = -EFAULT;
3377 			goto exit_free;
3378 		}
3379 		state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3380 		break;
3381 	}
3382 
3383 	rtnl_lock();
3384 	rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3385 	rtnl_unlock();
3386 	if (rc)
3387 		goto exit_free;
3388 
3389 	switch (ethcmd) {
3390 	case ETHTOOL_FLASHDEV:
3391 		if (state->devlink)
3392 			rc = devlink_compat_flash_update(state->devlink,
3393 							 state->efl.data);
3394 		break;
3395 	case ETHTOOL_GDRVINFO:
3396 		if (state->devlink)
3397 			devlink_compat_running_version(state->devlink,
3398 						       state->info.fw_version,
3399 						       sizeof(state->info.fw_version));
3400 		if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3401 			rc = -EFAULT;
3402 			goto exit_free;
3403 		}
3404 		break;
3405 	}
3406 
3407 exit_free:
3408 	if (state->devlink)
3409 		devlink_put(state->devlink);
3410 	kfree(state);
3411 	return rc;
3412 }
3413 
3414 struct ethtool_rx_flow_key {
3415 	struct flow_dissector_key_basic			basic;
3416 	union {
3417 		struct flow_dissector_key_ipv4_addrs	ipv4;
3418 		struct flow_dissector_key_ipv6_addrs	ipv6;
3419 	};
3420 	struct flow_dissector_key_ports			tp;
3421 	struct flow_dissector_key_ip			ip;
3422 	struct flow_dissector_key_vlan			vlan;
3423 	struct flow_dissector_key_eth_addrs		eth_addrs;
3424 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3425 
3426 struct ethtool_rx_flow_match {
3427 	struct flow_dissector		dissector;
3428 	struct ethtool_rx_flow_key	key;
3429 	struct ethtool_rx_flow_key	mask;
3430 };
3431 
3432 struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input * input)3433 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3434 {
3435 	const struct ethtool_rx_flow_spec *fs = input->fs;
3436 	struct ethtool_rx_flow_match *match;
3437 	struct ethtool_rx_flow_rule *flow;
3438 	struct flow_action_entry *act;
3439 
3440 	flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3441 		       sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3442 	if (!flow)
3443 		return ERR_PTR(-ENOMEM);
3444 
3445 	/* ethtool_rx supports only one single action per rule. */
3446 	flow->rule = flow_rule_alloc(1);
3447 	if (!flow->rule) {
3448 		kfree(flow);
3449 		return ERR_PTR(-ENOMEM);
3450 	}
3451 
3452 	match = (struct ethtool_rx_flow_match *)flow->priv;
3453 	flow->rule->match.dissector	= &match->dissector;
3454 	flow->rule->match.mask		= &match->mask;
3455 	flow->rule->match.key		= &match->key;
3456 
3457 	match->mask.basic.n_proto = htons(0xffff);
3458 
3459 	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3460 	case ETHER_FLOW: {
3461 		const struct ethhdr *ether_spec, *ether_m_spec;
3462 
3463 		ether_spec = &fs->h_u.ether_spec;
3464 		ether_m_spec = &fs->m_u.ether_spec;
3465 
3466 		if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3467 			ether_addr_copy(match->key.eth_addrs.src,
3468 					ether_spec->h_source);
3469 			ether_addr_copy(match->mask.eth_addrs.src,
3470 					ether_m_spec->h_source);
3471 		}
3472 		if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3473 			ether_addr_copy(match->key.eth_addrs.dst,
3474 					ether_spec->h_dest);
3475 			ether_addr_copy(match->mask.eth_addrs.dst,
3476 					ether_m_spec->h_dest);
3477 		}
3478 		if (ether_m_spec->h_proto) {
3479 			match->key.basic.n_proto = ether_spec->h_proto;
3480 			match->mask.basic.n_proto = ether_m_spec->h_proto;
3481 		}
3482 		}
3483 		break;
3484 	case TCP_V4_FLOW:
3485 	case UDP_V4_FLOW: {
3486 		const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3487 
3488 		match->key.basic.n_proto = htons(ETH_P_IP);
3489 
3490 		v4_spec = &fs->h_u.tcp_ip4_spec;
3491 		v4_m_spec = &fs->m_u.tcp_ip4_spec;
3492 
3493 		if (v4_m_spec->ip4src) {
3494 			match->key.ipv4.src = v4_spec->ip4src;
3495 			match->mask.ipv4.src = v4_m_spec->ip4src;
3496 		}
3497 		if (v4_m_spec->ip4dst) {
3498 			match->key.ipv4.dst = v4_spec->ip4dst;
3499 			match->mask.ipv4.dst = v4_m_spec->ip4dst;
3500 		}
3501 		if (v4_m_spec->ip4src ||
3502 		    v4_m_spec->ip4dst) {
3503 			match->dissector.used_keys |=
3504 				BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3505 			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3506 				offsetof(struct ethtool_rx_flow_key, ipv4);
3507 		}
3508 		if (v4_m_spec->psrc) {
3509 			match->key.tp.src = v4_spec->psrc;
3510 			match->mask.tp.src = v4_m_spec->psrc;
3511 		}
3512 		if (v4_m_spec->pdst) {
3513 			match->key.tp.dst = v4_spec->pdst;
3514 			match->mask.tp.dst = v4_m_spec->pdst;
3515 		}
3516 		if (v4_m_spec->psrc ||
3517 		    v4_m_spec->pdst) {
3518 			match->dissector.used_keys |=
3519 				BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3520 			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3521 				offsetof(struct ethtool_rx_flow_key, tp);
3522 		}
3523 		if (v4_m_spec->tos) {
3524 			match->key.ip.tos = v4_spec->tos;
3525 			match->mask.ip.tos = v4_m_spec->tos;
3526 			match->dissector.used_keys |=
3527 				BIT(FLOW_DISSECTOR_KEY_IP);
3528 			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3529 				offsetof(struct ethtool_rx_flow_key, ip);
3530 		}
3531 		}
3532 		break;
3533 	case TCP_V6_FLOW:
3534 	case UDP_V6_FLOW: {
3535 		const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3536 
3537 		match->key.basic.n_proto = htons(ETH_P_IPV6);
3538 
3539 		v6_spec = &fs->h_u.tcp_ip6_spec;
3540 		v6_m_spec = &fs->m_u.tcp_ip6_spec;
3541 		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3542 			memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3543 			       sizeof(match->key.ipv6.src));
3544 			memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3545 			       sizeof(match->mask.ipv6.src));
3546 		}
3547 		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3548 			memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3549 			       sizeof(match->key.ipv6.dst));
3550 			memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3551 			       sizeof(match->mask.ipv6.dst));
3552 		}
3553 		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3554 		    !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3555 			match->dissector.used_keys |=
3556 				BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3557 			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3558 				offsetof(struct ethtool_rx_flow_key, ipv6);
3559 		}
3560 		if (v6_m_spec->psrc) {
3561 			match->key.tp.src = v6_spec->psrc;
3562 			match->mask.tp.src = v6_m_spec->psrc;
3563 		}
3564 		if (v6_m_spec->pdst) {
3565 			match->key.tp.dst = v6_spec->pdst;
3566 			match->mask.tp.dst = v6_m_spec->pdst;
3567 		}
3568 		if (v6_m_spec->psrc ||
3569 		    v6_m_spec->pdst) {
3570 			match->dissector.used_keys |=
3571 				BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3572 			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3573 				offsetof(struct ethtool_rx_flow_key, tp);
3574 		}
3575 		if (v6_m_spec->tclass) {
3576 			match->key.ip.tos = v6_spec->tclass;
3577 			match->mask.ip.tos = v6_m_spec->tclass;
3578 			match->dissector.used_keys |=
3579 				BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3580 			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3581 				offsetof(struct ethtool_rx_flow_key, ip);
3582 		}
3583 		}
3584 		break;
3585 	default:
3586 		ethtool_rx_flow_rule_destroy(flow);
3587 		return ERR_PTR(-EINVAL);
3588 	}
3589 
3590 	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3591 	case TCP_V4_FLOW:
3592 	case TCP_V6_FLOW:
3593 		match->key.basic.ip_proto = IPPROTO_TCP;
3594 		match->mask.basic.ip_proto = 0xff;
3595 		break;
3596 	case UDP_V4_FLOW:
3597 	case UDP_V6_FLOW:
3598 		match->key.basic.ip_proto = IPPROTO_UDP;
3599 		match->mask.basic.ip_proto = 0xff;
3600 		break;
3601 	}
3602 
3603 	match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3604 	match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3605 		offsetof(struct ethtool_rx_flow_key, basic);
3606 
3607 	if (fs->flow_type & FLOW_EXT) {
3608 		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3609 		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3610 
3611 		if (ext_m_spec->vlan_etype) {
3612 			match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3613 			match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3614 		}
3615 
3616 		if (ext_m_spec->vlan_tci) {
3617 			match->key.vlan.vlan_id =
3618 				ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3619 			match->mask.vlan.vlan_id =
3620 				ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3621 
3622 			match->key.vlan.vlan_dei =
3623 				!!(ext_h_spec->vlan_tci & htons(0x1000));
3624 			match->mask.vlan.vlan_dei =
3625 				!!(ext_m_spec->vlan_tci & htons(0x1000));
3626 
3627 			match->key.vlan.vlan_priority =
3628 				(ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3629 			match->mask.vlan.vlan_priority =
3630 				(ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3631 		}
3632 
3633 		if (ext_m_spec->vlan_etype ||
3634 		    ext_m_spec->vlan_tci) {
3635 			match->dissector.used_keys |=
3636 				BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3637 			match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3638 				offsetof(struct ethtool_rx_flow_key, vlan);
3639 		}
3640 	}
3641 	if (fs->flow_type & FLOW_MAC_EXT) {
3642 		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3643 		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3644 
3645 		memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3646 		       ETH_ALEN);
3647 		memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3648 		       ETH_ALEN);
3649 
3650 		match->dissector.used_keys |=
3651 			BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3652 		match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3653 			offsetof(struct ethtool_rx_flow_key, eth_addrs);
3654 	}
3655 
3656 	act = &flow->rule->action.entries[0];
3657 	switch (fs->ring_cookie) {
3658 	case RX_CLS_FLOW_DISC:
3659 		act->id = FLOW_ACTION_DROP;
3660 		break;
3661 	case RX_CLS_FLOW_WAKE:
3662 		act->id = FLOW_ACTION_WAKE;
3663 		break;
3664 	default:
3665 		act->id = FLOW_ACTION_QUEUE;
3666 		if (fs->flow_type & FLOW_RSS)
3667 			act->queue.ctx = input->rss_ctx;
3668 
3669 		act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3670 		act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3671 		break;
3672 	}
3673 
3674 	return flow;
3675 }
3676 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3677 
ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule * flow)3678 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3679 {
3680 	kfree(flow->rule);
3681 	kfree(flow);
3682 }
3683 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3684