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Linux/net/core/ethtool.c

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  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/module.h>
 11 #include <linux/types.h>
 12 #include <linux/capability.h>
 13 #include <linux/errno.h>
 14 #include <linux/ethtool.h>
 15 #include <linux/netdevice.h>
 16 #include <linux/net_tstamp.h>
 17 #include <linux/phy.h>
 18 #include <linux/bitops.h>
 19 #include <linux/uaccess.h>
 20 #include <linux/vmalloc.h>
 21 #include <linux/sfp.h>
 22 #include <linux/slab.h>
 23 #include <linux/rtnetlink.h>
 24 #include <linux/sched/signal.h>
 25 #include <linux/net.h>
 26 #include <net/devlink.h>
 27 #include <net/xdp_sock.h>
 28 #include <net/flow_offload.h>
 29 
 30 /*
 31  * Some useful ethtool_ops methods that're device independent.
 32  * If we find that all drivers want to do the same thing here,
 33  * we can turn these into dev_() function calls.
 34  */
 35 
 36 u32 ethtool_op_get_link(struct net_device *dev)
 37 {
 38         return netif_carrier_ok(dev) ? 1 : 0;
 39 }
 40 EXPORT_SYMBOL(ethtool_op_get_link);
 41 
 42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
 43 {
 44         info->so_timestamping =
 45                 SOF_TIMESTAMPING_TX_SOFTWARE |
 46                 SOF_TIMESTAMPING_RX_SOFTWARE |
 47                 SOF_TIMESTAMPING_SOFTWARE;
 48         info->phc_index = -1;
 49         return 0;
 50 }
 51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
 52 
 53 /* Handlers for each ethtool command */
 54 
 55 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
 56 
 57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
 58         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
 59         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
 60         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
 61         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
 62         [NETIF_F_HIGHDMA_BIT] =          "highdma",
 63         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
 64         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
 65 
 66         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
 67         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
 68         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
 69         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
 70         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
 71         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
 72         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
 73         [NETIF_F_LLTX_BIT] =             "tx-lockless",
 74         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
 75         [NETIF_F_GRO_BIT] =              "rx-gro",
 76         [NETIF_F_GRO_HW_BIT] =           "rx-gro-hw",
 77         [NETIF_F_LRO_BIT] =              "rx-lro",
 78 
 79         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
 80         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
 81         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
 82         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
 83         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
 84         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
 85         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
 86         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
 87         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
 88         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
 89         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
 90         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
 91         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
 92         [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
 93         [NETIF_F_GSO_ESP_BIT] =          "tx-esp-segmentation",
 94         [NETIF_F_GSO_UDP_L4_BIT] =       "tx-udp-segmentation",
 95 
 96         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
 97         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
 98         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
 99         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
100         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
101         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
102         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
103         [NETIF_F_LOOPBACK_BIT] =         "loopback",
104         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
105         [NETIF_F_RXALL_BIT] =            "rx-all",
106         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
107         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
108         [NETIF_F_HW_ESP_BIT] =           "esp-hw-offload",
109         [NETIF_F_HW_ESP_TX_CSUM_BIT] =   "esp-tx-csum-hw-offload",
110         [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] =       "rx-udp_tunnel-port-offload",
111         [NETIF_F_HW_TLS_RECORD_BIT] =   "tls-hw-record",
112         [NETIF_F_HW_TLS_TX_BIT] =        "tls-hw-tx-offload",
113         [NETIF_F_HW_TLS_RX_BIT] =        "tls-hw-rx-offload",
114 };
115 
116 static const char
117 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
118         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
119         [ETH_RSS_HASH_XOR_BIT] =        "xor",
120         [ETH_RSS_HASH_CRC32_BIT] =      "crc32",
121 };
122 
123 static const char
124 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
125         [ETHTOOL_ID_UNSPEC]     = "Unspec",
126         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
127         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
128         [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
129 };
130 
131 static const char
132 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
133         [ETHTOOL_ID_UNSPEC]     = "Unspec",
134         [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
135         [ETHTOOL_PHY_FAST_LINK_DOWN] = "phy-fast-link-down",
136 };
137 
138 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
139 {
140         struct ethtool_gfeatures cmd = {
141                 .cmd = ETHTOOL_GFEATURES,
142                 .size = ETHTOOL_DEV_FEATURE_WORDS,
143         };
144         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
145         u32 __user *sizeaddr;
146         u32 copy_size;
147         int i;
148 
149         /* in case feature bits run out again */
150         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
151 
152         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
153                 features[i].available = (u32)(dev->hw_features >> (32 * i));
154                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
155                 features[i].active = (u32)(dev->features >> (32 * i));
156                 features[i].never_changed =
157                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
158         }
159 
160         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
161         if (get_user(copy_size, sizeaddr))
162                 return -EFAULT;
163 
164         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
165                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
166 
167         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
168                 return -EFAULT;
169         useraddr += sizeof(cmd);
170         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
171                 return -EFAULT;
172 
173         return 0;
174 }
175 
176 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
177 {
178         struct ethtool_sfeatures cmd;
179         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
180         netdev_features_t wanted = 0, valid = 0;
181         int i, ret = 0;
182 
183         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
184                 return -EFAULT;
185         useraddr += sizeof(cmd);
186 
187         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
188                 return -EINVAL;
189 
190         if (copy_from_user(features, useraddr, sizeof(features)))
191                 return -EFAULT;
192 
193         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
194                 valid |= (netdev_features_t)features[i].valid << (32 * i);
195                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
196         }
197 
198         if (valid & ~NETIF_F_ETHTOOL_BITS)
199                 return -EINVAL;
200 
201         if (valid & ~dev->hw_features) {
202                 valid &= dev->hw_features;
203                 ret |= ETHTOOL_F_UNSUPPORTED;
204         }
205 
206         dev->wanted_features &= ~valid;
207         dev->wanted_features |= wanted & valid;
208         __netdev_update_features(dev);
209 
210         if ((dev->wanted_features ^ dev->features) & valid)
211                 ret |= ETHTOOL_F_WISH;
212 
213         return ret;
214 }
215 
216 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
217 {
218         const struct ethtool_ops *ops = dev->ethtool_ops;
219 
220         if (sset == ETH_SS_FEATURES)
221                 return ARRAY_SIZE(netdev_features_strings);
222 
223         if (sset == ETH_SS_RSS_HASH_FUNCS)
224                 return ARRAY_SIZE(rss_hash_func_strings);
225 
226         if (sset == ETH_SS_TUNABLES)
227                 return ARRAY_SIZE(tunable_strings);
228 
229         if (sset == ETH_SS_PHY_TUNABLES)
230                 return ARRAY_SIZE(phy_tunable_strings);
231 
232         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
233             !ops->get_ethtool_phy_stats)
234                 return phy_ethtool_get_sset_count(dev->phydev);
235 
236         if (ops->get_sset_count && ops->get_strings)
237                 return ops->get_sset_count(dev, sset);
238         else
239                 return -EOPNOTSUPP;
240 }
241 
242 static void __ethtool_get_strings(struct net_device *dev,
243         u32 stringset, u8 *data)
244 {
245         const struct ethtool_ops *ops = dev->ethtool_ops;
246 
247         if (stringset == ETH_SS_FEATURES)
248                 memcpy(data, netdev_features_strings,
249                         sizeof(netdev_features_strings));
250         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
251                 memcpy(data, rss_hash_func_strings,
252                        sizeof(rss_hash_func_strings));
253         else if (stringset == ETH_SS_TUNABLES)
254                 memcpy(data, tunable_strings, sizeof(tunable_strings));
255         else if (stringset == ETH_SS_PHY_TUNABLES)
256                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
257         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
258                  !ops->get_ethtool_phy_stats)
259                 phy_ethtool_get_strings(dev->phydev, data);
260         else
261                 /* ops->get_strings is valid because checked earlier */
262                 ops->get_strings(dev, stringset, data);
263 }
264 
265 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
266 {
267         /* feature masks of legacy discrete ethtool ops */
268 
269         switch (eth_cmd) {
270         case ETHTOOL_GTXCSUM:
271         case ETHTOOL_STXCSUM:
272                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
273         case ETHTOOL_GRXCSUM:
274         case ETHTOOL_SRXCSUM:
275                 return NETIF_F_RXCSUM;
276         case ETHTOOL_GSG:
277         case ETHTOOL_SSG:
278                 return NETIF_F_SG;
279         case ETHTOOL_GTSO:
280         case ETHTOOL_STSO:
281                 return NETIF_F_ALL_TSO;
282         case ETHTOOL_GGSO:
283         case ETHTOOL_SGSO:
284                 return NETIF_F_GSO;
285         case ETHTOOL_GGRO:
286         case ETHTOOL_SGRO:
287                 return NETIF_F_GRO;
288         default:
289                 BUG();
290         }
291 }
292 
293 static int ethtool_get_one_feature(struct net_device *dev,
294         char __user *useraddr, u32 ethcmd)
295 {
296         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
297         struct ethtool_value edata = {
298                 .cmd = ethcmd,
299                 .data = !!(dev->features & mask),
300         };
301 
302         if (copy_to_user(useraddr, &edata, sizeof(edata)))
303                 return -EFAULT;
304         return 0;
305 }
306 
307 static int ethtool_set_one_feature(struct net_device *dev,
308         void __user *useraddr, u32 ethcmd)
309 {
310         struct ethtool_value edata;
311         netdev_features_t mask;
312 
313         if (copy_from_user(&edata, useraddr, sizeof(edata)))
314                 return -EFAULT;
315 
316         mask = ethtool_get_feature_mask(ethcmd);
317         mask &= dev->hw_features;
318         if (!mask)
319                 return -EOPNOTSUPP;
320 
321         if (edata.data)
322                 dev->wanted_features |= mask;
323         else
324                 dev->wanted_features &= ~mask;
325 
326         __netdev_update_features(dev);
327 
328         return 0;
329 }
330 
331 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
332                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
333 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
334                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
335                           NETIF_F_RXHASH)
336 
337 static u32 __ethtool_get_flags(struct net_device *dev)
338 {
339         u32 flags = 0;
340 
341         if (dev->features & NETIF_F_LRO)
342                 flags |= ETH_FLAG_LRO;
343         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
344                 flags |= ETH_FLAG_RXVLAN;
345         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
346                 flags |= ETH_FLAG_TXVLAN;
347         if (dev->features & NETIF_F_NTUPLE)
348                 flags |= ETH_FLAG_NTUPLE;
349         if (dev->features & NETIF_F_RXHASH)
350                 flags |= ETH_FLAG_RXHASH;
351 
352         return flags;
353 }
354 
355 static int __ethtool_set_flags(struct net_device *dev, u32 data)
356 {
357         netdev_features_t features = 0, changed;
358 
359         if (data & ~ETH_ALL_FLAGS)
360                 return -EINVAL;
361 
362         if (data & ETH_FLAG_LRO)
363                 features |= NETIF_F_LRO;
364         if (data & ETH_FLAG_RXVLAN)
365                 features |= NETIF_F_HW_VLAN_CTAG_RX;
366         if (data & ETH_FLAG_TXVLAN)
367                 features |= NETIF_F_HW_VLAN_CTAG_TX;
368         if (data & ETH_FLAG_NTUPLE)
369                 features |= NETIF_F_NTUPLE;
370         if (data & ETH_FLAG_RXHASH)
371                 features |= NETIF_F_RXHASH;
372 
373         /* allow changing only bits set in hw_features */
374         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
375         if (changed & ~dev->hw_features)
376                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
377 
378         dev->wanted_features =
379                 (dev->wanted_features & ~changed) | (features & changed);
380 
381         __netdev_update_features(dev);
382 
383         return 0;
384 }
385 
386 /* Given two link masks, AND them together and save the result in dst. */
387 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
388                                   struct ethtool_link_ksettings *src)
389 {
390         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
391         unsigned int idx = 0;
392 
393         for (; idx < size; idx++) {
394                 dst->link_modes.supported[idx] &=
395                         src->link_modes.supported[idx];
396                 dst->link_modes.advertising[idx] &=
397                         src->link_modes.advertising[idx];
398         }
399 }
400 EXPORT_SYMBOL(ethtool_intersect_link_masks);
401 
402 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
403                                              u32 legacy_u32)
404 {
405         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
406         dst[0] = legacy_u32;
407 }
408 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
409 
410 /* return false if src had higher bits set. lower bits always updated. */
411 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
412                                              const unsigned long *src)
413 {
414         bool retval = true;
415 
416         /* TODO: following test will soon always be true */
417         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
418                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
419 
420                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
421                 bitmap_fill(ext, 32);
422                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
423                 if (bitmap_intersects(ext, src,
424                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
425                         /* src mask goes beyond bit 31 */
426                         retval = false;
427                 }
428         }
429         *legacy_u32 = src[0];
430         return retval;
431 }
432 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
433 
434 /* return false if legacy contained non-0 deprecated fields
435  * maxtxpkt/maxrxpkt. rest of ksettings always updated
436  */
437 static bool
438 convert_legacy_settings_to_link_ksettings(
439         struct ethtool_link_ksettings *link_ksettings,
440         const struct ethtool_cmd *legacy_settings)
441 {
442         bool retval = true;
443 
444         memset(link_ksettings, 0, sizeof(*link_ksettings));
445 
446         /* This is used to tell users that driver is still using these
447          * deprecated legacy fields, and they should not use
448          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
449          */
450         if (legacy_settings->maxtxpkt ||
451             legacy_settings->maxrxpkt)
452                 retval = false;
453 
454         ethtool_convert_legacy_u32_to_link_mode(
455                 link_ksettings->link_modes.supported,
456                 legacy_settings->supported);
457         ethtool_convert_legacy_u32_to_link_mode(
458                 link_ksettings->link_modes.advertising,
459                 legacy_settings->advertising);
460         ethtool_convert_legacy_u32_to_link_mode(
461                 link_ksettings->link_modes.lp_advertising,
462                 legacy_settings->lp_advertising);
463         link_ksettings->base.speed
464                 = ethtool_cmd_speed(legacy_settings);
465         link_ksettings->base.duplex
466                 = legacy_settings->duplex;
467         link_ksettings->base.port
468                 = legacy_settings->port;
469         link_ksettings->base.phy_address
470                 = legacy_settings->phy_address;
471         link_ksettings->base.autoneg
472                 = legacy_settings->autoneg;
473         link_ksettings->base.mdio_support
474                 = legacy_settings->mdio_support;
475         link_ksettings->base.eth_tp_mdix
476                 = legacy_settings->eth_tp_mdix;
477         link_ksettings->base.eth_tp_mdix_ctrl
478                 = legacy_settings->eth_tp_mdix_ctrl;
479         return retval;
480 }
481 
482 /* return false if ksettings link modes had higher bits
483  * set. legacy_settings always updated (best effort)
484  */
485 static bool
486 convert_link_ksettings_to_legacy_settings(
487         struct ethtool_cmd *legacy_settings,
488         const struct ethtool_link_ksettings *link_ksettings)
489 {
490         bool retval = true;
491 
492         memset(legacy_settings, 0, sizeof(*legacy_settings));
493         /* this also clears the deprecated fields in legacy structure:
494          * __u8         transceiver;
495          * __u32        maxtxpkt;
496          * __u32        maxrxpkt;
497          */
498 
499         retval &= ethtool_convert_link_mode_to_legacy_u32(
500                 &legacy_settings->supported,
501                 link_ksettings->link_modes.supported);
502         retval &= ethtool_convert_link_mode_to_legacy_u32(
503                 &legacy_settings->advertising,
504                 link_ksettings->link_modes.advertising);
505         retval &= ethtool_convert_link_mode_to_legacy_u32(
506                 &legacy_settings->lp_advertising,
507                 link_ksettings->link_modes.lp_advertising);
508         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
509         legacy_settings->duplex
510                 = link_ksettings->base.duplex;
511         legacy_settings->port
512                 = link_ksettings->base.port;
513         legacy_settings->phy_address
514                 = link_ksettings->base.phy_address;
515         legacy_settings->autoneg
516                 = link_ksettings->base.autoneg;
517         legacy_settings->mdio_support
518                 = link_ksettings->base.mdio_support;
519         legacy_settings->eth_tp_mdix
520                 = link_ksettings->base.eth_tp_mdix;
521         legacy_settings->eth_tp_mdix_ctrl
522                 = link_ksettings->base.eth_tp_mdix_ctrl;
523         legacy_settings->transceiver
524                 = link_ksettings->base.transceiver;
525         return retval;
526 }
527 
528 /* number of 32-bit words to store the user's link mode bitmaps */
529 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
530         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
531 
532 /* layout of the struct passed from/to userland */
533 struct ethtool_link_usettings {
534         struct ethtool_link_settings base;
535         struct {
536                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
537                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
538                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
539         } link_modes;
540 };
541 
542 /* Internal kernel helper to query a device ethtool_link_settings. */
543 int __ethtool_get_link_ksettings(struct net_device *dev,
544                                  struct ethtool_link_ksettings *link_ksettings)
545 {
546         ASSERT_RTNL();
547 
548         if (!dev->ethtool_ops->get_link_ksettings)
549                 return -EOPNOTSUPP;
550 
551         memset(link_ksettings, 0, sizeof(*link_ksettings));
552         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
553 }
554 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
555 
556 /* convert ethtool_link_usettings in user space to a kernel internal
557  * ethtool_link_ksettings. return 0 on success, errno on error.
558  */
559 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
560                                          const void __user *from)
561 {
562         struct ethtool_link_usettings link_usettings;
563 
564         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
565                 return -EFAULT;
566 
567         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
568         bitmap_from_arr32(to->link_modes.supported,
569                           link_usettings.link_modes.supported,
570                           __ETHTOOL_LINK_MODE_MASK_NBITS);
571         bitmap_from_arr32(to->link_modes.advertising,
572                           link_usettings.link_modes.advertising,
573                           __ETHTOOL_LINK_MODE_MASK_NBITS);
574         bitmap_from_arr32(to->link_modes.lp_advertising,
575                           link_usettings.link_modes.lp_advertising,
576                           __ETHTOOL_LINK_MODE_MASK_NBITS);
577 
578         return 0;
579 }
580 
581 /* convert a kernel internal ethtool_link_ksettings to
582  * ethtool_link_usettings in user space. return 0 on success, errno on
583  * error.
584  */
585 static int
586 store_link_ksettings_for_user(void __user *to,
587                               const struct ethtool_link_ksettings *from)
588 {
589         struct ethtool_link_usettings link_usettings;
590 
591         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
592         bitmap_to_arr32(link_usettings.link_modes.supported,
593                         from->link_modes.supported,
594                         __ETHTOOL_LINK_MODE_MASK_NBITS);
595         bitmap_to_arr32(link_usettings.link_modes.advertising,
596                         from->link_modes.advertising,
597                         __ETHTOOL_LINK_MODE_MASK_NBITS);
598         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
599                         from->link_modes.lp_advertising,
600                         __ETHTOOL_LINK_MODE_MASK_NBITS);
601 
602         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
603                 return -EFAULT;
604 
605         return 0;
606 }
607 
608 /* Query device for its ethtool_link_settings. */
609 static int ethtool_get_link_ksettings(struct net_device *dev,
610                                       void __user *useraddr)
611 {
612         int err = 0;
613         struct ethtool_link_ksettings link_ksettings;
614 
615         ASSERT_RTNL();
616         if (!dev->ethtool_ops->get_link_ksettings)
617                 return -EOPNOTSUPP;
618 
619         /* handle bitmap nbits handshake */
620         if (copy_from_user(&link_ksettings.base, useraddr,
621                            sizeof(link_ksettings.base)))
622                 return -EFAULT;
623 
624         if (__ETHTOOL_LINK_MODE_MASK_NU32
625             != link_ksettings.base.link_mode_masks_nwords) {
626                 /* wrong link mode nbits requested */
627                 memset(&link_ksettings, 0, sizeof(link_ksettings));
628                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
629                 /* send back number of words required as negative val */
630                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
631                                    "need too many bits for link modes!");
632                 link_ksettings.base.link_mode_masks_nwords
633                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
634 
635                 /* copy the base fields back to user, not the link
636                  * mode bitmaps
637                  */
638                 if (copy_to_user(useraddr, &link_ksettings.base,
639                                  sizeof(link_ksettings.base)))
640                         return -EFAULT;
641 
642                 return 0;
643         }
644 
645         /* handshake successful: user/kernel agree on
646          * link_mode_masks_nwords
647          */
648 
649         memset(&link_ksettings, 0, sizeof(link_ksettings));
650         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
651         if (err < 0)
652                 return err;
653 
654         /* make sure we tell the right values to user */
655         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
656         link_ksettings.base.link_mode_masks_nwords
657                 = __ETHTOOL_LINK_MODE_MASK_NU32;
658 
659         return store_link_ksettings_for_user(useraddr, &link_ksettings);
660 }
661 
662 /* Update device ethtool_link_settings. */
663 static int ethtool_set_link_ksettings(struct net_device *dev,
664                                       void __user *useraddr)
665 {
666         int err;
667         struct ethtool_link_ksettings link_ksettings;
668 
669         ASSERT_RTNL();
670 
671         if (!dev->ethtool_ops->set_link_ksettings)
672                 return -EOPNOTSUPP;
673 
674         /* make sure nbits field has expected value */
675         if (copy_from_user(&link_ksettings.base, useraddr,
676                            sizeof(link_ksettings.base)))
677                 return -EFAULT;
678 
679         if (__ETHTOOL_LINK_MODE_MASK_NU32
680             != link_ksettings.base.link_mode_masks_nwords)
681                 return -EINVAL;
682 
683         /* copy the whole structure, now that we know it has expected
684          * format
685          */
686         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
687         if (err)
688                 return err;
689 
690         /* re-check nwords field, just in case */
691         if (__ETHTOOL_LINK_MODE_MASK_NU32
692             != link_ksettings.base.link_mode_masks_nwords)
693                 return -EINVAL;
694 
695         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
696 }
697 
698 /* Query device for its ethtool_cmd settings.
699  *
700  * Backward compatibility note: for compatibility with legacy ethtool, this is
701  * now implemented via get_link_ksettings. When driver reports higher link mode
702  * bits, a kernel warning is logged once (with name of 1st driver/device) to
703  * recommend user to upgrade ethtool, but the command is successful (only the
704  * lower link mode bits reported back to user). Deprecated fields from
705  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
706  */
707 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
708 {
709         struct ethtool_link_ksettings link_ksettings;
710         struct ethtool_cmd cmd;
711         int err;
712 
713         ASSERT_RTNL();
714         if (!dev->ethtool_ops->get_link_ksettings)
715                 return -EOPNOTSUPP;
716 
717         memset(&link_ksettings, 0, sizeof(link_ksettings));
718         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
719         if (err < 0)
720                 return err;
721         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
722 
723         /* send a sensible cmd tag back to user */
724         cmd.cmd = ETHTOOL_GSET;
725 
726         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
727                 return -EFAULT;
728 
729         return 0;
730 }
731 
732 /* Update device link settings with given ethtool_cmd.
733  *
734  * Backward compatibility note: for compatibility with legacy ethtool, this is
735  * now always implemented via set_link_settings. When user's request updates
736  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
737  * warning is logged once (with name of 1st driver/device) to recommend user to
738  * upgrade ethtool, and the request is rejected.
739  */
740 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
741 {
742         struct ethtool_link_ksettings link_ksettings;
743         struct ethtool_cmd cmd;
744 
745         ASSERT_RTNL();
746 
747         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
748                 return -EFAULT;
749         if (!dev->ethtool_ops->set_link_ksettings)
750                 return -EOPNOTSUPP;
751 
752         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
753                 return -EINVAL;
754         link_ksettings.base.link_mode_masks_nwords =
755                 __ETHTOOL_LINK_MODE_MASK_NU32;
756         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
757 }
758 
759 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
760                                                   void __user *useraddr)
761 {
762         struct ethtool_drvinfo info;
763         const struct ethtool_ops *ops = dev->ethtool_ops;
764 
765         memset(&info, 0, sizeof(info));
766         info.cmd = ETHTOOL_GDRVINFO;
767         if (ops->get_drvinfo) {
768                 ops->get_drvinfo(dev, &info);
769         } else if (dev->dev.parent && dev->dev.parent->driver) {
770                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
771                         sizeof(info.bus_info));
772                 strlcpy(info.driver, dev->dev.parent->driver->name,
773                         sizeof(info.driver));
774         } else {
775                 return -EOPNOTSUPP;
776         }
777 
778         /*
779          * this method of obtaining string set info is deprecated;
780          * Use ETHTOOL_GSSET_INFO instead.
781          */
782         if (ops->get_sset_count) {
783                 int rc;
784 
785                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
786                 if (rc >= 0)
787                         info.testinfo_len = rc;
788                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
789                 if (rc >= 0)
790                         info.n_stats = rc;
791                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
792                 if (rc >= 0)
793                         info.n_priv_flags = rc;
794         }
795         if (ops->get_regs_len) {
796                 int ret = ops->get_regs_len(dev);
797 
798                 if (ret > 0)
799                         info.regdump_len = ret;
800         }
801 
802         if (ops->get_eeprom_len)
803                 info.eedump_len = ops->get_eeprom_len(dev);
804 
805         if (!info.fw_version[0])
806                 devlink_compat_running_version(dev, info.fw_version,
807                                                sizeof(info.fw_version));
808 
809         if (copy_to_user(useraddr, &info, sizeof(info)))
810                 return -EFAULT;
811         return 0;
812 }
813 
814 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
815                                                     void __user *useraddr)
816 {
817         struct ethtool_sset_info info;
818         u64 sset_mask;
819         int i, idx = 0, n_bits = 0, ret, rc;
820         u32 *info_buf = NULL;
821 
822         if (copy_from_user(&info, useraddr, sizeof(info)))
823                 return -EFAULT;
824 
825         /* store copy of mask, because we zero struct later on */
826         sset_mask = info.sset_mask;
827         if (!sset_mask)
828                 return 0;
829 
830         /* calculate size of return buffer */
831         n_bits = hweight64(sset_mask);
832 
833         memset(&info, 0, sizeof(info));
834         info.cmd = ETHTOOL_GSSET_INFO;
835 
836         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
837         if (!info_buf)
838                 return -ENOMEM;
839 
840         /*
841          * fill return buffer based on input bitmask and successful
842          * get_sset_count return
843          */
844         for (i = 0; i < 64; i++) {
845                 if (!(sset_mask & (1ULL << i)))
846                         continue;
847 
848                 rc = __ethtool_get_sset_count(dev, i);
849                 if (rc >= 0) {
850                         info.sset_mask |= (1ULL << i);
851                         info_buf[idx++] = rc;
852                 }
853         }
854 
855         ret = -EFAULT;
856         if (copy_to_user(useraddr, &info, sizeof(info)))
857                 goto out;
858 
859         useraddr += offsetof(struct ethtool_sset_info, data);
860         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
861                 goto out;
862 
863         ret = 0;
864 
865 out:
866         kfree(info_buf);
867         return ret;
868 }
869 
870 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
871                                                 u32 cmd, void __user *useraddr)
872 {
873         struct ethtool_rxnfc info;
874         size_t info_size = sizeof(info);
875         int rc;
876 
877         if (!dev->ethtool_ops->set_rxnfc)
878                 return -EOPNOTSUPP;
879 
880         /* struct ethtool_rxnfc was originally defined for
881          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
882          * members.  User-space might still be using that
883          * definition. */
884         if (cmd == ETHTOOL_SRXFH)
885                 info_size = (offsetof(struct ethtool_rxnfc, data) +
886                              sizeof(info.data));
887 
888         if (copy_from_user(&info, useraddr, info_size))
889                 return -EFAULT;
890 
891         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
892         if (rc)
893                 return rc;
894 
895         if (cmd == ETHTOOL_SRXCLSRLINS &&
896             copy_to_user(useraddr, &info, info_size))
897                 return -EFAULT;
898 
899         return 0;
900 }
901 
902 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
903                                                 u32 cmd, void __user *useraddr)
904 {
905         struct ethtool_rxnfc info;
906         size_t info_size = sizeof(info);
907         const struct ethtool_ops *ops = dev->ethtool_ops;
908         int ret;
909         void *rule_buf = NULL;
910 
911         if (!ops->get_rxnfc)
912                 return -EOPNOTSUPP;
913 
914         /* struct ethtool_rxnfc was originally defined for
915          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
916          * members.  User-space might still be using that
917          * definition. */
918         if (cmd == ETHTOOL_GRXFH)
919                 info_size = (offsetof(struct ethtool_rxnfc, data) +
920                              sizeof(info.data));
921 
922         if (copy_from_user(&info, useraddr, info_size))
923                 return -EFAULT;
924 
925         /* If FLOW_RSS was requested then user-space must be using the
926          * new definition, as FLOW_RSS is newer.
927          */
928         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
929                 info_size = sizeof(info);
930                 if (copy_from_user(&info, useraddr, info_size))
931                         return -EFAULT;
932                 /* Since malicious users may modify the original data,
933                  * we need to check whether FLOW_RSS is still requested.
934                  */
935                 if (!(info.flow_type & FLOW_RSS))
936                         return -EINVAL;
937         }
938 
939         if (info.cmd != cmd)
940                 return -EINVAL;
941 
942         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
943                 if (info.rule_cnt > 0) {
944                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
945                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
946                                                    GFP_USER);
947                         if (!rule_buf)
948                                 return -ENOMEM;
949                 }
950         }
951 
952         ret = ops->get_rxnfc(dev, &info, rule_buf);
953         if (ret < 0)
954                 goto err_out;
955 
956         ret = -EFAULT;
957         if (copy_to_user(useraddr, &info, info_size))
958                 goto err_out;
959 
960         if (rule_buf) {
961                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
962                 if (copy_to_user(useraddr, rule_buf,
963                                  info.rule_cnt * sizeof(u32)))
964                         goto err_out;
965         }
966         ret = 0;
967 
968 err_out:
969         kfree(rule_buf);
970 
971         return ret;
972 }
973 
974 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
975                                         struct ethtool_rxnfc *rx_rings,
976                                         u32 size)
977 {
978         int i;
979 
980         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
981                 return -EFAULT;
982 
983         /* Validate ring indices */
984         for (i = 0; i < size; i++)
985                 if (indir[i] >= rx_rings->data)
986                         return -EINVAL;
987 
988         return 0;
989 }
990 
991 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
992 
993 void netdev_rss_key_fill(void *buffer, size_t len)
994 {
995         BUG_ON(len > sizeof(netdev_rss_key));
996         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
997         memcpy(buffer, netdev_rss_key, len);
998 }
999 EXPORT_SYMBOL(netdev_rss_key_fill);
1000 
1001 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1002 {
1003         u32 dev_size, current_max = 0;
1004         u32 *indir;
1005         int ret;
1006 
1007         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1008             !dev->ethtool_ops->get_rxfh)
1009                 return -EOPNOTSUPP;
1010         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1011         if (dev_size == 0)
1012                 return -EOPNOTSUPP;
1013 
1014         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1015         if (!indir)
1016                 return -ENOMEM;
1017 
1018         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1019         if (ret)
1020                 goto out;
1021 
1022         while (dev_size--)
1023                 current_max = max(current_max, indir[dev_size]);
1024 
1025         *max = current_max;
1026 
1027 out:
1028         kfree(indir);
1029         return ret;
1030 }
1031 
1032 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1033                                                      void __user *useraddr)
1034 {
1035         u32 user_size, dev_size;
1036         u32 *indir;
1037         int ret;
1038 
1039         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1040             !dev->ethtool_ops->get_rxfh)
1041                 return -EOPNOTSUPP;
1042         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1043         if (dev_size == 0)
1044                 return -EOPNOTSUPP;
1045 
1046         if (copy_from_user(&user_size,
1047                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1048                            sizeof(user_size)))
1049                 return -EFAULT;
1050 
1051         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1052                          &dev_size, sizeof(dev_size)))
1053                 return -EFAULT;
1054 
1055         /* If the user buffer size is 0, this is just a query for the
1056          * device table size.  Otherwise, if it's smaller than the
1057          * device table size it's an error.
1058          */
1059         if (user_size < dev_size)
1060                 return user_size == 0 ? 0 : -EINVAL;
1061 
1062         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1063         if (!indir)
1064                 return -ENOMEM;
1065 
1066         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1067         if (ret)
1068                 goto out;
1069 
1070         if (copy_to_user(useraddr +
1071                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1072                          indir, dev_size * sizeof(indir[0])))
1073                 ret = -EFAULT;
1074 
1075 out:
1076         kfree(indir);
1077         return ret;
1078 }
1079 
1080 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1081                                                      void __user *useraddr)
1082 {
1083         struct ethtool_rxnfc rx_rings;
1084         u32 user_size, dev_size, i;
1085         u32 *indir;
1086         const struct ethtool_ops *ops = dev->ethtool_ops;
1087         int ret;
1088         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1089 
1090         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1091             !ops->get_rxnfc)
1092                 return -EOPNOTSUPP;
1093 
1094         dev_size = ops->get_rxfh_indir_size(dev);
1095         if (dev_size == 0)
1096                 return -EOPNOTSUPP;
1097 
1098         if (copy_from_user(&user_size,
1099                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1100                            sizeof(user_size)))
1101                 return -EFAULT;
1102 
1103         if (user_size != 0 && user_size != dev_size)
1104                 return -EINVAL;
1105 
1106         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1107         if (!indir)
1108                 return -ENOMEM;
1109 
1110         rx_rings.cmd = ETHTOOL_GRXRINGS;
1111         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1112         if (ret)
1113                 goto out;
1114 
1115         if (user_size == 0) {
1116                 for (i = 0; i < dev_size; i++)
1117                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1118         } else {
1119                 ret = ethtool_copy_validate_indir(indir,
1120                                                   useraddr + ringidx_offset,
1121                                                   &rx_rings,
1122                                                   dev_size);
1123                 if (ret)
1124                         goto out;
1125         }
1126 
1127         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1128         if (ret)
1129                 goto out;
1130 
1131         /* indicate whether rxfh was set to default */
1132         if (user_size == 0)
1133                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1134         else
1135                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1136 
1137 out:
1138         kfree(indir);
1139         return ret;
1140 }
1141 
1142 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1143                                                void __user *useraddr)
1144 {
1145         int ret;
1146         const struct ethtool_ops *ops = dev->ethtool_ops;
1147         u32 user_indir_size, user_key_size;
1148         u32 dev_indir_size = 0, dev_key_size = 0;
1149         struct ethtool_rxfh rxfh;
1150         u32 total_size;
1151         u32 indir_bytes;
1152         u32 *indir = NULL;
1153         u8 dev_hfunc = 0;
1154         u8 *hkey = NULL;
1155         u8 *rss_config;
1156 
1157         if (!ops->get_rxfh)
1158                 return -EOPNOTSUPP;
1159 
1160         if (ops->get_rxfh_indir_size)
1161                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1162         if (ops->get_rxfh_key_size)
1163                 dev_key_size = ops->get_rxfh_key_size(dev);
1164 
1165         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1166                 return -EFAULT;
1167         user_indir_size = rxfh.indir_size;
1168         user_key_size = rxfh.key_size;
1169 
1170         /* Check that reserved fields are 0 for now */
1171         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1172                 return -EINVAL;
1173         /* Most drivers don't handle rss_context, check it's 0 as well */
1174         if (rxfh.rss_context && !ops->get_rxfh_context)
1175                 return -EOPNOTSUPP;
1176 
1177         rxfh.indir_size = dev_indir_size;
1178         rxfh.key_size = dev_key_size;
1179         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1180                 return -EFAULT;
1181 
1182         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1183             (user_key_size && (user_key_size != dev_key_size)))
1184                 return -EINVAL;
1185 
1186         indir_bytes = user_indir_size * sizeof(indir[0]);
1187         total_size = indir_bytes + user_key_size;
1188         rss_config = kzalloc(total_size, GFP_USER);
1189         if (!rss_config)
1190                 return -ENOMEM;
1191 
1192         if (user_indir_size)
1193                 indir = (u32 *)rss_config;
1194 
1195         if (user_key_size)
1196                 hkey = rss_config + indir_bytes;
1197 
1198         if (rxfh.rss_context)
1199                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1200                                                          &dev_hfunc,
1201                                                          rxfh.rss_context);
1202         else
1203                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1204         if (ret)
1205                 goto out;
1206 
1207         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1208                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1209                 ret = -EFAULT;
1210         } else if (copy_to_user(useraddr +
1211                               offsetof(struct ethtool_rxfh, rss_config[0]),
1212                               rss_config, total_size)) {
1213                 ret = -EFAULT;
1214         }
1215 out:
1216         kfree(rss_config);
1217 
1218         return ret;
1219 }
1220 
1221 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1222                                                void __user *useraddr)
1223 {
1224         int ret;
1225         const struct ethtool_ops *ops = dev->ethtool_ops;
1226         struct ethtool_rxnfc rx_rings;
1227         struct ethtool_rxfh rxfh;
1228         u32 dev_indir_size = 0, dev_key_size = 0, i;
1229         u32 *indir = NULL, indir_bytes = 0;
1230         u8 *hkey = NULL;
1231         u8 *rss_config;
1232         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1233         bool delete = false;
1234 
1235         if (!ops->get_rxnfc || !ops->set_rxfh)
1236                 return -EOPNOTSUPP;
1237 
1238         if (ops->get_rxfh_indir_size)
1239                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1240         if (ops->get_rxfh_key_size)
1241                 dev_key_size = ops->get_rxfh_key_size(dev);
1242 
1243         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1244                 return -EFAULT;
1245 
1246         /* Check that reserved fields are 0 for now */
1247         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1248                 return -EINVAL;
1249         /* Most drivers don't handle rss_context, check it's 0 as well */
1250         if (rxfh.rss_context && !ops->set_rxfh_context)
1251                 return -EOPNOTSUPP;
1252 
1253         /* If either indir, hash key or function is valid, proceed further.
1254          * Must request at least one change: indir size, hash key or function.
1255          */
1256         if ((rxfh.indir_size &&
1257              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1258              rxfh.indir_size != dev_indir_size) ||
1259             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1260             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1261              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1262                 return -EINVAL;
1263 
1264         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1265                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1266 
1267         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1268         if (!rss_config)
1269                 return -ENOMEM;
1270 
1271         rx_rings.cmd = ETHTOOL_GRXRINGS;
1272         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1273         if (ret)
1274                 goto out;
1275 
1276         /* rxfh.indir_size == 0 means reset the indir table to default (master
1277          * context) or delete the context (other RSS contexts).
1278          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1279          */
1280         if (rxfh.indir_size &&
1281             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1282                 indir = (u32 *)rss_config;
1283                 ret = ethtool_copy_validate_indir(indir,
1284                                                   useraddr + rss_cfg_offset,
1285                                                   &rx_rings,
1286                                                   rxfh.indir_size);
1287                 if (ret)
1288                         goto out;
1289         } else if (rxfh.indir_size == 0) {
1290                 if (rxfh.rss_context == 0) {
1291                         indir = (u32 *)rss_config;
1292                         for (i = 0; i < dev_indir_size; i++)
1293                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1294                 } else {
1295                         delete = true;
1296                 }
1297         }
1298 
1299         if (rxfh.key_size) {
1300                 hkey = rss_config + indir_bytes;
1301                 if (copy_from_user(hkey,
1302                                    useraddr + rss_cfg_offset + indir_bytes,
1303                                    rxfh.key_size)) {
1304                         ret = -EFAULT;
1305                         goto out;
1306                 }
1307         }
1308 
1309         if (rxfh.rss_context)
1310                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1311                                             &rxfh.rss_context, delete);
1312         else
1313                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1314         if (ret)
1315                 goto out;
1316 
1317         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1318                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1319                 ret = -EFAULT;
1320 
1321         if (!rxfh.rss_context) {
1322                 /* indicate whether rxfh was set to default */
1323                 if (rxfh.indir_size == 0)
1324                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1325                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1326                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1327         }
1328 
1329 out:
1330         kfree(rss_config);
1331         return ret;
1332 }
1333 
1334 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1335 {
1336         struct ethtool_regs regs;
1337         const struct ethtool_ops *ops = dev->ethtool_ops;
1338         void *regbuf;
1339         int reglen, ret;
1340 
1341         if (!ops->get_regs || !ops->get_regs_len)
1342                 return -EOPNOTSUPP;
1343 
1344         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1345                 return -EFAULT;
1346 
1347         reglen = ops->get_regs_len(dev);
1348         if (reglen <= 0)
1349                 return reglen;
1350 
1351         if (regs.len > reglen)
1352                 regs.len = reglen;
1353 
1354         regbuf = vzalloc(reglen);
1355         if (!regbuf)
1356                 return -ENOMEM;
1357 
1358         if (regs.len < reglen)
1359                 reglen = regs.len;
1360 
1361         ops->get_regs(dev, &regs, regbuf);
1362 
1363         ret = -EFAULT;
1364         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1365                 goto out;
1366         useraddr += offsetof(struct ethtool_regs, data);
1367         if (copy_to_user(useraddr, regbuf, reglen))
1368                 goto out;
1369         ret = 0;
1370 
1371  out:
1372         vfree(regbuf);
1373         return ret;
1374 }
1375 
1376 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1377 {
1378         struct ethtool_value reset;
1379         int ret;
1380 
1381         if (!dev->ethtool_ops->reset)
1382                 return -EOPNOTSUPP;
1383 
1384         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1385                 return -EFAULT;
1386 
1387         ret = dev->ethtool_ops->reset(dev, &reset.data);
1388         if (ret)
1389                 return ret;
1390 
1391         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1392                 return -EFAULT;
1393         return 0;
1394 }
1395 
1396 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1397 {
1398         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1399 
1400         if (!dev->ethtool_ops->get_wol)
1401                 return -EOPNOTSUPP;
1402 
1403         dev->ethtool_ops->get_wol(dev, &wol);
1404 
1405         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1406                 return -EFAULT;
1407         return 0;
1408 }
1409 
1410 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1411 {
1412         struct ethtool_wolinfo wol;
1413         int ret;
1414 
1415         if (!dev->ethtool_ops->set_wol)
1416                 return -EOPNOTSUPP;
1417 
1418         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1419                 return -EFAULT;
1420 
1421         ret = dev->ethtool_ops->set_wol(dev, &wol);
1422         if (ret)
1423                 return ret;
1424 
1425         dev->wol_enabled = !!wol.wolopts;
1426 
1427         return 0;
1428 }
1429 
1430 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1431 {
1432         struct ethtool_eee edata;
1433         int rc;
1434 
1435         if (!dev->ethtool_ops->get_eee)
1436                 return -EOPNOTSUPP;
1437 
1438         memset(&edata, 0, sizeof(struct ethtool_eee));
1439         edata.cmd = ETHTOOL_GEEE;
1440         rc = dev->ethtool_ops->get_eee(dev, &edata);
1441 
1442         if (rc)
1443                 return rc;
1444 
1445         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1446                 return -EFAULT;
1447 
1448         return 0;
1449 }
1450 
1451 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1452 {
1453         struct ethtool_eee edata;
1454 
1455         if (!dev->ethtool_ops->set_eee)
1456                 return -EOPNOTSUPP;
1457 
1458         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1459                 return -EFAULT;
1460 
1461         return dev->ethtool_ops->set_eee(dev, &edata);
1462 }
1463 
1464 static int ethtool_nway_reset(struct net_device *dev)
1465 {
1466         if (!dev->ethtool_ops->nway_reset)
1467                 return -EOPNOTSUPP;
1468 
1469         return dev->ethtool_ops->nway_reset(dev);
1470 }
1471 
1472 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1473 {
1474         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1475 
1476         if (!dev->ethtool_ops->get_link)
1477                 return -EOPNOTSUPP;
1478 
1479         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1480 
1481         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1482                 return -EFAULT;
1483         return 0;
1484 }
1485 
1486 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1487                                   int (*getter)(struct net_device *,
1488                                                 struct ethtool_eeprom *, u8 *),
1489                                   u32 total_len)
1490 {
1491         struct ethtool_eeprom eeprom;
1492         void __user *userbuf = useraddr + sizeof(eeprom);
1493         u32 bytes_remaining;
1494         u8 *data;
1495         int ret = 0;
1496 
1497         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1498                 return -EFAULT;
1499 
1500         /* Check for wrap and zero */
1501         if (eeprom.offset + eeprom.len <= eeprom.offset)
1502                 return -EINVAL;
1503 
1504         /* Check for exceeding total eeprom len */
1505         if (eeprom.offset + eeprom.len > total_len)
1506                 return -EINVAL;
1507 
1508         data = kmalloc(PAGE_SIZE, GFP_USER);
1509         if (!data)
1510                 return -ENOMEM;
1511 
1512         bytes_remaining = eeprom.len;
1513         while (bytes_remaining > 0) {
1514                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1515 
1516                 ret = getter(dev, &eeprom, data);
1517                 if (ret)
1518                         break;
1519                 if (copy_to_user(userbuf, data, eeprom.len)) {
1520                         ret = -EFAULT;
1521                         break;
1522                 }
1523                 userbuf += eeprom.len;
1524                 eeprom.offset += eeprom.len;
1525                 bytes_remaining -= eeprom.len;
1526         }
1527 
1528         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1529         eeprom.offset -= eeprom.len;
1530         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1531                 ret = -EFAULT;
1532 
1533         kfree(data);
1534         return ret;
1535 }
1536 
1537 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1538 {
1539         const struct ethtool_ops *ops = dev->ethtool_ops;
1540 
1541         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1542             !ops->get_eeprom_len(dev))
1543                 return -EOPNOTSUPP;
1544 
1545         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1546                                       ops->get_eeprom_len(dev));
1547 }
1548 
1549 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1550 {
1551         struct ethtool_eeprom eeprom;
1552         const struct ethtool_ops *ops = dev->ethtool_ops;
1553         void __user *userbuf = useraddr + sizeof(eeprom);
1554         u32 bytes_remaining;
1555         u8 *data;
1556         int ret = 0;
1557 
1558         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1559             !ops->get_eeprom_len(dev))
1560                 return -EOPNOTSUPP;
1561 
1562         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1563                 return -EFAULT;
1564 
1565         /* Check for wrap and zero */
1566         if (eeprom.offset + eeprom.len <= eeprom.offset)
1567                 return -EINVAL;
1568 
1569         /* Check for exceeding total eeprom len */
1570         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1571                 return -EINVAL;
1572 
1573         data = kmalloc(PAGE_SIZE, GFP_USER);
1574         if (!data)
1575                 return -ENOMEM;
1576 
1577         bytes_remaining = eeprom.len;
1578         while (bytes_remaining > 0) {
1579                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1580 
1581                 if (copy_from_user(data, userbuf, eeprom.len)) {
1582                         ret = -EFAULT;
1583                         break;
1584                 }
1585                 ret = ops->set_eeprom(dev, &eeprom, data);
1586                 if (ret)
1587                         break;
1588                 userbuf += eeprom.len;
1589                 eeprom.offset += eeprom.len;
1590                 bytes_remaining -= eeprom.len;
1591         }
1592 
1593         kfree(data);
1594         return ret;
1595 }
1596 
1597 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1598                                                    void __user *useraddr)
1599 {
1600         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1601 
1602         if (!dev->ethtool_ops->get_coalesce)
1603                 return -EOPNOTSUPP;
1604 
1605         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1606 
1607         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1608                 return -EFAULT;
1609         return 0;
1610 }
1611 
1612 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1613                                                    void __user *useraddr)
1614 {
1615         struct ethtool_coalesce coalesce;
1616 
1617         if (!dev->ethtool_ops->set_coalesce)
1618                 return -EOPNOTSUPP;
1619 
1620         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1621                 return -EFAULT;
1622 
1623         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1624 }
1625 
1626 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1627 {
1628         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1629 
1630         if (!dev->ethtool_ops->get_ringparam)
1631                 return -EOPNOTSUPP;
1632 
1633         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1634 
1635         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1636                 return -EFAULT;
1637         return 0;
1638 }
1639 
1640 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1641 {
1642         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1643 
1644         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1645                 return -EOPNOTSUPP;
1646 
1647         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1648                 return -EFAULT;
1649 
1650         dev->ethtool_ops->get_ringparam(dev, &max);
1651 
1652         /* ensure new ring parameters are within the maximums */
1653         if (ringparam.rx_pending > max.rx_max_pending ||
1654             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1655             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1656             ringparam.tx_pending > max.tx_max_pending)
1657                 return -EINVAL;
1658 
1659         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1660 }
1661 
1662 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1663                                                    void __user *useraddr)
1664 {
1665         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1666 
1667         if (!dev->ethtool_ops->get_channels)
1668                 return -EOPNOTSUPP;
1669 
1670         dev->ethtool_ops->get_channels(dev, &channels);
1671 
1672         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1673                 return -EFAULT;
1674         return 0;
1675 }
1676 
1677 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1678                                                    void __user *useraddr)
1679 {
1680         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1681         u16 from_channel, to_channel;
1682         u32 max_rx_in_use = 0;
1683         unsigned int i;
1684 
1685         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1686                 return -EOPNOTSUPP;
1687 
1688         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1689                 return -EFAULT;
1690 
1691         dev->ethtool_ops->get_channels(dev, &curr);
1692 
1693         /* ensure new counts are within the maximums */
1694         if (channels.rx_count > curr.max_rx ||
1695             channels.tx_count > curr.max_tx ||
1696             channels.combined_count > curr.max_combined ||
1697             channels.other_count > curr.max_other)
1698                 return -EINVAL;
1699 
1700         /* ensure the new Rx count fits within the configured Rx flow
1701          * indirection table settings */
1702         if (netif_is_rxfh_configured(dev) &&
1703             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1704             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1705             return -EINVAL;
1706 
1707         /* Disabling channels, query zero-copy AF_XDP sockets */
1708         from_channel = channels.combined_count +
1709                 min(channels.rx_count, channels.tx_count);
1710         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1711         for (i = from_channel; i < to_channel; i++)
1712                 if (xdp_get_umem_from_qid(dev, i))
1713                         return -EINVAL;
1714 
1715         return dev->ethtool_ops->set_channels(dev, &channels);
1716 }
1717 
1718 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1719 {
1720         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1721 
1722         if (!dev->ethtool_ops->get_pauseparam)
1723                 return -EOPNOTSUPP;
1724 
1725         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1726 
1727         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1728                 return -EFAULT;
1729         return 0;
1730 }
1731 
1732 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1733 {
1734         struct ethtool_pauseparam pauseparam;
1735 
1736         if (!dev->ethtool_ops->set_pauseparam)
1737                 return -EOPNOTSUPP;
1738 
1739         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1740                 return -EFAULT;
1741 
1742         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1743 }
1744 
1745 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1746 {
1747         struct ethtool_test test;
1748         const struct ethtool_ops *ops = dev->ethtool_ops;
1749         u64 *data;
1750         int ret, test_len;
1751 
1752         if (!ops->self_test || !ops->get_sset_count)
1753                 return -EOPNOTSUPP;
1754 
1755         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1756         if (test_len < 0)
1757                 return test_len;
1758         WARN_ON(test_len == 0);
1759 
1760         if (copy_from_user(&test, useraddr, sizeof(test)))
1761                 return -EFAULT;
1762 
1763         test.len = test_len;
1764         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1765         if (!data)
1766                 return -ENOMEM;
1767 
1768         ops->self_test(dev, &test, data);
1769 
1770         ret = -EFAULT;
1771         if (copy_to_user(useraddr, &test, sizeof(test)))
1772                 goto out;
1773         useraddr += sizeof(test);
1774         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1775                 goto out;
1776         ret = 0;
1777 
1778  out:
1779         kfree(data);
1780         return ret;
1781 }
1782 
1783 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1784 {
1785         struct ethtool_gstrings gstrings;
1786         u8 *data;
1787         int ret;
1788 
1789         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1790                 return -EFAULT;
1791 
1792         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1793         if (ret < 0)
1794                 return ret;
1795         if (ret > S32_MAX / ETH_GSTRING_LEN)
1796                 return -ENOMEM;
1797         WARN_ON_ONCE(!ret);
1798 
1799         gstrings.len = ret;
1800 
1801         if (gstrings.len) {
1802                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1803                 if (!data)
1804                         return -ENOMEM;
1805 
1806                 __ethtool_get_strings(dev, gstrings.string_set, data);
1807         } else {
1808                 data = NULL;
1809         }
1810 
1811         ret = -EFAULT;
1812         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1813                 goto out;
1814         useraddr += sizeof(gstrings);
1815         if (gstrings.len &&
1816             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1817                 goto out;
1818         ret = 0;
1819 
1820 out:
1821         vfree(data);
1822         return ret;
1823 }
1824 
1825 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1826 {
1827         struct ethtool_value id;
1828         static bool busy;
1829         const struct ethtool_ops *ops = dev->ethtool_ops;
1830         int rc;
1831 
1832         if (!ops->set_phys_id)
1833                 return -EOPNOTSUPP;
1834 
1835         if (busy)
1836                 return -EBUSY;
1837 
1838         if (copy_from_user(&id, useraddr, sizeof(id)))
1839                 return -EFAULT;
1840 
1841         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1842         if (rc < 0)
1843                 return rc;
1844 
1845         /* Drop the RTNL lock while waiting, but prevent reentry or
1846          * removal of the device.
1847          */
1848         busy = true;
1849         dev_hold(dev);
1850         rtnl_unlock();
1851 
1852         if (rc == 0) {
1853                 /* Driver will handle this itself */
1854                 schedule_timeout_interruptible(
1855                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1856         } else {
1857                 /* Driver expects to be called at twice the frequency in rc */
1858                 int n = rc * 2, i, interval = HZ / n;
1859 
1860                 /* Count down seconds */
1861                 do {
1862                         /* Count down iterations per second */
1863                         i = n;
1864                         do {
1865                                 rtnl_lock();
1866                                 rc = ops->set_phys_id(dev,
1867                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1868                                 rtnl_unlock();
1869                                 if (rc)
1870                                         break;
1871                                 schedule_timeout_interruptible(interval);
1872                         } while (!signal_pending(current) && --i != 0);
1873                 } while (!signal_pending(current) &&
1874                          (id.data == 0 || --id.data != 0));
1875         }
1876 
1877         rtnl_lock();
1878         dev_put(dev);
1879         busy = false;
1880 
1881         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1882         return rc;
1883 }
1884 
1885 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1886 {
1887         struct ethtool_stats stats;
1888         const struct ethtool_ops *ops = dev->ethtool_ops;
1889         u64 *data;
1890         int ret, n_stats;
1891 
1892         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1893                 return -EOPNOTSUPP;
1894 
1895         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1896         if (n_stats < 0)
1897                 return n_stats;
1898         if (n_stats > S32_MAX / sizeof(u64))
1899                 return -ENOMEM;
1900         WARN_ON_ONCE(!n_stats);
1901         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1902                 return -EFAULT;
1903 
1904         stats.n_stats = n_stats;
1905 
1906         if (n_stats) {
1907                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1908                 if (!data)
1909                         return -ENOMEM;
1910                 ops->get_ethtool_stats(dev, &stats, data);
1911         } else {
1912                 data = NULL;
1913         }
1914 
1915         ret = -EFAULT;
1916         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1917                 goto out;
1918         useraddr += sizeof(stats);
1919         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1920                 goto out;
1921         ret = 0;
1922 
1923  out:
1924         vfree(data);
1925         return ret;
1926 }
1927 
1928 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1929 {
1930         const struct ethtool_ops *ops = dev->ethtool_ops;
1931         struct phy_device *phydev = dev->phydev;
1932         struct ethtool_stats stats;
1933         u64 *data;
1934         int ret, n_stats;
1935 
1936         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1937                 return -EOPNOTSUPP;
1938 
1939         if (dev->phydev && !ops->get_ethtool_phy_stats)
1940                 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1941         else
1942                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1943         if (n_stats < 0)
1944                 return n_stats;
1945         if (n_stats > S32_MAX / sizeof(u64))
1946                 return -ENOMEM;
1947         WARN_ON_ONCE(!n_stats);
1948 
1949         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1950                 return -EFAULT;
1951 
1952         stats.n_stats = n_stats;
1953 
1954         if (n_stats) {
1955                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1956                 if (!data)
1957                         return -ENOMEM;
1958 
1959                 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1960                         ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1961                         if (ret < 0)
1962                                 goto out;
1963                 } else {
1964                         ops->get_ethtool_phy_stats(dev, &stats, data);
1965                 }
1966         } else {
1967                 data = NULL;
1968         }
1969 
1970         ret = -EFAULT;
1971         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1972                 goto out;
1973         useraddr += sizeof(stats);
1974         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1975                 goto out;
1976         ret = 0;
1977 
1978  out:
1979         vfree(data);
1980         return ret;
1981 }
1982 
1983 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1984 {
1985         struct ethtool_perm_addr epaddr;
1986 
1987         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1988                 return -EFAULT;
1989 
1990         if (epaddr.size < dev->addr_len)
1991                 return -ETOOSMALL;
1992         epaddr.size = dev->addr_len;
1993 
1994         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1995                 return -EFAULT;
1996         useraddr += sizeof(epaddr);
1997         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1998                 return -EFAULT;
1999         return 0;
2000 }
2001 
2002 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2003                              u32 cmd, u32 (*actor)(struct net_device *))
2004 {
2005         struct ethtool_value edata = { .cmd = cmd };
2006 
2007         if (!actor)
2008                 return -EOPNOTSUPP;
2009 
2010         edata.data = actor(dev);
2011 
2012         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2013                 return -EFAULT;
2014         return 0;
2015 }
2016 
2017 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2018                              void (*actor)(struct net_device *, u32))
2019 {
2020         struct ethtool_value edata;
2021 
2022         if (!actor)
2023                 return -EOPNOTSUPP;
2024 
2025         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2026                 return -EFAULT;
2027 
2028         actor(dev, edata.data);
2029         return 0;
2030 }
2031 
2032 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2033                              int (*actor)(struct net_device *, u32))
2034 {
2035         struct ethtool_value edata;
2036 
2037         if (!actor)
2038                 return -EOPNOTSUPP;
2039 
2040         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2041                 return -EFAULT;
2042 
2043         return actor(dev, edata.data);
2044 }
2045 
2046 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2047                                                    char __user *useraddr)
2048 {
2049         struct ethtool_flash efl;
2050 
2051         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2052                 return -EFAULT;
2053         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2054 
2055         if (!dev->ethtool_ops->flash_device)
2056                 return devlink_compat_flash_update(dev, efl.data);
2057 
2058         return dev->ethtool_ops->flash_device(dev, &efl);
2059 }
2060 
2061 static int ethtool_set_dump(struct net_device *dev,
2062                         void __user *useraddr)
2063 {
2064         struct ethtool_dump dump;
2065 
2066         if (!dev->ethtool_ops->set_dump)
2067                 return -EOPNOTSUPP;
2068 
2069         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2070                 return -EFAULT;
2071 
2072         return dev->ethtool_ops->set_dump(dev, &dump);
2073 }
2074 
2075 static int ethtool_get_dump_flag(struct net_device *dev,
2076                                 void __user *useraddr)
2077 {
2078         int ret;
2079         struct ethtool_dump dump;
2080         const struct ethtool_ops *ops = dev->ethtool_ops;
2081 
2082         if (!ops->get_dump_flag)
2083                 return -EOPNOTSUPP;
2084 
2085         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2086                 return -EFAULT;
2087 
2088         ret = ops->get_dump_flag(dev, &dump);
2089         if (ret)
2090                 return ret;
2091 
2092         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2093                 return -EFAULT;
2094         return 0;
2095 }
2096 
2097 static int ethtool_get_dump_data(struct net_device *dev,
2098                                 void __user *useraddr)
2099 {
2100         int ret;
2101         __u32 len;
2102         struct ethtool_dump dump, tmp;
2103         const struct ethtool_ops *ops = dev->ethtool_ops;
2104         void *data = NULL;
2105 
2106         if (!ops->get_dump_data || !ops->get_dump_flag)
2107                 return -EOPNOTSUPP;
2108 
2109         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2110                 return -EFAULT;
2111 
2112         memset(&tmp, 0, sizeof(tmp));
2113         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2114         ret = ops->get_dump_flag(dev, &tmp);
2115         if (ret)
2116                 return ret;
2117 
2118         len = min(tmp.len, dump.len);
2119         if (!len)
2120                 return -EFAULT;
2121 
2122         /* Don't ever let the driver think there's more space available
2123          * than it requested with .get_dump_flag().
2124          */
2125         dump.len = len;
2126 
2127         /* Always allocate enough space to hold the whole thing so that the
2128          * driver does not need to check the length and bother with partial
2129          * dumping.
2130          */
2131         data = vzalloc(tmp.len);
2132         if (!data)
2133                 return -ENOMEM;
2134         ret = ops->get_dump_data(dev, &dump, data);
2135         if (ret)
2136                 goto out;
2137 
2138         /* There are two sane possibilities:
2139          * 1. The driver's .get_dump_data() does not touch dump.len.
2140          * 2. Or it may set dump.len to how much it really writes, which
2141          *    should be tmp.len (or len if it can do a partial dump).
2142          * In any case respond to userspace with the actual length of data
2143          * it's receiving.
2144          */
2145         WARN_ON(dump.len != len && dump.len != tmp.len);
2146         dump.len = len;
2147 
2148         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2149                 ret = -EFAULT;
2150                 goto out;
2151         }
2152         useraddr += offsetof(struct ethtool_dump, data);
2153         if (copy_to_user(useraddr, data, len))
2154                 ret = -EFAULT;
2155 out:
2156         vfree(data);
2157         return ret;
2158 }
2159 
2160 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2161 {
2162         int err = 0;
2163         struct ethtool_ts_info info;
2164         const struct ethtool_ops *ops = dev->ethtool_ops;
2165         struct phy_device *phydev = dev->phydev;
2166 
2167         memset(&info, 0, sizeof(info));
2168         info.cmd = ETHTOOL_GET_TS_INFO;
2169 
2170         if (phydev && phydev->drv && phydev->drv->ts_info) {
2171                 err = phydev->drv->ts_info(phydev, &info);
2172         } else if (ops->get_ts_info) {
2173                 err = ops->get_ts_info(dev, &info);
2174         } else {
2175                 info.so_timestamping =
2176                         SOF_TIMESTAMPING_RX_SOFTWARE |
2177                         SOF_TIMESTAMPING_SOFTWARE;
2178                 info.phc_index = -1;
2179         }
2180 
2181         if (err)
2182                 return err;
2183 
2184         if (copy_to_user(useraddr, &info, sizeof(info)))
2185                 err = -EFAULT;
2186 
2187         return err;
2188 }
2189 
2190 static int __ethtool_get_module_info(struct net_device *dev,
2191                                      struct ethtool_modinfo *modinfo)
2192 {
2193         const struct ethtool_ops *ops = dev->ethtool_ops;
2194         struct phy_device *phydev = dev->phydev;
2195 
2196         if (dev->sfp_bus)
2197                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2198 
2199         if (phydev && phydev->drv && phydev->drv->module_info)
2200                 return phydev->drv->module_info(phydev, modinfo);
2201 
2202         if (ops->get_module_info)
2203                 return ops->get_module_info(dev, modinfo);
2204 
2205         return -EOPNOTSUPP;
2206 }
2207 
2208 static int ethtool_get_module_info(struct net_device *dev,
2209                                    void __user *useraddr)
2210 {
2211         int ret;
2212         struct ethtool_modinfo modinfo;
2213 
2214         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2215                 return -EFAULT;
2216 
2217         ret = __ethtool_get_module_info(dev, &modinfo);
2218         if (ret)
2219                 return ret;
2220 
2221         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2222                 return -EFAULT;
2223 
2224         return 0;
2225 }
2226 
2227 static int __ethtool_get_module_eeprom(struct net_device *dev,
2228                                        struct ethtool_eeprom *ee, u8 *data)
2229 {
2230         const struct ethtool_ops *ops = dev->ethtool_ops;
2231         struct phy_device *phydev = dev->phydev;
2232 
2233         if (dev->sfp_bus)
2234                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2235 
2236         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2237                 return phydev->drv->module_eeprom(phydev, ee, data);
2238 
2239         if (ops->get_module_eeprom)
2240                 return ops->get_module_eeprom(dev, ee, data);
2241 
2242         return -EOPNOTSUPP;
2243 }
2244 
2245 static int ethtool_get_module_eeprom(struct net_device *dev,
2246                                      void __user *useraddr)
2247 {
2248         int ret;
2249         struct ethtool_modinfo modinfo;
2250 
2251         ret = __ethtool_get_module_info(dev, &modinfo);
2252         if (ret)
2253                 return ret;
2254 
2255         return ethtool_get_any_eeprom(dev, useraddr,
2256                                       __ethtool_get_module_eeprom,
2257                                       modinfo.eeprom_len);
2258 }
2259 
2260 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2261 {
2262         switch (tuna->id) {
2263         case ETHTOOL_RX_COPYBREAK:
2264         case ETHTOOL_TX_COPYBREAK:
2265                 if (tuna->len != sizeof(u32) ||
2266                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2267                         return -EINVAL;
2268                 break;
2269         case ETHTOOL_PFC_PREVENTION_TOUT:
2270                 if (tuna->len != sizeof(u16) ||
2271                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2272                         return -EINVAL;
2273                 break;
2274         default:
2275                 return -EINVAL;
2276         }
2277 
2278         return 0;
2279 }
2280 
2281 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2282 {
2283         int ret;
2284         struct ethtool_tunable tuna;
2285         const struct ethtool_ops *ops = dev->ethtool_ops;
2286         void *data;
2287 
2288         if (!ops->get_tunable)
2289                 return -EOPNOTSUPP;
2290         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2291                 return -EFAULT;
2292         ret = ethtool_tunable_valid(&tuna);
2293         if (ret)
2294                 return ret;
2295         data = kmalloc(tuna.len, GFP_USER);
2296         if (!data)
2297                 return -ENOMEM;
2298         ret = ops->get_tunable(dev, &tuna, data);
2299         if (ret)
2300                 goto out;
2301         useraddr += sizeof(tuna);
2302         ret = -EFAULT;
2303         if (copy_to_user(useraddr, data, tuna.len))
2304                 goto out;
2305         ret = 0;
2306 
2307 out:
2308         kfree(data);
2309         return ret;
2310 }
2311 
2312 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2313 {
2314         int ret;
2315         struct ethtool_tunable tuna;
2316         const struct ethtool_ops *ops = dev->ethtool_ops;
2317         void *data;
2318 
2319         if (!ops->set_tunable)
2320                 return -EOPNOTSUPP;
2321         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2322                 return -EFAULT;
2323         ret = ethtool_tunable_valid(&tuna);
2324         if (ret)
2325                 return ret;
2326         useraddr += sizeof(tuna);
2327         data = memdup_user(useraddr, tuna.len);
2328         if (IS_ERR(data))
2329                 return PTR_ERR(data);
2330         ret = ops->set_tunable(dev, &tuna, data);
2331 
2332         kfree(data);
2333         return ret;
2334 }
2335 
2336 static noinline_for_stack int
2337 ethtool_get_per_queue_coalesce(struct net_device *dev,
2338                                void __user *useraddr,
2339                                struct ethtool_per_queue_op *per_queue_opt)
2340 {
2341         u32 bit;
2342         int ret;
2343         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2344 
2345         if (!dev->ethtool_ops->get_per_queue_coalesce)
2346                 return -EOPNOTSUPP;
2347 
2348         useraddr += sizeof(*per_queue_opt);
2349 
2350         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2351                           MAX_NUM_QUEUE);
2352 
2353         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2354                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2355 
2356                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2357                 if (ret != 0)
2358                         return ret;
2359                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2360                         return -EFAULT;
2361                 useraddr += sizeof(coalesce);
2362         }
2363 
2364         return 0;
2365 }
2366 
2367 static noinline_for_stack int
2368 ethtool_set_per_queue_coalesce(struct net_device *dev,
2369                                void __user *useraddr,
2370                                struct ethtool_per_queue_op *per_queue_opt)
2371 {
2372         u32 bit;
2373         int i, ret = 0;
2374         int n_queue;
2375         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2376         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2377 
2378         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2379             (!dev->ethtool_ops->get_per_queue_coalesce))
2380                 return -EOPNOTSUPP;
2381 
2382         useraddr += sizeof(*per_queue_opt);
2383 
2384         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2385         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2386         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2387         if (!backup)
2388                 return -ENOMEM;
2389 
2390         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2391                 struct ethtool_coalesce coalesce;
2392 
2393                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2394                 if (ret != 0)
2395                         goto roll_back;
2396 
2397                 tmp++;
2398 
2399                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2400                         ret = -EFAULT;
2401                         goto roll_back;
2402                 }
2403 
2404                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2405                 if (ret != 0)
2406                         goto roll_back;
2407 
2408                 useraddr += sizeof(coalesce);
2409         }
2410 
2411 roll_back:
2412         if (ret != 0) {
2413                 tmp = backup;
2414                 for_each_set_bit(i, queue_mask, bit) {
2415                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2416                         tmp++;
2417                 }
2418         }
2419         kfree(backup);
2420 
2421         return ret;
2422 }
2423 
2424 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2425                                  void __user *useraddr, u32 sub_cmd)
2426 {
2427         struct ethtool_per_queue_op per_queue_opt;
2428 
2429         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2430                 return -EFAULT;
2431 
2432         if (per_queue_opt.sub_command != sub_cmd)
2433                 return -EINVAL;
2434 
2435         switch (per_queue_opt.sub_command) {
2436         case ETHTOOL_GCOALESCE:
2437                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2438         case ETHTOOL_SCOALESCE:
2439                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2440         default:
2441                 return -EOPNOTSUPP;
2442         };
2443 }
2444 
2445 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2446 {
2447         switch (tuna->id) {
2448         case ETHTOOL_PHY_DOWNSHIFT:
2449         case ETHTOOL_PHY_FAST_LINK_DOWN:
2450                 if (tuna->len != sizeof(u8) ||
2451                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2452                         return -EINVAL;
2453                 break;
2454         default:
2455                 return -EINVAL;
2456         }
2457 
2458         return 0;
2459 }
2460 
2461 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2462 {
2463         int ret;
2464         struct ethtool_tunable tuna;
2465         struct phy_device *phydev = dev->phydev;
2466         void *data;
2467 
2468         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2469                 return -EOPNOTSUPP;
2470 
2471         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2472                 return -EFAULT;
2473         ret = ethtool_phy_tunable_valid(&tuna);
2474         if (ret)
2475                 return ret;
2476         data = kmalloc(tuna.len, GFP_USER);
2477         if (!data)
2478                 return -ENOMEM;
2479         mutex_lock(&phydev->lock);
2480         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2481         mutex_unlock(&phydev->lock);
2482         if (ret)
2483                 goto out;
2484         useraddr += sizeof(tuna);
2485         ret = -EFAULT;
2486         if (copy_to_user(useraddr, data, tuna.len))
2487                 goto out;
2488         ret = 0;
2489 
2490 out:
2491         kfree(data);
2492         return ret;
2493 }
2494 
2495 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2496 {
2497         int ret;
2498         struct ethtool_tunable tuna;
2499         struct phy_device *phydev = dev->phydev;
2500         void *data;
2501 
2502         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2503                 return -EOPNOTSUPP;
2504         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2505                 return -EFAULT;
2506         ret = ethtool_phy_tunable_valid(&tuna);
2507         if (ret)
2508                 return ret;
2509         useraddr += sizeof(tuna);
2510         data = memdup_user(useraddr, tuna.len);
2511         if (IS_ERR(data))
2512                 return PTR_ERR(data);
2513         mutex_lock(&phydev->lock);
2514         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2515         mutex_unlock(&phydev->lock);
2516 
2517         kfree(data);
2518         return ret;
2519 }
2520 
2521 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2522 {
2523         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2524         int rc;
2525 
2526         if (!dev->ethtool_ops->get_fecparam)
2527                 return -EOPNOTSUPP;
2528 
2529         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2530         if (rc)
2531                 return rc;
2532 
2533         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2534                 return -EFAULT;
2535         return 0;
2536 }
2537 
2538 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2539 {
2540         struct ethtool_fecparam fecparam;
2541 
2542         if (!dev->ethtool_ops->set_fecparam)
2543                 return -EOPNOTSUPP;
2544 
2545         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2546                 return -EFAULT;
2547 
2548         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2549 }
2550 
2551 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2552 
2553 int dev_ethtool(struct net *net, struct ifreq *ifr)
2554 {
2555         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2556         void __user *useraddr = ifr->ifr_data;
2557         u32 ethcmd, sub_cmd;
2558         int rc;
2559         netdev_features_t old_features;
2560 
2561         if (!dev || !netif_device_present(dev))
2562                 return -ENODEV;
2563 
2564         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2565                 return -EFAULT;
2566 
2567         if (ethcmd == ETHTOOL_PERQUEUE) {
2568                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2569                         return -EFAULT;
2570         } else {
2571                 sub_cmd = ethcmd;
2572         }
2573         /* Allow some commands to be done by anyone */
2574         switch (sub_cmd) {
2575         case ETHTOOL_GSET:
2576         case ETHTOOL_GDRVINFO:
2577         case ETHTOOL_GMSGLVL:
2578         case ETHTOOL_GLINK:
2579         case ETHTOOL_GCOALESCE:
2580         case ETHTOOL_GRINGPARAM:
2581         case ETHTOOL_GPAUSEPARAM:
2582         case ETHTOOL_GRXCSUM:
2583         case ETHTOOL_GTXCSUM:
2584         case ETHTOOL_GSG:
2585         case ETHTOOL_GSSET_INFO:
2586         case ETHTOOL_GSTRINGS:
2587         case ETHTOOL_GSTATS:
2588         case ETHTOOL_GPHYSTATS:
2589         case ETHTOOL_GTSO:
2590         case ETHTOOL_GPERMADDR:
2591         case ETHTOOL_GUFO:
2592         case ETHTOOL_GGSO:
2593         case ETHTOOL_GGRO:
2594         case ETHTOOL_GFLAGS:
2595         case ETHTOOL_GPFLAGS:
2596         case ETHTOOL_GRXFH:
2597         case ETHTOOL_GRXRINGS:
2598         case ETHTOOL_GRXCLSRLCNT:
2599         case ETHTOOL_GRXCLSRULE:
2600         case ETHTOOL_GRXCLSRLALL:
2601         case ETHTOOL_GRXFHINDIR:
2602         case ETHTOOL_GRSSH:
2603         case ETHTOOL_GFEATURES:
2604         case ETHTOOL_GCHANNELS:
2605         case ETHTOOL_GET_TS_INFO:
2606         case ETHTOOL_GEEE:
2607         case ETHTOOL_GTUNABLE:
2608         case ETHTOOL_PHY_GTUNABLE:
2609         case ETHTOOL_GLINKSETTINGS:
2610         case ETHTOOL_GFECPARAM:
2611                 break;
2612         default:
2613                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2614                         return -EPERM;
2615         }
2616 
2617         if (dev->ethtool_ops->begin) {
2618                 rc = dev->ethtool_ops->begin(dev);
2619                 if (rc  < 0)
2620                         return rc;
2621         }
2622         old_features = dev->features;
2623 
2624         switch (ethcmd) {
2625         case ETHTOOL_GSET:
2626                 rc = ethtool_get_settings(dev, useraddr);
2627                 break;
2628         case ETHTOOL_SSET:
2629                 rc = ethtool_set_settings(dev, useraddr);
2630                 break;
2631         case ETHTOOL_GDRVINFO:
2632                 rc = ethtool_get_drvinfo(dev, useraddr);
2633                 break;
2634         case ETHTOOL_GREGS:
2635                 rc = ethtool_get_regs(dev, useraddr);
2636                 break;
2637         case ETHTOOL_GWOL:
2638                 rc = ethtool_get_wol(dev, useraddr);
2639                 break;
2640         case ETHTOOL_SWOL:
2641                 rc = ethtool_set_wol(dev, useraddr);
2642                 break;
2643         case ETHTOOL_GMSGLVL:
2644                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2645                                        dev->ethtool_ops->get_msglevel);
2646                 break;
2647         case ETHTOOL_SMSGLVL:
2648                 rc = ethtool_set_value_void(dev, useraddr,
2649                                        dev->ethtool_ops->set_msglevel);
2650                 break;
2651         case ETHTOOL_GEEE:
2652                 rc = ethtool_get_eee(dev, useraddr);
2653                 break;
2654         case ETHTOOL_SEEE:
2655                 rc = ethtool_set_eee(dev, useraddr);
2656                 break;
2657         case ETHTOOL_NWAY_RST:
2658                 rc = ethtool_nway_reset(dev);
2659                 break;
2660         case ETHTOOL_GLINK:
2661                 rc = ethtool_get_link(dev, useraddr);
2662                 break;
2663         case ETHTOOL_GEEPROM:
2664                 rc = ethtool_get_eeprom(dev, useraddr);
2665                 break;
2666         case ETHTOOL_SEEPROM:
2667                 rc = ethtool_set_eeprom(dev, useraddr);
2668                 break;
2669         case ETHTOOL_GCOALESCE:
2670                 rc = ethtool_get_coalesce(dev, useraddr);
2671                 break;
2672         case ETHTOOL_SCOALESCE:
2673                 rc = ethtool_set_coalesce(dev, useraddr);
2674                 break;
2675         case ETHTOOL_GRINGPARAM:
2676                 rc = ethtool_get_ringparam(dev, useraddr);
2677                 break;
2678         case ETHTOOL_SRINGPARAM:
2679                 rc = ethtool_set_ringparam(dev, useraddr);
2680                 break;
2681         case ETHTOOL_GPAUSEPARAM:
2682                 rc = ethtool_get_pauseparam(dev, useraddr);
2683                 break;
2684         case ETHTOOL_SPAUSEPARAM:
2685                 rc = ethtool_set_pauseparam(dev, useraddr);
2686                 break;
2687         case ETHTOOL_TEST:
2688                 rc = ethtool_self_test(dev, useraddr);
2689                 break;
2690         case ETHTOOL_GSTRINGS:
2691                 rc = ethtool_get_strings(dev, useraddr);
2692                 break;
2693         case ETHTOOL_PHYS_ID:
2694                 rc = ethtool_phys_id(dev, useraddr);
2695                 break;
2696         case ETHTOOL_GSTATS:
2697                 rc = ethtool_get_stats(dev, useraddr);
2698                 break;
2699         case ETHTOOL_GPERMADDR:
2700                 rc = ethtool_get_perm_addr(dev, useraddr);
2701                 break;
2702         case ETHTOOL_GFLAGS:
2703                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2704                                         __ethtool_get_flags);
2705                 break;
2706         case ETHTOOL_SFLAGS:
2707                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2708                 break;
2709         case ETHTOOL_GPFLAGS:
2710                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2711                                        dev->ethtool_ops->get_priv_flags);
2712                 break;
2713         case ETHTOOL_SPFLAGS:
2714                 rc = ethtool_set_value(dev, useraddr,
2715                                        dev->ethtool_ops->set_priv_flags);
2716                 break;
2717         case ETHTOOL_GRXFH:
2718         case ETHTOOL_GRXRINGS:
2719         case ETHTOOL_GRXCLSRLCNT:
2720         case ETHTOOL_GRXCLSRULE:
2721         case ETHTOOL_GRXCLSRLALL:
2722                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2723                 break;
2724         case ETHTOOL_SRXFH:
2725         case ETHTOOL_SRXCLSRLDEL:
2726         case ETHTOOL_SRXCLSRLINS:
2727                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2728                 break;
2729         case ETHTOOL_FLASHDEV:
2730                 rc = ethtool_flash_device(dev, useraddr);
2731                 break;
2732         case ETHTOOL_RESET:
2733                 rc = ethtool_reset(dev, useraddr);
2734                 break;
2735         case ETHTOOL_GSSET_INFO:
2736                 rc = ethtool_get_sset_info(dev, useraddr);
2737                 break;
2738         case ETHTOOL_GRXFHINDIR:
2739                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2740                 break;
2741         case ETHTOOL_SRXFHINDIR:
2742                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2743                 break;
2744         case ETHTOOL_GRSSH:
2745                 rc = ethtool_get_rxfh(dev, useraddr);
2746                 break;
2747         case ETHTOOL_SRSSH:
2748                 rc = ethtool_set_rxfh(dev, useraddr);
2749                 break;
2750         case ETHTOOL_GFEATURES:
2751                 rc = ethtool_get_features(dev, useraddr);
2752                 break;
2753         case ETHTOOL_SFEATURES:
2754                 rc = ethtool_set_features(dev, useraddr);
2755                 break;
2756         case ETHTOOL_GTXCSUM:
2757         case ETHTOOL_GRXCSUM:
2758         case ETHTOOL_GSG:
2759         case ETHTOOL_GTSO:
2760         case ETHTOOL_GGSO:
2761         case ETHTOOL_GGRO:
2762                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2763                 break;
2764         case ETHTOOL_STXCSUM:
2765         case ETHTOOL_SRXCSUM:
2766         case ETHTOOL_SSG:
2767         case ETHTOOL_STSO:
2768         case ETHTOOL_SGSO:
2769         case ETHTOOL_SGRO:
2770                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2771                 break;
2772         case ETHTOOL_GCHANNELS:
2773                 rc = ethtool_get_channels(dev, useraddr);
2774                 break;
2775         case ETHTOOL_SCHANNELS:
2776                 rc = ethtool_set_channels(dev, useraddr);
2777                 break;
2778         case ETHTOOL_SET_DUMP:
2779                 rc = ethtool_set_dump(dev, useraddr);
2780                 break;
2781         case ETHTOOL_GET_DUMP_FLAG:
2782                 rc = ethtool_get_dump_flag(dev, useraddr);
2783                 break;
2784         case ETHTOOL_GET_DUMP_DATA:
2785                 rc = ethtool_get_dump_data(dev, useraddr);
2786                 break;
2787         case ETHTOOL_GET_TS_INFO:
2788                 rc = ethtool_get_ts_info(dev, useraddr);
2789                 break;
2790         case ETHTOOL_GMODULEINFO:
2791                 rc = ethtool_get_module_info(dev, useraddr);
2792                 break;
2793         case ETHTOOL_GMODULEEEPROM:
2794                 rc = ethtool_get_module_eeprom(dev, useraddr);
2795                 break;
2796         case ETHTOOL_GTUNABLE:
2797                 rc = ethtool_get_tunable(dev, useraddr);
2798                 break;
2799         case ETHTOOL_STUNABLE:
2800                 rc = ethtool_set_tunable(dev, useraddr);
2801                 break;
2802         case ETHTOOL_GPHYSTATS:
2803                 rc = ethtool_get_phy_stats(dev, useraddr);
2804                 break;
2805         case ETHTOOL_PERQUEUE:
2806                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2807                 break;
2808         case ETHTOOL_GLINKSETTINGS:
2809                 rc = ethtool_get_link_ksettings(dev, useraddr);
2810                 break;
2811         case ETHTOOL_SLINKSETTINGS:
2812                 rc = ethtool_set_link_ksettings(dev, useraddr);
2813                 break;
2814         case ETHTOOL_PHY_GTUNABLE:
2815                 rc = get_phy_tunable(dev, useraddr);
2816                 break;
2817         case ETHTOOL_PHY_STUNABLE:
2818                 rc = set_phy_tunable(dev, useraddr);
2819                 break;
2820         case ETHTOOL_GFECPARAM:
2821                 rc = ethtool_get_fecparam(dev, useraddr);
2822                 break;
2823         case ETHTOOL_SFECPARAM:
2824                 rc = ethtool_set_fecparam(dev, useraddr);
2825                 break;
2826         default:
2827                 rc = -EOPNOTSUPP;
2828         }
2829 
2830         if (dev->ethtool_ops->complete)
2831                 dev->ethtool_ops->complete(dev);
2832 
2833         if (old_features != dev->features)
2834                 netdev_features_change(dev);
2835 
2836         return rc;
2837 }
2838 
2839 struct ethtool_rx_flow_key {
2840         struct flow_dissector_key_basic                 basic;
2841         union {
2842                 struct flow_dissector_key_ipv4_addrs    ipv4;
2843                 struct flow_dissector_key_ipv6_addrs    ipv6;
2844         };
2845         struct flow_dissector_key_ports                 tp;
2846         struct flow_dissector_key_ip                    ip;
2847         struct flow_dissector_key_vlan                  vlan;
2848         struct flow_dissector_key_eth_addrs             eth_addrs;
2849 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2850 
2851 struct ethtool_rx_flow_match {
2852         struct flow_dissector           dissector;
2853         struct ethtool_rx_flow_key      key;
2854         struct ethtool_rx_flow_key      mask;
2855 };
2856 
2857 struct ethtool_rx_flow_rule *
2858 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2859 {
2860         const struct ethtool_rx_flow_spec *fs = input->fs;
2861         static struct in6_addr zero_addr = {};
2862         struct ethtool_rx_flow_match *match;
2863         struct ethtool_rx_flow_rule *flow;
2864         struct flow_action_entry *act;
2865 
2866         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2867                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2868         if (!flow)
2869                 return ERR_PTR(-ENOMEM);
2870 
2871         /* ethtool_rx supports only one single action per rule. */
2872         flow->rule = flow_rule_alloc(1);
2873         if (!flow->rule) {
2874                 kfree(flow);
2875                 return ERR_PTR(-ENOMEM);
2876         }
2877 
2878         match = (struct ethtool_rx_flow_match *)flow->priv;
2879         flow->rule->match.dissector     = &match->dissector;
2880         flow->rule->match.mask          = &match->mask;
2881         flow->rule->match.key           = &match->key;
2882 
2883         match->mask.basic.n_proto = htons(0xffff);
2884 
2885         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2886         case TCP_V4_FLOW:
2887         case UDP_V4_FLOW: {
2888                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2889 
2890                 match->key.basic.n_proto = htons(ETH_P_IP);
2891 
2892                 v4_spec = &fs->h_u.tcp_ip4_spec;
2893                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2894 
2895                 if (v4_m_spec->ip4src) {
2896                         match->key.ipv4.src = v4_spec->ip4src;
2897                         match->mask.ipv4.src = v4_m_spec->ip4src;
2898                 }
2899                 if (v4_m_spec->ip4dst) {
2900                         match->key.ipv4.dst = v4_spec->ip4dst;
2901                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
2902                 }
2903                 if (v4_m_spec->ip4src ||
2904                     v4_m_spec->ip4dst) {
2905                         match->dissector.used_keys |=
2906                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2907                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2908                                 offsetof(struct ethtool_rx_flow_key, ipv4);
2909                 }
2910                 if (v4_m_spec->psrc) {
2911                         match->key.tp.src = v4_spec->psrc;
2912                         match->mask.tp.src = v4_m_spec->psrc;
2913                 }
2914                 if (v4_m_spec->pdst) {
2915                         match->key.tp.dst = v4_spec->pdst;
2916                         match->mask.tp.dst = v4_m_spec->pdst;
2917                 }
2918                 if (v4_m_spec->psrc ||
2919                     v4_m_spec->pdst) {
2920                         match->dissector.used_keys |=
2921                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2922                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2923                                 offsetof(struct ethtool_rx_flow_key, tp);
2924                 }
2925                 if (v4_m_spec->tos) {
2926                         match->key.ip.tos = v4_spec->tos;
2927                         match->mask.ip.tos = v4_m_spec->tos;
2928                         match->dissector.used_keys |=
2929                                 BIT(FLOW_DISSECTOR_KEY_IP);
2930                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2931                                 offsetof(struct ethtool_rx_flow_key, ip);
2932                 }
2933                 }
2934                 break;
2935         case TCP_V6_FLOW:
2936         case UDP_V6_FLOW: {
2937                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2938 
2939                 match->key.basic.n_proto = htons(ETH_P_IPV6);
2940 
2941                 v6_spec = &fs->h_u.tcp_ip6_spec;
2942                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2943                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2944                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2945                                sizeof(match->key.ipv6.src));
2946                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2947                                sizeof(match->mask.ipv6.src));
2948                 }
2949                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2950                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2951                                sizeof(match->key.ipv6.dst));
2952                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2953                                sizeof(match->mask.ipv6.dst));
2954                 }
2955                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2956                     memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2957                         match->dissector.used_keys |=
2958                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2959                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2960                                 offsetof(struct ethtool_rx_flow_key, ipv6);
2961                 }
2962                 if (v6_m_spec->psrc) {
2963                         match->key.tp.src = v6_spec->psrc;
2964                         match->mask.tp.src = v6_m_spec->psrc;
2965                 }
2966                 if (v6_m_spec->pdst) {
2967                         match->key.tp.dst = v6_spec->pdst;
2968                         match->mask.tp.dst = v6_m_spec->pdst;
2969                 }
2970                 if (v6_m_spec->psrc ||
2971                     v6_m_spec->pdst) {
2972                         match->dissector.used_keys |=
2973                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2974                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2975                                 offsetof(struct ethtool_rx_flow_key, tp);
2976                 }
2977                 if (v6_m_spec->tclass) {
2978                         match->key.ip.tos = v6_spec->tclass;
2979                         match->mask.ip.tos = v6_m_spec->tclass;
2980                         match->dissector.used_keys |=
2981                                 BIT(FLOW_DISSECTOR_KEY_IP);
2982                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2983                                 offsetof(struct ethtool_rx_flow_key, ip);
2984                 }
2985                 }
2986                 break;
2987         default:
2988                 ethtool_rx_flow_rule_destroy(flow);
2989                 return ERR_PTR(-EINVAL);
2990         }
2991 
2992         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2993         case TCP_V4_FLOW:
2994         case TCP_V6_FLOW:
2995                 match->key.basic.ip_proto = IPPROTO_TCP;
2996                 break;
2997         case UDP_V4_FLOW:
2998         case UDP_V6_FLOW:
2999                 match->key.basic.ip_proto = IPPROTO_UDP;
3000                 break;
3001         }
3002         match->mask.basic.ip_proto = 0xff;
3003 
3004         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3005         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3006                 offsetof(struct ethtool_rx_flow_key, basic);
3007 
3008         if (fs->flow_type & FLOW_EXT) {
3009                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3010                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3011 
3012                 if (ext_m_spec->vlan_etype) {
3013                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3014                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3015                 }
3016 
3017                 if (ext_m_spec->vlan_tci) {
3018                         match->key.vlan.vlan_id =
3019                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3020                         match->mask.vlan.vlan_id =
3021                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3022 
3023                         match->key.vlan.vlan_dei =
3024                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3025                         match->mask.vlan.vlan_dei =
3026                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3027 
3028                         match->key.vlan.vlan_priority =
3029                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3030                         match->mask.vlan.vlan_priority =
3031                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3032                 }
3033 
3034                 if (ext_m_spec->vlan_etype ||
3035                     ext_m_spec->vlan_tci) {
3036                         match->dissector.used_keys |=
3037                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3038                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3039                                 offsetof(struct ethtool_rx_flow_key, vlan);
3040                 }
3041         }
3042         if (fs->flow_type & FLOW_MAC_EXT) {
3043                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3044                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3045 
3046                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3047                        ETH_ALEN);
3048                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3049                        ETH_ALEN);
3050 
3051                 match->dissector.used_keys |=
3052                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3053                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3054                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3055         }
3056 
3057         act = &flow->rule->action.entries[0];
3058         switch (fs->ring_cookie) {
3059         case RX_CLS_FLOW_DISC:
3060                 act->id = FLOW_ACTION_DROP;
3061                 break;
3062         case RX_CLS_FLOW_WAKE:
3063                 act->id = FLOW_ACTION_WAKE;
3064                 break;
3065         default:
3066                 act->id = FLOW_ACTION_QUEUE;
3067                 if (fs->flow_type & FLOW_RSS)
3068                         act->queue.ctx = input->rss_ctx;
3069 
3070                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3071                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3072                 break;
3073         }
3074 
3075         return flow;
3076 }
3077 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3078 
3079 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3080 {
3081         kfree(flow->rule);
3082         kfree(flow);
3083 }
3084 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3085 

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