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TOMOYO Linux Cross Reference
Linux/net/core/ethtool.c

Version: ~ [ linux-5.0-rc7 ] ~ [ linux-4.20.12 ] ~ [ linux-4.19.25 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.103 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.160 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.176 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.136 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.63 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * net/core/ethtool.c - Ethtool ioctl handler
  3  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
  4  *
  5  * This file is where we call all the ethtool_ops commands to get
  6  * the information ethtool needs.
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License as published by
 10  * the Free Software Foundation; either version 2 of the License, or
 11  * (at your option) any later version.
 12  */
 13 
 14 #include <linux/module.h>
 15 #include <linux/types.h>
 16 #include <linux/capability.h>
 17 #include <linux/errno.h>
 18 #include <linux/ethtool.h>
 19 #include <linux/netdevice.h>
 20 #include <linux/net_tstamp.h>
 21 #include <linux/phy.h>
 22 #include <linux/bitops.h>
 23 #include <linux/uaccess.h>
 24 #include <linux/vmalloc.h>
 25 #include <linux/sfp.h>
 26 #include <linux/slab.h>
 27 #include <linux/rtnetlink.h>
 28 #include <linux/sched/signal.h>
 29 #include <linux/net.h>
 30 #include <net/xdp_sock.h>
 31 
 32 /*
 33  * Some useful ethtool_ops methods that're device independent.
 34  * If we find that all drivers want to do the same thing here,
 35  * we can turn these into dev_() function calls.
 36  */
 37 
 38 u32 ethtool_op_get_link(struct net_device *dev)
 39 {
 40         return netif_carrier_ok(dev) ? 1 : 0;
 41 }
 42 EXPORT_SYMBOL(ethtool_op_get_link);
 43 
 44 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
 45 {
 46         info->so_timestamping =
 47                 SOF_TIMESTAMPING_TX_SOFTWARE |
 48                 SOF_TIMESTAMPING_RX_SOFTWARE |
 49                 SOF_TIMESTAMPING_SOFTWARE;
 50         info->phc_index = -1;
 51         return 0;
 52 }
 53 EXPORT_SYMBOL(ethtool_op_get_ts_info);
 54 
 55 /* Handlers for each ethtool command */
 56 
 57 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
 58 
 59 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
 60         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
 61         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
 62         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
 63         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
 64         [NETIF_F_HIGHDMA_BIT] =          "highdma",
 65         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
 66         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
 67 
 68         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
 69         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
 70         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
 71         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
 72         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
 73         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
 74         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
 75         [NETIF_F_LLTX_BIT] =             "tx-lockless",
 76         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
 77         [NETIF_F_GRO_BIT] =              "rx-gro",
 78         [NETIF_F_GRO_HW_BIT] =           "rx-gro-hw",
 79         [NETIF_F_LRO_BIT] =              "rx-lro",
 80 
 81         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
 82         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
 83         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
 84         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
 85         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
 86         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
 87         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
 88         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
 89         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
 90         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
 91         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
 92         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
 93         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
 94         [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
 95         [NETIF_F_GSO_ESP_BIT] =          "tx-esp-segmentation",
 96         [NETIF_F_GSO_UDP_L4_BIT] =       "tx-udp-segmentation",
 97 
 98         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
 99         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
100         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
101         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
102         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
103         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
104         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
105         [NETIF_F_LOOPBACK_BIT] =         "loopback",
106         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
107         [NETIF_F_RXALL_BIT] =            "rx-all",
108         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
109         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
110         [NETIF_F_HW_ESP_BIT] =           "esp-hw-offload",
111         [NETIF_F_HW_ESP_TX_CSUM_BIT] =   "esp-tx-csum-hw-offload",
112         [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] =       "rx-udp_tunnel-port-offload",
113         [NETIF_F_HW_TLS_RECORD_BIT] =   "tls-hw-record",
114         [NETIF_F_HW_TLS_TX_BIT] =        "tls-hw-tx-offload",
115         [NETIF_F_HW_TLS_RX_BIT] =        "tls-hw-rx-offload",
116 };
117 
118 static const char
119 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
120         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
121         [ETH_RSS_HASH_XOR_BIT] =        "xor",
122         [ETH_RSS_HASH_CRC32_BIT] =      "crc32",
123 };
124 
125 static const char
126 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
127         [ETHTOOL_ID_UNSPEC]     = "Unspec",
128         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
129         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
130         [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
131 };
132 
133 static const char
134 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
135         [ETHTOOL_ID_UNSPEC]     = "Unspec",
136         [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
137 };
138 
139 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
140 {
141         struct ethtool_gfeatures cmd = {
142                 .cmd = ETHTOOL_GFEATURES,
143                 .size = ETHTOOL_DEV_FEATURE_WORDS,
144         };
145         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
146         u32 __user *sizeaddr;
147         u32 copy_size;
148         int i;
149 
150         /* in case feature bits run out again */
151         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
152 
153         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
154                 features[i].available = (u32)(dev->hw_features >> (32 * i));
155                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
156                 features[i].active = (u32)(dev->features >> (32 * i));
157                 features[i].never_changed =
158                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
159         }
160 
161         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
162         if (get_user(copy_size, sizeaddr))
163                 return -EFAULT;
164 
165         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
166                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
167 
168         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
169                 return -EFAULT;
170         useraddr += sizeof(cmd);
171         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
172                 return -EFAULT;
173 
174         return 0;
175 }
176 
177 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
178 {
179         struct ethtool_sfeatures cmd;
180         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
181         netdev_features_t wanted = 0, valid = 0;
182         int i, ret = 0;
183 
184         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
185                 return -EFAULT;
186         useraddr += sizeof(cmd);
187 
188         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
189                 return -EINVAL;
190 
191         if (copy_from_user(features, useraddr, sizeof(features)))
192                 return -EFAULT;
193 
194         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
195                 valid |= (netdev_features_t)features[i].valid << (32 * i);
196                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
197         }
198 
199         if (valid & ~NETIF_F_ETHTOOL_BITS)
200                 return -EINVAL;
201 
202         if (valid & ~dev->hw_features) {
203                 valid &= dev->hw_features;
204                 ret |= ETHTOOL_F_UNSUPPORTED;
205         }
206 
207         dev->wanted_features &= ~valid;
208         dev->wanted_features |= wanted & valid;
209         __netdev_update_features(dev);
210 
211         if ((dev->wanted_features ^ dev->features) & valid)
212                 ret |= ETHTOOL_F_WISH;
213 
214         return ret;
215 }
216 
217 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
218 {
219         const struct ethtool_ops *ops = dev->ethtool_ops;
220 
221         if (sset == ETH_SS_FEATURES)
222                 return ARRAY_SIZE(netdev_features_strings);
223 
224         if (sset == ETH_SS_RSS_HASH_FUNCS)
225                 return ARRAY_SIZE(rss_hash_func_strings);
226 
227         if (sset == ETH_SS_TUNABLES)
228                 return ARRAY_SIZE(tunable_strings);
229 
230         if (sset == ETH_SS_PHY_TUNABLES)
231                 return ARRAY_SIZE(phy_tunable_strings);
232 
233         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
234             !ops->get_ethtool_phy_stats)
235                 return phy_ethtool_get_sset_count(dev->phydev);
236 
237         if (ops->get_sset_count && ops->get_strings)
238                 return ops->get_sset_count(dev, sset);
239         else
240                 return -EOPNOTSUPP;
241 }
242 
243 static void __ethtool_get_strings(struct net_device *dev,
244         u32 stringset, u8 *data)
245 {
246         const struct ethtool_ops *ops = dev->ethtool_ops;
247 
248         if (stringset == ETH_SS_FEATURES)
249                 memcpy(data, netdev_features_strings,
250                         sizeof(netdev_features_strings));
251         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
252                 memcpy(data, rss_hash_func_strings,
253                        sizeof(rss_hash_func_strings));
254         else if (stringset == ETH_SS_TUNABLES)
255                 memcpy(data, tunable_strings, sizeof(tunable_strings));
256         else if (stringset == ETH_SS_PHY_TUNABLES)
257                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
258         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
259                  !ops->get_ethtool_phy_stats)
260                 phy_ethtool_get_strings(dev->phydev, data);
261         else
262                 /* ops->get_strings is valid because checked earlier */
263                 ops->get_strings(dev, stringset, data);
264 }
265 
266 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
267 {
268         /* feature masks of legacy discrete ethtool ops */
269 
270         switch (eth_cmd) {
271         case ETHTOOL_GTXCSUM:
272         case ETHTOOL_STXCSUM:
273                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
274         case ETHTOOL_GRXCSUM:
275         case ETHTOOL_SRXCSUM:
276                 return NETIF_F_RXCSUM;
277         case ETHTOOL_GSG:
278         case ETHTOOL_SSG:
279                 return NETIF_F_SG;
280         case ETHTOOL_GTSO:
281         case ETHTOOL_STSO:
282                 return NETIF_F_ALL_TSO;
283         case ETHTOOL_GGSO:
284         case ETHTOOL_SGSO:
285                 return NETIF_F_GSO;
286         case ETHTOOL_GGRO:
287         case ETHTOOL_SGRO:
288                 return NETIF_F_GRO;
289         default:
290                 BUG();
291         }
292 }
293 
294 static int ethtool_get_one_feature(struct net_device *dev,
295         char __user *useraddr, u32 ethcmd)
296 {
297         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
298         struct ethtool_value edata = {
299                 .cmd = ethcmd,
300                 .data = !!(dev->features & mask),
301         };
302 
303         if (copy_to_user(useraddr, &edata, sizeof(edata)))
304                 return -EFAULT;
305         return 0;
306 }
307 
308 static int ethtool_set_one_feature(struct net_device *dev,
309         void __user *useraddr, u32 ethcmd)
310 {
311         struct ethtool_value edata;
312         netdev_features_t mask;
313 
314         if (copy_from_user(&edata, useraddr, sizeof(edata)))
315                 return -EFAULT;
316 
317         mask = ethtool_get_feature_mask(ethcmd);
318         mask &= dev->hw_features;
319         if (!mask)
320                 return -EOPNOTSUPP;
321 
322         if (edata.data)
323                 dev->wanted_features |= mask;
324         else
325                 dev->wanted_features &= ~mask;
326 
327         __netdev_update_features(dev);
328 
329         return 0;
330 }
331 
332 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
333                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
334 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
335                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
336                           NETIF_F_RXHASH)
337 
338 static u32 __ethtool_get_flags(struct net_device *dev)
339 {
340         u32 flags = 0;
341 
342         if (dev->features & NETIF_F_LRO)
343                 flags |= ETH_FLAG_LRO;
344         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
345                 flags |= ETH_FLAG_RXVLAN;
346         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
347                 flags |= ETH_FLAG_TXVLAN;
348         if (dev->features & NETIF_F_NTUPLE)
349                 flags |= ETH_FLAG_NTUPLE;
350         if (dev->features & NETIF_F_RXHASH)
351                 flags |= ETH_FLAG_RXHASH;
352 
353         return flags;
354 }
355 
356 static int __ethtool_set_flags(struct net_device *dev, u32 data)
357 {
358         netdev_features_t features = 0, changed;
359 
360         if (data & ~ETH_ALL_FLAGS)
361                 return -EINVAL;
362 
363         if (data & ETH_FLAG_LRO)
364                 features |= NETIF_F_LRO;
365         if (data & ETH_FLAG_RXVLAN)
366                 features |= NETIF_F_HW_VLAN_CTAG_RX;
367         if (data & ETH_FLAG_TXVLAN)
368                 features |= NETIF_F_HW_VLAN_CTAG_TX;
369         if (data & ETH_FLAG_NTUPLE)
370                 features |= NETIF_F_NTUPLE;
371         if (data & ETH_FLAG_RXHASH)
372                 features |= NETIF_F_RXHASH;
373 
374         /* allow changing only bits set in hw_features */
375         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
376         if (changed & ~dev->hw_features)
377                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
378 
379         dev->wanted_features =
380                 (dev->wanted_features & ~changed) | (features & changed);
381 
382         __netdev_update_features(dev);
383 
384         return 0;
385 }
386 
387 /* Given two link masks, AND them together and save the result in dst. */
388 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
389                                   struct ethtool_link_ksettings *src)
390 {
391         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
392         unsigned int idx = 0;
393 
394         for (; idx < size; idx++) {
395                 dst->link_modes.supported[idx] &=
396                         src->link_modes.supported[idx];
397                 dst->link_modes.advertising[idx] &=
398                         src->link_modes.advertising[idx];
399         }
400 }
401 EXPORT_SYMBOL(ethtool_intersect_link_masks);
402 
403 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
404                                              u32 legacy_u32)
405 {
406         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
407         dst[0] = legacy_u32;
408 }
409 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
410 
411 /* return false if src had higher bits set. lower bits always updated. */
412 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
413                                              const unsigned long *src)
414 {
415         bool retval = true;
416 
417         /* TODO: following test will soon always be true */
418         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
419                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
420 
421                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
422                 bitmap_fill(ext, 32);
423                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
424                 if (bitmap_intersects(ext, src,
425                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
426                         /* src mask goes beyond bit 31 */
427                         retval = false;
428                 }
429         }
430         *legacy_u32 = src[0];
431         return retval;
432 }
433 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
434 
435 /* return false if legacy contained non-0 deprecated fields
436  * maxtxpkt/maxrxpkt. rest of ksettings always updated
437  */
438 static bool
439 convert_legacy_settings_to_link_ksettings(
440         struct ethtool_link_ksettings *link_ksettings,
441         const struct ethtool_cmd *legacy_settings)
442 {
443         bool retval = true;
444 
445         memset(link_ksettings, 0, sizeof(*link_ksettings));
446 
447         /* This is used to tell users that driver is still using these
448          * deprecated legacy fields, and they should not use
449          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
450          */
451         if (legacy_settings->maxtxpkt ||
452             legacy_settings->maxrxpkt)
453                 retval = false;
454 
455         ethtool_convert_legacy_u32_to_link_mode(
456                 link_ksettings->link_modes.supported,
457                 legacy_settings->supported);
458         ethtool_convert_legacy_u32_to_link_mode(
459                 link_ksettings->link_modes.advertising,
460                 legacy_settings->advertising);
461         ethtool_convert_legacy_u32_to_link_mode(
462                 link_ksettings->link_modes.lp_advertising,
463                 legacy_settings->lp_advertising);
464         link_ksettings->base.speed
465                 = ethtool_cmd_speed(legacy_settings);
466         link_ksettings->base.duplex
467                 = legacy_settings->duplex;
468         link_ksettings->base.port
469                 = legacy_settings->port;
470         link_ksettings->base.phy_address
471                 = legacy_settings->phy_address;
472         link_ksettings->base.autoneg
473                 = legacy_settings->autoneg;
474         link_ksettings->base.mdio_support
475                 = legacy_settings->mdio_support;
476         link_ksettings->base.eth_tp_mdix
477                 = legacy_settings->eth_tp_mdix;
478         link_ksettings->base.eth_tp_mdix_ctrl
479                 = legacy_settings->eth_tp_mdix_ctrl;
480         return retval;
481 }
482 
483 /* return false if ksettings link modes had higher bits
484  * set. legacy_settings always updated (best effort)
485  */
486 static bool
487 convert_link_ksettings_to_legacy_settings(
488         struct ethtool_cmd *legacy_settings,
489         const struct ethtool_link_ksettings *link_ksettings)
490 {
491         bool retval = true;
492 
493         memset(legacy_settings, 0, sizeof(*legacy_settings));
494         /* this also clears the deprecated fields in legacy structure:
495          * __u8         transceiver;
496          * __u32        maxtxpkt;
497          * __u32        maxrxpkt;
498          */
499 
500         retval &= ethtool_convert_link_mode_to_legacy_u32(
501                 &legacy_settings->supported,
502                 link_ksettings->link_modes.supported);
503         retval &= ethtool_convert_link_mode_to_legacy_u32(
504                 &legacy_settings->advertising,
505                 link_ksettings->link_modes.advertising);
506         retval &= ethtool_convert_link_mode_to_legacy_u32(
507                 &legacy_settings->lp_advertising,
508                 link_ksettings->link_modes.lp_advertising);
509         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
510         legacy_settings->duplex
511                 = link_ksettings->base.duplex;
512         legacy_settings->port
513                 = link_ksettings->base.port;
514         legacy_settings->phy_address
515                 = link_ksettings->base.phy_address;
516         legacy_settings->autoneg
517                 = link_ksettings->base.autoneg;
518         legacy_settings->mdio_support
519                 = link_ksettings->base.mdio_support;
520         legacy_settings->eth_tp_mdix
521                 = link_ksettings->base.eth_tp_mdix;
522         legacy_settings->eth_tp_mdix_ctrl
523                 = link_ksettings->base.eth_tp_mdix_ctrl;
524         legacy_settings->transceiver
525                 = link_ksettings->base.transceiver;
526         return retval;
527 }
528 
529 /* number of 32-bit words to store the user's link mode bitmaps */
530 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
531         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
532 
533 /* layout of the struct passed from/to userland */
534 struct ethtool_link_usettings {
535         struct ethtool_link_settings base;
536         struct {
537                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
538                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
539                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
540         } link_modes;
541 };
542 
543 /* Internal kernel helper to query a device ethtool_link_settings. */
544 int __ethtool_get_link_ksettings(struct net_device *dev,
545                                  struct ethtool_link_ksettings *link_ksettings)
546 {
547         ASSERT_RTNL();
548 
549         if (!dev->ethtool_ops->get_link_ksettings)
550                 return -EOPNOTSUPP;
551 
552         memset(link_ksettings, 0, sizeof(*link_ksettings));
553         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
554 }
555 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
556 
557 /* convert ethtool_link_usettings in user space to a kernel internal
558  * ethtool_link_ksettings. return 0 on success, errno on error.
559  */
560 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
561                                          const void __user *from)
562 {
563         struct ethtool_link_usettings link_usettings;
564 
565         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
566                 return -EFAULT;
567 
568         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
569         bitmap_from_arr32(to->link_modes.supported,
570                           link_usettings.link_modes.supported,
571                           __ETHTOOL_LINK_MODE_MASK_NBITS);
572         bitmap_from_arr32(to->link_modes.advertising,
573                           link_usettings.link_modes.advertising,
574                           __ETHTOOL_LINK_MODE_MASK_NBITS);
575         bitmap_from_arr32(to->link_modes.lp_advertising,
576                           link_usettings.link_modes.lp_advertising,
577                           __ETHTOOL_LINK_MODE_MASK_NBITS);
578 
579         return 0;
580 }
581 
582 /* convert a kernel internal ethtool_link_ksettings to
583  * ethtool_link_usettings in user space. return 0 on success, errno on
584  * error.
585  */
586 static int
587 store_link_ksettings_for_user(void __user *to,
588                               const struct ethtool_link_ksettings *from)
589 {
590         struct ethtool_link_usettings link_usettings;
591 
592         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
593         bitmap_to_arr32(link_usettings.link_modes.supported,
594                         from->link_modes.supported,
595                         __ETHTOOL_LINK_MODE_MASK_NBITS);
596         bitmap_to_arr32(link_usettings.link_modes.advertising,
597                         from->link_modes.advertising,
598                         __ETHTOOL_LINK_MODE_MASK_NBITS);
599         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
600                         from->link_modes.lp_advertising,
601                         __ETHTOOL_LINK_MODE_MASK_NBITS);
602 
603         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
604                 return -EFAULT;
605 
606         return 0;
607 }
608 
609 /* Query device for its ethtool_link_settings. */
610 static int ethtool_get_link_ksettings(struct net_device *dev,
611                                       void __user *useraddr)
612 {
613         int err = 0;
614         struct ethtool_link_ksettings link_ksettings;
615 
616         ASSERT_RTNL();
617         if (!dev->ethtool_ops->get_link_ksettings)
618                 return -EOPNOTSUPP;
619 
620         /* handle bitmap nbits handshake */
621         if (copy_from_user(&link_ksettings.base, useraddr,
622                            sizeof(link_ksettings.base)))
623                 return -EFAULT;
624 
625         if (__ETHTOOL_LINK_MODE_MASK_NU32
626             != link_ksettings.base.link_mode_masks_nwords) {
627                 /* wrong link mode nbits requested */
628                 memset(&link_ksettings, 0, sizeof(link_ksettings));
629                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
630                 /* send back number of words required as negative val */
631                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
632                                    "need too many bits for link modes!");
633                 link_ksettings.base.link_mode_masks_nwords
634                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
635 
636                 /* copy the base fields back to user, not the link
637                  * mode bitmaps
638                  */
639                 if (copy_to_user(useraddr, &link_ksettings.base,
640                                  sizeof(link_ksettings.base)))
641                         return -EFAULT;
642 
643                 return 0;
644         }
645 
646         /* handshake successful: user/kernel agree on
647          * link_mode_masks_nwords
648          */
649 
650         memset(&link_ksettings, 0, sizeof(link_ksettings));
651         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
652         if (err < 0)
653                 return err;
654 
655         /* make sure we tell the right values to user */
656         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
657         link_ksettings.base.link_mode_masks_nwords
658                 = __ETHTOOL_LINK_MODE_MASK_NU32;
659 
660         return store_link_ksettings_for_user(useraddr, &link_ksettings);
661 }
662 
663 /* Update device ethtool_link_settings. */
664 static int ethtool_set_link_ksettings(struct net_device *dev,
665                                       void __user *useraddr)
666 {
667         int err;
668         struct ethtool_link_ksettings link_ksettings;
669 
670         ASSERT_RTNL();
671 
672         if (!dev->ethtool_ops->set_link_ksettings)
673                 return -EOPNOTSUPP;
674 
675         /* make sure nbits field has expected value */
676         if (copy_from_user(&link_ksettings.base, useraddr,
677                            sizeof(link_ksettings.base)))
678                 return -EFAULT;
679 
680         if (__ETHTOOL_LINK_MODE_MASK_NU32
681             != link_ksettings.base.link_mode_masks_nwords)
682                 return -EINVAL;
683 
684         /* copy the whole structure, now that we know it has expected
685          * format
686          */
687         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
688         if (err)
689                 return err;
690 
691         /* re-check nwords field, just in case */
692         if (__ETHTOOL_LINK_MODE_MASK_NU32
693             != link_ksettings.base.link_mode_masks_nwords)
694                 return -EINVAL;
695 
696         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
697 }
698 
699 /* Query device for its ethtool_cmd settings.
700  *
701  * Backward compatibility note: for compatibility with legacy ethtool, this is
702  * now implemented via get_link_ksettings. When driver reports higher link mode
703  * bits, a kernel warning is logged once (with name of 1st driver/device) to
704  * recommend user to upgrade ethtool, but the command is successful (only the
705  * lower link mode bits reported back to user). Deprecated fields from
706  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
707  */
708 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
709 {
710         struct ethtool_link_ksettings link_ksettings;
711         struct ethtool_cmd cmd;
712         int err;
713 
714         ASSERT_RTNL();
715         if (!dev->ethtool_ops->get_link_ksettings)
716                 return -EOPNOTSUPP;
717 
718         memset(&link_ksettings, 0, sizeof(link_ksettings));
719         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
720         if (err < 0)
721                 return err;
722         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
723 
724         /* send a sensible cmd tag back to user */
725         cmd.cmd = ETHTOOL_GSET;
726 
727         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
728                 return -EFAULT;
729 
730         return 0;
731 }
732 
733 /* Update device link settings with given ethtool_cmd.
734  *
735  * Backward compatibility note: for compatibility with legacy ethtool, this is
736  * now always implemented via set_link_settings. When user's request updates
737  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
738  * warning is logged once (with name of 1st driver/device) to recommend user to
739  * upgrade ethtool, and the request is rejected.
740  */
741 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
742 {
743         struct ethtool_link_ksettings link_ksettings;
744         struct ethtool_cmd cmd;
745 
746         ASSERT_RTNL();
747 
748         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
749                 return -EFAULT;
750         if (!dev->ethtool_ops->set_link_ksettings)
751                 return -EOPNOTSUPP;
752 
753         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
754                 return -EINVAL;
755         link_ksettings.base.link_mode_masks_nwords =
756                 __ETHTOOL_LINK_MODE_MASK_NU32;
757         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
758 }
759 
760 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
761                                                   void __user *useraddr)
762 {
763         struct ethtool_drvinfo info;
764         const struct ethtool_ops *ops = dev->ethtool_ops;
765 
766         memset(&info, 0, sizeof(info));
767         info.cmd = ETHTOOL_GDRVINFO;
768         if (ops->get_drvinfo) {
769                 ops->get_drvinfo(dev, &info);
770         } else if (dev->dev.parent && dev->dev.parent->driver) {
771                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
772                         sizeof(info.bus_info));
773                 strlcpy(info.driver, dev->dev.parent->driver->name,
774                         sizeof(info.driver));
775         } else {
776                 return -EOPNOTSUPP;
777         }
778 
779         /*
780          * this method of obtaining string set info is deprecated;
781          * Use ETHTOOL_GSSET_INFO instead.
782          */
783         if (ops->get_sset_count) {
784                 int rc;
785 
786                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
787                 if (rc >= 0)
788                         info.testinfo_len = rc;
789                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
790                 if (rc >= 0)
791                         info.n_stats = rc;
792                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
793                 if (rc >= 0)
794                         info.n_priv_flags = rc;
795         }
796         if (ops->get_regs_len) {
797                 int ret = ops->get_regs_len(dev);
798 
799                 if (ret > 0)
800                         info.regdump_len = ret;
801         }
802 
803         if (ops->get_eeprom_len)
804                 info.eedump_len = ops->get_eeprom_len(dev);
805 
806         if (copy_to_user(useraddr, &info, sizeof(info)))
807                 return -EFAULT;
808         return 0;
809 }
810 
811 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
812                                                     void __user *useraddr)
813 {
814         struct ethtool_sset_info info;
815         u64 sset_mask;
816         int i, idx = 0, n_bits = 0, ret, rc;
817         u32 *info_buf = NULL;
818 
819         if (copy_from_user(&info, useraddr, sizeof(info)))
820                 return -EFAULT;
821 
822         /* store copy of mask, because we zero struct later on */
823         sset_mask = info.sset_mask;
824         if (!sset_mask)
825                 return 0;
826 
827         /* calculate size of return buffer */
828         n_bits = hweight64(sset_mask);
829 
830         memset(&info, 0, sizeof(info));
831         info.cmd = ETHTOOL_GSSET_INFO;
832 
833         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
834         if (!info_buf)
835                 return -ENOMEM;
836 
837         /*
838          * fill return buffer based on input bitmask and successful
839          * get_sset_count return
840          */
841         for (i = 0; i < 64; i++) {
842                 if (!(sset_mask & (1ULL << i)))
843                         continue;
844 
845                 rc = __ethtool_get_sset_count(dev, i);
846                 if (rc >= 0) {
847                         info.sset_mask |= (1ULL << i);
848                         info_buf[idx++] = rc;
849                 }
850         }
851 
852         ret = -EFAULT;
853         if (copy_to_user(useraddr, &info, sizeof(info)))
854                 goto out;
855 
856         useraddr += offsetof(struct ethtool_sset_info, data);
857         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
858                 goto out;
859 
860         ret = 0;
861 
862 out:
863         kfree(info_buf);
864         return ret;
865 }
866 
867 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
868                                                 u32 cmd, void __user *useraddr)
869 {
870         struct ethtool_rxnfc info;
871         size_t info_size = sizeof(info);
872         int rc;
873 
874         if (!dev->ethtool_ops->set_rxnfc)
875                 return -EOPNOTSUPP;
876 
877         /* struct ethtool_rxnfc was originally defined for
878          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
879          * members.  User-space might still be using that
880          * definition. */
881         if (cmd == ETHTOOL_SRXFH)
882                 info_size = (offsetof(struct ethtool_rxnfc, data) +
883                              sizeof(info.data));
884 
885         if (copy_from_user(&info, useraddr, info_size))
886                 return -EFAULT;
887 
888         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
889         if (rc)
890                 return rc;
891 
892         if (cmd == ETHTOOL_SRXCLSRLINS &&
893             copy_to_user(useraddr, &info, info_size))
894                 return -EFAULT;
895 
896         return 0;
897 }
898 
899 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
900                                                 u32 cmd, void __user *useraddr)
901 {
902         struct ethtool_rxnfc info;
903         size_t info_size = sizeof(info);
904         const struct ethtool_ops *ops = dev->ethtool_ops;
905         int ret;
906         void *rule_buf = NULL;
907 
908         if (!ops->get_rxnfc)
909                 return -EOPNOTSUPP;
910 
911         /* struct ethtool_rxnfc was originally defined for
912          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
913          * members.  User-space might still be using that
914          * definition. */
915         if (cmd == ETHTOOL_GRXFH)
916                 info_size = (offsetof(struct ethtool_rxnfc, data) +
917                              sizeof(info.data));
918 
919         if (copy_from_user(&info, useraddr, info_size))
920                 return -EFAULT;
921 
922         /* If FLOW_RSS was requested then user-space must be using the
923          * new definition, as FLOW_RSS is newer.
924          */
925         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
926                 info_size = sizeof(info);
927                 if (copy_from_user(&info, useraddr, info_size))
928                         return -EFAULT;
929                 /* Since malicious users may modify the original data,
930                  * we need to check whether FLOW_RSS is still requested.
931                  */
932                 if (!(info.flow_type & FLOW_RSS))
933                         return -EINVAL;
934         }
935 
936         if (info.cmd != cmd)
937                 return -EINVAL;
938 
939         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
940                 if (info.rule_cnt > 0) {
941                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
942                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
943                                                    GFP_USER);
944                         if (!rule_buf)
945                                 return -ENOMEM;
946                 }
947         }
948 
949         ret = ops->get_rxnfc(dev, &info, rule_buf);
950         if (ret < 0)
951                 goto err_out;
952 
953         ret = -EFAULT;
954         if (copy_to_user(useraddr, &info, info_size))
955                 goto err_out;
956 
957         if (rule_buf) {
958                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
959                 if (copy_to_user(useraddr, rule_buf,
960                                  info.rule_cnt * sizeof(u32)))
961                         goto err_out;
962         }
963         ret = 0;
964 
965 err_out:
966         kfree(rule_buf);
967 
968         return ret;
969 }
970 
971 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
972                                         struct ethtool_rxnfc *rx_rings,
973                                         u32 size)
974 {
975         int i;
976 
977         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
978                 return -EFAULT;
979 
980         /* Validate ring indices */
981         for (i = 0; i < size; i++)
982                 if (indir[i] >= rx_rings->data)
983                         return -EINVAL;
984 
985         return 0;
986 }
987 
988 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
989 
990 void netdev_rss_key_fill(void *buffer, size_t len)
991 {
992         BUG_ON(len > sizeof(netdev_rss_key));
993         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
994         memcpy(buffer, netdev_rss_key, len);
995 }
996 EXPORT_SYMBOL(netdev_rss_key_fill);
997 
998 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
999 {
1000         u32 dev_size, current_max = 0;
1001         u32 *indir;
1002         int ret;
1003 
1004         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1005             !dev->ethtool_ops->get_rxfh)
1006                 return -EOPNOTSUPP;
1007         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1008         if (dev_size == 0)
1009                 return -EOPNOTSUPP;
1010 
1011         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1012         if (!indir)
1013                 return -ENOMEM;
1014 
1015         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1016         if (ret)
1017                 goto out;
1018 
1019         while (dev_size--)
1020                 current_max = max(current_max, indir[dev_size]);
1021 
1022         *max = current_max;
1023 
1024 out:
1025         kfree(indir);
1026         return ret;
1027 }
1028 
1029 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1030                                                      void __user *useraddr)
1031 {
1032         u32 user_size, dev_size;
1033         u32 *indir;
1034         int ret;
1035 
1036         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1037             !dev->ethtool_ops->get_rxfh)
1038                 return -EOPNOTSUPP;
1039         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1040         if (dev_size == 0)
1041                 return -EOPNOTSUPP;
1042 
1043         if (copy_from_user(&user_size,
1044                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1045                            sizeof(user_size)))
1046                 return -EFAULT;
1047 
1048         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1049                          &dev_size, sizeof(dev_size)))
1050                 return -EFAULT;
1051 
1052         /* If the user buffer size is 0, this is just a query for the
1053          * device table size.  Otherwise, if it's smaller than the
1054          * device table size it's an error.
1055          */
1056         if (user_size < dev_size)
1057                 return user_size == 0 ? 0 : -EINVAL;
1058 
1059         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1060         if (!indir)
1061                 return -ENOMEM;
1062 
1063         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1064         if (ret)
1065                 goto out;
1066 
1067         if (copy_to_user(useraddr +
1068                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1069                          indir, dev_size * sizeof(indir[0])))
1070                 ret = -EFAULT;
1071 
1072 out:
1073         kfree(indir);
1074         return ret;
1075 }
1076 
1077 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1078                                                      void __user *useraddr)
1079 {
1080         struct ethtool_rxnfc rx_rings;
1081         u32 user_size, dev_size, i;
1082         u32 *indir;
1083         const struct ethtool_ops *ops = dev->ethtool_ops;
1084         int ret;
1085         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1086 
1087         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1088             !ops->get_rxnfc)
1089                 return -EOPNOTSUPP;
1090 
1091         dev_size = ops->get_rxfh_indir_size(dev);
1092         if (dev_size == 0)
1093                 return -EOPNOTSUPP;
1094 
1095         if (copy_from_user(&user_size,
1096                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1097                            sizeof(user_size)))
1098                 return -EFAULT;
1099 
1100         if (user_size != 0 && user_size != dev_size)
1101                 return -EINVAL;
1102 
1103         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1104         if (!indir)
1105                 return -ENOMEM;
1106 
1107         rx_rings.cmd = ETHTOOL_GRXRINGS;
1108         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1109         if (ret)
1110                 goto out;
1111 
1112         if (user_size == 0) {
1113                 for (i = 0; i < dev_size; i++)
1114                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1115         } else {
1116                 ret = ethtool_copy_validate_indir(indir,
1117                                                   useraddr + ringidx_offset,
1118                                                   &rx_rings,
1119                                                   dev_size);
1120                 if (ret)
1121                         goto out;
1122         }
1123 
1124         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1125         if (ret)
1126                 goto out;
1127 
1128         /* indicate whether rxfh was set to default */
1129         if (user_size == 0)
1130                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1131         else
1132                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1133 
1134 out:
1135         kfree(indir);
1136         return ret;
1137 }
1138 
1139 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1140                                                void __user *useraddr)
1141 {
1142         int ret;
1143         const struct ethtool_ops *ops = dev->ethtool_ops;
1144         u32 user_indir_size, user_key_size;
1145         u32 dev_indir_size = 0, dev_key_size = 0;
1146         struct ethtool_rxfh rxfh;
1147         u32 total_size;
1148         u32 indir_bytes;
1149         u32 *indir = NULL;
1150         u8 dev_hfunc = 0;
1151         u8 *hkey = NULL;
1152         u8 *rss_config;
1153 
1154         if (!ops->get_rxfh)
1155                 return -EOPNOTSUPP;
1156 
1157         if (ops->get_rxfh_indir_size)
1158                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1159         if (ops->get_rxfh_key_size)
1160                 dev_key_size = ops->get_rxfh_key_size(dev);
1161 
1162         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1163                 return -EFAULT;
1164         user_indir_size = rxfh.indir_size;
1165         user_key_size = rxfh.key_size;
1166 
1167         /* Check that reserved fields are 0 for now */
1168         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1169                 return -EINVAL;
1170         /* Most drivers don't handle rss_context, check it's 0 as well */
1171         if (rxfh.rss_context && !ops->get_rxfh_context)
1172                 return -EOPNOTSUPP;
1173 
1174         rxfh.indir_size = dev_indir_size;
1175         rxfh.key_size = dev_key_size;
1176         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1177                 return -EFAULT;
1178 
1179         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1180             (user_key_size && (user_key_size != dev_key_size)))
1181                 return -EINVAL;
1182 
1183         indir_bytes = user_indir_size * sizeof(indir[0]);
1184         total_size = indir_bytes + user_key_size;
1185         rss_config = kzalloc(total_size, GFP_USER);
1186         if (!rss_config)
1187                 return -ENOMEM;
1188 
1189         if (user_indir_size)
1190                 indir = (u32 *)rss_config;
1191 
1192         if (user_key_size)
1193                 hkey = rss_config + indir_bytes;
1194 
1195         if (rxfh.rss_context)
1196                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1197                                                          &dev_hfunc,
1198                                                          rxfh.rss_context);
1199         else
1200                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1201         if (ret)
1202                 goto out;
1203 
1204         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1205                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1206                 ret = -EFAULT;
1207         } else if (copy_to_user(useraddr +
1208                               offsetof(struct ethtool_rxfh, rss_config[0]),
1209                               rss_config, total_size)) {
1210                 ret = -EFAULT;
1211         }
1212 out:
1213         kfree(rss_config);
1214 
1215         return ret;
1216 }
1217 
1218 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1219                                                void __user *useraddr)
1220 {
1221         int ret;
1222         const struct ethtool_ops *ops = dev->ethtool_ops;
1223         struct ethtool_rxnfc rx_rings;
1224         struct ethtool_rxfh rxfh;
1225         u32 dev_indir_size = 0, dev_key_size = 0, i;
1226         u32 *indir = NULL, indir_bytes = 0;
1227         u8 *hkey = NULL;
1228         u8 *rss_config;
1229         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1230         bool delete = false;
1231 
1232         if (!ops->get_rxnfc || !ops->set_rxfh)
1233                 return -EOPNOTSUPP;
1234 
1235         if (ops->get_rxfh_indir_size)
1236                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1237         if (ops->get_rxfh_key_size)
1238                 dev_key_size = ops->get_rxfh_key_size(dev);
1239 
1240         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1241                 return -EFAULT;
1242 
1243         /* Check that reserved fields are 0 for now */
1244         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1245                 return -EINVAL;
1246         /* Most drivers don't handle rss_context, check it's 0 as well */
1247         if (rxfh.rss_context && !ops->set_rxfh_context)
1248                 return -EOPNOTSUPP;
1249 
1250         /* If either indir, hash key or function is valid, proceed further.
1251          * Must request at least one change: indir size, hash key or function.
1252          */
1253         if ((rxfh.indir_size &&
1254              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1255              rxfh.indir_size != dev_indir_size) ||
1256             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1257             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1258              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1259                 return -EINVAL;
1260 
1261         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1262                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1263 
1264         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1265         if (!rss_config)
1266                 return -ENOMEM;
1267 
1268         rx_rings.cmd = ETHTOOL_GRXRINGS;
1269         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1270         if (ret)
1271                 goto out;
1272 
1273         /* rxfh.indir_size == 0 means reset the indir table to default (master
1274          * context) or delete the context (other RSS contexts).
1275          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1276          */
1277         if (rxfh.indir_size &&
1278             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1279                 indir = (u32 *)rss_config;
1280                 ret = ethtool_copy_validate_indir(indir,
1281                                                   useraddr + rss_cfg_offset,
1282                                                   &rx_rings,
1283                                                   rxfh.indir_size);
1284                 if (ret)
1285                         goto out;
1286         } else if (rxfh.indir_size == 0) {
1287                 if (rxfh.rss_context == 0) {
1288                         indir = (u32 *)rss_config;
1289                         for (i = 0; i < dev_indir_size; i++)
1290                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1291                 } else {
1292                         delete = true;
1293                 }
1294         }
1295 
1296         if (rxfh.key_size) {
1297                 hkey = rss_config + indir_bytes;
1298                 if (copy_from_user(hkey,
1299                                    useraddr + rss_cfg_offset + indir_bytes,
1300                                    rxfh.key_size)) {
1301                         ret = -EFAULT;
1302                         goto out;
1303                 }
1304         }
1305 
1306         if (rxfh.rss_context)
1307                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1308                                             &rxfh.rss_context, delete);
1309         else
1310                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1311         if (ret)
1312                 goto out;
1313 
1314         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1315                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1316                 ret = -EFAULT;
1317 
1318         if (!rxfh.rss_context) {
1319                 /* indicate whether rxfh was set to default */
1320                 if (rxfh.indir_size == 0)
1321                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1322                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1323                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1324         }
1325 
1326 out:
1327         kfree(rss_config);
1328         return ret;
1329 }
1330 
1331 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1332 {
1333         struct ethtool_regs regs;
1334         const struct ethtool_ops *ops = dev->ethtool_ops;
1335         void *regbuf;
1336         int reglen, ret;
1337 
1338         if (!ops->get_regs || !ops->get_regs_len)
1339                 return -EOPNOTSUPP;
1340 
1341         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1342                 return -EFAULT;
1343 
1344         reglen = ops->get_regs_len(dev);
1345         if (reglen <= 0)
1346                 return reglen;
1347 
1348         if (regs.len > reglen)
1349                 regs.len = reglen;
1350 
1351         regbuf = NULL;
1352         if (reglen) {
1353                 regbuf = vzalloc(reglen);
1354                 if (!regbuf)
1355                         return -ENOMEM;
1356         }
1357 
1358         ops->get_regs(dev, &regs, regbuf);
1359 
1360         ret = -EFAULT;
1361         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1362                 goto out;
1363         useraddr += offsetof(struct ethtool_regs, data);
1364         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1365                 goto out;
1366         ret = 0;
1367 
1368  out:
1369         vfree(regbuf);
1370         return ret;
1371 }
1372 
1373 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1374 {
1375         struct ethtool_value reset;
1376         int ret;
1377 
1378         if (!dev->ethtool_ops->reset)
1379                 return -EOPNOTSUPP;
1380 
1381         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1382                 return -EFAULT;
1383 
1384         ret = dev->ethtool_ops->reset(dev, &reset.data);
1385         if (ret)
1386                 return ret;
1387 
1388         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1389                 return -EFAULT;
1390         return 0;
1391 }
1392 
1393 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1394 {
1395         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1396 
1397         if (!dev->ethtool_ops->get_wol)
1398                 return -EOPNOTSUPP;
1399 
1400         dev->ethtool_ops->get_wol(dev, &wol);
1401 
1402         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1403                 return -EFAULT;
1404         return 0;
1405 }
1406 
1407 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1408 {
1409         struct ethtool_wolinfo wol;
1410         int ret;
1411 
1412         if (!dev->ethtool_ops->set_wol)
1413                 return -EOPNOTSUPP;
1414 
1415         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1416                 return -EFAULT;
1417 
1418         ret = dev->ethtool_ops->set_wol(dev, &wol);
1419         if (ret)
1420                 return ret;
1421 
1422         dev->wol_enabled = !!wol.wolopts;
1423 
1424         return 0;
1425 }
1426 
1427 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1428 {
1429         struct ethtool_eee edata;
1430         int rc;
1431 
1432         if (!dev->ethtool_ops->get_eee)
1433                 return -EOPNOTSUPP;
1434 
1435         memset(&edata, 0, sizeof(struct ethtool_eee));
1436         edata.cmd = ETHTOOL_GEEE;
1437         rc = dev->ethtool_ops->get_eee(dev, &edata);
1438 
1439         if (rc)
1440                 return rc;
1441 
1442         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1443                 return -EFAULT;
1444 
1445         return 0;
1446 }
1447 
1448 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1449 {
1450         struct ethtool_eee edata;
1451 
1452         if (!dev->ethtool_ops->set_eee)
1453                 return -EOPNOTSUPP;
1454 
1455         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1456                 return -EFAULT;
1457 
1458         return dev->ethtool_ops->set_eee(dev, &edata);
1459 }
1460 
1461 static int ethtool_nway_reset(struct net_device *dev)
1462 {
1463         if (!dev->ethtool_ops->nway_reset)
1464                 return -EOPNOTSUPP;
1465 
1466         return dev->ethtool_ops->nway_reset(dev);
1467 }
1468 
1469 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1470 {
1471         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1472 
1473         if (!dev->ethtool_ops->get_link)
1474                 return -EOPNOTSUPP;
1475 
1476         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1477 
1478         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1479                 return -EFAULT;
1480         return 0;
1481 }
1482 
1483 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1484                                   int (*getter)(struct net_device *,
1485                                                 struct ethtool_eeprom *, u8 *),
1486                                   u32 total_len)
1487 {
1488         struct ethtool_eeprom eeprom;
1489         void __user *userbuf = useraddr + sizeof(eeprom);
1490         u32 bytes_remaining;
1491         u8 *data;
1492         int ret = 0;
1493 
1494         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1495                 return -EFAULT;
1496 
1497         /* Check for wrap and zero */
1498         if (eeprom.offset + eeprom.len <= eeprom.offset)
1499                 return -EINVAL;
1500 
1501         /* Check for exceeding total eeprom len */
1502         if (eeprom.offset + eeprom.len > total_len)
1503                 return -EINVAL;
1504 
1505         data = kmalloc(PAGE_SIZE, GFP_USER);
1506         if (!data)
1507                 return -ENOMEM;
1508 
1509         bytes_remaining = eeprom.len;
1510         while (bytes_remaining > 0) {
1511                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1512 
1513                 ret = getter(dev, &eeprom, data);
1514                 if (ret)
1515                         break;
1516                 if (copy_to_user(userbuf, data, eeprom.len)) {
1517                         ret = -EFAULT;
1518                         break;
1519                 }
1520                 userbuf += eeprom.len;
1521                 eeprom.offset += eeprom.len;
1522                 bytes_remaining -= eeprom.len;
1523         }
1524 
1525         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1526         eeprom.offset -= eeprom.len;
1527         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1528                 ret = -EFAULT;
1529 
1530         kfree(data);
1531         return ret;
1532 }
1533 
1534 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1535 {
1536         const struct ethtool_ops *ops = dev->ethtool_ops;
1537 
1538         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1539             !ops->get_eeprom_len(dev))
1540                 return -EOPNOTSUPP;
1541 
1542         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1543                                       ops->get_eeprom_len(dev));
1544 }
1545 
1546 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1547 {
1548         struct ethtool_eeprom eeprom;
1549         const struct ethtool_ops *ops = dev->ethtool_ops;
1550         void __user *userbuf = useraddr + sizeof(eeprom);
1551         u32 bytes_remaining;
1552         u8 *data;
1553         int ret = 0;
1554 
1555         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1556             !ops->get_eeprom_len(dev))
1557                 return -EOPNOTSUPP;
1558 
1559         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1560                 return -EFAULT;
1561 
1562         /* Check for wrap and zero */
1563         if (eeprom.offset + eeprom.len <= eeprom.offset)
1564                 return -EINVAL;
1565 
1566         /* Check for exceeding total eeprom len */
1567         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1568                 return -EINVAL;
1569 
1570         data = kmalloc(PAGE_SIZE, GFP_USER);
1571         if (!data)
1572                 return -ENOMEM;
1573 
1574         bytes_remaining = eeprom.len;
1575         while (bytes_remaining > 0) {
1576                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1577 
1578                 if (copy_from_user(data, userbuf, eeprom.len)) {
1579                         ret = -EFAULT;
1580                         break;
1581                 }
1582                 ret = ops->set_eeprom(dev, &eeprom, data);
1583                 if (ret)
1584                         break;
1585                 userbuf += eeprom.len;
1586                 eeprom.offset += eeprom.len;
1587                 bytes_remaining -= eeprom.len;
1588         }
1589 
1590         kfree(data);
1591         return ret;
1592 }
1593 
1594 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1595                                                    void __user *useraddr)
1596 {
1597         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1598 
1599         if (!dev->ethtool_ops->get_coalesce)
1600                 return -EOPNOTSUPP;
1601 
1602         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1603 
1604         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1605                 return -EFAULT;
1606         return 0;
1607 }
1608 
1609 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1610                                                    void __user *useraddr)
1611 {
1612         struct ethtool_coalesce coalesce;
1613 
1614         if (!dev->ethtool_ops->set_coalesce)
1615                 return -EOPNOTSUPP;
1616 
1617         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1618                 return -EFAULT;
1619 
1620         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1621 }
1622 
1623 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1624 {
1625         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1626 
1627         if (!dev->ethtool_ops->get_ringparam)
1628                 return -EOPNOTSUPP;
1629 
1630         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1631 
1632         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1633                 return -EFAULT;
1634         return 0;
1635 }
1636 
1637 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1638 {
1639         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1640 
1641         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1642                 return -EOPNOTSUPP;
1643 
1644         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1645                 return -EFAULT;
1646 
1647         dev->ethtool_ops->get_ringparam(dev, &max);
1648 
1649         /* ensure new ring parameters are within the maximums */
1650         if (ringparam.rx_pending > max.rx_max_pending ||
1651             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1652             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1653             ringparam.tx_pending > max.tx_max_pending)
1654                 return -EINVAL;
1655 
1656         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1657 }
1658 
1659 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1660                                                    void __user *useraddr)
1661 {
1662         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1663 
1664         if (!dev->ethtool_ops->get_channels)
1665                 return -EOPNOTSUPP;
1666 
1667         dev->ethtool_ops->get_channels(dev, &channels);
1668 
1669         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1670                 return -EFAULT;
1671         return 0;
1672 }
1673 
1674 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1675                                                    void __user *useraddr)
1676 {
1677         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1678         u16 from_channel, to_channel;
1679         u32 max_rx_in_use = 0;
1680         unsigned int i;
1681 
1682         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1683                 return -EOPNOTSUPP;
1684 
1685         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1686                 return -EFAULT;
1687 
1688         dev->ethtool_ops->get_channels(dev, &curr);
1689 
1690         /* ensure new counts are within the maximums */
1691         if (channels.rx_count > curr.max_rx ||
1692             channels.tx_count > curr.max_tx ||
1693             channels.combined_count > curr.max_combined ||
1694             channels.other_count > curr.max_other)
1695                 return -EINVAL;
1696 
1697         /* ensure the new Rx count fits within the configured Rx flow
1698          * indirection table settings */
1699         if (netif_is_rxfh_configured(dev) &&
1700             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1701             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1702             return -EINVAL;
1703 
1704         /* Disabling channels, query zero-copy AF_XDP sockets */
1705         from_channel = channels.combined_count +
1706                 min(channels.rx_count, channels.tx_count);
1707         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1708         for (i = from_channel; i < to_channel; i++)
1709                 if (xdp_get_umem_from_qid(dev, i))
1710                         return -EINVAL;
1711 
1712         return dev->ethtool_ops->set_channels(dev, &channels);
1713 }
1714 
1715 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1716 {
1717         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1718 
1719         if (!dev->ethtool_ops->get_pauseparam)
1720                 return -EOPNOTSUPP;
1721 
1722         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1723 
1724         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1725                 return -EFAULT;
1726         return 0;
1727 }
1728 
1729 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1730 {
1731         struct ethtool_pauseparam pauseparam;
1732 
1733         if (!dev->ethtool_ops->set_pauseparam)
1734                 return -EOPNOTSUPP;
1735 
1736         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1737                 return -EFAULT;
1738 
1739         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1740 }
1741 
1742 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1743 {
1744         struct ethtool_test test;
1745         const struct ethtool_ops *ops = dev->ethtool_ops;
1746         u64 *data;
1747         int ret, test_len;
1748 
1749         if (!ops->self_test || !ops->get_sset_count)
1750                 return -EOPNOTSUPP;
1751 
1752         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1753         if (test_len < 0)
1754                 return test_len;
1755         WARN_ON(test_len == 0);
1756 
1757         if (copy_from_user(&test, useraddr, sizeof(test)))
1758                 return -EFAULT;
1759 
1760         test.len = test_len;
1761         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1762         if (!data)
1763                 return -ENOMEM;
1764 
1765         ops->self_test(dev, &test, data);
1766 
1767         ret = -EFAULT;
1768         if (copy_to_user(useraddr, &test, sizeof(test)))
1769                 goto out;
1770         useraddr += sizeof(test);
1771         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1772                 goto out;
1773         ret = 0;
1774 
1775  out:
1776         kfree(data);
1777         return ret;
1778 }
1779 
1780 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1781 {
1782         struct ethtool_gstrings gstrings;
1783         u8 *data;
1784         int ret;
1785 
1786         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1787                 return -EFAULT;
1788 
1789         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1790         if (ret < 0)
1791                 return ret;
1792         if (ret > S32_MAX / ETH_GSTRING_LEN)
1793                 return -ENOMEM;
1794         WARN_ON_ONCE(!ret);
1795 
1796         gstrings.len = ret;
1797         data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1798         if (gstrings.len && !data)
1799                 return -ENOMEM;
1800 
1801         __ethtool_get_strings(dev, gstrings.string_set, data);
1802 
1803         ret = -EFAULT;
1804         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1805                 goto out;
1806         useraddr += sizeof(gstrings);
1807         if (gstrings.len &&
1808             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1809                 goto out;
1810         ret = 0;
1811 
1812 out:
1813         vfree(data);
1814         return ret;
1815 }
1816 
1817 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1818 {
1819         struct ethtool_value id;
1820         static bool busy;
1821         const struct ethtool_ops *ops = dev->ethtool_ops;
1822         int rc;
1823 
1824         if (!ops->set_phys_id)
1825                 return -EOPNOTSUPP;
1826 
1827         if (busy)
1828                 return -EBUSY;
1829 
1830         if (copy_from_user(&id, useraddr, sizeof(id)))
1831                 return -EFAULT;
1832 
1833         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1834         if (rc < 0)
1835                 return rc;
1836 
1837         /* Drop the RTNL lock while waiting, but prevent reentry or
1838          * removal of the device.
1839          */
1840         busy = true;
1841         dev_hold(dev);
1842         rtnl_unlock();
1843 
1844         if (rc == 0) {
1845                 /* Driver will handle this itself */
1846                 schedule_timeout_interruptible(
1847                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1848         } else {
1849                 /* Driver expects to be called at twice the frequency in rc */
1850                 int n = rc * 2, i, interval = HZ / n;
1851 
1852                 /* Count down seconds */
1853                 do {
1854                         /* Count down iterations per second */
1855                         i = n;
1856                         do {
1857                                 rtnl_lock();
1858                                 rc = ops->set_phys_id(dev,
1859                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1860                                 rtnl_unlock();
1861                                 if (rc)
1862                                         break;
1863                                 schedule_timeout_interruptible(interval);
1864                         } while (!signal_pending(current) && --i != 0);
1865                 } while (!signal_pending(current) &&
1866                          (id.data == 0 || --id.data != 0));
1867         }
1868 
1869         rtnl_lock();
1870         dev_put(dev);
1871         busy = false;
1872 
1873         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1874         return rc;
1875 }
1876 
1877 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1878 {
1879         struct ethtool_stats stats;
1880         const struct ethtool_ops *ops = dev->ethtool_ops;
1881         u64 *data;
1882         int ret, n_stats;
1883 
1884         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1885                 return -EOPNOTSUPP;
1886 
1887         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1888         if (n_stats < 0)
1889                 return n_stats;
1890         if (n_stats > S32_MAX / sizeof(u64))
1891                 return -ENOMEM;
1892         WARN_ON_ONCE(!n_stats);
1893         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1894                 return -EFAULT;
1895 
1896         stats.n_stats = n_stats;
1897         data = vzalloc(array_size(n_stats, sizeof(u64)));
1898         if (n_stats && !data)
1899                 return -ENOMEM;
1900 
1901         ops->get_ethtool_stats(dev, &stats, data);
1902 
1903         ret = -EFAULT;
1904         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1905                 goto out;
1906         useraddr += sizeof(stats);
1907         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1908                 goto out;
1909         ret = 0;
1910 
1911  out:
1912         vfree(data);
1913         return ret;
1914 }
1915 
1916 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1917 {
1918         const struct ethtool_ops *ops = dev->ethtool_ops;
1919         struct phy_device *phydev = dev->phydev;
1920         struct ethtool_stats stats;
1921         u64 *data;
1922         int ret, n_stats;
1923 
1924         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1925                 return -EOPNOTSUPP;
1926 
1927         if (dev->phydev && !ops->get_ethtool_phy_stats)
1928                 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1929         else
1930                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1931         if (n_stats < 0)
1932                 return n_stats;
1933         if (n_stats > S32_MAX / sizeof(u64))
1934                 return -ENOMEM;
1935         WARN_ON_ONCE(!n_stats);
1936 
1937         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1938                 return -EFAULT;
1939 
1940         stats.n_stats = n_stats;
1941         data = vzalloc(array_size(n_stats, sizeof(u64)));
1942         if (n_stats && !data)
1943                 return -ENOMEM;
1944 
1945         if (dev->phydev && !ops->get_ethtool_phy_stats) {
1946                 ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1947                 if (ret < 0)
1948                         return ret;
1949         } else {
1950                 ops->get_ethtool_phy_stats(dev, &stats, data);
1951         }
1952 
1953         ret = -EFAULT;
1954         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1955                 goto out;
1956         useraddr += sizeof(stats);
1957         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1958                 goto out;
1959         ret = 0;
1960 
1961  out:
1962         vfree(data);
1963         return ret;
1964 }
1965 
1966 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1967 {
1968         struct ethtool_perm_addr epaddr;
1969 
1970         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1971                 return -EFAULT;
1972 
1973         if (epaddr.size < dev->addr_len)
1974                 return -ETOOSMALL;
1975         epaddr.size = dev->addr_len;
1976 
1977         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1978                 return -EFAULT;
1979         useraddr += sizeof(epaddr);
1980         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1981                 return -EFAULT;
1982         return 0;
1983 }
1984 
1985 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1986                              u32 cmd, u32 (*actor)(struct net_device *))
1987 {
1988         struct ethtool_value edata = { .cmd = cmd };
1989 
1990         if (!actor)
1991                 return -EOPNOTSUPP;
1992 
1993         edata.data = actor(dev);
1994 
1995         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1996                 return -EFAULT;
1997         return 0;
1998 }
1999 
2000 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2001                              void (*actor)(struct net_device *, u32))
2002 {
2003         struct ethtool_value edata;
2004 
2005         if (!actor)
2006                 return -EOPNOTSUPP;
2007 
2008         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2009                 return -EFAULT;
2010 
2011         actor(dev, edata.data);
2012         return 0;
2013 }
2014 
2015 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2016                              int (*actor)(struct net_device *, u32))
2017 {
2018         struct ethtool_value edata;
2019 
2020         if (!actor)
2021                 return -EOPNOTSUPP;
2022 
2023         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2024                 return -EFAULT;
2025 
2026         return actor(dev, edata.data);
2027 }
2028 
2029 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2030                                                    char __user *useraddr)
2031 {
2032         struct ethtool_flash efl;
2033 
2034         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2035                 return -EFAULT;
2036 
2037         if (!dev->ethtool_ops->flash_device)
2038                 return -EOPNOTSUPP;
2039 
2040         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2041 
2042         return dev->ethtool_ops->flash_device(dev, &efl);
2043 }
2044 
2045 static int ethtool_set_dump(struct net_device *dev,
2046                         void __user *useraddr)
2047 {
2048         struct ethtool_dump dump;
2049 
2050         if (!dev->ethtool_ops->set_dump)
2051                 return -EOPNOTSUPP;
2052 
2053         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2054                 return -EFAULT;
2055 
2056         return dev->ethtool_ops->set_dump(dev, &dump);
2057 }
2058 
2059 static int ethtool_get_dump_flag(struct net_device *dev,
2060                                 void __user *useraddr)
2061 {
2062         int ret;
2063         struct ethtool_dump dump;
2064         const struct ethtool_ops *ops = dev->ethtool_ops;
2065 
2066         if (!ops->get_dump_flag)
2067                 return -EOPNOTSUPP;
2068 
2069         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2070                 return -EFAULT;
2071 
2072         ret = ops->get_dump_flag(dev, &dump);
2073         if (ret)
2074                 return ret;
2075 
2076         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2077                 return -EFAULT;
2078         return 0;
2079 }
2080 
2081 static int ethtool_get_dump_data(struct net_device *dev,
2082                                 void __user *useraddr)
2083 {
2084         int ret;
2085         __u32 len;
2086         struct ethtool_dump dump, tmp;
2087         const struct ethtool_ops *ops = dev->ethtool_ops;
2088         void *data = NULL;
2089 
2090         if (!ops->get_dump_data || !ops->get_dump_flag)
2091                 return -EOPNOTSUPP;
2092 
2093         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2094                 return -EFAULT;
2095 
2096         memset(&tmp, 0, sizeof(tmp));
2097         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2098         ret = ops->get_dump_flag(dev, &tmp);
2099         if (ret)
2100                 return ret;
2101 
2102         len = min(tmp.len, dump.len);
2103         if (!len)
2104                 return -EFAULT;
2105 
2106         /* Don't ever let the driver think there's more space available
2107          * than it requested with .get_dump_flag().
2108          */
2109         dump.len = len;
2110 
2111         /* Always allocate enough space to hold the whole thing so that the
2112          * driver does not need to check the length and bother with partial
2113          * dumping.
2114          */
2115         data = vzalloc(tmp.len);
2116         if (!data)
2117                 return -ENOMEM;
2118         ret = ops->get_dump_data(dev, &dump, data);
2119         if (ret)
2120                 goto out;
2121 
2122         /* There are two sane possibilities:
2123          * 1. The driver's .get_dump_data() does not touch dump.len.
2124          * 2. Or it may set dump.len to how much it really writes, which
2125          *    should be tmp.len (or len if it can do a partial dump).
2126          * In any case respond to userspace with the actual length of data
2127          * it's receiving.
2128          */
2129         WARN_ON(dump.len != len && dump.len != tmp.len);
2130         dump.len = len;
2131 
2132         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2133                 ret = -EFAULT;
2134                 goto out;
2135         }
2136         useraddr += offsetof(struct ethtool_dump, data);
2137         if (copy_to_user(useraddr, data, len))
2138                 ret = -EFAULT;
2139 out:
2140         vfree(data);
2141         return ret;
2142 }
2143 
2144 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2145 {
2146         int err = 0;
2147         struct ethtool_ts_info info;
2148         const struct ethtool_ops *ops = dev->ethtool_ops;
2149         struct phy_device *phydev = dev->phydev;
2150 
2151         memset(&info, 0, sizeof(info));
2152         info.cmd = ETHTOOL_GET_TS_INFO;
2153 
2154         if (phydev && phydev->drv && phydev->drv->ts_info) {
2155                 err = phydev->drv->ts_info(phydev, &info);
2156         } else if (ops->get_ts_info) {
2157                 err = ops->get_ts_info(dev, &info);
2158         } else {
2159                 info.so_timestamping =
2160                         SOF_TIMESTAMPING_RX_SOFTWARE |
2161                         SOF_TIMESTAMPING_SOFTWARE;
2162                 info.phc_index = -1;
2163         }
2164 
2165         if (err)
2166                 return err;
2167 
2168         if (copy_to_user(useraddr, &info, sizeof(info)))
2169                 err = -EFAULT;
2170 
2171         return err;
2172 }
2173 
2174 static int __ethtool_get_module_info(struct net_device *dev,
2175                                      struct ethtool_modinfo *modinfo)
2176 {
2177         const struct ethtool_ops *ops = dev->ethtool_ops;
2178         struct phy_device *phydev = dev->phydev;
2179 
2180         if (dev->sfp_bus)
2181                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2182 
2183         if (phydev && phydev->drv && phydev->drv->module_info)
2184                 return phydev->drv->module_info(phydev, modinfo);
2185 
2186         if (ops->get_module_info)
2187                 return ops->get_module_info(dev, modinfo);
2188 
2189         return -EOPNOTSUPP;
2190 }
2191 
2192 static int ethtool_get_module_info(struct net_device *dev,
2193                                    void __user *useraddr)
2194 {
2195         int ret;
2196         struct ethtool_modinfo modinfo;
2197 
2198         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2199                 return -EFAULT;
2200 
2201         ret = __ethtool_get_module_info(dev, &modinfo);
2202         if (ret)
2203                 return ret;
2204 
2205         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2206                 return -EFAULT;
2207 
2208         return 0;
2209 }
2210 
2211 static int __ethtool_get_module_eeprom(struct net_device *dev,
2212                                        struct ethtool_eeprom *ee, u8 *data)
2213 {
2214         const struct ethtool_ops *ops = dev->ethtool_ops;
2215         struct phy_device *phydev = dev->phydev;
2216 
2217         if (dev->sfp_bus)
2218                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2219 
2220         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2221                 return phydev->drv->module_eeprom(phydev, ee, data);
2222 
2223         if (ops->get_module_eeprom)
2224                 return ops->get_module_eeprom(dev, ee, data);
2225 
2226         return -EOPNOTSUPP;
2227 }
2228 
2229 static int ethtool_get_module_eeprom(struct net_device *dev,
2230                                      void __user *useraddr)
2231 {
2232         int ret;
2233         struct ethtool_modinfo modinfo;
2234 
2235         ret = __ethtool_get_module_info(dev, &modinfo);
2236         if (ret)
2237                 return ret;
2238 
2239         return ethtool_get_any_eeprom(dev, useraddr,
2240                                       __ethtool_get_module_eeprom,
2241                                       modinfo.eeprom_len);
2242 }
2243 
2244 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2245 {
2246         switch (tuna->id) {
2247         case ETHTOOL_RX_COPYBREAK:
2248         case ETHTOOL_TX_COPYBREAK:
2249                 if (tuna->len != sizeof(u32) ||
2250                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2251                         return -EINVAL;
2252                 break;
2253         case ETHTOOL_PFC_PREVENTION_TOUT:
2254                 if (tuna->len != sizeof(u16) ||
2255                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2256                         return -EINVAL;
2257                 break;
2258         default:
2259                 return -EINVAL;
2260         }
2261 
2262         return 0;
2263 }
2264 
2265 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2266 {
2267         int ret;
2268         struct ethtool_tunable tuna;
2269         const struct ethtool_ops *ops = dev->ethtool_ops;
2270         void *data;
2271 
2272         if (!ops->get_tunable)
2273                 return -EOPNOTSUPP;
2274         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2275                 return -EFAULT;
2276         ret = ethtool_tunable_valid(&tuna);
2277         if (ret)
2278                 return ret;
2279         data = kmalloc(tuna.len, GFP_USER);
2280         if (!data)
2281                 return -ENOMEM;
2282         ret = ops->get_tunable(dev, &tuna, data);
2283         if (ret)
2284                 goto out;
2285         useraddr += sizeof(tuna);
2286         ret = -EFAULT;
2287         if (copy_to_user(useraddr, data, tuna.len))
2288                 goto out;
2289         ret = 0;
2290 
2291 out:
2292         kfree(data);
2293         return ret;
2294 }
2295 
2296 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2297 {
2298         int ret;
2299         struct ethtool_tunable tuna;
2300         const struct ethtool_ops *ops = dev->ethtool_ops;
2301         void *data;
2302 
2303         if (!ops->set_tunable)
2304                 return -EOPNOTSUPP;
2305         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2306                 return -EFAULT;
2307         ret = ethtool_tunable_valid(&tuna);
2308         if (ret)
2309                 return ret;
2310         useraddr += sizeof(tuna);
2311         data = memdup_user(useraddr, tuna.len);
2312         if (IS_ERR(data))
2313                 return PTR_ERR(data);
2314         ret = ops->set_tunable(dev, &tuna, data);
2315 
2316         kfree(data);
2317         return ret;
2318 }
2319 
2320 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2321                                           void __user *useraddr,
2322                                           struct ethtool_per_queue_op *per_queue_opt)
2323 {
2324         u32 bit;
2325         int ret;
2326         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2327 
2328         if (!dev->ethtool_ops->get_per_queue_coalesce)
2329                 return -EOPNOTSUPP;
2330 
2331         useraddr += sizeof(*per_queue_opt);
2332 
2333         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2334                           MAX_NUM_QUEUE);
2335 
2336         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2337                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2338 
2339                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2340                 if (ret != 0)
2341                         return ret;
2342                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2343                         return -EFAULT;
2344                 useraddr += sizeof(coalesce);
2345         }
2346 
2347         return 0;
2348 }
2349 
2350 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2351                                           void __user *useraddr,
2352                                           struct ethtool_per_queue_op *per_queue_opt)
2353 {
2354         u32 bit;
2355         int i, ret = 0;
2356         int n_queue;
2357         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2358         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2359 
2360         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2361             (!dev->ethtool_ops->get_per_queue_coalesce))
2362                 return -EOPNOTSUPP;
2363 
2364         useraddr += sizeof(*per_queue_opt);
2365 
2366         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2367         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2368         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2369         if (!backup)
2370                 return -ENOMEM;
2371 
2372         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2373                 struct ethtool_coalesce coalesce;
2374 
2375                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2376                 if (ret != 0)
2377                         goto roll_back;
2378 
2379                 tmp++;
2380 
2381                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2382                         ret = -EFAULT;
2383                         goto roll_back;
2384                 }
2385 
2386                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2387                 if (ret != 0)
2388                         goto roll_back;
2389 
2390                 useraddr += sizeof(coalesce);
2391         }
2392 
2393 roll_back:
2394         if (ret != 0) {
2395                 tmp = backup;
2396                 for_each_set_bit(i, queue_mask, bit) {
2397                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2398                         tmp++;
2399                 }
2400         }
2401         kfree(backup);
2402 
2403         return ret;
2404 }
2405 
2406 static int ethtool_set_per_queue(struct net_device *dev,
2407                                  void __user *useraddr, u32 sub_cmd)
2408 {
2409         struct ethtool_per_queue_op per_queue_opt;
2410 
2411         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2412                 return -EFAULT;
2413 
2414         if (per_queue_opt.sub_command != sub_cmd)
2415                 return -EINVAL;
2416 
2417         switch (per_queue_opt.sub_command) {
2418         case ETHTOOL_GCOALESCE:
2419                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2420         case ETHTOOL_SCOALESCE:
2421                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2422         default:
2423                 return -EOPNOTSUPP;
2424         };
2425 }
2426 
2427 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2428 {
2429         switch (tuna->id) {
2430         case ETHTOOL_PHY_DOWNSHIFT:
2431                 if (tuna->len != sizeof(u8) ||
2432                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2433                         return -EINVAL;
2434                 break;
2435         default:
2436                 return -EINVAL;
2437         }
2438 
2439         return 0;
2440 }
2441 
2442 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2443 {
2444         int ret;
2445         struct ethtool_tunable tuna;
2446         struct phy_device *phydev = dev->phydev;
2447         void *data;
2448 
2449         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2450                 return -EOPNOTSUPP;
2451 
2452         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2453                 return -EFAULT;
2454         ret = ethtool_phy_tunable_valid(&tuna);
2455         if (ret)
2456                 return ret;
2457         data = kmalloc(tuna.len, GFP_USER);
2458         if (!data)
2459                 return -ENOMEM;
2460         mutex_lock(&phydev->lock);
2461         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2462         mutex_unlock(&phydev->lock);
2463         if (ret)
2464                 goto out;
2465         useraddr += sizeof(tuna);
2466         ret = -EFAULT;
2467         if (copy_to_user(useraddr, data, tuna.len))
2468                 goto out;
2469         ret = 0;
2470 
2471 out:
2472         kfree(data);
2473         return ret;
2474 }
2475 
2476 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2477 {
2478         int ret;
2479         struct ethtool_tunable tuna;
2480         struct phy_device *phydev = dev->phydev;
2481         void *data;
2482 
2483         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2484                 return -EOPNOTSUPP;
2485         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2486                 return -EFAULT;
2487         ret = ethtool_phy_tunable_valid(&tuna);
2488         if (ret)
2489                 return ret;
2490         useraddr += sizeof(tuna);
2491         data = memdup_user(useraddr, tuna.len);
2492         if (IS_ERR(data))
2493                 return PTR_ERR(data);
2494         mutex_lock(&phydev->lock);
2495         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2496         mutex_unlock(&phydev->lock);
2497 
2498         kfree(data);
2499         return ret;
2500 }
2501 
2502 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2503 {
2504         struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2505         int rc;
2506 
2507         if (!dev->ethtool_ops->get_fecparam)
2508                 return -EOPNOTSUPP;
2509 
2510         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2511         if (rc)
2512                 return rc;
2513 
2514         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2515                 return -EFAULT;
2516         return 0;
2517 }
2518 
2519 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2520 {
2521         struct ethtool_fecparam fecparam;
2522 
2523         if (!dev->ethtool_ops->set_fecparam)
2524                 return -EOPNOTSUPP;
2525 
2526         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2527                 return -EFAULT;
2528 
2529         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2530 }
2531 
2532 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2533 
2534 int dev_ethtool(struct net *net, struct ifreq *ifr)
2535 {
2536         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2537         void __user *useraddr = ifr->ifr_data;
2538         u32 ethcmd, sub_cmd;
2539         int rc;
2540         netdev_features_t old_features;
2541 
2542         if (!dev || !netif_device_present(dev))
2543                 return -ENODEV;
2544 
2545         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2546                 return -EFAULT;
2547 
2548         if (ethcmd == ETHTOOL_PERQUEUE) {
2549                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2550                         return -EFAULT;
2551         } else {
2552                 sub_cmd = ethcmd;
2553         }
2554         /* Allow some commands to be done by anyone */
2555         switch (sub_cmd) {
2556         case ETHTOOL_GSET:
2557         case ETHTOOL_GDRVINFO:
2558         case ETHTOOL_GMSGLVL:
2559         case ETHTOOL_GLINK:
2560         case ETHTOOL_GCOALESCE:
2561         case ETHTOOL_GRINGPARAM:
2562         case ETHTOOL_GPAUSEPARAM:
2563         case ETHTOOL_GRXCSUM:
2564         case ETHTOOL_GTXCSUM:
2565         case ETHTOOL_GSG:
2566         case ETHTOOL_GSSET_INFO:
2567         case ETHTOOL_GSTRINGS:
2568         case ETHTOOL_GSTATS:
2569         case ETHTOOL_GPHYSTATS:
2570         case ETHTOOL_GTSO:
2571         case ETHTOOL_GPERMADDR:
2572         case ETHTOOL_GUFO:
2573         case ETHTOOL_GGSO:
2574         case ETHTOOL_GGRO:
2575         case ETHTOOL_GFLAGS:
2576         case ETHTOOL_GPFLAGS:
2577         case ETHTOOL_GRXFH:
2578         case ETHTOOL_GRXRINGS:
2579         case ETHTOOL_GRXCLSRLCNT:
2580         case ETHTOOL_GRXCLSRULE:
2581         case ETHTOOL_GRXCLSRLALL:
2582         case ETHTOOL_GRXFHINDIR:
2583         case ETHTOOL_GRSSH:
2584         case ETHTOOL_GFEATURES:
2585         case ETHTOOL_GCHANNELS:
2586         case ETHTOOL_GET_TS_INFO:
2587         case ETHTOOL_GEEE:
2588         case ETHTOOL_GTUNABLE:
2589         case ETHTOOL_PHY_GTUNABLE:
2590         case ETHTOOL_GLINKSETTINGS:
2591         case ETHTOOL_GFECPARAM:
2592                 break;
2593         default:
2594                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2595                         return -EPERM;
2596         }
2597 
2598         if (dev->ethtool_ops->begin) {
2599                 rc = dev->ethtool_ops->begin(dev);
2600                 if (rc  < 0)
2601                         return rc;
2602         }
2603         old_features = dev->features;
2604 
2605         switch (ethcmd) {
2606         case ETHTOOL_GSET:
2607                 rc = ethtool_get_settings(dev, useraddr);
2608                 break;
2609         case ETHTOOL_SSET:
2610                 rc = ethtool_set_settings(dev, useraddr);
2611                 break;
2612         case ETHTOOL_GDRVINFO:
2613                 rc = ethtool_get_drvinfo(dev, useraddr);
2614                 break;
2615         case ETHTOOL_GREGS:
2616                 rc = ethtool_get_regs(dev, useraddr);
2617                 break;
2618         case ETHTOOL_GWOL:
2619                 rc = ethtool_get_wol(dev, useraddr);
2620                 break;
2621         case ETHTOOL_SWOL:
2622                 rc = ethtool_set_wol(dev, useraddr);
2623                 break;
2624         case ETHTOOL_GMSGLVL:
2625                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2626                                        dev->ethtool_ops->get_msglevel);
2627                 break;
2628         case ETHTOOL_SMSGLVL:
2629                 rc = ethtool_set_value_void(dev, useraddr,
2630                                        dev->ethtool_ops->set_msglevel);
2631                 break;
2632         case ETHTOOL_GEEE:
2633                 rc = ethtool_get_eee(dev, useraddr);
2634                 break;
2635         case ETHTOOL_SEEE:
2636                 rc = ethtool_set_eee(dev, useraddr);
2637                 break;
2638         case ETHTOOL_NWAY_RST:
2639                 rc = ethtool_nway_reset(dev);
2640                 break;
2641         case ETHTOOL_GLINK:
2642                 rc = ethtool_get_link(dev, useraddr);
2643                 break;
2644         case ETHTOOL_GEEPROM:
2645                 rc = ethtool_get_eeprom(dev, useraddr);
2646                 break;
2647         case ETHTOOL_SEEPROM:
2648                 rc = ethtool_set_eeprom(dev, useraddr);
2649                 break;
2650         case ETHTOOL_GCOALESCE:
2651                 rc = ethtool_get_coalesce(dev, useraddr);
2652                 break;
2653         case ETHTOOL_SCOALESCE:
2654                 rc = ethtool_set_coalesce(dev, useraddr);
2655                 break;
2656         case ETHTOOL_GRINGPARAM:
2657                 rc = ethtool_get_ringparam(dev, useraddr);
2658                 break;
2659         case ETHTOOL_SRINGPARAM:
2660                 rc = ethtool_set_ringparam(dev, useraddr);
2661                 break;
2662         case ETHTOOL_GPAUSEPARAM:
2663                 rc = ethtool_get_pauseparam(dev, useraddr);
2664                 break;
2665         case ETHTOOL_SPAUSEPARAM:
2666                 rc = ethtool_set_pauseparam(dev, useraddr);
2667                 break;
2668         case ETHTOOL_TEST:
2669                 rc = ethtool_self_test(dev, useraddr);
2670                 break;
2671         case ETHTOOL_GSTRINGS:
2672                 rc = ethtool_get_strings(dev, useraddr);
2673                 break;
2674         case ETHTOOL_PHYS_ID:
2675                 rc = ethtool_phys_id(dev, useraddr);
2676                 break;
2677         case ETHTOOL_GSTATS:
2678                 rc = ethtool_get_stats(dev, useraddr);
2679                 break;
2680         case ETHTOOL_GPERMADDR:
2681                 rc = ethtool_get_perm_addr(dev, useraddr);
2682                 break;
2683         case ETHTOOL_GFLAGS:
2684                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2685                                         __ethtool_get_flags);
2686                 break;
2687         case ETHTOOL_SFLAGS:
2688                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2689                 break;
2690         case ETHTOOL_GPFLAGS:
2691                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2692                                        dev->ethtool_ops->get_priv_flags);
2693                 break;
2694         case ETHTOOL_SPFLAGS:
2695                 rc = ethtool_set_value(dev, useraddr,
2696                                        dev->ethtool_ops->set_priv_flags);
2697                 break;
2698         case ETHTOOL_GRXFH:
2699         case ETHTOOL_GRXRINGS:
2700         case ETHTOOL_GRXCLSRLCNT:
2701         case ETHTOOL_GRXCLSRULE:
2702         case ETHTOOL_GRXCLSRLALL:
2703                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2704                 break;
2705         case ETHTOOL_SRXFH:
2706         case ETHTOOL_SRXCLSRLDEL:
2707         case ETHTOOL_SRXCLSRLINS:
2708                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2709                 break;
2710         case ETHTOOL_FLASHDEV:
2711                 rc = ethtool_flash_device(dev, useraddr);
2712                 break;
2713         case ETHTOOL_RESET:
2714                 rc = ethtool_reset(dev, useraddr);
2715                 break;
2716         case ETHTOOL_GSSET_INFO:
2717                 rc = ethtool_get_sset_info(dev, useraddr);
2718                 break;
2719         case ETHTOOL_GRXFHINDIR:
2720                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2721                 break;
2722         case ETHTOOL_SRXFHINDIR:
2723                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2724                 break;
2725         case ETHTOOL_GRSSH:
2726                 rc = ethtool_get_rxfh(dev, useraddr);
2727                 break;
2728         case ETHTOOL_SRSSH:
2729                 rc = ethtool_set_rxfh(dev, useraddr);
2730                 break;
2731         case ETHTOOL_GFEATURES:
2732                 rc = ethtool_get_features(dev, useraddr);
2733                 break;
2734         case ETHTOOL_SFEATURES:
2735                 rc = ethtool_set_features(dev, useraddr);
2736                 break;
2737         case ETHTOOL_GTXCSUM:
2738         case ETHTOOL_GRXCSUM:
2739         case ETHTOOL_GSG:
2740         case ETHTOOL_GTSO:
2741         case ETHTOOL_GGSO:
2742         case ETHTOOL_GGRO:
2743                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2744                 break;
2745         case ETHTOOL_STXCSUM:
2746         case ETHTOOL_SRXCSUM:
2747         case ETHTOOL_SSG:
2748         case ETHTOOL_STSO:
2749         case ETHTOOL_SGSO:
2750         case ETHTOOL_SGRO:
2751                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2752                 break;
2753         case ETHTOOL_GCHANNELS:
2754                 rc = ethtool_get_channels(dev, useraddr);
2755                 break;
2756         case ETHTOOL_SCHANNELS:
2757                 rc = ethtool_set_channels(dev, useraddr);
2758                 break;
2759         case ETHTOOL_SET_DUMP:
2760                 rc = ethtool_set_dump(dev, useraddr);
2761                 break;
2762         case ETHTOOL_GET_DUMP_FLAG:
2763                 rc = ethtool_get_dump_flag(dev, useraddr);
2764                 break;
2765         case ETHTOOL_GET_DUMP_DATA:
2766                 rc = ethtool_get_dump_data(dev, useraddr);
2767                 break;
2768         case ETHTOOL_GET_TS_INFO:
2769                 rc = ethtool_get_ts_info(dev, useraddr);
2770                 break;
2771         case ETHTOOL_GMODULEINFO:
2772                 rc = ethtool_get_module_info(dev, useraddr);
2773                 break;
2774         case ETHTOOL_GMODULEEEPROM:
2775                 rc = ethtool_get_module_eeprom(dev, useraddr);
2776                 break;
2777         case ETHTOOL_GTUNABLE:
2778                 rc = ethtool_get_tunable(dev, useraddr);
2779                 break;
2780         case ETHTOOL_STUNABLE:
2781                 rc = ethtool_set_tunable(dev, useraddr);
2782                 break;
2783         case ETHTOOL_GPHYSTATS:
2784                 rc = ethtool_get_phy_stats(dev, useraddr);
2785                 break;
2786         case ETHTOOL_PERQUEUE:
2787                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2788                 break;
2789         case ETHTOOL_GLINKSETTINGS:
2790                 rc = ethtool_get_link_ksettings(dev, useraddr);
2791                 break;
2792         case ETHTOOL_SLINKSETTINGS:
2793                 rc = ethtool_set_link_ksettings(dev, useraddr);
2794                 break;
2795         case ETHTOOL_PHY_GTUNABLE:
2796                 rc = get_phy_tunable(dev, useraddr);
2797                 break;
2798         case ETHTOOL_PHY_STUNABLE:
2799                 rc = set_phy_tunable(dev, useraddr);
2800                 break;
2801         case ETHTOOL_GFECPARAM:
2802                 rc = ethtool_get_fecparam(dev, useraddr);
2803                 break;
2804         case ETHTOOL_SFECPARAM:
2805                 rc = ethtool_set_fecparam(dev, useraddr);
2806                 break;
2807         default:
2808                 rc = -EOPNOTSUPP;
2809         }
2810 
2811         if (dev->ethtool_ops->complete)
2812                 dev->ethtool_ops->complete(dev);
2813 
2814         if (old_features != dev->features)
2815                 netdev_features_change(dev);
2816 
2817         return rc;
2818 }
2819 

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