/* * net/core/ethtool.c - Ethtool ioctl handler * Copyright (c) 2003 Matthew Wilcox * * This file is where we call all the ethtool_ops commands to get * the information ethtool needs. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include /* * Some useful ethtool_ops methods that're device independent. * If we find that all drivers want to do the same thing here, * we can turn these into dev_() function calls. */ u32 ethtool_op_get_link(struct net_device *dev) { return netif_carrier_ok(dev) ? 1 : 0; } EXPORT_SYMBOL(ethtool_op_get_link); /* Handlers for each ethtool command */ #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32) static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = { [NETIF_F_SG_BIT] = "tx-scatter-gather", [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4", [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic", [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6", [NETIF_F_HIGHDMA_BIT] = "highdma", [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist", [NETIF_F_HW_VLAN_TX_BIT] = "tx-vlan-hw-insert", [NETIF_F_HW_VLAN_RX_BIT] = "rx-vlan-hw-parse", [NETIF_F_HW_VLAN_FILTER_BIT] = "rx-vlan-filter", [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged", [NETIF_F_GSO_BIT] = "tx-generic-segmentation", [NETIF_F_LLTX_BIT] = "tx-lockless", [NETIF_F_NETNS_LOCAL_BIT] = "netns-local", [NETIF_F_GRO_BIT] = "rx-gro", [NETIF_F_LRO_BIT] = "rx-lro", [NETIF_F_TSO_BIT] = "tx-tcp-segmentation", [NETIF_F_UFO_BIT] = "tx-udp-fragmentation", [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust", [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation", [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation", [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation", [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc", [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp", [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu", [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter", [NETIF_F_RXHASH_BIT] = "rx-hashing", [NETIF_F_RXCSUM_BIT] = "rx-checksum", [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy", [NETIF_F_LOOPBACK_BIT] = "loopback", }; static int ethtool_get_features(struct net_device *dev, void __user *useraddr) { struct ethtool_gfeatures cmd = { .cmd = ETHTOOL_GFEATURES, .size = ETHTOOL_DEV_FEATURE_WORDS, }; struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; u32 __user *sizeaddr; u32 copy_size; int i; /* in case feature bits run out again */ BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t)); for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { features[i].available = (u32)(dev->hw_features >> (32 * i)); features[i].requested = (u32)(dev->wanted_features >> (32 * i)); features[i].active = (u32)(dev->features >> (32 * i)); features[i].never_changed = (u32)(NETIF_F_NEVER_CHANGE >> (32 * i)); } sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size); if (get_user(copy_size, sizeaddr)) return -EFAULT; if (copy_size > ETHTOOL_DEV_FEATURE_WORDS) copy_size = ETHTOOL_DEV_FEATURE_WORDS; if (copy_to_user(useraddr, &cmd, sizeof(cmd))) return -EFAULT; useraddr += sizeof(cmd); if (copy_to_user(useraddr, features, copy_size * sizeof(*features))) return -EFAULT; return 0; } static int ethtool_set_features(struct net_device *dev, void __user *useraddr) { struct ethtool_sfeatures cmd; struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; netdev_features_t wanted = 0, valid = 0; int i, ret = 0; if (copy_from_user(&cmd, useraddr, sizeof(cmd))) return -EFAULT; useraddr += sizeof(cmd); if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS) return -EINVAL; if (copy_from_user(features, useraddr, sizeof(features))) return -EFAULT; for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { valid |= (netdev_features_t)features[i].valid << (32 * i); wanted |= (netdev_features_t)features[i].requested << (32 * i); } if (valid & ~NETIF_F_ETHTOOL_BITS) return -EINVAL; if (valid & ~dev->hw_features) { valid &= dev->hw_features; ret |= ETHTOOL_F_UNSUPPORTED; } dev->wanted_features &= ~valid; dev->wanted_features |= wanted & valid; __netdev_update_features(dev); if ((dev->wanted_features ^ dev->features) & valid) ret |= ETHTOOL_F_WISH; return ret; } static int __ethtool_get_sset_count(struct net_device *dev, int sset) { const struct ethtool_ops *ops = dev->ethtool_ops; if (sset == ETH_SS_FEATURES) return ARRAY_SIZE(netdev_features_strings); if (ops && ops->get_sset_count && ops->get_strings) return ops->get_sset_count(dev, sset); else return -EOPNOTSUPP; } static void __ethtool_get_strings(struct net_device *dev, u32 stringset, u8 *data) { const struct ethtool_ops *ops = dev->ethtool_ops; if (stringset == ETH_SS_FEATURES) memcpy(data, netdev_features_strings, sizeof(netdev_features_strings)); else /* ops->get_strings is valid because checked earlier */ ops->get_strings(dev, stringset, data); } static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) { /* feature masks of legacy discrete ethtool ops */ switch (eth_cmd) { case ETHTOOL_GTXCSUM: case ETHTOOL_STXCSUM: return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM; case ETHTOOL_GRXCSUM: case ETHTOOL_SRXCSUM: return NETIF_F_RXCSUM; case ETHTOOL_GSG: case ETHTOOL_SSG: return NETIF_F_SG; case ETHTOOL_GTSO: case ETHTOOL_STSO: return NETIF_F_ALL_TSO; case ETHTOOL_GUFO: case ETHTOOL_SUFO: return NETIF_F_UFO; case ETHTOOL_GGSO: case ETHTOOL_SGSO: return NETIF_F_GSO; case ETHTOOL_GGRO: case ETHTOOL_SGRO: return NETIF_F_GRO; default: BUG(); } } static int ethtool_get_one_feature(struct net_device *dev, char __user *useraddr, u32 ethcmd) { netdev_features_t mask = ethtool_get_feature_mask(ethcmd); struct ethtool_value edata = { .cmd = ethcmd, .data = !!(dev->features & mask), }; if (copy_to_user(useraddr, &edata, sizeof(edata))) return -EFAULT; return 0; } static int ethtool_set_one_feature(struct net_device *dev, void __user *useraddr, u32 ethcmd) { struct ethtool_value edata; netdev_features_t mask; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; mask = ethtool_get_feature_mask(ethcmd); mask &= dev->hw_features; if (!mask) return -EOPNOTSUPP; if (edata.data) dev->wanted_features |= mask; else dev->wanted_features &= ~mask; __netdev_update_features(dev); return 0; } #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_RX | \ NETIF_F_HW_VLAN_TX | NETIF_F_NTUPLE | NETIF_F_RXHASH) static u32 __ethtool_get_flags(struct net_device *dev) { u32 flags = 0; if (dev->features & NETIF_F_LRO) flags |= ETH_FLAG_LRO; if (dev->features & NETIF_F_HW_VLAN_RX) flags |= ETH_FLAG_RXVLAN; if (dev->features & NETIF_F_HW_VLAN_TX) flags |= ETH_FLAG_TXVLAN; if (dev->features & NETIF_F_NTUPLE) flags |= ETH_FLAG_NTUPLE; if (dev->features & NETIF_F_RXHASH) flags |= ETH_FLAG_RXHASH; return flags; } static int __ethtool_set_flags(struct net_device *dev, u32 data) { netdev_features_t features = 0, changed; if (data & ~ETH_ALL_FLAGS) return -EINVAL; if (data & ETH_FLAG_LRO) features |= NETIF_F_LRO; if (data & ETH_FLAG_RXVLAN) features |= NETIF_F_HW_VLAN_RX; if (data & ETH_FLAG_TXVLAN) features |= NETIF_F_HW_VLAN_TX; if (data & ETH_FLAG_NTUPLE) features |= NETIF_F_NTUPLE; if (data & ETH_FLAG_RXHASH) features |= NETIF_F_RXHASH; /* allow changing only bits set in hw_features */ changed = (features ^ dev->features) & ETH_ALL_FEATURES; if (changed & ~dev->hw_features) return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; dev->wanted_features = (dev->wanted_features & ~changed) | (features & changed); __netdev_update_features(dev); return 0; } int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { ASSERT_RTNL(); if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) return -EOPNOTSUPP; memset(cmd, 0, sizeof(struct ethtool_cmd)); cmd->cmd = ETHTOOL_GSET; return dev->ethtool_ops->get_settings(dev, cmd); } EXPORT_SYMBOL(__ethtool_get_settings); static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) { int err; struct ethtool_cmd cmd; err = __ethtool_get_settings(dev, &cmd); if (err < 0) return err; if (copy_to_user(useraddr, &cmd, sizeof(cmd))) return -EFAULT; return 0; } static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) { struct ethtool_cmd cmd; if (!dev->ethtool_ops->set_settings) return -EOPNOTSUPP; if (copy_from_user(&cmd, useraddr, sizeof(cmd))) return -EFAULT; return dev->ethtool_ops->set_settings(dev, &cmd); } static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr) { struct ethtool_drvinfo info; const struct ethtool_ops *ops = dev->ethtool_ops; memset(&info, 0, sizeof(info)); info.cmd = ETHTOOL_GDRVINFO; if (ops && ops->get_drvinfo) { ops->get_drvinfo(dev, &info); } else if (dev->dev.parent && dev->dev.parent->driver) { strlcpy(info.bus_info, dev_name(dev->dev.parent), sizeof(info.bus_info)); strlcpy(info.driver, dev->dev.parent->driver->name, sizeof(info.driver)); } else { return -EOPNOTSUPP; } /* * this method of obtaining string set info is deprecated; * Use ETHTOOL_GSSET_INFO instead. */ if (ops && ops->get_sset_count) { int rc; rc = ops->get_sset_count(dev, ETH_SS_TEST); if (rc >= 0) info.testinfo_len = rc; rc = ops->get_sset_count(dev, ETH_SS_STATS); if (rc >= 0) info.n_stats = rc; rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); if (rc >= 0) info.n_priv_flags = rc; } if (ops && ops->get_regs_len) info.regdump_len = ops->get_regs_len(dev); if (ops && ops->get_eeprom_len) info.eedump_len = ops->get_eeprom_len(dev); if (copy_to_user(useraddr, &info, sizeof(info))) return -EFAULT; return 0; } static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, void __user *useraddr) { struct ethtool_sset_info info; u64 sset_mask; int i, idx = 0, n_bits = 0, ret, rc; u32 *info_buf = NULL; if (copy_from_user(&info, useraddr, sizeof(info))) return -EFAULT; /* store copy of mask, because we zero struct later on */ sset_mask = info.sset_mask; if (!sset_mask) return 0; /* calculate size of return buffer */ n_bits = hweight64(sset_mask); memset(&info, 0, sizeof(info)); info.cmd = ETHTOOL_GSSET_INFO; info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER); if (!info_buf) return -ENOMEM; /* * fill return buffer based on input bitmask and successful * get_sset_count return */ for (i = 0; i < 64; i++) { if (!(sset_mask & (1ULL << i))) continue; rc = __ethtool_get_sset_count(dev, i); if (rc >= 0) { info.sset_mask |= (1ULL << i); info_buf[idx++] = rc; } } ret = -EFAULT; if (copy_to_user(useraddr, &info, sizeof(info))) goto out; useraddr += offsetof(struct ethtool_sset_info, data); if (copy_to_user(useraddr, info_buf, idx * sizeof(u32))) goto out; ret = 0; out: kfree(info_buf); return ret; } static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, u32 cmd, void __user *useraddr) { struct ethtool_rxnfc info; size_t info_size = sizeof(info); int rc; if (!dev->ethtool_ops->set_rxnfc) return -EOPNOTSUPP; /* struct ethtool_rxnfc was originally defined for * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data * members. User-space might still be using that * definition. */ if (cmd == ETHTOOL_SRXFH) info_size = (offsetof(struct ethtool_rxnfc, data) + sizeof(info.data)); if (copy_from_user(&info, useraddr, info_size)) return -EFAULT; rc = dev->ethtool_ops->set_rxnfc(dev, &info); if (rc) return rc; if (cmd == ETHTOOL_SRXCLSRLINS && copy_to_user(useraddr, &info, info_size)) return -EFAULT; return 0; } static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, u32 cmd, void __user *useraddr) { struct ethtool_rxnfc info; size_t info_size = sizeof(info); const struct ethtool_ops *ops = dev->ethtool_ops; int ret; void *rule_buf = NULL; if (!ops->get_rxnfc) return -EOPNOTSUPP; /* struct ethtool_rxnfc was originally defined for * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data * members. User-space might still be using that * definition. */ if (cmd == ETHTOOL_GRXFH) info_size = (offsetof(struct ethtool_rxnfc, data) + sizeof(info.data)); if (copy_from_user(&info, useraddr, info_size)) return -EFAULT; if (info.cmd == ETHTOOL_GRXCLSRLALL) { if (info.rule_cnt > 0) { if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) rule_buf = kzalloc(info.rule_cnt * sizeof(u32), GFP_USER); if (!rule_buf) return -ENOMEM; } } ret = ops->get_rxnfc(dev, &info, rule_buf); if (ret < 0) goto err_out; ret = -EFAULT; if (copy_to_user(useraddr, &info, info_size)) goto err_out; if (rule_buf) { useraddr += offsetof(struct ethtool_rxnfc, rule_locs); if (copy_to_user(useraddr, rule_buf, info.rule_cnt * sizeof(u32))) goto err_out; } ret = 0; err_out: kfree(rule_buf); return ret; } static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, void __user *useraddr) { u32 user_size, dev_size; u32 *indir; int ret; if (!dev->ethtool_ops->get_rxfh_indir_size || !dev->ethtool_ops->get_rxfh_indir) return -EOPNOTSUPP; dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); if (dev_size == 0) return -EOPNOTSUPP; if (copy_from_user(&user_size, useraddr + offsetof(struct ethtool_rxfh_indir, size), sizeof(user_size))) return -EFAULT; if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), &dev_size, sizeof(dev_size))) return -EFAULT; /* If the user buffer size is 0, this is just a query for the * device table size. Otherwise, if it's smaller than the * device table size it's an error. */ if (user_size < dev_size) return user_size == 0 ? 0 : -EINVAL; indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); if (!indir) return -ENOMEM; ret = dev->ethtool_ops->get_rxfh_indir(dev, indir); if (ret) goto out; if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, ring_index[0]), indir, dev_size * sizeof(indir[0]))) ret = -EFAULT; out: kfree(indir); return ret; } static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, void __user *useraddr) { struct ethtool_rxnfc rx_rings; u32 user_size, dev_size, i; u32 *indir; int ret; if (!dev->ethtool_ops->get_rxfh_indir_size || !dev->ethtool_ops->set_rxfh_indir || !dev->ethtool_ops->get_rxnfc) return -EOPNOTSUPP; dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); if (dev_size == 0) return -EOPNOTSUPP; if (copy_from_user(&user_size, useraddr + offsetof(struct ethtool_rxfh_indir, size), sizeof(user_size))) return -EFAULT; if (user_size != 0 && user_size != dev_size) return -EINVAL; indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); if (!indir) return -ENOMEM; rx_rings.cmd = ETHTOOL_GRXRINGS; ret = dev->ethtool_ops->get_rxnfc(dev, &rx_rings, NULL); if (ret) goto out; if (user_size == 0) { for (i = 0; i < dev_size; i++) indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); } else { if (copy_from_user(indir, useraddr + offsetof(struct ethtool_rxfh_indir, ring_index[0]), dev_size * sizeof(indir[0]))) { ret = -EFAULT; goto out; } /* Validate ring indices */ for (i = 0; i < dev_size; i++) { if (indir[i] >= rx_rings.data) { ret = -EINVAL; goto out; } } } ret = dev->ethtool_ops->set_rxfh_indir(dev, indir); out: kfree(indir); return ret; } /* * ethtool does not (or did not) set masks for flow parameters that are * not specified, so if both value and mask are 0 then this must be * treated as equivalent to a mask with all bits set. Implement that * here rather than in drivers. */ static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs) { struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec; struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec; if (fs->flow_type != TCP_V4_FLOW && fs->flow_type != UDP_V4_FLOW && fs->flow_type != SCTP_V4_FLOW) return; if (!(entry->ip4src | mask->ip4src)) mask->ip4src = htonl(0xffffffff); if (!(entry->ip4dst | mask->ip4dst)) mask->ip4dst = htonl(0xffffffff); if (!(entry->psrc | mask->psrc)) mask->psrc = htons(0xffff); if (!(entry->pdst | mask->pdst)) mask->pdst = htons(0xffff); if (!(entry->tos | mask->tos)) mask->tos = 0xff; if (!(fs->vlan_tag | fs->vlan_tag_mask)) fs->vlan_tag_mask = 0xffff; if (!(fs->data | fs->data_mask)) fs->data_mask = 0xffffffffffffffffULL; } static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev, void __user *useraddr) { struct ethtool_rx_ntuple cmd; const struct ethtool_ops *ops = dev->ethtool_ops; if (!ops->set_rx_ntuple) return -EOPNOTSUPP; if (!(dev->features & NETIF_F_NTUPLE)) return -EINVAL; if (copy_from_user(&cmd, useraddr, sizeof(cmd))) return -EFAULT; rx_ntuple_fix_masks(&cmd.fs); return ops->set_rx_ntuple(dev, &cmd); } static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) { struct ethtool_regs regs; const struct ethtool_ops *ops = dev->ethtool_ops; void *regbuf; int reglen, ret; if (!ops->get_regs || !ops->get_regs_len) return -EOPNOTSUPP; if (copy_from_user(®s, useraddr, sizeof(regs))) return -EFAULT; reglen = ops->get_regs_len(dev); if (regs.len > reglen) regs.len = reglen; regbuf = vzalloc(reglen); if (reglen && !regbuf) return -ENOMEM; ops->get_regs(dev, ®s, regbuf); ret = -EFAULT; if (copy_to_user(useraddr, ®s, sizeof(regs))) goto out; useraddr += offsetof(struct ethtool_regs, data); if (regbuf && copy_to_user(useraddr, regbuf, regs.len)) goto out; ret = 0; out: vfree(regbuf); return ret; } static int ethtool_reset(struct net_device *dev, char __user *useraddr) { struct ethtool_value reset; int ret; if (!dev->ethtool_ops->reset) return -EOPNOTSUPP; if (copy_from_user(&reset, useraddr, sizeof(reset))) return -EFAULT; ret = dev->ethtool_ops->reset(dev, &reset.data); if (ret) return ret; if (copy_to_user(useraddr, &reset, sizeof(reset))) return -EFAULT; return 0; } static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) { struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; if (!dev->ethtool_ops->get_wol) return -EOPNOTSUPP; dev->ethtool_ops->get_wol(dev, &wol); if (copy_to_user(useraddr, &wol, sizeof(wol))) return -EFAULT; return 0; } static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) { struct ethtool_wolinfo wol; if (!dev->ethtool_ops->set_wol) return -EOPNOTSUPP; if (copy_from_user(&wol, useraddr, sizeof(wol))) return -EFAULT; return dev->ethtool_ops->set_wol(dev, &wol); } static int ethtool_nway_reset(struct net_device *dev) { if (!dev->ethtool_ops->nway_reset) return -EOPNOTSUPP; return dev->ethtool_ops->nway_reset(dev); } static int ethtool_get_link(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; if (!dev->ethtool_ops->get_link) return -EOPNOTSUPP; edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev); if (copy_to_user(useraddr, &edata, sizeof(edata))) return -EFAULT; return 0; } static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) { struct ethtool_eeprom eeprom; const struct ethtool_ops *ops = dev->ethtool_ops; void __user *userbuf = useraddr + sizeof(eeprom); u32 bytes_remaining; u8 *data; int ret = 0; if (!ops->get_eeprom || !ops->get_eeprom_len) return -EOPNOTSUPP; if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) return -EFAULT; /* Check for wrap and zero */ if (eeprom.offset + eeprom.len <= eeprom.offset) return -EINVAL; /* Check for exceeding total eeprom len */ if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) return -EINVAL; data = kmalloc(PAGE_SIZE, GFP_USER); if (!data) return -ENOMEM; bytes_remaining = eeprom.len; while (bytes_remaining > 0) { eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); ret = ops->get_eeprom(dev, &eeprom, data); if (ret) break; if (copy_to_user(userbuf, data, eeprom.len)) { ret = -EFAULT; break; } userbuf += eeprom.len; eeprom.offset += eeprom.len; bytes_remaining -= eeprom.len; } eeprom.len = userbuf - (useraddr + sizeof(eeprom)); eeprom.offset -= eeprom.len; if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) ret = -EFAULT; kfree(data); return ret; } static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) { struct ethtool_eeprom eeprom; const struct ethtool_ops *ops = dev->ethtool_ops; void __user *userbuf = useraddr + sizeof(eeprom); u32 bytes_remaining; u8 *data; int ret = 0; if (!ops->set_eeprom || !ops->get_eeprom_len) return -EOPNOTSUPP; if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) return -EFAULT; /* Check for wrap and zero */ if (eeprom.offset + eeprom.len <= eeprom.offset) return -EINVAL; /* Check for exceeding total eeprom len */ if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) return -EINVAL; data = kmalloc(PAGE_SIZE, GFP_USER); if (!data) return -ENOMEM; bytes_remaining = eeprom.len; while (bytes_remaining > 0) { eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); if (copy_from_user(data, userbuf, eeprom.len)) { ret = -EFAULT; break; } ret = ops->set_eeprom(dev, &eeprom, data); if (ret) break; userbuf += eeprom.len; eeprom.offset += eeprom.len; bytes_remaining -= eeprom.len; } kfree(data); return ret; } static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr) { struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; if (!dev->ethtool_ops->get_coalesce) return -EOPNOTSUPP; dev->ethtool_ops->get_coalesce(dev, &coalesce); if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) return -EFAULT; return 0; } static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr) { struct ethtool_coalesce coalesce; if (!dev->ethtool_ops->set_coalesce) return -EOPNOTSUPP; if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) return -EFAULT; return dev->ethtool_ops->set_coalesce(dev, &coalesce); } static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) { struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; if (!dev->ethtool_ops->get_ringparam) return -EOPNOTSUPP; dev->ethtool_ops->get_ringparam(dev, &ringparam); if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) return -EFAULT; return 0; } static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) { struct ethtool_ringparam ringparam; if (!dev->ethtool_ops->set_ringparam) return -EOPNOTSUPP; if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) return -EFAULT; return dev->ethtool_ops->set_ringparam(dev, &ringparam); } static noinline_for_stack int ethtool_get_channels(struct net_device *dev, void __user *useraddr) { struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; if (!dev->ethtool_ops->get_channels) return -EOPNOTSUPP; dev->ethtool_ops->get_channels(dev, &channels); if (copy_to_user(useraddr, &channels, sizeof(channels))) return -EFAULT; return 0; } static noinline_for_stack int ethtool_set_channels(struct net_device *dev, void __user *useraddr) { struct ethtool_channels channels; if (!dev->ethtool_ops->set_channels) return -EOPNOTSUPP; if (copy_from_user(&channels, useraddr, sizeof(channels))) return -EFAULT; return dev->ethtool_ops->set_channels(dev, &channels); } static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) { struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM }; if (!dev->ethtool_ops->get_pauseparam) return -EOPNOTSUPP; dev->ethtool_ops->get_pauseparam(dev, &pauseparam); if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) return -EFAULT; return 0; } static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) { struct ethtool_pauseparam pauseparam; if (!dev->ethtool_ops->set_pauseparam) return -EOPNOTSUPP; if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) return -EFAULT; return dev->ethtool_ops->set_pauseparam(dev, &pauseparam); } static int ethtool_self_test(struct net_device *dev, char __user *useraddr) { struct ethtool_test test; const struct ethtool_ops *ops = dev->ethtool_ops; u64 *data; int ret, test_len; if (!ops->self_test || !ops->get_sset_count) return -EOPNOTSUPP; test_len = ops->get_sset_count(dev, ETH_SS_TEST); if (test_len < 0) return test_len; WARN_ON(test_len == 0); if (copy_from_user(&test, useraddr, sizeof(test))) return -EFAULT; test.len = test_len; data = kmalloc(test_len * sizeof(u64), GFP_USER); if (!data) return -ENOMEM; ops->self_test(dev, &test, data); ret = -EFAULT; if (copy_to_user(useraddr, &test, sizeof(test))) goto out; useraddr += sizeof(test); if (copy_to_user(useraddr, data, test.len * sizeof(u64))) goto out; ret = 0; out: kfree(data); return ret; } static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) { struct ethtool_gstrings gstrings; u8 *data; int ret; if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) return -EFAULT; ret = __ethtool_get_sset_count(dev, gstrings.string_set); if (ret < 0) return ret; gstrings.len = ret; data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER); if (!data) return -ENOMEM; __ethtool_get_strings(dev, gstrings.string_set, data); ret = -EFAULT; if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) goto out; useraddr += sizeof(gstrings); if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) goto out; ret = 0; out: kfree(data); return ret; } static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) { struct ethtool_value id; static bool busy; int rc; if (!dev->ethtool_ops->set_phys_id) return -EOPNOTSUPP; if (busy) return -EBUSY; if (copy_from_user(&id, useraddr, sizeof(id))) return -EFAULT; rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); if (rc < 0) return rc; /* Drop the RTNL lock while waiting, but prevent reentry or * removal of the device. */ busy = true; dev_hold(dev); rtnl_unlock(); if (rc == 0) { /* Driver will handle this itself */ schedule_timeout_interruptible( id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); } else { /* Driver expects to be called at twice the frequency in rc */ int n = rc * 2, i, interval = HZ / n; /* Count down seconds */ do { /* Count down iterations per second */ i = n; do { rtnl_lock(); rc = dev->ethtool_ops->set_phys_id(dev, (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); rtnl_unlock(); if (rc) break; schedule_timeout_interruptible(interval); } while (!signal_pending(current) && --i != 0); } while (!signal_pending(current) && (id.data == 0 || --id.data != 0)); } rtnl_lock(); dev_put(dev); busy = false; (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); return rc; } static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) { struct ethtool_stats stats; const struct ethtool_ops *ops = dev->ethtool_ops; u64 *data; int ret, n_stats; if (!ops->get_ethtool_stats || !ops->get_sset_count) return -EOPNOTSUPP; n_stats = ops->get_sset_count(dev, ETH_SS_STATS); if (n_stats < 0) return n_stats; WARN_ON(n_stats == 0); if (copy_from_user(&stats, useraddr, sizeof(stats))) return -EFAULT; stats.n_stats = n_stats; data = kmalloc(n_stats * sizeof(u64), GFP_USER); if (!data) return -ENOMEM; ops->get_ethtool_stats(dev, &stats, data); ret = -EFAULT; if (copy_to_user(useraddr, &stats, sizeof(stats))) goto out; useraddr += sizeof(stats); if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64))) goto out; ret = 0; out: kfree(data); return ret; } static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) { struct ethtool_perm_addr epaddr; if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) return -EFAULT; if (epaddr.size < dev->addr_len) return -ETOOSMALL; epaddr.size = dev->addr_len; if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) return -EFAULT; useraddr += sizeof(epaddr); if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) return -EFAULT; return 0; } static int ethtool_get_value(struct net_device *dev, char __user *useraddr, u32 cmd, u32 (*actor)(struct net_device *)) { struct ethtool_value edata = { .cmd = cmd }; if (!actor) return -EOPNOTSUPP; edata.data = actor(dev); if (copy_to_user(useraddr, &edata, sizeof(edata))) return -EFAULT; return 0; } static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, void (*actor)(struct net_device *, u32)) { struct ethtool_value edata; if (!actor) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; actor(dev, edata.data); return 0; } static int ethtool_set_value(struct net_device *dev, char __user *useraddr, int (*actor)(struct net_device *, u32)) { struct ethtool_value edata; if (!actor) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; return actor(dev, edata.data); } static noinline_for_stack int ethtool_flash_device(struct net_device *dev, char __user *useraddr) { struct ethtool_flash efl; if (copy_from_user(&efl, useraddr, sizeof(efl))) return -EFAULT; if (!dev->ethtool_ops->flash_device) return -EOPNOTSUPP; return dev->ethtool_ops->flash_device(dev, &efl); } static int ethtool_set_dump(struct net_device *dev, void __user *useraddr) { struct ethtool_dump dump; if (!dev->ethtool_ops->set_dump) return -EOPNOTSUPP; if (copy_from_user(&dump, useraddr, sizeof(dump))) return -EFAULT; return dev->ethtool_ops->set_dump(dev, &dump); } static int ethtool_get_dump_flag(struct net_device *dev, void __user *useraddr) { int ret; struct ethtool_dump dump; const struct ethtool_ops *ops = dev->ethtool_ops; if (!dev->ethtool_ops->get_dump_flag) return -EOPNOTSUPP; if (copy_from_user(&dump, useraddr, sizeof(dump))) return -EFAULT; ret = ops->get_dump_flag(dev, &dump); if (ret) return ret; if (copy_to_user(useraddr, &dump, sizeof(dump))) return -EFAULT; return 0; } static int ethtool_get_dump_data(struct net_device *dev, void __user *useraddr) { int ret; __u32 len; struct ethtool_dump dump, tmp; const struct ethtool_ops *ops = dev->ethtool_ops; void *data = NULL; if (!dev->ethtool_ops->get_dump_data || !dev->ethtool_ops->get_dump_flag) return -EOPNOTSUPP; if (copy_from_user(&dump, useraddr, sizeof(dump))) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.cmd = ETHTOOL_GET_DUMP_FLAG; ret = ops->get_dump_flag(dev, &tmp); if (ret) return ret; len = (tmp.len > dump.len) ? dump.len : tmp.len; if (!len) return -EFAULT; data = vzalloc(tmp.len); if (!data) return -ENOMEM; ret = ops->get_dump_data(dev, &dump, data); if (ret) goto out; if (copy_to_user(useraddr, &dump, sizeof(dump))) { ret = -EFAULT; goto out; } useraddr += offsetof(struct ethtool_dump, data); if (copy_to_user(useraddr, data, len)) ret = -EFAULT; out: vfree(data); return ret; } /* The main entry point in this file. Called from net/core/dev.c */ int dev_ethtool(struct net *net, struct ifreq *ifr) { struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); void __user *useraddr = ifr->ifr_data; u32 ethcmd; int rc; u32 old_features; if (!dev || !netif_device_present(dev)) return -ENODEV; if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) return -EFAULT; if (!dev->ethtool_ops) { /* ETHTOOL_GDRVINFO does not require any driver support. * It is also unprivileged and does not change anything, * so we can take a shortcut to it. */ if (ethcmd == ETHTOOL_GDRVINFO) return ethtool_get_drvinfo(dev, useraddr); else return -EOPNOTSUPP; } /* Allow some commands to be done by anyone */ switch (ethcmd) { case ETHTOOL_GSET: case ETHTOOL_GDRVINFO: case ETHTOOL_GMSGLVL: case ETHTOOL_GCOALESCE: case ETHTOOL_GRINGPARAM: case ETHTOOL_GPAUSEPARAM: case ETHTOOL_GRXCSUM: case ETHTOOL_GTXCSUM: case ETHTOOL_GSG: case ETHTOOL_GSTRINGS: case ETHTOOL_GTSO: case ETHTOOL_GPERMADDR: case ETHTOOL_GUFO: case ETHTOOL_GGSO: case ETHTOOL_GGRO: case ETHTOOL_GFLAGS: case ETHTOOL_GPFLAGS: case ETHTOOL_GRXFH: case ETHTOOL_GRXRINGS: case ETHTOOL_GRXCLSRLCNT: case ETHTOOL_GRXCLSRULE: case ETHTOOL_GRXCLSRLALL: case ETHTOOL_GFEATURES: break; default: if (!capable(CAP_NET_ADMIN)) return -EPERM; } if (dev->ethtool_ops->begin) { rc = dev->ethtool_ops->begin(dev); if (rc < 0) return rc; } old_features = dev->features; switch (ethcmd) { case ETHTOOL_GSET: rc = ethtool_get_settings(dev, useraddr); break; case ETHTOOL_SSET: rc = ethtool_set_settings(dev, useraddr); break; case ETHTOOL_GDRVINFO: rc = ethtool_get_drvinfo(dev, useraddr); break; case ETHTOOL_GREGS: rc = ethtool_get_regs(dev, useraddr); break; case ETHTOOL_GWOL: rc = ethtool_get_wol(dev, useraddr); break; case ETHTOOL_SWOL: rc = ethtool_set_wol(dev, useraddr); break; case ETHTOOL_GMSGLVL: rc = ethtool_get_value(dev, useraddr, ethcmd, dev->ethtool_ops->get_msglevel); break; case ETHTOOL_SMSGLVL: rc = ethtool_set_value_void(dev, useraddr, dev->ethtool_ops->set_msglevel); break; case ETHTOOL_NWAY_RST: rc = ethtool_nway_reset(dev); break; case ETHTOOL_GLINK: rc = ethtool_get_link(dev, useraddr); break; case ETHTOOL_GEEPROM: rc = ethtool_get_eeprom(dev, useraddr); break; case ETHTOOL_SEEPROM: rc = ethtool_set_eeprom(dev, useraddr); break; case ETHTOOL_GCOALESCE: rc = ethtool_get_coalesce(dev, useraddr); break; case ETHTOOL_SCOALESCE: rc = ethtool_set_coalesce(dev, useraddr); break; case ETHTOOL_GRINGPARAM: rc = ethtool_get_ringparam(dev, useraddr); break; case ETHTOOL_SRINGPARAM: rc = ethtool_set_ringparam(dev, useraddr); break; case ETHTOOL_GPAUSEPARAM: rc = ethtool_get_pauseparam(dev, useraddr); break; case ETHTOOL_SPAUSEPARAM: rc = ethtool_set_pauseparam(dev, useraddr); break; case ETHTOOL_TEST: rc = ethtool_self_test(dev, useraddr); break; case ETHTOOL_GSTRINGS: rc = ethtool_get_strings(dev, useraddr); break; case ETHTOOL_PHYS_ID: rc = ethtool_phys_id(dev, useraddr); break; case ETHTOOL_GSTATS: rc = ethtool_get_stats(dev, useraddr); break; case ETHTOOL_GPERMADDR: rc = ethtool_get_perm_addr(dev, useraddr); break; case ETHTOOL_GFLAGS: rc = ethtool_get_value(dev, useraddr, ethcmd, __ethtool_get_flags); break; case ETHTOOL_SFLAGS: rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); break; case ETHTOOL_GPFLAGS: rc = ethtool_get_value(dev, useraddr, ethcmd, dev->ethtool_ops->get_priv_flags); break; case ETHTOOL_SPFLAGS: rc = ethtool_set_value(dev, useraddr, dev->ethtool_ops->set_priv_flags); break; case ETHTOOL_GRXFH: case ETHTOOL_GRXRINGS: case ETHTOOL_GRXCLSRLCNT: case ETHTOOL_GRXCLSRULE: case ETHTOOL_GRXCLSRLALL: rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); break; case ETHTOOL_SRXFH: case ETHTOOL_SRXCLSRLDEL: case ETHTOOL_SRXCLSRLINS: rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); break; case ETHTOOL_FLASHDEV: rc = ethtool_flash_device(dev, useraddr); break; case ETHTOOL_RESET: rc = ethtool_reset(dev, useraddr); break; case ETHTOOL_SRXNTUPLE: rc = ethtool_set_rx_ntuple(dev, useraddr); break; case ETHTOOL_GSSET_INFO: rc = ethtool_get_sset_info(dev, useraddr); break; case ETHTOOL_GRXFHINDIR: rc = ethtool_get_rxfh_indir(dev, useraddr); break; case ETHTOOL_SRXFHINDIR: rc = ethtool_set_rxfh_indir(dev, useraddr); break; case ETHTOOL_GFEATURES: rc = ethtool_get_features(dev, useraddr); break; case ETHTOOL_SFEATURES: rc = ethtool_set_features(dev, useraddr); break; case ETHTOOL_GTXCSUM: case ETHTOOL_GRXCSUM: case ETHTOOL_GSG: case ETHTOOL_GTSO: case ETHTOOL_GUFO: case ETHTOOL_GGSO: case ETHTOOL_GGRO: rc = ethtool_get_one_feature(dev, useraddr, ethcmd); break; case ETHTOOL_STXCSUM: case ETHTOOL_SRXCSUM: case ETHTOOL_SSG: case ETHTOOL_STSO: case ETHTOOL_SUFO: case ETHTOOL_SGSO: case ETHTOOL_SGRO: rc = ethtool_set_one_feature(dev, useraddr, ethcmd); break; case ETHTOOL_GCHANNELS: rc = ethtool_get_channels(dev, useraddr); break; case ETHTOOL_SCHANNELS: rc = ethtool_set_channels(dev, useraddr); break; case ETHTOOL_SET_DUMP: rc = ethtool_set_dump(dev, useraddr); break; case ETHTOOL_GET_DUMP_FLAG: rc = ethtool_get_dump_flag(dev, useraddr); break; case ETHTOOL_GET_DUMP_DATA: rc = ethtool_get_dump_data(dev, useraddr); break; default: rc = -EOPNOTSUPP; } if (dev->ethtool_ops->complete) dev->ethtool_ops->complete(dev); if (old_features != dev->features) netdev_features_change(dev); return rc; }