/* * 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 /* * 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); u32 ethtool_op_get_rx_csum(struct net_device *dev) { return (dev->features & NETIF_F_ALL_CSUM) != 0; } EXPORT_SYMBOL(ethtool_op_get_rx_csum); u32 ethtool_op_get_tx_csum(struct net_device *dev) { return (dev->features & NETIF_F_ALL_CSUM) != 0; } EXPORT_SYMBOL(ethtool_op_get_tx_csum); int ethtool_op_set_tx_csum(struct net_device *dev, u32 data) { if (data) dev->features |= NETIF_F_IP_CSUM; else dev->features &= ~NETIF_F_IP_CSUM; return 0; } int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data) { if (data) dev->features |= NETIF_F_HW_CSUM; else dev->features &= ~NETIF_F_HW_CSUM; return 0; } EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum); int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data) { if (data) dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; else dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); return 0; } EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum); u32 ethtool_op_get_sg(struct net_device *dev) { return (dev->features & NETIF_F_SG) != 0; } EXPORT_SYMBOL(ethtool_op_get_sg); int ethtool_op_set_sg(struct net_device *dev, u32 data) { if (data) dev->features |= NETIF_F_SG; else dev->features &= ~NETIF_F_SG; return 0; } EXPORT_SYMBOL(ethtool_op_set_sg); u32 ethtool_op_get_tso(struct net_device *dev) { return (dev->features & NETIF_F_TSO) != 0; } EXPORT_SYMBOL(ethtool_op_get_tso); int ethtool_op_set_tso(struct net_device *dev, u32 data) { if (data) dev->features |= NETIF_F_TSO; else dev->features &= ~NETIF_F_TSO; return 0; } EXPORT_SYMBOL(ethtool_op_set_tso); u32 ethtool_op_get_ufo(struct net_device *dev) { return (dev->features & NETIF_F_UFO) != 0; } EXPORT_SYMBOL(ethtool_op_get_ufo); int ethtool_op_set_ufo(struct net_device *dev, u32 data) { if (data) dev->features |= NETIF_F_UFO; else dev->features &= ~NETIF_F_UFO; return 0; } EXPORT_SYMBOL(ethtool_op_set_ufo); /* the following list of flags are the same as their associated * NETIF_F_xxx values in include/linux/netdevice.h */ static const u32 flags_dup_features = (ETH_FLAG_LRO | ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH); u32 ethtool_op_get_flags(struct net_device *dev) { /* in the future, this function will probably contain additional * handling for flags which are not so easily handled * by a simple masking operation */ return dev->features & flags_dup_features; } EXPORT_SYMBOL(ethtool_op_get_flags); int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported) { if (data & ~supported) return -EINVAL; dev->features = ((dev->features & ~flags_dup_features) | (data & flags_dup_features)); return 0; } EXPORT_SYMBOL(ethtool_op_set_flags); void ethtool_ntuple_flush(struct net_device *dev) { struct ethtool_rx_ntuple_flow_spec_container *fsc, *f; list_for_each_entry_safe(fsc, f, &dev->ethtool_ntuple_list.list, list) { list_del(&fsc->list); kfree(fsc); } dev->ethtool_ntuple_list.count = 0; } EXPORT_SYMBOL(ethtool_ntuple_flush); /* Handlers for each ethtool command */ static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) { struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET }; int err; if (!dev->ethtool_ops->get_settings) return -EOPNOTSUPP; err = dev->ethtool_ops->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; const struct ethtool_ops *ops = dev->ethtool_ops; u64 sset_mask; int i, idx = 0, n_bits = 0, ret, rc; u32 *info_buf = NULL; if (!ops->get_sset_count) return -EOPNOTSUPP; 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 = ops->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); 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; return dev->ethtool_ops->set_rxnfc(dev, &info); } 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 = kmalloc(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) { struct ethtool_rxfh_indir *indir; u32 table_size; size_t full_size; int ret; if (!dev->ethtool_ops->get_rxfh_indir) return -EOPNOTSUPP; if (copy_from_user(&table_size, useraddr + offsetof(struct ethtool_rxfh_indir, size), sizeof(table_size))) return -EFAULT; if (table_size > (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index)) return -ENOMEM; full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size; indir = kmalloc(full_size, GFP_USER); if (!indir) return -ENOMEM; indir->cmd = ETHTOOL_GRXFHINDIR; indir->size = table_size; ret = dev->ethtool_ops->get_rxfh_indir(dev, indir); if (ret) goto out; if (copy_to_user(useraddr, indir, full_size)) 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_rxfh_indir *indir; u32 table_size; size_t full_size; int ret; if (!dev->ethtool_ops->set_rxfh_indir) return -EOPNOTSUPP; if (copy_from_user(&table_size, useraddr + offsetof(struct ethtool_rxfh_indir, size), sizeof(table_size))) return -EFAULT; if (table_size > (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index)) return -ENOMEM; full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size; indir = kmalloc(full_size, GFP_USER); if (!indir) return -ENOMEM; if (copy_from_user(indir, useraddr, full_size)) { ret = -EFAULT; goto out; } ret = dev->ethtool_ops->set_rxfh_indir(dev, indir); out: kfree(indir); return ret; } static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list, struct ethtool_rx_ntuple_flow_spec *spec, struct ethtool_rx_ntuple_flow_spec_container *fsc) { /* don't add filters forever */ if (list->count >= ETHTOOL_MAX_NTUPLE_LIST_ENTRY) { /* free the container */ kfree(fsc); return; } /* Copy the whole filter over */ fsc->fs.flow_type = spec->flow_type; memcpy(&fsc->fs.h_u, &spec->h_u, sizeof(spec->h_u)); memcpy(&fsc->fs.m_u, &spec->m_u, sizeof(spec->m_u)); fsc->fs.vlan_tag = spec->vlan_tag; fsc->fs.vlan_tag_mask = spec->vlan_tag_mask; fsc->fs.data = spec->data; fsc->fs.data_mask = spec->data_mask; fsc->fs.action = spec->action; /* add to the list */ list_add_tail_rcu(&fsc->list, &list->list); list->count++; } 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; struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL; int ret; if (!(dev->features & NETIF_F_NTUPLE)) return -EINVAL; if (copy_from_user(&cmd, useraddr, sizeof(cmd))) return -EFAULT; /* * Cache filter in dev struct for GET operation only if * the underlying driver doesn't have its own GET operation, and * only if the filter was added successfully. First make sure we * can allocate the filter, then continue if successful. */ if (!ops->get_rx_ntuple) { fsc = kmalloc(sizeof(*fsc), GFP_ATOMIC); if (!fsc) return -ENOMEM; } ret = ops->set_rx_ntuple(dev, &cmd); if (ret) { kfree(fsc); return ret; } if (!ops->get_rx_ntuple) __rx_ntuple_filter_add(&dev->ethtool_ntuple_list, &cmd.fs, fsc); return ret; } static int ethtool_get_rx_ntuple(struct net_device *dev, void __user *useraddr) { struct ethtool_gstrings gstrings; const struct ethtool_ops *ops = dev->ethtool_ops; struct ethtool_rx_ntuple_flow_spec_container *fsc; u8 *data; char *p; int ret, i, num_strings = 0; if (!ops->get_sset_count) return -EOPNOTSUPP; if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) return -EFAULT; ret = ops->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; if (ops->get_rx_ntuple) { /* driver-specific filter grab */ ret = ops->get_rx_ntuple(dev, gstrings.string_set, data); goto copy; } /* default ethtool filter grab */ i = 0; p = (char *)data; list_for_each_entry(fsc, &dev->ethtool_ntuple_list.list, list) { sprintf(p, "Filter %d:\n", i); p += ETH_GSTRING_LEN; num_strings++; switch (fsc->fs.flow_type) { case TCP_V4_FLOW: sprintf(p, "\tFlow Type: TCP\n"); p += ETH_GSTRING_LEN; num_strings++; break; case UDP_V4_FLOW: sprintf(p, "\tFlow Type: UDP\n"); p += ETH_GSTRING_LEN; num_strings++; break; case SCTP_V4_FLOW: sprintf(p, "\tFlow Type: SCTP\n"); p += ETH_GSTRING_LEN; num_strings++; break; case AH_ESP_V4_FLOW: sprintf(p, "\tFlow Type: AH ESP\n"); p += ETH_GSTRING_LEN; num_strings++; break; case ESP_V4_FLOW: sprintf(p, "\tFlow Type: ESP\n"); p += ETH_GSTRING_LEN; num_strings++; break; case IP_USER_FLOW: sprintf(p, "\tFlow Type: Raw IP\n"); p += ETH_GSTRING_LEN; num_strings++; break; case IPV4_FLOW: sprintf(p, "\tFlow Type: IPv4\n"); p += ETH_GSTRING_LEN; num_strings++; break; default: sprintf(p, "\tFlow Type: Unknown\n"); p += ETH_GSTRING_LEN; num_strings++; goto unknown_filter; } /* now the rest of the filters */ switch (fsc->fs.flow_type) { case TCP_V4_FLOW: case UDP_V4_FLOW: case SCTP_V4_FLOW: sprintf(p, "\tSrc IP addr: 0x%x\n", fsc->fs.h_u.tcp_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tSrc IP mask: 0x%x\n", fsc->fs.m_u.tcp_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP addr: 0x%x\n", fsc->fs.h_u.tcp_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP mask: 0x%x\n", fsc->fs.m_u.tcp_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tSrc Port: %d, mask: 0x%x\n", fsc->fs.h_u.tcp_ip4_spec.psrc, fsc->fs.m_u.tcp_ip4_spec.psrc); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest Port: %d, mask: 0x%x\n", fsc->fs.h_u.tcp_ip4_spec.pdst, fsc->fs.m_u.tcp_ip4_spec.pdst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tTOS: %d, mask: 0x%x\n", fsc->fs.h_u.tcp_ip4_spec.tos, fsc->fs.m_u.tcp_ip4_spec.tos); p += ETH_GSTRING_LEN; num_strings++; break; case AH_ESP_V4_FLOW: case ESP_V4_FLOW: sprintf(p, "\tSrc IP addr: 0x%x\n", fsc->fs.h_u.ah_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tSrc IP mask: 0x%x\n", fsc->fs.m_u.ah_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP addr: 0x%x\n", fsc->fs.h_u.ah_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP mask: 0x%x\n", fsc->fs.m_u.ah_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tSPI: %d, mask: 0x%x\n", fsc->fs.h_u.ah_ip4_spec.spi, fsc->fs.m_u.ah_ip4_spec.spi); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tTOS: %d, mask: 0x%x\n", fsc->fs.h_u.ah_ip4_spec.tos, fsc->fs.m_u.ah_ip4_spec.tos); p += ETH_GSTRING_LEN; num_strings++; break; case IP_USER_FLOW: sprintf(p, "\tSrc IP addr: 0x%x\n", fsc->fs.h_u.raw_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tSrc IP mask: 0x%x\n", fsc->fs.m_u.raw_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP addr: 0x%x\n", fsc->fs.h_u.raw_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP mask: 0x%x\n", fsc->fs.m_u.raw_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; break; case IPV4_FLOW: sprintf(p, "\tSrc IP addr: 0x%x\n", fsc->fs.h_u.usr_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tSrc IP mask: 0x%x\n", fsc->fs.m_u.usr_ip4_spec.ip4src); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP addr: 0x%x\n", fsc->fs.h_u.usr_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tDest IP mask: 0x%x\n", fsc->fs.m_u.usr_ip4_spec.ip4dst); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tL4 bytes: 0x%x, mask: 0x%x\n", fsc->fs.h_u.usr_ip4_spec.l4_4_bytes, fsc->fs.m_u.usr_ip4_spec.l4_4_bytes); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tTOS: %d, mask: 0x%x\n", fsc->fs.h_u.usr_ip4_spec.tos, fsc->fs.m_u.usr_ip4_spec.tos); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tIP Version: %d, mask: 0x%x\n", fsc->fs.h_u.usr_ip4_spec.ip_ver, fsc->fs.m_u.usr_ip4_spec.ip_ver); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tProtocol: %d, mask: 0x%x\n", fsc->fs.h_u.usr_ip4_spec.proto, fsc->fs.m_u.usr_ip4_spec.proto); p += ETH_GSTRING_LEN; num_strings++; break; } sprintf(p, "\tVLAN: %d, mask: 0x%x\n", fsc->fs.vlan_tag, fsc->fs.vlan_tag_mask); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tUser-defined: 0x%Lx\n", fsc->fs.data); p += ETH_GSTRING_LEN; num_strings++; sprintf(p, "\tUser-defined mask: 0x%Lx\n", fsc->fs.data_mask); p += ETH_GSTRING_LEN; num_strings++; if (fsc->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP) sprintf(p, "\tAction: Drop\n"); else sprintf(p, "\tAction: Direct to queue %d\n", fsc->fs.action); p += ETH_GSTRING_LEN; num_strings++; unknown_filter: i++; } copy: /* indicate to userspace how many strings we actually have */ gstrings.len = num_strings; 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_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 = kmalloc(reglen, GFP_USER); if (!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 (copy_to_user(useraddr, regbuf, regs.len)) goto out; ret = 0; out: kfree(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_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 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_set_sg(struct net_device *dev, u32 data) { int err; if (!data && dev->ethtool_ops->set_tso) { err = dev->ethtool_ops->set_tso(dev, 0); if (err) return err; } if (!data && dev->ethtool_ops->set_ufo) { err = dev->ethtool_ops->set_ufo(dev, 0); if (err) return err; } return dev->ethtool_ops->set_sg(dev, data); } static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; int err; if (!dev->ethtool_ops->set_tx_csum) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (!edata.data && dev->ethtool_ops->set_sg) { err = __ethtool_set_sg(dev, 0); if (err) return err; } return dev->ethtool_ops->set_tx_csum(dev, edata.data); } EXPORT_SYMBOL(ethtool_op_set_tx_csum); static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; if (!dev->ethtool_ops->set_rx_csum) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (!edata.data && dev->ethtool_ops->set_sg) dev->features &= ~NETIF_F_GRO; return dev->ethtool_ops->set_rx_csum(dev, edata.data); } static int ethtool_set_sg(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; if (!dev->ethtool_ops->set_sg) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (edata.data && !(dev->features & NETIF_F_ALL_CSUM)) return -EINVAL; return __ethtool_set_sg(dev, edata.data); } static int ethtool_set_tso(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; if (!dev->ethtool_ops->set_tso) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (edata.data && !(dev->features & NETIF_F_SG)) return -EINVAL; return dev->ethtool_ops->set_tso(dev, edata.data); } static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; if (!dev->ethtool_ops->set_ufo) return -EOPNOTSUPP; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (edata.data && !(dev->features & NETIF_F_SG)) return -EINVAL; if (edata.data && !(dev->features & NETIF_F_HW_CSUM)) return -EINVAL; return dev->ethtool_ops->set_ufo(dev, edata.data); } static int ethtool_get_gso(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata = { ETHTOOL_GGSO }; edata.data = dev->features & NETIF_F_GSO; if (copy_to_user(useraddr, &edata, sizeof(edata))) return -EFAULT; return 0; } static int ethtool_set_gso(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (edata.data) dev->features |= NETIF_F_GSO; else dev->features &= ~NETIF_F_GSO; return 0; } static int ethtool_get_gro(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata = { ETHTOOL_GGRO }; edata.data = dev->features & NETIF_F_GRO; if (copy_to_user(useraddr, &edata, sizeof(edata))) return -EFAULT; return 0; } static int ethtool_set_gro(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; if (copy_from_user(&edata, useraddr, sizeof(edata))) return -EFAULT; if (edata.data) { if (!dev->ethtool_ops->get_rx_csum || !dev->ethtool_ops->get_rx_csum(dev)) return -EINVAL; dev->features |= NETIF_F_GRO; } else dev->features &= ~NETIF_F_GRO; return 0; } 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; const struct ethtool_ops *ops = dev->ethtool_ops; u8 *data; int ret; if (!ops->get_strings || !ops->get_sset_count) return -EOPNOTSUPP; if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) return -EFAULT; ret = ops->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; ops->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; if (!dev->ethtool_ops->phys_id) return -EOPNOTSUPP; if (copy_from_user(&id, useraddr, sizeof(id))) return -EFAULT; return dev->ethtool_ops->phys_id(dev, id.data); } 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); } /* 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; unsigned long 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_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: 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_value(dev, useraddr, ethcmd, dev->ethtool_ops->get_link); 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_GRXCSUM: rc = ethtool_get_value(dev, useraddr, ethcmd, (dev->ethtool_ops->get_rx_csum ? dev->ethtool_ops->get_rx_csum : ethtool_op_get_rx_csum)); break; case ETHTOOL_SRXCSUM: rc = ethtool_set_rx_csum(dev, useraddr); break; case ETHTOOL_GTXCSUM: rc = ethtool_get_value(dev, useraddr, ethcmd, (dev->ethtool_ops->get_tx_csum ? dev->ethtool_ops->get_tx_csum : ethtool_op_get_tx_csum)); break; case ETHTOOL_STXCSUM: rc = ethtool_set_tx_csum(dev, useraddr); break; case ETHTOOL_GSG: rc = ethtool_get_value(dev, useraddr, ethcmd, (dev->ethtool_ops->get_sg ? dev->ethtool_ops->get_sg : ethtool_op_get_sg)); break; case ETHTOOL_SSG: rc = ethtool_set_sg(dev, useraddr); break; case ETHTOOL_GTSO: rc = ethtool_get_value(dev, useraddr, ethcmd, (dev->ethtool_ops->get_tso ? dev->ethtool_ops->get_tso : ethtool_op_get_tso)); break; case ETHTOOL_STSO: rc = ethtool_set_tso(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_GUFO: rc = ethtool_get_value(dev, useraddr, ethcmd, (dev->ethtool_ops->get_ufo ? dev->ethtool_ops->get_ufo : ethtool_op_get_ufo)); break; case ETHTOOL_SUFO: rc = ethtool_set_ufo(dev, useraddr); break; case ETHTOOL_GGSO: rc = ethtool_get_gso(dev, useraddr); break; case ETHTOOL_SGSO: rc = ethtool_set_gso(dev, useraddr); break; case ETHTOOL_GFLAGS: rc = ethtool_get_value(dev, useraddr, ethcmd, (dev->ethtool_ops->get_flags ? dev->ethtool_ops->get_flags : ethtool_op_get_flags)); break; case ETHTOOL_SFLAGS: rc = ethtool_set_value(dev, useraddr, dev->ethtool_ops->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_GGRO: rc = ethtool_get_gro(dev, useraddr); break; case ETHTOOL_SGRO: rc = ethtool_set_gro(dev, 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_GRXNTUPLE: rc = ethtool_get_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; default: rc = -EOPNOTSUPP; } if (dev->ethtool_ops->complete) dev->ethtool_ops->complete(dev); if (old_features != dev->features) netdev_features_change(dev); return rc; }