// SPDX-License-Identifier: GPL-2.0#include <linux/kmod.h>#include <linux/netdevice.h>#include <linux/etherdevice.h>#include <linux/rtnetlink.h>#include <linux/net_tstamp.h>#include <linux/wireless.h>#include <net/wext.h> /* * Map an interface index to its name (SIOCGIFNAME) */ /* * We need this ioctl for efficient implementation of the * if_indextoname() function required by the IPv6 API. Without * it, we would have to search all the interfaces to find a * match. --pb */ static int dev_ifname(struct net *net, struct ifreq *ifr){ ifr->ifr_name[IFNAMSIZ-1] = 0; return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);} static gifconf_func_t *gifconf_list[NPROTO]; /** * register_gifconf - register a SIOCGIF handler * @family: Address family * @gifconf: Function handler * * Register protocol dependent address dumping routines. The handler * that is passed must not be freed or reused until it has been replaced * by another handler. */int register_gifconf(unsigned int family, gifconf_func_t *gifconf){ if (family >= NPROTO) return -EINVAL; gifconf_list[family] = gifconf; return 0;}EXPORT_SYMBOL(register_gifconf); /* * Perform a SIOCGIFCONF call. This structure will change * size eventually, and there is nothing I can do about it. * Thus we will need a 'compatibility mode'. */ int dev_ifconf(struct net *net, struct ifconf *ifc, int size){ struct net_device *dev; char __user *pos; int len; int total; int i; /* * Fetch the caller's info block. */ pos = ifc->ifc_buf; len = ifc->ifc_len; /* * Loop over the interfaces, and write an info block for each. */ total = 0; for_each_netdev(net, dev) { for (i = 0; i < NPROTO; i++) { if (gifconf_list[i]) { int done; if (!pos) done = gifconf_list[i](dev, NULL, 0, size); else done = gifconf_list[i](dev, pos + total, len - total, size); if (done < 0) return -EFAULT; total += done; } } } /* * All done. Write the updated control block back to the caller. */ ifc->ifc_len = total; /* * Both BSD and Solaris return 0 here, so we do too. */ return 0;} /* * Perform the SIOCxIFxxx calls, inside rcu_read_lock() */static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd){ int err; struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); if (!dev) return -ENODEV; switch (cmd) { case SIOCGIFFLAGS: /* Get interface flags */ ifr->ifr_flags = (short) dev_get_flags(dev); return 0; case SIOCGIFMETRIC: /* Get the metric on the interface (currently unused) */ ifr->ifr_metric = 0; return 0; case SIOCGIFMTU: /* Get the MTU of a device */ ifr->ifr_mtu = dev->mtu; return 0; case SIOCGIFHWADDR: if (!dev->addr_len) memset(ifr->ifr_hwaddr.sa_data, 0, sizeof(ifr->ifr_hwaddr.sa_data)); else memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr, min(sizeof(ifr->ifr_hwaddr.sa_data), (size_t)dev->addr_len)); ifr->ifr_hwaddr.sa_family = dev->type; return 0; case SIOCGIFSLAVE: err = -EINVAL; break; case SIOCGIFMAP: ifr->ifr_map.mem_start = dev->mem_start; ifr->ifr_map.mem_end = dev->mem_end; ifr->ifr_map.base_addr = dev->base_addr; ifr->ifr_map.irq = dev->irq; ifr->ifr_map.dma = dev->dma; ifr->ifr_map.port = dev->if_port; return 0; case SIOCGIFINDEX: ifr->ifr_ifindex = dev->ifindex; return 0; case SIOCGIFTXQLEN: ifr->ifr_qlen = dev->tx_queue_len; return 0; default: /* dev_ioctl() should ensure this case * is never reached */ WARN_ON(1); err = -ENOTTY; break; } return err;} static int net_hwtstamp_validate(struct ifreq *ifr){ struct hwtstamp_config cfg; enum hwtstamp_tx_types tx_type; enum hwtstamp_rx_filters rx_filter; int tx_type_valid = 0; int rx_filter_valid = 0; if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) return -EFAULT; if (cfg.flags) /* reserved for future extensions */ return -EINVAL; tx_type = cfg.tx_type; rx_filter = cfg.rx_filter; switch (tx_type) { case HWTSTAMP_TX_OFF: case HWTSTAMP_TX_ON: case HWTSTAMP_TX_ONESTEP_SYNC: case HWTSTAMP_TX_ONESTEP_P2P: tx_type_valid = 1; break; case __HWTSTAMP_TX_CNT: /* not a real value */ break; } switch (rx_filter) { case HWTSTAMP_FILTER_NONE: case HWTSTAMP_FILTER_ALL: case HWTSTAMP_FILTER_SOME: case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_EVENT: case HWTSTAMP_FILTER_PTP_V2_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: case HWTSTAMP_FILTER_NTP_ALL: rx_filter_valid = 1; break; case __HWTSTAMP_FILTER_CNT: /* not a real value */ break; } if (!tx_type_valid || !rx_filter_valid) return -ERANGE; return 0;} /* * Perform the SIOCxIFxxx calls, inside rtnl_lock() */static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd){ int err; struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); const struct net_device_ops *ops; if (!dev) return -ENODEV; ops = dev->netdev_ops; switch (cmd) { case SIOCSIFFLAGS: /* Set interface flags */ return dev_change_flags(dev, ifr->ifr_flags, NULL); case SIOCSIFMETRIC: /* Set the metric on the interface (currently unused) */ return -EOPNOTSUPP; case SIOCSIFMTU: /* Set the MTU of a device */ return dev_set_mtu(dev, ifr->ifr_mtu); case SIOCSIFHWADDR: if (dev->addr_len > sizeof(struct sockaddr)) return -EINVAL; return dev_set_mac_address(dev, &ifr->ifr_hwaddr, NULL); case SIOCSIFHWBROADCAST: if (ifr->ifr_hwaddr.sa_family != dev->type) return -EINVAL; memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, min(sizeof(ifr->ifr_hwaddr.sa_data), (size_t)dev->addr_len)); call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); return 0; case SIOCSIFMAP: if (ops->ndo_set_config) { if (!netif_device_present(dev)) return -ENODEV; return ops->ndo_set_config(dev, &ifr->ifr_map); } return -EOPNOTSUPP; case SIOCADDMULTI: if (!ops->ndo_set_rx_mode || ifr->ifr_hwaddr.sa_family != AF_UNSPEC) return -EINVAL; if (!netif_device_present(dev)) return -ENODEV; return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); case SIOCDELMULTI: if (!ops->ndo_set_rx_mode || ifr->ifr_hwaddr.sa_family != AF_UNSPEC) return -EINVAL; if (!netif_device_present(dev)) return -ENODEV; return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); case SIOCSIFTXQLEN: if (ifr->ifr_qlen < 0) return -EINVAL; return dev_change_tx_queue_len(dev, ifr->ifr_qlen); case SIOCSIFNAME: ifr->ifr_newname[IFNAMSIZ-1] = '\0'; return dev_change_name(dev, ifr->ifr_newname); case SIOCSHWTSTAMP: err = net_hwtstamp_validate(ifr); if (err) return err; /* fall through */ /* * Unknown or private ioctl */ default: if ((cmd >= SIOCDEVPRIVATE && cmd <= SIOCDEVPRIVATE + 15) || cmd == SIOCBONDENSLAVE || cmd == SIOCBONDRELEASE || cmd == SIOCBONDSETHWADDR || cmd == SIOCBONDSLAVEINFOQUERY || cmd == SIOCBONDINFOQUERY || cmd == SIOCBONDCHANGEACTIVE || cmd == SIOCGMIIPHY || cmd == SIOCGMIIREG || cmd == SIOCSMIIREG || cmd == SIOCBRADDIF || cmd == SIOCBRDELIF || cmd == SIOCSHWTSTAMP || cmd == SIOCGHWTSTAMP || cmd == SIOCWANDEV) { err = -EOPNOTSUPP; if (ops->ndo_do_ioctl) { if (netif_device_present(dev)) err = ops->ndo_do_ioctl(dev, ifr, cmd); else err = -ENODEV; } } else err = -EINVAL; } return err;} /** * dev_load - load a network module * @net: the applicable net namespace * @name: name of interface * * If a network interface is not present and the process has suitable * privileges this function loads the module. If module loading is not * available in this kernel then it becomes a nop. */ void dev_load(struct net *net, const char *name){ struct net_device *dev; int no_module; rcu_read_lock(); dev = dev_get_by_name_rcu(net, name); rcu_read_unlock(); no_module = !dev; if (no_module && capable(CAP_NET_ADMIN)) no_module = request_module("netdev-%s", name); if (no_module && capable(CAP_SYS_MODULE)) request_module("%s", name);}EXPORT_SYMBOL(dev_load); /* * This function handles all "interface"-type I/O control requests. The actual * 'doing' part of this is dev_ifsioc above. */ /** * dev_ioctl - network device ioctl * @net: the applicable net namespace * @cmd: command to issue * @ifr: pointer to a struct ifreq in user space * @need_copyout: whether or not copy_to_user() should be called * * Issue ioctl functions to devices. This is normally called by the * user space syscall interfaces but can sometimes be useful for * other purposes. The return value is the return from the syscall if * positive or a negative errno code on error. */ int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_copyout){ int ret; char *colon; if (need_copyout) *need_copyout = true; if (cmd == SIOCGIFNAME) return dev_ifname(net, ifr); ifr->ifr_name[IFNAMSIZ-1] = 0; colon = strchr(ifr->ifr_name, ':'); if (colon) *colon = 0; /* * See which interface the caller is talking about. */ switch (cmd) { /* * These ioctl calls: * - can be done by all. * - atomic and do not require locking. * - return a value */ case SIOCGIFFLAGS: case SIOCGIFMETRIC: case SIOCGIFMTU: case SIOCGIFHWADDR: case SIOCGIFSLAVE: case SIOCGIFMAP: case SIOCGIFINDEX: case SIOCGIFTXQLEN: dev_load(net, ifr->ifr_name); rcu_read_lock(); ret = dev_ifsioc_locked(net, ifr, cmd); rcu_read_unlock(); if (colon) *colon = ':'; return ret; case SIOCETHTOOL: dev_load(net, ifr->ifr_name); rtnl_lock(); ret = dev_ethtool(net, ifr); rtnl_unlock(); if (colon) *colon = ':'; return ret; /* * These ioctl calls: * - require superuser power. * - require strict serialization. * - return a value */ case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSIFNAME: dev_load(net, ifr->ifr_name); if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) return -EPERM; rtnl_lock(); ret = dev_ifsioc(net, ifr, cmd); rtnl_unlock(); if (colon) *colon = ':'; return ret; /* * These ioctl calls: * - require superuser power. * - require strict serialization. * - do not return a value */ case SIOCSIFMAP: case SIOCSIFTXQLEN: if (!capable(CAP_NET_ADMIN)) return -EPERM; /* fall through */ /* * These ioctl calls: * - require local superuser power. * - require strict serialization. * - do not return a value */ case SIOCSIFFLAGS: case SIOCSIFMETRIC: case SIOCSIFMTU: case SIOCSIFHWADDR: case SIOCSIFSLAVE: case SIOCADDMULTI: case SIOCDELMULTI: case SIOCSIFHWBROADCAST: case SIOCSMIIREG: case SIOCBONDENSLAVE: case SIOCBONDRELEASE: case SIOCBONDSETHWADDR: case SIOCBONDCHANGEACTIVE: case SIOCBRADDIF: case SIOCBRDELIF: case SIOCSHWTSTAMP: if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) return -EPERM; /* fall through */ case SIOCBONDSLAVEINFOQUERY: case SIOCBONDINFOQUERY: dev_load(net, ifr->ifr_name); rtnl_lock(); ret = dev_ifsioc(net, ifr, cmd); rtnl_unlock(); if (need_copyout) *need_copyout = false; return ret;Lines 1–500 of 527. 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// SPDX-License-Identifier: GPL-2.0 #include <linux/kmod.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/rtnetlink.h> #include <linux/net_tstamp.h> #include <linux/wireless.h> #include <net/wext.h> /* * Map an interface index to its name (SIOCGIFNAME) */ /* * We need this ioctl for efficient implementation of the * if_indextoname() function required by the IPv6 API. Without * it, we would have to search all the interfaces to find a * match. --pb */ static int dev_ifname(struct net *net, struct ifreq *ifr) { ifr->ifr_name[IFNAMSIZ-1] = 0; return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex); } static gifconf_func_t *gifconf_list[NPROTO]; /** * register_gifconf - register a SIOCGIF handler * @family: Address family * @gifconf: Function handler * * Register protocol dependent address dumping routines. The handler * that is passed must not be freed or reused until it has been replaced * by another handler. */ int register_gifconf(unsigned int family, gifconf_func_t *gifconf) { if (family >= NPROTO) return -EINVAL; gifconf_list[family] = gifconf; return 0; } EXPORT_SYMBOL(register_gifconf); /* * Perform a SIOCGIFCONF call. This structure will change * size eventually, and there is nothing I can do about it. * Thus we will need a 'compatibility mode'. */ int dev_ifconf(struct net *net, struct ifconf *ifc, int size) { struct net_device *dev; char __user *pos; int len; int total; int i; /* * Fetch the caller's info block. */ pos = ifc->ifc_buf; len = ifc->ifc_len; /* * Loop over the interfaces, and write an info block for each. */ total = 0; for_each_netdev(net, dev) { for (i = 0; i < NPROTO; i++) { if (gifconf_list[i]) { int done; if (!pos) done = gifconf_list[i](dev, NULL, 0, size); else done = gifconf_list[i](dev, pos + total, len - total, size); if (done < 0) return -EFAULT; total += done; } } } /* * All done. Write the updated control block back to the caller. */ ifc->ifc_len = total; /* * Both BSD and Solaris return 0 here, so we do too. */ return 0; } /* * Perform the SIOCxIFxxx calls, inside rcu_read_lock() */ static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd) { int err; struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); if (!dev) return -ENODEV; switch (cmd) { case SIOCGIFFLAGS: /* Get interface flags */ ifr->ifr_flags = (short) dev_get_flags(dev); return 0; case SIOCGIFMETRIC: /* Get the metric on the interface (currently unused) */ ifr->ifr_metric = 0; return 0; case SIOCGIFMTU: /* Get the MTU of a device */ ifr->ifr_mtu = dev->mtu; return 0; case SIOCGIFHWADDR: if (!dev->addr_len) memset(ifr->ifr_hwaddr.sa_data, 0, sizeof(ifr->ifr_hwaddr.sa_data)); else memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr, min(sizeof(ifr->ifr_hwaddr.sa_data), (size_t)dev->addr_len)); ifr->ifr_hwaddr.sa_family = dev->type; return 0; case SIOCGIFSLAVE: err = -EINVAL; break; case SIOCGIFMAP: ifr->ifr_map.mem_start = dev->mem_start; ifr->ifr_map.mem_end = dev->mem_end; ifr->ifr_map.base_addr = dev->base_addr; ifr->ifr_map.irq = dev->irq; ifr->ifr_map.dma = dev->dma; ifr->ifr_map.port = dev->if_port; return 0; case SIOCGIFINDEX: ifr->ifr_ifindex = dev->ifindex; return 0; case SIOCGIFTXQLEN: ifr->ifr_qlen = dev->tx_queue_len; return 0; default: /* dev_ioctl() should ensure this case * is never reached */ WARN_ON(1); err = -ENOTTY; break; } return err; } static int net_hwtstamp_validate(struct ifreq *ifr) { struct hwtstamp_config cfg; enum hwtstamp_tx_types tx_type; enum hwtstamp_rx_filters rx_filter; int tx_type_valid = 0; int rx_filter_valid = 0; if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) return -EFAULT; if (cfg.flags) /* reserved for future extensions */ return -EINVAL; tx_type = cfg.tx_type; rx_filter = cfg.rx_filter; switch (tx_type) { case HWTSTAMP_TX_OFF: case HWTSTAMP_TX_ON: case HWTSTAMP_TX_ONESTEP_SYNC: case HWTSTAMP_TX_ONESTEP_P2P: tx_type_valid = 1; break; case __HWTSTAMP_TX_CNT: /* not a real value */ break; } switch (rx_filter) { case HWTSTAMP_FILTER_NONE: case HWTSTAMP_FILTER_ALL: case HWTSTAMP_FILTER_SOME: case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_EVENT: case HWTSTAMP_FILTER_PTP_V2_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: case HWTSTAMP_FILTER_NTP_ALL: rx_filter_valid = 1; break; case __HWTSTAMP_FILTER_CNT: /* not a real value */ break; } if (!tx_type_valid || !rx_filter_valid) return -ERANGE; return 0; } /* * Perform the SIOCxIFxxx calls, inside rtnl_lock() */ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd) { int err; struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); const struct net_device_ops *ops; if (!dev) return -ENODEV; ops = dev->netdev_ops; switch (cmd) { case SIOCSIFFLAGS: /* Set interface flags */ return dev_change_flags(dev, ifr->ifr_flags, NULL); case SIOCSIFMETRIC: /* Set the metric on the interface (currently unused) */ return -EOPNOTSUPP; case SIOCSIFMTU: /* Set the MTU of a device */ return dev_set_mtu(dev, ifr->ifr_mtu); case SIOCSIFHWADDR: if (dev->addr_len > sizeof(struct sockaddr)) return -EINVAL; return dev_set_mac_address(dev, &ifr->ifr_hwaddr, NULL); case SIOCSIFHWBROADCAST: if (ifr->ifr_hwaddr.sa_family != dev->type) return -EINVAL; memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, min(sizeof(ifr->ifr_hwaddr.sa_data), (size_t)dev->addr_len)); call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); return 0; case SIOCSIFMAP: if (ops->ndo_set_config) { if (!netif_device_present(dev)) return -ENODEV; return ops->ndo_set_config(dev, &ifr->ifr_map); } return -EOPNOTSUPP; case SIOCADDMULTI: if (!ops->ndo_set_rx_mode || ifr->ifr_hwaddr.sa_family != AF_UNSPEC) return -EINVAL; if (!netif_device_present(dev)) return -ENODEV; return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); case SIOCDELMULTI: if (!ops->ndo_set_rx_mode || ifr->ifr_hwaddr.sa_family != AF_UNSPEC) return -EINVAL; if (!netif_device_present(dev)) return -ENODEV; return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); case SIOCSIFTXQLEN: if (ifr->ifr_qlen < 0) return -EINVAL; return dev_change_tx_queue_len(dev, ifr->ifr_qlen); case SIOCSIFNAME: ifr->ifr_newname[IFNAMSIZ-1] = '\0'; return dev_change_name(dev, ifr->ifr_newname); case SIOCSHWTSTAMP: err = net_hwtstamp_validate(ifr); if (err) return err; /* fall through */ /* * Unknown or private ioctl */ default: if ((cmd >= SIOCDEVPRIVATE && cmd <= SIOCDEVPRIVATE + 15) || cmd == SIOCBONDENSLAVE || cmd == SIOCBONDRELEASE || cmd == SIOCBONDSETHWADDR || cmd == SIOCBONDSLAVEINFOQUERY || cmd == SIOCBONDINFOQUERY || cmd == SIOCBONDCHANGEACTIVE || cmd == SIOCGMIIPHY || cmd == SIOCGMIIREG || cmd == SIOCSMIIREG || cmd == SIOCBRADDIF || cmd == SIOCBRDELIF || cmd == SIOCSHWTSTAMP || cmd == SIOCGHWTSTAMP || cmd == SIOCWANDEV) { err = -EOPNOTSUPP; if (ops->ndo_do_ioctl) { if (netif_device_present(dev)) err = ops->ndo_do_ioctl(dev, ifr, cmd); else err = -ENODEV; } } else err = -EINVAL; } return err; } /** * dev_load - load a network module * @net: the applicable net namespace * @name: name of interface * * If a network interface is not present and the process has suitable * privileges this function loads the module. If module loading is not * available in this kernel then it becomes a nop. */ void dev_load(struct net *net, const char *name) { struct net_device *dev; int no_module; rcu_read_lock(); dev = dev_get_by_name_rcu(net, name); rcu_read_unlock(); no_module = !dev; if (no_module && capable(CAP_NET_ADMIN)) no_module = request_module("netdev-%s", name); if (no_module && capable(CAP_SYS_MODULE)) request_module("%s", name); } EXPORT_SYMBOL(dev_load); /* * This function handles all "interface"-type I/O control requests. The actual * 'doing' part of this is dev_ifsioc above. */ /** * dev_ioctl - network device ioctl * @net: the applicable net namespace * @cmd: command to issue * @ifr: pointer to a struct ifreq in user space * @need_copyout: whether or not copy_to_user() should be called * * Issue ioctl functions to devices. This is normally called by the * user space syscall interfaces but can sometimes be useful for * other purposes. The return value is the return from the syscall if * positive or a negative errno code on error. */ int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_copyout) { int ret; char *colon; if (need_copyout) *need_copyout = true; if (cmd == SIOCGIFNAME) return dev_ifname(net, ifr); ifr->ifr_name[IFNAMSIZ-1] = 0; colon = strchr(ifr->ifr_name, ':'); if (colon) *colon = 0; /* * See which interface the caller is talking about. */ switch (cmd) { /* * These ioctl calls: * - can be done by all. * - atomic and do not require locking. * - return a value */ case SIOCGIFFLAGS: case SIOCGIFMETRIC: case SIOCGIFMTU: case SIOCGIFHWADDR: case SIOCGIFSLAVE: case SIOCGIFMAP: case SIOCGIFINDEX: case SIOCGIFTXQLEN: dev_load(net, ifr->ifr_name); rcu_read_lock(); ret = dev_ifsioc_locked(net, ifr, cmd); rcu_read_unlock(); if (colon) *colon = ':'; return ret; case SIOCETHTOOL: dev_load(net, ifr->ifr_name); rtnl_lock(); ret = dev_ethtool(net, ifr); rtnl_unlock(); if (colon) *colon = ':'; return ret; /* * These ioctl calls: * - require superuser power. * - require strict serialization. * - return a value */ case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSIFNAME: dev_load(net, ifr->ifr_name); if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) return -EPERM; rtnl_lock(); ret = dev_ifsioc(net, ifr, cmd); rtnl_unlock(); if (colon) *colon = ':'; return ret; /* * These ioctl calls: * - require superuser power. * - require strict serialization. * - do not return a value */ case SIOCSIFMAP: case SIOCSIFTXQLEN: if (!capable(CAP_NET_ADMIN)) return -EPERM; /* fall through */ /* * These ioctl calls: * - require local superuser power. * - require strict serialization. * - do not return a value */ case SIOCSIFFLAGS: case SIOCSIFMETRIC: case SIOCSIFMTU: case SIOCSIFHWADDR: case SIOCSIFSLAVE: case SIOCADDMULTI: case SIOCDELMULTI: case SIOCSIFHWBROADCAST: case SIOCSMIIREG: case SIOCBONDENSLAVE: case SIOCBONDRELEASE: case SIOCBONDSETHWADDR: case SIOCBONDCHANGEACTIVE: case SIOCBRADDIF: case SIOCBRDELIF: case SIOCSHWTSTAMP: if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) return -EPERM; /* fall through */ case SIOCBONDSLAVEINFOQUERY: case SIOCBONDINFOQUERY: dev_load(net, ifr->ifr_name); rtnl_lock(); ret = dev_ifsioc(net, ifr, cmd); rtnl_unlock(); if (need_copyout) *need_copyout = false; return ret;