| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/kmod.h> |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/net_tstamp.h> |
| #include <linux/phylib_stubs.h> |
| #include <linux/wireless.h> |
| #include <linux/if_bridge.h> |
| #include <net/dsa_stubs.h> |
| #include <net/wext.h> |
| |
| #include "dev.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); |
| } |
| |
| /* |
| * 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 __user *uifc) |
| { |
| struct net_device *dev; |
| void __user *pos; |
| size_t size; |
| int len, total = 0, done; |
| |
| /* both the ifconf and the ifreq structures are slightly different */ |
| if (in_compat_syscall()) { |
| struct compat_ifconf ifc32; |
| |
| if (copy_from_user(&ifc32, uifc, sizeof(struct compat_ifconf))) |
| return -EFAULT; |
| |
| pos = compat_ptr(ifc32.ifcbuf); |
| len = ifc32.ifc_len; |
| size = sizeof(struct compat_ifreq); |
| } else { |
| struct ifconf ifc; |
| |
| if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| return -EFAULT; |
| |
| pos = ifc.ifc_buf; |
| len = ifc.ifc_len; |
| size = sizeof(struct ifreq); |
| } |
| |
| /* Loop over the interfaces, and write an info block for each. */ |
| rtnl_lock(); |
| for_each_netdev(net, dev) { |
| if (!pos) |
| done = inet_gifconf(dev, NULL, 0, size); |
| else |
| done = inet_gifconf(dev, pos + total, |
| len - total, size); |
| if (done < 0) { |
| rtnl_unlock(); |
| return -EFAULT; |
| } |
| total += done; |
| } |
| rtnl_unlock(); |
| |
| return put_user(total, &uifc->ifc_len); |
| } |
| |
| static int dev_getifmap(struct net_device *dev, struct ifreq *ifr) |
| { |
| struct ifmap *ifmap = &ifr->ifr_map; |
| |
| if (in_compat_syscall()) { |
| struct compat_ifmap *cifmap = (struct compat_ifmap *)ifmap; |
| |
| cifmap->mem_start = dev->mem_start; |
| cifmap->mem_end = dev->mem_end; |
| cifmap->base_addr = dev->base_addr; |
| cifmap->irq = dev->irq; |
| cifmap->dma = dev->dma; |
| cifmap->port = dev->if_port; |
| |
| return 0; |
| } |
| |
| ifmap->mem_start = dev->mem_start; |
| ifmap->mem_end = dev->mem_end; |
| ifmap->base_addr = dev->base_addr; |
| ifmap->irq = dev->irq; |
| ifmap->dma = dev->dma; |
| ifmap->port = dev->if_port; |
| |
| return 0; |
| } |
| |
| static int dev_setifmap(struct net_device *dev, struct ifreq *ifr) |
| { |
| struct compat_ifmap *cifmap = (struct compat_ifmap *)&ifr->ifr_map; |
| |
| if (!dev->netdev_ops->ndo_set_config) |
| return -EOPNOTSUPP; |
| |
| if (in_compat_syscall()) { |
| struct ifmap ifmap = { |
| .mem_start = cifmap->mem_start, |
| .mem_end = cifmap->mem_end, |
| .base_addr = cifmap->base_addr, |
| .irq = cifmap->irq, |
| .dma = cifmap->dma, |
| .port = cifmap->port, |
| }; |
| |
| return dev->netdev_ops->ndo_set_config(dev, &ifmap); |
| } |
| |
| return dev->netdev_ops->ndo_set_config(dev, &ifr->ifr_map); |
| } |
| |
| /* |
| * 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 SIOCGIFSLAVE: |
| err = -EINVAL; |
| break; |
| |
| case SIOCGIFMAP: |
| return dev_getifmap(dev, ifr); |
| |
| 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(const struct kernel_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 (cfg->flags & ~HWTSTAMP_FLAG_MASK) |
| 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; |
| } |
| |
| static int dev_eth_ioctl(struct net_device *dev, |
| struct ifreq *ifr, unsigned int cmd) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (!ops->ndo_eth_ioctl) |
| return -EOPNOTSUPP; |
| |
| if (!netif_device_present(dev)) |
| return -ENODEV; |
| |
| return ops->ndo_eth_ioctl(dev, ifr, cmd); |
| } |
| |
| /** |
| * dev_get_hwtstamp_phylib() - Get hardware timestamping settings of NIC |
| * or of attached phylib PHY |
| * @dev: Network device |
| * @cfg: Timestamping configuration structure |
| * |
| * Helper for calling the default hardware provider timestamping. |
| * |
| * Note: phy_mii_ioctl() only handles SIOCSHWTSTAMP (not SIOCGHWTSTAMP), and |
| * there only exists a phydev->mii_ts->hwtstamp() method. So this will return |
| * -EOPNOTSUPP for phylib for now, which is still more accurate than letting |
| * the netdev handle the GET request. |
| */ |
| static int dev_get_hwtstamp_phylib(struct net_device *dev, |
| struct kernel_hwtstamp_config *cfg) |
| { |
| if (phy_is_default_hwtstamp(dev->phydev)) |
| return phy_hwtstamp_get(dev->phydev, cfg); |
| |
| return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); |
| } |
| |
| static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| struct kernel_hwtstamp_config kernel_cfg = {}; |
| struct hwtstamp_config cfg; |
| int err; |
| |
| if (!ops->ndo_hwtstamp_get) |
| return dev_eth_ioctl(dev, ifr, SIOCGHWTSTAMP); /* legacy */ |
| |
| if (!netif_device_present(dev)) |
| return -ENODEV; |
| |
| kernel_cfg.ifr = ifr; |
| err = dev_get_hwtstamp_phylib(dev, &kernel_cfg); |
| if (err) |
| return err; |
| |
| /* If the request was resolved through an unconverted driver, omit |
| * the copy_to_user(), since the implementation has already done that |
| */ |
| if (!kernel_cfg.copied_to_user) { |
| hwtstamp_config_from_kernel(&cfg, &kernel_cfg); |
| |
| if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * dev_set_hwtstamp_phylib() - Change hardware timestamping of NIC |
| * or of attached phylib PHY |
| * @dev: Network device |
| * @cfg: Timestamping configuration structure |
| * @extack: Netlink extended ack message structure, for error reporting |
| * |
| * Helper for enforcing a common policy that phylib timestamping, if available, |
| * should take precedence in front of hardware timestamping provided by the |
| * netdev. If the netdev driver needs to perform specific actions even for PHY |
| * timestamping to work properly (a switch port must trap the timestamped |
| * frames and not forward them), it must set IFF_SEE_ALL_HWTSTAMP_REQUESTS in |
| * dev->priv_flags. |
| */ |
| int dev_set_hwtstamp_phylib(struct net_device *dev, |
| struct kernel_hwtstamp_config *cfg, |
| struct netlink_ext_ack *extack) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| bool phy_ts = phy_is_default_hwtstamp(dev->phydev); |
| struct kernel_hwtstamp_config old_cfg = {}; |
| bool changed = false; |
| int err; |
| |
| cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV; |
| |
| if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) { |
| err = ops->ndo_hwtstamp_get(dev, &old_cfg); |
| if (err) |
| return err; |
| } |
| |
| if (!phy_ts || (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) { |
| err = ops->ndo_hwtstamp_set(dev, cfg, extack); |
| if (err) { |
| if (extack->_msg) |
| netdev_err(dev, "%s\n", extack->_msg); |
| return err; |
| } |
| } |
| |
| if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) |
| changed = kernel_hwtstamp_config_changed(&old_cfg, cfg); |
| |
| if (phy_ts) { |
| err = phy_hwtstamp_set(dev->phydev, cfg, extack); |
| if (err) { |
| if (changed) |
| ops->ndo_hwtstamp_set(dev, &old_cfg, NULL); |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| struct kernel_hwtstamp_config kernel_cfg = {}; |
| struct netlink_ext_ack extack = {}; |
| struct hwtstamp_config cfg; |
| int err; |
| |
| if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) |
| return -EFAULT; |
| |
| hwtstamp_config_to_kernel(&kernel_cfg, &cfg); |
| kernel_cfg.ifr = ifr; |
| |
| err = net_hwtstamp_validate(&kernel_cfg); |
| if (err) |
| return err; |
| |
| err = dsa_conduit_hwtstamp_validate(dev, &kernel_cfg, &extack); |
| if (err) { |
| if (extack._msg) |
| netdev_err(dev, "%s\n", extack._msg); |
| return err; |
| } |
| |
| if (!ops->ndo_hwtstamp_set) |
| return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP); /* legacy */ |
| |
| if (!netif_device_present(dev)) |
| return -ENODEV; |
| |
| err = dev_set_hwtstamp_phylib(dev, &kernel_cfg, &extack); |
| if (err) |
| return err; |
| |
| /* The driver may have modified the configuration, so copy the |
| * updated version of it back to user space |
| */ |
| if (!kernel_cfg.copied_to_user) { |
| hwtstamp_config_from_kernel(&cfg, &kernel_cfg); |
| |
| if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int generic_hwtstamp_ioctl_lower(struct net_device *dev, int cmd, |
| struct kernel_hwtstamp_config *kernel_cfg) |
| { |
| struct ifreq ifrr; |
| int err; |
| |
| strscpy_pad(ifrr.ifr_name, dev->name, IFNAMSIZ); |
| ifrr.ifr_ifru = kernel_cfg->ifr->ifr_ifru; |
| |
| err = dev_eth_ioctl(dev, &ifrr, cmd); |
| if (err) |
| return err; |
| |
| kernel_cfg->ifr->ifr_ifru = ifrr.ifr_ifru; |
| kernel_cfg->copied_to_user = true; |
| |
| return 0; |
| } |
| |
| int generic_hwtstamp_get_lower(struct net_device *dev, |
| struct kernel_hwtstamp_config *kernel_cfg) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (!netif_device_present(dev)) |
| return -ENODEV; |
| |
| if (ops->ndo_hwtstamp_get) |
| return dev_get_hwtstamp_phylib(dev, kernel_cfg); |
| |
| /* Legacy path: unconverted lower driver */ |
| return generic_hwtstamp_ioctl_lower(dev, SIOCGHWTSTAMP, kernel_cfg); |
| } |
| EXPORT_SYMBOL(generic_hwtstamp_get_lower); |
| |
| int generic_hwtstamp_set_lower(struct net_device *dev, |
| struct kernel_hwtstamp_config *kernel_cfg, |
| struct netlink_ext_ack *extack) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (!netif_device_present(dev)) |
| return -ENODEV; |
| |
| if (ops->ndo_hwtstamp_set) |
| return dev_set_hwtstamp_phylib(dev, kernel_cfg, extack); |
| |
| /* Legacy path: unconverted lower driver */ |
| return generic_hwtstamp_ioctl_lower(dev, SIOCSHWTSTAMP, kernel_cfg); |
| } |
| EXPORT_SYMBOL(generic_hwtstamp_set_lower); |
| |
| static int dev_siocbond(struct net_device *dev, |
| struct ifreq *ifr, unsigned int cmd) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (ops->ndo_siocbond) { |
| if (netif_device_present(dev)) |
| return ops->ndo_siocbond(dev, ifr, cmd); |
| else |
| return -ENODEV; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, |
| void __user *data, unsigned int cmd) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (ops->ndo_siocdevprivate) { |
| if (netif_device_present(dev)) |
| return ops->ndo_siocdevprivate(dev, ifr, data, cmd); |
| else |
| return -ENODEV; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (ops->ndo_siocwandev) { |
| if (netif_device_present(dev)) |
| return ops->ndo_siocwandev(dev, ifs); |
| else |
| return -ENODEV; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| /* |
| * Perform the SIOCxIFxxx calls, inside rtnl_lock() |
| */ |
| static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, |
| unsigned int cmd) |
| { |
| int err; |
| struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); |
| const struct net_device_ops *ops; |
| netdevice_tracker dev_tracker; |
| |
| 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_user(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_min), |
| (size_t)dev->addr_len)); |
| call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| return 0; |
| |
| case SIOCSIFMAP: |
| return dev_setifmap(dev, ifr); |
| |
| 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 SIOCWANDEV: |
| return dev_siocwandev(dev, &ifr->ifr_settings); |
| |
| case SIOCBRADDIF: |
| case SIOCBRDELIF: |
| if (!netif_device_present(dev)) |
| return -ENODEV; |
| if (!netif_is_bridge_master(dev)) |
| return -EOPNOTSUPP; |
| netdev_hold(dev, &dev_tracker, GFP_KERNEL); |
| rtnl_unlock(); |
| err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL); |
| netdev_put(dev, &dev_tracker); |
| rtnl_lock(); |
| return err; |
| |
| case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: |
| return dev_siocdevprivate(dev, ifr, data, cmd); |
| |
| case SIOCSHWTSTAMP: |
| return dev_set_hwtstamp(dev, ifr); |
| |
| case SIOCGHWTSTAMP: |
| return dev_get_hwtstamp(dev, ifr); |
| |
| case SIOCGMIIPHY: |
| case SIOCGMIIREG: |
| case SIOCSMIIREG: |
| return dev_eth_ioctl(dev, ifr, cmd); |
| |
| case SIOCBONDENSLAVE: |
| case SIOCBONDRELEASE: |
| case SIOCBONDSETHWADDR: |
| case SIOCBONDSLAVEINFOQUERY: |
| case SIOCBONDINFOQUERY: |
| case SIOCBONDCHANGEACTIVE: |
| return dev_siocbond(dev, ifr, cmd); |
| |
| /* Unknown ioctl */ |
| default: |
| 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 |
| * @data: data exchanged with userspace |
| * @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, |
| void __user *data, 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) { |
| case SIOCGIFHWADDR: |
| dev_load(net, ifr->ifr_name); |
| ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name); |
| if (colon) |
| *colon = ':'; |
| return ret; |
| /* |
| * These ioctl calls: |
| * - can be done by all. |
| * - atomic and do not require locking. |
| * - return a value |
| */ |
| case SIOCGIFFLAGS: |
| case SIOCGIFMETRIC: |
| case SIOCGIFMTU: |
| 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); |
| ret = dev_ethtool(net, ifr, data); |
| 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, data, 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; |
| fallthrough; |
| /* |
| * 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; |
| fallthrough; |
| case SIOCBONDSLAVEINFOQUERY: |
| case SIOCBONDINFOQUERY: |
| dev_load(net, ifr->ifr_name); |
| rtnl_lock(); |
| ret = dev_ifsioc(net, ifr, data, cmd); |
| rtnl_unlock(); |
| if (need_copyout) |
| *need_copyout = false; |
| return ret; |
| |
| case SIOCGIFMEM: |
| /* Get the per device memory space. We can add this but |
| * currently do not support it */ |
| case SIOCSIFMEM: |
| /* Set the per device memory buffer space. |
| * Not applicable in our case */ |
| case SIOCSIFLINK: |
| return -ENOTTY; |
| |
| /* |
| * Unknown or private ioctl. |
| */ |
| default: |
| if (cmd == SIOCWANDEV || |
| cmd == SIOCGHWTSTAMP || |
| (cmd >= SIOCDEVPRIVATE && |
| cmd <= SIOCDEVPRIVATE + 15)) { |
| dev_load(net, ifr->ifr_name); |
| rtnl_lock(); |
| ret = dev_ifsioc(net, ifr, data, cmd); |
| rtnl_unlock(); |
| return ret; |
| } |
| return -ENOTTY; |
| } |
| } |