[linux-2.6-block.git] / net / core / dev_ioctl.c

// 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/wireless.h>
#include <linux/if_bridge.h>
#include <net/dsa.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);
}

static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr)
{
	return dev_eth_ioctl(dev, ifr, SIOCGHWTSTAMP);
}

static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr)
{
	struct netdev_notifier_hwtstamp_info info = {
		.info.dev = dev,
	};
	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);

	err = net_hwtstamp_validate(&kernel_cfg);
	if (err)
		return err;

	info.info.extack = &extack;
	info.config = &kernel_cfg;

	err = call_netdevice_notifiers_info(NETDEV_PRE_CHANGE_HWTSTAMP,
					    &info.info);
	err = notifier_to_errno(err);
	if (err) {
		if (extack._msg)
			netdev_err(dev, "%s\n", extack._msg);
		return err;
	}

	return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP);
}

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;
	}
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
96b45cbd CW	2	#include <linux/kmod.h>
96b45cbd CW	3	#include <linux/netdevice.h>
b0e99d03	4	#include <linux/inetdevice.h>
96b45cbd CW	5	#include <linux/etherdevice.h>
	6	#include <linux/rtnetlink.h>
	7	#include <linux/net_tstamp.h>
	8	#include <linux/wireless.h>
ad2f99ae	9	#include <linux/if_bridge.h>
3369afba	10	#include <net/dsa.h>
96b45cbd CW	11	#include <net/wext.h>
96b45cbd CW	12
6264f58c JK	13	#include "dev.h"
6264f58c JK	14
96b45cbd CW	15	/*
	16	* Map an interface index to its name (SIOCGIFNAME)
	17	*/
	18
	19	/*
	20	* We need this ioctl for efficient implementation of the
	21	* if_indextoname() function required by the IPv6 API. Without
	22	* it, we would have to search all the interfaces to find a
	23	* match. --pb
	24	*/
	25
44c02a2c	26	static int dev_ifname(struct net net, struct ifreq ifr)
96b45cbd	27	{
44c02a2c AV	28	ifr->ifr_name[IFNAMSIZ-1] = 0;
44c02a2c AV	29	return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
96b45cbd CW	30	}
96b45cbd CW	31
96b45cbd CW	32	/*
	33	* Perform a SIOCGIFCONF call. This structure will change
	34	* size eventually, and there is nothing I can do about it.
	35	* Thus we will need a 'compatibility mode'.
	36	*/
876f0bf9	37	int dev_ifconf(struct net net, struct ifconf __user uifc)
96b45cbd	38	{
96b45cbd	39	struct net_device *dev;
876f0bf9 AB	40	void __user *pos;
	41	size_t size;
	42	int len, total = 0, done;
96b45cbd	43
876f0bf9 AB	44	/* both the ifconf and the ifreq structures are slightly different */
	45	if (in_compat_syscall()) {
	46	struct compat_ifconf ifc32;
96b45cbd	47
876f0bf9 AB	48	if (copy_from_user(&ifc32, uifc, sizeof(struct compat_ifconf)))
876f0bf9 AB	49	return -EFAULT;
96b45cbd	50
876f0bf9 AB	51	pos = compat_ptr(ifc32.ifcbuf);
	52	len = ifc32.ifc_len;
	53	size = sizeof(struct compat_ifreq);
	54	} else {
	55	struct ifconf ifc;
	56
	57	if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
	58	return -EFAULT;
96b45cbd	59
876f0bf9 AB	60	pos = ifc.ifc_buf;
	61	len = ifc.ifc_len;
	62	size = sizeof(struct ifreq);
	63	}
	64
	65	/* Loop over the interfaces, and write an info block for each. */
	66	rtnl_lock();
96b45cbd	67	for_each_netdev(net, dev) {
b0e99d03 AB	68	if (!pos)
	69	done = inet_gifconf(dev, NULL, 0, size);
	70	else
	71	done = inet_gifconf(dev, pos + total,
	72	len - total, size);
876f0bf9 AB	73	if (done < 0) {
876f0bf9 AB	74	rtnl_unlock();
b0e99d03	75	return -EFAULT;
876f0bf9	76	}
b0e99d03	77	total += done;
96b45cbd	78	}
876f0bf9	79	rtnl_unlock();
96b45cbd	80
876f0bf9	81	return put_user(total, &uifc->ifc_len);
96b45cbd CW	82	}
96b45cbd CW	83
709566d7 AB	84	static int dev_getifmap(struct net_device dev, struct ifreq ifr)
	85	{
	86	struct ifmap *ifmap = &ifr->ifr_map;
	87
	88	if (in_compat_syscall()) {
	89	struct compat_ifmap cifmap = (struct compat_ifmap )ifmap;
	90
	91	cifmap->mem_start = dev->mem_start;
	92	cifmap->mem_end = dev->mem_end;
	93	cifmap->base_addr = dev->base_addr;
	94	cifmap->irq = dev->irq;
	95	cifmap->dma = dev->dma;
	96	cifmap->port = dev->if_port;
	97
	98	return 0;
	99	}
	100
	101	ifmap->mem_start = dev->mem_start;
	102	ifmap->mem_end = dev->mem_end;
	103	ifmap->base_addr = dev->base_addr;
	104	ifmap->irq = dev->irq;
	105	ifmap->dma = dev->dma;
	106	ifmap->port = dev->if_port;
	107
	108	return 0;
	109	}
	110
	111	static int dev_setifmap(struct net_device dev, struct ifreq ifr)
	112	{
	113	struct compat_ifmap cifmap = (struct compat_ifmap )&ifr->ifr_map;
	114
	115	if (!dev->netdev_ops->ndo_set_config)
	116	return -EOPNOTSUPP;
	117
	118	if (in_compat_syscall()) {
	119	struct ifmap ifmap = {
	120	.mem_start = cifmap->mem_start,
	121	.mem_end = cifmap->mem_end,
	122	.base_addr = cifmap->base_addr,
	123	.irq = cifmap->irq,
	124	.dma = cifmap->dma,
	125	.port = cifmap->port,
	126	};
	127
	128	return dev->netdev_ops->ndo_set_config(dev, &ifmap);
	129	}
	130
	131	return dev->netdev_ops->ndo_set_config(dev, &ifr->ifr_map);
	132	}
	133
96b45cbd CW	134	/*
	135	* Perform the SIOCxIFxxx calls, inside rcu_read_lock()
	136	*/
	137	static int dev_ifsioc_locked(struct net net, struct ifreq ifr, unsigned int cmd)
	138	{
	139	int err;
	140	struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
	141
	142	if (!dev)
	143	return -ENODEV;
	144
	145	switch (cmd) {
	146	case SIOCGIFFLAGS: /* Get interface flags */
	147	ifr->ifr_flags = (short) dev_get_flags(dev);
	148	return 0;
	149
	150	case SIOCGIFMETRIC: /* Get the metric on the interface
	151	(currently unused) */
	152	ifr->ifr_metric = 0;
	153	return 0;
	154
	155	case SIOCGIFMTU: /* Get the MTU of a device */
	156	ifr->ifr_mtu = dev->mtu;
	157	return 0;
	158
96b45cbd CW	159	case SIOCGIFSLAVE:
	160	err = -EINVAL;
	161	break;
	162
	163	case SIOCGIFMAP:
709566d7	164	return dev_getifmap(dev, ifr);
96b45cbd CW	165
	166	case SIOCGIFINDEX:
	167	ifr->ifr_ifindex = dev->ifindex;
	168	return 0;
	169
	170	case SIOCGIFTXQLEN:
	171	ifr->ifr_qlen = dev->tx_queue_len;
	172	return 0;
	173
	174	default:
	175	/* dev_ioctl() should ensure this case
	176	* is never reached
	177	*/
	178	WARN_ON(1);
	179	err = -ENOTTY;
	180	break;
	181
	182	}
	183	return err;
	184	}
	185
c4bffeaa	186	static int net_hwtstamp_validate(const struct kernel_hwtstamp_config *cfg)
96b45cbd	187	{
96b45cbd CW	188	enum hwtstamp_tx_types tx_type;
	189	enum hwtstamp_rx_filters rx_filter;
	190	int tx_type_valid = 0;
	191	int rx_filter_valid = 0;
	192
d5d5fd8f	193	if (cfg->flags & ~HWTSTAMP_FLAG_MASK)
96b45cbd CW	194	return -EINVAL;
96b45cbd CW	195
d5d5fd8f VO	196	tx_type = cfg->tx_type;
d5d5fd8f VO	197	rx_filter = cfg->rx_filter;
96b45cbd CW	198
	199	switch (tx_type) {
	200	case HWTSTAMP_TX_OFF:
	201	case HWTSTAMP_TX_ON:
	202	case HWTSTAMP_TX_ONESTEP_SYNC:
b6fd7b96	203	case HWTSTAMP_TX_ONESTEP_P2P:
96b45cbd CW	204	tx_type_valid = 1;
96b45cbd CW	205	break;
f76510b4 MK	206	case __HWTSTAMP_TX_CNT:
	207	/* not a real value */
	208	break;
96b45cbd CW	209	}
	210
	211	switch (rx_filter) {
	212	case HWTSTAMP_FILTER_NONE:
	213	case HWTSTAMP_FILTER_ALL:
	214	case HWTSTAMP_FILTER_SOME:
	215	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
	216	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
	217	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
	218	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
	219	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
	220	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
	221	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
	222	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
	223	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
	224	case HWTSTAMP_FILTER_PTP_V2_EVENT:
	225	case HWTSTAMP_FILTER_PTP_V2_SYNC:
	226	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
b8210a9e	227	case HWTSTAMP_FILTER_NTP_ALL:
e3412575	228	rx_filter_valid = 1;
b8210a9e	229	break;
f76510b4 MK	230	case __HWTSTAMP_FILTER_CNT:
	231	/* not a real value */
	232	break;
96b45cbd CW	233	}
	234
	235	if (!tx_type_valid \|\| !rx_filter_valid)
	236	return -ERANGE;
	237
	238	return 0;
	239	}
	240
a7605370 AB	241	static int dev_eth_ioctl(struct net_device *dev,
a7605370 AB	242	struct ifreq *ifr, unsigned int cmd)
aad74d84 FF	243	{
aad74d84 FF	244	const struct net_device_ops *ops = dev->netdev_ops;
4ee58e1e VO	245
	246	if (!ops->ndo_eth_ioctl)
	247	return -EOPNOTSUPP;
	248
	249	if (!netif_device_present(dev))
	250	return -ENODEV;
	251
	252	return ops->ndo_eth_ioctl(dev, ifr, cmd);
	253	}
	254
	255	static int dev_get_hwtstamp(struct net_device dev, struct ifreq ifr)
	256	{
	257	return dev_eth_ioctl(dev, ifr, SIOCGHWTSTAMP);
	258	}
	259
	260	static int dev_set_hwtstamp(struct net_device dev, struct ifreq ifr)
	261	{
88c0a6b5 VO	262	struct netdev_notifier_hwtstamp_info info = {
	263	.info.dev = dev,
	264	};
c4bffeaa	265	struct kernel_hwtstamp_config kernel_cfg;
88c0a6b5	266	struct netlink_ext_ack extack = {};
d5d5fd8f	267	struct hwtstamp_config cfg;
1ca47431	268	int err;
aad74d84	269
d5d5fd8f VO	270	if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
	271	return -EFAULT;
	272
c4bffeaa VO	273	hwtstamp_config_to_kernel(&kernel_cfg, &cfg);
	274
	275	err = net_hwtstamp_validate(&kernel_cfg);
4ee58e1e	276	if (err)
3369afba FF	277	return err;
3369afba FF	278
88c0a6b5 VO	279	info.info.extack = &extack;
	280	info.config = &kernel_cfg;
	281
	282	err = call_netdevice_notifiers_info(NETDEV_PRE_CHANGE_HWTSTAMP,
	283	&info.info);
	284	err = notifier_to_errno(err);
	285	if (err) {
	286	if (extack._msg)
	287	netdev_err(dev, "%s\n", extack._msg);
4ee58e1e	288	return err;
88c0a6b5	289	}
aad74d84	290
4ee58e1e	291	return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP);
aad74d84 FF	292	}
aad74d84 FF	293
3d9d00bd	294	static int dev_siocbond(struct net_device *dev,
a7605370 AB	295	struct ifreq *ifr, unsigned int cmd)
	296	{
	297	const struct net_device_ops *ops = dev->netdev_ops;
	298
3d9d00bd	299	if (ops->ndo_siocbond) {
a7605370	300	if (netif_device_present(dev))
3d9d00bd	301	return ops->ndo_siocbond(dev, ifr, cmd);
a7605370 AB	302	else
	303	return -ENODEV;
	304	}
	305
	306	return -EOPNOTSUPP;
	307	}
	308
a554bf96 AB	309	static int dev_siocdevprivate(struct net_device dev, struct ifreq ifr,
a554bf96 AB	310	void __user *data, unsigned int cmd)
b9067f5d AB	311	{
b9067f5d AB	312	const struct net_device_ops *ops = dev->netdev_ops;
b9067f5d AB	313
	314	if (ops->ndo_siocdevprivate) {
	315	if (netif_device_present(dev))
	316	return ops->ndo_siocdevprivate(dev, ifr, data, cmd);
	317	else
	318	return -ENODEV;
	319	}
	320
88fc023f	321	return -EOPNOTSUPP;
b9067f5d AB	322	}
b9067f5d AB	323
ad7eab2a AB	324	static int dev_siocwandev(struct net_device dev, struct if_settings ifs)
	325	{
	326	const struct net_device_ops *ops = dev->netdev_ops;
	327
	328	if (ops->ndo_siocwandev) {
	329	if (netif_device_present(dev))
	330	return ops->ndo_siocwandev(dev, ifs);
	331	else
	332	return -ENODEV;
	333	}
	334
	335	return -EOPNOTSUPP;
	336	}
	337
96b45cbd CW	338	/*
	339	* Perform the SIOCxIFxxx calls, inside rtnl_lock()
	340	*/
a554bf96 AB	341	static int dev_ifsioc(struct net net, struct ifreq ifr, void __user *data,
a554bf96 AB	342	unsigned int cmd)
96b45cbd CW	343	{
	344	int err;
	345	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
	346	const struct net_device_ops *ops;
14ed029b	347	netdevice_tracker dev_tracker;
96b45cbd CW	348
	349	if (!dev)
	350	return -ENODEV;
	351
	352	ops = dev->netdev_ops;
	353
	354	switch (cmd) {
	355	case SIOCSIFFLAGS: /* Set interface flags */
567c5e13	356	return dev_change_flags(dev, ifr->ifr_flags, NULL);
96b45cbd CW	357
	358	case SIOCSIFMETRIC: /* Set the metric on the interface
	359	(currently unused) */
	360	return -EOPNOTSUPP;
	361
	362	case SIOCSIFMTU: /* Set the MTU of a device */
	363	return dev_set_mtu(dev, ifr->ifr_mtu);
	364
	365	case SIOCSIFHWADDR:
0254e0c6 WC	366	if (dev->addr_len > sizeof(struct sockaddr))
0254e0c6 WC	367	return -EINVAL;
3b23a32a	368	return dev_set_mac_address_user(dev, &ifr->ifr_hwaddr, NULL);
96b45cbd CW	369
	370	case SIOCSIFHWBROADCAST:
	371	if (ifr->ifr_hwaddr.sa_family != dev->type)
	372	return -EINVAL;
	373	memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
b5f0de6d	374	min(sizeof(ifr->ifr_hwaddr.sa_data_min),
54aeba7f	375	(size_t)dev->addr_len));
96b45cbd CW	376	call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
	377	return 0;
	378
	379	case SIOCSIFMAP:
709566d7	380	return dev_setifmap(dev, ifr);
96b45cbd CW	381
	382	case SIOCADDMULTI:
	383	if (!ops->ndo_set_rx_mode \|\|
	384	ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
	385	return -EINVAL;
	386	if (!netif_device_present(dev))
	387	return -ENODEV;
	388	return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
	389
	390	case SIOCDELMULTI:
	391	if (!ops->ndo_set_rx_mode \|\|
	392	ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
	393	return -EINVAL;
	394	if (!netif_device_present(dev))
	395	return -ENODEV;
	396	return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
	397
	398	case SIOCSIFTXQLEN:
	399	if (ifr->ifr_qlen < 0)
	400	return -EINVAL;
8dd30201	401	return dev_change_tx_queue_len(dev, ifr->ifr_qlen);
96b45cbd CW	402
	403	case SIOCSIFNAME:
	404	ifr->ifr_newname[IFNAMSIZ-1] = '\0';
	405	return dev_change_name(dev, ifr->ifr_newname);
	406
ad7eab2a AB	407	case SIOCWANDEV:
	408	return dev_siocwandev(dev, &ifr->ifr_settings);
	409
ad2f99ae AB	410	case SIOCBRADDIF:
	411	case SIOCBRDELIF:
	412	if (!netif_device_present(dev))
	413	return -ENODEV;
9384eacd NA	414	if (!netif_is_bridge_master(dev))
9384eacd NA	415	return -EOPNOTSUPP;
d62607c3	416	netdev_hold(dev, &dev_tracker, GFP_KERNEL);
893b1958 NA	417	rtnl_unlock();
893b1958 NA	418	err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL);
d62607c3	419	netdev_put(dev, &dev_tracker);
893b1958 NA	420	rtnl_lock();
893b1958 NA	421	return err;
ad2f99ae	422
00d521b3 VO	423	case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15:
	424	return dev_siocdevprivate(dev, ifr, data, cmd);
	425
96b45cbd	426	case SIOCSHWTSTAMP:
4ee58e1e	427	return dev_set_hwtstamp(dev, ifr);
96b45cbd	428
00d521b3	429	case SIOCGHWTSTAMP:
4ee58e1e VO	430	return dev_get_hwtstamp(dev, ifr);
4ee58e1e VO	431
00d521b3 VO	432	case SIOCGMIIPHY:
	433	case SIOCGMIIREG:
	434	case SIOCSMIIREG:
	435	return dev_eth_ioctl(dev, ifr, cmd);
	436
	437	case SIOCBONDENSLAVE:
	438	case SIOCBONDRELEASE:
	439	case SIOCBONDSETHWADDR:
	440	case SIOCBONDSLAVEINFOQUERY:
	441	case SIOCBONDINFOQUERY:
	442	case SIOCBONDCHANGEACTIVE:
	443	return dev_siocbond(dev, ifr, cmd);
	444
	445	/* Unknown ioctl */
96b45cbd	446	default:
00d521b3	447	err = -EINVAL;
96b45cbd CW	448	}
	449	return err;
	450	}
	451
	452	/**
	453	* dev_load - load a network module
	454	* @net: the applicable net namespace
	455	* @name: name of interface
	456	*
	457	* If a network interface is not present and the process has suitable
	458	* privileges this function loads the module. If module loading is not
	459	* available in this kernel then it becomes a nop.
	460	*/
	461
	462	void dev_load(struct net net, const char name)
	463	{
	464	struct net_device *dev;
	465	int no_module;
	466
	467	rcu_read_lock();
	468	dev = dev_get_by_name_rcu(net, name);
	469	rcu_read_unlock();
	470
	471	no_module = !dev;
	472	if (no_module && capable(CAP_NET_ADMIN))
	473	no_module = request_module("netdev-%s", name);
e020836d DB	474	if (no_module && capable(CAP_SYS_MODULE))
e020836d DB	475	request_module("%s", name);
96b45cbd CW	476	}
	477	EXPORT_SYMBOL(dev_load);
	478
	479	/*
	480	* This function handles all "interface"-type I/O control requests. The actual
	481	* 'doing' part of this is dev_ifsioc above.
	482	*/
	483
	484	/**
	485	* dev_ioctl - network device ioctl
	486	* @net: the applicable net namespace
	487	* @cmd: command to issue
b3c0fd61	488	* @ifr: pointer to a struct ifreq in user space
e5b42483	489	* @data: data exchanged with userspace
b3c0fd61	490	* @need_copyout: whether or not copy_to_user() should be called
96b45cbd CW	491	*
	492	* Issue ioctl functions to devices. This is normally called by the
	493	* user space syscall interfaces but can sometimes be useful for
	494	* other purposes. The return value is the return from the syscall if
	495	* positive or a negative errno code on error.
	496	*/
	497
a554bf96 AB	498	int dev_ioctl(struct net net, unsigned int cmd, struct ifreq ifr,
a554bf96 AB	499	void __user data, bool need_copyout)
96b45cbd	500	{
96b45cbd CW	501	int ret;
	502	char *colon;
	503
44c02a2c AV	504	if (need_copyout)
44c02a2c AV	505	*need_copyout = true;
96b45cbd	506	if (cmd == SIOCGIFNAME)
44c02a2c	507	return dev_ifname(net, ifr);
96b45cbd	508
44c02a2c	509	ifr->ifr_name[IFNAMSIZ-1] = 0;
96b45cbd	510
44c02a2c	511	colon = strchr(ifr->ifr_name, ':');
96b45cbd CW	512	if (colon)
	513	*colon = 0;
	514
	515	/*
	516	* See which interface the caller is talking about.
	517	*/
	518
	519	switch (cmd) {
3b23a32a CW	520	case SIOCGIFHWADDR:
	521	dev_load(net, ifr->ifr_name);
	522	ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name);
	523	if (colon)
	524	*colon = ':';
	525	return ret;
96b45cbd CW	526	/*
	527	* These ioctl calls:
	528	* - can be done by all.
	529	* - atomic and do not require locking.
	530	* - return a value
	531	*/
	532	case SIOCGIFFLAGS:
	533	case SIOCGIFMETRIC:
	534	case SIOCGIFMTU:
96b45cbd CW	535	case SIOCGIFSLAVE:
	536	case SIOCGIFMAP:
	537	case SIOCGIFINDEX:
	538	case SIOCGIFTXQLEN:
b51f26b1	539	dev_load(net, ifr->ifr_name);
96b45cbd	540	rcu_read_lock();
44c02a2c	541	ret = dev_ifsioc_locked(net, ifr, cmd);
96b45cbd	542	rcu_read_unlock();
44c02a2c AV	543	if (colon)
44c02a2c AV	544	*colon = ':';
96b45cbd CW	545	return ret;
	546
	547	case SIOCETHTOOL:
b51f26b1	548	dev_load(net, ifr->ifr_name);
a554bf96	549	ret = dev_ethtool(net, ifr, data);
44c02a2c AV	550	if (colon)
44c02a2c AV	551	*colon = ':';
96b45cbd CW	552	return ret;
	553
	554	/*
	555	* These ioctl calls:
	556	* - require superuser power.
	557	* - require strict serialization.
	558	* - return a value
	559	*/
	560	case SIOCGMIIPHY:
	561	case SIOCGMIIREG:
	562	case SIOCSIFNAME:
b51f26b1	563	dev_load(net, ifr->ifr_name);
96b45cbd CW	564	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
96b45cbd CW	565	return -EPERM;
96b45cbd	566	rtnl_lock();
a554bf96	567	ret = dev_ifsioc(net, ifr, data, cmd);
96b45cbd	568	rtnl_unlock();
44c02a2c AV	569	if (colon)
44c02a2c AV	570	*colon = ':';
96b45cbd CW	571	return ret;
	572
	573	/*
	574	* These ioctl calls:
	575	* - require superuser power.
	576	* - require strict serialization.
	577	* - do not return a value
	578	*/
	579	case SIOCSIFMAP:
	580	case SIOCSIFTXQLEN:
	581	if (!capable(CAP_NET_ADMIN))
	582	return -EPERM;
df561f66	583	fallthrough;
96b45cbd CW	584	/*
	585	* These ioctl calls:
	586	* - require local superuser power.
	587	* - require strict serialization.
	588	* - do not return a value
	589	*/
	590	case SIOCSIFFLAGS:
	591	case SIOCSIFMETRIC:
	592	case SIOCSIFMTU:
	593	case SIOCSIFHWADDR:
	594	case SIOCSIFSLAVE:
	595	case SIOCADDMULTI:
	596	case SIOCDELMULTI:
	597	case SIOCSIFHWBROADCAST:
	598	case SIOCSMIIREG:
	599	case SIOCBONDENSLAVE:
	600	case SIOCBONDRELEASE:
	601	case SIOCBONDSETHWADDR:
	602	case SIOCBONDCHANGEACTIVE:
	603	case SIOCBRADDIF:
	604	case SIOCBRDELIF:
	605	case SIOCSHWTSTAMP:
	606	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
	607	return -EPERM;
df561f66	608	fallthrough;
96b45cbd CW	609	case SIOCBONDSLAVEINFOQUERY:
96b45cbd CW	610	case SIOCBONDINFOQUERY:
b51f26b1	611	dev_load(net, ifr->ifr_name);
96b45cbd	612	rtnl_lock();
a554bf96	613	ret = dev_ifsioc(net, ifr, data, cmd);
96b45cbd	614	rtnl_unlock();
44c02a2c AV	615	if (need_copyout)
44c02a2c AV	616	*need_copyout = false;
96b45cbd CW	617	return ret;
	618
	619	case SIOCGIFMEM:
	620	/* Get the per device memory space. We can add this but
	621	* currently do not support it */
	622	case SIOCSIFMEM:
	623	/* Set the per device memory buffer space.
	624	* Not applicable in our case */
	625	case SIOCSIFLINK:
	626	return -ENOTTY;
	627
	628	/*
	629	* Unknown or private ioctl.
	630	*/
	631	default:
	632	if (cmd == SIOCWANDEV \|\|
fd468c74	633	cmd == SIOCGHWTSTAMP \|\|
96b45cbd CW	634	(cmd >= SIOCDEVPRIVATE &&
96b45cbd CW	635	cmd <= SIOCDEVPRIVATE + 15)) {
b51f26b1	636	dev_load(net, ifr->ifr_name);
96b45cbd	637	rtnl_lock();
a554bf96	638	ret = dev_ifsioc(net, ifr, data, cmd);
96b45cbd	639	rtnl_unlock();
96b45cbd CW	640	return ret;
96b45cbd CW	641	}
96b45cbd CW	642	return -ENOTTY;
	643	}
	644	}