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authorCong Wang <xiyou.wangcong@gmail.com>2013-02-15 17:20:46 -0500
committerDavid S. Miller <davem@davemloft.net>2013-02-18 12:27:32 -0500
commit96b45cbd956ce83908378d87d009b05645353f22 (patch)
treec8decd7182281de10bd86a5d299afd37a1a16864 /net/core
parent31d17536631f79344c24fc44b50a0a241d0a701e (diff)
net: move ioctl functions into a separated file
They well deserve a separated unit. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/Makefile2
-rw-r--r--net/core/dev.c573
-rw-r--r--net/core/dev_ioctl.c576
3 files changed, 577 insertions, 574 deletions
diff --git a/net/core/Makefile b/net/core/Makefile
index 674641b13aea..0c5e3618c80b 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -9,7 +9,7 @@ obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
9 9
10obj-y += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \ 10obj-y += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \
11 neighbour.o rtnetlink.o utils.o link_watch.o filter.o \ 11 neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
12 sock_diag.o 12 sock_diag.o dev_ioctl.o
13 13
14obj-$(CONFIG_XFRM) += flow.o 14obj-$(CONFIG_XFRM) += flow.o
15obj-y += net-sysfs.o 15obj-y += net-sysfs.o
diff --git a/net/core/dev.c b/net/core/dev.c
index 6ad37896a324..1932d351ed7c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -106,7 +106,6 @@
106#include <net/xfrm.h> 106#include <net/xfrm.h>
107#include <linux/highmem.h> 107#include <linux/highmem.h>
108#include <linux/init.h> 108#include <linux/init.h>
109#include <linux/kmod.h>
110#include <linux/module.h> 109#include <linux/module.h>
111#include <linux/netpoll.h> 110#include <linux/netpoll.h>
112#include <linux/rcupdate.h> 111#include <linux/rcupdate.h>
@@ -132,7 +131,6 @@
132#include <linux/pci.h> 131#include <linux/pci.h>
133#include <linux/inetdevice.h> 132#include <linux/inetdevice.h>
134#include <linux/cpu_rmap.h> 133#include <linux/cpu_rmap.h>
135#include <linux/net_tstamp.h>
136#include <linux/static_key.h> 134#include <linux/static_key.h>
137 135
138#include "net-sysfs.h" 136#include "net-sysfs.h"
@@ -1226,36 +1224,6 @@ void netdev_notify_peers(struct net_device *dev)
1226} 1224}
1227EXPORT_SYMBOL(netdev_notify_peers); 1225EXPORT_SYMBOL(netdev_notify_peers);
1228 1226
1229/**
1230 * dev_load - load a network module
1231 * @net: the applicable net namespace
1232 * @name: name of interface
1233 *
1234 * If a network interface is not present and the process has suitable
1235 * privileges this function loads the module. If module loading is not
1236 * available in this kernel then it becomes a nop.
1237 */
1238
1239void dev_load(struct net *net, const char *name)
1240{
1241 struct net_device *dev;
1242 int no_module;
1243
1244 rcu_read_lock();
1245 dev = dev_get_by_name_rcu(net, name);
1246 rcu_read_unlock();
1247
1248 no_module = !dev;
1249 if (no_module && capable(CAP_NET_ADMIN))
1250 no_module = request_module("netdev-%s", name);
1251 if (no_module && capable(CAP_SYS_MODULE)) {
1252 if (!request_module("%s", name))
1253 pr_warn("Loading kernel module for a network device with CAP_SYS_MODULE (deprecated). Use CAP_NET_ADMIN and alias netdev-%s instead.\n",
1254 name);
1255 }
1256}
1257EXPORT_SYMBOL(dev_load);
1258
1259static int __dev_open(struct net_device *dev) 1227static int __dev_open(struct net_device *dev)
1260{ 1228{
1261 const struct net_device_ops *ops = dev->netdev_ops; 1229 const struct net_device_ops *ops = dev->netdev_ops;
@@ -1645,57 +1613,6 @@ static inline void net_timestamp_set(struct sk_buff *skb)
1645 __net_timestamp(SKB); \ 1613 __net_timestamp(SKB); \
1646 } \ 1614 } \
1647 1615
1648static int net_hwtstamp_validate(struct ifreq *ifr)
1649{
1650 struct hwtstamp_config cfg;
1651 enum hwtstamp_tx_types tx_type;
1652 enum hwtstamp_rx_filters rx_filter;
1653 int tx_type_valid = 0;
1654 int rx_filter_valid = 0;
1655
1656 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1657 return -EFAULT;
1658
1659 if (cfg.flags) /* reserved for future extensions */
1660 return -EINVAL;
1661
1662 tx_type = cfg.tx_type;
1663 rx_filter = cfg.rx_filter;
1664
1665 switch (tx_type) {
1666 case HWTSTAMP_TX_OFF:
1667 case HWTSTAMP_TX_ON:
1668 case HWTSTAMP_TX_ONESTEP_SYNC:
1669 tx_type_valid = 1;
1670 break;
1671 }
1672
1673 switch (rx_filter) {
1674 case HWTSTAMP_FILTER_NONE:
1675 case HWTSTAMP_FILTER_ALL:
1676 case HWTSTAMP_FILTER_SOME:
1677 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1678 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1679 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1680 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1681 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1682 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1683 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1684 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1685 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1686 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1687 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1688 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1689 rx_filter_valid = 1;
1690 break;
1691 }
1692
1693 if (!tx_type_valid || !rx_filter_valid)
1694 return -ERANGE;
1695
1696 return 0;
1697}
1698
1699static inline bool is_skb_forwardable(struct net_device *dev, 1616static inline bool is_skb_forwardable(struct net_device *dev,
1700 struct sk_buff *skb) 1617 struct sk_buff *skb)
1701{ 1618{
@@ -4300,127 +4217,6 @@ softnet_break:
4300 goto out; 4217 goto out;
4301} 4218}
4302 4219
4303static gifconf_func_t *gifconf_list[NPROTO];
4304
4305/**
4306 * register_gifconf - register a SIOCGIF handler
4307 * @family: Address family
4308 * @gifconf: Function handler
4309 *
4310 * Register protocol dependent address dumping routines. The handler
4311 * that is passed must not be freed or reused until it has been replaced
4312 * by another handler.
4313 */
4314int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
4315{
4316 if (family >= NPROTO)
4317 return -EINVAL;
4318 gifconf_list[family] = gifconf;
4319 return 0;
4320}
4321EXPORT_SYMBOL(register_gifconf);
4322
4323
4324/*
4325 * Map an interface index to its name (SIOCGIFNAME)
4326 */
4327
4328/*
4329 * We need this ioctl for efficient implementation of the
4330 * if_indextoname() function required by the IPv6 API. Without
4331 * it, we would have to search all the interfaces to find a
4332 * match. --pb
4333 */
4334
4335static int dev_ifname(struct net *net, struct ifreq __user *arg)
4336{
4337 struct net_device *dev;
4338 struct ifreq ifr;
4339 unsigned seq;
4340
4341 /*
4342 * Fetch the caller's info block.
4343 */
4344
4345 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
4346 return -EFAULT;
4347
4348retry:
4349 seq = read_seqcount_begin(&devnet_rename_seq);
4350 rcu_read_lock();
4351 dev = dev_get_by_index_rcu(net, ifr.ifr_ifindex);
4352 if (!dev) {
4353 rcu_read_unlock();
4354 return -ENODEV;
4355 }
4356
4357 strcpy(ifr.ifr_name, dev->name);
4358 rcu_read_unlock();
4359 if (read_seqcount_retry(&devnet_rename_seq, seq))
4360 goto retry;
4361
4362 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
4363 return -EFAULT;
4364 return 0;
4365}
4366
4367/*
4368 * Perform a SIOCGIFCONF call. This structure will change
4369 * size eventually, and there is nothing I can do about it.
4370 * Thus we will need a 'compatibility mode'.
4371 */
4372
4373static int dev_ifconf(struct net *net, char __user *arg)
4374{
4375 struct ifconf ifc;
4376 struct net_device *dev;
4377 char __user *pos;
4378 int len;
4379 int total;
4380 int i;
4381
4382 /*
4383 * Fetch the caller's info block.
4384 */
4385
4386 if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
4387 return -EFAULT;
4388
4389 pos = ifc.ifc_buf;
4390 len = ifc.ifc_len;
4391
4392 /*
4393 * Loop over the interfaces, and write an info block for each.
4394 */
4395
4396 total = 0;
4397 for_each_netdev(net, dev) {
4398 for (i = 0; i < NPROTO; i++) {
4399 if (gifconf_list[i]) {
4400 int done;
4401 if (!pos)
4402 done = gifconf_list[i](dev, NULL, 0);
4403 else
4404 done = gifconf_list[i](dev, pos + total,
4405 len - total);
4406 if (done < 0)
4407 return -EFAULT;
4408 total += done;
4409 }
4410 }
4411 }
4412
4413 /*
4414 * All done. Write the updated control block back to the caller.
4415 */
4416 ifc.ifc_len = total;
4417
4418 /*
4419 * Both BSD and Solaris return 0 here, so we do too.
4420 */
4421 return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
4422}
4423
4424#ifdef CONFIG_PROC_FS 4220#ifdef CONFIG_PROC_FS
4425 4221
4426#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1) 4222#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
@@ -5381,375 +5177,6 @@ int dev_change_carrier(struct net_device *dev, bool new_carrier)
5381} 5177}
5382EXPORT_SYMBOL(dev_change_carrier); 5178EXPORT_SYMBOL(dev_change_carrier);
5383 5179
5384/*
5385 * Perform the SIOCxIFxxx calls, inside rcu_read_lock()
5386 */
5387static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
5388{
5389 int err;
5390 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
5391
5392 if (!dev)
5393 return -ENODEV;
5394
5395 switch (cmd) {
5396 case SIOCGIFFLAGS: /* Get interface flags */
5397 ifr->ifr_flags = (short) dev_get_flags(dev);
5398 return 0;
5399
5400 case SIOCGIFMETRIC: /* Get the metric on the interface
5401 (currently unused) */
5402 ifr->ifr_metric = 0;
5403 return 0;
5404
5405 case SIOCGIFMTU: /* Get the MTU of a device */
5406 ifr->ifr_mtu = dev->mtu;
5407 return 0;
5408
5409 case SIOCGIFHWADDR:
5410 if (!dev->addr_len)
5411 memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data);
5412 else
5413 memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
5414 min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
5415 ifr->ifr_hwaddr.sa_family = dev->type;
5416 return 0;
5417
5418 case SIOCGIFSLAVE:
5419 err = -EINVAL;
5420 break;
5421
5422 case SIOCGIFMAP:
5423 ifr->ifr_map.mem_start = dev->mem_start;
5424 ifr->ifr_map.mem_end = dev->mem_end;
5425 ifr->ifr_map.base_addr = dev->base_addr;
5426 ifr->ifr_map.irq = dev->irq;
5427 ifr->ifr_map.dma = dev->dma;
5428 ifr->ifr_map.port = dev->if_port;
5429 return 0;
5430
5431 case SIOCGIFINDEX:
5432 ifr->ifr_ifindex = dev->ifindex;
5433 return 0;
5434
5435 case SIOCGIFTXQLEN:
5436 ifr->ifr_qlen = dev->tx_queue_len;
5437 return 0;
5438
5439 default:
5440 /* dev_ioctl() should ensure this case
5441 * is never reached
5442 */
5443 WARN_ON(1);
5444 err = -ENOTTY;
5445 break;
5446
5447 }
5448 return err;
5449}
5450
5451/*
5452 * Perform the SIOCxIFxxx calls, inside rtnl_lock()
5453 */
5454static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
5455{
5456 int err;
5457 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
5458 const struct net_device_ops *ops;
5459
5460 if (!dev)
5461 return -ENODEV;
5462
5463 ops = dev->netdev_ops;
5464
5465 switch (cmd) {
5466 case SIOCSIFFLAGS: /* Set interface flags */
5467 return dev_change_flags(dev, ifr->ifr_flags);
5468
5469 case SIOCSIFMETRIC: /* Set the metric on the interface
5470 (currently unused) */
5471 return -EOPNOTSUPP;
5472
5473 case SIOCSIFMTU: /* Set the MTU of a device */
5474 return dev_set_mtu(dev, ifr->ifr_mtu);
5475
5476 case SIOCSIFHWADDR:
5477 return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
5478
5479 case SIOCSIFHWBROADCAST:
5480 if (ifr->ifr_hwaddr.sa_family != dev->type)
5481 return -EINVAL;
5482 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
5483 min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
5484 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
5485 return 0;
5486
5487 case SIOCSIFMAP:
5488 if (ops->ndo_set_config) {
5489 if (!netif_device_present(dev))
5490 return -ENODEV;
5491 return ops->ndo_set_config(dev, &ifr->ifr_map);
5492 }
5493 return -EOPNOTSUPP;
5494
5495 case SIOCADDMULTI:
5496 if (!ops->ndo_set_rx_mode ||
5497 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
5498 return -EINVAL;
5499 if (!netif_device_present(dev))
5500 return -ENODEV;
5501 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
5502
5503 case SIOCDELMULTI:
5504 if (!ops->ndo_set_rx_mode ||
5505 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
5506 return -EINVAL;
5507 if (!netif_device_present(dev))
5508 return -ENODEV;
5509 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
5510
5511 case SIOCSIFTXQLEN:
5512 if (ifr->ifr_qlen < 0)
5513 return -EINVAL;
5514 dev->tx_queue_len = ifr->ifr_qlen;
5515 return 0;
5516
5517 case SIOCSIFNAME:
5518 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
5519 return dev_change_name(dev, ifr->ifr_newname);
5520
5521 case SIOCSHWTSTAMP:
5522 err = net_hwtstamp_validate(ifr);
5523 if (err)
5524 return err;
5525 /* fall through */
5526
5527 /*
5528 * Unknown or private ioctl
5529 */
5530 default:
5531 if ((cmd >= SIOCDEVPRIVATE &&
5532 cmd <= SIOCDEVPRIVATE + 15) ||
5533 cmd == SIOCBONDENSLAVE ||
5534 cmd == SIOCBONDRELEASE ||
5535 cmd == SIOCBONDSETHWADDR ||
5536 cmd == SIOCBONDSLAVEINFOQUERY ||
5537 cmd == SIOCBONDINFOQUERY ||
5538 cmd == SIOCBONDCHANGEACTIVE ||
5539 cmd == SIOCGMIIPHY ||
5540 cmd == SIOCGMIIREG ||
5541 cmd == SIOCSMIIREG ||
5542 cmd == SIOCBRADDIF ||
5543 cmd == SIOCBRDELIF ||
5544 cmd == SIOCSHWTSTAMP ||
5545 cmd == SIOCWANDEV) {
5546 err = -EOPNOTSUPP;
5547 if (ops->ndo_do_ioctl) {
5548 if (netif_device_present(dev))
5549 err = ops->ndo_do_ioctl(dev, ifr, cmd);
5550 else
5551 err = -ENODEV;
5552 }
5553 } else
5554 err = -EINVAL;
5555
5556 }
5557 return err;
5558}
5559
5560/*
5561 * This function handles all "interface"-type I/O control requests. The actual
5562 * 'doing' part of this is dev_ifsioc above.
5563 */
5564
5565/**
5566 * dev_ioctl - network device ioctl
5567 * @net: the applicable net namespace
5568 * @cmd: command to issue
5569 * @arg: pointer to a struct ifreq in user space
5570 *
5571 * Issue ioctl functions to devices. This is normally called by the
5572 * user space syscall interfaces but can sometimes be useful for
5573 * other purposes. The return value is the return from the syscall if
5574 * positive or a negative errno code on error.
5575 */
5576
5577int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
5578{
5579 struct ifreq ifr;
5580 int ret;
5581 char *colon;
5582
5583 /* One special case: SIOCGIFCONF takes ifconf argument
5584 and requires shared lock, because it sleeps writing
5585 to user space.
5586 */
5587
5588 if (cmd == SIOCGIFCONF) {
5589 rtnl_lock();
5590 ret = dev_ifconf(net, (char __user *) arg);
5591 rtnl_unlock();
5592 return ret;
5593 }
5594 if (cmd == SIOCGIFNAME)
5595 return dev_ifname(net, (struct ifreq __user *)arg);
5596
5597 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
5598 return -EFAULT;
5599
5600 ifr.ifr_name[IFNAMSIZ-1] = 0;
5601
5602 colon = strchr(ifr.ifr_name, ':');
5603 if (colon)
5604 *colon = 0;
5605
5606 /*
5607 * See which interface the caller is talking about.
5608 */
5609
5610 switch (cmd) {
5611 /*
5612 * These ioctl calls:
5613 * - can be done by all.
5614 * - atomic and do not require locking.
5615 * - return a value
5616 */
5617 case SIOCGIFFLAGS:
5618 case SIOCGIFMETRIC:
5619 case SIOCGIFMTU:
5620 case SIOCGIFHWADDR:
5621 case SIOCGIFSLAVE:
5622 case SIOCGIFMAP:
5623 case SIOCGIFINDEX:
5624 case SIOCGIFTXQLEN:
5625 dev_load(net, ifr.ifr_name);
5626 rcu_read_lock();
5627 ret = dev_ifsioc_locked(net, &ifr, cmd);
5628 rcu_read_unlock();
5629 if (!ret) {
5630 if (colon)
5631 *colon = ':';
5632 if (copy_to_user(arg, &ifr,
5633 sizeof(struct ifreq)))
5634 ret = -EFAULT;
5635 }
5636 return ret;
5637
5638 case SIOCETHTOOL:
5639 dev_load(net, ifr.ifr_name);
5640 rtnl_lock();
5641 ret = dev_ethtool(net, &ifr);
5642 rtnl_unlock();
5643 if (!ret) {
5644 if (colon)
5645 *colon = ':';
5646 if (copy_to_user(arg, &ifr,
5647 sizeof(struct ifreq)))
5648 ret = -EFAULT;
5649 }
5650 return ret;
5651
5652 /*
5653 * These ioctl calls:
5654 * - require superuser power.
5655 * - require strict serialization.
5656 * - return a value
5657 */
5658 case SIOCGMIIPHY:
5659 case SIOCGMIIREG:
5660 case SIOCSIFNAME:
5661 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5662 return -EPERM;
5663 dev_load(net, ifr.ifr_name);
5664 rtnl_lock();
5665 ret = dev_ifsioc(net, &ifr, cmd);
5666 rtnl_unlock();
5667 if (!ret) {
5668 if (colon)
5669 *colon = ':';
5670 if (copy_to_user(arg, &ifr,
5671 sizeof(struct ifreq)))
5672 ret = -EFAULT;
5673 }
5674 return ret;
5675
5676 /*
5677 * These ioctl calls:
5678 * - require superuser power.
5679 * - require strict serialization.
5680 * - do not return a value
5681 */
5682 case SIOCSIFMAP:
5683 case SIOCSIFTXQLEN:
5684 if (!capable(CAP_NET_ADMIN))
5685 return -EPERM;
5686 /* fall through */
5687 /*
5688 * These ioctl calls:
5689 * - require local superuser power.
5690 * - require strict serialization.
5691 * - do not return a value
5692 */
5693 case SIOCSIFFLAGS:
5694 case SIOCSIFMETRIC:
5695 case SIOCSIFMTU:
5696 case SIOCSIFHWADDR:
5697 case SIOCSIFSLAVE:
5698 case SIOCADDMULTI:
5699 case SIOCDELMULTI:
5700 case SIOCSIFHWBROADCAST:
5701 case SIOCSMIIREG:
5702 case SIOCBONDENSLAVE:
5703 case SIOCBONDRELEASE:
5704 case SIOCBONDSETHWADDR:
5705 case SIOCBONDCHANGEACTIVE:
5706 case SIOCBRADDIF:
5707 case SIOCBRDELIF:
5708 case SIOCSHWTSTAMP:
5709 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5710 return -EPERM;
5711 /* fall through */
5712 case SIOCBONDSLAVEINFOQUERY:
5713 case SIOCBONDINFOQUERY:
5714 dev_load(net, ifr.ifr_name);
5715 rtnl_lock();
5716 ret = dev_ifsioc(net, &ifr, cmd);
5717 rtnl_unlock();
5718 return ret;
5719
5720 case SIOCGIFMEM:
5721 /* Get the per device memory space. We can add this but
5722 * currently do not support it */
5723 case SIOCSIFMEM:
5724 /* Set the per device memory buffer space.
5725 * Not applicable in our case */
5726 case SIOCSIFLINK:
5727 return -ENOTTY;
5728
5729 /*
5730 * Unknown or private ioctl.
5731 */
5732 default:
5733 if (cmd == SIOCWANDEV ||
5734 (cmd >= SIOCDEVPRIVATE &&
5735 cmd <= SIOCDEVPRIVATE + 15)) {
5736 dev_load(net, ifr.ifr_name);
5737 rtnl_lock();
5738 ret = dev_ifsioc(net, &ifr, cmd);
5739 rtnl_unlock();
5740 if (!ret && copy_to_user(arg, &ifr,
5741 sizeof(struct ifreq)))
5742 ret = -EFAULT;
5743 return ret;
5744 }
5745 /* Take care of Wireless Extensions */
5746 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
5747 return wext_handle_ioctl(net, &ifr, cmd, arg);
5748 return -ENOTTY;
5749 }
5750}
5751
5752
5753/** 5180/**
5754 * dev_new_index - allocate an ifindex 5181 * dev_new_index - allocate an ifindex
5755 * @net: the applicable net namespace 5182 * @net: the applicable net namespace
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
new file mode 100644
index 000000000000..6cc0481faade
--- /dev/null
+++ b/net/core/dev_ioctl.c
@@ -0,0 +1,576 @@
1#include <linux/kmod.h>
2#include <linux/netdevice.h>
3#include <linux/etherdevice.h>
4#include <linux/rtnetlink.h>
5#include <linux/net_tstamp.h>
6#include <linux/wireless.h>
7#include <net/wext.h>
8
9/*
10 * Map an interface index to its name (SIOCGIFNAME)
11 */
12
13/*
14 * We need this ioctl for efficient implementation of the
15 * if_indextoname() function required by the IPv6 API. Without
16 * it, we would have to search all the interfaces to find a
17 * match. --pb
18 */
19
20static int dev_ifname(struct net *net, struct ifreq __user *arg)
21{
22 struct net_device *dev;
23 struct ifreq ifr;
24 unsigned seq;
25
26 /*
27 * Fetch the caller's info block.
28 */
29
30 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
31 return -EFAULT;
32
33retry:
34 seq = read_seqcount_begin(&devnet_rename_seq);
35 rcu_read_lock();
36 dev = dev_get_by_index_rcu(net, ifr.ifr_ifindex);
37 if (!dev) {
38 rcu_read_unlock();
39 return -ENODEV;
40 }
41
42 strcpy(ifr.ifr_name, dev->name);
43 rcu_read_unlock();
44 if (read_seqcount_retry(&devnet_rename_seq, seq))
45 goto retry;
46
47 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
48 return -EFAULT;
49 return 0;
50}
51
52static gifconf_func_t *gifconf_list[NPROTO];
53
54/**
55 * register_gifconf - register a SIOCGIF handler
56 * @family: Address family
57 * @gifconf: Function handler
58 *
59 * Register protocol dependent address dumping routines. The handler
60 * that is passed must not be freed or reused until it has been replaced
61 * by another handler.
62 */
63int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
64{
65 if (family >= NPROTO)
66 return -EINVAL;
67 gifconf_list[family] = gifconf;
68 return 0;
69}
70EXPORT_SYMBOL(register_gifconf);
71
72/*
73 * Perform a SIOCGIFCONF call. This structure will change
74 * size eventually, and there is nothing I can do about it.
75 * Thus we will need a 'compatibility mode'.
76 */
77
78static int dev_ifconf(struct net *net, char __user *arg)
79{
80 struct ifconf ifc;
81 struct net_device *dev;
82 char __user *pos;
83 int len;
84 int total;
85 int i;
86
87 /*
88 * Fetch the caller's info block.
89 */
90
91 if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
92 return -EFAULT;
93
94 pos = ifc.ifc_buf;
95 len = ifc.ifc_len;
96
97 /*
98 * Loop over the interfaces, and write an info block for each.
99 */
100
101 total = 0;
102 for_each_netdev(net, dev) {
103 for (i = 0; i < NPROTO; i++) {
104 if (gifconf_list[i]) {
105 int done;
106 if (!pos)
107 done = gifconf_list[i](dev, NULL, 0);
108 else
109 done = gifconf_list[i](dev, pos + total,
110 len - total);
111 if (done < 0)
112 return -EFAULT;
113 total += done;
114 }
115 }
116 }
117
118 /*
119 * All done. Write the updated control block back to the caller.
120 */
121 ifc.ifc_len = total;
122
123 /*
124 * Both BSD and Solaris return 0 here, so we do too.
125 */
126 return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
127}
128
129/*
130 * Perform the SIOCxIFxxx calls, inside rcu_read_lock()
131 */
132static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
133{
134 int err;
135 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
136
137 if (!dev)
138 return -ENODEV;
139
140 switch (cmd) {
141 case SIOCGIFFLAGS: /* Get interface flags */
142 ifr->ifr_flags = (short) dev_get_flags(dev);
143 return 0;
144
145 case SIOCGIFMETRIC: /* Get the metric on the interface
146 (currently unused) */
147 ifr->ifr_metric = 0;
148 return 0;
149
150 case SIOCGIFMTU: /* Get the MTU of a device */
151 ifr->ifr_mtu = dev->mtu;
152 return 0;
153
154 case SIOCGIFHWADDR:
155 if (!dev->addr_len)
156 memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data);
157 else
158 memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
159 min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
160 ifr->ifr_hwaddr.sa_family = dev->type;
161 return 0;
162
163 case SIOCGIFSLAVE:
164 err = -EINVAL;
165 break;
166
167 case SIOCGIFMAP:
168 ifr->ifr_map.mem_start = dev->mem_start;
169 ifr->ifr_map.mem_end = dev->mem_end;
170 ifr->ifr_map.base_addr = dev->base_addr;
171 ifr->ifr_map.irq = dev->irq;
172 ifr->ifr_map.dma = dev->dma;
173 ifr->ifr_map.port = dev->if_port;
174 return 0;
175
176 case SIOCGIFINDEX:
177 ifr->ifr_ifindex = dev->ifindex;
178 return 0;
179
180 case SIOCGIFTXQLEN:
181 ifr->ifr_qlen = dev->tx_queue_len;
182 return 0;
183
184 default:
185 /* dev_ioctl() should ensure this case
186 * is never reached
187 */
188 WARN_ON(1);
189 err = -ENOTTY;
190 break;
191
192 }
193 return err;
194}
195
196static int net_hwtstamp_validate(struct ifreq *ifr)
197{
198 struct hwtstamp_config cfg;
199 enum hwtstamp_tx_types tx_type;
200 enum hwtstamp_rx_filters rx_filter;
201 int tx_type_valid = 0;
202 int rx_filter_valid = 0;
203
204 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
205 return -EFAULT;
206
207 if (cfg.flags) /* reserved for future extensions */
208 return -EINVAL;
209
210 tx_type = cfg.tx_type;
211 rx_filter = cfg.rx_filter;
212
213 switch (tx_type) {
214 case HWTSTAMP_TX_OFF:
215 case HWTSTAMP_TX_ON:
216 case HWTSTAMP_TX_ONESTEP_SYNC:
217 tx_type_valid = 1;
218 break;
219 }
220
221 switch (rx_filter) {
222 case HWTSTAMP_FILTER_NONE:
223 case HWTSTAMP_FILTER_ALL:
224 case HWTSTAMP_FILTER_SOME:
225 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
226 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
227 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
228 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
229 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
230 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
231 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
232 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
233 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
234 case HWTSTAMP_FILTER_PTP_V2_EVENT:
235 case HWTSTAMP_FILTER_PTP_V2_SYNC:
236 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
237 rx_filter_valid = 1;
238 break;
239 }
240
241 if (!tx_type_valid || !rx_filter_valid)
242 return -ERANGE;
243
244 return 0;
245}
246
247/*
248 * Perform the SIOCxIFxxx calls, inside rtnl_lock()
249 */
250static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
251{
252 int err;
253 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
254 const struct net_device_ops *ops;
255
256 if (!dev)
257 return -ENODEV;
258
259 ops = dev->netdev_ops;
260
261 switch (cmd) {
262 case SIOCSIFFLAGS: /* Set interface flags */
263 return dev_change_flags(dev, ifr->ifr_flags);
264
265 case SIOCSIFMETRIC: /* Set the metric on the interface
266 (currently unused) */
267 return -EOPNOTSUPP;
268
269 case SIOCSIFMTU: /* Set the MTU of a device */
270 return dev_set_mtu(dev, ifr->ifr_mtu);
271
272 case SIOCSIFHWADDR:
273 return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
274
275 case SIOCSIFHWBROADCAST:
276 if (ifr->ifr_hwaddr.sa_family != dev->type)
277 return -EINVAL;
278 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
279 min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
280 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
281 return 0;
282
283 case SIOCSIFMAP:
284 if (ops->ndo_set_config) {
285 if (!netif_device_present(dev))
286 return -ENODEV;
287 return ops->ndo_set_config(dev, &ifr->ifr_map);
288 }
289 return -EOPNOTSUPP;
290
291 case SIOCADDMULTI:
292 if (!ops->ndo_set_rx_mode ||
293 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
294 return -EINVAL;
295 if (!netif_device_present(dev))
296 return -ENODEV;
297 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
298
299 case SIOCDELMULTI:
300 if (!ops->ndo_set_rx_mode ||
301 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
302 return -EINVAL;
303 if (!netif_device_present(dev))
304 return -ENODEV;
305 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
306
307 case SIOCSIFTXQLEN:
308 if (ifr->ifr_qlen < 0)
309 return -EINVAL;
310 dev->tx_queue_len = ifr->ifr_qlen;
311 return 0;
312
313 case SIOCSIFNAME:
314 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
315 return dev_change_name(dev, ifr->ifr_newname);
316
317 case SIOCSHWTSTAMP:
318 err = net_hwtstamp_validate(ifr);
319 if (err)
320 return err;
321 /* fall through */
322
323 /*
324 * Unknown or private ioctl
325 */
326 default:
327 if ((cmd >= SIOCDEVPRIVATE &&
328 cmd <= SIOCDEVPRIVATE + 15) ||
329 cmd == SIOCBONDENSLAVE ||
330 cmd == SIOCBONDRELEASE ||
331 cmd == SIOCBONDSETHWADDR ||
332 cmd == SIOCBONDSLAVEINFOQUERY ||
333 cmd == SIOCBONDINFOQUERY ||
334 cmd == SIOCBONDCHANGEACTIVE ||
335 cmd == SIOCGMIIPHY ||
336 cmd == SIOCGMIIREG ||
337 cmd == SIOCSMIIREG ||
338 cmd == SIOCBRADDIF ||
339 cmd == SIOCBRDELIF ||
340 cmd == SIOCSHWTSTAMP ||
341 cmd == SIOCWANDEV) {
342 err = -EOPNOTSUPP;
343 if (ops->ndo_do_ioctl) {
344 if (netif_device_present(dev))
345 err = ops->ndo_do_ioctl(dev, ifr, cmd);
346 else
347 err = -ENODEV;
348 }
349 } else
350 err = -EINVAL;
351
352 }
353 return err;
354}
355
356/**
357 * dev_load - load a network module
358 * @net: the applicable net namespace
359 * @name: name of interface
360 *
361 * If a network interface is not present and the process has suitable
362 * privileges this function loads the module. If module loading is not
363 * available in this kernel then it becomes a nop.
364 */
365
366void dev_load(struct net *net, const char *name)
367{
368 struct net_device *dev;
369 int no_module;
370
371 rcu_read_lock();
372 dev = dev_get_by_name_rcu(net, name);
373 rcu_read_unlock();
374
375 no_module = !dev;
376 if (no_module && capable(CAP_NET_ADMIN))
377 no_module = request_module("netdev-%s", name);
378 if (no_module && capable(CAP_SYS_MODULE)) {
379 if (!request_module("%s", name))
380 pr_warn("Loading kernel module for a network device with CAP_SYS_MODULE (deprecated). Use CAP_NET_ADMIN and alias netdev-%s instead.\n",
381 name);
382 }
383}
384EXPORT_SYMBOL(dev_load);
385
386/*
387 * This function handles all "interface"-type I/O control requests. The actual
388 * 'doing' part of this is dev_ifsioc above.
389 */
390
391/**
392 * dev_ioctl - network device ioctl
393 * @net: the applicable net namespace
394 * @cmd: command to issue
395 * @arg: pointer to a struct ifreq in user space
396 *
397 * Issue ioctl functions to devices. This is normally called by the
398 * user space syscall interfaces but can sometimes be useful for
399 * other purposes. The return value is the return from the syscall if
400 * positive or a negative errno code on error.
401 */
402
403int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
404{
405 struct ifreq ifr;
406 int ret;
407 char *colon;
408
409 /* One special case: SIOCGIFCONF takes ifconf argument
410 and requires shared lock, because it sleeps writing
411 to user space.
412 */
413
414 if (cmd == SIOCGIFCONF) {
415 rtnl_lock();
416 ret = dev_ifconf(net, (char __user *) arg);
417 rtnl_unlock();
418 return ret;
419 }
420 if (cmd == SIOCGIFNAME)
421 return dev_ifname(net, (struct ifreq __user *)arg);
422
423 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
424 return -EFAULT;
425
426 ifr.ifr_name[IFNAMSIZ-1] = 0;
427
428 colon = strchr(ifr.ifr_name, ':');
429 if (colon)
430 *colon = 0;
431
432 /*
433 * See which interface the caller is talking about.
434 */
435
436 switch (cmd) {
437 /*
438 * These ioctl calls:
439 * - can be done by all.
440 * - atomic and do not require locking.
441 * - return a value
442 */
443 case SIOCGIFFLAGS:
444 case SIOCGIFMETRIC:
445 case SIOCGIFMTU:
446 case SIOCGIFHWADDR:
447 case SIOCGIFSLAVE:
448 case SIOCGIFMAP:
449 case SIOCGIFINDEX:
450 case SIOCGIFTXQLEN:
451 dev_load(net, ifr.ifr_name);
452 rcu_read_lock();
453 ret = dev_ifsioc_locked(net, &ifr, cmd);
454 rcu_read_unlock();
455 if (!ret) {
456 if (colon)
457 *colon = ':';
458 if (copy_to_user(arg, &ifr,
459 sizeof(struct ifreq)))
460 ret = -EFAULT;
461 }
462 return ret;
463
464 case SIOCETHTOOL:
465 dev_load(net, ifr.ifr_name);
466 rtnl_lock();
467 ret = dev_ethtool(net, &ifr);
468 rtnl_unlock();
469 if (!ret) {
470 if (colon)
471 *colon = ':';
472 if (copy_to_user(arg, &ifr,
473 sizeof(struct ifreq)))
474 ret = -EFAULT;
475 }
476 return ret;
477
478 /*
479 * These ioctl calls:
480 * - require superuser power.
481 * - require strict serialization.
482 * - return a value
483 */
484 case SIOCGMIIPHY:
485 case SIOCGMIIREG:
486 case SIOCSIFNAME:
487 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
488 return -EPERM;
489 dev_load(net, ifr.ifr_name);
490 rtnl_lock();
491 ret = dev_ifsioc(net, &ifr, cmd);
492 rtnl_unlock();
493 if (!ret) {
494 if (colon)
495 *colon = ':';
496 if (copy_to_user(arg, &ifr,
497 sizeof(struct ifreq)))
498 ret = -EFAULT;
499 }
500 return ret;
501
502 /*
503 * These ioctl calls:
504 * - require superuser power.
505 * - require strict serialization.
506 * - do not return a value
507 */
508 case SIOCSIFMAP:
509 case SIOCSIFTXQLEN:
510 if (!capable(CAP_NET_ADMIN))
511 return -EPERM;
512 /* fall through */
513 /*
514 * These ioctl calls:
515 * - require local superuser power.
516 * - require strict serialization.
517 * - do not return a value
518 */
519 case SIOCSIFFLAGS:
520 case SIOCSIFMETRIC:
521 case SIOCSIFMTU:
522 case SIOCSIFHWADDR:
523 case SIOCSIFSLAVE:
524 case SIOCADDMULTI:
525 case SIOCDELMULTI:
526 case SIOCSIFHWBROADCAST:
527 case SIOCSMIIREG:
528 case SIOCBONDENSLAVE:
529 case SIOCBONDRELEASE:
530 case SIOCBONDSETHWADDR:
531 case SIOCBONDCHANGEACTIVE:
532 case SIOCBRADDIF:
533 case SIOCBRDELIF:
534 case SIOCSHWTSTAMP:
535 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
536 return -EPERM;
537 /* fall through */
538 case SIOCBONDSLAVEINFOQUERY:
539 case SIOCBONDINFOQUERY:
540 dev_load(net, ifr.ifr_name);
541 rtnl_lock();
542 ret = dev_ifsioc(net, &ifr, cmd);
543 rtnl_unlock();
544 return ret;
545
546 case SIOCGIFMEM:
547 /* Get the per device memory space. We can add this but
548 * currently do not support it */
549 case SIOCSIFMEM:
550 /* Set the per device memory buffer space.
551 * Not applicable in our case */
552 case SIOCSIFLINK:
553 return -ENOTTY;
554
555 /*
556 * Unknown or private ioctl.
557 */
558 default:
559 if (cmd == SIOCWANDEV ||
560 (cmd >= SIOCDEVPRIVATE &&
561 cmd <= SIOCDEVPRIVATE + 15)) {
562 dev_load(net, ifr.ifr_name);
563 rtnl_lock();
564 ret = dev_ifsioc(net, &ifr, cmd);
565 rtnl_unlock();
566 if (!ret && copy_to_user(arg, &ifr,
567 sizeof(struct ifreq)))
568 ret = -EFAULT;
569 return ret;
570 }
571 /* Take care of Wireless Extensions */
572 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
573 return wext_handle_ioctl(net, &ifr, cmd, arg);
574 return -ENOTTY;
575 }
576}
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-30 09:24:37 -0400