litmus-rt.git - The LITMUS^RT kernel.

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author	Kukjin Kim <kgene.kim@samsung.com>	2011-02-09 20:56:18 -0500
committer	Kukjin Kim <kgene.kim@samsung.com>	2011-02-16 22:52:52 -0500
commit	d76b782775f1a9e5cd20eabe95e49ba9e03415b0 (patch)
tree	7c2f0108b7b64ee554146d42d9b66819df48a643
parent	5180f5e036574cb71cbd366fb5e94aac454ce771 (diff)

ARM: S5P6442: Cleanup map.h file

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

Diffstat

-rw-r--r--

arch/arm/mach-s5p6442/include/mach/map.h

1 files changed, 37 insertions, 32 deletions


diff --git a/arch/arm/mach-s5p6442/include/mach/map.h b/arch/arm/mach-s5p6442/include/mach/map.h index 203dd5a18bd5..058dab4482a1 100644 --- a/arch/arm/mach-s5p6442/include/mach/map.h +++ b/arch/arm/mach-s5p6442/include/mach/map.h
@@ -1,6 +1,6 @@
1	/* linux/arch/arm/mach-s5p6442/include/mach/map.h	1	/* linux/arch/arm/mach-s5p6442/include/mach/map.h
2	*	2	*
3	* Copyright (c) 2010 Samsung Electronics Co., Ltd.	3	* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
4	* http://www.samsung.com/	4	* http://www.samsung.com/
5	*	5	*
6	* S5P6442 - Memory map definitions	6	* S5P6442 - Memory map definitions
@@ -16,56 +16,61 @@
16	#include <plat/map-base.h>	16	#include <plat/map-base.h>
17	#include <plat/map-s5p.h>	17	#include <plat/map-s5p.h>
18		18
19	#define S5P6442_PA_CHIPID (0xE0000000)	19	#define S5P6442_PA_SDRAM 0x20000000
20	#define S5P_PA_CHIPID S5P6442_PA_CHIPID
21		20
22	#define S5P6442_PA_SYSCON (0xE0100000)	21	#define S5P6442_PA_I2S0 0xC0B00000
23	#define S5P_PA_SYSCON S5P6442_PA_SYSCON	22	#define S5P6442_PA_I2S1 0xF2200000
24		23
25	#define S5P6442_PA_GPIO (0xE0200000)	24	#define S5P6442_PA_CHIPID 0xE0000000
26		25
27	#define S5P6442_PA_VIC0 (0xE4000000)	26	#define S5P6442_PA_SYSCON 0xE0100000
28	#define S5P6442_PA_VIC1 (0xE4100000)
29	#define S5P6442_PA_VIC2 (0xE4200000)
30		27
31	#define S5P6442_PA_SROMC (0xE7000000)	28	#define S5P6442_PA_GPIO 0xE0200000
32	#define S5P_PA_SROMC S5P6442_PA_SROMC
33		29
34	#define S5P6442_PA_MDMA 0xE8000000	30	#define S5P6442_PA_VIC0 0xE4000000
35	#define S5P6442_PA_PDMA 0xE9000000	31	#define S5P6442_PA_VIC1 0xE4100000
		32	#define S5P6442_PA_VIC2 0xE4200000
36		33
37	#define S5P6442_PA_TIMER (0xEA000000)	34	#define S5P6442_PA_SROMC 0xE7000000
38	#define S5P_PA_TIMER S5P6442_PA_TIMER
39		35
40	#define S5P6442_PA_SYSTIMER (0xEA100000)	36	#define S5P6442_PA_MDMA 0xE8000000
		37	#define S5P6442_PA_PDMA 0xE9000000
41		38
42	#define S5P6442_PA_WATCHDOG (0xEA200000)	39	#define S5P6442_PA_TIMER 0xEA000000
43		40
44	#define S5P6442_PA_UART (0xEC000000)	41	#define S5P6442_PA_SYSTIMER 0xEA100000
45		42
46	#define S5P_PA_UART0 (S5P6442_PA_UART + 0x0)	43	#define S5P6442_PA_WATCHDOG 0xEA200000
47	#define S5P_PA_UART1 (S5P6442_PA_UART + 0x400)
48	#define S5P_PA_UART2 (S5P6442_PA_UART + 0x800)
49	#define S5P_SZ_UART SZ_256
50		44
51	#define S5P6442_PA_IIC0 (0xEC100000)	45	#define S5P6442_PA_UART 0xEC000000
52		46
53	#define S5P6442_PA_SDRAM (0x20000000)	47	#define S5P6442_PA_IIC0 0xEC100000
54	#define S5P_PA_SDRAM S5P6442_PA_SDRAM
55		48
56	#define S5P6442_PA_SPI 0xEC300000	49	#define S5P6442_PA_SPI 0xEC300000
57		50
58	/* I2S */
59	#define S5P6442_PA_I2S0 0xC0B00000
60	#define S5P6442_PA_I2S1 0xF2200000
61
62	/* PCM */
63	#define S5P6442_PA_PCM0 0xF2400000	51	#define S5P6442_PA_PCM0 0xF2400000
64	#define S5P6442_PA_PCM1 0xF2500000	52	#define S5P6442_PA_PCM1 0xF2500000
65		53
66	/* compatibiltiy defines. */	54	/* Compatibiltiy Defines */
		55
		56	#define S3C_PA_IIC S5P6442_PA_IIC0
67	#define S3C_PA_WDT S5P6442_PA_WATCHDOG	57	#define S3C_PA_WDT S5P6442_PA_WATCHDOG
		58
		59	#define S5P_PA_CHIPID S5P6442_PA_CHIPID
		60	#define S5P_PA_SDRAM S5P6442_PA_SDRAM
		61	#define S5P_PA_SROMC S5P6442_PA_SROMC
		62	#define S5P_PA_SYSCON S5P6442_PA_SYSCON
		63	#define S5P_PA_TIMER S5P6442_PA_TIMER
		64
		65	/* UART */
		66
68	#define S3C_PA_UART S5P6442_PA_UART	67	#define S3C_PA_UART S5P6442_PA_UART
69	#define S3C_PA_IIC S5P6442_PA_IIC0	68
		69	#define S5P_PA_UART(x) (S3C_PA_UART + ((x) * S3C_UART_OFFSET))
		70	#define S5P_PA_UART0 S5P_PA_UART(0)
		71	#define S5P_PA_UART1 S5P_PA_UART(1)
		72	#define S5P_PA_UART2 S5P_PA_UART(2)
		73
		74	#define S5P_SZ_UART SZ_256
70		75
71	#endif /* __ASM_ARCH_MAP_H */	76	#endif /* __ASM_ARCH_MAP_H */

/* * TUN - Universal TUN/TAP device driver. * Copyright (C) 1999-2002 Maxim Krasnyansky <maxk@qualcomm.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * $Id: tun.c,v 1.15 2002/03/01 02:44:24 maxk Exp $ */ /* * Changes: * * Mike Kershaw <dragorn@kismetwireless.net> 2005/08/14 * Add TUNSETLINK ioctl to set the link encapsulation * * Mark Smith <markzzzsmith@yahoo.com.au> * Use random_ether_addr() for tap MAC address. * * Harald Roelle <harald.roelle@ifi.lmu.de> 2004/04/20 * Fixes in packet dropping, queue length setting and queue wakeup. * Increased default tx queue length. * Added ethtool API. * Minor cleanups * * Daniel Podlejski <underley@underley.eu.org> * Modifications for 2.3.99-pre5 kernel. */ #define DRV_NAME "tun" #define DRV_VERSION "1.6" #define DRV_DESCRIPTION "Universal TUN/TAP device driver" #define DRV_COPYRIGHT "(C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>" #include <linux/module.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/major.h> #include <linux/slab.h> #include <linux/smp_lock.h> #include <linux/poll.h> #include <linux/fcntl.h> #include <linux/init.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/miscdevice.h> #include <linux/ethtool.h> #include <linux/rtnetlink.h> #include <linux/if.h> #include <linux/if_arp.h> #include <linux/if_ether.h> #include <linux/if_tun.h> #include <linux/crc32.h> #include <linux/nsproxy.h> #include <linux/virtio_net.h> #include <net/net_namespace.h> #include <net/netns/generic.h> #include <net/rtnetlink.h> #include <net/sock.h> #include <asm/system.h> #include <asm/uaccess.h> /* Uncomment to enable debugging */ /* #define TUN_DEBUG 1 */ #ifdef TUN_DEBUG static int debug; #define DBG if(tun->debug)printk #define DBG1 if(debug==2)printk #else #define DBG( a... ) #define DBG1( a... ) #endif #define FLT_EXACT_COUNT 8 struct tap_filter { unsigned int count; /* Number of addrs. Zero means disabled */ u32 mask[2]; /* Mask of the hashed addrs */ unsigned char addr[FLT_EXACT_COUNT][ETH_ALEN]; }; struct tun_file { atomic_t count; struct tun_struct *tun; struct net *net; }; struct tun_sock; struct tun_struct { struct tun_file *tfile; unsigned int flags; uid_t owner; gid_t group; struct net_device *dev; struct fasync_struct *fasync; struct tap_filter txflt; struct socket socket; #ifdef TUN_DEBUG int debug; #endif }; struct tun_sock { struct sock sk; struct tun_struct *tun; }; static inline struct tun_sock *tun_sk(struct sock *sk) { return container_of(sk, struct tun_sock, sk); } static int tun_attach(struct tun_struct *tun, struct file *file) { struct tun_file *tfile = file->private_data; int err; ASSERT_RTNL(); netif_tx_lock_bh(tun->dev); err = -EINVAL; if (tfile->tun) goto out; err = -EBUSY; if (tun->tfile) goto out; err = 0; tfile->tun = tun; tun->tfile = tfile; dev_hold(tun->dev); sock_hold(tun->socket.sk); atomic_inc(&tfile->count); out: netif_tx_unlock_bh(tun->dev); return err; } static void __tun_detach(struct tun_struct *tun) { /* Detach from net device */ netif_tx_lock_bh(tun->dev); tun->tfile = NULL; netif_tx_unlock_bh(tun->dev); /* Drop read queue */ skb_queue_purge(&tun->socket.sk->sk_receive_queue); /* Drop the extra count on the net device */ dev_put(tun->dev); } static void tun_detach(struct tun_struct *tun) { rtnl_lock(); __tun_detach(tun); rtnl_unlock(); } static struct tun_struct *__tun_get(struct tun_file *tfile) { struct tun_struct *tun = NULL; if (atomic_inc_not_zero(&tfile->count)) tun = tfile->tun; return tun; } static struct tun_struct *tun_get(struct file *file) { return __tun_get(file->private_data); } static void tun_put(struct tun_struct *tun) { struct tun_file *tfile = tun->tfile; if (atomic_dec_and_test(&tfile->count)) tun_detach(tfile->tun); } /* TAP filterting */ static void addr_hash_set(u32 *mask, const u8 *addr) { int n = ether_crc(ETH_ALEN, addr) >> 26; mask[n >> 5] |= (1 << (n & 31)); } static unsigned int addr_hash_test(const u32 *mask, const u8 *addr) { int n = ether_crc(ETH_ALEN, addr) >> 26; return mask[n >> 5] & (1 << (n & 31)); } static int update_filter(struct tap_filter *filter, void __user *arg) { struct { u8 u[ETH_ALEN]; } *addr; struct tun_filter uf; int err, alen, n, nexact; if (copy_from_user(&uf, arg, sizeof(uf))) return -EFAULT; if (!uf.count) { /* Disabled */ filter->count = 0; return 0; } alen = ETH_ALEN * uf.count; addr = kmalloc(alen, GFP_KERNEL); if (!addr) return -ENOMEM; if (copy_from_user(addr, arg + sizeof(uf), alen)) { err = -EFAULT; goto done; } /* The filter is updated without holding any locks. Which is * perfectly safe. We disable it first and in the worst * case we'll accept a few undesired packets. */ filter->count = 0; wmb(); /* Use first set of addresses as an exact filter */ for (n = 0; n < uf.count && n < FLT_EXACT_COUNT; n++) memcpy(filter->addr[n], addr[n].u, ETH_ALEN); nexact = n; /* Remaining multicast addresses are hashed, * unicast will leave the filter disabled. */ memset(filter->mask, 0, sizeof(filter->mask)); for (; n < uf.count; n++) { if (!is_multicast_ether_addr(addr[n].u)) { err = 0; /* no filter */ goto done; } addr_hash_set(filter->mask, addr[n].u); } /* For ALLMULTI just set the mask to all ones. * This overrides the mask populated above. */ if ((uf.flags & TUN_FLT_ALLMULTI)) memset(filter->mask, ~0, sizeof(filter->mask)); /* Now enable the filter */ wmb(); filter->count = nexact; /* Return the number of exact filters */ err = nexact; done: kfree(addr); return err; } /* Returns: 0 - drop, !=0 - accept */ static int run_filter(struct tap_filter *filter, const struct sk_buff *skb) { /* Cannot use eth_hdr(skb) here because skb_mac_hdr() is incorrect * at this point. */ struct ethhdr *eh = (struct ethhdr *) skb->data; int i; /* Exact match */ for (i = 0; i < filter->count; i++) if (!compare_ether_addr(eh->h_dest, filter->addr[i])) return 1; /* Inexact match (multicast only) */ if (is_multicast_ether_addr(eh->h_dest)) return addr_hash_test(filter->mask, eh->h_dest); return 0; } /* * Checks whether the packet is accepted or not. * Returns: 0 - drop, !=0 - accept */ static int check_filter(struct tap_filter *filter, const struct sk_buff *skb) { if (!filter->count) return 1; return run_filter(filter, skb); } /* Network device part of the driver */ static const struct ethtool_ops tun_ethtool_ops; /* Net device detach from fd. */ static void tun_net_uninit(struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); struct tun_file *tfile = tun->tfile; /* Inform the methods they need to stop using the dev. */ if (tfile) { wake_up_all(&tun->socket.wait); if (atomic_dec_and_test(&tfile->count)) __tun_detach(tun); } } static void tun_free_netdev(struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); sock_put(tun->socket.sk); } /* Net device open. */ static int tun_net_open(struct net_device *dev) { netif_start_queue(dev); return 0; } /* Net device close. */ static int tun_net_close(struct net_device *dev) { netif_stop_queue(dev); return 0; } /* Net device start xmit */ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); DBG(KERN_INFO "%s: tun_net_xmit %d\n", tun->dev->name, skb->len); /* Drop packet if interface is not attached */ if (!tun->tfile) goto drop; /* Drop if the filter does not like it. * This is a noop if the filter is disabled. * Filter can be enabled only for the TAP devices. */ if (!check_filter(&tun->txflt, skb)) goto drop; if (skb_queue_len(&tun->socket.sk->sk_receive_queue) >= dev->tx_queue_len) { if (!(tun->flags & TUN_ONE_QUEUE)) { /* Normal queueing mode. */ /* Packet scheduler handles dropping of further packets. */ netif_stop_queue(dev); /* We won't see all dropped packets individually, so overrun * error is more appropriate. */ dev->stats.tx_fifo_errors++; } else { /* Single queue mode. * Driver handles dropping of all packets itself. */ goto drop; } } /* Enqueue packet */ skb_queue_tail(&tun->socket.sk->sk_receive_queue, skb); dev->trans_start = jiffies; /* Notify and wake up reader process */ if (tun->flags & TUN_FASYNC) kill_fasync(&tun->fasync, SIGIO, POLL_IN); wake_up_interruptible(&tun->socket.wait); return NETDEV_TX_OK; drop: dev->stats.tx_dropped++; kfree_skb(skb); return NETDEV_TX_OK; } static void tun_net_mclist(struct net_device *dev) { /* * This callback is supposed to deal with mc filter in * _rx_ path and has nothing to do with the _tx_ path. * In rx path we always accept everything userspace gives us. */ return; } #define MIN_MTU 68 #define MAX_MTU 65535 static int tun_net_change_mtu(struct net_device *dev, int new_mtu) { if (new_mtu < MIN_MTU || new_mtu + dev->hard_header_len > MAX_MTU) return -EINVAL; dev->mtu = new_mtu; return 0; } static const struct net_device_ops tun_netdev_ops = { .ndo_uninit = tun_net_uninit, .ndo_open = tun_net_open, .ndo_stop = tun_net_close, .ndo_start_xmit = tun_net_xmit, .ndo_change_mtu = tun_net_change_mtu, }; static const struct net_device_ops tap_netdev_ops = { .ndo_uninit = tun_net_uninit, .ndo_open = tun_net_open, .ndo_stop = tun_net_close, .ndo_start_xmit = tun_net_xmit, .ndo_change_mtu = tun_net_change_mtu, .ndo_set_multicast_list = tun_net_mclist, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; /* Initialize net device. */ static void tun_net_init(struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); switch (tun->flags & TUN_TYPE_MASK) { case TUN_TUN_DEV: dev->netdev_ops = &tun_netdev_ops; /* Point-to-Point TUN Device */ dev->hard_header_len = 0; dev->addr_len = 0; dev->mtu = 1500; /* Zero header length */ dev->type = ARPHRD_NONE; dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; dev->tx_queue_len = TUN_READQ_SIZE; /* We prefer our own queue length */ break; case TUN_TAP_DEV: dev->netdev_ops = &tap_netdev_ops; /* Ethernet TAP Device */ ether_setup(dev); random_ether_addr(dev->dev_addr); dev->tx_queue_len = TUN_READQ_SIZE; /* We prefer our own queue length */ break; } } /* Character device part */ /* Poll */ static unsigned int tun_chr_poll(struct file *file, poll_table * wait) { struct tun_file *tfile = file->private_data; struct tun_struct *tun = __tun_get(tfile); struct sock *sk; unsigned int mask = 0; if (!tun) return POLLERR; sk = tun->socket.sk; DBG(KERN_INFO "%s: tun_chr_poll\n", tun->dev->name); poll_wait(file, &tun->socket.wait, wait); if (!skb_queue_empty(&sk->sk_receive_queue)) mask |= POLLIN | POLLRDNORM; if (sock_writeable(sk) || (!test_and_set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags) && sock_writeable(sk))) mask |= POLLOUT | POLLWRNORM; if (tun->dev->reg_state != NETREG_REGISTERED) mask = POLLERR; tun_put(tun); return mask; } /* prepad is the amount to reserve at front. len is length after that. * linear is a hint as to how much to copy (usually headers). */ static inline struct sk_buff *tun_alloc_skb(struct tun_struct *tun, size_t prepad, size_t len, size_t linear, int noblock) { struct sock *sk = tun->socket.sk; struct sk_buff *skb; int err; /* Under a page? Don't bother with paged skb. */ if (prepad + len < PAGE_SIZE || !linear) linear = len; skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock, &err); if (!skb) return ERR_PTR(err); skb_reserve(skb, prepad); skb_put(skb, linear); skb->data_len = len - linear; skb->len += len - linear; return skb; } /* Get packet from user space buffer */ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, const struct iovec *iv, size_t count, int noblock) { struct tun_pi pi = { 0, cpu_to_be16(ETH_P_IP) }; struct sk_buff *skb; size_t len = count, align = 0; struct virtio_net_hdr gso = { 0 }; int offset = 0; if (!(tun->flags & TUN_NO_PI)) { if ((len -= sizeof(pi)) > count) return -EINVAL; if (memcpy_fromiovecend((void *)&pi, iv, 0, sizeof(pi))) return -EFAULT; offset += sizeof(pi); } if (tun->flags & TUN_VNET_HDR) { if ((len -= sizeof(gso)) > count) return -EINVAL; if (memcpy_fromiovecend((void *)&gso, iv, offset, sizeof(gso))) return -EFAULT; if ((gso.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && gso.csum_start + gso.csum_offset + 2 > gso.hdr_len) gso.hdr_len = gso.csum_start + gso.csum_offset + 2; if (gso.hdr_len > len) return -EINVAL; offset += sizeof(gso); } if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV) { align = NET_IP_ALIGN; if (unlikely(len < ETH_HLEN || (gso.hdr_len && gso.hdr_len < ETH_HLEN))) return -EINVAL; } skb = tun_alloc_skb(tun, align, len, gso.hdr_len, noblock); if (IS_ERR(skb)) { if (PTR_ERR(skb) != -EAGAIN) tun->dev->stats.rx_dropped++; return PTR_ERR(skb); } if (skb_copy_datagram_from_iovec(skb, 0, iv, offset, len)) { tun->dev->stats.rx_dropped++; kfree_skb(skb); return -EFAULT; } if (gso.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { if (!skb_partial_csum_set(skb, gso.csum_start, gso.csum_offset)) { tun->dev->stats.rx_frame_errors++; kfree_skb(skb); return -EINVAL; } } else if (tun->flags & TUN_NOCHECKSUM) skb->ip_summed = CHECKSUM_UNNECESSARY; switch (tun->flags & TUN_TYPE_MASK) { case TUN_TUN_DEV: if (tun->flags & TUN_NO_PI) { switch (skb->data[0] & 0xf0) { case 0x40: pi.proto = htons(ETH_P_IP); break; case 0x60: pi.proto = htons(ETH_P_IPV6); break; default: tun->dev->stats.rx_dropped++; kfree_skb(skb); return -EINVAL; } } skb_reset_mac_header(skb); skb->protocol = pi.proto; skb->dev = tun->dev; break; case TUN_TAP_DEV: skb->protocol = eth_type_trans(skb, tun->dev); break; }; if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) { pr_debug("GSO!\n"); switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { case VIRTIO_NET_HDR_GSO_TCPV4: skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; break; case VIRTIO_NET_HDR_GSO_TCPV6: skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; break; case VIRTIO_NET_HDR_GSO_UDP: skb_shinfo(skb)->gso_type = SKB_GSO_UDP; break; default: tun->dev->stats.rx_frame_errors++; kfree_skb(skb); return -EINVAL; } if (gso.gso_type & VIRTIO_NET_HDR_GSO_ECN) skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN; skb_shinfo(skb)->gso_size = gso.gso_size; if (skb_shinfo(skb)->gso_size == 0) { tun->dev->stats.rx_frame_errors++; kfree_skb(skb); return -EINVAL; } /* Header must be checked, and gso_segs computed. */ skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; skb_shinfo(skb)->gso_segs = 0; } netif_rx_ni(skb); tun->dev->stats.rx_packets++; tun->dev->stats.rx_bytes += len; return count; } static ssize_t tun_chr_aio_write(struct kiocb *iocb, const struct iovec *iv, unsigned long count, loff_t pos) { struct file *file = iocb->ki_filp; struct tun_struct *tun = tun_get(file); ssize_t result; if (!tun) return -EBADFD; DBG(KERN_INFO "%s: tun_chr_write %ld\n", tun->dev->name, count); result = tun_get_user(tun, iv, iov_length(iv, count), file->f_flags & O_NONBLOCK); tun_put(tun); return result; } /* Put packet to the user space buffer */ static __inline__ ssize_t tun_put_user(struct tun_struct *tun, struct sk_buff *skb, const struct iovec *iv, int len) { struct tun_pi pi = { 0, skb->protocol }; ssize_t total = 0; if (!(tun->flags & TUN_NO_PI)) { if ((len -= sizeof(pi)) < 0) return -EINVAL; if (len < skb->len) { /* Packet will be striped */ pi.flags |= TUN_PKT_STRIP; } if (memcpy_toiovecend(iv, (void *) &pi, 0, sizeof(pi))) return -EFAULT; total += sizeof(pi); } if (tun->flags & TUN_VNET_HDR) { struct virtio_net_hdr gso = { 0 }; /* no info leak */ if ((len -= sizeof(gso)) < 0) return -EINVAL; if (skb_is_gso(skb)) { struct skb_shared_info *sinfo = skb_shinfo(skb); /* This is a hint as to how much should be linear. */ gso.hdr_len = skb_headlen(skb); gso.gso_size = sinfo->gso_size; if (sinfo->gso_type & SKB_GSO_TCPV4) gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4; else if (sinfo->gso_type & SKB_GSO_TCPV6) gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV6; else if (sinfo->gso_type & SKB_GSO_UDP) gso.gso_type = VIRTIO_NET_HDR_GSO_UDP; else BUG(); if (sinfo->gso_type & SKB_GSO_TCP_ECN) gso.gso_type |= VIRTIO_NET_HDR_GSO_ECN; } else gso.gso_type = VIRTIO_NET_HDR_GSO_NONE; if (skb->ip_summed == CHECKSUM_PARTIAL) { gso.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; gso.csum_start = skb->csum_start - skb_headroom(skb); gso.csum_offset = skb->csum_offset; } /* else everything is zero */ if (unlikely(memcpy_toiovecend(iv, (void *)&gso, total, sizeof(gso)))) return -EFAULT; total += sizeof(gso); } len = min_t(int, skb->len, len); skb_copy_datagram_const_iovec(skb, 0, iv, total, len); total += len; tun->dev->stats.tx_packets++; tun->dev->stats.tx_bytes += len; return total; } static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv, unsigned long count, loff_t pos) { struct file *file = iocb->ki_filp; struct tun_file *tfile = file->private_data; struct tun_struct *tun = __tun_get(tfile); DECLARE_WAITQUEUE(wait, current); struct sk_buff *skb; ssize_t len, ret = 0; if (!tun) return -EBADFD; DBG(KERN_INFO "%s: tun_chr_read\n", tun->dev->name); len = iov_length(iv, count); if (len < 0) { ret = -EINVAL; goto out; } add_wait_queue(&tun->socket.wait, &wait); while (len) { current->state = TASK_INTERRUPTIBLE; /* Read frames from the queue */ if (!(skb=skb_dequeue(&tun->socket.sk->sk_receive_queue))) { if (file->f_flags & O_NONBLOCK) { ret = -EAGAIN; break; } if (signal_pending(current)) { ret = -ERESTARTSYS; break; } if (tun->dev->reg_state != NETREG_REGISTERED) { ret = -EIO; break; } /* Nothing to read, let's sleep */ schedule(); continue; } netif_wake_queue(tun->dev); ret = tun_put_user(tun, skb, iv, len); kfree_skb(skb); break; } current->state = TASK_RUNNING; remove_wait_queue(&tun->socket.wait, &wait); out: tun_put(tun); return ret; } static void tun_setup(struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); tun->owner = -1; tun->group = -1; dev->ethtool_ops = &tun_ethtool_ops; dev->destructor = tun_free_netdev; } /* Trivial set of netlink ops to allow deleting tun or tap * device with netlink. */ static int tun_validate(struct nlattr *tb[], struct nlattr *data[]) { return -EINVAL; } static struct rtnl_link_ops tun_link_ops __read_mostly = { .kind = DRV_NAME, .priv_size = sizeof(struct tun_struct), .setup = tun_setup, .validate = tun_validate, }; static void tun_sock_write_space(struct sock *sk) { struct tun_struct *tun; if (!sock_writeable(sk)) return; if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags)) return; if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) wake_up_interruptible_sync(sk->sk_sleep); tun = container_of(sk, struct tun_sock, sk)->tun; kill_fasync(&tun->fasync, SIGIO, POLL_OUT); } static void tun_sock_destruct(struct sock *sk) { free_netdev(container_of(sk, struct tun_sock, sk)->tun->dev); } static struct proto tun_proto = { .name = "tun", .owner = THIS_MODULE, .obj_size = sizeof(struct tun_sock), }; static int tun_flags(struct tun_struct *tun) { int flags = 0; if (tun->flags & TUN_TUN_DEV) flags |= IFF_TUN; else flags |= IFF_TAP; if (tun->flags & TUN_NO_PI) flags |= IFF_NO_PI; if (tun->flags & TUN_ONE_QUEUE) flags |= IFF_ONE_QUEUE; if (tun->flags & TUN_VNET_HDR) flags |= IFF_VNET_HDR; return flags; } static ssize_t tun_show_flags(struct device *dev, struct device_attribute *attr, char *buf) { struct tun_struct *tun = netdev_priv(to_net_dev(dev)); return sprintf(buf, "0x%x\n", tun_flags(tun)); } static ssize_t tun_show_owner(struct device *dev, struct device_attribute *attr, char *buf) { struct tun_struct *tun = netdev_priv(to_net_dev(dev)); return sprintf(buf, "%d\n", tun->owner); } static ssize_t tun_show_group(struct device *dev, struct device_attribute *attr, char *buf) { struct tun_struct *tun = netdev_priv(to_net_dev(dev)); return sprintf(buf, "%d\n", tun->group); } static DEVICE_ATTR(tun_flags, 0444, tun_show_flags, NULL); static DEVICE_ATTR(owner, 0444, tun_show_owner, NULL); static DEVICE_ATTR(group, 0444, tun_show_group, NULL); static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) { struct sock *sk; struct tun_struct *tun; struct net_device *dev; int err; dev = __dev_get_by_name(net, ifr->ifr_name); if (dev) { const struct cred *cred = current_cred(); if (ifr->ifr_flags & IFF_TUN_EXCL) return -EBUSY; if ((ifr->ifr_flags & IFF_TUN) && dev->netdev_ops == &tun_netdev_ops) tun = netdev_priv(dev); else if ((ifr->ifr_flags & IFF_TAP) && dev->netdev_ops == &tap_netdev_ops) tun = netdev_priv(dev); else return -EINVAL; if (((tun->owner != -1 && cred->euid != tun->owner) || (tun->group != -1 && !in_egroup_p(tun->group))) && !capable(CAP_NET_ADMIN)) return -EPERM; err = security_tun_dev_attach(tun->socket.sk); if (err < 0) return err; err = tun_attach(tun, file); if (err < 0) return err; } else { char *name; unsigned long flags = 0; if (!capable(CAP_NET_ADMIN)) return -EPERM; err = security_tun_dev_create(); if (err < 0) return err; /* Set dev type */ if (ifr->ifr_flags & IFF_TUN) { /* TUN device */ flags |= TUN_TUN_DEV; name = "tun%d"; } else if (ifr->ifr_flags & IFF_TAP) { /* TAP device */ flags |= TUN_TAP_DEV; name = "tap%d"; } else return -EINVAL; if (*ifr->ifr_name) name = ifr->ifr_name; dev = alloc_netdev(sizeof(struct tun_struct), name, tun_setup); if (!dev) return -ENOMEM; dev_net_set(dev, net); dev->rtnl_link_ops = &tun_link_ops; tun = netdev_priv(dev); tun->dev = dev; tun->flags = flags; tun->txflt.count = 0; err = -ENOMEM; sk = sk_alloc(net, AF_UNSPEC, GFP_KERNEL, &tun_proto); if (!sk) goto err_free_dev; init_waitqueue_head(&tun->socket.wait); sock_init_data(&tun->socket, sk); sk->sk_write_space = tun_sock_write_space; sk->sk_sndbuf = INT_MAX; container_of(sk, struct tun_sock, sk)->tun = tun; security_tun_dev_post_create(sk); tun_net_init(dev); if (strchr(dev->name, '%')) { err = dev_alloc_name(dev, dev->name); if (err < 0) goto err_free_sk; } err = register_netdevice(tun->dev); if (err < 0) goto err_free_sk; if (device_create_file(&tun->dev->dev, &dev_attr_tun_flags) || device_create_file(&tun->dev->dev, &dev_attr_owner) || device_create_file(&tun->dev->dev, &dev_attr_group)) printk(KERN_ERR "Failed to create tun sysfs files\n"); sk->sk_destruct = tun_sock_destruct; err = tun_attach(tun, file); if (err < 0) goto failed; } DBG(KERN_INFO "%s: tun_set_iff\n", tun->dev->name); if (ifr->ifr_flags & IFF_NO_PI) tun->flags |= TUN_NO_PI; else tun->flags &= ~TUN_NO_PI; if (ifr->ifr_flags & IFF_ONE_QUEUE) tun->flags |= TUN_ONE_QUEUE; else tun->flags &= ~TUN_ONE_QUEUE; if (ifr->ifr_flags & IFF_VNET_HDR) tun->flags |= TUN_VNET_HDR; else tun->flags &= ~TUN_VNET_HDR; /* Make sure persistent devices do not get stuck in * xoff state. */ if (netif_running(tun->dev)) netif_wake_queue(tun->dev); strcpy(ifr->ifr_name, tun->dev->name); return 0; err_free_sk: sock_put(sk); err_free_dev: free_netdev(dev); failed: return err; } static int tun_get_iff(struct net *net, struct tun_struct *tun, struct ifreq *ifr) { DBG(KERN_INFO "%s: tun_get_iff\n", tun->dev->name); strcpy(ifr->ifr_name, tun->dev->name); ifr->ifr_flags = tun_flags(tun); return 0; } /* This is like a cut-down ethtool ops, except done via tun fd so no * privs required. */ static int set_offload(struct net_device *dev, unsigned long arg) { unsigned int old_features, features; old_features = dev->features; /* Unset features, set them as we chew on the arg. */ features = (old_features & ~(NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST |NETIF_F_TSO_ECN|NETIF_F_TSO|NETIF_F_TSO6 |NETIF_F_UFO)); if (arg & TUN_F_CSUM) { features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST; arg &= ~TUN_F_CSUM; if (arg & (TUN_F_TSO4|TUN_F_TSO6)) { if (arg & TUN_F_TSO_ECN) { features |= NETIF_F_TSO_ECN; arg &= ~TUN_F_TSO_ECN; } if (arg & TUN_F_TSO4) features |= NETIF_F_TSO; if (arg & TUN_F_TSO6) features |= NETIF_F_TSO6; arg &= ~(TUN_F_TSO4|TUN_F_TSO6); } if (arg & TUN_F_UFO) { features |= NETIF_F_UFO; arg &= ~TUN_F_UFO; } } /* This gives the user a way to test for new features in future by * trying to set them. */ if (arg) return -EINVAL; dev->features = features; if (old_features != dev->features) netdev_features_change(dev); return 0; } static long tun_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct tun_file *tfile = file->private_data; struct tun_struct *tun; void __user* argp = (void __user*)arg; struct ifreq ifr; int sndbuf; int ret; if (cmd == TUNSETIFF || _IOC_TYPE(cmd) == 0x89) if (copy_from_user(&ifr, argp, sizeof ifr)) return -EFAULT; if (cmd == TUNGETFEATURES) { /* Currently this just means: "what IFF flags are valid?". * This is needed because we never checked for invalid flags on * TUNSETIFF. */ return put_user(IFF_TUN | IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE | IFF_VNET_HDR, (unsigned int __user*)argp); } rtnl_lock(); tun = __tun_get(tfile); if (cmd == TUNSETIFF && !tun) { ifr.ifr_name[IFNAMSIZ-1] = '\0'; ret = tun_set_iff(tfile->net, file, &ifr); if (ret) goto unlock; if (copy_to_user(argp, &ifr, sizeof(ifr))) ret = -EFAULT; goto unlock; } ret = -EBADFD; if (!tun) goto unlock; DBG(KERN_INFO "%s: tun_chr_ioctl cmd %d\n", tun->dev->name, cmd); ret = 0; switch (cmd) { case TUNGETIFF: ret = tun_get_iff(current->nsproxy->net_ns, tun, &ifr); if (ret) break; if (copy_to_user(argp, &ifr, sizeof(ifr))) ret = -EFAULT; break; case TUNSETNOCSUM: /* Disable/Enable checksum */ if (arg) tun->flags |= TUN_NOCHECKSUM; else tun->flags &= ~TUN_NOCHECKSUM; DBG(KERN_INFO "%s: checksum %s\n", tun->dev->name, arg ? "disabled" : "enabled"); break; case TUNSETPERSIST: /* Disable/Enable persist mode */ if (arg) tun->flags |= TUN_PERSIST; else tun->flags &= ~TUN_PERSIST; DBG(KERN_INFO "%s: persist %s\n", tun->dev->name, arg ? "enabled" : "disabled"); break; case TUNSETOWNER: /* Set owner of the device */ tun->owner = (uid_t) arg; DBG(KERN_INFO "%s: owner set to %d\n", tun->dev->name, tun->owner); break; case TUNSETGROUP: /* Set group of the device */ tun->group= (gid_t) arg; DBG(KERN_INFO "%s: group set to %d\n", tun->dev->name, tun->group); break; case TUNSETLINK: /* Only allow setting the type when the interface is down */ if (tun->dev->flags & IFF_UP) { DBG(KERN_INFO "%s: Linktype set failed because interface is up\n", tun->dev->name); ret = -EBUSY; } else { tun->dev->type = (int) arg; DBG(KERN_INFO "%s: linktype set to %d\n", tun->dev->name, tun->dev->type); ret = 0; } break; #ifdef TUN_DEBUG case TUNSETDEBUG: tun->debug = arg; break; #endif case TUNSETOFFLOAD: ret = set_offload(tun->dev, arg); break; case TUNSETTXFILTER: /* Can be set only for TAPs */ ret = -EINVAL; if ((tun->flags & TUN_TYPE_MASK) != TUN_TAP_DEV) break; ret = update_filter(&tun->txflt, (void __user *)arg); break; case SIOCGIFHWADDR: /* Get hw addres */ memcpy(ifr.ifr_hwaddr.sa_data, tun->dev->dev_addr, ETH_ALEN); ifr.ifr_hwaddr.sa_family = tun->dev->type; if (copy_to_user(argp, &ifr, sizeof ifr)) ret = -EFAULT; break; case SIOCSIFHWADDR: /* Set hw address */ DBG(KERN_DEBUG "%s: set hw address: %pM\n", tun->dev->name, ifr.ifr_hwaddr.sa_data); ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr); break; case TUNGETSNDBUF: sndbuf = tun->socket.sk->sk_sndbuf; if (copy_to_user(argp, &sndbuf, sizeof(sndbuf))) ret = -EFAULT; break; case TUNSETSNDBUF: if (copy_from_user(&sndbuf, argp, sizeof(sndbuf))) { ret = -EFAULT; break; } tun->socket.sk->sk_sndbuf = sndbuf; break; default: ret = -EINVAL; break; }; unlock: rtnl_unlock(); if (tun) tun_put(tun); return ret; } static int tun_chr_fasync(int fd, struct file *file, int on) { struct tun_struct *tun = tun_get(file); int ret; if (!tun) return -EBADFD; DBG(KERN_INFO "%s: tun_chr_fasync %d\n", tun->dev->name, on); lock_kernel(); if ((ret = fasync_helper(fd, file, on, &tun->fasync)) < 0) goto out; if (on) { ret = __f_setown(file, task_pid(current), PIDTYPE_PID, 0); if (ret) goto out; tun->flags |= TUN_FASYNC; } else tun->flags &= ~TUN_FASYNC; ret = 0; out: unlock_kernel(); tun_put(tun); return ret; } static int tun_chr_open(struct inode *inode, struct file * file) { struct tun_file *tfile; cycle_kernel_lock(); DBG1(KERN_INFO "tunX: tun_chr_open\n"); tfile = kmalloc(sizeof(*tfile), GFP_KERNEL); if (!tfile) return -ENOMEM; atomic_set(&tfile->count, 0); tfile->tun = NULL; tfile->net = get_net(current->nsproxy->net_ns); file->private_data = tfile; return 0; } static int tun_chr_close(struct inode *inode, struct file *file) { struct tun_file *tfile = file->private_data; struct tun_struct *tun; tun = __tun_get(tfile); if (tun) { struct net_device *dev = tun->dev; DBG(KERN_INFO "%s: tun_chr_close\n", dev->name); __tun_detach(tun); /* If desireable, unregister the netdevice. */ if (!(tun->flags & TUN_PERSIST)) { rtnl_lock(); if (dev->reg_state == NETREG_REGISTERED) unregister_netdevice(dev); rtnl_unlock(); } } tun = tfile->tun; if (tun) sock_put(tun->socket.sk); put_net(tfile->net); kfree(tfile); return 0; } static const struct file_operations tun_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .read = do_sync_read, .aio_read = tun_chr_aio_read, .write = do_sync_write, .aio_write = tun_chr_aio_write, .poll = tun_chr_poll, .unlocked_ioctl = tun_chr_ioctl, .open = tun_chr_open, .release = tun_chr_close, .fasync = tun_chr_fasync }; static struct miscdevice tun_miscdev = { .minor = TUN_MINOR, .name = "tun", .nodename = "net/tun", .fops = &tun_fops, }; /* ethtool interface */ static int tun_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { cmd->supported = 0; cmd->advertising = 0; cmd->speed = SPEED_10; cmd->duplex = DUPLEX_FULL; cmd->port = PORT_TP; cmd->phy_address = 0; cmd->transceiver = XCVR_INTERNAL; cmd->autoneg = AUTONEG_DISABLE; cmd->maxtxpkt = 0; cmd->maxrxpkt = 0; return 0; } static void tun_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { struct tun_struct *tun = netdev_priv(dev); strcpy(info->driver, DRV_NAME); strcpy(info->version, DRV_VERSION); strcpy(info->fw_version, "N/A"); switch (tun->flags & TUN_TYPE_MASK) { case TUN_TUN_DEV: strcpy(info->bus_info, "tun"); break; case TUN_TAP_DEV: strcpy(info->bus_info, "tap"); break; } } static u32 tun_get_msglevel(struct net_device *dev) { #ifdef TUN_DEBUG struct tun_struct *tun = netdev_priv(dev); return tun->debug; #else return -EOPNOTSUPP; #endif } static void tun_set_msglevel(struct net_device *dev, u32 value) { #ifdef TUN_DEBUG struct tun_struct *tun = netdev_priv(dev); tun->debug = value; #endif } static u32 tun_get_link(struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); return !!tun->tfile; } static u32 tun_get_rx_csum(struct net_device *dev) { struct tun_struct *tun = netdev_priv(dev); return (tun->flags & TUN_NOCHECKSUM) == 0; } static int tun_set_rx_csum(struct net_device *dev, u32 data) { struct tun_struct *tun = netdev_priv(dev); if (data) tun->flags &= ~TUN_NOCHECKSUM; else tun->flags |= TUN_NOCHECKSUM; return 0; } static const struct ethtool_ops tun_ethtool_ops = { .get_settings = tun_get_settings, .get_drvinfo = tun_get_drvinfo, .get_msglevel = tun_get_msglevel, .set_msglevel = tun_set_msglevel, .get_link = tun_get_link, .get_rx_csum = tun_get_rx_csum, .set_rx_csum = tun_set_rx_csum }; static int __init tun_init(void) { int ret = 0; printk(KERN_INFO "tun: %s, %s\n", DRV_DESCRIPTION, DRV_VERSION); printk(KERN_INFO "tun: %s\n", DRV_COPYRIGHT); ret = rtnl_link_register(&tun_link_ops); if (ret) { printk(KERN_ERR "tun: Can't register link_ops\n"); goto err_linkops; } ret = misc_register(&tun_miscdev); if (ret) { printk(KERN_ERR "tun: Can't register misc device %d\n", TUN_MINOR); goto err_misc; } return 0; err_misc: rtnl_link_unregister(&tun_link_ops); err_linkops: return ret; } static void tun_cleanup(void) { misc_deregister(&tun_miscdev); rtnl_link_unregister(&tun_link_ops); } module_init(tun_init); module_exit(tun_cleanup); MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_AUTHOR(DRV_COPYRIGHT); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(TUN_MINOR);


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